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
)
944 gfc_add_in_common (&csym
->attr
, csym
->name
, &common_block
->where
);
945 gfc_notify_std (GFC_STD_F2018_OBS
, "COMMON block at %L",
946 &common_block
->where
);
949 if (csym
->value
|| csym
->attr
.data
)
951 if (!csym
->ns
->is_block_data
)
952 gfc_notify_std (GFC_STD_GNU
, "Variable %qs at %L is in COMMON "
953 "but only in BLOCK DATA initialization is "
954 "allowed", csym
->name
, &csym
->declared_at
);
955 else if (!named_common
)
956 gfc_notify_std (GFC_STD_GNU
, "Initialized variable %qs at %L is "
957 "in a blank COMMON but initialization is only "
958 "allowed in named common blocks", csym
->name
,
962 if (UNLIMITED_POLY (csym
))
963 gfc_error_now ("%qs in cannot appear in COMMON at %L "
964 "[F2008:C5100]", csym
->name
, &csym
->declared_at
);
966 if (csym
->ts
.type
!= BT_DERIVED
)
969 if (!(csym
->ts
.u
.derived
->attr
.sequence
970 || csym
->ts
.u
.derived
->attr
.is_bind_c
))
971 gfc_error_now ("Derived type variable %qs in COMMON at %L "
972 "has neither the SEQUENCE nor the BIND(C) "
973 "attribute", csym
->name
, &csym
->declared_at
);
974 if (csym
->ts
.u
.derived
->attr
.alloc_comp
)
975 gfc_error_now ("Derived type variable %qs in COMMON at %L "
976 "has an ultimate component that is "
977 "allocatable", csym
->name
, &csym
->declared_at
);
978 if (gfc_has_default_initializer (csym
->ts
.u
.derived
))
979 gfc_error_now ("Derived type variable %qs in COMMON at %L "
980 "may not have default initializer", csym
->name
,
983 if (csym
->attr
.flavor
== FL_UNKNOWN
&& !csym
->attr
.proc_pointer
)
984 gfc_add_flavor (&csym
->attr
, FL_VARIABLE
, csym
->name
, &csym
->declared_at
);
988 /* Resolve common blocks. */
990 resolve_common_blocks (gfc_symtree
*common_root
)
995 if (common_root
== NULL
)
998 if (common_root
->left
)
999 resolve_common_blocks (common_root
->left
);
1000 if (common_root
->right
)
1001 resolve_common_blocks (common_root
->right
);
1003 resolve_common_vars (common_root
->n
.common
, true);
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. */
4146 switch (e
->value
.op
.op
)
4148 case INTRINSIC_PLUS
:
4149 case INTRINSIC_MINUS
:
4150 case INTRINSIC_TIMES
:
4151 case INTRINSIC_DIVIDE
:
4152 case INTRINSIC_POWER
:
4153 case INTRINSIC_CONCAT
:
4157 case INTRINSIC_NEQV
:
4159 case INTRINSIC_EQ_OS
:
4161 case INTRINSIC_NE_OS
:
4163 case INTRINSIC_GT_OS
:
4165 case INTRINSIC_GE_OS
:
4167 case INTRINSIC_LT_OS
:
4169 case INTRINSIC_LE_OS
:
4171 if (op1
->rank
== 0 && op2
->rank
== 0)
4174 if (op1
->rank
== 0 && op2
->rank
!= 0)
4176 e
->rank
= op2
->rank
;
4178 if (e
->shape
== NULL
)
4179 e
->shape
= gfc_copy_shape (op2
->shape
, op2
->rank
);
4182 if (op1
->rank
!= 0 && op2
->rank
== 0)
4184 e
->rank
= op1
->rank
;
4186 if (e
->shape
== NULL
)
4187 e
->shape
= gfc_copy_shape (op1
->shape
, op1
->rank
);
4190 if (op1
->rank
!= 0 && op2
->rank
!= 0)
4192 if (op1
->rank
== op2
->rank
)
4194 e
->rank
= op1
->rank
;
4195 if (e
->shape
== NULL
)
4197 t
= compare_shapes (op1
, op2
);
4201 e
->shape
= gfc_copy_shape (op1
->shape
, op1
->rank
);
4206 /* Allow higher level expressions to work. */
4209 /* Try user-defined operators, and otherwise throw an error. */
4210 dual_locus_error
= true;
4212 _("Inconsistent ranks for operator at %%L and %%L"));
4219 case INTRINSIC_PARENTHESES
:
4221 case INTRINSIC_UPLUS
:
4222 case INTRINSIC_UMINUS
:
4223 /* Simply copy arrayness attribute */
4224 e
->rank
= op1
->rank
;
4226 if (e
->shape
== NULL
)
4227 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
, bool *equal_length
)
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
);
4947 /* If the substring has the same length as the original
4948 variable, the reference itself can be deleted. */
4950 if (ref
->u
.ss
.length
!= NULL
4951 && compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.length
->length
) == CMP_EQ
4952 && compare_bound_int (ref
->u
.ss
.start
, 1) == CMP_EQ
)
4953 *equal_length
= true;
4960 /* This function supplies missing substring charlens. */
4963 gfc_resolve_substring_charlen (gfc_expr
*e
)
4966 gfc_expr
*start
, *end
;
4967 gfc_typespec
*ts
= NULL
;
4970 for (char_ref
= e
->ref
; char_ref
; char_ref
= char_ref
->next
)
4972 if (char_ref
->type
== REF_SUBSTRING
|| char_ref
->type
== REF_INQUIRY
)
4974 if (char_ref
->type
== REF_COMPONENT
)
4975 ts
= &char_ref
->u
.c
.component
->ts
;
4978 if (!char_ref
|| char_ref
->type
== REF_INQUIRY
)
4981 gcc_assert (char_ref
->next
== NULL
);
4985 if (e
->ts
.u
.cl
->length
)
4986 gfc_free_expr (e
->ts
.u
.cl
->length
);
4987 else if (e
->expr_type
== EXPR_VARIABLE
&& e
->symtree
->n
.sym
->attr
.dummy
)
4991 e
->ts
.type
= BT_CHARACTER
;
4992 e
->ts
.kind
= gfc_default_character_kind
;
4995 e
->ts
.u
.cl
= gfc_new_charlen (gfc_current_ns
, NULL
);
4997 if (char_ref
->u
.ss
.start
)
4998 start
= gfc_copy_expr (char_ref
->u
.ss
.start
);
5000 start
= gfc_get_int_expr (gfc_charlen_int_kind
, NULL
, 1);
5002 if (char_ref
->u
.ss
.end
)
5003 end
= gfc_copy_expr (char_ref
->u
.ss
.end
);
5004 else if (e
->expr_type
== EXPR_VARIABLE
)
5007 ts
= &e
->symtree
->n
.sym
->ts
;
5008 end
= gfc_copy_expr (ts
->u
.cl
->length
);
5015 gfc_free_expr (start
);
5016 gfc_free_expr (end
);
5020 /* Length = (end - start + 1).
5021 Check first whether it has a constant length. */
5022 if (gfc_dep_difference (end
, start
, &diff
))
5024 gfc_expr
*len
= gfc_get_constant_expr (BT_INTEGER
, gfc_charlen_int_kind
,
5027 mpz_add_ui (len
->value
.integer
, diff
, 1);
5029 e
->ts
.u
.cl
->length
= len
;
5030 /* The check for length < 0 is handled below */
5034 e
->ts
.u
.cl
->length
= gfc_subtract (end
, start
);
5035 e
->ts
.u
.cl
->length
= gfc_add (e
->ts
.u
.cl
->length
,
5036 gfc_get_int_expr (gfc_charlen_int_kind
,
5040 /* F2008, 6.4.1: Both the starting point and the ending point shall
5041 be within the range 1, 2, ..., n unless the starting point exceeds
5042 the ending point, in which case the substring has length zero. */
5044 if (mpz_cmp_si (e
->ts
.u
.cl
->length
->value
.integer
, 0) < 0)
5045 mpz_set_si (e
->ts
.u
.cl
->length
->value
.integer
, 0);
5047 e
->ts
.u
.cl
->length
->ts
.type
= BT_INTEGER
;
5048 e
->ts
.u
.cl
->length
->ts
.kind
= gfc_charlen_int_kind
;
5050 /* Make sure that the length is simplified. */
5051 gfc_simplify_expr (e
->ts
.u
.cl
->length
, 1);
5052 gfc_resolve_expr (e
->ts
.u
.cl
->length
);
5056 /* Resolve subtype references. */
5059 resolve_ref (gfc_expr
*expr
)
5061 int current_part_dimension
, n_components
, seen_part_dimension
;
5062 gfc_ref
*ref
, **prev
;
5065 for (ref
= expr
->ref
; ref
; ref
= ref
->next
)
5066 if (ref
->type
== REF_ARRAY
&& ref
->u
.ar
.as
== NULL
)
5068 find_array_spec (expr
);
5072 for (prev
= &expr
->ref
; *prev
!= NULL
;
5073 prev
= *prev
== NULL
? prev
: &(*prev
)->next
)
5074 switch ((*prev
)->type
)
5077 if (!resolve_array_ref (&(*prev
)->u
.ar
))
5086 equal_length
= false;
5087 if (!resolve_substring (*prev
, &equal_length
))
5090 if (expr
->expr_type
!= EXPR_SUBSTRING
&& equal_length
)
5092 /* Remove the reference and move the charlen, if any. */
5096 expr
->ts
.u
.cl
= ref
->u
.ss
.length
;
5097 ref
->u
.ss
.length
= NULL
;
5098 gfc_free_ref_list (ref
);
5103 /* Check constraints on part references. */
5105 current_part_dimension
= 0;
5106 seen_part_dimension
= 0;
5109 for (ref
= expr
->ref
; ref
; ref
= ref
->next
)
5114 switch (ref
->u
.ar
.type
)
5117 /* Coarray scalar. */
5118 if (ref
->u
.ar
.as
->rank
== 0)
5120 current_part_dimension
= 0;
5125 current_part_dimension
= 1;
5129 current_part_dimension
= 0;
5133 gfc_internal_error ("resolve_ref(): Bad array reference");
5139 if (current_part_dimension
|| seen_part_dimension
)
5142 if (ref
->u
.c
.component
->attr
.pointer
5143 || ref
->u
.c
.component
->attr
.proc_pointer
5144 || (ref
->u
.c
.component
->ts
.type
== BT_CLASS
5145 && CLASS_DATA (ref
->u
.c
.component
)->attr
.pointer
))
5147 gfc_error ("Component to the right of a part reference "
5148 "with nonzero rank must not have the POINTER "
5149 "attribute at %L", &expr
->where
);
5152 else if (ref
->u
.c
.component
->attr
.allocatable
5153 || (ref
->u
.c
.component
->ts
.type
== BT_CLASS
5154 && CLASS_DATA (ref
->u
.c
.component
)->attr
.allocatable
))
5157 gfc_error ("Component to the right of a part reference "
5158 "with nonzero rank must not have the ALLOCATABLE "
5159 "attribute at %L", &expr
->where
);
5172 if (((ref
->type
== REF_COMPONENT
&& n_components
> 1)
5173 || ref
->next
== NULL
)
5174 && current_part_dimension
5175 && seen_part_dimension
)
5177 gfc_error ("Two or more part references with nonzero rank must "
5178 "not be specified at %L", &expr
->where
);
5182 if (ref
->type
== REF_COMPONENT
)
5184 if (current_part_dimension
)
5185 seen_part_dimension
= 1;
5187 /* reset to make sure */
5188 current_part_dimension
= 0;
5196 /* Given an expression, determine its shape. This is easier than it sounds.
5197 Leaves the shape array NULL if it is not possible to determine the shape. */
5200 expression_shape (gfc_expr
*e
)
5202 mpz_t array
[GFC_MAX_DIMENSIONS
];
5205 if (e
->rank
<= 0 || e
->shape
!= NULL
)
5208 for (i
= 0; i
< e
->rank
; i
++)
5209 if (!gfc_array_dimen_size (e
, i
, &array
[i
]))
5212 e
->shape
= gfc_get_shape (e
->rank
);
5214 memcpy (e
->shape
, array
, e
->rank
* sizeof (mpz_t
));
5219 for (i
--; i
>= 0; i
--)
5220 mpz_clear (array
[i
]);
5224 /* Given a variable expression node, compute the rank of the expression by
5225 examining the base symbol and any reference structures it may have. */
5228 expression_rank (gfc_expr
*e
)
5233 /* Just to make sure, because EXPR_COMPCALL's also have an e->ref and that
5234 could lead to serious confusion... */
5235 gcc_assert (e
->expr_type
!= EXPR_COMPCALL
);
5239 if (e
->expr_type
== EXPR_ARRAY
)
5241 /* Constructors can have a rank different from one via RESHAPE(). */
5243 if (e
->symtree
== NULL
)
5249 e
->rank
= (e
->symtree
->n
.sym
->as
== NULL
)
5250 ? 0 : e
->symtree
->n
.sym
->as
->rank
;
5256 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
5258 if (ref
->type
== REF_COMPONENT
&& ref
->u
.c
.component
->attr
.proc_pointer
5259 && ref
->u
.c
.component
->attr
.function
&& !ref
->next
)
5260 rank
= ref
->u
.c
.component
->as
? ref
->u
.c
.component
->as
->rank
: 0;
5262 if (ref
->type
!= REF_ARRAY
)
5265 if (ref
->u
.ar
.type
== AR_FULL
)
5267 rank
= ref
->u
.ar
.as
->rank
;
5271 if (ref
->u
.ar
.type
== AR_SECTION
)
5273 /* Figure out the rank of the section. */
5275 gfc_internal_error ("expression_rank(): Two array specs");
5277 for (i
= 0; i
< ref
->u
.ar
.dimen
; i
++)
5278 if (ref
->u
.ar
.dimen_type
[i
] == DIMEN_RANGE
5279 || ref
->u
.ar
.dimen_type
[i
] == DIMEN_VECTOR
)
5289 expression_shape (e
);
5294 add_caf_get_intrinsic (gfc_expr
*e
)
5296 gfc_expr
*wrapper
, *tmp_expr
;
5300 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
5301 if (ref
->type
== REF_ARRAY
&& ref
->u
.ar
.codimen
> 0)
5306 for (n
= ref
->u
.ar
.dimen
; n
< ref
->u
.ar
.dimen
+ ref
->u
.ar
.codimen
; n
++)
5307 if (ref
->u
.ar
.dimen_type
[n
] != DIMEN_ELEMENT
)
5310 tmp_expr
= XCNEW (gfc_expr
);
5312 wrapper
= gfc_build_intrinsic_call (gfc_current_ns
, GFC_ISYM_CAF_GET
,
5313 "caf_get", tmp_expr
->where
, 1, tmp_expr
);
5314 wrapper
->ts
= e
->ts
;
5315 wrapper
->rank
= e
->rank
;
5317 wrapper
->shape
= gfc_copy_shape (e
->shape
, e
->rank
);
5324 remove_caf_get_intrinsic (gfc_expr
*e
)
5326 gcc_assert (e
->expr_type
== EXPR_FUNCTION
&& e
->value
.function
.isym
5327 && e
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
);
5328 gfc_expr
*e2
= e
->value
.function
.actual
->expr
;
5329 e
->value
.function
.actual
->expr
= NULL
;
5330 gfc_free_actual_arglist (e
->value
.function
.actual
);
5331 gfc_free_shape (&e
->shape
, e
->rank
);
5337 /* Resolve a variable expression. */
5340 resolve_variable (gfc_expr
*e
)
5347 if (e
->symtree
== NULL
)
5349 sym
= e
->symtree
->n
.sym
;
5351 /* Use same check as for TYPE(*) below; this check has to be before TYPE(*)
5352 as ts.type is set to BT_ASSUMED in resolve_symbol. */
5353 if (sym
->attr
.ext_attr
& (1 << EXT_ATTR_NO_ARG_CHECK
))
5355 if (!actual_arg
|| inquiry_argument
)
5357 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute may only "
5358 "be used as actual argument", sym
->name
, &e
->where
);
5362 /* TS 29113, 407b. */
5363 else if (e
->ts
.type
== BT_ASSUMED
)
5367 gfc_error ("Assumed-type variable %s at %L may only be used "
5368 "as actual argument", sym
->name
, &e
->where
);
5371 else if (inquiry_argument
&& !first_actual_arg
)
5373 /* FIXME: It doesn't work reliably as inquiry_argument is not set
5374 for all inquiry functions in resolve_function; the reason is
5375 that the function-name resolution happens too late in that
5377 gfc_error ("Assumed-type variable %s at %L as actual argument to "
5378 "an inquiry function shall be the first argument",
5379 sym
->name
, &e
->where
);
5383 /* TS 29113, C535b. */
5384 else if ((sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
5385 && CLASS_DATA (sym
)->as
5386 && CLASS_DATA (sym
)->as
->type
== AS_ASSUMED_RANK
)
5387 || (sym
->ts
.type
!= BT_CLASS
&& sym
->as
5388 && sym
->as
->type
== AS_ASSUMED_RANK
))
5392 gfc_error ("Assumed-rank variable %s at %L may only be used as "
5393 "actual argument", sym
->name
, &e
->where
);
5396 else if (inquiry_argument
&& !first_actual_arg
)
5398 /* FIXME: It doesn't work reliably as inquiry_argument is not set
5399 for all inquiry functions in resolve_function; the reason is
5400 that the function-name resolution happens too late in that
5402 gfc_error ("Assumed-rank variable %s at %L as actual argument "
5403 "to an inquiry function shall be the first argument",
5404 sym
->name
, &e
->where
);
5409 if ((sym
->attr
.ext_attr
& (1 << EXT_ATTR_NO_ARG_CHECK
)) && e
->ref
5410 && !(e
->ref
->type
== REF_ARRAY
&& e
->ref
->u
.ar
.type
== AR_FULL
5411 && e
->ref
->next
== NULL
))
5413 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute shall not have "
5414 "a subobject reference", sym
->name
, &e
->ref
->u
.ar
.where
);
5417 /* TS 29113, 407b. */
5418 else if (e
->ts
.type
== BT_ASSUMED
&& e
->ref
5419 && !(e
->ref
->type
== REF_ARRAY
&& e
->ref
->u
.ar
.type
== AR_FULL
5420 && e
->ref
->next
== NULL
))
5422 gfc_error ("Assumed-type variable %s at %L shall not have a subobject "
5423 "reference", sym
->name
, &e
->ref
->u
.ar
.where
);
5427 /* TS 29113, C535b. */
5428 if (((sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
5429 && CLASS_DATA (sym
)->as
5430 && CLASS_DATA (sym
)->as
->type
== AS_ASSUMED_RANK
)
5431 || (sym
->ts
.type
!= BT_CLASS
&& sym
->as
5432 && sym
->as
->type
== AS_ASSUMED_RANK
))
5434 && !(e
->ref
->type
== REF_ARRAY
&& e
->ref
->u
.ar
.type
== AR_FULL
5435 && e
->ref
->next
== NULL
))
5437 gfc_error ("Assumed-rank variable %s at %L shall not have a subobject "
5438 "reference", sym
->name
, &e
->ref
->u
.ar
.where
);
5442 /* For variables that are used in an associate (target => object) where
5443 the object's basetype is array valued while the target is scalar,
5444 the ts' type of the component refs is still array valued, which
5445 can't be translated that way. */
5446 if (sym
->assoc
&& e
->rank
== 0 && e
->ref
&& sym
->ts
.type
== BT_CLASS
5447 && sym
->assoc
->target
&& sym
->assoc
->target
->ts
.type
== BT_CLASS
5448 && CLASS_DATA (sym
->assoc
->target
)->as
)
5450 gfc_ref
*ref
= e
->ref
;
5456 ref
->u
.c
.sym
= sym
->ts
.u
.derived
;
5457 /* Stop the loop. */
5467 /* If this is an associate-name, it may be parsed with an array reference
5468 in error even though the target is scalar. Fail directly in this case.
5469 TODO Understand why class scalar expressions must be excluded. */
5470 if (sym
->assoc
&& !(sym
->ts
.type
== BT_CLASS
&& e
->rank
== 0))
5472 if (sym
->ts
.type
== BT_CLASS
)
5473 gfc_fix_class_refs (e
);
5474 if (!sym
->attr
.dimension
&& e
->ref
&& e
->ref
->type
== REF_ARRAY
)
5476 else if (sym
->attr
.dimension
&& (!e
->ref
|| e
->ref
->type
!= REF_ARRAY
))
5478 /* This can happen because the parser did not detect that the
5479 associate name is an array and the expression had no array
5481 gfc_ref
*ref
= gfc_get_ref ();
5482 ref
->type
= REF_ARRAY
;
5483 ref
->u
.ar
= *gfc_get_array_ref();
5484 ref
->u
.ar
.type
= AR_FULL
;
5487 ref
->u
.ar
.as
= sym
->as
;
5488 ref
->u
.ar
.dimen
= sym
->as
->rank
;
5496 if (sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
->attr
.generic
)
5497 sym
->ts
.u
.derived
= gfc_find_dt_in_generic (sym
->ts
.u
.derived
);
5499 /* On the other hand, the parser may not have known this is an array;
5500 in this case, we have to add a FULL reference. */
5501 if (sym
->assoc
&& sym
->attr
.dimension
&& !e
->ref
)
5503 e
->ref
= gfc_get_ref ();
5504 e
->ref
->type
= REF_ARRAY
;
5505 e
->ref
->u
.ar
.type
= AR_FULL
;
5506 e
->ref
->u
.ar
.dimen
= 0;
5509 /* Like above, but for class types, where the checking whether an array
5510 ref is present is more complicated. Furthermore make sure not to add
5511 the full array ref to _vptr or _len refs. */
5512 if (sym
->assoc
&& sym
->ts
.type
== BT_CLASS
5513 && CLASS_DATA (sym
)->attr
.dimension
5514 && (e
->ts
.type
!= BT_DERIVED
|| !e
->ts
.u
.derived
->attr
.vtype
))
5516 gfc_ref
*ref
, *newref
;
5518 newref
= gfc_get_ref ();
5519 newref
->type
= REF_ARRAY
;
5520 newref
->u
.ar
.type
= AR_FULL
;
5521 newref
->u
.ar
.dimen
= 0;
5522 /* Because this is an associate var and the first ref either is a ref to
5523 the _data component or not, no traversal of the ref chain is
5524 needed. The array ref needs to be inserted after the _data ref,
5525 or when that is not present, which may happend for polymorphic
5526 types, then at the first position. */
5530 else if (ref
->type
== REF_COMPONENT
5531 && strcmp ("_data", ref
->u
.c
.component
->name
) == 0)
5533 if (!ref
->next
|| ref
->next
->type
!= REF_ARRAY
)
5535 newref
->next
= ref
->next
;
5539 /* Array ref present already. */
5540 gfc_free_ref_list (newref
);
5542 else if (ref
->type
== REF_ARRAY
)
5543 /* Array ref present already. */
5544 gfc_free_ref_list (newref
);
5552 if (e
->ref
&& !resolve_ref (e
))
5555 if (sym
->attr
.flavor
== FL_PROCEDURE
5556 && (!sym
->attr
.function
5557 || (sym
->attr
.function
&& sym
->result
5558 && sym
->result
->attr
.proc_pointer
5559 && !sym
->result
->attr
.function
)))
5561 e
->ts
.type
= BT_PROCEDURE
;
5562 goto resolve_procedure
;
5565 if (sym
->ts
.type
!= BT_UNKNOWN
)
5566 gfc_variable_attr (e
, &e
->ts
);
5567 else if (sym
->attr
.flavor
== FL_PROCEDURE
5568 && sym
->attr
.function
&& sym
->result
5569 && sym
->result
->ts
.type
!= BT_UNKNOWN
5570 && sym
->result
->attr
.proc_pointer
)
5571 e
->ts
= sym
->result
->ts
;
5574 /* Must be a simple variable reference. */
5575 if (!gfc_set_default_type (sym
, 1, sym
->ns
))
5580 if (check_assumed_size_reference (sym
, e
))
5583 /* Deal with forward references to entries during gfc_resolve_code, to
5584 satisfy, at least partially, 12.5.2.5. */
5585 if (gfc_current_ns
->entries
5586 && current_entry_id
== sym
->entry_id
5589 && cs_base
->current
->op
!= EXEC_ENTRY
)
5591 gfc_entry_list
*entry
;
5592 gfc_formal_arglist
*formal
;
5594 bool seen
, saved_specification_expr
;
5596 /* If the symbol is a dummy... */
5597 if (sym
->attr
.dummy
&& sym
->ns
== gfc_current_ns
)
5599 entry
= gfc_current_ns
->entries
;
5602 /* ...test if the symbol is a parameter of previous entries. */
5603 for (; entry
&& entry
->id
<= current_entry_id
; entry
= entry
->next
)
5604 for (formal
= entry
->sym
->formal
; formal
; formal
= formal
->next
)
5606 if (formal
->sym
&& sym
->name
== formal
->sym
->name
)
5613 /* If it has not been seen as a dummy, this is an error. */
5616 if (specification_expr
)
5617 gfc_error ("Variable %qs, used in a specification expression"
5618 ", is referenced at %L before the ENTRY statement "
5619 "in which it is a parameter",
5620 sym
->name
, &cs_base
->current
->loc
);
5622 gfc_error ("Variable %qs is used at %L before the ENTRY "
5623 "statement in which it is a parameter",
5624 sym
->name
, &cs_base
->current
->loc
);
5629 /* Now do the same check on the specification expressions. */
5630 saved_specification_expr
= specification_expr
;
5631 specification_expr
= true;
5632 if (sym
->ts
.type
== BT_CHARACTER
5633 && !gfc_resolve_expr (sym
->ts
.u
.cl
->length
))
5637 for (n
= 0; n
< sym
->as
->rank
; n
++)
5639 if (!gfc_resolve_expr (sym
->as
->lower
[n
]))
5641 if (!gfc_resolve_expr (sym
->as
->upper
[n
]))
5644 specification_expr
= saved_specification_expr
;
5647 /* Update the symbol's entry level. */
5648 sym
->entry_id
= current_entry_id
+ 1;
5651 /* If a symbol has been host_associated mark it. This is used latter,
5652 to identify if aliasing is possible via host association. */
5653 if (sym
->attr
.flavor
== FL_VARIABLE
5654 && gfc_current_ns
->parent
5655 && (gfc_current_ns
->parent
== sym
->ns
5656 || (gfc_current_ns
->parent
->parent
5657 && gfc_current_ns
->parent
->parent
== sym
->ns
)))
5658 sym
->attr
.host_assoc
= 1;
5660 if (gfc_current_ns
->proc_name
5661 && sym
->attr
.dimension
5662 && (sym
->ns
!= gfc_current_ns
5663 || sym
->attr
.use_assoc
5664 || sym
->attr
.in_common
))
5665 gfc_current_ns
->proc_name
->attr
.array_outer_dependency
= 1;
5668 if (t
&& !resolve_procedure_expression (e
))
5671 /* F2008, C617 and C1229. */
5672 if (!inquiry_argument
&& (e
->ts
.type
== BT_CLASS
|| e
->ts
.type
== BT_DERIVED
)
5673 && gfc_is_coindexed (e
))
5675 gfc_ref
*ref
, *ref2
= NULL
;
5677 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
5679 if (ref
->type
== REF_COMPONENT
)
5681 if (ref
->type
== REF_ARRAY
&& ref
->u
.ar
.codimen
> 0)
5685 for ( ; ref
; ref
= ref
->next
)
5686 if (ref
->type
== REF_COMPONENT
)
5689 /* Expression itself is not coindexed object. */
5690 if (ref
&& e
->ts
.type
== BT_CLASS
)
5692 gfc_error ("Polymorphic subobject of coindexed object at %L",
5697 /* Expression itself is coindexed object. */
5701 c
= ref2
? ref2
->u
.c
.component
: e
->symtree
->n
.sym
->components
;
5702 for ( ; c
; c
= c
->next
)
5703 if (c
->attr
.allocatable
&& c
->ts
.type
== BT_CLASS
)
5705 gfc_error ("Coindexed object with polymorphic allocatable "
5706 "subcomponent at %L", &e
->where
);
5714 expression_rank (e
);
5716 if (t
&& flag_coarray
== GFC_FCOARRAY_LIB
&& gfc_is_coindexed (e
))
5717 add_caf_get_intrinsic (e
);
5719 /* Simplify cases where access to a parameter array results in a
5720 single constant. Suppress errors since those will have been
5721 issued before, as warnings. */
5722 if (e
->rank
== 0 && sym
->as
&& sym
->attr
.flavor
== FL_PARAMETER
)
5724 gfc_push_suppress_errors ();
5725 gfc_simplify_expr (e
, 1);
5726 gfc_pop_suppress_errors ();
5733 /* Checks to see that the correct symbol has been host associated.
5734 The only situation where this arises is that in which a twice
5735 contained function is parsed after the host association is made.
5736 Therefore, on detecting this, change the symbol in the expression
5737 and convert the array reference into an actual arglist if the old
5738 symbol is a variable. */
5740 check_host_association (gfc_expr
*e
)
5742 gfc_symbol
*sym
, *old_sym
;
5746 gfc_actual_arglist
*arg
, *tail
= NULL
;
5747 bool retval
= e
->expr_type
== EXPR_FUNCTION
;
5749 /* If the expression is the result of substitution in
5750 interface.c(gfc_extend_expr) because there is no way in
5751 which the host association can be wrong. */
5752 if (e
->symtree
== NULL
5753 || e
->symtree
->n
.sym
== NULL
5754 || e
->user_operator
)
5757 old_sym
= e
->symtree
->n
.sym
;
5759 if (gfc_current_ns
->parent
5760 && old_sym
->ns
!= gfc_current_ns
)
5762 /* Use the 'USE' name so that renamed module symbols are
5763 correctly handled. */
5764 gfc_find_symbol (e
->symtree
->name
, gfc_current_ns
, 1, &sym
);
5766 if (sym
&& old_sym
!= sym
5767 && sym
->ts
.type
== old_sym
->ts
.type
5768 && sym
->attr
.flavor
== FL_PROCEDURE
5769 && sym
->attr
.contained
)
5771 /* Clear the shape, since it might not be valid. */
5772 gfc_free_shape (&e
->shape
, e
->rank
);
5774 /* Give the expression the right symtree! */
5775 gfc_find_sym_tree (e
->symtree
->name
, NULL
, 1, &st
);
5776 gcc_assert (st
!= NULL
);
5778 if (old_sym
->attr
.flavor
== FL_PROCEDURE
5779 || e
->expr_type
== EXPR_FUNCTION
)
5781 /* Original was function so point to the new symbol, since
5782 the actual argument list is already attached to the
5784 e
->value
.function
.esym
= NULL
;
5789 /* Original was variable so convert array references into
5790 an actual arglist. This does not need any checking now
5791 since resolve_function will take care of it. */
5792 e
->value
.function
.actual
= NULL
;
5793 e
->expr_type
= EXPR_FUNCTION
;
5796 /* Ambiguity will not arise if the array reference is not
5797 the last reference. */
5798 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
5799 if (ref
->type
== REF_ARRAY
&& ref
->next
== NULL
)
5802 gcc_assert (ref
->type
== REF_ARRAY
);
5804 /* Grab the start expressions from the array ref and
5805 copy them into actual arguments. */
5806 for (n
= 0; n
< ref
->u
.ar
.dimen
; n
++)
5808 arg
= gfc_get_actual_arglist ();
5809 arg
->expr
= gfc_copy_expr (ref
->u
.ar
.start
[n
]);
5810 if (e
->value
.function
.actual
== NULL
)
5811 tail
= e
->value
.function
.actual
= arg
;
5819 /* Dump the reference list and set the rank. */
5820 gfc_free_ref_list (e
->ref
);
5822 e
->rank
= sym
->as
? sym
->as
->rank
: 0;
5825 gfc_resolve_expr (e
);
5829 /* This might have changed! */
5830 return e
->expr_type
== EXPR_FUNCTION
;
5835 gfc_resolve_character_operator (gfc_expr
*e
)
5837 gfc_expr
*op1
= e
->value
.op
.op1
;
5838 gfc_expr
*op2
= e
->value
.op
.op2
;
5839 gfc_expr
*e1
= NULL
;
5840 gfc_expr
*e2
= NULL
;
5842 gcc_assert (e
->value
.op
.op
== INTRINSIC_CONCAT
);
5844 if (op1
->ts
.u
.cl
&& op1
->ts
.u
.cl
->length
)
5845 e1
= gfc_copy_expr (op1
->ts
.u
.cl
->length
);
5846 else if (op1
->expr_type
== EXPR_CONSTANT
)
5847 e1
= gfc_get_int_expr (gfc_charlen_int_kind
, NULL
,
5848 op1
->value
.character
.length
);
5850 if (op2
->ts
.u
.cl
&& op2
->ts
.u
.cl
->length
)
5851 e2
= gfc_copy_expr (op2
->ts
.u
.cl
->length
);
5852 else if (op2
->expr_type
== EXPR_CONSTANT
)
5853 e2
= gfc_get_int_expr (gfc_charlen_int_kind
, NULL
,
5854 op2
->value
.character
.length
);
5856 e
->ts
.u
.cl
= gfc_new_charlen (gfc_current_ns
, NULL
);
5866 e
->ts
.u
.cl
->length
= gfc_add (e1
, e2
);
5867 e
->ts
.u
.cl
->length
->ts
.type
= BT_INTEGER
;
5868 e
->ts
.u
.cl
->length
->ts
.kind
= gfc_charlen_int_kind
;
5869 gfc_simplify_expr (e
->ts
.u
.cl
->length
, 0);
5870 gfc_resolve_expr (e
->ts
.u
.cl
->length
);
5876 /* Ensure that an character expression has a charlen and, if possible, a
5877 length expression. */
5880 fixup_charlen (gfc_expr
*e
)
5882 /* The cases fall through so that changes in expression type and the need
5883 for multiple fixes are picked up. In all circumstances, a charlen should
5884 be available for the middle end to hang a backend_decl on. */
5885 switch (e
->expr_type
)
5888 gfc_resolve_character_operator (e
);
5892 if (e
->expr_type
== EXPR_ARRAY
)
5893 gfc_resolve_character_array_constructor (e
);
5896 case EXPR_SUBSTRING
:
5897 if (!e
->ts
.u
.cl
&& e
->ref
)
5898 gfc_resolve_substring_charlen (e
);
5903 e
->ts
.u
.cl
= gfc_new_charlen (gfc_current_ns
, NULL
);
5910 /* Update an actual argument to include the passed-object for type-bound
5911 procedures at the right position. */
5913 static gfc_actual_arglist
*
5914 update_arglist_pass (gfc_actual_arglist
* lst
, gfc_expr
* po
, unsigned argpos
,
5917 gcc_assert (argpos
> 0);
5921 gfc_actual_arglist
* result
;
5923 result
= gfc_get_actual_arglist ();
5927 result
->name
= name
;
5933 lst
->next
= update_arglist_pass (lst
->next
, po
, argpos
- 1, name
);
5935 lst
= update_arglist_pass (NULL
, po
, argpos
- 1, name
);
5940 /* Extract the passed-object from an EXPR_COMPCALL (a copy of it). */
5943 extract_compcall_passed_object (gfc_expr
* e
)
5947 gcc_assert (e
->expr_type
== EXPR_COMPCALL
);
5949 if (e
->value
.compcall
.base_object
)
5950 po
= gfc_copy_expr (e
->value
.compcall
.base_object
);
5953 po
= gfc_get_expr ();
5954 po
->expr_type
= EXPR_VARIABLE
;
5955 po
->symtree
= e
->symtree
;
5956 po
->ref
= gfc_copy_ref (e
->ref
);
5957 po
->where
= e
->where
;
5960 if (!gfc_resolve_expr (po
))
5967 /* Update the arglist of an EXPR_COMPCALL expression to include the
5971 update_compcall_arglist (gfc_expr
* e
)
5974 gfc_typebound_proc
* tbp
;
5976 tbp
= e
->value
.compcall
.tbp
;
5981 po
= extract_compcall_passed_object (e
);
5985 if (tbp
->nopass
|| e
->value
.compcall
.ignore_pass
)
5991 if (tbp
->pass_arg_num
<= 0)
5994 e
->value
.compcall
.actual
= update_arglist_pass (e
->value
.compcall
.actual
, po
,
6002 /* Extract the passed object from a PPC call (a copy of it). */
6005 extract_ppc_passed_object (gfc_expr
*e
)
6010 po
= gfc_get_expr ();
6011 po
->expr_type
= EXPR_VARIABLE
;
6012 po
->symtree
= e
->symtree
;
6013 po
->ref
= gfc_copy_ref (e
->ref
);
6014 po
->where
= e
->where
;
6016 /* Remove PPC reference. */
6018 while ((*ref
)->next
)
6019 ref
= &(*ref
)->next
;
6020 gfc_free_ref_list (*ref
);
6023 if (!gfc_resolve_expr (po
))
6030 /* Update the actual arglist of a procedure pointer component to include the
6034 update_ppc_arglist (gfc_expr
* e
)
6038 gfc_typebound_proc
* tb
;
6040 ppc
= gfc_get_proc_ptr_comp (e
);
6048 else if (tb
->nopass
)
6051 po
= extract_ppc_passed_object (e
);
6058 gfc_error ("Passed-object at %L must be scalar", &e
->where
);
6063 if (po
->ts
.type
== BT_DERIVED
&& po
->ts
.u
.derived
->attr
.abstract
)
6065 gfc_error ("Base object for procedure-pointer component call at %L is of"
6066 " ABSTRACT type %qs", &e
->where
, po
->ts
.u
.derived
->name
);
6070 gcc_assert (tb
->pass_arg_num
> 0);
6071 e
->value
.compcall
.actual
= update_arglist_pass (e
->value
.compcall
.actual
, po
,
6079 /* Check that the object a TBP is called on is valid, i.e. it must not be
6080 of ABSTRACT type (as in subobject%abstract_parent%tbp()). */
6083 check_typebound_baseobject (gfc_expr
* e
)
6086 bool return_value
= false;
6088 base
= extract_compcall_passed_object (e
);
6092 gcc_assert (base
->ts
.type
== BT_DERIVED
|| base
->ts
.type
== BT_CLASS
);
6094 if (base
->ts
.type
== BT_CLASS
&& !gfc_expr_attr (base
).class_ok
)
6098 if (base
->ts
.type
== BT_DERIVED
&& base
->ts
.u
.derived
->attr
.abstract
)
6100 gfc_error ("Base object for type-bound procedure call at %L is of"
6101 " ABSTRACT type %qs", &e
->where
, base
->ts
.u
.derived
->name
);
6105 /* F08:C1230. If the procedure called is NOPASS,
6106 the base object must be scalar. */
6107 if (e
->value
.compcall
.tbp
->nopass
&& base
->rank
!= 0)
6109 gfc_error ("Base object for NOPASS type-bound procedure call at %L must"
6110 " be scalar", &e
->where
);
6114 return_value
= true;
6117 gfc_free_expr (base
);
6118 return return_value
;
6122 /* Resolve a call to a type-bound procedure, either function or subroutine,
6123 statically from the data in an EXPR_COMPCALL expression. The adapted
6124 arglist and the target-procedure symtree are returned. */
6127 resolve_typebound_static (gfc_expr
* e
, gfc_symtree
** target
,
6128 gfc_actual_arglist
** actual
)
6130 gcc_assert (e
->expr_type
== EXPR_COMPCALL
);
6131 gcc_assert (!e
->value
.compcall
.tbp
->is_generic
);
6133 /* Update the actual arglist for PASS. */
6134 if (!update_compcall_arglist (e
))
6137 *actual
= e
->value
.compcall
.actual
;
6138 *target
= e
->value
.compcall
.tbp
->u
.specific
;
6140 gfc_free_ref_list (e
->ref
);
6142 e
->value
.compcall
.actual
= NULL
;
6144 /* If we find a deferred typebound procedure, check for derived types
6145 that an overriding typebound procedure has not been missed. */
6146 if (e
->value
.compcall
.name
6147 && !e
->value
.compcall
.tbp
->non_overridable
6148 && e
->value
.compcall
.base_object
6149 && e
->value
.compcall
.base_object
->ts
.type
== BT_DERIVED
)
6152 gfc_symbol
*derived
;
6154 /* Use the derived type of the base_object. */
6155 derived
= e
->value
.compcall
.base_object
->ts
.u
.derived
;
6158 /* If necessary, go through the inheritance chain. */
6159 while (!st
&& derived
)
6161 /* Look for the typebound procedure 'name'. */
6162 if (derived
->f2k_derived
&& derived
->f2k_derived
->tb_sym_root
)
6163 st
= gfc_find_symtree (derived
->f2k_derived
->tb_sym_root
,
6164 e
->value
.compcall
.name
);
6166 derived
= gfc_get_derived_super_type (derived
);
6169 /* Now find the specific name in the derived type namespace. */
6170 if (st
&& st
->n
.tb
&& st
->n
.tb
->u
.specific
)
6171 gfc_find_sym_tree (st
->n
.tb
->u
.specific
->name
,
6172 derived
->ns
, 1, &st
);
6180 /* Get the ultimate declared type from an expression. In addition,
6181 return the last class/derived type reference and the copy of the
6182 reference list. If check_types is set true, derived types are
6183 identified as well as class references. */
6185 get_declared_from_expr (gfc_ref
**class_ref
, gfc_ref
**new_ref
,
6186 gfc_expr
*e
, bool check_types
)
6188 gfc_symbol
*declared
;
6195 *new_ref
= gfc_copy_ref (e
->ref
);
6197 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
6199 if (ref
->type
!= REF_COMPONENT
)
6202 if ((ref
->u
.c
.component
->ts
.type
== BT_CLASS
6203 || (check_types
&& gfc_bt_struct (ref
->u
.c
.component
->ts
.type
)))
6204 && ref
->u
.c
.component
->attr
.flavor
!= FL_PROCEDURE
)
6206 declared
= ref
->u
.c
.component
->ts
.u
.derived
;
6212 if (declared
== NULL
)
6213 declared
= e
->symtree
->n
.sym
->ts
.u
.derived
;
6219 /* Given an EXPR_COMPCALL calling a GENERIC typebound procedure, figure out
6220 which of the specific bindings (if any) matches the arglist and transform
6221 the expression into a call of that binding. */
6224 resolve_typebound_generic_call (gfc_expr
* e
, const char **name
)
6226 gfc_typebound_proc
* genproc
;
6227 const char* genname
;
6229 gfc_symbol
*derived
;
6231 gcc_assert (e
->expr_type
== EXPR_COMPCALL
);
6232 genname
= e
->value
.compcall
.name
;
6233 genproc
= e
->value
.compcall
.tbp
;
6235 if (!genproc
->is_generic
)
6238 /* Try the bindings on this type and in the inheritance hierarchy. */
6239 for (; genproc
; genproc
= genproc
->overridden
)
6243 gcc_assert (genproc
->is_generic
);
6244 for (g
= genproc
->u
.generic
; g
; g
= g
->next
)
6247 gfc_actual_arglist
* args
;
6250 gcc_assert (g
->specific
);
6252 if (g
->specific
->error
)
6255 target
= g
->specific
->u
.specific
->n
.sym
;
6257 /* Get the right arglist by handling PASS/NOPASS. */
6258 args
= gfc_copy_actual_arglist (e
->value
.compcall
.actual
);
6259 if (!g
->specific
->nopass
)
6262 po
= extract_compcall_passed_object (e
);
6265 gfc_free_actual_arglist (args
);
6269 gcc_assert (g
->specific
->pass_arg_num
> 0);
6270 gcc_assert (!g
->specific
->error
);
6271 args
= update_arglist_pass (args
, po
, g
->specific
->pass_arg_num
,
6272 g
->specific
->pass_arg
);
6274 resolve_actual_arglist (args
, target
->attr
.proc
,
6275 is_external_proc (target
)
6276 && gfc_sym_get_dummy_args (target
) == NULL
);
6278 /* Check if this arglist matches the formal. */
6279 matches
= gfc_arglist_matches_symbol (&args
, target
);
6281 /* Clean up and break out of the loop if we've found it. */
6282 gfc_free_actual_arglist (args
);
6285 e
->value
.compcall
.tbp
= g
->specific
;
6286 genname
= g
->specific_st
->name
;
6287 /* Pass along the name for CLASS methods, where the vtab
6288 procedure pointer component has to be referenced. */
6296 /* Nothing matching found! */
6297 gfc_error ("Found no matching specific binding for the call to the GENERIC"
6298 " %qs at %L", genname
, &e
->where
);
6302 /* Make sure that we have the right specific instance for the name. */
6303 derived
= get_declared_from_expr (NULL
, NULL
, e
, true);
6305 st
= gfc_find_typebound_proc (derived
, NULL
, genname
, true, &e
->where
);
6307 e
->value
.compcall
.tbp
= st
->n
.tb
;
6313 /* Resolve a call to a type-bound subroutine. */
6316 resolve_typebound_call (gfc_code
* c
, const char **name
, bool *overridable
)
6318 gfc_actual_arglist
* newactual
;
6319 gfc_symtree
* target
;
6321 /* Check that's really a SUBROUTINE. */
6322 if (!c
->expr1
->value
.compcall
.tbp
->subroutine
)
6324 if (!c
->expr1
->value
.compcall
.tbp
->is_generic
6325 && c
->expr1
->value
.compcall
.tbp
->u
.specific
6326 && c
->expr1
->value
.compcall
.tbp
->u
.specific
->n
.sym
6327 && c
->expr1
->value
.compcall
.tbp
->u
.specific
->n
.sym
->attr
.subroutine
)
6328 c
->expr1
->value
.compcall
.tbp
->subroutine
= 1;
6331 gfc_error ("%qs at %L should be a SUBROUTINE",
6332 c
->expr1
->value
.compcall
.name
, &c
->loc
);
6337 if (!check_typebound_baseobject (c
->expr1
))
6340 /* Pass along the name for CLASS methods, where the vtab
6341 procedure pointer component has to be referenced. */
6343 *name
= c
->expr1
->value
.compcall
.name
;
6345 if (!resolve_typebound_generic_call (c
->expr1
, name
))
6348 /* Pass along the NON_OVERRIDABLE attribute of the specific TBP. */
6350 *overridable
= !c
->expr1
->value
.compcall
.tbp
->non_overridable
;
6352 /* Transform into an ordinary EXEC_CALL for now. */
6354 if (!resolve_typebound_static (c
->expr1
, &target
, &newactual
))
6357 c
->ext
.actual
= newactual
;
6358 c
->symtree
= target
;
6359 c
->op
= (c
->expr1
->value
.compcall
.assign
? EXEC_ASSIGN_CALL
: EXEC_CALL
);
6361 gcc_assert (!c
->expr1
->ref
&& !c
->expr1
->value
.compcall
.actual
);
6363 gfc_free_expr (c
->expr1
);
6364 c
->expr1
= gfc_get_expr ();
6365 c
->expr1
->expr_type
= EXPR_FUNCTION
;
6366 c
->expr1
->symtree
= target
;
6367 c
->expr1
->where
= c
->loc
;
6369 return resolve_call (c
);
6373 /* Resolve a component-call expression. */
6375 resolve_compcall (gfc_expr
* e
, const char **name
)
6377 gfc_actual_arglist
* newactual
;
6378 gfc_symtree
* target
;
6380 /* Check that's really a FUNCTION. */
6381 if (!e
->value
.compcall
.tbp
->function
)
6383 gfc_error ("%qs at %L should be a FUNCTION",
6384 e
->value
.compcall
.name
, &e
->where
);
6388 /* These must not be assign-calls! */
6389 gcc_assert (!e
->value
.compcall
.assign
);
6391 if (!check_typebound_baseobject (e
))
6394 /* Pass along the name for CLASS methods, where the vtab
6395 procedure pointer component has to be referenced. */
6397 *name
= e
->value
.compcall
.name
;
6399 if (!resolve_typebound_generic_call (e
, name
))
6401 gcc_assert (!e
->value
.compcall
.tbp
->is_generic
);
6403 /* Take the rank from the function's symbol. */
6404 if (e
->value
.compcall
.tbp
->u
.specific
->n
.sym
->as
)
6405 e
->rank
= e
->value
.compcall
.tbp
->u
.specific
->n
.sym
->as
->rank
;
6407 /* For now, we simply transform it into an EXPR_FUNCTION call with the same
6408 arglist to the TBP's binding target. */
6410 if (!resolve_typebound_static (e
, &target
, &newactual
))
6413 e
->value
.function
.actual
= newactual
;
6414 e
->value
.function
.name
= NULL
;
6415 e
->value
.function
.esym
= target
->n
.sym
;
6416 e
->value
.function
.isym
= NULL
;
6417 e
->symtree
= target
;
6418 e
->ts
= target
->n
.sym
->ts
;
6419 e
->expr_type
= EXPR_FUNCTION
;
6421 /* Resolution is not necessary if this is a class subroutine; this
6422 function only has to identify the specific proc. Resolution of
6423 the call will be done next in resolve_typebound_call. */
6424 return gfc_resolve_expr (e
);
6428 static bool resolve_fl_derived (gfc_symbol
*sym
);
6431 /* Resolve a typebound function, or 'method'. First separate all
6432 the non-CLASS references by calling resolve_compcall directly. */
6435 resolve_typebound_function (gfc_expr
* e
)
6437 gfc_symbol
*declared
;
