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
)
586 /* Try to find out of what the return type is. */
587 if (sym
->result
->ts
.type
== BT_UNKNOWN
&& sym
->result
->ts
.interface
== NULL
)
589 t
= gfc_set_default_type (sym
->result
, 0, ns
);
591 if (!t
&& !sym
->result
->attr
.untyped
)
593 if (sym
->result
== sym
)
594 gfc_error ("Contained function %qs at %L has no IMPLICIT type",
595 sym
->name
, &sym
->declared_at
);
596 else if (!sym
->result
->attr
.proc_pointer
)
597 gfc_error ("Result %qs of contained function %qs at %L has "
598 "no IMPLICIT type", sym
->result
->name
, sym
->name
,
599 &sym
->result
->declared_at
);
600 sym
->result
->attr
.untyped
= 1;
604 /* Fortran 2008 Draft Standard, page 535, C418, on type-param-value
605 type, lists the only ways a character length value of * can be used:
606 dummy arguments of procedures, named constants, function results and
607 in allocate statements if the allocate_object is an assumed length dummy
608 in external functions. Internal function results and results of module
609 procedures are not on this list, ergo, not permitted. */
611 if (sym
->result
->ts
.type
== BT_CHARACTER
)
613 gfc_charlen
*cl
= sym
->result
->ts
.u
.cl
;
614 if ((!cl
|| !cl
->length
) && !sym
->result
->ts
.deferred
)
616 /* See if this is a module-procedure and adapt error message
619 gcc_assert (ns
->parent
&& ns
->parent
->proc_name
);
620 module_proc
= (ns
->parent
->proc_name
->attr
.flavor
== FL_MODULE
);
622 gfc_error (module_proc
623 ? G_("Character-valued module procedure %qs at %L"
624 " must not be assumed length")
625 : G_("Character-valued internal function %qs at %L"
626 " must not be assumed length"),
627 sym
->name
, &sym
->declared_at
);
633 /* Add NEW_ARGS to the formal argument list of PROC, taking care not to
634 introduce duplicates. */
637 merge_argument_lists (gfc_symbol
*proc
, gfc_formal_arglist
*new_args
)
639 gfc_formal_arglist
*f
, *new_arglist
;
642 for (; new_args
!= NULL
; new_args
= new_args
->next
)
644 new_sym
= new_args
->sym
;
645 /* See if this arg is already in the formal argument list. */
646 for (f
= proc
->formal
; f
; f
= f
->next
)
648 if (new_sym
== f
->sym
)
655 /* Add a new argument. Argument order is not important. */
656 new_arglist
= gfc_get_formal_arglist ();
657 new_arglist
->sym
= new_sym
;
658 new_arglist
->next
= proc
->formal
;
659 proc
->formal
= new_arglist
;
664 /* Flag the arguments that are not present in all entries. */
667 check_argument_lists (gfc_symbol
*proc
, gfc_formal_arglist
*new_args
)
669 gfc_formal_arglist
*f
, *head
;
672 for (f
= proc
->formal
; f
; f
= f
->next
)
677 for (new_args
= head
; new_args
; new_args
= new_args
->next
)
679 if (new_args
->sym
== f
->sym
)
686 f
->sym
->attr
.not_always_present
= 1;
691 /* Resolve alternate entry points. If a symbol has multiple entry points we
692 create a new master symbol for the main routine, and turn the existing
693 symbol into an entry point. */
696 resolve_entries (gfc_namespace
*ns
)
698 gfc_namespace
*old_ns
;
702 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
703 static int master_count
= 0;
705 if (ns
->proc_name
== NULL
)
708 /* No need to do anything if this procedure doesn't have alternate entry
713 /* We may already have resolved alternate entry points. */
714 if (ns
->proc_name
->attr
.entry_master
)
717 /* If this isn't a procedure something has gone horribly wrong. */
718 gcc_assert (ns
->proc_name
->attr
.flavor
== FL_PROCEDURE
);
720 /* Remember the current namespace. */
721 old_ns
= gfc_current_ns
;
725 /* Add the main entry point to the list of entry points. */
726 el
= gfc_get_entry_list ();
727 el
->sym
= ns
->proc_name
;
729 el
->next
= ns
->entries
;
731 ns
->proc_name
->attr
.entry
= 1;
733 /* If it is a module function, it needs to be in the right namespace
734 so that gfc_get_fake_result_decl can gather up the results. The
735 need for this arose in get_proc_name, where these beasts were
736 left in their own namespace, to keep prior references linked to
737 the entry declaration.*/
738 if (ns
->proc_name
->attr
.function
739 && ns
->parent
&& ns
->parent
->proc_name
->attr
.flavor
== FL_MODULE
)
742 /* Do the same for entries where the master is not a module
743 procedure. These are retained in the module namespace because
744 of the module procedure declaration. */
745 for (el
= el
->next
; el
; el
= el
->next
)
746 if (el
->sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
747 && el
->sym
->attr
.mod_proc
)
751 /* Add an entry statement for it. */
752 c
= gfc_get_code (EXEC_ENTRY
);
757 /* Create a new symbol for the master function. */
758 /* Give the internal function a unique name (within this file).
759 Also include the function name so the user has some hope of figuring
760 out what is going on. */
761 snprintf (name
, GFC_MAX_SYMBOL_LEN
, "master.%d.%s",
762 master_count
++, ns
->proc_name
->name
);
763 gfc_get_ha_symbol (name
, &proc
);
764 gcc_assert (proc
!= NULL
);
766 gfc_add_procedure (&proc
->attr
, PROC_INTERNAL
, proc
->name
, NULL
);
767 if (ns
->proc_name
->attr
.subroutine
)
768 gfc_add_subroutine (&proc
->attr
, proc
->name
, NULL
);
772 gfc_typespec
*ts
, *fts
;
773 gfc_array_spec
*as
, *fas
;
774 gfc_add_function (&proc
->attr
, proc
->name
, NULL
);
776 fas
= ns
->entries
->sym
->as
;
777 fas
= fas
? fas
: ns
->entries
->sym
->result
->as
;
778 fts
= &ns
->entries
->sym
->result
->ts
;
779 if (fts
->type
== BT_UNKNOWN
)
780 fts
= gfc_get_default_type (ns
->entries
->sym
->result
->name
, NULL
);
781 for (el
= ns
->entries
->next
; el
; el
= el
->next
)
783 ts
= &el
->sym
->result
->ts
;
785 as
= as
? as
: el
->sym
->result
->as
;
786 if (ts
->type
== BT_UNKNOWN
)
787 ts
= gfc_get_default_type (el
->sym
->result
->name
, NULL
);
789 if (! gfc_compare_types (ts
, fts
)
790 || (el
->sym
->result
->attr
.dimension
791 != ns
->entries
->sym
->result
->attr
.dimension
)
792 || (el
->sym
->result
->attr
.pointer
793 != ns
->entries
->sym
->result
->attr
.pointer
))
795 else if (as
&& fas
&& ns
->entries
->sym
->result
!= el
->sym
->result
796 && gfc_compare_array_spec (as
, fas
) == 0)
797 gfc_error ("Function %s at %L has entries with mismatched "
798 "array specifications", ns
->entries
->sym
->name
,
799 &ns
->entries
->sym
->declared_at
);
800 /* The characteristics need to match and thus both need to have
801 the same string length, i.e. both len=*, or both len=4.
802 Having both len=<variable> is also possible, but difficult to
803 check at compile time. */
804 else if (ts
->type
== BT_CHARACTER
&& ts
->u
.cl
&& fts
->u
.cl
805 && (((ts
->u
.cl
->length
&& !fts
->u
.cl
->length
)
806 ||(!ts
->u
.cl
->length
&& fts
->u
.cl
->length
))
808 && ts
->u
.cl
->length
->expr_type
809 != fts
->u
.cl
->length
->expr_type
)
811 && ts
->u
.cl
->length
->expr_type
== EXPR_CONSTANT
812 && mpz_cmp (ts
->u
.cl
->length
->value
.integer
,
813 fts
->u
.cl
->length
->value
.integer
) != 0)))
814 gfc_notify_std (GFC_STD_GNU
, "Function %s at %L with "
815 "entries returning variables of different "
816 "string lengths", ns
->entries
->sym
->name
,
817 &ns
->entries
->sym
->declared_at
);
822 sym
= ns
->entries
->sym
->result
;
823 /* All result types the same. */
825 if (sym
->attr
.dimension
)
826 gfc_set_array_spec (proc
, gfc_copy_array_spec (sym
->as
), NULL
);
827 if (sym
->attr
.pointer
)
828 gfc_add_pointer (&proc
->attr
, NULL
);
832 /* Otherwise the result will be passed through a union by
834 proc
->attr
.mixed_entry_master
= 1;
835 for (el
= ns
->entries
; el
; el
= el
->next
)
837 sym
= el
->sym
->result
;
838 if (sym
->attr
.dimension
)
840 if (el
== ns
->entries
)
841 gfc_error ("FUNCTION result %s can't be an array in "
842 "FUNCTION %s at %L", sym
->name
,
843 ns
->entries
->sym
->name
, &sym
->declared_at
);
845 gfc_error ("ENTRY result %s can't be an array in "
846 "FUNCTION %s at %L", sym
->name
,
847 ns
->entries
->sym
->name
, &sym
->declared_at
);
849 else if (sym
->attr
.pointer
)
851 if (el
== ns
->entries
)
852 gfc_error ("FUNCTION result %s can't be a POINTER in "
853 "FUNCTION %s at %L", sym
->name
,
854 ns
->entries
->sym
->name
, &sym
->declared_at
);
856 gfc_error ("ENTRY result %s can't be a POINTER in "
857 "FUNCTION %s at %L", sym
->name
,
858 ns
->entries
->sym
->name
, &sym
->declared_at
);
863 if (ts
->type
== BT_UNKNOWN
)
864 ts
= gfc_get_default_type (sym
->name
, NULL
);
868 if (ts
->kind
== gfc_default_integer_kind
)
872 if (ts
->kind
== gfc_default_real_kind
873 || ts
->kind
== gfc_default_double_kind
)
877 if (ts
->kind
== gfc_default_complex_kind
)
881 if (ts
->kind
== gfc_default_logical_kind
)
885 /* We will issue error elsewhere. */
893 if (el
== ns
->entries
)
894 gfc_error ("FUNCTION result %s can't be of type %s "
895 "in FUNCTION %s at %L", sym
->name
,
896 gfc_typename (ts
), ns
->entries
->sym
->name
,
899 gfc_error ("ENTRY result %s can't be of type %s "
900 "in FUNCTION %s at %L", sym
->name
,
901 gfc_typename (ts
), ns
->entries
->sym
->name
,
908 proc
->attr
.access
= ACCESS_PRIVATE
;
909 proc
->attr
.entry_master
= 1;
911 /* Merge all the entry point arguments. */
912 for (el
= ns
->entries
; el
; el
= el
->next
)
913 merge_argument_lists (proc
, el
->sym
->formal
);
915 /* Check the master formal arguments for any that are not
916 present in all entry points. */
917 for (el
= ns
->entries
; el
; el
= el
->next
)
918 check_argument_lists (proc
, el
->sym
->formal
);
920 /* Use the master function for the function body. */
921 ns
->proc_name
= proc
;
923 /* Finalize the new symbols. */
924 gfc_commit_symbols ();
926 /* Restore the original namespace. */
927 gfc_current_ns
= old_ns
;
931 /* Resolve common variables. */
933 resolve_common_vars (gfc_common_head
*common_block
, bool named_common
)
935 gfc_symbol
*csym
= common_block
->head
;
937 for (; csym
; csym
= csym
->common_next
)
939 /* gfc_add_in_common may have been called before, but the reported errors
940 have been ignored to continue parsing.
941 We do the checks again here. */
942 if (!csym
->attr
.use_assoc
)
943 gfc_add_in_common (&csym
->attr
, csym
->name
, &common_block
->where
);
945 if (csym
->value
|| csym
->attr
.data
)
947 if (!csym
->ns
->is_block_data
)
948 gfc_notify_std (GFC_STD_GNU
, "Variable %qs at %L is in COMMON "
949 "but only in BLOCK DATA initialization is "
950 "allowed", csym
->name
, &csym
->declared_at
);
951 else if (!named_common
)
952 gfc_notify_std (GFC_STD_GNU
, "Initialized variable %qs at %L is "
953 "in a blank COMMON but initialization is only "
954 "allowed in named common blocks", csym
->name
,
958 if (UNLIMITED_POLY (csym
))
959 gfc_error_now ("%qs in cannot appear in COMMON at %L "
960 "[F2008:C5100]", csym
->name
, &csym
->declared_at
);
962 if (csym
->ts
.type
!= BT_DERIVED
)
965 if (!(csym
->ts
.u
.derived
->attr
.sequence
966 || csym
->ts
.u
.derived
->attr
.is_bind_c
))
967 gfc_error_now ("Derived type variable %qs in COMMON at %L "
968 "has neither the SEQUENCE nor the BIND(C) "
969 "attribute", csym
->name
, &csym
->declared_at
);
970 if (csym
->ts
.u
.derived
->attr
.alloc_comp
)
971 gfc_error_now ("Derived type variable %qs in COMMON at %L "
972 "has an ultimate component that is "
973 "allocatable", csym
->name
, &csym
->declared_at
);
974 if (gfc_has_default_initializer (csym
->ts
.u
.derived
))
975 gfc_error_now ("Derived type variable %qs in COMMON at %L "
976 "may not have default initializer", csym
->name
,
979 if (csym
->attr
.flavor
== FL_UNKNOWN
&& !csym
->attr
.proc_pointer
)
980 gfc_add_flavor (&csym
->attr
, FL_VARIABLE
, csym
->name
, &csym
->declared_at
);
984 /* Resolve common blocks. */
986 resolve_common_blocks (gfc_symtree
*common_root
)
991 if (common_root
== NULL
)
994 if (common_root
->left
)
995 resolve_common_blocks (common_root
->left
);
996 if (common_root
->right
)
997 resolve_common_blocks (common_root
->right
);
999 resolve_common_vars (common_root
->n
.common
, true);
1001 if (!gfc_notify_std (GFC_STD_F2018_OBS
, "COMMON block at %L",
1002 &common_root
->n
.common
->where
))
1005 /* The common name is a global name - in Fortran 2003 also if it has a
1006 C binding name, since Fortran 2008 only the C binding name is a global
1008 if (!common_root
->n
.common
->binding_label
1009 || gfc_notification_std (GFC_STD_F2008
))
1011 gsym
= gfc_find_gsymbol (gfc_gsym_root
,
1012 common_root
->n
.common
->name
);
1014 if (gsym
&& gfc_notification_std (GFC_STD_F2008
)
1015 && gsym
->type
== GSYM_COMMON
1016 && ((common_root
->n
.common
->binding_label
1017 && (!gsym
->binding_label
1018 || strcmp (common_root
->n
.common
->binding_label
,
1019 gsym
->binding_label
) != 0))
1020 || (!common_root
->n
.common
->binding_label
1021 && gsym
->binding_label
)))
1023 gfc_error ("In Fortran 2003 COMMON %qs block at %L is a global "
1024 "identifier and must thus have the same binding name "
1025 "as the same-named COMMON block at %L: %s vs %s",
1026 common_root
->n
.common
->name
, &common_root
->n
.common
->where
,
1028 common_root
->n
.common
->binding_label
1029 ? common_root
->n
.common
->binding_label
: "(blank)",
1030 gsym
->binding_label
? gsym
->binding_label
: "(blank)");
1034 if (gsym
&& gsym
->type
!= GSYM_COMMON
1035 && !common_root
->n
.common
->binding_label
)
1037 gfc_error ("COMMON block %qs at %L uses the same global identifier "
1039 common_root
->n
.common
->name
, &common_root
->n
.common
->where
,
1043 if (gsym
&& gsym
->type
!= GSYM_COMMON
)
1045 gfc_error ("Fortran 2008: COMMON block %qs with binding label at "
1046 "%L sharing the identifier with global non-COMMON-block "
1047 "entity at %L", common_root
->n
.common
->name
,
1048 &common_root
->n
.common
->where
, &gsym
->where
);
1053 gsym
= gfc_get_gsymbol (common_root
->n
.common
->name
);
1054 gsym
->type
= GSYM_COMMON
;
1055 gsym
->where
= common_root
->n
.common
->where
;
1061 if (common_root
->n
.common
->binding_label
)
1063 gsym
= gfc_find_gsymbol (gfc_gsym_root
,
1064 common_root
->n
.common
->binding_label
);
1065 if (gsym
&& gsym
->type
!= GSYM_COMMON
)
1067 gfc_error ("COMMON block at %L with binding label %qs uses the same "
1068 "global identifier as entity at %L",
1069 &common_root
->n
.common
->where
,
1070 common_root
->n
.common
->binding_label
, &gsym
->where
);
1075 gsym
= gfc_get_gsymbol (common_root
->n
.common
->binding_label
);
1076 gsym
->type
= GSYM_COMMON
;
1077 gsym
->where
= common_root
->n
.common
->where
;
1083 gfc_find_symbol (common_root
->name
, gfc_current_ns
, 0, &sym
);
1087 if (sym
->attr
.flavor
== FL_PARAMETER
)
1088 gfc_error ("COMMON block %qs at %L is used as PARAMETER at %L",
1089 sym
->name
, &common_root
->n
.common
->where
, &sym
->declared_at
);
1091 if (sym
->attr
.external
)
1092 gfc_error ("COMMON block %qs at %L cannot have the EXTERNAL attribute",
1093 sym
->name
, &common_root
->n
.common
->where
);
1095 if (sym
->attr
.intrinsic
)
1096 gfc_error ("COMMON block %qs at %L is also an intrinsic procedure",
1097 sym
->name
, &common_root
->n
.common
->where
);
1098 else if (sym
->attr
.result
1099 || gfc_is_function_return_value (sym
, gfc_current_ns
))
1100 gfc_notify_std (GFC_STD_F2003
, "COMMON block %qs at %L "
1101 "that is also a function result", sym
->name
,
1102 &common_root
->n
.common
->where
);
1103 else if (sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.proc
!= PROC_INTERNAL
1104 && sym
->attr
.proc
!= PROC_ST_FUNCTION
)
1105 gfc_notify_std (GFC_STD_F2003
, "COMMON block %qs at %L "
1106 "that is also a global procedure", sym
->name
,
1107 &common_root
->n
.common
->where
);
1111 /* Resolve contained function types. Because contained functions can call one
1112 another, they have to be worked out before any of the contained procedures
1115 The good news is that if a function doesn't already have a type, the only
1116 way it can get one is through an IMPLICIT type or a RESULT variable, because
1117 by definition contained functions are contained namespace they're contained
1118 in, not in a sibling or parent namespace. */
1121 resolve_contained_functions (gfc_namespace
*ns
)
1123 gfc_namespace
*child
;
1126 resolve_formal_arglists (ns
);
1128 for (child
= ns
->contained
; child
; child
= child
->sibling
)
1130 /* Resolve alternate entry points first. */
1131 resolve_entries (child
);
1133 /* Then check function return types. */
1134 resolve_contained_fntype (child
->proc_name
, child
);
1135 for (el
= child
->entries
; el
; el
= el
->next
)
1136 resolve_contained_fntype (el
->sym
, child
);
1142 /* A Parameterized Derived Type constructor must contain values for
1143 the PDT KIND parameters or they must have a default initializer.
1144 Go through the constructor picking out the KIND expressions,
1145 storing them in 'param_list' and then call gfc_get_pdt_instance
1146 to obtain the PDT instance. */
1148 static gfc_actual_arglist
*param_list
, *param_tail
, *param
;
1151 get_pdt_spec_expr (gfc_component
*c
, gfc_expr
*expr
)
1153 param
= gfc_get_actual_arglist ();
1155 param_list
= param_tail
= param
;
1158 param_tail
->next
= param
;
1159 param_tail
= param_tail
->next
;
1162 param_tail
->name
= c
->name
;
1164 param_tail
->expr
= gfc_copy_expr (expr
);
1165 else if (c
->initializer
)
1166 param_tail
->expr
= gfc_copy_expr (c
->initializer
);
1169 param_tail
->spec_type
= SPEC_ASSUMED
;
1170 if (c
->attr
.pdt_kind
)
1172 gfc_error ("The KIND parameter %qs in the PDT constructor "
1173 "at %C has no value", param
->name
);
1182 get_pdt_constructor (gfc_expr
*expr
, gfc_constructor
**constr
,
1183 gfc_symbol
*derived
)
1185 gfc_constructor
*cons
= NULL
;
1186 gfc_component
*comp
;
1189 if (expr
&& expr
->expr_type
== EXPR_STRUCTURE
)
1190 cons
= gfc_constructor_first (expr
->value
.constructor
);
1195 comp
= derived
->components
;
1197 for (; comp
&& cons
; comp
= comp
->next
, cons
= gfc_constructor_next (cons
))
1200 && cons
->expr
->expr_type
== EXPR_STRUCTURE
1201 && comp
->ts
.type
== BT_DERIVED
)
1203 t
= get_pdt_constructor (cons
->expr
, NULL
, comp
->ts
.u
.derived
);
1207 else if (comp
->ts
.type
== BT_DERIVED
)
1209 t
= get_pdt_constructor (NULL
, &cons
, comp
->ts
.u
.derived
);
1213 else if ((comp
->attr
.pdt_kind
|| comp
->attr
.pdt_len
)
1214 && derived
->attr
.pdt_template
)
1216 t
= get_pdt_spec_expr (comp
, cons
->expr
);
1225 static bool resolve_fl_derived0 (gfc_symbol
*sym
);
1226 static bool resolve_fl_struct (gfc_symbol
*sym
);
1229 /* Resolve all of the elements of a structure constructor and make sure that
1230 the types are correct. The 'init' flag indicates that the given
1231 constructor is an initializer. */
1234 resolve_structure_cons (gfc_expr
*expr
, int init
)
1236 gfc_constructor
*cons
;
1237 gfc_component
*comp
;
1243 if (expr
->ts
.type
== BT_DERIVED
|| expr
->ts
.type
== BT_UNION
)
1245 if (expr
->ts
.u
.derived
->attr
.flavor
== FL_DERIVED
)
1246 resolve_fl_derived0 (expr
->ts
.u
.derived
);
1248 resolve_fl_struct (expr
->ts
.u
.derived
);
1250 /* If this is a Parameterized Derived Type template, find the
1251 instance corresponding to the PDT kind parameters. */
1252 if (expr
->ts
.u
.derived
->attr
.pdt_template
)
1255 t
= get_pdt_constructor (expr
, NULL
, expr
->ts
.u
.derived
);
1258 gfc_get_pdt_instance (param_list
, &expr
->ts
.u
.derived
, NULL
);
1260 expr
->param_list
= gfc_copy_actual_arglist (param_list
);
1263 gfc_free_actual_arglist (param_list
);
1265 if (!expr
->ts
.u
.derived
->attr
.pdt_type
)
1270 cons
= gfc_constructor_first (expr
->value
.constructor
);
1272 /* A constructor may have references if it is the result of substituting a
1273 parameter variable. In this case we just pull out the component we
1276 comp
= expr
->ref
->u
.c
.sym
->components
;
1278 comp
= expr
->ts
.u
.derived
->components
;
1280 for (; comp
&& cons
; comp
= comp
->next
, cons
= gfc_constructor_next (cons
))
1287 /* Unions use an EXPR_NULL contrived expression to tell the translation
1288 phase to generate an initializer of the appropriate length.
1290 if (cons
->expr
->ts
.type
== BT_UNION
&& cons
->expr
->expr_type
== EXPR_NULL
)
1293 if (!gfc_resolve_expr (cons
->expr
))
1299 rank
= comp
->as
? comp
->as
->rank
: 0;
1300 if (comp
->ts
.type
== BT_CLASS
1301 && !comp
->ts
.u
.derived
->attr
.unlimited_polymorphic
1302 && CLASS_DATA (comp
)->as
)
1303 rank
= CLASS_DATA (comp
)->as
->rank
;
1305 if (cons
->expr
->expr_type
!= EXPR_NULL
&& rank
!= cons
->expr
->rank
1306 && (comp
->attr
.allocatable
|| cons
->expr
->rank
))
1308 gfc_error ("The rank of the element in the structure "
1309 "constructor at %L does not match that of the "
1310 "component (%d/%d)", &cons
->expr
->where
,
1311 cons
->expr
->rank
, rank
);
1315 /* If we don't have the right type, try to convert it. */
1317 if (!comp
->attr
.proc_pointer
&&
1318 !gfc_compare_types (&cons
->expr
->ts
, &comp
->ts
))
1320 if (strcmp (comp
->name
, "_extends") == 0)
1322 /* Can afford to be brutal with the _extends initializer.
1323 The derived type can get lost because it is PRIVATE
1324 but it is not usage constrained by the standard. */
1325 cons
->expr
->ts
= comp
->ts
;
1327 else if (comp
->attr
.pointer
&& cons
->expr
->ts
.type
!= BT_UNKNOWN
)
1329 gfc_error ("The element in the structure constructor at %L, "
1330 "for pointer component %qs, is %s but should be %s",
1331 &cons
->expr
->where
, comp
->name
,
1332 gfc_basic_typename (cons
->expr
->ts
.type
),
1333 gfc_basic_typename (comp
->ts
.type
));
1338 bool t2
= gfc_convert_type (cons
->expr
, &comp
->ts
, 1);
1344 /* For strings, the length of the constructor should be the same as
1345 the one of the structure, ensure this if the lengths are known at
1346 compile time and when we are dealing with PARAMETER or structure
1348 if (cons
->expr
->ts
.type
== BT_CHARACTER
&& comp
->ts
.u
.cl
1349 && comp
->ts
.u
.cl
->length
1350 && comp
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
1351 && cons
->expr
->ts
.u
.cl
&& cons
->expr
->ts
.u
.cl
->length
1352 && cons
->expr
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
1353 && cons
->expr
->rank
!= 0
1354 && mpz_cmp (cons
->expr
->ts
.u
.cl
->length
->value
.integer
,
1355 comp
->ts
.u
.cl
->length
->value
.integer
) != 0)
1357 if (cons
->expr
->expr_type
== EXPR_VARIABLE
1358 && cons
->expr
->symtree
->n
.sym
->attr
.flavor
== FL_PARAMETER
)
1360 /* Wrap the parameter in an array constructor (EXPR_ARRAY)
1361 to make use of the gfc_resolve_character_array_constructor
1362 machinery. The expression is later simplified away to
1363 an array of string literals. */
1364 gfc_expr
*para
= cons
->expr
;
1365 cons
->expr
= gfc_get_expr ();
1366 cons
->expr
->ts
= para
->ts
;
1367 cons
->expr
->where
= para
->where
;
1368 cons
->expr
->expr_type
= EXPR_ARRAY
;
1369 cons
->expr
->rank
= para
->rank
;
1370 cons
->expr
->shape
= gfc_copy_shape (para
->shape
, para
->rank
);
1371 gfc_constructor_append_expr (&cons
->expr
->value
.constructor
,
1372 para
, &cons
->expr
->where
);
1375 if (cons
->expr
->expr_type
== EXPR_ARRAY
)
1377 /* Rely on the cleanup of the namespace to deal correctly with
1378 the old charlen. (There was a block here that attempted to
1379 remove the charlen but broke the chain in so doing.) */
1380 cons
->expr
->ts
.u
.cl
= gfc_new_charlen (gfc_current_ns
, NULL
);
1381 cons
->expr
->ts
.u
.cl
->length_from_typespec
= true;
1382 cons
->expr
->ts
.u
.cl
->length
= gfc_copy_expr (comp
->ts
.u
.cl
->length
);
1383 gfc_resolve_character_array_constructor (cons
->expr
);
1387 if (cons
->expr
->expr_type
== EXPR_NULL
1388 && !(comp
->attr
.pointer
|| comp
->attr
.allocatable
1389 || comp
->attr
.proc_pointer
|| comp
->ts
.f90_type
== BT_VOID
1390 || (comp
->ts
.type
== BT_CLASS
1391 && (CLASS_DATA (comp
)->attr
.class_pointer
1392 || CLASS_DATA (comp
)->attr
.allocatable
))))
1395 gfc_error ("The NULL in the structure constructor at %L is "
1396 "being applied to component %qs, which is neither "
1397 "a POINTER nor ALLOCATABLE", &cons
->expr
->where
,
1401 if (comp
->attr
.proc_pointer
&& comp
->ts
.interface
)
1403 /* Check procedure pointer interface. */
1404 gfc_symbol
*s2
= NULL
;
1409 c2
= gfc_get_proc_ptr_comp (cons
->expr
);
1412 s2
= c2
->ts
.interface
;
1415 else if (cons
->expr
->expr_type
== EXPR_FUNCTION
)
1417 s2
= cons
->expr
->symtree
->n
.sym
->result
;
1418 name
= cons
->expr
->symtree
->n
.sym
->result
->name
;
1420 else if (cons
->expr
->expr_type
!= EXPR_NULL
)
1422 s2
= cons
->expr
->symtree
->n
.sym
;
1423 name
= cons
->expr
->symtree
->n
.sym
->name
;
1426 if (s2
&& !gfc_compare_interfaces (comp
->ts
.interface
, s2
, name
, 0, 1,
1427 err
, sizeof (err
), NULL
, NULL
))
1429 gfc_error_opt (OPT_Wargument_mismatch
,
1430 "Interface mismatch for procedure-pointer "
1431 "component %qs in structure constructor at %L:"
1432 " %s", comp
->name
, &cons
->expr
->where
, err
);
1437 if (!comp
->attr
.pointer
|| comp
->attr
.proc_pointer
1438 || cons
->expr
->expr_type
== EXPR_NULL
)
1441 a
= gfc_expr_attr (cons
->expr
);
1443 if (!a
.pointer
&& !a
.target
)
1446 gfc_error ("The element in the structure constructor at %L, "
1447 "for pointer component %qs should be a POINTER or "
1448 "a TARGET", &cons
->expr
->where
, comp
->name
);
1453 /* F08:C461. Additional checks for pointer initialization. */
1457 gfc_error ("Pointer initialization target at %L "
1458 "must not be ALLOCATABLE", &cons
->expr
->where
);
1463 gfc_error ("Pointer initialization target at %L "
1464 "must have the SAVE attribute", &cons
->expr
->where
);
1468 /* F2003, C1272 (3). */
1469 bool impure
= cons
->expr
->expr_type
== EXPR_VARIABLE
1470 && (gfc_impure_variable (cons
->expr
->symtree
->n
.sym
)
1471 || gfc_is_coindexed (cons
->expr
));
1472 if (impure
&& gfc_pure (NULL
))
1475 gfc_error ("Invalid expression in the structure constructor for "
1476 "pointer component %qs at %L in PURE procedure",
1477 comp
->name
, &cons
->expr
->where
);
1481 gfc_unset_implicit_pure (NULL
);
1488 /****************** Expression name resolution ******************/
1490 /* Returns 0 if a symbol was not declared with a type or
1491 attribute declaration statement, nonzero otherwise. */
1494 was_declared (gfc_symbol
*sym
)
1500 if (!a
.implicit_type
&& sym
->ts
.type
!= BT_UNKNOWN
)
1503 if (a
.allocatable
|| a
.dimension
|| a
.dummy
|| a
.external
|| a
.intrinsic
1504 || a
.optional
|| a
.pointer
|| a
.save
|| a
.target
|| a
.volatile_
1505 || a
.value
|| a
.access
!= ACCESS_UNKNOWN
|| a
.intent
!= INTENT_UNKNOWN
1506 || a
.asynchronous
|| a
.codimension
)
1513 /* Determine if a symbol is generic or not. */
1516 generic_sym (gfc_symbol
*sym
)
1520 if (sym
->attr
.generic
||
1521 (sym
->attr
.intrinsic
&& gfc_generic_intrinsic (sym
->name
)))
1524 if (was_declared (sym
) || sym
->ns
->parent
== NULL
)
1527 gfc_find_symbol (sym
->name
, sym
->ns
->parent
, 1, &s
);
1534 return generic_sym (s
);
1541 /* Determine if a symbol is specific or not. */
1544 specific_sym (gfc_symbol
*sym
)
1548 if (sym
->attr
.if_source
== IFSRC_IFBODY
1549 || sym
->attr
.proc
== PROC_MODULE
1550 || sym
->attr
.proc
== PROC_INTERNAL
1551 || sym
->attr
.proc
== PROC_ST_FUNCTION
1552 || (sym
->attr
.intrinsic
&& gfc_specific_intrinsic (sym
->name
))
1553 || sym
->attr
.external
)
1556 if (was_declared (sym
) || sym
->ns
->parent
== NULL
)
1559 gfc_find_symbol (sym
->name
, sym
->ns
->parent
, 1, &s
);
1561 return (s
== NULL
) ? 0 : specific_sym (s
);
1565 /* Figure out if the procedure is specific, generic or unknown. */
1568 { PTYPE_GENERIC
= 1, PTYPE_SPECIFIC
, PTYPE_UNKNOWN
};
1571 procedure_kind (gfc_symbol
*sym
)
1573 if (generic_sym (sym
))
1574 return PTYPE_GENERIC
;
1576 if (specific_sym (sym
))
1577 return PTYPE_SPECIFIC
;
1579 return PTYPE_UNKNOWN
;
1582 /* Check references to assumed size arrays. The flag need_full_assumed_size
1583 is nonzero when matching actual arguments. */
1585 static int need_full_assumed_size
= 0;
1588 check_assumed_size_reference (gfc_symbol
*sym
, gfc_expr
*e
)
1590 if (need_full_assumed_size
|| !(sym
->as
&& sym
->as
->type
== AS_ASSUMED_SIZE
))
1593 /* FIXME: The comparison "e->ref->u.ar.type == AR_FULL" is wrong.
1594 What should it be? */
1595 if (e
->ref
&& (e
->ref
->u
.ar
.end
[e
->ref
->u
.ar
.as
->rank
- 1] == NULL
)
1596 && (e
->ref
->u
.ar
.as
->type
== AS_ASSUMED_SIZE
)
1597 && (e
->ref
->u
.ar
.type
== AR_FULL
))
1599 gfc_error ("The upper bound in the last dimension must "
1600 "appear in the reference to the assumed size "
1601 "array %qs at %L", sym
->name
, &e
->where
);
1608 /* Look for bad assumed size array references in argument expressions
1609 of elemental and array valued intrinsic procedures. Since this is
1610 called from procedure resolution functions, it only recurses at
1614 resolve_assumed_size_actual (gfc_expr
*e
)
1619 switch (e
->expr_type
)
1622 if (e
->symtree
&& check_assumed_size_reference (e
->symtree
->n
.sym
, e
))
1627 if (resolve_assumed_size_actual (e
->value
.op
.op1
)
1628 || resolve_assumed_size_actual (e
->value
.op
.op2
))
1639 /* Check a generic procedure, passed as an actual argument, to see if
1640 there is a matching specific name. If none, it is an error, and if
1641 more than one, the reference is ambiguous. */
1643 count_specific_procs (gfc_expr
*e
)
1650 sym
= e
->symtree
->n
.sym
;
1652 for (p
= sym
->generic
; p
; p
= p
->next
)
1653 if (strcmp (sym
->name
, p
->sym
->name
) == 0)
1655 e
->symtree
= gfc_find_symtree (p
->sym
->ns
->sym_root
,
1661 gfc_error ("%qs at %L is ambiguous", e
->symtree
->n
.sym
->name
,
1665 gfc_error ("GENERIC procedure %qs is not allowed as an actual "
1666 "argument at %L", sym
->name
, &e
->where
);
1672 /* See if a call to sym could possibly be a not allowed RECURSION because of
1673 a missing RECURSIVE declaration. This means that either sym is the current
1674 context itself, or sym is the parent of a contained procedure calling its
1675 non-RECURSIVE containing procedure.
1676 This also works if sym is an ENTRY. */
1679 is_illegal_recursion (gfc_symbol
* sym
, gfc_namespace
* context
)
1681 gfc_symbol
* proc_sym
;
1682 gfc_symbol
* context_proc
;
1683 gfc_namespace
* real_context
;
1685 if (sym
->attr
.flavor
== FL_PROGRAM
1686 || gfc_fl_struct (sym
->attr
.flavor
))
1689 /* If we've got an ENTRY, find real procedure. */
1690 if (sym
->attr
.entry
&& sym
->ns
->entries
)
1691 proc_sym
= sym
->ns
->entries
->sym
;
1695 /* If sym is RECURSIVE, all is well of course. */
1696 if (proc_sym
->attr
.recursive
|| flag_recursive
)
1699 /* Find the context procedure's "real" symbol if it has entries.
1700 We look for a procedure symbol, so recurse on the parents if we don't
1701 find one (like in case of a BLOCK construct). */
1702 for (real_context
= context
; ; real_context
= real_context
->parent
)
1704 /* We should find something, eventually! */
1705 gcc_assert (real_context
);
1707 context_proc
= (real_context
->entries
? real_context
->entries
->sym
1708 : real_context
->proc_name
);
1710 /* In some special cases, there may not be a proc_name, like for this
1712 real(bad_kind()) function foo () ...
1713 when checking the call to bad_kind ().
1714 In these cases, we simply return here and assume that the
1719 if (context_proc
->attr
.flavor
!= FL_LABEL
)
1723 /* A call from sym's body to itself is recursion, of course. */
1724 if (context_proc
== proc_sym
)
1727 /* The same is true if context is a contained procedure and sym the
1729 if (context_proc
->attr
.contained
)
1731 gfc_symbol
* parent_proc
;
1733 gcc_assert (context
->parent
);
1734 parent_proc
= (context
->parent
->entries
? context
->parent
->entries
->sym
1735 : context
->parent
->proc_name
);
1737 if (parent_proc
== proc_sym
)
1745 /* Resolve an intrinsic procedure: Set its function/subroutine attribute,
1746 its typespec and formal argument list. */
1749 gfc_resolve_intrinsic (gfc_symbol
*sym
, locus
*loc
)
1751 gfc_intrinsic_sym
* isym
= NULL
;
1757 /* Already resolved. */
1758 if (sym
->from_intmod
&& sym
->ts
.type
!= BT_UNKNOWN
)
1761 /* We already know this one is an intrinsic, so we don't call
1762 gfc_is_intrinsic for full checking but rather use gfc_find_function and
1763 gfc_find_subroutine directly to check whether it is a function or
1766 if (sym
->intmod_sym_id
&& sym
->attr
.subroutine
)
1768 gfc_isym_id id
= gfc_isym_id_by_intmod_sym (sym
);
1769 isym
= gfc_intrinsic_subroutine_by_id (id
);
1771 else if (sym
->intmod_sym_id
)
1773 gfc_isym_id id
= gfc_isym_id_by_intmod_sym (sym
);
1774 isym
= gfc_intrinsic_function_by_id (id
);
1776 else if (!sym
->attr
.subroutine
)
1777 isym
= gfc_find_function (sym
->name
);
1779 if (isym
&& !sym
->attr
.subroutine
)
1781 if (sym
->ts
.type
!= BT_UNKNOWN
&& warn_surprising
1782 && !sym
->attr
.implicit_type
)
1783 gfc_warning (OPT_Wsurprising
,
1784 "Type specified for intrinsic function %qs at %L is"
1785 " ignored", sym
->name
, &sym
->declared_at
);
1787 if (!sym
->attr
.function
&&
1788 !gfc_add_function(&sym
->attr
, sym
->name
, loc
))
1793 else if (isym
|| (isym
= gfc_find_subroutine (sym
->name
)))
1795 if (sym
->ts
.type
!= BT_UNKNOWN
&& !sym
->attr
.implicit_type
)
1797 gfc_error ("Intrinsic subroutine %qs at %L shall not have a type"
1798 " specifier", sym
->name
, &sym
->declared_at
);
1802 if (!sym
->attr
.subroutine
&&
1803 !gfc_add_subroutine(&sym
->attr
, sym
->name
, loc
))
1808 gfc_error ("%qs declared INTRINSIC at %L does not exist", sym
->name
,
1813 gfc_copy_formal_args_intr (sym
, isym
, NULL
);
1815 sym
->attr
.pure
= isym
->pure
;
1816 sym
->attr
.elemental
= isym
->elemental
;
1818 /* Check it is actually available in the standard settings. */
1819 if (!gfc_check_intrinsic_standard (isym
, &symstd
, false, sym
->declared_at
))
1821 gfc_error ("The intrinsic %qs declared INTRINSIC at %L is not "
1822 "available in the current standard settings but %s. Use "
1823 "an appropriate %<-std=*%> option or enable "
1824 "%<-fall-intrinsics%> in order to use it.",
1825 sym
->name
, &sym
->declared_at
, symstd
);
1833 /* Resolve a procedure expression, like passing it to a called procedure or as
1834 RHS for a procedure pointer assignment. */
1837 resolve_procedure_expression (gfc_expr
* expr
)
1841 if (expr
->expr_type
!= EXPR_VARIABLE
)
1843 gcc_assert (expr
->symtree
);
1845 sym
= expr
->symtree
->n
.sym
;
1847 if (sym
->attr
.intrinsic
)
1848 gfc_resolve_intrinsic (sym
, &expr
->where
);
1850 if (sym
->attr
.flavor
!= FL_PROCEDURE
1851 || (sym
->attr
.function
&& sym
->result
== sym
))
1854 /* A non-RECURSIVE procedure that is used as procedure expression within its
1855 own body is in danger of being called recursively. */
1856 if (is_illegal_recursion (sym
, gfc_current_ns
))
1857 gfc_warning (0, "Non-RECURSIVE procedure %qs at %L is possibly calling"
1858 " itself recursively. Declare it RECURSIVE or use"
1859 " %<-frecursive%>", sym
->name
, &expr
->where
);
1865 /* Resolve an actual argument list. Most of the time, this is just
1866 resolving the expressions in the list.
1867 The exception is that we sometimes have to decide whether arguments
1868 that look like procedure arguments are really simple variable
1872 resolve_actual_arglist (gfc_actual_arglist
*arg
, procedure_type ptype
,
1873 bool no_formal_args
)
1876 gfc_symtree
*parent_st
;
1878 gfc_component
*comp
;
1879 int save_need_full_assumed_size
;
1880 bool return_value
= false;
1881 bool actual_arg_sav
= actual_arg
, first_actual_arg_sav
= first_actual_arg
;
1884 first_actual_arg
= true;
1886 for (; arg
; arg
= arg
->next
)
1891 /* Check the label is a valid branching target. */
1894 if (arg
->label
->defined
== ST_LABEL_UNKNOWN
)
1896 gfc_error ("Label %d referenced at %L is never defined",
1897 arg
->label
->value
, &arg
->label
->where
);
1901 first_actual_arg
= false;
1905 if (e
->expr_type
== EXPR_VARIABLE
1906 && e
->symtree
->n
.sym
->attr
.generic
1908 && count_specific_procs (e
) != 1)
1911 if (e
->ts
.type
!= BT_PROCEDURE
)
1913 save_need_full_assumed_size
= need_full_assumed_size
;
1914 if (e
->expr_type
!= EXPR_VARIABLE
)
1915 need_full_assumed_size
= 0;
1916 if (!gfc_resolve_expr (e
))
1918 need_full_assumed_size
= save_need_full_assumed_size
;
1922 /* See if the expression node should really be a variable reference. */
1924 sym
= e
->symtree
->n
.sym
;
1926 if (sym
->attr
.flavor
== FL_PROCEDURE
1927 || sym
->attr
.intrinsic
1928 || sym
->attr
.external
)
1932 /* If a procedure is not already determined to be something else
1933 check if it is intrinsic. */
1934 if (gfc_is_intrinsic (sym
, sym
->attr
.subroutine
, e
->where
))
1935 sym
->attr
.intrinsic
= 1;
1937 if (sym
->attr
.proc
== PROC_ST_FUNCTION
)
1939 gfc_error ("Statement function %qs at %L is not allowed as an "
1940 "actual argument", sym
->name
, &e
->where
);
1943 actual_ok
= gfc_intrinsic_actual_ok (sym
->name
,
1944 sym
->attr
.subroutine
);
1945 if (sym
->attr
.intrinsic
&& actual_ok
== 0)
1947 gfc_error ("Intrinsic %qs at %L is not allowed as an "
1948 "actual argument", sym
->name
, &e
->where
);
1951 if (sym
->attr
.contained
&& !sym
->attr
.use_assoc
1952 && sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
)
1954 if (!gfc_notify_std (GFC_STD_F2008
, "Internal procedure %qs is"
1955 " used as actual argument at %L",
1956 sym
->name
, &e
->where
))
1960 if (sym
->attr
.elemental
&& !sym
->attr
.intrinsic
)
1962 gfc_error ("ELEMENTAL non-INTRINSIC procedure %qs is not "
1963 "allowed as an actual argument at %L", sym
->name
,
1967 /* Check if a generic interface has a specific procedure
1968 with the same name before emitting an error. */
1969 if (sym
->attr
.generic
&& count_specific_procs (e
) != 1)
1972 /* Just in case a specific was found for the expression. */
1973 sym
= e
->symtree
->n
.sym
;
1975 /* If the symbol is the function that names the current (or
1976 parent) scope, then we really have a variable reference. */
1978 if (gfc_is_function_return_value (sym
, sym
->ns
))
1981 /* If all else fails, see if we have a specific intrinsic. */
1982 if (sym
->ts
.type
== BT_UNKNOWN
&& sym
->attr
.intrinsic
)
1984 gfc_intrinsic_sym
*isym
;
1986 isym
= gfc_find_function (sym
->name
);
1987 if (isym
== NULL
|| !isym
->specific
)
1989 gfc_error ("Unable to find a specific INTRINSIC procedure "
1990 "for the reference %qs at %L", sym
->name
,
1995 sym
->attr
.intrinsic
= 1;
1996 sym
->attr
.function
= 1;
1999 if (!gfc_resolve_expr (e
))
2004 /* See if the name is a module procedure in a parent unit. */
2006 if (was_declared (sym
) || sym
->ns
->parent
== NULL
)
2009 if (gfc_find_sym_tree (sym
->name
, sym
->ns
->parent
, 1, &parent_st
))
2011 gfc_error ("Symbol %qs at %L is ambiguous", sym
->name
, &e
->where
);
2015 if (parent_st
== NULL
)
2018 sym
= parent_st
->n
.sym
;
2019 e
->symtree
= parent_st
; /* Point to the right thing. */
2021 if (sym
->attr
.flavor
== FL_PROCEDURE
2022 || sym
->attr
.intrinsic
2023 || sym
->attr
.external
)
2025 if (!gfc_resolve_expr (e
))
2031 e
->expr_type
= EXPR_VARIABLE
;
2033 if ((sym
->as
!= NULL
&& sym
->ts
.type
!= BT_CLASS
)
2034 || (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
2035 && CLASS_DATA (sym
)->as
))
2037 e
->rank
= sym
->ts
.type
== BT_CLASS
2038 ? CLASS_DATA (sym
)->as
->rank
: sym
->as
->rank
;
2039 e
->ref
= gfc_get_ref ();
2040 e
->ref
->type
= REF_ARRAY
;
2041 e
->ref
->u
.ar
.type
= AR_FULL
;
2042 e
->ref
->u
.ar
.as
= sym
->ts
.type
== BT_CLASS
2043 ? CLASS_DATA (sym
)->as
: sym
->as
;
2046 /* Expressions are assigned a default ts.type of BT_PROCEDURE in
2047 primary.c (match_actual_arg). If above code determines that it
2048 is a variable instead, it needs to be resolved as it was not
2049 done at the beginning of this function. */
2050 save_need_full_assumed_size
= need_full_assumed_size
;
2051 if (e
->expr_type
!= EXPR_VARIABLE
)
2052 need_full_assumed_size
= 0;
2053 if (!gfc_resolve_expr (e
))
2055 need_full_assumed_size
= save_need_full_assumed_size
;
2058 /* Check argument list functions %VAL, %LOC and %REF. There is
2059 nothing to do for %REF. */
2060 if (arg
->name
&& arg
->name
[0] == '%')
2062 if (strcmp ("%VAL", arg
->name
) == 0)
2064 if (e
->ts
.type
== BT_CHARACTER
|| e
->ts
.type
== BT_DERIVED
)
2066 gfc_error ("By-value argument at %L is not of numeric "
2073 gfc_error ("By-value argument at %L cannot be an array or "
2074 "an array section", &e
->where
);
2078 /* Intrinsics are still PROC_UNKNOWN here. However,
2079 since same file external procedures are not resolvable
2080 in gfortran, it is a good deal easier to leave them to
2082 if (ptype
!= PROC_UNKNOWN
2083 && ptype
!= PROC_DUMMY
2084 && ptype
!= PROC_EXTERNAL
2085 && ptype
!= PROC_MODULE
)
2087 gfc_error ("By-value argument at %L is not allowed "
2088 "in this context", &e
->where
);
2093 /* Statement functions have already been excluded above. */
2094 else if (strcmp ("%LOC", arg
->name
) == 0
2095 && e
->ts
.type
== BT_PROCEDURE
)
2097 if (e
->symtree
->n
.sym
->attr
.proc
== PROC_INTERNAL
)
2099 gfc_error ("Passing internal procedure at %L by location "
2100 "not allowed", &e
->where
);
2106 comp
= gfc_get_proc_ptr_comp(e
);
2107 if (e
->expr_type
== EXPR_VARIABLE
2108 && comp
&& comp
->attr
.elemental
)
2110 gfc_error ("ELEMENTAL procedure pointer component %qs is not "
2111 "allowed as an actual argument at %L", comp
->name
,
2115 /* Fortran 2008, C1237. */
2116 if (e
->expr_type
== EXPR_VARIABLE
&& gfc_is_coindexed (e
)
2117 && gfc_has_ultimate_pointer (e
))
2119 gfc_error ("Coindexed actual argument at %L with ultimate pointer "
2120 "component", &e
->where
);
2124 first_actual_arg
= false;
2127 return_value
= true;
2130 actual_arg
= actual_arg_sav
;
2131 first_actual_arg
= first_actual_arg_sav
;
2133 return return_value
;
2137 /* Do the checks of the actual argument list that are specific to elemental
2138 procedures. If called with c == NULL, we have a function, otherwise if
2139 expr == NULL, we have a subroutine. */
2142 resolve_elemental_actual (gfc_expr
*expr
, gfc_code
*c
)
2144 gfc_actual_arglist
*arg0
;
2145 gfc_actual_arglist
*arg
;
2146 gfc_symbol
*esym
= NULL
;
2147 gfc_intrinsic_sym
*isym
= NULL
;
2149 gfc_intrinsic_arg
*iformal
= NULL
;
2150 gfc_formal_arglist
*eformal
= NULL
;
2151 bool formal_optional
= false;
2152 bool set_by_optional
= false;
2156 /* Is this an elemental procedure? */
2157 if (expr
&& expr
->value
.function
.actual
!= NULL
)
2159 if (expr
->value
.function
.esym
!= NULL
2160 && expr
->value
.function
.esym
->attr
.elemental
)
2162 arg0
= expr
->value
.function
.actual
;
2163 esym
= expr
->value
.function
.esym
;
2165 else if (expr
->value
.function
.isym
!= NULL
2166 && expr
->value
.function
.isym
->elemental
)
2168 arg0
= expr
->value
.function
.actual
;
2169 isym
= expr
->value
.function
.isym
;
2174 else if (c
&& c
->ext
.actual
!= NULL
)
2176 arg0
= c
->ext
.actual
;
2178 if (c
->resolved_sym
)
2179 esym
= c
->resolved_sym
;
2181 esym
= c
->symtree
->n
.sym
;
2184 if (!esym
->attr
.elemental
)
2190 /* The rank of an elemental is the rank of its array argument(s). */
2191 for (arg
= arg0
; arg
; arg
= arg
->next
)
2193 if (arg
->expr
!= NULL
&& arg
->expr
->rank
!= 0)
2195 rank
= arg
->expr
->rank
;
2196 if (arg
->expr
->expr_type
== EXPR_VARIABLE
2197 && arg
->expr
->symtree
->n
.sym
->attr
.optional
)
2198 set_by_optional
= true;
2200 /* Function specific; set the result rank and shape. */
2204 if (!expr
->shape
&& arg
->expr
->shape
)
2206 expr
->shape
= gfc_get_shape (rank
);
2207 for (i
= 0; i
< rank
; i
++)
2208 mpz_init_set (expr
->shape
[i
], arg
->expr
->shape
[i
]);
2215 /* If it is an array, it shall not be supplied as an actual argument
2216 to an elemental procedure unless an array of the same rank is supplied
2217 as an actual argument corresponding to a nonoptional dummy argument of
2218 that elemental procedure(12.4.1.5). */
2219 formal_optional
= false;
2221 iformal
= isym
->formal
;
2223 eformal
= esym
->formal
;
2225 for (arg
= arg0
; arg
; arg
= arg
->next
)
2229 if (eformal
->sym
&& eformal
->sym
->attr
.optional
)
2230 formal_optional
= true;
2231 eformal
= eformal
->next
;
2233 else if (isym
&& iformal
)
2235 if (iformal
->optional
)
2236 formal_optional
= true;
2237 iformal
= iformal
->next
;
2240 formal_optional
= true;
2242 if (pedantic
&& arg
->expr
!= NULL
2243 && arg
->expr
->expr_type
== EXPR_VARIABLE
2244 && arg
->expr
->symtree
->n
.sym
->attr
.optional
2247 && (set_by_optional
|| arg
->expr
->rank
!= rank
)
2248 && !(isym
&& isym
->id
== GFC_ISYM_CONVERSION
))
2250 gfc_warning (OPT_Wpedantic
,
2251 "%qs at %L is an array and OPTIONAL; IF IT IS "
2252 "MISSING, it cannot be the actual argument of an "
2253 "ELEMENTAL procedure unless there is a non-optional "
2254 "argument with the same rank (12.4.1.5)",
2255 arg
->expr
->symtree
->n
.sym
->name
, &arg
->expr
->where
);
2259 for (arg
= arg0
; arg
; arg
= arg
->next
)
2261 if (arg
->expr
== NULL
|| arg
->expr
->rank
== 0)
2264 /* Being elemental, the last upper bound of an assumed size array
2265 argument must be present. */
2266 if (resolve_assumed_size_actual (arg
->expr
))
2269 /* Elemental procedure's array actual arguments must conform. */
2272 if (!gfc_check_conformance (arg
->expr
, e
, "elemental procedure"))
2279 /* INTENT(OUT) is only allowed for subroutines; if any actual argument
2280 is an array, the intent inout/out variable needs to be also an array. */
2281 if (rank
> 0 && esym
&& expr
== NULL
)
2282 for (eformal
= esym
->formal
, arg
= arg0
; arg
&& eformal
;
2283 arg
= arg
->next
, eformal
= eformal
->next
)
2284 if ((eformal
->sym
->attr
.intent
== INTENT_OUT
2285 || eformal
->sym
->attr
.intent
== INTENT_INOUT
)
2286 && arg
->expr
&& arg
->expr
->rank
== 0)
2288 gfc_error ("Actual argument at %L for INTENT(%s) dummy %qs of "
2289 "ELEMENTAL subroutine %qs is a scalar, but another "
2290 "actual argument is an array", &arg
->expr
->where
,
2291 (eformal
->sym
->attr
.intent
== INTENT_OUT
) ? "OUT"
2292 : "INOUT", eformal
->sym
->name
, esym
->name
);
2299 /* This function does the checking of references to global procedures
2300 as defined in sections 18.1 and 14.1, respectively, of the Fortran
2301 77 and 95 standards. It checks for a gsymbol for the name, making
2302 one if it does not already exist. If it already exists, then the
2303 reference being resolved must correspond to the type of gsymbol.
2304 Otherwise, the new symbol is equipped with the attributes of the
2305 reference. The corresponding code that is called in creating
2306 global entities is parse.c.
2308 In addition, for all but -std=legacy, the gsymbols are used to
2309 check the interfaces of external procedures from the same file.
2310 The namespace of the gsymbol is resolved and then, once this is
2311 done the interface is checked. */
2315 not_in_recursive (gfc_symbol
*sym
, gfc_namespace
*gsym_ns
)
2317 if (!gsym_ns
->proc_name
->attr
.recursive
)
2320 if (sym
->ns
== gsym_ns
)
2323 if (sym
->ns
->parent
&& sym
->ns
->parent
== gsym_ns
)
2330 not_entry_self_reference (gfc_symbol
*sym
, gfc_namespace
*gsym_ns
)
2332 if (gsym_ns
->entries
)
2334 gfc_entry_list
*entry
= gsym_ns
->entries
;
2336 for (; entry
; entry
= entry
->next
)
2338 if (strcmp (sym
->name
, entry
->sym
->name
) == 0)
2340 if (strcmp (gsym_ns
->proc_name
->name
,
2341 sym
->ns
->proc_name
->name
) == 0)
2345 && strcmp (gsym_ns
->proc_name
->name
,
2346 sym
->ns
->parent
->proc_name
->name
) == 0)
2355 /* Check for the requirement of an explicit interface. F08:12.4.2.2. */
2358 gfc_explicit_interface_required (gfc_symbol
*sym
, char *errmsg
, int err_len
)
2360 gfc_formal_arglist
*arg
= gfc_sym_get_dummy_args (sym
);
2362 for ( ; arg
; arg
= arg
->next
)
2367 if (arg
->sym
->attr
.allocatable
) /* (2a) */
2369 strncpy (errmsg
, _("allocatable argument"), err_len
);
2372 else if (arg
->sym
->attr
.asynchronous
)
2374 strncpy (errmsg
, _("asynchronous argument"), err_len
);
2377 else if (arg
->sym
->attr
.optional
)
2379 strncpy (errmsg
, _("optional argument"), err_len
);
2382 else if (arg
->sym
->attr
.pointer
)
2384 strncpy (errmsg
, _("pointer argument"), err_len
);
2387 else if (arg
->sym
->attr
.target
)
2389 strncpy (errmsg
, _("target argument"), err_len
);
2392 else if (arg
->sym
->attr
.value
)
2394 strncpy (errmsg
, _("value argument"), err_len
);
2397 else if (arg
->sym
->attr
.volatile_
)
2399 strncpy (errmsg
, _("volatile argument"), err_len
);
2402 else if (arg
->sym
->as
&& arg
->sym
->as
->type
== AS_ASSUMED_SHAPE
) /* (2b) */
2404 strncpy (errmsg
, _("assumed-shape argument"), err_len
);
2407 else if (arg
->sym
->as
&& arg
->sym
->as
->type
== AS_ASSUMED_RANK
) /* TS 29113, 6.2. */
2409 strncpy (errmsg
, _("assumed-rank argument"), err_len
);
2412 else if (arg
->sym
->attr
.codimension
) /* (2c) */
2414 strncpy (errmsg
, _("coarray argument"), err_len
);
2417 else if (false) /* (2d) TODO: parametrized derived type */
2419 strncpy (errmsg
, _("parametrized derived type argument"), err_len
);
2422 else if (arg
->sym
->ts
.type
== BT_CLASS
) /* (2e) */
2424 strncpy (errmsg
, _("polymorphic argument"), err_len
);
2427 else if (arg
->sym
->attr
.ext_attr
& (1 << EXT_ATTR_NO_ARG_CHECK
))
2429 strncpy (errmsg
, _("NO_ARG_CHECK attribute"), err_len
);
2432 else if (arg
->sym
->ts
.type
== BT_ASSUMED
)
2434 /* As assumed-type is unlimited polymorphic (cf. above).
2435 See also TS 29113, Note 6.1. */
2436 strncpy (errmsg
, _("assumed-type argument"), err_len
);
2441 if (sym
->attr
.function
)
2443 gfc_symbol
*res
= sym
->result
? sym
->result
: sym
;
2445 if (res
->attr
.dimension
) /* (3a) */
2447 strncpy (errmsg
, _("array result"), err_len
);
2450 else if (res
->attr
.pointer
|| res
->attr
.allocatable
) /* (3b) */
2452 strncpy (errmsg
, _("pointer or allocatable result"), err_len
);
2455 else if (res
->ts
.type
== BT_CHARACTER
&& res
->ts
.u
.cl
2456 && res
->ts
.u
.cl
->length
2457 && res
->ts
.u
.cl
->length
->expr_type
!= EXPR_CONSTANT
) /* (3c) */
2459 strncpy (errmsg
, _("result with non-constant character length"), err_len
);
2464 if (sym
->attr
.elemental
&& !sym
->attr
.intrinsic
) /* (4) */
2466 strncpy (errmsg
, _("elemental procedure"), err_len
);
2469 else if (sym
->attr
.is_bind_c
) /* (5) */
2471 strncpy (errmsg
, _("bind(c) procedure"), err_len
);
2480 resolve_global_procedure (gfc_symbol
*sym
, locus
*where
,
2481 gfc_actual_arglist
**actual
, int sub
)
2485 enum gfc_symbol_type type
;
2488 type
= sub
? GSYM_SUBROUTINE
: GSYM_FUNCTION
;
2490 gsym
= gfc_get_gsymbol (sym
->binding_label
? sym
->binding_label
: sym
->name
);
2492 if ((gsym
->type
!= GSYM_UNKNOWN
&& gsym
->type
!= type
))
2493 gfc_global_used (gsym
, where
);
2495 if ((sym
->attr
.if_source
== IFSRC_UNKNOWN
2496 || sym
->attr
.if_source
== IFSRC_IFBODY
)
2497 && gsym
->type
!= GSYM_UNKNOWN
2498 && !gsym
->binding_label
2500 && gsym
->ns
->resolved
!= -1
2501 && gsym
->ns
->proc_name
2502 && not_in_recursive (sym
, gsym
->ns
)
2503 && not_entry_self_reference (sym
, gsym
->ns
))
2505 gfc_symbol
*def_sym
;
2507 /* Resolve the gsymbol namespace if needed. */
2508 if (!gsym
->ns
->resolved
)
2510 gfc_symbol
*old_dt_list
;
2512 /* Stash away derived types so that the backend_decls do not
2514 old_dt_list
= gfc_derived_types
;
2515 gfc_derived_types
= NULL
;
2517 gfc_resolve (gsym
->ns
);
2519 /* Store the new derived types with the global namespace. */
2520 if (gfc_derived_types
)
2521 gsym
->ns
->derived_types
= gfc_derived_types
;
2523 /* Restore the derived types of this namespace. */
2524 gfc_derived_types
= old_dt_list
;
2527 /* Make sure that translation for the gsymbol occurs before
2528 the procedure currently being resolved. */
2529 ns
= gfc_global_ns_list
;
2530 for (; ns
&& ns
!= gsym
->ns
; ns
= ns
->sibling
)
2532 if (ns
->sibling
== gsym
->ns
)
2534 ns
->sibling
= gsym
->ns
->sibling
;
2535 gsym
->ns
->sibling
= gfc_global_ns_list
;
2536 gfc_global_ns_list
= gsym
->ns
;
2541 def_sym
= gsym
->ns
->proc_name
;
2543 /* This can happen if a binding name has been specified. */
2544 if (gsym
->binding_label
&& gsym
->sym_name
!= def_sym
->name
)
2545 gfc_find_symbol (gsym
->sym_name
, gsym
->ns
, 0, &def_sym
);
2547 if (def_sym
->attr
.entry_master
)
2549 gfc_entry_list
*entry
;
2550 for (entry
= gsym
->ns
->entries
; entry
; entry
= entry
->next
)
2551 if (strcmp (entry
->sym
->name
, sym
->name
) == 0)
2553 def_sym
= entry
->sym
;
2558 if (sym
->attr
.function
&& !gfc_compare_types (&sym
->ts
, &def_sym
->ts
))
2560 gfc_error ("Return type mismatch of function %qs at %L (%s/%s)",
2561 sym
->name
, &sym
->declared_at
, gfc_typename (&sym
->ts
),
2562 gfc_typename (&def_sym
->ts
));
2566 if (sym
->attr
.if_source
== IFSRC_UNKNOWN
2567 && gfc_explicit_interface_required (def_sym
, reason
, sizeof(reason
)))
2569 gfc_error ("Explicit interface required for %qs at %L: %s",
2570 sym
->name
, &sym
->declared_at
, reason
);
2574 if (!pedantic
&& (gfc_option
.allow_std
& GFC_STD_GNU
))
2575 /* Turn erros into warnings with -std=gnu and -std=legacy. */
2576 gfc_errors_to_warnings (true);
2578 if (!gfc_compare_interfaces (sym
, def_sym
, sym
->name
, 0, 1,
2579 reason
, sizeof(reason
), NULL
, NULL
))
2581 gfc_error_opt (OPT_Wargument_mismatch
,
2582 "Interface mismatch in global procedure %qs at %L:"
2583 " %s", sym
->name
, &sym
->declared_at
, reason
);
2588 || ((gfc_option
.warn_std
& GFC_STD_LEGACY
)
2589 && !(gfc_option
.warn_std
& GFC_STD_GNU
)))
2590 gfc_errors_to_warnings (true);
2592 if (sym
->attr
.if_source
!= IFSRC_IFBODY
)
2593 gfc_procedure_use (def_sym
, actual
, where
);
2597 gfc_errors_to_warnings (false);
2599 if (gsym
->type
== GSYM_UNKNOWN
)
2602 gsym
->where
= *where
;
2609 /************* Function resolution *************/
2611 /* Resolve a function call known to be generic.
