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 (OPT_Wargument_mismatch
,
1433 "Interface mismatch for procedure-pointer "
1434 "component %qs in structure constructor at %L:"
1435 " %s", comp
->name
, &cons
->expr
->where
, err
);
1440 if (!comp
->attr
.pointer
|| comp
->attr
.proc_pointer
1441 || cons
->expr
->expr_type
== EXPR_NULL
)
1444 a
= gfc_expr_attr (cons
->expr
);
1446 if (!a
.pointer
&& !a
.target
)
1449 gfc_error ("The element in the structure constructor at %L, "
1450 "for pointer component %qs should be a POINTER or "
1451 "a TARGET", &cons
->expr
->where
, comp
->name
);
1456 /* F08:C461. Additional checks for pointer initialization. */
1460 gfc_error ("Pointer initialization target at %L "
1461 "must not be ALLOCATABLE", &cons
->expr
->where
);
1466 gfc_error ("Pointer initialization target at %L "
1467 "must have the SAVE attribute", &cons
->expr
->where
);
1471 /* F2003, C1272 (3). */
1472 bool impure
= cons
->expr
->expr_type
== EXPR_VARIABLE
1473 && (gfc_impure_variable (cons
->expr
->symtree
->n
.sym
)
1474 || gfc_is_coindexed (cons
->expr
));
1475 if (impure
&& gfc_pure (NULL
))
1478 gfc_error ("Invalid expression in the structure constructor for "
1479 "pointer component %qs at %L in PURE procedure",
1480 comp
->name
, &cons
->expr
->where
);
1484 gfc_unset_implicit_pure (NULL
);
1491 /****************** Expression name resolution ******************/
1493 /* Returns 0 if a symbol was not declared with a type or
1494 attribute declaration statement, nonzero otherwise. */
1497 was_declared (gfc_symbol
*sym
)
1503 if (!a
.implicit_type
&& sym
->ts
.type
!= BT_UNKNOWN
)
1506 if (a
.allocatable
|| a
.dimension
|| a
.dummy
|| a
.external
|| a
.intrinsic
1507 || a
.optional
|| a
.pointer
|| a
.save
|| a
.target
|| a
.volatile_
1508 || a
.value
|| a
.access
!= ACCESS_UNKNOWN
|| a
.intent
!= INTENT_UNKNOWN
1509 || a
.asynchronous
|| a
.codimension
)
1516 /* Determine if a symbol is generic or not. */
1519 generic_sym (gfc_symbol
*sym
)
1523 if (sym
->attr
.generic
||
1524 (sym
->attr
.intrinsic
&& gfc_generic_intrinsic (sym
->name
)))
1527 if (was_declared (sym
) || sym
->ns
->parent
== NULL
)
1530 gfc_find_symbol (sym
->name
, sym
->ns
->parent
, 1, &s
);
1537 return generic_sym (s
);
1544 /* Determine if a symbol is specific or not. */
1547 specific_sym (gfc_symbol
*sym
)
1551 if (sym
->attr
.if_source
== IFSRC_IFBODY
1552 || sym
->attr
.proc
== PROC_MODULE
1553 || sym
->attr
.proc
== PROC_INTERNAL
1554 || sym
->attr
.proc
== PROC_ST_FUNCTION
1555 || (sym
->attr
.intrinsic
&& gfc_specific_intrinsic (sym
->name
))
1556 || sym
->attr
.external
)
1559 if (was_declared (sym
) || sym
->ns
->parent
== NULL
)
1562 gfc_find_symbol (sym
->name
, sym
->ns
->parent
, 1, &s
);
1564 return (s
== NULL
) ? 0 : specific_sym (s
);
1568 /* Figure out if the procedure is specific, generic or unknown. */
1571 { PTYPE_GENERIC
= 1, PTYPE_SPECIFIC
, PTYPE_UNKNOWN
};
1574 procedure_kind (gfc_symbol
*sym
)
1576 if (generic_sym (sym
))
1577 return PTYPE_GENERIC
;
1579 if (specific_sym (sym
))
1580 return PTYPE_SPECIFIC
;
1582 return PTYPE_UNKNOWN
;
1585 /* Check references to assumed size arrays. The flag need_full_assumed_size
1586 is nonzero when matching actual arguments. */
1588 static int need_full_assumed_size
= 0;
1591 check_assumed_size_reference (gfc_symbol
*sym
, gfc_expr
*e
)
1593 if (need_full_assumed_size
|| !(sym
->as
&& sym
->as
->type
== AS_ASSUMED_SIZE
))
1596 /* FIXME: The comparison "e->ref->u.ar.type == AR_FULL" is wrong.
1597 What should it be? */
1598 if (e
->ref
&& (e
->ref
->u
.ar
.end
[e
->ref
->u
.ar
.as
->rank
- 1] == NULL
)
1599 && (e
->ref
->u
.ar
.as
->type
== AS_ASSUMED_SIZE
)
1600 && (e
->ref
->u
.ar
.type
== AR_FULL
))
1602 gfc_error ("The upper bound in the last dimension must "
1603 "appear in the reference to the assumed size "
1604 "array %qs at %L", sym
->name
, &e
->where
);
1611 /* Look for bad assumed size array references in argument expressions
1612 of elemental and array valued intrinsic procedures. Since this is
1613 called from procedure resolution functions, it only recurses at
1617 resolve_assumed_size_actual (gfc_expr
*e
)
1622 switch (e
->expr_type
)
1625 if (e
->symtree
&& check_assumed_size_reference (e
->symtree
->n
.sym
, e
))
1630 if (resolve_assumed_size_actual (e
->value
.op
.op1
)
1631 || resolve_assumed_size_actual (e
->value
.op
.op2
))
1642 /* Check a generic procedure, passed as an actual argument, to see if
1643 there is a matching specific name. If none, it is an error, and if
1644 more than one, the reference is ambiguous. */
1646 count_specific_procs (gfc_expr
*e
)
1653 sym
= e
->symtree
->n
.sym
;
1655 for (p
= sym
->generic
; p
; p
= p
->next
)
1656 if (strcmp (sym
->name
, p
->sym
->name
) == 0)
1658 e
->symtree
= gfc_find_symtree (p
->sym
->ns
->sym_root
,
1664 gfc_error ("%qs at %L is ambiguous", e
->symtree
->n
.sym
->name
,
1668 gfc_error ("GENERIC procedure %qs is not allowed as an actual "
1669 "argument at %L", sym
->name
, &e
->where
);
1675 /* See if a call to sym could possibly be a not allowed RECURSION because of
1676 a missing RECURSIVE declaration. This means that either sym is the current
1677 context itself, or sym is the parent of a contained procedure calling its
1678 non-RECURSIVE containing procedure.
1679 This also works if sym is an ENTRY. */
1682 is_illegal_recursion (gfc_symbol
* sym
, gfc_namespace
* context
)
1684 gfc_symbol
* proc_sym
;
1685 gfc_symbol
* context_proc
;
1686 gfc_namespace
* real_context
;
1688 if (sym
->attr
.flavor
== FL_PROGRAM
1689 || gfc_fl_struct (sym
->attr
.flavor
))
1692 /* If we've got an ENTRY, find real procedure. */
1693 if (sym
->attr
.entry
&& sym
->ns
->entries
)
1694 proc_sym
= sym
->ns
->entries
->sym
;
1698 /* If sym is RECURSIVE, all is well of course. */
1699 if (proc_sym
->attr
.recursive
|| flag_recursive
)
1702 /* Find the context procedure's "real" symbol if it has entries.
1703 We look for a procedure symbol, so recurse on the parents if we don't
1704 find one (like in case of a BLOCK construct). */
1705 for (real_context
= context
; ; real_context
= real_context
->parent
)
1707 /* We should find something, eventually! */
1708 gcc_assert (real_context
);
1710 context_proc
= (real_context
->entries
? real_context
->entries
->sym
1711 : real_context
->proc_name
);
1713 /* In some special cases, there may not be a proc_name, like for this
1715 real(bad_kind()) function foo () ...
1716 when checking the call to bad_kind ().
1717 In these cases, we simply return here and assume that the
1722 if (context_proc
->attr
.flavor
!= FL_LABEL
)
1726 /* A call from sym's body to itself is recursion, of course. */
1727 if (context_proc
== proc_sym
)
1730 /* The same is true if context is a contained procedure and sym the
1732 if (context_proc
->attr
.contained
)
1734 gfc_symbol
* parent_proc
;
1736 gcc_assert (context
->parent
);
1737 parent_proc
= (context
->parent
->entries
? context
->parent
->entries
->sym
1738 : context
->parent
->proc_name
);
1740 if (parent_proc
== proc_sym
)
1748 /* Resolve an intrinsic procedure: Set its function/subroutine attribute,
1749 its typespec and formal argument list. */
1752 gfc_resolve_intrinsic (gfc_symbol
*sym
, locus
*loc
)
1754 gfc_intrinsic_sym
* isym
= NULL
;
1760 /* Already resolved. */
1761 if (sym
->from_intmod
&& sym
->ts
.type
!= BT_UNKNOWN
)
1764 /* We already know this one is an intrinsic, so we don't call
1765 gfc_is_intrinsic for full checking but rather use gfc_find_function and
1766 gfc_find_subroutine directly to check whether it is a function or
1769 if (sym
->intmod_sym_id
&& sym
->attr
.subroutine
)
1771 gfc_isym_id id
= gfc_isym_id_by_intmod_sym (sym
);
1772 isym
= gfc_intrinsic_subroutine_by_id (id
);
1774 else if (sym
->intmod_sym_id
)
1776 gfc_isym_id id
= gfc_isym_id_by_intmod_sym (sym
);
1777 isym
= gfc_intrinsic_function_by_id (id
);
1779 else if (!sym
->attr
.subroutine
)
1780 isym
= gfc_find_function (sym
->name
);
1782 if (isym
&& !sym
->attr
.subroutine
)
1784 if (sym
->ts
.type
!= BT_UNKNOWN
&& warn_surprising
1785 && !sym
->attr
.implicit_type
)
1786 gfc_warning (OPT_Wsurprising
,
1787 "Type specified for intrinsic function %qs at %L is"
1788 " ignored", sym
->name
, &sym
->declared_at
);
1790 if (!sym
->attr
.function
&&
1791 !gfc_add_function(&sym
->attr
, sym
->name
, loc
))
1796 else if (isym
|| (isym
= gfc_find_subroutine (sym
->name
)))
1798 if (sym
->ts
.type
!= BT_UNKNOWN
&& !sym
->attr
.implicit_type
)
1800 gfc_error ("Intrinsic subroutine %qs at %L shall not have a type"
1801 " specifier", sym
->name
, &sym
->declared_at
);
1805 if (!sym
->attr
.subroutine
&&
1806 !gfc_add_subroutine(&sym
->attr
, sym
->name
, loc
))
1811 gfc_error ("%qs declared INTRINSIC at %L does not exist", sym
->name
,
1816 gfc_copy_formal_args_intr (sym
, isym
, NULL
);
1818 sym
->attr
.pure
= isym
->pure
;
1819 sym
->attr
.elemental
= isym
->elemental
;
1821 /* Check it is actually available in the standard settings. */
1822 if (!gfc_check_intrinsic_standard (isym
, &symstd
, false, sym
->declared_at
))
1824 gfc_error ("The intrinsic %qs declared INTRINSIC at %L is not "
1825 "available in the current standard settings but %s. Use "
1826 "an appropriate %<-std=*%> option or enable "
1827 "%<-fall-intrinsics%> in order to use it.",
1828 sym
->name
, &sym
->declared_at
, symstd
);
1836 /* Resolve a procedure expression, like passing it to a called procedure or as
1837 RHS for a procedure pointer assignment. */
1840 resolve_procedure_expression (gfc_expr
* expr
)
1844 if (expr
->expr_type
!= EXPR_VARIABLE
)
1846 gcc_assert (expr
->symtree
);
1848 sym
= expr
->symtree
->n
.sym
;
1850 if (sym
->attr
.intrinsic
)
1851 gfc_resolve_intrinsic (sym
, &expr
->where
);
1853 if (sym
->attr
.flavor
!= FL_PROCEDURE
1854 || (sym
->attr
.function
&& sym
->result
== sym
))
1857 /* A non-RECURSIVE procedure that is used as procedure expression within its
1858 own body is in danger of being called recursively. */
1859 if (is_illegal_recursion (sym
, gfc_current_ns
))
1860 gfc_warning (0, "Non-RECURSIVE procedure %qs at %L is possibly calling"
1861 " itself recursively. Declare it RECURSIVE or use"
1862 " %<-frecursive%>", sym
->name
, &expr
->where
);
1868 /* Check that name is not a derived type. */
1871 is_dt_name (const char *name
)
1873 gfc_symbol
*dt_list
, *dt_first
;
1875 dt_list
= dt_first
= gfc_derived_types
;
1876 for (; dt_list
; dt_list
= dt_list
->dt_next
)
1878 if (strcmp(dt_list
->name
, name
) == 0)
1880 if (dt_first
== dt_list
->dt_next
)
1887 /* Resolve an actual argument list. Most of the time, this is just
1888 resolving the expressions in the list.
1889 The exception is that we sometimes have to decide whether arguments
1890 that look like procedure arguments are really simple variable
1894 resolve_actual_arglist (gfc_actual_arglist
*arg
, procedure_type ptype
,
1895 bool no_formal_args
)
1898 gfc_symtree
*parent_st
;
1900 gfc_component
*comp
;
1901 int save_need_full_assumed_size
;
1902 bool return_value
= false;
1903 bool actual_arg_sav
= actual_arg
, first_actual_arg_sav
= first_actual_arg
;
1906 first_actual_arg
= true;
1908 for (; arg
; arg
= arg
->next
)
1913 /* Check the label is a valid branching target. */
1916 if (arg
->label
->defined
== ST_LABEL_UNKNOWN
)
1918 gfc_error ("Label %d referenced at %L is never defined",
1919 arg
->label
->value
, &arg
->label
->where
);
1923 first_actual_arg
= false;
1927 if (e
->expr_type
== EXPR_VARIABLE
1928 && e
->symtree
->n
.sym
->attr
.generic
1930 && count_specific_procs (e
) != 1)
1933 if (e
->ts
.type
!= BT_PROCEDURE
)
1935 save_need_full_assumed_size
= need_full_assumed_size
;
1936 if (e
->expr_type
!= EXPR_VARIABLE
)
1937 need_full_assumed_size
= 0;
1938 if (!gfc_resolve_expr (e
))
1940 need_full_assumed_size
= save_need_full_assumed_size
;
1944 /* See if the expression node should really be a variable reference. */
1946 sym
= e
->symtree
->n
.sym
;
1948 if (sym
->attr
.flavor
== FL_PROCEDURE
&& is_dt_name (sym
->name
))
1950 gfc_error ("Derived type %qs is used as an actual "
1951 "argument at %L", sym
->name
, &e
->where
);
1955 if (sym
->attr
.flavor
== FL_PROCEDURE
1956 || sym
->attr
.intrinsic
1957 || sym
->attr
.external
)
1961 /* If a procedure is not already determined to be something else
1962 check if it is intrinsic. */
1963 if (gfc_is_intrinsic (sym
, sym
->attr
.subroutine
, e
->where
))
1964 sym
->attr
.intrinsic
= 1;
1966 if (sym
->attr
.proc
== PROC_ST_FUNCTION
)
1968 gfc_error ("Statement function %qs at %L is not allowed as an "
1969 "actual argument", sym
->name
, &e
->where
);
1972 actual_ok
= gfc_intrinsic_actual_ok (sym
->name
,
1973 sym
->attr
.subroutine
);
1974 if (sym
->attr
.intrinsic
&& actual_ok
== 0)
1976 gfc_error ("Intrinsic %qs at %L is not allowed as an "
1977 "actual argument", sym
->name
, &e
->where
);
1980 if (sym
->attr
.contained
&& !sym
->attr
.use_assoc
1981 && sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
)
1983 if (!gfc_notify_std (GFC_STD_F2008
, "Internal procedure %qs is"
1984 " used as actual argument at %L",
1985 sym
->name
, &e
->where
))
1989 if (sym
->attr
.elemental
&& !sym
->attr
.intrinsic
)
1991 gfc_error ("ELEMENTAL non-INTRINSIC procedure %qs is not "
1992 "allowed as an actual argument at %L", sym
->name
,
1996 /* Check if a generic interface has a specific procedure
1997 with the same name before emitting an error. */
1998 if (sym
->attr
.generic
&& count_specific_procs (e
) != 1)
2001 /* Just in case a specific was found for the expression. */
2002 sym
= e
->symtree
->n
.sym
;
2004 /* If the symbol is the function that names the current (or
2005 parent) scope, then we really have a variable reference. */
2007 if (gfc_is_function_return_value (sym
, sym
->ns
))
2010 /* If all else fails, see if we have a specific intrinsic. */
2011 if (sym
->ts
.type
== BT_UNKNOWN
&& sym
->attr
.intrinsic
)
2013 gfc_intrinsic_sym
*isym
;
2015 isym
= gfc_find_function (sym
->name
);
2016 if (isym
== NULL
|| !isym
->specific
)
2018 gfc_error ("Unable to find a specific INTRINSIC procedure "
2019 "for the reference %qs at %L", sym
->name
,
2024 sym
->attr
.intrinsic
= 1;
2025 sym
->attr
.function
= 1;
2028 if (!gfc_resolve_expr (e
))
2033 /* See if the name is a module procedure in a parent unit. */
2035 if (was_declared (sym
) || sym
->ns
->parent
== NULL
)
2038 if (gfc_find_sym_tree (sym
->name
, sym
->ns
->parent
, 1, &parent_st
))
2040 gfc_error ("Symbol %qs at %L is ambiguous", sym
->name
, &e
->where
);
2044 if (parent_st
== NULL
)
2047 sym
= parent_st
->n
.sym
;
2048 e
->symtree
= parent_st
; /* Point to the right thing. */
2050 if (sym
->attr
.flavor
== FL_PROCEDURE
2051 || sym
->attr
.intrinsic
2052 || sym
->attr
.external
)
2054 if (!gfc_resolve_expr (e
))
2060 e
->expr_type
= EXPR_VARIABLE
;
2062 if ((sym
->as
!= NULL
&& sym
->ts
.type
!= BT_CLASS
)
2063 || (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
2064 && CLASS_DATA (sym
)->as
))
2066 e
->rank
= sym
->ts
.type
== BT_CLASS
2067 ? CLASS_DATA (sym
)->as
->rank
: sym
->as
->rank
;
2068 e
->ref
= gfc_get_ref ();
2069 e
->ref
->type
= REF_ARRAY
;
2070 e
->ref
->u
.ar
.type
= AR_FULL
;
2071 e
->ref
->u
.ar
.as
= sym
->ts
.type
== BT_CLASS
2072 ? CLASS_DATA (sym
)->as
: sym
->as
;
2075 /* Expressions are assigned a default ts.type of BT_PROCEDURE in
2076 primary.c (match_actual_arg). If above code determines that it
2077 is a variable instead, it needs to be resolved as it was not
2078 done at the beginning of this function. */
2079 save_need_full_assumed_size
= need_full_assumed_size
;
2080 if (e
->expr_type
!= EXPR_VARIABLE
)
2081 need_full_assumed_size
= 0;
2082 if (!gfc_resolve_expr (e
))
2084 need_full_assumed_size
= save_need_full_assumed_size
;
2087 /* Check argument list functions %VAL, %LOC and %REF. There is
2088 nothing to do for %REF. */
2089 if (arg
->name
&& arg
->name
[0] == '%')
2091 if (strcmp ("%VAL", arg
->name
) == 0)
2093 if (e
->ts
.type
== BT_CHARACTER
|| e
->ts
.type
== BT_DERIVED
)
2095 gfc_error ("By-value argument at %L is not of numeric "
2102 gfc_error ("By-value argument at %L cannot be an array or "
2103 "an array section", &e
->where
);
2107 /* Intrinsics are still PROC_UNKNOWN here. However,
2108 since same file external procedures are not resolvable
2109 in gfortran, it is a good deal easier to leave them to
2111 if (ptype
!= PROC_UNKNOWN
2112 && ptype
!= PROC_DUMMY
2113 && ptype
!= PROC_EXTERNAL
2114 && ptype
!= PROC_MODULE
)
2116 gfc_error ("By-value argument at %L is not allowed "
2117 "in this context", &e
->where
);
2122 /* Statement functions have already been excluded above. */
2123 else if (strcmp ("%LOC", arg
->name
) == 0
2124 && e
->ts
.type
== BT_PROCEDURE
)
2126 if (e
->symtree
->n
.sym
->attr
.proc
== PROC_INTERNAL
)
2128 gfc_error ("Passing internal procedure at %L by location "
2129 "not allowed", &e
->where
);
2135 comp
= gfc_get_proc_ptr_comp(e
);
2136 if (e
->expr_type
== EXPR_VARIABLE
2137 && comp
&& comp
->attr
.elemental
)
2139 gfc_error ("ELEMENTAL procedure pointer component %qs is not "
2140 "allowed as an actual argument at %L", comp
->name
,
2144 /* Fortran 2008, C1237. */
2145 if (e
->expr_type
== EXPR_VARIABLE
&& gfc_is_coindexed (e
)
2146 && gfc_has_ultimate_pointer (e
))
2148 gfc_error ("Coindexed actual argument at %L with ultimate pointer "
2149 "component", &e
->where
);
2153 first_actual_arg
= false;
2156 return_value
= true;
2159 actual_arg
= actual_arg_sav
;
2160 first_actual_arg
= first_actual_arg_sav
;
2162 return return_value
;
2166 /* Do the checks of the actual argument list that are specific to elemental
2167 procedures. If called with c == NULL, we have a function, otherwise if
2168 expr == NULL, we have a subroutine. */
2171 resolve_elemental_actual (gfc_expr
*expr
, gfc_code
*c
)
2173 gfc_actual_arglist
*arg0
;
2174 gfc_actual_arglist
*arg
;
2175 gfc_symbol
*esym
= NULL
;
2176 gfc_intrinsic_sym
*isym
= NULL
;
2178 gfc_intrinsic_arg
*iformal
= NULL
;
2179 gfc_formal_arglist
*eformal
= NULL
;
2180 bool formal_optional
= false;
2181 bool set_by_optional
= false;
2185 /* Is this an elemental procedure? */
2186 if (expr
&& expr
->value
.function
.actual
!= NULL
)
2188 if (expr
->value
.function
.esym
!= NULL
2189 && expr
->value
.function
.esym
->attr
.elemental
)
2191 arg0
= expr
->value
.function
.actual
;
2192 esym
= expr
->value
.function
.esym
;
2194 else if (expr
->value
.function
.isym
!= NULL
2195 && expr
->value
.function
.isym
->elemental
)
2197 arg0
= expr
->value
.function
.actual
;
2198 isym
= expr
->value
.function
.isym
;
2203 else if (c
&& c
->ext
.actual
!= NULL
)
2205 arg0
= c
->ext
.actual
;
2207 if (c
->resolved_sym
)
2208 esym
= c
->resolved_sym
;
2210 esym
= c
->symtree
->n
.sym
;
2213 if (!esym
->attr
.elemental
)
2219 /* The rank of an elemental is the rank of its array argument(s). */
2220 for (arg
= arg0
; arg
; arg
= arg
->next
)
2222 if (arg
->expr
!= NULL
&& arg
->expr
->rank
!= 0)
2224 rank
= arg
->expr
->rank
;
2225 if (arg
->expr
->expr_type
== EXPR_VARIABLE
2226 && arg
->expr
->symtree
->n
.sym
->attr
.optional
)
2227 set_by_optional
= true;
2229 /* Function specific; set the result rank and shape. */
2233 if (!expr
->shape
&& arg
->expr
->shape
)
2235 expr
->shape
= gfc_get_shape (rank
);
2236 for (i
= 0; i
< rank
; i
++)
2237 mpz_init_set (expr
->shape
[i
], arg
->expr
->shape
[i
]);
2244 /* If it is an array, it shall not be supplied as an actual argument
2245 to an elemental procedure unless an array of the same rank is supplied
2246 as an actual argument corresponding to a nonoptional dummy argument of
2247 that elemental procedure(12.4.1.5). */
2248 formal_optional
= false;
2250 iformal
= isym
->formal
;
2252 eformal
= esym
->formal
;
2254 for (arg
= arg0
; arg
; arg
= arg
->next
)
2258 if (eformal
->sym
&& eformal
->sym
->attr
.optional
)
2259 formal_optional
= true;
2260 eformal
= eformal
->next
;
2262 else if (isym
&& iformal
)
2264 if (iformal
->optional
)
2265 formal_optional
= true;
2266 iformal
= iformal
->next
;
2269 formal_optional
= true;
2271 if (pedantic
&& arg
->expr
!= NULL
2272 && arg
->expr
->expr_type
== EXPR_VARIABLE
2273 && arg
->expr
->symtree
->n
.sym
->attr
.optional
2276 && (set_by_optional
|| arg
->expr
->rank
!= rank
)
2277 && !(isym
&& isym
->id
== GFC_ISYM_CONVERSION
))
2279 gfc_warning (OPT_Wpedantic
,
2280 "%qs at %L is an array and OPTIONAL; IF IT IS "
2281 "MISSING, it cannot be the actual argument of an "
2282 "ELEMENTAL procedure unless there is a non-optional "
2283 "argument with the same rank (12.4.1.5)",
2284 arg
->expr
->symtree
->n
.sym
->name
, &arg
->expr
->where
);
2288 for (arg
= arg0
; arg
; arg
= arg
->next
)
2290 if (arg
->expr
== NULL
|| arg
->expr
->rank
== 0)
2293 /* Being elemental, the last upper bound of an assumed size array
2294 argument must be present. */
2295 if (resolve_assumed_size_actual (arg
->expr
))
2298 /* Elemental procedure's array actual arguments must conform. */
2301 if (!gfc_check_conformance (arg
->expr
, e
, "elemental procedure"))
2308 /* INTENT(OUT) is only allowed for subroutines; if any actual argument
2309 is an array, the intent inout/out variable needs to be also an array. */
2310 if (rank
> 0 && esym
&& expr
== NULL
)
2311 for (eformal
= esym
->formal
, arg
= arg0
; arg
&& eformal
;
2312 arg
= arg
->next
, eformal
= eformal
->next
)
2313 if ((eformal
->sym
->attr
.intent
== INTENT_OUT
2314 || eformal
->sym
->attr
.intent
== INTENT_INOUT
)
2315 && arg
->expr
&& arg
->expr
->rank
== 0)
2317 gfc_error ("Actual argument at %L for INTENT(%s) dummy %qs of "
2318 "ELEMENTAL subroutine %qs is a scalar, but another "
2319 "actual argument is an array", &arg
->expr
->where
,
2320 (eformal
->sym
->attr
.intent
== INTENT_OUT
) ? "OUT"
2321 : "INOUT", eformal
->sym
->name
, esym
->name
);
2328 /* This function does the checking of references to global procedures
2329 as defined in sections 18.1 and 14.1, respectively, of the Fortran
2330 77 and 95 standards. It checks for a gsymbol for the name, making
2331 one if it does not already exist. If it already exists, then the
2332 reference being resolved must correspond to the type of gsymbol.
2333 Otherwise, the new symbol is equipped with the attributes of the
2334 reference. The corresponding code that is called in creating
2335 global entities is parse.c.
2337 In addition, for all but -std=legacy, the gsymbols are used to
2338 check the interfaces of external procedures from the same file.
2339 The namespace of the gsymbol is resolved and then, once this is
2340 done the interface is checked. */
2344 not_in_recursive (gfc_symbol
*sym
, gfc_namespace
*gsym_ns
)
2346 if (!gsym_ns
->proc_name
->attr
.recursive
)
2349 if (sym
->ns
== gsym_ns
)
2352 if (sym
->ns
->parent
&& sym
->ns
->parent
== gsym_ns
)
2359 not_entry_self_reference (gfc_symbol
*sym
, gfc_namespace
*gsym_ns
)
2361 if (gsym_ns
->entries
)
2363 gfc_entry_list
*entry
= gsym_ns
->entries
;
2365 for (; entry
; entry
= entry
->next
)
2367 if (strcmp (sym
->name
, entry
->sym
->name
) == 0)
2369 if (strcmp (gsym_ns
->proc_name
->name
,
2370 sym
->ns
->proc_name
->name
) == 0)
2374 && strcmp (gsym_ns
->proc_name
->name
,
2375 sym
->ns
->parent
->proc_name
->name
) == 0)
2384 /* Check for the requirement of an explicit interface. F08:12.4.2.2. */
2387 gfc_explicit_interface_required (gfc_symbol
*sym
, char *errmsg
, int err_len
)
2389 gfc_formal_arglist
*arg
= gfc_sym_get_dummy_args (sym
);
2391 for ( ; arg
; arg
= arg
->next
)
2396 if (arg
->sym
->attr
.allocatable
) /* (2a) */
2398 strncpy (errmsg
, _("allocatable argument"), err_len
);
2401 else if (arg
->sym
->attr
.asynchronous
)
2403 strncpy (errmsg
, _("asynchronous argument"), err_len
);
2406 else if (arg
->sym
->attr
.optional
)
2408 strncpy (errmsg
, _("optional argument"), err_len
);
2411 else if (arg
->sym
->attr
.pointer
)
2413 strncpy (errmsg
, _("pointer argument"), err_len
);
2416 else if (arg
->sym
->attr
.target
)
2418 strncpy (errmsg
, _("target argument"), err_len
);
2421 else if (arg
->sym
->attr
.value
)
2423 strncpy (errmsg
, _("value argument"), err_len
);
2426 else if (arg
->sym
->attr
.volatile_
)
2428 strncpy (errmsg
, _("volatile argument"), err_len
);
2431 else if (arg
->sym
->as
&& arg
->sym
->as
->type
== AS_ASSUMED_SHAPE
) /* (2b) */
2433 strncpy (errmsg
, _("assumed-shape argument"), err_len
);
2436 else if (arg
->sym
->as
&& arg
->sym
->as
->type
== AS_ASSUMED_RANK
) /* TS 29113, 6.2. */
2438 strncpy (errmsg
, _("assumed-rank argument"), err_len
);
2441 else if (arg
->sym
->attr
.codimension
) /* (2c) */
2443 strncpy (errmsg
, _("coarray argument"), err_len
);
2446 else if (false) /* (2d) TODO: parametrized derived type */
2448 strncpy (errmsg
, _("parametrized derived type argument"), err_len
);
2451 else if (arg
->sym
->ts
.type
== BT_CLASS
) /* (2e) */
2453 strncpy (errmsg
, _("polymorphic argument"), err_len
);
2456 else if (arg
->sym
->attr
.ext_attr
& (1 << EXT_ATTR_NO_ARG_CHECK
))
2458 strncpy (errmsg
, _("NO_ARG_CHECK attribute"), err_len
);
2461 else if (arg
->sym
->ts
.type
== BT_ASSUMED
)
2463 /* As assumed-type is unlimited polymorphic (cf. above).
2464 See also TS 29113, Note 6.1. */
2465 strncpy (errmsg
, _("assumed-type argument"), err_len
);
2470 if (sym
->attr
.function
)
2472 gfc_symbol
*res
= sym
->result
? sym
->result
: sym
;
2474 if (res
->attr
.dimension
) /* (3a) */
2476 strncpy (errmsg
, _("array result"), err_len
);
2479 else if (res
->attr
.pointer
|| res
->attr
.allocatable
) /* (3b) */
2481 strncpy (errmsg
, _("pointer or allocatable result"), err_len
);
2484 else if (res
->ts
.type
== BT_CHARACTER
&& res
->ts
.u
.cl
2485 && res
->ts
.u
.cl
->length
2486 && res
->ts
.u
.cl
->length
->expr_type
!= EXPR_CONSTANT
) /* (3c) */
2488 strncpy (errmsg
, _("result with non-constant character length"), err_len
);
2493 if (sym
->attr
.elemental
&& !sym
->attr
.intrinsic
) /* (4) */
2495 strncpy (errmsg
, _("elemental procedure"), err_len
);
2498 else if (sym
->attr
.is_bind_c
) /* (5) */
2500 strncpy (errmsg
, _("bind(c) procedure"), err_len
);
2509 resolve_global_procedure (gfc_symbol
*sym
, locus
*where
,
2510 gfc_actual_arglist
**actual
, int sub
)
2514 enum gfc_symbol_type type
;
2517 type
= sub
? GSYM_SUBROUTINE
: GSYM_FUNCTION
;
2519 gsym
= gfc_get_gsymbol (sym
->binding_label
? sym
->binding_label
: sym
->name
,
2520 sym
->binding_label
!= NULL
);
2522 if ((gsym
->type
!= GSYM_UNKNOWN
&& gsym
->type
!= type
))
2523 gfc_global_used (gsym
, where
);
2525 if ((sym
->attr
.if_source
== IFSRC_UNKNOWN
2526 || sym
->attr
.if_source
== IFSRC_IFBODY
)
2527 && gsym
->type
!= GSYM_UNKNOWN
2528 && !gsym
->binding_label
2530 && gsym
->ns
->proc_name
2531 && not_in_recursive (sym
, gsym
->ns
)
2532 && not_entry_self_reference (sym
, gsym
->ns
))
2534 gfc_symbol
*def_sym
;
2535 def_sym
= gsym
->ns
->proc_name
;
2537 if (gsym
->ns
->resolved
!= -1)
2540 /* Resolve the gsymbol namespace if needed. */
2541 if (!gsym
->ns
->resolved
)
2543 gfc_symbol
*old_dt_list
;
2545 /* Stash away derived types so that the backend_decls
2546 do not get mixed up. */
2547 old_dt_list
= gfc_derived_types
;
2548 gfc_derived_types
= NULL
;
2550 gfc_resolve (gsym
->ns
);
2552 /* Store the new derived types with the global namespace. */
2553 if (gfc_derived_types
)
2554 gsym
->ns
->derived_types
= gfc_derived_types
;
2556 /* Restore the derived types of this namespace. */
2557 gfc_derived_types
= old_dt_list
;
2560 /* Make sure that translation for the gsymbol occurs before
2561 the procedure currently being resolved. */
2562 ns
= gfc_global_ns_list
;
2563 for (; ns
&& ns
!= gsym
->ns
; ns
= ns
->sibling
)
2565 if (ns
->sibling
== gsym
->ns
)
2567 ns
->sibling
= gsym
->ns
->sibling
;
2568 gsym
->ns
->sibling
= gfc_global_ns_list
;
2569 gfc_global_ns_list
= gsym
->ns
;
2574 /* This can happen if a binding name has been specified. */
2575 if (gsym
->binding_label
&& gsym
->sym_name
!= def_sym
->name
)
2576 gfc_find_symbol (gsym
->sym_name
, gsym
->ns
, 0, &def_sym
);
2578 if (def_sym
->attr
.entry_master
|| def_sym
->attr
.entry
)
2580 gfc_entry_list
*entry
;
2581 for (entry
= gsym
->ns
->entries
; entry
; entry
= entry
->next
)
2582 if (strcmp (entry
->sym
->name
, sym
->name
) == 0)
2584 def_sym
= entry
->sym
;
2590 if (sym
->attr
.function
&& !gfc_compare_types (&sym
->ts
, &def_sym
->ts
))
2592 gfc_error ("Return type mismatch of function %qs at %L (%s/%s)",
2593 sym
->name
, &sym
->declared_at
, gfc_typename (&sym
->ts
),
2594 gfc_typename (&def_sym
->ts
));
2598 if (sym
->attr
.if_source
== IFSRC_UNKNOWN
2599 && gfc_explicit_interface_required (def_sym
, reason
, sizeof(reason
)))
2601 gfc_error ("Explicit interface required for %qs at %L: %s",
2602 sym
->name
, &sym
->declared_at
, reason
);
2606 if (!pedantic
&& (gfc_option
.allow_std
& GFC_STD_GNU
))
2607 /* Turn erros into warnings with -std=gnu and -std=legacy. */
2608 gfc_errors_to_warnings (true);
2610 if (!gfc_compare_interfaces (sym
, def_sym
, sym
->name
, 0, 1,
2611 reason
, sizeof(reason
), NULL
, NULL
))
2613 gfc_error_opt (OPT_Wargument_mismatch
,
2614 "Interface mismatch in global procedure %qs at %L:"
2615 " %s", sym
->name
, &sym
->declared_at
, reason
);
2620 || ((gfc_option
.warn_std
& GFC_STD_LEGACY
)
2621 && !(gfc_option
.warn_std
& GFC_STD_GNU
)))
2622 gfc_errors_to_warnings (true);
2624 if (sym
->attr
.if_source
!= IFSRC_IFBODY
)
2625 gfc_procedure_use (def_sym
, actual
, where
);
2629 gfc_errors_to_warnings (false);
2631 if (gsym
->type
== GSYM_UNKNOWN
)
2634 gsym
->where
= *where
;
2641 /************* Function resolution *************/
2643 /* Resolve a function call known to be generic.
2644 Section 14.1.2.4.1. */
2647 resolve_generic_f0 (gfc_expr
*expr
, gfc_symbol
*sym
)
2651 if (sym
->attr
.generic
)
2653 s
= gfc_search_interface (sym
->generic
, 0, &expr
->value
.function
.actual
);
2656 expr
->value
.function
.name
= s
->name
;
2657 expr
->value
.function
.esym
= s
;
2659 if (s
->ts
.type
!= BT_UNKNOWN
)
2661 else if (s
->result
!= NULL
&& s
->result
->ts
.type
!= BT_UNKNOWN
)
2662 expr
->ts
= s
->result
->ts
;
2665 expr
->rank
= s
->as
->rank
;
2666 else if (s
->result
!= NULL
&& s
->result
->as
!= NULL
)
2667 expr
->rank
= s
->result
->as
->rank
;
2669 gfc_set_sym_referenced (expr
->value
.function
.esym
);
2674 /* TODO: Need to search for elemental references in generic
2678 if (sym
->attr
.intrinsic
)
2679 return gfc_intrinsic_func_interface (expr
, 0);
2686 resolve_generic_f (gfc_expr
*expr
)
2690 gfc_interface
*intr
= NULL
;
2692 sym
= expr
->symtree
->n
.sym
;
2696 m
= resolve_generic_f0 (expr
, sym
);
2699 else if (m
== MATCH_ERROR
)
2704 for (intr
= sym
->generic
; intr
; intr
= intr
->next
)
2705 if (gfc_fl_struct (intr
->sym
->attr
.flavor
))
2708 if (sym
->ns
->parent
== NULL
)
2710 gfc_find_symbol (sym
->name
, sym
->ns
->parent
, 1, &sym
);
2714 if (!generic_sym (sym
))
2718 /* Last ditch attempt. See if the reference is to an intrinsic
2719 that possesses a matching interface. 14.1.2.4 */
2720 if (sym
&& !intr
&& !gfc_is_intrinsic (sym
, 0, expr
->where
))
2722 if (gfc_init_expr_flag
)
2723 gfc_error ("Function %qs in initialization expression at %L "
2724 "must be an intrinsic function",
2725 expr
->symtree
->n
.sym
->name
, &expr
->where
);
2727 gfc_error ("There is no specific function for the generic %qs "
2728 "at %L", expr
->symtree
->n
.sym
->name
, &expr
->where
);
2734 if (!gfc_convert_to_structure_constructor (expr
, intr
->sym
, NULL
,
2737 if (!gfc_use_derived (expr
->ts
.u
.derived
))
2739 return resolve_structure_cons (expr
, 0);
2742 m
= gfc_intrinsic_func_interface (expr
, 0);
2747 gfc_error ("Generic function %qs at %L is not consistent with a "
2748 "specific intrinsic interface", expr
->symtree
->n
.sym
->name
,
2755 /* Resolve a function call known to be specific. */
2758 resolve_specific_f0 (gfc_symbol
*sym
, gfc_expr
*expr
)
2762 if (sym
->attr
.external
|| sym
->attr
.if_source
== IFSRC_IFBODY
)
2764 if (sym
->attr
.dummy
)
2766 sym
->attr
.proc
= PROC_DUMMY
;
2770 sym
->attr
.proc
= PROC_EXTERNAL
;
2774 if (sym
->attr
.proc
== PROC_MODULE
2775 || sym
->attr
.proc
== PROC_ST_FUNCTION
2776 || sym
->attr
.proc
== PROC_INTERNAL
)
2779 if (sym
->attr
.intrinsic
)
2781 m
= gfc_intrinsic_func_interface (expr
, 1);
2785 gfc_error ("Function %qs at %L is INTRINSIC but is not compatible "
2786 "with an intrinsic", sym
->name
, &expr
->where
);
2794 gfc_procedure_use (sym
, &expr
->value
.function
.actual
, &expr
->where
);
2797 expr
->ts
= sym
->result
->ts
;
2800 expr
->value
.function
.name
= sym
->name
;
2801 expr
->value
.function
.esym
= sym
;
2802 /* Prevent crash when sym->ts.u.derived->components is not set due to previous
2804 if (sym
->ts
.type
== BT_CLASS
&& !CLASS_DATA (sym
))
2806 if (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
)->as
)
2807 expr
->rank
= CLASS_DATA (sym
)->as
->rank
;
2808 else if (sym
->as
!= NULL
)
2809 expr
->rank
= sym
->as
->rank
;
2816 resolve_specific_f (gfc_expr
*expr
)
2821 sym
= expr
->symtree
->n
.sym
;
2825 m
= resolve_specific_f0 (sym
, expr
);
2828 if (m
== MATCH_ERROR
)
2831 if (sym
->ns
->parent
== NULL
)
2834 gfc_find_symbol (sym
->name
, sym
->ns
->parent
, 1, &sym
);
2840 gfc_error ("Unable to resolve the specific function %qs at %L",
2841 expr
->symtree
->n
.sym
->name
, &expr
->where
);
2846 /* Recursively append candidate SYM to CANDIDATES. Store the number of
2847 candidates in CANDIDATES_LEN. */
2850 lookup_function_fuzzy_find_candidates (gfc_symtree
*sym
,
2852 size_t &candidates_len
)
2858 if ((sym
->n
.sym
->ts
.type
!= BT_UNKNOWN
|| sym
->n
.sym
->attr
.external
)
2859 && sym
->n
.sym
->attr
.flavor
== FL_PROCEDURE
)
2860 vec_push (candidates
, candidates_len
, sym
->name
);
2864 lookup_function_fuzzy_find_candidates (p
, candidates
, candidates_len
);
2868 lookup_function_fuzzy_find_candidates (p
, candidates
, candidates_len
);
2872 /* Lookup function FN fuzzily, taking names in SYMROOT into account. */
2875 gfc_lookup_function_fuzzy (const char *fn
, gfc_symtree
*symroot
)
2877 char **candidates
= NULL
;
2878 size_t candidates_len
= 0;
2879 lookup_function_fuzzy_find_candidates (symroot
, candidates
, candidates_len
);
2880 return gfc_closest_fuzzy_match (fn
, candidates
);
2884 /* Resolve a procedure call not known to be generic nor specific. */
2887 resolve_unknown_f (gfc_expr
*expr
)
2892 sym
= expr
->symtree
->n
.sym
;
2894 if (sym
->attr
.dummy
)
2896 sym
->attr
.proc
= PROC_DUMMY
;
2897 expr
->value
.function
.name
= sym
->name
;
2901 /* See if we have an intrinsic function reference. */
2903 if (gfc_is_intrinsic (sym
, 0, expr
->where
))
2905 if (gfc_intrinsic_func_interface (expr
, 1) == MATCH_YES
)
2910 /* The reference is to an external name. */
2912 sym
->attr
.proc
= PROC_EXTERNAL
;
2913 expr
->value
.function
.name
= sym
->name
;
2914 expr
->value
.function
.esym
= expr
->symtree
->n
.sym
;
2916 if (sym
->as
!= NULL
)
2917 expr
->rank
= sym
->as
->rank
;
2919 /* Type of the expression is either the type of the symbol or the
2920 default type of the symbol. */
2923 gfc_procedure_use (sym
, &expr
->value
.function
.actual
, &expr
->where
);
2925 if (sym
->ts
.type
!= BT_UNKNOWN
)
2929 ts
= gfc_get_default_type (sym
->name
, sym
->ns
);
2931 if (ts
->type
== BT_UNKNOWN
)
2934 = gfc_lookup_function_fuzzy (sym
->name
, sym
->ns
->sym_root
);
2936 gfc_error ("Function %qs at %L has no IMPLICIT type"
2937 "; did you mean %qs?",
2938 sym
->name
, &expr
->where
, guessed
);
2940 gfc_error ("Function %qs at %L has no IMPLICIT type",
2941 sym
->name
, &expr
->where
);
2952 /* Return true, if the symbol is an external procedure. */
2954 is_external_proc (gfc_symbol
*sym
)
2956 if (!sym
->attr
.dummy
&& !sym
->attr
.contained
2957 && !gfc_is_intrinsic (sym
, sym
->attr
.subroutine
, sym
->declared_at
)
2958 && sym
->attr
.proc
!= PROC_ST_FUNCTION
2959 && !sym
->attr
.proc_pointer
2960 && !sym
->attr
.use_assoc
2968 /* Figure out if a function reference is pure or not. Also set the name
2969 of the function for a potential error message. Return nonzero if the
2970 function is PURE, zero if not. */
2972 pure_stmt_function (gfc_expr
*, gfc_symbol
*);
2975 gfc_pure_function (gfc_expr
*e
, const char **name
)
2978 gfc_component
*comp
;
2982 if (e
->symtree
!= NULL
2983 && e
->symtree
->n
.sym
!= NULL
2984 && e
->symtree
->n
.sym
->attr
.proc
== PROC_ST_FUNCTION
)
2985 return pure_stmt_function (e
, e
->symtree
->n
.sym
);
2987 comp
= gfc_get_proc_ptr_comp (e
);
2990 pure
= gfc_pure (comp
->ts
.interface
);
2993 else if (e
->value
.function
.esym
)
2995 pure
= gfc_pure (e
->value
.function
.esym
);
2996 *name
= e
->value
.function
.esym
->name
;
2998 else if (e
->value
.function
.isym
)
3000 pure
= e
->value
.function
.isym
->pure
3001 || e
->value
.function
.isym
->elemental
;
3002 *name
= e
->value
.function
.isym
->name
;
3006 /* Implicit functions are not pure. */
3008 *name
= e
->value
.function
.name
;
3015 /* Check if the expression is a reference to an implicitly pure function. */
3018 gfc_implicit_pure_function (gfc_expr
*e
)
3020 gfc_component
*comp
= gfc_get_proc_ptr_comp (e
);
3022 return gfc_implicit_pure (comp
->ts
.interface
);
3023 else if (e
->value
.function
.esym
)
3024 return gfc_implicit_pure (e
->value
.function
.esym
);
3031 impure_stmt_fcn (gfc_expr
*e
, gfc_symbol
*sym
,
3032 int *f ATTRIBUTE_UNUSED
)
3036 /* Don't bother recursing into other statement functions
3037 since they will be checked individually for purity. */
3038 if (e
->expr_type
!= EXPR_FUNCTION
3040 || e
->symtree
->n
.sym
== sym
3041 || e
->symtree
->n
.sym
->attr
.proc
== PROC_ST_FUNCTION
)
3044 return gfc_pure_function (e
, &name
) ? false : true;
3049 pure_stmt_function (gfc_expr
*e
, gfc_symbol
*sym
)
3051 return gfc_traverse_expr (e
, sym
, impure_stmt_fcn
, 0) ? 0 : 1;
3055 /* Check if an impure function is allowed in the current context. */
3057 static bool check_pure_function (gfc_expr
*e
)
3059 const char *name
= NULL
;
3060 if (!gfc_pure_function (e
, &name
) && name
)
3064 gfc_error ("Reference to impure function %qs at %L inside a "
3065 "FORALL %s", name
, &e
->where
,
3066 forall_flag
== 2 ? "mask" : "block");
3069 else if (gfc_do_concurrent_flag
)
3071 gfc_error ("Reference to impure function %qs at %L inside a "
3072 "DO CONCURRENT %s", name
, &e
->where
,
3073 gfc_do_concurrent_flag
== 2 ? "mask" : "block");
3076 else if (gfc_pure (NULL
))
3078 gfc_error ("Reference to impure function %qs at %L "
3079 "within a PURE procedure", name
, &e
->where
);
3082 if (!gfc_implicit_pure_function (e
))
3083 gfc_unset_implicit_pure (NULL
);
3089 /* Update current procedure's array_outer_dependency flag, considering
3090 a call to procedure SYM. */
3093 update_current_proc_array_outer_dependency (gfc_symbol
*sym
)
3095 /* Check to see if this is a sibling function that has not yet
3097 gfc_namespace
*sibling
= gfc_current_ns
->sibling
;
3098 for (; sibling
; sibling
= sibling
->sibling
)
3100 if (sibling
->proc_name
== sym
)
3102 gfc_resolve (sibling
);
3107 /* If SYM has references to outer arrays, so has the procedure calling
3108 SYM. If SYM is a procedure pointer, we can assume the worst. */
3109 if ((sym
->attr
.array_outer_dependency
|| sym
->attr
.proc_pointer
)
3110 && gfc_current_ns
->proc_name
)
3111 gfc_current_ns
->proc_name
->attr
.array_outer_dependency
= 1;
3115 /* Resolve a function call, which means resolving the arguments, then figuring
3116 out which entity the name refers to. */
3119 resolve_function (gfc_expr
*expr
)
3121 gfc_actual_arglist
*arg
;
3125 procedure_type p
= PROC_INTRINSIC
;
3126 bool no_formal_args
;
3130 sym
= expr
->symtree
->n
.sym
;
3132 /* If this is a procedure pointer component, it has already been resolved. */
3133 if (gfc_is_proc_ptr_comp (expr
))
3136 /* Avoid re-resolving the arguments of caf_get, which can lead to inserting
3138 if (sym
&& sym
->attr
.intrinsic
3139 && (sym
->intmod_sym_id
== GFC_ISYM_CAF_GET
3140 || sym
->intmod_sym_id
== GFC_ISYM_CAF_SEND
))
3143 if (sym
&& sym
->attr
.intrinsic
3144 && !gfc_resolve_intrinsic (sym
, &expr
->where
))
3147 if (sym
&& (sym
->attr
.flavor
== FL_VARIABLE
|| sym
->attr
.subroutine
))
3149 gfc_error ("%qs at %L is not a function", sym
->name
, &expr
->where
);
3153 /* If this is a deferred TBP with an abstract interface (which may
3154 of course be referenced), expr->value.function.esym will be set. */
3155 if (sym
&& sym
->attr
.abstract
&& !expr
->value
.function
.esym
)
3157 gfc_error ("ABSTRACT INTERFACE %qs must not be referenced at %L",
3158 sym
->name
, &expr
->where
);
3162 /* If this is a deferred TBP with an abstract interface, its result
3163 cannot be an assumed length character (F2003: C418). */
3164 if (sym
&& sym
->attr
.abstract
&& sym
->attr
.function
3165 && sym
->result
->ts
.u
.cl
3166 && sym
->result
->ts
.u
.cl
->length
== NULL
3167 && !sym
->result
->ts
.deferred
)
3169 gfc_error ("ABSTRACT INTERFACE %qs at %L must not have an assumed "
3170 "character length result (F2008: C418)", sym
->name
,
3175 /* Switch off assumed size checking and do this again for certain kinds
3176 of procedure, once the procedure itself is resolved. */
3177 need_full_assumed_size
++;
3179 if (expr
->symtree
&& expr
->symtree
->n
.sym
)
3180 p
= expr
->symtree
->n
.sym
->attr
.proc
;
3182 if (expr
->value
.function
.isym
&& expr
->value
.function
.isym
->inquiry
)
3183 inquiry_argument
= true;
3184 no_formal_args
= sym
&& is_external_proc (sym
)
3185 && gfc_sym_get_dummy_args (sym
) == NULL
;
3187 if (!resolve_actual_arglist (expr
->value
.function
.actual
,
3190 inquiry_argument
= false;
3194 inquiry_argument
= false;
3196 /* Resume assumed_size checking. */
3197 need_full_assumed_size
--;
3199 /* If the procedure is external, check for usage. */
3200 if (sym
&& is_external_proc (sym
))
3201 resolve_global_procedure (sym
, &expr
->where
,
3202 &expr
->value
.function
.actual
, 0);
3204 if (sym
&& sym
->ts
.type
== BT_CHARACTER
3206 && sym
->ts
.u
.cl
->length
== NULL
3208 && !sym
->ts
.deferred
3209 && expr
->value
.function
.esym
== NULL
3210 && !sym
->attr
.contained
)
3212 /* Internal procedures are taken care of in resolve_contained_fntype. */
3213 gfc_error ("Function %qs is declared CHARACTER(*) and cannot "
3214 "be used at %L since it is not a dummy argument",
3215 sym
->name
, &expr
->where
);
3219 /* See if function is already resolved. */
3221 if (expr
->value
.function
.name
!= NULL
3222 || expr
->value
.function
.isym
!= NULL
)
3224 if (expr
->ts
.type
== BT_UNKNOWN
)
3230 /* Apply the rules of section 14.1.2. */
3232 switch (procedure_kind (sym
))
3235 t
= resolve_generic_f (expr
);
3238 case PTYPE_SPECIFIC
:
3239 t
= resolve_specific_f (expr
);
3243 t
= resolve_unknown_f (expr
);
3247 gfc_internal_error ("resolve_function(): bad function type");
3251 /* If the expression is still a function (it might have simplified),
3252 then we check to see if we are calling an elemental function. */
3254 if (expr
->expr_type
!= EXPR_FUNCTION
)
3257 temp
= need_full_assumed_size
;
3258 need_full_assumed_size
= 0;
3260 if (!resolve_elemental_actual (expr
, NULL
))
3263 if (omp_workshare_flag
3264 && expr
->value
.function
.esym
3265 && ! gfc_elemental (expr
->value
.function
.esym
))
3267 gfc_error ("User defined non-ELEMENTAL function %qs at %L not allowed "
3268 "in WORKSHARE construct", expr
->value
.function
.esym
->name
,
3273 #define GENERIC_ID expr->value.function.isym->id
3274 else if (expr
->value
.function
.actual
!= NULL
3275 && expr
->value
.function
.isym
!= NULL
3276 && GENERIC_ID
!= GFC_ISYM_LBOUND
3277 && GENERIC_ID
!= GFC_ISYM_LCOBOUND
3278 && GENERIC_ID
!= GFC_ISYM_UCOBOUND
3279 && GENERIC_ID
!= GFC_ISYM_LEN
3280 && GENERIC_ID
!= GFC_ISYM_LOC
3281 && GENERIC_ID
!= GFC_ISYM_C_LOC
3282 && GENERIC_ID
!= GFC_ISYM_PRESENT
)
3284 /* Array intrinsics must also have the last upper bound of an
3285 assumed size array argument. UBOUND and SIZE have to be
3286 excluded from the check if the second argument is anything
3289 for (arg
= expr
->value
.function
.actual
; arg
; arg
= arg
->next
)
3291 if ((GENERIC_ID
== GFC_ISYM_UBOUND
|| GENERIC_ID
== GFC_ISYM_SIZE
)
3292 && arg
== expr
->value
.function
.actual
3293 && arg
->next
!= NULL
&& arg
->next
->expr
)
3295 if (arg
->next
->expr
->expr_type
!= EXPR_CONSTANT
)
3298 if (arg
->next
->name
&& strcmp (arg
->next
->name
, "kind") == 0)
3301 if ((int)mpz_get_si (arg
->next
->expr
->value
.integer
)
3306 if (arg
->expr
!= NULL
3307 && arg
->expr
->rank
> 0
3308 && resolve_assumed_size_actual (arg
->expr
))
3314 need_full_assumed_size
= temp
;
3316 if (!check_pure_function(expr
))
3319 /* Functions without the RECURSIVE attribution are not allowed to
3320 * call themselves. */
3321 if (expr
->value
.function
.esym
&& !expr
->value
.function
.esym
->attr
.recursive
)
3324 esym
= expr
->value
.function
.esym
;
3326 if (is_illegal_recursion (esym
, gfc_current_ns
))
3328 if (esym
->attr
.entry
&& esym
->ns
->entries
)
3329 gfc_error ("ENTRY %qs at %L cannot be called recursively, as"
3330 " function %qs is not RECURSIVE",
3331 esym
->name
, &expr
->where
, esym
->ns
->entries
->sym
->name
);
3333 gfc_error ("Function %qs at %L cannot be called recursively, as it"
3334 " is not RECURSIVE", esym
->name
, &expr
->where
);
3340 /* Character lengths of use associated functions may contains references to
3341 symbols not referenced from the current program unit otherwise. Make sure
3342 those symbols are marked as referenced. */
3344 if (expr
->ts
.type
== BT_CHARACTER
&& expr
->value
.function
.esym
3345 && expr
->value
.function
.esym
->attr
.use_assoc
)
3347 gfc_expr_set_symbols_referenced (expr
->ts
.u
.cl
->length
);
3350 /* Make sure that the expression has a typespec that works. */
3351 if (expr
->ts
.type
== BT_UNKNOWN
)
3353 if (expr
->symtree
->n
.sym
->result
3354 && expr
->symtree
->n
.sym
->result
->ts
.type
!= BT_UNKNOWN
3355 && !expr
->symtree
->n
.sym
->result
->attr
.proc_pointer
)
3356 expr
->ts
= expr
->symtree
->n
.sym
->result
->ts
;
3359 if (!expr
->ref
&& !expr
->value
.function
.isym
)
3361 if (expr
->value
.function
.esym
)
3362 update_current_proc_array_outer_dependency (expr
->value
.function
.esym
);
3364 update_current_proc_array_outer_dependency (sym
);
3367 /* typebound procedure: Assume the worst. */
3368 gfc_current_ns
->proc_name
->attr
.array_outer_dependency
= 1;
3374 /************* Subroutine resolution *************/
3377 pure_subroutine (gfc_symbol
*sym
, const char *name
, locus
*loc
)
3384 gfc_error ("Subroutine call to %qs in FORALL block at %L is not PURE",
3388 else if (gfc_do_concurrent_flag
)
3390 gfc_error ("Subroutine call to %qs in DO CONCURRENT block at %L is not "
3394 else if (gfc_pure (NULL
))
3396 gfc_error ("Subroutine call to %qs at %L is not PURE", name
, loc
);
3400 gfc_unset_implicit_pure (NULL
);
3406 resolve_generic_s0 (gfc_code
*c
, gfc_symbol
*sym
)
3410 if (sym
->attr
.generic
)
3412 s
= gfc_search_interface (sym
->generic
, 1, &c
->ext
.actual
);
3415 c
->resolved_sym
= s
;
3416 if (!pure_subroutine (s
, s
->name
, &c
->loc
))
3421 /* TODO: Need to search for elemental references in generic interface. */
3424 if (sym
->attr
.intrinsic
)
3425 return gfc_intrinsic_sub_interface (c
, 0);
3432 resolve_generic_s (gfc_code
*c
)
3437 sym
= c
->symtree
->n
.sym
;
3441 m
= resolve_generic_s0 (c
, sym
);
3444 else if (m
== MATCH_ERROR
)
3448 if (sym
->ns
->parent
== NULL
)
3450 gfc_find_symbol (sym
->name
, sym
->ns
->parent
, 1, &sym
);
3454 if (!generic_sym (sym
))
3458 /* Last ditch attempt. See if the reference is to an intrinsic
3459 that possesses a matching interface. 14.1.2.4 */
3460 sym
= c
->symtree
->n
.sym
;
3462 if (!gfc_is_intrinsic (sym
, 1, c
->loc
))
3464 gfc_error ("There is no specific subroutine for the generic %qs at %L",
3465 sym
->name
, &c
->loc
);
3469 m
= gfc_intrinsic_sub_interface (c
, 0);
3473 gfc_error ("Generic subroutine %qs at %L is not consistent with an "
3474 "intrinsic subroutine interface", sym
->name
, &c
->loc
);
3480 /* Resolve a subroutine call known to be specific. */
3483 resolve_specific_s0 (gfc_code
*c
, gfc_symbol
*sym
)
3487 if (sym
->attr
.external
|| sym
->attr
.if_source
== IFSRC_IFBODY
)
3489 if (sym
->attr
.dummy
)
3491 sym
->attr
.proc
= PROC_DUMMY
;
3495 sym
->attr
.proc
= PROC_EXTERNAL
;
3499 if (sym
->attr
.proc
== PROC_MODULE
|| sym
->attr
.proc
== PROC_INTERNAL
)
3502 if (sym
->attr
.intrinsic
)
3504 m
= gfc_intrinsic_sub_interface (c
, 1);
3508 gfc_error ("Subroutine %qs at %L is INTRINSIC but is not compatible "
3509 "with an intrinsic", sym
->name
, &c
->loc
);
3517 gfc_procedure_use (sym
, &c
->ext
.actual
, &c
->loc
);
3519 c
->resolved_sym
= sym
;
3520 if (!pure_subroutine (sym
, sym
->name
, &c
->loc
))
3528 resolve_specific_s (gfc_code
*c
)
3533 sym
= c
->symtree
->n
.sym
;
3537 m
= resolve_specific_s0 (c
, sym
);
3540 if (m
== MATCH_ERROR
)
3543 if (sym
->ns
->parent
== NULL
)
3546 gfc_find_symbol (sym
->name
, sym
->ns
->parent
, 1, &sym
);
3552 sym
= c
->symtree
->n
.sym
;
3553 gfc_error ("Unable to resolve the specific subroutine %qs at %L",
3554 sym
->name
, &c
->loc
);
3560 /* Resolve a subroutine call not known to be generic nor specific. */
3563 resolve_unknown_s (gfc_code
*c
)
3567 sym
= c
->symtree
->n
.sym
;
3569 if (sym
->attr
.dummy
)
3571 sym
->attr
.proc
= PROC_DUMMY
;
3575 /* See if we have an intrinsic function reference. */
3577 if (gfc_is_intrinsic (sym
, 1, c
->loc
))
3579 if (gfc_intrinsic_sub_interface (c
, 1) == MATCH_YES
)
3584 /* The reference is to an external name. */
3587 gfc_procedure_use (sym
, &c
->ext
.actual
, &c
->loc
);
3589 c
->resolved_sym
= sym
;
3591 return pure_subroutine (sym
, sym
->name
, &c
->loc
);
3595 /* Resolve a subroutine call. Although it was tempting to use the same code
3596 for functions, subroutines and functions are stored differently and this
3597 makes things awkward. */
3600 resolve_call (gfc_code
*c
)
3603 procedure_type ptype
= PROC_INTRINSIC
;
3604 gfc_symbol
*csym
, *sym
;
3605 bool no_formal_args
;
3607 csym
= c
->symtree
? c
->symtree
->n
.sym
: NULL
;
3609 if (csym
&& csym
->ts
.type
!= BT_UNKNOWN
)
3611 gfc_error ("%qs at %L has a type, which is not consistent with "
3612 "the CALL at %L", csym
->name
, &csym
->declared_at
, &c
->loc
);
3616 if (csym
&& gfc_current_ns
->parent
&& csym
->ns
!= gfc_current_ns
)
3619 gfc_find_sym_tree (c
->symtree
->name
, gfc_current_ns
, 1, &st
);
3620 sym
= st
? st
->n
.sym
: NULL
;
3621 if (sym
&& csym
!= sym
3622 && sym
->ns
== gfc_current_ns
3623 && sym
->attr
.flavor
== FL_PROCEDURE
3624 && sym
->attr
.contained
)
3627 if (csym
->attr
.generic
)
3628 c
->symtree
->n
.sym
= sym
;
3631 csym
= c
->symtree
->n
.sym
;
3635 /* If this ia a deferred TBP, c->expr1 will be set. */
3636 if (!c
->expr1
&& csym
)
3638 if (csym
->attr
.abstract
)
3640 gfc_error ("ABSTRACT INTERFACE %qs must not be referenced at %L",
3641 csym
->name
, &c
->loc
);
3645 /* Subroutines without the RECURSIVE attribution are not allowed to
3647 if (is_illegal_recursion (csym
, gfc_current_ns
))
3649 if (csym
->attr
.entry
&& csym
->ns
->entries
)
3650 gfc_error ("ENTRY %qs at %L cannot be called recursively, "
3651 "as subroutine %qs is not RECURSIVE",
3652 csym
->name
, &c
->loc
, csym
->ns
->entries
->sym
->name
);
3654 gfc_error ("SUBROUTINE %qs at %L cannot be called recursively, "
3655 "as it is not RECURSIVE", csym
->name
, &c
->loc
);
3661 /* Switch off assumed size checking and do this again for certain kinds
3662 of procedure, once the procedure itself is resolved. */
3663 need_full_assumed_size
++;
3666 ptype
= csym
->attr
.proc
;
3668 no_formal_args
= csym
&& is_external_proc (csym
)
3669 && gfc_sym_get_dummy_args (csym
) == NULL
;
3670 if (!resolve_actual_arglist (c
->ext
.actual
, ptype
, no_formal_args
))
3673 /* Resume assumed_size checking. */
3674 need_full_assumed_size
--;
3676 /* If external, check for usage. */
3677 if (csym
&& is_external_proc (csym
))
3678 resolve_global_procedure (csym
, &c
->loc
, &c
->ext
.actual
, 1);
3681 if (c
->resolved_sym
== NULL
)
3683 c
->resolved_isym
= NULL
;
3684 switch (procedure_kind (csym
))
3687 t
= resolve_generic_s (c
);
3690 case PTYPE_SPECIFIC
:
3691 t
= resolve_specific_s (c
);
3695 t
= resolve_unknown_s (c
);
3699 gfc_internal_error ("resolve_subroutine(): bad function type");
3703 /* Some checks of elemental subroutine actual arguments. */
3704 if (!resolve_elemental_actual (NULL
, c
))
3708 update_current_proc_array_outer_dependency (csym
);
3710 /* Typebound procedure: Assume the worst. */
3711 gfc_current_ns
->proc_name
->attr
.array_outer_dependency
= 1;
3717 /* Compare the shapes of two arrays that have non-NULL shapes. If both
3718 op1->shape and op2->shape are non-NULL return true if their shapes
3719 match. If both op1->shape and op2->shape are non-NULL return false
3720 if their shapes do not match. If either op1->shape or op2->shape is
3721 NULL, return true. */
3724 compare_shapes (gfc_expr
*op1
, gfc_expr
*op2
)
3731 if (op1
->shape
!= NULL
&& op2
->shape
!= NULL
)
3733 for (i
= 0; i
< op1
->rank
; i
++)
3735 if (mpz_cmp (op1
->shape
[i
], op2
->shape
[i
]) != 0)
3737 gfc_error ("Shapes for operands at %L and %L are not conformable",
3738 &op1
->where
, &op2
->where
);
3748 /* Convert a logical operator to the corresponding bitwise intrinsic call.
