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
);
5057 for (prev
= &expr
->ref
; *prev
!= NULL
;
5058 prev
= *prev
== NULL
? prev
: &(*prev
)->next
)
5059 switch ((*prev
)->type
)
5062 if (!resolve_array_ref (&(*prev
)->u
.ar
))
5071 equal_length
= false;
5072 if (!resolve_substring (*prev
, &equal_length
))
5075 if (expr
->expr_type
!= EXPR_SUBSTRING
&& equal_length
)
5077 /* Remove the reference and move the charlen, if any. */
5081 expr
->ts
.u
.cl
= ref
->u
.ss
.length
;
5082 ref
->u
.ss
.length
= NULL
;
5083 gfc_free_ref_list (ref
);
5088 /* Check constraints on part references. */
5090 current_part_dimension
= 0;
5091 seen_part_dimension
= 0;
5094 for (ref
= expr
->ref
; ref
; ref
= ref
->next
)
5099 switch (ref
->u
.ar
.type
)
5102 /* Coarray scalar. */
5103 if (ref
->u
.ar
.as
->rank
== 0)
5105 current_part_dimension
= 0;
5110 current_part_dimension
= 1;
5114 current_part_dimension
= 0;
5118 gfc_internal_error ("resolve_ref(): Bad array reference");
5124 if (current_part_dimension
|| seen_part_dimension
)
5127 if (ref
->u
.c
.component
->attr
.pointer
5128 || ref
->u
.c
.component
->attr
.proc_pointer
5129 || (ref
->u
.c
.component
->ts
.type
== BT_CLASS
5130 && CLASS_DATA (ref
->u
.c
.component
)->attr
.pointer
))
5132 gfc_error ("Component to the right of a part reference "
5133 "with nonzero rank must not have the POINTER "
5134 "attribute at %L", &expr
->where
);
5137 else if (ref
->u
.c
.component
->attr
.allocatable
5138 || (ref
->u
.c
.component
->ts
.type
== BT_CLASS
5139 && CLASS_DATA (ref
->u
.c
.component
)->attr
.allocatable
))
5142 gfc_error ("Component to the right of a part reference "
5143 "with nonzero rank must not have the ALLOCATABLE "
5144 "attribute at %L", &expr
->where
);
5157 if (((ref
->type
== REF_COMPONENT
&& n_components
> 1)
5158 || ref
->next
== NULL
)
5159 && current_part_dimension
5160 && seen_part_dimension
)
5162 gfc_error ("Two or more part references with nonzero rank must "
5163 "not be specified at %L", &expr
->where
);
5167 if (ref
->type
== REF_COMPONENT
)
5169 if (current_part_dimension
)
5170 seen_part_dimension
= 1;
5172 /* reset to make sure */
5173 current_part_dimension
= 0;
5181 /* Given an expression, determine its shape. This is easier than it sounds.
5182 Leaves the shape array NULL if it is not possible to determine the shape. */
5185 expression_shape (gfc_expr
*e
)
5187 mpz_t array
[GFC_MAX_DIMENSIONS
];
5190 if (e
->rank
<= 0 || e
->shape
!= NULL
)
5193 for (i
= 0; i
< e
->rank
; i
++)
5194 if (!gfc_array_dimen_size (e
, i
, &array
[i
]))
5197 e
->shape
= gfc_get_shape (e
->rank
);
5199 memcpy (e
->shape
, array
, e
->rank
* sizeof (mpz_t
));
5204 for (i
--; i
>= 0; i
--)
5205 mpz_clear (array
[i
]);
5209 /* Given a variable expression node, compute the rank of the expression by
5210 examining the base symbol and any reference structures it may have. */
5213 expression_rank (gfc_expr
*e
)
5218 /* Just to make sure, because EXPR_COMPCALL's also have an e->ref and that
5219 could lead to serious confusion... */
5220 gcc_assert (e
->expr_type
!= EXPR_COMPCALL
);
5224 if (e
->expr_type
== EXPR_ARRAY
)
5226 /* Constructors can have a rank different from one via RESHAPE(). */
5228 if (e
->symtree
== NULL
)
5234 e
->rank
= (e
->symtree
->n
.sym
->as
== NULL
)
5235 ? 0 : e
->symtree
->n
.sym
->as
->rank
;
5241 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
5243 if (ref
->type
== REF_COMPONENT
&& ref
->u
.c
.component
->attr
.proc_pointer
5244 && ref
->u
.c
.component
->attr
.function
&& !ref
->next
)
5245 rank
= ref
->u
.c
.component
->as
? ref
->u
.c
.component
->as
->rank
: 0;
5247 if (ref
->type
!= REF_ARRAY
)
5250 if (ref
->u
.ar
.type
== AR_FULL
)
5252 rank
= ref
->u
.ar
.as
->rank
;
5256 if (ref
->u
.ar
.type
== AR_SECTION
)
5258 /* Figure out the rank of the section. */
5260 gfc_internal_error ("expression_rank(): Two array specs");
5262 for (i
= 0; i
< ref
->u
.ar
.dimen
; i
++)
5263 if (ref
->u
.ar
.dimen_type
[i
] == DIMEN_RANGE
5264 || ref
->u
.ar
.dimen_type
[i
] == DIMEN_VECTOR
)
5274 expression_shape (e
);
5279 add_caf_get_intrinsic (gfc_expr
*e
)
5281 gfc_expr
*wrapper
, *tmp_expr
;
5285 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
5286 if (ref
->type
== REF_ARRAY
&& ref
->u
.ar
.codimen
> 0)
5291 for (n
= ref
->u
.ar
.dimen
; n
< ref
->u
.ar
.dimen
+ ref
->u
.ar
.codimen
; n
++)
5292 if (ref
->u
.ar
.dimen_type
[n
] != DIMEN_ELEMENT
)
5295 tmp_expr
= XCNEW (gfc_expr
);
5297 wrapper
= gfc_build_intrinsic_call (gfc_current_ns
, GFC_ISYM_CAF_GET
,
5298 "caf_get", tmp_expr
->where
, 1, tmp_expr
);
5299 wrapper
->ts
= e
->ts
;
5300 wrapper
->rank
= e
->rank
;
5302 wrapper
->shape
= gfc_copy_shape (e
->shape
, e
->rank
);
5309 remove_caf_get_intrinsic (gfc_expr
*e
)
5311 gcc_assert (e
->expr_type
== EXPR_FUNCTION
&& e
->value
.function
.isym
5312 && e
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
);
5313 gfc_expr
*e2
= e
->value
.function
.actual
->expr
;
5314 e
->value
.function
.actual
->expr
= NULL
;
5315 gfc_free_actual_arglist (e
->value
.function
.actual
);
5316 gfc_free_shape (&e
->shape
, e
->rank
);
5322 /* Resolve a variable expression. */
5325 resolve_variable (gfc_expr
*e
)
5332 if (e
->symtree
== NULL
)
5334 sym
= e
->symtree
->n
.sym
;
5336 /* Use same check as for TYPE(*) below; this check has to be before TYPE(*)
5337 as ts.type is set to BT_ASSUMED in resolve_symbol. */
5338 if (sym
->attr
.ext_attr
& (1 << EXT_ATTR_NO_ARG_CHECK
))
5340 if (!actual_arg
|| inquiry_argument
)
5342 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute may only "
5343 "be used as actual argument", sym
->name
, &e
->where
);
5347 /* TS 29113, 407b. */
5348 else if (e
->ts
.type
== BT_ASSUMED
)
5352 gfc_error ("Assumed-type variable %s at %L may only be used "
5353 "as actual argument", sym
->name
, &e
->where
);
5356 else if (inquiry_argument
&& !first_actual_arg
)
5358 /* FIXME: It doesn't work reliably as inquiry_argument is not set
5359 for all inquiry functions in resolve_function; the reason is
5360 that the function-name resolution happens too late in that
5362 gfc_error ("Assumed-type variable %s at %L as actual argument to "
5363 "an inquiry function shall be the first argument",
5364 sym
->name
, &e
->where
);
5368 /* TS 29113, C535b. */
5369 else if ((sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
5370 && CLASS_DATA (sym
)->as
5371 && CLASS_DATA (sym
)->as
->type
== AS_ASSUMED_RANK
)
5372 || (sym
->ts
.type
!= BT_CLASS
&& sym
->as
5373 && sym
->as
->type
== AS_ASSUMED_RANK
))
5377 gfc_error ("Assumed-rank variable %s at %L may only be used as "
5378 "actual argument", sym
->name
, &e
->where
);
5381 else if (inquiry_argument
&& !first_actual_arg
)
5383 /* FIXME: It doesn't work reliably as inquiry_argument is not set
5384 for all inquiry functions in resolve_function; the reason is
5385 that the function-name resolution happens too late in that
5387 gfc_error ("Assumed-rank variable %s at %L as actual argument "
5388 "to an inquiry function shall be the first argument",
5389 sym
->name
, &e
->where
);
5394 if ((sym
->attr
.ext_attr
& (1 << EXT_ATTR_NO_ARG_CHECK
)) && e
->ref
5395 && !(e
->ref
->type
== REF_ARRAY
&& e
->ref
->u
.ar
.type
== AR_FULL
5396 && e
->ref
->next
== NULL
))
5398 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute shall not have "
5399 "a subobject reference", sym
->name
, &e
->ref
->u
.ar
.where
);
5402 /* TS 29113, 407b. */
5403 else if (e
->ts
.type
== BT_ASSUMED
&& e
->ref
5404 && !(e
->ref
->type
== REF_ARRAY
&& e
->ref
->u
.ar
.type
== AR_FULL
5405 && e
->ref
->next
== NULL
))
5407 gfc_error ("Assumed-type variable %s at %L shall not have a subobject "
5408 "reference", sym
->name
, &e
->ref
->u
.ar
.where
);
5412 /* TS 29113, C535b. */
5413 if (((sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
5414 && CLASS_DATA (sym
)->as
5415 && CLASS_DATA (sym
)->as
->type
== AS_ASSUMED_RANK
)
5416 || (sym
->ts
.type
!= BT_CLASS
&& sym
->as
5417 && sym
->as
->type
== AS_ASSUMED_RANK
))
5419 && !(e
->ref
->type
== REF_ARRAY
&& e
->ref
->u
.ar
.type
== AR_FULL
5420 && e
->ref
->next
== NULL
))
5422 gfc_error ("Assumed-rank variable %s at %L shall not have a subobject "
5423 "reference", sym
->name
, &e
->ref
->u
.ar
.where
);
5427 /* For variables that are used in an associate (target => object) where
5428 the object's basetype is array valued while the target is scalar,
5429 the ts' type of the component refs is still array valued, which
5430 can't be translated that way. */
5431 if (sym
->assoc
&& e
->rank
== 0 && e
->ref
&& sym
->ts
.type
== BT_CLASS
5432 && sym
->assoc
->target
&& sym
->assoc
->target
->ts
.type
== BT_CLASS
5433 && CLASS_DATA (sym
->assoc
->target
)->as
)
5435 gfc_ref
*ref
= e
->ref
;
5441 ref
->u
.c
.sym
= sym
->ts
.u
.derived
;
5442 /* Stop the loop. */
5452 /* If this is an associate-name, it may be parsed with an array reference
5453 in error even though the target is scalar. Fail directly in this case.
5454 TODO Understand why class scalar expressions must be excluded. */
5455 if (sym
->assoc
&& !(sym
->ts
.type
== BT_CLASS
&& e
->rank
== 0))
5457 if (sym
->ts
.type
== BT_CLASS
)
5458 gfc_fix_class_refs (e
);
5459 if (!sym
->attr
.dimension
&& e
->ref
&& e
->ref
->type
== REF_ARRAY
)
5461 else if (sym
->attr
.dimension
&& (!e
->ref
|| e
->ref
->type
!= REF_ARRAY
))
5463 /* This can happen because the parser did not detect that the
5464 associate name is an array and the expression had no array
5466 gfc_ref
*ref
= gfc_get_ref ();
5467 ref
->type
= REF_ARRAY
;
5468 ref
->u
.ar
= *gfc_get_array_ref();
5469 ref
->u
.ar
.type
= AR_FULL
;
5472 ref
->u
.ar
.as
= sym
->as
;
5473 ref
->u
.ar
.dimen
= sym
->as
->rank
;
5481 if (sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
->attr
.generic
)
5482 sym
->ts
.u
.derived
= gfc_find_dt_in_generic (sym
->ts
.u
.derived
);
5484 /* On the other hand, the parser may not have known this is an array;
5485 in this case, we have to add a FULL reference. */
5486 if (sym
->assoc
&& sym
->attr
.dimension
&& !e
->ref
)
5488 e
->ref
= gfc_get_ref ();
5489 e
->ref
->type
= REF_ARRAY
;
5490 e
->ref
->u
.ar
.type
= AR_FULL
;
5491 e
->ref
->u
.ar
.dimen
= 0;
5494 /* Like above, but for class types, where the checking whether an array
5495 ref is present is more complicated. Furthermore make sure not to add
5496 the full array ref to _vptr or _len refs. */
5497 if (sym
->assoc
&& sym
->ts
.type
== BT_CLASS
5498 && CLASS_DATA (sym
)->attr
.dimension
5499 && (e
->ts
.type
!= BT_DERIVED
|| !e
->ts
.u
.derived
->attr
.vtype
))
5501 gfc_ref
*ref
, *newref
;
5503 newref
= gfc_get_ref ();
5504 newref
->type
= REF_ARRAY
;
5505 newref
->u
.ar
.type
= AR_FULL
;
5506 newref
->u
.ar
.dimen
= 0;
5507 /* Because this is an associate var and the first ref either is a ref to
5508 the _data component or not, no traversal of the ref chain is
5509 needed. The array ref needs to be inserted after the _data ref,
5510 or when that is not present, which may happend for polymorphic
5511 types, then at the first position. */
5515 else if (ref
->type
== REF_COMPONENT
5516 && strcmp ("_data", ref
->u
.c
.component
->name
) == 0)
5518 if (!ref
->next
|| ref
->next
->type
!= REF_ARRAY
)
5520 newref
->next
= ref
->next
;
5524 /* Array ref present already. */
5525 gfc_free_ref_list (newref
);
5527 else if (ref
->type
== REF_ARRAY
)
5528 /* Array ref present already. */
5529 gfc_free_ref_list (newref
);
5537 if (e
->ref
&& !resolve_ref (e
))
5540 if (sym
->attr
.flavor
== FL_PROCEDURE
5541 && (!sym
->attr
.function
5542 || (sym
->attr
.function
&& sym
->result
5543 && sym
->result
->attr
.proc_pointer
5544 && !sym
->result
->attr
.function
)))
5546 e
->ts
.type
= BT_PROCEDURE
;
5547 goto resolve_procedure
;
5550 if (sym
->ts
.type
!= BT_UNKNOWN
)
5551 gfc_variable_attr (e
, &e
->ts
);
5552 else if (sym
->attr
.flavor
== FL_PROCEDURE
5553 && sym
->attr
.function
&& sym
->result
5554 && sym
->result
->ts
.type
!= BT_UNKNOWN
5555 && sym
->result
->attr
.proc_pointer
)
5556 e
->ts
= sym
->result
->ts
;
5559 /* Must be a simple variable reference. */
5560 if (!gfc_set_default_type (sym
, 1, sym
->ns
))
5565 if (check_assumed_size_reference (sym
, e
))
5568 /* Deal with forward references to entries during gfc_resolve_code, to
5569 satisfy, at least partially, 12.5.2.5. */
5570 if (gfc_current_ns
->entries
5571 && current_entry_id
== sym
->entry_id
5574 && cs_base
->current
->op
!= EXEC_ENTRY
)
5576 gfc_entry_list
*entry
;
5577 gfc_formal_arglist
*formal
;
5579 bool seen
, saved_specification_expr
;
5581 /* If the symbol is a dummy... */
5582 if (sym
->attr
.dummy
&& sym
->ns
== gfc_current_ns
)
5584 entry
= gfc_current_ns
->entries
;
5587 /* ...test if the symbol is a parameter of previous entries. */
5588 for (; entry
&& entry
->id
<= current_entry_id
; entry
= entry
->next
)
5589 for (formal
= entry
->sym
->formal
; formal
; formal
= formal
->next
)
5591 if (formal
->sym
&& sym
->name
== formal
->sym
->name
)
5598 /* If it has not been seen as a dummy, this is an error. */
5601 if (specification_expr
)
5602 gfc_error ("Variable %qs, used in a specification expression"
5603 ", is referenced at %L before the ENTRY statement "
5604 "in which it is a parameter",
5605 sym
->name
, &cs_base
->current
->loc
);
5607 gfc_error ("Variable %qs is used at %L before the ENTRY "
5608 "statement in which it is a parameter",
5609 sym
->name
, &cs_base
->current
->loc
);
5614 /* Now do the same check on the specification expressions. */
5615 saved_specification_expr
= specification_expr
;
5616 specification_expr
= true;
5617 if (sym
->ts
.type
== BT_CHARACTER
5618 && !gfc_resolve_expr (sym
->ts
.u
.cl
->length
))
5622 for (n
= 0; n
< sym
->as
->rank
; n
++)
5624 if (!gfc_resolve_expr (sym
->as
->lower
[n
]))
5626 if (!gfc_resolve_expr (sym
->as
->upper
[n
]))
5629 specification_expr
= saved_specification_expr
;
5632 /* Update the symbol's entry level. */
5633 sym
->entry_id
= current_entry_id
+ 1;
5636 /* If a symbol has been host_associated mark it. This is used latter,
5637 to identify if aliasing is possible via host association. */
5638 if (sym
->attr
.flavor
== FL_VARIABLE
5639 && gfc_current_ns
->parent
5640 && (gfc_current_ns
->parent
== sym
->ns
5641 || (gfc_current_ns
->parent
->parent
5642 && gfc_current_ns
->parent
->parent
== sym
->ns
)))
5643 sym
->attr
.host_assoc
= 1;
5645 if (gfc_current_ns
->proc_name
5646 && sym
->attr
.dimension
5647 && (sym
->ns
!= gfc_current_ns
5648 || sym
->attr
.use_assoc
5649 || sym
->attr
.in_common
))
5650 gfc_current_ns
->proc_name
->attr
.array_outer_dependency
= 1;
5653 if (t
&& !resolve_procedure_expression (e
))
5656 /* F2008, C617 and C1229. */
5657 if (!inquiry_argument
&& (e
->ts
.type
== BT_CLASS
|| e
->ts
.type
== BT_DERIVED
)
5658 && gfc_is_coindexed (e
))
5660 gfc_ref
*ref
, *ref2
= NULL
;
5662 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
5664 if (ref
->type
== REF_COMPONENT
)
5666 if (ref
->type
== REF_ARRAY
&& ref
->u
.ar
.codimen
> 0)
5670 for ( ; ref
; ref
= ref
->next
)
5671 if (ref
->type
== REF_COMPONENT
)
5674 /* Expression itself is not coindexed object. */
5675 if (ref
&& e
->ts
.type
== BT_CLASS
)
5677 gfc_error ("Polymorphic subobject of coindexed object at %L",
5682 /* Expression itself is coindexed object. */
5686 c
= ref2
? ref2
->u
.c
.component
: e
->symtree
->n
.sym
->components
;
5687 for ( ; c
; c
= c
->next
)
5688 if (c
->attr
.allocatable
&& c
->ts
.type
== BT_CLASS
)
5690 gfc_error ("Coindexed object with polymorphic allocatable "
5691 "subcomponent at %L", &e
->where
);
5699 expression_rank (e
);
5701 if (t
&& flag_coarray
== GFC_FCOARRAY_LIB
&& gfc_is_coindexed (e
))
5702 add_caf_get_intrinsic (e
);
5704 /* Simplify cases where access to a parameter array results in a
5705 single constant. Suppress errors since those will have been
5706 issued before, as warnings. */
5707 if (e
->rank
== 0 && sym
->as
&& sym
->attr
.flavor
== FL_PARAMETER
)
5709 gfc_push_suppress_errors ();
5710 gfc_simplify_expr (e
, 1);
5711 gfc_pop_suppress_errors ();
5718 /* Checks to see that the correct symbol has been host associated.
5719 The only situation where this arises is that in which a twice
5720 contained function is parsed after the host association is made.
5721 Therefore, on detecting this, change the symbol in the expression
5722 and convert the array reference into an actual arglist if the old
5723 symbol is a variable. */
5725 check_host_association (gfc_expr
*e
)
5727 gfc_symbol
*sym
, *old_sym
;
5731 gfc_actual_arglist
*arg
, *tail
= NULL
;
5732 bool retval
= e
->expr_type
== EXPR_FUNCTION
;
5734 /* If the expression is the result of substitution in
5735 interface.c(gfc_extend_expr) because there is no way in
5736 which the host association can be wrong. */
5737 if (e
->symtree
== NULL
5738 || e
->symtree
->n
.sym
== NULL
5739 || e
->user_operator
)
5742 old_sym
= e
->symtree
->n
.sym
;
5744 if (gfc_current_ns
->parent
5745 && old_sym
->ns
!= gfc_current_ns
)
5747 /* Use the 'USE' name so that renamed module symbols are
5748 correctly handled. */
5749 gfc_find_symbol (e
->symtree
->name
, gfc_current_ns
, 1, &sym
);
5751 if (sym
&& old_sym
!= sym
5752 && sym
->ts
.type
== old_sym
->ts
.type
5753 && sym
->attr
.flavor
== FL_PROCEDURE
5754 && sym
->attr
.contained
)
5756 /* Clear the shape, since it might not be valid. */
5757 gfc_free_shape (&e
->shape
, e
->rank
);
5759 /* Give the expression the right symtree! */
5760 gfc_find_sym_tree (e
->symtree
->name
, NULL
, 1, &st
);
5761 gcc_assert (st
!= NULL
);
5763 if (old_sym
->attr
.flavor
== FL_PROCEDURE
5764 || e
->expr_type
== EXPR_FUNCTION
)
5766 /* Original was function so point to the new symbol, since
5767 the actual argument list is already attached to the
5769 e
->value
.function
.esym
= NULL
;
5774 /* Original was variable so convert array references into
5775 an actual arglist. This does not need any checking now
5776 since resolve_function will take care of it. */
5777 e
->value
.function
.actual
= NULL
;
5778 e
->expr_type
= EXPR_FUNCTION
;
5781 /* Ambiguity will not arise if the array reference is not
5782 the last reference. */
5783 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
5784 if (ref
->type
== REF_ARRAY
&& ref
->next
== NULL
)
5787 gcc_assert (ref
->type
== REF_ARRAY
);
5789 /* Grab the start expressions from the array ref and
5790 copy them into actual arguments. */
5791 for (n
= 0; n
< ref
->u
.ar
.dimen
; n
++)
5793 arg
= gfc_get_actual_arglist ();
5794 arg
->expr
= gfc_copy_expr (ref
->u
.ar
.start
[n
]);
5795 if (e
->value
.function
.actual
== NULL
)
5796 tail
= e
->value
.function
.actual
= arg
;
5804 /* Dump the reference list and set the rank. */
5805 gfc_free_ref_list (e
->ref
);
5807 e
->rank
= sym
->as
? sym
->as
->rank
: 0;
5810 gfc_resolve_expr (e
);
5814 /* This might have changed! */
5815 return e
->expr_type
== EXPR_FUNCTION
;
5820 gfc_resolve_character_operator (gfc_expr
*e
)
5822 gfc_expr
*op1
= e
->value
.op
.op1
;
5823 gfc_expr
*op2
= e
->value
.op
.op2
;
5824 gfc_expr
*e1
= NULL
;
5825 gfc_expr
*e2
= NULL
;
5827 gcc_assert (e
->value
.op
.op
== INTRINSIC_CONCAT
);
5829 if (op1
->ts
.u
.cl
&& op1
->ts
.u
.cl
->length
)
5830 e1
= gfc_copy_expr (op1
->ts
.u
.cl
->length
);
5831 else if (op1
->expr_type
== EXPR_CONSTANT
)
5832 e1
= gfc_get_int_expr (gfc_charlen_int_kind
, NULL
,
5833 op1
->value
.character
.length
);
5835 if (op2
->ts
.u
.cl
&& op2
->ts
.u
.cl
->length
)
5836 e2
= gfc_copy_expr (op2
->ts
.u
.cl
->length
);
5837 else if (op2
->expr_type
== EXPR_CONSTANT
)
5838 e2
= gfc_get_int_expr (gfc_charlen_int_kind
, NULL
,
5839 op2
->value
.character
.length
);
5841 e
->ts
.u
.cl
= gfc_new_charlen (gfc_current_ns
, NULL
);
5851 e
->ts
.u
.cl
->length
= gfc_add (e1
, e2
);
5852 e
->ts
.u
.cl
->length
->ts
.type
= BT_INTEGER
;
5853 e
->ts
.u
.cl
->length
->ts
.kind
= gfc_charlen_int_kind
;
5854 gfc_simplify_expr (e
->ts
.u
.cl
->length
, 0);
5855 gfc_resolve_expr (e
->ts
.u
.cl
->length
);
5861 /* Ensure that an character expression has a charlen and, if possible, a
5862 length expression. */
5865 fixup_charlen (gfc_expr
*e
)
5867 /* The cases fall through so that changes in expression type and the need
5868 for multiple fixes are picked up. In all circumstances, a charlen should
5869 be available for the middle end to hang a backend_decl on. */
5870 switch (e
->expr_type
)
5873 gfc_resolve_character_operator (e
);
5877 if (e
->expr_type
== EXPR_ARRAY
)
5878 gfc_resolve_character_array_constructor (e
);
5881 case EXPR_SUBSTRING
:
5882 if (!e
->ts
.u
.cl
&& e
->ref
)
5883 gfc_resolve_substring_charlen (e
);
5888 e
->ts
.u
.cl
= gfc_new_charlen (gfc_current_ns
, NULL
);
5895 /* Update an actual argument to include the passed-object for type-bound
5896 procedures at the right position. */
5898 static gfc_actual_arglist
*
5899 update_arglist_pass (gfc_actual_arglist
* lst
, gfc_expr
* po
, unsigned argpos
,
5902 gcc_assert (argpos
> 0);
5906 gfc_actual_arglist
* result
;
5908 result
= gfc_get_actual_arglist ();
5912 result
->name
= name
;
5918 lst
->next
= update_arglist_pass (lst
->next
, po
, argpos
- 1, name
);
5920 lst
= update_arglist_pass (NULL
, po
, argpos
- 1, name
);
5925 /* Extract the passed-object from an EXPR_COMPCALL (a copy of it). */
5928 extract_compcall_passed_object (gfc_expr
* e
)
5932 gcc_assert (e
->expr_type
== EXPR_COMPCALL
);
5934 if (e
->value
.compcall
.base_object
)
5935 po
= gfc_copy_expr (e
->value
.compcall
.base_object
);
5938 po
= gfc_get_expr ();
5939 po
->expr_type
= EXPR_VARIABLE
;
5940 po
->symtree
= e
->symtree
;
5941 po
->ref
= gfc_copy_ref (e
->ref
);
5942 po
->where
= e
->where
;
5945 if (!gfc_resolve_expr (po
))
5952 /* Update the arglist of an EXPR_COMPCALL expression to include the
5956 update_compcall_arglist (gfc_expr
* e
)
5959 gfc_typebound_proc
* tbp
;
5961 tbp
= e
->value
.compcall
.tbp
;
5966 po
= extract_compcall_passed_object (e
);
5970 if (tbp
->nopass
|| e
->value
.compcall
.ignore_pass
)
5976 if (tbp
->pass_arg_num
<= 0)
5979 e
->value
.compcall
.actual
= update_arglist_pass (e
->value
.compcall
.actual
, po
,
5987 /* Extract the passed object from a PPC call (a copy of it). */
5990 extract_ppc_passed_object (gfc_expr
*e
)
5995 po
= gfc_get_expr ();
5996 po
->expr_type
= EXPR_VARIABLE
;
5997 po
->symtree
= e
->symtree
;
5998 po
->ref
= gfc_copy_ref (e
->ref
);
5999 po
->where
= e
->where
;
6001 /* Remove PPC reference. */
6003 while ((*ref
)->next
)
6004 ref
= &(*ref
)->next
;
6005 gfc_free_ref_list (*ref
);
6008 if (!gfc_resolve_expr (po
))
6015 /* Update the actual arglist of a procedure pointer component to include the
6019 update_ppc_arglist (gfc_expr
* e
)
6023 gfc_typebound_proc
* tb
;
6025 ppc
= gfc_get_proc_ptr_comp (e
);
6033 else if (tb
->nopass
)
6036 po
= extract_ppc_passed_object (e
);
6043 gfc_error ("Passed-object at %L must be scalar", &e
->where
);
6048 if (po
->ts
.type
== BT_DERIVED
&& po
->ts
.u
.derived
->attr
.abstract
)
6050 gfc_error ("Base object for procedure-pointer component call at %L is of"
6051 " ABSTRACT type %qs", &e
->where
, po
->ts
.u
.derived
->name
);
6055 gcc_assert (tb
->pass_arg_num
> 0);
6056 e
->value
.compcall
.actual
= update_arglist_pass (e
->value
.compcall
.actual
, po
,
6064 /* Check that the object a TBP is called on is valid, i.e. it must not be
6065 of ABSTRACT type (as in subobject%abstract_parent%tbp()). */
6068 check_typebound_baseobject (gfc_expr
* e
)
6071 bool return_value
= false;
6073 base
= extract_compcall_passed_object (e
);
6077 gcc_assert (base
->ts
.type
== BT_DERIVED
|| base
->ts
.type
== BT_CLASS
);
6079 if (base
->ts
.type
== BT_CLASS
&& !gfc_expr_attr (base
).class_ok
)
6083 if (base
->ts
.type
== BT_DERIVED
&& base
->ts
.u
.derived
->attr
.abstract
)
6085 gfc_error ("Base object for type-bound procedure call at %L is of"
6086 " ABSTRACT type %qs", &e
->where
, base
->ts
.u
.derived
->name
);
6090 /* F08:C1230. If the procedure called is NOPASS,
6091 the base object must be scalar. */
6092 if (e
->value
.compcall
.tbp
->nopass
&& base
->rank
!= 0)
6094 gfc_error ("Base object for NOPASS type-bound procedure call at %L must"
6095 " be scalar", &e
->where
);
6099 return_value
= true;
6102 gfc_free_expr (base
);
6103 return return_value
;
6107 /* Resolve a call to a type-bound procedure, either function or subroutine,
6108 statically from the data in an EXPR_COMPCALL expression. The adapted
6109 arglist and the target-procedure symtree are returned. */
6112 resolve_typebound_static (gfc_expr
* e
, gfc_symtree
** target
,
6113 gfc_actual_arglist
** actual
)
6115 gcc_assert (e
->expr_type
== EXPR_COMPCALL
);
6116 gcc_assert (!e
->value
.compcall
.tbp
->is_generic
);
6118 /* Update the actual arglist for PASS. */
6119 if (!update_compcall_arglist (e
))
6122 *actual
= e
->value
.compcall
.actual
;
6123 *target
= e
->value
.compcall
.tbp
->u
.specific
;
6125 gfc_free_ref_list (e
->ref
);
6127 e
->value
.compcall
.actual
= NULL
;
6129 /* If we find a deferred typebound procedure, check for derived types
6130 that an overriding typebound procedure has not been missed. */
6131 if (e
->value
.compcall
.name
6132 && !e
->value
.compcall
.tbp
->non_overridable
6133 && e
->value
.compcall
.base_object
6134 && e
->value
.compcall
.base_object
->ts
.type
== BT_DERIVED
)
6137 gfc_symbol
*derived
;
6139 /* Use the derived type of the base_object. */
6140 derived
= e
->value
.compcall
.base_object
->ts
.u
.derived
;
6143 /* If necessary, go through the inheritance chain. */
6144 while (!st
&& derived
)
6146 /* Look for the typebound procedure 'name'. */
6147 if (derived
->f2k_derived
&& derived
->f2k_derived
->tb_sym_root
)
6148 st
= gfc_find_symtree (derived
->f2k_derived
->tb_sym_root
,
6149 e
->value
.compcall
.name
);
6151 derived
= gfc_get_derived_super_type (derived
);
6154 /* Now find the specific name in the derived type namespace. */
6155 if (st
&& st
->n
.tb
&& st
->n
.tb
->u
.specific
)
6156 gfc_find_sym_tree (st
->n
.tb
->u
.specific
->name
,
6157 derived
->ns
, 1, &st
);
6165 /* Get the ultimate declared type from an expression. In addition,
6166 return the last class/derived type reference and the copy of the
6167 reference list. If check_types is set true, derived types are
6168 identified as well as class references. */
6170 get_declared_from_expr (gfc_ref
**class_ref
, gfc_ref
**new_ref
,
6171 gfc_expr
*e
, bool check_types
)
6173 gfc_symbol
*declared
;
6180 *new_ref
= gfc_copy_ref (e
->ref
);
6182 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
6184 if (ref
->type
!= REF_COMPONENT
)
6187 if ((ref
->u
.c
.component
->ts
.type
== BT_CLASS
6188 || (check_types
&& gfc_bt_struct (ref
->u
.c
.component
->ts
.type
)))
6189 && ref
->u
.c
.component
->attr
.flavor
!= FL_PROCEDURE
)
6191 declared
= ref
->u
.c
.component
->ts
.u
.derived
;
6197 if (declared
== NULL
)
6198 declared
= e
->symtree
->n
.sym
->ts
.u
.derived
;
6204 /* Given an EXPR_COMPCALL calling a GENERIC typebound procedure, figure out
6205 which of the specific bindings (if any) matches the arglist and transform
6206 the expression into a call of that binding. */
6209 resolve_typebound_generic_call (gfc_expr
* e
, const char **name
)
6211 gfc_typebound_proc
* genproc
;
6212 const char* genname
;
6214 gfc_symbol
*derived
;
6216 gcc_assert (e
->expr_type
== EXPR_COMPCALL
);
6217 genname
= e
->value
.compcall
.name
;
6218 genproc
= e
->value
.compcall
.tbp
;
6220 if (!genproc
->is_generic
)
6223 /* Try the bindings on this type and in the inheritance hierarchy. */
6224 for (; genproc
; genproc
= genproc
->overridden
)
6228 gcc_assert (genproc
->is_generic
);
6229 for (g
= genproc
->u
.generic
; g
; g
= g
->next
)
6232 gfc_actual_arglist
* args
;
6235 gcc_assert (g
->specific
);
6237 if (g
->specific
->error
)
6240 target
= g
->specific
->u
.specific
->n
.sym
;
6242 /* Get the right arglist by handling PASS/NOPASS. */
6243 args
= gfc_copy_actual_arglist (e
->value
.compcall
.actual
);
6244 if (!g
->specific
->nopass
)
6247 po
= extract_compcall_passed_object (e
);
6250 gfc_free_actual_arglist (args
);
6254 gcc_assert (g
->specific
->pass_arg_num
> 0);
6255 gcc_assert (!g
->specific
->error
);
6256 args
= update_arglist_pass (args
, po
, g
->specific
->pass_arg_num
,
6257 g
->specific
->pass_arg
);
6259 resolve_actual_arglist (args
, target
->attr
.proc
,
6260 is_external_proc (target
)
6261 && gfc_sym_get_dummy_args (target
) == NULL
);
6263 /* Check if this arglist matches the formal. */
6264 matches
= gfc_arglist_matches_symbol (&args
, target
);
6266 /* Clean up and break out of the loop if we've found it. */
6267 gfc_free_actual_arglist (args
);
6270 e
->value
.compcall
.tbp
= g
->specific
;
6271 genname
= g
->specific_st
->name
;
6272 /* Pass along the name for CLASS methods, where the vtab
6273 procedure pointer component has to be referenced. */
6281 /* Nothing matching found! */
6282 gfc_error ("Found no matching specific binding for the call to the GENERIC"
6283 " %qs at %L", genname
, &e
->where
);
6287 /* Make sure that we have the right specific instance for the name. */
6288 derived
= get_declared_from_expr (NULL
, NULL
, e
, true);
6290 st
= gfc_find_typebound_proc (derived
, NULL
, genname
, true, &e
->where
);
6292 e
->value
.compcall
.tbp
= st
->n
.tb
;
6298 /* Resolve a call to a type-bound subroutine. */
6301 resolve_typebound_call (gfc_code
* c
, const char **name
, bool *overridable
)
6303 gfc_actual_arglist
* newactual
;
6304 gfc_symtree
* target
;
6306 /* Check that's really a SUBROUTINE. */
6307 if (!c
->expr1
->value
.compcall
.tbp
->subroutine
)
6309 if (!c
->expr1
->value
.compcall
.tbp
->is_generic
6310 && c
->expr1
->value
.compcall
.tbp
->u
.specific
6311 && c
->expr1
->value
.compcall
.tbp
->u
.specific
->n
.sym
6312 && c
->expr1
->value
.compcall
.tbp
->u
.specific
->n
.sym
->attr
.subroutine
)
6313 c
->expr1
->value
.compcall
.tbp
->subroutine
= 1;
6316 gfc_error ("%qs at %L should be a SUBROUTINE",
6317 c
->expr1
->value
.compcall
.name
, &c
->loc
);
6322 if (!check_typebound_baseobject (c
->expr1
))
6325 /* Pass along the name for CLASS methods, where the vtab
6326 procedure pointer component has to be referenced. */
6328 *name
= c
->expr1
->value
.compcall
.name
;
6330 if (!resolve_typebound_generic_call (c
->expr1
, name
))
6333 /* Pass along the NON_OVERRIDABLE attribute of the specific TBP. */
6335 *overridable
= !c
->expr1
->value
.compcall
.tbp
->non_overridable
;
6337 /* Transform into an ordinary EXEC_CALL for now. */
6339 if (!resolve_typebound_static (c
->expr1
, &target
, &newactual
))
6342 c
->ext
.actual
= newactual
;
6343 c
->symtree
= target
;
6344 c
->op
= (c
->expr1
->value
.compcall
.assign
? EXEC_ASSIGN_CALL
: EXEC_CALL
);
6346 gcc_assert (!c
->expr1
->ref
&& !c
->expr1
->value
.compcall
.actual
);
6348 gfc_free_expr (c
->expr1
);
6349 c
->expr1
= gfc_get_expr ();
6350 c
->expr1
->expr_type
= EXPR_FUNCTION
;
6351 c
->expr1
->symtree
= target
;
6352 c
->expr1
->where
= c
->loc
;
6354 return resolve_call (c
);
6358 /* Resolve a component-call expression. */
6360 resolve_compcall (gfc_expr
* e
, const char **name
)
6362 gfc_actual_arglist
* newactual
;
6363 gfc_symtree
* target
;
6365 /* Check that's really a FUNCTION. */
6366 if (!e
->value
.compcall
.tbp
->function
)
6368 gfc_error ("%qs at %L should be a FUNCTION",
6369 e
->value
.compcall
.name
, &e
->where
);
6373 /* These must not be assign-calls! */
6374 gcc_assert (!e
->value
.compcall
.assign
);
6376 if (!check_typebound_baseobject (e
))
6379 /* Pass along the name for CLASS methods, where the vtab
6380 procedure pointer component has to be referenced. */
6382 *name
= e
->value
.compcall
.name
;
6384 if (!resolve_typebound_generic_call (e
, name
))
6386 gcc_assert (!e
->value
.compcall
.tbp
->is_generic
);
6388 /* Take the rank from the function's symbol. */
6389 if (e
->value
.compcall
.tbp
->u
.specific
->n
.sym
->as
)
6390 e
->rank
= e
->value
.compcall
.tbp
->u
.specific
->n
.sym
->as
->rank
;
6392 /* For now, we simply transform it into an EXPR_FUNCTION call with the same
6393 arglist to the TBP's binding target. */
6395 if (!resolve_typebound_static (e
, &target
, &newactual
))
6398 e
->value
.function
.actual
= newactual
;
6399 e
->value
.function
.name
= NULL
;
6400 e
->value
.function
.esym
= target
->n
.sym
;
6401 e
->value
.function
.isym
= NULL
;
6402 e
->symtree
= target
;
6403 e
->ts
= target
->n
.sym
->ts
;
6404 e
->expr_type
= EXPR_FUNCTION
;
6406 /* Resolution is not necessary if this is a class subroutine; this
6407 function only has to identify the specific proc. Resolution of
6408 the call will be done next in resolve_typebound_call. */
6409 return gfc_resolve_expr (e
);
6413 static bool resolve_fl_derived (gfc_symbol
*sym
);
6416 /* Resolve a typebound function, or 'method'. First separate all
6417 the non-CLASS references by calling resolve_compcall directly. */
6420 resolve_typebound_function (gfc_expr
* e
)
6422 gfc_symbol
*declared
;
6434 /* Deal with typebound operators for CLASS objects. */
6435 expr
= e
->value
.compcall
.base_object
;
6436 overridable
= !e
->value
.compcall
.tbp
->non_overridable
;
6437 if (expr
&& expr
->ts
.type
== BT_CLASS
&& e
->value
.compcall
.name
)
6439 /* If the base_object is not a variable, the corresponding actual
6440 argument expression must be stored in e->base_expression so
6441 that the corresponding tree temporary can be used as the base
6442 object in gfc_conv_procedure_call. */
6443 if (expr
->expr_type
!= EXPR_VARIABLE
)
6445 gfc_actual_arglist
*args
;
6447 for (args
= e
->value
.function
.actual
; args
; args
= args
->next
)
6449 if (expr
== args
->expr
)
6454 /* Since the typebound operators are generic, we have to ensure
6455 that any delays in resolution are corrected and that the vtab
6458 declared
= ts
.u
.derived
;
6459 c
= gfc_find_component (declared
, "_vptr", true, true, NULL
);
6460 if (c
->ts
.u
.derived
== NULL
)
6461 c
->ts
.u
.derived
= gfc_find_derived_vtab (declared
);
6463 if (!resolve_compcall (e
, &name
))
6466 /* Use the generic name if it is there. */
6467 name
= name
? name
: e
->value
.function
.esym
->name
;
6468 e
->symtree
= expr
->symtree
;
6469 e
->ref
= gfc_copy_ref (expr
->ref
);
6470 get_declared_from_expr (&class_ref
, NULL
, e
, false);
6472 /* Trim away the extraneous references that emerge from nested
6473 use of interface.c (extend_expr). */
6474 if (class_ref
&& class_ref
->next
)
6476 gfc_free_ref_list (class_ref
->next
);
6477 class_ref
->next
= NULL
;
6479 else if (e
->ref
&& !class_ref
&& expr
->ts
.type
!= BT_CLASS
)
6481 gfc_free_ref_list (e
->ref
);
6485 gfc_add_vptr_component (e
);
6486 gfc_add_component_ref (e
, name
);
6487 e
->value
.function
.esym
= NULL
;
6488 if (expr
->expr_type
!= EXPR_VARIABLE
)
6489 e
->base_expr
= expr
;
6494 return resolve_compcall (e
, NULL
);
6496 if (!resolve_ref (e
))
6499 /* Get the CLASS declared type. */
6500 declared
= get_declared_from_expr (&class_ref
, &new_ref
, e
, true);
6502 if (!resolve_fl_derived (declared
))
6505 /* Weed out cases of the ultimate component being a derived type. */
6506 if ((class_ref
&& gfc_bt_struct (class_ref
->u
.c
.component
->ts
.type
))
6507 || (!class_ref
&& st
->n
.sym
->ts
.type
!= BT_CLASS
))
6509 gfc_free_ref_list (new_ref
);
6510 return resolve_compcall (e
, NULL
);
6513 c
= gfc_find_component (declared
, "_data", true, true, NULL
);
6514 declared
= c
->ts
.u
.derived
;
6516 /* Treat the call as if it is a typebound procedure, in order to roll
6517 out the correct name for the specific function. */
6518 if (!resolve_compcall (e
, &name
))
6520 gfc_free_ref_list (new_ref
);
6527 /* Convert the expression to a procedure pointer component call. */
6528 e
->value
.function
.esym
= NULL
;
6534 /* '_vptr' points to the vtab, which contains the procedure pointers. */
6535 gfc_add_vptr_component (e
);
6536 gfc_add_component_ref (e
, name
);
6538 /* Recover the typespec for the expression. This is really only
6539 necessary for generic procedures, where the additional call
6540 to gfc_add_component_ref seems to throw the collection of the
6541 correct typespec. */
6545 gfc_free_ref_list (new_ref
);
6550 /* Resolve a typebound subroutine, or 'method'. First separate all
6551 the non-CLASS references by calling resolve_typebound_call
6555 resolve_typebound_subroutine (gfc_code
*code
)
6557 gfc_symbol
*declared
;
6567 st
= code
->expr1
->symtree
;
6569 /* Deal with typebound operators for CLASS objects. */
6570 expr
= code
->expr1
->value
.compcall
.base_object
;
6571 overridable
= !code
->expr1
->value
.compcall
.tbp
->non_overridable
;
6572 if (expr
&& expr
->ts
.type
== BT_CLASS
&& code
->expr1
->value
.compcall
.name
)
6574 /* If the base_object is not a variable, the corresponding actual
6575 argument expression must be stored in e->base_expression so
6576 that the corresponding tree temporary can be used as the base
6577 object in gfc_conv_procedure_call. */
6578 if (expr
->expr_type
!= EXPR_VARIABLE
)
6580 gfc_actual_arglist
*args
;
6582 args
= code
->expr1
->value
.function
.actual
;
6583 for (; args
; args
= args
->next
)
6584 if (expr
== args
->expr
)
6588 /* Since the typebound operators are generic, we have to ensure
6589 that any delays in resolution are corrected and that the vtab
6591 declared
= expr
->ts
.u
.derived
;
6592 c
= gfc_find_component (declared
, "_vptr", true, true, NULL
);
6593 if (c
->ts
.u
.derived
== NULL
)
6594 c
->ts
.u
.derived
= gfc_find_derived_vtab (declared
);
6596 if (!resolve_typebound_call (code
, &name
, NULL
))
6599 /* Use the generic name if it is there. */
6600 name
= name
? name
: code
->expr1
->value
.function
.esym
->name
;
6601 code
->expr1
->symtree
= expr
->symtree
;
6602 code
->expr1
->ref
= gfc_copy_ref (expr
->ref
);
6604 /* Trim away the extraneous references that emerge from nested
6605 use of interface.c (extend_expr). */
6606 get_declared_from_expr (&class_ref
, NULL
, code
->expr1
, false);
6607 if (class_ref
&& class_ref
->next
)
6609 gfc_free_ref_list (class_ref
->next
);
6610 class_ref
->next
= NULL
;
6612 else if (code
->expr1
->ref
&& !class_ref
)
6614 gfc_free_ref_list (code
->expr1
->ref
);
6615 code
->expr1
->ref
= NULL
;
6618 /* Now use the procedure in the vtable. */
6619 gfc_add_vptr_component (code
->expr1
);
6620 gfc_add_component_ref (code
->expr1
, name
);
6621 code
->expr1
->value
.function
.esym
= NULL
;
6622 if (expr
->expr_type
!= EXPR_VARIABLE
)
6623 code
->expr1
->base_expr
= expr
;
6628 return resolve_typebound_call (code
, NULL
, NULL
);
6630 if (!resolve_ref (code
->expr1
))
6633 /* Get the CLASS declared type. */
6634 get_declared_from_expr (&class_ref
, &new_ref
, code
->expr1
, true);
6636 /* Weed out cases of the ultimate component being a derived type. */
6637 if ((class_ref
&& gfc_bt_struct (class_ref
->u
.c
.component
->ts
.type
))
6638 || (!class_ref
&& st
->n
.sym
->ts
.type
!= BT_CLASS
))
6640 gfc_free_ref_list (new_ref
);
6641 return resolve_typebound_call (code
, NULL
, NULL
);
6644 if (!resolve_typebound_call (code
, &name
, &overridable
))
6646 gfc_free_ref_list (new_ref
);
6649 ts
= code
->expr1
->ts
;
6653 /* Convert the expression to a procedure pointer component call. */
6654 code
->expr1
->value
.function
.esym
= NULL
;
6655 code
->expr1
->symtree
= st
;
6658 code
->expr1
->ref
= new_ref
;
6660 /* '_vptr' points to the vtab, which contains the procedure pointers. */
6661 gfc_add_vptr_component (code
->expr1
);
6662 gfc_add_component_ref (code
->expr1
, name
);
6664 /* Recover the typespec for the expression. This is really only
6665 necessary for generic procedures, where the additional call
6666 to gfc_add_component_ref seems to throw the collection of the
6667 correct typespec. */
6668 code
->expr1
->ts
= ts
;
6671 gfc_free_ref_list (new_ref
);
6677 /* Resolve a CALL to a Procedure Pointer Component (Subroutine). */
6680 resolve_ppc_call (gfc_code
* c
)
6682 gfc_component
*comp
;
6684 comp
= gfc_get_proc_ptr_comp (c
->expr1
);
6685 gcc_assert (comp
!= NULL
);
6687 c
->resolved_sym
= c
->expr1
->symtree
->n
.sym
;
6688 c
->expr1
->expr_type
= EXPR_VARIABLE
;
6690 if (!comp
->attr
.subroutine
)
6691 gfc_add_subroutine (&comp
->attr
, comp
->name
, &c
->expr1
->where
);
6693 if (!resolve_ref (c
->expr1
))
6696 if (!update_ppc_arglist (c
->expr1
))
6699 c
->ext
.actual
= c
->expr1
->value
.compcall
.actual
;
6701 if (!resolve_actual_arglist (c
->ext
.actual
, comp
->attr
.proc
,
6702 !(comp
->ts
.interface
6703 && comp
->ts
.interface
->formal
)))
6706 if (!pure_subroutine (comp
->ts
.interface
, comp
->name
, &c
->expr1
->where
))
6709 gfc_ppc_use (comp
, &c
->expr1
->value
.compcall
.actual
, &c
->expr1
->where
);
6715 /* Resolve a Function Call to a Procedure Pointer Component (Function). */
6718 resolve_expr_ppc (gfc_expr
* e
)
6720 gfc_component
*comp
;
6722 comp
= gfc_get_proc_ptr_comp (e
);
6723 gcc_assert (comp
!= NULL
);
6725 /* Convert to EXPR_FUNCTION. */
6726 e
->expr_type
= EXPR_FUNCTION
;
6727 e
->value
.function
.isym
= NULL
;
6728 e
->value
.function
.actual
= e
->value
.compcall
.actual
;
6730 if (comp
->as
!= NULL
)
6731 e
->rank
= comp
->as
->rank
;
6733 if (!comp
->attr
.function
)
6734 gfc_add_function (&comp
->attr
, comp
->name
, &e
->where
);
6736 if (!resolve_ref (e
))
6739 if (!resolve_actual_arglist (e
->value
.function
.actual
, comp
->attr
.proc
,
6740 !(comp
->ts
.interface
6741 && comp
->ts
.interface
->formal
)))
6744 if (!update_ppc_arglist (e
))
6747 if (!check_pure_function(e
))
6750 gfc_ppc_use (comp
, &e
->value
.compcall
.actual
, &e
->where
);
6757 gfc_is_expandable_expr (gfc_expr
*e
)
6759 gfc_constructor
*con
;
6761 if (e
->expr_type
== EXPR_ARRAY
)
6763 /* Traverse the constructor looking for variables that are flavor
6764 parameter. Parameters must be expanded since they are fully used at
6766 con
= gfc_constructor_first (e
->value
.constructor
);
6767 for (; con
; con
= gfc_constructor_next (con
))
6769 if (con
->expr
->expr_type
== EXPR_VARIABLE
6770 && con
->expr
->symtree
6771 && (con
->expr
->symtree
->n
.sym
->attr
.flavor
== FL_PARAMETER
6772 || con
->expr
->symtree
->n
.sym
->attr
.flavor
== FL_VARIABLE
))
6774 if (con
->expr
->expr_type
== EXPR_ARRAY
6775 && gfc_is_expandable_expr (con
->expr
))
6784 /* Sometimes variables in specification expressions of the result
6785 of module procedures in submodules wind up not being the 'real'
6786 dummy. Find this, if possible, in the namespace of the first
6790 fixup_unique_dummy (gfc_expr
*e
)
6792 gfc_symtree
*st
= NULL
;
6793 gfc_symbol
*s
= NULL
;
6795 if (e
->symtree
->n
.sym
->ns
->proc_name
6796 && e
->symtree
->n
.sym
->ns
->proc_name
->formal
)
6797 s
= e
->symtree
->n
.sym
->ns
->proc_name
->formal
->sym
;
6800 st
= gfc_find_symtree (s
->ns
->sym_root
, e
->symtree
->n
.sym
->name
);
6803 && st
->n
.sym
!= NULL
6804 && st
->n
.sym
->attr
.dummy
)
6808 /* Resolve an expression. That is, make sure that types of operands agree
6809 with their operators, intrinsic operators are converted to function calls
6810 for overloaded types and unresolved function references are resolved. */
6813 gfc_resolve_expr (gfc_expr
*e
)
6816 bool inquiry_save
, actual_arg_save
, first_actual_arg_save
;
6821 /* inquiry_argument only applies to variables. */
6822 inquiry_save
= inquiry_argument
;
6823 actual_arg_save
= actual_arg
;
6824 first_actual_arg_save
= first_actual_arg
;
6826 if (e
->expr_type
!= EXPR_VARIABLE
)
6828 inquiry_argument
= false;
6830 first_actual_arg
= false;
6832 else if (e
->symtree
!= NULL
6833 && *e
->symtree
->name
== '@'
6834 && e
->symtree
->n
.sym
->attr
.dummy
)
6836 /* Deal with submodule specification expressions that are not
6837 found to be referenced in module.c(read_cleanup). */
6838 fixup_unique_dummy (e
);
6841 switch (e
->expr_type
)
6844 t
= resolve_operator (e
);
6850 if (check_host_association (e
))
6851 t
= resolve_function (e
);
6853 t
= resolve_variable (e
);
6855 if (e
->ts
.type
== BT_CHARACTER
&& e
->ts
.u
.cl
== NULL
&& e
->ref
6856 && e
->ref
->type
!= REF_SUBSTRING
)
6857 gfc_resolve_substring_charlen (e
);
6862 t
= resolve_typebound_function (e
);
6865 case EXPR_SUBSTRING
:
6866 t
= resolve_ref (e
);
6875 t
= resolve_expr_ppc (e
);
6880 if (!resolve_ref (e
))
6883 t
= gfc_resolve_array_constructor (e
);
6884 /* Also try to expand a constructor. */
6887 expression_rank (e
);
6888 if (gfc_is_constant_expr (e
) || gfc_is_expandable_expr (e
))
6889 gfc_expand_constructor (e
, false);
6892 /* This provides the opportunity for the length of constructors with
6893 character valued function elements to propagate the string length
6894 to the expression. */
6895 if (t
&& e
->ts
.type
== BT_CHARACTER
)
6897 /* For efficiency, we call gfc_expand_constructor for BT_CHARACTER
6898 here rather then add a duplicate test for it above. */
6899 gfc_expand_constructor (e
, false);
6900 t
= gfc_resolve_character_array_constructor (e
);
6905 case EXPR_STRUCTURE
:
6906 t
= resolve_ref (e
);
6910 t
= resolve_structure_cons (e
, 0);
6914 t
= gfc_simplify_expr (e
, 0);
6918 gfc_internal_error ("gfc_resolve_expr(): Bad expression type");
6921 if (e
->ts
.type
== BT_CHARACTER
&& t
&& !e
->ts
.u
.cl
)
6924 inquiry_argument
= inquiry_save
;
6925 actual_arg
= actual_arg_save
;
6926 first_actual_arg
= first_actual_arg_save
;
6932 /* Resolve an expression from an iterator. They must be scalar and have
6933 INTEGER or (optionally) REAL type. */
6936 gfc_resolve_iterator_expr (gfc_expr
*expr
, bool real_ok
,
6937 const char *name_msgid
)
6939 if (!gfc_resolve_expr (expr
))
6942 if (expr
->rank
!= 0)
6944 gfc_error ("%s at %L must be a scalar", _(name_msgid
), &expr
->where
);
6948 if (expr
->ts
.type
!= BT_INTEGER
)
6950 if (expr
->ts
.type
== BT_REAL
)
6953 return gfc_notify_std (GFC_STD_F95_DEL
,
6954 "%s at %L must be integer",
6955 _(name_msgid
), &expr
->where
);
6958 gfc_error ("%s at %L must be INTEGER", _(name_msgid
),
6965 gfc_error ("%s at %L must be INTEGER", _(name_msgid
), &expr
->where
);
6973 /* Resolve the expressions in an iterator structure. If REAL_OK is
6974 false allow only INTEGER type iterators, otherwise allow REAL types.