2612 Section 14.1.2.4.1. */
2615 resolve_generic_f0 (gfc_expr
*expr
, gfc_symbol
*sym
)
2619 if (sym
->attr
.generic
)
2621 s
= gfc_search_interface (sym
->generic
, 0, &expr
->value
.function
.actual
);
2624 expr
->value
.function
.name
= s
->name
;
2625 expr
->value
.function
.esym
= s
;
2627 if (s
->ts
.type
!= BT_UNKNOWN
)
2629 else if (s
->result
!= NULL
&& s
->result
->ts
.type
!= BT_UNKNOWN
)
2630 expr
->ts
= s
->result
->ts
;
2633 expr
->rank
= s
->as
->rank
;
2634 else if (s
->result
!= NULL
&& s
->result
->as
!= NULL
)
2635 expr
->rank
= s
->result
->as
->rank
;
2637 gfc_set_sym_referenced (expr
->value
.function
.esym
);
2642 /* TODO: Need to search for elemental references in generic
2646 if (sym
->attr
.intrinsic
)
2647 return gfc_intrinsic_func_interface (expr
, 0);
2654 resolve_generic_f (gfc_expr
*expr
)
2658 gfc_interface
*intr
= NULL
;
2660 sym
= expr
->symtree
->n
.sym
;
2664 m
= resolve_generic_f0 (expr
, sym
);
2667 else if (m
== MATCH_ERROR
)
2672 for (intr
= sym
->generic
; intr
; intr
= intr
->next
)
2673 if (gfc_fl_struct (intr
->sym
->attr
.flavor
))
2676 if (sym
->ns
->parent
== NULL
)
2678 gfc_find_symbol (sym
->name
, sym
->ns
->parent
, 1, &sym
);
2682 if (!generic_sym (sym
))
2686 /* Last ditch attempt. See if the reference is to an intrinsic
2687 that possesses a matching interface. 14.1.2.4 */
2688 if (sym
&& !intr
&& !gfc_is_intrinsic (sym
, 0, expr
->where
))
2690 if (gfc_init_expr_flag
)
2691 gfc_error ("Function %qs in initialization expression at %L "
2692 "must be an intrinsic function",
2693 expr
->symtree
->n
.sym
->name
, &expr
->where
);
2695 gfc_error ("There is no specific function for the generic %qs "
2696 "at %L", expr
->symtree
->n
.sym
->name
, &expr
->where
);
2702 if (!gfc_convert_to_structure_constructor (expr
, intr
->sym
, NULL
,
2705 if (!gfc_use_derived (expr
->ts
.u
.derived
))
2707 return resolve_structure_cons (expr
, 0);
2710 m
= gfc_intrinsic_func_interface (expr
, 0);
2715 gfc_error ("Generic function %qs at %L is not consistent with a "
2716 "specific intrinsic interface", expr
->symtree
->n
.sym
->name
,
2723 /* Resolve a function call known to be specific. */
2726 resolve_specific_f0 (gfc_symbol
*sym
, gfc_expr
*expr
)
2730 if (sym
->attr
.external
|| sym
->attr
.if_source
== IFSRC_IFBODY
)
2732 if (sym
->attr
.dummy
)
2734 sym
->attr
.proc
= PROC_DUMMY
;
2738 sym
->attr
.proc
= PROC_EXTERNAL
;
2742 if (sym
->attr
.proc
== PROC_MODULE
2743 || sym
->attr
.proc
== PROC_ST_FUNCTION
2744 || sym
->attr
.proc
== PROC_INTERNAL
)
2747 if (sym
->attr
.intrinsic
)
2749 m
= gfc_intrinsic_func_interface (expr
, 1);
2753 gfc_error ("Function %qs at %L is INTRINSIC but is not compatible "
2754 "with an intrinsic", sym
->name
, &expr
->where
);
2762 gfc_procedure_use (sym
, &expr
->value
.function
.actual
, &expr
->where
);
2765 expr
->ts
= sym
->result
->ts
;
2768 expr
->value
.function
.name
= sym
->name
;
2769 expr
->value
.function
.esym
= sym
;
2770 /* Prevent crash when sym->ts.u.derived->components is not set due to previous
2772 if (sym
->ts
.type
== BT_CLASS
&& !CLASS_DATA (sym
))
2774 if (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
)->as
)
2775 expr
->rank
= CLASS_DATA (sym
)->as
->rank
;
2776 else if (sym
->as
!= NULL
)
2777 expr
->rank
= sym
->as
->rank
;
2784 resolve_specific_f (gfc_expr
*expr
)
2789 sym
= expr
->symtree
->n
.sym
;
2793 m
= resolve_specific_f0 (sym
, expr
);
2796 if (m
== MATCH_ERROR
)
2799 if (sym
->ns
->parent
== NULL
)
2802 gfc_find_symbol (sym
->name
, sym
->ns
->parent
, 1, &sym
);
2808 gfc_error ("Unable to resolve the specific function %qs at %L",
2809 expr
->symtree
->n
.sym
->name
, &expr
->where
);
2814 /* Recursively append candidate SYM to CANDIDATES. Store the number of
2815 candidates in CANDIDATES_LEN. */
2818 lookup_function_fuzzy_find_candidates (gfc_symtree
*sym
,
2820 size_t &candidates_len
)
2826 if ((sym
->n
.sym
->ts
.type
!= BT_UNKNOWN
|| sym
->n
.sym
->attr
.external
)
2827 && sym
->n
.sym
->attr
.flavor
== FL_PROCEDURE
)
2828 vec_push (candidates
, candidates_len
, sym
->name
);
2832 lookup_function_fuzzy_find_candidates (p
, candidates
, candidates_len
);
2836 lookup_function_fuzzy_find_candidates (p
, candidates
, candidates_len
);
2840 /* Lookup function FN fuzzily, taking names in SYMROOT into account. */
2843 gfc_lookup_function_fuzzy (const char *fn
, gfc_symtree
*symroot
)
2845 char **candidates
= NULL
;
2846 size_t candidates_len
= 0;
2847 lookup_function_fuzzy_find_candidates (symroot
, candidates
, candidates_len
);
2848 return gfc_closest_fuzzy_match (fn
, candidates
);
2852 /* Resolve a procedure call not known to be generic nor specific. */
2855 resolve_unknown_f (gfc_expr
*expr
)
2860 sym
= expr
->symtree
->n
.sym
;
2862 if (sym
->attr
.dummy
)
2864 sym
->attr
.proc
= PROC_DUMMY
;
2865 expr
->value
.function
.name
= sym
->name
;
2869 /* See if we have an intrinsic function reference. */
2871 if (gfc_is_intrinsic (sym
, 0, expr
->where
))
2873 if (gfc_intrinsic_func_interface (expr
, 1) == MATCH_YES
)
2878 /* The reference is to an external name. */
2880 sym
->attr
.proc
= PROC_EXTERNAL
;
2881 expr
->value
.function
.name
= sym
->name
;
2882 expr
->value
.function
.esym
= expr
->symtree
->n
.sym
;
2884 if (sym
->as
!= NULL
)
2885 expr
->rank
= sym
->as
->rank
;
2887 /* Type of the expression is either the type of the symbol or the
2888 default type of the symbol. */
2891 gfc_procedure_use (sym
, &expr
->value
.function
.actual
, &expr
->where
);
2893 if (sym
->ts
.type
!= BT_UNKNOWN
)
2897 ts
= gfc_get_default_type (sym
->name
, sym
->ns
);
2899 if (ts
->type
== BT_UNKNOWN
)
2902 = gfc_lookup_function_fuzzy (sym
->name
, sym
->ns
->sym_root
);
2904 gfc_error ("Function %qs at %L has no IMPLICIT type"
2905 "; did you mean %qs?",
2906 sym
->name
, &expr
->where
, guessed
);
2908 gfc_error ("Function %qs at %L has no IMPLICIT type",
2909 sym
->name
, &expr
->where
);
2920 /* Return true, if the symbol is an external procedure. */
2922 is_external_proc (gfc_symbol
*sym
)
2924 if (!sym
->attr
.dummy
&& !sym
->attr
.contained
2925 && !gfc_is_intrinsic (sym
, sym
->attr
.subroutine
, sym
->declared_at
)
2926 && sym
->attr
.proc
!= PROC_ST_FUNCTION
2927 && !sym
->attr
.proc_pointer
2928 && !sym
->attr
.use_assoc
2936 /* Figure out if a function reference is pure or not. Also set the name
2937 of the function for a potential error message. Return nonzero if the
2938 function is PURE, zero if not. */
2940 pure_stmt_function (gfc_expr
*, gfc_symbol
*);
2943 gfc_pure_function (gfc_expr
*e
, const char **name
)
2946 gfc_component
*comp
;
2950 if (e
->symtree
!= NULL
2951 && e
->symtree
->n
.sym
!= NULL
2952 && e
->symtree
->n
.sym
->attr
.proc
== PROC_ST_FUNCTION
)
2953 return pure_stmt_function (e
, e
->symtree
->n
.sym
);
2955 comp
= gfc_get_proc_ptr_comp (e
);
2958 pure
= gfc_pure (comp
->ts
.interface
);
2961 else if (e
->value
.function
.esym
)
2963 pure
= gfc_pure (e
->value
.function
.esym
);
2964 *name
= e
->value
.function
.esym
->name
;
2966 else if (e
->value
.function
.isym
)
2968 pure
= e
->value
.function
.isym
->pure
2969 || e
->value
.function
.isym
->elemental
;
2970 *name
= e
->value
.function
.isym
->name
;
2974 /* Implicit functions are not pure. */
2976 *name
= e
->value
.function
.name
;
2983 /* Check if the expression is a reference to an implicitly pure function. */
2986 gfc_implicit_pure_function (gfc_expr
*e
)
2988 gfc_component
*comp
= gfc_get_proc_ptr_comp (e
);
2990 return gfc_implicit_pure (comp
->ts
.interface
);
2991 else if (e
->value
.function
.esym
)
2992 return gfc_implicit_pure (e
->value
.function
.esym
);
2999 impure_stmt_fcn (gfc_expr
*e
, gfc_symbol
*sym
,
3000 int *f ATTRIBUTE_UNUSED
)
3004 /* Don't bother recursing into other statement functions
3005 since they will be checked individually for purity. */
3006 if (e
->expr_type
!= EXPR_FUNCTION
3008 || e
->symtree
->n
.sym
== sym
3009 || e
->symtree
->n
.sym
->attr
.proc
== PROC_ST_FUNCTION
)
3012 return gfc_pure_function (e
, &name
) ? false : true;
3017 pure_stmt_function (gfc_expr
*e
, gfc_symbol
*sym
)
3019 return gfc_traverse_expr (e
, sym
, impure_stmt_fcn
, 0) ? 0 : 1;
3023 /* Check if an impure function is allowed in the current context. */
3025 static bool check_pure_function (gfc_expr
*e
)
3027 const char *name
= NULL
;
3028 if (!gfc_pure_function (e
, &name
) && name
)
3032 gfc_error ("Reference to impure function %qs at %L inside a "
3033 "FORALL %s", name
, &e
->where
,
3034 forall_flag
== 2 ? "mask" : "block");
3037 else if (gfc_do_concurrent_flag
)
3039 gfc_error ("Reference to impure function %qs at %L inside a "
3040 "DO CONCURRENT %s", name
, &e
->where
,
3041 gfc_do_concurrent_flag
== 2 ? "mask" : "block");
3044 else if (gfc_pure (NULL
))
3046 gfc_error ("Reference to impure function %qs at %L "
3047 "within a PURE procedure", name
, &e
->where
);
3050 if (!gfc_implicit_pure_function (e
))
3051 gfc_unset_implicit_pure (NULL
);
3057 /* Update current procedure's array_outer_dependency flag, considering
3058 a call to procedure SYM. */
3061 update_current_proc_array_outer_dependency (gfc_symbol
*sym
)
3063 /* Check to see if this is a sibling function that has not yet
3065 gfc_namespace
*sibling
= gfc_current_ns
->sibling
;
3066 for (; sibling
; sibling
= sibling
->sibling
)
3068 if (sibling
->proc_name
== sym
)
3070 gfc_resolve (sibling
);
3075 /* If SYM has references to outer arrays, so has the procedure calling
3076 SYM. If SYM is a procedure pointer, we can assume the worst. */
3077 if ((sym
->attr
.array_outer_dependency
|| sym
->attr
.proc_pointer
)
3078 && gfc_current_ns
->proc_name
)
3079 gfc_current_ns
->proc_name
->attr
.array_outer_dependency
= 1;
3083 /* Resolve a function call, which means resolving the arguments, then figuring
3084 out which entity the name refers to. */
3087 resolve_function (gfc_expr
*expr
)
3089 gfc_actual_arglist
*arg
;
3093 procedure_type p
= PROC_INTRINSIC
;
3094 bool no_formal_args
;
3098 sym
= expr
->symtree
->n
.sym
;
3100 /* If this is a procedure pointer component, it has already been resolved. */
3101 if (gfc_is_proc_ptr_comp (expr
))
3104 /* Avoid re-resolving the arguments of caf_get, which can lead to inserting
3106 if (sym
&& sym
->attr
.intrinsic
3107 && (sym
->intmod_sym_id
== GFC_ISYM_CAF_GET
3108 || sym
->intmod_sym_id
== GFC_ISYM_CAF_SEND
))
3111 if (sym
&& sym
->attr
.intrinsic
3112 && !gfc_resolve_intrinsic (sym
, &expr
->where
))
3115 if (sym
&& (sym
->attr
.flavor
== FL_VARIABLE
|| sym
->attr
.subroutine
))
3117 gfc_error ("%qs at %L is not a function", sym
->name
, &expr
->where
);
3121 /* If this is a deferred TBP with an abstract interface (which may
3122 of course be referenced), expr->value.function.esym will be set. */
3123 if (sym
&& sym
->attr
.abstract
&& !expr
->value
.function
.esym
)
3125 gfc_error ("ABSTRACT INTERFACE %qs must not be referenced at %L",
3126 sym
->name
, &expr
->where
);
3130 /* If this is a deferred TBP with an abstract interface, its result
3131 cannot be an assumed length character (F2003: C418). */
3132 if (sym
&& sym
->attr
.abstract
&& sym
->attr
.function
3133 && sym
->result
->ts
.u
.cl
3134 && sym
->result
->ts
.u
.cl
->length
== NULL
3135 && !sym
->result
->ts
.deferred
)
3137 gfc_error ("ABSTRACT INTERFACE %qs at %L must not have an assumed "
3138 "character length result (F2008: C418)", sym
->name
,
3143 /* Switch off assumed size checking and do this again for certain kinds
3144 of procedure, once the procedure itself is resolved. */
3145 need_full_assumed_size
++;
3147 if (expr
->symtree
&& expr
->symtree
->n
.sym
)
3148 p
= expr
->symtree
->n
.sym
->attr
.proc
;
3150 if (expr
->value
.function
.isym
&& expr
->value
.function
.isym
->inquiry
)
3151 inquiry_argument
= true;
3152 no_formal_args
= sym
&& is_external_proc (sym
)
3153 && gfc_sym_get_dummy_args (sym
) == NULL
;
3155 if (!resolve_actual_arglist (expr
->value
.function
.actual
,
3158 inquiry_argument
= false;
3162 inquiry_argument
= false;
3164 /* Resume assumed_size checking. */
3165 need_full_assumed_size
--;
3167 /* If the procedure is external, check for usage. */
3168 if (sym
&& is_external_proc (sym
))
3169 resolve_global_procedure (sym
, &expr
->where
,
3170 &expr
->value
.function
.actual
, 0);
3172 if (sym
&& sym
->ts
.type
== BT_CHARACTER
3174 && sym
->ts
.u
.cl
->length
== NULL
3176 && !sym
->ts
.deferred
3177 && expr
->value
.function
.esym
== NULL
3178 && !sym
->attr
.contained
)
3180 /* Internal procedures are taken care of in resolve_contained_fntype. */
3181 gfc_error ("Function %qs is declared CHARACTER(*) and cannot "
3182 "be used at %L since it is not a dummy argument",
3183 sym
->name
, &expr
->where
);
3187 /* See if function is already resolved. */
3189 if (expr
->value
.function
.name
!= NULL
3190 || expr
->value
.function
.isym
!= NULL
)
3192 if (expr
->ts
.type
== BT_UNKNOWN
)
3198 /* Apply the rules of section 14.1.2. */
3200 switch (procedure_kind (sym
))
3203 t
= resolve_generic_f (expr
);
3206 case PTYPE_SPECIFIC
:
3207 t
= resolve_specific_f (expr
);
3211 t
= resolve_unknown_f (expr
);
3215 gfc_internal_error ("resolve_function(): bad function type");
3219 /* If the expression is still a function (it might have simplified),
3220 then we check to see if we are calling an elemental function. */
3222 if (expr
->expr_type
!= EXPR_FUNCTION
)
3225 temp
= need_full_assumed_size
;
3226 need_full_assumed_size
= 0;
3228 if (!resolve_elemental_actual (expr
, NULL
))
3231 if (omp_workshare_flag
3232 && expr
->value
.function
.esym
3233 && ! gfc_elemental (expr
->value
.function
.esym
))
3235 gfc_error ("User defined non-ELEMENTAL function %qs at %L not allowed "
3236 "in WORKSHARE construct", expr
->value
.function
.esym
->name
,
3241 #define GENERIC_ID expr->value.function.isym->id
3242 else if (expr
->value
.function
.actual
!= NULL
3243 && expr
->value
.function
.isym
!= NULL
3244 && GENERIC_ID
!= GFC_ISYM_LBOUND
3245 && GENERIC_ID
!= GFC_ISYM_LCOBOUND
3246 && GENERIC_ID
!= GFC_ISYM_UCOBOUND
3247 && GENERIC_ID
!= GFC_ISYM_LEN
3248 && GENERIC_ID
!= GFC_ISYM_LOC
3249 && GENERIC_ID
!= GFC_ISYM_C_LOC
3250 && GENERIC_ID
!= GFC_ISYM_PRESENT
)
3252 /* Array intrinsics must also have the last upper bound of an
3253 assumed size array argument. UBOUND and SIZE have to be
3254 excluded from the check if the second argument is anything
3257 for (arg
= expr
->value
.function
.actual
; arg
; arg
= arg
->next
)
3259 if ((GENERIC_ID
== GFC_ISYM_UBOUND
|| GENERIC_ID
== GFC_ISYM_SIZE
)
3260 && arg
== expr
->value
.function
.actual
3261 && arg
->next
!= NULL
&& arg
->next
->expr
)
3263 if (arg
->next
->expr
->expr_type
!= EXPR_CONSTANT
)
3266 if (arg
->next
->name
&& strcmp (arg
->next
->name
, "kind") == 0)
3269 if ((int)mpz_get_si (arg
->next
->expr
->value
.integer
)
3274 if (arg
->expr
!= NULL
3275 && arg
->expr
->rank
> 0
3276 && resolve_assumed_size_actual (arg
->expr
))
3282 need_full_assumed_size
= temp
;
3284 if (!check_pure_function(expr
))
3287 /* Functions without the RECURSIVE attribution are not allowed to
3288 * call themselves. */
3289 if (expr
->value
.function
.esym
&& !expr
->value
.function
.esym
->attr
.recursive
)
3292 esym
= expr
->value
.function
.esym
;
3294 if (is_illegal_recursion (esym
, gfc_current_ns
))
3296 if (esym
->attr
.entry
&& esym
->ns
->entries
)
3297 gfc_error ("ENTRY %qs at %L cannot be called recursively, as"
3298 " function %qs is not RECURSIVE",
3299 esym
->name
, &expr
->where
, esym
->ns
->entries
->sym
->name
);
3301 gfc_error ("Function %qs at %L cannot be called recursively, as it"
3302 " is not RECURSIVE", esym
->name
, &expr
->where
);
3308 /* Character lengths of use associated functions may contains references to
3309 symbols not referenced from the current program unit otherwise. Make sure
3310 those symbols are marked as referenced. */
3312 if (expr
->ts
.type
== BT_CHARACTER
&& expr
->value
.function
.esym
3313 && expr
->value
.function
.esym
->attr
.use_assoc
)
3315 gfc_expr_set_symbols_referenced (expr
->ts
.u
.cl
->length
);
3318 /* Make sure that the expression has a typespec that works. */
3319 if (expr
->ts
.type
== BT_UNKNOWN
)
3321 if (expr
->symtree
->n
.sym
->result
3322 && expr
->symtree
->n
.sym
->result
->ts
.type
!= BT_UNKNOWN
3323 && !expr
->symtree
->n
.sym
->result
->attr
.proc_pointer
)
3324 expr
->ts
= expr
->symtree
->n
.sym
->result
->ts
;
3327 if (!expr
->ref
&& !expr
->value
.function
.isym
)
3329 if (expr
->value
.function
.esym
)
3330 update_current_proc_array_outer_dependency (expr
->value
.function
.esym
);
3332 update_current_proc_array_outer_dependency (sym
);
3335 /* typebound procedure: Assume the worst. */
3336 gfc_current_ns
->proc_name
->attr
.array_outer_dependency
= 1;
3342 /************* Subroutine resolution *************/
3345 pure_subroutine (gfc_symbol
*sym
, const char *name
, locus
*loc
)
3352 gfc_error ("Subroutine call to %qs in FORALL block at %L is not PURE",
3356 else if (gfc_do_concurrent_flag
)
3358 gfc_error ("Subroutine call to %qs in DO CONCURRENT block at %L is not "
3362 else if (gfc_pure (NULL
))
3364 gfc_error ("Subroutine call to %qs at %L is not PURE", name
, loc
);
3368 gfc_unset_implicit_pure (NULL
);
3374 resolve_generic_s0 (gfc_code
*c
, gfc_symbol
*sym
)
3378 if (sym
->attr
.generic
)
3380 s
= gfc_search_interface (sym
->generic
, 1, &c
->ext
.actual
);
3383 c
->resolved_sym
= s
;
3384 if (!pure_subroutine (s
, s
->name
, &c
->loc
))
3389 /* TODO: Need to search for elemental references in generic interface. */
3392 if (sym
->attr
.intrinsic
)
3393 return gfc_intrinsic_sub_interface (c
, 0);
3400 resolve_generic_s (gfc_code
*c
)
3405 sym
= c
->symtree
->n
.sym
;
3409 m
= resolve_generic_s0 (c
, sym
);
3412 else if (m
== MATCH_ERROR
)
3416 if (sym
->ns
->parent
== NULL
)
3418 gfc_find_symbol (sym
->name
, sym
->ns
->parent
, 1, &sym
);
3422 if (!generic_sym (sym
))
3426 /* Last ditch attempt. See if the reference is to an intrinsic
3427 that possesses a matching interface. 14.1.2.4 */
3428 sym
= c
->symtree
->n
.sym
;
3430 if (!gfc_is_intrinsic (sym
, 1, c
->loc
))
3432 gfc_error ("There is no specific subroutine for the generic %qs at %L",
3433 sym
->name
, &c
->loc
);
3437 m
= gfc_intrinsic_sub_interface (c
, 0);
3441 gfc_error ("Generic subroutine %qs at %L is not consistent with an "
3442 "intrinsic subroutine interface", sym
->name
, &c
->loc
);
3448 /* Resolve a subroutine call known to be specific. */
3451 resolve_specific_s0 (gfc_code
*c
, gfc_symbol
*sym
)
3455 if (sym
->attr
.external
|| sym
->attr
.if_source
== IFSRC_IFBODY
)
3457 if (sym
->attr
.dummy
)
3459 sym
->attr
.proc
= PROC_DUMMY
;
3463 sym
->attr
.proc
= PROC_EXTERNAL
;
3467 if (sym
->attr
.proc
== PROC_MODULE
|| sym
->attr
.proc
== PROC_INTERNAL
)
3470 if (sym
->attr
.intrinsic
)
3472 m
= gfc_intrinsic_sub_interface (c
, 1);
3476 gfc_error ("Subroutine %qs at %L is INTRINSIC but is not compatible "
3477 "with an intrinsic", sym
->name
, &c
->loc
);
3485 gfc_procedure_use (sym
, &c
->ext
.actual
, &c
->loc
);
3487 c
->resolved_sym
= sym
;
3488 if (!pure_subroutine (sym
, sym
->name
, &c
->loc
))
3496 resolve_specific_s (gfc_code
*c
)
3501 sym
= c
->symtree
->n
.sym
;
3505 m
= resolve_specific_s0 (c
, sym
);
3508 if (m
== MATCH_ERROR
)
3511 if (sym
->ns
->parent
== NULL
)
3514 gfc_find_symbol (sym
->name
, sym
->ns
->parent
, 1, &sym
);
3520 sym
= c
->symtree
->n
.sym
;
3521 gfc_error ("Unable to resolve the specific subroutine %qs at %L",
3522 sym
->name
, &c
->loc
);
3528 /* Resolve a subroutine call not known to be generic nor specific. */
3531 resolve_unknown_s (gfc_code
*c
)
3535 sym
= c
->symtree
->n
.sym
;
3537 if (sym
->attr
.dummy
)
3539 sym
->attr
.proc
= PROC_DUMMY
;
3543 /* See if we have an intrinsic function reference. */
3545 if (gfc_is_intrinsic (sym
, 1, c
->loc
))
3547 if (gfc_intrinsic_sub_interface (c
, 1) == MATCH_YES
)
3552 /* The reference is to an external name. */
3555 gfc_procedure_use (sym
, &c
->ext
.actual
, &c
->loc
);
3557 c
->resolved_sym
= sym
;
3559 return pure_subroutine (sym
, sym
->name
, &c
->loc
);
3563 /* Resolve a subroutine call. Although it was tempting to use the same code
3564 for functions, subroutines and functions are stored differently and this
3565 makes things awkward. */
3568 resolve_call (gfc_code
*c
)
3571 procedure_type ptype
= PROC_INTRINSIC
;
3572 gfc_symbol
*csym
, *sym
;
3573 bool no_formal_args
;
3575 csym
= c
->symtree
? c
->symtree
->n
.sym
: NULL
;
3577 if (csym
&& csym
->ts
.type
!= BT_UNKNOWN
)
3579 gfc_error ("%qs at %L has a type, which is not consistent with "
3580 "the CALL at %L", csym
->name
, &csym
->declared_at
, &c
->loc
);
3584 if (csym
&& gfc_current_ns
->parent
&& csym
->ns
!= gfc_current_ns
)
3587 gfc_find_sym_tree (c
->symtree
->name
, gfc_current_ns
, 1, &st
);
3588 sym
= st
? st
->n
.sym
: NULL
;
3589 if (sym
&& csym
!= sym
3590 && sym
->ns
== gfc_current_ns
3591 && sym
->attr
.flavor
== FL_PROCEDURE
3592 && sym
->attr
.contained
)
3595 if (csym
->attr
.generic
)
3596 c
->symtree
->n
.sym
= sym
;
3599 csym
= c
->symtree
->n
.sym
;
3603 /* If this ia a deferred TBP, c->expr1 will be set. */
3604 if (!c
->expr1
&& csym
)
3606 if (csym
->attr
.abstract
)
3608 gfc_error ("ABSTRACT INTERFACE %qs must not be referenced at %L",
3609 csym
->name
, &c
->loc
);
3613 /* Subroutines without the RECURSIVE attribution are not allowed to
3615 if (is_illegal_recursion (csym
, gfc_current_ns
))
3617 if (csym
->attr
.entry
&& csym
->ns
->entries
)
3618 gfc_error ("ENTRY %qs at %L cannot be called recursively, "
3619 "as subroutine %qs is not RECURSIVE",
3620 csym
->name
, &c
->loc
, csym
->ns
->entries
->sym
->name
);
3622 gfc_error ("SUBROUTINE %qs at %L cannot be called recursively, "
3623 "as it is not RECURSIVE", csym
->name
, &c
->loc
);
3629 /* Switch off assumed size checking and do this again for certain kinds
3630 of procedure, once the procedure itself is resolved. */
3631 need_full_assumed_size
++;
3634 ptype
= csym
->attr
.proc
;
3636 no_formal_args
= csym
&& is_external_proc (csym
)
3637 && gfc_sym_get_dummy_args (csym
) == NULL
;
3638 if (!resolve_actual_arglist (c
->ext
.actual
, ptype
, no_formal_args
))
3641 /* Resume assumed_size checking. */
3642 need_full_assumed_size
--;
3644 /* If external, check for usage. */
3645 if (csym
&& is_external_proc (csym
))
3646 resolve_global_procedure (csym
, &c
->loc
, &c
->ext
.actual
, 1);
3649 if (c
->resolved_sym
== NULL
)
3651 c
->resolved_isym
= NULL
;
3652 switch (procedure_kind (csym
))
3655 t
= resolve_generic_s (c
);
3658 case PTYPE_SPECIFIC
:
3659 t
= resolve_specific_s (c
);
3663 t
= resolve_unknown_s (c
);
3667 gfc_internal_error ("resolve_subroutine(): bad function type");
3671 /* Some checks of elemental subroutine actual arguments. */
3672 if (!resolve_elemental_actual (NULL
, c
))
3676 update_current_proc_array_outer_dependency (csym
);
3678 /* Typebound procedure: Assume the worst. */
3679 gfc_current_ns
->proc_name
->attr
.array_outer_dependency
= 1;
3685 /* Compare the shapes of two arrays that have non-NULL shapes. If both
3686 op1->shape and op2->shape are non-NULL return true if their shapes
3687 match. If both op1->shape and op2->shape are non-NULL return false
3688 if their shapes do not match. If either op1->shape or op2->shape is
3689 NULL, return true. */
3692 compare_shapes (gfc_expr
*op1
, gfc_expr
*op2
)
3699 if (op1
->shape
!= NULL
&& op2
->shape
!= NULL
)
3701 for (i
= 0; i
< op1
->rank
; i
++)
3703 if (mpz_cmp (op1
->shape
[i
], op2
->shape
[i
]) != 0)
3705 gfc_error ("Shapes for operands at %L and %L are not conformable",
3706 &op1
->where
, &op2
->where
);
3716 /* Convert a logical operator to the corresponding bitwise intrinsic call.
3717 For example A .AND. B becomes IAND(A, B). */
3719 logical_to_bitwise (gfc_expr
*e
)
3721 gfc_expr
*tmp
, *op1
, *op2
;
3723 gfc_actual_arglist
*args
= NULL
;
3725 gcc_assert (e
->expr_type
== EXPR_OP
);
3727 isym
= GFC_ISYM_NONE
;
3728 op1
= e
->value
.op
.op1
;
3729 op2
= e
->value
.op
.op2
;
3731 switch (e
->value
.op
.op
)
3734 isym
= GFC_ISYM_NOT
;
3737 isym
= GFC_ISYM_IAND
;
3740 isym
= GFC_ISYM_IOR
;
3742 case INTRINSIC_NEQV
:
3743 isym
= GFC_ISYM_IEOR
;
3746 /* "Bitwise eqv" is just the complement of NEQV === IEOR.
3747 Change the old expression to NEQV, which will get replaced by IEOR,
3748 and wrap it in NOT. */
3749 tmp
= gfc_copy_expr (e
);
3750 tmp
->value
.op
.op
= INTRINSIC_NEQV
;
3751 tmp
= logical_to_bitwise (tmp
);
3752 isym
= GFC_ISYM_NOT
;
3757 gfc_internal_error ("logical_to_bitwise(): Bad intrinsic");
3760 /* Inherit the original operation's operands as arguments. */
3761 args
= gfc_get_actual_arglist ();
3765 args
->next
= gfc_get_actual_arglist ();
3766 args
->next
->expr
= op2
;
3769 /* Convert the expression to a function call. */
3770 e
->expr_type
= EXPR_FUNCTION
;
3771 e
->value
.function
.actual
= args
;
3772 e
->value
.function
.isym
= gfc_intrinsic_function_by_id (isym
);
3773 e
->value
.function
.name
= e
->value
.function
.isym
->name
;
3774 e
->value
.function
.esym
= NULL
;
3776 /* Make up a pre-resolved function call symtree if we need to. */
3777 if (!e
->symtree
|| !e
->symtree
->n
.sym
)
3780 gfc_get_ha_sym_tree (e
->value
.function
.isym
->name
, &e
->symtree
);
3781 sym
= e
->symtree
->n
.sym
;
3783 sym
->attr
.flavor
= FL_PROCEDURE
;
3784 sym
->attr
.function
= 1;
3785 sym
->attr
.elemental
= 1;
3787 sym
->attr
.referenced
= 1;
3788 gfc_intrinsic_symbol (sym
);
3789 gfc_commit_symbol (sym
);
3792 args
->name
= e
->value
.function
.isym
->formal
->name
;
3793 if (e
->value
.function
.isym
->formal
->next
)
3794 args
->next
->name
= e
->value
.function
.isym
->formal
->next
->name
;
3799 /* Recursively append candidate UOP to CANDIDATES. Store the number of
3800 candidates in CANDIDATES_LEN. */
3802 lookup_uop_fuzzy_find_candidates (gfc_symtree
*uop
,
3804 size_t &candidates_len
)
3811 /* Not sure how to properly filter here. Use all for a start.
3812 n.uop.op is NULL for empty interface operators (is that legal?) disregard
3813 these as i suppose they don't make terribly sense. */
3815 if (uop
->n
.uop
->op
!= NULL
)
3816 vec_push (candidates
, candidates_len
, uop
->name
);
3820 lookup_uop_fuzzy_find_candidates (p
, candidates
, candidates_len
);
3824 lookup_uop_fuzzy_find_candidates (p
, candidates
, candidates_len
);
3827 /* Lookup user-operator OP fuzzily, taking names in UOP into account. */
3830 lookup_uop_fuzzy (const char *op
, gfc_symtree
*uop
)
3832 char **candidates
= NULL
;
3833 size_t candidates_len
= 0;
3834 lookup_uop_fuzzy_find_candidates (uop
, candidates
, candidates_len
);
3835 return gfc_closest_fuzzy_match (op
, candidates
);
3839 /* Callback finding an impure function as an operand to an .and. or
3840 .or. expression. Remember the last function warned about to
3841 avoid double warnings when recursing. */
3844 impure_function_callback (gfc_expr
**e
, int *walk_subtrees ATTRIBUTE_UNUSED
,
3849 static gfc_expr
*last
= NULL
;
3850 bool *found
= (bool *) data
;
3852 if (f
->expr_type
== EXPR_FUNCTION
)
3855 if (f
!= last
&& !gfc_pure_function (f
, &name
)
3856 && !gfc_implicit_pure_function (f
))
3859 gfc_warning (OPT_Wfunction_elimination
,
3860 "Impure function %qs at %L might not be evaluated",
3863 gfc_warning (OPT_Wfunction_elimination
,
3864 "Impure function at %L might not be evaluated",
3874 /* Resolve an operator expression node. This can involve replacing the
3875 operation with a user defined function call. */
3878 resolve_operator (gfc_expr
*e
)
3880 gfc_expr
*op1
, *op2
;
3882 bool dual_locus_error
;
3885 /* Resolve all subnodes-- give them types. */
3887 switch (e
->value
.op
.op
)
3890 if (!gfc_resolve_expr (e
->value
.op
.op2
))
3896 case INTRINSIC_UPLUS
:
3897 case INTRINSIC_UMINUS
:
3898 case INTRINSIC_PARENTHESES
:
3899 if (!gfc_resolve_expr (e
->value
.op
.op1
))
3904 /* Typecheck the new node. */
3906 op1
= e
->value
.op
.op1
;
3907 op2
= e
->value
.op
.op2
;
3908 dual_locus_error
= false;
3910 if ((op1
&& op1
->expr_type
== EXPR_NULL
)
3911 || (op2
&& op2
->expr_type
== EXPR_NULL
))
3913 sprintf (msg
, _("Invalid context for NULL() pointer at %%L"));
3917 switch (e
->value
.op
.op
)
3919 case INTRINSIC_UPLUS
:
3920 case INTRINSIC_UMINUS
:
3921 if (op1
->ts
.type
== BT_INTEGER
3922 || op1
->ts
.type
== BT_REAL
3923 || op1
->ts
.type
== BT_COMPLEX
)
3929 sprintf (msg
, _("Operand of unary numeric operator %%<%s%%> at %%L is %s"),
3930 gfc_op2string (e
->value
.op
.op
), gfc_typename (&e
->ts
));
3933 case INTRINSIC_PLUS
:
3934 case INTRINSIC_MINUS
:
3935 case INTRINSIC_TIMES
:
3936 case INTRINSIC_DIVIDE
:
3937 case INTRINSIC_POWER
:
3938 if (gfc_numeric_ts (&op1
->ts
) && gfc_numeric_ts (&op2
->ts
))
3940 gfc_type_convert_binary (e
, 1);
3944 if (op1
->ts
.type
== BT_DERIVED
|| op2
->ts
.type
== BT_DERIVED
)
3946 _("Unexpected derived-type entities in binary intrinsic "
3947 "numeric operator %%<%s%%> at %%L"),
3948 gfc_op2string (e
->value
.op
.op
));
3951 _("Operands of binary numeric operator %%<%s%%> at %%L are %s/%s"),
3952 gfc_op2string (e
->value
.op
.op
), gfc_typename (&op1
->ts
),
3953 gfc_typename (&op2
->ts
));
3956 case INTRINSIC_CONCAT
:
3957 if (op1
->ts
.type
== BT_CHARACTER
&& op2
->ts
.type
== BT_CHARACTER
3958 && op1
->ts
.kind
== op2
->ts
.kind
)
3960 e
->ts
.type
= BT_CHARACTER
;
3961 e
->ts
.kind
= op1
->ts
.kind
;
3966 _("Operands of string concatenation operator at %%L are %s/%s"),
3967 gfc_typename (&op1
->ts
), gfc_typename (&op2
->ts
));
3973 case INTRINSIC_NEQV
:
3974 if (op1
->ts
.type
== BT_LOGICAL
&& op2
->ts
.type
== BT_LOGICAL
)
3976 e
->ts
.type
= BT_LOGICAL
;
3977 e
->ts
.kind
= gfc_kind_max (op1
, op2
);
3978 if (op1
->ts
.kind
< e
->ts
.kind
)
3979 gfc_convert_type (op1
, &e
->ts
, 2);
3980 else if (op2
->ts
.kind
< e
->ts
.kind
)
3981 gfc_convert_type (op2
, &e
->ts
, 2);
3983 if (flag_frontend_optimize
&&
3984 (e
->value
.op
.op
== INTRINSIC_AND
|| e
->value
.op
.op
== INTRINSIC_OR
))
3986 /* Warn about short-circuiting
3987 with impure function as second operand. */
3989 gfc_expr_walker (&op2
, impure_function_callback
, &op2_f
);
3994 /* Logical ops on integers become bitwise ops with -fdec. */
3996 && (op1
->ts
.type
== BT_INTEGER
|| op2
->ts
.type
== BT_INTEGER
))
3998 e
->ts
.type
= BT_INTEGER
;
3999 e
->ts
.kind
= gfc_kind_max (op1
, op2
);
4000 if (op1
->ts
.type
!= e
->ts
.type
|| op1
->ts
.kind
!= e
->ts
.kind
)
4001 gfc_convert_type (op1
, &e
->ts
, 1);
4002 if (op2
->ts
.type
!= e
->ts
.type
|| op2
->ts
.kind
!= e
->ts
.kind
)
4003 gfc_convert_type (op2
, &e
->ts
, 1);
4004 e
= logical_to_bitwise (e
);
4008 sprintf (msg
, _("Operands of logical operator %%<%s%%> at %%L are %s/%s"),
4009 gfc_op2string (e
->value
.op
.op
), gfc_typename (&op1
->ts
),
4010 gfc_typename (&op2
->ts
));
4015 /* Logical ops on integers become bitwise ops with -fdec. */
4016 if (flag_dec
&& op1
->ts
.type
== BT_INTEGER
)
4018 e
->ts
.type
= BT_INTEGER
;
4019 e
->ts
.kind
= op1
->ts
.kind
;
4020 e
= logical_to_bitwise (e
);
4024 if (op1
->ts
.type
== BT_LOGICAL
)
4026 e
->ts
.type
= BT_LOGICAL
;
4027 e
->ts
.kind
= op1
->ts
.kind
;
4031 sprintf (msg
, _("Operand of .not. operator at %%L is %s"),
4032 gfc_typename (&op1
->ts
));
4036 case INTRINSIC_GT_OS
:
4038 case INTRINSIC_GE_OS
:
4040 case INTRINSIC_LT_OS
:
4042 case INTRINSIC_LE_OS
:
4043 if (op1
->ts
.type
== BT_COMPLEX
|| op2
->ts
.type
== BT_COMPLEX
)
4045 strcpy (msg
, _("COMPLEX quantities cannot be compared at %L"));
4052 case INTRINSIC_EQ_OS
:
4054 case INTRINSIC_NE_OS
:
4055 if (op1
->ts
.type
== BT_CHARACTER
&& op2
->ts
.type
== BT_CHARACTER
4056 && op1
->ts
.kind
== op2
->ts
.kind
)
4058 e
->ts
.type
= BT_LOGICAL
;
4059 e
->ts
.kind
= gfc_default_logical_kind
;
4063 if (gfc_numeric_ts (&op1
->ts
) && gfc_numeric_ts (&op2
->ts
))
4065 gfc_type_convert_binary (e
, 1);
4067 e
->ts
.type
= BT_LOGICAL
;
4068 e
->ts
.kind
= gfc_default_logical_kind
;
4070 if (warn_compare_reals
)
4072 gfc_intrinsic_op op
= e
->value
.op
.op
;
4074 /* Type conversion has made sure that the types of op1 and op2
4075 agree, so it is only necessary to check the first one. */
4076 if ((op1
->ts
.type
== BT_REAL
|| op1
->ts
.type
== BT_COMPLEX
)
4077 && (op
== INTRINSIC_EQ
|| op
== INTRINSIC_EQ_OS
4078 || op
== INTRINSIC_NE
|| op
== INTRINSIC_NE_OS
))
4082 if (op
== INTRINSIC_EQ
|| op
== INTRINSIC_EQ_OS
)
4083 msg
= "Equality comparison for %s at %L";
4085 msg
= "Inequality comparison for %s at %L";
4087 gfc_warning (OPT_Wcompare_reals
, msg
,
4088 gfc_typename (&op1
->ts
), &op1
->where
);
4095 if (op1
->ts
.type
== BT_LOGICAL
&& op2
->ts
.type
== BT_LOGICAL
)
4097 _("Logicals at %%L must be compared with %s instead of %s"),
4098 (e
->value
.op
.op
== INTRINSIC_EQ
4099 || e
->value
.op
.op
== INTRINSIC_EQ_OS
)
4100 ? ".eqv." : ".neqv.", gfc_op2string (e
->value
.op
.op
));
4103 _("Operands of comparison operator %%<%s%%> at %%L are %s/%s"),
4104 gfc_op2string (e
->value
.op
.op
), gfc_typename (&op1
->ts
),
4105 gfc_typename (&op2
->ts
));
4109 case INTRINSIC_USER
:
4110 if (e
->value
.op
.uop
->op
== NULL
)
4112 const char *name
= e
->value
.op
.uop
->name
;
4113 const char *guessed
;
4114 guessed
= lookup_uop_fuzzy (name
, e
->value
.op
.uop
->ns
->uop_root
);
4116 sprintf (msg
, _("Unknown operator %%<%s%%> at %%L; did you mean '%s'?"),
4119 sprintf (msg
, _("Unknown operator %%<%s%%> at %%L"), name
);
4121 else if (op2
== NULL
)
4122 sprintf (msg
, _("Operand of user operator %%<%s%%> at %%L is %s"),
4123 e
->value
.op
.uop
->name
, gfc_typename (&op1
->ts
));
4126 sprintf (msg
, _("Operands of user operator %%<%s%%> at %%L are %s/%s"),
4127 e
->value
.op
.uop
->name
, gfc_typename (&op1
->ts
),
4128 gfc_typename (&op2
->ts
));
4129 e
->value
.op
.uop
->op
->sym
->attr
.referenced
= 1;
4134 case INTRINSIC_PARENTHESES
:
4136 if (e
->ts
.type
== BT_CHARACTER
)
4137 e
->ts
.u
.cl
= op1
->ts
.u
.cl
;
4141 gfc_internal_error ("resolve_operator(): Bad intrinsic");
4144 /* Deal with arrayness of an operand through an operator. */
4148 switch (e
->value
.op
.op
)
4150 case INTRINSIC_PLUS
:
4151 case INTRINSIC_MINUS
:
4152 case INTRINSIC_TIMES
:
4153 case INTRINSIC_DIVIDE
:
4154 case INTRINSIC_POWER
:
4155 case INTRINSIC_CONCAT
:
4159 case INTRINSIC_NEQV
:
4161 case INTRINSIC_EQ_OS
:
4163 case INTRINSIC_NE_OS
:
4165 case INTRINSIC_GT_OS
:
4167 case INTRINSIC_GE_OS
:
4169 case INTRINSIC_LT_OS
:
4171 case INTRINSIC_LE_OS
:
4173 if (op1
->rank
== 0 && op2
->rank
== 0)
4176 if (op1
->rank
== 0 && op2
->rank
!= 0)
4178 e
->rank
= op2
->rank
;
4180 if (e
->shape
== NULL
)
4181 e
->shape
= gfc_copy_shape (op2
->shape
, op2
->rank
);
4184 if (op1
->rank
!= 0 && op2
->rank
== 0)
4186 e
->rank
= op1
->rank
;
4188 if (e
->shape
== NULL
)
4189 e
->shape
= gfc_copy_shape (op1
->shape
, op1
->rank
);
4192 if (op1
->rank
!= 0 && op2
->rank
!= 0)
4194 if (op1
->rank
== op2
->rank
)
4196 e
->rank
= op1
->rank
;
4197 if (e
->shape
== NULL
)
4199 t
= compare_shapes (op1
, op2
);
4203 e
->shape
= gfc_copy_shape (op1
->shape
, op1
->rank
);
4208 /* Allow higher level expressions to work. */
4211 /* Try user-defined operators, and otherwise throw an error. */
4212 dual_locus_error
= true;
4214 _("Inconsistent ranks for operator at %%L and %%L"));
4221 case INTRINSIC_PARENTHESES
:
4223 case INTRINSIC_UPLUS
:
4224 case INTRINSIC_UMINUS
:
4225 /* Simply copy arrayness attribute */
4226 e
->rank
= op1
->rank
;
4228 if (e
->shape
== NULL
)
4229 e
->shape
= gfc_copy_shape (op1
->shape
, op1
->rank
);
4237 /* Attempt to simplify the expression. */
4240 t
= gfc_simplify_expr (e
, 0);
4241 /* Some calls do not succeed in simplification and return false
4242 even though there is no error; e.g. variable references to
4243 PARAMETER arrays. */
4244 if (!gfc_is_constant_expr (e
))
4252 match m
= gfc_extend_expr (e
);
4255 if (m
== MATCH_ERROR
)
4259 if (dual_locus_error
)
4260 gfc_error (msg
, &op1
->where
, &op2
->where
);
4262 gfc_error (msg
, &e
->where
);
4268 /************** Array resolution subroutines **************/
4271 { CMP_LT
, CMP_EQ
, CMP_GT
, CMP_UNKNOWN
};
4273 /* Compare two integer expressions. */
4275 static compare_result
4276 compare_bound (gfc_expr
*a
, gfc_expr
*b
)
4280 if (a
== NULL
|| a
->expr_type
!= EXPR_CONSTANT
4281 || b
== NULL
|| b
->expr_type
!= EXPR_CONSTANT
)
4284 /* If either of the types isn't INTEGER, we must have
4285 raised an error earlier. */
4287 if (a
->ts
.type
!= BT_INTEGER
|| b
->ts
.type
!= BT_INTEGER
)
4290 i
= mpz_cmp (a
->value
.integer
, b
->value
.integer
);
4300 /* Compare an integer expression with an integer. */
4302 static compare_result
4303 compare_bound_int (gfc_expr
*a
, int b
)
4307 if (a
== NULL
|| a
->expr_type
!= EXPR_CONSTANT
)
4310 if (a
->ts
.type
!= BT_INTEGER
)
4311 gfc_internal_error ("compare_bound_int(): Bad expression");
4313 i
= mpz_cmp_si (a
->value
.integer
, b
);
4323 /* Compare an integer expression with a mpz_t. */
4325 static compare_result
4326 compare_bound_mpz_t (gfc_expr
*a
, mpz_t b
)
4330 if (a
== NULL
|| a
->expr_type
!= EXPR_CONSTANT
)
4333 if (a
->ts
.type
!= BT_INTEGER
)
4334 gfc_internal_error ("compare_bound_int(): Bad expression");
4336 i
= mpz_cmp (a
->value
.integer
, b
);
4346 /* Compute the last value of a sequence given by a triplet.
4347 Return 0 if it wasn't able to compute the last value, or if the
4348 sequence if empty, and 1 otherwise. */
4351 compute_last_value_for_triplet (gfc_expr
*start
, gfc_expr
*end
,
4352 gfc_expr
*stride
, mpz_t last
)
4356 if (start
== NULL
|| start
->expr_type
!= EXPR_CONSTANT
4357 || end
== NULL
|| end
->expr_type
!= EXPR_CONSTANT
4358 || (stride
!= NULL
&& stride
->expr_type
!= EXPR_CONSTANT
))
4361 if (start
->ts
.type
!= BT_INTEGER
|| end
->ts
.type
!= BT_INTEGER
4362 || (stride
!= NULL
&& stride
->ts
.type
!= BT_INTEGER
))
4365 if (stride
== NULL
|| compare_bound_int (stride
, 1) == CMP_EQ
)
4367 if (compare_bound (start
, end
) == CMP_GT
)
4369 mpz_set (last
, end
->value
.integer
);
4373 if (compare_bound_int (stride
, 0) == CMP_GT
)
4375 /* Stride is positive */
4376 if (mpz_cmp (start
->value
.integer
, end
->value
.integer
) > 0)
4381 /* Stride is negative */
4382 if (mpz_cmp (start
->value
.integer
, end
->value
.integer
) < 0)
4387 mpz_sub (rem
, end
->value
.integer
, start
->value
.integer
);
4388 mpz_tdiv_r (rem
, rem
, stride
->value
.integer
);
4389 mpz_sub (last
, end
->value
.integer
, rem
);
4396 /* Compare a single dimension of an array reference to the array
4400 check_dimension (int i
, gfc_array_ref
*ar
, gfc_array_spec
*as
)
4404 if (ar
->dimen_type
[i
] == DIMEN_STAR
)
4406 gcc_assert (ar
->stride
[i
] == NULL
);
4407 /* This implies [*] as [*:] and [*:3] are not possible. */
4408 if (ar
->start
[i
] == NULL
)
4410 gcc_assert (ar
->end
[i
] == NULL
);
4415 /* Given start, end and stride values, calculate the minimum and
4416 maximum referenced indexes. */
4418 switch (ar
->dimen_type
[i
])
4421 case DIMEN_THIS_IMAGE
:
4426 if (compare_bound (ar
->start
[i
], as
->lower
[i
]) == CMP_LT
)
4429 gfc_warning (0, "Array reference at %L is out of bounds "
4430 "(%ld < %ld) in dimension %d", &ar
->c_where
[i
],
4431 mpz_get_si (ar
->start
[i
]->value
.integer
),
4432 mpz_get_si (as
->lower
[i
]->value
.integer
), i
+1);
4434 gfc_warning (0, "Array reference at %L is out of bounds "
4435 "(%ld < %ld) in codimension %d", &ar
->c_where
[i
],
4436 mpz_get_si (ar
->start
[i
]->value
.integer
),
4437 mpz_get_si (as
->lower
[i
]->value
.integer
),
4441 if (compare_bound (ar
->start
[i
], as
->upper
[i
]) == CMP_GT
)
4444 gfc_warning (0, "Array reference at %L is out of bounds "
4445 "(%ld > %ld) in dimension %d", &ar
->c_where
[i
],
4446 mpz_get_si (ar
->start
[i
]->value
.integer
),
4447 mpz_get_si (as
->upper
[i
]->value
.integer
), i
+1);
4449 gfc_warning (0, "Array reference at %L is out of bounds "
4450 "(%ld > %ld) in codimension %d", &ar
->c_where
[i
],
4451 mpz_get_si (ar
->start
[i
]->value
.integer
),
4452 mpz_get_si (as
->upper
[i
]->value
.integer
),
4461 #define AR_START (ar->start[i] ? ar->start[i] : as->lower[i])
4462 #define AR_END (ar->end[i] ? ar->end[i] : as->upper[i])
4464 compare_result comp_start_end
= compare_bound (AR_START
, AR_END
);
4466 /* Check for zero stride, which is not allowed. */
4467 if (compare_bound_int (ar
->stride
[i
], 0) == CMP_EQ
)
4469 gfc_error ("Illegal stride of zero at %L", &ar
->c_where
[i
]);
4473 /* if start == len || (stride > 0 && start < len)
4474 || (stride < 0 && start > len),
4475 then the array section contains at least one element. In this
4476 case, there is an out-of-bounds access if
4477 (start < lower || start > upper). */
4478 if (compare_bound (AR_START
, AR_END
) == CMP_EQ
4479 || ((compare_bound_int (ar
->stride
[i
], 0) == CMP_GT
4480 || ar
->stride
[i
] == NULL
) && comp_start_end
== CMP_LT
)
4481 || (compare_bound_int (ar
->stride
[i
], 0) == CMP_LT
4482 && comp_start_end
== CMP_GT
))
4484 if (compare_bound (AR_START
, as
->lower
[i
]) == CMP_LT
)
4486 gfc_warning (0, "Lower array reference at %L is out of bounds "
4487 "(%ld < %ld) in dimension %d", &ar
->c_where
[i
],
4488 mpz_get_si (AR_START
->value
.integer
),
4489 mpz_get_si (as
->lower
[i
]->value
.integer
), i
+1);
4492 if (compare_bound (AR_START
, as
->upper
[i
]) == CMP_GT
)
4494 gfc_warning (0, "Lower array reference at %L is out of bounds "
4495 "(%ld > %ld) in dimension %d", &ar
->c_where
[i
],
4496 mpz_get_si (AR_START
->value
.integer
),
4497 mpz_get_si (as
->upper
[i
]->value
.integer
), i
+1);
4502 /* If we can compute the highest index of the array section,
4503 then it also has to be between lower and upper. */
4504 mpz_init (last_value
);
4505 if (compute_last_value_for_triplet (AR_START
, AR_END
, ar
->stride
[i
],
4508 if (compare_bound_mpz_t (as
->lower
[i
], last_value
) == CMP_GT
)
4510 gfc_warning (0, "Upper array reference at %L is out of bounds "
4511 "(%ld < %ld) in dimension %d", &ar
->c_where
[i
],
4512 mpz_get_si (last_value
),
4513 mpz_get_si (as
->lower
[i
]->value
.integer
), i
+1);
4514 mpz_clear (last_value
);
4517 if (compare_bound_mpz_t (as
->upper
[i
], last_value
) == CMP_LT
)
4519 gfc_warning (0, "Upper array reference at %L is out of bounds "
4520 "(%ld > %ld) in dimension %d", &ar
->c_where
[i
],
4521 mpz_get_si (last_value
),
4522 mpz_get_si (as
->upper
[i
]->value
.integer
), i
+1);
4523 mpz_clear (last_value
);
4527 mpz_clear (last_value
);
4535 gfc_internal_error ("check_dimension(): Bad array reference");
4542 /* Compare an array reference with an array specification. */
4545 compare_spec_to_ref (gfc_array_ref
*ar
)
4552 /* TODO: Full array sections are only allowed as actual parameters. */
4553 if (as
->type
== AS_ASSUMED_SIZE
4554 && (/*ar->type == AR_FULL
4555 ||*/ (ar
->type
== AR_SECTION
4556 && ar
->dimen_type
[i
] == DIMEN_RANGE
&& ar
->end
[i
] == NULL
)))
4558 gfc_error ("Rightmost upper bound of assumed size array section "
4559 "not specified at %L", &ar
->where
);
4563 if (ar
->type
== AR_FULL
)
4566 if (as
->rank
!= ar
->dimen
)
4568 gfc_error ("Rank mismatch in array reference at %L (%d/%d)",
4569 &ar
->where
, ar
->dimen
, as
->rank
);
4573 /* ar->codimen == 0 is a local array. */
4574 if (as
->corank
!= ar
->codimen
&& ar
->codimen
!= 0)
4576 gfc_error ("Coindex rank mismatch in array reference at %L (%d/%d)",
4577 &ar
->where
, ar
->codimen
, as
->corank
);
4581 for (i
= 0; i
< as
->rank
; i
++)
4582 if (!check_dimension (i
, ar
, as
))
4585 /* Local access has no coarray spec. */
4586 if (ar
->codimen
!= 0)
4587 for (i
= as
->rank
; i
< as
->rank
+ as
->corank
; i
++)
4589 if (ar
->dimen_type
[i
] != DIMEN_ELEMENT
&& !ar
->in_allocate
4590 && ar
->dimen_type
[i
] != DIMEN_THIS_IMAGE
)
4592 gfc_error ("Coindex of codimension %d must be a scalar at %L",
4593 i
+ 1 - as
->rank
, &ar
->where
);
4596 if (!check_dimension (i
, ar
, as
))
4604 /* Resolve one part of an array index. */
4607 gfc_resolve_index_1 (gfc_expr
*index
, int check_scalar
,
4608 int force_index_integer_kind
)
4615 if (!gfc_resolve_expr (index
))
4618 if (check_scalar
&& index
->rank
!= 0)
4620 gfc_error ("Array index at %L must be scalar", &index
->where
);
4624 if (index
->ts
.type
!= BT_INTEGER
&& index
->ts
.type
!= BT_REAL
)
4626 gfc_error ("Array index at %L must be of INTEGER type, found %s",
4627 &index
->where
, gfc_basic_typename (index
->ts
.type
));
4631 if (index
->ts
.type
== BT_REAL
)
4632 if (!gfc_notify_std (GFC_STD_LEGACY
, "REAL array index at %L",
4636 if ((index
->ts
.kind
!= gfc_index_integer_kind
4637 && force_index_integer_kind
)
4638 || index
->ts
.type
!= BT_INTEGER
)
4641 ts
.type
= BT_INTEGER
;
4642 ts
.kind
= gfc_index_integer_kind
;
4644 gfc_convert_type_warn (index
, &ts
, 2, 0);
4650 /* Resolve one part of an array index. */
4653 gfc_resolve_index (gfc_expr
*index
, int check_scalar
)
4655 return gfc_resolve_index_1 (index
, check_scalar
, 1);
4658 /* Resolve a dim argument to an intrinsic function. */
4661 gfc_resolve_dim_arg (gfc_expr
*dim
)
4666 if (!gfc_resolve_expr (dim
))
4671 gfc_error ("Argument dim at %L must be scalar", &dim
->where
);
4676 if (dim
->ts
.type
!= BT_INTEGER
)
4678 gfc_error ("Argument dim at %L must be of INTEGER type", &dim
->where
);
4682 if (dim
->ts
.kind
!= gfc_index_integer_kind
)
4687 ts
.type
= BT_INTEGER
;
4688 ts
.kind
= gfc_index_integer_kind
;
4690 gfc_convert_type_warn (dim
, &ts
, 2, 0);
4696 /* Given an expression that contains array references, update those array
4697 references to point to the right array specifications. While this is
4698 filled in during matching, this information is difficult to save and load
4699 in a module, so we take care of it here.