6449 /* Deal with typebound operators for CLASS objects. */
6450 expr
= e
->value
.compcall
.base_object
;
6451 overridable
= !e
->value
.compcall
.tbp
->non_overridable
;
6452 if (expr
&& expr
->ts
.type
== BT_CLASS
&& e
->value
.compcall
.name
)
6454 /* If the base_object is not a variable, the corresponding actual
6455 argument expression must be stored in e->base_expression so
6456 that the corresponding tree temporary can be used as the base
6457 object in gfc_conv_procedure_call. */
6458 if (expr
->expr_type
!= EXPR_VARIABLE
)
6460 gfc_actual_arglist
*args
;
6462 for (args
= e
->value
.function
.actual
; args
; args
= args
->next
)
6464 if (expr
== args
->expr
)
6469 /* Since the typebound operators are generic, we have to ensure
6470 that any delays in resolution are corrected and that the vtab
6473 declared
= ts
.u
.derived
;
6474 c
= gfc_find_component (declared
, "_vptr", true, true, NULL
);
6475 if (c
->ts
.u
.derived
== NULL
)
6476 c
->ts
.u
.derived
= gfc_find_derived_vtab (declared
);
6478 if (!resolve_compcall (e
, &name
))
6481 /* Use the generic name if it is there. */
6482 name
= name
? name
: e
->value
.function
.esym
->name
;
6483 e
->symtree
= expr
->symtree
;
6484 e
->ref
= gfc_copy_ref (expr
->ref
);
6485 get_declared_from_expr (&class_ref
, NULL
, e
, false);
6487 /* Trim away the extraneous references that emerge from nested
6488 use of interface.c (extend_expr). */
6489 if (class_ref
&& class_ref
->next
)
6491 gfc_free_ref_list (class_ref
->next
);
6492 class_ref
->next
= NULL
;
6494 else if (e
->ref
&& !class_ref
&& expr
->ts
.type
!= BT_CLASS
)
6496 gfc_free_ref_list (e
->ref
);
6500 gfc_add_vptr_component (e
);
6501 gfc_add_component_ref (e
, name
);
6502 e
->value
.function
.esym
= NULL
;
6503 if (expr
->expr_type
!= EXPR_VARIABLE
)
6504 e
->base_expr
= expr
;
6509 return resolve_compcall (e
, NULL
);
6511 if (!resolve_ref (e
))
6514 /* Get the CLASS declared type. */
6515 declared
= get_declared_from_expr (&class_ref
, &new_ref
, e
, true);
6517 if (!resolve_fl_derived (declared
))
6520 /* Weed out cases of the ultimate component being a derived type. */
6521 if ((class_ref
&& gfc_bt_struct (class_ref
->u
.c
.component
->ts
.type
))
6522 || (!class_ref
&& st
->n
.sym
->ts
.type
!= BT_CLASS
))
6524 gfc_free_ref_list (new_ref
);
6525 return resolve_compcall (e
, NULL
);
6528 c
= gfc_find_component (declared
, "_data", true, true, NULL
);
6529 declared
= c
->ts
.u
.derived
;
6531 /* Treat the call as if it is a typebound procedure, in order to roll
6532 out the correct name for the specific function. */
6533 if (!resolve_compcall (e
, &name
))
6535 gfc_free_ref_list (new_ref
);
6542 /* Convert the expression to a procedure pointer component call. */
6543 e
->value
.function
.esym
= NULL
;
6549 /* '_vptr' points to the vtab, which contains the procedure pointers. */
6550 gfc_add_vptr_component (e
);
6551 gfc_add_component_ref (e
, name
);
6553 /* Recover the typespec for the expression. This is really only
6554 necessary for generic procedures, where the additional call
6555 to gfc_add_component_ref seems to throw the collection of the
6556 correct typespec. */
6560 gfc_free_ref_list (new_ref
);
6565 /* Resolve a typebound subroutine, or 'method'. First separate all
6566 the non-CLASS references by calling resolve_typebound_call
6570 resolve_typebound_subroutine (gfc_code
*code
)
6572 gfc_symbol
*declared
;
6582 st
= code
->expr1
->symtree
;
6584 /* Deal with typebound operators for CLASS objects. */
6585 expr
= code
->expr1
->value
.compcall
.base_object
;
6586 overridable
= !code
->expr1
->value
.compcall
.tbp
->non_overridable
;
6587 if (expr
&& expr
->ts
.type
== BT_CLASS
&& code
->expr1
->value
.compcall
.name
)
6589 /* If the base_object is not a variable, the corresponding actual
6590 argument expression must be stored in e->base_expression so
6591 that the corresponding tree temporary can be used as the base
6592 object in gfc_conv_procedure_call. */
6593 if (expr
->expr_type
!= EXPR_VARIABLE
)
6595 gfc_actual_arglist
*args
;
6597 args
= code
->expr1
->value
.function
.actual
;
6598 for (; args
; args
= args
->next
)
6599 if (expr
== args
->expr
)
6603 /* Since the typebound operators are generic, we have to ensure
6604 that any delays in resolution are corrected and that the vtab
6606 declared
= expr
->ts
.u
.derived
;
6607 c
= gfc_find_component (declared
, "_vptr", true, true, NULL
);
6608 if (c
->ts
.u
.derived
== NULL
)
6609 c
->ts
.u
.derived
= gfc_find_derived_vtab (declared
);
6611 if (!resolve_typebound_call (code
, &name
, NULL
))
6614 /* Use the generic name if it is there. */
6615 name
= name
? name
: code
->expr1
->value
.function
.esym
->name
;
6616 code
->expr1
->symtree
= expr
->symtree
;
6617 code
->expr1
->ref
= gfc_copy_ref (expr
->ref
);
6619 /* Trim away the extraneous references that emerge from nested
6620 use of interface.c (extend_expr). */
6621 get_declared_from_expr (&class_ref
, NULL
, code
->expr1
, false);
6622 if (class_ref
&& class_ref
->next
)
6624 gfc_free_ref_list (class_ref
->next
);
6625 class_ref
->next
= NULL
;
6627 else if (code
->expr1
->ref
&& !class_ref
)
6629 gfc_free_ref_list (code
->expr1
->ref
);
6630 code
->expr1
->ref
= NULL
;
6633 /* Now use the procedure in the vtable. */
6634 gfc_add_vptr_component (code
->expr1
);
6635 gfc_add_component_ref (code
->expr1
, name
);
6636 code
->expr1
->value
.function
.esym
= NULL
;
6637 if (expr
->expr_type
!= EXPR_VARIABLE
)
6638 code
->expr1
->base_expr
= expr
;
6643 return resolve_typebound_call (code
, NULL
, NULL
);
6645 if (!resolve_ref (code
->expr1
))
6648 /* Get the CLASS declared type. */
6649 get_declared_from_expr (&class_ref
, &new_ref
, code
->expr1
, true);
6651 /* Weed out cases of the ultimate component being a derived type. */
6652 if ((class_ref
&& gfc_bt_struct (class_ref
->u
.c
.component
->ts
.type
))
6653 || (!class_ref
&& st
->n
.sym
->ts
.type
!= BT_CLASS
))
6655 gfc_free_ref_list (new_ref
);
6656 return resolve_typebound_call (code
, NULL
, NULL
);
6659 if (!resolve_typebound_call (code
, &name
, &overridable
))
6661 gfc_free_ref_list (new_ref
);
6664 ts
= code
->expr1
->ts
;
6668 /* Convert the expression to a procedure pointer component call. */
6669 code
->expr1
->value
.function
.esym
= NULL
;
6670 code
->expr1
->symtree
= st
;
6673 code
->expr1
->ref
= new_ref
;
6675 /* '_vptr' points to the vtab, which contains the procedure pointers. */
6676 gfc_add_vptr_component (code
->expr1
);
6677 gfc_add_component_ref (code
->expr1
, name
);
6679 /* Recover the typespec for the expression. This is really only
6680 necessary for generic procedures, where the additional call
6681 to gfc_add_component_ref seems to throw the collection of the
6682 correct typespec. */
6683 code
->expr1
->ts
= ts
;
6686 gfc_free_ref_list (new_ref
);
6692 /* Resolve a CALL to a Procedure Pointer Component (Subroutine). */
6695 resolve_ppc_call (gfc_code
* c
)
6697 gfc_component
*comp
;
6699 comp
= gfc_get_proc_ptr_comp (c
->expr1
);
6700 gcc_assert (comp
!= NULL
);
6702 c
->resolved_sym
= c
->expr1
->symtree
->n
.sym
;
6703 c
->expr1
->expr_type
= EXPR_VARIABLE
;
6705 if (!comp
->attr
.subroutine
)
6706 gfc_add_subroutine (&comp
->attr
, comp
->name
, &c
->expr1
->where
);
6708 if (!resolve_ref (c
->expr1
))
6711 if (!update_ppc_arglist (c
->expr1
))
6714 c
->ext
.actual
= c
->expr1
->value
.compcall
.actual
;
6716 if (!resolve_actual_arglist (c
->ext
.actual
, comp
->attr
.proc
,
6717 !(comp
->ts
.interface
6718 && comp
->ts
.interface
->formal
)))
6721 if (!pure_subroutine (comp
->ts
.interface
, comp
->name
, &c
->expr1
->where
))
6724 gfc_ppc_use (comp
, &c
->expr1
->value
.compcall
.actual
, &c
->expr1
->where
);
6730 /* Resolve a Function Call to a Procedure Pointer Component (Function). */
6733 resolve_expr_ppc (gfc_expr
* e
)
6735 gfc_component
*comp
;
6737 comp
= gfc_get_proc_ptr_comp (e
);
6738 gcc_assert (comp
!= NULL
);
6740 /* Convert to EXPR_FUNCTION. */
6741 e
->expr_type
= EXPR_FUNCTION
;
6742 e
->value
.function
.isym
= NULL
;
6743 e
->value
.function
.actual
= e
->value
.compcall
.actual
;
6745 if (comp
->as
!= NULL
)
6746 e
->rank
= comp
->as
->rank
;
6748 if (!comp
->attr
.function
)
6749 gfc_add_function (&comp
->attr
, comp
->name
, &e
->where
);
6751 if (!resolve_ref (e
))
6754 if (!resolve_actual_arglist (e
->value
.function
.actual
, comp
->attr
.proc
,
6755 !(comp
->ts
.interface
6756 && comp
->ts
.interface
->formal
)))
6759 if (!update_ppc_arglist (e
))
6762 if (!check_pure_function(e
))
6765 gfc_ppc_use (comp
, &e
->value
.compcall
.actual
, &e
->where
);
6772 gfc_is_expandable_expr (gfc_expr
*e
)
6774 gfc_constructor
*con
;
6776 if (e
->expr_type
== EXPR_ARRAY
)
6778 /* Traverse the constructor looking for variables that are flavor
6779 parameter. Parameters must be expanded since they are fully used at
6781 con
= gfc_constructor_first (e
->value
.constructor
);
6782 for (; con
; con
= gfc_constructor_next (con
))
6784 if (con
->expr
->expr_type
== EXPR_VARIABLE
6785 && con
->expr
->symtree
6786 && (con
->expr
->symtree
->n
.sym
->attr
.flavor
== FL_PARAMETER
6787 || con
->expr
->symtree
->n
.sym
->attr
.flavor
== FL_VARIABLE
))
6789 if (con
->expr
->expr_type
== EXPR_ARRAY
6790 && gfc_is_expandable_expr (con
->expr
))
6799 /* Sometimes variables in specification expressions of the result
6800 of module procedures in submodules wind up not being the 'real'
6801 dummy. Find this, if possible, in the namespace of the first
6805 fixup_unique_dummy (gfc_expr
*e
)
6807 gfc_symtree
*st
= NULL
;
6808 gfc_symbol
*s
= NULL
;
6810 if (e
->symtree
->n
.sym
->ns
->proc_name
6811 && e
->symtree
->n
.sym
->ns
->proc_name
->formal
)
6812 s
= e
->symtree
->n
.sym
->ns
->proc_name
->formal
->sym
;
6815 st
= gfc_find_symtree (s
->ns
->sym_root
, e
->symtree
->n
.sym
->name
);
6818 && st
->n
.sym
!= NULL
6819 && st
->n
.sym
->attr
.dummy
)
6823 /* Resolve an expression. That is, make sure that types of operands agree
6824 with their operators, intrinsic operators are converted to function calls
6825 for overloaded types and unresolved function references are resolved. */
6828 gfc_resolve_expr (gfc_expr
*e
)
6831 bool inquiry_save
, actual_arg_save
, first_actual_arg_save
;
6836 /* inquiry_argument only applies to variables. */
6837 inquiry_save
= inquiry_argument
;
6838 actual_arg_save
= actual_arg
;
6839 first_actual_arg_save
= first_actual_arg
;
6841 if (e
->expr_type
!= EXPR_VARIABLE
)
6843 inquiry_argument
= false;
6845 first_actual_arg
= false;
6847 else if (e
->symtree
!= NULL
6848 && *e
->symtree
->name
== '@'
6849 && e
->symtree
->n
.sym
->attr
.dummy
)
6851 /* Deal with submodule specification expressions that are not
6852 found to be referenced in module.c(read_cleanup). */
6853 fixup_unique_dummy (e
);
6856 switch (e
->expr_type
)
6859 t
= resolve_operator (e
);
6865 if (check_host_association (e
))
6866 t
= resolve_function (e
);
6868 t
= resolve_variable (e
);
6870 if (e
->ts
.type
== BT_CHARACTER
&& e
->ts
.u
.cl
== NULL
&& e
->ref
6871 && e
->ref
->type
!= REF_SUBSTRING
)
6872 gfc_resolve_substring_charlen (e
);
6877 t
= resolve_typebound_function (e
);
6880 case EXPR_SUBSTRING
:
6881 t
= resolve_ref (e
);
6890 t
= resolve_expr_ppc (e
);
6895 if (!resolve_ref (e
))
6898 t
= gfc_resolve_array_constructor (e
);
6899 /* Also try to expand a constructor. */
6902 expression_rank (e
);
6903 if (gfc_is_constant_expr (e
) || gfc_is_expandable_expr (e
))
6904 gfc_expand_constructor (e
, false);
6907 /* This provides the opportunity for the length of constructors with
6908 character valued function elements to propagate the string length
6909 to the expression. */
6910 if (t
&& e
->ts
.type
== BT_CHARACTER
)
6912 /* For efficiency, we call gfc_expand_constructor for BT_CHARACTER
6913 here rather then add a duplicate test for it above. */
6914 gfc_expand_constructor (e
, false);
6915 t
= gfc_resolve_character_array_constructor (e
);
6920 case EXPR_STRUCTURE
:
6921 t
= resolve_ref (e
);
6925 t
= resolve_structure_cons (e
, 0);
6929 t
= gfc_simplify_expr (e
, 0);
6933 gfc_internal_error ("gfc_resolve_expr(): Bad expression type");
6936 if (e
->ts
.type
== BT_CHARACTER
&& t
&& !e
->ts
.u
.cl
)
6939 inquiry_argument
= inquiry_save
;
6940 actual_arg
= actual_arg_save
;
6941 first_actual_arg
= first_actual_arg_save
;
6947 /* Resolve an expression from an iterator. They must be scalar and have
6948 INTEGER or (optionally) REAL type. */
6951 gfc_resolve_iterator_expr (gfc_expr
*expr
, bool real_ok
,
6952 const char *name_msgid
)
6954 if (!gfc_resolve_expr (expr
))
6957 if (expr
->rank
!= 0)
6959 gfc_error ("%s at %L must be a scalar", _(name_msgid
), &expr
->where
);
6963 if (expr
->ts
.type
!= BT_INTEGER
)
6965 if (expr
->ts
.type
== BT_REAL
)
6968 return gfc_notify_std (GFC_STD_F95_DEL
,
6969 "%s at %L must be integer",
6970 _(name_msgid
), &expr
->where
);
6973 gfc_error ("%s at %L must be INTEGER", _(name_msgid
),
6980 gfc_error ("%s at %L must be INTEGER", _(name_msgid
), &expr
->where
);
6988 /* Resolve the expressions in an iterator structure. If REAL_OK is
6989 false allow only INTEGER type iterators, otherwise allow REAL types.
6990 Set own_scope to true for ac-implied-do and data-implied-do as those
6991 have a separate scope such that, e.g., a INTENT(IN) doesn't apply. */
6994 gfc_resolve_iterator (gfc_iterator
*iter
, bool real_ok
, bool own_scope
)
6996 if (!gfc_resolve_iterator_expr (iter
->var
, real_ok
, "Loop variable"))
6999 if (!gfc_check_vardef_context (iter
->var
, false, false, own_scope
,
7000 _("iterator variable")))
7003 if (!gfc_resolve_iterator_expr (iter
->start
, real_ok
,
7004 "Start expression in DO loop"))
7007 if (!gfc_resolve_iterator_expr (iter
->end
, real_ok
,
7008 "End expression in DO loop"))
7011 if (!gfc_resolve_iterator_expr (iter
->step
, real_ok
,
7012 "Step expression in DO loop"))
7015 if (iter
->step
->expr_type
== EXPR_CONSTANT
)
7017 if ((iter
->step
->ts
.type
== BT_INTEGER
7018 && mpz_cmp_ui (iter
->step
->value
.integer
, 0) == 0)
7019 || (iter
->step
->ts
.type
== BT_REAL
7020 && mpfr_sgn (iter
->step
->value
.real
) == 0))
7022 gfc_error ("Step expression in DO loop at %L cannot be zero",
7023 &iter
->step
->where
);
7028 /* Convert start, end, and step to the same type as var. */
7029 if (iter
->start
->ts
.kind
!= iter
->var
->ts
.kind
7030 || iter
->start
->ts
.type
!= iter
->var
->ts
.type
)
7031 gfc_convert_type (iter
->start
, &iter
->var
->ts
, 1);
7033 if (iter
->end
->ts
.kind
!= iter
->var
->ts
.kind
7034 || iter
->end
->ts
.type
!= iter
->var
->ts
.type
)
7035 gfc_convert_type (iter
->end
, &iter
->var
->ts
, 1);
7037 if (iter
->step
->ts
.kind
!= iter
->var
->ts
.kind
7038 || iter
->step
->ts
.type
!= iter
->var
->ts
.type
)
7039 gfc_convert_type (iter
->step
, &iter
->var
->ts
, 1);
7041 if (iter
->start
->expr_type
== EXPR_CONSTANT
7042 && iter
->end
->expr_type
== EXPR_CONSTANT
7043 && iter
->step
->expr_type
== EXPR_CONSTANT
)
7046 if (iter
->start
->ts
.type
== BT_INTEGER
)
7048 sgn
= mpz_cmp_ui (iter
->step
->value
.integer
, 0);
7049 cmp
= mpz_cmp (iter
->end
->value
.integer
, iter
->start
->value
.integer
);
7053 sgn
= mpfr_sgn (iter
->step
->value
.real
);
7054 cmp
= mpfr_cmp (iter
->end
->value
.real
, iter
->start
->value
.real
);
7056 if (warn_zerotrip
&& ((sgn
> 0 && cmp
< 0) || (sgn
< 0 && cmp
> 0)))
7057 gfc_warning (OPT_Wzerotrip
,
7058 "DO loop at %L will be executed zero times",
7059 &iter
->step
->where
);
7062 if (iter
->end
->expr_type
== EXPR_CONSTANT
7063 && iter
->end
->ts
.type
== BT_INTEGER
7064 && iter
->step
->expr_type
== EXPR_CONSTANT
7065 && iter
->step
->ts
.type
== BT_INTEGER
7066 && (mpz_cmp_si (iter
->step
->value
.integer
, -1L) == 0
7067 || mpz_cmp_si (iter
->step
->value
.integer
, 1L) == 0))
7069 bool is_step_positive
= mpz_cmp_ui (iter
->step
->value
.integer
, 1) == 0;
7070 int k
= gfc_validate_kind (BT_INTEGER
, iter
->end
->ts
.kind
, false);
7072 if (is_step_positive
7073 && mpz_cmp (iter
->end
->value
.integer
, gfc_integer_kinds
[k
].huge
) == 0)
7074 gfc_warning (OPT_Wundefined_do_loop
,
7075 "DO loop at %L is undefined as it overflows",
7076 &iter
->step
->where
);
7077 else if (!is_step_positive
7078 && mpz_cmp (iter
->end
->value
.integer
,
7079 gfc_integer_kinds
[k
].min_int
) == 0)
7080 gfc_warning (OPT_Wundefined_do_loop
,
7081 "DO loop at %L is undefined as it underflows",
7082 &iter
->step
->where
);
7089 /* Traversal function for find_forall_index. f == 2 signals that
7090 that variable itself is not to be checked - only the references. */
7093 forall_index (gfc_expr
*expr
, gfc_symbol
*sym
, int *f
)
7095 if (expr
->expr_type
!= EXPR_VARIABLE
)
7098 /* A scalar assignment */
7099 if (!expr
->ref
|| *f
== 1)
7101 if (expr
->symtree
->n
.sym
== sym
)
7113 /* Check whether the FORALL index appears in the expression or not.
7114 Returns true if SYM is found in EXPR. */
7117 find_forall_index (gfc_expr
*expr
, gfc_symbol
*sym
, int f
)
7119 if (gfc_traverse_expr (expr
, sym
, forall_index
, f
))
7126 /* Resolve a list of FORALL iterators. The FORALL index-name is constrained
7127 to be a scalar INTEGER variable. The subscripts and stride are scalar
7128 INTEGERs, and if stride is a constant it must be nonzero.
7129 Furthermore "A subscript or stride in a forall-triplet-spec shall
7130 not contain a reference to any index-name in the
7131 forall-triplet-spec-list in which it appears." (7.5.4.1) */
7134 resolve_forall_iterators (gfc_forall_iterator
*it
)
7136 gfc_forall_iterator
*iter
, *iter2
;
7138 for (iter
= it
; iter
; iter
= iter
->next
)
7140 if (gfc_resolve_expr (iter
->var
)
7141 && (iter
->var
->ts
.type
!= BT_INTEGER
|| iter
->var
->rank
!= 0))
7142 gfc_error ("FORALL index-name at %L must be a scalar INTEGER",
7145 if (gfc_resolve_expr (iter
->start
)
7146 && (iter
->start
->ts
.type
!= BT_INTEGER
|| iter
->start
->rank
!= 0))
7147 gfc_error ("FORALL start expression at %L must be a scalar INTEGER",
7148 &iter
->start
->where
);
7149 if (iter
->var
->ts
.kind
!= iter
->start
->ts
.kind
)
7150 gfc_convert_type (iter
->start
, &iter
->var
->ts
, 1);
7152 if (gfc_resolve_expr (iter
->end
)
7153 && (iter
->end
->ts
.type
!= BT_INTEGER
|| iter
->end
->rank
!= 0))
7154 gfc_error ("FORALL end expression at %L must be a scalar INTEGER",
7156 if (iter
->var
->ts
.kind
!= iter
->end
->ts
.kind
)
7157 gfc_convert_type (iter
->end
, &iter
->var
->ts
, 1);
7159 if (gfc_resolve_expr (iter
->stride
))
7161 if (iter
->stride
->ts
.type
!= BT_INTEGER
|| iter
->stride
->rank
!= 0)
7162 gfc_error ("FORALL stride expression at %L must be a scalar %s",
7163 &iter
->stride
->where
, "INTEGER");
7165 if (iter
->stride
->expr_type
== EXPR_CONSTANT
7166 && mpz_cmp_ui (iter
->stride
->value
.integer
, 0) == 0)
7167 gfc_error ("FORALL stride expression at %L cannot be zero",
7168 &iter
->stride
->where
);
7170 if (iter
->var
->ts
.kind
!= iter
->stride
->ts
.kind
)
7171 gfc_convert_type (iter
->stride
, &iter
->var
->ts
, 1);
7174 for (iter
= it
; iter
; iter
= iter
->next
)
7175 for (iter2
= iter
; iter2
; iter2
= iter2
->next
)
7177 if (find_forall_index (iter2
->start
, iter
->var
->symtree
->n
.sym
, 0)
7178 || find_forall_index (iter2
->end
, iter
->var
->symtree
->n
.sym
, 0)
7179 || find_forall_index (iter2
->stride
, iter
->var
->symtree
->n
.sym
, 0))
7180 gfc_error ("FORALL index %qs may not appear in triplet "
7181 "specification at %L", iter
->var
->symtree
->name
,
7182 &iter2
->start
->where
);
7187 /* Given a pointer to a symbol that is a derived type, see if it's
7188 inaccessible, i.e. if it's defined in another module and the components are
7189 PRIVATE. The search is recursive if necessary. Returns zero if no
7190 inaccessible components are found, nonzero otherwise. */
7193 derived_inaccessible (gfc_symbol
*sym
)
7197 if (sym
->attr
.use_assoc
&& sym
->attr
.private_comp
)
7200 for (c
= sym
->components
; c
; c
= c
->next
)
7202 /* Prevent an infinite loop through this function. */
7203 if (c
->ts
.type
== BT_DERIVED
&& c
->attr
.pointer
7204 && sym
== c
->ts
.u
.derived
)
7207 if (c
->ts
.type
== BT_DERIVED
&& derived_inaccessible (c
->ts
.u
.derived
))
7215 /* Resolve the argument of a deallocate expression. The expression must be
7216 a pointer or a full array. */
7219 resolve_deallocate_expr (gfc_expr
*e
)
7221 symbol_attribute attr
;
7222 int allocatable
, pointer
;
7228 if (!gfc_resolve_expr (e
))
7231 if (e
->expr_type
!= EXPR_VARIABLE
)
7234 sym
= e
->symtree
->n
.sym
;
7235 unlimited
= UNLIMITED_POLY(sym
);
7237 if (sym
->ts
.type
== BT_CLASS
)
7239 allocatable
= CLASS_DATA (sym
)->attr
.allocatable
;
7240 pointer
= CLASS_DATA (sym
)->attr
.class_pointer
;
7244 allocatable
= sym
->attr
.allocatable
;
7245 pointer
= sym
->attr
.pointer
;
7247 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
7252 if (ref
->u
.ar
.type
!= AR_FULL
7253 && !(ref
->u
.ar
.type
== AR_ELEMENT
&& ref
->u
.ar
.as
->rank
== 0
7254 && ref
->u
.ar
.codimen
&& gfc_ref_this_image (ref
)))
7259 c
= ref
->u
.c
.component
;
7260 if (c
->ts
.type
== BT_CLASS
)
7262 allocatable
= CLASS_DATA (c
)->attr
.allocatable
;
7263 pointer
= CLASS_DATA (c
)->attr
.class_pointer
;
7267 allocatable
= c
->attr
.allocatable
;
7268 pointer
= c
->attr
.pointer
;
7279 attr
= gfc_expr_attr (e
);
7281 if (allocatable
== 0 && attr
.pointer
== 0 && !unlimited
)
7284 gfc_error ("Allocate-object at %L must be ALLOCATABLE or a POINTER",
7290 if (gfc_is_coindexed (e
))
7292 gfc_error ("Coindexed allocatable object at %L", &e
->where
);
7297 && !gfc_check_vardef_context (e
, true, true, false,
7298 _("DEALLOCATE object")))
7300 if (!gfc_check_vardef_context (e
, false, true, false,
7301 _("DEALLOCATE object")))
7308 /* Returns true if the expression e contains a reference to the symbol sym. */
7310 sym_in_expr (gfc_expr
*e
, gfc_symbol
*sym
, int *f ATTRIBUTE_UNUSED
)
7312 if (e
->expr_type
== EXPR_VARIABLE
&& e
->symtree
->n
.sym
== sym
)
7319 gfc_find_sym_in_expr (gfc_symbol
*sym
, gfc_expr
*e
)
7321 return gfc_traverse_expr (e
, sym
, sym_in_expr
, 0);
7325 /* Given the expression node e for an allocatable/pointer of derived type to be
7326 allocated, get the expression node to be initialized afterwards (needed for
7327 derived types with default initializers, and derived types with allocatable
7328 components that need nullification.) */
7331 gfc_expr_to_initialize (gfc_expr
*e
)
7337 result
= gfc_copy_expr (e
);
7339 /* Change the last array reference from AR_ELEMENT to AR_FULL. */
7340 for (ref
= result
->ref
; ref
; ref
= ref
->next
)
7341 if (ref
->type
== REF_ARRAY
&& ref
->next
== NULL
)
7343 ref
->u
.ar
.type
= AR_FULL
;
7345 for (i
= 0; i
< ref
->u
.ar
.dimen
; i
++)
7346 ref
->u
.ar
.start
[i
] = ref
->u
.ar
.end
[i
] = ref
->u
.ar
.stride
[i
] = NULL
;
7351 gfc_free_shape (&result
->shape
, result
->rank
);
7353 /* Recalculate rank, shape, etc. */
7354 gfc_resolve_expr (result
);
7359 /* If the last ref of an expression is an array ref, return a copy of the
7360 expression with that one removed. Otherwise, a copy of the original
7361 expression. This is used for allocate-expressions and pointer assignment
7362 LHS, where there may be an array specification that needs to be stripped
7363 off when using gfc_check_vardef_context. */
7366 remove_last_array_ref (gfc_expr
* e
)
7371 e2
= gfc_copy_expr (e
);
7372 for (r
= &e2
->ref
; *r
; r
= &(*r
)->next
)
7373 if ((*r
)->type
== REF_ARRAY
&& !(*r
)->next
)
7375 gfc_free_ref_list (*r
);
7384 /* Used in resolve_allocate_expr to check that a allocation-object and
7385 a source-expr are conformable. This does not catch all possible
7386 cases; in particular a runtime checking is needed. */
7389 conformable_arrays (gfc_expr
*e1
, gfc_expr
*e2
)
7392 for (tail
= e2
->ref
; tail
&& tail
->next
; tail
= tail
->next
);
7394 /* First compare rank. */
7395 if ((tail
&& e1
->rank
!= tail
->u
.ar
.as
->rank
)
7396 || (!tail
&& e1
->rank
!= e2
->rank
))
7398 gfc_error ("Source-expr at %L must be scalar or have the "
7399 "same rank as the allocate-object at %L",
7400 &e1
->where
, &e2
->where
);
7411 for (i
= 0; i
< e1
->rank
; i
++)
7413 if (tail
->u
.ar
.start
[i
] == NULL
)
7416 if (tail
->u
.ar
.end
[i
])
7418 mpz_set (s
, tail
->u
.ar
.end
[i
]->value
.integer
);
7419 mpz_sub (s
, s
, tail
->u
.ar
.start
[i
]->value
.integer
);
7420 mpz_add_ui (s
, s
, 1);
7424 mpz_set (s
, tail
->u
.ar
.start
[i
]->value
.integer
);
7427 if (mpz_cmp (e1
->shape
[i
], s
) != 0)
7429 gfc_error ("Source-expr at %L and allocate-object at %L must "
7430 "have the same shape", &e1
->where
, &e2
->where
);
7443 /* Resolve the expression in an ALLOCATE statement, doing the additional
7444 checks to see whether the expression is OK or not. The expression must
7445 have a trailing array reference that gives the size of the array. */
7448 resolve_allocate_expr (gfc_expr
*e
, gfc_code
*code
, bool *array_alloc_wo_spec
)
7450 int i
, pointer
, allocatable
, dimension
, is_abstract
;
7454 symbol_attribute attr
;
7455 gfc_ref
*ref
, *ref2
;
7458 gfc_symbol
*sym
= NULL
;
7463 /* Mark the utmost array component as being in allocate to allow DIMEN_STAR
7464 checking of coarrays. */
7465 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
7466 if (ref
->next
== NULL
)
7469 if (ref
&& ref
->type
== REF_ARRAY
)
7470 ref
->u
.ar
.in_allocate
= true;
7472 if (!gfc_resolve_expr (e
))
7475 /* Make sure the expression is allocatable or a pointer. If it is
7476 pointer, the next-to-last reference must be a pointer. */
7480 sym
= e
->symtree
->n
.sym
;
7482 /* Check whether ultimate component is abstract and CLASS. */
7485 /* Is the allocate-object unlimited polymorphic? */
7486 unlimited
= UNLIMITED_POLY(e
);
7488 if (e
->expr_type
!= EXPR_VARIABLE
)
7491 attr
= gfc_expr_attr (e
);
7492 pointer
= attr
.pointer
;
7493 dimension
= attr
.dimension
;
7494 codimension
= attr
.codimension
;
7498 if (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
))
7500 allocatable
= CLASS_DATA (sym
)->attr
.allocatable
;
7501 pointer
= CLASS_DATA (sym
)->attr
.class_pointer
;
7502 dimension
= CLASS_DATA (sym
)->attr
.dimension
;
7503 codimension
= CLASS_DATA (sym
)->attr
.codimension
;
7504 is_abstract
= CLASS_DATA (sym
)->attr
.abstract
;
7508 allocatable
= sym
->attr
.allocatable
;
7509 pointer
= sym
->attr
.pointer
;
7510 dimension
= sym
->attr
.dimension
;
7511 codimension
= sym
->attr
.codimension
;
7516 for (ref
= e
->ref
; ref
; ref2
= ref
, ref
= ref
->next
)
7521 if (ref
->u
.ar
.codimen
> 0)
7524 for (n
= ref
->u
.ar
.dimen
;
7525 n
< ref
->u
.ar
.dimen
+ ref
->u
.ar
.codimen
; n
++)
7526 if (ref
->u
.ar
.dimen_type
[n
] != DIMEN_THIS_IMAGE
)
7533 if (ref
->next
!= NULL
)
7541 gfc_error ("Coindexed allocatable object at %L",
7546 c
= ref
->u
.c
.component
;
7547 if (c
->ts
.type
== BT_CLASS
)
7549 allocatable
= CLASS_DATA (c
)->attr
.allocatable
;
7550 pointer
= CLASS_DATA (c
)->attr
.class_pointer
;
7551 dimension
= CLASS_DATA (c
)->attr
.dimension
;
7552 codimension
= CLASS_DATA (c
)->attr
.codimension
;
7553 is_abstract
= CLASS_DATA (c
)->attr
.abstract
;
7557 allocatable
= c
->attr
.allocatable
;
7558 pointer
= c
->attr
.pointer
;
7559 dimension
= c
->attr
.dimension
;
7560 codimension
= c
->attr
.codimension
;
7561 is_abstract
= c
->attr
.abstract
;
7574 /* Check for F08:C628. */
7575 if (allocatable
== 0 && pointer
== 0 && !unlimited
)
7577 gfc_error ("Allocate-object at %L must be ALLOCATABLE or a POINTER",
7582 /* Some checks for the SOURCE tag. */
7585 /* Check F03:C631. */
7586 if (!gfc_type_compatible (&e
->ts
, &code
->expr3
->ts
))
7588 gfc_error ("Type of entity at %L is type incompatible with "
7589 "source-expr at %L", &e
->where
, &code
->expr3
->where
);
7593 /* Check F03:C632 and restriction following Note 6.18. */
7594 if (code
->expr3
->rank
> 0 && !conformable_arrays (code
->expr3
, e
))
7597 /* Check F03:C633. */
7598 if (code
->expr3
->ts
.kind
!= e
->ts
.kind
&& !unlimited
)
7600 gfc_error ("The allocate-object at %L and the source-expr at %L "
7601 "shall have the same kind type parameter",
7602 &e
->where
, &code
->expr3
->where
);
7606 /* Check F2008, C642. */
7607 if (code
->expr3
->ts
.type
== BT_DERIVED
7608 && ((codimension
&& gfc_expr_attr (code
->expr3
).lock_comp
)
7609 || (code
->expr3
->ts
.u
.derived
->from_intmod
7610 == INTMOD_ISO_FORTRAN_ENV
7611 && code
->expr3
->ts
.u
.derived
->intmod_sym_id
7612 == ISOFORTRAN_LOCK_TYPE
)))
7614 gfc_error ("The source-expr at %L shall neither be of type "
7615 "LOCK_TYPE nor have a LOCK_TYPE component if "
7616 "allocate-object at %L is a coarray",
7617 &code
->expr3
->where
, &e
->where
);
7621 /* Check TS18508, C702/C703. */
7622 if (code
->expr3
->ts
.type
== BT_DERIVED
7623 && ((codimension
&& gfc_expr_attr (code
->expr3
).event_comp
)
7624 || (code
->expr3
->ts
.u
.derived
->from_intmod
7625 == INTMOD_ISO_FORTRAN_ENV
7626 && code
->expr3
->ts
.u
.derived
->intmod_sym_id
7627 == ISOFORTRAN_EVENT_TYPE
)))
7629 gfc_error ("The source-expr at %L shall neither be of type "
7630 "EVENT_TYPE nor have a EVENT_TYPE component if "
7631 "allocate-object at %L is a coarray",
7632 &code
->expr3
->where
, &e
->where
);
7637 /* Check F08:C629. */
7638 if (is_abstract
&& code
->ext
.alloc
.ts
.type
== BT_UNKNOWN
7641 gcc_assert (e
->ts
.type
== BT_CLASS
);
7642 gfc_error ("Allocating %s of ABSTRACT base type at %L requires a "
7643 "type-spec or source-expr", sym
->name
, &e
->where
);
7647 /* Check F08:C632. */
7648 if (code
->ext
.alloc
.ts
.type
== BT_CHARACTER
&& !e
->ts
.deferred
7649 && !UNLIMITED_POLY (e
))
7653 if (!e
->ts
.u
.cl
->length
)
7656 cmp
= gfc_dep_compare_expr (e
->ts
.u
.cl
->length
,
7657 code
->ext
.alloc
.ts
.u
.cl
->length
);
7658 if (cmp
== 1 || cmp
== -1 || cmp
== -3)
7660 gfc_error ("Allocating %s at %L with type-spec requires the same "
7661 "character-length parameter as in the declaration",
7662 sym
->name
, &e
->where
);
7667 /* In the variable definition context checks, gfc_expr_attr is used
7668 on the expression. This is fooled by the array specification
7669 present in e, thus we have to eliminate that one temporarily. */
7670 e2
= remove_last_array_ref (e
);
7673 t
= gfc_check_vardef_context (e2
, true, true, false,
7674 _("ALLOCATE object"));
7676 t
= gfc_check_vardef_context (e2
, false, true, false,
7677 _("ALLOCATE object"));
7682 if (e
->ts
.type
== BT_CLASS
&& CLASS_DATA (e
)->attr
.dimension
7683 && !code
->expr3
&& code
->ext
.alloc
.ts
.type
== BT_DERIVED
)
7685 /* For class arrays, the initialization with SOURCE is done
7686 using _copy and trans_call. It is convenient to exploit that
7687 when the allocated type is different from the declared type but
7688 no SOURCE exists by setting expr3. */
7689 code
->expr3
= gfc_default_initializer (&code
->ext
.alloc
.ts
);
7691 else if (flag_coarray
!= GFC_FCOARRAY_LIB
&& e
->ts
.type
== BT_DERIVED
7692 && e
->ts
.u
.derived
->from_intmod
== INTMOD_ISO_FORTRAN_ENV
7693 && e
->ts
.u
.derived
->intmod_sym_id
== ISOFORTRAN_EVENT_TYPE
)
7695 /* We have to zero initialize the integer variable. */
7696 code
->expr3
= gfc_get_int_expr (gfc_default_integer_kind
, &e
->where
, 0);
7699 if (e
->ts
.type
== BT_CLASS
&& !unlimited
&& !UNLIMITED_POLY (code
->expr3
))
7701 /* Make sure the vtab symbol is present when
7702 the module variables are generated. */
7703 gfc_typespec ts
= e
->ts
;
7705 ts
= code
->expr3
->ts
;
7706 else if (code
->ext
.alloc
.ts
.type
== BT_DERIVED
)
7707 ts
= code
->ext
.alloc
.ts
;
7709 /* Finding the vtab also publishes the type's symbol. Therefore this
7710 statement is necessary. */
7711 gfc_find_derived_vtab (ts
.u
.derived
);
7713 else if (unlimited
&& !UNLIMITED_POLY (code
->expr3
))
7715 /* Again, make sure the vtab symbol is present when
7716 the module variables are generated. */
7717 gfc_typespec
*ts
= NULL
;
7719 ts
= &code
->expr3
->ts
;
7721 ts
= &code
->ext
.alloc
.ts
;
7725 /* Finding the vtab also publishes the type's symbol. Therefore this
7726 statement is necessary. */
7730 if (dimension
== 0 && codimension
== 0)
7733 /* Make sure the last reference node is an array specification. */
7735 if (!ref2
|| ref2
->type
!= REF_ARRAY
|| ref2
->u
.ar
.type
== AR_FULL
7736 || (dimension
&& ref2
->u
.ar
.dimen
== 0))
7741 if (!gfc_notify_std (GFC_STD_F2008
, "Array specification required "
7742 "in ALLOCATE statement at %L", &e
->where
))
7744 if (code
->expr3
->rank
!= 0)
7745 *array_alloc_wo_spec
= true;
7748 gfc_error ("Array specification or array-valued SOURCE= "
7749 "expression required in ALLOCATE statement at %L",
7756 gfc_error ("Array specification required in ALLOCATE statement "
7757 "at %L", &e
->where
);
7762 /* Make sure that the array section reference makes sense in the
7763 context of an ALLOCATE specification. */
7768 for (i
= ar
->dimen
; i
< ar
->dimen
+ ar
->codimen
; i
++)
7769 if (ar
->dimen_type
[i
] == DIMEN_THIS_IMAGE
)
7771 gfc_error ("Coarray specification required in ALLOCATE statement "
7772 "at %L", &e
->where
);
7776 for (i
= 0; i
< ar
->dimen
; i
++)
7778 if (ar
->type
== AR_ELEMENT
|| ar
->type
== AR_FULL
)
7781 switch (ar
->dimen_type
[i
])
7787 if (ar
->start
[i
] != NULL
7788 && ar
->end
[i
] != NULL
7789 && ar
->stride
[i
] == NULL
)
7797 case DIMEN_THIS_IMAGE
:
7798 gfc_error ("Bad array specification in ALLOCATE statement at %L",
7804 for (a
= code
->ext
.alloc
.list
; a
; a
= a
->next
)
7806 sym
= a
->expr
->symtree
->n
.sym
;
7808 /* TODO - check derived type components. */
7809 if (gfc_bt_struct (sym
->ts
.type
) || sym
->ts
.type
== BT_CLASS
)
7812 if ((ar
->start
[i
] != NULL
7813 && gfc_find_sym_in_expr (sym
, ar
->start
[i
]))
7814 || (ar
->end
[i
] != NULL
7815 && gfc_find_sym_in_expr (sym
, ar
->end
[i
])))
7817 gfc_error ("%qs must not appear in the array specification at "
7818 "%L in the same ALLOCATE statement where it is "
7819 "itself allocated", sym
->name
, &ar
->where
);
7825 for (i
= ar
->dimen
; i
< ar
->codimen
+ ar
->dimen
; i
++)
7827 if (ar
->dimen_type
[i
] == DIMEN_ELEMENT
7828 || ar
->dimen_type
[i
] == DIMEN_RANGE
)
7830 if (i
== (ar
->dimen
+ ar
->codimen
- 1))
7832 gfc_error ("Expected '*' in coindex specification in ALLOCATE "
7833 "statement at %L", &e
->where
);
7839 if (ar
->dimen_type
[i
] == DIMEN_STAR
&& i
== (ar
->dimen
+ ar
->codimen
- 1)
7840 && ar
->stride
[i
] == NULL
)
7843 gfc_error ("Bad coarray specification in ALLOCATE statement at %L",
7857 resolve_allocate_deallocate (gfc_code
*code
, const char *fcn
)
7859 gfc_expr
*stat
, *errmsg
, *pe
, *qe
;
7860 gfc_alloc
*a
, *p
, *q
;
7863 errmsg
= code
->expr2
;
7865 /* Check the stat variable. */
7868 gfc_check_vardef_context (stat
, false, false, false,
7869 _("STAT variable"));
7871 if ((stat
->ts
.type
!= BT_INTEGER
7872 && !(stat
->ref
&& (stat
->ref
->type
== REF_ARRAY
7873 || stat
->ref
->type
== REF_COMPONENT
)))
7875 gfc_error ("Stat-variable at %L must be a scalar INTEGER "
7876 "variable", &stat
->where
);
7878 for (p
= code
->ext
.alloc
.list
; p
; p
= p
->next
)
7879 if (p
->expr
->symtree
->n
.sym
->name
== stat
->symtree
->n
.sym
->name
)
7881 gfc_ref
*ref1
, *ref2
;
7884 for (ref1
= p
->expr
->ref
, ref2
= stat
->ref
; ref1
&& ref2
;
7885 ref1
= ref1
->next
, ref2
= ref2
->next
)
7887 if (ref1
->type
!= REF_COMPONENT
|| ref2
->type
!= REF_COMPONENT
)
7889 if (ref1
->u
.c
.component
->name
!= ref2
->u
.c
.component
->name
)
7898 gfc_error ("Stat-variable at %L shall not be %sd within "
7899 "the same %s statement", &stat
->where
, fcn
, fcn
);
7905 /* Check the errmsg variable. */
7909 gfc_warning (0, "ERRMSG at %L is useless without a STAT tag",
7912 gfc_check_vardef_context (errmsg
, false, false, false,
7913 _("ERRMSG variable"));
7915 /* F18:R928 alloc-opt is ERRMSG = errmsg-variable
7916 F18:R930 errmsg-variable is scalar-default-char-variable
7917 F18:R906 default-char-variable is variable
7918 F18:C906 default-char-variable shall be default character. */
7919 if ((errmsg
->ts
.type
!= BT_CHARACTER
7921 && (errmsg
->ref
->type
== REF_ARRAY
7922 || errmsg
->ref
->type
== REF_COMPONENT
)))
7924 || errmsg
->ts
.kind
!= gfc_default_character_kind
)
7925 gfc_error ("ERRMSG variable at %L shall be a scalar default CHARACTER "
7926 "variable", &errmsg
->where
);
7928 for (p
= code
->ext
.alloc
.list
; p
; p
= p
->next
)
7929 if (p
->expr
->symtree
->n
.sym
->name
== errmsg
->symtree
->n
.sym
->name
)
7931 gfc_ref
*ref1
, *ref2
;
7934 for (ref1
= p
->expr
->ref
, ref2
= errmsg
->ref
; ref1
&& ref2
;
7935 ref1
= ref1
->next
, ref2
= ref2
->next
)
7937 if (ref1
->type
!= REF_COMPONENT
|| ref2
->type
!= REF_COMPONENT
)
7939 if (ref1
->u
.c
.component
->name
!= ref2
->u
.c
.component
->name
)
7948 gfc_error ("Errmsg-variable at %L shall not be %sd within "
7949 "the same %s statement", &errmsg
->where
, fcn
, fcn
);
7955 /* Check that an allocate-object appears only once in the statement. */
7957 for (p
= code
->ext
.alloc
.list
; p
; p
= p
->next
)
7960 for (q
= p
->next
; q
; q
= q
->next
)
7963 if (pe
->symtree
->n
.sym
->name
== qe
->symtree
->n
.sym
->name
)
7965 /* This is a potential collision. */
7966 gfc_ref
*pr
= pe
->ref
;
7967 gfc_ref
*qr
= qe
->ref
;
7969 /* Follow the references until
7970 a) They start to differ, in which case there is no error;
7971 you can deallocate a%b and a%c in a single statement
7972 b) Both of them stop, which is an error
7973 c) One of them stops, which is also an error. */
7976 if (pr
== NULL
&& qr
== NULL
)
7978 gfc_error ("Allocate-object at %L also appears at %L",
7979 &pe
->where
, &qe
->where
);
7982 else if (pr
!= NULL
&& qr
== NULL
)
7984 gfc_error ("Allocate-object at %L is subobject of"
7985 " object at %L", &pe
->where
, &qe
->where
);
7988 else if (pr
== NULL
&& qr
!= NULL
)
7990 gfc_error ("Allocate-object at %L is subobject of"
7991 " object at %L", &qe
->where
, &pe
->where
);
7994 /* Here, pr != NULL && qr != NULL */
7995 gcc_assert(pr
->type
== qr
->type
);
7996 if (pr
->type
== REF_ARRAY
)
7998 /* Handle cases like allocate(v(3)%x(3), v(2)%x(3)),
8000 gcc_assert (qr
->type
== REF_ARRAY
);
8002 if (pr
->next
&& qr
->next
)
8005 gfc_array_ref
*par
= &(pr
->u
.ar
);
8006 gfc_array_ref
*qar
= &(qr
->u
.ar
);
8008 for (i
=0; i
<par
->dimen
; i
++)
8010 if ((par
->start
[i
] != NULL
8011 || qar
->start
[i
] != NULL
)
8012 && gfc_dep_compare_expr (par
->start
[i
],
8013 qar
->start
[i
]) != 0)
8020 if (pr
->u
.c
.component
->name
!= qr
->u
.c
.component
->name
)
8033 if (strcmp (fcn
, "ALLOCATE") == 0)
8035 bool arr_alloc_wo_spec
= false;
8037 /* Resolving the expr3 in the loop over all objects to allocate would
8038 execute loop invariant code for each loop item. Therefore do it just
8040 if (code
->expr3
&& code
->expr3
->mold
8041 && code
->expr3
->ts
.type
== BT_DERIVED
)
8043 /* Default initialization via MOLD (non-polymorphic). */
8044 gfc_expr
*rhs
= gfc_default_initializer (&code
->expr3
->ts
);
8047 gfc_resolve_expr (rhs
);
8048 gfc_free_expr (code
->expr3
);
8052 for (a
= code
->ext
.alloc
.list
; a
; a
= a
->next
)
8053 resolve_allocate_expr (a
->expr
, code
, &arr_alloc_wo_spec
);
8055 if (arr_alloc_wo_spec
&& code
->expr3
)
8057 /* Mark the allocate to have to take the array specification
8059 code
->ext
.alloc
.arr_spec_from_expr3
= 1;
8064 for (a
= code
->ext
.alloc
.list
; a
; a
= a
->next
)
8065 resolve_deallocate_expr (a
->expr
);
8070 /************ SELECT CASE resolution subroutines ************/
8072 /* Callback function for our mergesort variant. Determines interval
8073 overlaps for CASEs. Return <0 if op1 < op2, 0 for overlap, >0 for
8074 op1 > op2. Assumes we're not dealing with the default case.