3749 For example A .AND. B becomes IAND(A, B). */
3751 logical_to_bitwise (gfc_expr
*e
)
3753 gfc_expr
*tmp
, *op1
, *op2
;
3755 gfc_actual_arglist
*args
= NULL
;
3757 gcc_assert (e
->expr_type
== EXPR_OP
);
3759 isym
= GFC_ISYM_NONE
;
3760 op1
= e
->value
.op
.op1
;
3761 op2
= e
->value
.op
.op2
;
3763 switch (e
->value
.op
.op
)
3766 isym
= GFC_ISYM_NOT
;
3769 isym
= GFC_ISYM_IAND
;
3772 isym
= GFC_ISYM_IOR
;
3774 case INTRINSIC_NEQV
:
3775 isym
= GFC_ISYM_IEOR
;
3778 /* "Bitwise eqv" is just the complement of NEQV === IEOR.
3779 Change the old expression to NEQV, which will get replaced by IEOR,
3780 and wrap it in NOT. */
3781 tmp
= gfc_copy_expr (e
);
3782 tmp
->value
.op
.op
= INTRINSIC_NEQV
;
3783 tmp
= logical_to_bitwise (tmp
);
3784 isym
= GFC_ISYM_NOT
;
3789 gfc_internal_error ("logical_to_bitwise(): Bad intrinsic");
3792 /* Inherit the original operation's operands as arguments. */
3793 args
= gfc_get_actual_arglist ();
3797 args
->next
= gfc_get_actual_arglist ();
3798 args
->next
->expr
= op2
;
3801 /* Convert the expression to a function call. */
3802 e
->expr_type
= EXPR_FUNCTION
;
3803 e
->value
.function
.actual
= args
;
3804 e
->value
.function
.isym
= gfc_intrinsic_function_by_id (isym
);
3805 e
->value
.function
.name
= e
->value
.function
.isym
->name
;
3806 e
->value
.function
.esym
= NULL
;
3808 /* Make up a pre-resolved function call symtree if we need to. */
3809 if (!e
->symtree
|| !e
->symtree
->n
.sym
)
3812 gfc_get_ha_sym_tree (e
->value
.function
.isym
->name
, &e
->symtree
);
3813 sym
= e
->symtree
->n
.sym
;
3815 sym
->attr
.flavor
= FL_PROCEDURE
;
3816 sym
->attr
.function
= 1;
3817 sym
->attr
.elemental
= 1;
3819 sym
->attr
.referenced
= 1;
3820 gfc_intrinsic_symbol (sym
);
3821 gfc_commit_symbol (sym
);
3824 args
->name
= e
->value
.function
.isym
->formal
->name
;
3825 if (e
->value
.function
.isym
->formal
->next
)
3826 args
->next
->name
= e
->value
.function
.isym
->formal
->next
->name
;
3831 /* Recursively append candidate UOP to CANDIDATES. Store the number of
3832 candidates in CANDIDATES_LEN. */
3834 lookup_uop_fuzzy_find_candidates (gfc_symtree
*uop
,
3836 size_t &candidates_len
)
3843 /* Not sure how to properly filter here. Use all for a start.
3844 n.uop.op is NULL for empty interface operators (is that legal?) disregard
3845 these as i suppose they don't make terribly sense. */
3847 if (uop
->n
.uop
->op
!= NULL
)
3848 vec_push (candidates
, candidates_len
, uop
->name
);
3852 lookup_uop_fuzzy_find_candidates (p
, candidates
, candidates_len
);
3856 lookup_uop_fuzzy_find_candidates (p
, candidates
, candidates_len
);
3859 /* Lookup user-operator OP fuzzily, taking names in UOP into account. */
3862 lookup_uop_fuzzy (const char *op
, gfc_symtree
*uop
)
3864 char **candidates
= NULL
;
3865 size_t candidates_len
= 0;
3866 lookup_uop_fuzzy_find_candidates (uop
, candidates
, candidates_len
);
3867 return gfc_closest_fuzzy_match (op
, candidates
);
3871 /* Callback finding an impure function as an operand to an .and. or
3872 .or. expression. Remember the last function warned about to
3873 avoid double warnings when recursing. */
3876 impure_function_callback (gfc_expr
**e
, int *walk_subtrees ATTRIBUTE_UNUSED
,
3881 static gfc_expr
*last
= NULL
;
3882 bool *found
= (bool *) data
;
3884 if (f
->expr_type
== EXPR_FUNCTION
)
3887 if (f
!= last
&& !gfc_pure_function (f
, &name
)
3888 && !gfc_implicit_pure_function (f
))
3891 gfc_warning (OPT_Wfunction_elimination
,
3892 "Impure function %qs at %L might not be evaluated",
3895 gfc_warning (OPT_Wfunction_elimination
,
3896 "Impure function at %L might not be evaluated",
3906 /* Resolve an operator expression node. This can involve replacing the
3907 operation with a user defined function call. */
3910 resolve_operator (gfc_expr
*e
)
3912 gfc_expr
*op1
, *op2
;
3914 bool dual_locus_error
;
3917 /* Resolve all subnodes-- give them types. */
3919 switch (e
->value
.op
.op
)
3922 if (!gfc_resolve_expr (e
->value
.op
.op2
))
3928 case INTRINSIC_UPLUS
:
3929 case INTRINSIC_UMINUS
:
3930 case INTRINSIC_PARENTHESES
:
3931 if (!gfc_resolve_expr (e
->value
.op
.op1
))
3936 /* Typecheck the new node. */
3938 op1
= e
->value
.op
.op1
;
3939 op2
= e
->value
.op
.op2
;
3940 dual_locus_error
= false;
3942 if ((op1
&& op1
->expr_type
== EXPR_NULL
)
3943 || (op2
&& op2
->expr_type
== EXPR_NULL
))
3945 sprintf (msg
, _("Invalid context for NULL() pointer at %%L"));
3949 switch (e
->value
.op
.op
)
3951 case INTRINSIC_UPLUS
:
3952 case INTRINSIC_UMINUS
:
3953 if (op1
->ts
.type
== BT_INTEGER
3954 || op1
->ts
.type
== BT_REAL
3955 || op1
->ts
.type
== BT_COMPLEX
)
3961 sprintf (msg
, _("Operand of unary numeric operator %%<%s%%> at %%L is %s"),
3962 gfc_op2string (e
->value
.op
.op
), gfc_typename (&e
->ts
));
3965 case INTRINSIC_PLUS
:
3966 case INTRINSIC_MINUS
:
3967 case INTRINSIC_TIMES
:
3968 case INTRINSIC_DIVIDE
:
3969 case INTRINSIC_POWER
:
3970 if (gfc_numeric_ts (&op1
->ts
) && gfc_numeric_ts (&op2
->ts
))
3972 gfc_type_convert_binary (e
, 1);
3976 if (op1
->ts
.type
== BT_DERIVED
|| op2
->ts
.type
== BT_DERIVED
)
3978 _("Unexpected derived-type entities in binary intrinsic "
3979 "numeric operator %%<%s%%> at %%L"),
3980 gfc_op2string (e
->value
.op
.op
));
3983 _("Operands of binary numeric operator %%<%s%%> at %%L are %s/%s"),
3984 gfc_op2string (e
->value
.op
.op
), gfc_typename (&op1
->ts
),
3985 gfc_typename (&op2
->ts
));
3988 case INTRINSIC_CONCAT
:
3989 if (op1
->ts
.type
== BT_CHARACTER
&& op2
->ts
.type
== BT_CHARACTER
3990 && op1
->ts
.kind
== op2
->ts
.kind
)
3992 e
->ts
.type
= BT_CHARACTER
;
3993 e
->ts
.kind
= op1
->ts
.kind
;
3998 _("Operands of string concatenation operator at %%L are %s/%s"),
3999 gfc_typename (&op1
->ts
), gfc_typename (&op2
->ts
));
4005 case INTRINSIC_NEQV
:
4006 if (op1
->ts
.type
== BT_LOGICAL
&& op2
->ts
.type
== BT_LOGICAL
)
4008 e
->ts
.type
= BT_LOGICAL
;
4009 e
->ts
.kind
= gfc_kind_max (op1
, op2
);
4010 if (op1
->ts
.kind
< e
->ts
.kind
)
4011 gfc_convert_type (op1
, &e
->ts
, 2);
4012 else if (op2
->ts
.kind
< e
->ts
.kind
)
4013 gfc_convert_type (op2
, &e
->ts
, 2);
4015 if (flag_frontend_optimize
&&
4016 (e
->value
.op
.op
== INTRINSIC_AND
|| e
->value
.op
.op
== INTRINSIC_OR
))
4018 /* Warn about short-circuiting
4019 with impure function as second operand. */
4021 gfc_expr_walker (&op2
, impure_function_callback
, &op2_f
);
4026 /* Logical ops on integers become bitwise ops with -fdec. */
4028 && (op1
->ts
.type
== BT_INTEGER
|| op2
->ts
.type
== BT_INTEGER
))
4030 e
->ts
.type
= BT_INTEGER
;
4031 e
->ts
.kind
= gfc_kind_max (op1
, op2
);
4032 if (op1
->ts
.type
!= e
->ts
.type
|| op1
->ts
.kind
!= e
->ts
.kind
)
4033 gfc_convert_type (op1
, &e
->ts
, 1);
4034 if (op2
->ts
.type
!= e
->ts
.type
|| op2
->ts
.kind
!= e
->ts
.kind
)
4035 gfc_convert_type (op2
, &e
->ts
, 1);
4036 e
= logical_to_bitwise (e
);
4040 sprintf (msg
, _("Operands of logical operator %%<%s%%> at %%L are %s/%s"),
4041 gfc_op2string (e
->value
.op
.op
), gfc_typename (&op1
->ts
),
4042 gfc_typename (&op2
->ts
));
4047 /* Logical ops on integers become bitwise ops with -fdec. */
4048 if (flag_dec
&& op1
->ts
.type
== BT_INTEGER
)
4050 e
->ts
.type
= BT_INTEGER
;
4051 e
->ts
.kind
= op1
->ts
.kind
;
4052 e
= logical_to_bitwise (e
);
4056 if (op1
->ts
.type
== BT_LOGICAL
)
4058 e
->ts
.type
= BT_LOGICAL
;
4059 e
->ts
.kind
= op1
->ts
.kind
;
4063 sprintf (msg
, _("Operand of .not. operator at %%L is %s"),
4064 gfc_typename (&op1
->ts
));
4068 case INTRINSIC_GT_OS
:
4070 case INTRINSIC_GE_OS
:
4072 case INTRINSIC_LT_OS
:
4074 case INTRINSIC_LE_OS
:
4075 if (op1
->ts
.type
== BT_COMPLEX
|| op2
->ts
.type
== BT_COMPLEX
)
4077 strcpy (msg
, _("COMPLEX quantities cannot be compared at %L"));
4084 case INTRINSIC_EQ_OS
:
4086 case INTRINSIC_NE_OS
:
4087 if (op1
->ts
.type
== BT_CHARACTER
&& op2
->ts
.type
== BT_CHARACTER
4088 && op1
->ts
.kind
== op2
->ts
.kind
)
4090 e
->ts
.type
= BT_LOGICAL
;
4091 e
->ts
.kind
= gfc_default_logical_kind
;
4095 if (gfc_numeric_ts (&op1
->ts
) && gfc_numeric_ts (&op2
->ts
))
4097 gfc_type_convert_binary (e
, 1);
4099 e
->ts
.type
= BT_LOGICAL
;
4100 e
->ts
.kind
= gfc_default_logical_kind
;
4102 if (warn_compare_reals
)
4104 gfc_intrinsic_op op
= e
->value
.op
.op
;
4106 /* Type conversion has made sure that the types of op1 and op2
4107 agree, so it is only necessary to check the first one. */
4108 if ((op1
->ts
.type
== BT_REAL
|| op1
->ts
.type
== BT_COMPLEX
)
4109 && (op
== INTRINSIC_EQ
|| op
== INTRINSIC_EQ_OS
4110 || op
== INTRINSIC_NE
|| op
== INTRINSIC_NE_OS
))
4114 if (op
== INTRINSIC_EQ
|| op
== INTRINSIC_EQ_OS
)
4115 msg
= "Equality comparison for %s at %L";
4117 msg
= "Inequality comparison for %s at %L";
4119 gfc_warning (OPT_Wcompare_reals
, msg
,
4120 gfc_typename (&op1
->ts
), &op1
->where
);
4127 if (op1
->ts
.type
== BT_LOGICAL
&& op2
->ts
.type
== BT_LOGICAL
)
4129 _("Logicals at %%L must be compared with %s instead of %s"),
4130 (e
->value
.op
.op
== INTRINSIC_EQ
4131 || e
->value
.op
.op
== INTRINSIC_EQ_OS
)
4132 ? ".eqv." : ".neqv.", gfc_op2string (e
->value
.op
.op
));
4135 _("Operands of comparison operator %%<%s%%> at %%L are %s/%s"),
4136 gfc_op2string (e
->value
.op
.op
), gfc_typename (&op1
->ts
),
4137 gfc_typename (&op2
->ts
));
4141 case INTRINSIC_USER
:
4142 if (e
->value
.op
.uop
->op
== NULL
)
4144 const char *name
= e
->value
.op
.uop
->name
;
4145 const char *guessed
;
4146 guessed
= lookup_uop_fuzzy (name
, e
->value
.op
.uop
->ns
->uop_root
);
4148 sprintf (msg
, _("Unknown operator %%<%s%%> at %%L; did you mean '%s'?"),
4151 sprintf (msg
, _("Unknown operator %%<%s%%> at %%L"), name
);
4153 else if (op2
== NULL
)
4154 sprintf (msg
, _("Operand of user operator %%<%s%%> at %%L is %s"),
4155 e
->value
.op
.uop
->name
, gfc_typename (&op1
->ts
));
4158 sprintf (msg
, _("Operands of user operator %%<%s%%> at %%L are %s/%s"),
4159 e
->value
.op
.uop
->name
, gfc_typename (&op1
->ts
),
4160 gfc_typename (&op2
->ts
));
4161 e
->value
.op
.uop
->op
->sym
->attr
.referenced
= 1;
4166 case INTRINSIC_PARENTHESES
:
4168 if (e
->ts
.type
== BT_CHARACTER
)
4169 e
->ts
.u
.cl
= op1
->ts
.u
.cl
;
4173 gfc_internal_error ("resolve_operator(): Bad intrinsic");
4176 /* Deal with arrayness of an operand through an operator. */
4178 switch (e
->value
.op
.op
)
4180 case INTRINSIC_PLUS
:
4181 case INTRINSIC_MINUS
:
4182 case INTRINSIC_TIMES
:
4183 case INTRINSIC_DIVIDE
:
4184 case INTRINSIC_POWER
:
4185 case INTRINSIC_CONCAT
:
4189 case INTRINSIC_NEQV
:
4191 case INTRINSIC_EQ_OS
:
4193 case INTRINSIC_NE_OS
:
4195 case INTRINSIC_GT_OS
:
4197 case INTRINSIC_GE_OS
:
4199 case INTRINSIC_LT_OS
:
4201 case INTRINSIC_LE_OS
:
4203 if (op1
->rank
== 0 && op2
->rank
== 0)
4206 if (op1
->rank
== 0 && op2
->rank
!= 0)
4208 e
->rank
= op2
->rank
;
4210 if (e
->shape
== NULL
)
4211 e
->shape
= gfc_copy_shape (op2
->shape
, op2
->rank
);
4214 if (op1
->rank
!= 0 && op2
->rank
== 0)
4216 e
->rank
= op1
->rank
;
4218 if (e
->shape
== NULL
)
4219 e
->shape
= gfc_copy_shape (op1
->shape
, op1
->rank
);
4222 if (op1
->rank
!= 0 && op2
->rank
!= 0)
4224 if (op1
->rank
== op2
->rank
)
4226 e
->rank
= op1
->rank
;
4227 if (e
->shape
== NULL
)
4229 t
= compare_shapes (op1
, op2
);
4233 e
->shape
= gfc_copy_shape (op1
->shape
, op1
->rank
);
4238 /* Allow higher level expressions to work. */
4241 /* Try user-defined operators, and otherwise throw an error. */
4242 dual_locus_error
= true;
4244 _("Inconsistent ranks for operator at %%L and %%L"));
4251 case INTRINSIC_PARENTHESES
:
4253 case INTRINSIC_UPLUS
:
4254 case INTRINSIC_UMINUS
:
4255 /* Simply copy arrayness attribute */
4256 e
->rank
= op1
->rank
;
4258 if (e
->shape
== NULL
)
4259 e
->shape
= gfc_copy_shape (op1
->shape
, op1
->rank
);
4269 /* Attempt to simplify the expression. */
4272 t
= gfc_simplify_expr (e
, 0);
4273 /* Some calls do not succeed in simplification and return false
4274 even though there is no error; e.g. variable references to
4275 PARAMETER arrays. */
4276 if (!gfc_is_constant_expr (e
))
4284 match m
= gfc_extend_expr (e
);
4287 if (m
== MATCH_ERROR
)
4291 if (dual_locus_error
)
4292 gfc_error (msg
, &op1
->where
, &op2
->where
);
4294 gfc_error (msg
, &e
->where
);
4300 /************** Array resolution subroutines **************/
4303 { CMP_LT
, CMP_EQ
, CMP_GT
, CMP_UNKNOWN
};
4305 /* Compare two integer expressions. */
4307 static compare_result
4308 compare_bound (gfc_expr
*a
, gfc_expr
*b
)
4312 if (a
== NULL
|| a
->expr_type
!= EXPR_CONSTANT
4313 || b
== NULL
|| b
->expr_type
!= EXPR_CONSTANT
)
4316 /* If either of the types isn't INTEGER, we must have
4317 raised an error earlier. */
4319 if (a
->ts
.type
!= BT_INTEGER
|| b
->ts
.type
!= BT_INTEGER
)
4322 i
= mpz_cmp (a
->value
.integer
, b
->value
.integer
);
4332 /* Compare an integer expression with an integer. */
4334 static compare_result
4335 compare_bound_int (gfc_expr
*a
, int b
)
4339 if (a
== NULL
|| a
->expr_type
!= EXPR_CONSTANT
)
4342 if (a
->ts
.type
!= BT_INTEGER
)
4343 gfc_internal_error ("compare_bound_int(): Bad expression");
4345 i
= mpz_cmp_si (a
->value
.integer
, b
);
4355 /* Compare an integer expression with a mpz_t. */
4357 static compare_result
4358 compare_bound_mpz_t (gfc_expr
*a
, mpz_t b
)
4362 if (a
== NULL
|| a
->expr_type
!= EXPR_CONSTANT
)
4365 if (a
->ts
.type
!= BT_INTEGER
)
4366 gfc_internal_error ("compare_bound_int(): Bad expression");
4368 i
= mpz_cmp (a
->value
.integer
, b
);
4378 /* Compute the last value of a sequence given by a triplet.
4379 Return 0 if it wasn't able to compute the last value, or if the
4380 sequence if empty, and 1 otherwise. */
4383 compute_last_value_for_triplet (gfc_expr
*start
, gfc_expr
*end
,
4384 gfc_expr
*stride
, mpz_t last
)
4388 if (start
== NULL
|| start
->expr_type
!= EXPR_CONSTANT
4389 || end
== NULL
|| end
->expr_type
!= EXPR_CONSTANT
4390 || (stride
!= NULL
&& stride
->expr_type
!= EXPR_CONSTANT
))
4393 if (start
->ts
.type
!= BT_INTEGER
|| end
->ts
.type
!= BT_INTEGER
4394 || (stride
!= NULL
&& stride
->ts
.type
!= BT_INTEGER
))
4397 if (stride
== NULL
|| compare_bound_int (stride
, 1) == CMP_EQ
)
4399 if (compare_bound (start
, end
) == CMP_GT
)
4401 mpz_set (last
, end
->value
.integer
);
4405 if (compare_bound_int (stride
, 0) == CMP_GT
)
4407 /* Stride is positive */
4408 if (mpz_cmp (start
->value
.integer
, end
->value
.integer
) > 0)
4413 /* Stride is negative */
4414 if (mpz_cmp (start
->value
.integer
, end
->value
.integer
) < 0)
4419 mpz_sub (rem
, end
->value
.integer
, start
->value
.integer
);
4420 mpz_tdiv_r (rem
, rem
, stride
->value
.integer
);
4421 mpz_sub (last
, end
->value
.integer
, rem
);
4428 /* Compare a single dimension of an array reference to the array
4432 check_dimension (int i
, gfc_array_ref
*ar
, gfc_array_spec
*as
)
4436 if (ar
->dimen_type
[i
] == DIMEN_STAR
)
4438 gcc_assert (ar
->stride
[i
] == NULL
);
4439 /* This implies [*] as [*:] and [*:3] are not possible. */
4440 if (ar
->start
[i
] == NULL
)
4442 gcc_assert (ar
->end
[i
] == NULL
);
4447 /* Given start, end and stride values, calculate the minimum and
4448 maximum referenced indexes. */
4450 switch (ar
->dimen_type
[i
])
4453 case DIMEN_THIS_IMAGE
:
4458 if (compare_bound (ar
->start
[i
], as
->lower
[i
]) == CMP_LT
)
4461 gfc_warning (0, "Array reference at %L is out of bounds "
4462 "(%ld < %ld) in dimension %d", &ar
->c_where
[i
],
4463 mpz_get_si (ar
->start
[i
]->value
.integer
),
4464 mpz_get_si (as
->lower
[i
]->value
.integer
), i
+1);
4466 gfc_warning (0, "Array reference at %L is out of bounds "
4467 "(%ld < %ld) in codimension %d", &ar
->c_where
[i
],
4468 mpz_get_si (ar
->start
[i
]->value
.integer
),
4469 mpz_get_si (as
->lower
[i
]->value
.integer
),
4473 if (compare_bound (ar
->start
[i
], as
->upper
[i
]) == CMP_GT
)
4476 gfc_warning (0, "Array reference at %L is out of bounds "
4477 "(%ld > %ld) in dimension %d", &ar
->c_where
[i
],
4478 mpz_get_si (ar
->start
[i
]->value
.integer
),
4479 mpz_get_si (as
->upper
[i
]->value
.integer
), i
+1);
4481 gfc_warning (0, "Array reference at %L is out of bounds "
4482 "(%ld > %ld) in codimension %d", &ar
->c_where
[i
],
4483 mpz_get_si (ar
->start
[i
]->value
.integer
),
4484 mpz_get_si (as
->upper
[i
]->value
.integer
),
4493 #define AR_START (ar->start[i] ? ar->start[i] : as->lower[i])
4494 #define AR_END (ar->end[i] ? ar->end[i] : as->upper[i])
4496 compare_result comp_start_end
= compare_bound (AR_START
, AR_END
);
4498 /* Check for zero stride, which is not allowed. */
4499 if (compare_bound_int (ar
->stride
[i
], 0) == CMP_EQ
)
4501 gfc_error ("Illegal stride of zero at %L", &ar
->c_where
[i
]);
4505 /* if start == len || (stride > 0 && start < len)
4506 || (stride < 0 && start > len),
4507 then the array section contains at least one element. In this
4508 case, there is an out-of-bounds access if
4509 (start < lower || start > upper). */
4510 if (compare_bound (AR_START
, AR_END
) == CMP_EQ
4511 || ((compare_bound_int (ar
->stride
[i
], 0) == CMP_GT
4512 || ar
->stride
[i
] == NULL
) && comp_start_end
== CMP_LT
)
4513 || (compare_bound_int (ar
->stride
[i
], 0) == CMP_LT
4514 && comp_start_end
== CMP_GT
))
4516 if (compare_bound (AR_START
, as
->lower
[i
]) == CMP_LT
)
4518 gfc_warning (0, "Lower array reference at %L is out of bounds "
4519 "(%ld < %ld) in dimension %d", &ar
->c_where
[i
],
4520 mpz_get_si (AR_START
->value
.integer
),
4521 mpz_get_si (as
->lower
[i
]->value
.integer
), i
+1);
4524 if (compare_bound (AR_START
, as
->upper
[i
]) == CMP_GT
)
4526 gfc_warning (0, "Lower array reference at %L is out of bounds "
4527 "(%ld > %ld) in dimension %d", &ar
->c_where
[i
],
4528 mpz_get_si (AR_START
->value
.integer
),
4529 mpz_get_si (as
->upper
[i
]->value
.integer
), i
+1);
4534 /* If we can compute the highest index of the array section,
4535 then it also has to be between lower and upper. */
4536 mpz_init (last_value
);
4537 if (compute_last_value_for_triplet (AR_START
, AR_END
, ar
->stride
[i
],
4540 if (compare_bound_mpz_t (as
->lower
[i
], last_value
) == CMP_GT
)
4542 gfc_warning (0, "Upper array reference at %L is out of bounds "
4543 "(%ld < %ld) in dimension %d", &ar
->c_where
[i
],
4544 mpz_get_si (last_value
),
4545 mpz_get_si (as
->lower
[i
]->value
.integer
), i
+1);
4546 mpz_clear (last_value
);
4549 if (compare_bound_mpz_t (as
->upper
[i
], last_value
) == CMP_LT
)
4551 gfc_warning (0, "Upper array reference at %L is out of bounds "
4552 "(%ld > %ld) in dimension %d", &ar
->c_where
[i
],
4553 mpz_get_si (last_value
),
4554 mpz_get_si (as
->upper
[i
]->value
.integer
), i
+1);
4555 mpz_clear (last_value
);
4559 mpz_clear (last_value
);
4567 gfc_internal_error ("check_dimension(): Bad array reference");
4574 /* Compare an array reference with an array specification. */
4577 compare_spec_to_ref (gfc_array_ref
*ar
)
4584 /* TODO: Full array sections are only allowed as actual parameters. */
4585 if (as
->type
== AS_ASSUMED_SIZE
4586 && (/*ar->type == AR_FULL
4587 ||*/ (ar
->type
== AR_SECTION
4588 && ar
->dimen_type
[i
] == DIMEN_RANGE
&& ar
->end
[i
] == NULL
)))
4590 gfc_error ("Rightmost upper bound of assumed size array section "
4591 "not specified at %L", &ar
->where
);
4595 if (ar
->type
== AR_FULL
)
4598 if (as
->rank
!= ar
->dimen
)
4600 gfc_error ("Rank mismatch in array reference at %L (%d/%d)",
4601 &ar
->where
, ar
->dimen
, as
->rank
);
4605 /* ar->codimen == 0 is a local array. */
4606 if (as
->corank
!= ar
->codimen
&& ar
->codimen
!= 0)
4608 gfc_error ("Coindex rank mismatch in array reference at %L (%d/%d)",
4609 &ar
->where
, ar
->codimen
, as
->corank
);
4613 for (i
= 0; i
< as
->rank
; i
++)
4614 if (!check_dimension (i
, ar
, as
))
4617 /* Local access has no coarray spec. */
4618 if (ar
->codimen
!= 0)
4619 for (i
= as
->rank
; i
< as
->rank
+ as
->corank
; i
++)
4621 if (ar
->dimen_type
[i
] != DIMEN_ELEMENT
&& !ar
->in_allocate
4622 && ar
->dimen_type
[i
] != DIMEN_THIS_IMAGE
)
4624 gfc_error ("Coindex of codimension %d must be a scalar at %L",
4625 i
+ 1 - as
->rank
, &ar
->where
);
4628 if (!check_dimension (i
, ar
, as
))
4636 /* Resolve one part of an array index. */
4639 gfc_resolve_index_1 (gfc_expr
*index
, int check_scalar
,
4640 int force_index_integer_kind
)
4647 if (!gfc_resolve_expr (index
))
4650 if (check_scalar
&& index
->rank
!= 0)
4652 gfc_error ("Array index at %L must be scalar", &index
->where
);
4656 if (index
->ts
.type
!= BT_INTEGER
&& index
->ts
.type
!= BT_REAL
)
4658 gfc_error ("Array index at %L must be of INTEGER type, found %s",
4659 &index
->where
, gfc_basic_typename (index
->ts
.type
));
4663 if (index
->ts
.type
== BT_REAL
)
4664 if (!gfc_notify_std (GFC_STD_LEGACY
, "REAL array index at %L",
4668 if ((index
->ts
.kind
!= gfc_index_integer_kind
4669 && force_index_integer_kind
)
4670 || index
->ts
.type
!= BT_INTEGER
)
4673 ts
.type
= BT_INTEGER
;
4674 ts
.kind
= gfc_index_integer_kind
;
4676 gfc_convert_type_warn (index
, &ts
, 2, 0);
4682 /* Resolve one part of an array index. */
4685 gfc_resolve_index (gfc_expr
*index
, int check_scalar
)
4687 return gfc_resolve_index_1 (index
, check_scalar
, 1);
4690 /* Resolve a dim argument to an intrinsic function. */
4693 gfc_resolve_dim_arg (gfc_expr
*dim
)
4698 if (!gfc_resolve_expr (dim
))
4703 gfc_error ("Argument dim at %L must be scalar", &dim
->where
);
4708 if (dim
->ts
.type
!= BT_INTEGER
)
4710 gfc_error ("Argument dim at %L must be of INTEGER type", &dim
->where
);
4714 if (dim
->ts
.kind
!= gfc_index_integer_kind
)
4719 ts
.type
= BT_INTEGER
;
4720 ts
.kind
= gfc_index_integer_kind
;
4722 gfc_convert_type_warn (dim
, &ts
, 2, 0);
4728 /* Given an expression that contains array references, update those array
4729 references to point to the right array specifications. While this is
4730 filled in during matching, this information is difficult to save and load
4731 in a module, so we take care of it here.
4733 The idea here is that the original array reference comes from the
4734 base symbol. We traverse the list of reference structures, setting
4735 the stored reference to references. Component references can
4736 provide an additional array specification. */
4739 find_array_spec (gfc_expr
*e
)
4744 bool class_as
= false;
4746 if (e
->symtree
->n
.sym
->ts
.type
== BT_CLASS
)
4748 as
= CLASS_DATA (e
->symtree
->n
.sym
)->as
;
4752 as
= e
->symtree
->n
.sym
->as
;
4754 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
4759 gfc_internal_error ("find_array_spec(): Missing spec");
4766 c
= ref
->u
.c
.component
;
4767 if (c
->attr
.dimension
)
4769 if (as
!= NULL
&& !(class_as
&& as
== c
->as
))
4770 gfc_internal_error ("find_array_spec(): unused as(1)");
4782 gfc_internal_error ("find_array_spec(): unused as(2)");
4786 /* Resolve an array reference. */
4789 resolve_array_ref (gfc_array_ref
*ar
)
4791 int i
, check_scalar
;
4794 for (i
= 0; i
< ar
->dimen
+ ar
->codimen
; i
++)
4796 check_scalar
= ar
->dimen_type
[i
] == DIMEN_RANGE
;
4798 /* Do not force gfc_index_integer_kind for the start. We can
4799 do fine with any integer kind. This avoids temporary arrays
4800 created for indexing with a vector. */
4801 if (!gfc_resolve_index_1 (ar
->start
[i
], check_scalar
, 0))
4803 if (!gfc_resolve_index (ar
->end
[i
], check_scalar
))
4805 if (!gfc_resolve_index (ar
->stride
[i
], check_scalar
))
4810 if (ar
->dimen_type
[i
] == DIMEN_UNKNOWN
)
4814 ar
->dimen_type
[i
] = DIMEN_ELEMENT
;
4818 ar
->dimen_type
[i
] = DIMEN_VECTOR
;
4819 if (e
->expr_type
== EXPR_VARIABLE
4820 && e
->symtree
->n
.sym
->ts
.type
== BT_DERIVED
)
4821 ar
->start
[i
] = gfc_get_parentheses (e
);
4825 gfc_error ("Array index at %L is an array of rank %d",
4826 &ar
->c_where
[i
], e
->rank
);
4830 /* Fill in the upper bound, which may be lower than the
4831 specified one for something like a(2:10:5), which is
4832 identical to a(2:7:5). Only relevant for strides not equal
4833 to one. Don't try a division by zero. */
4834 if (ar
->dimen_type
[i
] == DIMEN_RANGE
4835 && ar
->stride
[i
] != NULL
&& ar
->stride
[i
]->expr_type
== EXPR_CONSTANT
4836 && mpz_cmp_si (ar
->stride
[i
]->value
.integer
, 1L) != 0
4837 && mpz_cmp_si (ar
->stride
[i
]->value
.integer
, 0L) != 0)
4841 if (gfc_ref_dimen_size (ar
, i
, &size
, &end
))
4843 if (ar
->end
[i
] == NULL
)
4846 gfc_get_constant_expr (BT_INTEGER
, gfc_index_integer_kind
,
4848 mpz_set (ar
->end
[i
]->value
.integer
, end
);
4850 else if (ar
->end
[i
]->ts
.type
== BT_INTEGER
4851 && ar
->end
[i
]->expr_type
== EXPR_CONSTANT
)
4853 mpz_set (ar
->end
[i
]->value
.integer
, end
);
4864 if (ar
->type
== AR_FULL
)
4866 if (ar
->as
->rank
== 0)
4867 ar
->type
= AR_ELEMENT
;
4869 /* Make sure array is the same as array(:,:), this way
4870 we don't need to special case all the time. */
4871 ar
->dimen
= ar
->as
->rank
;
4872 for (i
= 0; i
< ar
->dimen
; i
++)
4874 ar
->dimen_type
[i
] = DIMEN_RANGE
;
4876 gcc_assert (ar
->start
[i
] == NULL
);
4877 gcc_assert (ar
->end
[i
] == NULL
);
4878 gcc_assert (ar
->stride
[i
] == NULL
);
4882 /* If the reference type is unknown, figure out what kind it is. */
4884 if (ar
->type
== AR_UNKNOWN
)
4886 ar
->type
= AR_ELEMENT
;
4887 for (i
= 0; i
< ar
->dimen
; i
++)
4888 if (ar
->dimen_type
[i
] == DIMEN_RANGE
4889 || ar
->dimen_type
[i
] == DIMEN_VECTOR
)
4891 ar
->type
= AR_SECTION
;
4896 if (!ar
->as
->cray_pointee
&& !compare_spec_to_ref (ar
))
4899 if (ar
->as
->corank
&& ar
->codimen
== 0)
4902 ar
->codimen
= ar
->as
->corank
;
4903 for (n
= ar
->dimen
; n
< ar
->dimen
+ ar
->codimen
; n
++)
4904 ar
->dimen_type
[n
] = DIMEN_THIS_IMAGE
;
4912 resolve_substring (gfc_ref
*ref
, bool *equal_length
)
4914 int k
= gfc_validate_kind (BT_INTEGER
, gfc_charlen_int_kind
, false);
4916 if (ref
->u
.ss
.start
!= NULL
)
4918 if (!gfc_resolve_expr (ref
->u
.ss
.start
))
4921 if (ref
->u
.ss
.start
->ts
.type
!= BT_INTEGER
)
4923 gfc_error ("Substring start index at %L must be of type INTEGER",
4924 &ref
->u
.ss
.start
->where
);
4928 if (ref
->u
.ss
.start
->rank
!= 0)
4930 gfc_error ("Substring start index at %L must be scalar",
4931 &ref
->u
.ss
.start
->where
);
4935 if (compare_bound_int (ref
->u
.ss
.start
, 1) == CMP_LT
4936 && (compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_EQ
4937 || compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_GT
))
4939 gfc_error ("Substring start index at %L is less than one",
4940 &ref
->u
.ss
.start
->where
);
4945 if (ref
->u
.ss
.end
!= NULL
)
4947 if (!gfc_resolve_expr (ref
->u
.ss
.end
))
4950 if (ref
->u
.ss
.end
->ts
.type
!= BT_INTEGER
)
4952 gfc_error ("Substring end index at %L must be of type INTEGER",
4953 &ref
->u
.ss
.end
->where
);
4957 if (ref
->u
.ss
.end
->rank
!= 0)
4959 gfc_error ("Substring end index at %L must be scalar",
4960 &ref
->u
.ss
.end
->where
);
4964 if (ref
->u
.ss
.length
!= NULL
4965 && compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.length
->length
) == CMP_GT
4966 && (compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_EQ
4967 || compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_GT
))
4969 gfc_error ("Substring end index at %L exceeds the string length",
4970 &ref
->u
.ss
.start
->where
);
4974 if (compare_bound_mpz_t (ref
->u
.ss
.end
,
4975 gfc_integer_kinds
[k
].huge
) == CMP_GT
4976 && (compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_EQ
4977 || compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_GT
))
4979 gfc_error ("Substring end index at %L is too large",
4980 &ref
->u
.ss
.end
->where
);
4983 /* If the substring has the same length as the original
4984 variable, the reference itself can be deleted. */
4986 if (ref
->u
.ss
.length
!= NULL
4987 && compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.length
->length
) == CMP_EQ
4988 && compare_bound_int (ref
->u
.ss
.start
, 1) == CMP_EQ
)
4989 *equal_length
= true;
4996 /* This function supplies missing substring charlens. */
4999 gfc_resolve_substring_charlen (gfc_expr
*e
)
5002 gfc_expr
*start
, *end
;
5003 gfc_typespec
*ts
= NULL
;
5006 for (char_ref
= e
->ref
; char_ref
; char_ref
= char_ref
->next
)
5008 if (char_ref
->type
== REF_SUBSTRING
|| char_ref
->type
== REF_INQUIRY
)
5010 if (char_ref
->type
== REF_COMPONENT
)
5011 ts
= &char_ref
->u
.c
.component
->ts
;
5014 if (!char_ref
|| char_ref
->type
== REF_INQUIRY
)
5017 gcc_assert (char_ref
->next
== NULL
);
5021 if (e
->ts
.u
.cl
->length
)
5022 gfc_free_expr (e
->ts
.u
.cl
->length
);
5023 else if (e
->expr_type
== EXPR_VARIABLE
&& e
->symtree
->n
.sym
->attr
.dummy
)
5027 e
->ts
.type
= BT_CHARACTER
;
5028 e
->ts
.kind
= gfc_default_character_kind
;
5031 e
->ts
.u
.cl
= gfc_new_charlen (gfc_current_ns
, NULL
);
5033 if (char_ref
->u
.ss
.start
)
5034 start
= gfc_copy_expr (char_ref
->u
.ss
.start
);
5036 start
= gfc_get_int_expr (gfc_charlen_int_kind
, NULL
, 1);
5038 if (char_ref
->u
.ss
.end
)
5039 end
= gfc_copy_expr (char_ref
->u
.ss
.end
);
5040 else if (e
->expr_type
== EXPR_VARIABLE
)
5043 ts
= &e
->symtree
->n
.sym
->ts
;
5044 end
= gfc_copy_expr (ts
->u
.cl
->length
);
5051 gfc_free_expr (start
);
5052 gfc_free_expr (end
);
5056 /* Length = (end - start + 1).
5057 Check first whether it has a constant length. */
5058 if (gfc_dep_difference (end
, start
, &diff
))
5060 gfc_expr
*len
= gfc_get_constant_expr (BT_INTEGER
, gfc_charlen_int_kind
,
5063 mpz_add_ui (len
->value
.integer
, diff
, 1);
5065 e
->ts
.u
.cl
->length
= len
;
5066 /* The check for length < 0 is handled below */
5070 e
->ts
.u
.cl
->length
= gfc_subtract (end
, start
);
5071 e
->ts
.u
.cl
->length
= gfc_add (e
->ts
.u
.cl
->length
,
5072 gfc_get_int_expr (gfc_charlen_int_kind
,
5076 /* F2008, 6.4.1: Both the starting point and the ending point shall
5077 be within the range 1, 2, ..., n unless the starting point exceeds
5078 the ending point, in which case the substring has length zero. */
5080 if (mpz_cmp_si (e
->ts
.u
.cl
->length
->value
.integer
, 0) < 0)
5081 mpz_set_si (e
->ts
.u
.cl
->length
->value
.integer
, 0);
5083 e
->ts
.u
.cl
->length
->ts
.type
= BT_INTEGER
;
5084 e
->ts
.u
.cl
->length
->ts
.kind
= gfc_charlen_int_kind
;
5086 /* Make sure that the length is simplified. */
5087 gfc_simplify_expr (e
->ts
.u
.cl
->length
, 1);
5088 gfc_resolve_expr (e
->ts
.u
.cl
->length
);
5092 /* Resolve subtype references. */
5095 resolve_ref (gfc_expr
*expr
)
5097 int current_part_dimension
, n_components
, seen_part_dimension
;
5098 gfc_ref
*ref
, **prev
;
5101 for (ref
= expr
->ref
; ref
; ref
= ref
->next
)
5102 if (ref
->type
== REF_ARRAY
&& ref
->u
.ar
.as
== NULL
)
5104 find_array_spec (expr
);
5108 for (prev
= &expr
->ref
; *prev
!= NULL
;
5109 prev
= *prev
== NULL
? prev
: &(*prev
)->next
)
5110 switch ((*prev
)->type
)
5113 if (!resolve_array_ref (&(*prev
)->u
.ar
))
5122 equal_length
= false;
5123 if (!resolve_substring (*prev
, &equal_length
))
5126 if (expr
->expr_type
!= EXPR_SUBSTRING
&& equal_length
)
5128 /* Remove the reference and move the charlen, if any. */
5132 expr
->ts
.u
.cl
= ref
->u
.ss
.length
;
5133 ref
->u
.ss
.length
= NULL
;
5134 gfc_free_ref_list (ref
);
5139 /* Check constraints on part references. */
5141 current_part_dimension
= 0;
5142 seen_part_dimension
= 0;
5145 for (ref
= expr
->ref
; ref
; ref
= ref
->next
)
5150 switch (ref
->u
.ar
.type
)
5153 /* Coarray scalar. */
5154 if (ref
->u
.ar
.as
->rank
== 0)
5156 current_part_dimension
= 0;
5161 current_part_dimension
= 1;
5165 current_part_dimension
= 0;
5169 gfc_internal_error ("resolve_ref(): Bad array reference");
5175 if (current_part_dimension
|| seen_part_dimension
)
5178 if (ref
->u
.c
.component
->attr
.pointer
5179 || ref
->u
.c
.component
->attr
.proc_pointer
5180 || (ref
->u
.c
.component
->ts
.type
== BT_CLASS
5181 && CLASS_DATA (ref
->u
.c
.component
)->attr
.pointer
))
5183 gfc_error ("Component to the right of a part reference "
5184 "with nonzero rank must not have the POINTER "
5185 "attribute at %L", &expr
->where
);
5188 else if (ref
->u
.c
.component
->attr
.allocatable
5189 || (ref
->u
.c
.component
->ts
.type
== BT_CLASS
5190 && CLASS_DATA (ref
->u
.c
.component
)->attr
.allocatable
))
5193 gfc_error ("Component to the right of a part reference "
5194 "with nonzero rank must not have the ALLOCATABLE "
5195 "attribute at %L", &expr
->where
);
5208 if (((ref
->type
== REF_COMPONENT
&& n_components
> 1)
5209 || ref
->next
== NULL
)
5210 && current_part_dimension
5211 && seen_part_dimension
)
5213 gfc_error ("Two or more part references with nonzero rank must "
5214 "not be specified at %L", &expr
->where
);
5218 if (ref
->type
== REF_COMPONENT
)
5220 if (current_part_dimension
)
5221 seen_part_dimension
= 1;
5223 /* reset to make sure */
5224 current_part_dimension
= 0;
5232 /* Given an expression, determine its shape. This is easier than it sounds.
5233 Leaves the shape array NULL if it is not possible to determine the shape. */
5236 expression_shape (gfc_expr
*e
)
5238 mpz_t array
[GFC_MAX_DIMENSIONS
];
5241 if (e
->rank
<= 0 || e
->shape
!= NULL
)
5244 for (i
= 0; i
< e
->rank
; i
++)
5245 if (!gfc_array_dimen_size (e
, i
, &array
[i
]))
5248 e
->shape
= gfc_get_shape (e
->rank
);
5250 memcpy (e
->shape
, array
, e
->rank
* sizeof (mpz_t
));
5255 for (i
--; i
>= 0; i
--)
5256 mpz_clear (array
[i
]);
5260 /* Given a variable expression node, compute the rank of the expression by
5261 examining the base symbol and any reference structures it may have. */
5264 expression_rank (gfc_expr
*e
)
5269 /* Just to make sure, because EXPR_COMPCALL's also have an e->ref and that
5270 could lead to serious confusion... */
5271 gcc_assert (e
->expr_type
!= EXPR_COMPCALL
);
5275 if (e
->expr_type
== EXPR_ARRAY
)
5277 /* Constructors can have a rank different from one via RESHAPE(). */
5279 if (e
->symtree
== NULL
)
5285 e
->rank
= (e
->symtree
->n
.sym
->as
== NULL
)
5286 ? 0 : e
->symtree
->n
.sym
->as
->rank
;
5292 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
5294 if (ref
->type
== REF_COMPONENT
&& ref
->u
.c
.component
->attr
.proc_pointer
5295 && ref
->u
.c
.component
->attr
.function
&& !ref
->next
)
5296 rank
= ref
->u
.c
.component
->as
? ref
->u
.c
.component
->as
->rank
: 0;
5298 if (ref
->type
!= REF_ARRAY
)
5301 if (ref
->u
.ar
.type
== AR_FULL
)
5303 rank
= ref
->u
.ar
.as
->rank
;
5307 if (ref
->u
.ar
.type
== AR_SECTION
)
5309 /* Figure out the rank of the section. */
5311 gfc_internal_error ("expression_rank(): Two array specs");
5313 for (i
= 0; i
< ref
->u
.ar
.dimen
; i
++)
5314 if (ref
->u
.ar
.dimen_type
[i
] == DIMEN_RANGE
5315 || ref
->u
.ar
.dimen_type
[i
] == DIMEN_VECTOR
)
5325 expression_shape (e
);
5330 add_caf_get_intrinsic (gfc_expr
*e
)
5332 gfc_expr
*wrapper
, *tmp_expr
;
5336 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
5337 if (ref
->type
== REF_ARRAY
&& ref
->u
.ar
.codimen
> 0)
5342 for (n
= ref
->u
.ar
.dimen
; n
< ref
->u
.ar
.dimen
+ ref
->u
.ar
.codimen
; n
++)
5343 if (ref
->u
.ar
.dimen_type
[n
] != DIMEN_ELEMENT
)
5346 tmp_expr
= XCNEW (gfc_expr
);
5348 wrapper
= gfc_build_intrinsic_call (gfc_current_ns
, GFC_ISYM_CAF_GET
,
5349 "caf_get", tmp_expr
->where
, 1, tmp_expr
);
5350 wrapper
->ts
= e
->ts
;
5351 wrapper
->rank
= e
->rank
;
5353 wrapper
->shape
= gfc_copy_shape (e
->shape
, e
->rank
);
5360 remove_caf_get_intrinsic (gfc_expr
*e
)
5362 gcc_assert (e
->expr_type
== EXPR_FUNCTION
&& e
->value
.function
.isym
5363 && e
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
);
5364 gfc_expr
*e2
= e
->value
.function
.actual
->expr
;
5365 e
->value
.function
.actual
->expr
= NULL
;
5366 gfc_free_actual_arglist (e
->value
.function
.actual
);
5367 gfc_free_shape (&e
->shape
, e
->rank
);
5373 /* Resolve a variable expression. */
5376 resolve_variable (gfc_expr
*e
)
5383 if (e
->symtree
== NULL
)
5385 sym
= e
->symtree
->n
.sym
;
5387 /* Use same check as for TYPE(*) below; this check has to be before TYPE(*)
5388 as ts.type is set to BT_ASSUMED in resolve_symbol. */
5389 if (sym
->attr
.ext_attr
& (1 << EXT_ATTR_NO_ARG_CHECK
))
5391 if (!actual_arg
|| inquiry_argument
)
5393 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute may only "
5394 "be used as actual argument", sym
->name
, &e
->where
);
5398 /* TS 29113, 407b. */
5399 else if (e
->ts
.type
== BT_ASSUMED
)
5403 gfc_error ("Assumed-type variable %s at %L may only be used "
5404 "as actual argument", sym
->name
, &e
->where
);
5407 else if (inquiry_argument
&& !first_actual_arg
)
5409 /* FIXME: It doesn't work reliably as inquiry_argument is not set
5410 for all inquiry functions in resolve_function; the reason is
5411 that the function-name resolution happens too late in that
5413 gfc_error ("Assumed-type variable %s at %L as actual argument to "
5414 "an inquiry function shall be the first argument",
5415 sym
->name
, &e
->where
);
5419 /* TS 29113, C535b. */
5420 else if ((sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
5421 && CLASS_DATA (sym
)->as
5422 && CLASS_DATA (sym
)->as
->type
== AS_ASSUMED_RANK
)
5423 || (sym
->ts
.type
!= BT_CLASS
&& sym
->as
5424 && sym
->as
->type
== AS_ASSUMED_RANK
))
5428 gfc_error ("Assumed-rank variable %s at %L may only be used as "
5429 "actual argument", sym
->name
, &e
->where
);
5432 else if (inquiry_argument
&& !first_actual_arg
)
5434 /* FIXME: It doesn't work reliably as inquiry_argument is not set
5435 for all inquiry functions in resolve_function; the reason is
5436 that the function-name resolution happens too late in that
5438 gfc_error ("Assumed-rank variable %s at %L as actual argument "
5439 "to an inquiry function shall be the first argument",
5440 sym
->name
, &e
->where
);
5445 if ((sym
->attr
.ext_attr
& (1 << EXT_ATTR_NO_ARG_CHECK
)) && e
->ref
5446 && !(e
->ref
->type
== REF_ARRAY
&& e
->ref
->u
.ar
.type
== AR_FULL
5447 && e
->ref
->next
== NULL
))
5449 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute shall not have "
5450 "a subobject reference", sym
->name
, &e
->ref
->u
.ar
.where
);
5453 /* TS 29113, 407b. */
5454 else if (e
->ts
.type
== BT_ASSUMED
&& e
->ref
5455 && !(e
->ref
->type
== REF_ARRAY
&& e
->ref
->u
.ar
.type
== AR_FULL
5456 && e
->ref
->next
== NULL
))
5458 gfc_error ("Assumed-type variable %s at %L shall not have a subobject "
5459 "reference", sym
->name
, &e
->ref
->u
.ar
.where
);
5463 /* TS 29113, C535b. */
5464 if (((sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
5465 && CLASS_DATA (sym
)->as
5466 && CLASS_DATA (sym
)->as
->type
== AS_ASSUMED_RANK
)
5467 || (sym
->ts
.type
!= BT_CLASS
&& sym
->as
5468 && sym
->as
->type
== AS_ASSUMED_RANK
))
5470 && !(e
->ref
->type
== REF_ARRAY
&& e
->ref
->u
.ar
.type
== AR_FULL
5471 && e
->ref
->next
== NULL
))
5473 gfc_error ("Assumed-rank variable %s at %L shall not have a subobject "
5474 "reference", sym
->name
, &e
->ref
->u
.ar
.where
);
5478 /* For variables that are used in an associate (target => object) where
5479 the object's basetype is array valued while the target is scalar,
5480 the ts' type of the component refs is still array valued, which
5481 can't be translated that way. */
5482 if (sym
->assoc
&& e
->rank
== 0 && e
->ref
&& sym
->ts
.type
== BT_CLASS
5483 && sym
->assoc
->target
&& sym
->assoc
->target
->ts
.type
== BT_CLASS
5484 && CLASS_DATA (sym
->assoc
->target
)->as
)
5486 gfc_ref
*ref
= e
->ref
;
5492 ref
->u
.c
.sym
= sym
->ts
.u
.derived
;
5493 /* Stop the loop. */
5503 /* If this is an associate-name, it may be parsed with an array reference
5504 in error even though the target is scalar. Fail directly in this case.
5505 TODO Understand why class scalar expressions must be excluded. */
5506 if (sym
->assoc
&& !(sym
->ts
.type
== BT_CLASS
&& e
->rank
== 0))
5508 if (sym
->ts
.type
== BT_CLASS
)
5509 gfc_fix_class_refs (e
);
5510 if (!sym
->attr
.dimension
&& e
->ref
&& e
->ref
->type
== REF_ARRAY
)
5512 else if (sym
->attr
.dimension
&& (!e
->ref
|| e
->ref
->type
!= REF_ARRAY
))
5514 /* This can happen because the parser did not detect that the
5515 associate name is an array and the expression had no array
5517 gfc_ref
*ref
= gfc_get_ref ();
5518 ref
->type
= REF_ARRAY
;
5519 ref
->u
.ar
= *gfc_get_array_ref();
5520 ref
->u
.ar
.type
= AR_FULL
;
5523 ref
->u
.ar
.as
= sym
->as
;
5524 ref
->u
.ar
.dimen
= sym
->as
->rank
;
5532 if (sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
->attr
.generic
)
5533 sym
->ts
.u
.derived
= gfc_find_dt_in_generic (sym
->ts
.u
.derived
);
5535 /* On the other hand, the parser may not have known this is an array;
5536 in this case, we have to add a FULL reference. */
5537 if (sym
->assoc
&& sym
->attr
.dimension
&& !e
->ref
)
5539 e
->ref
= gfc_get_ref ();
5540 e
->ref
->type
= REF_ARRAY
;
5541 e
->ref
->u
.ar
.type
= AR_FULL
;
5542 e
->ref
->u
.ar
.dimen
= 0;
5545 /* Like above, but for class types, where the checking whether an array
5546 ref is present is more complicated. Furthermore make sure not to add
5547 the full array ref to _vptr or _len refs. */
5548 if (sym
->assoc
&& sym
->ts
.type
== BT_CLASS
5549 && CLASS_DATA (sym
)->attr
.dimension
5550 && (e
->ts
.type
!= BT_DERIVED
|| !e
->ts
.u
.derived
->attr
.vtype
))
5552 gfc_ref
*ref
, *newref
;
5554 newref
= gfc_get_ref ();
5555 newref
->type
= REF_ARRAY
;
5556 newref
->u
.ar
.type
= AR_FULL
;
5557 newref
->u
.ar
.dimen
= 0;
5558 /* Because this is an associate var and the first ref either is a ref to
5559 the _data component or not, no traversal of the ref chain is
5560 needed. The array ref needs to be inserted after the _data ref,
5561 or when that is not present, which may happend for polymorphic
5562 types, then at the first position. */
5566 else if (ref
->type
== REF_COMPONENT
5567 && strcmp ("_data", ref
->u
.c
.component
->name
) == 0)
5569 if (!ref
->next
|| ref
->next
->type
!= REF_ARRAY
)
5571 newref
->next
= ref
->next
;
5575 /* Array ref present already. */
5576 gfc_free_ref_list (newref
);
5578 else if (ref
->type
== REF_ARRAY
)
5579 /* Array ref present already. */
5580 gfc_free_ref_list (newref
);
5588 if (e
->ref
&& !resolve_ref (e
))
5591 if (sym
->attr
.flavor
== FL_PROCEDURE
5592 && (!sym
->attr
.function
5593 || (sym
->attr
.function
&& sym
->result
5594 && sym
->result
->attr
.proc_pointer
5595 && !sym
->result
->attr
.function
)))
5597 e
->ts
.type
= BT_PROCEDURE
;
5598 goto resolve_procedure
;
5601 if (sym
->ts
.type
!= BT_UNKNOWN
)
5602 gfc_variable_attr (e
, &e
->ts
);
5603 else if (sym
->attr
.flavor
== FL_PROCEDURE
5604 && sym
->attr
.function
&& sym
->result
5605 && sym
->result
->ts
.type
!= BT_UNKNOWN
5606 && sym
->result
->attr
.proc_pointer
)
5607 e
->ts
= sym
->result
->ts
;
5610 /* Must be a simple variable reference. */
5611 if (!gfc_set_default_type (sym
, 1, sym
->ns
))
5616 if (check_assumed_size_reference (sym
, e
))
5619 /* Deal with forward references to entries during gfc_resolve_code, to
5620 satisfy, at least partially, 12.5.2.5. */
5621 if (gfc_current_ns
->entries
5622 && current_entry_id
== sym
->entry_id
5625 && cs_base
->current
->op
!= EXEC_ENTRY
)
5627 gfc_entry_list
*entry
;
5628 gfc_formal_arglist
*formal
;
5630 bool seen
, saved_specification_expr
;
5632 /* If the symbol is a dummy... */
5633 if (sym
->attr
.dummy
&& sym
->ns
== gfc_current_ns
)
5635 entry
= gfc_current_ns
->entries
;
5638 /* ...test if the symbol is a parameter of previous entries. */
5639 for (; entry
&& entry
->id
<= current_entry_id
; entry
= entry
->next
)
5640 for (formal
= entry
->sym
->formal
; formal
; formal
= formal
->next
)
5642 if (formal
->sym
&& sym
->name
== formal
->sym
->name
)
5649 /* If it has not been seen as a dummy, this is an error. */
5652 if (specification_expr
)
5653 gfc_error ("Variable %qs, used in a specification expression"
5654 ", is referenced at %L before the ENTRY statement "
5655 "in which it is a parameter",
5656 sym
->name
, &cs_base
->current
->loc
);
5658 gfc_error ("Variable %qs is used at %L before the ENTRY "
5659 "statement in which it is a parameter",
5660 sym
->name
, &cs_base
->current
->loc
);
5665 /* Now do the same check on the specification expressions. */
5666 saved_specification_expr
= specification_expr
;
5667 specification_expr
= true;
5668 if (sym
->ts
.type
== BT_CHARACTER
5669 && !gfc_resolve_expr (sym
->ts
.u
.cl
->length
))
5673 for (n
= 0; n
< sym
->as
->rank
; n
++)
5675 if (!gfc_resolve_expr (sym
->as
->lower
[n
]))
5677 if (!gfc_resolve_expr (sym
->as
->upper
[n
]))
5680 specification_expr
= saved_specification_expr
;
5683 /* Update the symbol's entry level. */
5684 sym
->entry_id
= current_entry_id
+ 1;
5687 /* If a symbol has been host_associated mark it. This is used latter,
5688 to identify if aliasing is possible via host association. */
5689 if (sym
->attr
.flavor
== FL_VARIABLE
5690 && gfc_current_ns
->parent
5691 && (gfc_current_ns
->parent
== sym
->ns
5692 || (gfc_current_ns
->parent
->parent
5693 && gfc_current_ns
->parent
->parent
== sym
->ns
)))
5694 sym
->attr
.host_assoc
= 1;
5696 if (gfc_current_ns
->proc_name
5697 && sym
->attr
.dimension
5698 && (sym
->ns
!= gfc_current_ns
5699 || sym
->attr
.use_assoc
5700 || sym
->attr
.in_common
))
5701 gfc_current_ns
->proc_name
->attr
.array_outer_dependency
= 1;
5704 if (t
&& !resolve_procedure_expression (e
))
5707 /* F2008, C617 and C1229. */
5708 if (!inquiry_argument
&& (e
->ts
.type
== BT_CLASS
|| e
->ts
.type
== BT_DERIVED
)
5709 && gfc_is_coindexed (e
))
5711 gfc_ref
*ref
, *ref2
= NULL
;
5713 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
5715 if (ref
->type
== REF_COMPONENT
)
5717 if (ref
->type
== REF_ARRAY
&& ref
->u
.ar
.codimen
> 0)
5721 for ( ; ref
; ref
= ref
->next
)
5722 if (ref
->type
== REF_COMPONENT
)
5725 /* Expression itself is not coindexed object. */
5726 if (ref
&& e
->ts
.type
== BT_CLASS
)
5728 gfc_error ("Polymorphic subobject of coindexed object at %L",
5733 /* Expression itself is coindexed object. */
5737 c
= ref2
? ref2
->u
.c
.component
: e
->symtree
->n
.sym
->components
;
5738 for ( ; c
; c
= c
->next
)
5739 if (c
->attr
.allocatable
&& c
->ts
.type
== BT_CLASS
)
5741 gfc_error ("Coindexed object with polymorphic allocatable "
5742 "subcomponent at %L", &e
->where
);
5750 expression_rank (e
);
5752 if (t
&& flag_coarray
== GFC_FCOARRAY_LIB
&& gfc_is_coindexed (e
))
5753 add_caf_get_intrinsic (e
);
5755 /* Simplify cases where access to a parameter array results in a
5756 single constant. Suppress errors since those will have been
5757 issued before, as warnings. */
5758 if (e
->rank
== 0 && sym
->as
&& sym
->attr
.flavor
== FL_PARAMETER
)
5760 gfc_push_suppress_errors ();
5761 gfc_simplify_expr (e
, 1);
5762 gfc_pop_suppress_errors ();
5769 /* Checks to see that the correct symbol has been host associated.