4701 The idea here is that the original array reference comes from the
4702 base symbol. We traverse the list of reference structures, setting
4703 the stored reference to references. Component references can
4704 provide an additional array specification. */
4707 find_array_spec (gfc_expr
*e
)
4713 if (e
->symtree
->n
.sym
->ts
.type
== BT_CLASS
)
4714 as
= CLASS_DATA (e
->symtree
->n
.sym
)->as
;
4716 as
= e
->symtree
->n
.sym
->as
;
4718 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
4723 gfc_internal_error ("find_array_spec(): Missing spec");
4730 c
= ref
->u
.c
.component
;
4731 if (c
->attr
.dimension
)
4734 gfc_internal_error ("find_array_spec(): unused as(1)");
4746 gfc_internal_error ("find_array_spec(): unused as(2)");
4750 /* Resolve an array reference. */
4753 resolve_array_ref (gfc_array_ref
*ar
)
4755 int i
, check_scalar
;
4758 for (i
= 0; i
< ar
->dimen
+ ar
->codimen
; i
++)
4760 check_scalar
= ar
->dimen_type
[i
] == DIMEN_RANGE
;
4762 /* Do not force gfc_index_integer_kind for the start. We can
4763 do fine with any integer kind. This avoids temporary arrays
4764 created for indexing with a vector. */
4765 if (!gfc_resolve_index_1 (ar
->start
[i
], check_scalar
, 0))
4767 if (!gfc_resolve_index (ar
->end
[i
], check_scalar
))
4769 if (!gfc_resolve_index (ar
->stride
[i
], check_scalar
))
4774 if (ar
->dimen_type
[i
] == DIMEN_UNKNOWN
)
4778 ar
->dimen_type
[i
] = DIMEN_ELEMENT
;
4782 ar
->dimen_type
[i
] = DIMEN_VECTOR
;
4783 if (e
->expr_type
== EXPR_VARIABLE
4784 && e
->symtree
->n
.sym
->ts
.type
== BT_DERIVED
)
4785 ar
->start
[i
] = gfc_get_parentheses (e
);
4789 gfc_error ("Array index at %L is an array of rank %d",
4790 &ar
->c_where
[i
], e
->rank
);
4794 /* Fill in the upper bound, which may be lower than the
4795 specified one for something like a(2:10:5), which is
4796 identical to a(2:7:5). Only relevant for strides not equal
4797 to one. Don't try a division by zero. */
4798 if (ar
->dimen_type
[i
] == DIMEN_RANGE
4799 && ar
->stride
[i
] != NULL
&& ar
->stride
[i
]->expr_type
== EXPR_CONSTANT
4800 && mpz_cmp_si (ar
->stride
[i
]->value
.integer
, 1L) != 0
4801 && mpz_cmp_si (ar
->stride
[i
]->value
.integer
, 0L) != 0)
4805 if (gfc_ref_dimen_size (ar
, i
, &size
, &end
))
4807 if (ar
->end
[i
] == NULL
)
4810 gfc_get_constant_expr (BT_INTEGER
, gfc_index_integer_kind
,
4812 mpz_set (ar
->end
[i
]->value
.integer
, end
);
4814 else if (ar
->end
[i
]->ts
.type
== BT_INTEGER
4815 && ar
->end
[i
]->expr_type
== EXPR_CONSTANT
)
4817 mpz_set (ar
->end
[i
]->value
.integer
, end
);
4828 if (ar
->type
== AR_FULL
)
4830 if (ar
->as
->rank
== 0)
4831 ar
->type
= AR_ELEMENT
;
4833 /* Make sure array is the same as array(:,:), this way
4834 we don't need to special case all the time. */
4835 ar
->dimen
= ar
->as
->rank
;
4836 for (i
= 0; i
< ar
->dimen
; i
++)
4838 ar
->dimen_type
[i
] = DIMEN_RANGE
;
4840 gcc_assert (ar
->start
[i
] == NULL
);
4841 gcc_assert (ar
->end
[i
] == NULL
);
4842 gcc_assert (ar
->stride
[i
] == NULL
);
4846 /* If the reference type is unknown, figure out what kind it is. */
4848 if (ar
->type
== AR_UNKNOWN
)
4850 ar
->type
= AR_ELEMENT
;
4851 for (i
= 0; i
< ar
->dimen
; i
++)
4852 if (ar
->dimen_type
[i
] == DIMEN_RANGE
4853 || ar
->dimen_type
[i
] == DIMEN_VECTOR
)
4855 ar
->type
= AR_SECTION
;
4860 if (!ar
->as
->cray_pointee
&& !compare_spec_to_ref (ar
))
4863 if (ar
->as
->corank
&& ar
->codimen
== 0)
4866 ar
->codimen
= ar
->as
->corank
;
4867 for (n
= ar
->dimen
; n
< ar
->dimen
+ ar
->codimen
; n
++)
4868 ar
->dimen_type
[n
] = DIMEN_THIS_IMAGE
;
4876 resolve_substring (gfc_ref
*ref
)
4878 int k
= gfc_validate_kind (BT_INTEGER
, gfc_charlen_int_kind
, false);
4880 if (ref
->u
.ss
.start
!= NULL
)
4882 if (!gfc_resolve_expr (ref
->u
.ss
.start
))
4885 if (ref
->u
.ss
.start
->ts
.type
!= BT_INTEGER
)
4887 gfc_error ("Substring start index at %L must be of type INTEGER",
4888 &ref
->u
.ss
.start
->where
);
4892 if (ref
->u
.ss
.start
->rank
!= 0)
4894 gfc_error ("Substring start index at %L must be scalar",
4895 &ref
->u
.ss
.start
->where
);
4899 if (compare_bound_int (ref
->u
.ss
.start
, 1) == CMP_LT
4900 && (compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_EQ
4901 || compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_GT
))
4903 gfc_error ("Substring start index at %L is less than one",
4904 &ref
->u
.ss
.start
->where
);
4909 if (ref
->u
.ss
.end
!= NULL
)
4911 if (!gfc_resolve_expr (ref
->u
.ss
.end
))
4914 if (ref
->u
.ss
.end
->ts
.type
!= BT_INTEGER
)
4916 gfc_error ("Substring end index at %L must be of type INTEGER",
4917 &ref
->u
.ss
.end
->where
);
4921 if (ref
->u
.ss
.end
->rank
!= 0)
4923 gfc_error ("Substring end index at %L must be scalar",
4924 &ref
->u
.ss
.end
->where
);
4928 if (ref
->u
.ss
.length
!= NULL
4929 && compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.length
->length
) == CMP_GT
4930 && (compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_EQ
4931 || compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_GT
))
4933 gfc_error ("Substring end index at %L exceeds the string length",
4934 &ref
->u
.ss
.start
->where
);
4938 if (compare_bound_mpz_t (ref
->u
.ss
.end
,
4939 gfc_integer_kinds
[k
].huge
) == CMP_GT
4940 && (compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_EQ
4941 || compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_GT
))
4943 gfc_error ("Substring end index at %L is too large",
4944 &ref
->u
.ss
.end
->where
);
4953 /* This function supplies missing substring charlens. */
4956 gfc_resolve_substring_charlen (gfc_expr
*e
)
4959 gfc_expr
*start
, *end
;
4960 gfc_typespec
*ts
= NULL
;
4962 for (char_ref
= e
->ref
; char_ref
; char_ref
= char_ref
->next
)
4964 if (char_ref
->type
== REF_SUBSTRING
|| char_ref
->type
== REF_INQUIRY
)
4966 if (char_ref
->type
== REF_COMPONENT
)
4967 ts
= &char_ref
->u
.c
.component
->ts
;
4970 if (!char_ref
|| char_ref
->type
== REF_INQUIRY
)
4973 gcc_assert (char_ref
->next
== NULL
);
4977 if (e
->ts
.u
.cl
->length
)
4978 gfc_free_expr (e
->ts
.u
.cl
->length
);
4979 else if (e
->expr_type
== EXPR_VARIABLE
&& e
->symtree
->n
.sym
->attr
.dummy
)
4983 e
->ts
.type
= BT_CHARACTER
;
4984 e
->ts
.kind
= gfc_default_character_kind
;
4987 e
->ts
.u
.cl
= gfc_new_charlen (gfc_current_ns
, NULL
);
4989 if (char_ref
->u
.ss
.start
)
4990 start
= gfc_copy_expr (char_ref
->u
.ss
.start
);
4992 start
= gfc_get_int_expr (gfc_charlen_int_kind
, NULL
, 1);
4994 if (char_ref
->u
.ss
.end
)
4995 end
= gfc_copy_expr (char_ref
->u
.ss
.end
);
4996 else if (e
->expr_type
== EXPR_VARIABLE
)
4999 ts
= &e
->symtree
->n
.sym
->ts
;
5000 end
= gfc_copy_expr (ts
->u
.cl
->length
);
5007 gfc_free_expr (start
);
5008 gfc_free_expr (end
);
5012 /* Length = (end - start + 1). */
5013 e
->ts
.u
.cl
->length
= gfc_subtract (end
, start
);
5014 e
->ts
.u
.cl
->length
= gfc_add (e
->ts
.u
.cl
->length
,
5015 gfc_get_int_expr (gfc_charlen_int_kind
,
5018 /* F2008, 6.4.1: Both the starting point and the ending point shall
5019 be within the range 1, 2, ..., n unless the starting point exceeds
5020 the ending point, in which case the substring has length zero. */
5022 if (mpz_cmp_si (e
->ts
.u
.cl
->length
->value
.integer
, 0) < 0)
5023 mpz_set_si (e
->ts
.u
.cl
->length
->value
.integer
, 0);
5025 e
->ts
.u
.cl
->length
->ts
.type
= BT_INTEGER
;
5026 e
->ts
.u
.cl
->length
->ts
.kind
= gfc_charlen_int_kind
;
5028 /* Make sure that the length is simplified. */
5029 gfc_simplify_expr (e
->ts
.u
.cl
->length
, 1);
5030 gfc_resolve_expr (e
->ts
.u
.cl
->length
);
5034 /* Resolve subtype references. */
5037 resolve_ref (gfc_expr
*expr
)
5039 int current_part_dimension
, n_components
, seen_part_dimension
;
5042 for (ref
= expr
->ref
; ref
; ref
= ref
->next
)
5043 if (ref
->type
== REF_ARRAY
&& ref
->u
.ar
.as
== NULL
)
5045 find_array_spec (expr
);
5049 for (ref
= expr
->ref
; ref
; ref
= ref
->next
)
5053 if (!resolve_array_ref (&ref
->u
.ar
))
5062 if (!resolve_substring (ref
))
5067 /* Check constraints on part references. */
5069 current_part_dimension
= 0;
5070 seen_part_dimension
= 0;
5073 for (ref
= expr
->ref
; ref
; ref
= ref
->next
)
5078 switch (ref
->u
.ar
.type
)
5081 /* Coarray scalar. */
5082 if (ref
->u
.ar
.as
->rank
== 0)
5084 current_part_dimension
= 0;
5089 current_part_dimension
= 1;
5093 current_part_dimension
= 0;
5097 gfc_internal_error ("resolve_ref(): Bad array reference");
5103 if (current_part_dimension
|| seen_part_dimension
)
5106 if (ref
->u
.c
.component
->attr
.pointer
5107 || ref
->u
.c
.component
->attr
.proc_pointer
5108 || (ref
->u
.c
.component
->ts
.type
== BT_CLASS
5109 && CLASS_DATA (ref
->u
.c
.component
)->attr
.pointer
))
5111 gfc_error ("Component to the right of a part reference "
5112 "with nonzero rank must not have the POINTER "
5113 "attribute at %L", &expr
->where
);
5116 else if (ref
->u
.c
.component
->attr
.allocatable
5117 || (ref
->u
.c
.component
->ts
.type
== BT_CLASS
5118 && CLASS_DATA (ref
->u
.c
.component
)->attr
.allocatable
))
5121 gfc_error ("Component to the right of a part reference "
5122 "with nonzero rank must not have the ALLOCATABLE "
5123 "attribute at %L", &expr
->where
);
5136 if (((ref
->type
== REF_COMPONENT
&& n_components
> 1)
5137 || ref
->next
== NULL
)
5138 && current_part_dimension
5139 && seen_part_dimension
)
5141 gfc_error ("Two or more part references with nonzero rank must "
5142 "not be specified at %L", &expr
->where
);
5146 if (ref
->type
== REF_COMPONENT
)
5148 if (current_part_dimension
)
5149 seen_part_dimension
= 1;
5151 /* reset to make sure */
5152 current_part_dimension
= 0;
5160 /* Given an expression, determine its shape. This is easier than it sounds.
5161 Leaves the shape array NULL if it is not possible to determine the shape. */
5164 expression_shape (gfc_expr
*e
)
5166 mpz_t array
[GFC_MAX_DIMENSIONS
];
5169 if (e
->rank
<= 0 || e
->shape
!= NULL
)
5172 for (i
= 0; i
< e
->rank
; i
++)
5173 if (!gfc_array_dimen_size (e
, i
, &array
[i
]))
5176 e
->shape
= gfc_get_shape (e
->rank
);
5178 memcpy (e
->shape
, array
, e
->rank
* sizeof (mpz_t
));
5183 for (i
--; i
>= 0; i
--)
5184 mpz_clear (array
[i
]);
5188 /* Given a variable expression node, compute the rank of the expression by
5189 examining the base symbol and any reference structures it may have. */
5192 expression_rank (gfc_expr
*e
)
5197 /* Just to make sure, because EXPR_COMPCALL's also have an e->ref and that
5198 could lead to serious confusion... */
5199 gcc_assert (e
->expr_type
!= EXPR_COMPCALL
);
5203 if (e
->expr_type
== EXPR_ARRAY
)
5205 /* Constructors can have a rank different from one via RESHAPE(). */
5207 if (e
->symtree
== NULL
)
5213 e
->rank
= (e
->symtree
->n
.sym
->as
== NULL
)
5214 ? 0 : e
->symtree
->n
.sym
->as
->rank
;
5220 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
5222 if (ref
->type
== REF_COMPONENT
&& ref
->u
.c
.component
->attr
.proc_pointer
5223 && ref
->u
.c
.component
->attr
.function
&& !ref
->next
)
5224 rank
= ref
->u
.c
.component
->as
? ref
->u
.c
.component
->as
->rank
: 0;
5226 if (ref
->type
!= REF_ARRAY
)
5229 if (ref
->u
.ar
.type
== AR_FULL
)
5231 rank
= ref
->u
.ar
.as
->rank
;
5235 if (ref
->u
.ar
.type
== AR_SECTION
)
5237 /* Figure out the rank of the section. */
5239 gfc_internal_error ("expression_rank(): Two array specs");
5241 for (i
= 0; i
< ref
->u
.ar
.dimen
; i
++)
5242 if (ref
->u
.ar
.dimen_type
[i
] == DIMEN_RANGE
5243 || ref
->u
.ar
.dimen_type
[i
] == DIMEN_VECTOR
)
5253 expression_shape (e
);
5258 add_caf_get_intrinsic (gfc_expr
*e
)
5260 gfc_expr
*wrapper
, *tmp_expr
;
5264 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
5265 if (ref
->type
== REF_ARRAY
&& ref
->u
.ar
.codimen
> 0)
5270 for (n
= ref
->u
.ar
.dimen
; n
< ref
->u
.ar
.dimen
+ ref
->u
.ar
.codimen
; n
++)
5271 if (ref
->u
.ar
.dimen_type
[n
] != DIMEN_ELEMENT
)
5274 tmp_expr
= XCNEW (gfc_expr
);
5276 wrapper
= gfc_build_intrinsic_call (gfc_current_ns
, GFC_ISYM_CAF_GET
,
5277 "caf_get", tmp_expr
->where
, 1, tmp_expr
);
5278 wrapper
->ts
= e
->ts
;
5279 wrapper
->rank
= e
->rank
;
5281 wrapper
->shape
= gfc_copy_shape (e
->shape
, e
->rank
);
5288 remove_caf_get_intrinsic (gfc_expr
*e
)
5290 gcc_assert (e
->expr_type
== EXPR_FUNCTION
&& e
->value
.function
.isym
5291 && e
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
);
5292 gfc_expr
*e2
= e
->value
.function
.actual
->expr
;
5293 e
->value
.function
.actual
->expr
= NULL
;
5294 gfc_free_actual_arglist (e
->value
.function
.actual
);
5295 gfc_free_shape (&e
->shape
, e
->rank
);
5301 /* Resolve a variable expression. */
5304 resolve_variable (gfc_expr
*e
)
5311 if (e
->symtree
== NULL
)
5313 sym
= e
->symtree
->n
.sym
;
5315 /* Use same check as for TYPE(*) below; this check has to be before TYPE(*)
5316 as ts.type is set to BT_ASSUMED in resolve_symbol. */
5317 if (sym
->attr
.ext_attr
& (1 << EXT_ATTR_NO_ARG_CHECK
))
5319 if (!actual_arg
|| inquiry_argument
)
5321 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute may only "
5322 "be used as actual argument", sym
->name
, &e
->where
);
5326 /* TS 29113, 407b. */
5327 else if (e
->ts
.type
== BT_ASSUMED
)
5331 gfc_error ("Assumed-type variable %s at %L may only be used "
5332 "as actual argument", sym
->name
, &e
->where
);
5335 else if (inquiry_argument
&& !first_actual_arg
)
5337 /* FIXME: It doesn't work reliably as inquiry_argument is not set
5338 for all inquiry functions in resolve_function; the reason is
5339 that the function-name resolution happens too late in that
5341 gfc_error ("Assumed-type variable %s at %L as actual argument to "
5342 "an inquiry function shall be the first argument",
5343 sym
->name
, &e
->where
);
5347 /* TS 29113, C535b. */
5348 else if ((sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
5349 && CLASS_DATA (sym
)->as
5350 && CLASS_DATA (sym
)->as
->type
== AS_ASSUMED_RANK
)
5351 || (sym
->ts
.type
!= BT_CLASS
&& sym
->as
5352 && sym
->as
->type
== AS_ASSUMED_RANK
))
5356 gfc_error ("Assumed-rank variable %s at %L may only be used as "
5357 "actual argument", sym
->name
, &e
->where
);
5360 else if (inquiry_argument
&& !first_actual_arg
)
5362 /* FIXME: It doesn't work reliably as inquiry_argument is not set
5363 for all inquiry functions in resolve_function; the reason is
5364 that the function-name resolution happens too late in that
5366 gfc_error ("Assumed-rank variable %s at %L as actual argument "
5367 "to an inquiry function shall be the first argument",
5368 sym
->name
, &e
->where
);
5373 if ((sym
->attr
.ext_attr
& (1 << EXT_ATTR_NO_ARG_CHECK
)) && e
->ref
5374 && !(e
->ref
->type
== REF_ARRAY
&& e
->ref
->u
.ar
.type
== AR_FULL
5375 && e
->ref
->next
== NULL
))
5377 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute shall not have "
5378 "a subobject reference", sym
->name
, &e
->ref
->u
.ar
.where
);
5381 /* TS 29113, 407b. */
5382 else if (e
->ts
.type
== BT_ASSUMED
&& e
->ref
5383 && !(e
->ref
->type
== REF_ARRAY
&& e
->ref
->u
.ar
.type
== AR_FULL
5384 && e
->ref
->next
== NULL
))
5386 gfc_error ("Assumed-type variable %s at %L shall not have a subobject "
5387 "reference", sym
->name
, &e
->ref
->u
.ar
.where
);
5391 /* TS 29113, C535b. */
5392 if (((sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
5393 && CLASS_DATA (sym
)->as
5394 && CLASS_DATA (sym
)->as
->type
== AS_ASSUMED_RANK
)
5395 || (sym
->ts
.type
!= BT_CLASS
&& sym
->as
5396 && sym
->as
->type
== AS_ASSUMED_RANK
))
5398 && !(e
->ref
->type
== REF_ARRAY
&& e
->ref
->u
.ar
.type
== AR_FULL
5399 && e
->ref
->next
== NULL
))
5401 gfc_error ("Assumed-rank variable %s at %L shall not have a subobject "
5402 "reference", sym
->name
, &e
->ref
->u
.ar
.where
);
5406 /* For variables that are used in an associate (target => object) where
5407 the object's basetype is array valued while the target is scalar,
5408 the ts' type of the component refs is still array valued, which
5409 can't be translated that way. */
5410 if (sym
->assoc
&& e
->rank
== 0 && e
->ref
&& sym
->ts
.type
== BT_CLASS
5411 && sym
->assoc
->target
&& sym
->assoc
->target
->ts
.type
== BT_CLASS
5412 && CLASS_DATA (sym
->assoc
->target
)->as
)
5414 gfc_ref
*ref
= e
->ref
;
5420 ref
->u
.c
.sym
= sym
->ts
.u
.derived
;
5421 /* Stop the loop. */
5431 /* If this is an associate-name, it may be parsed with an array reference
5432 in error even though the target is scalar. Fail directly in this case.
5433 TODO Understand why class scalar expressions must be excluded. */
5434 if (sym
->assoc
&& !(sym
->ts
.type
== BT_CLASS
&& e
->rank
== 0))
5436 if (sym
->ts
.type
== BT_CLASS
)
5437 gfc_fix_class_refs (e
);
5438 if (!sym
->attr
.dimension
&& e
->ref
&& e
->ref
->type
== REF_ARRAY
)
5440 else if (sym
->attr
.dimension
&& (!e
->ref
|| e
->ref
->type
!= REF_ARRAY
))
5442 /* This can happen because the parser did not detect that the
5443 associate name is an array and the expression had no array
5445 gfc_ref
*ref
= gfc_get_ref ();
5446 ref
->type
= REF_ARRAY
;
5447 ref
->u
.ar
= *gfc_get_array_ref();
5448 ref
->u
.ar
.type
= AR_FULL
;
5451 ref
->u
.ar
.as
= sym
->as
;
5452 ref
->u
.ar
.dimen
= sym
->as
->rank
;
5460 if (sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
->attr
.generic
)
5461 sym
->ts
.u
.derived
= gfc_find_dt_in_generic (sym
->ts
.u
.derived
);
5463 /* On the other hand, the parser may not have known this is an array;
5464 in this case, we have to add a FULL reference. */
5465 if (sym
->assoc
&& sym
->attr
.dimension
&& !e
->ref
)
5467 e
->ref
= gfc_get_ref ();
5468 e
->ref
->type
= REF_ARRAY
;
5469 e
->ref
->u
.ar
.type
= AR_FULL
;
5470 e
->ref
->u
.ar
.dimen
= 0;
5473 /* Like above, but for class types, where the checking whether an array
5474 ref is present is more complicated. Furthermore make sure not to add
5475 the full array ref to _vptr or _len refs. */
5476 if (sym
->assoc
&& sym
->ts
.type
== BT_CLASS
5477 && CLASS_DATA (sym
)->attr
.dimension
5478 && (e
->ts
.type
!= BT_DERIVED
|| !e
->ts
.u
.derived
->attr
.vtype
))
5480 gfc_ref
*ref
, *newref
;
5482 newref
= gfc_get_ref ();
5483 newref
->type
= REF_ARRAY
;
5484 newref
->u
.ar
.type
= AR_FULL
;
5485 newref
->u
.ar
.dimen
= 0;
5486 /* Because this is an associate var and the first ref either is a ref to
5487 the _data component or not, no traversal of the ref chain is
5488 needed. The array ref needs to be inserted after the _data ref,
5489 or when that is not present, which may happend for polymorphic
5490 types, then at the first position. */
5494 else if (ref
->type
== REF_COMPONENT
5495 && strcmp ("_data", ref
->u
.c
.component
->name
) == 0)
5497 if (!ref
->next
|| ref
->next
->type
!= REF_ARRAY
)
5499 newref
->next
= ref
->next
;
5503 /* Array ref present already. */
5504 gfc_free_ref_list (newref
);
5506 else if (ref
->type
== REF_ARRAY
)
5507 /* Array ref present already. */
5508 gfc_free_ref_list (newref
);
5516 if (e
->ref
&& !resolve_ref (e
))
5519 if (sym
->attr
.flavor
== FL_PROCEDURE
5520 && (!sym
->attr
.function
5521 || (sym
->attr
.function
&& sym
->result
5522 && sym
->result
->attr
.proc_pointer
5523 && !sym
->result
->attr
.function
)))
5525 e
->ts
.type
= BT_PROCEDURE
;
5526 goto resolve_procedure
;
5529 if (sym
->ts
.type
!= BT_UNKNOWN
)
5530 gfc_variable_attr (e
, &e
->ts
);
5531 else if (sym
->attr
.flavor
== FL_PROCEDURE
5532 && sym
->attr
.function
&& sym
->result
5533 && sym
->result
->ts
.type
!= BT_UNKNOWN
5534 && sym
->result
->attr
.proc_pointer
)
5535 e
->ts
= sym
->result
->ts
;
5538 /* Must be a simple variable reference. */
5539 if (!gfc_set_default_type (sym
, 1, sym
->ns
))
5544 if (check_assumed_size_reference (sym
, e
))
5547 /* Deal with forward references to entries during gfc_resolve_code, to
5548 satisfy, at least partially, 12.5.2.5. */
5549 if (gfc_current_ns
->entries
5550 && current_entry_id
== sym
->entry_id
5553 && cs_base
->current
->op
!= EXEC_ENTRY
)
5555 gfc_entry_list
*entry
;
5556 gfc_formal_arglist
*formal
;
5558 bool seen
, saved_specification_expr
;
5560 /* If the symbol is a dummy... */
5561 if (sym
->attr
.dummy
&& sym
->ns
== gfc_current_ns
)
5563 entry
= gfc_current_ns
->entries
;
5566 /* ...test if the symbol is a parameter of previous entries. */
5567 for (; entry
&& entry
->id
<= current_entry_id
; entry
= entry
->next
)
5568 for (formal
= entry
->sym
->formal
; formal
; formal
= formal
->next
)
5570 if (formal
->sym
&& sym
->name
== formal
->sym
->name
)
5577 /* If it has not been seen as a dummy, this is an error. */
5580 if (specification_expr
)
5581 gfc_error ("Variable %qs, used in a specification expression"
5582 ", is referenced at %L before the ENTRY statement "
5583 "in which it is a parameter",
5584 sym
->name
, &cs_base
->current
->loc
);
5586 gfc_error ("Variable %qs is used at %L before the ENTRY "
5587 "statement in which it is a parameter",
5588 sym
->name
, &cs_base
->current
->loc
);
5593 /* Now do the same check on the specification expressions. */
5594 saved_specification_expr
= specification_expr
;
5595 specification_expr
= true;
5596 if (sym
->ts
.type
== BT_CHARACTER
5597 && !gfc_resolve_expr (sym
->ts
.u
.cl
->length
))
5601 for (n
= 0; n
< sym
->as
->rank
; n
++)
5603 if (!gfc_resolve_expr (sym
->as
->lower
[n
]))
5605 if (!gfc_resolve_expr (sym
->as
->upper
[n
]))
5608 specification_expr
= saved_specification_expr
;
5611 /* Update the symbol's entry level. */
5612 sym
->entry_id
= current_entry_id
+ 1;
5615 /* If a symbol has been host_associated mark it. This is used latter,
5616 to identify if aliasing is possible via host association. */
5617 if (sym
->attr
.flavor
== FL_VARIABLE
5618 && gfc_current_ns
->parent
5619 && (gfc_current_ns
->parent
== sym
->ns
5620 || (gfc_current_ns
->parent
->parent
5621 && gfc_current_ns
->parent
->parent
== sym
->ns
)))
5622 sym
->attr
.host_assoc
= 1;
5624 if (gfc_current_ns
->proc_name
5625 && sym
->attr
.dimension
5626 && (sym
->ns
!= gfc_current_ns
5627 || sym
->attr
.use_assoc
5628 || sym
->attr
.in_common
))
5629 gfc_current_ns
->proc_name
->attr
.array_outer_dependency
= 1;
5632 if (t
&& !resolve_procedure_expression (e
))
5635 /* F2008, C617 and C1229. */
5636 if (!inquiry_argument
&& (e
->ts
.type
== BT_CLASS
|| e
->ts
.type
== BT_DERIVED
)
5637 && gfc_is_coindexed (e
))
5639 gfc_ref
*ref
, *ref2
= NULL
;
5641 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
5643 if (ref
->type
== REF_COMPONENT
)
5645 if (ref
->type
== REF_ARRAY
&& ref
->u
.ar
.codimen
> 0)
5649 for ( ; ref
; ref
= ref
->next
)
5650 if (ref
->type
== REF_COMPONENT
)
5653 /* Expression itself is not coindexed object. */
5654 if (ref
&& e
->ts
.type
== BT_CLASS
)
5656 gfc_error ("Polymorphic subobject of coindexed object at %L",
5661 /* Expression itself is coindexed object. */
5665 c
= ref2
? ref2
->u
.c
.component
: e
->symtree
->n
.sym
->components
;
5666 for ( ; c
; c
= c
->next
)
5667 if (c
->attr
.allocatable
&& c
->ts
.type
== BT_CLASS
)
5669 gfc_error ("Coindexed object with polymorphic allocatable "
5670 "subcomponent at %L", &e
->where
);
5678 expression_rank (e
);
5680 if (t
&& flag_coarray
== GFC_FCOARRAY_LIB
&& gfc_is_coindexed (e
))
5681 add_caf_get_intrinsic (e
);
5683 /* Simplify cases where access to a parameter array results in a
5684 single constant. Suppress errors since those will have been
5685 issued before, as warnings. */
5686 if (e
->rank
== 0 && sym
->as
&& sym
->attr
.flavor
== FL_PARAMETER
)
5688 gfc_push_suppress_errors ();
5689 gfc_simplify_expr (e
, 1);
5690 gfc_pop_suppress_errors ();
5697 /* Checks to see that the correct symbol has been host associated.
5698 The only situation where this arises is that in which a twice
5699 contained function is parsed after the host association is made.
5700 Therefore, on detecting this, change the symbol in the expression
5701 and convert the array reference into an actual arglist if the old
5702 symbol is a variable. */
5704 check_host_association (gfc_expr
*e
)
5706 gfc_symbol
*sym
, *old_sym
;
5710 gfc_actual_arglist
*arg
, *tail
= NULL
;
5711 bool retval
= e
->expr_type
== EXPR_FUNCTION
;
5713 /* If the expression is the result of substitution in
5714 interface.c(gfc_extend_expr) because there is no way in
5715 which the host association can be wrong. */
5716 if (e
->symtree
== NULL
5717 || e
->symtree
->n
.sym
== NULL
5718 || e
->user_operator
)
5721 old_sym
= e
->symtree
->n
.sym
;
5723 if (gfc_current_ns
->parent
5724 && old_sym
->ns
!= gfc_current_ns
)
5726 /* Use the 'USE' name so that renamed module symbols are
5727 correctly handled. */
5728 gfc_find_symbol (e
->symtree
->name
, gfc_current_ns
, 1, &sym
);
5730 if (sym
&& old_sym
!= sym
5731 && sym
->ts
.type
== old_sym
->ts
.type
5732 && sym
->attr
.flavor
== FL_PROCEDURE
5733 && sym
->attr
.contained
)
5735 /* Clear the shape, since it might not be valid. */
5736 gfc_free_shape (&e
->shape
, e
->rank
);
5738 /* Give the expression the right symtree! */
5739 gfc_find_sym_tree (e
->symtree
->name
, NULL
, 1, &st
);
5740 gcc_assert (st
!= NULL
);
5742 if (old_sym
->attr
.flavor
== FL_PROCEDURE
5743 || e
->expr_type
== EXPR_FUNCTION
)
5745 /* Original was function so point to the new symbol, since
5746 the actual argument list is already attached to the
5748 e
->value
.function
.esym
= NULL
;
5753 /* Original was variable so convert array references into
5754 an actual arglist. This does not need any checking now
5755 since resolve_function will take care of it. */
5756 e
->value
.function
.actual
= NULL
;
5757 e
->expr_type
= EXPR_FUNCTION
;
5760 /* Ambiguity will not arise if the array reference is not
5761 the last reference. */
5762 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
5763 if (ref
->type
== REF_ARRAY
&& ref
->next
== NULL
)
5766 gcc_assert (ref
->type
== REF_ARRAY
);
5768 /* Grab the start expressions from the array ref and
5769 copy them into actual arguments. */
5770 for (n
= 0; n
< ref
->u
.ar
.dimen
; n
++)
5772 arg
= gfc_get_actual_arglist ();
5773 arg
->expr
= gfc_copy_expr (ref
->u
.ar
.start
[n
]);
5774 if (e
->value
.function
.actual
== NULL
)
5775 tail
= e
->value
.function
.actual
= arg
;
5783 /* Dump the reference list and set the rank. */
5784 gfc_free_ref_list (e
->ref
);
5786 e
->rank
= sym
->as
? sym
->as
->rank
: 0;
5789 gfc_resolve_expr (e
);
5793 /* This might have changed! */
5794 return e
->expr_type
== EXPR_FUNCTION
;
5799 gfc_resolve_character_operator (gfc_expr
*e
)
5801 gfc_expr
*op1
= e
->value
.op
.op1
;
5802 gfc_expr
*op2
= e
->value
.op
.op2
;
5803 gfc_expr
*e1
= NULL
;
5804 gfc_expr
*e2
= NULL
;
5806 gcc_assert (e
->value
.op
.op
== INTRINSIC_CONCAT
);
5808 if (op1
->ts
.u
.cl
&& op1
->ts
.u
.cl
->length
)
5809 e1
= gfc_copy_expr (op1
->ts
.u
.cl
->length
);
5810 else if (op1
->expr_type
== EXPR_CONSTANT
)
5811 e1
= gfc_get_int_expr (gfc_charlen_int_kind
, NULL
,
5812 op1
->value
.character
.length
);
5814 if (op2
->ts
.u
.cl
&& op2
->ts
.u
.cl
->length
)
5815 e2
= gfc_copy_expr (op2
->ts
.u
.cl
->length
);
5816 else if (op2
->expr_type
== EXPR_CONSTANT
)
5817 e2
= gfc_get_int_expr (gfc_charlen_int_kind
, NULL
,
5818 op2
->value
.character
.length
);
5820 e
->ts
.u
.cl
= gfc_new_charlen (gfc_current_ns
, NULL
);
5830 e
->ts
.u
.cl
->length
= gfc_add (e1
, e2
);
5831 e
->ts
.u
.cl
->length
->ts
.type
= BT_INTEGER
;
5832 e
->ts
.u
.cl
->length
->ts
.kind
= gfc_charlen_int_kind
;
5833 gfc_simplify_expr (e
->ts
.u
.cl
->length
, 0);
5834 gfc_resolve_expr (e
->ts
.u
.cl
->length
);
5840 /* Ensure that an character expression has a charlen and, if possible, a
5841 length expression. */
5844 fixup_charlen (gfc_expr
*e
)
5846 /* The cases fall through so that changes in expression type and the need
5847 for multiple fixes are picked up. In all circumstances, a charlen should
5848 be available for the middle end to hang a backend_decl on. */
5849 switch (e
->expr_type
)
5852 gfc_resolve_character_operator (e
);
5856 if (e
->expr_type
== EXPR_ARRAY
)
5857 gfc_resolve_character_array_constructor (e
);
5860 case EXPR_SUBSTRING
:
5861 if (!e
->ts
.u
.cl
&& e
->ref
)
5862 gfc_resolve_substring_charlen (e
);
5867 e
->ts
.u
.cl
= gfc_new_charlen (gfc_current_ns
, NULL
);
5874 /* Update an actual argument to include the passed-object for type-bound
5875 procedures at the right position. */
5877 static gfc_actual_arglist
*
5878 update_arglist_pass (gfc_actual_arglist
* lst
, gfc_expr
* po
, unsigned argpos
,
5881 gcc_assert (argpos
> 0);
5885 gfc_actual_arglist
* result
;
5887 result
= gfc_get_actual_arglist ();
5891 result
->name
= name
;
5897 lst
->next
= update_arglist_pass (lst
->next
, po
, argpos
- 1, name
);
5899 lst
= update_arglist_pass (NULL
, po
, argpos
- 1, name
);
5904 /* Extract the passed-object from an EXPR_COMPCALL (a copy of it). */
5907 extract_compcall_passed_object (gfc_expr
* e
)
5911 gcc_assert (e
->expr_type
== EXPR_COMPCALL
);
5913 if (e
->value
.compcall
.base_object
)
5914 po
= gfc_copy_expr (e
->value
.compcall
.base_object
);
5917 po
= gfc_get_expr ();
5918 po
->expr_type
= EXPR_VARIABLE
;
5919 po
->symtree
= e
->symtree
;
5920 po
->ref
= gfc_copy_ref (e
->ref
);
5921 po
->where
= e
->where
;
5924 if (!gfc_resolve_expr (po
))
5931 /* Update the arglist of an EXPR_COMPCALL expression to include the
5935 update_compcall_arglist (gfc_expr
* e
)
5938 gfc_typebound_proc
* tbp
;
5940 tbp
= e
->value
.compcall
.tbp
;
5945 po
= extract_compcall_passed_object (e
);
5949 if (tbp
->nopass
|| e
->value
.compcall
.ignore_pass
)
5955 if (tbp
->pass_arg_num
<= 0)
5958 e
->value
.compcall
.actual
= update_arglist_pass (e
->value
.compcall
.actual
, po
,
5966 /* Extract the passed object from a PPC call (a copy of it). */
5969 extract_ppc_passed_object (gfc_expr
*e
)
5974 po
= gfc_get_expr ();
5975 po
->expr_type
= EXPR_VARIABLE
;
5976 po
->symtree
= e
->symtree
;
5977 po
->ref
= gfc_copy_ref (e
->ref
);
5978 po
->where
= e
->where
;
5980 /* Remove PPC reference. */
5982 while ((*ref
)->next
)
5983 ref
= &(*ref
)->next
;
5984 gfc_free_ref_list (*ref
);
5987 if (!gfc_resolve_expr (po
))
5994 /* Update the actual arglist of a procedure pointer component to include the
5998 update_ppc_arglist (gfc_expr
* e
)
6002 gfc_typebound_proc
* tb
;
6004 ppc
= gfc_get_proc_ptr_comp (e
);
6012 else if (tb
->nopass
)
6015 po
= extract_ppc_passed_object (e
);
6022 gfc_error ("Passed-object at %L must be scalar", &e
->where
);
6027 if (po
->ts
.type
== BT_DERIVED
&& po
->ts
.u
.derived
->attr
.abstract
)
6029 gfc_error ("Base object for procedure-pointer component call at %L is of"
6030 " ABSTRACT type %qs", &e
->where
, po
->ts
.u
.derived
->name
);
6034 gcc_assert (tb
->pass_arg_num
> 0);
6035 e
->value
.compcall
.actual
= update_arglist_pass (e
->value
.compcall
.actual
, po
,
6043 /* Check that the object a TBP is called on is valid, i.e. it must not be
6044 of ABSTRACT type (as in subobject%abstract_parent%tbp()). */
6047 check_typebound_baseobject (gfc_expr
* e
)
6050 bool return_value
= false;
6052 base
= extract_compcall_passed_object (e
);
6056 gcc_assert (base
->ts
.type
== BT_DERIVED
|| base
->ts
.type
== BT_CLASS
);
6058 if (base
->ts
.type
== BT_CLASS
&& !gfc_expr_attr (base
).class_ok
)
6062 if (base
->ts
.type
== BT_DERIVED
&& base
->ts
.u
.derived
->attr
.abstract
)
6064 gfc_error ("Base object for type-bound procedure call at %L is of"
6065 " ABSTRACT type %qs", &e
->where
, base
->ts
.u
.derived
->name
);
6069 /* F08:C1230. If the procedure called is NOPASS,
6070 the base object must be scalar. */
6071 if (e
->value
.compcall
.tbp
->nopass
&& base
->rank
!= 0)
6073 gfc_error ("Base object for NOPASS type-bound procedure call at %L must"
6074 " be scalar", &e
->where
);
6078 return_value
= true;
6081 gfc_free_expr (base
);
6082 return return_value
;
6086 /* Resolve a call to a type-bound procedure, either function or subroutine,
6087 statically from the data in an EXPR_COMPCALL expression. The adapted
6088 arglist and the target-procedure symtree are returned. */
6091 resolve_typebound_static (gfc_expr
* e
, gfc_symtree
** target
,
6092 gfc_actual_arglist
** actual
)
6094 gcc_assert (e
->expr_type
== EXPR_COMPCALL
);
6095 gcc_assert (!e
->value
.compcall
.tbp
->is_generic
);
6097 /* Update the actual arglist for PASS. */
6098 if (!update_compcall_arglist (e
))
6101 *actual
= e
->value
.compcall
.actual
;
6102 *target
= e
->value
.compcall
.tbp
->u
.specific
;
6104 gfc_free_ref_list (e
->ref
);
6106 e
->value
.compcall
.actual
= NULL
;
6108 /* If we find a deferred typebound procedure, check for derived types
6109 that an overriding typebound procedure has not been missed. */
6110 if (e
->value
.compcall
.name
6111 && !e
->value
.compcall
.tbp
->non_overridable
6112 && e
->value
.compcall
.base_object
6113 && e
->value
.compcall
.base_object
->ts
.type
== BT_DERIVED
)
6116 gfc_symbol
*derived
;
6118 /* Use the derived type of the base_object. */
6119 derived
= e
->value
.compcall
.base_object
->ts
.u
.derived
;
6122 /* If necessary, go through the inheritance chain. */
6123 while (!st
&& derived
)
6125 /* Look for the typebound procedure 'name'. */
6126 if (derived
->f2k_derived
&& derived
->f2k_derived
->tb_sym_root
)
6127 st
= gfc_find_symtree (derived
->f2k_derived
->tb_sym_root
,
6128 e
->value
.compcall
.name
);
6130 derived
= gfc_get_derived_super_type (derived
);
6133 /* Now find the specific name in the derived type namespace. */
6134 if (st
&& st
->n
.tb
&& st
->n
.tb
->u
.specific
)
6135 gfc_find_sym_tree (st
->n
.tb
->u
.specific
->name
,
6136 derived
->ns
, 1, &st
);
6144 /* Get the ultimate declared type from an expression. In addition,
6145 return the last class/derived type reference and the copy of the
6146 reference list. If check_types is set true, derived types are
6147 identified as well as class references. */
6149 get_declared_from_expr (gfc_ref
**class_ref
, gfc_ref
**new_ref
,
6150 gfc_expr
*e
, bool check_types
)
6152 gfc_symbol
*declared
;
6159 *new_ref
= gfc_copy_ref (e
->ref
);
6161 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
6163 if (ref
->type
!= REF_COMPONENT
)
6166 if ((ref
->u
.c
.component
->ts
.type
== BT_CLASS
6167 || (check_types
&& gfc_bt_struct (ref
->u
.c
.component
->ts
.type
)))
6168 && ref
->u
.c
.component
->attr
.flavor
!= FL_PROCEDURE
)
6170 declared
= ref
->u
.c
.component
->ts
.u
.derived
;
6176 if (declared
== NULL
)
6177 declared
= e
->symtree
->n
.sym
->ts
.u
.derived
;
6183 /* Given an EXPR_COMPCALL calling a GENERIC typebound procedure, figure out
6184 which of the specific bindings (if any) matches the arglist and transform
6185 the expression into a call of that binding. */
6188 resolve_typebound_generic_call (gfc_expr
* e
, const char **name
)
6190 gfc_typebound_proc
* genproc
;
6191 const char* genname
;
6193 gfc_symbol
*derived
;
6195 gcc_assert (e
->expr_type
== EXPR_COMPCALL
);
6196 genname
= e
->value
.compcall
.name
;
6197 genproc
= e
->value
.compcall
.tbp
;
6199 if (!genproc
->is_generic
)
6202 /* Try the bindings on this type and in the inheritance hierarchy. */
6203 for (; genproc
; genproc
= genproc
->overridden
)
6207 gcc_assert (genproc
->is_generic
);
6208 for (g
= genproc
->u
.generic
; g
; g
= g
->next
)
6211 gfc_actual_arglist
* args
;
6214 gcc_assert (g
->specific
);
6216 if (g
->specific
->error
)
6219 target
= g
->specific
->u
.specific
->n
.sym
;
6221 /* Get the right arglist by handling PASS/NOPASS. */
6222 args
= gfc_copy_actual_arglist (e
->value
.compcall
.actual
);
6223 if (!g
->specific
->nopass
)
6226 po
= extract_compcall_passed_object (e
);
6229 gfc_free_actual_arglist (args
);
6233 gcc_assert (g
->specific
->pass_arg_num
> 0);
6234 gcc_assert (!g
->specific
->error
);
6235 args
= update_arglist_pass (args
, po
, g
->specific
->pass_arg_num
,
6236 g
->specific
->pass_arg
);
6238 resolve_actual_arglist (args
, target
->attr
.proc
,
6239 is_external_proc (target
)
6240 && gfc_sym_get_dummy_args (target
) == NULL
);
6242 /* Check if this arglist matches the formal. */
6243 matches
= gfc_arglist_matches_symbol (&args
, target
);
6245 /* Clean up and break out of the loop if we've found it. */
6246 gfc_free_actual_arglist (args
);
6249 e
->value
.compcall
.tbp
= g
->specific
;
6250 genname
= g
->specific_st
->name
;
6251 /* Pass along the name for CLASS methods, where the vtab
6252 procedure pointer component has to be referenced. */
6260 /* Nothing matching found! */
6261 gfc_error ("Found no matching specific binding for the call to the GENERIC"
6262 " %qs at %L", genname
, &e
->where
);
6266 /* Make sure that we have the right specific instance for the name. */
6267 derived
= get_declared_from_expr (NULL
, NULL
, e
, true);
6269 st
= gfc_find_typebound_proc (derived
, NULL
, genname
, true, &e
->where
);
6271 e
->value
.compcall
.tbp
= st
->n
.tb
;
6277 /* Resolve a call to a type-bound subroutine. */
6280 resolve_typebound_call (gfc_code
* c
, const char **name
, bool *overridable
)
6282 gfc_actual_arglist
* newactual
;
6283 gfc_symtree
* target
;
6285 /* Check that's really a SUBROUTINE. */
6286 if (!c
->expr1
->value
.compcall
.tbp
->subroutine
)
6288 if (!c
->expr1
->value
.compcall
.tbp
->is_generic
6289 && c
->expr1
->value
.compcall
.tbp
->u
.specific
6290 && c
->expr1
->value
.compcall
.tbp
->u
.specific
->n
.sym
6291 && c
->expr1
->value
.compcall
.tbp
->u
.specific
->n
.sym
->attr
.subroutine
)
6292 c
->expr1
->value
.compcall
.tbp
->subroutine
= 1;
6295 gfc_error ("%qs at %L should be a SUBROUTINE",
6296 c
->expr1
->value
.compcall
.name
, &c
->loc
);
6301 if (!check_typebound_baseobject (c
->expr1
))
6304 /* Pass along the name for CLASS methods, where the vtab
6305 procedure pointer component has to be referenced. */
6307 *name
= c
->expr1
->value
.compcall
.name
;
6309 if (!resolve_typebound_generic_call (c
->expr1
, name
))
6312 /* Pass along the NON_OVERRIDABLE attribute of the specific TBP. */
6314 *overridable
= !c
->expr1
->value
.compcall
.tbp
->non_overridable
;
6316 /* Transform into an ordinary EXEC_CALL for now. */
6318 if (!resolve_typebound_static (c
->expr1
, &target
, &newactual
))
6321 c
->ext
.actual
= newactual
;
6322 c
->symtree
= target
;
6323 c
->op
= (c
->expr1
->value
.compcall
.assign
? EXEC_ASSIGN_CALL
: EXEC_CALL
);
6325 gcc_assert (!c
->expr1
->ref
&& !c
->expr1
->value
.compcall
.actual
);
6327 gfc_free_expr (c
->expr1
);
6328 c
->expr1
= gfc_get_expr ();
6329 c
->expr1
->expr_type
= EXPR_FUNCTION
;
6330 c
->expr1
->symtree
= target
;
6331 c
->expr1
->where
= c
->loc
;
6333 return resolve_call (c
);
6337 /* Resolve a component-call expression. */
6339 resolve_compcall (gfc_expr
* e
, const char **name
)
6341 gfc_actual_arglist
* newactual
;
6342 gfc_symtree
* target
;
6344 /* Check that's really a FUNCTION. */
6345 if (!e
->value
.compcall
.tbp
->function
)
6347 gfc_error ("%qs at %L should be a FUNCTION",
6348 e
->value
.compcall
.name
, &e
->where
);
6352 /* These must not be assign-calls! */
6353 gcc_assert (!e
->value
.compcall
.assign
);
6355 if (!check_typebound_baseobject (e
))
6358 /* Pass along the name for CLASS methods, where the vtab
6359 procedure pointer component has to be referenced. */
6361 *name
= e
->value
.compcall
.name
;
6363 if (!resolve_typebound_generic_call (e
, name
))
6365 gcc_assert (!e
->value
.compcall
.tbp
->is_generic
);
6367 /* Take the rank from the function's symbol. */
6368 if (e
->value
.compcall
.tbp
->u
.specific
->n
.sym
->as
)
6369 e
->rank
= e
->value
.compcall
.tbp
->u
.specific
->n
.sym
->as
->rank
;
6371 /* For now, we simply transform it into an EXPR_FUNCTION call with the same
6372 arglist to the TBP's binding target. */
6374 if (!resolve_typebound_static (e
, &target
, &newactual
))
6377 e
->value
.function
.actual
= newactual
;
6378 e
->value
.function
.name
= NULL
;
6379 e
->value
.function
.esym
= target
->n
.sym
;
6380 e
->value
.function
.isym
= NULL
;
6381 e
->symtree
= target
;
6382 e
->ts
= target
->n
.sym
->ts
;
6383 e
->expr_type
= EXPR_FUNCTION
;
6385 /* Resolution is not necessary if this is a class subroutine; this
6386 function only has to identify the specific proc. Resolution of
6387 the call will be done next in resolve_typebound_call. */
6388 return gfc_resolve_expr (e
);
6392 static bool resolve_fl_derived (gfc_symbol
*sym
);
6395 /* Resolve a typebound function, or 'method'. First separate all
6396 the non-CLASS references by calling resolve_compcall directly. */
6399 resolve_typebound_function (gfc_expr
* e
)
6401 gfc_symbol
*declared
;
6413 /* Deal with typebound operators for CLASS objects. */
6414 expr
= e
->value
.compcall
.base_object
;
6415 overridable
= !e
->value
.compcall
.tbp
->non_overridable
;
6416 if (expr
&& expr
->ts
.type
== BT_CLASS
&& e
->value
.compcall
.name
)
6418 /* If the base_object is not a variable, the corresponding actual
6419 argument expression must be stored in e->base_expression so
6420 that the corresponding tree temporary can be used as the base
6421 object in gfc_conv_procedure_call. */
6422 if (expr
->expr_type
!= EXPR_VARIABLE
)
6424 gfc_actual_arglist
*args
;
6426 for (args
= e
->value
.function
.actual
; args
; args
= args
->next
)
6428 if (expr
== args
->expr
)
6433 /* Since the typebound operators are generic, we have to ensure
6434 that any delays in resolution are corrected and that the vtab
6437 declared
= ts
.u
.derived
;
6438 c
= gfc_find_component (declared
, "_vptr", true, true, NULL
);
6439 if (c
->ts
.u
.derived
== NULL
)
6440 c
->ts
.u
.derived
= gfc_find_derived_vtab (declared
);
6442 if (!resolve_compcall (e
, &name
))
6445 /* Use the generic name if it is there. */
6446 name
= name
? name
: e
->value
.function
.esym
->name
;
6447 e
->symtree
= expr
->symtree
;
6448 e
->ref
= gfc_copy_ref (expr
->ref
);
6449 get_declared_from_expr (&class_ref
, NULL
, e
, false);
6451 /* Trim away the extraneous references that emerge from nested
6452 use of interface.c (extend_expr). */
6453 if (class_ref
&& class_ref
->next
)
6455 gfc_free_ref_list (class_ref
->next
);
6456 class_ref
->next
= NULL
;
6458 else if (e
->ref
&& !class_ref
&& expr
->ts
.type
!= BT_CLASS
)
6460 gfc_free_ref_list (e
->ref
);
6464 gfc_add_vptr_component (e
);
6465 gfc_add_component_ref (e
, name
);
6466 e
->value
.function
.esym
= NULL
;
6467 if (expr
->expr_type
!= EXPR_VARIABLE
)
6468 e
->base_expr
= expr
;
6473 return resolve_compcall (e
, NULL
);
6475 if (!resolve_ref (e
))
6478 /* Get the CLASS declared type. */
6479 declared
= get_declared_from_expr (&class_ref
, &new_ref
, e
, true);
6481 if (!resolve_fl_derived (declared
))
6484 /* Weed out cases of the ultimate component being a derived type. */
6485 if ((class_ref
&& gfc_bt_struct (class_ref
->u
.c
.component
->ts
.type
))
6486 || (!class_ref
&& st
->n
.sym
->ts
.type
!= BT_CLASS
))
6488 gfc_free_ref_list (new_ref
);
6489 return resolve_compcall (e
, NULL
);
6492 c
= gfc_find_component (declared
, "_data", true, true, NULL
);
6493 declared
= c
->ts
.u
.derived
;
6495 /* Treat the call as if it is a typebound procedure, in order to roll
6496 out the correct name for the specific function. */
6497 if (!resolve_compcall (e
, &name
))
6499 gfc_free_ref_list (new_ref
);
6506 /* Convert the expression to a procedure pointer component call. */
6507 e
->value
.function
.esym
= NULL
;
6513 /* '_vptr' points to the vtab, which contains the procedure pointers. */
6514 gfc_add_vptr_component (e
);
6515 gfc_add_component_ref (e
, name
);
6517 /* Recover the typespec for the expression. This is really only
6518 necessary for generic procedures, where the additional call
6519 to gfc_add_component_ref seems to throw the collection of the
6520 correct typespec. */
6524 gfc_free_ref_list (new_ref
);
6529 /* Resolve a typebound subroutine, or 'method'. First separate all
6530 the non-CLASS references by calling resolve_typebound_call
6534 resolve_typebound_subroutine (gfc_code
*code
)
6536 gfc_symbol
*declared
;
6546 st
= code
->expr1
->symtree
;
6548 /* Deal with typebound operators for CLASS objects. */
6549 expr
= code
->expr1
->value
.compcall
.base_object
;
6550 overridable
= !code
->expr1
->value
.compcall
.tbp
->non_overridable
;
6551 if (expr
&& expr
->ts
.type
== BT_CLASS
&& code
->expr1
->value
.compcall
.name
)
6553 /* If the base_object is not a variable, the corresponding actual
6554 argument expression must be stored in e->base_expression so
6555 that the corresponding tree temporary can be used as the base
6556 object in gfc_conv_procedure_call. */
6557 if (expr
->expr_type
!= EXPR_VARIABLE
)
6559 gfc_actual_arglist
*args
;
6561 args
= code
->expr1
->value
.function
.actual
;
6562 for (; args
; args
= args
->next
)
6563 if (expr
== args
->expr
)
6567 /* Since the typebound operators are generic, we have to ensure
6568 that any delays in resolution are corrected and that the vtab
6570 declared
= expr
->ts
.u
.derived
;
6571 c
= gfc_find_component (declared
, "_vptr", true, true, NULL
);
6572 if (c
->ts
.u
.derived
== NULL
)
6573 c
->ts
.u
.derived
= gfc_find_derived_vtab (declared
);
6575 if (!resolve_typebound_call (code
, &name
, NULL
))
6578 /* Use the generic name if it is there. */
6579 name
= name
? name
: code
->expr1
->value
.function
.esym
->name
;
6580 code
->expr1
->symtree
= expr
->symtree
;
6581 code
->expr1
->ref
= gfc_copy_ref (expr
->ref
);
6583 /* Trim away the extraneous references that emerge from nested
6584 use of interface.c (extend_expr). */
6585 get_declared_from_expr (&class_ref
, NULL
, code
->expr1
, false);
6586 if (class_ref
&& class_ref
->next
)
6588 gfc_free_ref_list (class_ref
->next
);
6589 class_ref
->next
= NULL
;
6591 else if (code
->expr1
->ref
&& !class_ref
)
6593 gfc_free_ref_list (code
->expr1
->ref
);
6594 code
->expr1
->ref
= NULL
;
6597 /* Now use the procedure in the vtable. */
6598 gfc_add_vptr_component (code
->expr1
);
6599 gfc_add_component_ref (code
->expr1
, name
);
6600 code
->expr1
->value
.function
.esym
= NULL
;
6601 if (expr
->expr_type
!= EXPR_VARIABLE
)
6602 code
->expr1
->base_expr
= expr
;
6607 return resolve_typebound_call (code
, NULL
, NULL
);
6609 if (!resolve_ref (code
->expr1
))
6612 /* Get the CLASS declared type. */
6613 get_declared_from_expr (&class_ref
, &new_ref
, code
->expr1
, true);
6615 /* Weed out cases of the ultimate component being a derived type. */
6616 if ((class_ref
&& gfc_bt_struct (class_ref
->u
.c
.component
->ts
.type
))
6617 || (!class_ref
&& st
->n
.sym
->ts
.type
!= BT_CLASS
))
6619 gfc_free_ref_list (new_ref
);
6620 return resolve_typebound_call (code
, NULL
, NULL
);
6623 if (!resolve_typebound_call (code
, &name
, &overridable
))
6625 gfc_free_ref_list (new_ref
);
6628 ts
= code
->expr1
->ts
;
6632 /* Convert the expression to a procedure pointer component call. */
6633 code
->expr1
->value
.function
.esym
= NULL
;
6634 code
->expr1
->symtree
= st
;
6637 code
->expr1
->ref
= new_ref
;
6639 /* '_vptr' points to the vtab, which contains the procedure pointers. */
6640 gfc_add_vptr_component (code
->expr1
);
6641 gfc_add_component_ref (code
->expr1
, name
);
6643 /* Recover the typespec for the expression. This is really only
6644 necessary for generic procedures, where the additional call
6645 to gfc_add_component_ref seems to throw the collection of the
6646 correct typespec. */
6647 code
->expr1
->ts
= ts
;
6650 gfc_free_ref_list (new_ref
);
6656 /* Resolve a CALL to a Procedure Pointer Component (Subroutine). */
6659 resolve_ppc_call (gfc_code
* c
)
6661 gfc_component
*comp
;
6663 comp
= gfc_get_proc_ptr_comp (c
->expr1
);
6664 gcc_assert (comp
!= NULL
);
6666 c
->resolved_sym
= c
->expr1
->symtree
->n
.sym
;
6667 c
->expr1
->expr_type
= EXPR_VARIABLE
;
6669 if (!comp
->attr
.subroutine
)
6670 gfc_add_subroutine (&comp
->attr
, comp
->name
, &c
->expr1
->where
);
6672 if (!resolve_ref (c
->expr1
))
6675 if (!update_ppc_arglist (c
->expr1
))
6678 c
->ext
.actual
= c
->expr1
->value
.compcall
.actual
;
6680 if (!resolve_actual_arglist (c
->ext
.actual
, comp
->attr
.proc
,
6681 !(comp
->ts
.interface
6682 && comp
->ts
.interface
->formal
)))
6685 if (!pure_subroutine (comp
->ts
.interface
, comp
->name
, &c
->expr1
->where
))
6688 gfc_ppc_use (comp
, &c
->expr1
->value
.compcall
.actual
, &c
->expr1
->where
);
6694 /* Resolve a Function Call to a Procedure Pointer Component (Function). */
6697 resolve_expr_ppc (gfc_expr
* e
)
6699 gfc_component
*comp
;
6701 comp
= gfc_get_proc_ptr_comp (e
);
6702 gcc_assert (comp
!= NULL
);
6704 /* Convert to EXPR_FUNCTION. */
6705 e
->expr_type
= EXPR_FUNCTION
;
6706 e
->value
.function
.isym
= NULL
;
6707 e
->value
.function
.actual
= e
->value
.compcall
.actual
;
6709 if (comp
->as
!= NULL
)
6710 e
->rank
= comp
->as
->rank
;
6712 if (!comp
->attr
.function
)
6713 gfc_add_function (&comp
->attr
, comp
->name
, &e
->where
);
6715 if (!resolve_ref (e
))
6718 if (!resolve_actual_arglist (e
->value
.function
.actual
, comp
->attr
.proc
,
6719 !(comp
->ts
.interface
6720 && comp
->ts
.interface
->formal
)))
6723 if (!update_ppc_arglist (e
))
6726 if (!check_pure_function(e
))
6729 gfc_ppc_use (comp
, &e
->value
.compcall
.actual
, &e
->where
);
6736 gfc_is_expandable_expr (gfc_expr
*e
)
6738 gfc_constructor
*con
;
6740 if (e
->expr_type
== EXPR_ARRAY
)
6742 /* Traverse the constructor looking for variables that are flavor
6743 parameter. Parameters must be expanded since they are fully used at
6745 con
= gfc_constructor_first (e
->value
.constructor
);
6746 for (; con
; con
= gfc_constructor_next (con
))
6748 if (con
->expr
->expr_type
== EXPR_VARIABLE
6749 && con
->expr
->symtree
6750 && (con
->expr
->symtree
->n
.sym
->attr
.flavor
== FL_PARAMETER
6751 || con
->expr
->symtree
->n
.sym
->attr
.flavor
== FL_VARIABLE
))
6753 if (con
->expr
->expr_type
== EXPR_ARRAY
6754 && gfc_is_expandable_expr (con
->expr
))
6763 /* Sometimes variables in specification expressions of the result
6764 of module procedures in submodules wind up not being the 'real'
6765 dummy. Find this, if possible, in the namespace of the first
6769 fixup_unique_dummy (gfc_expr
*e
)
6771 gfc_symtree
*st
= NULL
;
6772 gfc_symbol
*s
= NULL
;
6774 if (e
->symtree
->n
.sym
->ns
->proc_name
6775 && e
->symtree
->n
.sym
->ns
->proc_name
->formal
)
6776 s
= e
->symtree
->n
.sym
->ns
->proc_name
->formal
->sym
;
6779 st
= gfc_find_symtree (s
->ns
->sym_root
, e
->symtree
->n
.sym
->name
);
6782 && st
->n
.sym
!= NULL
6783 && st
->n
.sym
->attr
.dummy
)
6787 /* Resolve an expression. That is, make sure that types of operands agree
6788 with their operators, intrinsic operators are converted to function calls
6789 for overloaded types and unresolved function references are resolved. */
6792 gfc_resolve_expr (gfc_expr
*e
)
6795 bool inquiry_save
, actual_arg_save
, first_actual_arg_save
;
6800 /* inquiry_argument only applies to variables. */
6801 inquiry_save
= inquiry_argument
;
6802 actual_arg_save
= actual_arg
;
6803 first_actual_arg_save
= first_actual_arg
;
6805 if (e
->expr_type
!= EXPR_VARIABLE
)
6807 inquiry_argument
= false;
6809 first_actual_arg
= false;
6811 else if (e
->symtree
!= NULL
6812 && *e
->symtree
->name
== '@'
6813 && e
->symtree
->n
.sym
->attr
.dummy
)
6815 /* Deal with submodule specification expressions that are not
6816 found to be referenced in module.c(read_cleanup). */
6817 fixup_unique_dummy (e
);
6820 switch (e
->expr_type
)
6823 t
= resolve_operator (e
);
6829 if (check_host_association (e
))
6830 t
= resolve_function (e
);
6832 t
= resolve_variable (e
);
6834 if (e
->ts
.type
== BT_CHARACTER
&& e
->ts
.u
.cl
== NULL
&& e
->ref
6835 && e
->ref
->type
!= REF_SUBSTRING
)
6836 gfc_resolve_substring_charlen (e
);
6841 t
= resolve_typebound_function (e
);
6844 case EXPR_SUBSTRING
:
6845 t
= resolve_ref (e
);
6854 t
= resolve_expr_ppc (e
);
6859 if (!resolve_ref (e
))
6862 t
= gfc_resolve_array_constructor (e
);
6863 /* Also try to expand a constructor. */
6866 expression_rank (e
);
6867 if (gfc_is_constant_expr (e
) || gfc_is_expandable_expr (e
))
6868 gfc_expand_constructor (e
, false);
6871 /* This provides the opportunity for the length of constructors with
6872 character valued function elements to propagate the string length
6873 to the expression. */
6874 if (t
&& e
->ts
.type
== BT_CHARACTER
)
6876 /* For efficiency, we call gfc_expand_constructor for BT_CHARACTER
6877 here rather then add a duplicate test for it above. */
6878 gfc_expand_constructor (e
, false);
6879 t
= gfc_resolve_character_array_constructor (e
);
6884 case EXPR_STRUCTURE
:
6885 t
= resolve_ref (e
);
6889 t
= resolve_structure_cons (e
, 0);
6893 t
= gfc_simplify_expr (e
, 0);
6897 gfc_internal_error ("gfc_resolve_expr(): Bad expression type");
6900 if (e
->ts
.type
== BT_CHARACTER
&& t
&& !e
->ts
.u
.cl
)
6903 inquiry_argument
= inquiry_save
;
6904 actual_arg
= actual_arg_save
;
6905 first_actual_arg
= first_actual_arg_save
;
6911 /* Resolve an expression from an iterator. They must be scalar and have
6912 INTEGER or (optionally) REAL type. */
6915 gfc_resolve_iterator_expr (gfc_expr
*expr
, bool real_ok
,
6916 const char *name_msgid
)
6918 if (!gfc_resolve_expr (expr
))
6921 if (expr
->rank
!= 0)
6923 gfc_error ("%s at %L must be a scalar", _(name_msgid
), &expr
->where
);
6927 if (expr
->ts
.type
!= BT_INTEGER
)
6929 if (expr
->ts
.type
== BT_REAL
)
6932 return gfc_notify_std (GFC_STD_F95_DEL
,
6933 "%s at %L must be integer",
6934 _(name_msgid
), &expr
->where
);
6937 gfc_error ("%s at %L must be INTEGER", _(name_msgid
),
6944 gfc_error ("%s at %L must be INTEGER", _(name_msgid
), &expr
->where
);
6952 /* Resolve the expressions in an iterator structure. If REAL_OK is
6953 false allow only INTEGER type iterators, otherwise allow REAL types.
6954 Set own_scope to true for ac-implied-do and data-implied-do as those
6955 have a separate scope such that, e.g., a INTENT(IN) doesn't apply. */
6958 gfc_resolve_iterator (gfc_iterator
*iter
, bool real_ok
, bool own_scope
)
6960 if (!gfc_resolve_iterator_expr (iter
->var
, real_ok
, "Loop variable"))
6963 if (!gfc_check_vardef_context (iter
->var
, false, false, own_scope
,
6964 _("iterator variable")))
6967 if (!gfc_resolve_iterator_expr (iter
->start
, real_ok
,
6968 "Start expression in DO loop"))
6971 if (!gfc_resolve_iterator_expr (iter
->end
, real_ok
,
6972 "End expression in DO loop"))
6975 if (!gfc_resolve_iterator_expr (iter
->step
, real_ok
,
6976 "Step expression in DO loop"))
6979 if (iter
->step
->expr_type
== EXPR_CONSTANT
)
6981 if ((iter
->step
->ts
.type
== BT_INTEGER
6982 && mpz_cmp_ui (iter
->step
->value
.integer
, 0) == 0)
6983 || (iter
->step
->ts
.type
== BT_REAL
6984 && mpfr_sgn (iter
->step
->value
.real
) == 0))
6986 gfc_error ("Step expression in DO loop at %L cannot be zero",
6987 &iter
->step
->where
);
6992 /* Convert start, end, and step to the same type as var. */
6993 if (iter
->start
->ts
.kind
!= iter
->var
->ts
.kind
6994 || iter
->start
->ts
.type
!= iter
->var
->ts
.type
)
6995 gfc_convert_type (iter
->start
, &iter
->var
->ts
, 1);
6997 if (iter
->end
->ts
.kind
!= iter
->var
->ts
.kind
6998 || iter
->end
->ts
.type
!= iter
->var
->ts
.type
)
6999 gfc_convert_type (iter
->end
, &iter
->var
->ts
, 1);
7001 if (iter
->step
->ts
.kind
!= iter
->var
->ts
.kind
7002 || iter
->step
->ts
.type
!= iter
->var
->ts
.type
)
7003 gfc_convert_type (iter
->step
, &iter
->var
->ts
, 1);
7005 if (iter
->start
->expr_type
== EXPR_CONSTANT
7006 && iter
->end
->expr_type
== EXPR_CONSTANT
7007 && iter
->step
->expr_type
== EXPR_CONSTANT
)
7010 if (iter
->start
->ts
.type
== BT_INTEGER
)
7012 sgn
= mpz_cmp_ui (iter
->step
->value
.integer
, 0);
7013 cmp
= mpz_cmp (iter
->end
->value
.integer
, iter
->start
->value
.integer
);
7017 sgn
= mpfr_sgn (iter
->step
->value
.real
);
7018 cmp
= mpfr_cmp (iter
->end
->value
.real
, iter
->start
->value
.real
);
7020 if (warn_zerotrip
&& ((sgn
> 0 && cmp
< 0) || (sgn
< 0 && cmp
> 0)))
7021 gfc_warning (OPT_Wzerotrip
,
7022 "DO loop at %L will be executed zero times",
7023 &iter
->step
->where
);
7026 if (iter
->end
->expr_type
== EXPR_CONSTANT
7027 && iter
->end
->ts
.type
== BT_INTEGER
7028 && iter
->step
->expr_type
== EXPR_CONSTANT
7029 && iter
->step
->ts
.type
== BT_INTEGER
7030 && (mpz_cmp_si (iter
->step
->value
.integer
, -1L) == 0
7031 || mpz_cmp_si (iter
->step
->value
.integer
, 1L) == 0))
7033 bool is_step_positive
= mpz_cmp_ui (iter
->step
->value
.integer
, 1) == 0;
7034 int k
= gfc_validate_kind (BT_INTEGER
, iter
->end
->ts
.kind
, false);
7036 if (is_step_positive
7037 && mpz_cmp (iter
->end
->value
.integer
, gfc_integer_kinds
[k
].huge
) == 0)
7038 gfc_warning (OPT_Wundefined_do_loop
,
7039 "DO loop at %L is undefined as it overflows",
7040 &iter
->step
->where
);
7041 else if (!is_step_positive
7042 && mpz_cmp (iter
->end
->value
.integer
,
7043 gfc_integer_kinds
[k
].min_int
) == 0)
7044 gfc_warning (OPT_Wundefined_do_loop
,
7045 "DO loop at %L is undefined as it underflows",
7046 &iter
->step
->where
);
7053 /* Traversal function for find_forall_index. f == 2 signals that
7054 that variable itself is not to be checked - only the references. */
7057 forall_index (gfc_expr
*expr
, gfc_symbol
*sym
, int *f
)
7059 if (expr
->expr_type
!= EXPR_VARIABLE
)
7062 /* A scalar assignment */
7063 if (!expr
->ref
|| *f
== 1)
7065 if (expr
->symtree
->n
.sym
== sym
)
7077 /* Check whether the FORALL index appears in the expression or not.