6975 Set own_scope to true for ac-implied-do and data-implied-do as those
6976 have a separate scope such that, e.g., a INTENT(IN) doesn't apply. */
6979 gfc_resolve_iterator (gfc_iterator
*iter
, bool real_ok
, bool own_scope
)
6981 if (!gfc_resolve_iterator_expr (iter
->var
, real_ok
, "Loop variable"))
6984 if (!gfc_check_vardef_context (iter
->var
, false, false, own_scope
,
6985 _("iterator variable")))
6988 if (!gfc_resolve_iterator_expr (iter
->start
, real_ok
,
6989 "Start expression in DO loop"))
6992 if (!gfc_resolve_iterator_expr (iter
->end
, real_ok
,
6993 "End expression in DO loop"))
6996 if (!gfc_resolve_iterator_expr (iter
->step
, real_ok
,
6997 "Step expression in DO loop"))
7000 if (iter
->step
->expr_type
== EXPR_CONSTANT
)
7002 if ((iter
->step
->ts
.type
== BT_INTEGER
7003 && mpz_cmp_ui (iter
->step
->value
.integer
, 0) == 0)
7004 || (iter
->step
->ts
.type
== BT_REAL
7005 && mpfr_sgn (iter
->step
->value
.real
) == 0))
7007 gfc_error ("Step expression in DO loop at %L cannot be zero",
7008 &iter
->step
->where
);
7013 /* Convert start, end, and step to the same type as var. */
7014 if (iter
->start
->ts
.kind
!= iter
->var
->ts
.kind
7015 || iter
->start
->ts
.type
!= iter
->var
->ts
.type
)
7016 gfc_convert_type (iter
->start
, &iter
->var
->ts
, 1);
7018 if (iter
->end
->ts
.kind
!= iter
->var
->ts
.kind
7019 || iter
->end
->ts
.type
!= iter
->var
->ts
.type
)
7020 gfc_convert_type (iter
->end
, &iter
->var
->ts
, 1);
7022 if (iter
->step
->ts
.kind
!= iter
->var
->ts
.kind
7023 || iter
->step
->ts
.type
!= iter
->var
->ts
.type
)
7024 gfc_convert_type (iter
->step
, &iter
->var
->ts
, 1);
7026 if (iter
->start
->expr_type
== EXPR_CONSTANT
7027 && iter
->end
->expr_type
== EXPR_CONSTANT
7028 && iter
->step
->expr_type
== EXPR_CONSTANT
)
7031 if (iter
->start
->ts
.type
== BT_INTEGER
)
7033 sgn
= mpz_cmp_ui (iter
->step
->value
.integer
, 0);
7034 cmp
= mpz_cmp (iter
->end
->value
.integer
, iter
->start
->value
.integer
);
7038 sgn
= mpfr_sgn (iter
->step
->value
.real
);
7039 cmp
= mpfr_cmp (iter
->end
->value
.real
, iter
->start
->value
.real
);
7041 if (warn_zerotrip
&& ((sgn
> 0 && cmp
< 0) || (sgn
< 0 && cmp
> 0)))
7042 gfc_warning (OPT_Wzerotrip
,
7043 "DO loop at %L will be executed zero times",
7044 &iter
->step
->where
);
7047 if (iter
->end
->expr_type
== EXPR_CONSTANT
7048 && iter
->end
->ts
.type
== BT_INTEGER
7049 && iter
->step
->expr_type
== EXPR_CONSTANT
7050 && iter
->step
->ts
.type
== BT_INTEGER
7051 && (mpz_cmp_si (iter
->step
->value
.integer
, -1L) == 0
7052 || mpz_cmp_si (iter
->step
->value
.integer
, 1L) == 0))
7054 bool is_step_positive
= mpz_cmp_ui (iter
->step
->value
.integer
, 1) == 0;
7055 int k
= gfc_validate_kind (BT_INTEGER
, iter
->end
->ts
.kind
, false);
7057 if (is_step_positive
7058 && mpz_cmp (iter
->end
->value
.integer
, gfc_integer_kinds
[k
].huge
) == 0)
7059 gfc_warning (OPT_Wundefined_do_loop
,
7060 "DO loop at %L is undefined as it overflows",
7061 &iter
->step
->where
);
7062 else if (!is_step_positive
7063 && mpz_cmp (iter
->end
->value
.integer
,
7064 gfc_integer_kinds
[k
].min_int
) == 0)
7065 gfc_warning (OPT_Wundefined_do_loop
,
7066 "DO loop at %L is undefined as it underflows",
7067 &iter
->step
->where
);
7074 /* Traversal function for find_forall_index. f == 2 signals that
7075 that variable itself is not to be checked - only the references. */
7078 forall_index (gfc_expr
*expr
, gfc_symbol
*sym
, int *f
)
7080 if (expr
->expr_type
!= EXPR_VARIABLE
)
7083 /* A scalar assignment */
7084 if (!expr
->ref
|| *f
== 1)
7086 if (expr
->symtree
->n
.sym
== sym
)
7098 /* Check whether the FORALL index appears in the expression or not.
7099 Returns true if SYM is found in EXPR. */
7102 find_forall_index (gfc_expr
*expr
, gfc_symbol
*sym
, int f
)
7104 if (gfc_traverse_expr (expr
, sym
, forall_index
, f
))
7111 /* Resolve a list of FORALL iterators. The FORALL index-name is constrained
7112 to be a scalar INTEGER variable. The subscripts and stride are scalar
7113 INTEGERs, and if stride is a constant it must be nonzero.
7114 Furthermore "A subscript or stride in a forall-triplet-spec shall
7115 not contain a reference to any index-name in the
7116 forall-triplet-spec-list in which it appears." (7.5.4.1) */
7119 resolve_forall_iterators (gfc_forall_iterator
*it
)
7121 gfc_forall_iterator
*iter
, *iter2
;
7123 for (iter
= it
; iter
; iter
= iter
->next
)
7125 if (gfc_resolve_expr (iter
->var
)
7126 && (iter
->var
->ts
.type
!= BT_INTEGER
|| iter
->var
->rank
!= 0))
7127 gfc_error ("FORALL index-name at %L must be a scalar INTEGER",
7130 if (gfc_resolve_expr (iter
->start
)
7131 && (iter
->start
->ts
.type
!= BT_INTEGER
|| iter
->start
->rank
!= 0))
7132 gfc_error ("FORALL start expression at %L must be a scalar INTEGER",
7133 &iter
->start
->where
);
7134 if (iter
->var
->ts
.kind
!= iter
->start
->ts
.kind
)
7135 gfc_convert_type (iter
->start
, &iter
->var
->ts
, 1);
7137 if (gfc_resolve_expr (iter
->end
)
7138 && (iter
->end
->ts
.type
!= BT_INTEGER
|| iter
->end
->rank
!= 0))
7139 gfc_error ("FORALL end expression at %L must be a scalar INTEGER",
7141 if (iter
->var
->ts
.kind
!= iter
->end
->ts
.kind
)
7142 gfc_convert_type (iter
->end
, &iter
->var
->ts
, 1);
7144 if (gfc_resolve_expr (iter
->stride
))
7146 if (iter
->stride
->ts
.type
!= BT_INTEGER
|| iter
->stride
->rank
!= 0)
7147 gfc_error ("FORALL stride expression at %L must be a scalar %s",
7148 &iter
->stride
->where
, "INTEGER");
7150 if (iter
->stride
->expr_type
== EXPR_CONSTANT
7151 && mpz_cmp_ui (iter
->stride
->value
.integer
, 0) == 0)
7152 gfc_error ("FORALL stride expression at %L cannot be zero",
7153 &iter
->stride
->where
);
7155 if (iter
->var
->ts
.kind
!= iter
->stride
->ts
.kind
)
7156 gfc_convert_type (iter
->stride
, &iter
->var
->ts
, 1);
7159 for (iter
= it
; iter
; iter
= iter
->next
)
7160 for (iter2
= iter
; iter2
; iter2
= iter2
->next
)
7162 if (find_forall_index (iter2
->start
, iter
->var
->symtree
->n
.sym
, 0)
7163 || find_forall_index (iter2
->end
, iter
->var
->symtree
->n
.sym
, 0)
7164 || find_forall_index (iter2
->stride
, iter
->var
->symtree
->n
.sym
, 0))
7165 gfc_error ("FORALL index %qs may not appear in triplet "
7166 "specification at %L", iter
->var
->symtree
->name
,
7167 &iter2
->start
->where
);
7172 /* Given a pointer to a symbol that is a derived type, see if it's
7173 inaccessible, i.e. if it's defined in another module and the components are
7174 PRIVATE. The search is recursive if necessary. Returns zero if no
7175 inaccessible components are found, nonzero otherwise. */
7178 derived_inaccessible (gfc_symbol
*sym
)
7182 if (sym
->attr
.use_assoc
&& sym
->attr
.private_comp
)
7185 for (c
= sym
->components
; c
; c
= c
->next
)
7187 /* Prevent an infinite loop through this function. */
7188 if (c
->ts
.type
== BT_DERIVED
&& c
->attr
.pointer
7189 && sym
== c
->ts
.u
.derived
)
7192 if (c
->ts
.type
== BT_DERIVED
&& derived_inaccessible (c
->ts
.u
.derived
))
7200 /* Resolve the argument of a deallocate expression. The expression must be
7201 a pointer or a full array. */
7204 resolve_deallocate_expr (gfc_expr
*e
)
7206 symbol_attribute attr
;
7207 int allocatable
, pointer
;
7213 if (!gfc_resolve_expr (e
))
7216 if (e
->expr_type
!= EXPR_VARIABLE
)
7219 sym
= e
->symtree
->n
.sym
;
7220 unlimited
= UNLIMITED_POLY(sym
);
7222 if (sym
->ts
.type
== BT_CLASS
)
7224 allocatable
= CLASS_DATA (sym
)->attr
.allocatable
;
7225 pointer
= CLASS_DATA (sym
)->attr
.class_pointer
;
7229 allocatable
= sym
->attr
.allocatable
;
7230 pointer
= sym
->attr
.pointer
;
7232 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
7237 if (ref
->u
.ar
.type
!= AR_FULL
7238 && !(ref
->u
.ar
.type
== AR_ELEMENT
&& ref
->u
.ar
.as
->rank
== 0
7239 && ref
->u
.ar
.codimen
&& gfc_ref_this_image (ref
)))
7244 c
= ref
->u
.c
.component
;
7245 if (c
->ts
.type
== BT_CLASS
)
7247 allocatable
= CLASS_DATA (c
)->attr
.allocatable
;
7248 pointer
= CLASS_DATA (c
)->attr
.class_pointer
;
7252 allocatable
= c
->attr
.allocatable
;
7253 pointer
= c
->attr
.pointer
;
7264 attr
= gfc_expr_attr (e
);
7266 if (allocatable
== 0 && attr
.pointer
== 0 && !unlimited
)
7269 gfc_error ("Allocate-object at %L must be ALLOCATABLE or a POINTER",
7275 if (gfc_is_coindexed (e
))
7277 gfc_error ("Coindexed allocatable object at %L", &e
->where
);
7282 && !gfc_check_vardef_context (e
, true, true, false,
7283 _("DEALLOCATE object")))
7285 if (!gfc_check_vardef_context (e
, false, true, false,
7286 _("DEALLOCATE object")))
7293 /* Returns true if the expression e contains a reference to the symbol sym. */
7295 sym_in_expr (gfc_expr
*e
, gfc_symbol
*sym
, int *f ATTRIBUTE_UNUSED
)
7297 if (e
->expr_type
== EXPR_VARIABLE
&& e
->symtree
->n
.sym
== sym
)
7304 gfc_find_sym_in_expr (gfc_symbol
*sym
, gfc_expr
*e
)
7306 return gfc_traverse_expr (e
, sym
, sym_in_expr
, 0);
7310 /* Given the expression node e for an allocatable/pointer of derived type to be
7311 allocated, get the expression node to be initialized afterwards (needed for
7312 derived types with default initializers, and derived types with allocatable
7313 components that need nullification.) */
7316 gfc_expr_to_initialize (gfc_expr
*e
)
7322 result
= gfc_copy_expr (e
);
7324 /* Change the last array reference from AR_ELEMENT to AR_FULL. */
7325 for (ref
= result
->ref
; ref
; ref
= ref
->next
)
7326 if (ref
->type
== REF_ARRAY
&& ref
->next
== NULL
)
7328 ref
->u
.ar
.type
= AR_FULL
;
7330 for (i
= 0; i
< ref
->u
.ar
.dimen
; i
++)
7331 ref
->u
.ar
.start
[i
] = ref
->u
.ar
.end
[i
] = ref
->u
.ar
.stride
[i
] = NULL
;
7336 gfc_free_shape (&result
->shape
, result
->rank
);
7338 /* Recalculate rank, shape, etc. */
7339 gfc_resolve_expr (result
);
7344 /* If the last ref of an expression is an array ref, return a copy of the
7345 expression with that one removed. Otherwise, a copy of the original
7346 expression. This is used for allocate-expressions and pointer assignment
7347 LHS, where there may be an array specification that needs to be stripped
7348 off when using gfc_check_vardef_context. */
7351 remove_last_array_ref (gfc_expr
* e
)
7356 e2
= gfc_copy_expr (e
);
7357 for (r
= &e2
->ref
; *r
; r
= &(*r
)->next
)
7358 if ((*r
)->type
== REF_ARRAY
&& !(*r
)->next
)
7360 gfc_free_ref_list (*r
);
7369 /* Used in resolve_allocate_expr to check that a allocation-object and
7370 a source-expr are conformable. This does not catch all possible
7371 cases; in particular a runtime checking is needed. */
7374 conformable_arrays (gfc_expr
*e1
, gfc_expr
*e2
)
7377 for (tail
= e2
->ref
; tail
&& tail
->next
; tail
= tail
->next
);
7379 /* First compare rank. */
7380 if ((tail
&& e1
->rank
!= tail
->u
.ar
.as
->rank
)
7381 || (!tail
&& e1
->rank
!= e2
->rank
))
7383 gfc_error ("Source-expr at %L must be scalar or have the "
7384 "same rank as the allocate-object at %L",
7385 &e1
->where
, &e2
->where
);
7396 for (i
= 0; i
< e1
->rank
; i
++)
7398 if (tail
->u
.ar
.start
[i
] == NULL
)
7401 if (tail
->u
.ar
.end
[i
])
7403 mpz_set (s
, tail
->u
.ar
.end
[i
]->value
.integer
);
7404 mpz_sub (s
, s
, tail
->u
.ar
.start
[i
]->value
.integer
);
7405 mpz_add_ui (s
, s
, 1);
7409 mpz_set (s
, tail
->u
.ar
.start
[i
]->value
.integer
);
7412 if (mpz_cmp (e1
->shape
[i
], s
) != 0)
7414 gfc_error ("Source-expr at %L and allocate-object at %L must "
7415 "have the same shape", &e1
->where
, &e2
->where
);
7428 /* Resolve the expression in an ALLOCATE statement, doing the additional
7429 checks to see whether the expression is OK or not. The expression must
7430 have a trailing array reference that gives the size of the array. */
7433 resolve_allocate_expr (gfc_expr
*e
, gfc_code
*code
, bool *array_alloc_wo_spec
)
7435 int i
, pointer
, allocatable
, dimension
, is_abstract
;
7439 symbol_attribute attr
;
7440 gfc_ref
*ref
, *ref2
;
7443 gfc_symbol
*sym
= NULL
;
7448 /* Mark the utmost array component as being in allocate to allow DIMEN_STAR
7449 checking of coarrays. */
7450 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
7451 if (ref
->next
== NULL
)
7454 if (ref
&& ref
->type
== REF_ARRAY
)
7455 ref
->u
.ar
.in_allocate
= true;
7457 if (!gfc_resolve_expr (e
))
7460 /* Make sure the expression is allocatable or a pointer. If it is
7461 pointer, the next-to-last reference must be a pointer. */
7465 sym
= e
->symtree
->n
.sym
;
7467 /* Check whether ultimate component is abstract and CLASS. */
7470 /* Is the allocate-object unlimited polymorphic? */
7471 unlimited
= UNLIMITED_POLY(e
);
7473 if (e
->expr_type
!= EXPR_VARIABLE
)
7476 attr
= gfc_expr_attr (e
);
7477 pointer
= attr
.pointer
;
7478 dimension
= attr
.dimension
;
7479 codimension
= attr
.codimension
;
7483 if (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
))
7485 allocatable
= CLASS_DATA (sym
)->attr
.allocatable
;
7486 pointer
= CLASS_DATA (sym
)->attr
.class_pointer
;
7487 dimension
= CLASS_DATA (sym
)->attr
.dimension
;
7488 codimension
= CLASS_DATA (sym
)->attr
.codimension
;
7489 is_abstract
= CLASS_DATA (sym
)->attr
.abstract
;
7493 allocatable
= sym
->attr
.allocatable
;
7494 pointer
= sym
->attr
.pointer
;
7495 dimension
= sym
->attr
.dimension
;
7496 codimension
= sym
->attr
.codimension
;
7501 for (ref
= e
->ref
; ref
; ref2
= ref
, ref
= ref
->next
)
7506 if (ref
->u
.ar
.codimen
> 0)
7509 for (n
= ref
->u
.ar
.dimen
;
7510 n
< ref
->u
.ar
.dimen
+ ref
->u
.ar
.codimen
; n
++)
7511 if (ref
->u
.ar
.dimen_type
[n
] != DIMEN_THIS_IMAGE
)
7518 if (ref
->next
!= NULL
)
7526 gfc_error ("Coindexed allocatable object at %L",
7531 c
= ref
->u
.c
.component
;
7532 if (c
->ts
.type
== BT_CLASS
)
7534 allocatable
= CLASS_DATA (c
)->attr
.allocatable
;
7535 pointer
= CLASS_DATA (c
)->attr
.class_pointer
;
7536 dimension
= CLASS_DATA (c
)->attr
.dimension
;
7537 codimension
= CLASS_DATA (c
)->attr
.codimension
;
7538 is_abstract
= CLASS_DATA (c
)->attr
.abstract
;
7542 allocatable
= c
->attr
.allocatable
;
7543 pointer
= c
->attr
.pointer
;
7544 dimension
= c
->attr
.dimension
;
7545 codimension
= c
->attr
.codimension
;
7546 is_abstract
= c
->attr
.abstract
;
7559 /* Check for F08:C628. */
7560 if (allocatable
== 0 && pointer
== 0 && !unlimited
)
7562 gfc_error ("Allocate-object at %L must be ALLOCATABLE or a POINTER",
7567 /* Some checks for the SOURCE tag. */
7570 /* Check F03:C631. */
7571 if (!gfc_type_compatible (&e
->ts
, &code
->expr3
->ts
))
7573 gfc_error ("Type of entity at %L is type incompatible with "
7574 "source-expr at %L", &e
->where
, &code
->expr3
->where
);
7578 /* Check F03:C632 and restriction following Note 6.18. */
7579 if (code
->expr3
->rank
> 0 && !conformable_arrays (code
->expr3
, e
))
7582 /* Check F03:C633. */
7583 if (code
->expr3
->ts
.kind
!= e
->ts
.kind
&& !unlimited
)
7585 gfc_error ("The allocate-object at %L and the source-expr at %L "
7586 "shall have the same kind type parameter",
7587 &e
->where
, &code
->expr3
->where
);
7591 /* Check F2008, C642. */
7592 if (code
->expr3
->ts
.type
== BT_DERIVED
7593 && ((codimension
&& gfc_expr_attr (code
->expr3
).lock_comp
)
7594 || (code
->expr3
->ts
.u
.derived
->from_intmod
7595 == INTMOD_ISO_FORTRAN_ENV
7596 && code
->expr3
->ts
.u
.derived
->intmod_sym_id
7597 == ISOFORTRAN_LOCK_TYPE
)))
7599 gfc_error ("The source-expr at %L shall neither be of type "
7600 "LOCK_TYPE nor have a LOCK_TYPE component if "
7601 "allocate-object at %L is a coarray",
7602 &code
->expr3
->where
, &e
->where
);
7606 /* Check TS18508, C702/C703. */
7607 if (code
->expr3
->ts
.type
== BT_DERIVED
7608 && ((codimension
&& gfc_expr_attr (code
->expr3
).event_comp
)
7609 || (code
->expr3
->ts
.u
.derived
->from_intmod
7610 == INTMOD_ISO_FORTRAN_ENV
7611 && code
->expr3
->ts
.u
.derived
->intmod_sym_id
7612 == ISOFORTRAN_EVENT_TYPE
)))
7614 gfc_error ("The source-expr at %L shall neither be of type "
7615 "EVENT_TYPE nor have a EVENT_TYPE component if "
7616 "allocate-object at %L is a coarray",
7617 &code
->expr3
->where
, &e
->where
);
7622 /* Check F08:C629. */
7623 if (is_abstract
&& code
->ext
.alloc
.ts
.type
== BT_UNKNOWN
7626 gcc_assert (e
->ts
.type
== BT_CLASS
);
7627 gfc_error ("Allocating %s of ABSTRACT base type at %L requires a "
7628 "type-spec or source-expr", sym
->name
, &e
->where
);
7632 /* Check F08:C632. */
7633 if (code
->ext
.alloc
.ts
.type
== BT_CHARACTER
&& !e
->ts
.deferred
7634 && !UNLIMITED_POLY (e
))
7638 if (!e
->ts
.u
.cl
->length
)
7641 cmp
= gfc_dep_compare_expr (e
->ts
.u
.cl
->length
,
7642 code
->ext
.alloc
.ts
.u
.cl
->length
);
7643 if (cmp
== 1 || cmp
== -1 || cmp
== -3)
7645 gfc_error ("Allocating %s at %L with type-spec requires the same "
7646 "character-length parameter as in the declaration",
7647 sym
->name
, &e
->where
);
7652 /* In the variable definition context checks, gfc_expr_attr is used
7653 on the expression. This is fooled by the array specification
7654 present in e, thus we have to eliminate that one temporarily. */
7655 e2
= remove_last_array_ref (e
);
7658 t
= gfc_check_vardef_context (e2
, true, true, false,
7659 _("ALLOCATE object"));
7661 t
= gfc_check_vardef_context (e2
, false, true, false,
7662 _("ALLOCATE object"));
7667 if (e
->ts
.type
== BT_CLASS
&& CLASS_DATA (e
)->attr
.dimension
7668 && !code
->expr3
&& code
->ext
.alloc
.ts
.type
== BT_DERIVED
)
7670 /* For class arrays, the initialization with SOURCE is done
7671 using _copy and trans_call. It is convenient to exploit that
7672 when the allocated type is different from the declared type but
7673 no SOURCE exists by setting expr3. */
7674 code
->expr3
= gfc_default_initializer (&code
->ext
.alloc
.ts
);
7676 else if (flag_coarray
!= GFC_FCOARRAY_LIB
&& e
->ts
.type
== BT_DERIVED
7677 && e
->ts
.u
.derived
->from_intmod
== INTMOD_ISO_FORTRAN_ENV
7678 && e
->ts
.u
.derived
->intmod_sym_id
== ISOFORTRAN_EVENT_TYPE
)
7680 /* We have to zero initialize the integer variable. */
7681 code
->expr3
= gfc_get_int_expr (gfc_default_integer_kind
, &e
->where
, 0);
7684 if (e
->ts
.type
== BT_CLASS
&& !unlimited
&& !UNLIMITED_POLY (code
->expr3
))
7686 /* Make sure the vtab symbol is present when
7687 the module variables are generated. */
7688 gfc_typespec ts
= e
->ts
;
7690 ts
= code
->expr3
->ts
;
7691 else if (code
->ext
.alloc
.ts
.type
== BT_DERIVED
)
7692 ts
= code
->ext
.alloc
.ts
;
7694 /* Finding the vtab also publishes the type's symbol. Therefore this
7695 statement is necessary. */
7696 gfc_find_derived_vtab (ts
.u
.derived
);
7698 else if (unlimited
&& !UNLIMITED_POLY (code
->expr3
))
7700 /* Again, make sure the vtab symbol is present when
7701 the module variables are generated. */
7702 gfc_typespec
*ts
= NULL
;
7704 ts
= &code
->expr3
->ts
;
7706 ts
= &code
->ext
.alloc
.ts
;
7710 /* Finding the vtab also publishes the type's symbol. Therefore this
7711 statement is necessary. */
7715 if (dimension
== 0 && codimension
== 0)
7718 /* Make sure the last reference node is an array specification. */
7720 if (!ref2
|| ref2
->type
!= REF_ARRAY
|| ref2
->u
.ar
.type
== AR_FULL
7721 || (dimension
&& ref2
->u
.ar
.dimen
== 0))
7726 if (!gfc_notify_std (GFC_STD_F2008
, "Array specification required "
7727 "in ALLOCATE statement at %L", &e
->where
))
7729 if (code
->expr3
->rank
!= 0)
7730 *array_alloc_wo_spec
= true;
7733 gfc_error ("Array specification or array-valued SOURCE= "
7734 "expression required in ALLOCATE statement at %L",
7741 gfc_error ("Array specification required in ALLOCATE statement "
7742 "at %L", &e
->where
);
7747 /* Make sure that the array section reference makes sense in the
7748 context of an ALLOCATE specification. */
7753 for (i
= ar
->dimen
; i
< ar
->dimen
+ ar
->codimen
; i
++)
7754 if (ar
->dimen_type
[i
] == DIMEN_THIS_IMAGE
)
7756 gfc_error ("Coarray specification required in ALLOCATE statement "
7757 "at %L", &e
->where
);
7761 for (i
= 0; i
< ar
->dimen
; i
++)
7763 if (ar
->type
== AR_ELEMENT
|| ar
->type
== AR_FULL
)
7766 switch (ar
->dimen_type
[i
])
7772 if (ar
->start
[i
] != NULL
7773 && ar
->end
[i
] != NULL
7774 && ar
->stride
[i
] == NULL
)
7782 case DIMEN_THIS_IMAGE
:
7783 gfc_error ("Bad array specification in ALLOCATE statement at %L",
7789 for (a
= code
->ext
.alloc
.list
; a
; a
= a
->next
)
7791 sym
= a
->expr
->symtree
->n
.sym
;
7793 /* TODO - check derived type components. */
7794 if (gfc_bt_struct (sym
->ts
.type
) || sym
->ts
.type
== BT_CLASS
)
7797 if ((ar
->start
[i
] != NULL
7798 && gfc_find_sym_in_expr (sym
, ar
->start
[i
]))
7799 || (ar
->end
[i
] != NULL
7800 && gfc_find_sym_in_expr (sym
, ar
->end
[i
])))
7802 gfc_error ("%qs must not appear in the array specification at "
7803 "%L in the same ALLOCATE statement where it is "
7804 "itself allocated", sym
->name
, &ar
->where
);
7810 for (i
= ar
->dimen
; i
< ar
->codimen
+ ar
->dimen
; i
++)
7812 if (ar
->dimen_type
[i
] == DIMEN_ELEMENT
7813 || ar
->dimen_type
[i
] == DIMEN_RANGE
)
7815 if (i
== (ar
->dimen
+ ar
->codimen
- 1))
7817 gfc_error ("Expected '*' in coindex specification in ALLOCATE "
7818 "statement at %L", &e
->where
);
7824 if (ar
->dimen_type
[i
] == DIMEN_STAR
&& i
== (ar
->dimen
+ ar
->codimen
- 1)
7825 && ar
->stride
[i
] == NULL
)
7828 gfc_error ("Bad coarray specification in ALLOCATE statement at %L",
7842 resolve_allocate_deallocate (gfc_code
*code
, const char *fcn
)
7844 gfc_expr
*stat
, *errmsg
, *pe
, *qe
;
7845 gfc_alloc
*a
, *p
, *q
;
7848 errmsg
= code
->expr2
;
7850 /* Check the stat variable. */
7853 gfc_check_vardef_context (stat
, false, false, false,
7854 _("STAT variable"));
7856 if ((stat
->ts
.type
!= BT_INTEGER
7857 && !(stat
->ref
&& (stat
->ref
->type
== REF_ARRAY
7858 || stat
->ref
->type
== REF_COMPONENT
)))
7860 gfc_error ("Stat-variable at %L must be a scalar INTEGER "
7861 "variable", &stat
->where
);
7863 for (p
= code
->ext
.alloc
.list
; p
; p
= p
->next
)
7864 if (p
->expr
->symtree
->n
.sym
->name
== stat
->symtree
->n
.sym
->name
)
7866 gfc_ref
*ref1
, *ref2
;
7869 for (ref1
= p
->expr
->ref
, ref2
= stat
->ref
; ref1
&& ref2
;
7870 ref1
= ref1
->next
, ref2
= ref2
->next
)
7872 if (ref1
->type
!= REF_COMPONENT
|| ref2
->type
!= REF_COMPONENT
)
7874 if (ref1
->u
.c
.component
->name
!= ref2
->u
.c
.component
->name
)
7883 gfc_error ("Stat-variable at %L shall not be %sd within "
7884 "the same %s statement", &stat
->where
, fcn
, fcn
);
7890 /* Check the errmsg variable. */
7894 gfc_warning (0, "ERRMSG at %L is useless without a STAT tag",
7897 gfc_check_vardef_context (errmsg
, false, false, false,
7898 _("ERRMSG variable"));
7900 /* F18:R928 alloc-opt is ERRMSG = errmsg-variable
7901 F18:R930 errmsg-variable is scalar-default-char-variable
7902 F18:R906 default-char-variable is variable
7903 F18:C906 default-char-variable shall be default character. */
7904 if ((errmsg
->ts
.type
!= BT_CHARACTER
7906 && (errmsg
->ref
->type
== REF_ARRAY
7907 || errmsg
->ref
->type
== REF_COMPONENT
)))
7909 || errmsg
->ts
.kind
!= gfc_default_character_kind
)
7910 gfc_error ("ERRMSG variable at %L shall be a scalar default CHARACTER "
7911 "variable", &errmsg
->where
);
7913 for (p
= code
->ext
.alloc
.list
; p
; p
= p
->next
)
7914 if (p
->expr
->symtree
->n
.sym
->name
== errmsg
->symtree
->n
.sym
->name
)
7916 gfc_ref
*ref1
, *ref2
;
7919 for (ref1
= p
->expr
->ref
, ref2
= errmsg
->ref
; ref1
&& ref2
;
7920 ref1
= ref1
->next
, ref2
= ref2
->next
)
7922 if (ref1
->type
!= REF_COMPONENT
|| ref2
->type
!= REF_COMPONENT
)
7924 if (ref1
->u
.c
.component
->name
!= ref2
->u
.c
.component
->name
)
7933 gfc_error ("Errmsg-variable at %L shall not be %sd within "
7934 "the same %s statement", &errmsg
->where
, fcn
, fcn
);
7940 /* Check that an allocate-object appears only once in the statement. */
7942 for (p
= code
->ext
.alloc
.list
; p
; p
= p
->next
)
7945 for (q
= p
->next
; q
; q
= q
->next
)
7948 if (pe
->symtree
->n
.sym
->name
== qe
->symtree
->n
.sym
->name
)
7950 /* This is a potential collision. */
7951 gfc_ref
*pr
= pe
->ref
;
7952 gfc_ref
*qr
= qe
->ref
;
7954 /* Follow the references until
7955 a) They start to differ, in which case there is no error;
7956 you can deallocate a%b and a%c in a single statement
7957 b) Both of them stop, which is an error
7958 c) One of them stops, which is also an error. */
7961 if (pr
== NULL
&& qr
== NULL
)
7963 gfc_error ("Allocate-object at %L also appears at %L",
7964 &pe
->where
, &qe
->where
);
7967 else if (pr
!= NULL
&& qr
== NULL
)
7969 gfc_error ("Allocate-object at %L is subobject of"
7970 " object at %L", &pe
->where
, &qe
->where
);
7973 else if (pr
== NULL
&& qr
!= NULL
)
7975 gfc_error ("Allocate-object at %L is subobject of"
7976 " object at %L", &qe
->where
, &pe
->where
);
7979 /* Here, pr != NULL && qr != NULL */
7980 gcc_assert(pr
->type
== qr
->type
);
7981 if (pr
->type
== REF_ARRAY
)
7983 /* Handle cases like allocate(v(3)%x(3), v(2)%x(3)),
7985 gcc_assert (qr
->type
== REF_ARRAY
);
7987 if (pr
->next
&& qr
->next
)
7990 gfc_array_ref
*par
= &(pr
->u
.ar
);
7991 gfc_array_ref
*qar
= &(qr
->u
.ar
);
7993 for (i
=0; i
<par
->dimen
; i
++)
7995 if ((par
->start
[i
] != NULL
7996 || qar
->start
[i
] != NULL
)
7997 && gfc_dep_compare_expr (par
->start
[i
],
7998 qar
->start
[i
]) != 0)
8005 if (pr
->u
.c
.component
->name
!= qr
->u
.c
.component
->name
)
8018 if (strcmp (fcn
, "ALLOCATE") == 0)
8020 bool arr_alloc_wo_spec
= false;
8022 /* Resolving the expr3 in the loop over all objects to allocate would
8023 execute loop invariant code for each loop item. Therefore do it just
8025 if (code
->expr3
&& code
->expr3
->mold
8026 && code
->expr3
->ts
.type
== BT_DERIVED
)
8028 /* Default initialization via MOLD (non-polymorphic). */
8029 gfc_expr
*rhs
= gfc_default_initializer (&code
->expr3
->ts
);
8032 gfc_resolve_expr (rhs
);
8033 gfc_free_expr (code
->expr3
);
8037 for (a
= code
->ext
.alloc
.list
; a
; a
= a
->next
)
8038 resolve_allocate_expr (a
->expr
, code
, &arr_alloc_wo_spec
);
8040 if (arr_alloc_wo_spec
&& code
->expr3
)
8042 /* Mark the allocate to have to take the array specification
8044 code
->ext
.alloc
.arr_spec_from_expr3
= 1;
8049 for (a
= code
->ext
.alloc
.list
; a
; a
= a
->next
)
8050 resolve_deallocate_expr (a
->expr
);
8055 /************ SELECT CASE resolution subroutines ************/
8057 /* Callback function for our mergesort variant. Determines interval
8058 overlaps for CASEs. Return <0 if op1 < op2, 0 for overlap, >0 for
8059 op1 > op2. Assumes we're not dealing with the default case.
8060 We have op1 = (:L), (K:L) or (K:) and op2 = (:N), (M:N) or (M:).
8061 There are nine situations to check. */
8064 compare_cases (const gfc_case
*op1
, const gfc_case
*op2
)
8068 if (op1
->low
== NULL
) /* op1 = (:L) */
8070 /* op2 = (:N), so overlap. */
8072 /* op2 = (M:) or (M:N), L < M */
8073 if (op2
->low
!= NULL
8074 && gfc_compare_expr (op1
->high
, op2
->low
, INTRINSIC_LT
) < 0)
8077 else if (op1
->high
== NULL
) /* op1 = (K:) */
8079 /* op2 = (M:), so overlap. */
8081 /* op2 = (:N) or (M:N), K > N */
8082 if (op2
->high
!= NULL
8083 && gfc_compare_expr (op1
->low
, op2
->high
, INTRINSIC_GT
) > 0)
8086 else /* op1 = (K:L) */
8088 if (op2
->low
== NULL
) /* op2 = (:N), K > N */
8089 retval
= (gfc_compare_expr (op1
->low
, op2
->high
, INTRINSIC_GT
) > 0)
8091 else if (op2
->high
== NULL
) /* op2 = (M:), L < M */
8092 retval
= (gfc_compare_expr (op1
->high
, op2
->low
, INTRINSIC_LT
) < 0)
8094 else /* op2 = (M:N) */
8098 if (gfc_compare_expr (op1
->high
, op2
->low
, INTRINSIC_LT
) < 0)
8101 else if (gfc_compare_expr (op1
->low
, op2
->high
, INTRINSIC_GT
) > 0)
8110 /* Merge-sort a double linked case list, detecting overlap in the
8111 process. LIST is the head of the double linked case list before it
8112 is sorted. Returns the head of the sorted list if we don't see any
8113 overlap, or NULL otherwise. */
8116 check_case_overlap (gfc_case
*list
)
8118 gfc_case
*p
, *q
, *e
, *tail
;
8119 int insize
, nmerges
, psize
, qsize
, cmp
, overlap_seen
;
8121 /* If the passed list was empty, return immediately. */
8128 /* Loop unconditionally. The only exit from this loop is a return
8129 statement, when we've finished sorting the case list. */
8136 /* Count the number of merges we do in this pass. */
8139 /* Loop while there exists a merge to be done. */
8144 /* Count this merge. */
8147 /* Cut the list in two pieces by stepping INSIZE places
8148 forward in the list, starting from P. */
8151 for (i
= 0; i
< insize
; i
++)
8160 /* Now we have two lists. Merge them! */
8161 while (psize
> 0 || (qsize
> 0 && q
!= NULL
))
8163 /* See from which the next case to merge comes from. */
8166 /* P is empty so the next case must come from Q. */
8171 else if (qsize
== 0 || q
== NULL
)
8180 cmp
= compare_cases (p
, q
);
8183 /* The whole case range for P is less than the
8191 /* The whole case range for Q is greater than
8192 the case range for P. */
8199 /* The cases overlap, or they are the same
8200 element in the list. Either way, we must
8201 issue an error and get the next case from P. */
8202 /* FIXME: Sort P and Q by line number. */
8203 gfc_error ("CASE label at %L overlaps with CASE "
8204 "label at %L", &p
->where
, &q
->where
);
8212 /* Add the next element to the merged list. */
8221 /* P has now stepped INSIZE places along, and so has Q. So
8222 they're the same. */
8227 /* If we have done only one merge or none at all, we've
8228 finished sorting the cases. */
8237 /* Otherwise repeat, merging lists twice the size. */
8243 /* Check to see if an expression is suitable for use in a CASE statement.
