1 /* Perform type resolution on the various structures.
2 Copyright (C) 2001-2019 Free Software Foundation, Inc.
3 Contributed by Andy Vaught
5 This file is part of GCC.
7 GCC is free software; you can redistribute it and/or modify it under
8 the terms of the GNU General Public License as published by the Free
9 Software Foundation; either version 3, or (at your option) any later
12 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
13 WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
17 You should have received a copy of the GNU General Public License
18 along with GCC; see the file COPYING3. If not see
19 <http://www.gnu.org/licenses/>. */
23 #include "coretypes.h"
27 #include "arith.h" /* For gfc_compare_expr(). */
28 #include "dependency.h"
30 #include "target-memory.h" /* for gfc_simplify_transfer */
31 #include "constructor.h"
33 /* Types used in equivalence statements. */
37 SEQ_NONDEFAULT
, SEQ_NUMERIC
, SEQ_CHARACTER
, SEQ_MIXED
40 /* Stack to keep track of the nesting of blocks as we move through the
41 code. See resolve_branch() and gfc_resolve_code(). */
43 typedef struct code_stack
45 struct gfc_code
*head
, *current
;
46 struct code_stack
*prev
;
48 /* This bitmap keeps track of the targets valid for a branch from
49 inside this block except for END {IF|SELECT}s of enclosing
51 bitmap reachable_labels
;
55 static code_stack
*cs_base
= NULL
;
58 /* Nonzero if we're inside a FORALL or DO CONCURRENT block. */
60 static int forall_flag
;
61 int gfc_do_concurrent_flag
;
63 /* True when we are resolving an expression that is an actual argument to
65 static bool actual_arg
= false;
66 /* True when we are resolving an expression that is the first actual argument
68 static bool first_actual_arg
= false;
71 /* Nonzero if we're inside a OpenMP WORKSHARE or PARALLEL WORKSHARE block. */
73 static int omp_workshare_flag
;
75 /* True if we are processing a formal arglist. The corresponding function
76 resets the flag each time that it is read. */
77 static bool formal_arg_flag
= false;
79 /* True if we are resolving a specification expression. */
80 static bool specification_expr
= false;
82 /* The id of the last entry seen. */
83 static int current_entry_id
;
85 /* We use bitmaps to determine if a branch target is valid. */
86 static bitmap_obstack labels_obstack
;
88 /* True when simplifying a EXPR_VARIABLE argument to an inquiry function. */
89 static bool inquiry_argument
= false;
93 gfc_is_formal_arg (void)
95 return formal_arg_flag
;
98 /* Is the symbol host associated? */
100 is_sym_host_assoc (gfc_symbol
*sym
, gfc_namespace
*ns
)
102 for (ns
= ns
->parent
; ns
; ns
= ns
->parent
)
111 /* Ensure a typespec used is valid; for instance, TYPE(t) is invalid if t is
112 an ABSTRACT derived-type. If where is not NULL, an error message with that
113 locus is printed, optionally using name. */
116 resolve_typespec_used (gfc_typespec
* ts
, locus
* where
, const char* name
)
118 if (ts
->type
== BT_DERIVED
&& ts
->u
.derived
->attr
.abstract
)
123 gfc_error ("%qs at %L is of the ABSTRACT type %qs",
124 name
, where
, ts
->u
.derived
->name
);
126 gfc_error ("ABSTRACT type %qs used at %L",
127 ts
->u
.derived
->name
, where
);
138 check_proc_interface (gfc_symbol
*ifc
, locus
*where
)
140 /* Several checks for F08:C1216. */
141 if (ifc
->attr
.procedure
)
143 gfc_error ("Interface %qs at %L is declared "
144 "in a later PROCEDURE statement", ifc
->name
, where
);
149 /* For generic interfaces, check if there is
150 a specific procedure with the same name. */
151 gfc_interface
*gen
= ifc
->generic
;
152 while (gen
&& strcmp (gen
->sym
->name
, ifc
->name
) != 0)
156 gfc_error ("Interface %qs at %L may not be generic",
161 if (ifc
->attr
.proc
== PROC_ST_FUNCTION
)
163 gfc_error ("Interface %qs at %L may not be a statement function",
167 if (gfc_is_intrinsic (ifc
, 0, ifc
->declared_at
)
168 || gfc_is_intrinsic (ifc
, 1, ifc
->declared_at
))
169 ifc
->attr
.intrinsic
= 1;
170 if (ifc
->attr
.intrinsic
&& !gfc_intrinsic_actual_ok (ifc
->name
, 0))
172 gfc_error ("Intrinsic procedure %qs not allowed in "
173 "PROCEDURE statement at %L", ifc
->name
, where
);
176 if (!ifc
->attr
.if_source
&& !ifc
->attr
.intrinsic
&& ifc
->name
[0] != '\0')
178 gfc_error ("Interface %qs at %L must be explicit", ifc
->name
, where
);
185 static void resolve_symbol (gfc_symbol
*sym
);
188 /* Resolve the interface for a PROCEDURE declaration or procedure pointer. */
191 resolve_procedure_interface (gfc_symbol
*sym
)
193 gfc_symbol
*ifc
= sym
->ts
.interface
;
200 gfc_error ("PROCEDURE %qs at %L may not be used as its own interface",
201 sym
->name
, &sym
->declared_at
);
204 if (!check_proc_interface (ifc
, &sym
->declared_at
))
207 if (ifc
->attr
.if_source
|| ifc
->attr
.intrinsic
)
209 /* Resolve interface and copy attributes. */
210 resolve_symbol (ifc
);
211 if (ifc
->attr
.intrinsic
)
212 gfc_resolve_intrinsic (ifc
, &ifc
->declared_at
);
216 sym
->ts
= ifc
->result
->ts
;
217 sym
->attr
.allocatable
= ifc
->result
->attr
.allocatable
;
218 sym
->attr
.pointer
= ifc
->result
->attr
.pointer
;
219 sym
->attr
.dimension
= ifc
->result
->attr
.dimension
;
220 sym
->attr
.class_ok
= ifc
->result
->attr
.class_ok
;
221 sym
->as
= gfc_copy_array_spec (ifc
->result
->as
);
227 sym
->attr
.allocatable
= ifc
->attr
.allocatable
;
228 sym
->attr
.pointer
= ifc
->attr
.pointer
;
229 sym
->attr
.dimension
= ifc
->attr
.dimension
;
230 sym
->attr
.class_ok
= ifc
->attr
.class_ok
;
231 sym
->as
= gfc_copy_array_spec (ifc
->as
);
233 sym
->ts
.interface
= ifc
;
234 sym
->attr
.function
= ifc
->attr
.function
;
235 sym
->attr
.subroutine
= ifc
->attr
.subroutine
;
237 sym
->attr
.pure
= ifc
->attr
.pure
;
238 sym
->attr
.elemental
= ifc
->attr
.elemental
;
239 sym
->attr
.contiguous
= ifc
->attr
.contiguous
;
240 sym
->attr
.recursive
= ifc
->attr
.recursive
;
241 sym
->attr
.always_explicit
= ifc
->attr
.always_explicit
;
242 sym
->attr
.ext_attr
|= ifc
->attr
.ext_attr
;
243 sym
->attr
.is_bind_c
= ifc
->attr
.is_bind_c
;
244 /* Copy char length. */
245 if (ifc
->ts
.type
== BT_CHARACTER
&& ifc
->ts
.u
.cl
)
247 sym
->ts
.u
.cl
= gfc_new_charlen (sym
->ns
, ifc
->ts
.u
.cl
);
248 if (sym
->ts
.u
.cl
->length
&& !sym
->ts
.u
.cl
->resolved
249 && !gfc_resolve_expr (sym
->ts
.u
.cl
->length
))
258 /* Resolve types of formal argument lists. These have to be done early so that
259 the formal argument lists of module procedures can be copied to the
260 containing module before the individual procedures are resolved
261 individually. We also resolve argument lists of procedures in interface
262 blocks because they are self-contained scoping units.
264 Since a dummy argument cannot be a non-dummy procedure, the only
265 resort left for untyped names are the IMPLICIT types. */
268 resolve_formal_arglist (gfc_symbol
*proc
)
270 gfc_formal_arglist
*f
;
272 bool saved_specification_expr
;
275 if (proc
->result
!= NULL
)
280 if (gfc_elemental (proc
)
281 || sym
->attr
.pointer
|| sym
->attr
.allocatable
282 || (sym
->as
&& sym
->as
->rank
!= 0))
284 proc
->attr
.always_explicit
= 1;
285 sym
->attr
.always_explicit
= 1;
288 formal_arg_flag
= true;
290 for (f
= proc
->formal
; f
; f
= f
->next
)
298 /* Alternate return placeholder. */
299 if (gfc_elemental (proc
))
300 gfc_error ("Alternate return specifier in elemental subroutine "
301 "%qs at %L is not allowed", proc
->name
,
303 if (proc
->attr
.function
)
304 gfc_error ("Alternate return specifier in function "
305 "%qs at %L is not allowed", proc
->name
,
309 else if (sym
->attr
.procedure
&& sym
->attr
.if_source
!= IFSRC_DECL
310 && !resolve_procedure_interface (sym
))
313 if (strcmp (proc
->name
, sym
->name
) == 0)
315 gfc_error ("Self-referential argument "
316 "%qs at %L is not allowed", sym
->name
,
321 if (sym
->attr
.if_source
!= IFSRC_UNKNOWN
)
322 resolve_formal_arglist (sym
);
324 if (sym
->attr
.subroutine
|| sym
->attr
.external
)
326 if (sym
->attr
.flavor
== FL_UNKNOWN
)
327 gfc_add_flavor (&sym
->attr
, FL_PROCEDURE
, sym
->name
, &sym
->declared_at
);
331 if (sym
->ts
.type
== BT_UNKNOWN
&& !proc
->attr
.intrinsic
332 && (!sym
->attr
.function
|| sym
->result
== sym
))
333 gfc_set_default_type (sym
, 1, sym
->ns
);
336 as
= sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
337 ? CLASS_DATA (sym
)->as
: sym
->as
;
339 saved_specification_expr
= specification_expr
;
340 specification_expr
= true;
341 gfc_resolve_array_spec (as
, 0);
342 specification_expr
= saved_specification_expr
;
344 /* We can't tell if an array with dimension (:) is assumed or deferred
345 shape until we know if it has the pointer or allocatable attributes.
347 if (as
&& as
->rank
> 0 && as
->type
== AS_DEFERRED
348 && ((sym
->ts
.type
!= BT_CLASS
349 && !(sym
->attr
.pointer
|| sym
->attr
.allocatable
))
350 || (sym
->ts
.type
== BT_CLASS
351 && !(CLASS_DATA (sym
)->attr
.class_pointer
352 || CLASS_DATA (sym
)->attr
.allocatable
)))
353 && sym
->attr
.flavor
!= FL_PROCEDURE
)
355 as
->type
= AS_ASSUMED_SHAPE
;
356 for (i
= 0; i
< as
->rank
; i
++)
357 as
->lower
[i
] = gfc_get_int_expr (gfc_default_integer_kind
, NULL
, 1);
360 if ((as
&& as
->rank
> 0 && as
->type
== AS_ASSUMED_SHAPE
)
361 || (as
&& as
->type
== AS_ASSUMED_RANK
)
362 || sym
->attr
.pointer
|| sym
->attr
.allocatable
|| sym
->attr
.target
363 || (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
364 && (CLASS_DATA (sym
)->attr
.class_pointer
365 || CLASS_DATA (sym
)->attr
.allocatable
366 || CLASS_DATA (sym
)->attr
.target
))
367 || sym
->attr
.optional
)
369 proc
->attr
.always_explicit
= 1;
371 proc
->result
->attr
.always_explicit
= 1;
374 /* If the flavor is unknown at this point, it has to be a variable.
375 A procedure specification would have already set the type. */
377 if (sym
->attr
.flavor
== FL_UNKNOWN
)
378 gfc_add_flavor (&sym
->attr
, FL_VARIABLE
, sym
->name
, &sym
->declared_at
);
382 if (sym
->attr
.flavor
== FL_PROCEDURE
)
387 gfc_error ("Dummy procedure %qs of PURE procedure at %L must "
388 "also be PURE", sym
->name
, &sym
->declared_at
);
392 else if (!sym
->attr
.pointer
)
394 if (proc
->attr
.function
&& sym
->attr
.intent
!= INTENT_IN
)
397 gfc_notify_std (GFC_STD_F2008
, "Argument %qs"
398 " of pure function %qs at %L with VALUE "
399 "attribute but without INTENT(IN)",
400 sym
->name
, proc
->name
, &sym
->declared_at
);
402 gfc_error ("Argument %qs of pure function %qs at %L must "
403 "be INTENT(IN) or VALUE", sym
->name
, proc
->name
,
407 if (proc
->attr
.subroutine
&& sym
->attr
.intent
== INTENT_UNKNOWN
)
410 gfc_notify_std (GFC_STD_F2008
, "Argument %qs"
411 " of pure subroutine %qs at %L with VALUE "
412 "attribute but without INTENT", sym
->name
,
413 proc
->name
, &sym
->declared_at
);
415 gfc_error ("Argument %qs of pure subroutine %qs at %L "
416 "must have its INTENT specified or have the "
417 "VALUE attribute", sym
->name
, proc
->name
,
423 if (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.intent
== INTENT_OUT
)
425 gfc_error ("INTENT(OUT) argument %qs of pure procedure %qs at %L"
426 " may not be polymorphic", sym
->name
, proc
->name
,
432 if (proc
->attr
.implicit_pure
)
434 if (sym
->attr
.flavor
== FL_PROCEDURE
)
437 proc
->attr
.implicit_pure
= 0;
439 else if (!sym
->attr
.pointer
)
441 if (proc
->attr
.function
&& sym
->attr
.intent
!= INTENT_IN
443 proc
->attr
.implicit_pure
= 0;
445 if (proc
->attr
.subroutine
&& sym
->attr
.intent
== INTENT_UNKNOWN
447 proc
->attr
.implicit_pure
= 0;
451 if (gfc_elemental (proc
))
454 if (sym
->attr
.codimension
455 || (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
)
456 && CLASS_DATA (sym
)->attr
.codimension
))
458 gfc_error ("Coarray dummy argument %qs at %L to elemental "
459 "procedure", sym
->name
, &sym
->declared_at
);
463 if (sym
->as
|| (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
)
464 && CLASS_DATA (sym
)->as
))
466 gfc_error ("Argument %qs of elemental procedure at %L must "
467 "be scalar", sym
->name
, &sym
->declared_at
);
471 if (sym
->attr
.allocatable
472 || (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
)
473 && CLASS_DATA (sym
)->attr
.allocatable
))
475 gfc_error ("Argument %qs of elemental procedure at %L cannot "
476 "have the ALLOCATABLE attribute", sym
->name
,
481 if (sym
->attr
.pointer
482 || (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
)
483 && CLASS_DATA (sym
)->attr
.class_pointer
))
485 gfc_error ("Argument %qs of elemental procedure at %L cannot "
486 "have the POINTER attribute", sym
->name
,
491 if (sym
->attr
.flavor
== FL_PROCEDURE
)
493 gfc_error ("Dummy procedure %qs not allowed in elemental "
494 "procedure %qs at %L", sym
->name
, proc
->name
,
499 /* Fortran 2008 Corrigendum 1, C1290a. */
500 if (sym
->attr
.intent
== INTENT_UNKNOWN
&& !sym
->attr
.value
)
502 gfc_error ("Argument %qs of elemental procedure %qs at %L must "
503 "have its INTENT specified or have the VALUE "
504 "attribute", sym
->name
, proc
->name
,
510 /* Each dummy shall be specified to be scalar. */
511 if (proc
->attr
.proc
== PROC_ST_FUNCTION
)
515 /* F03:C1263 (R1238) The function-name and each dummy-arg-name
516 shall be specified, explicitly or implicitly, to be scalar. */
517 gfc_error ("Argument '%s' of statement function '%s' at %L "
518 "must be scalar", sym
->name
, proc
->name
,
523 if (sym
->ts
.type
== BT_CHARACTER
)
525 gfc_charlen
*cl
= sym
->ts
.u
.cl
;
526 if (!cl
|| !cl
->length
|| cl
->length
->expr_type
!= EXPR_CONSTANT
)
528 gfc_error ("Character-valued argument %qs of statement "
529 "function at %L must have constant length",
530 sym
->name
, &sym
->declared_at
);
536 formal_arg_flag
= false;
540 /* Work function called when searching for symbols that have argument lists
541 associated with them. */
544 find_arglists (gfc_symbol
*sym
)
546 if (sym
->attr
.if_source
== IFSRC_UNKNOWN
|| sym
->ns
!= gfc_current_ns
547 || gfc_fl_struct (sym
->attr
.flavor
) || sym
->attr
.intrinsic
)
550 resolve_formal_arglist (sym
);
554 /* Given a namespace, resolve all formal argument lists within the namespace.
558 resolve_formal_arglists (gfc_namespace
*ns
)
563 gfc_traverse_ns (ns
, find_arglists
);
568 resolve_contained_fntype (gfc_symbol
*sym
, gfc_namespace
*ns
)
572 if (sym
&& sym
->attr
.flavor
== FL_PROCEDURE
574 && sym
->ns
->parent
->proc_name
575 && sym
->ns
->parent
->proc_name
->attr
.flavor
== FL_PROCEDURE
576 && !strcmp (sym
->name
, sym
->ns
->parent
->proc_name
->name
))
577 gfc_error ("Contained procedure %qs at %L has the same name as its "
578 "encompassing procedure", sym
->name
, &sym
->declared_at
);
580 /* If this namespace is not a function or an entry master function,
582 if (! sym
|| !(sym
->attr
.function
|| sym
->attr
.flavor
== FL_VARIABLE
)
583 || sym
->attr
.entry_master
)
589 /* Try to find out of what the return type is. */
590 if (sym
->result
->ts
.type
== BT_UNKNOWN
&& sym
->result
->ts
.interface
== NULL
)
592 t
= gfc_set_default_type (sym
->result
, 0, ns
);
594 if (!t
&& !sym
->result
->attr
.untyped
)
596 if (sym
->result
== sym
)
597 gfc_error ("Contained function %qs at %L has no IMPLICIT type",
598 sym
->name
, &sym
->declared_at
);
599 else if (!sym
->result
->attr
.proc_pointer
)
600 gfc_error ("Result %qs of contained function %qs at %L has "
601 "no IMPLICIT type", sym
->result
->name
, sym
->name
,
602 &sym
->result
->declared_at
);
603 sym
->result
->attr
.untyped
= 1;
607 /* Fortran 2008 Draft Standard, page 535, C418, on type-param-value
608 type, lists the only ways a character length value of * can be used:
609 dummy arguments of procedures, named constants, function results and
610 in allocate statements if the allocate_object is an assumed length dummy
611 in external functions. Internal function results and results of module
612 procedures are not on this list, ergo, not permitted. */
614 if (sym
->result
->ts
.type
== BT_CHARACTER
)
616 gfc_charlen
*cl
= sym
->result
->ts
.u
.cl
;
617 if ((!cl
|| !cl
->length
) && !sym
->result
->ts
.deferred
)
619 /* See if this is a module-procedure and adapt error message
622 gcc_assert (ns
->parent
&& ns
->parent
->proc_name
);
623 module_proc
= (ns
->parent
->proc_name
->attr
.flavor
== FL_MODULE
);
625 gfc_error (module_proc
626 ? G_("Character-valued module procedure %qs at %L"
627 " must not be assumed length")
628 : G_("Character-valued internal function %qs at %L"
629 " must not be assumed length"),
630 sym
->name
, &sym
->declared_at
);
636 /* Add NEW_ARGS to the formal argument list of PROC, taking care not to
637 introduce duplicates. */
640 merge_argument_lists (gfc_symbol
*proc
, gfc_formal_arglist
*new_args
)
642 gfc_formal_arglist
*f
, *new_arglist
;
645 for (; new_args
!= NULL
; new_args
= new_args
->next
)
647 new_sym
= new_args
->sym
;
648 /* See if this arg is already in the formal argument list. */
649 for (f
= proc
->formal
; f
; f
= f
->next
)
651 if (new_sym
== f
->sym
)
658 /* Add a new argument. Argument order is not important. */
659 new_arglist
= gfc_get_formal_arglist ();
660 new_arglist
->sym
= new_sym
;
661 new_arglist
->next
= proc
->formal
;
662 proc
->formal
= new_arglist
;
667 /* Flag the arguments that are not present in all entries. */
670 check_argument_lists (gfc_symbol
*proc
, gfc_formal_arglist
*new_args
)
672 gfc_formal_arglist
*f
, *head
;
675 for (f
= proc
->formal
; f
; f
= f
->next
)
680 for (new_args
= head
; new_args
; new_args
= new_args
->next
)
682 if (new_args
->sym
== f
->sym
)
689 f
->sym
->attr
.not_always_present
= 1;
694 /* Resolve alternate entry points. If a symbol has multiple entry points we
695 create a new master symbol for the main routine, and turn the existing
696 symbol into an entry point. */
699 resolve_entries (gfc_namespace
*ns
)
701 gfc_namespace
*old_ns
;
705 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
706 static int master_count
= 0;
708 if (ns
->proc_name
== NULL
)
711 /* No need to do anything if this procedure doesn't have alternate entry
716 /* We may already have resolved alternate entry points. */
717 if (ns
->proc_name
->attr
.entry_master
)
720 /* If this isn't a procedure something has gone horribly wrong. */
721 gcc_assert (ns
->proc_name
->attr
.flavor
== FL_PROCEDURE
);
723 /* Remember the current namespace. */
724 old_ns
= gfc_current_ns
;
728 /* Add the main entry point to the list of entry points. */
729 el
= gfc_get_entry_list ();
730 el
->sym
= ns
->proc_name
;
732 el
->next
= ns
->entries
;
734 ns
->proc_name
->attr
.entry
= 1;
736 /* If it is a module function, it needs to be in the right namespace
737 so that gfc_get_fake_result_decl can gather up the results. The
738 need for this arose in get_proc_name, where these beasts were
739 left in their own namespace, to keep prior references linked to
740 the entry declaration.*/
741 if (ns
->proc_name
->attr
.function
742 && ns
->parent
&& ns
->parent
->proc_name
->attr
.flavor
== FL_MODULE
)
745 /* Do the same for entries where the master is not a module
746 procedure. These are retained in the module namespace because
747 of the module procedure declaration. */
748 for (el
= el
->next
; el
; el
= el
->next
)
749 if (el
->sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
750 && el
->sym
->attr
.mod_proc
)
754 /* Add an entry statement for it. */
755 c
= gfc_get_code (EXEC_ENTRY
);
760 /* Create a new symbol for the master function. */
761 /* Give the internal function a unique name (within this file).
762 Also include the function name so the user has some hope of figuring
763 out what is going on. */
764 snprintf (name
, GFC_MAX_SYMBOL_LEN
, "master.%d.%s",
765 master_count
++, ns
->proc_name
->name
);
766 gfc_get_ha_symbol (name
, &proc
);
767 gcc_assert (proc
!= NULL
);
769 gfc_add_procedure (&proc
->attr
, PROC_INTERNAL
, proc
->name
, NULL
);
770 if (ns
->proc_name
->attr
.subroutine
)
771 gfc_add_subroutine (&proc
->attr
, proc
->name
, NULL
);
775 gfc_typespec
*ts
, *fts
;
776 gfc_array_spec
*as
, *fas
;
777 gfc_add_function (&proc
->attr
, proc
->name
, NULL
);
779 fas
= ns
->entries
->sym
->as
;
780 fas
= fas
? fas
: ns
->entries
->sym
->result
->as
;
781 fts
= &ns
->entries
->sym
->result
->ts
;
782 if (fts
->type
== BT_UNKNOWN
)
783 fts
= gfc_get_default_type (ns
->entries
->sym
->result
->name
, NULL
);
784 for (el
= ns
->entries
->next
; el
; el
= el
->next
)
786 ts
= &el
->sym
->result
->ts
;
788 as
= as
? as
: el
->sym
->result
->as
;
789 if (ts
->type
== BT_UNKNOWN
)
790 ts
= gfc_get_default_type (el
->sym
->result
->name
, NULL
);
792 if (! gfc_compare_types (ts
, fts
)
793 || (el
->sym
->result
->attr
.dimension
794 != ns
->entries
->sym
->result
->attr
.dimension
)
795 || (el
->sym
->result
->attr
.pointer
796 != ns
->entries
->sym
->result
->attr
.pointer
))
798 else if (as
&& fas
&& ns
->entries
->sym
->result
!= el
->sym
->result
799 && gfc_compare_array_spec (as
, fas
) == 0)
800 gfc_error ("Function %s at %L has entries with mismatched "
801 "array specifications", ns
->entries
->sym
->name
,
802 &ns
->entries
->sym
->declared_at
);
803 /* The characteristics need to match and thus both need to have
804 the same string length, i.e. both len=*, or both len=4.
805 Having both len=<variable> is also possible, but difficult to
806 check at compile time. */
807 else if (ts
->type
== BT_CHARACTER
&& ts
->u
.cl
&& fts
->u
.cl
808 && (((ts
->u
.cl
->length
&& !fts
->u
.cl
->length
)
809 ||(!ts
->u
.cl
->length
&& fts
->u
.cl
->length
))
811 && ts
->u
.cl
->length
->expr_type
812 != fts
->u
.cl
->length
->expr_type
)
814 && ts
->u
.cl
->length
->expr_type
== EXPR_CONSTANT
815 && mpz_cmp (ts
->u
.cl
->length
->value
.integer
,
816 fts
->u
.cl
->length
->value
.integer
) != 0)))
817 gfc_notify_std (GFC_STD_GNU
, "Function %s at %L with "
818 "entries returning variables of different "
819 "string lengths", ns
->entries
->sym
->name
,
820 &ns
->entries
->sym
->declared_at
);
825 sym
= ns
->entries
->sym
->result
;
826 /* All result types the same. */
828 if (sym
->attr
.dimension
)
829 gfc_set_array_spec (proc
, gfc_copy_array_spec (sym
->as
), NULL
);
830 if (sym
->attr
.pointer
)
831 gfc_add_pointer (&proc
->attr
, NULL
);
835 /* Otherwise the result will be passed through a union by
837 proc
->attr
.mixed_entry_master
= 1;
838 for (el
= ns
->entries
; el
; el
= el
->next
)
840 sym
= el
->sym
->result
;
841 if (sym
->attr
.dimension
)
843 if (el
== ns
->entries
)
844 gfc_error ("FUNCTION result %s cannot be an array in "
845 "FUNCTION %s at %L", sym
->name
,
846 ns
->entries
->sym
->name
, &sym
->declared_at
);
848 gfc_error ("ENTRY result %s cannot be an array in "
849 "FUNCTION %s at %L", sym
->name
,
850 ns
->entries
->sym
->name
, &sym
->declared_at
);
852 else if (sym
->attr
.pointer
)
854 if (el
== ns
->entries
)
855 gfc_error ("FUNCTION result %s cannot be a POINTER in "
856 "FUNCTION %s at %L", sym
->name
,
857 ns
->entries
->sym
->name
, &sym
->declared_at
);
859 gfc_error ("ENTRY result %s cannot be a POINTER in "
860 "FUNCTION %s at %L", sym
->name
,
861 ns
->entries
->sym
->name
, &sym
->declared_at
);
866 if (ts
->type
== BT_UNKNOWN
)
867 ts
= gfc_get_default_type (sym
->name
, NULL
);
871 if (ts
->kind
== gfc_default_integer_kind
)
875 if (ts
->kind
== gfc_default_real_kind
876 || ts
->kind
== gfc_default_double_kind
)
880 if (ts
->kind
== gfc_default_complex_kind
)
884 if (ts
->kind
== gfc_default_logical_kind
)
888 /* We will issue error elsewhere. */
896 if (el
== ns
->entries
)
897 gfc_error ("FUNCTION result %s cannot be of type %s "
898 "in FUNCTION %s at %L", sym
->name
,
899 gfc_typename (ts
), ns
->entries
->sym
->name
,
902 gfc_error ("ENTRY result %s cannot be of type %s "
903 "in FUNCTION %s at %L", sym
->name
,
904 gfc_typename (ts
), ns
->entries
->sym
->name
,
911 proc
->attr
.access
= ACCESS_PRIVATE
;
912 proc
->attr
.entry_master
= 1;
914 /* Merge all the entry point arguments. */
915 for (el
= ns
->entries
; el
; el
= el
->next
)
916 merge_argument_lists (proc
, el
->sym
->formal
);
918 /* Check the master formal arguments for any that are not
919 present in all entry points. */
920 for (el
= ns
->entries
; el
; el
= el
->next
)
921 check_argument_lists (proc
, el
->sym
->formal
);
923 /* Use the master function for the function body. */
924 ns
->proc_name
= proc
;
926 /* Finalize the new symbols. */
927 gfc_commit_symbols ();
929 /* Restore the original namespace. */
930 gfc_current_ns
= old_ns
;
934 /* Resolve common variables. */
936 resolve_common_vars (gfc_common_head
*common_block
, bool named_common
)
938 gfc_symbol
*csym
= common_block
->head
;
940 for (; csym
; csym
= csym
->common_next
)
942 /* gfc_add_in_common may have been called before, but the reported errors
943 have been ignored to continue parsing.
944 We do the checks again here. */
945 if (!csym
->attr
.use_assoc
)
947 gfc_add_in_common (&csym
->attr
, csym
->name
, &common_block
->where
);
948 gfc_notify_std (GFC_STD_F2018_OBS
, "COMMON block at %L",
949 &common_block
->where
);
952 if (csym
->value
|| csym
->attr
.data
)
954 if (!csym
->ns
->is_block_data
)
955 gfc_notify_std (GFC_STD_GNU
, "Variable %qs at %L is in COMMON "
956 "but only in BLOCK DATA initialization is "
957 "allowed", csym
->name
, &csym
->declared_at
);
958 else if (!named_common
)
959 gfc_notify_std (GFC_STD_GNU
, "Initialized variable %qs at %L is "
960 "in a blank COMMON but initialization is only "
961 "allowed in named common blocks", csym
->name
,
965 if (UNLIMITED_POLY (csym
))
966 gfc_error_now ("%qs in cannot appear in COMMON at %L "
967 "[F2008:C5100]", csym
->name
, &csym
->declared_at
);
969 if (csym
->ts
.type
!= BT_DERIVED
)
972 if (!(csym
->ts
.u
.derived
->attr
.sequence
973 || csym
->ts
.u
.derived
->attr
.is_bind_c
))
974 gfc_error_now ("Derived type variable %qs in COMMON at %L "
975 "has neither the SEQUENCE nor the BIND(C) "
976 "attribute", csym
->name
, &csym
->declared_at
);
977 if (csym
->ts
.u
.derived
->attr
.alloc_comp
)
978 gfc_error_now ("Derived type variable %qs in COMMON at %L "
979 "has an ultimate component that is "
980 "allocatable", csym
->name
, &csym
->declared_at
);
981 if (gfc_has_default_initializer (csym
->ts
.u
.derived
))
982 gfc_error_now ("Derived type variable %qs in COMMON at %L "
983 "may not have default initializer", csym
->name
,
986 if (csym
->attr
.flavor
== FL_UNKNOWN
&& !csym
->attr
.proc_pointer
)
987 gfc_add_flavor (&csym
->attr
, FL_VARIABLE
, csym
->name
, &csym
->declared_at
);
991 /* Resolve common blocks. */
993 resolve_common_blocks (gfc_symtree
*common_root
)
998 if (common_root
== NULL
)
1001 if (common_root
->left
)
1002 resolve_common_blocks (common_root
->left
);
1003 if (common_root
->right
)
1004 resolve_common_blocks (common_root
->right
);
1006 resolve_common_vars (common_root
->n
.common
, true);
1008 /* The common name is a global name - in Fortran 2003 also if it has a
1009 C binding name, since Fortran 2008 only the C binding name is a global
1011 if (!common_root
->n
.common
->binding_label
1012 || gfc_notification_std (GFC_STD_F2008
))
1014 gsym
= gfc_find_gsymbol (gfc_gsym_root
,
1015 common_root
->n
.common
->name
);
1017 if (gsym
&& gfc_notification_std (GFC_STD_F2008
)
1018 && gsym
->type
== GSYM_COMMON
1019 && ((common_root
->n
.common
->binding_label
1020 && (!gsym
->binding_label
1021 || strcmp (common_root
->n
.common
->binding_label
,
1022 gsym
->binding_label
) != 0))
1023 || (!common_root
->n
.common
->binding_label
1024 && gsym
->binding_label
)))
1026 gfc_error ("In Fortran 2003 COMMON %qs block at %L is a global "
1027 "identifier and must thus have the same binding name "
1028 "as the same-named COMMON block at %L: %s vs %s",
1029 common_root
->n
.common
->name
, &common_root
->n
.common
->where
,
1031 common_root
->n
.common
->binding_label
1032 ? common_root
->n
.common
->binding_label
: "(blank)",
1033 gsym
->binding_label
? gsym
->binding_label
: "(blank)");
1037 if (gsym
&& gsym
->type
!= GSYM_COMMON
1038 && !common_root
->n
.common
->binding_label
)
1040 gfc_error ("COMMON block %qs at %L uses the same global identifier "
1042 common_root
->n
.common
->name
, &common_root
->n
.common
->where
,
1046 if (gsym
&& gsym
->type
!= GSYM_COMMON
)
1048 gfc_error ("Fortran 2008: COMMON block %qs with binding label at "
1049 "%L sharing the identifier with global non-COMMON-block "
1050 "entity at %L", common_root
->n
.common
->name
,
1051 &common_root
->n
.common
->where
, &gsym
->where
);
1056 gsym
= gfc_get_gsymbol (common_root
->n
.common
->name
, false);
1057 gsym
->type
= GSYM_COMMON
;
1058 gsym
->where
= common_root
->n
.common
->where
;
1064 if (common_root
->n
.common
->binding_label
)
1066 gsym
= gfc_find_gsymbol (gfc_gsym_root
,
1067 common_root
->n
.common
->binding_label
);
1068 if (gsym
&& gsym
->type
!= GSYM_COMMON
)
1070 gfc_error ("COMMON block at %L with binding label %qs uses the same "
1071 "global identifier as entity at %L",
1072 &common_root
->n
.common
->where
,
1073 common_root
->n
.common
->binding_label
, &gsym
->where
);
1078 gsym
= gfc_get_gsymbol (common_root
->n
.common
->binding_label
, true);
1079 gsym
->type
= GSYM_COMMON
;
1080 gsym
->where
= common_root
->n
.common
->where
;
1086 gfc_find_symbol (common_root
->name
, gfc_current_ns
, 0, &sym
);
1090 if (sym
->attr
.flavor
== FL_PARAMETER
)
1091 gfc_error ("COMMON block %qs at %L is used as PARAMETER at %L",
1092 sym
->name
, &common_root
->n
.common
->where
, &sym
->declared_at
);
1094 if (sym
->attr
.external
)
1095 gfc_error ("COMMON block %qs at %L cannot have the EXTERNAL attribute",
1096 sym
->name
, &common_root
->n
.common
->where
);
1098 if (sym
->attr
.intrinsic
)
1099 gfc_error ("COMMON block %qs at %L is also an intrinsic procedure",
1100 sym
->name
, &common_root
->n
.common
->where
);
1101 else if (sym
->attr
.result
1102 || gfc_is_function_return_value (sym
, gfc_current_ns
))
1103 gfc_notify_std (GFC_STD_F2003
, "COMMON block %qs at %L "
1104 "that is also a function result", sym
->name
,
1105 &common_root
->n
.common
->where
);
1106 else if (sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.proc
!= PROC_INTERNAL
1107 && sym
->attr
.proc
!= PROC_ST_FUNCTION
)
1108 gfc_notify_std (GFC_STD_F2003
, "COMMON block %qs at %L "
1109 "that is also a global procedure", sym
->name
,
1110 &common_root
->n
.common
->where
);
1114 /* Resolve contained function types. Because contained functions can call one
1115 another, they have to be worked out before any of the contained procedures
1118 The good news is that if a function doesn't already have a type, the only
1119 way it can get one is through an IMPLICIT type or a RESULT variable, because
1120 by definition contained functions are contained namespace they're contained
1121 in, not in a sibling or parent namespace. */
1124 resolve_contained_functions (gfc_namespace
*ns
)
1126 gfc_namespace
*child
;
1129 resolve_formal_arglists (ns
);
1131 for (child
= ns
->contained
; child
; child
= child
->sibling
)
1133 /* Resolve alternate entry points first. */
1134 resolve_entries (child
);
1136 /* Then check function return types. */
1137 resolve_contained_fntype (child
->proc_name
, child
);
1138 for (el
= child
->entries
; el
; el
= el
->next
)
1139 resolve_contained_fntype (el
->sym
, child
);
1145 /* A Parameterized Derived Type constructor must contain values for
1146 the PDT KIND parameters or they must have a default initializer.
1147 Go through the constructor picking out the KIND expressions,
1148 storing them in 'param_list' and then call gfc_get_pdt_instance
1149 to obtain the PDT instance. */
1151 static gfc_actual_arglist
*param_list
, *param_tail
, *param
;
1154 get_pdt_spec_expr (gfc_component
*c
, gfc_expr
*expr
)
1156 param
= gfc_get_actual_arglist ();
1158 param_list
= param_tail
= param
;
1161 param_tail
->next
= param
;
1162 param_tail
= param_tail
->next
;
1165 param_tail
->name
= c
->name
;
1167 param_tail
->expr
= gfc_copy_expr (expr
);
1168 else if (c
->initializer
)
1169 param_tail
->expr
= gfc_copy_expr (c
->initializer
);
1172 param_tail
->spec_type
= SPEC_ASSUMED
;
1173 if (c
->attr
.pdt_kind
)
1175 gfc_error ("The KIND parameter %qs in the PDT constructor "
1176 "at %C has no value", param
->name
);
1185 get_pdt_constructor (gfc_expr
*expr
, gfc_constructor
**constr
,
1186 gfc_symbol
*derived
)
1188 gfc_constructor
*cons
= NULL
;
1189 gfc_component
*comp
;
1192 if (expr
&& expr
->expr_type
== EXPR_STRUCTURE
)
1193 cons
= gfc_constructor_first (expr
->value
.constructor
);
1198 comp
= derived
->components
;
1200 for (; comp
&& cons
; comp
= comp
->next
, cons
= gfc_constructor_next (cons
))
1203 && cons
->expr
->expr_type
== EXPR_STRUCTURE
1204 && comp
->ts
.type
== BT_DERIVED
)
1206 t
= get_pdt_constructor (cons
->expr
, NULL
, comp
->ts
.u
.derived
);
1210 else if (comp
->ts
.type
== BT_DERIVED
)
1212 t
= get_pdt_constructor (NULL
, &cons
, comp
->ts
.u
.derived
);
1216 else if ((comp
->attr
.pdt_kind
|| comp
->attr
.pdt_len
)
1217 && derived
->attr
.pdt_template
)
1219 t
= get_pdt_spec_expr (comp
, cons
->expr
);
1228 static bool resolve_fl_derived0 (gfc_symbol
*sym
);
1229 static bool resolve_fl_struct (gfc_symbol
*sym
);
1232 /* Resolve all of the elements of a structure constructor and make sure that
1233 the types are correct. The 'init' flag indicates that the given
1234 constructor is an initializer. */
1237 resolve_structure_cons (gfc_expr
*expr
, int init
)
1239 gfc_constructor
*cons
;
1240 gfc_component
*comp
;
1246 if (expr
->ts
.type
== BT_DERIVED
|| expr
->ts
.type
== BT_UNION
)
1248 if (expr
->ts
.u
.derived
->attr
.flavor
== FL_DERIVED
)
1249 resolve_fl_derived0 (expr
->ts
.u
.derived
);
1251 resolve_fl_struct (expr
->ts
.u
.derived
);
1253 /* If this is a Parameterized Derived Type template, find the
1254 instance corresponding to the PDT kind parameters. */
1255 if (expr
->ts
.u
.derived
->attr
.pdt_template
)
1258 t
= get_pdt_constructor (expr
, NULL
, expr
->ts
.u
.derived
);
1261 gfc_get_pdt_instance (param_list
, &expr
->ts
.u
.derived
, NULL
);
1263 expr
->param_list
= gfc_copy_actual_arglist (param_list
);
1266 gfc_free_actual_arglist (param_list
);
1268 if (!expr
->ts
.u
.derived
->attr
.pdt_type
)
1273 cons
= gfc_constructor_first (expr
->value
.constructor
);
1275 /* A constructor may have references if it is the result of substituting a
1276 parameter variable. In this case we just pull out the component we
1279 comp
= expr
->ref
->u
.c
.sym
->components
;
1281 comp
= expr
->ts
.u
.derived
->components
;
1283 for (; comp
&& cons
; comp
= comp
->next
, cons
= gfc_constructor_next (cons
))
1290 /* Unions use an EXPR_NULL contrived expression to tell the translation
1291 phase to generate an initializer of the appropriate length.
1293 if (cons
->expr
->ts
.type
== BT_UNION
&& cons
->expr
->expr_type
== EXPR_NULL
)
1296 if (!gfc_resolve_expr (cons
->expr
))
1302 rank
= comp
->as
? comp
->as
->rank
: 0;
1303 if (comp
->ts
.type
== BT_CLASS
1304 && !comp
->ts
.u
.derived
->attr
.unlimited_polymorphic
1305 && CLASS_DATA (comp
)->as
)
1306 rank
= CLASS_DATA (comp
)->as
->rank
;
1308 if (cons
->expr
->expr_type
!= EXPR_NULL
&& rank
!= cons
->expr
->rank
1309 && (comp
->attr
.allocatable
|| cons
->expr
->rank
))
1311 gfc_error ("The rank of the element in the structure "
1312 "constructor at %L does not match that of the "
1313 "component (%d/%d)", &cons
->expr
->where
,
1314 cons
->expr
->rank
, rank
);
1318 /* If we don't have the right type, try to convert it. */
1320 if (!comp
->attr
.proc_pointer
&&
1321 !gfc_compare_types (&cons
->expr
->ts
, &comp
->ts
))
1323 if (strcmp (comp
->name
, "_extends") == 0)
1325 /* Can afford to be brutal with the _extends initializer.
1326 The derived type can get lost because it is PRIVATE
1327 but it is not usage constrained by the standard. */
1328 cons
->expr
->ts
= comp
->ts
;
1330 else if (comp
->attr
.pointer
&& cons
->expr
->ts
.type
!= BT_UNKNOWN
)
1332 gfc_error ("The element in the structure constructor at %L, "
1333 "for pointer component %qs, is %s but should be %s",
1334 &cons
->expr
->where
, comp
->name
,
1335 gfc_basic_typename (cons
->expr
->ts
.type
),
1336 gfc_basic_typename (comp
->ts
.type
));
1341 bool t2
= gfc_convert_type (cons
->expr
, &comp
->ts
, 1);
1347 /* For strings, the length of the constructor should be the same as
1348 the one of the structure, ensure this if the lengths are known at
1349 compile time and when we are dealing with PARAMETER or structure
1351 if (cons
->expr
->ts
.type
== BT_CHARACTER
&& comp
->ts
.u
.cl
1352 && comp
->ts
.u
.cl
->length
1353 && comp
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
1354 && cons
->expr
->ts
.u
.cl
&& cons
->expr
->ts
.u
.cl
->length
1355 && cons
->expr
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
1356 && cons
->expr
->rank
!= 0
1357 && mpz_cmp (cons
->expr
->ts
.u
.cl
->length
->value
.integer
,
1358 comp
->ts
.u
.cl
->length
->value
.integer
) != 0)
1360 if (cons
->expr
->expr_type
== EXPR_VARIABLE
1361 && cons
->expr
->symtree
->n
.sym
->attr
.flavor
== FL_PARAMETER
)
1363 /* Wrap the parameter in an array constructor (EXPR_ARRAY)
1364 to make use of the gfc_resolve_character_array_constructor
1365 machinery. The expression is later simplified away to
1366 an array of string literals. */
1367 gfc_expr
*para
= cons
->expr
;
1368 cons
->expr
= gfc_get_expr ();
1369 cons
->expr
->ts
= para
->ts
;
1370 cons
->expr
->where
= para
->where
;
1371 cons
->expr
->expr_type
= EXPR_ARRAY
;
1372 cons
->expr
->rank
= para
->rank
;
1373 cons
->expr
->shape
= gfc_copy_shape (para
->shape
, para
->rank
);
1374 gfc_constructor_append_expr (&cons
->expr
->value
.constructor
,
1375 para
, &cons
->expr
->where
);
1378 if (cons
->expr
->expr_type
== EXPR_ARRAY
)
1380 /* Rely on the cleanup of the namespace to deal correctly with
1381 the old charlen. (There was a block here that attempted to
1382 remove the charlen but broke the chain in so doing.) */
1383 cons
->expr
->ts
.u
.cl
= gfc_new_charlen (gfc_current_ns
, NULL
);
1384 cons
->expr
->ts
.u
.cl
->length_from_typespec
= true;
1385 cons
->expr
->ts
.u
.cl
->length
= gfc_copy_expr (comp
->ts
.u
.cl
->length
);
1386 gfc_resolve_character_array_constructor (cons
->expr
);
1390 if (cons
->expr
->expr_type
== EXPR_NULL
1391 && !(comp
->attr
.pointer
|| comp
->attr
.allocatable
1392 || comp
->attr
.proc_pointer
|| comp
->ts
.f90_type
== BT_VOID
1393 || (comp
->ts
.type
== BT_CLASS
1394 && (CLASS_DATA (comp
)->attr
.class_pointer
1395 || CLASS_DATA (comp
)->attr
.allocatable
))))
1398 gfc_error ("The NULL in the structure constructor at %L is "
1399 "being applied to component %qs, which is neither "
1400 "a POINTER nor ALLOCATABLE", &cons
->expr
->where
,
1404 if (comp
->attr
.proc_pointer
&& comp
->ts
.interface
)
1406 /* Check procedure pointer interface. */
1407 gfc_symbol
*s2
= NULL
;
1412 c2
= gfc_get_proc_ptr_comp (cons
->expr
);
1415 s2
= c2
->ts
.interface
;
1418 else if (cons
->expr
->expr_type
== EXPR_FUNCTION
)
1420 s2
= cons
->expr
->symtree
->n
.sym
->result
;
1421 name
= cons
->expr
->symtree
->n
.sym
->result
->name
;
1423 else if (cons
->expr
->expr_type
!= EXPR_NULL
)
1425 s2
= cons
->expr
->symtree
->n
.sym
;
1426 name
= cons
->expr
->symtree
->n
.sym
->name
;
1429 if (s2
&& !gfc_compare_interfaces (comp
->ts
.interface
, s2
, name
, 0, 1,
1430 err
, sizeof (err
), NULL
, NULL
))
1432 gfc_error_opt (0, "Interface mismatch for procedure-pointer "
1433 "component %qs in structure constructor at %L:"
1434 " %s", comp
->name
, &cons
->expr
->where
, err
);
1439 if (!comp
->attr
.pointer
|| comp
->attr
.proc_pointer
1440 || cons
->expr
->expr_type
== EXPR_NULL
)
1443 a
= gfc_expr_attr (cons
->expr
);
1445 if (!a
.pointer
&& !a
.target
)
1448 gfc_error ("The element in the structure constructor at %L, "
1449 "for pointer component %qs should be a POINTER or "
1450 "a TARGET", &cons
->expr
->where
, comp
->name
);
1455 /* F08:C461. Additional checks for pointer initialization. */
1459 gfc_error ("Pointer initialization target at %L "
1460 "must not be ALLOCATABLE", &cons
->expr
->where
);
1465 gfc_error ("Pointer initialization target at %L "
1466 "must have the SAVE attribute", &cons
->expr
->where
);
1470 /* F2003, C1272 (3). */
1471 bool impure
= cons
->expr
->expr_type
== EXPR_VARIABLE
1472 && (gfc_impure_variable (cons
->expr
->symtree
->n
.sym
)
1473 || gfc_is_coindexed (cons
->expr
));
1474 if (impure
&& gfc_pure (NULL
))
1477 gfc_error ("Invalid expression in the structure constructor for "
1478 "pointer component %qs at %L in PURE procedure",
1479 comp
->name
, &cons
->expr
->where
);
1483 gfc_unset_implicit_pure (NULL
);
1490 /****************** Expression name resolution ******************/
1492 /* Returns 0 if a symbol was not declared with a type or
1493 attribute declaration statement, nonzero otherwise. */
1496 was_declared (gfc_symbol
*sym
)
1502 if (!a
.implicit_type
&& sym
->ts
.type
!= BT_UNKNOWN
)
1505 if (a
.allocatable
|| a
.dimension
|| a
.dummy
|| a
.external
|| a
.intrinsic
1506 || a
.optional
|| a
.pointer
|| a
.save
|| a
.target
|| a
.volatile_
1507 || a
.value
|| a
.access
!= ACCESS_UNKNOWN
|| a
.intent
!= INTENT_UNKNOWN
1508 || a
.asynchronous
|| a
.codimension
)
1515 /* Determine if a symbol is generic or not. */
1518 generic_sym (gfc_symbol
*sym
)
1522 if (sym
->attr
.generic
||
1523 (sym
->attr
.intrinsic
&& gfc_generic_intrinsic (sym
->name
)))
1526 if (was_declared (sym
) || sym
->ns
->parent
== NULL
)
1529 gfc_find_symbol (sym
->name
, sym
->ns
->parent
, 1, &s
);
1536 return generic_sym (s
);
1543 /* Determine if a symbol is specific or not. */
1546 specific_sym (gfc_symbol
*sym
)
1550 if (sym
->attr
.if_source
== IFSRC_IFBODY
1551 || sym
->attr
.proc
== PROC_MODULE
1552 || sym
->attr
.proc
== PROC_INTERNAL
1553 || sym
->attr
.proc
== PROC_ST_FUNCTION
1554 || (sym
->attr
.intrinsic
&& gfc_specific_intrinsic (sym
->name
))
1555 || sym
->attr
.external
)
1558 if (was_declared (sym
) || sym
->ns
->parent
== NULL
)
1561 gfc_find_symbol (sym
->name
, sym
->ns
->parent
, 1, &s
);
1563 return (s
== NULL
) ? 0 : specific_sym (s
);
1567 /* Figure out if the procedure is specific, generic or unknown. */
1570 { PTYPE_GENERIC
= 1, PTYPE_SPECIFIC
, PTYPE_UNKNOWN
};
1573 procedure_kind (gfc_symbol
*sym
)
1575 if (generic_sym (sym
))
1576 return PTYPE_GENERIC
;
1578 if (specific_sym (sym
))
1579 return PTYPE_SPECIFIC
;
1581 return PTYPE_UNKNOWN
;
1584 /* Check references to assumed size arrays. The flag need_full_assumed_size
1585 is nonzero when matching actual arguments. */
1587 static int need_full_assumed_size
= 0;
1590 check_assumed_size_reference (gfc_symbol
*sym
, gfc_expr
*e
)
1592 if (need_full_assumed_size
|| !(sym
->as
&& sym
->as
->type
== AS_ASSUMED_SIZE
))
1595 /* FIXME: The comparison "e->ref->u.ar.type == AR_FULL" is wrong.
1596 What should it be? */
1597 if (e
->ref
&& (e
->ref
->u
.ar
.end
[e
->ref
->u
.ar
.as
->rank
- 1] == NULL
)
1598 && (e
->ref
->u
.ar
.as
->type
== AS_ASSUMED_SIZE
)
1599 && (e
->ref
->u
.ar
.type
== AR_FULL
))
1601 gfc_error ("The upper bound in the last dimension must "
1602 "appear in the reference to the assumed size "
1603 "array %qs at %L", sym
->name
, &e
->where
);
1610 /* Look for bad assumed size array references in argument expressions
1611 of elemental and array valued intrinsic procedures. Since this is
1612 called from procedure resolution functions, it only recurses at
1616 resolve_assumed_size_actual (gfc_expr
*e
)
1621 switch (e
->expr_type
)
1624 if (e
->symtree
&& check_assumed_size_reference (e
->symtree
->n
.sym
, e
))
1629 if (resolve_assumed_size_actual (e
->value
.op
.op1
)
1630 || resolve_assumed_size_actual (e
->value
.op
.op2
))
1641 /* Check a generic procedure, passed as an actual argument, to see if
1642 there is a matching specific name. If none, it is an error, and if
1643 more than one, the reference is ambiguous. */
1645 count_specific_procs (gfc_expr
*e
)
1652 sym
= e
->symtree
->n
.sym
;
1654 for (p
= sym
->generic
; p
; p
= p
->next
)
1655 if (strcmp (sym
->name
, p
->sym
->name
) == 0)
1657 e
->symtree
= gfc_find_symtree (p
->sym
->ns
->sym_root
,
1663 gfc_error ("%qs at %L is ambiguous", e
->symtree
->n
.sym
->name
,
1667 gfc_error ("GENERIC procedure %qs is not allowed as an actual "
1668 "argument at %L", sym
->name
, &e
->where
);
1674 /* See if a call to sym could possibly be a not allowed RECURSION because of
1675 a missing RECURSIVE declaration. This means that either sym is the current
1676 context itself, or sym is the parent of a contained procedure calling its
1677 non-RECURSIVE containing procedure.
1678 This also works if sym is an ENTRY. */
1681 is_illegal_recursion (gfc_symbol
* sym
, gfc_namespace
* context
)
1683 gfc_symbol
* proc_sym
;
1684 gfc_symbol
* context_proc
;
1685 gfc_namespace
* real_context
;
1687 if (sym
->attr
.flavor
== FL_PROGRAM
1688 || gfc_fl_struct (sym
->attr
.flavor
))
1691 /* If we've got an ENTRY, find real procedure. */
1692 if (sym
->attr
.entry
&& sym
->ns
->entries
)
1693 proc_sym
= sym
->ns
->entries
->sym
;
1697 /* If sym is RECURSIVE, all is well of course. */
1698 if (proc_sym
->attr
.recursive
|| flag_recursive
)
1701 /* Find the context procedure's "real" symbol if it has entries.
1702 We look for a procedure symbol, so recurse on the parents if we don't
1703 find one (like in case of a BLOCK construct). */
1704 for (real_context
= context
; ; real_context
= real_context
->parent
)
1706 /* We should find something, eventually! */
1707 gcc_assert (real_context
);
1709 context_proc
= (real_context
->entries
? real_context
->entries
->sym
1710 : real_context
->proc_name
);
1712 /* In some special cases, there may not be a proc_name, like for this
1714 real(bad_kind()) function foo () ...
1715 when checking the call to bad_kind ().
1716 In these cases, we simply return here and assume that the
1721 if (context_proc
->attr
.flavor
!= FL_LABEL
)
1725 /* A call from sym's body to itself is recursion, of course. */
1726 if (context_proc
== proc_sym
)
1729 /* The same is true if context is a contained procedure and sym the
1731 if (context_proc
->attr
.contained
)
1733 gfc_symbol
* parent_proc
;
1735 gcc_assert (context
->parent
);
1736 parent_proc
= (context
->parent
->entries
? context
->parent
->entries
->sym
1737 : context
->parent
->proc_name
);
1739 if (parent_proc
== proc_sym
)
1747 /* Resolve an intrinsic procedure: Set its function/subroutine attribute,
1748 its typespec and formal argument list. */
1751 gfc_resolve_intrinsic (gfc_symbol
*sym
, locus
*loc
)
1753 gfc_intrinsic_sym
* isym
= NULL
;
1759 /* Already resolved. */
1760 if (sym
->from_intmod
&& sym
->ts
.type
!= BT_UNKNOWN
)
1763 /* We already know this one is an intrinsic, so we don't call
1764 gfc_is_intrinsic for full checking but rather use gfc_find_function and
1765 gfc_find_subroutine directly to check whether it is a function or
1768 if (sym
->intmod_sym_id
&& sym
->attr
.subroutine
)
1770 gfc_isym_id id
= gfc_isym_id_by_intmod_sym (sym
);
1771 isym
= gfc_intrinsic_subroutine_by_id (id
);
1773 else if (sym
->intmod_sym_id
)
1775 gfc_isym_id id
= gfc_isym_id_by_intmod_sym (sym
);
1776 isym
= gfc_intrinsic_function_by_id (id
);
1778 else if (!sym
->attr
.subroutine
)
1779 isym
= gfc_find_function (sym
->name
);
1781 if (isym
&& !sym
->attr
.subroutine
)
1783 if (sym
->ts
.type
!= BT_UNKNOWN
&& warn_surprising
1784 && !sym
->attr
.implicit_type
)
1785 gfc_warning (OPT_Wsurprising
,
1786 "Type specified for intrinsic function %qs at %L is"
1787 " ignored", sym
->name
, &sym
->declared_at
);
1789 if (!sym
->attr
.function
&&
1790 !gfc_add_function(&sym
->attr
, sym
->name
, loc
))
1795 else if (isym
|| (isym
= gfc_find_subroutine (sym
->name
)))
1797 if (sym
->ts
.type
!= BT_UNKNOWN
&& !sym
->attr
.implicit_type
)
1799 gfc_error ("Intrinsic subroutine %qs at %L shall not have a type"
1800 " specifier", sym
->name
, &sym
->declared_at
);
1804 if (!sym
->attr
.subroutine
&&
1805 !gfc_add_subroutine(&sym
->attr
, sym
->name
, loc
))
1810 gfc_error ("%qs declared INTRINSIC at %L does not exist", sym
->name
,
1815 gfc_copy_formal_args_intr (sym
, isym
, NULL
);
1817 sym
->attr
.pure
= isym
->pure
;
1818 sym
->attr
.elemental
= isym
->elemental
;
1820 /* Check it is actually available in the standard settings. */
1821 if (!gfc_check_intrinsic_standard (isym
, &symstd
, false, sym
->declared_at
))
1823 gfc_error ("The intrinsic %qs declared INTRINSIC at %L is not "
1824 "available in the current standard settings but %s. Use "
1825 "an appropriate %<-std=*%> option or enable "
1826 "%<-fall-intrinsics%> in order to use it.",
1827 sym
->name
, &sym
->declared_at
, symstd
);
1835 /* Resolve a procedure expression, like passing it to a called procedure or as
1836 RHS for a procedure pointer assignment. */
1839 resolve_procedure_expression (gfc_expr
* expr
)
1843 if (expr
->expr_type
!= EXPR_VARIABLE
)
1845 gcc_assert (expr
->symtree
);
1847 sym
= expr
->symtree
->n
.sym
;
1849 if (sym
->attr
.intrinsic
)
1850 gfc_resolve_intrinsic (sym
, &expr
->where
);
1852 if (sym
->attr
.flavor
!= FL_PROCEDURE
1853 || (sym
->attr
.function
&& sym
->result
== sym
))
1856 /* A non-RECURSIVE procedure that is used as procedure expression within its
1857 own body is in danger of being called recursively. */
1858 if (is_illegal_recursion (sym
, gfc_current_ns
))
1859 gfc_warning (0, "Non-RECURSIVE procedure %qs at %L is possibly calling"
1860 " itself recursively. Declare it RECURSIVE or use"
1861 " %<-frecursive%>", sym
->name
, &expr
->where
);
1867 /* Check that name is not a derived type. */
1870 is_dt_name (const char *name
)
1872 gfc_symbol
*dt_list
, *dt_first
;
1874 dt_list
= dt_first
= gfc_derived_types
;
1875 for (; dt_list
; dt_list
= dt_list
->dt_next
)
1877 if (strcmp(dt_list
->name
, name
) == 0)
1879 if (dt_first
== dt_list
->dt_next
)
1886 /* Resolve an actual argument list. Most of the time, this is just
1887 resolving the expressions in the list.
1888 The exception is that we sometimes have to decide whether arguments
1889 that look like procedure arguments are really simple variable
1893 resolve_actual_arglist (gfc_actual_arglist
*arg
, procedure_type ptype
,
1894 bool no_formal_args
)
1897 gfc_symtree
*parent_st
;
1899 gfc_component
*comp
;
1900 int save_need_full_assumed_size
;
1901 bool return_value
= false;
1902 bool actual_arg_sav
= actual_arg
, first_actual_arg_sav
= first_actual_arg
;
1905 first_actual_arg
= true;
1907 for (; arg
; arg
= arg
->next
)
1912 /* Check the label is a valid branching target. */
1915 if (arg
->label
->defined
== ST_LABEL_UNKNOWN
)
1917 gfc_error ("Label %d referenced at %L is never defined",
1918 arg
->label
->value
, &arg
->label
->where
);
1922 first_actual_arg
= false;
1926 if (e
->expr_type
== EXPR_VARIABLE
1927 && e
->symtree
->n
.sym
->attr
.generic
1929 && count_specific_procs (e
) != 1)
1932 if (e
->ts
.type
!= BT_PROCEDURE
)
1934 save_need_full_assumed_size
= need_full_assumed_size
;
1935 if (e
->expr_type
!= EXPR_VARIABLE
)
1936 need_full_assumed_size
= 0;
1937 if (!gfc_resolve_expr (e
))
1939 need_full_assumed_size
= save_need_full_assumed_size
;
1943 /* See if the expression node should really be a variable reference. */
1945 sym
= e
->symtree
->n
.sym
;
1947 if (sym
->attr
.flavor
== FL_PROCEDURE
&& is_dt_name (sym
->name
))
1949 gfc_error ("Derived type %qs is used as an actual "
1950 "argument at %L", sym
->name
, &e
->where
);
1954 if (sym
->attr
.flavor
== FL_PROCEDURE
1955 || sym
->attr
.intrinsic
1956 || sym
->attr
.external
)
1960 /* If a procedure is not already determined to be something else
1961 check if it is intrinsic. */
1962 if (gfc_is_intrinsic (sym
, sym
->attr
.subroutine
, e
->where
))
1963 sym
->attr
.intrinsic
= 1;
1965 if (sym
->attr
.proc
== PROC_ST_FUNCTION
)
1967 gfc_error ("Statement function %qs at %L is not allowed as an "
1968 "actual argument", sym
->name
, &e
->where
);
1971 actual_ok
= gfc_intrinsic_actual_ok (sym
->name
,
1972 sym
->attr
.subroutine
);
1973 if (sym
->attr
.intrinsic
&& actual_ok
== 0)
1975 gfc_error ("Intrinsic %qs at %L is not allowed as an "
1976 "actual argument", sym
->name
, &e
->where
);
1979 if (sym
->attr
.contained
&& !sym
->attr
.use_assoc
1980 && sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
)
1982 if (!gfc_notify_std (GFC_STD_F2008
, "Internal procedure %qs is"
1983 " used as actual argument at %L",
1984 sym
->name
, &e
->where
))
1988 if (sym
->attr
.elemental
&& !sym
->attr
.intrinsic
)
1990 gfc_error ("ELEMENTAL non-INTRINSIC procedure %qs is not "
1991 "allowed as an actual argument at %L", sym
->name
,
1995 /* Check if a generic interface has a specific procedure
1996 with the same name before emitting an error. */
1997 if (sym
->attr
.generic
&& count_specific_procs (e
) != 1)
2000 /* Just in case a specific was found for the expression. */
2001 sym
= e
->symtree
->n
.sym
;
2003 /* If the symbol is the function that names the current (or
2004 parent) scope, then we really have a variable reference. */
2006 if (gfc_is_function_return_value (sym
, sym
->ns
))
2009 /* If all else fails, see if we have a specific intrinsic. */
2010 if (sym
->ts
.type
== BT_UNKNOWN
&& sym
->attr
.intrinsic
)
2012 gfc_intrinsic_sym
*isym
;
2014 isym
= gfc_find_function (sym
->name
);
2015 if (isym
== NULL
|| !isym
->specific
)
2017 gfc_error ("Unable to find a specific INTRINSIC procedure "
2018 "for the reference %qs at %L", sym
->name
,
2023 sym
->attr
.intrinsic
= 1;
2024 sym
->attr
.function
= 1;
2027 if (!gfc_resolve_expr (e
))
2032 /* See if the name is a module procedure in a parent unit. */
2034 if (was_declared (sym
) || sym
->ns
->parent
== NULL
)
2037 if (gfc_find_sym_tree (sym
->name
, sym
->ns
->parent
, 1, &parent_st
))
2039 gfc_error ("Symbol %qs at %L is ambiguous", sym
->name
, &e
->where
);
2043 if (parent_st
== NULL
)
2046 sym
= parent_st
->n
.sym
;
2047 e
->symtree
= parent_st
; /* Point to the right thing. */
2049 if (sym
->attr
.flavor
== FL_PROCEDURE
2050 || sym
->attr
.intrinsic
2051 || sym
->attr
.external
)
2053 if (!gfc_resolve_expr (e
))
2059 e
->expr_type
= EXPR_VARIABLE
;
2061 if ((sym
->as
!= NULL
&& sym
->ts
.type
!= BT_CLASS
)
2062 || (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
2063 && CLASS_DATA (sym
)->as
))
2065 e
->rank
= sym
->ts
.type
== BT_CLASS
2066 ? CLASS_DATA (sym
)->as
->rank
: sym
->as
->rank
;
2067 e
->ref
= gfc_get_ref ();
2068 e
->ref
->type
= REF_ARRAY
;
2069 e
->ref
->u
.ar
.type
= AR_FULL
;
2070 e
->ref
->u
.ar
.as
= sym
->ts
.type
== BT_CLASS
2071 ? CLASS_DATA (sym
)->as
: sym
->as
;
2074 /* Expressions are assigned a default ts.type of BT_PROCEDURE in
2075 primary.c (match_actual_arg). If above code determines that it
2076 is a variable instead, it needs to be resolved as it was not
2077 done at the beginning of this function. */
2078 save_need_full_assumed_size
= need_full_assumed_size
;
2079 if (e
->expr_type
!= EXPR_VARIABLE
)
2080 need_full_assumed_size
= 0;
2081 if (!gfc_resolve_expr (e
))
2083 need_full_assumed_size
= save_need_full_assumed_size
;
2086 /* Check argument list functions %VAL, %LOC and %REF. There is
2087 nothing to do for %REF. */
2088 if (arg
->name
&& arg
->name
[0] == '%')
2090 if (strcmp ("%VAL", arg
->name
) == 0)
2092 if (e
->ts
.type
== BT_CHARACTER
|| e
->ts
.type
== BT_DERIVED
)
2094 gfc_error ("By-value argument at %L is not of numeric "
2101 gfc_error ("By-value argument at %L cannot be an array or "
2102 "an array section", &e
->where
);
2106 /* Intrinsics are still PROC_UNKNOWN here. However,
2107 since same file external procedures are not resolvable
2108 in gfortran, it is a good deal easier to leave them to
2110 if (ptype
!= PROC_UNKNOWN
2111 && ptype
!= PROC_DUMMY
2112 && ptype
!= PROC_EXTERNAL
2113 && ptype
!= PROC_MODULE
)
2115 gfc_error ("By-value argument at %L is not allowed "
2116 "in this context", &e
->where
);
2121 /* Statement functions have already been excluded above. */
2122 else if (strcmp ("%LOC", arg
->name
) == 0
2123 && e
->ts
.type
== BT_PROCEDURE
)
2125 if (e
->symtree
->n
.sym
->attr
.proc
== PROC_INTERNAL
)
2127 gfc_error ("Passing internal procedure at %L by location "
2128 "not allowed", &e
->where
);
2134 comp
= gfc_get_proc_ptr_comp(e
);
2135 if (e
->expr_type
== EXPR_VARIABLE
2136 && comp
&& comp
->attr
.elemental
)
2138 gfc_error ("ELEMENTAL procedure pointer component %qs is not "
2139 "allowed as an actual argument at %L", comp
->name
,
2143 /* Fortran 2008, C1237. */
2144 if (e
->expr_type
== EXPR_VARIABLE
&& gfc_is_coindexed (e
)
2145 && gfc_has_ultimate_pointer (e
))
2147 gfc_error ("Coindexed actual argument at %L with ultimate pointer "
2148 "component", &e
->where
);
2152 first_actual_arg
= false;
2155 return_value
= true;
2158 actual_arg
= actual_arg_sav
;
2159 first_actual_arg
= first_actual_arg_sav
;
2161 return return_value
;
2165 /* Do the checks of the actual argument list that are specific to elemental
2166 procedures. If called with c == NULL, we have a function, otherwise if
2167 expr == NULL, we have a subroutine. */
2170 resolve_elemental_actual (gfc_expr
*expr
, gfc_code
*c
)
2172 gfc_actual_arglist
*arg0
;
2173 gfc_actual_arglist
*arg
;
2174 gfc_symbol
*esym
= NULL
;
2175 gfc_intrinsic_sym
*isym
= NULL
;
2177 gfc_intrinsic_arg
*iformal
= NULL
;
2178 gfc_formal_arglist
*eformal
= NULL
;
2179 bool formal_optional
= false;
2180 bool set_by_optional
= false;
2184 /* Is this an elemental procedure? */
2185 if (expr
&& expr
->value
.function
.actual
!= NULL
)
2187 if (expr
->value
.function
.esym
!= NULL
2188 && expr
->value
.function
.esym
->attr
.elemental
)
2190 arg0
= expr
->value
.function
.actual
;
2191 esym
= expr
->value
.function
.esym
;
2193 else if (expr
->value
.function
.isym
!= NULL
2194 && expr
->value
.function
.isym
->elemental
)
2196 arg0
= expr
->value
.function
.actual
;
2197 isym
= expr
->value
.function
.isym
;
2202 else if (c
&& c
->ext
.actual
!= NULL
)
2204 arg0
= c
->ext
.actual
;
2206 if (c
->resolved_sym
)
2207 esym
= c
->resolved_sym
;
2209 esym
= c
->symtree
->n
.sym
;
2212 if (!esym
->attr
.elemental
)
2218 /* The rank of an elemental is the rank of its array argument(s). */
2219 for (arg
= arg0
; arg
; arg
= arg
->next
)
2221 if (arg
->expr
!= NULL
&& arg
->expr
->rank
!= 0)
2223 rank
= arg
->expr
->rank
;
2224 if (arg
->expr
->expr_type
== EXPR_VARIABLE
2225 && arg
->expr
->symtree
->n
.sym
->attr
.optional
)
2226 set_by_optional
= true;
2228 /* Function specific; set the result rank and shape. */
2232 if (!expr
->shape
&& arg
->expr
->shape
)
2234 expr
->shape
= gfc_get_shape (rank
);
2235 for (i
= 0; i
< rank
; i
++)
2236 mpz_init_set (expr
->shape
[i
], arg
->expr
->shape
[i
]);
2243 /* If it is an array, it shall not be supplied as an actual argument
2244 to an elemental procedure unless an array of the same rank is supplied
2245 as an actual argument corresponding to a nonoptional dummy argument of
2246 that elemental procedure(12.4.1.5). */
2247 formal_optional
= false;
2249 iformal
= isym
->formal
;
2251 eformal
= esym
->formal
;
2253 for (arg
= arg0
; arg
; arg
= arg
->next
)
2257 if (eformal
->sym
&& eformal
->sym
->attr
.optional
)
2258 formal_optional
= true;
2259 eformal
= eformal
->next
;
2261 else if (isym
&& iformal
)
2263 if (iformal
->optional
)
2264 formal_optional
= true;
2265 iformal
= iformal
->next
;
2268 formal_optional
= true;
2270 if (pedantic
&& arg
->expr
!= NULL
2271 && arg
->expr
->expr_type
== EXPR_VARIABLE
2272 && arg
->expr
->symtree
->n
.sym
->attr
.optional
2275 && (set_by_optional
|| arg
->expr
->rank
!= rank
)
2276 && !(isym
&& isym
->id
== GFC_ISYM_CONVERSION
))
2278 gfc_warning (OPT_Wpedantic
,
2279 "%qs at %L is an array and OPTIONAL; IF IT IS "
2280 "MISSING, it cannot be the actual argument of an "
2281 "ELEMENTAL procedure unless there is a non-optional "
2282 "argument with the same rank (12.4.1.5)",
2283 arg
->expr
->symtree
->n
.sym
->name
, &arg
->expr
->where
);
2287 for (arg
= arg0
; arg
; arg
= arg
->next
)
2289 if (arg
->expr
== NULL
|| arg
->expr
->rank
== 0)
2292 /* Being elemental, the last upper bound of an assumed size array
2293 argument must be present. */
2294 if (resolve_assumed_size_actual (arg
->expr
))
2297 /* Elemental procedure's array actual arguments must conform. */
2300 if (!gfc_check_conformance (arg
->expr
, e
, "elemental procedure"))
2307 /* INTENT(OUT) is only allowed for subroutines; if any actual argument
2308 is an array, the intent inout/out variable needs to be also an array. */
2309 if (rank
> 0 && esym
&& expr
== NULL
)
2310 for (eformal
= esym
->formal
, arg
= arg0
; arg
&& eformal
;
2311 arg
= arg
->next
, eformal
= eformal
->next
)
2312 if ((eformal
->sym
->attr
.intent
== INTENT_OUT
2313 || eformal
->sym
->attr
.intent
== INTENT_INOUT
)
2314 && arg
->expr
&& arg
->expr
->rank
== 0)
2316 gfc_error ("Actual argument at %L for INTENT(%s) dummy %qs of "
2317 "ELEMENTAL subroutine %qs is a scalar, but another "
2318 "actual argument is an array", &arg
->expr
->where
,
2319 (eformal
->sym
->attr
.intent
== INTENT_OUT
) ? "OUT"
2320 : "INOUT", eformal
->sym
->name
, esym
->name
);
2327 /* This function does the checking of references to global procedures
2328 as defined in sections 18.1 and 14.1, respectively, of the Fortran
2329 77 and 95 standards. It checks for a gsymbol for the name, making
2330 one if it does not already exist. If it already exists, then the
2331 reference being resolved must correspond to the type of gsymbol.