7078 Returns true if SYM is found in EXPR. */
7081 find_forall_index (gfc_expr
*expr
, gfc_symbol
*sym
, int f
)
7083 if (gfc_traverse_expr (expr
, sym
, forall_index
, f
))
7090 /* Resolve a list of FORALL iterators. The FORALL index-name is constrained
7091 to be a scalar INTEGER variable. The subscripts and stride are scalar
7092 INTEGERs, and if stride is a constant it must be nonzero.
7093 Furthermore "A subscript or stride in a forall-triplet-spec shall
7094 not contain a reference to any index-name in the
7095 forall-triplet-spec-list in which it appears." (7.5.4.1) */
7098 resolve_forall_iterators (gfc_forall_iterator
*it
)
7100 gfc_forall_iterator
*iter
, *iter2
;
7102 for (iter
= it
; iter
; iter
= iter
->next
)
7104 if (gfc_resolve_expr (iter
->var
)
7105 && (iter
->var
->ts
.type
!= BT_INTEGER
|| iter
->var
->rank
!= 0))
7106 gfc_error ("FORALL index-name at %L must be a scalar INTEGER",
7109 if (gfc_resolve_expr (iter
->start
)
7110 && (iter
->start
->ts
.type
!= BT_INTEGER
|| iter
->start
->rank
!= 0))
7111 gfc_error ("FORALL start expression at %L must be a scalar INTEGER",
7112 &iter
->start
->where
);
7113 if (iter
->var
->ts
.kind
!= iter
->start
->ts
.kind
)
7114 gfc_convert_type (iter
->start
, &iter
->var
->ts
, 1);
7116 if (gfc_resolve_expr (iter
->end
)
7117 && (iter
->end
->ts
.type
!= BT_INTEGER
|| iter
->end
->rank
!= 0))
7118 gfc_error ("FORALL end expression at %L must be a scalar INTEGER",
7120 if (iter
->var
->ts
.kind
!= iter
->end
->ts
.kind
)
7121 gfc_convert_type (iter
->end
, &iter
->var
->ts
, 1);
7123 if (gfc_resolve_expr (iter
->stride
))
7125 if (iter
->stride
->ts
.type
!= BT_INTEGER
|| iter
->stride
->rank
!= 0)
7126 gfc_error ("FORALL stride expression at %L must be a scalar %s",
7127 &iter
->stride
->where
, "INTEGER");
7129 if (iter
->stride
->expr_type
== EXPR_CONSTANT
7130 && mpz_cmp_ui (iter
->stride
->value
.integer
, 0) == 0)
7131 gfc_error ("FORALL stride expression at %L cannot be zero",
7132 &iter
->stride
->where
);
7134 if (iter
->var
->ts
.kind
!= iter
->stride
->ts
.kind
)
7135 gfc_convert_type (iter
->stride
, &iter
->var
->ts
, 1);
7138 for (iter
= it
; iter
; iter
= iter
->next
)
7139 for (iter2
= iter
; iter2
; iter2
= iter2
->next
)
7141 if (find_forall_index (iter2
->start
, iter
->var
->symtree
->n
.sym
, 0)
7142 || find_forall_index (iter2
->end
, iter
->var
->symtree
->n
.sym
, 0)
7143 || find_forall_index (iter2
->stride
, iter
->var
->symtree
->n
.sym
, 0))
7144 gfc_error ("FORALL index %qs may not appear in triplet "
7145 "specification at %L", iter
->var
->symtree
->name
,
7146 &iter2
->start
->where
);
7151 /* Given a pointer to a symbol that is a derived type, see if it's
7152 inaccessible, i.e. if it's defined in another module and the components are
7153 PRIVATE. The search is recursive if necessary. Returns zero if no
7154 inaccessible components are found, nonzero otherwise. */
7157 derived_inaccessible (gfc_symbol
*sym
)
7161 if (sym
->attr
.use_assoc
&& sym
->attr
.private_comp
)
7164 for (c
= sym
->components
; c
; c
= c
->next
)
7166 /* Prevent an infinite loop through this function. */
7167 if (c
->ts
.type
== BT_DERIVED
&& c
->attr
.pointer
7168 && sym
== c
->ts
.u
.derived
)
7171 if (c
->ts
.type
== BT_DERIVED
&& derived_inaccessible (c
->ts
.u
.derived
))
7179 /* Resolve the argument of a deallocate expression. The expression must be
7180 a pointer or a full array. */
7183 resolve_deallocate_expr (gfc_expr
*e
)
7185 symbol_attribute attr
;
7186 int allocatable
, pointer
;
7192 if (!gfc_resolve_expr (e
))
7195 if (e
->expr_type
!= EXPR_VARIABLE
)
7198 sym
= e
->symtree
->n
.sym
;
7199 unlimited
= UNLIMITED_POLY(sym
);
7201 if (sym
->ts
.type
== BT_CLASS
)
7203 allocatable
= CLASS_DATA (sym
)->attr
.allocatable
;
7204 pointer
= CLASS_DATA (sym
)->attr
.class_pointer
;
7208 allocatable
= sym
->attr
.allocatable
;
7209 pointer
= sym
->attr
.pointer
;
7211 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
7216 if (ref
->u
.ar
.type
!= AR_FULL
7217 && !(ref
->u
.ar
.type
== AR_ELEMENT
&& ref
->u
.ar
.as
->rank
== 0
7218 && ref
->u
.ar
.codimen
&& gfc_ref_this_image (ref
)))
7223 c
= ref
->u
.c
.component
;
7224 if (c
->ts
.type
== BT_CLASS
)
7226 allocatable
= CLASS_DATA (c
)->attr
.allocatable
;
7227 pointer
= CLASS_DATA (c
)->attr
.class_pointer
;
7231 allocatable
= c
->attr
.allocatable
;
7232 pointer
= c
->attr
.pointer
;
7243 attr
= gfc_expr_attr (e
);
7245 if (allocatable
== 0 && attr
.pointer
== 0 && !unlimited
)
7248 gfc_error ("Allocate-object at %L must be ALLOCATABLE or a POINTER",
7254 if (gfc_is_coindexed (e
))
7256 gfc_error ("Coindexed allocatable object at %L", &e
->where
);
7261 && !gfc_check_vardef_context (e
, true, true, false,
7262 _("DEALLOCATE object")))
7264 if (!gfc_check_vardef_context (e
, false, true, false,
7265 _("DEALLOCATE object")))
7272 /* Returns true if the expression e contains a reference to the symbol sym. */
7274 sym_in_expr (gfc_expr
*e
, gfc_symbol
*sym
, int *f ATTRIBUTE_UNUSED
)
7276 if (e
->expr_type
== EXPR_VARIABLE
&& e
->symtree
->n
.sym
== sym
)
7283 gfc_find_sym_in_expr (gfc_symbol
*sym
, gfc_expr
*e
)
7285 return gfc_traverse_expr (e
, sym
, sym_in_expr
, 0);
7289 /* Given the expression node e for an allocatable/pointer of derived type to be
7290 allocated, get the expression node to be initialized afterwards (needed for
7291 derived types with default initializers, and derived types with allocatable
7292 components that need nullification.) */
7295 gfc_expr_to_initialize (gfc_expr
*e
)
7301 result
= gfc_copy_expr (e
);
7303 /* Change the last array reference from AR_ELEMENT to AR_FULL. */
7304 for (ref
= result
->ref
; ref
; ref
= ref
->next
)
7305 if (ref
->type
== REF_ARRAY
&& ref
->next
== NULL
)
7307 ref
->u
.ar
.type
= AR_FULL
;
7309 for (i
= 0; i
< ref
->u
.ar
.dimen
; i
++)
7310 ref
->u
.ar
.start
[i
] = ref
->u
.ar
.end
[i
] = ref
->u
.ar
.stride
[i
] = NULL
;
7315 gfc_free_shape (&result
->shape
, result
->rank
);
7317 /* Recalculate rank, shape, etc. */
7318 gfc_resolve_expr (result
);
7323 /* If the last ref of an expression is an array ref, return a copy of the
7324 expression with that one removed. Otherwise, a copy of the original
7325 expression. This is used for allocate-expressions and pointer assignment
7326 LHS, where there may be an array specification that needs to be stripped
7327 off when using gfc_check_vardef_context. */
7330 remove_last_array_ref (gfc_expr
* e
)
7335 e2
= gfc_copy_expr (e
);
7336 for (r
= &e2
->ref
; *r
; r
= &(*r
)->next
)
7337 if ((*r
)->type
== REF_ARRAY
&& !(*r
)->next
)
7339 gfc_free_ref_list (*r
);
7348 /* Used in resolve_allocate_expr to check that a allocation-object and
7349 a source-expr are conformable. This does not catch all possible
7350 cases; in particular a runtime checking is needed. */
7353 conformable_arrays (gfc_expr
*e1
, gfc_expr
*e2
)
7356 for (tail
= e2
->ref
; tail
&& tail
->next
; tail
= tail
->next
);
7358 /* First compare rank. */
7359 if ((tail
&& e1
->rank
!= tail
->u
.ar
.as
->rank
)
7360 || (!tail
&& e1
->rank
!= e2
->rank
))
7362 gfc_error ("Source-expr at %L must be scalar or have the "
7363 "same rank as the allocate-object at %L",
7364 &e1
->where
, &e2
->where
);
7375 for (i
= 0; i
< e1
->rank
; i
++)
7377 if (tail
->u
.ar
.start
[i
] == NULL
)
7380 if (tail
->u
.ar
.end
[i
])
7382 mpz_set (s
, tail
->u
.ar
.end
[i
]->value
.integer
);
7383 mpz_sub (s
, s
, tail
->u
.ar
.start
[i
]->value
.integer
);
7384 mpz_add_ui (s
, s
, 1);
7388 mpz_set (s
, tail
->u
.ar
.start
[i
]->value
.integer
);
7391 if (mpz_cmp (e1
->shape
[i
], s
) != 0)
7393 gfc_error ("Source-expr at %L and allocate-object at %L must "
7394 "have the same shape", &e1
->where
, &e2
->where
);
7407 /* Resolve the expression in an ALLOCATE statement, doing the additional
7408 checks to see whether the expression is OK or not. The expression must
7409 have a trailing array reference that gives the size of the array. */
7412 resolve_allocate_expr (gfc_expr
*e
, gfc_code
*code
, bool *array_alloc_wo_spec
)
7414 int i
, pointer
, allocatable
, dimension
, is_abstract
;
7418 symbol_attribute attr
;
7419 gfc_ref
*ref
, *ref2
;
7422 gfc_symbol
*sym
= NULL
;
7427 /* Mark the utmost array component as being in allocate to allow DIMEN_STAR
7428 checking of coarrays. */
7429 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
7430 if (ref
->next
== NULL
)
7433 if (ref
&& ref
->type
== REF_ARRAY
)
7434 ref
->u
.ar
.in_allocate
= true;
7436 if (!gfc_resolve_expr (e
))
7439 /* Make sure the expression is allocatable or a pointer. If it is
7440 pointer, the next-to-last reference must be a pointer. */
7444 sym
= e
->symtree
->n
.sym
;
7446 /* Check whether ultimate component is abstract and CLASS. */
7449 /* Is the allocate-object unlimited polymorphic? */
7450 unlimited
= UNLIMITED_POLY(e
);
7452 if (e
->expr_type
!= EXPR_VARIABLE
)
7455 attr
= gfc_expr_attr (e
);
7456 pointer
= attr
.pointer
;
7457 dimension
= attr
.dimension
;
7458 codimension
= attr
.codimension
;
7462 if (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
))
7464 allocatable
= CLASS_DATA (sym
)->attr
.allocatable
;
7465 pointer
= CLASS_DATA (sym
)->attr
.class_pointer
;
7466 dimension
= CLASS_DATA (sym
)->attr
.dimension
;
7467 codimension
= CLASS_DATA (sym
)->attr
.codimension
;
7468 is_abstract
= CLASS_DATA (sym
)->attr
.abstract
;
7472 allocatable
= sym
->attr
.allocatable
;
7473 pointer
= sym
->attr
.pointer
;
7474 dimension
= sym
->attr
.dimension
;
7475 codimension
= sym
->attr
.codimension
;
7480 for (ref
= e
->ref
; ref
; ref2
= ref
, ref
= ref
->next
)
7485 if (ref
->u
.ar
.codimen
> 0)
7488 for (n
= ref
->u
.ar
.dimen
;
7489 n
< ref
->u
.ar
.dimen
+ ref
->u
.ar
.codimen
; n
++)
7490 if (ref
->u
.ar
.dimen_type
[n
] != DIMEN_THIS_IMAGE
)
7497 if (ref
->next
!= NULL
)
7505 gfc_error ("Coindexed allocatable object at %L",
7510 c
= ref
->u
.c
.component
;
7511 if (c
->ts
.type
== BT_CLASS
)
7513 allocatable
= CLASS_DATA (c
)->attr
.allocatable
;
7514 pointer
= CLASS_DATA (c
)->attr
.class_pointer
;
7515 dimension
= CLASS_DATA (c
)->attr
.dimension
;
7516 codimension
= CLASS_DATA (c
)->attr
.codimension
;
7517 is_abstract
= CLASS_DATA (c
)->attr
.abstract
;
7521 allocatable
= c
->attr
.allocatable
;
7522 pointer
= c
->attr
.pointer
;
7523 dimension
= c
->attr
.dimension
;
7524 codimension
= c
->attr
.codimension
;
7525 is_abstract
= c
->attr
.abstract
;
7538 /* Check for F08:C628. */
7539 if (allocatable
== 0 && pointer
== 0 && !unlimited
)
7541 gfc_error ("Allocate-object at %L must be ALLOCATABLE or a POINTER",
7546 /* Some checks for the SOURCE tag. */
7549 /* Check F03:C631. */
7550 if (!gfc_type_compatible (&e
->ts
, &code
->expr3
->ts
))
7552 gfc_error ("Type of entity at %L is type incompatible with "
7553 "source-expr at %L", &e
->where
, &code
->expr3
->where
);
7557 /* Check F03:C632 and restriction following Note 6.18. */
7558 if (code
->expr3
->rank
> 0 && !conformable_arrays (code
->expr3
, e
))
7561 /* Check F03:C633. */
7562 if (code
->expr3
->ts
.kind
!= e
->ts
.kind
&& !unlimited
)
7564 gfc_error ("The allocate-object at %L and the source-expr at %L "
7565 "shall have the same kind type parameter",
7566 &e
->where
, &code
->expr3
->where
);
7570 /* Check F2008, C642. */
7571 if (code
->expr3
->ts
.type
== BT_DERIVED
7572 && ((codimension
&& gfc_expr_attr (code
->expr3
).lock_comp
)
7573 || (code
->expr3
->ts
.u
.derived
->from_intmod
7574 == INTMOD_ISO_FORTRAN_ENV
7575 && code
->expr3
->ts
.u
.derived
->intmod_sym_id
7576 == ISOFORTRAN_LOCK_TYPE
)))
7578 gfc_error ("The source-expr at %L shall neither be of type "
7579 "LOCK_TYPE nor have a LOCK_TYPE component if "
7580 "allocate-object at %L is a coarray",
7581 &code
->expr3
->where
, &e
->where
);
7585 /* Check TS18508, C702/C703. */
7586 if (code
->expr3
->ts
.type
== BT_DERIVED
7587 && ((codimension
&& gfc_expr_attr (code
->expr3
).event_comp
)
7588 || (code
->expr3
->ts
.u
.derived
->from_intmod
7589 == INTMOD_ISO_FORTRAN_ENV
7590 && code
->expr3
->ts
.u
.derived
->intmod_sym_id
7591 == ISOFORTRAN_EVENT_TYPE
)))
7593 gfc_error ("The source-expr at %L shall neither be of type "
7594 "EVENT_TYPE nor have a EVENT_TYPE component if "
7595 "allocate-object at %L is a coarray",
7596 &code
->expr3
->where
, &e
->where
);
7601 /* Check F08:C629. */
7602 if (is_abstract
&& code
->ext
.alloc
.ts
.type
== BT_UNKNOWN
7605 gcc_assert (e
->ts
.type
== BT_CLASS
);
7606 gfc_error ("Allocating %s of ABSTRACT base type at %L requires a "
7607 "type-spec or source-expr", sym
->name
, &e
->where
);
7611 /* Check F08:C632. */
7612 if (code
->ext
.alloc
.ts
.type
== BT_CHARACTER
&& !e
->ts
.deferred
7613 && !UNLIMITED_POLY (e
))
7617 if (!e
->ts
.u
.cl
->length
)
7620 cmp
= gfc_dep_compare_expr (e
->ts
.u
.cl
->length
,
7621 code
->ext
.alloc
.ts
.u
.cl
->length
);
7622 if (cmp
== 1 || cmp
== -1 || cmp
== -3)
7624 gfc_error ("Allocating %s at %L with type-spec requires the same "
7625 "character-length parameter as in the declaration",
7626 sym
->name
, &e
->where
);
7631 /* In the variable definition context checks, gfc_expr_attr is used
7632 on the expression. This is fooled by the array specification
7633 present in e, thus we have to eliminate that one temporarily. */
7634 e2
= remove_last_array_ref (e
);
7637 t
= gfc_check_vardef_context (e2
, true, true, false,
7638 _("ALLOCATE object"));
7640 t
= gfc_check_vardef_context (e2
, false, true, false,
7641 _("ALLOCATE object"));
7646 if (e
->ts
.type
== BT_CLASS
&& CLASS_DATA (e
)->attr
.dimension
7647 && !code
->expr3
&& code
->ext
.alloc
.ts
.type
== BT_DERIVED
)
7649 /* For class arrays, the initialization with SOURCE is done
7650 using _copy and trans_call. It is convenient to exploit that
7651 when the allocated type is different from the declared type but
7652 no SOURCE exists by setting expr3. */
7653 code
->expr3
= gfc_default_initializer (&code
->ext
.alloc
.ts
);
7655 else if (flag_coarray
!= GFC_FCOARRAY_LIB
&& e
->ts
.type
== BT_DERIVED
7656 && e
->ts
.u
.derived
->from_intmod
== INTMOD_ISO_FORTRAN_ENV
7657 && e
->ts
.u
.derived
->intmod_sym_id
== ISOFORTRAN_EVENT_TYPE
)
7659 /* We have to zero initialize the integer variable. */
7660 code
->expr3
= gfc_get_int_expr (gfc_default_integer_kind
, &e
->where
, 0);
7663 if (e
->ts
.type
== BT_CLASS
&& !unlimited
&& !UNLIMITED_POLY (code
->expr3
))
7665 /* Make sure the vtab symbol is present when
7666 the module variables are generated. */
7667 gfc_typespec ts
= e
->ts
;
7669 ts
= code
->expr3
->ts
;
7670 else if (code
->ext
.alloc
.ts
.type
== BT_DERIVED
)
7671 ts
= code
->ext
.alloc
.ts
;
7673 /* Finding the vtab also publishes the type's symbol. Therefore this
7674 statement is necessary. */
7675 gfc_find_derived_vtab (ts
.u
.derived
);
7677 else if (unlimited
&& !UNLIMITED_POLY (code
->expr3
))
7679 /* Again, make sure the vtab symbol is present when
7680 the module variables are generated. */
7681 gfc_typespec
*ts
= NULL
;
7683 ts
= &code
->expr3
->ts
;
7685 ts
= &code
->ext
.alloc
.ts
;
7689 /* Finding the vtab also publishes the type's symbol. Therefore this
7690 statement is necessary. */
7694 if (dimension
== 0 && codimension
== 0)
7697 /* Make sure the last reference node is an array specification. */
7699 if (!ref2
|| ref2
->type
!= REF_ARRAY
|| ref2
->u
.ar
.type
== AR_FULL
7700 || (dimension
&& ref2
->u
.ar
.dimen
== 0))
7705 if (!gfc_notify_std (GFC_STD_F2008
, "Array specification required "
7706 "in ALLOCATE statement at %L", &e
->where
))
7708 if (code
->expr3
->rank
!= 0)
7709 *array_alloc_wo_spec
= true;
7712 gfc_error ("Array specification or array-valued SOURCE= "
7713 "expression required in ALLOCATE statement at %L",
7720 gfc_error ("Array specification required in ALLOCATE statement "
7721 "at %L", &e
->where
);
7726 /* Make sure that the array section reference makes sense in the
7727 context of an ALLOCATE specification. */
7732 for (i
= ar
->dimen
; i
< ar
->dimen
+ ar
->codimen
; i
++)
7733 if (ar
->dimen_type
[i
] == DIMEN_THIS_IMAGE
)
7735 gfc_error ("Coarray specification required in ALLOCATE statement "
7736 "at %L", &e
->where
);
7740 for (i
= 0; i
< ar
->dimen
; i
++)
7742 if (ar
->type
== AR_ELEMENT
|| ar
->type
== AR_FULL
)
7745 switch (ar
->dimen_type
[i
])
7751 if (ar
->start
[i
] != NULL
7752 && ar
->end
[i
] != NULL
7753 && ar
->stride
[i
] == NULL
)
7761 case DIMEN_THIS_IMAGE
:
7762 gfc_error ("Bad array specification in ALLOCATE statement at %L",
7768 for (a
= code
->ext
.alloc
.list
; a
; a
= a
->next
)
7770 sym
= a
->expr
->symtree
->n
.sym
;
7772 /* TODO - check derived type components. */
7773 if (gfc_bt_struct (sym
->ts
.type
) || sym
->ts
.type
== BT_CLASS
)
7776 if ((ar
->start
[i
] != NULL
7777 && gfc_find_sym_in_expr (sym
, ar
->start
[i
]))
7778 || (ar
->end
[i
] != NULL
7779 && gfc_find_sym_in_expr (sym
, ar
->end
[i
])))
7781 gfc_error ("%qs must not appear in the array specification at "
7782 "%L in the same ALLOCATE statement where it is "
7783 "itself allocated", sym
->name
, &ar
->where
);
7789 for (i
= ar
->dimen
; i
< ar
->codimen
+ ar
->dimen
; i
++)
7791 if (ar
->dimen_type
[i
] == DIMEN_ELEMENT
7792 || ar
->dimen_type
[i
] == DIMEN_RANGE
)
7794 if (i
== (ar
->dimen
+ ar
->codimen
- 1))
7796 gfc_error ("Expected '*' in coindex specification in ALLOCATE "
7797 "statement at %L", &e
->where
);
7803 if (ar
->dimen_type
[i
] == DIMEN_STAR
&& i
== (ar
->dimen
+ ar
->codimen
- 1)
7804 && ar
->stride
[i
] == NULL
)
7807 gfc_error ("Bad coarray specification in ALLOCATE statement at %L",
7821 resolve_allocate_deallocate (gfc_code
*code
, const char *fcn
)
7823 gfc_expr
*stat
, *errmsg
, *pe
, *qe
;
7824 gfc_alloc
*a
, *p
, *q
;
7827 errmsg
= code
->expr2
;
7829 /* Check the stat variable. */
7832 gfc_check_vardef_context (stat
, false, false, false,
7833 _("STAT variable"));
7835 if ((stat
->ts
.type
!= BT_INTEGER
7836 && !(stat
->ref
&& (stat
->ref
->type
== REF_ARRAY
7837 || stat
->ref
->type
== REF_COMPONENT
)))
7839 gfc_error ("Stat-variable at %L must be a scalar INTEGER "
7840 "variable", &stat
->where
);
7842 for (p
= code
->ext
.alloc
.list
; p
; p
= p
->next
)
7843 if (p
->expr
->symtree
->n
.sym
->name
== stat
->symtree
->n
.sym
->name
)
7845 gfc_ref
*ref1
, *ref2
;
7848 for (ref1
= p
->expr
->ref
, ref2
= stat
->ref
; ref1
&& ref2
;
7849 ref1
= ref1
->next
, ref2
= ref2
->next
)
7851 if (ref1
->type
!= REF_COMPONENT
|| ref2
->type
!= REF_COMPONENT
)
7853 if (ref1
->u
.c
.component
->name
!= ref2
->u
.c
.component
->name
)
7862 gfc_error ("Stat-variable at %L shall not be %sd within "
7863 "the same %s statement", &stat
->where
, fcn
, fcn
);
7869 /* Check the errmsg variable. */
7873 gfc_warning (0, "ERRMSG at %L is useless without a STAT tag",
7876 gfc_check_vardef_context (errmsg
, false, false, false,
7877 _("ERRMSG variable"));
7879 /* F18:R928 alloc-opt is ERRMSG = errmsg-variable
7880 F18:R930 errmsg-variable is scalar-default-char-variable
7881 F18:R906 default-char-variable is variable
7882 F18:C906 default-char-variable shall be default character. */
7883 if ((errmsg
->ts
.type
!= BT_CHARACTER
7885 && (errmsg
->ref
->type
== REF_ARRAY
7886 || errmsg
->ref
->type
== REF_COMPONENT
)))
7888 || errmsg
->ts
.kind
!= gfc_default_character_kind
)
7889 gfc_error ("ERRMSG variable at %L shall be a scalar default CHARACTER "
7890 "variable", &errmsg
->where
);
7892 for (p
= code
->ext
.alloc
.list
; p
; p
= p
->next
)
7893 if (p
->expr
->symtree
->n
.sym
->name
== errmsg
->symtree
->n
.sym
->name
)
7895 gfc_ref
*ref1
, *ref2
;
7898 for (ref1
= p
->expr
->ref
, ref2
= errmsg
->ref
; ref1
&& ref2
;
7899 ref1
= ref1
->next
, ref2
= ref2
->next
)
7901 if (ref1
->type
!= REF_COMPONENT
|| ref2
->type
!= REF_COMPONENT
)
7903 if (ref1
->u
.c
.component
->name
!= ref2
->u
.c
.component
->name
)
7912 gfc_error ("Errmsg-variable at %L shall not be %sd within "
7913 "the same %s statement", &errmsg
->where
, fcn
, fcn
);
7919 /* Check that an allocate-object appears only once in the statement. */
7921 for (p
= code
->ext
.alloc
.list
; p
; p
= p
->next
)
7924 for (q
= p
->next
; q
; q
= q
->next
)
7927 if (pe
->symtree
->n
.sym
->name
== qe
->symtree
->n
.sym
->name
)
7929 /* This is a potential collision. */
7930 gfc_ref
*pr
= pe
->ref
;
7931 gfc_ref
*qr
= qe
->ref
;
7933 /* Follow the references until
7934 a) They start to differ, in which case there is no error;
7935 you can deallocate a%b and a%c in a single statement
7936 b) Both of them stop, which is an error
7937 c) One of them stops, which is also an error. */
7940 if (pr
== NULL
&& qr
== NULL
)
7942 gfc_error ("Allocate-object at %L also appears at %L",
7943 &pe
->where
, &qe
->where
);
7946 else if (pr
!= NULL
&& qr
== NULL
)
7948 gfc_error ("Allocate-object at %L is subobject of"
7949 " object at %L", &pe
->where
, &qe
->where
);
7952 else if (pr
== NULL
&& qr
!= NULL
)
7954 gfc_error ("Allocate-object at %L is subobject of"
7955 " object at %L", &qe
->where
, &pe
->where
);
7958 /* Here, pr != NULL && qr != NULL */
7959 gcc_assert(pr
->type
== qr
->type
);
7960 if (pr
->type
== REF_ARRAY
)
7962 /* Handle cases like allocate(v(3)%x(3), v(2)%x(3)),
7964 gcc_assert (qr
->type
== REF_ARRAY
);
7966 if (pr
->next
&& qr
->next
)
7969 gfc_array_ref
*par
= &(pr
->u
.ar
);
7970 gfc_array_ref
*qar
= &(qr
->u
.ar
);
7972 for (i
=0; i
<par
->dimen
; i
++)
7974 if ((par
->start
[i
] != NULL
7975 || qar
->start
[i
] != NULL
)
7976 && gfc_dep_compare_expr (par
->start
[i
],
7977 qar
->start
[i
]) != 0)
7984 if (pr
->u
.c
.component
->name
!= qr
->u
.c
.component
->name
)
7997 if (strcmp (fcn
, "ALLOCATE") == 0)
7999 bool arr_alloc_wo_spec
= false;
8001 /* Resolving the expr3 in the loop over all objects to allocate would
8002 execute loop invariant code for each loop item. Therefore do it just
8004 if (code
->expr3
&& code
->expr3
->mold
8005 && code
->expr3
->ts
.type
== BT_DERIVED
)
8007 /* Default initialization via MOLD (non-polymorphic). */
8008 gfc_expr
*rhs
= gfc_default_initializer (&code
->expr3
->ts
);
8011 gfc_resolve_expr (rhs
);
8012 gfc_free_expr (code
->expr3
);
8016 for (a
= code
->ext
.alloc
.list
; a
; a
= a
->next
)
8017 resolve_allocate_expr (a
->expr
, code
, &arr_alloc_wo_spec
);
8019 if (arr_alloc_wo_spec
&& code
->expr3
)
8021 /* Mark the allocate to have to take the array specification
8023 code
->ext
.alloc
.arr_spec_from_expr3
= 1;
8028 for (a
= code
->ext
.alloc
.list
; a
; a
= a
->next
)
8029 resolve_deallocate_expr (a
->expr
);
8034 /************ SELECT CASE resolution subroutines ************/
8036 /* Callback function for our mergesort variant. Determines interval
8037 overlaps for CASEs. Return <0 if op1 < op2, 0 for overlap, >0 for
8038 op1 > op2. Assumes we're not dealing with the default case.
8039 We have op1 = (:L), (K:L) or (K:) and op2 = (:N), (M:N) or (M:).
8040 There are nine situations to check. */
8043 compare_cases (const gfc_case
*op1
, const gfc_case
*op2
)
8047 if (op1
->low
== NULL
) /* op1 = (:L) */
8049 /* op2 = (:N), so overlap. */
8051 /* op2 = (M:) or (M:N), L < M */
8052 if (op2
->low
!= NULL
8053 && gfc_compare_expr (op1
->high
, op2
->low
, INTRINSIC_LT
) < 0)
8056 else if (op1
->high
== NULL
) /* op1 = (K:) */
8058 /* op2 = (M:), so overlap. */
8060 /* op2 = (:N) or (M:N), K > N */
8061 if (op2
->high
!= NULL
8062 && gfc_compare_expr (op1
->low
, op2
->high
, INTRINSIC_GT
) > 0)
8065 else /* op1 = (K:L) */
8067 if (op2
->low
== NULL
) /* op2 = (:N), K > N */
8068 retval
= (gfc_compare_expr (op1
->low
, op2
->high
, INTRINSIC_GT
) > 0)
8070 else if (op2
->high
== NULL
) /* op2 = (M:), L < M */
8071 retval
= (gfc_compare_expr (op1
->high
, op2
->low
, INTRINSIC_LT
) < 0)
8073 else /* op2 = (M:N) */
8077 if (gfc_compare_expr (op1
->high
, op2
->low
, INTRINSIC_LT
) < 0)
8080 else if (gfc_compare_expr (op1
->low
, op2
->high
, INTRINSIC_GT
) > 0)
8089 /* Merge-sort a double linked case list, detecting overlap in the
8090 process. LIST is the head of the double linked case list before it
8091 is sorted. Returns the head of the sorted list if we don't see any
8092 overlap, or NULL otherwise. */
8095 check_case_overlap (gfc_case
*list
)
8097 gfc_case
*p
, *q
, *e
, *tail
;
8098 int insize
, nmerges
, psize
, qsize
, cmp
, overlap_seen
;
8100 /* If the passed list was empty, return immediately. */
8107 /* Loop unconditionally. The only exit from this loop is a return
8108 statement, when we've finished sorting the case list. */
8115 /* Count the number of merges we do in this pass. */
8118 /* Loop while there exists a merge to be done. */
8123 /* Count this merge. */
8126 /* Cut the list in two pieces by stepping INSIZE places
8127 forward in the list, starting from P. */
8130 for (i
= 0; i
< insize
; i
++)
8139 /* Now we have two lists. Merge them! */
8140 while (psize
> 0 || (qsize
> 0 && q
!= NULL
))
8142 /* See from which the next case to merge comes from. */
8145 /* P is empty so the next case must come from Q. */
8150 else if (qsize
== 0 || q
== NULL
)
8159 cmp
= compare_cases (p
, q
);
8162 /* The whole case range for P is less than the
8170 /* The whole case range for Q is greater than
8171 the case range for P. */
8178 /* The cases overlap, or they are the same
8179 element in the list. Either way, we must
8180 issue an error and get the next case from P. */
8181 /* FIXME: Sort P and Q by line number. */
8182 gfc_error ("CASE label at %L overlaps with CASE "
8183 "label at %L", &p
->where
, &q
->where
);
8191 /* Add the next element to the merged list. */
8200 /* P has now stepped INSIZE places along, and so has Q. So
8201 they're the same. */
8206 /* If we have done only one merge or none at all, we've
8207 finished sorting the cases. */
8216 /* Otherwise repeat, merging lists twice the size. */
8222 /* Check to see if an expression is suitable for use in a CASE statement.
8223 Makes sure that all case expressions are scalar constants of the same
8224 type. Return false if anything is wrong. */
8227 validate_case_label_expr (gfc_expr
*e
, gfc_expr
*case_expr
)
8229 if (e
== NULL
) return true;
8231 if (e
->ts
.type
!= case_expr
->ts
.type
)
8233 gfc_error ("Expression in CASE statement at %L must be of type %s",
8234 &e
->where
, gfc_basic_typename (case_expr
->ts
.type
));
8238 /* C805 (R808) For a given case-construct, each case-value shall be of
8239 the same type as case-expr. For character type, length differences
8240 are allowed, but the kind type parameters shall be the same. */
8242 if (case_expr
->ts
.type
== BT_CHARACTER
&& e
->ts
.kind
!= case_expr
->ts
.kind
)
8244 gfc_error ("Expression in CASE statement at %L must be of kind %d",
8245 &e
->where
, case_expr
->ts
.kind
);
8249 /* Convert the case value kind to that of case expression kind,
8252 if (e
->ts
.kind
!= case_expr
->ts
.kind
)
8253 gfc_convert_type_warn (e
, &case_expr
->ts
, 2, 0);
8257 gfc_error ("Expression in CASE statement at %L must be scalar",
8266 /* Given a completely parsed select statement, we:
8268 - Validate all expressions and code within the SELECT.
8269 - Make sure that the selection expression is not of the wrong type.
8270 - Make sure that no case ranges overlap.
8271 - Eliminate unreachable cases and unreachable code resulting from
8272 removing case labels.
8274 The standard does allow unreachable cases, e.g. CASE (5:3). But
8275 they are a hassle for code generation, and to prevent that, we just
8276 cut them out here. This is not necessary for overlapping cases
8277 because they are illegal and we never even try to generate code.
8279 We have the additional caveat that a SELECT construct could have
8280 been a computed GOTO in the source code. Fortunately we can fairly
8281 easily work around that here: The case_expr for a "real" SELECT CASE
8282 is in code->expr1, but for a computed GOTO it is in code->expr2. All
8283 we have to do is make sure that the case_expr is a scalar integer
8287 resolve_select (gfc_code
*code
, bool select_type
)
8290 gfc_expr
*case_expr
;
8291 gfc_case
*cp
, *default_case
, *tail
, *head
;
8292 int seen_unreachable
;
8298 if (code
->expr1
== NULL
)
8300 /* This was actually a computed GOTO statement. */
8301 case_expr
= code
->expr2
;
8302 if (case_expr
->ts
.type
!= BT_INTEGER
|| case_expr
->rank
!= 0)
8303 gfc_error ("Selection expression in computed GOTO statement "
8304 "at %L must be a scalar integer expression",
8307 /* Further checking is not necessary because this SELECT was built
8308 by the compiler, so it should always be OK. Just move the
8309 case_expr from expr2 to expr so that we can handle computed
8310 GOTOs as normal SELECTs from here on. */
8311 code
->expr1
= code
->expr2
;
8316 case_expr
= code
->expr1
;
8317 type
= case_expr
->ts
.type
;
8320 if (type
!= BT_LOGICAL
&& type
!= BT_INTEGER
&& type
!= BT_CHARACTER
)
8322 gfc_error ("Argument of SELECT statement at %L cannot be %s",
8323 &case_expr
->where
, gfc_typename (&case_expr
->ts
));
8325 /* Punt. Going on here just produce more garbage error messages. */
8330 if (!select_type
&& case_expr
->rank
!= 0)
8332 gfc_error ("Argument of SELECT statement at %L must be a scalar "
8333 "expression", &case_expr
->where
);
8339 /* Raise a warning if an INTEGER case value exceeds the range of
8340 the case-expr. Later, all expressions will be promoted to the
8341 largest kind of all case-labels. */
8343 if (type
== BT_INTEGER
)
8344 for (body
= code
->block
; body
; body
= body
->block
)
8345 for (cp
= body
->ext
.block
.case_list
; cp
; cp
= cp
->next
)
8348 && gfc_check_integer_range (cp
->low
->value
.integer
,
8349 case_expr
->ts
.kind
) != ARITH_OK
)
8350 gfc_warning (0, "Expression in CASE statement at %L is "
8351 "not in the range of %s", &cp
->low
->where
,
8352 gfc_typename (&case_expr
->ts
));
8355 && cp
->low
!= cp
->high
8356 && gfc_check_integer_range (cp
->high
->value
.integer
,
8357 case_expr
->ts
.kind
) != ARITH_OK
)
8358 gfc_warning (0, "Expression in CASE statement at %L is "
8359 "not in the range of %s", &cp
->high
->where
,
8360 gfc_typename (&case_expr
->ts
));
8363 /* PR 19168 has a long discussion concerning a mismatch of the kinds
8364 of the SELECT CASE expression and its CASE values. Walk the lists
8365 of case values, and if we find a mismatch, promote case_expr to
8366 the appropriate kind. */
8368 if (type
== BT_LOGICAL
|| type
== BT_INTEGER
)
8370 for (body
= code
->block
; body
; body
= body
->block
)
8372 /* Walk the case label list. */
8373 for (cp
= body
->ext
.block
.case_list
; cp
; cp
= cp
->next
)
8375 /* Intercept the DEFAULT case. It does not have a kind. */
8376 if (cp
->low
== NULL
&& cp
->high
== NULL
)
8379 /* Unreachable case ranges are discarded, so ignore. */
8380 if (cp
->low
!= NULL
&& cp
->high
!= NULL
8381 && cp
->low
!= cp
->high
8382 && gfc_compare_expr (cp
->low
, cp
->high
, INTRINSIC_GT
) > 0)
8386 && case_expr
->ts
.kind
!= gfc_kind_max(case_expr
, cp
->low
))
8387 gfc_convert_type_warn (case_expr
, &cp
->low
->ts
, 2, 0);
8389 if (cp
->high
!= NULL
8390 && case_expr
->ts
.kind
!= gfc_kind_max(case_expr
, cp
->high
))
8391 gfc_convert_type_warn (case_expr
, &cp
->high
->ts
, 2, 0);
8396 /* Assume there is no DEFAULT case. */
8397 default_case
= NULL
;
8402 for (body
= code
->block
; body
; body
= body
->block
)
8404 /* Assume the CASE list is OK, and all CASE labels can be matched. */
8406 seen_unreachable
= 0;
8408 /* Walk the case label list, making sure that all case labels
8410 for (cp
= body
->ext
.block
.case_list
; cp
; cp
= cp
->next
)
8412 /* Count the number of cases in the whole construct. */
8415 /* Intercept the DEFAULT case. */
8416 if (cp
->low
== NULL
&& cp
->high
== NULL
)
8418 if (default_case
!= NULL
)
8420 gfc_error ("The DEFAULT CASE at %L cannot be followed "
8421 "by a second DEFAULT CASE at %L",
8422 &default_case
->where
, &cp
->where
);
8433 /* Deal with single value cases and case ranges. Errors are
8434 issued from the validation function. */
8435 if (!validate_case_label_expr (cp
->low
, case_expr
)
8436 || !validate_case_label_expr (cp
->high
, case_expr
))
8442 if (type
== BT_LOGICAL
8443 && ((cp
->low
== NULL
|| cp
->high
== NULL
)
8444 || cp
->low
!= cp
->high
))
8446 gfc_error ("Logical range in CASE statement at %L is not "
8447 "allowed", &cp
->low
->where
);
8452 if (type
== BT_LOGICAL
&& cp
->low
->expr_type
== EXPR_CONSTANT
)
8455 value
= cp
->low
->value
.logical
== 0 ? 2 : 1;
8456 if (value
& seen_logical
)
8458 gfc_error ("Constant logical value in CASE statement "
8459 "is repeated at %L",
8464 seen_logical
|= value
;
8467 if (cp
->low
!= NULL
&& cp
->high
!= NULL
8468 && cp
->low
!= cp
->high
8469 && gfc_compare_expr (cp
->low
, cp
->high
, INTRINSIC_GT
) > 0)
8471 if (warn_surprising
)
8472 gfc_warning (OPT_Wsurprising
,
8473 "Range specification at %L can never be matched",
8476 cp
->unreachable
= 1;
8477 seen_unreachable
= 1;
8481 /* If the case range can be matched, it can also overlap with
8482 other cases. To make sure it does not, we put it in a
8483 double linked list here. We sort that with a merge sort
8484 later on to detect any overlapping cases. */
8488 head
->right
= head
->left
= NULL
;
8493 tail
->right
->left
= tail
;
8500 /* It there was a failure in the previous case label, give up
8501 for this case label list. Continue with the next block. */
8505 /* See if any case labels that are unreachable have been seen.
8506 If so, we eliminate them. This is a bit of a kludge because
8507 the case lists for a single case statement (label) is a
8508 single forward linked lists. */
8509 if (seen_unreachable
)
8511 /* Advance until the first case in the list is reachable. */
8512 while (body
->ext
.block
.case_list
!= NULL
8513 && body
->ext
.block
.case_list
->unreachable
)
8515 gfc_case
*n
= body
->ext
.block
.case_list
;
8516 body
->ext
.block
.case_list
= body
->ext
.block
.case_list
->next
;
8518 gfc_free_case_list (n
);
8521 /* Strip all other unreachable cases. */
8522 if (body
->ext
.block
.case_list
)
8524 for (cp
= body
->ext
.block
.case_list
; cp
&& cp
->next
; cp
= cp
->next
)
8526 if (cp
->next
->unreachable
)
8528 gfc_case
*n
= cp
->next
;
8529 cp
->next
= cp
->next
->next
;
8531 gfc_free_case_list (n
);
8538 /* See if there were overlapping cases. If the check returns NULL,
8539 there was overlap. In that case we don't do anything. If head
8540 is non-NULL, we prepend the DEFAULT case. The sorted list can
8541 then used during code generation for SELECT CASE constructs with
8542 a case expression of a CHARACTER type. */
8545 head
= check_case_overlap (head
);
8547 /* Prepend the default_case if it is there. */
8548 if (head
!= NULL
&& default_case
)
8550 default_case
->left
= NULL
;
8551 default_case
->right
= head
;
8552 head
->left
= default_case
;
8556 /* Eliminate dead blocks that may be the result if we've seen
8557 unreachable case labels for a block. */
8558 for (body
= code
; body
&& body
->block
; body
= body
->block
)
8560 if (body
->block
->ext
.block
.case_list
== NULL
)
8562 /* Cut the unreachable block from the code chain. */
8563 gfc_code
*c
= body
->block
;
8564 body
->block
= c
->block
;
8566 /* Kill the dead block, but not the blocks below it. */
8568 gfc_free_statements (c
);
8572 /* More than two cases is legal but insane for logical selects.
8573 Issue a warning for it. */
8574 if (warn_surprising
&& type
== BT_LOGICAL
&& ncases
> 2)
8575 gfc_warning (OPT_Wsurprising
,
8576 "Logical SELECT CASE block at %L has more that two cases",
8581 /* Check if a derived type is extensible. */
8584 gfc_type_is_extensible (gfc_symbol
*sym
)
8586 return !(sym
->attr
.is_bind_c
|| sym
->attr
.sequence
8587 || (sym
->attr
.is_class
8588 && sym
->components
->ts
.u
.derived
->attr
.unlimited_polymorphic
));
8593 resolve_types (gfc_namespace
*ns
);
8595 /* Resolve an associate-name: Resolve target and ensure the type-spec is
8596 correct as well as possibly the array-spec. */
8599 resolve_assoc_var (gfc_symbol
* sym
, bool resolve_target
)
8603 gcc_assert (sym
->assoc
);
8604 gcc_assert (sym
->attr
.flavor
== FL_VARIABLE
);
8606 /* If this is for SELECT TYPE, the target may not yet be set. In that
8607 case, return. Resolution will be called later manually again when
8609 target
= sym
->assoc
->target
;
8612 gcc_assert (!sym
->assoc
->dangling
);
8614 if (resolve_target
&& !gfc_resolve_expr (target
))
8617 /* For variable targets, we get some attributes from the target. */
8618 if (target
->expr_type
== EXPR_VARIABLE
)
8622 gcc_assert (target
->symtree
);
8623 tsym
= target
->symtree
->n
.sym
;
8625 sym
->attr
.asynchronous
= tsym
->attr
.asynchronous
;
8626 sym
->attr
.volatile_
= tsym
->attr
.volatile_
;
8628 sym
->attr
.target
= tsym
->attr
.target
8629 || gfc_expr_attr (target
).pointer
;
8630 if (is_subref_array (target
))
8631 sym
->attr
.subref_array_pointer
= 1;
8634 if (target
->expr_type
== EXPR_NULL
)
8636 gfc_error ("Selector at %L cannot be NULL()", &target
->where
);
8639 else if (target
->ts
.type
== BT_UNKNOWN
)
8641 gfc_error ("Selector at %L has no type", &target
->where
);
8645 /* Get type if this was not already set. Note that it can be
8646 some other type than the target in case this is a SELECT TYPE
8647 selector! So we must not update when the type is already there. */
8648 if (sym
->ts
.type
== BT_UNKNOWN
)
8649 sym
->ts
= target
->ts
;
8651 gcc_assert (sym
->ts
.type
!= BT_UNKNOWN
);
8653 /* See if this is a valid association-to-variable. */
8654 sym
->assoc
->variable
= (target
->expr_type
== EXPR_VARIABLE
8655 && !gfc_has_vector_subscript (target
));
8657 /* Finally resolve if this is an array or not. */
8658 if (sym
->attr
.dimension
&& target
->rank
== 0)
8660 /* primary.c makes the assumption that a reference to an associate
8661 name followed by a left parenthesis is an array reference. */
8662 if (sym
->ts
.type
!= BT_CHARACTER
)
8663 gfc_error ("Associate-name %qs at %L is used as array",
8664 sym
->name
, &sym
->declared_at
);
8665 sym
->attr
.dimension
= 0;
8670 /* We cannot deal with class selectors that need temporaries. */
8671 if (target
->ts
.type
== BT_CLASS
8672 && gfc_ref_needs_temporary_p (target
->ref
))
8674 gfc_error ("CLASS selector at %L needs a temporary which is not "
8675 "yet implemented", &target
->where
);
8679 if (target
->ts
.type
== BT_CLASS
)
8680 gfc_fix_class_refs (target
);
8682 if (target
->rank
!= 0)
8685 /* The rank may be incorrectly guessed at parsing, therefore make sure
8686 it is corrected now. */
8687 if (sym
->ts
.type
!= BT_CLASS
&& (!sym
->as
|| sym
->assoc
->rankguessed
))
8690 sym
->as
= gfc_get_array_spec ();
8692 as
->rank
= target
->rank
;
8693 as
->type
= AS_DEFERRED
;
8694 as
->corank
= gfc_get_corank (target
);
8695 sym
->attr
.dimension
= 1;
8696 if (as
->corank
!= 0)
8697 sym
->attr
.codimension
= 1;
8699 else if (sym
->ts
.type
== BT_CLASS
&& (!CLASS_DATA (sym
)->as
|| sym
->assoc
->rankguessed
))
8701 if (!CLASS_DATA (sym
)->as
)
8702 CLASS_DATA (sym
)->as
= gfc_get_array_spec ();
8703 as
= CLASS_DATA (sym
)->as
;
8704 as
->rank
= target
->rank
;
8705 as
->type
= AS_DEFERRED
;
8706 as
->corank
= gfc_get_corank (target
);
8707 CLASS_DATA (sym
)->attr
.dimension
= 1;
8708 if (as
->corank
!= 0)
8709 CLASS_DATA (sym
)->attr
.codimension
= 1;
8714 /* target's rank is 0, but the type of the sym is still array valued,
8715 which has to be corrected. */
8716 if (sym
->ts
.type
== BT_CLASS
8717 && CLASS_DATA (sym
) && CLASS_DATA (sym
)->as
)
8720 symbol_attribute attr
;
8721 /* The associated variable's type is still the array type
8722 correct this now. */
8723 gfc_typespec
*ts
= &target
->ts
;
8726 for (ref
= target
->ref
; ref
!= NULL
; ref
= ref
->next
)
8731 ts
= &ref
->u
.c
.component
->ts
;
8734 if (ts
->type
== BT_CLASS
)
8735 ts
= &ts
->u
.derived
->components
->ts
;
8741 /* Create a scalar instance of the current class type. Because the
8742 rank of a class array goes into its name, the type has to be
8743 rebuild. The alternative of (re-)setting just the attributes
8744 and as in the current type, destroys the type also in other
8748 sym
->ts
.type
= BT_CLASS
;
8749 attr
= CLASS_DATA (sym
)->attr
;
8751 attr
.associate_var
= 1;
8752 attr
.dimension
= attr
.codimension
= 0;
8753 attr
.class_pointer
= 1;
8754 if (!gfc_build_class_symbol (&sym
->ts
, &attr
, &as
))
8756 /* Make sure the _vptr is set. */
8757 c
= gfc_find_component (sym
->ts
.u
.derived
, "_vptr", true, true, NULL
);
8758 if (c
->ts
.u
.derived
== NULL
)
8759 c
->ts
.u
.derived
= gfc_find_derived_vtab (sym
->ts
.u
.derived
);
8760 CLASS_DATA (sym
)->attr
.pointer
= 1;
8761 CLASS_DATA (sym
)->attr
.class_pointer
= 1;
8762 gfc_set_sym_referenced (sym
->ts
.u
.derived
);
8763 gfc_commit_symbol (sym
->ts
.u
.derived
);
8764 /* _vptr now has the _vtab in it, change it to the _vtype. */
8765 if (c
->ts
.u
.derived
->attr
.vtab
)
8766 c
->ts
.u
.derived
= c
->ts
.u
.derived
->ts
.u
.derived
;
8767 c
->ts
.u
.derived
->ns
->types_resolved
= 0;
8768 resolve_types (c
->ts
.u
.derived
->ns
);
8772 /* Mark this as an associate variable. */
8773 sym
->attr
.associate_var
= 1;
8775 /* Fix up the type-spec for CHARACTER types. */
8776 if (sym
->ts
.type
== BT_CHARACTER
&& !sym
->attr
.select_type_temporary
)
8779 sym
->ts
.u
.cl
= target
->ts
.u
.cl
;
8781 if (sym
->ts
.deferred
&& target
->expr_type
== EXPR_VARIABLE
8782 && target
->symtree
->n
.sym
->attr
.dummy
8783 && sym
->ts
.u
.cl
== target
->ts
.u
.cl
)
8785 sym
->ts
.u
.cl
= gfc_new_charlen (sym
->ns
, NULL
);
8786 sym
->ts
.deferred
= 1;
8789 if (!sym
->ts
.u
.cl
->length
8790 && !sym
->ts
.deferred
8791 && target
->expr_type
== EXPR_CONSTANT
)
8793 sym
->ts
.u
.cl
->length
=
8794 gfc_get_int_expr (gfc_charlen_int_kind
, NULL
,
8795 target
->value
.character
.length
);
8797 else if ((!sym
->ts
.u
.cl
->length
8798 || sym
->ts
.u
.cl
->length
->expr_type
!= EXPR_CONSTANT
)
8799 && target
->expr_type
!= EXPR_VARIABLE
)
8801 sym
->ts
.u
.cl
= gfc_new_charlen (sym
->ns
, NULL
);
8802 sym
->ts
.deferred
= 1;
8804 /* This is reset in trans-stmt.c after the assignment
8805 of the target expression to the associate name. */
8806 sym
->attr
.allocatable
= 1;
8810 /* If the target is a good class object, so is the associate variable. */
8811 if (sym
->ts
.type
== BT_CLASS
&& gfc_expr_attr (target
).class_ok
)
8812 sym
->attr
.class_ok
= 1;
8816 /* Ensure that SELECT TYPE expressions have the correct rank and a full
8817 array reference, where necessary. The symbols are artificial and so
8818 the dimension attribute and arrayspec can also be set. In addition,
8819 sometimes the expr1 arrives as BT_DERIVED, when the symbol is BT_CLASS.
