1 /* Perform type resolution on the various structures.
2 Copyright (C) 2001-2019 Free Software Foundation, Inc.
3 Contributed by Andy Vaught
5 This file is part of GCC.
7 GCC is free software; you can redistribute it and/or modify it under
8 the terms of the GNU General Public License as published by the Free
9 Software Foundation; either version 3, or (at your option) any later
12 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
13 WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
17 You should have received a copy of the GNU General Public License
18 along with GCC; see the file COPYING3. If not see
19 <http://www.gnu.org/licenses/>. */
23 #include "coretypes.h"
27 #include "arith.h" /* For gfc_compare_expr(). */
28 #include "dependency.h"
30 #include "target-memory.h" /* for gfc_simplify_transfer */
31 #include "constructor.h"
33 /* Types used in equivalence statements. */
37 SEQ_NONDEFAULT
, SEQ_NUMERIC
, SEQ_CHARACTER
, SEQ_MIXED
40 /* Stack to keep track of the nesting of blocks as we move through the
41 code. See resolve_branch() and gfc_resolve_code(). */
43 typedef struct code_stack
45 struct gfc_code
*head
, *current
;
46 struct code_stack
*prev
;
48 /* This bitmap keeps track of the targets valid for a branch from
49 inside this block except for END {IF|SELECT}s of enclosing
51 bitmap reachable_labels
;
55 static code_stack
*cs_base
= NULL
;
58 /* Nonzero if we're inside a FORALL or DO CONCURRENT block. */
60 static int forall_flag
;
61 int gfc_do_concurrent_flag
;
63 /* True when we are resolving an expression that is an actual argument to
65 static bool actual_arg
= false;
66 /* True when we are resolving an expression that is the first actual argument
68 static bool first_actual_arg
= false;
71 /* Nonzero if we're inside a OpenMP WORKSHARE or PARALLEL WORKSHARE block. */
73 static int omp_workshare_flag
;
75 /* True if we are processing a formal arglist. The corresponding function
76 resets the flag each time that it is read. */
77 static bool formal_arg_flag
= false;
79 /* True if we are resolving a specification expression. */
80 static bool specification_expr
= false;
82 /* The id of the last entry seen. */
83 static int current_entry_id
;
85 /* We use bitmaps to determine if a branch target is valid. */
86 static bitmap_obstack labels_obstack
;
88 /* True when simplifying a EXPR_VARIABLE argument to an inquiry function. */
89 static bool inquiry_argument
= false;
93 gfc_is_formal_arg (void)
95 return formal_arg_flag
;
98 /* Is the symbol host associated? */
100 is_sym_host_assoc (gfc_symbol
*sym
, gfc_namespace
*ns
)
102 for (ns
= ns
->parent
; ns
; ns
= ns
->parent
)
111 /* Ensure a typespec used is valid; for instance, TYPE(t) is invalid if t is
112 an ABSTRACT derived-type. If where is not NULL, an error message with that
113 locus is printed, optionally using name. */
116 resolve_typespec_used (gfc_typespec
* ts
, locus
* where
, const char* name
)
118 if (ts
->type
== BT_DERIVED
&& ts
->u
.derived
->attr
.abstract
)
123 gfc_error ("%qs at %L is of the ABSTRACT type %qs",
124 name
, where
, ts
->u
.derived
->name
);
126 gfc_error ("ABSTRACT type %qs used at %L",
127 ts
->u
.derived
->name
, where
);
138 check_proc_interface (gfc_symbol
*ifc
, locus
*where
)
140 /* Several checks for F08:C1216. */
141 if (ifc
->attr
.procedure
)
143 gfc_error ("Interface %qs at %L is declared "
144 "in a later PROCEDURE statement", ifc
->name
, where
);
149 /* For generic interfaces, check if there is
150 a specific procedure with the same name. */
151 gfc_interface
*gen
= ifc
->generic
;
152 while (gen
&& strcmp (gen
->sym
->name
, ifc
->name
) != 0)
156 gfc_error ("Interface %qs at %L may not be generic",
161 if (ifc
->attr
.proc
== PROC_ST_FUNCTION
)
163 gfc_error ("Interface %qs at %L may not be a statement function",
167 if (gfc_is_intrinsic (ifc
, 0, ifc
->declared_at
)
168 || gfc_is_intrinsic (ifc
, 1, ifc
->declared_at
))
169 ifc
->attr
.intrinsic
= 1;
170 if (ifc
->attr
.intrinsic
&& !gfc_intrinsic_actual_ok (ifc
->name
, 0))
172 gfc_error ("Intrinsic procedure %qs not allowed in "
173 "PROCEDURE statement at %L", ifc
->name
, where
);
176 if (!ifc
->attr
.if_source
&& !ifc
->attr
.intrinsic
&& ifc
->name
[0] != '\0')
178 gfc_error ("Interface %qs at %L must be explicit", ifc
->name
, where
);
185 static void resolve_symbol (gfc_symbol
*sym
);
188 /* Resolve the interface for a PROCEDURE declaration or procedure pointer. */
191 resolve_procedure_interface (gfc_symbol
*sym
)
193 gfc_symbol
*ifc
= sym
->ts
.interface
;
200 gfc_error ("PROCEDURE %qs at %L may not be used as its own interface",
201 sym
->name
, &sym
->declared_at
);
204 if (!check_proc_interface (ifc
, &sym
->declared_at
))
207 if (ifc
->attr
.if_source
|| ifc
->attr
.intrinsic
)
209 /* Resolve interface and copy attributes. */
210 resolve_symbol (ifc
);
211 if (ifc
->attr
.intrinsic
)
212 gfc_resolve_intrinsic (ifc
, &ifc
->declared_at
);
216 sym
->ts
= ifc
->result
->ts
;
217 sym
->attr
.allocatable
= ifc
->result
->attr
.allocatable
;
218 sym
->attr
.pointer
= ifc
->result
->attr
.pointer
;
219 sym
->attr
.dimension
= ifc
->result
->attr
.dimension
;
220 sym
->attr
.class_ok
= ifc
->result
->attr
.class_ok
;
221 sym
->as
= gfc_copy_array_spec (ifc
->result
->as
);
227 sym
->attr
.allocatable
= ifc
->attr
.allocatable
;
228 sym
->attr
.pointer
= ifc
->attr
.pointer
;
229 sym
->attr
.dimension
= ifc
->attr
.dimension
;
230 sym
->attr
.class_ok
= ifc
->attr
.class_ok
;
231 sym
->as
= gfc_copy_array_spec (ifc
->as
);
233 sym
->ts
.interface
= ifc
;
234 sym
->attr
.function
= ifc
->attr
.function
;
235 sym
->attr
.subroutine
= ifc
->attr
.subroutine
;
237 sym
->attr
.pure
= ifc
->attr
.pure
;
238 sym
->attr
.elemental
= ifc
->attr
.elemental
;
239 sym
->attr
.contiguous
= ifc
->attr
.contiguous
;
240 sym
->attr
.recursive
= ifc
->attr
.recursive
;
241 sym
->attr
.always_explicit
= ifc
->attr
.always_explicit
;
242 sym
->attr
.ext_attr
|= ifc
->attr
.ext_attr
;
243 sym
->attr
.is_bind_c
= ifc
->attr
.is_bind_c
;
244 /* Copy char length. */
245 if (ifc
->ts
.type
== BT_CHARACTER
&& ifc
->ts
.u
.cl
)
247 sym
->ts
.u
.cl
= gfc_new_charlen (sym
->ns
, ifc
->ts
.u
.cl
);
248 if (sym
->ts
.u
.cl
->length
&& !sym
->ts
.u
.cl
->resolved
249 && !gfc_resolve_expr (sym
->ts
.u
.cl
->length
))
258 /* Resolve types of formal argument lists. These have to be done early so that
259 the formal argument lists of module procedures can be copied to the
260 containing module before the individual procedures are resolved
261 individually. We also resolve argument lists of procedures in interface
262 blocks because they are self-contained scoping units.
264 Since a dummy argument cannot be a non-dummy procedure, the only
265 resort left for untyped names are the IMPLICIT types. */
268 resolve_formal_arglist (gfc_symbol
*proc
)
270 gfc_formal_arglist
*f
;
272 bool saved_specification_expr
;
275 if (proc
->result
!= NULL
)
280 if (gfc_elemental (proc
)
281 || sym
->attr
.pointer
|| sym
->attr
.allocatable
282 || (sym
->as
&& sym
->as
->rank
!= 0))
284 proc
->attr
.always_explicit
= 1;
285 sym
->attr
.always_explicit
= 1;
288 formal_arg_flag
= true;
290 for (f
= proc
->formal
; f
; f
= f
->next
)
298 /* Alternate return placeholder. */
299 if (gfc_elemental (proc
))
300 gfc_error ("Alternate return specifier in elemental subroutine "
301 "%qs at %L is not allowed", proc
->name
,
303 if (proc
->attr
.function
)
304 gfc_error ("Alternate return specifier in function "
305 "%qs at %L is not allowed", proc
->name
,
309 else if (sym
->attr
.procedure
&& sym
->attr
.if_source
!= IFSRC_DECL
310 && !resolve_procedure_interface (sym
))
313 if (strcmp (proc
->name
, sym
->name
) == 0)
315 gfc_error ("Self-referential argument "
316 "%qs at %L is not allowed", sym
->name
,
321 if (sym
->attr
.if_source
!= IFSRC_UNKNOWN
)
322 resolve_formal_arglist (sym
);
324 if (sym
->attr
.subroutine
|| sym
->attr
.external
)
326 if (sym
->attr
.flavor
== FL_UNKNOWN
)
327 gfc_add_flavor (&sym
->attr
, FL_PROCEDURE
, sym
->name
, &sym
->declared_at
);
331 if (sym
->ts
.type
== BT_UNKNOWN
&& !proc
->attr
.intrinsic
332 && (!sym
->attr
.function
|| sym
->result
== sym
))
333 gfc_set_default_type (sym
, 1, sym
->ns
);
336 as
= sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
337 ? CLASS_DATA (sym
)->as
: sym
->as
;
339 saved_specification_expr
= specification_expr
;
340 specification_expr
= true;
341 gfc_resolve_array_spec (as
, 0);
342 specification_expr
= saved_specification_expr
;
344 /* We can't tell if an array with dimension (:) is assumed or deferred
345 shape until we know if it has the pointer or allocatable attributes.
347 if (as
&& as
->rank
> 0 && as
->type
== AS_DEFERRED
348 && ((sym
->ts
.type
!= BT_CLASS
349 && !(sym
->attr
.pointer
|| sym
->attr
.allocatable
))
350 || (sym
->ts
.type
== BT_CLASS
351 && !(CLASS_DATA (sym
)->attr
.class_pointer
352 || CLASS_DATA (sym
)->attr
.allocatable
)))
353 && sym
->attr
.flavor
!= FL_PROCEDURE
)
355 as
->type
= AS_ASSUMED_SHAPE
;
356 for (i
= 0; i
< as
->rank
; i
++)
357 as
->lower
[i
] = gfc_get_int_expr (gfc_default_integer_kind
, NULL
, 1);
360 if ((as
&& as
->rank
> 0 && as
->type
== AS_ASSUMED_SHAPE
)
361 || (as
&& as
->type
== AS_ASSUMED_RANK
)
362 || sym
->attr
.pointer
|| sym
->attr
.allocatable
|| sym
->attr
.target
363 || (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
364 && (CLASS_DATA (sym
)->attr
.class_pointer
365 || CLASS_DATA (sym
)->attr
.allocatable
366 || CLASS_DATA (sym
)->attr
.target
))
367 || sym
->attr
.optional
)
369 proc
->attr
.always_explicit
= 1;
371 proc
->result
->attr
.always_explicit
= 1;
374 /* If the flavor is unknown at this point, it has to be a variable.
375 A procedure specification would have already set the type. */
377 if (sym
->attr
.flavor
== FL_UNKNOWN
)
378 gfc_add_flavor (&sym
->attr
, FL_VARIABLE
, sym
->name
, &sym
->declared_at
);
382 if (sym
->attr
.flavor
== FL_PROCEDURE
)
387 gfc_error ("Dummy procedure %qs of PURE procedure at %L must "
388 "also be PURE", sym
->name
, &sym
->declared_at
);
392 else if (!sym
->attr
.pointer
)
394 if (proc
->attr
.function
&& sym
->attr
.intent
!= INTENT_IN
)
397 gfc_notify_std (GFC_STD_F2008
, "Argument %qs"
398 " of pure function %qs at %L with VALUE "
399 "attribute but without INTENT(IN)",
400 sym
->name
, proc
->name
, &sym
->declared_at
);
402 gfc_error ("Argument %qs of pure function %qs at %L must "
403 "be INTENT(IN) or VALUE", sym
->name
, proc
->name
,
407 if (proc
->attr
.subroutine
&& sym
->attr
.intent
== INTENT_UNKNOWN
)
410 gfc_notify_std (GFC_STD_F2008
, "Argument %qs"
411 " of pure subroutine %qs at %L with VALUE "
412 "attribute but without INTENT", sym
->name
,
413 proc
->name
, &sym
->declared_at
);
415 gfc_error ("Argument %qs of pure subroutine %qs at %L "
416 "must have its INTENT specified or have the "
417 "VALUE attribute", sym
->name
, proc
->name
,
423 if (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.intent
== INTENT_OUT
)
425 gfc_error ("INTENT(OUT) argument %qs of pure procedure %qs at %L"
426 " may not be polymorphic", sym
->name
, proc
->name
,
432 if (proc
->attr
.implicit_pure
)
434 if (sym
->attr
.flavor
== FL_PROCEDURE
)
437 proc
->attr
.implicit_pure
= 0;
439 else if (!sym
->attr
.pointer
)
441 if (proc
->attr
.function
&& sym
->attr
.intent
!= INTENT_IN
443 proc
->attr
.implicit_pure
= 0;
445 if (proc
->attr
.subroutine
&& sym
->attr
.intent
== INTENT_UNKNOWN
447 proc
->attr
.implicit_pure
= 0;
451 if (gfc_elemental (proc
))
454 if (sym
->attr
.codimension
455 || (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
)
456 && CLASS_DATA (sym
)->attr
.codimension
))
458 gfc_error ("Coarray dummy argument %qs at %L to elemental "
459 "procedure", sym
->name
, &sym
->declared_at
);
463 if (sym
->as
|| (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
)
464 && CLASS_DATA (sym
)->as
))
466 gfc_error ("Argument %qs of elemental procedure at %L must "
467 "be scalar", sym
->name
, &sym
->declared_at
);
471 if (sym
->attr
.allocatable
472 || (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
)
473 && CLASS_DATA (sym
)->attr
.allocatable
))
475 gfc_error ("Argument %qs of elemental procedure at %L cannot "
476 "have the ALLOCATABLE attribute", sym
->name
,
481 if (sym
->attr
.pointer
482 || (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
)
483 && CLASS_DATA (sym
)->attr
.class_pointer
))
485 gfc_error ("Argument %qs of elemental procedure at %L cannot "
486 "have the POINTER attribute", sym
->name
,
491 if (sym
->attr
.flavor
== FL_PROCEDURE
)
493 gfc_error ("Dummy procedure %qs not allowed in elemental "
494 "procedure %qs at %L", sym
->name
, proc
->name
,
499 /* Fortran 2008 Corrigendum 1, C1290a. */
500 if (sym
->attr
.intent
== INTENT_UNKNOWN
&& !sym
->attr
.value
)
502 gfc_error ("Argument %qs of elemental procedure %qs at %L must "
503 "have its INTENT specified or have the VALUE "
504 "attribute", sym
->name
, proc
->name
,
510 /* Each dummy shall be specified to be scalar. */
511 if (proc
->attr
.proc
== PROC_ST_FUNCTION
)
515 /* F03:C1263 (R1238) The function-name and each dummy-arg-name
516 shall be specified, explicitly or implicitly, to be scalar. */
517 gfc_error ("Argument '%s' of statement function '%s' at %L "
518 "must be scalar", sym
->name
, proc
->name
,
523 if (sym
->ts
.type
== BT_CHARACTER
)
525 gfc_charlen
*cl
= sym
->ts
.u
.cl
;
526 if (!cl
|| !cl
->length
|| cl
->length
->expr_type
!= EXPR_CONSTANT
)
528 gfc_error ("Character-valued argument %qs of statement "
529 "function at %L must have constant length",
530 sym
->name
, &sym
->declared_at
);
536 formal_arg_flag
= false;
540 /* Work function called when searching for symbols that have argument lists
541 associated with them. */
544 find_arglists (gfc_symbol
*sym
)
546 if (sym
->attr
.if_source
== IFSRC_UNKNOWN
|| sym
->ns
!= gfc_current_ns
547 || gfc_fl_struct (sym
->attr
.flavor
) || sym
->attr
.intrinsic
)
550 resolve_formal_arglist (sym
);
554 /* Given a namespace, resolve all formal argument lists within the namespace.
558 resolve_formal_arglists (gfc_namespace
*ns
)
563 gfc_traverse_ns (ns
, find_arglists
);
568 resolve_contained_fntype (gfc_symbol
*sym
, gfc_namespace
*ns
)
572 if (sym
&& sym
->attr
.flavor
== FL_PROCEDURE
574 && sym
->ns
->parent
->proc_name
575 && sym
->ns
->parent
->proc_name
->attr
.flavor
== FL_PROCEDURE
576 && !strcmp (sym
->name
, sym
->ns
->parent
->proc_name
->name
))
577 gfc_error ("Contained procedure %qs at %L has the same name as its "
578 "encompassing procedure", sym
->name
, &sym
->declared_at
);
580 /* If this namespace is not a function or an entry master function,
582 if (! sym
|| !(sym
->attr
.function
|| sym
->attr
.flavor
== FL_VARIABLE
)
583 || sym
->attr
.entry_master
)
586 /* Try to find out of what the return type is. */
587 if (sym
->result
->ts
.type
== BT_UNKNOWN
&& sym
->result
->ts
.interface
== NULL
)
589 t
= gfc_set_default_type (sym
->result
, 0, ns
);
591 if (!t
&& !sym
->result
->attr
.untyped
)
593 if (sym
->result
== sym
)
594 gfc_error ("Contained function %qs at %L has no IMPLICIT type",
595 sym
->name
, &sym
->declared_at
);
596 else if (!sym
->result
->attr
.proc_pointer
)
597 gfc_error ("Result %qs of contained function %qs at %L has "
598 "no IMPLICIT type", sym
->result
->name
, sym
->name
,
599 &sym
->result
->declared_at
);
600 sym
->result
->attr
.untyped
= 1;
604 /* Fortran 2008 Draft Standard, page 535, C418, on type-param-value
605 type, lists the only ways a character length value of * can be used:
606 dummy arguments of procedures, named constants, function results and
607 in allocate statements if the allocate_object is an assumed length dummy
608 in external functions. Internal function results and results of module
609 procedures are not on this list, ergo, not permitted. */
611 if (sym
->result
->ts
.type
== BT_CHARACTER
)
613 gfc_charlen
*cl
= sym
->result
->ts
.u
.cl
;
614 if ((!cl
|| !cl
->length
) && !sym
->result
->ts
.deferred
)
616 /* See if this is a module-procedure and adapt error message
619 gcc_assert (ns
->parent
&& ns
->parent
->proc_name
);
620 module_proc
= (ns
->parent
->proc_name
->attr
.flavor
== FL_MODULE
);
622 gfc_error (module_proc
623 ? G_("Character-valued module procedure %qs at %L"
624 " must not be assumed length")
625 : G_("Character-valued internal function %qs at %L"
626 " must not be assumed length"),
627 sym
->name
, &sym
->declared_at
);
633 /* Add NEW_ARGS to the formal argument list of PROC, taking care not to
634 introduce duplicates. */
637 merge_argument_lists (gfc_symbol
*proc
, gfc_formal_arglist
*new_args
)
639 gfc_formal_arglist
*f
, *new_arglist
;
642 for (; new_args
!= NULL
; new_args
= new_args
->next
)
644 new_sym
= new_args
->sym
;
645 /* See if this arg is already in the formal argument list. */
646 for (f
= proc
->formal
; f
; f
= f
->next
)
648 if (new_sym
== f
->sym
)
655 /* Add a new argument. Argument order is not important. */
656 new_arglist
= gfc_get_formal_arglist ();
657 new_arglist
->sym
= new_sym
;
658 new_arglist
->next
= proc
->formal
;
659 proc
->formal
= new_arglist
;
664 /* Flag the arguments that are not present in all entries. */
667 check_argument_lists (gfc_symbol
*proc
, gfc_formal_arglist
*new_args
)
669 gfc_formal_arglist
*f
, *head
;
672 for (f
= proc
->formal
; f
; f
= f
->next
)
677 for (new_args
= head
; new_args
; new_args
= new_args
->next
)
679 if (new_args
->sym
== f
->sym
)
686 f
->sym
->attr
.not_always_present
= 1;
691 /* Resolve alternate entry points. If a symbol has multiple entry points we
692 create a new master symbol for the main routine, and turn the existing
693 symbol into an entry point. */
696 resolve_entries (gfc_namespace
*ns
)
698 gfc_namespace
*old_ns
;
702 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
703 static int master_count
= 0;
705 if (ns
->proc_name
== NULL
)
708 /* No need to do anything if this procedure doesn't have alternate entry
713 /* We may already have resolved alternate entry points. */
714 if (ns
->proc_name
->attr
.entry_master
)
717 /* If this isn't a procedure something has gone horribly wrong. */
718 gcc_assert (ns
->proc_name
->attr
.flavor
== FL_PROCEDURE
);
720 /* Remember the current namespace. */
721 old_ns
= gfc_current_ns
;
725 /* Add the main entry point to the list of entry points. */
726 el
= gfc_get_entry_list ();
727 el
->sym
= ns
->proc_name
;
729 el
->next
= ns
->entries
;
731 ns
->proc_name
->attr
.entry
= 1;
733 /* If it is a module function, it needs to be in the right namespace
734 so that gfc_get_fake_result_decl can gather up the results. The
735 need for this arose in get_proc_name, where these beasts were
736 left in their own namespace, to keep prior references linked to
737 the entry declaration.*/
738 if (ns
->proc_name
->attr
.function
739 && ns
->parent
&& ns
->parent
->proc_name
->attr
.flavor
== FL_MODULE
)
742 /* Do the same for entries where the master is not a module
743 procedure. These are retained in the module namespace because
744 of the module procedure declaration. */
745 for (el
= el
->next
; el
; el
= el
->next
)
746 if (el
->sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
747 && el
->sym
->attr
.mod_proc
)
751 /* Add an entry statement for it. */
752 c
= gfc_get_code (EXEC_ENTRY
);
757 /* Create a new symbol for the master function. */
758 /* Give the internal function a unique name (within this file).
759 Also include the function name so the user has some hope of figuring
760 out what is going on. */
761 snprintf (name
, GFC_MAX_SYMBOL_LEN
, "master.%d.%s",
762 master_count
++, ns
->proc_name
->name
);
763 gfc_get_ha_symbol (name
, &proc
);
764 gcc_assert (proc
!= NULL
);
766 gfc_add_procedure (&proc
->attr
, PROC_INTERNAL
, proc
->name
, NULL
);
767 if (ns
->proc_name
->attr
.subroutine
)
768 gfc_add_subroutine (&proc
->attr
, proc
->name
, NULL
);
772 gfc_typespec
*ts
, *fts
;
773 gfc_array_spec
*as
, *fas
;
774 gfc_add_function (&proc
->attr
, proc
->name
, NULL
);
776 fas
= ns
->entries
->sym
->as
;
777 fas
= fas
? fas
: ns
->entries
->sym
->result
->as
;
778 fts
= &ns
->entries
->sym
->result
->ts
;
779 if (fts
->type
== BT_UNKNOWN
)
780 fts
= gfc_get_default_type (ns
->entries
->sym
->result
->name
, NULL
);
781 for (el
= ns
->entries
->next
; el
; el
= el
->next
)
783 ts
= &el
->sym
->result
->ts
;
785 as
= as
? as
: el
->sym
->result
->as
;
786 if (ts
->type
== BT_UNKNOWN
)
787 ts
= gfc_get_default_type (el
->sym
->result
->name
, NULL
);
789 if (! gfc_compare_types (ts
, fts
)
790 || (el
->sym
->result
->attr
.dimension
791 != ns
->entries
->sym
->result
->attr
.dimension
)
792 || (el
->sym
->result
->attr
.pointer
793 != ns
->entries
->sym
->result
->attr
.pointer
))
795 else if (as
&& fas
&& ns
->entries
->sym
->result
!= el
->sym
->result
796 && gfc_compare_array_spec (as
, fas
) == 0)
797 gfc_error ("Function %s at %L has entries with mismatched "
798 "array specifications", ns
->entries
->sym
->name
,
799 &ns
->entries
->sym
->declared_at
);
800 /* The characteristics need to match and thus both need to have
801 the same string length, i.e. both len=*, or both len=4.
802 Having both len=<variable> is also possible, but difficult to
803 check at compile time. */
804 else if (ts
->type
== BT_CHARACTER
&& ts
->u
.cl
&& fts
->u
.cl
805 && (((ts
->u
.cl
->length
&& !fts
->u
.cl
->length
)
806 ||(!ts
->u
.cl
->length
&& fts
->u
.cl
->length
))
808 && ts
->u
.cl
->length
->expr_type
809 != fts
->u
.cl
->length
->expr_type
)
811 && ts
->u
.cl
->length
->expr_type
== EXPR_CONSTANT
812 && mpz_cmp (ts
->u
.cl
->length
->value
.integer
,
813 fts
->u
.cl
->length
->value
.integer
) != 0)))
814 gfc_notify_std (GFC_STD_GNU
, "Function %s at %L with "
815 "entries returning variables of different "
816 "string lengths", ns
->entries
->sym
->name
,
817 &ns
->entries
->sym
->declared_at
);
822 sym
= ns
->entries
->sym
->result
;
823 /* All result types the same. */
825 if (sym
->attr
.dimension
)
826 gfc_set_array_spec (proc
, gfc_copy_array_spec (sym
->as
), NULL
);
827 if (sym
->attr
.pointer
)
828 gfc_add_pointer (&proc
->attr
, NULL
);
832 /* Otherwise the result will be passed through a union by
834 proc
->attr
.mixed_entry_master
= 1;
835 for (el
= ns
->entries
; el
; el
= el
->next
)
837 sym
= el
->sym
->result
;
838 if (sym
->attr
.dimension
)
840 if (el
== ns
->entries
)
841 gfc_error ("FUNCTION result %s can't be an array in "
842 "FUNCTION %s at %L", sym
->name
,
843 ns
->entries
->sym
->name
, &sym
->declared_at
);
845 gfc_error ("ENTRY result %s can't be an array in "
846 "FUNCTION %s at %L", sym
->name
,
847 ns
->entries
->sym
->name
, &sym
->declared_at
);
849 else if (sym
->attr
.pointer
)
851 if (el
== ns
->entries
)
852 gfc_error ("FUNCTION result %s can't be a POINTER in "
853 "FUNCTION %s at %L", sym
->name
,
854 ns
->entries
->sym
->name
, &sym
->declared_at
);
856 gfc_error ("ENTRY result %s can't be a POINTER in "
857 "FUNCTION %s at %L", sym
->name
,
858 ns
->entries
->sym
->name
, &sym
->declared_at
);
863 if (ts
->type
== BT_UNKNOWN
)
864 ts
= gfc_get_default_type (sym
->name
, NULL
);
868 if (ts
->kind
== gfc_default_integer_kind
)
872 if (ts
->kind
== gfc_default_real_kind
873 || ts
->kind
== gfc_default_double_kind
)
877 if (ts
->kind
== gfc_default_complex_kind
)
881 if (ts
->kind
== gfc_default_logical_kind
)
885 /* We will issue error elsewhere. */
893 if (el
== ns
->entries
)
894 gfc_error ("FUNCTION result %s can't be of type %s "
895 "in FUNCTION %s at %L", sym
->name
,
896 gfc_typename (ts
), ns
->entries
->sym
->name
,
899 gfc_error ("ENTRY result %s can't be of type %s "
900 "in FUNCTION %s at %L", sym
->name
,
901 gfc_typename (ts
), ns
->entries
->sym
->name
,
908 proc
->attr
.access
= ACCESS_PRIVATE
;
909 proc
->attr
.entry_master
= 1;
911 /* Merge all the entry point arguments. */
912 for (el
= ns
->entries
; el
; el
= el
->next
)
913 merge_argument_lists (proc
, el
->sym
->formal
);
915 /* Check the master formal arguments for any that are not
916 present in all entry points. */
917 for (el
= ns
->entries
; el
; el
= el
->next
)
918 check_argument_lists (proc
, el
->sym
->formal
);
920 /* Use the master function for the function body. */
921 ns
->proc_name
= proc
;
923 /* Finalize the new symbols. */
924 gfc_commit_symbols ();
926 /* Restore the original namespace. */
927 gfc_current_ns
= old_ns
;
931 /* Resolve common variables. */
933 resolve_common_vars (gfc_common_head
*common_block
, bool named_common
)
935 gfc_symbol
*csym
= common_block
->head
;
937 for (; csym
; csym
= csym
->common_next
)
939 /* gfc_add_in_common may have been called before, but the reported errors
940 have been ignored to continue parsing.
941 We do the checks again here. */
942 if (!csym
->attr
.use_assoc
)
943 gfc_add_in_common (&csym
->attr
, csym
->name
, &common_block
->where
);
945 if (csym
->value
|| csym
->attr
.data
)
947 if (!csym
->ns
->is_block_data
)
948 gfc_notify_std (GFC_STD_GNU
, "Variable %qs at %L is in COMMON "
949 "but only in BLOCK DATA initialization is "
950 "allowed", csym
->name
, &csym
->declared_at
);
951 else if (!named_common
)
952 gfc_notify_std (GFC_STD_GNU
, "Initialized variable %qs at %L is "
953 "in a blank COMMON but initialization is only "
954 "allowed in named common blocks", csym
->name
,
958 if (UNLIMITED_POLY (csym
))
959 gfc_error_now ("%qs in cannot appear in COMMON at %L "
960 "[F2008:C5100]", csym
->name
, &csym
->declared_at
);
962 if (csym
->ts
.type
!= BT_DERIVED
)
965 if (!(csym
->ts
.u
.derived
->attr
.sequence
966 || csym
->ts
.u
.derived
->attr
.is_bind_c
))
967 gfc_error_now ("Derived type variable %qs in COMMON at %L "
968 "has neither the SEQUENCE nor the BIND(C) "
969 "attribute", csym
->name
, &csym
->declared_at
);
970 if (csym
->ts
.u
.derived
->attr
.alloc_comp
)
971 gfc_error_now ("Derived type variable %qs in COMMON at %L "
972 "has an ultimate component that is "
973 "allocatable", csym
->name
, &csym
->declared_at
);
974 if (gfc_has_default_initializer (csym
->ts
.u
.derived
))
975 gfc_error_now ("Derived type variable %qs in COMMON at %L "
976 "may not have default initializer", csym
->name
,
979 if (csym
->attr
.flavor
== FL_UNKNOWN
&& !csym
->attr
.proc_pointer
)
980 gfc_add_flavor (&csym
->attr
, FL_VARIABLE
, csym
->name
, &csym
->declared_at
);
984 /* Resolve common blocks. */
986 resolve_common_blocks (gfc_symtree
*common_root
)
991 if (common_root
== NULL
)
994 if (common_root
->left
)
995 resolve_common_blocks (common_root
->left
);
996 if (common_root
->right
)
997 resolve_common_blocks (common_root
->right
);
999 resolve_common_vars (common_root
->n
.common
, true);
1001 if (!gfc_notify_std (GFC_STD_F2018_OBS
, "COMMON block at %L",
1002 &common_root
->n
.common
->where
))
1005 /* The common name is a global name - in Fortran 2003 also if it has a
1006 C binding name, since Fortran 2008 only the C binding name is a global
1008 if (!common_root
->n
.common
->binding_label
1009 || gfc_notification_std (GFC_STD_F2008
))
1011 gsym
= gfc_find_gsymbol (gfc_gsym_root
,
1012 common_root
->n
.common
->name
);
1014 if (gsym
&& gfc_notification_std (GFC_STD_F2008
)
1015 && gsym
->type
== GSYM_COMMON
1016 && ((common_root
->n
.common
->binding_label
1017 && (!gsym
->binding_label
1018 || strcmp (common_root
->n
.common
->binding_label
,
1019 gsym
->binding_label
) != 0))
1020 || (!common_root
->n
.common
->binding_label
1021 && gsym
->binding_label
)))
1023 gfc_error ("In Fortran 2003 COMMON %qs block at %L is a global "
1024 "identifier and must thus have the same binding name "
1025 "as the same-named COMMON block at %L: %s vs %s",
1026 common_root
->n
.common
->name
, &common_root
->n
.common
->where
,
1028 common_root
->n
.common
->binding_label
1029 ? common_root
->n
.common
->binding_label
: "(blank)",
1030 gsym
->binding_label
? gsym
->binding_label
: "(blank)");
1034 if (gsym
&& gsym
->type
!= GSYM_COMMON
1035 && !common_root
->n
.common
->binding_label
)
1037 gfc_error ("COMMON block %qs at %L uses the same global identifier "
1039 common_root
->n
.common
->name
, &common_root
->n
.common
->where
,
1043 if (gsym
&& gsym
->type
!= GSYM_COMMON
)
1045 gfc_error ("Fortran 2008: COMMON block %qs with binding label at "
1046 "%L sharing the identifier with global non-COMMON-block "
1047 "entity at %L", common_root
->n
.common
->name
,
1048 &common_root
->n
.common
->where
, &gsym
->where
);
1053 gsym
= gfc_get_gsymbol (common_root
->n
.common
->name
);
1054 gsym
->type
= GSYM_COMMON
;
1055 gsym
->where
= common_root
->n
.common
->where
;
1061 if (common_root
->n
.common
->binding_label
)
1063 gsym
= gfc_find_gsymbol (gfc_gsym_root
,
1064 common_root
->n
.common
->binding_label
);
1065 if (gsym
&& gsym
->type
!= GSYM_COMMON
)
1067 gfc_error ("COMMON block at %L with binding label %qs uses the same "
1068 "global identifier as entity at %L",
1069 &common_root
->n
.common
->where
,
1070 common_root
->n
.common
->binding_label
, &gsym
->where
);
1075 gsym
= gfc_get_gsymbol (common_root
->n
.common
->binding_label
);
1076 gsym
->type
= GSYM_COMMON
;
1077 gsym
->where
= common_root
->n
.common
->where
;
1083 gfc_find_symbol (common_root
->name
, gfc_current_ns
, 0, &sym
);
1087 if (sym
->attr
.flavor
== FL_PARAMETER
)
1088 gfc_error ("COMMON block %qs at %L is used as PARAMETER at %L",
1089 sym
->name
, &common_root
->n
.common
->where
, &sym
->declared_at
);
1091 if (sym
->attr
.external
)
1092 gfc_error ("COMMON block %qs at %L cannot have the EXTERNAL attribute",
1093 sym
->name
, &common_root
->n
.common
->where
);
1095 if (sym
->attr
.intrinsic
)
1096 gfc_error ("COMMON block %qs at %L is also an intrinsic procedure",
1097 sym
->name
, &common_root
->n
.common
->where
);
1098 else if (sym
->attr
.result
1099 || gfc_is_function_return_value (sym
, gfc_current_ns
))
1100 gfc_notify_std (GFC_STD_F2003
, "COMMON block %qs at %L "
1101 "that is also a function result", sym
->name
,
1102 &common_root
->n
.common
->where
);
1103 else if (sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.proc
!= PROC_INTERNAL
1104 && sym
->attr
.proc
!= PROC_ST_FUNCTION
)
1105 gfc_notify_std (GFC_STD_F2003
, "COMMON block %qs at %L "
1106 "that is also a global procedure", sym
->name
,
1107 &common_root
->n
.common
->where
);
1111 /* Resolve contained function types. Because contained functions can call one
1112 another, they have to be worked out before any of the contained procedures
1115 The good news is that if a function doesn't already have a type, the only
1116 way it can get one is through an IMPLICIT type or a RESULT variable, because
1117 by definition contained functions are contained namespace they're contained
1118 in, not in a sibling or parent namespace. */
1121 resolve_contained_functions (gfc_namespace
*ns
)
1123 gfc_namespace
*child
;
1126 resolve_formal_arglists (ns
);
1128 for (child
= ns
->contained
; child
; child
= child
->sibling
)
1130 /* Resolve alternate entry points first. */
1131 resolve_entries (child
);
1133 /* Then check function return types. */
1134 resolve_contained_fntype (child
->proc_name
, child
);
1135 for (el
= child
->entries
; el
; el
= el
->next
)
1136 resolve_contained_fntype (el
->sym
, child
);
1142 /* A Parameterized Derived Type constructor must contain values for
1143 the PDT KIND parameters or they must have a default initializer.
1144 Go through the constructor picking out the KIND expressions,
1145 storing them in 'param_list' and then call gfc_get_pdt_instance
1146 to obtain the PDT instance. */
1148 static gfc_actual_arglist
*param_list
, *param_tail
, *param
;
1151 get_pdt_spec_expr (gfc_component
*c
, gfc_expr
*expr
)
1153 param
= gfc_get_actual_arglist ();
1155 param_list
= param_tail
= param
;
1158 param_tail
->next
= param
;
1159 param_tail
= param_tail
->next
;
1162 param_tail
->name
= c
->name
;
1164 param_tail
->expr
= gfc_copy_expr (expr
);
1165 else if (c
->initializer
)
1166 param_tail
->expr
= gfc_copy_expr (c
->initializer
);
1169 param_tail
->spec_type
= SPEC_ASSUMED
;
1170 if (c
->attr
.pdt_kind
)
1172 gfc_error ("The KIND parameter %qs in the PDT constructor "
1173 "at %C has no value", param
->name
);
1182 get_pdt_constructor (gfc_expr
*expr
, gfc_constructor
**constr
,
1183 gfc_symbol
*derived
)
1185 gfc_constructor
*cons
= NULL
;
1186 gfc_component
*comp
;
1189 if (expr
&& expr
->expr_type
== EXPR_STRUCTURE
)
1190 cons
= gfc_constructor_first (expr
->value
.constructor
);
1195 comp
= derived
->components
;
1197 for (; comp
&& cons
; comp
= comp
->next
, cons
= gfc_constructor_next (cons
))
1200 && cons
->expr
->expr_type
== EXPR_STRUCTURE
1201 && comp
->ts
.type
== BT_DERIVED
)
1203 t
= get_pdt_constructor (cons
->expr
, NULL
, comp
->ts
.u
.derived
);
1207 else if (comp
->ts
.type
== BT_DERIVED
)
1209 t
= get_pdt_constructor (NULL
, &cons
, comp
->ts
.u
.derived
);
1213 else if ((comp
->attr
.pdt_kind
|| comp
->attr
.pdt_len
)
1214 && derived
->attr
.pdt_template
)
1216 t
= get_pdt_spec_expr (comp
, cons
->expr
);
1225 static bool resolve_fl_derived0 (gfc_symbol
*sym
);
1226 static bool resolve_fl_struct (gfc_symbol
*sym
);
1229 /* Resolve all of the elements of a structure constructor and make sure that
1230 the types are correct. The 'init' flag indicates that the given
1231 constructor is an initializer. */
1234 resolve_structure_cons (gfc_expr
*expr
, int init
)
1236 gfc_constructor
*cons
;
1237 gfc_component
*comp
;
1243 if (expr
->ts
.type
== BT_DERIVED
|| expr
->ts
.type
== BT_UNION
)
1245 if (expr
->ts
.u
.derived
->attr
.flavor
== FL_DERIVED
)
1246 resolve_fl_derived0 (expr
->ts
.u
.derived
);
1248 resolve_fl_struct (expr
->ts
.u
.derived
);
1250 /* If this is a Parameterized Derived Type template, find the
1251 instance corresponding to the PDT kind parameters. */
1252 if (expr
->ts
.u
.derived
->attr
.pdt_template
)
1255 t
= get_pdt_constructor (expr
, NULL
, expr
->ts
.u
.derived
);
1258 gfc_get_pdt_instance (param_list
, &expr
->ts
.u
.derived
, NULL
);
1260 expr
->param_list
= gfc_copy_actual_arglist (param_list
);
1263 gfc_free_actual_arglist (param_list
);
1265 if (!expr
->ts
.u
.derived
->attr
.pdt_type
)
1270 cons
= gfc_constructor_first (expr
->value
.constructor
);
1272 /* A constructor may have references if it is the result of substituting a
1273 parameter variable. In this case we just pull out the component we
1276 comp
= expr
->ref
->u
.c
.sym
->components
;
1278 comp
= expr
->ts
.u
.derived
->components
;
1280 for (; comp
&& cons
; comp
= comp
->next
, cons
= gfc_constructor_next (cons
))
1287 /* Unions use an EXPR_NULL contrived expression to tell the translation
1288 phase to generate an initializer of the appropriate length.
1290 if (cons
->expr
->ts
.type
== BT_UNION
&& cons
->expr
->expr_type
== EXPR_NULL
)
1293 if (!gfc_resolve_expr (cons
->expr
))
1299 rank
= comp
->as
? comp
->as
->rank
: 0;
1300 if (comp
->ts
.type
== BT_CLASS
1301 && !comp
->ts
.u
.derived
->attr
.unlimited_polymorphic
1302 && CLASS_DATA (comp
)->as
)
1303 rank
= CLASS_DATA (comp
)->as
->rank
;
1305 if (cons
->expr
->expr_type
!= EXPR_NULL
&& rank
!= cons
->expr
->rank
1306 && (comp
->attr
.allocatable
|| cons
->expr
->rank
))
1308 gfc_error ("The rank of the element in the structure "
1309 "constructor at %L does not match that of the "
1310 "component (%d/%d)", &cons
->expr
->where
,
1311 cons
->expr
->rank
, rank
);
1315 /* If we don't have the right type, try to convert it. */
1317 if (!comp
->attr
.proc_pointer
&&
1318 !gfc_compare_types (&cons
->expr
->ts
, &comp
->ts
))
1320 if (strcmp (comp
->name
, "_extends") == 0)
1322 /* Can afford to be brutal with the _extends initializer.
1323 The derived type can get lost because it is PRIVATE
1324 but it is not usage constrained by the standard. */
1325 cons
->expr
->ts
= comp
->ts
;
1327 else if (comp
->attr
.pointer
&& cons
->expr
->ts
.type
!= BT_UNKNOWN
)
1329 gfc_error ("The element in the structure constructor at %L, "
1330 "for pointer component %qs, is %s but should be %s",
1331 &cons
->expr
->where
, comp
->name
,
1332 gfc_basic_typename (cons
->expr
->ts
.type
),
1333 gfc_basic_typename (comp
->ts
.type
));
1338 bool t2
= gfc_convert_type (cons
->expr
, &comp
->ts
, 1);
1344 /* For strings, the length of the constructor should be the same as
1345 the one of the structure, ensure this if the lengths are known at
1346 compile time and when we are dealing with PARAMETER or structure
1348 if (cons
->expr
->ts
.type
== BT_CHARACTER
&& comp
->ts
.u
.cl
1349 && comp
->ts
.u
.cl
->length
1350 && comp
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
1351 && cons
->expr
->ts
.u
.cl
&& cons
->expr
->ts
.u
.cl
->length
1352 && cons
->expr
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
1353 && cons
->expr
->rank
!= 0
1354 && mpz_cmp (cons
->expr
->ts
.u
.cl
->length
->value
.integer
,
1355 comp
->ts
.u
.cl
->length
->value
.integer
) != 0)
1357 if (cons
->expr
->expr_type
== EXPR_VARIABLE
1358 && cons
->expr
->symtree
->n
.sym
->attr
.flavor
== FL_PARAMETER
)
1360 /* Wrap the parameter in an array constructor (EXPR_ARRAY)
1361 to make use of the gfc_resolve_character_array_constructor
1362 machinery. The expression is later simplified away to
1363 an array of string literals. */
1364 gfc_expr
*para
= cons
->expr
;
1365 cons
->expr
= gfc_get_expr ();
1366 cons
->expr
->ts
= para
->ts
;
1367 cons
->expr
->where
= para
->where
;
1368 cons
->expr
->expr_type
= EXPR_ARRAY
;
1369 cons
->expr
->rank
= para
->rank
;
1370 cons
->expr
->shape
= gfc_copy_shape (para
->shape
, para
->rank
);
1371 gfc_constructor_append_expr (&cons
->expr
->value
.constructor
,
1372 para
, &cons
->expr
->where
);
1375 if (cons
->expr
->expr_type
== EXPR_ARRAY
)
1377 /* Rely on the cleanup of the namespace to deal correctly with
1378 the old charlen. (There was a block here that attempted to
1379 remove the charlen but broke the chain in so doing.) */
1380 cons
->expr
->ts
.u
.cl
= gfc_new_charlen (gfc_current_ns
, NULL
);
1381 cons
->expr
->ts
.u
.cl
->length_from_typespec
= true;
1382 cons
->expr
->ts
.u
.cl
->length
= gfc_copy_expr (comp
->ts
.u
.cl
->length
);
1383 gfc_resolve_character_array_constructor (cons
->expr
);
1387 if (cons
->expr
->expr_type
== EXPR_NULL
1388 && !(comp
->attr
.pointer
|| comp
->attr
.allocatable
1389 || comp
->attr
.proc_pointer
|| comp
->ts
.f90_type
== BT_VOID
1390 || (comp
->ts
.type
== BT_CLASS
1391 && (CLASS_DATA (comp
)->attr
.class_pointer
1392 || CLASS_DATA (comp
)->attr
.allocatable
))))
1395 gfc_error ("The NULL in the structure constructor at %L is "
1396 "being applied to component %qs, which is neither "
1397 "a POINTER nor ALLOCATABLE", &cons
->expr
->where
,
1401 if (comp
->attr
.proc_pointer
&& comp
->ts
.interface
)
1403 /* Check procedure pointer interface. */
1404 gfc_symbol
*s2
= NULL
;
1409 c2
= gfc_get_proc_ptr_comp (cons
->expr
);
1412 s2
= c2
->ts
.interface
;
1415 else if (cons
->expr
->expr_type
== EXPR_FUNCTION
)
1417 s2
= cons
->expr
->symtree
->n
.sym
->result
;
1418 name
= cons
->expr
->symtree
->n
.sym
->result
->name
;
1420 else if (cons
->expr
->expr_type
!= EXPR_NULL
)
1422 s2
= cons
->expr
->symtree
->n
.sym
;
1423 name
= cons
->expr
->symtree
->n
.sym
->name
;
1426 if (s2
&& !gfc_compare_interfaces (comp
->ts
.interface
, s2
, name
, 0, 1,
1427 err
, sizeof (err
), NULL
, NULL
))
1429 gfc_error_opt (OPT_Wargument_mismatch
,
1430 "Interface mismatch for procedure-pointer "
1431 "component %qs in structure constructor at %L:"
1432 " %s", comp
->name
, &cons
->expr
->where
, err
);
1437 if (!comp
->attr
.pointer
|| comp
->attr
.proc_pointer
1438 || cons
->expr
->expr_type
== EXPR_NULL
)
1441 a
= gfc_expr_attr (cons
->expr
);
1443 if (!a
.pointer
&& !a
.target
)
1446 gfc_error ("The element in the structure constructor at %L, "
1447 "for pointer component %qs should be a POINTER or "
1448 "a TARGET", &cons
->expr
->where
, comp
->name
);
1453 /* F08:C461. Additional checks for pointer initialization. */
1457 gfc_error ("Pointer initialization target at %L "
1458 "must not be ALLOCATABLE", &cons
->expr
->where
);
1463 gfc_error ("Pointer initialization target at %L "
1464 "must have the SAVE attribute", &cons
->expr
->where
);
1468 /* F2003, C1272 (3). */
1469 bool impure
= cons
->expr
->expr_type
== EXPR_VARIABLE
1470 && (gfc_impure_variable (cons
->expr
->symtree
->n
.sym
)
1471 || gfc_is_coindexed (cons
->expr
));
1472 if (impure
&& gfc_pure (NULL
))
1475 gfc_error ("Invalid expression in the structure constructor for "
1476 "pointer component %qs at %L in PURE procedure",
1477 comp
->name
, &cons
->expr
->where
);
1481 gfc_unset_implicit_pure (NULL
);
1488 /****************** Expression name resolution ******************/
1490 /* Returns 0 if a symbol was not declared with a type or
1491 attribute declaration statement, nonzero otherwise. */
1494 was_declared (gfc_symbol
*sym
)
1500 if (!a
.implicit_type
&& sym
->ts
.type
!= BT_UNKNOWN
)
1503 if (a
.allocatable
|| a
.dimension
|| a
.dummy
|| a
.external
|| a
.intrinsic
1504 || a
.optional
|| a
.pointer
|| a
.save
|| a
.target
|| a
.volatile_
1505 || a
.value
|| a
.access
!= ACCESS_UNKNOWN
|| a
.intent
!= INTENT_UNKNOWN
1506 || a
.asynchronous
|| a
.codimension
)
1513 /* Determine if a symbol is generic or not. */
1516 generic_sym (gfc_symbol
*sym
)
1520 if (sym
->attr
.generic
||
1521 (sym
->attr
.intrinsic
&& gfc_generic_intrinsic (sym
->name
)))
1524 if (was_declared (sym
) || sym
->ns
->parent
== NULL
)
1527 gfc_find_symbol (sym
->name
, sym
->ns
->parent
, 1, &s
);
1534 return generic_sym (s
);
1541 /* Determine if a symbol is specific or not. */
1544 specific_sym (gfc_symbol
*sym
)
1548 if (sym
->attr
.if_source
== IFSRC_IFBODY
1549 || sym
->attr
.proc
== PROC_MODULE
1550 || sym
->attr
.proc
== PROC_INTERNAL
1551 || sym
->attr
.proc
== PROC_ST_FUNCTION
1552 || (sym
->attr
.intrinsic
&& gfc_specific_intrinsic (sym
->name
))
1553 || sym
->attr
.external
)
1556 if (was_declared (sym
) || sym
->ns
->parent
== NULL
)
1559 gfc_find_symbol (sym
->name
, sym
->ns
->parent
, 1, &s
);
1561 return (s
== NULL
) ? 0 : specific_sym (s
);
1565 /* Figure out if the procedure is specific, generic or unknown. */
1568 { PTYPE_GENERIC
= 1, PTYPE_SPECIFIC
, PTYPE_UNKNOWN
};
1571 procedure_kind (gfc_symbol
*sym
)
1573 if (generic_sym (sym
))
1574 return PTYPE_GENERIC
;
1576 if (specific_sym (sym
))
1577 return PTYPE_SPECIFIC
;
1579 return PTYPE_UNKNOWN
;
1582 /* Check references to assumed size arrays. The flag need_full_assumed_size
1583 is nonzero when matching actual arguments. */
1585 static int need_full_assumed_size
= 0;
1588 check_assumed_size_reference (gfc_symbol
*sym
, gfc_expr
*e
)
1590 if (need_full_assumed_size
|| !(sym
->as
&& sym
->as
->type
== AS_ASSUMED_SIZE
))
1593 /* FIXME: The comparison "e->ref->u.ar.type == AR_FULL" is wrong.
1594 What should it be? */
1595 if (e
->ref
&& (e
->ref
->u
.ar
.end
[e
->ref
->u
.ar
.as
->rank
- 1] == NULL
)
1596 && (e
->ref
->u
.ar
.as
->type
== AS_ASSUMED_SIZE
)
1597 && (e
->ref
->u
.ar
.type
== AR_FULL
))
1599 gfc_error ("The upper bound in the last dimension must "
1600 "appear in the reference to the assumed size "
1601 "array %qs at %L", sym
->name
, &e
->where
);
1608 /* Look for bad assumed size array references in argument expressions
1609 of elemental and array valued intrinsic procedures. Since this is
1610 called from procedure resolution functions, it only recurses at
1614 resolve_assumed_size_actual (gfc_expr
*e
)
1619 switch (e
->expr_type
)
1622 if (e
->symtree
&& check_assumed_size_reference (e
->symtree
->n
.sym
, e
))
1627 if (resolve_assumed_size_actual (e
->value
.op
.op1
)
1628 || resolve_assumed_size_actual (e
->value
.op
.op2
))
1639 /* Check a generic procedure, passed as an actual argument, to see if
1640 there is a matching specific name. If none, it is an error, and if
1641 more than one, the reference is ambiguous. */
1643 count_specific_procs (gfc_expr
*e
)
1650 sym
= e
->symtree
->n
.sym
;
1652 for (p
= sym
->generic
; p
; p
= p
->next
)
1653 if (strcmp (sym
->name
, p
->sym
->name
) == 0)
1655 e
->symtree
= gfc_find_symtree (p
->sym
->ns
->sym_root
,
1661 gfc_error ("%qs at %L is ambiguous", e
->symtree
->n
.sym
->name
,
1665 gfc_error ("GENERIC procedure %qs is not allowed as an actual "
1666 "argument at %L", sym
->name
, &e
->where
);
1672 /* See if a call to sym could possibly be a not allowed RECURSION because of
1673 a missing RECURSIVE declaration. This means that either sym is the current
1674 context itself, or sym is the parent of a contained procedure calling its
1675 non-RECURSIVE containing procedure.
1676 This also works if sym is an ENTRY. */
1679 is_illegal_recursion (gfc_symbol
* sym
, gfc_namespace
* context
)
1681 gfc_symbol
* proc_sym
;
1682 gfc_symbol
* context_proc
;
1683 gfc_namespace
* real_context
;
1685 if (sym
->attr
.flavor
== FL_PROGRAM
1686 || gfc_fl_struct (sym
->attr
.flavor
))
1689 /* If we've got an ENTRY, find real procedure. */
1690 if (sym
->attr
.entry
&& sym
->ns
->entries
)
1691 proc_sym
= sym
->ns
->entries
->sym
;
1695 /* If sym is RECURSIVE, all is well of course. */
1696 if (proc_sym
->attr
.recursive
|| flag_recursive
)
1699 /* Find the context procedure's "real" symbol if it has entries.
1700 We look for a procedure symbol, so recurse on the parents if we don't
1701 find one (like in case of a BLOCK construct). */
1702 for (real_context
= context
; ; real_context
= real_context
->parent
)
1704 /* We should find something, eventually! */
1705 gcc_assert (real_context
);
1707 context_proc
= (real_context
->entries
? real_context
->entries
->sym
1708 : real_context
->proc_name
);
1710 /* In some special cases, there may not be a proc_name, like for this
1712 real(bad_kind()) function foo () ...
1713 when checking the call to bad_kind ().
1714 In these cases, we simply return here and assume that the
1719 if (context_proc
->attr
.flavor
!= FL_LABEL
)
1723 /* A call from sym's body to itself is recursion, of course. */
1724 if (context_proc
== proc_sym
)
1727 /* The same is true if context is a contained procedure and sym the
1729 if (context_proc
->attr
.contained
)
1731 gfc_symbol
* parent_proc
;
1733 gcc_assert (context
->parent
);
1734 parent_proc
= (context
->parent
->entries
? context
->parent
->entries
->sym
1735 : context
->parent
->proc_name
);
1737 if (parent_proc
== proc_sym
)
1745 /* Resolve an intrinsic procedure: Set its function/subroutine attribute,
1746 its typespec and formal argument list. */
1749 gfc_resolve_intrinsic (gfc_symbol
*sym
, locus
*loc
)
1751 gfc_intrinsic_sym
* isym
= NULL
;
1757 /* Already resolved. */
1758 if (sym
->from_intmod
&& sym
->ts
.type
!= BT_UNKNOWN
)
1761 /* We already know this one is an intrinsic, so we don't call
1762 gfc_is_intrinsic for full checking but rather use gfc_find_function and
1763 gfc_find_subroutine directly to check whether it is a function or
1766 if (sym
->intmod_sym_id
&& sym
->attr
.subroutine
)
1768 gfc_isym_id id
= gfc_isym_id_by_intmod_sym (sym
);
1769 isym
= gfc_intrinsic_subroutine_by_id (id
);
1771 else if (sym
->intmod_sym_id
)
1773 gfc_isym_id id
= gfc_isym_id_by_intmod_sym (sym
);
1774 isym
= gfc_intrinsic_function_by_id (id
);
1776 else if (!sym
->attr
.subroutine
)
1777 isym
= gfc_find_function (sym
->name
);
1779 if (isym
&& !sym
->attr
.subroutine
)
1781 if (sym
->ts
.type
!= BT_UNKNOWN
&& warn_surprising
1782 && !sym
->attr
.implicit_type
)
1783 gfc_warning (OPT_Wsurprising
,
1784 "Type specified for intrinsic function %qs at %L is"
1785 " ignored", sym
->name
, &sym
->declared_at
);
1787 if (!sym
->attr
.function
&&
1788 !gfc_add_function(&sym
->attr
, sym
->name
, loc
))
1793 else if (isym
|| (isym
= gfc_find_subroutine (sym
->name
)))
1795 if (sym
->ts
.type
!= BT_UNKNOWN
&& !sym
->attr
.implicit_type
)
1797 gfc_error ("Intrinsic subroutine %qs at %L shall not have a type"
1798 " specifier", sym
->name
, &sym
->declared_at
);
1802 if (!sym
->attr
.subroutine
&&
1803 !gfc_add_subroutine(&sym
->attr
, sym
->name
, loc
))
1808 gfc_error ("%qs declared INTRINSIC at %L does not exist", sym
->name
,
1813 gfc_copy_formal_args_intr (sym
, isym
, NULL
);
1815 sym
->attr
.pure
= isym
->pure
;
1816 sym
->attr
.elemental
= isym
->elemental
;
1818 /* Check it is actually available in the standard settings. */
1819 if (!gfc_check_intrinsic_standard (isym
, &symstd
, false, sym
->declared_at
))
1821 gfc_error ("The intrinsic %qs declared INTRINSIC at %L is not "
1822 "available in the current standard settings but %s. Use "
1823 "an appropriate %<-std=*%> option or enable "
1824 "%<-fall-intrinsics%> in order to use it.",
1825 sym
->name
, &sym
->declared_at
, symstd
);
1833 /* Resolve a procedure expression, like passing it to a called procedure or as
1834 RHS for a procedure pointer assignment. */
1837 resolve_procedure_expression (gfc_expr
* expr
)
1841 if (expr
->expr_type
!= EXPR_VARIABLE
)
1843 gcc_assert (expr
->symtree
);
1845 sym
= expr
->symtree
->n
.sym
;
1847 if (sym
->attr
.intrinsic
)
1848 gfc_resolve_intrinsic (sym
, &expr
->where
);
1850 if (sym
->attr
.flavor
!= FL_PROCEDURE
1851 || (sym
->attr
.function
&& sym
->result
== sym
))
1854 /* A non-RECURSIVE procedure that is used as procedure expression within its
1855 own body is in danger of being called recursively. */
1856 if (is_illegal_recursion (sym
, gfc_current_ns
))
1857 gfc_warning (0, "Non-RECURSIVE procedure %qs at %L is possibly calling"
1858 " itself recursively. Declare it RECURSIVE or use"
1859 " %<-frecursive%>", sym
->name
, &expr
->where
);
1865 /* Resolve an actual argument list. Most of the time, this is just
1866 resolving the expressions in the list.
1867 The exception is that we sometimes have to decide whether arguments
1868 that look like procedure arguments are really simple variable
1872 resolve_actual_arglist (gfc_actual_arglist
*arg
, procedure_type ptype
,
1873 bool no_formal_args
)
1876 gfc_symtree
*parent_st
;
1878 gfc_component
*comp
;
1879 int save_need_full_assumed_size
;
1880 bool return_value
= false;
1881 bool actual_arg_sav
= actual_arg
, first_actual_arg_sav
= first_actual_arg
;
1884 first_actual_arg
= true;
1886 for (; arg
; arg
= arg
->next
)
1891 /* Check the label is a valid branching target. */
1894 if (arg
->label
->defined
== ST_LABEL_UNKNOWN
)
1896 gfc_error ("Label %d referenced at %L is never defined",
1897 arg
->label
->value
, &arg
->label
->where
);
1901 first_actual_arg
= false;
1905 if (e
->expr_type
== EXPR_VARIABLE
1906 && e
->symtree
->n
.sym
->attr
.generic
1908 && count_specific_procs (e
) != 1)
1911 if (e
->ts
.type
!= BT_PROCEDURE
)
1913 save_need_full_assumed_size
= need_full_assumed_size
;
1914 if (e
->expr_type
!= EXPR_VARIABLE
)
1915 need_full_assumed_size
= 0;
1916 if (!gfc_resolve_expr (e
))
1918 need_full_assumed_size
= save_need_full_assumed_size
;
1922 /* See if the expression node should really be a variable reference. */
1924 sym
= e
->symtree
->n
.sym
;
1926 if (sym
->attr
.flavor
== FL_PROCEDURE
1927 || sym
->attr
.intrinsic
1928 || sym
->attr
.external
)
1932 /* If a procedure is not already determined to be something else
1933 check if it is intrinsic. */
1934 if (gfc_is_intrinsic (sym
, sym
->attr
.subroutine
, e
->where
))
1935 sym
->attr
.intrinsic
= 1;
1937 if (sym
->attr
.proc
== PROC_ST_FUNCTION
)
1939 gfc_error ("Statement function %qs at %L is not allowed as an "
1940 "actual argument", sym
->name
, &e
->where
);
1943 actual_ok
= gfc_intrinsic_actual_ok (sym
->name
,
1944 sym
->attr
.subroutine
);
1945 if (sym
->attr
.intrinsic
&& actual_ok
== 0)
1947 gfc_error ("Intrinsic %qs at %L is not allowed as an "
1948 "actual argument", sym
->name
, &e
->where
);
1951 if (sym
->attr
.contained
&& !sym
->attr
.use_assoc
1952 && sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
)
1954 if (!gfc_notify_std (GFC_STD_F2008
, "Internal procedure %qs is"
1955 " used as actual argument at %L",
1956 sym
->name
, &e
->where
))
1960 if (sym
->attr
.elemental
&& !sym
->attr
.intrinsic
)
1962 gfc_error ("ELEMENTAL non-INTRINSIC procedure %qs is not "
1963 "allowed as an actual argument at %L", sym
->name
,
1967 /* Check if a generic interface has a specific procedure
1968 with the same name before emitting an error. */
1969 if (sym
->attr
.generic
&& count_specific_procs (e
) != 1)
1972 /* Just in case a specific was found for the expression. */
1973 sym
= e
->symtree
->n
.sym
;
1975 /* If the symbol is the function that names the current (or
1976 parent) scope, then we really have a variable reference. */
1978 if (gfc_is_function_return_value (sym
, sym
->ns
))
1981 /* If all else fails, see if we have a specific intrinsic. */
1982 if (sym
->ts
.type
== BT_UNKNOWN
&& sym
->attr
.intrinsic
)
1984 gfc_intrinsic_sym
*isym
;
1986 isym
= gfc_find_function (sym
->name
);
1987 if (isym
== NULL
|| !isym
->specific
)
1989 gfc_error ("Unable to find a specific INTRINSIC procedure "
1990 "for the reference %qs at %L", sym
->name
,
1995 sym
->attr
.intrinsic
= 1;
1996 sym
->attr
.function
= 1;
1999 if (!gfc_resolve_expr (e
))
2004 /* See if the name is a module procedure in a parent unit. */
2006 if (was_declared (sym
) || sym
->ns
->parent
== NULL
)
2009 if (gfc_find_sym_tree (sym
->name
, sym
->ns
->parent
, 1, &parent_st
))
2011 gfc_error ("Symbol %qs at %L is ambiguous", sym
->name
, &e
->where
);
2015 if (parent_st
== NULL
)
2018 sym
= parent_st
->n
.sym
;
2019 e
->symtree
= parent_st
; /* Point to the right thing. */
2021 if (sym
->attr
.flavor
== FL_PROCEDURE
2022 || sym
->attr
.intrinsic
2023 || sym
->attr
.external
)
2025 if (!gfc_resolve_expr (e
))
2031 e
->expr_type
= EXPR_VARIABLE
;
2033 if ((sym
->as
!= NULL
&& sym
->ts
.type
!= BT_CLASS
)
2034 || (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
2035 && CLASS_DATA (sym
)->as
))
2037 e
->rank
= sym
->ts
.type
== BT_CLASS
2038 ? CLASS_DATA (sym
)->as
->rank
: sym
->as
->rank
;
2039 e
->ref
= gfc_get_ref ();
2040 e
->ref
->type
= REF_ARRAY
;
2041 e
->ref
->u
.ar
.type
= AR_FULL
;
2042 e
->ref
->u
.ar
.as
= sym
->ts
.type
== BT_CLASS
2043 ? CLASS_DATA (sym
)->as
: sym
->as
;
2046 /* Expressions are assigned a default ts.type of BT_PROCEDURE in
2047 primary.c (match_actual_arg). If above code determines that it
2048 is a variable instead, it needs to be resolved as it was not
2049 done at the beginning of this function. */
2050 save_need_full_assumed_size
= need_full_assumed_size
;
2051 if (e
->expr_type
!= EXPR_VARIABLE
)
2052 need_full_assumed_size
= 0;
2053 if (!gfc_resolve_expr (e
))
2055 need_full_assumed_size
= save_need_full_assumed_size
;
2058 /* Check argument list functions %VAL, %LOC and %REF. There is
2059 nothing to do for %REF. */
2060 if (arg
->name
&& arg
->name
[0] == '%')
2062 if (strcmp ("%VAL", arg
->name
) == 0)
2064 if (e
->ts
.type
== BT_CHARACTER
|| e
->ts
.type
== BT_DERIVED
)
2066 gfc_error ("By-value argument at %L is not of numeric "
2073 gfc_error ("By-value argument at %L cannot be an array or "
2074 "an array section", &e
->where
);
2078 /* Intrinsics are still PROC_UNKNOWN here. However,
2079 since same file external procedures are not resolvable
2080 in gfortran, it is a good deal easier to leave them to
2082 if (ptype
!= PROC_UNKNOWN
2083 && ptype
!= PROC_DUMMY
2084 && ptype
!= PROC_EXTERNAL
2085 && ptype
!= PROC_MODULE
)
2087 gfc_error ("By-value argument at %L is not allowed "
2088 "in this context", &e
->where
);
2093 /* Statement functions have already been excluded above. */
2094 else if (strcmp ("%LOC", arg
->name
) == 0
2095 && e
->ts
.type
== BT_PROCEDURE
)
2097 if (e
->symtree
->n
.sym
->attr
.proc
== PROC_INTERNAL
)
2099 gfc_error ("Passing internal procedure at %L by location "
2100 "not allowed", &e
->where
);
2106 comp
= gfc_get_proc_ptr_comp(e
);
2107 if (e
->expr_type
== EXPR_VARIABLE
2108 && comp
&& comp
->attr
.elemental
)
2110 gfc_error ("ELEMENTAL procedure pointer component %qs is not "
2111 "allowed as an actual argument at %L", comp
->name
,
2115 /* Fortran 2008, C1237. */
2116 if (e
->expr_type
== EXPR_VARIABLE
&& gfc_is_coindexed (e
)
2117 && gfc_has_ultimate_pointer (e
))
2119 gfc_error ("Coindexed actual argument at %L with ultimate pointer "
2120 "component", &e
->where
);
2124 first_actual_arg
= false;
2127 return_value
= true;
2130 actual_arg
= actual_arg_sav
;
2131 first_actual_arg
= first_actual_arg_sav
;
2133 return return_value
;
2137 /* Do the checks of the actual argument list that are specific to elemental
2138 procedures. If called with c == NULL, we have a function, otherwise if
2139 expr == NULL, we have a subroutine. */
2142 resolve_elemental_actual (gfc_expr
*expr
, gfc_code
*c
)
2144 gfc_actual_arglist
*arg0
;
2145 gfc_actual_arglist
*arg
;
2146 gfc_symbol
*esym
= NULL
;
2147 gfc_intrinsic_sym
*isym
= NULL
;
2149 gfc_intrinsic_arg
*iformal
= NULL
;
2150 gfc_formal_arglist
*eformal
= NULL
;
2151 bool formal_optional
= false;
2152 bool set_by_optional
= false;
2156 /* Is this an elemental procedure? */
2157 if (expr
&& expr
->value
.function
.actual
!= NULL
)
2159 if (expr
->value
.function
.esym
!= NULL
2160 && expr
->value
.function
.esym
->attr
.elemental
)
2162 arg0
= expr
->value
.function
.actual
;
2163 esym
= expr
->value
.function
.esym
;
2165 else if (expr
->value
.function
.isym
!= NULL
2166 && expr
->value
.function
.isym
->elemental
)
2168 arg0
= expr
->value
.function
.actual
;
2169 isym
= expr
->value
.function
.isym
;
2174 else if (c
&& c
->ext
.actual
!= NULL
)
2176 arg0
= c
->ext
.actual
;
2178 if (c
->resolved_sym
)
2179 esym
= c
->resolved_sym
;
2181 esym
= c
->symtree
->n
.sym
;
2184 if (!esym
->attr
.elemental
)
2190 /* The rank of an elemental is the rank of its array argument(s). */
2191 for (arg
= arg0
; arg
; arg
= arg
->next
)
2193 if (arg
->expr
!= NULL
&& arg
->expr
->rank
!= 0)
2195 rank
= arg
->expr
->rank
;
2196 if (arg
->expr
->expr_type
== EXPR_VARIABLE
2197 && arg
->expr
->symtree
->n
.sym
->attr
.optional
)
2198 set_by_optional
= true;
2200 /* Function specific; set the result rank and shape. */
2204 if (!expr
->shape
&& arg
->expr
->shape
)
2206 expr
->shape
= gfc_get_shape (rank
);
2207 for (i
= 0; i
< rank
; i
++)
2208 mpz_init_set (expr
->shape
[i
], arg
->expr
->shape
[i
]);
2215 /* If it is an array, it shall not be supplied as an actual argument
2216 to an elemental procedure unless an array of the same rank is supplied
2217 as an actual argument corresponding to a nonoptional dummy argument of
2218 that elemental procedure(12.4.1.5). */
2219 formal_optional
= false;
2221 iformal
= isym
->formal
;
2223 eformal
= esym
->formal
;
2225 for (arg
= arg0
; arg
; arg
= arg
->next
)
2229 if (eformal
->sym
&& eformal
->sym
->attr
.optional
)
2230 formal_optional
= true;
2231 eformal
= eformal
->next
;
2233 else if (isym
&& iformal
)
2235 if (iformal
->optional
)
2236 formal_optional
= true;
2237 iformal
= iformal
->next
;
2240 formal_optional
= true;
2242 if (pedantic
&& arg
->expr
!= NULL
2243 && arg
->expr
->expr_type
== EXPR_VARIABLE
2244 && arg
->expr
->symtree
->n
.sym
->attr
.optional
2247 && (set_by_optional
|| arg
->expr
->rank
!= rank
)
2248 && !(isym
&& isym
->id
== GFC_ISYM_CONVERSION
))
2250 gfc_warning (OPT_Wpedantic
,
2251 "%qs at %L is an array and OPTIONAL; IF IT IS "
2252 "MISSING, it cannot be the actual argument of an "
2253 "ELEMENTAL procedure unless there is a non-optional "
2254 "argument with the same rank (12.4.1.5)",
2255 arg
->expr
->symtree
->n
.sym
->name
, &arg
->expr
->where
);
2259 for (arg
= arg0
; arg
; arg
= arg
->next
)
2261 if (arg
->expr
== NULL
|| arg
->expr
->rank
== 0)
2264 /* Being elemental, the last upper bound of an assumed size array
2265 argument must be present. */
2266 if (resolve_assumed_size_actual (arg
->expr
))
2269 /* Elemental procedure's array actual arguments must conform. */
2272 if (!gfc_check_conformance (arg
->expr
, e
, "elemental procedure"))
2279 /* INTENT(OUT) is only allowed for subroutines; if any actual argument
2280 is an array, the intent inout/out variable needs to be also an array. */
2281 if (rank
> 0 && esym
&& expr
== NULL
)
2282 for (eformal
= esym
->formal
, arg
= arg0
; arg
&& eformal
;
2283 arg
= arg
->next
, eformal
= eformal
->next
)
2284 if ((eformal
->sym
->attr
.intent
== INTENT_OUT
2285 || eformal
->sym
->attr
.intent
== INTENT_INOUT
)
2286 && arg
->expr
&& arg
->expr
->rank
== 0)
2288 gfc_error ("Actual argument at %L for INTENT(%s) dummy %qs of "
2289 "ELEMENTAL subroutine %qs is a scalar, but another "
2290 "actual argument is an array", &arg
->expr
->where
,
2291 (eformal
->sym
->attr
.intent
== INTENT_OUT
) ? "OUT"
2292 : "INOUT", eformal
->sym
->name
, esym
->name
);
2299 /* This function does the checking of references to global procedures
2300 as defined in sections 18.1 and 14.1, respectively, of the Fortran
2301 77 and 95 standards. It checks for a gsymbol for the name, making
2302 one if it does not already exist. If it already exists, then the
2303 reference being resolved must correspond to the type of gsymbol.