8075 We have op1 = (:L), (K:L) or (K:) and op2 = (:N), (M:N) or (M:).
8076 There are nine situations to check. */
8079 compare_cases (const gfc_case
*op1
, const gfc_case
*op2
)
8083 if (op1
->low
== NULL
) /* op1 = (:L) */
8085 /* op2 = (:N), so overlap. */
8087 /* op2 = (M:) or (M:N), L < M */
8088 if (op2
->low
!= NULL
8089 && gfc_compare_expr (op1
->high
, op2
->low
, INTRINSIC_LT
) < 0)
8092 else if (op1
->high
== NULL
) /* op1 = (K:) */
8094 /* op2 = (M:), so overlap. */
8096 /* op2 = (:N) or (M:N), K > N */
8097 if (op2
->high
!= NULL
8098 && gfc_compare_expr (op1
->low
, op2
->high
, INTRINSIC_GT
) > 0)
8101 else /* op1 = (K:L) */
8103 if (op2
->low
== NULL
) /* op2 = (:N), K > N */
8104 retval
= (gfc_compare_expr (op1
->low
, op2
->high
, INTRINSIC_GT
) > 0)
8106 else if (op2
->high
== NULL
) /* op2 = (M:), L < M */
8107 retval
= (gfc_compare_expr (op1
->high
, op2
->low
, INTRINSIC_LT
) < 0)
8109 else /* op2 = (M:N) */
8113 if (gfc_compare_expr (op1
->high
, op2
->low
, INTRINSIC_LT
) < 0)
8116 else if (gfc_compare_expr (op1
->low
, op2
->high
, INTRINSIC_GT
) > 0)
8125 /* Merge-sort a double linked case list, detecting overlap in the
8126 process. LIST is the head of the double linked case list before it
8127 is sorted. Returns the head of the sorted list if we don't see any
8128 overlap, or NULL otherwise. */
8131 check_case_overlap (gfc_case
*list
)
8133 gfc_case
*p
, *q
, *e
, *tail
;
8134 int insize
, nmerges
, psize
, qsize
, cmp
, overlap_seen
;
8136 /* If the passed list was empty, return immediately. */
8143 /* Loop unconditionally. The only exit from this loop is a return
8144 statement, when we've finished sorting the case list. */
8151 /* Count the number of merges we do in this pass. */
8154 /* Loop while there exists a merge to be done. */
8159 /* Count this merge. */
8162 /* Cut the list in two pieces by stepping INSIZE places
8163 forward in the list, starting from P. */
8166 for (i
= 0; i
< insize
; i
++)
8175 /* Now we have two lists. Merge them! */
8176 while (psize
> 0 || (qsize
> 0 && q
!= NULL
))
8178 /* See from which the next case to merge comes from. */
8181 /* P is empty so the next case must come from Q. */
8186 else if (qsize
== 0 || q
== NULL
)
8195 cmp
= compare_cases (p
, q
);
8198 /* The whole case range for P is less than the
8206 /* The whole case range for Q is greater than
8207 the case range for P. */
8214 /* The cases overlap, or they are the same
8215 element in the list. Either way, we must
8216 issue an error and get the next case from P. */
8217 /* FIXME: Sort P and Q by line number. */
8218 gfc_error ("CASE label at %L overlaps with CASE "
8219 "label at %L", &p
->where
, &q
->where
);
8227 /* Add the next element to the merged list. */
8236 /* P has now stepped INSIZE places along, and so has Q. So
8237 they're the same. */
8242 /* If we have done only one merge or none at all, we've
8243 finished sorting the cases. */
8252 /* Otherwise repeat, merging lists twice the size. */
8258 /* Check to see if an expression is suitable for use in a CASE statement.
8259 Makes sure that all case expressions are scalar constants of the same
8260 type. Return false if anything is wrong. */
8263 validate_case_label_expr (gfc_expr
*e
, gfc_expr
*case_expr
)
8265 if (e
== NULL
) return true;
8267 if (e
->ts
.type
!= case_expr
->ts
.type
)
8269 gfc_error ("Expression in CASE statement at %L must be of type %s",
8270 &e
->where
, gfc_basic_typename (case_expr
->ts
.type
));
8274 /* C805 (R808) For a given case-construct, each case-value shall be of
8275 the same type as case-expr. For character type, length differences
8276 are allowed, but the kind type parameters shall be the same. */
8278 if (case_expr
->ts
.type
== BT_CHARACTER
&& e
->ts
.kind
!= case_expr
->ts
.kind
)
8280 gfc_error ("Expression in CASE statement at %L must be of kind %d",
8281 &e
->where
, case_expr
->ts
.kind
);
8285 /* Convert the case value kind to that of case expression kind,
8288 if (e
->ts
.kind
!= case_expr
->ts
.kind
)
8289 gfc_convert_type_warn (e
, &case_expr
->ts
, 2, 0);
8293 gfc_error ("Expression in CASE statement at %L must be scalar",
8302 /* Given a completely parsed select statement, we:
8304 - Validate all expressions and code within the SELECT.
8305 - Make sure that the selection expression is not of the wrong type.
8306 - Make sure that no case ranges overlap.
8307 - Eliminate unreachable cases and unreachable code resulting from
8308 removing case labels.
8310 The standard does allow unreachable cases, e.g. CASE (5:3). But
8311 they are a hassle for code generation, and to prevent that, we just
8312 cut them out here. This is not necessary for overlapping cases
8313 because they are illegal and we never even try to generate code.
8315 We have the additional caveat that a SELECT construct could have
8316 been a computed GOTO in the source code. Fortunately we can fairly
8317 easily work around that here: The case_expr for a "real" SELECT CASE
8318 is in code->expr1, but for a computed GOTO it is in code->expr2. All
8319 we have to do is make sure that the case_expr is a scalar integer
8323 resolve_select (gfc_code
*code
, bool select_type
)
8326 gfc_expr
*case_expr
;
8327 gfc_case
*cp
, *default_case
, *tail
, *head
;
8328 int seen_unreachable
;
8334 if (code
->expr1
== NULL
)
8336 /* This was actually a computed GOTO statement. */
8337 case_expr
= code
->expr2
;
8338 if (case_expr
->ts
.type
!= BT_INTEGER
|| case_expr
->rank
!= 0)
8339 gfc_error ("Selection expression in computed GOTO statement "
8340 "at %L must be a scalar integer expression",
8343 /* Further checking is not necessary because this SELECT was built
8344 by the compiler, so it should always be OK. Just move the
8345 case_expr from expr2 to expr so that we can handle computed
8346 GOTOs as normal SELECTs from here on. */
8347 code
->expr1
= code
->expr2
;
8352 case_expr
= code
->expr1
;
8353 type
= case_expr
->ts
.type
;
8356 if (type
!= BT_LOGICAL
&& type
!= BT_INTEGER
&& type
!= BT_CHARACTER
)
8358 gfc_error ("Argument of SELECT statement at %L cannot be %s",
8359 &case_expr
->where
, gfc_typename (&case_expr
->ts
));
8361 /* Punt. Going on here just produce more garbage error messages. */
8366 if (!select_type
&& case_expr
->rank
!= 0)
8368 gfc_error ("Argument of SELECT statement at %L must be a scalar "
8369 "expression", &case_expr
->where
);
8375 /* Raise a warning if an INTEGER case value exceeds the range of
8376 the case-expr. Later, all expressions will be promoted to the
8377 largest kind of all case-labels. */
8379 if (type
== BT_INTEGER
)
8380 for (body
= code
->block
; body
; body
= body
->block
)
8381 for (cp
= body
->ext
.block
.case_list
; cp
; cp
= cp
->next
)
8384 && gfc_check_integer_range (cp
->low
->value
.integer
,
8385 case_expr
->ts
.kind
) != ARITH_OK
)
8386 gfc_warning (0, "Expression in CASE statement at %L is "
8387 "not in the range of %s", &cp
->low
->where
,
8388 gfc_typename (&case_expr
->ts
));
8391 && cp
->low
!= cp
->high
8392 && gfc_check_integer_range (cp
->high
->value
.integer
,
8393 case_expr
->ts
.kind
) != ARITH_OK
)
8394 gfc_warning (0, "Expression in CASE statement at %L is "
8395 "not in the range of %s", &cp
->high
->where
,
8396 gfc_typename (&case_expr
->ts
));
8399 /* PR 19168 has a long discussion concerning a mismatch of the kinds
8400 of the SELECT CASE expression and its CASE values. Walk the lists
8401 of case values, and if we find a mismatch, promote case_expr to
8402 the appropriate kind. */
8404 if (type
== BT_LOGICAL
|| type
== BT_INTEGER
)
8406 for (body
= code
->block
; body
; body
= body
->block
)
8408 /* Walk the case label list. */
8409 for (cp
= body
->ext
.block
.case_list
; cp
; cp
= cp
->next
)
8411 /* Intercept the DEFAULT case. It does not have a kind. */
8412 if (cp
->low
== NULL
&& cp
->high
== NULL
)
8415 /* Unreachable case ranges are discarded, so ignore. */
8416 if (cp
->low
!= NULL
&& cp
->high
!= NULL
8417 && cp
->low
!= cp
->high
8418 && gfc_compare_expr (cp
->low
, cp
->high
, INTRINSIC_GT
) > 0)
8422 && case_expr
->ts
.kind
!= gfc_kind_max(case_expr
, cp
->low
))
8423 gfc_convert_type_warn (case_expr
, &cp
->low
->ts
, 2, 0);
8425 if (cp
->high
!= NULL
8426 && case_expr
->ts
.kind
!= gfc_kind_max(case_expr
, cp
->high
))
8427 gfc_convert_type_warn (case_expr
, &cp
->high
->ts
, 2, 0);
8432 /* Assume there is no DEFAULT case. */
8433 default_case
= NULL
;
8438 for (body
= code
->block
; body
; body
= body
->block
)
8440 /* Assume the CASE list is OK, and all CASE labels can be matched. */
8442 seen_unreachable
= 0;
8444 /* Walk the case label list, making sure that all case labels
8446 for (cp
= body
->ext
.block
.case_list
; cp
; cp
= cp
->next
)
8448 /* Count the number of cases in the whole construct. */
8451 /* Intercept the DEFAULT case. */
8452 if (cp
->low
== NULL
&& cp
->high
== NULL
)
8454 if (default_case
!= NULL
)
8456 gfc_error ("The DEFAULT CASE at %L cannot be followed "
8457 "by a second DEFAULT CASE at %L",
8458 &default_case
->where
, &cp
->where
);
8469 /* Deal with single value cases and case ranges. Errors are
8470 issued from the validation function. */
8471 if (!validate_case_label_expr (cp
->low
, case_expr
)
8472 || !validate_case_label_expr (cp
->high
, case_expr
))
8478 if (type
== BT_LOGICAL
8479 && ((cp
->low
== NULL
|| cp
->high
== NULL
)
8480 || cp
->low
!= cp
->high
))
8482 gfc_error ("Logical range in CASE statement at %L is not "
8483 "allowed", &cp
->low
->where
);
8488 if (type
== BT_LOGICAL
&& cp
->low
->expr_type
== EXPR_CONSTANT
)
8491 value
= cp
->low
->value
.logical
== 0 ? 2 : 1;
8492 if (value
& seen_logical
)
8494 gfc_error ("Constant logical value in CASE statement "
8495 "is repeated at %L",
8500 seen_logical
|= value
;
8503 if (cp
->low
!= NULL
&& cp
->high
!= NULL
8504 && cp
->low
!= cp
->high
8505 && gfc_compare_expr (cp
->low
, cp
->high
, INTRINSIC_GT
) > 0)
8507 if (warn_surprising
)
8508 gfc_warning (OPT_Wsurprising
,
8509 "Range specification at %L can never be matched",
8512 cp
->unreachable
= 1;
8513 seen_unreachable
= 1;
8517 /* If the case range can be matched, it can also overlap with
8518 other cases. To make sure it does not, we put it in a
8519 double linked list here. We sort that with a merge sort
8520 later on to detect any overlapping cases. */
8524 head
->right
= head
->left
= NULL
;
8529 tail
->right
->left
= tail
;
8536 /* It there was a failure in the previous case label, give up
8537 for this case label list. Continue with the next block. */
8541 /* See if any case labels that are unreachable have been seen.
8542 If so, we eliminate them. This is a bit of a kludge because
8543 the case lists for a single case statement (label) is a
8544 single forward linked lists. */
8545 if (seen_unreachable
)
8547 /* Advance until the first case in the list is reachable. */
8548 while (body
->ext
.block
.case_list
!= NULL
8549 && body
->ext
.block
.case_list
->unreachable
)
8551 gfc_case
*n
= body
->ext
.block
.case_list
;
8552 body
->ext
.block
.case_list
= body
->ext
.block
.case_list
->next
;
8554 gfc_free_case_list (n
);
8557 /* Strip all other unreachable cases. */
8558 if (body
->ext
.block
.case_list
)
8560 for (cp
= body
->ext
.block
.case_list
; cp
&& cp
->next
; cp
= cp
->next
)
8562 if (cp
->next
->unreachable
)
8564 gfc_case
*n
= cp
->next
;
8565 cp
->next
= cp
->next
->next
;
8567 gfc_free_case_list (n
);
8574 /* See if there were overlapping cases. If the check returns NULL,
8575 there was overlap. In that case we don't do anything. If head
8576 is non-NULL, we prepend the DEFAULT case. The sorted list can
8577 then used during code generation for SELECT CASE constructs with
8578 a case expression of a CHARACTER type. */
8581 head
= check_case_overlap (head
);
8583 /* Prepend the default_case if it is there. */
8584 if (head
!= NULL
&& default_case
)
8586 default_case
->left
= NULL
;
8587 default_case
->right
= head
;
8588 head
->left
= default_case
;
8592 /* Eliminate dead blocks that may be the result if we've seen
8593 unreachable case labels for a block. */
8594 for (body
= code
; body
&& body
->block
; body
= body
->block
)
8596 if (body
->block
->ext
.block
.case_list
== NULL
)
8598 /* Cut the unreachable block from the code chain. */
8599 gfc_code
*c
= body
->block
;
8600 body
->block
= c
->block
;
8602 /* Kill the dead block, but not the blocks below it. */
8604 gfc_free_statements (c
);
8608 /* More than two cases is legal but insane for logical selects.
8609 Issue a warning for it. */
8610 if (warn_surprising
&& type
== BT_LOGICAL
&& ncases
> 2)
8611 gfc_warning (OPT_Wsurprising
,
8612 "Logical SELECT CASE block at %L has more that two cases",
8617 /* Check if a derived type is extensible. */
8620 gfc_type_is_extensible (gfc_symbol
*sym
)
8622 return !(sym
->attr
.is_bind_c
|| sym
->attr
.sequence
8623 || (sym
->attr
.is_class
8624 && sym
->components
->ts
.u
.derived
->attr
.unlimited_polymorphic
));
8629 resolve_types (gfc_namespace
*ns
);
8631 /* Resolve an associate-name: Resolve target and ensure the type-spec is
8632 correct as well as possibly the array-spec. */
8635 resolve_assoc_var (gfc_symbol
* sym
, bool resolve_target
)
8639 gcc_assert (sym
->assoc
);
8640 gcc_assert (sym
->attr
.flavor
== FL_VARIABLE
);
8642 /* If this is for SELECT TYPE, the target may not yet be set. In that
8643 case, return. Resolution will be called later manually again when
8645 target
= sym
->assoc
->target
;
8648 gcc_assert (!sym
->assoc
->dangling
);
8650 if (resolve_target
&& !gfc_resolve_expr (target
))
8653 /* For variable targets, we get some attributes from the target. */
8654 if (target
->expr_type
== EXPR_VARIABLE
)
8658 gcc_assert (target
->symtree
);
8659 tsym
= target
->symtree
->n
.sym
;
8661 sym
->attr
.asynchronous
= tsym
->attr
.asynchronous
;
8662 sym
->attr
.volatile_
= tsym
->attr
.volatile_
;
8664 sym
->attr
.target
= tsym
->attr
.target
8665 || gfc_expr_attr (target
).pointer
;
8666 if (is_subref_array (target
))
8667 sym
->attr
.subref_array_pointer
= 1;
8670 if (target
->expr_type
== EXPR_NULL
)
8672 gfc_error ("Selector at %L cannot be NULL()", &target
->where
);
8675 else if (target
->ts
.type
== BT_UNKNOWN
)
8677 gfc_error ("Selector at %L has no type", &target
->where
);
8681 /* Get type if this was not already set. Note that it can be
8682 some other type than the target in case this is a SELECT TYPE
8683 selector! So we must not update when the type is already there. */
8684 if (sym
->ts
.type
== BT_UNKNOWN
)
8685 sym
->ts
= target
->ts
;
8687 gcc_assert (sym
->ts
.type
!= BT_UNKNOWN
);
8689 /* See if this is a valid association-to-variable. */
8690 sym
->assoc
->variable
= (target
->expr_type
== EXPR_VARIABLE
8691 && !gfc_has_vector_subscript (target
));
8693 /* Finally resolve if this is an array or not. */
8694 if (sym
->attr
.dimension
&& target
->rank
== 0)
8696 /* primary.c makes the assumption that a reference to an associate
8697 name followed by a left parenthesis is an array reference. */
8698 if (sym
->ts
.type
!= BT_CHARACTER
)
8699 gfc_error ("Associate-name %qs at %L is used as array",
8700 sym
->name
, &sym
->declared_at
);
8701 sym
->attr
.dimension
= 0;
8706 /* We cannot deal with class selectors that need temporaries. */
8707 if (target
->ts
.type
== BT_CLASS
8708 && gfc_ref_needs_temporary_p (target
->ref
))
8710 gfc_error ("CLASS selector at %L needs a temporary which is not "
8711 "yet implemented", &target
->where
);
8715 if (target
->ts
.type
== BT_CLASS
)
8716 gfc_fix_class_refs (target
);
8718 if (target
->rank
!= 0)
8721 /* The rank may be incorrectly guessed at parsing, therefore make sure
8722 it is corrected now. */
8723 if (sym
->ts
.type
!= BT_CLASS
&& (!sym
->as
|| sym
->assoc
->rankguessed
))
8726 sym
->as
= gfc_get_array_spec ();
8728 as
->rank
= target
->rank
;
8729 as
->type
= AS_DEFERRED
;
8730 as
->corank
= gfc_get_corank (target
);
8731 sym
->attr
.dimension
= 1;
8732 if (as
->corank
!= 0)
8733 sym
->attr
.codimension
= 1;
8735 else if (sym
->ts
.type
== BT_CLASS
&& (!CLASS_DATA (sym
)->as
|| sym
->assoc
->rankguessed
))
8737 if (!CLASS_DATA (sym
)->as
)
8738 CLASS_DATA (sym
)->as
= gfc_get_array_spec ();
8739 as
= CLASS_DATA (sym
)->as
;
8740 as
->rank
= target
->rank
;
8741 as
->type
= AS_DEFERRED
;
8742 as
->corank
= gfc_get_corank (target
);
8743 CLASS_DATA (sym
)->attr
.dimension
= 1;
8744 if (as
->corank
!= 0)
8745 CLASS_DATA (sym
)->attr
.codimension
= 1;
8750 /* target's rank is 0, but the type of the sym is still array valued,
8751 which has to be corrected. */
8752 if (sym
->ts
.type
== BT_CLASS
8753 && CLASS_DATA (sym
) && CLASS_DATA (sym
)->as
)
8756 symbol_attribute attr
;
8757 /* The associated variable's type is still the array type
8758 correct this now. */
8759 gfc_typespec
*ts
= &target
->ts
;
8762 for (ref
= target
->ref
; ref
!= NULL
; ref
= ref
->next
)
8767 ts
= &ref
->u
.c
.component
->ts
;
8770 if (ts
->type
== BT_CLASS
)
8771 ts
= &ts
->u
.derived
->components
->ts
;
8777 /* Create a scalar instance of the current class type. Because the
8778 rank of a class array goes into its name, the type has to be
8779 rebuild. The alternative of (re-)setting just the attributes
8780 and as in the current type, destroys the type also in other
8784 sym
->ts
.type
= BT_CLASS
;
8785 attr
= CLASS_DATA (sym
)->attr
;
8787 attr
.associate_var
= 1;
8788 attr
.dimension
= attr
.codimension
= 0;
8789 attr
.class_pointer
= 1;
8790 if (!gfc_build_class_symbol (&sym
->ts
, &attr
, &as
))
8792 /* Make sure the _vptr is set. */
8793 c
= gfc_find_component (sym
->ts
.u
.derived
, "_vptr", true, true, NULL
);
8794 if (c
->ts
.u
.derived
== NULL
)
8795 c
->ts
.u
.derived
= gfc_find_derived_vtab (sym
->ts
.u
.derived
);
8796 CLASS_DATA (sym
)->attr
.pointer
= 1;
8797 CLASS_DATA (sym
)->attr
.class_pointer
= 1;
8798 gfc_set_sym_referenced (sym
->ts
.u
.derived
);
8799 gfc_commit_symbol (sym
->ts
.u
.derived
);
8800 /* _vptr now has the _vtab in it, change it to the _vtype. */
8801 if (c
->ts
.u
.derived
->attr
.vtab
)
8802 c
->ts
.u
.derived
= c
->ts
.u
.derived
->ts
.u
.derived
;
8803 c
->ts
.u
.derived
->ns
->types_resolved
= 0;
8804 resolve_types (c
->ts
.u
.derived
->ns
);
8808 /* Mark this as an associate variable. */
8809 sym
->attr
.associate_var
= 1;
8811 /* Fix up the type-spec for CHARACTER types. */
8812 if (sym
->ts
.type
== BT_CHARACTER
&& !sym
->attr
.select_type_temporary
)
8815 sym
->ts
.u
.cl
= target
->ts
.u
.cl
;
8817 if (sym
->ts
.deferred
&& target
->expr_type
== EXPR_VARIABLE
8818 && target
->symtree
->n
.sym
->attr
.dummy
8819 && sym
->ts
.u
.cl
== target
->ts
.u
.cl
)
8821 sym
->ts
.u
.cl
= gfc_new_charlen (sym
->ns
, NULL
);
8822 sym
->ts
.deferred
= 1;
8825 if (!sym
->ts
.u
.cl
->length
8826 && !sym
->ts
.deferred
8827 && target
->expr_type
== EXPR_CONSTANT
)
8829 sym
->ts
.u
.cl
->length
=
8830 gfc_get_int_expr (gfc_charlen_int_kind
, NULL
,
8831 target
->value
.character
.length
);
8833 else if ((!sym
->ts
.u
.cl
->length
8834 || sym
->ts
.u
.cl
->length
->expr_type
!= EXPR_CONSTANT
)
8835 && target
->expr_type
!= EXPR_VARIABLE
)
8837 sym
->ts
.u
.cl
= gfc_new_charlen (sym
->ns
, NULL
);
8838 sym
->ts
.deferred
= 1;
8840 /* This is reset in trans-stmt.c after the assignment
8841 of the target expression to the associate name. */
8842 sym
->attr
.allocatable
= 1;
8846 /* If the target is a good class object, so is the associate variable. */
8847 if (sym
->ts
.type
== BT_CLASS
&& gfc_expr_attr (target
).class_ok
)
8848 sym
->attr
.class_ok
= 1;
8852 /* Ensure that SELECT TYPE expressions have the correct rank and a full
8853 array reference, where necessary. The symbols are artificial and so
8854 the dimension attribute and arrayspec can also be set. In addition,
8855 sometimes the expr1 arrives as BT_DERIVED, when the symbol is BT_CLASS.
8856 This is corrected here as well.*/
8859 fixup_array_ref (gfc_expr
**expr1
, gfc_expr
*expr2
,
8860 int rank
, gfc_ref
*ref
)
8862 gfc_ref
*nref
= (*expr1
)->ref
;
8863 gfc_symbol
*sym1
= (*expr1
)->symtree
->n
.sym
;
8864 gfc_symbol
*sym2
= expr2
? expr2
->symtree
->n
.sym
: NULL
;
8865 (*expr1
)->rank
= rank
;
8866 if (sym1
->ts
.type
== BT_CLASS
)
8868 if ((*expr1
)->ts
.type
!= BT_CLASS
)
8869 (*expr1
)->ts
= sym1
->ts
;
8871 CLASS_DATA (sym1
)->attr
.dimension
= 1;
8872 if (CLASS_DATA (sym1
)->as
== NULL
&& sym2
)
8873 CLASS_DATA (sym1
)->as
8874 = gfc_copy_array_spec (CLASS_DATA (sym2
)->as
);
8878 sym1
->attr
.dimension
= 1;
8879 if (sym1
->as
== NULL
&& sym2
)
8880 sym1
->as
= gfc_copy_array_spec (sym2
->as
);
8883 for (; nref
; nref
= nref
->next
)
8884 if (nref
->next
== NULL
)
8887 if (ref
&& nref
&& nref
->type
!= REF_ARRAY
)
8888 nref
->next
= gfc_copy_ref (ref
);
8889 else if (ref
&& !nref
)
8890 (*expr1
)->ref
= gfc_copy_ref (ref
);
8895 build_loc_call (gfc_expr
*sym_expr
)
8898 loc_call
= gfc_get_expr ();
8899 loc_call
->expr_type
= EXPR_FUNCTION
;
8900 gfc_get_sym_tree ("_loc", gfc_current_ns
, &loc_call
->symtree
, false);
8901 loc_call
->symtree
->n
.sym
->attr
.flavor
= FL_PROCEDURE
;
8902 loc_call
->symtree
->n
.sym
->attr
.intrinsic
= 1;
8903 loc_call
->symtree
->n
.sym
->result
= loc_call
->symtree
->n
.sym
;
8904 gfc_commit_symbol (loc_call
->symtree
->n
.sym
);
8905 loc_call
->ts
.type
= BT_INTEGER
;
8906 loc_call
->ts
.kind
= gfc_index_integer_kind
;
8907 loc_call
->value
.function
.isym
= gfc_intrinsic_function_by_id (GFC_ISYM_LOC
);
8908 loc_call
->value
.function
.actual
= gfc_get_actual_arglist ();
8909 loc_call
->value
.function
.actual
->expr
= sym_expr
;
8910 loc_call
->where
= sym_expr
->where
;
8914 /* Resolve a SELECT TYPE statement. */
8917 resolve_select_type (gfc_code
*code
, gfc_namespace
*old_ns
)
8919 gfc_symbol
*selector_type
;
8920 gfc_code
*body
, *new_st
, *if_st
, *tail
;
8921 gfc_code
*class_is
= NULL
, *default_case
= NULL
;
8924 char name
[GFC_MAX_SYMBOL_LEN
];
8928 gfc_ref
* ref
= NULL
;
8929 gfc_expr
*selector_expr
= NULL
;
8931 ns
= code
->ext
.block
.ns
;
8934 /* Check for F03:C813. */
8935 if (code
->expr1
->ts
.type
!= BT_CLASS
8936 && !(code
->expr2
&& code
->expr2
->ts
.type
== BT_CLASS
))
8938 gfc_error ("Selector shall be polymorphic in SELECT TYPE statement "
8939 "at %L", &code
->loc
);
8943 if (!code
->expr1
->symtree
->n
.sym
->attr
.class_ok
)
8948 gfc_ref
*ref2
= NULL
;
8949 for (ref
= code
->expr2
->ref
; ref
!= NULL
; ref
= ref
->next
)
8950 if (ref
->type
== REF_COMPONENT
8951 && ref
->u
.c
.component
->ts
.type
== BT_CLASS
)
8956 if (code
->expr1
->symtree
->n
.sym
->attr
.untyped
)
8957 code
->expr1
->symtree
->n
.sym
->ts
= ref2
->u
.c
.component
->ts
;
8958 selector_type
= CLASS_DATA (ref2
->u
.c
.component
)->ts
.u
.derived
;
8962 if (code
->expr1
->symtree
->n
.sym
->attr
.untyped
)
8963 code
->expr1
->symtree
->n
.sym
->ts
= code
->expr2
->ts
;
8964 selector_type
= CLASS_DATA (code
->expr2
)->ts
.u
.derived
;
8967 if (code
->expr2
->rank
&& CLASS_DATA (code
->expr1
)->as
)
8968 CLASS_DATA (code
->expr1
)->as
->rank
= code
->expr2
->rank
;
8970 /* F2008: C803 The selector expression must not be coindexed. */
8971 if (gfc_is_coindexed (code
->expr2
))
8973 gfc_error ("Selector at %L must not be coindexed",
8974 &code
->expr2
->where
);
8981 selector_type
= CLASS_DATA (code
->expr1
)->ts
.u
.derived
;
8983 if (gfc_is_coindexed (code
->expr1
))
8985 gfc_error ("Selector at %L must not be coindexed",
8986 &code
->expr1
->where
);
8991 /* Loop over TYPE IS / CLASS IS cases. */
8992 for (body
= code
->block
; body
; body
= body
->block
)
8994 c
= body
->ext
.block
.case_list
;
8998 /* Check for repeated cases. */
8999 for (tail
= code
->block
; tail
; tail
= tail
->block
)
9001 gfc_case
*d
= tail
->ext
.block
.case_list
;
9005 if (c
->ts
.type
== d
->ts
.type
9006 && ((c
->ts
.type
== BT_DERIVED
9007 && c
->ts
.u
.derived
&& d
->ts
.u
.derived
9008 && !strcmp (c
->ts
.u
.derived
->name
,
9009 d
->ts
.u
.derived
->name
))
9010 || c
->ts
.type
== BT_UNKNOWN
9011 || (!(c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
9012 && c
->ts
.kind
== d
->ts
.kind
)))
9014 gfc_error ("TYPE IS at %L overlaps with TYPE IS at %L",
9015 &c
->where
, &d
->where
);
9021 /* Check F03:C815. */
9022 if ((c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
9023 && !selector_type
->attr
.unlimited_polymorphic
9024 && !gfc_type_is_extensible (c
->ts
.u
.derived
))
9026 gfc_error ("Derived type %qs at %L must be extensible",
9027 c
->ts
.u
.derived
->name
, &c
->where
);
9032 /* Check F03:C816. */
9033 if (c
->ts
.type
!= BT_UNKNOWN
&& !selector_type
->attr
.unlimited_polymorphic
9034 && ((c
->ts
.type
!= BT_DERIVED
&& c
->ts
.type
!= BT_CLASS
)
9035 || !gfc_type_is_extension_of (selector_type
, c
->ts
.u
.derived
)))
9037 if (c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
9038 gfc_error ("Derived type %qs at %L must be an extension of %qs",
9039 c
->ts
.u
.derived
->name
, &c
->where
, selector_type
->name
);
9041 gfc_error ("Unexpected intrinsic type %qs at %L",
9042 gfc_basic_typename (c
->ts
.type
), &c
->where
);
9047 /* Check F03:C814. */
9048 if (c
->ts
.type
== BT_CHARACTER
9049 && (c
->ts
.u
.cl
->length
!= NULL
|| c
->ts
.deferred
))
9051 gfc_error ("The type-spec at %L shall specify that each length "
9052 "type parameter is assumed", &c
->where
);
9057 /* Intercept the DEFAULT case. */
9058 if (c
->ts
.type
== BT_UNKNOWN
)
9060 /* Check F03:C818. */
9063 gfc_error ("The DEFAULT CASE at %L cannot be followed "
9064 "by a second DEFAULT CASE at %L",
9065 &default_case
->ext
.block
.case_list
->where
, &c
->where
);
9070 default_case
= body
;
9077 /* Transform SELECT TYPE statement to BLOCK and associate selector to
9078 target if present. If there are any EXIT statements referring to the
9079 SELECT TYPE construct, this is no problem because the gfc_code
9080 reference stays the same and EXIT is equally possible from the BLOCK
9081 it is changed to. */
9082 code
->op
= EXEC_BLOCK
;
9085 gfc_association_list
* assoc
;
9087 assoc
= gfc_get_association_list ();
9088 assoc
->st
= code
->expr1
->symtree
;
9089 assoc
->target
= gfc_copy_expr (code
->expr2
);
9090 assoc
->target
->where
= code
->expr2
->where
;
9091 /* assoc->variable will be set by resolve_assoc_var. */
9093 code
->ext
.block
.assoc
= assoc
;
9094 code
->expr1
->symtree
->n
.sym
->assoc
= assoc
;
9096 resolve_assoc_var (code
->expr1
->symtree
->n
.sym
, false);
9099 code
->ext
.block
.assoc
= NULL
;
9101 /* Ensure that the selector rank and arrayspec are available to
9102 correct expressions in which they might be missing. */
9103 if (code
->expr2
&& code
->expr2
->rank
)
9105 rank
= code
->expr2
->rank
;
9106 for (ref
= code
->expr2
->ref
; ref
; ref
= ref
->next
)
9107 if (ref
->next
== NULL
)
9109 if (ref
&& ref
->type
== REF_ARRAY
)
9110 ref
= gfc_copy_ref (ref
);
9112 /* Fixup expr1 if necessary. */
9114 fixup_array_ref (&code
->expr1
, code
->expr2
, rank
, ref
);
9116 else if (code
->expr1
->rank
)
9118 rank
= code
->expr1
->rank
;
9119 for (ref
= code
->expr1
->ref
; ref
; ref
= ref
->next
)
9120 if (ref
->next
== NULL
)
9122 if (ref
&& ref
->type
== REF_ARRAY
)
9123 ref
= gfc_copy_ref (ref
);
9126 /* Add EXEC_SELECT to switch on type. */
9127 new_st
= gfc_get_code (code
->op
);
9128 new_st
->expr1
= code
->expr1
;
9129 new_st
->expr2
= code
->expr2
;
9130 new_st
->block
= code
->block
;
9131 code
->expr1
= code
->expr2
= NULL
;
9136 ns
->code
->next
= new_st
;
9138 code
->op
= EXEC_SELECT_TYPE
;
9140 /* Use the intrinsic LOC function to generate an integer expression
9141 for the vtable of the selector. Note that the rank of the selector
9142 expression has to be set to zero. */
9143 gfc_add_vptr_component (code
->expr1
);
9144 code
->expr1
->rank
= 0;
9145 code
->expr1
= build_loc_call (code
->expr1
);
9146 selector_expr
= code
->expr1
->value
.function
.actual
->expr
;
9148 /* Loop over TYPE IS / CLASS IS cases. */
9149 for (body
= code
->block
; body
; body
= body
->block
)
9153 c
= body
->ext
.block
.case_list
;
9155 /* Generate an index integer expression for address of the
9156 TYPE/CLASS vtable and store it in c->low. The hash expression
9157 is stored in c->high and is used to resolve intrinsic cases. */
9158 if (c
->ts
.type
!= BT_UNKNOWN
)
9160 if (c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
9162 vtab
= gfc_find_derived_vtab (c
->ts
.u
.derived
);
9164 c
->high
= gfc_get_int_expr (gfc_integer_4_kind
, NULL
,
9165 c
->ts
.u
.derived
->hash_value
);
9169 vtab
= gfc_find_vtab (&c
->ts
);
9170 gcc_assert (vtab
&& CLASS_DATA (vtab
)->initializer
);
9171 e
= CLASS_DATA (vtab
)->initializer
;
9172 c
->high
= gfc_copy_expr (e
);
9173 if (c
->high
->ts
.kind
!= gfc_integer_4_kind
)
9176 ts
.kind
= gfc_integer_4_kind
;
9177 ts
.type
= BT_INTEGER
;
9178 gfc_convert_type_warn (c
->high
, &ts
, 2, 0);
9182 e
= gfc_lval_expr_from_sym (vtab
);
9183 c
->low
= build_loc_call (e
);
9188 /* Associate temporary to selector. This should only be done
9189 when this case is actually true, so build a new ASSOCIATE
9190 that does precisely this here (instead of using the
9193 if (c
->ts
.type
== BT_CLASS
)
9194 sprintf (name
, "__tmp_class_%s", c
->ts
.u
.derived
->name
);
9195 else if (c
->ts
.type
== BT_DERIVED
)
9196 sprintf (name
, "__tmp_type_%s", c
->ts
.u
.derived
->name
);
9197 else if (c
->ts
.type
== BT_CHARACTER
)
9199 HOST_WIDE_INT charlen
= 0;
9200 if (c
->ts
.u
.cl
&& c
->ts
.u
.cl
->length
9201 && c
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
)
9202 charlen
= gfc_mpz_get_hwi (c
->ts
.u
.cl
->length
->value
.integer
);
9203 snprintf (name
, sizeof (name
),
9204 "__tmp_%s_" HOST_WIDE_INT_PRINT_DEC
"_%d",
9205 gfc_basic_typename (c
->ts
.type
), charlen
, c
->ts
.kind
);
9208 sprintf (name
, "__tmp_%s_%d", gfc_basic_typename (c
->ts
.type
),
9211 st
= gfc_find_symtree (ns
->sym_root
, name
);
9212 gcc_assert (st
->n
.sym
->assoc
);
9213 st
->n
.sym
->assoc
->target
= gfc_get_variable_expr (selector_expr
->symtree
);
9214 st
->n
.sym
->assoc
->target
->where
= selector_expr
->where
;
9215 if (c
->ts
.type
!= BT_CLASS
&& c
->ts
.type
!= BT_UNKNOWN
)
9217 gfc_add_data_component (st
->n
.sym
->assoc
->target
);
9218 /* Fixup the target expression if necessary. */
9220 fixup_array_ref (&st
->n
.sym
->assoc
->target
, NULL
, rank
, ref
);
9223 new_st
= gfc_get_code (EXEC_BLOCK
);
9224 new_st
->ext
.block
.ns
= gfc_build_block_ns (ns
);
9225 new_st
->ext
.block
.ns
->code
= body
->next
;
9226 body
->next
= new_st
;
9228 /* Chain in the new list only if it is marked as dangling. Otherwise
9229 there is a CASE label overlap and this is already used. Just ignore,
9230 the error is diagnosed elsewhere. */
9231 if (st
->n
.sym
->assoc
->dangling
)
9233 new_st
->ext
.block
.assoc
= st
->n
.sym
->assoc
;
9234 st
->n
.sym
->assoc
->dangling
= 0;
9237 resolve_assoc_var (st
->n
.sym
, false);
9240 /* Take out CLASS IS cases for separate treatment. */
9242 while (body
&& body
->block
)
9244 if (body
->block
->ext
.block
.case_list
->ts
.type
== BT_CLASS
)
9246 /* Add to class_is list. */
9247 if (class_is
== NULL
)
9249 class_is
= body
->block
;
9254 for (tail
= class_is
; tail
->block
; tail
= tail
->block
) ;
9255 tail
->block
= body
->block
;
9258 /* Remove from EXEC_SELECT list. */
9259 body
->block
= body
->block
->block
;
9272 /* Add a default case to hold the CLASS IS cases. */
9273 for (tail
= code
; tail
->block
; tail
= tail
->block
) ;
9274 tail
->block
= gfc_get_code (EXEC_SELECT_TYPE
);
9276 tail
->ext
.block
.case_list
= gfc_get_case ();
9277 tail
->ext
.block
.case_list
->ts
.type
= BT_UNKNOWN
;
9279 default_case
= tail
;
9282 /* More than one CLASS IS block? */
9283 if (class_is
->block
)
9287 /* Sort CLASS IS blocks by extension level. */
9291 for (c1
= &class_is
; (*c1
) && (*c1
)->block
; c1
= &((*c1
)->block
))
9294 /* F03:C817 (check for doubles). */
9295 if ((*c1
)->ext
.block
.case_list
->ts
.u
.derived
->hash_value
9296 == c2
->ext
.block
.case_list
->ts
.u
.derived
->hash_value
)
9298 gfc_error ("Double CLASS IS block in SELECT TYPE "
9300 &c2
->ext
.block
.case_list
->where
);
9303 if ((*c1
)->ext
.block
.case_list
->ts
.u
.derived
->attr
.extension
9304 < c2
->ext
.block
.case_list
->ts
.u
.derived
->attr
.extension
)
9307 (*c1
)->block
= c2
->block
;
9317 /* Generate IF chain. */
9318 if_st
= gfc_get_code (EXEC_IF
);
9320 for (body
= class_is
; body
; body
= body
->block
)
9322 new_st
->block
= gfc_get_code (EXEC_IF
);
9323 new_st
= new_st
->block
;
9324 /* Set up IF condition: Call _gfortran_is_extension_of. */
9325 new_st
->expr1
= gfc_get_expr ();
9326 new_st
->expr1
->expr_type
= EXPR_FUNCTION
;
9327 new_st
->expr1
->ts
.type
= BT_LOGICAL
;
9328 new_st
->expr1
->ts
.kind
= 4;
9329 new_st
->expr1
->value
.function
.name
= gfc_get_string (PREFIX ("is_extension_of"));
9330 new_st
->expr1
->value
.function
.isym
= XCNEW (gfc_intrinsic_sym
);
9331 new_st
->expr1
->value
.function
.isym
->id
= GFC_ISYM_EXTENDS_TYPE_OF
;
9332 /* Set up arguments. */
9333 new_st
->expr1
->value
.function
.actual
= gfc_get_actual_arglist ();
9334 new_st
->expr1
->value
.function
.actual
->expr
= gfc_get_variable_expr (selector_expr
->symtree
);
9335 new_st
->expr1
->value
.function
.actual
->expr
->where
= code
->loc
;
9336 new_st
->expr1
->where
= code
->loc
;
9337 gfc_add_vptr_component (new_st
->expr1
->value
.function
.actual
->expr
);
9338 vtab
= gfc_find_derived_vtab (body
->ext
.block
.case_list
->ts
.u
.derived
);
9339 st
= gfc_find_symtree (vtab
->ns
->sym_root
, vtab
->name
);
9340 new_st
->expr1
->value
.function
.actual
->next
= gfc_get_actual_arglist ();
9341 new_st
->expr1
->value
.function
.actual
->next
->expr
= gfc_get_variable_expr (st
);
9342 new_st
->expr1
->value
.function
.actual
->next
->expr
->where
= code
->loc
;
9343 new_st
->next
= body
->next
;
9345 if (default_case
->next
)
9347 new_st
->block
= gfc_get_code (EXEC_IF
);
9348 new_st
= new_st
->block
;
9349 new_st
->next
= default_case
->next
;
9352 /* Replace CLASS DEFAULT code by the IF chain. */
9353 default_case
->next
= if_st
;
9356 /* Resolve the internal code. This cannot be done earlier because
9357 it requires that the sym->assoc of selectors is set already. */
9358 gfc_current_ns
= ns
;
9359 gfc_resolve_blocks (code
->block
, gfc_current_ns
);
9360 gfc_current_ns
= old_ns
;
9367 /* Resolve a transfer statement. This is making sure that:
9368 -- a derived type being transferred has only non-pointer components
9369 -- a derived type being transferred doesn't have private components, unless
9370 it's being transferred from the module where the type was defined
9371 -- we're not trying to transfer a whole assumed size array. */
9374 resolve_transfer (gfc_code
*code
)
9376 gfc_symbol
*sym
, *derived
;
9380 bool formatted
= false;
9381 gfc_dt
*dt
= code
->ext
.dt
;
9382 gfc_symbol
*dtio_sub
= NULL
;
9386 while (exp
!= NULL
&& exp
->expr_type
== EXPR_OP
9387 && exp
->value
.op
.op
== INTRINSIC_PARENTHESES
)
9388 exp
= exp
->value
.op
.op1
;
9390 if (exp
&& exp
->expr_type
== EXPR_NULL
9393 gfc_error ("Invalid context for NULL () intrinsic at %L",
9398 if (exp
== NULL
|| (exp
->expr_type
!= EXPR_VARIABLE
9399 && exp
->expr_type
!= EXPR_FUNCTION
9400 && exp
->expr_type
!= EXPR_STRUCTURE
))
9403 /* If we are reading, the variable will be changed. Note that
9404 code->ext.dt may be NULL if the TRANSFER is related to
9405 an INQUIRE statement -- but in this case, we are not reading, either. */
9406 if (dt
&& dt
->dt_io_kind
->value
.iokind
== M_READ
9407 && !gfc_check_vardef_context (exp
, false, false, false,
9411 const gfc_typespec
*ts
= exp
->expr_type
== EXPR_STRUCTURE
9412 || exp
->expr_type
== EXPR_FUNCTION
9413 ? &exp
->ts
: &exp
->symtree
->n
.sym
->ts
;
9415 /* Go to actual component transferred. */
9416 for (ref
= exp
->ref
; ref
; ref
= ref
->next
)
9417 if (ref
->type
== REF_COMPONENT
)
9418 ts
= &ref
->u
.c
.component
->ts
;
9420 if (dt
&& dt
->dt_io_kind
->value
.iokind
!= M_INQUIRE
9421 && (ts
->type
== BT_DERIVED
|| ts
->type
== BT_CLASS
))
9423 derived
= ts
->u
.derived
;
9425 /* Determine when to use the formatted DTIO procedure. */
9426 if (dt
&& (dt
->format_expr
|| dt
->format_label
))
9429 write
= dt
->dt_io_kind
->value
.iokind
== M_WRITE
9430 || dt
->dt_io_kind
->value
.iokind
== M_PRINT
;
9431 dtio_sub
= gfc_find_specific_dtio_proc (derived
, write
, formatted
);
9433 if (dtio_sub
!= NULL
&& exp
->expr_type
== EXPR_VARIABLE
)
9436 sym
= exp
->symtree
->n
.sym
->ns
->proc_name
;
9437 /* Check to see if this is a nested DTIO call, with the
9438 dummy as the io-list object. */
9439 if (sym
&& sym
== dtio_sub
&& sym
->formal
9440 && sym
->formal
->sym
== exp
->symtree
->n
.sym
9441 && exp
->ref
== NULL
)
9443 if (!sym
->attr
.recursive
)
9445 gfc_error ("DTIO %s procedure at %L must be recursive",
9446 sym
->name
, &sym
->declared_at
);
9453 if (ts
->type
== BT_CLASS
&& dtio_sub
== NULL
)
9455 gfc_error ("Data transfer element at %L cannot be polymorphic unless "
9456 "it is processed by a defined input/output procedure",
9461 if (ts
->type
== BT_DERIVED
)
9463 /* Check that transferred derived type doesn't contain POINTER
9464 components unless it is processed by a defined input/output
9466 if (ts
->u
.derived
->attr
.pointer_comp
&& dtio_sub
== NULL
)
9468 gfc_error ("Data transfer element at %L cannot have POINTER "
9469 "components unless it is processed by a defined "
9470 "input/output procedure", &code
->loc
);
9475 if (ts
->u
.derived
->attr
.proc_pointer_comp
)
9477 gfc_error ("Data transfer element at %L cannot have "
9478 "procedure pointer components", &code
->loc
);
9482 if (ts
->u
.derived
->attr
.alloc_comp
&& dtio_sub
== NULL
)
9484 gfc_error ("Data transfer element at %L cannot have ALLOCATABLE "
9485 "components unless it is processed by a defined "
9486 "input/output procedure", &code
->loc
);
9490 /* C_PTR and C_FUNPTR have private components which means they cannot
9491 be printed. However, if -std=gnu and not -pedantic, allow
9492 the component to be printed to help debugging. */
9493 if (ts
->u
.derived
->ts
.f90_type
== BT_VOID
)
9495 if (!gfc_notify_std (GFC_STD_GNU
, "Data transfer element at %L "
9496 "cannot have PRIVATE components", &code
->loc
))
9499 else if (derived_inaccessible (ts
->u
.derived
) && dtio_sub
== NULL
)
9501 gfc_error ("Data transfer element at %L cannot have "
9502 "PRIVATE components unless it is processed by "
9503 "a defined input/output procedure", &code
->loc
);
9508 if (exp
->expr_type
== EXPR_STRUCTURE
)
9511 sym
= exp
->symtree
->n
.sym
;
9513 if (sym
->as
!= NULL
&& sym
->as
->type
== AS_ASSUMED_SIZE
&& exp
->ref
9514 && exp
->ref
->type
== REF_ARRAY
&& exp
->ref
->u
.ar
.type
== AR_FULL
)
9516 gfc_error ("Data transfer element at %L cannot be a full reference to "
9517 "an assumed-size array", &code
->loc
);
9521 if (async_io_dt
&& exp
->expr_type
== EXPR_VARIABLE
)
9522 exp
->symtree
->n
.sym
->attr
.asynchronous
= 1;
9526 /*********** Toplevel code resolution subroutines ***********/
9528 /* Find the set of labels that are reachable from this block. We also
9529 record the last statement in each block. */
9532 find_reachable_labels (gfc_code
*block
)
9539 cs_base
->reachable_labels
= bitmap_alloc (&labels_obstack
);
9541 /* Collect labels in this block. We don't keep those corresponding
9542 to END {IF|SELECT}, these are checked in resolve_branch by going
9543 up through the code_stack. */
9544 for (c
= block
; c
; c
= c
->next
)
9546 if (c
->here
&& c
->op
!= EXEC_END_NESTED_BLOCK
)
9547 bitmap_set_bit (cs_base
->reachable_labels
, c
->here
->value
);
9550 /* Merge with labels from parent block. */
9553 gcc_assert (cs_base
->prev
->reachable_labels
);
9554 bitmap_ior_into (cs_base
->reachable_labels
,
9555 cs_base
->prev
->reachable_labels
);
9561 resolve_lock_unlock_event (gfc_code
*code
)
9563 if (code
->expr1
->expr_type
== EXPR_FUNCTION
9564 && code
->expr1
->value
.function
.isym
9565 && code
->expr1
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
)
9566 remove_caf_get_intrinsic (code
->expr1
);
9568 if ((code
->op
== EXEC_LOCK
|| code
->op
== EXEC_UNLOCK
)
9569 && (code
->expr1
->ts
.type
!= BT_DERIVED
9570 || code
->expr1
->expr_type
!= EXPR_VARIABLE
9571 || code
->expr1
->ts
.u
.derived
->from_intmod
!= INTMOD_ISO_FORTRAN_ENV
9572 || code
->expr1
->ts
.u
.derived
->intmod_sym_id
!= ISOFORTRAN_LOCK_TYPE
9573 || code
->expr1
->rank
!= 0
9574 || (!gfc_is_coarray (code
->expr1
) &&
9575 !gfc_is_coindexed (code
->expr1
))))
9576 gfc_error ("Lock variable at %L must be a scalar of type LOCK_TYPE",
9577 &code
->expr1
->where
);
9578 else if ((code
->op
== EXEC_EVENT_POST
|| code
->op
== EXEC_EVENT_WAIT
)
9579 && (code
->expr1
->ts
.type
!= BT_DERIVED
9580 || code
->expr1
->expr_type
!= EXPR_VARIABLE
9581 || code
->expr1
->ts
.u
.derived
->from_intmod
9582 != INTMOD_ISO_FORTRAN_ENV
9583 || code
->expr1
->ts
.u
.derived
->intmod_sym_id
9584 != ISOFORTRAN_EVENT_TYPE
9585 || code
->expr1
->rank
!= 0))
9586 gfc_error ("Event variable at %L must be a scalar of type EVENT_TYPE",
9587 &code
->expr1
->where
);
9588 else if (code
->op
== EXEC_EVENT_POST
&& !gfc_is_coarray (code
->expr1
)
9589 && !gfc_is_coindexed (code
->expr1
))
9590 gfc_error ("Event variable argument at %L must be a coarray or coindexed",
9591 &code
->expr1
->where
);
9592 else if (code
->op
== EXEC_EVENT_WAIT
&& !gfc_is_coarray (code
->expr1
))
9593 gfc_error ("Event variable argument at %L must be a coarray but not "
9594 "coindexed", &code
->expr1
->where
);
9598 && (code
->expr2
->ts
.type
!= BT_INTEGER
|| code
->expr2
->rank
!= 0
9599 || code
->expr2
->expr_type
!= EXPR_VARIABLE
))
9600 gfc_error ("STAT= argument at %L must be a scalar INTEGER variable",
9601 &code
->expr2
->where
);
9604 && !gfc_check_vardef_context (code
->expr2
, false, false, false,
9605 _("STAT variable")))
9610 && (code
->expr3
->ts
.type
!= BT_CHARACTER
|| code
->expr3
->rank
!= 0
9611 || code
->expr3
->expr_type
!= EXPR_VARIABLE
))
9612 gfc_error ("ERRMSG= argument at %L must be a scalar CHARACTER variable",
9613 &code
->expr3
->where
);
9616 && !gfc_check_vardef_context (code
->expr3
, false, false, false,
9617 _("ERRMSG variable")))
9620 /* Check for LOCK the ACQUIRED_LOCK. */
9621 if (code
->op
!= EXEC_EVENT_WAIT
&& code
->expr4
9622 && (code
->expr4
->ts
.type
!= BT_LOGICAL
|| code
->expr4
->rank
!= 0
9623 || code
->expr4
->expr_type
!= EXPR_VARIABLE
))
9624 gfc_error ("ACQUIRED_LOCK= argument at %L must be a scalar LOGICAL "
9625 "variable", &code
->expr4
->where
);
9627 if (code
->op
!= EXEC_EVENT_WAIT
&& code
->expr4
9628 && !gfc_check_vardef_context (code
->expr4
, false, false, false,
9629 _("ACQUIRED_LOCK variable")))
9632 /* Check for EVENT WAIT the UNTIL_COUNT. */
9633 if (code
->op
== EXEC_EVENT_WAIT
&& code
->expr4
)
9635 if (!gfc_resolve_expr (code
->expr4
) || code
->expr4
->ts
.type
!= BT_INTEGER
9636 || code
->expr4
->rank
!= 0)
9637 gfc_error ("UNTIL_COUNT= argument at %L must be a scalar INTEGER "
9638 "expression", &code
->expr4
->where
);
9644 resolve_critical (gfc_code
*code
)
9646 gfc_symtree
*symtree
;
9647 gfc_symbol
*lock_type
;
9648 char name
[GFC_MAX_SYMBOL_LEN
];
9649 static int serial
= 0;
9651 if (flag_coarray
!= GFC_FCOARRAY_LIB
)
9654 symtree
= gfc_find_symtree (gfc_current_ns
->sym_root
,
9655 GFC_PREFIX ("lock_type"));
9657 lock_type
= symtree
->n
.sym
;
9660 if (gfc_get_sym_tree (GFC_PREFIX ("lock_type"), gfc_current_ns
, &symtree
,
9663 lock_type
= symtree
->n
.sym
;
9664 lock_type
->attr
.flavor
= FL_DERIVED
;
9665 lock_type
->attr
.zero_comp
= 1;
9666 lock_type
->from_intmod
= INTMOD_ISO_FORTRAN_ENV
;
9667 lock_type
->intmod_sym_id
= ISOFORTRAN_LOCK_TYPE
;
9670 sprintf(name
, GFC_PREFIX ("lock_var") "%d",serial
++);
9671 if (gfc_get_sym_tree (name
, gfc_current_ns
, &symtree
, false) != 0)
9674 code
->resolved_sym
= symtree
->n
.sym
;
9675 symtree
->n
.sym
->attr
.flavor
= FL_VARIABLE
;
9676 symtree
->n
.sym
->attr
.referenced
= 1;
9677 symtree
->n
.sym
->attr
.artificial
= 1;
9678 symtree
->n
.sym
->attr
.codimension
= 1;
9679 symtree
->n
.sym
->ts
.type
= BT_DERIVED
;
9680 symtree
->n
.sym
->ts
.u
.derived
= lock_type
;
9681 symtree
->n
.sym
->as
= gfc_get_array_spec ();
9682 symtree
->n
.sym
->as
->corank
= 1;
9683 symtree
->n
.sym
->as
->type
= AS_EXPLICIT
;
9684 symtree
->n
.sym
->as
->cotype
= AS_EXPLICIT
;
9685 symtree
->n
.sym
->as
->lower
[0] = gfc_get_int_expr (gfc_default_integer_kind
,
9687 gfc_commit_symbols();
9692 resolve_sync (gfc_code
*code
)
9694 /* Check imageset. The * case matches expr1 == NULL. */
9697 if (code
->expr1
->ts
.type
!= BT_INTEGER
|| code
->expr1
->rank
> 1)
9698 gfc_error ("Imageset argument at %L must be a scalar or rank-1 "
9699 "INTEGER expression", &code
->expr1
->where
);
9700 if (code
->expr1
->expr_type
== EXPR_CONSTANT
&& code
->expr1
->rank
== 0
9701 && mpz_cmp_si (code
->expr1
->value
.integer
, 1) < 0)
9702 gfc_error ("Imageset argument at %L must between 1 and num_images()",
9703 &code
->expr1
->where
);
9704 else if (code
->expr1
->expr_type
== EXPR_ARRAY
9705 && gfc_simplify_expr (code
->expr1
, 0))
9707 gfc_constructor
*cons
;
9708 cons
= gfc_constructor_first (code
->expr1
->value
.constructor
);
9709 for (; cons
; cons
= gfc_constructor_next (cons
))
9710 if (cons
->expr
->expr_type
== EXPR_CONSTANT
9711 && mpz_cmp_si (cons
->expr
->value
.integer
, 1) < 0)
9712 gfc_error ("Imageset argument at %L must between 1 and "
9713 "num_images()", &cons
->expr
->where
);
9718 gfc_resolve_expr (code
->expr2
);
9720 && (code
->expr2
->ts
.type
!= BT_INTEGER
|| code
->expr2
->rank
!= 0
9721 || code
->expr2
->expr_type
!= EXPR_VARIABLE
))
9722 gfc_error ("STAT= argument at %L must be a scalar INTEGER variable",
9723 &code
->expr2
->where
);
9726 gfc_resolve_expr (code
->expr3
);
9728 && (code
->expr3
->ts
.type
!= BT_CHARACTER
|| code
->expr3
->rank
!= 0
9729 || code
->expr3
->expr_type
!= EXPR_VARIABLE
))
9730 gfc_error ("ERRMSG= argument at %L must be a scalar CHARACTER variable",
9731 &code
->expr3
->where
);
9735 /* Given a branch to a label, see if the branch is conforming.