5770 The only situation where this arises is that in which a twice
5771 contained function is parsed after the host association is made.
5772 Therefore, on detecting this, change the symbol in the expression
5773 and convert the array reference into an actual arglist if the old
5774 symbol is a variable. */
5776 check_host_association (gfc_expr
*e
)
5778 gfc_symbol
*sym
, *old_sym
;
5782 gfc_actual_arglist
*arg
, *tail
= NULL
;
5783 bool retval
= e
->expr_type
== EXPR_FUNCTION
;
5785 /* If the expression is the result of substitution in
5786 interface.c(gfc_extend_expr) because there is no way in
5787 which the host association can be wrong. */
5788 if (e
->symtree
== NULL
5789 || e
->symtree
->n
.sym
== NULL
5790 || e
->user_operator
)
5793 old_sym
= e
->symtree
->n
.sym
;
5795 if (gfc_current_ns
->parent
5796 && old_sym
->ns
!= gfc_current_ns
)
5798 /* Use the 'USE' name so that renamed module symbols are
5799 correctly handled. */
5800 gfc_find_symbol (e
->symtree
->name
, gfc_current_ns
, 1, &sym
);
5802 if (sym
&& old_sym
!= sym
5803 && sym
->ts
.type
== old_sym
->ts
.type
5804 && sym
->attr
.flavor
== FL_PROCEDURE
5805 && sym
->attr
.contained
)
5807 /* Clear the shape, since it might not be valid. */
5808 gfc_free_shape (&e
->shape
, e
->rank
);
5810 /* Give the expression the right symtree! */
5811 gfc_find_sym_tree (e
->symtree
->name
, NULL
, 1, &st
);
5812 gcc_assert (st
!= NULL
);
5814 if (old_sym
->attr
.flavor
== FL_PROCEDURE
5815 || e
->expr_type
== EXPR_FUNCTION
)
5817 /* Original was function so point to the new symbol, since
5818 the actual argument list is already attached to the
5820 e
->value
.function
.esym
= NULL
;
5825 /* Original was variable so convert array references into
5826 an actual arglist. This does not need any checking now
5827 since resolve_function will take care of it. */
5828 e
->value
.function
.actual
= NULL
;
5829 e
->expr_type
= EXPR_FUNCTION
;
5832 /* Ambiguity will not arise if the array reference is not
5833 the last reference. */
5834 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
5835 if (ref
->type
== REF_ARRAY
&& ref
->next
== NULL
)
5838 gcc_assert (ref
->type
== REF_ARRAY
);
5840 /* Grab the start expressions from the array ref and
5841 copy them into actual arguments. */
5842 for (n
= 0; n
< ref
->u
.ar
.dimen
; n
++)
5844 arg
= gfc_get_actual_arglist ();
5845 arg
->expr
= gfc_copy_expr (ref
->u
.ar
.start
[n
]);
5846 if (e
->value
.function
.actual
== NULL
)
5847 tail
= e
->value
.function
.actual
= arg
;
5855 /* Dump the reference list and set the rank. */
5856 gfc_free_ref_list (e
->ref
);
5858 e
->rank
= sym
->as
? sym
->as
->rank
: 0;
5861 gfc_resolve_expr (e
);
5865 /* This might have changed! */
5866 return e
->expr_type
== EXPR_FUNCTION
;
5871 gfc_resolve_character_operator (gfc_expr
*e
)
5873 gfc_expr
*op1
= e
->value
.op
.op1
;
5874 gfc_expr
*op2
= e
->value
.op
.op2
;
5875 gfc_expr
*e1
= NULL
;
5876 gfc_expr
*e2
= NULL
;
5878 gcc_assert (e
->value
.op
.op
== INTRINSIC_CONCAT
);
5880 if (op1
->ts
.u
.cl
&& op1
->ts
.u
.cl
->length
)
5881 e1
= gfc_copy_expr (op1
->ts
.u
.cl
->length
);
5882 else if (op1
->expr_type
== EXPR_CONSTANT
)
5883 e1
= gfc_get_int_expr (gfc_charlen_int_kind
, NULL
,
5884 op1
->value
.character
.length
);
5886 if (op2
->ts
.u
.cl
&& op2
->ts
.u
.cl
->length
)
5887 e2
= gfc_copy_expr (op2
->ts
.u
.cl
->length
);
5888 else if (op2
->expr_type
== EXPR_CONSTANT
)
5889 e2
= gfc_get_int_expr (gfc_charlen_int_kind
, NULL
,
5890 op2
->value
.character
.length
);
5892 e
->ts
.u
.cl
= gfc_new_charlen (gfc_current_ns
, NULL
);
5902 e
->ts
.u
.cl
->length
= gfc_add (e1
, e2
);
5903 e
->ts
.u
.cl
->length
->ts
.type
= BT_INTEGER
;
5904 e
->ts
.u
.cl
->length
->ts
.kind
= gfc_charlen_int_kind
;
5905 gfc_simplify_expr (e
->ts
.u
.cl
->length
, 0);
5906 gfc_resolve_expr (e
->ts
.u
.cl
->length
);
5912 /* Ensure that an character expression has a charlen and, if possible, a
5913 length expression. */
5916 fixup_charlen (gfc_expr
*e
)
5918 /* The cases fall through so that changes in expression type and the need
5919 for multiple fixes are picked up. In all circumstances, a charlen should
5920 be available for the middle end to hang a backend_decl on. */
5921 switch (e
->expr_type
)
5924 gfc_resolve_character_operator (e
);
5928 if (e
->expr_type
== EXPR_ARRAY
)
5929 gfc_resolve_character_array_constructor (e
);
5932 case EXPR_SUBSTRING
:
5933 if (!e
->ts
.u
.cl
&& e
->ref
)
5934 gfc_resolve_substring_charlen (e
);
5939 e
->ts
.u
.cl
= gfc_new_charlen (gfc_current_ns
, NULL
);
5946 /* Update an actual argument to include the passed-object for type-bound
5947 procedures at the right position. */
5949 static gfc_actual_arglist
*
5950 update_arglist_pass (gfc_actual_arglist
* lst
, gfc_expr
* po
, unsigned argpos
,
5953 gcc_assert (argpos
> 0);
5957 gfc_actual_arglist
* result
;
5959 result
= gfc_get_actual_arglist ();
5963 result
->name
= name
;
5969 lst
->next
= update_arglist_pass (lst
->next
, po
, argpos
- 1, name
);
5971 lst
= update_arglist_pass (NULL
, po
, argpos
- 1, name
);
5976 /* Extract the passed-object from an EXPR_COMPCALL (a copy of it). */
5979 extract_compcall_passed_object (gfc_expr
* e
)
5983 if (e
->expr_type
== EXPR_UNKNOWN
)
5985 gfc_error ("Error in typebound call at %L",
5990 gcc_assert (e
->expr_type
== EXPR_COMPCALL
);
5992 if (e
->value
.compcall
.base_object
)
5993 po
= gfc_copy_expr (e
->value
.compcall
.base_object
);
5996 po
= gfc_get_expr ();
5997 po
->expr_type
= EXPR_VARIABLE
;
5998 po
->symtree
= e
->symtree
;
5999 po
->ref
= gfc_copy_ref (e
->ref
);
6000 po
->where
= e
->where
;
6003 if (!gfc_resolve_expr (po
))
6010 /* Update the arglist of an EXPR_COMPCALL expression to include the
6014 update_compcall_arglist (gfc_expr
* e
)
6017 gfc_typebound_proc
* tbp
;
6019 tbp
= e
->value
.compcall
.tbp
;
6024 po
= extract_compcall_passed_object (e
);
6028 if (tbp
->nopass
|| e
->value
.compcall
.ignore_pass
)
6034 if (tbp
->pass_arg_num
<= 0)
6037 e
->value
.compcall
.actual
= update_arglist_pass (e
->value
.compcall
.actual
, po
,
6045 /* Extract the passed object from a PPC call (a copy of it). */
6048 extract_ppc_passed_object (gfc_expr
*e
)
6053 po
= gfc_get_expr ();
6054 po
->expr_type
= EXPR_VARIABLE
;
6055 po
->symtree
= e
->symtree
;
6056 po
->ref
= gfc_copy_ref (e
->ref
);
6057 po
->where
= e
->where
;
6059 /* Remove PPC reference. */
6061 while ((*ref
)->next
)
6062 ref
= &(*ref
)->next
;
6063 gfc_free_ref_list (*ref
);
6066 if (!gfc_resolve_expr (po
))
6073 /* Update the actual arglist of a procedure pointer component to include the
6077 update_ppc_arglist (gfc_expr
* e
)
6081 gfc_typebound_proc
* tb
;
6083 ppc
= gfc_get_proc_ptr_comp (e
);
6091 else if (tb
->nopass
)
6094 po
= extract_ppc_passed_object (e
);
6101 gfc_error ("Passed-object at %L must be scalar", &e
->where
);
6106 if (po
->ts
.type
== BT_DERIVED
&& po
->ts
.u
.derived
->attr
.abstract
)
6108 gfc_error ("Base object for procedure-pointer component call at %L is of"
6109 " ABSTRACT type %qs", &e
->where
, po
->ts
.u
.derived
->name
);
6113 gcc_assert (tb
->pass_arg_num
> 0);
6114 e
->value
.compcall
.actual
= update_arglist_pass (e
->value
.compcall
.actual
, po
,
6122 /* Check that the object a TBP is called on is valid, i.e. it must not be
6123 of ABSTRACT type (as in subobject%abstract_parent%tbp()). */
6126 check_typebound_baseobject (gfc_expr
* e
)
6129 bool return_value
= false;
6131 base
= extract_compcall_passed_object (e
);
6135 if (base
->ts
.type
!= BT_DERIVED
&& base
->ts
.type
!= BT_CLASS
)
6137 gfc_error ("Error in typebound call at %L", &e
->where
);
6141 if (base
->ts
.type
== BT_CLASS
&& !gfc_expr_attr (base
).class_ok
)
6145 if (base
->ts
.type
== BT_DERIVED
&& base
->ts
.u
.derived
->attr
.abstract
)
6147 gfc_error ("Base object for type-bound procedure call at %L is of"
6148 " ABSTRACT type %qs", &e
->where
, base
->ts
.u
.derived
->name
);
6152 /* F08:C1230. If the procedure called is NOPASS,
6153 the base object must be scalar. */
6154 if (e
->value
.compcall
.tbp
->nopass
&& base
->rank
!= 0)
6156 gfc_error ("Base object for NOPASS type-bound procedure call at %L must"
6157 " be scalar", &e
->where
);
6161 return_value
= true;
6164 gfc_free_expr (base
);
6165 return return_value
;
6169 /* Resolve a call to a type-bound procedure, either function or subroutine,
6170 statically from the data in an EXPR_COMPCALL expression. The adapted
6171 arglist and the target-procedure symtree are returned. */
6174 resolve_typebound_static (gfc_expr
* e
, gfc_symtree
** target
,
6175 gfc_actual_arglist
** actual
)
6177 gcc_assert (e
->expr_type
== EXPR_COMPCALL
);
6178 gcc_assert (!e
->value
.compcall
.tbp
->is_generic
);
6180 /* Update the actual arglist for PASS. */
6181 if (!update_compcall_arglist (e
))
6184 *actual
= e
->value
.compcall
.actual
;
6185 *target
= e
->value
.compcall
.tbp
->u
.specific
;
6187 gfc_free_ref_list (e
->ref
);
6189 e
->value
.compcall
.actual
= NULL
;
6191 /* If we find a deferred typebound procedure, check for derived types
6192 that an overriding typebound procedure has not been missed. */
6193 if (e
->value
.compcall
.name
6194 && !e
->value
.compcall
.tbp
->non_overridable
6195 && e
->value
.compcall
.base_object
6196 && e
->value
.compcall
.base_object
->ts
.type
== BT_DERIVED
)
6199 gfc_symbol
*derived
;
6201 /* Use the derived type of the base_object. */
6202 derived
= e
->value
.compcall
.base_object
->ts
.u
.derived
;
6205 /* If necessary, go through the inheritance chain. */
6206 while (!st
&& derived
)
6208 /* Look for the typebound procedure 'name'. */
6209 if (derived
->f2k_derived
&& derived
->f2k_derived
->tb_sym_root
)
6210 st
= gfc_find_symtree (derived
->f2k_derived
->tb_sym_root
,
6211 e
->value
.compcall
.name
);
6213 derived
= gfc_get_derived_super_type (derived
);
6216 /* Now find the specific name in the derived type namespace. */
6217 if (st
&& st
->n
.tb
&& st
->n
.tb
->u
.specific
)
6218 gfc_find_sym_tree (st
->n
.tb
->u
.specific
->name
,
6219 derived
->ns
, 1, &st
);
6227 /* Get the ultimate declared type from an expression. In addition,
6228 return the last class/derived type reference and the copy of the
6229 reference list. If check_types is set true, derived types are
6230 identified as well as class references. */
6232 get_declared_from_expr (gfc_ref
**class_ref
, gfc_ref
**new_ref
,
6233 gfc_expr
*e
, bool check_types
)
6235 gfc_symbol
*declared
;
6242 *new_ref
= gfc_copy_ref (e
->ref
);
6244 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
6246 if (ref
->type
!= REF_COMPONENT
)
6249 if ((ref
->u
.c
.component
->ts
.type
== BT_CLASS
6250 || (check_types
&& gfc_bt_struct (ref
->u
.c
.component
->ts
.type
)))
6251 && ref
->u
.c
.component
->attr
.flavor
!= FL_PROCEDURE
)
6253 declared
= ref
->u
.c
.component
->ts
.u
.derived
;
6259 if (declared
== NULL
)
6260 declared
= e
->symtree
->n
.sym
->ts
.u
.derived
;
6266 /* Given an EXPR_COMPCALL calling a GENERIC typebound procedure, figure out
6267 which of the specific bindings (if any) matches the arglist and transform
6268 the expression into a call of that binding. */
6271 resolve_typebound_generic_call (gfc_expr
* e
, const char **name
)
6273 gfc_typebound_proc
* genproc
;
6274 const char* genname
;
6276 gfc_symbol
*derived
;
6278 gcc_assert (e
->expr_type
== EXPR_COMPCALL
);
6279 genname
= e
->value
.compcall
.name
;
6280 genproc
= e
->value
.compcall
.tbp
;
6282 if (!genproc
->is_generic
)
6285 /* Try the bindings on this type and in the inheritance hierarchy. */
6286 for (; genproc
; genproc
= genproc
->overridden
)
6290 gcc_assert (genproc
->is_generic
);
6291 for (g
= genproc
->u
.generic
; g
; g
= g
->next
)
6294 gfc_actual_arglist
* args
;
6297 gcc_assert (g
->specific
);
6299 if (g
->specific
->error
)
6302 target
= g
->specific
->u
.specific
->n
.sym
;
6304 /* Get the right arglist by handling PASS/NOPASS. */
6305 args
= gfc_copy_actual_arglist (e
->value
.compcall
.actual
);
6306 if (!g
->specific
->nopass
)
6309 po
= extract_compcall_passed_object (e
);
6312 gfc_free_actual_arglist (args
);
6316 gcc_assert (g
->specific
->pass_arg_num
> 0);
6317 gcc_assert (!g
->specific
->error
);
6318 args
= update_arglist_pass (args
, po
, g
->specific
->pass_arg_num
,
6319 g
->specific
->pass_arg
);
6321 resolve_actual_arglist (args
, target
->attr
.proc
,
6322 is_external_proc (target
)
6323 && gfc_sym_get_dummy_args (target
) == NULL
);
6325 /* Check if this arglist matches the formal. */
6326 matches
= gfc_arglist_matches_symbol (&args
, target
);
6328 /* Clean up and break out of the loop if we've found it. */
6329 gfc_free_actual_arglist (args
);
6332 e
->value
.compcall
.tbp
= g
->specific
;
6333 genname
= g
->specific_st
->name
;
6334 /* Pass along the name for CLASS methods, where the vtab
6335 procedure pointer component has to be referenced. */
6343 /* Nothing matching found! */
6344 gfc_error ("Found no matching specific binding for the call to the GENERIC"
6345 " %qs at %L", genname
, &e
->where
);
6349 /* Make sure that we have the right specific instance for the name. */
6350 derived
= get_declared_from_expr (NULL
, NULL
, e
, true);
6352 st
= gfc_find_typebound_proc (derived
, NULL
, genname
, true, &e
->where
);
6354 e
->value
.compcall
.tbp
= st
->n
.tb
;
6360 /* Resolve a call to a type-bound subroutine. */
6363 resolve_typebound_call (gfc_code
* c
, const char **name
, bool *overridable
)
6365 gfc_actual_arglist
* newactual
;
6366 gfc_symtree
* target
;
6368 /* Check that's really a SUBROUTINE. */
6369 if (!c
->expr1
->value
.compcall
.tbp
->subroutine
)
6371 if (!c
->expr1
->value
.compcall
.tbp
->is_generic
6372 && c
->expr1
->value
.compcall
.tbp
->u
.specific
6373 && c
->expr1
->value
.compcall
.tbp
->u
.specific
->n
.sym
6374 && c
->expr1
->value
.compcall
.tbp
->u
.specific
->n
.sym
->attr
.subroutine
)
6375 c
->expr1
->value
.compcall
.tbp
->subroutine
= 1;
6378 gfc_error ("%qs at %L should be a SUBROUTINE",
6379 c
->expr1
->value
.compcall
.name
, &c
->loc
);
6384 if (!check_typebound_baseobject (c
->expr1
))
6387 /* Pass along the name for CLASS methods, where the vtab
6388 procedure pointer component has to be referenced. */
6390 *name
= c
->expr1
->value
.compcall
.name
;
6392 if (!resolve_typebound_generic_call (c
->expr1
, name
))
6395 /* Pass along the NON_OVERRIDABLE attribute of the specific TBP. */
6397 *overridable
= !c
->expr1
->value
.compcall
.tbp
->non_overridable
;
6399 /* Transform into an ordinary EXEC_CALL for now. */
6401 if (!resolve_typebound_static (c
->expr1
, &target
, &newactual
))
6404 c
->ext
.actual
= newactual
;
6405 c
->symtree
= target
;
6406 c
->op
= (c
->expr1
->value
.compcall
.assign
? EXEC_ASSIGN_CALL
: EXEC_CALL
);
6408 gcc_assert (!c
->expr1
->ref
&& !c
->expr1
->value
.compcall
.actual
);
6410 gfc_free_expr (c
->expr1
);
6411 c
->expr1
= gfc_get_expr ();
6412 c
->expr1
->expr_type
= EXPR_FUNCTION
;
6413 c
->expr1
->symtree
= target
;
6414 c
->expr1
->where
= c
->loc
;
6416 return resolve_call (c
);
6420 /* Resolve a component-call expression. */
6422 resolve_compcall (gfc_expr
* e
, const char **name
)
6424 gfc_actual_arglist
* newactual
;
6425 gfc_symtree
* target
;
6427 /* Check that's really a FUNCTION. */
6428 if (!e
->value
.compcall
.tbp
->function
)
6430 gfc_error ("%qs at %L should be a FUNCTION",
6431 e
->value
.compcall
.name
, &e
->where
);
6435 /* These must not be assign-calls! */
6436 gcc_assert (!e
->value
.compcall
.assign
);
6438 if (!check_typebound_baseobject (e
))
6441 /* Pass along the name for CLASS methods, where the vtab
6442 procedure pointer component has to be referenced. */
6444 *name
= e
->value
.compcall
.name
;
6446 if (!resolve_typebound_generic_call (e
, name
))
6448 gcc_assert (!e
->value
.compcall
.tbp
->is_generic
);
6450 /* Take the rank from the function's symbol. */
6451 if (e
->value
.compcall
.tbp
->u
.specific
->n
.sym
->as
)
6452 e
->rank
= e
->value
.compcall
.tbp
->u
.specific
->n
.sym
->as
->rank
;
6454 /* For now, we simply transform it into an EXPR_FUNCTION call with the same
6455 arglist to the TBP's binding target. */
6457 if (!resolve_typebound_static (e
, &target
, &newactual
))
6460 e
->value
.function
.actual
= newactual
;
6461 e
->value
.function
.name
= NULL
;
6462 e
->value
.function
.esym
= target
->n
.sym
;
6463 e
->value
.function
.isym
= NULL
;
6464 e
->symtree
= target
;
6465 e
->ts
= target
->n
.sym
->ts
;
6466 e
->expr_type
= EXPR_FUNCTION
;
6468 /* Resolution is not necessary if this is a class subroutine; this
6469 function only has to identify the specific proc. Resolution of
6470 the call will be done next in resolve_typebound_call. */
6471 return gfc_resolve_expr (e
);
6475 static bool resolve_fl_derived (gfc_symbol
*sym
);
6478 /* Resolve a typebound function, or 'method'. First separate all
6479 the non-CLASS references by calling resolve_compcall directly. */
6482 resolve_typebound_function (gfc_expr
* e
)
6484 gfc_symbol
*declared
;
6496 /* Deal with typebound operators for CLASS objects. */
6497 expr
= e
->value
.compcall
.base_object
;
6498 overridable
= !e
->value
.compcall
.tbp
->non_overridable
;
6499 if (expr
&& expr
->ts
.type
== BT_CLASS
&& e
->value
.compcall
.name
)
6501 /* If the base_object is not a variable, the corresponding actual
6502 argument expression must be stored in e->base_expression so
6503 that the corresponding tree temporary can be used as the base
6504 object in gfc_conv_procedure_call. */
6505 if (expr
->expr_type
!= EXPR_VARIABLE
)
6507 gfc_actual_arglist
*args
;
6509 for (args
= e
->value
.function
.actual
; args
; args
= args
->next
)
6511 if (expr
== args
->expr
)
6516 /* Since the typebound operators are generic, we have to ensure
6517 that any delays in resolution are corrected and that the vtab
6520 declared
= ts
.u
.derived
;
6521 c
= gfc_find_component (declared
, "_vptr", true, true, NULL
);
6522 if (c
->ts
.u
.derived
== NULL
)
6523 c
->ts
.u
.derived
= gfc_find_derived_vtab (declared
);
6525 if (!resolve_compcall (e
, &name
))
6528 /* Use the generic name if it is there. */
6529 name
= name
? name
: e
->value
.function
.esym
->name
;
6530 e
->symtree
= expr
->symtree
;
6531 e
->ref
= gfc_copy_ref (expr
->ref
);
6532 get_declared_from_expr (&class_ref
, NULL
, e
, false);
6534 /* Trim away the extraneous references that emerge from nested
6535 use of interface.c (extend_expr). */
6536 if (class_ref
&& class_ref
->next
)
6538 gfc_free_ref_list (class_ref
->next
);
6539 class_ref
->next
= NULL
;
6541 else if (e
->ref
&& !class_ref
&& expr
->ts
.type
!= BT_CLASS
)
6543 gfc_free_ref_list (e
->ref
);
6547 gfc_add_vptr_component (e
);
6548 gfc_add_component_ref (e
, name
);
6549 e
->value
.function
.esym
= NULL
;
6550 if (expr
->expr_type
!= EXPR_VARIABLE
)
6551 e
->base_expr
= expr
;
6556 return resolve_compcall (e
, NULL
);
6558 if (!resolve_ref (e
))
6561 /* Get the CLASS declared type. */
6562 declared
= get_declared_from_expr (&class_ref
, &new_ref
, e
, true);
6564 if (!resolve_fl_derived (declared
))
6567 /* Weed out cases of the ultimate component being a derived type. */
6568 if ((class_ref
&& gfc_bt_struct (class_ref
->u
.c
.component
->ts
.type
))
6569 || (!class_ref
&& st
->n
.sym
->ts
.type
!= BT_CLASS
))
6571 gfc_free_ref_list (new_ref
);
6572 return resolve_compcall (e
, NULL
);
6575 c
= gfc_find_component (declared
, "_data", true, true, NULL
);
6577 /* Treat the call as if it is a typebound procedure, in order to roll
6578 out the correct name for the specific function. */
6579 if (!resolve_compcall (e
, &name
))
6581 gfc_free_ref_list (new_ref
);
6588 /* Convert the expression to a procedure pointer component call. */
6589 e
->value
.function
.esym
= NULL
;
6595 /* '_vptr' points to the vtab, which contains the procedure pointers. */
6596 gfc_add_vptr_component (e
);
6597 gfc_add_component_ref (e
, name
);
6599 /* Recover the typespec for the expression. This is really only
6600 necessary for generic procedures, where the additional call
6601 to gfc_add_component_ref seems to throw the collection of the
6602 correct typespec. */
6606 gfc_free_ref_list (new_ref
);
6611 /* Resolve a typebound subroutine, or 'method'. First separate all
6612 the non-CLASS references by calling resolve_typebound_call
6616 resolve_typebound_subroutine (gfc_code
*code
)
6618 gfc_symbol
*declared
;
6628 st
= code
->expr1
->symtree
;
6630 /* Deal with typebound operators for CLASS objects. */
6631 expr
= code
->expr1
->value
.compcall
.base_object
;
6632 overridable
= !code
->expr1
->value
.compcall
.tbp
->non_overridable
;
6633 if (expr
&& expr
->ts
.type
== BT_CLASS
&& code
->expr1
->value
.compcall
.name
)
6635 /* If the base_object is not a variable, the corresponding actual
6636 argument expression must be stored in e->base_expression so
6637 that the corresponding tree temporary can be used as the base
6638 object in gfc_conv_procedure_call. */
6639 if (expr
->expr_type
!= EXPR_VARIABLE
)
6641 gfc_actual_arglist
*args
;
6643 args
= code
->expr1
->value
.function
.actual
;
6644 for (; args
; args
= args
->next
)
6645 if (expr
== args
->expr
)
6649 /* Since the typebound operators are generic, we have to ensure
6650 that any delays in resolution are corrected and that the vtab
6652 declared
= expr
->ts
.u
.derived
;
6653 c
= gfc_find_component (declared
, "_vptr", true, true, NULL
);
6654 if (c
->ts
.u
.derived
== NULL
)
6655 c
->ts
.u
.derived
= gfc_find_derived_vtab (declared
);
6657 if (!resolve_typebound_call (code
, &name
, NULL
))
6660 /* Use the generic name if it is there. */
6661 name
= name
? name
: code
->expr1
->value
.function
.esym
->name
;
6662 code
->expr1
->symtree
= expr
->symtree
;
6663 code
->expr1
->ref
= gfc_copy_ref (expr
->ref
);
6665 /* Trim away the extraneous references that emerge from nested
6666 use of interface.c (extend_expr). */
6667 get_declared_from_expr (&class_ref
, NULL
, code
->expr1
, false);
6668 if (class_ref
&& class_ref
->next
)
6670 gfc_free_ref_list (class_ref
->next
);
6671 class_ref
->next
= NULL
;
6673 else if (code
->expr1
->ref
&& !class_ref
)
6675 gfc_free_ref_list (code
->expr1
->ref
);
6676 code
->expr1
->ref
= NULL
;
6679 /* Now use the procedure in the vtable. */
6680 gfc_add_vptr_component (code
->expr1
);
6681 gfc_add_component_ref (code
->expr1
, name
);
6682 code
->expr1
->value
.function
.esym
= NULL
;
6683 if (expr
->expr_type
!= EXPR_VARIABLE
)
6684 code
->expr1
->base_expr
= expr
;
6689 return resolve_typebound_call (code
, NULL
, NULL
);
6691 if (!resolve_ref (code
->expr1
))
6694 /* Get the CLASS declared type. */
6695 get_declared_from_expr (&class_ref
, &new_ref
, code
->expr1
, true);
6697 /* Weed out cases of the ultimate component being a derived type. */
6698 if ((class_ref
&& gfc_bt_struct (class_ref
->u
.c
.component
->ts
.type
))
6699 || (!class_ref
&& st
->n
.sym
->ts
.type
!= BT_CLASS
))
6701 gfc_free_ref_list (new_ref
);
6702 return resolve_typebound_call (code
, NULL
, NULL
);
6705 if (!resolve_typebound_call (code
, &name
, &overridable
))
6707 gfc_free_ref_list (new_ref
);
6710 ts
= code
->expr1
->ts
;
6714 /* Convert the expression to a procedure pointer component call. */
6715 code
->expr1
->value
.function
.esym
= NULL
;
6716 code
->expr1
->symtree
= st
;
6719 code
->expr1
->ref
= new_ref
;
6721 /* '_vptr' points to the vtab, which contains the procedure pointers. */
6722 gfc_add_vptr_component (code
->expr1
);
6723 gfc_add_component_ref (code
->expr1
, name
);
6725 /* Recover the typespec for the expression. This is really only
6726 necessary for generic procedures, where the additional call
6727 to gfc_add_component_ref seems to throw the collection of the
6728 correct typespec. */
6729 code
->expr1
->ts
= ts
;
6732 gfc_free_ref_list (new_ref
);
6738 /* Resolve a CALL to a Procedure Pointer Component (Subroutine). */
6741 resolve_ppc_call (gfc_code
* c
)
6743 gfc_component
*comp
;
6745 comp
= gfc_get_proc_ptr_comp (c
->expr1
);
6746 gcc_assert (comp
!= NULL
);
6748 c
->resolved_sym
= c
->expr1
->symtree
->n
.sym
;
6749 c
->expr1
->expr_type
= EXPR_VARIABLE
;
6751 if (!comp
->attr
.subroutine
)
6752 gfc_add_subroutine (&comp
->attr
, comp
->name
, &c
->expr1
->where
);
6754 if (!resolve_ref (c
->expr1
))
6757 if (!update_ppc_arglist (c
->expr1
))
6760 c
->ext
.actual
= c
->expr1
->value
.compcall
.actual
;
6762 if (!resolve_actual_arglist (c
->ext
.actual
, comp
->attr
.proc
,
6763 !(comp
->ts
.interface
6764 && comp
->ts
.interface
->formal
)))
6767 if (!pure_subroutine (comp
->ts
.interface
, comp
->name
, &c
->expr1
->where
))
6770 gfc_ppc_use (comp
, &c
->expr1
->value
.compcall
.actual
, &c
->expr1
->where
);
6776 /* Resolve a Function Call to a Procedure Pointer Component (Function). */
6779 resolve_expr_ppc (gfc_expr
* e
)
6781 gfc_component
*comp
;
6783 comp
= gfc_get_proc_ptr_comp (e
);
6784 gcc_assert (comp
!= NULL
);
6786 /* Convert to EXPR_FUNCTION. */
6787 e
->expr_type
= EXPR_FUNCTION
;
6788 e
->value
.function
.isym
= NULL
;
6789 e
->value
.function
.actual
= e
->value
.compcall
.actual
;
6791 if (comp
->as
!= NULL
)
6792 e
->rank
= comp
->as
->rank
;
6794 if (!comp
->attr
.function
)
6795 gfc_add_function (&comp
->attr
, comp
->name
, &e
->where
);
6797 if (!resolve_ref (e
))
6800 if (!resolve_actual_arglist (e
->value
.function
.actual
, comp
->attr
.proc
,
6801 !(comp
->ts
.interface
6802 && comp
->ts
.interface
->formal
)))
6805 if (!update_ppc_arglist (e
))
6808 if (!check_pure_function(e
))
6811 gfc_ppc_use (comp
, &e
->value
.compcall
.actual
, &e
->where
);
6818 gfc_is_expandable_expr (gfc_expr
*e
)
6820 gfc_constructor
*con
;
6822 if (e
->expr_type
== EXPR_ARRAY
)
6824 /* Traverse the constructor looking for variables that are flavor
6825 parameter. Parameters must be expanded since they are fully used at
6827 con
= gfc_constructor_first (e
->value
.constructor
);
6828 for (; con
; con
= gfc_constructor_next (con
))
6830 if (con
->expr
->expr_type
== EXPR_VARIABLE
6831 && con
->expr
->symtree
6832 && (con
->expr
->symtree
->n
.sym
->attr
.flavor
== FL_PARAMETER
6833 || con
->expr
->symtree
->n
.sym
->attr
.flavor
== FL_VARIABLE
))
6835 if (con
->expr
->expr_type
== EXPR_ARRAY
6836 && gfc_is_expandable_expr (con
->expr
))
6845 /* Sometimes variables in specification expressions of the result
6846 of module procedures in submodules wind up not being the 'real'
6847 dummy. Find this, if possible, in the namespace of the first
6851 fixup_unique_dummy (gfc_expr
*e
)
6853 gfc_symtree
*st
= NULL
;
6854 gfc_symbol
*s
= NULL
;
6856 if (e
->symtree
->n
.sym
->ns
->proc_name
6857 && e
->symtree
->n
.sym
->ns
->proc_name
->formal
)
6858 s
= e
->symtree
->n
.sym
->ns
->proc_name
->formal
->sym
;
6861 st
= gfc_find_symtree (s
->ns
->sym_root
, e
->symtree
->n
.sym
->name
);
6864 && st
->n
.sym
!= NULL
6865 && st
->n
.sym
->attr
.dummy
)
6869 /* Resolve an expression. That is, make sure that types of operands agree
6870 with their operators, intrinsic operators are converted to function calls
6871 for overloaded types and unresolved function references are resolved. */
6874 gfc_resolve_expr (gfc_expr
*e
)
6877 bool inquiry_save
, actual_arg_save
, first_actual_arg_save
;
6882 /* inquiry_argument only applies to variables. */
6883 inquiry_save
= inquiry_argument
;
6884 actual_arg_save
= actual_arg
;
6885 first_actual_arg_save
= first_actual_arg
;
6887 if (e
->expr_type
!= EXPR_VARIABLE
)
6889 inquiry_argument
= false;
6891 first_actual_arg
= false;
6893 else if (e
->symtree
!= NULL
6894 && *e
->symtree
->name
== '@'
6895 && e
->symtree
->n
.sym
->attr
.dummy
)
6897 /* Deal with submodule specification expressions that are not
6898 found to be referenced in module.c(read_cleanup). */
6899 fixup_unique_dummy (e
);
6902 switch (e
->expr_type
)
6905 t
= resolve_operator (e
);
6911 if (check_host_association (e
))
6912 t
= resolve_function (e
);
6914 t
= resolve_variable (e
);
6916 if (e
->ts
.type
== BT_CHARACTER
&& e
->ts
.u
.cl
== NULL
&& e
->ref
6917 && e
->ref
->type
!= REF_SUBSTRING
)
6918 gfc_resolve_substring_charlen (e
);
6923 t
= resolve_typebound_function (e
);
6926 case EXPR_SUBSTRING
:
6927 t
= resolve_ref (e
);
6936 t
= resolve_expr_ppc (e
);
6941 if (!resolve_ref (e
))
6944 t
= gfc_resolve_array_constructor (e
);
6945 /* Also try to expand a constructor. */
6948 expression_rank (e
);
6949 if (gfc_is_constant_expr (e
) || gfc_is_expandable_expr (e
))
6950 gfc_expand_constructor (e
, false);
6953 /* This provides the opportunity for the length of constructors with
6954 character valued function elements to propagate the string length
6955 to the expression. */
6956 if (t
&& e
->ts
.type
== BT_CHARACTER
)
6958 /* For efficiency, we call gfc_expand_constructor for BT_CHARACTER
6959 here rather then add a duplicate test for it above. */
6960 gfc_expand_constructor (e
, false);
6961 t
= gfc_resolve_character_array_constructor (e
);
6966 case EXPR_STRUCTURE
:
6967 t
= resolve_ref (e
);
6971 t
= resolve_structure_cons (e
, 0);
6975 t
= gfc_simplify_expr (e
, 0);
6979 gfc_internal_error ("gfc_resolve_expr(): Bad expression type");
6982 if (e
->ts
.type
== BT_CHARACTER
&& t
&& !e
->ts
.u
.cl
)
6985 inquiry_argument
= inquiry_save
;
6986 actual_arg
= actual_arg_save
;
6987 first_actual_arg
= first_actual_arg_save
;
6993 /* Resolve an expression from an iterator. They must be scalar and have
6994 INTEGER or (optionally) REAL type. */
6997 gfc_resolve_iterator_expr (gfc_expr
*expr
, bool real_ok
,
6998 const char *name_msgid
)
7000 if (!gfc_resolve_expr (expr
))
7003 if (expr
->rank
!= 0)
7005 gfc_error ("%s at %L must be a scalar", _(name_msgid
), &expr
->where
);
7009 if (expr
->ts
.type
!= BT_INTEGER
)
7011 if (expr
->ts
.type
== BT_REAL
)
7014 return gfc_notify_std (GFC_STD_F95_DEL
,
7015 "%s at %L must be integer",
7016 _(name_msgid
), &expr
->where
);
7019 gfc_error ("%s at %L must be INTEGER", _(name_msgid
),
7026 gfc_error ("%s at %L must be INTEGER", _(name_msgid
), &expr
->where
);
7034 /* Resolve the expressions in an iterator structure. If REAL_OK is
7035 false allow only INTEGER type iterators, otherwise allow REAL types.
7036 Set own_scope to true for ac-implied-do and data-implied-do as those
7037 have a separate scope such that, e.g., a INTENT(IN) doesn't apply. */
7040 gfc_resolve_iterator (gfc_iterator
*iter
, bool real_ok
, bool own_scope
)
7042 if (!gfc_resolve_iterator_expr (iter
->var
, real_ok
, "Loop variable"))
7045 if (!gfc_check_vardef_context (iter
->var
, false, false, own_scope
,
7046 _("iterator variable")))
7049 if (!gfc_resolve_iterator_expr (iter
->start
, real_ok
,
7050 "Start expression in DO loop"))
7053 if (!gfc_resolve_iterator_expr (iter
->end
, real_ok
,
7054 "End expression in DO loop"))
7057 if (!gfc_resolve_iterator_expr (iter
->step
, real_ok
,
7058 "Step expression in DO loop"))
7061 if (iter
->step
->expr_type
== EXPR_CONSTANT
)
7063 if ((iter
->step
->ts
.type
== BT_INTEGER
7064 && mpz_cmp_ui (iter
->step
->value
.integer
, 0) == 0)
7065 || (iter
->step
->ts
.type
== BT_REAL
7066 && mpfr_sgn (iter
->step
->value
.real
) == 0))
7068 gfc_error ("Step expression in DO loop at %L cannot be zero",
7069 &iter
->step
->where
);
7074 /* Convert start, end, and step to the same type as var. */
7075 if (iter
->start
->ts
.kind
!= iter
->var
->ts
.kind
7076 || iter
->start
->ts
.type
!= iter
->var
->ts
.type
)
7077 gfc_convert_type (iter
->start
, &iter
->var
->ts
, 1);
7079 if (iter
->end
->ts
.kind
!= iter
->var
->ts
.kind
7080 || iter
->end
->ts
.type
!= iter
->var
->ts
.type
)
7081 gfc_convert_type (iter
->end
, &iter
->var
->ts
, 1);
7083 if (iter
->step
->ts
.kind
!= iter
->var
->ts
.kind
7084 || iter
->step
->ts
.type
!= iter
->var
->ts
.type
)
7085 gfc_convert_type (iter
->step
, &iter
->var
->ts
, 1);
7087 if (iter
->start
->expr_type
== EXPR_CONSTANT
7088 && iter
->end
->expr_type
== EXPR_CONSTANT
7089 && iter
->step
->expr_type
== EXPR_CONSTANT
)
7092 if (iter
->start
->ts
.type
== BT_INTEGER
)
7094 sgn
= mpz_cmp_ui (iter
->step
->value
.integer
, 0);
7095 cmp
= mpz_cmp (iter
->end
->value
.integer
, iter
->start
->value
.integer
);
7099 sgn
= mpfr_sgn (iter
->step
->value
.real
);
7100 cmp
= mpfr_cmp (iter
->end
->value
.real
, iter
->start
->value
.real
);
7102 if (warn_zerotrip
&& ((sgn
> 0 && cmp
< 0) || (sgn
< 0 && cmp
> 0)))
7103 gfc_warning (OPT_Wzerotrip
,
7104 "DO loop at %L will be executed zero times",
7105 &iter
->step
->where
);
7108 if (iter
->end
->expr_type
== EXPR_CONSTANT
7109 && iter
->end
->ts
.type
== BT_INTEGER
7110 && iter
->step
->expr_type
== EXPR_CONSTANT
7111 && iter
->step
->ts
.type
== BT_INTEGER
7112 && (mpz_cmp_si (iter
->step
->value
.integer
, -1L) == 0
7113 || mpz_cmp_si (iter
->step
->value
.integer
, 1L) == 0))
7115 bool is_step_positive
= mpz_cmp_ui (iter
->step
->value
.integer
, 1) == 0;
7116 int k
= gfc_validate_kind (BT_INTEGER
, iter
->end
->ts
.kind
, false);
7118 if (is_step_positive
7119 && mpz_cmp (iter
->end
->value
.integer
, gfc_integer_kinds
[k
].huge
) == 0)
7120 gfc_warning (OPT_Wundefined_do_loop
,
7121 "DO loop at %L is undefined as it overflows",
7122 &iter
->step
->where
);
7123 else if (!is_step_positive
7124 && mpz_cmp (iter
->end
->value
.integer
,
7125 gfc_integer_kinds
[k
].min_int
) == 0)
7126 gfc_warning (OPT_Wundefined_do_loop
,
7127 "DO loop at %L is undefined as it underflows",
7128 &iter
->step
->where
);
7135 /* Traversal function for find_forall_index. f == 2 signals that
7136 that variable itself is not to be checked - only the references. */
7139 forall_index (gfc_expr
*expr
, gfc_symbol
*sym
, int *f
)
7141 if (expr
->expr_type
!= EXPR_VARIABLE
)
7144 /* A scalar assignment */
7145 if (!expr
->ref
|| *f
== 1)
7147 if (expr
->symtree
->n
.sym
== sym
)
7159 /* Check whether the FORALL index appears in the expression or not.
7160 Returns true if SYM is found in EXPR. */
7163 find_forall_index (gfc_expr
*expr
, gfc_symbol
*sym
, int f
)
7165 if (gfc_traverse_expr (expr
, sym
, forall_index
, f
))
7172 /* Resolve a list of FORALL iterators. The FORALL index-name is constrained
7173 to be a scalar INTEGER variable. The subscripts and stride are scalar
7174 INTEGERs, and if stride is a constant it must be nonzero.
7175 Furthermore "A subscript or stride in a forall-triplet-spec shall
7176 not contain a reference to any index-name in the
7177 forall-triplet-spec-list in which it appears." (7.5.4.1) */
7180 resolve_forall_iterators (gfc_forall_iterator
*it
)
7182 gfc_forall_iterator
*iter
, *iter2
;
7184 for (iter
= it
; iter
; iter
= iter
->next
)
7186 if (gfc_resolve_expr (iter
->var
)
7187 && (iter
->var
->ts
.type
!= BT_INTEGER
|| iter
->var
->rank
!= 0))
7188 gfc_error ("FORALL index-name at %L must be a scalar INTEGER",
7191 if (gfc_resolve_expr (iter
->start
)
7192 && (iter
->start
->ts
.type
!= BT_INTEGER
|| iter
->start
->rank
!= 0))
7193 gfc_error ("FORALL start expression at %L must be a scalar INTEGER",
7194 &iter
->start
->where
);
7195 if (iter
->var
->ts
.kind
!= iter
->start
->ts
.kind
)
7196 gfc_convert_type (iter
->start
, &iter
->var
->ts
, 1);
7198 if (gfc_resolve_expr (iter
->end
)
7199 && (iter
->end
->ts
.type
!= BT_INTEGER
|| iter
->end
->rank
!= 0))
7200 gfc_error ("FORALL end expression at %L must be a scalar INTEGER",
7202 if (iter
->var
->ts
.kind
!= iter
->end
->ts
.kind
)
7203 gfc_convert_type (iter
->end
, &iter
->var
->ts
, 1);
7205 if (gfc_resolve_expr (iter
->stride
))
7207 if (iter
->stride
->ts
.type
!= BT_INTEGER
|| iter
->stride
->rank
!= 0)
7208 gfc_error ("FORALL stride expression at %L must be a scalar %s",
7209 &iter
->stride
->where
, "INTEGER");
7211 if (iter
->stride
->expr_type
== EXPR_CONSTANT
7212 && mpz_cmp_ui (iter
->stride
->value
.integer
, 0) == 0)
7213 gfc_error ("FORALL stride expression at %L cannot be zero",
7214 &iter
->stride
->where
);
7216 if (iter
->var
->ts
.kind
!= iter
->stride
->ts
.kind
)
7217 gfc_convert_type (iter
->stride
, &iter
->var
->ts
, 1);
7220 for (iter
= it
; iter
; iter
= iter
->next
)
7221 for (iter2
= iter
; iter2
; iter2
= iter2
->next
)
7223 if (find_forall_index (iter2
->start
, iter
->var
->symtree
->n
.sym
, 0)
7224 || find_forall_index (iter2
->end
, iter
->var
->symtree
->n
.sym
, 0)
7225 || find_forall_index (iter2
->stride
, iter
->var
->symtree
->n
.sym
, 0))
7226 gfc_error ("FORALL index %qs may not appear in triplet "
7227 "specification at %L", iter
->var
->symtree
->name
,
7228 &iter2
->start
->where
);
7233 /* Given a pointer to a symbol that is a derived type, see if it's
7234 inaccessible, i.e. if it's defined in another module and the components are
7235 PRIVATE. The search is recursive if necessary. Returns zero if no
7236 inaccessible components are found, nonzero otherwise. */
7239 derived_inaccessible (gfc_symbol
*sym
)
7243 if (sym
->attr
.use_assoc
&& sym
->attr
.private_comp
)
7246 for (c
= sym
->components
; c
; c
= c
->next
)
7248 /* Prevent an infinite loop through this function. */
7249 if (c
->ts
.type
== BT_DERIVED
&& c
->attr
.pointer
7250 && sym
== c
->ts
.u
.derived
)
7253 if (c
->ts
.type
== BT_DERIVED
&& derived_inaccessible (c
->ts
.u
.derived
))
7261 /* Resolve the argument of a deallocate expression. The expression must be
7262 a pointer or a full array. */
7265 resolve_deallocate_expr (gfc_expr
*e
)
7267 symbol_attribute attr
;
7268 int allocatable
, pointer
;
7274 if (!gfc_resolve_expr (e
))
7277 if (e
->expr_type
!= EXPR_VARIABLE
)
7280 sym
= e
->symtree
->n
.sym
;
7281 unlimited
= UNLIMITED_POLY(sym
);
7283 if (sym
->ts
.type
== BT_CLASS
)
7285 allocatable
= CLASS_DATA (sym
)->attr
.allocatable
;
7286 pointer
= CLASS_DATA (sym
)->attr
.class_pointer
;
7290 allocatable
= sym
->attr
.allocatable
;
7291 pointer
= sym
->attr
.pointer
;
7293 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
7298 if (ref
->u
.ar
.type
!= AR_FULL
7299 && !(ref
->u
.ar
.type
== AR_ELEMENT
&& ref
->u
.ar
.as
->rank
== 0
7300 && ref
->u
.ar
.codimen
&& gfc_ref_this_image (ref
)))
7305 c
= ref
->u
.c
.component
;
7306 if (c
->ts
.type
== BT_CLASS
)
7308 allocatable
= CLASS_DATA (c
)->attr
.allocatable
;
7309 pointer
= CLASS_DATA (c
)->attr
.class_pointer
;
7313 allocatable
= c
->attr
.allocatable
;
7314 pointer
= c
->attr
.pointer
;
7325 attr
= gfc_expr_attr (e
);
7327 if (allocatable
== 0 && attr
.pointer
== 0 && !unlimited
)
7330 gfc_error ("Allocate-object at %L must be ALLOCATABLE or a POINTER",
7336 if (gfc_is_coindexed (e
))
7338 gfc_error ("Coindexed allocatable object at %L", &e
->where
);
7343 && !gfc_check_vardef_context (e
, true, true, false,
7344 _("DEALLOCATE object")))
7346 if (!gfc_check_vardef_context (e
, false, true, false,
7347 _("DEALLOCATE object")))
7354 /* Returns true if the expression e contains a reference to the symbol sym. */
7356 sym_in_expr (gfc_expr
*e
, gfc_symbol
*sym
, int *f ATTRIBUTE_UNUSED
)
7358 if (e
->expr_type
== EXPR_VARIABLE
&& e
->symtree
->n
.sym
== sym
)
7365 gfc_find_sym_in_expr (gfc_symbol
*sym
, gfc_expr
*e
)
7367 return gfc_traverse_expr (e
, sym
, sym_in_expr
, 0);
7371 /* Given the expression node e for an allocatable/pointer of derived type to be
7372 allocated, get the expression node to be initialized afterwards (needed for
7373 derived types with default initializers, and derived types with allocatable
7374 components that need nullification.) */
7377 gfc_expr_to_initialize (gfc_expr
*e
)
7383 result
= gfc_copy_expr (e
);
7385 /* Change the last array reference from AR_ELEMENT to AR_FULL. */
7386 for (ref
= result
->ref
; ref
; ref
= ref
->next
)
7387 if (ref
->type
== REF_ARRAY
&& ref
->next
== NULL
)
7389 ref
->u
.ar
.type
= AR_FULL
;
7391 for (i
= 0; i
< ref
->u
.ar
.dimen
; i
++)
7392 ref
->u
.ar
.start
[i
] = ref
->u
.ar
.end
[i
] = ref
->u
.ar
.stride
[i
] = NULL
;
7397 gfc_free_shape (&result
->shape
, result
->rank
);
7399 /* Recalculate rank, shape, etc. */
7400 gfc_resolve_expr (result
);
7405 /* If the last ref of an expression is an array ref, return a copy of the
7406 expression with that one removed. Otherwise, a copy of the original
7407 expression. This is used for allocate-expressions and pointer assignment
7408 LHS, where there may be an array specification that needs to be stripped
7409 off when using gfc_check_vardef_context. */
7412 remove_last_array_ref (gfc_expr
* e
)
7417 e2
= gfc_copy_expr (e
);
7418 for (r
= &e2
->ref
; *r
; r
= &(*r
)->next
)
7419 if ((*r
)->type
== REF_ARRAY
&& !(*r
)->next
)
7421 gfc_free_ref_list (*r
);
7430 /* Used in resolve_allocate_expr to check that a allocation-object and
7431 a source-expr are conformable. This does not catch all possible
7432 cases; in particular a runtime checking is needed. */
7435 conformable_arrays (gfc_expr
*e1
, gfc_expr
*e2
)
7438 for (tail
= e2
->ref
; tail
&& tail
->next
; tail
= tail
->next
);
7440 /* First compare rank. */
7441 if ((tail
&& e1
->rank
!= tail
->u
.ar
.as
->rank
)
7442 || (!tail
&& e1
->rank
!= e2
->rank
))
7444 gfc_error ("Source-expr at %L must be scalar or have the "
7445 "same rank as the allocate-object at %L",
7446 &e1
->where
, &e2
->where
);
7457 for (i
= 0; i
< e1
->rank
; i
++)
7459 if (tail
->u
.ar
.start
[i
] == NULL
)
7462 if (tail
->u
.ar
.end
[i
])
7464 mpz_set (s
, tail
->u
.ar
.end
[i
]->value
.integer
);
7465 mpz_sub (s
, s
, tail
->u
.ar
.start
[i
]->value
.integer
);
7466 mpz_add_ui (s
, s
, 1);
7470 mpz_set (s
, tail
->u
.ar
.start
[i
]->value
.integer
);
7473 if (mpz_cmp (e1
->shape
[i
], s
) != 0)
7475 gfc_error ("Source-expr at %L and allocate-object at %L must "
7476 "have the same shape", &e1
->where
, &e2
->where
);
7489 /* Resolve the expression in an ALLOCATE statement, doing the additional
7490 checks to see whether the expression is OK or not. The expression must
7491 have a trailing array reference that gives the size of the array. */
7494 resolve_allocate_expr (gfc_expr
*e
, gfc_code
*code
, bool *array_alloc_wo_spec
)
7496 int i
, pointer
, allocatable
, dimension
, is_abstract
;
7500 symbol_attribute attr
;
7501 gfc_ref
*ref
, *ref2
;
7504 gfc_symbol
*sym
= NULL
;
7509 /* Mark the utmost array component as being in allocate to allow DIMEN_STAR
7510 checking of coarrays. */
7511 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
7512 if (ref
->next
== NULL
)
7515 if (ref
&& ref
->type
== REF_ARRAY
)
7516 ref
->u
.ar
.in_allocate
= true;
7518 if (!gfc_resolve_expr (e
))
7521 /* Make sure the expression is allocatable or a pointer. If it is
7522 pointer, the next-to-last reference must be a pointer. */
7526 sym
= e
->symtree
->n
.sym
;
7528 /* Check whether ultimate component is abstract and CLASS. */
7531 /* Is the allocate-object unlimited polymorphic? */
7532 unlimited
= UNLIMITED_POLY(e
);
7534 if (e
->expr_type
!= EXPR_VARIABLE
)
7537 attr
= gfc_expr_attr (e
);
7538 pointer
= attr
.pointer
;
7539 dimension
= attr
.dimension
;
7540 codimension
= attr
.codimension
;
7544 if (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
))
7546 allocatable
= CLASS_DATA (sym
)->attr
.allocatable
;
7547 pointer
= CLASS_DATA (sym
)->attr
.class_pointer
;
7548 dimension
= CLASS_DATA (sym
)->attr
.dimension
;
7549 codimension
= CLASS_DATA (sym
)->attr
.codimension
;
7550 is_abstract
= CLASS_DATA (sym
)->attr
.abstract
;
7554 allocatable
= sym
->attr
.allocatable
;
7555 pointer
= sym
->attr
.pointer
;
7556 dimension
= sym
->attr
.dimension
;
7557 codimension
= sym
->attr
.codimension
;
7562 for (ref
= e
->ref
; ref
; ref2
= ref
, ref
= ref
->next
)
7567 if (ref
->u
.ar
.codimen
> 0)
7570 for (n
= ref
->u
.ar
.dimen
;
7571 n
< ref
->u
.ar
.dimen
+ ref
->u
.ar
.codimen
; n
++)
7572 if (ref
->u
.ar
.dimen_type
[n
] != DIMEN_THIS_IMAGE
)
7579 if (ref
->next
!= NULL
)
7587 gfc_error ("Coindexed allocatable object at %L",
7592 c
= ref
->u
.c
.component
;
7593 if (c
->ts
.type
== BT_CLASS
)
7595 allocatable
= CLASS_DATA (c
)->attr
.allocatable
;
7596 pointer
= CLASS_DATA (c
)->attr
.class_pointer
;
7597 dimension
= CLASS_DATA (c
)->attr
.dimension
;
7598 codimension
= CLASS_DATA (c
)->attr
.codimension
;
7599 is_abstract
= CLASS_DATA (c
)->attr
.abstract
;
7603 allocatable
= c
->attr
.allocatable
;
7604 pointer
= c
->attr
.pointer
;
7605 dimension
= c
->attr
.dimension
;
7606 codimension
= c
->attr
.codimension
;
7607 is_abstract
= c
->attr
.abstract
;
7620 /* Check for F08:C628. */
7621 if (allocatable
== 0 && pointer
== 0 && !unlimited
)
7623 gfc_error ("Allocate-object at %L must be ALLOCATABLE or a POINTER",
7628 /* Some checks for the SOURCE tag. */
7631 /* Check F03:C631. */
7632 if (!gfc_type_compatible (&e
->ts
, &code
->expr3
->ts
))
7634 gfc_error ("Type of entity at %L is type incompatible with "
7635 "source-expr at %L", &e
->where
, &code
->expr3
->where
);
7639 /* Check F03:C632 and restriction following Note 6.18. */
7640 if (code
->expr3
->rank
> 0 && !conformable_arrays (code
->expr3
, e
))
7643 /* Check F03:C633. */
7644 if (code
->expr3
->ts
.kind
!= e
->ts
.kind
&& !unlimited
)
7646 gfc_error ("The allocate-object at %L and the source-expr at %L "
7647 "shall have the same kind type parameter",
7648 &e
->where
, &code
->expr3
->where
);
7652 /* Check F2008, C642. */
7653 if (code
->expr3
->ts
.type
== BT_DERIVED
7654 && ((codimension
&& gfc_expr_attr (code
->expr3
).lock_comp
)
7655 || (code
->expr3
->ts
.u
.derived
->from_intmod
7656 == INTMOD_ISO_FORTRAN_ENV
7657 && code
->expr3
->ts
.u
.derived
->intmod_sym_id
7658 == ISOFORTRAN_LOCK_TYPE
)))
7660 gfc_error ("The source-expr at %L shall neither be of type "
7661 "LOCK_TYPE nor have a LOCK_TYPE component if "
7662 "allocate-object at %L is a coarray",
7663 &code
->expr3
->where
, &e
->where
);
7667 /* Check TS18508, C702/C703. */
7668 if (code
->expr3
->ts
.type
== BT_DERIVED
7669 && ((codimension
&& gfc_expr_attr (code
->expr3
).event_comp
)
7670 || (code
->expr3
->ts
.u
.derived
->from_intmod
7671 == INTMOD_ISO_FORTRAN_ENV
7672 && code
->expr3
->ts
.u
.derived
->intmod_sym_id
7673 == ISOFORTRAN_EVENT_TYPE
)))
7675 gfc_error ("The source-expr at %L shall neither be of type "
7676 "EVENT_TYPE nor have a EVENT_TYPE component if "
7677 "allocate-object at %L is a coarray",
7678 &code
->expr3
->where
, &e
->where
);
7683 /* Check F08:C629. */
7684 if (is_abstract
&& code
->ext
.alloc
.ts
.type
== BT_UNKNOWN
7687 gcc_assert (e
->ts
.type
== BT_CLASS
);
7688 gfc_error ("Allocating %s of ABSTRACT base type at %L requires a "
7689 "type-spec or source-expr", sym
->name
, &e
->where
);
7693 /* Check F08:C632. */
7694 if (code
->ext
.alloc
.ts
.type
== BT_CHARACTER
&& !e
->ts
.deferred
7695 && !UNLIMITED_POLY (e
))
7699 if (!e
->ts
.u
.cl
->length
)
7702 cmp
= gfc_dep_compare_expr (e
->ts
.u
.cl
->length
,
7703 code
->ext
.alloc
.ts
.u
.cl
->length
);
7704 if (cmp
== 1 || cmp
== -1 || cmp
== -3)
7706 gfc_error ("Allocating %s at %L with type-spec requires the same "
7707 "character-length parameter as in the declaration",
7708 sym
->name
, &e
->where
);
7713 /* In the variable definition context checks, gfc_expr_attr is used
7714 on the expression. This is fooled by the array specification
7715 present in e, thus we have to eliminate that one temporarily. */
7716 e2
= remove_last_array_ref (e
);
7719 t
= gfc_check_vardef_context (e2
, true, true, false,
7720 _("ALLOCATE object"));
7722 t
= gfc_check_vardef_context (e2
, false, true, false,
7723 _("ALLOCATE object"));
7728 if (e
->ts
.type
== BT_CLASS
&& CLASS_DATA (e
)->attr
.dimension
7729 && !code
->expr3
&& code
->ext
.alloc
.ts
.type
== BT_DERIVED
)
7731 /* For class arrays, the initialization with SOURCE is done
7732 using _copy and trans_call. It is convenient to exploit that
7733 when the allocated type is different from the declared type but
7734 no SOURCE exists by setting expr3. */
7735 code
->expr3
= gfc_default_initializer (&code
->ext
.alloc
.ts
);
7737 else if (flag_coarray
!= GFC_FCOARRAY_LIB
&& e
->ts
.type
== BT_DERIVED
7738 && e
->ts
.u
.derived
->from_intmod
== INTMOD_ISO_FORTRAN_ENV
7739 && e
->ts
.u
.derived
->intmod_sym_id
== ISOFORTRAN_EVENT_TYPE
)
7741 /* We have to zero initialize the integer variable. */
7742 code
->expr3
= gfc_get_int_expr (gfc_default_integer_kind
, &e
->where
, 0);
7745 if (e
->ts
.type
== BT_CLASS
&& !unlimited
&& !UNLIMITED_POLY (code
->expr3
))
7747 /* Make sure the vtab symbol is present when
7748 the module variables are generated. */
7749 gfc_typespec ts
= e
->ts
;
7751 ts
= code
->expr3
->ts
;
7752 else if (code
->ext
.alloc
.ts
.type
== BT_DERIVED
)
7753 ts
= code
->ext
.alloc
.ts
;
7755 /* Finding the vtab also publishes the type's symbol. Therefore this
7756 statement is necessary. */
7757 gfc_find_derived_vtab (ts
.u
.derived
);
7759 else if (unlimited
&& !UNLIMITED_POLY (code
->expr3
))
7761 /* Again, make sure the vtab symbol is present when
7762 the module variables are generated. */
7763 gfc_typespec
*ts
= NULL
;
7765 ts
= &code
->expr3
->ts
;
7767 ts
= &code
->ext
.alloc
.ts
;
7771 /* Finding the vtab also publishes the type's symbol. Therefore this
7772 statement is necessary. */
7776 if (dimension
== 0 && codimension
== 0)
7779 /* Make sure the last reference node is an array specification. */
7781 if (!ref2
|| ref2
->type
!= REF_ARRAY
|| ref2
->u
.ar
.type
== AR_FULL
7782 || (dimension
&& ref2
->u
.ar
.dimen
== 0))
7787 if (!gfc_notify_std (GFC_STD_F2008
, "Array specification required "
7788 "in ALLOCATE statement at %L", &e
->where
))
7790 if (code
->expr3
->rank
!= 0)
7791 *array_alloc_wo_spec
= true;
7794 gfc_error ("Array specification or array-valued SOURCE= "
7795 "expression required in ALLOCATE statement at %L",
7802 gfc_error ("Array specification required in ALLOCATE statement "
7803 "at %L", &e
->where
);
7808 /* Make sure that the array section reference makes sense in the
7809 context of an ALLOCATE specification. */
7814 for (i
= ar
->dimen
; i
< ar
->dimen
+ ar
->codimen
; i
++)
7816 switch (ar
->dimen_type
[i
])
7818 case DIMEN_THIS_IMAGE
:
7819 gfc_error ("Coarray specification required in ALLOCATE statement "
7820 "at %L", &e
->where
);
7824 if (ar
->start
[i
] == 0 || ar
->end
[i
] == 0)
7826 /* If ar->stride[i] is NULL, we issued a previous error. */
7827 if (ar
->stride
[i
] == NULL
)
7828 gfc_error ("Bad array specification in ALLOCATE statement "
7829 "at %L", &e
->where
);
7832 else if (gfc_dep_compare_expr (ar
->start
[i
], ar
->end
[i
]) == 1)
7834 gfc_error ("Upper cobound is less than lower cobound at %L",
7835 &ar
->start
[i
]->where
);
7841 if (ar
->start
[i
]->expr_type
== EXPR_CONSTANT
)
7843 gcc_assert (ar
->start
[i
]->ts
.type
== BT_INTEGER
);
7844 if (mpz_cmp_si (ar
->start
[i
]->value
.integer
, 1) < 0)
7846 gfc_error ("Upper cobound is less than lower cobound "
7847 "of 1 at %L", &ar
->start
[i
]->where
);
7857 gfc_error ("Bad array specification in ALLOCATE statement at %L",
7863 for (i
= 0; i
< ar
->dimen
; i
++)
7865 if (ar
->type
== AR_ELEMENT
|| ar
->type
== AR_FULL
)
7868 switch (ar
->dimen_type
[i
])
7874 if (ar
->start
[i
] != NULL
7875 && ar
->end
[i
] != NULL
7876 && ar
->stride
[i
] == NULL
)
7884 case DIMEN_THIS_IMAGE
:
7885 gfc_error ("Bad array specification in ALLOCATE statement at %L",
7891 for (a
= code
->ext
.alloc
.list
; a
; a
= a
->next
)
7893 sym
= a
->expr
->symtree
->n
.sym
;
7895 /* TODO - check derived type components. */
7896 if (gfc_bt_struct (sym
->ts
.type
) || sym
->ts
.type
== BT_CLASS
)
7899 if ((ar
->start
[i
] != NULL
7900 && gfc_find_sym_in_expr (sym
, ar
->start
[i
]))
7901 || (ar
->end
[i
] != NULL
7902 && gfc_find_sym_in_expr (sym
, ar
->end
[i
])))
7904 gfc_error ("%qs must not appear in the array specification at "
7905 "%L in the same ALLOCATE statement where it is "
7906 "itself allocated", sym
->name
, &ar
->where
);
7912 for (i
= ar
->dimen
; i
< ar
->codimen
+ ar
->dimen
; i
++)
7914 if (ar
->dimen_type
[i
] == DIMEN_ELEMENT
7915 || ar
->dimen_type
[i
] == DIMEN_RANGE
)
7917 if (i
== (ar
->dimen
+ ar
->codimen
- 1))
7919 gfc_error ("Expected '*' in coindex specification in ALLOCATE "
7920 "statement at %L", &e
->where
);
7926 if (ar
->dimen_type
[i
] == DIMEN_STAR
&& i
== (ar
->dimen
+ ar
->codimen
- 1)
7927 && ar
->stride
[i
] == NULL
)
7930 gfc_error ("Bad coarray specification in ALLOCATE statement at %L",
7944 resolve_allocate_deallocate (gfc_code
*code
, const char *fcn
)
7946 gfc_expr
*stat
, *errmsg
, *pe
, *qe
;
7947 gfc_alloc
*a
, *p
, *q
;
7950 errmsg
= code
->expr2
;
7952 /* Check the stat variable. */
7955 gfc_check_vardef_context (stat
, false, false, false,
7956 _("STAT variable"));
7958 if ((stat
->ts
.type
!= BT_INTEGER
7959 && !(stat
->ref
&& (stat
->ref
->type
== REF_ARRAY
7960 || stat
->ref
->type
== REF_COMPONENT
)))
7962 gfc_error ("Stat-variable at %L must be a scalar INTEGER "
7963 "variable", &stat
->where
);
7965 for (p
= code
->ext
.alloc
.list
; p
; p
= p
->next
)
7966 if (p
->expr
->symtree
->n
.sym
->name
== stat
->symtree
->n
.sym
->name
)
7968 gfc_ref
*ref1
, *ref2
;
7971 for (ref1
= p
->expr
->ref
, ref2
= stat
->ref
; ref1
&& ref2
;
7972 ref1
= ref1
->next
, ref2
= ref2
->next
)
7974 if (ref1
->type
!= REF_COMPONENT
|| ref2
->type
!= REF_COMPONENT
)
7976 if (ref1
->u
.c
.component
->name
!= ref2
->u
.c
.component
->name
)
7985 gfc_error ("Stat-variable at %L shall not be %sd within "
7986 "the same %s statement", &stat
->where
, fcn
, fcn
);
7992 /* Check the errmsg variable. */
7996 gfc_warning (0, "ERRMSG at %L is useless without a STAT tag",
7999 gfc_check_vardef_context (errmsg
, false, false, false,
8000 _("ERRMSG variable"));
8002 /* F18:R928 alloc-opt is ERRMSG = errmsg-variable
8003 F18:R930 errmsg-variable is scalar-default-char-variable
8004 F18:R906 default-char-variable is variable
8005 F18:C906 default-char-variable shall be default character. */
8006 if ((errmsg
->ts
.type
!= BT_CHARACTER
8008 && (errmsg
->ref
->type
== REF_ARRAY
8009 || errmsg
->ref
->type
== REF_COMPONENT
)))
8011 || errmsg
->ts
.kind
!= gfc_default_character_kind
)
8012 gfc_error ("ERRMSG variable at %L shall be a scalar default CHARACTER "
8013 "variable", &errmsg
->where
);
8015 for (p
= code
->ext
.alloc
.list
; p
; p
= p
->next
)
8016 if (p
->expr
->symtree
->n
.sym
->name
== errmsg
->symtree
->n
.sym
->name
)
8018 gfc_ref
*ref1
, *ref2
;
8021 for (ref1
= p
->expr
->ref
, ref2
= errmsg
->ref
; ref1
&& ref2
;
8022 ref1
= ref1
->next
, ref2
= ref2
->next
)
8024 if (ref1
->type
!= REF_COMPONENT
|| ref2
->type
!= REF_COMPONENT
)
8026 if (ref1
->u
.c
.component
->name
!= ref2
->u
.c
.component
->name
)
8035 gfc_error ("Errmsg-variable at %L shall not be %sd within "
8036 "the same %s statement", &errmsg
->where
, fcn
, fcn
);
8042 /* Check that an allocate-object appears only once in the statement. */
8044 for (p
= code
->ext
.alloc
.list
; p
; p
= p
->next
)
8047 for (q
= p
->next
; q
; q
= q
->next
)
8050 if (pe
->symtree
->n
.sym
->name
== qe
->symtree
->n
.sym
->name
)
8052 /* This is a potential collision. */
8053 gfc_ref
*pr
= pe
->ref
;
8054 gfc_ref
*qr
= qe
->ref
;
8056 /* Follow the references until
8057 a) They start to differ, in which case there is no error;
8058 you can deallocate a%b and a%c in a single statement
8059 b) Both of them stop, which is an error
8060 c) One of them stops, which is also an error. */
8063 if (pr
== NULL
&& qr
== NULL
)
8065 gfc_error ("Allocate-object at %L also appears at %L",
8066 &pe
->where
, &qe
->where
);
8069 else if (pr
!= NULL
&& qr
== NULL
)
8071 gfc_error ("Allocate-object at %L is subobject of"
8072 " object at %L", &pe
->where
, &qe
->where
);
8075 else if (pr
== NULL
&& qr
!= NULL
)
8077 gfc_error ("Allocate-object at %L is subobject of"
8078 " object at %L", &qe
->where
, &pe
->where
);
8081 /* Here, pr != NULL && qr != NULL */
8082 gcc_assert(pr
->type
== qr
->type
);
8083 if (pr
->type
== REF_ARRAY
)
8085 /* Handle cases like allocate(v(3)%x(3), v(2)%x(3)),
8087 gcc_assert (qr
->type
== REF_ARRAY
);
8089 if (pr
->next
&& qr
->next
)
8092 gfc_array_ref
*par
= &(pr
->u
.ar
);
8093 gfc_array_ref
*qar
= &(qr
->u
.ar
);
8095 for (i
=0; i
<par
->dimen
; i
++)
8097 if ((par
->start
[i
] != NULL
8098 || qar
->start
[i
] != NULL
)
8099 && gfc_dep_compare_expr (par
->start
[i
],
8100 qar
->start
[i
]) != 0)
8107 if (pr
->u
.c
.component
->name
!= qr
->u
.c
.component
->name
)
8120 if (strcmp (fcn
, "ALLOCATE") == 0)
8122 bool arr_alloc_wo_spec
= false;
8124 /* Resolving the expr3 in the loop over all objects to allocate would
8125 execute loop invariant code for each loop item. Therefore do it just
8127 if (code
->expr3
&& code
->expr3
->mold
8128 && code
->expr3
->ts
.type
== BT_DERIVED
)
8130 /* Default initialization via MOLD (non-polymorphic). */
8131 gfc_expr
*rhs
= gfc_default_initializer (&code
->expr3
->ts
);
8134 gfc_resolve_expr (rhs
);
8135 gfc_free_expr (code
->expr3
);
8139 for (a
= code
->ext
.alloc
.list
; a
; a
= a
->next
)
8140 resolve_allocate_expr (a
->expr
, code
, &arr_alloc_wo_spec
);
8142 if (arr_alloc_wo_spec
&& code
->expr3
)
8144 /* Mark the allocate to have to take the array specification
8146 code
->ext
.alloc
.arr_spec_from_expr3
= 1;
8151 for (a
= code
->ext
.alloc
.list
; a
; a
= a
->next
)
8152 resolve_deallocate_expr (a
->expr
);
8157 /************ SELECT CASE resolution subroutines ************/
8159 /* Callback function for our mergesort variant. Determines interval
8160 overlaps for CASEs. Return <0 if op1 < op2, 0 for overlap, >0 for
8161 op1 > op2. Assumes we're not dealing with the default case.