2304 Otherwise, the new symbol is equipped with the attributes of the
2305 reference. The corresponding code that is called in creating
2306 global entities is parse.c.
2308 In addition, for all but -std=legacy, the gsymbols are used to
2309 check the interfaces of external procedures from the same file.
2310 The namespace of the gsymbol is resolved and then, once this is
2311 done the interface is checked. */
2315 not_in_recursive (gfc_symbol
*sym
, gfc_namespace
*gsym_ns
)
2317 if (!gsym_ns
->proc_name
->attr
.recursive
)
2320 if (sym
->ns
== gsym_ns
)
2323 if (sym
->ns
->parent
&& sym
->ns
->parent
== gsym_ns
)
2330 not_entry_self_reference (gfc_symbol
*sym
, gfc_namespace
*gsym_ns
)
2332 if (gsym_ns
->entries
)
2334 gfc_entry_list
*entry
= gsym_ns
->entries
;
2336 for (; entry
; entry
= entry
->next
)
2338 if (strcmp (sym
->name
, entry
->sym
->name
) == 0)
2340 if (strcmp (gsym_ns
->proc_name
->name
,
2341 sym
->ns
->proc_name
->name
) == 0)
2345 && strcmp (gsym_ns
->proc_name
->name
,
2346 sym
->ns
->parent
->proc_name
->name
) == 0)
2355 /* Check for the requirement of an explicit interface. F08:12.4.2.2. */
2358 gfc_explicit_interface_required (gfc_symbol
*sym
, char *errmsg
, int err_len
)
2360 gfc_formal_arglist
*arg
= gfc_sym_get_dummy_args (sym
);
2362 for ( ; arg
; arg
= arg
->next
)
2367 if (arg
->sym
->attr
.allocatable
) /* (2a) */
2369 strncpy (errmsg
, _("allocatable argument"), err_len
);
2372 else if (arg
->sym
->attr
.asynchronous
)
2374 strncpy (errmsg
, _("asynchronous argument"), err_len
);
2377 else if (arg
->sym
->attr
.optional
)
2379 strncpy (errmsg
, _("optional argument"), err_len
);
2382 else if (arg
->sym
->attr
.pointer
)
2384 strncpy (errmsg
, _("pointer argument"), err_len
);
2387 else if (arg
->sym
->attr
.target
)
2389 strncpy (errmsg
, _("target argument"), err_len
);
2392 else if (arg
->sym
->attr
.value
)
2394 strncpy (errmsg
, _("value argument"), err_len
);
2397 else if (arg
->sym
->attr
.volatile_
)
2399 strncpy (errmsg
, _("volatile argument"), err_len
);
2402 else if (arg
->sym
->as
&& arg
->sym
->as
->type
== AS_ASSUMED_SHAPE
) /* (2b) */
2404 strncpy (errmsg
, _("assumed-shape argument"), err_len
);
2407 else if (arg
->sym
->as
&& arg
->sym
->as
->type
== AS_ASSUMED_RANK
) /* TS 29113, 6.2. */
2409 strncpy (errmsg
, _("assumed-rank argument"), err_len
);
2412 else if (arg
->sym
->attr
.codimension
) /* (2c) */
2414 strncpy (errmsg
, _("coarray argument"), err_len
);
2417 else if (false) /* (2d) TODO: parametrized derived type */
2419 strncpy (errmsg
, _("parametrized derived type argument"), err_len
);
2422 else if (arg
->sym
->ts
.type
== BT_CLASS
) /* (2e) */
2424 strncpy (errmsg
, _("polymorphic argument"), err_len
);
2427 else if (arg
->sym
->attr
.ext_attr
& (1 << EXT_ATTR_NO_ARG_CHECK
))
2429 strncpy (errmsg
, _("NO_ARG_CHECK attribute"), err_len
);
2432 else if (arg
->sym
->ts
.type
== BT_ASSUMED
)
2434 /* As assumed-type is unlimited polymorphic (cf. above).
2435 See also TS 29113, Note 6.1. */
2436 strncpy (errmsg
, _("assumed-type argument"), err_len
);
2441 if (sym
->attr
.function
)
2443 gfc_symbol
*res
= sym
->result
? sym
->result
: sym
;
2445 if (res
->attr
.dimension
) /* (3a) */
2447 strncpy (errmsg
, _("array result"), err_len
);
2450 else if (res
->attr
.pointer
|| res
->attr
.allocatable
) /* (3b) */
2452 strncpy (errmsg
, _("pointer or allocatable result"), err_len
);
2455 else if (res
->ts
.type
== BT_CHARACTER
&& res
->ts
.u
.cl
2456 && res
->ts
.u
.cl
->length
2457 && res
->ts
.u
.cl
->length
->expr_type
!= EXPR_CONSTANT
) /* (3c) */
2459 strncpy (errmsg
, _("result with non-constant character length"), err_len
);
2464 if (sym
->attr
.elemental
&& !sym
->attr
.intrinsic
) /* (4) */
2466 strncpy (errmsg
, _("elemental procedure"), err_len
);
2469 else if (sym
->attr
.is_bind_c
) /* (5) */
2471 strncpy (errmsg
, _("bind(c) procedure"), err_len
);
2480 resolve_global_procedure (gfc_symbol
*sym
, locus
*where
,
2481 gfc_actual_arglist
**actual
, int sub
)
2485 enum gfc_symbol_type type
;
2488 type
= sub
? GSYM_SUBROUTINE
: GSYM_FUNCTION
;
2490 gsym
= gfc_get_gsymbol (sym
->binding_label
? sym
->binding_label
: sym
->name
);
2492 if ((gsym
->type
!= GSYM_UNKNOWN
&& gsym
->type
!= type
))
2493 gfc_global_used (gsym
, where
);
2495 if ((sym
->attr
.if_source
== IFSRC_UNKNOWN
2496 || sym
->attr
.if_source
== IFSRC_IFBODY
)
2497 && gsym
->type
!= GSYM_UNKNOWN
2498 && !gsym
->binding_label
2500 && gsym
->ns
->resolved
!= -1
2501 && gsym
->ns
->proc_name
2502 && not_in_recursive (sym
, gsym
->ns
)
2503 && not_entry_self_reference (sym
, gsym
->ns
))
2505 gfc_symbol
*def_sym
;
2507 /* Resolve the gsymbol namespace if needed. */
2508 if (!gsym
->ns
->resolved
)
2510 gfc_symbol
*old_dt_list
;
2512 /* Stash away derived types so that the backend_decls do not
2514 old_dt_list
= gfc_derived_types
;
2515 gfc_derived_types
= NULL
;
2517 gfc_resolve (gsym
->ns
);
2519 /* Store the new derived types with the global namespace. */
2520 if (gfc_derived_types
)
2521 gsym
->ns
->derived_types
= gfc_derived_types
;
2523 /* Restore the derived types of this namespace. */
2524 gfc_derived_types
= old_dt_list
;
2527 /* Make sure that translation for the gsymbol occurs before
2528 the procedure currently being resolved. */
2529 ns
= gfc_global_ns_list
;
2530 for (; ns
&& ns
!= gsym
->ns
; ns
= ns
->sibling
)
2532 if (ns
->sibling
== gsym
->ns
)
2534 ns
->sibling
= gsym
->ns
->sibling
;
2535 gsym
->ns
->sibling
= gfc_global_ns_list
;
2536 gfc_global_ns_list
= gsym
->ns
;
2541 def_sym
= gsym
->ns
->proc_name
;
2543 /* This can happen if a binding name has been specified. */
2544 if (gsym
->binding_label
&& gsym
->sym_name
!= def_sym
->name
)
2545 gfc_find_symbol (gsym
->sym_name
, gsym
->ns
, 0, &def_sym
);
2547 if (def_sym
->attr
.entry_master
)
2549 gfc_entry_list
*entry
;
2550 for (entry
= gsym
->ns
->entries
; entry
; entry
= entry
->next
)
2551 if (strcmp (entry
->sym
->name
, sym
->name
) == 0)
2553 def_sym
= entry
->sym
;
2558 if (sym
->attr
.function
&& !gfc_compare_types (&sym
->ts
, &def_sym
->ts
))
2560 gfc_error ("Return type mismatch of function %qs at %L (%s/%s)",
2561 sym
->name
, &sym
->declared_at
, gfc_typename (&sym
->ts
),
2562 gfc_typename (&def_sym
->ts
));
2566 if (sym
->attr
.if_source
== IFSRC_UNKNOWN
2567 && gfc_explicit_interface_required (def_sym
, reason
, sizeof(reason
)))
2569 gfc_error ("Explicit interface required for %qs at %L: %s",
2570 sym
->name
, &sym
->declared_at
, reason
);
2574 if (!pedantic
&& (gfc_option
.allow_std
& GFC_STD_GNU
))
2575 /* Turn erros into warnings with -std=gnu and -std=legacy. */
2576 gfc_errors_to_warnings (true);
2578 if (!gfc_compare_interfaces (sym
, def_sym
, sym
->name
, 0, 1,
2579 reason
, sizeof(reason
), NULL
, NULL
))
2581 gfc_error_opt (OPT_Wargument_mismatch
,
2582 "Interface mismatch in global procedure %qs at %L:"
2583 " %s", sym
->name
, &sym
->declared_at
, reason
);
2588 || ((gfc_option
.warn_std
& GFC_STD_LEGACY
)
2589 && !(gfc_option
.warn_std
& GFC_STD_GNU
)))
2590 gfc_errors_to_warnings (true);
2592 if (sym
->attr
.if_source
!= IFSRC_IFBODY
)
2593 gfc_procedure_use (def_sym
, actual
, where
);
2597 gfc_errors_to_warnings (false);
2599 if (gsym
->type
== GSYM_UNKNOWN
)
2602 gsym
->where
= *where
;
2609 /************* Function resolution *************/
2611 /* Resolve a function call known to be generic.
2612 Section 14.1.2.4.1. */
2615 resolve_generic_f0 (gfc_expr
*expr
, gfc_symbol
*sym
)
2619 if (sym
->attr
.generic
)
2621 s
= gfc_search_interface (sym
->generic
, 0, &expr
->value
.function
.actual
);
2624 expr
->value
.function
.name
= s
->name
;
2625 expr
->value
.function
.esym
= s
;
2627 if (s
->ts
.type
!= BT_UNKNOWN
)
2629 else if (s
->result
!= NULL
&& s
->result
->ts
.type
!= BT_UNKNOWN
)
2630 expr
->ts
= s
->result
->ts
;
2633 expr
->rank
= s
->as
->rank
;
2634 else if (s
->result
!= NULL
&& s
->result
->as
!= NULL
)
2635 expr
->rank
= s
->result
->as
->rank
;
2637 gfc_set_sym_referenced (expr
->value
.function
.esym
);
2642 /* TODO: Need to search for elemental references in generic
2646 if (sym
->attr
.intrinsic
)
2647 return gfc_intrinsic_func_interface (expr
, 0);
2654 resolve_generic_f (gfc_expr
*expr
)
2658 gfc_interface
*intr
= NULL
;
2660 sym
= expr
->symtree
->n
.sym
;
2664 m
= resolve_generic_f0 (expr
, sym
);
2667 else if (m
== MATCH_ERROR
)
2672 for (intr
= sym
->generic
; intr
; intr
= intr
->next
)
2673 if (gfc_fl_struct (intr
->sym
->attr
.flavor
))
2676 if (sym
->ns
->parent
== NULL
)
2678 gfc_find_symbol (sym
->name
, sym
->ns
->parent
, 1, &sym
);
2682 if (!generic_sym (sym
))
2686 /* Last ditch attempt. See if the reference is to an intrinsic
2687 that possesses a matching interface. 14.1.2.4 */
2688 if (sym
&& !intr
&& !gfc_is_intrinsic (sym
, 0, expr
->where
))
2690 if (gfc_init_expr_flag
)
2691 gfc_error ("Function %qs in initialization expression at %L "
2692 "must be an intrinsic function",
2693 expr
->symtree
->n
.sym
->name
, &expr
->where
);
2695 gfc_error ("There is no specific function for the generic %qs "
2696 "at %L", expr
->symtree
->n
.sym
->name
, &expr
->where
);
2702 if (!gfc_convert_to_structure_constructor (expr
, intr
->sym
, NULL
,
2705 if (!gfc_use_derived (expr
->ts
.u
.derived
))
2707 return resolve_structure_cons (expr
, 0);
2710 m
= gfc_intrinsic_func_interface (expr
, 0);
2715 gfc_error ("Generic function %qs at %L is not consistent with a "
2716 "specific intrinsic interface", expr
->symtree
->n
.sym
->name
,
2723 /* Resolve a function call known to be specific. */
2726 resolve_specific_f0 (gfc_symbol
*sym
, gfc_expr
*expr
)
2730 if (sym
->attr
.external
|| sym
->attr
.if_source
== IFSRC_IFBODY
)
2732 if (sym
->attr
.dummy
)
2734 sym
->attr
.proc
= PROC_DUMMY
;
2738 sym
->attr
.proc
= PROC_EXTERNAL
;
2742 if (sym
->attr
.proc
== PROC_MODULE
2743 || sym
->attr
.proc
== PROC_ST_FUNCTION
2744 || sym
->attr
.proc
== PROC_INTERNAL
)
2747 if (sym
->attr
.intrinsic
)
2749 m
= gfc_intrinsic_func_interface (expr
, 1);
2753 gfc_error ("Function %qs at %L is INTRINSIC but is not compatible "
2754 "with an intrinsic", sym
->name
, &expr
->where
);
2762 gfc_procedure_use (sym
, &expr
->value
.function
.actual
, &expr
->where
);
2765 expr
->ts
= sym
->result
->ts
;
2768 expr
->value
.function
.name
= sym
->name
;
2769 expr
->value
.function
.esym
= sym
;
2770 /* Prevent crash when sym->ts.u.derived->components is not set due to previous
2772 if (sym
->ts
.type
== BT_CLASS
&& !CLASS_DATA (sym
))
2774 if (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
)->as
)
2775 expr
->rank
= CLASS_DATA (sym
)->as
->rank
;
2776 else if (sym
->as
!= NULL
)
2777 expr
->rank
= sym
->as
->rank
;
2784 resolve_specific_f (gfc_expr
*expr
)
2789 sym
= expr
->symtree
->n
.sym
;
2793 m
= resolve_specific_f0 (sym
, expr
);
2796 if (m
== MATCH_ERROR
)
2799 if (sym
->ns
->parent
== NULL
)
2802 gfc_find_symbol (sym
->name
, sym
->ns
->parent
, 1, &sym
);
2808 gfc_error ("Unable to resolve the specific function %qs at %L",
2809 expr
->symtree
->n
.sym
->name
, &expr
->where
);
2814 /* Recursively append candidate SYM to CANDIDATES. Store the number of
2815 candidates in CANDIDATES_LEN. */
2818 lookup_function_fuzzy_find_candidates (gfc_symtree
*sym
,
2820 size_t &candidates_len
)
2826 if ((sym
->n
.sym
->ts
.type
!= BT_UNKNOWN
|| sym
->n
.sym
->attr
.external
)
2827 && sym
->n
.sym
->attr
.flavor
== FL_PROCEDURE
)
2828 vec_push (candidates
, candidates_len
, sym
->name
);
2832 lookup_function_fuzzy_find_candidates (p
, candidates
, candidates_len
);
2836 lookup_function_fuzzy_find_candidates (p
, candidates
, candidates_len
);
2840 /* Lookup function FN fuzzily, taking names in SYMROOT into account. */
2843 gfc_lookup_function_fuzzy (const char *fn
, gfc_symtree
*symroot
)
2845 char **candidates
= NULL
;
2846 size_t candidates_len
= 0;
2847 lookup_function_fuzzy_find_candidates (symroot
, candidates
, candidates_len
);
2848 return gfc_closest_fuzzy_match (fn
, candidates
);
2852 /* Resolve a procedure call not known to be generic nor specific. */
2855 resolve_unknown_f (gfc_expr
*expr
)
2860 sym
= expr
->symtree
->n
.sym
;
2862 if (sym
->attr
.dummy
)
2864 sym
->attr
.proc
= PROC_DUMMY
;
2865 expr
->value
.function
.name
= sym
->name
;
2869 /* See if we have an intrinsic function reference. */
2871 if (gfc_is_intrinsic (sym
, 0, expr
->where
))
2873 if (gfc_intrinsic_func_interface (expr
, 1) == MATCH_YES
)
2878 /* The reference is to an external name. */
2880 sym
->attr
.proc
= PROC_EXTERNAL
;
2881 expr
->value
.function
.name
= sym
->name
;
2882 expr
->value
.function
.esym
= expr
->symtree
->n
.sym
;
2884 if (sym
->as
!= NULL
)
2885 expr
->rank
= sym
->as
->rank
;
2887 /* Type of the expression is either the type of the symbol or the
2888 default type of the symbol. */
2891 gfc_procedure_use (sym
, &expr
->value
.function
.actual
, &expr
->where
);
2893 if (sym
->ts
.type
!= BT_UNKNOWN
)
2897 ts
= gfc_get_default_type (sym
->name
, sym
->ns
);
2899 if (ts
->type
== BT_UNKNOWN
)
2902 = gfc_lookup_function_fuzzy (sym
->name
, sym
->ns
->sym_root
);
2904 gfc_error ("Function %qs at %L has no IMPLICIT type"
2905 "; did you mean %qs?",
2906 sym
->name
, &expr
->where
, guessed
);
2908 gfc_error ("Function %qs at %L has no IMPLICIT type",
2909 sym
->name
, &expr
->where
);
2920 /* Return true, if the symbol is an external procedure. */
2922 is_external_proc (gfc_symbol
*sym
)
2924 if (!sym
->attr
.dummy
&& !sym
->attr
.contained
2925 && !gfc_is_intrinsic (sym
, sym
->attr
.subroutine
, sym
->declared_at
)
2926 && sym
->attr
.proc
!= PROC_ST_FUNCTION
2927 && !sym
->attr
.proc_pointer
2928 && !sym
->attr
.use_assoc
2936 /* Figure out if a function reference is pure or not. Also set the name
2937 of the function for a potential error message. Return nonzero if the
2938 function is PURE, zero if not. */
2940 pure_stmt_function (gfc_expr
*, gfc_symbol
*);
2943 gfc_pure_function (gfc_expr
*e
, const char **name
)
2946 gfc_component
*comp
;
2950 if (e
->symtree
!= NULL
2951 && e
->symtree
->n
.sym
!= NULL
2952 && e
->symtree
->n
.sym
->attr
.proc
== PROC_ST_FUNCTION
)
2953 return pure_stmt_function (e
, e
->symtree
->n
.sym
);
2955 comp
= gfc_get_proc_ptr_comp (e
);
2958 pure
= gfc_pure (comp
->ts
.interface
);
2961 else if (e
->value
.function
.esym
)
2963 pure
= gfc_pure (e
->value
.function
.esym
);
2964 *name
= e
->value
.function
.esym
->name
;
2966 else if (e
->value
.function
.isym
)
2968 pure
= e
->value
.function
.isym
->pure
2969 || e
->value
.function
.isym
->elemental
;
2970 *name
= e
->value
.function
.isym
->name
;
2974 /* Implicit functions are not pure. */
2976 *name
= e
->value
.function
.name
;
2983 /* Check if the expression is a reference to an implicitly pure function. */
2986 gfc_implicit_pure_function (gfc_expr
*e
)
2988 gfc_component
*comp
= gfc_get_proc_ptr_comp (e
);
2990 return gfc_implicit_pure (comp
->ts
.interface
);
2991 else if (e
->value
.function
.esym
)
2992 return gfc_implicit_pure (e
->value
.function
.esym
);
2999 impure_stmt_fcn (gfc_expr
*e
, gfc_symbol
*sym
,
3000 int *f ATTRIBUTE_UNUSED
)
3004 /* Don't bother recursing into other statement functions
3005 since they will be checked individually for purity. */
3006 if (e
->expr_type
!= EXPR_FUNCTION
3008 || e
->symtree
->n
.sym
== sym
3009 || e
->symtree
->n
.sym
->attr
.proc
== PROC_ST_FUNCTION
)
3012 return gfc_pure_function (e
, &name
) ? false : true;
3017 pure_stmt_function (gfc_expr
*e
, gfc_symbol
*sym
)
3019 return gfc_traverse_expr (e
, sym
, impure_stmt_fcn
, 0) ? 0 : 1;
3023 /* Check if an impure function is allowed in the current context. */
3025 static bool check_pure_function (gfc_expr
*e
)
3027 const char *name
= NULL
;
3028 if (!gfc_pure_function (e
, &name
) && name
)
3032 gfc_error ("Reference to impure function %qs at %L inside a "
3033 "FORALL %s", name
, &e
->where
,
3034 forall_flag
== 2 ? "mask" : "block");
3037 else if (gfc_do_concurrent_flag
)
3039 gfc_error ("Reference to impure function %qs at %L inside a "
3040 "DO CONCURRENT %s", name
, &e
->where
,
3041 gfc_do_concurrent_flag
== 2 ? "mask" : "block");
3044 else if (gfc_pure (NULL
))
3046 gfc_error ("Reference to impure function %qs at %L "
3047 "within a PURE procedure", name
, &e
->where
);
3050 if (!gfc_implicit_pure_function (e
))
3051 gfc_unset_implicit_pure (NULL
);
3057 /* Update current procedure's array_outer_dependency flag, considering
3058 a call to procedure SYM. */
3061 update_current_proc_array_outer_dependency (gfc_symbol
*sym
)
3063 /* Check to see if this is a sibling function that has not yet
3065 gfc_namespace
*sibling
= gfc_current_ns
->sibling
;
3066 for (; sibling
; sibling
= sibling
->sibling
)
3068 if (sibling
->proc_name
== sym
)
3070 gfc_resolve (sibling
);
3075 /* If SYM has references to outer arrays, so has the procedure calling
3076 SYM. If SYM is a procedure pointer, we can assume the worst. */
3077 if ((sym
->attr
.array_outer_dependency
|| sym
->attr
.proc_pointer
)
3078 && gfc_current_ns
->proc_name
)
3079 gfc_current_ns
->proc_name
->attr
.array_outer_dependency
= 1;
3083 /* Resolve a function call, which means resolving the arguments, then figuring
3084 out which entity the name refers to. */
3087 resolve_function (gfc_expr
*expr
)
3089 gfc_actual_arglist
*arg
;
3093 procedure_type p
= PROC_INTRINSIC
;
3094 bool no_formal_args
;
3098 sym
= expr
->symtree
->n
.sym
;
3100 /* If this is a procedure pointer component, it has already been resolved. */
3101 if (gfc_is_proc_ptr_comp (expr
))
3104 /* Avoid re-resolving the arguments of caf_get, which can lead to inserting
3106 if (sym
&& sym
->attr
.intrinsic
3107 && (sym
->intmod_sym_id
== GFC_ISYM_CAF_GET
3108 || sym
->intmod_sym_id
== GFC_ISYM_CAF_SEND
))
3111 if (sym
&& sym
->attr
.intrinsic
3112 && !gfc_resolve_intrinsic (sym
, &expr
->where
))
3115 if (sym
&& (sym
->attr
.flavor
== FL_VARIABLE
|| sym
->attr
.subroutine
))
3117 gfc_error ("%qs at %L is not a function", sym
->name
, &expr
->where
);
3121 /* If this is a deferred TBP with an abstract interface (which may
3122 of course be referenced), expr->value.function.esym will be set. */
3123 if (sym
&& sym
->attr
.abstract
&& !expr
->value
.function
.esym
)
3125 gfc_error ("ABSTRACT INTERFACE %qs must not be referenced at %L",
3126 sym
->name
, &expr
->where
);
3130 /* If this is a deferred TBP with an abstract interface, its result
3131 cannot be an assumed length character (F2003: C418). */
3132 if (sym
&& sym
->attr
.abstract
&& sym
->attr
.function
3133 && sym
->result
->ts
.u
.cl
3134 && sym
->result
->ts
.u
.cl
->length
== NULL
3135 && !sym
->result
->ts
.deferred
)
3137 gfc_error ("ABSTRACT INTERFACE %qs at %L must not have an assumed "
3138 "character length result (F2008: C418)", sym
->name
,
3143 /* Switch off assumed size checking and do this again for certain kinds
3144 of procedure, once the procedure itself is resolved. */
3145 need_full_assumed_size
++;
3147 if (expr
->symtree
&& expr
->symtree
->n
.sym
)
3148 p
= expr
->symtree
->n
.sym
->attr
.proc
;
3150 if (expr
->value
.function
.isym
&& expr
->value
.function
.isym
->inquiry
)
3151 inquiry_argument
= true;
3152 no_formal_args
= sym
&& is_external_proc (sym
)
3153 && gfc_sym_get_dummy_args (sym
) == NULL
;
3155 if (!resolve_actual_arglist (expr
->value
.function
.actual
,
3158 inquiry_argument
= false;
3162 inquiry_argument
= false;
3164 /* Resume assumed_size checking. */
3165 need_full_assumed_size
--;
3167 /* If the procedure is external, check for usage. */
3168 if (sym
&& is_external_proc (sym
))
3169 resolve_global_procedure (sym
, &expr
->where
,
3170 &expr
->value
.function
.actual
, 0);
3172 if (sym
&& sym
->ts
.type
== BT_CHARACTER
3174 && sym
->ts
.u
.cl
->length
== NULL
3176 && !sym
->ts
.deferred
3177 && expr
->value
.function
.esym
== NULL
3178 && !sym
->attr
.contained
)
3180 /* Internal procedures are taken care of in resolve_contained_fntype. */
3181 gfc_error ("Function %qs is declared CHARACTER(*) and cannot "
3182 "be used at %L since it is not a dummy argument",
3183 sym
->name
, &expr
->where
);
3187 /* See if function is already resolved. */
3189 if (expr
->value
.function
.name
!= NULL
3190 || expr
->value
.function
.isym
!= NULL
)
3192 if (expr
->ts
.type
== BT_UNKNOWN
)
3198 /* Apply the rules of section 14.1.2. */
3200 switch (procedure_kind (sym
))
3203 t
= resolve_generic_f (expr
);
3206 case PTYPE_SPECIFIC
:
3207 t
= resolve_specific_f (expr
);
3211 t
= resolve_unknown_f (expr
);
3215 gfc_internal_error ("resolve_function(): bad function type");
3219 /* If the expression is still a function (it might have simplified),
3220 then we check to see if we are calling an elemental function. */
3222 if (expr
->expr_type
!= EXPR_FUNCTION
)
3225 temp
= need_full_assumed_size
;
3226 need_full_assumed_size
= 0;
3228 if (!resolve_elemental_actual (expr
, NULL
))
3231 if (omp_workshare_flag
3232 && expr
->value
.function
.esym
3233 && ! gfc_elemental (expr
->value
.function
.esym
))
3235 gfc_error ("User defined non-ELEMENTAL function %qs at %L not allowed "
3236 "in WORKSHARE construct", expr
->value
.function
.esym
->name
,
3241 #define GENERIC_ID expr->value.function.isym->id
3242 else if (expr
->value
.function
.actual
!= NULL
3243 && expr
->value
.function
.isym
!= NULL
3244 && GENERIC_ID
!= GFC_ISYM_LBOUND
3245 && GENERIC_ID
!= GFC_ISYM_LCOBOUND
3246 && GENERIC_ID
!= GFC_ISYM_UCOBOUND
3247 && GENERIC_ID
!= GFC_ISYM_LEN
3248 && GENERIC_ID
!= GFC_ISYM_LOC
3249 && GENERIC_ID
!= GFC_ISYM_C_LOC
3250 && GENERIC_ID
!= GFC_ISYM_PRESENT
)
3252 /* Array intrinsics must also have the last upper bound of an
3253 assumed size array argument. UBOUND and SIZE have to be
3254 excluded from the check if the second argument is anything
3257 for (arg
= expr
->value
.function
.actual
; arg
; arg
= arg
->next
)
3259 if ((GENERIC_ID
== GFC_ISYM_UBOUND
|| GENERIC_ID
== GFC_ISYM_SIZE
)
3260 && arg
== expr
->value
.function
.actual
3261 && arg
->next
!= NULL
&& arg
->next
->expr
)
3263 if (arg
->next
->expr
->expr_type
!= EXPR_CONSTANT
)
3266 if (arg
->next
->name
&& strcmp (arg
->next
->name
, "kind") == 0)
3269 if ((int)mpz_get_si (arg
->next
->expr
->value
.integer
)
3274 if (arg
->expr
!= NULL
3275 && arg
->expr
->rank
> 0
3276 && resolve_assumed_size_actual (arg
->expr
))
3282 need_full_assumed_size
= temp
;
3284 if (!check_pure_function(expr
))
3287 /* Functions without the RECURSIVE attribution are not allowed to
3288 * call themselves. */
3289 if (expr
->value
.function
.esym
&& !expr
->value
.function
.esym
->attr
.recursive
)
3292 esym
= expr
->value
.function
.esym
;
3294 if (is_illegal_recursion (esym
, gfc_current_ns
))
3296 if (esym
->attr
.entry
&& esym
->ns
->entries
)
3297 gfc_error ("ENTRY %qs at %L cannot be called recursively, as"
3298 " function %qs is not RECURSIVE",
3299 esym
->name
, &expr
->where
, esym
->ns
->entries
->sym
->name
);
3301 gfc_error ("Function %qs at %L cannot be called recursively, as it"
3302 " is not RECURSIVE", esym
->name
, &expr
->where
);
3308 /* Character lengths of use associated functions may contains references to
3309 symbols not referenced from the current program unit otherwise. Make sure
3310 those symbols are marked as referenced. */
3312 if (expr
->ts
.type
== BT_CHARACTER
&& expr
->value
.function
.esym
3313 && expr
->value
.function
.esym
->attr
.use_assoc
)
3315 gfc_expr_set_symbols_referenced (expr
->ts
.u
.cl
->length
);
3318 /* Make sure that the expression has a typespec that works. */
3319 if (expr
->ts
.type
== BT_UNKNOWN
)
3321 if (expr
->symtree
->n
.sym
->result
3322 && expr
->symtree
->n
.sym
->result
->ts
.type
!= BT_UNKNOWN
3323 && !expr
->symtree
->n
.sym
->result
->attr
.proc_pointer
)
3324 expr
->ts
= expr
->symtree
->n
.sym
->result
->ts
;
3327 if (!expr
->ref
&& !expr
->value
.function
.isym
)
3329 if (expr
->value
.function
.esym
)
3330 update_current_proc_array_outer_dependency (expr
->value
.function
.esym
);
3332 update_current_proc_array_outer_dependency (sym
);
3335 /* typebound procedure: Assume the worst. */
3336 gfc_current_ns
->proc_name
->attr
.array_outer_dependency
= 1;
3342 /************* Subroutine resolution *************/
3345 pure_subroutine (gfc_symbol
*sym
, const char *name
, locus
*loc
)
3352 gfc_error ("Subroutine call to %qs in FORALL block at %L is not PURE",
3356 else if (gfc_do_concurrent_flag
)
3358 gfc_error ("Subroutine call to %qs in DO CONCURRENT block at %L is not "
3362 else if (gfc_pure (NULL
))
3364 gfc_error ("Subroutine call to %qs at %L is not PURE", name
, loc
);
3368 gfc_unset_implicit_pure (NULL
);
3374 resolve_generic_s0 (gfc_code
*c
, gfc_symbol
*sym
)
3378 if (sym
->attr
.generic
)
3380 s
= gfc_search_interface (sym
->generic
, 1, &c
->ext
.actual
);
3383 c
->resolved_sym
= s
;
3384 if (!pure_subroutine (s
, s
->name
, &c
->loc
))
3389 /* TODO: Need to search for elemental references in generic interface. */
3392 if (sym
->attr
.intrinsic
)
3393 return gfc_intrinsic_sub_interface (c
, 0);
3400 resolve_generic_s (gfc_code
*c
)
3405 sym
= c
->symtree
->n
.sym
;
3409 m
= resolve_generic_s0 (c
, sym
);
3412 else if (m
== MATCH_ERROR
)
3416 if (sym
->ns
->parent
== NULL
)
3418 gfc_find_symbol (sym
->name
, sym
->ns
->parent
, 1, &sym
);
3422 if (!generic_sym (sym
))
3426 /* Last ditch attempt. See if the reference is to an intrinsic
3427 that possesses a matching interface. 14.1.2.4 */
3428 sym
= c
->symtree
->n
.sym
;
3430 if (!gfc_is_intrinsic (sym
, 1, c
->loc
))
3432 gfc_error ("There is no specific subroutine for the generic %qs at %L",
3433 sym
->name
, &c
->loc
);
3437 m
= gfc_intrinsic_sub_interface (c
, 0);
3441 gfc_error ("Generic subroutine %qs at %L is not consistent with an "
3442 "intrinsic subroutine interface", sym
->name
, &c
->loc
);
3448 /* Resolve a subroutine call known to be specific. */
3451 resolve_specific_s0 (gfc_code
*c
, gfc_symbol
*sym
)
3455 if (sym
->attr
.external
|| sym
->attr
.if_source
== IFSRC_IFBODY
)
3457 if (sym
->attr
.dummy
)
3459 sym
->attr
.proc
= PROC_DUMMY
;
3463 sym
->attr
.proc
= PROC_EXTERNAL
;
3467 if (sym
->attr
.proc
== PROC_MODULE
|| sym
->attr
.proc
== PROC_INTERNAL
)
3470 if (sym
->attr
.intrinsic
)
3472 m
= gfc_intrinsic_sub_interface (c
, 1);
3476 gfc_error ("Subroutine %qs at %L is INTRINSIC but is not compatible "
3477 "with an intrinsic", sym
->name
, &c
->loc
);
3485 gfc_procedure_use (sym
, &c
->ext
.actual
, &c
->loc
);
3487 c
->resolved_sym
= sym
;
3488 if (!pure_subroutine (sym
, sym
->name
, &c
->loc
))
3496 resolve_specific_s (gfc_code
*c
)
3501 sym
= c
->symtree
->n
.sym
;
3505 m
= resolve_specific_s0 (c
, sym
);
3508 if (m
== MATCH_ERROR
)
3511 if (sym
->ns
->parent
== NULL
)
3514 gfc_find_symbol (sym
->name
, sym
->ns
->parent
, 1, &sym
);
3520 sym
= c
->symtree
->n
.sym
;
3521 gfc_error ("Unable to resolve the specific subroutine %qs at %L",
3522 sym
->name
, &c
->loc
);
3528 /* Resolve a subroutine call not known to be generic nor specific. */
3531 resolve_unknown_s (gfc_code
*c
)
3535 sym
= c
->symtree
->n
.sym
;
3537 if (sym
->attr
.dummy
)
3539 sym
->attr
.proc
= PROC_DUMMY
;
3543 /* See if we have an intrinsic function reference. */
3545 if (gfc_is_intrinsic (sym
, 1, c
->loc
))
3547 if (gfc_intrinsic_sub_interface (c
, 1) == MATCH_YES
)
3552 /* The reference is to an external name. */
3555 gfc_procedure_use (sym
, &c
->ext
.actual
, &c
->loc
);
3557 c
->resolved_sym
= sym
;
3559 return pure_subroutine (sym
, sym
->name
, &c
->loc
);
3563 /* Resolve a subroutine call. Although it was tempting to use the same code
3564 for functions, subroutines and functions are stored differently and this
3565 makes things awkward. */
3568 resolve_call (gfc_code
*c
)
3571 procedure_type ptype
= PROC_INTRINSIC
;
3572 gfc_symbol
*csym
, *sym
;
3573 bool no_formal_args
;
3575 csym
= c
->symtree
? c
->symtree
->n
.sym
: NULL
;
3577 if (csym
&& csym
->ts
.type
!= BT_UNKNOWN
)
3579 gfc_error ("%qs at %L has a type, which is not consistent with "
3580 "the CALL at %L", csym
->name
, &csym
->declared_at
, &c
->loc
);
3584 if (csym
&& gfc_current_ns
->parent
&& csym
->ns
!= gfc_current_ns
)
3587 gfc_find_sym_tree (c
->symtree
->name
, gfc_current_ns
, 1, &st
);
3588 sym
= st
? st
->n
.sym
: NULL
;
3589 if (sym
&& csym
!= sym
3590 && sym
->ns
== gfc_current_ns
3591 && sym
->attr
.flavor
== FL_PROCEDURE
3592 && sym
->attr
.contained
)
3595 if (csym
->attr
.generic
)
3596 c
->symtree
->n
.sym
= sym
;
3599 csym
= c
->symtree
->n
.sym
;
3603 /* If this ia a deferred TBP, c->expr1 will be set. */
3604 if (!c
->expr1
&& csym
)
3606 if (csym
->attr
.abstract
)
3608 gfc_error ("ABSTRACT INTERFACE %qs must not be referenced at %L",
3609 csym
->name
, &c
->loc
);
3613 /* Subroutines without the RECURSIVE attribution are not allowed to
3615 if (is_illegal_recursion (csym
, gfc_current_ns
))
3617 if (csym
->attr
.entry
&& csym
->ns
->entries
)
3618 gfc_error ("ENTRY %qs at %L cannot be called recursively, "
3619 "as subroutine %qs is not RECURSIVE",
3620 csym
->name
, &c
->loc
, csym
->ns
->entries
->sym
->name
);
3622 gfc_error ("SUBROUTINE %qs at %L cannot be called recursively, "
3623 "as it is not RECURSIVE", csym
->name
, &c
->loc
);
3629 /* Switch off assumed size checking and do this again for certain kinds
3630 of procedure, once the procedure itself is resolved. */
3631 need_full_assumed_size
++;
3634 ptype
= csym
->attr
.proc
;
3636 no_formal_args
= csym
&& is_external_proc (csym
)
3637 && gfc_sym_get_dummy_args (csym
) == NULL
;
3638 if (!resolve_actual_arglist (c
->ext
.actual
, ptype
, no_formal_args
))
3641 /* Resume assumed_size checking. */
3642 need_full_assumed_size
--;
3644 /* If external, check for usage. */
3645 if (csym
&& is_external_proc (csym
))
3646 resolve_global_procedure (csym
, &c
->loc
, &c
->ext
.actual
, 1);
3649 if (c
->resolved_sym
== NULL
)
3651 c
->resolved_isym
= NULL
;
3652 switch (procedure_kind (csym
))
3655 t
= resolve_generic_s (c
);
3658 case PTYPE_SPECIFIC
:
3659 t
= resolve_specific_s (c
);
3663 t
= resolve_unknown_s (c
);
3667 gfc_internal_error ("resolve_subroutine(): bad function type");
3671 /* Some checks of elemental subroutine actual arguments. */
3672 if (!resolve_elemental_actual (NULL
, c
))
3676 update_current_proc_array_outer_dependency (csym
);
3678 /* Typebound procedure: Assume the worst. */
3679 gfc_current_ns
->proc_name
->attr
.array_outer_dependency
= 1;
3685 /* Compare the shapes of two arrays that have non-NULL shapes. If both
3686 op1->shape and op2->shape are non-NULL return true if their shapes
3687 match. If both op1->shape and op2->shape are non-NULL return false
3688 if their shapes do not match. If either op1->shape or op2->shape is
3689 NULL, return true. */
3692 compare_shapes (gfc_expr
*op1
, gfc_expr
*op2
)
3699 if (op1
->shape
!= NULL
&& op2
->shape
!= NULL
)
3701 for (i
= 0; i
< op1
->rank
; i
++)
3703 if (mpz_cmp (op1
->shape
[i
], op2
->shape
[i
]) != 0)
3705 gfc_error ("Shapes for operands at %L and %L are not conformable",
3706 &op1
->where
, &op2
->where
);
3716 /* Convert a logical operator to the corresponding bitwise intrinsic call.
3717 For example A .AND. B becomes IAND(A, B). */
3719 logical_to_bitwise (gfc_expr
*e
)
3721 gfc_expr
*tmp
, *op1
, *op2
;
3723 gfc_actual_arglist
*args
= NULL
;
3725 gcc_assert (e
->expr_type
== EXPR_OP
);
3727 isym
= GFC_ISYM_NONE
;
3728 op1
= e
->value
.op
.op1
;
3729 op2
= e
->value
.op
.op2
;
3731 switch (e
->value
.op
.op
)
3734 isym
= GFC_ISYM_NOT
;
3737 isym
= GFC_ISYM_IAND
;
3740 isym
= GFC_ISYM_IOR
;
3742 case INTRINSIC_NEQV
:
3743 isym
= GFC_ISYM_IEOR
;
3746 /* "Bitwise eqv" is just the complement of NEQV === IEOR.
3747 Change the old expression to NEQV, which will get replaced by IEOR,
3748 and wrap it in NOT. */
3749 tmp
= gfc_copy_expr (e
);
3750 tmp
->value
.op
.op
= INTRINSIC_NEQV
;
3751 tmp
= logical_to_bitwise (tmp
);
3752 isym
= GFC_ISYM_NOT
;
3757 gfc_internal_error ("logical_to_bitwise(): Bad intrinsic");
3760 /* Inherit the original operation's operands as arguments. */
3761 args
= gfc_get_actual_arglist ();
3765 args
->next
= gfc_get_actual_arglist ();
3766 args
->next
->expr
= op2
;
3769 /* Convert the expression to a function call. */
3770 e
->expr_type
= EXPR_FUNCTION
;
3771 e
->value
.function
.actual
= args
;
3772 e
->value
.function
.isym
= gfc_intrinsic_function_by_id (isym
);
3773 e
->value
.function
.name
= e
->value
.function
.isym
->name
;
3774 e
->value
.function
.esym
= NULL
;
3776 /* Make up a pre-resolved function call symtree if we need to. */
3777 if (!e
->symtree
|| !e
->symtree
->n
.sym
)
3780 gfc_get_ha_sym_tree (e
->value
.function
.isym
->name
, &e
->symtree
);
3781 sym
= e
->symtree
->n
.sym
;
3783 sym
->attr
.flavor
= FL_PROCEDURE
;
3784 sym
->attr
.function
= 1;
3785 sym
->attr
.elemental
= 1;
3787 sym
->attr
.referenced
= 1;
3788 gfc_intrinsic_symbol (sym
);
3789 gfc_commit_symbol (sym
);
3792 args
->name
= e
->value
.function
.isym
->formal
->name
;
3793 if (e
->value
.function
.isym
->formal
->next
)
3794 args
->next
->name
= e
->value
.function
.isym
->formal
->next
->name
;
3799 /* Recursively append candidate UOP to CANDIDATES. Store the number of
3800 candidates in CANDIDATES_LEN. */
3802 lookup_uop_fuzzy_find_candidates (gfc_symtree
*uop
,
3804 size_t &candidates_len
)
3811 /* Not sure how to properly filter here. Use all for a start.
3812 n.uop.op is NULL for empty interface operators (is that legal?) disregard
3813 these as i suppose they don't make terribly sense. */
3815 if (uop
->n
.uop
->op
!= NULL
)
3816 vec_push (candidates
, candidates_len
, uop
->name
);
3820 lookup_uop_fuzzy_find_candidates (p
, candidates
, candidates_len
);
3824 lookup_uop_fuzzy_find_candidates (p
, candidates
, candidates_len
);
3827 /* Lookup user-operator OP fuzzily, taking names in UOP into account. */
3830 lookup_uop_fuzzy (const char *op
, gfc_symtree
*uop
)
3832 char **candidates
= NULL
;
3833 size_t candidates_len
= 0;
3834 lookup_uop_fuzzy_find_candidates (uop
, candidates
, candidates_len
);
3835 return gfc_closest_fuzzy_match (op
, candidates
);
3839 /* Callback finding an impure function as an operand to an .and. or
3840 .or. expression. Remember the last function warned about to
3841 avoid double warnings when recursing. */
3844 impure_function_callback (gfc_expr
**e
, int *walk_subtrees ATTRIBUTE_UNUSED
,
3849 static gfc_expr
*last
= NULL
;
3850 bool *found
= (bool *) data
;
3852 if (f
->expr_type
== EXPR_FUNCTION
)
3855 if (f
!= last
&& !gfc_pure_function (f
, &name
)
3856 && !gfc_implicit_pure_function (f
))
3859 gfc_warning (OPT_Wfunction_elimination
,
3860 "Impure function %qs at %L might not be evaluated",
3863 gfc_warning (OPT_Wfunction_elimination
,
3864 "Impure function at %L might not be evaluated",
3874 /* Resolve an operator expression node. This can involve replacing the
3875 operation with a user defined function call. */
3878 resolve_operator (gfc_expr
*e
)
3880 gfc_expr
*op1
, *op2
;
3882 bool dual_locus_error
;
3885 /* Resolve all subnodes-- give them types. */
3887 switch (e
->value
.op
.op
)
3890 if (!gfc_resolve_expr (e
->value
.op
.op2
))
3896 case INTRINSIC_UPLUS
:
3897 case INTRINSIC_UMINUS
:
3898 case INTRINSIC_PARENTHESES
:
3899 if (!gfc_resolve_expr (e
->value
.op
.op1
))
3904 /* Typecheck the new node. */
3906 op1
= e
->value
.op
.op1
;
3907 op2
= e
->value
.op
.op2
;
3908 dual_locus_error
= false;
3910 if ((op1
&& op1
->expr_type
== EXPR_NULL
)
3911 || (op2
&& op2
->expr_type
== EXPR_NULL
))
3913 sprintf (msg
, _("Invalid context for NULL() pointer at %%L"));
3917 switch (e
->value
.op
.op
)
3919 case INTRINSIC_UPLUS
:
3920 case INTRINSIC_UMINUS
:
3921 if (op1
->ts
.type
== BT_INTEGER
3922 || op1
->ts
.type
== BT_REAL
3923 || op1
->ts
.type
== BT_COMPLEX
)
3929 sprintf (msg
, _("Operand of unary numeric operator %%<%s%%> at %%L is %s"),
3930 gfc_op2string (e
->value
.op
.op
), gfc_typename (&e
->ts
));
3933 case INTRINSIC_PLUS
:
3934 case INTRINSIC_MINUS
:
3935 case INTRINSIC_TIMES
:
3936 case INTRINSIC_DIVIDE
:
3937 case INTRINSIC_POWER
:
3938 if (gfc_numeric_ts (&op1
->ts
) && gfc_numeric_ts (&op2
->ts
))
3940 gfc_type_convert_binary (e
, 1);
3944 if (op1
->ts
.type
== BT_DERIVED
|| op2
->ts
.type
== BT_DERIVED
)
3946 _("Unexpected derived-type entities in binary intrinsic "
3947 "numeric operator %%<%s%%> at %%L"),
3948 gfc_op2string (e
->value
.op
.op
));
3951 _("Operands of binary numeric operator %%<%s%%> at %%L are %s/%s"),
3952 gfc_op2string (e
->value
.op
.op
), gfc_typename (&op1
->ts
),
3953 gfc_typename (&op2
->ts
));
3956 case INTRINSIC_CONCAT
:
3957 if (op1
->ts
.type
== BT_CHARACTER
&& op2
->ts
.type
== BT_CHARACTER
3958 && op1
->ts
.kind
== op2
->ts
.kind
)
3960 e
->ts
.type
= BT_CHARACTER
;
3961 e
->ts
.kind
= op1
->ts
.kind
;
3966 _("Operands of string concatenation operator at %%L are %s/%s"),
3967 gfc_typename (&op1
->ts
), gfc_typename (&op2
->ts
));
3973 case INTRINSIC_NEQV
:
3974 if (op1
->ts
.type
== BT_LOGICAL
&& op2
->ts
.type
== BT_LOGICAL
)
3976 e
->ts
.type
= BT_LOGICAL
;
3977 e
->ts
.kind
= gfc_kind_max (op1
, op2
);
3978 if (op1
->ts
.kind
< e
->ts
.kind
)
3979 gfc_convert_type (op1
, &e
->ts
, 2);
3980 else if (op2
->ts
.kind
< e
->ts
.kind
)
3981 gfc_convert_type (op2
, &e
->ts
, 2);
3983 if (flag_frontend_optimize
&&
3984 (e
->value
.op
.op
== INTRINSIC_AND
|| e
->value
.op
.op
== INTRINSIC_OR
))
3986 /* Warn about short-circuiting
3987 with impure function as second operand. */
3989 gfc_expr_walker (&op2
, impure_function_callback
, &op2_f
);
3994 /* Logical ops on integers become bitwise ops with -fdec. */
3996 && (op1
->ts
.type
== BT_INTEGER
|| op2
->ts
.type
== BT_INTEGER
))
3998 e
->ts
.type
= BT_INTEGER
;
3999 e
->ts
.kind
= gfc_kind_max (op1
, op2
);
4000 if (op1
->ts
.type
!= e
->ts
.type
|| op1
->ts
.kind
!= e
->ts
.kind
)
4001 gfc_convert_type (op1
, &e
->ts
, 1);
4002 if (op2
->ts
.type
!= e
->ts
.type
|| op2
->ts
.kind
!= e
->ts
.kind
)
4003 gfc_convert_type (op2
, &e
->ts
, 1);
4004 e
= logical_to_bitwise (e
);
4008 sprintf (msg
, _("Operands of logical operator %%<%s%%> at %%L are %s/%s"),
4009 gfc_op2string (e
->value
.op
.op
), gfc_typename (&op1
->ts
),
4010 gfc_typename (&op2
->ts
));
4015 /* Logical ops on integers become bitwise ops with -fdec. */
4016 if (flag_dec
&& op1
->ts
.type
== BT_INTEGER
)
4018 e
->ts
.type
= BT_INTEGER
;
4019 e
->ts
.kind
= op1
->ts
.kind
;
4020 e
= logical_to_bitwise (e
);
4024 if (op1
->ts
.type
== BT_LOGICAL
)
4026 e
->ts
.type
= BT_LOGICAL
;
4027 e
->ts
.kind
= op1
->ts
.kind
;
4031 sprintf (msg
, _("Operand of .not. operator at %%L is %s"),
4032 gfc_typename (&op1
->ts
));
4036 case INTRINSIC_GT_OS
:
4038 case INTRINSIC_GE_OS
:
4040 case INTRINSIC_LT_OS
:
4042 case INTRINSIC_LE_OS
:
4043 if (op1
->ts
.type
== BT_COMPLEX
|| op2
->ts
.type
== BT_COMPLEX
)
4045 strcpy (msg
, _("COMPLEX quantities cannot be compared at %L"));
4052 case INTRINSIC_EQ_OS
:
4054 case INTRINSIC_NE_OS
:
4055 if (op1
->ts
.type
== BT_CHARACTER
&& op2
->ts
.type
== BT_CHARACTER
4056 && op1
->ts
.kind
== op2
->ts
.kind
)
4058 e
->ts
.type
= BT_LOGICAL
;
4059 e
->ts
.kind
= gfc_default_logical_kind
;
4063 if (gfc_numeric_ts (&op1
->ts
) && gfc_numeric_ts (&op2
->ts
))
4065 gfc_type_convert_binary (e
, 1);
4067 e
->ts
.type
= BT_LOGICAL
;
4068 e
->ts
.kind
= gfc_default_logical_kind
;
4070 if (warn_compare_reals
)
4072 gfc_intrinsic_op op
= e
->value
.op
.op
;
4074 /* Type conversion has made sure that the types of op1 and op2
4075 agree, so it is only necessary to check the first one. */
4076 if ((op1
->ts
.type
== BT_REAL
|| op1
->ts
.type
== BT_COMPLEX
)
4077 && (op
== INTRINSIC_EQ
|| op
== INTRINSIC_EQ_OS
4078 || op
== INTRINSIC_NE
|| op
== INTRINSIC_NE_OS
))
4082 if (op
== INTRINSIC_EQ
|| op
== INTRINSIC_EQ_OS
)
4083 msg
= "Equality comparison for %s at %L";
4085 msg
= "Inequality comparison for %s at %L";
4087 gfc_warning (OPT_Wcompare_reals
, msg
,
4088 gfc_typename (&op1
->ts
), &op1
->where
);
4095 if (op1
->ts
.type
== BT_LOGICAL
&& op2
->ts
.type
== BT_LOGICAL
)
4097 _("Logicals at %%L must be compared with %s instead of %s"),
4098 (e
->value
.op
.op
== INTRINSIC_EQ
4099 || e
->value
.op
.op
== INTRINSIC_EQ_OS
)
4100 ? ".eqv." : ".neqv.", gfc_op2string (e
->value
.op
.op
));
4103 _("Operands of comparison operator %%<%s%%> at %%L are %s/%s"),
4104 gfc_op2string (e
->value
.op
.op
), gfc_typename (&op1
->ts
),
4105 gfc_typename (&op2
->ts
));
4109 case INTRINSIC_USER
:
4110 if (e
->value
.op
.uop
->op
== NULL
)
4112 const char *name
= e
->value
.op
.uop
->name
;
4113 const char *guessed
;
4114 guessed
= lookup_uop_fuzzy (name
, e
->value
.op
.uop
->ns
->uop_root
);
4116 sprintf (msg
, _("Unknown operator %%<%s%%> at %%L; did you mean '%s'?"),
4119 sprintf (msg
, _("Unknown operator %%<%s%%> at %%L"), name
);
4121 else if (op2
== NULL
)
4122 sprintf (msg
, _("Operand of user operator %%<%s%%> at %%L is %s"),
4123 e
->value
.op
.uop
->name
, gfc_typename (&op1
->ts
));
4126 sprintf (msg
, _("Operands of user operator %%<%s%%> at %%L are %s/%s"),
4127 e
->value
.op
.uop
->name
, gfc_typename (&op1
->ts
),
4128 gfc_typename (&op2
->ts
));
4129 e
->value
.op
.uop
->op
->sym
->attr
.referenced
= 1;
4134 case INTRINSIC_PARENTHESES
:
4136 if (e
->ts
.type
== BT_CHARACTER
)
4137 e
->ts
.u
.cl
= op1
->ts
.u
.cl
;
4141 gfc_internal_error ("resolve_operator(): Bad intrinsic");
4144 /* Deal with arrayness of an operand through an operator. */
4148 switch (e
->value
.op
.op
)
4150 case INTRINSIC_PLUS
:
4151 case INTRINSIC_MINUS
:
4152 case INTRINSIC_TIMES
:
4153 case INTRINSIC_DIVIDE
:
4154 case INTRINSIC_POWER
:
4155 case INTRINSIC_CONCAT
:
4159 case INTRINSIC_NEQV
:
4161 case INTRINSIC_EQ_OS
:
4163 case INTRINSIC_NE_OS
:
4165 case INTRINSIC_GT_OS
:
4167 case INTRINSIC_GE_OS
:
4169 case INTRINSIC_LT_OS
:
4171 case INTRINSIC_LE_OS
:
4173 if (op1
->rank
== 0 && op2
->rank
== 0)
4176 if (op1
->rank
== 0 && op2
->rank
!= 0)
4178 e
->rank
= op2
->rank
;
4180 if (e
->shape
== NULL
)
4181 e
->shape
= gfc_copy_shape (op2
->shape
, op2
->rank
);
4184 if (op1
->rank
!= 0 && op2
->rank
== 0)
4186 e
->rank
= op1
->rank
;
4188 if (e
->shape
== NULL
)
4189 e
->shape
= gfc_copy_shape (op1
->shape
, op1
->rank
);
4192 if (op1
->rank
!= 0 && op2
->rank
!= 0)
4194 if (op1
->rank
== op2
->rank
)
4196 e
->rank
= op1
->rank
;
4197 if (e
->shape
== NULL
)
4199 t
= compare_shapes (op1
, op2
);
4203 e
->shape
= gfc_copy_shape (op1
->shape
, op1
->rank
);
4208 /* Allow higher level expressions to work. */
4211 /* Try user-defined operators, and otherwise throw an error. */
4212 dual_locus_error
= true;
4214 _("Inconsistent ranks for operator at %%L and %%L"));
4221 case INTRINSIC_PARENTHESES
:
4223 case INTRINSIC_UPLUS
:
4224 case INTRINSIC_UMINUS
:
4225 /* Simply copy arrayness attribute */
4226 e
->rank
= op1
->rank
;
4228 if (e
->shape
== NULL
)
4229 e
->shape
= gfc_copy_shape (op1
->shape
, op1
->rank
);
4237 /* Attempt to simplify the expression. */
4240 t
= gfc_simplify_expr (e
, 0);
4241 /* Some calls do not succeed in simplification and return false
4242 even though there is no error; e.g. variable references to
4243 PARAMETER arrays. */
4244 if (!gfc_is_constant_expr (e
))
4252 match m
= gfc_extend_expr (e
);
4255 if (m
== MATCH_ERROR
)
4259 if (dual_locus_error
)
4260 gfc_error (msg
, &op1
->where
, &op2
->where
);
4262 gfc_error (msg
, &e
->where
);
4268 /************** Array resolution subroutines **************/
4271 { CMP_LT
, CMP_EQ
, CMP_GT
, CMP_UNKNOWN
};
4273 /* Compare two integer expressions. */
4275 static compare_result
4276 compare_bound (gfc_expr
*a
, gfc_expr
*b
)
4280 if (a
== NULL
|| a
->expr_type
!= EXPR_CONSTANT
4281 || b
== NULL
|| b
->expr_type
!= EXPR_CONSTANT
)
4284 /* If either of the types isn't INTEGER, we must have
4285 raised an error earlier. */
4287 if (a
->ts
.type
!= BT_INTEGER
|| b
->ts
.type
!= BT_INTEGER
)
4290 i
= mpz_cmp (a
->value
.integer
, b
->value
.integer
);
4300 /* Compare an integer expression with an integer. */
4302 static compare_result
4303 compare_bound_int (gfc_expr
*a
, int b
)
4307 if (a
== NULL
|| a
->expr_type
!= EXPR_CONSTANT
)
4310 if (a
->ts
.type
!= BT_INTEGER
)
4311 gfc_internal_error ("compare_bound_int(): Bad expression");
4313 i
= mpz_cmp_si (a
->value
.integer
, b
);
4323 /* Compare an integer expression with a mpz_t. */
4325 static compare_result
4326 compare_bound_mpz_t (gfc_expr
*a
, mpz_t b
)
4330 if (a
== NULL
|| a
->expr_type
!= EXPR_CONSTANT
)
4333 if (a
->ts
.type
!= BT_INTEGER
)
4334 gfc_internal_error ("compare_bound_int(): Bad expression");
4336 i
= mpz_cmp (a
->value
.integer
, b
);
4346 /* Compute the last value of a sequence given by a triplet.