9736 The code node describes where the branch is located. */
9739 resolve_branch (gfc_st_label
*label
, gfc_code
*code
)
9746 /* Step one: is this a valid branching target? */
9748 if (label
->defined
== ST_LABEL_UNKNOWN
)
9750 gfc_error ("Label %d referenced at %L is never defined", label
->value
,
9755 if (label
->defined
!= ST_LABEL_TARGET
&& label
->defined
!= ST_LABEL_DO_TARGET
)
9757 gfc_error ("Statement at %L is not a valid branch target statement "
9758 "for the branch statement at %L", &label
->where
, &code
->loc
);
9762 /* Step two: make sure this branch is not a branch to itself ;-) */
9764 if (code
->here
== label
)
9767 "Branch at %L may result in an infinite loop", &code
->loc
);
9771 /* Step three: See if the label is in the same block as the
9772 branching statement. The hard work has been done by setting up
9773 the bitmap reachable_labels. */
9775 if (bitmap_bit_p (cs_base
->reachable_labels
, label
->value
))
9777 /* Check now whether there is a CRITICAL construct; if so, check
9778 whether the label is still visible outside of the CRITICAL block,
9779 which is invalid. */
9780 for (stack
= cs_base
; stack
; stack
= stack
->prev
)
9782 if (stack
->current
->op
== EXEC_CRITICAL
9783 && bitmap_bit_p (stack
->reachable_labels
, label
->value
))
9784 gfc_error ("GOTO statement at %L leaves CRITICAL construct for "
9785 "label at %L", &code
->loc
, &label
->where
);
9786 else if (stack
->current
->op
== EXEC_DO_CONCURRENT
9787 && bitmap_bit_p (stack
->reachable_labels
, label
->value
))
9788 gfc_error ("GOTO statement at %L leaves DO CONCURRENT construct "
9789 "for label at %L", &code
->loc
, &label
->where
);
9795 /* Step four: If we haven't found the label in the bitmap, it may
9796 still be the label of the END of the enclosing block, in which
9797 case we find it by going up the code_stack. */
9799 for (stack
= cs_base
; stack
; stack
= stack
->prev
)
9801 if (stack
->current
->next
&& stack
->current
->next
->here
== label
)
9803 if (stack
->current
->op
== EXEC_CRITICAL
)
9805 /* Note: A label at END CRITICAL does not leave the CRITICAL
9806 construct as END CRITICAL is still part of it. */
9807 gfc_error ("GOTO statement at %L leaves CRITICAL construct for label"
9808 " at %L", &code
->loc
, &label
->where
);
9811 else if (stack
->current
->op
== EXEC_DO_CONCURRENT
)
9813 gfc_error ("GOTO statement at %L leaves DO CONCURRENT construct for "
9814 "label at %L", &code
->loc
, &label
->where
);
9821 gcc_assert (stack
->current
->next
->op
== EXEC_END_NESTED_BLOCK
);
9825 /* The label is not in an enclosing block, so illegal. This was
9826 allowed in Fortran 66, so we allow it as extension. No
9827 further checks are necessary in this case. */
9828 gfc_notify_std (GFC_STD_LEGACY
, "Label at %L is not in the same block "
9829 "as the GOTO statement at %L", &label
->where
,
9835 /* Check whether EXPR1 has the same shape as EXPR2. */
9838 resolve_where_shape (gfc_expr
*expr1
, gfc_expr
*expr2
)
9840 mpz_t shape
[GFC_MAX_DIMENSIONS
];
9841 mpz_t shape2
[GFC_MAX_DIMENSIONS
];
9842 bool result
= false;
9845 /* Compare the rank. */
9846 if (expr1
->rank
!= expr2
->rank
)
9849 /* Compare the size of each dimension. */
9850 for (i
=0; i
<expr1
->rank
; i
++)
9852 if (!gfc_array_dimen_size (expr1
, i
, &shape
[i
]))
9855 if (!gfc_array_dimen_size (expr2
, i
, &shape2
[i
]))
9858 if (mpz_cmp (shape
[i
], shape2
[i
]))
9862 /* When either of the two expression is an assumed size array, we
9863 ignore the comparison of dimension sizes. */
9868 gfc_clear_shape (shape
, i
);
9869 gfc_clear_shape (shape2
, i
);
9874 /* Check whether a WHERE assignment target or a WHERE mask expression
9875 has the same shape as the outmost WHERE mask expression. */
9878 resolve_where (gfc_code
*code
, gfc_expr
*mask
)
9884 cblock
= code
->block
;
9886 /* Store the first WHERE mask-expr of the WHERE statement or construct.
9887 In case of nested WHERE, only the outmost one is stored. */
9888 if (mask
== NULL
) /* outmost WHERE */
9890 else /* inner WHERE */
9897 /* Check if the mask-expr has a consistent shape with the
9898 outmost WHERE mask-expr. */
9899 if (!resolve_where_shape (cblock
->expr1
, e
))
9900 gfc_error ("WHERE mask at %L has inconsistent shape",
9901 &cblock
->expr1
->where
);
9904 /* the assignment statement of a WHERE statement, or the first
9905 statement in where-body-construct of a WHERE construct */
9906 cnext
= cblock
->next
;
9911 /* WHERE assignment statement */
9914 /* Check shape consistent for WHERE assignment target. */
9915 if (e
&& !resolve_where_shape (cnext
->expr1
, e
))
9916 gfc_error ("WHERE assignment target at %L has "
9917 "inconsistent shape", &cnext
->expr1
->where
);
9921 case EXEC_ASSIGN_CALL
:
9922 resolve_call (cnext
);
9923 if (!cnext
->resolved_sym
->attr
.elemental
)
9924 gfc_error("Non-ELEMENTAL user-defined assignment in WHERE at %L",
9925 &cnext
->ext
.actual
->expr
->where
);
9928 /* WHERE or WHERE construct is part of a where-body-construct */
9930 resolve_where (cnext
, e
);
9934 gfc_error ("Unsupported statement inside WHERE at %L",
9937 /* the next statement within the same where-body-construct */
9938 cnext
= cnext
->next
;
9940 /* the next masked-elsewhere-stmt, elsewhere-stmt, or end-where-stmt */
9941 cblock
= cblock
->block
;
9946 /* Resolve assignment in FORALL construct.
9947 NVAR is the number of FORALL index variables, and VAR_EXPR records the
9948 FORALL index variables. */
9951 gfc_resolve_assign_in_forall (gfc_code
*code
, int nvar
, gfc_expr
**var_expr
)
9955 for (n
= 0; n
< nvar
; n
++)
9957 gfc_symbol
*forall_index
;
9959 forall_index
= var_expr
[n
]->symtree
->n
.sym
;
9961 /* Check whether the assignment target is one of the FORALL index
9963 if ((code
->expr1
->expr_type
== EXPR_VARIABLE
)
9964 && (code
->expr1
->symtree
->n
.sym
== forall_index
))
9965 gfc_error ("Assignment to a FORALL index variable at %L",
9966 &code
->expr1
->where
);
9969 /* If one of the FORALL index variables doesn't appear in the
9970 assignment variable, then there could be a many-to-one
9971 assignment. Emit a warning rather than an error because the
9972 mask could be resolving this problem. */
9973 if (!find_forall_index (code
->expr1
, forall_index
, 0))
9974 gfc_warning (0, "The FORALL with index %qs is not used on the "
9975 "left side of the assignment at %L and so might "
9976 "cause multiple assignment to this object",
9977 var_expr
[n
]->symtree
->name
, &code
->expr1
->where
);
9983 /* Resolve WHERE statement in FORALL construct. */
9986 gfc_resolve_where_code_in_forall (gfc_code
*code
, int nvar
,
9987 gfc_expr
**var_expr
)
9992 cblock
= code
->block
;
9995 /* the assignment statement of a WHERE statement, or the first
9996 statement in where-body-construct of a WHERE construct */
9997 cnext
= cblock
->next
;
10002 /* WHERE assignment statement */
10004 gfc_resolve_assign_in_forall (cnext
, nvar
, var_expr
);
10007 /* WHERE operator assignment statement */
10008 case EXEC_ASSIGN_CALL
:
10009 resolve_call (cnext
);
10010 if (!cnext
->resolved_sym
->attr
.elemental
)
10011 gfc_error("Non-ELEMENTAL user-defined assignment in WHERE at %L",
10012 &cnext
->ext
.actual
->expr
->where
);
10015 /* WHERE or WHERE construct is part of a where-body-construct */
10017 gfc_resolve_where_code_in_forall (cnext
, nvar
, var_expr
);
10021 gfc_error ("Unsupported statement inside WHERE at %L",
10024 /* the next statement within the same where-body-construct */
10025 cnext
= cnext
->next
;
10027 /* the next masked-elsewhere-stmt, elsewhere-stmt, or end-where-stmt */
10028 cblock
= cblock
->block
;
10033 /* Traverse the FORALL body to check whether the following errors exist:
10034 1. For assignment, check if a many-to-one assignment happens.
10035 2. For WHERE statement, check the WHERE body to see if there is any
10036 many-to-one assignment. */
10039 gfc_resolve_forall_body (gfc_code
*code
, int nvar
, gfc_expr
**var_expr
)
10043 c
= code
->block
->next
;
10049 case EXEC_POINTER_ASSIGN
:
10050 gfc_resolve_assign_in_forall (c
, nvar
, var_expr
);
10053 case EXEC_ASSIGN_CALL
:
10057 /* Because the gfc_resolve_blocks() will handle the nested FORALL,
10058 there is no need to handle it here. */
10062 gfc_resolve_where_code_in_forall(c
, nvar
, var_expr
);
10067 /* The next statement in the FORALL body. */
10073 /* Counts the number of iterators needed inside a forall construct, including
10074 nested forall constructs. This is used to allocate the needed memory
10075 in gfc_resolve_forall. */
10078 gfc_count_forall_iterators (gfc_code
*code
)
10080 int max_iters
, sub_iters
, current_iters
;
10081 gfc_forall_iterator
*fa
;
10083 gcc_assert(code
->op
== EXEC_FORALL
);
10087 for (fa
= code
->ext
.forall_iterator
; fa
; fa
= fa
->next
)
10090 code
= code
->block
->next
;
10094 if (code
->op
== EXEC_FORALL
)
10096 sub_iters
= gfc_count_forall_iterators (code
);
10097 if (sub_iters
> max_iters
)
10098 max_iters
= sub_iters
;
10103 return current_iters
+ max_iters
;
10107 /* Given a FORALL construct, first resolve the FORALL iterator, then call
10108 gfc_resolve_forall_body to resolve the FORALL body. */
10111 gfc_resolve_forall (gfc_code
*code
, gfc_namespace
*ns
, int forall_save
)
10113 static gfc_expr
**var_expr
;
10114 static int total_var
= 0;
10115 static int nvar
= 0;
10116 int i
, old_nvar
, tmp
;
10117 gfc_forall_iterator
*fa
;
10121 if (!gfc_notify_std (GFC_STD_F2018_OBS
, "FORALL construct at %L", &code
->loc
))
10124 /* Start to resolve a FORALL construct */
10125 if (forall_save
== 0)
10127 /* Count the total number of FORALL indices in the nested FORALL
10128 construct in order to allocate the VAR_EXPR with proper size. */
10129 total_var
= gfc_count_forall_iterators (code
);
10131 /* Allocate VAR_EXPR with NUMBER_OF_FORALL_INDEX elements. */
10132 var_expr
= XCNEWVEC (gfc_expr
*, total_var
);
10135 /* The information about FORALL iterator, including FORALL indices start, end
10136 and stride. An outer FORALL indice cannot appear in start, end or stride. */
10137 for (fa
= code
->ext
.forall_iterator
; fa
; fa
= fa
->next
)
10139 /* Fortran 20008: C738 (R753). */
10140 if (fa
->var
->ref
&& fa
->var
->ref
->type
== REF_ARRAY
)
10142 gfc_error ("FORALL index-name at %L must be a scalar variable "
10143 "of type integer", &fa
->var
->where
);
10147 /* Check if any outer FORALL index name is the same as the current
10149 for (i
= 0; i
< nvar
; i
++)
10151 if (fa
->var
->symtree
->n
.sym
== var_expr
[i
]->symtree
->n
.sym
)
10152 gfc_error ("An outer FORALL construct already has an index "
10153 "with this name %L", &fa
->var
->where
);
10156 /* Record the current FORALL index. */
10157 var_expr
[nvar
] = gfc_copy_expr (fa
->var
);
10161 /* No memory leak. */
10162 gcc_assert (nvar
<= total_var
);
10165 /* Resolve the FORALL body. */
10166 gfc_resolve_forall_body (code
, nvar
, var_expr
);
10168 /* May call gfc_resolve_forall to resolve the inner FORALL loop. */
10169 gfc_resolve_blocks (code
->block
, ns
);
10173 /* Free only the VAR_EXPRs allocated in this frame. */
10174 for (i
= nvar
; i
< tmp
; i
++)
10175 gfc_free_expr (var_expr
[i
]);
10179 /* We are in the outermost FORALL construct. */
10180 gcc_assert (forall_save
== 0);
10182 /* VAR_EXPR is not needed any more. */
10189 /* Resolve a BLOCK construct statement. */
10192 resolve_block_construct (gfc_code
* code
)
10194 /* Resolve the BLOCK's namespace. */
10195 gfc_resolve (code
->ext
.block
.ns
);
10197 /* For an ASSOCIATE block, the associations (and their targets) are already
10198 resolved during resolve_symbol. */
10202 /* Resolve lists of blocks found in IF, SELECT CASE, WHERE, FORALL, GOTO and
10206 gfc_resolve_blocks (gfc_code
*b
, gfc_namespace
*ns
)
10210 for (; b
; b
= b
->block
)
10212 t
= gfc_resolve_expr (b
->expr1
);
10213 if (!gfc_resolve_expr (b
->expr2
))
10219 if (t
&& b
->expr1
!= NULL
10220 && (b
->expr1
->ts
.type
!= BT_LOGICAL
|| b
->expr1
->rank
!= 0))
10221 gfc_error ("IF clause at %L requires a scalar LOGICAL expression",
10227 && b
->expr1
!= NULL
10228 && (b
->expr1
->ts
.type
!= BT_LOGICAL
|| b
->expr1
->rank
== 0))
10229 gfc_error ("WHERE/ELSEWHERE clause at %L requires a LOGICAL array",
10234 resolve_branch (b
->label1
, b
);
10238 resolve_block_construct (b
);
10242 case EXEC_SELECT_TYPE
:
10245 case EXEC_DO_WHILE
:
10246 case EXEC_DO_CONCURRENT
:
10247 case EXEC_CRITICAL
:
10250 case EXEC_IOLENGTH
:
10254 case EXEC_OMP_ATOMIC
:
10255 case EXEC_OACC_ATOMIC
:
10257 gfc_omp_atomic_op aop
10258 = (gfc_omp_atomic_op
) (b
->ext
.omp_atomic
& GFC_OMP_ATOMIC_MASK
);
10260 /* Verify this before calling gfc_resolve_code, which might
10262 gcc_assert (b
->next
&& b
->next
->op
== EXEC_ASSIGN
);
10263 gcc_assert (((aop
!= GFC_OMP_ATOMIC_CAPTURE
)
10264 && b
->next
->next
== NULL
)
10265 || ((aop
== GFC_OMP_ATOMIC_CAPTURE
)
10266 && b
->next
->next
!= NULL
10267 && b
->next
->next
->op
== EXEC_ASSIGN
10268 && b
->next
->next
->next
== NULL
));
10272 case EXEC_OACC_PARALLEL_LOOP
:
10273 case EXEC_OACC_PARALLEL
:
10274 case EXEC_OACC_KERNELS_LOOP
:
10275 case EXEC_OACC_KERNELS
:
10276 case EXEC_OACC_DATA
:
10277 case EXEC_OACC_HOST_DATA
:
10278 case EXEC_OACC_LOOP
:
10279 case EXEC_OACC_UPDATE
:
10280 case EXEC_OACC_WAIT
:
10281 case EXEC_OACC_CACHE
:
10282 case EXEC_OACC_ENTER_DATA
:
10283 case EXEC_OACC_EXIT_DATA
:
10284 case EXEC_OACC_ROUTINE
:
10285 case EXEC_OMP_CRITICAL
:
10286 case EXEC_OMP_DISTRIBUTE
:
10287 case EXEC_OMP_DISTRIBUTE_PARALLEL_DO
:
10288 case EXEC_OMP_DISTRIBUTE_PARALLEL_DO_SIMD
:
10289 case EXEC_OMP_DISTRIBUTE_SIMD
:
10291 case EXEC_OMP_DO_SIMD
:
10292 case EXEC_OMP_MASTER
:
10293 case EXEC_OMP_ORDERED
:
10294 case EXEC_OMP_PARALLEL
:
10295 case EXEC_OMP_PARALLEL_DO
:
10296 case EXEC_OMP_PARALLEL_DO_SIMD
:
10297 case EXEC_OMP_PARALLEL_SECTIONS
:
10298 case EXEC_OMP_PARALLEL_WORKSHARE
:
10299 case EXEC_OMP_SECTIONS
:
10300 case EXEC_OMP_SIMD
:
10301 case EXEC_OMP_SINGLE
:
10302 case EXEC_OMP_TARGET
:
10303 case EXEC_OMP_TARGET_DATA
:
10304 case EXEC_OMP_TARGET_ENTER_DATA
:
10305 case EXEC_OMP_TARGET_EXIT_DATA
:
10306 case EXEC_OMP_TARGET_PARALLEL
:
10307 case EXEC_OMP_TARGET_PARALLEL_DO
:
10308 case EXEC_OMP_TARGET_PARALLEL_DO_SIMD
:
10309 case EXEC_OMP_TARGET_SIMD
:
10310 case EXEC_OMP_TARGET_TEAMS
:
10311 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE
:
10312 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO
:
10313 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
10314 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_SIMD
:
10315 case EXEC_OMP_TARGET_UPDATE
:
10316 case EXEC_OMP_TASK
:
10317 case EXEC_OMP_TASKGROUP
:
10318 case EXEC_OMP_TASKLOOP
:
10319 case EXEC_OMP_TASKLOOP_SIMD
:
10320 case EXEC_OMP_TASKWAIT
:
10321 case EXEC_OMP_TASKYIELD
:
10322 case EXEC_OMP_TEAMS
:
10323 case EXEC_OMP_TEAMS_DISTRIBUTE
:
10324 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO
:
10325 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
10326 case EXEC_OMP_TEAMS_DISTRIBUTE_SIMD
:
10327 case EXEC_OMP_WORKSHARE
:
10331 gfc_internal_error ("gfc_resolve_blocks(): Bad block type");
10334 gfc_resolve_code (b
->next
, ns
);
10339 /* Does everything to resolve an ordinary assignment. Returns true
10340 if this is an interface assignment. */
10342 resolve_ordinary_assign (gfc_code
*code
, gfc_namespace
*ns
)
10349 symbol_attribute attr
;
10351 if (gfc_extend_assign (code
, ns
))
10355 if (code
->op
== EXEC_ASSIGN_CALL
)
10357 lhs
= code
->ext
.actual
->expr
;
10358 rhsptr
= &code
->ext
.actual
->next
->expr
;
10362 gfc_actual_arglist
* args
;
10363 gfc_typebound_proc
* tbp
;
10365 gcc_assert (code
->op
== EXEC_COMPCALL
);
10367 args
= code
->expr1
->value
.compcall
.actual
;
10369 rhsptr
= &args
->next
->expr
;
10371 tbp
= code
->expr1
->value
.compcall
.tbp
;
10372 gcc_assert (!tbp
->is_generic
);
10375 /* Make a temporary rhs when there is a default initializer
10376 and rhs is the same symbol as the lhs. */
10377 if ((*rhsptr
)->expr_type
== EXPR_VARIABLE
10378 && (*rhsptr
)->symtree
->n
.sym
->ts
.type
== BT_DERIVED
10379 && gfc_has_default_initializer ((*rhsptr
)->symtree
->n
.sym
->ts
.u
.derived
)
10380 && (lhs
->symtree
->n
.sym
== (*rhsptr
)->symtree
->n
.sym
))
10381 *rhsptr
= gfc_get_parentheses (*rhsptr
);
10390 && !gfc_notify_std (GFC_STD_GNU
, "BOZ literal at %L outside "
10391 "a DATA statement and outside INT/REAL/DBLE/CMPLX",
10395 /* Handle the case of a BOZ literal on the RHS. */
10396 if (rhs
->is_boz
&& lhs
->ts
.type
!= BT_INTEGER
)
10399 if (warn_surprising
)
10400 gfc_warning (OPT_Wsurprising
,
10401 "BOZ literal at %L is bitwise transferred "
10402 "non-integer symbol %qs", &code
->loc
,
10403 lhs
->symtree
->n
.sym
->name
);
10405 if (!gfc_convert_boz (rhs
, &lhs
->ts
))
10407 if ((rc
= gfc_range_check (rhs
)) != ARITH_OK
)
10409 if (rc
== ARITH_UNDERFLOW
)
10410 gfc_error ("Arithmetic underflow of bit-wise transferred BOZ at %L"
10411 ". This check can be disabled with the option "
10412 "%<-fno-range-check%>", &rhs
->where
);
10413 else if (rc
== ARITH_OVERFLOW
)
10414 gfc_error ("Arithmetic overflow of bit-wise transferred BOZ at %L"
10415 ". This check can be disabled with the option "
10416 "%<-fno-range-check%>", &rhs
->where
);
10417 else if (rc
== ARITH_NAN
)
10418 gfc_error ("Arithmetic NaN of bit-wise transferred BOZ at %L"
10419 ". This check can be disabled with the option "
10420 "%<-fno-range-check%>", &rhs
->where
);
10425 if (lhs
->ts
.type
== BT_CHARACTER
10426 && warn_character_truncation
)
10428 HOST_WIDE_INT llen
= 0, rlen
= 0;
10429 if (lhs
->ts
.u
.cl
!= NULL
10430 && lhs
->ts
.u
.cl
->length
!= NULL
10431 && lhs
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
)
10432 llen
= gfc_mpz_get_hwi (lhs
->ts
.u
.cl
->length
->value
.integer
);
10434 if (rhs
->expr_type
== EXPR_CONSTANT
)
10435 rlen
= rhs
->value
.character
.length
;
10437 else if (rhs
->ts
.u
.cl
!= NULL
10438 && rhs
->ts
.u
.cl
->length
!= NULL
10439 && rhs
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
)
10440 rlen
= gfc_mpz_get_hwi (rhs
->ts
.u
.cl
->length
->value
.integer
);
10442 if (rlen
&& llen
&& rlen
> llen
)
10443 gfc_warning_now (OPT_Wcharacter_truncation
,
10444 "CHARACTER expression will be truncated "
10445 "in assignment (%ld/%ld) at %L",
10446 (long) llen
, (long) rlen
, &code
->loc
);
10449 /* Ensure that a vector index expression for the lvalue is evaluated
10450 to a temporary if the lvalue symbol is referenced in it. */
10453 for (ref
= lhs
->ref
; ref
; ref
= ref
->next
)
10454 if (ref
->type
== REF_ARRAY
)
10456 for (n
= 0; n
< ref
->u
.ar
.dimen
; n
++)
10457 if (ref
->u
.ar
.dimen_type
[n
] == DIMEN_VECTOR
10458 && gfc_find_sym_in_expr (lhs
->symtree
->n
.sym
,
10459 ref
->u
.ar
.start
[n
]))
10461 = gfc_get_parentheses (ref
->u
.ar
.start
[n
]);
10465 if (gfc_pure (NULL
))
10467 if (lhs
->ts
.type
== BT_DERIVED
10468 && lhs
->expr_type
== EXPR_VARIABLE
10469 && lhs
->ts
.u
.derived
->attr
.pointer_comp
10470 && rhs
->expr_type
== EXPR_VARIABLE
10471 && (gfc_impure_variable (rhs
->symtree
->n
.sym
)
10472 || gfc_is_coindexed (rhs
)))
10474 /* F2008, C1283. */
10475 if (gfc_is_coindexed (rhs
))
10476 gfc_error ("Coindexed expression at %L is assigned to "
10477 "a derived type variable with a POINTER "
10478 "component in a PURE procedure",
10481 gfc_error ("The impure variable at %L is assigned to "
10482 "a derived type variable with a POINTER "
10483 "component in a PURE procedure (12.6)",
10488 /* Fortran 2008, C1283. */
10489 if (gfc_is_coindexed (lhs
))
10491 gfc_error ("Assignment to coindexed variable at %L in a PURE "
10492 "procedure", &rhs
->where
);
10497 if (gfc_implicit_pure (NULL
))
10499 if (lhs
->expr_type
== EXPR_VARIABLE
10500 && lhs
->symtree
->n
.sym
!= gfc_current_ns
->proc_name
10501 && lhs
->symtree
->n
.sym
->ns
!= gfc_current_ns
)
10502 gfc_unset_implicit_pure (NULL
);
10504 if (lhs
->ts
.type
== BT_DERIVED
10505 && lhs
->expr_type
== EXPR_VARIABLE
10506 && lhs
->ts
.u
.derived
->attr
.pointer_comp
10507 && rhs
->expr_type
== EXPR_VARIABLE
10508 && (gfc_impure_variable (rhs
->symtree
->n
.sym
)
10509 || gfc_is_coindexed (rhs
)))
10510 gfc_unset_implicit_pure (NULL
);
10512 /* Fortran 2008, C1283. */
10513 if (gfc_is_coindexed (lhs
))
10514 gfc_unset_implicit_pure (NULL
);
10517 /* F2008, 7.2.1.2. */
10518 attr
= gfc_expr_attr (lhs
);
10519 if (lhs
->ts
.type
== BT_CLASS
&& attr
.allocatable
)
10521 if (attr
.codimension
)
10523 gfc_error ("Assignment to polymorphic coarray at %L is not "
10524 "permitted", &lhs
->where
);
10527 if (!gfc_notify_std (GFC_STD_F2008
, "Assignment to an allocatable "
10528 "polymorphic variable at %L", &lhs
->where
))
10530 if (!flag_realloc_lhs
)
10532 gfc_error ("Assignment to an allocatable polymorphic variable at %L "
10533 "requires %<-frealloc-lhs%>", &lhs
->where
);
10537 else if (lhs
->ts
.type
== BT_CLASS
)
10539 gfc_error ("Nonallocatable variable must not be polymorphic in intrinsic "
10540 "assignment at %L - check that there is a matching specific "
10541 "subroutine for '=' operator", &lhs
->where
);
10545 bool lhs_coindexed
= gfc_is_coindexed (lhs
);
10547 /* F2008, Section 7.2.1.2. */
10548 if (lhs_coindexed
&& gfc_has_ultimate_allocatable (lhs
))
10550 gfc_error ("Coindexed variable must not have an allocatable ultimate "
10551 "component in assignment at %L", &lhs
->where
);
10555 /* Assign the 'data' of a class object to a derived type. */
10556 if (lhs
->ts
.type
== BT_DERIVED
10557 && rhs
->ts
.type
== BT_CLASS
10558 && rhs
->expr_type
!= EXPR_ARRAY
)
10559 gfc_add_data_component (rhs
);
10561 /* Make sure there is a vtable and, in particular, a _copy for the
10563 if (UNLIMITED_POLY (lhs
) && lhs
->rank
&& rhs
->ts
.type
!= BT_CLASS
)
10564 gfc_find_vtab (&rhs
->ts
);
10566 bool caf_convert_to_send
= flag_coarray
== GFC_FCOARRAY_LIB
10568 || (code
->expr2
->expr_type
== EXPR_FUNCTION
10569 && code
->expr2
->value
.function
.isym
10570 && code
->expr2
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
10571 && (code
->expr1
->rank
== 0 || code
->expr2
->rank
!= 0)
10572 && !gfc_expr_attr (rhs
).allocatable
10573 && !gfc_has_vector_subscript (rhs
)));
10575 gfc_check_assign (lhs
, rhs
, 1, !caf_convert_to_send
);
10577 /* Insert a GFC_ISYM_CAF_SEND intrinsic, when the LHS is a coindexed variable.
10578 Additionally, insert this code when the RHS is a CAF as we then use the
10579 GFC_ISYM_CAF_SEND intrinsic just to avoid a temporary; but do not do so if
10580 the LHS is (re)allocatable or has a vector subscript. If the LHS is a
10581 noncoindexed array and the RHS is a coindexed scalar, use the normal code
10583 if (caf_convert_to_send
)
10585 if (code
->expr2
->expr_type
== EXPR_FUNCTION
10586 && code
->expr2
->value
.function
.isym
10587 && code
->expr2
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
)
10588 remove_caf_get_intrinsic (code
->expr2
);
10589 code
->op
= EXEC_CALL
;
10590 gfc_get_sym_tree (GFC_PREFIX ("caf_send"), ns
, &code
->symtree
, true);
10591 code
->resolved_sym
= code
->symtree
->n
.sym
;
10592 code
->resolved_sym
->attr
.flavor
= FL_PROCEDURE
;
10593 code
->resolved_sym
->attr
.intrinsic
= 1;
10594 code
->resolved_sym
->attr
.subroutine
= 1;
10595 code
->resolved_isym
= gfc_intrinsic_subroutine_by_id (GFC_ISYM_CAF_SEND
);
10596 gfc_commit_symbol (code
->resolved_sym
);
10597 code
->ext
.actual
= gfc_get_actual_arglist ();
10598 code
->ext
.actual
->expr
= lhs
;
10599 code
->ext
.actual
->next
= gfc_get_actual_arglist ();
10600 code
->ext
.actual
->next
->expr
= rhs
;
10601 code
->expr1
= NULL
;
10602 code
->expr2
= NULL
;
10609 /* Add a component reference onto an expression. */
10612 add_comp_ref (gfc_expr
*e
, gfc_component
*c
)
10617 ref
= &((*ref
)->next
);
10618 *ref
= gfc_get_ref ();
10619 (*ref
)->type
= REF_COMPONENT
;
10620 (*ref
)->u
.c
.sym
= e
->ts
.u
.derived
;
10621 (*ref
)->u
.c
.component
= c
;
10624 /* Add a full array ref, as necessary. */
10627 gfc_add_full_array_ref (e
, c
->as
);
10628 e
->rank
= c
->as
->rank
;
10633 /* Build an assignment. Keep the argument 'op' for future use, so that
10634 pointer assignments can be made. */
10637 build_assignment (gfc_exec_op op
, gfc_expr
*expr1
, gfc_expr
*expr2
,
10638 gfc_component
*comp1
, gfc_component
*comp2
, locus loc
)
10640 gfc_code
*this_code
;
10642 this_code
= gfc_get_code (op
);
10643 this_code
->next
= NULL
;
10644 this_code
->expr1
= gfc_copy_expr (expr1
);
10645 this_code
->expr2
= gfc_copy_expr (expr2
);
10646 this_code
->loc
= loc
;
10647 if (comp1
&& comp2
)
10649 add_comp_ref (this_code
->expr1
, comp1
);
10650 add_comp_ref (this_code
->expr2
, comp2
);
10657 /* Makes a temporary variable expression based on the characteristics of
10658 a given variable expression. */
10661 get_temp_from_expr (gfc_expr
*e
, gfc_namespace
*ns
)
10663 static int serial
= 0;
10664 char name
[GFC_MAX_SYMBOL_LEN
];
10666 gfc_array_spec
*as
;
10667 gfc_array_ref
*aref
;
10670 sprintf (name
, GFC_PREFIX("DA%d"), serial
++);
10671 gfc_get_sym_tree (name
, ns
, &tmp
, false);
10672 gfc_add_type (tmp
->n
.sym
, &e
->ts
, NULL
);
10674 if (e
->expr_type
== EXPR_CONSTANT
&& e
->ts
.type
== BT_CHARACTER
)
10675 tmp
->n
.sym
->ts
.u
.cl
->length
= gfc_get_int_expr (gfc_charlen_int_kind
,
10677 e
->value
.character
.length
);
10683 /* Obtain the arrayspec for the temporary. */
10684 if (e
->rank
&& e
->expr_type
!= EXPR_ARRAY
10685 && e
->expr_type
!= EXPR_FUNCTION
10686 && e
->expr_type
!= EXPR_OP
)
10688 aref
= gfc_find_array_ref (e
);
10689 if (e
->expr_type
== EXPR_VARIABLE
10690 && e
->symtree
->n
.sym
->as
== aref
->as
)
10694 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
10695 if (ref
->type
== REF_COMPONENT
10696 && ref
->u
.c
.component
->as
== aref
->as
)
10704 /* Add the attributes and the arrayspec to the temporary. */
10705 tmp
->n
.sym
->attr
= gfc_expr_attr (e
);
10706 tmp
->n
.sym
->attr
.function
= 0;
10707 tmp
->n
.sym
->attr
.result
= 0;
10708 tmp
->n
.sym
->attr
.flavor
= FL_VARIABLE
;
10709 tmp
->n
.sym
->attr
.dummy
= 0;
10710 tmp
->n
.sym
->attr
.intent
= INTENT_UNKNOWN
;
10714 tmp
->n
.sym
->as
= gfc_copy_array_spec (as
);
10717 if (as
->type
== AS_DEFERRED
)
10718 tmp
->n
.sym
->attr
.allocatable
= 1;
10720 else if (e
->rank
&& (e
->expr_type
== EXPR_ARRAY
10721 || e
->expr_type
== EXPR_FUNCTION
10722 || e
->expr_type
== EXPR_OP
))
10724 tmp
->n
.sym
->as
= gfc_get_array_spec ();
10725 tmp
->n
.sym
->as
->type
= AS_DEFERRED
;
10726 tmp
->n
.sym
->as
->rank
= e
->rank
;
10727 tmp
->n
.sym
->attr
.allocatable
= 1;
10728 tmp
->n
.sym
->attr
.dimension
= 1;
10731 tmp
->n
.sym
->attr
.dimension
= 0;
10733 gfc_set_sym_referenced (tmp
->n
.sym
);
10734 gfc_commit_symbol (tmp
->n
.sym
);
10735 e
= gfc_lval_expr_from_sym (tmp
->n
.sym
);
10737 /* Should the lhs be a section, use its array ref for the
10738 temporary expression. */
10739 if (aref
&& aref
->type
!= AR_FULL
)
10741 gfc_free_ref_list (e
->ref
);
10742 e
->ref
= gfc_copy_ref (ref
);
10748 /* Add one line of code to the code chain, making sure that 'head' and
10749 'tail' are appropriately updated. */
10752 add_code_to_chain (gfc_code
**this_code
, gfc_code
**head
, gfc_code
**tail
)
10754 gcc_assert (this_code
);
10756 *head
= *tail
= *this_code
;
10758 *tail
= gfc_append_code (*tail
, *this_code
);
10763 /* Counts the potential number of part array references that would
10764 result from resolution of typebound defined assignments. */
10767 nonscalar_typebound_assign (gfc_symbol
*derived
, int depth
)
10770 int c_depth
= 0, t_depth
;
10772 for (c
= derived
->components
; c
; c
= c
->next
)
10774 if ((!gfc_bt_struct (c
->ts
.type
)
10776 || c
->attr
.allocatable
10777 || c
->attr
.proc_pointer_comp
10778 || c
->attr
.class_pointer
10779 || c
->attr
.proc_pointer
)
10780 && !c
->attr
.defined_assign_comp
)
10783 if (c
->as
&& c_depth
== 0)
10786 if (c
->ts
.u
.derived
->attr
.defined_assign_comp
)
10787 t_depth
= nonscalar_typebound_assign (c
->ts
.u
.derived
,
10792 c_depth
= t_depth
> c_depth
? t_depth
: c_depth
;
10794 return depth
+ c_depth
;
10798 /* Implement 7.2.1.3 of the F08 standard:
10799 "An intrinsic assignment where the variable is of derived type is
10800 performed as if each component of the variable were assigned from the
10801 corresponding component of expr using pointer assignment (7.2.2) for
10802 each pointer component, defined assignment for each nonpointer
10803 nonallocatable component of a type that has a type-bound defined
10804 assignment consistent with the component, intrinsic assignment for
10805 each other nonpointer nonallocatable component, ..."
10807 The pointer assignments are taken care of by the intrinsic
10808 assignment of the structure itself. This function recursively adds
10809 defined assignments where required. The recursion is accomplished
10810 by calling gfc_resolve_code.
10812 When the lhs in a defined assignment has intent INOUT, we need a
10813 temporary for the lhs. In pseudo-code:
10815 ! Only call function lhs once.
10816 if (lhs is not a constant or an variable)
10819 ! Do the intrinsic assignment
10821 ! Now do the defined assignments
10822 do over components with typebound defined assignment [%cmp]
10823 #if one component's assignment procedure is INOUT
10825 #if expr2 non-variable
10831 t1%cmp {defined=} expr2%cmp
10837 expr1%cmp {defined=} expr2%cmp
10841 /* The temporary assignments have to be put on top of the additional
10842 code to avoid the result being changed by the intrinsic assignment.