8162 We have op1 = (:L), (K:L) or (K:) and op2 = (:N), (M:N) or (M:).
8163 There are nine situations to check. */
8166 compare_cases (const gfc_case
*op1
, const gfc_case
*op2
)
8170 if (op1
->low
== NULL
) /* op1 = (:L) */
8172 /* op2 = (:N), so overlap. */
8174 /* op2 = (M:) or (M:N), L < M */
8175 if (op2
->low
!= NULL
8176 && gfc_compare_expr (op1
->high
, op2
->low
, INTRINSIC_LT
) < 0)
8179 else if (op1
->high
== NULL
) /* op1 = (K:) */
8181 /* op2 = (M:), so overlap. */
8183 /* op2 = (:N) or (M:N), K > N */
8184 if (op2
->high
!= NULL
8185 && gfc_compare_expr (op1
->low
, op2
->high
, INTRINSIC_GT
) > 0)
8188 else /* op1 = (K:L) */
8190 if (op2
->low
== NULL
) /* op2 = (:N), K > N */
8191 retval
= (gfc_compare_expr (op1
->low
, op2
->high
, INTRINSIC_GT
) > 0)
8193 else if (op2
->high
== NULL
) /* op2 = (M:), L < M */
8194 retval
= (gfc_compare_expr (op1
->high
, op2
->low
, INTRINSIC_LT
) < 0)
8196 else /* op2 = (M:N) */
8200 if (gfc_compare_expr (op1
->high
, op2
->low
, INTRINSIC_LT
) < 0)
8203 else if (gfc_compare_expr (op1
->low
, op2
->high
, INTRINSIC_GT
) > 0)
8212 /* Merge-sort a double linked case list, detecting overlap in the
8213 process. LIST is the head of the double linked case list before it
8214 is sorted. Returns the head of the sorted list if we don't see any
8215 overlap, or NULL otherwise. */
8218 check_case_overlap (gfc_case
*list
)
8220 gfc_case
*p
, *q
, *e
, *tail
;
8221 int insize
, nmerges
, psize
, qsize
, cmp
, overlap_seen
;
8223 /* If the passed list was empty, return immediately. */
8230 /* Loop unconditionally. The only exit from this loop is a return
8231 statement, when we've finished sorting the case list. */
8238 /* Count the number of merges we do in this pass. */
8241 /* Loop while there exists a merge to be done. */
8246 /* Count this merge. */
8249 /* Cut the list in two pieces by stepping INSIZE places
8250 forward in the list, starting from P. */
8253 for (i
= 0; i
< insize
; i
++)
8262 /* Now we have two lists. Merge them! */
8263 while (psize
> 0 || (qsize
> 0 && q
!= NULL
))
8265 /* See from which the next case to merge comes from. */
8268 /* P is empty so the next case must come from Q. */
8273 else if (qsize
== 0 || q
== NULL
)
8282 cmp
= compare_cases (p
, q
);
8285 /* The whole case range for P is less than the
8293 /* The whole case range for Q is greater than
8294 the case range for P. */
8301 /* The cases overlap, or they are the same
8302 element in the list. Either way, we must
8303 issue an error and get the next case from P. */
8304 /* FIXME: Sort P and Q by line number. */
8305 gfc_error ("CASE label at %L overlaps with CASE "
8306 "label at %L", &p
->where
, &q
->where
);
8314 /* Add the next element to the merged list. */
8323 /* P has now stepped INSIZE places along, and so has Q. So
8324 they're the same. */
8329 /* If we have done only one merge or none at all, we've
8330 finished sorting the cases. */
8339 /* Otherwise repeat, merging lists twice the size. */
8345 /* Check to see if an expression is suitable for use in a CASE statement.
8346 Makes sure that all case expressions are scalar constants of the same
8347 type. Return false if anything is wrong. */
8350 validate_case_label_expr (gfc_expr
*e
, gfc_expr
*case_expr
)
8352 if (e
== NULL
) return true;
8354 if (e
->ts
.type
!= case_expr
->ts
.type
)
8356 gfc_error ("Expression in CASE statement at %L must be of type %s",
8357 &e
->where
, gfc_basic_typename (case_expr
->ts
.type
));
8361 /* C805 (R808) For a given case-construct, each case-value shall be of
8362 the same type as case-expr. For character type, length differences
8363 are allowed, but the kind type parameters shall be the same. */
8365 if (case_expr
->ts
.type
== BT_CHARACTER
&& e
->ts
.kind
!= case_expr
->ts
.kind
)
8367 gfc_error ("Expression in CASE statement at %L must be of kind %d",
8368 &e
->where
, case_expr
->ts
.kind
);
8372 /* Convert the case value kind to that of case expression kind,
8375 if (e
->ts
.kind
!= case_expr
->ts
.kind
)
8376 gfc_convert_type_warn (e
, &case_expr
->ts
, 2, 0);
8380 gfc_error ("Expression in CASE statement at %L must be scalar",
8389 /* Given a completely parsed select statement, we:
8391 - Validate all expressions and code within the SELECT.
8392 - Make sure that the selection expression is not of the wrong type.
8393 - Make sure that no case ranges overlap.
8394 - Eliminate unreachable cases and unreachable code resulting from
8395 removing case labels.
8397 The standard does allow unreachable cases, e.g. CASE (5:3). But
8398 they are a hassle for code generation, and to prevent that, we just
8399 cut them out here. This is not necessary for overlapping cases
8400 because they are illegal and we never even try to generate code.
8402 We have the additional caveat that a SELECT construct could have
8403 been a computed GOTO in the source code. Fortunately we can fairly
8404 easily work around that here: The case_expr for a "real" SELECT CASE
8405 is in code->expr1, but for a computed GOTO it is in code->expr2. All
8406 we have to do is make sure that the case_expr is a scalar integer
8410 resolve_select (gfc_code
*code
, bool select_type
)
8413 gfc_expr
*case_expr
;
8414 gfc_case
*cp
, *default_case
, *tail
, *head
;
8415 int seen_unreachable
;
8421 if (code
->expr1
== NULL
)
8423 /* This was actually a computed GOTO statement. */
8424 case_expr
= code
->expr2
;
8425 if (case_expr
->ts
.type
!= BT_INTEGER
|| case_expr
->rank
!= 0)
8426 gfc_error ("Selection expression in computed GOTO statement "
8427 "at %L must be a scalar integer expression",
8430 /* Further checking is not necessary because this SELECT was built
8431 by the compiler, so it should always be OK. Just move the
8432 case_expr from expr2 to expr so that we can handle computed
8433 GOTOs as normal SELECTs from here on. */
8434 code
->expr1
= code
->expr2
;
8439 case_expr
= code
->expr1
;
8440 type
= case_expr
->ts
.type
;
8443 if (type
!= BT_LOGICAL
&& type
!= BT_INTEGER
&& type
!= BT_CHARACTER
)
8445 gfc_error ("Argument of SELECT statement at %L cannot be %s",
8446 &case_expr
->where
, gfc_typename (&case_expr
->ts
));
8448 /* Punt. Going on here just produce more garbage error messages. */
8453 if (!select_type
&& case_expr
->rank
!= 0)
8455 gfc_error ("Argument of SELECT statement at %L must be a scalar "
8456 "expression", &case_expr
->where
);
8462 /* Raise a warning if an INTEGER case value exceeds the range of
8463 the case-expr. Later, all expressions will be promoted to the
8464 largest kind of all case-labels. */
8466 if (type
== BT_INTEGER
)
8467 for (body
= code
->block
; body
; body
= body
->block
)
8468 for (cp
= body
->ext
.block
.case_list
; cp
; cp
= cp
->next
)
8471 && gfc_check_integer_range (cp
->low
->value
.integer
,
8472 case_expr
->ts
.kind
) != ARITH_OK
)
8473 gfc_warning (0, "Expression in CASE statement at %L is "
8474 "not in the range of %s", &cp
->low
->where
,
8475 gfc_typename (&case_expr
->ts
));
8478 && cp
->low
!= cp
->high
8479 && gfc_check_integer_range (cp
->high
->value
.integer
,
8480 case_expr
->ts
.kind
) != ARITH_OK
)
8481 gfc_warning (0, "Expression in CASE statement at %L is "
8482 "not in the range of %s", &cp
->high
->where
,
8483 gfc_typename (&case_expr
->ts
));
8486 /* PR 19168 has a long discussion concerning a mismatch of the kinds
8487 of the SELECT CASE expression and its CASE values. Walk the lists
8488 of case values, and if we find a mismatch, promote case_expr to
8489 the appropriate kind. */
8491 if (type
== BT_LOGICAL
|| type
== BT_INTEGER
)
8493 for (body
= code
->block
; body
; body
= body
->block
)
8495 /* Walk the case label list. */
8496 for (cp
= body
->ext
.block
.case_list
; cp
; cp
= cp
->next
)
8498 /* Intercept the DEFAULT case. It does not have a kind. */
8499 if (cp
->low
== NULL
&& cp
->high
== NULL
)
8502 /* Unreachable case ranges are discarded, so ignore. */
8503 if (cp
->low
!= NULL
&& cp
->high
!= NULL
8504 && cp
->low
!= cp
->high
8505 && gfc_compare_expr (cp
->low
, cp
->high
, INTRINSIC_GT
) > 0)
8509 && case_expr
->ts
.kind
!= gfc_kind_max(case_expr
, cp
->low
))
8510 gfc_convert_type_warn (case_expr
, &cp
->low
->ts
, 2, 0);
8512 if (cp
->high
!= NULL
8513 && case_expr
->ts
.kind
!= gfc_kind_max(case_expr
, cp
->high
))
8514 gfc_convert_type_warn (case_expr
, &cp
->high
->ts
, 2, 0);
8519 /* Assume there is no DEFAULT case. */
8520 default_case
= NULL
;
8525 for (body
= code
->block
; body
; body
= body
->block
)
8527 /* Assume the CASE list is OK, and all CASE labels can be matched. */
8529 seen_unreachable
= 0;
8531 /* Walk the case label list, making sure that all case labels
8533 for (cp
= body
->ext
.block
.case_list
; cp
; cp
= cp
->next
)
8535 /* Count the number of cases in the whole construct. */
8538 /* Intercept the DEFAULT case. */
8539 if (cp
->low
== NULL
&& cp
->high
== NULL
)
8541 if (default_case
!= NULL
)
8543 gfc_error ("The DEFAULT CASE at %L cannot be followed "
8544 "by a second DEFAULT CASE at %L",
8545 &default_case
->where
, &cp
->where
);
8556 /* Deal with single value cases and case ranges. Errors are
8557 issued from the validation function. */
8558 if (!validate_case_label_expr (cp
->low
, case_expr
)
8559 || !validate_case_label_expr (cp
->high
, case_expr
))
8565 if (type
== BT_LOGICAL
8566 && ((cp
->low
== NULL
|| cp
->high
== NULL
)
8567 || cp
->low
!= cp
->high
))
8569 gfc_error ("Logical range in CASE statement at %L is not "
8570 "allowed", &cp
->low
->where
);
8575 if (type
== BT_LOGICAL
&& cp
->low
->expr_type
== EXPR_CONSTANT
)
8578 value
= cp
->low
->value
.logical
== 0 ? 2 : 1;
8579 if (value
& seen_logical
)
8581 gfc_error ("Constant logical value in CASE statement "
8582 "is repeated at %L",
8587 seen_logical
|= value
;
8590 if (cp
->low
!= NULL
&& cp
->high
!= NULL
8591 && cp
->low
!= cp
->high
8592 && gfc_compare_expr (cp
->low
, cp
->high
, INTRINSIC_GT
) > 0)
8594 if (warn_surprising
)
8595 gfc_warning (OPT_Wsurprising
,
8596 "Range specification at %L can never be matched",
8599 cp
->unreachable
= 1;
8600 seen_unreachable
= 1;
8604 /* If the case range can be matched, it can also overlap with
8605 other cases. To make sure it does not, we put it in a
8606 double linked list here. We sort that with a merge sort
8607 later on to detect any overlapping cases. */
8611 head
->right
= head
->left
= NULL
;
8616 tail
->right
->left
= tail
;
8623 /* It there was a failure in the previous case label, give up
8624 for this case label list. Continue with the next block. */
8628 /* See if any case labels that are unreachable have been seen.
8629 If so, we eliminate them. This is a bit of a kludge because
8630 the case lists for a single case statement (label) is a
8631 single forward linked lists. */
8632 if (seen_unreachable
)
8634 /* Advance until the first case in the list is reachable. */
8635 while (body
->ext
.block
.case_list
!= NULL
8636 && body
->ext
.block
.case_list
->unreachable
)
8638 gfc_case
*n
= body
->ext
.block
.case_list
;
8639 body
->ext
.block
.case_list
= body
->ext
.block
.case_list
->next
;
8641 gfc_free_case_list (n
);
8644 /* Strip all other unreachable cases. */
8645 if (body
->ext
.block
.case_list
)
8647 for (cp
= body
->ext
.block
.case_list
; cp
&& cp
->next
; cp
= cp
->next
)
8649 if (cp
->next
->unreachable
)
8651 gfc_case
*n
= cp
->next
;
8652 cp
->next
= cp
->next
->next
;
8654 gfc_free_case_list (n
);
8661 /* See if there were overlapping cases. If the check returns NULL,
8662 there was overlap. In that case we don't do anything. If head
8663 is non-NULL, we prepend the DEFAULT case. The sorted list can
8664 then used during code generation for SELECT CASE constructs with
8665 a case expression of a CHARACTER type. */
8668 head
= check_case_overlap (head
);
8670 /* Prepend the default_case if it is there. */
8671 if (head
!= NULL
&& default_case
)
8673 default_case
->left
= NULL
;
8674 default_case
->right
= head
;
8675 head
->left
= default_case
;
8679 /* Eliminate dead blocks that may be the result if we've seen
8680 unreachable case labels for a block. */
8681 for (body
= code
; body
&& body
->block
; body
= body
->block
)
8683 if (body
->block
->ext
.block
.case_list
== NULL
)
8685 /* Cut the unreachable block from the code chain. */
8686 gfc_code
*c
= body
->block
;
8687 body
->block
= c
->block
;
8689 /* Kill the dead block, but not the blocks below it. */
8691 gfc_free_statements (c
);
8695 /* More than two cases is legal but insane for logical selects.
8696 Issue a warning for it. */
8697 if (warn_surprising
&& type
== BT_LOGICAL
&& ncases
> 2)
8698 gfc_warning (OPT_Wsurprising
,
8699 "Logical SELECT CASE block at %L has more that two cases",
8704 /* Check if a derived type is extensible. */
8707 gfc_type_is_extensible (gfc_symbol
*sym
)
8709 return !(sym
->attr
.is_bind_c
|| sym
->attr
.sequence
8710 || (sym
->attr
.is_class
8711 && sym
->components
->ts
.u
.derived
->attr
.unlimited_polymorphic
));
8716 resolve_types (gfc_namespace
*ns
);
8718 /* Resolve an associate-name: Resolve target and ensure the type-spec is
8719 correct as well as possibly the array-spec. */
8722 resolve_assoc_var (gfc_symbol
* sym
, bool resolve_target
)
8726 gcc_assert (sym
->assoc
);
8727 gcc_assert (sym
->attr
.flavor
== FL_VARIABLE
);
8729 /* If this is for SELECT TYPE, the target may not yet be set. In that
8730 case, return. Resolution will be called later manually again when
8732 target
= sym
->assoc
->target
;
8735 gcc_assert (!sym
->assoc
->dangling
);
8737 if (resolve_target
&& !gfc_resolve_expr (target
))
8740 /* For variable targets, we get some attributes from the target. */
8741 if (target
->expr_type
== EXPR_VARIABLE
)
8745 gcc_assert (target
->symtree
);
8746 tsym
= target
->symtree
->n
.sym
;
8748 sym
->attr
.asynchronous
= tsym
->attr
.asynchronous
;
8749 sym
->attr
.volatile_
= tsym
->attr
.volatile_
;
8751 sym
->attr
.target
= tsym
->attr
.target
8752 || gfc_expr_attr (target
).pointer
;
8753 if (is_subref_array (target
))
8754 sym
->attr
.subref_array_pointer
= 1;
8757 if (target
->expr_type
== EXPR_NULL
)
8759 gfc_error ("Selector at %L cannot be NULL()", &target
->where
);
8762 else if (target
->ts
.type
== BT_UNKNOWN
)
8764 gfc_error ("Selector at %L has no type", &target
->where
);
8768 /* Get type if this was not already set. Note that it can be
8769 some other type than the target in case this is a SELECT TYPE
8770 selector! So we must not update when the type is already there. */
8771 if (sym
->ts
.type
== BT_UNKNOWN
)
8772 sym
->ts
= target
->ts
;
8774 gcc_assert (sym
->ts
.type
!= BT_UNKNOWN
);
8776 /* See if this is a valid association-to-variable. */
8777 sym
->assoc
->variable
= (target
->expr_type
== EXPR_VARIABLE
8778 && !gfc_has_vector_subscript (target
));
8780 /* Finally resolve if this is an array or not. */
8781 if (sym
->attr
.dimension
&& target
->rank
== 0)
8783 /* primary.c makes the assumption that a reference to an associate
8784 name followed by a left parenthesis is an array reference. */
8785 if (sym
->ts
.type
!= BT_CHARACTER
)
8786 gfc_error ("Associate-name %qs at %L is used as array",
8787 sym
->name
, &sym
->declared_at
);
8788 sym
->attr
.dimension
= 0;
8793 /* We cannot deal with class selectors that need temporaries. */
8794 if (target
->ts
.type
== BT_CLASS
8795 && gfc_ref_needs_temporary_p (target
->ref
))
8797 gfc_error ("CLASS selector at %L needs a temporary which is not "
8798 "yet implemented", &target
->where
);
8802 if (target
->ts
.type
== BT_CLASS
)
8803 gfc_fix_class_refs (target
);
8805 if (target
->rank
!= 0)
8808 /* The rank may be incorrectly guessed at parsing, therefore make sure
8809 it is corrected now. */
8810 if (sym
->ts
.type
!= BT_CLASS
&& (!sym
->as
|| sym
->assoc
->rankguessed
))
8813 sym
->as
= gfc_get_array_spec ();
8815 as
->rank
= target
->rank
;
8816 as
->type
= AS_DEFERRED
;
8817 as
->corank
= gfc_get_corank (target
);
8818 sym
->attr
.dimension
= 1;
8819 if (as
->corank
!= 0)
8820 sym
->attr
.codimension
= 1;
8822 else if (sym
->ts
.type
== BT_CLASS
&& (!CLASS_DATA (sym
)->as
|| sym
->assoc
->rankguessed
))
8824 if (!CLASS_DATA (sym
)->as
)
8825 CLASS_DATA (sym
)->as
= gfc_get_array_spec ();
8826 as
= CLASS_DATA (sym
)->as
;
8827 as
->rank
= target
->rank
;
8828 as
->type
= AS_DEFERRED
;
8829 as
->corank
= gfc_get_corank (target
);
8830 CLASS_DATA (sym
)->attr
.dimension
= 1;
8831 if (as
->corank
!= 0)
8832 CLASS_DATA (sym
)->attr
.codimension
= 1;
8837 /* target's rank is 0, but the type of the sym is still array valued,
8838 which has to be corrected. */
8839 if (sym
->ts
.type
== BT_CLASS
8840 && CLASS_DATA (sym
) && CLASS_DATA (sym
)->as
)
8843 symbol_attribute attr
;
8844 /* The associated variable's type is still the array type
8845 correct this now. */
8846 gfc_typespec
*ts
= &target
->ts
;
8849 for (ref
= target
->ref
; ref
!= NULL
; ref
= ref
->next
)
8854 ts
= &ref
->u
.c
.component
->ts
;
8857 if (ts
->type
== BT_CLASS
)
8858 ts
= &ts
->u
.derived
->components
->ts
;
8864 /* Create a scalar instance of the current class type. Because the
8865 rank of a class array goes into its name, the type has to be
8866 rebuild. The alternative of (re-)setting just the attributes
8867 and as in the current type, destroys the type also in other
8871 sym
->ts
.type
= BT_CLASS
;
8872 attr
= CLASS_DATA (sym
)->attr
;
8874 attr
.associate_var
= 1;
8875 attr
.dimension
= attr
.codimension
= 0;
8876 attr
.class_pointer
= 1;
8877 if (!gfc_build_class_symbol (&sym
->ts
, &attr
, &as
))
8879 /* Make sure the _vptr is set. */
8880 c
= gfc_find_component (sym
->ts
.u
.derived
, "_vptr", true, true, NULL
);
8881 if (c
->ts
.u
.derived
== NULL
)
8882 c
->ts
.u
.derived
= gfc_find_derived_vtab (sym
->ts
.u
.derived
);
8883 CLASS_DATA (sym
)->attr
.pointer
= 1;
8884 CLASS_DATA (sym
)->attr
.class_pointer
= 1;
8885 gfc_set_sym_referenced (sym
->ts
.u
.derived
);
8886 gfc_commit_symbol (sym
->ts
.u
.derived
);
8887 /* _vptr now has the _vtab in it, change it to the _vtype. */
8888 if (c
->ts
.u
.derived
->attr
.vtab
)
8889 c
->ts
.u
.derived
= c
->ts
.u
.derived
->ts
.u
.derived
;
8890 c
->ts
.u
.derived
->ns
->types_resolved
= 0;
8891 resolve_types (c
->ts
.u
.derived
->ns
);
8895 /* Mark this as an associate variable. */
8896 sym
->attr
.associate_var
= 1;
8898 /* Fix up the type-spec for CHARACTER types. */
8899 if (sym
->ts
.type
== BT_CHARACTER
&& !sym
->attr
.select_type_temporary
)
8902 sym
->ts
.u
.cl
= target
->ts
.u
.cl
;
8904 if (sym
->ts
.deferred
&& target
->expr_type
== EXPR_VARIABLE
8905 && target
->symtree
->n
.sym
->attr
.dummy
8906 && sym
->ts
.u
.cl
== target
->ts
.u
.cl
)
8908 sym
->ts
.u
.cl
= gfc_new_charlen (sym
->ns
, NULL
);
8909 sym
->ts
.deferred
= 1;
8912 if (!sym
->ts
.u
.cl
->length
8913 && !sym
->ts
.deferred
8914 && target
->expr_type
== EXPR_CONSTANT
)
8916 sym
->ts
.u
.cl
->length
=
8917 gfc_get_int_expr (gfc_charlen_int_kind
, NULL
,
8918 target
->value
.character
.length
);
8920 else if ((!sym
->ts
.u
.cl
->length
8921 || sym
->ts
.u
.cl
->length
->expr_type
!= EXPR_CONSTANT
)
8922 && target
->expr_type
!= EXPR_VARIABLE
)
8924 sym
->ts
.u
.cl
= gfc_new_charlen (sym
->ns
, NULL
);
8925 sym
->ts
.deferred
= 1;
8927 /* This is reset in trans-stmt.c after the assignment
8928 of the target expression to the associate name. */
8929 sym
->attr
.allocatable
= 1;
8933 /* If the target is a good class object, so is the associate variable. */
8934 if (sym
->ts
.type
== BT_CLASS
&& gfc_expr_attr (target
).class_ok
)
8935 sym
->attr
.class_ok
= 1;
8939 /* Ensure that SELECT TYPE expressions have the correct rank and a full
8940 array reference, where necessary. The symbols are artificial and so
8941 the dimension attribute and arrayspec can also be set. In addition,
8942 sometimes the expr1 arrives as BT_DERIVED, when the symbol is BT_CLASS.
8943 This is corrected here as well.*/
8946 fixup_array_ref (gfc_expr
**expr1
, gfc_expr
*expr2
,
8947 int rank
, gfc_ref
*ref
)
8949 gfc_ref
*nref
= (*expr1
)->ref
;
8950 gfc_symbol
*sym1
= (*expr1
)->symtree
->n
.sym
;
8951 gfc_symbol
*sym2
= expr2
? expr2
->symtree
->n
.sym
: NULL
;
8952 (*expr1
)->rank
= rank
;
8953 if (sym1
->ts
.type
== BT_CLASS
)
8955 if ((*expr1
)->ts
.type
!= BT_CLASS
)
8956 (*expr1
)->ts
= sym1
->ts
;
8958 CLASS_DATA (sym1
)->attr
.dimension
= 1;
8959 if (CLASS_DATA (sym1
)->as
== NULL
&& sym2
)
8960 CLASS_DATA (sym1
)->as
8961 = gfc_copy_array_spec (CLASS_DATA (sym2
)->as
);
8965 sym1
->attr
.dimension
= 1;
8966 if (sym1
->as
== NULL
&& sym2
)
8967 sym1
->as
= gfc_copy_array_spec (sym2
->as
);
8970 for (; nref
; nref
= nref
->next
)
8971 if (nref
->next
== NULL
)
8974 if (ref
&& nref
&& nref
->type
!= REF_ARRAY
)
8975 nref
->next
= gfc_copy_ref (ref
);
8976 else if (ref
&& !nref
)
8977 (*expr1
)->ref
= gfc_copy_ref (ref
);
8982 build_loc_call (gfc_expr
*sym_expr
)
8985 loc_call
= gfc_get_expr ();
8986 loc_call
->expr_type
= EXPR_FUNCTION
;
8987 gfc_get_sym_tree ("_loc", gfc_current_ns
, &loc_call
->symtree
, false);
8988 loc_call
->symtree
->n
.sym
->attr
.flavor
= FL_PROCEDURE
;
8989 loc_call
->symtree
->n
.sym
->attr
.intrinsic
= 1;
8990 loc_call
->symtree
->n
.sym
->result
= loc_call
->symtree
->n
.sym
;
8991 gfc_commit_symbol (loc_call
->symtree
->n
.sym
);
8992 loc_call
->ts
.type
= BT_INTEGER
;
8993 loc_call
->ts
.kind
= gfc_index_integer_kind
;
8994 loc_call
->value
.function
.isym
= gfc_intrinsic_function_by_id (GFC_ISYM_LOC
);
8995 loc_call
->value
.function
.actual
= gfc_get_actual_arglist ();
8996 loc_call
->value
.function
.actual
->expr
= sym_expr
;
8997 loc_call
->where
= sym_expr
->where
;
9001 /* Resolve a SELECT TYPE statement. */
9004 resolve_select_type (gfc_code
*code
, gfc_namespace
*old_ns
)
9006 gfc_symbol
*selector_type
;
9007 gfc_code
*body
, *new_st
, *if_st
, *tail
;
9008 gfc_code
*class_is
= NULL
, *default_case
= NULL
;
9011 char name
[GFC_MAX_SYMBOL_LEN
];
9015 gfc_ref
* ref
= NULL
;
9016 gfc_expr
*selector_expr
= NULL
;
9018 ns
= code
->ext
.block
.ns
;
9021 /* Check for F03:C813. */
9022 if (code
->expr1
->ts
.type
!= BT_CLASS
9023 && !(code
->expr2
&& code
->expr2
->ts
.type
== BT_CLASS
))
9025 gfc_error ("Selector shall be polymorphic in SELECT TYPE statement "
9026 "at %L", &code
->loc
);
9030 if (!code
->expr1
->symtree
->n
.sym
->attr
.class_ok
)
9035 gfc_ref
*ref2
= NULL
;
9036 for (ref
= code
->expr2
->ref
; ref
!= NULL
; ref
= ref
->next
)
9037 if (ref
->type
== REF_COMPONENT
9038 && ref
->u
.c
.component
->ts
.type
== BT_CLASS
)
9043 if (code
->expr1
->symtree
->n
.sym
->attr
.untyped
)
9044 code
->expr1
->symtree
->n
.sym
->ts
= ref2
->u
.c
.component
->ts
;
9045 selector_type
= CLASS_DATA (ref2
->u
.c
.component
)->ts
.u
.derived
;
9049 if (code
->expr1
->symtree
->n
.sym
->attr
.untyped
)
9050 code
->expr1
->symtree
->n
.sym
->ts
= code
->expr2
->ts
;
9051 selector_type
= CLASS_DATA (code
->expr2
)->ts
.u
.derived
;
9054 if (code
->expr2
->rank
&& CLASS_DATA (code
->expr1
)->as
)
9055 CLASS_DATA (code
->expr1
)->as
->rank
= code
->expr2
->rank
;
9057 /* F2008: C803 The selector expression must not be coindexed. */
9058 if (gfc_is_coindexed (code
->expr2
))
9060 gfc_error ("Selector at %L must not be coindexed",
9061 &code
->expr2
->where
);
9068 selector_type
= CLASS_DATA (code
->expr1
)->ts
.u
.derived
;
9070 if (gfc_is_coindexed (code
->expr1
))
9072 gfc_error ("Selector at %L must not be coindexed",
9073 &code
->expr1
->where
);
9078 /* Loop over TYPE IS / CLASS IS cases. */
9079 for (body
= code
->block
; body
; body
= body
->block
)
9081 c
= body
->ext
.block
.case_list
;
9085 /* Check for repeated cases. */
9086 for (tail
= code
->block
; tail
; tail
= tail
->block
)
9088 gfc_case
*d
= tail
->ext
.block
.case_list
;
9092 if (c
->ts
.type
== d
->ts
.type
9093 && ((c
->ts
.type
== BT_DERIVED
9094 && c
->ts
.u
.derived
&& d
->ts
.u
.derived
9095 && !strcmp (c
->ts
.u
.derived
->name
,
9096 d
->ts
.u
.derived
->name
))
9097 || c
->ts
.type
== BT_UNKNOWN
9098 || (!(c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
9099 && c
->ts
.kind
== d
->ts
.kind
)))
9101 gfc_error ("TYPE IS at %L overlaps with TYPE IS at %L",
9102 &c
->where
, &d
->where
);
9108 /* Check F03:C815. */
9109 if ((c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
9110 && !selector_type
->attr
.unlimited_polymorphic
9111 && !gfc_type_is_extensible (c
->ts
.u
.derived
))
9113 gfc_error ("Derived type %qs at %L must be extensible",
9114 c
->ts
.u
.derived
->name
, &c
->where
);
9119 /* Check F03:C816. */
9120 if (c
->ts
.type
!= BT_UNKNOWN
&& !selector_type
->attr
.unlimited_polymorphic
9121 && ((c
->ts
.type
!= BT_DERIVED
&& c
->ts
.type
!= BT_CLASS
)
9122 || !gfc_type_is_extension_of (selector_type
, c
->ts
.u
.derived
)))
9124 if (c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
9125 gfc_error ("Derived type %qs at %L must be an extension of %qs",
9126 c
->ts
.u
.derived
->name
, &c
->where
, selector_type
->name
);
9128 gfc_error ("Unexpected intrinsic type %qs at %L",
9129 gfc_basic_typename (c
->ts
.type
), &c
->where
);
9134 /* Check F03:C814. */
9135 if (c
->ts
.type
== BT_CHARACTER
9136 && (c
->ts
.u
.cl
->length
!= NULL
|| c
->ts
.deferred
))
9138 gfc_error ("The type-spec at %L shall specify that each length "
9139 "type parameter is assumed", &c
->where
);
9144 /* Intercept the DEFAULT case. */
9145 if (c
->ts
.type
== BT_UNKNOWN
)
9147 /* Check F03:C818. */
9150 gfc_error ("The DEFAULT CASE at %L cannot be followed "
9151 "by a second DEFAULT CASE at %L",
9152 &default_case
->ext
.block
.case_list
->where
, &c
->where
);
9157 default_case
= body
;
9164 /* Transform SELECT TYPE statement to BLOCK and associate selector to
9165 target if present. If there are any EXIT statements referring to the
9166 SELECT TYPE construct, this is no problem because the gfc_code
9167 reference stays the same and EXIT is equally possible from the BLOCK
9168 it is changed to. */
9169 code
->op
= EXEC_BLOCK
;
9172 gfc_association_list
* assoc
;
9174 assoc
= gfc_get_association_list ();
9175 assoc
->st
= code
->expr1
->symtree
;
9176 assoc
->target
= gfc_copy_expr (code
->expr2
);
9177 assoc
->target
->where
= code
->expr2
->where
;
9178 /* assoc->variable will be set by resolve_assoc_var. */
9180 code
->ext
.block
.assoc
= assoc
;
9181 code
->expr1
->symtree
->n
.sym
->assoc
= assoc
;
9183 resolve_assoc_var (code
->expr1
->symtree
->n
.sym
, false);
9186 code
->ext
.block
.assoc
= NULL
;
9188 /* Ensure that the selector rank and arrayspec are available to
9189 correct expressions in which they might be missing. */
9190 if (code
->expr2
&& code
->expr2
->rank
)
9192 rank
= code
->expr2
->rank
;
9193 for (ref
= code
->expr2
->ref
; ref
; ref
= ref
->next
)
9194 if (ref
->next
== NULL
)
9196 if (ref
&& ref
->type
== REF_ARRAY
)
9197 ref
= gfc_copy_ref (ref
);
9199 /* Fixup expr1 if necessary. */
9201 fixup_array_ref (&code
->expr1
, code
->expr2
, rank
, ref
);
9203 else if (code
->expr1
->rank
)
9205 rank
= code
->expr1
->rank
;
9206 for (ref
= code
->expr1
->ref
; ref
; ref
= ref
->next
)
9207 if (ref
->next
== NULL
)
9209 if (ref
&& ref
->type
== REF_ARRAY
)
9210 ref
= gfc_copy_ref (ref
);
9213 /* Add EXEC_SELECT to switch on type. */
9214 new_st
= gfc_get_code (code
->op
);
9215 new_st
->expr1
= code
->expr1
;
9216 new_st
->expr2
= code
->expr2
;
9217 new_st
->block
= code
->block
;
9218 code
->expr1
= code
->expr2
= NULL
;
9223 ns
->code
->next
= new_st
;
9225 code
->op
= EXEC_SELECT_TYPE
;
9227 /* Use the intrinsic LOC function to generate an integer expression
9228 for the vtable of the selector. Note that the rank of the selector
9229 expression has to be set to zero. */
9230 gfc_add_vptr_component (code
->expr1
);
9231 code
->expr1
->rank
= 0;
9232 code
->expr1
= build_loc_call (code
->expr1
);
9233 selector_expr
= code
->expr1
->value
.function
.actual
->expr
;
9235 /* Loop over TYPE IS / CLASS IS cases. */
9236 for (body
= code
->block
; body
; body
= body
->block
)
9240 c
= body
->ext
.block
.case_list
;
9242 /* Generate an index integer expression for address of the
9243 TYPE/CLASS vtable and store it in c->low. The hash expression
9244 is stored in c->high and is used to resolve intrinsic cases. */
9245 if (c
->ts
.type
!= BT_UNKNOWN
)
9247 if (c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
9249 vtab
= gfc_find_derived_vtab (c
->ts
.u
.derived
);
9251 c
->high
= gfc_get_int_expr (gfc_integer_4_kind
, NULL
,
9252 c
->ts
.u
.derived
->hash_value
);
9256 vtab
= gfc_find_vtab (&c
->ts
);
9257 gcc_assert (vtab
&& CLASS_DATA (vtab
)->initializer
);
9258 e
= CLASS_DATA (vtab
)->initializer
;
9259 c
->high
= gfc_copy_expr (e
);
9260 if (c
->high
->ts
.kind
!= gfc_integer_4_kind
)
9263 ts
.kind
= gfc_integer_4_kind
;
9264 ts
.type
= BT_INTEGER
;
9265 gfc_convert_type_warn (c
->high
, &ts
, 2, 0);
9269 e
= gfc_lval_expr_from_sym (vtab
);
9270 c
->low
= build_loc_call (e
);
9275 /* Associate temporary to selector. This should only be done
9276 when this case is actually true, so build a new ASSOCIATE
9277 that does precisely this here (instead of using the
9280 if (c
->ts
.type
== BT_CLASS
)
9281 sprintf (name
, "__tmp_class_%s", c
->ts
.u
.derived
->name
);
9282 else if (c
->ts
.type
== BT_DERIVED
)
9283 sprintf (name
, "__tmp_type_%s", c
->ts
.u
.derived
->name
);
9284 else if (c
->ts
.type
== BT_CHARACTER
)
9286 HOST_WIDE_INT charlen
= 0;
9287 if (c
->ts
.u
.cl
&& c
->ts
.u
.cl
->length
9288 && c
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
)
9289 charlen
= gfc_mpz_get_hwi (c
->ts
.u
.cl
->length
->value
.integer
);
9290 snprintf (name
, sizeof (name
),
9291 "__tmp_%s_" HOST_WIDE_INT_PRINT_DEC
"_%d",
9292 gfc_basic_typename (c
->ts
.type
), charlen
, c
->ts
.kind
);
9295 sprintf (name
, "__tmp_%s_%d", gfc_basic_typename (c
->ts
.type
),
9298 st
= gfc_find_symtree (ns
->sym_root
, name
);
9299 gcc_assert (st
->n
.sym
->assoc
);
9300 st
->n
.sym
->assoc
->target
= gfc_get_variable_expr (selector_expr
->symtree
);
9301 st
->n
.sym
->assoc
->target
->where
= selector_expr
->where
;
9302 if (c
->ts
.type
!= BT_CLASS
&& c
->ts
.type
!= BT_UNKNOWN
)
9304 gfc_add_data_component (st
->n
.sym
->assoc
->target
);
9305 /* Fixup the target expression if necessary. */
9307 fixup_array_ref (&st
->n
.sym
->assoc
->target
, NULL
, rank
, ref
);
9310 new_st
= gfc_get_code (EXEC_BLOCK
);
9311 new_st
->ext
.block
.ns
= gfc_build_block_ns (ns
);
9312 new_st
->ext
.block
.ns
->code
= body
->next
;
9313 body
->next
= new_st
;
9315 /* Chain in the new list only if it is marked as dangling. Otherwise
9316 there is a CASE label overlap and this is already used. Just ignore,
9317 the error is diagnosed elsewhere. */
9318 if (st
->n
.sym
->assoc
->dangling
)
9320 new_st
->ext
.block
.assoc
= st
->n
.sym
->assoc
;
9321 st
->n
.sym
->assoc
->dangling
= 0;
9324 resolve_assoc_var (st
->n
.sym
, false);
9327 /* Take out CLASS IS cases for separate treatment. */
9329 while (body
&& body
->block
)
9331 if (body
->block
->ext
.block
.case_list
->ts
.type
== BT_CLASS
)
9333 /* Add to class_is list. */
9334 if (class_is
== NULL
)
9336 class_is
= body
->block
;
9341 for (tail
= class_is
; tail
->block
; tail
= tail
->block
) ;
9342 tail
->block
= body
->block
;
9345 /* Remove from EXEC_SELECT list. */
9346 body
->block
= body
->block
->block
;
9359 /* Add a default case to hold the CLASS IS cases. */
9360 for (tail
= code
; tail
->block
; tail
= tail
->block
) ;
9361 tail
->block
= gfc_get_code (EXEC_SELECT_TYPE
);
9363 tail
->ext
.block
.case_list
= gfc_get_case ();
9364 tail
->ext
.block
.case_list
->ts
.type
= BT_UNKNOWN
;
9366 default_case
= tail
;
9369 /* More than one CLASS IS block? */
9370 if (class_is
->block
)
9374 /* Sort CLASS IS blocks by extension level. */
9378 for (c1
= &class_is
; (*c1
) && (*c1
)->block
; c1
= &((*c1
)->block
))
9381 /* F03:C817 (check for doubles). */
9382 if ((*c1
)->ext
.block
.case_list
->ts
.u
.derived
->hash_value
9383 == c2
->ext
.block
.case_list
->ts
.u
.derived
->hash_value
)
9385 gfc_error ("Double CLASS IS block in SELECT TYPE "
9387 &c2
->ext
.block
.case_list
->where
);
9390 if ((*c1
)->ext
.block
.case_list
->ts
.u
.derived
->attr
.extension
9391 < c2
->ext
.block
.case_list
->ts
.u
.derived
->attr
.extension
)
9394 (*c1
)->block
= c2
->block
;
9404 /* Generate IF chain. */
9405 if_st
= gfc_get_code (EXEC_IF
);
9407 for (body
= class_is
; body
; body
= body
->block
)
9409 new_st
->block
= gfc_get_code (EXEC_IF
);
9410 new_st
= new_st
->block
;
9411 /* Set up IF condition: Call _gfortran_is_extension_of. */
9412 new_st
->expr1
= gfc_get_expr ();
9413 new_st
->expr1
->expr_type
= EXPR_FUNCTION
;
9414 new_st
->expr1
->ts
.type
= BT_LOGICAL
;
9415 new_st
->expr1
->ts
.kind
= 4;
9416 new_st
->expr1
->value
.function
.name
= gfc_get_string (PREFIX ("is_extension_of"));
9417 new_st
->expr1
->value
.function
.isym
= XCNEW (gfc_intrinsic_sym
);
9418 new_st
->expr1
->value
.function
.isym
->id
= GFC_ISYM_EXTENDS_TYPE_OF
;
9419 /* Set up arguments. */
9420 new_st
->expr1
->value
.function
.actual
= gfc_get_actual_arglist ();
9421 new_st
->expr1
->value
.function
.actual
->expr
= gfc_get_variable_expr (selector_expr
->symtree
);
9422 new_st
->expr1
->value
.function
.actual
->expr
->where
= code
->loc
;
9423 new_st
->expr1
->where
= code
->loc
;
9424 gfc_add_vptr_component (new_st
->expr1
->value
.function
.actual
->expr
);
9425 vtab
= gfc_find_derived_vtab (body
->ext
.block
.case_list
->ts
.u
.derived
);
9426 st
= gfc_find_symtree (vtab
->ns
->sym_root
, vtab
->name
);
9427 new_st
->expr1
->value
.function
.actual
->next
= gfc_get_actual_arglist ();
9428 new_st
->expr1
->value
.function
.actual
->next
->expr
= gfc_get_variable_expr (st
);
9429 new_st
->expr1
->value
.function
.actual
->next
->expr
->where
= code
->loc
;
9430 new_st
->next
= body
->next
;
9432 if (default_case
->next
)
9434 new_st
->block
= gfc_get_code (EXEC_IF
);
9435 new_st
= new_st
->block
;
9436 new_st
->next
= default_case
->next
;
9439 /* Replace CLASS DEFAULT code by the IF chain. */
9440 default_case
->next
= if_st
;
9443 /* Resolve the internal code. This cannot be done earlier because
9444 it requires that the sym->assoc of selectors is set already. */
9445 gfc_current_ns
= ns
;
9446 gfc_resolve_blocks (code
->block
, gfc_current_ns
);
9447 gfc_current_ns
= old_ns
;
9454 /* Resolve a transfer statement. This is making sure that:
9455 -- a derived type being transferred has only non-pointer components
9456 -- a derived type being transferred doesn't have private components, unless
9457 it's being transferred from the module where the type was defined
9458 -- we're not trying to transfer a whole assumed size array. */
9461 resolve_transfer (gfc_code
*code
)
9463 gfc_symbol
*sym
, *derived
;
9467 bool formatted
= false;
9468 gfc_dt
*dt
= code
->ext
.dt
;
9469 gfc_symbol
*dtio_sub
= NULL
;
9473 while (exp
!= NULL
&& exp
->expr_type
== EXPR_OP
9474 && exp
->value
.op
.op
== INTRINSIC_PARENTHESES
)
9475 exp
= exp
->value
.op
.op1
;
9477 if (exp
&& exp
->expr_type
== EXPR_NULL
9480 gfc_error ("Invalid context for NULL () intrinsic at %L",
9485 if (exp
== NULL
|| (exp
->expr_type
!= EXPR_VARIABLE
9486 && exp
->expr_type
!= EXPR_FUNCTION
9487 && exp
->expr_type
!= EXPR_STRUCTURE
))
9490 /* If we are reading, the variable will be changed. Note that
9491 code->ext.dt may be NULL if the TRANSFER is related to
9492 an INQUIRE statement -- but in this case, we are not reading, either. */
9493 if (dt
&& dt
->dt_io_kind
->value
.iokind
== M_READ
9494 && !gfc_check_vardef_context (exp
, false, false, false,
9498 const gfc_typespec
*ts
= exp
->expr_type
== EXPR_STRUCTURE
9499 || exp
->expr_type
== EXPR_FUNCTION
9500 ? &exp
->ts
: &exp
->symtree
->n
.sym
->ts
;
9502 /* Go to actual component transferred. */
9503 for (ref
= exp
->ref
; ref
; ref
= ref
->next
)
9504 if (ref
->type
== REF_COMPONENT
)
9505 ts
= &ref
->u
.c
.component
->ts
;
9507 if (dt
&& dt
->dt_io_kind
->value
.iokind
!= M_INQUIRE
9508 && (ts
->type
== BT_DERIVED
|| ts
->type
== BT_CLASS
))
9510 derived
= ts
->u
.derived
;
9512 /* Determine when to use the formatted DTIO procedure. */
9513 if (dt
&& (dt
->format_expr
|| dt
->format_label
))
9516 write
= dt
->dt_io_kind
->value
.iokind
== M_WRITE
9517 || dt
->dt_io_kind
->value
.iokind
== M_PRINT
;
9518 dtio_sub
= gfc_find_specific_dtio_proc (derived
, write
, formatted
);
9520 if (dtio_sub
!= NULL
&& exp
->expr_type
== EXPR_VARIABLE
)
9523 sym
= exp
->symtree
->n
.sym
->ns
->proc_name
;
9524 /* Check to see if this is a nested DTIO call, with the
9525 dummy as the io-list object. */
9526 if (sym
&& sym
== dtio_sub
&& sym
->formal
9527 && sym
->formal
->sym
== exp
->symtree
->n
.sym
9528 && exp
->ref
== NULL
)
9530 if (!sym
->attr
.recursive
)
9532 gfc_error ("DTIO %s procedure at %L must be recursive",
9533 sym
->name
, &sym
->declared_at
);
9540 if (ts
->type
== BT_CLASS
&& dtio_sub
== NULL
)
9542 gfc_error ("Data transfer element at %L cannot be polymorphic unless "
9543 "it is processed by a defined input/output procedure",
9548 if (ts
->type
== BT_DERIVED
)
9550 /* Check that transferred derived type doesn't contain POINTER
9551 components unless it is processed by a defined input/output
9553 if (ts
->u
.derived
->attr
.pointer_comp
&& dtio_sub
== NULL
)
9555 gfc_error ("Data transfer element at %L cannot have POINTER "
9556 "components unless it is processed by a defined "
9557 "input/output procedure", &code
->loc
);
9562 if (ts
->u
.derived
->attr
.proc_pointer_comp
)
9564 gfc_error ("Data transfer element at %L cannot have "
9565 "procedure pointer components", &code
->loc
);
9569 if (ts
->u
.derived
->attr
.alloc_comp
&& dtio_sub
== NULL
)
9571 gfc_error ("Data transfer element at %L cannot have ALLOCATABLE "
9572 "components unless it is processed by a defined "
9573 "input/output procedure", &code
->loc
);
9577 /* C_PTR and C_FUNPTR have private components which means they cannot
9578 be printed. However, if -std=gnu and not -pedantic, allow
9579 the component to be printed to help debugging. */
9580 if (ts
->u
.derived
->ts
.f90_type
== BT_VOID
)
9582 if (!gfc_notify_std (GFC_STD_GNU
, "Data transfer element at %L "
9583 "cannot have PRIVATE components", &code
->loc
))
9586 else if (derived_inaccessible (ts
->u
.derived
) && dtio_sub
== NULL
)
9588 gfc_error ("Data transfer element at %L cannot have "
9589 "PRIVATE components unless it is processed by "
9590 "a defined input/output procedure", &code
->loc
);
9595 if (exp
->expr_type
== EXPR_STRUCTURE
)
9598 sym
= exp
->symtree
->n
.sym
;
9600 if (sym
->as
!= NULL
&& sym
->as
->type
== AS_ASSUMED_SIZE
&& exp
->ref
9601 && exp
->ref
->type
== REF_ARRAY
&& exp
->ref
->u
.ar
.type
== AR_FULL
)
9603 gfc_error ("Data transfer element at %L cannot be a full reference to "
9604 "an assumed-size array", &code
->loc
);
9608 if (async_io_dt
&& exp
->expr_type
== EXPR_VARIABLE
)
9609 exp
->symtree
->n
.sym
->attr
.asynchronous
= 1;
9613 /*********** Toplevel code resolution subroutines ***********/
9615 /* Find the set of labels that are reachable from this block. We also
9616 record the last statement in each block. */
9619 find_reachable_labels (gfc_code
*block
)
9626 cs_base
->reachable_labels
= bitmap_alloc (&labels_obstack
);
9628 /* Collect labels in this block. We don't keep those corresponding
9629 to END {IF|SELECT}, these are checked in resolve_branch by going
9630 up through the code_stack. */
9631 for (c
= block
; c
; c
= c
->next
)
9633 if (c
->here
&& c
->op
!= EXEC_END_NESTED_BLOCK
)
9634 bitmap_set_bit (cs_base
->reachable_labels
, c
->here
->value
);
9637 /* Merge with labels from parent block. */
9640 gcc_assert (cs_base
->prev
->reachable_labels
);
9641 bitmap_ior_into (cs_base
->reachable_labels
,
9642 cs_base
->prev
->reachable_labels
);
9648 resolve_lock_unlock_event (gfc_code
*code
)
9650 if (code
->expr1
->expr_type
== EXPR_FUNCTION
9651 && code
->expr1
->value
.function
.isym
9652 && code
->expr1
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
)
9653 remove_caf_get_intrinsic (code
->expr1
);
9655 if ((code
->op
== EXEC_LOCK
|| code
->op
== EXEC_UNLOCK
)
9656 && (code
->expr1
->ts
.type
!= BT_DERIVED
9657 || code
->expr1
->expr_type
!= EXPR_VARIABLE
9658 || code
->expr1
->ts
.u
.derived
->from_intmod
!= INTMOD_ISO_FORTRAN_ENV
9659 || code
->expr1
->ts
.u
.derived
->intmod_sym_id
!= ISOFORTRAN_LOCK_TYPE
9660 || code
->expr1
->rank
!= 0
9661 || (!gfc_is_coarray (code
->expr1
) &&
9662 !gfc_is_coindexed (code
->expr1
))))
9663 gfc_error ("Lock variable at %L must be a scalar of type LOCK_TYPE",
9664 &code
->expr1
->where
);
9665 else if ((code
->op
== EXEC_EVENT_POST
|| code
->op
== EXEC_EVENT_WAIT
)
9666 && (code
->expr1
->ts
.type
!= BT_DERIVED
9667 || code
->expr1
->expr_type
!= EXPR_VARIABLE
9668 || code
->expr1
->ts
.u
.derived
->from_intmod
9669 != INTMOD_ISO_FORTRAN_ENV
9670 || code
->expr1
->ts
.u
.derived
->intmod_sym_id
9671 != ISOFORTRAN_EVENT_TYPE
9672 || code
->expr1
->rank
!= 0))
9673 gfc_error ("Event variable at %L must be a scalar of type EVENT_TYPE",
9674 &code
->expr1
->where
);
9675 else if (code
->op
== EXEC_EVENT_POST
&& !gfc_is_coarray (code
->expr1
)
9676 && !gfc_is_coindexed (code
->expr1
))
9677 gfc_error ("Event variable argument at %L must be a coarray or coindexed",
9678 &code
->expr1
->where
);
9679 else if (code
->op
== EXEC_EVENT_WAIT
&& !gfc_is_coarray (code
->expr1
))
9680 gfc_error ("Event variable argument at %L must be a coarray but not "
9681 "coindexed", &code
->expr1
->where
);
9685 && (code
->expr2
->ts
.type
!= BT_INTEGER
|| code
->expr2
->rank
!= 0
9686 || code
->expr2
->expr_type
!= EXPR_VARIABLE
))
9687 gfc_error ("STAT= argument at %L must be a scalar INTEGER variable",
9688 &code
->expr2
->where
);
9691 && !gfc_check_vardef_context (code
->expr2
, false, false, false,
9692 _("STAT variable")))
9697 && (code
->expr3
->ts
.type
!= BT_CHARACTER
|| code
->expr3
->rank
!= 0
9698 || code
->expr3
->expr_type
!= EXPR_VARIABLE
))
9699 gfc_error ("ERRMSG= argument at %L must be a scalar CHARACTER variable",
9700 &code
->expr3
->where
);
9703 && !gfc_check_vardef_context (code
->expr3
, false, false, false,
9704 _("ERRMSG variable")))
9707 /* Check for LOCK the ACQUIRED_LOCK. */
9708 if (code
->op
!= EXEC_EVENT_WAIT
&& code
->expr4
9709 && (code
->expr4
->ts
.type
!= BT_LOGICAL
|| code
->expr4
->rank
!= 0
9710 || code
->expr4
->expr_type
!= EXPR_VARIABLE
))
9711 gfc_error ("ACQUIRED_LOCK= argument at %L must be a scalar LOGICAL "
9712 "variable", &code
->expr4
->where
);
9714 if (code
->op
!= EXEC_EVENT_WAIT
&& code
->expr4
9715 && !gfc_check_vardef_context (code
->expr4
, false, false, false,
9716 _("ACQUIRED_LOCK variable")))
9719 /* Check for EVENT WAIT the UNTIL_COUNT. */
9720 if (code
->op
== EXEC_EVENT_WAIT
&& code
->expr4
)
9722 if (!gfc_resolve_expr (code
->expr4
) || code
->expr4
->ts
.type
!= BT_INTEGER
9723 || code
->expr4
->rank
!= 0)
9724 gfc_error ("UNTIL_COUNT= argument at %L must be a scalar INTEGER "
9725 "expression", &code
->expr4
->where
);
9731 resolve_critical (gfc_code
*code
)
9733 gfc_symtree
*symtree
;
9734 gfc_symbol
*lock_type
;
9735 char name
[GFC_MAX_SYMBOL_LEN
];
9736 static int serial
= 0;
9738 if (flag_coarray
!= GFC_FCOARRAY_LIB
)
9741 symtree
= gfc_find_symtree (gfc_current_ns
->sym_root
,
9742 GFC_PREFIX ("lock_type"));
9744 lock_type
= symtree
->n
.sym
;
9747 if (gfc_get_sym_tree (GFC_PREFIX ("lock_type"), gfc_current_ns
, &symtree
,
9750 lock_type
= symtree
->n
.sym
;
9751 lock_type
->attr
.flavor
= FL_DERIVED
;
9752 lock_type
->attr
.zero_comp
= 1;
9753 lock_type
->from_intmod
= INTMOD_ISO_FORTRAN_ENV
;
9754 lock_type
->intmod_sym_id
= ISOFORTRAN_LOCK_TYPE
;
9757 sprintf(name
, GFC_PREFIX ("lock_var") "%d",serial
++);
9758 if (gfc_get_sym_tree (name
, gfc_current_ns
, &symtree
, false) != 0)
9761 code
->resolved_sym
= symtree
->n
.sym
;
9762 symtree
->n
.sym
->attr
.flavor
= FL_VARIABLE
;
9763 symtree
->n
.sym
->attr
.referenced
= 1;
9764 symtree
->n
.sym
->attr
.artificial
= 1;
9765 symtree
->n
.sym
->attr
.codimension
= 1;
9766 symtree
->n
.sym
->ts
.type
= BT_DERIVED
;
9767 symtree
->n
.sym
->ts
.u
.derived
= lock_type
;
9768 symtree
->n
.sym
->as
= gfc_get_array_spec ();
9769 symtree
->n
.sym
->as
->corank
= 1;
9770 symtree
->n
.sym
->as
->type
= AS_EXPLICIT
;
9771 symtree
->n
.sym
->as
->cotype
= AS_EXPLICIT
;
9772 symtree
->n
.sym
->as
->lower
[0] = gfc_get_int_expr (gfc_default_integer_kind
,
9774 gfc_commit_symbols();
9779 resolve_sync (gfc_code
*code
)
9781 /* Check imageset. The * case matches expr1 == NULL. */
9784 if (code
->expr1
->ts
.type
!= BT_INTEGER
|| code
->expr1
->rank
> 1)
9785 gfc_error ("Imageset argument at %L must be a scalar or rank-1 "
9786 "INTEGER expression", &code
->expr1
->where
);
9787 if (code
->expr1
->expr_type
== EXPR_CONSTANT
&& code
->expr1
->rank
== 0
9788 && mpz_cmp_si (code
->expr1
->value
.integer
, 1) < 0)
9789 gfc_error ("Imageset argument at %L must between 1 and num_images()",
9790 &code
->expr1
->where
);
9791 else if (code
->expr1
->expr_type
== EXPR_ARRAY
9792 && gfc_simplify_expr (code
->expr1
, 0))
9794 gfc_constructor
*cons
;
9795 cons
= gfc_constructor_first (code
->expr1
->value
.constructor
);
9796 for (; cons
; cons
= gfc_constructor_next (cons
))
9797 if (cons
->expr
->expr_type
== EXPR_CONSTANT
9798 && mpz_cmp_si (cons
->expr
->value
.integer
, 1) < 0)
9799 gfc_error ("Imageset argument at %L must between 1 and "
9800 "num_images()", &cons
->expr
->where
);
9805 gfc_resolve_expr (code
->expr2
);
9807 && (code
->expr2
->ts
.type
!= BT_INTEGER
|| code
->expr2
->rank
!= 0
9808 || code
->expr2
->expr_type
!= EXPR_VARIABLE
))
9809 gfc_error ("STAT= argument at %L must be a scalar INTEGER variable",
9810 &code
->expr2
->where
);
9813 gfc_resolve_expr (code
->expr3
);
9815 && (code
->expr3
->ts
.type
!= BT_CHARACTER
|| code
->expr3
->rank
!= 0
9816 || code
->expr3
->expr_type
!= EXPR_VARIABLE
))
9817 gfc_error ("ERRMSG= argument at %L must be a scalar CHARACTER variable",
9818 &code
->expr3
->where
);
9822 /* Given a branch to a label, see if the branch is conforming.