8244 Makes sure that all case expressions are scalar constants of the same
8245 type. Return false if anything is wrong. */
8248 validate_case_label_expr (gfc_expr
*e
, gfc_expr
*case_expr
)
8250 if (e
== NULL
) return true;
8252 if (e
->ts
.type
!= case_expr
->ts
.type
)
8254 gfc_error ("Expression in CASE statement at %L must be of type %s",
8255 &e
->where
, gfc_basic_typename (case_expr
->ts
.type
));
8259 /* C805 (R808) For a given case-construct, each case-value shall be of
8260 the same type as case-expr. For character type, length differences
8261 are allowed, but the kind type parameters shall be the same. */
8263 if (case_expr
->ts
.type
== BT_CHARACTER
&& e
->ts
.kind
!= case_expr
->ts
.kind
)
8265 gfc_error ("Expression in CASE statement at %L must be of kind %d",
8266 &e
->where
, case_expr
->ts
.kind
);
8270 /* Convert the case value kind to that of case expression kind,
8273 if (e
->ts
.kind
!= case_expr
->ts
.kind
)
8274 gfc_convert_type_warn (e
, &case_expr
->ts
, 2, 0);
8278 gfc_error ("Expression in CASE statement at %L must be scalar",
8287 /* Given a completely parsed select statement, we:
8289 - Validate all expressions and code within the SELECT.
8290 - Make sure that the selection expression is not of the wrong type.
8291 - Make sure that no case ranges overlap.
8292 - Eliminate unreachable cases and unreachable code resulting from
8293 removing case labels.
8295 The standard does allow unreachable cases, e.g. CASE (5:3). But
8296 they are a hassle for code generation, and to prevent that, we just
8297 cut them out here. This is not necessary for overlapping cases
8298 because they are illegal and we never even try to generate code.
8300 We have the additional caveat that a SELECT construct could have
8301 been a computed GOTO in the source code. Fortunately we can fairly
8302 easily work around that here: The case_expr for a "real" SELECT CASE
8303 is in code->expr1, but for a computed GOTO it is in code->expr2. All
8304 we have to do is make sure that the case_expr is a scalar integer
8308 resolve_select (gfc_code
*code
, bool select_type
)
8311 gfc_expr
*case_expr
;
8312 gfc_case
*cp
, *default_case
, *tail
, *head
;
8313 int seen_unreachable
;
8319 if (code
->expr1
== NULL
)
8321 /* This was actually a computed GOTO statement. */
8322 case_expr
= code
->expr2
;
8323 if (case_expr
->ts
.type
!= BT_INTEGER
|| case_expr
->rank
!= 0)
8324 gfc_error ("Selection expression in computed GOTO statement "
8325 "at %L must be a scalar integer expression",
8328 /* Further checking is not necessary because this SELECT was built
8329 by the compiler, so it should always be OK. Just move the
8330 case_expr from expr2 to expr so that we can handle computed
8331 GOTOs as normal SELECTs from here on. */
8332 code
->expr1
= code
->expr2
;
8337 case_expr
= code
->expr1
;
8338 type
= case_expr
->ts
.type
;
8341 if (type
!= BT_LOGICAL
&& type
!= BT_INTEGER
&& type
!= BT_CHARACTER
)
8343 gfc_error ("Argument of SELECT statement at %L cannot be %s",
8344 &case_expr
->where
, gfc_typename (&case_expr
->ts
));
8346 /* Punt. Going on here just produce more garbage error messages. */
8351 if (!select_type
&& case_expr
->rank
!= 0)
8353 gfc_error ("Argument of SELECT statement at %L must be a scalar "
8354 "expression", &case_expr
->where
);
8360 /* Raise a warning if an INTEGER case value exceeds the range of
8361 the case-expr. Later, all expressions will be promoted to the
8362 largest kind of all case-labels. */
8364 if (type
== BT_INTEGER
)
8365 for (body
= code
->block
; body
; body
= body
->block
)
8366 for (cp
= body
->ext
.block
.case_list
; cp
; cp
= cp
->next
)
8369 && gfc_check_integer_range (cp
->low
->value
.integer
,
8370 case_expr
->ts
.kind
) != ARITH_OK
)
8371 gfc_warning (0, "Expression in CASE statement at %L is "
8372 "not in the range of %s", &cp
->low
->where
,
8373 gfc_typename (&case_expr
->ts
));
8376 && cp
->low
!= cp
->high
8377 && gfc_check_integer_range (cp
->high
->value
.integer
,
8378 case_expr
->ts
.kind
) != ARITH_OK
)
8379 gfc_warning (0, "Expression in CASE statement at %L is "
8380 "not in the range of %s", &cp
->high
->where
,
8381 gfc_typename (&case_expr
->ts
));
8384 /* PR 19168 has a long discussion concerning a mismatch of the kinds
8385 of the SELECT CASE expression and its CASE values. Walk the lists
8386 of case values, and if we find a mismatch, promote case_expr to
8387 the appropriate kind. */
8389 if (type
== BT_LOGICAL
|| type
== BT_INTEGER
)
8391 for (body
= code
->block
; body
; body
= body
->block
)
8393 /* Walk the case label list. */
8394 for (cp
= body
->ext
.block
.case_list
; cp
; cp
= cp
->next
)
8396 /* Intercept the DEFAULT case. It does not have a kind. */
8397 if (cp
->low
== NULL
&& cp
->high
== NULL
)
8400 /* Unreachable case ranges are discarded, so ignore. */
8401 if (cp
->low
!= NULL
&& cp
->high
!= NULL
8402 && cp
->low
!= cp
->high
8403 && gfc_compare_expr (cp
->low
, cp
->high
, INTRINSIC_GT
) > 0)
8407 && case_expr
->ts
.kind
!= gfc_kind_max(case_expr
, cp
->low
))
8408 gfc_convert_type_warn (case_expr
, &cp
->low
->ts
, 2, 0);
8410 if (cp
->high
!= NULL
8411 && case_expr
->ts
.kind
!= gfc_kind_max(case_expr
, cp
->high
))
8412 gfc_convert_type_warn (case_expr
, &cp
->high
->ts
, 2, 0);
8417 /* Assume there is no DEFAULT case. */
8418 default_case
= NULL
;
8423 for (body
= code
->block
; body
; body
= body
->block
)
8425 /* Assume the CASE list is OK, and all CASE labels can be matched. */
8427 seen_unreachable
= 0;
8429 /* Walk the case label list, making sure that all case labels
8431 for (cp
= body
->ext
.block
.case_list
; cp
; cp
= cp
->next
)
8433 /* Count the number of cases in the whole construct. */
8436 /* Intercept the DEFAULT case. */
8437 if (cp
->low
== NULL
&& cp
->high
== NULL
)
8439 if (default_case
!= NULL
)
8441 gfc_error ("The DEFAULT CASE at %L cannot be followed "
8442 "by a second DEFAULT CASE at %L",
8443 &default_case
->where
, &cp
->where
);
8454 /* Deal with single value cases and case ranges. Errors are
8455 issued from the validation function. */
8456 if (!validate_case_label_expr (cp
->low
, case_expr
)
8457 || !validate_case_label_expr (cp
->high
, case_expr
))
8463 if (type
== BT_LOGICAL
8464 && ((cp
->low
== NULL
|| cp
->high
== NULL
)
8465 || cp
->low
!= cp
->high
))
8467 gfc_error ("Logical range in CASE statement at %L is not "
8468 "allowed", &cp
->low
->where
);
8473 if (type
== BT_LOGICAL
&& cp
->low
->expr_type
== EXPR_CONSTANT
)
8476 value
= cp
->low
->value
.logical
== 0 ? 2 : 1;
8477 if (value
& seen_logical
)
8479 gfc_error ("Constant logical value in CASE statement "
8480 "is repeated at %L",
8485 seen_logical
|= value
;
8488 if (cp
->low
!= NULL
&& cp
->high
!= NULL
8489 && cp
->low
!= cp
->high
8490 && gfc_compare_expr (cp
->low
, cp
->high
, INTRINSIC_GT
) > 0)
8492 if (warn_surprising
)
8493 gfc_warning (OPT_Wsurprising
,
8494 "Range specification at %L can never be matched",
8497 cp
->unreachable
= 1;
8498 seen_unreachable
= 1;
8502 /* If the case range can be matched, it can also overlap with
8503 other cases. To make sure it does not, we put it in a
8504 double linked list here. We sort that with a merge sort
8505 later on to detect any overlapping cases. */
8509 head
->right
= head
->left
= NULL
;
8514 tail
->right
->left
= tail
;
8521 /* It there was a failure in the previous case label, give up
8522 for this case label list. Continue with the next block. */
8526 /* See if any case labels that are unreachable have been seen.
8527 If so, we eliminate them. This is a bit of a kludge because
8528 the case lists for a single case statement (label) is a
8529 single forward linked lists. */
8530 if (seen_unreachable
)
8532 /* Advance until the first case in the list is reachable. */
8533 while (body
->ext
.block
.case_list
!= NULL
8534 && body
->ext
.block
.case_list
->unreachable
)
8536 gfc_case
*n
= body
->ext
.block
.case_list
;
8537 body
->ext
.block
.case_list
= body
->ext
.block
.case_list
->next
;
8539 gfc_free_case_list (n
);
8542 /* Strip all other unreachable cases. */
8543 if (body
->ext
.block
.case_list
)
8545 for (cp
= body
->ext
.block
.case_list
; cp
&& cp
->next
; cp
= cp
->next
)
8547 if (cp
->next
->unreachable
)
8549 gfc_case
*n
= cp
->next
;
8550 cp
->next
= cp
->next
->next
;
8552 gfc_free_case_list (n
);
8559 /* See if there were overlapping cases. If the check returns NULL,
8560 there was overlap. In that case we don't do anything. If head
8561 is non-NULL, we prepend the DEFAULT case. The sorted list can
8562 then used during code generation for SELECT CASE constructs with
8563 a case expression of a CHARACTER type. */
8566 head
= check_case_overlap (head
);
8568 /* Prepend the default_case if it is there. */
8569 if (head
!= NULL
&& default_case
)
8571 default_case
->left
= NULL
;
8572 default_case
->right
= head
;
8573 head
->left
= default_case
;
8577 /* Eliminate dead blocks that may be the result if we've seen
8578 unreachable case labels for a block. */
8579 for (body
= code
; body
&& body
->block
; body
= body
->block
)
8581 if (body
->block
->ext
.block
.case_list
== NULL
)
8583 /* Cut the unreachable block from the code chain. */
8584 gfc_code
*c
= body
->block
;
8585 body
->block
= c
->block
;
8587 /* Kill the dead block, but not the blocks below it. */
8589 gfc_free_statements (c
);
8593 /* More than two cases is legal but insane for logical selects.
8594 Issue a warning for it. */
8595 if (warn_surprising
&& type
== BT_LOGICAL
&& ncases
> 2)
8596 gfc_warning (OPT_Wsurprising
,
8597 "Logical SELECT CASE block at %L has more that two cases",
8602 /* Check if a derived type is extensible. */
8605 gfc_type_is_extensible (gfc_symbol
*sym
)
8607 return !(sym
->attr
.is_bind_c
|| sym
->attr
.sequence
8608 || (sym
->attr
.is_class
8609 && sym
->components
->ts
.u
.derived
->attr
.unlimited_polymorphic
));
8614 resolve_types (gfc_namespace
*ns
);
8616 /* Resolve an associate-name: Resolve target and ensure the type-spec is
8617 correct as well as possibly the array-spec. */
8620 resolve_assoc_var (gfc_symbol
* sym
, bool resolve_target
)
8624 gcc_assert (sym
->assoc
);
8625 gcc_assert (sym
->attr
.flavor
== FL_VARIABLE
);
8627 /* If this is for SELECT TYPE, the target may not yet be set. In that
8628 case, return. Resolution will be called later manually again when
8630 target
= sym
->assoc
->target
;
8633 gcc_assert (!sym
->assoc
->dangling
);
8635 if (resolve_target
&& !gfc_resolve_expr (target
))
8638 /* For variable targets, we get some attributes from the target. */
8639 if (target
->expr_type
== EXPR_VARIABLE
)
8643 gcc_assert (target
->symtree
);
8644 tsym
= target
->symtree
->n
.sym
;
8646 sym
->attr
.asynchronous
= tsym
->attr
.asynchronous
;
8647 sym
->attr
.volatile_
= tsym
->attr
.volatile_
;
8649 sym
->attr
.target
= tsym
->attr
.target
8650 || gfc_expr_attr (target
).pointer
;
8651 if (is_subref_array (target
))
8652 sym
->attr
.subref_array_pointer
= 1;
8655 if (target
->expr_type
== EXPR_NULL
)
8657 gfc_error ("Selector at %L cannot be NULL()", &target
->where
);
8660 else if (target
->ts
.type
== BT_UNKNOWN
)
8662 gfc_error ("Selector at %L has no type", &target
->where
);
8666 /* Get type if this was not already set. Note that it can be
8667 some other type than the target in case this is a SELECT TYPE
8668 selector! So we must not update when the type is already there. */
8669 if (sym
->ts
.type
== BT_UNKNOWN
)
8670 sym
->ts
= target
->ts
;
8672 gcc_assert (sym
->ts
.type
!= BT_UNKNOWN
);
8674 /* See if this is a valid association-to-variable. */
8675 sym
->assoc
->variable
= (target
->expr_type
== EXPR_VARIABLE
8676 && !gfc_has_vector_subscript (target
));
8678 /* Finally resolve if this is an array or not. */
8679 if (sym
->attr
.dimension
&& target
->rank
== 0)
8681 /* primary.c makes the assumption that a reference to an associate
8682 name followed by a left parenthesis is an array reference. */
8683 if (sym
->ts
.type
!= BT_CHARACTER
)
8684 gfc_error ("Associate-name %qs at %L is used as array",
8685 sym
->name
, &sym
->declared_at
);
8686 sym
->attr
.dimension
= 0;
8691 /* We cannot deal with class selectors that need temporaries. */
8692 if (target
->ts
.type
== BT_CLASS
8693 && gfc_ref_needs_temporary_p (target
->ref
))
8695 gfc_error ("CLASS selector at %L needs a temporary which is not "
8696 "yet implemented", &target
->where
);
8700 if (target
->ts
.type
== BT_CLASS
)
8701 gfc_fix_class_refs (target
);
8703 if (target
->rank
!= 0)
8706 /* The rank may be incorrectly guessed at parsing, therefore make sure
8707 it is corrected now. */
8708 if (sym
->ts
.type
!= BT_CLASS
&& (!sym
->as
|| sym
->assoc
->rankguessed
))
8711 sym
->as
= gfc_get_array_spec ();
8713 as
->rank
= target
->rank
;
8714 as
->type
= AS_DEFERRED
;
8715 as
->corank
= gfc_get_corank (target
);
8716 sym
->attr
.dimension
= 1;
8717 if (as
->corank
!= 0)
8718 sym
->attr
.codimension
= 1;
8720 else if (sym
->ts
.type
== BT_CLASS
&& (!CLASS_DATA (sym
)->as
|| sym
->assoc
->rankguessed
))
8722 if (!CLASS_DATA (sym
)->as
)
8723 CLASS_DATA (sym
)->as
= gfc_get_array_spec ();
8724 as
= CLASS_DATA (sym
)->as
;
8725 as
->rank
= target
->rank
;
8726 as
->type
= AS_DEFERRED
;
8727 as
->corank
= gfc_get_corank (target
);
8728 CLASS_DATA (sym
)->attr
.dimension
= 1;
8729 if (as
->corank
!= 0)
8730 CLASS_DATA (sym
)->attr
.codimension
= 1;
8735 /* target's rank is 0, but the type of the sym is still array valued,
8736 which has to be corrected. */
8737 if (sym
->ts
.type
== BT_CLASS
8738 && CLASS_DATA (sym
) && CLASS_DATA (sym
)->as
)
8741 symbol_attribute attr
;
8742 /* The associated variable's type is still the array type
8743 correct this now. */
8744 gfc_typespec
*ts
= &target
->ts
;
8747 for (ref
= target
->ref
; ref
!= NULL
; ref
= ref
->next
)
8752 ts
= &ref
->u
.c
.component
->ts
;
8755 if (ts
->type
== BT_CLASS
)
8756 ts
= &ts
->u
.derived
->components
->ts
;
8762 /* Create a scalar instance of the current class type. Because the
8763 rank of a class array goes into its name, the type has to be
8764 rebuild. The alternative of (re-)setting just the attributes
8765 and as in the current type, destroys the type also in other
8769 sym
->ts
.type
= BT_CLASS
;
8770 attr
= CLASS_DATA (sym
)->attr
;
8772 attr
.associate_var
= 1;
8773 attr
.dimension
= attr
.codimension
= 0;
8774 attr
.class_pointer
= 1;
8775 if (!gfc_build_class_symbol (&sym
->ts
, &attr
, &as
))
8777 /* Make sure the _vptr is set. */
8778 c
= gfc_find_component (sym
->ts
.u
.derived
, "_vptr", true, true, NULL
);
8779 if (c
->ts
.u
.derived
== NULL
)
8780 c
->ts
.u
.derived
= gfc_find_derived_vtab (sym
->ts
.u
.derived
);
8781 CLASS_DATA (sym
)->attr
.pointer
= 1;
8782 CLASS_DATA (sym
)->attr
.class_pointer
= 1;
8783 gfc_set_sym_referenced (sym
->ts
.u
.derived
);
8784 gfc_commit_symbol (sym
->ts
.u
.derived
);
8785 /* _vptr now has the _vtab in it, change it to the _vtype. */
8786 if (c
->ts
.u
.derived
->attr
.vtab
)
8787 c
->ts
.u
.derived
= c
->ts
.u
.derived
->ts
.u
.derived
;
8788 c
->ts
.u
.derived
->ns
->types_resolved
= 0;
8789 resolve_types (c
->ts
.u
.derived
->ns
);
8793 /* Mark this as an associate variable. */
8794 sym
->attr
.associate_var
= 1;
8796 /* Fix up the type-spec for CHARACTER types. */
8797 if (sym
->ts
.type
== BT_CHARACTER
&& !sym
->attr
.select_type_temporary
)
8800 sym
->ts
.u
.cl
= target
->ts
.u
.cl
;
8802 if (sym
->ts
.deferred
&& target
->expr_type
== EXPR_VARIABLE
8803 && target
->symtree
->n
.sym
->attr
.dummy
8804 && sym
->ts
.u
.cl
== target
->ts
.u
.cl
)
8806 sym
->ts
.u
.cl
= gfc_new_charlen (sym
->ns
, NULL
);
8807 sym
->ts
.deferred
= 1;
8810 if (!sym
->ts
.u
.cl
->length
8811 && !sym
->ts
.deferred
8812 && target
->expr_type
== EXPR_CONSTANT
)
8814 sym
->ts
.u
.cl
->length
=
8815 gfc_get_int_expr (gfc_charlen_int_kind
, NULL
,
8816 target
->value
.character
.length
);
8818 else if ((!sym
->ts
.u
.cl
->length
8819 || sym
->ts
.u
.cl
->length
->expr_type
!= EXPR_CONSTANT
)
8820 && target
->expr_type
!= EXPR_VARIABLE
)
8822 sym
->ts
.u
.cl
= gfc_new_charlen (sym
->ns
, NULL
);
8823 sym
->ts
.deferred
= 1;
8825 /* This is reset in trans-stmt.c after the assignment
8826 of the target expression to the associate name. */
8827 sym
->attr
.allocatable
= 1;
8831 /* If the target is a good class object, so is the associate variable. */
8832 if (sym
->ts
.type
== BT_CLASS
&& gfc_expr_attr (target
).class_ok
)
8833 sym
->attr
.class_ok
= 1;
8837 /* Ensure that SELECT TYPE expressions have the correct rank and a full
8838 array reference, where necessary. The symbols are artificial and so
8839 the dimension attribute and arrayspec can also be set. In addition,
8840 sometimes the expr1 arrives as BT_DERIVED, when the symbol is BT_CLASS.
8841 This is corrected here as well.*/
8844 fixup_array_ref (gfc_expr
**expr1
, gfc_expr
*expr2
,
8845 int rank
, gfc_ref
*ref
)
8847 gfc_ref
*nref
= (*expr1
)->ref
;
8848 gfc_symbol
*sym1
= (*expr1
)->symtree
->n
.sym
;
8849 gfc_symbol
*sym2
= expr2
? expr2
->symtree
->n
.sym
: NULL
;
8850 (*expr1
)->rank
= rank
;
8851 if (sym1
->ts
.type
== BT_CLASS
)
8853 if ((*expr1
)->ts
.type
!= BT_CLASS
)
8854 (*expr1
)->ts
= sym1
->ts
;
8856 CLASS_DATA (sym1
)->attr
.dimension
= 1;
8857 if (CLASS_DATA (sym1
)->as
== NULL
&& sym2
)
8858 CLASS_DATA (sym1
)->as
8859 = gfc_copy_array_spec (CLASS_DATA (sym2
)->as
);
8863 sym1
->attr
.dimension
= 1;
8864 if (sym1
->as
== NULL
&& sym2
)
8865 sym1
->as
= gfc_copy_array_spec (sym2
->as
);
8868 for (; nref
; nref
= nref
->next
)
8869 if (nref
->next
== NULL
)
8872 if (ref
&& nref
&& nref
->type
!= REF_ARRAY
)
8873 nref
->next
= gfc_copy_ref (ref
);
8874 else if (ref
&& !nref
)
8875 (*expr1
)->ref
= gfc_copy_ref (ref
);
8880 build_loc_call (gfc_expr
*sym_expr
)
8883 loc_call
= gfc_get_expr ();
8884 loc_call
->expr_type
= EXPR_FUNCTION
;
8885 gfc_get_sym_tree ("_loc", gfc_current_ns
, &loc_call
->symtree
, false);
8886 loc_call
->symtree
->n
.sym
->attr
.flavor
= FL_PROCEDURE
;
8887 loc_call
->symtree
->n
.sym
->attr
.intrinsic
= 1;
8888 loc_call
->symtree
->n
.sym
->result
= loc_call
->symtree
->n
.sym
;
8889 gfc_commit_symbol (loc_call
->symtree
->n
.sym
);
8890 loc_call
->ts
.type
= BT_INTEGER
;
8891 loc_call
->ts
.kind
= gfc_index_integer_kind
;
8892 loc_call
->value
.function
.isym
= gfc_intrinsic_function_by_id (GFC_ISYM_LOC
);
8893 loc_call
->value
.function
.actual
= gfc_get_actual_arglist ();
8894 loc_call
->value
.function
.actual
->expr
= sym_expr
;
8895 loc_call
->where
= sym_expr
->where
;
8899 /* Resolve a SELECT TYPE statement. */
8902 resolve_select_type (gfc_code
*code
, gfc_namespace
*old_ns
)
8904 gfc_symbol
*selector_type
;
8905 gfc_code
*body
, *new_st
, *if_st
, *tail
;
8906 gfc_code
*class_is
= NULL
, *default_case
= NULL
;
8909 char name
[GFC_MAX_SYMBOL_LEN
];
8913 gfc_ref
* ref
= NULL
;
8914 gfc_expr
*selector_expr
= NULL
;
8916 ns
= code
->ext
.block
.ns
;
8919 /* Check for F03:C813. */
8920 if (code
->expr1
->ts
.type
!= BT_CLASS
8921 && !(code
->expr2
&& code
->expr2
->ts
.type
== BT_CLASS
))
8923 gfc_error ("Selector shall be polymorphic in SELECT TYPE statement "
8924 "at %L", &code
->loc
);
8928 if (!code
->expr1
->symtree
->n
.sym
->attr
.class_ok
)
8933 gfc_ref
*ref2
= NULL
;
8934 for (ref
= code
->expr2
->ref
; ref
!= NULL
; ref
= ref
->next
)
8935 if (ref
->type
== REF_COMPONENT
8936 && ref
->u
.c
.component
->ts
.type
== BT_CLASS
)
8941 if (code
->expr1
->symtree
->n
.sym
->attr
.untyped
)
8942 code
->expr1
->symtree
->n
.sym
->ts
= ref2
->u
.c
.component
->ts
;
8943 selector_type
= CLASS_DATA (ref2
->u
.c
.component
)->ts
.u
.derived
;
8947 if (code
->expr1
->symtree
->n
.sym
->attr
.untyped
)
8948 code
->expr1
->symtree
->n
.sym
->ts
= code
->expr2
->ts
;
8949 selector_type
= CLASS_DATA (code
->expr2
)->ts
.u
.derived
;
8952 if (code
->expr2
->rank
&& CLASS_DATA (code
->expr1
)->as
)
8953 CLASS_DATA (code
->expr1
)->as
->rank
= code
->expr2
->rank
;
8955 /* F2008: C803 The selector expression must not be coindexed. */
8956 if (gfc_is_coindexed (code
->expr2
))
8958 gfc_error ("Selector at %L must not be coindexed",
8959 &code
->expr2
->where
);
8966 selector_type
= CLASS_DATA (code
->expr1
)->ts
.u
.derived
;
8968 if (gfc_is_coindexed (code
->expr1
))
8970 gfc_error ("Selector at %L must not be coindexed",
8971 &code
->expr1
->where
);
8976 /* Loop over TYPE IS / CLASS IS cases. */
8977 for (body
= code
->block
; body
; body
= body
->block
)
8979 c
= body
->ext
.block
.case_list
;
8983 /* Check for repeated cases. */
8984 for (tail
= code
->block
; tail
; tail
= tail
->block
)
8986 gfc_case
*d
= tail
->ext
.block
.case_list
;
8990 if (c
->ts
.type
== d
->ts
.type
8991 && ((c
->ts
.type
== BT_DERIVED
8992 && c
->ts
.u
.derived
&& d
->ts
.u
.derived
8993 && !strcmp (c
->ts
.u
.derived
->name
,
8994 d
->ts
.u
.derived
->name
))
8995 || c
->ts
.type
== BT_UNKNOWN
8996 || (!(c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
8997 && c
->ts
.kind
== d
->ts
.kind
)))
8999 gfc_error ("TYPE IS at %L overlaps with TYPE IS at %L",
9000 &c
->where
, &d
->where
);
9006 /* Check F03:C815. */
9007 if ((c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
9008 && !selector_type
->attr
.unlimited_polymorphic
9009 && !gfc_type_is_extensible (c
->ts
.u
.derived
))
9011 gfc_error ("Derived type %qs at %L must be extensible",
9012 c
->ts
.u
.derived
->name
, &c
->where
);
9017 /* Check F03:C816. */
9018 if (c
->ts
.type
!= BT_UNKNOWN
&& !selector_type
->attr
.unlimited_polymorphic
9019 && ((c
->ts
.type
!= BT_DERIVED
&& c
->ts
.type
!= BT_CLASS
)
9020 || !gfc_type_is_extension_of (selector_type
, c
->ts
.u
.derived
)))
9022 if (c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
9023 gfc_error ("Derived type %qs at %L must be an extension of %qs",
9024 c
->ts
.u
.derived
->name
, &c
->where
, selector_type
->name
);
9026 gfc_error ("Unexpected intrinsic type %qs at %L",
9027 gfc_basic_typename (c
->ts
.type
), &c
->where
);
9032 /* Check F03:C814. */
9033 if (c
->ts
.type
== BT_CHARACTER
9034 && (c
->ts
.u
.cl
->length
!= NULL
|| c
->ts
.deferred
))
9036 gfc_error ("The type-spec at %L shall specify that each length "
9037 "type parameter is assumed", &c
->where
);
9042 /* Intercept the DEFAULT case. */
9043 if (c
->ts
.type
== BT_UNKNOWN
)
9045 /* Check F03:C818. */
9048 gfc_error ("The DEFAULT CASE at %L cannot be followed "
9049 "by a second DEFAULT CASE at %L",
9050 &default_case
->ext
.block
.case_list
->where
, &c
->where
);
9055 default_case
= body
;
9062 /* Transform SELECT TYPE statement to BLOCK and associate selector to
9063 target if present. If there are any EXIT statements referring to the
9064 SELECT TYPE construct, this is no problem because the gfc_code
9065 reference stays the same and EXIT is equally possible from the BLOCK
9066 it is changed to. */
9067 code
->op
= EXEC_BLOCK
;
9070 gfc_association_list
* assoc
;
9072 assoc
= gfc_get_association_list ();
9073 assoc
->st
= code
->expr1
->symtree
;
9074 assoc
->target
= gfc_copy_expr (code
->expr2
);
9075 assoc
->target
->where
= code
->expr2
->where
;
9076 /* assoc->variable will be set by resolve_assoc_var. */
9078 code
->ext
.block
.assoc
= assoc
;
9079 code
->expr1
->symtree
->n
.sym
->assoc
= assoc
;
9081 resolve_assoc_var (code
->expr1
->symtree
->n
.sym
, false);
9084 code
->ext
.block
.assoc
= NULL
;
9086 /* Ensure that the selector rank and arrayspec are available to
9087 correct expressions in which they might be missing. */
9088 if (code
->expr2
&& code
->expr2
->rank
)
9090 rank
= code
->expr2
->rank
;
9091 for (ref
= code
->expr2
->ref
; ref
; ref
= ref
->next
)
9092 if (ref
->next
== NULL
)
9094 if (ref
&& ref
->type
== REF_ARRAY
)
9095 ref
= gfc_copy_ref (ref
);
9097 /* Fixup expr1 if necessary. */
9099 fixup_array_ref (&code
->expr1
, code
->expr2
, rank
, ref
);
9101 else if (code
->expr1
->rank
)
9103 rank
= code
->expr1
->rank
;
9104 for (ref
= code
->expr1
->ref
; ref
; ref
= ref
->next
)
9105 if (ref
->next
== NULL
)
9107 if (ref
&& ref
->type
== REF_ARRAY
)
9108 ref
= gfc_copy_ref (ref
);
9111 /* Add EXEC_SELECT to switch on type. */
9112 new_st
= gfc_get_code (code
->op
);
9113 new_st
->expr1
= code
->expr1
;
9114 new_st
->expr2
= code
->expr2
;
9115 new_st
->block
= code
->block
;
9116 code
->expr1
= code
->expr2
= NULL
;
9121 ns
->code
->next
= new_st
;
9123 code
->op
= EXEC_SELECT_TYPE
;
9125 /* Use the intrinsic LOC function to generate an integer expression
9126 for the vtable of the selector. Note that the rank of the selector
9127 expression has to be set to zero. */
9128 gfc_add_vptr_component (code
->expr1
);
9129 code
->expr1
->rank
= 0;
9130 code
->expr1
= build_loc_call (code
->expr1
);
9131 selector_expr
= code
->expr1
->value
.function
.actual
->expr
;
9133 /* Loop over TYPE IS / CLASS IS cases. */
9134 for (body
= code
->block
; body
; body
= body
->block
)
9138 c
= body
->ext
.block
.case_list
;
9140 /* Generate an index integer expression for address of the
9141 TYPE/CLASS vtable and store it in c->low. The hash expression
9142 is stored in c->high and is used to resolve intrinsic cases. */
9143 if (c
->ts
.type
!= BT_UNKNOWN
)
9145 if (c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
9147 vtab
= gfc_find_derived_vtab (c
->ts
.u
.derived
);
9149 c
->high
= gfc_get_int_expr (gfc_integer_4_kind
, NULL
,
9150 c
->ts
.u
.derived
->hash_value
);
9154 vtab
= gfc_find_vtab (&c
->ts
);
9155 gcc_assert (vtab
&& CLASS_DATA (vtab
)->initializer
);
9156 e
= CLASS_DATA (vtab
)->initializer
;
9157 c
->high
= gfc_copy_expr (e
);
9158 if (c
->high
->ts
.kind
!= gfc_integer_4_kind
)
9161 ts
.kind
= gfc_integer_4_kind
;
9162 ts
.type
= BT_INTEGER
;
9163 gfc_convert_type_warn (c
->high
, &ts
, 2, 0);
9167 e
= gfc_lval_expr_from_sym (vtab
);
9168 c
->low
= build_loc_call (e
);
9173 /* Associate temporary to selector. This should only be done
9174 when this case is actually true, so build a new ASSOCIATE
9175 that does precisely this here (instead of using the
9178 if (c
->ts
.type
== BT_CLASS
)
9179 sprintf (name
, "__tmp_class_%s", c
->ts
.u
.derived
->name
);
9180 else if (c
->ts
.type
== BT_DERIVED
)
9181 sprintf (name
, "__tmp_type_%s", c
->ts
.u
.derived
->name
);
9182 else if (c
->ts
.type
== BT_CHARACTER
)
9184 HOST_WIDE_INT charlen
= 0;
9185 if (c
->ts
.u
.cl
&& c
->ts
.u
.cl
->length
9186 && c
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
)
9187 charlen
= gfc_mpz_get_hwi (c
->ts
.u
.cl
->length
->value
.integer
);
9188 snprintf (name
, sizeof (name
),
9189 "__tmp_%s_" HOST_WIDE_INT_PRINT_DEC
"_%d",
9190 gfc_basic_typename (c
->ts
.type
), charlen
, c
->ts
.kind
);
9193 sprintf (name
, "__tmp_%s_%d", gfc_basic_typename (c
->ts
.type
),
9196 st
= gfc_find_symtree (ns
->sym_root
, name
);
9197 gcc_assert (st
->n
.sym
->assoc
);
9198 st
->n
.sym
->assoc
->target
= gfc_get_variable_expr (selector_expr
->symtree
);
9199 st
->n
.sym
->assoc
->target
->where
= selector_expr
->where
;
9200 if (c
->ts
.type
!= BT_CLASS
&& c
->ts
.type
!= BT_UNKNOWN
)
9202 gfc_add_data_component (st
->n
.sym
->assoc
->target
);
9203 /* Fixup the target expression if necessary. */
9205 fixup_array_ref (&st
->n
.sym
->assoc
->target
, NULL
, rank
, ref
);
9208 new_st
= gfc_get_code (EXEC_BLOCK
);
9209 new_st
->ext
.block
.ns
= gfc_build_block_ns (ns
);
9210 new_st
->ext
.block
.ns
->code
= body
->next
;
9211 body
->next
= new_st
;
9213 /* Chain in the new list only if it is marked as dangling. Otherwise
9214 there is a CASE label overlap and this is already used. Just ignore,
9215 the error is diagnosed elsewhere. */
9216 if (st
->n
.sym
->assoc
->dangling
)
9218 new_st
->ext
.block
.assoc
= st
->n
.sym
->assoc
;
9219 st
->n
.sym
->assoc
->dangling
= 0;
9222 resolve_assoc_var (st
->n
.sym
, false);
9225 /* Take out CLASS IS cases for separate treatment. */
9227 while (body
&& body
->block
)
9229 if (body
->block
->ext
.block
.case_list
->ts
.type
== BT_CLASS
)
9231 /* Add to class_is list. */
9232 if (class_is
== NULL
)
9234 class_is
= body
->block
;
9239 for (tail
= class_is
; tail
->block
; tail
= tail
->block
) ;
9240 tail
->block
= body
->block
;
9243 /* Remove from EXEC_SELECT list. */
9244 body
->block
= body
->block
->block
;
9257 /* Add a default case to hold the CLASS IS cases. */
9258 for (tail
= code
; tail
->block
; tail
= tail
->block
) ;
9259 tail
->block
= gfc_get_code (EXEC_SELECT_TYPE
);
9261 tail
->ext
.block
.case_list
= gfc_get_case ();
9262 tail
->ext
.block
.case_list
->ts
.type
= BT_UNKNOWN
;
9264 default_case
= tail
;
9267 /* More than one CLASS IS block? */
9268 if (class_is
->block
)
9272 /* Sort CLASS IS blocks by extension level. */
9276 for (c1
= &class_is
; (*c1
) && (*c1
)->block
; c1
= &((*c1
)->block
))
9279 /* F03:C817 (check for doubles). */
9280 if ((*c1
)->ext
.block
.case_list
->ts
.u
.derived
->hash_value
9281 == c2
->ext
.block
.case_list
->ts
.u
.derived
->hash_value
)
9283 gfc_error ("Double CLASS IS block in SELECT TYPE "
9285 &c2
->ext
.block
.case_list
->where
);
9288 if ((*c1
)->ext
.block
.case_list
->ts
.u
.derived
->attr
.extension
9289 < c2
->ext
.block
.case_list
->ts
.u
.derived
->attr
.extension
)
9292 (*c1
)->block
= c2
->block
;
9302 /* Generate IF chain. */
9303 if_st
= gfc_get_code (EXEC_IF
);
9305 for (body
= class_is
; body
; body
= body
->block
)
9307 new_st
->block
= gfc_get_code (EXEC_IF
);
9308 new_st
= new_st
->block
;
9309 /* Set up IF condition: Call _gfortran_is_extension_of. */
9310 new_st
->expr1
= gfc_get_expr ();
9311 new_st
->expr1
->expr_type
= EXPR_FUNCTION
;
9312 new_st
->expr1
->ts
.type
= BT_LOGICAL
;
9313 new_st
->expr1
->ts
.kind
= 4;
9314 new_st
->expr1
->value
.function
.name
= gfc_get_string (PREFIX ("is_extension_of"));
9315 new_st
->expr1
->value
.function
.isym
= XCNEW (gfc_intrinsic_sym
);
9316 new_st
->expr1
->value
.function
.isym
->id
= GFC_ISYM_EXTENDS_TYPE_OF
;
9317 /* Set up arguments. */
9318 new_st
->expr1
->value
.function
.actual
= gfc_get_actual_arglist ();
9319 new_st
->expr1
->value
.function
.actual
->expr
= gfc_get_variable_expr (selector_expr
->symtree
);
9320 new_st
->expr1
->value
.function
.actual
->expr
->where
= code
->loc
;
9321 new_st
->expr1
->where
= code
->loc
;
9322 gfc_add_vptr_component (new_st
->expr1
->value
.function
.actual
->expr
);
9323 vtab
= gfc_find_derived_vtab (body
->ext
.block
.case_list
->ts
.u
.derived
);
9324 st
= gfc_find_symtree (vtab
->ns
->sym_root
, vtab
->name
);
9325 new_st
->expr1
->value
.function
.actual
->next
= gfc_get_actual_arglist ();
9326 new_st
->expr1
->value
.function
.actual
->next
->expr
= gfc_get_variable_expr (st
);
9327 new_st
->expr1
->value
.function
.actual
->next
->expr
->where
= code
->loc
;
9328 new_st
->next
= body
->next
;
9330 if (default_case
->next
)
9332 new_st
->block
= gfc_get_code (EXEC_IF
);
9333 new_st
= new_st
->block
;
9334 new_st
->next
= default_case
->next
;
9337 /* Replace CLASS DEFAULT code by the IF chain. */
9338 default_case
->next
= if_st
;
9341 /* Resolve the internal code. This cannot be done earlier because
9342 it requires that the sym->assoc of selectors is set already. */
9343 gfc_current_ns
= ns
;
9344 gfc_resolve_blocks (code
->block
, gfc_current_ns
);
9345 gfc_current_ns
= old_ns
;
9352 /* Resolve a transfer statement. This is making sure that:
9353 -- a derived type being transferred has only non-pointer components
9354 -- a derived type being transferred doesn't have private components, unless
9355 it's being transferred from the module where the type was defined
9356 -- we're not trying to transfer a whole assumed size array. */
9359 resolve_transfer (gfc_code
*code
)
9361 gfc_symbol
*sym
, *derived
;
9365 bool formatted
= false;
9366 gfc_dt
*dt
= code
->ext
.dt
;
9367 gfc_symbol
*dtio_sub
= NULL
;
9371 while (exp
!= NULL
&& exp
->expr_type
== EXPR_OP
9372 && exp
->value
.op
.op
== INTRINSIC_PARENTHESES
)
9373 exp
= exp
->value
.op
.op1
;
9375 if (exp
&& exp
->expr_type
== EXPR_NULL
9378 gfc_error ("Invalid context for NULL () intrinsic at %L",
9383 if (exp
== NULL
|| (exp
->expr_type
!= EXPR_VARIABLE
9384 && exp
->expr_type
!= EXPR_FUNCTION
9385 && exp
->expr_type
!= EXPR_STRUCTURE
))
9388 /* If we are reading, the variable will be changed. Note that
9389 code->ext.dt may be NULL if the TRANSFER is related to
9390 an INQUIRE statement -- but in this case, we are not reading, either. */
9391 if (dt
&& dt
->dt_io_kind
->value
.iokind
== M_READ
9392 && !gfc_check_vardef_context (exp
, false, false, false,
9396 const gfc_typespec
*ts
= exp
->expr_type
== EXPR_STRUCTURE
9397 || exp
->expr_type
== EXPR_FUNCTION
9398 ? &exp
->ts
: &exp
->symtree
->n
.sym
->ts
;
9400 /* Go to actual component transferred. */
9401 for (ref
= exp
->ref
; ref
; ref
= ref
->next
)
9402 if (ref
->type
== REF_COMPONENT
)
9403 ts
= &ref
->u
.c
.component
->ts
;
9405 if (dt
&& dt
->dt_io_kind
->value
.iokind
!= M_INQUIRE
9406 && (ts
->type
== BT_DERIVED
|| ts
->type
== BT_CLASS
))
9408 derived
= ts
->u
.derived
;
9410 /* Determine when to use the formatted DTIO procedure. */
9411 if (dt
&& (dt
->format_expr
|| dt
->format_label
))
9414 write
= dt
->dt_io_kind
->value
.iokind
== M_WRITE
9415 || dt
->dt_io_kind
->value
.iokind
== M_PRINT
;
9416 dtio_sub
= gfc_find_specific_dtio_proc (derived
, write
, formatted
);
9418 if (dtio_sub
!= NULL
&& exp
->expr_type
== EXPR_VARIABLE
)
9421 sym
= exp
->symtree
->n
.sym
->ns
->proc_name
;
9422 /* Check to see if this is a nested DTIO call, with the
9423 dummy as the io-list object. */
9424 if (sym
&& sym
== dtio_sub
&& sym
->formal
9425 && sym
->formal
->sym
== exp
->symtree
->n
.sym
9426 && exp
->ref
== NULL
)
9428 if (!sym
->attr
.recursive
)
9430 gfc_error ("DTIO %s procedure at %L must be recursive",
9431 sym
->name
, &sym
->declared_at
);
9438 if (ts
->type
== BT_CLASS
&& dtio_sub
== NULL
)
9440 gfc_error ("Data transfer element at %L cannot be polymorphic unless "
9441 "it is processed by a defined input/output procedure",
9446 if (ts
->type
== BT_DERIVED
)
9448 /* Check that transferred derived type doesn't contain POINTER
9449 components unless it is processed by a defined input/output
9451 if (ts
->u
.derived
->attr
.pointer_comp
&& dtio_sub
== NULL
)
9453 gfc_error ("Data transfer element at %L cannot have POINTER "
9454 "components unless it is processed by a defined "
9455 "input/output procedure", &code
->loc
);
9460 if (ts
->u
.derived
->attr
.proc_pointer_comp
)
9462 gfc_error ("Data transfer element at %L cannot have "
9463 "procedure pointer components", &code
->loc
);
9467 if (ts
->u
.derived
->attr
.alloc_comp
&& dtio_sub
== NULL
)
9469 gfc_error ("Data transfer element at %L cannot have ALLOCATABLE "
9470 "components unless it is processed by a defined "
9471 "input/output procedure", &code
->loc
);
9475 /* C_PTR and C_FUNPTR have private components which means they cannot
9476 be printed. However, if -std=gnu and not -pedantic, allow
9477 the component to be printed to help debugging. */
9478 if (ts
->u
.derived
->ts
.f90_type
== BT_VOID
)
9480 if (!gfc_notify_std (GFC_STD_GNU
, "Data transfer element at %L "
9481 "cannot have PRIVATE components", &code
->loc
))
9484 else if (derived_inaccessible (ts
->u
.derived
) && dtio_sub
== NULL
)
9486 gfc_error ("Data transfer element at %L cannot have "
9487 "PRIVATE components unless it is processed by "
9488 "a defined input/output procedure", &code
->loc
);
9493 if (exp
->expr_type
== EXPR_STRUCTURE
)
9496 sym
= exp
->symtree
->n
.sym
;
9498 if (sym
->as
!= NULL
&& sym
->as
->type
== AS_ASSUMED_SIZE
&& exp
->ref
9499 && exp
->ref
->type
== REF_ARRAY
&& exp
->ref
->u
.ar
.type
== AR_FULL
)
9501 gfc_error ("Data transfer element at %L cannot be a full reference to "
9502 "an assumed-size array", &code
->loc
);
9506 if (async_io_dt
&& exp
->expr_type
== EXPR_VARIABLE
)
9507 exp
->symtree
->n
.sym
->attr
.asynchronous
= 1;
9511 /*********** Toplevel code resolution subroutines ***********/
9513 /* Find the set of labels that are reachable from this block. We also
9514 record the last statement in each block. */
9517 find_reachable_labels (gfc_code
*block
)
9524 cs_base
->reachable_labels
= bitmap_alloc (&labels_obstack
);
9526 /* Collect labels in this block. We don't keep those corresponding
9527 to END {IF|SELECT}, these are checked in resolve_branch by going
9528 up through the code_stack. */
9529 for (c
= block
; c
; c
= c
->next
)
9531 if (c
->here
&& c
->op
!= EXEC_END_NESTED_BLOCK
)
9532 bitmap_set_bit (cs_base
->reachable_labels
, c
->here
->value
);
9535 /* Merge with labels from parent block. */
9538 gcc_assert (cs_base
->prev
->reachable_labels
);
9539 bitmap_ior_into (cs_base
->reachable_labels
,
9540 cs_base
->prev
->reachable_labels
);
9546 resolve_lock_unlock_event (gfc_code
*code
)
9548 if (code
->expr1
->expr_type
== EXPR_FUNCTION
9549 && code
->expr1
->value
.function
.isym
9550 && code
->expr1
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
)
9551 remove_caf_get_intrinsic (code
->expr1
);
9553 if ((code
->op
== EXEC_LOCK
|| code
->op
== EXEC_UNLOCK
)
9554 && (code
->expr1
->ts
.type
!= BT_DERIVED
9555 || code
->expr1
->expr_type
!= EXPR_VARIABLE
9556 || code
->expr1
->ts
.u
.derived
->from_intmod
!= INTMOD_ISO_FORTRAN_ENV
9557 || code
->expr1
->ts
.u
.derived
->intmod_sym_id
!= ISOFORTRAN_LOCK_TYPE
9558 || code
->expr1
->rank
!= 0
9559 || (!gfc_is_coarray (code
->expr1
) &&
9560 !gfc_is_coindexed (code
->expr1
))))
9561 gfc_error ("Lock variable at %L must be a scalar of type LOCK_TYPE",
9562 &code
->expr1
->where
);
9563 else if ((code
->op
== EXEC_EVENT_POST
|| code
->op
== EXEC_EVENT_WAIT
)
9564 && (code
->expr1
->ts
.type
!= BT_DERIVED
9565 || code
->expr1
->expr_type
!= EXPR_VARIABLE
9566 || code
->expr1
->ts
.u
.derived
->from_intmod
9567 != INTMOD_ISO_FORTRAN_ENV
9568 || code
->expr1
->ts
.u
.derived
->intmod_sym_id
9569 != ISOFORTRAN_EVENT_TYPE
9570 || code
->expr1
->rank
!= 0))
9571 gfc_error ("Event variable at %L must be a scalar of type EVENT_TYPE",
9572 &code
->expr1
->where
);
9573 else if (code
->op
== EXEC_EVENT_POST
&& !gfc_is_coarray (code
->expr1
)
9574 && !gfc_is_coindexed (code
->expr1
))
9575 gfc_error ("Event variable argument at %L must be a coarray or coindexed",
9576 &code
->expr1
->where
);
9577 else if (code
->op
== EXEC_EVENT_WAIT
&& !gfc_is_coarray (code
->expr1
))
9578 gfc_error ("Event variable argument at %L must be a coarray but not "
9579 "coindexed", &code
->expr1
->where
);
9583 && (code
->expr2
->ts
.type
!= BT_INTEGER
|| code
->expr2
->rank
!= 0
9584 || code
->expr2
->expr_type
!= EXPR_VARIABLE
))
9585 gfc_error ("STAT= argument at %L must be a scalar INTEGER variable",
9586 &code
->expr2
->where
);
9589 && !gfc_check_vardef_context (code
->expr2
, false, false, false,
9590 _("STAT variable")))
9595 && (code
->expr3
->ts
.type
!= BT_CHARACTER
|| code
->expr3
->rank
!= 0
9596 || code
->expr3
->expr_type
!= EXPR_VARIABLE
))
9597 gfc_error ("ERRMSG= argument at %L must be a scalar CHARACTER variable",
9598 &code
->expr3
->where
);
9601 && !gfc_check_vardef_context (code
->expr3
, false, false, false,
9602 _("ERRMSG variable")))
9605 /* Check for LOCK the ACQUIRED_LOCK. */
9606 if (code
->op
!= EXEC_EVENT_WAIT
&& code
->expr4
9607 && (code
->expr4
->ts
.type
!= BT_LOGICAL
|| code
->expr4
->rank
!= 0
9608 || code
->expr4
->expr_type
!= EXPR_VARIABLE
))
9609 gfc_error ("ACQUIRED_LOCK= argument at %L must be a scalar LOGICAL "
9610 "variable", &code
->expr4
->where
);
9612 if (code
->op
!= EXEC_EVENT_WAIT
&& code
->expr4
9613 && !gfc_check_vardef_context (code
->expr4
, false, false, false,
9614 _("ACQUIRED_LOCK variable")))
9617 /* Check for EVENT WAIT the UNTIL_COUNT. */
9618 if (code
->op
== EXEC_EVENT_WAIT
&& code
->expr4
)
9620 if (!gfc_resolve_expr (code
->expr4
) || code
->expr4
->ts
.type
!= BT_INTEGER
9621 || code
->expr4
->rank
!= 0)
9622 gfc_error ("UNTIL_COUNT= argument at %L must be a scalar INTEGER "
9623 "expression", &code
->expr4
->where
);
9629 resolve_critical (gfc_code
*code
)
9631 gfc_symtree
*symtree
;
9632 gfc_symbol
*lock_type
;
9633 char name
[GFC_MAX_SYMBOL_LEN
];
9634 static int serial
= 0;
9636 if (flag_coarray
!= GFC_FCOARRAY_LIB
)
9639 symtree
= gfc_find_symtree (gfc_current_ns
->sym_root
,
9640 GFC_PREFIX ("lock_type"));
9642 lock_type
= symtree
->n
.sym
;
9645 if (gfc_get_sym_tree (GFC_PREFIX ("lock_type"), gfc_current_ns
, &symtree
,
9648 lock_type
= symtree
->n
.sym
;
9649 lock_type
->attr
.flavor
= FL_DERIVED
;
9650 lock_type
->attr
.zero_comp
= 1;
9651 lock_type
->from_intmod
= INTMOD_ISO_FORTRAN_ENV
;
9652 lock_type
->intmod_sym_id
= ISOFORTRAN_LOCK_TYPE
;
9655 sprintf(name
, GFC_PREFIX ("lock_var") "%d",serial
++);
9656 if (gfc_get_sym_tree (name
, gfc_current_ns
, &symtree
, false) != 0)
9659 code
->resolved_sym
= symtree
->n
.sym
;
9660 symtree
->n
.sym
->attr
.flavor
= FL_VARIABLE
;
9661 symtree
->n
.sym
->attr
.referenced
= 1;
9662 symtree
->n
.sym
->attr
.artificial
= 1;
9663 symtree
->n
.sym
->attr
.codimension
= 1;
9664 symtree
->n
.sym
->ts
.type
= BT_DERIVED
;
9665 symtree
->n
.sym
->ts
.u
.derived
= lock_type
;
9666 symtree
->n
.sym
->as
= gfc_get_array_spec ();
9667 symtree
->n
.sym
->as
->corank
= 1;
9668 symtree
->n
.sym
->as
->type
= AS_EXPLICIT
;
9669 symtree
->n
.sym
->as
->cotype
= AS_EXPLICIT
;
9670 symtree
->n
.sym
->as
->lower
[0] = gfc_get_int_expr (gfc_default_integer_kind
,
9672 gfc_commit_symbols();
9677 resolve_sync (gfc_code
*code
)
9679 /* Check imageset. The * case matches expr1 == NULL. */
9682 if (code
->expr1
->ts
.type
!= BT_INTEGER
|| code
->expr1
->rank
> 1)
9683 gfc_error ("Imageset argument at %L must be a scalar or rank-1 "
9684 "INTEGER expression", &code
->expr1
->where
);
9685 if (code
->expr1
->expr_type
== EXPR_CONSTANT
&& code
->expr1
->rank
== 0
9686 && mpz_cmp_si (code
->expr1
->value
.integer
, 1) < 0)
9687 gfc_error ("Imageset argument at %L must between 1 and num_images()",
9688 &code
->expr1
->where
);
9689 else if (code
->expr1
->expr_type
== EXPR_ARRAY
9690 && gfc_simplify_expr (code
->expr1
, 0))
9692 gfc_constructor
*cons
;
9693 cons
= gfc_constructor_first (code
->expr1
->value
.constructor
);
9694 for (; cons
; cons
= gfc_constructor_next (cons
))
9695 if (cons
->expr
->expr_type
== EXPR_CONSTANT
9696 && mpz_cmp_si (cons
->expr
->value
.integer
, 1) < 0)
9697 gfc_error ("Imageset argument at %L must between 1 and "
9698 "num_images()", &cons
->expr
->where
);
9703 gfc_resolve_expr (code
->expr2
);
9705 && (code
->expr2
->ts
.type
!= BT_INTEGER
|| code
->expr2
->rank
!= 0
9706 || code
->expr2
->expr_type
!= EXPR_VARIABLE
))
9707 gfc_error ("STAT= argument at %L must be a scalar INTEGER variable",
9708 &code
->expr2
->where
);
9711 gfc_resolve_expr (code
->expr3
);
9713 && (code
->expr3
->ts
.type
!= BT_CHARACTER
|| code
->expr3
->rank
!= 0
9714 || code
->expr3
->expr_type
!= EXPR_VARIABLE
))
9715 gfc_error ("ERRMSG= argument at %L must be a scalar CHARACTER variable",
9716 &code
->expr3
->where
);
9720 /* Given a branch to a label, see if the branch is conforming.