10844 static int component_assignment_level
= 0;
10845 static gfc_code
*tmp_head
= NULL
, *tmp_tail
= NULL
;
10848 generate_component_assignments (gfc_code
**code
, gfc_namespace
*ns
)
10850 gfc_component
*comp1
, *comp2
;
10851 gfc_code
*this_code
= NULL
, *head
= NULL
, *tail
= NULL
;
10853 int error_count
, depth
;
10855 gfc_get_errors (NULL
, &error_count
);
10857 /* Filter out continuing processing after an error. */
10859 || (*code
)->expr1
->ts
.type
!= BT_DERIVED
10860 || (*code
)->expr2
->ts
.type
!= BT_DERIVED
)
10863 /* TODO: Handle more than one part array reference in assignments. */
10864 depth
= nonscalar_typebound_assign ((*code
)->expr1
->ts
.u
.derived
,
10865 (*code
)->expr1
->rank
? 1 : 0);
10868 gfc_warning (0, "TODO: type-bound defined assignment(s) at %L not "
10869 "done because multiple part array references would "
10870 "occur in intermediate expressions.", &(*code
)->loc
);
10874 component_assignment_level
++;
10876 /* Create a temporary so that functions get called only once. */
10877 if ((*code
)->expr2
->expr_type
!= EXPR_VARIABLE
10878 && (*code
)->expr2
->expr_type
!= EXPR_CONSTANT
)
10880 gfc_expr
*tmp_expr
;
10882 /* Assign the rhs to the temporary. */
10883 tmp_expr
= get_temp_from_expr ((*code
)->expr1
, ns
);
10884 this_code
= build_assignment (EXEC_ASSIGN
,
10885 tmp_expr
, (*code
)->expr2
,
10886 NULL
, NULL
, (*code
)->loc
);
10887 /* Add the code and substitute the rhs expression. */
10888 add_code_to_chain (&this_code
, &tmp_head
, &tmp_tail
);
10889 gfc_free_expr ((*code
)->expr2
);
10890 (*code
)->expr2
= tmp_expr
;
10893 /* Do the intrinsic assignment. This is not needed if the lhs is one
10894 of the temporaries generated here, since the intrinsic assignment
10895 to the final result already does this. */
10896 if ((*code
)->expr1
->symtree
->n
.sym
->name
[2] != '@')
10898 this_code
= build_assignment (EXEC_ASSIGN
,
10899 (*code
)->expr1
, (*code
)->expr2
,
10900 NULL
, NULL
, (*code
)->loc
);
10901 add_code_to_chain (&this_code
, &head
, &tail
);
10904 comp1
= (*code
)->expr1
->ts
.u
.derived
->components
;
10905 comp2
= (*code
)->expr2
->ts
.u
.derived
->components
;
10908 for (; comp1
; comp1
= comp1
->next
, comp2
= comp2
->next
)
10910 bool inout
= false;
10912 /* The intrinsic assignment does the right thing for pointers
10913 of all kinds and allocatable components. */
10914 if (!gfc_bt_struct (comp1
->ts
.type
)
10915 || comp1
->attr
.pointer
10916 || comp1
->attr
.allocatable
10917 || comp1
->attr
.proc_pointer_comp
10918 || comp1
->attr
.class_pointer
10919 || comp1
->attr
.proc_pointer
)
10922 /* Make an assigment for this component. */
10923 this_code
= build_assignment (EXEC_ASSIGN
,
10924 (*code
)->expr1
, (*code
)->expr2
,
10925 comp1
, comp2
, (*code
)->loc
);
10927 /* Convert the assignment if there is a defined assignment for
10928 this type. Otherwise, using the call from gfc_resolve_code,
10929 recurse into its components. */
10930 gfc_resolve_code (this_code
, ns
);
10932 if (this_code
->op
== EXEC_ASSIGN_CALL
)
10934 gfc_formal_arglist
*dummy_args
;
10936 /* Check that there is a typebound defined assignment. If not,
10937 then this must be a module defined assignment. We cannot
10938 use the defined_assign_comp attribute here because it must
10939 be this derived type that has the defined assignment and not
10941 if (!(comp1
->ts
.u
.derived
->f2k_derived
10942 && comp1
->ts
.u
.derived
->f2k_derived
10943 ->tb_op
[INTRINSIC_ASSIGN
]))
10945 gfc_free_statements (this_code
);
10950 /* If the first argument of the subroutine has intent INOUT
10951 a temporary must be generated and used instead. */
10952 rsym
= this_code
->resolved_sym
;
10953 dummy_args
= gfc_sym_get_dummy_args (rsym
);
10955 && dummy_args
->sym
->attr
.intent
== INTENT_INOUT
)
10957 gfc_code
*temp_code
;
10960 /* Build the temporary required for the assignment and put
10961 it at the head of the generated code. */
10964 t1
= get_temp_from_expr ((*code
)->expr1
, ns
);
10965 temp_code
= build_assignment (EXEC_ASSIGN
,
10966 t1
, (*code
)->expr1
,
10967 NULL
, NULL
, (*code
)->loc
);
10969 /* For allocatable LHS, check whether it is allocated. Note
10970 that allocatable components with defined assignment are
10971 not yet support. See PR 57696. */
10972 if ((*code
)->expr1
->symtree
->n
.sym
->attr
.allocatable
)
10976 gfc_lval_expr_from_sym ((*code
)->expr1
->symtree
->n
.sym
);
10977 block
= gfc_get_code (EXEC_IF
);
10978 block
->block
= gfc_get_code (EXEC_IF
);
10979 block
->block
->expr1
10980 = gfc_build_intrinsic_call (ns
,
10981 GFC_ISYM_ALLOCATED
, "allocated",
10982 (*code
)->loc
, 1, e
);
10983 block
->block
->next
= temp_code
;
10986 add_code_to_chain (&temp_code
, &tmp_head
, &tmp_tail
);
10989 /* Replace the first actual arg with the component of the
10991 gfc_free_expr (this_code
->ext
.actual
->expr
);
10992 this_code
->ext
.actual
->expr
= gfc_copy_expr (t1
);
10993 add_comp_ref (this_code
->ext
.actual
->expr
, comp1
);
10995 /* If the LHS variable is allocatable and wasn't allocated and
10996 the temporary is allocatable, pointer assign the address of
10997 the freshly allocated LHS to the temporary. */
10998 if ((*code
)->expr1
->symtree
->n
.sym
->attr
.allocatable
10999 && gfc_expr_attr ((*code
)->expr1
).allocatable
)
11004 cond
= gfc_get_expr ();
11005 cond
->ts
.type
= BT_LOGICAL
;
11006 cond
->ts
.kind
= gfc_default_logical_kind
;
11007 cond
->expr_type
= EXPR_OP
;
11008 cond
->where
= (*code
)->loc
;
11009 cond
->value
.op
.op
= INTRINSIC_NOT
;
11010 cond
->value
.op
.op1
= gfc_build_intrinsic_call (ns
,
11011 GFC_ISYM_ALLOCATED
, "allocated",
11012 (*code
)->loc
, 1, gfc_copy_expr (t1
));
11013 block
= gfc_get_code (EXEC_IF
);
11014 block
->block
= gfc_get_code (EXEC_IF
);
11015 block
->block
->expr1
= cond
;
11016 block
->block
->next
= build_assignment (EXEC_POINTER_ASSIGN
,
11017 t1
, (*code
)->expr1
,
11018 NULL
, NULL
, (*code
)->loc
);
11019 add_code_to_chain (&block
, &head
, &tail
);
11023 else if (this_code
->op
== EXEC_ASSIGN
&& !this_code
->next
)
11025 /* Don't add intrinsic assignments since they are already
11026 effected by the intrinsic assignment of the structure. */
11027 gfc_free_statements (this_code
);
11032 add_code_to_chain (&this_code
, &head
, &tail
);
11036 /* Transfer the value to the final result. */
11037 this_code
= build_assignment (EXEC_ASSIGN
,
11038 (*code
)->expr1
, t1
,
11039 comp1
, comp2
, (*code
)->loc
);
11040 add_code_to_chain (&this_code
, &head
, &tail
);
11044 /* Put the temporary assignments at the top of the generated code. */
11045 if (tmp_head
&& component_assignment_level
== 1)
11047 gfc_append_code (tmp_head
, head
);
11049 tmp_head
= tmp_tail
= NULL
;
11052 // If we did a pointer assignment - thus, we need to ensure that the LHS is
11053 // not accidentally deallocated. Hence, nullify t1.
11054 if (t1
&& (*code
)->expr1
->symtree
->n
.sym
->attr
.allocatable
11055 && gfc_expr_attr ((*code
)->expr1
).allocatable
)
11061 e
= gfc_lval_expr_from_sym ((*code
)->expr1
->symtree
->n
.sym
);
11062 cond
= gfc_build_intrinsic_call (ns
, GFC_ISYM_ASSOCIATED
, "associated",
11063 (*code
)->loc
, 2, gfc_copy_expr (t1
), e
);
11064 block
= gfc_get_code (EXEC_IF
);
11065 block
->block
= gfc_get_code (EXEC_IF
);
11066 block
->block
->expr1
= cond
;
11067 block
->block
->next
= build_assignment (EXEC_POINTER_ASSIGN
,
11068 t1
, gfc_get_null_expr (&(*code
)->loc
),
11069 NULL
, NULL
, (*code
)->loc
);
11070 gfc_append_code (tail
, block
);
11074 /* Now attach the remaining code chain to the input code. Step on
11075 to the end of the new code since resolution is complete. */
11076 gcc_assert ((*code
)->op
== EXEC_ASSIGN
);
11077 tail
->next
= (*code
)->next
;
11078 /* Overwrite 'code' because this would place the intrinsic assignment
11079 before the temporary for the lhs is created. */
11080 gfc_free_expr ((*code
)->expr1
);
11081 gfc_free_expr ((*code
)->expr2
);
11087 component_assignment_level
--;
11091 /* F2008: Pointer function assignments are of the form:
11092 ptr_fcn (args) = expr
11093 This function breaks these assignments into two statements:
11094 temporary_pointer => ptr_fcn(args)
11095 temporary_pointer = expr */
11098 resolve_ptr_fcn_assign (gfc_code
**code
, gfc_namespace
*ns
)
11100 gfc_expr
*tmp_ptr_expr
;
11101 gfc_code
*this_code
;
11102 gfc_component
*comp
;
11105 if ((*code
)->expr1
->expr_type
!= EXPR_FUNCTION
)
11108 /* Even if standard does not support this feature, continue to build
11109 the two statements to avoid upsetting frontend_passes.c. */
11110 gfc_notify_std (GFC_STD_F2008
, "Pointer procedure assignment at "
11111 "%L", &(*code
)->loc
);
11113 comp
= gfc_get_proc_ptr_comp ((*code
)->expr1
);
11116 s
= comp
->ts
.interface
;
11118 s
= (*code
)->expr1
->symtree
->n
.sym
;
11120 if (s
== NULL
|| !s
->result
->attr
.pointer
)
11122 gfc_error ("The function result on the lhs of the assignment at "
11123 "%L must have the pointer attribute.",
11124 &(*code
)->expr1
->where
);
11125 (*code
)->op
= EXEC_NOP
;
11129 tmp_ptr_expr
= get_temp_from_expr ((*code
)->expr2
, ns
);
11131 /* get_temp_from_expression is set up for ordinary assignments. To that
11132 end, where array bounds are not known, arrays are made allocatable.
11133 Change the temporary to a pointer here. */
11134 tmp_ptr_expr
->symtree
->n
.sym
->attr
.pointer
= 1;
11135 tmp_ptr_expr
->symtree
->n
.sym
->attr
.allocatable
= 0;
11136 tmp_ptr_expr
->where
= (*code
)->loc
;
11138 this_code
= build_assignment (EXEC_ASSIGN
,
11139 tmp_ptr_expr
, (*code
)->expr2
,
11140 NULL
, NULL
, (*code
)->loc
);
11141 this_code
->next
= (*code
)->next
;
11142 (*code
)->next
= this_code
;
11143 (*code
)->op
= EXEC_POINTER_ASSIGN
;
11144 (*code
)->expr2
= (*code
)->expr1
;
11145 (*code
)->expr1
= tmp_ptr_expr
;
11151 /* Deferred character length assignments from an operator expression
11152 require a temporary because the character length of the lhs can
11153 change in the course of the assignment. */
11156 deferred_op_assign (gfc_code
**code
, gfc_namespace
*ns
)
11158 gfc_expr
*tmp_expr
;
11159 gfc_code
*this_code
;
11161 if (!((*code
)->expr1
->ts
.type
== BT_CHARACTER
11162 && (*code
)->expr1
->ts
.deferred
&& (*code
)->expr1
->rank
11163 && (*code
)->expr2
->expr_type
== EXPR_OP
))
11166 if (!gfc_check_dependency ((*code
)->expr1
, (*code
)->expr2
, 1))
11169 if (gfc_expr_attr ((*code
)->expr1
).pointer
)
11172 tmp_expr
= get_temp_from_expr ((*code
)->expr1
, ns
);
11173 tmp_expr
->where
= (*code
)->loc
;
11175 /* A new charlen is required to ensure that the variable string
11176 length is different to that of the original lhs. */
11177 tmp_expr
->ts
.u
.cl
= gfc_get_charlen();
11178 tmp_expr
->symtree
->n
.sym
->ts
.u
.cl
= tmp_expr
->ts
.u
.cl
;
11179 tmp_expr
->ts
.u
.cl
->next
= (*code
)->expr2
->ts
.u
.cl
->next
;
11180 (*code
)->expr2
->ts
.u
.cl
->next
= tmp_expr
->ts
.u
.cl
;
11182 tmp_expr
->symtree
->n
.sym
->ts
.deferred
= 1;
11184 this_code
= build_assignment (EXEC_ASSIGN
,
11186 gfc_copy_expr (tmp_expr
),
11187 NULL
, NULL
, (*code
)->loc
);
11189 (*code
)->expr1
= tmp_expr
;
11191 this_code
->next
= (*code
)->next
;
11192 (*code
)->next
= this_code
;
11198 /* Given a block of code, recursively resolve everything pointed to by this
11202 gfc_resolve_code (gfc_code
*code
, gfc_namespace
*ns
)
11204 int omp_workshare_save
;
11205 int forall_save
, do_concurrent_save
;
11209 frame
.prev
= cs_base
;
11213 find_reachable_labels (code
);
11215 for (; code
; code
= code
->next
)
11217 frame
.current
= code
;
11218 forall_save
= forall_flag
;
11219 do_concurrent_save
= gfc_do_concurrent_flag
;
11221 if (code
->op
== EXEC_FORALL
)
11224 gfc_resolve_forall (code
, ns
, forall_save
);
11227 else if (code
->block
)
11229 omp_workshare_save
= -1;
11232 case EXEC_OACC_PARALLEL_LOOP
:
11233 case EXEC_OACC_PARALLEL
:
11234 case EXEC_OACC_KERNELS_LOOP
:
11235 case EXEC_OACC_KERNELS
:
11236 case EXEC_OACC_DATA
:
11237 case EXEC_OACC_HOST_DATA
:
11238 case EXEC_OACC_LOOP
:
11239 gfc_resolve_oacc_blocks (code
, ns
);
11241 case EXEC_OMP_PARALLEL_WORKSHARE
:
11242 omp_workshare_save
= omp_workshare_flag
;
11243 omp_workshare_flag
= 1;
11244 gfc_resolve_omp_parallel_blocks (code
, ns
);
11246 case EXEC_OMP_PARALLEL
:
11247 case EXEC_OMP_PARALLEL_DO
:
11248 case EXEC_OMP_PARALLEL_DO_SIMD
:
11249 case EXEC_OMP_PARALLEL_SECTIONS
:
11250 case EXEC_OMP_TARGET_PARALLEL
:
11251 case EXEC_OMP_TARGET_PARALLEL_DO
:
11252 case EXEC_OMP_TARGET_PARALLEL_DO_SIMD
:
11253 case EXEC_OMP_TARGET_TEAMS
:
11254 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE
:
11255 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO
:
11256 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
11257 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_SIMD
:
11258 case EXEC_OMP_TASK
:
11259 case EXEC_OMP_TASKLOOP
:
11260 case EXEC_OMP_TASKLOOP_SIMD
:
11261 case EXEC_OMP_TEAMS
:
11262 case EXEC_OMP_TEAMS_DISTRIBUTE
:
11263 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO
:
11264 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
11265 case EXEC_OMP_TEAMS_DISTRIBUTE_SIMD
:
11266 omp_workshare_save
= omp_workshare_flag
;
11267 omp_workshare_flag
= 0;
11268 gfc_resolve_omp_parallel_blocks (code
, ns
);
11270 case EXEC_OMP_DISTRIBUTE
:
11271 case EXEC_OMP_DISTRIBUTE_SIMD
:
11273 case EXEC_OMP_DO_SIMD
:
11274 case EXEC_OMP_SIMD
:
11275 case EXEC_OMP_TARGET_SIMD
:
11276 gfc_resolve_omp_do_blocks (code
, ns
);
11278 case EXEC_SELECT_TYPE
:
11279 /* Blocks are handled in resolve_select_type because we have
11280 to transform the SELECT TYPE into ASSOCIATE first. */
11282 case EXEC_DO_CONCURRENT
:
11283 gfc_do_concurrent_flag
= 1;
11284 gfc_resolve_blocks (code
->block
, ns
);
11285 gfc_do_concurrent_flag
= 2;
11287 case EXEC_OMP_WORKSHARE
:
11288 omp_workshare_save
= omp_workshare_flag
;
11289 omp_workshare_flag
= 1;
11292 gfc_resolve_blocks (code
->block
, ns
);
11296 if (omp_workshare_save
!= -1)
11297 omp_workshare_flag
= omp_workshare_save
;
11301 if (code
->op
!= EXEC_COMPCALL
&& code
->op
!= EXEC_CALL_PPC
)
11302 t
= gfc_resolve_expr (code
->expr1
);
11303 forall_flag
= forall_save
;
11304 gfc_do_concurrent_flag
= do_concurrent_save
;
11306 if (!gfc_resolve_expr (code
->expr2
))
11309 if (code
->op
== EXEC_ALLOCATE
11310 && !gfc_resolve_expr (code
->expr3
))
11316 case EXEC_END_BLOCK
:
11317 case EXEC_END_NESTED_BLOCK
:
11321 case EXEC_ERROR_STOP
:
11323 case EXEC_CONTINUE
:
11325 case EXEC_ASSIGN_CALL
:
11328 case EXEC_CRITICAL
:
11329 resolve_critical (code
);
11332 case EXEC_SYNC_ALL
:
11333 case EXEC_SYNC_IMAGES
:
11334 case EXEC_SYNC_MEMORY
:
11335 resolve_sync (code
);
11340 case EXEC_EVENT_POST
:
11341 case EXEC_EVENT_WAIT
:
11342 resolve_lock_unlock_event (code
);
11345 case EXEC_FAIL_IMAGE
:
11346 case EXEC_FORM_TEAM
:
11347 case EXEC_CHANGE_TEAM
:
11348 case EXEC_END_TEAM
:
11349 case EXEC_SYNC_TEAM
:
11353 /* Keep track of which entry we are up to. */
11354 current_entry_id
= code
->ext
.entry
->id
;
11358 resolve_where (code
, NULL
);
11362 if (code
->expr1
!= NULL
)
11364 if (code
->expr1
->ts
.type
!= BT_INTEGER
)
11365 gfc_error ("ASSIGNED GOTO statement at %L requires an "
11366 "INTEGER variable", &code
->expr1
->where
);
11367 else if (code
->expr1
->symtree
->n
.sym
->attr
.assign
!= 1)
11368 gfc_error ("Variable %qs has not been assigned a target "
11369 "label at %L", code
->expr1
->symtree
->n
.sym
->name
,
11370 &code
->expr1
->where
);
11373 resolve_branch (code
->label1
, code
);
11377 if (code
->expr1
!= NULL
11378 && (code
->expr1
->ts
.type
!= BT_INTEGER
|| code
->expr1
->rank
))
11379 gfc_error ("Alternate RETURN statement at %L requires a SCALAR-"
11380 "INTEGER return specifier", &code
->expr1
->where
);
11383 case EXEC_INIT_ASSIGN
:
11384 case EXEC_END_PROCEDURE
:
11391 /* Remove a GFC_ISYM_CAF_GET inserted for a coindexed variable on
11393 if (code
->expr1
->expr_type
== EXPR_FUNCTION
11394 && code
->expr1
->value
.function
.isym
11395 && code
->expr1
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
)
11396 remove_caf_get_intrinsic (code
->expr1
);
11398 /* If this is a pointer function in an lvalue variable context,
11399 the new code will have to be resolved afresh. This is also the
11400 case with an error, where the code is transformed into NOP to
11401 prevent ICEs downstream. */
11402 if (resolve_ptr_fcn_assign (&code
, ns
)
11403 || code
->op
== EXEC_NOP
)
11406 if (!gfc_check_vardef_context (code
->expr1
, false, false, false,
11410 if (resolve_ordinary_assign (code
, ns
))
11412 if (code
->op
== EXEC_COMPCALL
)
11418 /* Check for dependencies in deferred character length array
11419 assignments and generate a temporary, if necessary. */
11420 if (code
->op
== EXEC_ASSIGN
&& deferred_op_assign (&code
, ns
))
11423 /* F03 7.4.1.3 for non-allocatable, non-pointer components. */
11424 if (code
->op
!= EXEC_CALL
&& code
->expr1
->ts
.type
== BT_DERIVED
11425 && code
->expr1
->ts
.u
.derived
11426 && code
->expr1
->ts
.u
.derived
->attr
.defined_assign_comp
)
11427 generate_component_assignments (&code
, ns
);
11431 case EXEC_LABEL_ASSIGN
:
11432 if (code
->label1
->defined
== ST_LABEL_UNKNOWN
)
11433 gfc_error ("Label %d referenced at %L is never defined",
11434 code
->label1
->value
, &code
->label1
->where
);
11436 && (code
->expr1
->expr_type
!= EXPR_VARIABLE
11437 || code
->expr1
->symtree
->n
.sym
->ts
.type
!= BT_INTEGER
11438 || code
->expr1
->symtree
->n
.sym
->ts
.kind
11439 != gfc_default_integer_kind
11440 || code
->expr1
->symtree
->n
.sym
->as
!= NULL
))
11441 gfc_error ("ASSIGN statement at %L requires a scalar "
11442 "default INTEGER variable", &code
->expr1
->where
);
11445 case EXEC_POINTER_ASSIGN
:
11452 /* This is both a variable definition and pointer assignment
11453 context, so check both of them. For rank remapping, a final
11454 array ref may be present on the LHS and fool gfc_expr_attr
11455 used in gfc_check_vardef_context. Remove it. */
11456 e
= remove_last_array_ref (code
->expr1
);
11457 t
= gfc_check_vardef_context (e
, true, false, false,
11458 _("pointer assignment"));
11460 t
= gfc_check_vardef_context (e
, false, false, false,
11461 _("pointer assignment"));
11464 t
= gfc_check_pointer_assign (code
->expr1
, code
->expr2
, !t
) && t
;
11469 /* Assigning a class object always is a regular assign. */
11470 if (code
->expr2
->ts
.type
== BT_CLASS
11471 && code
->expr1
->ts
.type
== BT_CLASS
11472 && !CLASS_DATA (code
->expr2
)->attr
.dimension
11473 && !(gfc_expr_attr (code
->expr1
).proc_pointer
11474 && code
->expr2
->expr_type
== EXPR_VARIABLE
11475 && code
->expr2
->symtree
->n
.sym
->attr
.flavor
11477 code
->op
= EXEC_ASSIGN
;
11481 case EXEC_ARITHMETIC_IF
:
11483 gfc_expr
*e
= code
->expr1
;
11485 gfc_resolve_expr (e
);
11486 if (e
->expr_type
== EXPR_NULL
)
11487 gfc_error ("Invalid NULL at %L", &e
->where
);
11489 if (t
&& (e
->rank
> 0
11490 || !(e
->ts
.type
== BT_REAL
|| e
->ts
.type
== BT_INTEGER
)))
11491 gfc_error ("Arithmetic IF statement at %L requires a scalar "
11492 "REAL or INTEGER expression", &e
->where
);
11494 resolve_branch (code
->label1
, code
);
11495 resolve_branch (code
->label2
, code
);
11496 resolve_branch (code
->label3
, code
);
11501 if (t
&& code
->expr1
!= NULL
11502 && (code
->expr1
->ts
.type
!= BT_LOGICAL
11503 || code
->expr1
->rank
!= 0))
11504 gfc_error ("IF clause at %L requires a scalar LOGICAL expression",
11505 &code
->expr1
->where
);
11510 resolve_call (code
);
11513 case EXEC_COMPCALL
:
11515 resolve_typebound_subroutine (code
);
11518 case EXEC_CALL_PPC
:
11519 resolve_ppc_call (code
);
11523 /* Select is complicated. Also, a SELECT construct could be
11524 a transformed computed GOTO. */
11525 resolve_select (code
, false);
11528 case EXEC_SELECT_TYPE
:
11529 resolve_select_type (code
, ns
);
11533 resolve_block_construct (code
);
11537 if (code
->ext
.iterator
!= NULL
)
11539 gfc_iterator
*iter
= code
->ext
.iterator
;
11540 if (gfc_resolve_iterator (iter
, true, false))
11541 gfc_resolve_do_iterator (code
, iter
->var
->symtree
->n
.sym
,
11546 case EXEC_DO_WHILE
:
11547 if (code
->expr1
== NULL
)
11548 gfc_internal_error ("gfc_resolve_code(): No expression on "
11551 && (code
->expr1
->rank
!= 0
11552 || code
->expr1
->ts
.type
!= BT_LOGICAL
))
11553 gfc_error ("Exit condition of DO WHILE loop at %L must be "
11554 "a scalar LOGICAL expression", &code
->expr1
->where
);
11557 case EXEC_ALLOCATE
:
11559 resolve_allocate_deallocate (code
, "ALLOCATE");
11563 case EXEC_DEALLOCATE
:
11565 resolve_allocate_deallocate (code
, "DEALLOCATE");
11570 if (!gfc_resolve_open (code
->ext
.open
))
11573 resolve_branch (code
->ext
.open
->err
, code
);
11577 if (!gfc_resolve_close (code
->ext
.close
))
11580 resolve_branch (code
->ext
.close
->err
, code
);
11583 case EXEC_BACKSPACE
:
11587 if (!gfc_resolve_filepos (code
->ext
.filepos
, &code
->loc
))
11590 resolve_branch (code
->ext
.filepos
->err
, code
);
11594 if (!gfc_resolve_inquire (code
->ext
.inquire
))
11597 resolve_branch (code
->ext
.inquire
->err
, code
);
11600 case EXEC_IOLENGTH
:
11601 gcc_assert (code
->ext
.inquire
!= NULL
);
11602 if (!gfc_resolve_inquire (code
->ext
.inquire
))
11605 resolve_branch (code
->ext
.inquire
->err
, code
);
11609 if (!gfc_resolve_wait (code
->ext
.wait
))
11612 resolve_branch (code
->ext
.wait
->err
, code
);
11613 resolve_branch (code
->ext
.wait
->end
, code
);
11614 resolve_branch (code
->ext
.wait
->eor
, code
);
11619 if (!gfc_resolve_dt (code
->ext
.dt
, &code
->loc
))
11622 resolve_branch (code
->ext
.dt
->err
, code
);
11623 resolve_branch (code
->ext
.dt
->end
, code
);
11624 resolve_branch (code
->ext
.dt
->eor
, code
);
11627 case EXEC_TRANSFER
:
11628 resolve_transfer (code
);
11631 case EXEC_DO_CONCURRENT
:
11633 resolve_forall_iterators (code
->ext
.forall_iterator
);
11635 if (code
->expr1
!= NULL
11636 && (code
->expr1
->ts
.type
!= BT_LOGICAL
|| code
->expr1
->rank
))
11637 gfc_error ("FORALL mask clause at %L requires a scalar LOGICAL "
11638 "expression", &code
->expr1
->where
);
11641 case EXEC_OACC_PARALLEL_LOOP
:
11642 case EXEC_OACC_PARALLEL
:
11643 case EXEC_OACC_KERNELS_LOOP
:
11644 case EXEC_OACC_KERNELS
:
11645 case EXEC_OACC_DATA
:
11646 case EXEC_OACC_HOST_DATA
:
11647 case EXEC_OACC_LOOP
:
11648 case EXEC_OACC_UPDATE
:
11649 case EXEC_OACC_WAIT
:
11650 case EXEC_OACC_CACHE
:
11651 case EXEC_OACC_ENTER_DATA
:
11652 case EXEC_OACC_EXIT_DATA
:
11653 case EXEC_OACC_ATOMIC
:
11654 case EXEC_OACC_DECLARE
:
11655 gfc_resolve_oacc_directive (code
, ns
);
11658 case EXEC_OMP_ATOMIC
:
11659 case EXEC_OMP_BARRIER
:
11660 case EXEC_OMP_CANCEL
:
11661 case EXEC_OMP_CANCELLATION_POINT
:
11662 case EXEC_OMP_CRITICAL
:
11663 case EXEC_OMP_FLUSH
:
11664 case EXEC_OMP_DISTRIBUTE
:
11665 case EXEC_OMP_DISTRIBUTE_PARALLEL_DO
:
11666 case EXEC_OMP_DISTRIBUTE_PARALLEL_DO_SIMD
:
11667 case EXEC_OMP_DISTRIBUTE_SIMD
:
11669 case EXEC_OMP_DO_SIMD
:
11670 case EXEC_OMP_MASTER
:
11671 case EXEC_OMP_ORDERED
:
11672 case EXEC_OMP_SECTIONS
:
11673 case EXEC_OMP_SIMD
:
11674 case EXEC_OMP_SINGLE
:
11675 case EXEC_OMP_TARGET
:
11676 case EXEC_OMP_TARGET_DATA
:
11677 case EXEC_OMP_TARGET_ENTER_DATA
:
11678 case EXEC_OMP_TARGET_EXIT_DATA
:
11679 case EXEC_OMP_TARGET_PARALLEL
:
11680 case EXEC_OMP_TARGET_PARALLEL_DO
:
11681 case EXEC_OMP_TARGET_PARALLEL_DO_SIMD
:
11682 case EXEC_OMP_TARGET_SIMD
:
11683 case EXEC_OMP_TARGET_TEAMS
:
11684 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE
:
11685 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO
:
11686 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
11687 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_SIMD
:
11688 case EXEC_OMP_TARGET_UPDATE
:
11689 case EXEC_OMP_TASK
:
11690 case EXEC_OMP_TASKGROUP
:
11691 case EXEC_OMP_TASKLOOP
:
11692 case EXEC_OMP_TASKLOOP_SIMD
:
11693 case EXEC_OMP_TASKWAIT
:
11694 case EXEC_OMP_TASKYIELD
:
11695 case EXEC_OMP_TEAMS
:
11696 case EXEC_OMP_TEAMS_DISTRIBUTE
:
11697 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO
:
11698 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
11699 case EXEC_OMP_TEAMS_DISTRIBUTE_SIMD
:
11700 case EXEC_OMP_WORKSHARE
:
11701 gfc_resolve_omp_directive (code
, ns
);
11704 case EXEC_OMP_PARALLEL
:
11705 case EXEC_OMP_PARALLEL_DO
:
11706 case EXEC_OMP_PARALLEL_DO_SIMD
:
11707 case EXEC_OMP_PARALLEL_SECTIONS
:
11708 case EXEC_OMP_PARALLEL_WORKSHARE
:
11709 omp_workshare_save
= omp_workshare_flag
;
11710 omp_workshare_flag
= 0;
11711 gfc_resolve_omp_directive (code
, ns
);
11712 omp_workshare_flag
= omp_workshare_save
;
11716 gfc_internal_error ("gfc_resolve_code(): Bad statement code");
11720 cs_base
= frame
.prev
;
11724 /* Resolve initial values and make sure they are compatible with
11728 resolve_values (gfc_symbol
*sym
)
11732 if (sym
->value
== NULL
)
11735 if (sym
->value
->expr_type
== EXPR_STRUCTURE
)
11736 t
= resolve_structure_cons (sym
->value
, 1);
11738 t
= gfc_resolve_expr (sym
->value
);
11743 gfc_check_assign_symbol (sym
, NULL
, sym
->value
);
11747 /* Verify any BIND(C) derived types in the namespace so we can report errors
11748 for them once, rather than for each variable declared of that type. */
11751 resolve_bind_c_derived_types (gfc_symbol
*derived_sym
)
11753 if (derived_sym
!= NULL
&& derived_sym
->attr
.flavor
== FL_DERIVED
11754 && derived_sym
->attr
.is_bind_c
== 1)
11755 verify_bind_c_derived_type (derived_sym
);
11761 /* Check the interfaces of DTIO procedures associated with derived
11762 type 'sym'. These procedures can either have typebound bindings or
11763 can appear in DTIO generic interfaces. */
11766 gfc_verify_DTIO_procedures (gfc_symbol
*sym
)
11768 if (!sym
|| sym
->attr
.flavor
!= FL_DERIVED
)
11771 gfc_check_dtio_interfaces (sym
);
11776 /* Verify that any binding labels used in a given namespace do not collide
11777 with the names or binding labels of any global symbols. Multiple INTERFACE
11778 for the same procedure are permitted. */
11781 gfc_verify_binding_labels (gfc_symbol
*sym
)
11784 const char *module
;
11786 if (!sym
|| !sym
->attr
.is_bind_c
|| sym
->attr
.is_iso_c
11787 || sym
->attr
.flavor
== FL_DERIVED
|| !sym
->binding_label
)
11790 gsym
= gfc_find_case_gsymbol (gfc_gsym_root
, sym
->binding_label
);
11793 module
= sym
->module
;
11794 else if (sym
->ns
&& sym
->ns
->proc_name
11795 && sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
)
11796 module
= sym
->ns
->proc_name
->name
;
11797 else if (sym
->ns
&& sym
->ns
->parent
11798 && sym
->ns
&& sym
->ns
->parent
->proc_name
11799 && sym
->ns
->parent
->proc_name
->attr
.flavor
== FL_MODULE
)
11800 module
= sym
->ns
->parent
->proc_name
->name
;
11806 && (gsym
->type
== GSYM_FUNCTION
|| gsym
->type
== GSYM_SUBROUTINE
)))
11809 gsym
= gfc_get_gsymbol (sym
->binding_label
);
11810 gsym
->where
= sym
->declared_at
;
11811 gsym
->sym_name
= sym
->name
;
11812 gsym
->binding_label
= sym
->binding_label
;
11813 gsym
->ns
= sym
->ns
;
11814 gsym
->mod_name
= module
;
11815 if (sym
->attr
.function
)
11816 gsym
->type
= GSYM_FUNCTION
;
11817 else if (sym
->attr
.subroutine
)
11818 gsym
->type
= GSYM_SUBROUTINE
;
11819 /* Mark as variable/procedure as defined, unless its an INTERFACE. */
11820 gsym
->defined
= sym
->attr
.if_source
!= IFSRC_IFBODY
;
11824 if (sym
->attr
.flavor
== FL_VARIABLE
&& gsym
->type
!= GSYM_UNKNOWN
)
11826 gfc_error ("Variable %qs with binding label %qs at %L uses the same global "
11827 "identifier as entity at %L", sym
->name
,
11828 sym
->binding_label
, &sym
->declared_at
, &gsym
->where
);
11829 /* Clear the binding label to prevent checking multiple times. */
11830 sym
->binding_label
= NULL
;
11834 if (sym
->attr
.flavor
== FL_VARIABLE
&& module
11835 && (strcmp (module
, gsym
->mod_name
) != 0
11836 || strcmp (sym
->name
, gsym
->sym_name
) != 0))
11838 /* This can only happen if the variable is defined in a module - if it
11839 isn't the same module, reject it. */
11840 gfc_error ("Variable %qs from module %qs with binding label %qs at %L "
11841 "uses the same global identifier as entity at %L from module %qs",
11842 sym
->name
, module
, sym
->binding_label
,
11843 &sym
->declared_at
, &gsym
->where
, gsym
->mod_name
);
11844 sym
->binding_label
= NULL
;
11848 if ((sym
->attr
.function
|| sym
->attr
.subroutine
)
11849 && ((gsym
->type
!= GSYM_SUBROUTINE
&& gsym
->type
!= GSYM_FUNCTION
)
11850 || (gsym
->defined
&& sym
->attr
.if_source
!= IFSRC_IFBODY
))
11851 && (sym
!= gsym
->ns
->proc_name
&& sym
->attr
.entry
== 0)
11852 && (module
!= gsym
->mod_name
11853 || strcmp (gsym
->sym_name
, sym
->name
) != 0
11854 || (module
&& strcmp (module
, gsym
->mod_name
) != 0)))
11856 /* Print an error if the procedure is defined multiple times; we have to
11857 exclude references to the same procedure via module association or
11858 multiple checks for the same procedure. */
11859 gfc_error ("Procedure %qs with binding label %qs at %L uses the same "
11860 "global identifier as entity at %L", sym
->name
,
11861 sym
->binding_label
, &sym
->declared_at
, &gsym
->where
);
11862 sym
->binding_label
= NULL
;
11867 /* Resolve an index expression. */
11870 resolve_index_expr (gfc_expr
*e
)
11872 if (!gfc_resolve_expr (e
))
11875 if (!gfc_simplify_expr (e
, 0))
11878 if (!gfc_specification_expr (e
))
11885 /* Resolve a charlen structure. */
11888 resolve_charlen (gfc_charlen
*cl
)
11891 bool saved_specification_expr
;
11897 saved_specification_expr
= specification_expr
;
11898 specification_expr
= true;
11900 if (cl
->length_from_typespec
)
11902 if (!gfc_resolve_expr (cl
->length
))
11904 specification_expr
= saved_specification_expr
;
11908 if (!gfc_simplify_expr (cl
->length
, 0))
11910 specification_expr
= saved_specification_expr
;
11914 /* cl->length has been resolved. It should have an integer type. */
11915 if (cl
->length
->ts
.type
!= BT_INTEGER
)
11917 gfc_error ("Scalar INTEGER expression expected at %L",
11918 &cl
->length
->where
);
11924 if (!resolve_index_expr (cl
->length
))
11926 specification_expr
= saved_specification_expr
;
11931 /* F2008, 4.4.3.2: If the character length parameter value evaluates to
11932 a negative value, the length of character entities declared is zero. */
11933 if (cl
->length
&& cl
->length
->expr_type
== EXPR_CONSTANT
11934 && mpz_sgn (cl
->length
->value
.integer
) < 0)
11935 gfc_replace_expr (cl
->length
,
11936 gfc_get_int_expr (gfc_charlen_int_kind
, NULL
, 0));
11938 /* Check that the character length is not too large. */
11939 k
= gfc_validate_kind (BT_INTEGER
, gfc_charlen_int_kind
, false);
11940 if (cl
->length
&& cl
->length
->expr_type
== EXPR_CONSTANT
11941 && cl
->length
->ts
.type
== BT_INTEGER
11942 && mpz_cmp (cl
->length
->value
.integer
, gfc_integer_kinds
[k
].huge
) > 0)
11944 gfc_error ("String length at %L is too large", &cl
->length
->where
);
11945 specification_expr
= saved_specification_expr
;
11949 specification_expr
= saved_specification_expr
;
11954 /* Test for non-constant shape arrays. */
11957 is_non_constant_shape_array (gfc_symbol
*sym
)
11963 not_constant
= false;
11964 if (sym
->as
!= NULL
)
11966 /* Unfortunately, !gfc_is_compile_time_shape hits a legal case that
11967 has not been simplified; parameter array references. Do the
11968 simplification now. */
11969 for (i
= 0; i
< sym
->as
->rank
+ sym
->as
->corank
; i
++)
11971 e
= sym
->as
->lower
[i
];
11972 if (e
&& (!resolve_index_expr(e
)
11973 || !gfc_is_constant_expr (e
)))
11974 not_constant
= true;
11975 e
= sym
->as
->upper
[i
];
11976 if (e
&& (!resolve_index_expr(e
)
11977 || !gfc_is_constant_expr (e
)))
11978 not_constant
= true;
11981 return not_constant
;
11984 /* Given a symbol and an initialization expression, add code to initialize
11985 the symbol to the function entry. */
11987 build_init_assign (gfc_symbol
*sym
, gfc_expr
*init
)
11991 gfc_namespace
*ns
= sym
->ns
;
11993 /* Search for the function namespace if this is a contained
11994 function without an explicit result. */
11995 if (sym
->attr
.function
&& sym
== sym
->result
11996 && sym
->name
!= sym
->ns
->proc_name
->name
)
11998 ns
= ns
->contained
;
11999 for (;ns
; ns
= ns
->sibling
)
12000 if (strcmp (ns
->proc_name
->name
, sym
->name
) == 0)
12006 gfc_free_expr (init
);
12010 /* Build an l-value expression for the result. */
12011 lval
= gfc_lval_expr_from_sym (sym
);
12013 /* Add the code at scope entry. */
12014 init_st
= gfc_get_code (EXEC_INIT_ASSIGN
);
12015 init_st
->next
= ns
->code
;
12016 ns
->code
= init_st
;
12018 /* Assign the default initializer to the l-value. */
12019 init_st
->loc
= sym
->declared_at
;
12020 init_st
->expr1
= lval
;
12021 init_st
->expr2
= init
;
12025 /* Whether or not we can generate a default initializer for a symbol. */
12028 can_generate_init (gfc_symbol
*sym
)
12030 symbol_attribute
*a
;
12035 /* These symbols should never have a default initialization. */
12040 || (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
)
12041 && (CLASS_DATA (sym
)->attr
.class_pointer
12042 || CLASS_DATA (sym
)->attr
.proc_pointer
))
12043 || a
->in_equivalence
12050 || (!a
->referenced
&& !a
->result
)
12051 || (a
->dummy
&& a
->intent
!= INTENT_OUT
)
12052 || (a
->function
&& sym
!= sym
->result
)
12057 /* Assign the default initializer to a derived type variable or result. */
12060 apply_default_init (gfc_symbol
*sym
)
12062 gfc_expr
*init
= NULL
;
12064 if (sym
->attr
.flavor
!= FL_VARIABLE
&& !sym
->attr
.function
)
12067 if (sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
)
12068 init
= gfc_generate_initializer (&sym
->ts
, can_generate_init (sym
));
12070 if (init
== NULL
&& sym
->ts
.type
!= BT_CLASS
)
12073 build_init_assign (sym
, init
);
12074 sym
->attr
.referenced
= 1;
12078 /* Build an initializer for a local. Returns null if the symbol should not have
12079 a default initialization. */
12082 build_default_init_expr (gfc_symbol
*sym
)
12084 /* These symbols should never have a default initialization. */
12085 if (sym
->attr
.allocatable
12086 || sym
->attr
.external
12088 || sym
->attr
.pointer
12089 || sym
->attr
.in_equivalence
12090 || sym
->attr
.in_common
12093 || sym
->attr
.cray_pointee
12094 || sym
->attr
.cray_pointer
12098 /* Get the appropriate init expression. */
12099 return gfc_build_default_init_expr (&sym
->ts
, &sym
->declared_at
);
12102 /* Add an initialization expression to a local variable. */
12104 apply_default_init_local (gfc_symbol
*sym
)
12106 gfc_expr
*init
= NULL
;
12108 /* The symbol should be a variable or a function return value. */
12109 if ((sym
->attr
.flavor
!= FL_VARIABLE
&& !sym
->attr
.function
)
12110 || (sym
->attr
.function
&& sym
->result
!= sym
))
12113 /* Try to build the initializer expression. If we can't initialize
12114 this symbol, then init will be NULL. */
12115 init
= build_default_init_expr (sym
);
12119 /* For saved variables, we don't want to add an initializer at function
12120 entry, so we just add a static initializer. Note that automatic variables
12121 are stack allocated even with -fno-automatic; we have also to exclude
12122 result variable, which are also nonstatic. */
12123 if (!sym
->attr
.automatic
12124 && (sym
->attr
.save
|| sym
->ns
->save_all
12125 || (flag_max_stack_var_size
== 0 && !sym
->attr
.result
12126 && (sym
->ns
->proc_name
&& !sym
->ns
->proc_name
->attr
.recursive
)
12127 && (!sym
->attr
.dimension
|| !is_non_constant_shape_array (sym
)))))
12129 /* Don't clobber an existing initializer! */
12130 gcc_assert (sym
->value
== NULL
);
12135 build_init_assign (sym
, init
);
12139 /* Resolution of common features of flavors variable and procedure. */
12142 resolve_fl_var_and_proc (gfc_symbol
*sym
, int mp_flag
)
12144 gfc_array_spec
*as
;
12146 if (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
)
12147 as
= CLASS_DATA (sym
)->as
;
12151 /* Constraints on deferred shape variable. */
12152 if (as
== NULL
|| as
->type
!= AS_DEFERRED
)
12154 bool pointer
, allocatable
, dimension
;
12156 if (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
)
12158 pointer
= CLASS_DATA (sym
)->attr
.class_pointer
;
12159 allocatable
= CLASS_DATA (sym
)->attr
.allocatable
;
12160 dimension
= CLASS_DATA (sym
)->attr
.dimension
;
12164 pointer
= sym
->attr
.pointer
&& !sym
->attr
.select_type_temporary
;
12165 allocatable
= sym
->attr
.allocatable
;
12166 dimension
= sym
->attr
.dimension
;
12171 if (dimension
&& as
->type
!= AS_ASSUMED_RANK
)
12173 gfc_error ("Allocatable array %qs at %L must have a deferred "
12174 "shape or assumed rank", sym
->name
, &sym
->declared_at
);
12177 else if (!gfc_notify_std (GFC_STD_F2003
, "Scalar object "
12178 "%qs at %L may not be ALLOCATABLE",
12179 sym
->name
, &sym
->declared_at
))
12183 if (pointer
&& dimension
&& as
->type
!= AS_ASSUMED_RANK
)
12185 gfc_error ("Array pointer %qs at %L must have a deferred shape or "
12186 "assumed rank", sym
->name
, &sym
->declared_at
);
12192 if (!mp_flag
&& !sym
->attr
.allocatable
&& !sym
->attr
.pointer
12193 && sym
->ts
.type
!= BT_CLASS
&& !sym
->assoc
)
12195 gfc_error ("Array %qs at %L cannot have a deferred shape",
12196 sym
->name
, &sym
->declared_at
);
12201 /* Constraints on polymorphic variables. */
12202 if (sym
->ts
.type
== BT_CLASS
&& !(sym
->result
&& sym
->result
!= sym
))
12205 if (sym
->attr
.class_ok
12206 && !sym
->attr
.select_type_temporary
12207 && !UNLIMITED_POLY (sym
)
12208 && !gfc_type_is_extensible (CLASS_DATA (sym
)->ts
.u
.derived
))
12210 gfc_error ("Type %qs of CLASS variable %qs at %L is not extensible",
12211 CLASS_DATA (sym
)->ts
.u
.derived
->name
, sym
->name
,
12212 &sym
->declared_at
);
12217 /* Assume that use associated symbols were checked in the module ns.
12218 Class-variables that are associate-names are also something special
12219 and excepted from the test. */
12220 if (!sym
->attr
.class_ok
&& !sym
->attr
.use_assoc
&& !sym
->assoc
)
12222 gfc_error ("CLASS variable %qs at %L must be dummy, allocatable "
12223 "or pointer", sym
->name
, &sym
->declared_at
);
12232 /* Additional checks for symbols with flavor variable and derived
12233 type. To be called from resolve_fl_variable. */
12236 resolve_fl_variable_derived (gfc_symbol
*sym
, int no_init_flag
)
12238 gcc_assert (sym
->ts
.type
== BT_DERIVED
|| sym
->ts
.type
== BT_CLASS
);
12240 /* Check to see if a derived type is blocked from being host
12241 associated by the presence of another class I symbol in the same
12242 namespace. 14.6.1.3 of the standard and the discussion on
12243 comp.lang.fortran. */
12244 if (sym
->ns
!= sym
->ts
.u
.derived
->ns
12245 && !sym
->ts
.u
.derived
->attr
.use_assoc
12246 && sym
->ns
->proc_name
->attr
.if_source
!= IFSRC_IFBODY
)
12249 gfc_find_symbol (sym
->ts
.u
.derived
->name
, sym
->ns
, 0, &s
);
12250 if (s
&& s
->attr
.generic
)
12251 s
= gfc_find_dt_in_generic (s
);
12252 if (s
&& !gfc_fl_struct (s
->attr
.flavor
))
12254 gfc_error ("The type %qs cannot be host associated at %L "
12255 "because it is blocked by an incompatible object "
12256 "of the same name declared at %L",
12257 sym
->ts
.u
.derived
->name
, &sym
->declared_at
,
12263 /* 4th constraint in section 11.3: "If an object of a type for which
12264 component-initialization is specified (R429) appears in the
12265 specification-part of a module and does not have the ALLOCATABLE
12266 or POINTER attribute, the object shall have the SAVE attribute."
12268 The check for initializers is performed with
12269 gfc_has_default_initializer because gfc_default_initializer generates
12270 a hidden default for allocatable components. */
12271 if (!(sym
->value
|| no_init_flag
) && sym
->ns
->proc_name
12272 && sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
12273 && !(sym
->ns
->save_all
&& !sym
->attr
.automatic
) && !sym
->attr
.save
12274 && !sym
->attr
.pointer
&& !sym
->attr
.allocatable
12275 && gfc_has_default_initializer (sym
->ts
.u
.derived
)
12276 && !gfc_notify_std (GFC_STD_F2008
, "Implied SAVE for module variable "
12277 "%qs at %L, needed due to the default "
12278 "initialization", sym
->name
, &sym
->declared_at
))
12281 /* Assign default initializer. */
12282 if (!(sym
->value
|| sym
->attr
.pointer
|| sym
->attr
.allocatable
)
12283 && (!no_init_flag
|| sym
->attr
.intent
== INTENT_OUT
))
12284 sym
->value
= gfc_generate_initializer (&sym
->ts
, can_generate_init (sym
));
12290 /* F2008, C402 (R401): A colon shall not be used as a type-param-value
12291 except in the declaration of an entity or component that has the POINTER
12292 or ALLOCATABLE attribute. */
12295 deferred_requirements (gfc_symbol
*sym
)
12297 if (sym
->ts
.deferred
12298 && !(sym
->attr
.pointer
12299 || sym
->attr
.allocatable
12300 || sym
->attr
.associate_var
12301 || sym
->attr
.omp_udr_artificial_var
))
12303 gfc_error ("Entity %qs at %L has a deferred type parameter and "
12304 "requires either the POINTER or ALLOCATABLE attribute",
12305 sym
->name
, &sym
->declared_at
);
12312 /* Resolve symbols with flavor variable. */
12315 resolve_fl_variable (gfc_symbol
*sym
, int mp_flag
)
12317 const char *auto_save_msg
= "Automatic object %qs at %L cannot have the "
12320 if (!resolve_fl_var_and_proc (sym
, mp_flag
))
12323 /* Set this flag to check that variables are parameters of all entries.