2332 Otherwise, the new symbol is equipped with the attributes of the
2333 reference. The corresponding code that is called in creating
2334 global entities is parse.c.
2336 In addition, for all but -std=legacy, the gsymbols are used to
2337 check the interfaces of external procedures from the same file.
2338 The namespace of the gsymbol is resolved and then, once this is
2339 done the interface is checked. */
2343 not_in_recursive (gfc_symbol
*sym
, gfc_namespace
*gsym_ns
)
2345 if (!gsym_ns
->proc_name
->attr
.recursive
)
2348 if (sym
->ns
== gsym_ns
)
2351 if (sym
->ns
->parent
&& sym
->ns
->parent
== gsym_ns
)
2358 not_entry_self_reference (gfc_symbol
*sym
, gfc_namespace
*gsym_ns
)
2360 if (gsym_ns
->entries
)
2362 gfc_entry_list
*entry
= gsym_ns
->entries
;
2364 for (; entry
; entry
= entry
->next
)
2366 if (strcmp (sym
->name
, entry
->sym
->name
) == 0)
2368 if (strcmp (gsym_ns
->proc_name
->name
,
2369 sym
->ns
->proc_name
->name
) == 0)
2373 && strcmp (gsym_ns
->proc_name
->name
,
2374 sym
->ns
->parent
->proc_name
->name
) == 0)
2383 /* Check for the requirement of an explicit interface. F08:12.4.2.2. */
2386 gfc_explicit_interface_required (gfc_symbol
*sym
, char *errmsg
, int err_len
)
2388 gfc_formal_arglist
*arg
= gfc_sym_get_dummy_args (sym
);
2390 for ( ; arg
; arg
= arg
->next
)
2395 if (arg
->sym
->attr
.allocatable
) /* (2a) */
2397 strncpy (errmsg
, _("allocatable argument"), err_len
);
2400 else if (arg
->sym
->attr
.asynchronous
)
2402 strncpy (errmsg
, _("asynchronous argument"), err_len
);
2405 else if (arg
->sym
->attr
.optional
)
2407 strncpy (errmsg
, _("optional argument"), err_len
);
2410 else if (arg
->sym
->attr
.pointer
)
2412 strncpy (errmsg
, _("pointer argument"), err_len
);
2415 else if (arg
->sym
->attr
.target
)
2417 strncpy (errmsg
, _("target argument"), err_len
);
2420 else if (arg
->sym
->attr
.value
)
2422 strncpy (errmsg
, _("value argument"), err_len
);
2425 else if (arg
->sym
->attr
.volatile_
)
2427 strncpy (errmsg
, _("volatile argument"), err_len
);
2430 else if (arg
->sym
->as
&& arg
->sym
->as
->type
== AS_ASSUMED_SHAPE
) /* (2b) */
2432 strncpy (errmsg
, _("assumed-shape argument"), err_len
);
2435 else if (arg
->sym
->as
&& arg
->sym
->as
->type
== AS_ASSUMED_RANK
) /* TS 29113, 6.2. */
2437 strncpy (errmsg
, _("assumed-rank argument"), err_len
);
2440 else if (arg
->sym
->attr
.codimension
) /* (2c) */
2442 strncpy (errmsg
, _("coarray argument"), err_len
);
2445 else if (false) /* (2d) TODO: parametrized derived type */
2447 strncpy (errmsg
, _("parametrized derived type argument"), err_len
);
2450 else if (arg
->sym
->ts
.type
== BT_CLASS
) /* (2e) */
2452 strncpy (errmsg
, _("polymorphic argument"), err_len
);
2455 else if (arg
->sym
->attr
.ext_attr
& (1 << EXT_ATTR_NO_ARG_CHECK
))
2457 strncpy (errmsg
, _("NO_ARG_CHECK attribute"), err_len
);
2460 else if (arg
->sym
->ts
.type
== BT_ASSUMED
)
2462 /* As assumed-type is unlimited polymorphic (cf. above).
2463 See also TS 29113, Note 6.1. */
2464 strncpy (errmsg
, _("assumed-type argument"), err_len
);
2469 if (sym
->attr
.function
)
2471 gfc_symbol
*res
= sym
->result
? sym
->result
: sym
;
2473 if (res
->attr
.dimension
) /* (3a) */
2475 strncpy (errmsg
, _("array result"), err_len
);
2478 else if (res
->attr
.pointer
|| res
->attr
.allocatable
) /* (3b) */
2480 strncpy (errmsg
, _("pointer or allocatable result"), err_len
);
2483 else if (res
->ts
.type
== BT_CHARACTER
&& res
->ts
.u
.cl
2484 && res
->ts
.u
.cl
->length
2485 && res
->ts
.u
.cl
->length
->expr_type
!= EXPR_CONSTANT
) /* (3c) */
2487 strncpy (errmsg
, _("result with non-constant character length"), err_len
);
2492 if (sym
->attr
.elemental
&& !sym
->attr
.intrinsic
) /* (4) */
2494 strncpy (errmsg
, _("elemental procedure"), err_len
);
2497 else if (sym
->attr
.is_bind_c
) /* (5) */
2499 strncpy (errmsg
, _("bind(c) procedure"), err_len
);
2508 resolve_global_procedure (gfc_symbol
*sym
, locus
*where
, int sub
)
2512 enum gfc_symbol_type type
;
2515 type
= sub
? GSYM_SUBROUTINE
: GSYM_FUNCTION
;
2517 gsym
= gfc_get_gsymbol (sym
->binding_label
? sym
->binding_label
: sym
->name
,
2518 sym
->binding_label
!= NULL
);
2520 if ((gsym
->type
!= GSYM_UNKNOWN
&& gsym
->type
!= type
))
2521 gfc_global_used (gsym
, where
);
2523 if ((sym
->attr
.if_source
== IFSRC_UNKNOWN
2524 || sym
->attr
.if_source
== IFSRC_IFBODY
)
2525 && gsym
->type
!= GSYM_UNKNOWN
2526 && !gsym
->binding_label
2528 && gsym
->ns
->proc_name
2529 && not_in_recursive (sym
, gsym
->ns
)
2530 && not_entry_self_reference (sym
, gsym
->ns
))
2532 gfc_symbol
*def_sym
;
2533 def_sym
= gsym
->ns
->proc_name
;
2535 if (gsym
->ns
->resolved
!= -1)
2538 /* Resolve the gsymbol namespace if needed. */
2539 if (!gsym
->ns
->resolved
)
2541 gfc_symbol
*old_dt_list
;
2543 /* Stash away derived types so that the backend_decls
2544 do not get mixed up. */
2545 old_dt_list
= gfc_derived_types
;
2546 gfc_derived_types
= NULL
;
2548 gfc_resolve (gsym
->ns
);
2550 /* Store the new derived types with the global namespace. */
2551 if (gfc_derived_types
)
2552 gsym
->ns
->derived_types
= gfc_derived_types
;
2554 /* Restore the derived types of this namespace. */
2555 gfc_derived_types
= old_dt_list
;
2558 /* Make sure that translation for the gsymbol occurs before
2559 the procedure currently being resolved. */
2560 ns
= gfc_global_ns_list
;
2561 for (; ns
&& ns
!= gsym
->ns
; ns
= ns
->sibling
)
2563 if (ns
->sibling
== gsym
->ns
)
2565 ns
->sibling
= gsym
->ns
->sibling
;
2566 gsym
->ns
->sibling
= gfc_global_ns_list
;
2567 gfc_global_ns_list
= gsym
->ns
;
2572 /* This can happen if a binding name has been specified. */
2573 if (gsym
->binding_label
&& gsym
->sym_name
!= def_sym
->name
)
2574 gfc_find_symbol (gsym
->sym_name
, gsym
->ns
, 0, &def_sym
);
2576 if (def_sym
->attr
.entry_master
|| def_sym
->attr
.entry
)
2578 gfc_entry_list
*entry
;
2579 for (entry
= gsym
->ns
->entries
; entry
; entry
= entry
->next
)
2580 if (strcmp (entry
->sym
->name
, sym
->name
) == 0)
2582 def_sym
= entry
->sym
;
2588 if (sym
->attr
.function
&& !gfc_compare_types (&sym
->ts
, &def_sym
->ts
))
2590 gfc_error ("Return type mismatch of function %qs at %L (%s/%s)",
2591 sym
->name
, &sym
->declared_at
, gfc_typename (&sym
->ts
),
2592 gfc_typename (&def_sym
->ts
));
2596 if (sym
->attr
.if_source
== IFSRC_UNKNOWN
2597 && gfc_explicit_interface_required (def_sym
, reason
, sizeof(reason
)))
2599 gfc_error ("Explicit interface required for %qs at %L: %s",
2600 sym
->name
, &sym
->declared_at
, reason
);
2604 if (!pedantic
&& (gfc_option
.allow_std
& GFC_STD_GNU
))
2605 /* Turn erros into warnings with -std=gnu and -std=legacy. */
2606 gfc_errors_to_warnings (true);
2608 if (!gfc_compare_interfaces (sym
, def_sym
, sym
->name
, 0, 1,
2609 reason
, sizeof(reason
), NULL
, NULL
))
2611 gfc_error_opt (0, "Interface mismatch in global procedure %qs at %L:"
2612 " %s", sym
->name
, &sym
->declared_at
, reason
);
2618 gfc_errors_to_warnings (false);
2620 if (gsym
->type
== GSYM_UNKNOWN
)
2623 gsym
->where
= *where
;
2630 /************* Function resolution *************/
2632 /* Resolve a function call known to be generic.
2633 Section 14.1.2.4.1. */
2636 resolve_generic_f0 (gfc_expr
*expr
, gfc_symbol
*sym
)
2640 if (sym
->attr
.generic
)
2642 s
= gfc_search_interface (sym
->generic
, 0, &expr
->value
.function
.actual
);
2645 expr
->value
.function
.name
= s
->name
;
2646 expr
->value
.function
.esym
= s
;
2648 if (s
->ts
.type
!= BT_UNKNOWN
)
2650 else if (s
->result
!= NULL
&& s
->result
->ts
.type
!= BT_UNKNOWN
)
2651 expr
->ts
= s
->result
->ts
;
2654 expr
->rank
= s
->as
->rank
;
2655 else if (s
->result
!= NULL
&& s
->result
->as
!= NULL
)
2656 expr
->rank
= s
->result
->as
->rank
;
2658 gfc_set_sym_referenced (expr
->value
.function
.esym
);
2663 /* TODO: Need to search for elemental references in generic
2667 if (sym
->attr
.intrinsic
)
2668 return gfc_intrinsic_func_interface (expr
, 0);
2675 resolve_generic_f (gfc_expr
*expr
)
2679 gfc_interface
*intr
= NULL
;
2681 sym
= expr
->symtree
->n
.sym
;
2685 m
= resolve_generic_f0 (expr
, sym
);
2688 else if (m
== MATCH_ERROR
)
2693 for (intr
= sym
->generic
; intr
; intr
= intr
->next
)
2694 if (gfc_fl_struct (intr
->sym
->attr
.flavor
))
2697 if (sym
->ns
->parent
== NULL
)
2699 gfc_find_symbol (sym
->name
, sym
->ns
->parent
, 1, &sym
);
2703 if (!generic_sym (sym
))
2707 /* Last ditch attempt. See if the reference is to an intrinsic
2708 that possesses a matching interface. 14.1.2.4 */
2709 if (sym
&& !intr
&& !gfc_is_intrinsic (sym
, 0, expr
->where
))
2711 if (gfc_init_expr_flag
)
2712 gfc_error ("Function %qs in initialization expression at %L "
2713 "must be an intrinsic function",
2714 expr
->symtree
->n
.sym
->name
, &expr
->where
);
2716 gfc_error ("There is no specific function for the generic %qs "
2717 "at %L", expr
->symtree
->n
.sym
->name
, &expr
->where
);
2723 if (!gfc_convert_to_structure_constructor (expr
, intr
->sym
, NULL
,
2726 if (!gfc_use_derived (expr
->ts
.u
.derived
))
2728 return resolve_structure_cons (expr
, 0);
2731 m
= gfc_intrinsic_func_interface (expr
, 0);
2736 gfc_error ("Generic function %qs at %L is not consistent with a "
2737 "specific intrinsic interface", expr
->symtree
->n
.sym
->name
,
2744 /* Resolve a function call known to be specific. */
2747 resolve_specific_f0 (gfc_symbol
*sym
, gfc_expr
*expr
)
2751 if (sym
->attr
.external
|| sym
->attr
.if_source
== IFSRC_IFBODY
)
2753 if (sym
->attr
.dummy
)
2755 sym
->attr
.proc
= PROC_DUMMY
;
2759 sym
->attr
.proc
= PROC_EXTERNAL
;
2763 if (sym
->attr
.proc
== PROC_MODULE
2764 || sym
->attr
.proc
== PROC_ST_FUNCTION
2765 || sym
->attr
.proc
== PROC_INTERNAL
)
2768 if (sym
->attr
.intrinsic
)
2770 m
= gfc_intrinsic_func_interface (expr
, 1);
2774 gfc_error ("Function %qs at %L is INTRINSIC but is not compatible "
2775 "with an intrinsic", sym
->name
, &expr
->where
);
2783 gfc_procedure_use (sym
, &expr
->value
.function
.actual
, &expr
->where
);
2786 expr
->ts
= sym
->result
->ts
;
2789 expr
->value
.function
.name
= sym
->name
;
2790 expr
->value
.function
.esym
= sym
;
2791 /* Prevent crash when sym->ts.u.derived->components is not set due to previous
2793 if (sym
->ts
.type
== BT_CLASS
&& !CLASS_DATA (sym
))
2795 if (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
)->as
)
2796 expr
->rank
= CLASS_DATA (sym
)->as
->rank
;
2797 else if (sym
->as
!= NULL
)
2798 expr
->rank
= sym
->as
->rank
;
2805 resolve_specific_f (gfc_expr
*expr
)
2810 sym
= expr
->symtree
->n
.sym
;
2814 m
= resolve_specific_f0 (sym
, expr
);
2817 if (m
== MATCH_ERROR
)
2820 if (sym
->ns
->parent
== NULL
)
2823 gfc_find_symbol (sym
->name
, sym
->ns
->parent
, 1, &sym
);
2829 gfc_error ("Unable to resolve the specific function %qs at %L",
2830 expr
->symtree
->n
.sym
->name
, &expr
->where
);
2835 /* Recursively append candidate SYM to CANDIDATES. Store the number of
2836 candidates in CANDIDATES_LEN. */
2839 lookup_function_fuzzy_find_candidates (gfc_symtree
*sym
,
2841 size_t &candidates_len
)
2847 if ((sym
->n
.sym
->ts
.type
!= BT_UNKNOWN
|| sym
->n
.sym
->attr
.external
)
2848 && sym
->n
.sym
->attr
.flavor
== FL_PROCEDURE
)
2849 vec_push (candidates
, candidates_len
, sym
->name
);
2853 lookup_function_fuzzy_find_candidates (p
, candidates
, candidates_len
);
2857 lookup_function_fuzzy_find_candidates (p
, candidates
, candidates_len
);
2861 /* Lookup function FN fuzzily, taking names in SYMROOT into account. */
2864 gfc_lookup_function_fuzzy (const char *fn
, gfc_symtree
*symroot
)
2866 char **candidates
= NULL
;
2867 size_t candidates_len
= 0;
2868 lookup_function_fuzzy_find_candidates (symroot
, candidates
, candidates_len
);
2869 return gfc_closest_fuzzy_match (fn
, candidates
);
2873 /* Resolve a procedure call not known to be generic nor specific. */
2876 resolve_unknown_f (gfc_expr
*expr
)
2881 sym
= expr
->symtree
->n
.sym
;
2883 if (sym
->attr
.dummy
)
2885 sym
->attr
.proc
= PROC_DUMMY
;
2886 expr
->value
.function
.name
= sym
->name
;
2890 /* See if we have an intrinsic function reference. */
2892 if (gfc_is_intrinsic (sym
, 0, expr
->where
))
2894 if (gfc_intrinsic_func_interface (expr
, 1) == MATCH_YES
)
2899 /* The reference is to an external name. */
2901 sym
->attr
.proc
= PROC_EXTERNAL
;
2902 expr
->value
.function
.name
= sym
->name
;
2903 expr
->value
.function
.esym
= expr
->symtree
->n
.sym
;
2905 if (sym
->as
!= NULL
)
2906 expr
->rank
= sym
->as
->rank
;
2908 /* Type of the expression is either the type of the symbol or the
2909 default type of the symbol. */
2912 gfc_procedure_use (sym
, &expr
->value
.function
.actual
, &expr
->where
);
2914 if (sym
->ts
.type
!= BT_UNKNOWN
)
2918 ts
= gfc_get_default_type (sym
->name
, sym
->ns
);
2920 if (ts
->type
== BT_UNKNOWN
)
2923 = gfc_lookup_function_fuzzy (sym
->name
, sym
->ns
->sym_root
);
2925 gfc_error ("Function %qs at %L has no IMPLICIT type"
2926 "; did you mean %qs?",
2927 sym
->name
, &expr
->where
, guessed
);
2929 gfc_error ("Function %qs at %L has no IMPLICIT type",
2930 sym
->name
, &expr
->where
);
2941 /* Return true, if the symbol is an external procedure. */
2943 is_external_proc (gfc_symbol
*sym
)
2945 if (!sym
->attr
.dummy
&& !sym
->attr
.contained
2946 && !gfc_is_intrinsic (sym
, sym
->attr
.subroutine
, sym
->declared_at
)
2947 && sym
->attr
.proc
!= PROC_ST_FUNCTION
2948 && !sym
->attr
.proc_pointer
2949 && !sym
->attr
.use_assoc
2957 /* Figure out if a function reference is pure or not. Also set the name
2958 of the function for a potential error message. Return nonzero if the
2959 function is PURE, zero if not. */
2961 pure_stmt_function (gfc_expr
*, gfc_symbol
*);
2964 gfc_pure_function (gfc_expr
*e
, const char **name
)
2967 gfc_component
*comp
;
2971 if (e
->symtree
!= NULL
2972 && e
->symtree
->n
.sym
!= NULL
2973 && e
->symtree
->n
.sym
->attr
.proc
== PROC_ST_FUNCTION
)
2974 return pure_stmt_function (e
, e
->symtree
->n
.sym
);
2976 comp
= gfc_get_proc_ptr_comp (e
);
2979 pure
= gfc_pure (comp
->ts
.interface
);
2982 else if (e
->value
.function
.esym
)
2984 pure
= gfc_pure (e
->value
.function
.esym
);
2985 *name
= e
->value
.function
.esym
->name
;
2987 else if (e
->value
.function
.isym
)
2989 pure
= e
->value
.function
.isym
->pure
2990 || e
->value
.function
.isym
->elemental
;
2991 *name
= e
->value
.function
.isym
->name
;
2995 /* Implicit functions are not pure. */
2997 *name
= e
->value
.function
.name
;
3004 /* Check if the expression is a reference to an implicitly pure function. */
3007 gfc_implicit_pure_function (gfc_expr
*e
)
3009 gfc_component
*comp
= gfc_get_proc_ptr_comp (e
);
3011 return gfc_implicit_pure (comp
->ts
.interface
);
3012 else if (e
->value
.function
.esym
)
3013 return gfc_implicit_pure (e
->value
.function
.esym
);
3020 impure_stmt_fcn (gfc_expr
*e
, gfc_symbol
*sym
,
3021 int *f ATTRIBUTE_UNUSED
)
3025 /* Don't bother recursing into other statement functions
3026 since they will be checked individually for purity. */
3027 if (e
->expr_type
!= EXPR_FUNCTION
3029 || e
->symtree
->n
.sym
== sym
3030 || e
->symtree
->n
.sym
->attr
.proc
== PROC_ST_FUNCTION
)
3033 return gfc_pure_function (e
, &name
) ? false : true;
3038 pure_stmt_function (gfc_expr
*e
, gfc_symbol
*sym
)
3040 return gfc_traverse_expr (e
, sym
, impure_stmt_fcn
, 0) ? 0 : 1;
3044 /* Check if an impure function is allowed in the current context. */
3046 static bool check_pure_function (gfc_expr
*e
)
3048 const char *name
= NULL
;
3049 if (!gfc_pure_function (e
, &name
) && name
)
3053 gfc_error ("Reference to impure function %qs at %L inside a "
3054 "FORALL %s", name
, &e
->where
,
3055 forall_flag
== 2 ? "mask" : "block");
3058 else if (gfc_do_concurrent_flag
)
3060 gfc_error ("Reference to impure function %qs at %L inside a "
3061 "DO CONCURRENT %s", name
, &e
->where
,
3062 gfc_do_concurrent_flag
== 2 ? "mask" : "block");
3065 else if (gfc_pure (NULL
))
3067 gfc_error ("Reference to impure function %qs at %L "
3068 "within a PURE procedure", name
, &e
->where
);
3071 if (!gfc_implicit_pure_function (e
))
3072 gfc_unset_implicit_pure (NULL
);
3078 /* Update current procedure's array_outer_dependency flag, considering
3079 a call to procedure SYM. */
3082 update_current_proc_array_outer_dependency (gfc_symbol
*sym
)
3084 /* Check to see if this is a sibling function that has not yet
3086 gfc_namespace
*sibling
= gfc_current_ns
->sibling
;
3087 for (; sibling
; sibling
= sibling
->sibling
)
3089 if (sibling
->proc_name
== sym
)
3091 gfc_resolve (sibling
);
3096 /* If SYM has references to outer arrays, so has the procedure calling
3097 SYM. If SYM is a procedure pointer, we can assume the worst. */
3098 if ((sym
->attr
.array_outer_dependency
|| sym
->attr
.proc_pointer
)
3099 && gfc_current_ns
->proc_name
)
3100 gfc_current_ns
->proc_name
->attr
.array_outer_dependency
= 1;
3104 /* Resolve a function call, which means resolving the arguments, then figuring
3105 out which entity the name refers to. */
3108 resolve_function (gfc_expr
*expr
)
3110 gfc_actual_arglist
*arg
;
3114 procedure_type p
= PROC_INTRINSIC
;
3115 bool no_formal_args
;
3119 sym
= expr
->symtree
->n
.sym
;
3121 /* If this is a procedure pointer component, it has already been resolved. */
3122 if (gfc_is_proc_ptr_comp (expr
))
3125 /* Avoid re-resolving the arguments of caf_get, which can lead to inserting
3127 if (sym
&& sym
->attr
.intrinsic
3128 && (sym
->intmod_sym_id
== GFC_ISYM_CAF_GET
3129 || sym
->intmod_sym_id
== GFC_ISYM_CAF_SEND
))
3132 if (sym
&& sym
->attr
.intrinsic
3133 && !gfc_resolve_intrinsic (sym
, &expr
->where
))
3136 if (sym
&& (sym
->attr
.flavor
== FL_VARIABLE
|| sym
->attr
.subroutine
))
3138 gfc_error ("%qs at %L is not a function", sym
->name
, &expr
->where
);
3142 /* If this is a deferred TBP with an abstract interface (which may
3143 of course be referenced), expr->value.function.esym will be set. */
3144 if (sym
&& sym
->attr
.abstract
&& !expr
->value
.function
.esym
)
3146 gfc_error ("ABSTRACT INTERFACE %qs must not be referenced at %L",
3147 sym
->name
, &expr
->where
);
3151 /* If this is a deferred TBP with an abstract interface, its result
3152 cannot be an assumed length character (F2003: C418). */
3153 if (sym
&& sym
->attr
.abstract
&& sym
->attr
.function
3154 && sym
->result
->ts
.u
.cl
3155 && sym
->result
->ts
.u
.cl
->length
== NULL
3156 && !sym
->result
->ts
.deferred
)
3158 gfc_error ("ABSTRACT INTERFACE %qs at %L must not have an assumed "
3159 "character length result (F2008: C418)", sym
->name
,
3164 /* Switch off assumed size checking and do this again for certain kinds
3165 of procedure, once the procedure itself is resolved. */
3166 need_full_assumed_size
++;
3168 if (expr
->symtree
&& expr
->symtree
->n
.sym
)
3169 p
= expr
->symtree
->n
.sym
->attr
.proc
;
3171 if (expr
->value
.function
.isym
&& expr
->value
.function
.isym
->inquiry
)
3172 inquiry_argument
= true;
3173 no_formal_args
= sym
&& is_external_proc (sym
)
3174 && gfc_sym_get_dummy_args (sym
) == NULL
;
3176 if (!resolve_actual_arglist (expr
->value
.function
.actual
,
3179 inquiry_argument
= false;
3183 inquiry_argument
= false;
3185 /* Resume assumed_size checking. */
3186 need_full_assumed_size
--;
3188 /* If the procedure is external, check for usage. */
3189 if (sym
&& is_external_proc (sym
))
3190 resolve_global_procedure (sym
, &expr
->where
, 0);
3192 if (sym
&& sym
->ts
.type
== BT_CHARACTER
3194 && sym
->ts
.u
.cl
->length
== NULL
3196 && !sym
->ts
.deferred
3197 && expr
->value
.function
.esym
== NULL
3198 && !sym
->attr
.contained
)
3200 /* Internal procedures are taken care of in resolve_contained_fntype. */
3201 gfc_error ("Function %qs is declared CHARACTER(*) and cannot "
3202 "be used at %L since it is not a dummy argument",
3203 sym
->name
, &expr
->where
);
3207 /* See if function is already resolved. */
3209 if (expr
->value
.function
.name
!= NULL
3210 || expr
->value
.function
.isym
!= NULL
)
3212 if (expr
->ts
.type
== BT_UNKNOWN
)
3218 /* Apply the rules of section 14.1.2. */
3220 switch (procedure_kind (sym
))
3223 t
= resolve_generic_f (expr
);
3226 case PTYPE_SPECIFIC
:
3227 t
= resolve_specific_f (expr
);
3231 t
= resolve_unknown_f (expr
);
3235 gfc_internal_error ("resolve_function(): bad function type");
3239 /* If the expression is still a function (it might have simplified),
3240 then we check to see if we are calling an elemental function. */
3242 if (expr
->expr_type
!= EXPR_FUNCTION
)
3245 temp
= need_full_assumed_size
;
3246 need_full_assumed_size
= 0;
3248 if (!resolve_elemental_actual (expr
, NULL
))
3251 if (omp_workshare_flag
3252 && expr
->value
.function
.esym
3253 && ! gfc_elemental (expr
->value
.function
.esym
))
3255 gfc_error ("User defined non-ELEMENTAL function %qs at %L not allowed "
3256 "in WORKSHARE construct", expr
->value
.function
.esym
->name
,
3261 #define GENERIC_ID expr->value.function.isym->id
3262 else if (expr
->value
.function
.actual
!= NULL
3263 && expr
->value
.function
.isym
!= NULL
3264 && GENERIC_ID
!= GFC_ISYM_LBOUND
3265 && GENERIC_ID
!= GFC_ISYM_LCOBOUND
3266 && GENERIC_ID
!= GFC_ISYM_UCOBOUND
3267 && GENERIC_ID
!= GFC_ISYM_LEN
3268 && GENERIC_ID
!= GFC_ISYM_LOC
3269 && GENERIC_ID
!= GFC_ISYM_C_LOC
3270 && GENERIC_ID
!= GFC_ISYM_PRESENT
)
3272 /* Array intrinsics must also have the last upper bound of an
3273 assumed size array argument. UBOUND and SIZE have to be
3274 excluded from the check if the second argument is anything
3277 for (arg
= expr
->value
.function
.actual
; arg
; arg
= arg
->next
)
3279 if ((GENERIC_ID
== GFC_ISYM_UBOUND
|| GENERIC_ID
== GFC_ISYM_SIZE
)
3280 && arg
== expr
->value
.function
.actual
3281 && arg
->next
!= NULL
&& arg
->next
->expr
)
3283 if (arg
->next
->expr
->expr_type
!= EXPR_CONSTANT
)
3286 if (arg
->next
->name
&& strcmp (arg
->next
->name
, "kind") == 0)
3289 if ((int)mpz_get_si (arg
->next
->expr
->value
.integer
)
3294 if (arg
->expr
!= NULL
3295 && arg
->expr
->rank
> 0
3296 && resolve_assumed_size_actual (arg
->expr
))
3302 need_full_assumed_size
= temp
;
3304 if (!check_pure_function(expr
))
3307 /* Functions without the RECURSIVE attribution are not allowed to
3308 * call themselves. */
3309 if (expr
->value
.function
.esym
&& !expr
->value
.function
.esym
->attr
.recursive
)
3312 esym
= expr
->value
.function
.esym
;
3314 if (is_illegal_recursion (esym
, gfc_current_ns
))
3316 if (esym
->attr
.entry
&& esym
->ns
->entries
)
3317 gfc_error ("ENTRY %qs at %L cannot be called recursively, as"
3318 " function %qs is not RECURSIVE",
3319 esym
->name
, &expr
->where
, esym
->ns
->entries
->sym
->name
);
3321 gfc_error ("Function %qs at %L cannot be called recursively, as it"
3322 " is not RECURSIVE", esym
->name
, &expr
->where
);
3328 /* Character lengths of use associated functions may contains references to
3329 symbols not referenced from the current program unit otherwise. Make sure
3330 those symbols are marked as referenced. */
3332 if (expr
->ts
.type
== BT_CHARACTER
&& expr
->value
.function
.esym
3333 && expr
->value
.function
.esym
->attr
.use_assoc
)
3335 gfc_expr_set_symbols_referenced (expr
->ts
.u
.cl
->length
);
3338 /* Make sure that the expression has a typespec that works. */
3339 if (expr
->ts
.type
== BT_UNKNOWN
)
3341 if (expr
->symtree
->n
.sym
->result
3342 && expr
->symtree
->n
.sym
->result
->ts
.type
!= BT_UNKNOWN
3343 && !expr
->symtree
->n
.sym
->result
->attr
.proc_pointer
)
3344 expr
->ts
= expr
->symtree
->n
.sym
->result
->ts
;
3347 if (!expr
->ref
&& !expr
->value
.function
.isym
)
3349 if (expr
->value
.function
.esym
)
3350 update_current_proc_array_outer_dependency (expr
->value
.function
.esym
);
3352 update_current_proc_array_outer_dependency (sym
);
3355 /* typebound procedure: Assume the worst. */
3356 gfc_current_ns
->proc_name
->attr
.array_outer_dependency
= 1;
3362 /************* Subroutine resolution *************/
3365 pure_subroutine (gfc_symbol
*sym
, const char *name
, locus
*loc
)
3372 gfc_error ("Subroutine call to %qs in FORALL block at %L is not PURE",
3376 else if (gfc_do_concurrent_flag
)
3378 gfc_error ("Subroutine call to %qs in DO CONCURRENT block at %L is not "
3382 else if (gfc_pure (NULL
))
3384 gfc_error ("Subroutine call to %qs at %L is not PURE", name
, loc
);
3388 gfc_unset_implicit_pure (NULL
);
3394 resolve_generic_s0 (gfc_code
*c
, gfc_symbol
*sym
)
3398 if (sym
->attr
.generic
)
3400 s
= gfc_search_interface (sym
->generic
, 1, &c
->ext
.actual
);
3403 c
->resolved_sym
= s
;
3404 if (!pure_subroutine (s
, s
->name
, &c
->loc
))
3409 /* TODO: Need to search for elemental references in generic interface. */
3412 if (sym
->attr
.intrinsic
)
3413 return gfc_intrinsic_sub_interface (c
, 0);
3420 resolve_generic_s (gfc_code
*c
)
3425 sym
= c
->symtree
->n
.sym
;
3429 m
= resolve_generic_s0 (c
, sym
);
3432 else if (m
== MATCH_ERROR
)
3436 if (sym
->ns
->parent
== NULL
)
3438 gfc_find_symbol (sym
->name
, sym
->ns
->parent
, 1, &sym
);
3442 if (!generic_sym (sym
))
3446 /* Last ditch attempt. See if the reference is to an intrinsic
3447 that possesses a matching interface. 14.1.2.4 */
3448 sym
= c
->symtree
->n
.sym
;
3450 if (!gfc_is_intrinsic (sym
, 1, c
->loc
))
3452 gfc_error ("There is no specific subroutine for the generic %qs at %L",
3453 sym
->name
, &c
->loc
);
3457 m
= gfc_intrinsic_sub_interface (c
, 0);
3461 gfc_error ("Generic subroutine %qs at %L is not consistent with an "
3462 "intrinsic subroutine interface", sym
->name
, &c
->loc
);
3468 /* Resolve a subroutine call known to be specific. */
3471 resolve_specific_s0 (gfc_code
*c
, gfc_symbol
*sym
)
3475 if (sym
->attr
.external
|| sym
->attr
.if_source
== IFSRC_IFBODY
)
3477 if (sym
->attr
.dummy
)
3479 sym
->attr
.proc
= PROC_DUMMY
;
3483 sym
->attr
.proc
= PROC_EXTERNAL
;
3487 if (sym
->attr
.proc
== PROC_MODULE
|| sym
->attr
.proc
== PROC_INTERNAL
)
3490 if (sym
->attr
.intrinsic
)
3492 m
= gfc_intrinsic_sub_interface (c
, 1);
3496 gfc_error ("Subroutine %qs at %L is INTRINSIC but is not compatible "
3497 "with an intrinsic", sym
->name
, &c
->loc
);
3505 gfc_procedure_use (sym
, &c
->ext
.actual
, &c
->loc
);
3507 c
->resolved_sym
= sym
;
3508 if (!pure_subroutine (sym
, sym
->name
, &c
->loc
))
3516 resolve_specific_s (gfc_code
*c
)
3521 sym
= c
->symtree
->n
.sym
;
3525 m
= resolve_specific_s0 (c
, sym
);
3528 if (m
== MATCH_ERROR
)
3531 if (sym
->ns
->parent
== NULL
)
3534 gfc_find_symbol (sym
->name
, sym
->ns
->parent
, 1, &sym
);
3540 sym
= c
->symtree
->n
.sym
;
3541 gfc_error ("Unable to resolve the specific subroutine %qs at %L",
3542 sym
->name
, &c
->loc
);
3548 /* Resolve a subroutine call not known to be generic nor specific. */
3551 resolve_unknown_s (gfc_code
*c
)
3555 sym
= c
->symtree
->n
.sym
;
3557 if (sym
->attr
.dummy
)
3559 sym
->attr
.proc
= PROC_DUMMY
;
3563 /* See if we have an intrinsic function reference. */
3565 if (gfc_is_intrinsic (sym
, 1, c
->loc
))
3567 if (gfc_intrinsic_sub_interface (c
, 1) == MATCH_YES
)
3572 /* The reference is to an external name. */
3575 gfc_procedure_use (sym
, &c
->ext
.actual
, &c
->loc
);
3577 c
->resolved_sym
= sym
;
3579 return pure_subroutine (sym
, sym
->name
, &c
->loc
);
3583 /* Resolve a subroutine call. Although it was tempting to use the same code
3584 for functions, subroutines and functions are stored differently and this
3585 makes things awkward. */
3588 resolve_call (gfc_code
*c
)
3591 procedure_type ptype
= PROC_INTRINSIC
;
3592 gfc_symbol
*csym
, *sym
;
3593 bool no_formal_args
;
3595 csym
= c
->symtree
? c
->symtree
->n
.sym
: NULL
;
3597 if (csym
&& csym
->ts
.type
!= BT_UNKNOWN
)
3599 gfc_error ("%qs at %L has a type, which is not consistent with "
3600 "the CALL at %L", csym
->name
, &csym
->declared_at
, &c
->loc
);
3604 if (csym
&& gfc_current_ns
->parent
&& csym
->ns
!= gfc_current_ns
)
3607 gfc_find_sym_tree (c
->symtree
->name
, gfc_current_ns
, 1, &st
);
3608 sym
= st
? st
->n
.sym
: NULL
;
3609 if (sym
&& csym
!= sym
3610 && sym
->ns
== gfc_current_ns
3611 && sym
->attr
.flavor
== FL_PROCEDURE
3612 && sym
->attr
.contained
)
3615 if (csym
->attr
.generic
)
3616 c
->symtree
->n
.sym
= sym
;
3619 csym
= c
->symtree
->n
.sym
;
3623 /* If this ia a deferred TBP, c->expr1 will be set. */
3624 if (!c
->expr1
&& csym
)
3626 if (csym
->attr
.abstract
)
3628 gfc_error ("ABSTRACT INTERFACE %qs must not be referenced at %L",
3629 csym
->name
, &c
->loc
);
3633 /* Subroutines without the RECURSIVE attribution are not allowed to
3635 if (is_illegal_recursion (csym
, gfc_current_ns
))
3637 if (csym
->attr
.entry
&& csym
->ns
->entries
)
3638 gfc_error ("ENTRY %qs at %L cannot be called recursively, "
3639 "as subroutine %qs is not RECURSIVE",
3640 csym
->name
, &c
->loc
, csym
->ns
->entries
->sym
->name
);
3642 gfc_error ("SUBROUTINE %qs at %L cannot be called recursively, "
3643 "as it is not RECURSIVE", csym
->name
, &c
->loc
);
3649 /* Switch off assumed size checking and do this again for certain kinds
3650 of procedure, once the procedure itself is resolved. */
3651 need_full_assumed_size
++;
3654 ptype
= csym
->attr
.proc
;
3656 no_formal_args
= csym
&& is_external_proc (csym
)
3657 && gfc_sym_get_dummy_args (csym
) == NULL
;
3658 if (!resolve_actual_arglist (c
->ext
.actual
, ptype
, no_formal_args
))
3661 /* Resume assumed_size checking. */
3662 need_full_assumed_size
--;
3664 /* If external, check for usage. */
3665 if (csym
&& is_external_proc (csym
))
3666 resolve_global_procedure (csym
, &c
->loc
, 1);
3669 if (c
->resolved_sym
== NULL
)
3671 c
->resolved_isym
= NULL
;
3672 switch (procedure_kind (csym
))
3675 t
= resolve_generic_s (c
);
3678 case PTYPE_SPECIFIC
:
3679 t
= resolve_specific_s (c
);
3683 t
= resolve_unknown_s (c
);
3687 gfc_internal_error ("resolve_subroutine(): bad function type");
3691 /* Some checks of elemental subroutine actual arguments. */
3692 if (!resolve_elemental_actual (NULL
, c
))
3696 update_current_proc_array_outer_dependency (csym
);
3698 /* Typebound procedure: Assume the worst. */
3699 gfc_current_ns
->proc_name
->attr
.array_outer_dependency
= 1;
3705 /* Compare the shapes of two arrays that have non-NULL shapes. If both
3706 op1->shape and op2->shape are non-NULL return true if their shapes
3707 match. If both op1->shape and op2->shape are non-NULL return false
3708 if their shapes do not match. If either op1->shape or op2->shape is
3709 NULL, return true. */
3712 compare_shapes (gfc_expr
*op1
, gfc_expr
*op2
)
3719 if (op1
->shape
!= NULL
&& op2
->shape
!= NULL
)
3721 for (i
= 0; i
< op1
->rank
; i
++)
3723 if (mpz_cmp (op1
->shape
[i
], op2
->shape
[i
]) != 0)
3725 gfc_error ("Shapes for operands at %L and %L are not conformable",
3726 &op1
->where
, &op2
->where
);
3736 /* Convert a logical operator to the corresponding bitwise intrinsic call.
3737 For example A .AND. B becomes IAND(A, B). */
3739 logical_to_bitwise (gfc_expr
*e
)
3741 gfc_expr
*tmp
, *op1
, *op2
;
3743 gfc_actual_arglist
*args
= NULL
;
3745 gcc_assert (e
->expr_type
== EXPR_OP
);
3747 isym
= GFC_ISYM_NONE
;
3748 op1
= e
->value
.op
.op1
;
3749 op2
= e
->value
.op
.op2
;
3751 switch (e
->value
.op
.op
)
3754 isym
= GFC_ISYM_NOT
;
3757 isym
= GFC_ISYM_IAND
;
3760 isym
= GFC_ISYM_IOR
;
3762 case INTRINSIC_NEQV
:
3763 isym
= GFC_ISYM_IEOR
;
3766 /* "Bitwise eqv" is just the complement of NEQV === IEOR.
3767 Change the old expression to NEQV, which will get replaced by IEOR,
3768 and wrap it in NOT. */
3769 tmp
= gfc_copy_expr (e
);
3770 tmp
->value
.op
.op
= INTRINSIC_NEQV
;
3771 tmp
= logical_to_bitwise (tmp
);
3772 isym
= GFC_ISYM_NOT
;
3777 gfc_internal_error ("logical_to_bitwise(): Bad intrinsic");
3780 /* Inherit the original operation's operands as arguments. */
3781 args
= gfc_get_actual_arglist ();
3785 args
->next
= gfc_get_actual_arglist ();
3786 args
->next
->expr
= op2
;
3789 /* Convert the expression to a function call. */
3790 e
->expr_type
= EXPR_FUNCTION
;
3791 e
->value
.function
.actual
= args
;
3792 e
->value
.function
.isym
= gfc_intrinsic_function_by_id (isym
);
3793 e
->value
.function
.name
= e
->value
.function
.isym
->name
;
3794 e
->value
.function
.esym
= NULL
;
3796 /* Make up a pre-resolved function call symtree if we need to. */
3797 if (!e
->symtree
|| !e
->symtree
->n
.sym
)
3800 gfc_get_ha_sym_tree (e
->value
.function
.isym
->name
, &e
->symtree
);
3801 sym
= e
->symtree
->n
.sym
;
3803 sym
->attr
.flavor
= FL_PROCEDURE
;
3804 sym
->attr
.function
= 1;
3805 sym
->attr
.elemental
= 1;
3807 sym
->attr
.referenced
= 1;
3808 gfc_intrinsic_symbol (sym
);
3809 gfc_commit_symbol (sym
);
3812 args
->name
= e
->value
.function
.isym
->formal
->name
;
3813 if (e
->value
.function
.isym
->formal
->next
)
3814 args
->next
->name
= e
->value
.function
.isym
->formal
->next
->name
;
3819 /* Recursively append candidate UOP to CANDIDATES. Store the number of
3820 candidates in CANDIDATES_LEN. */
3822 lookup_uop_fuzzy_find_candidates (gfc_symtree
*uop
,
3824 size_t &candidates_len
)
3831 /* Not sure how to properly filter here. Use all for a start.
3832 n.uop.op is NULL for empty interface operators (is that legal?) disregard
3833 these as i suppose they don't make terribly sense. */
3835 if (uop
->n
.uop
->op
!= NULL
)
3836 vec_push (candidates
, candidates_len
, uop
->name
);
3840 lookup_uop_fuzzy_find_candidates (p
, candidates
, candidates_len
);
3844 lookup_uop_fuzzy_find_candidates (p
, candidates
, candidates_len
);
3847 /* Lookup user-operator OP fuzzily, taking names in UOP into account. */
3850 lookup_uop_fuzzy (const char *op
, gfc_symtree
*uop
)
3852 char **candidates
= NULL
;
3853 size_t candidates_len
= 0;
3854 lookup_uop_fuzzy_find_candidates (uop
, candidates
, candidates_len
);
3855 return gfc_closest_fuzzy_match (op
, candidates
);
3859 /* Callback finding an impure function as an operand to an .and. or
3860 .or. expression. Remember the last function warned about to
3861 avoid double warnings when recursing. */
3864 impure_function_callback (gfc_expr
**e
, int *walk_subtrees ATTRIBUTE_UNUSED
,
3869 static gfc_expr
*last
= NULL
;
3870 bool *found
= (bool *) data
;
3872 if (f
->expr_type
== EXPR_FUNCTION
)
3875 if (f
!= last
&& !gfc_pure_function (f
, &name
)
3876 && !gfc_implicit_pure_function (f
))
3879 gfc_warning (OPT_Wfunction_elimination
,
3880 "Impure function %qs at %L might not be evaluated",
3883 gfc_warning (OPT_Wfunction_elimination
,
3884 "Impure function at %L might not be evaluated",
3894 /* Resolve an operator expression node. This can involve replacing the
3895 operation with a user defined function call. */
3898 resolve_operator (gfc_expr
*e
)
3900 gfc_expr
*op1
, *op2
;
3902 bool dual_locus_error
;
3905 /* Resolve all subnodes-- give them types. */
3907 switch (e
->value
.op
.op
)
3910 if (!gfc_resolve_expr (e
->value
.op
.op2
))
3916 case INTRINSIC_UPLUS
:
3917 case INTRINSIC_UMINUS
:
3918 case INTRINSIC_PARENTHESES
:
3919 if (!gfc_resolve_expr (e
->value
.op
.op1
))
3922 && e
->value
.op
.op1
->ts
.type
== BT_BOZ
&& !e
->value
.op
.op2
)
3924 gfc_error ("BOZ literal constant at %L cannot be an operand of "
3925 "unary operator %qs", &e
->value
.op
.op1
->where
,
3926 gfc_op2string (e
->value
.op
.op
));
3932 /* Typecheck the new node. */
3934 op1
= e
->value
.op
.op1
;
3935 op2
= e
->value
.op
.op2
;
3936 dual_locus_error
= false;
3938 /* op1 and op2 cannot both be BOZ. */
3939 if (op1
&& op1
->ts
.type
== BT_BOZ
3940 && op2
&& op2
->ts
.type
== BT_BOZ
)
3942 gfc_error ("Operands at %L and %L cannot appear as operands of "
3943 "binary operator %qs", &op1
->where
, &op2
->where
,
3944 gfc_op2string (e
->value
.op
.op
));
3948 if ((op1
&& op1
->expr_type
== EXPR_NULL
)
3949 || (op2
&& op2
->expr_type
== EXPR_NULL
))
3951 sprintf (msg
, _("Invalid context for NULL() pointer at %%L"));
3955 switch (e
->value
.op
.op
)
3957 case INTRINSIC_UPLUS
:
3958 case INTRINSIC_UMINUS
:
3959 if (op1
->ts
.type
== BT_INTEGER
3960 || op1
->ts
.type
== BT_REAL
3961 || op1
->ts
.type
== BT_COMPLEX
)
3967 sprintf (msg
, _("Operand of unary numeric operator %%<%s%%> at %%L is %s"),
3968 gfc_op2string (e
->value
.op
.op
), gfc_typename (&e
->ts
));
3971 case INTRINSIC_PLUS
:
3972 case INTRINSIC_MINUS
:
3973 case INTRINSIC_TIMES
:
3974 case INTRINSIC_DIVIDE
:
3975 case INTRINSIC_POWER
:
3976 if (gfc_numeric_ts (&op1
->ts
) && gfc_numeric_ts (&op2
->ts
))
3978 gfc_type_convert_binary (e
, 1);
3982 if (op1
->ts
.type
== BT_DERIVED
|| op2
->ts
.type
== BT_DERIVED
)
3984 _("Unexpected derived-type entities in binary intrinsic "
3985 "numeric operator %%<%s%%> at %%L"),
3986 gfc_op2string (e
->value
.op
.op
));
3989 _("Operands of binary numeric operator %%<%s%%> at %%L are %s/%s"),
3990 gfc_op2string (e
->value
.op
.op
), gfc_typename (&op1
->ts
),
3991 gfc_typename (&op2
->ts
));
3994 case INTRINSIC_CONCAT
:
3995 if (op1
->ts
.type
== BT_CHARACTER
&& op2
->ts
.type
== BT_CHARACTER
3996 && op1
->ts
.kind
== op2
->ts
.kind
)
3998 e
->ts
.type
= BT_CHARACTER
;
3999 e
->ts
.kind
= op1
->ts
.kind
;
4004 _("Operands of string concatenation operator at %%L are %s/%s"),
4005 gfc_typename (&op1
->ts
), gfc_typename (&op2
->ts
));
4011 case INTRINSIC_NEQV
:
4012 if (op1
->ts
.type
== BT_LOGICAL
&& op2
->ts
.type
== BT_LOGICAL
)
4014 e
->ts
.type
= BT_LOGICAL
;
4015 e
->ts
.kind
= gfc_kind_max (op1
, op2
);
4016 if (op1
->ts
.kind
< e
->ts
.kind
)
4017 gfc_convert_type (op1
, &e
->ts
, 2);
4018 else if (op2
->ts
.kind
< e
->ts
.kind
)
4019 gfc_convert_type (op2
, &e
->ts
, 2);
4021 if (flag_frontend_optimize
&&
4022 (e
->value
.op
.op
== INTRINSIC_AND
|| e
->value
.op
.op
== INTRINSIC_OR
))
4024 /* Warn about short-circuiting
4025 with impure function as second operand. */
4027 gfc_expr_walker (&op2
, impure_function_callback
, &op2_f
);
4032 /* Logical ops on integers become bitwise ops with -fdec. */
4034 && (op1
->ts
.type
== BT_INTEGER
|| op2
->ts
.type
== BT_INTEGER
))
4036 e
->ts
.type
= BT_INTEGER
;
4037 e
->ts
.kind
= gfc_kind_max (op1
, op2
);
4038 if (op1
->ts
.type
!= e
->ts
.type
|| op1
->ts
.kind
!= e
->ts
.kind
)
4039 gfc_convert_type (op1
, &e
->ts
, 1);
4040 if (op2
->ts
.type
!= e
->ts
.type
|| op2
->ts
.kind
!= e
->ts
.kind
)
4041 gfc_convert_type (op2
, &e
->ts
, 1);
4042 e
= logical_to_bitwise (e
);
4046 sprintf (msg
, _("Operands of logical operator %%<%s%%> at %%L are %s/%s"),
4047 gfc_op2string (e
->value
.op
.op
), gfc_typename (&op1
->ts
),
4048 gfc_typename (&op2
->ts
));
4053 /* Logical ops on integers become bitwise ops with -fdec. */
4054 if (flag_dec
&& op1
->ts
.type
== BT_INTEGER
)
4056 e
->ts
.type
= BT_INTEGER
;
4057 e
->ts
.kind
= op1
->ts
.kind
;
4058 e
= logical_to_bitwise (e
);
4062 if (op1
->ts
.type
== BT_LOGICAL
)
4064 e
->ts
.type
= BT_LOGICAL
;
4065 e
->ts
.kind
= op1
->ts
.kind
;
4069 sprintf (msg
, _("Operand of .not. operator at %%L is %s"),
4070 gfc_typename (&op1
->ts
));
4074 case INTRINSIC_GT_OS
:
4076 case INTRINSIC_GE_OS
:
4078 case INTRINSIC_LT_OS
:
4080 case INTRINSIC_LE_OS
:
4081 if (op1
->ts
.type
== BT_COMPLEX
|| op2
->ts
.type
== BT_COMPLEX
)
4083 strcpy (msg
, _("COMPLEX quantities cannot be compared at %L"));
4090 case INTRINSIC_EQ_OS
:
4092 case INTRINSIC_NE_OS
:
4093 if (op1
->ts
.type
== BT_CHARACTER
&& op2
->ts
.type
== BT_CHARACTER
4094 && op1
->ts
.kind
== op2
->ts
.kind
)
4096 e
->ts
.type
= BT_LOGICAL
;
4097 e
->ts
.kind
= gfc_default_logical_kind
;
4101 /* If op1 is BOZ, then op2 is not!. Try to convert to type of op2. */
4102 if (op1
->ts
.type
== BT_BOZ
)
4104 if (gfc_invalid_boz ("BOZ literal constant near %L cannot appear as "
4105 "an operand of a relational operator",
4109 if (op2
->ts
.type
== BT_INTEGER
&& !gfc_boz2int (op1
, op2
->ts
.kind
))
4112 if (op2
->ts
.type
== BT_REAL
&& !gfc_boz2real (op1
, op2
->ts
.kind
))
4116 /* If op2 is BOZ, then op1 is not!. Try to convert to type of op2. */
4117 if (op2
->ts
.type
== BT_BOZ
)
4119 if (gfc_invalid_boz ("BOZ literal constant near %L cannot appear as "
4120 "an operand of a relational operator",
4124 if (op1
->ts
.type
== BT_INTEGER
&& !gfc_boz2int (op2
, op1
->ts
.kind
))
4127 if (op1
->ts
.type
== BT_REAL
&& !gfc_boz2real (op2
, op1
->ts
.kind
))
4131 if (gfc_numeric_ts (&op1
->ts
) && gfc_numeric_ts (&op2
->ts
))
4133 gfc_type_convert_binary (e
, 1);
4135 e
->ts
.type
= BT_LOGICAL
;
4136 e
->ts
.kind
= gfc_default_logical_kind
;
4138 if (warn_compare_reals
)
4140 gfc_intrinsic_op op
= e
->value
.op
.op
;
4142 /* Type conversion has made sure that the types of op1 and op2
4143 agree, so it is only necessary to check the first one. */
4144 if ((op1
->ts
.type
== BT_REAL
|| op1
->ts
.type
== BT_COMPLEX
)
4145 && (op
== INTRINSIC_EQ
|| op
== INTRINSIC_EQ_OS
4146 || op
== INTRINSIC_NE
|| op
== INTRINSIC_NE_OS
))
4150 if (op
== INTRINSIC_EQ
|| op
== INTRINSIC_EQ_OS
)
4151 msg
= "Equality comparison for %s at %L";
4153 msg
= "Inequality comparison for %s at %L";
4155 gfc_warning (OPT_Wcompare_reals
, msg
,
4156 gfc_typename (&op1
->ts
), &op1
->where
);
4163 if (op1
->ts
.type
== BT_LOGICAL
&& op2
->ts
.type
== BT_LOGICAL
)
4165 _("Logicals at %%L must be compared with %s instead of %s"),
4166 (e
->value
.op
.op
== INTRINSIC_EQ
4167 || e
->value
.op
.op
== INTRINSIC_EQ_OS
)
4168 ? ".eqv." : ".neqv.", gfc_op2string (e
->value
.op
.op
));
4171 _("Operands of comparison operator %%<%s%%> at %%L are %s/%s"),
4172 gfc_op2string (e
->value
.op
.op
), gfc_typename (&op1
->ts
),
4173 gfc_typename (&op2
->ts
));
4177 case INTRINSIC_USER
:
4178 if (e
->value
.op
.uop
->op
== NULL
)
4180 const char *name
= e
->value
.op
.uop
->name
;
4181 const char *guessed
;
4182 guessed
= lookup_uop_fuzzy (name
, e
->value
.op
.uop
->ns
->uop_root
);
4184 sprintf (msg
, _("Unknown operator %%<%s%%> at %%L; did you mean '%s'?"),
4187 sprintf (msg
, _("Unknown operator %%<%s%%> at %%L"), name
);
4189 else if (op2
== NULL
)
4190 sprintf (msg
, _("Operand of user operator %%<%s%%> at %%L is %s"),
4191 e
->value
.op
.uop
->name
, gfc_typename (&op1
->ts
));
4194 sprintf (msg
, _("Operands of user operator %%<%s%%> at %%L are %s/%s"),
4195 e
->value
.op
.uop
->name
, gfc_typename (&op1
->ts
),
4196 gfc_typename (&op2
->ts
));
4197 e
->value
.op
.uop
->op
->sym
->attr
.referenced
= 1;
4202 case INTRINSIC_PARENTHESES
:
4204 if (e
->ts
.type
== BT_CHARACTER
)
4205 e
->ts
.u
.cl
= op1
->ts
.u
.cl
;
4209 gfc_internal_error ("resolve_operator(): Bad intrinsic");
4212 /* Deal with arrayness of an operand through an operator. */
4214 switch (e
->value
.op
.op
)
4216 case INTRINSIC_PLUS
:
4217 case INTRINSIC_MINUS
:
4218 case INTRINSIC_TIMES
:
4219 case INTRINSIC_DIVIDE
:
4220 case INTRINSIC_POWER
:
4221 case INTRINSIC_CONCAT
:
4225 case INTRINSIC_NEQV
:
4227 case INTRINSIC_EQ_OS
:
4229 case INTRINSIC_NE_OS
:
4231 case INTRINSIC_GT_OS
:
4233 case INTRINSIC_GE_OS
:
4235 case INTRINSIC_LT_OS
:
4237 case INTRINSIC_LE_OS
:
4239 if (op1
->rank
== 0 && op2
->rank
== 0)
4242 if (op1
->rank
== 0 && op2
->rank
!= 0)
4244 e
->rank
= op2
->rank
;
4246 if (e
->shape
== NULL
)
4247 e
->shape
= gfc_copy_shape (op2
->shape
, op2
->rank
);
4250 if (op1
->rank
!= 0 && op2
->rank
== 0)
4252 e
->rank
= op1
->rank
;
4254 if (e
->shape
== NULL
)
4255 e
->shape
= gfc_copy_shape (op1
->shape
, op1
->rank
);
4258 if (op1
->rank
!= 0 && op2
->rank
!= 0)
4260 if (op1
->rank
== op2
->rank
)
4262 e
->rank
= op1
->rank
;
4263 if (e
->shape
== NULL
)
4265 t
= compare_shapes (op1
, op2
);
4269 e
->shape
= gfc_copy_shape (op1
->shape
, op1
->rank
);
4274 /* Allow higher level expressions to work. */
4277 /* Try user-defined operators, and otherwise throw an error. */
4278 dual_locus_error
= true;
4280 _("Inconsistent ranks for operator at %%L and %%L"));
4287 case INTRINSIC_PARENTHESES
:
4289 case INTRINSIC_UPLUS
:
4290 case INTRINSIC_UMINUS
:
4291 /* Simply copy arrayness attribute */
4292 e
->rank
= op1
->rank
;
4294 if (e
->shape
== NULL
)
4295 e
->shape
= gfc_copy_shape (op1
->shape
, op1
->rank
);
4305 /* Attempt to simplify the expression. */
4308 t
= gfc_simplify_expr (e
, 0);
4309 /* Some calls do not succeed in simplification and return false
4310 even though there is no error; e.g. variable references to
4311 PARAMETER arrays. */
4312 if (!gfc_is_constant_expr (e
))
4320 match m
= gfc_extend_expr (e
);
4323 if (m
== MATCH_ERROR
)
4327 if (dual_locus_error
)
4328 gfc_error (msg
, &op1
->where
, &op2
->where
);
4330 gfc_error (msg
, &e
->where
);
4336 /************** Array resolution subroutines **************/
4339 { CMP_LT
, CMP_EQ
, CMP_GT
, CMP_UNKNOWN
};
4341 /* Compare two integer expressions. */
4343 static compare_result
4344 compare_bound (gfc_expr
*a
, gfc_expr
*b
)
4348 if (a
== NULL
|| a
->expr_type
!= EXPR_CONSTANT
4349 || b
== NULL
|| b
->expr_type
!= EXPR_CONSTANT
)
4352 /* If either of the types isn't INTEGER, we must have
4353 raised an error earlier. */
4355 if (a
->ts
.type
!= BT_INTEGER
|| b
->ts
.type
!= BT_INTEGER
)
4358 i
= mpz_cmp (a
->value
.integer
, b
->value
.integer
);
4368 /* Compare an integer expression with an integer. */
4370 static compare_result
4371 compare_bound_int (gfc_expr
*a
, int b
)
4375 if (a
== NULL
|| a
->expr_type
!= EXPR_CONSTANT
)
4378 if (a
->ts
.type
!= BT_INTEGER
)
4379 gfc_internal_error ("compare_bound_int(): Bad expression");
4381 i
= mpz_cmp_si (a
->value
.integer
, b
);
4391 /* Compare an integer expression with a mpz_t. */
4393 static compare_result
4394 compare_bound_mpz_t (gfc_expr
*a
, mpz_t b
)
4398 if (a
== NULL
|| a
->expr_type
!= EXPR_CONSTANT
)
4401 if (a
->ts
.type
!= BT_INTEGER
)
4402 gfc_internal_error ("compare_bound_int(): Bad expression");
4404 i
= mpz_cmp (a
->value
.integer
, b
);
4414 /* Compute the last value of a sequence given by a triplet.