8820 This is corrected here as well.*/
8823 fixup_array_ref (gfc_expr
**expr1
, gfc_expr
*expr2
,
8824 int rank
, gfc_ref
*ref
)
8826 gfc_ref
*nref
= (*expr1
)->ref
;
8827 gfc_symbol
*sym1
= (*expr1
)->symtree
->n
.sym
;
8828 gfc_symbol
*sym2
= expr2
? expr2
->symtree
->n
.sym
: NULL
;
8829 (*expr1
)->rank
= rank
;
8830 if (sym1
->ts
.type
== BT_CLASS
)
8832 if ((*expr1
)->ts
.type
!= BT_CLASS
)
8833 (*expr1
)->ts
= sym1
->ts
;
8835 CLASS_DATA (sym1
)->attr
.dimension
= 1;
8836 if (CLASS_DATA (sym1
)->as
== NULL
&& sym2
)
8837 CLASS_DATA (sym1
)->as
8838 = gfc_copy_array_spec (CLASS_DATA (sym2
)->as
);
8842 sym1
->attr
.dimension
= 1;
8843 if (sym1
->as
== NULL
&& sym2
)
8844 sym1
->as
= gfc_copy_array_spec (sym2
->as
);
8847 for (; nref
; nref
= nref
->next
)
8848 if (nref
->next
== NULL
)
8851 if (ref
&& nref
&& nref
->type
!= REF_ARRAY
)
8852 nref
->next
= gfc_copy_ref (ref
);
8853 else if (ref
&& !nref
)
8854 (*expr1
)->ref
= gfc_copy_ref (ref
);
8859 build_loc_call (gfc_expr
*sym_expr
)
8862 loc_call
= gfc_get_expr ();
8863 loc_call
->expr_type
= EXPR_FUNCTION
;
8864 gfc_get_sym_tree ("_loc", gfc_current_ns
, &loc_call
->symtree
, false);
8865 loc_call
->symtree
->n
.sym
->attr
.flavor
= FL_PROCEDURE
;
8866 loc_call
->symtree
->n
.sym
->attr
.intrinsic
= 1;
8867 loc_call
->symtree
->n
.sym
->result
= loc_call
->symtree
->n
.sym
;
8868 gfc_commit_symbol (loc_call
->symtree
->n
.sym
);
8869 loc_call
->ts
.type
= BT_INTEGER
;
8870 loc_call
->ts
.kind
= gfc_index_integer_kind
;
8871 loc_call
->value
.function
.isym
= gfc_intrinsic_function_by_id (GFC_ISYM_LOC
);
8872 loc_call
->value
.function
.actual
= gfc_get_actual_arglist ();
8873 loc_call
->value
.function
.actual
->expr
= sym_expr
;
8874 loc_call
->where
= sym_expr
->where
;
8878 /* Resolve a SELECT TYPE statement. */
8881 resolve_select_type (gfc_code
*code
, gfc_namespace
*old_ns
)
8883 gfc_symbol
*selector_type
;
8884 gfc_code
*body
, *new_st
, *if_st
, *tail
;
8885 gfc_code
*class_is
= NULL
, *default_case
= NULL
;
8888 char name
[GFC_MAX_SYMBOL_LEN
];
8892 gfc_ref
* ref
= NULL
;
8893 gfc_expr
*selector_expr
= NULL
;
8895 ns
= code
->ext
.block
.ns
;
8898 /* Check for F03:C813. */
8899 if (code
->expr1
->ts
.type
!= BT_CLASS
8900 && !(code
->expr2
&& code
->expr2
->ts
.type
== BT_CLASS
))
8902 gfc_error ("Selector shall be polymorphic in SELECT TYPE statement "
8903 "at %L", &code
->loc
);
8907 if (!code
->expr1
->symtree
->n
.sym
->attr
.class_ok
)
8912 gfc_ref
*ref2
= NULL
;
8913 for (ref
= code
->expr2
->ref
; ref
!= NULL
; ref
= ref
->next
)
8914 if (ref
->type
== REF_COMPONENT
8915 && ref
->u
.c
.component
->ts
.type
== BT_CLASS
)
8920 if (code
->expr1
->symtree
->n
.sym
->attr
.untyped
)
8921 code
->expr1
->symtree
->n
.sym
->ts
= ref2
->u
.c
.component
->ts
;
8922 selector_type
= CLASS_DATA (ref2
->u
.c
.component
)->ts
.u
.derived
;
8926 if (code
->expr1
->symtree
->n
.sym
->attr
.untyped
)
8927 code
->expr1
->symtree
->n
.sym
->ts
= code
->expr2
->ts
;
8928 selector_type
= CLASS_DATA (code
->expr2
)->ts
.u
.derived
;
8931 if (code
->expr2
->rank
&& CLASS_DATA (code
->expr1
)->as
)
8932 CLASS_DATA (code
->expr1
)->as
->rank
= code
->expr2
->rank
;
8934 /* F2008: C803 The selector expression must not be coindexed. */
8935 if (gfc_is_coindexed (code
->expr2
))
8937 gfc_error ("Selector at %L must not be coindexed",
8938 &code
->expr2
->where
);
8945 selector_type
= CLASS_DATA (code
->expr1
)->ts
.u
.derived
;
8947 if (gfc_is_coindexed (code
->expr1
))
8949 gfc_error ("Selector at %L must not be coindexed",
8950 &code
->expr1
->where
);
8955 /* Loop over TYPE IS / CLASS IS cases. */
8956 for (body
= code
->block
; body
; body
= body
->block
)
8958 c
= body
->ext
.block
.case_list
;
8962 /* Check for repeated cases. */
8963 for (tail
= code
->block
; tail
; tail
= tail
->block
)
8965 gfc_case
*d
= tail
->ext
.block
.case_list
;
8969 if (c
->ts
.type
== d
->ts
.type
8970 && ((c
->ts
.type
== BT_DERIVED
8971 && c
->ts
.u
.derived
&& d
->ts
.u
.derived
8972 && !strcmp (c
->ts
.u
.derived
->name
,
8973 d
->ts
.u
.derived
->name
))
8974 || c
->ts
.type
== BT_UNKNOWN
8975 || (!(c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
8976 && c
->ts
.kind
== d
->ts
.kind
)))
8978 gfc_error ("TYPE IS at %L overlaps with TYPE IS at %L",
8979 &c
->where
, &d
->where
);
8985 /* Check F03:C815. */
8986 if ((c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
8987 && !selector_type
->attr
.unlimited_polymorphic
8988 && !gfc_type_is_extensible (c
->ts
.u
.derived
))
8990 gfc_error ("Derived type %qs at %L must be extensible",
8991 c
->ts
.u
.derived
->name
, &c
->where
);
8996 /* Check F03:C816. */
8997 if (c
->ts
.type
!= BT_UNKNOWN
&& !selector_type
->attr
.unlimited_polymorphic
8998 && ((c
->ts
.type
!= BT_DERIVED
&& c
->ts
.type
!= BT_CLASS
)
8999 || !gfc_type_is_extension_of (selector_type
, c
->ts
.u
.derived
)))
9001 if (c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
9002 gfc_error ("Derived type %qs at %L must be an extension of %qs",
9003 c
->ts
.u
.derived
->name
, &c
->where
, selector_type
->name
);
9005 gfc_error ("Unexpected intrinsic type %qs at %L",
9006 gfc_basic_typename (c
->ts
.type
), &c
->where
);
9011 /* Check F03:C814. */
9012 if (c
->ts
.type
== BT_CHARACTER
9013 && (c
->ts
.u
.cl
->length
!= NULL
|| c
->ts
.deferred
))
9015 gfc_error ("The type-spec at %L shall specify that each length "
9016 "type parameter is assumed", &c
->where
);
9021 /* Intercept the DEFAULT case. */
9022 if (c
->ts
.type
== BT_UNKNOWN
)
9024 /* Check F03:C818. */
9027 gfc_error ("The DEFAULT CASE at %L cannot be followed "
9028 "by a second DEFAULT CASE at %L",
9029 &default_case
->ext
.block
.case_list
->where
, &c
->where
);
9034 default_case
= body
;
9041 /* Transform SELECT TYPE statement to BLOCK and associate selector to
9042 target if present. If there are any EXIT statements referring to the
9043 SELECT TYPE construct, this is no problem because the gfc_code
9044 reference stays the same and EXIT is equally possible from the BLOCK
9045 it is changed to. */
9046 code
->op
= EXEC_BLOCK
;
9049 gfc_association_list
* assoc
;
9051 assoc
= gfc_get_association_list ();
9052 assoc
->st
= code
->expr1
->symtree
;
9053 assoc
->target
= gfc_copy_expr (code
->expr2
);
9054 assoc
->target
->where
= code
->expr2
->where
;
9055 /* assoc->variable will be set by resolve_assoc_var. */
9057 code
->ext
.block
.assoc
= assoc
;
9058 code
->expr1
->symtree
->n
.sym
->assoc
= assoc
;
9060 resolve_assoc_var (code
->expr1
->symtree
->n
.sym
, false);
9063 code
->ext
.block
.assoc
= NULL
;
9065 /* Ensure that the selector rank and arrayspec are available to
9066 correct expressions in which they might be missing. */
9067 if (code
->expr2
&& code
->expr2
->rank
)
9069 rank
= code
->expr2
->rank
;
9070 for (ref
= code
->expr2
->ref
; ref
; ref
= ref
->next
)
9071 if (ref
->next
== NULL
)
9073 if (ref
&& ref
->type
== REF_ARRAY
)
9074 ref
= gfc_copy_ref (ref
);
9076 /* Fixup expr1 if necessary. */
9078 fixup_array_ref (&code
->expr1
, code
->expr2
, rank
, ref
);
9080 else if (code
->expr1
->rank
)
9082 rank
= code
->expr1
->rank
;
9083 for (ref
= code
->expr1
->ref
; ref
; ref
= ref
->next
)
9084 if (ref
->next
== NULL
)
9086 if (ref
&& ref
->type
== REF_ARRAY
)
9087 ref
= gfc_copy_ref (ref
);
9090 /* Add EXEC_SELECT to switch on type. */
9091 new_st
= gfc_get_code (code
->op
);
9092 new_st
->expr1
= code
->expr1
;
9093 new_st
->expr2
= code
->expr2
;
9094 new_st
->block
= code
->block
;
9095 code
->expr1
= code
->expr2
= NULL
;
9100 ns
->code
->next
= new_st
;
9102 code
->op
= EXEC_SELECT_TYPE
;
9104 /* Use the intrinsic LOC function to generate an integer expression
9105 for the vtable of the selector. Note that the rank of the selector
9106 expression has to be set to zero. */
9107 gfc_add_vptr_component (code
->expr1
);
9108 code
->expr1
->rank
= 0;
9109 code
->expr1
= build_loc_call (code
->expr1
);
9110 selector_expr
= code
->expr1
->value
.function
.actual
->expr
;
9112 /* Loop over TYPE IS / CLASS IS cases. */
9113 for (body
= code
->block
; body
; body
= body
->block
)
9117 c
= body
->ext
.block
.case_list
;
9119 /* Generate an index integer expression for address of the
9120 TYPE/CLASS vtable and store it in c->low. The hash expression
9121 is stored in c->high and is used to resolve intrinsic cases. */
9122 if (c
->ts
.type
!= BT_UNKNOWN
)
9124 if (c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
9126 vtab
= gfc_find_derived_vtab (c
->ts
.u
.derived
);
9128 c
->high
= gfc_get_int_expr (gfc_integer_4_kind
, NULL
,
9129 c
->ts
.u
.derived
->hash_value
);
9133 vtab
= gfc_find_vtab (&c
->ts
);
9134 gcc_assert (vtab
&& CLASS_DATA (vtab
)->initializer
);
9135 e
= CLASS_DATA (vtab
)->initializer
;
9136 c
->high
= gfc_copy_expr (e
);
9137 if (c
->high
->ts
.kind
!= gfc_integer_4_kind
)
9140 ts
.kind
= gfc_integer_4_kind
;
9141 ts
.type
= BT_INTEGER
;
9142 gfc_convert_type_warn (c
->high
, &ts
, 2, 0);
9146 e
= gfc_lval_expr_from_sym (vtab
);
9147 c
->low
= build_loc_call (e
);
9152 /* Associate temporary to selector. This should only be done
9153 when this case is actually true, so build a new ASSOCIATE
9154 that does precisely this here (instead of using the
9157 if (c
->ts
.type
== BT_CLASS
)
9158 sprintf (name
, "__tmp_class_%s", c
->ts
.u
.derived
->name
);
9159 else if (c
->ts
.type
== BT_DERIVED
)
9160 sprintf (name
, "__tmp_type_%s", c
->ts
.u
.derived
->name
);
9161 else if (c
->ts
.type
== BT_CHARACTER
)
9163 HOST_WIDE_INT charlen
= 0;
9164 if (c
->ts
.u
.cl
&& c
->ts
.u
.cl
->length
9165 && c
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
)
9166 charlen
= gfc_mpz_get_hwi (c
->ts
.u
.cl
->length
->value
.integer
);
9167 snprintf (name
, sizeof (name
),
9168 "__tmp_%s_" HOST_WIDE_INT_PRINT_DEC
"_%d",
9169 gfc_basic_typename (c
->ts
.type
), charlen
, c
->ts
.kind
);
9172 sprintf (name
, "__tmp_%s_%d", gfc_basic_typename (c
->ts
.type
),
9175 st
= gfc_find_symtree (ns
->sym_root
, name
);
9176 gcc_assert (st
->n
.sym
->assoc
);
9177 st
->n
.sym
->assoc
->target
= gfc_get_variable_expr (selector_expr
->symtree
);
9178 st
->n
.sym
->assoc
->target
->where
= selector_expr
->where
;
9179 if (c
->ts
.type
!= BT_CLASS
&& c
->ts
.type
!= BT_UNKNOWN
)
9181 gfc_add_data_component (st
->n
.sym
->assoc
->target
);
9182 /* Fixup the target expression if necessary. */
9184 fixup_array_ref (&st
->n
.sym
->assoc
->target
, NULL
, rank
, ref
);
9187 new_st
= gfc_get_code (EXEC_BLOCK
);
9188 new_st
->ext
.block
.ns
= gfc_build_block_ns (ns
);
9189 new_st
->ext
.block
.ns
->code
= body
->next
;
9190 body
->next
= new_st
;
9192 /* Chain in the new list only if it is marked as dangling. Otherwise
9193 there is a CASE label overlap and this is already used. Just ignore,
9194 the error is diagnosed elsewhere. */
9195 if (st
->n
.sym
->assoc
->dangling
)
9197 new_st
->ext
.block
.assoc
= st
->n
.sym
->assoc
;
9198 st
->n
.sym
->assoc
->dangling
= 0;
9201 resolve_assoc_var (st
->n
.sym
, false);
9204 /* Take out CLASS IS cases for separate treatment. */
9206 while (body
&& body
->block
)
9208 if (body
->block
->ext
.block
.case_list
->ts
.type
== BT_CLASS
)
9210 /* Add to class_is list. */
9211 if (class_is
== NULL
)
9213 class_is
= body
->block
;
9218 for (tail
= class_is
; tail
->block
; tail
= tail
->block
) ;
9219 tail
->block
= body
->block
;
9222 /* Remove from EXEC_SELECT list. */
9223 body
->block
= body
->block
->block
;
9236 /* Add a default case to hold the CLASS IS cases. */
9237 for (tail
= code
; tail
->block
; tail
= tail
->block
) ;
9238 tail
->block
= gfc_get_code (EXEC_SELECT_TYPE
);
9240 tail
->ext
.block
.case_list
= gfc_get_case ();
9241 tail
->ext
.block
.case_list
->ts
.type
= BT_UNKNOWN
;
9243 default_case
= tail
;
9246 /* More than one CLASS IS block? */
9247 if (class_is
->block
)
9251 /* Sort CLASS IS blocks by extension level. */
9255 for (c1
= &class_is
; (*c1
) && (*c1
)->block
; c1
= &((*c1
)->block
))
9258 /* F03:C817 (check for doubles). */
9259 if ((*c1
)->ext
.block
.case_list
->ts
.u
.derived
->hash_value
9260 == c2
->ext
.block
.case_list
->ts
.u
.derived
->hash_value
)
9262 gfc_error ("Double CLASS IS block in SELECT TYPE "
9264 &c2
->ext
.block
.case_list
->where
);
9267 if ((*c1
)->ext
.block
.case_list
->ts
.u
.derived
->attr
.extension
9268 < c2
->ext
.block
.case_list
->ts
.u
.derived
->attr
.extension
)
9271 (*c1
)->block
= c2
->block
;
9281 /* Generate IF chain. */
9282 if_st
= gfc_get_code (EXEC_IF
);
9284 for (body
= class_is
; body
; body
= body
->block
)
9286 new_st
->block
= gfc_get_code (EXEC_IF
);
9287 new_st
= new_st
->block
;
9288 /* Set up IF condition: Call _gfortran_is_extension_of. */
9289 new_st
->expr1
= gfc_get_expr ();
9290 new_st
->expr1
->expr_type
= EXPR_FUNCTION
;
9291 new_st
->expr1
->ts
.type
= BT_LOGICAL
;
9292 new_st
->expr1
->ts
.kind
= 4;
9293 new_st
->expr1
->value
.function
.name
= gfc_get_string (PREFIX ("is_extension_of"));
9294 new_st
->expr1
->value
.function
.isym
= XCNEW (gfc_intrinsic_sym
);
9295 new_st
->expr1
->value
.function
.isym
->id
= GFC_ISYM_EXTENDS_TYPE_OF
;
9296 /* Set up arguments. */
9297 new_st
->expr1
->value
.function
.actual
= gfc_get_actual_arglist ();
9298 new_st
->expr1
->value
.function
.actual
->expr
= gfc_get_variable_expr (selector_expr
->symtree
);
9299 new_st
->expr1
->value
.function
.actual
->expr
->where
= code
->loc
;
9300 new_st
->expr1
->where
= code
->loc
;
9301 gfc_add_vptr_component (new_st
->expr1
->value
.function
.actual
->expr
);
9302 vtab
= gfc_find_derived_vtab (body
->ext
.block
.case_list
->ts
.u
.derived
);
9303 st
= gfc_find_symtree (vtab
->ns
->sym_root
, vtab
->name
);
9304 new_st
->expr1
->value
.function
.actual
->next
= gfc_get_actual_arglist ();
9305 new_st
->expr1
->value
.function
.actual
->next
->expr
= gfc_get_variable_expr (st
);
9306 new_st
->expr1
->value
.function
.actual
->next
->expr
->where
= code
->loc
;
9307 new_st
->next
= body
->next
;
9309 if (default_case
->next
)
9311 new_st
->block
= gfc_get_code (EXEC_IF
);
9312 new_st
= new_st
->block
;
9313 new_st
->next
= default_case
->next
;
9316 /* Replace CLASS DEFAULT code by the IF chain. */
9317 default_case
->next
= if_st
;
9320 /* Resolve the internal code. This cannot be done earlier because
9321 it requires that the sym->assoc of selectors is set already. */
9322 gfc_current_ns
= ns
;
9323 gfc_resolve_blocks (code
->block
, gfc_current_ns
);
9324 gfc_current_ns
= old_ns
;
9331 /* Resolve a transfer statement. This is making sure that:
9332 -- a derived type being transferred has only non-pointer components
9333 -- a derived type being transferred doesn't have private components, unless
9334 it's being transferred from the module where the type was defined
9335 -- we're not trying to transfer a whole assumed size array. */
9338 resolve_transfer (gfc_code
*code
)
9340 gfc_symbol
*sym
, *derived
;
9344 bool formatted
= false;
9345 gfc_dt
*dt
= code
->ext
.dt
;
9346 gfc_symbol
*dtio_sub
= NULL
;
9350 while (exp
!= NULL
&& exp
->expr_type
== EXPR_OP
9351 && exp
->value
.op
.op
== INTRINSIC_PARENTHESES
)
9352 exp
= exp
->value
.op
.op1
;
9354 if (exp
&& exp
->expr_type
== EXPR_NULL
9357 gfc_error ("Invalid context for NULL () intrinsic at %L",
9362 if (exp
== NULL
|| (exp
->expr_type
!= EXPR_VARIABLE
9363 && exp
->expr_type
!= EXPR_FUNCTION
9364 && exp
->expr_type
!= EXPR_STRUCTURE
))
9367 /* If we are reading, the variable will be changed. Note that
9368 code->ext.dt may be NULL if the TRANSFER is related to
9369 an INQUIRE statement -- but in this case, we are not reading, either. */
9370 if (dt
&& dt
->dt_io_kind
->value
.iokind
== M_READ
9371 && !gfc_check_vardef_context (exp
, false, false, false,
9375 const gfc_typespec
*ts
= exp
->expr_type
== EXPR_STRUCTURE
9376 || exp
->expr_type
== EXPR_FUNCTION
9377 ? &exp
->ts
: &exp
->symtree
->n
.sym
->ts
;
9379 /* Go to actual component transferred. */
9380 for (ref
= exp
->ref
; ref
; ref
= ref
->next
)
9381 if (ref
->type
== REF_COMPONENT
)
9382 ts
= &ref
->u
.c
.component
->ts
;
9384 if (dt
&& dt
->dt_io_kind
->value
.iokind
!= M_INQUIRE
9385 && (ts
->type
== BT_DERIVED
|| ts
->type
== BT_CLASS
))
9387 derived
= ts
->u
.derived
;
9389 /* Determine when to use the formatted DTIO procedure. */
9390 if (dt
&& (dt
->format_expr
|| dt
->format_label
))
9393 write
= dt
->dt_io_kind
->value
.iokind
== M_WRITE
9394 || dt
->dt_io_kind
->value
.iokind
== M_PRINT
;
9395 dtio_sub
= gfc_find_specific_dtio_proc (derived
, write
, formatted
);
9397 if (dtio_sub
!= NULL
&& exp
->expr_type
== EXPR_VARIABLE
)
9400 sym
= exp
->symtree
->n
.sym
->ns
->proc_name
;
9401 /* Check to see if this is a nested DTIO call, with the
9402 dummy as the io-list object. */
9403 if (sym
&& sym
== dtio_sub
&& sym
->formal
9404 && sym
->formal
->sym
== exp
->symtree
->n
.sym
9405 && exp
->ref
== NULL
)
9407 if (!sym
->attr
.recursive
)
9409 gfc_error ("DTIO %s procedure at %L must be recursive",
9410 sym
->name
, &sym
->declared_at
);
9417 if (ts
->type
== BT_CLASS
&& dtio_sub
== NULL
)
9419 gfc_error ("Data transfer element at %L cannot be polymorphic unless "
9420 "it is processed by a defined input/output procedure",
9425 if (ts
->type
== BT_DERIVED
)
9427 /* Check that transferred derived type doesn't contain POINTER
9428 components unless it is processed by a defined input/output
9430 if (ts
->u
.derived
->attr
.pointer_comp
&& dtio_sub
== NULL
)
9432 gfc_error ("Data transfer element at %L cannot have POINTER "
9433 "components unless it is processed by a defined "
9434 "input/output procedure", &code
->loc
);
9439 if (ts
->u
.derived
->attr
.proc_pointer_comp
)
9441 gfc_error ("Data transfer element at %L cannot have "
9442 "procedure pointer components", &code
->loc
);
9446 if (ts
->u
.derived
->attr
.alloc_comp
&& dtio_sub
== NULL
)
9448 gfc_error ("Data transfer element at %L cannot have ALLOCATABLE "
9449 "components unless it is processed by a defined "
9450 "input/output procedure", &code
->loc
);
9454 /* C_PTR and C_FUNPTR have private components which means they cannot
9455 be printed. However, if -std=gnu and not -pedantic, allow
9456 the component to be printed to help debugging. */
9457 if (ts
->u
.derived
->ts
.f90_type
== BT_VOID
)
9459 if (!gfc_notify_std (GFC_STD_GNU
, "Data transfer element at %L "
9460 "cannot have PRIVATE components", &code
->loc
))
9463 else if (derived_inaccessible (ts
->u
.derived
) && dtio_sub
== NULL
)
9465 gfc_error ("Data transfer element at %L cannot have "
9466 "PRIVATE components unless it is processed by "
9467 "a defined input/output procedure", &code
->loc
);
9472 if (exp
->expr_type
== EXPR_STRUCTURE
)
9475 sym
= exp
->symtree
->n
.sym
;
9477 if (sym
->as
!= NULL
&& sym
->as
->type
== AS_ASSUMED_SIZE
&& exp
->ref
9478 && exp
->ref
->type
== REF_ARRAY
&& exp
->ref
->u
.ar
.type
== AR_FULL
)
9480 gfc_error ("Data transfer element at %L cannot be a full reference to "
9481 "an assumed-size array", &code
->loc
);
9485 if (async_io_dt
&& exp
->expr_type
== EXPR_VARIABLE
)
9486 exp
->symtree
->n
.sym
->attr
.asynchronous
= 1;
9490 /*********** Toplevel code resolution subroutines ***********/
9492 /* Find the set of labels that are reachable from this block. We also
9493 record the last statement in each block. */
9496 find_reachable_labels (gfc_code
*block
)
9503 cs_base
->reachable_labels
= bitmap_alloc (&labels_obstack
);
9505 /* Collect labels in this block. We don't keep those corresponding
9506 to END {IF|SELECT}, these are checked in resolve_branch by going
9507 up through the code_stack. */
9508 for (c
= block
; c
; c
= c
->next
)
9510 if (c
->here
&& c
->op
!= EXEC_END_NESTED_BLOCK
)
9511 bitmap_set_bit (cs_base
->reachable_labels
, c
->here
->value
);
9514 /* Merge with labels from parent block. */
9517 gcc_assert (cs_base
->prev
->reachable_labels
);
9518 bitmap_ior_into (cs_base
->reachable_labels
,
9519 cs_base
->prev
->reachable_labels
);
9525 resolve_lock_unlock_event (gfc_code
*code
)
9527 if (code
->expr1
->expr_type
== EXPR_FUNCTION
9528 && code
->expr1
->value
.function
.isym
9529 && code
->expr1
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
)
9530 remove_caf_get_intrinsic (code
->expr1
);
9532 if ((code
->op
== EXEC_LOCK
|| code
->op
== EXEC_UNLOCK
)
9533 && (code
->expr1
->ts
.type
!= BT_DERIVED
9534 || code
->expr1
->expr_type
!= EXPR_VARIABLE
9535 || code
->expr1
->ts
.u
.derived
->from_intmod
!= INTMOD_ISO_FORTRAN_ENV
9536 || code
->expr1
->ts
.u
.derived
->intmod_sym_id
!= ISOFORTRAN_LOCK_TYPE
9537 || code
->expr1
->rank
!= 0
9538 || (!gfc_is_coarray (code
->expr1
) &&
9539 !gfc_is_coindexed (code
->expr1
))))
9540 gfc_error ("Lock variable at %L must be a scalar of type LOCK_TYPE",
9541 &code
->expr1
->where
);
9542 else if ((code
->op
== EXEC_EVENT_POST
|| code
->op
== EXEC_EVENT_WAIT
)
9543 && (code
->expr1
->ts
.type
!= BT_DERIVED
9544 || code
->expr1
->expr_type
!= EXPR_VARIABLE
9545 || code
->expr1
->ts
.u
.derived
->from_intmod
9546 != INTMOD_ISO_FORTRAN_ENV
9547 || code
->expr1
->ts
.u
.derived
->intmod_sym_id
9548 != ISOFORTRAN_EVENT_TYPE
9549 || code
->expr1
->rank
!= 0))
9550 gfc_error ("Event variable at %L must be a scalar of type EVENT_TYPE",
9551 &code
->expr1
->where
);
9552 else if (code
->op
== EXEC_EVENT_POST
&& !gfc_is_coarray (code
->expr1
)
9553 && !gfc_is_coindexed (code
->expr1
))
9554 gfc_error ("Event variable argument at %L must be a coarray or coindexed",
9555 &code
->expr1
->where
);
9556 else if (code
->op
== EXEC_EVENT_WAIT
&& !gfc_is_coarray (code
->expr1
))
9557 gfc_error ("Event variable argument at %L must be a coarray but not "
9558 "coindexed", &code
->expr1
->where
);
9562 && (code
->expr2
->ts
.type
!= BT_INTEGER
|| code
->expr2
->rank
!= 0
9563 || code
->expr2
->expr_type
!= EXPR_VARIABLE
))
9564 gfc_error ("STAT= argument at %L must be a scalar INTEGER variable",
9565 &code
->expr2
->where
);
9568 && !gfc_check_vardef_context (code
->expr2
, false, false, false,
9569 _("STAT variable")))
9574 && (code
->expr3
->ts
.type
!= BT_CHARACTER
|| code
->expr3
->rank
!= 0
9575 || code
->expr3
->expr_type
!= EXPR_VARIABLE
))
9576 gfc_error ("ERRMSG= argument at %L must be a scalar CHARACTER variable",
9577 &code
->expr3
->where
);
9580 && !gfc_check_vardef_context (code
->expr3
, false, false, false,
9581 _("ERRMSG variable")))
9584 /* Check for LOCK the ACQUIRED_LOCK. */
9585 if (code
->op
!= EXEC_EVENT_WAIT
&& code
->expr4
9586 && (code
->expr4
->ts
.type
!= BT_LOGICAL
|| code
->expr4
->rank
!= 0
9587 || code
->expr4
->expr_type
!= EXPR_VARIABLE
))
9588 gfc_error ("ACQUIRED_LOCK= argument at %L must be a scalar LOGICAL "
9589 "variable", &code
->expr4
->where
);
9591 if (code
->op
!= EXEC_EVENT_WAIT
&& code
->expr4
9592 && !gfc_check_vardef_context (code
->expr4
, false, false, false,
9593 _("ACQUIRED_LOCK variable")))
9596 /* Check for EVENT WAIT the UNTIL_COUNT. */
9597 if (code
->op
== EXEC_EVENT_WAIT
&& code
->expr4
)
9599 if (!gfc_resolve_expr (code
->expr4
) || code
->expr4
->ts
.type
!= BT_INTEGER
9600 || code
->expr4
->rank
!= 0)
9601 gfc_error ("UNTIL_COUNT= argument at %L must be a scalar INTEGER "
9602 "expression", &code
->expr4
->where
);
9608 resolve_critical (gfc_code
*code
)
9610 gfc_symtree
*symtree
;
9611 gfc_symbol
*lock_type
;
9612 char name
[GFC_MAX_SYMBOL_LEN
];
9613 static int serial
= 0;
9615 if (flag_coarray
!= GFC_FCOARRAY_LIB
)
9618 symtree
= gfc_find_symtree (gfc_current_ns
->sym_root
,
9619 GFC_PREFIX ("lock_type"));
9621 lock_type
= symtree
->n
.sym
;
9624 if (gfc_get_sym_tree (GFC_PREFIX ("lock_type"), gfc_current_ns
, &symtree
,
9627 lock_type
= symtree
->n
.sym
;
9628 lock_type
->attr
.flavor
= FL_DERIVED
;
9629 lock_type
->attr
.zero_comp
= 1;
9630 lock_type
->from_intmod
= INTMOD_ISO_FORTRAN_ENV
;
9631 lock_type
->intmod_sym_id
= ISOFORTRAN_LOCK_TYPE
;
9634 sprintf(name
, GFC_PREFIX ("lock_var") "%d",serial
++);
9635 if (gfc_get_sym_tree (name
, gfc_current_ns
, &symtree
, false) != 0)
9638 code
->resolved_sym
= symtree
->n
.sym
;
9639 symtree
->n
.sym
->attr
.flavor
= FL_VARIABLE
;
9640 symtree
->n
.sym
->attr
.referenced
= 1;
9641 symtree
->n
.sym
->attr
.artificial
= 1;
9642 symtree
->n
.sym
->attr
.codimension
= 1;
9643 symtree
->n
.sym
->ts
.type
= BT_DERIVED
;
9644 symtree
->n
.sym
->ts
.u
.derived
= lock_type
;
9645 symtree
->n
.sym
->as
= gfc_get_array_spec ();
9646 symtree
->n
.sym
->as
->corank
= 1;
9647 symtree
->n
.sym
->as
->type
= AS_EXPLICIT
;
9648 symtree
->n
.sym
->as
->cotype
= AS_EXPLICIT
;
9649 symtree
->n
.sym
->as
->lower
[0] = gfc_get_int_expr (gfc_default_integer_kind
,
9651 gfc_commit_symbols();
9656 resolve_sync (gfc_code
*code
)
9658 /* Check imageset. The * case matches expr1 == NULL. */
9661 if (code
->expr1
->ts
.type
!= BT_INTEGER
|| code
->expr1
->rank
> 1)
9662 gfc_error ("Imageset argument at %L must be a scalar or rank-1 "
9663 "INTEGER expression", &code
->expr1
->where
);
9664 if (code
->expr1
->expr_type
== EXPR_CONSTANT
&& code
->expr1
->rank
== 0
9665 && mpz_cmp_si (code
->expr1
->value
.integer
, 1) < 0)
9666 gfc_error ("Imageset argument at %L must between 1 and num_images()",
9667 &code
->expr1
->where
);
9668 else if (code
->expr1
->expr_type
== EXPR_ARRAY
9669 && gfc_simplify_expr (code
->expr1
, 0))
9671 gfc_constructor
*cons
;
9672 cons
= gfc_constructor_first (code
->expr1
->value
.constructor
);
9673 for (; cons
; cons
= gfc_constructor_next (cons
))
9674 if (cons
->expr
->expr_type
== EXPR_CONSTANT
9675 && mpz_cmp_si (cons
->expr
->value
.integer
, 1) < 0)
9676 gfc_error ("Imageset argument at %L must between 1 and "
9677 "num_images()", &cons
->expr
->where
);
9682 gfc_resolve_expr (code
->expr2
);
9684 && (code
->expr2
->ts
.type
!= BT_INTEGER
|| code
->expr2
->rank
!= 0
9685 || code
->expr2
->expr_type
!= EXPR_VARIABLE
))
9686 gfc_error ("STAT= argument at %L must be a scalar INTEGER variable",
9687 &code
->expr2
->where
);
9690 gfc_resolve_expr (code
->expr3
);
9692 && (code
->expr3
->ts
.type
!= BT_CHARACTER
|| code
->expr3
->rank
!= 0
9693 || code
->expr3
->expr_type
!= EXPR_VARIABLE
))
9694 gfc_error ("ERRMSG= argument at %L must be a scalar CHARACTER variable",
9695 &code
->expr3
->where
);
9699 /* Given a branch to a label, see if the branch is conforming.
9700 The code node describes where the branch is located. */
9703 resolve_branch (gfc_st_label
*label
, gfc_code
*code
)
9710 /* Step one: is this a valid branching target? */
9712 if (label
->defined
== ST_LABEL_UNKNOWN
)
9714 gfc_error ("Label %d referenced at %L is never defined", label
->value
,
9719 if (label
->defined
!= ST_LABEL_TARGET
&& label
->defined
!= ST_LABEL_DO_TARGET
)
9721 gfc_error ("Statement at %L is not a valid branch target statement "
9722 "for the branch statement at %L", &label
->where
, &code
->loc
);
9726 /* Step two: make sure this branch is not a branch to itself ;-) */
9728 if (code
->here
== label
)
9731 "Branch at %L may result in an infinite loop", &code
->loc
);
9735 /* Step three: See if the label is in the same block as the
9736 branching statement. The hard work has been done by setting up
9737 the bitmap reachable_labels. */
9739 if (bitmap_bit_p (cs_base
->reachable_labels
, label
->value
))
9741 /* Check now whether there is a CRITICAL construct; if so, check
9742 whether the label is still visible outside of the CRITICAL block,
9743 which is invalid. */
9744 for (stack
= cs_base
; stack
; stack
= stack
->prev
)
9746 if (stack
->current
->op
== EXEC_CRITICAL
9747 && bitmap_bit_p (stack
->reachable_labels
, label
->value
))
9748 gfc_error ("GOTO statement at %L leaves CRITICAL construct for "
9749 "label at %L", &code
->loc
, &label
->where
);
9750 else if (stack
->current
->op
== EXEC_DO_CONCURRENT
9751 && bitmap_bit_p (stack
->reachable_labels
, label
->value
))
9752 gfc_error ("GOTO statement at %L leaves DO CONCURRENT construct "
9753 "for label at %L", &code
->loc
, &label
->where
);
9759 /* Step four: If we haven't found the label in the bitmap, it may
9760 still be the label of the END of the enclosing block, in which
9761 case we find it by going up the code_stack. */
9763 for (stack
= cs_base
; stack
; stack
= stack
->prev
)
9765 if (stack
->current
->next
&& stack
->current
->next
->here
== label
)
9767 if (stack
->current
->op
== EXEC_CRITICAL
)
9769 /* Note: A label at END CRITICAL does not leave the CRITICAL
9770 construct as END CRITICAL is still part of it. */
9771 gfc_error ("GOTO statement at %L leaves CRITICAL construct for label"
9772 " at %L", &code
->loc
, &label
->where
);
9775 else if (stack
->current
->op
== EXEC_DO_CONCURRENT
)
9777 gfc_error ("GOTO statement at %L leaves DO CONCURRENT construct for "
9778 "label at %L", &code
->loc
, &label
->where
);
9785 gcc_assert (stack
->current
->next
->op
== EXEC_END_NESTED_BLOCK
);
9789 /* The label is not in an enclosing block, so illegal. This was
9790 allowed in Fortran 66, so we allow it as extension. No
9791 further checks are necessary in this case. */
9792 gfc_notify_std (GFC_STD_LEGACY
, "Label at %L is not in the same block "
9793 "as the GOTO statement at %L", &label
->where
,
9799 /* Check whether EXPR1 has the same shape as EXPR2. */
9802 resolve_where_shape (gfc_expr
*expr1
, gfc_expr
*expr2
)
9804 mpz_t shape
[GFC_MAX_DIMENSIONS
];
9805 mpz_t shape2
[GFC_MAX_DIMENSIONS
];
9806 bool result
= false;
9809 /* Compare the rank. */
9810 if (expr1
->rank
!= expr2
->rank
)
9813 /* Compare the size of each dimension. */
9814 for (i
=0; i
<expr1
->rank
; i
++)
9816 if (!gfc_array_dimen_size (expr1
, i
, &shape
[i
]))
9819 if (!gfc_array_dimen_size (expr2
, i
, &shape2
[i
]))
9822 if (mpz_cmp (shape
[i
], shape2
[i
]))
9826 /* When either of the two expression is an assumed size array, we
9827 ignore the comparison of dimension sizes. */
9832 gfc_clear_shape (shape
, i
);
9833 gfc_clear_shape (shape2
, i
);
9838 /* Check whether a WHERE assignment target or a WHERE mask expression
9839 has the same shape as the outmost WHERE mask expression. */
9842 resolve_where (gfc_code
*code
, gfc_expr
*mask
)
9848 cblock
= code
->block
;
9850 /* Store the first WHERE mask-expr of the WHERE statement or construct.
9851 In case of nested WHERE, only the outmost one is stored. */
9852 if (mask
== NULL
) /* outmost WHERE */
9854 else /* inner WHERE */
9861 /* Check if the mask-expr has a consistent shape with the
9862 outmost WHERE mask-expr. */
9863 if (!resolve_where_shape (cblock
->expr1
, e
))
9864 gfc_error ("WHERE mask at %L has inconsistent shape",
9865 &cblock
->expr1
->where
);
9868 /* the assignment statement of a WHERE statement, or the first
9869 statement in where-body-construct of a WHERE construct */
9870 cnext
= cblock
->next
;
9875 /* WHERE assignment statement */
9878 /* Check shape consistent for WHERE assignment target. */
9879 if (e
&& !resolve_where_shape (cnext
->expr1
, e
))
9880 gfc_error ("WHERE assignment target at %L has "
9881 "inconsistent shape", &cnext
->expr1
->where
);
9885 case EXEC_ASSIGN_CALL
:
9886 resolve_call (cnext
);
9887 if (!cnext
->resolved_sym
->attr
.elemental
)
9888 gfc_error("Non-ELEMENTAL user-defined assignment in WHERE at %L",
9889 &cnext
->ext
.actual
->expr
->where
);
9892 /* WHERE or WHERE construct is part of a where-body-construct */
9894 resolve_where (cnext
, e
);
9898 gfc_error ("Unsupported statement inside WHERE at %L",
9901 /* the next statement within the same where-body-construct */
9902 cnext
= cnext
->next
;
9904 /* the next masked-elsewhere-stmt, elsewhere-stmt, or end-where-stmt */
9905 cblock
= cblock
->block
;
9910 /* Resolve assignment in FORALL construct.
9911 NVAR is the number of FORALL index variables, and VAR_EXPR records the
9912 FORALL index variables. */
9915 gfc_resolve_assign_in_forall (gfc_code
*code
, int nvar
, gfc_expr
**var_expr
)
9919 for (n
= 0; n
< nvar
; n
++)
9921 gfc_symbol
*forall_index
;
9923 forall_index
= var_expr
[n
]->symtree
->n
.sym
;
9925 /* Check whether the assignment target is one of the FORALL index
9927 if ((code
->expr1
->expr_type
== EXPR_VARIABLE
)
9928 && (code
->expr1
->symtree
->n
.sym
== forall_index
))
9929 gfc_error ("Assignment to a FORALL index variable at %L",
9930 &code
->expr1
->where
);
9933 /* If one of the FORALL index variables doesn't appear in the
9934 assignment variable, then there could be a many-to-one
9935 assignment. Emit a warning rather than an error because the
9936 mask could be resolving this problem. */
9937 if (!find_forall_index (code
->expr1
, forall_index
, 0))
9938 gfc_warning (0, "The FORALL with index %qs is not used on the "
9939 "left side of the assignment at %L and so might "
9940 "cause multiple assignment to this object",
9941 var_expr
[n
]->symtree
->name
, &code
->expr1
->where
);
9947 /* Resolve WHERE statement in FORALL construct. */
9950 gfc_resolve_where_code_in_forall (gfc_code
*code
, int nvar
,
9951 gfc_expr
**var_expr
)
9956 cblock
= code
->block
;
9959 /* the assignment statement of a WHERE statement, or the first
9960 statement in where-body-construct of a WHERE construct */
9961 cnext
= cblock
->next
;
9966 /* WHERE assignment statement */
9968 gfc_resolve_assign_in_forall (cnext
, nvar
, var_expr
);
9971 /* WHERE operator assignment statement */
9972 case EXEC_ASSIGN_CALL
:
9973 resolve_call (cnext
);
9974 if (!cnext
->resolved_sym
->attr
.elemental
)
9975 gfc_error("Non-ELEMENTAL user-defined assignment in WHERE at %L",
9976 &cnext
->ext
.actual
->expr
->where
);
9979 /* WHERE or WHERE construct is part of a where-body-construct */
9981 gfc_resolve_where_code_in_forall (cnext
, nvar
, var_expr
);
9985 gfc_error ("Unsupported statement inside WHERE at %L",
9988 /* the next statement within the same where-body-construct */
9989 cnext
= cnext
->next
;
9991 /* the next masked-elsewhere-stmt, elsewhere-stmt, or end-where-stmt */
9992 cblock
= cblock
->block
;
9997 /* Traverse the FORALL body to check whether the following errors exist:
9998 1. For assignment, check if a many-to-one assignment happens.
9999 2. For WHERE statement, check the WHERE body to see if there is any
10000 many-to-one assignment. */
10003 gfc_resolve_forall_body (gfc_code
*code
, int nvar
, gfc_expr
**var_expr
)
10007 c
= code
->block
->next
;
10013 case EXEC_POINTER_ASSIGN
:
10014 gfc_resolve_assign_in_forall (c
, nvar
, var_expr
);
10017 case EXEC_ASSIGN_CALL
:
10021 /* Because the gfc_resolve_blocks() will handle the nested FORALL,
10022 there is no need to handle it here. */
10026 gfc_resolve_where_code_in_forall(c
, nvar
, var_expr
);
10031 /* The next statement in the FORALL body. */
10037 /* Counts the number of iterators needed inside a forall construct, including
10038 nested forall constructs. This is used to allocate the needed memory
10039 in gfc_resolve_forall. */
10042 gfc_count_forall_iterators (gfc_code
*code
)
10044 int max_iters
, sub_iters
, current_iters
;
10045 gfc_forall_iterator
*fa
;
10047 gcc_assert(code
->op
== EXEC_FORALL
);
10051 for (fa
= code
->ext
.forall_iterator
; fa
; fa
= fa
->next
)
10054 code
= code
->block
->next
;
10058 if (code
->op
== EXEC_FORALL
)
10060 sub_iters
= gfc_count_forall_iterators (code
);
10061 if (sub_iters
> max_iters
)
10062 max_iters
= sub_iters
;
10067 return current_iters
+ max_iters
;
10071 /* Given a FORALL construct, first resolve the FORALL iterator, then call
10072 gfc_resolve_forall_body to resolve the FORALL body. */
10075 gfc_resolve_forall (gfc_code
*code
, gfc_namespace
*ns
, int forall_save
)
10077 static gfc_expr
**var_expr
;
10078 static int total_var
= 0;
10079 static int nvar
= 0;
10080 int i
, old_nvar
, tmp
;
10081 gfc_forall_iterator
*fa
;
10085 if (!gfc_notify_std (GFC_STD_F2018_OBS
, "FORALL construct at %L", &code
->loc
))
10088 /* Start to resolve a FORALL construct */
10089 if (forall_save
== 0)
10091 /* Count the total number of FORALL indices in the nested FORALL
10092 construct in order to allocate the VAR_EXPR with proper size. */
10093 total_var
= gfc_count_forall_iterators (code
);
10095 /* Allocate VAR_EXPR with NUMBER_OF_FORALL_INDEX elements. */
10096 var_expr
= XCNEWVEC (gfc_expr
*, total_var
);
10099 /* The information about FORALL iterator, including FORALL indices start, end
10100 and stride. An outer FORALL indice cannot appear in start, end or stride. */
10101 for (fa
= code
->ext
.forall_iterator
; fa
; fa
= fa
->next
)
10103 /* Fortran 20008: C738 (R753). */
10104 if (fa
->var
->ref
&& fa
->var
->ref
->type
== REF_ARRAY
)
10106 gfc_error ("FORALL index-name at %L must be a scalar variable "
10107 "of type integer", &fa
->var
->where
);
10111 /* Check if any outer FORALL index name is the same as the current
10113 for (i
= 0; i
< nvar
; i
++)
10115 if (fa
->var
->symtree
->n
.sym
== var_expr
[i
]->symtree
->n
.sym
)
10116 gfc_error ("An outer FORALL construct already has an index "
10117 "with this name %L", &fa
->var
->where
);
10120 /* Record the current FORALL index. */
10121 var_expr
[nvar
] = gfc_copy_expr (fa
->var
);
10125 /* No memory leak. */
10126 gcc_assert (nvar
<= total_var
);
10129 /* Resolve the FORALL body. */
10130 gfc_resolve_forall_body (code
, nvar
, var_expr
);
10132 /* May call gfc_resolve_forall to resolve the inner FORALL loop. */
10133 gfc_resolve_blocks (code
->block
, ns
);
10137 /* Free only the VAR_EXPRs allocated in this frame. */
10138 for (i
= nvar
; i
< tmp
; i
++)
10139 gfc_free_expr (var_expr
[i
]);
10143 /* We are in the outermost FORALL construct. */
10144 gcc_assert (forall_save
== 0);
10146 /* VAR_EXPR is not needed any more. */
10153 /* Resolve a BLOCK construct statement. */
10156 resolve_block_construct (gfc_code
* code
)
10158 /* Resolve the BLOCK's namespace. */
10159 gfc_resolve (code
->ext
.block
.ns
);
10161 /* For an ASSOCIATE block, the associations (and their targets) are already
10162 resolved during resolve_symbol. */
10166 /* Resolve lists of blocks found in IF, SELECT CASE, WHERE, FORALL, GOTO and
10170 gfc_resolve_blocks (gfc_code
*b
, gfc_namespace
*ns
)
10174 for (; b
; b
= b
->block
)
10176 t
= gfc_resolve_expr (b
->expr1
);
10177 if (!gfc_resolve_expr (b
->expr2
))
10183 if (t
&& b
->expr1
!= NULL
10184 && (b
->expr1
->ts
.type
!= BT_LOGICAL
|| b
->expr1
->rank
!= 0))
10185 gfc_error ("IF clause at %L requires a scalar LOGICAL expression",
10191 && b
->expr1
!= NULL
10192 && (b
->expr1
->ts
.type
!= BT_LOGICAL
|| b
->expr1
->rank
== 0))
10193 gfc_error ("WHERE/ELSEWHERE clause at %L requires a LOGICAL array",
10198 resolve_branch (b
->label1
, b
);
10202 resolve_block_construct (b
);
10206 case EXEC_SELECT_TYPE
:
10209 case EXEC_DO_WHILE
:
10210 case EXEC_DO_CONCURRENT
:
10211 case EXEC_CRITICAL
:
10214 case EXEC_IOLENGTH
:
10218 case EXEC_OMP_ATOMIC
:
10219 case EXEC_OACC_ATOMIC
:
10221 gfc_omp_atomic_op aop
10222 = (gfc_omp_atomic_op
) (b
->ext
.omp_atomic
& GFC_OMP_ATOMIC_MASK
);
10224 /* Verify this before calling gfc_resolve_code, which might
10226 gcc_assert (b
->next
&& b
->next
->op
== EXEC_ASSIGN
);
10227 gcc_assert (((aop
!= GFC_OMP_ATOMIC_CAPTURE
)
10228 && b
->next
->next
== NULL
)
10229 || ((aop
== GFC_OMP_ATOMIC_CAPTURE
)
10230 && b
->next
->next
!= NULL
10231 && b
->next
->next
->op
== EXEC_ASSIGN
10232 && b
->next
->next
->next
== NULL
));
10236 case EXEC_OACC_PARALLEL_LOOP
:
10237 case EXEC_OACC_PARALLEL
:
10238 case EXEC_OACC_KERNELS_LOOP
:
10239 case EXEC_OACC_KERNELS
:
10240 case EXEC_OACC_DATA
:
10241 case EXEC_OACC_HOST_DATA
:
10242 case EXEC_OACC_LOOP
:
10243 case EXEC_OACC_UPDATE
:
10244 case EXEC_OACC_WAIT
:
10245 case EXEC_OACC_CACHE
:
10246 case EXEC_OACC_ENTER_DATA
:
10247 case EXEC_OACC_EXIT_DATA
:
10248 case EXEC_OACC_ROUTINE
:
10249 case EXEC_OMP_CRITICAL
:
10250 case EXEC_OMP_DISTRIBUTE
:
10251 case EXEC_OMP_DISTRIBUTE_PARALLEL_DO
:
10252 case EXEC_OMP_DISTRIBUTE_PARALLEL_DO_SIMD
:
10253 case EXEC_OMP_DISTRIBUTE_SIMD
:
10255 case EXEC_OMP_DO_SIMD
:
10256 case EXEC_OMP_MASTER
:
10257 case EXEC_OMP_ORDERED
:
10258 case EXEC_OMP_PARALLEL
:
10259 case EXEC_OMP_PARALLEL_DO
:
10260 case EXEC_OMP_PARALLEL_DO_SIMD
:
10261 case EXEC_OMP_PARALLEL_SECTIONS
:
10262 case EXEC_OMP_PARALLEL_WORKSHARE
:
10263 case EXEC_OMP_SECTIONS
:
10264 case EXEC_OMP_SIMD
:
10265 case EXEC_OMP_SINGLE
:
10266 case EXEC_OMP_TARGET
:
10267 case EXEC_OMP_TARGET_DATA
:
10268 case EXEC_OMP_TARGET_ENTER_DATA
:
10269 case EXEC_OMP_TARGET_EXIT_DATA
:
10270 case EXEC_OMP_TARGET_PARALLEL
:
10271 case EXEC_OMP_TARGET_PARALLEL_DO
:
10272 case EXEC_OMP_TARGET_PARALLEL_DO_SIMD
:
10273 case EXEC_OMP_TARGET_SIMD
:
10274 case EXEC_OMP_TARGET_TEAMS
:
10275 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE
:
10276 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO
:
10277 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
10278 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_SIMD
:
10279 case EXEC_OMP_TARGET_UPDATE
:
10280 case EXEC_OMP_TASK
:
10281 case EXEC_OMP_TASKGROUP
:
10282 case EXEC_OMP_TASKLOOP
:
10283 case EXEC_OMP_TASKLOOP_SIMD
:
10284 case EXEC_OMP_TASKWAIT
:
10285 case EXEC_OMP_TASKYIELD
:
10286 case EXEC_OMP_TEAMS
:
10287 case EXEC_OMP_TEAMS_DISTRIBUTE
:
10288 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO
:
10289 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
10290 case EXEC_OMP_TEAMS_DISTRIBUTE_SIMD
:
10291 case EXEC_OMP_WORKSHARE
:
10295 gfc_internal_error ("gfc_resolve_blocks(): Bad block type");
10298 gfc_resolve_code (b
->next
, ns
);
10303 /* Does everything to resolve an ordinary assignment. Returns true
10304 if this is an interface assignment. */
10306 resolve_ordinary_assign (gfc_code
*code
, gfc_namespace
*ns
)
10313 symbol_attribute attr
;
10315 if (gfc_extend_assign (code
, ns
))
10319 if (code
->op
== EXEC_ASSIGN_CALL
)
10321 lhs
= code
->ext
.actual
->expr
;
10322 rhsptr
= &code
->ext
.actual
->next
->expr
;
10326 gfc_actual_arglist
* args
;
10327 gfc_typebound_proc
* tbp
;
10329 gcc_assert (code
->op
== EXEC_COMPCALL
);
10331 args
= code
->expr1
->value
.compcall
.actual
;
10333 rhsptr
= &args
->next
->expr
;
10335 tbp
= code
->expr1
->value
.compcall
.tbp
;
10336 gcc_assert (!tbp
->is_generic
);
10339 /* Make a temporary rhs when there is a default initializer
10340 and rhs is the same symbol as the lhs. */
10341 if ((*rhsptr
)->expr_type
== EXPR_VARIABLE
10342 && (*rhsptr
)->symtree
->n
.sym
->ts
.type
== BT_DERIVED
10343 && gfc_has_default_initializer ((*rhsptr
)->symtree
->n
.sym
->ts
.u
.derived
)
10344 && (lhs
->symtree
->n
.sym
== (*rhsptr
)->symtree
->n
.sym
))
10345 *rhsptr
= gfc_get_parentheses (*rhsptr
);
10354 && !gfc_notify_std (GFC_STD_GNU
, "BOZ literal at %L outside "
10355 "a DATA statement and outside INT/REAL/DBLE/CMPLX",
10359 /* Handle the case of a BOZ literal on the RHS. */
10360 if (rhs
->is_boz
&& lhs
->ts
.type
!= BT_INTEGER
)
10363 if (warn_surprising
)
10364 gfc_warning (OPT_Wsurprising
,
10365 "BOZ literal at %L is bitwise transferred "
10366 "non-integer symbol %qs", &code
->loc
,
10367 lhs
->symtree
->n
.sym
->name
);
10369 if (!gfc_convert_boz (rhs
, &lhs
->ts
))
10371 if ((rc
= gfc_range_check (rhs
)) != ARITH_OK
)
10373 if (rc
== ARITH_UNDERFLOW
)
10374 gfc_error ("Arithmetic underflow of bit-wise transferred BOZ at %L"
10375 ". This check can be disabled with the option "
10376 "%<-fno-range-check%>", &rhs
->where
);
10377 else if (rc
== ARITH_OVERFLOW
)
10378 gfc_error ("Arithmetic overflow of bit-wise transferred BOZ at %L"
10379 ". This check can be disabled with the option "
10380 "%<-fno-range-check%>", &rhs
->where
);
10381 else if (rc
== ARITH_NAN
)
10382 gfc_error ("Arithmetic NaN of bit-wise transferred BOZ at %L"
10383 ". This check can be disabled with the option "
10384 "%<-fno-range-check%>", &rhs
->where
);
10389 if (lhs
->ts
.type
== BT_CHARACTER
10390 && warn_character_truncation
)
10392 HOST_WIDE_INT llen
= 0, rlen
= 0;
10393 if (lhs
->ts
.u
.cl
!= NULL
10394 && lhs
->ts
.u
.cl
->length
!= NULL
10395 && lhs
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
)
10396 llen
= gfc_mpz_get_hwi (lhs
->ts
.u
.cl
->length
->value
.integer
);
10398 if (rhs
->expr_type
== EXPR_CONSTANT
)
10399 rlen
= rhs
->value
.character
.length
;
10401 else if (rhs
->ts
.u
.cl
!= NULL
10402 && rhs
->ts
.u
.cl
->length
!= NULL
10403 && rhs
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
)
10404 rlen
= gfc_mpz_get_hwi (rhs
->ts
.u
.cl
->length
->value
.integer
);
10406 if (rlen
&& llen
&& rlen
> llen
)
10407 gfc_warning_now (OPT_Wcharacter_truncation
,
10408 "CHARACTER expression will be truncated "
10409 "in assignment (%ld/%ld) at %L",
10410 (long) llen
, (long) rlen
, &code
->loc
);
10413 /* Ensure that a vector index expression for the lvalue is evaluated
10414 to a temporary if the lvalue symbol is referenced in it. */
10417 for (ref
= lhs
->ref
; ref
; ref
= ref
->next
)
10418 if (ref
->type
== REF_ARRAY
)
10420 for (n
= 0; n
< ref
->u
.ar
.dimen
; n
++)
10421 if (ref
->u
.ar
.dimen_type
[n
] == DIMEN_VECTOR
10422 && gfc_find_sym_in_expr (lhs
->symtree
->n
.sym
,
10423 ref
->u
.ar
.start
[n
]))
10425 = gfc_get_parentheses (ref
->u
.ar
.start
[n
]);
10429 if (gfc_pure (NULL
))
10431 if (lhs
->ts
.type
== BT_DERIVED
10432 && lhs
->expr_type
== EXPR_VARIABLE
10433 && lhs
->ts
.u
.derived
->attr
.pointer_comp
10434 && rhs
->expr_type
== EXPR_VARIABLE
10435 && (gfc_impure_variable (rhs
->symtree
->n
.sym
)
10436 || gfc_is_coindexed (rhs
)))
10438 /* F2008, C1283. */
10439 if (gfc_is_coindexed (rhs
))
10440 gfc_error ("Coindexed expression at %L is assigned to "
10441 "a derived type variable with a POINTER "
10442 "component in a PURE procedure",
10445 gfc_error ("The impure variable at %L is assigned to "
10446 "a derived type variable with a POINTER "
10447 "component in a PURE procedure (12.6)",
10452 /* Fortran 2008, C1283. */
10453 if (gfc_is_coindexed (lhs
))
10455 gfc_error ("Assignment to coindexed variable at %L in a PURE "
10456 "procedure", &rhs
->where
);
10461 if (gfc_implicit_pure (NULL
))
10463 if (lhs
->expr_type
== EXPR_VARIABLE
10464 && lhs
->symtree
->n
.sym
!= gfc_current_ns
->proc_name
10465 && lhs
->symtree
->n
.sym
->ns
!= gfc_current_ns
)
10466 gfc_unset_implicit_pure (NULL
);
10468 if (lhs
->ts
.type
== BT_DERIVED
10469 && lhs
->expr_type
== EXPR_VARIABLE
10470 && lhs
->ts
.u
.derived
->attr
.pointer_comp
10471 && rhs
->expr_type
== EXPR_VARIABLE
10472 && (gfc_impure_variable (rhs
->symtree
->n
.sym
)
10473 || gfc_is_coindexed (rhs
)))
10474 gfc_unset_implicit_pure (NULL
);
10476 /* Fortran 2008, C1283. */
10477 if (gfc_is_coindexed (lhs
))
10478 gfc_unset_implicit_pure (NULL
);
10481 /* F2008, 7.2.1.2. */
10482 attr
= gfc_expr_attr (lhs
);
10483 if (lhs
->ts
.type
== BT_CLASS
&& attr
.allocatable
)
10485 if (attr
.codimension
)
10487 gfc_error ("Assignment to polymorphic coarray at %L is not "
10488 "permitted", &lhs
->where
);
10491 if (!gfc_notify_std (GFC_STD_F2008
, "Assignment to an allocatable "
10492 "polymorphic variable at %L", &lhs
->where
))
10494 if (!flag_realloc_lhs
)
10496 gfc_error ("Assignment to an allocatable polymorphic variable at %L "
10497 "requires %<-frealloc-lhs%>", &lhs
->where
);
10501 else if (lhs
->ts
.type
== BT_CLASS
)
10503 gfc_error ("Nonallocatable variable must not be polymorphic in intrinsic "
10504 "assignment at %L - check that there is a matching specific "
10505 "subroutine for '=' operator", &lhs
->where
);
10509 bool lhs_coindexed
= gfc_is_coindexed (lhs
);
10511 /* F2008, Section 7.2.1.2. */
10512 if (lhs_coindexed
&& gfc_has_ultimate_allocatable (lhs
))
10514 gfc_error ("Coindexed variable must not have an allocatable ultimate "
10515 "component in assignment at %L", &lhs
->where
);
10519 /* Assign the 'data' of a class object to a derived type. */
10520 if (lhs
->ts
.type
== BT_DERIVED
10521 && rhs
->ts
.type
== BT_CLASS
10522 && rhs
->expr_type
!= EXPR_ARRAY
)
10523 gfc_add_data_component (rhs
);
10525 /* Make sure there is a vtable and, in particular, a _copy for the
10527 if (UNLIMITED_POLY (lhs
) && lhs
->rank
&& rhs
->ts
.type
!= BT_CLASS
)
10528 gfc_find_vtab (&rhs
->ts
);
10530 bool caf_convert_to_send
= flag_coarray
== GFC_FCOARRAY_LIB
10532 || (code
->expr2
->expr_type
== EXPR_FUNCTION
10533 && code
->expr2
->value
.function
.isym
10534 && code
->expr2
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
10535 && (code
->expr1
->rank
== 0 || code
->expr2
->rank
!= 0)
10536 && !gfc_expr_attr (rhs
).allocatable
10537 && !gfc_has_vector_subscript (rhs
)));
10539 gfc_check_assign (lhs
, rhs
, 1, !caf_convert_to_send
);
10541 /* Insert a GFC_ISYM_CAF_SEND intrinsic, when the LHS is a coindexed variable.
10542 Additionally, insert this code when the RHS is a CAF as we then use the
10543 GFC_ISYM_CAF_SEND intrinsic just to avoid a temporary; but do not do so if
10544 the LHS is (re)allocatable or has a vector subscript. If the LHS is a
10545 noncoindexed array and the RHS is a coindexed scalar, use the normal code
10547 if (caf_convert_to_send
)
10549 if (code
->expr2
->expr_type
== EXPR_FUNCTION
10550 && code
->expr2
->value
.function
.isym
10551 && code
->expr2
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
)
10552 remove_caf_get_intrinsic (code
->expr2
);
10553 code
->op
= EXEC_CALL
;
10554 gfc_get_sym_tree (GFC_PREFIX ("caf_send"), ns
, &code
->symtree
, true);
10555 code
->resolved_sym
= code
->symtree
->n
.sym
;
10556 code
->resolved_sym
->attr
.flavor
= FL_PROCEDURE
;
10557 code
->resolved_sym
->attr
.intrinsic
= 1;
10558 code
->resolved_sym
->attr
.subroutine
= 1;
10559 code
->resolved_isym
= gfc_intrinsic_subroutine_by_id (GFC_ISYM_CAF_SEND
);
10560 gfc_commit_symbol (code
->resolved_sym
);
10561 code
->ext
.actual
= gfc_get_actual_arglist ();
10562 code
->ext
.actual
->expr
= lhs
;
10563 code
->ext
.actual
->next
= gfc_get_actual_arglist ();
10564 code
->ext
.actual
->next
->expr
= rhs
;
10565 code
->expr1
= NULL
;
10566 code
->expr2
= NULL
;
10573 /* Add a component reference onto an expression. */
10576 add_comp_ref (gfc_expr
*e
, gfc_component
*c
)
10581 ref
= &((*ref
)->next
);
10582 *ref
= gfc_get_ref ();
10583 (*ref
)->type
= REF_COMPONENT
;
10584 (*ref
)->u
.c
.sym
= e
->ts
.u
.derived
;
10585 (*ref
)->u
.c
.component
= c
;
10588 /* Add a full array ref, as necessary. */
10591 gfc_add_full_array_ref (e
, c
->as
);
10592 e
->rank
= c
->as
->rank
;
10597 /* Build an assignment. Keep the argument 'op' for future use, so that
10598 pointer assignments can be made. */
10601 build_assignment (gfc_exec_op op
, gfc_expr
*expr1
, gfc_expr
*expr2
,
10602 gfc_component
*comp1
, gfc_component
*comp2
, locus loc
)
10604 gfc_code
*this_code
;
10606 this_code
= gfc_get_code (op
);
10607 this_code
->next
= NULL
;
10608 this_code
->expr1
= gfc_copy_expr (expr1
);
10609 this_code
->expr2
= gfc_copy_expr (expr2
);
10610 this_code
->loc
= loc
;
10611 if (comp1
&& comp2
)
10613 add_comp_ref (this_code
->expr1
, comp1
);
10614 add_comp_ref (this_code
->expr2
, comp2
);
10621 /* Makes a temporary variable expression based on the characteristics of
10622 a given variable expression. */
10625 get_temp_from_expr (gfc_expr
*e
, gfc_namespace
*ns
)
10627 static int serial
= 0;
10628 char name
[GFC_MAX_SYMBOL_LEN
];
10630 gfc_array_spec
*as
;
10631 gfc_array_ref
*aref
;
10634 sprintf (name
, GFC_PREFIX("DA%d"), serial
++);
10635 gfc_get_sym_tree (name
, ns
, &tmp
, false);
10636 gfc_add_type (tmp
->n
.sym
, &e
->ts
, NULL
);
10638 if (e
->expr_type
== EXPR_CONSTANT
&& e
->ts
.type
== BT_CHARACTER
)
10639 tmp
->n
.sym
->ts
.u
.cl
->length
= gfc_get_int_expr (gfc_charlen_int_kind
,
10641 e
->value
.character
.length
);
10647 /* Obtain the arrayspec for the temporary. */
10648 if (e
->rank
&& e
->expr_type
!= EXPR_ARRAY
10649 && e
->expr_type
!= EXPR_FUNCTION
10650 && e
->expr_type
!= EXPR_OP
)
10652 aref
= gfc_find_array_ref (e
);
10653 if (e
->expr_type
== EXPR_VARIABLE
10654 && e
->symtree
->n
.sym
->as
== aref
->as
)
10658 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
10659 if (ref
->type
== REF_COMPONENT
10660 && ref
->u
.c
.component
->as
== aref
->as
)
10668 /* Add the attributes and the arrayspec to the temporary. */
10669 tmp
->n
.sym
->attr
= gfc_expr_attr (e
);
10670 tmp
->n
.sym
->attr
.function
= 0;
10671 tmp
->n
.sym
->attr
.result
= 0;
10672 tmp
->n
.sym
->attr
.flavor
= FL_VARIABLE
;
10673 tmp
->n
.sym
->attr
.dummy
= 0;
10674 tmp
->n
.sym
->attr
.intent
= INTENT_UNKNOWN
;
10678 tmp
->n
.sym
->as
= gfc_copy_array_spec (as
);
10681 if (as
->type
== AS_DEFERRED
)
10682 tmp
->n
.sym
->attr
.allocatable
= 1;
10684 else if (e
->rank
&& (e
->expr_type
== EXPR_ARRAY
10685 || e
->expr_type
== EXPR_FUNCTION
10686 || e
->expr_type
== EXPR_OP
))
10688 tmp
->n
.sym
->as
= gfc_get_array_spec ();
10689 tmp
->n
.sym
->as
->type
= AS_DEFERRED
;
10690 tmp
->n
.sym
->as
->rank
= e
->rank
;
10691 tmp
->n
.sym
->attr
.allocatable
= 1;
10692 tmp
->n
.sym
->attr
.dimension
= 1;
10695 tmp
->n
.sym
->attr
.dimension
= 0;
10697 gfc_set_sym_referenced (tmp
->n
.sym
);
10698 gfc_commit_symbol (tmp
->n
.sym
);
10699 e
= gfc_lval_expr_from_sym (tmp
->n
.sym
);
10701 /* Should the lhs be a section, use its array ref for the
10702 temporary expression. */
10703 if (aref
&& aref
->type
!= AR_FULL
)
10705 gfc_free_ref_list (e
->ref
);
10706 e
->ref
= gfc_copy_ref (ref
);
10712 /* Add one line of code to the code chain, making sure that 'head' and
10713 'tail' are appropriately updated. */
10716 add_code_to_chain (gfc_code
**this_code
, gfc_code
**head
, gfc_code
**tail
)
10718 gcc_assert (this_code
);
10720 *head
= *tail
= *this_code
;
10722 *tail
= gfc_append_code (*tail
, *this_code
);
10727 /* Counts the potential number of part array references that would
10728 result from resolution of typebound defined assignments. */
10731 nonscalar_typebound_assign (gfc_symbol
*derived
, int depth
)
10734 int c_depth
= 0, t_depth
;
10736 for (c
= derived
->components
; c
; c
= c
->next
)
10738 if ((!gfc_bt_struct (c
->ts
.type
)
10740 || c
->attr
.allocatable
10741 || c
->attr
.proc_pointer_comp
10742 || c
->attr
.class_pointer
10743 || c
->attr
.proc_pointer
)
10744 && !c
->attr
.defined_assign_comp
)
10747 if (c
->as
&& c_depth
== 0)
10750 if (c
->ts
.u
.derived
->attr
.defined_assign_comp
)
10751 t_depth
= nonscalar_typebound_assign (c
->ts
.u
.derived
,
10756 c_depth
= t_depth
> c_depth
? t_depth
: c_depth
;
10758 return depth
+ c_depth
;
10762 /* Implement 7.2.1.3 of the F08 standard:
10763 "An intrinsic assignment where the variable is of derived type is
10764 performed as if each component of the variable were assigned from the
10765 corresponding component of expr using pointer assignment (7.2.2) for
10766 each pointer component, defined assignment for each nonpointer
10767 nonallocatable component of a type that has a type-bound defined
10768 assignment consistent with the component, intrinsic assignment for
10769 each other nonpointer nonallocatable component, ..."
10771 The pointer assignments are taken care of by the intrinsic
10772 assignment of the structure itself. This function recursively adds
10773 defined assignments where required. The recursion is accomplished
10774 by calling gfc_resolve_code.
10776 When the lhs in a defined assignment has intent INOUT, we need a
10777 temporary for the lhs. In pseudo-code:
10779 ! Only call function lhs once.
10780 if (lhs is not a constant or an variable)
10783 ! Do the intrinsic assignment
10785 ! Now do the defined assignments
10786 do over components with typebound defined assignment [%cmp]
10787 #if one component's assignment procedure is INOUT
10789 #if expr2 non-variable
10795 t1%cmp {defined=} expr2%cmp
10801 expr1%cmp {defined=} expr2%cmp
10805 /* The temporary assignments have to be put on top of the additional
10806 code to avoid the result being changed by the intrinsic assignment.
10808 static int component_assignment_level
= 0;
10809 static gfc_code
*tmp_head
= NULL
, *tmp_tail
= NULL
;
10812 generate_component_assignments (gfc_code
**code
, gfc_namespace
*ns
)
10814 gfc_component
*comp1
, *comp2
;
10815 gfc_code
*this_code
= NULL
, *head
= NULL
, *tail
= NULL
;
10817 int error_count
, depth
;
10819 gfc_get_errors (NULL
, &error_count
);
10821 /* Filter out continuing processing after an error. */
10823 || (*code
)->expr1
->ts
.type
!= BT_DERIVED
10824 || (*code
)->expr2
->ts
.type
!= BT_DERIVED
)
10827 /* TODO: Handle more than one part array reference in assignments. */
10828 depth
= nonscalar_typebound_assign ((*code
)->expr1
->ts
.u
.derived
,
10829 (*code
)->expr1
->rank
? 1 : 0);
10832 gfc_warning (0, "TODO: type-bound defined assignment(s) at %L not "
10833 "done because multiple part array references would "
10834 "occur in intermediate expressions.", &(*code
)->loc
);
10838 component_assignment_level
++;
10840 /* Create a temporary so that functions get called only once. */
10841 if ((*code
)->expr2
->expr_type
!= EXPR_VARIABLE
10842 && (*code
)->expr2
->expr_type
!= EXPR_CONSTANT
)
10844 gfc_expr
*tmp_expr
;
10846 /* Assign the rhs to the temporary. */
10847 tmp_expr
= get_temp_from_expr ((*code
)->expr1
, ns
);
10848 this_code
= build_assignment (EXEC_ASSIGN
,
10849 tmp_expr
, (*code
)->expr2
,
10850 NULL
, NULL
, (*code
)->loc
);
10851 /* Add the code and substitute the rhs expression. */
10852 add_code_to_chain (&this_code
, &tmp_head
, &tmp_tail
);
10853 gfc_free_expr ((*code
)->expr2
);
10854 (*code
)->expr2
= tmp_expr
;
10857 /* Do the intrinsic assignment. This is not needed if the lhs is one
10858 of the temporaries generated here, since the intrinsic assignment
10859 to the final result already does this. */
10860 if ((*code
)->expr1
->symtree
->n
.sym
->name
[2] != '@')
10862 this_code
= build_assignment (EXEC_ASSIGN
,
10863 (*code
)->expr1
, (*code
)->expr2
,
10864 NULL
, NULL
, (*code
)->loc
);
10865 add_code_to_chain (&this_code
, &head
, &tail
);
10868 comp1
= (*code
)->expr1
->ts
.u
.derived
->components
;
10869 comp2
= (*code
)->expr2
->ts
.u
.derived
->components
;
10872 for (; comp1
; comp1
= comp1
->next
, comp2
= comp2
->next
)
10874 bool inout
= false;
10876 /* The intrinsic assignment does the right thing for pointers
10877 of all kinds and allocatable components. */
10878 if (!gfc_bt_struct (comp1
->ts
.type
)
10879 || comp1
->attr
.pointer
10880 || comp1
->attr
.allocatable
10881 || comp1
->attr
.proc_pointer_comp
10882 || comp1
->attr
.class_pointer
10883 || comp1
->attr
.proc_pointer
)
10886 /* Make an assigment for this component. */
10887 this_code
= build_assignment (EXEC_ASSIGN
,
10888 (*code
)->expr1
, (*code
)->expr2
,
10889 comp1
, comp2
, (*code
)->loc
);
10891 /* Convert the assignment if there is a defined assignment for
10892 this type. Otherwise, using the call from gfc_resolve_code,
10893 recurse into its components. */
10894 gfc_resolve_code (this_code
, ns
);
10896 if (this_code
->op
== EXEC_ASSIGN_CALL
)
10898 gfc_formal_arglist
*dummy_args
;
10900 /* Check that there is a typebound defined assignment. If not,
10901 then this must be a module defined assignment. We cannot
10902 use the defined_assign_comp attribute here because it must
10903 be this derived type that has the defined assignment and not
10905 if (!(comp1
->ts
.u
.derived
->f2k_derived
10906 && comp1
->ts
.u
.derived
->f2k_derived
10907 ->tb_op
[INTRINSIC_ASSIGN
]))
10909 gfc_free_statements (this_code
);
10914 /* If the first argument of the subroutine has intent INOUT
10915 a temporary must be generated and used instead. */
10916 rsym
= this_code
->resolved_sym
;
10917 dummy_args
= gfc_sym_get_dummy_args (rsym
);
10919 && dummy_args
->sym
->attr
.intent
== INTENT_INOUT
)
10921 gfc_code
*temp_code
;
10924 /* Build the temporary required for the assignment and put
10925 it at the head of the generated code. */
10928 t1
= get_temp_from_expr ((*code
)->expr1
, ns
);
10929 temp_code
= build_assignment (EXEC_ASSIGN
,
10930 t1
, (*code
)->expr1
,
10931 NULL
, NULL
, (*code
)->loc
);
10933 /* For allocatable LHS, check whether it is allocated. Note
10934 that allocatable components with defined assignment are
10935 not yet support. See PR 57696. */
10936 if ((*code
)->expr1
->symtree
->n
.sym
->attr
.allocatable
)
10940 gfc_lval_expr_from_sym ((*code
)->expr1
->symtree
->n
.sym
);
10941 block
= gfc_get_code (EXEC_IF
);
10942 block
->block
= gfc_get_code (EXEC_IF
);
10943 block
->block
->expr1
10944 = gfc_build_intrinsic_call (ns
,
10945 GFC_ISYM_ALLOCATED
, "allocated",
10946 (*code
)->loc
, 1, e
);
10947 block
->block
->next
= temp_code
;
10950 add_code_to_chain (&temp_code
, &tmp_head
, &tmp_tail
);
10953 /* Replace the first actual arg with the component of the
10955 gfc_free_expr (this_code
->ext
.actual
->expr
);
10956 this_code
->ext
.actual
->expr
= gfc_copy_expr (t1
);
10957 add_comp_ref (this_code
->ext
.actual
->expr
, comp1
);
10959 /* If the LHS variable is allocatable and wasn't allocated and
10960 the temporary is allocatable, pointer assign the address of
10961 the freshly allocated LHS to the temporary. */
10962 if ((*code
)->expr1
->symtree
->n
.sym
->attr
.allocatable
10963 && gfc_expr_attr ((*code
)->expr1
).allocatable
)
10968 cond
= gfc_get_expr ();
10969 cond
->ts
.type
= BT_LOGICAL
;
10970 cond
->ts
.kind
= gfc_default_logical_kind
;
10971 cond
->expr_type
= EXPR_OP
;
10972 cond
->where
= (*code
)->loc
;
10973 cond
->value
.op
.op
= INTRINSIC_NOT
;
10974 cond
->value
.op
.op1
= gfc_build_intrinsic_call (ns
,
10975 GFC_ISYM_ALLOCATED
, "allocated",
10976 (*code
)->loc
, 1, gfc_copy_expr (t1
));
10977 block
= gfc_get_code (EXEC_IF
);
10978 block
->block
= gfc_get_code (EXEC_IF
);
10979 block
->block
->expr1
= cond
;
10980 block
->block
->next
= build_assignment (EXEC_POINTER_ASSIGN
,
10981 t1
, (*code
)->expr1
,
10982 NULL
, NULL
, (*code
)->loc
);
10983 add_code_to_chain (&block
, &head
, &tail
);
10987 else if (this_code
->op
== EXEC_ASSIGN
&& !this_code
->next
)
10989 /* Don't add intrinsic assignments since they are already
10990 effected by the intrinsic assignment of the structure. */
10991 gfc_free_statements (this_code
);
10996 add_code_to_chain (&this_code
, &head
, &tail
);
11000 /* Transfer the value to the final result. */
11001 this_code
= build_assignment (EXEC_ASSIGN
,
11002 (*code
)->expr1
, t1
,
11003 comp1
, comp2
, (*code
)->loc
);
11004 add_code_to_chain (&this_code
, &head
, &tail
);
11008 /* Put the temporary assignments at the top of the generated code. */
11009 if (tmp_head
&& component_assignment_level
== 1)
11011 gfc_append_code (tmp_head
, head
);
11013 tmp_head
= tmp_tail
= NULL
;
11016 // If we did a pointer assignment - thus, we need to ensure that the LHS is
11017 // not accidentally deallocated. Hence, nullify t1.