9721 The code node describes where the branch is located. */
9724 resolve_branch (gfc_st_label
*label
, gfc_code
*code
)
9731 /* Step one: is this a valid branching target? */
9733 if (label
->defined
== ST_LABEL_UNKNOWN
)
9735 gfc_error ("Label %d referenced at %L is never defined", label
->value
,
9740 if (label
->defined
!= ST_LABEL_TARGET
&& label
->defined
!= ST_LABEL_DO_TARGET
)
9742 gfc_error ("Statement at %L is not a valid branch target statement "
9743 "for the branch statement at %L", &label
->where
, &code
->loc
);
9747 /* Step two: make sure this branch is not a branch to itself ;-) */
9749 if (code
->here
== label
)
9752 "Branch at %L may result in an infinite loop", &code
->loc
);
9756 /* Step three: See if the label is in the same block as the
9757 branching statement. The hard work has been done by setting up
9758 the bitmap reachable_labels. */
9760 if (bitmap_bit_p (cs_base
->reachable_labels
, label
->value
))
9762 /* Check now whether there is a CRITICAL construct; if so, check
9763 whether the label is still visible outside of the CRITICAL block,
9764 which is invalid. */
9765 for (stack
= cs_base
; stack
; stack
= stack
->prev
)
9767 if (stack
->current
->op
== EXEC_CRITICAL
9768 && bitmap_bit_p (stack
->reachable_labels
, label
->value
))
9769 gfc_error ("GOTO statement at %L leaves CRITICAL construct for "
9770 "label at %L", &code
->loc
, &label
->where
);
9771 else if (stack
->current
->op
== EXEC_DO_CONCURRENT
9772 && bitmap_bit_p (stack
->reachable_labels
, label
->value
))
9773 gfc_error ("GOTO statement at %L leaves DO CONCURRENT construct "
9774 "for label at %L", &code
->loc
, &label
->where
);
9780 /* Step four: If we haven't found the label in the bitmap, it may
9781 still be the label of the END of the enclosing block, in which
9782 case we find it by going up the code_stack. */
9784 for (stack
= cs_base
; stack
; stack
= stack
->prev
)
9786 if (stack
->current
->next
&& stack
->current
->next
->here
== label
)
9788 if (stack
->current
->op
== EXEC_CRITICAL
)
9790 /* Note: A label at END CRITICAL does not leave the CRITICAL
9791 construct as END CRITICAL is still part of it. */
9792 gfc_error ("GOTO statement at %L leaves CRITICAL construct for label"
9793 " at %L", &code
->loc
, &label
->where
);
9796 else if (stack
->current
->op
== EXEC_DO_CONCURRENT
)
9798 gfc_error ("GOTO statement at %L leaves DO CONCURRENT construct for "
9799 "label at %L", &code
->loc
, &label
->where
);
9806 gcc_assert (stack
->current
->next
->op
== EXEC_END_NESTED_BLOCK
);
9810 /* The label is not in an enclosing block, so illegal. This was
9811 allowed in Fortran 66, so we allow it as extension. No
9812 further checks are necessary in this case. */
9813 gfc_notify_std (GFC_STD_LEGACY
, "Label at %L is not in the same block "
9814 "as the GOTO statement at %L", &label
->where
,
9820 /* Check whether EXPR1 has the same shape as EXPR2. */
9823 resolve_where_shape (gfc_expr
*expr1
, gfc_expr
*expr2
)
9825 mpz_t shape
[GFC_MAX_DIMENSIONS
];
9826 mpz_t shape2
[GFC_MAX_DIMENSIONS
];
9827 bool result
= false;
9830 /* Compare the rank. */
9831 if (expr1
->rank
!= expr2
->rank
)
9834 /* Compare the size of each dimension. */
9835 for (i
=0; i
<expr1
->rank
; i
++)
9837 if (!gfc_array_dimen_size (expr1
, i
, &shape
[i
]))
9840 if (!gfc_array_dimen_size (expr2
, i
, &shape2
[i
]))
9843 if (mpz_cmp (shape
[i
], shape2
[i
]))
9847 /* When either of the two expression is an assumed size array, we
9848 ignore the comparison of dimension sizes. */
9853 gfc_clear_shape (shape
, i
);
9854 gfc_clear_shape (shape2
, i
);
9859 /* Check whether a WHERE assignment target or a WHERE mask expression
9860 has the same shape as the outmost WHERE mask expression. */
9863 resolve_where (gfc_code
*code
, gfc_expr
*mask
)
9869 cblock
= code
->block
;
9871 /* Store the first WHERE mask-expr of the WHERE statement or construct.
9872 In case of nested WHERE, only the outmost one is stored. */
9873 if (mask
== NULL
) /* outmost WHERE */
9875 else /* inner WHERE */
9882 /* Check if the mask-expr has a consistent shape with the
9883 outmost WHERE mask-expr. */
9884 if (!resolve_where_shape (cblock
->expr1
, e
))
9885 gfc_error ("WHERE mask at %L has inconsistent shape",
9886 &cblock
->expr1
->where
);
9889 /* the assignment statement of a WHERE statement, or the first
9890 statement in where-body-construct of a WHERE construct */
9891 cnext
= cblock
->next
;
9896 /* WHERE assignment statement */
9899 /* Check shape consistent for WHERE assignment target. */
9900 if (e
&& !resolve_where_shape (cnext
->expr1
, e
))
9901 gfc_error ("WHERE assignment target at %L has "
9902 "inconsistent shape", &cnext
->expr1
->where
);
9906 case EXEC_ASSIGN_CALL
:
9907 resolve_call (cnext
);
9908 if (!cnext
->resolved_sym
->attr
.elemental
)
9909 gfc_error("Non-ELEMENTAL user-defined assignment in WHERE at %L",
9910 &cnext
->ext
.actual
->expr
->where
);
9913 /* WHERE or WHERE construct is part of a where-body-construct */
9915 resolve_where (cnext
, e
);
9919 gfc_error ("Unsupported statement inside WHERE at %L",
9922 /* the next statement within the same where-body-construct */
9923 cnext
= cnext
->next
;
9925 /* the next masked-elsewhere-stmt, elsewhere-stmt, or end-where-stmt */
9926 cblock
= cblock
->block
;
9931 /* Resolve assignment in FORALL construct.
9932 NVAR is the number of FORALL index variables, and VAR_EXPR records the
9933 FORALL index variables. */
9936 gfc_resolve_assign_in_forall (gfc_code
*code
, int nvar
, gfc_expr
**var_expr
)
9940 for (n
= 0; n
< nvar
; n
++)
9942 gfc_symbol
*forall_index
;
9944 forall_index
= var_expr
[n
]->symtree
->n
.sym
;
9946 /* Check whether the assignment target is one of the FORALL index
9948 if ((code
->expr1
->expr_type
== EXPR_VARIABLE
)
9949 && (code
->expr1
->symtree
->n
.sym
== forall_index
))
9950 gfc_error ("Assignment to a FORALL index variable at %L",
9951 &code
->expr1
->where
);
9954 /* If one of the FORALL index variables doesn't appear in the
9955 assignment variable, then there could be a many-to-one
9956 assignment. Emit a warning rather than an error because the
9957 mask could be resolving this problem. */
9958 if (!find_forall_index (code
->expr1
, forall_index
, 0))
9959 gfc_warning (0, "The FORALL with index %qs is not used on the "
9960 "left side of the assignment at %L and so might "
9961 "cause multiple assignment to this object",
9962 var_expr
[n
]->symtree
->name
, &code
->expr1
->where
);
9968 /* Resolve WHERE statement in FORALL construct. */
9971 gfc_resolve_where_code_in_forall (gfc_code
*code
, int nvar
,
9972 gfc_expr
**var_expr
)
9977 cblock
= code
->block
;
9980 /* the assignment statement of a WHERE statement, or the first
9981 statement in where-body-construct of a WHERE construct */
9982 cnext
= cblock
->next
;
9987 /* WHERE assignment statement */
9989 gfc_resolve_assign_in_forall (cnext
, nvar
, var_expr
);
9992 /* WHERE operator assignment statement */
9993 case EXEC_ASSIGN_CALL
:
9994 resolve_call (cnext
);
9995 if (!cnext
->resolved_sym
->attr
.elemental
)
9996 gfc_error("Non-ELEMENTAL user-defined assignment in WHERE at %L",
9997 &cnext
->ext
.actual
->expr
->where
);
10000 /* WHERE or WHERE construct is part of a where-body-construct */
10002 gfc_resolve_where_code_in_forall (cnext
, nvar
, var_expr
);
10006 gfc_error ("Unsupported statement inside WHERE at %L",
10009 /* the next statement within the same where-body-construct */
10010 cnext
= cnext
->next
;
10012 /* the next masked-elsewhere-stmt, elsewhere-stmt, or end-where-stmt */
10013 cblock
= cblock
->block
;
10018 /* Traverse the FORALL body to check whether the following errors exist:
10019 1. For assignment, check if a many-to-one assignment happens.
10020 2. For WHERE statement, check the WHERE body to see if there is any
10021 many-to-one assignment. */
10024 gfc_resolve_forall_body (gfc_code
*code
, int nvar
, gfc_expr
**var_expr
)
10028 c
= code
->block
->next
;
10034 case EXEC_POINTER_ASSIGN
:
10035 gfc_resolve_assign_in_forall (c
, nvar
, var_expr
);
10038 case EXEC_ASSIGN_CALL
:
10042 /* Because the gfc_resolve_blocks() will handle the nested FORALL,
10043 there is no need to handle it here. */
10047 gfc_resolve_where_code_in_forall(c
, nvar
, var_expr
);
10052 /* The next statement in the FORALL body. */
10058 /* Counts the number of iterators needed inside a forall construct, including
10059 nested forall constructs. This is used to allocate the needed memory
10060 in gfc_resolve_forall. */
10063 gfc_count_forall_iterators (gfc_code
*code
)
10065 int max_iters
, sub_iters
, current_iters
;
10066 gfc_forall_iterator
*fa
;
10068 gcc_assert(code
->op
== EXEC_FORALL
);
10072 for (fa
= code
->ext
.forall_iterator
; fa
; fa
= fa
->next
)
10075 code
= code
->block
->next
;
10079 if (code
->op
== EXEC_FORALL
)
10081 sub_iters
= gfc_count_forall_iterators (code
);
10082 if (sub_iters
> max_iters
)
10083 max_iters
= sub_iters
;
10088 return current_iters
+ max_iters
;
10092 /* Given a FORALL construct, first resolve the FORALL iterator, then call
10093 gfc_resolve_forall_body to resolve the FORALL body. */
10096 gfc_resolve_forall (gfc_code
*code
, gfc_namespace
*ns
, int forall_save
)
10098 static gfc_expr
**var_expr
;
10099 static int total_var
= 0;
10100 static int nvar
= 0;
10101 int i
, old_nvar
, tmp
;
10102 gfc_forall_iterator
*fa
;
10106 if (!gfc_notify_std (GFC_STD_F2018_OBS
, "FORALL construct at %L", &code
->loc
))
10109 /* Start to resolve a FORALL construct */
10110 if (forall_save
== 0)
10112 /* Count the total number of FORALL indices in the nested FORALL
10113 construct in order to allocate the VAR_EXPR with proper size. */
10114 total_var
= gfc_count_forall_iterators (code
);
10116 /* Allocate VAR_EXPR with NUMBER_OF_FORALL_INDEX elements. */
10117 var_expr
= XCNEWVEC (gfc_expr
*, total_var
);
10120 /* The information about FORALL iterator, including FORALL indices start, end
10121 and stride. An outer FORALL indice cannot appear in start, end or stride. */
10122 for (fa
= code
->ext
.forall_iterator
; fa
; fa
= fa
->next
)
10124 /* Fortran 20008: C738 (R753). */
10125 if (fa
->var
->ref
&& fa
->var
->ref
->type
== REF_ARRAY
)
10127 gfc_error ("FORALL index-name at %L must be a scalar variable "
10128 "of type integer", &fa
->var
->where
);
10132 /* Check if any outer FORALL index name is the same as the current
10134 for (i
= 0; i
< nvar
; i
++)
10136 if (fa
->var
->symtree
->n
.sym
== var_expr
[i
]->symtree
->n
.sym
)
10137 gfc_error ("An outer FORALL construct already has an index "
10138 "with this name %L", &fa
->var
->where
);
10141 /* Record the current FORALL index. */
10142 var_expr
[nvar
] = gfc_copy_expr (fa
->var
);
10146 /* No memory leak. */
10147 gcc_assert (nvar
<= total_var
);
10150 /* Resolve the FORALL body. */
10151 gfc_resolve_forall_body (code
, nvar
, var_expr
);
10153 /* May call gfc_resolve_forall to resolve the inner FORALL loop. */
10154 gfc_resolve_blocks (code
->block
, ns
);
10158 /* Free only the VAR_EXPRs allocated in this frame. */
10159 for (i
= nvar
; i
< tmp
; i
++)
10160 gfc_free_expr (var_expr
[i
]);
10164 /* We are in the outermost FORALL construct. */
10165 gcc_assert (forall_save
== 0);
10167 /* VAR_EXPR is not needed any more. */
10174 /* Resolve a BLOCK construct statement. */
10177 resolve_block_construct (gfc_code
* code
)
10179 /* Resolve the BLOCK's namespace. */
10180 gfc_resolve (code
->ext
.block
.ns
);
10182 /* For an ASSOCIATE block, the associations (and their targets) are already
10183 resolved during resolve_symbol. */
10187 /* Resolve lists of blocks found in IF, SELECT CASE, WHERE, FORALL, GOTO and
10191 gfc_resolve_blocks (gfc_code
*b
, gfc_namespace
*ns
)
10195 for (; b
; b
= b
->block
)
10197 t
= gfc_resolve_expr (b
->expr1
);
10198 if (!gfc_resolve_expr (b
->expr2
))
10204 if (t
&& b
->expr1
!= NULL
10205 && (b
->expr1
->ts
.type
!= BT_LOGICAL
|| b
->expr1
->rank
!= 0))
10206 gfc_error ("IF clause at %L requires a scalar LOGICAL expression",
10212 && b
->expr1
!= NULL
10213 && (b
->expr1
->ts
.type
!= BT_LOGICAL
|| b
->expr1
->rank
== 0))
10214 gfc_error ("WHERE/ELSEWHERE clause at %L requires a LOGICAL array",
10219 resolve_branch (b
->label1
, b
);
10223 resolve_block_construct (b
);
10227 case EXEC_SELECT_TYPE
:
10230 case EXEC_DO_WHILE
:
10231 case EXEC_DO_CONCURRENT
:
10232 case EXEC_CRITICAL
:
10235 case EXEC_IOLENGTH
:
10239 case EXEC_OMP_ATOMIC
:
10240 case EXEC_OACC_ATOMIC
:
10242 gfc_omp_atomic_op aop
10243 = (gfc_omp_atomic_op
) (b
->ext
.omp_atomic
& GFC_OMP_ATOMIC_MASK
);
10245 /* Verify this before calling gfc_resolve_code, which might
10247 gcc_assert (b
->next
&& b
->next
->op
== EXEC_ASSIGN
);
10248 gcc_assert (((aop
!= GFC_OMP_ATOMIC_CAPTURE
)
10249 && b
->next
->next
== NULL
)
10250 || ((aop
== GFC_OMP_ATOMIC_CAPTURE
)
10251 && b
->next
->next
!= NULL
10252 && b
->next
->next
->op
== EXEC_ASSIGN
10253 && b
->next
->next
->next
== NULL
));
10257 case EXEC_OACC_PARALLEL_LOOP
:
10258 case EXEC_OACC_PARALLEL
:
10259 case EXEC_OACC_KERNELS_LOOP
:
10260 case EXEC_OACC_KERNELS
:
10261 case EXEC_OACC_DATA
:
10262 case EXEC_OACC_HOST_DATA
:
10263 case EXEC_OACC_LOOP
:
10264 case EXEC_OACC_UPDATE
:
10265 case EXEC_OACC_WAIT
:
10266 case EXEC_OACC_CACHE
:
10267 case EXEC_OACC_ENTER_DATA
:
10268 case EXEC_OACC_EXIT_DATA
:
10269 case EXEC_OACC_ROUTINE
:
10270 case EXEC_OMP_CRITICAL
:
10271 case EXEC_OMP_DISTRIBUTE
:
10272 case EXEC_OMP_DISTRIBUTE_PARALLEL_DO
:
10273 case EXEC_OMP_DISTRIBUTE_PARALLEL_DO_SIMD
:
10274 case EXEC_OMP_DISTRIBUTE_SIMD
:
10276 case EXEC_OMP_DO_SIMD
:
10277 case EXEC_OMP_MASTER
:
10278 case EXEC_OMP_ORDERED
:
10279 case EXEC_OMP_PARALLEL
:
10280 case EXEC_OMP_PARALLEL_DO
:
10281 case EXEC_OMP_PARALLEL_DO_SIMD
:
10282 case EXEC_OMP_PARALLEL_SECTIONS
:
10283 case EXEC_OMP_PARALLEL_WORKSHARE
:
10284 case EXEC_OMP_SECTIONS
:
10285 case EXEC_OMP_SIMD
:
10286 case EXEC_OMP_SINGLE
:
10287 case EXEC_OMP_TARGET
:
10288 case EXEC_OMP_TARGET_DATA
:
10289 case EXEC_OMP_TARGET_ENTER_DATA
:
10290 case EXEC_OMP_TARGET_EXIT_DATA
:
10291 case EXEC_OMP_TARGET_PARALLEL
:
10292 case EXEC_OMP_TARGET_PARALLEL_DO
:
10293 case EXEC_OMP_TARGET_PARALLEL_DO_SIMD
:
10294 case EXEC_OMP_TARGET_SIMD
:
10295 case EXEC_OMP_TARGET_TEAMS
:
10296 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE
:
10297 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO
:
10298 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
10299 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_SIMD
:
10300 case EXEC_OMP_TARGET_UPDATE
:
10301 case EXEC_OMP_TASK
:
10302 case EXEC_OMP_TASKGROUP
:
10303 case EXEC_OMP_TASKLOOP
:
10304 case EXEC_OMP_TASKLOOP_SIMD
:
10305 case EXEC_OMP_TASKWAIT
:
10306 case EXEC_OMP_TASKYIELD
:
10307 case EXEC_OMP_TEAMS
:
10308 case EXEC_OMP_TEAMS_DISTRIBUTE
:
10309 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO
:
10310 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
10311 case EXEC_OMP_TEAMS_DISTRIBUTE_SIMD
:
10312 case EXEC_OMP_WORKSHARE
:
10316 gfc_internal_error ("gfc_resolve_blocks(): Bad block type");
10319 gfc_resolve_code (b
->next
, ns
);
10324 /* Does everything to resolve an ordinary assignment. Returns true
10325 if this is an interface assignment. */
10327 resolve_ordinary_assign (gfc_code
*code
, gfc_namespace
*ns
)
10334 symbol_attribute attr
;
10336 if (gfc_extend_assign (code
, ns
))
10340 if (code
->op
== EXEC_ASSIGN_CALL
)
10342 lhs
= code
->ext
.actual
->expr
;
10343 rhsptr
= &code
->ext
.actual
->next
->expr
;
10347 gfc_actual_arglist
* args
;
10348 gfc_typebound_proc
* tbp
;
10350 gcc_assert (code
->op
== EXEC_COMPCALL
);
10352 args
= code
->expr1
->value
.compcall
.actual
;
10354 rhsptr
= &args
->next
->expr
;
10356 tbp
= code
->expr1
->value
.compcall
.tbp
;
10357 gcc_assert (!tbp
->is_generic
);
10360 /* Make a temporary rhs when there is a default initializer
10361 and rhs is the same symbol as the lhs. */
10362 if ((*rhsptr
)->expr_type
== EXPR_VARIABLE
10363 && (*rhsptr
)->symtree
->n
.sym
->ts
.type
== BT_DERIVED
10364 && gfc_has_default_initializer ((*rhsptr
)->symtree
->n
.sym
->ts
.u
.derived
)
10365 && (lhs
->symtree
->n
.sym
== (*rhsptr
)->symtree
->n
.sym
))
10366 *rhsptr
= gfc_get_parentheses (*rhsptr
);
10375 && !gfc_notify_std (GFC_STD_GNU
, "BOZ literal at %L outside "
10376 "a DATA statement and outside INT/REAL/DBLE/CMPLX",
10380 /* Handle the case of a BOZ literal on the RHS. */
10381 if (rhs
->is_boz
&& lhs
->ts
.type
!= BT_INTEGER
)
10384 if (warn_surprising
)
10385 gfc_warning (OPT_Wsurprising
,
10386 "BOZ literal at %L is bitwise transferred "
10387 "non-integer symbol %qs", &code
->loc
,
10388 lhs
->symtree
->n
.sym
->name
);
10390 if (!gfc_convert_boz (rhs
, &lhs
->ts
))
10392 if ((rc
= gfc_range_check (rhs
)) != ARITH_OK
)
10394 if (rc
== ARITH_UNDERFLOW
)
10395 gfc_error ("Arithmetic underflow of bit-wise transferred BOZ at %L"
10396 ". This check can be disabled with the option "
10397 "%<-fno-range-check%>", &rhs
->where
);
10398 else if (rc
== ARITH_OVERFLOW
)
10399 gfc_error ("Arithmetic overflow of bit-wise transferred BOZ at %L"
10400 ". This check can be disabled with the option "
10401 "%<-fno-range-check%>", &rhs
->where
);
10402 else if (rc
== ARITH_NAN
)
10403 gfc_error ("Arithmetic NaN of bit-wise transferred BOZ at %L"
10404 ". This check can be disabled with the option "
10405 "%<-fno-range-check%>", &rhs
->where
);
10410 if (lhs
->ts
.type
== BT_CHARACTER
10411 && warn_character_truncation
)
10413 HOST_WIDE_INT llen
= 0, rlen
= 0;
10414 if (lhs
->ts
.u
.cl
!= NULL
10415 && lhs
->ts
.u
.cl
->length
!= NULL
10416 && lhs
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
)
10417 llen
= gfc_mpz_get_hwi (lhs
->ts
.u
.cl
->length
->value
.integer
);
10419 if (rhs
->expr_type
== EXPR_CONSTANT
)
10420 rlen
= rhs
->value
.character
.length
;
10422 else if (rhs
->ts
.u
.cl
!= NULL
10423 && rhs
->ts
.u
.cl
->length
!= NULL
10424 && rhs
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
)
10425 rlen
= gfc_mpz_get_hwi (rhs
->ts
.u
.cl
->length
->value
.integer
);
10427 if (rlen
&& llen
&& rlen
> llen
)
10428 gfc_warning_now (OPT_Wcharacter_truncation
,
10429 "CHARACTER expression will be truncated "
10430 "in assignment (%ld/%ld) at %L",
10431 (long) llen
, (long) rlen
, &code
->loc
);
10434 /* Ensure that a vector index expression for the lvalue is evaluated
10435 to a temporary if the lvalue symbol is referenced in it. */
10438 for (ref
= lhs
->ref
; ref
; ref
= ref
->next
)
10439 if (ref
->type
== REF_ARRAY
)
10441 for (n
= 0; n
< ref
->u
.ar
.dimen
; n
++)
10442 if (ref
->u
.ar
.dimen_type
[n
] == DIMEN_VECTOR
10443 && gfc_find_sym_in_expr (lhs
->symtree
->n
.sym
,
10444 ref
->u
.ar
.start
[n
]))
10446 = gfc_get_parentheses (ref
->u
.ar
.start
[n
]);
10450 if (gfc_pure (NULL
))
10452 if (lhs
->ts
.type
== BT_DERIVED
10453 && lhs
->expr_type
== EXPR_VARIABLE
10454 && lhs
->ts
.u
.derived
->attr
.pointer_comp
10455 && rhs
->expr_type
== EXPR_VARIABLE
10456 && (gfc_impure_variable (rhs
->symtree
->n
.sym
)
10457 || gfc_is_coindexed (rhs
)))
10459 /* F2008, C1283. */
10460 if (gfc_is_coindexed (rhs
))
10461 gfc_error ("Coindexed expression at %L is assigned to "
10462 "a derived type variable with a POINTER "
10463 "component in a PURE procedure",
10466 gfc_error ("The impure variable at %L is assigned to "
10467 "a derived type variable with a POINTER "
10468 "component in a PURE procedure (12.6)",
10473 /* Fortran 2008, C1283. */
10474 if (gfc_is_coindexed (lhs
))
10476 gfc_error ("Assignment to coindexed variable at %L in a PURE "
10477 "procedure", &rhs
->where
);
10482 if (gfc_implicit_pure (NULL
))
10484 if (lhs
->expr_type
== EXPR_VARIABLE
10485 && lhs
->symtree
->n
.sym
!= gfc_current_ns
->proc_name
10486 && lhs
->symtree
->n
.sym
->ns
!= gfc_current_ns
)
10487 gfc_unset_implicit_pure (NULL
);
10489 if (lhs
->ts
.type
== BT_DERIVED
10490 && lhs
->expr_type
== EXPR_VARIABLE
10491 && lhs
->ts
.u
.derived
->attr
.pointer_comp
10492 && rhs
->expr_type
== EXPR_VARIABLE
10493 && (gfc_impure_variable (rhs
->symtree
->n
.sym
)
10494 || gfc_is_coindexed (rhs
)))
10495 gfc_unset_implicit_pure (NULL
);
10497 /* Fortran 2008, C1283. */
10498 if (gfc_is_coindexed (lhs
))
10499 gfc_unset_implicit_pure (NULL
);
10502 /* F2008, 7.2.1.2. */
10503 attr
= gfc_expr_attr (lhs
);
10504 if (lhs
->ts
.type
== BT_CLASS
&& attr
.allocatable
)
10506 if (attr
.codimension
)
10508 gfc_error ("Assignment to polymorphic coarray at %L is not "
10509 "permitted", &lhs
->where
);
10512 if (!gfc_notify_std (GFC_STD_F2008
, "Assignment to an allocatable "
10513 "polymorphic variable at %L", &lhs
->where
))
10515 if (!flag_realloc_lhs
)
10517 gfc_error ("Assignment to an allocatable polymorphic variable at %L "
10518 "requires %<-frealloc-lhs%>", &lhs
->where
);
10522 else if (lhs
->ts
.type
== BT_CLASS
)
10524 gfc_error ("Nonallocatable variable must not be polymorphic in intrinsic "
10525 "assignment at %L - check that there is a matching specific "
10526 "subroutine for '=' operator", &lhs
->where
);
10530 bool lhs_coindexed
= gfc_is_coindexed (lhs
);
10532 /* F2008, Section 7.2.1.2. */
10533 if (lhs_coindexed
&& gfc_has_ultimate_allocatable (lhs
))
10535 gfc_error ("Coindexed variable must not have an allocatable ultimate "
10536 "component in assignment at %L", &lhs
->where
);
10540 /* Assign the 'data' of a class object to a derived type. */
10541 if (lhs
->ts
.type
== BT_DERIVED
10542 && rhs
->ts
.type
== BT_CLASS
10543 && rhs
->expr_type
!= EXPR_ARRAY
)
10544 gfc_add_data_component (rhs
);
10546 /* Make sure there is a vtable and, in particular, a _copy for the
10548 if (UNLIMITED_POLY (lhs
) && lhs
->rank
&& rhs
->ts
.type
!= BT_CLASS
)
10549 gfc_find_vtab (&rhs
->ts
);
10551 bool caf_convert_to_send
= flag_coarray
== GFC_FCOARRAY_LIB
10553 || (code
->expr2
->expr_type
== EXPR_FUNCTION
10554 && code
->expr2
->value
.function
.isym
10555 && code
->expr2
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
10556 && (code
->expr1
->rank
== 0 || code
->expr2
->rank
!= 0)
10557 && !gfc_expr_attr (rhs
).allocatable
10558 && !gfc_has_vector_subscript (rhs
)));
10560 gfc_check_assign (lhs
, rhs
, 1, !caf_convert_to_send
);
10562 /* Insert a GFC_ISYM_CAF_SEND intrinsic, when the LHS is a coindexed variable.
10563 Additionally, insert this code when the RHS is a CAF as we then use the
10564 GFC_ISYM_CAF_SEND intrinsic just to avoid a temporary; but do not do so if
10565 the LHS is (re)allocatable or has a vector subscript. If the LHS is a
10566 noncoindexed array and the RHS is a coindexed scalar, use the normal code
10568 if (caf_convert_to_send
)
10570 if (code
->expr2
->expr_type
== EXPR_FUNCTION
10571 && code
->expr2
->value
.function
.isym
10572 && code
->expr2
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
)
10573 remove_caf_get_intrinsic (code
->expr2
);
10574 code
->op
= EXEC_CALL
;
10575 gfc_get_sym_tree (GFC_PREFIX ("caf_send"), ns
, &code
->symtree
, true);
10576 code
->resolved_sym
= code
->symtree
->n
.sym
;
10577 code
->resolved_sym
->attr
.flavor
= FL_PROCEDURE
;
10578 code
->resolved_sym
->attr
.intrinsic
= 1;
10579 code
->resolved_sym
->attr
.subroutine
= 1;
10580 code
->resolved_isym
= gfc_intrinsic_subroutine_by_id (GFC_ISYM_CAF_SEND
);
10581 gfc_commit_symbol (code
->resolved_sym
);
10582 code
->ext
.actual
= gfc_get_actual_arglist ();
10583 code
->ext
.actual
->expr
= lhs
;
10584 code
->ext
.actual
->next
= gfc_get_actual_arglist ();
10585 code
->ext
.actual
->next
->expr
= rhs
;
10586 code
->expr1
= NULL
;
10587 code
->expr2
= NULL
;
10594 /* Add a component reference onto an expression. */
10597 add_comp_ref (gfc_expr
*e
, gfc_component
*c
)
10602 ref
= &((*ref
)->next
);
10603 *ref
= gfc_get_ref ();
10604 (*ref
)->type
= REF_COMPONENT
;
10605 (*ref
)->u
.c
.sym
= e
->ts
.u
.derived
;
10606 (*ref
)->u
.c
.component
= c
;
10609 /* Add a full array ref, as necessary. */
10612 gfc_add_full_array_ref (e
, c
->as
);
10613 e
->rank
= c
->as
->rank
;
10618 /* Build an assignment. Keep the argument 'op' for future use, so that
10619 pointer assignments can be made. */
10622 build_assignment (gfc_exec_op op
, gfc_expr
*expr1
, gfc_expr
*expr2
,
10623 gfc_component
*comp1
, gfc_component
*comp2
, locus loc
)
10625 gfc_code
*this_code
;
10627 this_code
= gfc_get_code (op
);
10628 this_code
->next
= NULL
;
10629 this_code
->expr1
= gfc_copy_expr (expr1
);
10630 this_code
->expr2
= gfc_copy_expr (expr2
);
10631 this_code
->loc
= loc
;
10632 if (comp1
&& comp2
)
10634 add_comp_ref (this_code
->expr1
, comp1
);
10635 add_comp_ref (this_code
->expr2
, comp2
);
10642 /* Makes a temporary variable expression based on the characteristics of
10643 a given variable expression. */
10646 get_temp_from_expr (gfc_expr
*e
, gfc_namespace
*ns
)
10648 static int serial
= 0;
10649 char name
[GFC_MAX_SYMBOL_LEN
];
10651 gfc_array_spec
*as
;
10652 gfc_array_ref
*aref
;
10655 sprintf (name
, GFC_PREFIX("DA%d"), serial
++);
10656 gfc_get_sym_tree (name
, ns
, &tmp
, false);
10657 gfc_add_type (tmp
->n
.sym
, &e
->ts
, NULL
);
10659 if (e
->expr_type
== EXPR_CONSTANT
&& e
->ts
.type
== BT_CHARACTER
)
10660 tmp
->n
.sym
->ts
.u
.cl
->length
= gfc_get_int_expr (gfc_charlen_int_kind
,
10662 e
->value
.character
.length
);
10668 /* Obtain the arrayspec for the temporary. */
10669 if (e
->rank
&& e
->expr_type
!= EXPR_ARRAY
10670 && e
->expr_type
!= EXPR_FUNCTION
10671 && e
->expr_type
!= EXPR_OP
)
10673 aref
= gfc_find_array_ref (e
);
10674 if (e
->expr_type
== EXPR_VARIABLE
10675 && e
->symtree
->n
.sym
->as
== aref
->as
)
10679 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
10680 if (ref
->type
== REF_COMPONENT
10681 && ref
->u
.c
.component
->as
== aref
->as
)
10689 /* Add the attributes and the arrayspec to the temporary. */
10690 tmp
->n
.sym
->attr
= gfc_expr_attr (e
);
10691 tmp
->n
.sym
->attr
.function
= 0;
10692 tmp
->n
.sym
->attr
.result
= 0;
10693 tmp
->n
.sym
->attr
.flavor
= FL_VARIABLE
;
10694 tmp
->n
.sym
->attr
.dummy
= 0;
10695 tmp
->n
.sym
->attr
.intent
= INTENT_UNKNOWN
;
10699 tmp
->n
.sym
->as
= gfc_copy_array_spec (as
);
10702 if (as
->type
== AS_DEFERRED
)
10703 tmp
->n
.sym
->attr
.allocatable
= 1;
10705 else if (e
->rank
&& (e
->expr_type
== EXPR_ARRAY
10706 || e
->expr_type
== EXPR_FUNCTION
10707 || e
->expr_type
== EXPR_OP
))
10709 tmp
->n
.sym
->as
= gfc_get_array_spec ();
10710 tmp
->n
.sym
->as
->type
= AS_DEFERRED
;
10711 tmp
->n
.sym
->as
->rank
= e
->rank
;
10712 tmp
->n
.sym
->attr
.allocatable
= 1;
10713 tmp
->n
.sym
->attr
.dimension
= 1;
10716 tmp
->n
.sym
->attr
.dimension
= 0;
10718 gfc_set_sym_referenced (tmp
->n
.sym
);
10719 gfc_commit_symbol (tmp
->n
.sym
);
10720 e
= gfc_lval_expr_from_sym (tmp
->n
.sym
);
10722 /* Should the lhs be a section, use its array ref for the
10723 temporary expression. */
10724 if (aref
&& aref
->type
!= AR_FULL
)
10726 gfc_free_ref_list (e
->ref
);
10727 e
->ref
= gfc_copy_ref (ref
);
10733 /* Add one line of code to the code chain, making sure that 'head' and
10734 'tail' are appropriately updated. */
10737 add_code_to_chain (gfc_code
**this_code
, gfc_code
**head
, gfc_code
**tail
)
10739 gcc_assert (this_code
);
10741 *head
= *tail
= *this_code
;
10743 *tail
= gfc_append_code (*tail
, *this_code
);
10748 /* Counts the potential number of part array references that would
10749 result from resolution of typebound defined assignments. */
10752 nonscalar_typebound_assign (gfc_symbol
*derived
, int depth
)
10755 int c_depth
= 0, t_depth
;
10757 for (c
= derived
->components
; c
; c
= c
->next
)
10759 if ((!gfc_bt_struct (c
->ts
.type
)
10761 || c
->attr
.allocatable
10762 || c
->attr
.proc_pointer_comp
10763 || c
->attr
.class_pointer
10764 || c
->attr
.proc_pointer
)
10765 && !c
->attr
.defined_assign_comp
)
10768 if (c
->as
&& c_depth
== 0)
10771 if (c
->ts
.u
.derived
->attr
.defined_assign_comp
)
10772 t_depth
= nonscalar_typebound_assign (c
->ts
.u
.derived
,
10777 c_depth
= t_depth
> c_depth
? t_depth
: c_depth
;
10779 return depth
+ c_depth
;
10783 /* Implement 7.2.1.3 of the F08 standard:
10784 "An intrinsic assignment where the variable is of derived type is
10785 performed as if each component of the variable were assigned from the
10786 corresponding component of expr using pointer assignment (7.2.2) for
10787 each pointer component, defined assignment for each nonpointer
10788 nonallocatable component of a type that has a type-bound defined
10789 assignment consistent with the component, intrinsic assignment for
10790 each other nonpointer nonallocatable component, ..."
10792 The pointer assignments are taken care of by the intrinsic
10793 assignment of the structure itself. This function recursively adds
10794 defined assignments where required. The recursion is accomplished
10795 by calling gfc_resolve_code.
10797 When the lhs in a defined assignment has intent INOUT, we need a
10798 temporary for the lhs. In pseudo-code:
10800 ! Only call function lhs once.
10801 if (lhs is not a constant or an variable)
10804 ! Do the intrinsic assignment
10806 ! Now do the defined assignments
10807 do over components with typebound defined assignment [%cmp]
10808 #if one component's assignment procedure is INOUT
10810 #if expr2 non-variable
10816 t1%cmp {defined=} expr2%cmp
10822 expr1%cmp {defined=} expr2%cmp
10826 /* The temporary assignments have to be put on top of the additional
10827 code to avoid the result being changed by the intrinsic assignment.