4415 Return 0 if it wasn't able to compute the last value, or if the
4416 sequence if empty, and 1 otherwise. */
4419 compute_last_value_for_triplet (gfc_expr
*start
, gfc_expr
*end
,
4420 gfc_expr
*stride
, mpz_t last
)
4424 if (start
== NULL
|| start
->expr_type
!= EXPR_CONSTANT
4425 || end
== NULL
|| end
->expr_type
!= EXPR_CONSTANT
4426 || (stride
!= NULL
&& stride
->expr_type
!= EXPR_CONSTANT
))
4429 if (start
->ts
.type
!= BT_INTEGER
|| end
->ts
.type
!= BT_INTEGER
4430 || (stride
!= NULL
&& stride
->ts
.type
!= BT_INTEGER
))
4433 if (stride
== NULL
|| compare_bound_int (stride
, 1) == CMP_EQ
)
4435 if (compare_bound (start
, end
) == CMP_GT
)
4437 mpz_set (last
, end
->value
.integer
);
4441 if (compare_bound_int (stride
, 0) == CMP_GT
)
4443 /* Stride is positive */
4444 if (mpz_cmp (start
->value
.integer
, end
->value
.integer
) > 0)
4449 /* Stride is negative */
4450 if (mpz_cmp (start
->value
.integer
, end
->value
.integer
) < 0)
4455 mpz_sub (rem
, end
->value
.integer
, start
->value
.integer
);
4456 mpz_tdiv_r (rem
, rem
, stride
->value
.integer
);
4457 mpz_sub (last
, end
->value
.integer
, rem
);
4464 /* Compare a single dimension of an array reference to the array
4468 check_dimension (int i
, gfc_array_ref
*ar
, gfc_array_spec
*as
)
4472 if (ar
->dimen_type
[i
] == DIMEN_STAR
)
4474 gcc_assert (ar
->stride
[i
] == NULL
);
4475 /* This implies [*] as [*:] and [*:3] are not possible. */
4476 if (ar
->start
[i
] == NULL
)
4478 gcc_assert (ar
->end
[i
] == NULL
);
4483 /* Given start, end and stride values, calculate the minimum and
4484 maximum referenced indexes. */
4486 switch (ar
->dimen_type
[i
])
4489 case DIMEN_THIS_IMAGE
:
4494 if (compare_bound (ar
->start
[i
], as
->lower
[i
]) == CMP_LT
)
4497 gfc_warning (0, "Array reference at %L is out of bounds "
4498 "(%ld < %ld) in dimension %d", &ar
->c_where
[i
],
4499 mpz_get_si (ar
->start
[i
]->value
.integer
),
4500 mpz_get_si (as
->lower
[i
]->value
.integer
), i
+1);
4502 gfc_warning (0, "Array reference at %L is out of bounds "
4503 "(%ld < %ld) in codimension %d", &ar
->c_where
[i
],
4504 mpz_get_si (ar
->start
[i
]->value
.integer
),
4505 mpz_get_si (as
->lower
[i
]->value
.integer
),
4509 if (compare_bound (ar
->start
[i
], as
->upper
[i
]) == CMP_GT
)
4512 gfc_warning (0, "Array reference at %L is out of bounds "
4513 "(%ld > %ld) in dimension %d", &ar
->c_where
[i
],
4514 mpz_get_si (ar
->start
[i
]->value
.integer
),
4515 mpz_get_si (as
->upper
[i
]->value
.integer
), i
+1);
4517 gfc_warning (0, "Array reference at %L is out of bounds "
4518 "(%ld > %ld) in codimension %d", &ar
->c_where
[i
],
4519 mpz_get_si (ar
->start
[i
]->value
.integer
),
4520 mpz_get_si (as
->upper
[i
]->value
.integer
),
4529 #define AR_START (ar->start[i] ? ar->start[i] : as->lower[i])
4530 #define AR_END (ar->end[i] ? ar->end[i] : as->upper[i])
4532 compare_result comp_start_end
= compare_bound (AR_START
, AR_END
);
4534 /* Check for zero stride, which is not allowed. */
4535 if (compare_bound_int (ar
->stride
[i
], 0) == CMP_EQ
)
4537 gfc_error ("Illegal stride of zero at %L", &ar
->c_where
[i
]);
4541 /* if start == len || (stride > 0 && start < len)
4542 || (stride < 0 && start > len),
4543 then the array section contains at least one element. In this
4544 case, there is an out-of-bounds access if
4545 (start < lower || start > upper). */
4546 if (compare_bound (AR_START
, AR_END
) == CMP_EQ
4547 || ((compare_bound_int (ar
->stride
[i
], 0) == CMP_GT
4548 || ar
->stride
[i
] == NULL
) && comp_start_end
== CMP_LT
)
4549 || (compare_bound_int (ar
->stride
[i
], 0) == CMP_LT
4550 && comp_start_end
== CMP_GT
))
4552 if (compare_bound (AR_START
, as
->lower
[i
]) == CMP_LT
)
4554 gfc_warning (0, "Lower array reference at %L is out of bounds "
4555 "(%ld < %ld) in dimension %d", &ar
->c_where
[i
],
4556 mpz_get_si (AR_START
->value
.integer
),
4557 mpz_get_si (as
->lower
[i
]->value
.integer
), i
+1);
4560 if (compare_bound (AR_START
, as
->upper
[i
]) == CMP_GT
)
4562 gfc_warning (0, "Lower array reference at %L is out of bounds "
4563 "(%ld > %ld) in dimension %d", &ar
->c_where
[i
],
4564 mpz_get_si (AR_START
->value
.integer
),
4565 mpz_get_si (as
->upper
[i
]->value
.integer
), i
+1);
4570 /* If we can compute the highest index of the array section,
4571 then it also has to be between lower and upper. */
4572 mpz_init (last_value
);
4573 if (compute_last_value_for_triplet (AR_START
, AR_END
, ar
->stride
[i
],
4576 if (compare_bound_mpz_t (as
->lower
[i
], last_value
) == CMP_GT
)
4578 gfc_warning (0, "Upper array reference at %L is out of bounds "
4579 "(%ld < %ld) in dimension %d", &ar
->c_where
[i
],
4580 mpz_get_si (last_value
),
4581 mpz_get_si (as
->lower
[i
]->value
.integer
), i
+1);
4582 mpz_clear (last_value
);
4585 if (compare_bound_mpz_t (as
->upper
[i
], last_value
) == CMP_LT
)
4587 gfc_warning (0, "Upper array reference at %L is out of bounds "
4588 "(%ld > %ld) in dimension %d", &ar
->c_where
[i
],
4589 mpz_get_si (last_value
),
4590 mpz_get_si (as
->upper
[i
]->value
.integer
), i
+1);
4591 mpz_clear (last_value
);
4595 mpz_clear (last_value
);
4603 gfc_internal_error ("check_dimension(): Bad array reference");
4610 /* Compare an array reference with an array specification. */
4613 compare_spec_to_ref (gfc_array_ref
*ar
)
4620 /* TODO: Full array sections are only allowed as actual parameters. */
4621 if (as
->type
== AS_ASSUMED_SIZE
4622 && (/*ar->type == AR_FULL
4623 ||*/ (ar
->type
== AR_SECTION
4624 && ar
->dimen_type
[i
] == DIMEN_RANGE
&& ar
->end
[i
] == NULL
)))
4626 gfc_error ("Rightmost upper bound of assumed size array section "
4627 "not specified at %L", &ar
->where
);
4631 if (ar
->type
== AR_FULL
)
4634 if (as
->rank
!= ar
->dimen
)
4636 gfc_error ("Rank mismatch in array reference at %L (%d/%d)",
4637 &ar
->where
, ar
->dimen
, as
->rank
);
4641 /* ar->codimen == 0 is a local array. */
4642 if (as
->corank
!= ar
->codimen
&& ar
->codimen
!= 0)
4644 gfc_error ("Coindex rank mismatch in array reference at %L (%d/%d)",
4645 &ar
->where
, ar
->codimen
, as
->corank
);
4649 for (i
= 0; i
< as
->rank
; i
++)
4650 if (!check_dimension (i
, ar
, as
))
4653 /* Local access has no coarray spec. */
4654 if (ar
->codimen
!= 0)
4655 for (i
= as
->rank
; i
< as
->rank
+ as
->corank
; i
++)
4657 if (ar
->dimen_type
[i
] != DIMEN_ELEMENT
&& !ar
->in_allocate
4658 && ar
->dimen_type
[i
] != DIMEN_THIS_IMAGE
)
4660 gfc_error ("Coindex of codimension %d must be a scalar at %L",
4661 i
+ 1 - as
->rank
, &ar
->where
);
4664 if (!check_dimension (i
, ar
, as
))
4672 /* Resolve one part of an array index. */
4675 gfc_resolve_index_1 (gfc_expr
*index
, int check_scalar
,
4676 int force_index_integer_kind
)
4683 if (!gfc_resolve_expr (index
))
4686 if (check_scalar
&& index
->rank
!= 0)
4688 gfc_error ("Array index at %L must be scalar", &index
->where
);
4692 if (index
->ts
.type
!= BT_INTEGER
&& index
->ts
.type
!= BT_REAL
)
4694 gfc_error ("Array index at %L must be of INTEGER type, found %s",
4695 &index
->where
, gfc_basic_typename (index
->ts
.type
));
4699 if (index
->ts
.type
== BT_REAL
)
4700 if (!gfc_notify_std (GFC_STD_LEGACY
, "REAL array index at %L",
4704 if ((index
->ts
.kind
!= gfc_index_integer_kind
4705 && force_index_integer_kind
)
4706 || index
->ts
.type
!= BT_INTEGER
)
4709 ts
.type
= BT_INTEGER
;
4710 ts
.kind
= gfc_index_integer_kind
;
4712 gfc_convert_type_warn (index
, &ts
, 2, 0);
4718 /* Resolve one part of an array index. */
4721 gfc_resolve_index (gfc_expr
*index
, int check_scalar
)
4723 return gfc_resolve_index_1 (index
, check_scalar
, 1);
4726 /* Resolve a dim argument to an intrinsic function. */
4729 gfc_resolve_dim_arg (gfc_expr
*dim
)
4734 if (!gfc_resolve_expr (dim
))
4739 gfc_error ("Argument dim at %L must be scalar", &dim
->where
);
4744 if (dim
->ts
.type
!= BT_INTEGER
)
4746 gfc_error ("Argument dim at %L must be of INTEGER type", &dim
->where
);
4750 if (dim
->ts
.kind
!= gfc_index_integer_kind
)
4755 ts
.type
= BT_INTEGER
;
4756 ts
.kind
= gfc_index_integer_kind
;
4758 gfc_convert_type_warn (dim
, &ts
, 2, 0);
4764 /* Given an expression that contains array references, update those array
4765 references to point to the right array specifications. While this is
4766 filled in during matching, this information is difficult to save and load
4767 in a module, so we take care of it here.
4769 The idea here is that the original array reference comes from the
4770 base symbol. We traverse the list of reference structures, setting
4771 the stored reference to references. Component references can
4772 provide an additional array specification. */
4775 find_array_spec (gfc_expr
*e
)
4780 bool class_as
= false;
4782 if (e
->symtree
->n
.sym
->ts
.type
== BT_CLASS
)
4784 as
= CLASS_DATA (e
->symtree
->n
.sym
)->as
;
4788 as
= e
->symtree
->n
.sym
->as
;
4790 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
4795 gfc_internal_error ("find_array_spec(): Missing spec");
4802 c
= ref
->u
.c
.component
;
4803 if (c
->attr
.dimension
)
4805 if (as
!= NULL
&& !(class_as
&& as
== c
->as
))
4806 gfc_internal_error ("find_array_spec(): unused as(1)");
4818 gfc_internal_error ("find_array_spec(): unused as(2)");
4822 /* Resolve an array reference. */
4825 resolve_array_ref (gfc_array_ref
*ar
)
4827 int i
, check_scalar
;
4830 for (i
= 0; i
< ar
->dimen
+ ar
->codimen
; i
++)
4832 check_scalar
= ar
->dimen_type
[i
] == DIMEN_RANGE
;
4834 /* Do not force gfc_index_integer_kind for the start. We can
4835 do fine with any integer kind. This avoids temporary arrays
4836 created for indexing with a vector. */
4837 if (!gfc_resolve_index_1 (ar
->start
[i
], check_scalar
, 0))
4839 if (!gfc_resolve_index (ar
->end
[i
], check_scalar
))
4841 if (!gfc_resolve_index (ar
->stride
[i
], check_scalar
))
4846 if (ar
->dimen_type
[i
] == DIMEN_UNKNOWN
)
4850 ar
->dimen_type
[i
] = DIMEN_ELEMENT
;
4854 ar
->dimen_type
[i
] = DIMEN_VECTOR
;
4855 if (e
->expr_type
== EXPR_VARIABLE
4856 && e
->symtree
->n
.sym
->ts
.type
== BT_DERIVED
)
4857 ar
->start
[i
] = gfc_get_parentheses (e
);
4861 gfc_error ("Array index at %L is an array of rank %d",
4862 &ar
->c_where
[i
], e
->rank
);
4866 /* Fill in the upper bound, which may be lower than the
4867 specified one for something like a(2:10:5), which is
4868 identical to a(2:7:5). Only relevant for strides not equal
4869 to one. Don't try a division by zero. */
4870 if (ar
->dimen_type
[i
] == DIMEN_RANGE
4871 && ar
->stride
[i
] != NULL
&& ar
->stride
[i
]->expr_type
== EXPR_CONSTANT
4872 && mpz_cmp_si (ar
->stride
[i
]->value
.integer
, 1L) != 0
4873 && mpz_cmp_si (ar
->stride
[i
]->value
.integer
, 0L) != 0)
4877 if (gfc_ref_dimen_size (ar
, i
, &size
, &end
))
4879 if (ar
->end
[i
] == NULL
)
4882 gfc_get_constant_expr (BT_INTEGER
, gfc_index_integer_kind
,
4884 mpz_set (ar
->end
[i
]->value
.integer
, end
);
4886 else if (ar
->end
[i
]->ts
.type
== BT_INTEGER
4887 && ar
->end
[i
]->expr_type
== EXPR_CONSTANT
)
4889 mpz_set (ar
->end
[i
]->value
.integer
, end
);
4900 if (ar
->type
== AR_FULL
)
4902 if (ar
->as
->rank
== 0)
4903 ar
->type
= AR_ELEMENT
;
4905 /* Make sure array is the same as array(:,:), this way
4906 we don't need to special case all the time. */
4907 ar
->dimen
= ar
->as
->rank
;
4908 for (i
= 0; i
< ar
->dimen
; i
++)
4910 ar
->dimen_type
[i
] = DIMEN_RANGE
;
4912 gcc_assert (ar
->start
[i
] == NULL
);
4913 gcc_assert (ar
->end
[i
] == NULL
);
4914 gcc_assert (ar
->stride
[i
] == NULL
);
4918 /* If the reference type is unknown, figure out what kind it is. */
4920 if (ar
->type
== AR_UNKNOWN
)
4922 ar
->type
= AR_ELEMENT
;
4923 for (i
= 0; i
< ar
->dimen
; i
++)
4924 if (ar
->dimen_type
[i
] == DIMEN_RANGE
4925 || ar
->dimen_type
[i
] == DIMEN_VECTOR
)
4927 ar
->type
= AR_SECTION
;
4932 if (!ar
->as
->cray_pointee
&& !compare_spec_to_ref (ar
))
4935 if (ar
->as
->corank
&& ar
->codimen
== 0)
4938 ar
->codimen
= ar
->as
->corank
;
4939 for (n
= ar
->dimen
; n
< ar
->dimen
+ ar
->codimen
; n
++)
4940 ar
->dimen_type
[n
] = DIMEN_THIS_IMAGE
;
4948 resolve_substring (gfc_ref
*ref
, bool *equal_length
)
4950 int k
= gfc_validate_kind (BT_INTEGER
, gfc_charlen_int_kind
, false);
4952 if (ref
->u
.ss
.start
!= NULL
)
4954 if (!gfc_resolve_expr (ref
->u
.ss
.start
))
4957 if (ref
->u
.ss
.start
->ts
.type
!= BT_INTEGER
)
4959 gfc_error ("Substring start index at %L must be of type INTEGER",
4960 &ref
->u
.ss
.start
->where
);
4964 if (ref
->u
.ss
.start
->rank
!= 0)
4966 gfc_error ("Substring start index at %L must be scalar",
4967 &ref
->u
.ss
.start
->where
);
4971 if (compare_bound_int (ref
->u
.ss
.start
, 1) == CMP_LT
4972 && (compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_EQ
4973 || compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_GT
))
4975 gfc_error ("Substring start index at %L is less than one",
4976 &ref
->u
.ss
.start
->where
);
4981 if (ref
->u
.ss
.end
!= NULL
)
4983 if (!gfc_resolve_expr (ref
->u
.ss
.end
))
4986 if (ref
->u
.ss
.end
->ts
.type
!= BT_INTEGER
)
4988 gfc_error ("Substring end index at %L must be of type INTEGER",
4989 &ref
->u
.ss
.end
->where
);
4993 if (ref
->u
.ss
.end
->rank
!= 0)
4995 gfc_error ("Substring end index at %L must be scalar",
4996 &ref
->u
.ss
.end
->where
);
5000 if (ref
->u
.ss
.length
!= NULL
5001 && compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.length
->length
) == CMP_GT
5002 && (compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_EQ
5003 || compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_GT
))
5005 gfc_error ("Substring end index at %L exceeds the string length",
5006 &ref
->u
.ss
.start
->where
);
5010 if (compare_bound_mpz_t (ref
->u
.ss
.end
,
5011 gfc_integer_kinds
[k
].huge
) == CMP_GT
5012 && (compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_EQ
5013 || compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_GT
))
5015 gfc_error ("Substring end index at %L is too large",
5016 &ref
->u
.ss
.end
->where
);
5019 /* If the substring has the same length as the original
5020 variable, the reference itself can be deleted. */
5022 if (ref
->u
.ss
.length
!= NULL
5023 && compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.length
->length
) == CMP_EQ
5024 && compare_bound_int (ref
->u
.ss
.start
, 1) == CMP_EQ
)
5025 *equal_length
= true;
5032 /* This function supplies missing substring charlens. */
5035 gfc_resolve_substring_charlen (gfc_expr
*e
)
5038 gfc_expr
*start
, *end
;
5039 gfc_typespec
*ts
= NULL
;
5042 for (char_ref
= e
->ref
; char_ref
; char_ref
= char_ref
->next
)
5044 if (char_ref
->type
== REF_SUBSTRING
|| char_ref
->type
== REF_INQUIRY
)
5046 if (char_ref
->type
== REF_COMPONENT
)
5047 ts
= &char_ref
->u
.c
.component
->ts
;
5050 if (!char_ref
|| char_ref
->type
== REF_INQUIRY
)
5053 gcc_assert (char_ref
->next
== NULL
);
5057 if (e
->ts
.u
.cl
->length
)
5058 gfc_free_expr (e
->ts
.u
.cl
->length
);
5059 else if (e
->expr_type
== EXPR_VARIABLE
&& e
->symtree
->n
.sym
->attr
.dummy
)
5063 e
->ts
.type
= BT_CHARACTER
;
5064 e
->ts
.kind
= gfc_default_character_kind
;
5067 e
->ts
.u
.cl
= gfc_new_charlen (gfc_current_ns
, NULL
);
5069 if (char_ref
->u
.ss
.start
)
5070 start
= gfc_copy_expr (char_ref
->u
.ss
.start
);
5072 start
= gfc_get_int_expr (gfc_charlen_int_kind
, NULL
, 1);
5074 if (char_ref
->u
.ss
.end
)
5075 end
= gfc_copy_expr (char_ref
->u
.ss
.end
);
5076 else if (e
->expr_type
== EXPR_VARIABLE
)
5079 ts
= &e
->symtree
->n
.sym
->ts
;
5080 end
= gfc_copy_expr (ts
->u
.cl
->length
);
5087 gfc_free_expr (start
);
5088 gfc_free_expr (end
);
5092 /* Length = (end - start + 1).
5093 Check first whether it has a constant length. */
5094 if (gfc_dep_difference (end
, start
, &diff
))
5096 gfc_expr
*len
= gfc_get_constant_expr (BT_INTEGER
, gfc_charlen_int_kind
,
5099 mpz_add_ui (len
->value
.integer
, diff
, 1);
5101 e
->ts
.u
.cl
->length
= len
;
5102 /* The check for length < 0 is handled below */
5106 e
->ts
.u
.cl
->length
= gfc_subtract (end
, start
);
5107 e
->ts
.u
.cl
->length
= gfc_add (e
->ts
.u
.cl
->length
,
5108 gfc_get_int_expr (gfc_charlen_int_kind
,
5112 /* F2008, 6.4.1: Both the starting point and the ending point shall
5113 be within the range 1, 2, ..., n unless the starting point exceeds
5114 the ending point, in which case the substring has length zero. */
5116 if (mpz_cmp_si (e
->ts
.u
.cl
->length
->value
.integer
, 0) < 0)
5117 mpz_set_si (e
->ts
.u
.cl
->length
->value
.integer
, 0);
5119 e
->ts
.u
.cl
->length
->ts
.type
= BT_INTEGER
;
5120 e
->ts
.u
.cl
->length
->ts
.kind
= gfc_charlen_int_kind
;
5122 /* Make sure that the length is simplified. */
5123 gfc_simplify_expr (e
->ts
.u
.cl
->length
, 1);
5124 gfc_resolve_expr (e
->ts
.u
.cl
->length
);
5128 /* Resolve subtype references. */
5131 resolve_ref (gfc_expr
*expr
)
5133 int current_part_dimension
, n_components
, seen_part_dimension
;
5134 gfc_ref
*ref
, **prev
;
5137 for (ref
= expr
->ref
; ref
; ref
= ref
->next
)
5138 if (ref
->type
== REF_ARRAY
&& ref
->u
.ar
.as
== NULL
)
5140 find_array_spec (expr
);
5144 for (prev
= &expr
->ref
; *prev
!= NULL
;
5145 prev
= *prev
== NULL
? prev
: &(*prev
)->next
)
5146 switch ((*prev
)->type
)
5149 if (!resolve_array_ref (&(*prev
)->u
.ar
))
5158 equal_length
= false;
5159 if (!resolve_substring (*prev
, &equal_length
))
5162 if (expr
->expr_type
!= EXPR_SUBSTRING
&& equal_length
)
5164 /* Remove the reference and move the charlen, if any. */
5168 expr
->ts
.u
.cl
= ref
->u
.ss
.length
;
5169 ref
->u
.ss
.length
= NULL
;
5170 gfc_free_ref_list (ref
);
5175 /* Check constraints on part references. */
5177 current_part_dimension
= 0;
5178 seen_part_dimension
= 0;
5181 for (ref
= expr
->ref
; ref
; ref
= ref
->next
)
5186 switch (ref
->u
.ar
.type
)
5189 /* Coarray scalar. */
5190 if (ref
->u
.ar
.as
->rank
== 0)
5192 current_part_dimension
= 0;
5197 current_part_dimension
= 1;
5201 current_part_dimension
= 0;
5205 gfc_internal_error ("resolve_ref(): Bad array reference");
5211 if (current_part_dimension
|| seen_part_dimension
)
5214 if (ref
->u
.c
.component
->attr
.pointer
5215 || ref
->u
.c
.component
->attr
.proc_pointer
5216 || (ref
->u
.c
.component
->ts
.type
== BT_CLASS
5217 && CLASS_DATA (ref
->u
.c
.component
)->attr
.pointer
))
5219 gfc_error ("Component to the right of a part reference "
5220 "with nonzero rank must not have the POINTER "
5221 "attribute at %L", &expr
->where
);
5224 else if (ref
->u
.c
.component
->attr
.allocatable
5225 || (ref
->u
.c
.component
->ts
.type
== BT_CLASS
5226 && CLASS_DATA (ref
->u
.c
.component
)->attr
.allocatable
))
5229 gfc_error ("Component to the right of a part reference "
5230 "with nonzero rank must not have the ALLOCATABLE "
5231 "attribute at %L", &expr
->where
);
5244 if (((ref
->type
== REF_COMPONENT
&& n_components
> 1)
5245 || ref
->next
== NULL
)
5246 && current_part_dimension
5247 && seen_part_dimension
)
5249 gfc_error ("Two or more part references with nonzero rank must "
5250 "not be specified at %L", &expr
->where
);
5254 if (ref
->type
== REF_COMPONENT
)
5256 if (current_part_dimension
)
5257 seen_part_dimension
= 1;
5259 /* reset to make sure */
5260 current_part_dimension
= 0;
5268 /* Given an expression, determine its shape. This is easier than it sounds.
5269 Leaves the shape array NULL if it is not possible to determine the shape. */
5272 expression_shape (gfc_expr
*e
)
5274 mpz_t array
[GFC_MAX_DIMENSIONS
];
5277 if (e
->rank
<= 0 || e
->shape
!= NULL
)
5280 for (i
= 0; i
< e
->rank
; i
++)
5281 if (!gfc_array_dimen_size (e
, i
, &array
[i
]))
5284 e
->shape
= gfc_get_shape (e
->rank
);
5286 memcpy (e
->shape
, array
, e
->rank
* sizeof (mpz_t
));
5291 for (i
--; i
>= 0; i
--)
5292 mpz_clear (array
[i
]);
5296 /* Given a variable expression node, compute the rank of the expression by
5297 examining the base symbol and any reference structures it may have. */
5300 expression_rank (gfc_expr
*e
)
5305 /* Just to make sure, because EXPR_COMPCALL's also have an e->ref and that
5306 could lead to serious confusion... */
5307 gcc_assert (e
->expr_type
!= EXPR_COMPCALL
);
5311 if (e
->expr_type
== EXPR_ARRAY
)
5313 /* Constructors can have a rank different from one via RESHAPE(). */
5315 if (e
->symtree
== NULL
)
5321 e
->rank
= (e
->symtree
->n
.sym
->as
== NULL
)
5322 ? 0 : e
->symtree
->n
.sym
->as
->rank
;
5328 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
5330 if (ref
->type
== REF_COMPONENT
&& ref
->u
.c
.component
->attr
.proc_pointer
5331 && ref
->u
.c
.component
->attr
.function
&& !ref
->next
)
5332 rank
= ref
->u
.c
.component
->as
? ref
->u
.c
.component
->as
->rank
: 0;
5334 if (ref
->type
!= REF_ARRAY
)
5337 if (ref
->u
.ar
.type
== AR_FULL
)
5339 rank
= ref
->u
.ar
.as
->rank
;
5343 if (ref
->u
.ar
.type
== AR_SECTION
)
5345 /* Figure out the rank of the section. */
5347 gfc_internal_error ("expression_rank(): Two array specs");
5349 for (i
= 0; i
< ref
->u
.ar
.dimen
; i
++)
5350 if (ref
->u
.ar
.dimen_type
[i
] == DIMEN_RANGE
5351 || ref
->u
.ar
.dimen_type
[i
] == DIMEN_VECTOR
)
5361 expression_shape (e
);
5366 add_caf_get_intrinsic (gfc_expr
*e
)
5368 gfc_expr
*wrapper
, *tmp_expr
;
5372 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
5373 if (ref
->type
== REF_ARRAY
&& ref
->u
.ar
.codimen
> 0)
5378 for (n
= ref
->u
.ar
.dimen
; n
< ref
->u
.ar
.dimen
+ ref
->u
.ar
.codimen
; n
++)
5379 if (ref
->u
.ar
.dimen_type
[n
] != DIMEN_ELEMENT
)
5382 tmp_expr
= XCNEW (gfc_expr
);
5384 wrapper
= gfc_build_intrinsic_call (gfc_current_ns
, GFC_ISYM_CAF_GET
,
5385 "caf_get", tmp_expr
->where
, 1, tmp_expr
);
5386 wrapper
->ts
= e
->ts
;
5387 wrapper
->rank
= e
->rank
;
5389 wrapper
->shape
= gfc_copy_shape (e
->shape
, e
->rank
);
5396 remove_caf_get_intrinsic (gfc_expr
*e
)
5398 gcc_assert (e
->expr_type
== EXPR_FUNCTION
&& e
->value
.function
.isym
5399 && e
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
);
5400 gfc_expr
*e2
= e
->value
.function
.actual
->expr
;
5401 e
->value
.function
.actual
->expr
= NULL
;
5402 gfc_free_actual_arglist (e
->value
.function
.actual
);
5403 gfc_free_shape (&e
->shape
, e
->rank
);
5409 /* Resolve a variable expression. */
5412 resolve_variable (gfc_expr
*e
)
5419 if (e
->symtree
== NULL
)
5421 sym
= e
->symtree
->n
.sym
;
5423 /* Use same check as for TYPE(*) below; this check has to be before TYPE(*)
5424 as ts.type is set to BT_ASSUMED in resolve_symbol. */
5425 if (sym
->attr
.ext_attr
& (1 << EXT_ATTR_NO_ARG_CHECK
))
5427 if (!actual_arg
|| inquiry_argument
)
5429 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute may only "
5430 "be used as actual argument", sym
->name
, &e
->where
);
5434 /* TS 29113, 407b. */
5435 else if (e
->ts
.type
== BT_ASSUMED
)
5439 gfc_error ("Assumed-type variable %s at %L may only be used "
5440 "as actual argument", sym
->name
, &e
->where
);
5443 else if (inquiry_argument
&& !first_actual_arg
)
5445 /* FIXME: It doesn't work reliably as inquiry_argument is not set
5446 for all inquiry functions in resolve_function; the reason is
5447 that the function-name resolution happens too late in that
5449 gfc_error ("Assumed-type variable %s at %L as actual argument to "
5450 "an inquiry function shall be the first argument",
5451 sym
->name
, &e
->where
);
5455 /* TS 29113, C535b. */
5456 else if (((sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
5457 && CLASS_DATA (sym
)->as
5458 && CLASS_DATA (sym
)->as
->type
== AS_ASSUMED_RANK
)
5459 || (sym
->ts
.type
!= BT_CLASS
&& sym
->as
5460 && sym
->as
->type
== AS_ASSUMED_RANK
))
5461 && !sym
->attr
.select_rank_temporary
)
5464 && !(cs_base
&& cs_base
->current
5465 && cs_base
->current
->op
== EXEC_SELECT_RANK
))
5467 gfc_error ("Assumed-rank variable %s at %L may only be used as "
5468 "actual argument", sym
->name
, &e
->where
);
5471 else if (inquiry_argument
&& !first_actual_arg
)
5473 /* FIXME: It doesn't work reliably as inquiry_argument is not set
5474 for all inquiry functions in resolve_function; the reason is
5475 that the function-name resolution happens too late in that
5477 gfc_error ("Assumed-rank variable %s at %L as actual argument "
5478 "to an inquiry function shall be the first argument",
5479 sym
->name
, &e
->where
);
5484 if ((sym
->attr
.ext_attr
& (1 << EXT_ATTR_NO_ARG_CHECK
)) && e
->ref
5485 && !(e
->ref
->type
== REF_ARRAY
&& e
->ref
->u
.ar
.type
== AR_FULL
5486 && e
->ref
->next
== NULL
))
5488 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute shall not have "
5489 "a subobject reference", sym
->name
, &e
->ref
->u
.ar
.where
);
5492 /* TS 29113, 407b. */
5493 else if (e
->ts
.type
== BT_ASSUMED
&& e
->ref
5494 && !(e
->ref
->type
== REF_ARRAY
&& e
->ref
->u
.ar
.type
== AR_FULL
5495 && e
->ref
->next
== NULL
))
5497 gfc_error ("Assumed-type variable %s at %L shall not have a subobject "
5498 "reference", sym
->name
, &e
->ref
->u
.ar
.where
);
5502 /* TS 29113, C535b. */
5503 if (((sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
5504 && CLASS_DATA (sym
)->as
5505 && CLASS_DATA (sym
)->as
->type
== AS_ASSUMED_RANK
)
5506 || (sym
->ts
.type
!= BT_CLASS
&& sym
->as
5507 && sym
->as
->type
== AS_ASSUMED_RANK
))
5509 && !(e
->ref
->type
== REF_ARRAY
&& e
->ref
->u
.ar
.type
== AR_FULL
5510 && e
->ref
->next
== NULL
))
5512 gfc_error ("Assumed-rank variable %s at %L shall not have a subobject "
5513 "reference", sym
->name
, &e
->ref
->u
.ar
.where
);
5517 /* For variables that are used in an associate (target => object) where
5518 the object's basetype is array valued while the target is scalar,
5519 the ts' type of the component refs is still array valued, which
5520 can't be translated that way. */
5521 if (sym
->assoc
&& e
->rank
== 0 && e
->ref
&& sym
->ts
.type
== BT_CLASS
5522 && sym
->assoc
->target
&& sym
->assoc
->target
->ts
.type
== BT_CLASS
5523 && CLASS_DATA (sym
->assoc
->target
)->as
)
5525 gfc_ref
*ref
= e
->ref
;
5531 ref
->u
.c
.sym
= sym
->ts
.u
.derived
;
5532 /* Stop the loop. */
5542 /* If this is an associate-name, it may be parsed with an array reference
5543 in error even though the target is scalar. Fail directly in this case.
5544 TODO Understand why class scalar expressions must be excluded. */
5545 if (sym
->assoc
&& !(sym
->ts
.type
== BT_CLASS
&& e
->rank
== 0))
5547 if (sym
->ts
.type
== BT_CLASS
)
5548 gfc_fix_class_refs (e
);
5549 if (!sym
->attr
.dimension
&& e
->ref
&& e
->ref
->type
== REF_ARRAY
)
5551 else if (sym
->attr
.dimension
&& (!e
->ref
|| e
->ref
->type
!= REF_ARRAY
))
5553 /* This can happen because the parser did not detect that the
5554 associate name is an array and the expression had no array
5556 gfc_ref
*ref
= gfc_get_ref ();
5557 ref
->type
= REF_ARRAY
;
5558 ref
->u
.ar
= *gfc_get_array_ref();
5559 ref
->u
.ar
.type
= AR_FULL
;
5562 ref
->u
.ar
.as
= sym
->as
;
5563 ref
->u
.ar
.dimen
= sym
->as
->rank
;
5571 if (sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
->attr
.generic
)
5572 sym
->ts
.u
.derived
= gfc_find_dt_in_generic (sym
->ts
.u
.derived
);
5574 /* On the other hand, the parser may not have known this is an array;
5575 in this case, we have to add a FULL reference. */
5576 if (sym
->assoc
&& sym
->attr
.dimension
&& !e
->ref
)
5578 e
->ref
= gfc_get_ref ();
5579 e
->ref
->type
= REF_ARRAY
;
5580 e
->ref
->u
.ar
.type
= AR_FULL
;
5581 e
->ref
->u
.ar
.dimen
= 0;
5584 /* Like above, but for class types, where the checking whether an array
5585 ref is present is more complicated. Furthermore make sure not to add
5586 the full array ref to _vptr or _len refs. */
5587 if (sym
->assoc
&& sym
->ts
.type
== BT_CLASS
5588 && CLASS_DATA (sym
)->attr
.dimension
5589 && (e
->ts
.type
!= BT_DERIVED
|| !e
->ts
.u
.derived
->attr
.vtype
))
5591 gfc_ref
*ref
, *newref
;
5593 newref
= gfc_get_ref ();
5594 newref
->type
= REF_ARRAY
;
5595 newref
->u
.ar
.type
= AR_FULL
;
5596 newref
->u
.ar
.dimen
= 0;
5597 /* Because this is an associate var and the first ref either is a ref to
5598 the _data component or not, no traversal of the ref chain is
5599 needed. The array ref needs to be inserted after the _data ref,
5600 or when that is not present, which may happend for polymorphic
5601 types, then at the first position. */
5605 else if (ref
->type
== REF_COMPONENT
5606 && strcmp ("_data", ref
->u
.c
.component
->name
) == 0)
5608 if (!ref
->next
|| ref
->next
->type
!= REF_ARRAY
)
5610 newref
->next
= ref
->next
;
5614 /* Array ref present already. */
5615 gfc_free_ref_list (newref
);
5617 else if (ref
->type
== REF_ARRAY
)
5618 /* Array ref present already. */
5619 gfc_free_ref_list (newref
);
5627 if (e
->ref
&& !resolve_ref (e
))
5630 if (sym
->attr
.flavor
== FL_PROCEDURE
5631 && (!sym
->attr
.function
5632 || (sym
->attr
.function
&& sym
->result
5633 && sym
->result
->attr
.proc_pointer
5634 && !sym
->result
->attr
.function
)))
5636 e
->ts
.type
= BT_PROCEDURE
;
5637 goto resolve_procedure
;
5640 if (sym
->ts
.type
!= BT_UNKNOWN
)
5641 gfc_variable_attr (e
, &e
->ts
);
5642 else if (sym
->attr
.flavor
== FL_PROCEDURE
5643 && sym
->attr
.function
&& sym
->result
5644 && sym
->result
->ts
.type
!= BT_UNKNOWN
5645 && sym
->result
->attr
.proc_pointer
)
5646 e
->ts
= sym
->result
->ts
;
5649 /* Must be a simple variable reference. */
5650 if (!gfc_set_default_type (sym
, 1, sym
->ns
))
5655 if (check_assumed_size_reference (sym
, e
))
5658 /* Deal with forward references to entries during gfc_resolve_code, to
5659 satisfy, at least partially, 12.5.2.5. */
5660 if (gfc_current_ns
->entries
5661 && current_entry_id
== sym
->entry_id
5664 && cs_base
->current
->op
!= EXEC_ENTRY
)
5666 gfc_entry_list
*entry
;
5667 gfc_formal_arglist
*formal
;
5669 bool seen
, saved_specification_expr
;
5671 /* If the symbol is a dummy... */
5672 if (sym
->attr
.dummy
&& sym
->ns
== gfc_current_ns
)
5674 entry
= gfc_current_ns
->entries
;
5677 /* ...test if the symbol is a parameter of previous entries. */
5678 for (; entry
&& entry
->id
<= current_entry_id
; entry
= entry
->next
)
5679 for (formal
= entry
->sym
->formal
; formal
; formal
= formal
->next
)
5681 if (formal
->sym
&& sym
->name
== formal
->sym
->name
)
5688 /* If it has not been seen as a dummy, this is an error. */
5691 if (specification_expr
)
5692 gfc_error ("Variable %qs, used in a specification expression"
5693 ", is referenced at %L before the ENTRY statement "
5694 "in which it is a parameter",
5695 sym
->name
, &cs_base
->current
->loc
);
5697 gfc_error ("Variable %qs is used at %L before the ENTRY "
5698 "statement in which it is a parameter",
5699 sym
->name
, &cs_base
->current
->loc
);
5704 /* Now do the same check on the specification expressions. */
5705 saved_specification_expr
= specification_expr
;
5706 specification_expr
= true;
5707 if (sym
->ts
.type
== BT_CHARACTER
5708 && !gfc_resolve_expr (sym
->ts
.u
.cl
->length
))
5712 for (n
= 0; n
< sym
->as
->rank
; n
++)
5714 if (!gfc_resolve_expr (sym
->as
->lower
[n
]))
5716 if (!gfc_resolve_expr (sym
->as
->upper
[n
]))
5719 specification_expr
= saved_specification_expr
;
5722 /* Update the symbol's entry level. */
5723 sym
->entry_id
= current_entry_id
+ 1;
5726 /* If a symbol has been host_associated mark it. This is used latter,
5727 to identify if aliasing is possible via host association. */
5728 if (sym
->attr
.flavor
== FL_VARIABLE
5729 && gfc_current_ns
->parent
5730 && (gfc_current_ns
->parent
== sym
->ns
5731 || (gfc_current_ns
->parent
->parent
5732 && gfc_current_ns
->parent
->parent
== sym
->ns
)))
5733 sym
->attr
.host_assoc
= 1;
5735 if (gfc_current_ns
->proc_name
5736 && sym
->attr
.dimension
5737 && (sym
->ns
!= gfc_current_ns
5738 || sym
->attr
.use_assoc
5739 || sym
->attr
.in_common
))
5740 gfc_current_ns
->proc_name
->attr
.array_outer_dependency
= 1;
5743 if (t
&& !resolve_procedure_expression (e
))
5746 /* F2008, C617 and C1229. */
5747 if (!inquiry_argument
&& (e
->ts
.type
== BT_CLASS
|| e
->ts
.type
== BT_DERIVED
)
5748 && gfc_is_coindexed (e
))
5750 gfc_ref
*ref
, *ref2
= NULL
;
5752 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
5754 if (ref
->type
== REF_COMPONENT
)
5756 if (ref
->type
== REF_ARRAY
&& ref
->u
.ar
.codimen
> 0)
5760 for ( ; ref
; ref
= ref
->next
)
5761 if (ref
->type
== REF_COMPONENT
)
5764 /* Expression itself is not coindexed object. */
5765 if (ref
&& e
->ts
.type
== BT_CLASS
)
5767 gfc_error ("Polymorphic subobject of coindexed object at %L",
5772 /* Expression itself is coindexed object. */
5776 c
= ref2
? ref2
->u
.c
.component
: e
->symtree
->n
.sym
->components
;
5777 for ( ; c
; c
= c
->next
)
5778 if (c
->attr
.allocatable
&& c
->ts
.type
== BT_CLASS
)
5780 gfc_error ("Coindexed object with polymorphic allocatable "
5781 "subcomponent at %L", &e
->where
);
5789 expression_rank (e
);
5791 if (t
&& flag_coarray
== GFC_FCOARRAY_LIB
&& gfc_is_coindexed (e
))
5792 add_caf_get_intrinsic (e
);
5794 /* Simplify cases where access to a parameter array results in a
5795 single constant. Suppress errors since those will have been
5796 issued before, as warnings. */
5797 if (e
->rank
== 0 && sym
->as
&& sym
->attr
.flavor
== FL_PARAMETER
)
5799 gfc_push_suppress_errors ();
5800 gfc_simplify_expr (e
, 1);
5801 gfc_pop_suppress_errors ();
5808 /* Checks to see that the correct symbol has been host associated.
5809 The only situation where this arises is that in which a twice
5810 contained function is parsed after the host association is made.
5811 Therefore, on detecting this, change the symbol in the expression
5812 and convert the array reference into an actual arglist if the old
5813 symbol is a variable. */
5815 check_host_association (gfc_expr
*e
)
5817 gfc_symbol
*sym
, *old_sym
;
5821 gfc_actual_arglist
*arg
, *tail
= NULL
;
5822 bool retval
= e
->expr_type
== EXPR_FUNCTION
;
5824 /* If the expression is the result of substitution in
5825 interface.c(gfc_extend_expr) because there is no way in
5826 which the host association can be wrong. */
5827 if (e
->symtree
== NULL
5828 || e
->symtree
->n
.sym
== NULL
5829 || e
->user_operator
)
5832 old_sym
= e
->symtree
->n
.sym
;
5834 if (gfc_current_ns
->parent
5835 && old_sym
->ns
!= gfc_current_ns
)
5837 /* Use the 'USE' name so that renamed module symbols are
5838 correctly handled. */
5839 gfc_find_symbol (e
->symtree
->name
, gfc_current_ns
, 1, &sym
);
5841 if (sym
&& old_sym
!= sym
5842 && sym
->ts
.type
== old_sym
->ts
.type
5843 && sym
->attr
.flavor
== FL_PROCEDURE
5844 && sym
->attr
.contained
)
5846 /* Clear the shape, since it might not be valid. */
5847 gfc_free_shape (&e
->shape
, e
->rank
);
5849 /* Give the expression the right symtree! */
5850 gfc_find_sym_tree (e
->symtree
->name
, NULL
, 1, &st
);
5851 gcc_assert (st
!= NULL
);
5853 if (old_sym
->attr
.flavor
== FL_PROCEDURE
5854 || e
->expr_type
== EXPR_FUNCTION
)
5856 /* Original was function so point to the new symbol, since
5857 the actual argument list is already attached to the
5859 e
->value
.function
.esym
= NULL
;
5864 /* Original was variable so convert array references into
5865 an actual arglist. This does not need any checking now
5866 since resolve_function will take care of it. */
5867 e
->value
.function
.actual
= NULL
;
5868 e
->expr_type
= EXPR_FUNCTION
;
5871 /* Ambiguity will not arise if the array reference is not
5872 the last reference. */
5873 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
5874 if (ref
->type
== REF_ARRAY
&& ref
->next
== NULL
)
5877 gcc_assert (ref
->type
== REF_ARRAY
);
5879 /* Grab the start expressions from the array ref and
5880 copy them into actual arguments. */
5881 for (n
= 0; n
< ref
->u
.ar
.dimen
; n
++)
5883 arg
= gfc_get_actual_arglist ();
5884 arg
->expr
= gfc_copy_expr (ref
->u
.ar
.start
[n
]);
5885 if (e
->value
.function
.actual
== NULL
)
5886 tail
= e
->value
.function
.actual
= arg
;
5894 /* Dump the reference list and set the rank. */
5895 gfc_free_ref_list (e
->ref
);
5897 e
->rank
= sym
->as
? sym
->as
->rank
: 0;
5900 gfc_resolve_expr (e
);
5904 /* This might have changed! */
5905 return e
->expr_type
== EXPR_FUNCTION
;
5910 gfc_resolve_character_operator (gfc_expr
*e
)
5912 gfc_expr
*op1
= e
->value
.op
.op1
;
5913 gfc_expr
*op2
= e
->value
.op
.op2
;
5914 gfc_expr
*e1
= NULL
;
5915 gfc_expr
*e2
= NULL
;
5917 gcc_assert (e
->value
.op
.op
== INTRINSIC_CONCAT
);
5919 if (op1
->ts
.u
.cl
&& op1
->ts
.u
.cl
->length
)
5920 e1
= gfc_copy_expr (op1
->ts
.u
.cl
->length
);
5921 else if (op1
->expr_type
== EXPR_CONSTANT
)
5922 e1
= gfc_get_int_expr (gfc_charlen_int_kind
, NULL
,
5923 op1
->value
.character
.length
);
5925 if (op2
->ts
.u
.cl
&& op2
->ts
.u
.cl
->length
)
5926 e2
= gfc_copy_expr (op2
->ts
.u
.cl
->length
);
5927 else if (op2
->expr_type
== EXPR_CONSTANT
)
5928 e2
= gfc_get_int_expr (gfc_charlen_int_kind
, NULL
,
5929 op2
->value
.character
.length
);
5931 e
->ts
.u
.cl
= gfc_new_charlen (gfc_current_ns
, NULL
);
5941 e
->ts
.u
.cl
->length
= gfc_add (e1
, e2
);
5942 e
->ts
.u
.cl
->length
->ts
.type
= BT_INTEGER
;
5943 e
->ts
.u
.cl
->length
->ts
.kind
= gfc_charlen_int_kind
;
5944 gfc_simplify_expr (e
->ts
.u
.cl
->length
, 0);
5945 gfc_resolve_expr (e
->ts
.u
.cl
->length
);
5951 /* Ensure that an character expression has a charlen and, if possible, a
5952 length expression. */
5955 fixup_charlen (gfc_expr
*e
)
5957 /* The cases fall through so that changes in expression type and the need
5958 for multiple fixes are picked up. In all circumstances, a charlen should
5959 be available for the middle end to hang a backend_decl on. */
5960 switch (e
->expr_type
)
5963 gfc_resolve_character_operator (e
);
5967 if (e
->expr_type
== EXPR_ARRAY
)
5968 gfc_resolve_character_array_constructor (e
);
5971 case EXPR_SUBSTRING
:
5972 if (!e
->ts
.u
.cl
&& e
->ref
)
5973 gfc_resolve_substring_charlen (e
);
5978 e
->ts
.u
.cl
= gfc_new_charlen (gfc_current_ns
, NULL
);
5985 /* Update an actual argument to include the passed-object for type-bound
5986 procedures at the right position. */
5988 static gfc_actual_arglist
*
5989 update_arglist_pass (gfc_actual_arglist
* lst
, gfc_expr
* po
, unsigned argpos
,
5992 gcc_assert (argpos
> 0);
5996 gfc_actual_arglist
* result
;
5998 result
= gfc_get_actual_arglist ();
6002 result
->name
= name
;
6008 lst
->next
= update_arglist_pass (lst
->next
, po
, argpos
- 1, name
);
6010 lst
= update_arglist_pass (NULL
, po
, argpos
- 1, name
);
6015 /* Extract the passed-object from an EXPR_COMPCALL (a copy of it). */
6018 extract_compcall_passed_object (gfc_expr
* e
)
6022 if (e
->expr_type
== EXPR_UNKNOWN
)
6024 gfc_error ("Error in typebound call at %L",
6029 gcc_assert (e
->expr_type
== EXPR_COMPCALL
);
6031 if (e
->value
.compcall
.base_object
)
6032 po
= gfc_copy_expr (e
->value
.compcall
.base_object
);
6035 po
= gfc_get_expr ();
6036 po
->expr_type
= EXPR_VARIABLE
;
6037 po
->symtree
= e
->symtree
;
6038 po
->ref
= gfc_copy_ref (e
->ref
);
6039 po
->where
= e
->where
;
6042 if (!gfc_resolve_expr (po
))
6049 /* Update the arglist of an EXPR_COMPCALL expression to include the
6053 update_compcall_arglist (gfc_expr
* e
)
6056 gfc_typebound_proc
* tbp
;
6058 tbp
= e
->value
.compcall
.tbp
;
6063 po
= extract_compcall_passed_object (e
);
6067 if (tbp
->nopass
|| e
->value
.compcall
.ignore_pass
)
6073 if (tbp
->pass_arg_num
<= 0)
6076 e
->value
.compcall
.actual
= update_arglist_pass (e
->value
.compcall
.actual
, po
,
6084 /* Extract the passed object from a PPC call (a copy of it). */
6087 extract_ppc_passed_object (gfc_expr
*e
)
6092 po
= gfc_get_expr ();
6093 po
->expr_type
= EXPR_VARIABLE
;
6094 po
->symtree
= e
->symtree
;
6095 po
->ref
= gfc_copy_ref (e
->ref
);
6096 po
->where
= e
->where
;
6098 /* Remove PPC reference. */
6100 while ((*ref
)->next
)
6101 ref
= &(*ref
)->next
;
6102 gfc_free_ref_list (*ref
);
6105 if (!gfc_resolve_expr (po
))
6112 /* Update the actual arglist of a procedure pointer component to include the
6116 update_ppc_arglist (gfc_expr
* e
)
6120 gfc_typebound_proc
* tb
;
6122 ppc
= gfc_get_proc_ptr_comp (e
);
6130 else if (tb
->nopass
)
6133 po
= extract_ppc_passed_object (e
);
6140 gfc_error ("Passed-object at %L must be scalar", &e
->where
);
6145 if (po
->ts
.type
== BT_DERIVED
&& po
->ts
.u
.derived
->attr
.abstract
)
6147 gfc_error ("Base object for procedure-pointer component call at %L is of"
6148 " ABSTRACT type %qs", &e
->where
, po
->ts
.u
.derived
->name
);
6152 gcc_assert (tb
->pass_arg_num
> 0);
6153 e
->value
.compcall
.actual
= update_arglist_pass (e
->value
.compcall
.actual
, po
,
6161 /* Check that the object a TBP is called on is valid, i.e. it must not be
6162 of ABSTRACT type (as in subobject%abstract_parent%tbp()). */
6165 check_typebound_baseobject (gfc_expr
* e
)
6168 bool return_value
= false;
6170 base
= extract_compcall_passed_object (e
);
6174 if (base
->ts
.type
!= BT_DERIVED
&& base
->ts
.type
!= BT_CLASS
)
6176 gfc_error ("Error in typebound call at %L", &e
->where
);
6180 if (base
->ts
.type
== BT_CLASS
&& !gfc_expr_attr (base
).class_ok
)
6184 if (base
->ts
.type
== BT_DERIVED
&& base
->ts
.u
.derived
->attr
.abstract
)
6186 gfc_error ("Base object for type-bound procedure call at %L is of"
6187 " ABSTRACT type %qs", &e
->where
, base
->ts
.u
.derived
->name
);
6191 /* F08:C1230. If the procedure called is NOPASS,
6192 the base object must be scalar. */
6193 if (e
->value
.compcall
.tbp
->nopass
&& base
->rank
!= 0)
6195 gfc_error ("Base object for NOPASS type-bound procedure call at %L must"
6196 " be scalar", &e
->where
);
6200 return_value
= true;
6203 gfc_free_expr (base
);
6204 return return_value
;
6208 /* Resolve a call to a type-bound procedure, either function or subroutine,
6209 statically from the data in an EXPR_COMPCALL expression. The adapted
6210 arglist and the target-procedure symtree are returned. */
6213 resolve_typebound_static (gfc_expr
* e
, gfc_symtree
** target
,
6214 gfc_actual_arglist
** actual
)
6216 gcc_assert (e
->expr_type
== EXPR_COMPCALL
);
6217 gcc_assert (!e
->value
.compcall
.tbp
->is_generic
);
6219 /* Update the actual arglist for PASS. */
6220 if (!update_compcall_arglist (e
))
6223 *actual
= e
->value
.compcall
.actual
;
6224 *target
= e
->value
.compcall
.tbp
->u
.specific
;
6226 gfc_free_ref_list (e
->ref
);
6228 e
->value
.compcall
.actual
= NULL
;
6230 /* If we find a deferred typebound procedure, check for derived types
6231 that an overriding typebound procedure has not been missed. */
6232 if (e
->value
.compcall
.name
6233 && !e
->value
.compcall
.tbp
->non_overridable
6234 && e
->value
.compcall
.base_object
6235 && e
->value
.compcall
.base_object
->ts
.type
== BT_DERIVED
)
6238 gfc_symbol
*derived
;
6240 /* Use the derived type of the base_object. */
6241 derived
= e
->value
.compcall
.base_object
->ts
.u
.derived
;
6244 /* If necessary, go through the inheritance chain. */
6245 while (!st
&& derived
)
6247 /* Look for the typebound procedure 'name'. */
6248 if (derived
->f2k_derived
&& derived
->f2k_derived
->tb_sym_root
)
6249 st
= gfc_find_symtree (derived
->f2k_derived
->tb_sym_root
,
6250 e
->value
.compcall
.name
);
6252 derived
= gfc_get_derived_super_type (derived
);
6255 /* Now find the specific name in the derived type namespace. */
6256 if (st
&& st
->n
.tb
&& st
->n
.tb
->u
.specific
)
6257 gfc_find_sym_tree (st
->n
.tb
->u
.specific
->name
,
6258 derived
->ns
, 1, &st
);
6266 /* Get the ultimate declared type from an expression. In addition,
6267 return the last class/derived type reference and the copy of the
6268 reference list. If check_types is set true, derived types are
6269 identified as well as class references. */
6271 get_declared_from_expr (gfc_ref
**class_ref
, gfc_ref
**new_ref
,
6272 gfc_expr
*e
, bool check_types
)
6274 gfc_symbol
*declared
;
6281 *new_ref
= gfc_copy_ref (e
->ref
);
6283 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
6285 if (ref
->type
!= REF_COMPONENT
)
6288 if ((ref
->u
.c
.component
->ts
.type
== BT_CLASS
6289 || (check_types
&& gfc_bt_struct (ref
->u
.c
.component
->ts
.type
)))
6290 && ref
->u
.c
.component
->attr
.flavor
!= FL_PROCEDURE
)
6292 declared
= ref
->u
.c
.component
->ts
.u
.derived
;
6298 if (declared
== NULL
)
6299 declared
= e
->symtree
->n
.sym
->ts
.u
.derived
;
6305 /* Given an EXPR_COMPCALL calling a GENERIC typebound procedure, figure out
6306 which of the specific bindings (if any) matches the arglist and transform
6307 the expression into a call of that binding. */
6310 resolve_typebound_generic_call (gfc_expr
* e
, const char **name
)
6312 gfc_typebound_proc
* genproc
;
6313 const char* genname
;
6315 gfc_symbol
*derived
;
6317 gcc_assert (e
->expr_type
== EXPR_COMPCALL
);
6318 genname
= e
->value
.compcall
.name
;
6319 genproc
= e
->value
.compcall
.tbp
;
6321 if (!genproc
->is_generic
)
6324 /* Try the bindings on this type and in the inheritance hierarchy. */
6325 for (; genproc
; genproc
= genproc
->overridden
)
6329 gcc_assert (genproc
->is_generic
);
6330 for (g
= genproc
->u
.generic
; g
; g
= g
->next
)
6333 gfc_actual_arglist
* args
;
6336 gcc_assert (g
->specific
);
6338 if (g
->specific
->error
)
6341 target
= g
->specific
->u
.specific
->n
.sym
;
6343 /* Get the right arglist by handling PASS/NOPASS. */
6344 args
= gfc_copy_actual_arglist (e
->value
.compcall
.actual
);
6345 if (!g
->specific
->nopass
)
6348 po
= extract_compcall_passed_object (e
);
6351 gfc_free_actual_arglist (args
);
6355 gcc_assert (g
->specific
->pass_arg_num
> 0);
6356 gcc_assert (!g
->specific
->error
);
6357 args
= update_arglist_pass (args
, po
, g
->specific
->pass_arg_num
,
6358 g
->specific
->pass_arg
);
6360 resolve_actual_arglist (args
, target
->attr
.proc
,
6361 is_external_proc (target
)
6362 && gfc_sym_get_dummy_args (target
) == NULL
);
6364 /* Check if this arglist matches the formal. */
6365 matches
= gfc_arglist_matches_symbol (&args
, target
);
6367 /* Clean up and break out of the loop if we've found it. */
6368 gfc_free_actual_arglist (args
);
6371 e
->value
.compcall
.tbp
= g
->specific
;
6372 genname
= g
->specific_st
->name
;
6373 /* Pass along the name for CLASS methods, where the vtab
6374 procedure pointer component has to be referenced. */
6382 /* Nothing matching found! */
6383 gfc_error ("Found no matching specific binding for the call to the GENERIC"
6384 " %qs at %L", genname
, &e
->where
);
6388 /* Make sure that we have the right specific instance for the name. */
6389 derived
= get_declared_from_expr (NULL
, NULL
, e
, true);
6391 st
= gfc_find_typebound_proc (derived
, NULL
, genname
, true, &e
->where
);
6393 e
->value
.compcall
.tbp
= st
->n
.tb
;
6399 /* Resolve a call to a type-bound subroutine. */
6402 resolve_typebound_call (gfc_code
* c
, const char **name
, bool *overridable
)
6404 gfc_actual_arglist
* newactual
;
6405 gfc_symtree
* target
;
6407 /* Check that's really a SUBROUTINE. */
6408 if (!c
->expr1
->value
.compcall
.tbp
->subroutine
)
6410 if (!c
->expr1
->value
.compcall
.tbp
->is_generic
6411 && c
->expr1
->value
.compcall
.tbp
->u
.specific
6412 && c
->expr1
->value
.compcall
.tbp
->u
.specific
->n
.sym
6413 && c
->expr1
->value
.compcall
.tbp
->u
.specific
->n
.sym
->attr
.subroutine
)
6414 c
->expr1
->value
.compcall
.tbp
->subroutine
= 1;
6417 gfc_error ("%qs at %L should be a SUBROUTINE",
6418 c
->expr1
->value
.compcall
.name
, &c
->loc
);
6423 if (!check_typebound_baseobject (c
->expr1
))
6426 /* Pass along the name for CLASS methods, where the vtab
6427 procedure pointer component has to be referenced. */
6429 *name
= c
->expr1
->value
.compcall
.name
;
6431 if (!resolve_typebound_generic_call (c
->expr1
, name
))
6434 /* Pass along the NON_OVERRIDABLE attribute of the specific TBP. */
6436 *overridable
= !c
->expr1
->value
.compcall
.tbp
->non_overridable
;
6438 /* Transform into an ordinary EXEC_CALL for now. */
6440 if (!resolve_typebound_static (c
->expr1
, &target
, &newactual
))
6443 c
->ext
.actual
= newactual
;
6444 c
->symtree
= target
;
6445 c
->op
= (c
->expr1
->value
.compcall
.assign
? EXEC_ASSIGN_CALL
: EXEC_CALL
);
6447 gcc_assert (!c
->expr1
->ref
&& !c
->expr1
->value
.compcall
.actual
);
6449 gfc_free_expr (c
->expr1
);
6450 c
->expr1
= gfc_get_expr ();
6451 c
->expr1
->expr_type
= EXPR_FUNCTION
;
6452 c
->expr1
->symtree
= target
;
6453 c
->expr1
->where
= c
->loc
;
6455 return resolve_call (c
);
6459 /* Resolve a component-call expression. */
6461 resolve_compcall (gfc_expr
* e
, const char **name
)
6463 gfc_actual_arglist
* newactual
;
6464 gfc_symtree
* target
;
6466 /* Check that's really a FUNCTION. */
6467 if (!e
->value
.compcall
.tbp
->function
)
6469 gfc_error ("%qs at %L should be a FUNCTION",
6470 e
->value
.compcall
.name
, &e
->where
);
6475 /* These must not be assign-calls! */
6476 gcc_assert (!e
->value
.compcall
.assign
);
6478 if (!check_typebound_baseobject (e
))
6481 /* Pass along the name for CLASS methods, where the vtab
6482 procedure pointer component has to be referenced. */
6484 *name
= e
->value
.compcall
.name
;
6486 if (!resolve_typebound_generic_call (e
, name
))
6488 gcc_assert (!e
->value
.compcall
.tbp
->is_generic
);
6490 /* Take the rank from the function's symbol. */
6491 if (e
->value
.compcall
.tbp
->u
.specific
->n
.sym
->as
)
6492 e
->rank
= e
->value
.compcall
.tbp
->u
.specific
->n
.sym
->as
->rank
;
6494 /* For now, we simply transform it into an EXPR_FUNCTION call with the same
6495 arglist to the TBP's binding target. */
6497 if (!resolve_typebound_static (e
, &target
, &newactual
))
6500 e
->value
.function
.actual
= newactual
;
6501 e
->value
.function
.name
= NULL
;
6502 e
->value
.function
.esym
= target
->n
.sym
;
6503 e
->value
.function
.isym
= NULL
;
6504 e
->symtree
= target
;
6505 e
->ts
= target
->n
.sym
->ts
;
6506 e
->expr_type
= EXPR_FUNCTION
;
6508 /* Resolution is not necessary if this is a class subroutine; this
6509 function only has to identify the specific proc. Resolution of
6510 the call will be done next in resolve_typebound_call. */
6511 return gfc_resolve_expr (e
);
6515 static bool resolve_fl_derived (gfc_symbol
*sym
);
6518 /* Resolve a typebound function, or 'method'. First separate all
6519 the non-CLASS references by calling resolve_compcall directly. */
6522 resolve_typebound_function (gfc_expr
* e
)
6524 gfc_symbol
*declared
;
6536 /* Deal with typebound operators for CLASS objects. */
6537 expr
= e
->value
.compcall
.base_object
;
6538 overridable
= !e
->value
.compcall
.tbp
->non_overridable
;
6539 if (expr
&& expr
->ts
.type
== BT_CLASS
&& e
->value
.compcall
.name
)
6541 /* If the base_object is not a variable, the corresponding actual
6542 argument expression must be stored in e->base_expression so
6543 that the corresponding tree temporary can be used as the base
6544 object in gfc_conv_procedure_call. */
6545 if (expr
->expr_type
!= EXPR_VARIABLE
)
6547 gfc_actual_arglist
*args
;
6549 for (args
= e
->value
.function
.actual
; args
; args
= args
->next
)
6551 if (expr
== args
->expr
)
6556 /* Since the typebound operators are generic, we have to ensure
6557 that any delays in resolution are corrected and that the vtab
6560 declared
= ts
.u
.derived
;
6561 c
= gfc_find_component (declared
, "_vptr", true, true, NULL
);
6562 if (c
->ts
.u
.derived
== NULL
)
6563 c
->ts
.u
.derived
= gfc_find_derived_vtab (declared
);
6565 if (!resolve_compcall (e
, &name
))
6568 /* Use the generic name if it is there. */
6569 name
= name
? name
: e
->value
.function
.esym
->name
;
6570 e
->symtree
= expr
->symtree
;
6571 e
->ref
= gfc_copy_ref (expr
->ref
);
6572 get_declared_from_expr (&class_ref
, NULL
, e
, false);
6574 /* Trim away the extraneous references that emerge from nested
6575 use of interface.c (extend_expr). */
6576 if (class_ref
&& class_ref
->next
)
6578 gfc_free_ref_list (class_ref
->next
);
6579 class_ref
->next
= NULL
;
6581 else if (e
->ref
&& !class_ref
&& expr
->ts
.type
!= BT_CLASS
)
6583 gfc_free_ref_list (e
->ref
);
6587 gfc_add_vptr_component (e
);
6588 gfc_add_component_ref (e
, name
);
6589 e
->value
.function
.esym
= NULL
;
6590 if (expr
->expr_type
!= EXPR_VARIABLE
)
6591 e
->base_expr
= expr
;
6596 return resolve_compcall (e
, NULL
);
6598 if (!resolve_ref (e
))
6601 /* Get the CLASS declared type. */
6602 declared
= get_declared_from_expr (&class_ref
, &new_ref
, e
, true);
6604 if (!resolve_fl_derived (declared
))
6607 /* Weed out cases of the ultimate component being a derived type. */
6608 if ((class_ref
&& gfc_bt_struct (class_ref
->u
.c
.component
->ts
.type
))
6609 || (!class_ref
&& st
->n
.sym
->ts
.type
!= BT_CLASS
))
6611 gfc_free_ref_list (new_ref
);
6612 return resolve_compcall (e
, NULL
);
6615 c
= gfc_find_component (declared
, "_data", true, true, NULL
);
6617 /* Treat the call as if it is a typebound procedure, in order to roll
6618 out the correct name for the specific function. */
6619 if (!resolve_compcall (e
, &name
))
6621 gfc_free_ref_list (new_ref
);
6628 /* Convert the expression to a procedure pointer component call. */
6629 e
->value
.function
.esym
= NULL
;
6635 /* '_vptr' points to the vtab, which contains the procedure pointers. */
6636 gfc_add_vptr_component (e
);
6637 gfc_add_component_ref (e
, name
);
6639 /* Recover the typespec for the expression. This is really only
6640 necessary for generic procedures, where the additional call
6641 to gfc_add_component_ref seems to throw the collection of the
6642 correct typespec. */
6646 gfc_free_ref_list (new_ref
);
6651 /* Resolve a typebound subroutine, or 'method'. First separate all
6652 the non-CLASS references by calling resolve_typebound_call
6656 resolve_typebound_subroutine (gfc_code
*code
)
6658 gfc_symbol
*declared
;
6668 st
= code
->expr1
->symtree
;
6670 /* Deal with typebound operators for CLASS objects. */
6671 expr
= code
->expr1
->value
.compcall
.base_object
;
6672 overridable
= !code
->expr1
->value
.compcall
.tbp
->non_overridable
;
6673 if (expr
&& expr
->ts
.type
== BT_CLASS
&& code
->expr1
->value
.compcall
.name
)
6675 /* If the base_object is not a variable, the corresponding actual
6676 argument expression must be stored in e->base_expression so
6677 that the corresponding tree temporary can be used as the base
6678 object in gfc_conv_procedure_call. */
6679 if (expr
->expr_type
!= EXPR_VARIABLE
)
6681 gfc_actual_arglist
*args
;
6683 args
= code
->expr1
->value
.function
.actual
;
6684 for (; args
; args
= args
->next
)
6685 if (expr
== args
->expr
)
6689 /* Since the typebound operators are generic, we have to ensure
6690 that any delays in resolution are corrected and that the vtab
6692 declared
= expr
->ts
.u
.derived
;
6693 c
= gfc_find_component (declared
, "_vptr", true, true, NULL
);
6694 if (c
->ts
.u
.derived
== NULL
)
6695 c
->ts
.u
.derived
= gfc_find_derived_vtab (declared
);
6697 if (!resolve_typebound_call (code
, &name
, NULL
))
6700 /* Use the generic name if it is there. */
6701 name
= name
? name
: code
->expr1
->value
.function
.esym
->name
;
6702 code
->expr1
->symtree
= expr
->symtree
;
6703 code
->expr1
->ref
= gfc_copy_ref (expr
->ref
);
6705 /* Trim away the extraneous references that emerge from nested
6706 use of interface.c (extend_expr). */
6707 get_declared_from_expr (&class_ref
, NULL
, code
->expr1
, false);
6708 if (class_ref
&& class_ref
->next
)
6710 gfc_free_ref_list (class_ref
->next
);
6711 class_ref
->next
= NULL
;
6713 else if (code
->expr1
->ref
&& !class_ref
)
6715 gfc_free_ref_list (code
->expr1
->ref
);
6716 code
->expr1
->ref
= NULL
;
6719 /* Now use the procedure in the vtable. */
6720 gfc_add_vptr_component (code
->expr1
);
6721 gfc_add_component_ref (code
->expr1
, name
);
6722 code
->expr1
->value
.function
.esym
= NULL
;
6723 if (expr
->expr_type
!= EXPR_VARIABLE
)
6724 code
->expr1
->base_expr
= expr
;
6729 return resolve_typebound_call (code
, NULL
, NULL
);
6731 if (!resolve_ref (code
->expr1
))
6734 /* Get the CLASS declared type. */
6735 get_declared_from_expr (&class_ref
, &new_ref
, code
->expr1
, true);
6737 /* Weed out cases of the ultimate component being a derived type. */
6738 if ((class_ref
&& gfc_bt_struct (class_ref
->u
.c
.component
->ts
.type
))
6739 || (!class_ref
&& st
->n
.sym
->ts
.type
!= BT_CLASS
))
6741 gfc_free_ref_list (new_ref
);
6742 return resolve_typebound_call (code
, NULL
, NULL
);
6745 if (!resolve_typebound_call (code
, &name
, &overridable
))
6747 gfc_free_ref_list (new_ref
);
6750 ts
= code
->expr1
->ts
;
6754 /* Convert the expression to a procedure pointer component call. */
6755 code
->expr1
->value
.function
.esym
= NULL
;
6756 code
->expr1
->symtree
= st
;
6759 code
->expr1
->ref
= new_ref
;
6761 /* '_vptr' points to the vtab, which contains the procedure pointers. */
6762 gfc_add_vptr_component (code
->expr1
);
6763 gfc_add_component_ref (code
->expr1
, name
);
6765 /* Recover the typespec for the expression. This is really only
6766 necessary for generic procedures, where the additional call
6767 to gfc_add_component_ref seems to throw the collection of the
6768 correct typespec. */
6769 code
->expr1
->ts
= ts
;
6772 gfc_free_ref_list (new_ref
);
6778 /* Resolve a CALL to a Procedure Pointer Component (Subroutine). */
6781 resolve_ppc_call (gfc_code
* c
)
6783 gfc_component
*comp
;
6785 comp
= gfc_get_proc_ptr_comp (c
->expr1
);
6786 gcc_assert (comp
!= NULL
);
6788 c
->resolved_sym
= c
->expr1
->symtree
->n
.sym
;
6789 c
->expr1
->expr_type
= EXPR_VARIABLE
;
6791 if (!comp
->attr
.subroutine
)
6792 gfc_add_subroutine (&comp
->attr
, comp
->name
, &c
->expr1
->where
);
6794 if (!resolve_ref (c
->expr1
))
6797 if (!update_ppc_arglist (c
->expr1
))
6800 c
->ext
.actual
= c
->expr1
->value
.compcall
.actual
;
6802 if (!resolve_actual_arglist (c
->ext
.actual
, comp
->attr
.proc
,
6803 !(comp
->ts
.interface
6804 && comp
->ts
.interface
->formal
)))
6807 if (!pure_subroutine (comp
->ts
.interface
, comp
->name
, &c
->expr1
->where
))
6810 gfc_ppc_use (comp
, &c
->expr1
->value
.compcall
.actual
, &c
->expr1
->where
);
6816 /* Resolve a Function Call to a Procedure Pointer Component (Function). */
6819 resolve_expr_ppc (gfc_expr
* e
)
6821 gfc_component
*comp
;
6823 comp
= gfc_get_proc_ptr_comp (e
);
6824 gcc_assert (comp
!= NULL
);
6826 /* Convert to EXPR_FUNCTION. */
6827 e
->expr_type
= EXPR_FUNCTION
;
6828 e
->value
.function
.isym
= NULL
;
6829 e
->value
.function
.actual
= e
->value
.compcall
.actual
;
6831 if (comp
->as
!= NULL
)
6832 e
->rank
= comp
->as
->rank
;
6834 if (!comp
->attr
.function
)
6835 gfc_add_function (&comp
->attr
, comp
->name
, &e
->where
);
6837 if (!resolve_ref (e
))
6840 if (!resolve_actual_arglist (e
->value
.function
.actual
, comp
->attr
.proc
,
6841 !(comp
->ts
.interface
6842 && comp
->ts
.interface
->formal
)))
6845 if (!update_ppc_arglist (e
))
6848 if (!check_pure_function(e
))
6851 gfc_ppc_use (comp
, &e
->value
.compcall
.actual
, &e
->where
);
6858 gfc_is_expandable_expr (gfc_expr
*e
)
6860 gfc_constructor
*con
;
6862 if (e
->expr_type
== EXPR_ARRAY
)
6864 /* Traverse the constructor looking for variables that are flavor
6865 parameter. Parameters must be expanded since they are fully used at
6867 con
= gfc_constructor_first (e
->value
.constructor
);
6868 for (; con
; con
= gfc_constructor_next (con
))
6870 if (con
->expr
->expr_type
== EXPR_VARIABLE
6871 && con
->expr
->symtree
6872 && (con
->expr
->symtree
->n
.sym
->attr
.flavor
== FL_PARAMETER
6873 || con
->expr
->symtree
->n
.sym
->attr
.flavor
== FL_VARIABLE
))
6875 if (con
->expr
->expr_type
== EXPR_ARRAY
6876 && gfc_is_expandable_expr (con
->expr
))
6885 /* Sometimes variables in specification expressions of the result
6886 of module procedures in submodules wind up not being the 'real'
6887 dummy. Find this, if possible, in the namespace of the first
6891 fixup_unique_dummy (gfc_expr
*e
)
6893 gfc_symtree
*st
= NULL
;
6894 gfc_symbol
*s
= NULL
;
6896 if (e
->symtree
->n
.sym
->ns
->proc_name
6897 && e
->symtree
->n
.sym
->ns
->proc_name
->formal
)
6898 s
= e
->symtree
->n
.sym
->ns
->proc_name
->formal
->sym
;
6901 st
= gfc_find_symtree (s
->ns
->sym_root
, e
->symtree
->n
.sym
->name
);
6904 && st
->n
.sym
!= NULL
6905 && st
->n
.sym
->attr
.dummy
)
6909 /* Resolve an expression. That is, make sure that types of operands agree
6910 with their operators, intrinsic operators are converted to function calls
6911 for overloaded types and unresolved function references are resolved. */
6914 gfc_resolve_expr (gfc_expr
*e
)
6917 bool inquiry_save
, actual_arg_save
, first_actual_arg_save
;
6919 if (e
== NULL
|| e
->do_not_resolve_again
)
6922 /* inquiry_argument only applies to variables. */
6923 inquiry_save
= inquiry_argument
;
6924 actual_arg_save
= actual_arg
;
6925 first_actual_arg_save
= first_actual_arg
;
6927 if (e
->expr_type
!= EXPR_VARIABLE
)
6929 inquiry_argument
= false;
6931 first_actual_arg
= false;
6933 else if (e
->symtree
!= NULL
6934 && *e
->symtree
->name
== '@'
6935 && e
->symtree
->n
.sym
->attr
.dummy
)
6937 /* Deal with submodule specification expressions that are not
6938 found to be referenced in module.c(read_cleanup). */
6939 fixup_unique_dummy (e
);
6942 switch (e
->expr_type
)
6945 t
= resolve_operator (e
);
6951 if (check_host_association (e
))
6952 t
= resolve_function (e
);
6954 t
= resolve_variable (e
);
6956 if (e
->ts
.type
== BT_CHARACTER
&& e
->ts
.u
.cl
== NULL
&& e
->ref
6957 && e
->ref
->type
!= REF_SUBSTRING
)
6958 gfc_resolve_substring_charlen (e
);
6963 t
= resolve_typebound_function (e
);
6966 case EXPR_SUBSTRING
:
6967 t
= resolve_ref (e
);
6976 t
= resolve_expr_ppc (e
);
6981 if (!resolve_ref (e
))
6984 t
= gfc_resolve_array_constructor (e
);
6985 /* Also try to expand a constructor. */
6988 expression_rank (e
);
6989 if (gfc_is_constant_expr (e
) || gfc_is_expandable_expr (e
))
6990 gfc_expand_constructor (e
, false);
6993 /* This provides the opportunity for the length of constructors with
6994 character valued function elements to propagate the string length
6995 to the expression. */
6996 if (t
&& e
->ts
.type
== BT_CHARACTER
)
6998 /* For efficiency, we call gfc_expand_constructor for BT_CHARACTER
6999 here rather then add a duplicate test for it above. */
7000 gfc_expand_constructor (e
, false);
7001 t
= gfc_resolve_character_array_constructor (e
);
7006 case EXPR_STRUCTURE
:
7007 t
= resolve_ref (e
);
7011 t
= resolve_structure_cons (e
, 0);
7015 t
= gfc_simplify_expr (e
, 0);
7019 gfc_internal_error ("gfc_resolve_expr(): Bad expression type");
7022 if (e
->ts
.type
== BT_CHARACTER
&& t
&& !e
->ts
.u
.cl
)
7025 inquiry_argument
= inquiry_save
;
7026 actual_arg
= actual_arg_save
;
7027 first_actual_arg
= first_actual_arg_save
;
7029 /* For some reason, resolving these expressions a second time mangles
7030 the typespec of the expression itself. */
7031 if (t
&& e
->expr_type
== EXPR_VARIABLE
7032 && e
->symtree
->n
.sym
->attr
.select_rank_temporary
7033 && UNLIMITED_POLY (e
->symtree
->n
.sym
))
7034 e
->do_not_resolve_again
= 1;
7040 /* Resolve an expression from an iterator. They must be scalar and have
7041 INTEGER or (optionally) REAL type. */
7044 gfc_resolve_iterator_expr (gfc_expr
*expr
, bool real_ok
,
7045 const char *name_msgid
)
7047 if (!gfc_resolve_expr (expr
))
7050 if (expr
->rank
!= 0)
7052 gfc_error ("%s at %L must be a scalar", _(name_msgid
), &expr
->where
);
7056 if (expr
->ts
.type
!= BT_INTEGER
)
7058 if (expr
->ts
.type
== BT_REAL
)
7061 return gfc_notify_std (GFC_STD_F95_DEL
,
7062 "%s at %L must be integer",
7063 _(name_msgid
), &expr
->where
);
7066 gfc_error ("%s at %L must be INTEGER", _(name_msgid
),
7073 gfc_error ("%s at %L must be INTEGER", _(name_msgid
), &expr
->where
);
7081 /* Resolve the expressions in an iterator structure. If REAL_OK is
7082 false allow only INTEGER type iterators, otherwise allow REAL types.