4347 Return 0 if it wasn't able to compute the last value, or if the
4348 sequence if empty, and 1 otherwise. */
4351 compute_last_value_for_triplet (gfc_expr
*start
, gfc_expr
*end
,
4352 gfc_expr
*stride
, mpz_t last
)
4356 if (start
== NULL
|| start
->expr_type
!= EXPR_CONSTANT
4357 || end
== NULL
|| end
->expr_type
!= EXPR_CONSTANT
4358 || (stride
!= NULL
&& stride
->expr_type
!= EXPR_CONSTANT
))
4361 if (start
->ts
.type
!= BT_INTEGER
|| end
->ts
.type
!= BT_INTEGER
4362 || (stride
!= NULL
&& stride
->ts
.type
!= BT_INTEGER
))
4365 if (stride
== NULL
|| compare_bound_int (stride
, 1) == CMP_EQ
)
4367 if (compare_bound (start
, end
) == CMP_GT
)
4369 mpz_set (last
, end
->value
.integer
);
4373 if (compare_bound_int (stride
, 0) == CMP_GT
)
4375 /* Stride is positive */
4376 if (mpz_cmp (start
->value
.integer
, end
->value
.integer
) > 0)
4381 /* Stride is negative */
4382 if (mpz_cmp (start
->value
.integer
, end
->value
.integer
) < 0)
4387 mpz_sub (rem
, end
->value
.integer
, start
->value
.integer
);
4388 mpz_tdiv_r (rem
, rem
, stride
->value
.integer
);
4389 mpz_sub (last
, end
->value
.integer
, rem
);
4396 /* Compare a single dimension of an array reference to the array
4400 check_dimension (int i
, gfc_array_ref
*ar
, gfc_array_spec
*as
)
4404 if (ar
->dimen_type
[i
] == DIMEN_STAR
)
4406 gcc_assert (ar
->stride
[i
] == NULL
);
4407 /* This implies [*] as [*:] and [*:3] are not possible. */
4408 if (ar
->start
[i
] == NULL
)
4410 gcc_assert (ar
->end
[i
] == NULL
);
4415 /* Given start, end and stride values, calculate the minimum and
4416 maximum referenced indexes. */
4418 switch (ar
->dimen_type
[i
])
4421 case DIMEN_THIS_IMAGE
:
4426 if (compare_bound (ar
->start
[i
], as
->lower
[i
]) == CMP_LT
)
4429 gfc_warning (0, "Array reference at %L is out of bounds "
4430 "(%ld < %ld) in dimension %d", &ar
->c_where
[i
],
4431 mpz_get_si (ar
->start
[i
]->value
.integer
),
4432 mpz_get_si (as
->lower
[i
]->value
.integer
), i
+1);
4434 gfc_warning (0, "Array reference at %L is out of bounds "
4435 "(%ld < %ld) in codimension %d", &ar
->c_where
[i
],
4436 mpz_get_si (ar
->start
[i
]->value
.integer
),
4437 mpz_get_si (as
->lower
[i
]->value
.integer
),
4441 if (compare_bound (ar
->start
[i
], as
->upper
[i
]) == CMP_GT
)
4444 gfc_warning (0, "Array reference at %L is out of bounds "
4445 "(%ld > %ld) in dimension %d", &ar
->c_where
[i
],
4446 mpz_get_si (ar
->start
[i
]->value
.integer
),
4447 mpz_get_si (as
->upper
[i
]->value
.integer
), i
+1);
4449 gfc_warning (0, "Array reference at %L is out of bounds "
4450 "(%ld > %ld) in codimension %d", &ar
->c_where
[i
],
4451 mpz_get_si (ar
->start
[i
]->value
.integer
),
4452 mpz_get_si (as
->upper
[i
]->value
.integer
),
4461 #define AR_START (ar->start[i] ? ar->start[i] : as->lower[i])
4462 #define AR_END (ar->end[i] ? ar->end[i] : as->upper[i])
4464 compare_result comp_start_end
= compare_bound (AR_START
, AR_END
);
4466 /* Check for zero stride, which is not allowed. */
4467 if (compare_bound_int (ar
->stride
[i
], 0) == CMP_EQ
)
4469 gfc_error ("Illegal stride of zero at %L", &ar
->c_where
[i
]);
4473 /* if start == len || (stride > 0 && start < len)
4474 || (stride < 0 && start > len),
4475 then the array section contains at least one element. In this
4476 case, there is an out-of-bounds access if
4477 (start < lower || start > upper). */
4478 if (compare_bound (AR_START
, AR_END
) == CMP_EQ
4479 || ((compare_bound_int (ar
->stride
[i
], 0) == CMP_GT
4480 || ar
->stride
[i
] == NULL
) && comp_start_end
== CMP_LT
)
4481 || (compare_bound_int (ar
->stride
[i
], 0) == CMP_LT
4482 && comp_start_end
== CMP_GT
))
4484 if (compare_bound (AR_START
, as
->lower
[i
]) == CMP_LT
)
4486 gfc_warning (0, "Lower array reference at %L is out of bounds "
4487 "(%ld < %ld) in dimension %d", &ar
->c_where
[i
],
4488 mpz_get_si (AR_START
->value
.integer
),
4489 mpz_get_si (as
->lower
[i
]->value
.integer
), i
+1);
4492 if (compare_bound (AR_START
, as
->upper
[i
]) == CMP_GT
)
4494 gfc_warning (0, "Lower array reference at %L is out of bounds "
4495 "(%ld > %ld) in dimension %d", &ar
->c_where
[i
],
4496 mpz_get_si (AR_START
->value
.integer
),
4497 mpz_get_si (as
->upper
[i
]->value
.integer
), i
+1);
4502 /* If we can compute the highest index of the array section,
4503 then it also has to be between lower and upper. */
4504 mpz_init (last_value
);
4505 if (compute_last_value_for_triplet (AR_START
, AR_END
, ar
->stride
[i
],
4508 if (compare_bound_mpz_t (as
->lower
[i
], last_value
) == CMP_GT
)
4510 gfc_warning (0, "Upper array reference at %L is out of bounds "
4511 "(%ld < %ld) in dimension %d", &ar
->c_where
[i
],
4512 mpz_get_si (last_value
),
4513 mpz_get_si (as
->lower
[i
]->value
.integer
), i
+1);
4514 mpz_clear (last_value
);
4517 if (compare_bound_mpz_t (as
->upper
[i
], last_value
) == CMP_LT
)
4519 gfc_warning (0, "Upper array reference at %L is out of bounds "
4520 "(%ld > %ld) in dimension %d", &ar
->c_where
[i
],
4521 mpz_get_si (last_value
),
4522 mpz_get_si (as
->upper
[i
]->value
.integer
), i
+1);
4523 mpz_clear (last_value
);
4527 mpz_clear (last_value
);
4535 gfc_internal_error ("check_dimension(): Bad array reference");
4542 /* Compare an array reference with an array specification. */
4545 compare_spec_to_ref (gfc_array_ref
*ar
)
4552 /* TODO: Full array sections are only allowed as actual parameters. */
4553 if (as
->type
== AS_ASSUMED_SIZE
4554 && (/*ar->type == AR_FULL
4555 ||*/ (ar
->type
== AR_SECTION
4556 && ar
->dimen_type
[i
] == DIMEN_RANGE
&& ar
->end
[i
] == NULL
)))
4558 gfc_error ("Rightmost upper bound of assumed size array section "
4559 "not specified at %L", &ar
->where
);
4563 if (ar
->type
== AR_FULL
)
4566 if (as
->rank
!= ar
->dimen
)
4568 gfc_error ("Rank mismatch in array reference at %L (%d/%d)",
4569 &ar
->where
, ar
->dimen
, as
->rank
);
4573 /* ar->codimen == 0 is a local array. */
4574 if (as
->corank
!= ar
->codimen
&& ar
->codimen
!= 0)
4576 gfc_error ("Coindex rank mismatch in array reference at %L (%d/%d)",
4577 &ar
->where
, ar
->codimen
, as
->corank
);
4581 for (i
= 0; i
< as
->rank
; i
++)
4582 if (!check_dimension (i
, ar
, as
))
4585 /* Local access has no coarray spec. */
4586 if (ar
->codimen
!= 0)
4587 for (i
= as
->rank
; i
< as
->rank
+ as
->corank
; i
++)
4589 if (ar
->dimen_type
[i
] != DIMEN_ELEMENT
&& !ar
->in_allocate
4590 && ar
->dimen_type
[i
] != DIMEN_THIS_IMAGE
)
4592 gfc_error ("Coindex of codimension %d must be a scalar at %L",
4593 i
+ 1 - as
->rank
, &ar
->where
);
4596 if (!check_dimension (i
, ar
, as
))
4604 /* Resolve one part of an array index. */
4607 gfc_resolve_index_1 (gfc_expr
*index
, int check_scalar
,
4608 int force_index_integer_kind
)
4615 if (!gfc_resolve_expr (index
))
4618 if (check_scalar
&& index
->rank
!= 0)
4620 gfc_error ("Array index at %L must be scalar", &index
->where
);
4624 if (index
->ts
.type
!= BT_INTEGER
&& index
->ts
.type
!= BT_REAL
)
4626 gfc_error ("Array index at %L must be of INTEGER type, found %s",
4627 &index
->where
, gfc_basic_typename (index
->ts
.type
));
4631 if (index
->ts
.type
== BT_REAL
)
4632 if (!gfc_notify_std (GFC_STD_LEGACY
, "REAL array index at %L",
4636 if ((index
->ts
.kind
!= gfc_index_integer_kind
4637 && force_index_integer_kind
)
4638 || index
->ts
.type
!= BT_INTEGER
)
4641 ts
.type
= BT_INTEGER
;
4642 ts
.kind
= gfc_index_integer_kind
;
4644 gfc_convert_type_warn (index
, &ts
, 2, 0);
4650 /* Resolve one part of an array index. */
4653 gfc_resolve_index (gfc_expr
*index
, int check_scalar
)
4655 return gfc_resolve_index_1 (index
, check_scalar
, 1);
4658 /* Resolve a dim argument to an intrinsic function. */
4661 gfc_resolve_dim_arg (gfc_expr
*dim
)
4666 if (!gfc_resolve_expr (dim
))
4671 gfc_error ("Argument dim at %L must be scalar", &dim
->where
);
4676 if (dim
->ts
.type
!= BT_INTEGER
)
4678 gfc_error ("Argument dim at %L must be of INTEGER type", &dim
->where
);
4682 if (dim
->ts
.kind
!= gfc_index_integer_kind
)
4687 ts
.type
= BT_INTEGER
;
4688 ts
.kind
= gfc_index_integer_kind
;
4690 gfc_convert_type_warn (dim
, &ts
, 2, 0);
4696 /* Given an expression that contains array references, update those array
4697 references to point to the right array specifications. While this is
4698 filled in during matching, this information is difficult to save and load
4699 in a module, so we take care of it here.
4701 The idea here is that the original array reference comes from the
4702 base symbol. We traverse the list of reference structures, setting
4703 the stored reference to references. Component references can
4704 provide an additional array specification. */
4707 find_array_spec (gfc_expr
*e
)
4713 if (e
->symtree
->n
.sym
->ts
.type
== BT_CLASS
)
4714 as
= CLASS_DATA (e
->symtree
->n
.sym
)->as
;
4716 as
= e
->symtree
->n
.sym
->as
;
4718 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
4723 gfc_internal_error ("find_array_spec(): Missing spec");
4730 c
= ref
->u
.c
.component
;
4731 if (c
->attr
.dimension
)
4734 gfc_internal_error ("find_array_spec(): unused as(1)");
4746 gfc_internal_error ("find_array_spec(): unused as(2)");
4750 /* Resolve an array reference. */
4753 resolve_array_ref (gfc_array_ref
*ar
)
4755 int i
, check_scalar
;
4758 for (i
= 0; i
< ar
->dimen
+ ar
->codimen
; i
++)
4760 check_scalar
= ar
->dimen_type
[i
] == DIMEN_RANGE
;
4762 /* Do not force gfc_index_integer_kind for the start. We can
4763 do fine with any integer kind. This avoids temporary arrays
4764 created for indexing with a vector. */
4765 if (!gfc_resolve_index_1 (ar
->start
[i
], check_scalar
, 0))
4767 if (!gfc_resolve_index (ar
->end
[i
], check_scalar
))
4769 if (!gfc_resolve_index (ar
->stride
[i
], check_scalar
))
4774 if (ar
->dimen_type
[i
] == DIMEN_UNKNOWN
)
4778 ar
->dimen_type
[i
] = DIMEN_ELEMENT
;
4782 ar
->dimen_type
[i
] = DIMEN_VECTOR
;
4783 if (e
->expr_type
== EXPR_VARIABLE
4784 && e
->symtree
->n
.sym
->ts
.type
== BT_DERIVED
)
4785 ar
->start
[i
] = gfc_get_parentheses (e
);
4789 gfc_error ("Array index at %L is an array of rank %d",
4790 &ar
->c_where
[i
], e
->rank
);
4794 /* Fill in the upper bound, which may be lower than the
4795 specified one for something like a(2:10:5), which is
4796 identical to a(2:7:5). Only relevant for strides not equal
4797 to one. Don't try a division by zero. */
4798 if (ar
->dimen_type
[i
] == DIMEN_RANGE
4799 && ar
->stride
[i
] != NULL
&& ar
->stride
[i
]->expr_type
== EXPR_CONSTANT
4800 && mpz_cmp_si (ar
->stride
[i
]->value
.integer
, 1L) != 0
4801 && mpz_cmp_si (ar
->stride
[i
]->value
.integer
, 0L) != 0)
4805 if (gfc_ref_dimen_size (ar
, i
, &size
, &end
))
4807 if (ar
->end
[i
] == NULL
)
4810 gfc_get_constant_expr (BT_INTEGER
, gfc_index_integer_kind
,
4812 mpz_set (ar
->end
[i
]->value
.integer
, end
);
4814 else if (ar
->end
[i
]->ts
.type
== BT_INTEGER
4815 && ar
->end
[i
]->expr_type
== EXPR_CONSTANT
)
4817 mpz_set (ar
->end
[i
]->value
.integer
, end
);
4828 if (ar
->type
== AR_FULL
)
4830 if (ar
->as
->rank
== 0)
4831 ar
->type
= AR_ELEMENT
;
4833 /* Make sure array is the same as array(:,:), this way
4834 we don't need to special case all the time. */
4835 ar
->dimen
= ar
->as
->rank
;
4836 for (i
= 0; i
< ar
->dimen
; i
++)
4838 ar
->dimen_type
[i
] = DIMEN_RANGE
;
4840 gcc_assert (ar
->start
[i
] == NULL
);
4841 gcc_assert (ar
->end
[i
] == NULL
);
4842 gcc_assert (ar
->stride
[i
] == NULL
);
4846 /* If the reference type is unknown, figure out what kind it is. */
4848 if (ar
->type
== AR_UNKNOWN
)
4850 ar
->type
= AR_ELEMENT
;
4851 for (i
= 0; i
< ar
->dimen
; i
++)
4852 if (ar
->dimen_type
[i
] == DIMEN_RANGE
4853 || ar
->dimen_type
[i
] == DIMEN_VECTOR
)
4855 ar
->type
= AR_SECTION
;
4860 if (!ar
->as
->cray_pointee
&& !compare_spec_to_ref (ar
))
4863 if (ar
->as
->corank
&& ar
->codimen
== 0)
4866 ar
->codimen
= ar
->as
->corank
;
4867 for (n
= ar
->dimen
; n
< ar
->dimen
+ ar
->codimen
; n
++)
4868 ar
->dimen_type
[n
] = DIMEN_THIS_IMAGE
;
4876 resolve_substring (gfc_ref
*ref
, 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
;
4969 for (char_ref
= e
->ref
; char_ref
; char_ref
= char_ref
->next
)
4971 if (char_ref
->type
== REF_SUBSTRING
|| char_ref
->type
== REF_INQUIRY
)
4973 if (char_ref
->type
== REF_COMPONENT
)
4974 ts
= &char_ref
->u
.c
.component
->ts
;
4977 if (!char_ref
|| char_ref
->type
== REF_INQUIRY
)
4980 gcc_assert (char_ref
->next
== NULL
);
4984 if (e
->ts
.u
.cl
->length
)
4985 gfc_free_expr (e
->ts
.u
.cl
->length
);
4986 else if (e
->expr_type
== EXPR_VARIABLE
&& e
->symtree
->n
.sym
->attr
.dummy
)
4990 e
->ts
.type
= BT_CHARACTER
;
4991 e
->ts
.kind
= gfc_default_character_kind
;
4994 e
->ts
.u
.cl
= gfc_new_charlen (gfc_current_ns
, NULL
);
4996 if (char_ref
->u
.ss
.start
)
4997 start
= gfc_copy_expr (char_ref
->u
.ss
.start
);
4999 start
= gfc_get_int_expr (gfc_charlen_int_kind
, NULL
, 1);
5001 if (char_ref
->u
.ss
.end
)
5002 end
= gfc_copy_expr (char_ref
->u
.ss
.end
);
5003 else if (e
->expr_type
== EXPR_VARIABLE
)
5006 ts
= &e
->symtree
->n
.sym
->ts
;
5007 end
= gfc_copy_expr (ts
->u
.cl
->length
);
5014 gfc_free_expr (start
);
5015 gfc_free_expr (end
);
5019 /* Length = (end - start + 1). */
5020 e
->ts
.u
.cl
->length
= gfc_subtract (end
, start
);
5021 e
->ts
.u
.cl
->length
= gfc_add (e
->ts
.u
.cl
->length
,
5022 gfc_get_int_expr (gfc_charlen_int_kind
,
5025 /* F2008, 6.4.1: Both the starting point and the ending point shall
5026 be within the range 1, 2, ..., n unless the starting point exceeds
5027 the ending point, in which case the substring has length zero. */
5029 if (mpz_cmp_si (e
->ts
.u
.cl
->length
->value
.integer
, 0) < 0)
5030 mpz_set_si (e
->ts
.u
.cl
->length
->value
.integer
, 0);
5032 e
->ts
.u
.cl
->length
->ts
.type
= BT_INTEGER
;
5033 e
->ts
.u
.cl
->length
->ts
.kind
= gfc_charlen_int_kind
;
5035 /* Make sure that the length is simplified. */
5036 gfc_simplify_expr (e
->ts
.u
.cl
->length
, 1);
5037 gfc_resolve_expr (e
->ts
.u
.cl
->length
);
5041 /* Resolve subtype references. */
5044 resolve_ref (gfc_expr
*expr
)
5046 int current_part_dimension
, n_components
, seen_part_dimension
;
5047 gfc_ref
*ref
, **prev
;
5050 for (ref
= expr
->ref
; ref
; ref
= ref
->next
)
5051 if (ref
->type
== REF_ARRAY
&& ref
->u
.ar
.as
== NULL
)
5053 find_array_spec (expr
);
5058 for (ref
= expr
->ref
, prev
= &expr
->ref
; ref
; prev
= &ref
->next
, ref
= ref
->next
)
5062 if (!resolve_array_ref (&ref
->u
.ar
))
5071 equal_length
= false;
5072 if (!resolve_substring (ref
, &equal_length
))
5075 if (expr
->expr_type
!= EXPR_SUBSTRING
&& equal_length
)
5077 /* Remove the reference and move the charlen, if any. */
5080 expr
->ts
.u
.cl
= ref
->u
.ss
.length
;
5081 ref
->u
.ss
.length
= NULL
;
5082 gfc_free_ref_list (ref
);
5087 /* Check constraints on part references. */
5089 current_part_dimension
= 0;
5090 seen_part_dimension
= 0;
5093 for (ref
= expr
->ref
; ref
; ref
= ref
->next
)
5098 switch (ref
->u
.ar
.type
)
5101 /* Coarray scalar. */
5102 if (ref
->u
.ar
.as
->rank
== 0)
5104 current_part_dimension
= 0;
5109 current_part_dimension
= 1;
5113 current_part_dimension
= 0;
5117 gfc_internal_error ("resolve_ref(): Bad array reference");
5123 if (current_part_dimension
|| seen_part_dimension
)
5126 if (ref
->u
.c
.component
->attr
.pointer
5127 || ref
->u
.c
.component
->attr
.proc_pointer
5128 || (ref
->u
.c
.component
->ts
.type
== BT_CLASS
5129 && CLASS_DATA (ref
->u
.c
.component
)->attr
.pointer
))
5131 gfc_error ("Component to the right of a part reference "
5132 "with nonzero rank must not have the POINTER "
5133 "attribute at %L", &expr
->where
);
5136 else if (ref
->u
.c
.component
->attr
.allocatable
5137 || (ref
->u
.c
.component
->ts
.type
== BT_CLASS
5138 && CLASS_DATA (ref
->u
.c
.component
)->attr
.allocatable
))
5141 gfc_error ("Component to the right of a part reference "
5142 "with nonzero rank must not have the ALLOCATABLE "
5143 "attribute at %L", &expr
->where
);
5156 if (((ref
->type
== REF_COMPONENT
&& n_components
> 1)
5157 || ref
->next
== NULL
)
5158 && current_part_dimension
5159 && seen_part_dimension
)
5161 gfc_error ("Two or more part references with nonzero rank must "
5162 "not be specified at %L", &expr
->where
);
5166 if (ref
->type
== REF_COMPONENT
)
5168 if (current_part_dimension
)
5169 seen_part_dimension
= 1;
5171 /* reset to make sure */
5172 current_part_dimension
= 0;
5180 /* Given an expression, determine its shape. This is easier than it sounds.
5181 Leaves the shape array NULL if it is not possible to determine the shape. */
5184 expression_shape (gfc_expr
*e
)
5186 mpz_t array
[GFC_MAX_DIMENSIONS
];
5189 if (e
->rank
<= 0 || e
->shape
!= NULL
)
5192 for (i
= 0; i
< e
->rank
; i
++)
5193 if (!gfc_array_dimen_size (e
, i
, &array
[i
]))
5196 e
->shape
= gfc_get_shape (e
->rank
);
5198 memcpy (e
->shape
, array
, e
->rank
* sizeof (mpz_t
));
5203 for (i
--; i
>= 0; i
--)
5204 mpz_clear (array
[i
]);
5208 /* Given a variable expression node, compute the rank of the expression by
5209 examining the base symbol and any reference structures it may have. */
5212 expression_rank (gfc_expr
*e
)
5217 /* Just to make sure, because EXPR_COMPCALL's also have an e->ref and that
5218 could lead to serious confusion... */
5219 gcc_assert (e
->expr_type
!= EXPR_COMPCALL
);
5223 if (e
->expr_type
== EXPR_ARRAY
)
5225 /* Constructors can have a rank different from one via RESHAPE(). */
5227 if (e
->symtree
== NULL
)
5233 e
->rank
= (e
->symtree
->n
.sym
->as
== NULL
)
5234 ? 0 : e
->symtree
->n
.sym
->as
->rank
;
5240 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
5242 if (ref
->type
== REF_COMPONENT
&& ref
->u
.c
.component
->attr
.proc_pointer
5243 && ref
->u
.c
.component
->attr
.function
&& !ref
->next
)
5244 rank
= ref
->u
.c
.component
->as
? ref
->u
.c
.component
->as
->rank
: 0;
5246 if (ref
->type
!= REF_ARRAY
)
5249 if (ref
->u
.ar
.type
== AR_FULL
)
5251 rank
= ref
->u
.ar
.as
->rank
;
5255 if (ref
->u
.ar
.type
== AR_SECTION
)
5257 /* Figure out the rank of the section. */
5259 gfc_internal_error ("expression_rank(): Two array specs");
5261 for (i
= 0; i
< ref
->u
.ar
.dimen
; i
++)
5262 if (ref
->u
.ar
.dimen_type
[i
] == DIMEN_RANGE
5263 || ref
->u
.ar
.dimen_type
[i
] == DIMEN_VECTOR
)
5273 expression_shape (e
);
5278 add_caf_get_intrinsic (gfc_expr
*e
)
5280 gfc_expr
*wrapper
, *tmp_expr
;
5284 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
5285 if (ref
->type
== REF_ARRAY
&& ref
->u
.ar
.codimen
> 0)
5290 for (n
= ref
->u
.ar
.dimen
; n
< ref
->u
.ar
.dimen
+ ref
->u
.ar
.codimen
; n
++)
5291 if (ref
->u
.ar
.dimen_type
[n
] != DIMEN_ELEMENT
)
5294 tmp_expr
= XCNEW (gfc_expr
);
5296 wrapper
= gfc_build_intrinsic_call (gfc_current_ns
, GFC_ISYM_CAF_GET
,
5297 "caf_get", tmp_expr
->where
, 1, tmp_expr
);
5298 wrapper
->ts
= e
->ts
;
5299 wrapper
->rank
= e
->rank
;
5301 wrapper
->shape
= gfc_copy_shape (e
->shape
, e
->rank
);
5308 remove_caf_get_intrinsic (gfc_expr
*e
)
5310 gcc_assert (e
->expr_type
== EXPR_FUNCTION
&& e
->value
.function
.isym
5311 && e
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
);
5312 gfc_expr
*e2
= e
->value
.function
.actual
->expr
;
5313 e
->value
.function
.actual
->expr
= NULL
;
5314 gfc_free_actual_arglist (e
->value
.function
.actual
);
5315 gfc_free_shape (&e
->shape
, e
->rank
);
5321 /* Resolve a variable expression. */
5324 resolve_variable (gfc_expr
*e
)
5331 if (e
->symtree
== NULL
)
5333 sym
= e
->symtree
->n
.sym
;
5335 /* Use same check as for TYPE(*) below; this check has to be before TYPE(*)
5336 as ts.type is set to BT_ASSUMED in resolve_symbol. */
5337 if (sym
->attr
.ext_attr
& (1 << EXT_ATTR_NO_ARG_CHECK
))
5339 if (!actual_arg
|| inquiry_argument
)
5341 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute may only "
5342 "be used as actual argument", sym
->name
, &e
->where
);
5346 /* TS 29113, 407b. */
5347 else if (e
->ts
.type
== BT_ASSUMED
)
5351 gfc_error ("Assumed-type variable %s at %L may only be used "
5352 "as actual argument", sym
->name
, &e
->where
);
5355 else if (inquiry_argument
&& !first_actual_arg
)
5357 /* FIXME: It doesn't work reliably as inquiry_argument is not set
5358 for all inquiry functions in resolve_function; the reason is
5359 that the function-name resolution happens too late in that
5361 gfc_error ("Assumed-type variable %s at %L as actual argument to "
5362 "an inquiry function shall be the first argument",
5363 sym
->name
, &e
->where
);
5367 /* TS 29113, C535b. */
5368 else if ((sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
5369 && CLASS_DATA (sym
)->as
5370 && CLASS_DATA (sym
)->as
->type
== AS_ASSUMED_RANK
)
5371 || (sym
->ts
.type
!= BT_CLASS
&& sym
->as
5372 && sym
->as
->type
== AS_ASSUMED_RANK
))
5376 gfc_error ("Assumed-rank variable %s at %L may only be used as "
5377 "actual argument", sym
->name
, &e
->where
);
5380 else if (inquiry_argument
&& !first_actual_arg
)
5382 /* FIXME: It doesn't work reliably as inquiry_argument is not set
5383 for all inquiry functions in resolve_function; the reason is
5384 that the function-name resolution happens too late in that
5386 gfc_error ("Assumed-rank variable %s at %L as actual argument "
5387 "to an inquiry function shall be the first argument",
5388 sym
->name
, &e
->where
);
5393 if ((sym
->attr
.ext_attr
& (1 << EXT_ATTR_NO_ARG_CHECK
)) && e
->ref
5394 && !(e
->ref
->type
== REF_ARRAY
&& e
->ref
->u
.ar
.type
== AR_FULL
5395 && e
->ref
->next
== NULL
))
5397 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute shall not have "
5398 "a subobject reference", sym
->name
, &e
->ref
->u
.ar
.where
);
5401 /* TS 29113, 407b. */
5402 else if (e
->ts
.type
== BT_ASSUMED
&& e
->ref
5403 && !(e
->ref
->type
== REF_ARRAY
&& e
->ref
->u
.ar
.type
== AR_FULL
5404 && e
->ref
->next
== NULL
))
5406 gfc_error ("Assumed-type variable %s at %L shall not have a subobject "
5407 "reference", sym
->name
, &e
->ref
->u
.ar
.where
);
5411 /* TS 29113, C535b. */
5412 if (((sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
5413 && CLASS_DATA (sym
)->as
5414 && CLASS_DATA (sym
)->as
->type
== AS_ASSUMED_RANK
)
5415 || (sym
->ts
.type
!= BT_CLASS
&& sym
->as
5416 && sym
->as
->type
== AS_ASSUMED_RANK
))
5418 && !(e
->ref
->type
== REF_ARRAY
&& e
->ref
->u
.ar
.type
== AR_FULL
5419 && e
->ref
->next
== NULL
))
5421 gfc_error ("Assumed-rank variable %s at %L shall not have a subobject "
5422 "reference", sym
->name
, &e
->ref
->u
.ar
.where
);
5426 /* For variables that are used in an associate (target => object) where
5427 the object's basetype is array valued while the target is scalar,
5428 the ts' type of the component refs is still array valued, which
5429 can't be translated that way. */
5430 if (sym
->assoc
&& e
->rank
== 0 && e
->ref
&& sym
->ts
.type
== BT_CLASS
5431 && sym
->assoc
->target
&& sym
->assoc
->target
->ts
.type
== BT_CLASS
5432 && CLASS_DATA (sym
->assoc
->target
)->as
)
5434 gfc_ref
*ref
= e
->ref
;
5440 ref
->u
.c
.sym
= sym
->ts
.u
.derived
;
5441 /* Stop the loop. */
5451 /* If this is an associate-name, it may be parsed with an array reference
5452 in error even though the target is scalar. Fail directly in this case.
5453 TODO Understand why class scalar expressions must be excluded. */
5454 if (sym
->assoc
&& !(sym
->ts
.type
== BT_CLASS
&& e
->rank
== 0))
5456 if (sym
->ts
.type
== BT_CLASS
)
5457 gfc_fix_class_refs (e
);
5458 if (!sym
->attr
.dimension
&& e
->ref
&& e
->ref
->type
== REF_ARRAY
)
5460 else if (sym
->attr
.dimension
&& (!e
->ref
|| e
->ref
->type
!= REF_ARRAY
))
5462 /* This can happen because the parser did not detect that the
5463 associate name is an array and the expression had no array
5465 gfc_ref
*ref
= gfc_get_ref ();
5466 ref
->type
= REF_ARRAY
;
5467 ref
->u
.ar
= *gfc_get_array_ref();
5468 ref
->u
.ar
.type
= AR_FULL
;
5471 ref
->u
.ar
.as
= sym
->as
;
5472 ref
->u
.ar
.dimen
= sym
->as
->rank
;
5480 if (sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
->attr
.generic
)
5481 sym
->ts
.u
.derived
= gfc_find_dt_in_generic (sym
->ts
.u
.derived
);
5483 /* On the other hand, the parser may not have known this is an array;
5484 in this case, we have to add a FULL reference. */
5485 if (sym
->assoc
&& sym
->attr
.dimension
&& !e
->ref
)
5487 e
->ref
= gfc_get_ref ();
5488 e
->ref
->type
= REF_ARRAY
;
5489 e
->ref
->u
.ar
.type
= AR_FULL
;
5490 e
->ref
->u
.ar
.dimen
= 0;
5493 /* Like above, but for class types, where the checking whether an array
5494 ref is present is more complicated. Furthermore make sure not to add
5495 the full array ref to _vptr or _len refs. */
5496 if (sym
->assoc
&& sym
->ts
.type
== BT_CLASS
5497 && CLASS_DATA (sym
)->attr
.dimension
5498 && (e
->ts
.type
!= BT_DERIVED
|| !e
->ts
.u
.derived
->attr
.vtype
))
5500 gfc_ref
*ref
, *newref
;
5502 newref
= gfc_get_ref ();
5503 newref
->type
= REF_ARRAY
;
5504 newref
->u
.ar
.type
= AR_FULL
;
5505 newref
->u
.ar
.dimen
= 0;
5506 /* Because this is an associate var and the first ref either is a ref to
5507 the _data component or not, no traversal of the ref chain is
5508 needed. The array ref needs to be inserted after the _data ref,
5509 or when that is not present, which may happend for polymorphic
5510 types, then at the first position. */
5514 else if (ref
->type
== REF_COMPONENT
5515 && strcmp ("_data", ref
->u
.c
.component
->name
) == 0)
5517 if (!ref
->next
|| ref
->next
->type
!= REF_ARRAY
)
5519 newref
->next
= ref
->next
;
5523 /* Array ref present already. */
5524 gfc_free_ref_list (newref
);
5526 else if (ref
->type
== REF_ARRAY
)
5527 /* Array ref present already. */
5528 gfc_free_ref_list (newref
);
5536 if (e
->ref
&& !resolve_ref (e
))
5539 if (sym
->attr
.flavor
== FL_PROCEDURE
5540 && (!sym
->attr
.function
5541 || (sym
->attr
.function
&& sym
->result
5542 && sym
->result
->attr
.proc_pointer
5543 && !sym
->result
->attr
.function
)))
5545 e
->ts
.type
= BT_PROCEDURE
;
5546 goto resolve_procedure
;
5549 if (sym
->ts
.type
!= BT_UNKNOWN
)
5550 gfc_variable_attr (e
, &e
->ts
);
5551 else if (sym
->attr
.flavor
== FL_PROCEDURE
5552 && sym
->attr
.function
&& sym
->result
5553 && sym
->result
->ts
.type
!= BT_UNKNOWN
5554 && sym
->result
->attr
.proc_pointer
)
5555 e
->ts
= sym
->result
->ts
;
5558 /* Must be a simple variable reference. */
5559 if (!gfc_set_default_type (sym
, 1, sym
->ns
))
5564 if (check_assumed_size_reference (sym
, e
))
5567 /* Deal with forward references to entries during gfc_resolve_code, to
5568 satisfy, at least partially, 12.5.2.5. */
5569 if (gfc_current_ns
->entries
5570 && current_entry_id
== sym
->entry_id
5573 && cs_base
->current
->op
!= EXEC_ENTRY
)
5575 gfc_entry_list
*entry
;
5576 gfc_formal_arglist
*formal
;
5578 bool seen
, saved_specification_expr
;
5580 /* If the symbol is a dummy... */
5581 if (sym
->attr
.dummy
&& sym
->ns
== gfc_current_ns
)
5583 entry
= gfc_current_ns
->entries
;
5586 /* ...test if the symbol is a parameter of previous entries. */
5587 for (; entry
&& entry
->id
<= current_entry_id
; entry
= entry
->next
)
5588 for (formal
= entry
->sym
->formal
; formal
; formal
= formal
->next
)
5590 if (formal
->sym
&& sym
->name
== formal
->sym
->name
)
5597 /* If it has not been seen as a dummy, this is an error. */
5600 if (specification_expr
)
5601 gfc_error ("Variable %qs, used in a specification expression"
5602 ", is referenced at %L before the ENTRY statement "
5603 "in which it is a parameter",
5604 sym
->name
, &cs_base
->current
->loc
);
5606 gfc_error ("Variable %qs is used at %L before the ENTRY "
5607 "statement in which it is a parameter",
5608 sym
->name
, &cs_base
->current
->loc
);
5613 /* Now do the same check on the specification expressions. */
5614 saved_specification_expr
= specification_expr
;
5615 specification_expr
= true;
5616 if (sym
->ts
.type
== BT_CHARACTER
5617 && !gfc_resolve_expr (sym
->ts
.u
.cl
->length
))
5621 for (n
= 0; n
< sym
->as
->rank
; n
++)
5623 if (!gfc_resolve_expr (sym
->as
->lower
[n
]))
5625 if (!gfc_resolve_expr (sym
->as
->upper
[n
]))
5628 specification_expr
= saved_specification_expr
;
5631 /* Update the symbol's entry level. */
5632 sym
->entry_id
= current_entry_id
+ 1;
5635 /* If a symbol has been host_associated mark it. This is used latter,
5636 to identify if aliasing is possible via host association. */
5637 if (sym
->attr
.flavor
== FL_VARIABLE
5638 && gfc_current_ns
->parent
5639 && (gfc_current_ns
->parent
== sym
->ns
5640 || (gfc_current_ns
->parent
->parent
5641 && gfc_current_ns
->parent
->parent
== sym
->ns
)))
5642 sym
->attr
.host_assoc
= 1;
5644 if (gfc_current_ns
->proc_name
5645 && sym
->attr
.dimension
5646 && (sym
->ns
!= gfc_current_ns
5647 || sym
->attr
.use_assoc
5648 || sym
->attr
.in_common
))
5649 gfc_current_ns
->proc_name
->attr
.array_outer_dependency
= 1;
5652 if (t
&& !resolve_procedure_expression (e
))
5655 /* F2008, C617 and C1229. */
5656 if (!inquiry_argument
&& (e
->ts
.type
== BT_CLASS
|| e
->ts
.type
== BT_DERIVED
)
5657 && gfc_is_coindexed (e
))
5659 gfc_ref
*ref
, *ref2
= NULL
;
5661 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
5663 if (ref
->type
== REF_COMPONENT
)
5665 if (ref
->type
== REF_ARRAY
&& ref
->u
.ar
.codimen
> 0)
5669 for ( ; ref
; ref
= ref
->next
)
5670 if (ref
->type
== REF_COMPONENT
)
5673 /* Expression itself is not coindexed object. */
5674 if (ref
&& e
->ts
.type
== BT_CLASS
)
5676 gfc_error ("Polymorphic subobject of coindexed object at %L",
5681 /* Expression itself is coindexed object. */
5685 c
= ref2
? ref2
->u
.c
.component
: e
->symtree
->n
.sym
->components
;
5686 for ( ; c
; c
= c
->next
)
5687 if (c
->attr
.allocatable
&& c
->ts
.type
== BT_CLASS
)
5689 gfc_error ("Coindexed object with polymorphic allocatable "
5690 "subcomponent at %L", &e
->where
);
5698 expression_rank (e
);
5700 if (t
&& flag_coarray
== GFC_FCOARRAY_LIB
&& gfc_is_coindexed (e
))
5701 add_caf_get_intrinsic (e
);
5703 /* Simplify cases where access to a parameter array results in a
5704 single constant. Suppress errors since those will have been
5705 issued before, as warnings. */
5706 if (e
->rank
== 0 && sym
->as
&& sym
->attr
.flavor
== FL_PARAMETER
)
5708 gfc_push_suppress_errors ();
5709 gfc_simplify_expr (e
, 1);
5710 gfc_pop_suppress_errors ();
5717 /* Checks to see that the correct symbol has been host associated.
5718 The only situation where this arises is that in which a twice
5719 contained function is parsed after the host association is made.
5720 Therefore, on detecting this, change the symbol in the expression
5721 and convert the array reference into an actual arglist if the old
5722 symbol is a variable. */
5724 check_host_association (gfc_expr
*e
)
5726 gfc_symbol
*sym
, *old_sym
;
5730 gfc_actual_arglist
*arg
, *tail
= NULL
;
5731 bool retval
= e
->expr_type
== EXPR_FUNCTION
;
5733 /* If the expression is the result of substitution in
5734 interface.c(gfc_extend_expr) because there is no way in
5735 which the host association can be wrong. */
5736 if (e
->symtree
== NULL
5737 || e
->symtree
->n
.sym
== NULL
5738 || e
->user_operator
)
5741 old_sym
= e
->symtree
->n
.sym
;
5743 if (gfc_current_ns
->parent
5744 && old_sym
->ns
!= gfc_current_ns
)
5746 /* Use the 'USE' name so that renamed module symbols are
5747 correctly handled. */
5748 gfc_find_symbol (e
->symtree
->name
, gfc_current_ns
, 1, &sym
);
5750 if (sym
&& old_sym
!= sym
5751 && sym
->ts
.type
== old_sym
->ts
.type
5752 && sym
->attr
.flavor
== FL_PROCEDURE
5753 && sym
->attr
.contained
)
5755 /* Clear the shape, since it might not be valid. */
5756 gfc_free_shape (&e
->shape
, e
->rank
);
5758 /* Give the expression the right symtree! */
5759 gfc_find_sym_tree (e
->symtree
->name
, NULL
, 1, &st
);
5760 gcc_assert (st
!= NULL
);
5762 if (old_sym
->attr
.flavor
== FL_PROCEDURE
5763 || e
->expr_type
== EXPR_FUNCTION
)
5765 /* Original was function so point to the new symbol, since
5766 the actual argument list is already attached to the
5768 e
->value
.function
.esym
= NULL
;
5773 /* Original was variable so convert array references into
5774 an actual arglist. This does not need any checking now
5775 since resolve_function will take care of it. */
5776 e
->value
.function
.actual
= NULL
;
5777 e
->expr_type
= EXPR_FUNCTION
;
5780 /* Ambiguity will not arise if the array reference is not
5781 the last reference. */
5782 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
5783 if (ref
->type
== REF_ARRAY
&& ref
->next
== NULL
)
5786 gcc_assert (ref
->type
== REF_ARRAY
);
5788 /* Grab the start expressions from the array ref and
5789 copy them into actual arguments. */
5790 for (n
= 0; n
< ref
->u
.ar
.dimen
; n
++)
5792 arg
= gfc_get_actual_arglist ();
5793 arg
->expr
= gfc_copy_expr (ref
->u
.ar
.start
[n
]);
5794 if (e
->value
.function
.actual
== NULL
)
5795 tail
= e
->value
.function
.actual
= arg
;
5803 /* Dump the reference list and set the rank. */
5804 gfc_free_ref_list (e
->ref
);
5806 e
->rank
= sym
->as
? sym
->as
->rank
: 0;
5809 gfc_resolve_expr (e
);
5813 /* This might have changed! */
5814 return e
->expr_type
== EXPR_FUNCTION
;
5819 gfc_resolve_character_operator (gfc_expr
*e
)
5821 gfc_expr
*op1
= e
->value
.op
.op1
;
5822 gfc_expr
*op2
= e
->value
.op
.op2
;
5823 gfc_expr
*e1
= NULL
;
5824 gfc_expr
*e2
= NULL
;
5826 gcc_assert (e
->value
.op
.op
== INTRINSIC_CONCAT
);
5828 if (op1
->ts
.u
.cl
&& op1
->ts
.u
.cl
->length
)
5829 e1
= gfc_copy_expr (op1
->ts
.u
.cl
->length
);
5830 else if (op1
->expr_type
== EXPR_CONSTANT
)
5831 e1
= gfc_get_int_expr (gfc_charlen_int_kind
, NULL
,
5832 op1
->value
.character
.length
);
5834 if (op2
->ts
.u
.cl
&& op2
->ts
.u
.cl
->length
)
5835 e2
= gfc_copy_expr (op2
->ts
.u
.cl
->length
);
5836 else if (op2
->expr_type
== EXPR_CONSTANT
)
5837 e2
= gfc_get_int_expr (gfc_charlen_int_kind
, NULL
,
5838 op2
->value
.character
.length
);
5840 e
->ts
.u
.cl
= gfc_new_charlen (gfc_current_ns
, NULL
);
5850 e
->ts
.u
.cl
->length
= gfc_add (e1
, e2
);
5851 e
->ts
.u
.cl
->length
->ts
.type
= BT_INTEGER
;
5852 e
->ts
.u
.cl
->length
->ts
.kind
= gfc_charlen_int_kind
;
5853 gfc_simplify_expr (e
->ts
.u
.cl
->length
, 0);
5854 gfc_resolve_expr (e
->ts
.u
.cl
->length
);
5860 /* Ensure that an character expression has a charlen and, if possible, a
5861 length expression. */
5864 fixup_charlen (gfc_expr
*e
)
5866 /* The cases fall through so that changes in expression type and the need
5867 for multiple fixes are picked up. In all circumstances, a charlen should
5868 be available for the middle end to hang a backend_decl on. */
5869 switch (e
->expr_type
)
5872 gfc_resolve_character_operator (e
);
5876 if (e
->expr_type
== EXPR_ARRAY
)
5877 gfc_resolve_character_array_constructor (e
);
5880 case EXPR_SUBSTRING
:
5881 if (!e
->ts
.u
.cl
&& e
->ref
)
5882 gfc_resolve_substring_charlen (e
);
5887 e
->ts
.u
.cl
= gfc_new_charlen (gfc_current_ns
, NULL
);
5894 /* Update an actual argument to include the passed-object for type-bound
5895 procedures at the right position. */
5897 static gfc_actual_arglist
*
5898 update_arglist_pass (gfc_actual_arglist
* lst
, gfc_expr
* po
, unsigned argpos
,
5901 gcc_assert (argpos
> 0);
5905 gfc_actual_arglist
* result
;
5907 result
= gfc_get_actual_arglist ();
5911 result
->name
= name
;
5917 lst
->next
= update_arglist_pass (lst
->next
, po
, argpos
- 1, name
);
5919 lst
= update_arglist_pass (NULL
, po
, argpos
- 1, name
);
5924 /* Extract the passed-object from an EXPR_COMPCALL (a copy of it). */
5927 extract_compcall_passed_object (gfc_expr
* e
)
5931 gcc_assert (e
->expr_type
== EXPR_COMPCALL
);
5933 if (e
->value
.compcall
.base_object
)
5934 po
= gfc_copy_expr (e
->value
.compcall
.base_object
);
5937 po
= gfc_get_expr ();
5938 po
->expr_type
= EXPR_VARIABLE
;
5939 po
->symtree
= e
->symtree
;
5940 po
->ref
= gfc_copy_ref (e
->ref
);
5941 po
->where
= e
->where
;
5944 if (!gfc_resolve_expr (po
))
5951 /* Update the arglist of an EXPR_COMPCALL expression to include the
5955 update_compcall_arglist (gfc_expr
* e
)
5958 gfc_typebound_proc
* tbp
;
5960 tbp
= e
->value
.compcall
.tbp
;
5965 po
= extract_compcall_passed_object (e
);
5969 if (tbp
->nopass
|| e
->value
.compcall
.ignore_pass
)
5975 if (tbp
->pass_arg_num
<= 0)
5978 e
->value
.compcall
.actual
= update_arglist_pass (e
->value
.compcall
.actual
, po
,
5986 /* Extract the passed object from a PPC call (a copy of it). */
5989 extract_ppc_passed_object (gfc_expr
*e
)
5994 po
= gfc_get_expr ();
5995 po
->expr_type
= EXPR_VARIABLE
;
5996 po
->symtree
= e
->symtree
;
5997 po
->ref
= gfc_copy_ref (e
->ref
);
5998 po
->where
= e
->where
;
6000 /* Remove PPC reference. */
6002 while ((*ref
)->next
)
6003 ref
= &(*ref
)->next
;
6004 gfc_free_ref_list (*ref
);
6007 if (!gfc_resolve_expr (po
))
6014 /* Update the actual arglist of a procedure pointer component to include the
6018 update_ppc_arglist (gfc_expr
* e
)
6022 gfc_typebound_proc
* tb
;
6024 ppc
= gfc_get_proc_ptr_comp (e
);
6032 else if (tb
->nopass
)
6035 po
= extract_ppc_passed_object (e
);
6042 gfc_error ("Passed-object at %L must be scalar", &e
->where
);
6047 if (po
->ts
.type
== BT_DERIVED
&& po
->ts
.u
.derived
->attr
.abstract
)
6049 gfc_error ("Base object for procedure-pointer component call at %L is of"
6050 " ABSTRACT type %qs", &e
->where
, po
->ts
.u
.derived
->name
);
6054 gcc_assert (tb
->pass_arg_num
> 0);
6055 e
->value
.compcall
.actual
= update_arglist_pass (e
->value
.compcall
.actual
, po
,
6063 /* Check that the object a TBP is called on is valid, i.e. it must not be
6064 of ABSTRACT type (as in subobject%abstract_parent%tbp()). */
6067 check_typebound_baseobject (gfc_expr
* e
)
6070 bool return_value
= false;
6072 base
= extract_compcall_passed_object (e
);
6076 gcc_assert (base
->ts
.type
== BT_DERIVED
|| base
->ts
.type
== BT_CLASS
);
6078 if (base
->ts
.type
== BT_CLASS
&& !gfc_expr_attr (base
).class_ok
)
6082 if (base
->ts
.type
== BT_DERIVED
&& base
->ts
.u
.derived
->attr
.abstract
)
6084 gfc_error ("Base object for type-bound procedure call at %L is of"
6085 " ABSTRACT type %qs", &e
->where
, base
->ts
.u
.derived
->name
);
6089 /* F08:C1230. If the procedure called is NOPASS,
6090 the base object must be scalar. */
6091 if (e
->value
.compcall
.tbp
->nopass
&& base
->rank
!= 0)
6093 gfc_error ("Base object for NOPASS type-bound procedure call at %L must"
6094 " be scalar", &e
->where
);
6098 return_value
= true;
6101 gfc_free_expr (base
);
6102 return return_value
;
6106 /* Resolve a call to a type-bound procedure, either function or subroutine,
6107 statically from the data in an EXPR_COMPCALL expression. The adapted
6108 arglist and the target-procedure symtree are returned. */
6111 resolve_typebound_static (gfc_expr
* e
, gfc_symtree
** target
,
6112 gfc_actual_arglist
** actual
)
6114 gcc_assert (e
->expr_type
== EXPR_COMPCALL
);
6115 gcc_assert (!e
->value
.compcall
.tbp
->is_generic
);
6117 /* Update the actual arglist for PASS. */
6118 if (!update_compcall_arglist (e
))
6121 *actual
= e
->value
.compcall
.actual
;
6122 *target
= e
->value
.compcall
.tbp
->u
.specific
;
6124 gfc_free_ref_list (e
->ref
);
6126 e
->value
.compcall
.actual
= NULL
;
6128 /* If we find a deferred typebound procedure, check for derived types
6129 that an overriding typebound procedure has not been missed. */
6130 if (e
->value
.compcall
.name
6131 && !e
->value
.compcall
.tbp
->non_overridable
6132 && e
->value
.compcall
.base_object
6133 && e
->value
.compcall
.base_object
->ts
.type
== BT_DERIVED
)
6136 gfc_symbol
*derived
;
6138 /* Use the derived type of the base_object. */
6139 derived
= e
->value
.compcall
.base_object
->ts
.u
.derived
;
6142 /* If necessary, go through the inheritance chain. */
6143 while (!st
&& derived
)
6145 /* Look for the typebound procedure 'name'. */
6146 if (derived
->f2k_derived
&& derived
->f2k_derived
->tb_sym_root
)
6147 st
= gfc_find_symtree (derived
->f2k_derived
->tb_sym_root
,
6148 e
->value
.compcall
.name
);
6150 derived
= gfc_get_derived_super_type (derived
);
6153 /* Now find the specific name in the derived type namespace. */
6154 if (st
&& st
->n
.tb
&& st
->n
.tb
->u
.specific
)
6155 gfc_find_sym_tree (st
->n
.tb
->u
.specific
->name
,
6156 derived
->ns
, 1, &st
);
6164 /* Get the ultimate declared type from an expression. In addition,
6165 return the last class/derived type reference and the copy of the
6166 reference list. If check_types is set true, derived types are
6167 identified as well as class references. */
6169 get_declared_from_expr (gfc_ref
**class_ref
, gfc_ref
**new_ref
,
6170 gfc_expr
*e
, bool check_types
)
6172 gfc_symbol
*declared
;
6179 *new_ref
= gfc_copy_ref (e
->ref
);
6181 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
6183 if (ref
->type
!= REF_COMPONENT
)
6186 if ((ref
->u
.c
.component
->ts
.type
== BT_CLASS
6187 || (check_types
&& gfc_bt_struct (ref
->u
.c
.component
->ts
.type
)))
6188 && ref
->u
.c
.component
->attr
.flavor
!= FL_PROCEDURE
)
6190 declared
= ref
->u
.c
.component
->ts
.u
.derived
;
6196 if (declared
== NULL
)
6197 declared
= e
->symtree
->n
.sym
->ts
.u
.derived
;
6203 /* Given an EXPR_COMPCALL calling a GENERIC typebound procedure, figure out
6204 which of the specific bindings (if any) matches the arglist and transform
6205 the expression into a call of that binding. */
6208 resolve_typebound_generic_call (gfc_expr
* e
, const char **name
)
6210 gfc_typebound_proc
* genproc
;
6211 const char* genname
;
6213 gfc_symbol
*derived
;
6215 gcc_assert (e
->expr_type
== EXPR_COMPCALL
);
6216 genname
= e
->value
.compcall
.name
;
6217 genproc
= e
->value
.compcall
.tbp
;
6219 if (!genproc
->is_generic
)
6222 /* Try the bindings on this type and in the inheritance hierarchy. */
6223 for (; genproc
; genproc
= genproc
->overridden
)
6227 gcc_assert (genproc
->is_generic
);
6228 for (g
= genproc
->u
.generic
; g
; g
= g
->next
)
6231 gfc_actual_arglist
* args
;
6234 gcc_assert (g
->specific
);
6236 if (g
->specific
->error
)
6239 target
= g
->specific
->u
.specific
->n
.sym
;
6241 /* Get the right arglist by handling PASS/NOPASS. */
6242 args
= gfc_copy_actual_arglist (e
->value
.compcall
.actual
);
6243 if (!g
->specific
->nopass
)
6246 po
= extract_compcall_passed_object (e
);
6249 gfc_free_actual_arglist (args
);
6253 gcc_assert (g
->specific
->pass_arg_num
> 0);
6254 gcc_assert (!g
->specific
->error
);
6255 args
= update_arglist_pass (args
, po
, g
->specific
->pass_arg_num
,
6256 g
->specific
->pass_arg
);
6258 resolve_actual_arglist (args
, target
->attr
.proc
,
6259 is_external_proc (target
)
6260 && gfc_sym_get_dummy_args (target
) == NULL
);
6262 /* Check if this arglist matches the formal. */
6263 matches
= gfc_arglist_matches_symbol (&args
, target
);
6265 /* Clean up and break out of the loop if we've found it. */
6266 gfc_free_actual_arglist (args
);
6269 e
->value
.compcall
.tbp
= g
->specific
;
6270 genname
= g
->specific_st
->name
;
6271 /* Pass along the name for CLASS methods, where the vtab
6272 procedure pointer component has to be referenced. */
6280 /* Nothing matching found! */
6281 gfc_error ("Found no matching specific binding for the call to the GENERIC"
6282 " %qs at %L", genname
, &e
->where
);
6286 /* Make sure that we have the right specific instance for the name. */
6287 derived
= get_declared_from_expr (NULL
, NULL
, e
, true);
6289 st
= gfc_find_typebound_proc (derived
, NULL
, genname
, true, &e
->where
);
6291 e
->value
.compcall
.tbp
= st
->n
.tb
;
6297 /* Resolve a call to a type-bound subroutine. */
6300 resolve_typebound_call (gfc_code
* c
, const char **name
, bool *overridable
)
6302 gfc_actual_arglist
* newactual
;
6303 gfc_symtree
* target
;
6305 /* Check that's really a SUBROUTINE. */
6306 if (!c
->expr1
->value
.compcall
.tbp
->subroutine
)
6308 if (!c
->expr1
->value
.compcall
.tbp
->is_generic
6309 && c
->expr1
->value
.compcall
.tbp
->u
.specific
6310 && c
->expr1
->value
.compcall
.tbp
->u
.specific
->n
.sym
6311 && c
->expr1
->value
.compcall
.tbp
->u
.specific
->n
.sym
->attr
.subroutine
)
6312 c
->expr1
->value
.compcall
.tbp
->subroutine
= 1;
6315 gfc_error ("%qs at %L should be a SUBROUTINE",
6316 c
->expr1
->value
.compcall
.name
, &c
->loc
);
6321 if (!check_typebound_baseobject (c
->expr1
))
6324 /* Pass along the name for CLASS methods, where the vtab
6325 procedure pointer component has to be referenced. */
6327 *name
= c
->expr1
->value
.compcall
.name
;
6329 if (!resolve_typebound_generic_call (c
->expr1
, name
))
6332 /* Pass along the NON_OVERRIDABLE attribute of the specific TBP. */
6334 *overridable
= !c
->expr1
->value
.compcall
.tbp
->non_overridable
;
6336 /* Transform into an ordinary EXEC_CALL for now. */
6338 if (!resolve_typebound_static (c
->expr1
, &target
, &newactual
))
6341 c
->ext
.actual
= newactual
;
6342 c
->symtree
= target
;
6343 c
->op
= (c
->expr1
->value
.compcall
.assign
? EXEC_ASSIGN_CALL
: EXEC_CALL
);
6345 gcc_assert (!c
->expr1
->ref
&& !c
->expr1
->value
.compcall
.actual
);
6347 gfc_free_expr (c
->expr1
);
6348 c
->expr1
= gfc_get_expr ();
6349 c
->expr1
->expr_type
= EXPR_FUNCTION
;
6350 c
->expr1
->symtree
= target
;
6351 c
->expr1
->where
= c
->loc
;
6353 return resolve_call (c
);
6357 /* Resolve a component-call expression. */
6359 resolve_compcall (gfc_expr
* e
, const char **name
)
6361 gfc_actual_arglist
* newactual
;
6362 gfc_symtree
* target
;
6364 /* Check that's really a FUNCTION. */
6365 if (!e
->value
.compcall
.tbp
->function
)
6367 gfc_error ("%qs at %L should be a FUNCTION",
6368 e
->value
.compcall
.name
, &e
->where
);
6372 /* These must not be assign-calls! */
6373 gcc_assert (!e
->value
.compcall
.assign
);
6375 if (!check_typebound_baseobject (e
))
6378 /* Pass along the name for CLASS methods, where the vtab
6379 procedure pointer component has to be referenced. */
6381 *name
= e
->value
.compcall
.name
;
6383 if (!resolve_typebound_generic_call (e
, name
))
6385 gcc_assert (!e
->value
.compcall
.tbp
->is_generic
);
6387 /* Take the rank from the function's symbol. */
6388 if (e
->value
.compcall
.tbp
->u
.specific
->n
.sym
->as
)
6389 e
->rank
= e
->value
.compcall
.tbp
->u
.specific
->n
.sym
->as
->rank
;
6391 /* For now, we simply transform it into an EXPR_FUNCTION call with the same
6392 arglist to the TBP's binding target. */
6394 if (!resolve_typebound_static (e
, &target
, &newactual
))
6397 e
->value
.function
.actual
= newactual
;
6398 e
->value
.function
.name
= NULL
;
6399 e
->value
.function
.esym
= target
->n
.sym
;
6400 e
->value
.function
.isym
= NULL
;
6401 e
->symtree
= target
;
6402 e
->ts
= target
->n
.sym
->ts
;
6403 e
->expr_type
= EXPR_FUNCTION
;
6405 /* Resolution is not necessary if this is a class subroutine; this
6406 function only has to identify the specific proc. Resolution of
6407 the call will be done next in resolve_typebound_call. */
6408 return gfc_resolve_expr (e
);
6412 static bool resolve_fl_derived (gfc_symbol
*sym
);
6415 /* Resolve a typebound function, or 'method'. First separate all
6416 the non-CLASS references by calling resolve_compcall directly. */
6419 resolve_typebound_function (gfc_expr
* e
)
6421 gfc_symbol
*declared
;
6433 /* Deal with typebound operators for CLASS objects. */
6434 expr
= e
->value
.compcall
.base_object
;
6435 overridable
= !e
->value
.compcall
.tbp
->non_overridable
;
6436 if (expr
&& expr
->ts
.type
== BT_CLASS
&& e
->value
.compcall
.name
)
6438 /* If the base_object is not a variable, the corresponding actual
6439 argument expression must be stored in e->base_expression so
6440 that the corresponding tree temporary can be used as the base
6441 object in gfc_conv_procedure_call. */
6442 if (expr
->expr_type
!= EXPR_VARIABLE
)
6444 gfc_actual_arglist
*args
;
6446 for (args
= e
->value
.function
.actual
; args
; args
= args
->next
)
6448 if (expr
== args
->expr
)
6453 /* Since the typebound operators are generic, we have to ensure
6454 that any delays in resolution are corrected and that the vtab
6457 declared
= ts
.u
.derived
;
6458 c
= gfc_find_component (declared
, "_vptr", true, true, NULL
);
6459 if (c
->ts
.u
.derived
== NULL
)
6460 c
->ts
.u
.derived
= gfc_find_derived_vtab (declared
);
6462 if (!resolve_compcall (e
, &name
))
6465 /* Use the generic name if it is there. */
6466 name
= name
? name
: e
->value
.function
.esym
->name
;
6467 e
->symtree
= expr
->symtree
;
6468 e
->ref
= gfc_copy_ref (expr
->ref
);
6469 get_declared_from_expr (&class_ref
, NULL
, e
, false);
6471 /* Trim away the extraneous references that emerge from nested
6472 use of interface.c (extend_expr). */
6473 if (class_ref
&& class_ref
->next
)
6475 gfc_free_ref_list (class_ref
->next
);
6476 class_ref
->next
= NULL
;
6478 else if (e
->ref
&& !class_ref
&& expr
->ts
.type
!= BT_CLASS
)
6480 gfc_free_ref_list (e
->ref
);
6484 gfc_add_vptr_component (e
);
6485 gfc_add_component_ref (e
, name
);
6486 e
->value
.function
.esym
= NULL
;
6487 if (expr
->expr_type
!= EXPR_VARIABLE
)
6488 e
->base_expr
= expr
;
6493 return resolve_compcall (e
, NULL
);
6495 if (!resolve_ref (e
))
6498 /* Get the CLASS declared type. */
6499 declared
= get_declared_from_expr (&class_ref
, &new_ref
, e
, true);
6501 if (!resolve_fl_derived (declared
))
6504 /* Weed out cases of the ultimate component being a derived type. */
6505 if ((class_ref
&& gfc_bt_struct (class_ref
->u
.c
.component
->ts
.type
))
6506 || (!class_ref
&& st
->n
.sym
->ts
.type
!= BT_CLASS
))
6508 gfc_free_ref_list (new_ref
);
6509 return resolve_compcall (e
, NULL
);
6512 c
= gfc_find_component (declared
, "_data", true, true, NULL
);
6513 declared
= c
->ts
.u
.derived
;
6515 /* Treat the call as if it is a typebound procedure, in order to roll
6516 out the correct name for the specific function. */
6517 if (!resolve_compcall (e
, &name
))
6519 gfc_free_ref_list (new_ref
);
6526 /* Convert the expression to a procedure pointer component call. */
6527 e
->value
.function
.esym
= NULL
;
6533 /* '_vptr' points to the vtab, which contains the procedure pointers. */
6534 gfc_add_vptr_component (e
);
6535 gfc_add_component_ref (e
, name
);
6537 /* Recover the typespec for the expression. This is really only
6538 necessary for generic procedures, where the additional call
6539 to gfc_add_component_ref seems to throw the collection of the
6540 correct typespec. */
6544 gfc_free_ref_list (new_ref
);
6549 /* Resolve a typebound subroutine, or 'method'. First separate all
6550 the non-CLASS references by calling resolve_typebound_call
6554 resolve_typebound_subroutine (gfc_code
*code
)
6556 gfc_symbol
*declared
;
6566 st
= code
->expr1
->symtree
;
6568 /* Deal with typebound operators for CLASS objects. */
6569 expr
= code
->expr1
->value
.compcall
.base_object
;
6570 overridable
= !code
->expr1
->value
.compcall
.tbp
->non_overridable
;
6571 if (expr
&& expr
->ts
.type
== BT_CLASS
&& code
->expr1
->value
.compcall
.name
)
6573 /* If the base_object is not a variable, the corresponding actual
6574 argument expression must be stored in e->base_expression so
6575 that the corresponding tree temporary can be used as the base
6576 object in gfc_conv_procedure_call. */
6577 if (expr
->expr_type
!= EXPR_VARIABLE
)
6579 gfc_actual_arglist
*args
;
6581 args
= code
->expr1
->value
.function
.actual
;
6582 for (; args
; args
= args
->next
)
6583 if (expr
== args
->expr
)
6587 /* Since the typebound operators are generic, we have to ensure
6588 that any delays in resolution are corrected and that the vtab
6590 declared
= expr
->ts
.u
.derived
;
6591 c
= gfc_find_component (declared
, "_vptr", true, true, NULL
);
6592 if (c
->ts
.u
.derived
== NULL
)
6593 c
->ts
.u
.derived
= gfc_find_derived_vtab (declared
);
6595 if (!resolve_typebound_call (code
, &name
, NULL
))
6598 /* Use the generic name if it is there. */
6599 name
= name
? name
: code
->expr1
->value
.function
.esym
->name
;
6600 code
->expr1
->symtree
= expr
->symtree
;
6601 code
->expr1
->ref
= gfc_copy_ref (expr
->ref
);
6603 /* Trim away the extraneous references that emerge from nested
6604 use of interface.c (extend_expr). */
6605 get_declared_from_expr (&class_ref
, NULL
, code
->expr1
, false);
6606 if (class_ref
&& class_ref
->next
)
6608 gfc_free_ref_list (class_ref
->next
);
6609 class_ref
->next
= NULL
;
6611 else if (code
->expr1
->ref
&& !class_ref
)
6613 gfc_free_ref_list (code
->expr1
->ref
);
6614 code
->expr1
->ref
= NULL
;
6617 /* Now use the procedure in the vtable. */
6618 gfc_add_vptr_component (code
->expr1
);
6619 gfc_add_component_ref (code
->expr1
, name
);
6620 code
->expr1
->value
.function
.esym
= NULL
;
6621 if (expr
->expr_type
!= EXPR_VARIABLE
)
6622 code
->expr1
->base_expr
= expr
;
6627 return resolve_typebound_call (code
, NULL
, NULL
);
6629 if (!resolve_ref (code
->expr1
))
6632 /* Get the CLASS declared type. */
6633 get_declared_from_expr (&class_ref
, &new_ref
, code
->expr1
, true);
6635 /* Weed out cases of the ultimate component being a derived type. */
6636 if ((class_ref
&& gfc_bt_struct (class_ref
->u
.c
.component
->ts
.type
))
6637 || (!class_ref
&& st
->n
.sym
->ts
.type
!= BT_CLASS
))
6639 gfc_free_ref_list (new_ref
);
6640 return resolve_typebound_call (code
, NULL
, NULL
);
6643 if (!resolve_typebound_call (code
, &name
, &overridable
))
6645 gfc_free_ref_list (new_ref
);
6648 ts
= code
->expr1
->ts
;
6652 /* Convert the expression to a procedure pointer component call. */
6653 code
->expr1
->value
.function
.esym
= NULL
;
6654 code
->expr1
->symtree
= st
;
6657 code
->expr1
->ref
= new_ref
;
6659 /* '_vptr' points to the vtab, which contains the procedure pointers. */
6660 gfc_add_vptr_component (code
->expr1
);
6661 gfc_add_component_ref (code
->expr1
, name
);
6663 /* Recover the typespec for the expression. This is really only
6664 necessary for generic procedures, where the additional call
6665 to gfc_add_component_ref seems to throw the collection of the
6666 correct typespec. */
6667 code
->expr1
->ts
= ts
;
6670 gfc_free_ref_list (new_ref
);
6676 /* Resolve a CALL to a Procedure Pointer Component (Subroutine). */
6679 resolve_ppc_call (gfc_code
* c
)
6681 gfc_component
*comp
;
6683 comp
= gfc_get_proc_ptr_comp (c
->expr1
);
6684 gcc_assert (comp
!= NULL
);
6686 c
->resolved_sym
= c
->expr1
->symtree
->n
.sym
;
6687 c
->expr1
->expr_type
= EXPR_VARIABLE
;
6689 if (!comp
->attr
.subroutine
)
6690 gfc_add_subroutine (&comp
->attr
, comp
->name
, &c
->expr1
->where
);
6692 if (!resolve_ref (c
->expr1
))
6695 if (!update_ppc_arglist (c
->expr1
))
6698 c
->ext
.actual
= c
->expr1
->value
.compcall
.actual
;
6700 if (!resolve_actual_arglist (c
->ext
.actual
, comp
->attr
.proc
,
6701 !(comp
->ts
.interface
6702 && comp
->ts
.interface
->formal
)))
6705 if (!pure_subroutine (comp
->ts
.interface
, comp
->name
, &c
->expr1
->where
))
6708 gfc_ppc_use (comp
, &c
->expr1
->value
.compcall
.actual
, &c
->expr1
->where
);
6714 /* Resolve a Function Call to a Procedure Pointer Component (Function). */
6717 resolve_expr_ppc (gfc_expr
* e
)
6719 gfc_component
*comp
;
6721 comp
= gfc_get_proc_ptr_comp (e
);
6722 gcc_assert (comp
!= NULL
);
6724 /* Convert to EXPR_FUNCTION. */
6725 e
->expr_type
= EXPR_FUNCTION
;
6726 e
->value
.function
.isym
= NULL
;
6727 e
->value
.function
.actual
= e
->value
.compcall
.actual
;
6729 if (comp
->as
!= NULL
)
6730 e
->rank
= comp
->as
->rank
;
6732 if (!comp
->attr
.function
)
6733 gfc_add_function (&comp
->attr
, comp
->name
, &e
->where
);
6735 if (!resolve_ref (e
))
6738 if (!resolve_actual_arglist (e
->value
.function
.actual
, comp
->attr
.proc
,
6739 !(comp
->ts
.interface
6740 && comp
->ts
.interface
->formal
)))
6743 if (!update_ppc_arglist (e
))
6746 if (!check_pure_function(e
))
6749 gfc_ppc_use (comp
, &e
->value
.compcall
.actual
, &e
->where
);
6756 gfc_is_expandable_expr (gfc_expr
*e
)
6758 gfc_constructor
*con
;
6760 if (e
->expr_type
== EXPR_ARRAY
)
6762 /* Traverse the constructor looking for variables that are flavor
6763 parameter. Parameters must be expanded since they are fully used at
6765 con
= gfc_constructor_first (e
->value
.constructor
);
6766 for (; con
; con
= gfc_constructor_next (con
))
6768 if (con
->expr
->expr_type
== EXPR_VARIABLE
6769 && con
->expr
->symtree
6770 && (con
->expr
->symtree
->n
.sym
->attr
.flavor
== FL_PARAMETER
6771 || con
->expr
->symtree
->n
.sym
->attr
.flavor
== FL_VARIABLE
))
6773 if (con
->expr
->expr_type
== EXPR_ARRAY
6774 && gfc_is_expandable_expr (con
->expr
))
6783 /* Sometimes variables in specification expressions of the result
6784 of module procedures in submodules wind up not being the 'real'
6785 dummy. Find this, if possible, in the namespace of the first
6789 fixup_unique_dummy (gfc_expr
*e
)
6791 gfc_symtree
*st
= NULL
;
6792 gfc_symbol
*s
= NULL
;
6794 if (e
->symtree
->n
.sym
->ns
->proc_name
6795 && e
->symtree
->n
.sym
->ns
->proc_name
->formal
)
6796 s
= e
->symtree
->n
.sym
->ns
->proc_name
->formal
->sym
;
6799 st
= gfc_find_symtree (s
->ns
->sym_root
, e
->symtree
->n
.sym
->name
);
6802 && st
->n
.sym
!= NULL
6803 && st
->n
.sym
->attr
.dummy
)
6807 /* Resolve an expression. That is, make sure that types of operands agree
6808 with their operators, intrinsic operators are converted to function calls
6809 for overloaded types and unresolved function references are resolved. */
6812 gfc_resolve_expr (gfc_expr
*e
)
6815 bool inquiry_save
, actual_arg_save
, first_actual_arg_save
;
6820 /* inquiry_argument only applies to variables. */
6821 inquiry_save
= inquiry_argument
;
6822 actual_arg_save
= actual_arg
;
6823 first_actual_arg_save
= first_actual_arg
;
6825 if (e
->expr_type
!= EXPR_VARIABLE
)
6827 inquiry_argument
= false;
6829 first_actual_arg
= false;
6831 else if (e
->symtree
!= NULL
6832 && *e
->symtree
->name
== '@'
6833 && e
->symtree
->n
.sym
->attr
.dummy
)
6835 /* Deal with submodule specification expressions that are not
6836 found to be referenced in module.c(read_cleanup). */
6837 fixup_unique_dummy (e
);
6840 switch (e
->expr_type
)
6843 t
= resolve_operator (e
);
6849 if (check_host_association (e
))
6850 t
= resolve_function (e
);
6852 t
= resolve_variable (e
);
6854 if (e
->ts
.type
== BT_CHARACTER
&& e
->ts
.u
.cl
== NULL
&& e
->ref
6855 && e
->ref
->type
!= REF_SUBSTRING
)
6856 gfc_resolve_substring_charlen (e
);
6861 t
= resolve_typebound_function (e
);
6864 case EXPR_SUBSTRING
:
6865 t
= resolve_ref (e
);
6874 t
= resolve_expr_ppc (e
);
6879 if (!resolve_ref (e
))
6882 t
= gfc_resolve_array_constructor (e
);
6883 /* Also try to expand a constructor. */
6886 expression_rank (e
);
6887 if (gfc_is_constant_expr (e
) || gfc_is_expandable_expr (e
))
6888 gfc_expand_constructor (e
, false);
6891 /* This provides the opportunity for the length of constructors with
6892 character valued function elements to propagate the string length
6893 to the expression. */
6894 if (t
&& e
->ts
.type
== BT_CHARACTER
)
6896 /* For efficiency, we call gfc_expand_constructor for BT_CHARACTER
6897 here rather then add a duplicate test for it above. */
6898 gfc_expand_constructor (e
, false);
6899 t
= gfc_resolve_character_array_constructor (e
);
6904 case EXPR_STRUCTURE
:
6905 t
= resolve_ref (e
);
6909 t
= resolve_structure_cons (e
, 0);
6913 t
= gfc_simplify_expr (e
, 0);
6917 gfc_internal_error ("gfc_resolve_expr(): Bad expression type");
6920 if (e
->ts
.type
== BT_CHARACTER
&& t
&& !e
->ts
.u
.cl
)
6923 inquiry_argument
= inquiry_save
;
6924 actual_arg
= actual_arg_save
;
6925 first_actual_arg
= first_actual_arg_save
;
6931 /* Resolve an expression from an iterator. They must be scalar and have
6932 INTEGER or (optionally) REAL type. */
6935 gfc_resolve_iterator_expr (gfc_expr
*expr
, bool real_ok
,
6936 const char *name_msgid
)
6938 if (!gfc_resolve_expr (expr
))
6941 if (expr
->rank
!= 0)
6943 gfc_error ("%s at %L must be a scalar", _(name_msgid
), &expr
->where
);
6947 if (expr
->ts
.type
!= BT_INTEGER
)
6949 if (expr
->ts
.type
== BT_REAL
)
6952 return gfc_notify_std (GFC_STD_F95_DEL
,
6953 "%s at %L must be integer",
6954 _(name_msgid
), &expr
->where
);
6957 gfc_error ("%s at %L must be INTEGER", _(name_msgid
),
6964 gfc_error ("%s at %L must be INTEGER", _(name_msgid
), &expr
->where
);
6972 /* Resolve the expressions in an iterator structure. If REAL_OK is
6973 false allow only INTEGER type iterators, otherwise allow REAL types.