10829 static int component_assignment_level
= 0;
10830 static gfc_code
*tmp_head
= NULL
, *tmp_tail
= NULL
;
10833 generate_component_assignments (gfc_code
**code
, gfc_namespace
*ns
)
10835 gfc_component
*comp1
, *comp2
;
10836 gfc_code
*this_code
= NULL
, *head
= NULL
, *tail
= NULL
;
10838 int error_count
, depth
;
10840 gfc_get_errors (NULL
, &error_count
);
10842 /* Filter out continuing processing after an error. */
10844 || (*code
)->expr1
->ts
.type
!= BT_DERIVED
10845 || (*code
)->expr2
->ts
.type
!= BT_DERIVED
)
10848 /* TODO: Handle more than one part array reference in assignments. */
10849 depth
= nonscalar_typebound_assign ((*code
)->expr1
->ts
.u
.derived
,
10850 (*code
)->expr1
->rank
? 1 : 0);
10853 gfc_warning (0, "TODO: type-bound defined assignment(s) at %L not "
10854 "done because multiple part array references would "
10855 "occur in intermediate expressions.", &(*code
)->loc
);
10859 component_assignment_level
++;
10861 /* Create a temporary so that functions get called only once. */
10862 if ((*code
)->expr2
->expr_type
!= EXPR_VARIABLE
10863 && (*code
)->expr2
->expr_type
!= EXPR_CONSTANT
)
10865 gfc_expr
*tmp_expr
;
10867 /* Assign the rhs to the temporary. */
10868 tmp_expr
= get_temp_from_expr ((*code
)->expr1
, ns
);
10869 this_code
= build_assignment (EXEC_ASSIGN
,
10870 tmp_expr
, (*code
)->expr2
,
10871 NULL
, NULL
, (*code
)->loc
);
10872 /* Add the code and substitute the rhs expression. */
10873 add_code_to_chain (&this_code
, &tmp_head
, &tmp_tail
);
10874 gfc_free_expr ((*code
)->expr2
);
10875 (*code
)->expr2
= tmp_expr
;
10878 /* Do the intrinsic assignment. This is not needed if the lhs is one
10879 of the temporaries generated here, since the intrinsic assignment
10880 to the final result already does this. */
10881 if ((*code
)->expr1
->symtree
->n
.sym
->name
[2] != '@')
10883 this_code
= build_assignment (EXEC_ASSIGN
,
10884 (*code
)->expr1
, (*code
)->expr2
,
10885 NULL
, NULL
, (*code
)->loc
);
10886 add_code_to_chain (&this_code
, &head
, &tail
);
10889 comp1
= (*code
)->expr1
->ts
.u
.derived
->components
;
10890 comp2
= (*code
)->expr2
->ts
.u
.derived
->components
;
10893 for (; comp1
; comp1
= comp1
->next
, comp2
= comp2
->next
)
10895 bool inout
= false;
10897 /* The intrinsic assignment does the right thing for pointers
10898 of all kinds and allocatable components. */
10899 if (!gfc_bt_struct (comp1
->ts
.type
)
10900 || comp1
->attr
.pointer
10901 || comp1
->attr
.allocatable
10902 || comp1
->attr
.proc_pointer_comp
10903 || comp1
->attr
.class_pointer
10904 || comp1
->attr
.proc_pointer
)
10907 /* Make an assigment for this component. */
10908 this_code
= build_assignment (EXEC_ASSIGN
,
10909 (*code
)->expr1
, (*code
)->expr2
,
10910 comp1
, comp2
, (*code
)->loc
);
10912 /* Convert the assignment if there is a defined assignment for
10913 this type. Otherwise, using the call from gfc_resolve_code,
10914 recurse into its components. */
10915 gfc_resolve_code (this_code
, ns
);
10917 if (this_code
->op
== EXEC_ASSIGN_CALL
)
10919 gfc_formal_arglist
*dummy_args
;
10921 /* Check that there is a typebound defined assignment. If not,
10922 then this must be a module defined assignment. We cannot
10923 use the defined_assign_comp attribute here because it must
10924 be this derived type that has the defined assignment and not
10926 if (!(comp1
->ts
.u
.derived
->f2k_derived
10927 && comp1
->ts
.u
.derived
->f2k_derived
10928 ->tb_op
[INTRINSIC_ASSIGN
]))
10930 gfc_free_statements (this_code
);
10935 /* If the first argument of the subroutine has intent INOUT
10936 a temporary must be generated and used instead. */
10937 rsym
= this_code
->resolved_sym
;
10938 dummy_args
= gfc_sym_get_dummy_args (rsym
);
10940 && dummy_args
->sym
->attr
.intent
== INTENT_INOUT
)
10942 gfc_code
*temp_code
;
10945 /* Build the temporary required for the assignment and put
10946 it at the head of the generated code. */
10949 t1
= get_temp_from_expr ((*code
)->expr1
, ns
);
10950 temp_code
= build_assignment (EXEC_ASSIGN
,
10951 t1
, (*code
)->expr1
,
10952 NULL
, NULL
, (*code
)->loc
);
10954 /* For allocatable LHS, check whether it is allocated. Note
10955 that allocatable components with defined assignment are
10956 not yet support. See PR 57696. */
10957 if ((*code
)->expr1
->symtree
->n
.sym
->attr
.allocatable
)
10961 gfc_lval_expr_from_sym ((*code
)->expr1
->symtree
->n
.sym
);
10962 block
= gfc_get_code (EXEC_IF
);
10963 block
->block
= gfc_get_code (EXEC_IF
);
10964 block
->block
->expr1
10965 = gfc_build_intrinsic_call (ns
,
10966 GFC_ISYM_ALLOCATED
, "allocated",
10967 (*code
)->loc
, 1, e
);
10968 block
->block
->next
= temp_code
;
10971 add_code_to_chain (&temp_code
, &tmp_head
, &tmp_tail
);
10974 /* Replace the first actual arg with the component of the
10976 gfc_free_expr (this_code
->ext
.actual
->expr
);
10977 this_code
->ext
.actual
->expr
= gfc_copy_expr (t1
);
10978 add_comp_ref (this_code
->ext
.actual
->expr
, comp1
);
10980 /* If the LHS variable is allocatable and wasn't allocated and
10981 the temporary is allocatable, pointer assign the address of
10982 the freshly allocated LHS to the temporary. */
10983 if ((*code
)->expr1
->symtree
->n
.sym
->attr
.allocatable
10984 && gfc_expr_attr ((*code
)->expr1
).allocatable
)
10989 cond
= gfc_get_expr ();
10990 cond
->ts
.type
= BT_LOGICAL
;
10991 cond
->ts
.kind
= gfc_default_logical_kind
;
10992 cond
->expr_type
= EXPR_OP
;
10993 cond
->where
= (*code
)->loc
;
10994 cond
->value
.op
.op
= INTRINSIC_NOT
;
10995 cond
->value
.op
.op1
= gfc_build_intrinsic_call (ns
,
10996 GFC_ISYM_ALLOCATED
, "allocated",
10997 (*code
)->loc
, 1, gfc_copy_expr (t1
));
10998 block
= gfc_get_code (EXEC_IF
);
10999 block
->block
= gfc_get_code (EXEC_IF
);
11000 block
->block
->expr1
= cond
;
11001 block
->block
->next
= build_assignment (EXEC_POINTER_ASSIGN
,
11002 t1
, (*code
)->expr1
,
11003 NULL
, NULL
, (*code
)->loc
);
11004 add_code_to_chain (&block
, &head
, &tail
);
11008 else if (this_code
->op
== EXEC_ASSIGN
&& !this_code
->next
)
11010 /* Don't add intrinsic assignments since they are already
11011 effected by the intrinsic assignment of the structure. */
11012 gfc_free_statements (this_code
);
11017 add_code_to_chain (&this_code
, &head
, &tail
);
11021 /* Transfer the value to the final result. */
11022 this_code
= build_assignment (EXEC_ASSIGN
,
11023 (*code
)->expr1
, t1
,
11024 comp1
, comp2
, (*code
)->loc
);
11025 add_code_to_chain (&this_code
, &head
, &tail
);
11029 /* Put the temporary assignments at the top of the generated code. */
11030 if (tmp_head
&& component_assignment_level
== 1)
11032 gfc_append_code (tmp_head
, head
);
11034 tmp_head
= tmp_tail
= NULL
;
11037 // If we did a pointer assignment - thus, we need to ensure that the LHS is
11038 // not accidentally deallocated. Hence, nullify t1.
11039 if (t1
&& (*code
)->expr1
->symtree
->n
.sym
->attr
.allocatable
11040 && gfc_expr_attr ((*code
)->expr1
).allocatable
)
11046 e
= gfc_lval_expr_from_sym ((*code
)->expr1
->symtree
->n
.sym
);
11047 cond
= gfc_build_intrinsic_call (ns
, GFC_ISYM_ASSOCIATED
, "associated",
11048 (*code
)->loc
, 2, gfc_copy_expr (t1
), e
);
11049 block
= gfc_get_code (EXEC_IF
);
11050 block
->block
= gfc_get_code (EXEC_IF
);
11051 block
->block
->expr1
= cond
;
11052 block
->block
->next
= build_assignment (EXEC_POINTER_ASSIGN
,
11053 t1
, gfc_get_null_expr (&(*code
)->loc
),
11054 NULL
, NULL
, (*code
)->loc
);
11055 gfc_append_code (tail
, block
);
11059 /* Now attach the remaining code chain to the input code. Step on
11060 to the end of the new code since resolution is complete. */
11061 gcc_assert ((*code
)->op
== EXEC_ASSIGN
);
11062 tail
->next
= (*code
)->next
;
11063 /* Overwrite 'code' because this would place the intrinsic assignment
11064 before the temporary for the lhs is created. */
11065 gfc_free_expr ((*code
)->expr1
);
11066 gfc_free_expr ((*code
)->expr2
);
11072 component_assignment_level
--;
11076 /* F2008: Pointer function assignments are of the form:
11077 ptr_fcn (args) = expr
11078 This function breaks these assignments into two statements:
11079 temporary_pointer => ptr_fcn(args)
11080 temporary_pointer = expr */
11083 resolve_ptr_fcn_assign (gfc_code
**code
, gfc_namespace
*ns
)
11085 gfc_expr
*tmp_ptr_expr
;
11086 gfc_code
*this_code
;
11087 gfc_component
*comp
;
11090 if ((*code
)->expr1
->expr_type
!= EXPR_FUNCTION
)
11093 /* Even if standard does not support this feature, continue to build
11094 the two statements to avoid upsetting frontend_passes.c. */
11095 gfc_notify_std (GFC_STD_F2008
, "Pointer procedure assignment at "
11096 "%L", &(*code
)->loc
);
11098 comp
= gfc_get_proc_ptr_comp ((*code
)->expr1
);
11101 s
= comp
->ts
.interface
;
11103 s
= (*code
)->expr1
->symtree
->n
.sym
;
11105 if (s
== NULL
|| !s
->result
->attr
.pointer
)
11107 gfc_error ("The function result on the lhs of the assignment at "
11108 "%L must have the pointer attribute.",
11109 &(*code
)->expr1
->where
);
11110 (*code
)->op
= EXEC_NOP
;
11114 tmp_ptr_expr
= get_temp_from_expr ((*code
)->expr2
, ns
);
11116 /* get_temp_from_expression is set up for ordinary assignments. To that
11117 end, where array bounds are not known, arrays are made allocatable.
11118 Change the temporary to a pointer here. */
11119 tmp_ptr_expr
->symtree
->n
.sym
->attr
.pointer
= 1;
11120 tmp_ptr_expr
->symtree
->n
.sym
->attr
.allocatable
= 0;
11121 tmp_ptr_expr
->where
= (*code
)->loc
;
11123 this_code
= build_assignment (EXEC_ASSIGN
,
11124 tmp_ptr_expr
, (*code
)->expr2
,
11125 NULL
, NULL
, (*code
)->loc
);
11126 this_code
->next
= (*code
)->next
;
11127 (*code
)->next
= this_code
;
11128 (*code
)->op
= EXEC_POINTER_ASSIGN
;
11129 (*code
)->expr2
= (*code
)->expr1
;
11130 (*code
)->expr1
= tmp_ptr_expr
;
11136 /* Deferred character length assignments from an operator expression
11137 require a temporary because the character length of the lhs can
11138 change in the course of the assignment. */
11141 deferred_op_assign (gfc_code
**code
, gfc_namespace
*ns
)
11143 gfc_expr
*tmp_expr
;
11144 gfc_code
*this_code
;
11146 if (!((*code
)->expr1
->ts
.type
== BT_CHARACTER
11147 && (*code
)->expr1
->ts
.deferred
&& (*code
)->expr1
->rank
11148 && (*code
)->expr2
->expr_type
== EXPR_OP
))
11151 if (!gfc_check_dependency ((*code
)->expr1
, (*code
)->expr2
, 1))
11154 tmp_expr
= get_temp_from_expr ((*code
)->expr1
, ns
);
11155 tmp_expr
->where
= (*code
)->loc
;
11157 /* A new charlen is required to ensure that the variable string
11158 length is different to that of the original lhs. */
11159 tmp_expr
->ts
.u
.cl
= gfc_get_charlen();
11160 tmp_expr
->symtree
->n
.sym
->ts
.u
.cl
= tmp_expr
->ts
.u
.cl
;
11161 tmp_expr
->ts
.u
.cl
->next
= (*code
)->expr2
->ts
.u
.cl
->next
;
11162 (*code
)->expr2
->ts
.u
.cl
->next
= tmp_expr
->ts
.u
.cl
;
11164 tmp_expr
->symtree
->n
.sym
->ts
.deferred
= 1;
11166 this_code
= build_assignment (EXEC_ASSIGN
,
11168 gfc_copy_expr (tmp_expr
),
11169 NULL
, NULL
, (*code
)->loc
);
11171 (*code
)->expr1
= tmp_expr
;
11173 this_code
->next
= (*code
)->next
;
11174 (*code
)->next
= this_code
;
11180 /* Given a block of code, recursively resolve everything pointed to by this
11184 gfc_resolve_code (gfc_code
*code
, gfc_namespace
*ns
)
11186 int omp_workshare_save
;
11187 int forall_save
, do_concurrent_save
;
11191 frame
.prev
= cs_base
;
11195 find_reachable_labels (code
);
11197 for (; code
; code
= code
->next
)
11199 frame
.current
= code
;
11200 forall_save
= forall_flag
;
11201 do_concurrent_save
= gfc_do_concurrent_flag
;
11203 if (code
->op
== EXEC_FORALL
)
11206 gfc_resolve_forall (code
, ns
, forall_save
);
11209 else if (code
->block
)
11211 omp_workshare_save
= -1;
11214 case EXEC_OACC_PARALLEL_LOOP
:
11215 case EXEC_OACC_PARALLEL
:
11216 case EXEC_OACC_KERNELS_LOOP
:
11217 case EXEC_OACC_KERNELS
:
11218 case EXEC_OACC_DATA
:
11219 case EXEC_OACC_HOST_DATA
:
11220 case EXEC_OACC_LOOP
:
11221 gfc_resolve_oacc_blocks (code
, ns
);
11223 case EXEC_OMP_PARALLEL_WORKSHARE
:
11224 omp_workshare_save
= omp_workshare_flag
;
11225 omp_workshare_flag
= 1;
11226 gfc_resolve_omp_parallel_blocks (code
, ns
);
11228 case EXEC_OMP_PARALLEL
:
11229 case EXEC_OMP_PARALLEL_DO
:
11230 case EXEC_OMP_PARALLEL_DO_SIMD
:
11231 case EXEC_OMP_PARALLEL_SECTIONS
:
11232 case EXEC_OMP_TARGET_PARALLEL
:
11233 case EXEC_OMP_TARGET_PARALLEL_DO
:
11234 case EXEC_OMP_TARGET_PARALLEL_DO_SIMD
:
11235 case EXEC_OMP_TARGET_TEAMS
:
11236 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE
:
11237 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO
:
11238 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
11239 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_SIMD
:
11240 case EXEC_OMP_TASK
:
11241 case EXEC_OMP_TASKLOOP
:
11242 case EXEC_OMP_TASKLOOP_SIMD
:
11243 case EXEC_OMP_TEAMS
:
11244 case EXEC_OMP_TEAMS_DISTRIBUTE
:
11245 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO
:
11246 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
11247 case EXEC_OMP_TEAMS_DISTRIBUTE_SIMD
:
11248 omp_workshare_save
= omp_workshare_flag
;
11249 omp_workshare_flag
= 0;
11250 gfc_resolve_omp_parallel_blocks (code
, ns
);
11252 case EXEC_OMP_DISTRIBUTE
:
11253 case EXEC_OMP_DISTRIBUTE_SIMD
:
11255 case EXEC_OMP_DO_SIMD
:
11256 case EXEC_OMP_SIMD
:
11257 case EXEC_OMP_TARGET_SIMD
:
11258 gfc_resolve_omp_do_blocks (code
, ns
);
11260 case EXEC_SELECT_TYPE
:
11261 /* Blocks are handled in resolve_select_type because we have
11262 to transform the SELECT TYPE into ASSOCIATE first. */
11264 case EXEC_DO_CONCURRENT
:
11265 gfc_do_concurrent_flag
= 1;
11266 gfc_resolve_blocks (code
->block
, ns
);
11267 gfc_do_concurrent_flag
= 2;
11269 case EXEC_OMP_WORKSHARE
:
11270 omp_workshare_save
= omp_workshare_flag
;
11271 omp_workshare_flag
= 1;
11274 gfc_resolve_blocks (code
->block
, ns
);
11278 if (omp_workshare_save
!= -1)
11279 omp_workshare_flag
= omp_workshare_save
;
11283 if (code
->op
!= EXEC_COMPCALL
&& code
->op
!= EXEC_CALL_PPC
)
11284 t
= gfc_resolve_expr (code
->expr1
);
11285 forall_flag
= forall_save
;
11286 gfc_do_concurrent_flag
= do_concurrent_save
;
11288 if (!gfc_resolve_expr (code
->expr2
))
11291 if (code
->op
== EXEC_ALLOCATE
11292 && !gfc_resolve_expr (code
->expr3
))
11298 case EXEC_END_BLOCK
:
11299 case EXEC_END_NESTED_BLOCK
:
11303 case EXEC_ERROR_STOP
:
11305 case EXEC_CONTINUE
:
11307 case EXEC_ASSIGN_CALL
:
11310 case EXEC_CRITICAL
:
11311 resolve_critical (code
);
11314 case EXEC_SYNC_ALL
:
11315 case EXEC_SYNC_IMAGES
:
11316 case EXEC_SYNC_MEMORY
:
11317 resolve_sync (code
);
11322 case EXEC_EVENT_POST
:
11323 case EXEC_EVENT_WAIT
:
11324 resolve_lock_unlock_event (code
);
11327 case EXEC_FAIL_IMAGE
:
11328 case EXEC_FORM_TEAM
:
11329 case EXEC_CHANGE_TEAM
:
11330 case EXEC_END_TEAM
:
11331 case EXEC_SYNC_TEAM
:
11335 /* Keep track of which entry we are up to. */
11336 current_entry_id
= code
->ext
.entry
->id
;
11340 resolve_where (code
, NULL
);
11344 if (code
->expr1
!= NULL
)
11346 if (code
->expr1
->ts
.type
!= BT_INTEGER
)
11347 gfc_error ("ASSIGNED GOTO statement at %L requires an "
11348 "INTEGER variable", &code
->expr1
->where
);
11349 else if (code
->expr1
->symtree
->n
.sym
->attr
.assign
!= 1)
11350 gfc_error ("Variable %qs has not been assigned a target "
11351 "label at %L", code
->expr1
->symtree
->n
.sym
->name
,
11352 &code
->expr1
->where
);
11355 resolve_branch (code
->label1
, code
);
11359 if (code
->expr1
!= NULL
11360 && (code
->expr1
->ts
.type
!= BT_INTEGER
|| code
->expr1
->rank
))
11361 gfc_error ("Alternate RETURN statement at %L requires a SCALAR-"
11362 "INTEGER return specifier", &code
->expr1
->where
);
11365 case EXEC_INIT_ASSIGN
:
11366 case EXEC_END_PROCEDURE
:
11373 /* Remove a GFC_ISYM_CAF_GET inserted for a coindexed variable on
11375 if (code
->expr1
->expr_type
== EXPR_FUNCTION
11376 && code
->expr1
->value
.function
.isym
11377 && code
->expr1
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
)
11378 remove_caf_get_intrinsic (code
->expr1
);
11380 /* If this is a pointer function in an lvalue variable context,
11381 the new code will have to be resolved afresh. This is also the
11382 case with an error, where the code is transformed into NOP to
11383 prevent ICEs downstream. */
11384 if (resolve_ptr_fcn_assign (&code
, ns
)
11385 || code
->op
== EXEC_NOP
)
11388 if (!gfc_check_vardef_context (code
->expr1
, false, false, false,
11392 if (resolve_ordinary_assign (code
, ns
))
11394 if (code
->op
== EXEC_COMPCALL
)
11400 /* Check for dependencies in deferred character length array
11401 assignments and generate a temporary, if necessary. */
11402 if (code
->op
== EXEC_ASSIGN
&& deferred_op_assign (&code
, ns
))
11405 /* F03 7.4.1.3 for non-allocatable, non-pointer components. */
11406 if (code
->op
!= EXEC_CALL
&& code
->expr1
->ts
.type
== BT_DERIVED
11407 && code
->expr1
->ts
.u
.derived
11408 && code
->expr1
->ts
.u
.derived
->attr
.defined_assign_comp
)
11409 generate_component_assignments (&code
, ns
);
11413 case EXEC_LABEL_ASSIGN
:
11414 if (code
->label1
->defined
== ST_LABEL_UNKNOWN
)
11415 gfc_error ("Label %d referenced at %L is never defined",
11416 code
->label1
->value
, &code
->label1
->where
);
11418 && (code
->expr1
->expr_type
!= EXPR_VARIABLE
11419 || code
->expr1
->symtree
->n
.sym
->ts
.type
!= BT_INTEGER
11420 || code
->expr1
->symtree
->n
.sym
->ts
.kind
11421 != gfc_default_integer_kind
11422 || code
->expr1
->symtree
->n
.sym
->as
!= NULL
))
11423 gfc_error ("ASSIGN statement at %L requires a scalar "
11424 "default INTEGER variable", &code
->expr1
->where
);
11427 case EXEC_POINTER_ASSIGN
:
11434 /* This is both a variable definition and pointer assignment
11435 context, so check both of them. For rank remapping, a final
11436 array ref may be present on the LHS and fool gfc_expr_attr
11437 used in gfc_check_vardef_context. Remove it. */
11438 e
= remove_last_array_ref (code
->expr1
);
11439 t
= gfc_check_vardef_context (e
, true, false, false,
11440 _("pointer assignment"));
11442 t
= gfc_check_vardef_context (e
, false, false, false,
11443 _("pointer assignment"));
11446 t
= gfc_check_pointer_assign (code
->expr1
, code
->expr2
, !t
) && t
;
11451 /* Assigning a class object always is a regular assign. */
11452 if (code
->expr2
->ts
.type
== BT_CLASS
11453 && code
->expr1
->ts
.type
== BT_CLASS
11454 && !CLASS_DATA (code
->expr2
)->attr
.dimension
11455 && !(gfc_expr_attr (code
->expr1
).proc_pointer
11456 && code
->expr2
->expr_type
== EXPR_VARIABLE
11457 && code
->expr2
->symtree
->n
.sym
->attr
.flavor
11459 code
->op
= EXEC_ASSIGN
;
11463 case EXEC_ARITHMETIC_IF
:
11465 gfc_expr
*e
= code
->expr1
;
11467 gfc_resolve_expr (e
);
11468 if (e
->expr_type
== EXPR_NULL
)
11469 gfc_error ("Invalid NULL at %L", &e
->where
);
11471 if (t
&& (e
->rank
> 0
11472 || !(e
->ts
.type
== BT_REAL
|| e
->ts
.type
== BT_INTEGER
)))
11473 gfc_error ("Arithmetic IF statement at %L requires a scalar "
11474 "REAL or INTEGER expression", &e
->where
);
11476 resolve_branch (code
->label1
, code
);
11477 resolve_branch (code
->label2
, code
);
11478 resolve_branch (code
->label3
, code
);
11483 if (t
&& code
->expr1
!= NULL
11484 && (code
->expr1
->ts
.type
!= BT_LOGICAL
11485 || code
->expr1
->rank
!= 0))
11486 gfc_error ("IF clause at %L requires a scalar LOGICAL expression",
11487 &code
->expr1
->where
);
11492 resolve_call (code
);
11495 case EXEC_COMPCALL
:
11497 resolve_typebound_subroutine (code
);
11500 case EXEC_CALL_PPC
:
11501 resolve_ppc_call (code
);
11505 /* Select is complicated. Also, a SELECT construct could be
11506 a transformed computed GOTO. */
11507 resolve_select (code
, false);
11510 case EXEC_SELECT_TYPE
:
11511 resolve_select_type (code
, ns
);
11515 resolve_block_construct (code
);
11519 if (code
->ext
.iterator
!= NULL
)
11521 gfc_iterator
*iter
= code
->ext
.iterator
;
11522 if (gfc_resolve_iterator (iter
, true, false))
11523 gfc_resolve_do_iterator (code
, iter
->var
->symtree
->n
.sym
,
11528 case EXEC_DO_WHILE
:
11529 if (code
->expr1
== NULL
)
11530 gfc_internal_error ("gfc_resolve_code(): No expression on "
11533 && (code
->expr1
->rank
!= 0
11534 || code
->expr1
->ts
.type
!= BT_LOGICAL
))
11535 gfc_error ("Exit condition of DO WHILE loop at %L must be "
11536 "a scalar LOGICAL expression", &code
->expr1
->where
);
11539 case EXEC_ALLOCATE
:
11541 resolve_allocate_deallocate (code
, "ALLOCATE");
11545 case EXEC_DEALLOCATE
:
11547 resolve_allocate_deallocate (code
, "DEALLOCATE");
11552 if (!gfc_resolve_open (code
->ext
.open
))
11555 resolve_branch (code
->ext
.open
->err
, code
);
11559 if (!gfc_resolve_close (code
->ext
.close
))
11562 resolve_branch (code
->ext
.close
->err
, code
);
11565 case EXEC_BACKSPACE
:
11569 if (!gfc_resolve_filepos (code
->ext
.filepos
, &code
->loc
))
11572 resolve_branch (code
->ext
.filepos
->err
, code
);
11576 if (!gfc_resolve_inquire (code
->ext
.inquire
))
11579 resolve_branch (code
->ext
.inquire
->err
, code
);
11582 case EXEC_IOLENGTH
:
11583 gcc_assert (code
->ext
.inquire
!= NULL
);
11584 if (!gfc_resolve_inquire (code
->ext
.inquire
))
11587 resolve_branch (code
->ext
.inquire
->err
, code
);
11591 if (!gfc_resolve_wait (code
->ext
.wait
))
11594 resolve_branch (code
->ext
.wait
->err
, code
);
11595 resolve_branch (code
->ext
.wait
->end
, code
);
11596 resolve_branch (code
->ext
.wait
->eor
, code
);
11601 if (!gfc_resolve_dt (code
->ext
.dt
, &code
->loc
))
11604 resolve_branch (code
->ext
.dt
->err
, code
);
11605 resolve_branch (code
->ext
.dt
->end
, code
);
11606 resolve_branch (code
->ext
.dt
->eor
, code
);
11609 case EXEC_TRANSFER
:
11610 resolve_transfer (code
);
11613 case EXEC_DO_CONCURRENT
:
11615 resolve_forall_iterators (code
->ext
.forall_iterator
);
11617 if (code
->expr1
!= NULL
11618 && (code
->expr1
->ts
.type
!= BT_LOGICAL
|| code
->expr1
->rank
))
11619 gfc_error ("FORALL mask clause at %L requires a scalar LOGICAL "
11620 "expression", &code
->expr1
->where
);
11623 case EXEC_OACC_PARALLEL_LOOP
:
11624 case EXEC_OACC_PARALLEL
:
11625 case EXEC_OACC_KERNELS_LOOP
:
11626 case EXEC_OACC_KERNELS
:
11627 case EXEC_OACC_DATA
:
11628 case EXEC_OACC_HOST_DATA
:
11629 case EXEC_OACC_LOOP
:
11630 case EXEC_OACC_UPDATE
:
11631 case EXEC_OACC_WAIT
:
11632 case EXEC_OACC_CACHE
:
11633 case EXEC_OACC_ENTER_DATA
:
11634 case EXEC_OACC_EXIT_DATA
:
11635 case EXEC_OACC_ATOMIC
:
11636 case EXEC_OACC_DECLARE
:
11637 gfc_resolve_oacc_directive (code
, ns
);
11640 case EXEC_OMP_ATOMIC
:
11641 case EXEC_OMP_BARRIER
:
11642 case EXEC_OMP_CANCEL
:
11643 case EXEC_OMP_CANCELLATION_POINT
:
11644 case EXEC_OMP_CRITICAL
:
11645 case EXEC_OMP_FLUSH
:
11646 case EXEC_OMP_DISTRIBUTE
:
11647 case EXEC_OMP_DISTRIBUTE_PARALLEL_DO
:
11648 case EXEC_OMP_DISTRIBUTE_PARALLEL_DO_SIMD
:
11649 case EXEC_OMP_DISTRIBUTE_SIMD
:
11651 case EXEC_OMP_DO_SIMD
:
11652 case EXEC_OMP_MASTER
:
11653 case EXEC_OMP_ORDERED
:
11654 case EXEC_OMP_SECTIONS
:
11655 case EXEC_OMP_SIMD
:
11656 case EXEC_OMP_SINGLE
:
11657 case EXEC_OMP_TARGET
:
11658 case EXEC_OMP_TARGET_DATA
:
11659 case EXEC_OMP_TARGET_ENTER_DATA
:
11660 case EXEC_OMP_TARGET_EXIT_DATA
:
11661 case EXEC_OMP_TARGET_PARALLEL
:
11662 case EXEC_OMP_TARGET_PARALLEL_DO
:
11663 case EXEC_OMP_TARGET_PARALLEL_DO_SIMD
:
11664 case EXEC_OMP_TARGET_SIMD
:
11665 case EXEC_OMP_TARGET_TEAMS
:
11666 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE
:
11667 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO
:
11668 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
11669 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_SIMD
:
11670 case EXEC_OMP_TARGET_UPDATE
:
11671 case EXEC_OMP_TASK
:
11672 case EXEC_OMP_TASKGROUP
:
11673 case EXEC_OMP_TASKLOOP
:
11674 case EXEC_OMP_TASKLOOP_SIMD
:
11675 case EXEC_OMP_TASKWAIT
:
11676 case EXEC_OMP_TASKYIELD
:
11677 case EXEC_OMP_TEAMS
:
11678 case EXEC_OMP_TEAMS_DISTRIBUTE
:
11679 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO
:
11680 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
11681 case EXEC_OMP_TEAMS_DISTRIBUTE_SIMD
:
11682 case EXEC_OMP_WORKSHARE
:
11683 gfc_resolve_omp_directive (code
, ns
);
11686 case EXEC_OMP_PARALLEL
:
11687 case EXEC_OMP_PARALLEL_DO
:
11688 case EXEC_OMP_PARALLEL_DO_SIMD
:
11689 case EXEC_OMP_PARALLEL_SECTIONS
:
11690 case EXEC_OMP_PARALLEL_WORKSHARE
:
11691 omp_workshare_save
= omp_workshare_flag
;
11692 omp_workshare_flag
= 0;
11693 gfc_resolve_omp_directive (code
, ns
);
11694 omp_workshare_flag
= omp_workshare_save
;
11698 gfc_internal_error ("gfc_resolve_code(): Bad statement code");
11702 cs_base
= frame
.prev
;
11706 /* Resolve initial values and make sure they are compatible with
11710 resolve_values (gfc_symbol
*sym
)
11714 if (sym
->value
== NULL
)
11717 if (sym
->value
->expr_type
== EXPR_STRUCTURE
)
11718 t
= resolve_structure_cons (sym
->value
, 1);
11720 t
= gfc_resolve_expr (sym
->value
);
11725 gfc_check_assign_symbol (sym
, NULL
, sym
->value
);
11729 /* Verify any BIND(C) derived types in the namespace so we can report errors
11730 for them once, rather than for each variable declared of that type. */
11733 resolve_bind_c_derived_types (gfc_symbol
*derived_sym
)
11735 if (derived_sym
!= NULL
&& derived_sym
->attr
.flavor
== FL_DERIVED
11736 && derived_sym
->attr
.is_bind_c
== 1)
11737 verify_bind_c_derived_type (derived_sym
);
11743 /* Check the interfaces of DTIO procedures associated with derived
11744 type 'sym'. These procedures can either have typebound bindings or
11745 can appear in DTIO generic interfaces. */
11748 gfc_verify_DTIO_procedures (gfc_symbol
*sym
)
11750 if (!sym
|| sym
->attr
.flavor
!= FL_DERIVED
)
11753 gfc_check_dtio_interfaces (sym
);
11758 /* Verify that any binding labels used in a given namespace do not collide
11759 with the names or binding labels of any global symbols. Multiple INTERFACE
11760 for the same procedure are permitted. */
11763 gfc_verify_binding_labels (gfc_symbol
*sym
)
11766 const char *module
;
11768 if (!sym
|| !sym
->attr
.is_bind_c
|| sym
->attr
.is_iso_c
11769 || sym
->attr
.flavor
== FL_DERIVED
|| !sym
->binding_label
)
11772 gsym
= gfc_find_case_gsymbol (gfc_gsym_root
, sym
->binding_label
);
11775 module
= sym
->module
;
11776 else if (sym
->ns
&& sym
->ns
->proc_name
11777 && sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
)
11778 module
= sym
->ns
->proc_name
->name
;
11779 else if (sym
->ns
&& sym
->ns
->parent
11780 && sym
->ns
&& sym
->ns
->parent
->proc_name
11781 && sym
->ns
->parent
->proc_name
->attr
.flavor
== FL_MODULE
)
11782 module
= sym
->ns
->parent
->proc_name
->name
;
11788 && (gsym
->type
== GSYM_FUNCTION
|| gsym
->type
== GSYM_SUBROUTINE
)))
11791 gsym
= gfc_get_gsymbol (sym
->binding_label
);
11792 gsym
->where
= sym
->declared_at
;
11793 gsym
->sym_name
= sym
->name
;
11794 gsym
->binding_label
= sym
->binding_label
;
11795 gsym
->ns
= sym
->ns
;
11796 gsym
->mod_name
= module
;
11797 if (sym
->attr
.function
)
11798 gsym
->type
= GSYM_FUNCTION
;
11799 else if (sym
->attr
.subroutine
)
11800 gsym
->type
= GSYM_SUBROUTINE
;
11801 /* Mark as variable/procedure as defined, unless its an INTERFACE. */
11802 gsym
->defined
= sym
->attr
.if_source
!= IFSRC_IFBODY
;
11806 if (sym
->attr
.flavor
== FL_VARIABLE
&& gsym
->type
!= GSYM_UNKNOWN
)
11808 gfc_error ("Variable %qs with binding label %qs at %L uses the same global "
11809 "identifier as entity at %L", sym
->name
,
11810 sym
->binding_label
, &sym
->declared_at
, &gsym
->where
);
11811 /* Clear the binding label to prevent checking multiple times. */
11812 sym
->binding_label
= NULL
;
11816 if (sym
->attr
.flavor
== FL_VARIABLE
&& module
11817 && (strcmp (module
, gsym
->mod_name
) != 0
11818 || strcmp (sym
->name
, gsym
->sym_name
) != 0))
11820 /* This can only happen if the variable is defined in a module - if it
11821 isn't the same module, reject it. */
11822 gfc_error ("Variable %qs from module %qs with binding label %qs at %L "
11823 "uses the same global identifier as entity at %L from module %qs",
11824 sym
->name
, module
, sym
->binding_label
,
11825 &sym
->declared_at
, &gsym
->where
, gsym
->mod_name
);
11826 sym
->binding_label
= NULL
;
11830 if ((sym
->attr
.function
|| sym
->attr
.subroutine
)
11831 && ((gsym
->type
!= GSYM_SUBROUTINE
&& gsym
->type
!= GSYM_FUNCTION
)
11832 || (gsym
->defined
&& sym
->attr
.if_source
!= IFSRC_IFBODY
))
11833 && (sym
!= gsym
->ns
->proc_name
&& sym
->attr
.entry
== 0)
11834 && (module
!= gsym
->mod_name
11835 || strcmp (gsym
->sym_name
, sym
->name
) != 0
11836 || (module
&& strcmp (module
, gsym
->mod_name
) != 0)))
11838 /* Print an error if the procedure is defined multiple times; we have to
11839 exclude references to the same procedure via module association or
11840 multiple checks for the same procedure. */
11841 gfc_error ("Procedure %qs with binding label %qs at %L uses the same "
11842 "global identifier as entity at %L", sym
->name
,
11843 sym
->binding_label
, &sym
->declared_at
, &gsym
->where
);
11844 sym
->binding_label
= NULL
;
11849 /* Resolve an index expression. */
11852 resolve_index_expr (gfc_expr
*e
)
11854 if (!gfc_resolve_expr (e
))
11857 if (!gfc_simplify_expr (e
, 0))
11860 if (!gfc_specification_expr (e
))
11867 /* Resolve a charlen structure. */
11870 resolve_charlen (gfc_charlen
*cl
)
11873 bool saved_specification_expr
;
11879 saved_specification_expr
= specification_expr
;
11880 specification_expr
= true;
11882 if (cl
->length_from_typespec
)
11884 if (!gfc_resolve_expr (cl
->length
))
11886 specification_expr
= saved_specification_expr
;
11890 if (!gfc_simplify_expr (cl
->length
, 0))
11892 specification_expr
= saved_specification_expr
;
11896 /* cl->length has been resolved. It should have an integer type. */
11897 if (cl
->length
->ts
.type
!= BT_INTEGER
)
11899 gfc_error ("Scalar INTEGER expression expected at %L",
11900 &cl
->length
->where
);
11906 if (!resolve_index_expr (cl
->length
))
11908 specification_expr
= saved_specification_expr
;
11913 /* F2008, 4.4.3.2: If the character length parameter value evaluates to
11914 a negative value, the length of character entities declared is zero. */
11915 if (cl
->length
&& cl
->length
->expr_type
== EXPR_CONSTANT
11916 && mpz_sgn (cl
->length
->value
.integer
) < 0)
11917 gfc_replace_expr (cl
->length
,
11918 gfc_get_int_expr (gfc_charlen_int_kind
, NULL
, 0));
11920 /* Check that the character length is not too large. */
11921 k
= gfc_validate_kind (BT_INTEGER
, gfc_charlen_int_kind
, false);
11922 if (cl
->length
&& cl
->length
->expr_type
== EXPR_CONSTANT
11923 && cl
->length
->ts
.type
== BT_INTEGER
11924 && mpz_cmp (cl
->length
->value
.integer
, gfc_integer_kinds
[k
].huge
) > 0)
11926 gfc_error ("String length at %L is too large", &cl
->length
->where
);
11927 specification_expr
= saved_specification_expr
;
11931 specification_expr
= saved_specification_expr
;
11936 /* Test for non-constant shape arrays. */
11939 is_non_constant_shape_array (gfc_symbol
*sym
)
11945 not_constant
= false;
11946 if (sym
->as
!= NULL
)
11948 /* Unfortunately, !gfc_is_compile_time_shape hits a legal case that
11949 has not been simplified; parameter array references. Do the
11950 simplification now. */
11951 for (i
= 0; i
< sym
->as
->rank
+ sym
->as
->corank
; i
++)
11953 e
= sym
->as
->lower
[i
];
11954 if (e
&& (!resolve_index_expr(e
)
11955 || !gfc_is_constant_expr (e
)))
11956 not_constant
= true;
11957 e
= sym
->as
->upper
[i
];
11958 if (e
&& (!resolve_index_expr(e
)
11959 || !gfc_is_constant_expr (e
)))
11960 not_constant
= true;
11963 return not_constant
;
11966 /* Given a symbol and an initialization expression, add code to initialize
11967 the symbol to the function entry. */
11969 build_init_assign (gfc_symbol
*sym
, gfc_expr
*init
)
11973 gfc_namespace
*ns
= sym
->ns
;
11975 /* Search for the function namespace if this is a contained
11976 function without an explicit result. */
11977 if (sym
->attr
.function
&& sym
== sym
->result
11978 && sym
->name
!= sym
->ns
->proc_name
->name
)
11980 ns
= ns
->contained
;
11981 for (;ns
; ns
= ns
->sibling
)
11982 if (strcmp (ns
->proc_name
->name
, sym
->name
) == 0)
11988 gfc_free_expr (init
);
11992 /* Build an l-value expression for the result. */
11993 lval
= gfc_lval_expr_from_sym (sym
);
11995 /* Add the code at scope entry. */
11996 init_st
= gfc_get_code (EXEC_INIT_ASSIGN
);
11997 init_st
->next
= ns
->code
;
11998 ns
->code
= init_st
;
12000 /* Assign the default initializer to the l-value. */
12001 init_st
->loc
= sym
->declared_at
;
12002 init_st
->expr1
= lval
;
12003 init_st
->expr2
= init
;
12007 /* Whether or not we can generate a default initializer for a symbol. */
12010 can_generate_init (gfc_symbol
*sym
)
12012 symbol_attribute
*a
;
12017 /* These symbols should never have a default initialization. */
12022 || (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
)
12023 && (CLASS_DATA (sym
)->attr
.class_pointer
12024 || CLASS_DATA (sym
)->attr
.proc_pointer
))
12025 || a
->in_equivalence
12032 || (!a
->referenced
&& !a
->result
)
12033 || (a
->dummy
&& a
->intent
!= INTENT_OUT
)
12034 || (a
->function
&& sym
!= sym
->result
)
12039 /* Assign the default initializer to a derived type variable or result. */
12042 apply_default_init (gfc_symbol
*sym
)
12044 gfc_expr
*init
= NULL
;
12046 if (sym
->attr
.flavor
!= FL_VARIABLE
&& !sym
->attr
.function
)
12049 if (sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
)
12050 init
= gfc_generate_initializer (&sym
->ts
, can_generate_init (sym
));
12052 if (init
== NULL
&& sym
->ts
.type
!= BT_CLASS
)
12055 build_init_assign (sym
, init
);
12056 sym
->attr
.referenced
= 1;
12060 /* Build an initializer for a local. Returns null if the symbol should not have
12061 a default initialization. */
12064 build_default_init_expr (gfc_symbol
*sym
)
12066 /* These symbols should never have a default initialization. */
12067 if (sym
->attr
.allocatable
12068 || sym
->attr
.external
12070 || sym
->attr
.pointer
12071 || sym
->attr
.in_equivalence
12072 || sym
->attr
.in_common
12075 || sym
->attr
.cray_pointee
12076 || sym
->attr
.cray_pointer
12080 /* Get the appropriate init expression. */
12081 return gfc_build_default_init_expr (&sym
->ts
, &sym
->declared_at
);
12084 /* Add an initialization expression to a local variable. */
12086 apply_default_init_local (gfc_symbol
*sym
)
12088 gfc_expr
*init
= NULL
;
12090 /* The symbol should be a variable or a function return value. */
12091 if ((sym
->attr
.flavor
!= FL_VARIABLE
&& !sym
->attr
.function
)
12092 || (sym
->attr
.function
&& sym
->result
!= sym
))
12095 /* Try to build the initializer expression. If we can't initialize
12096 this symbol, then init will be NULL. */
12097 init
= build_default_init_expr (sym
);
12101 /* For saved variables, we don't want to add an initializer at function
12102 entry, so we just add a static initializer. Note that automatic variables
12103 are stack allocated even with -fno-automatic; we have also to exclude
12104 result variable, which are also nonstatic. */
12105 if (!sym
->attr
.automatic
12106 && (sym
->attr
.save
|| sym
->ns
->save_all
12107 || (flag_max_stack_var_size
== 0 && !sym
->attr
.result
12108 && (sym
->ns
->proc_name
&& !sym
->ns
->proc_name
->attr
.recursive
)
12109 && (!sym
->attr
.dimension
|| !is_non_constant_shape_array (sym
)))))
12111 /* Don't clobber an existing initializer! */
12112 gcc_assert (sym
->value
== NULL
);
12117 build_init_assign (sym
, init
);
12121 /* Resolution of common features of flavors variable and procedure. */
12124 resolve_fl_var_and_proc (gfc_symbol
*sym
, int mp_flag
)
12126 gfc_array_spec
*as
;
12128 if (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
)
12129 as
= CLASS_DATA (sym
)->as
;
12133 /* Constraints on deferred shape variable. */
12134 if (as
== NULL
|| as
->type
!= AS_DEFERRED
)
12136 bool pointer
, allocatable
, dimension
;
12138 if (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
)
12140 pointer
= CLASS_DATA (sym
)->attr
.class_pointer
;
12141 allocatable
= CLASS_DATA (sym
)->attr
.allocatable
;
12142 dimension
= CLASS_DATA (sym
)->attr
.dimension
;
12146 pointer
= sym
->attr
.pointer
&& !sym
->attr
.select_type_temporary
;
12147 allocatable
= sym
->attr
.allocatable
;
12148 dimension
= sym
->attr
.dimension
;
12153 if (dimension
&& as
->type
!= AS_ASSUMED_RANK
)
12155 gfc_error ("Allocatable array %qs at %L must have a deferred "
12156 "shape or assumed rank", sym
->name
, &sym
->declared_at
);
12159 else if (!gfc_notify_std (GFC_STD_F2003
, "Scalar object "
12160 "%qs at %L may not be ALLOCATABLE",
12161 sym
->name
, &sym
->declared_at
))
12165 if (pointer
&& dimension
&& as
->type
!= AS_ASSUMED_RANK
)
12167 gfc_error ("Array pointer %qs at %L must have a deferred shape or "
12168 "assumed rank", sym
->name
, &sym
->declared_at
);
12174 if (!mp_flag
&& !sym
->attr
.allocatable
&& !sym
->attr
.pointer
12175 && sym
->ts
.type
!= BT_CLASS
&& !sym
->assoc
)
12177 gfc_error ("Array %qs at %L cannot have a deferred shape",
12178 sym
->name
, &sym
->declared_at
);
12183 /* Constraints on polymorphic variables. */
12184 if (sym
->ts
.type
== BT_CLASS
&& !(sym
->result
&& sym
->result
!= sym
))
12187 if (sym
->attr
.class_ok
12188 && !sym
->attr
.select_type_temporary
12189 && !UNLIMITED_POLY (sym
)
12190 && !gfc_type_is_extensible (CLASS_DATA (sym
)->ts
.u
.derived
))
12192 gfc_error ("Type %qs of CLASS variable %qs at %L is not extensible",
12193 CLASS_DATA (sym
)->ts
.u
.derived
->name
, sym
->name
,
12194 &sym
->declared_at
);
12199 /* Assume that use associated symbols were checked in the module ns.
12200 Class-variables that are associate-names are also something special
12201 and excepted from the test. */
12202 if (!sym
->attr
.class_ok
&& !sym
->attr
.use_assoc
&& !sym
->assoc
)
12204 gfc_error ("CLASS variable %qs at %L must be dummy, allocatable "
12205 "or pointer", sym
->name
, &sym
->declared_at
);
12214 /* Additional checks for symbols with flavor variable and derived
12215 type. To be called from resolve_fl_variable. */
12218 resolve_fl_variable_derived (gfc_symbol
*sym
, int no_init_flag
)
12220 gcc_assert (sym
->ts
.type
== BT_DERIVED
|| sym
->ts
.type
== BT_CLASS
);
12222 /* Check to see if a derived type is blocked from being host
12223 associated by the presence of another class I symbol in the same
12224 namespace. 14.6.1.3 of the standard and the discussion on
12225 comp.lang.fortran. */
12226 if (sym
->ns
!= sym
->ts
.u
.derived
->ns
12227 && !sym
->ts
.u
.derived
->attr
.use_assoc
12228 && sym
->ns
->proc_name
->attr
.if_source
!= IFSRC_IFBODY
)
12231 gfc_find_symbol (sym
->ts
.u
.derived
->name
, sym
->ns
, 0, &s
);
12232 if (s
&& s
->attr
.generic
)
12233 s
= gfc_find_dt_in_generic (s
);
12234 if (s
&& !gfc_fl_struct (s
->attr
.flavor
))
12236 gfc_error ("The type %qs cannot be host associated at %L "
12237 "because it is blocked by an incompatible object "
12238 "of the same name declared at %L",
12239 sym
->ts
.u
.derived
->name
, &sym
->declared_at
,
12245 /* 4th constraint in section 11.3: "If an object of a type for which
12246 component-initialization is specified (R429) appears in the
12247 specification-part of a module and does not have the ALLOCATABLE
12248 or POINTER attribute, the object shall have the SAVE attribute."