7083 Set own_scope to true for ac-implied-do and data-implied-do as those
7084 have a separate scope such that, e.g., a INTENT(IN) doesn't apply. */
7087 gfc_resolve_iterator (gfc_iterator
*iter
, bool real_ok
, bool own_scope
)
7089 if (!gfc_resolve_iterator_expr (iter
->var
, real_ok
, "Loop variable"))
7092 if (!gfc_check_vardef_context (iter
->var
, false, false, own_scope
,
7093 _("iterator variable")))
7096 if (!gfc_resolve_iterator_expr (iter
->start
, real_ok
,
7097 "Start expression in DO loop"))
7100 if (!gfc_resolve_iterator_expr (iter
->end
, real_ok
,
7101 "End expression in DO loop"))
7104 if (!gfc_resolve_iterator_expr (iter
->step
, real_ok
,
7105 "Step expression in DO loop"))
7108 /* Convert start, end, and step to the same type as var. */
7109 if (iter
->start
->ts
.kind
!= iter
->var
->ts
.kind
7110 || iter
->start
->ts
.type
!= iter
->var
->ts
.type
)
7111 gfc_convert_type (iter
->start
, &iter
->var
->ts
, 1);
7113 if (iter
->end
->ts
.kind
!= iter
->var
->ts
.kind
7114 || iter
->end
->ts
.type
!= iter
->var
->ts
.type
)
7115 gfc_convert_type (iter
->end
, &iter
->var
->ts
, 1);
7117 if (iter
->step
->ts
.kind
!= iter
->var
->ts
.kind
7118 || iter
->step
->ts
.type
!= iter
->var
->ts
.type
)
7119 gfc_convert_type (iter
->step
, &iter
->var
->ts
, 1);
7121 if (iter
->step
->expr_type
== EXPR_CONSTANT
)
7123 if ((iter
->step
->ts
.type
== BT_INTEGER
7124 && mpz_cmp_ui (iter
->step
->value
.integer
, 0) == 0)
7125 || (iter
->step
->ts
.type
== BT_REAL
7126 && mpfr_sgn (iter
->step
->value
.real
) == 0))
7128 gfc_error ("Step expression in DO loop at %L cannot be zero",
7129 &iter
->step
->where
);
7134 if (iter
->start
->expr_type
== EXPR_CONSTANT
7135 && iter
->end
->expr_type
== EXPR_CONSTANT
7136 && iter
->step
->expr_type
== EXPR_CONSTANT
)
7139 if (iter
->start
->ts
.type
== BT_INTEGER
)
7141 sgn
= mpz_cmp_ui (iter
->step
->value
.integer
, 0);
7142 cmp
= mpz_cmp (iter
->end
->value
.integer
, iter
->start
->value
.integer
);
7146 sgn
= mpfr_sgn (iter
->step
->value
.real
);
7147 cmp
= mpfr_cmp (iter
->end
->value
.real
, iter
->start
->value
.real
);
7149 if (warn_zerotrip
&& ((sgn
> 0 && cmp
< 0) || (sgn
< 0 && cmp
> 0)))
7150 gfc_warning (OPT_Wzerotrip
,
7151 "DO loop at %L will be executed zero times",
7152 &iter
->step
->where
);
7155 if (iter
->end
->expr_type
== EXPR_CONSTANT
7156 && iter
->end
->ts
.type
== BT_INTEGER
7157 && iter
->step
->expr_type
== EXPR_CONSTANT
7158 && iter
->step
->ts
.type
== BT_INTEGER
7159 && (mpz_cmp_si (iter
->step
->value
.integer
, -1L) == 0
7160 || mpz_cmp_si (iter
->step
->value
.integer
, 1L) == 0))
7162 bool is_step_positive
= mpz_cmp_ui (iter
->step
->value
.integer
, 1) == 0;
7163 int k
= gfc_validate_kind (BT_INTEGER
, iter
->end
->ts
.kind
, false);
7165 if (is_step_positive
7166 && mpz_cmp (iter
->end
->value
.integer
, gfc_integer_kinds
[k
].huge
) == 0)
7167 gfc_warning (OPT_Wundefined_do_loop
,
7168 "DO loop at %L is undefined as it overflows",
7169 &iter
->step
->where
);
7170 else if (!is_step_positive
7171 && mpz_cmp (iter
->end
->value
.integer
,
7172 gfc_integer_kinds
[k
].min_int
) == 0)
7173 gfc_warning (OPT_Wundefined_do_loop
,
7174 "DO loop at %L is undefined as it underflows",
7175 &iter
->step
->where
);
7182 /* Traversal function for find_forall_index. f == 2 signals that
7183 that variable itself is not to be checked - only the references. */
7186 forall_index (gfc_expr
*expr
, gfc_symbol
*sym
, int *f
)
7188 if (expr
->expr_type
!= EXPR_VARIABLE
)
7191 /* A scalar assignment */
7192 if (!expr
->ref
|| *f
== 1)
7194 if (expr
->symtree
->n
.sym
== sym
)
7206 /* Check whether the FORALL index appears in the expression or not.
7207 Returns true if SYM is found in EXPR. */
7210 find_forall_index (gfc_expr
*expr
, gfc_symbol
*sym
, int f
)
7212 if (gfc_traverse_expr (expr
, sym
, forall_index
, f
))
7219 /* Resolve a list of FORALL iterators. The FORALL index-name is constrained
7220 to be a scalar INTEGER variable. The subscripts and stride are scalar
7221 INTEGERs, and if stride is a constant it must be nonzero.
7222 Furthermore "A subscript or stride in a forall-triplet-spec shall
7223 not contain a reference to any index-name in the
7224 forall-triplet-spec-list in which it appears." (7.5.4.1) */
7227 resolve_forall_iterators (gfc_forall_iterator
*it
)
7229 gfc_forall_iterator
*iter
, *iter2
;
7231 for (iter
= it
; iter
; iter
= iter
->next
)
7233 if (gfc_resolve_expr (iter
->var
)
7234 && (iter
->var
->ts
.type
!= BT_INTEGER
|| iter
->var
->rank
!= 0))
7235 gfc_error ("FORALL index-name at %L must be a scalar INTEGER",
7238 if (gfc_resolve_expr (iter
->start
)
7239 && (iter
->start
->ts
.type
!= BT_INTEGER
|| iter
->start
->rank
!= 0))
7240 gfc_error ("FORALL start expression at %L must be a scalar INTEGER",
7241 &iter
->start
->where
);
7242 if (iter
->var
->ts
.kind
!= iter
->start
->ts
.kind
)
7243 gfc_convert_type (iter
->start
, &iter
->var
->ts
, 1);
7245 if (gfc_resolve_expr (iter
->end
)
7246 && (iter
->end
->ts
.type
!= BT_INTEGER
|| iter
->end
->rank
!= 0))
7247 gfc_error ("FORALL end expression at %L must be a scalar INTEGER",
7249 if (iter
->var
->ts
.kind
!= iter
->end
->ts
.kind
)
7250 gfc_convert_type (iter
->end
, &iter
->var
->ts
, 1);
7252 if (gfc_resolve_expr (iter
->stride
))
7254 if (iter
->stride
->ts
.type
!= BT_INTEGER
|| iter
->stride
->rank
!= 0)
7255 gfc_error ("FORALL stride expression at %L must be a scalar %s",
7256 &iter
->stride
->where
, "INTEGER");
7258 if (iter
->stride
->expr_type
== EXPR_CONSTANT
7259 && mpz_cmp_ui (iter
->stride
->value
.integer
, 0) == 0)
7260 gfc_error ("FORALL stride expression at %L cannot be zero",
7261 &iter
->stride
->where
);
7263 if (iter
->var
->ts
.kind
!= iter
->stride
->ts
.kind
)
7264 gfc_convert_type (iter
->stride
, &iter
->var
->ts
, 1);
7267 for (iter
= it
; iter
; iter
= iter
->next
)
7268 for (iter2
= iter
; iter2
; iter2
= iter2
->next
)
7270 if (find_forall_index (iter2
->start
, iter
->var
->symtree
->n
.sym
, 0)
7271 || find_forall_index (iter2
->end
, iter
->var
->symtree
->n
.sym
, 0)
7272 || find_forall_index (iter2
->stride
, iter
->var
->symtree
->n
.sym
, 0))
7273 gfc_error ("FORALL index %qs may not appear in triplet "
7274 "specification at %L", iter
->var
->symtree
->name
,
7275 &iter2
->start
->where
);
7280 /* Given a pointer to a symbol that is a derived type, see if it's
7281 inaccessible, i.e. if it's defined in another module and the components are
7282 PRIVATE. The search is recursive if necessary. Returns zero if no
7283 inaccessible components are found, nonzero otherwise. */
7286 derived_inaccessible (gfc_symbol
*sym
)
7290 if (sym
->attr
.use_assoc
&& sym
->attr
.private_comp
)
7293 for (c
= sym
->components
; c
; c
= c
->next
)
7295 /* Prevent an infinite loop through this function. */
7296 if (c
->ts
.type
== BT_DERIVED
&& c
->attr
.pointer
7297 && sym
== c
->ts
.u
.derived
)
7300 if (c
->ts
.type
== BT_DERIVED
&& derived_inaccessible (c
->ts
.u
.derived
))
7308 /* Resolve the argument of a deallocate expression. The expression must be
7309 a pointer or a full array. */
7312 resolve_deallocate_expr (gfc_expr
*e
)
7314 symbol_attribute attr
;
7315 int allocatable
, pointer
;
7321 if (!gfc_resolve_expr (e
))
7324 if (e
->expr_type
!= EXPR_VARIABLE
)
7327 sym
= e
->symtree
->n
.sym
;
7328 unlimited
= UNLIMITED_POLY(sym
);
7330 if (sym
->ts
.type
== BT_CLASS
)
7332 allocatable
= CLASS_DATA (sym
)->attr
.allocatable
;
7333 pointer
= CLASS_DATA (sym
)->attr
.class_pointer
;
7337 allocatable
= sym
->attr
.allocatable
;
7338 pointer
= sym
->attr
.pointer
;
7340 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
7345 if (ref
->u
.ar
.type
!= AR_FULL
7346 && !(ref
->u
.ar
.type
== AR_ELEMENT
&& ref
->u
.ar
.as
->rank
== 0
7347 && ref
->u
.ar
.codimen
&& gfc_ref_this_image (ref
)))
7352 c
= ref
->u
.c
.component
;
7353 if (c
->ts
.type
== BT_CLASS
)
7355 allocatable
= CLASS_DATA (c
)->attr
.allocatable
;
7356 pointer
= CLASS_DATA (c
)->attr
.class_pointer
;
7360 allocatable
= c
->attr
.allocatable
;
7361 pointer
= c
->attr
.pointer
;
7372 attr
= gfc_expr_attr (e
);
7374 if (allocatable
== 0 && attr
.pointer
== 0 && !unlimited
)
7377 gfc_error ("Allocate-object at %L must be ALLOCATABLE or a POINTER",
7383 if (gfc_is_coindexed (e
))
7385 gfc_error ("Coindexed allocatable object at %L", &e
->where
);
7390 && !gfc_check_vardef_context (e
, true, true, false,
7391 _("DEALLOCATE object")))
7393 if (!gfc_check_vardef_context (e
, false, true, false,
7394 _("DEALLOCATE object")))
7401 /* Returns true if the expression e contains a reference to the symbol sym. */
7403 sym_in_expr (gfc_expr
*e
, gfc_symbol
*sym
, int *f ATTRIBUTE_UNUSED
)
7405 if (e
->expr_type
== EXPR_VARIABLE
&& e
->symtree
->n
.sym
== sym
)
7412 gfc_find_sym_in_expr (gfc_symbol
*sym
, gfc_expr
*e
)
7414 return gfc_traverse_expr (e
, sym
, sym_in_expr
, 0);
7418 /* Given the expression node e for an allocatable/pointer of derived type to be
7419 allocated, get the expression node to be initialized afterwards (needed for
7420 derived types with default initializers, and derived types with allocatable
7421 components that need nullification.) */
7424 gfc_expr_to_initialize (gfc_expr
*e
)
7430 result
= gfc_copy_expr (e
);
7432 /* Change the last array reference from AR_ELEMENT to AR_FULL. */
7433 for (ref
= result
->ref
; ref
; ref
= ref
->next
)
7434 if (ref
->type
== REF_ARRAY
&& ref
->next
== NULL
)
7436 if (ref
->u
.ar
.dimen
== 0
7437 && ref
->u
.ar
.as
&& ref
->u
.ar
.as
->corank
)
7440 ref
->u
.ar
.type
= AR_FULL
;
7442 for (i
= 0; i
< ref
->u
.ar
.dimen
; i
++)
7443 ref
->u
.ar
.start
[i
] = ref
->u
.ar
.end
[i
] = ref
->u
.ar
.stride
[i
] = NULL
;
7448 gfc_free_shape (&result
->shape
, result
->rank
);
7450 /* Recalculate rank, shape, etc. */
7451 gfc_resolve_expr (result
);
7456 /* If the last ref of an expression is an array ref, return a copy of the
7457 expression with that one removed. Otherwise, a copy of the original
7458 expression. This is used for allocate-expressions and pointer assignment
7459 LHS, where there may be an array specification that needs to be stripped
7460 off when using gfc_check_vardef_context. */
7463 remove_last_array_ref (gfc_expr
* e
)
7468 e2
= gfc_copy_expr (e
);
7469 for (r
= &e2
->ref
; *r
; r
= &(*r
)->next
)
7470 if ((*r
)->type
== REF_ARRAY
&& !(*r
)->next
)
7472 gfc_free_ref_list (*r
);
7481 /* Used in resolve_allocate_expr to check that a allocation-object and
7482 a source-expr are conformable. This does not catch all possible
7483 cases; in particular a runtime checking is needed. */
7486 conformable_arrays (gfc_expr
*e1
, gfc_expr
*e2
)
7489 for (tail
= e2
->ref
; tail
&& tail
->next
; tail
= tail
->next
);
7491 /* First compare rank. */
7492 if ((tail
&& (!tail
->u
.ar
.as
|| e1
->rank
!= tail
->u
.ar
.as
->rank
))
7493 || (!tail
&& e1
->rank
!= e2
->rank
))
7495 gfc_error ("Source-expr at %L must be scalar or have the "
7496 "same rank as the allocate-object at %L",
7497 &e1
->where
, &e2
->where
);
7508 for (i
= 0; i
< e1
->rank
; i
++)
7510 if (tail
->u
.ar
.start
[i
] == NULL
)
7513 if (tail
->u
.ar
.end
[i
])
7515 mpz_set (s
, tail
->u
.ar
.end
[i
]->value
.integer
);
7516 mpz_sub (s
, s
, tail
->u
.ar
.start
[i
]->value
.integer
);
7517 mpz_add_ui (s
, s
, 1);
7521 mpz_set (s
, tail
->u
.ar
.start
[i
]->value
.integer
);
7524 if (mpz_cmp (e1
->shape
[i
], s
) != 0)
7526 gfc_error ("Source-expr at %L and allocate-object at %L must "
7527 "have the same shape", &e1
->where
, &e2
->where
);
7540 /* Resolve the expression in an ALLOCATE statement, doing the additional
7541 checks to see whether the expression is OK or not. The expression must
7542 have a trailing array reference that gives the size of the array. */
7545 resolve_allocate_expr (gfc_expr
*e
, gfc_code
*code
, bool *array_alloc_wo_spec
)
7547 int i
, pointer
, allocatable
, dimension
, is_abstract
;
7551 symbol_attribute attr
;
7552 gfc_ref
*ref
, *ref2
;
7555 gfc_symbol
*sym
= NULL
;
7560 /* Mark the utmost array component as being in allocate to allow DIMEN_STAR
7561 checking of coarrays. */
7562 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
7563 if (ref
->next
== NULL
)
7566 if (ref
&& ref
->type
== REF_ARRAY
)
7567 ref
->u
.ar
.in_allocate
= true;
7569 if (!gfc_resolve_expr (e
))
7572 /* Make sure the expression is allocatable or a pointer. If it is
7573 pointer, the next-to-last reference must be a pointer. */
7577 sym
= e
->symtree
->n
.sym
;
7579 /* Check whether ultimate component is abstract and CLASS. */
7582 /* Is the allocate-object unlimited polymorphic? */
7583 unlimited
= UNLIMITED_POLY(e
);
7585 if (e
->expr_type
!= EXPR_VARIABLE
)
7588 attr
= gfc_expr_attr (e
);
7589 pointer
= attr
.pointer
;
7590 dimension
= attr
.dimension
;
7591 codimension
= attr
.codimension
;
7595 if (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
))
7597 allocatable
= CLASS_DATA (sym
)->attr
.allocatable
;
7598 pointer
= CLASS_DATA (sym
)->attr
.class_pointer
;
7599 dimension
= CLASS_DATA (sym
)->attr
.dimension
;
7600 codimension
= CLASS_DATA (sym
)->attr
.codimension
;
7601 is_abstract
= CLASS_DATA (sym
)->attr
.abstract
;
7605 allocatable
= sym
->attr
.allocatable
;
7606 pointer
= sym
->attr
.pointer
;
7607 dimension
= sym
->attr
.dimension
;
7608 codimension
= sym
->attr
.codimension
;
7613 for (ref
= e
->ref
; ref
; ref2
= ref
, ref
= ref
->next
)
7618 if (ref
->u
.ar
.codimen
> 0)
7621 for (n
= ref
->u
.ar
.dimen
;
7622 n
< ref
->u
.ar
.dimen
+ ref
->u
.ar
.codimen
; n
++)
7623 if (ref
->u
.ar
.dimen_type
[n
] != DIMEN_THIS_IMAGE
)
7630 if (ref
->next
!= NULL
)
7638 gfc_error ("Coindexed allocatable object at %L",
7643 c
= ref
->u
.c
.component
;
7644 if (c
->ts
.type
== BT_CLASS
)
7646 allocatable
= CLASS_DATA (c
)->attr
.allocatable
;
7647 pointer
= CLASS_DATA (c
)->attr
.class_pointer
;
7648 dimension
= CLASS_DATA (c
)->attr
.dimension
;
7649 codimension
= CLASS_DATA (c
)->attr
.codimension
;
7650 is_abstract
= CLASS_DATA (c
)->attr
.abstract
;
7654 allocatable
= c
->attr
.allocatable
;
7655 pointer
= c
->attr
.pointer
;
7656 dimension
= c
->attr
.dimension
;
7657 codimension
= c
->attr
.codimension
;
7658 is_abstract
= c
->attr
.abstract
;
7671 /* Check for F08:C628. */
7672 if (allocatable
== 0 && pointer
== 0 && !unlimited
)
7674 gfc_error ("Allocate-object at %L must be ALLOCATABLE or a POINTER",
7679 /* Some checks for the SOURCE tag. */
7682 /* Check F03:C631. */
7683 if (!gfc_type_compatible (&e
->ts
, &code
->expr3
->ts
))
7685 gfc_error ("Type of entity at %L is type incompatible with "
7686 "source-expr at %L", &e
->where
, &code
->expr3
->where
);
7690 /* Check F03:C632 and restriction following Note 6.18. */
7691 if (code
->expr3
->rank
> 0 && !conformable_arrays (code
->expr3
, e
))
7694 /* Check F03:C633. */
7695 if (code
->expr3
->ts
.kind
!= e
->ts
.kind
&& !unlimited
)
7697 gfc_error ("The allocate-object at %L and the source-expr at %L "
7698 "shall have the same kind type parameter",
7699 &e
->where
, &code
->expr3
->where
);
7703 /* Check F2008, C642. */
7704 if (code
->expr3
->ts
.type
== BT_DERIVED
7705 && ((codimension
&& gfc_expr_attr (code
->expr3
).lock_comp
)
7706 || (code
->expr3
->ts
.u
.derived
->from_intmod
7707 == INTMOD_ISO_FORTRAN_ENV
7708 && code
->expr3
->ts
.u
.derived
->intmod_sym_id
7709 == ISOFORTRAN_LOCK_TYPE
)))
7711 gfc_error ("The source-expr at %L shall neither be of type "
7712 "LOCK_TYPE nor have a LOCK_TYPE component if "
7713 "allocate-object at %L is a coarray",
7714 &code
->expr3
->where
, &e
->where
);
7718 /* Check TS18508, C702/C703. */
7719 if (code
->expr3
->ts
.type
== BT_DERIVED
7720 && ((codimension
&& gfc_expr_attr (code
->expr3
).event_comp
)
7721 || (code
->expr3
->ts
.u
.derived
->from_intmod
7722 == INTMOD_ISO_FORTRAN_ENV
7723 && code
->expr3
->ts
.u
.derived
->intmod_sym_id
7724 == ISOFORTRAN_EVENT_TYPE
)))
7726 gfc_error ("The source-expr at %L shall neither be of type "
7727 "EVENT_TYPE nor have a EVENT_TYPE component if "
7728 "allocate-object at %L is a coarray",
7729 &code
->expr3
->where
, &e
->where
);
7734 /* Check F08:C629. */
7735 if (is_abstract
&& code
->ext
.alloc
.ts
.type
== BT_UNKNOWN
7738 gcc_assert (e
->ts
.type
== BT_CLASS
);
7739 gfc_error ("Allocating %s of ABSTRACT base type at %L requires a "
7740 "type-spec or source-expr", sym
->name
, &e
->where
);
7744 /* Check F08:C632. */
7745 if (code
->ext
.alloc
.ts
.type
== BT_CHARACTER
&& !e
->ts
.deferred
7746 && !UNLIMITED_POLY (e
))
7750 if (!e
->ts
.u
.cl
->length
)
7753 cmp
= gfc_dep_compare_expr (e
->ts
.u
.cl
->length
,
7754 code
->ext
.alloc
.ts
.u
.cl
->length
);
7755 if (cmp
== 1 || cmp
== -1 || cmp
== -3)
7757 gfc_error ("Allocating %s at %L with type-spec requires the same "
7758 "character-length parameter as in the declaration",
7759 sym
->name
, &e
->where
);
7764 /* In the variable definition context checks, gfc_expr_attr is used
7765 on the expression. This is fooled by the array specification
7766 present in e, thus we have to eliminate that one temporarily. */
7767 e2
= remove_last_array_ref (e
);
7770 t
= gfc_check_vardef_context (e2
, true, true, false,
7771 _("ALLOCATE object"));
7773 t
= gfc_check_vardef_context (e2
, false, true, false,
7774 _("ALLOCATE object"));
7779 if (e
->ts
.type
== BT_CLASS
&& CLASS_DATA (e
)->attr
.dimension
7780 && !code
->expr3
&& code
->ext
.alloc
.ts
.type
== BT_DERIVED
)
7782 /* For class arrays, the initialization with SOURCE is done
7783 using _copy and trans_call. It is convenient to exploit that
7784 when the allocated type is different from the declared type but
7785 no SOURCE exists by setting expr3. */
7786 code
->expr3
= gfc_default_initializer (&code
->ext
.alloc
.ts
);
7788 else if (flag_coarray
!= GFC_FCOARRAY_LIB
&& e
->ts
.type
== BT_DERIVED
7789 && e
->ts
.u
.derived
->from_intmod
== INTMOD_ISO_FORTRAN_ENV
7790 && e
->ts
.u
.derived
->intmod_sym_id
== ISOFORTRAN_EVENT_TYPE
)
7792 /* We have to zero initialize the integer variable. */
7793 code
->expr3
= gfc_get_int_expr (gfc_default_integer_kind
, &e
->where
, 0);
7796 if (e
->ts
.type
== BT_CLASS
&& !unlimited
&& !UNLIMITED_POLY (code
->expr3
))
7798 /* Make sure the vtab symbol is present when
7799 the module variables are generated. */
7800 gfc_typespec ts
= e
->ts
;
7802 ts
= code
->expr3
->ts
;
7803 else if (code
->ext
.alloc
.ts
.type
== BT_DERIVED
)
7804 ts
= code
->ext
.alloc
.ts
;
7806 /* Finding the vtab also publishes the type's symbol. Therefore this
7807 statement is necessary. */
7808 gfc_find_derived_vtab (ts
.u
.derived
);
7810 else if (unlimited
&& !UNLIMITED_POLY (code
->expr3
))
7812 /* Again, make sure the vtab symbol is present when
7813 the module variables are generated. */
7814 gfc_typespec
*ts
= NULL
;
7816 ts
= &code
->expr3
->ts
;
7818 ts
= &code
->ext
.alloc
.ts
;
7822 /* Finding the vtab also publishes the type's symbol. Therefore this
7823 statement is necessary. */
7827 if (dimension
== 0 && codimension
== 0)
7830 /* Make sure the last reference node is an array specification. */
7832 if (!ref2
|| ref2
->type
!= REF_ARRAY
|| ref2
->u
.ar
.type
== AR_FULL
7833 || (dimension
&& ref2
->u
.ar
.dimen
== 0))
7838 if (!gfc_notify_std (GFC_STD_F2008
, "Array specification required "
7839 "in ALLOCATE statement at %L", &e
->where
))
7841 if (code
->expr3
->rank
!= 0)
7842 *array_alloc_wo_spec
= true;
7845 gfc_error ("Array specification or array-valued SOURCE= "
7846 "expression required in ALLOCATE statement at %L",
7853 gfc_error ("Array specification required in ALLOCATE statement "
7854 "at %L", &e
->where
);
7859 /* Make sure that the array section reference makes sense in the
7860 context of an ALLOCATE specification. */
7865 for (i
= ar
->dimen
; i
< ar
->dimen
+ ar
->codimen
; i
++)
7867 switch (ar
->dimen_type
[i
])
7869 case DIMEN_THIS_IMAGE
:
7870 gfc_error ("Coarray specification required in ALLOCATE statement "
7871 "at %L", &e
->where
);
7875 if (ar
->start
[i
] == 0 || ar
->end
[i
] == 0)
7877 /* If ar->stride[i] is NULL, we issued a previous error. */
7878 if (ar
->stride
[i
] == NULL
)
7879 gfc_error ("Bad array specification in ALLOCATE statement "
7880 "at %L", &e
->where
);
7883 else if (gfc_dep_compare_expr (ar
->start
[i
], ar
->end
[i
]) == 1)
7885 gfc_error ("Upper cobound is less than lower cobound at %L",
7886 &ar
->start
[i
]->where
);
7892 if (ar
->start
[i
]->expr_type
== EXPR_CONSTANT
)
7894 gcc_assert (ar
->start
[i
]->ts
.type
== BT_INTEGER
);
7895 if (mpz_cmp_si (ar
->start
[i
]->value
.integer
, 1) < 0)
7897 gfc_error ("Upper cobound is less than lower cobound "
7898 "of 1 at %L", &ar
->start
[i
]->where
);
7908 gfc_error ("Bad array specification in ALLOCATE statement at %L",
7914 for (i
= 0; i
< ar
->dimen
; i
++)
7916 if (ar
->type
== AR_ELEMENT
|| ar
->type
== AR_FULL
)
7919 switch (ar
->dimen_type
[i
])
7925 if (ar
->start
[i
] != NULL
7926 && ar
->end
[i
] != NULL
7927 && ar
->stride
[i
] == NULL
)
7935 case DIMEN_THIS_IMAGE
:
7936 gfc_error ("Bad array specification in ALLOCATE statement at %L",
7942 for (a
= code
->ext
.alloc
.list
; a
; a
= a
->next
)
7944 sym
= a
->expr
->symtree
->n
.sym
;
7946 /* TODO - check derived type components. */
7947 if (gfc_bt_struct (sym
->ts
.type
) || sym
->ts
.type
== BT_CLASS
)
7950 if ((ar
->start
[i
] != NULL
7951 && gfc_find_sym_in_expr (sym
, ar
->start
[i
]))
7952 || (ar
->end
[i
] != NULL
7953 && gfc_find_sym_in_expr (sym
, ar
->end
[i
])))
7955 gfc_error ("%qs must not appear in the array specification at "
7956 "%L in the same ALLOCATE statement where it is "
7957 "itself allocated", sym
->name
, &ar
->where
);
7963 for (i
= ar
->dimen
; i
< ar
->codimen
+ ar
->dimen
; i
++)
7965 if (ar
->dimen_type
[i
] == DIMEN_ELEMENT
7966 || ar
->dimen_type
[i
] == DIMEN_RANGE
)
7968 if (i
== (ar
->dimen
+ ar
->codimen
- 1))
7970 gfc_error ("Expected '*' in coindex specification in ALLOCATE "
7971 "statement at %L", &e
->where
);
7977 if (ar
->dimen_type
[i
] == DIMEN_STAR
&& i
== (ar
->dimen
+ ar
->codimen
- 1)
7978 && ar
->stride
[i
] == NULL
)
7981 gfc_error ("Bad coarray specification in ALLOCATE statement at %L",
7995 resolve_allocate_deallocate (gfc_code
*code
, const char *fcn
)
7997 gfc_expr
*stat
, *errmsg
, *pe
, *qe
;
7998 gfc_alloc
*a
, *p
, *q
;
8001 errmsg
= code
->expr2
;
8003 /* Check the stat variable. */
8006 gfc_check_vardef_context (stat
, false, false, false,
8007 _("STAT variable"));
8009 if ((stat
->ts
.type
!= BT_INTEGER
8010 && !(stat
->ref
&& (stat
->ref
->type
== REF_ARRAY
8011 || stat
->ref
->type
== REF_COMPONENT
)))
8013 gfc_error ("Stat-variable at %L must be a scalar INTEGER "
8014 "variable", &stat
->where
);
8016 for (p
= code
->ext
.alloc
.list
; p
; p
= p
->next
)
8017 if (p
->expr
->symtree
->n
.sym
->name
== stat
->symtree
->n
.sym
->name
)
8019 gfc_ref
*ref1
, *ref2
;
8022 for (ref1
= p
->expr
->ref
, ref2
= stat
->ref
; ref1
&& ref2
;
8023 ref1
= ref1
->next
, ref2
= ref2
->next
)
8025 if (ref1
->type
!= REF_COMPONENT
|| ref2
->type
!= REF_COMPONENT
)
8027 if (ref1
->u
.c
.component
->name
!= ref2
->u
.c
.component
->name
)
8036 gfc_error ("Stat-variable at %L shall not be %sd within "
8037 "the same %s statement", &stat
->where
, fcn
, fcn
);
8043 /* Check the errmsg variable. */
8047 gfc_warning (0, "ERRMSG at %L is useless without a STAT tag",
8050 gfc_check_vardef_context (errmsg
, false, false, false,
8051 _("ERRMSG variable"));
8053 /* F18:R928 alloc-opt is ERRMSG = errmsg-variable
8054 F18:R930 errmsg-variable is scalar-default-char-variable
8055 F18:R906 default-char-variable is variable
8056 F18:C906 default-char-variable shall be default character. */
8057 if ((errmsg
->ts
.type
!= BT_CHARACTER
8059 && (errmsg
->ref
->type
== REF_ARRAY
8060 || errmsg
->ref
->type
== REF_COMPONENT
)))
8062 || errmsg
->ts
.kind
!= gfc_default_character_kind
)
8063 gfc_error ("ERRMSG variable at %L shall be a scalar default CHARACTER "
8064 "variable", &errmsg
->where
);
8066 for (p
= code
->ext
.alloc
.list
; p
; p
= p
->next
)
8067 if (p
->expr
->symtree
->n
.sym
->name
== errmsg
->symtree
->n
.sym
->name
)
8069 gfc_ref
*ref1
, *ref2
;
8072 for (ref1
= p
->expr
->ref
, ref2
= errmsg
->ref
; ref1
&& ref2
;
8073 ref1
= ref1
->next
, ref2
= ref2
->next
)
8075 if (ref1
->type
!= REF_COMPONENT
|| ref2
->type
!= REF_COMPONENT
)
8077 if (ref1
->u
.c
.component
->name
!= ref2
->u
.c
.component
->name
)
8086 gfc_error ("Errmsg-variable at %L shall not be %sd within "
8087 "the same %s statement", &errmsg
->where
, fcn
, fcn
);
8093 /* Check that an allocate-object appears only once in the statement. */
8095 for (p
= code
->ext
.alloc
.list
; p
; p
= p
->next
)
8098 for (q
= p
->next
; q
; q
= q
->next
)
8101 if (pe
->symtree
->n
.sym
->name
== qe
->symtree
->n
.sym
->name
)
8103 /* This is a potential collision. */
8104 gfc_ref
*pr
= pe
->ref
;
8105 gfc_ref
*qr
= qe
->ref
;
8107 /* Follow the references until
8108 a) They start to differ, in which case there is no error;
8109 you can deallocate a%b and a%c in a single statement
8110 b) Both of them stop, which is an error
8111 c) One of them stops, which is also an error. */
8114 if (pr
== NULL
&& qr
== NULL
)
8116 gfc_error ("Allocate-object at %L also appears at %L",
8117 &pe
->where
, &qe
->where
);
8120 else if (pr
!= NULL
&& qr
== NULL
)
8122 gfc_error ("Allocate-object at %L is subobject of"
8123 " object at %L", &pe
->where
, &qe
->where
);
8126 else if (pr
== NULL
&& qr
!= NULL
)
8128 gfc_error ("Allocate-object at %L is subobject of"
8129 " object at %L", &qe
->where
, &pe
->where
);
8132 /* Here, pr != NULL && qr != NULL */
8133 gcc_assert(pr
->type
== qr
->type
);
8134 if (pr
->type
== REF_ARRAY
)
8136 /* Handle cases like allocate(v(3)%x(3), v(2)%x(3)),
8138 gcc_assert (qr
->type
== REF_ARRAY
);
8140 if (pr
->next
&& qr
->next
)
8143 gfc_array_ref
*par
= &(pr
->u
.ar
);
8144 gfc_array_ref
*qar
= &(qr
->u
.ar
);
8146 for (i
=0; i
<par
->dimen
; i
++)
8148 if ((par
->start
[i
] != NULL
8149 || qar
->start
[i
] != NULL
)
8150 && gfc_dep_compare_expr (par
->start
[i
],
8151 qar
->start
[i
]) != 0)
8158 if (pr
->u
.c
.component
->name
!= qr
->u
.c
.component
->name
)
8171 if (strcmp (fcn
, "ALLOCATE") == 0)
8173 bool arr_alloc_wo_spec
= false;
8175 /* Resolving the expr3 in the loop over all objects to allocate would
8176 execute loop invariant code for each loop item. Therefore do it just
8178 if (code
->expr3
&& code
->expr3
->mold
8179 && code
->expr3
->ts
.type
== BT_DERIVED
)
8181 /* Default initialization via MOLD (non-polymorphic). */
8182 gfc_expr
*rhs
= gfc_default_initializer (&code
->expr3
->ts
);
8185 gfc_resolve_expr (rhs
);
8186 gfc_free_expr (code
->expr3
);
8190 for (a
= code
->ext
.alloc
.list
; a
; a
= a
->next
)
8191 resolve_allocate_expr (a
->expr
, code
, &arr_alloc_wo_spec
);
8193 if (arr_alloc_wo_spec
&& code
->expr3
)
8195 /* Mark the allocate to have to take the array specification
8197 code
->ext
.alloc
.arr_spec_from_expr3
= 1;
8202 for (a
= code
->ext
.alloc
.list
; a
; a
= a
->next
)
8203 resolve_deallocate_expr (a
->expr
);
8208 /************ SELECT CASE resolution subroutines ************/
8210 /* Callback function for our mergesort variant. Determines interval
8211 overlaps for CASEs. Return <0 if op1 < op2, 0 for overlap, >0 for
8212 op1 > op2. Assumes we're not dealing with the default case.
8213 We have op1 = (:L), (K:L) or (K:) and op2 = (:N), (M:N) or (M:).
8214 There are nine situations to check. */
8217 compare_cases (const gfc_case
*op1
, const gfc_case
*op2
)
8221 if (op1
->low
== NULL
) /* op1 = (:L) */
8223 /* op2 = (:N), so overlap. */
8225 /* op2 = (M:) or (M:N), L < M */
8226 if (op2
->low
!= NULL
8227 && gfc_compare_expr (op1
->high
, op2
->low
, INTRINSIC_LT
) < 0)
8230 else if (op1
->high
== NULL
) /* op1 = (K:) */
8232 /* op2 = (M:), so overlap. */
8234 /* op2 = (:N) or (M:N), K > N */
8235 if (op2
->high
!= NULL
8236 && gfc_compare_expr (op1
->low
, op2
->high
, INTRINSIC_GT
) > 0)
8239 else /* op1 = (K:L) */
8241 if (op2
->low
== NULL
) /* op2 = (:N), K > N */
8242 retval
= (gfc_compare_expr (op1
->low
, op2
->high
, INTRINSIC_GT
) > 0)
8244 else if (op2
->high
== NULL
) /* op2 = (M:), L < M */
8245 retval
= (gfc_compare_expr (op1
->high
, op2
->low
, INTRINSIC_LT
) < 0)
8247 else /* op2 = (M:N) */
8251 if (gfc_compare_expr (op1
->high
, op2
->low
, INTRINSIC_LT
) < 0)
8254 else if (gfc_compare_expr (op1
->low
, op2
->high
, INTRINSIC_GT
) > 0)
8263 /* Merge-sort a double linked case list, detecting overlap in the
8264 process. LIST is the head of the double linked case list before it
8265 is sorted. Returns the head of the sorted list if we don't see any
8266 overlap, or NULL otherwise. */
8269 check_case_overlap (gfc_case
*list
)
8271 gfc_case
*p
, *q
, *e
, *tail
;
8272 int insize
, nmerges
, psize
, qsize
, cmp
, overlap_seen
;
8274 /* If the passed list was empty, return immediately. */
8281 /* Loop unconditionally. The only exit from this loop is a return
8282 statement, when we've finished sorting the case list. */
8289 /* Count the number of merges we do in this pass. */
8292 /* Loop while there exists a merge to be done. */
8297 /* Count this merge. */
8300 /* Cut the list in two pieces by stepping INSIZE places
8301 forward in the list, starting from P. */
8304 for (i
= 0; i
< insize
; i
++)
8313 /* Now we have two lists. Merge them! */
8314 while (psize
> 0 || (qsize
> 0 && q
!= NULL
))
8316 /* See from which the next case to merge comes from. */
8319 /* P is empty so the next case must come from Q. */
8324 else if (qsize
== 0 || q
== NULL
)
8333 cmp
= compare_cases (p
, q
);
8336 /* The whole case range for P is less than the
8344 /* The whole case range for Q is greater than
8345 the case range for P. */
8352 /* The cases overlap, or they are the same
8353 element in the list. Either way, we must
8354 issue an error and get the next case from P. */
8355 /* FIXME: Sort P and Q by line number. */
8356 gfc_error ("CASE label at %L overlaps with CASE "
8357 "label at %L", &p
->where
, &q
->where
);
8365 /* Add the next element to the merged list. */
8374 /* P has now stepped INSIZE places along, and so has Q. So
8375 they're the same. */
8380 /* If we have done only one merge or none at all, we've
8381 finished sorting the cases. */
8390 /* Otherwise repeat, merging lists twice the size. */
8396 /* Check to see if an expression is suitable for use in a CASE statement.
8397 Makes sure that all case expressions are scalar constants of the same
8398 type. Return false if anything is wrong. */
8401 validate_case_label_expr (gfc_expr
*e
, gfc_expr
*case_expr
)
8403 if (e
== NULL
) return true;
8405 if (e
->ts
.type
!= case_expr
->ts
.type
)
8407 gfc_error ("Expression in CASE statement at %L must be of type %s",
8408 &e
->where
, gfc_basic_typename (case_expr
->ts
.type
));
8412 /* C805 (R808) For a given case-construct, each case-value shall be of
8413 the same type as case-expr. For character type, length differences
8414 are allowed, but the kind type parameters shall be the same. */
8416 if (case_expr
->ts
.type
== BT_CHARACTER
&& e
->ts
.kind
!= case_expr
->ts
.kind
)
8418 gfc_error ("Expression in CASE statement at %L must be of kind %d",
8419 &e
->where
, case_expr
->ts
.kind
);
8423 /* Convert the case value kind to that of case expression kind,
8426 if (e
->ts
.kind
!= case_expr
->ts
.kind
)
8427 gfc_convert_type_warn (e
, &case_expr
->ts
, 2, 0);
8431 gfc_error ("Expression in CASE statement at %L must be scalar",
8440 /* Given a completely parsed select statement, we:
8442 - Validate all expressions and code within the SELECT.
8443 - Make sure that the selection expression is not of the wrong type.
8444 - Make sure that no case ranges overlap.
8445 - Eliminate unreachable cases and unreachable code resulting from
8446 removing case labels.
8448 The standard does allow unreachable cases, e.g. CASE (5:3). But
8449 they are a hassle for code generation, and to prevent that, we just
8450 cut them out here. This is not necessary for overlapping cases
8451 because they are illegal and we never even try to generate code.
8453 We have the additional caveat that a SELECT construct could have
8454 been a computed GOTO in the source code. Fortunately we can fairly
8455 easily work around that here: The case_expr for a "real" SELECT CASE
8456 is in code->expr1, but for a computed GOTO it is in code->expr2. All
8457 we have to do is make sure that the case_expr is a scalar integer
8461 resolve_select (gfc_code
*code
, bool select_type
)
8464 gfc_expr
*case_expr
;
8465 gfc_case
*cp
, *default_case
, *tail
, *head
;
8466 int seen_unreachable
;
8472 if (code
->expr1
== NULL
)
8474 /* This was actually a computed GOTO statement. */
8475 case_expr
= code
->expr2
;
8476 if (case_expr
->ts
.type
!= BT_INTEGER
|| case_expr
->rank
!= 0)
8477 gfc_error ("Selection expression in computed GOTO statement "
8478 "at %L must be a scalar integer expression",
8481 /* Further checking is not necessary because this SELECT was built
8482 by the compiler, so it should always be OK. Just move the
8483 case_expr from expr2 to expr so that we can handle computed
8484 GOTOs as normal SELECTs from here on. */
8485 code
->expr1
= code
->expr2
;
8490 case_expr
= code
->expr1
;
8491 type
= case_expr
->ts
.type
;
8494 if (type
!= BT_LOGICAL
&& type
!= BT_INTEGER
&& type
!= BT_CHARACTER
)
8496 gfc_error ("Argument of SELECT statement at %L cannot be %s",
8497 &case_expr
->where
, gfc_typename (&case_expr
->ts
));
8499 /* Punt. Going on here just produce more garbage error messages. */
8504 if (!select_type
&& case_expr
->rank
!= 0)
8506 gfc_error ("Argument of SELECT statement at %L must be a scalar "
8507 "expression", &case_expr
->where
);
8513 /* Raise a warning if an INTEGER case value exceeds the range of
8514 the case-expr. Later, all expressions will be promoted to the
8515 largest kind of all case-labels. */
8517 if (type
== BT_INTEGER
)
8518 for (body
= code
->block
; body
; body
= body
->block
)
8519 for (cp
= body
->ext
.block
.case_list
; cp
; cp
= cp
->next
)
8522 && gfc_check_integer_range (cp
->low
->value
.integer
,
8523 case_expr
->ts
.kind
) != ARITH_OK
)
8524 gfc_warning (0, "Expression in CASE statement at %L is "
8525 "not in the range of %s", &cp
->low
->where
,
8526 gfc_typename (&case_expr
->ts
));
8529 && cp
->low
!= cp
->high
8530 && gfc_check_integer_range (cp
->high
->value
.integer
,
8531 case_expr
->ts
.kind
) != ARITH_OK
)
8532 gfc_warning (0, "Expression in CASE statement at %L is "
8533 "not in the range of %s", &cp
->high
->where
,
8534 gfc_typename (&case_expr
->ts
));
8537 /* PR 19168 has a long discussion concerning a mismatch of the kinds
8538 of the SELECT CASE expression and its CASE values. Walk the lists
8539 of case values, and if we find a mismatch, promote case_expr to
8540 the appropriate kind. */
8542 if (type
== BT_LOGICAL
|| type
== BT_INTEGER
)
8544 for (body
= code
->block
; body
; body
= body
->block
)
8546 /* Walk the case label list. */
8547 for (cp
= body
->ext
.block
.case_list
; cp
; cp
= cp
->next
)
8549 /* Intercept the DEFAULT case. It does not have a kind. */
8550 if (cp
->low
== NULL
&& cp
->high
== NULL
)
8553 /* Unreachable case ranges are discarded, so ignore. */
8554 if (cp
->low
!= NULL
&& cp
->high
!= NULL
8555 && cp
->low
!= cp
->high
8556 && gfc_compare_expr (cp
->low
, cp
->high
, INTRINSIC_GT
) > 0)
8560 && case_expr
->ts
.kind
!= gfc_kind_max(case_expr
, cp
->low
))
8561 gfc_convert_type_warn (case_expr
, &cp
->low
->ts
, 2, 0);
8563 if (cp
->high
!= NULL
8564 && case_expr
->ts
.kind
!= gfc_kind_max(case_expr
, cp
->high
))
8565 gfc_convert_type_warn (case_expr
, &cp
->high
->ts
, 2, 0);
8570 /* Assume there is no DEFAULT case. */
8571 default_case
= NULL
;
8576 for (body
= code
->block
; body
; body
= body
->block
)
8578 /* Assume the CASE list is OK, and all CASE labels can be matched. */
8580 seen_unreachable
= 0;
8582 /* Walk the case label list, making sure that all case labels
8584 for (cp
= body
->ext
.block
.case_list
; cp
; cp
= cp
->next
)
8586 /* Count the number of cases in the whole construct. */
8589 /* Intercept the DEFAULT case. */
8590 if (cp
->low
== NULL
&& cp
->high
== NULL
)
8592 if (default_case
!= NULL
)
8594 gfc_error ("The DEFAULT CASE at %L cannot be followed "
8595 "by a second DEFAULT CASE at %L",
8596 &default_case
->where
, &cp
->where
);
8607 /* Deal with single value cases and case ranges. Errors are
8608 issued from the validation function. */
8609 if (!validate_case_label_expr (cp
->low
, case_expr
)
8610 || !validate_case_label_expr (cp
->high
, case_expr
))
8616 if (type
== BT_LOGICAL
8617 && ((cp
->low
== NULL
|| cp
->high
== NULL
)
8618 || cp
->low
!= cp
->high
))
8620 gfc_error ("Logical range in CASE statement at %L is not "
8621 "allowed", &cp
->low
->where
);
8626 if (type
== BT_LOGICAL
&& cp
->low
->expr_type
== EXPR_CONSTANT
)
8629 value
= cp
->low
->value
.logical
== 0 ? 2 : 1;
8630 if (value
& seen_logical
)
8632 gfc_error ("Constant logical value in CASE statement "
8633 "is repeated at %L",
8638 seen_logical
|= value
;
8641 if (cp
->low
!= NULL
&& cp
->high
!= NULL
8642 && cp
->low
!= cp
->high
8643 && gfc_compare_expr (cp
->low
, cp
->high
, INTRINSIC_GT
) > 0)
8645 if (warn_surprising
)
8646 gfc_warning (OPT_Wsurprising
,
8647 "Range specification at %L can never be matched",
8650 cp
->unreachable
= 1;
8651 seen_unreachable
= 1;
8655 /* If the case range can be matched, it can also overlap with
8656 other cases. To make sure it does not, we put it in a
8657 double linked list here. We sort that with a merge sort
8658 later on to detect any overlapping cases. */
8662 head
->right
= head
->left
= NULL
;
8667 tail
->right
->left
= tail
;
8674 /* It there was a failure in the previous case label, give up
8675 for this case label list. Continue with the next block. */
8679 /* See if any case labels that are unreachable have been seen.
8680 If so, we eliminate them. This is a bit of a kludge because
8681 the case lists for a single case statement (label) is a
8682 single forward linked lists. */
8683 if (seen_unreachable
)
8685 /* Advance until the first case in the list is reachable. */
8686 while (body
->ext
.block
.case_list
!= NULL
8687 && body
->ext
.block
.case_list
->unreachable
)
8689 gfc_case
*n
= body
->ext
.block
.case_list
;
8690 body
->ext
.block
.case_list
= body
->ext
.block
.case_list
->next
;
8692 gfc_free_case_list (n
);
8695 /* Strip all other unreachable cases. */
8696 if (body
->ext
.block
.case_list
)
8698 for (cp
= body
->ext
.block
.case_list
; cp
&& cp
->next
; cp
= cp
->next
)
8700 if (cp
->next
->unreachable
)
8702 gfc_case
*n
= cp
->next
;
8703 cp
->next
= cp
->next
->next
;
8705 gfc_free_case_list (n
);
8712 /* See if there were overlapping cases. If the check returns NULL,
8713 there was overlap. In that case we don't do anything. If head
8714 is non-NULL, we prepend the DEFAULT case. The sorted list can
8715 then used during code generation for SELECT CASE constructs with
8716 a case expression of a CHARACTER type. */
8719 head
= check_case_overlap (head
);
8721 /* Prepend the default_case if it is there. */
8722 if (head
!= NULL
&& default_case
)
8724 default_case
->left
= NULL
;
8725 default_case
->right
= head
;
8726 head
->left
= default_case
;
8730 /* Eliminate dead blocks that may be the result if we've seen
8731 unreachable case labels for a block. */
8732 for (body
= code
; body
&& body
->block
; body
= body
->block
)
8734 if (body
->block
->ext
.block
.case_list
== NULL
)
8736 /* Cut the unreachable block from the code chain. */
8737 gfc_code
*c
= body
->block
;
8738 body
->block
= c
->block
;
8740 /* Kill the dead block, but not the blocks below it. */
8742 gfc_free_statements (c
);
8746 /* More than two cases is legal but insane for logical selects.
8747 Issue a warning for it. */
8748 if (warn_surprising
&& type
== BT_LOGICAL
&& ncases
> 2)
8749 gfc_warning (OPT_Wsurprising
,
8750 "Logical SELECT CASE block at %L has more that two cases",
8755 /* Check if a derived type is extensible. */
8758 gfc_type_is_extensible (gfc_symbol
*sym
)
8760 return !(sym
->attr
.is_bind_c
|| sym
->attr
.sequence
8761 || (sym
->attr
.is_class
8762 && sym
->components
->ts
.u
.derived
->attr
.unlimited_polymorphic
));
8767 resolve_types (gfc_namespace
*ns
);
8769 /* Resolve an associate-name: Resolve target and ensure the type-spec is
8770 correct as well as possibly the array-spec. */
8773 resolve_assoc_var (gfc_symbol
* sym
, bool resolve_target
)
8777 gcc_assert (sym
->assoc
);
8778 gcc_assert (sym
->attr
.flavor
== FL_VARIABLE
);
8780 /* If this is for SELECT TYPE, the target may not yet be set. In that
8781 case, return. Resolution will be called later manually again when
8783 target
= sym
->assoc
->target
;
8786 gcc_assert (!sym
->assoc
->dangling
);
8788 if (resolve_target
&& !gfc_resolve_expr (target
))
8791 /* For variable targets, we get some attributes from the target. */
8792 if (target
->expr_type
== EXPR_VARIABLE
)
8796 gcc_assert (target
->symtree
);
8797 tsym
= target
->symtree
->n
.sym
;
8799 sym
->attr
.asynchronous
= tsym
->attr
.asynchronous
;
8800 sym
->attr
.volatile_
= tsym
->attr
.volatile_
;
8802 sym
->attr
.target
= tsym
->attr
.target
8803 || gfc_expr_attr (target
).pointer
;
8804 if (is_subref_array (target
))
8805 sym
->attr
.subref_array_pointer
= 1;
8808 if (target
->expr_type
== EXPR_NULL
)
8810 gfc_error ("Selector at %L cannot be NULL()", &target
->where
);
8813 else if (target
->ts
.type
== BT_UNKNOWN
)
8815 gfc_error ("Selector at %L has no type", &target
->where
);
8819 /* Get type if this was not already set. Note that it can be
8820 some other type than the target in case this is a SELECT TYPE
8821 selector! So we must not update when the type is already there. */
8822 if (sym
->ts
.type
== BT_UNKNOWN
)
8823 sym
->ts
= target
->ts
;
8825 gcc_assert (sym
->ts
.type
!= BT_UNKNOWN
);
8827 /* See if this is a valid association-to-variable. */
8828 sym
->assoc
->variable
= (target
->expr_type
== EXPR_VARIABLE
8829 && !gfc_has_vector_subscript (target
));
8831 /* Finally resolve if this is an array or not. */
8832 if (sym
->attr
.dimension
&& target
->rank
== 0)
8834 /* primary.c makes the assumption that a reference to an associate
8835 name followed by a left parenthesis is an array reference. */
8836 if (sym
->ts
.type
!= BT_CHARACTER
)
8837 gfc_error ("Associate-name %qs at %L is used as array",
8838 sym
->name
, &sym
->declared_at
);
8839 sym
->attr
.dimension
= 0;
8844 /* We cannot deal with class selectors that need temporaries. */
8845 if (target
->ts
.type
== BT_CLASS
8846 && gfc_ref_needs_temporary_p (target
->ref
))
8848 gfc_error ("CLASS selector at %L needs a temporary which is not "
8849 "yet implemented", &target
->where
);
8853 if (target
->ts
.type
== BT_CLASS
)
8854 gfc_fix_class_refs (target
);
8856 if (target
->rank
!= 0 && !sym
->attr
.select_rank_temporary
)
8859 /* The rank may be incorrectly guessed at parsing, therefore make sure
8860 it is corrected now. */
8861 if (sym
->ts
.type
!= BT_CLASS
&& (!sym
->as
|| sym
->assoc
->rankguessed
))
8864 sym
->as
= gfc_get_array_spec ();
8866 as
->rank
= target
->rank
;
8867 as
->type
= AS_DEFERRED
;
8868 as
->corank
= gfc_get_corank (target
);
8869 sym
->attr
.dimension
= 1;
8870 if (as
->corank
!= 0)
8871 sym
->attr
.codimension
= 1;
8873 else if (sym
->ts
.type
== BT_CLASS
&& (!CLASS_DATA (sym
)->as
|| sym
->assoc
->rankguessed
))
8875 if (!CLASS_DATA (sym
)->as
)
8876 CLASS_DATA (sym
)->as
= gfc_get_array_spec ();
8877 as
= CLASS_DATA (sym
)->as
;
8878 as
->rank
= target
->rank
;
8879 as
->type
= AS_DEFERRED
;
8880 as
->corank
= gfc_get_corank (target
);
8881 CLASS_DATA (sym
)->attr
.dimension
= 1;
8882 if (as
->corank
!= 0)
8883 CLASS_DATA (sym
)->attr
.codimension
= 1;
8886 else if (!sym
->attr
.select_rank_temporary
)
8888 /* target's rank is 0, but the type of the sym is still array valued,
8889 which has to be corrected. */
8890 if (sym
->ts
.type
== BT_CLASS
8891 && CLASS_DATA (sym
) && CLASS_DATA (sym
)->as
)
8894 symbol_attribute attr
;
8895 /* The associated variable's type is still the array type
8896 correct this now. */
8897 gfc_typespec
*ts
= &target
->ts
;
8900 for (ref
= target
->ref
; ref
!= NULL
; ref
= ref
->next
)
8905 ts
= &ref
->u
.c
.component
->ts
;
8908 if (ts
->type
== BT_CLASS
)
8909 ts
= &ts
->u
.derived
->components
->ts
;
8915 /* Create a scalar instance of the current class type. Because the
8916 rank of a class array goes into its name, the type has to be
8917 rebuild. The alternative of (re-)setting just the attributes
8918 and as in the current type, destroys the type also in other
8922 sym
->ts
.type
= BT_CLASS
;
8923 attr
= CLASS_DATA (sym
)->attr
;
8925 attr
.associate_var
= 1;
8926 attr
.dimension
= attr
.codimension
= 0;
8927 attr
.class_pointer
= 1;
8928 if (!gfc_build_class_symbol (&sym
->ts
, &attr
, &as
))
8930 /* Make sure the _vptr is set. */
8931 c
= gfc_find_component (sym
->ts
.u
.derived
, "_vptr", true, true, NULL
);
8932 if (c
->ts
.u
.derived
== NULL
)
8933 c
->ts
.u
.derived
= gfc_find_derived_vtab (sym
->ts
.u
.derived
);
8934 CLASS_DATA (sym
)->attr
.pointer
= 1;
8935 CLASS_DATA (sym
)->attr
.class_pointer
= 1;
8936 gfc_set_sym_referenced (sym
->ts
.u
.derived
);
8937 gfc_commit_symbol (sym
->ts
.u
.derived
);
8938 /* _vptr now has the _vtab in it, change it to the _vtype. */
8939 if (c
->ts
.u
.derived
->attr
.vtab
)
8940 c
->ts
.u
.derived
= c
->ts
.u
.derived
->ts
.u
.derived
;
8941 c
->ts
.u
.derived
->ns
->types_resolved
= 0;
8942 resolve_types (c
->ts
.u
.derived
->ns
);
8946 /* Mark this as an associate variable. */
8947 sym
->attr
.associate_var
= 1;
8949 /* Fix up the type-spec for CHARACTER types. */
8950 if (sym
->ts
.type
== BT_CHARACTER
&& !sym
->attr
.select_type_temporary
)
8953 sym
->ts
.u
.cl
= target
->ts
.u
.cl
;
8955 if (sym
->ts
.deferred
&& target
->expr_type
== EXPR_VARIABLE
8956 && target
->symtree
->n
.sym
->attr
.dummy
8957 && sym
->ts
.u
.cl
== target
->ts
.u
.cl
)
8959 sym
->ts
.u
.cl
= gfc_new_charlen (sym
->ns
, NULL
);
8960 sym
->ts
.deferred
= 1;
8963 if (!sym
->ts
.u
.cl
->length
8964 && !sym
->ts
.deferred
8965 && target
->expr_type
== EXPR_CONSTANT
)
8967 sym
->ts
.u
.cl
->length
=
8968 gfc_get_int_expr (gfc_charlen_int_kind
, NULL
,
8969 target
->value
.character
.length
);
8971 else if ((!sym
->ts
.u
.cl
->length
8972 || sym
->ts
.u
.cl
->length
->expr_type
!= EXPR_CONSTANT
)
8973 && target
->expr_type
!= EXPR_VARIABLE
)
8975 sym
->ts
.u
.cl
= gfc_new_charlen (sym
->ns
, NULL
);
8976 sym
->ts
.deferred
= 1;
8978 /* This is reset in trans-stmt.c after the assignment
8979 of the target expression to the associate name. */
8980 sym
->attr
.allocatable
= 1;
8984 /* If the target is a good class object, so is the associate variable. */
8985 if (sym
->ts
.type
== BT_CLASS
&& gfc_expr_attr (target
).class_ok
)
8986 sym
->attr
.class_ok
= 1;
8990 /* Ensure that SELECT TYPE expressions have the correct rank and a full
8991 array reference, where necessary. The symbols are artificial and so
8992 the dimension attribute and arrayspec can also be set. In addition,
8993 sometimes the expr1 arrives as BT_DERIVED, when the symbol is BT_CLASS.