11018 if (t1
&& (*code
)->expr1
->symtree
->n
.sym
->attr
.allocatable
11019 && gfc_expr_attr ((*code
)->expr1
).allocatable
)
11025 e
= gfc_lval_expr_from_sym ((*code
)->expr1
->symtree
->n
.sym
);
11026 cond
= gfc_build_intrinsic_call (ns
, GFC_ISYM_ASSOCIATED
, "associated",
11027 (*code
)->loc
, 2, gfc_copy_expr (t1
), e
);
11028 block
= gfc_get_code (EXEC_IF
);
11029 block
->block
= gfc_get_code (EXEC_IF
);
11030 block
->block
->expr1
= cond
;
11031 block
->block
->next
= build_assignment (EXEC_POINTER_ASSIGN
,
11032 t1
, gfc_get_null_expr (&(*code
)->loc
),
11033 NULL
, NULL
, (*code
)->loc
);
11034 gfc_append_code (tail
, block
);
11038 /* Now attach the remaining code chain to the input code. Step on
11039 to the end of the new code since resolution is complete. */
11040 gcc_assert ((*code
)->op
== EXEC_ASSIGN
);
11041 tail
->next
= (*code
)->next
;
11042 /* Overwrite 'code' because this would place the intrinsic assignment
11043 before the temporary for the lhs is created. */
11044 gfc_free_expr ((*code
)->expr1
);
11045 gfc_free_expr ((*code
)->expr2
);
11051 component_assignment_level
--;
11055 /* F2008: Pointer function assignments are of the form:
11056 ptr_fcn (args) = expr
11057 This function breaks these assignments into two statements:
11058 temporary_pointer => ptr_fcn(args)
11059 temporary_pointer = expr */
11062 resolve_ptr_fcn_assign (gfc_code
**code
, gfc_namespace
*ns
)
11064 gfc_expr
*tmp_ptr_expr
;
11065 gfc_code
*this_code
;
11066 gfc_component
*comp
;
11069 if ((*code
)->expr1
->expr_type
!= EXPR_FUNCTION
)
11072 /* Even if standard does not support this feature, continue to build
11073 the two statements to avoid upsetting frontend_passes.c. */
11074 gfc_notify_std (GFC_STD_F2008
, "Pointer procedure assignment at "
11075 "%L", &(*code
)->loc
);
11077 comp
= gfc_get_proc_ptr_comp ((*code
)->expr1
);
11080 s
= comp
->ts
.interface
;
11082 s
= (*code
)->expr1
->symtree
->n
.sym
;
11084 if (s
== NULL
|| !s
->result
->attr
.pointer
)
11086 gfc_error ("The function result on the lhs of the assignment at "
11087 "%L must have the pointer attribute.",
11088 &(*code
)->expr1
->where
);
11089 (*code
)->op
= EXEC_NOP
;
11093 tmp_ptr_expr
= get_temp_from_expr ((*code
)->expr2
, ns
);
11095 /* get_temp_from_expression is set up for ordinary assignments. To that
11096 end, where array bounds are not known, arrays are made allocatable.
11097 Change the temporary to a pointer here. */
11098 tmp_ptr_expr
->symtree
->n
.sym
->attr
.pointer
= 1;
11099 tmp_ptr_expr
->symtree
->n
.sym
->attr
.allocatable
= 0;
11100 tmp_ptr_expr
->where
= (*code
)->loc
;
11102 this_code
= build_assignment (EXEC_ASSIGN
,
11103 tmp_ptr_expr
, (*code
)->expr2
,
11104 NULL
, NULL
, (*code
)->loc
);
11105 this_code
->next
= (*code
)->next
;
11106 (*code
)->next
= this_code
;
11107 (*code
)->op
= EXEC_POINTER_ASSIGN
;
11108 (*code
)->expr2
= (*code
)->expr1
;
11109 (*code
)->expr1
= tmp_ptr_expr
;
11115 /* Deferred character length assignments from an operator expression
11116 require a temporary because the character length of the lhs can
11117 change in the course of the assignment. */
11120 deferred_op_assign (gfc_code
**code
, gfc_namespace
*ns
)
11122 gfc_expr
*tmp_expr
;
11123 gfc_code
*this_code
;
11125 if (!((*code
)->expr1
->ts
.type
== BT_CHARACTER
11126 && (*code
)->expr1
->ts
.deferred
&& (*code
)->expr1
->rank
11127 && (*code
)->expr2
->expr_type
== EXPR_OP
))
11130 if (!gfc_check_dependency ((*code
)->expr1
, (*code
)->expr2
, 1))
11133 tmp_expr
= get_temp_from_expr ((*code
)->expr1
, ns
);
11134 tmp_expr
->where
= (*code
)->loc
;
11136 /* A new charlen is required to ensure that the variable string
11137 length is different to that of the original lhs. */
11138 tmp_expr
->ts
.u
.cl
= gfc_get_charlen();
11139 tmp_expr
->symtree
->n
.sym
->ts
.u
.cl
= tmp_expr
->ts
.u
.cl
;
11140 tmp_expr
->ts
.u
.cl
->next
= (*code
)->expr2
->ts
.u
.cl
->next
;
11141 (*code
)->expr2
->ts
.u
.cl
->next
= tmp_expr
->ts
.u
.cl
;
11143 tmp_expr
->symtree
->n
.sym
->ts
.deferred
= 1;
11145 this_code
= build_assignment (EXEC_ASSIGN
,
11147 gfc_copy_expr (tmp_expr
),
11148 NULL
, NULL
, (*code
)->loc
);
11150 (*code
)->expr1
= tmp_expr
;
11152 this_code
->next
= (*code
)->next
;
11153 (*code
)->next
= this_code
;
11159 /* Given a block of code, recursively resolve everything pointed to by this
11163 gfc_resolve_code (gfc_code
*code
, gfc_namespace
*ns
)
11165 int omp_workshare_save
;
11166 int forall_save
, do_concurrent_save
;
11170 frame
.prev
= cs_base
;
11174 find_reachable_labels (code
);
11176 for (; code
; code
= code
->next
)
11178 frame
.current
= code
;
11179 forall_save
= forall_flag
;
11180 do_concurrent_save
= gfc_do_concurrent_flag
;
11182 if (code
->op
== EXEC_FORALL
)
11185 gfc_resolve_forall (code
, ns
, forall_save
);
11188 else if (code
->block
)
11190 omp_workshare_save
= -1;
11193 case EXEC_OACC_PARALLEL_LOOP
:
11194 case EXEC_OACC_PARALLEL
:
11195 case EXEC_OACC_KERNELS_LOOP
:
11196 case EXEC_OACC_KERNELS
:
11197 case EXEC_OACC_DATA
:
11198 case EXEC_OACC_HOST_DATA
:
11199 case EXEC_OACC_LOOP
:
11200 gfc_resolve_oacc_blocks (code
, ns
);
11202 case EXEC_OMP_PARALLEL_WORKSHARE
:
11203 omp_workshare_save
= omp_workshare_flag
;
11204 omp_workshare_flag
= 1;
11205 gfc_resolve_omp_parallel_blocks (code
, ns
);
11207 case EXEC_OMP_PARALLEL
:
11208 case EXEC_OMP_PARALLEL_DO
:
11209 case EXEC_OMP_PARALLEL_DO_SIMD
:
11210 case EXEC_OMP_PARALLEL_SECTIONS
:
11211 case EXEC_OMP_TARGET_PARALLEL
:
11212 case EXEC_OMP_TARGET_PARALLEL_DO
:
11213 case EXEC_OMP_TARGET_PARALLEL_DO_SIMD
:
11214 case EXEC_OMP_TARGET_TEAMS
:
11215 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE
:
11216 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO
:
11217 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
11218 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_SIMD
:
11219 case EXEC_OMP_TASK
:
11220 case EXEC_OMP_TASKLOOP
:
11221 case EXEC_OMP_TASKLOOP_SIMD
:
11222 case EXEC_OMP_TEAMS
:
11223 case EXEC_OMP_TEAMS_DISTRIBUTE
:
11224 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO
:
11225 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
11226 case EXEC_OMP_TEAMS_DISTRIBUTE_SIMD
:
11227 omp_workshare_save
= omp_workshare_flag
;
11228 omp_workshare_flag
= 0;
11229 gfc_resolve_omp_parallel_blocks (code
, ns
);
11231 case EXEC_OMP_DISTRIBUTE
:
11232 case EXEC_OMP_DISTRIBUTE_SIMD
:
11234 case EXEC_OMP_DO_SIMD
:
11235 case EXEC_OMP_SIMD
:
11236 case EXEC_OMP_TARGET_SIMD
:
11237 gfc_resolve_omp_do_blocks (code
, ns
);
11239 case EXEC_SELECT_TYPE
:
11240 /* Blocks are handled in resolve_select_type because we have
11241 to transform the SELECT TYPE into ASSOCIATE first. */
11243 case EXEC_DO_CONCURRENT
:
11244 gfc_do_concurrent_flag
= 1;
11245 gfc_resolve_blocks (code
->block
, ns
);
11246 gfc_do_concurrent_flag
= 2;
11248 case EXEC_OMP_WORKSHARE
:
11249 omp_workshare_save
= omp_workshare_flag
;
11250 omp_workshare_flag
= 1;
11253 gfc_resolve_blocks (code
->block
, ns
);
11257 if (omp_workshare_save
!= -1)
11258 omp_workshare_flag
= omp_workshare_save
;
11262 if (code
->op
!= EXEC_COMPCALL
&& code
->op
!= EXEC_CALL_PPC
)
11263 t
= gfc_resolve_expr (code
->expr1
);
11264 forall_flag
= forall_save
;
11265 gfc_do_concurrent_flag
= do_concurrent_save
;
11267 if (!gfc_resolve_expr (code
->expr2
))
11270 if (code
->op
== EXEC_ALLOCATE
11271 && !gfc_resolve_expr (code
->expr3
))
11277 case EXEC_END_BLOCK
:
11278 case EXEC_END_NESTED_BLOCK
:
11282 case EXEC_ERROR_STOP
:
11284 case EXEC_CONTINUE
:
11286 case EXEC_ASSIGN_CALL
:
11289 case EXEC_CRITICAL
:
11290 resolve_critical (code
);
11293 case EXEC_SYNC_ALL
:
11294 case EXEC_SYNC_IMAGES
:
11295 case EXEC_SYNC_MEMORY
:
11296 resolve_sync (code
);
11301 case EXEC_EVENT_POST
:
11302 case EXEC_EVENT_WAIT
:
11303 resolve_lock_unlock_event (code
);
11306 case EXEC_FAIL_IMAGE
:
11307 case EXEC_FORM_TEAM
:
11308 case EXEC_CHANGE_TEAM
:
11309 case EXEC_END_TEAM
:
11310 case EXEC_SYNC_TEAM
:
11314 /* Keep track of which entry we are up to. */
11315 current_entry_id
= code
->ext
.entry
->id
;
11319 resolve_where (code
, NULL
);
11323 if (code
->expr1
!= NULL
)
11325 if (code
->expr1
->ts
.type
!= BT_INTEGER
)
11326 gfc_error ("ASSIGNED GOTO statement at %L requires an "
11327 "INTEGER variable", &code
->expr1
->where
);
11328 else if (code
->expr1
->symtree
->n
.sym
->attr
.assign
!= 1)
11329 gfc_error ("Variable %qs has not been assigned a target "
11330 "label at %L", code
->expr1
->symtree
->n
.sym
->name
,
11331 &code
->expr1
->where
);
11334 resolve_branch (code
->label1
, code
);
11338 if (code
->expr1
!= NULL
11339 && (code
->expr1
->ts
.type
!= BT_INTEGER
|| code
->expr1
->rank
))
11340 gfc_error ("Alternate RETURN statement at %L requires a SCALAR-"
11341 "INTEGER return specifier", &code
->expr1
->where
);
11344 case EXEC_INIT_ASSIGN
:
11345 case EXEC_END_PROCEDURE
:
11352 /* Remove a GFC_ISYM_CAF_GET inserted for a coindexed variable on
11354 if (code
->expr1
->expr_type
== EXPR_FUNCTION
11355 && code
->expr1
->value
.function
.isym
11356 && code
->expr1
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
)
11357 remove_caf_get_intrinsic (code
->expr1
);
11359 /* If this is a pointer function in an lvalue variable context,
11360 the new code will have to be resolved afresh. This is also the
11361 case with an error, where the code is transformed into NOP to
11362 prevent ICEs downstream. */
11363 if (resolve_ptr_fcn_assign (&code
, ns
)
11364 || code
->op
== EXEC_NOP
)
11367 if (!gfc_check_vardef_context (code
->expr1
, false, false, false,
11371 if (resolve_ordinary_assign (code
, ns
))
11373 if (code
->op
== EXEC_COMPCALL
)
11379 /* Check for dependencies in deferred character length array
11380 assignments and generate a temporary, if necessary. */
11381 if (code
->op
== EXEC_ASSIGN
&& deferred_op_assign (&code
, ns
))
11384 /* F03 7.4.1.3 for non-allocatable, non-pointer components. */
11385 if (code
->op
!= EXEC_CALL
&& code
->expr1
->ts
.type
== BT_DERIVED
11386 && code
->expr1
->ts
.u
.derived
11387 && code
->expr1
->ts
.u
.derived
->attr
.defined_assign_comp
)
11388 generate_component_assignments (&code
, ns
);
11392 case EXEC_LABEL_ASSIGN
:
11393 if (code
->label1
->defined
== ST_LABEL_UNKNOWN
)
11394 gfc_error ("Label %d referenced at %L is never defined",
11395 code
->label1
->value
, &code
->label1
->where
);
11397 && (code
->expr1
->expr_type
!= EXPR_VARIABLE
11398 || code
->expr1
->symtree
->n
.sym
->ts
.type
!= BT_INTEGER
11399 || code
->expr1
->symtree
->n
.sym
->ts
.kind
11400 != gfc_default_integer_kind
11401 || code
->expr1
->symtree
->n
.sym
->as
!= NULL
))
11402 gfc_error ("ASSIGN statement at %L requires a scalar "
11403 "default INTEGER variable", &code
->expr1
->where
);
11406 case EXEC_POINTER_ASSIGN
:
11413 /* This is both a variable definition and pointer assignment
11414 context, so check both of them. For rank remapping, a final
11415 array ref may be present on the LHS and fool gfc_expr_attr
11416 used in gfc_check_vardef_context. Remove it. */
11417 e
= remove_last_array_ref (code
->expr1
);
11418 t
= gfc_check_vardef_context (e
, true, false, false,
11419 _("pointer assignment"));
11421 t
= gfc_check_vardef_context (e
, false, false, false,
11422 _("pointer assignment"));
11425 t
= gfc_check_pointer_assign (code
->expr1
, code
->expr2
, !t
) && t
;
11430 /* Assigning a class object always is a regular assign. */
11431 if (code
->expr2
->ts
.type
== BT_CLASS
11432 && code
->expr1
->ts
.type
== BT_CLASS
11433 && !CLASS_DATA (code
->expr2
)->attr
.dimension
11434 && !(gfc_expr_attr (code
->expr1
).proc_pointer
11435 && code
->expr2
->expr_type
== EXPR_VARIABLE
11436 && code
->expr2
->symtree
->n
.sym
->attr
.flavor
11438 code
->op
= EXEC_ASSIGN
;
11442 case EXEC_ARITHMETIC_IF
:
11444 gfc_expr
*e
= code
->expr1
;
11446 gfc_resolve_expr (e
);
11447 if (e
->expr_type
== EXPR_NULL
)
11448 gfc_error ("Invalid NULL at %L", &e
->where
);
11450 if (t
&& (e
->rank
> 0
11451 || !(e
->ts
.type
== BT_REAL
|| e
->ts
.type
== BT_INTEGER
)))
11452 gfc_error ("Arithmetic IF statement at %L requires a scalar "
11453 "REAL or INTEGER expression", &e
->where
);
11455 resolve_branch (code
->label1
, code
);
11456 resolve_branch (code
->label2
, code
);
11457 resolve_branch (code
->label3
, code
);
11462 if (t
&& code
->expr1
!= NULL
11463 && (code
->expr1
->ts
.type
!= BT_LOGICAL
11464 || code
->expr1
->rank
!= 0))
11465 gfc_error ("IF clause at %L requires a scalar LOGICAL expression",
11466 &code
->expr1
->where
);
11471 resolve_call (code
);
11474 case EXEC_COMPCALL
:
11476 resolve_typebound_subroutine (code
);
11479 case EXEC_CALL_PPC
:
11480 resolve_ppc_call (code
);
11484 /* Select is complicated. Also, a SELECT construct could be
11485 a transformed computed GOTO. */
11486 resolve_select (code
, false);
11489 case EXEC_SELECT_TYPE
:
11490 resolve_select_type (code
, ns
);
11494 resolve_block_construct (code
);
11498 if (code
->ext
.iterator
!= NULL
)
11500 gfc_iterator
*iter
= code
->ext
.iterator
;
11501 if (gfc_resolve_iterator (iter
, true, false))
11502 gfc_resolve_do_iterator (code
, iter
->var
->symtree
->n
.sym
,
11507 case EXEC_DO_WHILE
:
11508 if (code
->expr1
== NULL
)
11509 gfc_internal_error ("gfc_resolve_code(): No expression on "
11512 && (code
->expr1
->rank
!= 0
11513 || code
->expr1
->ts
.type
!= BT_LOGICAL
))
11514 gfc_error ("Exit condition of DO WHILE loop at %L must be "
11515 "a scalar LOGICAL expression", &code
->expr1
->where
);
11518 case EXEC_ALLOCATE
:
11520 resolve_allocate_deallocate (code
, "ALLOCATE");
11524 case EXEC_DEALLOCATE
:
11526 resolve_allocate_deallocate (code
, "DEALLOCATE");
11531 if (!gfc_resolve_open (code
->ext
.open
))
11534 resolve_branch (code
->ext
.open
->err
, code
);
11538 if (!gfc_resolve_close (code
->ext
.close
))
11541 resolve_branch (code
->ext
.close
->err
, code
);
11544 case EXEC_BACKSPACE
:
11548 if (!gfc_resolve_filepos (code
->ext
.filepos
, &code
->loc
))
11551 resolve_branch (code
->ext
.filepos
->err
, code
);
11555 if (!gfc_resolve_inquire (code
->ext
.inquire
))
11558 resolve_branch (code
->ext
.inquire
->err
, code
);
11561 case EXEC_IOLENGTH
:
11562 gcc_assert (code
->ext
.inquire
!= NULL
);
11563 if (!gfc_resolve_inquire (code
->ext
.inquire
))
11566 resolve_branch (code
->ext
.inquire
->err
, code
);
11570 if (!gfc_resolve_wait (code
->ext
.wait
))
11573 resolve_branch (code
->ext
.wait
->err
, code
);
11574 resolve_branch (code
->ext
.wait
->end
, code
);
11575 resolve_branch (code
->ext
.wait
->eor
, code
);
11580 if (!gfc_resolve_dt (code
->ext
.dt
, &code
->loc
))
11583 resolve_branch (code
->ext
.dt
->err
, code
);
11584 resolve_branch (code
->ext
.dt
->end
, code
);
11585 resolve_branch (code
->ext
.dt
->eor
, code
);
11588 case EXEC_TRANSFER
:
11589 resolve_transfer (code
);
11592 case EXEC_DO_CONCURRENT
:
11594 resolve_forall_iterators (code
->ext
.forall_iterator
);
11596 if (code
->expr1
!= NULL
11597 && (code
->expr1
->ts
.type
!= BT_LOGICAL
|| code
->expr1
->rank
))
11598 gfc_error ("FORALL mask clause at %L requires a scalar LOGICAL "
11599 "expression", &code
->expr1
->where
);
11602 case EXEC_OACC_PARALLEL_LOOP
:
11603 case EXEC_OACC_PARALLEL
:
11604 case EXEC_OACC_KERNELS_LOOP
:
11605 case EXEC_OACC_KERNELS
:
11606 case EXEC_OACC_DATA
:
11607 case EXEC_OACC_HOST_DATA
:
11608 case EXEC_OACC_LOOP
:
11609 case EXEC_OACC_UPDATE
:
11610 case EXEC_OACC_WAIT
:
11611 case EXEC_OACC_CACHE
:
11612 case EXEC_OACC_ENTER_DATA
:
11613 case EXEC_OACC_EXIT_DATA
:
11614 case EXEC_OACC_ATOMIC
:
11615 case EXEC_OACC_DECLARE
:
11616 gfc_resolve_oacc_directive (code
, ns
);
11619 case EXEC_OMP_ATOMIC
:
11620 case EXEC_OMP_BARRIER
:
11621 case EXEC_OMP_CANCEL
:
11622 case EXEC_OMP_CANCELLATION_POINT
:
11623 case EXEC_OMP_CRITICAL
:
11624 case EXEC_OMP_FLUSH
:
11625 case EXEC_OMP_DISTRIBUTE
:
11626 case EXEC_OMP_DISTRIBUTE_PARALLEL_DO
:
11627 case EXEC_OMP_DISTRIBUTE_PARALLEL_DO_SIMD
:
11628 case EXEC_OMP_DISTRIBUTE_SIMD
:
11630 case EXEC_OMP_DO_SIMD
:
11631 case EXEC_OMP_MASTER
:
11632 case EXEC_OMP_ORDERED
:
11633 case EXEC_OMP_SECTIONS
:
11634 case EXEC_OMP_SIMD
:
11635 case EXEC_OMP_SINGLE
:
11636 case EXEC_OMP_TARGET
:
11637 case EXEC_OMP_TARGET_DATA
:
11638 case EXEC_OMP_TARGET_ENTER_DATA
:
11639 case EXEC_OMP_TARGET_EXIT_DATA
:
11640 case EXEC_OMP_TARGET_PARALLEL
:
11641 case EXEC_OMP_TARGET_PARALLEL_DO
:
11642 case EXEC_OMP_TARGET_PARALLEL_DO_SIMD
:
11643 case EXEC_OMP_TARGET_SIMD
:
11644 case EXEC_OMP_TARGET_TEAMS
:
11645 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE
:
11646 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO
:
11647 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
11648 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_SIMD
:
11649 case EXEC_OMP_TARGET_UPDATE
:
11650 case EXEC_OMP_TASK
:
11651 case EXEC_OMP_TASKGROUP
:
11652 case EXEC_OMP_TASKLOOP
:
11653 case EXEC_OMP_TASKLOOP_SIMD
:
11654 case EXEC_OMP_TASKWAIT
:
11655 case EXEC_OMP_TASKYIELD
:
11656 case EXEC_OMP_TEAMS
:
11657 case EXEC_OMP_TEAMS_DISTRIBUTE
:
11658 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO
:
11659 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
11660 case EXEC_OMP_TEAMS_DISTRIBUTE_SIMD
:
11661 case EXEC_OMP_WORKSHARE
:
11662 gfc_resolve_omp_directive (code
, ns
);
11665 case EXEC_OMP_PARALLEL
:
11666 case EXEC_OMP_PARALLEL_DO
:
11667 case EXEC_OMP_PARALLEL_DO_SIMD
:
11668 case EXEC_OMP_PARALLEL_SECTIONS
:
11669 case EXEC_OMP_PARALLEL_WORKSHARE
:
11670 omp_workshare_save
= omp_workshare_flag
;
11671 omp_workshare_flag
= 0;
11672 gfc_resolve_omp_directive (code
, ns
);
11673 omp_workshare_flag
= omp_workshare_save
;
11677 gfc_internal_error ("gfc_resolve_code(): Bad statement code");
11681 cs_base
= frame
.prev
;
11685 /* Resolve initial values and make sure they are compatible with
11689 resolve_values (gfc_symbol
*sym
)
11693 if (sym
->value
== NULL
)
11696 if (sym
->value
->expr_type
== EXPR_STRUCTURE
)
11697 t
= resolve_structure_cons (sym
->value
, 1);
11699 t
= gfc_resolve_expr (sym
->value
);
11704 gfc_check_assign_symbol (sym
, NULL
, sym
->value
);
11708 /* Verify any BIND(C) derived types in the namespace so we can report errors
11709 for them once, rather than for each variable declared of that type. */
11712 resolve_bind_c_derived_types (gfc_symbol
*derived_sym
)
11714 if (derived_sym
!= NULL
&& derived_sym
->attr
.flavor
== FL_DERIVED
11715 && derived_sym
->attr
.is_bind_c
== 1)
11716 verify_bind_c_derived_type (derived_sym
);
11722 /* Check the interfaces of DTIO procedures associated with derived
11723 type 'sym'. These procedures can either have typebound bindings or
11724 can appear in DTIO generic interfaces. */
11727 gfc_verify_DTIO_procedures (gfc_symbol
*sym
)
11729 if (!sym
|| sym
->attr
.flavor
!= FL_DERIVED
)
11732 gfc_check_dtio_interfaces (sym
);
11737 /* Verify that any binding labels used in a given namespace do not collide
11738 with the names or binding labels of any global symbols. Multiple INTERFACE
11739 for the same procedure are permitted. */
11742 gfc_verify_binding_labels (gfc_symbol
*sym
)
11745 const char *module
;
11747 if (!sym
|| !sym
->attr
.is_bind_c
|| sym
->attr
.is_iso_c
11748 || sym
->attr
.flavor
== FL_DERIVED
|| !sym
->binding_label
)
11751 gsym
= gfc_find_case_gsymbol (gfc_gsym_root
, sym
->binding_label
);
11754 module
= sym
->module
;
11755 else if (sym
->ns
&& sym
->ns
->proc_name
11756 && sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
)
11757 module
= sym
->ns
->proc_name
->name
;
11758 else if (sym
->ns
&& sym
->ns
->parent
11759 && sym
->ns
&& sym
->ns
->parent
->proc_name
11760 && sym
->ns
->parent
->proc_name
->attr
.flavor
== FL_MODULE
)
11761 module
= sym
->ns
->parent
->proc_name
->name
;
11767 && (gsym
->type
== GSYM_FUNCTION
|| gsym
->type
== GSYM_SUBROUTINE
)))
11770 gsym
= gfc_get_gsymbol (sym
->binding_label
);
11771 gsym
->where
= sym
->declared_at
;
11772 gsym
->sym_name
= sym
->name
;
11773 gsym
->binding_label
= sym
->binding_label
;
11774 gsym
->ns
= sym
->ns
;
11775 gsym
->mod_name
= module
;
11776 if (sym
->attr
.function
)
11777 gsym
->type
= GSYM_FUNCTION
;
11778 else if (sym
->attr
.subroutine
)
11779 gsym
->type
= GSYM_SUBROUTINE
;
11780 /* Mark as variable/procedure as defined, unless its an INTERFACE. */
11781 gsym
->defined
= sym
->attr
.if_source
!= IFSRC_IFBODY
;
11785 if (sym
->attr
.flavor
== FL_VARIABLE
&& gsym
->type
!= GSYM_UNKNOWN
)
11787 gfc_error ("Variable %qs with binding label %qs at %L uses the same global "
11788 "identifier as entity at %L", sym
->name
,
11789 sym
->binding_label
, &sym
->declared_at
, &gsym
->where
);
11790 /* Clear the binding label to prevent checking multiple times. */
11791 sym
->binding_label
= NULL
;
11794 else if (sym
->attr
.flavor
== FL_VARIABLE
&& module
11795 && (strcmp (module
, gsym
->mod_name
) != 0
11796 || strcmp (sym
->name
, gsym
->sym_name
) != 0))
11798 /* This can only happen if the variable is defined in a module - if it
11799 isn't the same module, reject it. */
11800 gfc_error ("Variable %qs from module %qs with binding label %qs at %L "
11801 "uses the same global identifier as entity at %L from module %qs",
11802 sym
->name
, module
, sym
->binding_label
,
11803 &sym
->declared_at
, &gsym
->where
, gsym
->mod_name
);
11804 sym
->binding_label
= NULL
;
11806 else if ((sym
->attr
.function
|| sym
->attr
.subroutine
)
11807 && ((gsym
->type
!= GSYM_SUBROUTINE
&& gsym
->type
!= GSYM_FUNCTION
)
11808 || (gsym
->defined
&& sym
->attr
.if_source
!= IFSRC_IFBODY
))
11809 && sym
!= gsym
->ns
->proc_name
11810 && (module
!= gsym
->mod_name
11811 || strcmp (gsym
->sym_name
, sym
->name
) != 0
11812 || (module
&& strcmp (module
, gsym
->mod_name
) != 0)))
11814 /* Print an error if the procedure is defined multiple times; we have to
11815 exclude references to the same procedure via module association or
11816 multiple checks for the same procedure. */
11817 gfc_error ("Procedure %qs with binding label %qs at %L uses the same "
11818 "global identifier as entity at %L", sym
->name
,
11819 sym
->binding_label
, &sym
->declared_at
, &gsym
->where
);
11820 sym
->binding_label
= NULL
;
11825 /* Resolve an index expression. */
11828 resolve_index_expr (gfc_expr
*e
)
11830 if (!gfc_resolve_expr (e
))
11833 if (!gfc_simplify_expr (e
, 0))
11836 if (!gfc_specification_expr (e
))
11843 /* Resolve a charlen structure. */
11846 resolve_charlen (gfc_charlen
*cl
)
11849 bool saved_specification_expr
;
11855 saved_specification_expr
= specification_expr
;
11856 specification_expr
= true;
11858 if (cl
->length_from_typespec
)
11860 if (!gfc_resolve_expr (cl
->length
))
11862 specification_expr
= saved_specification_expr
;
11866 if (!gfc_simplify_expr (cl
->length
, 0))
11868 specification_expr
= saved_specification_expr
;
11872 /* cl->length has been resolved. It should have an integer type. */
11873 if (cl
->length
->ts
.type
!= BT_INTEGER
)
11875 gfc_error ("Scalar INTEGER expression expected at %L",
11876 &cl
->length
->where
);
11882 if (!resolve_index_expr (cl
->length
))
11884 specification_expr
= saved_specification_expr
;
11889 /* F2008, 4.4.3.2: If the character length parameter value evaluates to
11890 a negative value, the length of character entities declared is zero. */
11891 if (cl
->length
&& cl
->length
->expr_type
== EXPR_CONSTANT
11892 && mpz_sgn (cl
->length
->value
.integer
) < 0)
11893 gfc_replace_expr (cl
->length
,
11894 gfc_get_int_expr (gfc_charlen_int_kind
, NULL
, 0));
11896 /* Check that the character length is not too large. */
11897 k
= gfc_validate_kind (BT_INTEGER
, gfc_charlen_int_kind
, false);
11898 if (cl
->length
&& cl
->length
->expr_type
== EXPR_CONSTANT
11899 && cl
->length
->ts
.type
== BT_INTEGER
11900 && mpz_cmp (cl
->length
->value
.integer
, gfc_integer_kinds
[k
].huge
) > 0)
11902 gfc_error ("String length at %L is too large", &cl
->length
->where
);
11903 specification_expr
= saved_specification_expr
;
11907 specification_expr
= saved_specification_expr
;
11912 /* Test for non-constant shape arrays. */
11915 is_non_constant_shape_array (gfc_symbol
*sym
)
11921 not_constant
= false;
11922 if (sym
->as
!= NULL
)
11924 /* Unfortunately, !gfc_is_compile_time_shape hits a legal case that
11925 has not been simplified; parameter array references. Do the
11926 simplification now. */
11927 for (i
= 0; i
< sym
->as
->rank
+ sym
->as
->corank
; i
++)
11929 e
= sym
->as
->lower
[i
];
11930 if (e
&& (!resolve_index_expr(e
)
11931 || !gfc_is_constant_expr (e
)))
11932 not_constant
= true;
11933 e
= sym
->as
->upper
[i
];
11934 if (e
&& (!resolve_index_expr(e
)
11935 || !gfc_is_constant_expr (e
)))
11936 not_constant
= true;
11939 return not_constant
;
11942 /* Given a symbol and an initialization expression, add code to initialize
11943 the symbol to the function entry. */
11945 build_init_assign (gfc_symbol
*sym
, gfc_expr
*init
)
11949 gfc_namespace
*ns
= sym
->ns
;
11951 /* Search for the function namespace if this is a contained
11952 function without an explicit result. */
11953 if (sym
->attr
.function
&& sym
== sym
->result
11954 && sym
->name
!= sym
->ns
->proc_name
->name
)
11956 ns
= ns
->contained
;
11957 for (;ns
; ns
= ns
->sibling
)
11958 if (strcmp (ns
->proc_name
->name
, sym
->name
) == 0)
11964 gfc_free_expr (init
);
11968 /* Build an l-value expression for the result. */
11969 lval
= gfc_lval_expr_from_sym (sym
);
11971 /* Add the code at scope entry. */
11972 init_st
= gfc_get_code (EXEC_INIT_ASSIGN
);
11973 init_st
->next
= ns
->code
;
11974 ns
->code
= init_st
;
11976 /* Assign the default initializer to the l-value. */
11977 init_st
->loc
= sym
->declared_at
;
11978 init_st
->expr1
= lval
;
11979 init_st
->expr2
= init
;
11983 /* Whether or not we can generate a default initializer for a symbol. */
11986 can_generate_init (gfc_symbol
*sym
)
11988 symbol_attribute
*a
;
11993 /* These symbols should never have a default initialization. */
11998 || (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
)
11999 && (CLASS_DATA (sym
)->attr
.class_pointer
12000 || CLASS_DATA (sym
)->attr
.proc_pointer
))
12001 || a
->in_equivalence
12008 || (!a
->referenced
&& !a
->result
)
12009 || (a
->dummy
&& a
->intent
!= INTENT_OUT
)
12010 || (a
->function
&& sym
!= sym
->result
)
12015 /* Assign the default initializer to a derived type variable or result. */
12018 apply_default_init (gfc_symbol
*sym
)
12020 gfc_expr
*init
= NULL
;
12022 if (sym
->attr
.flavor
!= FL_VARIABLE
&& !sym
->attr
.function
)
12025 if (sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
)
12026 init
= gfc_generate_initializer (&sym
->ts
, can_generate_init (sym
));
12028 if (init
== NULL
&& sym
->ts
.type
!= BT_CLASS
)
12031 build_init_assign (sym
, init
);
12032 sym
->attr
.referenced
= 1;
12036 /* Build an initializer for a local. Returns null if the symbol should not have
12037 a default initialization. */
12040 build_default_init_expr (gfc_symbol
*sym
)
12042 /* These symbols should never have a default initialization. */
12043 if (sym
->attr
.allocatable
12044 || sym
->attr
.external
12046 || sym
->attr
.pointer
12047 || sym
->attr
.in_equivalence
12048 || sym
->attr
.in_common
12051 || sym
->attr
.cray_pointee
12052 || sym
->attr
.cray_pointer
12056 /* Get the appropriate init expression. */
12057 return gfc_build_default_init_expr (&sym
->ts
, &sym
->declared_at
);
12060 /* Add an initialization expression to a local variable. */
12062 apply_default_init_local (gfc_symbol
*sym
)
12064 gfc_expr
*init
= NULL
;
12066 /* The symbol should be a variable or a function return value. */
12067 if ((sym
->attr
.flavor
!= FL_VARIABLE
&& !sym
->attr
.function
)
12068 || (sym
->attr
.function
&& sym
->result
!= sym
))
12071 /* Try to build the initializer expression. If we can't initialize
12072 this symbol, then init will be NULL. */
12073 init
= build_default_init_expr (sym
);
12077 /* For saved variables, we don't want to add an initializer at function
12078 entry, so we just add a static initializer. Note that automatic variables
12079 are stack allocated even with -fno-automatic; we have also to exclude
12080 result variable, which are also nonstatic. */
12081 if (!sym
->attr
.automatic
12082 && (sym
->attr
.save
|| sym
->ns
->save_all
12083 || (flag_max_stack_var_size
== 0 && !sym
->attr
.result
12084 && (sym
->ns
->proc_name
&& !sym
->ns
->proc_name
->attr
.recursive
)
12085 && (!sym
->attr
.dimension
|| !is_non_constant_shape_array (sym
)))))
12087 /* Don't clobber an existing initializer! */
12088 gcc_assert (sym
->value
== NULL
);
12093 build_init_assign (sym
, init
);
12097 /* Resolution of common features of flavors variable and procedure. */
12100 resolve_fl_var_and_proc (gfc_symbol
*sym
, int mp_flag
)
12102 gfc_array_spec
*as
;
12104 if (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
)
12105 as
= CLASS_DATA (sym
)->as
;
12109 /* Constraints on deferred shape variable. */
12110 if (as
== NULL
|| as
->type
!= AS_DEFERRED
)
12112 bool pointer
, allocatable
, dimension
;
12114 if (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
)
12116 pointer
= CLASS_DATA (sym
)->attr
.class_pointer
;
12117 allocatable
= CLASS_DATA (sym
)->attr
.allocatable
;
12118 dimension
= CLASS_DATA (sym
)->attr
.dimension
;
12122 pointer
= sym
->attr
.pointer
&& !sym
->attr
.select_type_temporary
;
12123 allocatable
= sym
->attr
.allocatable
;
12124 dimension
= sym
->attr
.dimension
;
12129 if (dimension
&& as
->type
!= AS_ASSUMED_RANK
)
12131 gfc_error ("Allocatable array %qs at %L must have a deferred "
12132 "shape or assumed rank", sym
->name
, &sym
->declared_at
);
12135 else if (!gfc_notify_std (GFC_STD_F2003
, "Scalar object "
12136 "%qs at %L may not be ALLOCATABLE",
12137 sym
->name
, &sym
->declared_at
))
12141 if (pointer
&& dimension
&& as
->type
!= AS_ASSUMED_RANK
)
12143 gfc_error ("Array pointer %qs at %L must have a deferred shape or "
12144 "assumed rank", sym
->name
, &sym
->declared_at
);
12150 if (!mp_flag
&& !sym
->attr
.allocatable
&& !sym
->attr
.pointer
12151 && sym
->ts
.type
!= BT_CLASS
&& !sym
->assoc
)
12153 gfc_error ("Array %qs at %L cannot have a deferred shape",
12154 sym
->name
, &sym
->declared_at
);
12159 /* Constraints on polymorphic variables. */
12160 if (sym
->ts
.type
== BT_CLASS
&& !(sym
->result
&& sym
->result
!= sym
))
12163 if (sym
->attr
.class_ok
12164 && !sym
->attr
.select_type_temporary
12165 && !UNLIMITED_POLY (sym
)
12166 && !gfc_type_is_extensible (CLASS_DATA (sym
)->ts
.u
.derived
))
12168 gfc_error ("Type %qs of CLASS variable %qs at %L is not extensible",
12169 CLASS_DATA (sym
)->ts
.u
.derived
->name
, sym
->name
,
12170 &sym
->declared_at
);
12175 /* Assume that use associated symbols were checked in the module ns.
12176 Class-variables that are associate-names are also something special
12177 and excepted from the test. */
12178 if (!sym
->attr
.class_ok
&& !sym
->attr
.use_assoc
&& !sym
->assoc
)
12180 gfc_error ("CLASS variable %qs at %L must be dummy, allocatable "
12181 "or pointer", sym
->name
, &sym
->declared_at
);
12190 /* Additional checks for symbols with flavor variable and derived
12191 type. To be called from resolve_fl_variable. */
12194 resolve_fl_variable_derived (gfc_symbol
*sym
, int no_init_flag
)
12196 gcc_assert (sym
->ts
.type
== BT_DERIVED
|| sym
->ts
.type
== BT_CLASS
);
12198 /* Check to see if a derived type is blocked from being host
12199 associated by the presence of another class I symbol in the same
12200 namespace. 14.6.1.3 of the standard and the discussion on
12201 comp.lang.fortran. */
12202 if (sym
->ns
!= sym
->ts
.u
.derived
->ns
12203 && !sym
->ts
.u
.derived
->attr
.use_assoc
12204 && sym
->ns
->proc_name
->attr
.if_source
!= IFSRC_IFBODY
)
12207 gfc_find_symbol (sym
->ts
.u
.derived
->name
, sym
->ns
, 0, &s
);
12208 if (s
&& s
->attr
.generic
)
12209 s
= gfc_find_dt_in_generic (s
);
12210 if (s
&& !gfc_fl_struct (s
->attr
.flavor
))
12212 gfc_error ("The type %qs cannot be host associated at %L "
12213 "because it is blocked by an incompatible object "
12214 "of the same name declared at %L",
12215 sym
->ts
.u
.derived
->name
, &sym
->declared_at
,
12221 /* 4th constraint in section 11.3: "If an object of a type for which
12222 component-initialization is specified (R429) appears in the
12223 specification-part of a module and does not have the ALLOCATABLE
12224 or POINTER attribute, the object shall have the SAVE attribute."
12226 The check for initializers is performed with
12227 gfc_has_default_initializer because gfc_default_initializer generates
12228 a hidden default for allocatable components. */
12229 if (!(sym
->value
|| no_init_flag
) && sym
->ns
->proc_name
12230 && sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
12231 && !(sym
->ns
->save_all
&& !sym
->attr
.automatic
) && !sym
->attr
.save
12232 && !sym
->attr
.pointer
&& !sym
->attr
.allocatable
12233 && gfc_has_default_initializer (sym
->ts
.u
.derived
)
12234 && !gfc_notify_std (GFC_STD_F2008
, "Implied SAVE for module variable "
12235 "%qs at %L, needed due to the default "
12236 "initialization", sym
->name
, &sym
->declared_at
))
12239 /* Assign default initializer. */
12240 if (!(sym
->value
|| sym
->attr
.pointer
|| sym
->attr
.allocatable
)
12241 && (!no_init_flag
|| sym
->attr
.intent
== INTENT_OUT
))
12242 sym
->value
= gfc_generate_initializer (&sym
->ts
, can_generate_init (sym
));
12248 /* F2008, C402 (R401): A colon shall not be used as a type-param-value
12249 except in the declaration of an entity or component that has the POINTER
12250 or ALLOCATABLE attribute. */
12253 deferred_requirements (gfc_symbol
*sym
)
12255 if (sym
->ts
.deferred
12256 && !(sym
->attr
.pointer
12257 || sym
->attr
.allocatable
12258 || sym
->attr
.associate_var
12259 || sym
->attr
.omp_udr_artificial_var
))
12261 gfc_error ("Entity %qs at %L has a deferred type parameter and "
12262 "requires either the POINTER or ALLOCATABLE attribute",
12263 sym
->name
, &sym
->declared_at
);
12270 /* Resolve symbols with flavor variable. */
12273 resolve_fl_variable (gfc_symbol
*sym
, int mp_flag
)
12275 const char *auto_save_msg
= "Automatic object %qs at %L cannot have the "
12278 if (!resolve_fl_var_and_proc (sym
, mp_flag
))
12281 /* Set this flag to check that variables are parameters of all entries.
12282 This check is effected by the call to gfc_resolve_expr through
12283 is_non_constant_shape_array. */
12284 bool saved_specification_expr
= specification_expr
;
12285 specification_expr
= true;
12287 if (sym
->ns
->proc_name
12288 && (sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
12289 || sym
->ns
->proc_name
->attr
.is_main_program
)
12290 && !sym
->attr
.use_assoc
12291 && !sym
->attr
.allocatable
12292 && !sym
->attr
.pointer
12293 && is_non_constant_shape_array (sym
))
12295 /* F08:C541. The shape of an array defined in a main program or module
12296 * needs to be constant. */
12297 gfc_error ("The module or main program array %qs at %L must "
12298 "have constant shape", sym
->name
, &sym
->declared_at
);
12299 specification_expr
= saved_specification_expr
;
12303 /* Constraints on deferred type parameter. */
12304 if (!deferred_requirements (sym
))
12307 if (sym
->ts
.type
== BT_CHARACTER
&& !sym
->attr
.associate_var
)
12309 /* Make sure that character string variables with assumed length are
12310 dummy arguments. */
12311 gfc_expr
*e
= NULL
;
12314 e
= sym
->ts
.u
.cl
->length
;
12318 if (e
== NULL
&& !sym
->attr
.dummy
&& !sym
->attr
.result
12319 && !sym
->ts
.deferred
&& !sym
->attr
.select_type_temporary
12320 && !sym
->attr
.omp_udr_artificial_var
)
12322 gfc_error ("Entity with assumed character length at %L must be a "
12323 "dummy argument or a PARAMETER", &sym
->declared_at
);
12324 specification_expr
= saved_specification_expr
;
12328 if (e
&& sym
->attr
.save
== SAVE_EXPLICIT
&& !gfc_is_constant_expr (e
))
12330 gfc_error (auto_save_msg
, sym
->name
, &sym
->declared_at
);
12331 specification_expr
= saved_specification_expr
;
12335 if (!gfc_is_constant_expr (e
)
12336 && !(e
->expr_type
== EXPR_VARIABLE
12337 && e
->symtree
->n
.sym
->attr
.flavor
== FL_PARAMETER
))
12339 if (!sym
->attr
.use_assoc
&& sym
->ns
->proc_name
12340 && (sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
12341 || sym
->ns
->proc_name
->attr
.is_main_program
))
12343 gfc_error ("%qs at %L must have constant character length "
12344 "in this context", sym
->name
, &sym
->declared_at
);
12345 specification_expr
= saved_specification_expr
;
12348 if (sym
->attr
.in_common
)
12350 gfc_error ("COMMON variable %qs at %L must have constant "
12351 "character length", sym
->name
, &sym
->declared_at
);
12352 specification_expr
= saved_specification_expr
;
12358 if (sym
->value
== NULL
&& sym
->attr
.referenced
)
12359 apply_default_init_local (sym
); /* Try to apply a default initialization. */
12361 /* Determine if the symbol may not have an initializer. */
12362 int no_init_flag
= 0, automatic_flag
= 0;
12363 if (sym
->attr
.allocatable
|| sym
->attr
.external
|| sym
->attr
.dummy
12364 || sym
->attr
.intrinsic
|| sym
->attr
.result
)
12366 else if ((sym
->attr
.dimension
|| sym
->attr
.codimension
) && !sym
->attr
.pointer
12367 && is_non_constant_shape_array (sym
))
12369 no_init_flag
= automatic_flag
= 1;
12371 /* Also, they must not have the SAVE attribute.
12372 SAVE_IMPLICIT is checked below. */
12373 if (sym
->as
&& sym
->attr
.codimension
)
12375 int corank
= sym
->as
->corank
;
12376 sym
->as
->corank
= 0;
12377 no_init_flag
= automatic_flag
= is_non_constant_shape_array (sym
);
12378 sym
->as
->corank
= corank
;
12380 if (automatic_flag
&& sym
->attr
.save
== SAVE_EXPLICIT
)
12382 gfc_error (auto_save_msg
, sym
->name
, &sym
->declared_at
);
12383 specification_expr
= saved_specification_expr
;
12388 /* Ensure that any initializer is simplified. */
12390 gfc_simplify_expr (sym
->value
, 1);
12392 /* Reject illegal initializers. */
12393 if (!sym
->mark
&& sym
->value
)
12395 if (sym
->attr
.allocatable
|| (sym
->ts
.type
== BT_CLASS
12396 && CLASS_DATA (sym
)->attr
.allocatable
))
12397 gfc_error ("Allocatable %qs at %L cannot have an initializer",
12398 sym
->name
, &sym
->declared_at
);
12399 else if (sym
->attr
.external
)
12400 gfc_error ("External %qs at %L cannot have an initializer",
12401 sym
->name
, &sym
->declared_at
);
12402 else if (sym
->attr
.dummy
12403 && !(sym
->ts
.type
== BT_DERIVED
&& sym
->attr
.intent
== INTENT_OUT
))
12404 gfc_error ("Dummy %qs at %L cannot have an initializer",
12405 sym
->name
, &sym
->declared_at
);
12406 else if (sym
->attr
.intrinsic
)
12407 gfc_error ("Intrinsic %qs at %L cannot have an initializer",
12408 sym
->name
, &sym
->declared_at
);
12409 else if (sym
->attr
.result
)
12410 gfc_error ("Function result %qs at %L cannot have an initializer",
12411 sym
->name
, &sym
->declared_at
);
12412 else if (automatic_flag
)
12413 gfc_error ("Automatic array %qs at %L cannot have an initializer",
12414 sym
->name
, &sym
->declared_at
);
12416 goto no_init_error
;
12417 specification_expr
= saved_specification_expr
;
12422 if (sym
->ts
.type
== BT_DERIVED
|| sym
->ts
.type
== BT_CLASS
)
12424 bool res
= resolve_fl_variable_derived (sym
, no_init_flag
);
12425 specification_expr
= saved_specification_expr
;
12429 specification_expr
= saved_specification_expr
;
12434 /* Compare the dummy characteristics of a module procedure interface
12435 declaration with the corresponding declaration in a submodule. */
12436 static gfc_formal_arglist
*new_formal
;
12437 static char errmsg
[200];
12440 compare_fsyms (gfc_symbol
*sym
)
12444 if (sym
== NULL
|| new_formal
== NULL
)
12447 fsym
= new_formal
->sym
;
12452 if (strcmp (sym
->name
, fsym
->name
) == 0)
12454 if (!gfc_check_dummy_characteristics (fsym
, sym
, true, errmsg
, 200))
12455 gfc_error ("%s at %L", errmsg
, &fsym
->declared_at
);
12460 /* Resolve a procedure. */
12463 resolve_fl_procedure (gfc_symbol
*sym
, int mp_flag
)
12465 gfc_formal_arglist
*arg
;
12467 if (sym
->attr
.function
12468 && !resolve_fl_var_and_proc (sym
, mp_flag
))
12471 if (sym
->ts
.type
== BT_CHARACTER
)
12473 gfc_charlen
*cl
= sym
->ts
.u
.cl
;
12475 if (cl
&& cl
->length
&& gfc_is_constant_expr (cl
->length
)
12476 && !resolve_charlen (cl
))
12479 if ((!cl
|| !cl
->length
|| cl
->length
->expr_type
!= EXPR_CONSTANT
)
12480 && sym
->attr
.proc
== PROC_ST_FUNCTION
)
12482 gfc_error ("Character-valued statement function %qs at %L must "
12483 "have constant length", sym
->name
, &sym
->declared_at
);
12488 /* Ensure that derived type for are not of a private type. Internal
12489 module procedures are excluded by 2.2.3.3 - i.e., they are not
12490 externally accessible and can access all the objects accessible in
12492 if (!(sym
->ns
->parent
&& sym
->ns
->parent
->proc_name
12493 && sym
->ns
->parent
->proc_name
->attr
.flavor
== FL_MODULE
)
12494 && gfc_check_symbol_access (sym
))
12496 gfc_interface
*iface
;
12498 for (arg
= gfc_sym_get_dummy_args (sym
); arg
; arg
= arg
->next
)
12501 && arg
->sym
->ts
.type
== BT_DERIVED
12502 && !arg
->sym
->ts
.u
.derived
->attr
.use_assoc
12503 && !gfc_check_symbol_access (arg
->sym
->ts
.u
.derived
)
12504 && !gfc_notify_std (GFC_STD_F2003
, "%qs is of a PRIVATE type "
12505 "and cannot be a dummy argument"
12506 " of %qs, which is PUBLIC at %L",
12507 arg
->sym
->name
, sym
->name
,
12508 &sym
->declared_at
))
12510 /* Stop this message from recurring. */
12511 arg
->sym
->ts
.u
.derived
->attr
.access
= ACCESS_PUBLIC
;
12516 /* PUBLIC interfaces may expose PRIVATE procedures that take types
12517 PRIVATE to the containing module. */
12518 for (iface
= sym
->generic
; iface
; iface
= iface
->next
)
12520 for (arg
= gfc_sym_get_dummy_args (iface
->sym
); arg
; arg
= arg
->next
)
12523 && arg
->sym
->ts
.type
== BT_DERIVED
12524 && !arg
->sym
->ts
.u
.derived
->attr
.use_assoc
12525 && !gfc_check_symbol_access (arg
->sym
->ts
.u
.derived
)
12526 && !gfc_notify_std (GFC_STD_F2003
, "Procedure %qs in "
12527 "PUBLIC interface %qs at %L "
12528 "takes dummy arguments of %qs which "
12529 "is PRIVATE", iface
->sym
->name
,
12530 sym
->name
, &iface
->sym
->declared_at
,
12531 gfc_typename(&arg
->sym
->ts
)))
12533 /* Stop this message from recurring. */
12534 arg
->sym
->ts
.u
.derived
->attr
.access
= ACCESS_PUBLIC
;
12541 if (sym
->attr
.function
&& sym
->value
&& sym
->attr
.proc
!= PROC_ST_FUNCTION
12542 && !sym
->attr
.proc_pointer
)
12544 gfc_error ("Function %qs at %L cannot have an initializer",
12545 sym
->name
, &sym
->declared_at
);
12547 /* Make sure no second error is issued for this. */
12548 sym
->value
->error
= 1;
12552 /* An external symbol may not have an initializer because it is taken to be
12553 a procedure. Exception: Procedure Pointers. */
12554 if (sym
->attr
.external
&& sym
->value
&& !sym
->attr
.proc_pointer
)
12556 gfc_error ("External object %qs at %L may not have an initializer",
12557 sym
->name
, &sym
->declared_at
);
12561 /* An elemental function is required to return a scalar 12.7.1 */
12562 if (sym
->attr
.elemental
&& sym
->attr
.function
12563 && (sym
->as
|| (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
)->as
)))
12565 gfc_error ("ELEMENTAL function %qs at %L must have a scalar "
12566 "result", sym
->name
, &sym
->declared_at
);
12567 /* Reset so that the error only occurs once. */
12568 sym
->attr
.elemental
= 0;
12572 if (sym
->attr
.proc
== PROC_ST_FUNCTION
12573 && (sym
->attr
.allocatable
|| sym
->attr
.pointer
))
12575 gfc_error ("Statement function %qs at %L may not have pointer or "
12576 "allocatable attribute", sym
->name
, &sym
->declared_at
);
12580 /* 5.1.1.5 of the Standard: A function name declared with an asterisk
12581 char-len-param shall not be array-valued, pointer-valued, recursive
12582 or pure. ....snip... A character value of * may only be used in the
12583 following ways: (i) Dummy arg of procedure - dummy associates with
12584 actual length; (ii) To declare a named constant; or (iii) External
12585 function - but length must be declared in calling scoping unit. */
12586 if (sym
->attr
.function
12587 && sym
->ts
.type
== BT_CHARACTER
&& !sym
->ts
.deferred
12588 && sym
->ts
.u
.cl
&& sym
->ts
.u
.cl
->length
== NULL
)
12590 if ((sym
->as
&& sym
->as
->rank
) || (sym
->attr
.pointer
)
12591 || (sym
->attr
.recursive
) || (sym
->attr
.pure
))
12593 if (sym
->as
&& sym
->as
->rank
)
12594 gfc_error ("CHARACTER(*) function %qs at %L cannot be "
12595 "array-valued", sym
->name
, &sym
->declared_at
);
12597 if (sym
->attr
.pointer
)
12598 gfc_error ("CHARACTER(*) function %qs at %L cannot be "
12599 "pointer-valued", sym
->name
, &sym
->declared_at
);
12601 if (sym
->attr
.pure
)
12602 gfc_error ("CHARACTER(*) function %qs at %L cannot be "
12603 "pure", sym
->name
, &sym
->declared_at
);
12605 if (sym
->attr
.recursive
)
12606 gfc_error ("CHARACTER(*) function %qs at %L cannot be "
12607 "recursive", sym
->name
, &sym
->declared_at
);
12612 /* Appendix B.2 of the standard. Contained functions give an
12613 error anyway. Deferred character length is an F2003 feature.