12250 The check for initializers is performed with
12251 gfc_has_default_initializer because gfc_default_initializer generates
12252 a hidden default for allocatable components. */
12253 if (!(sym
->value
|| no_init_flag
) && sym
->ns
->proc_name
12254 && sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
12255 && !(sym
->ns
->save_all
&& !sym
->attr
.automatic
) && !sym
->attr
.save
12256 && !sym
->attr
.pointer
&& !sym
->attr
.allocatable
12257 && gfc_has_default_initializer (sym
->ts
.u
.derived
)
12258 && !gfc_notify_std (GFC_STD_F2008
, "Implied SAVE for module variable "
12259 "%qs at %L, needed due to the default "
12260 "initialization", sym
->name
, &sym
->declared_at
))
12263 /* Assign default initializer. */
12264 if (!(sym
->value
|| sym
->attr
.pointer
|| sym
->attr
.allocatable
)
12265 && (!no_init_flag
|| sym
->attr
.intent
== INTENT_OUT
))
12266 sym
->value
= gfc_generate_initializer (&sym
->ts
, can_generate_init (sym
));
12272 /* F2008, C402 (R401): A colon shall not be used as a type-param-value
12273 except in the declaration of an entity or component that has the POINTER
12274 or ALLOCATABLE attribute. */
12277 deferred_requirements (gfc_symbol
*sym
)
12279 if (sym
->ts
.deferred
12280 && !(sym
->attr
.pointer
12281 || sym
->attr
.allocatable
12282 || sym
->attr
.associate_var
12283 || sym
->attr
.omp_udr_artificial_var
))
12285 gfc_error ("Entity %qs at %L has a deferred type parameter and "
12286 "requires either the POINTER or ALLOCATABLE attribute",
12287 sym
->name
, &sym
->declared_at
);
12294 /* Resolve symbols with flavor variable. */
12297 resolve_fl_variable (gfc_symbol
*sym
, int mp_flag
)
12299 const char *auto_save_msg
= "Automatic object %qs at %L cannot have the "
12302 if (!resolve_fl_var_and_proc (sym
, mp_flag
))
12305 /* Set this flag to check that variables are parameters of all entries.
12306 This check is effected by the call to gfc_resolve_expr through
12307 is_non_constant_shape_array. */
12308 bool saved_specification_expr
= specification_expr
;
12309 specification_expr
= true;
12311 if (sym
->ns
->proc_name
12312 && (sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
12313 || sym
->ns
->proc_name
->attr
.is_main_program
)
12314 && !sym
->attr
.use_assoc
12315 && !sym
->attr
.allocatable
12316 && !sym
->attr
.pointer
12317 && is_non_constant_shape_array (sym
))
12319 /* F08:C541. The shape of an array defined in a main program or module
12320 * needs to be constant. */
12321 gfc_error ("The module or main program array %qs at %L must "
12322 "have constant shape", sym
->name
, &sym
->declared_at
);
12323 specification_expr
= saved_specification_expr
;
12327 /* Constraints on deferred type parameter. */
12328 if (!deferred_requirements (sym
))
12331 if (sym
->ts
.type
== BT_CHARACTER
&& !sym
->attr
.associate_var
)
12333 /* Make sure that character string variables with assumed length are
12334 dummy arguments. */
12335 gfc_expr
*e
= NULL
;
12338 e
= sym
->ts
.u
.cl
->length
;
12342 if (e
== NULL
&& !sym
->attr
.dummy
&& !sym
->attr
.result
12343 && !sym
->ts
.deferred
&& !sym
->attr
.select_type_temporary
12344 && !sym
->attr
.omp_udr_artificial_var
)
12346 gfc_error ("Entity with assumed character length at %L must be a "
12347 "dummy argument or a PARAMETER", &sym
->declared_at
);
12348 specification_expr
= saved_specification_expr
;
12352 if (e
&& sym
->attr
.save
== SAVE_EXPLICIT
&& !gfc_is_constant_expr (e
))
12354 gfc_error (auto_save_msg
, sym
->name
, &sym
->declared_at
);
12355 specification_expr
= saved_specification_expr
;
12359 if (!gfc_is_constant_expr (e
)
12360 && !(e
->expr_type
== EXPR_VARIABLE
12361 && e
->symtree
->n
.sym
->attr
.flavor
== FL_PARAMETER
))
12363 if (!sym
->attr
.use_assoc
&& sym
->ns
->proc_name
12364 && (sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
12365 || sym
->ns
->proc_name
->attr
.is_main_program
))
12367 gfc_error ("%qs at %L must have constant character length "
12368 "in this context", sym
->name
, &sym
->declared_at
);
12369 specification_expr
= saved_specification_expr
;
12372 if (sym
->attr
.in_common
)
12374 gfc_error ("COMMON variable %qs at %L must have constant "
12375 "character length", sym
->name
, &sym
->declared_at
);
12376 specification_expr
= saved_specification_expr
;
12382 if (sym
->value
== NULL
&& sym
->attr
.referenced
)
12383 apply_default_init_local (sym
); /* Try to apply a default initialization. */
12385 /* Determine if the symbol may not have an initializer. */
12386 int no_init_flag
= 0, automatic_flag
= 0;
12387 if (sym
->attr
.allocatable
|| sym
->attr
.external
|| sym
->attr
.dummy
12388 || sym
->attr
.intrinsic
|| sym
->attr
.result
)
12390 else if ((sym
->attr
.dimension
|| sym
->attr
.codimension
) && !sym
->attr
.pointer
12391 && is_non_constant_shape_array (sym
))
12393 no_init_flag
= automatic_flag
= 1;
12395 /* Also, they must not have the SAVE attribute.
12396 SAVE_IMPLICIT is checked below. */
12397 if (sym
->as
&& sym
->attr
.codimension
)
12399 int corank
= sym
->as
->corank
;
12400 sym
->as
->corank
= 0;
12401 no_init_flag
= automatic_flag
= is_non_constant_shape_array (sym
);
12402 sym
->as
->corank
= corank
;
12404 if (automatic_flag
&& sym
->attr
.save
== SAVE_EXPLICIT
)
12406 gfc_error (auto_save_msg
, sym
->name
, &sym
->declared_at
);
12407 specification_expr
= saved_specification_expr
;
12412 /* Ensure that any initializer is simplified. */
12414 gfc_simplify_expr (sym
->value
, 1);
12416 /* Reject illegal initializers. */
12417 if (!sym
->mark
&& sym
->value
)
12419 if (sym
->attr
.allocatable
|| (sym
->ts
.type
== BT_CLASS
12420 && CLASS_DATA (sym
)->attr
.allocatable
))
12421 gfc_error ("Allocatable %qs at %L cannot have an initializer",
12422 sym
->name
, &sym
->declared_at
);
12423 else if (sym
->attr
.external
)
12424 gfc_error ("External %qs at %L cannot have an initializer",
12425 sym
->name
, &sym
->declared_at
);
12426 else if (sym
->attr
.dummy
12427 && !(sym
->ts
.type
== BT_DERIVED
&& sym
->attr
.intent
== INTENT_OUT
))
12428 gfc_error ("Dummy %qs at %L cannot have an initializer",
12429 sym
->name
, &sym
->declared_at
);
12430 else if (sym
->attr
.intrinsic
)
12431 gfc_error ("Intrinsic %qs at %L cannot have an initializer",
12432 sym
->name
, &sym
->declared_at
);
12433 else if (sym
->attr
.result
)
12434 gfc_error ("Function result %qs at %L cannot have an initializer",
12435 sym
->name
, &sym
->declared_at
);
12436 else if (automatic_flag
)
12437 gfc_error ("Automatic array %qs at %L cannot have an initializer",
12438 sym
->name
, &sym
->declared_at
);
12440 goto no_init_error
;
12441 specification_expr
= saved_specification_expr
;
12446 if (sym
->ts
.type
== BT_DERIVED
|| sym
->ts
.type
== BT_CLASS
)
12448 bool res
= resolve_fl_variable_derived (sym
, no_init_flag
);
12449 specification_expr
= saved_specification_expr
;
12453 specification_expr
= saved_specification_expr
;
12458 /* Compare the dummy characteristics of a module procedure interface
12459 declaration with the corresponding declaration in a submodule. */
12460 static gfc_formal_arglist
*new_formal
;
12461 static char errmsg
[200];
12464 compare_fsyms (gfc_symbol
*sym
)
12468 if (sym
== NULL
|| new_formal
== NULL
)
12471 fsym
= new_formal
->sym
;
12476 if (strcmp (sym
->name
, fsym
->name
) == 0)
12478 if (!gfc_check_dummy_characteristics (fsym
, sym
, true, errmsg
, 200))
12479 gfc_error ("%s at %L", errmsg
, &fsym
->declared_at
);
12484 /* Resolve a procedure. */
12487 resolve_fl_procedure (gfc_symbol
*sym
, int mp_flag
)
12489 gfc_formal_arglist
*arg
;
12491 if (sym
->attr
.function
12492 && !resolve_fl_var_and_proc (sym
, mp_flag
))
12495 if (sym
->ts
.type
== BT_CHARACTER
)
12497 gfc_charlen
*cl
= sym
->ts
.u
.cl
;
12499 if (cl
&& cl
->length
&& gfc_is_constant_expr (cl
->length
)
12500 && !resolve_charlen (cl
))
12503 if ((!cl
|| !cl
->length
|| cl
->length
->expr_type
!= EXPR_CONSTANT
)
12504 && sym
->attr
.proc
== PROC_ST_FUNCTION
)
12506 gfc_error ("Character-valued statement function %qs at %L must "
12507 "have constant length", sym
->name
, &sym
->declared_at
);
12512 /* Ensure that derived type for are not of a private type. Internal
12513 module procedures are excluded by 2.2.3.3 - i.e., they are not
12514 externally accessible and can access all the objects accessible in
12516 if (!(sym
->ns
->parent
&& sym
->ns
->parent
->proc_name
12517 && sym
->ns
->parent
->proc_name
->attr
.flavor
== FL_MODULE
)
12518 && gfc_check_symbol_access (sym
))
12520 gfc_interface
*iface
;
12522 for (arg
= gfc_sym_get_dummy_args (sym
); arg
; arg
= arg
->next
)
12525 && arg
->sym
->ts
.type
== BT_DERIVED
12526 && !arg
->sym
->ts
.u
.derived
->attr
.use_assoc
12527 && !gfc_check_symbol_access (arg
->sym
->ts
.u
.derived
)
12528 && !gfc_notify_std (GFC_STD_F2003
, "%qs is of a PRIVATE type "
12529 "and cannot be a dummy argument"
12530 " of %qs, which is PUBLIC at %L",
12531 arg
->sym
->name
, sym
->name
,
12532 &sym
->declared_at
))
12534 /* Stop this message from recurring. */
12535 arg
->sym
->ts
.u
.derived
->attr
.access
= ACCESS_PUBLIC
;
12540 /* PUBLIC interfaces may expose PRIVATE procedures that take types
12541 PRIVATE to the containing module. */
12542 for (iface
= sym
->generic
; iface
; iface
= iface
->next
)
12544 for (arg
= gfc_sym_get_dummy_args (iface
->sym
); arg
; arg
= arg
->next
)
12547 && arg
->sym
->ts
.type
== BT_DERIVED
12548 && !arg
->sym
->ts
.u
.derived
->attr
.use_assoc
12549 && !gfc_check_symbol_access (arg
->sym
->ts
.u
.derived
)
12550 && !gfc_notify_std (GFC_STD_F2003
, "Procedure %qs in "
12551 "PUBLIC interface %qs at %L "
12552 "takes dummy arguments of %qs which "
12553 "is PRIVATE", iface
->sym
->name
,
12554 sym
->name
, &iface
->sym
->declared_at
,
12555 gfc_typename(&arg
->sym
->ts
)))
12557 /* Stop this message from recurring. */
12558 arg
->sym
->ts
.u
.derived
->attr
.access
= ACCESS_PUBLIC
;
12565 if (sym
->attr
.function
&& sym
->value
&& sym
->attr
.proc
!= PROC_ST_FUNCTION
12566 && !sym
->attr
.proc_pointer
)
12568 gfc_error ("Function %qs at %L cannot have an initializer",
12569 sym
->name
, &sym
->declared_at
);
12571 /* Make sure no second error is issued for this. */
12572 sym
->value
->error
= 1;
12576 /* An external symbol may not have an initializer because it is taken to be
12577 a procedure. Exception: Procedure Pointers. */
12578 if (sym
->attr
.external
&& sym
->value
&& !sym
->attr
.proc_pointer
)
12580 gfc_error ("External object %qs at %L may not have an initializer",
12581 sym
->name
, &sym
->declared_at
);
12585 /* An elemental function is required to return a scalar 12.7.1 */
12586 if (sym
->attr
.elemental
&& sym
->attr
.function
12587 && (sym
->as
|| (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
)->as
)))
12589 gfc_error ("ELEMENTAL function %qs at %L must have a scalar "
12590 "result", sym
->name
, &sym
->declared_at
);
12591 /* Reset so that the error only occurs once. */
12592 sym
->attr
.elemental
= 0;
12596 if (sym
->attr
.proc
== PROC_ST_FUNCTION
12597 && (sym
->attr
.allocatable
|| sym
->attr
.pointer
))
12599 gfc_error ("Statement function %qs at %L may not have pointer or "
12600 "allocatable attribute", sym
->name
, &sym
->declared_at
);
12604 /* 5.1.1.5 of the Standard: A function name declared with an asterisk
12605 char-len-param shall not be array-valued, pointer-valued, recursive
12606 or pure. ....snip... A character value of * may only be used in the
12607 following ways: (i) Dummy arg of procedure - dummy associates with
12608 actual length; (ii) To declare a named constant; or (iii) External
12609 function - but length must be declared in calling scoping unit. */
12610 if (sym
->attr
.function
12611 && sym
->ts
.type
== BT_CHARACTER
&& !sym
->ts
.deferred
12612 && sym
->ts
.u
.cl
&& sym
->ts
.u
.cl
->length
== NULL
)
12614 if ((sym
->as
&& sym
->as
->rank
) || (sym
->attr
.pointer
)
12615 || (sym
->attr
.recursive
) || (sym
->attr
.pure
))
12617 if (sym
->as
&& sym
->as
->rank
)
12618 gfc_error ("CHARACTER(*) function %qs at %L cannot be "
12619 "array-valued", sym
->name
, &sym
->declared_at
);
12621 if (sym
->attr
.pointer
)
12622 gfc_error ("CHARACTER(*) function %qs at %L cannot be "
12623 "pointer-valued", sym
->name
, &sym
->declared_at
);
12625 if (sym
->attr
.pure
)
12626 gfc_error ("CHARACTER(*) function %qs at %L cannot be "
12627 "pure", sym
->name
, &sym
->declared_at
);
12629 if (sym
->attr
.recursive
)
12630 gfc_error ("CHARACTER(*) function %qs at %L cannot be "
12631 "recursive", sym
->name
, &sym
->declared_at
);
12636 /* Appendix B.2 of the standard. Contained functions give an
12637 error anyway. Deferred character length is an F2003 feature.
12638 Don't warn on intrinsic conversion functions, which start
12639 with two underscores. */
12640 if (!sym
->attr
.contained
&& !sym
->ts
.deferred
12641 && (sym
->name
[0] != '_' || sym
->name
[1] != '_'))
12642 gfc_notify_std (GFC_STD_F95_OBS
,
12643 "CHARACTER(*) function %qs at %L",
12644 sym
->name
, &sym
->declared_at
);
12647 /* F2008, C1218. */
12648 if (sym
->attr
.elemental
)
12650 if (sym
->attr
.proc_pointer
)
12652 gfc_error ("Procedure pointer %qs at %L shall not be elemental",
12653 sym
->name
, &sym
->declared_at
);
12656 if (sym
->attr
.dummy
)
12658 gfc_error ("Dummy procedure %qs at %L shall not be elemental",
12659 sym
->name
, &sym
->declared_at
);
12664 /* F2018, C15100: "The result of an elemental function shall be scalar,
12665 and shall not have the POINTER or ALLOCATABLE attribute." The scalar
12666 pointer is tested and caught elsewhere. */
12667 if (sym
->attr
.elemental
&& sym
->result
12668 && (sym
->result
->attr
.allocatable
|| sym
->result
->attr
.pointer
))
12670 gfc_error ("Function result variable %qs at %L of elemental "
12671 "function %qs shall not have an ALLOCATABLE or POINTER "
12672 "attribute", sym
->result
->name
,
12673 &sym
->result
->declared_at
, sym
->name
);
12677 if (sym
->attr
.is_bind_c
&& sym
->attr
.is_c_interop
!= 1)
12679 gfc_formal_arglist
*curr_arg
;
12680 int has_non_interop_arg
= 0;
12682 if (!verify_bind_c_sym (sym
, &(sym
->ts
), sym
->attr
.in_common
,
12683 sym
->common_block
))
12685 /* Clear these to prevent looking at them again if there was an
12687 sym
->attr
.is_bind_c
= 0;
12688 sym
->attr
.is_c_interop
= 0;
12689 sym
->ts
.is_c_interop
= 0;
12693 /* So far, no errors have been found. */
12694 sym
->attr
.is_c_interop
= 1;
12695 sym
->ts
.is_c_interop
= 1;
12698 curr_arg
= gfc_sym_get_dummy_args (sym
);
12699 while (curr_arg
!= NULL
)
12701 /* Skip implicitly typed dummy args here. */
12702 if (curr_arg
->sym
&& curr_arg
->sym
->attr
.implicit_type
== 0)
12703 if (!gfc_verify_c_interop_param (curr_arg
->sym
))
12704 /* If something is found to fail, record the fact so we
12705 can mark the symbol for the procedure as not being
12706 BIND(C) to try and prevent multiple errors being
12708 has_non_interop_arg
= 1;
12710 curr_arg
= curr_arg
->next
;
12713 /* See if any of the arguments were not interoperable and if so, clear
12714 the procedure symbol to prevent duplicate error messages. */
12715 if (has_non_interop_arg
!= 0)
12717 sym
->attr
.is_c_interop
= 0;
12718 sym
->ts
.is_c_interop
= 0;
12719 sym
->attr
.is_bind_c
= 0;
12723 if (!sym
->attr
.proc_pointer
)
12725 if (sym
->attr
.save
== SAVE_EXPLICIT
)
12727 gfc_error ("PROCEDURE attribute conflicts with SAVE attribute "
12728 "in %qs at %L", sym
->name
, &sym
->declared_at
);
12731 if (sym
->attr
.intent
)
12733 gfc_error ("PROCEDURE attribute conflicts with INTENT attribute "
12734 "in %qs at %L", sym
->name
, &sym
->declared_at
);
12737 if (sym
->attr
.subroutine
&& sym
->attr
.result
)
12739 gfc_error ("PROCEDURE attribute conflicts with RESULT attribute "
12740 "in %qs at %L", sym
->name
, &sym
->declared_at
);
12743 if (sym
->attr
.external
&& sym
->attr
.function
&& !sym
->attr
.module_procedure
12744 && ((sym
->attr
.if_source
== IFSRC_DECL
&& !sym
->attr
.procedure
)
12745 || sym
->attr
.contained
))
12747 gfc_error ("EXTERNAL attribute conflicts with FUNCTION attribute "
12748 "in %qs at %L", sym
->name
, &sym
->declared_at
);
12751 if (strcmp ("ppr@", sym
->name
) == 0)
12753 gfc_error ("Procedure pointer result %qs at %L "
12754 "is missing the pointer attribute",
12755 sym
->ns
->proc_name
->name
, &sym
->declared_at
);
12760 /* Assume that a procedure whose body is not known has references
12761 to external arrays. */
12762 if (sym
->attr
.if_source
!= IFSRC_DECL
)
12763 sym
->attr
.array_outer_dependency
= 1;
12765 /* Compare the characteristics of a module procedure with the
12766 interface declaration. Ideally this would be done with
12767 gfc_compare_interfaces but, at present, the formal interface
12768 cannot be copied to the ts.interface. */
12769 if (sym
->attr
.module_procedure
12770 && sym
->attr
.if_source
== IFSRC_DECL
)
12773 char name
[2*GFC_MAX_SYMBOL_LEN
+ 1];
12775 char *submodule_name
;
12776 strcpy (name
, sym
->ns
->proc_name
->name
);
12777 module_name
= strtok (name
, ".");
12778 submodule_name
= strtok (NULL
, ".");
12780 iface
= sym
->tlink
;
12783 /* Make sure that the result uses the correct charlen for deferred
12785 if (iface
&& sym
->result
12786 && iface
->ts
.type
== BT_CHARACTER
12787 && iface
->ts
.deferred
)
12788 sym
->result
->ts
.u
.cl
= iface
->ts
.u
.cl
;
12793 /* Check the procedure characteristics. */
12794 if (sym
->attr
.elemental
!= iface
->attr
.elemental
)
12796 gfc_error ("Mismatch in ELEMENTAL attribute between MODULE "
12797 "PROCEDURE at %L and its interface in %s",
12798 &sym
->declared_at
, module_name
);
12802 if (sym
->attr
.pure
!= iface
->attr
.pure
)
12804 gfc_error ("Mismatch in PURE attribute between MODULE "
12805 "PROCEDURE at %L and its interface in %s",
12806 &sym
->declared_at
, module_name
);
12810 if (sym
->attr
.recursive
!= iface
->attr
.recursive
)
12812 gfc_error ("Mismatch in RECURSIVE attribute between MODULE "
12813 "PROCEDURE at %L and its interface in %s",
12814 &sym
->declared_at
, module_name
);
12818 /* Check the result characteristics. */
12819 if (!gfc_check_result_characteristics (sym
, iface
, errmsg
, 200))
12821 gfc_error ("%s between the MODULE PROCEDURE declaration "
12822 "in MODULE %qs and the declaration at %L in "
12824 errmsg
, module_name
, &sym
->declared_at
,
12825 submodule_name
? submodule_name
: module_name
);
12830 /* Check the characteristics of the formal arguments. */
12831 if (sym
->formal
&& sym
->formal_ns
)
12833 for (arg
= sym
->formal
; arg
&& arg
->sym
; arg
= arg
->next
)
12836 gfc_traverse_ns (sym
->formal_ns
, compare_fsyms
);
12844 /* Resolve a list of finalizer procedures. That is, after they have hopefully
12845 been defined and we now know their defined arguments, check that they fulfill
12846 the requirements of the standard for procedures used as finalizers. */
12849 gfc_resolve_finalizers (gfc_symbol
* derived
, bool *finalizable
)
12851 gfc_finalizer
* list
;
12852 gfc_finalizer
** prev_link
; /* For removing wrong entries from the list. */
12853 bool result
= true;
12854 bool seen_scalar
= false;
12857 gfc_symbol
*parent
= gfc_get_derived_super_type (derived
);
12860 gfc_resolve_finalizers (parent
, finalizable
);
12862 /* Ensure that derived-type components have a their finalizers resolved. */
12863 bool has_final
= derived
->f2k_derived
&& derived
->f2k_derived
->finalizers
;
12864 for (c
= derived
->components
; c
; c
= c
->next
)
12865 if (c
->ts
.type
== BT_DERIVED
12866 && !c
->attr
.pointer
&& !c
->attr
.proc_pointer
&& !c
->attr
.allocatable
)
12868 bool has_final2
= false;
12869 if (!gfc_resolve_finalizers (c
->ts
.u
.derived
, &has_final2
))
12870 return false; /* Error. */
12871 has_final
= has_final
|| has_final2
;
12873 /* Return early if not finalizable. */
12877 *finalizable
= false;
12881 /* Walk over the list of finalizer-procedures, check them, and if any one
12882 does not fit in with the standard's definition, print an error and remove
12883 it from the list. */
12884 prev_link
= &derived
->f2k_derived
->finalizers
;
12885 for (list
= derived
->f2k_derived
->finalizers
; list
; list
= *prev_link
)
12887 gfc_formal_arglist
*dummy_args
;
12892 /* Skip this finalizer if we already resolved it. */
12893 if (list
->proc_tree
)
12895 if (list
->proc_tree
->n
.sym
->formal
->sym
->as
== NULL
12896 || list
->proc_tree
->n
.sym
->formal
->sym
->as
->rank
== 0)
12897 seen_scalar
= true;
12898 prev_link
= &(list
->next
);
12902 /* Check this exists and is a SUBROUTINE. */
12903 if (!list
->proc_sym
->attr
.subroutine
)
12905 gfc_error ("FINAL procedure %qs at %L is not a SUBROUTINE",
12906 list
->proc_sym
->name
, &list
->where
);
12910 /* We should have exactly one argument. */
12911 dummy_args
= gfc_sym_get_dummy_args (list
->proc_sym
);
12912 if (!dummy_args
|| dummy_args
->next
)
12914 gfc_error ("FINAL procedure at %L must have exactly one argument",
12918 arg
= dummy_args
->sym
;
12920 /* This argument must be of our type. */
12921 if (arg
->ts
.type
!= BT_DERIVED
|| arg
->ts
.u
.derived
!= derived
)
12923 gfc_error ("Argument of FINAL procedure at %L must be of type %qs",
12924 &arg
->declared_at
, derived
->name
);
12928 /* It must neither be a pointer nor allocatable nor optional. */
12929 if (arg
->attr
.pointer
)
12931 gfc_error ("Argument of FINAL procedure at %L must not be a POINTER",
12932 &arg
->declared_at
);
12935 if (arg
->attr
.allocatable
)
12937 gfc_error ("Argument of FINAL procedure at %L must not be"
12938 " ALLOCATABLE", &arg
->declared_at
);
12941 if (arg
->attr
.optional
)
12943 gfc_error ("Argument of FINAL procedure at %L must not be OPTIONAL",
12944 &arg
->declared_at
);
12948 /* It must not be INTENT(OUT). */
12949 if (arg
->attr
.intent
== INTENT_OUT
)
12951 gfc_error ("Argument of FINAL procedure at %L must not be"
12952 " INTENT(OUT)", &arg
->declared_at
);
12956 /* Warn if the procedure is non-scalar and not assumed shape. */
12957 if (warn_surprising
&& arg
->as
&& arg
->as
->rank
!= 0
12958 && arg
->as
->type
!= AS_ASSUMED_SHAPE
)
12959 gfc_warning (OPT_Wsurprising
,
12960 "Non-scalar FINAL procedure at %L should have assumed"
12961 " shape argument", &arg
->declared_at
);
12963 /* Check that it does not match in kind and rank with a FINAL procedure
12964 defined earlier. To really loop over the *earlier* declarations,
12965 we need to walk the tail of the list as new ones were pushed at the
12967 /* TODO: Handle kind parameters once they are implemented. */
12968 my_rank
= (arg
->as
? arg
->as
->rank
: 0);
12969 for (i
= list
->next
; i
; i
= i
->next
)
12971 gfc_formal_arglist
*dummy_args
;
12973 /* Argument list might be empty; that is an error signalled earlier,
12974 but we nevertheless continued resolving. */
12975 dummy_args
= gfc_sym_get_dummy_args (i
->proc_sym
);
12978 gfc_symbol
* i_arg
= dummy_args
->sym
;
12979 const int i_rank
= (i_arg
->as
? i_arg
->as
->rank
: 0);
12980 if (i_rank
== my_rank
)
12982 gfc_error ("FINAL procedure %qs declared at %L has the same"
12983 " rank (%d) as %qs",
12984 list
->proc_sym
->name
, &list
->where
, my_rank
,
12985 i
->proc_sym
->name
);
12991 /* Is this the/a scalar finalizer procedure? */
12993 seen_scalar
= true;
12995 /* Find the symtree for this procedure. */
12996 gcc_assert (!list
->proc_tree
);
12997 list
->proc_tree
= gfc_find_sym_in_symtree (list
->proc_sym
);
12999 prev_link
= &list
->next
;
13002 /* Remove wrong nodes immediately from the list so we don't risk any
13003 troubles in the future when they might fail later expectations. */
13006 *prev_link
= list
->next
;
13007 gfc_free_finalizer (i
);
13011 if (result
== false)
13014 /* Warn if we haven't seen a scalar finalizer procedure (but we know there
13015 were nodes in the list, must have been for arrays. It is surely a good
13016 idea to have a scalar version there if there's something to finalize. */
13017 if (warn_surprising
&& derived
->f2k_derived
->finalizers
&& !seen_scalar
)
13018 gfc_warning (OPT_Wsurprising
,
13019 "Only array FINAL procedures declared for derived type %qs"
13020 " defined at %L, suggest also scalar one",
13021 derived
->name
, &derived
->declared_at
);
13023 vtab
= gfc_find_derived_vtab (derived
);
13024 c
= vtab
->ts
.u
.derived
->components
->next
->next
->next
->next
->next
;
13025 gfc_set_sym_referenced (c
->initializer
->symtree
->n
.sym
);
13028 *finalizable
= true;
13034 /* Check if two GENERIC targets are ambiguous and emit an error is they are. */
13037 check_generic_tbp_ambiguity (gfc_tbp_generic
* t1
, gfc_tbp_generic
* t2
,
13038 const char* generic_name
, locus where
)
13040 gfc_symbol
*sym1
, *sym2
;
13041 const char *pass1
, *pass2
;
13042 gfc_formal_arglist
*dummy_args
;
13044 gcc_assert (t1
->specific
&& t2
->specific
);
13045 gcc_assert (!t1
->specific
->is_generic
);
13046 gcc_assert (!t2
->specific
->is_generic
);
13047 gcc_assert (t1
->is_operator
== t2
->is_operator
);
13049 sym1
= t1
->specific
->u
.specific
->n
.sym
;
13050 sym2
= t2
->specific
->u
.specific
->n
.sym
;
13055 /* Both must be SUBROUTINEs or both must be FUNCTIONs. */
13056 if (sym1
->attr
.subroutine
!= sym2
->attr
.subroutine
13057 || sym1
->attr
.function
!= sym2
->attr
.function
)
13059 gfc_error ("%qs and %qs can't be mixed FUNCTION/SUBROUTINE for"
13060 " GENERIC %qs at %L",
13061 sym1
->name
, sym2
->name
, generic_name
, &where
);
13065 /* Determine PASS arguments. */
13066 if (t1
->specific
->nopass
)
13068 else if (t1
->specific
->pass_arg
)
13069 pass1
= t1
->specific
->pass_arg
;
13072 dummy_args
= gfc_sym_get_dummy_args (t1
->specific
->u
.specific
->n
.sym
);
13074 pass1
= dummy_args
->sym
->name
;
13078 if (t2
->specific
->nopass
)
13080 else if (t2
->specific
->pass_arg
)
13081 pass2
= t2
->specific
->pass_arg
;
13084 dummy_args
= gfc_sym_get_dummy_args (t2
->specific
->u
.specific
->n
.sym
);
13086 pass2
= dummy_args
->sym
->name
;
13091 /* Compare the interfaces. */
13092 if (gfc_compare_interfaces (sym1
, sym2
, sym2
->name
, !t1
->is_operator
, 0,
13093 NULL
, 0, pass1
, pass2
))
13095 gfc_error ("%qs and %qs for GENERIC %qs at %L are ambiguous",
13096 sym1
->name
, sym2
->name
, generic_name
, &where
);
13104 /* Worker function for resolving a generic procedure binding; this is used to
13105 resolve GENERIC as well as user and intrinsic OPERATOR typebound procedures.
13107 The difference between those cases is finding possible inherited bindings
13108 that are overridden, as one has to look for them in tb_sym_root,
13109 tb_uop_root or tb_op, respectively. Thus the caller must already find
13110 the super-type and set p->overridden correctly. */
13113 resolve_tb_generic_targets (gfc_symbol
* super_type
,
13114 gfc_typebound_proc
* p
, const char* name
)
13116 gfc_tbp_generic
* target
;
13117 gfc_symtree
* first_target
;
13118 gfc_symtree
* inherited
;
13120 gcc_assert (p
&& p
->is_generic
);
13122 /* Try to find the specific bindings for the symtrees in our target-list. */
13123 gcc_assert (p
->u
.generic
);
13124 for (target
= p
->u
.generic
; target
; target
= target
->next
)
13125 if (!target
->specific
)
13127 gfc_typebound_proc
* overridden_tbp
;
13128 gfc_tbp_generic
* g
;
13129 const char* target_name
;
13131 target_name
= target
->specific_st
->name
;
13133 /* Defined for this type directly. */
13134 if (target
->specific_st
->n
.tb
&& !target
->specific_st
->n
.tb
->error
)
13136 target
->specific
= target
->specific_st
->n
.tb
;
13137 goto specific_found
;
13140 /* Look for an inherited specific binding. */
13143 inherited
= gfc_find_typebound_proc (super_type
, NULL
, target_name
,
13148 gcc_assert (inherited
->n
.tb
);
13149 target
->specific
= inherited
->n
.tb
;
13150 goto specific_found
;
13154 gfc_error ("Undefined specific binding %qs as target of GENERIC %qs"
13155 " at %L", target_name
, name
, &p
->where
);
13158 /* Once we've found the specific binding, check it is not ambiguous with
13159 other specifics already found or inherited for the same GENERIC. */
13161 gcc_assert (target
->specific
);
13163 /* This must really be a specific binding! */
13164 if (target
->specific
->is_generic
)
13166 gfc_error ("GENERIC %qs at %L must target a specific binding,"
13167 " %qs is GENERIC, too", name
, &p
->where
, target_name
);
13171 /* Check those already resolved on this type directly. */
13172 for (g
= p
->u
.generic
; g
; g
= g
->next
)
13173 if (g
!= target
&& g
->specific
13174 && !check_generic_tbp_ambiguity (target
, g
, name
, p
->where
))
13177 /* Check for ambiguity with inherited specific targets. */
13178 for (overridden_tbp
= p
->overridden
; overridden_tbp
;
13179 overridden_tbp
= overridden_tbp
->overridden
)
13180 if (overridden_tbp
->is_generic
)
13182 for (g
= overridden_tbp
->u
.generic
; g
; g
= g
->next
)
13184 gcc_assert (g
->specific
);
13185 if (!check_generic_tbp_ambiguity (target
, g
, name
, p
->where
))
13191 /* If we attempt to "overwrite" a specific binding, this is an error. */
13192 if (p
->overridden
&& !p
->overridden
->is_generic
)
13194 gfc_error ("GENERIC %qs at %L can't overwrite specific binding with"
13195 " the same name", name
, &p
->where
);
13199 /* Take the SUBROUTINE/FUNCTION attributes of the first specific target, as
13200 all must have the same attributes here. */
13201 first_target
= p
->u
.generic
->specific
->u
.specific
;
13202 gcc_assert (first_target
);
13203 p
->subroutine
= first_target
->n
.sym
->attr
.subroutine
;
13204 p
->function
= first_target
->n
.sym
->attr
.function
;
13210 /* Resolve a GENERIC procedure binding for a derived type. */
13213 resolve_typebound_generic (gfc_symbol
* derived
, gfc_symtree
* st
)
13215 gfc_symbol
* super_type
;
13217 /* Find the overridden binding if any. */
13218 st
->n
.tb
->overridden
= NULL
;
13219 super_type
= gfc_get_derived_super_type (derived
);
13222 gfc_symtree
* overridden
;
13223 overridden
= gfc_find_typebound_proc (super_type
, NULL
, st
->name
,
13226 if (overridden
&& overridden
->n
.tb
)
13227 st
->n
.tb
->overridden
= overridden
->n
.tb
;
13230 /* Resolve using worker function. */
13231 return resolve_tb_generic_targets (super_type
, st
->n
.tb
, st
->name
);
13235 /* Retrieve the target-procedure of an operator binding and do some checks in
13236 common for intrinsic and user-defined type-bound operators. */
13239 get_checked_tb_operator_target (gfc_tbp_generic
* target
, locus where
)
13241 gfc_symbol
* target_proc
;
13243 gcc_assert (target
->specific
&& !target
->specific
->is_generic
);
13244 target_proc
= target
->specific
->u
.specific
->n
.sym
;
13245 gcc_assert (target_proc
);
13247 /* F08:C468. All operator bindings must have a passed-object dummy argument. */
13248 if (target
->specific
->nopass
)
13250 gfc_error ("Type-bound operator at %L can't be NOPASS", &where
);
13254 return target_proc
;
13258 /* Resolve a type-bound intrinsic operator. */
13261 resolve_typebound_intrinsic_op (gfc_symbol
* derived
, gfc_intrinsic_op op
,
13262 gfc_typebound_proc
* p
)
13264 gfc_symbol
* super_type
;
13265 gfc_tbp_generic
* target
;
13267 /* If there's already an error here, do nothing (but don't fail again). */
13271 /* Operators should always be GENERIC bindings. */
13272 gcc_assert (p
->is_generic
);
13274 /* Look for an overridden binding. */
13275 super_type
= gfc_get_derived_super_type (derived
);
13276 if (super_type
&& super_type
->f2k_derived
)
13277 p
->overridden
= gfc_find_typebound_intrinsic_op (super_type
, NULL
,
13280 p
->overridden
= NULL
;
13282 /* Resolve general GENERIC properties using worker function. */
13283 if (!resolve_tb_generic_targets (super_type
, p
, gfc_op2string(op
)))
13286 /* Check the targets to be procedures of correct interface. */
13287 for (target
= p
->u
.generic
; target
; target
= target
->next
)
13289 gfc_symbol
* target_proc
;
13291 target_proc
= get_checked_tb_operator_target (target
, p
->where
);
13295 if (!gfc_check_operator_interface (target_proc
, op
, p
->where
))
13298 /* Add target to non-typebound operator list. */
13299 if (!target
->specific
->deferred
&& !derived
->attr
.use_assoc
13300 && p
->access
!= ACCESS_PRIVATE
&& derived
->ns
== gfc_current_ns
)
13302 gfc_interface
*head
, *intr
;
13304 /* Preempt 'gfc_check_new_interface' for submodules, where the
13305 mechanism for handling module procedures winds up resolving
13306 operator interfaces twice and would otherwise cause an error. */
13307 for (intr
= derived
->ns
->op
[op
]; intr
; intr
= intr
->next
)
13308 if (intr
->sym
== target_proc
13309 && target_proc
->attr
.used_in_submodule
)
13312 if (!gfc_check_new_interface (derived
->ns
->op
[op
],
13313 target_proc
, p
->where
))
13315 head
= derived
->ns
->op
[op
];
13316 intr
= gfc_get_interface ();
13317 intr
->sym
= target_proc
;
13318 intr
->where
= p
->where
;
13320 derived
->ns
->op
[op
] = intr
;
13332 /* Resolve a type-bound user operator (tree-walker callback). */
13334 static gfc_symbol
* resolve_bindings_derived
;
13335 static bool resolve_bindings_result
;
13337 static bool check_uop_procedure (gfc_symbol
* sym
, locus where
);
13340 resolve_typebound_user_op (gfc_symtree
* stree
)
13342 gfc_symbol
* super_type
;
13343 gfc_tbp_generic
* target
;
13345 gcc_assert (stree
&& stree
->n
.tb
);
13347 if (stree
->n
.tb
->error
)
13350 /* Operators should always be GENERIC bindings. */
13351 gcc_assert (stree
->n
.tb
->is_generic
);
13353 /* Find overridden procedure, if any. */
13354 super_type
= gfc_get_derived_super_type (resolve_bindings_derived
);
13355 if (super_type
&& super_type
->f2k_derived
)
13357 gfc_symtree
* overridden
;
13358 overridden
= gfc_find_typebound_user_op (super_type
, NULL
,
13359 stree
->name
, true, NULL
);
13361 if (overridden
&& overridden
->n
.tb
)
13362 stree
->n
.tb
->overridden
= overridden
->n
.tb
;
13365 stree
->n
.tb
->overridden
= NULL
;
13367 /* Resolve basically using worker function. */
13368 if (!resolve_tb_generic_targets (super_type
, stree
->n
.tb
, stree
->name
))
13371 /* Check the targets to be functions of correct interface. */
13372 for (target
= stree
->n
.tb
->u
.generic
; target
; target
= target
->next
)
13374 gfc_symbol
* target_proc
;
13376 target_proc
= get_checked_tb_operator_target (target
, stree
->n
.tb
->where
);
13380 if (!check_uop_procedure (target_proc
, stree
->n
.tb
->where
))
13387 resolve_bindings_result
= false;
13388 stree
->n
.tb
->error
= 1;
13392 /* Resolve the type-bound procedures for a derived type. */
13395 resolve_typebound_procedure (gfc_symtree
* stree
)
13399 gfc_symbol
* me_arg
;
13400 gfc_symbol
* super_type
;
13401 gfc_component
* comp
;
13403 gcc_assert (stree
);
13405 /* Undefined specific symbol from GENERIC target definition. */
13409 if (stree
->n
.tb
->error
)
13412 /* If this is a GENERIC binding, use that routine. */
13413 if (stree
->n
.tb
->is_generic
)
13415 if (!resolve_typebound_generic (resolve_bindings_derived
, stree
))
13420 /* Get the target-procedure to check it. */
13421 gcc_assert (!stree
->n
.tb
->is_generic
);
13422 gcc_assert (stree
->n
.tb
->u
.specific
);
13423 proc
= stree
->n
.tb
->u
.specific
->n
.sym
;
13424 where
= stree
->n
.tb
->where
;
13426 /* Default access should already be resolved from the parser. */
13427 gcc_assert (stree
->n
.tb
->access
!= ACCESS_UNKNOWN
);
13429 if (stree
->n
.tb
->deferred
)
13431 if (!check_proc_interface (proc
, &where
))
13436 /* Check for F08:C465. */
13437 if ((!proc
->attr
.subroutine
&& !proc
->attr
.function
)
13438 || (proc
->attr
.proc
!= PROC_MODULE
13439 && proc
->attr
.if_source
!= IFSRC_IFBODY
)
13440 || proc
->attr
.abstract
)
13442 gfc_error ("%qs must be a module procedure or an external procedure with"
13443 " an explicit interface at %L", proc
->name
, &where
);
13448 stree
->n
.tb
->subroutine
= proc
->attr
.subroutine
;
13449 stree
->n
.tb
->function
= proc
->attr
.function
;
13451 /* Find the super-type of the current derived type. We could do this once and
13452 store in a global if speed is needed, but as long as not I believe this is
13453 more readable and clearer. */
13454 super_type
= gfc_get_derived_super_type (resolve_bindings_derived
);
13456 /* If PASS, resolve and check arguments if not already resolved / loaded
13457 from a .mod file. */
13458 if (!stree
->n
.tb
->nopass
&& stree
->n
.tb
->pass_arg_num
== 0)
13460 gfc_formal_arglist
*dummy_args
;
13462 dummy_args
= gfc_sym_get_dummy_args (proc
);
13463 if (stree
->n
.tb
->pass_arg
)
13465 gfc_formal_arglist
*i
;
13467 /* If an explicit passing argument name is given, walk the arg-list
13468 and look for it. */
13471 stree
->n
.tb
->pass_arg_num
= 1;
13472 for (i
= dummy_args
; i
; i
= i
->next
)
13474 if (!strcmp (i
->sym
->name
, stree
->n
.tb
->pass_arg
))
13479 ++stree
->n
.tb
->pass_arg_num
;
13484 gfc_error ("Procedure %qs with PASS(%s) at %L has no"
13486 proc
->name
, stree
->n
.tb
->pass_arg
, &where
,
13487 stree
->n
.tb
->pass_arg
);
13493 /* Otherwise, take the first one; there should in fact be at least
13495 stree
->n
.tb
->pass_arg_num
= 1;
13498 gfc_error ("Procedure %qs with PASS at %L must have at"
13499 " least one argument", proc
->name
, &where
);
13502 me_arg
= dummy_args
->sym
;
13505 /* Now check that the argument-type matches and the passed-object
13506 dummy argument is generally fine. */
13508 gcc_assert (me_arg
);
13510 if (me_arg
->ts
.type
!= BT_CLASS
)
13512 gfc_error ("Non-polymorphic passed-object dummy argument of %qs"
13513 " at %L", proc
->name
, &where
);
13517 if (CLASS_DATA (me_arg
)->ts
.u
.derived
13518 != resolve_bindings_derived
)
13520 gfc_error ("Argument %qs of %qs with PASS(%s) at %L must be of"
13521 " the derived-type %qs", me_arg
->name
, proc
->name
,
13522 me_arg
->name
, &where
, resolve_bindings_derived
->name
);
13526 gcc_assert (me_arg
->ts
.type
== BT_CLASS
);
13527 if (CLASS_DATA (me_arg
)->as
&& CLASS_DATA (me_arg
)->as
->rank
!= 0)
13529 gfc_error ("Passed-object dummy argument of %qs at %L must be"
13530 " scalar", proc
->name
, &where
);
13533 if (CLASS_DATA (me_arg
)->attr
.allocatable
)
13535 gfc_error ("Passed-object dummy argument of %qs at %L must not"
13536 " be ALLOCATABLE", proc
->name
, &where
);
13539 if (CLASS_DATA (me_arg
)->attr
.class_pointer
)
13541 gfc_error ("Passed-object dummy argument of %qs at %L must not"
13542 " be POINTER", proc
->name
, &where
);
13547 /* If we are extending some type, check that we don't override a procedure
13548 flagged NON_OVERRIDABLE. */
13549 stree
->n
.tb
->overridden
= NULL
;
13552 gfc_symtree
* overridden
;
13553 overridden
= gfc_find_typebound_proc (super_type
, NULL
,
13554 stree
->name
, true, NULL
);
13558 if (overridden
->n
.tb
)
13559 stree
->n
.tb
->overridden
= overridden
->n
.tb
;
13561 if (!gfc_check_typebound_override (stree
, overridden
))
13566 /* See if there's a name collision with a component directly in this type. */
13567 for (comp
= resolve_bindings_derived
->components
; comp
; comp
= comp
->next
)
13568 if (!strcmp (comp
->name
, stree
->name
))
13570 gfc_error ("Procedure %qs at %L has the same name as a component of"
13572 stree
->name
, &where
, resolve_bindings_derived
->name
);
13576 /* Try to find a name collision with an inherited component. */
13577 if (super_type
&& gfc_find_component (super_type
, stree
->name
, true, true,
13580 gfc_error ("Procedure %qs at %L has the same name as an inherited"
13581 " component of %qs",
13582 stree
->name
, &where
, resolve_bindings_derived
->name
);
13586 stree
->n
.tb
->error
= 0;
13590 resolve_bindings_result
= false;
13591 stree
->n
.tb
->error
= 1;
13596 resolve_typebound_procedures (gfc_symbol
* derived
)
13599 gfc_symbol
* super_type
;
13601 if (!derived
->f2k_derived
|| !derived
->f2k_derived
->tb_sym_root
)
13604 super_type
= gfc_get_derived_super_type (derived
);
13606 resolve_symbol (super_type
);
13608 resolve_bindings_derived
= derived
;
13609 resolve_bindings_result
= true;
13611 if (derived
->f2k_derived
->tb_sym_root
)
13612 gfc_traverse_symtree (derived
->f2k_derived
->tb_sym_root
,
13613 &resolve_typebound_procedure
);
13615 if (derived
->f2k_derived
->tb_uop_root
)
13616 gfc_traverse_symtree (derived
->f2k_derived
->tb_uop_root
,
13617 &resolve_typebound_user_op
);
13619 for (op
= 0; op
!= GFC_INTRINSIC_OPS
; ++op
)
13621 gfc_typebound_proc
* p
= derived
->f2k_derived
->tb_op
[op
];
13622 if (p
&& !resolve_typebound_intrinsic_op (derived
,
13623 (gfc_intrinsic_op
)op
, p
))
13624 resolve_bindings_result
= false;
13627 return resolve_bindings_result
;
13631 /* Add a derived type to the dt_list. The dt_list is used in trans-types.c
13632 to give all identical derived types the same backend_decl. */
13634 add_dt_to_dt_list (gfc_symbol
*derived
)
13636 if (!derived
->dt_next
)
13638 if (gfc_derived_types
)
13640 derived
->dt_next
= gfc_derived_types
->dt_next
;
13641 gfc_derived_types
->dt_next
= derived
;
13645 derived
->dt_next
= derived
;
13647 gfc_derived_types
= derived
;
13652 /* Ensure that a derived-type is really not abstract, meaning that every
13653 inherited DEFERRED binding is overridden by a non-DEFERRED one. */
13656 ensure_not_abstract_walker (gfc_symbol
* sub
, gfc_symtree
* st
)
13661 if (!ensure_not_abstract_walker (sub
, st
->left
))
13663 if (!ensure_not_abstract_walker (sub
, st
->right
))
13666 if (st
->n
.tb
&& st
->n
.tb
->deferred
)
13668 gfc_symtree
* overriding
;
13669 overriding
= gfc_find_typebound_proc (sub
, NULL
, st
->name
, true, NULL
);
13672 gcc_assert (overriding
->n
.tb
);
13673 if (overriding
->n
.tb
->deferred
)
13675 gfc_error ("Derived-type %qs declared at %L must be ABSTRACT because"
13676 " %qs is DEFERRED and not overridden",
13677 sub
->name
, &sub
->declared_at
, st
->name
);
13686 ensure_not_abstract (gfc_symbol
* sub
, gfc_symbol
* ancestor
)
13688 /* The algorithm used here is to recursively travel up the ancestry of sub
13689 and for each ancestor-type, check all bindings. If any of them is
13690 DEFERRED, look it up starting from sub and see if the found (overriding)
13691 binding is not DEFERRED.