6974 Set own_scope to true for ac-implied-do and data-implied-do as those
6975 have a separate scope such that, e.g., a INTENT(IN) doesn't apply. */
6978 gfc_resolve_iterator (gfc_iterator
*iter
, bool real_ok
, bool own_scope
)
6980 if (!gfc_resolve_iterator_expr (iter
->var
, real_ok
, "Loop variable"))
6983 if (!gfc_check_vardef_context (iter
->var
, false, false, own_scope
,
6984 _("iterator variable")))
6987 if (!gfc_resolve_iterator_expr (iter
->start
, real_ok
,
6988 "Start expression in DO loop"))
6991 if (!gfc_resolve_iterator_expr (iter
->end
, real_ok
,
6992 "End expression in DO loop"))
6995 if (!gfc_resolve_iterator_expr (iter
->step
, real_ok
,
6996 "Step expression in DO loop"))
6999 if (iter
->step
->expr_type
== EXPR_CONSTANT
)
7001 if ((iter
->step
->ts
.type
== BT_INTEGER
7002 && mpz_cmp_ui (iter
->step
->value
.integer
, 0) == 0)
7003 || (iter
->step
->ts
.type
== BT_REAL
7004 && mpfr_sgn (iter
->step
->value
.real
) == 0))
7006 gfc_error ("Step expression in DO loop at %L cannot be zero",
7007 &iter
->step
->where
);
7012 /* Convert start, end, and step to the same type as var. */
7013 if (iter
->start
->ts
.kind
!= iter
->var
->ts
.kind
7014 || iter
->start
->ts
.type
!= iter
->var
->ts
.type
)
7015 gfc_convert_type (iter
->start
, &iter
->var
->ts
, 1);
7017 if (iter
->end
->ts
.kind
!= iter
->var
->ts
.kind
7018 || iter
->end
->ts
.type
!= iter
->var
->ts
.type
)
7019 gfc_convert_type (iter
->end
, &iter
->var
->ts
, 1);
7021 if (iter
->step
->ts
.kind
!= iter
->var
->ts
.kind
7022 || iter
->step
->ts
.type
!= iter
->var
->ts
.type
)
7023 gfc_convert_type (iter
->step
, &iter
->var
->ts
, 1);
7025 if (iter
->start
->expr_type
== EXPR_CONSTANT
7026 && iter
->end
->expr_type
== EXPR_CONSTANT
7027 && iter
->step
->expr_type
== EXPR_CONSTANT
)
7030 if (iter
->start
->ts
.type
== BT_INTEGER
)
7032 sgn
= mpz_cmp_ui (iter
->step
->value
.integer
, 0);
7033 cmp
= mpz_cmp (iter
->end
->value
.integer
, iter
->start
->value
.integer
);
7037 sgn
= mpfr_sgn (iter
->step
->value
.real
);
7038 cmp
= mpfr_cmp (iter
->end
->value
.real
, iter
->start
->value
.real
);
7040 if (warn_zerotrip
&& ((sgn
> 0 && cmp
< 0) || (sgn
< 0 && cmp
> 0)))
7041 gfc_warning (OPT_Wzerotrip
,
7042 "DO loop at %L will be executed zero times",
7043 &iter
->step
->where
);
7046 if (iter
->end
->expr_type
== EXPR_CONSTANT
7047 && iter
->end
->ts
.type
== BT_INTEGER
7048 && iter
->step
->expr_type
== EXPR_CONSTANT
7049 && iter
->step
->ts
.type
== BT_INTEGER
7050 && (mpz_cmp_si (iter
->step
->value
.integer
, -1L) == 0
7051 || mpz_cmp_si (iter
->step
->value
.integer
, 1L) == 0))
7053 bool is_step_positive
= mpz_cmp_ui (iter
->step
->value
.integer
, 1) == 0;
7054 int k
= gfc_validate_kind (BT_INTEGER
, iter
->end
->ts
.kind
, false);
7056 if (is_step_positive
7057 && mpz_cmp (iter
->end
->value
.integer
, gfc_integer_kinds
[k
].huge
) == 0)
7058 gfc_warning (OPT_Wundefined_do_loop
,
7059 "DO loop at %L is undefined as it overflows",
7060 &iter
->step
->where
);
7061 else if (!is_step_positive
7062 && mpz_cmp (iter
->end
->value
.integer
,
7063 gfc_integer_kinds
[k
].min_int
) == 0)
7064 gfc_warning (OPT_Wundefined_do_loop
,
7065 "DO loop at %L is undefined as it underflows",
7066 &iter
->step
->where
);
7073 /* Traversal function for find_forall_index. f == 2 signals that
7074 that variable itself is not to be checked - only the references. */
7077 forall_index (gfc_expr
*expr
, gfc_symbol
*sym
, int *f
)
7079 if (expr
->expr_type
!= EXPR_VARIABLE
)
7082 /* A scalar assignment */
7083 if (!expr
->ref
|| *f
== 1)
7085 if (expr
->symtree
->n
.sym
== sym
)
7097 /* Check whether the FORALL index appears in the expression or not.
7098 Returns true if SYM is found in EXPR. */
7101 find_forall_index (gfc_expr
*expr
, gfc_symbol
*sym
, int f
)
7103 if (gfc_traverse_expr (expr
, sym
, forall_index
, f
))
7110 /* Resolve a list of FORALL iterators. The FORALL index-name is constrained
7111 to be a scalar INTEGER variable. The subscripts and stride are scalar
7112 INTEGERs, and if stride is a constant it must be nonzero.
7113 Furthermore "A subscript or stride in a forall-triplet-spec shall
7114 not contain a reference to any index-name in the
7115 forall-triplet-spec-list in which it appears." (7.5.4.1) */
7118 resolve_forall_iterators (gfc_forall_iterator
*it
)
7120 gfc_forall_iterator
*iter
, *iter2
;
7122 for (iter
= it
; iter
; iter
= iter
->next
)
7124 if (gfc_resolve_expr (iter
->var
)
7125 && (iter
->var
->ts
.type
!= BT_INTEGER
|| iter
->var
->rank
!= 0))
7126 gfc_error ("FORALL index-name at %L must be a scalar INTEGER",
7129 if (gfc_resolve_expr (iter
->start
)
7130 && (iter
->start
->ts
.type
!= BT_INTEGER
|| iter
->start
->rank
!= 0))
7131 gfc_error ("FORALL start expression at %L must be a scalar INTEGER",
7132 &iter
->start
->where
);
7133 if (iter
->var
->ts
.kind
!= iter
->start
->ts
.kind
)
7134 gfc_convert_type (iter
->start
, &iter
->var
->ts
, 1);
7136 if (gfc_resolve_expr (iter
->end
)
7137 && (iter
->end
->ts
.type
!= BT_INTEGER
|| iter
->end
->rank
!= 0))
7138 gfc_error ("FORALL end expression at %L must be a scalar INTEGER",
7140 if (iter
->var
->ts
.kind
!= iter
->end
->ts
.kind
)
7141 gfc_convert_type (iter
->end
, &iter
->var
->ts
, 1);
7143 if (gfc_resolve_expr (iter
->stride
))
7145 if (iter
->stride
->ts
.type
!= BT_INTEGER
|| iter
->stride
->rank
!= 0)
7146 gfc_error ("FORALL stride expression at %L must be a scalar %s",
7147 &iter
->stride
->where
, "INTEGER");
7149 if (iter
->stride
->expr_type
== EXPR_CONSTANT
7150 && mpz_cmp_ui (iter
->stride
->value
.integer
, 0) == 0)
7151 gfc_error ("FORALL stride expression at %L cannot be zero",
7152 &iter
->stride
->where
);
7154 if (iter
->var
->ts
.kind
!= iter
->stride
->ts
.kind
)
7155 gfc_convert_type (iter
->stride
, &iter
->var
->ts
, 1);
7158 for (iter
= it
; iter
; iter
= iter
->next
)
7159 for (iter2
= iter
; iter2
; iter2
= iter2
->next
)
7161 if (find_forall_index (iter2
->start
, iter
->var
->symtree
->n
.sym
, 0)
7162 || find_forall_index (iter2
->end
, iter
->var
->symtree
->n
.sym
, 0)
7163 || find_forall_index (iter2
->stride
, iter
->var
->symtree
->n
.sym
, 0))
7164 gfc_error ("FORALL index %qs may not appear in triplet "
7165 "specification at %L", iter
->var
->symtree
->name
,
7166 &iter2
->start
->where
);
7171 /* Given a pointer to a symbol that is a derived type, see if it's
7172 inaccessible, i.e. if it's defined in another module and the components are
7173 PRIVATE. The search is recursive if necessary. Returns zero if no
7174 inaccessible components are found, nonzero otherwise. */
7177 derived_inaccessible (gfc_symbol
*sym
)
7181 if (sym
->attr
.use_assoc
&& sym
->attr
.private_comp
)
7184 for (c
= sym
->components
; c
; c
= c
->next
)
7186 /* Prevent an infinite loop through this function. */
7187 if (c
->ts
.type
== BT_DERIVED
&& c
->attr
.pointer
7188 && sym
== c
->ts
.u
.derived
)
7191 if (c
->ts
.type
== BT_DERIVED
&& derived_inaccessible (c
->ts
.u
.derived
))
7199 /* Resolve the argument of a deallocate expression. The expression must be
7200 a pointer or a full array. */
7203 resolve_deallocate_expr (gfc_expr
*e
)
7205 symbol_attribute attr
;
7206 int allocatable
, pointer
;
7212 if (!gfc_resolve_expr (e
))
7215 if (e
->expr_type
!= EXPR_VARIABLE
)
7218 sym
= e
->symtree
->n
.sym
;
7219 unlimited
= UNLIMITED_POLY(sym
);
7221 if (sym
->ts
.type
== BT_CLASS
)
7223 allocatable
= CLASS_DATA (sym
)->attr
.allocatable
;
7224 pointer
= CLASS_DATA (sym
)->attr
.class_pointer
;
7228 allocatable
= sym
->attr
.allocatable
;
7229 pointer
= sym
->attr
.pointer
;
7231 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
7236 if (ref
->u
.ar
.type
!= AR_FULL
7237 && !(ref
->u
.ar
.type
== AR_ELEMENT
&& ref
->u
.ar
.as
->rank
== 0
7238 && ref
->u
.ar
.codimen
&& gfc_ref_this_image (ref
)))
7243 c
= ref
->u
.c
.component
;
7244 if (c
->ts
.type
== BT_CLASS
)
7246 allocatable
= CLASS_DATA (c
)->attr
.allocatable
;
7247 pointer
= CLASS_DATA (c
)->attr
.class_pointer
;
7251 allocatable
= c
->attr
.allocatable
;
7252 pointer
= c
->attr
.pointer
;
7263 attr
= gfc_expr_attr (e
);
7265 if (allocatable
== 0 && attr
.pointer
== 0 && !unlimited
)
7268 gfc_error ("Allocate-object at %L must be ALLOCATABLE or a POINTER",
7274 if (gfc_is_coindexed (e
))
7276 gfc_error ("Coindexed allocatable object at %L", &e
->where
);
7281 && !gfc_check_vardef_context (e
, true, true, false,
7282 _("DEALLOCATE object")))
7284 if (!gfc_check_vardef_context (e
, false, true, false,
7285 _("DEALLOCATE object")))
7292 /* Returns true if the expression e contains a reference to the symbol sym. */
7294 sym_in_expr (gfc_expr
*e
, gfc_symbol
*sym
, int *f ATTRIBUTE_UNUSED
)
7296 if (e
->expr_type
== EXPR_VARIABLE
&& e
->symtree
->n
.sym
== sym
)
7303 gfc_find_sym_in_expr (gfc_symbol
*sym
, gfc_expr
*e
)
7305 return gfc_traverse_expr (e
, sym
, sym_in_expr
, 0);
7309 /* Given the expression node e for an allocatable/pointer of derived type to be
7310 allocated, get the expression node to be initialized afterwards (needed for
7311 derived types with default initializers, and derived types with allocatable
7312 components that need nullification.) */
7315 gfc_expr_to_initialize (gfc_expr
*e
)
7321 result
= gfc_copy_expr (e
);
7323 /* Change the last array reference from AR_ELEMENT to AR_FULL. */
7324 for (ref
= result
->ref
; ref
; ref
= ref
->next
)
7325 if (ref
->type
== REF_ARRAY
&& ref
->next
== NULL
)
7327 ref
->u
.ar
.type
= AR_FULL
;
7329 for (i
= 0; i
< ref
->u
.ar
.dimen
; i
++)
7330 ref
->u
.ar
.start
[i
] = ref
->u
.ar
.end
[i
] = ref
->u
.ar
.stride
[i
] = NULL
;
7335 gfc_free_shape (&result
->shape
, result
->rank
);
7337 /* Recalculate rank, shape, etc. */
7338 gfc_resolve_expr (result
);
7343 /* If the last ref of an expression is an array ref, return a copy of the
7344 expression with that one removed. Otherwise, a copy of the original
7345 expression. This is used for allocate-expressions and pointer assignment
7346 LHS, where there may be an array specification that needs to be stripped
7347 off when using gfc_check_vardef_context. */
7350 remove_last_array_ref (gfc_expr
* e
)
7355 e2
= gfc_copy_expr (e
);
7356 for (r
= &e2
->ref
; *r
; r
= &(*r
)->next
)
7357 if ((*r
)->type
== REF_ARRAY
&& !(*r
)->next
)
7359 gfc_free_ref_list (*r
);
7368 /* Used in resolve_allocate_expr to check that a allocation-object and
7369 a source-expr are conformable. This does not catch all possible
7370 cases; in particular a runtime checking is needed. */
7373 conformable_arrays (gfc_expr
*e1
, gfc_expr
*e2
)
7376 for (tail
= e2
->ref
; tail
&& tail
->next
; tail
= tail
->next
);
7378 /* First compare rank. */
7379 if ((tail
&& e1
->rank
!= tail
->u
.ar
.as
->rank
)
7380 || (!tail
&& e1
->rank
!= e2
->rank
))
7382 gfc_error ("Source-expr at %L must be scalar or have the "
7383 "same rank as the allocate-object at %L",
7384 &e1
->where
, &e2
->where
);
7395 for (i
= 0; i
< e1
->rank
; i
++)
7397 if (tail
->u
.ar
.start
[i
] == NULL
)
7400 if (tail
->u
.ar
.end
[i
])
7402 mpz_set (s
, tail
->u
.ar
.end
[i
]->value
.integer
);
7403 mpz_sub (s
, s
, tail
->u
.ar
.start
[i
]->value
.integer
);
7404 mpz_add_ui (s
, s
, 1);
7408 mpz_set (s
, tail
->u
.ar
.start
[i
]->value
.integer
);
7411 if (mpz_cmp (e1
->shape
[i
], s
) != 0)
7413 gfc_error ("Source-expr at %L and allocate-object at %L must "
7414 "have the same shape", &e1
->where
, &e2
->where
);
7427 /* Resolve the expression in an ALLOCATE statement, doing the additional
7428 checks to see whether the expression is OK or not. The expression must
7429 have a trailing array reference that gives the size of the array. */
7432 resolve_allocate_expr (gfc_expr
*e
, gfc_code
*code
, bool *array_alloc_wo_spec
)
7434 int i
, pointer
, allocatable
, dimension
, is_abstract
;
7438 symbol_attribute attr
;
7439 gfc_ref
*ref
, *ref2
;
7442 gfc_symbol
*sym
= NULL
;
7447 /* Mark the utmost array component as being in allocate to allow DIMEN_STAR
7448 checking of coarrays. */
7449 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
7450 if (ref
->next
== NULL
)
7453 if (ref
&& ref
->type
== REF_ARRAY
)
7454 ref
->u
.ar
.in_allocate
= true;
7456 if (!gfc_resolve_expr (e
))
7459 /* Make sure the expression is allocatable or a pointer. If it is
7460 pointer, the next-to-last reference must be a pointer. */
7464 sym
= e
->symtree
->n
.sym
;
7466 /* Check whether ultimate component is abstract and CLASS. */
7469 /* Is the allocate-object unlimited polymorphic? */
7470 unlimited
= UNLIMITED_POLY(e
);
7472 if (e
->expr_type
!= EXPR_VARIABLE
)
7475 attr
= gfc_expr_attr (e
);
7476 pointer
= attr
.pointer
;
7477 dimension
= attr
.dimension
;
7478 codimension
= attr
.codimension
;
7482 if (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
))
7484 allocatable
= CLASS_DATA (sym
)->attr
.allocatable
;
7485 pointer
= CLASS_DATA (sym
)->attr
.class_pointer
;
7486 dimension
= CLASS_DATA (sym
)->attr
.dimension
;
7487 codimension
= CLASS_DATA (sym
)->attr
.codimension
;
7488 is_abstract
= CLASS_DATA (sym
)->attr
.abstract
;
7492 allocatable
= sym
->attr
.allocatable
;
7493 pointer
= sym
->attr
.pointer
;
7494 dimension
= sym
->attr
.dimension
;
7495 codimension
= sym
->attr
.codimension
;
7500 for (ref
= e
->ref
; ref
; ref2
= ref
, ref
= ref
->next
)
7505 if (ref
->u
.ar
.codimen
> 0)
7508 for (n
= ref
->u
.ar
.dimen
;
7509 n
< ref
->u
.ar
.dimen
+ ref
->u
.ar
.codimen
; n
++)
7510 if (ref
->u
.ar
.dimen_type
[n
] != DIMEN_THIS_IMAGE
)
7517 if (ref
->next
!= NULL
)
7525 gfc_error ("Coindexed allocatable object at %L",
7530 c
= ref
->u
.c
.component
;
7531 if (c
->ts
.type
== BT_CLASS
)
7533 allocatable
= CLASS_DATA (c
)->attr
.allocatable
;
7534 pointer
= CLASS_DATA (c
)->attr
.class_pointer
;
7535 dimension
= CLASS_DATA (c
)->attr
.dimension
;
7536 codimension
= CLASS_DATA (c
)->attr
.codimension
;
7537 is_abstract
= CLASS_DATA (c
)->attr
.abstract
;
7541 allocatable
= c
->attr
.allocatable
;
7542 pointer
= c
->attr
.pointer
;
7543 dimension
= c
->attr
.dimension
;
7544 codimension
= c
->attr
.codimension
;
7545 is_abstract
= c
->attr
.abstract
;
7558 /* Check for F08:C628. */
7559 if (allocatable
== 0 && pointer
== 0 && !unlimited
)
7561 gfc_error ("Allocate-object at %L must be ALLOCATABLE or a POINTER",
7566 /* Some checks for the SOURCE tag. */
7569 /* Check F03:C631. */
7570 if (!gfc_type_compatible (&e
->ts
, &code
->expr3
->ts
))
7572 gfc_error ("Type of entity at %L is type incompatible with "
7573 "source-expr at %L", &e
->where
, &code
->expr3
->where
);
7577 /* Check F03:C632 and restriction following Note 6.18. */
7578 if (code
->expr3
->rank
> 0 && !conformable_arrays (code
->expr3
, e
))
7581 /* Check F03:C633. */
7582 if (code
->expr3
->ts
.kind
!= e
->ts
.kind
&& !unlimited
)
7584 gfc_error ("The allocate-object at %L and the source-expr at %L "
7585 "shall have the same kind type parameter",
7586 &e
->where
, &code
->expr3
->where
);
7590 /* Check F2008, C642. */
7591 if (code
->expr3
->ts
.type
== BT_DERIVED
7592 && ((codimension
&& gfc_expr_attr (code
->expr3
).lock_comp
)
7593 || (code
->expr3
->ts
.u
.derived
->from_intmod
7594 == INTMOD_ISO_FORTRAN_ENV
7595 && code
->expr3
->ts
.u
.derived
->intmod_sym_id
7596 == ISOFORTRAN_LOCK_TYPE
)))
7598 gfc_error ("The source-expr at %L shall neither be of type "
7599 "LOCK_TYPE nor have a LOCK_TYPE component if "
7600 "allocate-object at %L is a coarray",
7601 &code
->expr3
->where
, &e
->where
);
7605 /* Check TS18508, C702/C703. */
7606 if (code
->expr3
->ts
.type
== BT_DERIVED
7607 && ((codimension
&& gfc_expr_attr (code
->expr3
).event_comp
)
7608 || (code
->expr3
->ts
.u
.derived
->from_intmod
7609 == INTMOD_ISO_FORTRAN_ENV
7610 && code
->expr3
->ts
.u
.derived
->intmod_sym_id
7611 == ISOFORTRAN_EVENT_TYPE
)))
7613 gfc_error ("The source-expr at %L shall neither be of type "
7614 "EVENT_TYPE nor have a EVENT_TYPE component if "
7615 "allocate-object at %L is a coarray",
7616 &code
->expr3
->where
, &e
->where
);
7621 /* Check F08:C629. */
7622 if (is_abstract
&& code
->ext
.alloc
.ts
.type
== BT_UNKNOWN
7625 gcc_assert (e
->ts
.type
== BT_CLASS
);
7626 gfc_error ("Allocating %s of ABSTRACT base type at %L requires a "
7627 "type-spec or source-expr", sym
->name
, &e
->where
);
7631 /* Check F08:C632. */
7632 if (code
->ext
.alloc
.ts
.type
== BT_CHARACTER
&& !e
->ts
.deferred
7633 && !UNLIMITED_POLY (e
))
7637 if (!e
->ts
.u
.cl
->length
)
7640 cmp
= gfc_dep_compare_expr (e
->ts
.u
.cl
->length
,
7641 code
->ext
.alloc
.ts
.u
.cl
->length
);
7642 if (cmp
== 1 || cmp
== -1 || cmp
== -3)
7644 gfc_error ("Allocating %s at %L with type-spec requires the same "
7645 "character-length parameter as in the declaration",
7646 sym
->name
, &e
->where
);
7651 /* In the variable definition context checks, gfc_expr_attr is used
7652 on the expression. This is fooled by the array specification
7653 present in e, thus we have to eliminate that one temporarily. */
7654 e2
= remove_last_array_ref (e
);
7657 t
= gfc_check_vardef_context (e2
, true, true, false,
7658 _("ALLOCATE object"));
7660 t
= gfc_check_vardef_context (e2
, false, true, false,
7661 _("ALLOCATE object"));
7666 if (e
->ts
.type
== BT_CLASS
&& CLASS_DATA (e
)->attr
.dimension
7667 && !code
->expr3
&& code
->ext
.alloc
.ts
.type
== BT_DERIVED
)
7669 /* For class arrays, the initialization with SOURCE is done
7670 using _copy and trans_call. It is convenient to exploit that
7671 when the allocated type is different from the declared type but
7672 no SOURCE exists by setting expr3. */
7673 code
->expr3
= gfc_default_initializer (&code
->ext
.alloc
.ts
);
7675 else if (flag_coarray
!= GFC_FCOARRAY_LIB
&& e
->ts
.type
== BT_DERIVED
7676 && e
->ts
.u
.derived
->from_intmod
== INTMOD_ISO_FORTRAN_ENV
7677 && e
->ts
.u
.derived
->intmod_sym_id
== ISOFORTRAN_EVENT_TYPE
)
7679 /* We have to zero initialize the integer variable. */
7680 code
->expr3
= gfc_get_int_expr (gfc_default_integer_kind
, &e
->where
, 0);
7683 if (e
->ts
.type
== BT_CLASS
&& !unlimited
&& !UNLIMITED_POLY (code
->expr3
))
7685 /* Make sure the vtab symbol is present when
7686 the module variables are generated. */
7687 gfc_typespec ts
= e
->ts
;
7689 ts
= code
->expr3
->ts
;
7690 else if (code
->ext
.alloc
.ts
.type
== BT_DERIVED
)
7691 ts
= code
->ext
.alloc
.ts
;
7693 /* Finding the vtab also publishes the type's symbol. Therefore this
7694 statement is necessary. */
7695 gfc_find_derived_vtab (ts
.u
.derived
);
7697 else if (unlimited
&& !UNLIMITED_POLY (code
->expr3
))
7699 /* Again, make sure the vtab symbol is present when
7700 the module variables are generated. */
7701 gfc_typespec
*ts
= NULL
;
7703 ts
= &code
->expr3
->ts
;
7705 ts
= &code
->ext
.alloc
.ts
;
7709 /* Finding the vtab also publishes the type's symbol. Therefore this
7710 statement is necessary. */
7714 if (dimension
== 0 && codimension
== 0)
7717 /* Make sure the last reference node is an array specification. */
7719 if (!ref2
|| ref2
->type
!= REF_ARRAY
|| ref2
->u
.ar
.type
== AR_FULL
7720 || (dimension
&& ref2
->u
.ar
.dimen
== 0))
7725 if (!gfc_notify_std (GFC_STD_F2008
, "Array specification required "
7726 "in ALLOCATE statement at %L", &e
->where
))
7728 if (code
->expr3
->rank
!= 0)
7729 *array_alloc_wo_spec
= true;
7732 gfc_error ("Array specification or array-valued SOURCE= "
7733 "expression required in ALLOCATE statement at %L",
7740 gfc_error ("Array specification required in ALLOCATE statement "
7741 "at %L", &e
->where
);
7746 /* Make sure that the array section reference makes sense in the
7747 context of an ALLOCATE specification. */
7752 for (i
= ar
->dimen
; i
< ar
->dimen
+ ar
->codimen
; i
++)
7753 if (ar
->dimen_type
[i
] == DIMEN_THIS_IMAGE
)
7755 gfc_error ("Coarray specification required in ALLOCATE statement "
7756 "at %L", &e
->where
);
7760 for (i
= 0; i
< ar
->dimen
; i
++)
7762 if (ar
->type
== AR_ELEMENT
|| ar
->type
== AR_FULL
)
7765 switch (ar
->dimen_type
[i
])
7771 if (ar
->start
[i
] != NULL
7772 && ar
->end
[i
] != NULL
7773 && ar
->stride
[i
] == NULL
)
7781 case DIMEN_THIS_IMAGE
:
7782 gfc_error ("Bad array specification in ALLOCATE statement at %L",
7788 for (a
= code
->ext
.alloc
.list
; a
; a
= a
->next
)
7790 sym
= a
->expr
->symtree
->n
.sym
;
7792 /* TODO - check derived type components. */
7793 if (gfc_bt_struct (sym
->ts
.type
) || sym
->ts
.type
== BT_CLASS
)
7796 if ((ar
->start
[i
] != NULL
7797 && gfc_find_sym_in_expr (sym
, ar
->start
[i
]))
7798 || (ar
->end
[i
] != NULL
7799 && gfc_find_sym_in_expr (sym
, ar
->end
[i
])))
7801 gfc_error ("%qs must not appear in the array specification at "
7802 "%L in the same ALLOCATE statement where it is "
7803 "itself allocated", sym
->name
, &ar
->where
);
7809 for (i
= ar
->dimen
; i
< ar
->codimen
+ ar
->dimen
; i
++)
7811 if (ar
->dimen_type
[i
] == DIMEN_ELEMENT
7812 || ar
->dimen_type
[i
] == DIMEN_RANGE
)
7814 if (i
== (ar
->dimen
+ ar
->codimen
- 1))
7816 gfc_error ("Expected '*' in coindex specification in ALLOCATE "
7817 "statement at %L", &e
->where
);
7823 if (ar
->dimen_type
[i
] == DIMEN_STAR
&& i
== (ar
->dimen
+ ar
->codimen
- 1)
7824 && ar
->stride
[i
] == NULL
)
7827 gfc_error ("Bad coarray specification in ALLOCATE statement at %L",
7841 resolve_allocate_deallocate (gfc_code
*code
, const char *fcn
)
7843 gfc_expr
*stat
, *errmsg
, *pe
, *qe
;
7844 gfc_alloc
*a
, *p
, *q
;
7847 errmsg
= code
->expr2
;
7849 /* Check the stat variable. */
7852 gfc_check_vardef_context (stat
, false, false, false,
7853 _("STAT variable"));
7855 if ((stat
->ts
.type
!= BT_INTEGER
7856 && !(stat
->ref
&& (stat
->ref
->type
== REF_ARRAY
7857 || stat
->ref
->type
== REF_COMPONENT
)))
7859 gfc_error ("Stat-variable at %L must be a scalar INTEGER "
7860 "variable", &stat
->where
);
7862 for (p
= code
->ext
.alloc
.list
; p
; p
= p
->next
)
7863 if (p
->expr
->symtree
->n
.sym
->name
== stat
->symtree
->n
.sym
->name
)
7865 gfc_ref
*ref1
, *ref2
;
7868 for (ref1
= p
->expr
->ref
, ref2
= stat
->ref
; ref1
&& ref2
;
7869 ref1
= ref1
->next
, ref2
= ref2
->next
)
7871 if (ref1
->type
!= REF_COMPONENT
|| ref2
->type
!= REF_COMPONENT
)
7873 if (ref1
->u
.c
.component
->name
!= ref2
->u
.c
.component
->name
)
7882 gfc_error ("Stat-variable at %L shall not be %sd within "
7883 "the same %s statement", &stat
->where
, fcn
, fcn
);
7889 /* Check the errmsg variable. */
7893 gfc_warning (0, "ERRMSG at %L is useless without a STAT tag",
7896 gfc_check_vardef_context (errmsg
, false, false, false,
7897 _("ERRMSG variable"));
7899 /* F18:R928 alloc-opt is ERRMSG = errmsg-variable
7900 F18:R930 errmsg-variable is scalar-default-char-variable
7901 F18:R906 default-char-variable is variable
7902 F18:C906 default-char-variable shall be default character. */
7903 if ((errmsg
->ts
.type
!= BT_CHARACTER
7905 && (errmsg
->ref
->type
== REF_ARRAY
7906 || errmsg
->ref
->type
== REF_COMPONENT
)))
7908 || errmsg
->ts
.kind
!= gfc_default_character_kind
)
7909 gfc_error ("ERRMSG variable at %L shall be a scalar default CHARACTER "
7910 "variable", &errmsg
->where
);
7912 for (p
= code
->ext
.alloc
.list
; p
; p
= p
->next
)
7913 if (p
->expr
->symtree
->n
.sym
->name
== errmsg
->symtree
->n
.sym
->name
)
7915 gfc_ref
*ref1
, *ref2
;
7918 for (ref1
= p
->expr
->ref
, ref2
= errmsg
->ref
; ref1
&& ref2
;
7919 ref1
= ref1
->next
, ref2
= ref2
->next
)
7921 if (ref1
->type
!= REF_COMPONENT
|| ref2
->type
!= REF_COMPONENT
)
7923 if (ref1
->u
.c
.component
->name
!= ref2
->u
.c
.component
->name
)
7932 gfc_error ("Errmsg-variable at %L shall not be %sd within "
7933 "the same %s statement", &errmsg
->where
, fcn
, fcn
);
7939 /* Check that an allocate-object appears only once in the statement. */
7941 for (p
= code
->ext
.alloc
.list
; p
; p
= p
->next
)
7944 for (q
= p
->next
; q
; q
= q
->next
)
7947 if (pe
->symtree
->n
.sym
->name
== qe
->symtree
->n
.sym
->name
)
7949 /* This is a potential collision. */
7950 gfc_ref
*pr
= pe
->ref
;
7951 gfc_ref
*qr
= qe
->ref
;
7953 /* Follow the references until
7954 a) They start to differ, in which case there is no error;
7955 you can deallocate a%b and a%c in a single statement
7956 b) Both of them stop, which is an error
7957 c) One of them stops, which is also an error. */
7960 if (pr
== NULL
&& qr
== NULL
)
7962 gfc_error ("Allocate-object at %L also appears at %L",
7963 &pe
->where
, &qe
->where
);
7966 else if (pr
!= NULL
&& qr
== NULL
)
7968 gfc_error ("Allocate-object at %L is subobject of"
7969 " object at %L", &pe
->where
, &qe
->where
);
7972 else if (pr
== NULL
&& qr
!= NULL
)
7974 gfc_error ("Allocate-object at %L is subobject of"
7975 " object at %L", &qe
->where
, &pe
->where
);
7978 /* Here, pr != NULL && qr != NULL */
7979 gcc_assert(pr
->type
== qr
->type
);
7980 if (pr
->type
== REF_ARRAY
)
7982 /* Handle cases like allocate(v(3)%x(3), v(2)%x(3)),
7984 gcc_assert (qr
->type
== REF_ARRAY
);
7986 if (pr
->next
&& qr
->next
)
7989 gfc_array_ref
*par
= &(pr
->u
.ar
);
7990 gfc_array_ref
*qar
= &(qr
->u
.ar
);
7992 for (i
=0; i
<par
->dimen
; i
++)
7994 if ((par
->start
[i
] != NULL
7995 || qar
->start
[i
] != NULL
)
7996 && gfc_dep_compare_expr (par
->start
[i
],
7997 qar
->start
[i
]) != 0)
8004 if (pr
->u
.c
.component
->name
!= qr
->u
.c
.component
->name
)
8017 if (strcmp (fcn
, "ALLOCATE") == 0)
8019 bool arr_alloc_wo_spec
= false;
8021 /* Resolving the expr3 in the loop over all objects to allocate would
8022 execute loop invariant code for each loop item. Therefore do it just
8024 if (code
->expr3
&& code
->expr3
->mold
8025 && code
->expr3
->ts
.type
== BT_DERIVED
)
8027 /* Default initialization via MOLD (non-polymorphic). */
8028 gfc_expr
*rhs
= gfc_default_initializer (&code
->expr3
->ts
);
8031 gfc_resolve_expr (rhs
);
8032 gfc_free_expr (code
->expr3
);
8036 for (a
= code
->ext
.alloc
.list
; a
; a
= a
->next
)
8037 resolve_allocate_expr (a
->expr
, code
, &arr_alloc_wo_spec
);
8039 if (arr_alloc_wo_spec
&& code
->expr3
)
8041 /* Mark the allocate to have to take the array specification
8043 code
->ext
.alloc
.arr_spec_from_expr3
= 1;
8048 for (a
= code
->ext
.alloc
.list
; a
; a
= a
->next
)
8049 resolve_deallocate_expr (a
->expr
);
8054 /************ SELECT CASE resolution subroutines ************/
8056 /* Callback function for our mergesort variant. Determines interval
8057 overlaps for CASEs. Return <0 if op1 < op2, 0 for overlap, >0 for
8058 op1 > op2. Assumes we're not dealing with the default case.
8059 We have op1 = (:L), (K:L) or (K:) and op2 = (:N), (M:N) or (M:).
8060 There are nine situations to check. */
8063 compare_cases (const gfc_case
*op1
, const gfc_case
*op2
)
8067 if (op1
->low
== NULL
) /* op1 = (:L) */
8069 /* op2 = (:N), so overlap. */
8071 /* op2 = (M:) or (M:N), L < M */
8072 if (op2
->low
!= NULL
8073 && gfc_compare_expr (op1
->high
, op2
->low
, INTRINSIC_LT
) < 0)
8076 else if (op1
->high
== NULL
) /* op1 = (K:) */
8078 /* op2 = (M:), so overlap. */
8080 /* op2 = (:N) or (M:N), K > N */
8081 if (op2
->high
!= NULL
8082 && gfc_compare_expr (op1
->low
, op2
->high
, INTRINSIC_GT
) > 0)
8085 else /* op1 = (K:L) */
8087 if (op2
->low
== NULL
) /* op2 = (:N), K > N */
8088 retval
= (gfc_compare_expr (op1
->low
, op2
->high
, INTRINSIC_GT
) > 0)
8090 else if (op2
->high
== NULL
) /* op2 = (M:), L < M */
8091 retval
= (gfc_compare_expr (op1
->high
, op2
->low
, INTRINSIC_LT
) < 0)
8093 else /* op2 = (M:N) */
8097 if (gfc_compare_expr (op1
->high
, op2
->low
, INTRINSIC_LT
) < 0)
8100 else if (gfc_compare_expr (op1
->low
, op2
->high
, INTRINSIC_GT
) > 0)
8109 /* Merge-sort a double linked case list, detecting overlap in the
8110 process. LIST is the head of the double linked case list before it
8111 is sorted. Returns the head of the sorted list if we don't see any
8112 overlap, or NULL otherwise. */
8115 check_case_overlap (gfc_case
*list
)
8117 gfc_case
*p
, *q
, *e
, *tail
;
8118 int insize
, nmerges
, psize
, qsize
, cmp
, overlap_seen
;
8120 /* If the passed list was empty, return immediately. */
8127 /* Loop unconditionally. The only exit from this loop is a return
8128 statement, when we've finished sorting the case list. */
8135 /* Count the number of merges we do in this pass. */
8138 /* Loop while there exists a merge to be done. */
8143 /* Count this merge. */
8146 /* Cut the list in two pieces by stepping INSIZE places
8147 forward in the list, starting from P. */
8150 for (i
= 0; i
< insize
; i
++)
8159 /* Now we have two lists. Merge them! */
8160 while (psize
> 0 || (qsize
> 0 && q
!= NULL
))
8162 /* See from which the next case to merge comes from. */
8165 /* P is empty so the next case must come from Q. */
8170 else if (qsize
== 0 || q
== NULL
)
8179 cmp
= compare_cases (p
, q
);
8182 /* The whole case range for P is less than the
8190 /* The whole case range for Q is greater than
8191 the case range for P. */
8198 /* The cases overlap, or they are the same
8199 element in the list. Either way, we must
8200 issue an error and get the next case from P. */
8201 /* FIXME: Sort P and Q by line number. */
8202 gfc_error ("CASE label at %L overlaps with CASE "
8203 "label at %L", &p
->where
, &q
->where
);
8211 /* Add the next element to the merged list. */
8220 /* P has now stepped INSIZE places along, and so has Q. So
8221 they're the same. */
8226 /* If we have done only one merge or none at all, we've
8227 finished sorting the cases. */
8236 /* Otherwise repeat, merging lists twice the size. */
8242 /* Check to see if an expression is suitable for use in a CASE statement.
8243 Makes sure that all case expressions are scalar constants of the same
8244 type. Return false if anything is wrong. */
8247 validate_case_label_expr (gfc_expr
*e
, gfc_expr
*case_expr
)
8249 if (e
== NULL
) return true;
8251 if (e
->ts
.type
!= case_expr
->ts
.type
)
8253 gfc_error ("Expression in CASE statement at %L must be of type %s",
8254 &e
->where
, gfc_basic_typename (case_expr
->ts
.type
));
8258 /* C805 (R808) For a given case-construct, each case-value shall be of
8259 the same type as case-expr. For character type, length differences
8260 are allowed, but the kind type parameters shall be the same. */
8262 if (case_expr
->ts
.type
== BT_CHARACTER
&& e
->ts
.kind
!= case_expr
->ts
.kind
)
8264 gfc_error ("Expression in CASE statement at %L must be of kind %d",
8265 &e
->where
, case_expr
->ts
.kind
);
8269 /* Convert the case value kind to that of case expression kind,
8272 if (e
->ts
.kind
!= case_expr
->ts
.kind
)
8273 gfc_convert_type_warn (e
, &case_expr
->ts
, 2, 0);
8277 gfc_error ("Expression in CASE statement at %L must be scalar",
8286 /* Given a completely parsed select statement, we:
8288 - Validate all expressions and code within the SELECT.
8289 - Make sure that the selection expression is not of the wrong type.
8290 - Make sure that no case ranges overlap.
8291 - Eliminate unreachable cases and unreachable code resulting from
8292 removing case labels.
8294 The standard does allow unreachable cases, e.g. CASE (5:3). But
8295 they are a hassle for code generation, and to prevent that, we just
8296 cut them out here. This is not necessary for overlapping cases
8297 because they are illegal and we never even try to generate code.
8299 We have the additional caveat that a SELECT construct could have
8300 been a computed GOTO in the source code. Fortunately we can fairly
8301 easily work around that here: The case_expr for a "real" SELECT CASE
8302 is in code->expr1, but for a computed GOTO it is in code->expr2. All
8303 we have to do is make sure that the case_expr is a scalar integer
8307 resolve_select (gfc_code
*code
, bool select_type
)
8310 gfc_expr
*case_expr
;
8311 gfc_case
*cp
, *default_case
, *tail
, *head
;
8312 int seen_unreachable
;
8318 if (code
->expr1
== NULL
)
8320 /* This was actually a computed GOTO statement. */
8321 case_expr
= code
->expr2
;
8322 if (case_expr
->ts
.type
!= BT_INTEGER
|| case_expr
->rank
!= 0)
8323 gfc_error ("Selection expression in computed GOTO statement "
8324 "at %L must be a scalar integer expression",
8327 /* Further checking is not necessary because this SELECT was built
8328 by the compiler, so it should always be OK. Just move the
8329 case_expr from expr2 to expr so that we can handle computed
8330 GOTOs as normal SELECTs from here on. */
8331 code
->expr1
= code
->expr2
;
8336 case_expr
= code
->expr1
;
8337 type
= case_expr
->ts
.type
;
8340 if (type
!= BT_LOGICAL
&& type
!= BT_INTEGER
&& type
!= BT_CHARACTER
)
8342 gfc_error ("Argument of SELECT statement at %L cannot be %s",
8343 &case_expr
->where
, gfc_typename (&case_expr
->ts
));
8345 /* Punt. Going on here just produce more garbage error messages. */
8350 if (!select_type
&& case_expr
->rank
!= 0)
8352 gfc_error ("Argument of SELECT statement at %L must be a scalar "
8353 "expression", &case_expr
->where
);
8359 /* Raise a warning if an INTEGER case value exceeds the range of
8360 the case-expr. Later, all expressions will be promoted to the
8361 largest kind of all case-labels. */
8363 if (type
== BT_INTEGER
)
8364 for (body
= code
->block
; body
; body
= body
->block
)
8365 for (cp
= body
->ext
.block
.case_list
; cp
; cp
= cp
->next
)
8368 && gfc_check_integer_range (cp
->low
->value
.integer
,
8369 case_expr
->ts
.kind
) != ARITH_OK
)
8370 gfc_warning (0, "Expression in CASE statement at %L is "
8371 "not in the range of %s", &cp
->low
->where
,
8372 gfc_typename (&case_expr
->ts
));
8375 && cp
->low
!= cp
->high
8376 && gfc_check_integer_range (cp
->high
->value
.integer
,
8377 case_expr
->ts
.kind
) != ARITH_OK
)
8378 gfc_warning (0, "Expression in CASE statement at %L is "
8379 "not in the range of %s", &cp
->high
->where
,
8380 gfc_typename (&case_expr
->ts
));
8383 /* PR 19168 has a long discussion concerning a mismatch of the kinds
8384 of the SELECT CASE expression and its CASE values. Walk the lists
8385 of case values, and if we find a mismatch, promote case_expr to
8386 the appropriate kind. */
8388 if (type
== BT_LOGICAL
|| type
== BT_INTEGER
)
8390 for (body
= code
->block
; body
; body
= body
->block
)
8392 /* Walk the case label list. */
8393 for (cp
= body
->ext
.block
.case_list
; cp
; cp
= cp
->next
)
8395 /* Intercept the DEFAULT case. It does not have a kind. */
8396 if (cp
->low
== NULL
&& cp
->high
== NULL
)
8399 /* Unreachable case ranges are discarded, so ignore. */
8400 if (cp
->low
!= NULL
&& cp
->high
!= NULL
8401 && cp
->low
!= cp
->high
8402 && gfc_compare_expr (cp
->low
, cp
->high
, INTRINSIC_GT
) > 0)
8406 && case_expr
->ts
.kind
!= gfc_kind_max(case_expr
, cp
->low
))
8407 gfc_convert_type_warn (case_expr
, &cp
->low
->ts
, 2, 0);
8409 if (cp
->high
!= NULL
8410 && case_expr
->ts
.kind
!= gfc_kind_max(case_expr
, cp
->high
))
8411 gfc_convert_type_warn (case_expr
, &cp
->high
->ts
, 2, 0);
8416 /* Assume there is no DEFAULT case. */
8417 default_case
= NULL
;
8422 for (body
= code
->block
; body
; body
= body
->block
)
8424 /* Assume the CASE list is OK, and all CASE labels can be matched. */
8426 seen_unreachable
= 0;
8428 /* Walk the case label list, making sure that all case labels
8430 for (cp
= body
->ext
.block
.case_list
; cp
; cp
= cp
->next
)
8432 /* Count the number of cases in the whole construct. */
8435 /* Intercept the DEFAULT case. */
8436 if (cp
->low
== NULL
&& cp
->high
== NULL
)
8438 if (default_case
!= NULL
)
8440 gfc_error ("The DEFAULT CASE at %L cannot be followed "
8441 "by a second DEFAULT CASE at %L",
8442 &default_case
->where
, &cp
->where
);
8453 /* Deal with single value cases and case ranges. Errors are
8454 issued from the validation function. */
8455 if (!validate_case_label_expr (cp
->low
, case_expr
)
8456 || !validate_case_label_expr (cp
->high
, case_expr
))
8462 if (type
== BT_LOGICAL
8463 && ((cp
->low
== NULL
|| cp
->high
== NULL
)
8464 || cp
->low
!= cp
->high
))
8466 gfc_error ("Logical range in CASE statement at %L is not "
8467 "allowed", &cp
->low
->where
);
8472 if (type
== BT_LOGICAL
&& cp
->low
->expr_type
== EXPR_CONSTANT
)
8475 value
= cp
->low
->value
.logical
== 0 ? 2 : 1;
8476 if (value
& seen_logical
)
8478 gfc_error ("Constant logical value in CASE statement "
8479 "is repeated at %L",
8484 seen_logical
|= value
;
8487 if (cp
->low
!= NULL
&& cp
->high
!= NULL
8488 && cp
->low
!= cp
->high
8489 && gfc_compare_expr (cp
->low
, cp
->high
, INTRINSIC_GT
) > 0)
8491 if (warn_surprising
)
8492 gfc_warning (OPT_Wsurprising
,
8493 "Range specification at %L can never be matched",
8496 cp
->unreachable
= 1;
8497 seen_unreachable
= 1;
8501 /* If the case range can be matched, it can also overlap with
8502 other cases. To make sure it does not, we put it in a
8503 double linked list here. We sort that with a merge sort
8504 later on to detect any overlapping cases. */
8508 head
->right
= head
->left
= NULL
;
8513 tail
->right
->left
= tail
;
8520 /* It there was a failure in the previous case label, give up
8521 for this case label list. Continue with the next block. */
8525 /* See if any case labels that are unreachable have been seen.
8526 If so, we eliminate them. This is a bit of a kludge because
8527 the case lists for a single case statement (label) is a
8528 single forward linked lists. */
8529 if (seen_unreachable
)
8531 /* Advance until the first case in the list is reachable. */
8532 while (body
->ext
.block
.case_list
!= NULL
8533 && body
->ext
.block
.case_list
->unreachable
)
8535 gfc_case
*n
= body
->ext
.block
.case_list
;
8536 body
->ext
.block
.case_list
= body
->ext
.block
.case_list
->next
;
8538 gfc_free_case_list (n
);
8541 /* Strip all other unreachable cases. */
8542 if (body
->ext
.block
.case_list
)
8544 for (cp
= body
->ext
.block
.case_list
; cp
&& cp
->next
; cp
= cp
->next
)
8546 if (cp
->next
->unreachable
)
8548 gfc_case
*n
= cp
->next
;
8549 cp
->next
= cp
->next
->next
;
8551 gfc_free_case_list (n
);
8558 /* See if there were overlapping cases. If the check returns NULL,
8559 there was overlap. In that case we don't do anything. If head
8560 is non-NULL, we prepend the DEFAULT case. The sorted list can
8561 then used during code generation for SELECT CASE constructs with
8562 a case expression of a CHARACTER type. */
8565 head
= check_case_overlap (head
);
8567 /* Prepend the default_case if it is there. */
8568 if (head
!= NULL
&& default_case
)
8570 default_case
->left
= NULL
;
8571 default_case
->right
= head
;
8572 head
->left
= default_case
;
8576 /* Eliminate dead blocks that may be the result if we've seen
8577 unreachable case labels for a block. */
8578 for (body
= code
; body
&& body
->block
; body
= body
->block
)
8580 if (body
->block
->ext
.block
.case_list
== NULL
)
8582 /* Cut the unreachable block from the code chain. */
8583 gfc_code
*c
= body
->block
;
8584 body
->block
= c
->block
;
8586 /* Kill the dead block, but not the blocks below it. */
8588 gfc_free_statements (c
);
8592 /* More than two cases is legal but insane for logical selects.
8593 Issue a warning for it. */
8594 if (warn_surprising
&& type
== BT_LOGICAL
&& ncases
> 2)
8595 gfc_warning (OPT_Wsurprising
,
8596 "Logical SELECT CASE block at %L has more that two cases",
8601 /* Check if a derived type is extensible. */
8604 gfc_type_is_extensible (gfc_symbol
*sym
)
8606 return !(sym
->attr
.is_bind_c
|| sym
->attr
.sequence
8607 || (sym
->attr
.is_class
8608 && sym
->components
->ts
.u
.derived
->attr
.unlimited_polymorphic
));
8613 resolve_types (gfc_namespace
*ns
);
8615 /* Resolve an associate-name: Resolve target and ensure the type-spec is
8616 correct as well as possibly the array-spec. */
8619 resolve_assoc_var (gfc_symbol
* sym
, bool resolve_target
)
8623 gcc_assert (sym
->assoc
);
8624 gcc_assert (sym
->attr
.flavor
== FL_VARIABLE
);
8626 /* If this is for SELECT TYPE, the target may not yet be set. In that
8627 case, return. Resolution will be called later manually again when
8629 target
= sym
->assoc
->target
;
8632 gcc_assert (!sym
->assoc
->dangling
);
8634 if (resolve_target
&& !gfc_resolve_expr (target
))
8637 /* For variable targets, we get some attributes from the target. */
8638 if (target
->expr_type
== EXPR_VARIABLE
)
8642 gcc_assert (target
->symtree
);
8643 tsym
= target
->symtree
->n
.sym
;
8645 sym
->attr
.asynchronous
= tsym
->attr
.asynchronous
;
8646 sym
->attr
.volatile_
= tsym
->attr
.volatile_
;
8648 sym
->attr
.target
= tsym
->attr
.target
8649 || gfc_expr_attr (target
).pointer
;
8650 if (is_subref_array (target
))
8651 sym
->attr
.subref_array_pointer
= 1;
8654 if (target
->expr_type
== EXPR_NULL
)
8656 gfc_error ("Selector at %L cannot be NULL()", &target
->where
);
8659 else if (target
->ts
.type
== BT_UNKNOWN
)
8661 gfc_error ("Selector at %L has no type", &target
->where
);
8665 /* Get type if this was not already set. Note that it can be
8666 some other type than the target in case this is a SELECT TYPE
8667 selector! So we must not update when the type is already there. */
8668 if (sym
->ts
.type
== BT_UNKNOWN
)
8669 sym
->ts
= target
->ts
;
8671 gcc_assert (sym
->ts
.type
!= BT_UNKNOWN
);
8673 /* See if this is a valid association-to-variable. */
8674 sym
->assoc
->variable
= (target
->expr_type
== EXPR_VARIABLE
8675 && !gfc_has_vector_subscript (target
));
8677 /* Finally resolve if this is an array or not. */
8678 if (sym
->attr
.dimension
&& target
->rank
== 0)
8680 /* primary.c makes the assumption that a reference to an associate
8681 name followed by a left parenthesis is an array reference. */
8682 if (sym
->ts
.type
!= BT_CHARACTER
)
8683 gfc_error ("Associate-name %qs at %L is used as array",
8684 sym
->name
, &sym
->declared_at
);
8685 sym
->attr
.dimension
= 0;
8690 /* We cannot deal with class selectors that need temporaries. */
8691 if (target
->ts
.type
== BT_CLASS
8692 && gfc_ref_needs_temporary_p (target
->ref
))
8694 gfc_error ("CLASS selector at %L needs a temporary which is not "
8695 "yet implemented", &target
->where
);
8699 if (target
->ts
.type
== BT_CLASS
)
8700 gfc_fix_class_refs (target
);
8702 if (target
->rank
!= 0)
8705 /* The rank may be incorrectly guessed at parsing, therefore make sure
8706 it is corrected now. */
8707 if (sym
->ts
.type
!= BT_CLASS
&& (!sym
->as
|| sym
->assoc
->rankguessed
))
8710 sym
->as
= gfc_get_array_spec ();
8712 as
->rank
= target
->rank
;
8713 as
->type
= AS_DEFERRED
;
8714 as
->corank
= gfc_get_corank (target
);
8715 sym
->attr
.dimension
= 1;
8716 if (as
->corank
!= 0)
8717 sym
->attr
.codimension
= 1;
8719 else if (sym
->ts
.type
== BT_CLASS
&& (!CLASS_DATA (sym
)->as
|| sym
->assoc
->rankguessed
))
8721 if (!CLASS_DATA (sym
)->as
)
8722 CLASS_DATA (sym
)->as
= gfc_get_array_spec ();
8723 as
= CLASS_DATA (sym
)->as
;
8724 as
->rank
= target
->rank
;
8725 as
->type
= AS_DEFERRED
;
8726 as
->corank
= gfc_get_corank (target
);
8727 CLASS_DATA (sym
)->attr
.dimension
= 1;
8728 if (as
->corank
!= 0)
8729 CLASS_DATA (sym
)->attr
.codimension
= 1;
8734 /* target's rank is 0, but the type of the sym is still array valued,
8735 which has to be corrected. */
8736 if (sym
->ts
.type
== BT_CLASS
8737 && CLASS_DATA (sym
) && CLASS_DATA (sym
)->as
)
8740 symbol_attribute attr
;
8741 /* The associated variable's type is still the array type
8742 correct this now. */
8743 gfc_typespec
*ts
= &target
->ts
;
8746 for (ref
= target
->ref
; ref
!= NULL
; ref
= ref
->next
)
8751 ts
= &ref
->u
.c
.component
->ts
;
8754 if (ts
->type
== BT_CLASS
)
8755 ts
= &ts
->u
.derived
->components
->ts
;
8761 /* Create a scalar instance of the current class type. Because the
8762 rank of a class array goes into its name, the type has to be
8763 rebuild. The alternative of (re-)setting just the attributes
8764 and as in the current type, destroys the type also in other
8768 sym
->ts
.type
= BT_CLASS
;
8769 attr
= CLASS_DATA (sym
)->attr
;
8771 attr
.associate_var
= 1;
8772 attr
.dimension
= attr
.codimension
= 0;
8773 attr
.class_pointer
= 1;
8774 if (!gfc_build_class_symbol (&sym
->ts
, &attr
, &as
))
8776 /* Make sure the _vptr is set. */
8777 c
= gfc_find_component (sym
->ts
.u
.derived
, "_vptr", true, true, NULL
);
8778 if (c
->ts
.u
.derived
== NULL
)
8779 c
->ts
.u
.derived
= gfc_find_derived_vtab (sym
->ts
.u
.derived
);
8780 CLASS_DATA (sym
)->attr
.pointer
= 1;
8781 CLASS_DATA (sym
)->attr
.class_pointer
= 1;
8782 gfc_set_sym_referenced (sym
->ts
.u
.derived
);
8783 gfc_commit_symbol (sym
->ts
.u
.derived
);
8784 /* _vptr now has the _vtab in it, change it to the _vtype. */
8785 if (c
->ts
.u
.derived
->attr
.vtab
)
8786 c
->ts
.u
.derived
= c
->ts
.u
.derived
->ts
.u
.derived
;
8787 c
->ts
.u
.derived
->ns
->types_resolved
= 0;
8788 resolve_types (c
->ts
.u
.derived
->ns
);
8792 /* Mark this as an associate variable. */
8793 sym
->attr
.associate_var
= 1;
8795 /* Fix up the type-spec for CHARACTER types. */
8796 if (sym
->ts
.type
== BT_CHARACTER
&& !sym
->attr
.select_type_temporary
)
8799 sym
->ts
.u
.cl
= target
->ts
.u
.cl
;
8801 if (sym
->ts
.deferred
&& target
->expr_type
== EXPR_VARIABLE
8802 && target
->symtree
->n
.sym
->attr
.dummy
8803 && sym
->ts
.u
.cl
== target
->ts
.u
.cl
)
8805 sym
->ts
.u
.cl
= gfc_new_charlen (sym
->ns
, NULL
);
8806 sym
->ts
.deferred
= 1;
8809 if (!sym
->ts
.u
.cl
->length
8810 && !sym
->ts
.deferred
8811 && target
->expr_type
== EXPR_CONSTANT
)
8813 sym
->ts
.u
.cl
->length
=
8814 gfc_get_int_expr (gfc_charlen_int_kind
, NULL
,
8815 target
->value
.character
.length
);
8817 else if ((!sym
->ts
.u
.cl
->length
8818 || sym
->ts
.u
.cl
->length
->expr_type
!= EXPR_CONSTANT
)
8819 && target
->expr_type
!= EXPR_VARIABLE
)
8821 sym
->ts
.u
.cl
= gfc_new_charlen (sym
->ns
, NULL
);
8822 sym
->ts
.deferred
= 1;
8824 /* This is reset in trans-stmt.c after the assignment
8825 of the target expression to the associate name. */
8826 sym
->attr
.allocatable
= 1;
8830 /* If the target is a good class object, so is the associate variable. */
8831 if (sym
->ts
.type
== BT_CLASS
&& gfc_expr_attr (target
).class_ok
)
8832 sym
->attr
.class_ok
= 1;
8836 /* Ensure that SELECT TYPE expressions have the correct rank and a full
8837 array reference, where necessary. The symbols are artificial and so
8838 the dimension attribute and arrayspec can also be set. In addition,
8839 sometimes the expr1 arrives as BT_DERIVED, when the symbol is BT_CLASS.