9823 The code node describes where the branch is located. */
9826 resolve_branch (gfc_st_label
*label
, gfc_code
*code
)
9833 /* Step one: is this a valid branching target? */
9835 if (label
->defined
== ST_LABEL_UNKNOWN
)
9837 gfc_error ("Label %d referenced at %L is never defined", label
->value
,
9842 if (label
->defined
!= ST_LABEL_TARGET
&& label
->defined
!= ST_LABEL_DO_TARGET
)
9844 gfc_error ("Statement at %L is not a valid branch target statement "
9845 "for the branch statement at %L", &label
->where
, &code
->loc
);
9849 /* Step two: make sure this branch is not a branch to itself ;-) */
9851 if (code
->here
== label
)
9854 "Branch at %L may result in an infinite loop", &code
->loc
);
9858 /* Step three: See if the label is in the same block as the
9859 branching statement. The hard work has been done by setting up
9860 the bitmap reachable_labels. */
9862 if (bitmap_bit_p (cs_base
->reachable_labels
, label
->value
))
9864 /* Check now whether there is a CRITICAL construct; if so, check
9865 whether the label is still visible outside of the CRITICAL block,
9866 which is invalid. */
9867 for (stack
= cs_base
; stack
; stack
= stack
->prev
)
9869 if (stack
->current
->op
== EXEC_CRITICAL
9870 && bitmap_bit_p (stack
->reachable_labels
, label
->value
))
9871 gfc_error ("GOTO statement at %L leaves CRITICAL construct for "
9872 "label at %L", &code
->loc
, &label
->where
);
9873 else if (stack
->current
->op
== EXEC_DO_CONCURRENT
9874 && bitmap_bit_p (stack
->reachable_labels
, label
->value
))
9875 gfc_error ("GOTO statement at %L leaves DO CONCURRENT construct "
9876 "for label at %L", &code
->loc
, &label
->where
);
9882 /* Step four: If we haven't found the label in the bitmap, it may
9883 still be the label of the END of the enclosing block, in which
9884 case we find it by going up the code_stack. */
9886 for (stack
= cs_base
; stack
; stack
= stack
->prev
)
9888 if (stack
->current
->next
&& stack
->current
->next
->here
== label
)
9890 if (stack
->current
->op
== EXEC_CRITICAL
)
9892 /* Note: A label at END CRITICAL does not leave the CRITICAL
9893 construct as END CRITICAL is still part of it. */
9894 gfc_error ("GOTO statement at %L leaves CRITICAL construct for label"
9895 " at %L", &code
->loc
, &label
->where
);
9898 else if (stack
->current
->op
== EXEC_DO_CONCURRENT
)
9900 gfc_error ("GOTO statement at %L leaves DO CONCURRENT construct for "
9901 "label at %L", &code
->loc
, &label
->where
);
9908 gcc_assert (stack
->current
->next
->op
== EXEC_END_NESTED_BLOCK
);
9912 /* The label is not in an enclosing block, so illegal. This was
9913 allowed in Fortran 66, so we allow it as extension. No
9914 further checks are necessary in this case. */
9915 gfc_notify_std (GFC_STD_LEGACY
, "Label at %L is not in the same block "
9916 "as the GOTO statement at %L", &label
->where
,
9922 /* Check whether EXPR1 has the same shape as EXPR2. */
9925 resolve_where_shape (gfc_expr
*expr1
, gfc_expr
*expr2
)
9927 mpz_t shape
[GFC_MAX_DIMENSIONS
];
9928 mpz_t shape2
[GFC_MAX_DIMENSIONS
];
9929 bool result
= false;
9932 /* Compare the rank. */
9933 if (expr1
->rank
!= expr2
->rank
)
9936 /* Compare the size of each dimension. */
9937 for (i
=0; i
<expr1
->rank
; i
++)
9939 if (!gfc_array_dimen_size (expr1
, i
, &shape
[i
]))
9942 if (!gfc_array_dimen_size (expr2
, i
, &shape2
[i
]))
9945 if (mpz_cmp (shape
[i
], shape2
[i
]))
9949 /* When either of the two expression is an assumed size array, we
9950 ignore the comparison of dimension sizes. */
9955 gfc_clear_shape (shape
, i
);
9956 gfc_clear_shape (shape2
, i
);
9961 /* Check whether a WHERE assignment target or a WHERE mask expression
9962 has the same shape as the outmost WHERE mask expression. */
9965 resolve_where (gfc_code
*code
, gfc_expr
*mask
)
9971 cblock
= code
->block
;
9973 /* Store the first WHERE mask-expr of the WHERE statement or construct.
9974 In case of nested WHERE, only the outmost one is stored. */
9975 if (mask
== NULL
) /* outmost WHERE */
9977 else /* inner WHERE */
9984 /* Check if the mask-expr has a consistent shape with the
9985 outmost WHERE mask-expr. */
9986 if (!resolve_where_shape (cblock
->expr1
, e
))
9987 gfc_error ("WHERE mask at %L has inconsistent shape",
9988 &cblock
->expr1
->where
);
9991 /* the assignment statement of a WHERE statement, or the first
9992 statement in where-body-construct of a WHERE construct */
9993 cnext
= cblock
->next
;
9998 /* WHERE assignment statement */
10001 /* Check shape consistent for WHERE assignment target. */
10002 if (e
&& !resolve_where_shape (cnext
->expr1
, e
))
10003 gfc_error ("WHERE assignment target at %L has "
10004 "inconsistent shape", &cnext
->expr1
->where
);
10008 case EXEC_ASSIGN_CALL
:
10009 resolve_call (cnext
);
10010 if (!cnext
->resolved_sym
->attr
.elemental
)
10011 gfc_error("Non-ELEMENTAL user-defined assignment in WHERE at %L",
10012 &cnext
->ext
.actual
->expr
->where
);
10015 /* WHERE or WHERE construct is part of a where-body-construct */
10017 resolve_where (cnext
, e
);
10021 gfc_error ("Unsupported statement inside WHERE at %L",
10024 /* the next statement within the same where-body-construct */
10025 cnext
= cnext
->next
;
10027 /* the next masked-elsewhere-stmt, elsewhere-stmt, or end-where-stmt */
10028 cblock
= cblock
->block
;
10033 /* Resolve assignment in FORALL construct.
10034 NVAR is the number of FORALL index variables, and VAR_EXPR records the
10035 FORALL index variables. */
10038 gfc_resolve_assign_in_forall (gfc_code
*code
, int nvar
, gfc_expr
**var_expr
)
10042 for (n
= 0; n
< nvar
; n
++)
10044 gfc_symbol
*forall_index
;
10046 forall_index
= var_expr
[n
]->symtree
->n
.sym
;
10048 /* Check whether the assignment target is one of the FORALL index
10050 if ((code
->expr1
->expr_type
== EXPR_VARIABLE
)
10051 && (code
->expr1
->symtree
->n
.sym
== forall_index
))
10052 gfc_error ("Assignment to a FORALL index variable at %L",
10053 &code
->expr1
->where
);
10056 /* If one of the FORALL index variables doesn't appear in the
10057 assignment variable, then there could be a many-to-one
10058 assignment. Emit a warning rather than an error because the
10059 mask could be resolving this problem. */
10060 if (!find_forall_index (code
->expr1
, forall_index
, 0))
10061 gfc_warning (0, "The FORALL with index %qs is not used on the "
10062 "left side of the assignment at %L and so might "
10063 "cause multiple assignment to this object",
10064 var_expr
[n
]->symtree
->name
, &code
->expr1
->where
);
10070 /* Resolve WHERE statement in FORALL construct. */
10073 gfc_resolve_where_code_in_forall (gfc_code
*code
, int nvar
,
10074 gfc_expr
**var_expr
)
10079 cblock
= code
->block
;
10082 /* the assignment statement of a WHERE statement, or the first
10083 statement in where-body-construct of a WHERE construct */
10084 cnext
= cblock
->next
;
10089 /* WHERE assignment statement */
10091 gfc_resolve_assign_in_forall (cnext
, nvar
, var_expr
);
10094 /* WHERE operator assignment statement */
10095 case EXEC_ASSIGN_CALL
:
10096 resolve_call (cnext
);
10097 if (!cnext
->resolved_sym
->attr
.elemental
)
10098 gfc_error("Non-ELEMENTAL user-defined assignment in WHERE at %L",
10099 &cnext
->ext
.actual
->expr
->where
);
10102 /* WHERE or WHERE construct is part of a where-body-construct */
10104 gfc_resolve_where_code_in_forall (cnext
, nvar
, var_expr
);
10108 gfc_error ("Unsupported statement inside WHERE at %L",
10111 /* the next statement within the same where-body-construct */
10112 cnext
= cnext
->next
;
10114 /* the next masked-elsewhere-stmt, elsewhere-stmt, or end-where-stmt */
10115 cblock
= cblock
->block
;
10120 /* Traverse the FORALL body to check whether the following errors exist:
10121 1. For assignment, check if a many-to-one assignment happens.
10122 2. For WHERE statement, check the WHERE body to see if there is any
10123 many-to-one assignment. */
10126 gfc_resolve_forall_body (gfc_code
*code
, int nvar
, gfc_expr
**var_expr
)
10130 c
= code
->block
->next
;
10136 case EXEC_POINTER_ASSIGN
:
10137 gfc_resolve_assign_in_forall (c
, nvar
, var_expr
);
10140 case EXEC_ASSIGN_CALL
:
10144 /* Because the gfc_resolve_blocks() will handle the nested FORALL,
10145 there is no need to handle it here. */
10149 gfc_resolve_where_code_in_forall(c
, nvar
, var_expr
);
10154 /* The next statement in the FORALL body. */
10160 /* Counts the number of iterators needed inside a forall construct, including
10161 nested forall constructs. This is used to allocate the needed memory
10162 in gfc_resolve_forall. */
10165 gfc_count_forall_iterators (gfc_code
*code
)
10167 int max_iters
, sub_iters
, current_iters
;
10168 gfc_forall_iterator
*fa
;
10170 gcc_assert(code
->op
== EXEC_FORALL
);
10174 for (fa
= code
->ext
.forall_iterator
; fa
; fa
= fa
->next
)
10177 code
= code
->block
->next
;
10181 if (code
->op
== EXEC_FORALL
)
10183 sub_iters
= gfc_count_forall_iterators (code
);
10184 if (sub_iters
> max_iters
)
10185 max_iters
= sub_iters
;
10190 return current_iters
+ max_iters
;
10194 /* Given a FORALL construct, first resolve the FORALL iterator, then call
10195 gfc_resolve_forall_body to resolve the FORALL body. */
10198 gfc_resolve_forall (gfc_code
*code
, gfc_namespace
*ns
, int forall_save
)
10200 static gfc_expr
**var_expr
;
10201 static int total_var
= 0;
10202 static int nvar
= 0;
10203 int i
, old_nvar
, tmp
;
10204 gfc_forall_iterator
*fa
;
10208 if (!gfc_notify_std (GFC_STD_F2018_OBS
, "FORALL construct at %L", &code
->loc
))
10211 /* Start to resolve a FORALL construct */
10212 if (forall_save
== 0)
10214 /* Count the total number of FORALL indices in the nested FORALL
10215 construct in order to allocate the VAR_EXPR with proper size. */
10216 total_var
= gfc_count_forall_iterators (code
);
10218 /* Allocate VAR_EXPR with NUMBER_OF_FORALL_INDEX elements. */
10219 var_expr
= XCNEWVEC (gfc_expr
*, total_var
);
10222 /* The information about FORALL iterator, including FORALL indices start, end
10223 and stride. An outer FORALL indice cannot appear in start, end or stride. */
10224 for (fa
= code
->ext
.forall_iterator
; fa
; fa
= fa
->next
)
10226 /* Fortran 20008: C738 (R753). */
10227 if (fa
->var
->ref
&& fa
->var
->ref
->type
== REF_ARRAY
)
10229 gfc_error ("FORALL index-name at %L must be a scalar variable "
10230 "of type integer", &fa
->var
->where
);
10234 /* Check if any outer FORALL index name is the same as the current
10236 for (i
= 0; i
< nvar
; i
++)
10238 if (fa
->var
->symtree
->n
.sym
== var_expr
[i
]->symtree
->n
.sym
)
10239 gfc_error ("An outer FORALL construct already has an index "
10240 "with this name %L", &fa
->var
->where
);
10243 /* Record the current FORALL index. */
10244 var_expr
[nvar
] = gfc_copy_expr (fa
->var
);
10248 /* No memory leak. */
10249 gcc_assert (nvar
<= total_var
);
10252 /* Resolve the FORALL body. */
10253 gfc_resolve_forall_body (code
, nvar
, var_expr
);
10255 /* May call gfc_resolve_forall to resolve the inner FORALL loop. */
10256 gfc_resolve_blocks (code
->block
, ns
);
10260 /* Free only the VAR_EXPRs allocated in this frame. */
10261 for (i
= nvar
; i
< tmp
; i
++)
10262 gfc_free_expr (var_expr
[i
]);
10266 /* We are in the outermost FORALL construct. */
10267 gcc_assert (forall_save
== 0);
10269 /* VAR_EXPR is not needed any more. */
10276 /* Resolve a BLOCK construct statement. */
10279 resolve_block_construct (gfc_code
* code
)
10281 /* Resolve the BLOCK's namespace. */
10282 gfc_resolve (code
->ext
.block
.ns
);
10284 /* For an ASSOCIATE block, the associations (and their targets) are already
10285 resolved during resolve_symbol. */
10289 /* Resolve lists of blocks found in IF, SELECT CASE, WHERE, FORALL, GOTO and
10293 gfc_resolve_blocks (gfc_code
*b
, gfc_namespace
*ns
)
10297 for (; b
; b
= b
->block
)
10299 t
= gfc_resolve_expr (b
->expr1
);
10300 if (!gfc_resolve_expr (b
->expr2
))
10306 if (t
&& b
->expr1
!= NULL
10307 && (b
->expr1
->ts
.type
!= BT_LOGICAL
|| b
->expr1
->rank
!= 0))
10308 gfc_error ("IF clause at %L requires a scalar LOGICAL expression",
10314 && b
->expr1
!= NULL
10315 && (b
->expr1
->ts
.type
!= BT_LOGICAL
|| b
->expr1
->rank
== 0))
10316 gfc_error ("WHERE/ELSEWHERE clause at %L requires a LOGICAL array",
10321 resolve_branch (b
->label1
, b
);
10325 resolve_block_construct (b
);
10329 case EXEC_SELECT_TYPE
:
10332 case EXEC_DO_WHILE
:
10333 case EXEC_DO_CONCURRENT
:
10334 case EXEC_CRITICAL
:
10337 case EXEC_IOLENGTH
:
10341 case EXEC_OMP_ATOMIC
:
10342 case EXEC_OACC_ATOMIC
:
10344 gfc_omp_atomic_op aop
10345 = (gfc_omp_atomic_op
) (b
->ext
.omp_atomic
& GFC_OMP_ATOMIC_MASK
);
10347 /* Verify this before calling gfc_resolve_code, which might
10349 gcc_assert (b
->next
&& b
->next
->op
== EXEC_ASSIGN
);
10350 gcc_assert (((aop
!= GFC_OMP_ATOMIC_CAPTURE
)
10351 && b
->next
->next
== NULL
)
10352 || ((aop
== GFC_OMP_ATOMIC_CAPTURE
)
10353 && b
->next
->next
!= NULL
10354 && b
->next
->next
->op
== EXEC_ASSIGN
10355 && b
->next
->next
->next
== NULL
));
10359 case EXEC_OACC_PARALLEL_LOOP
:
10360 case EXEC_OACC_PARALLEL
:
10361 case EXEC_OACC_KERNELS_LOOP
:
10362 case EXEC_OACC_KERNELS
:
10363 case EXEC_OACC_DATA
:
10364 case EXEC_OACC_HOST_DATA
:
10365 case EXEC_OACC_LOOP
:
10366 case EXEC_OACC_UPDATE
:
10367 case EXEC_OACC_WAIT
:
10368 case EXEC_OACC_CACHE
:
10369 case EXEC_OACC_ENTER_DATA
:
10370 case EXEC_OACC_EXIT_DATA
:
10371 case EXEC_OACC_ROUTINE
:
10372 case EXEC_OMP_CRITICAL
:
10373 case EXEC_OMP_DISTRIBUTE
:
10374 case EXEC_OMP_DISTRIBUTE_PARALLEL_DO
:
10375 case EXEC_OMP_DISTRIBUTE_PARALLEL_DO_SIMD
:
10376 case EXEC_OMP_DISTRIBUTE_SIMD
:
10378 case EXEC_OMP_DO_SIMD
:
10379 case EXEC_OMP_MASTER
:
10380 case EXEC_OMP_ORDERED
:
10381 case EXEC_OMP_PARALLEL
:
10382 case EXEC_OMP_PARALLEL_DO
:
10383 case EXEC_OMP_PARALLEL_DO_SIMD
:
10384 case EXEC_OMP_PARALLEL_SECTIONS
:
10385 case EXEC_OMP_PARALLEL_WORKSHARE
:
10386 case EXEC_OMP_SECTIONS
:
10387 case EXEC_OMP_SIMD
:
10388 case EXEC_OMP_SINGLE
:
10389 case EXEC_OMP_TARGET
:
10390 case EXEC_OMP_TARGET_DATA
:
10391 case EXEC_OMP_TARGET_ENTER_DATA
:
10392 case EXEC_OMP_TARGET_EXIT_DATA
:
10393 case EXEC_OMP_TARGET_PARALLEL
:
10394 case EXEC_OMP_TARGET_PARALLEL_DO
:
10395 case EXEC_OMP_TARGET_PARALLEL_DO_SIMD
:
10396 case EXEC_OMP_TARGET_SIMD
:
10397 case EXEC_OMP_TARGET_TEAMS
:
10398 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE
:
10399 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO
:
10400 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
10401 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_SIMD
:
10402 case EXEC_OMP_TARGET_UPDATE
:
10403 case EXEC_OMP_TASK
:
10404 case EXEC_OMP_TASKGROUP
:
10405 case EXEC_OMP_TASKLOOP
:
10406 case EXEC_OMP_TASKLOOP_SIMD
:
10407 case EXEC_OMP_TASKWAIT
:
10408 case EXEC_OMP_TASKYIELD
:
10409 case EXEC_OMP_TEAMS
:
10410 case EXEC_OMP_TEAMS_DISTRIBUTE
:
10411 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO
:
10412 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
10413 case EXEC_OMP_TEAMS_DISTRIBUTE_SIMD
:
10414 case EXEC_OMP_WORKSHARE
:
10418 gfc_internal_error ("gfc_resolve_blocks(): Bad block type");
10421 gfc_resolve_code (b
->next
, ns
);
10426 /* Does everything to resolve an ordinary assignment. Returns true
10427 if this is an interface assignment. */
10429 resolve_ordinary_assign (gfc_code
*code
, gfc_namespace
*ns
)
10436 symbol_attribute attr
;
10438 if (gfc_extend_assign (code
, ns
))
10442 if (code
->op
== EXEC_ASSIGN_CALL
)
10444 lhs
= code
->ext
.actual
->expr
;
10445 rhsptr
= &code
->ext
.actual
->next
->expr
;
10449 gfc_actual_arglist
* args
;
10450 gfc_typebound_proc
* tbp
;
10452 gcc_assert (code
->op
== EXEC_COMPCALL
);
10454 args
= code
->expr1
->value
.compcall
.actual
;
10456 rhsptr
= &args
->next
->expr
;
10458 tbp
= code
->expr1
->value
.compcall
.tbp
;
10459 gcc_assert (!tbp
->is_generic
);
10462 /* Make a temporary rhs when there is a default initializer
10463 and rhs is the same symbol as the lhs. */
10464 if ((*rhsptr
)->expr_type
== EXPR_VARIABLE
10465 && (*rhsptr
)->symtree
->n
.sym
->ts
.type
== BT_DERIVED
10466 && gfc_has_default_initializer ((*rhsptr
)->symtree
->n
.sym
->ts
.u
.derived
)
10467 && (lhs
->symtree
->n
.sym
== (*rhsptr
)->symtree
->n
.sym
))
10468 *rhsptr
= gfc_get_parentheses (*rhsptr
);
10477 && !gfc_notify_std (GFC_STD_GNU
, "BOZ literal at %L outside "
10478 "a DATA statement and outside INT/REAL/DBLE/CMPLX",
10482 /* Handle the case of a BOZ literal on the RHS. */
10483 if (rhs
->is_boz
&& lhs
->ts
.type
!= BT_INTEGER
)
10486 if (warn_surprising
)
10487 gfc_warning (OPT_Wsurprising
,
10488 "BOZ literal at %L is bitwise transferred "
10489 "non-integer symbol %qs", &code
->loc
,
10490 lhs
->symtree
->n
.sym
->name
);
10492 if (!gfc_convert_boz (rhs
, &lhs
->ts
))
10494 if ((rc
= gfc_range_check (rhs
)) != ARITH_OK
)
10496 if (rc
== ARITH_UNDERFLOW
)
10497 gfc_error ("Arithmetic underflow of bit-wise transferred BOZ at %L"
10498 ". This check can be disabled with the option "
10499 "%<-fno-range-check%>", &rhs
->where
);
10500 else if (rc
== ARITH_OVERFLOW
)
10501 gfc_error ("Arithmetic overflow of bit-wise transferred BOZ at %L"
10502 ". This check can be disabled with the option "
10503 "%<-fno-range-check%>", &rhs
->where
);
10504 else if (rc
== ARITH_NAN
)
10505 gfc_error ("Arithmetic NaN of bit-wise transferred BOZ at %L"
10506 ". This check can be disabled with the option "
10507 "%<-fno-range-check%>", &rhs
->where
);
10512 if (lhs
->ts
.type
== BT_CHARACTER
10513 && warn_character_truncation
)
10515 HOST_WIDE_INT llen
= 0, rlen
= 0;
10516 if (lhs
->ts
.u
.cl
!= NULL
10517 && lhs
->ts
.u
.cl
->length
!= NULL
10518 && lhs
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
)
10519 llen
= gfc_mpz_get_hwi (lhs
->ts
.u
.cl
->length
->value
.integer
);
10521 if (rhs
->expr_type
== EXPR_CONSTANT
)
10522 rlen
= rhs
->value
.character
.length
;
10524 else if (rhs
->ts
.u
.cl
!= NULL
10525 && rhs
->ts
.u
.cl
->length
!= NULL
10526 && rhs
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
)
10527 rlen
= gfc_mpz_get_hwi (rhs
->ts
.u
.cl
->length
->value
.integer
);
10529 if (rlen
&& llen
&& rlen
> llen
)
10530 gfc_warning_now (OPT_Wcharacter_truncation
,
10531 "CHARACTER expression will be truncated "
10532 "in assignment (%ld/%ld) at %L",
10533 (long) llen
, (long) rlen
, &code
->loc
);
10536 /* Ensure that a vector index expression for the lvalue is evaluated
10537 to a temporary if the lvalue symbol is referenced in it. */
10540 for (ref
= lhs
->ref
; ref
; ref
= ref
->next
)
10541 if (ref
->type
== REF_ARRAY
)
10543 for (n
= 0; n
< ref
->u
.ar
.dimen
; n
++)
10544 if (ref
->u
.ar
.dimen_type
[n
] == DIMEN_VECTOR
10545 && gfc_find_sym_in_expr (lhs
->symtree
->n
.sym
,
10546 ref
->u
.ar
.start
[n
]))
10548 = gfc_get_parentheses (ref
->u
.ar
.start
[n
]);
10552 if (gfc_pure (NULL
))
10554 if (lhs
->ts
.type
== BT_DERIVED
10555 && lhs
->expr_type
== EXPR_VARIABLE
10556 && lhs
->ts
.u
.derived
->attr
.pointer_comp
10557 && rhs
->expr_type
== EXPR_VARIABLE
10558 && (gfc_impure_variable (rhs
->symtree
->n
.sym
)
10559 || gfc_is_coindexed (rhs
)))
10561 /* F2008, C1283. */
10562 if (gfc_is_coindexed (rhs
))
10563 gfc_error ("Coindexed expression at %L is assigned to "
10564 "a derived type variable with a POINTER "
10565 "component in a PURE procedure",
10568 gfc_error ("The impure variable at %L is assigned to "
10569 "a derived type variable with a POINTER "
10570 "component in a PURE procedure (12.6)",
10575 /* Fortran 2008, C1283. */
10576 if (gfc_is_coindexed (lhs
))
10578 gfc_error ("Assignment to coindexed variable at %L in a PURE "
10579 "procedure", &rhs
->where
);
10584 if (gfc_implicit_pure (NULL
))
10586 if (lhs
->expr_type
== EXPR_VARIABLE
10587 && lhs
->symtree
->n
.sym
!= gfc_current_ns
->proc_name
10588 && lhs
->symtree
->n
.sym
->ns
!= gfc_current_ns
)
10589 gfc_unset_implicit_pure (NULL
);
10591 if (lhs
->ts
.type
== BT_DERIVED
10592 && lhs
->expr_type
== EXPR_VARIABLE
10593 && lhs
->ts
.u
.derived
->attr
.pointer_comp
10594 && rhs
->expr_type
== EXPR_VARIABLE
10595 && (gfc_impure_variable (rhs
->symtree
->n
.sym
)
10596 || gfc_is_coindexed (rhs
)))
10597 gfc_unset_implicit_pure (NULL
);
10599 /* Fortran 2008, C1283. */
10600 if (gfc_is_coindexed (lhs
))
10601 gfc_unset_implicit_pure (NULL
);
10604 /* F2008, 7.2.1.2. */
10605 attr
= gfc_expr_attr (lhs
);
10606 if (lhs
->ts
.type
== BT_CLASS
&& attr
.allocatable
)
10608 if (attr
.codimension
)
10610 gfc_error ("Assignment to polymorphic coarray at %L is not "
10611 "permitted", &lhs
->where
);
10614 if (!gfc_notify_std (GFC_STD_F2008
, "Assignment to an allocatable "
10615 "polymorphic variable at %L", &lhs
->where
))
10617 if (!flag_realloc_lhs
)
10619 gfc_error ("Assignment to an allocatable polymorphic variable at %L "
10620 "requires %<-frealloc-lhs%>", &lhs
->where
);
10624 else if (lhs
->ts
.type
== BT_CLASS
)
10626 gfc_error ("Nonallocatable variable must not be polymorphic in intrinsic "
10627 "assignment at %L - check that there is a matching specific "
10628 "subroutine for '=' operator", &lhs
->where
);
10632 bool lhs_coindexed
= gfc_is_coindexed (lhs
);
10634 /* F2008, Section 7.2.1.2. */
10635 if (lhs_coindexed
&& gfc_has_ultimate_allocatable (lhs
))
10637 gfc_error ("Coindexed variable must not have an allocatable ultimate "
10638 "component in assignment at %L", &lhs
->where
);
10642 /* Assign the 'data' of a class object to a derived type. */
10643 if (lhs
->ts
.type
== BT_DERIVED
10644 && rhs
->ts
.type
== BT_CLASS
10645 && rhs
->expr_type
!= EXPR_ARRAY
)
10646 gfc_add_data_component (rhs
);
10648 /* Make sure there is a vtable and, in particular, a _copy for the
10650 if (UNLIMITED_POLY (lhs
) && lhs
->rank
&& rhs
->ts
.type
!= BT_CLASS
)
10651 gfc_find_vtab (&rhs
->ts
);
10653 bool caf_convert_to_send
= flag_coarray
== GFC_FCOARRAY_LIB
10655 || (code
->expr2
->expr_type
== EXPR_FUNCTION
10656 && code
->expr2
->value
.function
.isym
10657 && code
->expr2
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
10658 && (code
->expr1
->rank
== 0 || code
->expr2
->rank
!= 0)
10659 && !gfc_expr_attr (rhs
).allocatable
10660 && !gfc_has_vector_subscript (rhs
)));
10662 gfc_check_assign (lhs
, rhs
, 1, !caf_convert_to_send
);
10664 /* Insert a GFC_ISYM_CAF_SEND intrinsic, when the LHS is a coindexed variable.
10665 Additionally, insert this code when the RHS is a CAF as we then use the
10666 GFC_ISYM_CAF_SEND intrinsic just to avoid a temporary; but do not do so if
10667 the LHS is (re)allocatable or has a vector subscript. If the LHS is a
10668 noncoindexed array and the RHS is a coindexed scalar, use the normal code
10670 if (caf_convert_to_send
)
10672 if (code
->expr2
->expr_type
== EXPR_FUNCTION
10673 && code
->expr2
->value
.function
.isym
10674 && code
->expr2
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
)
10675 remove_caf_get_intrinsic (code
->expr2
);
10676 code
->op
= EXEC_CALL
;
10677 gfc_get_sym_tree (GFC_PREFIX ("caf_send"), ns
, &code
->symtree
, true);
10678 code
->resolved_sym
= code
->symtree
->n
.sym
;
10679 code
->resolved_sym
->attr
.flavor
= FL_PROCEDURE
;
10680 code
->resolved_sym
->attr
.intrinsic
= 1;
10681 code
->resolved_sym
->attr
.subroutine
= 1;
10682 code
->resolved_isym
= gfc_intrinsic_subroutine_by_id (GFC_ISYM_CAF_SEND
);
10683 gfc_commit_symbol (code
->resolved_sym
);
10684 code
->ext
.actual
= gfc_get_actual_arglist ();
10685 code
->ext
.actual
->expr
= lhs
;
10686 code
->ext
.actual
->next
= gfc_get_actual_arglist ();
10687 code
->ext
.actual
->next
->expr
= rhs
;
10688 code
->expr1
= NULL
;
10689 code
->expr2
= NULL
;
10696 /* Add a component reference onto an expression. */
10699 add_comp_ref (gfc_expr
*e
, gfc_component
*c
)
10704 ref
= &((*ref
)->next
);
10705 *ref
= gfc_get_ref ();
10706 (*ref
)->type
= REF_COMPONENT
;
10707 (*ref
)->u
.c
.sym
= e
->ts
.u
.derived
;
10708 (*ref
)->u
.c
.component
= c
;
10711 /* Add a full array ref, as necessary. */
10714 gfc_add_full_array_ref (e
, c
->as
);
10715 e
->rank
= c
->as
->rank
;
10720 /* Build an assignment. Keep the argument 'op' for future use, so that
10721 pointer assignments can be made. */
10724 build_assignment (gfc_exec_op op
, gfc_expr
*expr1
, gfc_expr
*expr2
,
10725 gfc_component
*comp1
, gfc_component
*comp2
, locus loc
)
10727 gfc_code
*this_code
;
10729 this_code
= gfc_get_code (op
);
10730 this_code
->next
= NULL
;
10731 this_code
->expr1
= gfc_copy_expr (expr1
);
10732 this_code
->expr2
= gfc_copy_expr (expr2
);
10733 this_code
->loc
= loc
;
10734 if (comp1
&& comp2
)
10736 add_comp_ref (this_code
->expr1
, comp1
);
10737 add_comp_ref (this_code
->expr2
, comp2
);
10744 /* Makes a temporary variable expression based on the characteristics of
10745 a given variable expression. */
10748 get_temp_from_expr (gfc_expr
*e
, gfc_namespace
*ns
)
10750 static int serial
= 0;
10751 char name
[GFC_MAX_SYMBOL_LEN
];
10753 gfc_array_spec
*as
;
10754 gfc_array_ref
*aref
;
10757 sprintf (name
, GFC_PREFIX("DA%d"), serial
++);
10758 gfc_get_sym_tree (name
, ns
, &tmp
, false);
10759 gfc_add_type (tmp
->n
.sym
, &e
->ts
, NULL
);
10761 if (e
->expr_type
== EXPR_CONSTANT
&& e
->ts
.type
== BT_CHARACTER
)
10762 tmp
->n
.sym
->ts
.u
.cl
->length
= gfc_get_int_expr (gfc_charlen_int_kind
,
10764 e
->value
.character
.length
);
10770 /* Obtain the arrayspec for the temporary. */
10771 if (e
->rank
&& e
->expr_type
!= EXPR_ARRAY
10772 && e
->expr_type
!= EXPR_FUNCTION
10773 && e
->expr_type
!= EXPR_OP
)
10775 aref
= gfc_find_array_ref (e
);
10776 if (e
->expr_type
== EXPR_VARIABLE
10777 && e
->symtree
->n
.sym
->as
== aref
->as
)
10781 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
10782 if (ref
->type
== REF_COMPONENT
10783 && ref
->u
.c
.component
->as
== aref
->as
)
10791 /* Add the attributes and the arrayspec to the temporary. */
10792 tmp
->n
.sym
->attr
= gfc_expr_attr (e
);
10793 tmp
->n
.sym
->attr
.function
= 0;
10794 tmp
->n
.sym
->attr
.result
= 0;
10795 tmp
->n
.sym
->attr
.flavor
= FL_VARIABLE
;
10796 tmp
->n
.sym
->attr
.dummy
= 0;
10797 tmp
->n
.sym
->attr
.intent
= INTENT_UNKNOWN
;
10801 tmp
->n
.sym
->as
= gfc_copy_array_spec (as
);
10804 if (as
->type
== AS_DEFERRED
)
10805 tmp
->n
.sym
->attr
.allocatable
= 1;
10807 else if (e
->rank
&& (e
->expr_type
== EXPR_ARRAY
10808 || e
->expr_type
== EXPR_FUNCTION
10809 || e
->expr_type
== EXPR_OP
))
10811 tmp
->n
.sym
->as
= gfc_get_array_spec ();
10812 tmp
->n
.sym
->as
->type
= AS_DEFERRED
;
10813 tmp
->n
.sym
->as
->rank
= e
->rank
;
10814 tmp
->n
.sym
->attr
.allocatable
= 1;
10815 tmp
->n
.sym
->attr
.dimension
= 1;
10818 tmp
->n
.sym
->attr
.dimension
= 0;
10820 gfc_set_sym_referenced (tmp
->n
.sym
);
10821 gfc_commit_symbol (tmp
->n
.sym
);
10822 e
= gfc_lval_expr_from_sym (tmp
->n
.sym
);
10824 /* Should the lhs be a section, use its array ref for the
10825 temporary expression. */
10826 if (aref
&& aref
->type
!= AR_FULL
)
10828 gfc_free_ref_list (e
->ref
);
10829 e
->ref
= gfc_copy_ref (ref
);
10835 /* Add one line of code to the code chain, making sure that 'head' and
10836 'tail' are appropriately updated. */
10839 add_code_to_chain (gfc_code
**this_code
, gfc_code
**head
, gfc_code
**tail
)
10841 gcc_assert (this_code
);
10843 *head
= *tail
= *this_code
;
10845 *tail
= gfc_append_code (*tail
, *this_code
);
10850 /* Counts the potential number of part array references that would
10851 result from resolution of typebound defined assignments. */
10854 nonscalar_typebound_assign (gfc_symbol
*derived
, int depth
)
10857 int c_depth
= 0, t_depth
;
10859 for (c
= derived
->components
; c
; c
= c
->next
)
10861 if ((!gfc_bt_struct (c
->ts
.type
)
10863 || c
->attr
.allocatable
10864 || c
->attr
.proc_pointer_comp
10865 || c
->attr
.class_pointer
10866 || c
->attr
.proc_pointer
)
10867 && !c
->attr
.defined_assign_comp
)
10870 if (c
->as
&& c_depth
== 0)
10873 if (c
->ts
.u
.derived
->attr
.defined_assign_comp
)
10874 t_depth
= nonscalar_typebound_assign (c
->ts
.u
.derived
,
10879 c_depth
= t_depth
> c_depth
? t_depth
: c_depth
;
10881 return depth
+ c_depth
;
10885 /* Implement 7.2.1.3 of the F08 standard:
10886 "An intrinsic assignment where the variable is of derived type is
10887 performed as if each component of the variable were assigned from the
10888 corresponding component of expr using pointer assignment (7.2.2) for
10889 each pointer component, defined assignment for each nonpointer
10890 nonallocatable component of a type that has a type-bound defined
10891 assignment consistent with the component, intrinsic assignment for
10892 each other nonpointer nonallocatable component, ..."
10894 The pointer assignments are taken care of by the intrinsic
10895 assignment of the structure itself. This function recursively adds
10896 defined assignments where required. The recursion is accomplished
10897 by calling gfc_resolve_code.
10899 When the lhs in a defined assignment has intent INOUT, we need a
10900 temporary for the lhs. In pseudo-code:
10902 ! Only call function lhs once.
10903 if (lhs is not a constant or an variable)
10906 ! Do the intrinsic assignment
10908 ! Now do the defined assignments
10909 do over components with typebound defined assignment [%cmp]
10910 #if one component's assignment procedure is INOUT
10912 #if expr2 non-variable
10918 t1%cmp {defined=} expr2%cmp
10924 expr1%cmp {defined=} expr2%cmp
10928 /* The temporary assignments have to be put on top of the additional
10929 code to avoid the result being changed by the intrinsic assignment.
10931 static int component_assignment_level
= 0;
10932 static gfc_code
*tmp_head
= NULL
, *tmp_tail
= NULL
;
10935 generate_component_assignments (gfc_code
**code
, gfc_namespace
*ns
)
10937 gfc_component
*comp1
, *comp2
;
10938 gfc_code
*this_code
= NULL
, *head
= NULL
, *tail
= NULL
;
10940 int error_count
, depth
;
10942 gfc_get_errors (NULL
, &error_count
);
10944 /* Filter out continuing processing after an error. */
10946 || (*code
)->expr1
->ts
.type
!= BT_DERIVED
10947 || (*code
)->expr2
->ts
.type
!= BT_DERIVED
)
10950 /* TODO: Handle more than one part array reference in assignments. */
10951 depth
= nonscalar_typebound_assign ((*code
)->expr1
->ts
.u
.derived
,
10952 (*code
)->expr1
->rank
? 1 : 0);
10955 gfc_warning (0, "TODO: type-bound defined assignment(s) at %L not "
10956 "done because multiple part array references would "
10957 "occur in intermediate expressions.", &(*code
)->loc
);
10961 component_assignment_level
++;
10963 /* Create a temporary so that functions get called only once. */
10964 if ((*code
)->expr2
->expr_type
!= EXPR_VARIABLE
10965 && (*code
)->expr2
->expr_type
!= EXPR_CONSTANT
)
10967 gfc_expr
*tmp_expr
;
10969 /* Assign the rhs to the temporary. */
10970 tmp_expr
= get_temp_from_expr ((*code
)->expr1
, ns
);
10971 this_code
= build_assignment (EXEC_ASSIGN
,
10972 tmp_expr
, (*code
)->expr2
,
10973 NULL
, NULL
, (*code
)->loc
);
10974 /* Add the code and substitute the rhs expression. */
10975 add_code_to_chain (&this_code
, &tmp_head
, &tmp_tail
);
10976 gfc_free_expr ((*code
)->expr2
);
10977 (*code
)->expr2
= tmp_expr
;
10980 /* Do the intrinsic assignment. This is not needed if the lhs is one
10981 of the temporaries generated here, since the intrinsic assignment
10982 to the final result already does this. */
10983 if ((*code
)->expr1
->symtree
->n
.sym
->name
[2] != '@')
10985 this_code
= build_assignment (EXEC_ASSIGN
,
10986 (*code
)->expr1
, (*code
)->expr2
,
10987 NULL
, NULL
, (*code
)->loc
);
10988 add_code_to_chain (&this_code
, &head
, &tail
);
10991 comp1
= (*code
)->expr1
->ts
.u
.derived
->components
;
10992 comp2
= (*code
)->expr2
->ts
.u
.derived
->components
;
10995 for (; comp1
; comp1
= comp1
->next
, comp2
= comp2
->next
)
10997 bool inout
= false;
10999 /* The intrinsic assignment does the right thing for pointers
11000 of all kinds and allocatable components. */
11001 if (!gfc_bt_struct (comp1
->ts
.type
)
11002 || comp1
->attr
.pointer
11003 || comp1
->attr
.allocatable
11004 || comp1
->attr
.proc_pointer_comp
11005 || comp1
->attr
.class_pointer
11006 || comp1
->attr
.proc_pointer
)
11009 /* Make an assigment for this component. */
11010 this_code
= build_assignment (EXEC_ASSIGN
,
11011 (*code
)->expr1
, (*code
)->expr2
,
11012 comp1
, comp2
, (*code
)->loc
);
11014 /* Convert the assignment if there is a defined assignment for
11015 this type. Otherwise, using the call from gfc_resolve_code,
11016 recurse into its components. */
11017 gfc_resolve_code (this_code
, ns
);
11019 if (this_code
->op
== EXEC_ASSIGN_CALL
)
11021 gfc_formal_arglist
*dummy_args
;
11023 /* Check that there is a typebound defined assignment. If not,
11024 then this must be a module defined assignment. We cannot
11025 use the defined_assign_comp attribute here because it must
11026 be this derived type that has the defined assignment and not
11028 if (!(comp1
->ts
.u
.derived
->f2k_derived
11029 && comp1
->ts
.u
.derived
->f2k_derived
11030 ->tb_op
[INTRINSIC_ASSIGN
]))
11032 gfc_free_statements (this_code
);
11037 /* If the first argument of the subroutine has intent INOUT
11038 a temporary must be generated and used instead. */
11039 rsym
= this_code
->resolved_sym
;
11040 dummy_args
= gfc_sym_get_dummy_args (rsym
);
11042 && dummy_args
->sym
->attr
.intent
== INTENT_INOUT
)
11044 gfc_code
*temp_code
;
11047 /* Build the temporary required for the assignment and put
11048 it at the head of the generated code. */
11051 t1
= get_temp_from_expr ((*code
)->expr1
, ns
);
11052 temp_code
= build_assignment (EXEC_ASSIGN
,
11053 t1
, (*code
)->expr1
,
11054 NULL
, NULL
, (*code
)->loc
);
11056 /* For allocatable LHS, check whether it is allocated. Note
11057 that allocatable components with defined assignment are
11058 not yet support. See PR 57696. */
11059 if ((*code
)->expr1
->symtree
->n
.sym
->attr
.allocatable
)
11063 gfc_lval_expr_from_sym ((*code
)->expr1
->symtree
->n
.sym
);
11064 block
= gfc_get_code (EXEC_IF
);
11065 block
->block
= gfc_get_code (EXEC_IF
);
11066 block
->block
->expr1
11067 = gfc_build_intrinsic_call (ns
,
11068 GFC_ISYM_ALLOCATED
, "allocated",
11069 (*code
)->loc
, 1, e
);
11070 block
->block
->next
= temp_code
;
11073 add_code_to_chain (&temp_code
, &tmp_head
, &tmp_tail
);
11076 /* Replace the first actual arg with the component of the
11078 gfc_free_expr (this_code
->ext
.actual
->expr
);
11079 this_code
->ext
.actual
->expr
= gfc_copy_expr (t1
);
11080 add_comp_ref (this_code
->ext
.actual
->expr
, comp1
);
11082 /* If the LHS variable is allocatable and wasn't allocated and
11083 the temporary is allocatable, pointer assign the address of
11084 the freshly allocated LHS to the temporary. */
11085 if ((*code
)->expr1
->symtree
->n
.sym
->attr
.allocatable
11086 && gfc_expr_attr ((*code
)->expr1
).allocatable
)
11091 cond
= gfc_get_expr ();
11092 cond
->ts
.type
= BT_LOGICAL
;
11093 cond
->ts
.kind
= gfc_default_logical_kind
;
11094 cond
->expr_type
= EXPR_OP
;
11095 cond
->where
= (*code
)->loc
;
11096 cond
->value
.op
.op
= INTRINSIC_NOT
;
11097 cond
->value
.op
.op1
= gfc_build_intrinsic_call (ns
,
11098 GFC_ISYM_ALLOCATED
, "allocated",
11099 (*code
)->loc
, 1, gfc_copy_expr (t1
));
11100 block
= gfc_get_code (EXEC_IF
);
11101 block
->block
= gfc_get_code (EXEC_IF
);
11102 block
->block
->expr1
= cond
;
11103 block
->block
->next
= build_assignment (EXEC_POINTER_ASSIGN
,
11104 t1
, (*code
)->expr1
,
11105 NULL
, NULL
, (*code
)->loc
);
11106 add_code_to_chain (&block
, &head
, &tail
);
11110 else if (this_code
->op
== EXEC_ASSIGN
&& !this_code
->next
)
11112 /* Don't add intrinsic assignments since they are already
11113 effected by the intrinsic assignment of the structure. */
11114 gfc_free_statements (this_code
);
11119 add_code_to_chain (&this_code
, &head
, &tail
);
11123 /* Transfer the value to the final result. */
11124 this_code
= build_assignment (EXEC_ASSIGN
,
11125 (*code
)->expr1
, t1
,
11126 comp1
, comp2
, (*code
)->loc
);
11127 add_code_to_chain (&this_code
, &head
, &tail
);
11131 /* Put the temporary assignments at the top of the generated code. */
11132 if (tmp_head
&& component_assignment_level
== 1)
11134 gfc_append_code (tmp_head
, head
);
11136 tmp_head
= tmp_tail
= NULL
;
11139 // If we did a pointer assignment - thus, we need to ensure that the LHS is
11140 // not accidentally deallocated. Hence, nullify t1.
11141 if (t1
&& (*code
)->expr1
->symtree
->n
.sym
->attr
.allocatable
11142 && gfc_expr_attr ((*code
)->expr1
).allocatable
)
11148 e
= gfc_lval_expr_from_sym ((*code
)->expr1
->symtree
->n
.sym
);
11149 cond
= gfc_build_intrinsic_call (ns
, GFC_ISYM_ASSOCIATED
, "associated",
11150 (*code
)->loc
, 2, gfc_copy_expr (t1
), e
);
11151 block
= gfc_get_code (EXEC_IF
);
11152 block
->block
= gfc_get_code (EXEC_IF
);
11153 block
->block
->expr1
= cond
;
11154 block
->block
->next
= build_assignment (EXEC_POINTER_ASSIGN
,
11155 t1
, gfc_get_null_expr (&(*code
)->loc
),
11156 NULL
, NULL
, (*code
)->loc
);
11157 gfc_append_code (tail
, block
);
11161 /* Now attach the remaining code chain to the input code. Step on
11162 to the end of the new code since resolution is complete. */
11163 gcc_assert ((*code
)->op
== EXEC_ASSIGN
);
11164 tail
->next
= (*code
)->next
;
11165 /* Overwrite 'code' because this would place the intrinsic assignment
11166 before the temporary for the lhs is created. */
11167 gfc_free_expr ((*code
)->expr1
);
11168 gfc_free_expr ((*code
)->expr2
);
11174 component_assignment_level
--;
11178 /* F2008: Pointer function assignments are of the form:
11179 ptr_fcn (args) = expr
11180 This function breaks these assignments into two statements:
11181 temporary_pointer => ptr_fcn(args)
11182 temporary_pointer = expr */
11185 resolve_ptr_fcn_assign (gfc_code
**code
, gfc_namespace
*ns
)
11187 gfc_expr
*tmp_ptr_expr
;
11188 gfc_code
*this_code
;
11189 gfc_component
*comp
;
11192 if ((*code
)->expr1
->expr_type
!= EXPR_FUNCTION
)
11195 /* Even if standard does not support this feature, continue to build
11196 the two statements to avoid upsetting frontend_passes.c. */
11197 gfc_notify_std (GFC_STD_F2008
, "Pointer procedure assignment at "
11198 "%L", &(*code
)->loc
);
11200 comp
= gfc_get_proc_ptr_comp ((*code
)->expr1
);
11203 s
= comp
->ts
.interface
;
11205 s
= (*code
)->expr1
->symtree
->n
.sym
;
11207 if (s
== NULL
|| !s
->result
->attr
.pointer
)
11209 gfc_error ("The function result on the lhs of the assignment at "
11210 "%L must have the pointer attribute.",
11211 &(*code
)->expr1
->where
);
11212 (*code
)->op
= EXEC_NOP
;
11216 tmp_ptr_expr
= get_temp_from_expr ((*code
)->expr2
, ns
);
11218 /* get_temp_from_expression is set up for ordinary assignments. To that
11219 end, where array bounds are not known, arrays are made allocatable.