12614 Don't warn on intrinsic conversion functions, which start
12615 with two underscores. */
12616 if (!sym
->attr
.contained
&& !sym
->ts
.deferred
12617 && (sym
->name
[0] != '_' || sym
->name
[1] != '_'))
12618 gfc_notify_std (GFC_STD_F95_OBS
,
12619 "CHARACTER(*) function %qs at %L",
12620 sym
->name
, &sym
->declared_at
);
12623 /* F2008, C1218. */
12624 if (sym
->attr
.elemental
)
12626 if (sym
->attr
.proc_pointer
)
12628 gfc_error ("Procedure pointer %qs at %L shall not be elemental",
12629 sym
->name
, &sym
->declared_at
);
12632 if (sym
->attr
.dummy
)
12634 gfc_error ("Dummy procedure %qs at %L shall not be elemental",
12635 sym
->name
, &sym
->declared_at
);
12640 /* F2018, C15100: "The result of an elemental function shall be scalar,
12641 and shall not have the POINTER or ALLOCATABLE attribute." The scalar
12642 pointer is tested and caught elsewhere. */
12643 if (sym
->attr
.elemental
&& sym
->result
12644 && (sym
->result
->attr
.allocatable
|| sym
->result
->attr
.pointer
))
12646 gfc_error ("Function result variable %qs at %L of elemental "
12647 "function %qs shall not have an ALLOCATABLE or POINTER "
12648 "attribute", sym
->result
->name
,
12649 &sym
->result
->declared_at
, sym
->name
);
12653 if (sym
->attr
.is_bind_c
&& sym
->attr
.is_c_interop
!= 1)
12655 gfc_formal_arglist
*curr_arg
;
12656 int has_non_interop_arg
= 0;
12658 if (!verify_bind_c_sym (sym
, &(sym
->ts
), sym
->attr
.in_common
,
12659 sym
->common_block
))
12661 /* Clear these to prevent looking at them again if there was an
12663 sym
->attr
.is_bind_c
= 0;
12664 sym
->attr
.is_c_interop
= 0;
12665 sym
->ts
.is_c_interop
= 0;
12669 /* So far, no errors have been found. */
12670 sym
->attr
.is_c_interop
= 1;
12671 sym
->ts
.is_c_interop
= 1;
12674 curr_arg
= gfc_sym_get_dummy_args (sym
);
12675 while (curr_arg
!= NULL
)
12677 /* Skip implicitly typed dummy args here. */
12678 if (curr_arg
->sym
&& curr_arg
->sym
->attr
.implicit_type
== 0)
12679 if (!gfc_verify_c_interop_param (curr_arg
->sym
))
12680 /* If something is found to fail, record the fact so we
12681 can mark the symbol for the procedure as not being
12682 BIND(C) to try and prevent multiple errors being
12684 has_non_interop_arg
= 1;
12686 curr_arg
= curr_arg
->next
;
12689 /* See if any of the arguments were not interoperable and if so, clear
12690 the procedure symbol to prevent duplicate error messages. */
12691 if (has_non_interop_arg
!= 0)
12693 sym
->attr
.is_c_interop
= 0;
12694 sym
->ts
.is_c_interop
= 0;
12695 sym
->attr
.is_bind_c
= 0;
12699 if (!sym
->attr
.proc_pointer
)
12701 if (sym
->attr
.save
== SAVE_EXPLICIT
)
12703 gfc_error ("PROCEDURE attribute conflicts with SAVE attribute "
12704 "in %qs at %L", sym
->name
, &sym
->declared_at
);
12707 if (sym
->attr
.intent
)
12709 gfc_error ("PROCEDURE attribute conflicts with INTENT attribute "
12710 "in %qs at %L", sym
->name
, &sym
->declared_at
);
12713 if (sym
->attr
.subroutine
&& sym
->attr
.result
)
12715 gfc_error ("PROCEDURE attribute conflicts with RESULT attribute "
12716 "in %qs at %L", sym
->name
, &sym
->declared_at
);
12719 if (sym
->attr
.external
&& sym
->attr
.function
&& !sym
->attr
.module_procedure
12720 && ((sym
->attr
.if_source
== IFSRC_DECL
&& !sym
->attr
.procedure
)
12721 || sym
->attr
.contained
))
12723 gfc_error ("EXTERNAL attribute conflicts with FUNCTION attribute "
12724 "in %qs at %L", sym
->name
, &sym
->declared_at
);
12727 if (strcmp ("ppr@", sym
->name
) == 0)
12729 gfc_error ("Procedure pointer result %qs at %L "
12730 "is missing the pointer attribute",
12731 sym
->ns
->proc_name
->name
, &sym
->declared_at
);
12736 /* Assume that a procedure whose body is not known has references
12737 to external arrays. */
12738 if (sym
->attr
.if_source
!= IFSRC_DECL
)
12739 sym
->attr
.array_outer_dependency
= 1;
12741 /* Compare the characteristics of a module procedure with the
12742 interface declaration. Ideally this would be done with
12743 gfc_compare_interfaces but, at present, the formal interface
12744 cannot be copied to the ts.interface. */
12745 if (sym
->attr
.module_procedure
12746 && sym
->attr
.if_source
== IFSRC_DECL
)
12749 char name
[2*GFC_MAX_SYMBOL_LEN
+ 1];
12751 char *submodule_name
;
12752 strcpy (name
, sym
->ns
->proc_name
->name
);
12753 module_name
= strtok (name
, ".");
12754 submodule_name
= strtok (NULL
, ".");
12756 iface
= sym
->tlink
;
12759 /* Make sure that the result uses the correct charlen for deferred
12761 if (iface
&& sym
->result
12762 && iface
->ts
.type
== BT_CHARACTER
12763 && iface
->ts
.deferred
)
12764 sym
->result
->ts
.u
.cl
= iface
->ts
.u
.cl
;
12769 /* Check the procedure characteristics. */
12770 if (sym
->attr
.elemental
!= iface
->attr
.elemental
)
12772 gfc_error ("Mismatch in ELEMENTAL attribute between MODULE "
12773 "PROCEDURE at %L and its interface in %s",
12774 &sym
->declared_at
, module_name
);
12778 if (sym
->attr
.pure
!= iface
->attr
.pure
)
12780 gfc_error ("Mismatch in PURE attribute between MODULE "
12781 "PROCEDURE at %L and its interface in %s",
12782 &sym
->declared_at
, module_name
);
12786 if (sym
->attr
.recursive
!= iface
->attr
.recursive
)
12788 gfc_error ("Mismatch in RECURSIVE attribute between MODULE "
12789 "PROCEDURE at %L and its interface in %s",
12790 &sym
->declared_at
, module_name
);
12794 /* Check the result characteristics. */
12795 if (!gfc_check_result_characteristics (sym
, iface
, errmsg
, 200))
12797 gfc_error ("%s between the MODULE PROCEDURE declaration "
12798 "in MODULE %qs and the declaration at %L in "
12800 errmsg
, module_name
, &sym
->declared_at
,
12801 submodule_name
? submodule_name
: module_name
);
12806 /* Check the characteristics of the formal arguments. */
12807 if (sym
->formal
&& sym
->formal_ns
)
12809 for (arg
= sym
->formal
; arg
&& arg
->sym
; arg
= arg
->next
)
12812 gfc_traverse_ns (sym
->formal_ns
, compare_fsyms
);
12820 /* Resolve a list of finalizer procedures. That is, after they have hopefully
12821 been defined and we now know their defined arguments, check that they fulfill
12822 the requirements of the standard for procedures used as finalizers. */
12825 gfc_resolve_finalizers (gfc_symbol
* derived
, bool *finalizable
)
12827 gfc_finalizer
* list
;
12828 gfc_finalizer
** prev_link
; /* For removing wrong entries from the list. */
12829 bool result
= true;
12830 bool seen_scalar
= false;
12833 gfc_symbol
*parent
= gfc_get_derived_super_type (derived
);
12836 gfc_resolve_finalizers (parent
, finalizable
);
12838 /* Ensure that derived-type components have a their finalizers resolved. */
12839 bool has_final
= derived
->f2k_derived
&& derived
->f2k_derived
->finalizers
;
12840 for (c
= derived
->components
; c
; c
= c
->next
)
12841 if (c
->ts
.type
== BT_DERIVED
12842 && !c
->attr
.pointer
&& !c
->attr
.proc_pointer
&& !c
->attr
.allocatable
)
12844 bool has_final2
= false;
12845 if (!gfc_resolve_finalizers (c
->ts
.u
.derived
, &has_final2
))
12846 return false; /* Error. */
12847 has_final
= has_final
|| has_final2
;
12849 /* Return early if not finalizable. */
12853 *finalizable
= false;
12857 /* Walk over the list of finalizer-procedures, check them, and if any one
12858 does not fit in with the standard's definition, print an error and remove
12859 it from the list. */
12860 prev_link
= &derived
->f2k_derived
->finalizers
;
12861 for (list
= derived
->f2k_derived
->finalizers
; list
; list
= *prev_link
)
12863 gfc_formal_arglist
*dummy_args
;
12868 /* Skip this finalizer if we already resolved it. */
12869 if (list
->proc_tree
)
12871 if (list
->proc_tree
->n
.sym
->formal
->sym
->as
== NULL
12872 || list
->proc_tree
->n
.sym
->formal
->sym
->as
->rank
== 0)
12873 seen_scalar
= true;
12874 prev_link
= &(list
->next
);
12878 /* Check this exists and is a SUBROUTINE. */
12879 if (!list
->proc_sym
->attr
.subroutine
)
12881 gfc_error ("FINAL procedure %qs at %L is not a SUBROUTINE",
12882 list
->proc_sym
->name
, &list
->where
);
12886 /* We should have exactly one argument. */
12887 dummy_args
= gfc_sym_get_dummy_args (list
->proc_sym
);
12888 if (!dummy_args
|| dummy_args
->next
)
12890 gfc_error ("FINAL procedure at %L must have exactly one argument",
12894 arg
= dummy_args
->sym
;
12896 /* This argument must be of our type. */
12897 if (arg
->ts
.type
!= BT_DERIVED
|| arg
->ts
.u
.derived
!= derived
)
12899 gfc_error ("Argument of FINAL procedure at %L must be of type %qs",
12900 &arg
->declared_at
, derived
->name
);
12904 /* It must neither be a pointer nor allocatable nor optional. */
12905 if (arg
->attr
.pointer
)
12907 gfc_error ("Argument of FINAL procedure at %L must not be a POINTER",
12908 &arg
->declared_at
);
12911 if (arg
->attr
.allocatable
)
12913 gfc_error ("Argument of FINAL procedure at %L must not be"
12914 " ALLOCATABLE", &arg
->declared_at
);
12917 if (arg
->attr
.optional
)
12919 gfc_error ("Argument of FINAL procedure at %L must not be OPTIONAL",
12920 &arg
->declared_at
);
12924 /* It must not be INTENT(OUT). */
12925 if (arg
->attr
.intent
== INTENT_OUT
)
12927 gfc_error ("Argument of FINAL procedure at %L must not be"
12928 " INTENT(OUT)", &arg
->declared_at
);
12932 /* Warn if the procedure is non-scalar and not assumed shape. */
12933 if (warn_surprising
&& arg
->as
&& arg
->as
->rank
!= 0
12934 && arg
->as
->type
!= AS_ASSUMED_SHAPE
)
12935 gfc_warning (OPT_Wsurprising
,
12936 "Non-scalar FINAL procedure at %L should have assumed"
12937 " shape argument", &arg
->declared_at
);
12939 /* Check that it does not match in kind and rank with a FINAL procedure
12940 defined earlier. To really loop over the *earlier* declarations,
12941 we need to walk the tail of the list as new ones were pushed at the
12943 /* TODO: Handle kind parameters once they are implemented. */
12944 my_rank
= (arg
->as
? arg
->as
->rank
: 0);
12945 for (i
= list
->next
; i
; i
= i
->next
)
12947 gfc_formal_arglist
*dummy_args
;
12949 /* Argument list might be empty; that is an error signalled earlier,
12950 but we nevertheless continued resolving. */
12951 dummy_args
= gfc_sym_get_dummy_args (i
->proc_sym
);
12954 gfc_symbol
* i_arg
= dummy_args
->sym
;
12955 const int i_rank
= (i_arg
->as
? i_arg
->as
->rank
: 0);
12956 if (i_rank
== my_rank
)
12958 gfc_error ("FINAL procedure %qs declared at %L has the same"
12959 " rank (%d) as %qs",
12960 list
->proc_sym
->name
, &list
->where
, my_rank
,
12961 i
->proc_sym
->name
);
12967 /* Is this the/a scalar finalizer procedure? */
12969 seen_scalar
= true;
12971 /* Find the symtree for this procedure. */
12972 gcc_assert (!list
->proc_tree
);
12973 list
->proc_tree
= gfc_find_sym_in_symtree (list
->proc_sym
);
12975 prev_link
= &list
->next
;
12978 /* Remove wrong nodes immediately from the list so we don't risk any
12979 troubles in the future when they might fail later expectations. */
12982 *prev_link
= list
->next
;
12983 gfc_free_finalizer (i
);
12987 if (result
== false)
12990 /* Warn if we haven't seen a scalar finalizer procedure (but we know there
12991 were nodes in the list, must have been for arrays. It is surely a good
12992 idea to have a scalar version there if there's something to finalize. */
12993 if (warn_surprising
&& derived
->f2k_derived
->finalizers
&& !seen_scalar
)
12994 gfc_warning (OPT_Wsurprising
,
12995 "Only array FINAL procedures declared for derived type %qs"
12996 " defined at %L, suggest also scalar one",
12997 derived
->name
, &derived
->declared_at
);
12999 vtab
= gfc_find_derived_vtab (derived
);
13000 c
= vtab
->ts
.u
.derived
->components
->next
->next
->next
->next
->next
;
13001 gfc_set_sym_referenced (c
->initializer
->symtree
->n
.sym
);
13004 *finalizable
= true;
13010 /* Check if two GENERIC targets are ambiguous and emit an error is they are. */
13013 check_generic_tbp_ambiguity (gfc_tbp_generic
* t1
, gfc_tbp_generic
* t2
,
13014 const char* generic_name
, locus where
)
13016 gfc_symbol
*sym1
, *sym2
;
13017 const char *pass1
, *pass2
;
13018 gfc_formal_arglist
*dummy_args
;
13020 gcc_assert (t1
->specific
&& t2
->specific
);
13021 gcc_assert (!t1
->specific
->is_generic
);
13022 gcc_assert (!t2
->specific
->is_generic
);
13023 gcc_assert (t1
->is_operator
== t2
->is_operator
);
13025 sym1
= t1
->specific
->u
.specific
->n
.sym
;
13026 sym2
= t2
->specific
->u
.specific
->n
.sym
;
13031 /* Both must be SUBROUTINEs or both must be FUNCTIONs. */
13032 if (sym1
->attr
.subroutine
!= sym2
->attr
.subroutine
13033 || sym1
->attr
.function
!= sym2
->attr
.function
)
13035 gfc_error ("%qs and %qs can't be mixed FUNCTION/SUBROUTINE for"
13036 " GENERIC %qs at %L",
13037 sym1
->name
, sym2
->name
, generic_name
, &where
);
13041 /* Determine PASS arguments. */
13042 if (t1
->specific
->nopass
)
13044 else if (t1
->specific
->pass_arg
)
13045 pass1
= t1
->specific
->pass_arg
;
13048 dummy_args
= gfc_sym_get_dummy_args (t1
->specific
->u
.specific
->n
.sym
);
13050 pass1
= dummy_args
->sym
->name
;
13054 if (t2
->specific
->nopass
)
13056 else if (t2
->specific
->pass_arg
)
13057 pass2
= t2
->specific
->pass_arg
;
13060 dummy_args
= gfc_sym_get_dummy_args (t2
->specific
->u
.specific
->n
.sym
);
13062 pass2
= dummy_args
->sym
->name
;
13067 /* Compare the interfaces. */
13068 if (gfc_compare_interfaces (sym1
, sym2
, sym2
->name
, !t1
->is_operator
, 0,
13069 NULL
, 0, pass1
, pass2
))
13071 gfc_error ("%qs and %qs for GENERIC %qs at %L are ambiguous",
13072 sym1
->name
, sym2
->name
, generic_name
, &where
);
13080 /* Worker function for resolving a generic procedure binding; this is used to
13081 resolve GENERIC as well as user and intrinsic OPERATOR typebound procedures.
13083 The difference between those cases is finding possible inherited bindings
13084 that are overridden, as one has to look for them in tb_sym_root,
13085 tb_uop_root or tb_op, respectively. Thus the caller must already find
13086 the super-type and set p->overridden correctly. */
13089 resolve_tb_generic_targets (gfc_symbol
* super_type
,
13090 gfc_typebound_proc
* p
, const char* name
)
13092 gfc_tbp_generic
* target
;
13093 gfc_symtree
* first_target
;
13094 gfc_symtree
* inherited
;
13096 gcc_assert (p
&& p
->is_generic
);
13098 /* Try to find the specific bindings for the symtrees in our target-list. */
13099 gcc_assert (p
->u
.generic
);
13100 for (target
= p
->u
.generic
; target
; target
= target
->next
)
13101 if (!target
->specific
)
13103 gfc_typebound_proc
* overridden_tbp
;
13104 gfc_tbp_generic
* g
;
13105 const char* target_name
;
13107 target_name
= target
->specific_st
->name
;
13109 /* Defined for this type directly. */
13110 if (target
->specific_st
->n
.tb
&& !target
->specific_st
->n
.tb
->error
)
13112 target
->specific
= target
->specific_st
->n
.tb
;
13113 goto specific_found
;
13116 /* Look for an inherited specific binding. */
13119 inherited
= gfc_find_typebound_proc (super_type
, NULL
, target_name
,
13124 gcc_assert (inherited
->n
.tb
);
13125 target
->specific
= inherited
->n
.tb
;
13126 goto specific_found
;
13130 gfc_error ("Undefined specific binding %qs as target of GENERIC %qs"
13131 " at %L", target_name
, name
, &p
->where
);
13134 /* Once we've found the specific binding, check it is not ambiguous with
13135 other specifics already found or inherited for the same GENERIC. */
13137 gcc_assert (target
->specific
);
13139 /* This must really be a specific binding! */
13140 if (target
->specific
->is_generic
)
13142 gfc_error ("GENERIC %qs at %L must target a specific binding,"
13143 " %qs is GENERIC, too", name
, &p
->where
, target_name
);
13147 /* Check those already resolved on this type directly. */
13148 for (g
= p
->u
.generic
; g
; g
= g
->next
)
13149 if (g
!= target
&& g
->specific
13150 && !check_generic_tbp_ambiguity (target
, g
, name
, p
->where
))
13153 /* Check for ambiguity with inherited specific targets. */
13154 for (overridden_tbp
= p
->overridden
; overridden_tbp
;
13155 overridden_tbp
= overridden_tbp
->overridden
)
13156 if (overridden_tbp
->is_generic
)
13158 for (g
= overridden_tbp
->u
.generic
; g
; g
= g
->next
)
13160 gcc_assert (g
->specific
);
13161 if (!check_generic_tbp_ambiguity (target
, g
, name
, p
->where
))
13167 /* If we attempt to "overwrite" a specific binding, this is an error. */
13168 if (p
->overridden
&& !p
->overridden
->is_generic
)
13170 gfc_error ("GENERIC %qs at %L can't overwrite specific binding with"
13171 " the same name", name
, &p
->where
);
13175 /* Take the SUBROUTINE/FUNCTION attributes of the first specific target, as
13176 all must have the same attributes here. */
13177 first_target
= p
->u
.generic
->specific
->u
.specific
;
13178 gcc_assert (first_target
);
13179 p
->subroutine
= first_target
->n
.sym
->attr
.subroutine
;
13180 p
->function
= first_target
->n
.sym
->attr
.function
;
13186 /* Resolve a GENERIC procedure binding for a derived type. */
13189 resolve_typebound_generic (gfc_symbol
* derived
, gfc_symtree
* st
)
13191 gfc_symbol
* super_type
;
13193 /* Find the overridden binding if any. */
13194 st
->n
.tb
->overridden
= NULL
;
13195 super_type
= gfc_get_derived_super_type (derived
);
13198 gfc_symtree
* overridden
;
13199 overridden
= gfc_find_typebound_proc (super_type
, NULL
, st
->name
,
13202 if (overridden
&& overridden
->n
.tb
)
13203 st
->n
.tb
->overridden
= overridden
->n
.tb
;
13206 /* Resolve using worker function. */
13207 return resolve_tb_generic_targets (super_type
, st
->n
.tb
, st
->name
);
13211 /* Retrieve the target-procedure of an operator binding and do some checks in
13212 common for intrinsic and user-defined type-bound operators. */
13215 get_checked_tb_operator_target (gfc_tbp_generic
* target
, locus where
)
13217 gfc_symbol
* target_proc
;
13219 gcc_assert (target
->specific
&& !target
->specific
->is_generic
);
13220 target_proc
= target
->specific
->u
.specific
->n
.sym
;
13221 gcc_assert (target_proc
);
13223 /* F08:C468. All operator bindings must have a passed-object dummy argument. */
13224 if (target
->specific
->nopass
)
13226 gfc_error ("Type-bound operator at %L can't be NOPASS", &where
);
13230 return target_proc
;
13234 /* Resolve a type-bound intrinsic operator. */
13237 resolve_typebound_intrinsic_op (gfc_symbol
* derived
, gfc_intrinsic_op op
,
13238 gfc_typebound_proc
* p
)
13240 gfc_symbol
* super_type
;
13241 gfc_tbp_generic
* target
;
13243 /* If there's already an error here, do nothing (but don't fail again). */
13247 /* Operators should always be GENERIC bindings. */
13248 gcc_assert (p
->is_generic
);
13250 /* Look for an overridden binding. */
13251 super_type
= gfc_get_derived_super_type (derived
);
13252 if (super_type
&& super_type
->f2k_derived
)
13253 p
->overridden
= gfc_find_typebound_intrinsic_op (super_type
, NULL
,
13256 p
->overridden
= NULL
;
13258 /* Resolve general GENERIC properties using worker function. */
13259 if (!resolve_tb_generic_targets (super_type
, p
, gfc_op2string(op
)))
13262 /* Check the targets to be procedures of correct interface. */
13263 for (target
= p
->u
.generic
; target
; target
= target
->next
)
13265 gfc_symbol
* target_proc
;
13267 target_proc
= get_checked_tb_operator_target (target
, p
->where
);
13271 if (!gfc_check_operator_interface (target_proc
, op
, p
->where
))
13274 /* Add target to non-typebound operator list. */
13275 if (!target
->specific
->deferred
&& !derived
->attr
.use_assoc
13276 && p
->access
!= ACCESS_PRIVATE
&& derived
->ns
== gfc_current_ns
)
13278 gfc_interface
*head
, *intr
;
13280 /* Preempt 'gfc_check_new_interface' for submodules, where the
13281 mechanism for handling module procedures winds up resolving
13282 operator interfaces twice and would otherwise cause an error. */
13283 for (intr
= derived
->ns
->op
[op
]; intr
; intr
= intr
->next
)
13284 if (intr
->sym
== target_proc
13285 && target_proc
->attr
.used_in_submodule
)
13288 if (!gfc_check_new_interface (derived
->ns
->op
[op
],
13289 target_proc
, p
->where
))
13291 head
= derived
->ns
->op
[op
];
13292 intr
= gfc_get_interface ();
13293 intr
->sym
= target_proc
;
13294 intr
->where
= p
->where
;
13296 derived
->ns
->op
[op
] = intr
;
13308 /* Resolve a type-bound user operator (tree-walker callback). */
13310 static gfc_symbol
* resolve_bindings_derived
;
13311 static bool resolve_bindings_result
;
13313 static bool check_uop_procedure (gfc_symbol
* sym
, locus where
);
13316 resolve_typebound_user_op (gfc_symtree
* stree
)
13318 gfc_symbol
* super_type
;
13319 gfc_tbp_generic
* target
;
13321 gcc_assert (stree
&& stree
->n
.tb
);
13323 if (stree
->n
.tb
->error
)
13326 /* Operators should always be GENERIC bindings. */
13327 gcc_assert (stree
->n
.tb
->is_generic
);
13329 /* Find overridden procedure, if any. */
13330 super_type
= gfc_get_derived_super_type (resolve_bindings_derived
);
13331 if (super_type
&& super_type
->f2k_derived
)
13333 gfc_symtree
* overridden
;
13334 overridden
= gfc_find_typebound_user_op (super_type
, NULL
,
13335 stree
->name
, true, NULL
);
13337 if (overridden
&& overridden
->n
.tb
)
13338 stree
->n
.tb
->overridden
= overridden
->n
.tb
;
13341 stree
->n
.tb
->overridden
= NULL
;
13343 /* Resolve basically using worker function. */
13344 if (!resolve_tb_generic_targets (super_type
, stree
->n
.tb
, stree
->name
))
13347 /* Check the targets to be functions of correct interface. */
13348 for (target
= stree
->n
.tb
->u
.generic
; target
; target
= target
->next
)
13350 gfc_symbol
* target_proc
;
13352 target_proc
= get_checked_tb_operator_target (target
, stree
->n
.tb
->where
);
13356 if (!check_uop_procedure (target_proc
, stree
->n
.tb
->where
))
13363 resolve_bindings_result
= false;
13364 stree
->n
.tb
->error
= 1;
13368 /* Resolve the type-bound procedures for a derived type. */
13371 resolve_typebound_procedure (gfc_symtree
* stree
)
13375 gfc_symbol
* me_arg
;
13376 gfc_symbol
* super_type
;
13377 gfc_component
* comp
;
13379 gcc_assert (stree
);
13381 /* Undefined specific symbol from GENERIC target definition. */
13385 if (stree
->n
.tb
->error
)
13388 /* If this is a GENERIC binding, use that routine. */
13389 if (stree
->n
.tb
->is_generic
)
13391 if (!resolve_typebound_generic (resolve_bindings_derived
, stree
))
13396 /* Get the target-procedure to check it. */
13397 gcc_assert (!stree
->n
.tb
->is_generic
);
13398 gcc_assert (stree
->n
.tb
->u
.specific
);
13399 proc
= stree
->n
.tb
->u
.specific
->n
.sym
;
13400 where
= stree
->n
.tb
->where
;
13402 /* Default access should already be resolved from the parser. */
13403 gcc_assert (stree
->n
.tb
->access
!= ACCESS_UNKNOWN
);
13405 if (stree
->n
.tb
->deferred
)
13407 if (!check_proc_interface (proc
, &where
))
13412 /* Check for F08:C465. */
13413 if ((!proc
->attr
.subroutine
&& !proc
->attr
.function
)
13414 || (proc
->attr
.proc
!= PROC_MODULE
13415 && proc
->attr
.if_source
!= IFSRC_IFBODY
)
13416 || proc
->attr
.abstract
)
13418 gfc_error ("%qs must be a module procedure or an external procedure with"
13419 " an explicit interface at %L", proc
->name
, &where
);
13424 stree
->n
.tb
->subroutine
= proc
->attr
.subroutine
;
13425 stree
->n
.tb
->function
= proc
->attr
.function
;
13427 /* Find the super-type of the current derived type. We could do this once and
13428 store in a global if speed is needed, but as long as not I believe this is
13429 more readable and clearer. */
13430 super_type
= gfc_get_derived_super_type (resolve_bindings_derived
);
13432 /* If PASS, resolve and check arguments if not already resolved / loaded
13433 from a .mod file. */
13434 if (!stree
->n
.tb
->nopass
&& stree
->n
.tb
->pass_arg_num
== 0)
13436 gfc_formal_arglist
*dummy_args
;
13438 dummy_args
= gfc_sym_get_dummy_args (proc
);
13439 if (stree
->n
.tb
->pass_arg
)
13441 gfc_formal_arglist
*i
;
13443 /* If an explicit passing argument name is given, walk the arg-list
13444 and look for it. */
13447 stree
->n
.tb
->pass_arg_num
= 1;
13448 for (i
= dummy_args
; i
; i
= i
->next
)
13450 if (!strcmp (i
->sym
->name
, stree
->n
.tb
->pass_arg
))
13455 ++stree
->n
.tb
->pass_arg_num
;
13460 gfc_error ("Procedure %qs with PASS(%s) at %L has no"
13462 proc
->name
, stree
->n
.tb
->pass_arg
, &where
,
13463 stree
->n
.tb
->pass_arg
);
13469 /* Otherwise, take the first one; there should in fact be at least
13471 stree
->n
.tb
->pass_arg_num
= 1;
13474 gfc_error ("Procedure %qs with PASS at %L must have at"
13475 " least one argument", proc
->name
, &where
);
13478 me_arg
= dummy_args
->sym
;
13481 /* Now check that the argument-type matches and the passed-object
13482 dummy argument is generally fine. */
13484 gcc_assert (me_arg
);
13486 if (me_arg
->ts
.type
!= BT_CLASS
)
13488 gfc_error ("Non-polymorphic passed-object dummy argument of %qs"
13489 " at %L", proc
->name
, &where
);
13493 if (CLASS_DATA (me_arg
)->ts
.u
.derived
13494 != resolve_bindings_derived
)
13496 gfc_error ("Argument %qs of %qs with PASS(%s) at %L must be of"
13497 " the derived-type %qs", me_arg
->name
, proc
->name
,
13498 me_arg
->name
, &where
, resolve_bindings_derived
->name
);
13502 gcc_assert (me_arg
->ts
.type
== BT_CLASS
);
13503 if (CLASS_DATA (me_arg
)->as
&& CLASS_DATA (me_arg
)->as
->rank
!= 0)
13505 gfc_error ("Passed-object dummy argument of %qs at %L must be"
13506 " scalar", proc
->name
, &where
);
13509 if (CLASS_DATA (me_arg
)->attr
.allocatable
)
13511 gfc_error ("Passed-object dummy argument of %qs at %L must not"
13512 " be ALLOCATABLE", proc
->name
, &where
);
13515 if (CLASS_DATA (me_arg
)->attr
.class_pointer
)
13517 gfc_error ("Passed-object dummy argument of %qs at %L must not"
13518 " be POINTER", proc
->name
, &where
);
13523 /* If we are extending some type, check that we don't override a procedure
13524 flagged NON_OVERRIDABLE. */
13525 stree
->n
.tb
->overridden
= NULL
;
13528 gfc_symtree
* overridden
;
13529 overridden
= gfc_find_typebound_proc (super_type
, NULL
,
13530 stree
->name
, true, NULL
);
13534 if (overridden
->n
.tb
)
13535 stree
->n
.tb
->overridden
= overridden
->n
.tb
;
13537 if (!gfc_check_typebound_override (stree
, overridden
))
13542 /* See if there's a name collision with a component directly in this type. */
13543 for (comp
= resolve_bindings_derived
->components
; comp
; comp
= comp
->next
)
13544 if (!strcmp (comp
->name
, stree
->name
))
13546 gfc_error ("Procedure %qs at %L has the same name as a component of"
13548 stree
->name
, &where
, resolve_bindings_derived
->name
);
13552 /* Try to find a name collision with an inherited component. */
13553 if (super_type
&& gfc_find_component (super_type
, stree
->name
, true, true,
13556 gfc_error ("Procedure %qs at %L has the same name as an inherited"
13557 " component of %qs",
13558 stree
->name
, &where
, resolve_bindings_derived
->name
);
13562 stree
->n
.tb
->error
= 0;
13566 resolve_bindings_result
= false;
13567 stree
->n
.tb
->error
= 1;
13572 resolve_typebound_procedures (gfc_symbol
* derived
)
13575 gfc_symbol
* super_type
;
13577 if (!derived
->f2k_derived
|| !derived
->f2k_derived
->tb_sym_root
)
13580 super_type
= gfc_get_derived_super_type (derived
);
13582 resolve_symbol (super_type
);
13584 resolve_bindings_derived
= derived
;
13585 resolve_bindings_result
= true;
13587 if (derived
->f2k_derived
->tb_sym_root
)
13588 gfc_traverse_symtree (derived
->f2k_derived
->tb_sym_root
,
13589 &resolve_typebound_procedure
);
13591 if (derived
->f2k_derived
->tb_uop_root
)
13592 gfc_traverse_symtree (derived
->f2k_derived
->tb_uop_root
,
13593 &resolve_typebound_user_op
);
13595 for (op
= 0; op
!= GFC_INTRINSIC_OPS
; ++op
)
13597 gfc_typebound_proc
* p
= derived
->f2k_derived
->tb_op
[op
];
13598 if (p
&& !resolve_typebound_intrinsic_op (derived
,
13599 (gfc_intrinsic_op
)op
, p
))
13600 resolve_bindings_result
= false;
13603 return resolve_bindings_result
;
13607 /* Add a derived type to the dt_list. The dt_list is used in trans-types.c
13608 to give all identical derived types the same backend_decl. */
13610 add_dt_to_dt_list (gfc_symbol
*derived
)
13612 if (!derived
->dt_next
)
13614 if (gfc_derived_types
)
13616 derived
->dt_next
= gfc_derived_types
->dt_next
;
13617 gfc_derived_types
->dt_next
= derived
;
13621 derived
->dt_next
= derived
;
13623 gfc_derived_types
= derived
;
13628 /* Ensure that a derived-type is really not abstract, meaning that every
13629 inherited DEFERRED binding is overridden by a non-DEFERRED one. */
13632 ensure_not_abstract_walker (gfc_symbol
* sub
, gfc_symtree
* st
)
13637 if (!ensure_not_abstract_walker (sub
, st
->left
))
13639 if (!ensure_not_abstract_walker (sub
, st
->right
))
13642 if (st
->n
.tb
&& st
->n
.tb
->deferred
)
13644 gfc_symtree
* overriding
;
13645 overriding
= gfc_find_typebound_proc (sub
, NULL
, st
->name
, true, NULL
);
13648 gcc_assert (overriding
->n
.tb
);
13649 if (overriding
->n
.tb
->deferred
)
13651 gfc_error ("Derived-type %qs declared at %L must be ABSTRACT because"
13652 " %qs is DEFERRED and not overridden",
13653 sub
->name
, &sub
->declared_at
, st
->name
);
13662 ensure_not_abstract (gfc_symbol
* sub
, gfc_symbol
* ancestor
)
13664 /* The algorithm used here is to recursively travel up the ancestry of sub
13665 and for each ancestor-type, check all bindings. If any of them is
13666 DEFERRED, look it up starting from sub and see if the found (overriding)
13667 binding is not DEFERRED.
13668 This is not the most efficient way to do this, but it should be ok and is
13669 clearer than something sophisticated. */
13671 gcc_assert (ancestor
&& !sub
->attr
.abstract
);
13673 if (!ancestor
->attr
.abstract
)
13676 /* Walk bindings of this ancestor. */
13677 if (ancestor
->f2k_derived
)
13680 t
= ensure_not_abstract_walker (sub
, ancestor
->f2k_derived
->tb_sym_root
);
13685 /* Find next ancestor type and recurse on it. */
13686 ancestor
= gfc_get_derived_super_type (ancestor
);
13688 return ensure_not_abstract (sub
, ancestor
);
13694 /* This check for typebound defined assignments is done recursively
13695 since the order in which derived types are resolved is not always in
13696 order of the declarations. */
13699 check_defined_assignments (gfc_symbol
*derived
)
13703 for (c
= derived
->components
; c
; c
= c
->next
)
13705 if (!gfc_bt_struct (c
->ts
.type
)
13707 || c
->attr
.allocatable
13708 || c
->attr
.proc_pointer_comp
13709 || c
->attr
.class_pointer
13710 || c
->attr
.proc_pointer
)
13713 if (c
->ts
.u
.derived
->attr
.defined_assign_comp
13714 || (c
->ts
.u
.derived
->f2k_derived
13715 && c
->ts
.u
.derived
->f2k_derived
->tb_op
[INTRINSIC_ASSIGN
]))
13717 derived
->attr
.defined_assign_comp
= 1;
13721 check_defined_assignments (c
->ts
.u
.derived
);
13722 if (c
->ts
.u
.derived
->attr
.defined_assign_comp
)
13724 derived
->attr
.defined_assign_comp
= 1;
13731 /* Resolve a single component of a derived type or structure. */
13734 resolve_component (gfc_component
*c
, gfc_symbol
*sym
)
13736 gfc_symbol
*super_type
;
13738 if (c
->attr
.artificial
)
13741 /* Do not allow vtype components to be resolved in nameless namespaces
13742 such as block data because the procedure pointers will cause ICEs
13743 and vtables are not needed in these contexts. */
13744 if (sym
->attr
.vtype
&& sym
->attr
.use_assoc
13745 && sym
->ns
->proc_name
== NULL
)
13749 if ((!sym
->attr
.is_class
|| c
!= sym
->components
)
13750 && c
->attr
.codimension
13751 && (!c
->attr
.allocatable
|| (c
->as
&& c
->as
->type
!= AS_DEFERRED
)))
13753 gfc_error ("Coarray component %qs at %L must be allocatable with "
13754 "deferred shape", c
->name
, &c
->loc
);
13759 if (c
->attr
.codimension
&& c
->ts
.type
== BT_DERIVED
13760 && c
->ts
.u
.derived
->ts
.is_iso_c
)
13762 gfc_error ("Component %qs at %L of TYPE(C_PTR) or TYPE(C_FUNPTR) "
13763 "shall not be a coarray", c
->name
, &c
->loc
);
13768 if (gfc_bt_struct (c
->ts
.type
) && c
->ts
.u
.derived
->attr
.coarray_comp
13769 && (c
->attr
.codimension
|| c
->attr
.pointer
|| c
->attr
.dimension
13770 || c
->attr
.allocatable
))
13772 gfc_error ("Component %qs at %L with coarray component "
13773 "shall be a nonpointer, nonallocatable scalar",
13779 if (c
->attr
.contiguous
&& (!c
->attr
.dimension
|| !c
->attr
.pointer
))
13781 gfc_error ("Component %qs at %L has the CONTIGUOUS attribute but "
13782 "is not an array pointer", c
->name
, &c
->loc
);
13786 /* F2003, 15.2.1 - length has to be one. */
13787 if (sym
->attr
.is_bind_c
&& c
->ts
.type
== BT_CHARACTER
13788 && (c
->ts
.u
.cl
== NULL
|| c
->ts
.u
.cl
->length
== NULL
13789 || !gfc_is_constant_expr (c
->ts
.u
.cl
->length
)
13790 || mpz_cmp_si (c
->ts
.u
.cl
->length
->value
.integer
, 1) != 0))
13792 gfc_error ("Component %qs of BIND(C) type at %L must have length one",
13797 if (c
->attr
.proc_pointer
&& c
->ts
.interface
)
13799 gfc_symbol
*ifc
= c
->ts
.interface
;
13801 if (!sym
->attr
.vtype
&& !check_proc_interface (ifc
, &c
->loc
))
13807 if (ifc
->attr
.if_source
|| ifc
->attr
.intrinsic
)
13809 /* Resolve interface and copy attributes. */
13810 if (ifc
->formal
&& !ifc
->formal_ns
)
13811 resolve_symbol (ifc
);
13812 if (ifc
->attr
.intrinsic
)
13813 gfc_resolve_intrinsic (ifc
, &ifc
->declared_at
);
13817 c
->ts
= ifc
->result
->ts
;
13818 c
->attr
.allocatable
= ifc
->result
->attr
.allocatable
;
13819 c
->attr
.pointer
= ifc
->result
->attr
.pointer
;
13820 c
->attr
.dimension
= ifc
->result
->attr
.dimension
;
13821 c
->as
= gfc_copy_array_spec (ifc
->result
->as
);
13822 c
->attr
.class_ok
= ifc
->result
->attr
.class_ok
;
13827 c
->attr
.allocatable
= ifc
->attr
.allocatable
;
13828 c
->attr
.pointer
= ifc
->attr
.pointer
;
13829 c
->attr
.dimension
= ifc
->attr
.dimension
;
13830 c
->as
= gfc_copy_array_spec (ifc
->as
);
13831 c
->attr
.class_ok
= ifc
->attr
.class_ok
;
13833 c
->ts
.interface
= ifc
;
13834 c
->attr
.function
= ifc
->attr
.function
;
13835 c
->attr
.subroutine
= ifc
->attr
.subroutine
;
13837 c
->attr
.pure
= ifc
->attr
.pure
;
13838 c
->attr
.elemental
= ifc
->attr
.elemental
;
13839 c
->attr
.recursive
= ifc
->attr
.recursive
;
13840 c
->attr
.always_explicit
= ifc
->attr
.always_explicit
;
13841 c
->attr
.ext_attr
|= ifc
->attr
.ext_attr
;
13842 /* Copy char length. */
13843 if (ifc
->ts
.type
== BT_CHARACTER
&& ifc
->ts
.u
.cl
)
13845 gfc_charlen
*cl
= gfc_new_charlen (sym
->ns
, ifc
->ts
.u
.cl
);
13846 if (cl
->length
&& !cl
->resolved
13847 && !gfc_resolve_expr (cl
->length
))
13856 else if (c
->attr
.proc_pointer
&& c
->ts
.type
== BT_UNKNOWN
)
13858 /* Since PPCs are not implicitly typed, a PPC without an explicit
13859 interface must be a subroutine. */
13860 gfc_add_subroutine (&c
->attr
, c
->name
, &c
->loc
);
13863 /* Procedure pointer components: Check PASS arg. */
13864 if (c
->attr
.proc_pointer
&& !c
->tb
->nopass
&& c
->tb
->pass_arg_num
== 0
13865 && !sym
->attr
.vtype
)
13867 gfc_symbol
* me_arg
;
13869 if (c
->tb
->pass_arg
)
13871 gfc_formal_arglist
* i
;
13873 /* If an explicit passing argument name is given, walk the arg-list
13874 and look for it. */
13877 c
->tb
->pass_arg_num
= 1;
13878 for (i
= c
->ts
.interface
->formal
; i
; i
= i
->next
)
13880 if (!strcmp (i
->sym
->name
, c
->tb
->pass_arg
))
13885 c
->tb
->pass_arg_num
++;
13890 gfc_error ("Procedure pointer component %qs with PASS(%s) "
13891 "at %L has no argument %qs", c
->name
,
13892 c
->tb
->pass_arg
, &c
->loc
, c
->tb
->pass_arg
);
13899 /* Otherwise, take the first one; there should in fact be at least
13901 c
->tb
->pass_arg_num
= 1;
13902 if (!c
->ts
.interface
->formal
)
13904 gfc_error ("Procedure pointer component %qs with PASS at %L "
13905 "must have at least one argument",
13910 me_arg
= c
->ts
.interface
->formal
->sym
;
13913 /* Now check that the argument-type matches. */
13914 gcc_assert (me_arg
);
13915 if ((me_arg
->ts
.type
!= BT_DERIVED
&& me_arg
->ts
.type
!= BT_CLASS
)
13916 || (me_arg
->ts
.type
== BT_DERIVED
&& me_arg
->ts
.u
.derived
!= sym
)
13917 || (me_arg
->ts
.type
== BT_CLASS
13918 && CLASS_DATA (me_arg
)->ts
.u
.derived
!= sym
))
13920 gfc_error ("Argument %qs of %qs with PASS(%s) at %L must be of"
13921 " the derived type %qs", me_arg
->name
, c
->name
,
13922 me_arg
->name
, &c
->loc
, sym
->name
);
13927 /* Check for F03:C453. */
13928 if (CLASS_DATA (me_arg
)->attr
.dimension
)
13930 gfc_error ("Argument %qs of %qs with PASS(%s) at %L "
13931 "must be scalar", me_arg
->name
, c
->name
, me_arg
->name
,
13937 if (CLASS_DATA (me_arg
)->attr
.class_pointer
)
13939 gfc_error ("Argument %qs of %qs with PASS(%s) at %L "
13940 "may not have the POINTER attribute", me_arg
->name
,
13941 c
->name
, me_arg
->name
, &c
->loc
);
13946 if (CLASS_DATA (me_arg
)->attr
.allocatable
)
13948 gfc_error ("Argument %qs of %qs with PASS(%s) at %L "
13949 "may not be ALLOCATABLE", me_arg
->name
, c
->name
,
13950 me_arg
->name
, &c
->loc
);
13955 if (gfc_type_is_extensible (sym
) && me_arg
->ts
.type
!= BT_CLASS
)
13957 gfc_error ("Non-polymorphic passed-object dummy argument of %qs"
13958 " at %L", c
->name
, &c
->loc
);
13964 /* Check type-spec if this is not the parent-type component. */
13965 if (((sym
->attr
.is_class
13966 && (!sym
->components
->ts
.u
.derived
->attr
.extension
13967 || c
!= sym
->components
->ts
.u
.derived
->components
))
13968 || (!sym
->attr
.is_class
13969 && (!sym
->attr
.extension
|| c
!= sym
->components
)))
13970 && !sym
->attr
.vtype
13971 && !resolve_typespec_used (&c
->ts
, &c
->loc
, c
->name
))
13974 super_type
= gfc_get_derived_super_type (sym
);
13976 /* If this type is an extension, set the accessibility of the parent
13979 && ((sym
->attr
.is_class
13980 && c
== sym
->components
->ts
.u
.derived
->components
)
13981 || (!sym
->attr
.is_class
&& c
== sym
->components
))
13982 && strcmp (super_type
->name
, c
->name
) == 0)
13983 c
->attr
.access
= super_type
->attr
.access
;
13985 /* If this type is an extension, see if this component has the same name
13986 as an inherited type-bound procedure. */
13987 if (super_type
&& !sym
->attr
.is_class
13988 && gfc_find_typebound_proc (super_type
, NULL
, c
->name
, true, NULL
))
13990 gfc_error ("Component %qs of %qs at %L has the same name as an"
13991 " inherited type-bound procedure",
13992 c
->name
, sym
->name
, &c
->loc
);
13996 if (c
->ts
.type
== BT_CHARACTER
&& !c
->attr
.proc_pointer
13997 && !c
->ts
.deferred
)
13999 if (c
->ts
.u
.cl
->length
== NULL
14000 || (!resolve_charlen(c
->ts
.u
.cl
))
14001 || !gfc_is_constant_expr (c
->ts
.u
.cl
->length
))
14003 gfc_error ("Character length of component %qs needs to "
14004 "be a constant specification expression at %L",
14006 c
->ts
.u
.cl
->length
? &c
->ts
.u
.cl
->length
->where
: &c
->loc
);
14011 if (c
->ts
.type
== BT_CHARACTER
&& c
->ts
.deferred
14012 && !c
->attr
.pointer
&& !c
->attr
.allocatable
)
14014 gfc_error ("Character component %qs of %qs at %L with deferred "
14015 "length must be a POINTER or ALLOCATABLE",
14016 c
->name
, sym
->name
, &c
->loc
);
14020 /* Add the hidden deferred length field. */
14021 if (c
->ts
.type
== BT_CHARACTER
14022 && (c
->ts
.deferred
|| c
->attr
.pdt_string
)
14023 && !c
->attr
.function
14024 && !sym
->attr
.is_class
)
14026 char name
[GFC_MAX_SYMBOL_LEN
+9];
14027 gfc_component
*strlen
;
14028 sprintf (name
, "_%s_length", c
->name
);
14029 strlen
= gfc_find_component (sym
, name
, true, true, NULL
);
14030 if (strlen
== NULL
)
14032 if (!gfc_add_component (sym
, name
, &strlen
))
14034 strlen
->ts
.type
= BT_INTEGER
;
14035 strlen
->ts
.kind
= gfc_charlen_int_kind
;
14036 strlen
->attr
.access
= ACCESS_PRIVATE
;
14037 strlen
->attr
.artificial
= 1;
14041 if (c
->ts
.type
== BT_DERIVED
14042 && sym
->component_access
!= ACCESS_PRIVATE
14043 && gfc_check_symbol_access (sym
)
14044 && !is_sym_host_assoc (c
->ts
.u
.derived
, sym
->ns
)
14045 && !c
->ts
.u
.derived
->attr
.use_assoc
14046 && !gfc_check_symbol_access (c
->ts
.u
.derived
)
14047 && !gfc_notify_std (GFC_STD_F2003
, "the component %qs is a "
14048 "PRIVATE type and cannot be a component of "
14049 "%qs, which is PUBLIC at %L", c
->name
,
14050 sym
->name
, &sym
->declared_at
))
14053 if ((sym
->attr
.sequence
|| sym
->attr
.is_bind_c
) && c
->ts
.type
== BT_CLASS
)
14055 gfc_error ("Polymorphic component %s at %L in SEQUENCE or BIND(C) "
14056 "type %s", c
->name
, &c
->loc
, sym
->name
);
14060 if (sym
->attr
.sequence
)
14062 if (c
->ts
.type
== BT_DERIVED
&& c
->ts
.u
.derived
->attr
.sequence
== 0)
14064 gfc_error ("Component %s of SEQUENCE type declared at %L does "
14065 "not have the SEQUENCE attribute",
14066 c
->ts
.u
.derived
->name
, &sym
->declared_at
);
14071 if (c
->ts
.type
== BT_DERIVED
&& c
->ts
.u
.derived
->attr
.generic
)
14072 c
->ts
.u
.derived
= gfc_find_dt_in_generic (c
->ts
.u
.derived
);
14073 else if (c
->ts
.type
== BT_CLASS
&& c
->attr
.class_ok
14074 && CLASS_DATA (c
)->ts
.u
.derived
->attr
.generic
)
14075 CLASS_DATA (c
)->ts
.u
.derived
14076 = gfc_find_dt_in_generic (CLASS_DATA (c
)->ts
.u
.derived
);
14078 /* If an allocatable component derived type is of the same type as
14079 the enclosing derived type, we need a vtable generating so that
14080 the __deallocate procedure is created. */
14081 if ((c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
14082 && c
->ts
.u
.derived
== sym
&& c
->attr
.allocatable
== 1)
14083 gfc_find_vtab (&c
->ts
);
14085 /* Ensure that all the derived type components are put on the
14086 derived type list; even in formal namespaces, where derived type
14087 pointer components might not have been declared. */
14088 if (c
->ts
.type
== BT_DERIVED
14090 && c
->ts
.u
.derived
->components
14092 && sym
!= c
->ts
.u
.derived
)
14093 add_dt_to_dt_list (c
->ts
.u
.derived
);
14095 if (!gfc_resolve_array_spec (c
->as
,
14096 !(c
->attr
.pointer
|| c
->attr
.proc_pointer
14097 || c
->attr
.allocatable
)))
14100 if (c
->initializer
&& !sym
->attr
.vtype
14101 && !c
->attr
.pdt_kind
&& !c
->attr
.pdt_len
14102 && !gfc_check_assign_symbol (sym
, c
, c
->initializer
))
14109 /* Be nice about the locus for a structure expression - show the locus of the
14110 first non-null sub-expression if we can. */
14113 cons_where (gfc_expr
*struct_expr
)
14115 gfc_constructor
*cons
;
14117 gcc_assert (struct_expr
&& struct_expr
->expr_type
== EXPR_STRUCTURE
);
14119 cons
= gfc_constructor_first (struct_expr
->value
.constructor
);
14120 for (; cons
; cons
= gfc_constructor_next (cons
))
14122 if (cons
->expr
&& cons
->expr
->expr_type
!= EXPR_NULL
)
14123 return &cons
->expr
->where
;
14126 return &struct_expr
->where
;
14129 /* Resolve the components of a structure type. Much less work than derived
14133 resolve_fl_struct (gfc_symbol
*sym
)
14136 gfc_expr
*init
= NULL
;
14139 /* Make sure UNIONs do not have overlapping initializers. */
14140 if (sym
->attr
.flavor
== FL_UNION
)
14142 for (c
= sym
->components
; c
; c
= c
->next
)
14144 if (init
&& c
->initializer
)
14146 gfc_error ("Conflicting initializers in union at %L and %L",
14147 cons_where (init
), cons_where (c
->initializer
));
14148 gfc_free_expr (c
->initializer
);
14149 c
->initializer
= NULL
;
14152 init
= c
->initializer
;
14157 for (c
= sym
->components
; c
; c
= c
->next
)
14158 if (!resolve_component (c
, sym
))
14164 if (sym
->components
)
14165 add_dt_to_dt_list (sym
);
14171 /* Resolve the components of a derived type. This does not have to wait until
14172 resolution stage, but can be done as soon as the dt declaration has been
14176 resolve_fl_derived0 (gfc_symbol
*sym
)
14178 gfc_symbol
* super_type
;
14180 gfc_formal_arglist
*f
;
14183 if (sym
->attr
.unlimited_polymorphic
)
14186 super_type
= gfc_get_derived_super_type (sym
);
14189 if (super_type
&& sym
->attr
.coarray_comp
&& !super_type
->attr
.coarray_comp
)
14191 gfc_error ("As extending type %qs at %L has a coarray component, "
14192 "parent type %qs shall also have one", sym
->name
,
14193 &sym
->declared_at
, super_type
->name
);
14197 /* Ensure the extended type gets resolved before we do. */
14198 if (super_type
&& !resolve_fl_derived0 (super_type
))
14201 /* An ABSTRACT type must be extensible. */
14202 if (sym
->attr
.abstract
&& !gfc_type_is_extensible (sym
))
14204 gfc_error ("Non-extensible derived-type %qs at %L must not be ABSTRACT",
14205 sym
->name
, &sym
->declared_at
);
14209 c
= (sym
->attr
.is_class
) ? sym
->components
->ts
.u
.derived
->components
14213 for ( ; c
!= NULL
; c
= c
->next
)
14214 if (!resolve_component (c
, sym
))
14220 /* Now add the caf token field, where needed. */
14221 if (flag_coarray
!= GFC_FCOARRAY_NONE
14222 && !sym
->attr
.is_class
&& !sym
->attr
.vtype
)
14224 for (c
= sym
->components
; c
; c
= c
->next
)
14225 if (!c
->attr
.dimension
&& !c
->attr
.codimension
14226 && (c
->attr
.allocatable
|| c
->attr
.pointer
))
14228 char name
[GFC_MAX_SYMBOL_LEN
+9];
14229 gfc_component
*token
;
14230 sprintf (name
, "_caf_%s", c
->name
);
14231 token
= gfc_find_component (sym
, name
, true, true, NULL
);
14234 if (!gfc_add_component (sym
, name
, &token
))
14236 token
->ts
.type
= BT_VOID
;
14237 token
->ts
.kind
= gfc_default_integer_kind
;
14238 token
->attr
.access
= ACCESS_PRIVATE
;
14239 token
->attr
.artificial
= 1;
14240 token
->attr
.caf_token
= 1;
14245 check_defined_assignments (sym
);
14247 if (!sym
->attr
.defined_assign_comp
&& super_type
)
14248 sym
->attr
.defined_assign_comp
14249 = super_type
->attr
.defined_assign_comp
;
14251 /* If this is a non-ABSTRACT type extending an ABSTRACT one, ensure that
14252 all DEFERRED bindings are overridden. */
14253 if (super_type
&& super_type
->attr
.abstract
&& !sym
->attr
.abstract
14254 && !sym
->attr
.is_class
14255 && !ensure_not_abstract (sym
, super_type
))
14258 /* Check that there is a component for every PDT parameter. */
14259 if (sym
->attr
.pdt_template
)
14261 for (f
= sym
->formal
; f
; f
= f
->next
)
14265 c
= gfc_find_component (sym
, f
->sym
->name
, true, true, NULL
);
14268 gfc_error ("Parameterized type %qs does not have a component "
14269 "corresponding to parameter %qs at %L", sym
->name
,
14270 f
->sym
->name
, &sym
->declared_at
);
14276 /* Add derived type to the derived type list. */
14277 add_dt_to_dt_list (sym
);
14283 /* The following procedure does the full resolution of a derived type,
14284 including resolution of all type-bound procedures (if present). In contrast
14285 to 'resolve_fl_derived0' this can only be done after the module has been
14286 parsed completely. */
14289 resolve_fl_derived (gfc_symbol
*sym
)
14291 gfc_symbol
*gen_dt
= NULL
;
14293 if (sym
->attr
.unlimited_polymorphic
)
14296 if (!sym
->attr
.is_class
)
14297 gfc_find_symbol (sym
->name
, sym
->ns
, 0, &gen_dt
);
14298 if (gen_dt
&& gen_dt
->generic
&& gen_dt
->generic
->next
14299 && (!gen_dt
->generic
->sym
->attr
.use_assoc
14300 || gen_dt
->generic
->sym
->module
!= gen_dt
->generic
->next
->sym
->module
)
14301 && !gfc_notify_std (GFC_STD_F2003
, "Generic name %qs of function "
14302 "%qs at %L being the same name as derived "
14303 "type at %L", sym
->name
,
14304 gen_dt
->generic
->sym
== sym
14305 ? gen_dt
->generic
->next
->sym
->name
14306 : gen_dt
->generic
->sym
->name
,
14307 gen_dt
->generic
->sym
== sym
14308 ? &gen_dt
->generic
->next
->sym
->declared_at
14309 : &gen_dt
->generic
->sym
->declared_at
,
14310 &sym
->declared_at
))
14313 if (sym
->components
== NULL
&& !sym
->attr
.zero_comp
&& !sym
->attr
.use_assoc
)
14315 gfc_error ("Derived type %qs at %L has not been declared",
14316 sym
->name
, &sym
->declared_at
);
14320 /* Resolve the finalizer procedures. */
14321 if (!gfc_resolve_finalizers (sym
, NULL
))
14324 if (sym
->attr
.is_class
&& sym
->ts
.u
.derived
== NULL
)
14326 /* Fix up incomplete CLASS symbols. */
14327 gfc_component
*data
= gfc_find_component (sym
, "_data", true, true, NULL
);
14328 gfc_component
*vptr
= gfc_find_component (sym
, "_vptr", true, true, NULL
);
14330 /* Nothing more to do for unlimited polymorphic entities. */
14331 if (data
->ts
.u
.derived
->attr
.unlimited_polymorphic
)
14333 else if (vptr
->ts
.u
.derived
== NULL
)
14335 gfc_symbol
*vtab
= gfc_find_derived_vtab (data
->ts
.u
.derived
);
14337 vptr
->ts
.u
.derived
= vtab
->ts
.u
.derived
;
14338 if (!resolve_fl_derived0 (vptr
->ts
.u
.derived
))
14343 if (!resolve_fl_derived0 (sym
))
14346 /* Resolve the type-bound procedures. */
14347 if (!resolve_typebound_procedures (sym
))
14350 /* Generate module vtables subject to their accessibility and their not
14351 being vtables or pdt templates. If this is not done class declarations
14352 in external procedures wind up with their own version and so SELECT TYPE
14353 fails because the vptrs do not have the same address. */
14354 if (gfc_option
.allow_std
& GFC_STD_F2003
14355 && sym
->ns
->proc_name
14356 && sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
14357 && sym
->attr
.access
!= ACCESS_PRIVATE
14358 && !(sym
->attr
.use_assoc
|| sym
->attr
.vtype
|| sym
->attr
.pdt_template
))
14360 gfc_symbol
*vtab
= gfc_find_derived_vtab (sym
);
14361 gfc_set_sym_referenced (vtab
);
14369 resolve_fl_namelist (gfc_symbol
*sym
)
14374 for (nl
= sym
->namelist
; nl
; nl
= nl
->next
)
14376 /* Check again, the check in match only works if NAMELIST comes
14378 if (nl
->sym
->as
&& nl
->sym
->as
->type
== AS_ASSUMED_SIZE
)
14380 gfc_error ("Assumed size array %qs in namelist %qs at %L is not "
14381 "allowed", nl
->sym
->name
, sym
->name
, &sym
->declared_at
);
14385 if (nl
->sym
->as
&& nl
->sym
->as
->type
== AS_ASSUMED_SHAPE
14386 && !gfc_notify_std (GFC_STD_F2003
, "NAMELIST array object %qs "
14387 "with assumed shape in namelist %qs at %L",
14388 nl
->sym
->name
, sym
->name
, &sym
->declared_at
))
14391 if (is_non_constant_shape_array (nl
->sym
)
14392 && !gfc_notify_std (GFC_STD_F2003
, "NAMELIST array object %qs "
14393 "with nonconstant shape in namelist %qs at %L",
14394 nl
->sym
->name
, sym
->name
, &sym
->declared_at
))
14397 if (nl
->sym
->ts
.type
== BT_CHARACTER
14398 && (nl
->sym
->ts
.u
.cl
->length
== NULL
14399 || !gfc_is_constant_expr (nl
->sym
->ts
.u
.cl
->length
))
14400 && !gfc_notify_std (GFC_STD_F2003
, "NAMELIST object %qs with "
14401 "nonconstant character length in "
14402 "namelist %qs at %L", nl
->sym
->name
,
14403 sym
->name
, &sym
->declared_at
))
14408 /* Reject PRIVATE objects in a PUBLIC namelist. */
14409 if (gfc_check_symbol_access (sym
))
14411 for (nl
= sym
->namelist
; nl
; nl
= nl
->next
)
14413 if (!nl
->sym
->attr
.use_assoc
14414 && !is_sym_host_assoc (nl
->sym
, sym
->ns
)
14415 && !gfc_check_symbol_access (nl
->sym
))
14417 gfc_error ("NAMELIST object %qs was declared PRIVATE and "
14418 "cannot be member of PUBLIC namelist %qs at %L",
14419 nl
->sym
->name
, sym
->name
, &sym
->declared_at
);
14423 if (nl
->sym
->ts
.type
== BT_DERIVED
14424 && (nl
->sym
->ts
.u
.derived
->attr
.alloc_comp
14425 || nl
->sym
->ts
.u
.derived
->attr
.pointer_comp
))
14427 if (!gfc_notify_std (GFC_STD_F2003
, "NAMELIST object %qs in "
14428 "namelist %qs at %L with ALLOCATABLE "
14429 "or POINTER components", nl
->sym
->name
,
14430 sym
->name
, &sym
->declared_at
))
14435 /* Types with private components that came here by USE-association. */
14436 if (nl
->sym
->ts
.type
== BT_DERIVED
14437 && derived_inaccessible (nl
->sym
->ts
.u
.derived
))
14439 gfc_error ("NAMELIST object %qs has use-associated PRIVATE "
14440 "components and cannot be member of namelist %qs at %L",
14441 nl
->sym
->name
, sym
->name
, &sym
->declared_at
);
14445 /* Types with private components that are defined in the same module. */
14446 if (nl
->sym
->ts
.type
== BT_DERIVED
14447 && !is_sym_host_assoc (nl
->sym
->ts
.u
.derived
, sym
->ns
)
14448 && nl
->sym
->ts
.u
.derived
->attr
.private_comp
)
14450 gfc_error ("NAMELIST object %qs has PRIVATE components and "
14451 "cannot be a member of PUBLIC namelist %qs at %L",
14452 nl
->sym
->name
, sym
->name
, &sym
->declared_at
);
14459 /* 14.1.2 A module or internal procedure represent local entities
14460 of the same type as a namelist member and so are not allowed. */
14461 for (nl
= sym
->namelist
; nl
; nl
= nl
->next
)
14463 if (nl
->sym
->ts
.kind
!= 0 && nl
->sym
->attr
.flavor
== FL_VARIABLE
)
14466 if (nl
->sym
->attr
.function
&& nl
->sym
== nl
->sym
->result
)
14467 if ((nl
->sym
== sym
->ns
->proc_name
)
14469 (sym
->ns
->parent
&& nl
->sym
== sym
->ns
->parent
->proc_name
))
14474 gfc_find_symbol (nl
->sym
->name
, sym
->ns
, 1, &nlsym
);
14475 if (nlsym
&& nlsym
->attr
.flavor
== FL_PROCEDURE
)
14477 gfc_error ("PROCEDURE attribute conflicts with NAMELIST "
14478 "attribute in %qs at %L", nlsym
->name
,
14479 &sym
->declared_at
);
14486 for (nl
= sym
->namelist
; nl
; nl
= nl
->next
)
14487 nl
->sym
->attr
.asynchronous
= 1;
14494 resolve_fl_parameter (gfc_symbol
*sym
)
14496 /* A parameter array's shape needs to be constant. */
14497 if (sym
->as
!= NULL
14498 && (sym
->as
->type
== AS_DEFERRED
14499 || is_non_constant_shape_array (sym
)))
14501 gfc_error ("Parameter array %qs at %L cannot be automatic "
14502 "or of deferred shape", sym
->name
, &sym
->declared_at
);
14506 /* Constraints on deferred type parameter. */
14507 if (!deferred_requirements (sym
))
14510 /* Make sure a parameter that has been implicitly typed still
14511 matches the implicit type, since PARAMETER statements can precede
14512 IMPLICIT statements. */
14513 if (sym
->attr
.implicit_type
14514 && !gfc_compare_types (&sym
->ts
, gfc_get_default_type (sym
->name
,
14517 gfc_error ("Implicitly typed PARAMETER %qs at %L doesn't match a "
14518 "later IMPLICIT type", sym
->name
, &sym
->declared_at
);
14522 /* Make sure the types of derived parameters are consistent. This
14523 type checking is deferred until resolution because the type may
14524 refer to a derived type from the host. */
14525 if (sym
->ts
.type
== BT_DERIVED
14526 && !gfc_compare_types (&sym
->ts
, &sym
->value
->ts
))
14528 gfc_error ("Incompatible derived type in PARAMETER at %L",
14529 &sym
->value
->where
);
14533 /* F03:C509,C514. */
14534 if (sym
->ts
.type
== BT_CLASS
)
14536 gfc_error ("CLASS variable %qs at %L cannot have the PARAMETER attribute",
14537 sym
->name
, &sym
->declared_at
);
14545 /* Called by resolve_symbol to check PDTs. */
14548 resolve_pdt (gfc_symbol
* sym
)
14550 gfc_symbol
*derived
= NULL
;
14551 gfc_actual_arglist
*param
;
14553 bool const_len_exprs
= true;
14554 bool assumed_len_exprs
= false;
14555 symbol_attribute
*attr
;
14557 if (sym
->ts
.type
== BT_DERIVED
)
14559 derived
= sym
->ts
.u
.derived
;
14560 attr
= &(sym
->attr
);
14562 else if (sym
->ts
.type
== BT_CLASS
)
14564 derived
= CLASS_DATA (sym
)->ts
.u
.derived
;
14565 attr
= &(CLASS_DATA (sym
)->attr
);
14568 gcc_unreachable ();
14570 gcc_assert (derived
->attr
.pdt_type
);
14572 for (param
= sym
->param_list
; param
; param
= param
->next
)
14574 c
= gfc_find_component (derived
, param
->name
, false, true, NULL
);
14576 if (c
->attr
.pdt_kind
)
14579 if (param
->expr
&& !gfc_is_constant_expr (param
->expr
)
14580 && c
->attr
.pdt_len
)
14581 const_len_exprs
= false;
14582 else if (param
->spec_type
== SPEC_ASSUMED
)
14583 assumed_len_exprs
= true;
14585 if (param
->spec_type
== SPEC_DEFERRED
14586 && !attr
->allocatable
&& !attr
->pointer
)
14587 gfc_error ("The object %qs at %L has a deferred LEN "
14588 "parameter %qs and is neither allocatable "
14589 "nor a pointer", sym
->name
, &sym
->declared_at
,
14594 if (!const_len_exprs
14595 && (sym
->ns
->proc_name
->attr
.is_main_program
14596 || sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
14597 || sym
->attr
.save
!= SAVE_NONE
))
14598 gfc_error ("The AUTOMATIC object %qs at %L must not have the "
14599 "SAVE attribute or be a variable declared in the "
14600 "main program, a module or a submodule(F08/C513)",
14601 sym
->name
, &sym
->declared_at
);
14603 if (assumed_len_exprs
&& !(sym
->attr
.dummy
14604 || sym
->attr
.select_type_temporary
|| sym
->attr
.associate_var
))
14605 gfc_error ("The object %qs at %L with ASSUMED type parameters "
14606 "must be a dummy or a SELECT TYPE selector(F08/4.2)",
14607 sym
->name
, &sym
->declared_at
);
14611 /* Do anything necessary to resolve a symbol. Right now, we just
14612 assume that an otherwise unknown symbol is a variable. This sort
14613 of thing commonly happens for symbols in module. */
14616 resolve_symbol (gfc_symbol
*sym
)
14618 int check_constant
, mp_flag
;
14619 gfc_symtree
*symtree
;
14620 gfc_symtree
*this_symtree
;
14623 symbol_attribute class_attr
;
14624 gfc_array_spec
*as
;
14625 bool saved_specification_expr
;
14631 /* No symbol will ever have union type; only components can be unions.