12324 This check is effected by the call to gfc_resolve_expr through
12325 is_non_constant_shape_array. */
12326 bool saved_specification_expr
= specification_expr
;
12327 specification_expr
= true;
12329 if (sym
->ns
->proc_name
12330 && (sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
12331 || sym
->ns
->proc_name
->attr
.is_main_program
)
12332 && !sym
->attr
.use_assoc
12333 && !sym
->attr
.allocatable
12334 && !sym
->attr
.pointer
12335 && is_non_constant_shape_array (sym
))
12337 /* F08:C541. The shape of an array defined in a main program or module
12338 * needs to be constant. */
12339 gfc_error ("The module or main program array %qs at %L must "
12340 "have constant shape", sym
->name
, &sym
->declared_at
);
12341 specification_expr
= saved_specification_expr
;
12345 /* Constraints on deferred type parameter. */
12346 if (!deferred_requirements (sym
))
12349 if (sym
->ts
.type
== BT_CHARACTER
&& !sym
->attr
.associate_var
)
12351 /* Make sure that character string variables with assumed length are
12352 dummy arguments. */
12353 gfc_expr
*e
= NULL
;
12356 e
= sym
->ts
.u
.cl
->length
;
12360 if (e
== NULL
&& !sym
->attr
.dummy
&& !sym
->attr
.result
12361 && !sym
->ts
.deferred
&& !sym
->attr
.select_type_temporary
12362 && !sym
->attr
.omp_udr_artificial_var
)
12364 gfc_error ("Entity with assumed character length at %L must be a "
12365 "dummy argument or a PARAMETER", &sym
->declared_at
);
12366 specification_expr
= saved_specification_expr
;
12370 if (e
&& sym
->attr
.save
== SAVE_EXPLICIT
&& !gfc_is_constant_expr (e
))
12372 gfc_error (auto_save_msg
, sym
->name
, &sym
->declared_at
);
12373 specification_expr
= saved_specification_expr
;
12377 if (!gfc_is_constant_expr (e
)
12378 && !(e
->expr_type
== EXPR_VARIABLE
12379 && e
->symtree
->n
.sym
->attr
.flavor
== FL_PARAMETER
))
12381 if (!sym
->attr
.use_assoc
&& sym
->ns
->proc_name
12382 && (sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
12383 || sym
->ns
->proc_name
->attr
.is_main_program
))
12385 gfc_error ("%qs at %L must have constant character length "
12386 "in this context", sym
->name
, &sym
->declared_at
);
12387 specification_expr
= saved_specification_expr
;
12390 if (sym
->attr
.in_common
)
12392 gfc_error ("COMMON variable %qs at %L must have constant "
12393 "character length", sym
->name
, &sym
->declared_at
);
12394 specification_expr
= saved_specification_expr
;
12400 if (sym
->value
== NULL
&& sym
->attr
.referenced
)
12401 apply_default_init_local (sym
); /* Try to apply a default initialization. */
12403 /* Determine if the symbol may not have an initializer. */
12404 int no_init_flag
= 0, automatic_flag
= 0;
12405 if (sym
->attr
.allocatable
|| sym
->attr
.external
|| sym
->attr
.dummy
12406 || sym
->attr
.intrinsic
|| sym
->attr
.result
)
12408 else if ((sym
->attr
.dimension
|| sym
->attr
.codimension
) && !sym
->attr
.pointer
12409 && is_non_constant_shape_array (sym
))
12411 no_init_flag
= automatic_flag
= 1;
12413 /* Also, they must not have the SAVE attribute.
12414 SAVE_IMPLICIT is checked below. */
12415 if (sym
->as
&& sym
->attr
.codimension
)
12417 int corank
= sym
->as
->corank
;
12418 sym
->as
->corank
= 0;
12419 no_init_flag
= automatic_flag
= is_non_constant_shape_array (sym
);
12420 sym
->as
->corank
= corank
;
12422 if (automatic_flag
&& sym
->attr
.save
== SAVE_EXPLICIT
)
12424 gfc_error (auto_save_msg
, sym
->name
, &sym
->declared_at
);
12425 specification_expr
= saved_specification_expr
;
12430 /* Ensure that any initializer is simplified. */
12432 gfc_simplify_expr (sym
->value
, 1);
12434 /* Reject illegal initializers. */
12435 if (!sym
->mark
&& sym
->value
)
12437 if (sym
->attr
.allocatable
|| (sym
->ts
.type
== BT_CLASS
12438 && CLASS_DATA (sym
)->attr
.allocatable
))
12439 gfc_error ("Allocatable %qs at %L cannot have an initializer",
12440 sym
->name
, &sym
->declared_at
);
12441 else if (sym
->attr
.external
)
12442 gfc_error ("External %qs at %L cannot have an initializer",
12443 sym
->name
, &sym
->declared_at
);
12444 else if (sym
->attr
.dummy
12445 && !(sym
->ts
.type
== BT_DERIVED
&& sym
->attr
.intent
== INTENT_OUT
))
12446 gfc_error ("Dummy %qs at %L cannot have an initializer",
12447 sym
->name
, &sym
->declared_at
);
12448 else if (sym
->attr
.intrinsic
)
12449 gfc_error ("Intrinsic %qs at %L cannot have an initializer",
12450 sym
->name
, &sym
->declared_at
);
12451 else if (sym
->attr
.result
)
12452 gfc_error ("Function result %qs at %L cannot have an initializer",
12453 sym
->name
, &sym
->declared_at
);
12454 else if (automatic_flag
)
12455 gfc_error ("Automatic array %qs at %L cannot have an initializer",
12456 sym
->name
, &sym
->declared_at
);
12458 goto no_init_error
;
12459 specification_expr
= saved_specification_expr
;
12464 if (sym
->ts
.type
== BT_DERIVED
|| sym
->ts
.type
== BT_CLASS
)
12466 bool res
= resolve_fl_variable_derived (sym
, no_init_flag
);
12467 specification_expr
= saved_specification_expr
;
12471 specification_expr
= saved_specification_expr
;
12476 /* Compare the dummy characteristics of a module procedure interface
12477 declaration with the corresponding declaration in a submodule. */
12478 static gfc_formal_arglist
*new_formal
;
12479 static char errmsg
[200];
12482 compare_fsyms (gfc_symbol
*sym
)
12486 if (sym
== NULL
|| new_formal
== NULL
)
12489 fsym
= new_formal
->sym
;
12494 if (strcmp (sym
->name
, fsym
->name
) == 0)
12496 if (!gfc_check_dummy_characteristics (fsym
, sym
, true, errmsg
, 200))
12497 gfc_error ("%s at %L", errmsg
, &fsym
->declared_at
);
12502 /* Resolve a procedure. */
12505 resolve_fl_procedure (gfc_symbol
*sym
, int mp_flag
)
12507 gfc_formal_arglist
*arg
;
12509 if (sym
->attr
.function
12510 && !resolve_fl_var_and_proc (sym
, mp_flag
))
12513 if (sym
->ts
.type
== BT_CHARACTER
)
12515 gfc_charlen
*cl
= sym
->ts
.u
.cl
;
12517 if (cl
&& cl
->length
&& gfc_is_constant_expr (cl
->length
)
12518 && !resolve_charlen (cl
))
12521 if ((!cl
|| !cl
->length
|| cl
->length
->expr_type
!= EXPR_CONSTANT
)
12522 && sym
->attr
.proc
== PROC_ST_FUNCTION
)
12524 gfc_error ("Character-valued statement function %qs at %L must "
12525 "have constant length", sym
->name
, &sym
->declared_at
);
12530 /* Ensure that derived type for are not of a private type. Internal
12531 module procedures are excluded by 2.2.3.3 - i.e., they are not
12532 externally accessible and can access all the objects accessible in
12534 if (!(sym
->ns
->parent
&& sym
->ns
->parent
->proc_name
12535 && sym
->ns
->parent
->proc_name
->attr
.flavor
== FL_MODULE
)
12536 && gfc_check_symbol_access (sym
))
12538 gfc_interface
*iface
;
12540 for (arg
= gfc_sym_get_dummy_args (sym
); arg
; arg
= arg
->next
)
12543 && arg
->sym
->ts
.type
== BT_DERIVED
12544 && !arg
->sym
->ts
.u
.derived
->attr
.use_assoc
12545 && !gfc_check_symbol_access (arg
->sym
->ts
.u
.derived
)
12546 && !gfc_notify_std (GFC_STD_F2003
, "%qs is of a PRIVATE type "
12547 "and cannot be a dummy argument"
12548 " of %qs, which is PUBLIC at %L",
12549 arg
->sym
->name
, sym
->name
,
12550 &sym
->declared_at
))
12552 /* Stop this message from recurring. */
12553 arg
->sym
->ts
.u
.derived
->attr
.access
= ACCESS_PUBLIC
;
12558 /* PUBLIC interfaces may expose PRIVATE procedures that take types
12559 PRIVATE to the containing module. */
12560 for (iface
= sym
->generic
; iface
; iface
= iface
->next
)
12562 for (arg
= gfc_sym_get_dummy_args (iface
->sym
); arg
; arg
= arg
->next
)
12565 && arg
->sym
->ts
.type
== BT_DERIVED
12566 && !arg
->sym
->ts
.u
.derived
->attr
.use_assoc
12567 && !gfc_check_symbol_access (arg
->sym
->ts
.u
.derived
)
12568 && !gfc_notify_std (GFC_STD_F2003
, "Procedure %qs in "
12569 "PUBLIC interface %qs at %L "
12570 "takes dummy arguments of %qs which "
12571 "is PRIVATE", iface
->sym
->name
,
12572 sym
->name
, &iface
->sym
->declared_at
,
12573 gfc_typename(&arg
->sym
->ts
)))
12575 /* Stop this message from recurring. */
12576 arg
->sym
->ts
.u
.derived
->attr
.access
= ACCESS_PUBLIC
;
12583 if (sym
->attr
.function
&& sym
->value
&& sym
->attr
.proc
!= PROC_ST_FUNCTION
12584 && !sym
->attr
.proc_pointer
)
12586 gfc_error ("Function %qs at %L cannot have an initializer",
12587 sym
->name
, &sym
->declared_at
);
12589 /* Make sure no second error is issued for this. */
12590 sym
->value
->error
= 1;
12594 /* An external symbol may not have an initializer because it is taken to be
12595 a procedure. Exception: Procedure Pointers. */
12596 if (sym
->attr
.external
&& sym
->value
&& !sym
->attr
.proc_pointer
)
12598 gfc_error ("External object %qs at %L may not have an initializer",
12599 sym
->name
, &sym
->declared_at
);
12603 /* An elemental function is required to return a scalar 12.7.1 */
12604 if (sym
->attr
.elemental
&& sym
->attr
.function
12605 && (sym
->as
|| (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
)->as
)))
12607 gfc_error ("ELEMENTAL function %qs at %L must have a scalar "
12608 "result", sym
->name
, &sym
->declared_at
);
12609 /* Reset so that the error only occurs once. */
12610 sym
->attr
.elemental
= 0;
12614 if (sym
->attr
.proc
== PROC_ST_FUNCTION
12615 && (sym
->attr
.allocatable
|| sym
->attr
.pointer
))
12617 gfc_error ("Statement function %qs at %L may not have pointer or "
12618 "allocatable attribute", sym
->name
, &sym
->declared_at
);
12622 /* 5.1.1.5 of the Standard: A function name declared with an asterisk
12623 char-len-param shall not be array-valued, pointer-valued, recursive
12624 or pure. ....snip... A character value of * may only be used in the
12625 following ways: (i) Dummy arg of procedure - dummy associates with
12626 actual length; (ii) To declare a named constant; or (iii) External
12627 function - but length must be declared in calling scoping unit. */
12628 if (sym
->attr
.function
12629 && sym
->ts
.type
== BT_CHARACTER
&& !sym
->ts
.deferred
12630 && sym
->ts
.u
.cl
&& sym
->ts
.u
.cl
->length
== NULL
)
12632 if ((sym
->as
&& sym
->as
->rank
) || (sym
->attr
.pointer
)
12633 || (sym
->attr
.recursive
) || (sym
->attr
.pure
))
12635 if (sym
->as
&& sym
->as
->rank
)
12636 gfc_error ("CHARACTER(*) function %qs at %L cannot be "
12637 "array-valued", sym
->name
, &sym
->declared_at
);
12639 if (sym
->attr
.pointer
)
12640 gfc_error ("CHARACTER(*) function %qs at %L cannot be "
12641 "pointer-valued", sym
->name
, &sym
->declared_at
);
12643 if (sym
->attr
.pure
)
12644 gfc_error ("CHARACTER(*) function %qs at %L cannot be "
12645 "pure", sym
->name
, &sym
->declared_at
);
12647 if (sym
->attr
.recursive
)
12648 gfc_error ("CHARACTER(*) function %qs at %L cannot be "
12649 "recursive", sym
->name
, &sym
->declared_at
);
12654 /* Appendix B.2 of the standard. Contained functions give an
12655 error anyway. Deferred character length is an F2003 feature.
12656 Don't warn on intrinsic conversion functions, which start
12657 with two underscores. */
12658 if (!sym
->attr
.contained
&& !sym
->ts
.deferred
12659 && (sym
->name
[0] != '_' || sym
->name
[1] != '_'))
12660 gfc_notify_std (GFC_STD_F95_OBS
,
12661 "CHARACTER(*) function %qs at %L",
12662 sym
->name
, &sym
->declared_at
);
12665 /* F2008, C1218. */
12666 if (sym
->attr
.elemental
)
12668 if (sym
->attr
.proc_pointer
)
12670 gfc_error ("Procedure pointer %qs at %L shall not be elemental",
12671 sym
->name
, &sym
->declared_at
);
12674 if (sym
->attr
.dummy
)
12676 gfc_error ("Dummy procedure %qs at %L shall not be elemental",
12677 sym
->name
, &sym
->declared_at
);
12682 /* F2018, C15100: "The result of an elemental function shall be scalar,
12683 and shall not have the POINTER or ALLOCATABLE attribute." The scalar
12684 pointer is tested and caught elsewhere. */
12685 if (sym
->attr
.elemental
&& sym
->result
12686 && (sym
->result
->attr
.allocatable
|| sym
->result
->attr
.pointer
))
12688 gfc_error ("Function result variable %qs at %L of elemental "
12689 "function %qs shall not have an ALLOCATABLE or POINTER "
12690 "attribute", sym
->result
->name
,
12691 &sym
->result
->declared_at
, sym
->name
);
12695 if (sym
->attr
.is_bind_c
&& sym
->attr
.is_c_interop
!= 1)
12697 gfc_formal_arglist
*curr_arg
;
12698 int has_non_interop_arg
= 0;
12700 if (!verify_bind_c_sym (sym
, &(sym
->ts
), sym
->attr
.in_common
,
12701 sym
->common_block
))
12703 /* Clear these to prevent looking at them again if there was an
12705 sym
->attr
.is_bind_c
= 0;
12706 sym
->attr
.is_c_interop
= 0;
12707 sym
->ts
.is_c_interop
= 0;
12711 /* So far, no errors have been found. */
12712 sym
->attr
.is_c_interop
= 1;
12713 sym
->ts
.is_c_interop
= 1;
12716 curr_arg
= gfc_sym_get_dummy_args (sym
);
12717 while (curr_arg
!= NULL
)
12719 /* Skip implicitly typed dummy args here. */
12720 if (curr_arg
->sym
&& curr_arg
->sym
->attr
.implicit_type
== 0)
12721 if (!gfc_verify_c_interop_param (curr_arg
->sym
))
12722 /* If something is found to fail, record the fact so we
12723 can mark the symbol for the procedure as not being
12724 BIND(C) to try and prevent multiple errors being
12726 has_non_interop_arg
= 1;
12728 curr_arg
= curr_arg
->next
;
12731 /* See if any of the arguments were not interoperable and if so, clear
12732 the procedure symbol to prevent duplicate error messages. */
12733 if (has_non_interop_arg
!= 0)
12735 sym
->attr
.is_c_interop
= 0;
12736 sym
->ts
.is_c_interop
= 0;
12737 sym
->attr
.is_bind_c
= 0;
12741 if (!sym
->attr
.proc_pointer
)
12743 if (sym
->attr
.save
== SAVE_EXPLICIT
)
12745 gfc_error ("PROCEDURE attribute conflicts with SAVE attribute "
12746 "in %qs at %L", sym
->name
, &sym
->declared_at
);
12749 if (sym
->attr
.intent
)
12751 gfc_error ("PROCEDURE attribute conflicts with INTENT attribute "
12752 "in %qs at %L", sym
->name
, &sym
->declared_at
);
12755 if (sym
->attr
.subroutine
&& sym
->attr
.result
)
12757 gfc_error ("PROCEDURE attribute conflicts with RESULT attribute "
12758 "in %qs at %L", sym
->name
, &sym
->declared_at
);
12761 if (sym
->attr
.external
&& sym
->attr
.function
&& !sym
->attr
.module_procedure
12762 && ((sym
->attr
.if_source
== IFSRC_DECL
&& !sym
->attr
.procedure
)
12763 || sym
->attr
.contained
))
12765 gfc_error ("EXTERNAL attribute conflicts with FUNCTION attribute "
12766 "in %qs at %L", sym
->name
, &sym
->declared_at
);
12769 if (strcmp ("ppr@", sym
->name
) == 0)
12771 gfc_error ("Procedure pointer result %qs at %L "
12772 "is missing the pointer attribute",
12773 sym
->ns
->proc_name
->name
, &sym
->declared_at
);
12778 /* Assume that a procedure whose body is not known has references
12779 to external arrays. */
12780 if (sym
->attr
.if_source
!= IFSRC_DECL
)
12781 sym
->attr
.array_outer_dependency
= 1;
12783 /* Compare the characteristics of a module procedure with the
12784 interface declaration. Ideally this would be done with
12785 gfc_compare_interfaces but, at present, the formal interface
12786 cannot be copied to the ts.interface. */
12787 if (sym
->attr
.module_procedure
12788 && sym
->attr
.if_source
== IFSRC_DECL
)
12791 char name
[2*GFC_MAX_SYMBOL_LEN
+ 1];
12793 char *submodule_name
;
12794 strcpy (name
, sym
->ns
->proc_name
->name
);
12795 module_name
= strtok (name
, ".");
12796 submodule_name
= strtok (NULL
, ".");
12798 iface
= sym
->tlink
;
12801 /* Make sure that the result uses the correct charlen for deferred
12803 if (iface
&& sym
->result
12804 && iface
->ts
.type
== BT_CHARACTER
12805 && iface
->ts
.deferred
)
12806 sym
->result
->ts
.u
.cl
= iface
->ts
.u
.cl
;
12811 /* Check the procedure characteristics. */
12812 if (sym
->attr
.elemental
!= iface
->attr
.elemental
)
12814 gfc_error ("Mismatch in ELEMENTAL attribute between MODULE "
12815 "PROCEDURE at %L and its interface in %s",
12816 &sym
->declared_at
, module_name
);
12820 if (sym
->attr
.pure
!= iface
->attr
.pure
)
12822 gfc_error ("Mismatch in PURE attribute between MODULE "
12823 "PROCEDURE at %L and its interface in %s",
12824 &sym
->declared_at
, module_name
);
12828 if (sym
->attr
.recursive
!= iface
->attr
.recursive
)
12830 gfc_error ("Mismatch in RECURSIVE attribute between MODULE "
12831 "PROCEDURE at %L and its interface in %s",
12832 &sym
->declared_at
, module_name
);
12836 /* Check the result characteristics. */
12837 if (!gfc_check_result_characteristics (sym
, iface
, errmsg
, 200))
12839 gfc_error ("%s between the MODULE PROCEDURE declaration "
12840 "in MODULE %qs and the declaration at %L in "
12842 errmsg
, module_name
, &sym
->declared_at
,
12843 submodule_name
? submodule_name
: module_name
);
12848 /* Check the characteristics of the formal arguments. */
12849 if (sym
->formal
&& sym
->formal_ns
)
12851 for (arg
= sym
->formal
; arg
&& arg
->sym
; arg
= arg
->next
)
12854 gfc_traverse_ns (sym
->formal_ns
, compare_fsyms
);
12862 /* Resolve a list of finalizer procedures. That is, after they have hopefully
12863 been defined and we now know their defined arguments, check that they fulfill
12864 the requirements of the standard for procedures used as finalizers. */
12867 gfc_resolve_finalizers (gfc_symbol
* derived
, bool *finalizable
)
12869 gfc_finalizer
* list
;
12870 gfc_finalizer
** prev_link
; /* For removing wrong entries from the list. */
12871 bool result
= true;
12872 bool seen_scalar
= false;
12875 gfc_symbol
*parent
= gfc_get_derived_super_type (derived
);
12878 gfc_resolve_finalizers (parent
, finalizable
);
12880 /* Ensure that derived-type components have a their finalizers resolved. */
12881 bool has_final
= derived
->f2k_derived
&& derived
->f2k_derived
->finalizers
;
12882 for (c
= derived
->components
; c
; c
= c
->next
)
12883 if (c
->ts
.type
== BT_DERIVED
12884 && !c
->attr
.pointer
&& !c
->attr
.proc_pointer
&& !c
->attr
.allocatable
)
12886 bool has_final2
= false;
12887 if (!gfc_resolve_finalizers (c
->ts
.u
.derived
, &has_final2
))
12888 return false; /* Error. */
12889 has_final
= has_final
|| has_final2
;
12891 /* Return early if not finalizable. */
12895 *finalizable
= false;
12899 /* Walk over the list of finalizer-procedures, check them, and if any one
12900 does not fit in with the standard's definition, print an error and remove
12901 it from the list. */
12902 prev_link
= &derived
->f2k_derived
->finalizers
;
12903 for (list
= derived
->f2k_derived
->finalizers
; list
; list
= *prev_link
)
12905 gfc_formal_arglist
*dummy_args
;
12910 /* Skip this finalizer if we already resolved it. */
12911 if (list
->proc_tree
)
12913 if (list
->proc_tree
->n
.sym
->formal
->sym
->as
== NULL
12914 || list
->proc_tree
->n
.sym
->formal
->sym
->as
->rank
== 0)
12915 seen_scalar
= true;
12916 prev_link
= &(list
->next
);
12920 /* Check this exists and is a SUBROUTINE. */
12921 if (!list
->proc_sym
->attr
.subroutine
)
12923 gfc_error ("FINAL procedure %qs at %L is not a SUBROUTINE",
12924 list
->proc_sym
->name
, &list
->where
);
12928 /* We should have exactly one argument. */
12929 dummy_args
= gfc_sym_get_dummy_args (list
->proc_sym
);
12930 if (!dummy_args
|| dummy_args
->next
)
12932 gfc_error ("FINAL procedure at %L must have exactly one argument",
12936 arg
= dummy_args
->sym
;
12938 /* This argument must be of our type. */
12939 if (arg
->ts
.type
!= BT_DERIVED
|| arg
->ts
.u
.derived
!= derived
)
12941 gfc_error ("Argument of FINAL procedure at %L must be of type %qs",
12942 &arg
->declared_at
, derived
->name
);
12946 /* It must neither be a pointer nor allocatable nor optional. */
12947 if (arg
->attr
.pointer
)
12949 gfc_error ("Argument of FINAL procedure at %L must not be a POINTER",
12950 &arg
->declared_at
);
12953 if (arg
->attr
.allocatable
)
12955 gfc_error ("Argument of FINAL procedure at %L must not be"
12956 " ALLOCATABLE", &arg
->declared_at
);
12959 if (arg
->attr
.optional
)
12961 gfc_error ("Argument of FINAL procedure at %L must not be OPTIONAL",
12962 &arg
->declared_at
);
12966 /* It must not be INTENT(OUT). */
12967 if (arg
->attr
.intent
== INTENT_OUT
)
12969 gfc_error ("Argument of FINAL procedure at %L must not be"
12970 " INTENT(OUT)", &arg
->declared_at
);
12974 /* Warn if the procedure is non-scalar and not assumed shape. */
12975 if (warn_surprising
&& arg
->as
&& arg
->as
->rank
!= 0
12976 && arg
->as
->type
!= AS_ASSUMED_SHAPE
)
12977 gfc_warning (OPT_Wsurprising
,
12978 "Non-scalar FINAL procedure at %L should have assumed"
12979 " shape argument", &arg
->declared_at
);
12981 /* Check that it does not match in kind and rank with a FINAL procedure
12982 defined earlier. To really loop over the *earlier* declarations,
12983 we need to walk the tail of the list as new ones were pushed at the
12985 /* TODO: Handle kind parameters once they are implemented. */
12986 my_rank
= (arg
->as
? arg
->as
->rank
: 0);
12987 for (i
= list
->next
; i
; i
= i
->next
)
12989 gfc_formal_arglist
*dummy_args
;
12991 /* Argument list might be empty; that is an error signalled earlier,
12992 but we nevertheless continued resolving. */
12993 dummy_args
= gfc_sym_get_dummy_args (i
->proc_sym
);
12996 gfc_symbol
* i_arg
= dummy_args
->sym
;
12997 const int i_rank
= (i_arg
->as
? i_arg
->as
->rank
: 0);
12998 if (i_rank
== my_rank
)
13000 gfc_error ("FINAL procedure %qs declared at %L has the same"
13001 " rank (%d) as %qs",
13002 list
->proc_sym
->name
, &list
->where
, my_rank
,
13003 i
->proc_sym
->name
);
13009 /* Is this the/a scalar finalizer procedure? */
13011 seen_scalar
= true;
13013 /* Find the symtree for this procedure. */
13014 gcc_assert (!list
->proc_tree
);
13015 list
->proc_tree
= gfc_find_sym_in_symtree (list
->proc_sym
);
13017 prev_link
= &list
->next
;
13020 /* Remove wrong nodes immediately from the list so we don't risk any
13021 troubles in the future when they might fail later expectations. */
13024 *prev_link
= list
->next
;
13025 gfc_free_finalizer (i
);
13029 if (result
== false)
13032 /* Warn if we haven't seen a scalar finalizer procedure (but we know there
13033 were nodes in the list, must have been for arrays. It is surely a good
13034 idea to have a scalar version there if there's something to finalize. */
13035 if (warn_surprising
&& derived
->f2k_derived
->finalizers
&& !seen_scalar
)
13036 gfc_warning (OPT_Wsurprising
,
13037 "Only array FINAL procedures declared for derived type %qs"
13038 " defined at %L, suggest also scalar one",
13039 derived
->name
, &derived
->declared_at
);
13041 vtab
= gfc_find_derived_vtab (derived
);
13042 c
= vtab
->ts
.u
.derived
->components
->next
->next
->next
->next
->next
;
13043 gfc_set_sym_referenced (c
->initializer
->symtree
->n
.sym
);
13046 *finalizable
= true;
13052 /* Check if two GENERIC targets are ambiguous and emit an error is they are. */
13055 check_generic_tbp_ambiguity (gfc_tbp_generic
* t1
, gfc_tbp_generic
* t2
,
13056 const char* generic_name
, locus where
)
13058 gfc_symbol
*sym1
, *sym2
;
13059 const char *pass1
, *pass2
;
13060 gfc_formal_arglist
*dummy_args
;
13062 gcc_assert (t1
->specific
&& t2
->specific
);
13063 gcc_assert (!t1
->specific
->is_generic
);
13064 gcc_assert (!t2
->specific
->is_generic
);
13065 gcc_assert (t1
->is_operator
== t2
->is_operator
);
13067 sym1
= t1
->specific
->u
.specific
->n
.sym
;
13068 sym2
= t2
->specific
->u
.specific
->n
.sym
;
13073 /* Both must be SUBROUTINEs or both must be FUNCTIONs. */
13074 if (sym1
->attr
.subroutine
!= sym2
->attr
.subroutine
13075 || sym1
->attr
.function
!= sym2
->attr
.function
)
13077 gfc_error ("%qs and %qs can't be mixed FUNCTION/SUBROUTINE for"
13078 " GENERIC %qs at %L",
13079 sym1
->name
, sym2
->name
, generic_name
, &where
);
13083 /* Determine PASS arguments. */
13084 if (t1
->specific
->nopass
)
13086 else if (t1
->specific
->pass_arg
)
13087 pass1
= t1
->specific
->pass_arg
;
13090 dummy_args
= gfc_sym_get_dummy_args (t1
->specific
->u
.specific
->n
.sym
);
13092 pass1
= dummy_args
->sym
->name
;
13096 if (t2
->specific
->nopass
)
13098 else if (t2
->specific
->pass_arg
)
13099 pass2
= t2
->specific
->pass_arg
;
13102 dummy_args
= gfc_sym_get_dummy_args (t2
->specific
->u
.specific
->n
.sym
);
13104 pass2
= dummy_args
->sym
->name
;
13109 /* Compare the interfaces. */
13110 if (gfc_compare_interfaces (sym1
, sym2
, sym2
->name
, !t1
->is_operator
, 0,
13111 NULL
, 0, pass1
, pass2
))
13113 gfc_error ("%qs and %qs for GENERIC %qs at %L are ambiguous",
13114 sym1
->name
, sym2
->name
, generic_name
, &where
);
13122 /* Worker function for resolving a generic procedure binding; this is used to
13123 resolve GENERIC as well as user and intrinsic OPERATOR typebound procedures.
13125 The difference between those cases is finding possible inherited bindings
13126 that are overridden, as one has to look for them in tb_sym_root,
13127 tb_uop_root or tb_op, respectively. Thus the caller must already find
13128 the super-type and set p->overridden correctly. */
13131 resolve_tb_generic_targets (gfc_symbol
* super_type
,
13132 gfc_typebound_proc
* p
, const char* name
)
13134 gfc_tbp_generic
* target
;
13135 gfc_symtree
* first_target
;
13136 gfc_symtree
* inherited
;
13138 gcc_assert (p
&& p
->is_generic
);
13140 /* Try to find the specific bindings for the symtrees in our target-list. */
13141 gcc_assert (p
->u
.generic
);
13142 for (target
= p
->u
.generic
; target
; target
= target
->next
)
13143 if (!target
->specific
)
13145 gfc_typebound_proc
* overridden_tbp
;
13146 gfc_tbp_generic
* g
;
13147 const char* target_name
;
13149 target_name
= target
->specific_st
->name
;
13151 /* Defined for this type directly. */
13152 if (target
->specific_st
->n
.tb
&& !target
->specific_st
->n
.tb
->error
)
13154 target
->specific
= target
->specific_st
->n
.tb
;
13155 goto specific_found
;
13158 /* Look for an inherited specific binding. */
13161 inherited
= gfc_find_typebound_proc (super_type
, NULL
, target_name
,
13166 gcc_assert (inherited
->n
.tb
);
13167 target
->specific
= inherited
->n
.tb
;
13168 goto specific_found
;
13172 gfc_error ("Undefined specific binding %qs as target of GENERIC %qs"
13173 " at %L", target_name
, name
, &p
->where
);
13176 /* Once we've found the specific binding, check it is not ambiguous with
13177 other specifics already found or inherited for the same GENERIC. */
13179 gcc_assert (target
->specific
);
13181 /* This must really be a specific binding! */
13182 if (target
->specific
->is_generic
)
13184 gfc_error ("GENERIC %qs at %L must target a specific binding,"
13185 " %qs is GENERIC, too", name
, &p
->where
, target_name
);
13189 /* Check those already resolved on this type directly. */
13190 for (g
= p
->u
.generic
; g
; g
= g
->next
)
13191 if (g
!= target
&& g
->specific
13192 && !check_generic_tbp_ambiguity (target
, g
, name
, p
->where
))
13195 /* Check for ambiguity with inherited specific targets. */
13196 for (overridden_tbp
= p
->overridden
; overridden_tbp
;
13197 overridden_tbp
= overridden_tbp
->overridden
)
13198 if (overridden_tbp
->is_generic
)
13200 for (g
= overridden_tbp
->u
.generic
; g
; g
= g
->next
)
13202 gcc_assert (g
->specific
);
13203 if (!check_generic_tbp_ambiguity (target
, g
, name
, p
->where
))
13209 /* If we attempt to "overwrite" a specific binding, this is an error. */
13210 if (p
->overridden
&& !p
->overridden
->is_generic
)
13212 gfc_error ("GENERIC %qs at %L can't overwrite specific binding with"
13213 " the same name", name
, &p
->where
);
13217 /* Take the SUBROUTINE/FUNCTION attributes of the first specific target, as
13218 all must have the same attributes here. */
13219 first_target
= p
->u
.generic
->specific
->u
.specific
;
13220 gcc_assert (first_target
);
13221 p
->subroutine
= first_target
->n
.sym
->attr
.subroutine
;
13222 p
->function
= first_target
->n
.sym
->attr
.function
;
13228 /* Resolve a GENERIC procedure binding for a derived type. */
13231 resolve_typebound_generic (gfc_symbol
* derived
, gfc_symtree
* st
)
13233 gfc_symbol
* super_type
;
13235 /* Find the overridden binding if any. */
13236 st
->n
.tb
->overridden
= NULL
;
13237 super_type
= gfc_get_derived_super_type (derived
);
13240 gfc_symtree
* overridden
;
13241 overridden
= gfc_find_typebound_proc (super_type
, NULL
, st
->name
,
13244 if (overridden
&& overridden
->n
.tb
)
13245 st
->n
.tb
->overridden
= overridden
->n
.tb
;
13248 /* Resolve using worker function. */
13249 return resolve_tb_generic_targets (super_type
, st
->n
.tb
, st
->name
);
13253 /* Retrieve the target-procedure of an operator binding and do some checks in
13254 common for intrinsic and user-defined type-bound operators. */
13257 get_checked_tb_operator_target (gfc_tbp_generic
* target
, locus where
)
13259 gfc_symbol
* target_proc
;
13261 gcc_assert (target
->specific
&& !target
->specific
->is_generic
);
13262 target_proc
= target
->specific
->u
.specific
->n
.sym
;
13263 gcc_assert (target_proc
);
13265 /* F08:C468. All operator bindings must have a passed-object dummy argument. */
13266 if (target
->specific
->nopass
)
13268 gfc_error ("Type-bound operator at %L can't be NOPASS", &where
);
13272 return target_proc
;
13276 /* Resolve a type-bound intrinsic operator. */
13279 resolve_typebound_intrinsic_op (gfc_symbol
* derived
, gfc_intrinsic_op op
,
13280 gfc_typebound_proc
* p
)
13282 gfc_symbol
* super_type
;
13283 gfc_tbp_generic
* target
;
13285 /* If there's already an error here, do nothing (but don't fail again). */
13289 /* Operators should always be GENERIC bindings. */
13290 gcc_assert (p
->is_generic
);
13292 /* Look for an overridden binding. */
13293 super_type
= gfc_get_derived_super_type (derived
);
13294 if (super_type
&& super_type
->f2k_derived
)
13295 p
->overridden
= gfc_find_typebound_intrinsic_op (super_type
, NULL
,
13298 p
->overridden
= NULL
;
13300 /* Resolve general GENERIC properties using worker function. */
13301 if (!resolve_tb_generic_targets (super_type
, p
, gfc_op2string(op
)))
13304 /* Check the targets to be procedures of correct interface. */
13305 for (target
= p
->u
.generic
; target
; target
= target
->next
)
13307 gfc_symbol
* target_proc
;
13309 target_proc
= get_checked_tb_operator_target (target
, p
->where
);
13313 if (!gfc_check_operator_interface (target_proc
, op
, p
->where
))
13316 /* Add target to non-typebound operator list. */
13317 if (!target
->specific
->deferred
&& !derived
->attr
.use_assoc
13318 && p
->access
!= ACCESS_PRIVATE
&& derived
->ns
== gfc_current_ns
)
13320 gfc_interface
*head
, *intr
;
13322 /* Preempt 'gfc_check_new_interface' for submodules, where the
13323 mechanism for handling module procedures winds up resolving
13324 operator interfaces twice and would otherwise cause an error. */
13325 for (intr
= derived
->ns
->op
[op
]; intr
; intr
= intr
->next
)
13326 if (intr
->sym
== target_proc
13327 && target_proc
->attr
.used_in_submodule
)
13330 if (!gfc_check_new_interface (derived
->ns
->op
[op
],
13331 target_proc
, p
->where
))
13333 head
= derived
->ns
->op
[op
];
13334 intr
= gfc_get_interface ();
13335 intr
->sym
= target_proc
;
13336 intr
->where
= p
->where
;
13338 derived
->ns
->op
[op
] = intr
;
13350 /* Resolve a type-bound user operator (tree-walker callback). */
13352 static gfc_symbol
* resolve_bindings_derived
;
13353 static bool resolve_bindings_result
;
13355 static bool check_uop_procedure (gfc_symbol
* sym
, locus where
);
13358 resolve_typebound_user_op (gfc_symtree
* stree
)
13360 gfc_symbol
* super_type
;
13361 gfc_tbp_generic
* target
;
13363 gcc_assert (stree
&& stree
->n
.tb
);
13365 if (stree
->n
.tb
->error
)
13368 /* Operators should always be GENERIC bindings. */
13369 gcc_assert (stree
->n
.tb
->is_generic
);
13371 /* Find overridden procedure, if any. */
13372 super_type
= gfc_get_derived_super_type (resolve_bindings_derived
);
13373 if (super_type
&& super_type
->f2k_derived
)
13375 gfc_symtree
* overridden
;
13376 overridden
= gfc_find_typebound_user_op (super_type
, NULL
,
13377 stree
->name
, true, NULL
);
13379 if (overridden
&& overridden
->n
.tb
)
13380 stree
->n
.tb
->overridden
= overridden
->n
.tb
;
13383 stree
->n
.tb
->overridden
= NULL
;
13385 /* Resolve basically using worker function. */
13386 if (!resolve_tb_generic_targets (super_type
, stree
->n
.tb
, stree
->name
))
13389 /* Check the targets to be functions of correct interface. */
13390 for (target
= stree
->n
.tb
->u
.generic
; target
; target
= target
->next
)
13392 gfc_symbol
* target_proc
;
13394 target_proc
= get_checked_tb_operator_target (target
, stree
->n
.tb
->where
);
13398 if (!check_uop_procedure (target_proc
, stree
->n
.tb
->where
))
13405 resolve_bindings_result
= false;
13406 stree
->n
.tb
->error
= 1;
13410 /* Resolve the type-bound procedures for a derived type. */
13413 resolve_typebound_procedure (gfc_symtree
* stree
)
13417 gfc_symbol
* me_arg
;
13418 gfc_symbol
* super_type
;
13419 gfc_component
* comp
;
13421 gcc_assert (stree
);
13423 /* Undefined specific symbol from GENERIC target definition. */
13427 if (stree
->n
.tb
->error
)
13430 /* If this is a GENERIC binding, use that routine. */
13431 if (stree
->n
.tb
->is_generic
)
13433 if (!resolve_typebound_generic (resolve_bindings_derived
, stree
))
13438 /* Get the target-procedure to check it. */
13439 gcc_assert (!stree
->n
.tb
->is_generic
);
13440 gcc_assert (stree
->n
.tb
->u
.specific
);
13441 proc
= stree
->n
.tb
->u
.specific
->n
.sym
;
13442 where
= stree
->n
.tb
->where
;
13444 /* Default access should already be resolved from the parser. */
13445 gcc_assert (stree
->n
.tb
->access
!= ACCESS_UNKNOWN
);
13447 if (stree
->n
.tb
->deferred
)
13449 if (!check_proc_interface (proc
, &where
))
13454 /* Check for F08:C465. */
13455 if ((!proc
->attr
.subroutine
&& !proc
->attr
.function
)
13456 || (proc
->attr
.proc
!= PROC_MODULE
13457 && proc
->attr
.if_source
!= IFSRC_IFBODY
)
13458 || proc
->attr
.abstract
)
13460 gfc_error ("%qs must be a module procedure or an external procedure with"
13461 " an explicit interface at %L", proc
->name
, &where
);
13466 stree
->n
.tb
->subroutine
= proc
->attr
.subroutine
;
13467 stree
->n
.tb
->function
= proc
->attr
.function
;
13469 /* Find the super-type of the current derived type. We could do this once and
13470 store in a global if speed is needed, but as long as not I believe this is
13471 more readable and clearer. */
13472 super_type
= gfc_get_derived_super_type (resolve_bindings_derived
);
13474 /* If PASS, resolve and check arguments if not already resolved / loaded
13475 from a .mod file. */
13476 if (!stree
->n
.tb
->nopass
&& stree
->n
.tb
->pass_arg_num
== 0)
13478 gfc_formal_arglist
*dummy_args
;
13480 dummy_args
= gfc_sym_get_dummy_args (proc
);
13481 if (stree
->n
.tb
->pass_arg
)
13483 gfc_formal_arglist
*i
;
13485 /* If an explicit passing argument name is given, walk the arg-list
13486 and look for it. */
13489 stree
->n
.tb
->pass_arg_num
= 1;
13490 for (i
= dummy_args
; i
; i
= i
->next
)
13492 if (!strcmp (i
->sym
->name
, stree
->n
.tb
->pass_arg
))
13497 ++stree
->n
.tb
->pass_arg_num
;
13502 gfc_error ("Procedure %qs with PASS(%s) at %L has no"
13504 proc
->name
, stree
->n
.tb
->pass_arg
, &where
,
13505 stree
->n
.tb
->pass_arg
);
13511 /* Otherwise, take the first one; there should in fact be at least
13513 stree
->n
.tb
->pass_arg_num
= 1;
13516 gfc_error ("Procedure %qs with PASS at %L must have at"
13517 " least one argument", proc
->name
, &where
);
13520 me_arg
= dummy_args
->sym
;
13523 /* Now check that the argument-type matches and the passed-object
13524 dummy argument is generally fine. */
13526 gcc_assert (me_arg
);
13528 if (me_arg
->ts
.type
!= BT_CLASS
)
13530 gfc_error ("Non-polymorphic passed-object dummy argument of %qs"
13531 " at %L", proc
->name
, &where
);
13535 if (CLASS_DATA (me_arg
)->ts
.u
.derived
13536 != resolve_bindings_derived
)
13538 gfc_error ("Argument %qs of %qs with PASS(%s) at %L must be of"
13539 " the derived-type %qs", me_arg
->name
, proc
->name
,
13540 me_arg
->name
, &where
, resolve_bindings_derived
->name
);
13544 gcc_assert (me_arg
->ts
.type
== BT_CLASS
);
13545 if (CLASS_DATA (me_arg
)->as
&& CLASS_DATA (me_arg
)->as
->rank
!= 0)
13547 gfc_error ("Passed-object dummy argument of %qs at %L must be"
13548 " scalar", proc
->name
, &where
);
13551 if (CLASS_DATA (me_arg
)->attr
.allocatable
)
13553 gfc_error ("Passed-object dummy argument of %qs at %L must not"
13554 " be ALLOCATABLE", proc
->name
, &where
);
13557 if (CLASS_DATA (me_arg
)->attr
.class_pointer
)
13559 gfc_error ("Passed-object dummy argument of %qs at %L must not"
13560 " be POINTER", proc
->name
, &where
);
13565 /* If we are extending some type, check that we don't override a procedure
13566 flagged NON_OVERRIDABLE. */
13567 stree
->n
.tb
->overridden
= NULL
;
13570 gfc_symtree
* overridden
;
13571 overridden
= gfc_find_typebound_proc (super_type
, NULL
,
13572 stree
->name
, true, NULL
);
13576 if (overridden
->n
.tb
)
13577 stree
->n
.tb
->overridden
= overridden
->n
.tb
;
13579 if (!gfc_check_typebound_override (stree
, overridden
))
13584 /* See if there's a name collision with a component directly in this type. */
13585 for (comp
= resolve_bindings_derived
->components
; comp
; comp
= comp
->next
)
13586 if (!strcmp (comp
->name
, stree
->name
))
13588 gfc_error ("Procedure %qs at %L has the same name as a component of"
13590 stree
->name
, &where
, resolve_bindings_derived
->name
);
13594 /* Try to find a name collision with an inherited component. */
13595 if (super_type
&& gfc_find_component (super_type
, stree
->name
, true, true,
13598 gfc_error ("Procedure %qs at %L has the same name as an inherited"
13599 " component of %qs",
13600 stree
->name
, &where
, resolve_bindings_derived
->name
);
13604 stree
->n
.tb
->error
= 0;
13608 resolve_bindings_result
= false;
13609 stree
->n
.tb
->error
= 1;
13614 resolve_typebound_procedures (gfc_symbol
* derived
)
13617 gfc_symbol
* super_type
;
13619 if (!derived
->f2k_derived
|| !derived
->f2k_derived
->tb_sym_root
)
13622 super_type
= gfc_get_derived_super_type (derived
);
13624 resolve_symbol (super_type
);
13626 resolve_bindings_derived
= derived
;
13627 resolve_bindings_result
= true;
13629 if (derived
->f2k_derived
->tb_sym_root
)
13630 gfc_traverse_symtree (derived
->f2k_derived
->tb_sym_root
,
13631 &resolve_typebound_procedure
);
13633 if (derived
->f2k_derived
->tb_uop_root
)
13634 gfc_traverse_symtree (derived
->f2k_derived
->tb_uop_root
,
13635 &resolve_typebound_user_op
);
13637 for (op
= 0; op
!= GFC_INTRINSIC_OPS
; ++op
)
13639 gfc_typebound_proc
* p
= derived
->f2k_derived
->tb_op
[op
];
13640 if (p
&& !resolve_typebound_intrinsic_op (derived
,
13641 (gfc_intrinsic_op
)op
, p
))
13642 resolve_bindings_result
= false;
13645 return resolve_bindings_result
;
13649 /* Add a derived type to the dt_list. The dt_list is used in trans-types.c
13650 to give all identical derived types the same backend_decl. */
13652 add_dt_to_dt_list (gfc_symbol
*derived
)
13654 if (!derived
->dt_next
)
13656 if (gfc_derived_types
)
13658 derived
->dt_next
= gfc_derived_types
->dt_next
;
13659 gfc_derived_types
->dt_next
= derived
;
13663 derived
->dt_next
= derived
;
13665 gfc_derived_types
= derived
;
13670 /* Ensure that a derived-type is really not abstract, meaning that every
13671 inherited DEFERRED binding is overridden by a non-DEFERRED one. */
13674 ensure_not_abstract_walker (gfc_symbol
* sub
, gfc_symtree
* st
)
13679 if (!ensure_not_abstract_walker (sub
, st
->left
))
13681 if (!ensure_not_abstract_walker (sub
, st
->right
))
13684 if (st
->n
.tb
&& st
->n
.tb
->deferred
)
13686 gfc_symtree
* overriding
;
13687 overriding
= gfc_find_typebound_proc (sub
, NULL
, st
->name
, true, NULL
);
13690 gcc_assert (overriding
->n
.tb
);
13691 if (overriding
->n
.tb
->deferred
)
13693 gfc_error ("Derived-type %qs declared at %L must be ABSTRACT because"
13694 " %qs is DEFERRED and not overridden",
13695 sub
->name
, &sub
->declared_at
, st
->name
);
13704 ensure_not_abstract (gfc_symbol
* sub
, gfc_symbol
* ancestor
)
13706 /* The algorithm used here is to recursively travel up the ancestry of sub
13707 and for each ancestor-type, check all bindings. If any of them is
13708 DEFERRED, look it up starting from sub and see if the found (overriding)
13709 binding is not DEFERRED.