11220 Change the temporary to a pointer here. */
11221 tmp_ptr_expr
->symtree
->n
.sym
->attr
.pointer
= 1;
11222 tmp_ptr_expr
->symtree
->n
.sym
->attr
.allocatable
= 0;
11223 tmp_ptr_expr
->where
= (*code
)->loc
;
11225 this_code
= build_assignment (EXEC_ASSIGN
,
11226 tmp_ptr_expr
, (*code
)->expr2
,
11227 NULL
, NULL
, (*code
)->loc
);
11228 this_code
->next
= (*code
)->next
;
11229 (*code
)->next
= this_code
;
11230 (*code
)->op
= EXEC_POINTER_ASSIGN
;
11231 (*code
)->expr2
= (*code
)->expr1
;
11232 (*code
)->expr1
= tmp_ptr_expr
;
11238 /* Deferred character length assignments from an operator expression
11239 require a temporary because the character length of the lhs can
11240 change in the course of the assignment. */
11243 deferred_op_assign (gfc_code
**code
, gfc_namespace
*ns
)
11245 gfc_expr
*tmp_expr
;
11246 gfc_code
*this_code
;
11248 if (!((*code
)->expr1
->ts
.type
== BT_CHARACTER
11249 && (*code
)->expr1
->ts
.deferred
&& (*code
)->expr1
->rank
11250 && (*code
)->expr2
->expr_type
== EXPR_OP
))
11253 if (!gfc_check_dependency ((*code
)->expr1
, (*code
)->expr2
, 1))
11256 if (gfc_expr_attr ((*code
)->expr1
).pointer
)
11259 tmp_expr
= get_temp_from_expr ((*code
)->expr1
, ns
);
11260 tmp_expr
->where
= (*code
)->loc
;
11262 /* A new charlen is required to ensure that the variable string
11263 length is different to that of the original lhs. */
11264 tmp_expr
->ts
.u
.cl
= gfc_get_charlen();
11265 tmp_expr
->symtree
->n
.sym
->ts
.u
.cl
= tmp_expr
->ts
.u
.cl
;
11266 tmp_expr
->ts
.u
.cl
->next
= (*code
)->expr2
->ts
.u
.cl
->next
;
11267 (*code
)->expr2
->ts
.u
.cl
->next
= tmp_expr
->ts
.u
.cl
;
11269 tmp_expr
->symtree
->n
.sym
->ts
.deferred
= 1;
11271 this_code
= build_assignment (EXEC_ASSIGN
,
11273 gfc_copy_expr (tmp_expr
),
11274 NULL
, NULL
, (*code
)->loc
);
11276 (*code
)->expr1
= tmp_expr
;
11278 this_code
->next
= (*code
)->next
;
11279 (*code
)->next
= this_code
;
11285 /* Given a block of code, recursively resolve everything pointed to by this
11289 gfc_resolve_code (gfc_code
*code
, gfc_namespace
*ns
)
11291 int omp_workshare_save
;
11292 int forall_save
, do_concurrent_save
;
11296 frame
.prev
= cs_base
;
11300 find_reachable_labels (code
);
11302 for (; code
; code
= code
->next
)
11304 frame
.current
= code
;
11305 forall_save
= forall_flag
;
11306 do_concurrent_save
= gfc_do_concurrent_flag
;
11308 if (code
->op
== EXEC_FORALL
)
11311 gfc_resolve_forall (code
, ns
, forall_save
);
11314 else if (code
->block
)
11316 omp_workshare_save
= -1;
11319 case EXEC_OACC_PARALLEL_LOOP
:
11320 case EXEC_OACC_PARALLEL
:
11321 case EXEC_OACC_KERNELS_LOOP
:
11322 case EXEC_OACC_KERNELS
:
11323 case EXEC_OACC_DATA
:
11324 case EXEC_OACC_HOST_DATA
:
11325 case EXEC_OACC_LOOP
:
11326 gfc_resolve_oacc_blocks (code
, ns
);
11328 case EXEC_OMP_PARALLEL_WORKSHARE
:
11329 omp_workshare_save
= omp_workshare_flag
;
11330 omp_workshare_flag
= 1;
11331 gfc_resolve_omp_parallel_blocks (code
, ns
);
11333 case EXEC_OMP_PARALLEL
:
11334 case EXEC_OMP_PARALLEL_DO
:
11335 case EXEC_OMP_PARALLEL_DO_SIMD
:
11336 case EXEC_OMP_PARALLEL_SECTIONS
:
11337 case EXEC_OMP_TARGET_PARALLEL
:
11338 case EXEC_OMP_TARGET_PARALLEL_DO
:
11339 case EXEC_OMP_TARGET_PARALLEL_DO_SIMD
:
11340 case EXEC_OMP_TARGET_TEAMS
:
11341 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE
:
11342 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO
:
11343 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
11344 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_SIMD
:
11345 case EXEC_OMP_TASK
:
11346 case EXEC_OMP_TASKLOOP
:
11347 case EXEC_OMP_TASKLOOP_SIMD
:
11348 case EXEC_OMP_TEAMS
:
11349 case EXEC_OMP_TEAMS_DISTRIBUTE
:
11350 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO
:
11351 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
11352 case EXEC_OMP_TEAMS_DISTRIBUTE_SIMD
:
11353 omp_workshare_save
= omp_workshare_flag
;
11354 omp_workshare_flag
= 0;
11355 gfc_resolve_omp_parallel_blocks (code
, ns
);
11357 case EXEC_OMP_DISTRIBUTE
:
11358 case EXEC_OMP_DISTRIBUTE_SIMD
:
11360 case EXEC_OMP_DO_SIMD
:
11361 case EXEC_OMP_SIMD
:
11362 case EXEC_OMP_TARGET_SIMD
:
11363 gfc_resolve_omp_do_blocks (code
, ns
);
11365 case EXEC_SELECT_TYPE
:
11366 /* Blocks are handled in resolve_select_type because we have
11367 to transform the SELECT TYPE into ASSOCIATE first. */
11369 case EXEC_DO_CONCURRENT
:
11370 gfc_do_concurrent_flag
= 1;
11371 gfc_resolve_blocks (code
->block
, ns
);
11372 gfc_do_concurrent_flag
= 2;
11374 case EXEC_OMP_WORKSHARE
:
11375 omp_workshare_save
= omp_workshare_flag
;
11376 omp_workshare_flag
= 1;
11379 gfc_resolve_blocks (code
->block
, ns
);
11383 if (omp_workshare_save
!= -1)
11384 omp_workshare_flag
= omp_workshare_save
;
11388 if (code
->op
!= EXEC_COMPCALL
&& code
->op
!= EXEC_CALL_PPC
)
11389 t
= gfc_resolve_expr (code
->expr1
);
11390 forall_flag
= forall_save
;
11391 gfc_do_concurrent_flag
= do_concurrent_save
;
11393 if (!gfc_resolve_expr (code
->expr2
))
11396 if (code
->op
== EXEC_ALLOCATE
11397 && !gfc_resolve_expr (code
->expr3
))
11403 case EXEC_END_BLOCK
:
11404 case EXEC_END_NESTED_BLOCK
:
11408 case EXEC_ERROR_STOP
:
11410 case EXEC_CONTINUE
:
11412 case EXEC_ASSIGN_CALL
:
11415 case EXEC_CRITICAL
:
11416 resolve_critical (code
);
11419 case EXEC_SYNC_ALL
:
11420 case EXEC_SYNC_IMAGES
:
11421 case EXEC_SYNC_MEMORY
:
11422 resolve_sync (code
);
11427 case EXEC_EVENT_POST
:
11428 case EXEC_EVENT_WAIT
:
11429 resolve_lock_unlock_event (code
);
11432 case EXEC_FAIL_IMAGE
:
11433 case EXEC_FORM_TEAM
:
11434 case EXEC_CHANGE_TEAM
:
11435 case EXEC_END_TEAM
:
11436 case EXEC_SYNC_TEAM
:
11440 /* Keep track of which entry we are up to. */
11441 current_entry_id
= code
->ext
.entry
->id
;
11445 resolve_where (code
, NULL
);
11449 if (code
->expr1
!= NULL
)
11451 if (code
->expr1
->ts
.type
!= BT_INTEGER
)
11452 gfc_error ("ASSIGNED GOTO statement at %L requires an "
11453 "INTEGER variable", &code
->expr1
->where
);
11454 else if (code
->expr1
->symtree
->n
.sym
->attr
.assign
!= 1)
11455 gfc_error ("Variable %qs has not been assigned a target "
11456 "label at %L", code
->expr1
->symtree
->n
.sym
->name
,
11457 &code
->expr1
->where
);
11460 resolve_branch (code
->label1
, code
);
11464 if (code
->expr1
!= NULL
11465 && (code
->expr1
->ts
.type
!= BT_INTEGER
|| code
->expr1
->rank
))
11466 gfc_error ("Alternate RETURN statement at %L requires a SCALAR-"
11467 "INTEGER return specifier", &code
->expr1
->where
);
11470 case EXEC_INIT_ASSIGN
:
11471 case EXEC_END_PROCEDURE
:
11478 /* Remove a GFC_ISYM_CAF_GET inserted for a coindexed variable on
11480 if (code
->expr1
->expr_type
== EXPR_FUNCTION
11481 && code
->expr1
->value
.function
.isym
11482 && code
->expr1
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
)
11483 remove_caf_get_intrinsic (code
->expr1
);
11485 /* If this is a pointer function in an lvalue variable context,
11486 the new code will have to be resolved afresh. This is also the
11487 case with an error, where the code is transformed into NOP to
11488 prevent ICEs downstream. */
11489 if (resolve_ptr_fcn_assign (&code
, ns
)
11490 || code
->op
== EXEC_NOP
)
11493 if (!gfc_check_vardef_context (code
->expr1
, false, false, false,
11497 if (resolve_ordinary_assign (code
, ns
))
11499 if (code
->op
== EXEC_COMPCALL
)
11505 /* Check for dependencies in deferred character length array
11506 assignments and generate a temporary, if necessary. */
11507 if (code
->op
== EXEC_ASSIGN
&& deferred_op_assign (&code
, ns
))
11510 /* F03 7.4.1.3 for non-allocatable, non-pointer components. */
11511 if (code
->op
!= EXEC_CALL
&& code
->expr1
->ts
.type
== BT_DERIVED
11512 && code
->expr1
->ts
.u
.derived
11513 && code
->expr1
->ts
.u
.derived
->attr
.defined_assign_comp
)
11514 generate_component_assignments (&code
, ns
);
11518 case EXEC_LABEL_ASSIGN
:
11519 if (code
->label1
->defined
== ST_LABEL_UNKNOWN
)
11520 gfc_error ("Label %d referenced at %L is never defined",
11521 code
->label1
->value
, &code
->label1
->where
);
11523 && (code
->expr1
->expr_type
!= EXPR_VARIABLE
11524 || code
->expr1
->symtree
->n
.sym
->ts
.type
!= BT_INTEGER
11525 || code
->expr1
->symtree
->n
.sym
->ts
.kind
11526 != gfc_default_integer_kind
11527 || code
->expr1
->symtree
->n
.sym
->as
!= NULL
))
11528 gfc_error ("ASSIGN statement at %L requires a scalar "
11529 "default INTEGER variable", &code
->expr1
->where
);
11532 case EXEC_POINTER_ASSIGN
:
11539 /* This is both a variable definition and pointer assignment
11540 context, so check both of them. For rank remapping, a final
11541 array ref may be present on the LHS and fool gfc_expr_attr
11542 used in gfc_check_vardef_context. Remove it. */
11543 e
= remove_last_array_ref (code
->expr1
);
11544 t
= gfc_check_vardef_context (e
, true, false, false,
11545 _("pointer assignment"));
11547 t
= gfc_check_vardef_context (e
, false, false, false,
11548 _("pointer assignment"));
11551 t
= gfc_check_pointer_assign (code
->expr1
, code
->expr2
, !t
) && t
;
11556 /* Assigning a class object always is a regular assign. */
11557 if (code
->expr2
->ts
.type
== BT_CLASS
11558 && code
->expr1
->ts
.type
== BT_CLASS
11559 && !CLASS_DATA (code
->expr2
)->attr
.dimension
11560 && !(gfc_expr_attr (code
->expr1
).proc_pointer
11561 && code
->expr2
->expr_type
== EXPR_VARIABLE
11562 && code
->expr2
->symtree
->n
.sym
->attr
.flavor
11564 code
->op
= EXEC_ASSIGN
;
11568 case EXEC_ARITHMETIC_IF
:
11570 gfc_expr
*e
= code
->expr1
;
11572 gfc_resolve_expr (e
);
11573 if (e
->expr_type
== EXPR_NULL
)
11574 gfc_error ("Invalid NULL at %L", &e
->where
);
11576 if (t
&& (e
->rank
> 0
11577 || !(e
->ts
.type
== BT_REAL
|| e
->ts
.type
== BT_INTEGER
)))
11578 gfc_error ("Arithmetic IF statement at %L requires a scalar "
11579 "REAL or INTEGER expression", &e
->where
);
11581 resolve_branch (code
->label1
, code
);
11582 resolve_branch (code
->label2
, code
);
11583 resolve_branch (code
->label3
, code
);
11588 if (t
&& code
->expr1
!= NULL
11589 && (code
->expr1
->ts
.type
!= BT_LOGICAL
11590 || code
->expr1
->rank
!= 0))
11591 gfc_error ("IF clause at %L requires a scalar LOGICAL expression",
11592 &code
->expr1
->where
);
11597 resolve_call (code
);
11600 case EXEC_COMPCALL
:
11602 resolve_typebound_subroutine (code
);
11605 case EXEC_CALL_PPC
:
11606 resolve_ppc_call (code
);
11610 /* Select is complicated. Also, a SELECT construct could be
11611 a transformed computed GOTO. */
11612 resolve_select (code
, false);
11615 case EXEC_SELECT_TYPE
:
11616 resolve_select_type (code
, ns
);
11620 resolve_block_construct (code
);
11624 if (code
->ext
.iterator
!= NULL
)
11626 gfc_iterator
*iter
= code
->ext
.iterator
;
11627 if (gfc_resolve_iterator (iter
, true, false))
11628 gfc_resolve_do_iterator (code
, iter
->var
->symtree
->n
.sym
,
11633 case EXEC_DO_WHILE
:
11634 if (code
->expr1
== NULL
)
11635 gfc_internal_error ("gfc_resolve_code(): No expression on "
11638 && (code
->expr1
->rank
!= 0
11639 || code
->expr1
->ts
.type
!= BT_LOGICAL
))
11640 gfc_error ("Exit condition of DO WHILE loop at %L must be "
11641 "a scalar LOGICAL expression", &code
->expr1
->where
);
11644 case EXEC_ALLOCATE
:
11646 resolve_allocate_deallocate (code
, "ALLOCATE");
11650 case EXEC_DEALLOCATE
:
11652 resolve_allocate_deallocate (code
, "DEALLOCATE");
11657 if (!gfc_resolve_open (code
->ext
.open
))
11660 resolve_branch (code
->ext
.open
->err
, code
);
11664 if (!gfc_resolve_close (code
->ext
.close
))
11667 resolve_branch (code
->ext
.close
->err
, code
);
11670 case EXEC_BACKSPACE
:
11674 if (!gfc_resolve_filepos (code
->ext
.filepos
, &code
->loc
))
11677 resolve_branch (code
->ext
.filepos
->err
, code
);
11681 if (!gfc_resolve_inquire (code
->ext
.inquire
))
11684 resolve_branch (code
->ext
.inquire
->err
, code
);
11687 case EXEC_IOLENGTH
:
11688 gcc_assert (code
->ext
.inquire
!= NULL
);
11689 if (!gfc_resolve_inquire (code
->ext
.inquire
))
11692 resolve_branch (code
->ext
.inquire
->err
, code
);
11696 if (!gfc_resolve_wait (code
->ext
.wait
))
11699 resolve_branch (code
->ext
.wait
->err
, code
);
11700 resolve_branch (code
->ext
.wait
->end
, code
);
11701 resolve_branch (code
->ext
.wait
->eor
, code
);
11706 if (!gfc_resolve_dt (code
->ext
.dt
, &code
->loc
))
11709 resolve_branch (code
->ext
.dt
->err
, code
);
11710 resolve_branch (code
->ext
.dt
->end
, code
);
11711 resolve_branch (code
->ext
.dt
->eor
, code
);
11714 case EXEC_TRANSFER
:
11715 resolve_transfer (code
);
11718 case EXEC_DO_CONCURRENT
:
11720 resolve_forall_iterators (code
->ext
.forall_iterator
);
11722 if (code
->expr1
!= NULL
11723 && (code
->expr1
->ts
.type
!= BT_LOGICAL
|| code
->expr1
->rank
))
11724 gfc_error ("FORALL mask clause at %L requires a scalar LOGICAL "
11725 "expression", &code
->expr1
->where
);
11728 case EXEC_OACC_PARALLEL_LOOP
:
11729 case EXEC_OACC_PARALLEL
:
11730 case EXEC_OACC_KERNELS_LOOP
:
11731 case EXEC_OACC_KERNELS
:
11732 case EXEC_OACC_DATA
:
11733 case EXEC_OACC_HOST_DATA
:
11734 case EXEC_OACC_LOOP
:
11735 case EXEC_OACC_UPDATE
:
11736 case EXEC_OACC_WAIT
:
11737 case EXEC_OACC_CACHE
:
11738 case EXEC_OACC_ENTER_DATA
:
11739 case EXEC_OACC_EXIT_DATA
:
11740 case EXEC_OACC_ATOMIC
:
11741 case EXEC_OACC_DECLARE
:
11742 gfc_resolve_oacc_directive (code
, ns
);
11745 case EXEC_OMP_ATOMIC
:
11746 case EXEC_OMP_BARRIER
:
11747 case EXEC_OMP_CANCEL
:
11748 case EXEC_OMP_CANCELLATION_POINT
:
11749 case EXEC_OMP_CRITICAL
:
11750 case EXEC_OMP_FLUSH
:
11751 case EXEC_OMP_DISTRIBUTE
:
11752 case EXEC_OMP_DISTRIBUTE_PARALLEL_DO
:
11753 case EXEC_OMP_DISTRIBUTE_PARALLEL_DO_SIMD
:
11754 case EXEC_OMP_DISTRIBUTE_SIMD
:
11756 case EXEC_OMP_DO_SIMD
:
11757 case EXEC_OMP_MASTER
:
11758 case EXEC_OMP_ORDERED
:
11759 case EXEC_OMP_SECTIONS
:
11760 case EXEC_OMP_SIMD
:
11761 case EXEC_OMP_SINGLE
:
11762 case EXEC_OMP_TARGET
:
11763 case EXEC_OMP_TARGET_DATA
:
11764 case EXEC_OMP_TARGET_ENTER_DATA
:
11765 case EXEC_OMP_TARGET_EXIT_DATA
:
11766 case EXEC_OMP_TARGET_PARALLEL
:
11767 case EXEC_OMP_TARGET_PARALLEL_DO
:
11768 case EXEC_OMP_TARGET_PARALLEL_DO_SIMD
:
11769 case EXEC_OMP_TARGET_SIMD
:
11770 case EXEC_OMP_TARGET_TEAMS
:
11771 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE
:
11772 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO
:
11773 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
11774 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_SIMD
:
11775 case EXEC_OMP_TARGET_UPDATE
:
11776 case EXEC_OMP_TASK
:
11777 case EXEC_OMP_TASKGROUP
:
11778 case EXEC_OMP_TASKLOOP
:
11779 case EXEC_OMP_TASKLOOP_SIMD
:
11780 case EXEC_OMP_TASKWAIT
:
11781 case EXEC_OMP_TASKYIELD
:
11782 case EXEC_OMP_TEAMS
:
11783 case EXEC_OMP_TEAMS_DISTRIBUTE
:
11784 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO
:
11785 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
11786 case EXEC_OMP_TEAMS_DISTRIBUTE_SIMD
:
11787 case EXEC_OMP_WORKSHARE
:
11788 gfc_resolve_omp_directive (code
, ns
);
11791 case EXEC_OMP_PARALLEL
:
11792 case EXEC_OMP_PARALLEL_DO
:
11793 case EXEC_OMP_PARALLEL_DO_SIMD
:
11794 case EXEC_OMP_PARALLEL_SECTIONS
:
11795 case EXEC_OMP_PARALLEL_WORKSHARE
:
11796 omp_workshare_save
= omp_workshare_flag
;
11797 omp_workshare_flag
= 0;
11798 gfc_resolve_omp_directive (code
, ns
);
11799 omp_workshare_flag
= omp_workshare_save
;
11803 gfc_internal_error ("gfc_resolve_code(): Bad statement code");
11807 cs_base
= frame
.prev
;
11811 /* Resolve initial values and make sure they are compatible with
11815 resolve_values (gfc_symbol
*sym
)
11819 if (sym
->value
== NULL
)
11822 if (sym
->value
->expr_type
== EXPR_STRUCTURE
)
11823 t
= resolve_structure_cons (sym
->value
, 1);
11825 t
= gfc_resolve_expr (sym
->value
);
11830 gfc_check_assign_symbol (sym
, NULL
, sym
->value
);
11834 /* Verify any BIND(C) derived types in the namespace so we can report errors
11835 for them once, rather than for each variable declared of that type. */
11838 resolve_bind_c_derived_types (gfc_symbol
*derived_sym
)
11840 if (derived_sym
!= NULL
&& derived_sym
->attr
.flavor
== FL_DERIVED
11841 && derived_sym
->attr
.is_bind_c
== 1)
11842 verify_bind_c_derived_type (derived_sym
);
11848 /* Check the interfaces of DTIO procedures associated with derived
11849 type 'sym'. These procedures can either have typebound bindings or
11850 can appear in DTIO generic interfaces. */
11853 gfc_verify_DTIO_procedures (gfc_symbol
*sym
)
11855 if (!sym
|| sym
->attr
.flavor
!= FL_DERIVED
)
11858 gfc_check_dtio_interfaces (sym
);
11863 /* Verify that any binding labels used in a given namespace do not collide
11864 with the names or binding labels of any global symbols. Multiple INTERFACE
11865 for the same procedure are permitted. */
11868 gfc_verify_binding_labels (gfc_symbol
*sym
)
11871 const char *module
;
11873 if (!sym
|| !sym
->attr
.is_bind_c
|| sym
->attr
.is_iso_c
11874 || sym
->attr
.flavor
== FL_DERIVED
|| !sym
->binding_label
)
11877 gsym
= gfc_find_case_gsymbol (gfc_gsym_root
, sym
->binding_label
);
11880 module
= sym
->module
;
11881 else if (sym
->ns
&& sym
->ns
->proc_name
11882 && sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
)
11883 module
= sym
->ns
->proc_name
->name
;
11884 else if (sym
->ns
&& sym
->ns
->parent
11885 && sym
->ns
&& sym
->ns
->parent
->proc_name
11886 && sym
->ns
->parent
->proc_name
->attr
.flavor
== FL_MODULE
)
11887 module
= sym
->ns
->parent
->proc_name
->name
;
11893 && (gsym
->type
== GSYM_FUNCTION
|| gsym
->type
== GSYM_SUBROUTINE
)))
11896 gsym
= gfc_get_gsymbol (sym
->binding_label
, true);
11897 gsym
->where
= sym
->declared_at
;
11898 gsym
->sym_name
= sym
->name
;
11899 gsym
->binding_label
= sym
->binding_label
;
11900 gsym
->ns
= sym
->ns
;
11901 gsym
->mod_name
= module
;
11902 if (sym
->attr
.function
)
11903 gsym
->type
= GSYM_FUNCTION
;
11904 else if (sym
->attr
.subroutine
)
11905 gsym
->type
= GSYM_SUBROUTINE
;
11906 /* Mark as variable/procedure as defined, unless its an INTERFACE. */
11907 gsym
->defined
= sym
->attr
.if_source
!= IFSRC_IFBODY
;
11911 if (sym
->attr
.flavor
== FL_VARIABLE
&& gsym
->type
!= GSYM_UNKNOWN
)
11913 gfc_error ("Variable %qs with binding label %qs at %L uses the same global "
11914 "identifier as entity at %L", sym
->name
,
11915 sym
->binding_label
, &sym
->declared_at
, &gsym
->where
);
11916 /* Clear the binding label to prevent checking multiple times. */
11917 sym
->binding_label
= NULL
;
11921 if (sym
->attr
.flavor
== FL_VARIABLE
&& module
11922 && (strcmp (module
, gsym
->mod_name
) != 0
11923 || strcmp (sym
->name
, gsym
->sym_name
) != 0))
11925 /* This can only happen if the variable is defined in a module - if it
11926 isn't the same module, reject it. */
11927 gfc_error ("Variable %qs from module %qs with binding label %qs at %L "
11928 "uses the same global identifier as entity at %L from module %qs",
11929 sym
->name
, module
, sym
->binding_label
,
11930 &sym
->declared_at
, &gsym
->where
, gsym
->mod_name
);
11931 sym
->binding_label
= NULL
;
11935 if ((sym
->attr
.function
|| sym
->attr
.subroutine
)
11936 && ((gsym
->type
!= GSYM_SUBROUTINE
&& gsym
->type
!= GSYM_FUNCTION
)
11937 || (gsym
->defined
&& sym
->attr
.if_source
!= IFSRC_IFBODY
))
11938 && (sym
!= gsym
->ns
->proc_name
&& sym
->attr
.entry
== 0)
11939 && (module
!= gsym
->mod_name
11940 || strcmp (gsym
->sym_name
, sym
->name
) != 0
11941 || (module
&& strcmp (module
, gsym
->mod_name
) != 0)))
11943 /* Print an error if the procedure is defined multiple times; we have to
11944 exclude references to the same procedure via module association or
11945 multiple checks for the same procedure. */
11946 gfc_error ("Procedure %qs with binding label %qs at %L uses the same "
11947 "global identifier as entity at %L", sym
->name
,
11948 sym
->binding_label
, &sym
->declared_at
, &gsym
->where
);
11949 sym
->binding_label
= NULL
;
11954 /* Resolve an index expression. */
11957 resolve_index_expr (gfc_expr
*e
)
11959 if (!gfc_resolve_expr (e
))
11962 if (!gfc_simplify_expr (e
, 0))
11965 if (!gfc_specification_expr (e
))
11972 /* Resolve a charlen structure. */
11975 resolve_charlen (gfc_charlen
*cl
)
11978 bool saved_specification_expr
;
11984 saved_specification_expr
= specification_expr
;
11985 specification_expr
= true;
11987 if (cl
->length_from_typespec
)
11989 if (!gfc_resolve_expr (cl
->length
))
11991 specification_expr
= saved_specification_expr
;
11995 if (!gfc_simplify_expr (cl
->length
, 0))
11997 specification_expr
= saved_specification_expr
;
12001 /* cl->length has been resolved. It should have an integer type. */
12002 if (cl
->length
->ts
.type
!= BT_INTEGER
)
12004 gfc_error ("Scalar INTEGER expression expected at %L",
12005 &cl
->length
->where
);
12011 if (!resolve_index_expr (cl
->length
))
12013 specification_expr
= saved_specification_expr
;
12018 /* F2008, 4.4.3.2: If the character length parameter value evaluates to
12019 a negative value, the length of character entities declared is zero. */
12020 if (cl
->length
&& cl
->length
->expr_type
== EXPR_CONSTANT
12021 && mpz_sgn (cl
->length
->value
.integer
) < 0)
12022 gfc_replace_expr (cl
->length
,
12023 gfc_get_int_expr (gfc_charlen_int_kind
, NULL
, 0));
12025 /* Check that the character length is not too large. */
12026 k
= gfc_validate_kind (BT_INTEGER
, gfc_charlen_int_kind
, false);
12027 if (cl
->length
&& cl
->length
->expr_type
== EXPR_CONSTANT
12028 && cl
->length
->ts
.type
== BT_INTEGER
12029 && mpz_cmp (cl
->length
->value
.integer
, gfc_integer_kinds
[k
].huge
) > 0)
12031 gfc_error ("String length at %L is too large", &cl
->length
->where
);
12032 specification_expr
= saved_specification_expr
;
12036 specification_expr
= saved_specification_expr
;
12041 /* Test for non-constant shape arrays. */
12044 is_non_constant_shape_array (gfc_symbol
*sym
)
12050 not_constant
= false;
12051 if (sym
->as
!= NULL
)
12053 /* Unfortunately, !gfc_is_compile_time_shape hits a legal case that
12054 has not been simplified; parameter array references. Do the
12055 simplification now. */
12056 for (i
= 0; i
< sym
->as
->rank
+ sym
->as
->corank
; i
++)
12058 e
= sym
->as
->lower
[i
];
12059 if (e
&& (!resolve_index_expr(e
)
12060 || !gfc_is_constant_expr (e
)))
12061 not_constant
= true;
12062 e
= sym
->as
->upper
[i
];
12063 if (e
&& (!resolve_index_expr(e
)
12064 || !gfc_is_constant_expr (e
)))
12065 not_constant
= true;
12068 return not_constant
;
12071 /* Given a symbol and an initialization expression, add code to initialize
12072 the symbol to the function entry. */
12074 build_init_assign (gfc_symbol
*sym
, gfc_expr
*init
)
12078 gfc_namespace
*ns
= sym
->ns
;
12080 /* Search for the function namespace if this is a contained
12081 function without an explicit result. */
12082 if (sym
->attr
.function
&& sym
== sym
->result
12083 && sym
->name
!= sym
->ns
->proc_name
->name
)
12085 ns
= ns
->contained
;
12086 for (;ns
; ns
= ns
->sibling
)
12087 if (strcmp (ns
->proc_name
->name
, sym
->name
) == 0)
12093 gfc_free_expr (init
);
12097 /* Build an l-value expression for the result. */
12098 lval
= gfc_lval_expr_from_sym (sym
);
12100 /* Add the code at scope entry. */
12101 init_st
= gfc_get_code (EXEC_INIT_ASSIGN
);
12102 init_st
->next
= ns
->code
;
12103 ns
->code
= init_st
;
12105 /* Assign the default initializer to the l-value. */
12106 init_st
->loc
= sym
->declared_at
;
12107 init_st
->expr1
= lval
;
12108 init_st
->expr2
= init
;
12112 /* Whether or not we can generate a default initializer for a symbol. */
12115 can_generate_init (gfc_symbol
*sym
)
12117 symbol_attribute
*a
;
12122 /* These symbols should never have a default initialization. */
12127 || (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
)
12128 && (CLASS_DATA (sym
)->attr
.class_pointer
12129 || CLASS_DATA (sym
)->attr
.proc_pointer
))
12130 || a
->in_equivalence
12137 || (!a
->referenced
&& !a
->result
)
12138 || (a
->dummy
&& a
->intent
!= INTENT_OUT
)
12139 || (a
->function
&& sym
!= sym
->result
)
12144 /* Assign the default initializer to a derived type variable or result. */
12147 apply_default_init (gfc_symbol
*sym
)
12149 gfc_expr
*init
= NULL
;
12151 if (sym
->attr
.flavor
!= FL_VARIABLE
&& !sym
->attr
.function
)
12154 if (sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
)
12155 init
= gfc_generate_initializer (&sym
->ts
, can_generate_init (sym
));
12157 if (init
== NULL
&& sym
->ts
.type
!= BT_CLASS
)
12160 build_init_assign (sym
, init
);
12161 sym
->attr
.referenced
= 1;
12165 /* Build an initializer for a local. Returns null if the symbol should not have
12166 a default initialization. */
12169 build_default_init_expr (gfc_symbol
*sym
)
12171 /* These symbols should never have a default initialization. */
12172 if (sym
->attr
.allocatable
12173 || sym
->attr
.external
12175 || sym
->attr
.pointer
12176 || sym
->attr
.in_equivalence
12177 || sym
->attr
.in_common
12180 || sym
->attr
.cray_pointee
12181 || sym
->attr
.cray_pointer
12185 /* Get the appropriate init expression. */
12186 return gfc_build_default_init_expr (&sym
->ts
, &sym
->declared_at
);
12189 /* Add an initialization expression to a local variable. */
12191 apply_default_init_local (gfc_symbol
*sym
)
12193 gfc_expr
*init
= NULL
;
12195 /* The symbol should be a variable or a function return value. */
12196 if ((sym
->attr
.flavor
!= FL_VARIABLE
&& !sym
->attr
.function
)
12197 || (sym
->attr
.function
&& sym
->result
!= sym
))
12200 /* Try to build the initializer expression. If we can't initialize
12201 this symbol, then init will be NULL. */
12202 init
= build_default_init_expr (sym
);
12206 /* For saved variables, we don't want to add an initializer at function
12207 entry, so we just add a static initializer. Note that automatic variables
12208 are stack allocated even with -fno-automatic; we have also to exclude
12209 result variable, which are also nonstatic. */
12210 if (!sym
->attr
.automatic
12211 && (sym
->attr
.save
|| sym
->ns
->save_all
12212 || (flag_max_stack_var_size
== 0 && !sym
->attr
.result
12213 && (sym
->ns
->proc_name
&& !sym
->ns
->proc_name
->attr
.recursive
)
12214 && (!sym
->attr
.dimension
|| !is_non_constant_shape_array (sym
)))))
12216 /* Don't clobber an existing initializer! */
12217 gcc_assert (sym
->value
== NULL
);
12222 build_init_assign (sym
, init
);
12226 /* Resolution of common features of flavors variable and procedure. */
12229 resolve_fl_var_and_proc (gfc_symbol
*sym
, int mp_flag
)
12231 gfc_array_spec
*as
;
12233 if (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
)
12234 as
= CLASS_DATA (sym
)->as
;
12238 /* Constraints on deferred shape variable. */
12239 if (as
== NULL
|| as
->type
!= AS_DEFERRED
)
12241 bool pointer
, allocatable
, dimension
;
12243 if (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
)
12245 pointer
= CLASS_DATA (sym
)->attr
.class_pointer
;
12246 allocatable
= CLASS_DATA (sym
)->attr
.allocatable
;
12247 dimension
= CLASS_DATA (sym
)->attr
.dimension
;
12251 pointer
= sym
->attr
.pointer
&& !sym
->attr
.select_type_temporary
;
12252 allocatable
= sym
->attr
.allocatable
;
12253 dimension
= sym
->attr
.dimension
;
12258 if (dimension
&& as
->type
!= AS_ASSUMED_RANK
)
12260 gfc_error ("Allocatable array %qs at %L must have a deferred "
12261 "shape or assumed rank", sym
->name
, &sym
->declared_at
);
12264 else if (!gfc_notify_std (GFC_STD_F2003
, "Scalar object "
12265 "%qs at %L may not be ALLOCATABLE",
12266 sym
->name
, &sym
->declared_at
))
12270 if (pointer
&& dimension
&& as
->type
!= AS_ASSUMED_RANK
)
12272 gfc_error ("Array pointer %qs at %L must have a deferred shape or "
12273 "assumed rank", sym
->name
, &sym
->declared_at
);
12279 if (!mp_flag
&& !sym
->attr
.allocatable
&& !sym
->attr
.pointer
12280 && sym
->ts
.type
!= BT_CLASS
&& !sym
->assoc
)
12282 gfc_error ("Array %qs at %L cannot have a deferred shape",
12283 sym
->name
, &sym
->declared_at
);
12288 /* Constraints on polymorphic variables. */
12289 if (sym
->ts
.type
== BT_CLASS
&& !(sym
->result
&& sym
->result
!= sym
))
12292 if (sym
->attr
.class_ok
12293 && !sym
->attr
.select_type_temporary
12294 && !UNLIMITED_POLY (sym
)
12295 && !gfc_type_is_extensible (CLASS_DATA (sym
)->ts
.u
.derived
))
12297 gfc_error ("Type %qs of CLASS variable %qs at %L is not extensible",
12298 CLASS_DATA (sym
)->ts
.u
.derived
->name
, sym
->name
,
12299 &sym
->declared_at
);
12304 /* Assume that use associated symbols were checked in the module ns.
12305 Class-variables that are associate-names are also something special
12306 and excepted from the test. */
12307 if (!sym
->attr
.class_ok
&& !sym
->attr
.use_assoc
&& !sym
->assoc
)
12309 gfc_error ("CLASS variable %qs at %L must be dummy, allocatable "
12310 "or pointer", sym
->name
, &sym
->declared_at
);
12319 /* Additional checks for symbols with flavor variable and derived
12320 type. To be called from resolve_fl_variable. */
12323 resolve_fl_variable_derived (gfc_symbol
*sym
, int no_init_flag
)
12325 gcc_assert (sym
->ts
.type
== BT_DERIVED
|| sym
->ts
.type
== BT_CLASS
);
12327 /* Check to see if a derived type is blocked from being host
12328 associated by the presence of another class I symbol in the same
12329 namespace. 14.6.1.3 of the standard and the discussion on
12330 comp.lang.fortran. */
12331 if (sym
->ns
!= sym
->ts
.u
.derived
->ns
12332 && !sym
->ts
.u
.derived
->attr
.use_assoc
12333 && sym
->ns
->proc_name
->attr
.if_source
!= IFSRC_IFBODY
)
12336 gfc_find_symbol (sym
->ts
.u
.derived
->name
, sym
->ns
, 0, &s
);
12337 if (s
&& s
->attr
.generic
)
12338 s
= gfc_find_dt_in_generic (s
);
12339 if (s
&& !gfc_fl_struct (s
->attr
.flavor
))
12341 gfc_error ("The type %qs cannot be host associated at %L "
12342 "because it is blocked by an incompatible object "
12343 "of the same name declared at %L",
12344 sym
->ts
.u
.derived
->name
, &sym
->declared_at
,
12350 /* 4th constraint in section 11.3: "If an object of a type for which
12351 component-initialization is specified (R429) appears in the
12352 specification-part of a module and does not have the ALLOCATABLE
12353 or POINTER attribute, the object shall have the SAVE attribute."
12355 The check for initializers is performed with
12356 gfc_has_default_initializer because gfc_default_initializer generates
12357 a hidden default for allocatable components. */
12358 if (!(sym
->value
|| no_init_flag
) && sym
->ns
->proc_name
12359 && sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
12360 && !(sym
->ns
->save_all
&& !sym
->attr
.automatic
) && !sym
->attr
.save
12361 && !sym
->attr
.pointer
&& !sym
->attr
.allocatable
12362 && gfc_has_default_initializer (sym
->ts
.u
.derived
)
12363 && !gfc_notify_std (GFC_STD_F2008
, "Implied SAVE for module variable "
12364 "%qs at %L, needed due to the default "
12365 "initialization", sym
->name
, &sym
->declared_at
))
12368 /* Assign default initializer. */
12369 if (!(sym
->value
|| sym
->attr
.pointer
|| sym
->attr
.allocatable
)
12370 && (!no_init_flag
|| sym
->attr
.intent
== INTENT_OUT
))
12371 sym
->value
= gfc_generate_initializer (&sym
->ts
, can_generate_init (sym
));
12377 /* F2008, C402 (R401): A colon shall not be used as a type-param-value
12378 except in the declaration of an entity or component that has the POINTER
12379 or ALLOCATABLE attribute. */
12382 deferred_requirements (gfc_symbol
*sym
)
12384 if (sym
->ts
.deferred
12385 && !(sym
->attr
.pointer
12386 || sym
->attr
.allocatable
12387 || sym
->attr
.associate_var
12388 || sym
->attr
.omp_udr_artificial_var
))
12390 /* If a function has a result variable, only check the variable. */
12391 if (sym
->result
&& sym
->name
!= sym
->result
->name
)
12394 gfc_error ("Entity %qs at %L has a deferred type parameter and "
12395 "requires either the POINTER or ALLOCATABLE attribute",
12396 sym
->name
, &sym
->declared_at
);
12403 /* Resolve symbols with flavor variable. */
12406 resolve_fl_variable (gfc_symbol
*sym
, int mp_flag
)
12408 const char *auto_save_msg
= "Automatic object %qs at %L cannot have the "
12411 if (!resolve_fl_var_and_proc (sym
, mp_flag
))
12414 /* Set this flag to check that variables are parameters of all entries.
12415 This check is effected by the call to gfc_resolve_expr through
12416 is_non_constant_shape_array. */
12417 bool saved_specification_expr
= specification_expr
;
12418 specification_expr
= true;
12420 if (sym
->ns
->proc_name
12421 && (sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
12422 || sym
->ns
->proc_name
->attr
.is_main_program
)
12423 && !sym
->attr
.use_assoc
12424 && !sym
->attr
.allocatable
12425 && !sym
->attr
.pointer
12426 && is_non_constant_shape_array (sym
))
12428 /* F08:C541. The shape of an array defined in a main program or module
12429 * needs to be constant. */
12430 gfc_error ("The module or main program array %qs at %L must "
12431 "have constant shape", sym
->name
, &sym
->declared_at
);
12432 specification_expr
= saved_specification_expr
;
12436 /* Constraints on deferred type parameter. */
12437 if (!deferred_requirements (sym
))
12440 if (sym
->ts
.type
== BT_CHARACTER
&& !sym
->attr
.associate_var
)
12442 /* Make sure that character string variables with assumed length are
12443 dummy arguments. */
12444 gfc_expr
*e
= NULL
;
12447 e
= sym
->ts
.u
.cl
->length
;
12451 if (e
== NULL
&& !sym
->attr
.dummy
&& !sym
->attr
.result
12452 && !sym
->ts
.deferred
&& !sym
->attr
.select_type_temporary
12453 && !sym
->attr
.omp_udr_artificial_var
)
12455 gfc_error ("Entity with assumed character length at %L must be a "
12456 "dummy argument or a PARAMETER", &sym
->declared_at
);
12457 specification_expr
= saved_specification_expr
;
12461 if (e
&& sym
->attr
.save
== SAVE_EXPLICIT
&& !gfc_is_constant_expr (e
))
12463 gfc_error (auto_save_msg
, sym
->name
, &sym
->declared_at
);
12464 specification_expr
= saved_specification_expr
;
12468 if (!gfc_is_constant_expr (e
)
12469 && !(e
->expr_type
== EXPR_VARIABLE
12470 && e
->symtree
->n
.sym
->attr
.flavor
== FL_PARAMETER
))
12472 if (!sym
->attr
.use_assoc
&& sym
->ns
->proc_name
12473 && (sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
12474 || sym
->ns
->proc_name
->attr
.is_main_program
))
12476 gfc_error ("%qs at %L must have constant character length "
12477 "in this context", sym
->name
, &sym
->declared_at
);
12478 specification_expr
= saved_specification_expr
;
12481 if (sym
->attr
.in_common
)
12483 gfc_error ("COMMON variable %qs at %L must have constant "
12484 "character length", sym
->name
, &sym
->declared_at
);
12485 specification_expr
= saved_specification_expr
;
12491 if (sym
->value
== NULL
&& sym
->attr
.referenced
)
12492 apply_default_init_local (sym
); /* Try to apply a default initialization. */
12494 /* Determine if the symbol may not have an initializer. */
12495 int no_init_flag
= 0, automatic_flag
= 0;
12496 if (sym
->attr
.allocatable
|| sym
->attr
.external
|| sym
->attr
.dummy
12497 || sym
->attr
.intrinsic
|| sym
->attr
.result
)
12499 else if ((sym
->attr
.dimension
|| sym
->attr
.codimension
) && !sym
->attr
.pointer
12500 && is_non_constant_shape_array (sym
))
12502 no_init_flag
= automatic_flag
= 1;
12504 /* Also, they must not have the SAVE attribute.
12505 SAVE_IMPLICIT is checked below. */
12506 if (sym
->as
&& sym
->attr
.codimension
)
12508 int corank
= sym
->as
->corank
;
12509 sym
->as
->corank
= 0;
12510 no_init_flag
= automatic_flag
= is_non_constant_shape_array (sym
);
12511 sym
->as
->corank
= corank
;
12513 if (automatic_flag
&& sym
->attr
.save
== SAVE_EXPLICIT
)
12515 gfc_error (auto_save_msg
, sym
->name
, &sym
->declared_at
);
12516 specification_expr
= saved_specification_expr
;
12521 /* Ensure that any initializer is simplified. */
12523 gfc_simplify_expr (sym
->value
, 1);
12525 /* Reject illegal initializers. */
12526 if (!sym
->mark
&& sym
->value
)
12528 if (sym
->attr
.allocatable
|| (sym
->ts
.type
== BT_CLASS
12529 && CLASS_DATA (sym
)->attr
.allocatable
))
12530 gfc_error ("Allocatable %qs at %L cannot have an initializer",
12531 sym
->name
, &sym
->declared_at
);
12532 else if (sym
->attr
.external
)
12533 gfc_error ("External %qs at %L cannot have an initializer",
12534 sym
->name
, &sym
->declared_at
);
12535 else if (sym
->attr
.dummy
12536 && !(sym
->ts
.type
== BT_DERIVED
&& sym
->attr
.intent
== INTENT_OUT
))
12537 gfc_error ("Dummy %qs at %L cannot have an initializer",
12538 sym
->name
, &sym
->declared_at
);
12539 else if (sym
->attr
.intrinsic
)
12540 gfc_error ("Intrinsic %qs at %L cannot have an initializer",
12541 sym
->name
, &sym
->declared_at
);
12542 else if (sym
->attr
.result
)
12543 gfc_error ("Function result %qs at %L cannot have an initializer",
12544 sym
->name
, &sym
->declared_at
);
12545 else if (automatic_flag
)
12546 gfc_error ("Automatic array %qs at %L cannot have an initializer",
12547 sym
->name
, &sym
->declared_at
);
12549 goto no_init_error
;
12550 specification_expr
= saved_specification_expr
;
12555 if (sym
->ts
.type
== BT_DERIVED
|| sym
->ts
.type
== BT_CLASS
)
12557 bool res
= resolve_fl_variable_derived (sym
, no_init_flag
);
12558 specification_expr
= saved_specification_expr
;
12562 specification_expr
= saved_specification_expr
;
12567 /* Compare the dummy characteristics of a module procedure interface
12568 declaration with the corresponding declaration in a submodule. */
12569 static gfc_formal_arglist
*new_formal
;
12570 static char errmsg
[200];
12573 compare_fsyms (gfc_symbol
*sym
)
12577 if (sym
== NULL
|| new_formal
== NULL
)
12580 fsym
= new_formal
->sym
;
12585 if (strcmp (sym
->name
, fsym
->name
) == 0)
12587 if (!gfc_check_dummy_characteristics (fsym
, sym
, true, errmsg
, 200))
12588 gfc_error ("%s at %L", errmsg
, &fsym
->declared_at
);
12593 /* Resolve a procedure. */
12596 resolve_fl_procedure (gfc_symbol
*sym
, int mp_flag
)
12598 gfc_formal_arglist
*arg
;
12600 if (sym
->attr
.function
12601 && !resolve_fl_var_and_proc (sym
, mp_flag
))
12604 /* Constraints on deferred type parameter. */
12605 if (!deferred_requirements (sym
))
12608 if (sym
->ts
.type
== BT_CHARACTER
)
12610 gfc_charlen
*cl
= sym
->ts
.u
.cl
;
12612 if (cl
&& cl
->length
&& gfc_is_constant_expr (cl
->length
)
12613 && !resolve_charlen (cl
))
12616 if ((!cl
|| !cl
->length
|| cl
->length
->expr_type
!= EXPR_CONSTANT
)
12617 && sym
->attr
.proc
== PROC_ST_FUNCTION
)
12619 gfc_error ("Character-valued statement function %qs at %L must "
12620 "have constant length", sym
->name
, &sym
->declared_at
);
12625 /* Ensure that derived type for are not of a private type. Internal
12626 module procedures are excluded by 2.2.3.3 - i.e., they are not
12627 externally accessible and can access all the objects accessible in
12629 if (!(sym
->ns
->parent
&& sym
->ns
->parent
->proc_name
12630 && sym
->ns
->parent
->proc_name
->attr
.flavor
== FL_MODULE
)
12631 && gfc_check_symbol_access (sym
))
12633 gfc_interface
*iface
;
12635 for (arg
= gfc_sym_get_dummy_args (sym
); arg
; arg
= arg
->next
)
12638 && arg
->sym
->ts
.type
== BT_DERIVED
12639 && !arg
->sym
->ts
.u
.derived
->attr
.use_assoc
12640 && !gfc_check_symbol_access (arg
->sym
->ts
.u
.derived
)
12641 && !gfc_notify_std (GFC_STD_F2003
, "%qs is of a PRIVATE type "
12642 "and cannot be a dummy argument"
12643 " of %qs, which is PUBLIC at %L",
12644 arg
->sym
->name
, sym
->name
,
12645 &sym
->declared_at
))
12647 /* Stop this message from recurring. */
12648 arg
->sym
->ts
.u
.derived
->attr
.access
= ACCESS_PUBLIC
;
12653 /* PUBLIC interfaces may expose PRIVATE procedures that take types
12654 PRIVATE to the containing module. */
12655 for (iface
= sym
->generic
; iface
; iface
= iface
->next
)
12657 for (arg
= gfc_sym_get_dummy_args (iface
->sym
); arg
; arg
= arg
->next
)
12660 && arg
->sym
->ts
.type
== BT_DERIVED
12661 && !arg
->sym
->ts
.u
.derived
->attr
.use_assoc
12662 && !gfc_check_symbol_access (arg
->sym
->ts
.u
.derived
)
12663 && !gfc_notify_std (GFC_STD_F2003
, "Procedure %qs in "
12664 "PUBLIC interface %qs at %L "
12665 "takes dummy arguments of %qs which "
12666 "is PRIVATE", iface
->sym
->name
,
12667 sym
->name
, &iface
->sym
->declared_at
,
12668 gfc_typename(&arg
->sym
->ts
)))
12670 /* Stop this message from recurring. */
12671 arg
->sym
->ts
.u
.derived
->attr
.access
= ACCESS_PUBLIC
;
12678 if (sym
->attr
.function
&& sym
->value
&& sym
->attr
.proc
!= PROC_ST_FUNCTION
12679 && !sym
->attr
.proc_pointer
)
12681 gfc_error ("Function %qs at %L cannot have an initializer",
12682 sym
->name
, &sym
->declared_at
);
12684 /* Make sure no second error is issued for this. */
12685 sym
->value
->error
= 1;
12689 /* An external symbol may not have an initializer because it is taken to be
12690 a procedure. Exception: Procedure Pointers. */
12691 if (sym
->attr
.external
&& sym
->value
&& !sym
->attr
.proc_pointer
)
12693 gfc_error ("External object %qs at %L may not have an initializer",
12694 sym
->name
, &sym
->declared_at
);
12698 /* An elemental function is required to return a scalar 12.7.1 */
12699 if (sym
->attr
.elemental
&& sym
->attr
.function
12700 && (sym
->as
|| (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
)->as
)))
12702 gfc_error ("ELEMENTAL function %qs at %L must have a scalar "
12703 "result", sym
->name
, &sym
->declared_at
);
12704 /* Reset so that the error only occurs once. */
12705 sym
->attr
.elemental
= 0;
12709 if (sym
->attr
.proc
== PROC_ST_FUNCTION
12710 && (sym
->attr
.allocatable
|| sym
->attr
.pointer
))
12712 gfc_error ("Statement function %qs at %L may not have pointer or "
12713 "allocatable attribute", sym
->name
, &sym
->declared_at
);
12717 /* 5.1.1.5 of the Standard: A function name declared with an asterisk
12718 char-len-param shall not be array-valued, pointer-valued, recursive
12719 or pure. ....snip... A character value of * may only be used in the
12720 following ways: (i) Dummy arg of procedure - dummy associates with
12721 actual length; (ii) To declare a named constant; or (iii) External
12722 function - but length must be declared in calling scoping unit. */
12723 if (sym
->attr
.function
12724 && sym
->ts
.type
== BT_CHARACTER
&& !sym
->ts
.deferred
12725 && sym
->ts
.u
.cl
&& sym
->ts
.u
.cl
->length
== NULL
)
12727 if ((sym
->as
&& sym
->as
->rank
) || (sym
->attr
.pointer
)
12728 || (sym
->attr
.recursive
) || (sym
->attr
.pure
))
12730 if (sym
->as
&& sym
->as
->rank
)
12731 gfc_error ("CHARACTER(*) function %qs at %L cannot be "
12732 "array-valued", sym
->name
, &sym
->declared_at
);
12734 if (sym
->attr
.pointer
)
12735 gfc_error ("CHARACTER(*) function %qs at %L cannot be "
12736 "pointer-valued", sym
->name
, &sym
->declared_at
);
12738 if (sym
->attr
.pure
)
12739 gfc_error ("CHARACTER(*) function %qs at %L cannot be "
12740 "pure", sym
->name
, &sym
->declared_at
);
12742 if (sym
->attr
.recursive
)
12743 gfc_error ("CHARACTER(*) function %qs at %L cannot be "
12744 "recursive", sym
->name
, &sym
->declared_at
);
12749 /* Appendix B.2 of the standard. Contained functions give an
12750 error anyway. Deferred character length is an F2003 feature.
12751 Don't warn on intrinsic conversion functions, which start
12752 with two underscores. */
12753 if (!sym
->attr
.contained
&& !sym
->ts
.deferred
12754 && (sym
->name
[0] != '_' || sym
->name
[1] != '_'))
12755 gfc_notify_std (GFC_STD_F95_OBS
,
12756 "CHARACTER(*) function %qs at %L",
12757 sym
->name
, &sym
->declared_at
);
12760 /* F2008, C1218. */
12761 if (sym
->attr
.elemental
)
12763 if (sym
->attr
.proc_pointer
)
12765 gfc_error ("Procedure pointer %qs at %L shall not be elemental",
12766 sym
->name
, &sym
->declared_at
);
12769 if (sym
->attr
.dummy
)
12771 gfc_error ("Dummy procedure %qs at %L shall not be elemental",
12772 sym
->name
, &sym
->declared_at
);
12777 /* F2018, C15100: "The result of an elemental function shall be scalar,
12778 and shall not have the POINTER or ALLOCATABLE attribute." The scalar
12779 pointer is tested and caught elsewhere. */
12780 if (sym
->attr
.elemental
&& sym
->result
12781 && (sym
->result
->attr
.allocatable
|| sym
->result
->attr
.pointer
))
12783 gfc_error ("Function result variable %qs at %L of elemental "
12784 "function %qs shall not have an ALLOCATABLE or POINTER "
12785 "attribute", sym
->result
->name
,
12786 &sym
->result
->declared_at
, sym
->name
);
12790 if (sym
->attr
.is_bind_c
&& sym
->attr
.is_c_interop
!= 1)
12792 gfc_formal_arglist
*curr_arg
;
12793 int has_non_interop_arg
= 0;
12795 if (!verify_bind_c_sym (sym
, &(sym
->ts
), sym
->attr
.in_common
,
12796 sym
->common_block
))
12798 /* Clear these to prevent looking at them again if there was an
12800 sym
->attr
.is_bind_c
= 0;
12801 sym
->attr
.is_c_interop
= 0;
12802 sym
->ts
.is_c_interop
= 0;
12806 /* So far, no errors have been found. */
12807 sym
->attr
.is_c_interop
= 1;
12808 sym
->ts
.is_c_interop
= 1;
12811 curr_arg
= gfc_sym_get_dummy_args (sym
);
12812 while (curr_arg
!= NULL
)
12814 /* Skip implicitly typed dummy args here. */
12815 if (curr_arg
->sym
&& curr_arg
->sym
->attr
.implicit_type
== 0)
12816 if (!gfc_verify_c_interop_param (curr_arg
->sym
))
12817 /* If something is found to fail, record the fact so we
12818 can mark the symbol for the procedure as not being
12819 BIND(C) to try and prevent multiple errors being
12821 has_non_interop_arg
= 1;
12823 curr_arg
= curr_arg
->next
;
12826 /* See if any of the arguments were not interoperable and if so, clear
12827 the procedure symbol to prevent duplicate error messages. */
12828 if (has_non_interop_arg
!= 0)
12830 sym
->attr
.is_c_interop
= 0;
12831 sym
->ts
.is_c_interop
= 0;
12832 sym
->attr
.is_bind_c
= 0;
12836 if (!sym
->attr
.proc_pointer
)
12838 if (sym
->attr
.save
== SAVE_EXPLICIT
)
12840 gfc_error ("PROCEDURE attribute conflicts with SAVE attribute "
12841 "in %qs at %L", sym
->name
, &sym
->declared_at
);
12844 if (sym
->attr
.intent
)
12846 gfc_error ("PROCEDURE attribute conflicts with INTENT attribute "
12847 "in %qs at %L", sym
->name
, &sym
->declared_at
);
12850 if (sym
->attr
.subroutine
&& sym
->attr
.result
)
12852 gfc_error ("PROCEDURE attribute conflicts with RESULT attribute "
12853 "in %qs at %L", sym
->name
, &sym
->declared_at
);
12856 if (sym
->attr
.external
&& sym
->attr
.function
&& !sym
->attr
.module_procedure
12857 && ((sym
->attr
.if_source
== IFSRC_DECL
&& !sym
->attr
.procedure
)
12858 || sym
->attr
.contained
))
12860 gfc_error ("EXTERNAL attribute conflicts with FUNCTION attribute "
12861 "in %qs at %L", sym
->name
, &sym
->declared_at
);
12864 if (strcmp ("ppr@", sym
->name
) == 0)
12866 gfc_error ("Procedure pointer result %qs at %L "
12867 "is missing the pointer attribute",
12868 sym
->ns
->proc_name
->name
, &sym
->declared_at
);
12873 /* Assume that a procedure whose body is not known has references
12874 to external arrays. */
12875 if (sym
->attr
.if_source
!= IFSRC_DECL
)
12876 sym
->attr
.array_outer_dependency
= 1;
12878 /* Compare the characteristics of a module procedure with the
12879 interface declaration. Ideally this would be done with
12880 gfc_compare_interfaces but, at present, the formal interface
12881 cannot be copied to the ts.interface. */
12882 if (sym
->attr
.module_procedure
12883 && sym
->attr
.if_source
== IFSRC_DECL
)
12886 char name
[2*GFC_MAX_SYMBOL_LEN
+ 1];
12888 char *submodule_name
;
12889 strcpy (name
, sym
->ns
->proc_name
->name
);
12890 module_name
= strtok (name
, ".");
12891 submodule_name
= strtok (NULL
, ".");
12893 iface
= sym
->tlink
;
12896 /* Make sure that the result uses the correct charlen for deferred
12898 if (iface
&& sym
->result
12899 && iface
->ts
.type
== BT_CHARACTER
12900 && iface
->ts
.deferred
)
12901 sym
->result
->ts
.u
.cl
= iface
->ts
.u
.cl
;
12906 /* Check the procedure characteristics. */
12907 if (sym
->attr
.elemental
!= iface
->attr
.elemental
)
12909 gfc_error ("Mismatch in ELEMENTAL attribute between MODULE "
12910 "PROCEDURE at %L and its interface in %s",
12911 &sym
->declared_at
, module_name
);
12915 if (sym
->attr
.pure
!= iface
->attr
.pure
)
12917 gfc_error ("Mismatch in PURE attribute between MODULE "
12918 "PROCEDURE at %L and its interface in %s",
12919 &sym
->declared_at
, module_name
);
12923 if (sym
->attr
.recursive
!= iface
->attr
.recursive
)
12925 gfc_error ("Mismatch in RECURSIVE attribute between MODULE "
12926 "PROCEDURE at %L and its interface in %s",
12927 &sym
->declared_at
, module_name
);
12931 /* Check the result characteristics. */
12932 if (!gfc_check_result_characteristics (sym
, iface
, errmsg
, 200))
12934 gfc_error ("%s between the MODULE PROCEDURE declaration "
12935 "in MODULE %qs and the declaration at %L in "
12937 errmsg
, module_name
, &sym
->declared_at
,
12938 submodule_name
? submodule_name
: module_name
);
12943 /* Check the characteristics of the formal arguments. */
12944 if (sym
->formal
&& sym
->formal_ns
)
12946 for (arg
= sym
->formal
; arg
&& arg
->sym
; arg
= arg
->next
)
12949 gfc_traverse_ns (sym
->formal_ns
, compare_fsyms
);
12957 /* Resolve a list of finalizer procedures. That is, after they have hopefully
12958 been defined and we now know their defined arguments, check that they fulfill
12959 the requirements of the standard for procedures used as finalizers. */
12962 gfc_resolve_finalizers (gfc_symbol
* derived
, bool *finalizable
)
12964 gfc_finalizer
* list
;
12965 gfc_finalizer
** prev_link
; /* For removing wrong entries from the list. */
12966 bool result
= true;
12967 bool seen_scalar
= false;
12970 gfc_symbol
*parent
= gfc_get_derived_super_type (derived
);
12973 gfc_resolve_finalizers (parent
, finalizable
);
12975 /* Ensure that derived-type components have a their finalizers resolved. */
12976 bool has_final
= derived
->f2k_derived
&& derived
->f2k_derived
->finalizers
;
12977 for (c
= derived
->components
; c
; c
= c
->next
)
12978 if (c
->ts
.type
== BT_DERIVED
12979 && !c
->attr
.pointer
&& !c
->attr
.proc_pointer
&& !c
->attr
.allocatable
)
12981 bool has_final2
= false;
12982 if (!gfc_resolve_finalizers (c
->ts
.u
.derived
, &has_final2
))
12983 return false; /* Error. */
12984 has_final
= has_final
|| has_final2
;
12986 /* Return early if not finalizable. */
12990 *finalizable
= false;
12994 /* Walk over the list of finalizer-procedures, check them, and if any one
12995 does not fit in with the standard's definition, print an error and remove
12996 it from the list. */
12997 prev_link
= &derived
->f2k_derived
->finalizers
;
12998 for (list
= derived
->f2k_derived
->finalizers
; list
; list
= *prev_link
)
13000 gfc_formal_arglist
*dummy_args
;
13005 /* Skip this finalizer if we already resolved it. */
13006 if (list
->proc_tree
)
13008 if (list
->proc_tree
->n
.sym
->formal
->sym
->as
== NULL
13009 || list
->proc_tree
->n
.sym
->formal
->sym
->as
->rank
== 0)
13010 seen_scalar
= true;
13011 prev_link
= &(list
->next
);
13015 /* Check this exists and is a SUBROUTINE. */
13016 if (!list
->proc_sym
->attr
.subroutine
)
13018 gfc_error ("FINAL procedure %qs at %L is not a SUBROUTINE",
13019 list
->proc_sym
->name
, &list
->where
);
13023 /* We should have exactly one argument. */
13024 dummy_args
= gfc_sym_get_dummy_args (list
->proc_sym
);
13025 if (!dummy_args
|| dummy_args
->next
)
13027 gfc_error ("FINAL procedure at %L must have exactly one argument",
13031 arg
= dummy_args
->sym
;
13033 /* This argument must be of our type. */
13034 if (arg
->ts
.type
!= BT_DERIVED
|| arg
->ts
.u
.derived
!= derived
)
13036 gfc_error ("Argument of FINAL procedure at %L must be of type %qs",
13037 &arg
->declared_at
, derived
->name
);
13041 /* It must neither be a pointer nor allocatable nor optional. */
13042 if (arg
->attr
.pointer
)
13044 gfc_error ("Argument of FINAL procedure at %L must not be a POINTER",
13045 &arg
->declared_at
);
13048 if (arg
->attr
.allocatable
)
13050 gfc_error ("Argument of FINAL procedure at %L must not be"
13051 " ALLOCATABLE", &arg
->declared_at
);
13054 if (arg
->attr
.optional
)
13056 gfc_error ("Argument of FINAL procedure at %L must not be OPTIONAL",
13057 &arg
->declared_at
);
13061 /* It must not be INTENT(OUT). */
13062 if (arg
->attr
.intent
== INTENT_OUT
)
13064 gfc_error ("Argument of FINAL procedure at %L must not be"
13065 " INTENT(OUT)", &arg
->declared_at
);
13069 /* Warn if the procedure is non-scalar and not assumed shape. */
13070 if (warn_surprising
&& arg
->as
&& arg
->as
->rank
!= 0
13071 && arg
->as
->type
!= AS_ASSUMED_SHAPE
)
13072 gfc_warning (OPT_Wsurprising
,
13073 "Non-scalar FINAL procedure at %L should have assumed"
13074 " shape argument", &arg
->declared_at
);
13076 /* Check that it does not match in kind and rank with a FINAL procedure
13077 defined earlier. To really loop over the *earlier* declarations,
13078 we need to walk the tail of the list as new ones were pushed at the
13080 /* TODO: Handle kind parameters once they are implemented. */
13081 my_rank
= (arg
->as
? arg
->as
->rank
: 0);
13082 for (i
= list
->next
; i
; i
= i
->next
)
13084 gfc_formal_arglist
*dummy_args
;
13086 /* Argument list might be empty; that is an error signalled earlier,
13087 but we nevertheless continued resolving. */
13088 dummy_args
= gfc_sym_get_dummy_args (i
->proc_sym
);
13091 gfc_symbol
* i_arg
= dummy_args
->sym
;
13092 const int i_rank
= (i_arg
->as
? i_arg
->as
->rank
: 0);
13093 if (i_rank
== my_rank
)
13095 gfc_error ("FINAL procedure %qs declared at %L has the same"
13096 " rank (%d) as %qs",
13097 list
->proc_sym
->name
, &list
->where
, my_rank
,
13098 i
->proc_sym
->name
);
13104 /* Is this the/a scalar finalizer procedure? */
13106 seen_scalar
= true;
13108 /* Find the symtree for this procedure. */
13109 gcc_assert (!list
->proc_tree
);
13110 list
->proc_tree
= gfc_find_sym_in_symtree (list
->proc_sym
);
13112 prev_link
= &list
->next
;
13115 /* Remove wrong nodes immediately from the list so we don't risk any
13116 troubles in the future when they might fail later expectations. */
13119 *prev_link
= list
->next
;
13120 gfc_free_finalizer (i
);
13124 if (result
== false)
13127 /* Warn if we haven't seen a scalar finalizer procedure (but we know there
13128 were nodes in the list, must have been for arrays. It is surely a good
13129 idea to have a scalar version there if there's something to finalize. */
13130 if (warn_surprising
&& derived
->f2k_derived
->finalizers
&& !seen_scalar
)
13131 gfc_warning (OPT_Wsurprising
,
13132 "Only array FINAL procedures declared for derived type %qs"
13133 " defined at %L, suggest also scalar one",
13134 derived
->name
, &derived
->declared_at
);
13136 vtab
= gfc_find_derived_vtab (derived
);
13137 c
= vtab
->ts
.u
.derived
->components
->next
->next
->next
->next
->next
;
13138 gfc_set_sym_referenced (c
->initializer
->symtree
->n
.sym
);
13141 *finalizable
= true;
13147 /* Check if two GENERIC targets are ambiguous and emit an error is they are. */
13150 check_generic_tbp_ambiguity (gfc_tbp_generic
* t1
, gfc_tbp_generic
* t2
,
13151 const char* generic_name
, locus where
)
13153 gfc_symbol
*sym1
, *sym2
;
13154 const char *pass1
, *pass2
;
13155 gfc_formal_arglist
*dummy_args
;
13157 gcc_assert (t1
->specific
&& t2
->specific
);
13158 gcc_assert (!t1
->specific
->is_generic
);
13159 gcc_assert (!t2
->specific
->is_generic
);
13160 gcc_assert (t1
->is_operator
== t2
->is_operator
);
13162 sym1
= t1
->specific
->u
.specific
->n
.sym
;
13163 sym2
= t2
->specific
->u
.specific
->n
.sym
;
13168 /* Both must be SUBROUTINEs or both must be FUNCTIONs. */
13169 if (sym1
->attr
.subroutine
!= sym2
->attr
.subroutine
13170 || sym1
->attr
.function
!= sym2
->attr
.function
)
13172 gfc_error ("%qs and %qs cannot be mixed FUNCTION/SUBROUTINE for"
13173 " GENERIC %qs at %L",
13174 sym1
->name
, sym2
->name
, generic_name
, &where
);
13178 /* Determine PASS arguments. */
13179 if (t1
->specific
->nopass
)
13181 else if (t1
->specific
->pass_arg
)
13182 pass1
= t1
->specific
->pass_arg
;
13185 dummy_args
= gfc_sym_get_dummy_args (t1
->specific
->u
.specific
->n
.sym
);
13187 pass1
= dummy_args
->sym
->name
;
13191 if (t2
->specific
->nopass
)
13193 else if (t2
->specific
->pass_arg
)
13194 pass2
= t2
->specific
->pass_arg
;
13197 dummy_args
= gfc_sym_get_dummy_args (t2
->specific
->u
.specific
->n
.sym
);
13199 pass2
= dummy_args
->sym
->name
;
13204 /* Compare the interfaces. */
13205 if (gfc_compare_interfaces (sym1
, sym2
, sym2
->name
, !t1
->is_operator
, 0,
13206 NULL
, 0, pass1
, pass2
))
13208 gfc_error ("%qs and %qs for GENERIC %qs at %L are ambiguous",
13209 sym1
->name
, sym2
->name
, generic_name
, &where
);
13217 /* Worker function for resolving a generic procedure binding; this is used to
13218 resolve GENERIC as well as user and intrinsic OPERATOR typebound procedures.