8994 This is corrected here as well.*/
8997 fixup_array_ref (gfc_expr
**expr1
, gfc_expr
*expr2
,
8998 int rank
, gfc_ref
*ref
)
9000 gfc_ref
*nref
= (*expr1
)->ref
;
9001 gfc_symbol
*sym1
= (*expr1
)->symtree
->n
.sym
;
9002 gfc_symbol
*sym2
= expr2
? expr2
->symtree
->n
.sym
: NULL
;
9003 (*expr1
)->rank
= rank
;
9004 if (sym1
->ts
.type
== BT_CLASS
)
9006 if ((*expr1
)->ts
.type
!= BT_CLASS
)
9007 (*expr1
)->ts
= sym1
->ts
;
9009 CLASS_DATA (sym1
)->attr
.dimension
= 1;
9010 if (CLASS_DATA (sym1
)->as
== NULL
&& sym2
)
9011 CLASS_DATA (sym1
)->as
9012 = gfc_copy_array_spec (CLASS_DATA (sym2
)->as
);
9016 sym1
->attr
.dimension
= 1;
9017 if (sym1
->as
== NULL
&& sym2
)
9018 sym1
->as
= gfc_copy_array_spec (sym2
->as
);
9021 for (; nref
; nref
= nref
->next
)
9022 if (nref
->next
== NULL
)
9025 if (ref
&& nref
&& nref
->type
!= REF_ARRAY
)
9026 nref
->next
= gfc_copy_ref (ref
);
9027 else if (ref
&& !nref
)
9028 (*expr1
)->ref
= gfc_copy_ref (ref
);
9033 build_loc_call (gfc_expr
*sym_expr
)
9036 loc_call
= gfc_get_expr ();
9037 loc_call
->expr_type
= EXPR_FUNCTION
;
9038 gfc_get_sym_tree ("_loc", gfc_current_ns
, &loc_call
->symtree
, false);
9039 loc_call
->symtree
->n
.sym
->attr
.flavor
= FL_PROCEDURE
;
9040 loc_call
->symtree
->n
.sym
->attr
.intrinsic
= 1;
9041 loc_call
->symtree
->n
.sym
->result
= loc_call
->symtree
->n
.sym
;
9042 gfc_commit_symbol (loc_call
->symtree
->n
.sym
);
9043 loc_call
->ts
.type
= BT_INTEGER
;
9044 loc_call
->ts
.kind
= gfc_index_integer_kind
;
9045 loc_call
->value
.function
.isym
= gfc_intrinsic_function_by_id (GFC_ISYM_LOC
);
9046 loc_call
->value
.function
.actual
= gfc_get_actual_arglist ();
9047 loc_call
->value
.function
.actual
->expr
= sym_expr
;
9048 loc_call
->where
= sym_expr
->where
;
9052 /* Resolve a SELECT TYPE statement. */
9055 resolve_select_type (gfc_code
*code
, gfc_namespace
*old_ns
)
9057 gfc_symbol
*selector_type
;
9058 gfc_code
*body
, *new_st
, *if_st
, *tail
;
9059 gfc_code
*class_is
= NULL
, *default_case
= NULL
;
9062 char name
[GFC_MAX_SYMBOL_LEN
];
9066 gfc_ref
* ref
= NULL
;
9067 gfc_expr
*selector_expr
= NULL
;
9069 ns
= code
->ext
.block
.ns
;
9072 /* Check for F03:C813. */
9073 if (code
->expr1
->ts
.type
!= BT_CLASS
9074 && !(code
->expr2
&& code
->expr2
->ts
.type
== BT_CLASS
))
9076 gfc_error ("Selector shall be polymorphic in SELECT TYPE statement "
9077 "at %L", &code
->loc
);
9081 if (!code
->expr1
->symtree
->n
.sym
->attr
.class_ok
)
9086 gfc_ref
*ref2
= NULL
;
9087 for (ref
= code
->expr2
->ref
; ref
!= NULL
; ref
= ref
->next
)
9088 if (ref
->type
== REF_COMPONENT
9089 && ref
->u
.c
.component
->ts
.type
== BT_CLASS
)
9094 if (code
->expr1
->symtree
->n
.sym
->attr
.untyped
)
9095 code
->expr1
->symtree
->n
.sym
->ts
= ref2
->u
.c
.component
->ts
;
9096 selector_type
= CLASS_DATA (ref2
->u
.c
.component
)->ts
.u
.derived
;
9100 if (code
->expr1
->symtree
->n
.sym
->attr
.untyped
)
9101 code
->expr1
->symtree
->n
.sym
->ts
= code
->expr2
->ts
;
9102 selector_type
= CLASS_DATA (code
->expr2
)->ts
.u
.derived
;
9105 if (code
->expr2
->rank
&& CLASS_DATA (code
->expr1
)->as
)
9106 CLASS_DATA (code
->expr1
)->as
->rank
= code
->expr2
->rank
;
9108 /* F2008: C803 The selector expression must not be coindexed. */
9109 if (gfc_is_coindexed (code
->expr2
))
9111 gfc_error ("Selector at %L must not be coindexed",
9112 &code
->expr2
->where
);
9119 selector_type
= CLASS_DATA (code
->expr1
)->ts
.u
.derived
;
9121 if (gfc_is_coindexed (code
->expr1
))
9123 gfc_error ("Selector at %L must not be coindexed",
9124 &code
->expr1
->where
);
9129 /* Loop over TYPE IS / CLASS IS cases. */
9130 for (body
= code
->block
; body
; body
= body
->block
)
9132 c
= body
->ext
.block
.case_list
;
9136 /* Check for repeated cases. */
9137 for (tail
= code
->block
; tail
; tail
= tail
->block
)
9139 gfc_case
*d
= tail
->ext
.block
.case_list
;
9143 if (c
->ts
.type
== d
->ts
.type
9144 && ((c
->ts
.type
== BT_DERIVED
9145 && c
->ts
.u
.derived
&& d
->ts
.u
.derived
9146 && !strcmp (c
->ts
.u
.derived
->name
,
9147 d
->ts
.u
.derived
->name
))
9148 || c
->ts
.type
== BT_UNKNOWN
9149 || (!(c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
9150 && c
->ts
.kind
== d
->ts
.kind
)))
9152 gfc_error ("TYPE IS at %L overlaps with TYPE IS at %L",
9153 &c
->where
, &d
->where
);
9159 /* Check F03:C815. */
9160 if ((c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
9161 && !selector_type
->attr
.unlimited_polymorphic
9162 && !gfc_type_is_extensible (c
->ts
.u
.derived
))
9164 gfc_error ("Derived type %qs at %L must be extensible",
9165 c
->ts
.u
.derived
->name
, &c
->where
);
9170 /* Check F03:C816. */
9171 if (c
->ts
.type
!= BT_UNKNOWN
&& !selector_type
->attr
.unlimited_polymorphic
9172 && ((c
->ts
.type
!= BT_DERIVED
&& c
->ts
.type
!= BT_CLASS
)
9173 || !gfc_type_is_extension_of (selector_type
, c
->ts
.u
.derived
)))
9175 if (c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
9176 gfc_error ("Derived type %qs at %L must be an extension of %qs",
9177 c
->ts
.u
.derived
->name
, &c
->where
, selector_type
->name
);
9179 gfc_error ("Unexpected intrinsic type %qs at %L",
9180 gfc_basic_typename (c
->ts
.type
), &c
->where
);
9185 /* Check F03:C814. */
9186 if (c
->ts
.type
== BT_CHARACTER
9187 && (c
->ts
.u
.cl
->length
!= NULL
|| c
->ts
.deferred
))
9189 gfc_error ("The type-spec at %L shall specify that each length "
9190 "type parameter is assumed", &c
->where
);
9195 /* Intercept the DEFAULT case. */
9196 if (c
->ts
.type
== BT_UNKNOWN
)
9198 /* Check F03:C818. */
9201 gfc_error ("The DEFAULT CASE at %L cannot be followed "
9202 "by a second DEFAULT CASE at %L",
9203 &default_case
->ext
.block
.case_list
->where
, &c
->where
);
9208 default_case
= body
;
9215 /* Transform SELECT TYPE statement to BLOCK and associate selector to
9216 target if present. If there are any EXIT statements referring to the
9217 SELECT TYPE construct, this is no problem because the gfc_code
9218 reference stays the same and EXIT is equally possible from the BLOCK
9219 it is changed to. */
9220 code
->op
= EXEC_BLOCK
;
9223 gfc_association_list
* assoc
;
9225 assoc
= gfc_get_association_list ();
9226 assoc
->st
= code
->expr1
->symtree
;
9227 assoc
->target
= gfc_copy_expr (code
->expr2
);
9228 assoc
->target
->where
= code
->expr2
->where
;
9229 /* assoc->variable will be set by resolve_assoc_var. */
9231 code
->ext
.block
.assoc
= assoc
;
9232 code
->expr1
->symtree
->n
.sym
->assoc
= assoc
;
9234 resolve_assoc_var (code
->expr1
->symtree
->n
.sym
, false);
9237 code
->ext
.block
.assoc
= NULL
;
9239 /* Ensure that the selector rank and arrayspec are available to
9240 correct expressions in which they might be missing. */
9241 if (code
->expr2
&& code
->expr2
->rank
)
9243 rank
= code
->expr2
->rank
;
9244 for (ref
= code
->expr2
->ref
; ref
; ref
= ref
->next
)
9245 if (ref
->next
== NULL
)
9247 if (ref
&& ref
->type
== REF_ARRAY
)
9248 ref
= gfc_copy_ref (ref
);
9250 /* Fixup expr1 if necessary. */
9252 fixup_array_ref (&code
->expr1
, code
->expr2
, rank
, ref
);
9254 else if (code
->expr1
->rank
)
9256 rank
= code
->expr1
->rank
;
9257 for (ref
= code
->expr1
->ref
; ref
; ref
= ref
->next
)
9258 if (ref
->next
== NULL
)
9260 if (ref
&& ref
->type
== REF_ARRAY
)
9261 ref
= gfc_copy_ref (ref
);
9264 /* Add EXEC_SELECT to switch on type. */
9265 new_st
= gfc_get_code (code
->op
);
9266 new_st
->expr1
= code
->expr1
;
9267 new_st
->expr2
= code
->expr2
;
9268 new_st
->block
= code
->block
;
9269 code
->expr1
= code
->expr2
= NULL
;
9274 ns
->code
->next
= new_st
;
9276 code
->op
= EXEC_SELECT_TYPE
;
9278 /* Use the intrinsic LOC function to generate an integer expression
9279 for the vtable of the selector. Note that the rank of the selector
9280 expression has to be set to zero. */
9281 gfc_add_vptr_component (code
->expr1
);
9282 code
->expr1
->rank
= 0;
9283 code
->expr1
= build_loc_call (code
->expr1
);
9284 selector_expr
= code
->expr1
->value
.function
.actual
->expr
;
9286 /* Loop over TYPE IS / CLASS IS cases. */
9287 for (body
= code
->block
; body
; body
= body
->block
)
9291 c
= body
->ext
.block
.case_list
;
9293 /* Generate an index integer expression for address of the
9294 TYPE/CLASS vtable and store it in c->low. The hash expression
9295 is stored in c->high and is used to resolve intrinsic cases. */
9296 if (c
->ts
.type
!= BT_UNKNOWN
)
9298 if (c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
9300 vtab
= gfc_find_derived_vtab (c
->ts
.u
.derived
);
9302 c
->high
= gfc_get_int_expr (gfc_integer_4_kind
, NULL
,
9303 c
->ts
.u
.derived
->hash_value
);
9307 vtab
= gfc_find_vtab (&c
->ts
);
9308 gcc_assert (vtab
&& CLASS_DATA (vtab
)->initializer
);
9309 e
= CLASS_DATA (vtab
)->initializer
;
9310 c
->high
= gfc_copy_expr (e
);
9311 if (c
->high
->ts
.kind
!= gfc_integer_4_kind
)
9314 ts
.kind
= gfc_integer_4_kind
;
9315 ts
.type
= BT_INTEGER
;
9316 gfc_convert_type_warn (c
->high
, &ts
, 2, 0);
9320 e
= gfc_lval_expr_from_sym (vtab
);
9321 c
->low
= build_loc_call (e
);
9326 /* Associate temporary to selector. This should only be done
9327 when this case is actually true, so build a new ASSOCIATE
9328 that does precisely this here (instead of using the
9331 if (c
->ts
.type
== BT_CLASS
)
9332 sprintf (name
, "__tmp_class_%s", c
->ts
.u
.derived
->name
);
9333 else if (c
->ts
.type
== BT_DERIVED
)
9334 sprintf (name
, "__tmp_type_%s", c
->ts
.u
.derived
->name
);
9335 else if (c
->ts
.type
== BT_CHARACTER
)
9337 HOST_WIDE_INT charlen
= 0;
9338 if (c
->ts
.u
.cl
&& c
->ts
.u
.cl
->length
9339 && c
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
)
9340 charlen
= gfc_mpz_get_hwi (c
->ts
.u
.cl
->length
->value
.integer
);
9341 snprintf (name
, sizeof (name
),
9342 "__tmp_%s_" HOST_WIDE_INT_PRINT_DEC
"_%d",
9343 gfc_basic_typename (c
->ts
.type
), charlen
, c
->ts
.kind
);
9346 sprintf (name
, "__tmp_%s_%d", gfc_basic_typename (c
->ts
.type
),
9349 st
= gfc_find_symtree (ns
->sym_root
, name
);
9350 gcc_assert (st
->n
.sym
->assoc
);
9351 st
->n
.sym
->assoc
->target
= gfc_get_variable_expr (selector_expr
->symtree
);
9352 st
->n
.sym
->assoc
->target
->where
= selector_expr
->where
;
9353 if (c
->ts
.type
!= BT_CLASS
&& c
->ts
.type
!= BT_UNKNOWN
)
9355 gfc_add_data_component (st
->n
.sym
->assoc
->target
);
9356 /* Fixup the target expression if necessary. */
9358 fixup_array_ref (&st
->n
.sym
->assoc
->target
, NULL
, rank
, ref
);
9361 new_st
= gfc_get_code (EXEC_BLOCK
);
9362 new_st
->ext
.block
.ns
= gfc_build_block_ns (ns
);
9363 new_st
->ext
.block
.ns
->code
= body
->next
;
9364 body
->next
= new_st
;
9366 /* Chain in the new list only if it is marked as dangling. Otherwise
9367 there is a CASE label overlap and this is already used. Just ignore,
9368 the error is diagnosed elsewhere. */
9369 if (st
->n
.sym
->assoc
->dangling
)
9371 new_st
->ext
.block
.assoc
= st
->n
.sym
->assoc
;
9372 st
->n
.sym
->assoc
->dangling
= 0;
9375 resolve_assoc_var (st
->n
.sym
, false);
9378 /* Take out CLASS IS cases for separate treatment. */
9380 while (body
&& body
->block
)
9382 if (body
->block
->ext
.block
.case_list
->ts
.type
== BT_CLASS
)
9384 /* Add to class_is list. */
9385 if (class_is
== NULL
)
9387 class_is
= body
->block
;
9392 for (tail
= class_is
; tail
->block
; tail
= tail
->block
) ;
9393 tail
->block
= body
->block
;
9396 /* Remove from EXEC_SELECT list. */
9397 body
->block
= body
->block
->block
;
9410 /* Add a default case to hold the CLASS IS cases. */
9411 for (tail
= code
; tail
->block
; tail
= tail
->block
) ;
9412 tail
->block
= gfc_get_code (EXEC_SELECT_TYPE
);
9414 tail
->ext
.block
.case_list
= gfc_get_case ();
9415 tail
->ext
.block
.case_list
->ts
.type
= BT_UNKNOWN
;
9417 default_case
= tail
;
9420 /* More than one CLASS IS block? */
9421 if (class_is
->block
)
9425 /* Sort CLASS IS blocks by extension level. */
9429 for (c1
= &class_is
; (*c1
) && (*c1
)->block
; c1
= &((*c1
)->block
))
9432 /* F03:C817 (check for doubles). */
9433 if ((*c1
)->ext
.block
.case_list
->ts
.u
.derived
->hash_value
9434 == c2
->ext
.block
.case_list
->ts
.u
.derived
->hash_value
)
9436 gfc_error ("Double CLASS IS block in SELECT TYPE "
9438 &c2
->ext
.block
.case_list
->where
);
9441 if ((*c1
)->ext
.block
.case_list
->ts
.u
.derived
->attr
.extension
9442 < c2
->ext
.block
.case_list
->ts
.u
.derived
->attr
.extension
)
9445 (*c1
)->block
= c2
->block
;
9455 /* Generate IF chain. */
9456 if_st
= gfc_get_code (EXEC_IF
);
9458 for (body
= class_is
; body
; body
= body
->block
)
9460 new_st
->block
= gfc_get_code (EXEC_IF
);
9461 new_st
= new_st
->block
;
9462 /* Set up IF condition: Call _gfortran_is_extension_of. */
9463 new_st
->expr1
= gfc_get_expr ();
9464 new_st
->expr1
->expr_type
= EXPR_FUNCTION
;
9465 new_st
->expr1
->ts
.type
= BT_LOGICAL
;
9466 new_st
->expr1
->ts
.kind
= 4;
9467 new_st
->expr1
->value
.function
.name
= gfc_get_string (PREFIX ("is_extension_of"));
9468 new_st
->expr1
->value
.function
.isym
= XCNEW (gfc_intrinsic_sym
);
9469 new_st
->expr1
->value
.function
.isym
->id
= GFC_ISYM_EXTENDS_TYPE_OF
;
9470 /* Set up arguments. */
9471 new_st
->expr1
->value
.function
.actual
= gfc_get_actual_arglist ();
9472 new_st
->expr1
->value
.function
.actual
->expr
= gfc_get_variable_expr (selector_expr
->symtree
);
9473 new_st
->expr1
->value
.function
.actual
->expr
->where
= code
->loc
;
9474 new_st
->expr1
->where
= code
->loc
;
9475 gfc_add_vptr_component (new_st
->expr1
->value
.function
.actual
->expr
);
9476 vtab
= gfc_find_derived_vtab (body
->ext
.block
.case_list
->ts
.u
.derived
);
9477 st
= gfc_find_symtree (vtab
->ns
->sym_root
, vtab
->name
);
9478 new_st
->expr1
->value
.function
.actual
->next
= gfc_get_actual_arglist ();
9479 new_st
->expr1
->value
.function
.actual
->next
->expr
= gfc_get_variable_expr (st
);
9480 new_st
->expr1
->value
.function
.actual
->next
->expr
->where
= code
->loc
;
9481 new_st
->next
= body
->next
;
9483 if (default_case
->next
)
9485 new_st
->block
= gfc_get_code (EXEC_IF
);
9486 new_st
= new_st
->block
;
9487 new_st
->next
= default_case
->next
;
9490 /* Replace CLASS DEFAULT code by the IF chain. */
9491 default_case
->next
= if_st
;
9494 /* Resolve the internal code. This cannot be done earlier because
9495 it requires that the sym->assoc of selectors is set already. */
9496 gfc_current_ns
= ns
;
9497 gfc_resolve_blocks (code
->block
, gfc_current_ns
);
9498 gfc_current_ns
= old_ns
;
9505 /* Resolve a SELECT RANK statement. */
9508 resolve_select_rank (gfc_code
*code
, gfc_namespace
*old_ns
)
9511 gfc_code
*body
, *new_st
, *tail
;
9513 char tname
[GFC_MAX_SYMBOL_LEN
];
9514 char name
[2 * GFC_MAX_SYMBOL_LEN
];
9516 gfc_expr
*selector_expr
= NULL
;
9518 HOST_WIDE_INT charlen
= 0;
9520 ns
= code
->ext
.block
.ns
;
9523 code
->op
= EXEC_BLOCK
;
9526 gfc_association_list
* assoc
;
9528 assoc
= gfc_get_association_list ();
9529 assoc
->st
= code
->expr1
->symtree
;
9530 assoc
->target
= gfc_copy_expr (code
->expr2
);
9531 assoc
->target
->where
= code
->expr2
->where
;
9532 /* assoc->variable will be set by resolve_assoc_var. */
9534 code
->ext
.block
.assoc
= assoc
;
9535 code
->expr1
->symtree
->n
.sym
->assoc
= assoc
;
9537 resolve_assoc_var (code
->expr1
->symtree
->n
.sym
, false);
9540 code
->ext
.block
.assoc
= NULL
;
9542 /* Loop over RANK cases. Note that returning on the errors causes a
9543 cascade of further errors because the case blocks do not compile
9545 for (body
= code
->block
; body
; body
= body
->block
)
9547 c
= body
->ext
.block
.case_list
;
9549 case_value
= (int) mpz_get_si (c
->low
->value
.integer
);
9553 /* Check for repeated cases. */
9554 for (tail
= code
->block
; tail
; tail
= tail
->block
)
9556 gfc_case
*d
= tail
->ext
.block
.case_list
;
9562 /* Check F2018: C1153. */
9563 if (!c
->low
&& !d
->low
)
9564 gfc_error ("RANK DEFAULT at %L is repeated at %L",
9565 &c
->where
, &d
->where
);
9567 if (!c
->low
|| !d
->low
)
9570 /* Check F2018: C1153. */
9571 case_value2
= (int) mpz_get_si (d
->low
->value
.integer
);
9572 if ((case_value
== case_value2
) && case_value
== -1)
9573 gfc_error ("RANK (*) at %L is repeated at %L",
9574 &c
->where
, &d
->where
);
9575 else if (case_value
== case_value2
)
9576 gfc_error ("RANK (%i) at %L is repeated at %L",
9577 case_value
, &c
->where
, &d
->where
);
9583 /* Check F2018: C1155. */
9584 if (case_value
== -1 && (gfc_expr_attr (code
->expr1
).allocatable
9585 || gfc_expr_attr (code
->expr1
).pointer
))
9586 gfc_error ("RANK (*) at %L cannot be used with the pointer or "
9587 "allocatable selector at %L", &c
->where
, &code
->expr1
->where
);
9589 if (case_value
== -1 && (gfc_expr_attr (code
->expr1
).allocatable
9590 || gfc_expr_attr (code
->expr1
).pointer
))
9591 gfc_error ("RANK (*) at %L cannot be used with the pointer or "
9592 "allocatable selector at %L", &c
->where
, &code
->expr1
->where
);
9595 /* Add EXEC_SELECT to switch on rank. */
9596 new_st
= gfc_get_code (code
->op
);
9597 new_st
->expr1
= code
->expr1
;
9598 new_st
->expr2
= code
->expr2
;
9599 new_st
->block
= code
->block
;
9600 code
->expr1
= code
->expr2
= NULL
;
9605 ns
->code
->next
= new_st
;
9607 code
->op
= EXEC_SELECT_RANK
;
9609 selector_expr
= code
->expr1
;
9611 /* Loop over SELECT RANK cases. */
9612 for (body
= code
->block
; body
; body
= body
->block
)
9614 c
= body
->ext
.block
.case_list
;
9617 /* Pass on the default case. */
9621 /* Associate temporary to selector. This should only be done
9622 when this case is actually true, so build a new ASSOCIATE
9623 that does precisely this here (instead of using the
9625 if (c
->ts
.type
== BT_CHARACTER
&& c
->ts
.u
.cl
&& c
->ts
.u
.cl
->length
9626 && c
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
)
9627 charlen
= gfc_mpz_get_hwi (c
->ts
.u
.cl
->length
->value
.integer
);
9629 if (c
->ts
.type
== BT_CLASS
)
9630 sprintf (tname
, "class_%s", c
->ts
.u
.derived
->name
);
9631 else if (c
->ts
.type
== BT_DERIVED
)
9632 sprintf (tname
, "type_%s", c
->ts
.u
.derived
->name
);
9633 else if (c
->ts
.type
!= BT_CHARACTER
)
9634 sprintf (tname
, "%s_%d", gfc_basic_typename (c
->ts
.type
), c
->ts
.kind
);
9636 sprintf (tname
, "%s_" HOST_WIDE_INT_PRINT_DEC
"_%d",
9637 gfc_basic_typename (c
->ts
.type
), charlen
, c
->ts
.kind
);
9639 case_value
= (int) mpz_get_si (c
->low
->value
.integer
);
9640 if (case_value
>= 0)
9641 sprintf (name
, "__tmp_%s_rank_%d", tname
, case_value
);
9643 sprintf (name
, "__tmp_%s_rank_m%d", tname
, -case_value
);
9645 st
= gfc_find_symtree (ns
->sym_root
, name
);
9646 gcc_assert (st
->n
.sym
->assoc
);
9648 st
->n
.sym
->assoc
->target
= gfc_get_variable_expr (selector_expr
->symtree
);
9649 st
->n
.sym
->assoc
->target
->where
= selector_expr
->where
;
9651 new_st
= gfc_get_code (EXEC_BLOCK
);
9652 new_st
->ext
.block
.ns
= gfc_build_block_ns (ns
);
9653 new_st
->ext
.block
.ns
->code
= body
->next
;
9654 body
->next
= new_st
;
9656 /* Chain in the new list only if it is marked as dangling. Otherwise
9657 there is a CASE label overlap and this is already used. Just ignore,
9658 the error is diagnosed elsewhere. */
9659 if (st
->n
.sym
->assoc
->dangling
)
9661 new_st
->ext
.block
.assoc
= st
->n
.sym
->assoc
;
9662 st
->n
.sym
->assoc
->dangling
= 0;
9665 resolve_assoc_var (st
->n
.sym
, false);
9668 gfc_current_ns
= ns
;
9669 gfc_resolve_blocks (code
->block
, gfc_current_ns
);
9670 gfc_current_ns
= old_ns
;
9674 /* Resolve a transfer statement. This is making sure that:
9675 -- a derived type being transferred has only non-pointer components
9676 -- a derived type being transferred doesn't have private components, unless
9677 it's being transferred from the module where the type was defined
9678 -- we're not trying to transfer a whole assumed size array. */
9681 resolve_transfer (gfc_code
*code
)
9683 gfc_symbol
*sym
, *derived
;
9687 bool formatted
= false;
9688 gfc_dt
*dt
= code
->ext
.dt
;
9689 gfc_symbol
*dtio_sub
= NULL
;
9693 while (exp
!= NULL
&& exp
->expr_type
== EXPR_OP
9694 && exp
->value
.op
.op
== INTRINSIC_PARENTHESES
)
9695 exp
= exp
->value
.op
.op1
;
9697 if (exp
&& exp
->expr_type
== EXPR_NULL
9700 gfc_error ("Invalid context for NULL () intrinsic at %L",
9705 if (exp
== NULL
|| (exp
->expr_type
!= EXPR_VARIABLE
9706 && exp
->expr_type
!= EXPR_FUNCTION
9707 && exp
->expr_type
!= EXPR_STRUCTURE
))
9710 /* If we are reading, the variable will be changed. Note that
9711 code->ext.dt may be NULL if the TRANSFER is related to
9712 an INQUIRE statement -- but in this case, we are not reading, either. */
9713 if (dt
&& dt
->dt_io_kind
->value
.iokind
== M_READ
9714 && !gfc_check_vardef_context (exp
, false, false, false,
9718 const gfc_typespec
*ts
= exp
->expr_type
== EXPR_STRUCTURE
9719 || exp
->expr_type
== EXPR_FUNCTION
9720 ? &exp
->ts
: &exp
->symtree
->n
.sym
->ts
;
9722 /* Go to actual component transferred. */
9723 for (ref
= exp
->ref
; ref
; ref
= ref
->next
)
9724 if (ref
->type
== REF_COMPONENT
)
9725 ts
= &ref
->u
.c
.component
->ts
;
9727 if (dt
&& dt
->dt_io_kind
->value
.iokind
!= M_INQUIRE
9728 && (ts
->type
== BT_DERIVED
|| ts
->type
== BT_CLASS
))
9730 derived
= ts
->u
.derived
;
9732 /* Determine when to use the formatted DTIO procedure. */
9733 if (dt
&& (dt
->format_expr
|| dt
->format_label
))
9736 write
= dt
->dt_io_kind
->value
.iokind
== M_WRITE
9737 || dt
->dt_io_kind
->value
.iokind
== M_PRINT
;
9738 dtio_sub
= gfc_find_specific_dtio_proc (derived
, write
, formatted
);
9740 if (dtio_sub
!= NULL
&& exp
->expr_type
== EXPR_VARIABLE
)
9743 sym
= exp
->symtree
->n
.sym
->ns
->proc_name
;
9744 /* Check to see if this is a nested DTIO call, with the
9745 dummy as the io-list object. */
9746 if (sym
&& sym
== dtio_sub
&& sym
->formal
9747 && sym
->formal
->sym
== exp
->symtree
->n
.sym
9748 && exp
->ref
== NULL
)
9750 if (!sym
->attr
.recursive
)
9752 gfc_error ("DTIO %s procedure at %L must be recursive",
9753 sym
->name
, &sym
->declared_at
);
9760 if (ts
->type
== BT_CLASS
&& dtio_sub
== NULL
)
9762 gfc_error ("Data transfer element at %L cannot be polymorphic unless "
9763 "it is processed by a defined input/output procedure",
9768 if (ts
->type
== BT_DERIVED
)
9770 /* Check that transferred derived type doesn't contain POINTER
9771 components unless it is processed by a defined input/output
9773 if (ts
->u
.derived
->attr
.pointer_comp
&& dtio_sub
== NULL
)
9775 gfc_error ("Data transfer element at %L cannot have POINTER "
9776 "components unless it is processed by a defined "
9777 "input/output procedure", &code
->loc
);
9782 if (ts
->u
.derived
->attr
.proc_pointer_comp
)
9784 gfc_error ("Data transfer element at %L cannot have "
9785 "procedure pointer components", &code
->loc
);
9789 if (ts
->u
.derived
->attr
.alloc_comp
&& dtio_sub
== NULL
)
9791 gfc_error ("Data transfer element at %L cannot have ALLOCATABLE "
9792 "components unless it is processed by a defined "
9793 "input/output procedure", &code
->loc
);
9797 /* C_PTR and C_FUNPTR have private components which means they cannot
9798 be printed. However, if -std=gnu and not -pedantic, allow
9799 the component to be printed to help debugging. */
9800 if (ts
->u
.derived
->ts
.f90_type
== BT_VOID
)
9802 if (!gfc_notify_std (GFC_STD_GNU
, "Data transfer element at %L "
9803 "cannot have PRIVATE components", &code
->loc
))
9806 else if (derived_inaccessible (ts
->u
.derived
) && dtio_sub
== NULL
)
9808 gfc_error ("Data transfer element at %L cannot have "
9809 "PRIVATE components unless it is processed by "
9810 "a defined input/output procedure", &code
->loc
);
9815 if (exp
->expr_type
== EXPR_STRUCTURE
)
9818 sym
= exp
->symtree
->n
.sym
;
9820 if (sym
->as
!= NULL
&& sym
->as
->type
== AS_ASSUMED_SIZE
&& exp
->ref
9821 && exp
->ref
->type
== REF_ARRAY
&& exp
->ref
->u
.ar
.type
== AR_FULL
)
9823 gfc_error ("Data transfer element at %L cannot be a full reference to "
9824 "an assumed-size array", &code
->loc
);
9828 if (async_io_dt
&& exp
->expr_type
== EXPR_VARIABLE
)
9829 exp
->symtree
->n
.sym
->attr
.asynchronous
= 1;
9833 /*********** Toplevel code resolution subroutines ***********/
9835 /* Find the set of labels that are reachable from this block. We also
9836 record the last statement in each block. */
9839 find_reachable_labels (gfc_code
*block
)
9846 cs_base
->reachable_labels
= bitmap_alloc (&labels_obstack
);
9848 /* Collect labels in this block. We don't keep those corresponding
9849 to END {IF|SELECT}, these are checked in resolve_branch by going
9850 up through the code_stack. */
9851 for (c
= block
; c
; c
= c
->next
)
9853 if (c
->here
&& c
->op
!= EXEC_END_NESTED_BLOCK
)
9854 bitmap_set_bit (cs_base
->reachable_labels
, c
->here
->value
);
9857 /* Merge with labels from parent block. */
9860 gcc_assert (cs_base
->prev
->reachable_labels
);
9861 bitmap_ior_into (cs_base
->reachable_labels
,
9862 cs_base
->prev
->reachable_labels
);
9868 resolve_lock_unlock_event (gfc_code
*code
)
9870 if (code
->expr1
->expr_type
== EXPR_FUNCTION
9871 && code
->expr1
->value
.function
.isym
9872 && code
->expr1
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
)
9873 remove_caf_get_intrinsic (code
->expr1
);
9875 if ((code
->op
== EXEC_LOCK
|| code
->op
== EXEC_UNLOCK
)
9876 && (code
->expr1
->ts
.type
!= BT_DERIVED
9877 || code
->expr1
->expr_type
!= EXPR_VARIABLE
9878 || code
->expr1
->ts
.u
.derived
->from_intmod
!= INTMOD_ISO_FORTRAN_ENV
9879 || code
->expr1
->ts
.u
.derived
->intmod_sym_id
!= ISOFORTRAN_LOCK_TYPE
9880 || code
->expr1
->rank
!= 0
9881 || (!gfc_is_coarray (code
->expr1
) &&
9882 !gfc_is_coindexed (code
->expr1
))))
9883 gfc_error ("Lock variable at %L must be a scalar of type LOCK_TYPE",
9884 &code
->expr1
->where
);
9885 else if ((code
->op
== EXEC_EVENT_POST
|| code
->op
== EXEC_EVENT_WAIT
)
9886 && (code
->expr1
->ts
.type
!= BT_DERIVED
9887 || code
->expr1
->expr_type
!= EXPR_VARIABLE
9888 || code
->expr1
->ts
.u
.derived
->from_intmod
9889 != INTMOD_ISO_FORTRAN_ENV
9890 || code
->expr1
->ts
.u
.derived
->intmod_sym_id
9891 != ISOFORTRAN_EVENT_TYPE
9892 || code
->expr1
->rank
!= 0))
9893 gfc_error ("Event variable at %L must be a scalar of type EVENT_TYPE",
9894 &code
->expr1
->where
);
9895 else if (code
->op
== EXEC_EVENT_POST
&& !gfc_is_coarray (code
->expr1
)
9896 && !gfc_is_coindexed (code
->expr1
))
9897 gfc_error ("Event variable argument at %L must be a coarray or coindexed",
9898 &code
->expr1
->where
);
9899 else if (code
->op
== EXEC_EVENT_WAIT
&& !gfc_is_coarray (code
->expr1
))
9900 gfc_error ("Event variable argument at %L must be a coarray but not "
9901 "coindexed", &code
->expr1
->where
);
9905 && (code
->expr2
->ts
.type
!= BT_INTEGER
|| code
->expr2
->rank
!= 0
9906 || code
->expr2
->expr_type
!= EXPR_VARIABLE
))
9907 gfc_error ("STAT= argument at %L must be a scalar INTEGER variable",
9908 &code
->expr2
->where
);
9911 && !gfc_check_vardef_context (code
->expr2
, false, false, false,
9912 _("STAT variable")))
9917 && (code
->expr3
->ts
.type
!= BT_CHARACTER
|| code
->expr3
->rank
!= 0
9918 || code
->expr3
->expr_type
!= EXPR_VARIABLE
))
9919 gfc_error ("ERRMSG= argument at %L must be a scalar CHARACTER variable",
9920 &code
->expr3
->where
);
9923 && !gfc_check_vardef_context (code
->expr3
, false, false, false,
9924 _("ERRMSG variable")))
9927 /* Check for LOCK the ACQUIRED_LOCK. */
9928 if (code
->op
!= EXEC_EVENT_WAIT
&& code
->expr4
9929 && (code
->expr4
->ts
.type
!= BT_LOGICAL
|| code
->expr4
->rank
!= 0
9930 || code
->expr4
->expr_type
!= EXPR_VARIABLE
))
9931 gfc_error ("ACQUIRED_LOCK= argument at %L must be a scalar LOGICAL "
9932 "variable", &code
->expr4
->where
);
9934 if (code
->op
!= EXEC_EVENT_WAIT
&& code
->expr4
9935 && !gfc_check_vardef_context (code
->expr4
, false, false, false,
9936 _("ACQUIRED_LOCK variable")))
9939 /* Check for EVENT WAIT the UNTIL_COUNT. */
9940 if (code
->op
== EXEC_EVENT_WAIT
&& code
->expr4
)
9942 if (!gfc_resolve_expr (code
->expr4
) || code
->expr4
->ts
.type
!= BT_INTEGER
9943 || code
->expr4
->rank
!= 0)
9944 gfc_error ("UNTIL_COUNT= argument at %L must be a scalar INTEGER "
9945 "expression", &code
->expr4
->where
);
9951 resolve_critical (gfc_code
*code
)
9953 gfc_symtree
*symtree
;
9954 gfc_symbol
*lock_type
;
9955 char name
[GFC_MAX_SYMBOL_LEN
];
9956 static int serial
= 0;
9958 if (flag_coarray
!= GFC_FCOARRAY_LIB
)
9961 symtree
= gfc_find_symtree (gfc_current_ns
->sym_root
,
9962 GFC_PREFIX ("lock_type"));
9964 lock_type
= symtree
->n
.sym
;
9967 if (gfc_get_sym_tree (GFC_PREFIX ("lock_type"), gfc_current_ns
, &symtree
,
9970 lock_type
= symtree
->n
.sym
;
9971 lock_type
->attr
.flavor
= FL_DERIVED
;
9972 lock_type
->attr
.zero_comp
= 1;
9973 lock_type
->from_intmod
= INTMOD_ISO_FORTRAN_ENV
;
9974 lock_type
->intmod_sym_id
= ISOFORTRAN_LOCK_TYPE
;
9977 sprintf(name
, GFC_PREFIX ("lock_var") "%d",serial
++);
9978 if (gfc_get_sym_tree (name
, gfc_current_ns
, &symtree
, false) != 0)
9981 code
->resolved_sym
= symtree
->n
.sym
;
9982 symtree
->n
.sym
->attr
.flavor
= FL_VARIABLE
;
9983 symtree
->n
.sym
->attr
.referenced
= 1;
9984 symtree
->n
.sym
->attr
.artificial
= 1;
9985 symtree
->n
.sym
->attr
.codimension
= 1;
9986 symtree
->n
.sym
->ts
.type
= BT_DERIVED
;
9987 symtree
->n
.sym
->ts
.u
.derived
= lock_type
;
9988 symtree
->n
.sym
->as
= gfc_get_array_spec ();
9989 symtree
->n
.sym
->as
->corank
= 1;
9990 symtree
->n
.sym
->as
->type
= AS_EXPLICIT
;
9991 symtree
->n
.sym
->as
->cotype
= AS_EXPLICIT
;
9992 symtree
->n
.sym
->as
->lower
[0] = gfc_get_int_expr (gfc_default_integer_kind
,
9994 gfc_commit_symbols();
9999 resolve_sync (gfc_code
*code
)
10001 /* Check imageset. The * case matches expr1 == NULL. */
10004 if (code
->expr1
->ts
.type
!= BT_INTEGER
|| code
->expr1
->rank
> 1)
10005 gfc_error ("Imageset argument at %L must be a scalar or rank-1 "
10006 "INTEGER expression", &code
->expr1
->where
);
10007 if (code
->expr1
->expr_type
== EXPR_CONSTANT
&& code
->expr1
->rank
== 0
10008 && mpz_cmp_si (code
->expr1
->value
.integer
, 1) < 0)
10009 gfc_error ("Imageset argument at %L must between 1 and num_images()",
10010 &code
->expr1
->where
);
10011 else if (code
->expr1
->expr_type
== EXPR_ARRAY
10012 && gfc_simplify_expr (code
->expr1
, 0))
10014 gfc_constructor
*cons
;
10015 cons
= gfc_constructor_first (code
->expr1
->value
.constructor
);
10016 for (; cons
; cons
= gfc_constructor_next (cons
))
10017 if (cons
->expr
->expr_type
== EXPR_CONSTANT
10018 && mpz_cmp_si (cons
->expr
->value
.integer
, 1) < 0)
10019 gfc_error ("Imageset argument at %L must between 1 and "
10020 "num_images()", &cons
->expr
->where
);
10025 gfc_resolve_expr (code
->expr2
);
10027 && (code
->expr2
->ts
.type
!= BT_INTEGER
|| code
->expr2
->rank
!= 0
10028 || code
->expr2
->expr_type
!= EXPR_VARIABLE
))
10029 gfc_error ("STAT= argument at %L must be a scalar INTEGER variable",
10030 &code
->expr2
->where
);
10032 /* Check ERRMSG. */
10033 gfc_resolve_expr (code
->expr3
);
10035 && (code
->expr3
->ts
.type
!= BT_CHARACTER
|| code
->expr3
->rank
!= 0
10036 || code
->expr3
->expr_type
!= EXPR_VARIABLE
))
10037 gfc_error ("ERRMSG= argument at %L must be a scalar CHARACTER variable",
10038 &code
->expr3
->where
);
10042 /* Given a branch to a label, see if the branch is conforming.
10043 The code node describes where the branch is located. */
10046 resolve_branch (gfc_st_label
*label
, gfc_code
*code
)
10053 /* Step one: is this a valid branching target? */
10055 if (label
->defined
== ST_LABEL_UNKNOWN
)
10057 gfc_error ("Label %d referenced at %L is never defined", label
->value
,
10062 if (label
->defined
!= ST_LABEL_TARGET
&& label
->defined
!= ST_LABEL_DO_TARGET
)
10064 gfc_error ("Statement at %L is not a valid branch target statement "
10065 "for the branch statement at %L", &label
->where
, &code
->loc
);
10069 /* Step two: make sure this branch is not a branch to itself ;-) */
10071 if (code
->here
== label
)
10074 "Branch at %L may result in an infinite loop", &code
->loc
);
10078 /* Step three: See if the label is in the same block as the
10079 branching statement. The hard work has been done by setting up
10080 the bitmap reachable_labels. */
10082 if (bitmap_bit_p (cs_base
->reachable_labels
, label
->value
))
10084 /* Check now whether there is a CRITICAL construct; if so, check
10085 whether the label is still visible outside of the CRITICAL block,
10086 which is invalid. */
10087 for (stack
= cs_base
; stack
; stack
= stack
->prev
)
10089 if (stack
->current
->op
== EXEC_CRITICAL
10090 && bitmap_bit_p (stack
->reachable_labels
, label
->value
))
10091 gfc_error ("GOTO statement at %L leaves CRITICAL construct for "
10092 "label at %L", &code
->loc
, &label
->where
);
10093 else if (stack
->current
->op
== EXEC_DO_CONCURRENT
10094 && bitmap_bit_p (stack
->reachable_labels
, label
->value
))
10095 gfc_error ("GOTO statement at %L leaves DO CONCURRENT construct "
10096 "for label at %L", &code
->loc
, &label
->where
);
10102 /* Step four: If we haven't found the label in the bitmap, it may
10103 still be the label of the END of the enclosing block, in which
10104 case we find it by going up the code_stack. */
10106 for (stack
= cs_base
; stack
; stack
= stack
->prev
)
10108 if (stack
->current
->next
&& stack
->current
->next
->here
== label
)
10110 if (stack
->current
->op
== EXEC_CRITICAL
)
10112 /* Note: A label at END CRITICAL does not leave the CRITICAL
10113 construct as END CRITICAL is still part of it. */
10114 gfc_error ("GOTO statement at %L leaves CRITICAL construct for label"
10115 " at %L", &code
->loc
, &label
->where
);
10118 else if (stack
->current
->op
== EXEC_DO_CONCURRENT
)
10120 gfc_error ("GOTO statement at %L leaves DO CONCURRENT construct for "
10121 "label at %L", &code
->loc
, &label
->where
);
10128 gcc_assert (stack
->current
->next
->op
== EXEC_END_NESTED_BLOCK
);
10132 /* The label is not in an enclosing block, so illegal. This was
10133 allowed in Fortran 66, so we allow it as extension. No
10134 further checks are necessary in this case. */
10135 gfc_notify_std (GFC_STD_LEGACY
, "Label at %L is not in the same block "
10136 "as the GOTO statement at %L", &label
->where
,
10142 /* Check whether EXPR1 has the same shape as EXPR2. */
10145 resolve_where_shape (gfc_expr
*expr1
, gfc_expr
*expr2
)
10147 mpz_t shape
[GFC_MAX_DIMENSIONS
];
10148 mpz_t shape2
[GFC_MAX_DIMENSIONS
];
10149 bool result
= false;
10152 /* Compare the rank. */
10153 if (expr1
->rank
!= expr2
->rank
)
10156 /* Compare the size of each dimension. */
10157 for (i
=0; i
<expr1
->rank
; i
++)
10159 if (!gfc_array_dimen_size (expr1
, i
, &shape
[i
]))
10162 if (!gfc_array_dimen_size (expr2
, i
, &shape2
[i
]))
10165 if (mpz_cmp (shape
[i
], shape2
[i
]))
10169 /* When either of the two expression is an assumed size array, we
10170 ignore the comparison of dimension sizes. */
10175 gfc_clear_shape (shape
, i
);
10176 gfc_clear_shape (shape2
, i
);
10181 /* Check whether a WHERE assignment target or a WHERE mask expression
10182 has the same shape as the outmost WHERE mask expression. */
10185 resolve_where (gfc_code
*code
, gfc_expr
*mask
)
10189 gfc_expr
*e
= NULL
;
10191 cblock
= code
->block
;
10193 /* Store the first WHERE mask-expr of the WHERE statement or construct.
10194 In case of nested WHERE, only the outmost one is stored. */
10195 if (mask
== NULL
) /* outmost WHERE */
10197 else /* inner WHERE */
10204 /* Check if the mask-expr has a consistent shape with the
10205 outmost WHERE mask-expr. */
10206 if (!resolve_where_shape (cblock
->expr1
, e
))
10207 gfc_error ("WHERE mask at %L has inconsistent shape",
10208 &cblock
->expr1
->where
);
10211 /* the assignment statement of a WHERE statement, or the first
10212 statement in where-body-construct of a WHERE construct */
10213 cnext
= cblock
->next
;
10218 /* WHERE assignment statement */
10221 /* Check shape consistent for WHERE assignment target. */
10222 if (e
&& !resolve_where_shape (cnext
->expr1
, e
))
10223 gfc_error ("WHERE assignment target at %L has "
10224 "inconsistent shape", &cnext
->expr1
->where
);
10228 case EXEC_ASSIGN_CALL
:
10229 resolve_call (cnext
);
10230 if (!cnext
->resolved_sym
->attr
.elemental
)
10231 gfc_error("Non-ELEMENTAL user-defined assignment in WHERE at %L",
10232 &cnext
->ext
.actual
->expr
->where
);
10235 /* WHERE or WHERE construct is part of a where-body-construct */
10237 resolve_where (cnext
, e
);
10241 gfc_error ("Unsupported statement inside WHERE at %L",
10244 /* the next statement within the same where-body-construct */
10245 cnext
= cnext
->next
;
10247 /* the next masked-elsewhere-stmt, elsewhere-stmt, or end-where-stmt */
10248 cblock
= cblock
->block
;
10253 /* Resolve assignment in FORALL construct.
10254 NVAR is the number of FORALL index variables, and VAR_EXPR records the
10255 FORALL index variables. */
10258 gfc_resolve_assign_in_forall (gfc_code
*code
, int nvar
, gfc_expr
**var_expr
)
10262 for (n
= 0; n
< nvar
; n
++)
10264 gfc_symbol
*forall_index
;
10266 forall_index
= var_expr
[n
]->symtree
->n
.sym
;
10268 /* Check whether the assignment target is one of the FORALL index
10270 if ((code
->expr1
->expr_type
== EXPR_VARIABLE
)
10271 && (code
->expr1
->symtree
->n
.sym
== forall_index
))
10272 gfc_error ("Assignment to a FORALL index variable at %L",
10273 &code
->expr1
->where
);
10276 /* If one of the FORALL index variables doesn't appear in the
10277 assignment variable, then there could be a many-to-one
10278 assignment. Emit a warning rather than an error because the
10279 mask could be resolving this problem. */
10280 if (!find_forall_index (code
->expr1
, forall_index
, 0))
10281 gfc_warning (0, "The FORALL with index %qs is not used on the "
10282 "left side of the assignment at %L and so might "
10283 "cause multiple assignment to this object",
10284 var_expr
[n
]->symtree
->name
, &code
->expr1
->where
);
10290 /* Resolve WHERE statement in FORALL construct. */
10293 gfc_resolve_where_code_in_forall (gfc_code
*code
, int nvar
,
10294 gfc_expr
**var_expr
)
10299 cblock
= code
->block
;
10302 /* the assignment statement of a WHERE statement, or the first
10303 statement in where-body-construct of a WHERE construct */
10304 cnext
= cblock
->next
;
10309 /* WHERE assignment statement */
10311 gfc_resolve_assign_in_forall (cnext
, nvar
, var_expr
);
10314 /* WHERE operator assignment statement */
10315 case EXEC_ASSIGN_CALL
:
10316 resolve_call (cnext
);
10317 if (!cnext
->resolved_sym
->attr
.elemental
)
10318 gfc_error("Non-ELEMENTAL user-defined assignment in WHERE at %L",
10319 &cnext
->ext
.actual
->expr
->where
);
10322 /* WHERE or WHERE construct is part of a where-body-construct */
10324 gfc_resolve_where_code_in_forall (cnext
, nvar
, var_expr
);
10328 gfc_error ("Unsupported statement inside WHERE at %L",
10331 /* the next statement within the same where-body-construct */
10332 cnext
= cnext
->next
;
10334 /* the next masked-elsewhere-stmt, elsewhere-stmt, or end-where-stmt */
10335 cblock
= cblock
->block
;
10340 /* Traverse the FORALL body to check whether the following errors exist:
10341 1. For assignment, check if a many-to-one assignment happens.
10342 2. For WHERE statement, check the WHERE body to see if there is any
10343 many-to-one assignment. */
10346 gfc_resolve_forall_body (gfc_code
*code
, int nvar
, gfc_expr
**var_expr
)
10350 c
= code
->block
->next
;
10356 case EXEC_POINTER_ASSIGN
:
10357 gfc_resolve_assign_in_forall (c
, nvar
, var_expr
);
10360 case EXEC_ASSIGN_CALL
:
10364 /* Because the gfc_resolve_blocks() will handle the nested FORALL,
10365 there is no need to handle it here. */
10369 gfc_resolve_where_code_in_forall(c
, nvar
, var_expr
);
10374 /* The next statement in the FORALL body. */
10380 /* Counts the number of iterators needed inside a forall construct, including
10381 nested forall constructs. This is used to allocate the needed memory
10382 in gfc_resolve_forall. */
10385 gfc_count_forall_iterators (gfc_code
*code
)
10387 int max_iters
, sub_iters
, current_iters
;
10388 gfc_forall_iterator
*fa
;
10390 gcc_assert(code
->op
== EXEC_FORALL
);
10394 for (fa
= code
->ext
.forall_iterator
; fa
; fa
= fa
->next
)
10397 code
= code
->block
->next
;
10401 if (code
->op
== EXEC_FORALL
)
10403 sub_iters
= gfc_count_forall_iterators (code
);
10404 if (sub_iters
> max_iters
)
10405 max_iters
= sub_iters
;
10410 return current_iters
+ max_iters
;
10414 /* Given a FORALL construct, first resolve the FORALL iterator, then call
10415 gfc_resolve_forall_body to resolve the FORALL body. */
10418 gfc_resolve_forall (gfc_code
*code
, gfc_namespace
*ns
, int forall_save
)
10420 static gfc_expr
**var_expr
;
10421 static int total_var
= 0;
10422 static int nvar
= 0;
10423 int i
, old_nvar
, tmp
;
10424 gfc_forall_iterator
*fa
;
10428 if (!gfc_notify_std (GFC_STD_F2018_OBS
, "FORALL construct at %L", &code
->loc
))
10431 /* Start to resolve a FORALL construct */
10432 if (forall_save
== 0)
10434 /* Count the total number of FORALL indices in the nested FORALL
10435 construct in order to allocate the VAR_EXPR with proper size. */
10436 total_var
= gfc_count_forall_iterators (code
);
10438 /* Allocate VAR_EXPR with NUMBER_OF_FORALL_INDEX elements. */
10439 var_expr
= XCNEWVEC (gfc_expr
*, total_var
);
10442 /* The information about FORALL iterator, including FORALL indices start, end
10443 and stride. An outer FORALL indice cannot appear in start, end or stride. */
10444 for (fa
= code
->ext
.forall_iterator
; fa
; fa
= fa
->next
)
10446 /* Fortran 20008: C738 (R753). */
10447 if (fa
->var
->ref
&& fa
->var
->ref
->type
== REF_ARRAY
)
10449 gfc_error ("FORALL index-name at %L must be a scalar variable "
10450 "of type integer", &fa
->var
->where
);
10454 /* Check if any outer FORALL index name is the same as the current
10456 for (i
= 0; i
< nvar
; i
++)
10458 if (fa
->var
->symtree
->n
.sym
== var_expr
[i
]->symtree
->n
.sym
)
10459 gfc_error ("An outer FORALL construct already has an index "
10460 "with this name %L", &fa
->var
->where
);
10463 /* Record the current FORALL index. */
10464 var_expr
[nvar
] = gfc_copy_expr (fa
->var
);
10468 /* No memory leak. */
10469 gcc_assert (nvar
<= total_var
);
10472 /* Resolve the FORALL body. */
10473 gfc_resolve_forall_body (code
, nvar
, var_expr
);
10475 /* May call gfc_resolve_forall to resolve the inner FORALL loop. */
10476 gfc_resolve_blocks (code
->block
, ns
);
10480 /* Free only the VAR_EXPRs allocated in this frame. */
10481 for (i
= nvar
; i
< tmp
; i
++)
10482 gfc_free_expr (var_expr
[i
]);
10486 /* We are in the outermost FORALL construct. */
10487 gcc_assert (forall_save
== 0);
10489 /* VAR_EXPR is not needed any more. */
10496 /* Resolve a BLOCK construct statement. */
10499 resolve_block_construct (gfc_code
* code
)
10501 /* Resolve the BLOCK's namespace. */
10502 gfc_resolve (code
->ext
.block
.ns
);
10504 /* For an ASSOCIATE block, the associations (and their targets) are already
10505 resolved during resolve_symbol. */
10509 /* Resolve lists of blocks found in IF, SELECT CASE, WHERE, FORALL, GOTO and
10513 gfc_resolve_blocks (gfc_code
*b
, gfc_namespace
*ns
)
10517 for (; b
; b
= b
->block
)
10519 t
= gfc_resolve_expr (b
->expr1
);
10520 if (!gfc_resolve_expr (b
->expr2
))
10526 if (t
&& b
->expr1
!= NULL
10527 && (b
->expr1
->ts
.type
!= BT_LOGICAL
|| b
->expr1
->rank
!= 0))
10528 gfc_error ("IF clause at %L requires a scalar LOGICAL expression",
10534 && b
->expr1
!= NULL
10535 && (b
->expr1
->ts
.type
!= BT_LOGICAL
|| b
->expr1
->rank
== 0))
10536 gfc_error ("WHERE/ELSEWHERE clause at %L requires a LOGICAL array",
10541 resolve_branch (b
->label1
, b
);
10545 resolve_block_construct (b
);
10549 case EXEC_SELECT_TYPE
:
10550 case EXEC_SELECT_RANK
:
10553 case EXEC_DO_WHILE
:
10554 case EXEC_DO_CONCURRENT
:
10555 case EXEC_CRITICAL
:
10558 case EXEC_IOLENGTH
:
10562 case EXEC_OMP_ATOMIC
:
10563 case EXEC_OACC_ATOMIC
:
10565 gfc_omp_atomic_op aop
10566 = (gfc_omp_atomic_op
) (b
->ext
.omp_atomic
& GFC_OMP_ATOMIC_MASK
);
10568 /* Verify this before calling gfc_resolve_code, which might
10570 gcc_assert (b
->next
&& b
->next
->op
== EXEC_ASSIGN
);
10571 gcc_assert (((aop
!= GFC_OMP_ATOMIC_CAPTURE
)
10572 && b
->next
->next
== NULL
)
10573 || ((aop
== GFC_OMP_ATOMIC_CAPTURE
)
10574 && b
->next
->next
!= NULL
10575 && b
->next
->next
->op
== EXEC_ASSIGN
10576 && b
->next
->next
->next
== NULL
));
10580 case EXEC_OACC_PARALLEL_LOOP
:
10581 case EXEC_OACC_PARALLEL
:
10582 case EXEC_OACC_KERNELS_LOOP
:
10583 case EXEC_OACC_KERNELS
:
10584 case EXEC_OACC_DATA
:
10585 case EXEC_OACC_HOST_DATA
:
10586 case EXEC_OACC_LOOP
:
10587 case EXEC_OACC_UPDATE
:
10588 case EXEC_OACC_WAIT
:
10589 case EXEC_OACC_CACHE
:
10590 case EXEC_OACC_ENTER_DATA
:
10591 case EXEC_OACC_EXIT_DATA
:
10592 case EXEC_OACC_ROUTINE
:
10593 case EXEC_OMP_CRITICAL
:
10594 case EXEC_OMP_DISTRIBUTE
:
10595 case EXEC_OMP_DISTRIBUTE_PARALLEL_DO
:
10596 case EXEC_OMP_DISTRIBUTE_PARALLEL_DO_SIMD
:
10597 case EXEC_OMP_DISTRIBUTE_SIMD
:
10599 case EXEC_OMP_DO_SIMD
:
10600 case EXEC_OMP_MASTER
:
10601 case EXEC_OMP_ORDERED
:
10602 case EXEC_OMP_PARALLEL
:
10603 case EXEC_OMP_PARALLEL_DO
:
10604 case EXEC_OMP_PARALLEL_DO_SIMD
:
10605 case EXEC_OMP_PARALLEL_SECTIONS
:
10606 case EXEC_OMP_PARALLEL_WORKSHARE
:
10607 case EXEC_OMP_SECTIONS
:
10608 case EXEC_OMP_SIMD
:
10609 case EXEC_OMP_SINGLE
:
10610 case EXEC_OMP_TARGET
:
10611 case EXEC_OMP_TARGET_DATA
:
10612 case EXEC_OMP_TARGET_ENTER_DATA
:
10613 case EXEC_OMP_TARGET_EXIT_DATA
:
10614 case EXEC_OMP_TARGET_PARALLEL
:
10615 case EXEC_OMP_TARGET_PARALLEL_DO
:
10616 case EXEC_OMP_TARGET_PARALLEL_DO_SIMD
:
10617 case EXEC_OMP_TARGET_SIMD
:
10618 case EXEC_OMP_TARGET_TEAMS
:
10619 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE
:
10620 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO
:
10621 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
10622 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_SIMD
:
10623 case EXEC_OMP_TARGET_UPDATE
:
10624 case EXEC_OMP_TASK
:
10625 case EXEC_OMP_TASKGROUP
:
10626 case EXEC_OMP_TASKLOOP
:
10627 case EXEC_OMP_TASKLOOP_SIMD
:
10628 case EXEC_OMP_TASKWAIT
:
10629 case EXEC_OMP_TASKYIELD
:
10630 case EXEC_OMP_TEAMS
:
10631 case EXEC_OMP_TEAMS_DISTRIBUTE
:
10632 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO
:
10633 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
10634 case EXEC_OMP_TEAMS_DISTRIBUTE_SIMD
:
10635 case EXEC_OMP_WORKSHARE
:
10639 gfc_internal_error ("gfc_resolve_blocks(): Bad block type");
10642 gfc_resolve_code (b
->next
, ns
);
10647 /* Does everything to resolve an ordinary assignment. Returns true
10648 if this is an interface assignment. */
10650 resolve_ordinary_assign (gfc_code
*code
, gfc_namespace
*ns
)
10657 symbol_attribute attr
;
10659 if (gfc_extend_assign (code
, ns
))
10663 if (code
->op
== EXEC_ASSIGN_CALL
)
10665 lhs
= code
->ext
.actual
->expr
;
10666 rhsptr
= &code
->ext
.actual
->next
->expr
;
10670 gfc_actual_arglist
* args
;
10671 gfc_typebound_proc
* tbp
;
10673 gcc_assert (code
->op
== EXEC_COMPCALL
);
10675 args
= code
->expr1
->value
.compcall
.actual
;
10677 rhsptr
= &args
->next
->expr
;
10679 tbp
= code
->expr1
->value
.compcall
.tbp
;
10680 gcc_assert (!tbp
->is_generic
);
10683 /* Make a temporary rhs when there is a default initializer
10684 and rhs is the same symbol as the lhs. */
10685 if ((*rhsptr
)->expr_type
== EXPR_VARIABLE
10686 && (*rhsptr
)->symtree
->n
.sym
->ts
.type
== BT_DERIVED
10687 && gfc_has_default_initializer ((*rhsptr
)->symtree
->n
.sym
->ts
.u
.derived
)
10688 && (lhs
->symtree
->n
.sym
== (*rhsptr
)->symtree
->n
.sym
))
10689 *rhsptr
= gfc_get_parentheses (*rhsptr
);
10697 /* Handle the case of a BOZ literal on the RHS. */
10698 if (rhs
->ts
.type
== BT_BOZ
)
10700 if (gfc_invalid_boz ("BOZ literal constant at %L is neither a DATA "
10701 "statement value nor an actual argument of "
10702 "INT/REAL/DBLE/CMPLX intrinsic subprogram",
10706 switch (lhs
->ts
.type
)
10709 if (!gfc_boz2int (rhs
, lhs
->ts
.kind
))
10713 if (!gfc_boz2real (rhs
, lhs
->ts
.kind
))
10717 gfc_error ("Invalid use of BOZ literal constant at %L", &rhs
->where
);
10722 if (lhs
->ts
.type
== BT_CHARACTER
&& warn_character_truncation
)
10724 HOST_WIDE_INT llen
= 0, rlen
= 0;
10725 if (lhs
->ts
.u
.cl
!= NULL
10726 && lhs
->ts
.u
.cl
->length
!= NULL
10727 && lhs
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
)
10728 llen
= gfc_mpz_get_hwi (lhs
->ts
.u
.cl
->length
->value
.integer
);
10730 if (rhs
->expr_type
== EXPR_CONSTANT
)
10731 rlen
= rhs
->value
.character
.length
;
10733 else if (rhs
->ts
.u
.cl
!= NULL
10734 && rhs
->ts
.u
.cl
->length
!= NULL
10735 && rhs
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
)
10736 rlen
= gfc_mpz_get_hwi (rhs
->ts
.u
.cl
->length
->value
.integer
);
10738 if (rlen
&& llen
&& rlen
> llen
)
10739 gfc_warning_now (OPT_Wcharacter_truncation
,
10740 "CHARACTER expression will be truncated "
10741 "in assignment (%ld/%ld) at %L",
10742 (long) llen
, (long) rlen
, &code
->loc
);
10745 /* Ensure that a vector index expression for the lvalue is evaluated
10746 to a temporary if the lvalue symbol is referenced in it. */
10749 for (ref
= lhs
->ref
; ref
; ref
= ref
->next
)
10750 if (ref
->type
== REF_ARRAY
)
10752 for (n
= 0; n
< ref
->u
.ar
.dimen
; n
++)
10753 if (ref
->u
.ar
.dimen_type
[n
] == DIMEN_VECTOR
10754 && gfc_find_sym_in_expr (lhs
->symtree
->n
.sym
,
10755 ref
->u
.ar
.start
[n
]))
10757 = gfc_get_parentheses (ref
->u
.ar
.start
[n
]);
10761 if (gfc_pure (NULL
))
10763 if (lhs
->ts
.type
== BT_DERIVED
10764 && lhs
->expr_type
== EXPR_VARIABLE
10765 && lhs
->ts
.u
.derived
->attr
.pointer_comp
10766 && rhs
->expr_type
== EXPR_VARIABLE
10767 && (gfc_impure_variable (rhs
->symtree
->n
.sym
)
10768 || gfc_is_coindexed (rhs
)))
10770 /* F2008, C1283. */
10771 if (gfc_is_coindexed (rhs
))
10772 gfc_error ("Coindexed expression at %L is assigned to "
10773 "a derived type variable with a POINTER "
10774 "component in a PURE procedure",
10777 gfc_error ("The impure variable at %L is assigned to "
10778 "a derived type variable with a POINTER "
10779 "component in a PURE procedure (12.6)",
10784 /* Fortran 2008, C1283. */
10785 if (gfc_is_coindexed (lhs
))
10787 gfc_error ("Assignment to coindexed variable at %L in a PURE "
10788 "procedure", &rhs
->where
);
10793 if (gfc_implicit_pure (NULL
))
10795 if (lhs
->expr_type
== EXPR_VARIABLE
10796 && lhs
->symtree
->n
.sym
!= gfc_current_ns
->proc_name
10797 && lhs
->symtree
->n
.sym
->ns
!= gfc_current_ns
)
10798 gfc_unset_implicit_pure (NULL
);
10800 if (lhs
->ts
.type
== BT_DERIVED
10801 && lhs
->expr_type
== EXPR_VARIABLE
10802 && lhs
->ts
.u
.derived
->attr
.pointer_comp
10803 && rhs
->expr_type
== EXPR_VARIABLE
10804 && (gfc_impure_variable (rhs
->symtree
->n
.sym
)
10805 || gfc_is_coindexed (rhs
)))
10806 gfc_unset_implicit_pure (NULL
);
10808 /* Fortran 2008, C1283. */
10809 if (gfc_is_coindexed (lhs
))
10810 gfc_unset_implicit_pure (NULL
);
10813 /* F2008, 7.2.1.2. */
10814 attr
= gfc_expr_attr (lhs
);
10815 if (lhs
->ts
.type
== BT_CLASS
&& attr
.allocatable
)
10817 if (attr
.codimension
)
10819 gfc_error ("Assignment to polymorphic coarray at %L is not "
10820 "permitted", &lhs
->where
);
10823 if (!gfc_notify_std (GFC_STD_F2008
, "Assignment to an allocatable "
10824 "polymorphic variable at %L", &lhs
->where
))
10826 if (!flag_realloc_lhs
)
10828 gfc_error ("Assignment to an allocatable polymorphic variable at %L "
10829 "requires %<-frealloc-lhs%>", &lhs
->where
);
10833 else if (lhs
->ts
.type
== BT_CLASS
)
10835 gfc_error ("Nonallocatable variable must not be polymorphic in intrinsic "
10836 "assignment at %L - check that there is a matching specific "
10837 "subroutine for '=' operator", &lhs
->where
);
10841 bool lhs_coindexed
= gfc_is_coindexed (lhs
);
10843 /* F2008, Section 7.2.1.2. */
10844 if (lhs_coindexed
&& gfc_has_ultimate_allocatable (lhs
))
10846 gfc_error ("Coindexed variable must not have an allocatable ultimate "
10847 "component in assignment at %L", &lhs
->where
);
10851 /* Assign the 'data' of a class object to a derived type. */
10852 if (lhs
->ts
.type
== BT_DERIVED
10853 && rhs
->ts
.type
== BT_CLASS
10854 && rhs
->expr_type
!= EXPR_ARRAY
)
10855 gfc_add_data_component (rhs
);
10857 /* Make sure there is a vtable and, in particular, a _copy for the
10859 if (UNLIMITED_POLY (lhs
) && lhs
->rank
&& rhs
->ts
.type
!= BT_CLASS
)
10860 gfc_find_vtab (&rhs
->ts
);
10862 bool caf_convert_to_send
= flag_coarray
== GFC_FCOARRAY_LIB
10864 || (code
->expr2
->expr_type
== EXPR_FUNCTION
10865 && code
->expr2
->value
.function
.isym
10866 && code
->expr2
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
10867 && (code
->expr1
->rank
== 0 || code
->expr2
->rank
!= 0)
10868 && !gfc_expr_attr (rhs
).allocatable
10869 && !gfc_has_vector_subscript (rhs
)));
10871 gfc_check_assign (lhs
, rhs
, 1, !caf_convert_to_send
);
10873 /* Insert a GFC_ISYM_CAF_SEND intrinsic, when the LHS is a coindexed variable.
10874 Additionally, insert this code when the RHS is a CAF as we then use the
10875 GFC_ISYM_CAF_SEND intrinsic just to avoid a temporary; but do not do so if
10876 the LHS is (re)allocatable or has a vector subscript. If the LHS is a
10877 noncoindexed array and the RHS is a coindexed scalar, use the normal code
10879 if (caf_convert_to_send
)
10881 if (code
->expr2
->expr_type
== EXPR_FUNCTION
10882 && code
->expr2
->value
.function
.isym
10883 && code
->expr2
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
)
10884 remove_caf_get_intrinsic (code
->expr2
);
10885 code
->op
= EXEC_CALL
;
10886 gfc_get_sym_tree (GFC_PREFIX ("caf_send"), ns
, &code
->symtree
, true);
10887 code
->resolved_sym
= code
->symtree
->n
.sym
;
10888 code
->resolved_sym
->attr
.flavor
= FL_PROCEDURE
;
10889 code
->resolved_sym
->attr
.intrinsic
= 1;
10890 code
->resolved_sym
->attr
.subroutine
= 1;
10891 code
->resolved_isym
= gfc_intrinsic_subroutine_by_id (GFC_ISYM_CAF_SEND
);
10892 gfc_commit_symbol (code
->resolved_sym
);
10893 code
->ext
.actual
= gfc_get_actual_arglist ();
10894 code
->ext
.actual
->expr
= lhs
;
10895 code
->ext
.actual
->next
= gfc_get_actual_arglist ();
10896 code
->ext
.actual
->next
->expr
= rhs
;
10897 code
->expr1
= NULL
;
10898 code
->expr2
= NULL
;
10905 /* Add a component reference onto an expression. */
10908 add_comp_ref (gfc_expr
*e
, gfc_component
*c
)
10913 ref
= &((*ref
)->next
);
10914 *ref
= gfc_get_ref ();
10915 (*ref
)->type
= REF_COMPONENT
;
10916 (*ref
)->u
.c
.sym
= e
->ts
.u
.derived
;
10917 (*ref
)->u
.c
.component
= c
;
10920 /* Add a full array ref, as necessary. */
10923 gfc_add_full_array_ref (e
, c
->as
);
10924 e
->rank
= c
->as
->rank
;
10929 /* Build an assignment. Keep the argument 'op' for future use, so that
10930 pointer assignments can be made. */
10933 build_assignment (gfc_exec_op op
, gfc_expr
*expr1
, gfc_expr
*expr2
,
10934 gfc_component
*comp1
, gfc_component
*comp2
, locus loc
)
10936 gfc_code
*this_code
;
10938 this_code
= gfc_get_code (op
);
10939 this_code
->next
= NULL
;
10940 this_code
->expr1
= gfc_copy_expr (expr1
);
10941 this_code
->expr2
= gfc_copy_expr (expr2
);
10942 this_code
->loc
= loc
;
10943 if (comp1
&& comp2
)
10945 add_comp_ref (this_code
->expr1
, comp1
);
10946 add_comp_ref (this_code
->expr2
, comp2
);
10953 /* Makes a temporary variable expression based on the characteristics of
10954 a given variable expression. */
10957 get_temp_from_expr (gfc_expr
*e
, gfc_namespace
*ns
)
10959 static int serial
= 0;
10960 char name
[GFC_MAX_SYMBOL_LEN
];
10962 gfc_array_spec
*as
;
10963 gfc_array_ref
*aref
;
10966 sprintf (name
, GFC_PREFIX("DA%d"), serial
++);
10967 gfc_get_sym_tree (name
, ns
, &tmp
, false);
10968 gfc_add_type (tmp
->n
.sym
, &e
->ts
, NULL
);
10970 if (e
->expr_type
== EXPR_CONSTANT
&& e
->ts
.type
== BT_CHARACTER
)
10971 tmp
->n
.sym
->ts
.u
.cl
->length
= gfc_get_int_expr (gfc_charlen_int_kind
,
10973 e
->value
.character
.length
);
10979 /* Obtain the arrayspec for the temporary. */
10980 if (e
->rank
&& e
->expr_type
!= EXPR_ARRAY
10981 && e
->expr_type
!= EXPR_FUNCTION
10982 && e
->expr_type
!= EXPR_OP
)
10984 aref
= gfc_find_array_ref (e
);
10985 if (e
->expr_type
== EXPR_VARIABLE
10986 && e
->symtree
->n
.sym
->as
== aref
->as
)
10990 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
10991 if (ref
->type
== REF_COMPONENT
10992 && ref
->u
.c
.component
->as
== aref
->as
)
11000 /* Add the attributes and the arrayspec to the temporary. */
11001 tmp
->n
.sym
->attr
= gfc_expr_attr (e
);
11002 tmp
->n
.sym
->attr
.function
= 0;
11003 tmp
->n
.sym
->attr
.result
= 0;
11004 tmp
->n
.sym
->attr
.flavor
= FL_VARIABLE
;
11005 tmp
->n
.sym
->attr
.dummy
= 0;
11006 tmp
->n
.sym
->attr
.intent
= INTENT_UNKNOWN
;
11010 tmp
->n
.sym
->as
= gfc_copy_array_spec (as
);
11013 if (as
->type
== AS_DEFERRED
)
11014 tmp
->n
.sym
->attr
.allocatable
= 1;
11016 else if (e
->rank
&& (e
->expr_type
== EXPR_ARRAY
11017 || e
->expr_type
== EXPR_FUNCTION
11018 || e
->expr_type
== EXPR_OP
))
11020 tmp
->n
.sym
->as
= gfc_get_array_spec ();
11021 tmp
->n
.sym
->as
->type
= AS_DEFERRED
;
11022 tmp
->n
.sym
->as
->rank
= e
->rank
;
11023 tmp
->n
.sym
->attr
.allocatable
= 1;
11024 tmp
->n
.sym
->attr
.dimension
= 1;
11027 tmp
->n
.sym
->attr
.dimension
= 0;
11029 gfc_set_sym_referenced (tmp
->n
.sym
);
11030 gfc_commit_symbol (tmp
->n
.sym
);
11031 e
= gfc_lval_expr_from_sym (tmp
->n
.sym
);
11033 /* Should the lhs be a section, use its array ref for the
11034 temporary expression. */
11035 if (aref
&& aref
->type
!= AR_FULL
)
11037 gfc_free_ref_list (e
->ref
);
11038 e
->ref
= gfc_copy_ref (ref
);
11044 /* Add one line of code to the code chain, making sure that 'head' and
11045 'tail' are appropriately updated. */
11048 add_code_to_chain (gfc_code
**this_code
, gfc_code
**head
, gfc_code
**tail
)
11050 gcc_assert (this_code
);
11052 *head
= *tail
= *this_code
;
11054 *tail
= gfc_append_code (*tail
, *this_code
);
11059 /* Counts the potential number of part array references that would
11060 result from resolution of typebound defined assignments. */
11063 nonscalar_typebound_assign (gfc_symbol
*derived
, int depth
)
11066 int c_depth
= 0, t_depth
;
11068 for (c
= derived
->components
; c
; c
= c
->next
)
11070 if ((!gfc_bt_struct (c
->ts
.type
)
11072 || c
->attr
.allocatable
11073 || c
->attr
.proc_pointer_comp
11074 || c
->attr
.class_pointer
11075 || c
->attr
.proc_pointer
)
11076 && !c
->attr
.defined_assign_comp
)
11079 if (c
->as
&& c_depth
== 0)
11082 if (c
->ts
.u
.derived
->attr
.defined_assign_comp
)
11083 t_depth
= nonscalar_typebound_assign (c
->ts
.u
.derived
,
11088 c_depth
= t_depth
> c_depth
? t_depth
: c_depth
;
11090 return depth
+ c_depth
;
11094 /* Implement 7.2.1.3 of the F08 standard:
11095 "An intrinsic assignment where the variable is of derived type is
11096 performed as if each component of the variable were assigned from the
11097 corresponding component of expr using pointer assignment (7.2.2) for
11098 each pointer component, defined assignment for each nonpointer
11099 nonallocatable component of a type that has a type-bound defined
11100 assignment consistent with the component, intrinsic assignment for
11101 each other nonpointer nonallocatable component, ..."