14632 Union type declaration symbols have type BT_UNKNOWN but flavor FL_UNION
14633 (just like derived type declaration symbols have flavor FL_DERIVED). */
14634 gcc_assert (sym
->ts
.type
!= BT_UNION
);
14636 /* Coarrayed polymorphic objects with allocatable or pointer components are
14637 yet unsupported for -fcoarray=lib. */
14638 if (flag_coarray
== GFC_FCOARRAY_LIB
&& sym
->ts
.type
== BT_CLASS
14639 && sym
->ts
.u
.derived
&& CLASS_DATA (sym
)
14640 && CLASS_DATA (sym
)->attr
.codimension
14641 && (CLASS_DATA (sym
)->ts
.u
.derived
->attr
.alloc_comp
14642 || CLASS_DATA (sym
)->ts
.u
.derived
->attr
.pointer_comp
))
14644 gfc_error ("Sorry, allocatable/pointer components in polymorphic (CLASS) "
14645 "type coarrays at %L are unsupported", &sym
->declared_at
);
14649 if (sym
->attr
.artificial
)
14652 if (sym
->attr
.unlimited_polymorphic
)
14655 if (sym
->attr
.flavor
== FL_UNKNOWN
14656 || (sym
->attr
.flavor
== FL_PROCEDURE
&& !sym
->attr
.intrinsic
14657 && !sym
->attr
.generic
&& !sym
->attr
.external
14658 && sym
->attr
.if_source
== IFSRC_UNKNOWN
14659 && sym
->ts
.type
== BT_UNKNOWN
))
14662 /* If we find that a flavorless symbol is an interface in one of the
14663 parent namespaces, find its symtree in this namespace, free the
14664 symbol and set the symtree to point to the interface symbol. */
14665 for (ns
= gfc_current_ns
->parent
; ns
; ns
= ns
->parent
)
14667 symtree
= gfc_find_symtree (ns
->sym_root
, sym
->name
);
14668 if (symtree
&& (symtree
->n
.sym
->generic
||
14669 (symtree
->n
.sym
->attr
.flavor
== FL_PROCEDURE
14670 && sym
->ns
->construct_entities
)))
14672 this_symtree
= gfc_find_symtree (gfc_current_ns
->sym_root
,
14674 if (this_symtree
->n
.sym
== sym
)
14676 symtree
->n
.sym
->refs
++;
14677 gfc_release_symbol (sym
);
14678 this_symtree
->n
.sym
= symtree
->n
.sym
;
14684 /* Otherwise give it a flavor according to such attributes as
14686 if (sym
->attr
.flavor
== FL_UNKNOWN
&& sym
->attr
.external
== 0
14687 && sym
->attr
.intrinsic
== 0)
14688 sym
->attr
.flavor
= FL_VARIABLE
;
14689 else if (sym
->attr
.flavor
== FL_UNKNOWN
)
14691 sym
->attr
.flavor
= FL_PROCEDURE
;
14692 if (sym
->attr
.dimension
)
14693 sym
->attr
.function
= 1;
14697 if (sym
->attr
.external
&& sym
->ts
.type
!= BT_UNKNOWN
&& !sym
->attr
.function
)
14698 gfc_add_function (&sym
->attr
, sym
->name
, &sym
->declared_at
);
14700 if (sym
->attr
.procedure
&& sym
->attr
.if_source
!= IFSRC_DECL
14701 && !resolve_procedure_interface (sym
))
14704 if (sym
->attr
.is_protected
&& !sym
->attr
.proc_pointer
14705 && (sym
->attr
.procedure
|| sym
->attr
.external
))
14707 if (sym
->attr
.external
)
14708 gfc_error ("PROTECTED attribute conflicts with EXTERNAL attribute "
14709 "at %L", &sym
->declared_at
);
14711 gfc_error ("PROCEDURE attribute conflicts with PROTECTED attribute "
14712 "at %L", &sym
->declared_at
);
14717 if (sym
->attr
.flavor
== FL_DERIVED
&& !resolve_fl_derived (sym
))
14720 else if ((sym
->attr
.flavor
== FL_STRUCT
|| sym
->attr
.flavor
== FL_UNION
)
14721 && !resolve_fl_struct (sym
))
14724 /* Symbols that are module procedures with results (functions) have
14725 the types and array specification copied for type checking in
14726 procedures that call them, as well as for saving to a module
14727 file. These symbols can't stand the scrutiny that their results
14729 mp_flag
= (sym
->result
!= NULL
&& sym
->result
!= sym
);
14731 /* Make sure that the intrinsic is consistent with its internal
14732 representation. This needs to be done before assigning a default
14733 type to avoid spurious warnings. */
14734 if (sym
->attr
.flavor
!= FL_MODULE
&& sym
->attr
.intrinsic
14735 && !gfc_resolve_intrinsic (sym
, &sym
->declared_at
))
14738 /* Resolve associate names. */
14740 resolve_assoc_var (sym
, true);
14742 /* Assign default type to symbols that need one and don't have one. */
14743 if (sym
->ts
.type
== BT_UNKNOWN
)
14745 if (sym
->attr
.flavor
== FL_VARIABLE
|| sym
->attr
.flavor
== FL_PARAMETER
)
14747 gfc_set_default_type (sym
, 1, NULL
);
14750 if (sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.external
14751 && !sym
->attr
.function
&& !sym
->attr
.subroutine
14752 && gfc_get_default_type (sym
->name
, sym
->ns
)->type
== BT_UNKNOWN
)
14753 gfc_add_subroutine (&sym
->attr
, sym
->name
, &sym
->declared_at
);
14755 if (sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.function
)
14757 /* The specific case of an external procedure should emit an error
14758 in the case that there is no implicit type. */
14761 if (!sym
->attr
.mixed_entry_master
)
14762 gfc_set_default_type (sym
, sym
->attr
.external
, NULL
);
14766 /* Result may be in another namespace. */
14767 resolve_symbol (sym
->result
);
14769 if (!sym
->result
->attr
.proc_pointer
)
14771 sym
->ts
= sym
->result
->ts
;
14772 sym
->as
= gfc_copy_array_spec (sym
->result
->as
);
14773 sym
->attr
.dimension
= sym
->result
->attr
.dimension
;
14774 sym
->attr
.pointer
= sym
->result
->attr
.pointer
;
14775 sym
->attr
.allocatable
= sym
->result
->attr
.allocatable
;
14776 sym
->attr
.contiguous
= sym
->result
->attr
.contiguous
;
14781 else if (mp_flag
&& sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.function
)
14783 bool saved_specification_expr
= specification_expr
;
14784 specification_expr
= true;
14785 gfc_resolve_array_spec (sym
->result
->as
, false);
14786 specification_expr
= saved_specification_expr
;
14789 if (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
)
14791 as
= CLASS_DATA (sym
)->as
;
14792 class_attr
= CLASS_DATA (sym
)->attr
;
14793 class_attr
.pointer
= class_attr
.class_pointer
;
14797 class_attr
= sym
->attr
;
14802 if (sym
->attr
.contiguous
14803 && (!class_attr
.dimension
14804 || (as
->type
!= AS_ASSUMED_SHAPE
&& as
->type
!= AS_ASSUMED_RANK
14805 && !class_attr
.pointer
)))
14807 gfc_error ("%qs at %L has the CONTIGUOUS attribute but is not an "
14808 "array pointer or an assumed-shape or assumed-rank array",
14809 sym
->name
, &sym
->declared_at
);
14813 /* Assumed size arrays and assumed shape arrays must be dummy
14814 arguments. Array-spec's of implied-shape should have been resolved to
14815 AS_EXPLICIT already. */
14819 /* If AS_IMPLIED_SHAPE makes it to here, it must be a bad
14820 specification expression. */
14821 if (as
->type
== AS_IMPLIED_SHAPE
)
14824 for (i
=0; i
<as
->rank
; i
++)
14826 if (as
->lower
[i
] != NULL
&& as
->upper
[i
] == NULL
)
14828 gfc_error ("Bad specification for assumed size array at %L",
14829 &as
->lower
[i
]->where
);
14836 if (((as
->type
== AS_ASSUMED_SIZE
&& !as
->cp_was_assumed
)
14837 || as
->type
== AS_ASSUMED_SHAPE
)
14838 && !sym
->attr
.dummy
&& !sym
->attr
.select_type_temporary
)
14840 if (as
->type
== AS_ASSUMED_SIZE
)
14841 gfc_error ("Assumed size array at %L must be a dummy argument",
14842 &sym
->declared_at
);
14844 gfc_error ("Assumed shape array at %L must be a dummy argument",
14845 &sym
->declared_at
);
14848 /* TS 29113, C535a. */
14849 if (as
->type
== AS_ASSUMED_RANK
&& !sym
->attr
.dummy
14850 && !sym
->attr
.select_type_temporary
)
14852 gfc_error ("Assumed-rank array at %L must be a dummy argument",
14853 &sym
->declared_at
);
14856 if (as
->type
== AS_ASSUMED_RANK
14857 && (sym
->attr
.codimension
|| sym
->attr
.value
))
14859 gfc_error ("Assumed-rank array at %L may not have the VALUE or "
14860 "CODIMENSION attribute", &sym
->declared_at
);
14865 /* Make sure symbols with known intent or optional are really dummy
14866 variable. Because of ENTRY statement, this has to be deferred
14867 until resolution time. */
14869 if (!sym
->attr
.dummy
14870 && (sym
->attr
.optional
|| sym
->attr
.intent
!= INTENT_UNKNOWN
))
14872 gfc_error ("Symbol at %L is not a DUMMY variable", &sym
->declared_at
);
14876 if (sym
->attr
.value
&& !sym
->attr
.dummy
)
14878 gfc_error ("%qs at %L cannot have the VALUE attribute because "
14879 "it is not a dummy argument", sym
->name
, &sym
->declared_at
);
14883 if (sym
->attr
.value
&& sym
->ts
.type
== BT_CHARACTER
)
14885 gfc_charlen
*cl
= sym
->ts
.u
.cl
;
14886 if (!cl
|| !cl
->length
|| cl
->length
->expr_type
!= EXPR_CONSTANT
)
14888 gfc_error ("Character dummy variable %qs at %L with VALUE "
14889 "attribute must have constant length",
14890 sym
->name
, &sym
->declared_at
);
14894 if (sym
->ts
.is_c_interop
14895 && mpz_cmp_si (cl
->length
->value
.integer
, 1) != 0)
14897 gfc_error ("C interoperable character dummy variable %qs at %L "
14898 "with VALUE attribute must have length one",
14899 sym
->name
, &sym
->declared_at
);
14904 if (sym
->ts
.type
== BT_DERIVED
&& !sym
->attr
.is_iso_c
14905 && sym
->ts
.u
.derived
->attr
.generic
)
14907 sym
->ts
.u
.derived
= gfc_find_dt_in_generic (sym
->ts
.u
.derived
);
14908 if (!sym
->ts
.u
.derived
)
14910 gfc_error ("The derived type %qs at %L is of type %qs, "
14911 "which has not been defined", sym
->name
,
14912 &sym
->declared_at
, sym
->ts
.u
.derived
->name
);
14913 sym
->ts
.type
= BT_UNKNOWN
;
14918 /* Use the same constraints as TYPE(*), except for the type check
14919 and that only scalars and assumed-size arrays are permitted. */
14920 if (sym
->attr
.ext_attr
& (1 << EXT_ATTR_NO_ARG_CHECK
))
14922 if (!sym
->attr
.dummy
)
14924 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute shall be "
14925 "a dummy argument", sym
->name
, &sym
->declared_at
);
14929 if (sym
->ts
.type
!= BT_ASSUMED
&& sym
->ts
.type
!= BT_INTEGER
14930 && sym
->ts
.type
!= BT_REAL
&& sym
->ts
.type
!= BT_LOGICAL
14931 && sym
->ts
.type
!= BT_COMPLEX
)
14933 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute shall be "
14934 "of type TYPE(*) or of an numeric intrinsic type",
14935 sym
->name
, &sym
->declared_at
);
14939 if (sym
->attr
.allocatable
|| sym
->attr
.codimension
14940 || sym
->attr
.pointer
|| sym
->attr
.value
)
14942 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute may not "
14943 "have the ALLOCATABLE, CODIMENSION, POINTER or VALUE "
14944 "attribute", sym
->name
, &sym
->declared_at
);
14948 if (sym
->attr
.intent
== INTENT_OUT
)
14950 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute may not "
14951 "have the INTENT(OUT) attribute",
14952 sym
->name
, &sym
->declared_at
);
14955 if (sym
->attr
.dimension
&& sym
->as
->type
!= AS_ASSUMED_SIZE
)
14957 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute shall "
14958 "either be a scalar or an assumed-size array",
14959 sym
->name
, &sym
->declared_at
);
14963 /* Set the type to TYPE(*) and add a dimension(*) to ensure
14964 NO_ARG_CHECK is correctly handled in trans*.c, e.g. with
14966 sym
->ts
.type
= BT_ASSUMED
;
14967 sym
->as
= gfc_get_array_spec ();
14968 sym
->as
->type
= AS_ASSUMED_SIZE
;
14970 sym
->as
->lower
[0] = gfc_get_int_expr (gfc_default_integer_kind
, NULL
, 1);
14972 else if (sym
->ts
.type
== BT_ASSUMED
)
14974 /* TS 29113, C407a. */
14975 if (!sym
->attr
.dummy
)
14977 gfc_error ("Assumed type of variable %s at %L is only permitted "
14978 "for dummy variables", sym
->name
, &sym
->declared_at
);
14981 if (sym
->attr
.allocatable
|| sym
->attr
.codimension
14982 || sym
->attr
.pointer
|| sym
->attr
.value
)
14984 gfc_error ("Assumed-type variable %s at %L may not have the "
14985 "ALLOCATABLE, CODIMENSION, POINTER or VALUE attribute",
14986 sym
->name
, &sym
->declared_at
);
14989 if (sym
->attr
.intent
== INTENT_OUT
)
14991 gfc_error ("Assumed-type variable %s at %L may not have the "
14992 "INTENT(OUT) attribute",
14993 sym
->name
, &sym
->declared_at
);
14996 if (sym
->attr
.dimension
&& sym
->as
->type
== AS_EXPLICIT
)
14998 gfc_error ("Assumed-type variable %s at %L shall not be an "
14999 "explicit-shape array", sym
->name
, &sym
->declared_at
);
15004 /* If the symbol is marked as bind(c), that it is declared at module level
15005 scope and verify its type and kind. Do not do the latter for symbols
15006 that are implicitly typed because that is handled in
15007 gfc_set_default_type. Handle dummy arguments and procedure definitions
15008 separately. Also, anything that is use associated is not handled here
15009 but instead is handled in the module it is declared in. Finally, derived
15010 type definitions are allowed to be BIND(C) since that only implies that
15011 they're interoperable, and they are checked fully for interoperability
15012 when a variable is declared of that type. */
15013 if (sym
->attr
.is_bind_c
&& sym
->attr
.use_assoc
== 0
15014 && sym
->attr
.dummy
== 0 && sym
->attr
.flavor
!= FL_PROCEDURE
15015 && sym
->attr
.flavor
!= FL_DERIVED
)
15019 /* First, make sure the variable is declared at the
15020 module-level scope (J3/04-007, Section 15.3). */
15021 if (sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
&&
15022 sym
->attr
.in_common
== 0)
15024 gfc_error ("Variable %qs at %L cannot be BIND(C) because it "
15025 "is neither a COMMON block nor declared at the "
15026 "module level scope", sym
->name
, &(sym
->declared_at
));
15029 else if (sym
->ts
.type
== BT_CHARACTER
15030 && (sym
->ts
.u
.cl
== NULL
|| sym
->ts
.u
.cl
->length
== NULL
15031 || !gfc_is_constant_expr (sym
->ts
.u
.cl
->length
)
15032 || mpz_cmp_si (sym
->ts
.u
.cl
->length
->value
.integer
, 1) != 0))
15034 gfc_error ("BIND(C) Variable %qs at %L must have length one",
15035 sym
->name
, &sym
->declared_at
);
15038 else if (sym
->common_head
!= NULL
&& sym
->attr
.implicit_type
== 0)
15040 t
= verify_com_block_vars_c_interop (sym
->common_head
);
15042 else if (sym
->attr
.implicit_type
== 0)
15044 /* If type() declaration, we need to verify that the components
15045 of the given type are all C interoperable, etc. */
15046 if (sym
->ts
.type
== BT_DERIVED
&&
15047 sym
->ts
.u
.derived
->attr
.is_c_interop
!= 1)
15049 /* Make sure the user marked the derived type as BIND(C). If
15050 not, call the verify routine. This could print an error
15051 for the derived type more than once if multiple variables
15052 of that type are declared. */
15053 if (sym
->ts
.u
.derived
->attr
.is_bind_c
!= 1)
15054 verify_bind_c_derived_type (sym
->ts
.u
.derived
);
15058 /* Verify the variable itself as C interoperable if it
15059 is BIND(C). It is not possible for this to succeed if
15060 the verify_bind_c_derived_type failed, so don't have to handle
15061 any error returned by verify_bind_c_derived_type. */
15062 t
= verify_bind_c_sym (sym
, &(sym
->ts
), sym
->attr
.in_common
,
15063 sym
->common_block
);
15068 /* clear the is_bind_c flag to prevent reporting errors more than
15069 once if something failed. */
15070 sym
->attr
.is_bind_c
= 0;
15075 /* If a derived type symbol has reached this point, without its
15076 type being declared, we have an error. Notice that most
15077 conditions that produce undefined derived types have already
15078 been dealt with. However, the likes of:
15079 implicit type(t) (t) ..... call foo (t) will get us here if
15080 the type is not declared in the scope of the implicit
15081 statement. Change the type to BT_UNKNOWN, both because it is so
15082 and to prevent an ICE. */
15083 if (sym
->ts
.type
== BT_DERIVED
&& !sym
->attr
.is_iso_c
15084 && sym
->ts
.u
.derived
->components
== NULL
15085 && !sym
->ts
.u
.derived
->attr
.zero_comp
)
15087 gfc_error ("The derived type %qs at %L is of type %qs, "
15088 "which has not been defined", sym
->name
,
15089 &sym
->declared_at
, sym
->ts
.u
.derived
->name
);
15090 sym
->ts
.type
= BT_UNKNOWN
;
15094 /* Make sure that the derived type has been resolved and that the
15095 derived type is visible in the symbol's namespace, if it is a
15096 module function and is not PRIVATE. */
15097 if (sym
->ts
.type
== BT_DERIVED
15098 && sym
->ts
.u
.derived
->attr
.use_assoc
15099 && sym
->ns
->proc_name
15100 && sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
15101 && !resolve_fl_derived (sym
->ts
.u
.derived
))
15104 /* Unless the derived-type declaration is use associated, Fortran 95
15105 does not allow public entries of private derived types.
15106 See 4.4.1 (F95) and 4.5.1.1 (F2003); and related interpretation
15107 161 in 95-006r3. */
15108 if (sym
->ts
.type
== BT_DERIVED
15109 && sym
->ns
->proc_name
&& sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
15110 && !sym
->ts
.u
.derived
->attr
.use_assoc
15111 && gfc_check_symbol_access (sym
)
15112 && !gfc_check_symbol_access (sym
->ts
.u
.derived
)
15113 && !gfc_notify_std (GFC_STD_F2003
, "PUBLIC %s %qs at %L of PRIVATE "
15114 "derived type %qs",
15115 (sym
->attr
.flavor
== FL_PARAMETER
)
15116 ? "parameter" : "variable",
15117 sym
->name
, &sym
->declared_at
,
15118 sym
->ts
.u
.derived
->name
))
15121 /* F2008, C1302. */
15122 if (sym
->ts
.type
== BT_DERIVED
15123 && ((sym
->ts
.u
.derived
->from_intmod
== INTMOD_ISO_FORTRAN_ENV
15124 && sym
->ts
.u
.derived
->intmod_sym_id
== ISOFORTRAN_LOCK_TYPE
)
15125 || sym
->ts
.u
.derived
->attr
.lock_comp
)
15126 && !sym
->attr
.codimension
&& !sym
->ts
.u
.derived
->attr
.coarray_comp
)
15128 gfc_error ("Variable %s at %L of type LOCK_TYPE or with subcomponent of "
15129 "type LOCK_TYPE must be a coarray", sym
->name
,
15130 &sym
->declared_at
);
15134 /* TS18508, C702/C703. */
15135 if (sym
->ts
.type
== BT_DERIVED
15136 && ((sym
->ts
.u
.derived
->from_intmod
== INTMOD_ISO_FORTRAN_ENV
15137 && sym
->ts
.u
.derived
->intmod_sym_id
== ISOFORTRAN_EVENT_TYPE
)
15138 || sym
->ts
.u
.derived
->attr
.event_comp
)
15139 && !sym
->attr
.codimension
&& !sym
->ts
.u
.derived
->attr
.coarray_comp
)
15141 gfc_error ("Variable %s at %L of type EVENT_TYPE or with subcomponent of "
15142 "type EVENT_TYPE must be a coarray", sym
->name
,
15143 &sym
->declared_at
);
15147 /* An assumed-size array with INTENT(OUT) shall not be of a type for which
15148 default initialization is defined (5.1.2.4.4). */
15149 if (sym
->ts
.type
== BT_DERIVED
15151 && sym
->attr
.intent
== INTENT_OUT
15153 && sym
->as
->type
== AS_ASSUMED_SIZE
)
15155 for (c
= sym
->ts
.u
.derived
->components
; c
; c
= c
->next
)
15157 if (c
->initializer
)
15159 gfc_error ("The INTENT(OUT) dummy argument %qs at %L is "
15160 "ASSUMED SIZE and so cannot have a default initializer",
15161 sym
->name
, &sym
->declared_at
);
15168 if (sym
->ts
.type
== BT_DERIVED
&& sym
->attr
.dummy
15169 && sym
->attr
.intent
== INTENT_OUT
&& sym
->attr
.lock_comp
)
15171 gfc_error ("Dummy argument %qs at %L of LOCK_TYPE shall not be "
15172 "INTENT(OUT)", sym
->name
, &sym
->declared_at
);
15177 if (sym
->ts
.type
== BT_DERIVED
&& sym
->attr
.dummy
15178 && sym
->attr
.intent
== INTENT_OUT
&& sym
->attr
.event_comp
)
15180 gfc_error ("Dummy argument %qs at %L of EVENT_TYPE shall not be "
15181 "INTENT(OUT)", sym
->name
, &sym
->declared_at
);
15186 if ((((sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
->attr
.coarray_comp
)
15187 || (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
15188 && CLASS_DATA (sym
)->attr
.coarray_comp
))
15189 || class_attr
.codimension
)
15190 && (sym
->attr
.result
|| sym
->result
== sym
))
15192 gfc_error ("Function result %qs at %L shall not be a coarray or have "
15193 "a coarray component", sym
->name
, &sym
->declared_at
);
15198 if (sym
->attr
.codimension
&& sym
->ts
.type
== BT_DERIVED
15199 && sym
->ts
.u
.derived
->ts
.is_iso_c
)
15201 gfc_error ("Variable %qs at %L of TYPE(C_PTR) or TYPE(C_FUNPTR) "
15202 "shall not be a coarray", sym
->name
, &sym
->declared_at
);
15207 if (((sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
->attr
.coarray_comp
)
15208 || (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
15209 && CLASS_DATA (sym
)->attr
.coarray_comp
))
15210 && (class_attr
.codimension
|| class_attr
.pointer
|| class_attr
.dimension
15211 || class_attr
.allocatable
))
15213 gfc_error ("Variable %qs at %L with coarray component shall be a "
15214 "nonpointer, nonallocatable scalar, which is not a coarray",
15215 sym
->name
, &sym
->declared_at
);
15219 /* F2008, C526. The function-result case was handled above. */
15220 if (class_attr
.codimension
15221 && !(class_attr
.allocatable
|| sym
->attr
.dummy
|| sym
->attr
.save
15222 || sym
->attr
.select_type_temporary
15223 || sym
->attr
.associate_var
15224 || (sym
->ns
->save_all
&& !sym
->attr
.automatic
)
15225 || sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
15226 || sym
->ns
->proc_name
->attr
.is_main_program
15227 || sym
->attr
.function
|| sym
->attr
.result
|| sym
->attr
.use_assoc
))
15229 gfc_error ("Variable %qs at %L is a coarray and is not ALLOCATABLE, SAVE "
15230 "nor a dummy argument", sym
->name
, &sym
->declared_at
);
15234 else if (class_attr
.codimension
&& !sym
->attr
.select_type_temporary
15235 && !class_attr
.allocatable
&& as
&& as
->cotype
== AS_DEFERRED
)
15237 gfc_error ("Coarray variable %qs at %L shall not have codimensions with "
15238 "deferred shape", sym
->name
, &sym
->declared_at
);
15241 else if (class_attr
.codimension
&& class_attr
.allocatable
&& as
15242 && (as
->cotype
!= AS_DEFERRED
|| as
->type
!= AS_DEFERRED
))
15244 gfc_error ("Allocatable coarray variable %qs at %L must have "
15245 "deferred shape", sym
->name
, &sym
->declared_at
);
15250 if ((((sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
->attr
.coarray_comp
)
15251 || (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
15252 && CLASS_DATA (sym
)->attr
.coarray_comp
))
15253 || (class_attr
.codimension
&& class_attr
.allocatable
))
15254 && sym
->attr
.dummy
&& sym
->attr
.intent
== INTENT_OUT
)
15256 gfc_error ("Variable %qs at %L is INTENT(OUT) and can thus not be an "
15257 "allocatable coarray or have coarray components",
15258 sym
->name
, &sym
->declared_at
);
15262 if (class_attr
.codimension
&& sym
->attr
.dummy
15263 && sym
->ns
->proc_name
&& sym
->ns
->proc_name
->attr
.is_bind_c
)
15265 gfc_error ("Coarray dummy variable %qs at %L not allowed in BIND(C) "
15266 "procedure %qs", sym
->name
, &sym
->declared_at
,
15267 sym
->ns
->proc_name
->name
);
15271 if (sym
->ts
.type
== BT_LOGICAL
15272 && ((sym
->attr
.function
&& sym
->attr
.is_bind_c
&& sym
->result
== sym
)
15273 || ((sym
->attr
.dummy
|| sym
->attr
.result
) && sym
->ns
->proc_name
15274 && sym
->ns
->proc_name
->attr
.is_bind_c
)))
15277 for (i
= 0; gfc_logical_kinds
[i
].kind
; i
++)
15278 if (gfc_logical_kinds
[i
].kind
== sym
->ts
.kind
)
15280 if (!gfc_logical_kinds
[i
].c_bool
&& sym
->attr
.dummy
15281 && !gfc_notify_std (GFC_STD_GNU
, "LOGICAL dummy argument %qs at "
15282 "%L with non-C_Bool kind in BIND(C) procedure "
15283 "%qs", sym
->name
, &sym
->declared_at
,
15284 sym
->ns
->proc_name
->name
))
15286 else if (!gfc_logical_kinds
[i
].c_bool
15287 && !gfc_notify_std (GFC_STD_GNU
, "LOGICAL result variable "
15288 "%qs at %L with non-C_Bool kind in "
15289 "BIND(C) procedure %qs", sym
->name
,
15291 sym
->attr
.function
? sym
->name
15292 : sym
->ns
->proc_name
->name
))
15296 switch (sym
->attr
.flavor
)
15299 if (!resolve_fl_variable (sym
, mp_flag
))
15304 if (sym
->formal
&& !sym
->formal_ns
)
15306 /* Check that none of the arguments are a namelist. */
15307 gfc_formal_arglist
*formal
= sym
->formal
;
15309 for (; formal
; formal
= formal
->next
)
15310 if (formal
->sym
&& formal
->sym
->attr
.flavor
== FL_NAMELIST
)
15312 gfc_error ("Namelist %qs cannot be an argument to "
15313 "subroutine or function at %L",
15314 formal
->sym
->name
, &sym
->declared_at
);
15319 if (!resolve_fl_procedure (sym
, mp_flag
))
15324 if (!resolve_fl_namelist (sym
))
15329 if (!resolve_fl_parameter (sym
))
15337 /* Resolve array specifier. Check as well some constraints
15338 on COMMON blocks. */
15340 check_constant
= sym
->attr
.in_common
&& !sym
->attr
.pointer
;
15342 /* Set the formal_arg_flag so that check_conflict will not throw
15343 an error for host associated variables in the specification
15344 expression for an array_valued function. */
15345 if (sym
->attr
.function
&& sym
->as
)
15346 formal_arg_flag
= true;
15348 saved_specification_expr
= specification_expr
;
15349 specification_expr
= true;
15350 gfc_resolve_array_spec (sym
->as
, check_constant
);
15351 specification_expr
= saved_specification_expr
;
15353 formal_arg_flag
= false;
15355 /* Resolve formal namespaces. */
15356 if (sym
->formal_ns
&& sym
->formal_ns
!= gfc_current_ns
15357 && !sym
->attr
.contained
&& !sym
->attr
.intrinsic
)
15358 gfc_resolve (sym
->formal_ns
);
15360 /* Make sure the formal namespace is present. */
15361 if (sym
->formal
&& !sym
->formal_ns
)
15363 gfc_formal_arglist
*formal
= sym
->formal
;
15364 while (formal
&& !formal
->sym
)
15365 formal
= formal
->next
;
15369 sym
->formal_ns
= formal
->sym
->ns
;
15370 if (sym
->ns
!= formal
->sym
->ns
)
15371 sym
->formal_ns
->refs
++;
15375 /* Check threadprivate restrictions. */
15376 if (sym
->attr
.threadprivate
&& !sym
->attr
.save
15377 && !(sym
->ns
->save_all
&& !sym
->attr
.automatic
)
15378 && (!sym
->attr
.in_common
15379 && sym
->module
== NULL
15380 && (sym
->ns
->proc_name
== NULL
15381 || sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
)))
15382 gfc_error ("Threadprivate at %L isn't SAVEd", &sym
->declared_at
);
15384 /* Check omp declare target restrictions. */
15385 if (sym
->attr
.omp_declare_target
15386 && sym
->attr
.flavor
== FL_VARIABLE
15388 && !(sym
->ns
->save_all
&& !sym
->attr
.automatic
)
15389 && (!sym
->attr
.in_common
15390 && sym
->module
== NULL
15391 && (sym
->ns
->proc_name
== NULL
15392 || sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
)))
15393 gfc_error ("!$OMP DECLARE TARGET variable %qs at %L isn't SAVEd",
15394 sym
->name
, &sym
->declared_at
);
15396 /* If we have come this far we can apply default-initializers, as
15397 described in 14.7.5, to those variables that have not already
15398 been assigned one. */
15399 if (sym
->ts
.type
== BT_DERIVED
15401 && !sym
->attr
.allocatable
15402 && !sym
->attr
.alloc_comp
)
15404 symbol_attribute
*a
= &sym
->attr
;
15406 if ((!a
->save
&& !a
->dummy
&& !a
->pointer
15407 && !a
->in_common
&& !a
->use_assoc
15409 && !((a
->function
|| a
->result
)
15411 || sym
->ts
.u
.derived
->attr
.alloc_comp
15412 || sym
->ts
.u
.derived
->attr
.pointer_comp
))
15413 && !(a
->function
&& sym
!= sym
->result
))
15414 || (a
->dummy
&& a
->intent
== INTENT_OUT
&& !a
->pointer
))
15415 apply_default_init (sym
);
15416 else if (a
->function
&& sym
->result
&& a
->access
!= ACCESS_PRIVATE
15417 && (sym
->ts
.u
.derived
->attr
.alloc_comp
15418 || sym
->ts
.u
.derived
->attr
.pointer_comp
))
15419 /* Mark the result symbol to be referenced, when it has allocatable
15421 sym
->result
->attr
.referenced
= 1;
15424 if (sym
->ts
.type
== BT_CLASS
&& sym
->ns
== gfc_current_ns
15425 && sym
->attr
.dummy
&& sym
->attr
.intent
== INTENT_OUT
15426 && !CLASS_DATA (sym
)->attr
.class_pointer
15427 && !CLASS_DATA (sym
)->attr
.allocatable
)
15428 apply_default_init (sym
);
15430 /* If this symbol has a type-spec, check it. */
15431 if (sym
->attr
.flavor
== FL_VARIABLE
|| sym
->attr
.flavor
== FL_PARAMETER
15432 || (sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.function
))
15433 if (!resolve_typespec_used (&sym
->ts
, &sym
->declared_at
, sym
->name
))
15436 if (sym
->param_list
)
15441 /************* Resolve DATA statements *************/
15445 gfc_data_value
*vnode
;
15451 /* Advance the values structure to point to the next value in the data list. */
15454 next_data_value (void)
15456 while (mpz_cmp_ui (values
.left
, 0) == 0)
15459 if (values
.vnode
->next
== NULL
)
15462 values
.vnode
= values
.vnode
->next
;
15463 mpz_set (values
.left
, values
.vnode
->repeat
);
15471 check_data_variable (gfc_data_variable
*var
, locus
*where
)
15477 ar_type mark
= AR_UNKNOWN
;
15479 mpz_t section_index
[GFC_MAX_DIMENSIONS
];
15485 if (!gfc_resolve_expr (var
->expr
))
15489 mpz_init_set_si (offset
, 0);
15492 if (e
->expr_type
== EXPR_FUNCTION
&& e
->value
.function
.isym
15493 && e
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
)
15494 e
= e
->value
.function
.actual
->expr
;
15496 if (e
->expr_type
!= EXPR_VARIABLE
)
15498 gfc_error ("Expecting definable entity near %L", where
);
15502 sym
= e
->symtree
->n
.sym
;
15504 if (sym
->ns
->is_block_data
&& !sym
->attr
.in_common
)
15506 gfc_error ("BLOCK DATA element %qs at %L must be in COMMON",
15507 sym
->name
, &sym
->declared_at
);
15511 if (e
->ref
== NULL
&& sym
->as
)
15513 gfc_error ("DATA array %qs at %L must be specified in a previous"
15514 " declaration", sym
->name
, where
);
15518 has_pointer
= sym
->attr
.pointer
;
15520 if (gfc_is_coindexed (e
))
15522 gfc_error ("DATA element %qs at %L cannot have a coindex", sym
->name
,
15527 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
15529 if (ref
->type
== REF_COMPONENT
&& ref
->u
.c
.component
->attr
.pointer
)
15533 && ref
->type
== REF_ARRAY
15534 && ref
->u
.ar
.type
!= AR_FULL
)
15536 gfc_error ("DATA element %qs at %L is a pointer and so must "
15537 "be a full array", sym
->name
, where
);
15542 if (e
->rank
== 0 || has_pointer
)
15544 mpz_init_set_ui (size
, 1);
15551 /* Find the array section reference. */
15552 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
15554 if (ref
->type
!= REF_ARRAY
)
15556 if (ref
->u
.ar
.type
== AR_ELEMENT
)
15562 /* Set marks according to the reference pattern. */
15563 switch (ref
->u
.ar
.type
)
15571 /* Get the start position of array section. */
15572 gfc_get_section_index (ar
, section_index
, &offset
);
15577 gcc_unreachable ();
15580 if (!gfc_array_size (e
, &size
))
15582 gfc_error ("Nonconstant array section at %L in DATA statement",
15584 mpz_clear (offset
);
15591 while (mpz_cmp_ui (size
, 0) > 0)
15593 if (!next_data_value ())
15595 gfc_error ("DATA statement at %L has more variables than values",
15601 t
= gfc_check_assign (var
->expr
, values
.vnode
->expr
, 0);
15605 /* If we have more than one element left in the repeat count,
15606 and we have more than one element left in the target variable,
15607 then create a range assignment. */
15608 /* FIXME: Only done for full arrays for now, since array sections
15610 if (mark
== AR_FULL
&& ref
&& ref
->next
== NULL
15611 && mpz_cmp_ui (values
.left
, 1) > 0 && mpz_cmp_ui (size
, 1) > 0)
15615 if (mpz_cmp (size
, values
.left
) >= 0)
15617 mpz_init_set (range
, values
.left
);
15618 mpz_sub (size
, size
, values
.left
);
15619 mpz_set_ui (values
.left
, 0);
15623 mpz_init_set (range
, size
);
15624 mpz_sub (values
.left
, values
.left
, size
);
15625 mpz_set_ui (size
, 0);
15628 t
= gfc_assign_data_value (var
->expr
, values
.vnode
->expr
,
15631 mpz_add (offset
, offset
, range
);
15638 /* Assign initial value to symbol. */
15641 mpz_sub_ui (values
.left
, values
.left
, 1);
15642 mpz_sub_ui (size
, size
, 1);
15644 t
= gfc_assign_data_value (var
->expr
, values
.vnode
->expr
,
15649 if (mark
== AR_FULL
)
15650 mpz_add_ui (offset
, offset
, 1);
15652 /* Modify the array section indexes and recalculate the offset
15653 for next element. */
15654 else if (mark
== AR_SECTION
)
15655 gfc_advance_section (section_index
, ar
, &offset
);
15659 if (mark
== AR_SECTION
)
15661 for (i
= 0; i
< ar
->dimen
; i
++)
15662 mpz_clear (section_index
[i
]);
15666 mpz_clear (offset
);
15672 static bool traverse_data_var (gfc_data_variable
*, locus
*);
15674 /* Iterate over a list of elements in a DATA statement. */
15677 traverse_data_list (gfc_data_variable
*var
, locus
*where
)
15680 iterator_stack frame
;
15681 gfc_expr
*e
, *start
, *end
, *step
;
15682 bool retval
= true;
15684 mpz_init (frame
.value
);
15687 start
= gfc_copy_expr (var
->iter
.start
);
15688 end
= gfc_copy_expr (var
->iter
.end
);
15689 step
= gfc_copy_expr (var
->iter
.step
);
15691 if (!gfc_simplify_expr (start
, 1)
15692 || start
->expr_type
!= EXPR_CONSTANT
)
15694 gfc_error ("start of implied-do loop at %L could not be "
15695 "simplified to a constant value", &start
->where
);
15699 if (!gfc_simplify_expr (end
, 1)
15700 || end
->expr_type
!= EXPR_CONSTANT
)
15702 gfc_error ("end of implied-do loop at %L could not be "
15703 "simplified to a constant value", &start
->where
);
15707 if (!gfc_simplify_expr (step
, 1)
15708 || step
->expr_type
!= EXPR_CONSTANT
)
15710 gfc_error ("step of implied-do loop at %L could not be "
15711 "simplified to a constant value", &start
->where
);
15716 mpz_set (trip
, end
->value
.integer
);
15717 mpz_sub (trip
, trip
, start
->value
.integer
);
15718 mpz_add (trip
, trip
, step
->value
.integer
);
15720 mpz_div (trip
, trip
, step
->value
.integer
);
15722 mpz_set (frame
.value
, start
->value
.integer
);
15724 frame
.prev
= iter_stack
;
15725 frame
.variable
= var
->iter
.var
->symtree
;
15726 iter_stack
= &frame
;
15728 while (mpz_cmp_ui (trip
, 0) > 0)
15730 if (!traverse_data_var (var
->list
, where
))
15736 e
= gfc_copy_expr (var
->expr
);
15737 if (!gfc_simplify_expr (e
, 1))
15744 mpz_add (frame
.value
, frame
.value
, step
->value
.integer
);
15746 mpz_sub_ui (trip
, trip
, 1);
15750 mpz_clear (frame
.value
);
15753 gfc_free_expr (start
);
15754 gfc_free_expr (end
);
15755 gfc_free_expr (step
);
15757 iter_stack
= frame
.prev
;
15762 /* Type resolve variables in the variable list of a DATA statement. */
15765 traverse_data_var (gfc_data_variable
*var
, locus
*where
)
15769 for (; var
; var
= var
->next
)
15771 if (var
->expr
== NULL
)
15772 t
= traverse_data_list (var
, where
);
15774 t
= check_data_variable (var
, where
);
15784 /* Resolve the expressions and iterators associated with a data statement.
15785 This is separate from the assignment checking because data lists should
15786 only be resolved once. */
15789 resolve_data_variables (gfc_data_variable
*d
)
15791 for (; d
; d
= d
->next
)
15793 if (d
->list
== NULL
)
15795 if (!gfc_resolve_expr (d
->expr
))
15800 if (!gfc_resolve_iterator (&d
->iter
, false, true))
15803 if (!resolve_data_variables (d
->list
))
15812 /* Resolve a single DATA statement. We implement this by storing a pointer to
15813 the value list into static variables, and then recursively traversing the
15814 variables list, expanding iterators and such. */
15817 resolve_data (gfc_data
*d
)
15820 if (!resolve_data_variables (d
->var
))
15823 values
.vnode
= d
->value
;
15824 if (d
->value
== NULL
)
15825 mpz_set_ui (values
.left
, 0);
15827 mpz_set (values
.left
, d
->value
->repeat
);
15829 if (!traverse_data_var (d
->var
, &d
->where
))
15832 /* At this point, we better not have any values left. */
15834 if (next_data_value ())
15835 gfc_error ("DATA statement at %L has more values than variables",
15840 /* 12.6 Constraint: In a pure subprogram any variable which is in common or
15841 accessed by host or use association, is a dummy argument to a pure function,
15842 is a dummy argument with INTENT (IN) to a pure subroutine, or an object that
15843 is storage associated with any such variable, shall not be used in the
15844 following contexts: (clients of this function). */
15846 /* Determines if a variable is not 'pure', i.e., not assignable within a pure
15847 procedure. Returns zero if assignment is OK, nonzero if there is a
15850 gfc_impure_variable (gfc_symbol
*sym
)
15855 if (sym
->attr
.use_assoc
|| sym
->attr
.in_common
)
15858 /* Check if the symbol's ns is inside the pure procedure. */
15859 for (ns
= gfc_current_ns
; ns
; ns
= ns
->parent
)
15863 if (ns
->proc_name
->attr
.flavor
== FL_PROCEDURE
&& !sym
->attr
.function
)
15867 proc
= sym
->ns
->proc_name
;
15868 if (sym
->attr
.dummy
15869 && ((proc
->attr
.subroutine
&& sym
->attr
.intent
== INTENT_IN
)
15870 || proc
->attr
.function
))
15873 /* TODO: Sort out what can be storage associated, if anything, and include
15874 it here. In principle equivalences should be scanned but it does not
15875 seem to be possible to storage associate an impure variable this way. */
15880 /* Test whether a symbol is pure or not. For a NULL pointer, checks if the
15881 current namespace is inside a pure procedure. */
15884 gfc_pure (gfc_symbol
*sym
)
15886 symbol_attribute attr
;
15891 /* Check if the current namespace or one of its parents
15892 belongs to a pure procedure. */
15893 for (ns
= gfc_current_ns
; ns
; ns
= ns
->parent
)
15895 sym
= ns
->proc_name
;
15899 if (attr
.flavor
== FL_PROCEDURE
&& attr
.pure
)
15907 return attr
.flavor
== FL_PROCEDURE
&& attr
.pure
;
15911 /* Test whether a symbol is implicitly pure or not. For a NULL pointer,
15912 checks if the current namespace is implicitly pure. Note that this
15913 function returns false for a PURE procedure. */
15916 gfc_implicit_pure (gfc_symbol
*sym
)
15922 /* Check if the current procedure is implicit_pure. Walk up
15923 the procedure list until we find a procedure. */
15924 for (ns
= gfc_current_ns
; ns
; ns
= ns
->parent
)
15926 sym
= ns
->proc_name
;
15930 if (sym
->attr
.flavor
== FL_PROCEDURE
)
15935 return sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.implicit_pure
15936 && !sym
->attr
.pure
;
15941 gfc_unset_implicit_pure (gfc_symbol
*sym
)
15947 /* Check if the current procedure is implicit_pure. Walk up
15948 the procedure list until we find a procedure. */
15949 for (ns
= gfc_current_ns
; ns
; ns
= ns
->parent
)
15951 sym
= ns
->proc_name
;
15955 if (sym
->attr
.flavor
== FL_PROCEDURE
)
15960 if (sym
->attr
.flavor
== FL_PROCEDURE
)
15961 sym
->attr
.implicit_pure
= 0;
15963 sym
->attr
.pure
= 0;
15967 /* Test whether the current procedure is elemental or not. */
15970 gfc_elemental (gfc_symbol
*sym
)
15972 symbol_attribute attr
;
15975 sym
= gfc_current_ns
->proc_name
;
15980 return attr
.flavor
== FL_PROCEDURE
&& attr
.elemental
;
15984 /* Warn about unused labels. */
15987 warn_unused_fortran_label (gfc_st_label
*label
)
15992 warn_unused_fortran_label (label
->left
);
15994 if (label
->defined
== ST_LABEL_UNKNOWN
)
15997 switch (label
->referenced
)
15999 case ST_LABEL_UNKNOWN
:
16000 gfc_warning (OPT_Wunused_label
, "Label %d at %L defined but not used",
16001 label
->value
, &label
->where
);
16004 case ST_LABEL_BAD_TARGET
:
16005 gfc_warning (OPT_Wunused_label
,
16006 "Label %d at %L defined but cannot be used",
16007 label
->value
, &label
->where
);
16014 warn_unused_fortran_label (label
->right
);
16018 /* Returns the sequence type of a symbol or sequence. */
16021 sequence_type (gfc_typespec ts
)
16030 if (ts
.u
.derived
->components
== NULL
)
16031 return SEQ_NONDEFAULT
;
16033 result
= sequence_type (ts
.u
.derived
->components
->ts
);
16034 for (c
= ts
.u
.derived
->components
->next
; c
; c
= c
->next
)
16035 if (sequence_type (c
->ts
) != result
)
16041 if (ts
.kind
!= gfc_default_character_kind
)
16042 return SEQ_NONDEFAULT
;
16044 return SEQ_CHARACTER
;
16047 if (ts
.kind
!= gfc_default_integer_kind
)
16048 return SEQ_NONDEFAULT
;
16050 return SEQ_NUMERIC
;
16053 if (!(ts
.kind
== gfc_default_real_kind
16054 || ts
.kind
== gfc_default_double_kind
))
16055 return SEQ_NONDEFAULT
;
16057 return SEQ_NUMERIC
;
16060 if (ts
.kind
!= gfc_default_complex_kind
)
16061 return SEQ_NONDEFAULT
;
16063 return SEQ_NUMERIC
;
16066 if (ts
.kind
!= gfc_default_logical_kind
)
16067 return SEQ_NONDEFAULT
;
16069 return SEQ_NUMERIC
;
16072 return SEQ_NONDEFAULT
;
16077 /* Resolve derived type EQUIVALENCE object. */
16080 resolve_equivalence_derived (gfc_symbol
*derived
, gfc_symbol
*sym
, gfc_expr
*e
)
16082 gfc_component
*c
= derived
->components
;
16087 /* Shall not be an object of nonsequence derived type. */
16088 if (!derived
->attr
.sequence
)
16090 gfc_error ("Derived type variable %qs at %L must have SEQUENCE "
16091 "attribute to be an EQUIVALENCE object", sym
->name
,
16096 /* Shall not have allocatable components. */
16097 if (derived
->attr
.alloc_comp
)
16099 gfc_error ("Derived type variable %qs at %L cannot have ALLOCATABLE "
16100 "components to be an EQUIVALENCE object",sym
->name
,
16105 if (sym
->attr
.in_common
&& gfc_has_default_initializer (sym
->ts
.u
.derived
))
16107 gfc_error ("Derived type variable %qs at %L with default "
16108 "initialization cannot be in EQUIVALENCE with a variable "
16109 "in COMMON", sym
->name
, &e
->where
);
16113 for (; c
; c
= c
->next
)
16115 if (gfc_bt_struct (c
->ts
.type
)
16116 && (!resolve_equivalence_derived(c
->ts
.u
.derived
, sym
, e
)))
16119 /* Shall not be an object of sequence derived type containing a pointer
16120 in the structure. */
16121 if (c
->attr
.pointer
)
16123 gfc_error ("Derived type variable %qs at %L with pointer "
16124 "component(s) cannot be an EQUIVALENCE object",
16125 sym
->name
, &e
->where
);
16133 /* Resolve equivalence object.
16134 An EQUIVALENCE object shall not be a dummy argument, a pointer, a target,
16135 an allocatable array, an object of nonsequence derived type, an object of
16136 sequence derived type containing a pointer at any level of component
16137 selection, an automatic object, a function name, an entry name, a result
16138 name, a named constant, a structure component, or a subobject of any of
16139 the preceding objects. A substring shall not have length zero. A
16140 derived type shall not have components with default initialization nor
16141 shall two objects of an equivalence group be initialized.
16142 Either all or none of the objects shall have an protected attribute.
16143 The simple constraints are done in symbol.c(check_conflict) and the rest
16144 are implemented here. */
16147 resolve_equivalence (gfc_equiv
*eq
)
16150 gfc_symbol
*first_sym
;
16153 locus
*last_where
= NULL
;
16154 seq_type eq_type
, last_eq_type
;
16155 gfc_typespec
*last_ts
;
16156 int object
, cnt_protected
;
16159 last_ts
= &eq
->expr
->symtree
->n
.sym
->ts
;
16161 first_sym
= eq
->expr
->symtree
->n
.sym
;
16165 for (object
= 1; eq
; eq
= eq
->eq
, object
++)
16169 e
->ts
= e
->symtree
->n
.sym
->ts
;
16170 /* match_varspec might not know yet if it is seeing
16171 array reference or substring reference, as it doesn't
16173 if (e
->ref
&& e
->ref
->type
== REF_ARRAY
)
16175 gfc_ref
*ref
= e
->ref
;
16176 sym
= e
->symtree
->n
.sym
;
16178 if (sym
->attr
.dimension
)
16180 ref
->u
.ar
.as
= sym
->as
;
16184 /* For substrings, convert REF_ARRAY into REF_SUBSTRING. */
16185 if (e
->ts
.type
== BT_CHARACTER
16187 && ref
->type
== REF_ARRAY
16188 && ref
->u
.ar
.dimen
== 1
16189 && ref
->u
.ar
.dimen_type
[0] == DIMEN_RANGE
16190 && ref
->u
.ar
.stride
[0] == NULL
)
16192 gfc_expr
*start
= ref
->u
.ar
.start
[0];
16193 gfc_expr
*end
= ref
->u
.ar
.end
[0];
16196 /* Optimize away the (:) reference. */
16197 if (start
== NULL
&& end
== NULL
)
16200 e
->ref
= ref
->next
;
16202 e
->ref
->next
= ref
->next
;
16207 ref
->type
= REF_SUBSTRING
;
16209 start
= gfc_get_int_expr (gfc_charlen_int_kind
,
16211 ref
->u
.ss
.start
= start
;
16212 if (end
== NULL
&& e
->ts
.u
.cl
)
16213 end
= gfc_copy_expr (e
->ts
.u
.cl
->length
);
16214 ref
->u
.ss
.end
= end
;
16215 ref
->u
.ss
.length
= e
->ts
.u
.cl
;
16222 /* Any further ref is an error. */
16225 gcc_assert (ref
->type
== REF_ARRAY
);
16226 gfc_error ("Syntax error in EQUIVALENCE statement at %L",
16232 if (!gfc_resolve_expr (e
))
16235 sym
= e
->symtree
->n
.sym
;
16237 if (sym
->attr
.is_protected
)
16239 if (cnt_protected
> 0 && cnt_protected
!= object
)
16241 gfc_error ("Either all or none of the objects in the "
16242 "EQUIVALENCE set at %L shall have the "
16243 "PROTECTED attribute",
16248 /* Shall not equivalence common block variables in a PURE procedure. */
16249 if (sym
->ns
->proc_name
16250 && sym
->ns
->proc_name
->attr
.pure
16251 && sym
->attr
.in_common
)
16253 /* Need to check for symbols that may have entered the pure
16254 procedure via a USE statement. */
16255 bool saw_sym
= false;
16256 if (sym
->ns
->use_stmts
)
16259 for (r
= sym
->ns
->use_stmts
->rename
; r
; r
= r
->next
)
16260 if (strcmp(r
->use_name
, sym
->name
) == 0) saw_sym
= true;
16266 gfc_error ("COMMON block member %qs at %L cannot be an "
16267 "EQUIVALENCE object in the pure procedure %qs",
16268 sym
->name
, &e
->where
, sym
->ns
->proc_name
->name
);
16272 /* Shall not be a named constant. */
16273 if (e
->expr_type
== EXPR_CONSTANT
)
16275 gfc_error ("Named constant %qs at %L cannot be an EQUIVALENCE "
16276 "object", sym
->name
, &e
->where
);
16280 if (e
->ts
.type
== BT_DERIVED
16281 && !resolve_equivalence_derived (e
->ts
.u
.derived
, sym
, e
))
16284 /* Check that the types correspond correctly:
16286 A numeric sequence structure may be equivalenced to another sequence
16287 structure, an object of default integer type, default real type, double
16288 precision real type, default logical type such that components of the
16289 structure ultimately only become associated to objects of the same
16290 kind. A character sequence structure may be equivalenced to an object
16291 of default character kind or another character sequence structure.
16292 Other objects may be equivalenced only to objects of the same type and
16293 kind parameters. */
16295 /* Identical types are unconditionally OK. */
16296 if (object
== 1 || gfc_compare_types (last_ts
, &sym
->ts
))
16297 goto identical_types
;
16299 last_eq_type
= sequence_type (*last_ts
);
16300 eq_type
= sequence_type (sym
->ts
);
16302 /* Since the pair of objects is not of the same type, mixed or
16303 non-default sequences can be rejected. */
16305 msg
= "Sequence %s with mixed components in EQUIVALENCE "
16306 "statement at %L with different type objects";
16308 && last_eq_type
== SEQ_MIXED
16309 && !gfc_notify_std (GFC_STD_GNU
, msg
, first_sym
->name
, last_where
))
16310 || (eq_type
== SEQ_MIXED
16311 && !gfc_notify_std (GFC_STD_GNU
, msg
, sym
->name
, &e
->where
)))
16314 msg
= "Non-default type object or sequence %s in EQUIVALENCE "
16315 "statement at %L with objects of different type";
16317 && last_eq_type
== SEQ_NONDEFAULT
16318 && !gfc_notify_std (GFC_STD_GNU
, msg
, first_sym
->name
, last_where
))
16319 || (eq_type
== SEQ_NONDEFAULT
16320 && !gfc_notify_std (GFC_STD_GNU
, msg
, sym
->name
, &e
->where
)))
16323 msg
="Non-CHARACTER object %qs in default CHARACTER "
16324 "EQUIVALENCE statement at %L";
16325 if (last_eq_type
== SEQ_CHARACTER
16326 && eq_type
!= SEQ_CHARACTER
16327 && !gfc_notify_std (GFC_STD_GNU
, msg
, sym
->name
, &e
->where
))
16330 msg
="Non-NUMERIC object %qs in default NUMERIC "
16331 "EQUIVALENCE statement at %L";
16332 if (last_eq_type
== SEQ_NUMERIC
16333 && eq_type
!= SEQ_NUMERIC
16334 && !gfc_notify_std (GFC_STD_GNU
, msg
, sym
->name
, &e
->where
))
16339 last_where
= &e
->where
;
16344 /* Shall not be an automatic array. */
16345 if (e
->ref
->type
== REF_ARRAY
16346 && !gfc_resolve_array_spec (e
->ref
->u
.ar
.as
, 1))
16348 gfc_error ("Array %qs at %L with non-constant bounds cannot be "
16349 "an EQUIVALENCE object", sym
->name
, &e
->where
);
16356 /* Shall not be a structure component. */
16357 if (r
->type
== REF_COMPONENT
)
16359 gfc_error ("Structure component %qs at %L cannot be an "
16360 "EQUIVALENCE object",
16361 r
->u
.c
.component
->name
, &e
->where
);
16365 /* A substring shall not have length zero. */
16366 if (r
->type
== REF_SUBSTRING
)
16368 if (compare_bound (r
->u
.ss
.start
, r
->u
.ss
.end
) == CMP_GT
)
16370 gfc_error ("Substring at %L has length zero",
16371 &r
->u
.ss
.start
->where
);
16381 /* Function called by resolve_fntype to flag other symbol used in the
16382 length type parameter specification of function resuls. */
16385 flag_fn_result_spec (gfc_expr
*expr
,
16387 int *f ATTRIBUTE_UNUSED
)
16392 if (expr
->expr_type
== EXPR_VARIABLE
)
16394 s
= expr
->symtree
->n
.sym
;
16395 for (ns
= s
->ns
; ns
; ns
= ns
->parent
)
16401 gfc_error ("Self reference in character length expression "
16402 "for %qs at %L", sym
->name
, &expr
->where
);
16406 if (!s
->fn_result_spec
16407 && s
->attr
.flavor
== FL_PARAMETER
)
16409 /* Function contained in a module.... */
16410 if (ns
->proc_name
&& ns
->proc_name
->attr
.flavor
== FL_MODULE
)
16413 s
->fn_result_spec
= 1;
16414 /* Make sure that this symbol is translated as a module
16416 st
= gfc_get_unique_symtree (ns
);
16420 /* ... which is use associated and called. */
16421 else if (s
->attr
.use_assoc
|| s
->attr
.used_in_submodule
16423 /* External function matched with an interface. */
16426 && s
->ns
->proc_name
->attr
.if_source
== IFSRC_DECL
)
16427 || s
->ns
->proc_name
->attr
.if_source
== IFSRC_IFBODY
)
16428 && s
->ns
->proc_name
->attr
.function
))
16429 s
->fn_result_spec
= 1;
16436 /* Resolve function and ENTRY types, issue diagnostics if needed. */
16439 resolve_fntype (gfc_namespace
*ns
)
16441 gfc_entry_list
*el
;
16444 if (ns
->proc_name
== NULL
|| !ns
->proc_name
->attr
.function
)
16447 /* If there are any entries, ns->proc_name is the entry master
16448 synthetic symbol and ns->entries->sym actual FUNCTION symbol. */
16450 sym
= ns
->entries
->sym
;
16452 sym
= ns
->proc_name
;
16453 if (sym
->result
== sym
16454 && sym
->ts
.type
== BT_UNKNOWN
16455 && !gfc_set_default_type (sym
, 0, NULL
)
16456 && !sym
->attr
.untyped
)
16458 gfc_error ("Function %qs at %L has no IMPLICIT type",
16459 sym
->name
, &sym
->declared_at
);
16460 sym
->attr
.untyped
= 1;
16463 if (sym
->ts
.type
== BT_DERIVED
&& !sym
->ts
.u
.derived
->attr
.use_assoc
16464 && !sym
->attr
.contained
16465 && !gfc_check_symbol_access (sym
->ts
.u
.derived
)
16466 && gfc_check_symbol_access (sym
))
16468 gfc_notify_std (GFC_STD_F2003
, "PUBLIC function %qs at "
16469 "%L of PRIVATE type %qs", sym
->name
,
16470 &sym
->declared_at
, sym
->ts
.u
.derived
->name
);
16474 for (el
= ns
->entries
->next
; el
; el
= el
->next
)
16476 if (el
->sym
->result
== el
->sym
16477 && el
->sym
->ts
.type
== BT_UNKNOWN
16478 && !gfc_set_default_type (el
->sym
, 0, NULL
)
16479 && !el
->sym
->attr
.untyped
)
16481 gfc_error ("ENTRY %qs at %L has no IMPLICIT type",
16482 el
->sym
->name
, &el
->sym
->declared_at
);
16483 el
->sym
->attr
.untyped
= 1;
16487 if (sym
->ts
.type
== BT_CHARACTER
)
16488 gfc_traverse_expr (sym
->ts
.u
.cl
->length
, sym
, flag_fn_result_spec
, 0);
16492 /* 12.3.2.1.1 Defined operators. */
16495 check_uop_procedure (gfc_symbol
*sym
, locus where
)
16497 gfc_formal_arglist
*formal
;
16499 if (!sym
->attr
.function
)
16501 gfc_error ("User operator procedure %qs at %L must be a FUNCTION",
16502 sym
->name
, &where
);
16506 if (sym
->ts
.type
== BT_CHARACTER
16507 && !((sym
->ts
.u
.cl
&& sym
->ts
.u
.cl
->length
) || sym
->ts
.deferred
)
16508 && !(sym
->result
&& ((sym
->result
->ts
.u
.cl
16509 && sym
->result
->ts
.u
.cl
->length
) || sym
->result
->ts
.deferred
)))
16511 gfc_error ("User operator procedure %qs at %L cannot be assumed "
16512 "character length", sym
->name
, &where
);
16516 formal
= gfc_sym_get_dummy_args (sym
);
16517 if (!formal
|| !formal
->sym
)
16519 gfc_error ("User operator procedure %qs at %L must have at least "
16520 "one argument", sym
->name
, &where
);
16524 if (formal
->sym
->attr
.intent
!= INTENT_IN
)
16526 gfc_error ("First argument of operator interface at %L must be "
16527 "INTENT(IN)", &where
);
16531 if (formal
->sym
->attr
.optional
)
16533 gfc_error ("First argument of operator interface at %L cannot be "
16534 "optional", &where
);
16538 formal
= formal
->next
;
16539 if (!formal
|| !formal
->sym
)
16542 if (formal
->sym
->attr
.intent
!= INTENT_IN
)
16544 gfc_error ("Second argument of operator interface at %L must be "
16545 "INTENT(IN)", &where
);
16549 if (formal
->sym
->attr
.optional
)
16551 gfc_error ("Second argument of operator interface at %L cannot be "
16552 "optional", &where
);
16558 gfc_error ("Operator interface at %L must have, at most, two "
16559 "arguments", &where
);
16567 gfc_resolve_uops (gfc_symtree
*symtree
)
16569 gfc_interface
*itr
;
16571 if (symtree
== NULL
)
16574 gfc_resolve_uops (symtree
->left
);
16575 gfc_resolve_uops (symtree
->right
);
16577 for (itr
= symtree
->n
.uop
->op
; itr
; itr
= itr
->next
)
16578 check_uop_procedure (itr
->sym
, itr
->sym
->declared_at
);
16582 /* Examine all of the expressions associated with a program unit,
16583 assign types to all intermediate expressions, make sure that all
16584 assignments are to compatible types and figure out which names
16585 refer to which functions or subroutines. It doesn't check code
16586 block, which is handled by gfc_resolve_code. */
16589 resolve_types (gfc_namespace
*ns
)
16595 gfc_namespace
* old_ns
= gfc_current_ns
;
16597 if (ns
->types_resolved
)
16600 /* Check that all IMPLICIT types are ok. */
16601 if (!ns
->seen_implicit_none
)
16604 for (letter
= 0; letter
!= GFC_LETTERS
; ++letter
)
16605 if (ns
->set_flag
[letter
]
16606 && !resolve_typespec_used (&ns
->default_type
[letter
],
16607 &ns
->implicit_loc
[letter
], NULL
))
16611 gfc_current_ns
= ns
;
16613 resolve_entries (ns
);
16615 resolve_common_vars (&ns
->blank_common
, false);
16616 resolve_common_blocks (ns
->common_root
);
16618 resolve_contained_functions (ns
);
16620 if (ns
->proc_name
&& ns
->proc_name
->attr
.flavor
== FL_PROCEDURE
16621 && ns
->proc_name
->attr
.if_source
== IFSRC_IFBODY
)
16622 resolve_formal_arglist (ns
->proc_name
);
16624 gfc_traverse_ns (ns
, resolve_bind_c_derived_types
);
16626 for (cl
= ns
->cl_list
; cl
; cl
= cl
->next
)
16627 resolve_charlen (cl
);
16629 gfc_traverse_ns (ns
, resolve_symbol
);
16631 resolve_fntype (ns
);
16633 for (n
= ns
->contained
; n
; n
= n
->sibling
)
16635 if (gfc_pure (ns
->proc_name
) && !gfc_pure (n
->proc_name
))
16636 gfc_error ("Contained procedure %qs at %L of a PURE procedure must "
16637 "also be PURE", n
->proc_name
->name
,
16638 &n
->proc_name
->declared_at
);
16644 gfc_do_concurrent_flag
= 0;
16645 gfc_check_interfaces (ns
);
16647 gfc_traverse_ns (ns
, resolve_values
);
16653 for (d
= ns
->data
; d
; d
= d
->next
)
16657 gfc_traverse_ns (ns
, gfc_formalize_init_value
);
16659 gfc_traverse_ns (ns
, gfc_verify_binding_labels
);
16661 for (eq
= ns
->equiv
; eq
; eq
= eq
->next
)
16662 resolve_equivalence (eq
);
16664 /* Warn about unused labels. */
16665 if (warn_unused_label
)
16666 warn_unused_fortran_label (ns
->st_labels
);
16668 gfc_resolve_uops (ns
->uop_root
);
16670 gfc_traverse_ns (ns
, gfc_verify_DTIO_procedures
);
16672 gfc_resolve_omp_declare_simd (ns
);
16674 gfc_resolve_omp_udrs (ns
->omp_udr_root
);
16676 ns
->types_resolved
= 1;
16678 gfc_current_ns
= old_ns
;
16682 /* Call gfc_resolve_code recursively. */
16685 resolve_codes (gfc_namespace
*ns
)
16688 bitmap_obstack old_obstack
;
16690 if (ns
->resolved
== 1)
16693 for (n
= ns
->contained
; n
; n
= n
->sibling
)
16696 gfc_current_ns
= ns
;
16698 /* Don't clear 'cs_base' if this is the namespace of a BLOCK construct. */
16699 if (!(ns
->proc_name
&& ns
->proc_name
->attr
.flavor
== FL_LABEL
))
16702 /* Set to an out of range value. */
16703 current_entry_id
= -1;
16705 old_obstack
= labels_obstack
;
16706 bitmap_obstack_initialize (&labels_obstack
);
16708 gfc_resolve_oacc_declare (ns
);
16709 gfc_resolve_omp_local_vars (ns
);
16710 gfc_resolve_code (ns
->code
, ns
);
16712 bitmap_obstack_release (&labels_obstack
);
16713 labels_obstack
= old_obstack
;
16717 /* This function is called after a complete program unit has been compiled.
16718 Its purpose is to examine all of the expressions associated with a program
16719 unit, assign types to all intermediate expressions, make sure that all
16720 assignments are to compatible types and figure out which names refer to
16721 which functions or subroutines. */
16724 gfc_resolve (gfc_namespace
*ns
)
16726 gfc_namespace
*old_ns
;
16727 code_stack
*old_cs_base
;
16728 struct gfc_omp_saved_state old_omp_state
;
16734 old_ns
= gfc_current_ns
;
16735 old_cs_base
= cs_base
;
16737 /* As gfc_resolve can be called during resolution of an OpenMP construct
16738 body, we should clear any state associated to it, so that say NS's
16739 DO loops are not interpreted as OpenMP loops. */
16740 if (!ns
->construct_entities
)
16741 gfc_omp_save_and_clear_state (&old_omp_state
);
16743 resolve_types (ns
);
16744 component_assignment_level
= 0;
16745 resolve_codes (ns
);
16747 gfc_current_ns
= old_ns
;
16748 cs_base
= old_cs_base
;
16751 gfc_run_passes (ns
);
16753 if (!ns
->construct_entities
)
16754 gfc_omp_restore_state (&old_omp_state
);