8840 This is corrected here as well.*/
8843 fixup_array_ref (gfc_expr
**expr1
, gfc_expr
*expr2
,
8844 int rank
, gfc_ref
*ref
)
8846 gfc_ref
*nref
= (*expr1
)->ref
;
8847 gfc_symbol
*sym1
= (*expr1
)->symtree
->n
.sym
;
8848 gfc_symbol
*sym2
= expr2
? expr2
->symtree
->n
.sym
: NULL
;
8849 (*expr1
)->rank
= rank
;
8850 if (sym1
->ts
.type
== BT_CLASS
)
8852 if ((*expr1
)->ts
.type
!= BT_CLASS
)
8853 (*expr1
)->ts
= sym1
->ts
;
8855 CLASS_DATA (sym1
)->attr
.dimension
= 1;
8856 if (CLASS_DATA (sym1
)->as
== NULL
&& sym2
)
8857 CLASS_DATA (sym1
)->as
8858 = gfc_copy_array_spec (CLASS_DATA (sym2
)->as
);
8862 sym1
->attr
.dimension
= 1;
8863 if (sym1
->as
== NULL
&& sym2
)
8864 sym1
->as
= gfc_copy_array_spec (sym2
->as
);
8867 for (; nref
; nref
= nref
->next
)
8868 if (nref
->next
== NULL
)
8871 if (ref
&& nref
&& nref
->type
!= REF_ARRAY
)
8872 nref
->next
= gfc_copy_ref (ref
);
8873 else if (ref
&& !nref
)
8874 (*expr1
)->ref
= gfc_copy_ref (ref
);
8879 build_loc_call (gfc_expr
*sym_expr
)
8882 loc_call
= gfc_get_expr ();
8883 loc_call
->expr_type
= EXPR_FUNCTION
;
8884 gfc_get_sym_tree ("_loc", gfc_current_ns
, &loc_call
->symtree
, false);
8885 loc_call
->symtree
->n
.sym
->attr
.flavor
= FL_PROCEDURE
;
8886 loc_call
->symtree
->n
.sym
->attr
.intrinsic
= 1;
8887 loc_call
->symtree
->n
.sym
->result
= loc_call
->symtree
->n
.sym
;
8888 gfc_commit_symbol (loc_call
->symtree
->n
.sym
);
8889 loc_call
->ts
.type
= BT_INTEGER
;
8890 loc_call
->ts
.kind
= gfc_index_integer_kind
;
8891 loc_call
->value
.function
.isym
= gfc_intrinsic_function_by_id (GFC_ISYM_LOC
);
8892 loc_call
->value
.function
.actual
= gfc_get_actual_arglist ();
8893 loc_call
->value
.function
.actual
->expr
= sym_expr
;
8894 loc_call
->where
= sym_expr
->where
;
8898 /* Resolve a SELECT TYPE statement. */
8901 resolve_select_type (gfc_code
*code
, gfc_namespace
*old_ns
)
8903 gfc_symbol
*selector_type
;
8904 gfc_code
*body
, *new_st
, *if_st
, *tail
;
8905 gfc_code
*class_is
= NULL
, *default_case
= NULL
;
8908 char name
[GFC_MAX_SYMBOL_LEN
];
8912 gfc_ref
* ref
= NULL
;
8913 gfc_expr
*selector_expr
= NULL
;
8915 ns
= code
->ext
.block
.ns
;
8918 /* Check for F03:C813. */
8919 if (code
->expr1
->ts
.type
!= BT_CLASS
8920 && !(code
->expr2
&& code
->expr2
->ts
.type
== BT_CLASS
))
8922 gfc_error ("Selector shall be polymorphic in SELECT TYPE statement "
8923 "at %L", &code
->loc
);
8927 if (!code
->expr1
->symtree
->n
.sym
->attr
.class_ok
)
8932 gfc_ref
*ref2
= NULL
;
8933 for (ref
= code
->expr2
->ref
; ref
!= NULL
; ref
= ref
->next
)
8934 if (ref
->type
== REF_COMPONENT
8935 && ref
->u
.c
.component
->ts
.type
== BT_CLASS
)
8940 if (code
->expr1
->symtree
->n
.sym
->attr
.untyped
)
8941 code
->expr1
->symtree
->n
.sym
->ts
= ref2
->u
.c
.component
->ts
;
8942 selector_type
= CLASS_DATA (ref2
->u
.c
.component
)->ts
.u
.derived
;
8946 if (code
->expr1
->symtree
->n
.sym
->attr
.untyped
)
8947 code
->expr1
->symtree
->n
.sym
->ts
= code
->expr2
->ts
;
8948 selector_type
= CLASS_DATA (code
->expr2
)->ts
.u
.derived
;
8951 if (code
->expr2
->rank
&& CLASS_DATA (code
->expr1
)->as
)
8952 CLASS_DATA (code
->expr1
)->as
->rank
= code
->expr2
->rank
;
8954 /* F2008: C803 The selector expression must not be coindexed. */
8955 if (gfc_is_coindexed (code
->expr2
))
8957 gfc_error ("Selector at %L must not be coindexed",
8958 &code
->expr2
->where
);
8965 selector_type
= CLASS_DATA (code
->expr1
)->ts
.u
.derived
;
8967 if (gfc_is_coindexed (code
->expr1
))
8969 gfc_error ("Selector at %L must not be coindexed",
8970 &code
->expr1
->where
);
8975 /* Loop over TYPE IS / CLASS IS cases. */
8976 for (body
= code
->block
; body
; body
= body
->block
)
8978 c
= body
->ext
.block
.case_list
;
8982 /* Check for repeated cases. */
8983 for (tail
= code
->block
; tail
; tail
= tail
->block
)
8985 gfc_case
*d
= tail
->ext
.block
.case_list
;
8989 if (c
->ts
.type
== d
->ts
.type
8990 && ((c
->ts
.type
== BT_DERIVED
8991 && c
->ts
.u
.derived
&& d
->ts
.u
.derived
8992 && !strcmp (c
->ts
.u
.derived
->name
,
8993 d
->ts
.u
.derived
->name
))
8994 || c
->ts
.type
== BT_UNKNOWN
8995 || (!(c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
8996 && c
->ts
.kind
== d
->ts
.kind
)))
8998 gfc_error ("TYPE IS at %L overlaps with TYPE IS at %L",
8999 &c
->where
, &d
->where
);
9005 /* Check F03:C815. */
9006 if ((c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
9007 && !selector_type
->attr
.unlimited_polymorphic
9008 && !gfc_type_is_extensible (c
->ts
.u
.derived
))
9010 gfc_error ("Derived type %qs at %L must be extensible",
9011 c
->ts
.u
.derived
->name
, &c
->where
);
9016 /* Check F03:C816. */
9017 if (c
->ts
.type
!= BT_UNKNOWN
&& !selector_type
->attr
.unlimited_polymorphic
9018 && ((c
->ts
.type
!= BT_DERIVED
&& c
->ts
.type
!= BT_CLASS
)
9019 || !gfc_type_is_extension_of (selector_type
, c
->ts
.u
.derived
)))
9021 if (c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
9022 gfc_error ("Derived type %qs at %L must be an extension of %qs",
9023 c
->ts
.u
.derived
->name
, &c
->where
, selector_type
->name
);
9025 gfc_error ("Unexpected intrinsic type %qs at %L",
9026 gfc_basic_typename (c
->ts
.type
), &c
->where
);
9031 /* Check F03:C814. */
9032 if (c
->ts
.type
== BT_CHARACTER
9033 && (c
->ts
.u
.cl
->length
!= NULL
|| c
->ts
.deferred
))
9035 gfc_error ("The type-spec at %L shall specify that each length "
9036 "type parameter is assumed", &c
->where
);
9041 /* Intercept the DEFAULT case. */
9042 if (c
->ts
.type
== BT_UNKNOWN
)
9044 /* Check F03:C818. */
9047 gfc_error ("The DEFAULT CASE at %L cannot be followed "
9048 "by a second DEFAULT CASE at %L",
9049 &default_case
->ext
.block
.case_list
->where
, &c
->where
);
9054 default_case
= body
;
9061 /* Transform SELECT TYPE statement to BLOCK and associate selector to
9062 target if present. If there are any EXIT statements referring to the
9063 SELECT TYPE construct, this is no problem because the gfc_code
9064 reference stays the same and EXIT is equally possible from the BLOCK
9065 it is changed to. */
9066 code
->op
= EXEC_BLOCK
;
9069 gfc_association_list
* assoc
;
9071 assoc
= gfc_get_association_list ();
9072 assoc
->st
= code
->expr1
->symtree
;
9073 assoc
->target
= gfc_copy_expr (code
->expr2
);
9074 assoc
->target
->where
= code
->expr2
->where
;
9075 /* assoc->variable will be set by resolve_assoc_var. */
9077 code
->ext
.block
.assoc
= assoc
;
9078 code
->expr1
->symtree
->n
.sym
->assoc
= assoc
;
9080 resolve_assoc_var (code
->expr1
->symtree
->n
.sym
, false);
9083 code
->ext
.block
.assoc
= NULL
;
9085 /* Ensure that the selector rank and arrayspec are available to
9086 correct expressions in which they might be missing. */
9087 if (code
->expr2
&& code
->expr2
->rank
)
9089 rank
= code
->expr2
->rank
;
9090 for (ref
= code
->expr2
->ref
; ref
; ref
= ref
->next
)
9091 if (ref
->next
== NULL
)
9093 if (ref
&& ref
->type
== REF_ARRAY
)
9094 ref
= gfc_copy_ref (ref
);
9096 /* Fixup expr1 if necessary. */
9098 fixup_array_ref (&code
->expr1
, code
->expr2
, rank
, ref
);
9100 else if (code
->expr1
->rank
)
9102 rank
= code
->expr1
->rank
;
9103 for (ref
= code
->expr1
->ref
; ref
; ref
= ref
->next
)
9104 if (ref
->next
== NULL
)
9106 if (ref
&& ref
->type
== REF_ARRAY
)
9107 ref
= gfc_copy_ref (ref
);
9110 /* Add EXEC_SELECT to switch on type. */
9111 new_st
= gfc_get_code (code
->op
);
9112 new_st
->expr1
= code
->expr1
;
9113 new_st
->expr2
= code
->expr2
;
9114 new_st
->block
= code
->block
;
9115 code
->expr1
= code
->expr2
= NULL
;
9120 ns
->code
->next
= new_st
;
9122 code
->op
= EXEC_SELECT_TYPE
;
9124 /* Use the intrinsic LOC function to generate an integer expression
9125 for the vtable of the selector. Note that the rank of the selector
9126 expression has to be set to zero. */
9127 gfc_add_vptr_component (code
->expr1
);
9128 code
->expr1
->rank
= 0;
9129 code
->expr1
= build_loc_call (code
->expr1
);
9130 selector_expr
= code
->expr1
->value
.function
.actual
->expr
;
9132 /* Loop over TYPE IS / CLASS IS cases. */
9133 for (body
= code
->block
; body
; body
= body
->block
)
9137 c
= body
->ext
.block
.case_list
;
9139 /* Generate an index integer expression for address of the
9140 TYPE/CLASS vtable and store it in c->low. The hash expression
9141 is stored in c->high and is used to resolve intrinsic cases. */
9142 if (c
->ts
.type
!= BT_UNKNOWN
)
9144 if (c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
9146 vtab
= gfc_find_derived_vtab (c
->ts
.u
.derived
);
9148 c
->high
= gfc_get_int_expr (gfc_integer_4_kind
, NULL
,
9149 c
->ts
.u
.derived
->hash_value
);
9153 vtab
= gfc_find_vtab (&c
->ts
);
9154 gcc_assert (vtab
&& CLASS_DATA (vtab
)->initializer
);
9155 e
= CLASS_DATA (vtab
)->initializer
;
9156 c
->high
= gfc_copy_expr (e
);
9157 if (c
->high
->ts
.kind
!= gfc_integer_4_kind
)
9160 ts
.kind
= gfc_integer_4_kind
;
9161 ts
.type
= BT_INTEGER
;
9162 gfc_convert_type_warn (c
->high
, &ts
, 2, 0);
9166 e
= gfc_lval_expr_from_sym (vtab
);
9167 c
->low
= build_loc_call (e
);
9172 /* Associate temporary to selector. This should only be done
9173 when this case is actually true, so build a new ASSOCIATE
9174 that does precisely this here (instead of using the
9177 if (c
->ts
.type
== BT_CLASS
)
9178 sprintf (name
, "__tmp_class_%s", c
->ts
.u
.derived
->name
);
9179 else if (c
->ts
.type
== BT_DERIVED
)
9180 sprintf (name
, "__tmp_type_%s", c
->ts
.u
.derived
->name
);
9181 else if (c
->ts
.type
== BT_CHARACTER
)
9183 HOST_WIDE_INT charlen
= 0;
9184 if (c
->ts
.u
.cl
&& c
->ts
.u
.cl
->length
9185 && c
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
)
9186 charlen
= gfc_mpz_get_hwi (c
->ts
.u
.cl
->length
->value
.integer
);
9187 snprintf (name
, sizeof (name
),
9188 "__tmp_%s_" HOST_WIDE_INT_PRINT_DEC
"_%d",
9189 gfc_basic_typename (c
->ts
.type
), charlen
, c
->ts
.kind
);
9192 sprintf (name
, "__tmp_%s_%d", gfc_basic_typename (c
->ts
.type
),
9195 st
= gfc_find_symtree (ns
->sym_root
, name
);
9196 gcc_assert (st
->n
.sym
->assoc
);
9197 st
->n
.sym
->assoc
->target
= gfc_get_variable_expr (selector_expr
->symtree
);
9198 st
->n
.sym
->assoc
->target
->where
= selector_expr
->where
;
9199 if (c
->ts
.type
!= BT_CLASS
&& c
->ts
.type
!= BT_UNKNOWN
)
9201 gfc_add_data_component (st
->n
.sym
->assoc
->target
);
9202 /* Fixup the target expression if necessary. */
9204 fixup_array_ref (&st
->n
.sym
->assoc
->target
, NULL
, rank
, ref
);
9207 new_st
= gfc_get_code (EXEC_BLOCK
);
9208 new_st
->ext
.block
.ns
= gfc_build_block_ns (ns
);
9209 new_st
->ext
.block
.ns
->code
= body
->next
;
9210 body
->next
= new_st
;
9212 /* Chain in the new list only if it is marked as dangling. Otherwise
9213 there is a CASE label overlap and this is already used. Just ignore,
9214 the error is diagnosed elsewhere. */
9215 if (st
->n
.sym
->assoc
->dangling
)
9217 new_st
->ext
.block
.assoc
= st
->n
.sym
->assoc
;
9218 st
->n
.sym
->assoc
->dangling
= 0;
9221 resolve_assoc_var (st
->n
.sym
, false);
9224 /* Take out CLASS IS cases for separate treatment. */
9226 while (body
&& body
->block
)
9228 if (body
->block
->ext
.block
.case_list
->ts
.type
== BT_CLASS
)
9230 /* Add to class_is list. */
9231 if (class_is
== NULL
)
9233 class_is
= body
->block
;
9238 for (tail
= class_is
; tail
->block
; tail
= tail
->block
) ;
9239 tail
->block
= body
->block
;
9242 /* Remove from EXEC_SELECT list. */
9243 body
->block
= body
->block
->block
;
9256 /* Add a default case to hold the CLASS IS cases. */
9257 for (tail
= code
; tail
->block
; tail
= tail
->block
) ;
9258 tail
->block
= gfc_get_code (EXEC_SELECT_TYPE
);
9260 tail
->ext
.block
.case_list
= gfc_get_case ();
9261 tail
->ext
.block
.case_list
->ts
.type
= BT_UNKNOWN
;
9263 default_case
= tail
;
9266 /* More than one CLASS IS block? */
9267 if (class_is
->block
)
9271 /* Sort CLASS IS blocks by extension level. */
9275 for (c1
= &class_is
; (*c1
) && (*c1
)->block
; c1
= &((*c1
)->block
))
9278 /* F03:C817 (check for doubles). */
9279 if ((*c1
)->ext
.block
.case_list
->ts
.u
.derived
->hash_value
9280 == c2
->ext
.block
.case_list
->ts
.u
.derived
->hash_value
)
9282 gfc_error ("Double CLASS IS block in SELECT TYPE "
9284 &c2
->ext
.block
.case_list
->where
);
9287 if ((*c1
)->ext
.block
.case_list
->ts
.u
.derived
->attr
.extension
9288 < c2
->ext
.block
.case_list
->ts
.u
.derived
->attr
.extension
)
9291 (*c1
)->block
= c2
->block
;
9301 /* Generate IF chain. */
9302 if_st
= gfc_get_code (EXEC_IF
);
9304 for (body
= class_is
; body
; body
= body
->block
)
9306 new_st
->block
= gfc_get_code (EXEC_IF
);
9307 new_st
= new_st
->block
;
9308 /* Set up IF condition: Call _gfortran_is_extension_of. */
9309 new_st
->expr1
= gfc_get_expr ();
9310 new_st
->expr1
->expr_type
= EXPR_FUNCTION
;
9311 new_st
->expr1
->ts
.type
= BT_LOGICAL
;
9312 new_st
->expr1
->ts
.kind
= 4;
9313 new_st
->expr1
->value
.function
.name
= gfc_get_string (PREFIX ("is_extension_of"));
9314 new_st
->expr1
->value
.function
.isym
= XCNEW (gfc_intrinsic_sym
);
9315 new_st
->expr1
->value
.function
.isym
->id
= GFC_ISYM_EXTENDS_TYPE_OF
;
9316 /* Set up arguments. */
9317 new_st
->expr1
->value
.function
.actual
= gfc_get_actual_arglist ();
9318 new_st
->expr1
->value
.function
.actual
->expr
= gfc_get_variable_expr (selector_expr
->symtree
);
9319 new_st
->expr1
->value
.function
.actual
->expr
->where
= code
->loc
;
9320 new_st
->expr1
->where
= code
->loc
;
9321 gfc_add_vptr_component (new_st
->expr1
->value
.function
.actual
->expr
);
9322 vtab
= gfc_find_derived_vtab (body
->ext
.block
.case_list
->ts
.u
.derived
);
9323 st
= gfc_find_symtree (vtab
->ns
->sym_root
, vtab
->name
);
9324 new_st
->expr1
->value
.function
.actual
->next
= gfc_get_actual_arglist ();
9325 new_st
->expr1
->value
.function
.actual
->next
->expr
= gfc_get_variable_expr (st
);
9326 new_st
->expr1
->value
.function
.actual
->next
->expr
->where
= code
->loc
;
9327 new_st
->next
= body
->next
;
9329 if (default_case
->next
)
9331 new_st
->block
= gfc_get_code (EXEC_IF
);
9332 new_st
= new_st
->block
;
9333 new_st
->next
= default_case
->next
;
9336 /* Replace CLASS DEFAULT code by the IF chain. */
9337 default_case
->next
= if_st
;
9340 /* Resolve the internal code. This cannot be done earlier because
9341 it requires that the sym->assoc of selectors is set already. */
9342 gfc_current_ns
= ns
;
9343 gfc_resolve_blocks (code
->block
, gfc_current_ns
);
9344 gfc_current_ns
= old_ns
;
9351 /* Resolve a transfer statement. This is making sure that:
9352 -- a derived type being transferred has only non-pointer components
9353 -- a derived type being transferred doesn't have private components, unless
9354 it's being transferred from the module where the type was defined
9355 -- we're not trying to transfer a whole assumed size array. */
9358 resolve_transfer (gfc_code
*code
)
9360 gfc_symbol
*sym
, *derived
;
9364 bool formatted
= false;
9365 gfc_dt
*dt
= code
->ext
.dt
;
9366 gfc_symbol
*dtio_sub
= NULL
;
9370 while (exp
!= NULL
&& exp
->expr_type
== EXPR_OP
9371 && exp
->value
.op
.op
== INTRINSIC_PARENTHESES
)
9372 exp
= exp
->value
.op
.op1
;
9374 if (exp
&& exp
->expr_type
== EXPR_NULL
9377 gfc_error ("Invalid context for NULL () intrinsic at %L",
9382 if (exp
== NULL
|| (exp
->expr_type
!= EXPR_VARIABLE
9383 && exp
->expr_type
!= EXPR_FUNCTION
9384 && exp
->expr_type
!= EXPR_STRUCTURE
))
9387 /* If we are reading, the variable will be changed. Note that
9388 code->ext.dt may be NULL if the TRANSFER is related to
9389 an INQUIRE statement -- but in this case, we are not reading, either. */
9390 if (dt
&& dt
->dt_io_kind
->value
.iokind
== M_READ
9391 && !gfc_check_vardef_context (exp
, false, false, false,
9395 const gfc_typespec
*ts
= exp
->expr_type
== EXPR_STRUCTURE
9396 || exp
->expr_type
== EXPR_FUNCTION
9397 ? &exp
->ts
: &exp
->symtree
->n
.sym
->ts
;
9399 /* Go to actual component transferred. */
9400 for (ref
= exp
->ref
; ref
; ref
= ref
->next
)
9401 if (ref
->type
== REF_COMPONENT
)
9402 ts
= &ref
->u
.c
.component
->ts
;
9404 if (dt
&& dt
->dt_io_kind
->value
.iokind
!= M_INQUIRE
9405 && (ts
->type
== BT_DERIVED
|| ts
->type
== BT_CLASS
))
9407 derived
= ts
->u
.derived
;
9409 /* Determine when to use the formatted DTIO procedure. */
9410 if (dt
&& (dt
->format_expr
|| dt
->format_label
))
9413 write
= dt
->dt_io_kind
->value
.iokind
== M_WRITE
9414 || dt
->dt_io_kind
->value
.iokind
== M_PRINT
;
9415 dtio_sub
= gfc_find_specific_dtio_proc (derived
, write
, formatted
);
9417 if (dtio_sub
!= NULL
&& exp
->expr_type
== EXPR_VARIABLE
)
9420 sym
= exp
->symtree
->n
.sym
->ns
->proc_name
;
9421 /* Check to see if this is a nested DTIO call, with the
9422 dummy as the io-list object. */
9423 if (sym
&& sym
== dtio_sub
&& sym
->formal
9424 && sym
->formal
->sym
== exp
->symtree
->n
.sym
9425 && exp
->ref
== NULL
)
9427 if (!sym
->attr
.recursive
)
9429 gfc_error ("DTIO %s procedure at %L must be recursive",
9430 sym
->name
, &sym
->declared_at
);
9437 if (ts
->type
== BT_CLASS
&& dtio_sub
== NULL
)
9439 gfc_error ("Data transfer element at %L cannot be polymorphic unless "
9440 "it is processed by a defined input/output procedure",
9445 if (ts
->type
== BT_DERIVED
)
9447 /* Check that transferred derived type doesn't contain POINTER
9448 components unless it is processed by a defined input/output
9450 if (ts
->u
.derived
->attr
.pointer_comp
&& dtio_sub
== NULL
)
9452 gfc_error ("Data transfer element at %L cannot have POINTER "
9453 "components unless it is processed by a defined "
9454 "input/output procedure", &code
->loc
);
9459 if (ts
->u
.derived
->attr
.proc_pointer_comp
)
9461 gfc_error ("Data transfer element at %L cannot have "
9462 "procedure pointer components", &code
->loc
);
9466 if (ts
->u
.derived
->attr
.alloc_comp
&& dtio_sub
== NULL
)
9468 gfc_error ("Data transfer element at %L cannot have ALLOCATABLE "
9469 "components unless it is processed by a defined "
9470 "input/output procedure", &code
->loc
);
9474 /* C_PTR and C_FUNPTR have private components which means they cannot
9475 be printed. However, if -std=gnu and not -pedantic, allow
9476 the component to be printed to help debugging. */
9477 if (ts
->u
.derived
->ts
.f90_type
== BT_VOID
)
9479 if (!gfc_notify_std (GFC_STD_GNU
, "Data transfer element at %L "
9480 "cannot have PRIVATE components", &code
->loc
))
9483 else if (derived_inaccessible (ts
->u
.derived
) && dtio_sub
== NULL
)
9485 gfc_error ("Data transfer element at %L cannot have "
9486 "PRIVATE components unless it is processed by "
9487 "a defined input/output procedure", &code
->loc
);
9492 if (exp
->expr_type
== EXPR_STRUCTURE
)
9495 sym
= exp
->symtree
->n
.sym
;
9497 if (sym
->as
!= NULL
&& sym
->as
->type
== AS_ASSUMED_SIZE
&& exp
->ref
9498 && exp
->ref
->type
== REF_ARRAY
&& exp
->ref
->u
.ar
.type
== AR_FULL
)
9500 gfc_error ("Data transfer element at %L cannot be a full reference to "
9501 "an assumed-size array", &code
->loc
);
9505 if (async_io_dt
&& exp
->expr_type
== EXPR_VARIABLE
)
9506 exp
->symtree
->n
.sym
->attr
.asynchronous
= 1;
9510 /*********** Toplevel code resolution subroutines ***********/
9512 /* Find the set of labels that are reachable from this block. We also
9513 record the last statement in each block. */
9516 find_reachable_labels (gfc_code
*block
)
9523 cs_base
->reachable_labels
= bitmap_alloc (&labels_obstack
);
9525 /* Collect labels in this block. We don't keep those corresponding
9526 to END {IF|SELECT}, these are checked in resolve_branch by going
9527 up through the code_stack. */
9528 for (c
= block
; c
; c
= c
->next
)
9530 if (c
->here
&& c
->op
!= EXEC_END_NESTED_BLOCK
)
9531 bitmap_set_bit (cs_base
->reachable_labels
, c
->here
->value
);
9534 /* Merge with labels from parent block. */
9537 gcc_assert (cs_base
->prev
->reachable_labels
);
9538 bitmap_ior_into (cs_base
->reachable_labels
,
9539 cs_base
->prev
->reachable_labels
);
9545 resolve_lock_unlock_event (gfc_code
*code
)
9547 if (code
->expr1
->expr_type
== EXPR_FUNCTION
9548 && code
->expr1
->value
.function
.isym
9549 && code
->expr1
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
)
9550 remove_caf_get_intrinsic (code
->expr1
);
9552 if ((code
->op
== EXEC_LOCK
|| code
->op
== EXEC_UNLOCK
)
9553 && (code
->expr1
->ts
.type
!= BT_DERIVED
9554 || code
->expr1
->expr_type
!= EXPR_VARIABLE
9555 || code
->expr1
->ts
.u
.derived
->from_intmod
!= INTMOD_ISO_FORTRAN_ENV
9556 || code
->expr1
->ts
.u
.derived
->intmod_sym_id
!= ISOFORTRAN_LOCK_TYPE
9557 || code
->expr1
->rank
!= 0
9558 || (!gfc_is_coarray (code
->expr1
) &&
9559 !gfc_is_coindexed (code
->expr1
))))
9560 gfc_error ("Lock variable at %L must be a scalar of type LOCK_TYPE",
9561 &code
->expr1
->where
);
9562 else if ((code
->op
== EXEC_EVENT_POST
|| code
->op
== EXEC_EVENT_WAIT
)
9563 && (code
->expr1
->ts
.type
!= BT_DERIVED
9564 || code
->expr1
->expr_type
!= EXPR_VARIABLE
9565 || code
->expr1
->ts
.u
.derived
->from_intmod
9566 != INTMOD_ISO_FORTRAN_ENV
9567 || code
->expr1
->ts
.u
.derived
->intmod_sym_id
9568 != ISOFORTRAN_EVENT_TYPE
9569 || code
->expr1
->rank
!= 0))
9570 gfc_error ("Event variable at %L must be a scalar of type EVENT_TYPE",
9571 &code
->expr1
->where
);
9572 else if (code
->op
== EXEC_EVENT_POST
&& !gfc_is_coarray (code
->expr1
)
9573 && !gfc_is_coindexed (code
->expr1
))
9574 gfc_error ("Event variable argument at %L must be a coarray or coindexed",
9575 &code
->expr1
->where
);
9576 else if (code
->op
== EXEC_EVENT_WAIT
&& !gfc_is_coarray (code
->expr1
))
9577 gfc_error ("Event variable argument at %L must be a coarray but not "
9578 "coindexed", &code
->expr1
->where
);
9582 && (code
->expr2
->ts
.type
!= BT_INTEGER
|| code
->expr2
->rank
!= 0
9583 || code
->expr2
->expr_type
!= EXPR_VARIABLE
))
9584 gfc_error ("STAT= argument at %L must be a scalar INTEGER variable",
9585 &code
->expr2
->where
);
9588 && !gfc_check_vardef_context (code
->expr2
, false, false, false,
9589 _("STAT variable")))
9594 && (code
->expr3
->ts
.type
!= BT_CHARACTER
|| code
->expr3
->rank
!= 0
9595 || code
->expr3
->expr_type
!= EXPR_VARIABLE
))
9596 gfc_error ("ERRMSG= argument at %L must be a scalar CHARACTER variable",
9597 &code
->expr3
->where
);
9600 && !gfc_check_vardef_context (code
->expr3
, false, false, false,
9601 _("ERRMSG variable")))
9604 /* Check for LOCK the ACQUIRED_LOCK. */
9605 if (code
->op
!= EXEC_EVENT_WAIT
&& code
->expr4
9606 && (code
->expr4
->ts
.type
!= BT_LOGICAL
|| code
->expr4
->rank
!= 0
9607 || code
->expr4
->expr_type
!= EXPR_VARIABLE
))
9608 gfc_error ("ACQUIRED_LOCK= argument at %L must be a scalar LOGICAL "
9609 "variable", &code
->expr4
->where
);
9611 if (code
->op
!= EXEC_EVENT_WAIT
&& code
->expr4
9612 && !gfc_check_vardef_context (code
->expr4
, false, false, false,
9613 _("ACQUIRED_LOCK variable")))
9616 /* Check for EVENT WAIT the UNTIL_COUNT. */
9617 if (code
->op
== EXEC_EVENT_WAIT
&& code
->expr4
)
9619 if (!gfc_resolve_expr (code
->expr4
) || code
->expr4
->ts
.type
!= BT_INTEGER
9620 || code
->expr4
->rank
!= 0)
9621 gfc_error ("UNTIL_COUNT= argument at %L must be a scalar INTEGER "
9622 "expression", &code
->expr4
->where
);
9628 resolve_critical (gfc_code
*code
)
9630 gfc_symtree
*symtree
;
9631 gfc_symbol
*lock_type
;
9632 char name
[GFC_MAX_SYMBOL_LEN
];
9633 static int serial
= 0;
9635 if (flag_coarray
!= GFC_FCOARRAY_LIB
)
9638 symtree
= gfc_find_symtree (gfc_current_ns
->sym_root
,
9639 GFC_PREFIX ("lock_type"));
9641 lock_type
= symtree
->n
.sym
;
9644 if (gfc_get_sym_tree (GFC_PREFIX ("lock_type"), gfc_current_ns
, &symtree
,
9647 lock_type
= symtree
->n
.sym
;
9648 lock_type
->attr
.flavor
= FL_DERIVED
;
9649 lock_type
->attr
.zero_comp
= 1;
9650 lock_type
->from_intmod
= INTMOD_ISO_FORTRAN_ENV
;
9651 lock_type
->intmod_sym_id
= ISOFORTRAN_LOCK_TYPE
;
9654 sprintf(name
, GFC_PREFIX ("lock_var") "%d",serial
++);
9655 if (gfc_get_sym_tree (name
, gfc_current_ns
, &symtree
, false) != 0)
9658 code
->resolved_sym
= symtree
->n
.sym
;
9659 symtree
->n
.sym
->attr
.flavor
= FL_VARIABLE
;
9660 symtree
->n
.sym
->attr
.referenced
= 1;
9661 symtree
->n
.sym
->attr
.artificial
= 1;
9662 symtree
->n
.sym
->attr
.codimension
= 1;
9663 symtree
->n
.sym
->ts
.type
= BT_DERIVED
;
9664 symtree
->n
.sym
->ts
.u
.derived
= lock_type
;
9665 symtree
->n
.sym
->as
= gfc_get_array_spec ();
9666 symtree
->n
.sym
->as
->corank
= 1;
9667 symtree
->n
.sym
->as
->type
= AS_EXPLICIT
;
9668 symtree
->n
.sym
->as
->cotype
= AS_EXPLICIT
;
9669 symtree
->n
.sym
->as
->lower
[0] = gfc_get_int_expr (gfc_default_integer_kind
,
9671 gfc_commit_symbols();
9676 resolve_sync (gfc_code
*code
)
9678 /* Check imageset. The * case matches expr1 == NULL. */
9681 if (code
->expr1
->ts
.type
!= BT_INTEGER
|| code
->expr1
->rank
> 1)
9682 gfc_error ("Imageset argument at %L must be a scalar or rank-1 "
9683 "INTEGER expression", &code
->expr1
->where
);
9684 if (code
->expr1
->expr_type
== EXPR_CONSTANT
&& code
->expr1
->rank
== 0
9685 && mpz_cmp_si (code
->expr1
->value
.integer
, 1) < 0)
9686 gfc_error ("Imageset argument at %L must between 1 and num_images()",
9687 &code
->expr1
->where
);
9688 else if (code
->expr1
->expr_type
== EXPR_ARRAY
9689 && gfc_simplify_expr (code
->expr1
, 0))
9691 gfc_constructor
*cons
;
9692 cons
= gfc_constructor_first (code
->expr1
->value
.constructor
);
9693 for (; cons
; cons
= gfc_constructor_next (cons
))
9694 if (cons
->expr
->expr_type
== EXPR_CONSTANT
9695 && mpz_cmp_si (cons
->expr
->value
.integer
, 1) < 0)
9696 gfc_error ("Imageset argument at %L must between 1 and "
9697 "num_images()", &cons
->expr
->where
);
9702 gfc_resolve_expr (code
->expr2
);
9704 && (code
->expr2
->ts
.type
!= BT_INTEGER
|| code
->expr2
->rank
!= 0
9705 || code
->expr2
->expr_type
!= EXPR_VARIABLE
))
9706 gfc_error ("STAT= argument at %L must be a scalar INTEGER variable",
9707 &code
->expr2
->where
);
9710 gfc_resolve_expr (code
->expr3
);
9712 && (code
->expr3
->ts
.type
!= BT_CHARACTER
|| code
->expr3
->rank
!= 0
9713 || code
->expr3
->expr_type
!= EXPR_VARIABLE
))
9714 gfc_error ("ERRMSG= argument at %L must be a scalar CHARACTER variable",
9715 &code
->expr3
->where
);
9719 /* Given a branch to a label, see if the branch is conforming.
9720 The code node describes where the branch is located. */
9723 resolve_branch (gfc_st_label
*label
, gfc_code
*code
)
9730 /* Step one: is this a valid branching target? */
9732 if (label
->defined
== ST_LABEL_UNKNOWN
)
9734 gfc_error ("Label %d referenced at %L is never defined", label
->value
,
9739 if (label
->defined
!= ST_LABEL_TARGET
&& label
->defined
!= ST_LABEL_DO_TARGET
)
9741 gfc_error ("Statement at %L is not a valid branch target statement "
9742 "for the branch statement at %L", &label
->where
, &code
->loc
);
9746 /* Step two: make sure this branch is not a branch to itself ;-) */
9748 if (code
->here
== label
)
9751 "Branch at %L may result in an infinite loop", &code
->loc
);
9755 /* Step three: See if the label is in the same block as the
9756 branching statement. The hard work has been done by setting up
9757 the bitmap reachable_labels. */
9759 if (bitmap_bit_p (cs_base
->reachable_labels
, label
->value
))
9761 /* Check now whether there is a CRITICAL construct; if so, check
9762 whether the label is still visible outside of the CRITICAL block,
9763 which is invalid. */
9764 for (stack
= cs_base
; stack
; stack
= stack
->prev
)
9766 if (stack
->current
->op
== EXEC_CRITICAL
9767 && bitmap_bit_p (stack
->reachable_labels
, label
->value
))
9768 gfc_error ("GOTO statement at %L leaves CRITICAL construct for "
9769 "label at %L", &code
->loc
, &label
->where
);
9770 else if (stack
->current
->op
== EXEC_DO_CONCURRENT
9771 && bitmap_bit_p (stack
->reachable_labels
, label
->value
))
9772 gfc_error ("GOTO statement at %L leaves DO CONCURRENT construct "
9773 "for label at %L", &code
->loc
, &label
->where
);
9779 /* Step four: If we haven't found the label in the bitmap, it may
9780 still be the label of the END of the enclosing block, in which
9781 case we find it by going up the code_stack. */
9783 for (stack
= cs_base
; stack
; stack
= stack
->prev
)
9785 if (stack
->current
->next
&& stack
->current
->next
->here
== label
)
9787 if (stack
->current
->op
== EXEC_CRITICAL
)
9789 /* Note: A label at END CRITICAL does not leave the CRITICAL
9790 construct as END CRITICAL is still part of it. */
9791 gfc_error ("GOTO statement at %L leaves CRITICAL construct for label"
9792 " at %L", &code
->loc
, &label
->where
);
9795 else if (stack
->current
->op
== EXEC_DO_CONCURRENT
)
9797 gfc_error ("GOTO statement at %L leaves DO CONCURRENT construct for "
9798 "label at %L", &code
->loc
, &label
->where
);
9805 gcc_assert (stack
->current
->next
->op
== EXEC_END_NESTED_BLOCK
);
9809 /* The label is not in an enclosing block, so illegal. This was
9810 allowed in Fortran 66, so we allow it as extension. No
9811 further checks are necessary in this case. */
9812 gfc_notify_std (GFC_STD_LEGACY
, "Label at %L is not in the same block "
9813 "as the GOTO statement at %L", &label
->where
,
9819 /* Check whether EXPR1 has the same shape as EXPR2. */
9822 resolve_where_shape (gfc_expr
*expr1
, gfc_expr
*expr2
)
9824 mpz_t shape
[GFC_MAX_DIMENSIONS
];
9825 mpz_t shape2
[GFC_MAX_DIMENSIONS
];
9826 bool result
= false;
9829 /* Compare the rank. */
9830 if (expr1
->rank
!= expr2
->rank
)
9833 /* Compare the size of each dimension. */
9834 for (i
=0; i
<expr1
->rank
; i
++)
9836 if (!gfc_array_dimen_size (expr1
, i
, &shape
[i
]))
9839 if (!gfc_array_dimen_size (expr2
, i
, &shape2
[i
]))
9842 if (mpz_cmp (shape
[i
], shape2
[i
]))
9846 /* When either of the two expression is an assumed size array, we
9847 ignore the comparison of dimension sizes. */
9852 gfc_clear_shape (shape
, i
);
9853 gfc_clear_shape (shape2
, i
);
9858 /* Check whether a WHERE assignment target or a WHERE mask expression
9859 has the same shape as the outmost WHERE mask expression. */
9862 resolve_where (gfc_code
*code
, gfc_expr
*mask
)
9868 cblock
= code
->block
;
9870 /* Store the first WHERE mask-expr of the WHERE statement or construct.
9871 In case of nested WHERE, only the outmost one is stored. */
9872 if (mask
== NULL
) /* outmost WHERE */
9874 else /* inner WHERE */
9881 /* Check if the mask-expr has a consistent shape with the
9882 outmost WHERE mask-expr. */
9883 if (!resolve_where_shape (cblock
->expr1
, e
))
9884 gfc_error ("WHERE mask at %L has inconsistent shape",
9885 &cblock
->expr1
->where
);
9888 /* the assignment statement of a WHERE statement, or the first
9889 statement in where-body-construct of a WHERE construct */
9890 cnext
= cblock
->next
;
9895 /* WHERE assignment statement */
9898 /* Check shape consistent for WHERE assignment target. */
9899 if (e
&& !resolve_where_shape (cnext
->expr1
, e
))
9900 gfc_error ("WHERE assignment target at %L has "
9901 "inconsistent shape", &cnext
->expr1
->where
);
9905 case EXEC_ASSIGN_CALL
:
9906 resolve_call (cnext
);
9907 if (!cnext
->resolved_sym
->attr
.elemental
)
9908 gfc_error("Non-ELEMENTAL user-defined assignment in WHERE at %L",
9909 &cnext
->ext
.actual
->expr
->where
);
9912 /* WHERE or WHERE construct is part of a where-body-construct */
9914 resolve_where (cnext
, e
);
9918 gfc_error ("Unsupported statement inside WHERE at %L",
9921 /* the next statement within the same where-body-construct */
9922 cnext
= cnext
->next
;
9924 /* the next masked-elsewhere-stmt, elsewhere-stmt, or end-where-stmt */
9925 cblock
= cblock
->block
;
9930 /* Resolve assignment in FORALL construct.
9931 NVAR is the number of FORALL index variables, and VAR_EXPR records the
9932 FORALL index variables. */
9935 gfc_resolve_assign_in_forall (gfc_code
*code
, int nvar
, gfc_expr
**var_expr
)
9939 for (n
= 0; n
< nvar
; n
++)
9941 gfc_symbol
*forall_index
;
9943 forall_index
= var_expr
[n
]->symtree
->n
.sym
;
9945 /* Check whether the assignment target is one of the FORALL index
9947 if ((code
->expr1
->expr_type
== EXPR_VARIABLE
)
9948 && (code
->expr1
->symtree
->n
.sym
== forall_index
))
9949 gfc_error ("Assignment to a FORALL index variable at %L",
9950 &code
->expr1
->where
);
9953 /* If one of the FORALL index variables doesn't appear in the
9954 assignment variable, then there could be a many-to-one
9955 assignment. Emit a warning rather than an error because the
9956 mask could be resolving this problem. */
9957 if (!find_forall_index (code
->expr1
, forall_index
, 0))
9958 gfc_warning (0, "The FORALL with index %qs is not used on the "
9959 "left side of the assignment at %L and so might "
9960 "cause multiple assignment to this object",
9961 var_expr
[n
]->symtree
->name
, &code
->expr1
->where
);
9967 /* Resolve WHERE statement in FORALL construct. */
9970 gfc_resolve_where_code_in_forall (gfc_code
*code
, int nvar
,
9971 gfc_expr
**var_expr
)
9976 cblock
= code
->block
;
9979 /* the assignment statement of a WHERE statement, or the first
9980 statement in where-body-construct of a WHERE construct */
9981 cnext
= cblock
->next
;
9986 /* WHERE assignment statement */
9988 gfc_resolve_assign_in_forall (cnext
, nvar
, var_expr
);
9991 /* WHERE operator assignment statement */
9992 case EXEC_ASSIGN_CALL
:
9993 resolve_call (cnext
);
9994 if (!cnext
->resolved_sym
->attr
.elemental
)
9995 gfc_error("Non-ELEMENTAL user-defined assignment in WHERE at %L",
9996 &cnext
->ext
.actual
->expr
->where
);
9999 /* WHERE or WHERE construct is part of a where-body-construct */
10001 gfc_resolve_where_code_in_forall (cnext
, nvar
, var_expr
);
10005 gfc_error ("Unsupported statement inside WHERE at %L",
10008 /* the next statement within the same where-body-construct */
10009 cnext
= cnext
->next
;
10011 /* the next masked-elsewhere-stmt, elsewhere-stmt, or end-where-stmt */
10012 cblock
= cblock
->block
;
10017 /* Traverse the FORALL body to check whether the following errors exist:
10018 1. For assignment, check if a many-to-one assignment happens.
10019 2. For WHERE statement, check the WHERE body to see if there is any
10020 many-to-one assignment. */
10023 gfc_resolve_forall_body (gfc_code
*code
, int nvar
, gfc_expr
**var_expr
)
10027 c
= code
->block
->next
;
10033 case EXEC_POINTER_ASSIGN
:
10034 gfc_resolve_assign_in_forall (c
, nvar
, var_expr
);
10037 case EXEC_ASSIGN_CALL
:
10041 /* Because the gfc_resolve_blocks() will handle the nested FORALL,
10042 there is no need to handle it here. */
10046 gfc_resolve_where_code_in_forall(c
, nvar
, var_expr
);
10051 /* The next statement in the FORALL body. */
10057 /* Counts the number of iterators needed inside a forall construct, including
10058 nested forall constructs. This is used to allocate the needed memory
10059 in gfc_resolve_forall. */
10062 gfc_count_forall_iterators (gfc_code
*code
)
10064 int max_iters
, sub_iters
, current_iters
;
10065 gfc_forall_iterator
*fa
;
10067 gcc_assert(code
->op
== EXEC_FORALL
);
10071 for (fa
= code
->ext
.forall_iterator
; fa
; fa
= fa
->next
)
10074 code
= code
->block
->next
;
10078 if (code
->op
== EXEC_FORALL
)
10080 sub_iters
= gfc_count_forall_iterators (code
);
10081 if (sub_iters
> max_iters
)
10082 max_iters
= sub_iters
;
10087 return current_iters
+ max_iters
;
10091 /* Given a FORALL construct, first resolve the FORALL iterator, then call
10092 gfc_resolve_forall_body to resolve the FORALL body. */
10095 gfc_resolve_forall (gfc_code
*code
, gfc_namespace
*ns
, int forall_save
)
10097 static gfc_expr
**var_expr
;
10098 static int total_var
= 0;
10099 static int nvar
= 0;
10100 int i
, old_nvar
, tmp
;
10101 gfc_forall_iterator
*fa
;
10105 if (!gfc_notify_std (GFC_STD_F2018_OBS
, "FORALL construct at %L", &code
->loc
))
10108 /* Start to resolve a FORALL construct */
10109 if (forall_save
== 0)
10111 /* Count the total number of FORALL indices in the nested FORALL
10112 construct in order to allocate the VAR_EXPR with proper size. */
10113 total_var
= gfc_count_forall_iterators (code
);
10115 /* Allocate VAR_EXPR with NUMBER_OF_FORALL_INDEX elements. */
10116 var_expr
= XCNEWVEC (gfc_expr
*, total_var
);
10119 /* The information about FORALL iterator, including FORALL indices start, end
10120 and stride. An outer FORALL indice cannot appear in start, end or stride. */
10121 for (fa
= code
->ext
.forall_iterator
; fa
; fa
= fa
->next
)
10123 /* Fortran 20008: C738 (R753). */
10124 if (fa
->var
->ref
&& fa
->var
->ref
->type
== REF_ARRAY
)
10126 gfc_error ("FORALL index-name at %L must be a scalar variable "
10127 "of type integer", &fa
->var
->where
);
10131 /* Check if any outer FORALL index name is the same as the current
10133 for (i
= 0; i
< nvar
; i
++)
10135 if (fa
->var
->symtree
->n
.sym
== var_expr
[i
]->symtree
->n
.sym
)
10136 gfc_error ("An outer FORALL construct already has an index "
10137 "with this name %L", &fa
->var
->where
);
10140 /* Record the current FORALL index. */
10141 var_expr
[nvar
] = gfc_copy_expr (fa
->var
);
10145 /* No memory leak. */
10146 gcc_assert (nvar
<= total_var
);
10149 /* Resolve the FORALL body. */
10150 gfc_resolve_forall_body (code
, nvar
, var_expr
);
10152 /* May call gfc_resolve_forall to resolve the inner FORALL loop. */
10153 gfc_resolve_blocks (code
->block
, ns
);
10157 /* Free only the VAR_EXPRs allocated in this frame. */
10158 for (i
= nvar
; i
< tmp
; i
++)
10159 gfc_free_expr (var_expr
[i
]);
10163 /* We are in the outermost FORALL construct. */
10164 gcc_assert (forall_save
== 0);
10166 /* VAR_EXPR is not needed any more. */
10173 /* Resolve a BLOCK construct statement. */
10176 resolve_block_construct (gfc_code
* code
)
10178 /* Resolve the BLOCK's namespace. */
10179 gfc_resolve (code
->ext
.block
.ns
);
10181 /* For an ASSOCIATE block, the associations (and their targets) are already
10182 resolved during resolve_symbol. */
10186 /* Resolve lists of blocks found in IF, SELECT CASE, WHERE, FORALL, GOTO and
10190 gfc_resolve_blocks (gfc_code
*b
, gfc_namespace
*ns
)
10194 for (; b
; b
= b
->block
)
10196 t
= gfc_resolve_expr (b
->expr1
);
10197 if (!gfc_resolve_expr (b
->expr2
))
10203 if (t
&& b
->expr1
!= NULL
10204 && (b
->expr1
->ts
.type
!= BT_LOGICAL
|| b
->expr1
->rank
!= 0))
10205 gfc_error ("IF clause at %L requires a scalar LOGICAL expression",
10211 && b
->expr1
!= NULL
10212 && (b
->expr1
->ts
.type
!= BT_LOGICAL
|| b
->expr1
->rank
== 0))
10213 gfc_error ("WHERE/ELSEWHERE clause at %L requires a LOGICAL array",
10218 resolve_branch (b
->label1
, b
);
10222 resolve_block_construct (b
);
10226 case EXEC_SELECT_TYPE
:
10229 case EXEC_DO_WHILE
:
10230 case EXEC_DO_CONCURRENT
:
10231 case EXEC_CRITICAL
:
10234 case EXEC_IOLENGTH
:
10238 case EXEC_OMP_ATOMIC
:
10239 case EXEC_OACC_ATOMIC
:
10241 gfc_omp_atomic_op aop
10242 = (gfc_omp_atomic_op
) (b
->ext
.omp_atomic
& GFC_OMP_ATOMIC_MASK
);
10244 /* Verify this before calling gfc_resolve_code, which might
10246 gcc_assert (b
->next
&& b
->next
->op
== EXEC_ASSIGN
);
10247 gcc_assert (((aop
!= GFC_OMP_ATOMIC_CAPTURE
)
10248 && b
->next
->next
== NULL
)
10249 || ((aop
== GFC_OMP_ATOMIC_CAPTURE
)
10250 && b
->next
->next
!= NULL
10251 && b
->next
->next
->op
== EXEC_ASSIGN
10252 && b
->next
->next
->next
== NULL
));
10256 case EXEC_OACC_PARALLEL_LOOP
:
10257 case EXEC_OACC_PARALLEL
:
10258 case EXEC_OACC_KERNELS_LOOP
:
10259 case EXEC_OACC_KERNELS
:
10260 case EXEC_OACC_DATA
:
10261 case EXEC_OACC_HOST_DATA
:
10262 case EXEC_OACC_LOOP
:
10263 case EXEC_OACC_UPDATE
:
10264 case EXEC_OACC_WAIT
:
10265 case EXEC_OACC_CACHE
:
10266 case EXEC_OACC_ENTER_DATA
:
10267 case EXEC_OACC_EXIT_DATA
:
10268 case EXEC_OACC_ROUTINE
:
10269 case EXEC_OMP_CRITICAL
:
10270 case EXEC_OMP_DISTRIBUTE
:
10271 case EXEC_OMP_DISTRIBUTE_PARALLEL_DO
:
10272 case EXEC_OMP_DISTRIBUTE_PARALLEL_DO_SIMD
:
10273 case EXEC_OMP_DISTRIBUTE_SIMD
:
10275 case EXEC_OMP_DO_SIMD
:
10276 case EXEC_OMP_MASTER
:
10277 case EXEC_OMP_ORDERED
:
10278 case EXEC_OMP_PARALLEL
:
10279 case EXEC_OMP_PARALLEL_DO
:
10280 case EXEC_OMP_PARALLEL_DO_SIMD
:
10281 case EXEC_OMP_PARALLEL_SECTIONS
:
10282 case EXEC_OMP_PARALLEL_WORKSHARE
:
10283 case EXEC_OMP_SECTIONS
:
10284 case EXEC_OMP_SIMD
:
10285 case EXEC_OMP_SINGLE
:
10286 case EXEC_OMP_TARGET
:
10287 case EXEC_OMP_TARGET_DATA
:
10288 case EXEC_OMP_TARGET_ENTER_DATA
:
10289 case EXEC_OMP_TARGET_EXIT_DATA
:
10290 case EXEC_OMP_TARGET_PARALLEL
:
10291 case EXEC_OMP_TARGET_PARALLEL_DO
:
10292 case EXEC_OMP_TARGET_PARALLEL_DO_SIMD
:
10293 case EXEC_OMP_TARGET_SIMD
:
10294 case EXEC_OMP_TARGET_TEAMS
:
10295 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE
:
10296 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO
:
10297 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
10298 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_SIMD
:
10299 case EXEC_OMP_TARGET_UPDATE
:
10300 case EXEC_OMP_TASK
:
10301 case EXEC_OMP_TASKGROUP
:
10302 case EXEC_OMP_TASKLOOP
:
10303 case EXEC_OMP_TASKLOOP_SIMD
:
10304 case EXEC_OMP_TASKWAIT
:
10305 case EXEC_OMP_TASKYIELD
:
10306 case EXEC_OMP_TEAMS
:
10307 case EXEC_OMP_TEAMS_DISTRIBUTE
:
10308 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO
:
10309 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
10310 case EXEC_OMP_TEAMS_DISTRIBUTE_SIMD
:
10311 case EXEC_OMP_WORKSHARE
:
10315 gfc_internal_error ("gfc_resolve_blocks(): Bad block type");
10318 gfc_resolve_code (b
->next
, ns
);
10323 /* Does everything to resolve an ordinary assignment. Returns true
10324 if this is an interface assignment. */
10326 resolve_ordinary_assign (gfc_code
*code
, gfc_namespace
*ns
)
10333 symbol_attribute attr
;
10335 if (gfc_extend_assign (code
, ns
))
10339 if (code
->op
== EXEC_ASSIGN_CALL
)
10341 lhs
= code
->ext
.actual
->expr
;
10342 rhsptr
= &code
->ext
.actual
->next
->expr
;
10346 gfc_actual_arglist
* args
;
10347 gfc_typebound_proc
* tbp
;
10349 gcc_assert (code
->op
== EXEC_COMPCALL
);
10351 args
= code
->expr1
->value
.compcall
.actual
;
10353 rhsptr
= &args
->next
->expr
;
10355 tbp
= code
->expr1
->value
.compcall
.tbp
;
10356 gcc_assert (!tbp
->is_generic
);
10359 /* Make a temporary rhs when there is a default initializer
10360 and rhs is the same symbol as the lhs. */
10361 if ((*rhsptr
)->expr_type
== EXPR_VARIABLE
10362 && (*rhsptr
)->symtree
->n
.sym
->ts
.type
== BT_DERIVED
10363 && gfc_has_default_initializer ((*rhsptr
)->symtree
->n
.sym
->ts
.u
.derived
)
10364 && (lhs
->symtree
->n
.sym
== (*rhsptr
)->symtree
->n
.sym
))
10365 *rhsptr
= gfc_get_parentheses (*rhsptr
);
10374 && !gfc_notify_std (GFC_STD_GNU
, "BOZ literal at %L outside "
10375 "a DATA statement and outside INT/REAL/DBLE/CMPLX",
10379 /* Handle the case of a BOZ literal on the RHS. */
10380 if (rhs
->is_boz
&& lhs
->ts
.type
!= BT_INTEGER
)
10383 if (warn_surprising
)
10384 gfc_warning (OPT_Wsurprising
,
10385 "BOZ literal at %L is bitwise transferred "
10386 "non-integer symbol %qs", &code
->loc
,
10387 lhs
->symtree
->n
.sym
->name
);
10389 if (!gfc_convert_boz (rhs
, &lhs
->ts
))
10391 if ((rc
= gfc_range_check (rhs
)) != ARITH_OK
)
10393 if (rc
== ARITH_UNDERFLOW
)
10394 gfc_error ("Arithmetic underflow of bit-wise transferred BOZ at %L"
10395 ". This check can be disabled with the option "
10396 "%<-fno-range-check%>", &rhs
->where
);
10397 else if (rc
== ARITH_OVERFLOW
)
10398 gfc_error ("Arithmetic overflow of bit-wise transferred BOZ at %L"
10399 ". This check can be disabled with the option "
10400 "%<-fno-range-check%>", &rhs
->where
);
10401 else if (rc
== ARITH_NAN
)
10402 gfc_error ("Arithmetic NaN of bit-wise transferred BOZ at %L"
10403 ". This check can be disabled with the option "
10404 "%<-fno-range-check%>", &rhs
->where
);
10409 if (lhs
->ts
.type
== BT_CHARACTER
10410 && warn_character_truncation
)
10412 HOST_WIDE_INT llen
= 0, rlen
= 0;
10413 if (lhs
->ts
.u
.cl
!= NULL
10414 && lhs
->ts
.u
.cl
->length
!= NULL
10415 && lhs
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
)
10416 llen
= gfc_mpz_get_hwi (lhs
->ts
.u
.cl
->length
->value
.integer
);
10418 if (rhs
->expr_type
== EXPR_CONSTANT
)
10419 rlen
= rhs
->value
.character
.length
;
10421 else if (rhs
->ts
.u
.cl
!= NULL
10422 && rhs
->ts
.u
.cl
->length
!= NULL
10423 && rhs
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
)
10424 rlen
= gfc_mpz_get_hwi (rhs
->ts
.u
.cl
->length
->value
.integer
);
10426 if (rlen
&& llen
&& rlen
> llen
)
10427 gfc_warning_now (OPT_Wcharacter_truncation
,
10428 "CHARACTER expression will be truncated "
10429 "in assignment (%ld/%ld) at %L",
10430 (long) llen
, (long) rlen
, &code
->loc
);
10433 /* Ensure that a vector index expression for the lvalue is evaluated
10434 to a temporary if the lvalue symbol is referenced in it. */
10437 for (ref
= lhs
->ref
; ref
; ref
= ref
->next
)
10438 if (ref
->type
== REF_ARRAY
)
10440 for (n
= 0; n
< ref
->u
.ar
.dimen
; n
++)
10441 if (ref
->u
.ar
.dimen_type
[n
] == DIMEN_VECTOR
10442 && gfc_find_sym_in_expr (lhs
->symtree
->n
.sym
,
10443 ref
->u
.ar
.start
[n
]))
10445 = gfc_get_parentheses (ref
->u
.ar
.start
[n
]);
10449 if (gfc_pure (NULL
))
10451 if (lhs
->ts
.type
== BT_DERIVED
10452 && lhs
->expr_type
== EXPR_VARIABLE
10453 && lhs
->ts
.u
.derived
->attr
.pointer_comp
10454 && rhs
->expr_type
== EXPR_VARIABLE
10455 && (gfc_impure_variable (rhs
->symtree
->n
.sym
)
10456 || gfc_is_coindexed (rhs
)))
10458 /* F2008, C1283. */
10459 if (gfc_is_coindexed (rhs
))
10460 gfc_error ("Coindexed expression at %L is assigned to "
10461 "a derived type variable with a POINTER "
10462 "component in a PURE procedure",
10465 gfc_error ("The impure variable at %L is assigned to "
10466 "a derived type variable with a POINTER "
10467 "component in a PURE procedure (12.6)",
10472 /* Fortran 2008, C1283. */
10473 if (gfc_is_coindexed (lhs
))
10475 gfc_error ("Assignment to coindexed variable at %L in a PURE "
10476 "procedure", &rhs
->where
);
10481 if (gfc_implicit_pure (NULL
))
10483 if (lhs
->expr_type
== EXPR_VARIABLE
10484 && lhs
->symtree
->n
.sym
!= gfc_current_ns
->proc_name
10485 && lhs
->symtree
->n
.sym
->ns
!= gfc_current_ns
)
10486 gfc_unset_implicit_pure (NULL
);
10488 if (lhs
->ts
.type
== BT_DERIVED
10489 && lhs
->expr_type
== EXPR_VARIABLE
10490 && lhs
->ts
.u
.derived
->attr
.pointer_comp
10491 && rhs
->expr_type
== EXPR_VARIABLE
10492 && (gfc_impure_variable (rhs
->symtree
->n
.sym
)
10493 || gfc_is_coindexed (rhs
)))
10494 gfc_unset_implicit_pure (NULL
);
10496 /* Fortran 2008, C1283. */
10497 if (gfc_is_coindexed (lhs
))
10498 gfc_unset_implicit_pure (NULL
);
10501 /* F2008, 7.2.1.2. */
10502 attr
= gfc_expr_attr (lhs
);
10503 if (lhs
->ts
.type
== BT_CLASS
&& attr
.allocatable
)
10505 if (attr
.codimension
)
10507 gfc_error ("Assignment to polymorphic coarray at %L is not "
10508 "permitted", &lhs
->where
);
10511 if (!gfc_notify_std (GFC_STD_F2008
, "Assignment to an allocatable "
10512 "polymorphic variable at %L", &lhs
->where
))
10514 if (!flag_realloc_lhs
)
10516 gfc_error ("Assignment to an allocatable polymorphic variable at %L "
10517 "requires %<-frealloc-lhs%>", &lhs
->where
);
10521 else if (lhs
->ts
.type
== BT_CLASS
)
10523 gfc_error ("Nonallocatable variable must not be polymorphic in intrinsic "
10524 "assignment at %L - check that there is a matching specific "
10525 "subroutine for '=' operator", &lhs
->where
);
10529 bool lhs_coindexed
= gfc_is_coindexed (lhs
);
10531 /* F2008, Section 7.2.1.2. */
10532 if (lhs_coindexed
&& gfc_has_ultimate_allocatable (lhs
))
10534 gfc_error ("Coindexed variable must not have an allocatable ultimate "
10535 "component in assignment at %L", &lhs
->where
);
10539 /* Assign the 'data' of a class object to a derived type. */
10540 if (lhs
->ts
.type
== BT_DERIVED
10541 && rhs
->ts
.type
== BT_CLASS
10542 && rhs
->expr_type
!= EXPR_ARRAY
)
10543 gfc_add_data_component (rhs
);
10545 /* Make sure there is a vtable and, in particular, a _copy for the
10547 if (UNLIMITED_POLY (lhs
) && lhs
->rank
&& rhs
->ts
.type
!= BT_CLASS
)
10548 gfc_find_vtab (&rhs
->ts
);
10550 bool caf_convert_to_send
= flag_coarray
== GFC_FCOARRAY_LIB
10552 || (code
->expr2
->expr_type
== EXPR_FUNCTION
10553 && code
->expr2
->value
.function
.isym
10554 && code
->expr2
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
10555 && (code
->expr1
->rank
== 0 || code
->expr2
->rank
!= 0)
10556 && !gfc_expr_attr (rhs
).allocatable
10557 && !gfc_has_vector_subscript (rhs
)));
10559 gfc_check_assign (lhs
, rhs
, 1, !caf_convert_to_send
);
10561 /* Insert a GFC_ISYM_CAF_SEND intrinsic, when the LHS is a coindexed variable.
10562 Additionally, insert this code when the RHS is a CAF as we then use the
10563 GFC_ISYM_CAF_SEND intrinsic just to avoid a temporary; but do not do so if
10564 the LHS is (re)allocatable or has a vector subscript. If the LHS is a
10565 noncoindexed array and the RHS is a coindexed scalar, use the normal code
10567 if (caf_convert_to_send
)
10569 if (code
->expr2
->expr_type
== EXPR_FUNCTION
10570 && code
->expr2
->value
.function
.isym
10571 && code
->expr2
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
)
10572 remove_caf_get_intrinsic (code
->expr2
);
10573 code
->op
= EXEC_CALL
;
10574 gfc_get_sym_tree (GFC_PREFIX ("caf_send"), ns
, &code
->symtree
, true);
10575 code
->resolved_sym
= code
->symtree
->n
.sym
;
10576 code
->resolved_sym
->attr
.flavor
= FL_PROCEDURE
;
10577 code
->resolved_sym
->attr
.intrinsic
= 1;
10578 code
->resolved_sym
->attr
.subroutine
= 1;
10579 code
->resolved_isym
= gfc_intrinsic_subroutine_by_id (GFC_ISYM_CAF_SEND
);
10580 gfc_commit_symbol (code
->resolved_sym
);
10581 code
->ext
.actual
= gfc_get_actual_arglist ();
10582 code
->ext
.actual
->expr
= lhs
;
10583 code
->ext
.actual
->next
= gfc_get_actual_arglist ();
10584 code
->ext
.actual
->next
->expr
= rhs
;
10585 code
->expr1
= NULL
;
10586 code
->expr2
= NULL
;
10593 /* Add a component reference onto an expression. */
10596 add_comp_ref (gfc_expr
*e
, gfc_component
*c
)
10601 ref
= &((*ref
)->next
);
10602 *ref
= gfc_get_ref ();
10603 (*ref
)->type
= REF_COMPONENT
;
10604 (*ref
)->u
.c
.sym
= e
->ts
.u
.derived
;
10605 (*ref
)->u
.c
.component
= c
;
10608 /* Add a full array ref, as necessary. */
10611 gfc_add_full_array_ref (e
, c
->as
);
10612 e
->rank
= c
->as
->rank
;
10617 /* Build an assignment. Keep the argument 'op' for future use, so that
10618 pointer assignments can be made. */
10621 build_assignment (gfc_exec_op op
, gfc_expr
*expr1
, gfc_expr
*expr2
,
10622 gfc_component
*comp1
, gfc_component
*comp2
, locus loc
)
10624 gfc_code
*this_code
;
10626 this_code
= gfc_get_code (op
);
10627 this_code
->next
= NULL
;
10628 this_code
->expr1
= gfc_copy_expr (expr1
);
10629 this_code
->expr2
= gfc_copy_expr (expr2
);
10630 this_code
->loc
= loc
;
10631 if (comp1
&& comp2
)
10633 add_comp_ref (this_code
->expr1
, comp1
);
10634 add_comp_ref (this_code
->expr2
, comp2
);
10641 /* Makes a temporary variable expression based on the characteristics of
10642 a given variable expression. */
10645 get_temp_from_expr (gfc_expr
*e
, gfc_namespace
*ns
)
10647 static int serial
= 0;
10648 char name
[GFC_MAX_SYMBOL_LEN
];
10650 gfc_array_spec
*as
;
10651 gfc_array_ref
*aref
;
10654 sprintf (name
, GFC_PREFIX("DA%d"), serial
++);
10655 gfc_get_sym_tree (name
, ns
, &tmp
, false);
10656 gfc_add_type (tmp
->n
.sym
, &e
->ts
, NULL
);
10658 if (e
->expr_type
== EXPR_CONSTANT
&& e
->ts
.type
== BT_CHARACTER
)
10659 tmp
->n
.sym
->ts
.u
.cl
->length
= gfc_get_int_expr (gfc_charlen_int_kind
,
10661 e
->value
.character
.length
);
10667 /* Obtain the arrayspec for the temporary. */
10668 if (e
->rank
&& e
->expr_type
!= EXPR_ARRAY
10669 && e
->expr_type
!= EXPR_FUNCTION
10670 && e
->expr_type
!= EXPR_OP
)
10672 aref
= gfc_find_array_ref (e
);
10673 if (e
->expr_type
== EXPR_VARIABLE
10674 && e
->symtree
->n
.sym
->as
== aref
->as
)
10678 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
10679 if (ref
->type
== REF_COMPONENT
10680 && ref
->u
.c
.component
->as
== aref
->as
)
10688 /* Add the attributes and the arrayspec to the temporary. */
10689 tmp
->n
.sym
->attr
= gfc_expr_attr (e
);
10690 tmp
->n
.sym
->attr
.function
= 0;
10691 tmp
->n
.sym
->attr
.result
= 0;
10692 tmp
->n
.sym
->attr
.flavor
= FL_VARIABLE
;
10693 tmp
->n
.sym
->attr
.dummy
= 0;
10694 tmp
->n
.sym
->attr
.intent
= INTENT_UNKNOWN
;
10698 tmp
->n
.sym
->as
= gfc_copy_array_spec (as
);
10701 if (as
->type
== AS_DEFERRED
)
10702 tmp
->n
.sym
->attr
.allocatable
= 1;
10704 else if (e
->rank
&& (e
->expr_type
== EXPR_ARRAY
10705 || e
->expr_type
== EXPR_FUNCTION
10706 || e
->expr_type
== EXPR_OP
))
10708 tmp
->n
.sym
->as
= gfc_get_array_spec ();
10709 tmp
->n
.sym
->as
->type
= AS_DEFERRED
;
10710 tmp
->n
.sym
->as
->rank
= e
->rank
;
10711 tmp
->n
.sym
->attr
.allocatable
= 1;
10712 tmp
->n
.sym
->attr
.dimension
= 1;
10715 tmp
->n
.sym
->attr
.dimension
= 0;
10717 gfc_set_sym_referenced (tmp
->n
.sym
);
10718 gfc_commit_symbol (tmp
->n
.sym
);
10719 e
= gfc_lval_expr_from_sym (tmp
->n
.sym
);
10721 /* Should the lhs be a section, use its array ref for the
10722 temporary expression. */
10723 if (aref
&& aref
->type
!= AR_FULL
)
10725 gfc_free_ref_list (e
->ref
);
10726 e
->ref
= gfc_copy_ref (ref
);
10732 /* Add one line of code to the code chain, making sure that 'head' and
10733 'tail' are appropriately updated. */
10736 add_code_to_chain (gfc_code
**this_code
, gfc_code
**head
, gfc_code
**tail
)
10738 gcc_assert (this_code
);
10740 *head
= *tail
= *this_code
;
10742 *tail
= gfc_append_code (*tail
, *this_code
);
10747 /* Counts the potential number of part array references that would
10748 result from resolution of typebound defined assignments. */
10751 nonscalar_typebound_assign (gfc_symbol
*derived
, int depth
)
10754 int c_depth
= 0, t_depth
;
10756 for (c
= derived
->components
; c
; c
= c
->next
)
10758 if ((!gfc_bt_struct (c
->ts
.type
)
10760 || c
->attr
.allocatable
10761 || c
->attr
.proc_pointer_comp
10762 || c
->attr
.class_pointer
10763 || c
->attr
.proc_pointer
)
10764 && !c
->attr
.defined_assign_comp
)
10767 if (c
->as
&& c_depth
== 0)
10770 if (c
->ts
.u
.derived
->attr
.defined_assign_comp
)
10771 t_depth
= nonscalar_typebound_assign (c
->ts
.u
.derived
,
10776 c_depth
= t_depth
> c_depth
? t_depth
: c_depth
;
10778 return depth
+ c_depth
;
10782 /* Implement 7.2.1.3 of the F08 standard:
10783 "An intrinsic assignment where the variable is of derived type is
10784 performed as if each component of the variable were assigned from the
10785 corresponding component of expr using pointer assignment (7.2.2) for
10786 each pointer component, defined assignment for each nonpointer
10787 nonallocatable component of a type that has a type-bound defined
10788 assignment consistent with the component, intrinsic assignment for
10789 each other nonpointer nonallocatable component, ..."