11103 The pointer assignments are taken care of by the intrinsic
11104 assignment of the structure itself. This function recursively adds
11105 defined assignments where required. The recursion is accomplished
11106 by calling gfc_resolve_code.
11108 When the lhs in a defined assignment has intent INOUT, we need a
11109 temporary for the lhs. In pseudo-code:
11111 ! Only call function lhs once.
11112 if (lhs is not a constant or an variable)
11115 ! Do the intrinsic assignment
11117 ! Now do the defined assignments
11118 do over components with typebound defined assignment [%cmp]
11119 #if one component's assignment procedure is INOUT
11121 #if expr2 non-variable
11127 t1%cmp {defined=} expr2%cmp
11133 expr1%cmp {defined=} expr2%cmp
11137 /* The temporary assignments have to be put on top of the additional
11138 code to avoid the result being changed by the intrinsic assignment.
11140 static int component_assignment_level
= 0;
11141 static gfc_code
*tmp_head
= NULL
, *tmp_tail
= NULL
;
11144 generate_component_assignments (gfc_code
**code
, gfc_namespace
*ns
)
11146 gfc_component
*comp1
, *comp2
;
11147 gfc_code
*this_code
= NULL
, *head
= NULL
, *tail
= NULL
;
11149 int error_count
, depth
;
11151 gfc_get_errors (NULL
, &error_count
);
11153 /* Filter out continuing processing after an error. */
11155 || (*code
)->expr1
->ts
.type
!= BT_DERIVED
11156 || (*code
)->expr2
->ts
.type
!= BT_DERIVED
)
11159 /* TODO: Handle more than one part array reference in assignments. */
11160 depth
= nonscalar_typebound_assign ((*code
)->expr1
->ts
.u
.derived
,
11161 (*code
)->expr1
->rank
? 1 : 0);
11164 gfc_warning (0, "TODO: type-bound defined assignment(s) at %L not "
11165 "done because multiple part array references would "
11166 "occur in intermediate expressions.", &(*code
)->loc
);
11170 component_assignment_level
++;
11172 /* Create a temporary so that functions get called only once. */
11173 if ((*code
)->expr2
->expr_type
!= EXPR_VARIABLE
11174 && (*code
)->expr2
->expr_type
!= EXPR_CONSTANT
)
11176 gfc_expr
*tmp_expr
;
11178 /* Assign the rhs to the temporary. */
11179 tmp_expr
= get_temp_from_expr ((*code
)->expr1
, ns
);
11180 this_code
= build_assignment (EXEC_ASSIGN
,
11181 tmp_expr
, (*code
)->expr2
,
11182 NULL
, NULL
, (*code
)->loc
);
11183 /* Add the code and substitute the rhs expression. */
11184 add_code_to_chain (&this_code
, &tmp_head
, &tmp_tail
);
11185 gfc_free_expr ((*code
)->expr2
);
11186 (*code
)->expr2
= tmp_expr
;
11189 /* Do the intrinsic assignment. This is not needed if the lhs is one
11190 of the temporaries generated here, since the intrinsic assignment
11191 to the final result already does this. */
11192 if ((*code
)->expr1
->symtree
->n
.sym
->name
[2] != '@')
11194 this_code
= build_assignment (EXEC_ASSIGN
,
11195 (*code
)->expr1
, (*code
)->expr2
,
11196 NULL
, NULL
, (*code
)->loc
);
11197 add_code_to_chain (&this_code
, &head
, &tail
);
11200 comp1
= (*code
)->expr1
->ts
.u
.derived
->components
;
11201 comp2
= (*code
)->expr2
->ts
.u
.derived
->components
;
11204 for (; comp1
; comp1
= comp1
->next
, comp2
= comp2
->next
)
11206 bool inout
= false;
11208 /* The intrinsic assignment does the right thing for pointers
11209 of all kinds and allocatable components. */
11210 if (!gfc_bt_struct (comp1
->ts
.type
)
11211 || comp1
->attr
.pointer
11212 || comp1
->attr
.allocatable
11213 || comp1
->attr
.proc_pointer_comp
11214 || comp1
->attr
.class_pointer
11215 || comp1
->attr
.proc_pointer
)
11218 /* Make an assigment for this component. */
11219 this_code
= build_assignment (EXEC_ASSIGN
,
11220 (*code
)->expr1
, (*code
)->expr2
,
11221 comp1
, comp2
, (*code
)->loc
);
11223 /* Convert the assignment if there is a defined assignment for
11224 this type. Otherwise, using the call from gfc_resolve_code,
11225 recurse into its components. */
11226 gfc_resolve_code (this_code
, ns
);
11228 if (this_code
->op
== EXEC_ASSIGN_CALL
)
11230 gfc_formal_arglist
*dummy_args
;
11232 /* Check that there is a typebound defined assignment. If not,
11233 then this must be a module defined assignment. We cannot
11234 use the defined_assign_comp attribute here because it must
11235 be this derived type that has the defined assignment and not
11237 if (!(comp1
->ts
.u
.derived
->f2k_derived
11238 && comp1
->ts
.u
.derived
->f2k_derived
11239 ->tb_op
[INTRINSIC_ASSIGN
]))
11241 gfc_free_statements (this_code
);
11246 /* If the first argument of the subroutine has intent INOUT
11247 a temporary must be generated and used instead. */
11248 rsym
= this_code
->resolved_sym
;
11249 dummy_args
= gfc_sym_get_dummy_args (rsym
);
11251 && dummy_args
->sym
->attr
.intent
== INTENT_INOUT
)
11253 gfc_code
*temp_code
;
11256 /* Build the temporary required for the assignment and put
11257 it at the head of the generated code. */
11260 t1
= get_temp_from_expr ((*code
)->expr1
, ns
);
11261 temp_code
= build_assignment (EXEC_ASSIGN
,
11262 t1
, (*code
)->expr1
,
11263 NULL
, NULL
, (*code
)->loc
);
11265 /* For allocatable LHS, check whether it is allocated. Note
11266 that allocatable components with defined assignment are
11267 not yet support. See PR 57696. */
11268 if ((*code
)->expr1
->symtree
->n
.sym
->attr
.allocatable
)
11272 gfc_lval_expr_from_sym ((*code
)->expr1
->symtree
->n
.sym
);
11273 block
= gfc_get_code (EXEC_IF
);
11274 block
->block
= gfc_get_code (EXEC_IF
);
11275 block
->block
->expr1
11276 = gfc_build_intrinsic_call (ns
,
11277 GFC_ISYM_ALLOCATED
, "allocated",
11278 (*code
)->loc
, 1, e
);
11279 block
->block
->next
= temp_code
;
11282 add_code_to_chain (&temp_code
, &tmp_head
, &tmp_tail
);
11285 /* Replace the first actual arg with the component of the
11287 gfc_free_expr (this_code
->ext
.actual
->expr
);
11288 this_code
->ext
.actual
->expr
= gfc_copy_expr (t1
);
11289 add_comp_ref (this_code
->ext
.actual
->expr
, comp1
);
11291 /* If the LHS variable is allocatable and wasn't allocated and
11292 the temporary is allocatable, pointer assign the address of
11293 the freshly allocated LHS to the temporary. */
11294 if ((*code
)->expr1
->symtree
->n
.sym
->attr
.allocatable
11295 && gfc_expr_attr ((*code
)->expr1
).allocatable
)
11300 cond
= gfc_get_expr ();
11301 cond
->ts
.type
= BT_LOGICAL
;
11302 cond
->ts
.kind
= gfc_default_logical_kind
;
11303 cond
->expr_type
= EXPR_OP
;
11304 cond
->where
= (*code
)->loc
;
11305 cond
->value
.op
.op
= INTRINSIC_NOT
;
11306 cond
->value
.op
.op1
= gfc_build_intrinsic_call (ns
,
11307 GFC_ISYM_ALLOCATED
, "allocated",
11308 (*code
)->loc
, 1, gfc_copy_expr (t1
));
11309 block
= gfc_get_code (EXEC_IF
);
11310 block
->block
= gfc_get_code (EXEC_IF
);
11311 block
->block
->expr1
= cond
;
11312 block
->block
->next
= build_assignment (EXEC_POINTER_ASSIGN
,
11313 t1
, (*code
)->expr1
,
11314 NULL
, NULL
, (*code
)->loc
);
11315 add_code_to_chain (&block
, &head
, &tail
);
11319 else if (this_code
->op
== EXEC_ASSIGN
&& !this_code
->next
)
11321 /* Don't add intrinsic assignments since they are already
11322 effected by the intrinsic assignment of the structure. */
11323 gfc_free_statements (this_code
);
11328 add_code_to_chain (&this_code
, &head
, &tail
);
11332 /* Transfer the value to the final result. */
11333 this_code
= build_assignment (EXEC_ASSIGN
,
11334 (*code
)->expr1
, t1
,
11335 comp1
, comp2
, (*code
)->loc
);
11336 add_code_to_chain (&this_code
, &head
, &tail
);
11340 /* Put the temporary assignments at the top of the generated code. */
11341 if (tmp_head
&& component_assignment_level
== 1)
11343 gfc_append_code (tmp_head
, head
);
11345 tmp_head
= tmp_tail
= NULL
;
11348 // If we did a pointer assignment - thus, we need to ensure that the LHS is
11349 // not accidentally deallocated. Hence, nullify t1.
11350 if (t1
&& (*code
)->expr1
->symtree
->n
.sym
->attr
.allocatable
11351 && gfc_expr_attr ((*code
)->expr1
).allocatable
)
11357 e
= gfc_lval_expr_from_sym ((*code
)->expr1
->symtree
->n
.sym
);
11358 cond
= gfc_build_intrinsic_call (ns
, GFC_ISYM_ASSOCIATED
, "associated",
11359 (*code
)->loc
, 2, gfc_copy_expr (t1
), e
);
11360 block
= gfc_get_code (EXEC_IF
);
11361 block
->block
= gfc_get_code (EXEC_IF
);
11362 block
->block
->expr1
= cond
;
11363 block
->block
->next
= build_assignment (EXEC_POINTER_ASSIGN
,
11364 t1
, gfc_get_null_expr (&(*code
)->loc
),
11365 NULL
, NULL
, (*code
)->loc
);
11366 gfc_append_code (tail
, block
);
11370 /* Now attach the remaining code chain to the input code. Step on
11371 to the end of the new code since resolution is complete. */
11372 gcc_assert ((*code
)->op
== EXEC_ASSIGN
);
11373 tail
->next
= (*code
)->next
;
11374 /* Overwrite 'code' because this would place the intrinsic assignment
11375 before the temporary for the lhs is created. */
11376 gfc_free_expr ((*code
)->expr1
);
11377 gfc_free_expr ((*code
)->expr2
);
11383 component_assignment_level
--;
11387 /* F2008: Pointer function assignments are of the form:
11388 ptr_fcn (args) = expr
11389 This function breaks these assignments into two statements:
11390 temporary_pointer => ptr_fcn(args)
11391 temporary_pointer = expr */
11394 resolve_ptr_fcn_assign (gfc_code
**code
, gfc_namespace
*ns
)
11396 gfc_expr
*tmp_ptr_expr
;
11397 gfc_code
*this_code
;
11398 gfc_component
*comp
;
11401 if ((*code
)->expr1
->expr_type
!= EXPR_FUNCTION
)
11404 /* Even if standard does not support this feature, continue to build
11405 the two statements to avoid upsetting frontend_passes.c. */
11406 gfc_notify_std (GFC_STD_F2008
, "Pointer procedure assignment at "
11407 "%L", &(*code
)->loc
);
11409 comp
= gfc_get_proc_ptr_comp ((*code
)->expr1
);
11412 s
= comp
->ts
.interface
;
11414 s
= (*code
)->expr1
->symtree
->n
.sym
;
11416 if (s
== NULL
|| !s
->result
->attr
.pointer
)
11418 gfc_error ("The function result on the lhs of the assignment at "
11419 "%L must have the pointer attribute.",
11420 &(*code
)->expr1
->where
);
11421 (*code
)->op
= EXEC_NOP
;
11425 tmp_ptr_expr
= get_temp_from_expr ((*code
)->expr2
, ns
);
11427 /* get_temp_from_expression is set up for ordinary assignments. To that
11428 end, where array bounds are not known, arrays are made allocatable.
11429 Change the temporary to a pointer here. */
11430 tmp_ptr_expr
->symtree
->n
.sym
->attr
.pointer
= 1;
11431 tmp_ptr_expr
->symtree
->n
.sym
->attr
.allocatable
= 0;
11432 tmp_ptr_expr
->where
= (*code
)->loc
;
11434 this_code
= build_assignment (EXEC_ASSIGN
,
11435 tmp_ptr_expr
, (*code
)->expr2
,
11436 NULL
, NULL
, (*code
)->loc
);
11437 this_code
->next
= (*code
)->next
;
11438 (*code
)->next
= this_code
;
11439 (*code
)->op
= EXEC_POINTER_ASSIGN
;
11440 (*code
)->expr2
= (*code
)->expr1
;
11441 (*code
)->expr1
= tmp_ptr_expr
;
11447 /* Deferred character length assignments from an operator expression
11448 require a temporary because the character length of the lhs can
11449 change in the course of the assignment. */
11452 deferred_op_assign (gfc_code
**code
, gfc_namespace
*ns
)
11454 gfc_expr
*tmp_expr
;
11455 gfc_code
*this_code
;
11457 if (!((*code
)->expr1
->ts
.type
== BT_CHARACTER
11458 && (*code
)->expr1
->ts
.deferred
&& (*code
)->expr1
->rank
11459 && (*code
)->expr2
->expr_type
== EXPR_OP
))
11462 if (!gfc_check_dependency ((*code
)->expr1
, (*code
)->expr2
, 1))
11465 if (gfc_expr_attr ((*code
)->expr1
).pointer
)
11468 tmp_expr
= get_temp_from_expr ((*code
)->expr1
, ns
);
11469 tmp_expr
->where
= (*code
)->loc
;
11471 /* A new charlen is required to ensure that the variable string
11472 length is different to that of the original lhs. */
11473 tmp_expr
->ts
.u
.cl
= gfc_get_charlen();
11474 tmp_expr
->symtree
->n
.sym
->ts
.u
.cl
= tmp_expr
->ts
.u
.cl
;
11475 tmp_expr
->ts
.u
.cl
->next
= (*code
)->expr2
->ts
.u
.cl
->next
;
11476 (*code
)->expr2
->ts
.u
.cl
->next
= tmp_expr
->ts
.u
.cl
;
11478 tmp_expr
->symtree
->n
.sym
->ts
.deferred
= 1;
11480 this_code
= build_assignment (EXEC_ASSIGN
,
11482 gfc_copy_expr (tmp_expr
),
11483 NULL
, NULL
, (*code
)->loc
);
11485 (*code
)->expr1
= tmp_expr
;
11487 this_code
->next
= (*code
)->next
;
11488 (*code
)->next
= this_code
;
11494 /* Given a block of code, recursively resolve everything pointed to by this
11498 gfc_resolve_code (gfc_code
*code
, gfc_namespace
*ns
)
11500 int omp_workshare_save
;
11501 int forall_save
, do_concurrent_save
;
11505 frame
.prev
= cs_base
;
11509 find_reachable_labels (code
);
11511 for (; code
; code
= code
->next
)
11513 frame
.current
= code
;
11514 forall_save
= forall_flag
;
11515 do_concurrent_save
= gfc_do_concurrent_flag
;
11517 if (code
->op
== EXEC_FORALL
)
11520 gfc_resolve_forall (code
, ns
, forall_save
);
11523 else if (code
->block
)
11525 omp_workshare_save
= -1;
11528 case EXEC_OACC_PARALLEL_LOOP
:
11529 case EXEC_OACC_PARALLEL
:
11530 case EXEC_OACC_KERNELS_LOOP
:
11531 case EXEC_OACC_KERNELS
:
11532 case EXEC_OACC_DATA
:
11533 case EXEC_OACC_HOST_DATA
:
11534 case EXEC_OACC_LOOP
:
11535 gfc_resolve_oacc_blocks (code
, ns
);
11537 case EXEC_OMP_PARALLEL_WORKSHARE
:
11538 omp_workshare_save
= omp_workshare_flag
;
11539 omp_workshare_flag
= 1;
11540 gfc_resolve_omp_parallel_blocks (code
, ns
);
11542 case EXEC_OMP_PARALLEL
:
11543 case EXEC_OMP_PARALLEL_DO
:
11544 case EXEC_OMP_PARALLEL_DO_SIMD
:
11545 case EXEC_OMP_PARALLEL_SECTIONS
:
11546 case EXEC_OMP_TARGET_PARALLEL
:
11547 case EXEC_OMP_TARGET_PARALLEL_DO
:
11548 case EXEC_OMP_TARGET_PARALLEL_DO_SIMD
:
11549 case EXEC_OMP_TARGET_TEAMS
:
11550 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE
:
11551 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO
:
11552 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
11553 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_SIMD
:
11554 case EXEC_OMP_TASK
:
11555 case EXEC_OMP_TASKLOOP
:
11556 case EXEC_OMP_TASKLOOP_SIMD
:
11557 case EXEC_OMP_TEAMS
:
11558 case EXEC_OMP_TEAMS_DISTRIBUTE
:
11559 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO
:
11560 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
11561 case EXEC_OMP_TEAMS_DISTRIBUTE_SIMD
:
11562 omp_workshare_save
= omp_workshare_flag
;
11563 omp_workshare_flag
= 0;
11564 gfc_resolve_omp_parallel_blocks (code
, ns
);
11566 case EXEC_OMP_DISTRIBUTE
:
11567 case EXEC_OMP_DISTRIBUTE_SIMD
:
11569 case EXEC_OMP_DO_SIMD
:
11570 case EXEC_OMP_SIMD
:
11571 case EXEC_OMP_TARGET_SIMD
:
11572 gfc_resolve_omp_do_blocks (code
, ns
);
11574 case EXEC_SELECT_TYPE
:
11575 /* Blocks are handled in resolve_select_type because we have
11576 to transform the SELECT TYPE into ASSOCIATE first. */
11578 case EXEC_DO_CONCURRENT
:
11579 gfc_do_concurrent_flag
= 1;
11580 gfc_resolve_blocks (code
->block
, ns
);
11581 gfc_do_concurrent_flag
= 2;
11583 case EXEC_OMP_WORKSHARE
:
11584 omp_workshare_save
= omp_workshare_flag
;
11585 omp_workshare_flag
= 1;
11588 gfc_resolve_blocks (code
->block
, ns
);
11592 if (omp_workshare_save
!= -1)
11593 omp_workshare_flag
= omp_workshare_save
;
11597 if (code
->op
!= EXEC_COMPCALL
&& code
->op
!= EXEC_CALL_PPC
)
11598 t
= gfc_resolve_expr (code
->expr1
);
11599 forall_flag
= forall_save
;
11600 gfc_do_concurrent_flag
= do_concurrent_save
;
11602 if (!gfc_resolve_expr (code
->expr2
))
11605 if (code
->op
== EXEC_ALLOCATE
11606 && !gfc_resolve_expr (code
->expr3
))
11612 case EXEC_END_BLOCK
:
11613 case EXEC_END_NESTED_BLOCK
:
11617 case EXEC_ERROR_STOP
:
11619 case EXEC_CONTINUE
:
11621 case EXEC_ASSIGN_CALL
:
11624 case EXEC_CRITICAL
:
11625 resolve_critical (code
);
11628 case EXEC_SYNC_ALL
:
11629 case EXEC_SYNC_IMAGES
:
11630 case EXEC_SYNC_MEMORY
:
11631 resolve_sync (code
);
11636 case EXEC_EVENT_POST
:
11637 case EXEC_EVENT_WAIT
:
11638 resolve_lock_unlock_event (code
);
11641 case EXEC_FAIL_IMAGE
:
11642 case EXEC_FORM_TEAM
:
11643 case EXEC_CHANGE_TEAM
:
11644 case EXEC_END_TEAM
:
11645 case EXEC_SYNC_TEAM
:
11649 /* Keep track of which entry we are up to. */
11650 current_entry_id
= code
->ext
.entry
->id
;
11654 resolve_where (code
, NULL
);
11658 if (code
->expr1
!= NULL
)
11660 if (code
->expr1
->ts
.type
!= BT_INTEGER
)
11661 gfc_error ("ASSIGNED GOTO statement at %L requires an "
11662 "INTEGER variable", &code
->expr1
->where
);
11663 else if (code
->expr1
->symtree
->n
.sym
->attr
.assign
!= 1)
11664 gfc_error ("Variable %qs has not been assigned a target "
11665 "label at %L", code
->expr1
->symtree
->n
.sym
->name
,
11666 &code
->expr1
->where
);
11669 resolve_branch (code
->label1
, code
);
11673 if (code
->expr1
!= NULL
11674 && (code
->expr1
->ts
.type
!= BT_INTEGER
|| code
->expr1
->rank
))
11675 gfc_error ("Alternate RETURN statement at %L requires a SCALAR-"
11676 "INTEGER return specifier", &code
->expr1
->where
);
11679 case EXEC_INIT_ASSIGN
:
11680 case EXEC_END_PROCEDURE
:
11687 /* Remove a GFC_ISYM_CAF_GET inserted for a coindexed variable on
11689 if (code
->expr1
->expr_type
== EXPR_FUNCTION
11690 && code
->expr1
->value
.function
.isym
11691 && code
->expr1
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
)
11692 remove_caf_get_intrinsic (code
->expr1
);
11694 /* If this is a pointer function in an lvalue variable context,
11695 the new code will have to be resolved afresh. This is also the
11696 case with an error, where the code is transformed into NOP to
11697 prevent ICEs downstream. */
11698 if (resolve_ptr_fcn_assign (&code
, ns
)
11699 || code
->op
== EXEC_NOP
)
11702 if (!gfc_check_vardef_context (code
->expr1
, false, false, false,
11706 if (resolve_ordinary_assign (code
, ns
))
11708 if (code
->op
== EXEC_COMPCALL
)
11714 /* Check for dependencies in deferred character length array
11715 assignments and generate a temporary, if necessary. */
11716 if (code
->op
== EXEC_ASSIGN
&& deferred_op_assign (&code
, ns
))
11719 /* F03 7.4.1.3 for non-allocatable, non-pointer components. */
11720 if (code
->op
!= EXEC_CALL
&& code
->expr1
->ts
.type
== BT_DERIVED
11721 && code
->expr1
->ts
.u
.derived
11722 && code
->expr1
->ts
.u
.derived
->attr
.defined_assign_comp
)
11723 generate_component_assignments (&code
, ns
);
11727 case EXEC_LABEL_ASSIGN
:
11728 if (code
->label1
->defined
== ST_LABEL_UNKNOWN
)
11729 gfc_error ("Label %d referenced at %L is never defined",
11730 code
->label1
->value
, &code
->label1
->where
);
11732 && (code
->expr1
->expr_type
!= EXPR_VARIABLE
11733 || code
->expr1
->symtree
->n
.sym
->ts
.type
!= BT_INTEGER
11734 || code
->expr1
->symtree
->n
.sym
->ts
.kind
11735 != gfc_default_integer_kind
11736 || code
->expr1
->symtree
->n
.sym
->as
!= NULL
))
11737 gfc_error ("ASSIGN statement at %L requires a scalar "
11738 "default INTEGER variable", &code
->expr1
->where
);
11741 case EXEC_POINTER_ASSIGN
:
11748 /* This is both a variable definition and pointer assignment
11749 context, so check both of them. For rank remapping, a final
11750 array ref may be present on the LHS and fool gfc_expr_attr
11751 used in gfc_check_vardef_context. Remove it. */
11752 e
= remove_last_array_ref (code
->expr1
);
11753 t
= gfc_check_vardef_context (e
, true, false, false,
11754 _("pointer assignment"));
11756 t
= gfc_check_vardef_context (e
, false, false, false,
11757 _("pointer assignment"));
11760 t
= gfc_check_pointer_assign (code
->expr1
, code
->expr2
, !t
) && t
;
11765 /* Assigning a class object always is a regular assign. */
11766 if (code
->expr2
->ts
.type
== BT_CLASS
11767 && code
->expr1
->ts
.type
== BT_CLASS
11768 && !CLASS_DATA (code
->expr2
)->attr
.dimension
11769 && !(gfc_expr_attr (code
->expr1
).proc_pointer
11770 && code
->expr2
->expr_type
== EXPR_VARIABLE
11771 && code
->expr2
->symtree
->n
.sym
->attr
.flavor
11773 code
->op
= EXEC_ASSIGN
;
11777 case EXEC_ARITHMETIC_IF
:
11779 gfc_expr
*e
= code
->expr1
;
11781 gfc_resolve_expr (e
);
11782 if (e
->expr_type
== EXPR_NULL
)
11783 gfc_error ("Invalid NULL at %L", &e
->where
);
11785 if (t
&& (e
->rank
> 0
11786 || !(e
->ts
.type
== BT_REAL
|| e
->ts
.type
== BT_INTEGER
)))
11787 gfc_error ("Arithmetic IF statement at %L requires a scalar "
11788 "REAL or INTEGER expression", &e
->where
);
11790 resolve_branch (code
->label1
, code
);
11791 resolve_branch (code
->label2
, code
);
11792 resolve_branch (code
->label3
, code
);
11797 if (t
&& code
->expr1
!= NULL
11798 && (code
->expr1
->ts
.type
!= BT_LOGICAL
11799 || code
->expr1
->rank
!= 0))
11800 gfc_error ("IF clause at %L requires a scalar LOGICAL expression",
11801 &code
->expr1
->where
);
11806 resolve_call (code
);
11809 case EXEC_COMPCALL
:
11811 resolve_typebound_subroutine (code
);
11814 case EXEC_CALL_PPC
:
11815 resolve_ppc_call (code
);
11819 /* Select is complicated. Also, a SELECT construct could be
11820 a transformed computed GOTO. */
11821 resolve_select (code
, false);
11824 case EXEC_SELECT_TYPE
:
11825 resolve_select_type (code
, ns
);
11828 case EXEC_SELECT_RANK
:
11829 resolve_select_rank (code
, ns
);
11833 resolve_block_construct (code
);
11837 if (code
->ext
.iterator
!= NULL
)
11839 gfc_iterator
*iter
= code
->ext
.iterator
;
11840 if (gfc_resolve_iterator (iter
, true, false))
11841 gfc_resolve_do_iterator (code
, iter
->var
->symtree
->n
.sym
,
11846 case EXEC_DO_WHILE
:
11847 if (code
->expr1
== NULL
)
11848 gfc_internal_error ("gfc_resolve_code(): No expression on "
11851 && (code
->expr1
->rank
!= 0
11852 || code
->expr1
->ts
.type
!= BT_LOGICAL
))
11853 gfc_error ("Exit condition of DO WHILE loop at %L must be "
11854 "a scalar LOGICAL expression", &code
->expr1
->where
);
11857 case EXEC_ALLOCATE
:
11859 resolve_allocate_deallocate (code
, "ALLOCATE");
11863 case EXEC_DEALLOCATE
:
11865 resolve_allocate_deallocate (code
, "DEALLOCATE");
11870 if (!gfc_resolve_open (code
->ext
.open
))
11873 resolve_branch (code
->ext
.open
->err
, code
);
11877 if (!gfc_resolve_close (code
->ext
.close
))
11880 resolve_branch (code
->ext
.close
->err
, code
);
11883 case EXEC_BACKSPACE
:
11887 if (!gfc_resolve_filepos (code
->ext
.filepos
, &code
->loc
))
11890 resolve_branch (code
->ext
.filepos
->err
, code
);
11894 if (!gfc_resolve_inquire (code
->ext
.inquire
))
11897 resolve_branch (code
->ext
.inquire
->err
, code
);
11900 case EXEC_IOLENGTH
:
11901 gcc_assert (code
->ext
.inquire
!= NULL
);
11902 if (!gfc_resolve_inquire (code
->ext
.inquire
))
11905 resolve_branch (code
->ext
.inquire
->err
, code
);
11909 if (!gfc_resolve_wait (code
->ext
.wait
))
11912 resolve_branch (code
->ext
.wait
->err
, code
);
11913 resolve_branch (code
->ext
.wait
->end
, code
);
11914 resolve_branch (code
->ext
.wait
->eor
, code
);
11919 if (!gfc_resolve_dt (code
->ext
.dt
, &code
->loc
))
11922 resolve_branch (code
->ext
.dt
->err
, code
);
11923 resolve_branch (code
->ext
.dt
->end
, code
);
11924 resolve_branch (code
->ext
.dt
->eor
, code
);
11927 case EXEC_TRANSFER
:
11928 resolve_transfer (code
);
11931 case EXEC_DO_CONCURRENT
:
11933 resolve_forall_iterators (code
->ext
.forall_iterator
);
11935 if (code
->expr1
!= NULL
11936 && (code
->expr1
->ts
.type
!= BT_LOGICAL
|| code
->expr1
->rank
))
11937 gfc_error ("FORALL mask clause at %L requires a scalar LOGICAL "
11938 "expression", &code
->expr1
->where
);
11941 case EXEC_OACC_PARALLEL_LOOP
:
11942 case EXEC_OACC_PARALLEL
:
11943 case EXEC_OACC_KERNELS_LOOP
:
11944 case EXEC_OACC_KERNELS
:
11945 case EXEC_OACC_DATA
:
11946 case EXEC_OACC_HOST_DATA
:
11947 case EXEC_OACC_LOOP
:
11948 case EXEC_OACC_UPDATE
:
11949 case EXEC_OACC_WAIT
:
11950 case EXEC_OACC_CACHE
:
11951 case EXEC_OACC_ENTER_DATA
:
11952 case EXEC_OACC_EXIT_DATA
:
11953 case EXEC_OACC_ATOMIC
:
11954 case EXEC_OACC_DECLARE
:
11955 gfc_resolve_oacc_directive (code
, ns
);
11958 case EXEC_OMP_ATOMIC
:
11959 case EXEC_OMP_BARRIER
:
11960 case EXEC_OMP_CANCEL
:
11961 case EXEC_OMP_CANCELLATION_POINT
:
11962 case EXEC_OMP_CRITICAL
:
11963 case EXEC_OMP_FLUSH
:
11964 case EXEC_OMP_DISTRIBUTE
:
11965 case EXEC_OMP_DISTRIBUTE_PARALLEL_DO
:
11966 case EXEC_OMP_DISTRIBUTE_PARALLEL_DO_SIMD
:
11967 case EXEC_OMP_DISTRIBUTE_SIMD
:
11969 case EXEC_OMP_DO_SIMD
:
11970 case EXEC_OMP_MASTER
:
11971 case EXEC_OMP_ORDERED
:
11972 case EXEC_OMP_SECTIONS
:
11973 case EXEC_OMP_SIMD
:
11974 case EXEC_OMP_SINGLE
:
11975 case EXEC_OMP_TARGET
:
11976 case EXEC_OMP_TARGET_DATA
:
11977 case EXEC_OMP_TARGET_ENTER_DATA
:
11978 case EXEC_OMP_TARGET_EXIT_DATA
:
11979 case EXEC_OMP_TARGET_PARALLEL
:
11980 case EXEC_OMP_TARGET_PARALLEL_DO
:
11981 case EXEC_OMP_TARGET_PARALLEL_DO_SIMD
:
11982 case EXEC_OMP_TARGET_SIMD
:
11983 case EXEC_OMP_TARGET_TEAMS
:
11984 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE
:
11985 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO
:
11986 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
11987 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_SIMD
:
11988 case EXEC_OMP_TARGET_UPDATE
:
11989 case EXEC_OMP_TASK
:
11990 case EXEC_OMP_TASKGROUP
:
11991 case EXEC_OMP_TASKLOOP
:
11992 case EXEC_OMP_TASKLOOP_SIMD
:
11993 case EXEC_OMP_TASKWAIT
:
11994 case EXEC_OMP_TASKYIELD
:
11995 case EXEC_OMP_TEAMS
:
11996 case EXEC_OMP_TEAMS_DISTRIBUTE
:
11997 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO
:
11998 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
11999 case EXEC_OMP_TEAMS_DISTRIBUTE_SIMD
:
12000 case EXEC_OMP_WORKSHARE
:
12001 gfc_resolve_omp_directive (code
, ns
);
12004 case EXEC_OMP_PARALLEL
:
12005 case EXEC_OMP_PARALLEL_DO
:
12006 case EXEC_OMP_PARALLEL_DO_SIMD
:
12007 case EXEC_OMP_PARALLEL_SECTIONS
:
12008 case EXEC_OMP_PARALLEL_WORKSHARE
:
12009 omp_workshare_save
= omp_workshare_flag
;
12010 omp_workshare_flag
= 0;
12011 gfc_resolve_omp_directive (code
, ns
);
12012 omp_workshare_flag
= omp_workshare_save
;
12016 gfc_internal_error ("gfc_resolve_code(): Bad statement code");
12020 cs_base
= frame
.prev
;
12024 /* Resolve initial values and make sure they are compatible with
12028 resolve_values (gfc_symbol
*sym
)
12032 if (sym
->value
== NULL
)
12035 if (sym
->value
->expr_type
== EXPR_STRUCTURE
)
12036 t
= resolve_structure_cons (sym
->value
, 1);
12038 t
= gfc_resolve_expr (sym
->value
);
12043 gfc_check_assign_symbol (sym
, NULL
, sym
->value
);
12047 /* Verify any BIND(C) derived types in the namespace so we can report errors
12048 for them once, rather than for each variable declared of that type. */
12051 resolve_bind_c_derived_types (gfc_symbol
*derived_sym
)
12053 if (derived_sym
!= NULL
&& derived_sym
->attr
.flavor
== FL_DERIVED
12054 && derived_sym
->attr
.is_bind_c
== 1)
12055 verify_bind_c_derived_type (derived_sym
);
12061 /* Check the interfaces of DTIO procedures associated with derived
12062 type 'sym'. These procedures can either have typebound bindings or
12063 can appear in DTIO generic interfaces. */
12066 gfc_verify_DTIO_procedures (gfc_symbol
*sym
)
12068 if (!sym
|| sym
->attr
.flavor
!= FL_DERIVED
)
12071 gfc_check_dtio_interfaces (sym
);
12076 /* Verify that any binding labels used in a given namespace do not collide
12077 with the names or binding labels of any global symbols. Multiple INTERFACE
12078 for the same procedure are permitted. */
12081 gfc_verify_binding_labels (gfc_symbol
*sym
)
12084 const char *module
;
12086 if (!sym
|| !sym
->attr
.is_bind_c
|| sym
->attr
.is_iso_c
12087 || sym
->attr
.flavor
== FL_DERIVED
|| !sym
->binding_label
)
12090 gsym
= gfc_find_case_gsymbol (gfc_gsym_root
, sym
->binding_label
);
12093 module
= sym
->module
;
12094 else if (sym
->ns
&& sym
->ns
->proc_name
12095 && sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
)
12096 module
= sym
->ns
->proc_name
->name
;
12097 else if (sym
->ns
&& sym
->ns
->parent
12098 && sym
->ns
&& sym
->ns
->parent
->proc_name
12099 && sym
->ns
->parent
->proc_name
->attr
.flavor
== FL_MODULE
)
12100 module
= sym
->ns
->parent
->proc_name
->name
;
12106 && (gsym
->type
== GSYM_FUNCTION
|| gsym
->type
== GSYM_SUBROUTINE
)))
12109 gsym
= gfc_get_gsymbol (sym
->binding_label
, true);
12110 gsym
->where
= sym
->declared_at
;
12111 gsym
->sym_name
= sym
->name
;
12112 gsym
->binding_label
= sym
->binding_label
;
12113 gsym
->ns
= sym
->ns
;
12114 gsym
->mod_name
= module
;
12115 if (sym
->attr
.function
)
12116 gsym
->type
= GSYM_FUNCTION
;
12117 else if (sym
->attr
.subroutine
)
12118 gsym
->type
= GSYM_SUBROUTINE
;
12119 /* Mark as variable/procedure as defined, unless its an INTERFACE. */
12120 gsym
->defined
= sym
->attr
.if_source
!= IFSRC_IFBODY
;
12124 if (sym
->attr
.flavor
== FL_VARIABLE
&& gsym
->type
!= GSYM_UNKNOWN
)
12126 gfc_error ("Variable %qs with binding label %qs at %L uses the same global "
12127 "identifier as entity at %L", sym
->name
,
12128 sym
->binding_label
, &sym
->declared_at
, &gsym
->where
);
12129 /* Clear the binding label to prevent checking multiple times. */
12130 sym
->binding_label
= NULL
;
12134 if (sym
->attr
.flavor
== FL_VARIABLE
&& module
12135 && (strcmp (module
, gsym
->mod_name
) != 0
12136 || strcmp (sym
->name
, gsym
->sym_name
) != 0))
12138 /* This can only happen if the variable is defined in a module - if it
12139 isn't the same module, reject it. */
12140 gfc_error ("Variable %qs from module %qs with binding label %qs at %L "
12141 "uses the same global identifier as entity at %L from module %qs",
12142 sym
->name
, module
, sym
->binding_label
,
12143 &sym
->declared_at
, &gsym
->where
, gsym
->mod_name
);
12144 sym
->binding_label
= NULL
;
12148 if ((sym
->attr
.function
|| sym
->attr
.subroutine
)
12149 && ((gsym
->type
!= GSYM_SUBROUTINE
&& gsym
->type
!= GSYM_FUNCTION
)
12150 || (gsym
->defined
&& sym
->attr
.if_source
!= IFSRC_IFBODY
))
12151 && (sym
!= gsym
->ns
->proc_name
&& sym
->attr
.entry
== 0)
12152 && (module
!= gsym
->mod_name
12153 || strcmp (gsym
->sym_name
, sym
->name
) != 0
12154 || (module
&& strcmp (module
, gsym
->mod_name
) != 0)))
12156 /* Print an error if the procedure is defined multiple times; we have to
12157 exclude references to the same procedure via module association or
12158 multiple checks for the same procedure. */
12159 gfc_error ("Procedure %qs with binding label %qs at %L uses the same "
12160 "global identifier as entity at %L", sym
->name
,
12161 sym
->binding_label
, &sym
->declared_at
, &gsym
->where
);
12162 sym
->binding_label
= NULL
;
12167 /* Resolve an index expression. */
12170 resolve_index_expr (gfc_expr
*e
)
12172 if (!gfc_resolve_expr (e
))
12175 if (!gfc_simplify_expr (e
, 0))
12178 if (!gfc_specification_expr (e
))
12185 /* Resolve a charlen structure. */
12188 resolve_charlen (gfc_charlen
*cl
)
12191 bool saved_specification_expr
;
12197 saved_specification_expr
= specification_expr
;
12198 specification_expr
= true;
12200 if (cl
->length_from_typespec
)
12202 if (!gfc_resolve_expr (cl
->length
))
12204 specification_expr
= saved_specification_expr
;
12208 if (!gfc_simplify_expr (cl
->length
, 0))
12210 specification_expr
= saved_specification_expr
;
12214 /* cl->length has been resolved. It should have an integer type. */
12215 if (cl
->length
->ts
.type
!= BT_INTEGER
)
12217 gfc_error ("Scalar INTEGER expression expected at %L",
12218 &cl
->length
->where
);
12224 if (!resolve_index_expr (cl
->length
))
12226 specification_expr
= saved_specification_expr
;
12231 /* F2008, 4.4.3.2: If the character length parameter value evaluates to
12232 a negative value, the length of character entities declared is zero. */
12233 if (cl
->length
&& cl
->length
->expr_type
== EXPR_CONSTANT
12234 && mpz_sgn (cl
->length
->value
.integer
) < 0)
12235 gfc_replace_expr (cl
->length
,
12236 gfc_get_int_expr (gfc_charlen_int_kind
, NULL
, 0));
12238 /* Check that the character length is not too large. */
12239 k
= gfc_validate_kind (BT_INTEGER
, gfc_charlen_int_kind
, false);
12240 if (cl
->length
&& cl
->length
->expr_type
== EXPR_CONSTANT
12241 && cl
->length
->ts
.type
== BT_INTEGER
12242 && mpz_cmp (cl
->length
->value
.integer
, gfc_integer_kinds
[k
].huge
) > 0)
12244 gfc_error ("String length at %L is too large", &cl
->length
->where
);
12245 specification_expr
= saved_specification_expr
;
12249 specification_expr
= saved_specification_expr
;
12254 /* Test for non-constant shape arrays. */
12257 is_non_constant_shape_array (gfc_symbol
*sym
)
12263 not_constant
= false;
12264 if (sym
->as
!= NULL
)
12266 /* Unfortunately, !gfc_is_compile_time_shape hits a legal case that
12267 has not been simplified; parameter array references. Do the
12268 simplification now. */
12269 for (i
= 0; i
< sym
->as
->rank
+ sym
->as
->corank
; i
++)
12271 e
= sym
->as
->lower
[i
];
12272 if (e
&& (!resolve_index_expr(e
)
12273 || !gfc_is_constant_expr (e
)))
12274 not_constant
= true;
12275 e
= sym
->as
->upper
[i
];
12276 if (e
&& (!resolve_index_expr(e
)
12277 || !gfc_is_constant_expr (e
)))
12278 not_constant
= true;
12281 return not_constant
;
12284 /* Given a symbol and an initialization expression, add code to initialize
12285 the symbol to the function entry. */
12287 build_init_assign (gfc_symbol
*sym
, gfc_expr
*init
)
12291 gfc_namespace
*ns
= sym
->ns
;
12293 /* Search for the function namespace if this is a contained
12294 function without an explicit result. */
12295 if (sym
->attr
.function
&& sym
== sym
->result
12296 && sym
->name
!= sym
->ns
->proc_name
->name
)
12298 ns
= ns
->contained
;
12299 for (;ns
; ns
= ns
->sibling
)
12300 if (strcmp (ns
->proc_name
->name
, sym
->name
) == 0)
12306 gfc_free_expr (init
);
12310 /* Build an l-value expression for the result. */
12311 lval
= gfc_lval_expr_from_sym (sym
);
12313 /* Add the code at scope entry. */
12314 init_st
= gfc_get_code (EXEC_INIT_ASSIGN
);
12315 init_st
->next
= ns
->code
;
12316 ns
->code
= init_st
;
12318 /* Assign the default initializer to the l-value. */
12319 init_st
->loc
= sym
->declared_at
;
12320 init_st
->expr1
= lval
;
12321 init_st
->expr2
= init
;
12325 /* Whether or not we can generate a default initializer for a symbol. */
12328 can_generate_init (gfc_symbol
*sym
)
12330 symbol_attribute
*a
;
12335 /* These symbols should never have a default initialization. */
12340 || (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
)
12341 && (CLASS_DATA (sym
)->attr
.class_pointer
12342 || CLASS_DATA (sym
)->attr
.proc_pointer
))
12343 || a
->in_equivalence
12350 || (!a
->referenced
&& !a
->result
)
12351 || (a
->dummy
&& a
->intent
!= INTENT_OUT
)
12352 || (a
->function
&& sym
!= sym
->result
)
12357 /* Assign the default initializer to a derived type variable or result. */
12360 apply_default_init (gfc_symbol
*sym
)
12362 gfc_expr
*init
= NULL
;
12364 if (sym
->attr
.flavor
!= FL_VARIABLE
&& !sym
->attr
.function
)
12367 if (sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
)
12368 init
= gfc_generate_initializer (&sym
->ts
, can_generate_init (sym
));
12370 if (init
== NULL
&& sym
->ts
.type
!= BT_CLASS
)
12373 build_init_assign (sym
, init
);
12374 sym
->attr
.referenced
= 1;
12378 /* Build an initializer for a local. Returns null if the symbol should not have
12379 a default initialization. */
12382 build_default_init_expr (gfc_symbol
*sym
)
12384 /* These symbols should never have a default initialization. */
12385 if (sym
->attr
.allocatable
12386 || sym
->attr
.external
12388 || sym
->attr
.pointer
12389 || sym
->attr
.in_equivalence
12390 || sym
->attr
.in_common
12393 || sym
->attr
.cray_pointee
12394 || sym
->attr
.cray_pointer
12398 /* Get the appropriate init expression. */
12399 return gfc_build_default_init_expr (&sym
->ts
, &sym
->declared_at
);
12402 /* Add an initialization expression to a local variable. */
12404 apply_default_init_local (gfc_symbol
*sym
)
12406 gfc_expr
*init
= NULL
;
12408 /* The symbol should be a variable or a function return value. */
12409 if ((sym
->attr
.flavor
!= FL_VARIABLE
&& !sym
->attr
.function
)
12410 || (sym
->attr
.function
&& sym
->result
!= sym
))
12413 /* Try to build the initializer expression. If we can't initialize
12414 this symbol, then init will be NULL. */
12415 init
= build_default_init_expr (sym
);
12419 /* For saved variables, we don't want to add an initializer at function
12420 entry, so we just add a static initializer. Note that automatic variables
12421 are stack allocated even with -fno-automatic; we have also to exclude
12422 result variable, which are also nonstatic. */
12423 if (!sym
->attr
.automatic
12424 && (sym
->attr
.save
|| sym
->ns
->save_all
12425 || (flag_max_stack_var_size
== 0 && !sym
->attr
.result
12426 && (sym
->ns
->proc_name
&& !sym
->ns
->proc_name
->attr
.recursive
)
12427 && (!sym
->attr
.dimension
|| !is_non_constant_shape_array (sym
)))))
12429 /* Don't clobber an existing initializer! */
12430 gcc_assert (sym
->value
== NULL
);
12435 build_init_assign (sym
, init
);
12439 /* Resolution of common features of flavors variable and procedure. */
12442 resolve_fl_var_and_proc (gfc_symbol
*sym
, int mp_flag
)
12444 gfc_array_spec
*as
;
12446 if (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
)
12447 as
= CLASS_DATA (sym
)->as
;
12451 /* Constraints on deferred shape variable. */
12452 if (as
== NULL
|| as
->type
!= AS_DEFERRED
)
12454 bool pointer
, allocatable
, dimension
;
12456 if (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
)
12458 pointer
= CLASS_DATA (sym
)->attr
.class_pointer
;
12459 allocatable
= CLASS_DATA (sym
)->attr
.allocatable
;
12460 dimension
= CLASS_DATA (sym
)->attr
.dimension
;
12464 pointer
= sym
->attr
.pointer
&& !sym
->attr
.select_type_temporary
;
12465 allocatable
= sym
->attr
.allocatable
;
12466 dimension
= sym
->attr
.dimension
;
12471 if (dimension
&& as
->type
!= AS_ASSUMED_RANK
)
12473 gfc_error ("Allocatable array %qs at %L must have a deferred "
12474 "shape or assumed rank", sym
->name
, &sym
->declared_at
);
12477 else if (!gfc_notify_std (GFC_STD_F2003
, "Scalar object "
12478 "%qs at %L may not be ALLOCATABLE",
12479 sym
->name
, &sym
->declared_at
))
12483 if (pointer
&& dimension
&& as
->type
!= AS_ASSUMED_RANK
)
12485 gfc_error ("Array pointer %qs at %L must have a deferred shape or "
12486 "assumed rank", sym
->name
, &sym
->declared_at
);
12492 if (!mp_flag
&& !sym
->attr
.allocatable
&& !sym
->attr
.pointer
12493 && sym
->ts
.type
!= BT_CLASS
&& !sym
->assoc
)
12495 gfc_error ("Array %qs at %L cannot have a deferred shape",
12496 sym
->name
, &sym
->declared_at
);
12501 /* Constraints on polymorphic variables. */
12502 if (sym
->ts
.type
== BT_CLASS
&& !(sym
->result
&& sym
->result
!= sym
))
12505 if (sym
->attr
.class_ok
12506 && !sym
->attr
.select_type_temporary
12507 && !UNLIMITED_POLY (sym
)
12508 && !gfc_type_is_extensible (CLASS_DATA (sym
)->ts
.u
.derived
))
12510 gfc_error ("Type %qs of CLASS variable %qs at %L is not extensible",
12511 CLASS_DATA (sym
)->ts
.u
.derived
->name
, sym
->name
,
12512 &sym
->declared_at
);
12517 /* Assume that use associated symbols were checked in the module ns.
12518 Class-variables that are associate-names are also something special
12519 and excepted from the test. */
12520 if (!sym
->attr
.class_ok
&& !sym
->attr
.use_assoc
&& !sym
->assoc
)
12522 gfc_error ("CLASS variable %qs at %L must be dummy, allocatable "
12523 "or pointer", sym
->name
, &sym
->declared_at
);
12532 /* Additional checks for symbols with flavor variable and derived
12533 type. To be called from resolve_fl_variable. */
12536 resolve_fl_variable_derived (gfc_symbol
*sym
, int no_init_flag
)
12538 gcc_assert (sym
->ts
.type
== BT_DERIVED
|| sym
->ts
.type
== BT_CLASS
);
12540 /* Check to see if a derived type is blocked from being host
12541 associated by the presence of another class I symbol in the same
12542 namespace. 14.6.1.3 of the standard and the discussion on
12543 comp.lang.fortran. */
12544 if (sym
->ns
!= sym
->ts
.u
.derived
->ns
12545 && !sym
->ts
.u
.derived
->attr
.use_assoc
12546 && sym
->ns
->proc_name
->attr
.if_source
!= IFSRC_IFBODY
)
12549 gfc_find_symbol (sym
->ts
.u
.derived
->name
, sym
->ns
, 0, &s
);
12550 if (s
&& s
->attr
.generic
)
12551 s
= gfc_find_dt_in_generic (s
);
12552 if (s
&& !gfc_fl_struct (s
->attr
.flavor
))
12554 gfc_error ("The type %qs cannot be host associated at %L "
12555 "because it is blocked by an incompatible object "
12556 "of the same name declared at %L",
12557 sym
->ts
.u
.derived
->name
, &sym
->declared_at
,
12563 /* 4th constraint in section 11.3: "If an object of a type for which
12564 component-initialization is specified (R429) appears in the
12565 specification-part of a module and does not have the ALLOCATABLE
12566 or POINTER attribute, the object shall have the SAVE attribute."
12568 The check for initializers is performed with
12569 gfc_has_default_initializer because gfc_default_initializer generates
12570 a hidden default for allocatable components. */
12571 if (!(sym
->value
|| no_init_flag
) && sym
->ns
->proc_name
12572 && sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
12573 && !(sym
->ns
->save_all
&& !sym
->attr
.automatic
) && !sym
->attr
.save
12574 && !sym
->attr
.pointer
&& !sym
->attr
.allocatable
12575 && gfc_has_default_initializer (sym
->ts
.u
.derived
)
12576 && !gfc_notify_std (GFC_STD_F2008
, "Implied SAVE for module variable "
12577 "%qs at %L, needed due to the default "
12578 "initialization", sym
->name
, &sym
->declared_at
))
12581 /* Assign default initializer. */
12582 if (!(sym
->value
|| sym
->attr
.pointer
|| sym
->attr
.allocatable
)
12583 && (!no_init_flag
|| sym
->attr
.intent
== INTENT_OUT
))
12584 sym
->value
= gfc_generate_initializer (&sym
->ts
, can_generate_init (sym
));
12590 /* F2008, C402 (R401): A colon shall not be used as a type-param-value
12591 except in the declaration of an entity or component that has the POINTER
12592 or ALLOCATABLE attribute. */
12595 deferred_requirements (gfc_symbol
*sym
)
12597 if (sym
->ts
.deferred
12598 && !(sym
->attr
.pointer
12599 || sym
->attr
.allocatable
12600 || sym
->attr
.associate_var
12601 || sym
->attr
.omp_udr_artificial_var
))
12603 /* If a function has a result variable, only check the variable. */
12604 if (sym
->result
&& sym
->name
!= sym
->result
->name
)
12607 gfc_error ("Entity %qs at %L has a deferred type parameter and "
12608 "requires either the POINTER or ALLOCATABLE attribute",
12609 sym
->name
, &sym
->declared_at
);
12616 /* Resolve symbols with flavor variable. */
12619 resolve_fl_variable (gfc_symbol
*sym
, int mp_flag
)
12621 const char *auto_save_msg
= "Automatic object %qs at %L cannot have the "
12624 if (!resolve_fl_var_and_proc (sym
, mp_flag
))
12627 /* Set this flag to check that variables are parameters of all entries.
12628 This check is effected by the call to gfc_resolve_expr through
12629 is_non_constant_shape_array. */
12630 bool saved_specification_expr
= specification_expr
;
12631 specification_expr
= true;
12633 if (sym
->ns
->proc_name
12634 && (sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
12635 || sym
->ns
->proc_name
->attr
.is_main_program
)
12636 && !sym
->attr
.use_assoc
12637 && !sym
->attr
.allocatable
12638 && !sym
->attr
.pointer
12639 && is_non_constant_shape_array (sym
))
12641 /* F08:C541. The shape of an array defined in a main program or module
12642 * needs to be constant. */
12643 gfc_error ("The module or main program array %qs at %L must "
12644 "have constant shape", sym
->name
, &sym
->declared_at
);
12645 specification_expr
= saved_specification_expr
;
12649 /* Constraints on deferred type parameter. */
12650 if (!deferred_requirements (sym
))
12653 if (sym
->ts
.type
== BT_CHARACTER
&& !sym
->attr
.associate_var
)
12655 /* Make sure that character string variables with assumed length are
12656 dummy arguments. */
12657 gfc_expr
*e
= NULL
;
12660 e
= sym
->ts
.u
.cl
->length
;
12664 if (e
== NULL
&& !sym
->attr
.dummy
&& !sym
->attr
.result
12665 && !sym
->ts
.deferred
&& !sym
->attr
.select_type_temporary
12666 && !sym
->attr
.omp_udr_artificial_var
)
12668 gfc_error ("Entity with assumed character length at %L must be a "
12669 "dummy argument or a PARAMETER", &sym
->declared_at
);
12670 specification_expr
= saved_specification_expr
;
12674 if (e
&& sym
->attr
.save
== SAVE_EXPLICIT
&& !gfc_is_constant_expr (e
))
12676 gfc_error (auto_save_msg
, sym
->name
, &sym
->declared_at
);
12677 specification_expr
= saved_specification_expr
;
12681 if (!gfc_is_constant_expr (e
)
12682 && !(e
->expr_type
== EXPR_VARIABLE
12683 && e
->symtree
->n
.sym
->attr
.flavor
== FL_PARAMETER
))
12685 if (!sym
->attr
.use_assoc
&& sym
->ns
->proc_name
12686 && (sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
12687 || sym
->ns
->proc_name
->attr
.is_main_program
))
12689 gfc_error ("%qs at %L must have constant character length "
12690 "in this context", sym
->name
, &sym
->declared_at
);
12691 specification_expr
= saved_specification_expr
;
12694 if (sym
->attr
.in_common
)
12696 gfc_error ("COMMON variable %qs at %L must have constant "
12697 "character length", sym
->name
, &sym
->declared_at
);
12698 specification_expr
= saved_specification_expr
;
12704 if (sym
->value
== NULL
&& sym
->attr
.referenced
)
12705 apply_default_init_local (sym
); /* Try to apply a default initialization. */
12707 /* Determine if the symbol may not have an initializer. */
12708 int no_init_flag
= 0, automatic_flag
= 0;
12709 if (sym
->attr
.allocatable
|| sym
->attr
.external
|| sym
->attr
.dummy
12710 || sym
->attr
.intrinsic
|| sym
->attr
.result
)
12712 else if ((sym
->attr
.dimension
|| sym
->attr
.codimension
) && !sym
->attr
.pointer
12713 && is_non_constant_shape_array (sym
))
12715 no_init_flag
= automatic_flag
= 1;
12717 /* Also, they must not have the SAVE attribute.
12718 SAVE_IMPLICIT is checked below. */
12719 if (sym
->as
&& sym
->attr
.codimension
)
12721 int corank
= sym
->as
->corank
;
12722 sym
->as
->corank
= 0;
12723 no_init_flag
= automatic_flag
= is_non_constant_shape_array (sym
);
12724 sym
->as
->corank
= corank
;
12726 if (automatic_flag
&& sym
->attr
.save
== SAVE_EXPLICIT
)
12728 gfc_error (auto_save_msg
, sym
->name
, &sym
->declared_at
);
12729 specification_expr
= saved_specification_expr
;
12734 /* Ensure that any initializer is simplified. */
12736 gfc_simplify_expr (sym
->value
, 1);
12738 /* Reject illegal initializers. */
12739 if (!sym
->mark
&& sym
->value
)
12741 if (sym
->attr
.allocatable
|| (sym
->ts
.type
== BT_CLASS
12742 && CLASS_DATA (sym
)->attr
.allocatable
))
12743 gfc_error ("Allocatable %qs at %L cannot have an initializer",
12744 sym
->name
, &sym
->declared_at
);
12745 else if (sym
->attr
.external
)
12746 gfc_error ("External %qs at %L cannot have an initializer",
12747 sym
->name
, &sym
->declared_at
);
12748 else if (sym
->attr
.dummy
12749 && !(sym
->ts
.type
== BT_DERIVED
&& sym
->attr
.intent
== INTENT_OUT
))
12750 gfc_error ("Dummy %qs at %L cannot have an initializer",
12751 sym
->name
, &sym
->declared_at
);
12752 else if (sym
->attr
.intrinsic
)
12753 gfc_error ("Intrinsic %qs at %L cannot have an initializer",
12754 sym
->name
, &sym
->declared_at
);
12755 else if (sym
->attr
.result
)
12756 gfc_error ("Function result %qs at %L cannot have an initializer",
12757 sym
->name
, &sym
->declared_at
);
12758 else if (automatic_flag
)
12759 gfc_error ("Automatic array %qs at %L cannot have an initializer",
12760 sym
->name
, &sym
->declared_at
);
12762 goto no_init_error
;
12763 specification_expr
= saved_specification_expr
;
12768 if (sym
->ts
.type
== BT_DERIVED
|| sym
->ts
.type
== BT_CLASS
)
12770 bool res
= resolve_fl_variable_derived (sym
, no_init_flag
);
12771 specification_expr
= saved_specification_expr
;
12775 specification_expr
= saved_specification_expr
;
12780 /* Compare the dummy characteristics of a module procedure interface
12781 declaration with the corresponding declaration in a submodule. */
12782 static gfc_formal_arglist
*new_formal
;
12783 static char errmsg
[200];
12786 compare_fsyms (gfc_symbol
*sym
)
12790 if (sym
== NULL
|| new_formal
== NULL
)
12793 fsym
= new_formal
->sym
;
12798 if (strcmp (sym
->name
, fsym
->name
) == 0)
12800 if (!gfc_check_dummy_characteristics (fsym
, sym
, true, errmsg
, 200))
12801 gfc_error ("%s at %L", errmsg
, &fsym
->declared_at
);
12806 /* Resolve a procedure. */
12809 resolve_fl_procedure (gfc_symbol
*sym
, int mp_flag
)
12811 gfc_formal_arglist
*arg
;
12813 if (sym
->attr
.function
12814 && !resolve_fl_var_and_proc (sym
, mp_flag
))
12817 /* Constraints on deferred type parameter. */
12818 if (!deferred_requirements (sym
))
12821 if (sym
->ts
.type
== BT_CHARACTER
)
12823 gfc_charlen
*cl
= sym
->ts
.u
.cl
;
12825 if (cl
&& cl
->length
&& gfc_is_constant_expr (cl
->length
)
12826 && !resolve_charlen (cl
))
12829 if ((!cl
|| !cl
->length
|| cl
->length
->expr_type
!= EXPR_CONSTANT
)
12830 && sym
->attr
.proc
== PROC_ST_FUNCTION
)
12832 gfc_error ("Character-valued statement function %qs at %L must "
12833 "have constant length", sym
->name
, &sym
->declared_at
);
12838 /* Ensure that derived type for are not of a private type. Internal
12839 module procedures are excluded by 2.2.3.3 - i.e., they are not
12840 externally accessible and can access all the objects accessible in
12842 if (!(sym
->ns
->parent
&& sym
->ns
->parent
->proc_name
12843 && sym
->ns
->parent
->proc_name
->attr
.flavor
== FL_MODULE
)
12844 && gfc_check_symbol_access (sym
))
12846 gfc_interface
*iface
;
12848 for (arg
= gfc_sym_get_dummy_args (sym
); arg
; arg
= arg
->next
)
12851 && arg
->sym
->ts
.type
== BT_DERIVED
12852 && !arg
->sym
->ts
.u
.derived
->attr
.use_assoc
12853 && !gfc_check_symbol_access (arg
->sym
->ts
.u
.derived
)
12854 && !gfc_notify_std (GFC_STD_F2003
, "%qs is of a PRIVATE type "
12855 "and cannot be a dummy argument"
12856 " of %qs, which is PUBLIC at %L",
12857 arg
->sym
->name
, sym
->name
,
12858 &sym
->declared_at
))
12860 /* Stop this message from recurring. */
12861 arg
->sym
->ts
.u
.derived
->attr
.access
= ACCESS_PUBLIC
;
12866 /* PUBLIC interfaces may expose PRIVATE procedures that take types
12867 PRIVATE to the containing module. */
12868 for (iface
= sym
->generic
; iface
; iface
= iface
->next
)
12870 for (arg
= gfc_sym_get_dummy_args (iface
->sym
); arg
; arg
= arg
->next
)
12873 && arg
->sym
->ts
.type
== BT_DERIVED
12874 && !arg
->sym
->ts
.u
.derived
->attr
.use_assoc
12875 && !gfc_check_symbol_access (arg
->sym
->ts
.u
.derived
)
12876 && !gfc_notify_std (GFC_STD_F2003
, "Procedure %qs in "
12877 "PUBLIC interface %qs at %L "
12878 "takes dummy arguments of %qs which "
12879 "is PRIVATE", iface
->sym
->name
,
12880 sym
->name
, &iface
->sym
->declared_at
,
12881 gfc_typename(&arg
->sym
->ts
)))
12883 /* Stop this message from recurring. */
12884 arg
->sym
->ts
.u
.derived
->attr
.access
= ACCESS_PUBLIC
;
12891 if (sym
->attr
.function
&& sym
->value
&& sym
->attr
.proc
!= PROC_ST_FUNCTION
12892 && !sym
->attr
.proc_pointer
)
12894 gfc_error ("Function %qs at %L cannot have an initializer",
12895 sym
->name
, &sym
->declared_at
);
12897 /* Make sure no second error is issued for this. */
12898 sym
->value
->error
= 1;
12902 /* An external symbol may not have an initializer because it is taken to be
12903 a procedure. Exception: Procedure Pointers. */
12904 if (sym
->attr
.external
&& sym
->value
&& !sym
->attr
.proc_pointer
)
12906 gfc_error ("External object %qs at %L may not have an initializer",
12907 sym
->name
, &sym
->declared_at
);
12911 /* An elemental function is required to return a scalar 12.7.1 */
12912 if (sym
->attr
.elemental
&& sym
->attr
.function
12913 && (sym
->as
|| (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
)->as
)))
12915 gfc_error ("ELEMENTAL function %qs at %L must have a scalar "
12916 "result", sym
->name
, &sym
->declared_at
);
12917 /* Reset so that the error only occurs once. */
12918 sym
->attr
.elemental
= 0;
12922 if (sym
->attr
.proc
== PROC_ST_FUNCTION
12923 && (sym
->attr
.allocatable
|| sym
->attr
.pointer
))
12925 gfc_error ("Statement function %qs at %L may not have pointer or "
12926 "allocatable attribute", sym
->name
, &sym
->declared_at
);
12930 /* 5.1.1.5 of the Standard: A function name declared with an asterisk
12931 char-len-param shall not be array-valued, pointer-valued, recursive
12932 or pure. ....snip... A character value of * may only be used in the
12933 following ways: (i) Dummy arg of procedure - dummy associates with
12934 actual length; (ii) To declare a named constant; or (iii) External
12935 function - but length must be declared in calling scoping unit. */
12936 if (sym
->attr
.function
12937 && sym
->ts
.type
== BT_CHARACTER
&& !sym
->ts
.deferred
12938 && sym
->ts
.u
.cl
&& sym
->ts
.u
.cl
->length
== NULL
)
12940 if ((sym
->as
&& sym
->as
->rank
) || (sym
->attr
.pointer
)
12941 || (sym
->attr
.recursive
) || (sym
->attr
.pure
))
12943 if (sym
->as
&& sym
->as
->rank
)
12944 gfc_error ("CHARACTER(*) function %qs at %L cannot be "
12945 "array-valued", sym
->name
, &sym
->declared_at
);
12947 if (sym
->attr
.pointer
)
12948 gfc_error ("CHARACTER(*) function %qs at %L cannot be "
12949 "pointer-valued", sym
->name
, &sym
->declared_at
);
12951 if (sym
->attr
.pure
)
12952 gfc_error ("CHARACTER(*) function %qs at %L cannot be "
12953 "pure", sym
->name
, &sym
->declared_at
);
12955 if (sym
->attr
.recursive
)
12956 gfc_error ("CHARACTER(*) function %qs at %L cannot be "
12957 "recursive", sym
->name
, &sym
->declared_at
);
12962 /* Appendix B.2 of the standard. Contained functions give an
12963 error anyway. Deferred character length is an F2003 feature.