13692 This is not the most efficient way to do this, but it should be ok and is
13693 clearer than something sophisticated. */
13695 gcc_assert (ancestor
&& !sub
->attr
.abstract
);
13697 if (!ancestor
->attr
.abstract
)
13700 /* Walk bindings of this ancestor. */
13701 if (ancestor
->f2k_derived
)
13704 t
= ensure_not_abstract_walker (sub
, ancestor
->f2k_derived
->tb_sym_root
);
13709 /* Find next ancestor type and recurse on it. */
13710 ancestor
= gfc_get_derived_super_type (ancestor
);
13712 return ensure_not_abstract (sub
, ancestor
);
13718 /* This check for typebound defined assignments is done recursively
13719 since the order in which derived types are resolved is not always in
13720 order of the declarations. */
13723 check_defined_assignments (gfc_symbol
*derived
)
13727 for (c
= derived
->components
; c
; c
= c
->next
)
13729 if (!gfc_bt_struct (c
->ts
.type
)
13731 || c
->attr
.allocatable
13732 || c
->attr
.proc_pointer_comp
13733 || c
->attr
.class_pointer
13734 || c
->attr
.proc_pointer
)
13737 if (c
->ts
.u
.derived
->attr
.defined_assign_comp
13738 || (c
->ts
.u
.derived
->f2k_derived
13739 && c
->ts
.u
.derived
->f2k_derived
->tb_op
[INTRINSIC_ASSIGN
]))
13741 derived
->attr
.defined_assign_comp
= 1;
13745 check_defined_assignments (c
->ts
.u
.derived
);
13746 if (c
->ts
.u
.derived
->attr
.defined_assign_comp
)
13748 derived
->attr
.defined_assign_comp
= 1;
13755 /* Resolve a single component of a derived type or structure. */
13758 resolve_component (gfc_component
*c
, gfc_symbol
*sym
)
13760 gfc_symbol
*super_type
;
13761 symbol_attribute
*attr
;
13763 if (c
->attr
.artificial
)
13766 /* Do not allow vtype components to be resolved in nameless namespaces
13767 such as block data because the procedure pointers will cause ICEs
13768 and vtables are not needed in these contexts. */
13769 if (sym
->attr
.vtype
&& sym
->attr
.use_assoc
13770 && sym
->ns
->proc_name
== NULL
)
13774 if ((!sym
->attr
.is_class
|| c
!= sym
->components
)
13775 && c
->attr
.codimension
13776 && (!c
->attr
.allocatable
|| (c
->as
&& c
->as
->type
!= AS_DEFERRED
)))
13778 gfc_error ("Coarray component %qs at %L must be allocatable with "
13779 "deferred shape", c
->name
, &c
->loc
);
13784 if (c
->attr
.codimension
&& c
->ts
.type
== BT_DERIVED
13785 && c
->ts
.u
.derived
->ts
.is_iso_c
)
13787 gfc_error ("Component %qs at %L of TYPE(C_PTR) or TYPE(C_FUNPTR) "
13788 "shall not be a coarray", c
->name
, &c
->loc
);
13793 if (gfc_bt_struct (c
->ts
.type
) && c
->ts
.u
.derived
->attr
.coarray_comp
13794 && (c
->attr
.codimension
|| c
->attr
.pointer
|| c
->attr
.dimension
13795 || c
->attr
.allocatable
))
13797 gfc_error ("Component %qs at %L with coarray component "
13798 "shall be a nonpointer, nonallocatable scalar",
13804 if (c
->ts
.type
== BT_CLASS
)
13806 if (CLASS_DATA (c
))
13808 attr
= &(CLASS_DATA (c
)->attr
);
13810 /* Fix up contiguous attribute. */
13811 if (c
->attr
.contiguous
)
13812 attr
->contiguous
= 1;
13820 if (attr
&& attr
->contiguous
&& (!attr
->dimension
|| !attr
->pointer
))
13822 gfc_error ("Component %qs at %L has the CONTIGUOUS attribute but "
13823 "is not an array pointer", c
->name
, &c
->loc
);
13827 /* F2003, 15.2.1 - length has to be one. */
13828 if (sym
->attr
.is_bind_c
&& c
->ts
.type
== BT_CHARACTER
13829 && (c
->ts
.u
.cl
== NULL
|| c
->ts
.u
.cl
->length
== NULL
13830 || !gfc_is_constant_expr (c
->ts
.u
.cl
->length
)
13831 || mpz_cmp_si (c
->ts
.u
.cl
->length
->value
.integer
, 1) != 0))
13833 gfc_error ("Component %qs of BIND(C) type at %L must have length one",
13838 if (c
->attr
.proc_pointer
&& c
->ts
.interface
)
13840 gfc_symbol
*ifc
= c
->ts
.interface
;
13842 if (!sym
->attr
.vtype
&& !check_proc_interface (ifc
, &c
->loc
))
13848 if (ifc
->attr
.if_source
|| ifc
->attr
.intrinsic
)
13850 /* Resolve interface and copy attributes. */
13851 if (ifc
->formal
&& !ifc
->formal_ns
)
13852 resolve_symbol (ifc
);
13853 if (ifc
->attr
.intrinsic
)
13854 gfc_resolve_intrinsic (ifc
, &ifc
->declared_at
);
13858 c
->ts
= ifc
->result
->ts
;
13859 c
->attr
.allocatable
= ifc
->result
->attr
.allocatable
;
13860 c
->attr
.pointer
= ifc
->result
->attr
.pointer
;
13861 c
->attr
.dimension
= ifc
->result
->attr
.dimension
;
13862 c
->as
= gfc_copy_array_spec (ifc
->result
->as
);
13863 c
->attr
.class_ok
= ifc
->result
->attr
.class_ok
;
13868 c
->attr
.allocatable
= ifc
->attr
.allocatable
;
13869 c
->attr
.pointer
= ifc
->attr
.pointer
;
13870 c
->attr
.dimension
= ifc
->attr
.dimension
;
13871 c
->as
= gfc_copy_array_spec (ifc
->as
);
13872 c
->attr
.class_ok
= ifc
->attr
.class_ok
;
13874 c
->ts
.interface
= ifc
;
13875 c
->attr
.function
= ifc
->attr
.function
;
13876 c
->attr
.subroutine
= ifc
->attr
.subroutine
;
13878 c
->attr
.pure
= ifc
->attr
.pure
;
13879 c
->attr
.elemental
= ifc
->attr
.elemental
;
13880 c
->attr
.recursive
= ifc
->attr
.recursive
;
13881 c
->attr
.always_explicit
= ifc
->attr
.always_explicit
;
13882 c
->attr
.ext_attr
|= ifc
->attr
.ext_attr
;
13883 /* Copy char length. */
13884 if (ifc
->ts
.type
== BT_CHARACTER
&& ifc
->ts
.u
.cl
)
13886 gfc_charlen
*cl
= gfc_new_charlen (sym
->ns
, ifc
->ts
.u
.cl
);
13887 if (cl
->length
&& !cl
->resolved
13888 && !gfc_resolve_expr (cl
->length
))
13897 else if (c
->attr
.proc_pointer
&& c
->ts
.type
== BT_UNKNOWN
)
13899 /* Since PPCs are not implicitly typed, a PPC without an explicit
13900 interface must be a subroutine. */
13901 gfc_add_subroutine (&c
->attr
, c
->name
, &c
->loc
);
13904 /* Procedure pointer components: Check PASS arg. */
13905 if (c
->attr
.proc_pointer
&& !c
->tb
->nopass
&& c
->tb
->pass_arg_num
== 0
13906 && !sym
->attr
.vtype
)
13908 gfc_symbol
* me_arg
;
13910 if (c
->tb
->pass_arg
)
13912 gfc_formal_arglist
* i
;
13914 /* If an explicit passing argument name is given, walk the arg-list
13915 and look for it. */
13918 c
->tb
->pass_arg_num
= 1;
13919 for (i
= c
->ts
.interface
->formal
; i
; i
= i
->next
)
13921 if (!strcmp (i
->sym
->name
, c
->tb
->pass_arg
))
13926 c
->tb
->pass_arg_num
++;
13931 gfc_error ("Procedure pointer component %qs with PASS(%s) "
13932 "at %L has no argument %qs", c
->name
,
13933 c
->tb
->pass_arg
, &c
->loc
, c
->tb
->pass_arg
);
13940 /* Otherwise, take the first one; there should in fact be at least
13942 c
->tb
->pass_arg_num
= 1;
13943 if (!c
->ts
.interface
->formal
)
13945 gfc_error ("Procedure pointer component %qs with PASS at %L "
13946 "must have at least one argument",
13951 me_arg
= c
->ts
.interface
->formal
->sym
;
13954 /* Now check that the argument-type matches. */
13955 gcc_assert (me_arg
);
13956 if ((me_arg
->ts
.type
!= BT_DERIVED
&& me_arg
->ts
.type
!= BT_CLASS
)
13957 || (me_arg
->ts
.type
== BT_DERIVED
&& me_arg
->ts
.u
.derived
!= sym
)
13958 || (me_arg
->ts
.type
== BT_CLASS
13959 && CLASS_DATA (me_arg
)->ts
.u
.derived
!= sym
))
13961 gfc_error ("Argument %qs of %qs with PASS(%s) at %L must be of"
13962 " the derived type %qs", me_arg
->name
, c
->name
,
13963 me_arg
->name
, &c
->loc
, sym
->name
);
13968 /* Check for F03:C453. */
13969 if (CLASS_DATA (me_arg
)->attr
.dimension
)
13971 gfc_error ("Argument %qs of %qs with PASS(%s) at %L "
13972 "must be scalar", me_arg
->name
, c
->name
, me_arg
->name
,
13978 if (CLASS_DATA (me_arg
)->attr
.class_pointer
)
13980 gfc_error ("Argument %qs of %qs with PASS(%s) at %L "
13981 "may not have the POINTER attribute", me_arg
->name
,
13982 c
->name
, me_arg
->name
, &c
->loc
);
13987 if (CLASS_DATA (me_arg
)->attr
.allocatable
)
13989 gfc_error ("Argument %qs of %qs with PASS(%s) at %L "
13990 "may not be ALLOCATABLE", me_arg
->name
, c
->name
,
13991 me_arg
->name
, &c
->loc
);
13996 if (gfc_type_is_extensible (sym
) && me_arg
->ts
.type
!= BT_CLASS
)
13998 gfc_error ("Non-polymorphic passed-object dummy argument of %qs"
13999 " at %L", c
->name
, &c
->loc
);
14005 /* Check type-spec if this is not the parent-type component. */
14006 if (((sym
->attr
.is_class
14007 && (!sym
->components
->ts
.u
.derived
->attr
.extension
14008 || c
!= sym
->components
->ts
.u
.derived
->components
))
14009 || (!sym
->attr
.is_class
14010 && (!sym
->attr
.extension
|| c
!= sym
->components
)))
14011 && !sym
->attr
.vtype
14012 && !resolve_typespec_used (&c
->ts
, &c
->loc
, c
->name
))
14015 super_type
= gfc_get_derived_super_type (sym
);
14017 /* If this type is an extension, set the accessibility of the parent
14020 && ((sym
->attr
.is_class
14021 && c
== sym
->components
->ts
.u
.derived
->components
)
14022 || (!sym
->attr
.is_class
&& c
== sym
->components
))
14023 && strcmp (super_type
->name
, c
->name
) == 0)
14024 c
->attr
.access
= super_type
->attr
.access
;
14026 /* If this type is an extension, see if this component has the same name
14027 as an inherited type-bound procedure. */
14028 if (super_type
&& !sym
->attr
.is_class
14029 && gfc_find_typebound_proc (super_type
, NULL
, c
->name
, true, NULL
))
14031 gfc_error ("Component %qs of %qs at %L has the same name as an"
14032 " inherited type-bound procedure",
14033 c
->name
, sym
->name
, &c
->loc
);
14037 if (c
->ts
.type
== BT_CHARACTER
&& !c
->attr
.proc_pointer
14038 && !c
->ts
.deferred
)
14040 if (c
->ts
.u
.cl
->length
== NULL
14041 || (!resolve_charlen(c
->ts
.u
.cl
))
14042 || !gfc_is_constant_expr (c
->ts
.u
.cl
->length
))
14044 gfc_error ("Character length of component %qs needs to "
14045 "be a constant specification expression at %L",
14047 c
->ts
.u
.cl
->length
? &c
->ts
.u
.cl
->length
->where
: &c
->loc
);
14052 if (c
->ts
.type
== BT_CHARACTER
&& c
->ts
.deferred
14053 && !c
->attr
.pointer
&& !c
->attr
.allocatable
)
14055 gfc_error ("Character component %qs of %qs at %L with deferred "
14056 "length must be a POINTER or ALLOCATABLE",
14057 c
->name
, sym
->name
, &c
->loc
);
14061 /* Add the hidden deferred length field. */
14062 if (c
->ts
.type
== BT_CHARACTER
14063 && (c
->ts
.deferred
|| c
->attr
.pdt_string
)
14064 && !c
->attr
.function
14065 && !sym
->attr
.is_class
)
14067 char name
[GFC_MAX_SYMBOL_LEN
+9];
14068 gfc_component
*strlen
;
14069 sprintf (name
, "_%s_length", c
->name
);
14070 strlen
= gfc_find_component (sym
, name
, true, true, NULL
);
14071 if (strlen
== NULL
)
14073 if (!gfc_add_component (sym
, name
, &strlen
))
14075 strlen
->ts
.type
= BT_INTEGER
;
14076 strlen
->ts
.kind
= gfc_charlen_int_kind
;
14077 strlen
->attr
.access
= ACCESS_PRIVATE
;
14078 strlen
->attr
.artificial
= 1;
14082 if (c
->ts
.type
== BT_DERIVED
14083 && sym
->component_access
!= ACCESS_PRIVATE
14084 && gfc_check_symbol_access (sym
)
14085 && !is_sym_host_assoc (c
->ts
.u
.derived
, sym
->ns
)
14086 && !c
->ts
.u
.derived
->attr
.use_assoc
14087 && !gfc_check_symbol_access (c
->ts
.u
.derived
)
14088 && !gfc_notify_std (GFC_STD_F2003
, "the component %qs is a "
14089 "PRIVATE type and cannot be a component of "
14090 "%qs, which is PUBLIC at %L", c
->name
,
14091 sym
->name
, &sym
->declared_at
))
14094 if ((sym
->attr
.sequence
|| sym
->attr
.is_bind_c
) && c
->ts
.type
== BT_CLASS
)
14096 gfc_error ("Polymorphic component %s at %L in SEQUENCE or BIND(C) "
14097 "type %s", c
->name
, &c
->loc
, sym
->name
);
14101 if (sym
->attr
.sequence
)
14103 if (c
->ts
.type
== BT_DERIVED
&& c
->ts
.u
.derived
->attr
.sequence
== 0)
14105 gfc_error ("Component %s of SEQUENCE type declared at %L does "
14106 "not have the SEQUENCE attribute",
14107 c
->ts
.u
.derived
->name
, &sym
->declared_at
);
14112 if (c
->ts
.type
== BT_DERIVED
&& c
->ts
.u
.derived
->attr
.generic
)
14113 c
->ts
.u
.derived
= gfc_find_dt_in_generic (c
->ts
.u
.derived
);
14114 else if (c
->ts
.type
== BT_CLASS
&& c
->attr
.class_ok
14115 && CLASS_DATA (c
)->ts
.u
.derived
->attr
.generic
)
14116 CLASS_DATA (c
)->ts
.u
.derived
14117 = gfc_find_dt_in_generic (CLASS_DATA (c
)->ts
.u
.derived
);
14119 /* If an allocatable component derived type is of the same type as
14120 the enclosing derived type, we need a vtable generating so that
14121 the __deallocate procedure is created. */
14122 if ((c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
14123 && c
->ts
.u
.derived
== sym
&& c
->attr
.allocatable
== 1)
14124 gfc_find_vtab (&c
->ts
);
14126 /* Ensure that all the derived type components are put on the
14127 derived type list; even in formal namespaces, where derived type
14128 pointer components might not have been declared. */
14129 if (c
->ts
.type
== BT_DERIVED
14131 && c
->ts
.u
.derived
->components
14133 && sym
!= c
->ts
.u
.derived
)
14134 add_dt_to_dt_list (c
->ts
.u
.derived
);
14136 if (!gfc_resolve_array_spec (c
->as
,
14137 !(c
->attr
.pointer
|| c
->attr
.proc_pointer
14138 || c
->attr
.allocatable
)))
14141 if (c
->initializer
&& !sym
->attr
.vtype
14142 && !c
->attr
.pdt_kind
&& !c
->attr
.pdt_len
14143 && !gfc_check_assign_symbol (sym
, c
, c
->initializer
))
14150 /* Be nice about the locus for a structure expression - show the locus of the
14151 first non-null sub-expression if we can. */
14154 cons_where (gfc_expr
*struct_expr
)
14156 gfc_constructor
*cons
;
14158 gcc_assert (struct_expr
&& struct_expr
->expr_type
== EXPR_STRUCTURE
);
14160 cons
= gfc_constructor_first (struct_expr
->value
.constructor
);
14161 for (; cons
; cons
= gfc_constructor_next (cons
))
14163 if (cons
->expr
&& cons
->expr
->expr_type
!= EXPR_NULL
)
14164 return &cons
->expr
->where
;
14167 return &struct_expr
->where
;
14170 /* Resolve the components of a structure type. Much less work than derived
14174 resolve_fl_struct (gfc_symbol
*sym
)
14177 gfc_expr
*init
= NULL
;
14180 /* Make sure UNIONs do not have overlapping initializers. */
14181 if (sym
->attr
.flavor
== FL_UNION
)
14183 for (c
= sym
->components
; c
; c
= c
->next
)
14185 if (init
&& c
->initializer
)
14187 gfc_error ("Conflicting initializers in union at %L and %L",
14188 cons_where (init
), cons_where (c
->initializer
));
14189 gfc_free_expr (c
->initializer
);
14190 c
->initializer
= NULL
;
14193 init
= c
->initializer
;
14198 for (c
= sym
->components
; c
; c
= c
->next
)
14199 if (!resolve_component (c
, sym
))
14205 if (sym
->components
)
14206 add_dt_to_dt_list (sym
);
14212 /* Resolve the components of a derived type. This does not have to wait until
14213 resolution stage, but can be done as soon as the dt declaration has been
14217 resolve_fl_derived0 (gfc_symbol
*sym
)
14219 gfc_symbol
* super_type
;
14221 gfc_formal_arglist
*f
;
14224 if (sym
->attr
.unlimited_polymorphic
)
14227 super_type
= gfc_get_derived_super_type (sym
);
14230 if (super_type
&& sym
->attr
.coarray_comp
&& !super_type
->attr
.coarray_comp
)
14232 gfc_error ("As extending type %qs at %L has a coarray component, "
14233 "parent type %qs shall also have one", sym
->name
,
14234 &sym
->declared_at
, super_type
->name
);
14238 /* Ensure the extended type gets resolved before we do. */
14239 if (super_type
&& !resolve_fl_derived0 (super_type
))
14242 /* An ABSTRACT type must be extensible. */
14243 if (sym
->attr
.abstract
&& !gfc_type_is_extensible (sym
))
14245 gfc_error ("Non-extensible derived-type %qs at %L must not be ABSTRACT",
14246 sym
->name
, &sym
->declared_at
);
14250 c
= (sym
->attr
.is_class
) ? sym
->components
->ts
.u
.derived
->components
14254 for ( ; c
!= NULL
; c
= c
->next
)
14255 if (!resolve_component (c
, sym
))
14261 /* Now add the caf token field, where needed. */
14262 if (flag_coarray
!= GFC_FCOARRAY_NONE
14263 && !sym
->attr
.is_class
&& !sym
->attr
.vtype
)
14265 for (c
= sym
->components
; c
; c
= c
->next
)
14266 if (!c
->attr
.dimension
&& !c
->attr
.codimension
14267 && (c
->attr
.allocatable
|| c
->attr
.pointer
))
14269 char name
[GFC_MAX_SYMBOL_LEN
+9];
14270 gfc_component
*token
;
14271 sprintf (name
, "_caf_%s", c
->name
);
14272 token
= gfc_find_component (sym
, name
, true, true, NULL
);
14275 if (!gfc_add_component (sym
, name
, &token
))
14277 token
->ts
.type
= BT_VOID
;
14278 token
->ts
.kind
= gfc_default_integer_kind
;
14279 token
->attr
.access
= ACCESS_PRIVATE
;
14280 token
->attr
.artificial
= 1;
14281 token
->attr
.caf_token
= 1;
14286 check_defined_assignments (sym
);
14288 if (!sym
->attr
.defined_assign_comp
&& super_type
)
14289 sym
->attr
.defined_assign_comp
14290 = super_type
->attr
.defined_assign_comp
;
14292 /* If this is a non-ABSTRACT type extending an ABSTRACT one, ensure that
14293 all DEFERRED bindings are overridden. */
14294 if (super_type
&& super_type
->attr
.abstract
&& !sym
->attr
.abstract
14295 && !sym
->attr
.is_class
14296 && !ensure_not_abstract (sym
, super_type
))
14299 /* Check that there is a component for every PDT parameter. */
14300 if (sym
->attr
.pdt_template
)
14302 for (f
= sym
->formal
; f
; f
= f
->next
)
14306 c
= gfc_find_component (sym
, f
->sym
->name
, true, true, NULL
);
14309 gfc_error ("Parameterized type %qs does not have a component "
14310 "corresponding to parameter %qs at %L", sym
->name
,
14311 f
->sym
->name
, &sym
->declared_at
);
14317 /* Add derived type to the derived type list. */
14318 add_dt_to_dt_list (sym
);
14324 /* The following procedure does the full resolution of a derived type,
14325 including resolution of all type-bound procedures (if present). In contrast
14326 to 'resolve_fl_derived0' this can only be done after the module has been
14327 parsed completely. */
14330 resolve_fl_derived (gfc_symbol
*sym
)
14332 gfc_symbol
*gen_dt
= NULL
;
14334 if (sym
->attr
.unlimited_polymorphic
)
14337 if (!sym
->attr
.is_class
)
14338 gfc_find_symbol (sym
->name
, sym
->ns
, 0, &gen_dt
);
14339 if (gen_dt
&& gen_dt
->generic
&& gen_dt
->generic
->next
14340 && (!gen_dt
->generic
->sym
->attr
.use_assoc
14341 || gen_dt
->generic
->sym
->module
!= gen_dt
->generic
->next
->sym
->module
)
14342 && !gfc_notify_std (GFC_STD_F2003
, "Generic name %qs of function "
14343 "%qs at %L being the same name as derived "
14344 "type at %L", sym
->name
,
14345 gen_dt
->generic
->sym
== sym
14346 ? gen_dt
->generic
->next
->sym
->name
14347 : gen_dt
->generic
->sym
->name
,
14348 gen_dt
->generic
->sym
== sym
14349 ? &gen_dt
->generic
->next
->sym
->declared_at
14350 : &gen_dt
->generic
->sym
->declared_at
,
14351 &sym
->declared_at
))
14354 if (sym
->components
== NULL
&& !sym
->attr
.zero_comp
&& !sym
->attr
.use_assoc
)
14356 gfc_error ("Derived type %qs at %L has not been declared",
14357 sym
->name
, &sym
->declared_at
);
14361 /* Resolve the finalizer procedures. */
14362 if (!gfc_resolve_finalizers (sym
, NULL
))
14365 if (sym
->attr
.is_class
&& sym
->ts
.u
.derived
== NULL
)
14367 /* Fix up incomplete CLASS symbols. */
14368 gfc_component
*data
= gfc_find_component (sym
, "_data", true, true, NULL
);
14369 gfc_component
*vptr
= gfc_find_component (sym
, "_vptr", true, true, NULL
);
14371 /* Nothing more to do for unlimited polymorphic entities. */
14372 if (data
->ts
.u
.derived
->attr
.unlimited_polymorphic
)
14374 else if (vptr
->ts
.u
.derived
== NULL
)
14376 gfc_symbol
*vtab
= gfc_find_derived_vtab (data
->ts
.u
.derived
);
14378 vptr
->ts
.u
.derived
= vtab
->ts
.u
.derived
;
14379 if (!resolve_fl_derived0 (vptr
->ts
.u
.derived
))
14384 if (!resolve_fl_derived0 (sym
))
14387 /* Resolve the type-bound procedures. */
14388 if (!resolve_typebound_procedures (sym
))
14391 /* Generate module vtables subject to their accessibility and their not
14392 being vtables or pdt templates. If this is not done class declarations
14393 in external procedures wind up with their own version and so SELECT TYPE
14394 fails because the vptrs do not have the same address. */
14395 if (gfc_option
.allow_std
& GFC_STD_F2003
14396 && sym
->ns
->proc_name
14397 && sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
14398 && sym
->attr
.access
!= ACCESS_PRIVATE
14399 && !(sym
->attr
.use_assoc
|| sym
->attr
.vtype
|| sym
->attr
.pdt_template
))
14401 gfc_symbol
*vtab
= gfc_find_derived_vtab (sym
);
14402 gfc_set_sym_referenced (vtab
);
14410 resolve_fl_namelist (gfc_symbol
*sym
)
14415 for (nl
= sym
->namelist
; nl
; nl
= nl
->next
)
14417 /* Check again, the check in match only works if NAMELIST comes
14419 if (nl
->sym
->as
&& nl
->sym
->as
->type
== AS_ASSUMED_SIZE
)
14421 gfc_error ("Assumed size array %qs in namelist %qs at %L is not "
14422 "allowed", nl
->sym
->name
, sym
->name
, &sym
->declared_at
);
14426 if (nl
->sym
->as
&& nl
->sym
->as
->type
== AS_ASSUMED_SHAPE
14427 && !gfc_notify_std (GFC_STD_F2003
, "NAMELIST array object %qs "
14428 "with assumed shape in namelist %qs at %L",
14429 nl
->sym
->name
, sym
->name
, &sym
->declared_at
))
14432 if (is_non_constant_shape_array (nl
->sym
)
14433 && !gfc_notify_std (GFC_STD_F2003
, "NAMELIST array object %qs "
14434 "with nonconstant shape in namelist %qs at %L",
14435 nl
->sym
->name
, sym
->name
, &sym
->declared_at
))
14438 if (nl
->sym
->ts
.type
== BT_CHARACTER
14439 && (nl
->sym
->ts
.u
.cl
->length
== NULL
14440 || !gfc_is_constant_expr (nl
->sym
->ts
.u
.cl
->length
))
14441 && !gfc_notify_std (GFC_STD_F2003
, "NAMELIST object %qs with "
14442 "nonconstant character length in "
14443 "namelist %qs at %L", nl
->sym
->name
,
14444 sym
->name
, &sym
->declared_at
))
14449 /* Reject PRIVATE objects in a PUBLIC namelist. */
14450 if (gfc_check_symbol_access (sym
))
14452 for (nl
= sym
->namelist
; nl
; nl
= nl
->next
)
14454 if (!nl
->sym
->attr
.use_assoc
14455 && !is_sym_host_assoc (nl
->sym
, sym
->ns
)
14456 && !gfc_check_symbol_access (nl
->sym
))
14458 gfc_error ("NAMELIST object %qs was declared PRIVATE and "
14459 "cannot be member of PUBLIC namelist %qs at %L",
14460 nl
->sym
->name
, sym
->name
, &sym
->declared_at
);
14464 if (nl
->sym
->ts
.type
== BT_DERIVED
14465 && (nl
->sym
->ts
.u
.derived
->attr
.alloc_comp
14466 || nl
->sym
->ts
.u
.derived
->attr
.pointer_comp
))
14468 if (!gfc_notify_std (GFC_STD_F2003
, "NAMELIST object %qs in "
14469 "namelist %qs at %L with ALLOCATABLE "
14470 "or POINTER components", nl
->sym
->name
,
14471 sym
->name
, &sym
->declared_at
))
14476 /* Types with private components that came here by USE-association. */
14477 if (nl
->sym
->ts
.type
== BT_DERIVED
14478 && derived_inaccessible (nl
->sym
->ts
.u
.derived
))
14480 gfc_error ("NAMELIST object %qs has use-associated PRIVATE "
14481 "components and cannot be member of namelist %qs at %L",
14482 nl
->sym
->name
, sym
->name
, &sym
->declared_at
);
14486 /* Types with private components that are defined in the same module. */
14487 if (nl
->sym
->ts
.type
== BT_DERIVED
14488 && !is_sym_host_assoc (nl
->sym
->ts
.u
.derived
, sym
->ns
)
14489 && nl
->sym
->ts
.u
.derived
->attr
.private_comp
)
14491 gfc_error ("NAMELIST object %qs has PRIVATE components and "
14492 "cannot be a member of PUBLIC namelist %qs at %L",
14493 nl
->sym
->name
, sym
->name
, &sym
->declared_at
);
14500 /* 14.1.2 A module or internal procedure represent local entities
14501 of the same type as a namelist member and so are not allowed. */
14502 for (nl
= sym
->namelist
; nl
; nl
= nl
->next
)
14504 if (nl
->sym
->ts
.kind
!= 0 && nl
->sym
->attr
.flavor
== FL_VARIABLE
)
14507 if (nl
->sym
->attr
.function
&& nl
->sym
== nl
->sym
->result
)
14508 if ((nl
->sym
== sym
->ns
->proc_name
)
14510 (sym
->ns
->parent
&& nl
->sym
== sym
->ns
->parent
->proc_name
))
14515 gfc_find_symbol (nl
->sym
->name
, sym
->ns
, 1, &nlsym
);
14516 if (nlsym
&& nlsym
->attr
.flavor
== FL_PROCEDURE
)
14518 gfc_error ("PROCEDURE attribute conflicts with NAMELIST "
14519 "attribute in %qs at %L", nlsym
->name
,
14520 &sym
->declared_at
);
14527 for (nl
= sym
->namelist
; nl
; nl
= nl
->next
)
14528 nl
->sym
->attr
.asynchronous
= 1;
14535 resolve_fl_parameter (gfc_symbol
*sym
)
14537 /* A parameter array's shape needs to be constant. */
14538 if (sym
->as
!= NULL
14539 && (sym
->as
->type
== AS_DEFERRED
14540 || is_non_constant_shape_array (sym
)))
14542 gfc_error ("Parameter array %qs at %L cannot be automatic "
14543 "or of deferred shape", sym
->name
, &sym
->declared_at
);
14547 /* Constraints on deferred type parameter. */
14548 if (!deferred_requirements (sym
))
14551 /* Make sure a parameter that has been implicitly typed still
14552 matches the implicit type, since PARAMETER statements can precede
14553 IMPLICIT statements. */
14554 if (sym
->attr
.implicit_type
14555 && !gfc_compare_types (&sym
->ts
, gfc_get_default_type (sym
->name
,
14558 gfc_error ("Implicitly typed PARAMETER %qs at %L doesn't match a "
14559 "later IMPLICIT type", sym
->name
, &sym
->declared_at
);
14563 /* Make sure the types of derived parameters are consistent. This
14564 type checking is deferred until resolution because the type may
14565 refer to a derived type from the host. */
14566 if (sym
->ts
.type
== BT_DERIVED
14567 && !gfc_compare_types (&sym
->ts
, &sym
->value
->ts
))
14569 gfc_error ("Incompatible derived type in PARAMETER at %L",
14570 &sym
->value
->where
);
14574 /* F03:C509,C514. */
14575 if (sym
->ts
.type
== BT_CLASS
)
14577 gfc_error ("CLASS variable %qs at %L cannot have the PARAMETER attribute",
14578 sym
->name
, &sym
->declared_at
);
14586 /* Called by resolve_symbol to check PDTs. */
14589 resolve_pdt (gfc_symbol
* sym
)
14591 gfc_symbol
*derived
= NULL
;
14592 gfc_actual_arglist
*param
;
14594 bool const_len_exprs
= true;
14595 bool assumed_len_exprs
= false;
14596 symbol_attribute
*attr
;
14598 if (sym
->ts
.type
== BT_DERIVED
)
14600 derived
= sym
->ts
.u
.derived
;
14601 attr
= &(sym
->attr
);
14603 else if (sym
->ts
.type
== BT_CLASS
)
14605 derived
= CLASS_DATA (sym
)->ts
.u
.derived
;
14606 attr
= &(CLASS_DATA (sym
)->attr
);
14609 gcc_unreachable ();
14611 gcc_assert (derived
->attr
.pdt_type
);
14613 for (param
= sym
->param_list
; param
; param
= param
->next
)
14615 c
= gfc_find_component (derived
, param
->name
, false, true, NULL
);
14617 if (c
->attr
.pdt_kind
)
14620 if (param
->expr
&& !gfc_is_constant_expr (param
->expr
)
14621 && c
->attr
.pdt_len
)
14622 const_len_exprs
= false;
14623 else if (param
->spec_type
== SPEC_ASSUMED
)
14624 assumed_len_exprs
= true;
14626 if (param
->spec_type
== SPEC_DEFERRED
14627 && !attr
->allocatable
&& !attr
->pointer
)
14628 gfc_error ("The object %qs at %L has a deferred LEN "
14629 "parameter %qs and is neither allocatable "
14630 "nor a pointer", sym
->name
, &sym
->declared_at
,
14635 if (!const_len_exprs
14636 && (sym
->ns
->proc_name
->attr
.is_main_program
14637 || sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
14638 || sym
->attr
.save
!= SAVE_NONE
))
14639 gfc_error ("The AUTOMATIC object %qs at %L must not have the "
14640 "SAVE attribute or be a variable declared in the "
14641 "main program, a module or a submodule(F08/C513)",
14642 sym
->name
, &sym
->declared_at
);
14644 if (assumed_len_exprs
&& !(sym
->attr
.dummy
14645 || sym
->attr
.select_type_temporary
|| sym
->attr
.associate_var
))
14646 gfc_error ("The object %qs at %L with ASSUMED type parameters "
14647 "must be a dummy or a SELECT TYPE selector(F08/4.2)",
14648 sym
->name
, &sym
->declared_at
);
14652 /* Do anything necessary to resolve a symbol. Right now, we just
14653 assume that an otherwise unknown symbol is a variable. This sort
14654 of thing commonly happens for symbols in module. */
14657 resolve_symbol (gfc_symbol
*sym
)
14659 int check_constant
, mp_flag
;
14660 gfc_symtree
*symtree
;
14661 gfc_symtree
*this_symtree
;
14664 symbol_attribute class_attr
;
14665 gfc_array_spec
*as
;
14666 bool saved_specification_expr
;
14672 /* No symbol will ever have union type; only components can be unions.