13710 This is not the most efficient way to do this, but it should be ok and is
13711 clearer than something sophisticated. */
13713 gcc_assert (ancestor
&& !sub
->attr
.abstract
);
13715 if (!ancestor
->attr
.abstract
)
13718 /* Walk bindings of this ancestor. */
13719 if (ancestor
->f2k_derived
)
13722 t
= ensure_not_abstract_walker (sub
, ancestor
->f2k_derived
->tb_sym_root
);
13727 /* Find next ancestor type and recurse on it. */
13728 ancestor
= gfc_get_derived_super_type (ancestor
);
13730 return ensure_not_abstract (sub
, ancestor
);
13736 /* This check for typebound defined assignments is done recursively
13737 since the order in which derived types are resolved is not always in
13738 order of the declarations. */
13741 check_defined_assignments (gfc_symbol
*derived
)
13745 for (c
= derived
->components
; c
; c
= c
->next
)
13747 if (!gfc_bt_struct (c
->ts
.type
)
13749 || c
->attr
.allocatable
13750 || c
->attr
.proc_pointer_comp
13751 || c
->attr
.class_pointer
13752 || c
->attr
.proc_pointer
)
13755 if (c
->ts
.u
.derived
->attr
.defined_assign_comp
13756 || (c
->ts
.u
.derived
->f2k_derived
13757 && c
->ts
.u
.derived
->f2k_derived
->tb_op
[INTRINSIC_ASSIGN
]))
13759 derived
->attr
.defined_assign_comp
= 1;
13763 check_defined_assignments (c
->ts
.u
.derived
);
13764 if (c
->ts
.u
.derived
->attr
.defined_assign_comp
)
13766 derived
->attr
.defined_assign_comp
= 1;
13773 /* Resolve a single component of a derived type or structure. */
13776 resolve_component (gfc_component
*c
, gfc_symbol
*sym
)
13778 gfc_symbol
*super_type
;
13779 symbol_attribute
*attr
;
13781 if (c
->attr
.artificial
)
13784 /* Do not allow vtype components to be resolved in nameless namespaces
13785 such as block data because the procedure pointers will cause ICEs
13786 and vtables are not needed in these contexts. */
13787 if (sym
->attr
.vtype
&& sym
->attr
.use_assoc
13788 && sym
->ns
->proc_name
== NULL
)
13792 if ((!sym
->attr
.is_class
|| c
!= sym
->components
)
13793 && c
->attr
.codimension
13794 && (!c
->attr
.allocatable
|| (c
->as
&& c
->as
->type
!= AS_DEFERRED
)))
13796 gfc_error ("Coarray component %qs at %L must be allocatable with "
13797 "deferred shape", c
->name
, &c
->loc
);
13802 if (c
->attr
.codimension
&& c
->ts
.type
== BT_DERIVED
13803 && c
->ts
.u
.derived
->ts
.is_iso_c
)
13805 gfc_error ("Component %qs at %L of TYPE(C_PTR) or TYPE(C_FUNPTR) "
13806 "shall not be a coarray", c
->name
, &c
->loc
);
13811 if (gfc_bt_struct (c
->ts
.type
) && c
->ts
.u
.derived
->attr
.coarray_comp
13812 && (c
->attr
.codimension
|| c
->attr
.pointer
|| c
->attr
.dimension
13813 || c
->attr
.allocatable
))
13815 gfc_error ("Component %qs at %L with coarray component "
13816 "shall be a nonpointer, nonallocatable scalar",
13822 if (c
->ts
.type
== BT_CLASS
)
13824 if (CLASS_DATA (c
))
13826 attr
= &(CLASS_DATA (c
)->attr
);
13828 /* Fix up contiguous attribute. */
13829 if (c
->attr
.contiguous
)
13830 attr
->contiguous
= 1;
13838 if (attr
&& attr
->contiguous
&& (!attr
->dimension
|| !attr
->pointer
))
13840 gfc_error ("Component %qs at %L has the CONTIGUOUS attribute but "
13841 "is not an array pointer", c
->name
, &c
->loc
);
13845 /* F2003, 15.2.1 - length has to be one. */
13846 if (sym
->attr
.is_bind_c
&& c
->ts
.type
== BT_CHARACTER
13847 && (c
->ts
.u
.cl
== NULL
|| c
->ts
.u
.cl
->length
== NULL
13848 || !gfc_is_constant_expr (c
->ts
.u
.cl
->length
)
13849 || mpz_cmp_si (c
->ts
.u
.cl
->length
->value
.integer
, 1) != 0))
13851 gfc_error ("Component %qs of BIND(C) type at %L must have length one",
13856 if (c
->attr
.proc_pointer
&& c
->ts
.interface
)
13858 gfc_symbol
*ifc
= c
->ts
.interface
;
13860 if (!sym
->attr
.vtype
&& !check_proc_interface (ifc
, &c
->loc
))
13866 if (ifc
->attr
.if_source
|| ifc
->attr
.intrinsic
)
13868 /* Resolve interface and copy attributes. */
13869 if (ifc
->formal
&& !ifc
->formal_ns
)
13870 resolve_symbol (ifc
);
13871 if (ifc
->attr
.intrinsic
)
13872 gfc_resolve_intrinsic (ifc
, &ifc
->declared_at
);
13876 c
->ts
= ifc
->result
->ts
;
13877 c
->attr
.allocatable
= ifc
->result
->attr
.allocatable
;
13878 c
->attr
.pointer
= ifc
->result
->attr
.pointer
;
13879 c
->attr
.dimension
= ifc
->result
->attr
.dimension
;
13880 c
->as
= gfc_copy_array_spec (ifc
->result
->as
);
13881 c
->attr
.class_ok
= ifc
->result
->attr
.class_ok
;
13886 c
->attr
.allocatable
= ifc
->attr
.allocatable
;
13887 c
->attr
.pointer
= ifc
->attr
.pointer
;
13888 c
->attr
.dimension
= ifc
->attr
.dimension
;
13889 c
->as
= gfc_copy_array_spec (ifc
->as
);
13890 c
->attr
.class_ok
= ifc
->attr
.class_ok
;
13892 c
->ts
.interface
= ifc
;
13893 c
->attr
.function
= ifc
->attr
.function
;
13894 c
->attr
.subroutine
= ifc
->attr
.subroutine
;
13896 c
->attr
.pure
= ifc
->attr
.pure
;
13897 c
->attr
.elemental
= ifc
->attr
.elemental
;
13898 c
->attr
.recursive
= ifc
->attr
.recursive
;
13899 c
->attr
.always_explicit
= ifc
->attr
.always_explicit
;
13900 c
->attr
.ext_attr
|= ifc
->attr
.ext_attr
;
13901 /* Copy char length. */
13902 if (ifc
->ts
.type
== BT_CHARACTER
&& ifc
->ts
.u
.cl
)
13904 gfc_charlen
*cl
= gfc_new_charlen (sym
->ns
, ifc
->ts
.u
.cl
);
13905 if (cl
->length
&& !cl
->resolved
13906 && !gfc_resolve_expr (cl
->length
))
13915 else if (c
->attr
.proc_pointer
&& c
->ts
.type
== BT_UNKNOWN
)
13917 /* Since PPCs are not implicitly typed, a PPC without an explicit
13918 interface must be a subroutine. */
13919 gfc_add_subroutine (&c
->attr
, c
->name
, &c
->loc
);
13922 /* Procedure pointer components: Check PASS arg. */
13923 if (c
->attr
.proc_pointer
&& !c
->tb
->nopass
&& c
->tb
->pass_arg_num
== 0
13924 && !sym
->attr
.vtype
)
13926 gfc_symbol
* me_arg
;
13928 if (c
->tb
->pass_arg
)
13930 gfc_formal_arglist
* i
;
13932 /* If an explicit passing argument name is given, walk the arg-list
13933 and look for it. */
13936 c
->tb
->pass_arg_num
= 1;
13937 for (i
= c
->ts
.interface
->formal
; i
; i
= i
->next
)
13939 if (!strcmp (i
->sym
->name
, c
->tb
->pass_arg
))
13944 c
->tb
->pass_arg_num
++;
13949 gfc_error ("Procedure pointer component %qs with PASS(%s) "
13950 "at %L has no argument %qs", c
->name
,
13951 c
->tb
->pass_arg
, &c
->loc
, c
->tb
->pass_arg
);
13958 /* Otherwise, take the first one; there should in fact be at least
13960 c
->tb
->pass_arg_num
= 1;
13961 if (!c
->ts
.interface
->formal
)
13963 gfc_error ("Procedure pointer component %qs with PASS at %L "
13964 "must have at least one argument",
13969 me_arg
= c
->ts
.interface
->formal
->sym
;
13972 /* Now check that the argument-type matches. */
13973 gcc_assert (me_arg
);
13974 if ((me_arg
->ts
.type
!= BT_DERIVED
&& me_arg
->ts
.type
!= BT_CLASS
)
13975 || (me_arg
->ts
.type
== BT_DERIVED
&& me_arg
->ts
.u
.derived
!= sym
)
13976 || (me_arg
->ts
.type
== BT_CLASS
13977 && CLASS_DATA (me_arg
)->ts
.u
.derived
!= sym
))
13979 gfc_error ("Argument %qs of %qs with PASS(%s) at %L must be of"
13980 " the derived type %qs", me_arg
->name
, c
->name
,
13981 me_arg
->name
, &c
->loc
, sym
->name
);
13986 /* Check for F03:C453. */
13987 if (CLASS_DATA (me_arg
)->attr
.dimension
)
13989 gfc_error ("Argument %qs of %qs with PASS(%s) at %L "
13990 "must be scalar", me_arg
->name
, c
->name
, me_arg
->name
,
13996 if (CLASS_DATA (me_arg
)->attr
.class_pointer
)
13998 gfc_error ("Argument %qs of %qs with PASS(%s) at %L "
13999 "may not have the POINTER attribute", me_arg
->name
,
14000 c
->name
, me_arg
->name
, &c
->loc
);
14005 if (CLASS_DATA (me_arg
)->attr
.allocatable
)
14007 gfc_error ("Argument %qs of %qs with PASS(%s) at %L "
14008 "may not be ALLOCATABLE", me_arg
->name
, c
->name
,
14009 me_arg
->name
, &c
->loc
);
14014 if (gfc_type_is_extensible (sym
) && me_arg
->ts
.type
!= BT_CLASS
)
14016 gfc_error ("Non-polymorphic passed-object dummy argument of %qs"
14017 " at %L", c
->name
, &c
->loc
);
14023 /* Check type-spec if this is not the parent-type component. */
14024 if (((sym
->attr
.is_class
14025 && (!sym
->components
->ts
.u
.derived
->attr
.extension
14026 || c
!= sym
->components
->ts
.u
.derived
->components
))
14027 || (!sym
->attr
.is_class
14028 && (!sym
->attr
.extension
|| c
!= sym
->components
)))
14029 && !sym
->attr
.vtype
14030 && !resolve_typespec_used (&c
->ts
, &c
->loc
, c
->name
))
14033 super_type
= gfc_get_derived_super_type (sym
);
14035 /* If this type is an extension, set the accessibility of the parent
14038 && ((sym
->attr
.is_class
14039 && c
== sym
->components
->ts
.u
.derived
->components
)
14040 || (!sym
->attr
.is_class
&& c
== sym
->components
))
14041 && strcmp (super_type
->name
, c
->name
) == 0)
14042 c
->attr
.access
= super_type
->attr
.access
;
14044 /* If this type is an extension, see if this component has the same name
14045 as an inherited type-bound procedure. */
14046 if (super_type
&& !sym
->attr
.is_class
14047 && gfc_find_typebound_proc (super_type
, NULL
, c
->name
, true, NULL
))
14049 gfc_error ("Component %qs of %qs at %L has the same name as an"
14050 " inherited type-bound procedure",
14051 c
->name
, sym
->name
, &c
->loc
);
14055 if (c
->ts
.type
== BT_CHARACTER
&& !c
->attr
.proc_pointer
14056 && !c
->ts
.deferred
)
14058 if (c
->ts
.u
.cl
->length
== NULL
14059 || (!resolve_charlen(c
->ts
.u
.cl
))
14060 || !gfc_is_constant_expr (c
->ts
.u
.cl
->length
))
14062 gfc_error ("Character length of component %qs needs to "
14063 "be a constant specification expression at %L",
14065 c
->ts
.u
.cl
->length
? &c
->ts
.u
.cl
->length
->where
: &c
->loc
);
14070 if (c
->ts
.type
== BT_CHARACTER
&& c
->ts
.deferred
14071 && !c
->attr
.pointer
&& !c
->attr
.allocatable
)
14073 gfc_error ("Character component %qs of %qs at %L with deferred "
14074 "length must be a POINTER or ALLOCATABLE",
14075 c
->name
, sym
->name
, &c
->loc
);
14079 /* Add the hidden deferred length field. */
14080 if (c
->ts
.type
== BT_CHARACTER
14081 && (c
->ts
.deferred
|| c
->attr
.pdt_string
)
14082 && !c
->attr
.function
14083 && !sym
->attr
.is_class
)
14085 char name
[GFC_MAX_SYMBOL_LEN
+9];
14086 gfc_component
*strlen
;
14087 sprintf (name
, "_%s_length", c
->name
);
14088 strlen
= gfc_find_component (sym
, name
, true, true, NULL
);
14089 if (strlen
== NULL
)
14091 if (!gfc_add_component (sym
, name
, &strlen
))
14093 strlen
->ts
.type
= BT_INTEGER
;
14094 strlen
->ts
.kind
= gfc_charlen_int_kind
;
14095 strlen
->attr
.access
= ACCESS_PRIVATE
;
14096 strlen
->attr
.artificial
= 1;
14100 if (c
->ts
.type
== BT_DERIVED
14101 && sym
->component_access
!= ACCESS_PRIVATE
14102 && gfc_check_symbol_access (sym
)
14103 && !is_sym_host_assoc (c
->ts
.u
.derived
, sym
->ns
)
14104 && !c
->ts
.u
.derived
->attr
.use_assoc
14105 && !gfc_check_symbol_access (c
->ts
.u
.derived
)
14106 && !gfc_notify_std (GFC_STD_F2003
, "the component %qs is a "
14107 "PRIVATE type and cannot be a component of "
14108 "%qs, which is PUBLIC at %L", c
->name
,
14109 sym
->name
, &sym
->declared_at
))
14112 if ((sym
->attr
.sequence
|| sym
->attr
.is_bind_c
) && c
->ts
.type
== BT_CLASS
)
14114 gfc_error ("Polymorphic component %s at %L in SEQUENCE or BIND(C) "
14115 "type %s", c
->name
, &c
->loc
, sym
->name
);
14119 if (sym
->attr
.sequence
)
14121 if (c
->ts
.type
== BT_DERIVED
&& c
->ts
.u
.derived
->attr
.sequence
== 0)
14123 gfc_error ("Component %s of SEQUENCE type declared at %L does "
14124 "not have the SEQUENCE attribute",
14125 c
->ts
.u
.derived
->name
, &sym
->declared_at
);
14130 if (c
->ts
.type
== BT_DERIVED
&& c
->ts
.u
.derived
->attr
.generic
)
14131 c
->ts
.u
.derived
= gfc_find_dt_in_generic (c
->ts
.u
.derived
);
14132 else if (c
->ts
.type
== BT_CLASS
&& c
->attr
.class_ok
14133 && CLASS_DATA (c
)->ts
.u
.derived
->attr
.generic
)
14134 CLASS_DATA (c
)->ts
.u
.derived
14135 = gfc_find_dt_in_generic (CLASS_DATA (c
)->ts
.u
.derived
);
14137 /* If an allocatable component derived type is of the same type as
14138 the enclosing derived type, we need a vtable generating so that
14139 the __deallocate procedure is created. */
14140 if ((c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
14141 && c
->ts
.u
.derived
== sym
&& c
->attr
.allocatable
== 1)
14142 gfc_find_vtab (&c
->ts
);
14144 /* Ensure that all the derived type components are put on the
14145 derived type list; even in formal namespaces, where derived type
14146 pointer components might not have been declared. */
14147 if (c
->ts
.type
== BT_DERIVED
14149 && c
->ts
.u
.derived
->components
14151 && sym
!= c
->ts
.u
.derived
)
14152 add_dt_to_dt_list (c
->ts
.u
.derived
);
14154 if (!gfc_resolve_array_spec (c
->as
,
14155 !(c
->attr
.pointer
|| c
->attr
.proc_pointer
14156 || c
->attr
.allocatable
)))
14159 if (c
->initializer
&& !sym
->attr
.vtype
14160 && !c
->attr
.pdt_kind
&& !c
->attr
.pdt_len
14161 && !gfc_check_assign_symbol (sym
, c
, c
->initializer
))
14168 /* Be nice about the locus for a structure expression - show the locus of the
14169 first non-null sub-expression if we can. */
14172 cons_where (gfc_expr
*struct_expr
)
14174 gfc_constructor
*cons
;
14176 gcc_assert (struct_expr
&& struct_expr
->expr_type
== EXPR_STRUCTURE
);
14178 cons
= gfc_constructor_first (struct_expr
->value
.constructor
);
14179 for (; cons
; cons
= gfc_constructor_next (cons
))
14181 if (cons
->expr
&& cons
->expr
->expr_type
!= EXPR_NULL
)
14182 return &cons
->expr
->where
;
14185 return &struct_expr
->where
;
14188 /* Resolve the components of a structure type. Much less work than derived
14192 resolve_fl_struct (gfc_symbol
*sym
)
14195 gfc_expr
*init
= NULL
;
14198 /* Make sure UNIONs do not have overlapping initializers. */
14199 if (sym
->attr
.flavor
== FL_UNION
)
14201 for (c
= sym
->components
; c
; c
= c
->next
)
14203 if (init
&& c
->initializer
)
14205 gfc_error ("Conflicting initializers in union at %L and %L",
14206 cons_where (init
), cons_where (c
->initializer
));
14207 gfc_free_expr (c
->initializer
);
14208 c
->initializer
= NULL
;
14211 init
= c
->initializer
;
14216 for (c
= sym
->components
; c
; c
= c
->next
)
14217 if (!resolve_component (c
, sym
))
14223 if (sym
->components
)
14224 add_dt_to_dt_list (sym
);
14230 /* Resolve the components of a derived type. This does not have to wait until
14231 resolution stage, but can be done as soon as the dt declaration has been
14235 resolve_fl_derived0 (gfc_symbol
*sym
)
14237 gfc_symbol
* super_type
;
14239 gfc_formal_arglist
*f
;
14242 if (sym
->attr
.unlimited_polymorphic
)
14245 super_type
= gfc_get_derived_super_type (sym
);
14248 if (super_type
&& sym
->attr
.coarray_comp
&& !super_type
->attr
.coarray_comp
)
14250 gfc_error ("As extending type %qs at %L has a coarray component, "
14251 "parent type %qs shall also have one", sym
->name
,
14252 &sym
->declared_at
, super_type
->name
);
14256 /* Ensure the extended type gets resolved before we do. */
14257 if (super_type
&& !resolve_fl_derived0 (super_type
))
14260 /* An ABSTRACT type must be extensible. */
14261 if (sym
->attr
.abstract
&& !gfc_type_is_extensible (sym
))
14263 gfc_error ("Non-extensible derived-type %qs at %L must not be ABSTRACT",
14264 sym
->name
, &sym
->declared_at
);
14268 c
= (sym
->attr
.is_class
) ? sym
->components
->ts
.u
.derived
->components
14272 for ( ; c
!= NULL
; c
= c
->next
)
14273 if (!resolve_component (c
, sym
))
14279 /* Now add the caf token field, where needed. */
14280 if (flag_coarray
!= GFC_FCOARRAY_NONE
14281 && !sym
->attr
.is_class
&& !sym
->attr
.vtype
)
14283 for (c
= sym
->components
; c
; c
= c
->next
)
14284 if (!c
->attr
.dimension
&& !c
->attr
.codimension
14285 && (c
->attr
.allocatable
|| c
->attr
.pointer
))
14287 char name
[GFC_MAX_SYMBOL_LEN
+9];
14288 gfc_component
*token
;
14289 sprintf (name
, "_caf_%s", c
->name
);
14290 token
= gfc_find_component (sym
, name
, true, true, NULL
);
14293 if (!gfc_add_component (sym
, name
, &token
))
14295 token
->ts
.type
= BT_VOID
;
14296 token
->ts
.kind
= gfc_default_integer_kind
;
14297 token
->attr
.access
= ACCESS_PRIVATE
;
14298 token
->attr
.artificial
= 1;
14299 token
->attr
.caf_token
= 1;
14304 check_defined_assignments (sym
);
14306 if (!sym
->attr
.defined_assign_comp
&& super_type
)
14307 sym
->attr
.defined_assign_comp
14308 = super_type
->attr
.defined_assign_comp
;
14310 /* If this is a non-ABSTRACT type extending an ABSTRACT one, ensure that
14311 all DEFERRED bindings are overridden. */
14312 if (super_type
&& super_type
->attr
.abstract
&& !sym
->attr
.abstract
14313 && !sym
->attr
.is_class
14314 && !ensure_not_abstract (sym
, super_type
))
14317 /* Check that there is a component for every PDT parameter. */
14318 if (sym
->attr
.pdt_template
)
14320 for (f
= sym
->formal
; f
; f
= f
->next
)
14324 c
= gfc_find_component (sym
, f
->sym
->name
, true, true, NULL
);
14327 gfc_error ("Parameterized type %qs does not have a component "
14328 "corresponding to parameter %qs at %L", sym
->name
,
14329 f
->sym
->name
, &sym
->declared_at
);
14335 /* Add derived type to the derived type list. */
14336 add_dt_to_dt_list (sym
);
14342 /* The following procedure does the full resolution of a derived type,
14343 including resolution of all type-bound procedures (if present). In contrast
14344 to 'resolve_fl_derived0' this can only be done after the module has been
14345 parsed completely. */
14348 resolve_fl_derived (gfc_symbol
*sym
)
14350 gfc_symbol
*gen_dt
= NULL
;
14352 if (sym
->attr
.unlimited_polymorphic
)
14355 if (!sym
->attr
.is_class
)
14356 gfc_find_symbol (sym
->name
, sym
->ns
, 0, &gen_dt
);
14357 if (gen_dt
&& gen_dt
->generic
&& gen_dt
->generic
->next
14358 && (!gen_dt
->generic
->sym
->attr
.use_assoc
14359 || gen_dt
->generic
->sym
->module
!= gen_dt
->generic
->next
->sym
->module
)
14360 && !gfc_notify_std (GFC_STD_F2003
, "Generic name %qs of function "
14361 "%qs at %L being the same name as derived "
14362 "type at %L", sym
->name
,
14363 gen_dt
->generic
->sym
== sym
14364 ? gen_dt
->generic
->next
->sym
->name
14365 : gen_dt
->generic
->sym
->name
,
14366 gen_dt
->generic
->sym
== sym
14367 ? &gen_dt
->generic
->next
->sym
->declared_at
14368 : &gen_dt
->generic
->sym
->declared_at
,
14369 &sym
->declared_at
))
14372 if (sym
->components
== NULL
&& !sym
->attr
.zero_comp
&& !sym
->attr
.use_assoc
)
14374 gfc_error ("Derived type %qs at %L has not been declared",
14375 sym
->name
, &sym
->declared_at
);
14379 /* Resolve the finalizer procedures. */
14380 if (!gfc_resolve_finalizers (sym
, NULL
))
14383 if (sym
->attr
.is_class
&& sym
->ts
.u
.derived
== NULL
)
14385 /* Fix up incomplete CLASS symbols. */
14386 gfc_component
*data
= gfc_find_component (sym
, "_data", true, true, NULL
);
14387 gfc_component
*vptr
= gfc_find_component (sym
, "_vptr", true, true, NULL
);
14389 /* Nothing more to do for unlimited polymorphic entities. */
14390 if (data
->ts
.u
.derived
->attr
.unlimited_polymorphic
)
14392 else if (vptr
->ts
.u
.derived
== NULL
)
14394 gfc_symbol
*vtab
= gfc_find_derived_vtab (data
->ts
.u
.derived
);
14396 vptr
->ts
.u
.derived
= vtab
->ts
.u
.derived
;
14397 if (!resolve_fl_derived0 (vptr
->ts
.u
.derived
))
14402 if (!resolve_fl_derived0 (sym
))
14405 /* Resolve the type-bound procedures. */
14406 if (!resolve_typebound_procedures (sym
))
14409 /* Generate module vtables subject to their accessibility and their not
14410 being vtables or pdt templates. If this is not done class declarations
14411 in external procedures wind up with their own version and so SELECT TYPE
14412 fails because the vptrs do not have the same address. */
14413 if (gfc_option
.allow_std
& GFC_STD_F2003
14414 && sym
->ns
->proc_name
14415 && sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
14416 && sym
->attr
.access
!= ACCESS_PRIVATE
14417 && !(sym
->attr
.use_assoc
|| sym
->attr
.vtype
|| sym
->attr
.pdt_template
))
14419 gfc_symbol
*vtab
= gfc_find_derived_vtab (sym
);
14420 gfc_set_sym_referenced (vtab
);
14428 resolve_fl_namelist (gfc_symbol
*sym
)
14433 for (nl
= sym
->namelist
; nl
; nl
= nl
->next
)
14435 /* Check again, the check in match only works if NAMELIST comes
14437 if (nl
->sym
->as
&& nl
->sym
->as
->type
== AS_ASSUMED_SIZE
)
14439 gfc_error ("Assumed size array %qs in namelist %qs at %L is not "
14440 "allowed", nl
->sym
->name
, sym
->name
, &sym
->declared_at
);
14444 if (nl
->sym
->as
&& nl
->sym
->as
->type
== AS_ASSUMED_SHAPE
14445 && !gfc_notify_std (GFC_STD_F2003
, "NAMELIST array object %qs "
14446 "with assumed shape in namelist %qs at %L",
14447 nl
->sym
->name
, sym
->name
, &sym
->declared_at
))
14450 if (is_non_constant_shape_array (nl
->sym
)
14451 && !gfc_notify_std (GFC_STD_F2003
, "NAMELIST array object %qs "
14452 "with nonconstant shape in namelist %qs at %L",
14453 nl
->sym
->name
, sym
->name
, &sym
->declared_at
))
14456 if (nl
->sym
->ts
.type
== BT_CHARACTER
14457 && (nl
->sym
->ts
.u
.cl
->length
== NULL
14458 || !gfc_is_constant_expr (nl
->sym
->ts
.u
.cl
->length
))
14459 && !gfc_notify_std (GFC_STD_F2003
, "NAMELIST object %qs with "
14460 "nonconstant character length in "
14461 "namelist %qs at %L", nl
->sym
->name
,
14462 sym
->name
, &sym
->declared_at
))
14467 /* Reject PRIVATE objects in a PUBLIC namelist. */
14468 if (gfc_check_symbol_access (sym
))
14470 for (nl
= sym
->namelist
; nl
; nl
= nl
->next
)
14472 if (!nl
->sym
->attr
.use_assoc
14473 && !is_sym_host_assoc (nl
->sym
, sym
->ns
)
14474 && !gfc_check_symbol_access (nl
->sym
))
14476 gfc_error ("NAMELIST object %qs was declared PRIVATE and "
14477 "cannot be member of PUBLIC namelist %qs at %L",
14478 nl
->sym
->name
, sym
->name
, &sym
->declared_at
);
14482 if (nl
->sym
->ts
.type
== BT_DERIVED
14483 && (nl
->sym
->ts
.u
.derived
->attr
.alloc_comp
14484 || nl
->sym
->ts
.u
.derived
->attr
.pointer_comp
))
14486 if (!gfc_notify_std (GFC_STD_F2003
, "NAMELIST object %qs in "
14487 "namelist %qs at %L with ALLOCATABLE "
14488 "or POINTER components", nl
->sym
->name
,
14489 sym
->name
, &sym
->declared_at
))
14494 /* Types with private components that came here by USE-association. */
14495 if (nl
->sym
->ts
.type
== BT_DERIVED
14496 && derived_inaccessible (nl
->sym
->ts
.u
.derived
))
14498 gfc_error ("NAMELIST object %qs has use-associated PRIVATE "
14499 "components and cannot be member of namelist %qs at %L",
14500 nl
->sym
->name
, sym
->name
, &sym
->declared_at
);
14504 /* Types with private components that are defined in the same module. */
14505 if (nl
->sym
->ts
.type
== BT_DERIVED
14506 && !is_sym_host_assoc (nl
->sym
->ts
.u
.derived
, sym
->ns
)
14507 && nl
->sym
->ts
.u
.derived
->attr
.private_comp
)
14509 gfc_error ("NAMELIST object %qs has PRIVATE components and "
14510 "cannot be a member of PUBLIC namelist %qs at %L",
14511 nl
->sym
->name
, sym
->name
, &sym
->declared_at
);
14518 /* 14.1.2 A module or internal procedure represent local entities
14519 of the same type as a namelist member and so are not allowed. */
14520 for (nl
= sym
->namelist
; nl
; nl
= nl
->next
)
14522 if (nl
->sym
->ts
.kind
!= 0 && nl
->sym
->attr
.flavor
== FL_VARIABLE
)
14525 if (nl
->sym
->attr
.function
&& nl
->sym
== nl
->sym
->result
)
14526 if ((nl
->sym
== sym
->ns
->proc_name
)
14528 (sym
->ns
->parent
&& nl
->sym
== sym
->ns
->parent
->proc_name
))
14533 gfc_find_symbol (nl
->sym
->name
, sym
->ns
, 1, &nlsym
);
14534 if (nlsym
&& nlsym
->attr
.flavor
== FL_PROCEDURE
)
14536 gfc_error ("PROCEDURE attribute conflicts with NAMELIST "
14537 "attribute in %qs at %L", nlsym
->name
,
14538 &sym
->declared_at
);
14545 for (nl
= sym
->namelist
; nl
; nl
= nl
->next
)
14546 nl
->sym
->attr
.asynchronous
= 1;
14553 resolve_fl_parameter (gfc_symbol
*sym
)
14555 /* A parameter array's shape needs to be constant. */
14556 if (sym
->as
!= NULL
14557 && (sym
->as
->type
== AS_DEFERRED
14558 || is_non_constant_shape_array (sym
)))
14560 gfc_error ("Parameter array %qs at %L cannot be automatic "
14561 "or of deferred shape", sym
->name
, &sym
->declared_at
);
14565 /* Constraints on deferred type parameter. */
14566 if (!deferred_requirements (sym
))
14569 /* Make sure a parameter that has been implicitly typed still
14570 matches the implicit type, since PARAMETER statements can precede
14571 IMPLICIT statements. */
14572 if (sym
->attr
.implicit_type
14573 && !gfc_compare_types (&sym
->ts
, gfc_get_default_type (sym
->name
,
14576 gfc_error ("Implicitly typed PARAMETER %qs at %L doesn't match a "
14577 "later IMPLICIT type", sym
->name
, &sym
->declared_at
);
14581 /* Make sure the types of derived parameters are consistent. This
14582 type checking is deferred until resolution because the type may
14583 refer to a derived type from the host. */
14584 if (sym
->ts
.type
== BT_DERIVED
14585 && !gfc_compare_types (&sym
->ts
, &sym
->value
->ts
))
14587 gfc_error ("Incompatible derived type in PARAMETER at %L",
14588 &sym
->value
->where
);
14592 /* F03:C509,C514. */
14593 if (sym
->ts
.type
== BT_CLASS
)
14595 gfc_error ("CLASS variable %qs at %L cannot have the PARAMETER attribute",
14596 sym
->name
, &sym
->declared_at
);
14604 /* Called by resolve_symbol to check PDTs. */
14607 resolve_pdt (gfc_symbol
* sym
)
14609 gfc_symbol
*derived
= NULL
;
14610 gfc_actual_arglist
*param
;
14612 bool const_len_exprs
= true;
14613 bool assumed_len_exprs
= false;
14614 symbol_attribute
*attr
;
14616 if (sym
->ts
.type
== BT_DERIVED
)
14618 derived
= sym
->ts
.u
.derived
;
14619 attr
= &(sym
->attr
);
14621 else if (sym
->ts
.type
== BT_CLASS
)
14623 derived
= CLASS_DATA (sym
)->ts
.u
.derived
;
14624 attr
= &(CLASS_DATA (sym
)->attr
);
14627 gcc_unreachable ();
14629 gcc_assert (derived
->attr
.pdt_type
);
14631 for (param
= sym
->param_list
; param
; param
= param
->next
)
14633 c
= gfc_find_component (derived
, param
->name
, false, true, NULL
);
14635 if (c
->attr
.pdt_kind
)
14638 if (param
->expr
&& !gfc_is_constant_expr (param
->expr
)
14639 && c
->attr
.pdt_len
)
14640 const_len_exprs
= false;
14641 else if (param
->spec_type
== SPEC_ASSUMED
)
14642 assumed_len_exprs
= true;
14644 if (param
->spec_type
== SPEC_DEFERRED
14645 && !attr
->allocatable
&& !attr
->pointer
)
14646 gfc_error ("The object %qs at %L has a deferred LEN "
14647 "parameter %qs and is neither allocatable "
14648 "nor a pointer", sym
->name
, &sym
->declared_at
,
14653 if (!const_len_exprs
14654 && (sym
->ns
->proc_name
->attr
.is_main_program
14655 || sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
14656 || sym
->attr
.save
!= SAVE_NONE
))
14657 gfc_error ("The AUTOMATIC object %qs at %L must not have the "
14658 "SAVE attribute or be a variable declared in the "
14659 "main program, a module or a submodule(F08/C513)",
14660 sym
->name
, &sym
->declared_at
);
14662 if (assumed_len_exprs
&& !(sym
->attr
.dummy
14663 || sym
->attr
.select_type_temporary
|| sym
->attr
.associate_var
))
14664 gfc_error ("The object %qs at %L with ASSUMED type parameters "
14665 "must be a dummy or a SELECT TYPE selector(F08/4.2)",
14666 sym
->name
, &sym
->declared_at
);
14670 /* Do anything necessary to resolve a symbol. Right now, we just
14671 assume that an otherwise unknown symbol is a variable. This sort
14672 of thing commonly happens for symbols in module. */
14675 resolve_symbol (gfc_symbol
*sym
)
14677 int check_constant
, mp_flag
;
14678 gfc_symtree
*symtree
;
14679 gfc_symtree
*this_symtree
;
14682 symbol_attribute class_attr
;
14683 gfc_array_spec
*as
;
14684 bool saved_specification_expr
;
14690 /* No symbol will ever have union type; only components can be unions.
14691 Union type declaration symbols have type BT_UNKNOWN but flavor FL_UNION
14692 (just like derived type declaration symbols have flavor FL_DERIVED). */
14693 gcc_assert (sym
->ts
.type
!= BT_UNION
);
14695 /* Coarrayed polymorphic objects with allocatable or pointer components are
14696 yet unsupported for -fcoarray=lib. */
14697 if (flag_coarray
== GFC_FCOARRAY_LIB
&& sym
->ts
.type
== BT_CLASS
14698 && sym
->ts
.u
.derived
&& CLASS_DATA (sym
)
14699 && CLASS_DATA (sym
)->attr
.codimension
14700 && (CLASS_DATA (sym
)->ts
.u
.derived
->attr
.alloc_comp
14701 || CLASS_DATA (sym
)->ts
.u
.derived
->attr
.pointer_comp
))
14703 gfc_error ("Sorry, allocatable/pointer components in polymorphic (CLASS) "
14704 "type coarrays at %L are unsupported", &sym
->declared_at
);
14708 if (sym
->attr
.artificial
)
14711 if (sym
->attr
.unlimited_polymorphic
)
14714 if (sym
->attr
.flavor
== FL_UNKNOWN
14715 || (sym
->attr
.flavor
== FL_PROCEDURE
&& !sym
->attr
.intrinsic
14716 && !sym
->attr
.generic
&& !sym
->attr
.external
14717 && sym
->attr
.if_source
== IFSRC_UNKNOWN
14718 && sym
->ts
.type
== BT_UNKNOWN
))
14721 /* If we find that a flavorless symbol is an interface in one of the
14722 parent namespaces, find its symtree in this namespace, free the
14723 symbol and set the symtree to point to the interface symbol. */
14724 for (ns
= gfc_current_ns
->parent
; ns
; ns
= ns
->parent
)
14726 symtree
= gfc_find_symtree (ns
->sym_root
, sym
->name
);
14727 if (symtree
&& (symtree
->n
.sym
->generic
||
14728 (symtree
->n
.sym
->attr
.flavor
== FL_PROCEDURE
14729 && sym
->ns
->construct_entities
)))
14731 this_symtree
= gfc_find_symtree (gfc_current_ns
->sym_root
,
14733 if (this_symtree
->n
.sym
== sym
)
14735 symtree
->n
.sym
->refs
++;
14736 gfc_release_symbol (sym
);
14737 this_symtree
->n
.sym
= symtree
->n
.sym
;
14743 /* Otherwise give it a flavor according to such attributes as
14745 if (sym
->attr
.flavor
== FL_UNKNOWN
&& sym
->attr
.external
== 0
14746 && sym
->attr
.intrinsic
== 0)
14747 sym
->attr
.flavor
= FL_VARIABLE
;
14748 else if (sym
->attr
.flavor
== FL_UNKNOWN
)
14750 sym
->attr
.flavor
= FL_PROCEDURE
;
14751 if (sym
->attr
.dimension
)
14752 sym
->attr
.function
= 1;
14756 if (sym
->attr
.external
&& sym
->ts
.type
!= BT_UNKNOWN
&& !sym
->attr
.function
)
14757 gfc_add_function (&sym
->attr
, sym
->name
, &sym
->declared_at
);
14759 if (sym
->attr
.procedure
&& sym
->attr
.if_source
!= IFSRC_DECL
14760 && !resolve_procedure_interface (sym
))
14763 if (sym
->attr
.is_protected
&& !sym
->attr
.proc_pointer
14764 && (sym
->attr
.procedure
|| sym
->attr
.external
))
14766 if (sym
->attr
.external
)
14767 gfc_error ("PROTECTED attribute conflicts with EXTERNAL attribute "
14768 "at %L", &sym
->declared_at
);
14770 gfc_error ("PROCEDURE attribute conflicts with PROTECTED attribute "
14771 "at %L", &sym
->declared_at
);
14776 if (sym
->attr
.flavor
== FL_DERIVED
&& !resolve_fl_derived (sym
))
14779 else if ((sym
->attr
.flavor
== FL_STRUCT
|| sym
->attr
.flavor
== FL_UNION
)
14780 && !resolve_fl_struct (sym
))
14783 /* Symbols that are module procedures with results (functions) have
14784 the types and array specification copied for type checking in
14785 procedures that call them, as well as for saving to a module
14786 file. These symbols can't stand the scrutiny that their results
14788 mp_flag
= (sym
->result
!= NULL
&& sym
->result
!= sym
);
14790 /* Make sure that the intrinsic is consistent with its internal
14791 representation. This needs to be done before assigning a default
14792 type to avoid spurious warnings. */
14793 if (sym
->attr
.flavor
!= FL_MODULE
&& sym
->attr
.intrinsic
14794 && !gfc_resolve_intrinsic (sym
, &sym
->declared_at
))
14797 /* Resolve associate names. */
14799 resolve_assoc_var (sym
, true);
14801 /* Assign default type to symbols that need one and don't have one. */
14802 if (sym
->ts
.type
== BT_UNKNOWN
)
14804 if (sym
->attr
.flavor
== FL_VARIABLE
|| sym
->attr
.flavor
== FL_PARAMETER
)
14806 gfc_set_default_type (sym
, 1, NULL
);
14809 if (sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.external
14810 && !sym
->attr
.function
&& !sym
->attr
.subroutine
14811 && gfc_get_default_type (sym
->name
, sym
->ns
)->type
== BT_UNKNOWN
)
14812 gfc_add_subroutine (&sym
->attr
, sym
->name
, &sym
->declared_at
);
14814 if (sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.function
)
14816 /* The specific case of an external procedure should emit an error
14817 in the case that there is no implicit type. */
14820 if (!sym
->attr
.mixed_entry_master
)
14821 gfc_set_default_type (sym
, sym
->attr
.external
, NULL
);
14825 /* Result may be in another namespace. */
14826 resolve_symbol (sym
->result
);
14828 if (!sym
->result
->attr
.proc_pointer
)
14830 sym
->ts
= sym
->result
->ts
;
14831 sym
->as
= gfc_copy_array_spec (sym
->result
->as
);
14832 sym
->attr
.dimension
= sym
->result
->attr
.dimension
;
14833 sym
->attr
.pointer
= sym
->result
->attr
.pointer
;
14834 sym
->attr
.allocatable
= sym
->result
->attr
.allocatable
;
14835 sym
->attr
.contiguous
= sym
->result
->attr
.contiguous
;
14840 else if (mp_flag
&& sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.function
)
14842 bool saved_specification_expr
= specification_expr
;
14843 specification_expr
= true;
14844 gfc_resolve_array_spec (sym
->result
->as
, false);
14845 specification_expr
= saved_specification_expr
;
14848 if (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
)
14850 as
= CLASS_DATA (sym
)->as
;
14851 class_attr
= CLASS_DATA (sym
)->attr
;
14852 class_attr
.pointer
= class_attr
.class_pointer
;
14856 class_attr
= sym
->attr
;
14861 if (sym
->attr
.contiguous
14862 && (!class_attr
.dimension
14863 || (as
->type
!= AS_ASSUMED_SHAPE
&& as
->type
!= AS_ASSUMED_RANK
14864 && !class_attr
.pointer
)))
14866 gfc_error ("%qs at %L has the CONTIGUOUS attribute but is not an "
14867 "array pointer or an assumed-shape or assumed-rank array",
14868 sym
->name
, &sym
->declared_at
);
14872 /* Assumed size arrays and assumed shape arrays must be dummy
14873 arguments. Array-spec's of implied-shape should have been resolved to
14874 AS_EXPLICIT already. */
14878 /* If AS_IMPLIED_SHAPE makes it to here, it must be a bad
14879 specification expression. */
14880 if (as
->type
== AS_IMPLIED_SHAPE
)
14883 for (i
=0; i
<as
->rank
; i
++)
14885 if (as
->lower
[i
] != NULL
&& as
->upper
[i
] == NULL
)
14887 gfc_error ("Bad specification for assumed size array at %L",
14888 &as
->lower
[i
]->where
);
14895 if (((as
->type
== AS_ASSUMED_SIZE
&& !as
->cp_was_assumed
)
14896 || as
->type
== AS_ASSUMED_SHAPE
)
14897 && !sym
->attr
.dummy
&& !sym
->attr
.select_type_temporary
)
14899 if (as
->type
== AS_ASSUMED_SIZE
)
14900 gfc_error ("Assumed size array at %L must be a dummy argument",
14901 &sym
->declared_at
);
14903 gfc_error ("Assumed shape array at %L must be a dummy argument",
14904 &sym
->declared_at
);
14907 /* TS 29113, C535a. */
14908 if (as
->type
== AS_ASSUMED_RANK
&& !sym
->attr
.dummy
14909 && !sym
->attr
.select_type_temporary
)
14911 gfc_error ("Assumed-rank array at %L must be a dummy argument",
14912 &sym
->declared_at
);
14915 if (as
->type
== AS_ASSUMED_RANK
14916 && (sym
->attr
.codimension
|| sym
->attr
.value
))
14918 gfc_error ("Assumed-rank array at %L may not have the VALUE or "
14919 "CODIMENSION attribute", &sym
->declared_at
);
14924 /* Make sure symbols with known intent or optional are really dummy
14925 variable. Because of ENTRY statement, this has to be deferred
14926 until resolution time. */
14928 if (!sym
->attr
.dummy
14929 && (sym
->attr
.optional
|| sym
->attr
.intent
!= INTENT_UNKNOWN
))
14931 gfc_error ("Symbol at %L is not a DUMMY variable", &sym
->declared_at
);
14935 if (sym
->attr
.value
&& !sym
->attr
.dummy
)
14937 gfc_error ("%qs at %L cannot have the VALUE attribute because "
14938 "it is not a dummy argument", sym
->name
, &sym
->declared_at
);
14942 if (sym
->attr
.value
&& sym
->ts
.type
== BT_CHARACTER
)
14944 gfc_charlen
*cl
= sym
->ts
.u
.cl
;
14945 if (!cl
|| !cl
->length
|| cl
->length
->expr_type
!= EXPR_CONSTANT
)
14947 gfc_error ("Character dummy variable %qs at %L with VALUE "
14948 "attribute must have constant length",
14949 sym
->name
, &sym
->declared_at
);
14953 if (sym
->ts
.is_c_interop
14954 && mpz_cmp_si (cl
->length
->value
.integer
, 1) != 0)
14956 gfc_error ("C interoperable character dummy variable %qs at %L "
14957 "with VALUE attribute must have length one",
14958 sym
->name
, &sym
->declared_at
);
14963 if (sym
->ts
.type
== BT_DERIVED
&& !sym
->attr
.is_iso_c
14964 && sym
->ts
.u
.derived
->attr
.generic
)
14966 sym
->ts
.u
.derived
= gfc_find_dt_in_generic (sym
->ts
.u
.derived
);
14967 if (!sym
->ts
.u
.derived
)
14969 gfc_error ("The derived type %qs at %L is of type %qs, "
14970 "which has not been defined", sym
->name
,
14971 &sym
->declared_at
, sym
->ts
.u
.derived
->name
);
14972 sym
->ts
.type
= BT_UNKNOWN
;
14977 /* Use the same constraints as TYPE(*), except for the type check
14978 and that only scalars and assumed-size arrays are permitted. */
14979 if (sym
->attr
.ext_attr
& (1 << EXT_ATTR_NO_ARG_CHECK
))
14981 if (!sym
->attr
.dummy
)
14983 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute shall be "
14984 "a dummy argument", sym
->name
, &sym
->declared_at
);
14988 if (sym
->ts
.type
!= BT_ASSUMED
&& sym
->ts
.type
!= BT_INTEGER
14989 && sym
->ts
.type
!= BT_REAL
&& sym
->ts
.type
!= BT_LOGICAL
14990 && sym
->ts
.type
!= BT_COMPLEX
)
14992 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute shall be "
14993 "of type TYPE(*) or of an numeric intrinsic type",
14994 sym
->name
, &sym
->declared_at
);
14998 if (sym
->attr
.allocatable
|| sym
->attr
.codimension
14999 || sym
->attr
.pointer
|| sym
->attr
.value
)
15001 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute may not "
15002 "have the ALLOCATABLE, CODIMENSION, POINTER or VALUE "
15003 "attribute", sym
->name
, &sym
->declared_at
);
15007 if (sym
->attr
.intent
== INTENT_OUT
)
15009 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute may not "
15010 "have the INTENT(OUT) attribute",
15011 sym
->name
, &sym
->declared_at
);
15014 if (sym
->attr
.dimension
&& sym
->as
->type
!= AS_ASSUMED_SIZE
)
15016 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute shall "
15017 "either be a scalar or an assumed-size array",
15018 sym
->name
, &sym
->declared_at
);
15022 /* Set the type to TYPE(*) and add a dimension(*) to ensure
15023 NO_ARG_CHECK is correctly handled in trans*.c, e.g. with
15025 sym
->ts
.type
= BT_ASSUMED
;
15026 sym
->as
= gfc_get_array_spec ();
15027 sym
->as
->type
= AS_ASSUMED_SIZE
;
15029 sym
->as
->lower
[0] = gfc_get_int_expr (gfc_default_integer_kind
, NULL
, 1);
15031 else if (sym
->ts
.type
== BT_ASSUMED
)
15033 /* TS 29113, C407a. */
15034 if (!sym
->attr
.dummy
)
15036 gfc_error ("Assumed type of variable %s at %L is only permitted "
15037 "for dummy variables", sym
->name
, &sym
->declared_at
);
15040 if (sym
->attr
.allocatable
|| sym
->attr
.codimension
15041 || sym
->attr
.pointer
|| sym
->attr
.value
)
15043 gfc_error ("Assumed-type variable %s at %L may not have the "
15044 "ALLOCATABLE, CODIMENSION, POINTER or VALUE attribute",
15045 sym
->name
, &sym
->declared_at
);
15048 if (sym
->attr
.intent
== INTENT_OUT
)
15050 gfc_error ("Assumed-type variable %s at %L may not have the "
15051 "INTENT(OUT) attribute",
15052 sym
->name
, &sym
->declared_at
);
15055 if (sym
->attr
.dimension
&& sym
->as
->type
== AS_EXPLICIT
)
15057 gfc_error ("Assumed-type variable %s at %L shall not be an "
15058 "explicit-shape array", sym
->name
, &sym
->declared_at
);
15063 /* If the symbol is marked as bind(c), that it is declared at module level
15064 scope and verify its type and kind. Do not do the latter for symbols
15065 that are implicitly typed because that is handled in
15066 gfc_set_default_type. Handle dummy arguments and procedure definitions
15067 separately. Also, anything that is use associated is not handled here
15068 but instead is handled in the module it is declared in. Finally, derived
15069 type definitions are allowed to be BIND(C) since that only implies that
15070 they're interoperable, and they are checked fully for interoperability
15071 when a variable is declared of that type. */
15072 if (sym
->attr
.is_bind_c
&& sym
->attr
.use_assoc
== 0
15073 && sym
->attr
.dummy
== 0 && sym
->attr
.flavor
!= FL_PROCEDURE
15074 && sym
->attr
.flavor
!= FL_DERIVED
)
15078 /* First, make sure the variable is declared at the
15079 module-level scope (J3/04-007, Section 15.3). */
15080 if (sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
&&
15081 sym
->attr
.in_common
== 0)
15083 gfc_error ("Variable %qs at %L cannot be BIND(C) because it "
15084 "is neither a COMMON block nor declared at the "
15085 "module level scope", sym
->name
, &(sym
->declared_at
));
15088 else if (sym
->ts
.type
== BT_CHARACTER
15089 && (sym
->ts
.u
.cl
== NULL
|| sym
->ts
.u
.cl
->length
== NULL
15090 || !gfc_is_constant_expr (sym
->ts
.u
.cl
->length
)
15091 || mpz_cmp_si (sym
->ts
.u
.cl
->length
->value
.integer
, 1) != 0))
15093 gfc_error ("BIND(C) Variable %qs at %L must have length one",
15094 sym
->name
, &sym
->declared_at
);
15097 else if (sym
->common_head
!= NULL
&& sym
->attr
.implicit_type
== 0)
15099 t
= verify_com_block_vars_c_interop (sym
->common_head
);
15101 else if (sym
->attr
.implicit_type
== 0)
15103 /* If type() declaration, we need to verify that the components
15104 of the given type are all C interoperable, etc. */
15105 if (sym
->ts
.type
== BT_DERIVED
&&
15106 sym
->ts
.u
.derived
->attr
.is_c_interop
!= 1)
15108 /* Make sure the user marked the derived type as BIND(C). If
15109 not, call the verify routine. This could print an error
15110 for the derived type more than once if multiple variables
15111 of that type are declared. */
15112 if (sym
->ts
.u
.derived
->attr
.is_bind_c
!= 1)
15113 verify_bind_c_derived_type (sym
->ts
.u
.derived
);
15117 /* Verify the variable itself as C interoperable if it
15118 is BIND(C). It is not possible for this to succeed if
15119 the verify_bind_c_derived_type failed, so don't have to handle
15120 any error returned by verify_bind_c_derived_type. */
15121 t
= verify_bind_c_sym (sym
, &(sym
->ts
), sym
->attr
.in_common
,
15122 sym
->common_block
);
15127 /* clear the is_bind_c flag to prevent reporting errors more than
15128 once if something failed. */
15129 sym
->attr
.is_bind_c
= 0;
15134 /* If a derived type symbol has reached this point, without its
15135 type being declared, we have an error. Notice that most
15136 conditions that produce undefined derived types have already
15137 been dealt with. However, the likes of:
15138 implicit type(t) (t) ..... call foo (t) will get us here if
15139 the type is not declared in the scope of the implicit
15140 statement. Change the type to BT_UNKNOWN, both because it is so
15141 and to prevent an ICE. */
15142 if (sym
->ts
.type
== BT_DERIVED
&& !sym
->attr
.is_iso_c
15143 && sym
->ts
.u
.derived
->components
== NULL
15144 && !sym
->ts
.u
.derived
->attr
.zero_comp
)
15146 gfc_error ("The derived type %qs at %L is of type %qs, "
15147 "which has not been defined", sym
->name
,
15148 &sym
->declared_at
, sym
->ts
.u
.derived
->name
);
15149 sym
->ts
.type
= BT_UNKNOWN
;
15153 /* Make sure that the derived type has been resolved and that the
15154 derived type is visible in the symbol's namespace, if it is a
15155 module function and is not PRIVATE. */
15156 if (sym
->ts
.type
== BT_DERIVED
15157 && sym
->ts
.u
.derived
->attr
.use_assoc
15158 && sym
->ns
->proc_name
15159 && sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
15160 && !resolve_fl_derived (sym
->ts
.u
.derived
))
15163 /* Unless the derived-type declaration is use associated, Fortran 95
15164 does not allow public entries of private derived types.