12964 Don't warn on intrinsic conversion functions, which start
12965 with two underscores. */
12966 if (!sym
->attr
.contained
&& !sym
->ts
.deferred
12967 && (sym
->name
[0] != '_' || sym
->name
[1] != '_'))
12968 gfc_notify_std (GFC_STD_F95_OBS
,
12969 "CHARACTER(*) function %qs at %L",
12970 sym
->name
, &sym
->declared_at
);
12973 /* F2008, C1218. */
12974 if (sym
->attr
.elemental
)
12976 if (sym
->attr
.proc_pointer
)
12978 gfc_error ("Procedure pointer %qs at %L shall not be elemental",
12979 sym
->name
, &sym
->declared_at
);
12982 if (sym
->attr
.dummy
)
12984 gfc_error ("Dummy procedure %qs at %L shall not be elemental",
12985 sym
->name
, &sym
->declared_at
);
12990 /* F2018, C15100: "The result of an elemental function shall be scalar,
12991 and shall not have the POINTER or ALLOCATABLE attribute." The scalar
12992 pointer is tested and caught elsewhere. */
12993 if (sym
->attr
.elemental
&& sym
->result
12994 && (sym
->result
->attr
.allocatable
|| sym
->result
->attr
.pointer
))
12996 gfc_error ("Function result variable %qs at %L of elemental "
12997 "function %qs shall not have an ALLOCATABLE or POINTER "
12998 "attribute", sym
->result
->name
,
12999 &sym
->result
->declared_at
, sym
->name
);
13003 if (sym
->attr
.is_bind_c
&& sym
->attr
.is_c_interop
!= 1)
13005 gfc_formal_arglist
*curr_arg
;
13006 int has_non_interop_arg
= 0;
13008 if (!verify_bind_c_sym (sym
, &(sym
->ts
), sym
->attr
.in_common
,
13009 sym
->common_block
))
13011 /* Clear these to prevent looking at them again if there was an
13013 sym
->attr
.is_bind_c
= 0;
13014 sym
->attr
.is_c_interop
= 0;
13015 sym
->ts
.is_c_interop
= 0;
13019 /* So far, no errors have been found. */
13020 sym
->attr
.is_c_interop
= 1;
13021 sym
->ts
.is_c_interop
= 1;
13024 curr_arg
= gfc_sym_get_dummy_args (sym
);
13025 while (curr_arg
!= NULL
)
13027 /* Skip implicitly typed dummy args here. */
13028 if (curr_arg
->sym
&& curr_arg
->sym
->attr
.implicit_type
== 0)
13029 if (!gfc_verify_c_interop_param (curr_arg
->sym
))
13030 /* If something is found to fail, record the fact so we
13031 can mark the symbol for the procedure as not being
13032 BIND(C) to try and prevent multiple errors being
13034 has_non_interop_arg
= 1;
13036 curr_arg
= curr_arg
->next
;
13039 /* See if any of the arguments were not interoperable and if so, clear
13040 the procedure symbol to prevent duplicate error messages. */
13041 if (has_non_interop_arg
!= 0)
13043 sym
->attr
.is_c_interop
= 0;
13044 sym
->ts
.is_c_interop
= 0;
13045 sym
->attr
.is_bind_c
= 0;
13049 if (!sym
->attr
.proc_pointer
)
13051 if (sym
->attr
.save
== SAVE_EXPLICIT
)
13053 gfc_error ("PROCEDURE attribute conflicts with SAVE attribute "
13054 "in %qs at %L", sym
->name
, &sym
->declared_at
);
13057 if (sym
->attr
.intent
)
13059 gfc_error ("PROCEDURE attribute conflicts with INTENT attribute "
13060 "in %qs at %L", sym
->name
, &sym
->declared_at
);
13063 if (sym
->attr
.subroutine
&& sym
->attr
.result
)
13065 gfc_error ("PROCEDURE attribute conflicts with RESULT attribute "
13066 "in %qs at %L", sym
->name
, &sym
->declared_at
);
13069 if (sym
->attr
.external
&& sym
->attr
.function
&& !sym
->attr
.module_procedure
13070 && ((sym
->attr
.if_source
== IFSRC_DECL
&& !sym
->attr
.procedure
)
13071 || sym
->attr
.contained
))
13073 gfc_error ("EXTERNAL attribute conflicts with FUNCTION attribute "
13074 "in %qs at %L", sym
->name
, &sym
->declared_at
);
13077 if (strcmp ("ppr@", sym
->name
) == 0)
13079 gfc_error ("Procedure pointer result %qs at %L "
13080 "is missing the pointer attribute",
13081 sym
->ns
->proc_name
->name
, &sym
->declared_at
);
13086 /* Assume that a procedure whose body is not known has references
13087 to external arrays. */
13088 if (sym
->attr
.if_source
!= IFSRC_DECL
)
13089 sym
->attr
.array_outer_dependency
= 1;
13091 /* Compare the characteristics of a module procedure with the
13092 interface declaration. Ideally this would be done with
13093 gfc_compare_interfaces but, at present, the formal interface
13094 cannot be copied to the ts.interface. */
13095 if (sym
->attr
.module_procedure
13096 && sym
->attr
.if_source
== IFSRC_DECL
)
13099 char name
[2*GFC_MAX_SYMBOL_LEN
+ 1];
13101 char *submodule_name
;
13102 strcpy (name
, sym
->ns
->proc_name
->name
);
13103 module_name
= strtok (name
, ".");
13104 submodule_name
= strtok (NULL
, ".");
13106 iface
= sym
->tlink
;
13109 /* Make sure that the result uses the correct charlen for deferred
13111 if (iface
&& sym
->result
13112 && iface
->ts
.type
== BT_CHARACTER
13113 && iface
->ts
.deferred
)
13114 sym
->result
->ts
.u
.cl
= iface
->ts
.u
.cl
;
13119 /* Check the procedure characteristics. */
13120 if (sym
->attr
.elemental
!= iface
->attr
.elemental
)
13122 gfc_error ("Mismatch in ELEMENTAL attribute between MODULE "
13123 "PROCEDURE at %L and its interface in %s",
13124 &sym
->declared_at
, module_name
);
13128 if (sym
->attr
.pure
!= iface
->attr
.pure
)
13130 gfc_error ("Mismatch in PURE attribute between MODULE "
13131 "PROCEDURE at %L and its interface in %s",
13132 &sym
->declared_at
, module_name
);
13136 if (sym
->attr
.recursive
!= iface
->attr
.recursive
)
13138 gfc_error ("Mismatch in RECURSIVE attribute between MODULE "
13139 "PROCEDURE at %L and its interface in %s",
13140 &sym
->declared_at
, module_name
);
13144 /* Check the result characteristics. */
13145 if (!gfc_check_result_characteristics (sym
, iface
, errmsg
, 200))
13147 gfc_error ("%s between the MODULE PROCEDURE declaration "
13148 "in MODULE %qs and the declaration at %L in "
13150 errmsg
, module_name
, &sym
->declared_at
,
13151 submodule_name
? submodule_name
: module_name
);
13156 /* Check the characteristics of the formal arguments. */
13157 if (sym
->formal
&& sym
->formal_ns
)
13159 for (arg
= sym
->formal
; arg
&& arg
->sym
; arg
= arg
->next
)
13162 gfc_traverse_ns (sym
->formal_ns
, compare_fsyms
);
13170 /* Resolve a list of finalizer procedures. That is, after they have hopefully
13171 been defined and we now know their defined arguments, check that they fulfill
13172 the requirements of the standard for procedures used as finalizers. */
13175 gfc_resolve_finalizers (gfc_symbol
* derived
, bool *finalizable
)
13177 gfc_finalizer
* list
;
13178 gfc_finalizer
** prev_link
; /* For removing wrong entries from the list. */
13179 bool result
= true;
13180 bool seen_scalar
= false;
13183 gfc_symbol
*parent
= gfc_get_derived_super_type (derived
);
13186 gfc_resolve_finalizers (parent
, finalizable
);
13188 /* Ensure that derived-type components have a their finalizers resolved. */
13189 bool has_final
= derived
->f2k_derived
&& derived
->f2k_derived
->finalizers
;
13190 for (c
= derived
->components
; c
; c
= c
->next
)
13191 if (c
->ts
.type
== BT_DERIVED
13192 && !c
->attr
.pointer
&& !c
->attr
.proc_pointer
&& !c
->attr
.allocatable
)
13194 bool has_final2
= false;
13195 if (!gfc_resolve_finalizers (c
->ts
.u
.derived
, &has_final2
))
13196 return false; /* Error. */
13197 has_final
= has_final
|| has_final2
;
13199 /* Return early if not finalizable. */
13203 *finalizable
= false;
13207 /* Walk over the list of finalizer-procedures, check them, and if any one
13208 does not fit in with the standard's definition, print an error and remove
13209 it from the list. */
13210 prev_link
= &derived
->f2k_derived
->finalizers
;
13211 for (list
= derived
->f2k_derived
->finalizers
; list
; list
= *prev_link
)
13213 gfc_formal_arglist
*dummy_args
;
13218 /* Skip this finalizer if we already resolved it. */
13219 if (list
->proc_tree
)
13221 if (list
->proc_tree
->n
.sym
->formal
->sym
->as
== NULL
13222 || list
->proc_tree
->n
.sym
->formal
->sym
->as
->rank
== 0)
13223 seen_scalar
= true;
13224 prev_link
= &(list
->next
);
13228 /* Check this exists and is a SUBROUTINE. */
13229 if (!list
->proc_sym
->attr
.subroutine
)
13231 gfc_error ("FINAL procedure %qs at %L is not a SUBROUTINE",
13232 list
->proc_sym
->name
, &list
->where
);
13236 /* We should have exactly one argument. */
13237 dummy_args
= gfc_sym_get_dummy_args (list
->proc_sym
);
13238 if (!dummy_args
|| dummy_args
->next
)
13240 gfc_error ("FINAL procedure at %L must have exactly one argument",
13244 arg
= dummy_args
->sym
;
13246 /* This argument must be of our type. */
13247 if (arg
->ts
.type
!= BT_DERIVED
|| arg
->ts
.u
.derived
!= derived
)
13249 gfc_error ("Argument of FINAL procedure at %L must be of type %qs",
13250 &arg
->declared_at
, derived
->name
);
13254 /* It must neither be a pointer nor allocatable nor optional. */
13255 if (arg
->attr
.pointer
)
13257 gfc_error ("Argument of FINAL procedure at %L must not be a POINTER",
13258 &arg
->declared_at
);
13261 if (arg
->attr
.allocatable
)
13263 gfc_error ("Argument of FINAL procedure at %L must not be"
13264 " ALLOCATABLE", &arg
->declared_at
);
13267 if (arg
->attr
.optional
)
13269 gfc_error ("Argument of FINAL procedure at %L must not be OPTIONAL",
13270 &arg
->declared_at
);
13274 /* It must not be INTENT(OUT). */
13275 if (arg
->attr
.intent
== INTENT_OUT
)
13277 gfc_error ("Argument of FINAL procedure at %L must not be"
13278 " INTENT(OUT)", &arg
->declared_at
);
13282 /* Warn if the procedure is non-scalar and not assumed shape. */
13283 if (warn_surprising
&& arg
->as
&& arg
->as
->rank
!= 0
13284 && arg
->as
->type
!= AS_ASSUMED_SHAPE
)
13285 gfc_warning (OPT_Wsurprising
,
13286 "Non-scalar FINAL procedure at %L should have assumed"
13287 " shape argument", &arg
->declared_at
);
13289 /* Check that it does not match in kind and rank with a FINAL procedure
13290 defined earlier. To really loop over the *earlier* declarations,
13291 we need to walk the tail of the list as new ones were pushed at the
13293 /* TODO: Handle kind parameters once they are implemented. */
13294 my_rank
= (arg
->as
? arg
->as
->rank
: 0);
13295 for (i
= list
->next
; i
; i
= i
->next
)
13297 gfc_formal_arglist
*dummy_args
;
13299 /* Argument list might be empty; that is an error signalled earlier,
13300 but we nevertheless continued resolving. */
13301 dummy_args
= gfc_sym_get_dummy_args (i
->proc_sym
);
13304 gfc_symbol
* i_arg
= dummy_args
->sym
;
13305 const int i_rank
= (i_arg
->as
? i_arg
->as
->rank
: 0);
13306 if (i_rank
== my_rank
)
13308 gfc_error ("FINAL procedure %qs declared at %L has the same"
13309 " rank (%d) as %qs",
13310 list
->proc_sym
->name
, &list
->where
, my_rank
,
13311 i
->proc_sym
->name
);
13317 /* Is this the/a scalar finalizer procedure? */
13319 seen_scalar
= true;
13321 /* Find the symtree for this procedure. */
13322 gcc_assert (!list
->proc_tree
);
13323 list
->proc_tree
= gfc_find_sym_in_symtree (list
->proc_sym
);
13325 prev_link
= &list
->next
;
13328 /* Remove wrong nodes immediately from the list so we don't risk any
13329 troubles in the future when they might fail later expectations. */
13332 *prev_link
= list
->next
;
13333 gfc_free_finalizer (i
);
13337 if (result
== false)
13340 /* Warn if we haven't seen a scalar finalizer procedure (but we know there
13341 were nodes in the list, must have been for arrays. It is surely a good
13342 idea to have a scalar version there if there's something to finalize. */
13343 if (warn_surprising
&& derived
->f2k_derived
->finalizers
&& !seen_scalar
)
13344 gfc_warning (OPT_Wsurprising
,
13345 "Only array FINAL procedures declared for derived type %qs"
13346 " defined at %L, suggest also scalar one",
13347 derived
->name
, &derived
->declared_at
);
13349 vtab
= gfc_find_derived_vtab (derived
);
13350 c
= vtab
->ts
.u
.derived
->components
->next
->next
->next
->next
->next
;
13351 gfc_set_sym_referenced (c
->initializer
->symtree
->n
.sym
);
13354 *finalizable
= true;
13360 /* Check if two GENERIC targets are ambiguous and emit an error is they are. */
13363 check_generic_tbp_ambiguity (gfc_tbp_generic
* t1
, gfc_tbp_generic
* t2
,
13364 const char* generic_name
, locus where
)
13366 gfc_symbol
*sym1
, *sym2
;
13367 const char *pass1
, *pass2
;
13368 gfc_formal_arglist
*dummy_args
;
13370 gcc_assert (t1
->specific
&& t2
->specific
);
13371 gcc_assert (!t1
->specific
->is_generic
);
13372 gcc_assert (!t2
->specific
->is_generic
);
13373 gcc_assert (t1
->is_operator
== t2
->is_operator
);
13375 sym1
= t1
->specific
->u
.specific
->n
.sym
;
13376 sym2
= t2
->specific
->u
.specific
->n
.sym
;
13381 /* Both must be SUBROUTINEs or both must be FUNCTIONs. */
13382 if (sym1
->attr
.subroutine
!= sym2
->attr
.subroutine
13383 || sym1
->attr
.function
!= sym2
->attr
.function
)
13385 gfc_error ("%qs and %qs cannot be mixed FUNCTION/SUBROUTINE for"
13386 " GENERIC %qs at %L",
13387 sym1
->name
, sym2
->name
, generic_name
, &where
);
13391 /* Determine PASS arguments. */
13392 if (t1
->specific
->nopass
)
13394 else if (t1
->specific
->pass_arg
)
13395 pass1
= t1
->specific
->pass_arg
;
13398 dummy_args
= gfc_sym_get_dummy_args (t1
->specific
->u
.specific
->n
.sym
);
13400 pass1
= dummy_args
->sym
->name
;
13404 if (t2
->specific
->nopass
)
13406 else if (t2
->specific
->pass_arg
)
13407 pass2
= t2
->specific
->pass_arg
;
13410 dummy_args
= gfc_sym_get_dummy_args (t2
->specific
->u
.specific
->n
.sym
);
13412 pass2
= dummy_args
->sym
->name
;
13417 /* Compare the interfaces. */
13418 if (gfc_compare_interfaces (sym1
, sym2
, sym2
->name
, !t1
->is_operator
, 0,
13419 NULL
, 0, pass1
, pass2
))
13421 gfc_error ("%qs and %qs for GENERIC %qs at %L are ambiguous",
13422 sym1
->name
, sym2
->name
, generic_name
, &where
);
13430 /* Worker function for resolving a generic procedure binding; this is used to
13431 resolve GENERIC as well as user and intrinsic OPERATOR typebound procedures.
13433 The difference between those cases is finding possible inherited bindings
13434 that are overridden, as one has to look for them in tb_sym_root,
13435 tb_uop_root or tb_op, respectively. Thus the caller must already find
13436 the super-type and set p->overridden correctly. */
13439 resolve_tb_generic_targets (gfc_symbol
* super_type
,
13440 gfc_typebound_proc
* p
, const char* name
)
13442 gfc_tbp_generic
* target
;
13443 gfc_symtree
* first_target
;
13444 gfc_symtree
* inherited
;
13446 gcc_assert (p
&& p
->is_generic
);
13448 /* Try to find the specific bindings for the symtrees in our target-list. */
13449 gcc_assert (p
->u
.generic
);
13450 for (target
= p
->u
.generic
; target
; target
= target
->next
)
13451 if (!target
->specific
)
13453 gfc_typebound_proc
* overridden_tbp
;
13454 gfc_tbp_generic
* g
;
13455 const char* target_name
;
13457 target_name
= target
->specific_st
->name
;
13459 /* Defined for this type directly. */
13460 if (target
->specific_st
->n
.tb
&& !target
->specific_st
->n
.tb
->error
)
13462 target
->specific
= target
->specific_st
->n
.tb
;
13463 goto specific_found
;
13466 /* Look for an inherited specific binding. */
13469 inherited
= gfc_find_typebound_proc (super_type
, NULL
, target_name
,
13474 gcc_assert (inherited
->n
.tb
);
13475 target
->specific
= inherited
->n
.tb
;
13476 goto specific_found
;
13480 gfc_error ("Undefined specific binding %qs as target of GENERIC %qs"
13481 " at %L", target_name
, name
, &p
->where
);
13484 /* Once we've found the specific binding, check it is not ambiguous with
13485 other specifics already found or inherited for the same GENERIC. */
13487 gcc_assert (target
->specific
);
13489 /* This must really be a specific binding! */
13490 if (target
->specific
->is_generic
)
13492 gfc_error ("GENERIC %qs at %L must target a specific binding,"
13493 " %qs is GENERIC, too", name
, &p
->where
, target_name
);
13497 /* Check those already resolved on this type directly. */
13498 for (g
= p
->u
.generic
; g
; g
= g
->next
)
13499 if (g
!= target
&& g
->specific
13500 && !check_generic_tbp_ambiguity (target
, g
, name
, p
->where
))
13503 /* Check for ambiguity with inherited specific targets. */
13504 for (overridden_tbp
= p
->overridden
; overridden_tbp
;
13505 overridden_tbp
= overridden_tbp
->overridden
)
13506 if (overridden_tbp
->is_generic
)
13508 for (g
= overridden_tbp
->u
.generic
; g
; g
= g
->next
)
13510 gcc_assert (g
->specific
);
13511 if (!check_generic_tbp_ambiguity (target
, g
, name
, p
->where
))
13517 /* If we attempt to "overwrite" a specific binding, this is an error. */
13518 if (p
->overridden
&& !p
->overridden
->is_generic
)
13520 gfc_error ("GENERIC %qs at %L cannot overwrite specific binding with"
13521 " the same name", name
, &p
->where
);
13525 /* Take the SUBROUTINE/FUNCTION attributes of the first specific target, as
13526 all must have the same attributes here. */
13527 first_target
= p
->u
.generic
->specific
->u
.specific
;
13528 gcc_assert (first_target
);
13529 p
->subroutine
= first_target
->n
.sym
->attr
.subroutine
;
13530 p
->function
= first_target
->n
.sym
->attr
.function
;
13536 /* Resolve a GENERIC procedure binding for a derived type. */
13539 resolve_typebound_generic (gfc_symbol
* derived
, gfc_symtree
* st
)
13541 gfc_symbol
* super_type
;
13543 /* Find the overridden binding if any. */
13544 st
->n
.tb
->overridden
= NULL
;
13545 super_type
= gfc_get_derived_super_type (derived
);
13548 gfc_symtree
* overridden
;
13549 overridden
= gfc_find_typebound_proc (super_type
, NULL
, st
->name
,
13552 if (overridden
&& overridden
->n
.tb
)
13553 st
->n
.tb
->overridden
= overridden
->n
.tb
;
13556 /* Resolve using worker function. */
13557 return resolve_tb_generic_targets (super_type
, st
->n
.tb
, st
->name
);
13561 /* Retrieve the target-procedure of an operator binding and do some checks in
13562 common for intrinsic and user-defined type-bound operators. */
13565 get_checked_tb_operator_target (gfc_tbp_generic
* target
, locus where
)
13567 gfc_symbol
* target_proc
;
13569 gcc_assert (target
->specific
&& !target
->specific
->is_generic
);
13570 target_proc
= target
->specific
->u
.specific
->n
.sym
;
13571 gcc_assert (target_proc
);
13573 /* F08:C468. All operator bindings must have a passed-object dummy argument. */
13574 if (target
->specific
->nopass
)
13576 gfc_error ("Type-bound operator at %L cannot be NOPASS", &where
);
13580 return target_proc
;
13584 /* Resolve a type-bound intrinsic operator. */
13587 resolve_typebound_intrinsic_op (gfc_symbol
* derived
, gfc_intrinsic_op op
,
13588 gfc_typebound_proc
* p
)
13590 gfc_symbol
* super_type
;
13591 gfc_tbp_generic
* target
;
13593 /* If there's already an error here, do nothing (but don't fail again). */
13597 /* Operators should always be GENERIC bindings. */
13598 gcc_assert (p
->is_generic
);
13600 /* Look for an overridden binding. */
13601 super_type
= gfc_get_derived_super_type (derived
);
13602 if (super_type
&& super_type
->f2k_derived
)
13603 p
->overridden
= gfc_find_typebound_intrinsic_op (super_type
, NULL
,
13606 p
->overridden
= NULL
;
13608 /* Resolve general GENERIC properties using worker function. */
13609 if (!resolve_tb_generic_targets (super_type
, p
, gfc_op2string(op
)))
13612 /* Check the targets to be procedures of correct interface. */
13613 for (target
= p
->u
.generic
; target
; target
= target
->next
)
13615 gfc_symbol
* target_proc
;
13617 target_proc
= get_checked_tb_operator_target (target
, p
->where
);
13621 if (!gfc_check_operator_interface (target_proc
, op
, p
->where
))
13624 /* Add target to non-typebound operator list. */
13625 if (!target
->specific
->deferred
&& !derived
->attr
.use_assoc
13626 && p
->access
!= ACCESS_PRIVATE
&& derived
->ns
== gfc_current_ns
)
13628 gfc_interface
*head
, *intr
;
13630 /* Preempt 'gfc_check_new_interface' for submodules, where the
13631 mechanism for handling module procedures winds up resolving
13632 operator interfaces twice and would otherwise cause an error. */
13633 for (intr
= derived
->ns
->op
[op
]; intr
; intr
= intr
->next
)
13634 if (intr
->sym
== target_proc
13635 && target_proc
->attr
.used_in_submodule
)
13638 if (!gfc_check_new_interface (derived
->ns
->op
[op
],
13639 target_proc
, p
->where
))
13641 head
= derived
->ns
->op
[op
];
13642 intr
= gfc_get_interface ();
13643 intr
->sym
= target_proc
;
13644 intr
->where
= p
->where
;
13646 derived
->ns
->op
[op
] = intr
;
13658 /* Resolve a type-bound user operator (tree-walker callback). */
13660 static gfc_symbol
* resolve_bindings_derived
;
13661 static bool resolve_bindings_result
;
13663 static bool check_uop_procedure (gfc_symbol
* sym
, locus where
);
13666 resolve_typebound_user_op (gfc_symtree
* stree
)
13668 gfc_symbol
* super_type
;
13669 gfc_tbp_generic
* target
;
13671 gcc_assert (stree
&& stree
->n
.tb
);
13673 if (stree
->n
.tb
->error
)
13676 /* Operators should always be GENERIC bindings. */
13677 gcc_assert (stree
->n
.tb
->is_generic
);
13679 /* Find overridden procedure, if any. */
13680 super_type
= gfc_get_derived_super_type (resolve_bindings_derived
);
13681 if (super_type
&& super_type
->f2k_derived
)
13683 gfc_symtree
* overridden
;
13684 overridden
= gfc_find_typebound_user_op (super_type
, NULL
,
13685 stree
->name
, true, NULL
);
13687 if (overridden
&& overridden
->n
.tb
)
13688 stree
->n
.tb
->overridden
= overridden
->n
.tb
;
13691 stree
->n
.tb
->overridden
= NULL
;
13693 /* Resolve basically using worker function. */
13694 if (!resolve_tb_generic_targets (super_type
, stree
->n
.tb
, stree
->name
))
13697 /* Check the targets to be functions of correct interface. */
13698 for (target
= stree
->n
.tb
->u
.generic
; target
; target
= target
->next
)
13700 gfc_symbol
* target_proc
;
13702 target_proc
= get_checked_tb_operator_target (target
, stree
->n
.tb
->where
);
13706 if (!check_uop_procedure (target_proc
, stree
->n
.tb
->where
))
13713 resolve_bindings_result
= false;
13714 stree
->n
.tb
->error
= 1;
13718 /* Resolve the type-bound procedures for a derived type. */
13721 resolve_typebound_procedure (gfc_symtree
* stree
)
13725 gfc_symbol
* me_arg
;
13726 gfc_symbol
* super_type
;
13727 gfc_component
* comp
;
13729 gcc_assert (stree
);
13731 /* Undefined specific symbol from GENERIC target definition. */
13735 if (stree
->n
.tb
->error
)
13738 /* If this is a GENERIC binding, use that routine. */
13739 if (stree
->n
.tb
->is_generic
)
13741 if (!resolve_typebound_generic (resolve_bindings_derived
, stree
))
13746 /* Get the target-procedure to check it. */
13747 gcc_assert (!stree
->n
.tb
->is_generic
);
13748 gcc_assert (stree
->n
.tb
->u
.specific
);
13749 proc
= stree
->n
.tb
->u
.specific
->n
.sym
;
13750 where
= stree
->n
.tb
->where
;
13752 /* Default access should already be resolved from the parser. */
13753 gcc_assert (stree
->n
.tb
->access
!= ACCESS_UNKNOWN
);
13755 if (stree
->n
.tb
->deferred
)
13757 if (!check_proc_interface (proc
, &where
))
13762 /* If proc has not been resolved at this point, proc->name may
13763 actually be a USE associated entity. See PR fortran/89647. */
13764 if (!proc
->resolved
13765 && proc
->attr
.function
== 0 && proc
->attr
.subroutine
== 0)
13768 gfc_find_symbol (proc
->name
, gfc_current_ns
->parent
, 1, &tmp
);
13769 if (tmp
&& tmp
->attr
.use_assoc
)
13771 proc
->module
= tmp
->module
;
13772 proc
->attr
.proc
= tmp
->attr
.proc
;
13773 proc
->attr
.function
= tmp
->attr
.function
;
13774 proc
->attr
.subroutine
= tmp
->attr
.subroutine
;
13775 proc
->attr
.use_assoc
= tmp
->attr
.use_assoc
;
13776 proc
->ts
= tmp
->ts
;
13777 proc
->result
= tmp
->result
;
13781 /* Check for F08:C465. */
13782 if ((!proc
->attr
.subroutine
&& !proc
->attr
.function
)
13783 || (proc
->attr
.proc
!= PROC_MODULE
13784 && proc
->attr
.if_source
!= IFSRC_IFBODY
)
13785 || proc
->attr
.abstract
)
13787 gfc_error ("%qs must be a module procedure or an external "
13788 "procedure with an explicit interface at %L",
13789 proc
->name
, &where
);
13794 stree
->n
.tb
->subroutine
= proc
->attr
.subroutine
;
13795 stree
->n
.tb
->function
= proc
->attr
.function
;
13797 /* Find the super-type of the current derived type. We could do this once and
13798 store in a global if speed is needed, but as long as not I believe this is
13799 more readable and clearer. */
13800 super_type
= gfc_get_derived_super_type (resolve_bindings_derived
);
13802 /* If PASS, resolve and check arguments if not already resolved / loaded
13803 from a .mod file. */
13804 if (!stree
->n
.tb
->nopass
&& stree
->n
.tb
->pass_arg_num
== 0)
13806 gfc_formal_arglist
*dummy_args
;
13808 dummy_args
= gfc_sym_get_dummy_args (proc
);
13809 if (stree
->n
.tb
->pass_arg
)
13811 gfc_formal_arglist
*i
;
13813 /* If an explicit passing argument name is given, walk the arg-list
13814 and look for it. */
13817 stree
->n
.tb
->pass_arg_num
= 1;
13818 for (i
= dummy_args
; i
; i
= i
->next
)
13820 if (!strcmp (i
->sym
->name
, stree
->n
.tb
->pass_arg
))
13825 ++stree
->n
.tb
->pass_arg_num
;
13830 gfc_error ("Procedure %qs with PASS(%s) at %L has no"
13832 proc
->name
, stree
->n
.tb
->pass_arg
, &where
,
13833 stree
->n
.tb
->pass_arg
);
13839 /* Otherwise, take the first one; there should in fact be at least
13841 stree
->n
.tb
->pass_arg_num
= 1;
13844 gfc_error ("Procedure %qs with PASS at %L must have at"
13845 " least one argument", proc
->name
, &where
);
13848 me_arg
= dummy_args
->sym
;
13851 /* Now check that the argument-type matches and the passed-object
13852 dummy argument is generally fine. */
13854 gcc_assert (me_arg
);
13856 if (me_arg
->ts
.type
!= BT_CLASS
)
13858 gfc_error ("Non-polymorphic passed-object dummy argument of %qs"
13859 " at %L", proc
->name
, &where
);
13863 if (CLASS_DATA (me_arg
)->ts
.u
.derived
13864 != resolve_bindings_derived
)
13866 gfc_error ("Argument %qs of %qs with PASS(%s) at %L must be of"
13867 " the derived-type %qs", me_arg
->name
, proc
->name
,
13868 me_arg
->name
, &where
, resolve_bindings_derived
->name
);
13872 gcc_assert (me_arg
->ts
.type
== BT_CLASS
);
13873 if (CLASS_DATA (me_arg
)->as
&& CLASS_DATA (me_arg
)->as
->rank
!= 0)
13875 gfc_error ("Passed-object dummy argument of %qs at %L must be"
13876 " scalar", proc
->name
, &where
);
13879 if (CLASS_DATA (me_arg
)->attr
.allocatable
)
13881 gfc_error ("Passed-object dummy argument of %qs at %L must not"
13882 " be ALLOCATABLE", proc
->name
, &where
);
13885 if (CLASS_DATA (me_arg
)->attr
.class_pointer
)
13887 gfc_error ("Passed-object dummy argument of %qs at %L must not"
13888 " be POINTER", proc
->name
, &where
);
13893 /* If we are extending some type, check that we don't override a procedure
13894 flagged NON_OVERRIDABLE. */
13895 stree
->n
.tb
->overridden
= NULL
;
13898 gfc_symtree
* overridden
;
13899 overridden
= gfc_find_typebound_proc (super_type
, NULL
,
13900 stree
->name
, true, NULL
);
13904 if (overridden
->n
.tb
)
13905 stree
->n
.tb
->overridden
= overridden
->n
.tb
;
13907 if (!gfc_check_typebound_override (stree
, overridden
))
13912 /* See if there's a name collision with a component directly in this type. */
13913 for (comp
= resolve_bindings_derived
->components
; comp
; comp
= comp
->next
)
13914 if (!strcmp (comp
->name
, stree
->name
))
13916 gfc_error ("Procedure %qs at %L has the same name as a component of"
13918 stree
->name
, &where
, resolve_bindings_derived
->name
);
13922 /* Try to find a name collision with an inherited component. */
13923 if (super_type
&& gfc_find_component (super_type
, stree
->name
, true, true,
13926 gfc_error ("Procedure %qs at %L has the same name as an inherited"
13927 " component of %qs",
13928 stree
->name
, &where
, resolve_bindings_derived
->name
);
13932 stree
->n
.tb
->error
= 0;
13936 resolve_bindings_result
= false;
13937 stree
->n
.tb
->error
= 1;
13942 resolve_typebound_procedures (gfc_symbol
* derived
)
13945 gfc_symbol
* super_type
;
13947 if (!derived
->f2k_derived
|| !derived
->f2k_derived
->tb_sym_root
)
13950 super_type
= gfc_get_derived_super_type (derived
);
13952 resolve_symbol (super_type
);
13954 resolve_bindings_derived
= derived
;
13955 resolve_bindings_result
= true;
13957 if (derived
->f2k_derived
->tb_sym_root
)
13958 gfc_traverse_symtree (derived
->f2k_derived
->tb_sym_root
,
13959 &resolve_typebound_procedure
);
13961 if (derived
->f2k_derived
->tb_uop_root
)
13962 gfc_traverse_symtree (derived
->f2k_derived
->tb_uop_root
,
13963 &resolve_typebound_user_op
);
13965 for (op
= 0; op
!= GFC_INTRINSIC_OPS
; ++op
)
13967 gfc_typebound_proc
* p
= derived
->f2k_derived
->tb_op
[op
];
13968 if (p
&& !resolve_typebound_intrinsic_op (derived
,
13969 (gfc_intrinsic_op
)op
, p
))
13970 resolve_bindings_result
= false;
13973 return resolve_bindings_result
;
13977 /* Add a derived type to the dt_list. The dt_list is used in trans-types.c
13978 to give all identical derived types the same backend_decl. */
13980 add_dt_to_dt_list (gfc_symbol
*derived
)
13982 if (!derived
->dt_next
)
13984 if (gfc_derived_types
)
13986 derived
->dt_next
= gfc_derived_types
->dt_next
;
13987 gfc_derived_types
->dt_next
= derived
;
13991 derived
->dt_next
= derived
;
13993 gfc_derived_types
= derived
;
13998 /* Ensure that a derived-type is really not abstract, meaning that every
13999 inherited DEFERRED binding is overridden by a non-DEFERRED one. */
14002 ensure_not_abstract_walker (gfc_symbol
* sub
, gfc_symtree
* st
)
14007 if (!ensure_not_abstract_walker (sub
, st
->left
))
14009 if (!ensure_not_abstract_walker (sub
, st
->right
))
14012 if (st
->n
.tb
&& st
->n
.tb
->deferred
)
14014 gfc_symtree
* overriding
;
14015 overriding
= gfc_find_typebound_proc (sub
, NULL
, st
->name
, true, NULL
);
14018 gcc_assert (overriding
->n
.tb
);
14019 if (overriding
->n
.tb
->deferred
)
14021 gfc_error ("Derived-type %qs declared at %L must be ABSTRACT because"
14022 " %qs is DEFERRED and not overridden",
14023 sub
->name
, &sub
->declared_at
, st
->name
);
14032 ensure_not_abstract (gfc_symbol
* sub
, gfc_symbol
* ancestor
)
14034 /* The algorithm used here is to recursively travel up the ancestry of sub
14035 and for each ancestor-type, check all bindings. If any of them is
14036 DEFERRED, look it up starting from sub and see if the found (overriding)
14037 binding is not DEFERRED.
14038 This is not the most efficient way to do this, but it should be ok and is
14039 clearer than something sophisticated. */
14041 gcc_assert (ancestor
&& !sub
->attr
.abstract
);
14043 if (!ancestor
->attr
.abstract
)
14046 /* Walk bindings of this ancestor. */
14047 if (ancestor
->f2k_derived
)
14050 t
= ensure_not_abstract_walker (sub
, ancestor
->f2k_derived
->tb_sym_root
);
14055 /* Find next ancestor type and recurse on it. */
14056 ancestor
= gfc_get_derived_super_type (ancestor
);
14058 return ensure_not_abstract (sub
, ancestor
);
14064 /* This check for typebound defined assignments is done recursively
14065 since the order in which derived types are resolved is not always in
14066 order of the declarations. */
14069 check_defined_assignments (gfc_symbol
*derived
)
14073 for (c
= derived
->components
; c
; c
= c
->next
)
14075 if (!gfc_bt_struct (c
->ts
.type
)
14077 || c
->attr
.allocatable
14078 || c
->attr
.proc_pointer_comp
14079 || c
->attr
.class_pointer
14080 || c
->attr
.proc_pointer
)
14083 if (c
->ts
.u
.derived
->attr
.defined_assign_comp
14084 || (c
->ts
.u
.derived
->f2k_derived
14085 && c
->ts
.u
.derived
->f2k_derived
->tb_op
[INTRINSIC_ASSIGN
]))
14087 derived
->attr
.defined_assign_comp
= 1;
14091 check_defined_assignments (c
->ts
.u
.derived
);
14092 if (c
->ts
.u
.derived
->attr
.defined_assign_comp
)
14094 derived
->attr
.defined_assign_comp
= 1;
14101 /* Resolve a single component of a derived type or structure. */
14104 resolve_component (gfc_component
*c
, gfc_symbol
*sym
)
14106 gfc_symbol
*super_type
;
14107 symbol_attribute
*attr
;
14109 if (c
->attr
.artificial
)
14112 /* Do not allow vtype components to be resolved in nameless namespaces
14113 such as block data because the procedure pointers will cause ICEs
14114 and vtables are not needed in these contexts. */
14115 if (sym
->attr
.vtype
&& sym
->attr
.use_assoc
14116 && sym
->ns
->proc_name
== NULL
)
14120 if ((!sym
->attr
.is_class
|| c
!= sym
->components
)
14121 && c
->attr
.codimension
14122 && (!c
->attr
.allocatable
|| (c
->as
&& c
->as
->type
!= AS_DEFERRED
)))
14124 gfc_error ("Coarray component %qs at %L must be allocatable with "
14125 "deferred shape", c
->name
, &c
->loc
);
14130 if (c
->attr
.codimension
&& c
->ts
.type
== BT_DERIVED
14131 && c
->ts
.u
.derived
->ts
.is_iso_c
)
14133 gfc_error ("Component %qs at %L of TYPE(C_PTR) or TYPE(C_FUNPTR) "
14134 "shall not be a coarray", c
->name
, &c
->loc
);
14139 if (gfc_bt_struct (c
->ts
.type
) && c
->ts
.u
.derived
->attr
.coarray_comp
14140 && (c
->attr
.codimension
|| c
->attr
.pointer
|| c
->attr
.dimension
14141 || c
->attr
.allocatable
))
14143 gfc_error ("Component %qs at %L with coarray component "
14144 "shall be a nonpointer, nonallocatable scalar",
14150 if (c
->ts
.type
== BT_CLASS
)
14152 if (CLASS_DATA (c
))
14154 attr
= &(CLASS_DATA (c
)->attr
);
14156 /* Fix up contiguous attribute. */
14157 if (c
->attr
.contiguous
)
14158 attr
->contiguous
= 1;
14166 if (attr
&& attr
->contiguous
&& (!attr
->dimension
|| !attr
->pointer
))
14168 gfc_error ("Component %qs at %L has the CONTIGUOUS attribute but "
14169 "is not an array pointer", c
->name
, &c
->loc
);
14173 /* F2003, 15.2.1 - length has to be one. */
14174 if (sym
->attr
.is_bind_c
&& c
->ts
.type
== BT_CHARACTER
14175 && (c
->ts
.u
.cl
== NULL
|| c
->ts
.u
.cl
->length
== NULL
14176 || !gfc_is_constant_expr (c
->ts
.u
.cl
->length
)
14177 || mpz_cmp_si (c
->ts
.u
.cl
->length
->value
.integer
, 1) != 0))
14179 gfc_error ("Component %qs of BIND(C) type at %L must have length one",
14184 if (c
->attr
.proc_pointer
&& c
->ts
.interface
)
14186 gfc_symbol
*ifc
= c
->ts
.interface
;
14188 if (!sym
->attr
.vtype
&& !check_proc_interface (ifc
, &c
->loc
))
14194 if (ifc
->attr
.if_source
|| ifc
->attr
.intrinsic
)
14196 /* Resolve interface and copy attributes. */
14197 if (ifc
->formal
&& !ifc
->formal_ns
)
14198 resolve_symbol (ifc
);
14199 if (ifc
->attr
.intrinsic
)
14200 gfc_resolve_intrinsic (ifc
, &ifc
->declared_at
);
14204 c
->ts
= ifc
->result
->ts
;
14205 c
->attr
.allocatable
= ifc
->result
->attr
.allocatable
;
14206 c
->attr
.pointer
= ifc
->result
->attr
.pointer
;
14207 c
->attr
.dimension
= ifc
->result
->attr
.dimension
;
14208 c
->as
= gfc_copy_array_spec (ifc
->result
->as
);
14209 c
->attr
.class_ok
= ifc
->result
->attr
.class_ok
;
14214 c
->attr
.allocatable
= ifc
->attr
.allocatable
;
14215 c
->attr
.pointer
= ifc
->attr
.pointer
;
14216 c
->attr
.dimension
= ifc
->attr
.dimension
;
14217 c
->as
= gfc_copy_array_spec (ifc
->as
);
14218 c
->attr
.class_ok
= ifc
->attr
.class_ok
;
14220 c
->ts
.interface
= ifc
;
14221 c
->attr
.function
= ifc
->attr
.function
;
14222 c
->attr
.subroutine
= ifc
->attr
.subroutine
;
14224 c
->attr
.pure
= ifc
->attr
.pure
;
14225 c
->attr
.elemental
= ifc
->attr
.elemental
;
14226 c
->attr
.recursive
= ifc
->attr
.recursive
;
14227 c
->attr
.always_explicit
= ifc
->attr
.always_explicit
;
14228 c
->attr
.ext_attr
|= ifc
->attr
.ext_attr
;
14229 /* Copy char length. */
14230 if (ifc
->ts
.type
== BT_CHARACTER
&& ifc
->ts
.u
.cl
)
14232 gfc_charlen
*cl
= gfc_new_charlen (sym
->ns
, ifc
->ts
.u
.cl
);
14233 if (cl
->length
&& !cl
->resolved
14234 && !gfc_resolve_expr (cl
->length
))
14243 else if (c
->attr
.proc_pointer
&& c
->ts
.type
== BT_UNKNOWN
)
14245 /* Since PPCs are not implicitly typed, a PPC without an explicit
14246 interface must be a subroutine. */
14247 gfc_add_subroutine (&c
->attr
, c
->name
, &c
->loc
);
14250 /* Procedure pointer components: Check PASS arg. */
14251 if (c
->attr
.proc_pointer
&& !c
->tb
->nopass
&& c
->tb
->pass_arg_num
== 0
14252 && !sym
->attr
.vtype
)
14254 gfc_symbol
* me_arg
;
14256 if (c
->tb
->pass_arg
)
14258 gfc_formal_arglist
* i
;
14260 /* If an explicit passing argument name is given, walk the arg-list
14261 and look for it. */
14264 c
->tb
->pass_arg_num
= 1;
14265 for (i
= c
->ts
.interface
->formal
; i
; i
= i
->next
)
14267 if (!strcmp (i
->sym
->name
, c
->tb
->pass_arg
))
14272 c
->tb
->pass_arg_num
++;
14277 gfc_error ("Procedure pointer component %qs with PASS(%s) "
14278 "at %L has no argument %qs", c
->name
,
14279 c
->tb
->pass_arg
, &c
->loc
, c
->tb
->pass_arg
);
14286 /* Otherwise, take the first one; there should in fact be at least
14288 c
->tb
->pass_arg_num
= 1;
14289 if (!c
->ts
.interface
->formal
)
14291 gfc_error ("Procedure pointer component %qs with PASS at %L "
14292 "must have at least one argument",
14297 me_arg
= c
->ts
.interface
->formal
->sym
;
14300 /* Now check that the argument-type matches. */
14301 gcc_assert (me_arg
);
14302 if ((me_arg
->ts
.type
!= BT_DERIVED
&& me_arg
->ts
.type
!= BT_CLASS
)
14303 || (me_arg
->ts
.type
== BT_DERIVED
&& me_arg
->ts
.u
.derived
!= sym
)
14304 || (me_arg
->ts
.type
== BT_CLASS
14305 && CLASS_DATA (me_arg
)->ts
.u
.derived
!= sym
))
14307 gfc_error ("Argument %qs of %qs with PASS(%s) at %L must be of"
14308 " the derived type %qs", me_arg
->name
, c
->name
,
14309 me_arg
->name
, &c
->loc
, sym
->name
);
14314 /* Check for F03:C453. */
14315 if (CLASS_DATA (me_arg
)->attr
.dimension
)
14317 gfc_error ("Argument %qs of %qs with PASS(%s) at %L "
14318 "must be scalar", me_arg
->name
, c
->name
, me_arg
->name
,
14324 if (CLASS_DATA (me_arg
)->attr
.class_pointer
)
14326 gfc_error ("Argument %qs of %qs with PASS(%s) at %L "
14327 "may not have the POINTER attribute", me_arg
->name
,
14328 c
->name
, me_arg
->name
, &c
->loc
);
14333 if (CLASS_DATA (me_arg
)->attr
.allocatable
)
14335 gfc_error ("Argument %qs of %qs with PASS(%s) at %L "
14336 "may not be ALLOCATABLE", me_arg
->name
, c
->name
,
14337 me_arg
->name
, &c
->loc
);
14342 if (gfc_type_is_extensible (sym
) && me_arg
->ts
.type
!= BT_CLASS
)
14344 gfc_error ("Non-polymorphic passed-object dummy argument of %qs"
14345 " at %L", c
->name
, &c
->loc
);
14351 /* Check type-spec if this is not the parent-type component. */
14352 if (((sym
->attr
.is_class
14353 && (!sym
->components
->ts
.u
.derived
->attr
.extension
14354 || c
!= sym
->components
->ts
.u
.derived
->components
))
14355 || (!sym
->attr
.is_class
14356 && (!sym
->attr
.extension
|| c
!= sym
->components
)))
14357 && !sym
->attr
.vtype
14358 && !resolve_typespec_used (&c
->ts
, &c
->loc
, c
->name
))
14361 super_type
= gfc_get_derived_super_type (sym
);
14363 /* If this type is an extension, set the accessibility of the parent
14366 && ((sym
->attr
.is_class
14367 && c
== sym
->components
->ts
.u
.derived
->components
)
14368 || (!sym
->attr
.is_class
&& c
== sym
->components
))
14369 && strcmp (super_type
->name
, c
->name
) == 0)
14370 c
->attr
.access
= super_type
->attr
.access
;
14372 /* If this type is an extension, see if this component has the same name
14373 as an inherited type-bound procedure. */
14374 if (super_type
&& !sym
->attr
.is_class
14375 && gfc_find_typebound_proc (super_type
, NULL
, c
->name
, true, NULL
))
14377 gfc_error ("Component %qs of %qs at %L has the same name as an"
14378 " inherited type-bound procedure",
14379 c
->name
, sym
->name
, &c
->loc
);
14383 if (c
->ts
.type
== BT_CHARACTER
&& !c
->attr
.proc_pointer
14384 && !c
->ts
.deferred
)
14386 if (c
->ts
.u
.cl
->length
== NULL
14387 || (!resolve_charlen(c
->ts
.u
.cl
))
14388 || !gfc_is_constant_expr (c
->ts
.u
.cl
->length
))
14390 gfc_error ("Character length of component %qs needs to "
14391 "be a constant specification expression at %L",
14393 c
->ts
.u
.cl
->length
? &c
->ts
.u
.cl
->length
->where
: &c
->loc
);
14398 if (c
->ts
.type
== BT_CHARACTER
&& c
->ts
.deferred
14399 && !c
->attr
.pointer
&& !c
->attr
.allocatable
)
14401 gfc_error ("Character component %qs of %qs at %L with deferred "
14402 "length must be a POINTER or ALLOCATABLE",
14403 c
->name
, sym
->name
, &c
->loc
);
14407 /* Add the hidden deferred length field. */
14408 if (c
->ts
.type
== BT_CHARACTER
14409 && (c
->ts
.deferred
|| c
->attr
.pdt_string
)
14410 && !c
->attr
.function
14411 && !sym
->attr
.is_class
)
14413 char name
[GFC_MAX_SYMBOL_LEN
+9];
14414 gfc_component
*strlen
;
14415 sprintf (name
, "_%s_length", c
->name
);
14416 strlen
= gfc_find_component (sym
, name
, true, true, NULL
);
14417 if (strlen
== NULL
)
14419 if (!gfc_add_component (sym
, name
, &strlen
))
14421 strlen
->ts
.type
= BT_INTEGER
;
14422 strlen
->ts
.kind
= gfc_charlen_int_kind
;
14423 strlen
->attr
.access
= ACCESS_PRIVATE
;
14424 strlen
->attr
.artificial
= 1;
14428 if (c
->ts
.type
== BT_DERIVED
14429 && sym
->component_access
!= ACCESS_PRIVATE
14430 && gfc_check_symbol_access (sym
)
14431 && !is_sym_host_assoc (c
->ts
.u
.derived
, sym
->ns
)
14432 && !c
->ts
.u
.derived
->attr
.use_assoc
14433 && !gfc_check_symbol_access (c
->ts
.u
.derived
)
14434 && !gfc_notify_std (GFC_STD_F2003
, "the component %qs is a "
14435 "PRIVATE type and cannot be a component of "
14436 "%qs, which is PUBLIC at %L", c
->name
,
14437 sym
->name
, &sym
->declared_at
))
14440 if ((sym
->attr
.sequence
|| sym
->attr
.is_bind_c
) && c
->ts
.type
== BT_CLASS
)
14442 gfc_error ("Polymorphic component %s at %L in SEQUENCE or BIND(C) "
14443 "type %s", c
->name
, &c
->loc
, sym
->name
);
14447 if (sym
->attr
.sequence
)
14449 if (c
->ts
.type
== BT_DERIVED
&& c
->ts
.u
.derived
->attr
.sequence
== 0)
14451 gfc_error ("Component %s of SEQUENCE type declared at %L does "
14452 "not have the SEQUENCE attribute",
14453 c
->ts
.u
.derived
->name
, &sym
->declared_at
);
14458 if (c
->ts
.type
== BT_DERIVED
&& c
->ts
.u
.derived
->attr
.generic
)
14459 c
->ts
.u
.derived
= gfc_find_dt_in_generic (c
->ts
.u
.derived
);
14460 else if (c
->ts
.type
== BT_CLASS
&& c
->attr
.class_ok
14461 && CLASS_DATA (c
)->ts
.u
.derived
->attr
.generic
)
14462 CLASS_DATA (c
)->ts
.u
.derived
14463 = gfc_find_dt_in_generic (CLASS_DATA (c
)->ts
.u
.derived
);
14465 /* If an allocatable component derived type is of the same type as
14466 the enclosing derived type, we need a vtable generating so that
14467 the __deallocate procedure is created. */
14468 if ((c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
14469 && c
->ts
.u
.derived
== sym
&& c
->attr
.allocatable
== 1)
14470 gfc_find_vtab (&c
->ts
);
14472 /* Ensure that all the derived type components are put on the
14473 derived type list; even in formal namespaces, where derived type
14474 pointer components might not have been declared. */
14475 if (c
->ts
.type
== BT_DERIVED
14477 && c
->ts
.u
.derived
->components
14479 && sym
!= c
->ts
.u
.derived
)
14480 add_dt_to_dt_list (c
->ts
.u
.derived
);
14482 if (!gfc_resolve_array_spec (c
->as
,
14483 !(c
->attr
.pointer
|| c
->attr
.proc_pointer
14484 || c
->attr
.allocatable
)))
14487 if (c
->initializer
&& !sym
->attr
.vtype
14488 && !c
->attr
.pdt_kind
&& !c
->attr
.pdt_len
14489 && !gfc_check_assign_symbol (sym
, c
, c
->initializer
))
14496 /* Be nice about the locus for a structure expression - show the locus of the
14497 first non-null sub-expression if we can. */
14500 cons_where (gfc_expr
*struct_expr
)
14502 gfc_constructor
*cons
;
14504 gcc_assert (struct_expr
&& struct_expr
->expr_type
== EXPR_STRUCTURE
);
14506 cons
= gfc_constructor_first (struct_expr
->value
.constructor
);
14507 for (; cons
; cons
= gfc_constructor_next (cons
))
14509 if (cons
->expr
&& cons
->expr
->expr_type
!= EXPR_NULL
)
14510 return &cons
->expr
->where
;
14513 return &struct_expr
->where
;
14516 /* Resolve the components of a structure type. Much less work than derived
14520 resolve_fl_struct (gfc_symbol
*sym
)
14523 gfc_expr
*init
= NULL
;
14526 /* Make sure UNIONs do not have overlapping initializers. */
14527 if (sym
->attr
.flavor
== FL_UNION
)
14529 for (c
= sym
->components
; c
; c
= c
->next
)
14531 if (init
&& c
->initializer
)
14533 gfc_error ("Conflicting initializers in union at %L and %L",
14534 cons_where (init
), cons_where (c
->initializer
));
14535 gfc_free_expr (c
->initializer
);
14536 c
->initializer
= NULL
;
14539 init
= c
->initializer
;
14544 for (c
= sym
->components
; c
; c
= c
->next
)
14545 if (!resolve_component (c
, sym
))
14551 if (sym
->components
)
14552 add_dt_to_dt_list (sym
);
14558 /* Resolve the components of a derived type. This does not have to wait until
14559 resolution stage, but can be done as soon as the dt declaration has been
14563 resolve_fl_derived0 (gfc_symbol
*sym
)
14565 gfc_symbol
* super_type
;
14567 gfc_formal_arglist
*f
;
14570 if (sym
->attr
.unlimited_polymorphic
)
14573 super_type
= gfc_get_derived_super_type (sym
);
14576 if (super_type
&& sym
->attr
.coarray_comp
&& !super_type
->attr
.coarray_comp
)
14578 gfc_error ("As extending type %qs at %L has a coarray component, "
14579 "parent type %qs shall also have one", sym
->name
,
14580 &sym
->declared_at
, super_type
->name
);
14584 /* Ensure the extended type gets resolved before we do. */
14585 if (super_type
&& !resolve_fl_derived0 (super_type
))
14588 /* An ABSTRACT type must be extensible. */
14589 if (sym
->attr
.abstract
&& !gfc_type_is_extensible (sym
))
14591 gfc_error ("Non-extensible derived-type %qs at %L must not be ABSTRACT",
14592 sym
->name
, &sym
->declared_at
);
14596 c
= (sym
->attr
.is_class
) ? sym
->components
->ts
.u
.derived
->components
14600 for ( ; c
!= NULL
; c
= c
->next
)
14601 if (!resolve_component (c
, sym
))
14607 /* Now add the caf token field, where needed. */
14608 if (flag_coarray
!= GFC_FCOARRAY_NONE
14609 && !sym
->attr
.is_class
&& !sym
->attr
.vtype
)
14611 for (c
= sym
->components
; c
; c
= c
->next
)
14612 if (!c
->attr
.dimension
&& !c
->attr
.codimension
14613 && (c
->attr
.allocatable
|| c
->attr
.pointer
))
14615 char name
[GFC_MAX_SYMBOL_LEN
+9];
14616 gfc_component
*token
;
14617 sprintf (name
, "_caf_%s", c
->name
);
14618 token
= gfc_find_component (sym
, name
, true, true, NULL
);
14621 if (!gfc_add_component (sym
, name
, &token
))
14623 token
->ts
.type
= BT_VOID
;
14624 token
->ts
.kind
= gfc_default_integer_kind
;
14625 token
->attr
.access
= ACCESS_PRIVATE
;
14626 token
->attr
.artificial
= 1;
14627 token
->attr
.caf_token
= 1;
14632 check_defined_assignments (sym
);
14634 if (!sym
->attr
.defined_assign_comp
&& super_type
)
14635 sym
->attr
.defined_assign_comp
14636 = super_type
->attr
.defined_assign_comp
;
14638 /* If this is a non-ABSTRACT type extending an ABSTRACT one, ensure that
14639 all DEFERRED bindings are overridden. */
14640 if (super_type
&& super_type
->attr
.abstract
&& !sym
->attr
.abstract
14641 && !sym
->attr
.is_class
14642 && !ensure_not_abstract (sym
, super_type
))
14645 /* Check that there is a component for every PDT parameter. */
14646 if (sym
->attr
.pdt_template
)
14648 for (f
= sym
->formal
; f
; f
= f
->next
)
14652 c
= gfc_find_component (sym
, f
->sym
->name
, true, true, NULL
);
14655 gfc_error ("Parameterized type %qs does not have a component "
14656 "corresponding to parameter %qs at %L", sym
->name
,
14657 f
->sym
->name
, &sym
->declared_at
);
14663 /* Add derived type to the derived type list. */
14664 add_dt_to_dt_list (sym
);
14670 /* The following procedure does the full resolution of a derived type,
14671 including resolution of all type-bound procedures (if present). In contrast
14672 to 'resolve_fl_derived0' this can only be done after the module has been
14673 parsed completely. */
14676 resolve_fl_derived (gfc_symbol
*sym
)
14678 gfc_symbol
*gen_dt
= NULL
;
14680 if (sym
->attr
.unlimited_polymorphic
)
14683 if (!sym
->attr
.is_class
)
14684 gfc_find_symbol (sym
->name
, sym
->ns
, 0, &gen_dt
);
14685 if (gen_dt
&& gen_dt
->generic
&& gen_dt
->generic
->next
14686 && (!gen_dt
->generic
->sym
->attr
.use_assoc
14687 || gen_dt
->generic
->sym
->module
!= gen_dt
->generic
->next
->sym
->module
)
14688 && !gfc_notify_std (GFC_STD_F2003
, "Generic name %qs of function "
14689 "%qs at %L being the same name as derived "
14690 "type at %L", sym
->name
,
14691 gen_dt
->generic
->sym
== sym
14692 ? gen_dt
->generic
->next
->sym
->name
14693 : gen_dt
->generic
->sym
->name
,
14694 gen_dt
->generic
->sym
== sym
14695 ? &gen_dt
->generic
->next
->sym
->declared_at
14696 : &gen_dt
->generic
->sym
->declared_at
,
14697 &sym
->declared_at
))
14700 if (sym
->components
== NULL
&& !sym
->attr
.zero_comp
&& !sym
->attr
.use_assoc
)
14702 gfc_error ("Derived type %qs at %L has not been declared",
14703 sym
->name
, &sym
->declared_at
);
14707 /* Resolve the finalizer procedures. */
14708 if (!gfc_resolve_finalizers (sym
, NULL
))
14711 if (sym
->attr
.is_class
&& sym
->ts
.u
.derived
== NULL
)
14713 /* Fix up incomplete CLASS symbols. */
14714 gfc_component
*data
= gfc_find_component (sym
, "_data", true, true, NULL
);
14715 gfc_component
*vptr
= gfc_find_component (sym
, "_vptr", true, true, NULL
);
14717 /* Nothing more to do for unlimited polymorphic entities. */
14718 if (data
->ts
.u
.derived
->attr
.unlimited_polymorphic
)
14720 else if (vptr
->ts
.u
.derived
== NULL
)
14722 gfc_symbol
*vtab
= gfc_find_derived_vtab (data
->ts
.u
.derived
);
14724 vptr
->ts
.u
.derived
= vtab
->ts
.u
.derived
;
14725 if (!resolve_fl_derived0 (vptr
->ts
.u
.derived
))
14730 if (!resolve_fl_derived0 (sym
))
14733 /* Resolve the type-bound procedures. */
14734 if (!resolve_typebound_procedures (sym
))
14737 /* Generate module vtables subject to their accessibility and their not
14738 being vtables or pdt templates. If this is not done class declarations
14739 in external procedures wind up with their own version and so SELECT TYPE
14740 fails because the vptrs do not have the same address. */
14741 if (gfc_option
.allow_std
& GFC_STD_F2003
14742 && sym
->ns
->proc_name
14743 && sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
14744 && sym
->attr
.access
!= ACCESS_PRIVATE
14745 && !(sym
->attr
.use_assoc
|| sym
->attr
.vtype
|| sym
->attr
.pdt_template
))
14747 gfc_symbol
*vtab
= gfc_find_derived_vtab (sym
);
14748 gfc_set_sym_referenced (vtab
);
14756 resolve_fl_namelist (gfc_symbol
*sym
)
14761 for (nl
= sym
->namelist
; nl
; nl
= nl
->next
)
14763 /* Check again, the check in match only works if NAMELIST comes
14765 if (nl
->sym
->as
&& nl
->sym
->as
->type
== AS_ASSUMED_SIZE
)
14767 gfc_error ("Assumed size array %qs in namelist %qs at %L is not "
14768 "allowed", nl
->sym
->name
, sym
->name
, &sym
->declared_at
);
14772 if (nl
->sym
->as
&& nl
->sym
->as
->type
== AS_ASSUMED_SHAPE
14773 && !gfc_notify_std (GFC_STD_F2003
, "NAMELIST array object %qs "
14774 "with assumed shape in namelist %qs at %L",
14775 nl
->sym
->name
, sym
->name
, &sym
->declared_at
))
14778 if (is_non_constant_shape_array (nl
->sym
)
14779 && !gfc_notify_std (GFC_STD_F2003
, "NAMELIST array object %qs "
14780 "with nonconstant shape in namelist %qs at %L",
14781 nl
->sym
->name
, sym
->name
, &sym
->declared_at
))
14784 if (nl
->sym
->ts
.type
== BT_CHARACTER
14785 && (nl
->sym
->ts
.u
.cl
->length
== NULL
14786 || !gfc_is_constant_expr (nl
->sym
->ts
.u
.cl
->length
))
14787 && !gfc_notify_std (GFC_STD_F2003
, "NAMELIST object %qs with "
14788 "nonconstant character length in "
14789 "namelist %qs at %L", nl
->sym
->name
,
14790 sym
->name
, &sym
->declared_at
))
14795 /* Reject PRIVATE objects in a PUBLIC namelist. */
14796 if (gfc_check_symbol_access (sym
))
14798 for (nl
= sym
->namelist
; nl
; nl
= nl
->next
)
14800 if (!nl
->sym
->attr
.use_assoc
14801 && !is_sym_host_assoc (nl
->sym
, sym
->ns
)
14802 && !gfc_check_symbol_access (nl
->sym
))
14804 gfc_error ("NAMELIST object %qs was declared PRIVATE and "
14805 "cannot be member of PUBLIC namelist %qs at %L",
14806 nl
->sym
->name
, sym
->name
, &sym
->declared_at
);
14810 if (nl
->sym
->ts
.type
== BT_DERIVED
14811 && (nl
->sym
->ts
.u
.derived
->attr
.alloc_comp
14812 || nl
->sym
->ts
.u
.derived
->attr
.pointer_comp
))
14814 if (!gfc_notify_std (GFC_STD_F2003
, "NAMELIST object %qs in "
14815 "namelist %qs at %L with ALLOCATABLE "
14816 "or POINTER components", nl
->sym
->name
,
14817 sym
->name
, &sym
->declared_at
))
14822 /* Types with private components that came here by USE-association. */
14823 if (nl
->sym
->ts
.type
== BT_DERIVED
14824 && derived_inaccessible (nl
->sym
->ts
.u
.derived
))
14826 gfc_error ("NAMELIST object %qs has use-associated PRIVATE "
14827 "components and cannot be member of namelist %qs at %L",
14828 nl
->sym
->name
, sym
->name
, &sym
->declared_at
);
14832 /* Types with private components that are defined in the same module. */
14833 if (nl
->sym
->ts
.type
== BT_DERIVED
14834 && !is_sym_host_assoc (nl
->sym
->ts
.u
.derived
, sym
->ns
)
14835 && nl
->sym
->ts
.u
.derived
->attr
.private_comp
)
14837 gfc_error ("NAMELIST object %qs has PRIVATE components and "
14838 "cannot be a member of PUBLIC namelist %qs at %L",
14839 nl
->sym
->name
, sym
->name
, &sym
->declared_at
);
14846 /* 14.1.2 A module or internal procedure represent local entities
14847 of the same type as a namelist member and so are not allowed. */
14848 for (nl
= sym
->namelist
; nl
; nl
= nl
->next
)
14850 if (nl
->sym
->ts
.kind
!= 0 && nl
->sym
->attr
.flavor
== FL_VARIABLE
)
14853 if (nl
->sym
->attr
.function
&& nl
->sym
== nl
->sym
->result
)
14854 if ((nl
->sym
== sym
->ns
->proc_name
)
14856 (sym
->ns
->parent
&& nl
->sym
== sym
->ns
->parent
->proc_name
))
14861 gfc_find_symbol (nl
->sym
->name
, sym
->ns
, 1, &nlsym
);
14862 if (nlsym
&& nlsym
->attr
.flavor
== FL_PROCEDURE
)
14864 gfc_error ("PROCEDURE attribute conflicts with NAMELIST "
14865 "attribute in %qs at %L", nlsym
->name
,
14866 &sym
->declared_at
);
14873 for (nl
= sym
->namelist
; nl
; nl
= nl
->next
)
14874 nl
->sym
->attr
.asynchronous
= 1;
14881 resolve_fl_parameter (gfc_symbol
*sym
)
14883 /* A parameter array's shape needs to be constant. */
14884 if (sym
->as
!= NULL
14885 && (sym
->as
->type
== AS_DEFERRED
14886 || is_non_constant_shape_array (sym
)))
14888 gfc_error ("Parameter array %qs at %L cannot be automatic "
14889 "or of deferred shape", sym
->name
, &sym
->declared_at
);
14893 /* Constraints on deferred type parameter. */
14894 if (!deferred_requirements (sym
))
14897 /* Make sure a parameter that has been implicitly typed still
14898 matches the implicit type, since PARAMETER statements can precede
14899 IMPLICIT statements. */
14900 if (sym
->attr
.implicit_type
14901 && !gfc_compare_types (&sym
->ts
, gfc_get_default_type (sym
->name
,
14904 gfc_error ("Implicitly typed PARAMETER %qs at %L doesn't match a "
14905 "later IMPLICIT type", sym
->name
, &sym
->declared_at
);
14909 /* Make sure the types of derived parameters are consistent. This
14910 type checking is deferred until resolution because the type may
14911 refer to a derived type from the host. */
14912 if (sym
->ts
.type
== BT_DERIVED
14913 && !gfc_compare_types (&sym
->ts
, &sym
->value
->ts
))
14915 gfc_error ("Incompatible derived type in PARAMETER at %L",
14916 &sym
->value
->where
);
14920 /* F03:C509,C514. */
14921 if (sym
->ts
.type
== BT_CLASS
)
14923 gfc_error ("CLASS variable %qs at %L cannot have the PARAMETER attribute",
14924 sym
->name
, &sym
->declared_at
);
14932 /* Called by resolve_symbol to check PDTs. */
14935 resolve_pdt (gfc_symbol
* sym
)
14937 gfc_symbol
*derived
= NULL
;
14938 gfc_actual_arglist
*param
;
14940 bool const_len_exprs
= true;
14941 bool assumed_len_exprs
= false;
14942 symbol_attribute
*attr
;
14944 if (sym
->ts
.type
== BT_DERIVED
)
14946 derived
= sym
->ts
.u
.derived
;
14947 attr
= &(sym
->attr
);
14949 else if (sym
->ts
.type
== BT_CLASS
)
14951 derived
= CLASS_DATA (sym
)->ts
.u
.derived
;
14952 attr
= &(CLASS_DATA (sym
)->attr
);
14955 gcc_unreachable ();
14957 gcc_assert (derived
->attr
.pdt_type
);
14959 for (param
= sym
->param_list
; param
; param
= param
->next
)
14961 c
= gfc_find_component (derived
, param
->name
, false, true, NULL
);
14963 if (c
->attr
.pdt_kind
)
14966 if (param
->expr
&& !gfc_is_constant_expr (param
->expr
)
14967 && c
->attr
.pdt_len
)
14968 const_len_exprs
= false;
14969 else if (param
->spec_type
== SPEC_ASSUMED
)
14970 assumed_len_exprs
= true;
14972 if (param
->spec_type
== SPEC_DEFERRED
14973 && !attr
->allocatable
&& !attr
->pointer
)
14974 gfc_error ("The object %qs at %L has a deferred LEN "
14975 "parameter %qs and is neither allocatable "
14976 "nor a pointer", sym
->name
, &sym
->declared_at
,
14981 if (!const_len_exprs
14982 && (sym
->ns
->proc_name
->attr
.is_main_program
14983 || sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
14984 || sym
->attr
.save
!= SAVE_NONE
))
14985 gfc_error ("The AUTOMATIC object %qs at %L must not have the "
14986 "SAVE attribute or be a variable declared in the "
14987 "main program, a module or a submodule(F08/C513)",
14988 sym
->name
, &sym
->declared_at
);
14990 if (assumed_len_exprs
&& !(sym
->attr
.dummy
14991 || sym
->attr
.select_type_temporary
|| sym
->attr
.associate_var
))
14992 gfc_error ("The object %qs at %L with ASSUMED type parameters "
14993 "must be a dummy or a SELECT TYPE selector(F08/4.2)",
14994 sym
->name
, &sym
->declared_at
);
14998 /* Do anything necessary to resolve a symbol. Right now, we just
14999 assume that an otherwise unknown symbol is a variable. This sort
15000 of thing commonly happens for symbols in module. */
15003 resolve_symbol (gfc_symbol
*sym
)
15005 int check_constant
, mp_flag
;
15006 gfc_symtree
*symtree
;
15007 gfc_symtree
*this_symtree
;
15010 symbol_attribute class_attr
;
15011 gfc_array_spec
*as
;
15012 bool saved_specification_expr
;
15018 /* No symbol will ever have union type; only components can be unions.