10791 The pointer assignments are taken care of by the intrinsic
10792 assignment of the structure itself. This function recursively adds
10793 defined assignments where required. The recursion is accomplished
10794 by calling gfc_resolve_code.
10796 When the lhs in a defined assignment has intent INOUT, we need a
10797 temporary for the lhs. In pseudo-code:
10799 ! Only call function lhs once.
10800 if (lhs is not a constant or an variable)
10803 ! Do the intrinsic assignment
10805 ! Now do the defined assignments
10806 do over components with typebound defined assignment [%cmp]
10807 #if one component's assignment procedure is INOUT
10809 #if expr2 non-variable
10815 t1%cmp {defined=} expr2%cmp
10821 expr1%cmp {defined=} expr2%cmp
10825 /* The temporary assignments have to be put on top of the additional
10826 code to avoid the result being changed by the intrinsic assignment.
10828 static int component_assignment_level
= 0;
10829 static gfc_code
*tmp_head
= NULL
, *tmp_tail
= NULL
;
10832 generate_component_assignments (gfc_code
**code
, gfc_namespace
*ns
)
10834 gfc_component
*comp1
, *comp2
;
10835 gfc_code
*this_code
= NULL
, *head
= NULL
, *tail
= NULL
;
10837 int error_count
, depth
;
10839 gfc_get_errors (NULL
, &error_count
);
10841 /* Filter out continuing processing after an error. */
10843 || (*code
)->expr1
->ts
.type
!= BT_DERIVED
10844 || (*code
)->expr2
->ts
.type
!= BT_DERIVED
)
10847 /* TODO: Handle more than one part array reference in assignments. */
10848 depth
= nonscalar_typebound_assign ((*code
)->expr1
->ts
.u
.derived
,
10849 (*code
)->expr1
->rank
? 1 : 0);
10852 gfc_warning (0, "TODO: type-bound defined assignment(s) at %L not "
10853 "done because multiple part array references would "
10854 "occur in intermediate expressions.", &(*code
)->loc
);
10858 component_assignment_level
++;
10860 /* Create a temporary so that functions get called only once. */
10861 if ((*code
)->expr2
->expr_type
!= EXPR_VARIABLE
10862 && (*code
)->expr2
->expr_type
!= EXPR_CONSTANT
)
10864 gfc_expr
*tmp_expr
;
10866 /* Assign the rhs to the temporary. */
10867 tmp_expr
= get_temp_from_expr ((*code
)->expr1
, ns
);
10868 this_code
= build_assignment (EXEC_ASSIGN
,
10869 tmp_expr
, (*code
)->expr2
,
10870 NULL
, NULL
, (*code
)->loc
);
10871 /* Add the code and substitute the rhs expression. */
10872 add_code_to_chain (&this_code
, &tmp_head
, &tmp_tail
);
10873 gfc_free_expr ((*code
)->expr2
);
10874 (*code
)->expr2
= tmp_expr
;
10877 /* Do the intrinsic assignment. This is not needed if the lhs is one
10878 of the temporaries generated here, since the intrinsic assignment
10879 to the final result already does this. */
10880 if ((*code
)->expr1
->symtree
->n
.sym
->name
[2] != '@')
10882 this_code
= build_assignment (EXEC_ASSIGN
,
10883 (*code
)->expr1
, (*code
)->expr2
,
10884 NULL
, NULL
, (*code
)->loc
);
10885 add_code_to_chain (&this_code
, &head
, &tail
);
10888 comp1
= (*code
)->expr1
->ts
.u
.derived
->components
;
10889 comp2
= (*code
)->expr2
->ts
.u
.derived
->components
;
10892 for (; comp1
; comp1
= comp1
->next
, comp2
= comp2
->next
)
10894 bool inout
= false;
10896 /* The intrinsic assignment does the right thing for pointers
10897 of all kinds and allocatable components. */
10898 if (!gfc_bt_struct (comp1
->ts
.type
)
10899 || comp1
->attr
.pointer
10900 || comp1
->attr
.allocatable
10901 || comp1
->attr
.proc_pointer_comp
10902 || comp1
->attr
.class_pointer
10903 || comp1
->attr
.proc_pointer
)
10906 /* Make an assigment for this component. */
10907 this_code
= build_assignment (EXEC_ASSIGN
,
10908 (*code
)->expr1
, (*code
)->expr2
,
10909 comp1
, comp2
, (*code
)->loc
);
10911 /* Convert the assignment if there is a defined assignment for
10912 this type. Otherwise, using the call from gfc_resolve_code,
10913 recurse into its components. */
10914 gfc_resolve_code (this_code
, ns
);
10916 if (this_code
->op
== EXEC_ASSIGN_CALL
)
10918 gfc_formal_arglist
*dummy_args
;
10920 /* Check that there is a typebound defined assignment. If not,
10921 then this must be a module defined assignment. We cannot
10922 use the defined_assign_comp attribute here because it must
10923 be this derived type that has the defined assignment and not
10925 if (!(comp1
->ts
.u
.derived
->f2k_derived
10926 && comp1
->ts
.u
.derived
->f2k_derived
10927 ->tb_op
[INTRINSIC_ASSIGN
]))
10929 gfc_free_statements (this_code
);
10934 /* If the first argument of the subroutine has intent INOUT
10935 a temporary must be generated and used instead. */
10936 rsym
= this_code
->resolved_sym
;
10937 dummy_args
= gfc_sym_get_dummy_args (rsym
);
10939 && dummy_args
->sym
->attr
.intent
== INTENT_INOUT
)
10941 gfc_code
*temp_code
;
10944 /* Build the temporary required for the assignment and put
10945 it at the head of the generated code. */
10948 t1
= get_temp_from_expr ((*code
)->expr1
, ns
);
10949 temp_code
= build_assignment (EXEC_ASSIGN
,
10950 t1
, (*code
)->expr1
,
10951 NULL
, NULL
, (*code
)->loc
);
10953 /* For allocatable LHS, check whether it is allocated. Note
10954 that allocatable components with defined assignment are
10955 not yet support. See PR 57696. */
10956 if ((*code
)->expr1
->symtree
->n
.sym
->attr
.allocatable
)
10960 gfc_lval_expr_from_sym ((*code
)->expr1
->symtree
->n
.sym
);
10961 block
= gfc_get_code (EXEC_IF
);
10962 block
->block
= gfc_get_code (EXEC_IF
);
10963 block
->block
->expr1
10964 = gfc_build_intrinsic_call (ns
,
10965 GFC_ISYM_ALLOCATED
, "allocated",
10966 (*code
)->loc
, 1, e
);
10967 block
->block
->next
= temp_code
;
10970 add_code_to_chain (&temp_code
, &tmp_head
, &tmp_tail
);
10973 /* Replace the first actual arg with the component of the
10975 gfc_free_expr (this_code
->ext
.actual
->expr
);
10976 this_code
->ext
.actual
->expr
= gfc_copy_expr (t1
);
10977 add_comp_ref (this_code
->ext
.actual
->expr
, comp1
);
10979 /* If the LHS variable is allocatable and wasn't allocated and
10980 the temporary is allocatable, pointer assign the address of
10981 the freshly allocated LHS to the temporary. */
10982 if ((*code
)->expr1
->symtree
->n
.sym
->attr
.allocatable
10983 && gfc_expr_attr ((*code
)->expr1
).allocatable
)
10988 cond
= gfc_get_expr ();
10989 cond
->ts
.type
= BT_LOGICAL
;
10990 cond
->ts
.kind
= gfc_default_logical_kind
;
10991 cond
->expr_type
= EXPR_OP
;
10992 cond
->where
= (*code
)->loc
;
10993 cond
->value
.op
.op
= INTRINSIC_NOT
;
10994 cond
->value
.op
.op1
= gfc_build_intrinsic_call (ns
,
10995 GFC_ISYM_ALLOCATED
, "allocated",
10996 (*code
)->loc
, 1, gfc_copy_expr (t1
));
10997 block
= gfc_get_code (EXEC_IF
);
10998 block
->block
= gfc_get_code (EXEC_IF
);
10999 block
->block
->expr1
= cond
;
11000 block
->block
->next
= build_assignment (EXEC_POINTER_ASSIGN
,
11001 t1
, (*code
)->expr1
,
11002 NULL
, NULL
, (*code
)->loc
);
11003 add_code_to_chain (&block
, &head
, &tail
);
11007 else if (this_code
->op
== EXEC_ASSIGN
&& !this_code
->next
)
11009 /* Don't add intrinsic assignments since they are already
11010 effected by the intrinsic assignment of the structure. */
11011 gfc_free_statements (this_code
);
11016 add_code_to_chain (&this_code
, &head
, &tail
);
11020 /* Transfer the value to the final result. */
11021 this_code
= build_assignment (EXEC_ASSIGN
,
11022 (*code
)->expr1
, t1
,
11023 comp1
, comp2
, (*code
)->loc
);
11024 add_code_to_chain (&this_code
, &head
, &tail
);
11028 /* Put the temporary assignments at the top of the generated code. */
11029 if (tmp_head
&& component_assignment_level
== 1)
11031 gfc_append_code (tmp_head
, head
);
11033 tmp_head
= tmp_tail
= NULL
;
11036 // If we did a pointer assignment - thus, we need to ensure that the LHS is
11037 // not accidentally deallocated. Hence, nullify t1.
11038 if (t1
&& (*code
)->expr1
->symtree
->n
.sym
->attr
.allocatable
11039 && gfc_expr_attr ((*code
)->expr1
).allocatable
)
11045 e
= gfc_lval_expr_from_sym ((*code
)->expr1
->symtree
->n
.sym
);
11046 cond
= gfc_build_intrinsic_call (ns
, GFC_ISYM_ASSOCIATED
, "associated",
11047 (*code
)->loc
, 2, gfc_copy_expr (t1
), e
);
11048 block
= gfc_get_code (EXEC_IF
);
11049 block
->block
= gfc_get_code (EXEC_IF
);
11050 block
->block
->expr1
= cond
;
11051 block
->block
->next
= build_assignment (EXEC_POINTER_ASSIGN
,
11052 t1
, gfc_get_null_expr (&(*code
)->loc
),
11053 NULL
, NULL
, (*code
)->loc
);
11054 gfc_append_code (tail
, block
);
11058 /* Now attach the remaining code chain to the input code. Step on
11059 to the end of the new code since resolution is complete. */
11060 gcc_assert ((*code
)->op
== EXEC_ASSIGN
);
11061 tail
->next
= (*code
)->next
;
11062 /* Overwrite 'code' because this would place the intrinsic assignment
11063 before the temporary for the lhs is created. */
11064 gfc_free_expr ((*code
)->expr1
);
11065 gfc_free_expr ((*code
)->expr2
);
11071 component_assignment_level
--;
11075 /* F2008: Pointer function assignments are of the form:
11076 ptr_fcn (args) = expr
11077 This function breaks these assignments into two statements:
11078 temporary_pointer => ptr_fcn(args)
11079 temporary_pointer = expr */
11082 resolve_ptr_fcn_assign (gfc_code
**code
, gfc_namespace
*ns
)
11084 gfc_expr
*tmp_ptr_expr
;
11085 gfc_code
*this_code
;
11086 gfc_component
*comp
;
11089 if ((*code
)->expr1
->expr_type
!= EXPR_FUNCTION
)
11092 /* Even if standard does not support this feature, continue to build
11093 the two statements to avoid upsetting frontend_passes.c. */
11094 gfc_notify_std (GFC_STD_F2008
, "Pointer procedure assignment at "
11095 "%L", &(*code
)->loc
);
11097 comp
= gfc_get_proc_ptr_comp ((*code
)->expr1
);
11100 s
= comp
->ts
.interface
;
11102 s
= (*code
)->expr1
->symtree
->n
.sym
;
11104 if (s
== NULL
|| !s
->result
->attr
.pointer
)
11106 gfc_error ("The function result on the lhs of the assignment at "
11107 "%L must have the pointer attribute.",
11108 &(*code
)->expr1
->where
);
11109 (*code
)->op
= EXEC_NOP
;
11113 tmp_ptr_expr
= get_temp_from_expr ((*code
)->expr2
, ns
);
11115 /* get_temp_from_expression is set up for ordinary assignments. To that
11116 end, where array bounds are not known, arrays are made allocatable.
11117 Change the temporary to a pointer here. */
11118 tmp_ptr_expr
->symtree
->n
.sym
->attr
.pointer
= 1;
11119 tmp_ptr_expr
->symtree
->n
.sym
->attr
.allocatable
= 0;
11120 tmp_ptr_expr
->where
= (*code
)->loc
;
11122 this_code
= build_assignment (EXEC_ASSIGN
,
11123 tmp_ptr_expr
, (*code
)->expr2
,
11124 NULL
, NULL
, (*code
)->loc
);
11125 this_code
->next
= (*code
)->next
;
11126 (*code
)->next
= this_code
;
11127 (*code
)->op
= EXEC_POINTER_ASSIGN
;
11128 (*code
)->expr2
= (*code
)->expr1
;
11129 (*code
)->expr1
= tmp_ptr_expr
;
11135 /* Deferred character length assignments from an operator expression
11136 require a temporary because the character length of the lhs can
11137 change in the course of the assignment. */
11140 deferred_op_assign (gfc_code
**code
, gfc_namespace
*ns
)
11142 gfc_expr
*tmp_expr
;
11143 gfc_code
*this_code
;
11145 if (!((*code
)->expr1
->ts
.type
== BT_CHARACTER
11146 && (*code
)->expr1
->ts
.deferred
&& (*code
)->expr1
->rank
11147 && (*code
)->expr2
->expr_type
== EXPR_OP
))
11150 if (!gfc_check_dependency ((*code
)->expr1
, (*code
)->expr2
, 1))
11153 tmp_expr
= get_temp_from_expr ((*code
)->expr1
, ns
);
11154 tmp_expr
->where
= (*code
)->loc
;
11156 /* A new charlen is required to ensure that the variable string
11157 length is different to that of the original lhs. */
11158 tmp_expr
->ts
.u
.cl
= gfc_get_charlen();
11159 tmp_expr
->symtree
->n
.sym
->ts
.u
.cl
= tmp_expr
->ts
.u
.cl
;
11160 tmp_expr
->ts
.u
.cl
->next
= (*code
)->expr2
->ts
.u
.cl
->next
;
11161 (*code
)->expr2
->ts
.u
.cl
->next
= tmp_expr
->ts
.u
.cl
;
11163 tmp_expr
->symtree
->n
.sym
->ts
.deferred
= 1;
11165 this_code
= build_assignment (EXEC_ASSIGN
,
11167 gfc_copy_expr (tmp_expr
),
11168 NULL
, NULL
, (*code
)->loc
);
11170 (*code
)->expr1
= tmp_expr
;
11172 this_code
->next
= (*code
)->next
;
11173 (*code
)->next
= this_code
;
11179 /* Given a block of code, recursively resolve everything pointed to by this
11183 gfc_resolve_code (gfc_code
*code
, gfc_namespace
*ns
)
11185 int omp_workshare_save
;
11186 int forall_save
, do_concurrent_save
;
11190 frame
.prev
= cs_base
;
11194 find_reachable_labels (code
);
11196 for (; code
; code
= code
->next
)
11198 frame
.current
= code
;
11199 forall_save
= forall_flag
;
11200 do_concurrent_save
= gfc_do_concurrent_flag
;
11202 if (code
->op
== EXEC_FORALL
)
11205 gfc_resolve_forall (code
, ns
, forall_save
);
11208 else if (code
->block
)
11210 omp_workshare_save
= -1;
11213 case EXEC_OACC_PARALLEL_LOOP
:
11214 case EXEC_OACC_PARALLEL
:
11215 case EXEC_OACC_KERNELS_LOOP
:
11216 case EXEC_OACC_KERNELS
:
11217 case EXEC_OACC_DATA
:
11218 case EXEC_OACC_HOST_DATA
:
11219 case EXEC_OACC_LOOP
:
11220 gfc_resolve_oacc_blocks (code
, ns
);
11222 case EXEC_OMP_PARALLEL_WORKSHARE
:
11223 omp_workshare_save
= omp_workshare_flag
;
11224 omp_workshare_flag
= 1;
11225 gfc_resolve_omp_parallel_blocks (code
, ns
);
11227 case EXEC_OMP_PARALLEL
:
11228 case EXEC_OMP_PARALLEL_DO
:
11229 case EXEC_OMP_PARALLEL_DO_SIMD
:
11230 case EXEC_OMP_PARALLEL_SECTIONS
:
11231 case EXEC_OMP_TARGET_PARALLEL
:
11232 case EXEC_OMP_TARGET_PARALLEL_DO
:
11233 case EXEC_OMP_TARGET_PARALLEL_DO_SIMD
:
11234 case EXEC_OMP_TARGET_TEAMS
:
11235 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE
:
11236 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO
:
11237 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
11238 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_SIMD
:
11239 case EXEC_OMP_TASK
:
11240 case EXEC_OMP_TASKLOOP
:
11241 case EXEC_OMP_TASKLOOP_SIMD
:
11242 case EXEC_OMP_TEAMS
:
11243 case EXEC_OMP_TEAMS_DISTRIBUTE
:
11244 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO
:
11245 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
11246 case EXEC_OMP_TEAMS_DISTRIBUTE_SIMD
:
11247 omp_workshare_save
= omp_workshare_flag
;
11248 omp_workshare_flag
= 0;
11249 gfc_resolve_omp_parallel_blocks (code
, ns
);
11251 case EXEC_OMP_DISTRIBUTE
:
11252 case EXEC_OMP_DISTRIBUTE_SIMD
:
11254 case EXEC_OMP_DO_SIMD
:
11255 case EXEC_OMP_SIMD
:
11256 case EXEC_OMP_TARGET_SIMD
:
11257 gfc_resolve_omp_do_blocks (code
, ns
);
11259 case EXEC_SELECT_TYPE
:
11260 /* Blocks are handled in resolve_select_type because we have
11261 to transform the SELECT TYPE into ASSOCIATE first. */
11263 case EXEC_DO_CONCURRENT
:
11264 gfc_do_concurrent_flag
= 1;
11265 gfc_resolve_blocks (code
->block
, ns
);
11266 gfc_do_concurrent_flag
= 2;
11268 case EXEC_OMP_WORKSHARE
:
11269 omp_workshare_save
= omp_workshare_flag
;
11270 omp_workshare_flag
= 1;
11273 gfc_resolve_blocks (code
->block
, ns
);
11277 if (omp_workshare_save
!= -1)
11278 omp_workshare_flag
= omp_workshare_save
;
11282 if (code
->op
!= EXEC_COMPCALL
&& code
->op
!= EXEC_CALL_PPC
)
11283 t
= gfc_resolve_expr (code
->expr1
);
11284 forall_flag
= forall_save
;
11285 gfc_do_concurrent_flag
= do_concurrent_save
;
11287 if (!gfc_resolve_expr (code
->expr2
))
11290 if (code
->op
== EXEC_ALLOCATE
11291 && !gfc_resolve_expr (code
->expr3
))
11297 case EXEC_END_BLOCK
:
11298 case EXEC_END_NESTED_BLOCK
:
11302 case EXEC_ERROR_STOP
:
11304 case EXEC_CONTINUE
:
11306 case EXEC_ASSIGN_CALL
:
11309 case EXEC_CRITICAL
:
11310 resolve_critical (code
);
11313 case EXEC_SYNC_ALL
:
11314 case EXEC_SYNC_IMAGES
:
11315 case EXEC_SYNC_MEMORY
:
11316 resolve_sync (code
);
11321 case EXEC_EVENT_POST
:
11322 case EXEC_EVENT_WAIT
:
11323 resolve_lock_unlock_event (code
);
11326 case EXEC_FAIL_IMAGE
:
11327 case EXEC_FORM_TEAM
:
11328 case EXEC_CHANGE_TEAM
:
11329 case EXEC_END_TEAM
:
11330 case EXEC_SYNC_TEAM
:
11334 /* Keep track of which entry we are up to. */
11335 current_entry_id
= code
->ext
.entry
->id
;
11339 resolve_where (code
, NULL
);
11343 if (code
->expr1
!= NULL
)
11345 if (code
->expr1
->ts
.type
!= BT_INTEGER
)
11346 gfc_error ("ASSIGNED GOTO statement at %L requires an "
11347 "INTEGER variable", &code
->expr1
->where
);
11348 else if (code
->expr1
->symtree
->n
.sym
->attr
.assign
!= 1)
11349 gfc_error ("Variable %qs has not been assigned a target "
11350 "label at %L", code
->expr1
->symtree
->n
.sym
->name
,
11351 &code
->expr1
->where
);
11354 resolve_branch (code
->label1
, code
);
11358 if (code
->expr1
!= NULL
11359 && (code
->expr1
->ts
.type
!= BT_INTEGER
|| code
->expr1
->rank
))
11360 gfc_error ("Alternate RETURN statement at %L requires a SCALAR-"
11361 "INTEGER return specifier", &code
->expr1
->where
);
11364 case EXEC_INIT_ASSIGN
:
11365 case EXEC_END_PROCEDURE
:
11372 /* Remove a GFC_ISYM_CAF_GET inserted for a coindexed variable on
11374 if (code
->expr1
->expr_type
== EXPR_FUNCTION
11375 && code
->expr1
->value
.function
.isym
11376 && code
->expr1
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
)
11377 remove_caf_get_intrinsic (code
->expr1
);
11379 /* If this is a pointer function in an lvalue variable context,
11380 the new code will have to be resolved afresh. This is also the
11381 case with an error, where the code is transformed into NOP to
11382 prevent ICEs downstream. */
11383 if (resolve_ptr_fcn_assign (&code
, ns
)
11384 || code
->op
== EXEC_NOP
)
11387 if (!gfc_check_vardef_context (code
->expr1
, false, false, false,
11391 if (resolve_ordinary_assign (code
, ns
))
11393 if (code
->op
== EXEC_COMPCALL
)
11399 /* Check for dependencies in deferred character length array
11400 assignments and generate a temporary, if necessary. */
11401 if (code
->op
== EXEC_ASSIGN
&& deferred_op_assign (&code
, ns
))
11404 /* F03 7.4.1.3 for non-allocatable, non-pointer components. */
11405 if (code
->op
!= EXEC_CALL
&& code
->expr1
->ts
.type
== BT_DERIVED
11406 && code
->expr1
->ts
.u
.derived
11407 && code
->expr1
->ts
.u
.derived
->attr
.defined_assign_comp
)
11408 generate_component_assignments (&code
, ns
);
11412 case EXEC_LABEL_ASSIGN
:
11413 if (code
->label1
->defined
== ST_LABEL_UNKNOWN
)
11414 gfc_error ("Label %d referenced at %L is never defined",
11415 code
->label1
->value
, &code
->label1
->where
);
11417 && (code
->expr1
->expr_type
!= EXPR_VARIABLE
11418 || code
->expr1
->symtree
->n
.sym
->ts
.type
!= BT_INTEGER
11419 || code
->expr1
->symtree
->n
.sym
->ts
.kind
11420 != gfc_default_integer_kind
11421 || code
->expr1
->symtree
->n
.sym
->as
!= NULL
))
11422 gfc_error ("ASSIGN statement at %L requires a scalar "
11423 "default INTEGER variable", &code
->expr1
->where
);
11426 case EXEC_POINTER_ASSIGN
:
11433 /* This is both a variable definition and pointer assignment
11434 context, so check both of them. For rank remapping, a final
11435 array ref may be present on the LHS and fool gfc_expr_attr
11436 used in gfc_check_vardef_context. Remove it. */
11437 e
= remove_last_array_ref (code
->expr1
);
11438 t
= gfc_check_vardef_context (e
, true, false, false,
11439 _("pointer assignment"));
11441 t
= gfc_check_vardef_context (e
, false, false, false,
11442 _("pointer assignment"));
11445 t
= gfc_check_pointer_assign (code
->expr1
, code
->expr2
, !t
) && t
;
11450 /* Assigning a class object always is a regular assign. */
11451 if (code
->expr2
->ts
.type
== BT_CLASS
11452 && code
->expr1
->ts
.type
== BT_CLASS
11453 && !CLASS_DATA (code
->expr2
)->attr
.dimension
11454 && !(gfc_expr_attr (code
->expr1
).proc_pointer
11455 && code
->expr2
->expr_type
== EXPR_VARIABLE
11456 && code
->expr2
->symtree
->n
.sym
->attr
.flavor
11458 code
->op
= EXEC_ASSIGN
;
11462 case EXEC_ARITHMETIC_IF
:
11464 gfc_expr
*e
= code
->expr1
;
11466 gfc_resolve_expr (e
);
11467 if (e
->expr_type
== EXPR_NULL
)
11468 gfc_error ("Invalid NULL at %L", &e
->where
);
11470 if (t
&& (e
->rank
> 0
11471 || !(e
->ts
.type
== BT_REAL
|| e
->ts
.type
== BT_INTEGER
)))
11472 gfc_error ("Arithmetic IF statement at %L requires a scalar "
11473 "REAL or INTEGER expression", &e
->where
);
11475 resolve_branch (code
->label1
, code
);
11476 resolve_branch (code
->label2
, code
);
11477 resolve_branch (code
->label3
, code
);
11482 if (t
&& code
->expr1
!= NULL
11483 && (code
->expr1
->ts
.type
!= BT_LOGICAL
11484 || code
->expr1
->rank
!= 0))
11485 gfc_error ("IF clause at %L requires a scalar LOGICAL expression",
11486 &code
->expr1
->where
);
11491 resolve_call (code
);
11494 case EXEC_COMPCALL
:
11496 resolve_typebound_subroutine (code
);
11499 case EXEC_CALL_PPC
:
11500 resolve_ppc_call (code
);
11504 /* Select is complicated. Also, a SELECT construct could be
11505 a transformed computed GOTO. */
11506 resolve_select (code
, false);
11509 case EXEC_SELECT_TYPE
:
11510 resolve_select_type (code
, ns
);
11514 resolve_block_construct (code
);
11518 if (code
->ext
.iterator
!= NULL
)
11520 gfc_iterator
*iter
= code
->ext
.iterator
;
11521 if (gfc_resolve_iterator (iter
, true, false))
11522 gfc_resolve_do_iterator (code
, iter
->var
->symtree
->n
.sym
,
11527 case EXEC_DO_WHILE
:
11528 if (code
->expr1
== NULL
)
11529 gfc_internal_error ("gfc_resolve_code(): No expression on "
11532 && (code
->expr1
->rank
!= 0
11533 || code
->expr1
->ts
.type
!= BT_LOGICAL
))
11534 gfc_error ("Exit condition of DO WHILE loop at %L must be "
11535 "a scalar LOGICAL expression", &code
->expr1
->where
);
11538 case EXEC_ALLOCATE
:
11540 resolve_allocate_deallocate (code
, "ALLOCATE");
11544 case EXEC_DEALLOCATE
:
11546 resolve_allocate_deallocate (code
, "DEALLOCATE");
11551 if (!gfc_resolve_open (code
->ext
.open
))
11554 resolve_branch (code
->ext
.open
->err
, code
);
11558 if (!gfc_resolve_close (code
->ext
.close
))
11561 resolve_branch (code
->ext
.close
->err
, code
);
11564 case EXEC_BACKSPACE
:
11568 if (!gfc_resolve_filepos (code
->ext
.filepos
, &code
->loc
))
11571 resolve_branch (code
->ext
.filepos
->err
, code
);
11575 if (!gfc_resolve_inquire (code
->ext
.inquire
))
11578 resolve_branch (code
->ext
.inquire
->err
, code
);
11581 case EXEC_IOLENGTH
:
11582 gcc_assert (code
->ext
.inquire
!= NULL
);
11583 if (!gfc_resolve_inquire (code
->ext
.inquire
))
11586 resolve_branch (code
->ext
.inquire
->err
, code
);
11590 if (!gfc_resolve_wait (code
->ext
.wait
))
11593 resolve_branch (code
->ext
.wait
->err
, code
);
11594 resolve_branch (code
->ext
.wait
->end
, code
);
11595 resolve_branch (code
->ext
.wait
->eor
, code
);
11600 if (!gfc_resolve_dt (code
->ext
.dt
, &code
->loc
))
11603 resolve_branch (code
->ext
.dt
->err
, code
);
11604 resolve_branch (code
->ext
.dt
->end
, code
);
11605 resolve_branch (code
->ext
.dt
->eor
, code
);
11608 case EXEC_TRANSFER
:
11609 resolve_transfer (code
);
11612 case EXEC_DO_CONCURRENT
:
11614 resolve_forall_iterators (code
->ext
.forall_iterator
);
11616 if (code
->expr1
!= NULL
11617 && (code
->expr1
->ts
.type
!= BT_LOGICAL
|| code
->expr1
->rank
))
11618 gfc_error ("FORALL mask clause at %L requires a scalar LOGICAL "
11619 "expression", &code
->expr1
->where
);
11622 case EXEC_OACC_PARALLEL_LOOP
:
11623 case EXEC_OACC_PARALLEL
:
11624 case EXEC_OACC_KERNELS_LOOP
:
11625 case EXEC_OACC_KERNELS
:
11626 case EXEC_OACC_DATA
:
11627 case EXEC_OACC_HOST_DATA
:
11628 case EXEC_OACC_LOOP
:
11629 case EXEC_OACC_UPDATE
:
11630 case EXEC_OACC_WAIT
:
11631 case EXEC_OACC_CACHE
:
11632 case EXEC_OACC_ENTER_DATA
:
11633 case EXEC_OACC_EXIT_DATA
:
11634 case EXEC_OACC_ATOMIC
:
11635 case EXEC_OACC_DECLARE
:
11636 gfc_resolve_oacc_directive (code
, ns
);
11639 case EXEC_OMP_ATOMIC
:
11640 case EXEC_OMP_BARRIER
:
11641 case EXEC_OMP_CANCEL
:
11642 case EXEC_OMP_CANCELLATION_POINT
:
11643 case EXEC_OMP_CRITICAL
:
11644 case EXEC_OMP_FLUSH
:
11645 case EXEC_OMP_DISTRIBUTE
:
11646 case EXEC_OMP_DISTRIBUTE_PARALLEL_DO
:
11647 case EXEC_OMP_DISTRIBUTE_PARALLEL_DO_SIMD
:
11648 case EXEC_OMP_DISTRIBUTE_SIMD
:
11650 case EXEC_OMP_DO_SIMD
:
11651 case EXEC_OMP_MASTER
:
11652 case EXEC_OMP_ORDERED
:
11653 case EXEC_OMP_SECTIONS
:
11654 case EXEC_OMP_SIMD
:
11655 case EXEC_OMP_SINGLE
:
11656 case EXEC_OMP_TARGET
:
11657 case EXEC_OMP_TARGET_DATA
:
11658 case EXEC_OMP_TARGET_ENTER_DATA
:
11659 case EXEC_OMP_TARGET_EXIT_DATA
:
11660 case EXEC_OMP_TARGET_PARALLEL
:
11661 case EXEC_OMP_TARGET_PARALLEL_DO
:
11662 case EXEC_OMP_TARGET_PARALLEL_DO_SIMD
:
11663 case EXEC_OMP_TARGET_SIMD
:
11664 case EXEC_OMP_TARGET_TEAMS
:
11665 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE
:
11666 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO
:
11667 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
11668 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_SIMD
:
11669 case EXEC_OMP_TARGET_UPDATE
:
11670 case EXEC_OMP_TASK
:
11671 case EXEC_OMP_TASKGROUP
:
11672 case EXEC_OMP_TASKLOOP
:
11673 case EXEC_OMP_TASKLOOP_SIMD
:
11674 case EXEC_OMP_TASKWAIT
:
11675 case EXEC_OMP_TASKYIELD
:
11676 case EXEC_OMP_TEAMS
:
11677 case EXEC_OMP_TEAMS_DISTRIBUTE
:
11678 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO
:
11679 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
11680 case EXEC_OMP_TEAMS_DISTRIBUTE_SIMD
:
11681 case EXEC_OMP_WORKSHARE
:
11682 gfc_resolve_omp_directive (code
, ns
);
11685 case EXEC_OMP_PARALLEL
:
11686 case EXEC_OMP_PARALLEL_DO
:
11687 case EXEC_OMP_PARALLEL_DO_SIMD
:
11688 case EXEC_OMP_PARALLEL_SECTIONS
:
11689 case EXEC_OMP_PARALLEL_WORKSHARE
:
11690 omp_workshare_save
= omp_workshare_flag
;
11691 omp_workshare_flag
= 0;
11692 gfc_resolve_omp_directive (code
, ns
);
11693 omp_workshare_flag
= omp_workshare_save
;
11697 gfc_internal_error ("gfc_resolve_code(): Bad statement code");
11701 cs_base
= frame
.prev
;
11705 /* Resolve initial values and make sure they are compatible with
11709 resolve_values (gfc_symbol
*sym
)
11713 if (sym
->value
== NULL
)
11716 if (sym
->value
->expr_type
== EXPR_STRUCTURE
)
11717 t
= resolve_structure_cons (sym
->value
, 1);
11719 t
= gfc_resolve_expr (sym
->value
);
11724 gfc_check_assign_symbol (sym
, NULL
, sym
->value
);
11728 /* Verify any BIND(C) derived types in the namespace so we can report errors
11729 for them once, rather than for each variable declared of that type. */
11732 resolve_bind_c_derived_types (gfc_symbol
*derived_sym
)
11734 if (derived_sym
!= NULL
&& derived_sym
->attr
.flavor
== FL_DERIVED
11735 && derived_sym
->attr
.is_bind_c
== 1)
11736 verify_bind_c_derived_type (derived_sym
);
11742 /* Check the interfaces of DTIO procedures associated with derived
11743 type 'sym'. These procedures can either have typebound bindings or
11744 can appear in DTIO generic interfaces. */
11747 gfc_verify_DTIO_procedures (gfc_symbol
*sym
)
11749 if (!sym
|| sym
->attr
.flavor
!= FL_DERIVED
)
11752 gfc_check_dtio_interfaces (sym
);
11757 /* Verify that any binding labels used in a given namespace do not collide
11758 with the names or binding labels of any global symbols. Multiple INTERFACE
11759 for the same procedure are permitted. */
11762 gfc_verify_binding_labels (gfc_symbol
*sym
)
11765 const char *module
;
11767 if (!sym
|| !sym
->attr
.is_bind_c
|| sym
->attr
.is_iso_c
11768 || sym
->attr
.flavor
== FL_DERIVED
|| !sym
->binding_label
)
11771 gsym
= gfc_find_case_gsymbol (gfc_gsym_root
, sym
->binding_label
);
11774 module
= sym
->module
;
11775 else if (sym
->ns
&& sym
->ns
->proc_name
11776 && sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
)
11777 module
= sym
->ns
->proc_name
->name
;
11778 else if (sym
->ns
&& sym
->ns
->parent
11779 && sym
->ns
&& sym
->ns
->parent
->proc_name
11780 && sym
->ns
->parent
->proc_name
->attr
.flavor
== FL_MODULE
)
11781 module
= sym
->ns
->parent
->proc_name
->name
;
11787 && (gsym
->type
== GSYM_FUNCTION
|| gsym
->type
== GSYM_SUBROUTINE
)))
11790 gsym
= gfc_get_gsymbol (sym
->binding_label
);
11791 gsym
->where
= sym
->declared_at
;
11792 gsym
->sym_name
= sym
->name
;
11793 gsym
->binding_label
= sym
->binding_label
;
11794 gsym
->ns
= sym
->ns
;
11795 gsym
->mod_name
= module
;
11796 if (sym
->attr
.function
)
11797 gsym
->type
= GSYM_FUNCTION
;
11798 else if (sym
->attr
.subroutine
)
11799 gsym
->type
= GSYM_SUBROUTINE
;
11800 /* Mark as variable/procedure as defined, unless its an INTERFACE. */
11801 gsym
->defined
= sym
->attr
.if_source
!= IFSRC_IFBODY
;
11805 if (sym
->attr
.flavor
== FL_VARIABLE
&& gsym
->type
!= GSYM_UNKNOWN
)
11807 gfc_error ("Variable %qs with binding label %qs at %L uses the same global "
11808 "identifier as entity at %L", sym
->name
,
11809 sym
->binding_label
, &sym
->declared_at
, &gsym
->where
);
11810 /* Clear the binding label to prevent checking multiple times. */
11811 sym
->binding_label
= NULL
;
11815 if (sym
->attr
.flavor
== FL_VARIABLE
&& module
11816 && (strcmp (module
, gsym
->mod_name
) != 0
11817 || strcmp (sym
->name
, gsym
->sym_name
) != 0))
11819 /* This can only happen if the variable is defined in a module - if it
11820 isn't the same module, reject it. */
11821 gfc_error ("Variable %qs from module %qs with binding label %qs at %L "
11822 "uses the same global identifier as entity at %L from module %qs",
11823 sym
->name
, module
, sym
->binding_label
,
11824 &sym
->declared_at
, &gsym
->where
, gsym
->mod_name
);
11825 sym
->binding_label
= NULL
;
11829 if ((sym
->attr
.function
|| sym
->attr
.subroutine
)
11830 && ((gsym
->type
!= GSYM_SUBROUTINE
&& gsym
->type
!= GSYM_FUNCTION
)
11831 || (gsym
->defined
&& sym
->attr
.if_source
!= IFSRC_IFBODY
))
11832 && (sym
!= gsym
->ns
->proc_name
&& sym
->attr
.entry
== 0)
11833 && (module
!= gsym
->mod_name
11834 || strcmp (gsym
->sym_name
, sym
->name
) != 0
11835 || (module
&& strcmp (module
, gsym
->mod_name
) != 0)))
11837 /* Print an error if the procedure is defined multiple times; we have to
11838 exclude references to the same procedure via module association or
11839 multiple checks for the same procedure. */
11840 gfc_error ("Procedure %qs with binding label %qs at %L uses the same "
11841 "global identifier as entity at %L", sym
->name
,
11842 sym
->binding_label
, &sym
->declared_at
, &gsym
->where
);
11843 sym
->binding_label
= NULL
;
11848 /* Resolve an index expression. */
11851 resolve_index_expr (gfc_expr
*e
)
11853 if (!gfc_resolve_expr (e
))
11856 if (!gfc_simplify_expr (e
, 0))
11859 if (!gfc_specification_expr (e
))
11866 /* Resolve a charlen structure. */
11869 resolve_charlen (gfc_charlen
*cl
)
11872 bool saved_specification_expr
;
11878 saved_specification_expr
= specification_expr
;
11879 specification_expr
= true;
11881 if (cl
->length_from_typespec
)
11883 if (!gfc_resolve_expr (cl
->length
))
11885 specification_expr
= saved_specification_expr
;
11889 if (!gfc_simplify_expr (cl
->length
, 0))
11891 specification_expr
= saved_specification_expr
;
11895 /* cl->length has been resolved. It should have an integer type. */
11896 if (cl
->length
->ts
.type
!= BT_INTEGER
)
11898 gfc_error ("Scalar INTEGER expression expected at %L",
11899 &cl
->length
->where
);
11905 if (!resolve_index_expr (cl
->length
))
11907 specification_expr
= saved_specification_expr
;
11912 /* F2008, 4.4.3.2: If the character length parameter value evaluates to
11913 a negative value, the length of character entities declared is zero. */
11914 if (cl
->length
&& cl
->length
->expr_type
== EXPR_CONSTANT
11915 && mpz_sgn (cl
->length
->value
.integer
) < 0)
11916 gfc_replace_expr (cl
->length
,
11917 gfc_get_int_expr (gfc_charlen_int_kind
, NULL
, 0));
11919 /* Check that the character length is not too large. */
11920 k
= gfc_validate_kind (BT_INTEGER
, gfc_charlen_int_kind
, false);
11921 if (cl
->length
&& cl
->length
->expr_type
== EXPR_CONSTANT
11922 && cl
->length
->ts
.type
== BT_INTEGER
11923 && mpz_cmp (cl
->length
->value
.integer
, gfc_integer_kinds
[k
].huge
) > 0)
11925 gfc_error ("String length at %L is too large", &cl
->length
->where
);
11926 specification_expr
= saved_specification_expr
;
11930 specification_expr
= saved_specification_expr
;
11935 /* Test for non-constant shape arrays. */
11938 is_non_constant_shape_array (gfc_symbol
*sym
)
11944 not_constant
= false;
11945 if (sym
->as
!= NULL
)
11947 /* Unfortunately, !gfc_is_compile_time_shape hits a legal case that
11948 has not been simplified; parameter array references. Do the
11949 simplification now. */
11950 for (i
= 0; i
< sym
->as
->rank
+ sym
->as
->corank
; i
++)
11952 e
= sym
->as
->lower
[i
];
11953 if (e
&& (!resolve_index_expr(e
)
11954 || !gfc_is_constant_expr (e
)))
11955 not_constant
= true;
11956 e
= sym
->as
->upper
[i
];
11957 if (e
&& (!resolve_index_expr(e
)
11958 || !gfc_is_constant_expr (e
)))
11959 not_constant
= true;
11962 return not_constant
;
11965 /* Given a symbol and an initialization expression, add code to initialize
11966 the symbol to the function entry. */
11968 build_init_assign (gfc_symbol
*sym
, gfc_expr
*init
)
11972 gfc_namespace
*ns
= sym
->ns
;
11974 /* Search for the function namespace if this is a contained
11975 function without an explicit result. */
11976 if (sym
->attr
.function
&& sym
== sym
->result
11977 && sym
->name
!= sym
->ns
->proc_name
->name
)
11979 ns
= ns
->contained
;
11980 for (;ns
; ns
= ns
->sibling
)
11981 if (strcmp (ns
->proc_name
->name
, sym
->name
) == 0)
11987 gfc_free_expr (init
);
11991 /* Build an l-value expression for the result. */
11992 lval
= gfc_lval_expr_from_sym (sym
);
11994 /* Add the code at scope entry. */
11995 init_st
= gfc_get_code (EXEC_INIT_ASSIGN
);
11996 init_st
->next
= ns
->code
;
11997 ns
->code
= init_st
;
11999 /* Assign the default initializer to the l-value. */
12000 init_st
->loc
= sym
->declared_at
;
12001 init_st
->expr1
= lval
;
12002 init_st
->expr2
= init
;
12006 /* Whether or not we can generate a default initializer for a symbol. */
12009 can_generate_init (gfc_symbol
*sym
)
12011 symbol_attribute
*a
;
12016 /* These symbols should never have a default initialization. */
12021 || (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
)
12022 && (CLASS_DATA (sym
)->attr
.class_pointer
12023 || CLASS_DATA (sym
)->attr
.proc_pointer
))
12024 || a
->in_equivalence
12031 || (!a
->referenced
&& !a
->result
)
12032 || (a
->dummy
&& a
->intent
!= INTENT_OUT
)
12033 || (a
->function
&& sym
!= sym
->result
)
12038 /* Assign the default initializer to a derived type variable or result. */
12041 apply_default_init (gfc_symbol
*sym
)
12043 gfc_expr
*init
= NULL
;
12045 if (sym
->attr
.flavor
!= FL_VARIABLE
&& !sym
->attr
.function
)
12048 if (sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
)
12049 init
= gfc_generate_initializer (&sym
->ts
, can_generate_init (sym
));
12051 if (init
== NULL
&& sym
->ts
.type
!= BT_CLASS
)
12054 build_init_assign (sym
, init
);
12055 sym
->attr
.referenced
= 1;
12059 /* Build an initializer for a local. Returns null if the symbol should not have
12060 a default initialization. */
12063 build_default_init_expr (gfc_symbol
*sym
)
12065 /* These symbols should never have a default initialization. */
12066 if (sym
->attr
.allocatable
12067 || sym
->attr
.external
12069 || sym
->attr
.pointer
12070 || sym
->attr
.in_equivalence
12071 || sym
->attr
.in_common
12074 || sym
->attr
.cray_pointee
12075 || sym
->attr
.cray_pointer
12079 /* Get the appropriate init expression. */
12080 return gfc_build_default_init_expr (&sym
->ts
, &sym
->declared_at
);
12083 /* Add an initialization expression to a local variable. */
12085 apply_default_init_local (gfc_symbol
*sym
)
12087 gfc_expr
*init
= NULL
;
12089 /* The symbol should be a variable or a function return value. */
12090 if ((sym
->attr
.flavor
!= FL_VARIABLE
&& !sym
->attr
.function
)
12091 || (sym
->attr
.function
&& sym
->result
!= sym
))
12094 /* Try to build the initializer expression. If we can't initialize
12095 this symbol, then init will be NULL. */
12096 init
= build_default_init_expr (sym
);
12100 /* For saved variables, we don't want to add an initializer at function
12101 entry, so we just add a static initializer. Note that automatic variables
12102 are stack allocated even with -fno-automatic; we have also to exclude
12103 result variable, which are also nonstatic. */
12104 if (!sym
->attr
.automatic
12105 && (sym
->attr
.save
|| sym
->ns
->save_all
12106 || (flag_max_stack_var_size
== 0 && !sym
->attr
.result
12107 && (sym
->ns
->proc_name
&& !sym
->ns
->proc_name
->attr
.recursive
)
12108 && (!sym
->attr
.dimension
|| !is_non_constant_shape_array (sym
)))))
12110 /* Don't clobber an existing initializer! */
12111 gcc_assert (sym
->value
== NULL
);
12116 build_init_assign (sym
, init
);
12120 /* Resolution of common features of flavors variable and procedure. */
12123 resolve_fl_var_and_proc (gfc_symbol
*sym
, int mp_flag
)
12125 gfc_array_spec
*as
;
12127 if (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
)
12128 as
= CLASS_DATA (sym
)->as
;
12132 /* Constraints on deferred shape variable. */
12133 if (as
== NULL
|| as
->type
!= AS_DEFERRED
)
12135 bool pointer
, allocatable
, dimension
;
12137 if (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
)
12139 pointer
= CLASS_DATA (sym
)->attr
.class_pointer
;
12140 allocatable
= CLASS_DATA (sym
)->attr
.allocatable
;
12141 dimension
= CLASS_DATA (sym
)->attr
.dimension
;
12145 pointer
= sym
->attr
.pointer
&& !sym
->attr
.select_type_temporary
;
12146 allocatable
= sym
->attr
.allocatable
;
12147 dimension
= sym
->attr
.dimension
;
12152 if (dimension
&& as
->type
!= AS_ASSUMED_RANK
)
12154 gfc_error ("Allocatable array %qs at %L must have a deferred "
12155 "shape or assumed rank", sym
->name
, &sym
->declared_at
);
12158 else if (!gfc_notify_std (GFC_STD_F2003
, "Scalar object "
12159 "%qs at %L may not be ALLOCATABLE",
12160 sym
->name
, &sym
->declared_at
))
12164 if (pointer
&& dimension
&& as
->type
!= AS_ASSUMED_RANK
)
12166 gfc_error ("Array pointer %qs at %L must have a deferred shape or "
12167 "assumed rank", sym
->name
, &sym
->declared_at
);
12173 if (!mp_flag
&& !sym
->attr
.allocatable
&& !sym
->attr
.pointer
12174 && sym
->ts
.type
!= BT_CLASS
&& !sym
->assoc
)
12176 gfc_error ("Array %qs at %L cannot have a deferred shape",
12177 sym
->name
, &sym
->declared_at
);
12182 /* Constraints on polymorphic variables. */
12183 if (sym
->ts
.type
== BT_CLASS
&& !(sym
->result
&& sym
->result
!= sym
))
12186 if (sym
->attr
.class_ok
12187 && !sym
->attr
.select_type_temporary
12188 && !UNLIMITED_POLY (sym
)
12189 && !gfc_type_is_extensible (CLASS_DATA (sym
)->ts
.u
.derived
))
12191 gfc_error ("Type %qs of CLASS variable %qs at %L is not extensible",
12192 CLASS_DATA (sym
)->ts
.u
.derived
->name
, sym
->name
,
12193 &sym
->declared_at
);
12198 /* Assume that use associated symbols were checked in the module ns.
12199 Class-variables that are associate-names are also something special
12200 and excepted from the test. */
12201 if (!sym
->attr
.class_ok
&& !sym
->attr
.use_assoc
&& !sym
->assoc
)
12203 gfc_error ("CLASS variable %qs at %L must be dummy, allocatable "
12204 "or pointer", sym
->name
, &sym
->declared_at
);
12213 /* Additional checks for symbols with flavor variable and derived
12214 type. To be called from resolve_fl_variable. */
12217 resolve_fl_variable_derived (gfc_symbol
*sym
, int no_init_flag
)
12219 gcc_assert (sym
->ts
.type
== BT_DERIVED
|| sym
->ts
.type
== BT_CLASS
);
12221 /* Check to see if a derived type is blocked from being host
12222 associated by the presence of another class I symbol in the same
12223 namespace. 14.6.1.3 of the standard and the discussion on
12224 comp.lang.fortran. */
12225 if (sym
->ns
!= sym
->ts
.u
.derived
->ns
12226 && !sym
->ts
.u
.derived
->attr
.use_assoc
12227 && sym
->ns
->proc_name
->attr
.if_source
!= IFSRC_IFBODY
)
12230 gfc_find_symbol (sym
->ts
.u
.derived
->name
, sym
->ns
, 0, &s
);
12231 if (s
&& s
->attr
.generic
)
12232 s
= gfc_find_dt_in_generic (s
);
12233 if (s
&& !gfc_fl_struct (s
->attr
.flavor
))
12235 gfc_error ("The type %qs cannot be host associated at %L "
12236 "because it is blocked by an incompatible object "
12237 "of the same name declared at %L",
12238 sym
->ts
.u
.derived
->name
, &sym
->declared_at
,
12244 /* 4th constraint in section 11.3: "If an object of a type for which
12245 component-initialization is specified (R429) appears in the
12246 specification-part of a module and does not have the ALLOCATABLE
12247 or POINTER attribute, the object shall have the SAVE attribute."
12249 The check for initializers is performed with
12250 gfc_has_default_initializer because gfc_default_initializer generates
12251 a hidden default for allocatable components. */
12252 if (!(sym
->value
|| no_init_flag
) && sym
->ns
->proc_name
12253 && sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
12254 && !(sym
->ns
->save_all
&& !sym
->attr
.automatic
) && !sym
->attr
.save
12255 && !sym
->attr
.pointer
&& !sym
->attr
.allocatable
12256 && gfc_has_default_initializer (sym
->ts
.u
.derived
)
12257 && !gfc_notify_std (GFC_STD_F2008
, "Implied SAVE for module variable "
12258 "%qs at %L, needed due to the default "
12259 "initialization", sym
->name
, &sym
->declared_at
))
12262 /* Assign default initializer. */
12263 if (!(sym
->value
|| sym
->attr
.pointer
|| sym
->attr
.allocatable
)
12264 && (!no_init_flag
|| sym
->attr
.intent
== INTENT_OUT
))
12265 sym
->value
= gfc_generate_initializer (&sym
->ts
, can_generate_init (sym
));
12271 /* F2008, C402 (R401): A colon shall not be used as a type-param-value
12272 except in the declaration of an entity or component that has the POINTER
12273 or ALLOCATABLE attribute. */
12276 deferred_requirements (gfc_symbol
*sym
)
12278 if (sym
->ts
.deferred
12279 && !(sym
->attr
.pointer
12280 || sym
->attr
.allocatable
12281 || sym
->attr
.associate_var
12282 || sym
->attr
.omp_udr_artificial_var
))
12284 gfc_error ("Entity %qs at %L has a deferred type parameter and "
12285 "requires either the POINTER or ALLOCATABLE attribute",
12286 sym
->name
, &sym
->declared_at
);
12293 /* Resolve symbols with flavor variable. */
12296 resolve_fl_variable (gfc_symbol
*sym
, int mp_flag
)
12298 const char *auto_save_msg
= "Automatic object %qs at %L cannot have the "
12301 if (!resolve_fl_var_and_proc (sym
, mp_flag
))
12304 /* Set this flag to check that variables are parameters of all entries.
12305 This check is effected by the call to gfc_resolve_expr through
12306 is_non_constant_shape_array. */
12307 bool saved_specification_expr
= specification_expr
;
12308 specification_expr
= true;
12310 if (sym
->ns
->proc_name
12311 && (sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
12312 || sym
->ns
->proc_name
->attr
.is_main_program
)
12313 && !sym
->attr
.use_assoc
12314 && !sym
->attr
.allocatable
12315 && !sym
->attr
.pointer
12316 && is_non_constant_shape_array (sym
))
12318 /* F08:C541. The shape of an array defined in a main program or module
12319 * needs to be constant. */
12320 gfc_error ("The module or main program array %qs at %L must "
12321 "have constant shape", sym
->name
, &sym
->declared_at
);
12322 specification_expr
= saved_specification_expr
;
12326 /* Constraints on deferred type parameter. */
12327 if (!deferred_requirements (sym
))
12330 if (sym
->ts
.type
== BT_CHARACTER
&& !sym
->attr
.associate_var
)
12332 /* Make sure that character string variables with assumed length are
12333 dummy arguments. */
12334 gfc_expr
*e
= NULL
;
12337 e
= sym
->ts
.u
.cl
->length
;
12341 if (e
== NULL
&& !sym
->attr
.dummy
&& !sym
->attr
.result
12342 && !sym
->ts
.deferred
&& !sym
->attr
.select_type_temporary
12343 && !sym
->attr
.omp_udr_artificial_var
)
12345 gfc_error ("Entity with assumed character length at %L must be a "
12346 "dummy argument or a PARAMETER", &sym
->declared_at
);
12347 specification_expr
= saved_specification_expr
;
12351 if (e
&& sym
->attr
.save
== SAVE_EXPLICIT
&& !gfc_is_constant_expr (e
))
12353 gfc_error (auto_save_msg
, sym
->name
, &sym
->declared_at
);
12354 specification_expr
= saved_specification_expr
;
12358 if (!gfc_is_constant_expr (e
)
12359 && !(e
->expr_type
== EXPR_VARIABLE
12360 && e
->symtree
->n
.sym
->attr
.flavor
== FL_PARAMETER
))
12362 if (!sym
->attr
.use_assoc
&& sym
->ns
->proc_name
12363 && (sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
12364 || sym
->ns
->proc_name
->attr
.is_main_program
))
12366 gfc_error ("%qs at %L must have constant character length "
12367 "in this context", sym
->name
, &sym
->declared_at
);
12368 specification_expr
= saved_specification_expr
;
12371 if (sym
->attr
.in_common
)
12373 gfc_error ("COMMON variable %qs at %L must have constant "
12374 "character length", sym
->name
, &sym
->declared_at
);
12375 specification_expr
= saved_specification_expr
;
12381 if (sym
->value
== NULL
&& sym
->attr
.referenced
)
12382 apply_default_init_local (sym
); /* Try to apply a default initialization. */
12384 /* Determine if the symbol may not have an initializer. */
12385 int no_init_flag
= 0, automatic_flag
= 0;
12386 if (sym
->attr
.allocatable
|| sym
->attr
.external
|| sym
->attr
.dummy
12387 || sym
->attr
.intrinsic
|| sym
->attr
.result
)
12389 else if ((sym
->attr
.dimension
|| sym
->attr
.codimension
) && !sym
->attr
.pointer
12390 && is_non_constant_shape_array (sym
))
12392 no_init_flag
= automatic_flag
= 1;
12394 /* Also, they must not have the SAVE attribute.
12395 SAVE_IMPLICIT is checked below. */
12396 if (sym
->as
&& sym
->attr
.codimension
)
12398 int corank
= sym
->as
->corank
;
12399 sym
->as
->corank
= 0;
12400 no_init_flag
= automatic_flag
= is_non_constant_shape_array (sym
);
12401 sym
->as
->corank
= corank
;
12403 if (automatic_flag
&& sym
->attr
.save
== SAVE_EXPLICIT
)
12405 gfc_error (auto_save_msg
, sym
->name
, &sym
->declared_at
);
12406 specification_expr
= saved_specification_expr
;
12411 /* Ensure that any initializer is simplified. */
12413 gfc_simplify_expr (sym
->value
, 1);
12415 /* Reject illegal initializers. */
12416 if (!sym
->mark
&& sym
->value
)
12418 if (sym
->attr
.allocatable
|| (sym
->ts
.type
== BT_CLASS
12419 && CLASS_DATA (sym
)->attr
.allocatable
))
12420 gfc_error ("Allocatable %qs at %L cannot have an initializer",
12421 sym
->name
, &sym
->declared_at
);
12422 else if (sym
->attr
.external
)
12423 gfc_error ("External %qs at %L cannot have an initializer",
12424 sym
->name
, &sym
->declared_at
);
12425 else if (sym
->attr
.dummy
12426 && !(sym
->ts
.type
== BT_DERIVED
&& sym
->attr
.intent
== INTENT_OUT
))
12427 gfc_error ("Dummy %qs at %L cannot have an initializer",
12428 sym
->name
, &sym
->declared_at
);
12429 else if (sym
->attr
.intrinsic
)
12430 gfc_error ("Intrinsic %qs at %L cannot have an initializer",
12431 sym
->name
, &sym
->declared_at
);
12432 else if (sym
->attr
.result
)
12433 gfc_error ("Function result %qs at %L cannot have an initializer",
12434 sym
->name
, &sym
->declared_at
);
12435 else if (automatic_flag
)
12436 gfc_error ("Automatic array %qs at %L cannot have an initializer",
12437 sym
->name
, &sym
->declared_at
);
12439 goto no_init_error
;
12440 specification_expr
= saved_specification_expr
;
12445 if (sym
->ts
.type
== BT_DERIVED
|| sym
->ts
.type
== BT_CLASS
)
12447 bool res
= resolve_fl_variable_derived (sym
, no_init_flag
);
12448 specification_expr
= saved_specification_expr
;
12452 specification_expr
= saved_specification_expr
;
12457 /* Compare the dummy characteristics of a module procedure interface
12458 declaration with the corresponding declaration in a submodule. */
12459 static gfc_formal_arglist
*new_formal
;
12460 static char errmsg
[200];
12463 compare_fsyms (gfc_symbol
*sym
)
12467 if (sym
== NULL
|| new_formal
== NULL
)
12470 fsym
= new_formal
->sym
;
12475 if (strcmp (sym
->name
, fsym
->name
) == 0)
12477 if (!gfc_check_dummy_characteristics (fsym
, sym
, true, errmsg
, 200))
12478 gfc_error ("%s at %L", errmsg
, &fsym
->declared_at
);
12483 /* Resolve a procedure. */
12486 resolve_fl_procedure (gfc_symbol
*sym
, int mp_flag
)
12488 gfc_formal_arglist
*arg
;
12490 if (sym
->attr
.function
12491 && !resolve_fl_var_and_proc (sym
, mp_flag
))
12494 if (sym
->ts
.type
== BT_CHARACTER
)
12496 gfc_charlen
*cl
= sym
->ts
.u
.cl
;
12498 if (cl
&& cl
->length
&& gfc_is_constant_expr (cl
->length
)
12499 && !resolve_charlen (cl
))
12502 if ((!cl
|| !cl
->length
|| cl
->length
->expr_type
!= EXPR_CONSTANT
)
12503 && sym
->attr
.proc
== PROC_ST_FUNCTION
)
12505 gfc_error ("Character-valued statement function %qs at %L must "
12506 "have constant length", sym
->name
, &sym
->declared_at
);
12511 /* Ensure that derived type for are not of a private type. Internal
12512 module procedures are excluded by 2.2.3.3 - i.e., they are not
12513 externally accessible and can access all the objects accessible in
12515 if (!(sym
->ns
->parent
&& sym
->ns
->parent
->proc_name
12516 && sym
->ns
->parent
->proc_name
->attr
.flavor
== FL_MODULE
)
12517 && gfc_check_symbol_access (sym
))
12519 gfc_interface
*iface
;
12521 for (arg
= gfc_sym_get_dummy_args (sym
); arg
; arg
= arg
->next
)
12524 && arg
->sym
->ts
.type
== BT_DERIVED
12525 && !arg
->sym
->ts
.u
.derived
->attr
.use_assoc
12526 && !gfc_check_symbol_access (arg
->sym
->ts
.u
.derived
)
12527 && !gfc_notify_std (GFC_STD_F2003
, "%qs is of a PRIVATE type "
12528 "and cannot be a dummy argument"
12529 " of %qs, which is PUBLIC at %L",
12530 arg
->sym
->name
, sym
->name
,
12531 &sym
->declared_at
))
12533 /* Stop this message from recurring. */
12534 arg
->sym
->ts
.u
.derived
->attr
.access
= ACCESS_PUBLIC
;
12539 /* PUBLIC interfaces may expose PRIVATE procedures that take types
12540 PRIVATE to the containing module. */
12541 for (iface
= sym
->generic
; iface
; iface
= iface
->next
)
12543 for (arg
= gfc_sym_get_dummy_args (iface
->sym
); arg
; arg
= arg
->next
)
12546 && arg
->sym
->ts
.type
== BT_DERIVED
12547 && !arg
->sym
->ts
.u
.derived
->attr
.use_assoc
12548 && !gfc_check_symbol_access (arg
->sym
->ts
.u
.derived
)
12549 && !gfc_notify_std (GFC_STD_F2003
, "Procedure %qs in "
12550 "PUBLIC interface %qs at %L "
12551 "takes dummy arguments of %qs which "
12552 "is PRIVATE", iface
->sym
->name
,
12553 sym
->name
, &iface
->sym
->declared_at
,
12554 gfc_typename(&arg
->sym
->ts
)))
12556 /* Stop this message from recurring. */
12557 arg
->sym
->ts
.u
.derived
->attr
.access
= ACCESS_PUBLIC
;
12564 if (sym
->attr
.function
&& sym
->value
&& sym
->attr
.proc
!= PROC_ST_FUNCTION
12565 && !sym
->attr
.proc_pointer
)
12567 gfc_error ("Function %qs at %L cannot have an initializer",
12568 sym
->name
, &sym
->declared_at
);
12570 /* Make sure no second error is issued for this. */
12571 sym
->value
->error
= 1;
12575 /* An external symbol may not have an initializer because it is taken to be
12576 a procedure. Exception: Procedure Pointers. */
12577 if (sym
->attr
.external
&& sym
->value
&& !sym
->attr
.proc_pointer
)
12579 gfc_error ("External object %qs at %L may not have an initializer",
12580 sym
->name
, &sym
->declared_at
);
12584 /* An elemental function is required to return a scalar 12.7.1 */
12585 if (sym
->attr
.elemental
&& sym
->attr
.function
12586 && (sym
->as
|| (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
)->as
)))
12588 gfc_error ("ELEMENTAL function %qs at %L must have a scalar "
12589 "result", sym
->name
, &sym
->declared_at
);
12590 /* Reset so that the error only occurs once. */
12591 sym
->attr
.elemental
= 0;
12595 if (sym
->attr
.proc
== PROC_ST_FUNCTION
12596 && (sym
->attr
.allocatable
|| sym
->attr
.pointer
))
12598 gfc_error ("Statement function %qs at %L may not have pointer or "
12599 "allocatable attribute", sym
->name
, &sym
->declared_at
);
12603 /* 5.1.1.5 of the Standard: A function name declared with an asterisk
12604 char-len-param shall not be array-valued, pointer-valued, recursive
12605 or pure. ....snip... A character value of * may only be used in the
12606 following ways: (i) Dummy arg of procedure - dummy associates with
12607 actual length; (ii) To declare a named constant; or (iii) External
12608 function - but length must be declared in calling scoping unit. */
12609 if (sym
->attr
.function
12610 && sym
->ts
.type
== BT_CHARACTER
&& !sym
->ts
.deferred
12611 && sym
->ts
.u
.cl
&& sym
->ts
.u
.cl
->length
== NULL
)
12613 if ((sym
->as
&& sym
->as
->rank
) || (sym
->attr
.pointer
)
12614 || (sym
->attr
.recursive
) || (sym
->attr
.pure
))
12616 if (sym
->as
&& sym
->as
->rank
)
12617 gfc_error ("CHARACTER(*) function %qs at %L cannot be "
12618 "array-valued", sym
->name
, &sym
->declared_at
);
12620 if (sym
->attr
.pointer
)
12621 gfc_error ("CHARACTER(*) function %qs at %L cannot be "
12622 "pointer-valued", sym
->name
, &sym
->declared_at
);
12624 if (sym
->attr
.pure
)
12625 gfc_error ("CHARACTER(*) function %qs at %L cannot be "
12626 "pure", sym
->name
, &sym
->declared_at
);
12628 if (sym
->attr
.recursive
)
12629 gfc_error ("CHARACTER(*) function %qs at %L cannot be "
12630 "recursive", sym
->name
, &sym
->declared_at
);
12635 /* Appendix B.2 of the standard. Contained functions give an
12636 error anyway. Deferred character length is an F2003 feature.