15165 See 4.4.1 (F95) and 4.5.1.1 (F2003); and related interpretation
15166 161 in 95-006r3. */
15167 if (sym
->ts
.type
== BT_DERIVED
15168 && sym
->ns
->proc_name
&& sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
15169 && !sym
->ts
.u
.derived
->attr
.use_assoc
15170 && gfc_check_symbol_access (sym
)
15171 && !gfc_check_symbol_access (sym
->ts
.u
.derived
)
15172 && !gfc_notify_std (GFC_STD_F2003
, "PUBLIC %s %qs at %L of PRIVATE "
15173 "derived type %qs",
15174 (sym
->attr
.flavor
== FL_PARAMETER
)
15175 ? "parameter" : "variable",
15176 sym
->name
, &sym
->declared_at
,
15177 sym
->ts
.u
.derived
->name
))
15180 /* F2008, C1302. */
15181 if (sym
->ts
.type
== BT_DERIVED
15182 && ((sym
->ts
.u
.derived
->from_intmod
== INTMOD_ISO_FORTRAN_ENV
15183 && sym
->ts
.u
.derived
->intmod_sym_id
== ISOFORTRAN_LOCK_TYPE
)
15184 || sym
->ts
.u
.derived
->attr
.lock_comp
)
15185 && !sym
->attr
.codimension
&& !sym
->ts
.u
.derived
->attr
.coarray_comp
)
15187 gfc_error ("Variable %s at %L of type LOCK_TYPE or with subcomponent of "
15188 "type LOCK_TYPE must be a coarray", sym
->name
,
15189 &sym
->declared_at
);
15193 /* TS18508, C702/C703. */
15194 if (sym
->ts
.type
== BT_DERIVED
15195 && ((sym
->ts
.u
.derived
->from_intmod
== INTMOD_ISO_FORTRAN_ENV
15196 && sym
->ts
.u
.derived
->intmod_sym_id
== ISOFORTRAN_EVENT_TYPE
)
15197 || sym
->ts
.u
.derived
->attr
.event_comp
)
15198 && !sym
->attr
.codimension
&& !sym
->ts
.u
.derived
->attr
.coarray_comp
)
15200 gfc_error ("Variable %s at %L of type EVENT_TYPE or with subcomponent of "
15201 "type EVENT_TYPE must be a coarray", sym
->name
,
15202 &sym
->declared_at
);
15206 /* An assumed-size array with INTENT(OUT) shall not be of a type for which
15207 default initialization is defined (5.1.2.4.4). */
15208 if (sym
->ts
.type
== BT_DERIVED
15210 && sym
->attr
.intent
== INTENT_OUT
15212 && sym
->as
->type
== AS_ASSUMED_SIZE
)
15214 for (c
= sym
->ts
.u
.derived
->components
; c
; c
= c
->next
)
15216 if (c
->initializer
)
15218 gfc_error ("The INTENT(OUT) dummy argument %qs at %L is "
15219 "ASSUMED SIZE and so cannot have a default initializer",
15220 sym
->name
, &sym
->declared_at
);
15227 if (sym
->ts
.type
== BT_DERIVED
&& sym
->attr
.dummy
15228 && sym
->attr
.intent
== INTENT_OUT
&& sym
->attr
.lock_comp
)
15230 gfc_error ("Dummy argument %qs at %L of LOCK_TYPE shall not be "
15231 "INTENT(OUT)", sym
->name
, &sym
->declared_at
);
15236 if (sym
->ts
.type
== BT_DERIVED
&& sym
->attr
.dummy
15237 && sym
->attr
.intent
== INTENT_OUT
&& sym
->attr
.event_comp
)
15239 gfc_error ("Dummy argument %qs at %L of EVENT_TYPE shall not be "
15240 "INTENT(OUT)", sym
->name
, &sym
->declared_at
);
15245 if ((((sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
->attr
.coarray_comp
)
15246 || (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
15247 && CLASS_DATA (sym
)->attr
.coarray_comp
))
15248 || class_attr
.codimension
)
15249 && (sym
->attr
.result
|| sym
->result
== sym
))
15251 gfc_error ("Function result %qs at %L shall not be a coarray or have "
15252 "a coarray component", sym
->name
, &sym
->declared_at
);
15257 if (sym
->attr
.codimension
&& sym
->ts
.type
== BT_DERIVED
15258 && sym
->ts
.u
.derived
->ts
.is_iso_c
)
15260 gfc_error ("Variable %qs at %L of TYPE(C_PTR) or TYPE(C_FUNPTR) "
15261 "shall not be a coarray", sym
->name
, &sym
->declared_at
);
15266 if (((sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
->attr
.coarray_comp
)
15267 || (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
15268 && CLASS_DATA (sym
)->attr
.coarray_comp
))
15269 && (class_attr
.codimension
|| class_attr
.pointer
|| class_attr
.dimension
15270 || class_attr
.allocatable
))
15272 gfc_error ("Variable %qs at %L with coarray component shall be a "
15273 "nonpointer, nonallocatable scalar, which is not a coarray",
15274 sym
->name
, &sym
->declared_at
);
15278 /* F2008, C526. The function-result case was handled above. */
15279 if (class_attr
.codimension
15280 && !(class_attr
.allocatable
|| sym
->attr
.dummy
|| sym
->attr
.save
15281 || sym
->attr
.select_type_temporary
15282 || sym
->attr
.associate_var
15283 || (sym
->ns
->save_all
&& !sym
->attr
.automatic
)
15284 || sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
15285 || sym
->ns
->proc_name
->attr
.is_main_program
15286 || sym
->attr
.function
|| sym
->attr
.result
|| sym
->attr
.use_assoc
))
15288 gfc_error ("Variable %qs at %L is a coarray and is not ALLOCATABLE, SAVE "
15289 "nor a dummy argument", sym
->name
, &sym
->declared_at
);
15293 else if (class_attr
.codimension
&& !sym
->attr
.select_type_temporary
15294 && !class_attr
.allocatable
&& as
&& as
->cotype
== AS_DEFERRED
)
15296 gfc_error ("Coarray variable %qs at %L shall not have codimensions with "
15297 "deferred shape", sym
->name
, &sym
->declared_at
);
15300 else if (class_attr
.codimension
&& class_attr
.allocatable
&& as
15301 && (as
->cotype
!= AS_DEFERRED
|| as
->type
!= AS_DEFERRED
))
15303 gfc_error ("Allocatable coarray variable %qs at %L must have "
15304 "deferred shape", sym
->name
, &sym
->declared_at
);
15309 if ((((sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
->attr
.coarray_comp
)
15310 || (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
15311 && CLASS_DATA (sym
)->attr
.coarray_comp
))
15312 || (class_attr
.codimension
&& class_attr
.allocatable
))
15313 && sym
->attr
.dummy
&& sym
->attr
.intent
== INTENT_OUT
)
15315 gfc_error ("Variable %qs at %L is INTENT(OUT) and can thus not be an "
15316 "allocatable coarray or have coarray components",
15317 sym
->name
, &sym
->declared_at
);
15321 if (class_attr
.codimension
&& sym
->attr
.dummy
15322 && sym
->ns
->proc_name
&& sym
->ns
->proc_name
->attr
.is_bind_c
)
15324 gfc_error ("Coarray dummy variable %qs at %L not allowed in BIND(C) "
15325 "procedure %qs", sym
->name
, &sym
->declared_at
,
15326 sym
->ns
->proc_name
->name
);
15330 if (sym
->ts
.type
== BT_LOGICAL
15331 && ((sym
->attr
.function
&& sym
->attr
.is_bind_c
&& sym
->result
== sym
)
15332 || ((sym
->attr
.dummy
|| sym
->attr
.result
) && sym
->ns
->proc_name
15333 && sym
->ns
->proc_name
->attr
.is_bind_c
)))
15336 for (i
= 0; gfc_logical_kinds
[i
].kind
; i
++)
15337 if (gfc_logical_kinds
[i
].kind
== sym
->ts
.kind
)
15339 if (!gfc_logical_kinds
[i
].c_bool
&& sym
->attr
.dummy
15340 && !gfc_notify_std (GFC_STD_GNU
, "LOGICAL dummy argument %qs at "
15341 "%L with non-C_Bool kind in BIND(C) procedure "
15342 "%qs", sym
->name
, &sym
->declared_at
,
15343 sym
->ns
->proc_name
->name
))
15345 else if (!gfc_logical_kinds
[i
].c_bool
15346 && !gfc_notify_std (GFC_STD_GNU
, "LOGICAL result variable "
15347 "%qs at %L with non-C_Bool kind in "
15348 "BIND(C) procedure %qs", sym
->name
,
15350 sym
->attr
.function
? sym
->name
15351 : sym
->ns
->proc_name
->name
))
15355 switch (sym
->attr
.flavor
)
15358 if (!resolve_fl_variable (sym
, mp_flag
))
15363 if (sym
->formal
&& !sym
->formal_ns
)
15365 /* Check that none of the arguments are a namelist. */
15366 gfc_formal_arglist
*formal
= sym
->formal
;
15368 for (; formal
; formal
= formal
->next
)
15369 if (formal
->sym
&& formal
->sym
->attr
.flavor
== FL_NAMELIST
)
15371 gfc_error ("Namelist %qs cannot be an argument to "
15372 "subroutine or function at %L",
15373 formal
->sym
->name
, &sym
->declared_at
);
15378 if (!resolve_fl_procedure (sym
, mp_flag
))
15383 if (!resolve_fl_namelist (sym
))
15388 if (!resolve_fl_parameter (sym
))
15396 /* Resolve array specifier. Check as well some constraints
15397 on COMMON blocks. */
15399 check_constant
= sym
->attr
.in_common
&& !sym
->attr
.pointer
;
15401 /* Set the formal_arg_flag so that check_conflict will not throw
15402 an error for host associated variables in the specification
15403 expression for an array_valued function. */
15404 if ((sym
->attr
.function
|| sym
->attr
.result
) && sym
->as
)
15405 formal_arg_flag
= true;
15407 saved_specification_expr
= specification_expr
;
15408 specification_expr
= true;
15409 gfc_resolve_array_spec (sym
->as
, check_constant
);
15410 specification_expr
= saved_specification_expr
;
15412 formal_arg_flag
= false;
15414 /* Resolve formal namespaces. */
15415 if (sym
->formal_ns
&& sym
->formal_ns
!= gfc_current_ns
15416 && !sym
->attr
.contained
&& !sym
->attr
.intrinsic
)
15417 gfc_resolve (sym
->formal_ns
);
15419 /* Make sure the formal namespace is present. */
15420 if (sym
->formal
&& !sym
->formal_ns
)
15422 gfc_formal_arglist
*formal
= sym
->formal
;
15423 while (formal
&& !formal
->sym
)
15424 formal
= formal
->next
;
15428 sym
->formal_ns
= formal
->sym
->ns
;
15429 if (sym
->ns
!= formal
->sym
->ns
)
15430 sym
->formal_ns
->refs
++;
15434 /* Check threadprivate restrictions. */
15435 if (sym
->attr
.threadprivate
&& !sym
->attr
.save
15436 && !(sym
->ns
->save_all
&& !sym
->attr
.automatic
)
15437 && (!sym
->attr
.in_common
15438 && sym
->module
== NULL
15439 && (sym
->ns
->proc_name
== NULL
15440 || sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
)))
15441 gfc_error ("Threadprivate at %L isn't SAVEd", &sym
->declared_at
);
15443 /* Check omp declare target restrictions. */
15444 if (sym
->attr
.omp_declare_target
15445 && sym
->attr
.flavor
== FL_VARIABLE
15447 && !(sym
->ns
->save_all
&& !sym
->attr
.automatic
)
15448 && (!sym
->attr
.in_common
15449 && sym
->module
== NULL
15450 && (sym
->ns
->proc_name
== NULL
15451 || sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
)))
15452 gfc_error ("!$OMP DECLARE TARGET variable %qs at %L isn't SAVEd",
15453 sym
->name
, &sym
->declared_at
);
15455 /* If we have come this far we can apply default-initializers, as
15456 described in 14.7.5, to those variables that have not already
15457 been assigned one. */
15458 if (sym
->ts
.type
== BT_DERIVED
15460 && !sym
->attr
.allocatable
15461 && !sym
->attr
.alloc_comp
)
15463 symbol_attribute
*a
= &sym
->attr
;
15465 if ((!a
->save
&& !a
->dummy
&& !a
->pointer
15466 && !a
->in_common
&& !a
->use_assoc
15468 && !((a
->function
|| a
->result
)
15470 || sym
->ts
.u
.derived
->attr
.alloc_comp
15471 || sym
->ts
.u
.derived
->attr
.pointer_comp
))
15472 && !(a
->function
&& sym
!= sym
->result
))
15473 || (a
->dummy
&& a
->intent
== INTENT_OUT
&& !a
->pointer
))
15474 apply_default_init (sym
);
15475 else if (a
->function
&& sym
->result
&& a
->access
!= ACCESS_PRIVATE
15476 && (sym
->ts
.u
.derived
->attr
.alloc_comp
15477 || sym
->ts
.u
.derived
->attr
.pointer_comp
))
15478 /* Mark the result symbol to be referenced, when it has allocatable
15480 sym
->result
->attr
.referenced
= 1;
15483 if (sym
->ts
.type
== BT_CLASS
&& sym
->ns
== gfc_current_ns
15484 && sym
->attr
.dummy
&& sym
->attr
.intent
== INTENT_OUT
15485 && !CLASS_DATA (sym
)->attr
.class_pointer
15486 && !CLASS_DATA (sym
)->attr
.allocatable
)
15487 apply_default_init (sym
);
15489 /* If this symbol has a type-spec, check it. */
15490 if (sym
->attr
.flavor
== FL_VARIABLE
|| sym
->attr
.flavor
== FL_PARAMETER
15491 || (sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.function
))
15492 if (!resolve_typespec_used (&sym
->ts
, &sym
->declared_at
, sym
->name
))
15495 if (sym
->param_list
)
15500 /************* Resolve DATA statements *************/
15504 gfc_data_value
*vnode
;
15510 /* Advance the values structure to point to the next value in the data list. */
15513 next_data_value (void)
15515 while (mpz_cmp_ui (values
.left
, 0) == 0)
15518 if (values
.vnode
->next
== NULL
)
15521 values
.vnode
= values
.vnode
->next
;
15522 mpz_set (values
.left
, values
.vnode
->repeat
);
15530 check_data_variable (gfc_data_variable
*var
, locus
*where
)
15536 ar_type mark
= AR_UNKNOWN
;
15538 mpz_t section_index
[GFC_MAX_DIMENSIONS
];
15544 if (!gfc_resolve_expr (var
->expr
))
15548 mpz_init_set_si (offset
, 0);
15551 if (e
->expr_type
== EXPR_FUNCTION
&& e
->value
.function
.isym
15552 && e
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
)
15553 e
= e
->value
.function
.actual
->expr
;
15555 if (e
->expr_type
!= EXPR_VARIABLE
)
15557 gfc_error ("Expecting definable entity near %L", where
);
15561 sym
= e
->symtree
->n
.sym
;
15563 if (sym
->ns
->is_block_data
&& !sym
->attr
.in_common
)
15565 gfc_error ("BLOCK DATA element %qs at %L must be in COMMON",
15566 sym
->name
, &sym
->declared_at
);
15570 if (e
->ref
== NULL
&& sym
->as
)
15572 gfc_error ("DATA array %qs at %L must be specified in a previous"
15573 " declaration", sym
->name
, where
);
15577 has_pointer
= sym
->attr
.pointer
;
15579 if (gfc_is_coindexed (e
))
15581 gfc_error ("DATA element %qs at %L cannot have a coindex", sym
->name
,
15586 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
15588 if (ref
->type
== REF_COMPONENT
&& ref
->u
.c
.component
->attr
.pointer
)
15592 && ref
->type
== REF_ARRAY
15593 && ref
->u
.ar
.type
!= AR_FULL
)
15595 gfc_error ("DATA element %qs at %L is a pointer and so must "
15596 "be a full array", sym
->name
, where
);
15601 if (e
->rank
== 0 || has_pointer
)
15603 mpz_init_set_ui (size
, 1);
15610 /* Find the array section reference. */
15611 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
15613 if (ref
->type
!= REF_ARRAY
)
15615 if (ref
->u
.ar
.type
== AR_ELEMENT
)
15621 /* Set marks according to the reference pattern. */
15622 switch (ref
->u
.ar
.type
)
15630 /* Get the start position of array section. */
15631 gfc_get_section_index (ar
, section_index
, &offset
);
15636 gcc_unreachable ();
15639 if (!gfc_array_size (e
, &size
))
15641 gfc_error ("Nonconstant array section at %L in DATA statement",
15643 mpz_clear (offset
);
15650 while (mpz_cmp_ui (size
, 0) > 0)
15652 if (!next_data_value ())
15654 gfc_error ("DATA statement at %L has more variables than values",
15660 t
= gfc_check_assign (var
->expr
, values
.vnode
->expr
, 0);
15664 /* If we have more than one element left in the repeat count,
15665 and we have more than one element left in the target variable,
15666 then create a range assignment. */
15667 /* FIXME: Only done for full arrays for now, since array sections
15669 if (mark
== AR_FULL
&& ref
&& ref
->next
== NULL
15670 && mpz_cmp_ui (values
.left
, 1) > 0 && mpz_cmp_ui (size
, 1) > 0)
15674 if (mpz_cmp (size
, values
.left
) >= 0)
15676 mpz_init_set (range
, values
.left
);
15677 mpz_sub (size
, size
, values
.left
);
15678 mpz_set_ui (values
.left
, 0);
15682 mpz_init_set (range
, size
);
15683 mpz_sub (values
.left
, values
.left
, size
);
15684 mpz_set_ui (size
, 0);
15687 t
= gfc_assign_data_value (var
->expr
, values
.vnode
->expr
,
15690 mpz_add (offset
, offset
, range
);
15697 /* Assign initial value to symbol. */
15700 mpz_sub_ui (values
.left
, values
.left
, 1);
15701 mpz_sub_ui (size
, size
, 1);
15703 t
= gfc_assign_data_value (var
->expr
, values
.vnode
->expr
,
15708 if (mark
== AR_FULL
)
15709 mpz_add_ui (offset
, offset
, 1);
15711 /* Modify the array section indexes and recalculate the offset
15712 for next element. */
15713 else if (mark
== AR_SECTION
)
15714 gfc_advance_section (section_index
, ar
, &offset
);
15718 if (mark
== AR_SECTION
)
15720 for (i
= 0; i
< ar
->dimen
; i
++)
15721 mpz_clear (section_index
[i
]);
15725 mpz_clear (offset
);
15731 static bool traverse_data_var (gfc_data_variable
*, locus
*);
15733 /* Iterate over a list of elements in a DATA statement. */
15736 traverse_data_list (gfc_data_variable
*var
, locus
*where
)
15739 iterator_stack frame
;
15740 gfc_expr
*e
, *start
, *end
, *step
;
15741 bool retval
= true;
15743 mpz_init (frame
.value
);
15746 start
= gfc_copy_expr (var
->iter
.start
);
15747 end
= gfc_copy_expr (var
->iter
.end
);
15748 step
= gfc_copy_expr (var
->iter
.step
);
15750 if (!gfc_simplify_expr (start
, 1)
15751 || start
->expr_type
!= EXPR_CONSTANT
)
15753 gfc_error ("start of implied-do loop at %L could not be "
15754 "simplified to a constant value", &start
->where
);
15758 if (!gfc_simplify_expr (end
, 1)
15759 || end
->expr_type
!= EXPR_CONSTANT
)
15761 gfc_error ("end of implied-do loop at %L could not be "
15762 "simplified to a constant value", &start
->where
);
15766 if (!gfc_simplify_expr (step
, 1)
15767 || step
->expr_type
!= EXPR_CONSTANT
)
15769 gfc_error ("step of implied-do loop at %L could not be "
15770 "simplified to a constant value", &start
->where
);
15775 mpz_set (trip
, end
->value
.integer
);
15776 mpz_sub (trip
, trip
, start
->value
.integer
);
15777 mpz_add (trip
, trip
, step
->value
.integer
);
15779 mpz_div (trip
, trip
, step
->value
.integer
);
15781 mpz_set (frame
.value
, start
->value
.integer
);
15783 frame
.prev
= iter_stack
;
15784 frame
.variable
= var
->iter
.var
->symtree
;
15785 iter_stack
= &frame
;
15787 while (mpz_cmp_ui (trip
, 0) > 0)
15789 if (!traverse_data_var (var
->list
, where
))
15795 e
= gfc_copy_expr (var
->expr
);
15796 if (!gfc_simplify_expr (e
, 1))
15803 mpz_add (frame
.value
, frame
.value
, step
->value
.integer
);
15805 mpz_sub_ui (trip
, trip
, 1);
15809 mpz_clear (frame
.value
);
15812 gfc_free_expr (start
);
15813 gfc_free_expr (end
);
15814 gfc_free_expr (step
);
15816 iter_stack
= frame
.prev
;
15821 /* Type resolve variables in the variable list of a DATA statement. */
15824 traverse_data_var (gfc_data_variable
*var
, locus
*where
)
15828 for (; var
; var
= var
->next
)
15830 if (var
->expr
== NULL
)
15831 t
= traverse_data_list (var
, where
);
15833 t
= check_data_variable (var
, where
);
15843 /* Resolve the expressions and iterators associated with a data statement.
15844 This is separate from the assignment checking because data lists should
15845 only be resolved once. */
15848 resolve_data_variables (gfc_data_variable
*d
)
15850 for (; d
; d
= d
->next
)
15852 if (d
->list
== NULL
)
15854 if (!gfc_resolve_expr (d
->expr
))
15859 if (!gfc_resolve_iterator (&d
->iter
, false, true))
15862 if (!resolve_data_variables (d
->list
))
15871 /* Resolve a single DATA statement. We implement this by storing a pointer to
15872 the value list into static variables, and then recursively traversing the
15873 variables list, expanding iterators and such. */
15876 resolve_data (gfc_data
*d
)
15879 if (!resolve_data_variables (d
->var
))
15882 values
.vnode
= d
->value
;
15883 if (d
->value
== NULL
)
15884 mpz_set_ui (values
.left
, 0);
15886 mpz_set (values
.left
, d
->value
->repeat
);
15888 if (!traverse_data_var (d
->var
, &d
->where
))
15891 /* At this point, we better not have any values left. */
15893 if (next_data_value ())
15894 gfc_error ("DATA statement at %L has more values than variables",
15899 /* 12.6 Constraint: In a pure subprogram any variable which is in common or
15900 accessed by host or use association, is a dummy argument to a pure function,
15901 is a dummy argument with INTENT (IN) to a pure subroutine, or an object that
15902 is storage associated with any such variable, shall not be used in the
15903 following contexts: (clients of this function). */
15905 /* Determines if a variable is not 'pure', i.e., not assignable within a pure
15906 procedure. Returns zero if assignment is OK, nonzero if there is a
15909 gfc_impure_variable (gfc_symbol
*sym
)
15914 if (sym
->attr
.use_assoc
|| sym
->attr
.in_common
)
15917 /* Check if the symbol's ns is inside the pure procedure. */
15918 for (ns
= gfc_current_ns
; ns
; ns
= ns
->parent
)
15922 if (ns
->proc_name
->attr
.flavor
== FL_PROCEDURE
&& !sym
->attr
.function
)
15926 proc
= sym
->ns
->proc_name
;
15927 if (sym
->attr
.dummy
15928 && ((proc
->attr
.subroutine
&& sym
->attr
.intent
== INTENT_IN
)
15929 || proc
->attr
.function
))
15932 /* TODO: Sort out what can be storage associated, if anything, and include
15933 it here. In principle equivalences should be scanned but it does not
15934 seem to be possible to storage associate an impure variable this way. */
15939 /* Test whether a symbol is pure or not. For a NULL pointer, checks if the
15940 current namespace is inside a pure procedure. */
15943 gfc_pure (gfc_symbol
*sym
)
15945 symbol_attribute attr
;
15950 /* Check if the current namespace or one of its parents
15951 belongs to a pure procedure. */
15952 for (ns
= gfc_current_ns
; ns
; ns
= ns
->parent
)
15954 sym
= ns
->proc_name
;
15958 if (attr
.flavor
== FL_PROCEDURE
&& attr
.pure
)
15966 return attr
.flavor
== FL_PROCEDURE
&& attr
.pure
;
15970 /* Test whether a symbol is implicitly pure or not. For a NULL pointer,
15971 checks if the current namespace is implicitly pure. Note that this
15972 function returns false for a PURE procedure. */
15975 gfc_implicit_pure (gfc_symbol
*sym
)
15981 /* Check if the current procedure is implicit_pure. Walk up
15982 the procedure list until we find a procedure. */
15983 for (ns
= gfc_current_ns
; ns
; ns
= ns
->parent
)
15985 sym
= ns
->proc_name
;
15989 if (sym
->attr
.flavor
== FL_PROCEDURE
)
15994 return sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.implicit_pure
15995 && !sym
->attr
.pure
;
16000 gfc_unset_implicit_pure (gfc_symbol
*sym
)
16006 /* Check if the current procedure is implicit_pure. Walk up
16007 the procedure list until we find a procedure. */
16008 for (ns
= gfc_current_ns
; ns
; ns
= ns
->parent
)
16010 sym
= ns
->proc_name
;
16014 if (sym
->attr
.flavor
== FL_PROCEDURE
)
16019 if (sym
->attr
.flavor
== FL_PROCEDURE
)
16020 sym
->attr
.implicit_pure
= 0;
16022 sym
->attr
.pure
= 0;
16026 /* Test whether the current procedure is elemental or not. */
16029 gfc_elemental (gfc_symbol
*sym
)
16031 symbol_attribute attr
;
16034 sym
= gfc_current_ns
->proc_name
;
16039 return attr
.flavor
== FL_PROCEDURE
&& attr
.elemental
;
16043 /* Warn about unused labels. */
16046 warn_unused_fortran_label (gfc_st_label
*label
)
16051 warn_unused_fortran_label (label
->left
);
16053 if (label
->defined
== ST_LABEL_UNKNOWN
)
16056 switch (label
->referenced
)
16058 case ST_LABEL_UNKNOWN
:
16059 gfc_warning (OPT_Wunused_label
, "Label %d at %L defined but not used",
16060 label
->value
, &label
->where
);
16063 case ST_LABEL_BAD_TARGET
:
16064 gfc_warning (OPT_Wunused_label
,
16065 "Label %d at %L defined but cannot be used",
16066 label
->value
, &label
->where
);
16073 warn_unused_fortran_label (label
->right
);
16077 /* Returns the sequence type of a symbol or sequence. */
16080 sequence_type (gfc_typespec ts
)
16089 if (ts
.u
.derived
->components
== NULL
)
16090 return SEQ_NONDEFAULT
;
16092 result
= sequence_type (ts
.u
.derived
->components
->ts
);
16093 for (c
= ts
.u
.derived
->components
->next
; c
; c
= c
->next
)
16094 if (sequence_type (c
->ts
) != result
)
16100 if (ts
.kind
!= gfc_default_character_kind
)
16101 return SEQ_NONDEFAULT
;
16103 return SEQ_CHARACTER
;
16106 if (ts
.kind
!= gfc_default_integer_kind
)
16107 return SEQ_NONDEFAULT
;
16109 return SEQ_NUMERIC
;
16112 if (!(ts
.kind
== gfc_default_real_kind
16113 || ts
.kind
== gfc_default_double_kind
))
16114 return SEQ_NONDEFAULT
;
16116 return SEQ_NUMERIC
;
16119 if (ts
.kind
!= gfc_default_complex_kind
)
16120 return SEQ_NONDEFAULT
;
16122 return SEQ_NUMERIC
;
16125 if (ts
.kind
!= gfc_default_logical_kind
)
16126 return SEQ_NONDEFAULT
;
16128 return SEQ_NUMERIC
;
16131 return SEQ_NONDEFAULT
;
16136 /* Resolve derived type EQUIVALENCE object. */
16139 resolve_equivalence_derived (gfc_symbol
*derived
, gfc_symbol
*sym
, gfc_expr
*e
)
16141 gfc_component
*c
= derived
->components
;
16146 /* Shall not be an object of nonsequence derived type. */
16147 if (!derived
->attr
.sequence
)
16149 gfc_error ("Derived type variable %qs at %L must have SEQUENCE "
16150 "attribute to be an EQUIVALENCE object", sym
->name
,
16155 /* Shall not have allocatable components. */
16156 if (derived
->attr
.alloc_comp
)
16158 gfc_error ("Derived type variable %qs at %L cannot have ALLOCATABLE "
16159 "components to be an EQUIVALENCE object",sym
->name
,
16164 if (sym
->attr
.in_common
&& gfc_has_default_initializer (sym
->ts
.u
.derived
))
16166 gfc_error ("Derived type variable %qs at %L with default "
16167 "initialization cannot be in EQUIVALENCE with a variable "
16168 "in COMMON", sym
->name
, &e
->where
);
16172 for (; c
; c
= c
->next
)
16174 if (gfc_bt_struct (c
->ts
.type
)
16175 && (!resolve_equivalence_derived(c
->ts
.u
.derived
, sym
, e
)))
16178 /* Shall not be an object of sequence derived type containing a pointer
16179 in the structure. */
16180 if (c
->attr
.pointer
)
16182 gfc_error ("Derived type variable %qs at %L with pointer "
16183 "component(s) cannot be an EQUIVALENCE object",
16184 sym
->name
, &e
->where
);
16192 /* Resolve equivalence object.
16193 An EQUIVALENCE object shall not be a dummy argument, a pointer, a target,
16194 an allocatable array, an object of nonsequence derived type, an object of
16195 sequence derived type containing a pointer at any level of component
16196 selection, an automatic object, a function name, an entry name, a result
16197 name, a named constant, a structure component, or a subobject of any of
16198 the preceding objects. A substring shall not have length zero. A
16199 derived type shall not have components with default initialization nor
16200 shall two objects of an equivalence group be initialized.
16201 Either all or none of the objects shall have an protected attribute.
16202 The simple constraints are done in symbol.c(check_conflict) and the rest
16203 are implemented here. */
16206 resolve_equivalence (gfc_equiv
*eq
)
16209 gfc_symbol
*first_sym
;
16212 locus
*last_where
= NULL
;
16213 seq_type eq_type
, last_eq_type
;
16214 gfc_typespec
*last_ts
;
16215 int object
, cnt_protected
;
16218 last_ts
= &eq
->expr
->symtree
->n
.sym
->ts
;
16220 first_sym
= eq
->expr
->symtree
->n
.sym
;
16224 for (object
= 1; eq
; eq
= eq
->eq
, object
++)
16228 e
->ts
= e
->symtree
->n
.sym
->ts
;
16229 /* match_varspec might not know yet if it is seeing
16230 array reference or substring reference, as it doesn't
16232 if (e
->ref
&& e
->ref
->type
== REF_ARRAY
)
16234 gfc_ref
*ref
= e
->ref
;
16235 sym
= e
->symtree
->n
.sym
;
16237 if (sym
->attr
.dimension
)
16239 ref
->u
.ar
.as
= sym
->as
;
16243 /* For substrings, convert REF_ARRAY into REF_SUBSTRING. */
16244 if (e
->ts
.type
== BT_CHARACTER
16246 && ref
->type
== REF_ARRAY
16247 && ref
->u
.ar
.dimen
== 1
16248 && ref
->u
.ar
.dimen_type
[0] == DIMEN_RANGE
16249 && ref
->u
.ar
.stride
[0] == NULL
)
16251 gfc_expr
*start
= ref
->u
.ar
.start
[0];
16252 gfc_expr
*end
= ref
->u
.ar
.end
[0];
16255 /* Optimize away the (:) reference. */
16256 if (start
== NULL
&& end
== NULL
)
16259 e
->ref
= ref
->next
;
16261 e
->ref
->next
= ref
->next
;
16266 ref
->type
= REF_SUBSTRING
;
16268 start
= gfc_get_int_expr (gfc_charlen_int_kind
,
16270 ref
->u
.ss
.start
= start
;
16271 if (end
== NULL
&& e
->ts
.u
.cl
)
16272 end
= gfc_copy_expr (e
->ts
.u
.cl
->length
);
16273 ref
->u
.ss
.end
= end
;
16274 ref
->u
.ss
.length
= e
->ts
.u
.cl
;
16281 /* Any further ref is an error. */
16284 gcc_assert (ref
->type
== REF_ARRAY
);
16285 gfc_error ("Syntax error in EQUIVALENCE statement at %L",
16291 if (!gfc_resolve_expr (e
))
16294 sym
= e
->symtree
->n
.sym
;
16296 if (sym
->attr
.is_protected
)
16298 if (cnt_protected
> 0 && cnt_protected
!= object
)
16300 gfc_error ("Either all or none of the objects in the "
16301 "EQUIVALENCE set at %L shall have the "
16302 "PROTECTED attribute",
16307 /* Shall not equivalence common block variables in a PURE procedure. */
16308 if (sym
->ns
->proc_name
16309 && sym
->ns
->proc_name
->attr
.pure
16310 && sym
->attr
.in_common
)
16312 /* Need to check for symbols that may have entered the pure
16313 procedure via a USE statement. */
16314 bool saw_sym
= false;
16315 if (sym
->ns
->use_stmts
)
16318 for (r
= sym
->ns
->use_stmts
->rename
; r
; r
= r
->next
)
16319 if (strcmp(r
->use_name
, sym
->name
) == 0) saw_sym
= true;
16325 gfc_error ("COMMON block member %qs at %L cannot be an "
16326 "EQUIVALENCE object in the pure procedure %qs",
16327 sym
->name
, &e
->where
, sym
->ns
->proc_name
->name
);
16331 /* Shall not be a named constant. */
16332 if (e
->expr_type
== EXPR_CONSTANT
)
16334 gfc_error ("Named constant %qs at %L cannot be an EQUIVALENCE "
16335 "object", sym
->name
, &e
->where
);
16339 if (e
->ts
.type
== BT_DERIVED
16340 && !resolve_equivalence_derived (e
->ts
.u
.derived
, sym
, e
))
16343 /* Check that the types correspond correctly:
16345 A numeric sequence structure may be equivalenced to another sequence
16346 structure, an object of default integer type, default real type, double
16347 precision real type, default logical type such that components of the
16348 structure ultimately only become associated to objects of the same
16349 kind. A character sequence structure may be equivalenced to an object
16350 of default character kind or another character sequence structure.
16351 Other objects may be equivalenced only to objects of the same type and
16352 kind parameters. */
16354 /* Identical types are unconditionally OK. */
16355 if (object
== 1 || gfc_compare_types (last_ts
, &sym
->ts
))
16356 goto identical_types
;
16358 last_eq_type
= sequence_type (*last_ts
);
16359 eq_type
= sequence_type (sym
->ts
);
16361 /* Since the pair of objects is not of the same type, mixed or
16362 non-default sequences can be rejected. */
16364 msg
= "Sequence %s with mixed components in EQUIVALENCE "
16365 "statement at %L with different type objects";
16367 && last_eq_type
== SEQ_MIXED
16368 && !gfc_notify_std (GFC_STD_GNU
, msg
, first_sym
->name
, last_where
))
16369 || (eq_type
== SEQ_MIXED
16370 && !gfc_notify_std (GFC_STD_GNU
, msg
, sym
->name
, &e
->where
)))
16373 msg
= "Non-default type object or sequence %s in EQUIVALENCE "
16374 "statement at %L with objects of different type";
16376 && last_eq_type
== SEQ_NONDEFAULT
16377 && !gfc_notify_std (GFC_STD_GNU
, msg
, first_sym
->name
, last_where
))
16378 || (eq_type
== SEQ_NONDEFAULT
16379 && !gfc_notify_std (GFC_STD_GNU
, msg
, sym
->name
, &e
->where
)))
16382 msg
="Non-CHARACTER object %qs in default CHARACTER "
16383 "EQUIVALENCE statement at %L";
16384 if (last_eq_type
== SEQ_CHARACTER
16385 && eq_type
!= SEQ_CHARACTER
16386 && !gfc_notify_std (GFC_STD_GNU
, msg
, sym
->name
, &e
->where
))
16389 msg
="Non-NUMERIC object %qs in default NUMERIC "
16390 "EQUIVALENCE statement at %L";
16391 if (last_eq_type
== SEQ_NUMERIC
16392 && eq_type
!= SEQ_NUMERIC
16393 && !gfc_notify_std (GFC_STD_GNU
, msg
, sym
->name
, &e
->where
))
16398 last_where
= &e
->where
;
16403 /* Shall not be an automatic array. */
16404 if (e
->ref
->type
== REF_ARRAY
16405 && !gfc_resolve_array_spec (e
->ref
->u
.ar
.as
, 1))
16407 gfc_error ("Array %qs at %L with non-constant bounds cannot be "
16408 "an EQUIVALENCE object", sym
->name
, &e
->where
);
16415 /* Shall not be a structure component. */
16416 if (r
->type
== REF_COMPONENT
)
16418 gfc_error ("Structure component %qs at %L cannot be an "
16419 "EQUIVALENCE object",
16420 r
->u
.c
.component
->name
, &e
->where
);
16424 /* A substring shall not have length zero. */
16425 if (r
->type
== REF_SUBSTRING
)
16427 if (compare_bound (r
->u
.ss
.start
, r
->u
.ss
.end
) == CMP_GT
)
16429 gfc_error ("Substring at %L has length zero",
16430 &r
->u
.ss
.start
->where
);
16440 /* Function called by resolve_fntype to flag other symbol used in the
16441 length type parameter specification of function resuls. */
16444 flag_fn_result_spec (gfc_expr
*expr
,
16446 int *f ATTRIBUTE_UNUSED
)
16451 if (expr
->expr_type
== EXPR_VARIABLE
)
16453 s
= expr
->symtree
->n
.sym
;
16454 for (ns
= s
->ns
; ns
; ns
= ns
->parent
)
16460 gfc_error ("Self reference in character length expression "
16461 "for %qs at %L", sym
->name
, &expr
->where
);
16465 if (!s
->fn_result_spec
16466 && s
->attr
.flavor
== FL_PARAMETER
)
16468 /* Function contained in a module.... */
16469 if (ns
->proc_name
&& ns
->proc_name
->attr
.flavor
== FL_MODULE
)
16472 s
->fn_result_spec
= 1;
16473 /* Make sure that this symbol is translated as a module
16475 st
= gfc_get_unique_symtree (ns
);
16479 /* ... which is use associated and called. */
16480 else if (s
->attr
.use_assoc
|| s
->attr
.used_in_submodule
16482 /* External function matched with an interface. */
16485 && s
->ns
->proc_name
->attr
.if_source
== IFSRC_DECL
)
16486 || s
->ns
->proc_name
->attr
.if_source
== IFSRC_IFBODY
)
16487 && s
->ns
->proc_name
->attr
.function
))
16488 s
->fn_result_spec
= 1;
16495 /* Resolve function and ENTRY types, issue diagnostics if needed. */
16498 resolve_fntype (gfc_namespace
*ns
)
16500 gfc_entry_list
*el
;
16503 if (ns
->proc_name
== NULL
|| !ns
->proc_name
->attr
.function
)
16506 /* If there are any entries, ns->proc_name is the entry master
16507 synthetic symbol and ns->entries->sym actual FUNCTION symbol. */
16509 sym
= ns
->entries
->sym
;
16511 sym
= ns
->proc_name
;
16512 if (sym
->result
== sym
16513 && sym
->ts
.type
== BT_UNKNOWN
16514 && !gfc_set_default_type (sym
, 0, NULL
)
16515 && !sym
->attr
.untyped
)
16517 gfc_error ("Function %qs at %L has no IMPLICIT type",
16518 sym
->name
, &sym
->declared_at
);
16519 sym
->attr
.untyped
= 1;
16522 if (sym
->ts
.type
== BT_DERIVED
&& !sym
->ts
.u
.derived
->attr
.use_assoc
16523 && !sym
->attr
.contained
16524 && !gfc_check_symbol_access (sym
->ts
.u
.derived
)
16525 && gfc_check_symbol_access (sym
))
16527 gfc_notify_std (GFC_STD_F2003
, "PUBLIC function %qs at "
16528 "%L of PRIVATE type %qs", sym
->name
,
16529 &sym
->declared_at
, sym
->ts
.u
.derived
->name
);
16533 for (el
= ns
->entries
->next
; el
; el
= el
->next
)
16535 if (el
->sym
->result
== el
->sym
16536 && el
->sym
->ts
.type
== BT_UNKNOWN
16537 && !gfc_set_default_type (el
->sym
, 0, NULL
)
16538 && !el
->sym
->attr
.untyped
)
16540 gfc_error ("ENTRY %qs at %L has no IMPLICIT type",
16541 el
->sym
->name
, &el
->sym
->declared_at
);
16542 el
->sym
->attr
.untyped
= 1;
16546 if (sym
->ts
.type
== BT_CHARACTER
)
16547 gfc_traverse_expr (sym
->ts
.u
.cl
->length
, sym
, flag_fn_result_spec
, 0);
16551 /* 12.3.2.1.1 Defined operators. */
16554 check_uop_procedure (gfc_symbol
*sym
, locus where
)
16556 gfc_formal_arglist
*formal
;
16558 if (!sym
->attr
.function
)
16560 gfc_error ("User operator procedure %qs at %L must be a FUNCTION",
16561 sym
->name
, &where
);
16565 if (sym
->ts
.type
== BT_CHARACTER
16566 && !((sym
->ts
.u
.cl
&& sym
->ts
.u
.cl
->length
) || sym
->ts
.deferred
)
16567 && !(sym
->result
&& ((sym
->result
->ts
.u
.cl
16568 && sym
->result
->ts
.u
.cl
->length
) || sym
->result
->ts
.deferred
)))
16570 gfc_error ("User operator procedure %qs at %L cannot be assumed "
16571 "character length", sym
->name
, &where
);
16575 formal
= gfc_sym_get_dummy_args (sym
);
16576 if (!formal
|| !formal
->sym
)
16578 gfc_error ("User operator procedure %qs at %L must have at least "
16579 "one argument", sym
->name
, &where
);
16583 if (formal
->sym
->attr
.intent
!= INTENT_IN
)
16585 gfc_error ("First argument of operator interface at %L must be "
16586 "INTENT(IN)", &where
);
16590 if (formal
->sym
->attr
.optional
)
16592 gfc_error ("First argument of operator interface at %L cannot be "
16593 "optional", &where
);
16597 formal
= formal
->next
;
16598 if (!formal
|| !formal
->sym
)
16601 if (formal
->sym
->attr
.intent
!= INTENT_IN
)
16603 gfc_error ("Second argument of operator interface at %L must be "
16604 "INTENT(IN)", &where
);
16608 if (formal
->sym
->attr
.optional
)
16610 gfc_error ("Second argument of operator interface at %L cannot be "
16611 "optional", &where
);
16617 gfc_error ("Operator interface at %L must have, at most, two "
16618 "arguments", &where
);
16626 gfc_resolve_uops (gfc_symtree
*symtree
)
16628 gfc_interface
*itr
;
16630 if (symtree
== NULL
)
16633 gfc_resolve_uops (symtree
->left
);
16634 gfc_resolve_uops (symtree
->right
);
16636 for (itr
= symtree
->n
.uop
->op
; itr
; itr
= itr
->next
)
16637 check_uop_procedure (itr
->sym
, itr
->sym
->declared_at
);
16641 /* Examine all of the expressions associated with a program unit,
16642 assign types to all intermediate expressions, make sure that all
16643 assignments are to compatible types and figure out which names
16644 refer to which functions or subroutines. It doesn't check code
16645 block, which is handled by gfc_resolve_code. */
16648 resolve_types (gfc_namespace
*ns
)
16654 gfc_namespace
* old_ns
= gfc_current_ns
;
16656 if (ns
->types_resolved
)
16659 /* Check that all IMPLICIT types are ok. */
16660 if (!ns
->seen_implicit_none
)
16663 for (letter
= 0; letter
!= GFC_LETTERS
; ++letter
)
16664 if (ns
->set_flag
[letter
]
16665 && !resolve_typespec_used (&ns
->default_type
[letter
],
16666 &ns
->implicit_loc
[letter
], NULL
))
16670 gfc_current_ns
= ns
;
16672 resolve_entries (ns
);
16674 resolve_common_vars (&ns
->blank_common
, false);
16675 resolve_common_blocks (ns
->common_root
);
16677 resolve_contained_functions (ns
);
16679 if (ns
->proc_name
&& ns
->proc_name
->attr
.flavor
== FL_PROCEDURE
16680 && ns
->proc_name
->attr
.if_source
== IFSRC_IFBODY
)
16681 resolve_formal_arglist (ns
->proc_name
);
16683 gfc_traverse_ns (ns
, resolve_bind_c_derived_types
);
16685 for (cl
= ns
->cl_list
; cl
; cl
= cl
->next
)
16686 resolve_charlen (cl
);
16688 gfc_traverse_ns (ns
, resolve_symbol
);
16690 resolve_fntype (ns
);
16692 for (n
= ns
->contained
; n
; n
= n
->sibling
)
16694 if (gfc_pure (ns
->proc_name
) && !gfc_pure (n
->proc_name
))
16695 gfc_error ("Contained procedure %qs at %L of a PURE procedure must "
16696 "also be PURE", n
->proc_name
->name
,
16697 &n
->proc_name
->declared_at
);
16703 gfc_do_concurrent_flag
= 0;
16704 gfc_check_interfaces (ns
);
16706 gfc_traverse_ns (ns
, resolve_values
);
16708 if (ns
->save_all
|| !flag_automatic
)
16712 for (d
= ns
->data
; d
; d
= d
->next
)
16716 gfc_traverse_ns (ns
, gfc_formalize_init_value
);
16718 gfc_traverse_ns (ns
, gfc_verify_binding_labels
);
16720 for (eq
= ns
->equiv
; eq
; eq
= eq
->next
)
16721 resolve_equivalence (eq
);
16723 /* Warn about unused labels. */
16724 if (warn_unused_label
)
16725 warn_unused_fortran_label (ns
->st_labels
);
16727 gfc_resolve_uops (ns
->uop_root
);
16729 gfc_traverse_ns (ns
, gfc_verify_DTIO_procedures
);
16731 gfc_resolve_omp_declare_simd (ns
);
16733 gfc_resolve_omp_udrs (ns
->omp_udr_root
);
16735 ns
->types_resolved
= 1;
16737 gfc_current_ns
= old_ns
;
16741 /* Call gfc_resolve_code recursively. */
16744 resolve_codes (gfc_namespace
*ns
)
16747 bitmap_obstack old_obstack
;
16749 if (ns
->resolved
== 1)
16752 for (n
= ns
->contained
; n
; n
= n
->sibling
)
16755 gfc_current_ns
= ns
;
16757 /* Don't clear 'cs_base' if this is the namespace of a BLOCK construct. */
16758 if (!(ns
->proc_name
&& ns
->proc_name
->attr
.flavor
== FL_LABEL
))
16761 /* Set to an out of range value. */
16762 current_entry_id
= -1;
16764 old_obstack
= labels_obstack
;
16765 bitmap_obstack_initialize (&labels_obstack
);
16767 gfc_resolve_oacc_declare (ns
);
16768 gfc_resolve_omp_local_vars (ns
);
16769 gfc_resolve_code (ns
->code
, ns
);
16771 bitmap_obstack_release (&labels_obstack
);
16772 labels_obstack
= old_obstack
;
16776 /* This function is called after a complete program unit has been compiled.
16777 Its purpose is to examine all of the expressions associated with a program
16778 unit, assign types to all intermediate expressions, make sure that all
16779 assignments are to compatible types and figure out which names refer to
16780 which functions or subroutines. */
16783 gfc_resolve (gfc_namespace
*ns
)
16785 gfc_namespace
*old_ns
;
16786 code_stack
*old_cs_base
;
16787 struct gfc_omp_saved_state old_omp_state
;
16793 old_ns
= gfc_current_ns
;
16794 old_cs_base
= cs_base
;
16796 /* As gfc_resolve can be called during resolution of an OpenMP construct
16797 body, we should clear any state associated to it, so that say NS's
16798 DO loops are not interpreted as OpenMP loops. */
16799 if (!ns
->construct_entities
)
16800 gfc_omp_save_and_clear_state (&old_omp_state
);
16802 resolve_types (ns
);
16803 component_assignment_level
= 0;
16804 resolve_codes (ns
);
16806 gfc_current_ns
= old_ns
;
16807 cs_base
= old_cs_base
;
16810 gfc_run_passes (ns
);
16812 if (!ns
->construct_entities
)
16813 gfc_omp_restore_state (&old_omp_state
);