15019 Union type declaration symbols have type BT_UNKNOWN but flavor FL_UNION
15020 (just like derived type declaration symbols have flavor FL_DERIVED). */
15021 gcc_assert (sym
->ts
.type
!= BT_UNION
);
15023 /* Coarrayed polymorphic objects with allocatable or pointer components are
15024 yet unsupported for -fcoarray=lib. */
15025 if (flag_coarray
== GFC_FCOARRAY_LIB
&& sym
->ts
.type
== BT_CLASS
15026 && sym
->ts
.u
.derived
&& CLASS_DATA (sym
)
15027 && CLASS_DATA (sym
)->attr
.codimension
15028 && (CLASS_DATA (sym
)->ts
.u
.derived
->attr
.alloc_comp
15029 || CLASS_DATA (sym
)->ts
.u
.derived
->attr
.pointer_comp
))
15031 gfc_error ("Sorry, allocatable/pointer components in polymorphic (CLASS) "
15032 "type coarrays at %L are unsupported", &sym
->declared_at
);
15036 if (sym
->attr
.artificial
)
15039 if (sym
->attr
.unlimited_polymorphic
)
15042 if (sym
->attr
.flavor
== FL_UNKNOWN
15043 || (sym
->attr
.flavor
== FL_PROCEDURE
&& !sym
->attr
.intrinsic
15044 && !sym
->attr
.generic
&& !sym
->attr
.external
15045 && sym
->attr
.if_source
== IFSRC_UNKNOWN
15046 && sym
->ts
.type
== BT_UNKNOWN
))
15049 /* If we find that a flavorless symbol is an interface in one of the
15050 parent namespaces, find its symtree in this namespace, free the
15051 symbol and set the symtree to point to the interface symbol. */
15052 for (ns
= gfc_current_ns
->parent
; ns
; ns
= ns
->parent
)
15054 symtree
= gfc_find_symtree (ns
->sym_root
, sym
->name
);
15055 if (symtree
&& (symtree
->n
.sym
->generic
||
15056 (symtree
->n
.sym
->attr
.flavor
== FL_PROCEDURE
15057 && sym
->ns
->construct_entities
)))
15059 this_symtree
= gfc_find_symtree (gfc_current_ns
->sym_root
,
15061 if (this_symtree
->n
.sym
== sym
)
15063 symtree
->n
.sym
->refs
++;
15064 gfc_release_symbol (sym
);
15065 this_symtree
->n
.sym
= symtree
->n
.sym
;
15071 /* Otherwise give it a flavor according to such attributes as
15073 if (sym
->attr
.flavor
== FL_UNKNOWN
&& sym
->attr
.external
== 0
15074 && sym
->attr
.intrinsic
== 0)
15075 sym
->attr
.flavor
= FL_VARIABLE
;
15076 else if (sym
->attr
.flavor
== FL_UNKNOWN
)
15078 sym
->attr
.flavor
= FL_PROCEDURE
;
15079 if (sym
->attr
.dimension
)
15080 sym
->attr
.function
= 1;
15084 if (sym
->attr
.external
&& sym
->ts
.type
!= BT_UNKNOWN
&& !sym
->attr
.function
)
15085 gfc_add_function (&sym
->attr
, sym
->name
, &sym
->declared_at
);
15087 if (sym
->attr
.procedure
&& sym
->attr
.if_source
!= IFSRC_DECL
15088 && !resolve_procedure_interface (sym
))
15091 if (sym
->attr
.is_protected
&& !sym
->attr
.proc_pointer
15092 && (sym
->attr
.procedure
|| sym
->attr
.external
))
15094 if (sym
->attr
.external
)
15095 gfc_error ("PROTECTED attribute conflicts with EXTERNAL attribute "
15096 "at %L", &sym
->declared_at
);
15098 gfc_error ("PROCEDURE attribute conflicts with PROTECTED attribute "
15099 "at %L", &sym
->declared_at
);
15104 if (sym
->attr
.flavor
== FL_DERIVED
&& !resolve_fl_derived (sym
))
15107 else if ((sym
->attr
.flavor
== FL_STRUCT
|| sym
->attr
.flavor
== FL_UNION
)
15108 && !resolve_fl_struct (sym
))
15111 /* Symbols that are module procedures with results (functions) have
15112 the types and array specification copied for type checking in
15113 procedures that call them, as well as for saving to a module
15114 file. These symbols can't stand the scrutiny that their results
15116 mp_flag
= (sym
->result
!= NULL
&& sym
->result
!= sym
);
15118 /* Make sure that the intrinsic is consistent with its internal
15119 representation. This needs to be done before assigning a default
15120 type to avoid spurious warnings. */
15121 if (sym
->attr
.flavor
!= FL_MODULE
&& sym
->attr
.intrinsic
15122 && !gfc_resolve_intrinsic (sym
, &sym
->declared_at
))
15125 /* Resolve associate names. */
15127 resolve_assoc_var (sym
, true);
15129 /* Assign default type to symbols that need one and don't have one. */
15130 if (sym
->ts
.type
== BT_UNKNOWN
)
15132 if (sym
->attr
.flavor
== FL_VARIABLE
|| sym
->attr
.flavor
== FL_PARAMETER
)
15134 gfc_set_default_type (sym
, 1, NULL
);
15137 if (sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.external
15138 && !sym
->attr
.function
&& !sym
->attr
.subroutine
15139 && gfc_get_default_type (sym
->name
, sym
->ns
)->type
== BT_UNKNOWN
)
15140 gfc_add_subroutine (&sym
->attr
, sym
->name
, &sym
->declared_at
);
15142 if (sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.function
)
15144 /* The specific case of an external procedure should emit an error
15145 in the case that there is no implicit type. */
15148 if (!sym
->attr
.mixed_entry_master
)
15149 gfc_set_default_type (sym
, sym
->attr
.external
, NULL
);
15153 /* Result may be in another namespace. */
15154 resolve_symbol (sym
->result
);
15156 if (!sym
->result
->attr
.proc_pointer
)
15158 sym
->ts
= sym
->result
->ts
;
15159 sym
->as
= gfc_copy_array_spec (sym
->result
->as
);
15160 sym
->attr
.dimension
= sym
->result
->attr
.dimension
;
15161 sym
->attr
.pointer
= sym
->result
->attr
.pointer
;
15162 sym
->attr
.allocatable
= sym
->result
->attr
.allocatable
;
15163 sym
->attr
.contiguous
= sym
->result
->attr
.contiguous
;
15168 else if (mp_flag
&& sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.function
)
15170 bool saved_specification_expr
= specification_expr
;
15171 specification_expr
= true;
15172 gfc_resolve_array_spec (sym
->result
->as
, false);
15173 specification_expr
= saved_specification_expr
;
15176 if (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
)
15178 as
= CLASS_DATA (sym
)->as
;
15179 class_attr
= CLASS_DATA (sym
)->attr
;
15180 class_attr
.pointer
= class_attr
.class_pointer
;
15184 class_attr
= sym
->attr
;
15189 if (sym
->attr
.contiguous
15190 && (!class_attr
.dimension
15191 || (as
->type
!= AS_ASSUMED_SHAPE
&& as
->type
!= AS_ASSUMED_RANK
15192 && !class_attr
.pointer
)))
15194 gfc_error ("%qs at %L has the CONTIGUOUS attribute but is not an "
15195 "array pointer or an assumed-shape or assumed-rank array",
15196 sym
->name
, &sym
->declared_at
);
15200 /* Assumed size arrays and assumed shape arrays must be dummy
15201 arguments. Array-spec's of implied-shape should have been resolved to
15202 AS_EXPLICIT already. */
15206 /* If AS_IMPLIED_SHAPE makes it to here, it must be a bad
15207 specification expression. */
15208 if (as
->type
== AS_IMPLIED_SHAPE
)
15211 for (i
=0; i
<as
->rank
; i
++)
15213 if (as
->lower
[i
] != NULL
&& as
->upper
[i
] == NULL
)
15215 gfc_error ("Bad specification for assumed size array at %L",
15216 &as
->lower
[i
]->where
);
15223 if (((as
->type
== AS_ASSUMED_SIZE
&& !as
->cp_was_assumed
)
15224 || as
->type
== AS_ASSUMED_SHAPE
)
15225 && !sym
->attr
.dummy
&& !sym
->attr
.select_type_temporary
)
15227 if (as
->type
== AS_ASSUMED_SIZE
)
15228 gfc_error ("Assumed size array at %L must be a dummy argument",
15229 &sym
->declared_at
);
15231 gfc_error ("Assumed shape array at %L must be a dummy argument",
15232 &sym
->declared_at
);
15235 /* TS 29113, C535a. */
15236 if (as
->type
== AS_ASSUMED_RANK
&& !sym
->attr
.dummy
15237 && !sym
->attr
.select_type_temporary
15238 && !(cs_base
&& cs_base
->current
15239 && cs_base
->current
->op
== EXEC_SELECT_RANK
))
15241 gfc_error ("Assumed-rank array at %L must be a dummy argument",
15242 &sym
->declared_at
);
15245 if (as
->type
== AS_ASSUMED_RANK
15246 && (sym
->attr
.codimension
|| sym
->attr
.value
))
15248 gfc_error ("Assumed-rank array at %L may not have the VALUE or "
15249 "CODIMENSION attribute", &sym
->declared_at
);
15254 /* Make sure symbols with known intent or optional are really dummy
15255 variable. Because of ENTRY statement, this has to be deferred
15256 until resolution time. */
15258 if (!sym
->attr
.dummy
15259 && (sym
->attr
.optional
|| sym
->attr
.intent
!= INTENT_UNKNOWN
))
15261 gfc_error ("Symbol at %L is not a DUMMY variable", &sym
->declared_at
);
15265 if (sym
->attr
.value
&& !sym
->attr
.dummy
)
15267 gfc_error ("%qs at %L cannot have the VALUE attribute because "
15268 "it is not a dummy argument", sym
->name
, &sym
->declared_at
);
15272 if (sym
->attr
.value
&& sym
->ts
.type
== BT_CHARACTER
)
15274 gfc_charlen
*cl
= sym
->ts
.u
.cl
;
15275 if (!cl
|| !cl
->length
|| cl
->length
->expr_type
!= EXPR_CONSTANT
)
15277 gfc_error ("Character dummy variable %qs at %L with VALUE "
15278 "attribute must have constant length",
15279 sym
->name
, &sym
->declared_at
);
15283 if (sym
->ts
.is_c_interop
15284 && mpz_cmp_si (cl
->length
->value
.integer
, 1) != 0)
15286 gfc_error ("C interoperable character dummy variable %qs at %L "
15287 "with VALUE attribute must have length one",
15288 sym
->name
, &sym
->declared_at
);
15293 if (sym
->ts
.type
== BT_DERIVED
&& !sym
->attr
.is_iso_c
15294 && sym
->ts
.u
.derived
->attr
.generic
)
15296 sym
->ts
.u
.derived
= gfc_find_dt_in_generic (sym
->ts
.u
.derived
);
15297 if (!sym
->ts
.u
.derived
)
15299 gfc_error ("The derived type %qs at %L is of type %qs, "
15300 "which has not been defined", sym
->name
,
15301 &sym
->declared_at
, sym
->ts
.u
.derived
->name
);
15302 sym
->ts
.type
= BT_UNKNOWN
;
15307 /* Use the same constraints as TYPE(*), except for the type check
15308 and that only scalars and assumed-size arrays are permitted. */
15309 if (sym
->attr
.ext_attr
& (1 << EXT_ATTR_NO_ARG_CHECK
))
15311 if (!sym
->attr
.dummy
)
15313 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute shall be "
15314 "a dummy argument", sym
->name
, &sym
->declared_at
);
15318 if (sym
->ts
.type
!= BT_ASSUMED
&& sym
->ts
.type
!= BT_INTEGER
15319 && sym
->ts
.type
!= BT_REAL
&& sym
->ts
.type
!= BT_LOGICAL
15320 && sym
->ts
.type
!= BT_COMPLEX
)
15322 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute shall be "
15323 "of type TYPE(*) or of an numeric intrinsic type",
15324 sym
->name
, &sym
->declared_at
);
15328 if (sym
->attr
.allocatable
|| sym
->attr
.codimension
15329 || sym
->attr
.pointer
|| sym
->attr
.value
)
15331 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute may not "
15332 "have the ALLOCATABLE, CODIMENSION, POINTER or VALUE "
15333 "attribute", sym
->name
, &sym
->declared_at
);
15337 if (sym
->attr
.intent
== INTENT_OUT
)
15339 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute may not "
15340 "have the INTENT(OUT) attribute",
15341 sym
->name
, &sym
->declared_at
);
15344 if (sym
->attr
.dimension
&& sym
->as
->type
!= AS_ASSUMED_SIZE
)
15346 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute shall "
15347 "either be a scalar or an assumed-size array",
15348 sym
->name
, &sym
->declared_at
);
15352 /* Set the type to TYPE(*) and add a dimension(*) to ensure
15353 NO_ARG_CHECK is correctly handled in trans*.c, e.g. with
15355 sym
->ts
.type
= BT_ASSUMED
;
15356 sym
->as
= gfc_get_array_spec ();
15357 sym
->as
->type
= AS_ASSUMED_SIZE
;
15359 sym
->as
->lower
[0] = gfc_get_int_expr (gfc_default_integer_kind
, NULL
, 1);
15361 else if (sym
->ts
.type
== BT_ASSUMED
)
15363 /* TS 29113, C407a. */
15364 if (!sym
->attr
.dummy
)
15366 gfc_error ("Assumed type of variable %s at %L is only permitted "
15367 "for dummy variables", sym
->name
, &sym
->declared_at
);
15370 if (sym
->attr
.allocatable
|| sym
->attr
.codimension
15371 || sym
->attr
.pointer
|| sym
->attr
.value
)
15373 gfc_error ("Assumed-type variable %s at %L may not have the "
15374 "ALLOCATABLE, CODIMENSION, POINTER or VALUE attribute",
15375 sym
->name
, &sym
->declared_at
);
15378 if (sym
->attr
.intent
== INTENT_OUT
)
15380 gfc_error ("Assumed-type variable %s at %L may not have the "
15381 "INTENT(OUT) attribute",
15382 sym
->name
, &sym
->declared_at
);
15385 if (sym
->attr
.dimension
&& sym
->as
->type
== AS_EXPLICIT
)
15387 gfc_error ("Assumed-type variable %s at %L shall not be an "
15388 "explicit-shape array", sym
->name
, &sym
->declared_at
);
15393 /* If the symbol is marked as bind(c), that it is declared at module level
15394 scope and verify its type and kind. Do not do the latter for symbols
15395 that are implicitly typed because that is handled in
15396 gfc_set_default_type. Handle dummy arguments and procedure definitions
15397 separately. Also, anything that is use associated is not handled here
15398 but instead is handled in the module it is declared in. Finally, derived
15399 type definitions are allowed to be BIND(C) since that only implies that
15400 they're interoperable, and they are checked fully for interoperability
15401 when a variable is declared of that type. */
15402 if (sym
->attr
.is_bind_c
&& sym
->attr
.use_assoc
== 0
15403 && sym
->attr
.dummy
== 0 && sym
->attr
.flavor
!= FL_PROCEDURE
15404 && sym
->attr
.flavor
!= FL_DERIVED
)
15408 /* First, make sure the variable is declared at the
15409 module-level scope (J3/04-007, Section 15.3). */
15410 if (sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
&&
15411 sym
->attr
.in_common
== 0)
15413 gfc_error ("Variable %qs at %L cannot be BIND(C) because it "
15414 "is neither a COMMON block nor declared at the "
15415 "module level scope", sym
->name
, &(sym
->declared_at
));
15418 else if (sym
->ts
.type
== BT_CHARACTER
15419 && (sym
->ts
.u
.cl
== NULL
|| sym
->ts
.u
.cl
->length
== NULL
15420 || !gfc_is_constant_expr (sym
->ts
.u
.cl
->length
)
15421 || mpz_cmp_si (sym
->ts
.u
.cl
->length
->value
.integer
, 1) != 0))
15423 gfc_error ("BIND(C) Variable %qs at %L must have length one",
15424 sym
->name
, &sym
->declared_at
);
15427 else if (sym
->common_head
!= NULL
&& sym
->attr
.implicit_type
== 0)
15429 t
= verify_com_block_vars_c_interop (sym
->common_head
);
15431 else if (sym
->attr
.implicit_type
== 0)
15433 /* If type() declaration, we need to verify that the components
15434 of the given type are all C interoperable, etc. */
15435 if (sym
->ts
.type
== BT_DERIVED
&&
15436 sym
->ts
.u
.derived
->attr
.is_c_interop
!= 1)
15438 /* Make sure the user marked the derived type as BIND(C). If
15439 not, call the verify routine. This could print an error
15440 for the derived type more than once if multiple variables
15441 of that type are declared. */
15442 if (sym
->ts
.u
.derived
->attr
.is_bind_c
!= 1)
15443 verify_bind_c_derived_type (sym
->ts
.u
.derived
);
15447 /* Verify the variable itself as C interoperable if it
15448 is BIND(C). It is not possible for this to succeed if
15449 the verify_bind_c_derived_type failed, so don't have to handle
15450 any error returned by verify_bind_c_derived_type. */
15451 t
= verify_bind_c_sym (sym
, &(sym
->ts
), sym
->attr
.in_common
,
15452 sym
->common_block
);
15457 /* clear the is_bind_c flag to prevent reporting errors more than
15458 once if something failed. */
15459 sym
->attr
.is_bind_c
= 0;
15464 /* If a derived type symbol has reached this point, without its
15465 type being declared, we have an error. Notice that most
15466 conditions that produce undefined derived types have already
15467 been dealt with. However, the likes of:
15468 implicit type(t) (t) ..... call foo (t) will get us here if
15469 the type is not declared in the scope of the implicit
15470 statement. Change the type to BT_UNKNOWN, both because it is so
15471 and to prevent an ICE. */
15472 if (sym
->ts
.type
== BT_DERIVED
&& !sym
->attr
.is_iso_c
15473 && sym
->ts
.u
.derived
->components
== NULL
15474 && !sym
->ts
.u
.derived
->attr
.zero_comp
)
15476 gfc_error ("The derived type %qs at %L is of type %qs, "
15477 "which has not been defined", sym
->name
,
15478 &sym
->declared_at
, sym
->ts
.u
.derived
->name
);
15479 sym
->ts
.type
= BT_UNKNOWN
;
15483 /* Make sure that the derived type has been resolved and that the
15484 derived type is visible in the symbol's namespace, if it is a
15485 module function and is not PRIVATE. */
15486 if (sym
->ts
.type
== BT_DERIVED
15487 && sym
->ts
.u
.derived
->attr
.use_assoc
15488 && sym
->ns
->proc_name
15489 && sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
15490 && !resolve_fl_derived (sym
->ts
.u
.derived
))
15493 /* Unless the derived-type declaration is use associated, Fortran 95
15494 does not allow public entries of private derived types.
15495 See 4.4.1 (F95) and 4.5.1.1 (F2003); and related interpretation
15496 161 in 95-006r3. */
15497 if (sym
->ts
.type
== BT_DERIVED
15498 && sym
->ns
->proc_name
&& sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
15499 && !sym
->ts
.u
.derived
->attr
.use_assoc
15500 && gfc_check_symbol_access (sym
)
15501 && !gfc_check_symbol_access (sym
->ts
.u
.derived
)
15502 && !gfc_notify_std (GFC_STD_F2003
, "PUBLIC %s %qs at %L of PRIVATE "
15503 "derived type %qs",
15504 (sym
->attr
.flavor
== FL_PARAMETER
)
15505 ? "parameter" : "variable",
15506 sym
->name
, &sym
->declared_at
,
15507 sym
->ts
.u
.derived
->name
))
15510 /* F2008, C1302. */
15511 if (sym
->ts
.type
== BT_DERIVED
15512 && ((sym
->ts
.u
.derived
->from_intmod
== INTMOD_ISO_FORTRAN_ENV
15513 && sym
->ts
.u
.derived
->intmod_sym_id
== ISOFORTRAN_LOCK_TYPE
)
15514 || sym
->ts
.u
.derived
->attr
.lock_comp
)
15515 && !sym
->attr
.codimension
&& !sym
->ts
.u
.derived
->attr
.coarray_comp
)
15517 gfc_error ("Variable %s at %L of type LOCK_TYPE or with subcomponent of "
15518 "type LOCK_TYPE must be a coarray", sym
->name
,
15519 &sym
->declared_at
);
15523 /* TS18508, C702/C703. */
15524 if (sym
->ts
.type
== BT_DERIVED
15525 && ((sym
->ts
.u
.derived
->from_intmod
== INTMOD_ISO_FORTRAN_ENV
15526 && sym
->ts
.u
.derived
->intmod_sym_id
== ISOFORTRAN_EVENT_TYPE
)
15527 || sym
->ts
.u
.derived
->attr
.event_comp
)
15528 && !sym
->attr
.codimension
&& !sym
->ts
.u
.derived
->attr
.coarray_comp
)
15530 gfc_error ("Variable %s at %L of type EVENT_TYPE or with subcomponent of "
15531 "type EVENT_TYPE must be a coarray", sym
->name
,
15532 &sym
->declared_at
);
15536 /* An assumed-size array with INTENT(OUT) shall not be of a type for which
15537 default initialization is defined (5.1.2.4.4). */
15538 if (sym
->ts
.type
== BT_DERIVED
15540 && sym
->attr
.intent
== INTENT_OUT
15542 && sym
->as
->type
== AS_ASSUMED_SIZE
)
15544 for (c
= sym
->ts
.u
.derived
->components
; c
; c
= c
->next
)
15546 if (c
->initializer
)
15548 gfc_error ("The INTENT(OUT) dummy argument %qs at %L is "
15549 "ASSUMED SIZE and so cannot have a default initializer",
15550 sym
->name
, &sym
->declared_at
);
15557 if (sym
->ts
.type
== BT_DERIVED
&& sym
->attr
.dummy
15558 && sym
->attr
.intent
== INTENT_OUT
&& sym
->attr
.lock_comp
)
15560 gfc_error ("Dummy argument %qs at %L of LOCK_TYPE shall not be "
15561 "INTENT(OUT)", sym
->name
, &sym
->declared_at
);
15566 if (sym
->ts
.type
== BT_DERIVED
&& sym
->attr
.dummy
15567 && sym
->attr
.intent
== INTENT_OUT
&& sym
->attr
.event_comp
)
15569 gfc_error ("Dummy argument %qs at %L of EVENT_TYPE shall not be "
15570 "INTENT(OUT)", sym
->name
, &sym
->declared_at
);
15575 if ((((sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
->attr
.coarray_comp
)
15576 || (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
15577 && CLASS_DATA (sym
)->attr
.coarray_comp
))
15578 || class_attr
.codimension
)
15579 && (sym
->attr
.result
|| sym
->result
== sym
))
15581 gfc_error ("Function result %qs at %L shall not be a coarray or have "
15582 "a coarray component", sym
->name
, &sym
->declared_at
);
15587 if (sym
->attr
.codimension
&& sym
->ts
.type
== BT_DERIVED
15588 && sym
->ts
.u
.derived
->ts
.is_iso_c
)
15590 gfc_error ("Variable %qs at %L of TYPE(C_PTR) or TYPE(C_FUNPTR) "
15591 "shall not be a coarray", sym
->name
, &sym
->declared_at
);
15596 if (((sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
->attr
.coarray_comp
)
15597 || (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
15598 && CLASS_DATA (sym
)->attr
.coarray_comp
))
15599 && (class_attr
.codimension
|| class_attr
.pointer
|| class_attr
.dimension
15600 || class_attr
.allocatable
))
15602 gfc_error ("Variable %qs at %L with coarray component shall be a "
15603 "nonpointer, nonallocatable scalar, which is not a coarray",
15604 sym
->name
, &sym
->declared_at
);
15608 /* F2008, C526. The function-result case was handled above. */
15609 if (class_attr
.codimension
15610 && !(class_attr
.allocatable
|| sym
->attr
.dummy
|| sym
->attr
.save
15611 || sym
->attr
.select_type_temporary
15612 || sym
->attr
.associate_var
15613 || (sym
->ns
->save_all
&& !sym
->attr
.automatic
)
15614 || sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
15615 || sym
->ns
->proc_name
->attr
.is_main_program
15616 || sym
->attr
.function
|| sym
->attr
.result
|| sym
->attr
.use_assoc
))
15618 gfc_error ("Variable %qs at %L is a coarray and is not ALLOCATABLE, SAVE "
15619 "nor a dummy argument", sym
->name
, &sym
->declared_at
);
15623 else if (class_attr
.codimension
&& !sym
->attr
.select_type_temporary
15624 && !class_attr
.allocatable
&& as
&& as
->cotype
== AS_DEFERRED
)
15626 gfc_error ("Coarray variable %qs at %L shall not have codimensions with "
15627 "deferred shape", sym
->name
, &sym
->declared_at
);
15630 else if (class_attr
.codimension
&& class_attr
.allocatable
&& as
15631 && (as
->cotype
!= AS_DEFERRED
|| as
->type
!= AS_DEFERRED
))
15633 gfc_error ("Allocatable coarray variable %qs at %L must have "
15634 "deferred shape", sym
->name
, &sym
->declared_at
);
15639 if ((((sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
->attr
.coarray_comp
)
15640 || (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
15641 && CLASS_DATA (sym
)->attr
.coarray_comp
))
15642 || (class_attr
.codimension
&& class_attr
.allocatable
))
15643 && sym
->attr
.dummy
&& sym
->attr
.intent
== INTENT_OUT
)
15645 gfc_error ("Variable %qs at %L is INTENT(OUT) and can thus not be an "
15646 "allocatable coarray or have coarray components",
15647 sym
->name
, &sym
->declared_at
);
15651 if (class_attr
.codimension
&& sym
->attr
.dummy
15652 && sym
->ns
->proc_name
&& sym
->ns
->proc_name
->attr
.is_bind_c
)
15654 gfc_error ("Coarray dummy variable %qs at %L not allowed in BIND(C) "
15655 "procedure %qs", sym
->name
, &sym
->declared_at
,
15656 sym
->ns
->proc_name
->name
);
15660 if (sym
->ts
.type
== BT_LOGICAL
15661 && ((sym
->attr
.function
&& sym
->attr
.is_bind_c
&& sym
->result
== sym
)
15662 || ((sym
->attr
.dummy
|| sym
->attr
.result
) && sym
->ns
->proc_name
15663 && sym
->ns
->proc_name
->attr
.is_bind_c
)))
15666 for (i
= 0; gfc_logical_kinds
[i
].kind
; i
++)
15667 if (gfc_logical_kinds
[i
].kind
== sym
->ts
.kind
)
15669 if (!gfc_logical_kinds
[i
].c_bool
&& sym
->attr
.dummy
15670 && !gfc_notify_std (GFC_STD_GNU
, "LOGICAL dummy argument %qs at "
15671 "%L with non-C_Bool kind in BIND(C) procedure "
15672 "%qs", sym
->name
, &sym
->declared_at
,
15673 sym
->ns
->proc_name
->name
))
15675 else if (!gfc_logical_kinds
[i
].c_bool
15676 && !gfc_notify_std (GFC_STD_GNU
, "LOGICAL result variable "
15677 "%qs at %L with non-C_Bool kind in "
15678 "BIND(C) procedure %qs", sym
->name
,
15680 sym
->attr
.function
? sym
->name
15681 : sym
->ns
->proc_name
->name
))
15685 switch (sym
->attr
.flavor
)
15688 if (!resolve_fl_variable (sym
, mp_flag
))
15693 if (sym
->formal
&& !sym
->formal_ns
)
15695 /* Check that none of the arguments are a namelist. */
15696 gfc_formal_arglist
*formal
= sym
->formal
;
15698 for (; formal
; formal
= formal
->next
)
15699 if (formal
->sym
&& formal
->sym
->attr
.flavor
== FL_NAMELIST
)
15701 gfc_error ("Namelist %qs cannot be an argument to "
15702 "subroutine or function at %L",
15703 formal
->sym
->name
, &sym
->declared_at
);
15708 if (!resolve_fl_procedure (sym
, mp_flag
))
15713 if (!resolve_fl_namelist (sym
))
15718 if (!resolve_fl_parameter (sym
))
15726 /* Resolve array specifier. Check as well some constraints
15727 on COMMON blocks. */
15729 check_constant
= sym
->attr
.in_common
&& !sym
->attr
.pointer
;
15731 /* Set the formal_arg_flag so that check_conflict will not throw
15732 an error for host associated variables in the specification
15733 expression for an array_valued function. */
15734 if ((sym
->attr
.function
|| sym
->attr
.result
) && sym
->as
)
15735 formal_arg_flag
= true;
15737 saved_specification_expr
= specification_expr
;
15738 specification_expr
= true;
15739 gfc_resolve_array_spec (sym
->as
, check_constant
);
15740 specification_expr
= saved_specification_expr
;
15742 formal_arg_flag
= false;
15744 /* Resolve formal namespaces. */
15745 if (sym
->formal_ns
&& sym
->formal_ns
!= gfc_current_ns
15746 && !sym
->attr
.contained
&& !sym
->attr
.intrinsic
)
15747 gfc_resolve (sym
->formal_ns
);
15749 /* Make sure the formal namespace is present. */
15750 if (sym
->formal
&& !sym
->formal_ns
)
15752 gfc_formal_arglist
*formal
= sym
->formal
;
15753 while (formal
&& !formal
->sym
)
15754 formal
= formal
->next
;
15758 sym
->formal_ns
= formal
->sym
->ns
;
15759 if (sym
->ns
!= formal
->sym
->ns
)
15760 sym
->formal_ns
->refs
++;
15764 /* Check threadprivate restrictions. */
15765 if (sym
->attr
.threadprivate
&& !sym
->attr
.save
15766 && !(sym
->ns
->save_all
&& !sym
->attr
.automatic
)
15767 && (!sym
->attr
.in_common
15768 && sym
->module
== NULL
15769 && (sym
->ns
->proc_name
== NULL
15770 || sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
)))
15771 gfc_error ("Threadprivate at %L isn't SAVEd", &sym
->declared_at
);
15773 /* Check omp declare target restrictions. */
15774 if (sym
->attr
.omp_declare_target
15775 && sym
->attr
.flavor
== FL_VARIABLE
15777 && !(sym
->ns
->save_all
&& !sym
->attr
.automatic
)
15778 && (!sym
->attr
.in_common
15779 && sym
->module
== NULL
15780 && (sym
->ns
->proc_name
== NULL
15781 || sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
)))
15782 gfc_error ("!$OMP DECLARE TARGET variable %qs at %L isn't SAVEd",
15783 sym
->name
, &sym
->declared_at
);
15785 /* If we have come this far we can apply default-initializers, as
15786 described in 14.7.5, to those variables that have not already
15787 been assigned one. */
15788 if (sym
->ts
.type
== BT_DERIVED
15790 && !sym
->attr
.allocatable
15791 && !sym
->attr
.alloc_comp
)
15793 symbol_attribute
*a
= &sym
->attr
;
15795 if ((!a
->save
&& !a
->dummy
&& !a
->pointer
15796 && !a
->in_common
&& !a
->use_assoc
15798 && !((a
->function
|| a
->result
)
15800 || sym
->ts
.u
.derived
->attr
.alloc_comp
15801 || sym
->ts
.u
.derived
->attr
.pointer_comp
))
15802 && !(a
->function
&& sym
!= sym
->result
))
15803 || (a
->dummy
&& a
->intent
== INTENT_OUT
&& !a
->pointer
))
15804 apply_default_init (sym
);
15805 else if (a
->function
&& sym
->result
&& a
->access
!= ACCESS_PRIVATE
15806 && (sym
->ts
.u
.derived
->attr
.alloc_comp
15807 || sym
->ts
.u
.derived
->attr
.pointer_comp
))
15808 /* Mark the result symbol to be referenced, when it has allocatable
15810 sym
->result
->attr
.referenced
= 1;
15813 if (sym
->ts
.type
== BT_CLASS
&& sym
->ns
== gfc_current_ns
15814 && sym
->attr
.dummy
&& sym
->attr
.intent
== INTENT_OUT
15815 && !CLASS_DATA (sym
)->attr
.class_pointer
15816 && !CLASS_DATA (sym
)->attr
.allocatable
)
15817 apply_default_init (sym
);
15819 /* If this symbol has a type-spec, check it. */
15820 if (sym
->attr
.flavor
== FL_VARIABLE
|| sym
->attr
.flavor
== FL_PARAMETER
15821 || (sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.function
))
15822 if (!resolve_typespec_used (&sym
->ts
, &sym
->declared_at
, sym
->name
))
15825 if (sym
->param_list
)
15830 /************* Resolve DATA statements *************/
15834 gfc_data_value
*vnode
;
15840 /* Advance the values structure to point to the next value in the data list. */
15843 next_data_value (void)
15845 while (mpz_cmp_ui (values
.left
, 0) == 0)
15848 if (values
.vnode
->next
== NULL
)
15851 values
.vnode
= values
.vnode
->next
;
15852 mpz_set (values
.left
, values
.vnode
->repeat
);
15860 check_data_variable (gfc_data_variable
*var
, locus
*where
)
15866 ar_type mark
= AR_UNKNOWN
;
15868 mpz_t section_index
[GFC_MAX_DIMENSIONS
];
15874 if (!gfc_resolve_expr (var
->expr
))
15878 mpz_init_set_si (offset
, 0);
15881 if (e
->expr_type
== EXPR_FUNCTION
&& e
->value
.function
.isym
15882 && e
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
)
15883 e
= e
->value
.function
.actual
->expr
;
15885 if (e
->expr_type
!= EXPR_VARIABLE
)
15887 gfc_error ("Expecting definable entity near %L", where
);
15891 sym
= e
->symtree
->n
.sym
;
15893 if (sym
->ns
->is_block_data
&& !sym
->attr
.in_common
)
15895 gfc_error ("BLOCK DATA element %qs at %L must be in COMMON",
15896 sym
->name
, &sym
->declared_at
);
15900 if (e
->ref
== NULL
&& sym
->as
)
15902 gfc_error ("DATA array %qs at %L must be specified in a previous"
15903 " declaration", sym
->name
, where
);
15907 if (gfc_is_coindexed (e
))
15909 gfc_error ("DATA element %qs at %L cannot have a coindex", sym
->name
,
15914 has_pointer
= sym
->attr
.pointer
;
15916 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
15918 if (ref
->type
== REF_COMPONENT
&& ref
->u
.c
.component
->attr
.pointer
)
15923 if (ref
->type
== REF_ARRAY
&& ref
->u
.ar
.type
!= AR_FULL
)
15925 gfc_error ("DATA element %qs at %L is a pointer and so must "
15926 "be a full array", sym
->name
, where
);
15930 if (values
.vnode
->expr
->expr_type
== EXPR_CONSTANT
)
15932 gfc_error ("DATA object near %L has the pointer attribute "
15933 "and the corresponding DATA value is not a valid "
15934 "initial-data-target", where
);
15940 if (e
->rank
== 0 || has_pointer
)
15942 mpz_init_set_ui (size
, 1);
15949 /* Find the array section reference. */
15950 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
15952 if (ref
->type
!= REF_ARRAY
)
15954 if (ref
->u
.ar
.type
== AR_ELEMENT
)
15960 /* Set marks according to the reference pattern. */
15961 switch (ref
->u
.ar
.type
)
15969 /* Get the start position of array section. */
15970 gfc_get_section_index (ar
, section_index
, &offset
);
15975 gcc_unreachable ();
15978 if (!gfc_array_size (e
, &size
))
15980 gfc_error ("Nonconstant array section at %L in DATA statement",
15982 mpz_clear (offset
);
15989 while (mpz_cmp_ui (size
, 0) > 0)
15991 if (!next_data_value ())
15993 gfc_error ("DATA statement at %L has more variables than values",
15999 t
= gfc_check_assign (var
->expr
, values
.vnode
->expr
, 0);
16003 /* If we have more than one element left in the repeat count,
16004 and we have more than one element left in the target variable,
16005 then create a range assignment. */
16006 /* FIXME: Only done for full arrays for now, since array sections
16008 if (mark
== AR_FULL
&& ref
&& ref
->next
== NULL
16009 && mpz_cmp_ui (values
.left
, 1) > 0 && mpz_cmp_ui (size
, 1) > 0)
16013 if (mpz_cmp (size
, values
.left
) >= 0)
16015 mpz_init_set (range
, values
.left
);
16016 mpz_sub (size
, size
, values
.left
);
16017 mpz_set_ui (values
.left
, 0);
16021 mpz_init_set (range
, size
);
16022 mpz_sub (values
.left
, values
.left
, size
);
16023 mpz_set_ui (size
, 0);
16026 t
= gfc_assign_data_value (var
->expr
, values
.vnode
->expr
,
16029 mpz_add (offset
, offset
, range
);
16036 /* Assign initial value to symbol. */
16039 mpz_sub_ui (values
.left
, values
.left
, 1);
16040 mpz_sub_ui (size
, size
, 1);
16042 t
= gfc_assign_data_value (var
->expr
, values
.vnode
->expr
,
16047 if (mark
== AR_FULL
)
16048 mpz_add_ui (offset
, offset
, 1);
16050 /* Modify the array section indexes and recalculate the offset
16051 for next element. */
16052 else if (mark
== AR_SECTION
)
16053 gfc_advance_section (section_index
, ar
, &offset
);
16057 if (mark
== AR_SECTION
)
16059 for (i
= 0; i
< ar
->dimen
; i
++)
16060 mpz_clear (section_index
[i
]);
16064 mpz_clear (offset
);
16070 static bool traverse_data_var (gfc_data_variable
*, locus
*);
16072 /* Iterate over a list of elements in a DATA statement. */
16075 traverse_data_list (gfc_data_variable
*var
, locus
*where
)
16078 iterator_stack frame
;
16079 gfc_expr
*e
, *start
, *end
, *step
;
16080 bool retval
= true;
16082 mpz_init (frame
.value
);
16085 start
= gfc_copy_expr (var
->iter
.start
);
16086 end
= gfc_copy_expr (var
->iter
.end
);
16087 step
= gfc_copy_expr (var
->iter
.step
);
16089 if (!gfc_simplify_expr (start
, 1)
16090 || start
->expr_type
!= EXPR_CONSTANT
)
16092 gfc_error ("start of implied-do loop at %L could not be "
16093 "simplified to a constant value", &start
->where
);
16097 if (!gfc_simplify_expr (end
, 1)
16098 || end
->expr_type
!= EXPR_CONSTANT
)
16100 gfc_error ("end of implied-do loop at %L could not be "
16101 "simplified to a constant value", &start
->where
);
16105 if (!gfc_simplify_expr (step
, 1)
16106 || step
->expr_type
!= EXPR_CONSTANT
)
16108 gfc_error ("step of implied-do loop at %L could not be "
16109 "simplified to a constant value", &start
->where
);
16114 mpz_set (trip
, end
->value
.integer
);
16115 mpz_sub (trip
, trip
, start
->value
.integer
);
16116 mpz_add (trip
, trip
, step
->value
.integer
);
16118 mpz_div (trip
, trip
, step
->value
.integer
);
16120 mpz_set (frame
.value
, start
->value
.integer
);
16122 frame
.prev
= iter_stack
;
16123 frame
.variable
= var
->iter
.var
->symtree
;
16124 iter_stack
= &frame
;
16126 while (mpz_cmp_ui (trip
, 0) > 0)
16128 if (!traverse_data_var (var
->list
, where
))
16134 e
= gfc_copy_expr (var
->expr
);
16135 if (!gfc_simplify_expr (e
, 1))
16142 mpz_add (frame
.value
, frame
.value
, step
->value
.integer
);
16144 mpz_sub_ui (trip
, trip
, 1);
16148 mpz_clear (frame
.value
);
16151 gfc_free_expr (start
);
16152 gfc_free_expr (end
);
16153 gfc_free_expr (step
);
16155 iter_stack
= frame
.prev
;
16160 /* Type resolve variables in the variable list of a DATA statement. */
16163 traverse_data_var (gfc_data_variable
*var
, locus
*where
)
16167 for (; var
; var
= var
->next
)
16169 if (var
->expr
== NULL
)
16170 t
= traverse_data_list (var
, where
);
16172 t
= check_data_variable (var
, where
);
16182 /* Resolve the expressions and iterators associated with a data statement.
16183 This is separate from the assignment checking because data lists should
16184 only be resolved once. */
16187 resolve_data_variables (gfc_data_variable
*d
)
16189 for (; d
; d
= d
->next
)
16191 if (d
->list
== NULL
)
16193 if (!gfc_resolve_expr (d
->expr
))
16198 if (!gfc_resolve_iterator (&d
->iter
, false, true))
16201 if (!resolve_data_variables (d
->list
))
16210 /* Resolve a single DATA statement. We implement this by storing a pointer to
16211 the value list into static variables, and then recursively traversing the
16212 variables list, expanding iterators and such. */
16215 resolve_data (gfc_data
*d
)
16218 if (!resolve_data_variables (d
->var
))
16221 values
.vnode
= d
->value
;
16222 if (d
->value
== NULL
)
16223 mpz_set_ui (values
.left
, 0);
16225 mpz_set (values
.left
, d
->value
->repeat
);
16227 if (!traverse_data_var (d
->var
, &d
->where
))
16230 /* At this point, we better not have any values left. */
16232 if (next_data_value ())
16233 gfc_error ("DATA statement at %L has more values than variables",
16238 /* 12.6 Constraint: In a pure subprogram any variable which is in common or
16239 accessed by host or use association, is a dummy argument to a pure function,
16240 is a dummy argument with INTENT (IN) to a pure subroutine, or an object that
16241 is storage associated with any such variable, shall not be used in the
16242 following contexts: (clients of this function). */
16244 /* Determines if a variable is not 'pure', i.e., not assignable within a pure
16245 procedure. Returns zero if assignment is OK, nonzero if there is a
16248 gfc_impure_variable (gfc_symbol
*sym
)
16253 if (sym
->attr
.use_assoc
|| sym
->attr
.in_common
)
16256 /* Check if the symbol's ns is inside the pure procedure. */
16257 for (ns
= gfc_current_ns
; ns
; ns
= ns
->parent
)
16261 if (ns
->proc_name
->attr
.flavor
== FL_PROCEDURE
&& !sym
->attr
.function
)
16265 proc
= sym
->ns
->proc_name
;
16266 if (sym
->attr
.dummy
16267 && ((proc
->attr
.subroutine
&& sym
->attr
.intent
== INTENT_IN
)
16268 || proc
->attr
.function
))
16271 /* TODO: Sort out what can be storage associated, if anything, and include
16272 it here. In principle equivalences should be scanned but it does not
16273 seem to be possible to storage associate an impure variable this way. */
16278 /* Test whether a symbol is pure or not. For a NULL pointer, checks if the
16279 current namespace is inside a pure procedure. */
16282 gfc_pure (gfc_symbol
*sym
)
16284 symbol_attribute attr
;
16289 /* Check if the current namespace or one of its parents
16290 belongs to a pure procedure. */
16291 for (ns
= gfc_current_ns
; ns
; ns
= ns
->parent
)
16293 sym
= ns
->proc_name
;
16297 if (attr
.flavor
== FL_PROCEDURE
&& attr
.pure
)
16305 return attr
.flavor
== FL_PROCEDURE
&& attr
.pure
;
16309 /* Test whether a symbol is implicitly pure or not. For a NULL pointer,
16310 checks if the current namespace is implicitly pure. Note that this
16311 function returns false for a PURE procedure. */
16314 gfc_implicit_pure (gfc_symbol
*sym
)
16320 /* Check if the current procedure is implicit_pure. Walk up
16321 the procedure list until we find a procedure. */
16322 for (ns
= gfc_current_ns
; ns
; ns
= ns
->parent
)
16324 sym
= ns
->proc_name
;
16328 if (sym
->attr
.flavor
== FL_PROCEDURE
)
16333 return sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.implicit_pure
16334 && !sym
->attr
.pure
;
16339 gfc_unset_implicit_pure (gfc_symbol
*sym
)
16345 /* Check if the current procedure is implicit_pure. Walk up
16346 the procedure list until we find a procedure. */
16347 for (ns
= gfc_current_ns
; ns
; ns
= ns
->parent
)
16349 sym
= ns
->proc_name
;
16353 if (sym
->attr
.flavor
== FL_PROCEDURE
)
16358 if (sym
->attr
.flavor
== FL_PROCEDURE
)
16359 sym
->attr
.implicit_pure
= 0;
16361 sym
->attr
.pure
= 0;
16365 /* Test whether the current procedure is elemental or not. */
16368 gfc_elemental (gfc_symbol
*sym
)
16370 symbol_attribute attr
;
16373 sym
= gfc_current_ns
->proc_name
;
16378 return attr
.flavor
== FL_PROCEDURE
&& attr
.elemental
;
16382 /* Warn about unused labels. */
16385 warn_unused_fortran_label (gfc_st_label
*label
)
16390 warn_unused_fortran_label (label
->left
);
16392 if (label
->defined
== ST_LABEL_UNKNOWN
)
16395 switch (label
->referenced
)
16397 case ST_LABEL_UNKNOWN
:
16398 gfc_warning (OPT_Wunused_label
, "Label %d at %L defined but not used",
16399 label
->value
, &label
->where
);
16402 case ST_LABEL_BAD_TARGET
:
16403 gfc_warning (OPT_Wunused_label
,
16404 "Label %d at %L defined but cannot be used",
16405 label
->value
, &label
->where
);
16412 warn_unused_fortran_label (label
->right
);
16416 /* Returns the sequence type of a symbol or sequence. */
16419 sequence_type (gfc_typespec ts
)
16428 if (ts
.u
.derived
->components
== NULL
)
16429 return SEQ_NONDEFAULT
;
16431 result
= sequence_type (ts
.u
.derived
->components
->ts
);
16432 for (c
= ts
.u
.derived
->components
->next
; c
; c
= c
->next
)
16433 if (sequence_type (c
->ts
) != result
)
16439 if (ts
.kind
!= gfc_default_character_kind
)
16440 return SEQ_NONDEFAULT
;
16442 return SEQ_CHARACTER
;
16445 if (ts
.kind
!= gfc_default_integer_kind
)
16446 return SEQ_NONDEFAULT
;
16448 return SEQ_NUMERIC
;
16451 if (!(ts
.kind
== gfc_default_real_kind
16452 || ts
.kind
== gfc_default_double_kind
))
16453 return SEQ_NONDEFAULT
;
16455 return SEQ_NUMERIC
;
16458 if (ts
.kind
!= gfc_default_complex_kind
)
16459 return SEQ_NONDEFAULT
;
16461 return SEQ_NUMERIC
;
16464 if (ts
.kind
!= gfc_default_logical_kind
)
16465 return SEQ_NONDEFAULT
;
16467 return SEQ_NUMERIC
;
16470 return SEQ_NONDEFAULT
;
16475 /* Resolve derived type EQUIVALENCE object. */
16478 resolve_equivalence_derived (gfc_symbol
*derived
, gfc_symbol
*sym
, gfc_expr
*e
)
16480 gfc_component
*c
= derived
->components
;
16485 /* Shall not be an object of nonsequence derived type. */
16486 if (!derived
->attr
.sequence
)
16488 gfc_error ("Derived type variable %qs at %L must have SEQUENCE "
16489 "attribute to be an EQUIVALENCE object", sym
->name
,
16494 /* Shall not have allocatable components. */
16495 if (derived
->attr
.alloc_comp
)
16497 gfc_error ("Derived type variable %qs at %L cannot have ALLOCATABLE "
16498 "components to be an EQUIVALENCE object",sym
->name
,
16503 if (sym
->attr
.in_common
&& gfc_has_default_initializer (sym
->ts
.u
.derived
))
16505 gfc_error ("Derived type variable %qs at %L with default "
16506 "initialization cannot be in EQUIVALENCE with a variable "
16507 "in COMMON", sym
->name
, &e
->where
);
16511 for (; c
; c
= c
->next
)
16513 if (gfc_bt_struct (c
->ts
.type
)
16514 && (!resolve_equivalence_derived(c
->ts
.u
.derived
, sym
, e
)))
16517 /* Shall not be an object of sequence derived type containing a pointer
16518 in the structure. */
16519 if (c
->attr
.pointer
)
16521 gfc_error ("Derived type variable %qs at %L with pointer "
16522 "component(s) cannot be an EQUIVALENCE object",
16523 sym
->name
, &e
->where
);
16531 /* Resolve equivalence object.
16532 An EQUIVALENCE object shall not be a dummy argument, a pointer, a target,
16533 an allocatable array, an object of nonsequence derived type, an object of
16534 sequence derived type containing a pointer at any level of component
16535 selection, an automatic object, a function name, an entry name, a result
16536 name, a named constant, a structure component, or a subobject of any of
16537 the preceding objects. A substring shall not have length zero. A
16538 derived type shall not have components with default initialization nor
16539 shall two objects of an equivalence group be initialized.
16540 Either all or none of the objects shall have an protected attribute.
16541 The simple constraints are done in symbol.c(check_conflict) and the rest
16542 are implemented here. */
16545 resolve_equivalence (gfc_equiv
*eq
)
16548 gfc_symbol
*first_sym
;
16551 locus
*last_where
= NULL
;
16552 seq_type eq_type
, last_eq_type
;
16553 gfc_typespec
*last_ts
;
16554 int object
, cnt_protected
;
16557 last_ts
= &eq
->expr
->symtree
->n
.sym
->ts
;
16559 first_sym
= eq
->expr
->symtree
->n
.sym
;
16563 for (object
= 1; eq
; eq
= eq
->eq
, object
++)
16567 e
->ts
= e
->symtree
->n
.sym
->ts
;
16568 /* match_varspec might not know yet if it is seeing
16569 array reference or substring reference, as it doesn't
16571 if (e
->ref
&& e
->ref
->type
== REF_ARRAY
)
16573 gfc_ref
*ref
= e
->ref
;
16574 sym
= e
->symtree
->n
.sym
;
16576 if (sym
->attr
.dimension
)
16578 ref
->u
.ar
.as
= sym
->as
;
16582 /* For substrings, convert REF_ARRAY into REF_SUBSTRING. */
16583 if (e
->ts
.type
== BT_CHARACTER
16585 && ref
->type
== REF_ARRAY
16586 && ref
->u
.ar
.dimen
== 1
16587 && ref
->u
.ar
.dimen_type
[0] == DIMEN_RANGE
16588 && ref
->u
.ar
.stride
[0] == NULL
)
16590 gfc_expr
*start
= ref
->u
.ar
.start
[0];
16591 gfc_expr
*end
= ref
->u
.ar
.end
[0];
16594 /* Optimize away the (:) reference. */
16595 if (start
== NULL
&& end
== NULL
)
16598 e
->ref
= ref
->next
;
16600 e
->ref
->next
= ref
->next
;
16605 ref
->type
= REF_SUBSTRING
;
16607 start
= gfc_get_int_expr (gfc_charlen_int_kind
,
16609 ref
->u
.ss
.start
= start
;
16610 if (end
== NULL
&& e
->ts
.u
.cl
)
16611 end
= gfc_copy_expr (e
->ts
.u
.cl
->length
);
16612 ref
->u
.ss
.end
= end
;
16613 ref
->u
.ss
.length
= e
->ts
.u
.cl
;
16620 /* Any further ref is an error. */
16623 gcc_assert (ref
->type
== REF_ARRAY
);
16624 gfc_error ("Syntax error in EQUIVALENCE statement at %L",
16630 if (!gfc_resolve_expr (e
))
16633 sym
= e
->symtree
->n
.sym
;
16635 if (sym
->attr
.is_protected
)
16637 if (cnt_protected
> 0 && cnt_protected
!= object
)
16639 gfc_error ("Either all or none of the objects in the "
16640 "EQUIVALENCE set at %L shall have the "
16641 "PROTECTED attribute",
16646 /* Shall not equivalence common block variables in a PURE procedure. */
16647 if (sym
->ns
->proc_name
16648 && sym
->ns
->proc_name
->attr
.pure
16649 && sym
->attr
.in_common
)
16651 /* Need to check for symbols that may have entered the pure
16652 procedure via a USE statement. */
16653 bool saw_sym
= false;
16654 if (sym
->ns
->use_stmts
)
16657 for (r
= sym
->ns
->use_stmts
->rename
; r
; r
= r
->next
)
16658 if (strcmp(r
->use_name
, sym
->name
) == 0) saw_sym
= true;
16664 gfc_error ("COMMON block member %qs at %L cannot be an "
16665 "EQUIVALENCE object in the pure procedure %qs",
16666 sym
->name
, &e
->where
, sym
->ns
->proc_name
->name
);
16670 /* Shall not be a named constant. */
16671 if (e
->expr_type
== EXPR_CONSTANT
)
16673 gfc_error ("Named constant %qs at %L cannot be an EQUIVALENCE "
16674 "object", sym
->name
, &e
->where
);
16678 if (e
->ts
.type
== BT_DERIVED
16679 && !resolve_equivalence_derived (e
->ts
.u
.derived
, sym
, e
))
16682 /* Check that the types correspond correctly:
16684 A numeric sequence structure may be equivalenced to another sequence
16685 structure, an object of default integer type, default real type, double
16686 precision real type, default logical type such that components of the
16687 structure ultimately only become associated to objects of the same
16688 kind. A character sequence structure may be equivalenced to an object
16689 of default character kind or another character sequence structure.
16690 Other objects may be equivalenced only to objects of the same type and
16691 kind parameters. */
16693 /* Identical types are unconditionally OK. */
16694 if (object
== 1 || gfc_compare_types (last_ts
, &sym
->ts
))
16695 goto identical_types
;
16697 last_eq_type
= sequence_type (*last_ts
);
16698 eq_type
= sequence_type (sym
->ts
);
16700 /* Since the pair of objects is not of the same type, mixed or
16701 non-default sequences can be rejected. */
16703 msg
= "Sequence %s with mixed components in EQUIVALENCE "
16704 "statement at %L with different type objects";
16706 && last_eq_type
== SEQ_MIXED
16707 && !gfc_notify_std (GFC_STD_GNU
, msg
, first_sym
->name
, last_where
))
16708 || (eq_type
== SEQ_MIXED
16709 && !gfc_notify_std (GFC_STD_GNU
, msg
, sym
->name
, &e
->where
)))
16712 msg
= "Non-default type object or sequence %s in EQUIVALENCE "
16713 "statement at %L with objects of different type";
16715 && last_eq_type
== SEQ_NONDEFAULT
16716 && !gfc_notify_std (GFC_STD_GNU
, msg
, first_sym
->name
, last_where
))
16717 || (eq_type
== SEQ_NONDEFAULT
16718 && !gfc_notify_std (GFC_STD_GNU
, msg
, sym
->name
, &e
->where
)))
16721 msg
="Non-CHARACTER object %qs in default CHARACTER "
16722 "EQUIVALENCE statement at %L";
16723 if (last_eq_type
== SEQ_CHARACTER
16724 && eq_type
!= SEQ_CHARACTER
16725 && !gfc_notify_std (GFC_STD_GNU
, msg
, sym
->name
, &e
->where
))
16728 msg
="Non-NUMERIC object %qs in default NUMERIC "
16729 "EQUIVALENCE statement at %L";
16730 if (last_eq_type
== SEQ_NUMERIC
16731 && eq_type
!= SEQ_NUMERIC
16732 && !gfc_notify_std (GFC_STD_GNU
, msg
, sym
->name
, &e
->where
))
16737 last_where
= &e
->where
;
16742 /* Shall not be an automatic array. */
16743 if (e
->ref
->type
== REF_ARRAY
16744 && !gfc_resolve_array_spec (e
->ref
->u
.ar
.as
, 1))
16746 gfc_error ("Array %qs at %L with non-constant bounds cannot be "
16747 "an EQUIVALENCE object", sym
->name
, &e
->where
);
16754 /* Shall not be a structure component. */
16755 if (r
->type
== REF_COMPONENT
)
16757 gfc_error ("Structure component %qs at %L cannot be an "
16758 "EQUIVALENCE object",
16759 r
->u
.c
.component
->name
, &e
->where
);
16763 /* A substring shall not have length zero. */
16764 if (r
->type
== REF_SUBSTRING
)
16766 if (compare_bound (r
->u
.ss
.start
, r
->u
.ss
.end
) == CMP_GT
)
16768 gfc_error ("Substring at %L has length zero",
16769 &r
->u
.ss
.start
->where
);
16779 /* Function called by resolve_fntype to flag other symbol used in the
16780 length type parameter specification of function resuls. */
16783 flag_fn_result_spec (gfc_expr
*expr
,
16785 int *f ATTRIBUTE_UNUSED
)
16790 if (expr
->expr_type
== EXPR_VARIABLE
)
16792 s
= expr
->symtree
->n
.sym
;
16793 for (ns
= s
->ns
; ns
; ns
= ns
->parent
)
16799 gfc_error ("Self reference in character length expression "
16800 "for %qs at %L", sym
->name
, &expr
->where
);
16804 if (!s
->fn_result_spec
16805 && s
->attr
.flavor
== FL_PARAMETER
)
16807 /* Function contained in a module.... */
16808 if (ns
->proc_name
&& ns
->proc_name
->attr
.flavor
== FL_MODULE
)
16811 s
->fn_result_spec
= 1;
16812 /* Make sure that this symbol is translated as a module
16814 st
= gfc_get_unique_symtree (ns
);
16818 /* ... which is use associated and called. */
16819 else if (s
->attr
.use_assoc
|| s
->attr
.used_in_submodule
16821 /* External function matched with an interface. */
16824 && s
->ns
->proc_name
->attr
.if_source
== IFSRC_DECL
)
16825 || s
->ns
->proc_name
->attr
.if_source
== IFSRC_IFBODY
)
16826 && s
->ns
->proc_name
->attr
.function
))
16827 s
->fn_result_spec
= 1;
16834 /* Resolve function and ENTRY types, issue diagnostics if needed. */
16837 resolve_fntype (gfc_namespace
*ns
)
16839 gfc_entry_list
*el
;
16842 if (ns
->proc_name
== NULL
|| !ns
->proc_name
->attr
.function
)
16845 /* If there are any entries, ns->proc_name is the entry master
16846 synthetic symbol and ns->entries->sym actual FUNCTION symbol. */
16848 sym
= ns
->entries
->sym
;
16850 sym
= ns
->proc_name
;
16851 if (sym
->result
== sym
16852 && sym
->ts
.type
== BT_UNKNOWN
16853 && !gfc_set_default_type (sym
, 0, NULL
)
16854 && !sym
->attr
.untyped
)
16856 gfc_error ("Function %qs at %L has no IMPLICIT type",
16857 sym
->name
, &sym
->declared_at
);
16858 sym
->attr
.untyped
= 1;
16861 if (sym
->ts
.type
== BT_DERIVED
&& !sym
->ts
.u
.derived
->attr
.use_assoc
16862 && !sym
->attr
.contained
16863 && !gfc_check_symbol_access (sym
->ts
.u
.derived
)
16864 && gfc_check_symbol_access (sym
))
16866 gfc_notify_std (GFC_STD_F2003
, "PUBLIC function %qs at "
16867 "%L of PRIVATE type %qs", sym
->name
,
16868 &sym
->declared_at
, sym
->ts
.u
.derived
->name
);
16872 for (el
= ns
->entries
->next
; el
; el
= el
->next
)
16874 if (el
->sym
->result
== el
->sym
16875 && el
->sym
->ts
.type
== BT_UNKNOWN
16876 && !gfc_set_default_type (el
->sym
, 0, NULL
)
16877 && !el
->sym
->attr
.untyped
)
16879 gfc_error ("ENTRY %qs at %L has no IMPLICIT type",
16880 el
->sym
->name
, &el
->sym
->declared_at
);
16881 el
->sym
->attr
.untyped
= 1;
16885 if (sym
->ts
.type
== BT_CHARACTER
)
16886 gfc_traverse_expr (sym
->ts
.u
.cl
->length
, sym
, flag_fn_result_spec
, 0);
16890 /* 12.3.2.1.1 Defined operators. */
16893 check_uop_procedure (gfc_symbol
*sym
, locus where
)
16895 gfc_formal_arglist
*formal
;
16897 if (!sym
->attr
.function
)
16899 gfc_error ("User operator procedure %qs at %L must be a FUNCTION",
16900 sym
->name
, &where
);
16904 if (sym
->ts
.type
== BT_CHARACTER
16905 && !((sym
->ts
.u
.cl
&& sym
->ts
.u
.cl
->length
) || sym
->ts
.deferred
)
16906 && !(sym
->result
&& ((sym
->result
->ts
.u
.cl
16907 && sym
->result
->ts
.u
.cl
->length
) || sym
->result
->ts
.deferred
)))
16909 gfc_error ("User operator procedure %qs at %L cannot be assumed "
16910 "character length", sym
->name
, &where
);
16914 formal
= gfc_sym_get_dummy_args (sym
);
16915 if (!formal
|| !formal
->sym
)
16917 gfc_error ("User operator procedure %qs at %L must have at least "
16918 "one argument", sym
->name
, &where
);
16922 if (formal
->sym
->attr
.intent
!= INTENT_IN
)
16924 gfc_error ("First argument of operator interface at %L must be "
16925 "INTENT(IN)", &where
);
16929 if (formal
->sym
->attr
.optional
)
16931 gfc_error ("First argument of operator interface at %L cannot be "
16932 "optional", &where
);
16936 formal
= formal
->next
;
16937 if (!formal
|| !formal
->sym
)
16940 if (formal
->sym
->attr
.intent
!= INTENT_IN
)
16942 gfc_error ("Second argument of operator interface at %L must be "
16943 "INTENT(IN)", &where
);
16947 if (formal
->sym
->attr
.optional
)
16949 gfc_error ("Second argument of operator interface at %L cannot be "
16950 "optional", &where
);
16956 gfc_error ("Operator interface at %L must have, at most, two "
16957 "arguments", &where
);
16965 gfc_resolve_uops (gfc_symtree
*symtree
)
16967 gfc_interface
*itr
;
16969 if (symtree
== NULL
)
16972 gfc_resolve_uops (symtree
->left
);
16973 gfc_resolve_uops (symtree
->right
);
16975 for (itr
= symtree
->n
.uop
->op
; itr
; itr
= itr
->next
)
16976 check_uop_procedure (itr
->sym
, itr
->sym
->declared_at
);
16980 /* Examine all of the expressions associated with a program unit,
16981 assign types to all intermediate expressions, make sure that all
16982 assignments are to compatible types and figure out which names
16983 refer to which functions or subroutines. It doesn't check code
16984 block, which is handled by gfc_resolve_code. */
16987 resolve_types (gfc_namespace
*ns
)
16993 gfc_namespace
* old_ns
= gfc_current_ns
;
16995 if (ns
->types_resolved
)
16998 /* Check that all IMPLICIT types are ok. */
16999 if (!ns
->seen_implicit_none
)
17002 for (letter
= 0; letter
!= GFC_LETTERS
; ++letter
)
17003 if (ns
->set_flag
[letter
]
17004 && !resolve_typespec_used (&ns
->default_type
[letter
],
17005 &ns
->implicit_loc
[letter
], NULL
))
17009 gfc_current_ns
= ns
;
17011 resolve_entries (ns
);
17013 resolve_common_vars (&ns
->blank_common
, false);
17014 resolve_common_blocks (ns
->common_root
);
17016 resolve_contained_functions (ns
);
17018 if (ns
->proc_name
&& ns
->proc_name
->attr
.flavor
== FL_PROCEDURE
17019 && ns
->proc_name
->attr
.if_source
== IFSRC_IFBODY
)
17020 resolve_formal_arglist (ns
->proc_name
);
17022 gfc_traverse_ns (ns
, resolve_bind_c_derived_types
);
17024 for (cl
= ns
->cl_list
; cl
; cl
= cl
->next
)
17025 resolve_charlen (cl
);
17027 gfc_traverse_ns (ns
, resolve_symbol
);
17029 resolve_fntype (ns
);
17031 for (n
= ns
->contained
; n
; n
= n
->sibling
)
17033 if (gfc_pure (ns
->proc_name
) && !gfc_pure (n
->proc_name
))
17034 gfc_error ("Contained procedure %qs at %L of a PURE procedure must "
17035 "also be PURE", n
->proc_name
->name
,
17036 &n
->proc_name
->declared_at
);
17042 gfc_do_concurrent_flag
= 0;
17043 gfc_check_interfaces (ns
);
17045 gfc_traverse_ns (ns
, resolve_values
);
17047 if (ns
->save_all
|| !flag_automatic
)
17051 for (d
= ns
->data
; d
; d
= d
->next
)
17055 gfc_traverse_ns (ns
, gfc_formalize_init_value
);
17057 gfc_traverse_ns (ns
, gfc_verify_binding_labels
);
17059 for (eq
= ns
->equiv
; eq
; eq
= eq
->next
)
17060 resolve_equivalence (eq
);
17062 /* Warn about unused labels. */
17063 if (warn_unused_label
)
17064 warn_unused_fortran_label (ns
->st_labels
);
17066 gfc_resolve_uops (ns
->uop_root
);
17068 gfc_traverse_ns (ns
, gfc_verify_DTIO_procedures
);
17070 gfc_resolve_omp_declare_simd (ns
);
17072 gfc_resolve_omp_udrs (ns
->omp_udr_root
);
17074 ns
->types_resolved
= 1;
17076 gfc_current_ns
= old_ns
;
17080 /* Call gfc_resolve_code recursively. */
17083 resolve_codes (gfc_namespace
*ns
)
17086 bitmap_obstack old_obstack
;
17088 if (ns
->resolved
== 1)
17091 for (n
= ns
->contained
; n
; n
= n
->sibling
)
17094 gfc_current_ns
= ns
;
17096 /* Don't clear 'cs_base' if this is the namespace of a BLOCK construct. */
17097 if (!(ns
->proc_name
&& ns
->proc_name
->attr
.flavor
== FL_LABEL
))
17100 /* Set to an out of range value. */
17101 current_entry_id
= -1;
17103 old_obstack
= labels_obstack
;
17104 bitmap_obstack_initialize (&labels_obstack
);
17106 gfc_resolve_oacc_declare (ns
);
17107 gfc_resolve_oacc_routines (ns
);
17108 gfc_resolve_omp_local_vars (ns
);
17109 gfc_resolve_code (ns
->code
, ns
);
17111 bitmap_obstack_release (&labels_obstack
);
17112 labels_obstack
= old_obstack
;
17116 /* This function is called after a complete program unit has been compiled.
17117 Its purpose is to examine all of the expressions associated with a program
17118 unit, assign types to all intermediate expressions, make sure that all
17119 assignments are to compatible types and figure out which names refer to
17120 which functions or subroutines. */
17123 gfc_resolve (gfc_namespace
*ns
)
17125 gfc_namespace
*old_ns
;
17126 code_stack
*old_cs_base
;
17127 struct gfc_omp_saved_state old_omp_state
;
17133 old_ns
= gfc_current_ns
;
17134 old_cs_base
= cs_base
;
17136 /* As gfc_resolve can be called during resolution of an OpenMP construct
17137 body, we should clear any state associated to it, so that say NS's
17138 DO loops are not interpreted as OpenMP loops. */
17139 if (!ns
->construct_entities
)
17140 gfc_omp_save_and_clear_state (&old_omp_state
);
17142 resolve_types (ns
);
17143 component_assignment_level
= 0;
17144 resolve_codes (ns
);
17146 gfc_current_ns
= old_ns
;
17147 cs_base
= old_cs_base
;
17150 gfc_run_passes (ns
);
17152 if (!ns
->construct_entities
)
17153 gfc_omp_restore_state (&old_omp_state
);