13220 The difference between those cases is finding possible inherited bindings
13221 that are overridden, as one has to look for them in tb_sym_root,
13222 tb_uop_root or tb_op, respectively. Thus the caller must already find
13223 the super-type and set p->overridden correctly. */
13226 resolve_tb_generic_targets (gfc_symbol
* super_type
,
13227 gfc_typebound_proc
* p
, const char* name
)
13229 gfc_tbp_generic
* target
;
13230 gfc_symtree
* first_target
;
13231 gfc_symtree
* inherited
;
13233 gcc_assert (p
&& p
->is_generic
);
13235 /* Try to find the specific bindings for the symtrees in our target-list. */
13236 gcc_assert (p
->u
.generic
);
13237 for (target
= p
->u
.generic
; target
; target
= target
->next
)
13238 if (!target
->specific
)
13240 gfc_typebound_proc
* overridden_tbp
;
13241 gfc_tbp_generic
* g
;
13242 const char* target_name
;
13244 target_name
= target
->specific_st
->name
;
13246 /* Defined for this type directly. */
13247 if (target
->specific_st
->n
.tb
&& !target
->specific_st
->n
.tb
->error
)
13249 target
->specific
= target
->specific_st
->n
.tb
;
13250 goto specific_found
;
13253 /* Look for an inherited specific binding. */
13256 inherited
= gfc_find_typebound_proc (super_type
, NULL
, target_name
,
13261 gcc_assert (inherited
->n
.tb
);
13262 target
->specific
= inherited
->n
.tb
;
13263 goto specific_found
;
13267 gfc_error ("Undefined specific binding %qs as target of GENERIC %qs"
13268 " at %L", target_name
, name
, &p
->where
);
13271 /* Once we've found the specific binding, check it is not ambiguous with
13272 other specifics already found or inherited for the same GENERIC. */
13274 gcc_assert (target
->specific
);
13276 /* This must really be a specific binding! */
13277 if (target
->specific
->is_generic
)
13279 gfc_error ("GENERIC %qs at %L must target a specific binding,"
13280 " %qs is GENERIC, too", name
, &p
->where
, target_name
);
13284 /* Check those already resolved on this type directly. */
13285 for (g
= p
->u
.generic
; g
; g
= g
->next
)
13286 if (g
!= target
&& g
->specific
13287 && !check_generic_tbp_ambiguity (target
, g
, name
, p
->where
))
13290 /* Check for ambiguity with inherited specific targets. */
13291 for (overridden_tbp
= p
->overridden
; overridden_tbp
;
13292 overridden_tbp
= overridden_tbp
->overridden
)
13293 if (overridden_tbp
->is_generic
)
13295 for (g
= overridden_tbp
->u
.generic
; g
; g
= g
->next
)
13297 gcc_assert (g
->specific
);
13298 if (!check_generic_tbp_ambiguity (target
, g
, name
, p
->where
))
13304 /* If we attempt to "overwrite" a specific binding, this is an error. */
13305 if (p
->overridden
&& !p
->overridden
->is_generic
)
13307 gfc_error ("GENERIC %qs at %L cannot overwrite specific binding with"
13308 " the same name", name
, &p
->where
);
13312 /* Take the SUBROUTINE/FUNCTION attributes of the first specific target, as
13313 all must have the same attributes here. */
13314 first_target
= p
->u
.generic
->specific
->u
.specific
;
13315 gcc_assert (first_target
);
13316 p
->subroutine
= first_target
->n
.sym
->attr
.subroutine
;
13317 p
->function
= first_target
->n
.sym
->attr
.function
;
13323 /* Resolve a GENERIC procedure binding for a derived type. */
13326 resolve_typebound_generic (gfc_symbol
* derived
, gfc_symtree
* st
)
13328 gfc_symbol
* super_type
;
13330 /* Find the overridden binding if any. */
13331 st
->n
.tb
->overridden
= NULL
;
13332 super_type
= gfc_get_derived_super_type (derived
);
13335 gfc_symtree
* overridden
;
13336 overridden
= gfc_find_typebound_proc (super_type
, NULL
, st
->name
,
13339 if (overridden
&& overridden
->n
.tb
)
13340 st
->n
.tb
->overridden
= overridden
->n
.tb
;
13343 /* Resolve using worker function. */
13344 return resolve_tb_generic_targets (super_type
, st
->n
.tb
, st
->name
);
13348 /* Retrieve the target-procedure of an operator binding and do some checks in
13349 common for intrinsic and user-defined type-bound operators. */
13352 get_checked_tb_operator_target (gfc_tbp_generic
* target
, locus where
)
13354 gfc_symbol
* target_proc
;
13356 gcc_assert (target
->specific
&& !target
->specific
->is_generic
);
13357 target_proc
= target
->specific
->u
.specific
->n
.sym
;
13358 gcc_assert (target_proc
);
13360 /* F08:C468. All operator bindings must have a passed-object dummy argument. */
13361 if (target
->specific
->nopass
)
13363 gfc_error ("Type-bound operator at %L cannot be NOPASS", &where
);
13367 return target_proc
;
13371 /* Resolve a type-bound intrinsic operator. */
13374 resolve_typebound_intrinsic_op (gfc_symbol
* derived
, gfc_intrinsic_op op
,
13375 gfc_typebound_proc
* p
)
13377 gfc_symbol
* super_type
;
13378 gfc_tbp_generic
* target
;
13380 /* If there's already an error here, do nothing (but don't fail again). */
13384 /* Operators should always be GENERIC bindings. */
13385 gcc_assert (p
->is_generic
);
13387 /* Look for an overridden binding. */
13388 super_type
= gfc_get_derived_super_type (derived
);
13389 if (super_type
&& super_type
->f2k_derived
)
13390 p
->overridden
= gfc_find_typebound_intrinsic_op (super_type
, NULL
,
13393 p
->overridden
= NULL
;
13395 /* Resolve general GENERIC properties using worker function. */
13396 if (!resolve_tb_generic_targets (super_type
, p
, gfc_op2string(op
)))
13399 /* Check the targets to be procedures of correct interface. */
13400 for (target
= p
->u
.generic
; target
; target
= target
->next
)
13402 gfc_symbol
* target_proc
;
13404 target_proc
= get_checked_tb_operator_target (target
, p
->where
);
13408 if (!gfc_check_operator_interface (target_proc
, op
, p
->where
))
13411 /* Add target to non-typebound operator list. */
13412 if (!target
->specific
->deferred
&& !derived
->attr
.use_assoc
13413 && p
->access
!= ACCESS_PRIVATE
&& derived
->ns
== gfc_current_ns
)
13415 gfc_interface
*head
, *intr
;
13417 /* Preempt 'gfc_check_new_interface' for submodules, where the
13418 mechanism for handling module procedures winds up resolving
13419 operator interfaces twice and would otherwise cause an error. */
13420 for (intr
= derived
->ns
->op
[op
]; intr
; intr
= intr
->next
)
13421 if (intr
->sym
== target_proc
13422 && target_proc
->attr
.used_in_submodule
)
13425 if (!gfc_check_new_interface (derived
->ns
->op
[op
],
13426 target_proc
, p
->where
))
13428 head
= derived
->ns
->op
[op
];
13429 intr
= gfc_get_interface ();
13430 intr
->sym
= target_proc
;
13431 intr
->where
= p
->where
;
13433 derived
->ns
->op
[op
] = intr
;
13445 /* Resolve a type-bound user operator (tree-walker callback). */
13447 static gfc_symbol
* resolve_bindings_derived
;
13448 static bool resolve_bindings_result
;
13450 static bool check_uop_procedure (gfc_symbol
* sym
, locus where
);
13453 resolve_typebound_user_op (gfc_symtree
* stree
)
13455 gfc_symbol
* super_type
;
13456 gfc_tbp_generic
* target
;
13458 gcc_assert (stree
&& stree
->n
.tb
);
13460 if (stree
->n
.tb
->error
)
13463 /* Operators should always be GENERIC bindings. */
13464 gcc_assert (stree
->n
.tb
->is_generic
);
13466 /* Find overridden procedure, if any. */
13467 super_type
= gfc_get_derived_super_type (resolve_bindings_derived
);
13468 if (super_type
&& super_type
->f2k_derived
)
13470 gfc_symtree
* overridden
;
13471 overridden
= gfc_find_typebound_user_op (super_type
, NULL
,
13472 stree
->name
, true, NULL
);
13474 if (overridden
&& overridden
->n
.tb
)
13475 stree
->n
.tb
->overridden
= overridden
->n
.tb
;
13478 stree
->n
.tb
->overridden
= NULL
;
13480 /* Resolve basically using worker function. */
13481 if (!resolve_tb_generic_targets (super_type
, stree
->n
.tb
, stree
->name
))
13484 /* Check the targets to be functions of correct interface. */
13485 for (target
= stree
->n
.tb
->u
.generic
; target
; target
= target
->next
)
13487 gfc_symbol
* target_proc
;
13489 target_proc
= get_checked_tb_operator_target (target
, stree
->n
.tb
->where
);
13493 if (!check_uop_procedure (target_proc
, stree
->n
.tb
->where
))
13500 resolve_bindings_result
= false;
13501 stree
->n
.tb
->error
= 1;
13505 /* Resolve the type-bound procedures for a derived type. */
13508 resolve_typebound_procedure (gfc_symtree
* stree
)
13512 gfc_symbol
* me_arg
;
13513 gfc_symbol
* super_type
;
13514 gfc_component
* comp
;
13516 gcc_assert (stree
);
13518 /* Undefined specific symbol from GENERIC target definition. */
13522 if (stree
->n
.tb
->error
)
13525 /* If this is a GENERIC binding, use that routine. */
13526 if (stree
->n
.tb
->is_generic
)
13528 if (!resolve_typebound_generic (resolve_bindings_derived
, stree
))
13533 /* Get the target-procedure to check it. */
13534 gcc_assert (!stree
->n
.tb
->is_generic
);
13535 gcc_assert (stree
->n
.tb
->u
.specific
);
13536 proc
= stree
->n
.tb
->u
.specific
->n
.sym
;
13537 where
= stree
->n
.tb
->where
;
13539 /* Default access should already be resolved from the parser. */
13540 gcc_assert (stree
->n
.tb
->access
!= ACCESS_UNKNOWN
);
13542 if (stree
->n
.tb
->deferred
)
13544 if (!check_proc_interface (proc
, &where
))
13549 /* Check for F08:C465. */
13550 if ((!proc
->attr
.subroutine
&& !proc
->attr
.function
)
13551 || (proc
->attr
.proc
!= PROC_MODULE
13552 && proc
->attr
.if_source
!= IFSRC_IFBODY
)
13553 || proc
->attr
.abstract
)
13555 gfc_error ("%qs must be a module procedure or an external procedure with"
13556 " an explicit interface at %L", proc
->name
, &where
);
13561 stree
->n
.tb
->subroutine
= proc
->attr
.subroutine
;
13562 stree
->n
.tb
->function
= proc
->attr
.function
;
13564 /* Find the super-type of the current derived type. We could do this once and
13565 store in a global if speed is needed, but as long as not I believe this is
13566 more readable and clearer. */
13567 super_type
= gfc_get_derived_super_type (resolve_bindings_derived
);
13569 /* If PASS, resolve and check arguments if not already resolved / loaded
13570 from a .mod file. */
13571 if (!stree
->n
.tb
->nopass
&& stree
->n
.tb
->pass_arg_num
== 0)
13573 gfc_formal_arglist
*dummy_args
;
13575 dummy_args
= gfc_sym_get_dummy_args (proc
);
13576 if (stree
->n
.tb
->pass_arg
)
13578 gfc_formal_arglist
*i
;
13580 /* If an explicit passing argument name is given, walk the arg-list
13581 and look for it. */
13584 stree
->n
.tb
->pass_arg_num
= 1;
13585 for (i
= dummy_args
; i
; i
= i
->next
)
13587 if (!strcmp (i
->sym
->name
, stree
->n
.tb
->pass_arg
))
13592 ++stree
->n
.tb
->pass_arg_num
;
13597 gfc_error ("Procedure %qs with PASS(%s) at %L has no"
13599 proc
->name
, stree
->n
.tb
->pass_arg
, &where
,
13600 stree
->n
.tb
->pass_arg
);
13606 /* Otherwise, take the first one; there should in fact be at least
13608 stree
->n
.tb
->pass_arg_num
= 1;
13611 gfc_error ("Procedure %qs with PASS at %L must have at"
13612 " least one argument", proc
->name
, &where
);
13615 me_arg
= dummy_args
->sym
;
13618 /* Now check that the argument-type matches and the passed-object
13619 dummy argument is generally fine. */
13621 gcc_assert (me_arg
);
13623 if (me_arg
->ts
.type
!= BT_CLASS
)
13625 gfc_error ("Non-polymorphic passed-object dummy argument of %qs"
13626 " at %L", proc
->name
, &where
);
13630 if (CLASS_DATA (me_arg
)->ts
.u
.derived
13631 != resolve_bindings_derived
)
13633 gfc_error ("Argument %qs of %qs with PASS(%s) at %L must be of"
13634 " the derived-type %qs", me_arg
->name
, proc
->name
,
13635 me_arg
->name
, &where
, resolve_bindings_derived
->name
);
13639 gcc_assert (me_arg
->ts
.type
== BT_CLASS
);
13640 if (CLASS_DATA (me_arg
)->as
&& CLASS_DATA (me_arg
)->as
->rank
!= 0)
13642 gfc_error ("Passed-object dummy argument of %qs at %L must be"
13643 " scalar", proc
->name
, &where
);
13646 if (CLASS_DATA (me_arg
)->attr
.allocatable
)
13648 gfc_error ("Passed-object dummy argument of %qs at %L must not"
13649 " be ALLOCATABLE", proc
->name
, &where
);
13652 if (CLASS_DATA (me_arg
)->attr
.class_pointer
)
13654 gfc_error ("Passed-object dummy argument of %qs at %L must not"
13655 " be POINTER", proc
->name
, &where
);
13660 /* If we are extending some type, check that we don't override a procedure
13661 flagged NON_OVERRIDABLE. */
13662 stree
->n
.tb
->overridden
= NULL
;
13665 gfc_symtree
* overridden
;
13666 overridden
= gfc_find_typebound_proc (super_type
, NULL
,
13667 stree
->name
, true, NULL
);
13671 if (overridden
->n
.tb
)
13672 stree
->n
.tb
->overridden
= overridden
->n
.tb
;
13674 if (!gfc_check_typebound_override (stree
, overridden
))
13679 /* See if there's a name collision with a component directly in this type. */
13680 for (comp
= resolve_bindings_derived
->components
; comp
; comp
= comp
->next
)
13681 if (!strcmp (comp
->name
, stree
->name
))
13683 gfc_error ("Procedure %qs at %L has the same name as a component of"
13685 stree
->name
, &where
, resolve_bindings_derived
->name
);
13689 /* Try to find a name collision with an inherited component. */
13690 if (super_type
&& gfc_find_component (super_type
, stree
->name
, true, true,
13693 gfc_error ("Procedure %qs at %L has the same name as an inherited"
13694 " component of %qs",
13695 stree
->name
, &where
, resolve_bindings_derived
->name
);
13699 stree
->n
.tb
->error
= 0;
13703 resolve_bindings_result
= false;
13704 stree
->n
.tb
->error
= 1;
13709 resolve_typebound_procedures (gfc_symbol
* derived
)
13712 gfc_symbol
* super_type
;
13714 if (!derived
->f2k_derived
|| !derived
->f2k_derived
->tb_sym_root
)
13717 super_type
= gfc_get_derived_super_type (derived
);
13719 resolve_symbol (super_type
);
13721 resolve_bindings_derived
= derived
;
13722 resolve_bindings_result
= true;
13724 if (derived
->f2k_derived
->tb_sym_root
)
13725 gfc_traverse_symtree (derived
->f2k_derived
->tb_sym_root
,
13726 &resolve_typebound_procedure
);
13728 if (derived
->f2k_derived
->tb_uop_root
)
13729 gfc_traverse_symtree (derived
->f2k_derived
->tb_uop_root
,
13730 &resolve_typebound_user_op
);
13732 for (op
= 0; op
!= GFC_INTRINSIC_OPS
; ++op
)
13734 gfc_typebound_proc
* p
= derived
->f2k_derived
->tb_op
[op
];
13735 if (p
&& !resolve_typebound_intrinsic_op (derived
,
13736 (gfc_intrinsic_op
)op
, p
))
13737 resolve_bindings_result
= false;
13740 return resolve_bindings_result
;
13744 /* Add a derived type to the dt_list. The dt_list is used in trans-types.c
13745 to give all identical derived types the same backend_decl. */
13747 add_dt_to_dt_list (gfc_symbol
*derived
)
13749 if (!derived
->dt_next
)
13751 if (gfc_derived_types
)
13753 derived
->dt_next
= gfc_derived_types
->dt_next
;
13754 gfc_derived_types
->dt_next
= derived
;
13758 derived
->dt_next
= derived
;
13760 gfc_derived_types
= derived
;
13765 /* Ensure that a derived-type is really not abstract, meaning that every
13766 inherited DEFERRED binding is overridden by a non-DEFERRED one. */
13769 ensure_not_abstract_walker (gfc_symbol
* sub
, gfc_symtree
* st
)
13774 if (!ensure_not_abstract_walker (sub
, st
->left
))
13776 if (!ensure_not_abstract_walker (sub
, st
->right
))
13779 if (st
->n
.tb
&& st
->n
.tb
->deferred
)
13781 gfc_symtree
* overriding
;
13782 overriding
= gfc_find_typebound_proc (sub
, NULL
, st
->name
, true, NULL
);
13785 gcc_assert (overriding
->n
.tb
);
13786 if (overriding
->n
.tb
->deferred
)
13788 gfc_error ("Derived-type %qs declared at %L must be ABSTRACT because"
13789 " %qs is DEFERRED and not overridden",
13790 sub
->name
, &sub
->declared_at
, st
->name
);
13799 ensure_not_abstract (gfc_symbol
* sub
, gfc_symbol
* ancestor
)
13801 /* The algorithm used here is to recursively travel up the ancestry of sub
13802 and for each ancestor-type, check all bindings. If any of them is
13803 DEFERRED, look it up starting from sub and see if the found (overriding)
13804 binding is not DEFERRED.
13805 This is not the most efficient way to do this, but it should be ok and is
13806 clearer than something sophisticated. */
13808 gcc_assert (ancestor
&& !sub
->attr
.abstract
);
13810 if (!ancestor
->attr
.abstract
)
13813 /* Walk bindings of this ancestor. */
13814 if (ancestor
->f2k_derived
)
13817 t
= ensure_not_abstract_walker (sub
, ancestor
->f2k_derived
->tb_sym_root
);
13822 /* Find next ancestor type and recurse on it. */
13823 ancestor
= gfc_get_derived_super_type (ancestor
);
13825 return ensure_not_abstract (sub
, ancestor
);
13831 /* This check for typebound defined assignments is done recursively
13832 since the order in which derived types are resolved is not always in
13833 order of the declarations. */
13836 check_defined_assignments (gfc_symbol
*derived
)
13840 for (c
= derived
->components
; c
; c
= c
->next
)
13842 if (!gfc_bt_struct (c
->ts
.type
)
13844 || c
->attr
.allocatable
13845 || c
->attr
.proc_pointer_comp
13846 || c
->attr
.class_pointer
13847 || c
->attr
.proc_pointer
)
13850 if (c
->ts
.u
.derived
->attr
.defined_assign_comp
13851 || (c
->ts
.u
.derived
->f2k_derived
13852 && c
->ts
.u
.derived
->f2k_derived
->tb_op
[INTRINSIC_ASSIGN
]))
13854 derived
->attr
.defined_assign_comp
= 1;
13858 check_defined_assignments (c
->ts
.u
.derived
);
13859 if (c
->ts
.u
.derived
->attr
.defined_assign_comp
)
13861 derived
->attr
.defined_assign_comp
= 1;
13868 /* Resolve a single component of a derived type or structure. */
13871 resolve_component (gfc_component
*c
, gfc_symbol
*sym
)
13873 gfc_symbol
*super_type
;
13874 symbol_attribute
*attr
;
13876 if (c
->attr
.artificial
)
13879 /* Do not allow vtype components to be resolved in nameless namespaces
13880 such as block data because the procedure pointers will cause ICEs
13881 and vtables are not needed in these contexts. */
13882 if (sym
->attr
.vtype
&& sym
->attr
.use_assoc
13883 && sym
->ns
->proc_name
== NULL
)
13887 if ((!sym
->attr
.is_class
|| c
!= sym
->components
)
13888 && c
->attr
.codimension
13889 && (!c
->attr
.allocatable
|| (c
->as
&& c
->as
->type
!= AS_DEFERRED
)))
13891 gfc_error ("Coarray component %qs at %L must be allocatable with "
13892 "deferred shape", c
->name
, &c
->loc
);
13897 if (c
->attr
.codimension
&& c
->ts
.type
== BT_DERIVED
13898 && c
->ts
.u
.derived
->ts
.is_iso_c
)
13900 gfc_error ("Component %qs at %L of TYPE(C_PTR) or TYPE(C_FUNPTR) "
13901 "shall not be a coarray", c
->name
, &c
->loc
);
13906 if (gfc_bt_struct (c
->ts
.type
) && c
->ts
.u
.derived
->attr
.coarray_comp
13907 && (c
->attr
.codimension
|| c
->attr
.pointer
|| c
->attr
.dimension
13908 || c
->attr
.allocatable
))
13910 gfc_error ("Component %qs at %L with coarray component "
13911 "shall be a nonpointer, nonallocatable scalar",
13917 if (c
->ts
.type
== BT_CLASS
)
13919 if (CLASS_DATA (c
))
13921 attr
= &(CLASS_DATA (c
)->attr
);
13923 /* Fix up contiguous attribute. */
13924 if (c
->attr
.contiguous
)
13925 attr
->contiguous
= 1;
13933 if (attr
&& attr
->contiguous
&& (!attr
->dimension
|| !attr
->pointer
))
13935 gfc_error ("Component %qs at %L has the CONTIGUOUS attribute but "
13936 "is not an array pointer", c
->name
, &c
->loc
);
13940 /* F2003, 15.2.1 - length has to be one. */
13941 if (sym
->attr
.is_bind_c
&& c
->ts
.type
== BT_CHARACTER
13942 && (c
->ts
.u
.cl
== NULL
|| c
->ts
.u
.cl
->length
== NULL
13943 || !gfc_is_constant_expr (c
->ts
.u
.cl
->length
)
13944 || mpz_cmp_si (c
->ts
.u
.cl
->length
->value
.integer
, 1) != 0))
13946 gfc_error ("Component %qs of BIND(C) type at %L must have length one",
13951 if (c
->attr
.proc_pointer
&& c
->ts
.interface
)
13953 gfc_symbol
*ifc
= c
->ts
.interface
;
13955 if (!sym
->attr
.vtype
&& !check_proc_interface (ifc
, &c
->loc
))
13961 if (ifc
->attr
.if_source
|| ifc
->attr
.intrinsic
)
13963 /* Resolve interface and copy attributes. */
13964 if (ifc
->formal
&& !ifc
->formal_ns
)
13965 resolve_symbol (ifc
);
13966 if (ifc
->attr
.intrinsic
)
13967 gfc_resolve_intrinsic (ifc
, &ifc
->declared_at
);
13971 c
->ts
= ifc
->result
->ts
;
13972 c
->attr
.allocatable
= ifc
->result
->attr
.allocatable
;
13973 c
->attr
.pointer
= ifc
->result
->attr
.pointer
;
13974 c
->attr
.dimension
= ifc
->result
->attr
.dimension
;
13975 c
->as
= gfc_copy_array_spec (ifc
->result
->as
);
13976 c
->attr
.class_ok
= ifc
->result
->attr
.class_ok
;
13981 c
->attr
.allocatable
= ifc
->attr
.allocatable
;
13982 c
->attr
.pointer
= ifc
->attr
.pointer
;
13983 c
->attr
.dimension
= ifc
->attr
.dimension
;
13984 c
->as
= gfc_copy_array_spec (ifc
->as
);
13985 c
->attr
.class_ok
= ifc
->attr
.class_ok
;
13987 c
->ts
.interface
= ifc
;
13988 c
->attr
.function
= ifc
->attr
.function
;
13989 c
->attr
.subroutine
= ifc
->attr
.subroutine
;
13991 c
->attr
.pure
= ifc
->attr
.pure
;
13992 c
->attr
.elemental
= ifc
->attr
.elemental
;
13993 c
->attr
.recursive
= ifc
->attr
.recursive
;
13994 c
->attr
.always_explicit
= ifc
->attr
.always_explicit
;
13995 c
->attr
.ext_attr
|= ifc
->attr
.ext_attr
;
13996 /* Copy char length. */
13997 if (ifc
->ts
.type
== BT_CHARACTER
&& ifc
->ts
.u
.cl
)
13999 gfc_charlen
*cl
= gfc_new_charlen (sym
->ns
, ifc
->ts
.u
.cl
);
14000 if (cl
->length
&& !cl
->resolved
14001 && !gfc_resolve_expr (cl
->length
))
14010 else if (c
->attr
.proc_pointer
&& c
->ts
.type
== BT_UNKNOWN
)
14012 /* Since PPCs are not implicitly typed, a PPC without an explicit
14013 interface must be a subroutine. */
14014 gfc_add_subroutine (&c
->attr
, c
->name
, &c
->loc
);
14017 /* Procedure pointer components: Check PASS arg. */
14018 if (c
->attr
.proc_pointer
&& !c
->tb
->nopass
&& c
->tb
->pass_arg_num
== 0
14019 && !sym
->attr
.vtype
)
14021 gfc_symbol
* me_arg
;
14023 if (c
->tb
->pass_arg
)
14025 gfc_formal_arglist
* i
;
14027 /* If an explicit passing argument name is given, walk the arg-list
14028 and look for it. */
14031 c
->tb
->pass_arg_num
= 1;
14032 for (i
= c
->ts
.interface
->formal
; i
; i
= i
->next
)
14034 if (!strcmp (i
->sym
->name
, c
->tb
->pass_arg
))
14039 c
->tb
->pass_arg_num
++;
14044 gfc_error ("Procedure pointer component %qs with PASS(%s) "
14045 "at %L has no argument %qs", c
->name
,
14046 c
->tb
->pass_arg
, &c
->loc
, c
->tb
->pass_arg
);
14053 /* Otherwise, take the first one; there should in fact be at least
14055 c
->tb
->pass_arg_num
= 1;
14056 if (!c
->ts
.interface
->formal
)
14058 gfc_error ("Procedure pointer component %qs with PASS at %L "
14059 "must have at least one argument",
14064 me_arg
= c
->ts
.interface
->formal
->sym
;
14067 /* Now check that the argument-type matches. */
14068 gcc_assert (me_arg
);
14069 if ((me_arg
->ts
.type
!= BT_DERIVED
&& me_arg
->ts
.type
!= BT_CLASS
)
14070 || (me_arg
->ts
.type
== BT_DERIVED
&& me_arg
->ts
.u
.derived
!= sym
)
14071 || (me_arg
->ts
.type
== BT_CLASS
14072 && CLASS_DATA (me_arg
)->ts
.u
.derived
!= sym
))
14074 gfc_error ("Argument %qs of %qs with PASS(%s) at %L must be of"
14075 " the derived type %qs", me_arg
->name
, c
->name
,
14076 me_arg
->name
, &c
->loc
, sym
->name
);
14081 /* Check for F03:C453. */
14082 if (CLASS_DATA (me_arg
)->attr
.dimension
)
14084 gfc_error ("Argument %qs of %qs with PASS(%s) at %L "
14085 "must be scalar", me_arg
->name
, c
->name
, me_arg
->name
,
14091 if (CLASS_DATA (me_arg
)->attr
.class_pointer
)
14093 gfc_error ("Argument %qs of %qs with PASS(%s) at %L "
14094 "may not have the POINTER attribute", me_arg
->name
,
14095 c
->name
, me_arg
->name
, &c
->loc
);
14100 if (CLASS_DATA (me_arg
)->attr
.allocatable
)
14102 gfc_error ("Argument %qs of %qs with PASS(%s) at %L "
14103 "may not be ALLOCATABLE", me_arg
->name
, c
->name
,
14104 me_arg
->name
, &c
->loc
);
14109 if (gfc_type_is_extensible (sym
) && me_arg
->ts
.type
!= BT_CLASS
)
14111 gfc_error ("Non-polymorphic passed-object dummy argument of %qs"
14112 " at %L", c
->name
, &c
->loc
);
14118 /* Check type-spec if this is not the parent-type component. */
14119 if (((sym
->attr
.is_class
14120 && (!sym
->components
->ts
.u
.derived
->attr
.extension
14121 || c
!= sym
->components
->ts
.u
.derived
->components
))
14122 || (!sym
->attr
.is_class
14123 && (!sym
->attr
.extension
|| c
!= sym
->components
)))
14124 && !sym
->attr
.vtype
14125 && !resolve_typespec_used (&c
->ts
, &c
->loc
, c
->name
))
14128 super_type
= gfc_get_derived_super_type (sym
);
14130 /* If this type is an extension, set the accessibility of the parent
14133 && ((sym
->attr
.is_class
14134 && c
== sym
->components
->ts
.u
.derived
->components
)
14135 || (!sym
->attr
.is_class
&& c
== sym
->components
))
14136 && strcmp (super_type
->name
, c
->name
) == 0)
14137 c
->attr
.access
= super_type
->attr
.access
;
14139 /* If this type is an extension, see if this component has the same name
14140 as an inherited type-bound procedure. */
14141 if (super_type
&& !sym
->attr
.is_class
14142 && gfc_find_typebound_proc (super_type
, NULL
, c
->name
, true, NULL
))
14144 gfc_error ("Component %qs of %qs at %L has the same name as an"
14145 " inherited type-bound procedure",
14146 c
->name
, sym
->name
, &c
->loc
);
14150 if (c
->ts
.type
== BT_CHARACTER
&& !c
->attr
.proc_pointer
14151 && !c
->ts
.deferred
)
14153 if (c
->ts
.u
.cl
->length
== NULL
14154 || (!resolve_charlen(c
->ts
.u
.cl
))
14155 || !gfc_is_constant_expr (c
->ts
.u
.cl
->length
))
14157 gfc_error ("Character length of component %qs needs to "
14158 "be a constant specification expression at %L",
14160 c
->ts
.u
.cl
->length
? &c
->ts
.u
.cl
->length
->where
: &c
->loc
);
14165 if (c
->ts
.type
== BT_CHARACTER
&& c
->ts
.deferred
14166 && !c
->attr
.pointer
&& !c
->attr
.allocatable
)
14168 gfc_error ("Character component %qs of %qs at %L with deferred "
14169 "length must be a POINTER or ALLOCATABLE",
14170 c
->name
, sym
->name
, &c
->loc
);
14174 /* Add the hidden deferred length field. */
14175 if (c
->ts
.type
== BT_CHARACTER
14176 && (c
->ts
.deferred
|| c
->attr
.pdt_string
)
14177 && !c
->attr
.function
14178 && !sym
->attr
.is_class
)
14180 char name
[GFC_MAX_SYMBOL_LEN
+9];
14181 gfc_component
*strlen
;
14182 sprintf (name
, "_%s_length", c
->name
);
14183 strlen
= gfc_find_component (sym
, name
, true, true, NULL
);
14184 if (strlen
== NULL
)
14186 if (!gfc_add_component (sym
, name
, &strlen
))
14188 strlen
->ts
.type
= BT_INTEGER
;
14189 strlen
->ts
.kind
= gfc_charlen_int_kind
;
14190 strlen
->attr
.access
= ACCESS_PRIVATE
;
14191 strlen
->attr
.artificial
= 1;
14195 if (c
->ts
.type
== BT_DERIVED
14196 && sym
->component_access
!= ACCESS_PRIVATE
14197 && gfc_check_symbol_access (sym
)
14198 && !is_sym_host_assoc (c
->ts
.u
.derived
, sym
->ns
)
14199 && !c
->ts
.u
.derived
->attr
.use_assoc
14200 && !gfc_check_symbol_access (c
->ts
.u
.derived
)
14201 && !gfc_notify_std (GFC_STD_F2003
, "the component %qs is a "
14202 "PRIVATE type and cannot be a component of "
14203 "%qs, which is PUBLIC at %L", c
->name
,
14204 sym
->name
, &sym
->declared_at
))
14207 if ((sym
->attr
.sequence
|| sym
->attr
.is_bind_c
) && c
->ts
.type
== BT_CLASS
)
14209 gfc_error ("Polymorphic component %s at %L in SEQUENCE or BIND(C) "
14210 "type %s", c
->name
, &c
->loc
, sym
->name
);
14214 if (sym
->attr
.sequence
)
14216 if (c
->ts
.type
== BT_DERIVED
&& c
->ts
.u
.derived
->attr
.sequence
== 0)
14218 gfc_error ("Component %s of SEQUENCE type declared at %L does "
14219 "not have the SEQUENCE attribute",
14220 c
->ts
.u
.derived
->name
, &sym
->declared_at
);
14225 if (c
->ts
.type
== BT_DERIVED
&& c
->ts
.u
.derived
->attr
.generic
)
14226 c
->ts
.u
.derived
= gfc_find_dt_in_generic (c
->ts
.u
.derived
);
14227 else if (c
->ts
.type
== BT_CLASS
&& c
->attr
.class_ok
14228 && CLASS_DATA (c
)->ts
.u
.derived
->attr
.generic
)
14229 CLASS_DATA (c
)->ts
.u
.derived
14230 = gfc_find_dt_in_generic (CLASS_DATA (c
)->ts
.u
.derived
);
14232 /* If an allocatable component derived type is of the same type as
14233 the enclosing derived type, we need a vtable generating so that
14234 the __deallocate procedure is created. */
14235 if ((c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
14236 && c
->ts
.u
.derived
== sym
&& c
->attr
.allocatable
== 1)
14237 gfc_find_vtab (&c
->ts
);
14239 /* Ensure that all the derived type components are put on the
14240 derived type list; even in formal namespaces, where derived type
14241 pointer components might not have been declared. */
14242 if (c
->ts
.type
== BT_DERIVED
14244 && c
->ts
.u
.derived
->components
14246 && sym
!= c
->ts
.u
.derived
)
14247 add_dt_to_dt_list (c
->ts
.u
.derived
);
14249 if (!gfc_resolve_array_spec (c
->as
,
14250 !(c
->attr
.pointer
|| c
->attr
.proc_pointer
14251 || c
->attr
.allocatable
)))
14254 if (c
->initializer
&& !sym
->attr
.vtype
14255 && !c
->attr
.pdt_kind
&& !c
->attr
.pdt_len
14256 && !gfc_check_assign_symbol (sym
, c
, c
->initializer
))
14263 /* Be nice about the locus for a structure expression - show the locus of the
14264 first non-null sub-expression if we can. */
14267 cons_where (gfc_expr
*struct_expr
)
14269 gfc_constructor
*cons
;
14271 gcc_assert (struct_expr
&& struct_expr
->expr_type
== EXPR_STRUCTURE
);
14273 cons
= gfc_constructor_first (struct_expr
->value
.constructor
);
14274 for (; cons
; cons
= gfc_constructor_next (cons
))
14276 if (cons
->expr
&& cons
->expr
->expr_type
!= EXPR_NULL
)
14277 return &cons
->expr
->where
;
14280 return &struct_expr
->where
;
14283 /* Resolve the components of a structure type. Much less work than derived
14287 resolve_fl_struct (gfc_symbol
*sym
)
14290 gfc_expr
*init
= NULL
;
14293 /* Make sure UNIONs do not have overlapping initializers. */
14294 if (sym
->attr
.flavor
== FL_UNION
)
14296 for (c
= sym
->components
; c
; c
= c
->next
)
14298 if (init
&& c
->initializer
)
14300 gfc_error ("Conflicting initializers in union at %L and %L",
14301 cons_where (init
), cons_where (c
->initializer
));
14302 gfc_free_expr (c
->initializer
);
14303 c
->initializer
= NULL
;
14306 init
= c
->initializer
;
14311 for (c
= sym
->components
; c
; c
= c
->next
)
14312 if (!resolve_component (c
, sym
))
14318 if (sym
->components
)
14319 add_dt_to_dt_list (sym
);
14325 /* Resolve the components of a derived type. This does not have to wait until
14326 resolution stage, but can be done as soon as the dt declaration has been
14330 resolve_fl_derived0 (gfc_symbol
*sym
)
14332 gfc_symbol
* super_type
;
14334 gfc_formal_arglist
*f
;
14337 if (sym
->attr
.unlimited_polymorphic
)
14340 super_type
= gfc_get_derived_super_type (sym
);
14343 if (super_type
&& sym
->attr
.coarray_comp
&& !super_type
->attr
.coarray_comp
)
14345 gfc_error ("As extending type %qs at %L has a coarray component, "
14346 "parent type %qs shall also have one", sym
->name
,
14347 &sym
->declared_at
, super_type
->name
);
14351 /* Ensure the extended type gets resolved before we do. */
14352 if (super_type
&& !resolve_fl_derived0 (super_type
))
14355 /* An ABSTRACT type must be extensible. */
14356 if (sym
->attr
.abstract
&& !gfc_type_is_extensible (sym
))
14358 gfc_error ("Non-extensible derived-type %qs at %L must not be ABSTRACT",
14359 sym
->name
, &sym
->declared_at
);
14363 c
= (sym
->attr
.is_class
) ? sym
->components
->ts
.u
.derived
->components
14367 for ( ; c
!= NULL
; c
= c
->next
)
14368 if (!resolve_component (c
, sym
))
14374 /* Now add the caf token field, where needed. */
14375 if (flag_coarray
!= GFC_FCOARRAY_NONE
14376 && !sym
->attr
.is_class
&& !sym
->attr
.vtype
)
14378 for (c
= sym
->components
; c
; c
= c
->next
)
14379 if (!c
->attr
.dimension
&& !c
->attr
.codimension
14380 && (c
->attr
.allocatable
|| c
->attr
.pointer
))
14382 char name
[GFC_MAX_SYMBOL_LEN
+9];
14383 gfc_component
*token
;
14384 sprintf (name
, "_caf_%s", c
->name
);
14385 token
= gfc_find_component (sym
, name
, true, true, NULL
);
14388 if (!gfc_add_component (sym
, name
, &token
))
14390 token
->ts
.type
= BT_VOID
;
14391 token
->ts
.kind
= gfc_default_integer_kind
;
14392 token
->attr
.access
= ACCESS_PRIVATE
;
14393 token
->attr
.artificial
= 1;
14394 token
->attr
.caf_token
= 1;
14399 check_defined_assignments (sym
);
14401 if (!sym
->attr
.defined_assign_comp
&& super_type
)
14402 sym
->attr
.defined_assign_comp
14403 = super_type
->attr
.defined_assign_comp
;
14405 /* If this is a non-ABSTRACT type extending an ABSTRACT one, ensure that
14406 all DEFERRED bindings are overridden. */
14407 if (super_type
&& super_type
->attr
.abstract
&& !sym
->attr
.abstract
14408 && !sym
->attr
.is_class
14409 && !ensure_not_abstract (sym
, super_type
))
14412 /* Check that there is a component for every PDT parameter. */
14413 if (sym
->attr
.pdt_template
)
14415 for (f
= sym
->formal
; f
; f
= f
->next
)
14419 c
= gfc_find_component (sym
, f
->sym
->name
, true, true, NULL
);
14422 gfc_error ("Parameterized type %qs does not have a component "
14423 "corresponding to parameter %qs at %L", sym
->name
,
14424 f
->sym
->name
, &sym
->declared_at
);
14430 /* Add derived type to the derived type list. */
14431 add_dt_to_dt_list (sym
);
14437 /* The following procedure does the full resolution of a derived type,
14438 including resolution of all type-bound procedures (if present). In contrast
14439 to 'resolve_fl_derived0' this can only be done after the module has been
14440 parsed completely. */
14443 resolve_fl_derived (gfc_symbol
*sym
)
14445 gfc_symbol
*gen_dt
= NULL
;
14447 if (sym
->attr
.unlimited_polymorphic
)
14450 if (!sym
->attr
.is_class
)
14451 gfc_find_symbol (sym
->name
, sym
->ns
, 0, &gen_dt
);
14452 if (gen_dt
&& gen_dt
->generic
&& gen_dt
->generic
->next
14453 && (!gen_dt
->generic
->sym
->attr
.use_assoc
14454 || gen_dt
->generic
->sym
->module
!= gen_dt
->generic
->next
->sym
->module
)
14455 && !gfc_notify_std (GFC_STD_F2003
, "Generic name %qs of function "
14456 "%qs at %L being the same name as derived "
14457 "type at %L", sym
->name
,
14458 gen_dt
->generic
->sym
== sym
14459 ? gen_dt
->generic
->next
->sym
->name
14460 : gen_dt
->generic
->sym
->name
,
14461 gen_dt
->generic
->sym
== sym
14462 ? &gen_dt
->generic
->next
->sym
->declared_at
14463 : &gen_dt
->generic
->sym
->declared_at
,
14464 &sym
->declared_at
))
14467 if (sym
->components
== NULL
&& !sym
->attr
.zero_comp
&& !sym
->attr
.use_assoc
)
14469 gfc_error ("Derived type %qs at %L has not been declared",
14470 sym
->name
, &sym
->declared_at
);
14474 /* Resolve the finalizer procedures. */
14475 if (!gfc_resolve_finalizers (sym
, NULL
))
14478 if (sym
->attr
.is_class
&& sym
->ts
.u
.derived
== NULL
)
14480 /* Fix up incomplete CLASS symbols. */
14481 gfc_component
*data
= gfc_find_component (sym
, "_data", true, true, NULL
);
14482 gfc_component
*vptr
= gfc_find_component (sym
, "_vptr", true, true, NULL
);
14484 /* Nothing more to do for unlimited polymorphic entities. */
14485 if (data
->ts
.u
.derived
->attr
.unlimited_polymorphic
)
14487 else if (vptr
->ts
.u
.derived
== NULL
)
14489 gfc_symbol
*vtab
= gfc_find_derived_vtab (data
->ts
.u
.derived
);
14491 vptr
->ts
.u
.derived
= vtab
->ts
.u
.derived
;
14492 if (!resolve_fl_derived0 (vptr
->ts
.u
.derived
))
14497 if (!resolve_fl_derived0 (sym
))
14500 /* Resolve the type-bound procedures. */
14501 if (!resolve_typebound_procedures (sym
))
14504 /* Generate module vtables subject to their accessibility and their not
14505 being vtables or pdt templates. If this is not done class declarations
14506 in external procedures wind up with their own version and so SELECT TYPE
14507 fails because the vptrs do not have the same address. */
14508 if (gfc_option
.allow_std
& GFC_STD_F2003
14509 && sym
->ns
->proc_name
14510 && sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
14511 && sym
->attr
.access
!= ACCESS_PRIVATE
14512 && !(sym
->attr
.use_assoc
|| sym
->attr
.vtype
|| sym
->attr
.pdt_template
))
14514 gfc_symbol
*vtab
= gfc_find_derived_vtab (sym
);
14515 gfc_set_sym_referenced (vtab
);
14523 resolve_fl_namelist (gfc_symbol
*sym
)
14528 for (nl
= sym
->namelist
; nl
; nl
= nl
->next
)
14530 /* Check again, the check in match only works if NAMELIST comes
14532 if (nl
->sym
->as
&& nl
->sym
->as
->type
== AS_ASSUMED_SIZE
)
14534 gfc_error ("Assumed size array %qs in namelist %qs at %L is not "
14535 "allowed", nl
->sym
->name
, sym
->name
, &sym
->declared_at
);
14539 if (nl
->sym
->as
&& nl
->sym
->as
->type
== AS_ASSUMED_SHAPE
14540 && !gfc_notify_std (GFC_STD_F2003
, "NAMELIST array object %qs "
14541 "with assumed shape in namelist %qs at %L",
14542 nl
->sym
->name
, sym
->name
, &sym
->declared_at
))
14545 if (is_non_constant_shape_array (nl
->sym
)
14546 && !gfc_notify_std (GFC_STD_F2003
, "NAMELIST array object %qs "
14547 "with nonconstant shape in namelist %qs at %L",
14548 nl
->sym
->name
, sym
->name
, &sym
->declared_at
))
14551 if (nl
->sym
->ts
.type
== BT_CHARACTER
14552 && (nl
->sym
->ts
.u
.cl
->length
== NULL
14553 || !gfc_is_constant_expr (nl
->sym
->ts
.u
.cl
->length
))
14554 && !gfc_notify_std (GFC_STD_F2003
, "NAMELIST object %qs with "
14555 "nonconstant character length in "
14556 "namelist %qs at %L", nl
->sym
->name
,
14557 sym
->name
, &sym
->declared_at
))
14562 /* Reject PRIVATE objects in a PUBLIC namelist. */
14563 if (gfc_check_symbol_access (sym
))
14565 for (nl
= sym
->namelist
; nl
; nl
= nl
->next
)
14567 if (!nl
->sym
->attr
.use_assoc
14568 && !is_sym_host_assoc (nl
->sym
, sym
->ns
)
14569 && !gfc_check_symbol_access (nl
->sym
))
14571 gfc_error ("NAMELIST object %qs was declared PRIVATE and "
14572 "cannot be member of PUBLIC namelist %qs at %L",
14573 nl
->sym
->name
, sym
->name
, &sym
->declared_at
);
14577 if (nl
->sym
->ts
.type
== BT_DERIVED
14578 && (nl
->sym
->ts
.u
.derived
->attr
.alloc_comp
14579 || nl
->sym
->ts
.u
.derived
->attr
.pointer_comp
))
14581 if (!gfc_notify_std (GFC_STD_F2003
, "NAMELIST object %qs in "
14582 "namelist %qs at %L with ALLOCATABLE "
14583 "or POINTER components", nl
->sym
->name
,
14584 sym
->name
, &sym
->declared_at
))
14589 /* Types with private components that came here by USE-association. */
14590 if (nl
->sym
->ts
.type
== BT_DERIVED
14591 && derived_inaccessible (nl
->sym
->ts
.u
.derived
))
14593 gfc_error ("NAMELIST object %qs has use-associated PRIVATE "
14594 "components and cannot be member of namelist %qs at %L",
14595 nl
->sym
->name
, sym
->name
, &sym
->declared_at
);
14599 /* Types with private components that are defined in the same module. */
14600 if (nl
->sym
->ts
.type
== BT_DERIVED
14601 && !is_sym_host_assoc (nl
->sym
->ts
.u
.derived
, sym
->ns
)
14602 && nl
->sym
->ts
.u
.derived
->attr
.private_comp
)
14604 gfc_error ("NAMELIST object %qs has PRIVATE components and "
14605 "cannot be a member of PUBLIC namelist %qs at %L",
14606 nl
->sym
->name
, sym
->name
, &sym
->declared_at
);
14613 /* 14.1.2 A module or internal procedure represent local entities
14614 of the same type as a namelist member and so are not allowed. */
14615 for (nl
= sym
->namelist
; nl
; nl
= nl
->next
)
14617 if (nl
->sym
->ts
.kind
!= 0 && nl
->sym
->attr
.flavor
== FL_VARIABLE
)
14620 if (nl
->sym
->attr
.function
&& nl
->sym
== nl
->sym
->result
)
14621 if ((nl
->sym
== sym
->ns
->proc_name
)
14623 (sym
->ns
->parent
&& nl
->sym
== sym
->ns
->parent
->proc_name
))
14628 gfc_find_symbol (nl
->sym
->name
, sym
->ns
, 1, &nlsym
);
14629 if (nlsym
&& nlsym
->attr
.flavor
== FL_PROCEDURE
)
14631 gfc_error ("PROCEDURE attribute conflicts with NAMELIST "
14632 "attribute in %qs at %L", nlsym
->name
,
14633 &sym
->declared_at
);
14640 for (nl
= sym
->namelist
; nl
; nl
= nl
->next
)
14641 nl
->sym
->attr
.asynchronous
= 1;
14648 resolve_fl_parameter (gfc_symbol
*sym
)
14650 /* A parameter array's shape needs to be constant. */
14651 if (sym
->as
!= NULL
14652 && (sym
->as
->type
== AS_DEFERRED
14653 || is_non_constant_shape_array (sym
)))
14655 gfc_error ("Parameter array %qs at %L cannot be automatic "
14656 "or of deferred shape", sym
->name
, &sym
->declared_at
);
14660 /* Constraints on deferred type parameter. */
14661 if (!deferred_requirements (sym
))
14664 /* Make sure a parameter that has been implicitly typed still
14665 matches the implicit type, since PARAMETER statements can precede
14666 IMPLICIT statements. */
14667 if (sym
->attr
.implicit_type
14668 && !gfc_compare_types (&sym
->ts
, gfc_get_default_type (sym
->name
,
14671 gfc_error ("Implicitly typed PARAMETER %qs at %L doesn't match a "
14672 "later IMPLICIT type", sym
->name
, &sym
->declared_at
);
14676 /* Make sure the types of derived parameters are consistent. This
14677 type checking is deferred until resolution because the type may
14678 refer to a derived type from the host. */
14679 if (sym
->ts
.type
== BT_DERIVED
14680 && !gfc_compare_types (&sym
->ts
, &sym
->value
->ts
))
14682 gfc_error ("Incompatible derived type in PARAMETER at %L",
14683 &sym
->value
->where
);
14687 /* F03:C509,C514. */
14688 if (sym
->ts
.type
== BT_CLASS
)
14690 gfc_error ("CLASS variable %qs at %L cannot have the PARAMETER attribute",
14691 sym
->name
, &sym
->declared_at
);
14699 /* Called by resolve_symbol to check PDTs. */
14702 resolve_pdt (gfc_symbol
* sym
)
14704 gfc_symbol
*derived
= NULL
;
14705 gfc_actual_arglist
*param
;
14707 bool const_len_exprs
= true;
14708 bool assumed_len_exprs
= false;
14709 symbol_attribute
*attr
;
14711 if (sym
->ts
.type
== BT_DERIVED
)
14713 derived
= sym
->ts
.u
.derived
;
14714 attr
= &(sym
->attr
);
14716 else if (sym
->ts
.type
== BT_CLASS
)
14718 derived
= CLASS_DATA (sym
)->ts
.u
.derived
;
14719 attr
= &(CLASS_DATA (sym
)->attr
);
14722 gcc_unreachable ();
14724 gcc_assert (derived
->attr
.pdt_type
);
14726 for (param
= sym
->param_list
; param
; param
= param
->next
)
14728 c
= gfc_find_component (derived
, param
->name
, false, true, NULL
);
14730 if (c
->attr
.pdt_kind
)
14733 if (param
->expr
&& !gfc_is_constant_expr (param
->expr
)
14734 && c
->attr
.pdt_len
)
14735 const_len_exprs
= false;
14736 else if (param
->spec_type
== SPEC_ASSUMED
)
14737 assumed_len_exprs
= true;
14739 if (param
->spec_type
== SPEC_DEFERRED
14740 && !attr
->allocatable
&& !attr
->pointer
)
14741 gfc_error ("The object %qs at %L has a deferred LEN "
14742 "parameter %qs and is neither allocatable "
14743 "nor a pointer", sym
->name
, &sym
->declared_at
,
14748 if (!const_len_exprs
14749 && (sym
->ns
->proc_name
->attr
.is_main_program
14750 || sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
14751 || sym
->attr
.save
!= SAVE_NONE
))
14752 gfc_error ("The AUTOMATIC object %qs at %L must not have the "
14753 "SAVE attribute or be a variable declared in the "
14754 "main program, a module or a submodule(F08/C513)",
14755 sym
->name
, &sym
->declared_at
);
14757 if (assumed_len_exprs
&& !(sym
->attr
.dummy
14758 || sym
->attr
.select_type_temporary
|| sym
->attr
.associate_var
))
14759 gfc_error ("The object %qs at %L with ASSUMED type parameters "
14760 "must be a dummy or a SELECT TYPE selector(F08/4.2)",
14761 sym
->name
, &sym
->declared_at
);
14765 /* Do anything necessary to resolve a symbol. Right now, we just
14766 assume that an otherwise unknown symbol is a variable. This sort
14767 of thing commonly happens for symbols in module. */
14770 resolve_symbol (gfc_symbol
*sym
)
14772 int check_constant
, mp_flag
;
14773 gfc_symtree
*symtree
;
14774 gfc_symtree
*this_symtree
;
14777 symbol_attribute class_attr
;
14778 gfc_array_spec
*as
;
14779 bool saved_specification_expr
;
14785 /* No symbol will ever have union type; only components can be unions.