12637 Don't warn on intrinsic conversion functions, which start
12638 with two underscores. */
12639 if (!sym
->attr
.contained
&& !sym
->ts
.deferred
12640 && (sym
->name
[0] != '_' || sym
->name
[1] != '_'))
12641 gfc_notify_std (GFC_STD_F95_OBS
,
12642 "CHARACTER(*) function %qs at %L",
12643 sym
->name
, &sym
->declared_at
);
12646 /* F2008, C1218. */
12647 if (sym
->attr
.elemental
)
12649 if (sym
->attr
.proc_pointer
)
12651 gfc_error ("Procedure pointer %qs at %L shall not be elemental",
12652 sym
->name
, &sym
->declared_at
);
12655 if (sym
->attr
.dummy
)
12657 gfc_error ("Dummy procedure %qs at %L shall not be elemental",
12658 sym
->name
, &sym
->declared_at
);
12663 /* F2018, C15100: "The result of an elemental function shall be scalar,
12664 and shall not have the POINTER or ALLOCATABLE attribute." The scalar
12665 pointer is tested and caught elsewhere. */
12666 if (sym
->attr
.elemental
&& sym
->result
12667 && (sym
->result
->attr
.allocatable
|| sym
->result
->attr
.pointer
))
12669 gfc_error ("Function result variable %qs at %L of elemental "
12670 "function %qs shall not have an ALLOCATABLE or POINTER "
12671 "attribute", sym
->result
->name
,
12672 &sym
->result
->declared_at
, sym
->name
);
12676 if (sym
->attr
.is_bind_c
&& sym
->attr
.is_c_interop
!= 1)
12678 gfc_formal_arglist
*curr_arg
;
12679 int has_non_interop_arg
= 0;
12681 if (!verify_bind_c_sym (sym
, &(sym
->ts
), sym
->attr
.in_common
,
12682 sym
->common_block
))
12684 /* Clear these to prevent looking at them again if there was an
12686 sym
->attr
.is_bind_c
= 0;
12687 sym
->attr
.is_c_interop
= 0;
12688 sym
->ts
.is_c_interop
= 0;
12692 /* So far, no errors have been found. */
12693 sym
->attr
.is_c_interop
= 1;
12694 sym
->ts
.is_c_interop
= 1;
12697 curr_arg
= gfc_sym_get_dummy_args (sym
);
12698 while (curr_arg
!= NULL
)
12700 /* Skip implicitly typed dummy args here. */
12701 if (curr_arg
->sym
&& curr_arg
->sym
->attr
.implicit_type
== 0)
12702 if (!gfc_verify_c_interop_param (curr_arg
->sym
))
12703 /* If something is found to fail, record the fact so we
12704 can mark the symbol for the procedure as not being
12705 BIND(C) to try and prevent multiple errors being
12707 has_non_interop_arg
= 1;
12709 curr_arg
= curr_arg
->next
;
12712 /* See if any of the arguments were not interoperable and if so, clear
12713 the procedure symbol to prevent duplicate error messages. */
12714 if (has_non_interop_arg
!= 0)
12716 sym
->attr
.is_c_interop
= 0;
12717 sym
->ts
.is_c_interop
= 0;
12718 sym
->attr
.is_bind_c
= 0;
12722 if (!sym
->attr
.proc_pointer
)
12724 if (sym
->attr
.save
== SAVE_EXPLICIT
)
12726 gfc_error ("PROCEDURE attribute conflicts with SAVE attribute "
12727 "in %qs at %L", sym
->name
, &sym
->declared_at
);
12730 if (sym
->attr
.intent
)
12732 gfc_error ("PROCEDURE attribute conflicts with INTENT attribute "
12733 "in %qs at %L", sym
->name
, &sym
->declared_at
);
12736 if (sym
->attr
.subroutine
&& sym
->attr
.result
)
12738 gfc_error ("PROCEDURE attribute conflicts with RESULT attribute "
12739 "in %qs at %L", sym
->name
, &sym
->declared_at
);
12742 if (sym
->attr
.external
&& sym
->attr
.function
&& !sym
->attr
.module_procedure
12743 && ((sym
->attr
.if_source
== IFSRC_DECL
&& !sym
->attr
.procedure
)
12744 || sym
->attr
.contained
))
12746 gfc_error ("EXTERNAL attribute conflicts with FUNCTION attribute "
12747 "in %qs at %L", sym
->name
, &sym
->declared_at
);
12750 if (strcmp ("ppr@", sym
->name
) == 0)
12752 gfc_error ("Procedure pointer result %qs at %L "
12753 "is missing the pointer attribute",
12754 sym
->ns
->proc_name
->name
, &sym
->declared_at
);
12759 /* Assume that a procedure whose body is not known has references
12760 to external arrays. */
12761 if (sym
->attr
.if_source
!= IFSRC_DECL
)
12762 sym
->attr
.array_outer_dependency
= 1;
12764 /* Compare the characteristics of a module procedure with the
12765 interface declaration. Ideally this would be done with
12766 gfc_compare_interfaces but, at present, the formal interface
12767 cannot be copied to the ts.interface. */
12768 if (sym
->attr
.module_procedure
12769 && sym
->attr
.if_source
== IFSRC_DECL
)
12772 char name
[2*GFC_MAX_SYMBOL_LEN
+ 1];
12774 char *submodule_name
;
12775 strcpy (name
, sym
->ns
->proc_name
->name
);
12776 module_name
= strtok (name
, ".");
12777 submodule_name
= strtok (NULL
, ".");
12779 iface
= sym
->tlink
;
12782 /* Make sure that the result uses the correct charlen for deferred
12784 if (iface
&& sym
->result
12785 && iface
->ts
.type
== BT_CHARACTER
12786 && iface
->ts
.deferred
)
12787 sym
->result
->ts
.u
.cl
= iface
->ts
.u
.cl
;
12792 /* Check the procedure characteristics. */
12793 if (sym
->attr
.elemental
!= iface
->attr
.elemental
)
12795 gfc_error ("Mismatch in ELEMENTAL attribute between MODULE "
12796 "PROCEDURE at %L and its interface in %s",
12797 &sym
->declared_at
, module_name
);
12801 if (sym
->attr
.pure
!= iface
->attr
.pure
)
12803 gfc_error ("Mismatch in PURE attribute between MODULE "
12804 "PROCEDURE at %L and its interface in %s",
12805 &sym
->declared_at
, module_name
);
12809 if (sym
->attr
.recursive
!= iface
->attr
.recursive
)
12811 gfc_error ("Mismatch in RECURSIVE attribute between MODULE "
12812 "PROCEDURE at %L and its interface in %s",
12813 &sym
->declared_at
, module_name
);
12817 /* Check the result characteristics. */
12818 if (!gfc_check_result_characteristics (sym
, iface
, errmsg
, 200))
12820 gfc_error ("%s between the MODULE PROCEDURE declaration "
12821 "in MODULE %qs and the declaration at %L in "
12823 errmsg
, module_name
, &sym
->declared_at
,
12824 submodule_name
? submodule_name
: module_name
);
12829 /* Check the characteristics of the formal arguments. */
12830 if (sym
->formal
&& sym
->formal_ns
)
12832 for (arg
= sym
->formal
; arg
&& arg
->sym
; arg
= arg
->next
)
12835 gfc_traverse_ns (sym
->formal_ns
, compare_fsyms
);
12843 /* Resolve a list of finalizer procedures. That is, after they have hopefully
12844 been defined and we now know their defined arguments, check that they fulfill
12845 the requirements of the standard for procedures used as finalizers. */
12848 gfc_resolve_finalizers (gfc_symbol
* derived
, bool *finalizable
)
12850 gfc_finalizer
* list
;
12851 gfc_finalizer
** prev_link
; /* For removing wrong entries from the list. */
12852 bool result
= true;
12853 bool seen_scalar
= false;
12856 gfc_symbol
*parent
= gfc_get_derived_super_type (derived
);
12859 gfc_resolve_finalizers (parent
, finalizable
);
12861 /* Ensure that derived-type components have a their finalizers resolved. */
12862 bool has_final
= derived
->f2k_derived
&& derived
->f2k_derived
->finalizers
;
12863 for (c
= derived
->components
; c
; c
= c
->next
)
12864 if (c
->ts
.type
== BT_DERIVED
12865 && !c
->attr
.pointer
&& !c
->attr
.proc_pointer
&& !c
->attr
.allocatable
)
12867 bool has_final2
= false;
12868 if (!gfc_resolve_finalizers (c
->ts
.u
.derived
, &has_final2
))
12869 return false; /* Error. */
12870 has_final
= has_final
|| has_final2
;
12872 /* Return early if not finalizable. */
12876 *finalizable
= false;
12880 /* Walk over the list of finalizer-procedures, check them, and if any one
12881 does not fit in with the standard's definition, print an error and remove
12882 it from the list. */
12883 prev_link
= &derived
->f2k_derived
->finalizers
;
12884 for (list
= derived
->f2k_derived
->finalizers
; list
; list
= *prev_link
)
12886 gfc_formal_arglist
*dummy_args
;
12891 /* Skip this finalizer if we already resolved it. */
12892 if (list
->proc_tree
)
12894 if (list
->proc_tree
->n
.sym
->formal
->sym
->as
== NULL
12895 || list
->proc_tree
->n
.sym
->formal
->sym
->as
->rank
== 0)
12896 seen_scalar
= true;
12897 prev_link
= &(list
->next
);
12901 /* Check this exists and is a SUBROUTINE. */
12902 if (!list
->proc_sym
->attr
.subroutine
)
12904 gfc_error ("FINAL procedure %qs at %L is not a SUBROUTINE",
12905 list
->proc_sym
->name
, &list
->where
);
12909 /* We should have exactly one argument. */
12910 dummy_args
= gfc_sym_get_dummy_args (list
->proc_sym
);
12911 if (!dummy_args
|| dummy_args
->next
)
12913 gfc_error ("FINAL procedure at %L must have exactly one argument",
12917 arg
= dummy_args
->sym
;
12919 /* This argument must be of our type. */
12920 if (arg
->ts
.type
!= BT_DERIVED
|| arg
->ts
.u
.derived
!= derived
)
12922 gfc_error ("Argument of FINAL procedure at %L must be of type %qs",
12923 &arg
->declared_at
, derived
->name
);
12927 /* It must neither be a pointer nor allocatable nor optional. */
12928 if (arg
->attr
.pointer
)
12930 gfc_error ("Argument of FINAL procedure at %L must not be a POINTER",
12931 &arg
->declared_at
);
12934 if (arg
->attr
.allocatable
)
12936 gfc_error ("Argument of FINAL procedure at %L must not be"
12937 " ALLOCATABLE", &arg
->declared_at
);
12940 if (arg
->attr
.optional
)
12942 gfc_error ("Argument of FINAL procedure at %L must not be OPTIONAL",
12943 &arg
->declared_at
);
12947 /* It must not be INTENT(OUT). */
12948 if (arg
->attr
.intent
== INTENT_OUT
)
12950 gfc_error ("Argument of FINAL procedure at %L must not be"
12951 " INTENT(OUT)", &arg
->declared_at
);
12955 /* Warn if the procedure is non-scalar and not assumed shape. */
12956 if (warn_surprising
&& arg
->as
&& arg
->as
->rank
!= 0
12957 && arg
->as
->type
!= AS_ASSUMED_SHAPE
)
12958 gfc_warning (OPT_Wsurprising
,
12959 "Non-scalar FINAL procedure at %L should have assumed"
12960 " shape argument", &arg
->declared_at
);
12962 /* Check that it does not match in kind and rank with a FINAL procedure
12963 defined earlier. To really loop over the *earlier* declarations,
12964 we need to walk the tail of the list as new ones were pushed at the
12966 /* TODO: Handle kind parameters once they are implemented. */
12967 my_rank
= (arg
->as
? arg
->as
->rank
: 0);
12968 for (i
= list
->next
; i
; i
= i
->next
)
12970 gfc_formal_arglist
*dummy_args
;
12972 /* Argument list might be empty; that is an error signalled earlier,
12973 but we nevertheless continued resolving. */
12974 dummy_args
= gfc_sym_get_dummy_args (i
->proc_sym
);
12977 gfc_symbol
* i_arg
= dummy_args
->sym
;
12978 const int i_rank
= (i_arg
->as
? i_arg
->as
->rank
: 0);
12979 if (i_rank
== my_rank
)
12981 gfc_error ("FINAL procedure %qs declared at %L has the same"
12982 " rank (%d) as %qs",
12983 list
->proc_sym
->name
, &list
->where
, my_rank
,
12984 i
->proc_sym
->name
);
12990 /* Is this the/a scalar finalizer procedure? */
12992 seen_scalar
= true;
12994 /* Find the symtree for this procedure. */
12995 gcc_assert (!list
->proc_tree
);
12996 list
->proc_tree
= gfc_find_sym_in_symtree (list
->proc_sym
);
12998 prev_link
= &list
->next
;
13001 /* Remove wrong nodes immediately from the list so we don't risk any
13002 troubles in the future when they might fail later expectations. */
13005 *prev_link
= list
->next
;
13006 gfc_free_finalizer (i
);
13010 if (result
== false)
13013 /* Warn if we haven't seen a scalar finalizer procedure (but we know there
13014 were nodes in the list, must have been for arrays. It is surely a good
13015 idea to have a scalar version there if there's something to finalize. */
13016 if (warn_surprising
&& derived
->f2k_derived
->finalizers
&& !seen_scalar
)
13017 gfc_warning (OPT_Wsurprising
,
13018 "Only array FINAL procedures declared for derived type %qs"
13019 " defined at %L, suggest also scalar one",
13020 derived
->name
, &derived
->declared_at
);
13022 vtab
= gfc_find_derived_vtab (derived
);
13023 c
= vtab
->ts
.u
.derived
->components
->next
->next
->next
->next
->next
;
13024 gfc_set_sym_referenced (c
->initializer
->symtree
->n
.sym
);
13027 *finalizable
= true;
13033 /* Check if two GENERIC targets are ambiguous and emit an error is they are. */
13036 check_generic_tbp_ambiguity (gfc_tbp_generic
* t1
, gfc_tbp_generic
* t2
,
13037 const char* generic_name
, locus where
)
13039 gfc_symbol
*sym1
, *sym2
;
13040 const char *pass1
, *pass2
;
13041 gfc_formal_arglist
*dummy_args
;
13043 gcc_assert (t1
->specific
&& t2
->specific
);
13044 gcc_assert (!t1
->specific
->is_generic
);
13045 gcc_assert (!t2
->specific
->is_generic
);
13046 gcc_assert (t1
->is_operator
== t2
->is_operator
);
13048 sym1
= t1
->specific
->u
.specific
->n
.sym
;
13049 sym2
= t2
->specific
->u
.specific
->n
.sym
;
13054 /* Both must be SUBROUTINEs or both must be FUNCTIONs. */
13055 if (sym1
->attr
.subroutine
!= sym2
->attr
.subroutine
13056 || sym1
->attr
.function
!= sym2
->attr
.function
)
13058 gfc_error ("%qs and %qs can't be mixed FUNCTION/SUBROUTINE for"
13059 " GENERIC %qs at %L",
13060 sym1
->name
, sym2
->name
, generic_name
, &where
);
13064 /* Determine PASS arguments. */
13065 if (t1
->specific
->nopass
)
13067 else if (t1
->specific
->pass_arg
)
13068 pass1
= t1
->specific
->pass_arg
;
13071 dummy_args
= gfc_sym_get_dummy_args (t1
->specific
->u
.specific
->n
.sym
);
13073 pass1
= dummy_args
->sym
->name
;
13077 if (t2
->specific
->nopass
)
13079 else if (t2
->specific
->pass_arg
)
13080 pass2
= t2
->specific
->pass_arg
;
13083 dummy_args
= gfc_sym_get_dummy_args (t2
->specific
->u
.specific
->n
.sym
);
13085 pass2
= dummy_args
->sym
->name
;
13090 /* Compare the interfaces. */
13091 if (gfc_compare_interfaces (sym1
, sym2
, sym2
->name
, !t1
->is_operator
, 0,
13092 NULL
, 0, pass1
, pass2
))
13094 gfc_error ("%qs and %qs for GENERIC %qs at %L are ambiguous",
13095 sym1
->name
, sym2
->name
, generic_name
, &where
);
13103 /* Worker function for resolving a generic procedure binding; this is used to
13104 resolve GENERIC as well as user and intrinsic OPERATOR typebound procedures.
13106 The difference between those cases is finding possible inherited bindings
13107 that are overridden, as one has to look for them in tb_sym_root,
13108 tb_uop_root or tb_op, respectively. Thus the caller must already find
13109 the super-type and set p->overridden correctly. */
13112 resolve_tb_generic_targets (gfc_symbol
* super_type
,
13113 gfc_typebound_proc
* p
, const char* name
)
13115 gfc_tbp_generic
* target
;
13116 gfc_symtree
* first_target
;
13117 gfc_symtree
* inherited
;
13119 gcc_assert (p
&& p
->is_generic
);
13121 /* Try to find the specific bindings for the symtrees in our target-list. */
13122 gcc_assert (p
->u
.generic
);
13123 for (target
= p
->u
.generic
; target
; target
= target
->next
)
13124 if (!target
->specific
)
13126 gfc_typebound_proc
* overridden_tbp
;
13127 gfc_tbp_generic
* g
;
13128 const char* target_name
;
13130 target_name
= target
->specific_st
->name
;
13132 /* Defined for this type directly. */
13133 if (target
->specific_st
->n
.tb
&& !target
->specific_st
->n
.tb
->error
)
13135 target
->specific
= target
->specific_st
->n
.tb
;
13136 goto specific_found
;
13139 /* Look for an inherited specific binding. */
13142 inherited
= gfc_find_typebound_proc (super_type
, NULL
, target_name
,
13147 gcc_assert (inherited
->n
.tb
);
13148 target
->specific
= inherited
->n
.tb
;
13149 goto specific_found
;
13153 gfc_error ("Undefined specific binding %qs as target of GENERIC %qs"
13154 " at %L", target_name
, name
, &p
->where
);
13157 /* Once we've found the specific binding, check it is not ambiguous with
13158 other specifics already found or inherited for the same GENERIC. */
13160 gcc_assert (target
->specific
);
13162 /* This must really be a specific binding! */
13163 if (target
->specific
->is_generic
)
13165 gfc_error ("GENERIC %qs at %L must target a specific binding,"
13166 " %qs is GENERIC, too", name
, &p
->where
, target_name
);
13170 /* Check those already resolved on this type directly. */
13171 for (g
= p
->u
.generic
; g
; g
= g
->next
)
13172 if (g
!= target
&& g
->specific
13173 && !check_generic_tbp_ambiguity (target
, g
, name
, p
->where
))
13176 /* Check for ambiguity with inherited specific targets. */
13177 for (overridden_tbp
= p
->overridden
; overridden_tbp
;
13178 overridden_tbp
= overridden_tbp
->overridden
)
13179 if (overridden_tbp
->is_generic
)
13181 for (g
= overridden_tbp
->u
.generic
; g
; g
= g
->next
)
13183 gcc_assert (g
->specific
);
13184 if (!check_generic_tbp_ambiguity (target
, g
, name
, p
->where
))
13190 /* If we attempt to "overwrite" a specific binding, this is an error. */
13191 if (p
->overridden
&& !p
->overridden
->is_generic
)
13193 gfc_error ("GENERIC %qs at %L can't overwrite specific binding with"
13194 " the same name", name
, &p
->where
);
13198 /* Take the SUBROUTINE/FUNCTION attributes of the first specific target, as
13199 all must have the same attributes here. */
13200 first_target
= p
->u
.generic
->specific
->u
.specific
;
13201 gcc_assert (first_target
);
13202 p
->subroutine
= first_target
->n
.sym
->attr
.subroutine
;
13203 p
->function
= first_target
->n
.sym
->attr
.function
;
13209 /* Resolve a GENERIC procedure binding for a derived type. */
13212 resolve_typebound_generic (gfc_symbol
* derived
, gfc_symtree
* st
)
13214 gfc_symbol
* super_type
;
13216 /* Find the overridden binding if any. */
13217 st
->n
.tb
->overridden
= NULL
;
13218 super_type
= gfc_get_derived_super_type (derived
);
13221 gfc_symtree
* overridden
;
13222 overridden
= gfc_find_typebound_proc (super_type
, NULL
, st
->name
,
13225 if (overridden
&& overridden
->n
.tb
)
13226 st
->n
.tb
->overridden
= overridden
->n
.tb
;
13229 /* Resolve using worker function. */
13230 return resolve_tb_generic_targets (super_type
, st
->n
.tb
, st
->name
);
13234 /* Retrieve the target-procedure of an operator binding and do some checks in
13235 common for intrinsic and user-defined type-bound operators. */
13238 get_checked_tb_operator_target (gfc_tbp_generic
* target
, locus where
)
13240 gfc_symbol
* target_proc
;
13242 gcc_assert (target
->specific
&& !target
->specific
->is_generic
);
13243 target_proc
= target
->specific
->u
.specific
->n
.sym
;
13244 gcc_assert (target_proc
);
13246 /* F08:C468. All operator bindings must have a passed-object dummy argument. */
13247 if (target
->specific
->nopass
)
13249 gfc_error ("Type-bound operator at %L can't be NOPASS", &where
);
13253 return target_proc
;
13257 /* Resolve a type-bound intrinsic operator. */
13260 resolve_typebound_intrinsic_op (gfc_symbol
* derived
, gfc_intrinsic_op op
,
13261 gfc_typebound_proc
* p
)
13263 gfc_symbol
* super_type
;
13264 gfc_tbp_generic
* target
;
13266 /* If there's already an error here, do nothing (but don't fail again). */
13270 /* Operators should always be GENERIC bindings. */
13271 gcc_assert (p
->is_generic
);
13273 /* Look for an overridden binding. */
13274 super_type
= gfc_get_derived_super_type (derived
);
13275 if (super_type
&& super_type
->f2k_derived
)
13276 p
->overridden
= gfc_find_typebound_intrinsic_op (super_type
, NULL
,
13279 p
->overridden
= NULL
;
13281 /* Resolve general GENERIC properties using worker function. */
13282 if (!resolve_tb_generic_targets (super_type
, p
, gfc_op2string(op
)))
13285 /* Check the targets to be procedures of correct interface. */
13286 for (target
= p
->u
.generic
; target
; target
= target
->next
)
13288 gfc_symbol
* target_proc
;
13290 target_proc
= get_checked_tb_operator_target (target
, p
->where
);
13294 if (!gfc_check_operator_interface (target_proc
, op
, p
->where
))
13297 /* Add target to non-typebound operator list. */
13298 if (!target
->specific
->deferred
&& !derived
->attr
.use_assoc
13299 && p
->access
!= ACCESS_PRIVATE
&& derived
->ns
== gfc_current_ns
)
13301 gfc_interface
*head
, *intr
;
13303 /* Preempt 'gfc_check_new_interface' for submodules, where the
13304 mechanism for handling module procedures winds up resolving
13305 operator interfaces twice and would otherwise cause an error. */
13306 for (intr
= derived
->ns
->op
[op
]; intr
; intr
= intr
->next
)
13307 if (intr
->sym
== target_proc
13308 && target_proc
->attr
.used_in_submodule
)
13311 if (!gfc_check_new_interface (derived
->ns
->op
[op
],
13312 target_proc
, p
->where
))
13314 head
= derived
->ns
->op
[op
];
13315 intr
= gfc_get_interface ();
13316 intr
->sym
= target_proc
;
13317 intr
->where
= p
->where
;
13319 derived
->ns
->op
[op
] = intr
;
13331 /* Resolve a type-bound user operator (tree-walker callback). */
13333 static gfc_symbol
* resolve_bindings_derived
;
13334 static bool resolve_bindings_result
;
13336 static bool check_uop_procedure (gfc_symbol
* sym
, locus where
);
13339 resolve_typebound_user_op (gfc_symtree
* stree
)
13341 gfc_symbol
* super_type
;
13342 gfc_tbp_generic
* target
;
13344 gcc_assert (stree
&& stree
->n
.tb
);
13346 if (stree
->n
.tb
->error
)
13349 /* Operators should always be GENERIC bindings. */
13350 gcc_assert (stree
->n
.tb
->is_generic
);
13352 /* Find overridden procedure, if any. */
13353 super_type
= gfc_get_derived_super_type (resolve_bindings_derived
);
13354 if (super_type
&& super_type
->f2k_derived
)
13356 gfc_symtree
* overridden
;
13357 overridden
= gfc_find_typebound_user_op (super_type
, NULL
,
13358 stree
->name
, true, NULL
);
13360 if (overridden
&& overridden
->n
.tb
)
13361 stree
->n
.tb
->overridden
= overridden
->n
.tb
;
13364 stree
->n
.tb
->overridden
= NULL
;
13366 /* Resolve basically using worker function. */
13367 if (!resolve_tb_generic_targets (super_type
, stree
->n
.tb
, stree
->name
))
13370 /* Check the targets to be functions of correct interface. */
13371 for (target
= stree
->n
.tb
->u
.generic
; target
; target
= target
->next
)
13373 gfc_symbol
* target_proc
;
13375 target_proc
= get_checked_tb_operator_target (target
, stree
->n
.tb
->where
);
13379 if (!check_uop_procedure (target_proc
, stree
->n
.tb
->where
))
13386 resolve_bindings_result
= false;
13387 stree
->n
.tb
->error
= 1;
13391 /* Resolve the type-bound procedures for a derived type. */
13394 resolve_typebound_procedure (gfc_symtree
* stree
)
13398 gfc_symbol
* me_arg
;
13399 gfc_symbol
* super_type
;
13400 gfc_component
* comp
;
13402 gcc_assert (stree
);
13404 /* Undefined specific symbol from GENERIC target definition. */
13408 if (stree
->n
.tb
->error
)
13411 /* If this is a GENERIC binding, use that routine. */
13412 if (stree
->n
.tb
->is_generic
)
13414 if (!resolve_typebound_generic (resolve_bindings_derived
, stree
))
13419 /* Get the target-procedure to check it. */
13420 gcc_assert (!stree
->n
.tb
->is_generic
);
13421 gcc_assert (stree
->n
.tb
->u
.specific
);
13422 proc
= stree
->n
.tb
->u
.specific
->n
.sym
;
13423 where
= stree
->n
.tb
->where
;
13425 /* Default access should already be resolved from the parser. */
13426 gcc_assert (stree
->n
.tb
->access
!= ACCESS_UNKNOWN
);
13428 if (stree
->n
.tb
->deferred
)
13430 if (!check_proc_interface (proc
, &where
))
13435 /* Check for F08:C465. */
13436 if ((!proc
->attr
.subroutine
&& !proc
->attr
.function
)
13437 || (proc
->attr
.proc
!= PROC_MODULE
13438 && proc
->attr
.if_source
!= IFSRC_IFBODY
)
13439 || proc
->attr
.abstract
)
13441 gfc_error ("%qs must be a module procedure or an external procedure with"
13442 " an explicit interface at %L", proc
->name
, &where
);
13447 stree
->n
.tb
->subroutine
= proc
->attr
.subroutine
;
13448 stree
->n
.tb
->function
= proc
->attr
.function
;
13450 /* Find the super-type of the current derived type. We could do this once and
13451 store in a global if speed is needed, but as long as not I believe this is
13452 more readable and clearer. */
13453 super_type
= gfc_get_derived_super_type (resolve_bindings_derived
);
13455 /* If PASS, resolve and check arguments if not already resolved / loaded
13456 from a .mod file. */
13457 if (!stree
->n
.tb
->nopass
&& stree
->n
.tb
->pass_arg_num
== 0)
13459 gfc_formal_arglist
*dummy_args
;
13461 dummy_args
= gfc_sym_get_dummy_args (proc
);
13462 if (stree
->n
.tb
->pass_arg
)
13464 gfc_formal_arglist
*i
;
13466 /* If an explicit passing argument name is given, walk the arg-list
13467 and look for it. */
13470 stree
->n
.tb
->pass_arg_num
= 1;
13471 for (i
= dummy_args
; i
; i
= i
->next
)
13473 if (!strcmp (i
->sym
->name
, stree
->n
.tb
->pass_arg
))
13478 ++stree
->n
.tb
->pass_arg_num
;
13483 gfc_error ("Procedure %qs with PASS(%s) at %L has no"
13485 proc
->name
, stree
->n
.tb
->pass_arg
, &where
,
13486 stree
->n
.tb
->pass_arg
);
13492 /* Otherwise, take the first one; there should in fact be at least
13494 stree
->n
.tb
->pass_arg_num
= 1;
13497 gfc_error ("Procedure %qs with PASS at %L must have at"
13498 " least one argument", proc
->name
, &where
);
13501 me_arg
= dummy_args
->sym
;
13504 /* Now check that the argument-type matches and the passed-object
13505 dummy argument is generally fine. */
13507 gcc_assert (me_arg
);
13509 if (me_arg
->ts
.type
!= BT_CLASS
)
13511 gfc_error ("Non-polymorphic passed-object dummy argument of %qs"
13512 " at %L", proc
->name
, &where
);
13516 if (CLASS_DATA (me_arg
)->ts
.u
.derived
13517 != resolve_bindings_derived
)
13519 gfc_error ("Argument %qs of %qs with PASS(%s) at %L must be of"
13520 " the derived-type %qs", me_arg
->name
, proc
->name
,
13521 me_arg
->name
, &where
, resolve_bindings_derived
->name
);
13525 gcc_assert (me_arg
->ts
.type
== BT_CLASS
);
13526 if (CLASS_DATA (me_arg
)->as
&& CLASS_DATA (me_arg
)->as
->rank
!= 0)
13528 gfc_error ("Passed-object dummy argument of %qs at %L must be"
13529 " scalar", proc
->name
, &where
);
13532 if (CLASS_DATA (me_arg
)->attr
.allocatable
)
13534 gfc_error ("Passed-object dummy argument of %qs at %L must not"
13535 " be ALLOCATABLE", proc
->name
, &where
);
13538 if (CLASS_DATA (me_arg
)->attr
.class_pointer
)
13540 gfc_error ("Passed-object dummy argument of %qs at %L must not"
13541 " be POINTER", proc
->name
, &where
);
13546 /* If we are extending some type, check that we don't override a procedure
13547 flagged NON_OVERRIDABLE. */
13548 stree
->n
.tb
->overridden
= NULL
;
13551 gfc_symtree
* overridden
;
13552 overridden
= gfc_find_typebound_proc (super_type
, NULL
,
13553 stree
->name
, true, NULL
);
13557 if (overridden
->n
.tb
)
13558 stree
->n
.tb
->overridden
= overridden
->n
.tb
;
13560 if (!gfc_check_typebound_override (stree
, overridden
))
13565 /* See if there's a name collision with a component directly in this type. */
13566 for (comp
= resolve_bindings_derived
->components
; comp
; comp
= comp
->next
)
13567 if (!strcmp (comp
->name
, stree
->name
))
13569 gfc_error ("Procedure %qs at %L has the same name as a component of"
13571 stree
->name
, &where
, resolve_bindings_derived
->name
);
13575 /* Try to find a name collision with an inherited component. */
13576 if (super_type
&& gfc_find_component (super_type
, stree
->name
, true, true,
13579 gfc_error ("Procedure %qs at %L has the same name as an inherited"
13580 " component of %qs",
13581 stree
->name
, &where
, resolve_bindings_derived
->name
);
13585 stree
->n
.tb
->error
= 0;
13589 resolve_bindings_result
= false;
13590 stree
->n
.tb
->error
= 1;
13595 resolve_typebound_procedures (gfc_symbol
* derived
)
13598 gfc_symbol
* super_type
;
13600 if (!derived
->f2k_derived
|| !derived
->f2k_derived
->tb_sym_root
)
13603 super_type
= gfc_get_derived_super_type (derived
);
13605 resolve_symbol (super_type
);
13607 resolve_bindings_derived
= derived
;
13608 resolve_bindings_result
= true;
13610 if (derived
->f2k_derived
->tb_sym_root
)
13611 gfc_traverse_symtree (derived
->f2k_derived
->tb_sym_root
,
13612 &resolve_typebound_procedure
);
13614 if (derived
->f2k_derived
->tb_uop_root
)
13615 gfc_traverse_symtree (derived
->f2k_derived
->tb_uop_root
,
13616 &resolve_typebound_user_op
);
13618 for (op
= 0; op
!= GFC_INTRINSIC_OPS
; ++op
)
13620 gfc_typebound_proc
* p
= derived
->f2k_derived
->tb_op
[op
];
13621 if (p
&& !resolve_typebound_intrinsic_op (derived
,
13622 (gfc_intrinsic_op
)op
, p
))
13623 resolve_bindings_result
= false;
13626 return resolve_bindings_result
;
13630 /* Add a derived type to the dt_list. The dt_list is used in trans-types.c
13631 to give all identical derived types the same backend_decl. */
13633 add_dt_to_dt_list (gfc_symbol
*derived
)
13635 if (!derived
->dt_next
)
13637 if (gfc_derived_types
)
13639 derived
->dt_next
= gfc_derived_types
->dt_next
;
13640 gfc_derived_types
->dt_next
= derived
;
13644 derived
->dt_next
= derived
;
13646 gfc_derived_types
= derived
;
13651 /* Ensure that a derived-type is really not abstract, meaning that every
13652 inherited DEFERRED binding is overridden by a non-DEFERRED one. */
13655 ensure_not_abstract_walker (gfc_symbol
* sub
, gfc_symtree
* st
)
13660 if (!ensure_not_abstract_walker (sub
, st
->left
))
13662 if (!ensure_not_abstract_walker (sub
, st
->right
))
13665 if (st
->n
.tb
&& st
->n
.tb
->deferred
)
13667 gfc_symtree
* overriding
;
13668 overriding
= gfc_find_typebound_proc (sub
, NULL
, st
->name
, true, NULL
);
13671 gcc_assert (overriding
->n
.tb
);
13672 if (overriding
->n
.tb
->deferred
)
13674 gfc_error ("Derived-type %qs declared at %L must be ABSTRACT because"
13675 " %qs is DEFERRED and not overridden",
13676 sub
->name
, &sub
->declared_at
, st
->name
);
13685 ensure_not_abstract (gfc_symbol
* sub
, gfc_symbol
* ancestor
)
13687 /* The algorithm used here is to recursively travel up the ancestry of sub
13688 and for each ancestor-type, check all bindings. If any of them is
13689 DEFERRED, look it up starting from sub and see if the found (overriding)
13690 binding is not DEFERRED.
13691 This is not the most efficient way to do this, but it should be ok and is
13692 clearer than something sophisticated. */
13694 gcc_assert (ancestor
&& !sub
->attr
.abstract
);
13696 if (!ancestor
->attr
.abstract
)
13699 /* Walk bindings of this ancestor. */
13700 if (ancestor
->f2k_derived
)
13703 t
= ensure_not_abstract_walker (sub
, ancestor
->f2k_derived
->tb_sym_root
);
13708 /* Find next ancestor type and recurse on it. */
13709 ancestor
= gfc_get_derived_super_type (ancestor
);
13711 return ensure_not_abstract (sub
, ancestor
);
13717 /* This check for typebound defined assignments is done recursively
13718 since the order in which derived types are resolved is not always in
13719 order of the declarations. */
13722 check_defined_assignments (gfc_symbol
*derived
)
13726 for (c
= derived
->components
; c
; c
= c
->next
)
13728 if (!gfc_bt_struct (c
->ts
.type
)
13730 || c
->attr
.allocatable
13731 || c
->attr
.proc_pointer_comp
13732 || c
->attr
.class_pointer
13733 || c
->attr
.proc_pointer
)
13736 if (c
->ts
.u
.derived
->attr
.defined_assign_comp
13737 || (c
->ts
.u
.derived
->f2k_derived
13738 && c
->ts
.u
.derived
->f2k_derived
->tb_op
[INTRINSIC_ASSIGN
]))
13740 derived
->attr
.defined_assign_comp
= 1;
13744 check_defined_assignments (c
->ts
.u
.derived
);
13745 if (c
->ts
.u
.derived
->attr
.defined_assign_comp
)
13747 derived
->attr
.defined_assign_comp
= 1;
13754 /* Resolve a single component of a derived type or structure. */
13757 resolve_component (gfc_component
*c
, gfc_symbol
*sym
)
13759 gfc_symbol
*super_type
;
13761 if (c
->attr
.artificial
)
13764 /* Do not allow vtype components to be resolved in nameless namespaces
13765 such as block data because the procedure pointers will cause ICEs
13766 and vtables are not needed in these contexts. */
13767 if (sym
->attr
.vtype
&& sym
->attr
.use_assoc
13768 && sym
->ns
->proc_name
== NULL
)
13772 if ((!sym
->attr
.is_class
|| c
!= sym
->components
)
13773 && c
->attr
.codimension
13774 && (!c
->attr
.allocatable
|| (c
->as
&& c
->as
->type
!= AS_DEFERRED
)))
13776 gfc_error ("Coarray component %qs at %L must be allocatable with "
13777 "deferred shape", c
->name
, &c
->loc
);
13782 if (c
->attr
.codimension
&& c
->ts
.type
== BT_DERIVED
13783 && c
->ts
.u
.derived
->ts
.is_iso_c
)
13785 gfc_error ("Component %qs at %L of TYPE(C_PTR) or TYPE(C_FUNPTR) "
13786 "shall not be a coarray", c
->name
, &c
->loc
);
13791 if (gfc_bt_struct (c
->ts
.type
) && c
->ts
.u
.derived
->attr
.coarray_comp
13792 && (c
->attr
.codimension
|| c
->attr
.pointer
|| c
->attr
.dimension
13793 || c
->attr
.allocatable
))
13795 gfc_error ("Component %qs at %L with coarray component "
13796 "shall be a nonpointer, nonallocatable scalar",
13802 if (c
->attr
.contiguous
&& (!c
->attr
.dimension
|| !c
->attr
.pointer
))
13804 gfc_error ("Component %qs at %L has the CONTIGUOUS attribute but "
13805 "is not an array pointer", c
->name
, &c
->loc
);
13809 /* F2003, 15.2.1 - length has to be one. */
13810 if (sym
->attr
.is_bind_c
&& c
->ts
.type
== BT_CHARACTER
13811 && (c
->ts
.u
.cl
== NULL
|| c
->ts
.u
.cl
->length
== NULL
13812 || !gfc_is_constant_expr (c
->ts
.u
.cl
->length
)
13813 || mpz_cmp_si (c
->ts
.u
.cl
->length
->value
.integer
, 1) != 0))
13815 gfc_error ("Component %qs of BIND(C) type at %L must have length one",
13820 if (c
->attr
.proc_pointer
&& c
->ts
.interface
)
13822 gfc_symbol
*ifc
= c
->ts
.interface
;
13824 if (!sym
->attr
.vtype
&& !check_proc_interface (ifc
, &c
->loc
))
13830 if (ifc
->attr
.if_source
|| ifc
->attr
.intrinsic
)
13832 /* Resolve interface and copy attributes. */
13833 if (ifc
->formal
&& !ifc
->formal_ns
)
13834 resolve_symbol (ifc
);
13835 if (ifc
->attr
.intrinsic
)
13836 gfc_resolve_intrinsic (ifc
, &ifc
->declared_at
);
13840 c
->ts
= ifc
->result
->ts
;
13841 c
->attr
.allocatable
= ifc
->result
->attr
.allocatable
;
13842 c
->attr
.pointer
= ifc
->result
->attr
.pointer
;
13843 c
->attr
.dimension
= ifc
->result
->attr
.dimension
;
13844 c
->as
= gfc_copy_array_spec (ifc
->result
->as
);
13845 c
->attr
.class_ok
= ifc
->result
->attr
.class_ok
;
13850 c
->attr
.allocatable
= ifc
->attr
.allocatable
;
13851 c
->attr
.pointer
= ifc
->attr
.pointer
;
13852 c
->attr
.dimension
= ifc
->attr
.dimension
;
13853 c
->as
= gfc_copy_array_spec (ifc
->as
);
13854 c
->attr
.class_ok
= ifc
->attr
.class_ok
;
13856 c
->ts
.interface
= ifc
;
13857 c
->attr
.function
= ifc
->attr
.function
;
13858 c
->attr
.subroutine
= ifc
->attr
.subroutine
;
13860 c
->attr
.pure
= ifc
->attr
.pure
;
13861 c
->attr
.elemental
= ifc
->attr
.elemental
;
13862 c
->attr
.recursive
= ifc
->attr
.recursive
;
13863 c
->attr
.always_explicit
= ifc
->attr
.always_explicit
;
13864 c
->attr
.ext_attr
|= ifc
->attr
.ext_attr
;
13865 /* Copy char length. */
13866 if (ifc
->ts
.type
== BT_CHARACTER
&& ifc
->ts
.u
.cl
)
13868 gfc_charlen
*cl
= gfc_new_charlen (sym
->ns
, ifc
->ts
.u
.cl
);
13869 if (cl
->length
&& !cl
->resolved
13870 && !gfc_resolve_expr (cl
->length
))
13879 else if (c
->attr
.proc_pointer
&& c
->ts
.type
== BT_UNKNOWN
)
13881 /* Since PPCs are not implicitly typed, a PPC without an explicit
13882 interface must be a subroutine. */
13883 gfc_add_subroutine (&c
->attr
, c
->name
, &c
->loc
);
13886 /* Procedure pointer components: Check PASS arg. */
13887 if (c
->attr
.proc_pointer
&& !c
->tb
->nopass
&& c
->tb
->pass_arg_num
== 0
13888 && !sym
->attr
.vtype
)
13890 gfc_symbol
* me_arg
;
13892 if (c
->tb
->pass_arg
)
13894 gfc_formal_arglist
* i
;
13896 /* If an explicit passing argument name is given, walk the arg-list
13897 and look for it. */
13900 c
->tb
->pass_arg_num
= 1;
13901 for (i
= c
->ts
.interface
->formal
; i
; i
= i
->next
)
13903 if (!strcmp (i
->sym
->name
, c
->tb
->pass_arg
))
13908 c
->tb
->pass_arg_num
++;
13913 gfc_error ("Procedure pointer component %qs with PASS(%s) "
13914 "at %L has no argument %qs", c
->name
,
13915 c
->tb
->pass_arg
, &c
->loc
, c
->tb
->pass_arg
);
13922 /* Otherwise, take the first one; there should in fact be at least
13924 c
->tb
->pass_arg_num
= 1;
13925 if (!c
->ts
.interface
->formal
)
13927 gfc_error ("Procedure pointer component %qs with PASS at %L "
13928 "must have at least one argument",
13933 me_arg
= c
->ts
.interface
->formal
->sym
;
13936 /* Now check that the argument-type matches. */
13937 gcc_assert (me_arg
);
13938 if ((me_arg
->ts
.type
!= BT_DERIVED
&& me_arg
->ts
.type
!= BT_CLASS
)
13939 || (me_arg
->ts
.type
== BT_DERIVED
&& me_arg
->ts
.u
.derived
!= sym
)
13940 || (me_arg
->ts
.type
== BT_CLASS
13941 && CLASS_DATA (me_arg
)->ts
.u
.derived
!= sym
))
13943 gfc_error ("Argument %qs of %qs with PASS(%s) at %L must be of"
13944 " the derived type %qs", me_arg
->name
, c
->name
,
13945 me_arg
->name
, &c
->loc
, sym
->name
);
13950 /* Check for F03:C453. */
13951 if (CLASS_DATA (me_arg
)->attr
.dimension
)
13953 gfc_error ("Argument %qs of %qs with PASS(%s) at %L "
13954 "must be scalar", me_arg
->name
, c
->name
, me_arg
->name
,
13960 if (CLASS_DATA (me_arg
)->attr
.class_pointer
)
13962 gfc_error ("Argument %qs of %qs with PASS(%s) at %L "
13963 "may not have the POINTER attribute", me_arg
->name
,
13964 c
->name
, me_arg
->name
, &c
->loc
);
13969 if (CLASS_DATA (me_arg
)->attr
.allocatable
)
13971 gfc_error ("Argument %qs of %qs with PASS(%s) at %L "
13972 "may not be ALLOCATABLE", me_arg
->name
, c
->name
,
13973 me_arg
->name
, &c
->loc
);
13978 if (gfc_type_is_extensible (sym
) && me_arg
->ts
.type
!= BT_CLASS
)
13980 gfc_error ("Non-polymorphic passed-object dummy argument of %qs"
13981 " at %L", c
->name
, &c
->loc
);
13987 /* Check type-spec if this is not the parent-type component. */
13988 if (((sym
->attr
.is_class
13989 && (!sym
->components
->ts
.u
.derived
->attr
.extension
13990 || c
!= sym
->components
->ts
.u
.derived
->components
))
13991 || (!sym
->attr
.is_class
13992 && (!sym
->attr
.extension
|| c
!= sym
->components
)))
13993 && !sym
->attr
.vtype
13994 && !resolve_typespec_used (&c
->ts
, &c
->loc
, c
->name
))
13997 super_type
= gfc_get_derived_super_type (sym
);
13999 /* If this type is an extension, set the accessibility of the parent
14002 && ((sym
->attr
.is_class
14003 && c
== sym
->components
->ts
.u
.derived
->components
)
14004 || (!sym
->attr
.is_class
&& c
== sym
->components
))
14005 && strcmp (super_type
->name
, c
->name
) == 0)
14006 c
->attr
.access
= super_type
->attr
.access
;
14008 /* If this type is an extension, see if this component has the same name
14009 as an inherited type-bound procedure. */
14010 if (super_type
&& !sym
->attr
.is_class
14011 && gfc_find_typebound_proc (super_type
, NULL
, c
->name
, true, NULL
))
14013 gfc_error ("Component %qs of %qs at %L has the same name as an"
14014 " inherited type-bound procedure",
14015 c
->name
, sym
->name
, &c
->loc
);
14019 if (c
->ts
.type
== BT_CHARACTER
&& !c
->attr
.proc_pointer
14020 && !c
->ts
.deferred
)
14022 if (c
->ts
.u
.cl
->length
== NULL
14023 || (!resolve_charlen(c
->ts
.u
.cl
))
14024 || !gfc_is_constant_expr (c
->ts
.u
.cl
->length
))
14026 gfc_error ("Character length of component %qs needs to "
14027 "be a constant specification expression at %L",
14029 c
->ts
.u
.cl
->length
? &c
->ts
.u
.cl
->length
->where
: &c
->loc
);
14034 if (c
->ts
.type
== BT_CHARACTER
&& c
->ts
.deferred
14035 && !c
->attr
.pointer
&& !c
->attr
.allocatable
)
14037 gfc_error ("Character component %qs of %qs at %L with deferred "
14038 "length must be a POINTER or ALLOCATABLE",
14039 c
->name
, sym
->name
, &c
->loc
);
14043 /* Add the hidden deferred length field. */
14044 if (c
->ts
.type
== BT_CHARACTER
14045 && (c
->ts
.deferred
|| c
->attr
.pdt_string
)
14046 && !c
->attr
.function
14047 && !sym
->attr
.is_class
)
14049 char name
[GFC_MAX_SYMBOL_LEN
+9];
14050 gfc_component
*strlen
;
14051 sprintf (name
, "_%s_length", c
->name
);
14052 strlen
= gfc_find_component (sym
, name
, true, true, NULL
);
14053 if (strlen
== NULL
)
14055 if (!gfc_add_component (sym
, name
, &strlen
))
14057 strlen
->ts
.type
= BT_INTEGER
;
14058 strlen
->ts
.kind
= gfc_charlen_int_kind
;
14059 strlen
->attr
.access
= ACCESS_PRIVATE
;
14060 strlen
->attr
.artificial
= 1;
14064 if (c
->ts
.type
== BT_DERIVED
14065 && sym
->component_access
!= ACCESS_PRIVATE
14066 && gfc_check_symbol_access (sym
)
14067 && !is_sym_host_assoc (c
->ts
.u
.derived
, sym
->ns
)
14068 && !c
->ts
.u
.derived
->attr
.use_assoc
14069 && !gfc_check_symbol_access (c
->ts
.u
.derived
)
14070 && !gfc_notify_std (GFC_STD_F2003
, "the component %qs is a "
14071 "PRIVATE type and cannot be a component of "
14072 "%qs, which is PUBLIC at %L", c
->name
,
14073 sym
->name
, &sym
->declared_at
))
14076 if ((sym
->attr
.sequence
|| sym
->attr
.is_bind_c
) && c
->ts
.type
== BT_CLASS
)
14078 gfc_error ("Polymorphic component %s at %L in SEQUENCE or BIND(C) "
14079 "type %s", c
->name
, &c
->loc
, sym
->name
);
14083 if (sym
->attr
.sequence
)
14085 if (c
->ts
.type
== BT_DERIVED
&& c
->ts
.u
.derived
->attr
.sequence
== 0)
14087 gfc_error ("Component %s of SEQUENCE type declared at %L does "
14088 "not have the SEQUENCE attribute",
14089 c
->ts
.u
.derived
->name
, &sym
->declared_at
);
14094 if (c
->ts
.type
== BT_DERIVED
&& c
->ts
.u
.derived
->attr
.generic
)
14095 c
->ts
.u
.derived
= gfc_find_dt_in_generic (c
->ts
.u
.derived
);
14096 else if (c
->ts
.type
== BT_CLASS
&& c
->attr
.class_ok
14097 && CLASS_DATA (c
)->ts
.u
.derived
->attr
.generic
)
14098 CLASS_DATA (c
)->ts
.u
.derived
14099 = gfc_find_dt_in_generic (CLASS_DATA (c
)->ts
.u
.derived
);
14101 /* If an allocatable component derived type is of the same type as
14102 the enclosing derived type, we need a vtable generating so that
14103 the __deallocate procedure is created. */
14104 if ((c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
14105 && c
->ts
.u
.derived
== sym
&& c
->attr
.allocatable
== 1)
14106 gfc_find_vtab (&c
->ts
);
14108 /* Ensure that all the derived type components are put on the
14109 derived type list; even in formal namespaces, where derived type
14110 pointer components might not have been declared. */
14111 if (c
->ts
.type
== BT_DERIVED
14113 && c
->ts
.u
.derived
->components
14115 && sym
!= c
->ts
.u
.derived
)
14116 add_dt_to_dt_list (c
->ts
.u
.derived
);
14118 if (!gfc_resolve_array_spec (c
->as
,
14119 !(c
->attr
.pointer
|| c
->attr
.proc_pointer
14120 || c
->attr
.allocatable
)))
14123 if (c
->initializer
&& !sym
->attr
.vtype
14124 && !c
->attr
.pdt_kind
&& !c
->attr
.pdt_len
14125 && !gfc_check_assign_symbol (sym
, c
, c
->initializer
))
14132 /* Be nice about the locus for a structure expression - show the locus of the
14133 first non-null sub-expression if we can. */
14136 cons_where (gfc_expr
*struct_expr
)
14138 gfc_constructor
*cons
;
14140 gcc_assert (struct_expr
&& struct_expr
->expr_type
== EXPR_STRUCTURE
);
14142 cons
= gfc_constructor_first (struct_expr
->value
.constructor
);
14143 for (; cons
; cons
= gfc_constructor_next (cons
))
14145 if (cons
->expr
&& cons
->expr
->expr_type
!= EXPR_NULL
)
14146 return &cons
->expr
->where
;
14149 return &struct_expr
->where
;
14152 /* Resolve the components of a structure type. Much less work than derived
14156 resolve_fl_struct (gfc_symbol
*sym
)
14159 gfc_expr
*init
= NULL
;
14162 /* Make sure UNIONs do not have overlapping initializers. */
14163 if (sym
->attr
.flavor
== FL_UNION
)
14165 for (c
= sym
->components
; c
; c
= c
->next
)
14167 if (init
&& c
->initializer
)
14169 gfc_error ("Conflicting initializers in union at %L and %L",
14170 cons_where (init
), cons_where (c
->initializer
));
14171 gfc_free_expr (c
->initializer
);
14172 c
->initializer
= NULL
;
14175 init
= c
->initializer
;
14180 for (c
= sym
->components
; c
; c
= c
->next
)
14181 if (!resolve_component (c
, sym
))
14187 if (sym
->components
)
14188 add_dt_to_dt_list (sym
);
14194 /* Resolve the components of a derived type. This does not have to wait until
14195 resolution stage, but can be done as soon as the dt declaration has been
14199 resolve_fl_derived0 (gfc_symbol
*sym
)
14201 gfc_symbol
* super_type
;
14203 gfc_formal_arglist
*f
;
14206 if (sym
->attr
.unlimited_polymorphic
)
14209 super_type
= gfc_get_derived_super_type (sym
);
14212 if (super_type
&& sym
->attr
.coarray_comp
&& !super_type
->attr
.coarray_comp
)
14214 gfc_error ("As extending type %qs at %L has a coarray component, "
14215 "parent type %qs shall also have one", sym
->name
,
14216 &sym
->declared_at
, super_type
->name
);
14220 /* Ensure the extended type gets resolved before we do. */
14221 if (super_type
&& !resolve_fl_derived0 (super_type
))
14224 /* An ABSTRACT type must be extensible. */
14225 if (sym
->attr
.abstract
&& !gfc_type_is_extensible (sym
))
14227 gfc_error ("Non-extensible derived-type %qs at %L must not be ABSTRACT",
14228 sym
->name
, &sym
->declared_at
);
14232 c
= (sym
->attr
.is_class
) ? sym
->components
->ts
.u
.derived
->components
14236 for ( ; c
!= NULL
; c
= c
->next
)
14237 if (!resolve_component (c
, sym
))
14243 /* Now add the caf token field, where needed. */
14244 if (flag_coarray
!= GFC_FCOARRAY_NONE
14245 && !sym
->attr
.is_class
&& !sym
->attr
.vtype
)
14247 for (c
= sym
->components
; c
; c
= c
->next
)
14248 if (!c
->attr
.dimension
&& !c
->attr
.codimension
14249 && (c
->attr
.allocatable
|| c
->attr
.pointer
))
14251 char name
[GFC_MAX_SYMBOL_LEN
+9];
14252 gfc_component
*token
;
14253 sprintf (name
, "_caf_%s", c
->name
);
14254 token
= gfc_find_component (sym
, name
, true, true, NULL
);
14257 if (!gfc_add_component (sym
, name
, &token
))
14259 token
->ts
.type
= BT_VOID
;
14260 token
->ts
.kind
= gfc_default_integer_kind
;
14261 token
->attr
.access
= ACCESS_PRIVATE
;
14262 token
->attr
.artificial
= 1;
14263 token
->attr
.caf_token
= 1;
14268 check_defined_assignments (sym
);
14270 if (!sym
->attr
.defined_assign_comp
&& super_type
)
14271 sym
->attr
.defined_assign_comp
14272 = super_type
->attr
.defined_assign_comp
;
14274 /* If this is a non-ABSTRACT type extending an ABSTRACT one, ensure that
14275 all DEFERRED bindings are overridden. */
14276 if (super_type
&& super_type
->attr
.abstract
&& !sym
->attr
.abstract
14277 && !sym
->attr
.is_class
14278 && !ensure_not_abstract (sym
, super_type
))
14281 /* Check that there is a component for every PDT parameter. */
14282 if (sym
->attr
.pdt_template
)
14284 for (f
= sym
->formal
; f
; f
= f
->next
)
14288 c
= gfc_find_component (sym
, f
->sym
->name
, true, true, NULL
);
14291 gfc_error ("Parameterized type %qs does not have a component "
14292 "corresponding to parameter %qs at %L", sym
->name
,
14293 f
->sym
->name
, &sym
->declared_at
);
14299 /* Add derived type to the derived type list. */
14300 add_dt_to_dt_list (sym
);
14306 /* The following procedure does the full resolution of a derived type,
14307 including resolution of all type-bound procedures (if present). In contrast
14308 to 'resolve_fl_derived0' this can only be done after the module has been
14309 parsed completely. */
14312 resolve_fl_derived (gfc_symbol
*sym
)
14314 gfc_symbol
*gen_dt
= NULL
;
14316 if (sym
->attr
.unlimited_polymorphic
)
14319 if (!sym
->attr
.is_class
)
14320 gfc_find_symbol (sym
->name
, sym
->ns
, 0, &gen_dt
);
14321 if (gen_dt
&& gen_dt
->generic
&& gen_dt
->generic
->next
14322 && (!gen_dt
->generic
->sym
->attr
.use_assoc
14323 || gen_dt
->generic
->sym
->module
!= gen_dt
->generic
->next
->sym
->module
)
14324 && !gfc_notify_std (GFC_STD_F2003
, "Generic name %qs of function "
14325 "%qs at %L being the same name as derived "
14326 "type at %L", sym
->name
,
14327 gen_dt
->generic
->sym
== sym
14328 ? gen_dt
->generic
->next
->sym
->name
14329 : gen_dt
->generic
->sym
->name
,
14330 gen_dt
->generic
->sym
== sym
14331 ? &gen_dt
->generic
->next
->sym
->declared_at
14332 : &gen_dt
->generic
->sym
->declared_at
,
14333 &sym
->declared_at
))
14336 if (sym
->components
== NULL
&& !sym
->attr
.zero_comp
&& !sym
->attr
.use_assoc
)
14338 gfc_error ("Derived type %qs at %L has not been declared",
14339 sym
->name
, &sym
->declared_at
);
14343 /* Resolve the finalizer procedures. */
14344 if (!gfc_resolve_finalizers (sym
, NULL
))
14347 if (sym
->attr
.is_class
&& sym
->ts
.u
.derived
== NULL
)
14349 /* Fix up incomplete CLASS symbols. */
14350 gfc_component
*data
= gfc_find_component (sym
, "_data", true, true, NULL
);
14351 gfc_component
*vptr
= gfc_find_component (sym
, "_vptr", true, true, NULL
);
14353 /* Nothing more to do for unlimited polymorphic entities. */
14354 if (data
->ts
.u
.derived
->attr
.unlimited_polymorphic
)
14356 else if (vptr
->ts
.u
.derived
== NULL
)
14358 gfc_symbol
*vtab
= gfc_find_derived_vtab (data
->ts
.u
.derived
);
14360 vptr
->ts
.u
.derived
= vtab
->ts
.u
.derived
;
14361 if (!resolve_fl_derived0 (vptr
->ts
.u
.derived
))
14366 if (!resolve_fl_derived0 (sym
))
14369 /* Resolve the type-bound procedures. */
14370 if (!resolve_typebound_procedures (sym
))
14373 /* Generate module vtables subject to their accessibility and their not
14374 being vtables or pdt templates. If this is not done class declarations
14375 in external procedures wind up with their own version and so SELECT TYPE
14376 fails because the vptrs do not have the same address. */
14377 if (gfc_option
.allow_std
& GFC_STD_F2003
14378 && sym
->ns
->proc_name
14379 && sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
14380 && sym
->attr
.access
!= ACCESS_PRIVATE
14381 && !(sym
->attr
.use_assoc
|| sym
->attr
.vtype
|| sym
->attr
.pdt_template
))
14383 gfc_symbol
*vtab
= gfc_find_derived_vtab (sym
);
14384 gfc_set_sym_referenced (vtab
);
14392 resolve_fl_namelist (gfc_symbol
*sym
)
14397 for (nl
= sym
->namelist
; nl
; nl
= nl
->next
)
14399 /* Check again, the check in match only works if NAMELIST comes
14401 if (nl
->sym
->as
&& nl
->sym
->as
->type
== AS_ASSUMED_SIZE
)
14403 gfc_error ("Assumed size array %qs in namelist %qs at %L is not "
14404 "allowed", nl
->sym
->name
, sym
->name
, &sym
->declared_at
);
14408 if (nl
->sym
->as
&& nl
->sym
->as
->type
== AS_ASSUMED_SHAPE
14409 && !gfc_notify_std (GFC_STD_F2003
, "NAMELIST array object %qs "
14410 "with assumed shape in namelist %qs at %L",
14411 nl
->sym
->name
, sym
->name
, &sym
->declared_at
))
14414 if (is_non_constant_shape_array (nl
->sym
)
14415 && !gfc_notify_std (GFC_STD_F2003
, "NAMELIST array object %qs "
14416 "with nonconstant shape in namelist %qs at %L",
14417 nl
->sym
->name
, sym
->name
, &sym
->declared_at
))
14420 if (nl
->sym
->ts
.type
== BT_CHARACTER
14421 && (nl
->sym
->ts
.u
.cl
->length
== NULL
14422 || !gfc_is_constant_expr (nl
->sym
->ts
.u
.cl
->length
))
14423 && !gfc_notify_std (GFC_STD_F2003
, "NAMELIST object %qs with "
14424 "nonconstant character length in "
14425 "namelist %qs at %L", nl
->sym
->name
,
14426 sym
->name
, &sym
->declared_at
))
14431 /* Reject PRIVATE objects in a PUBLIC namelist. */
14432 if (gfc_check_symbol_access (sym
))
14434 for (nl
= sym
->namelist
; nl
; nl
= nl
->next
)
14436 if (!nl
->sym
->attr
.use_assoc
14437 && !is_sym_host_assoc (nl
->sym
, sym
->ns
)
14438 && !gfc_check_symbol_access (nl
->sym
))
14440 gfc_error ("NAMELIST object %qs was declared PRIVATE and "
14441 "cannot be member of PUBLIC namelist %qs at %L",
14442 nl
->sym
->name
, sym
->name
, &sym
->declared_at
);
14446 if (nl
->sym
->ts
.type
== BT_DERIVED
14447 && (nl
->sym
->ts
.u
.derived
->attr
.alloc_comp
14448 || nl
->sym
->ts
.u
.derived
->attr
.pointer_comp
))
14450 if (!gfc_notify_std (GFC_STD_F2003
, "NAMELIST object %qs in "
14451 "namelist %qs at %L with ALLOCATABLE "
14452 "or POINTER components", nl
->sym
->name
,
14453 sym
->name
, &sym
->declared_at
))
14458 /* Types with private components that came here by USE-association. */
14459 if (nl
->sym
->ts
.type
== BT_DERIVED
14460 && derived_inaccessible (nl
->sym
->ts
.u
.derived
))
14462 gfc_error ("NAMELIST object %qs has use-associated PRIVATE "
14463 "components and cannot be member of namelist %qs at %L",
14464 nl
->sym
->name
, sym
->name
, &sym
->declared_at
);
14468 /* Types with private components that are defined in the same module. */
14469 if (nl
->sym
->ts
.type
== BT_DERIVED
14470 && !is_sym_host_assoc (nl
->sym
->ts
.u
.derived
, sym
->ns
)
14471 && nl
->sym
->ts
.u
.derived
->attr
.private_comp
)
14473 gfc_error ("NAMELIST object %qs has PRIVATE components and "
14474 "cannot be a member of PUBLIC namelist %qs at %L",
14475 nl
->sym
->name
, sym
->name
, &sym
->declared_at
);
14482 /* 14.1.2 A module or internal procedure represent local entities
14483 of the same type as a namelist member and so are not allowed. */
14484 for (nl
= sym
->namelist
; nl
; nl
= nl
->next
)
14486 if (nl
->sym
->ts
.kind
!= 0 && nl
->sym
->attr
.flavor
== FL_VARIABLE
)
14489 if (nl
->sym
->attr
.function
&& nl
->sym
== nl
->sym
->result
)
14490 if ((nl
->sym
== sym
->ns
->proc_name
)
14492 (sym
->ns
->parent
&& nl
->sym
== sym
->ns
->parent
->proc_name
))
14497 gfc_find_symbol (nl
->sym
->name
, sym
->ns
, 1, &nlsym
);
14498 if (nlsym
&& nlsym
->attr
.flavor
== FL_PROCEDURE
)
14500 gfc_error ("PROCEDURE attribute conflicts with NAMELIST "
14501 "attribute in %qs at %L", nlsym
->name
,
14502 &sym
->declared_at
);
14509 for (nl
= sym
->namelist
; nl
; nl
= nl
->next
)
14510 nl
->sym
->attr
.asynchronous
= 1;
14517 resolve_fl_parameter (gfc_symbol
*sym
)
14519 /* A parameter array's shape needs to be constant. */
14520 if (sym
->as
!= NULL
14521 && (sym
->as
->type
== AS_DEFERRED
14522 || is_non_constant_shape_array (sym
)))
14524 gfc_error ("Parameter array %qs at %L cannot be automatic "
14525 "or of deferred shape", sym
->name
, &sym
->declared_at
);
14529 /* Constraints on deferred type parameter. */
14530 if (!deferred_requirements (sym
))
14533 /* Make sure a parameter that has been implicitly typed still
14534 matches the implicit type, since PARAMETER statements can precede
14535 IMPLICIT statements. */
14536 if (sym
->attr
.implicit_type
14537 && !gfc_compare_types (&sym
->ts
, gfc_get_default_type (sym
->name
,
14540 gfc_error ("Implicitly typed PARAMETER %qs at %L doesn't match a "
14541 "later IMPLICIT type", sym
->name
, &sym
->declared_at
);
14545 /* Make sure the types of derived parameters are consistent. This
14546 type checking is deferred until resolution because the type may
14547 refer to a derived type from the host. */
14548 if (sym
->ts
.type
== BT_DERIVED
14549 && !gfc_compare_types (&sym
->ts
, &sym
->value
->ts
))
14551 gfc_error ("Incompatible derived type in PARAMETER at %L",
14552 &sym
->value
->where
);
14556 /* F03:C509,C514. */
14557 if (sym
->ts
.type
== BT_CLASS
)
14559 gfc_error ("CLASS variable %qs at %L cannot have the PARAMETER attribute",
14560 sym
->name
, &sym
->declared_at
);
14568 /* Called by resolve_symbol to check PDTs. */
14571 resolve_pdt (gfc_symbol
* sym
)
14573 gfc_symbol
*derived
= NULL
;
14574 gfc_actual_arglist
*param
;
14576 bool const_len_exprs
= true;
14577 bool assumed_len_exprs
= false;
14578 symbol_attribute
*attr
;
14580 if (sym
->ts
.type
== BT_DERIVED
)
14582 derived
= sym
->ts
.u
.derived
;
14583 attr
= &(sym
->attr
);
14585 else if (sym
->ts
.type
== BT_CLASS
)
14587 derived
= CLASS_DATA (sym
)->ts
.u
.derived
;
14588 attr
= &(CLASS_DATA (sym
)->attr
);
14591 gcc_unreachable ();
14593 gcc_assert (derived
->attr
.pdt_type
);
14595 for (param
= sym
->param_list
; param
; param
= param
->next
)
14597 c
= gfc_find_component (derived
, param
->name
, false, true, NULL
);
14599 if (c
->attr
.pdt_kind
)
14602 if (param
->expr
&& !gfc_is_constant_expr (param
->expr
)
14603 && c
->attr
.pdt_len
)
14604 const_len_exprs
= false;
14605 else if (param
->spec_type
== SPEC_ASSUMED
)
14606 assumed_len_exprs
= true;
14608 if (param
->spec_type
== SPEC_DEFERRED
14609 && !attr
->allocatable
&& !attr
->pointer
)
14610 gfc_error ("The object %qs at %L has a deferred LEN "
14611 "parameter %qs and is neither allocatable "
14612 "nor a pointer", sym
->name
, &sym
->declared_at
,
14617 if (!const_len_exprs
14618 && (sym
->ns
->proc_name
->attr
.is_main_program
14619 || sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
14620 || sym
->attr
.save
!= SAVE_NONE
))
14621 gfc_error ("The AUTOMATIC object %qs at %L must not have the "
14622 "SAVE attribute or be a variable declared in the "
14623 "main program, a module or a submodule(F08/C513)",
14624 sym
->name
, &sym
->declared_at
);
14626 if (assumed_len_exprs
&& !(sym
->attr
.dummy
14627 || sym
->attr
.select_type_temporary
|| sym
->attr
.associate_var
))
14628 gfc_error ("The object %qs at %L with ASSUMED type parameters "
14629 "must be a dummy or a SELECT TYPE selector(F08/4.2)",
14630 sym
->name
, &sym
->declared_at
);
14634 /* Do anything necessary to resolve a symbol. Right now, we just
14635 assume that an otherwise unknown symbol is a variable. This sort
14636 of thing commonly happens for symbols in module. */
14639 resolve_symbol (gfc_symbol
*sym
)
14641 int check_constant
, mp_flag
;
14642 gfc_symtree
*symtree
;
14643 gfc_symtree
*this_symtree
;
14646 symbol_attribute class_attr
;
14647 gfc_array_spec
*as
;
14648 bool saved_specification_expr
;
14654 /* No symbol will ever have union type; only components can be unions.