14786 Union type declaration symbols have type BT_UNKNOWN but flavor FL_UNION
14787 (just like derived type declaration symbols have flavor FL_DERIVED). */
14788 gcc_assert (sym
->ts
.type
!= BT_UNION
);
14790 /* Coarrayed polymorphic objects with allocatable or pointer components are
14791 yet unsupported for -fcoarray=lib. */
14792 if (flag_coarray
== GFC_FCOARRAY_LIB
&& sym
->ts
.type
== BT_CLASS
14793 && sym
->ts
.u
.derived
&& CLASS_DATA (sym
)
14794 && CLASS_DATA (sym
)->attr
.codimension
14795 && (CLASS_DATA (sym
)->ts
.u
.derived
->attr
.alloc_comp
14796 || CLASS_DATA (sym
)->ts
.u
.derived
->attr
.pointer_comp
))
14798 gfc_error ("Sorry, allocatable/pointer components in polymorphic (CLASS) "
14799 "type coarrays at %L are unsupported", &sym
->declared_at
);
14803 if (sym
->attr
.artificial
)
14806 if (sym
->attr
.unlimited_polymorphic
)
14809 if (sym
->attr
.flavor
== FL_UNKNOWN
14810 || (sym
->attr
.flavor
== FL_PROCEDURE
&& !sym
->attr
.intrinsic
14811 && !sym
->attr
.generic
&& !sym
->attr
.external
14812 && sym
->attr
.if_source
== IFSRC_UNKNOWN
14813 && sym
->ts
.type
== BT_UNKNOWN
))
14816 /* If we find that a flavorless symbol is an interface in one of the
14817 parent namespaces, find its symtree in this namespace, free the
14818 symbol and set the symtree to point to the interface symbol. */
14819 for (ns
= gfc_current_ns
->parent
; ns
; ns
= ns
->parent
)
14821 symtree
= gfc_find_symtree (ns
->sym_root
, sym
->name
);
14822 if (symtree
&& (symtree
->n
.sym
->generic
||
14823 (symtree
->n
.sym
->attr
.flavor
== FL_PROCEDURE
14824 && sym
->ns
->construct_entities
)))
14826 this_symtree
= gfc_find_symtree (gfc_current_ns
->sym_root
,
14828 if (this_symtree
->n
.sym
== sym
)
14830 symtree
->n
.sym
->refs
++;
14831 gfc_release_symbol (sym
);
14832 this_symtree
->n
.sym
= symtree
->n
.sym
;
14838 /* Otherwise give it a flavor according to such attributes as
14840 if (sym
->attr
.flavor
== FL_UNKNOWN
&& sym
->attr
.external
== 0
14841 && sym
->attr
.intrinsic
== 0)
14842 sym
->attr
.flavor
= FL_VARIABLE
;
14843 else if (sym
->attr
.flavor
== FL_UNKNOWN
)
14845 sym
->attr
.flavor
= FL_PROCEDURE
;
14846 if (sym
->attr
.dimension
)
14847 sym
->attr
.function
= 1;
14851 if (sym
->attr
.external
&& sym
->ts
.type
!= BT_UNKNOWN
&& !sym
->attr
.function
)
14852 gfc_add_function (&sym
->attr
, sym
->name
, &sym
->declared_at
);
14854 if (sym
->attr
.procedure
&& sym
->attr
.if_source
!= IFSRC_DECL
14855 && !resolve_procedure_interface (sym
))
14858 if (sym
->attr
.is_protected
&& !sym
->attr
.proc_pointer
14859 && (sym
->attr
.procedure
|| sym
->attr
.external
))
14861 if (sym
->attr
.external
)
14862 gfc_error ("PROTECTED attribute conflicts with EXTERNAL attribute "
14863 "at %L", &sym
->declared_at
);
14865 gfc_error ("PROCEDURE attribute conflicts with PROTECTED attribute "
14866 "at %L", &sym
->declared_at
);
14871 if (sym
->attr
.flavor
== FL_DERIVED
&& !resolve_fl_derived (sym
))
14874 else if ((sym
->attr
.flavor
== FL_STRUCT
|| sym
->attr
.flavor
== FL_UNION
)
14875 && !resolve_fl_struct (sym
))
14878 /* Symbols that are module procedures with results (functions) have
14879 the types and array specification copied for type checking in
14880 procedures that call them, as well as for saving to a module
14881 file. These symbols can't stand the scrutiny that their results
14883 mp_flag
= (sym
->result
!= NULL
&& sym
->result
!= sym
);
14885 /* Make sure that the intrinsic is consistent with its internal
14886 representation. This needs to be done before assigning a default
14887 type to avoid spurious warnings. */
14888 if (sym
->attr
.flavor
!= FL_MODULE
&& sym
->attr
.intrinsic
14889 && !gfc_resolve_intrinsic (sym
, &sym
->declared_at
))
14892 /* Resolve associate names. */
14894 resolve_assoc_var (sym
, true);
14896 /* Assign default type to symbols that need one and don't have one. */
14897 if (sym
->ts
.type
== BT_UNKNOWN
)
14899 if (sym
->attr
.flavor
== FL_VARIABLE
|| sym
->attr
.flavor
== FL_PARAMETER
)
14901 gfc_set_default_type (sym
, 1, NULL
);
14904 if (sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.external
14905 && !sym
->attr
.function
&& !sym
->attr
.subroutine
14906 && gfc_get_default_type (sym
->name
, sym
->ns
)->type
== BT_UNKNOWN
)
14907 gfc_add_subroutine (&sym
->attr
, sym
->name
, &sym
->declared_at
);
14909 if (sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.function
)
14911 /* The specific case of an external procedure should emit an error
14912 in the case that there is no implicit type. */
14915 if (!sym
->attr
.mixed_entry_master
)
14916 gfc_set_default_type (sym
, sym
->attr
.external
, NULL
);
14920 /* Result may be in another namespace. */
14921 resolve_symbol (sym
->result
);
14923 if (!sym
->result
->attr
.proc_pointer
)
14925 sym
->ts
= sym
->result
->ts
;
14926 sym
->as
= gfc_copy_array_spec (sym
->result
->as
);
14927 sym
->attr
.dimension
= sym
->result
->attr
.dimension
;
14928 sym
->attr
.pointer
= sym
->result
->attr
.pointer
;
14929 sym
->attr
.allocatable
= sym
->result
->attr
.allocatable
;
14930 sym
->attr
.contiguous
= sym
->result
->attr
.contiguous
;
14935 else if (mp_flag
&& sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.function
)
14937 bool saved_specification_expr
= specification_expr
;
14938 specification_expr
= true;
14939 gfc_resolve_array_spec (sym
->result
->as
, false);
14940 specification_expr
= saved_specification_expr
;
14943 if (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
)
14945 as
= CLASS_DATA (sym
)->as
;
14946 class_attr
= CLASS_DATA (sym
)->attr
;
14947 class_attr
.pointer
= class_attr
.class_pointer
;
14951 class_attr
= sym
->attr
;
14956 if (sym
->attr
.contiguous
14957 && (!class_attr
.dimension
14958 || (as
->type
!= AS_ASSUMED_SHAPE
&& as
->type
!= AS_ASSUMED_RANK
14959 && !class_attr
.pointer
)))
14961 gfc_error ("%qs at %L has the CONTIGUOUS attribute but is not an "
14962 "array pointer or an assumed-shape or assumed-rank array",
14963 sym
->name
, &sym
->declared_at
);
14967 /* Assumed size arrays and assumed shape arrays must be dummy
14968 arguments. Array-spec's of implied-shape should have been resolved to
14969 AS_EXPLICIT already. */
14973 /* If AS_IMPLIED_SHAPE makes it to here, it must be a bad
14974 specification expression. */
14975 if (as
->type
== AS_IMPLIED_SHAPE
)
14978 for (i
=0; i
<as
->rank
; i
++)
14980 if (as
->lower
[i
] != NULL
&& as
->upper
[i
] == NULL
)
14982 gfc_error ("Bad specification for assumed size array at %L",
14983 &as
->lower
[i
]->where
);
14990 if (((as
->type
== AS_ASSUMED_SIZE
&& !as
->cp_was_assumed
)
14991 || as
->type
== AS_ASSUMED_SHAPE
)
14992 && !sym
->attr
.dummy
&& !sym
->attr
.select_type_temporary
)
14994 if (as
->type
== AS_ASSUMED_SIZE
)
14995 gfc_error ("Assumed size array at %L must be a dummy argument",
14996 &sym
->declared_at
);
14998 gfc_error ("Assumed shape array at %L must be a dummy argument",
14999 &sym
->declared_at
);
15002 /* TS 29113, C535a. */
15003 if (as
->type
== AS_ASSUMED_RANK
&& !sym
->attr
.dummy
15004 && !sym
->attr
.select_type_temporary
)
15006 gfc_error ("Assumed-rank array at %L must be a dummy argument",
15007 &sym
->declared_at
);
15010 if (as
->type
== AS_ASSUMED_RANK
15011 && (sym
->attr
.codimension
|| sym
->attr
.value
))
15013 gfc_error ("Assumed-rank array at %L may not have the VALUE or "
15014 "CODIMENSION attribute", &sym
->declared_at
);
15019 /* Make sure symbols with known intent or optional are really dummy
15020 variable. Because of ENTRY statement, this has to be deferred
15021 until resolution time. */
15023 if (!sym
->attr
.dummy
15024 && (sym
->attr
.optional
|| sym
->attr
.intent
!= INTENT_UNKNOWN
))
15026 gfc_error ("Symbol at %L is not a DUMMY variable", &sym
->declared_at
);
15030 if (sym
->attr
.value
&& !sym
->attr
.dummy
)
15032 gfc_error ("%qs at %L cannot have the VALUE attribute because "
15033 "it is not a dummy argument", sym
->name
, &sym
->declared_at
);
15037 if (sym
->attr
.value
&& sym
->ts
.type
== BT_CHARACTER
)
15039 gfc_charlen
*cl
= sym
->ts
.u
.cl
;
15040 if (!cl
|| !cl
->length
|| cl
->length
->expr_type
!= EXPR_CONSTANT
)
15042 gfc_error ("Character dummy variable %qs at %L with VALUE "
15043 "attribute must have constant length",
15044 sym
->name
, &sym
->declared_at
);
15048 if (sym
->ts
.is_c_interop
15049 && mpz_cmp_si (cl
->length
->value
.integer
, 1) != 0)
15051 gfc_error ("C interoperable character dummy variable %qs at %L "
15052 "with VALUE attribute must have length one",
15053 sym
->name
, &sym
->declared_at
);
15058 if (sym
->ts
.type
== BT_DERIVED
&& !sym
->attr
.is_iso_c
15059 && sym
->ts
.u
.derived
->attr
.generic
)
15061 sym
->ts
.u
.derived
= gfc_find_dt_in_generic (sym
->ts
.u
.derived
);
15062 if (!sym
->ts
.u
.derived
)
15064 gfc_error ("The derived type %qs at %L is of type %qs, "
15065 "which has not been defined", sym
->name
,
15066 &sym
->declared_at
, sym
->ts
.u
.derived
->name
);
15067 sym
->ts
.type
= BT_UNKNOWN
;
15072 /* Use the same constraints as TYPE(*), except for the type check
15073 and that only scalars and assumed-size arrays are permitted. */
15074 if (sym
->attr
.ext_attr
& (1 << EXT_ATTR_NO_ARG_CHECK
))
15076 if (!sym
->attr
.dummy
)
15078 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute shall be "
15079 "a dummy argument", sym
->name
, &sym
->declared_at
);
15083 if (sym
->ts
.type
!= BT_ASSUMED
&& sym
->ts
.type
!= BT_INTEGER
15084 && sym
->ts
.type
!= BT_REAL
&& sym
->ts
.type
!= BT_LOGICAL
15085 && sym
->ts
.type
!= BT_COMPLEX
)
15087 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute shall be "
15088 "of type TYPE(*) or of an numeric intrinsic type",
15089 sym
->name
, &sym
->declared_at
);
15093 if (sym
->attr
.allocatable
|| sym
->attr
.codimension
15094 || sym
->attr
.pointer
|| sym
->attr
.value
)
15096 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute may not "
15097 "have the ALLOCATABLE, CODIMENSION, POINTER or VALUE "
15098 "attribute", sym
->name
, &sym
->declared_at
);
15102 if (sym
->attr
.intent
== INTENT_OUT
)
15104 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute may not "
15105 "have the INTENT(OUT) attribute",
15106 sym
->name
, &sym
->declared_at
);
15109 if (sym
->attr
.dimension
&& sym
->as
->type
!= AS_ASSUMED_SIZE
)
15111 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute shall "
15112 "either be a scalar or an assumed-size array",
15113 sym
->name
, &sym
->declared_at
);
15117 /* Set the type to TYPE(*) and add a dimension(*) to ensure
15118 NO_ARG_CHECK is correctly handled in trans*.c, e.g. with
15120 sym
->ts
.type
= BT_ASSUMED
;
15121 sym
->as
= gfc_get_array_spec ();
15122 sym
->as
->type
= AS_ASSUMED_SIZE
;
15124 sym
->as
->lower
[0] = gfc_get_int_expr (gfc_default_integer_kind
, NULL
, 1);
15126 else if (sym
->ts
.type
== BT_ASSUMED
)
15128 /* TS 29113, C407a. */
15129 if (!sym
->attr
.dummy
)
15131 gfc_error ("Assumed type of variable %s at %L is only permitted "
15132 "for dummy variables", sym
->name
, &sym
->declared_at
);
15135 if (sym
->attr
.allocatable
|| sym
->attr
.codimension
15136 || sym
->attr
.pointer
|| sym
->attr
.value
)
15138 gfc_error ("Assumed-type variable %s at %L may not have the "
15139 "ALLOCATABLE, CODIMENSION, POINTER or VALUE attribute",
15140 sym
->name
, &sym
->declared_at
);
15143 if (sym
->attr
.intent
== INTENT_OUT
)
15145 gfc_error ("Assumed-type variable %s at %L may not have the "
15146 "INTENT(OUT) attribute",
15147 sym
->name
, &sym
->declared_at
);
15150 if (sym
->attr
.dimension
&& sym
->as
->type
== AS_EXPLICIT
)
15152 gfc_error ("Assumed-type variable %s at %L shall not be an "
15153 "explicit-shape array", sym
->name
, &sym
->declared_at
);
15158 /* If the symbol is marked as bind(c), that it is declared at module level
15159 scope and verify its type and kind. Do not do the latter for symbols
15160 that are implicitly typed because that is handled in
15161 gfc_set_default_type. Handle dummy arguments and procedure definitions
15162 separately. Also, anything that is use associated is not handled here
15163 but instead is handled in the module it is declared in. Finally, derived
15164 type definitions are allowed to be BIND(C) since that only implies that
15165 they're interoperable, and they are checked fully for interoperability
15166 when a variable is declared of that type. */
15167 if (sym
->attr
.is_bind_c
&& sym
->attr
.use_assoc
== 0
15168 && sym
->attr
.dummy
== 0 && sym
->attr
.flavor
!= FL_PROCEDURE
15169 && sym
->attr
.flavor
!= FL_DERIVED
)
15173 /* First, make sure the variable is declared at the
15174 module-level scope (J3/04-007, Section 15.3). */
15175 if (sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
&&
15176 sym
->attr
.in_common
== 0)
15178 gfc_error ("Variable %qs at %L cannot be BIND(C) because it "
15179 "is neither a COMMON block nor declared at the "
15180 "module level scope", sym
->name
, &(sym
->declared_at
));
15183 else if (sym
->ts
.type
== BT_CHARACTER
15184 && (sym
->ts
.u
.cl
== NULL
|| sym
->ts
.u
.cl
->length
== NULL
15185 || !gfc_is_constant_expr (sym
->ts
.u
.cl
->length
)
15186 || mpz_cmp_si (sym
->ts
.u
.cl
->length
->value
.integer
, 1) != 0))
15188 gfc_error ("BIND(C) Variable %qs at %L must have length one",
15189 sym
->name
, &sym
->declared_at
);
15192 else if (sym
->common_head
!= NULL
&& sym
->attr
.implicit_type
== 0)
15194 t
= verify_com_block_vars_c_interop (sym
->common_head
);
15196 else if (sym
->attr
.implicit_type
== 0)
15198 /* If type() declaration, we need to verify that the components
15199 of the given type are all C interoperable, etc. */
15200 if (sym
->ts
.type
== BT_DERIVED
&&
15201 sym
->ts
.u
.derived
->attr
.is_c_interop
!= 1)
15203 /* Make sure the user marked the derived type as BIND(C). If
15204 not, call the verify routine. This could print an error
15205 for the derived type more than once if multiple variables
15206 of that type are declared. */
15207 if (sym
->ts
.u
.derived
->attr
.is_bind_c
!= 1)
15208 verify_bind_c_derived_type (sym
->ts
.u
.derived
);
15212 /* Verify the variable itself as C interoperable if it
15213 is BIND(C). It is not possible for this to succeed if
15214 the verify_bind_c_derived_type failed, so don't have to handle
15215 any error returned by verify_bind_c_derived_type. */
15216 t
= verify_bind_c_sym (sym
, &(sym
->ts
), sym
->attr
.in_common
,
15217 sym
->common_block
);
15222 /* clear the is_bind_c flag to prevent reporting errors more than
15223 once if something failed. */
15224 sym
->attr
.is_bind_c
= 0;
15229 /* If a derived type symbol has reached this point, without its
15230 type being declared, we have an error. Notice that most
15231 conditions that produce undefined derived types have already
15232 been dealt with. However, the likes of:
15233 implicit type(t) (t) ..... call foo (t) will get us here if
15234 the type is not declared in the scope of the implicit
15235 statement. Change the type to BT_UNKNOWN, both because it is so
15236 and to prevent an ICE. */
15237 if (sym
->ts
.type
== BT_DERIVED
&& !sym
->attr
.is_iso_c
15238 && sym
->ts
.u
.derived
->components
== NULL
15239 && !sym
->ts
.u
.derived
->attr
.zero_comp
)
15241 gfc_error ("The derived type %qs at %L is of type %qs, "
15242 "which has not been defined", sym
->name
,
15243 &sym
->declared_at
, sym
->ts
.u
.derived
->name
);
15244 sym
->ts
.type
= BT_UNKNOWN
;
15248 /* Make sure that the derived type has been resolved and that the
15249 derived type is visible in the symbol's namespace, if it is a
15250 module function and is not PRIVATE. */
15251 if (sym
->ts
.type
== BT_DERIVED
15252 && sym
->ts
.u
.derived
->attr
.use_assoc
15253 && sym
->ns
->proc_name
15254 && sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
15255 && !resolve_fl_derived (sym
->ts
.u
.derived
))
15258 /* Unless the derived-type declaration is use associated, Fortran 95
15259 does not allow public entries of private derived types.
15260 See 4.4.1 (F95) and 4.5.1.1 (F2003); and related interpretation
15261 161 in 95-006r3. */
15262 if (sym
->ts
.type
== BT_DERIVED
15263 && sym
->ns
->proc_name
&& sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
15264 && !sym
->ts
.u
.derived
->attr
.use_assoc
15265 && gfc_check_symbol_access (sym
)
15266 && !gfc_check_symbol_access (sym
->ts
.u
.derived
)
15267 && !gfc_notify_std (GFC_STD_F2003
, "PUBLIC %s %qs at %L of PRIVATE "
15268 "derived type %qs",
15269 (sym
->attr
.flavor
== FL_PARAMETER
)
15270 ? "parameter" : "variable",
15271 sym
->name
, &sym
->declared_at
,
15272 sym
->ts
.u
.derived
->name
))
15275 /* F2008, C1302. */
15276 if (sym
->ts
.type
== BT_DERIVED
15277 && ((sym
->ts
.u
.derived
->from_intmod
== INTMOD_ISO_FORTRAN_ENV
15278 && sym
->ts
.u
.derived
->intmod_sym_id
== ISOFORTRAN_LOCK_TYPE
)
15279 || sym
->ts
.u
.derived
->attr
.lock_comp
)
15280 && !sym
->attr
.codimension
&& !sym
->ts
.u
.derived
->attr
.coarray_comp
)
15282 gfc_error ("Variable %s at %L of type LOCK_TYPE or with subcomponent of "
15283 "type LOCK_TYPE must be a coarray", sym
->name
,
15284 &sym
->declared_at
);
15288 /* TS18508, C702/C703. */
15289 if (sym
->ts
.type
== BT_DERIVED
15290 && ((sym
->ts
.u
.derived
->from_intmod
== INTMOD_ISO_FORTRAN_ENV
15291 && sym
->ts
.u
.derived
->intmod_sym_id
== ISOFORTRAN_EVENT_TYPE
)
15292 || sym
->ts
.u
.derived
->attr
.event_comp
)
15293 && !sym
->attr
.codimension
&& !sym
->ts
.u
.derived
->attr
.coarray_comp
)
15295 gfc_error ("Variable %s at %L of type EVENT_TYPE or with subcomponent of "
15296 "type EVENT_TYPE must be a coarray", sym
->name
,
15297 &sym
->declared_at
);
15301 /* An assumed-size array with INTENT(OUT) shall not be of a type for which
15302 default initialization is defined (5.1.2.4.4). */
15303 if (sym
->ts
.type
== BT_DERIVED
15305 && sym
->attr
.intent
== INTENT_OUT
15307 && sym
->as
->type
== AS_ASSUMED_SIZE
)
15309 for (c
= sym
->ts
.u
.derived
->components
; c
; c
= c
->next
)
15311 if (c
->initializer
)
15313 gfc_error ("The INTENT(OUT) dummy argument %qs at %L is "
15314 "ASSUMED SIZE and so cannot have a default initializer",
15315 sym
->name
, &sym
->declared_at
);
15322 if (sym
->ts
.type
== BT_DERIVED
&& sym
->attr
.dummy
15323 && sym
->attr
.intent
== INTENT_OUT
&& sym
->attr
.lock_comp
)
15325 gfc_error ("Dummy argument %qs at %L of LOCK_TYPE shall not be "
15326 "INTENT(OUT)", sym
->name
, &sym
->declared_at
);
15331 if (sym
->ts
.type
== BT_DERIVED
&& sym
->attr
.dummy
15332 && sym
->attr
.intent
== INTENT_OUT
&& sym
->attr
.event_comp
)
15334 gfc_error ("Dummy argument %qs at %L of EVENT_TYPE shall not be "
15335 "INTENT(OUT)", sym
->name
, &sym
->declared_at
);
15340 if ((((sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
->attr
.coarray_comp
)
15341 || (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
15342 && CLASS_DATA (sym
)->attr
.coarray_comp
))
15343 || class_attr
.codimension
)
15344 && (sym
->attr
.result
|| sym
->result
== sym
))
15346 gfc_error ("Function result %qs at %L shall not be a coarray or have "
15347 "a coarray component", sym
->name
, &sym
->declared_at
);
15352 if (sym
->attr
.codimension
&& sym
->ts
.type
== BT_DERIVED
15353 && sym
->ts
.u
.derived
->ts
.is_iso_c
)
15355 gfc_error ("Variable %qs at %L of TYPE(C_PTR) or TYPE(C_FUNPTR) "
15356 "shall not be a coarray", sym
->name
, &sym
->declared_at
);
15361 if (((sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
->attr
.coarray_comp
)
15362 || (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
15363 && CLASS_DATA (sym
)->attr
.coarray_comp
))
15364 && (class_attr
.codimension
|| class_attr
.pointer
|| class_attr
.dimension
15365 || class_attr
.allocatable
))
15367 gfc_error ("Variable %qs at %L with coarray component shall be a "
15368 "nonpointer, nonallocatable scalar, which is not a coarray",
15369 sym
->name
, &sym
->declared_at
);
15373 /* F2008, C526. The function-result case was handled above. */
15374 if (class_attr
.codimension
15375 && !(class_attr
.allocatable
|| sym
->attr
.dummy
|| sym
->attr
.save
15376 || sym
->attr
.select_type_temporary
15377 || sym
->attr
.associate_var
15378 || (sym
->ns
->save_all
&& !sym
->attr
.automatic
)
15379 || sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
15380 || sym
->ns
->proc_name
->attr
.is_main_program
15381 || sym
->attr
.function
|| sym
->attr
.result
|| sym
->attr
.use_assoc
))
15383 gfc_error ("Variable %qs at %L is a coarray and is not ALLOCATABLE, SAVE "
15384 "nor a dummy argument", sym
->name
, &sym
->declared_at
);
15388 else if (class_attr
.codimension
&& !sym
->attr
.select_type_temporary
15389 && !class_attr
.allocatable
&& as
&& as
->cotype
== AS_DEFERRED
)
15391 gfc_error ("Coarray variable %qs at %L shall not have codimensions with "
15392 "deferred shape", sym
->name
, &sym
->declared_at
);
15395 else if (class_attr
.codimension
&& class_attr
.allocatable
&& as
15396 && (as
->cotype
!= AS_DEFERRED
|| as
->type
!= AS_DEFERRED
))
15398 gfc_error ("Allocatable coarray variable %qs at %L must have "
15399 "deferred shape", sym
->name
, &sym
->declared_at
);
15404 if ((((sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
->attr
.coarray_comp
)
15405 || (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
15406 && CLASS_DATA (sym
)->attr
.coarray_comp
))
15407 || (class_attr
.codimension
&& class_attr
.allocatable
))
15408 && sym
->attr
.dummy
&& sym
->attr
.intent
== INTENT_OUT
)
15410 gfc_error ("Variable %qs at %L is INTENT(OUT) and can thus not be an "
15411 "allocatable coarray or have coarray components",
15412 sym
->name
, &sym
->declared_at
);
15416 if (class_attr
.codimension
&& sym
->attr
.dummy
15417 && sym
->ns
->proc_name
&& sym
->ns
->proc_name
->attr
.is_bind_c
)
15419 gfc_error ("Coarray dummy variable %qs at %L not allowed in BIND(C) "
15420 "procedure %qs", sym
->name
, &sym
->declared_at
,
15421 sym
->ns
->proc_name
->name
);
15425 if (sym
->ts
.type
== BT_LOGICAL
15426 && ((sym
->attr
.function
&& sym
->attr
.is_bind_c
&& sym
->result
== sym
)
15427 || ((sym
->attr
.dummy
|| sym
->attr
.result
) && sym
->ns
->proc_name
15428 && sym
->ns
->proc_name
->attr
.is_bind_c
)))
15431 for (i
= 0; gfc_logical_kinds
[i
].kind
; i
++)
15432 if (gfc_logical_kinds
[i
].kind
== sym
->ts
.kind
)
15434 if (!gfc_logical_kinds
[i
].c_bool
&& sym
->attr
.dummy
15435 && !gfc_notify_std (GFC_STD_GNU
, "LOGICAL dummy argument %qs at "
15436 "%L with non-C_Bool kind in BIND(C) procedure "
15437 "%qs", sym
->name
, &sym
->declared_at
,
15438 sym
->ns
->proc_name
->name
))
15440 else if (!gfc_logical_kinds
[i
].c_bool
15441 && !gfc_notify_std (GFC_STD_GNU
, "LOGICAL result variable "
15442 "%qs at %L with non-C_Bool kind in "
15443 "BIND(C) procedure %qs", sym
->name
,
15445 sym
->attr
.function
? sym
->name
15446 : sym
->ns
->proc_name
->name
))
15450 switch (sym
->attr
.flavor
)
15453 if (!resolve_fl_variable (sym
, mp_flag
))
15458 if (sym
->formal
&& !sym
->formal_ns
)
15460 /* Check that none of the arguments are a namelist. */
15461 gfc_formal_arglist
*formal
= sym
->formal
;
15463 for (; formal
; formal
= formal
->next
)
15464 if (formal
->sym
&& formal
->sym
->attr
.flavor
== FL_NAMELIST
)
15466 gfc_error ("Namelist %qs cannot be an argument to "
15467 "subroutine or function at %L",
15468 formal
->sym
->name
, &sym
->declared_at
);
15473 if (!resolve_fl_procedure (sym
, mp_flag
))
15478 if (!resolve_fl_namelist (sym
))
15483 if (!resolve_fl_parameter (sym
))
15491 /* Resolve array specifier. Check as well some constraints
15492 on COMMON blocks. */
15494 check_constant
= sym
->attr
.in_common
&& !sym
->attr
.pointer
;
15496 /* Set the formal_arg_flag so that check_conflict will not throw
15497 an error for host associated variables in the specification
15498 expression for an array_valued function. */
15499 if ((sym
->attr
.function
|| sym
->attr
.result
) && sym
->as
)
15500 formal_arg_flag
= true;
15502 saved_specification_expr
= specification_expr
;
15503 specification_expr
= true;
15504 gfc_resolve_array_spec (sym
->as
, check_constant
);
15505 specification_expr
= saved_specification_expr
;
15507 formal_arg_flag
= false;
15509 /* Resolve formal namespaces. */
15510 if (sym
->formal_ns
&& sym
->formal_ns
!= gfc_current_ns
15511 && !sym
->attr
.contained
&& !sym
->attr
.intrinsic
)
15512 gfc_resolve (sym
->formal_ns
);
15514 /* Make sure the formal namespace is present. */
15515 if (sym
->formal
&& !sym
->formal_ns
)
15517 gfc_formal_arglist
*formal
= sym
->formal
;
15518 while (formal
&& !formal
->sym
)
15519 formal
= formal
->next
;
15523 sym
->formal_ns
= formal
->sym
->ns
;
15524 if (sym
->ns
!= formal
->sym
->ns
)
15525 sym
->formal_ns
->refs
++;
15529 /* Check threadprivate restrictions. */
15530 if (sym
->attr
.threadprivate
&& !sym
->attr
.save
15531 && !(sym
->ns
->save_all
&& !sym
->attr
.automatic
)
15532 && (!sym
->attr
.in_common
15533 && sym
->module
== NULL
15534 && (sym
->ns
->proc_name
== NULL
15535 || sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
)))
15536 gfc_error ("Threadprivate at %L isn't SAVEd", &sym
->declared_at
);
15538 /* Check omp declare target restrictions. */
15539 if (sym
->attr
.omp_declare_target
15540 && sym
->attr
.flavor
== FL_VARIABLE
15542 && !(sym
->ns
->save_all
&& !sym
->attr
.automatic
)
15543 && (!sym
->attr
.in_common
15544 && sym
->module
== NULL
15545 && (sym
->ns
->proc_name
== NULL
15546 || sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
)))
15547 gfc_error ("!$OMP DECLARE TARGET variable %qs at %L isn't SAVEd",
15548 sym
->name
, &sym
->declared_at
);
15550 /* If we have come this far we can apply default-initializers, as
15551 described in 14.7.5, to those variables that have not already
15552 been assigned one. */
15553 if (sym
->ts
.type
== BT_DERIVED
15555 && !sym
->attr
.allocatable
15556 && !sym
->attr
.alloc_comp
)
15558 symbol_attribute
*a
= &sym
->attr
;
15560 if ((!a
->save
&& !a
->dummy
&& !a
->pointer
15561 && !a
->in_common
&& !a
->use_assoc
15563 && !((a
->function
|| a
->result
)
15565 || sym
->ts
.u
.derived
->attr
.alloc_comp
15566 || sym
->ts
.u
.derived
->attr
.pointer_comp
))
15567 && !(a
->function
&& sym
!= sym
->result
))
15568 || (a
->dummy
&& a
->intent
== INTENT_OUT
&& !a
->pointer
))
15569 apply_default_init (sym
);
15570 else if (a
->function
&& sym
->result
&& a
->access
!= ACCESS_PRIVATE
15571 && (sym
->ts
.u
.derived
->attr
.alloc_comp
15572 || sym
->ts
.u
.derived
->attr
.pointer_comp
))
15573 /* Mark the result symbol to be referenced, when it has allocatable
15575 sym
->result
->attr
.referenced
= 1;
15578 if (sym
->ts
.type
== BT_CLASS
&& sym
->ns
== gfc_current_ns
15579 && sym
->attr
.dummy
&& sym
->attr
.intent
== INTENT_OUT
15580 && !CLASS_DATA (sym
)->attr
.class_pointer
15581 && !CLASS_DATA (sym
)->attr
.allocatable
)
15582 apply_default_init (sym
);
15584 /* If this symbol has a type-spec, check it. */
15585 if (sym
->attr
.flavor
== FL_VARIABLE
|| sym
->attr
.flavor
== FL_PARAMETER
15586 || (sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.function
))
15587 if (!resolve_typespec_used (&sym
->ts
, &sym
->declared_at
, sym
->name
))
15590 if (sym
->param_list
)
15595 /************* Resolve DATA statements *************/
15599 gfc_data_value
*vnode
;
15605 /* Advance the values structure to point to the next value in the data list. */
15608 next_data_value (void)
15610 while (mpz_cmp_ui (values
.left
, 0) == 0)
15613 if (values
.vnode
->next
== NULL
)
15616 values
.vnode
= values
.vnode
->next
;
15617 mpz_set (values
.left
, values
.vnode
->repeat
);
15625 check_data_variable (gfc_data_variable
*var
, locus
*where
)
15631 ar_type mark
= AR_UNKNOWN
;
15633 mpz_t section_index
[GFC_MAX_DIMENSIONS
];
15639 if (!gfc_resolve_expr (var
->expr
))
15643 mpz_init_set_si (offset
, 0);
15646 if (e
->expr_type
== EXPR_FUNCTION
&& e
->value
.function
.isym
15647 && e
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
)
15648 e
= e
->value
.function
.actual
->expr
;
15650 if (e
->expr_type
!= EXPR_VARIABLE
)
15652 gfc_error ("Expecting definable entity near %L", where
);
15656 sym
= e
->symtree
->n
.sym
;
15658 if (sym
->ns
->is_block_data
&& !sym
->attr
.in_common
)
15660 gfc_error ("BLOCK DATA element %qs at %L must be in COMMON",
15661 sym
->name
, &sym
->declared_at
);
15665 if (e
->ref
== NULL
&& sym
->as
)
15667 gfc_error ("DATA array %qs at %L must be specified in a previous"
15668 " declaration", sym
->name
, where
);
15672 has_pointer
= sym
->attr
.pointer
;
15674 if (gfc_is_coindexed (e
))
15676 gfc_error ("DATA element %qs at %L cannot have a coindex", sym
->name
,
15681 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
15683 if (ref
->type
== REF_COMPONENT
&& ref
->u
.c
.component
->attr
.pointer
)
15687 && ref
->type
== REF_ARRAY
15688 && ref
->u
.ar
.type
!= AR_FULL
)
15690 gfc_error ("DATA element %qs at %L is a pointer and so must "
15691 "be a full array", sym
->name
, where
);
15696 if (e
->rank
== 0 || has_pointer
)
15698 mpz_init_set_ui (size
, 1);
15705 /* Find the array section reference. */
15706 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
15708 if (ref
->type
!= REF_ARRAY
)
15710 if (ref
->u
.ar
.type
== AR_ELEMENT
)
15716 /* Set marks according to the reference pattern. */
15717 switch (ref
->u
.ar
.type
)
15725 /* Get the start position of array section. */
15726 gfc_get_section_index (ar
, section_index
, &offset
);
15731 gcc_unreachable ();
15734 if (!gfc_array_size (e
, &size
))
15736 gfc_error ("Nonconstant array section at %L in DATA statement",
15738 mpz_clear (offset
);
15745 while (mpz_cmp_ui (size
, 0) > 0)
15747 if (!next_data_value ())
15749 gfc_error ("DATA statement at %L has more variables than values",
15755 t
= gfc_check_assign (var
->expr
, values
.vnode
->expr
, 0);
15759 /* If we have more than one element left in the repeat count,
15760 and we have more than one element left in the target variable,
15761 then create a range assignment. */
15762 /* FIXME: Only done for full arrays for now, since array sections
15764 if (mark
== AR_FULL
&& ref
&& ref
->next
== NULL
15765 && mpz_cmp_ui (values
.left
, 1) > 0 && mpz_cmp_ui (size
, 1) > 0)
15769 if (mpz_cmp (size
, values
.left
) >= 0)
15771 mpz_init_set (range
, values
.left
);
15772 mpz_sub (size
, size
, values
.left
);
15773 mpz_set_ui (values
.left
, 0);
15777 mpz_init_set (range
, size
);
15778 mpz_sub (values
.left
, values
.left
, size
);
15779 mpz_set_ui (size
, 0);
15782 t
= gfc_assign_data_value (var
->expr
, values
.vnode
->expr
,
15785 mpz_add (offset
, offset
, range
);
15792 /* Assign initial value to symbol. */
15795 mpz_sub_ui (values
.left
, values
.left
, 1);
15796 mpz_sub_ui (size
, size
, 1);
15798 t
= gfc_assign_data_value (var
->expr
, values
.vnode
->expr
,
15803 if (mark
== AR_FULL
)
15804 mpz_add_ui (offset
, offset
, 1);
15806 /* Modify the array section indexes and recalculate the offset
15807 for next element. */
15808 else if (mark
== AR_SECTION
)
15809 gfc_advance_section (section_index
, ar
, &offset
);
15813 if (mark
== AR_SECTION
)
15815 for (i
= 0; i
< ar
->dimen
; i
++)
15816 mpz_clear (section_index
[i
]);
15820 mpz_clear (offset
);
15826 static bool traverse_data_var (gfc_data_variable
*, locus
*);
15828 /* Iterate over a list of elements in a DATA statement. */
15831 traverse_data_list (gfc_data_variable
*var
, locus
*where
)
15834 iterator_stack frame
;
15835 gfc_expr
*e
, *start
, *end
, *step
;
15836 bool retval
= true;
15838 mpz_init (frame
.value
);
15841 start
= gfc_copy_expr (var
->iter
.start
);
15842 end
= gfc_copy_expr (var
->iter
.end
);
15843 step
= gfc_copy_expr (var
->iter
.step
);
15845 if (!gfc_simplify_expr (start
, 1)
15846 || start
->expr_type
!= EXPR_CONSTANT
)
15848 gfc_error ("start of implied-do loop at %L could not be "
15849 "simplified to a constant value", &start
->where
);
15853 if (!gfc_simplify_expr (end
, 1)
15854 || end
->expr_type
!= EXPR_CONSTANT
)
15856 gfc_error ("end of implied-do loop at %L could not be "
15857 "simplified to a constant value", &start
->where
);
15861 if (!gfc_simplify_expr (step
, 1)
15862 || step
->expr_type
!= EXPR_CONSTANT
)
15864 gfc_error ("step of implied-do loop at %L could not be "
15865 "simplified to a constant value", &start
->where
);
15870 mpz_set (trip
, end
->value
.integer
);
15871 mpz_sub (trip
, trip
, start
->value
.integer
);
15872 mpz_add (trip
, trip
, step
->value
.integer
);
15874 mpz_div (trip
, trip
, step
->value
.integer
);
15876 mpz_set (frame
.value
, start
->value
.integer
);
15878 frame
.prev
= iter_stack
;
15879 frame
.variable
= var
->iter
.var
->symtree
;
15880 iter_stack
= &frame
;
15882 while (mpz_cmp_ui (trip
, 0) > 0)
15884 if (!traverse_data_var (var
->list
, where
))
15890 e
= gfc_copy_expr (var
->expr
);
15891 if (!gfc_simplify_expr (e
, 1))
15898 mpz_add (frame
.value
, frame
.value
, step
->value
.integer
);
15900 mpz_sub_ui (trip
, trip
, 1);
15904 mpz_clear (frame
.value
);
15907 gfc_free_expr (start
);
15908 gfc_free_expr (end
);
15909 gfc_free_expr (step
);
15911 iter_stack
= frame
.prev
;
15916 /* Type resolve variables in the variable list of a DATA statement. */
15919 traverse_data_var (gfc_data_variable
*var
, locus
*where
)
15923 for (; var
; var
= var
->next
)
15925 if (var
->expr
== NULL
)
15926 t
= traverse_data_list (var
, where
);
15928 t
= check_data_variable (var
, where
);
15938 /* Resolve the expressions and iterators associated with a data statement.
15939 This is separate from the assignment checking because data lists should
15940 only be resolved once. */
15943 resolve_data_variables (gfc_data_variable
*d
)
15945 for (; d
; d
= d
->next
)
15947 if (d
->list
== NULL
)
15949 if (!gfc_resolve_expr (d
->expr
))
15954 if (!gfc_resolve_iterator (&d
->iter
, false, true))
15957 if (!resolve_data_variables (d
->list
))
15966 /* Resolve a single DATA statement. We implement this by storing a pointer to
15967 the value list into static variables, and then recursively traversing the
15968 variables list, expanding iterators and such. */
15971 resolve_data (gfc_data
*d
)
15974 if (!resolve_data_variables (d
->var
))
15977 values
.vnode
= d
->value
;
15978 if (d
->value
== NULL
)
15979 mpz_set_ui (values
.left
, 0);
15981 mpz_set (values
.left
, d
->value
->repeat
);
15983 if (!traverse_data_var (d
->var
, &d
->where
))
15986 /* At this point, we better not have any values left. */
15988 if (next_data_value ())
15989 gfc_error ("DATA statement at %L has more values than variables",
15994 /* 12.6 Constraint: In a pure subprogram any variable which is in common or
15995 accessed by host or use association, is a dummy argument to a pure function,
15996 is a dummy argument with INTENT (IN) to a pure subroutine, or an object that
15997 is storage associated with any such variable, shall not be used in the
15998 following contexts: (clients of this function). */
16000 /* Determines if a variable is not 'pure', i.e., not assignable within a pure
16001 procedure. Returns zero if assignment is OK, nonzero if there is a
16004 gfc_impure_variable (gfc_symbol
*sym
)
16009 if (sym
->attr
.use_assoc
|| sym
->attr
.in_common
)
16012 /* Check if the symbol's ns is inside the pure procedure. */
16013 for (ns
= gfc_current_ns
; ns
; ns
= ns
->parent
)
16017 if (ns
->proc_name
->attr
.flavor
== FL_PROCEDURE
&& !sym
->attr
.function
)
16021 proc
= sym
->ns
->proc_name
;
16022 if (sym
->attr
.dummy
16023 && ((proc
->attr
.subroutine
&& sym
->attr
.intent
== INTENT_IN
)
16024 || proc
->attr
.function
))
16027 /* TODO: Sort out what can be storage associated, if anything, and include
16028 it here. In principle equivalences should be scanned but it does not
16029 seem to be possible to storage associate an impure variable this way. */
16034 /* Test whether a symbol is pure or not. For a NULL pointer, checks if the
16035 current namespace is inside a pure procedure. */
16038 gfc_pure (gfc_symbol
*sym
)
16040 symbol_attribute attr
;
16045 /* Check if the current namespace or one of its parents
16046 belongs to a pure procedure. */
16047 for (ns
= gfc_current_ns
; ns
; ns
= ns
->parent
)
16049 sym
= ns
->proc_name
;
16053 if (attr
.flavor
== FL_PROCEDURE
&& attr
.pure
)
16061 return attr
.flavor
== FL_PROCEDURE
&& attr
.pure
;
16065 /* Test whether a symbol is implicitly pure or not. For a NULL pointer,
16066 checks if the current namespace is implicitly pure. Note that this
16067 function returns false for a PURE procedure. */
16070 gfc_implicit_pure (gfc_symbol
*sym
)
16076 /* Check if the current procedure is implicit_pure. Walk up
16077 the procedure list until we find a procedure. */
16078 for (ns
= gfc_current_ns
; ns
; ns
= ns
->parent
)
16080 sym
= ns
->proc_name
;
16084 if (sym
->attr
.flavor
== FL_PROCEDURE
)
16089 return sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.implicit_pure
16090 && !sym
->attr
.pure
;
16095 gfc_unset_implicit_pure (gfc_symbol
*sym
)
16101 /* Check if the current procedure is implicit_pure. Walk up
16102 the procedure list until we find a procedure. */
16103 for (ns
= gfc_current_ns
; ns
; ns
= ns
->parent
)
16105 sym
= ns
->proc_name
;
16109 if (sym
->attr
.flavor
== FL_PROCEDURE
)
16114 if (sym
->attr
.flavor
== FL_PROCEDURE
)
16115 sym
->attr
.implicit_pure
= 0;
16117 sym
->attr
.pure
= 0;
16121 /* Test whether the current procedure is elemental or not. */
16124 gfc_elemental (gfc_symbol
*sym
)
16126 symbol_attribute attr
;
16129 sym
= gfc_current_ns
->proc_name
;
16134 return attr
.flavor
== FL_PROCEDURE
&& attr
.elemental
;
16138 /* Warn about unused labels. */
16141 warn_unused_fortran_label (gfc_st_label
*label
)
16146 warn_unused_fortran_label (label
->left
);
16148 if (label
->defined
== ST_LABEL_UNKNOWN
)
16151 switch (label
->referenced
)
16153 case ST_LABEL_UNKNOWN
:
16154 gfc_warning (OPT_Wunused_label
, "Label %d at %L defined but not used",
16155 label
->value
, &label
->where
);
16158 case ST_LABEL_BAD_TARGET
:
16159 gfc_warning (OPT_Wunused_label
,
16160 "Label %d at %L defined but cannot be used",
16161 label
->value
, &label
->where
);
16168 warn_unused_fortran_label (label
->right
);
16172 /* Returns the sequence type of a symbol or sequence. */
16175 sequence_type (gfc_typespec ts
)
16184 if (ts
.u
.derived
->components
== NULL
)
16185 return SEQ_NONDEFAULT
;
16187 result
= sequence_type (ts
.u
.derived
->components
->ts
);
16188 for (c
= ts
.u
.derived
->components
->next
; c
; c
= c
->next
)
16189 if (sequence_type (c
->ts
) != result
)
16195 if (ts
.kind
!= gfc_default_character_kind
)
16196 return SEQ_NONDEFAULT
;
16198 return SEQ_CHARACTER
;
16201 if (ts
.kind
!= gfc_default_integer_kind
)
16202 return SEQ_NONDEFAULT
;
16204 return SEQ_NUMERIC
;
16207 if (!(ts
.kind
== gfc_default_real_kind
16208 || ts
.kind
== gfc_default_double_kind
))
16209 return SEQ_NONDEFAULT
;
16211 return SEQ_NUMERIC
;
16214 if (ts
.kind
!= gfc_default_complex_kind
)
16215 return SEQ_NONDEFAULT
;
16217 return SEQ_NUMERIC
;
16220 if (ts
.kind
!= gfc_default_logical_kind
)
16221 return SEQ_NONDEFAULT
;
16223 return SEQ_NUMERIC
;
16226 return SEQ_NONDEFAULT
;
16231 /* Resolve derived type EQUIVALENCE object. */
16234 resolve_equivalence_derived (gfc_symbol
*derived
, gfc_symbol
*sym
, gfc_expr
*e
)
16236 gfc_component
*c
= derived
->components
;
16241 /* Shall not be an object of nonsequence derived type. */
16242 if (!derived
->attr
.sequence
)
16244 gfc_error ("Derived type variable %qs at %L must have SEQUENCE "
16245 "attribute to be an EQUIVALENCE object", sym
->name
,
16250 /* Shall not have allocatable components. */
16251 if (derived
->attr
.alloc_comp
)
16253 gfc_error ("Derived type variable %qs at %L cannot have ALLOCATABLE "
16254 "components to be an EQUIVALENCE object",sym
->name
,
16259 if (sym
->attr
.in_common
&& gfc_has_default_initializer (sym
->ts
.u
.derived
))
16261 gfc_error ("Derived type variable %qs at %L with default "
16262 "initialization cannot be in EQUIVALENCE with a variable "
16263 "in COMMON", sym
->name
, &e
->where
);
16267 for (; c
; c
= c
->next
)
16269 if (gfc_bt_struct (c
->ts
.type
)
16270 && (!resolve_equivalence_derived(c
->ts
.u
.derived
, sym
, e
)))
16273 /* Shall not be an object of sequence derived type containing a pointer
16274 in the structure. */
16275 if (c
->attr
.pointer
)
16277 gfc_error ("Derived type variable %qs at %L with pointer "
16278 "component(s) cannot be an EQUIVALENCE object",
16279 sym
->name
, &e
->where
);
16287 /* Resolve equivalence object.
16288 An EQUIVALENCE object shall not be a dummy argument, a pointer, a target,
16289 an allocatable array, an object of nonsequence derived type, an object of
16290 sequence derived type containing a pointer at any level of component
16291 selection, an automatic object, a function name, an entry name, a result
16292 name, a named constant, a structure component, or a subobject of any of
16293 the preceding objects. A substring shall not have length zero. A
16294 derived type shall not have components with default initialization nor
16295 shall two objects of an equivalence group be initialized.
16296 Either all or none of the objects shall have an protected attribute.
16297 The simple constraints are done in symbol.c(check_conflict) and the rest
16298 are implemented here. */
16301 resolve_equivalence (gfc_equiv
*eq
)
16304 gfc_symbol
*first_sym
;
16307 locus
*last_where
= NULL
;
16308 seq_type eq_type
, last_eq_type
;
16309 gfc_typespec
*last_ts
;
16310 int object
, cnt_protected
;
16313 last_ts
= &eq
->expr
->symtree
->n
.sym
->ts
;
16315 first_sym
= eq
->expr
->symtree
->n
.sym
;
16319 for (object
= 1; eq
; eq
= eq
->eq
, object
++)
16323 e
->ts
= e
->symtree
->n
.sym
->ts
;
16324 /* match_varspec might not know yet if it is seeing
16325 array reference or substring reference, as it doesn't
16327 if (e
->ref
&& e
->ref
->type
== REF_ARRAY
)
16329 gfc_ref
*ref
= e
->ref
;
16330 sym
= e
->symtree
->n
.sym
;
16332 if (sym
->attr
.dimension
)
16334 ref
->u
.ar
.as
= sym
->as
;
16338 /* For substrings, convert REF_ARRAY into REF_SUBSTRING. */
16339 if (e
->ts
.type
== BT_CHARACTER
16341 && ref
->type
== REF_ARRAY
16342 && ref
->u
.ar
.dimen
== 1
16343 && ref
->u
.ar
.dimen_type
[0] == DIMEN_RANGE
16344 && ref
->u
.ar
.stride
[0] == NULL
)
16346 gfc_expr
*start
= ref
->u
.ar
.start
[0];
16347 gfc_expr
*end
= ref
->u
.ar
.end
[0];
16350 /* Optimize away the (:) reference. */
16351 if (start
== NULL
&& end
== NULL
)
16354 e
->ref
= ref
->next
;
16356 e
->ref
->next
= ref
->next
;
16361 ref
->type
= REF_SUBSTRING
;
16363 start
= gfc_get_int_expr (gfc_charlen_int_kind
,
16365 ref
->u
.ss
.start
= start
;
16366 if (end
== NULL
&& e
->ts
.u
.cl
)
16367 end
= gfc_copy_expr (e
->ts
.u
.cl
->length
);
16368 ref
->u
.ss
.end
= end
;
16369 ref
->u
.ss
.length
= e
->ts
.u
.cl
;
16376 /* Any further ref is an error. */
16379 gcc_assert (ref
->type
== REF_ARRAY
);
16380 gfc_error ("Syntax error in EQUIVALENCE statement at %L",
16386 if (!gfc_resolve_expr (e
))
16389 sym
= e
->symtree
->n
.sym
;
16391 if (sym
->attr
.is_protected
)
16393 if (cnt_protected
> 0 && cnt_protected
!= object
)
16395 gfc_error ("Either all or none of the objects in the "
16396 "EQUIVALENCE set at %L shall have the "
16397 "PROTECTED attribute",
16402 /* Shall not equivalence common block variables in a PURE procedure. */
16403 if (sym
->ns
->proc_name
16404 && sym
->ns
->proc_name
->attr
.pure
16405 && sym
->attr
.in_common
)
16407 /* Need to check for symbols that may have entered the pure
16408 procedure via a USE statement. */
16409 bool saw_sym
= false;
16410 if (sym
->ns
->use_stmts
)
16413 for (r
= sym
->ns
->use_stmts
->rename
; r
; r
= r
->next
)
16414 if (strcmp(r
->use_name
, sym
->name
) == 0) saw_sym
= true;
16420 gfc_error ("COMMON block member %qs at %L cannot be an "
16421 "EQUIVALENCE object in the pure procedure %qs",
16422 sym
->name
, &e
->where
, sym
->ns
->proc_name
->name
);
16426 /* Shall not be a named constant. */
16427 if (e
->expr_type
== EXPR_CONSTANT
)
16429 gfc_error ("Named constant %qs at %L cannot be an EQUIVALENCE "
16430 "object", sym
->name
, &e
->where
);
16434 if (e
->ts
.type
== BT_DERIVED
16435 && !resolve_equivalence_derived (e
->ts
.u
.derived
, sym
, e
))
16438 /* Check that the types correspond correctly:
16440 A numeric sequence structure may be equivalenced to another sequence
16441 structure, an object of default integer type, default real type, double
16442 precision real type, default logical type such that components of the
16443 structure ultimately only become associated to objects of the same
16444 kind. A character sequence structure may be equivalenced to an object
16445 of default character kind or another character sequence structure.
16446 Other objects may be equivalenced only to objects of the same type and
16447 kind parameters. */
16449 /* Identical types are unconditionally OK. */
16450 if (object
== 1 || gfc_compare_types (last_ts
, &sym
->ts
))
16451 goto identical_types
;
16453 last_eq_type
= sequence_type (*last_ts
);
16454 eq_type
= sequence_type (sym
->ts
);
16456 /* Since the pair of objects is not of the same type, mixed or
16457 non-default sequences can be rejected. */
16459 msg
= "Sequence %s with mixed components in EQUIVALENCE "
16460 "statement at %L with different type objects";
16462 && last_eq_type
== SEQ_MIXED
16463 && !gfc_notify_std (GFC_STD_GNU
, msg
, first_sym
->name
, last_where
))
16464 || (eq_type
== SEQ_MIXED
16465 && !gfc_notify_std (GFC_STD_GNU
, msg
, sym
->name
, &e
->where
)))
16468 msg
= "Non-default type object or sequence %s in EQUIVALENCE "
16469 "statement at %L with objects of different type";
16471 && last_eq_type
== SEQ_NONDEFAULT
16472 && !gfc_notify_std (GFC_STD_GNU
, msg
, first_sym
->name
, last_where
))
16473 || (eq_type
== SEQ_NONDEFAULT
16474 && !gfc_notify_std (GFC_STD_GNU
, msg
, sym
->name
, &e
->where
)))
16477 msg
="Non-CHARACTER object %qs in default CHARACTER "
16478 "EQUIVALENCE statement at %L";
16479 if (last_eq_type
== SEQ_CHARACTER
16480 && eq_type
!= SEQ_CHARACTER
16481 && !gfc_notify_std (GFC_STD_GNU
, msg
, sym
->name
, &e
->where
))
16484 msg
="Non-NUMERIC object %qs in default NUMERIC "
16485 "EQUIVALENCE statement at %L";
16486 if (last_eq_type
== SEQ_NUMERIC
16487 && eq_type
!= SEQ_NUMERIC
16488 && !gfc_notify_std (GFC_STD_GNU
, msg
, sym
->name
, &e
->where
))
16493 last_where
= &e
->where
;
16498 /* Shall not be an automatic array. */
16499 if (e
->ref
->type
== REF_ARRAY
16500 && !gfc_resolve_array_spec (e
->ref
->u
.ar
.as
, 1))
16502 gfc_error ("Array %qs at %L with non-constant bounds cannot be "
16503 "an EQUIVALENCE object", sym
->name
, &e
->where
);
16510 /* Shall not be a structure component. */
16511 if (r
->type
== REF_COMPONENT
)
16513 gfc_error ("Structure component %qs at %L cannot be an "
16514 "EQUIVALENCE object",
16515 r
->u
.c
.component
->name
, &e
->where
);
16519 /* A substring shall not have length zero. */
16520 if (r
->type
== REF_SUBSTRING
)
16522 if (compare_bound (r
->u
.ss
.start
, r
->u
.ss
.end
) == CMP_GT
)
16524 gfc_error ("Substring at %L has length zero",
16525 &r
->u
.ss
.start
->where
);
16535 /* Function called by resolve_fntype to flag other symbol used in the
16536 length type parameter specification of function resuls. */
16539 flag_fn_result_spec (gfc_expr
*expr
,
16541 int *f ATTRIBUTE_UNUSED
)
16546 if (expr
->expr_type
== EXPR_VARIABLE
)
16548 s
= expr
->symtree
->n
.sym
;
16549 for (ns
= s
->ns
; ns
; ns
= ns
->parent
)
16555 gfc_error ("Self reference in character length expression "
16556 "for %qs at %L", sym
->name
, &expr
->where
);
16560 if (!s
->fn_result_spec
16561 && s
->attr
.flavor
== FL_PARAMETER
)
16563 /* Function contained in a module.... */
16564 if (ns
->proc_name
&& ns
->proc_name
->attr
.flavor
== FL_MODULE
)
16567 s
->fn_result_spec
= 1;
16568 /* Make sure that this symbol is translated as a module
16570 st
= gfc_get_unique_symtree (ns
);
16574 /* ... which is use associated and called. */
16575 else if (s
->attr
.use_assoc
|| s
->attr
.used_in_submodule
16577 /* External function matched with an interface. */
16580 && s
->ns
->proc_name
->attr
.if_source
== IFSRC_DECL
)
16581 || s
->ns
->proc_name
->attr
.if_source
== IFSRC_IFBODY
)
16582 && s
->ns
->proc_name
->attr
.function
))
16583 s
->fn_result_spec
= 1;
16590 /* Resolve function and ENTRY types, issue diagnostics if needed. */
16593 resolve_fntype (gfc_namespace
*ns
)
16595 gfc_entry_list
*el
;
16598 if (ns
->proc_name
== NULL
|| !ns
->proc_name
->attr
.function
)
16601 /* If there are any entries, ns->proc_name is the entry master
16602 synthetic symbol and ns->entries->sym actual FUNCTION symbol. */
16604 sym
= ns
->entries
->sym
;
16606 sym
= ns
->proc_name
;
16607 if (sym
->result
== sym
16608 && sym
->ts
.type
== BT_UNKNOWN
16609 && !gfc_set_default_type (sym
, 0, NULL
)
16610 && !sym
->attr
.untyped
)
16612 gfc_error ("Function %qs at %L has no IMPLICIT type",
16613 sym
->name
, &sym
->declared_at
);
16614 sym
->attr
.untyped
= 1;
16617 if (sym
->ts
.type
== BT_DERIVED
&& !sym
->ts
.u
.derived
->attr
.use_assoc
16618 && !sym
->attr
.contained
16619 && !gfc_check_symbol_access (sym
->ts
.u
.derived
)
16620 && gfc_check_symbol_access (sym
))
16622 gfc_notify_std (GFC_STD_F2003
, "PUBLIC function %qs at "
16623 "%L of PRIVATE type %qs", sym
->name
,
16624 &sym
->declared_at
, sym
->ts
.u
.derived
->name
);
16628 for (el
= ns
->entries
->next
; el
; el
= el
->next
)
16630 if (el
->sym
->result
== el
->sym
16631 && el
->sym
->ts
.type
== BT_UNKNOWN
16632 && !gfc_set_default_type (el
->sym
, 0, NULL
)
16633 && !el
->sym
->attr
.untyped
)
16635 gfc_error ("ENTRY %qs at %L has no IMPLICIT type",
16636 el
->sym
->name
, &el
->sym
->declared_at
);
16637 el
->sym
->attr
.untyped
= 1;
16641 if (sym
->ts
.type
== BT_CHARACTER
)
16642 gfc_traverse_expr (sym
->ts
.u
.cl
->length
, sym
, flag_fn_result_spec
, 0);
16646 /* 12.3.2.1.1 Defined operators. */
16649 check_uop_procedure (gfc_symbol
*sym
, locus where
)
16651 gfc_formal_arglist
*formal
;
16653 if (!sym
->attr
.function
)
16655 gfc_error ("User operator procedure %qs at %L must be a FUNCTION",
16656 sym
->name
, &where
);
16660 if (sym
->ts
.type
== BT_CHARACTER
16661 && !((sym
->ts
.u
.cl
&& sym
->ts
.u
.cl
->length
) || sym
->ts
.deferred
)
16662 && !(sym
->result
&& ((sym
->result
->ts
.u
.cl
16663 && sym
->result
->ts
.u
.cl
->length
) || sym
->result
->ts
.deferred
)))
16665 gfc_error ("User operator procedure %qs at %L cannot be assumed "
16666 "character length", sym
->name
, &where
);
16670 formal
= gfc_sym_get_dummy_args (sym
);
16671 if (!formal
|| !formal
->sym
)
16673 gfc_error ("User operator procedure %qs at %L must have at least "
16674 "one argument", sym
->name
, &where
);
16678 if (formal
->sym
->attr
.intent
!= INTENT_IN
)
16680 gfc_error ("First argument of operator interface at %L must be "
16681 "INTENT(IN)", &where
);
16685 if (formal
->sym
->attr
.optional
)
16687 gfc_error ("First argument of operator interface at %L cannot be "
16688 "optional", &where
);
16692 formal
= formal
->next
;
16693 if (!formal
|| !formal
->sym
)
16696 if (formal
->sym
->attr
.intent
!= INTENT_IN
)
16698 gfc_error ("Second argument of operator interface at %L must be "
16699 "INTENT(IN)", &where
);
16703 if (formal
->sym
->attr
.optional
)
16705 gfc_error ("Second argument of operator interface at %L cannot be "
16706 "optional", &where
);
16712 gfc_error ("Operator interface at %L must have, at most, two "
16713 "arguments", &where
);
16721 gfc_resolve_uops (gfc_symtree
*symtree
)
16723 gfc_interface
*itr
;
16725 if (symtree
== NULL
)
16728 gfc_resolve_uops (symtree
->left
);
16729 gfc_resolve_uops (symtree
->right
);
16731 for (itr
= symtree
->n
.uop
->op
; itr
; itr
= itr
->next
)
16732 check_uop_procedure (itr
->sym
, itr
->sym
->declared_at
);
16736 /* Examine all of the expressions associated with a program unit,
16737 assign types to all intermediate expressions, make sure that all
16738 assignments are to compatible types and figure out which names
16739 refer to which functions or subroutines. It doesn't check code
16740 block, which is handled by gfc_resolve_code. */
16743 resolve_types (gfc_namespace
*ns
)
16749 gfc_namespace
* old_ns
= gfc_current_ns
;
16751 if (ns
->types_resolved
)
16754 /* Check that all IMPLICIT types are ok. */
16755 if (!ns
->seen_implicit_none
)
16758 for (letter
= 0; letter
!= GFC_LETTERS
; ++letter
)
16759 if (ns
->set_flag
[letter
]
16760 && !resolve_typespec_used (&ns
->default_type
[letter
],
16761 &ns
->implicit_loc
[letter
], NULL
))
16765 gfc_current_ns
= ns
;
16767 resolve_entries (ns
);
16769 resolve_common_vars (&ns
->blank_common
, false);
16770 resolve_common_blocks (ns
->common_root
);
16772 resolve_contained_functions (ns
);
16774 if (ns
->proc_name
&& ns
->proc_name
->attr
.flavor
== FL_PROCEDURE
16775 && ns
->proc_name
->attr
.if_source
== IFSRC_IFBODY
)
16776 resolve_formal_arglist (ns
->proc_name
);
16778 gfc_traverse_ns (ns
, resolve_bind_c_derived_types
);
16780 for (cl
= ns
->cl_list
; cl
; cl
= cl
->next
)
16781 resolve_charlen (cl
);
16783 gfc_traverse_ns (ns
, resolve_symbol
);
16785 resolve_fntype (ns
);
16787 for (n
= ns
->contained
; n
; n
= n
->sibling
)
16789 if (gfc_pure (ns
->proc_name
) && !gfc_pure (n
->proc_name
))
16790 gfc_error ("Contained procedure %qs at %L of a PURE procedure must "
16791 "also be PURE", n
->proc_name
->name
,
16792 &n
->proc_name
->declared_at
);
16798 gfc_do_concurrent_flag
= 0;
16799 gfc_check_interfaces (ns
);
16801 gfc_traverse_ns (ns
, resolve_values
);
16803 if (ns
->save_all
|| !flag_automatic
)
16807 for (d
= ns
->data
; d
; d
= d
->next
)
16811 gfc_traverse_ns (ns
, gfc_formalize_init_value
);
16813 gfc_traverse_ns (ns
, gfc_verify_binding_labels
);
16815 for (eq
= ns
->equiv
; eq
; eq
= eq
->next
)
16816 resolve_equivalence (eq
);
16818 /* Warn about unused labels. */
16819 if (warn_unused_label
)
16820 warn_unused_fortran_label (ns
->st_labels
);
16822 gfc_resolve_uops (ns
->uop_root
);
16824 gfc_traverse_ns (ns
, gfc_verify_DTIO_procedures
);
16826 gfc_resolve_omp_declare_simd (ns
);
16828 gfc_resolve_omp_udrs (ns
->omp_udr_root
);
16830 ns
->types_resolved
= 1;
16832 gfc_current_ns
= old_ns
;
16836 /* Call gfc_resolve_code recursively. */
16839 resolve_codes (gfc_namespace
*ns
)
16842 bitmap_obstack old_obstack
;
16844 if (ns
->resolved
== 1)
16847 for (n
= ns
->contained
; n
; n
= n
->sibling
)
16850 gfc_current_ns
= ns
;
16852 /* Don't clear 'cs_base' if this is the namespace of a BLOCK construct. */
16853 if (!(ns
->proc_name
&& ns
->proc_name
->attr
.flavor
== FL_LABEL
))
16856 /* Set to an out of range value. */
16857 current_entry_id
= -1;
16859 old_obstack
= labels_obstack
;
16860 bitmap_obstack_initialize (&labels_obstack
);
16862 gfc_resolve_oacc_declare (ns
);
16863 gfc_resolve_oacc_routines (ns
);
16864 gfc_resolve_omp_local_vars (ns
);
16865 gfc_resolve_code (ns
->code
, ns
);
16867 bitmap_obstack_release (&labels_obstack
);
16868 labels_obstack
= old_obstack
;
16872 /* This function is called after a complete program unit has been compiled.
16873 Its purpose is to examine all of the expressions associated with a program
16874 unit, assign types to all intermediate expressions, make sure that all
16875 assignments are to compatible types and figure out which names refer to
16876 which functions or subroutines. */
16879 gfc_resolve (gfc_namespace
*ns
)
16881 gfc_namespace
*old_ns
;
16882 code_stack
*old_cs_base
;
16883 struct gfc_omp_saved_state old_omp_state
;
16889 old_ns
= gfc_current_ns
;
16890 old_cs_base
= cs_base
;
16892 /* As gfc_resolve can be called during resolution of an OpenMP construct
16893 body, we should clear any state associated to it, so that say NS's
16894 DO loops are not interpreted as OpenMP loops. */
16895 if (!ns
->construct_entities
)
16896 gfc_omp_save_and_clear_state (&old_omp_state
);
16898 resolve_types (ns
);
16899 component_assignment_level
= 0;
16900 resolve_codes (ns
);
16902 gfc_current_ns
= old_ns
;
16903 cs_base
= old_cs_base
;
16906 gfc_run_passes (ns
);
16908 if (!ns
->construct_entities
)
16909 gfc_omp_restore_state (&old_omp_state
);