14655 Union type declaration symbols have type BT_UNKNOWN but flavor FL_UNION
14656 (just like derived type declaration symbols have flavor FL_DERIVED). */
14657 gcc_assert (sym
->ts
.type
!= BT_UNION
);
14659 /* Coarrayed polymorphic objects with allocatable or pointer components are
14660 yet unsupported for -fcoarray=lib. */
14661 if (flag_coarray
== GFC_FCOARRAY_LIB
&& sym
->ts
.type
== BT_CLASS
14662 && sym
->ts
.u
.derived
&& CLASS_DATA (sym
)
14663 && CLASS_DATA (sym
)->attr
.codimension
14664 && (CLASS_DATA (sym
)->ts
.u
.derived
->attr
.alloc_comp
14665 || CLASS_DATA (sym
)->ts
.u
.derived
->attr
.pointer_comp
))
14667 gfc_error ("Sorry, allocatable/pointer components in polymorphic (CLASS) "
14668 "type coarrays at %L are unsupported", &sym
->declared_at
);
14672 if (sym
->attr
.artificial
)
14675 if (sym
->attr
.unlimited_polymorphic
)
14678 if (sym
->attr
.flavor
== FL_UNKNOWN
14679 || (sym
->attr
.flavor
== FL_PROCEDURE
&& !sym
->attr
.intrinsic
14680 && !sym
->attr
.generic
&& !sym
->attr
.external
14681 && sym
->attr
.if_source
== IFSRC_UNKNOWN
14682 && sym
->ts
.type
== BT_UNKNOWN
))
14685 /* If we find that a flavorless symbol is an interface in one of the
14686 parent namespaces, find its symtree in this namespace, free the
14687 symbol and set the symtree to point to the interface symbol. */
14688 for (ns
= gfc_current_ns
->parent
; ns
; ns
= ns
->parent
)
14690 symtree
= gfc_find_symtree (ns
->sym_root
, sym
->name
);
14691 if (symtree
&& (symtree
->n
.sym
->generic
||
14692 (symtree
->n
.sym
->attr
.flavor
== FL_PROCEDURE
14693 && sym
->ns
->construct_entities
)))
14695 this_symtree
= gfc_find_symtree (gfc_current_ns
->sym_root
,
14697 if (this_symtree
->n
.sym
== sym
)
14699 symtree
->n
.sym
->refs
++;
14700 gfc_release_symbol (sym
);
14701 this_symtree
->n
.sym
= symtree
->n
.sym
;
14707 /* Otherwise give it a flavor according to such attributes as
14709 if (sym
->attr
.flavor
== FL_UNKNOWN
&& sym
->attr
.external
== 0
14710 && sym
->attr
.intrinsic
== 0)
14711 sym
->attr
.flavor
= FL_VARIABLE
;
14712 else if (sym
->attr
.flavor
== FL_UNKNOWN
)
14714 sym
->attr
.flavor
= FL_PROCEDURE
;
14715 if (sym
->attr
.dimension
)
14716 sym
->attr
.function
= 1;
14720 if (sym
->attr
.external
&& sym
->ts
.type
!= BT_UNKNOWN
&& !sym
->attr
.function
)
14721 gfc_add_function (&sym
->attr
, sym
->name
, &sym
->declared_at
);
14723 if (sym
->attr
.procedure
&& sym
->attr
.if_source
!= IFSRC_DECL
14724 && !resolve_procedure_interface (sym
))
14727 if (sym
->attr
.is_protected
&& !sym
->attr
.proc_pointer
14728 && (sym
->attr
.procedure
|| sym
->attr
.external
))
14730 if (sym
->attr
.external
)
14731 gfc_error ("PROTECTED attribute conflicts with EXTERNAL attribute "
14732 "at %L", &sym
->declared_at
);
14734 gfc_error ("PROCEDURE attribute conflicts with PROTECTED attribute "
14735 "at %L", &sym
->declared_at
);
14740 if (sym
->attr
.flavor
== FL_DERIVED
&& !resolve_fl_derived (sym
))
14743 else if ((sym
->attr
.flavor
== FL_STRUCT
|| sym
->attr
.flavor
== FL_UNION
)
14744 && !resolve_fl_struct (sym
))
14747 /* Symbols that are module procedures with results (functions) have
14748 the types and array specification copied for type checking in
14749 procedures that call them, as well as for saving to a module
14750 file. These symbols can't stand the scrutiny that their results
14752 mp_flag
= (sym
->result
!= NULL
&& sym
->result
!= sym
);
14754 /* Make sure that the intrinsic is consistent with its internal
14755 representation. This needs to be done before assigning a default
14756 type to avoid spurious warnings. */
14757 if (sym
->attr
.flavor
!= FL_MODULE
&& sym
->attr
.intrinsic
14758 && !gfc_resolve_intrinsic (sym
, &sym
->declared_at
))
14761 /* Resolve associate names. */
14763 resolve_assoc_var (sym
, true);
14765 /* Assign default type to symbols that need one and don't have one. */
14766 if (sym
->ts
.type
== BT_UNKNOWN
)
14768 if (sym
->attr
.flavor
== FL_VARIABLE
|| sym
->attr
.flavor
== FL_PARAMETER
)
14770 gfc_set_default_type (sym
, 1, NULL
);
14773 if (sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.external
14774 && !sym
->attr
.function
&& !sym
->attr
.subroutine
14775 && gfc_get_default_type (sym
->name
, sym
->ns
)->type
== BT_UNKNOWN
)
14776 gfc_add_subroutine (&sym
->attr
, sym
->name
, &sym
->declared_at
);
14778 if (sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.function
)
14780 /* The specific case of an external procedure should emit an error
14781 in the case that there is no implicit type. */
14784 if (!sym
->attr
.mixed_entry_master
)
14785 gfc_set_default_type (sym
, sym
->attr
.external
, NULL
);
14789 /* Result may be in another namespace. */
14790 resolve_symbol (sym
->result
);
14792 if (!sym
->result
->attr
.proc_pointer
)
14794 sym
->ts
= sym
->result
->ts
;
14795 sym
->as
= gfc_copy_array_spec (sym
->result
->as
);
14796 sym
->attr
.dimension
= sym
->result
->attr
.dimension
;
14797 sym
->attr
.pointer
= sym
->result
->attr
.pointer
;
14798 sym
->attr
.allocatable
= sym
->result
->attr
.allocatable
;
14799 sym
->attr
.contiguous
= sym
->result
->attr
.contiguous
;
14804 else if (mp_flag
&& sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.function
)
14806 bool saved_specification_expr
= specification_expr
;
14807 specification_expr
= true;
14808 gfc_resolve_array_spec (sym
->result
->as
, false);
14809 specification_expr
= saved_specification_expr
;
14812 if (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
)
14814 as
= CLASS_DATA (sym
)->as
;
14815 class_attr
= CLASS_DATA (sym
)->attr
;
14816 class_attr
.pointer
= class_attr
.class_pointer
;
14820 class_attr
= sym
->attr
;
14825 if (sym
->attr
.contiguous
14826 && (!class_attr
.dimension
14827 || (as
->type
!= AS_ASSUMED_SHAPE
&& as
->type
!= AS_ASSUMED_RANK
14828 && !class_attr
.pointer
)))
14830 gfc_error ("%qs at %L has the CONTIGUOUS attribute but is not an "
14831 "array pointer or an assumed-shape or assumed-rank array",
14832 sym
->name
, &sym
->declared_at
);
14836 /* Assumed size arrays and assumed shape arrays must be dummy
14837 arguments. Array-spec's of implied-shape should have been resolved to
14838 AS_EXPLICIT already. */
14842 /* If AS_IMPLIED_SHAPE makes it to here, it must be a bad
14843 specification expression. */
14844 if (as
->type
== AS_IMPLIED_SHAPE
)
14847 for (i
=0; i
<as
->rank
; i
++)
14849 if (as
->lower
[i
] != NULL
&& as
->upper
[i
] == NULL
)
14851 gfc_error ("Bad specification for assumed size array at %L",
14852 &as
->lower
[i
]->where
);
14859 if (((as
->type
== AS_ASSUMED_SIZE
&& !as
->cp_was_assumed
)
14860 || as
->type
== AS_ASSUMED_SHAPE
)
14861 && !sym
->attr
.dummy
&& !sym
->attr
.select_type_temporary
)
14863 if (as
->type
== AS_ASSUMED_SIZE
)
14864 gfc_error ("Assumed size array at %L must be a dummy argument",
14865 &sym
->declared_at
);
14867 gfc_error ("Assumed shape array at %L must be a dummy argument",
14868 &sym
->declared_at
);
14871 /* TS 29113, C535a. */
14872 if (as
->type
== AS_ASSUMED_RANK
&& !sym
->attr
.dummy
14873 && !sym
->attr
.select_type_temporary
)
14875 gfc_error ("Assumed-rank array at %L must be a dummy argument",
14876 &sym
->declared_at
);
14879 if (as
->type
== AS_ASSUMED_RANK
14880 && (sym
->attr
.codimension
|| sym
->attr
.value
))
14882 gfc_error ("Assumed-rank array at %L may not have the VALUE or "
14883 "CODIMENSION attribute", &sym
->declared_at
);
14888 /* Make sure symbols with known intent or optional are really dummy
14889 variable. Because of ENTRY statement, this has to be deferred
14890 until resolution time. */
14892 if (!sym
->attr
.dummy
14893 && (sym
->attr
.optional
|| sym
->attr
.intent
!= INTENT_UNKNOWN
))
14895 gfc_error ("Symbol at %L is not a DUMMY variable", &sym
->declared_at
);
14899 if (sym
->attr
.value
&& !sym
->attr
.dummy
)
14901 gfc_error ("%qs at %L cannot have the VALUE attribute because "
14902 "it is not a dummy argument", sym
->name
, &sym
->declared_at
);
14906 if (sym
->attr
.value
&& sym
->ts
.type
== BT_CHARACTER
)
14908 gfc_charlen
*cl
= sym
->ts
.u
.cl
;
14909 if (!cl
|| !cl
->length
|| cl
->length
->expr_type
!= EXPR_CONSTANT
)
14911 gfc_error ("Character dummy variable %qs at %L with VALUE "
14912 "attribute must have constant length",
14913 sym
->name
, &sym
->declared_at
);
14917 if (sym
->ts
.is_c_interop
14918 && mpz_cmp_si (cl
->length
->value
.integer
, 1) != 0)
14920 gfc_error ("C interoperable character dummy variable %qs at %L "
14921 "with VALUE attribute must have length one",
14922 sym
->name
, &sym
->declared_at
);
14927 if (sym
->ts
.type
== BT_DERIVED
&& !sym
->attr
.is_iso_c
14928 && sym
->ts
.u
.derived
->attr
.generic
)
14930 sym
->ts
.u
.derived
= gfc_find_dt_in_generic (sym
->ts
.u
.derived
);
14931 if (!sym
->ts
.u
.derived
)
14933 gfc_error ("The derived type %qs at %L is of type %qs, "
14934 "which has not been defined", sym
->name
,
14935 &sym
->declared_at
, sym
->ts
.u
.derived
->name
);
14936 sym
->ts
.type
= BT_UNKNOWN
;
14941 /* Use the same constraints as TYPE(*), except for the type check
14942 and that only scalars and assumed-size arrays are permitted. */
14943 if (sym
->attr
.ext_attr
& (1 << EXT_ATTR_NO_ARG_CHECK
))
14945 if (!sym
->attr
.dummy
)
14947 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute shall be "
14948 "a dummy argument", sym
->name
, &sym
->declared_at
);
14952 if (sym
->ts
.type
!= BT_ASSUMED
&& sym
->ts
.type
!= BT_INTEGER
14953 && sym
->ts
.type
!= BT_REAL
&& sym
->ts
.type
!= BT_LOGICAL
14954 && sym
->ts
.type
!= BT_COMPLEX
)
14956 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute shall be "
14957 "of type TYPE(*) or of an numeric intrinsic type",
14958 sym
->name
, &sym
->declared_at
);
14962 if (sym
->attr
.allocatable
|| sym
->attr
.codimension
14963 || sym
->attr
.pointer
|| sym
->attr
.value
)
14965 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute may not "
14966 "have the ALLOCATABLE, CODIMENSION, POINTER or VALUE "
14967 "attribute", sym
->name
, &sym
->declared_at
);
14971 if (sym
->attr
.intent
== INTENT_OUT
)
14973 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute may not "
14974 "have the INTENT(OUT) attribute",
14975 sym
->name
, &sym
->declared_at
);
14978 if (sym
->attr
.dimension
&& sym
->as
->type
!= AS_ASSUMED_SIZE
)
14980 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute shall "
14981 "either be a scalar or an assumed-size array",
14982 sym
->name
, &sym
->declared_at
);
14986 /* Set the type to TYPE(*) and add a dimension(*) to ensure
14987 NO_ARG_CHECK is correctly handled in trans*.c, e.g. with
14989 sym
->ts
.type
= BT_ASSUMED
;
14990 sym
->as
= gfc_get_array_spec ();
14991 sym
->as
->type
= AS_ASSUMED_SIZE
;
14993 sym
->as
->lower
[0] = gfc_get_int_expr (gfc_default_integer_kind
, NULL
, 1);
14995 else if (sym
->ts
.type
== BT_ASSUMED
)
14997 /* TS 29113, C407a. */
14998 if (!sym
->attr
.dummy
)
15000 gfc_error ("Assumed type of variable %s at %L is only permitted "
15001 "for dummy variables", sym
->name
, &sym
->declared_at
);
15004 if (sym
->attr
.allocatable
|| sym
->attr
.codimension
15005 || sym
->attr
.pointer
|| sym
->attr
.value
)
15007 gfc_error ("Assumed-type variable %s at %L may not have the "
15008 "ALLOCATABLE, CODIMENSION, POINTER or VALUE attribute",
15009 sym
->name
, &sym
->declared_at
);
15012 if (sym
->attr
.intent
== INTENT_OUT
)
15014 gfc_error ("Assumed-type variable %s at %L may not have the "
15015 "INTENT(OUT) attribute",
15016 sym
->name
, &sym
->declared_at
);
15019 if (sym
->attr
.dimension
&& sym
->as
->type
== AS_EXPLICIT
)
15021 gfc_error ("Assumed-type variable %s at %L shall not be an "
15022 "explicit-shape array", sym
->name
, &sym
->declared_at
);
15027 /* If the symbol is marked as bind(c), that it is declared at module level
15028 scope and verify its type and kind. Do not do the latter for symbols
15029 that are implicitly typed because that is handled in
15030 gfc_set_default_type. Handle dummy arguments and procedure definitions
15031 separately. Also, anything that is use associated is not handled here
15032 but instead is handled in the module it is declared in. Finally, derived
15033 type definitions are allowed to be BIND(C) since that only implies that
15034 they're interoperable, and they are checked fully for interoperability
15035 when a variable is declared of that type. */
15036 if (sym
->attr
.is_bind_c
&& sym
->attr
.use_assoc
== 0
15037 && sym
->attr
.dummy
== 0 && sym
->attr
.flavor
!= FL_PROCEDURE
15038 && sym
->attr
.flavor
!= FL_DERIVED
)
15042 /* First, make sure the variable is declared at the
15043 module-level scope (J3/04-007, Section 15.3). */
15044 if (sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
&&
15045 sym
->attr
.in_common
== 0)
15047 gfc_error ("Variable %qs at %L cannot be BIND(C) because it "
15048 "is neither a COMMON block nor declared at the "
15049 "module level scope", sym
->name
, &(sym
->declared_at
));
15052 else if (sym
->ts
.type
== BT_CHARACTER
15053 && (sym
->ts
.u
.cl
== NULL
|| sym
->ts
.u
.cl
->length
== NULL
15054 || !gfc_is_constant_expr (sym
->ts
.u
.cl
->length
)
15055 || mpz_cmp_si (sym
->ts
.u
.cl
->length
->value
.integer
, 1) != 0))
15057 gfc_error ("BIND(C) Variable %qs at %L must have length one",
15058 sym
->name
, &sym
->declared_at
);
15061 else if (sym
->common_head
!= NULL
&& sym
->attr
.implicit_type
== 0)
15063 t
= verify_com_block_vars_c_interop (sym
->common_head
);
15065 else if (sym
->attr
.implicit_type
== 0)
15067 /* If type() declaration, we need to verify that the components
15068 of the given type are all C interoperable, etc. */
15069 if (sym
->ts
.type
== BT_DERIVED
&&
15070 sym
->ts
.u
.derived
->attr
.is_c_interop
!= 1)
15072 /* Make sure the user marked the derived type as BIND(C). If
15073 not, call the verify routine. This could print an error
15074 for the derived type more than once if multiple variables
15075 of that type are declared. */
15076 if (sym
->ts
.u
.derived
->attr
.is_bind_c
!= 1)
15077 verify_bind_c_derived_type (sym
->ts
.u
.derived
);
15081 /* Verify the variable itself as C interoperable if it
15082 is BIND(C). It is not possible for this to succeed if
15083 the verify_bind_c_derived_type failed, so don't have to handle
15084 any error returned by verify_bind_c_derived_type. */
15085 t
= verify_bind_c_sym (sym
, &(sym
->ts
), sym
->attr
.in_common
,
15086 sym
->common_block
);
15091 /* clear the is_bind_c flag to prevent reporting errors more than
15092 once if something failed. */
15093 sym
->attr
.is_bind_c
= 0;
15098 /* If a derived type symbol has reached this point, without its
15099 type being declared, we have an error. Notice that most
15100 conditions that produce undefined derived types have already
15101 been dealt with. However, the likes of:
15102 implicit type(t) (t) ..... call foo (t) will get us here if
15103 the type is not declared in the scope of the implicit
15104 statement. Change the type to BT_UNKNOWN, both because it is so
15105 and to prevent an ICE. */
15106 if (sym
->ts
.type
== BT_DERIVED
&& !sym
->attr
.is_iso_c
15107 && sym
->ts
.u
.derived
->components
== NULL
15108 && !sym
->ts
.u
.derived
->attr
.zero_comp
)
15110 gfc_error ("The derived type %qs at %L is of type %qs, "
15111 "which has not been defined", sym
->name
,
15112 &sym
->declared_at
, sym
->ts
.u
.derived
->name
);
15113 sym
->ts
.type
= BT_UNKNOWN
;
15117 /* Make sure that the derived type has been resolved and that the
15118 derived type is visible in the symbol's namespace, if it is a
15119 module function and is not PRIVATE. */
15120 if (sym
->ts
.type
== BT_DERIVED
15121 && sym
->ts
.u
.derived
->attr
.use_assoc
15122 && sym
->ns
->proc_name
15123 && sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
15124 && !resolve_fl_derived (sym
->ts
.u
.derived
))
15127 /* Unless the derived-type declaration is use associated, Fortran 95
15128 does not allow public entries of private derived types.
15129 See 4.4.1 (F95) and 4.5.1.1 (F2003); and related interpretation
15130 161 in 95-006r3. */
15131 if (sym
->ts
.type
== BT_DERIVED
15132 && sym
->ns
->proc_name
&& sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
15133 && !sym
->ts
.u
.derived
->attr
.use_assoc
15134 && gfc_check_symbol_access (sym
)
15135 && !gfc_check_symbol_access (sym
->ts
.u
.derived
)
15136 && !gfc_notify_std (GFC_STD_F2003
, "PUBLIC %s %qs at %L of PRIVATE "
15137 "derived type %qs",
15138 (sym
->attr
.flavor
== FL_PARAMETER
)
15139 ? "parameter" : "variable",
15140 sym
->name
, &sym
->declared_at
,
15141 sym
->ts
.u
.derived
->name
))
15144 /* F2008, C1302. */
15145 if (sym
->ts
.type
== BT_DERIVED
15146 && ((sym
->ts
.u
.derived
->from_intmod
== INTMOD_ISO_FORTRAN_ENV
15147 && sym
->ts
.u
.derived
->intmod_sym_id
== ISOFORTRAN_LOCK_TYPE
)
15148 || sym
->ts
.u
.derived
->attr
.lock_comp
)
15149 && !sym
->attr
.codimension
&& !sym
->ts
.u
.derived
->attr
.coarray_comp
)
15151 gfc_error ("Variable %s at %L of type LOCK_TYPE or with subcomponent of "
15152 "type LOCK_TYPE must be a coarray", sym
->name
,
15153 &sym
->declared_at
);
15157 /* TS18508, C702/C703. */
15158 if (sym
->ts
.type
== BT_DERIVED
15159 && ((sym
->ts
.u
.derived
->from_intmod
== INTMOD_ISO_FORTRAN_ENV
15160 && sym
->ts
.u
.derived
->intmod_sym_id
== ISOFORTRAN_EVENT_TYPE
)
15161 || sym
->ts
.u
.derived
->attr
.event_comp
)
15162 && !sym
->attr
.codimension
&& !sym
->ts
.u
.derived
->attr
.coarray_comp
)
15164 gfc_error ("Variable %s at %L of type EVENT_TYPE or with subcomponent of "
15165 "type EVENT_TYPE must be a coarray", sym
->name
,
15166 &sym
->declared_at
);
15170 /* An assumed-size array with INTENT(OUT) shall not be of a type for which
15171 default initialization is defined (5.1.2.4.4). */
15172 if (sym
->ts
.type
== BT_DERIVED
15174 && sym
->attr
.intent
== INTENT_OUT
15176 && sym
->as
->type
== AS_ASSUMED_SIZE
)
15178 for (c
= sym
->ts
.u
.derived
->components
; c
; c
= c
->next
)
15180 if (c
->initializer
)
15182 gfc_error ("The INTENT(OUT) dummy argument %qs at %L is "
15183 "ASSUMED SIZE and so cannot have a default initializer",
15184 sym
->name
, &sym
->declared_at
);
15191 if (sym
->ts
.type
== BT_DERIVED
&& sym
->attr
.dummy
15192 && sym
->attr
.intent
== INTENT_OUT
&& sym
->attr
.lock_comp
)
15194 gfc_error ("Dummy argument %qs at %L of LOCK_TYPE shall not be "
15195 "INTENT(OUT)", sym
->name
, &sym
->declared_at
);
15200 if (sym
->ts
.type
== BT_DERIVED
&& sym
->attr
.dummy
15201 && sym
->attr
.intent
== INTENT_OUT
&& sym
->attr
.event_comp
)
15203 gfc_error ("Dummy argument %qs at %L of EVENT_TYPE shall not be "
15204 "INTENT(OUT)", sym
->name
, &sym
->declared_at
);
15209 if ((((sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
->attr
.coarray_comp
)
15210 || (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
15211 && CLASS_DATA (sym
)->attr
.coarray_comp
))
15212 || class_attr
.codimension
)
15213 && (sym
->attr
.result
|| sym
->result
== sym
))
15215 gfc_error ("Function result %qs at %L shall not be a coarray or have "
15216 "a coarray component", sym
->name
, &sym
->declared_at
);
15221 if (sym
->attr
.codimension
&& sym
->ts
.type
== BT_DERIVED
15222 && sym
->ts
.u
.derived
->ts
.is_iso_c
)
15224 gfc_error ("Variable %qs at %L of TYPE(C_PTR) or TYPE(C_FUNPTR) "
15225 "shall not be a coarray", sym
->name
, &sym
->declared_at
);
15230 if (((sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
->attr
.coarray_comp
)
15231 || (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
15232 && CLASS_DATA (sym
)->attr
.coarray_comp
))
15233 && (class_attr
.codimension
|| class_attr
.pointer
|| class_attr
.dimension
15234 || class_attr
.allocatable
))
15236 gfc_error ("Variable %qs at %L with coarray component shall be a "
15237 "nonpointer, nonallocatable scalar, which is not a coarray",
15238 sym
->name
, &sym
->declared_at
);
15242 /* F2008, C526. The function-result case was handled above. */
15243 if (class_attr
.codimension
15244 && !(class_attr
.allocatable
|| sym
->attr
.dummy
|| sym
->attr
.save
15245 || sym
->attr
.select_type_temporary
15246 || sym
->attr
.associate_var
15247 || (sym
->ns
->save_all
&& !sym
->attr
.automatic
)
15248 || sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
15249 || sym
->ns
->proc_name
->attr
.is_main_program
15250 || sym
->attr
.function
|| sym
->attr
.result
|| sym
->attr
.use_assoc
))
15252 gfc_error ("Variable %qs at %L is a coarray and is not ALLOCATABLE, SAVE "
15253 "nor a dummy argument", sym
->name
, &sym
->declared_at
);
15257 else if (class_attr
.codimension
&& !sym
->attr
.select_type_temporary
15258 && !class_attr
.allocatable
&& as
&& as
->cotype
== AS_DEFERRED
)
15260 gfc_error ("Coarray variable %qs at %L shall not have codimensions with "
15261 "deferred shape", sym
->name
, &sym
->declared_at
);
15264 else if (class_attr
.codimension
&& class_attr
.allocatable
&& as
15265 && (as
->cotype
!= AS_DEFERRED
|| as
->type
!= AS_DEFERRED
))
15267 gfc_error ("Allocatable coarray variable %qs at %L must have "
15268 "deferred shape", sym
->name
, &sym
->declared_at
);
15273 if ((((sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
->attr
.coarray_comp
)
15274 || (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
15275 && CLASS_DATA (sym
)->attr
.coarray_comp
))
15276 || (class_attr
.codimension
&& class_attr
.allocatable
))
15277 && sym
->attr
.dummy
&& sym
->attr
.intent
== INTENT_OUT
)
15279 gfc_error ("Variable %qs at %L is INTENT(OUT) and can thus not be an "
15280 "allocatable coarray or have coarray components",
15281 sym
->name
, &sym
->declared_at
);
15285 if (class_attr
.codimension
&& sym
->attr
.dummy
15286 && sym
->ns
->proc_name
&& sym
->ns
->proc_name
->attr
.is_bind_c
)
15288 gfc_error ("Coarray dummy variable %qs at %L not allowed in BIND(C) "
15289 "procedure %qs", sym
->name
, &sym
->declared_at
,
15290 sym
->ns
->proc_name
->name
);
15294 if (sym
->ts
.type
== BT_LOGICAL
15295 && ((sym
->attr
.function
&& sym
->attr
.is_bind_c
&& sym
->result
== sym
)
15296 || ((sym
->attr
.dummy
|| sym
->attr
.result
) && sym
->ns
->proc_name
15297 && sym
->ns
->proc_name
->attr
.is_bind_c
)))
15300 for (i
= 0; gfc_logical_kinds
[i
].kind
; i
++)
15301 if (gfc_logical_kinds
[i
].kind
== sym
->ts
.kind
)
15303 if (!gfc_logical_kinds
[i
].c_bool
&& sym
->attr
.dummy
15304 && !gfc_notify_std (GFC_STD_GNU
, "LOGICAL dummy argument %qs at "
15305 "%L with non-C_Bool kind in BIND(C) procedure "
15306 "%qs", sym
->name
, &sym
->declared_at
,
15307 sym
->ns
->proc_name
->name
))
15309 else if (!gfc_logical_kinds
[i
].c_bool
15310 && !gfc_notify_std (GFC_STD_GNU
, "LOGICAL result variable "
15311 "%qs at %L with non-C_Bool kind in "
15312 "BIND(C) procedure %qs", sym
->name
,
15314 sym
->attr
.function
? sym
->name
15315 : sym
->ns
->proc_name
->name
))
15319 switch (sym
->attr
.flavor
)
15322 if (!resolve_fl_variable (sym
, mp_flag
))
15327 if (sym
->formal
&& !sym
->formal_ns
)
15329 /* Check that none of the arguments are a namelist. */
15330 gfc_formal_arglist
*formal
= sym
->formal
;
15332 for (; formal
; formal
= formal
->next
)
15333 if (formal
->sym
&& formal
->sym
->attr
.flavor
== FL_NAMELIST
)
15335 gfc_error ("Namelist %qs cannot be an argument to "
15336 "subroutine or function at %L",
15337 formal
->sym
->name
, &sym
->declared_at
);
15342 if (!resolve_fl_procedure (sym
, mp_flag
))
15347 if (!resolve_fl_namelist (sym
))
15352 if (!resolve_fl_parameter (sym
))
15360 /* Resolve array specifier. Check as well some constraints
15361 on COMMON blocks. */
15363 check_constant
= sym
->attr
.in_common
&& !sym
->attr
.pointer
;
15365 /* Set the formal_arg_flag so that check_conflict will not throw
15366 an error for host associated variables in the specification
15367 expression for an array_valued function. */
15368 if ((sym
->attr
.function
|| sym
->attr
.result
) && sym
->as
)
15369 formal_arg_flag
= true;
15371 saved_specification_expr
= specification_expr
;
15372 specification_expr
= true;
15373 gfc_resolve_array_spec (sym
->as
, check_constant
);
15374 specification_expr
= saved_specification_expr
;
15376 formal_arg_flag
= false;
15378 /* Resolve formal namespaces. */
15379 if (sym
->formal_ns
&& sym
->formal_ns
!= gfc_current_ns
15380 && !sym
->attr
.contained
&& !sym
->attr
.intrinsic
)
15381 gfc_resolve (sym
->formal_ns
);
15383 /* Make sure the formal namespace is present. */
15384 if (sym
->formal
&& !sym
->formal_ns
)
15386 gfc_formal_arglist
*formal
= sym
->formal
;
15387 while (formal
&& !formal
->sym
)
15388 formal
= formal
->next
;
15392 sym
->formal_ns
= formal
->sym
->ns
;
15393 if (sym
->ns
!= formal
->sym
->ns
)
15394 sym
->formal_ns
->refs
++;
15398 /* Check threadprivate restrictions. */
15399 if (sym
->attr
.threadprivate
&& !sym
->attr
.save
15400 && !(sym
->ns
->save_all
&& !sym
->attr
.automatic
)
15401 && (!sym
->attr
.in_common
15402 && sym
->module
== NULL
15403 && (sym
->ns
->proc_name
== NULL
15404 || sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
)))
15405 gfc_error ("Threadprivate at %L isn't SAVEd", &sym
->declared_at
);
15407 /* Check omp declare target restrictions. */
15408 if (sym
->attr
.omp_declare_target
15409 && sym
->attr
.flavor
== FL_VARIABLE
15411 && !(sym
->ns
->save_all
&& !sym
->attr
.automatic
)
15412 && (!sym
->attr
.in_common
15413 && sym
->module
== NULL
15414 && (sym
->ns
->proc_name
== NULL
15415 || sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
)))
15416 gfc_error ("!$OMP DECLARE TARGET variable %qs at %L isn't SAVEd",
15417 sym
->name
, &sym
->declared_at
);
15419 /* If we have come this far we can apply default-initializers, as
15420 described in 14.7.5, to those variables that have not already
15421 been assigned one. */
15422 if (sym
->ts
.type
== BT_DERIVED
15424 && !sym
->attr
.allocatable
15425 && !sym
->attr
.alloc_comp
)
15427 symbol_attribute
*a
= &sym
->attr
;
15429 if ((!a
->save
&& !a
->dummy
&& !a
->pointer
15430 && !a
->in_common
&& !a
->use_assoc
15432 && !((a
->function
|| a
->result
)
15434 || sym
->ts
.u
.derived
->attr
.alloc_comp
15435 || sym
->ts
.u
.derived
->attr
.pointer_comp
))
15436 && !(a
->function
&& sym
!= sym
->result
))
15437 || (a
->dummy
&& a
->intent
== INTENT_OUT
&& !a
->pointer
))
15438 apply_default_init (sym
);
15439 else if (a
->function
&& sym
->result
&& a
->access
!= ACCESS_PRIVATE
15440 && (sym
->ts
.u
.derived
->attr
.alloc_comp
15441 || sym
->ts
.u
.derived
->attr
.pointer_comp
))
15442 /* Mark the result symbol to be referenced, when it has allocatable
15444 sym
->result
->attr
.referenced
= 1;
15447 if (sym
->ts
.type
== BT_CLASS
&& sym
->ns
== gfc_current_ns
15448 && sym
->attr
.dummy
&& sym
->attr
.intent
== INTENT_OUT
15449 && !CLASS_DATA (sym
)->attr
.class_pointer
15450 && !CLASS_DATA (sym
)->attr
.allocatable
)
15451 apply_default_init (sym
);
15453 /* If this symbol has a type-spec, check it. */
15454 if (sym
->attr
.flavor
== FL_VARIABLE
|| sym
->attr
.flavor
== FL_PARAMETER
15455 || (sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.function
))
15456 if (!resolve_typespec_used (&sym
->ts
, &sym
->declared_at
, sym
->name
))
15459 if (sym
->param_list
)
15464 /************* Resolve DATA statements *************/
15468 gfc_data_value
*vnode
;
15474 /* Advance the values structure to point to the next value in the data list. */
15477 next_data_value (void)
15479 while (mpz_cmp_ui (values
.left
, 0) == 0)
15482 if (values
.vnode
->next
== NULL
)
15485 values
.vnode
= values
.vnode
->next
;
15486 mpz_set (values
.left
, values
.vnode
->repeat
);
15494 check_data_variable (gfc_data_variable
*var
, locus
*where
)
15500 ar_type mark
= AR_UNKNOWN
;
15502 mpz_t section_index
[GFC_MAX_DIMENSIONS
];
15508 if (!gfc_resolve_expr (var
->expr
))
15512 mpz_init_set_si (offset
, 0);
15515 if (e
->expr_type
== EXPR_FUNCTION
&& e
->value
.function
.isym
15516 && e
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
)
15517 e
= e
->value
.function
.actual
->expr
;
15519 if (e
->expr_type
!= EXPR_VARIABLE
)
15521 gfc_error ("Expecting definable entity near %L", where
);
15525 sym
= e
->symtree
->n
.sym
;
15527 if (sym
->ns
->is_block_data
&& !sym
->attr
.in_common
)
15529 gfc_error ("BLOCK DATA element %qs at %L must be in COMMON",
15530 sym
->name
, &sym
->declared_at
);
15534 if (e
->ref
== NULL
&& sym
->as
)
15536 gfc_error ("DATA array %qs at %L must be specified in a previous"
15537 " declaration", sym
->name
, where
);
15541 has_pointer
= sym
->attr
.pointer
;
15543 if (gfc_is_coindexed (e
))
15545 gfc_error ("DATA element %qs at %L cannot have a coindex", sym
->name
,
15550 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
15552 if (ref
->type
== REF_COMPONENT
&& ref
->u
.c
.component
->attr
.pointer
)
15556 && ref
->type
== REF_ARRAY
15557 && ref
->u
.ar
.type
!= AR_FULL
)
15559 gfc_error ("DATA element %qs at %L is a pointer and so must "
15560 "be a full array", sym
->name
, where
);
15565 if (e
->rank
== 0 || has_pointer
)
15567 mpz_init_set_ui (size
, 1);
15574 /* Find the array section reference. */
15575 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
15577 if (ref
->type
!= REF_ARRAY
)
15579 if (ref
->u
.ar
.type
== AR_ELEMENT
)
15585 /* Set marks according to the reference pattern. */
15586 switch (ref
->u
.ar
.type
)
15594 /* Get the start position of array section. */
15595 gfc_get_section_index (ar
, section_index
, &offset
);
15600 gcc_unreachable ();
15603 if (!gfc_array_size (e
, &size
))
15605 gfc_error ("Nonconstant array section at %L in DATA statement",
15607 mpz_clear (offset
);
15614 while (mpz_cmp_ui (size
, 0) > 0)
15616 if (!next_data_value ())
15618 gfc_error ("DATA statement at %L has more variables than values",
15624 t
= gfc_check_assign (var
->expr
, values
.vnode
->expr
, 0);
15628 /* If we have more than one element left in the repeat count,
15629 and we have more than one element left in the target variable,
15630 then create a range assignment. */
15631 /* FIXME: Only done for full arrays for now, since array sections
15633 if (mark
== AR_FULL
&& ref
&& ref
->next
== NULL
15634 && mpz_cmp_ui (values
.left
, 1) > 0 && mpz_cmp_ui (size
, 1) > 0)
15638 if (mpz_cmp (size
, values
.left
) >= 0)
15640 mpz_init_set (range
, values
.left
);
15641 mpz_sub (size
, size
, values
.left
);
15642 mpz_set_ui (values
.left
, 0);
15646 mpz_init_set (range
, size
);
15647 mpz_sub (values
.left
, values
.left
, size
);
15648 mpz_set_ui (size
, 0);
15651 t
= gfc_assign_data_value (var
->expr
, values
.vnode
->expr
,
15654 mpz_add (offset
, offset
, range
);
15661 /* Assign initial value to symbol. */
15664 mpz_sub_ui (values
.left
, values
.left
, 1);
15665 mpz_sub_ui (size
, size
, 1);
15667 t
= gfc_assign_data_value (var
->expr
, values
.vnode
->expr
,
15672 if (mark
== AR_FULL
)
15673 mpz_add_ui (offset
, offset
, 1);
15675 /* Modify the array section indexes and recalculate the offset
15676 for next element. */
15677 else if (mark
== AR_SECTION
)
15678 gfc_advance_section (section_index
, ar
, &offset
);
15682 if (mark
== AR_SECTION
)
15684 for (i
= 0; i
< ar
->dimen
; i
++)
15685 mpz_clear (section_index
[i
]);
15689 mpz_clear (offset
);
15695 static bool traverse_data_var (gfc_data_variable
*, locus
*);
15697 /* Iterate over a list of elements in a DATA statement. */
15700 traverse_data_list (gfc_data_variable
*var
, locus
*where
)
15703 iterator_stack frame
;
15704 gfc_expr
*e
, *start
, *end
, *step
;
15705 bool retval
= true;
15707 mpz_init (frame
.value
);
15710 start
= gfc_copy_expr (var
->iter
.start
);
15711 end
= gfc_copy_expr (var
->iter
.end
);
15712 step
= gfc_copy_expr (var
->iter
.step
);
15714 if (!gfc_simplify_expr (start
, 1)
15715 || start
->expr_type
!= EXPR_CONSTANT
)
15717 gfc_error ("start of implied-do loop at %L could not be "
15718 "simplified to a constant value", &start
->where
);
15722 if (!gfc_simplify_expr (end
, 1)
15723 || end
->expr_type
!= EXPR_CONSTANT
)
15725 gfc_error ("end of implied-do loop at %L could not be "
15726 "simplified to a constant value", &start
->where
);
15730 if (!gfc_simplify_expr (step
, 1)
15731 || step
->expr_type
!= EXPR_CONSTANT
)
15733 gfc_error ("step of implied-do loop at %L could not be "
15734 "simplified to a constant value", &start
->where
);
15739 mpz_set (trip
, end
->value
.integer
);
15740 mpz_sub (trip
, trip
, start
->value
.integer
);
15741 mpz_add (trip
, trip
, step
->value
.integer
);
15743 mpz_div (trip
, trip
, step
->value
.integer
);
15745 mpz_set (frame
.value
, start
->value
.integer
);
15747 frame
.prev
= iter_stack
;
15748 frame
.variable
= var
->iter
.var
->symtree
;
15749 iter_stack
= &frame
;
15751 while (mpz_cmp_ui (trip
, 0) > 0)
15753 if (!traverse_data_var (var
->list
, where
))
15759 e
= gfc_copy_expr (var
->expr
);
15760 if (!gfc_simplify_expr (e
, 1))
15767 mpz_add (frame
.value
, frame
.value
, step
->value
.integer
);
15769 mpz_sub_ui (trip
, trip
, 1);
15773 mpz_clear (frame
.value
);
15776 gfc_free_expr (start
);
15777 gfc_free_expr (end
);
15778 gfc_free_expr (step
);
15780 iter_stack
= frame
.prev
;
15785 /* Type resolve variables in the variable list of a DATA statement. */
15788 traverse_data_var (gfc_data_variable
*var
, locus
*where
)
15792 for (; var
; var
= var
->next
)
15794 if (var
->expr
== NULL
)
15795 t
= traverse_data_list (var
, where
);
15797 t
= check_data_variable (var
, where
);
15807 /* Resolve the expressions and iterators associated with a data statement.
15808 This is separate from the assignment checking because data lists should
15809 only be resolved once. */
15812 resolve_data_variables (gfc_data_variable
*d
)
15814 for (; d
; d
= d
->next
)
15816 if (d
->list
== NULL
)
15818 if (!gfc_resolve_expr (d
->expr
))
15823 if (!gfc_resolve_iterator (&d
->iter
, false, true))
15826 if (!resolve_data_variables (d
->list
))
15835 /* Resolve a single DATA statement. We implement this by storing a pointer to
15836 the value list into static variables, and then recursively traversing the
15837 variables list, expanding iterators and such. */
15840 resolve_data (gfc_data
*d
)
15843 if (!resolve_data_variables (d
->var
))
15846 values
.vnode
= d
->value
;
15847 if (d
->value
== NULL
)
15848 mpz_set_ui (values
.left
, 0);
15850 mpz_set (values
.left
, d
->value
->repeat
);
15852 if (!traverse_data_var (d
->var
, &d
->where
))
15855 /* At this point, we better not have any values left. */
15857 if (next_data_value ())
15858 gfc_error ("DATA statement at %L has more values than variables",
15863 /* 12.6 Constraint: In a pure subprogram any variable which is in common or
15864 accessed by host or use association, is a dummy argument to a pure function,
15865 is a dummy argument with INTENT (IN) to a pure subroutine, or an object that
15866 is storage associated with any such variable, shall not be used in the
15867 following contexts: (clients of this function). */
15869 /* Determines if a variable is not 'pure', i.e., not assignable within a pure
15870 procedure. Returns zero if assignment is OK, nonzero if there is a
15873 gfc_impure_variable (gfc_symbol
*sym
)
15878 if (sym
->attr
.use_assoc
|| sym
->attr
.in_common
)
15881 /* Check if the symbol's ns is inside the pure procedure. */
15882 for (ns
= gfc_current_ns
; ns
; ns
= ns
->parent
)
15886 if (ns
->proc_name
->attr
.flavor
== FL_PROCEDURE
&& !sym
->attr
.function
)
15890 proc
= sym
->ns
->proc_name
;
15891 if (sym
->attr
.dummy
15892 && ((proc
->attr
.subroutine
&& sym
->attr
.intent
== INTENT_IN
)
15893 || proc
->attr
.function
))
15896 /* TODO: Sort out what can be storage associated, if anything, and include
15897 it here. In principle equivalences should be scanned but it does not
15898 seem to be possible to storage associate an impure variable this way. */
15903 /* Test whether a symbol is pure or not. For a NULL pointer, checks if the
15904 current namespace is inside a pure procedure. */
15907 gfc_pure (gfc_symbol
*sym
)
15909 symbol_attribute attr
;
15914 /* Check if the current namespace or one of its parents
15915 belongs to a pure procedure. */
15916 for (ns
= gfc_current_ns
; ns
; ns
= ns
->parent
)
15918 sym
= ns
->proc_name
;
15922 if (attr
.flavor
== FL_PROCEDURE
&& attr
.pure
)
15930 return attr
.flavor
== FL_PROCEDURE
&& attr
.pure
;
15934 /* Test whether a symbol is implicitly pure or not. For a NULL pointer,
15935 checks if the current namespace is implicitly pure. Note that this
15936 function returns false for a PURE procedure. */
15939 gfc_implicit_pure (gfc_symbol
*sym
)
15945 /* Check if the current procedure is implicit_pure. Walk up
15946 the procedure list until we find a procedure. */
15947 for (ns
= gfc_current_ns
; ns
; ns
= ns
->parent
)
15949 sym
= ns
->proc_name
;
15953 if (sym
->attr
.flavor
== FL_PROCEDURE
)
15958 return sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.implicit_pure
15959 && !sym
->attr
.pure
;
15964 gfc_unset_implicit_pure (gfc_symbol
*sym
)
15970 /* Check if the current procedure is implicit_pure. Walk up
15971 the procedure list until we find a procedure. */
15972 for (ns
= gfc_current_ns
; ns
; ns
= ns
->parent
)
15974 sym
= ns
->proc_name
;
15978 if (sym
->attr
.flavor
== FL_PROCEDURE
)
15983 if (sym
->attr
.flavor
== FL_PROCEDURE
)
15984 sym
->attr
.implicit_pure
= 0;
15986 sym
->attr
.pure
= 0;
15990 /* Test whether the current procedure is elemental or not. */
15993 gfc_elemental (gfc_symbol
*sym
)
15995 symbol_attribute attr
;
15998 sym
= gfc_current_ns
->proc_name
;
16003 return attr
.flavor
== FL_PROCEDURE
&& attr
.elemental
;
16007 /* Warn about unused labels. */
16010 warn_unused_fortran_label (gfc_st_label
*label
)
16015 warn_unused_fortran_label (label
->left
);
16017 if (label
->defined
== ST_LABEL_UNKNOWN
)
16020 switch (label
->referenced
)
16022 case ST_LABEL_UNKNOWN
:
16023 gfc_warning (OPT_Wunused_label
, "Label %d at %L defined but not used",
16024 label
->value
, &label
->where
);
16027 case ST_LABEL_BAD_TARGET
:
16028 gfc_warning (OPT_Wunused_label
,
16029 "Label %d at %L defined but cannot be used",
16030 label
->value
, &label
->where
);
16037 warn_unused_fortran_label (label
->right
);
16041 /* Returns the sequence type of a symbol or sequence. */
16044 sequence_type (gfc_typespec ts
)
16053 if (ts
.u
.derived
->components
== NULL
)
16054 return SEQ_NONDEFAULT
;
16056 result
= sequence_type (ts
.u
.derived
->components
->ts
);
16057 for (c
= ts
.u
.derived
->components
->next
; c
; c
= c
->next
)
16058 if (sequence_type (c
->ts
) != result
)
16064 if (ts
.kind
!= gfc_default_character_kind
)
16065 return SEQ_NONDEFAULT
;
16067 return SEQ_CHARACTER
;
16070 if (ts
.kind
!= gfc_default_integer_kind
)
16071 return SEQ_NONDEFAULT
;
16073 return SEQ_NUMERIC
;
16076 if (!(ts
.kind
== gfc_default_real_kind
16077 || ts
.kind
== gfc_default_double_kind
))
16078 return SEQ_NONDEFAULT
;
16080 return SEQ_NUMERIC
;
16083 if (ts
.kind
!= gfc_default_complex_kind
)
16084 return SEQ_NONDEFAULT
;
16086 return SEQ_NUMERIC
;
16089 if (ts
.kind
!= gfc_default_logical_kind
)
16090 return SEQ_NONDEFAULT
;
16092 return SEQ_NUMERIC
;
16095 return SEQ_NONDEFAULT
;
16100 /* Resolve derived type EQUIVALENCE object. */
16103 resolve_equivalence_derived (gfc_symbol
*derived
, gfc_symbol
*sym
, gfc_expr
*e
)
16105 gfc_component
*c
= derived
->components
;
16110 /* Shall not be an object of nonsequence derived type. */
16111 if (!derived
->attr
.sequence
)
16113 gfc_error ("Derived type variable %qs at %L must have SEQUENCE "
16114 "attribute to be an EQUIVALENCE object", sym
->name
,
16119 /* Shall not have allocatable components. */
16120 if (derived
->attr
.alloc_comp
)
16122 gfc_error ("Derived type variable %qs at %L cannot have ALLOCATABLE "
16123 "components to be an EQUIVALENCE object",sym
->name
,
16128 if (sym
->attr
.in_common
&& gfc_has_default_initializer (sym
->ts
.u
.derived
))
16130 gfc_error ("Derived type variable %qs at %L with default "
16131 "initialization cannot be in EQUIVALENCE with a variable "
16132 "in COMMON", sym
->name
, &e
->where
);
16136 for (; c
; c
= c
->next
)
16138 if (gfc_bt_struct (c
->ts
.type
)
16139 && (!resolve_equivalence_derived(c
->ts
.u
.derived
, sym
, e
)))
16142 /* Shall not be an object of sequence derived type containing a pointer
16143 in the structure. */
16144 if (c
->attr
.pointer
)
16146 gfc_error ("Derived type variable %qs at %L with pointer "
16147 "component(s) cannot be an EQUIVALENCE object",
16148 sym
->name
, &e
->where
);
16156 /* Resolve equivalence object.
16157 An EQUIVALENCE object shall not be a dummy argument, a pointer, a target,
16158 an allocatable array, an object of nonsequence derived type, an object of
16159 sequence derived type containing a pointer at any level of component
16160 selection, an automatic object, a function name, an entry name, a result
16161 name, a named constant, a structure component, or a subobject of any of
16162 the preceding objects. A substring shall not have length zero. A
16163 derived type shall not have components with default initialization nor
16164 shall two objects of an equivalence group be initialized.
16165 Either all or none of the objects shall have an protected attribute.
16166 The simple constraints are done in symbol.c(check_conflict) and the rest
16167 are implemented here. */
16170 resolve_equivalence (gfc_equiv
*eq
)
16173 gfc_symbol
*first_sym
;
16176 locus
*last_where
= NULL
;
16177 seq_type eq_type
, last_eq_type
;
16178 gfc_typespec
*last_ts
;
16179 int object
, cnt_protected
;
16182 last_ts
= &eq
->expr
->symtree
->n
.sym
->ts
;
16184 first_sym
= eq
->expr
->symtree
->n
.sym
;
16188 for (object
= 1; eq
; eq
= eq
->eq
, object
++)
16192 e
->ts
= e
->symtree
->n
.sym
->ts
;
16193 /* match_varspec might not know yet if it is seeing
16194 array reference or substring reference, as it doesn't
16196 if (e
->ref
&& e
->ref
->type
== REF_ARRAY
)
16198 gfc_ref
*ref
= e
->ref
;
16199 sym
= e
->symtree
->n
.sym
;
16201 if (sym
->attr
.dimension
)
16203 ref
->u
.ar
.as
= sym
->as
;
16207 /* For substrings, convert REF_ARRAY into REF_SUBSTRING. */
16208 if (e
->ts
.type
== BT_CHARACTER
16210 && ref
->type
== REF_ARRAY
16211 && ref
->u
.ar
.dimen
== 1
16212 && ref
->u
.ar
.dimen_type
[0] == DIMEN_RANGE
16213 && ref
->u
.ar
.stride
[0] == NULL
)
16215 gfc_expr
*start
= ref
->u
.ar
.start
[0];
16216 gfc_expr
*end
= ref
->u
.ar
.end
[0];
16219 /* Optimize away the (:) reference. */
16220 if (start
== NULL
&& end
== NULL
)
16223 e
->ref
= ref
->next
;
16225 e
->ref
->next
= ref
->next
;
16230 ref
->type
= REF_SUBSTRING
;
16232 start
= gfc_get_int_expr (gfc_charlen_int_kind
,
16234 ref
->u
.ss
.start
= start
;
16235 if (end
== NULL
&& e
->ts
.u
.cl
)
16236 end
= gfc_copy_expr (e
->ts
.u
.cl
->length
);
16237 ref
->u
.ss
.end
= end
;
16238 ref
->u
.ss
.length
= e
->ts
.u
.cl
;
16245 /* Any further ref is an error. */
16248 gcc_assert (ref
->type
== REF_ARRAY
);
16249 gfc_error ("Syntax error in EQUIVALENCE statement at %L",
16255 if (!gfc_resolve_expr (e
))
16258 sym
= e
->symtree
->n
.sym
;
16260 if (sym
->attr
.is_protected
)
16262 if (cnt_protected
> 0 && cnt_protected
!= object
)
16264 gfc_error ("Either all or none of the objects in the "
16265 "EQUIVALENCE set at %L shall have the "
16266 "PROTECTED attribute",
16271 /* Shall not equivalence common block variables in a PURE procedure. */
16272 if (sym
->ns
->proc_name
16273 && sym
->ns
->proc_name
->attr
.pure
16274 && sym
->attr
.in_common
)
16276 /* Need to check for symbols that may have entered the pure
16277 procedure via a USE statement. */
16278 bool saw_sym
= false;
16279 if (sym
->ns
->use_stmts
)
16282 for (r
= sym
->ns
->use_stmts
->rename
; r
; r
= r
->next
)
16283 if (strcmp(r
->use_name
, sym
->name
) == 0) saw_sym
= true;
16289 gfc_error ("COMMON block member %qs at %L cannot be an "
16290 "EQUIVALENCE object in the pure procedure %qs",
16291 sym
->name
, &e
->where
, sym
->ns
->proc_name
->name
);
16295 /* Shall not be a named constant. */
16296 if (e
->expr_type
== EXPR_CONSTANT
)
16298 gfc_error ("Named constant %qs at %L cannot be an EQUIVALENCE "
16299 "object", sym
->name
, &e
->where
);
16303 if (e
->ts
.type
== BT_DERIVED
16304 && !resolve_equivalence_derived (e
->ts
.u
.derived
, sym
, e
))
16307 /* Check that the types correspond correctly:
16309 A numeric sequence structure may be equivalenced to another sequence
16310 structure, an object of default integer type, default real type, double
16311 precision real type, default logical type such that components of the
16312 structure ultimately only become associated to objects of the same
16313 kind. A character sequence structure may be equivalenced to an object
16314 of default character kind or another character sequence structure.
16315 Other objects may be equivalenced only to objects of the same type and
16316 kind parameters. */
16318 /* Identical types are unconditionally OK. */
16319 if (object
== 1 || gfc_compare_types (last_ts
, &sym
->ts
))
16320 goto identical_types
;
16322 last_eq_type
= sequence_type (*last_ts
);
16323 eq_type
= sequence_type (sym
->ts
);
16325 /* Since the pair of objects is not of the same type, mixed or
16326 non-default sequences can be rejected. */
16328 msg
= "Sequence %s with mixed components in EQUIVALENCE "
16329 "statement at %L with different type objects";
16331 && last_eq_type
== SEQ_MIXED
16332 && !gfc_notify_std (GFC_STD_GNU
, msg
, first_sym
->name
, last_where
))
16333 || (eq_type
== SEQ_MIXED
16334 && !gfc_notify_std (GFC_STD_GNU
, msg
, sym
->name
, &e
->where
)))
16337 msg
= "Non-default type object or sequence %s in EQUIVALENCE "
16338 "statement at %L with objects of different type";
16340 && last_eq_type
== SEQ_NONDEFAULT
16341 && !gfc_notify_std (GFC_STD_GNU
, msg
, first_sym
->name
, last_where
))
16342 || (eq_type
== SEQ_NONDEFAULT
16343 && !gfc_notify_std (GFC_STD_GNU
, msg
, sym
->name
, &e
->where
)))
16346 msg
="Non-CHARACTER object %qs in default CHARACTER "
16347 "EQUIVALENCE statement at %L";
16348 if (last_eq_type
== SEQ_CHARACTER
16349 && eq_type
!= SEQ_CHARACTER
16350 && !gfc_notify_std (GFC_STD_GNU
, msg
, sym
->name
, &e
->where
))
16353 msg
="Non-NUMERIC object %qs in default NUMERIC "
16354 "EQUIVALENCE statement at %L";
16355 if (last_eq_type
== SEQ_NUMERIC
16356 && eq_type
!= SEQ_NUMERIC
16357 && !gfc_notify_std (GFC_STD_GNU
, msg
, sym
->name
, &e
->where
))
16362 last_where
= &e
->where
;
16367 /* Shall not be an automatic array. */
16368 if (e
->ref
->type
== REF_ARRAY
16369 && !gfc_resolve_array_spec (e
->ref
->u
.ar
.as
, 1))
16371 gfc_error ("Array %qs at %L with non-constant bounds cannot be "
16372 "an EQUIVALENCE object", sym
->name
, &e
->where
);
16379 /* Shall not be a structure component. */
16380 if (r
->type
== REF_COMPONENT
)
16382 gfc_error ("Structure component %qs at %L cannot be an "
16383 "EQUIVALENCE object",
16384 r
->u
.c
.component
->name
, &e
->where
);
16388 /* A substring shall not have length zero. */
16389 if (r
->type
== REF_SUBSTRING
)
16391 if (compare_bound (r
->u
.ss
.start
, r
->u
.ss
.end
) == CMP_GT
)
16393 gfc_error ("Substring at %L has length zero",
16394 &r
->u
.ss
.start
->where
);
16404 /* Function called by resolve_fntype to flag other symbol used in the
16405 length type parameter specification of function resuls. */
16408 flag_fn_result_spec (gfc_expr
*expr
,
16410 int *f ATTRIBUTE_UNUSED
)
16415 if (expr
->expr_type
== EXPR_VARIABLE
)
16417 s
= expr
->symtree
->n
.sym
;
16418 for (ns
= s
->ns
; ns
; ns
= ns
->parent
)
16424 gfc_error ("Self reference in character length expression "
16425 "for %qs at %L", sym
->name
, &expr
->where
);
16429 if (!s
->fn_result_spec
16430 && s
->attr
.flavor
== FL_PARAMETER
)
16432 /* Function contained in a module.... */
16433 if (ns
->proc_name
&& ns
->proc_name
->attr
.flavor
== FL_MODULE
)
16436 s
->fn_result_spec
= 1;
16437 /* Make sure that this symbol is translated as a module
16439 st
= gfc_get_unique_symtree (ns
);
16443 /* ... which is use associated and called. */
16444 else if (s
->attr
.use_assoc
|| s
->attr
.used_in_submodule
16446 /* External function matched with an interface. */
16449 && s
->ns
->proc_name
->attr
.if_source
== IFSRC_DECL
)
16450 || s
->ns
->proc_name
->attr
.if_source
== IFSRC_IFBODY
)
16451 && s
->ns
->proc_name
->attr
.function
))
16452 s
->fn_result_spec
= 1;
16459 /* Resolve function and ENTRY types, issue diagnostics if needed. */
16462 resolve_fntype (gfc_namespace
*ns
)
16464 gfc_entry_list
*el
;
16467 if (ns
->proc_name
== NULL
|| !ns
->proc_name
->attr
.function
)
16470 /* If there are any entries, ns->proc_name is the entry master
16471 synthetic symbol and ns->entries->sym actual FUNCTION symbol. */
16473 sym
= ns
->entries
->sym
;
16475 sym
= ns
->proc_name
;
16476 if (sym
->result
== sym
16477 && sym
->ts
.type
== BT_UNKNOWN
16478 && !gfc_set_default_type (sym
, 0, NULL
)
16479 && !sym
->attr
.untyped
)
16481 gfc_error ("Function %qs at %L has no IMPLICIT type",
16482 sym
->name
, &sym
->declared_at
);
16483 sym
->attr
.untyped
= 1;
16486 if (sym
->ts
.type
== BT_DERIVED
&& !sym
->ts
.u
.derived
->attr
.use_assoc
16487 && !sym
->attr
.contained
16488 && !gfc_check_symbol_access (sym
->ts
.u
.derived
)
16489 && gfc_check_symbol_access (sym
))
16491 gfc_notify_std (GFC_STD_F2003
, "PUBLIC function %qs at "
16492 "%L of PRIVATE type %qs", sym
->name
,
16493 &sym
->declared_at
, sym
->ts
.u
.derived
->name
);
16497 for (el
= ns
->entries
->next
; el
; el
= el
->next
)
16499 if (el
->sym
->result
== el
->sym
16500 && el
->sym
->ts
.type
== BT_UNKNOWN
16501 && !gfc_set_default_type (el
->sym
, 0, NULL
)
16502 && !el
->sym
->attr
.untyped
)
16504 gfc_error ("ENTRY %qs at %L has no IMPLICIT type",
16505 el
->sym
->name
, &el
->sym
->declared_at
);
16506 el
->sym
->attr
.untyped
= 1;
16510 if (sym
->ts
.type
== BT_CHARACTER
)
16511 gfc_traverse_expr (sym
->ts
.u
.cl
->length
, sym
, flag_fn_result_spec
, 0);
16515 /* 12.3.2.1.1 Defined operators. */
16518 check_uop_procedure (gfc_symbol
*sym
, locus where
)
16520 gfc_formal_arglist
*formal
;
16522 if (!sym
->attr
.function
)
16524 gfc_error ("User operator procedure %qs at %L must be a FUNCTION",
16525 sym
->name
, &where
);
16529 if (sym
->ts
.type
== BT_CHARACTER
16530 && !((sym
->ts
.u
.cl
&& sym
->ts
.u
.cl
->length
) || sym
->ts
.deferred
)
16531 && !(sym
->result
&& ((sym
->result
->ts
.u
.cl
16532 && sym
->result
->ts
.u
.cl
->length
) || sym
->result
->ts
.deferred
)))
16534 gfc_error ("User operator procedure %qs at %L cannot be assumed "
16535 "character length", sym
->name
, &where
);
16539 formal
= gfc_sym_get_dummy_args (sym
);
16540 if (!formal
|| !formal
->sym
)
16542 gfc_error ("User operator procedure %qs at %L must have at least "
16543 "one argument", sym
->name
, &where
);
16547 if (formal
->sym
->attr
.intent
!= INTENT_IN
)
16549 gfc_error ("First argument of operator interface at %L must be "
16550 "INTENT(IN)", &where
);
16554 if (formal
->sym
->attr
.optional
)
16556 gfc_error ("First argument of operator interface at %L cannot be "
16557 "optional", &where
);
16561 formal
= formal
->next
;
16562 if (!formal
|| !formal
->sym
)
16565 if (formal
->sym
->attr
.intent
!= INTENT_IN
)
16567 gfc_error ("Second argument of operator interface at %L must be "
16568 "INTENT(IN)", &where
);
16572 if (formal
->sym
->attr
.optional
)
16574 gfc_error ("Second argument of operator interface at %L cannot be "
16575 "optional", &where
);
16581 gfc_error ("Operator interface at %L must have, at most, two "
16582 "arguments", &where
);
16590 gfc_resolve_uops (gfc_symtree
*symtree
)
16592 gfc_interface
*itr
;
16594 if (symtree
== NULL
)
16597 gfc_resolve_uops (symtree
->left
);
16598 gfc_resolve_uops (symtree
->right
);
16600 for (itr
= symtree
->n
.uop
->op
; itr
; itr
= itr
->next
)
16601 check_uop_procedure (itr
->sym
, itr
->sym
->declared_at
);
16605 /* Examine all of the expressions associated with a program unit,
16606 assign types to all intermediate expressions, make sure that all
16607 assignments are to compatible types and figure out which names
16608 refer to which functions or subroutines. It doesn't check code
16609 block, which is handled by gfc_resolve_code. */
16612 resolve_types (gfc_namespace
*ns
)
16618 gfc_namespace
* old_ns
= gfc_current_ns
;
16620 if (ns
->types_resolved
)
16623 /* Check that all IMPLICIT types are ok. */
16624 if (!ns
->seen_implicit_none
)
16627 for (letter
= 0; letter
!= GFC_LETTERS
; ++letter
)
16628 if (ns
->set_flag
[letter
]
16629 && !resolve_typespec_used (&ns
->default_type
[letter
],
16630 &ns
->implicit_loc
[letter
], NULL
))
16634 gfc_current_ns
= ns
;
16636 resolve_entries (ns
);
16638 resolve_common_vars (&ns
->blank_common
, false);
16639 resolve_common_blocks (ns
->common_root
);
16641 resolve_contained_functions (ns
);
16643 if (ns
->proc_name
&& ns
->proc_name
->attr
.flavor
== FL_PROCEDURE
16644 && ns
->proc_name
->attr
.if_source
== IFSRC_IFBODY
)
16645 resolve_formal_arglist (ns
->proc_name
);
16647 gfc_traverse_ns (ns
, resolve_bind_c_derived_types
);
16649 for (cl
= ns
->cl_list
; cl
; cl
= cl
->next
)
16650 resolve_charlen (cl
);
16652 gfc_traverse_ns (ns
, resolve_symbol
);
16654 resolve_fntype (ns
);
16656 for (n
= ns
->contained
; n
; n
= n
->sibling
)
16658 if (gfc_pure (ns
->proc_name
) && !gfc_pure (n
->proc_name
))
16659 gfc_error ("Contained procedure %qs at %L of a PURE procedure must "
16660 "also be PURE", n
->proc_name
->name
,
16661 &n
->proc_name
->declared_at
);
16667 gfc_do_concurrent_flag
= 0;
16668 gfc_check_interfaces (ns
);
16670 gfc_traverse_ns (ns
, resolve_values
);
16676 for (d
= ns
->data
; d
; d
= d
->next
)
16680 gfc_traverse_ns (ns
, gfc_formalize_init_value
);
16682 gfc_traverse_ns (ns
, gfc_verify_binding_labels
);
16684 for (eq
= ns
->equiv
; eq
; eq
= eq
->next
)
16685 resolve_equivalence (eq
);
16687 /* Warn about unused labels. */
16688 if (warn_unused_label
)
16689 warn_unused_fortran_label (ns
->st_labels
);
16691 gfc_resolve_uops (ns
->uop_root
);
16693 gfc_traverse_ns (ns
, gfc_verify_DTIO_procedures
);
16695 gfc_resolve_omp_declare_simd (ns
);
16697 gfc_resolve_omp_udrs (ns
->omp_udr_root
);
16699 ns
->types_resolved
= 1;
16701 gfc_current_ns
= old_ns
;
16705 /* Call gfc_resolve_code recursively. */
16708 resolve_codes (gfc_namespace
*ns
)
16711 bitmap_obstack old_obstack
;
16713 if (ns
->resolved
== 1)
16716 for (n
= ns
->contained
; n
; n
= n
->sibling
)
16719 gfc_current_ns
= ns
;
16721 /* Don't clear 'cs_base' if this is the namespace of a BLOCK construct. */
16722 if (!(ns
->proc_name
&& ns
->proc_name
->attr
.flavor
== FL_LABEL
))
16725 /* Set to an out of range value. */
16726 current_entry_id
= -1;
16728 old_obstack
= labels_obstack
;
16729 bitmap_obstack_initialize (&labels_obstack
);
16731 gfc_resolve_oacc_declare (ns
);
16732 gfc_resolve_omp_local_vars (ns
);
16733 gfc_resolve_code (ns
->code
, ns
);
16735 bitmap_obstack_release (&labels_obstack
);
16736 labels_obstack
= old_obstack
;
16740 /* This function is called after a complete program unit has been compiled.
16741 Its purpose is to examine all of the expressions associated with a program
16742 unit, assign types to all intermediate expressions, make sure that all
16743 assignments are to compatible types and figure out which names refer to
16744 which functions or subroutines. */
16747 gfc_resolve (gfc_namespace
*ns
)
16749 gfc_namespace
*old_ns
;
16750 code_stack
*old_cs_base
;
16751 struct gfc_omp_saved_state old_omp_state
;
16757 old_ns
= gfc_current_ns
;
16758 old_cs_base
= cs_base
;
16760 /* As gfc_resolve can be called during resolution of an OpenMP construct
16761 body, we should clear any state associated to it, so that say NS's
16762 DO loops are not interpreted as OpenMP loops. */
16763 if (!ns
->construct_entities
)
16764 gfc_omp_save_and_clear_state (&old_omp_state
);
16766 resolve_types (ns
);
16767 component_assignment_level
= 0;
16768 resolve_codes (ns
);
16770 gfc_current_ns
= old_ns
;
16771 cs_base
= old_cs_base
;
16774 gfc_run_passes (ns
);
16776 if (!ns
->construct_entities
)
16777 gfc_omp_restore_state (&old_omp_state
);