14673 Union type declaration symbols have type BT_UNKNOWN but flavor FL_UNION
14674 (just like derived type declaration symbols have flavor FL_DERIVED). */
14675 gcc_assert (sym
->ts
.type
!= BT_UNION
);
14677 /* Coarrayed polymorphic objects with allocatable or pointer components are
14678 yet unsupported for -fcoarray=lib. */
14679 if (flag_coarray
== GFC_FCOARRAY_LIB
&& sym
->ts
.type
== BT_CLASS
14680 && sym
->ts
.u
.derived
&& CLASS_DATA (sym
)
14681 && CLASS_DATA (sym
)->attr
.codimension
14682 && (CLASS_DATA (sym
)->ts
.u
.derived
->attr
.alloc_comp
14683 || CLASS_DATA (sym
)->ts
.u
.derived
->attr
.pointer_comp
))
14685 gfc_error ("Sorry, allocatable/pointer components in polymorphic (CLASS) "
14686 "type coarrays at %L are unsupported", &sym
->declared_at
);
14690 if (sym
->attr
.artificial
)
14693 if (sym
->attr
.unlimited_polymorphic
)
14696 if (sym
->attr
.flavor
== FL_UNKNOWN
14697 || (sym
->attr
.flavor
== FL_PROCEDURE
&& !sym
->attr
.intrinsic
14698 && !sym
->attr
.generic
&& !sym
->attr
.external
14699 && sym
->attr
.if_source
== IFSRC_UNKNOWN
14700 && sym
->ts
.type
== BT_UNKNOWN
))
14703 /* If we find that a flavorless symbol is an interface in one of the
14704 parent namespaces, find its symtree in this namespace, free the
14705 symbol and set the symtree to point to the interface symbol. */
14706 for (ns
= gfc_current_ns
->parent
; ns
; ns
= ns
->parent
)
14708 symtree
= gfc_find_symtree (ns
->sym_root
, sym
->name
);
14709 if (symtree
&& (symtree
->n
.sym
->generic
||
14710 (symtree
->n
.sym
->attr
.flavor
== FL_PROCEDURE
14711 && sym
->ns
->construct_entities
)))
14713 this_symtree
= gfc_find_symtree (gfc_current_ns
->sym_root
,
14715 if (this_symtree
->n
.sym
== sym
)
14717 symtree
->n
.sym
->refs
++;
14718 gfc_release_symbol (sym
);
14719 this_symtree
->n
.sym
= symtree
->n
.sym
;
14725 /* Otherwise give it a flavor according to such attributes as
14727 if (sym
->attr
.flavor
== FL_UNKNOWN
&& sym
->attr
.external
== 0
14728 && sym
->attr
.intrinsic
== 0)
14729 sym
->attr
.flavor
= FL_VARIABLE
;
14730 else if (sym
->attr
.flavor
== FL_UNKNOWN
)
14732 sym
->attr
.flavor
= FL_PROCEDURE
;
14733 if (sym
->attr
.dimension
)
14734 sym
->attr
.function
= 1;
14738 if (sym
->attr
.external
&& sym
->ts
.type
!= BT_UNKNOWN
&& !sym
->attr
.function
)
14739 gfc_add_function (&sym
->attr
, sym
->name
, &sym
->declared_at
);
14741 if (sym
->attr
.procedure
&& sym
->attr
.if_source
!= IFSRC_DECL
14742 && !resolve_procedure_interface (sym
))
14745 if (sym
->attr
.is_protected
&& !sym
->attr
.proc_pointer
14746 && (sym
->attr
.procedure
|| sym
->attr
.external
))
14748 if (sym
->attr
.external
)
14749 gfc_error ("PROTECTED attribute conflicts with EXTERNAL attribute "
14750 "at %L", &sym
->declared_at
);
14752 gfc_error ("PROCEDURE attribute conflicts with PROTECTED attribute "
14753 "at %L", &sym
->declared_at
);
14758 if (sym
->attr
.flavor
== FL_DERIVED
&& !resolve_fl_derived (sym
))
14761 else if ((sym
->attr
.flavor
== FL_STRUCT
|| sym
->attr
.flavor
== FL_UNION
)
14762 && !resolve_fl_struct (sym
))
14765 /* Symbols that are module procedures with results (functions) have
14766 the types and array specification copied for type checking in
14767 procedures that call them, as well as for saving to a module
14768 file. These symbols can't stand the scrutiny that their results
14770 mp_flag
= (sym
->result
!= NULL
&& sym
->result
!= sym
);
14772 /* Make sure that the intrinsic is consistent with its internal
14773 representation. This needs to be done before assigning a default
14774 type to avoid spurious warnings. */
14775 if (sym
->attr
.flavor
!= FL_MODULE
&& sym
->attr
.intrinsic
14776 && !gfc_resolve_intrinsic (sym
, &sym
->declared_at
))
14779 /* Resolve associate names. */
14781 resolve_assoc_var (sym
, true);
14783 /* Assign default type to symbols that need one and don't have one. */
14784 if (sym
->ts
.type
== BT_UNKNOWN
)
14786 if (sym
->attr
.flavor
== FL_VARIABLE
|| sym
->attr
.flavor
== FL_PARAMETER
)
14788 gfc_set_default_type (sym
, 1, NULL
);
14791 if (sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.external
14792 && !sym
->attr
.function
&& !sym
->attr
.subroutine
14793 && gfc_get_default_type (sym
->name
, sym
->ns
)->type
== BT_UNKNOWN
)
14794 gfc_add_subroutine (&sym
->attr
, sym
->name
, &sym
->declared_at
);
14796 if (sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.function
)
14798 /* The specific case of an external procedure should emit an error
14799 in the case that there is no implicit type. */
14802 if (!sym
->attr
.mixed_entry_master
)
14803 gfc_set_default_type (sym
, sym
->attr
.external
, NULL
);
14807 /* Result may be in another namespace. */
14808 resolve_symbol (sym
->result
);
14810 if (!sym
->result
->attr
.proc_pointer
)
14812 sym
->ts
= sym
->result
->ts
;
14813 sym
->as
= gfc_copy_array_spec (sym
->result
->as
);
14814 sym
->attr
.dimension
= sym
->result
->attr
.dimension
;
14815 sym
->attr
.pointer
= sym
->result
->attr
.pointer
;
14816 sym
->attr
.allocatable
= sym
->result
->attr
.allocatable
;
14817 sym
->attr
.contiguous
= sym
->result
->attr
.contiguous
;
14822 else if (mp_flag
&& sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.function
)
14824 bool saved_specification_expr
= specification_expr
;
14825 specification_expr
= true;
14826 gfc_resolve_array_spec (sym
->result
->as
, false);
14827 specification_expr
= saved_specification_expr
;
14830 if (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
)
14832 as
= CLASS_DATA (sym
)->as
;
14833 class_attr
= CLASS_DATA (sym
)->attr
;
14834 class_attr
.pointer
= class_attr
.class_pointer
;
14838 class_attr
= sym
->attr
;
14843 if (sym
->attr
.contiguous
14844 && (!class_attr
.dimension
14845 || (as
->type
!= AS_ASSUMED_SHAPE
&& as
->type
!= AS_ASSUMED_RANK
14846 && !class_attr
.pointer
)))
14848 gfc_error ("%qs at %L has the CONTIGUOUS attribute but is not an "
14849 "array pointer or an assumed-shape or assumed-rank array",
14850 sym
->name
, &sym
->declared_at
);
14854 /* Assumed size arrays and assumed shape arrays must be dummy
14855 arguments. Array-spec's of implied-shape should have been resolved to
14856 AS_EXPLICIT already. */
14860 /* If AS_IMPLIED_SHAPE makes it to here, it must be a bad
14861 specification expression. */
14862 if (as
->type
== AS_IMPLIED_SHAPE
)
14865 for (i
=0; i
<as
->rank
; i
++)
14867 if (as
->lower
[i
] != NULL
&& as
->upper
[i
] == NULL
)
14869 gfc_error ("Bad specification for assumed size array at %L",
14870 &as
->lower
[i
]->where
);
14877 if (((as
->type
== AS_ASSUMED_SIZE
&& !as
->cp_was_assumed
)
14878 || as
->type
== AS_ASSUMED_SHAPE
)
14879 && !sym
->attr
.dummy
&& !sym
->attr
.select_type_temporary
)
14881 if (as
->type
== AS_ASSUMED_SIZE
)
14882 gfc_error ("Assumed size array at %L must be a dummy argument",
14883 &sym
->declared_at
);
14885 gfc_error ("Assumed shape array at %L must be a dummy argument",
14886 &sym
->declared_at
);
14889 /* TS 29113, C535a. */
14890 if (as
->type
== AS_ASSUMED_RANK
&& !sym
->attr
.dummy
14891 && !sym
->attr
.select_type_temporary
)
14893 gfc_error ("Assumed-rank array at %L must be a dummy argument",
14894 &sym
->declared_at
);
14897 if (as
->type
== AS_ASSUMED_RANK
14898 && (sym
->attr
.codimension
|| sym
->attr
.value
))
14900 gfc_error ("Assumed-rank array at %L may not have the VALUE or "
14901 "CODIMENSION attribute", &sym
->declared_at
);
14906 /* Make sure symbols with known intent or optional are really dummy
14907 variable. Because of ENTRY statement, this has to be deferred
14908 until resolution time. */
14910 if (!sym
->attr
.dummy
14911 && (sym
->attr
.optional
|| sym
->attr
.intent
!= INTENT_UNKNOWN
))
14913 gfc_error ("Symbol at %L is not a DUMMY variable", &sym
->declared_at
);
14917 if (sym
->attr
.value
&& !sym
->attr
.dummy
)
14919 gfc_error ("%qs at %L cannot have the VALUE attribute because "
14920 "it is not a dummy argument", sym
->name
, &sym
->declared_at
);
14924 if (sym
->attr
.value
&& sym
->ts
.type
== BT_CHARACTER
)
14926 gfc_charlen
*cl
= sym
->ts
.u
.cl
;
14927 if (!cl
|| !cl
->length
|| cl
->length
->expr_type
!= EXPR_CONSTANT
)
14929 gfc_error ("Character dummy variable %qs at %L with VALUE "
14930 "attribute must have constant length",
14931 sym
->name
, &sym
->declared_at
);
14935 if (sym
->ts
.is_c_interop
14936 && mpz_cmp_si (cl
->length
->value
.integer
, 1) != 0)
14938 gfc_error ("C interoperable character dummy variable %qs at %L "
14939 "with VALUE attribute must have length one",
14940 sym
->name
, &sym
->declared_at
);
14945 if (sym
->ts
.type
== BT_DERIVED
&& !sym
->attr
.is_iso_c
14946 && sym
->ts
.u
.derived
->attr
.generic
)
14948 sym
->ts
.u
.derived
= gfc_find_dt_in_generic (sym
->ts
.u
.derived
);
14949 if (!sym
->ts
.u
.derived
)
14951 gfc_error ("The derived type %qs at %L is of type %qs, "
14952 "which has not been defined", sym
->name
,
14953 &sym
->declared_at
, sym
->ts
.u
.derived
->name
);
14954 sym
->ts
.type
= BT_UNKNOWN
;
14959 /* Use the same constraints as TYPE(*), except for the type check
14960 and that only scalars and assumed-size arrays are permitted. */
14961 if (sym
->attr
.ext_attr
& (1 << EXT_ATTR_NO_ARG_CHECK
))
14963 if (!sym
->attr
.dummy
)
14965 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute shall be "
14966 "a dummy argument", sym
->name
, &sym
->declared_at
);
14970 if (sym
->ts
.type
!= BT_ASSUMED
&& sym
->ts
.type
!= BT_INTEGER
14971 && sym
->ts
.type
!= BT_REAL
&& sym
->ts
.type
!= BT_LOGICAL
14972 && sym
->ts
.type
!= BT_COMPLEX
)
14974 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute shall be "
14975 "of type TYPE(*) or of an numeric intrinsic type",
14976 sym
->name
, &sym
->declared_at
);
14980 if (sym
->attr
.allocatable
|| sym
->attr
.codimension
14981 || sym
->attr
.pointer
|| sym
->attr
.value
)
14983 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute may not "
14984 "have the ALLOCATABLE, CODIMENSION, POINTER or VALUE "
14985 "attribute", sym
->name
, &sym
->declared_at
);
14989 if (sym
->attr
.intent
== INTENT_OUT
)
14991 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute may not "
14992 "have the INTENT(OUT) attribute",
14993 sym
->name
, &sym
->declared_at
);
14996 if (sym
->attr
.dimension
&& sym
->as
->type
!= AS_ASSUMED_SIZE
)
14998 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute shall "
14999 "either be a scalar or an assumed-size array",
15000 sym
->name
, &sym
->declared_at
);
15004 /* Set the type to TYPE(*) and add a dimension(*) to ensure
15005 NO_ARG_CHECK is correctly handled in trans*.c, e.g. with
15007 sym
->ts
.type
= BT_ASSUMED
;
15008 sym
->as
= gfc_get_array_spec ();
15009 sym
->as
->type
= AS_ASSUMED_SIZE
;
15011 sym
->as
->lower
[0] = gfc_get_int_expr (gfc_default_integer_kind
, NULL
, 1);
15013 else if (sym
->ts
.type
== BT_ASSUMED
)
15015 /* TS 29113, C407a. */
15016 if (!sym
->attr
.dummy
)
15018 gfc_error ("Assumed type of variable %s at %L is only permitted "
15019 "for dummy variables", sym
->name
, &sym
->declared_at
);
15022 if (sym
->attr
.allocatable
|| sym
->attr
.codimension
15023 || sym
->attr
.pointer
|| sym
->attr
.value
)
15025 gfc_error ("Assumed-type variable %s at %L may not have the "
15026 "ALLOCATABLE, CODIMENSION, POINTER or VALUE attribute",
15027 sym
->name
, &sym
->declared_at
);
15030 if (sym
->attr
.intent
== INTENT_OUT
)
15032 gfc_error ("Assumed-type variable %s at %L may not have the "
15033 "INTENT(OUT) attribute",
15034 sym
->name
, &sym
->declared_at
);
15037 if (sym
->attr
.dimension
&& sym
->as
->type
== AS_EXPLICIT
)
15039 gfc_error ("Assumed-type variable %s at %L shall not be an "
15040 "explicit-shape array", sym
->name
, &sym
->declared_at
);
15045 /* If the symbol is marked as bind(c), that it is declared at module level
15046 scope and verify its type and kind. Do not do the latter for symbols
15047 that are implicitly typed because that is handled in
15048 gfc_set_default_type. Handle dummy arguments and procedure definitions
15049 separately. Also, anything that is use associated is not handled here
15050 but instead is handled in the module it is declared in. Finally, derived
15051 type definitions are allowed to be BIND(C) since that only implies that
15052 they're interoperable, and they are checked fully for interoperability
15053 when a variable is declared of that type. */
15054 if (sym
->attr
.is_bind_c
&& sym
->attr
.use_assoc
== 0
15055 && sym
->attr
.dummy
== 0 && sym
->attr
.flavor
!= FL_PROCEDURE
15056 && sym
->attr
.flavor
!= FL_DERIVED
)
15060 /* First, make sure the variable is declared at the
15061 module-level scope (J3/04-007, Section 15.3). */
15062 if (sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
&&
15063 sym
->attr
.in_common
== 0)
15065 gfc_error ("Variable %qs at %L cannot be BIND(C) because it "
15066 "is neither a COMMON block nor declared at the "
15067 "module level scope", sym
->name
, &(sym
->declared_at
));
15070 else if (sym
->ts
.type
== BT_CHARACTER
15071 && (sym
->ts
.u
.cl
== NULL
|| sym
->ts
.u
.cl
->length
== NULL
15072 || !gfc_is_constant_expr (sym
->ts
.u
.cl
->length
)
15073 || mpz_cmp_si (sym
->ts
.u
.cl
->length
->value
.integer
, 1) != 0))
15075 gfc_error ("BIND(C) Variable %qs at %L must have length one",
15076 sym
->name
, &sym
->declared_at
);
15079 else if (sym
->common_head
!= NULL
&& sym
->attr
.implicit_type
== 0)
15081 t
= verify_com_block_vars_c_interop (sym
->common_head
);
15083 else if (sym
->attr
.implicit_type
== 0)
15085 /* If type() declaration, we need to verify that the components
15086 of the given type are all C interoperable, etc. */
15087 if (sym
->ts
.type
== BT_DERIVED
&&
15088 sym
->ts
.u
.derived
->attr
.is_c_interop
!= 1)
15090 /* Make sure the user marked the derived type as BIND(C). If
15091 not, call the verify routine. This could print an error
15092 for the derived type more than once if multiple variables
15093 of that type are declared. */
15094 if (sym
->ts
.u
.derived
->attr
.is_bind_c
!= 1)
15095 verify_bind_c_derived_type (sym
->ts
.u
.derived
);
15099 /* Verify the variable itself as C interoperable if it
15100 is BIND(C). It is not possible for this to succeed if
15101 the verify_bind_c_derived_type failed, so don't have to handle
15102 any error returned by verify_bind_c_derived_type. */
15103 t
= verify_bind_c_sym (sym
, &(sym
->ts
), sym
->attr
.in_common
,
15104 sym
->common_block
);
15109 /* clear the is_bind_c flag to prevent reporting errors more than
15110 once if something failed. */
15111 sym
->attr
.is_bind_c
= 0;
15116 /* If a derived type symbol has reached this point, without its
15117 type being declared, we have an error. Notice that most
15118 conditions that produce undefined derived types have already
15119 been dealt with. However, the likes of:
15120 implicit type(t) (t) ..... call foo (t) will get us here if
15121 the type is not declared in the scope of the implicit
15122 statement. Change the type to BT_UNKNOWN, both because it is so
15123 and to prevent an ICE. */
15124 if (sym
->ts
.type
== BT_DERIVED
&& !sym
->attr
.is_iso_c
15125 && sym
->ts
.u
.derived
->components
== NULL
15126 && !sym
->ts
.u
.derived
->attr
.zero_comp
)
15128 gfc_error ("The derived type %qs at %L is of type %qs, "
15129 "which has not been defined", sym
->name
,
15130 &sym
->declared_at
, sym
->ts
.u
.derived
->name
);
15131 sym
->ts
.type
= BT_UNKNOWN
;
15135 /* Make sure that the derived type has been resolved and that the
15136 derived type is visible in the symbol's namespace, if it is a
15137 module function and is not PRIVATE. */
15138 if (sym
->ts
.type
== BT_DERIVED
15139 && sym
->ts
.u
.derived
->attr
.use_assoc
15140 && sym
->ns
->proc_name
15141 && sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
15142 && !resolve_fl_derived (sym
->ts
.u
.derived
))
15145 /* Unless the derived-type declaration is use associated, Fortran 95
15146 does not allow public entries of private derived types.
15147 See 4.4.1 (F95) and 4.5.1.1 (F2003); and related interpretation
15148 161 in 95-006r3. */
15149 if (sym
->ts
.type
== BT_DERIVED
15150 && sym
->ns
->proc_name
&& sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
15151 && !sym
->ts
.u
.derived
->attr
.use_assoc
15152 && gfc_check_symbol_access (sym
)
15153 && !gfc_check_symbol_access (sym
->ts
.u
.derived
)
15154 && !gfc_notify_std (GFC_STD_F2003
, "PUBLIC %s %qs at %L of PRIVATE "
15155 "derived type %qs",
15156 (sym
->attr
.flavor
== FL_PARAMETER
)
15157 ? "parameter" : "variable",
15158 sym
->name
, &sym
->declared_at
,
15159 sym
->ts
.u
.derived
->name
))
15162 /* F2008, C1302. */
15163 if (sym
->ts
.type
== BT_DERIVED
15164 && ((sym
->ts
.u
.derived
->from_intmod
== INTMOD_ISO_FORTRAN_ENV
15165 && sym
->ts
.u
.derived
->intmod_sym_id
== ISOFORTRAN_LOCK_TYPE
)
15166 || sym
->ts
.u
.derived
->attr
.lock_comp
)
15167 && !sym
->attr
.codimension
&& !sym
->ts
.u
.derived
->attr
.coarray_comp
)
15169 gfc_error ("Variable %s at %L of type LOCK_TYPE or with subcomponent of "
15170 "type LOCK_TYPE must be a coarray", sym
->name
,
15171 &sym
->declared_at
);
15175 /* TS18508, C702/C703. */
15176 if (sym
->ts
.type
== BT_DERIVED
15177 && ((sym
->ts
.u
.derived
->from_intmod
== INTMOD_ISO_FORTRAN_ENV
15178 && sym
->ts
.u
.derived
->intmod_sym_id
== ISOFORTRAN_EVENT_TYPE
)
15179 || sym
->ts
.u
.derived
->attr
.event_comp
)
15180 && !sym
->attr
.codimension
&& !sym
->ts
.u
.derived
->attr
.coarray_comp
)
15182 gfc_error ("Variable %s at %L of type EVENT_TYPE or with subcomponent of "
15183 "type EVENT_TYPE must be a coarray", sym
->name
,
15184 &sym
->declared_at
);
15188 /* An assumed-size array with INTENT(OUT) shall not be of a type for which
15189 default initialization is defined (5.1.2.4.4). */
15190 if (sym
->ts
.type
== BT_DERIVED
15192 && sym
->attr
.intent
== INTENT_OUT
15194 && sym
->as
->type
== AS_ASSUMED_SIZE
)
15196 for (c
= sym
->ts
.u
.derived
->components
; c
; c
= c
->next
)
15198 if (c
->initializer
)
15200 gfc_error ("The INTENT(OUT) dummy argument %qs at %L is "
15201 "ASSUMED SIZE and so cannot have a default initializer",
15202 sym
->name
, &sym
->declared_at
);
15209 if (sym
->ts
.type
== BT_DERIVED
&& sym
->attr
.dummy
15210 && sym
->attr
.intent
== INTENT_OUT
&& sym
->attr
.lock_comp
)
15212 gfc_error ("Dummy argument %qs at %L of LOCK_TYPE shall not be "
15213 "INTENT(OUT)", sym
->name
, &sym
->declared_at
);
15218 if (sym
->ts
.type
== BT_DERIVED
&& sym
->attr
.dummy
15219 && sym
->attr
.intent
== INTENT_OUT
&& sym
->attr
.event_comp
)
15221 gfc_error ("Dummy argument %qs at %L of EVENT_TYPE shall not be "
15222 "INTENT(OUT)", sym
->name
, &sym
->declared_at
);
15227 if ((((sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
->attr
.coarray_comp
)
15228 || (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
15229 && CLASS_DATA (sym
)->attr
.coarray_comp
))
15230 || class_attr
.codimension
)
15231 && (sym
->attr
.result
|| sym
->result
== sym
))
15233 gfc_error ("Function result %qs at %L shall not be a coarray or have "
15234 "a coarray component", sym
->name
, &sym
->declared_at
);
15239 if (sym
->attr
.codimension
&& sym
->ts
.type
== BT_DERIVED
15240 && sym
->ts
.u
.derived
->ts
.is_iso_c
)
15242 gfc_error ("Variable %qs at %L of TYPE(C_PTR) or TYPE(C_FUNPTR) "
15243 "shall not be a coarray", sym
->name
, &sym
->declared_at
);
15248 if (((sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
->attr
.coarray_comp
)
15249 || (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
15250 && CLASS_DATA (sym
)->attr
.coarray_comp
))
15251 && (class_attr
.codimension
|| class_attr
.pointer
|| class_attr
.dimension
15252 || class_attr
.allocatable
))
15254 gfc_error ("Variable %qs at %L with coarray component shall be a "
15255 "nonpointer, nonallocatable scalar, which is not a coarray",
15256 sym
->name
, &sym
->declared_at
);
15260 /* F2008, C526. The function-result case was handled above. */
15261 if (class_attr
.codimension
15262 && !(class_attr
.allocatable
|| sym
->attr
.dummy
|| sym
->attr
.save
15263 || sym
->attr
.select_type_temporary
15264 || sym
->attr
.associate_var
15265 || (sym
->ns
->save_all
&& !sym
->attr
.automatic
)
15266 || sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
15267 || sym
->ns
->proc_name
->attr
.is_main_program
15268 || sym
->attr
.function
|| sym
->attr
.result
|| sym
->attr
.use_assoc
))
15270 gfc_error ("Variable %qs at %L is a coarray and is not ALLOCATABLE, SAVE "
15271 "nor a dummy argument", sym
->name
, &sym
->declared_at
);
15275 else if (class_attr
.codimension
&& !sym
->attr
.select_type_temporary
15276 && !class_attr
.allocatable
&& as
&& as
->cotype
== AS_DEFERRED
)
15278 gfc_error ("Coarray variable %qs at %L shall not have codimensions with "
15279 "deferred shape", sym
->name
, &sym
->declared_at
);
15282 else if (class_attr
.codimension
&& class_attr
.allocatable
&& as
15283 && (as
->cotype
!= AS_DEFERRED
|| as
->type
!= AS_DEFERRED
))
15285 gfc_error ("Allocatable coarray variable %qs at %L must have "
15286 "deferred shape", sym
->name
, &sym
->declared_at
);
15291 if ((((sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
->attr
.coarray_comp
)
15292 || (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
15293 && CLASS_DATA (sym
)->attr
.coarray_comp
))
15294 || (class_attr
.codimension
&& class_attr
.allocatable
))
15295 && sym
->attr
.dummy
&& sym
->attr
.intent
== INTENT_OUT
)
15297 gfc_error ("Variable %qs at %L is INTENT(OUT) and can thus not be an "
15298 "allocatable coarray or have coarray components",
15299 sym
->name
, &sym
->declared_at
);
15303 if (class_attr
.codimension
&& sym
->attr
.dummy
15304 && sym
->ns
->proc_name
&& sym
->ns
->proc_name
->attr
.is_bind_c
)
15306 gfc_error ("Coarray dummy variable %qs at %L not allowed in BIND(C) "
15307 "procedure %qs", sym
->name
, &sym
->declared_at
,
15308 sym
->ns
->proc_name
->name
);
15312 if (sym
->ts
.type
== BT_LOGICAL
15313 && ((sym
->attr
.function
&& sym
->attr
.is_bind_c
&& sym
->result
== sym
)
15314 || ((sym
->attr
.dummy
|| sym
->attr
.result
) && sym
->ns
->proc_name
15315 && sym
->ns
->proc_name
->attr
.is_bind_c
)))
15318 for (i
= 0; gfc_logical_kinds
[i
].kind
; i
++)
15319 if (gfc_logical_kinds
[i
].kind
== sym
->ts
.kind
)
15321 if (!gfc_logical_kinds
[i
].c_bool
&& sym
->attr
.dummy
15322 && !gfc_notify_std (GFC_STD_GNU
, "LOGICAL dummy argument %qs at "
15323 "%L with non-C_Bool kind in BIND(C) procedure "
15324 "%qs", sym
->name
, &sym
->declared_at
,
15325 sym
->ns
->proc_name
->name
))
15327 else if (!gfc_logical_kinds
[i
].c_bool
15328 && !gfc_notify_std (GFC_STD_GNU
, "LOGICAL result variable "
15329 "%qs at %L with non-C_Bool kind in "
15330 "BIND(C) procedure %qs", sym
->name
,
15332 sym
->attr
.function
? sym
->name
15333 : sym
->ns
->proc_name
->name
))
15337 switch (sym
->attr
.flavor
)
15340 if (!resolve_fl_variable (sym
, mp_flag
))
15345 if (sym
->formal
&& !sym
->formal_ns
)
15347 /* Check that none of the arguments are a namelist. */
15348 gfc_formal_arglist
*formal
= sym
->formal
;
15350 for (; formal
; formal
= formal
->next
)
15351 if (formal
->sym
&& formal
->sym
->attr
.flavor
== FL_NAMELIST
)
15353 gfc_error ("Namelist %qs cannot be an argument to "
15354 "subroutine or function at %L",
15355 formal
->sym
->name
, &sym
->declared_at
);
15360 if (!resolve_fl_procedure (sym
, mp_flag
))
15365 if (!resolve_fl_namelist (sym
))
15370 if (!resolve_fl_parameter (sym
))
15378 /* Resolve array specifier. Check as well some constraints
15379 on COMMON blocks. */
15381 check_constant
= sym
->attr
.in_common
&& !sym
->attr
.pointer
;
15383 /* Set the formal_arg_flag so that check_conflict will not throw
15384 an error for host associated variables in the specification
15385 expression for an array_valued function. */
15386 if ((sym
->attr
.function
|| sym
->attr
.result
) && sym
->as
)
15387 formal_arg_flag
= true;
15389 saved_specification_expr
= specification_expr
;
15390 specification_expr
= true;
15391 gfc_resolve_array_spec (sym
->as
, check_constant
);
15392 specification_expr
= saved_specification_expr
;
15394 formal_arg_flag
= false;
15396 /* Resolve formal namespaces. */
15397 if (sym
->formal_ns
&& sym
->formal_ns
!= gfc_current_ns
15398 && !sym
->attr
.contained
&& !sym
->attr
.intrinsic
)
15399 gfc_resolve (sym
->formal_ns
);
15401 /* Make sure the formal namespace is present. */
15402 if (sym
->formal
&& !sym
->formal_ns
)
15404 gfc_formal_arglist
*formal
= sym
->formal
;
15405 while (formal
&& !formal
->sym
)
15406 formal
= formal
->next
;
15410 sym
->formal_ns
= formal
->sym
->ns
;
15411 if (sym
->ns
!= formal
->sym
->ns
)
15412 sym
->formal_ns
->refs
++;
15416 /* Check threadprivate restrictions. */
15417 if (sym
->attr
.threadprivate
&& !sym
->attr
.save
15418 && !(sym
->ns
->save_all
&& !sym
->attr
.automatic
)
15419 && (!sym
->attr
.in_common
15420 && sym
->module
== NULL
15421 && (sym
->ns
->proc_name
== NULL
15422 || sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
)))
15423 gfc_error ("Threadprivate at %L isn't SAVEd", &sym
->declared_at
);
15425 /* Check omp declare target restrictions. */
15426 if (sym
->attr
.omp_declare_target
15427 && sym
->attr
.flavor
== FL_VARIABLE
15429 && !(sym
->ns
->save_all
&& !sym
->attr
.automatic
)
15430 && (!sym
->attr
.in_common
15431 && sym
->module
== NULL
15432 && (sym
->ns
->proc_name
== NULL
15433 || sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
)))
15434 gfc_error ("!$OMP DECLARE TARGET variable %qs at %L isn't SAVEd",
15435 sym
->name
, &sym
->declared_at
);
15437 /* If we have come this far we can apply default-initializers, as
15438 described in 14.7.5, to those variables that have not already
15439 been assigned one. */
15440 if (sym
->ts
.type
== BT_DERIVED
15442 && !sym
->attr
.allocatable
15443 && !sym
->attr
.alloc_comp
)
15445 symbol_attribute
*a
= &sym
->attr
;
15447 if ((!a
->save
&& !a
->dummy
&& !a
->pointer
15448 && !a
->in_common
&& !a
->use_assoc
15450 && !((a
->function
|| a
->result
)
15452 || sym
->ts
.u
.derived
->attr
.alloc_comp
15453 || sym
->ts
.u
.derived
->attr
.pointer_comp
))
15454 && !(a
->function
&& sym
!= sym
->result
))
15455 || (a
->dummy
&& a
->intent
== INTENT_OUT
&& !a
->pointer
))
15456 apply_default_init (sym
);
15457 else if (a
->function
&& sym
->result
&& a
->access
!= ACCESS_PRIVATE
15458 && (sym
->ts
.u
.derived
->attr
.alloc_comp
15459 || sym
->ts
.u
.derived
->attr
.pointer_comp
))
15460 /* Mark the result symbol to be referenced, when it has allocatable
15462 sym
->result
->attr
.referenced
= 1;
15465 if (sym
->ts
.type
== BT_CLASS
&& sym
->ns
== gfc_current_ns
15466 && sym
->attr
.dummy
&& sym
->attr
.intent
== INTENT_OUT
15467 && !CLASS_DATA (sym
)->attr
.class_pointer
15468 && !CLASS_DATA (sym
)->attr
.allocatable
)
15469 apply_default_init (sym
);
15471 /* If this symbol has a type-spec, check it. */
15472 if (sym
->attr
.flavor
== FL_VARIABLE
|| sym
->attr
.flavor
== FL_PARAMETER
15473 || (sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.function
))
15474 if (!resolve_typespec_used (&sym
->ts
, &sym
->declared_at
, sym
->name
))
15477 if (sym
->param_list
)
15482 /************* Resolve DATA statements *************/
15486 gfc_data_value
*vnode
;
15492 /* Advance the values structure to point to the next value in the data list. */
15495 next_data_value (void)
15497 while (mpz_cmp_ui (values
.left
, 0) == 0)
15500 if (values
.vnode
->next
== NULL
)
15503 values
.vnode
= values
.vnode
->next
;
15504 mpz_set (values
.left
, values
.vnode
->repeat
);
15512 check_data_variable (gfc_data_variable
*var
, locus
*where
)
15518 ar_type mark
= AR_UNKNOWN
;
15520 mpz_t section_index
[GFC_MAX_DIMENSIONS
];
15526 if (!gfc_resolve_expr (var
->expr
))
15530 mpz_init_set_si (offset
, 0);
15533 if (e
->expr_type
== EXPR_FUNCTION
&& e
->value
.function
.isym
15534 && e
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
)
15535 e
= e
->value
.function
.actual
->expr
;
15537 if (e
->expr_type
!= EXPR_VARIABLE
)
15539 gfc_error ("Expecting definable entity near %L", where
);
15543 sym
= e
->symtree
->n
.sym
;
15545 if (sym
->ns
->is_block_data
&& !sym
->attr
.in_common
)
15547 gfc_error ("BLOCK DATA element %qs at %L must be in COMMON",
15548 sym
->name
, &sym
->declared_at
);
15552 if (e
->ref
== NULL
&& sym
->as
)
15554 gfc_error ("DATA array %qs at %L must be specified in a previous"
15555 " declaration", sym
->name
, where
);
15559 has_pointer
= sym
->attr
.pointer
;
15561 if (gfc_is_coindexed (e
))
15563 gfc_error ("DATA element %qs at %L cannot have a coindex", sym
->name
,
15568 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
15570 if (ref
->type
== REF_COMPONENT
&& ref
->u
.c
.component
->attr
.pointer
)
15574 && ref
->type
== REF_ARRAY
15575 && ref
->u
.ar
.type
!= AR_FULL
)
15577 gfc_error ("DATA element %qs at %L is a pointer and so must "
15578 "be a full array", sym
->name
, where
);
15583 if (e
->rank
== 0 || has_pointer
)
15585 mpz_init_set_ui (size
, 1);
15592 /* Find the array section reference. */
15593 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
15595 if (ref
->type
!= REF_ARRAY
)
15597 if (ref
->u
.ar
.type
== AR_ELEMENT
)
15603 /* Set marks according to the reference pattern. */
15604 switch (ref
->u
.ar
.type
)
15612 /* Get the start position of array section. */
15613 gfc_get_section_index (ar
, section_index
, &offset
);
15618 gcc_unreachable ();
15621 if (!gfc_array_size (e
, &size
))
15623 gfc_error ("Nonconstant array section at %L in DATA statement",
15625 mpz_clear (offset
);
15632 while (mpz_cmp_ui (size
, 0) > 0)
15634 if (!next_data_value ())
15636 gfc_error ("DATA statement at %L has more variables than values",
15642 t
= gfc_check_assign (var
->expr
, values
.vnode
->expr
, 0);
15646 /* If we have more than one element left in the repeat count,
15647 and we have more than one element left in the target variable,
15648 then create a range assignment. */
15649 /* FIXME: Only done for full arrays for now, since array sections
15651 if (mark
== AR_FULL
&& ref
&& ref
->next
== NULL
15652 && mpz_cmp_ui (values
.left
, 1) > 0 && mpz_cmp_ui (size
, 1) > 0)
15656 if (mpz_cmp (size
, values
.left
) >= 0)
15658 mpz_init_set (range
, values
.left
);
15659 mpz_sub (size
, size
, values
.left
);
15660 mpz_set_ui (values
.left
, 0);
15664 mpz_init_set (range
, size
);
15665 mpz_sub (values
.left
, values
.left
, size
);
15666 mpz_set_ui (size
, 0);
15669 t
= gfc_assign_data_value (var
->expr
, values
.vnode
->expr
,
15672 mpz_add (offset
, offset
, range
);
15679 /* Assign initial value to symbol. */
15682 mpz_sub_ui (values
.left
, values
.left
, 1);
15683 mpz_sub_ui (size
, size
, 1);
15685 t
= gfc_assign_data_value (var
->expr
, values
.vnode
->expr
,
15690 if (mark
== AR_FULL
)
15691 mpz_add_ui (offset
, offset
, 1);
15693 /* Modify the array section indexes and recalculate the offset
15694 for next element. */
15695 else if (mark
== AR_SECTION
)
15696 gfc_advance_section (section_index
, ar
, &offset
);
15700 if (mark
== AR_SECTION
)
15702 for (i
= 0; i
< ar
->dimen
; i
++)
15703 mpz_clear (section_index
[i
]);
15707 mpz_clear (offset
);
15713 static bool traverse_data_var (gfc_data_variable
*, locus
*);
15715 /* Iterate over a list of elements in a DATA statement. */
15718 traverse_data_list (gfc_data_variable
*var
, locus
*where
)
15721 iterator_stack frame
;
15722 gfc_expr
*e
, *start
, *end
, *step
;
15723 bool retval
= true;
15725 mpz_init (frame
.value
);
15728 start
= gfc_copy_expr (var
->iter
.start
);
15729 end
= gfc_copy_expr (var
->iter
.end
);
15730 step
= gfc_copy_expr (var
->iter
.step
);
15732 if (!gfc_simplify_expr (start
, 1)
15733 || start
->expr_type
!= EXPR_CONSTANT
)
15735 gfc_error ("start of implied-do loop at %L could not be "
15736 "simplified to a constant value", &start
->where
);
15740 if (!gfc_simplify_expr (end
, 1)
15741 || end
->expr_type
!= EXPR_CONSTANT
)
15743 gfc_error ("end of implied-do loop at %L could not be "
15744 "simplified to a constant value", &start
->where
);
15748 if (!gfc_simplify_expr (step
, 1)
15749 || step
->expr_type
!= EXPR_CONSTANT
)
15751 gfc_error ("step of implied-do loop at %L could not be "
15752 "simplified to a constant value", &start
->where
);
15757 mpz_set (trip
, end
->value
.integer
);
15758 mpz_sub (trip
, trip
, start
->value
.integer
);
15759 mpz_add (trip
, trip
, step
->value
.integer
);
15761 mpz_div (trip
, trip
, step
->value
.integer
);
15763 mpz_set (frame
.value
, start
->value
.integer
);
15765 frame
.prev
= iter_stack
;
15766 frame
.variable
= var
->iter
.var
->symtree
;
15767 iter_stack
= &frame
;
15769 while (mpz_cmp_ui (trip
, 0) > 0)
15771 if (!traverse_data_var (var
->list
, where
))
15777 e
= gfc_copy_expr (var
->expr
);
15778 if (!gfc_simplify_expr (e
, 1))
15785 mpz_add (frame
.value
, frame
.value
, step
->value
.integer
);
15787 mpz_sub_ui (trip
, trip
, 1);
15791 mpz_clear (frame
.value
);
15794 gfc_free_expr (start
);
15795 gfc_free_expr (end
);
15796 gfc_free_expr (step
);
15798 iter_stack
= frame
.prev
;
15803 /* Type resolve variables in the variable list of a DATA statement. */
15806 traverse_data_var (gfc_data_variable
*var
, locus
*where
)
15810 for (; var
; var
= var
->next
)
15812 if (var
->expr
== NULL
)
15813 t
= traverse_data_list (var
, where
);
15815 t
= check_data_variable (var
, where
);
15825 /* Resolve the expressions and iterators associated with a data statement.
15826 This is separate from the assignment checking because data lists should
15827 only be resolved once. */
15830 resolve_data_variables (gfc_data_variable
*d
)
15832 for (; d
; d
= d
->next
)
15834 if (d
->list
== NULL
)
15836 if (!gfc_resolve_expr (d
->expr
))
15841 if (!gfc_resolve_iterator (&d
->iter
, false, true))
15844 if (!resolve_data_variables (d
->list
))
15853 /* Resolve a single DATA statement. We implement this by storing a pointer to
15854 the value list into static variables, and then recursively traversing the
15855 variables list, expanding iterators and such. */
15858 resolve_data (gfc_data
*d
)
15861 if (!resolve_data_variables (d
->var
))
15864 values
.vnode
= d
->value
;
15865 if (d
->value
== NULL
)
15866 mpz_set_ui (values
.left
, 0);
15868 mpz_set (values
.left
, d
->value
->repeat
);
15870 if (!traverse_data_var (d
->var
, &d
->where
))
15873 /* At this point, we better not have any values left. */
15875 if (next_data_value ())
15876 gfc_error ("DATA statement at %L has more values than variables",
15881 /* 12.6 Constraint: In a pure subprogram any variable which is in common or
15882 accessed by host or use association, is a dummy argument to a pure function,
15883 is a dummy argument with INTENT (IN) to a pure subroutine, or an object that
15884 is storage associated with any such variable, shall not be used in the
15885 following contexts: (clients of this function). */
15887 /* Determines if a variable is not 'pure', i.e., not assignable within a pure
15888 procedure. Returns zero if assignment is OK, nonzero if there is a
15891 gfc_impure_variable (gfc_symbol
*sym
)
15896 if (sym
->attr
.use_assoc
|| sym
->attr
.in_common
)
15899 /* Check if the symbol's ns is inside the pure procedure. */
15900 for (ns
= gfc_current_ns
; ns
; ns
= ns
->parent
)
15904 if (ns
->proc_name
->attr
.flavor
== FL_PROCEDURE
&& !sym
->attr
.function
)
15908 proc
= sym
->ns
->proc_name
;
15909 if (sym
->attr
.dummy
15910 && ((proc
->attr
.subroutine
&& sym
->attr
.intent
== INTENT_IN
)
15911 || proc
->attr
.function
))
15914 /* TODO: Sort out what can be storage associated, if anything, and include
15915 it here. In principle equivalences should be scanned but it does not
15916 seem to be possible to storage associate an impure variable this way. */
15921 /* Test whether a symbol is pure or not. For a NULL pointer, checks if the
15922 current namespace is inside a pure procedure. */
15925 gfc_pure (gfc_symbol
*sym
)
15927 symbol_attribute attr
;
15932 /* Check if the current namespace or one of its parents
15933 belongs to a pure procedure. */
15934 for (ns
= gfc_current_ns
; ns
; ns
= ns
->parent
)
15936 sym
= ns
->proc_name
;
15940 if (attr
.flavor
== FL_PROCEDURE
&& attr
.pure
)
15948 return attr
.flavor
== FL_PROCEDURE
&& attr
.pure
;
15952 /* Test whether a symbol is implicitly pure or not. For a NULL pointer,
15953 checks if the current namespace is implicitly pure. Note that this
15954 function returns false for a PURE procedure. */
15957 gfc_implicit_pure (gfc_symbol
*sym
)
15963 /* Check if the current procedure is implicit_pure. Walk up
15964 the procedure list until we find a procedure. */
15965 for (ns
= gfc_current_ns
; ns
; ns
= ns
->parent
)
15967 sym
= ns
->proc_name
;
15971 if (sym
->attr
.flavor
== FL_PROCEDURE
)
15976 return sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.implicit_pure
15977 && !sym
->attr
.pure
;
15982 gfc_unset_implicit_pure (gfc_symbol
*sym
)
15988 /* Check if the current procedure is implicit_pure. Walk up
15989 the procedure list until we find a procedure. */
15990 for (ns
= gfc_current_ns
; ns
; ns
= ns
->parent
)
15992 sym
= ns
->proc_name
;
15996 if (sym
->attr
.flavor
== FL_PROCEDURE
)
16001 if (sym
->attr
.flavor
== FL_PROCEDURE
)
16002 sym
->attr
.implicit_pure
= 0;
16004 sym
->attr
.pure
= 0;
16008 /* Test whether the current procedure is elemental or not. */
16011 gfc_elemental (gfc_symbol
*sym
)
16013 symbol_attribute attr
;
16016 sym
= gfc_current_ns
->proc_name
;
16021 return attr
.flavor
== FL_PROCEDURE
&& attr
.elemental
;
16025 /* Warn about unused labels. */
16028 warn_unused_fortran_label (gfc_st_label
*label
)
16033 warn_unused_fortran_label (label
->left
);
16035 if (label
->defined
== ST_LABEL_UNKNOWN
)
16038 switch (label
->referenced
)
16040 case ST_LABEL_UNKNOWN
:
16041 gfc_warning (OPT_Wunused_label
, "Label %d at %L defined but not used",
16042 label
->value
, &label
->where
);
16045 case ST_LABEL_BAD_TARGET
:
16046 gfc_warning (OPT_Wunused_label
,
16047 "Label %d at %L defined but cannot be used",
16048 label
->value
, &label
->where
);
16055 warn_unused_fortran_label (label
->right
);
16059 /* Returns the sequence type of a symbol or sequence. */
16062 sequence_type (gfc_typespec ts
)
16071 if (ts
.u
.derived
->components
== NULL
)
16072 return SEQ_NONDEFAULT
;
16074 result
= sequence_type (ts
.u
.derived
->components
->ts
);
16075 for (c
= ts
.u
.derived
->components
->next
; c
; c
= c
->next
)
16076 if (sequence_type (c
->ts
) != result
)
16082 if (ts
.kind
!= gfc_default_character_kind
)
16083 return SEQ_NONDEFAULT
;
16085 return SEQ_CHARACTER
;
16088 if (ts
.kind
!= gfc_default_integer_kind
)
16089 return SEQ_NONDEFAULT
;
16091 return SEQ_NUMERIC
;
16094 if (!(ts
.kind
== gfc_default_real_kind
16095 || ts
.kind
== gfc_default_double_kind
))
16096 return SEQ_NONDEFAULT
;
16098 return SEQ_NUMERIC
;
16101 if (ts
.kind
!= gfc_default_complex_kind
)
16102 return SEQ_NONDEFAULT
;
16104 return SEQ_NUMERIC
;
16107 if (ts
.kind
!= gfc_default_logical_kind
)
16108 return SEQ_NONDEFAULT
;
16110 return SEQ_NUMERIC
;
16113 return SEQ_NONDEFAULT
;
16118 /* Resolve derived type EQUIVALENCE object. */
16121 resolve_equivalence_derived (gfc_symbol
*derived
, gfc_symbol
*sym
, gfc_expr
*e
)
16123 gfc_component
*c
= derived
->components
;
16128 /* Shall not be an object of nonsequence derived type. */
16129 if (!derived
->attr
.sequence
)
16131 gfc_error ("Derived type variable %qs at %L must have SEQUENCE "
16132 "attribute to be an EQUIVALENCE object", sym
->name
,
16137 /* Shall not have allocatable components. */
16138 if (derived
->attr
.alloc_comp
)
16140 gfc_error ("Derived type variable %qs at %L cannot have ALLOCATABLE "
16141 "components to be an EQUIVALENCE object",sym
->name
,
16146 if (sym
->attr
.in_common
&& gfc_has_default_initializer (sym
->ts
.u
.derived
))
16148 gfc_error ("Derived type variable %qs at %L with default "
16149 "initialization cannot be in EQUIVALENCE with a variable "
16150 "in COMMON", sym
->name
, &e
->where
);
16154 for (; c
; c
= c
->next
)
16156 if (gfc_bt_struct (c
->ts
.type
)
16157 && (!resolve_equivalence_derived(c
->ts
.u
.derived
, sym
, e
)))
16160 /* Shall not be an object of sequence derived type containing a pointer
16161 in the structure. */
16162 if (c
->attr
.pointer
)
16164 gfc_error ("Derived type variable %qs at %L with pointer "
16165 "component(s) cannot be an EQUIVALENCE object",
16166 sym
->name
, &e
->where
);
16174 /* Resolve equivalence object.
16175 An EQUIVALENCE object shall not be a dummy argument, a pointer, a target,
16176 an allocatable array, an object of nonsequence derived type, an object of
16177 sequence derived type containing a pointer at any level of component
16178 selection, an automatic object, a function name, an entry name, a result
16179 name, a named constant, a structure component, or a subobject of any of
16180 the preceding objects. A substring shall not have length zero. A
16181 derived type shall not have components with default initialization nor
16182 shall two objects of an equivalence group be initialized.
16183 Either all or none of the objects shall have an protected attribute.
16184 The simple constraints are done in symbol.c(check_conflict) and the rest
16185 are implemented here. */
16188 resolve_equivalence (gfc_equiv
*eq
)
16191 gfc_symbol
*first_sym
;
16194 locus
*last_where
= NULL
;
16195 seq_type eq_type
, last_eq_type
;
16196 gfc_typespec
*last_ts
;
16197 int object
, cnt_protected
;
16200 last_ts
= &eq
->expr
->symtree
->n
.sym
->ts
;
16202 first_sym
= eq
->expr
->symtree
->n
.sym
;
16206 for (object
= 1; eq
; eq
= eq
->eq
, object
++)
16210 e
->ts
= e
->symtree
->n
.sym
->ts
;
16211 /* match_varspec might not know yet if it is seeing
16212 array reference or substring reference, as it doesn't
16214 if (e
->ref
&& e
->ref
->type
== REF_ARRAY
)
16216 gfc_ref
*ref
= e
->ref
;
16217 sym
= e
->symtree
->n
.sym
;
16219 if (sym
->attr
.dimension
)
16221 ref
->u
.ar
.as
= sym
->as
;
16225 /* For substrings, convert REF_ARRAY into REF_SUBSTRING. */
16226 if (e
->ts
.type
== BT_CHARACTER
16228 && ref
->type
== REF_ARRAY
16229 && ref
->u
.ar
.dimen
== 1
16230 && ref
->u
.ar
.dimen_type
[0] == DIMEN_RANGE
16231 && ref
->u
.ar
.stride
[0] == NULL
)
16233 gfc_expr
*start
= ref
->u
.ar
.start
[0];
16234 gfc_expr
*end
= ref
->u
.ar
.end
[0];
16237 /* Optimize away the (:) reference. */
16238 if (start
== NULL
&& end
== NULL
)
16241 e
->ref
= ref
->next
;
16243 e
->ref
->next
= ref
->next
;
16248 ref
->type
= REF_SUBSTRING
;
16250 start
= gfc_get_int_expr (gfc_charlen_int_kind
,
16252 ref
->u
.ss
.start
= start
;
16253 if (end
== NULL
&& e
->ts
.u
.cl
)
16254 end
= gfc_copy_expr (e
->ts
.u
.cl
->length
);
16255 ref
->u
.ss
.end
= end
;
16256 ref
->u
.ss
.length
= e
->ts
.u
.cl
;
16263 /* Any further ref is an error. */
16266 gcc_assert (ref
->type
== REF_ARRAY
);
16267 gfc_error ("Syntax error in EQUIVALENCE statement at %L",
16273 if (!gfc_resolve_expr (e
))
16276 sym
= e
->symtree
->n
.sym
;
16278 if (sym
->attr
.is_protected
)
16280 if (cnt_protected
> 0 && cnt_protected
!= object
)
16282 gfc_error ("Either all or none of the objects in the "
16283 "EQUIVALENCE set at %L shall have the "
16284 "PROTECTED attribute",
16289 /* Shall not equivalence common block variables in a PURE procedure. */
16290 if (sym
->ns
->proc_name
16291 && sym
->ns
->proc_name
->attr
.pure
16292 && sym
->attr
.in_common
)
16294 /* Need to check for symbols that may have entered the pure
16295 procedure via a USE statement. */
16296 bool saw_sym
= false;
16297 if (sym
->ns
->use_stmts
)
16300 for (r
= sym
->ns
->use_stmts
->rename
; r
; r
= r
->next
)
16301 if (strcmp(r
->use_name
, sym
->name
) == 0) saw_sym
= true;
16307 gfc_error ("COMMON block member %qs at %L cannot be an "
16308 "EQUIVALENCE object in the pure procedure %qs",
16309 sym
->name
, &e
->where
, sym
->ns
->proc_name
->name
);
16313 /* Shall not be a named constant. */
16314 if (e
->expr_type
== EXPR_CONSTANT
)
16316 gfc_error ("Named constant %qs at %L cannot be an EQUIVALENCE "
16317 "object", sym
->name
, &e
->where
);
16321 if (e
->ts
.type
== BT_DERIVED
16322 && !resolve_equivalence_derived (e
->ts
.u
.derived
, sym
, e
))
16325 /* Check that the types correspond correctly:
16327 A numeric sequence structure may be equivalenced to another sequence
16328 structure, an object of default integer type, default real type, double
16329 precision real type, default logical type such that components of the
16330 structure ultimately only become associated to objects of the same
16331 kind. A character sequence structure may be equivalenced to an object
16332 of default character kind or another character sequence structure.
16333 Other objects may be equivalenced only to objects of the same type and
16334 kind parameters. */
16336 /* Identical types are unconditionally OK. */
16337 if (object
== 1 || gfc_compare_types (last_ts
, &sym
->ts
))
16338 goto identical_types
;
16340 last_eq_type
= sequence_type (*last_ts
);
16341 eq_type
= sequence_type (sym
->ts
);
16343 /* Since the pair of objects is not of the same type, mixed or
16344 non-default sequences can be rejected. */
16346 msg
= "Sequence %s with mixed components in EQUIVALENCE "
16347 "statement at %L with different type objects";
16349 && last_eq_type
== SEQ_MIXED
16350 && !gfc_notify_std (GFC_STD_GNU
, msg
, first_sym
->name
, last_where
))
16351 || (eq_type
== SEQ_MIXED
16352 && !gfc_notify_std (GFC_STD_GNU
, msg
, sym
->name
, &e
->where
)))
16355 msg
= "Non-default type object or sequence %s in EQUIVALENCE "
16356 "statement at %L with objects of different type";
16358 && last_eq_type
== SEQ_NONDEFAULT
16359 && !gfc_notify_std (GFC_STD_GNU
, msg
, first_sym
->name
, last_where
))
16360 || (eq_type
== SEQ_NONDEFAULT
16361 && !gfc_notify_std (GFC_STD_GNU
, msg
, sym
->name
, &e
->where
)))
16364 msg
="Non-CHARACTER object %qs in default CHARACTER "
16365 "EQUIVALENCE statement at %L";
16366 if (last_eq_type
== SEQ_CHARACTER
16367 && eq_type
!= SEQ_CHARACTER
16368 && !gfc_notify_std (GFC_STD_GNU
, msg
, sym
->name
, &e
->where
))
16371 msg
="Non-NUMERIC object %qs in default NUMERIC "
16372 "EQUIVALENCE statement at %L";
16373 if (last_eq_type
== SEQ_NUMERIC
16374 && eq_type
!= SEQ_NUMERIC
16375 && !gfc_notify_std (GFC_STD_GNU
, msg
, sym
->name
, &e
->where
))
16380 last_where
= &e
->where
;
16385 /* Shall not be an automatic array. */
16386 if (e
->ref
->type
== REF_ARRAY
16387 && !gfc_resolve_array_spec (e
->ref
->u
.ar
.as
, 1))
16389 gfc_error ("Array %qs at %L with non-constant bounds cannot be "
16390 "an EQUIVALENCE object", sym
->name
, &e
->where
);
16397 /* Shall not be a structure component. */
16398 if (r
->type
== REF_COMPONENT
)
16400 gfc_error ("Structure component %qs at %L cannot be an "
16401 "EQUIVALENCE object",
16402 r
->u
.c
.component
->name
, &e
->where
);
16406 /* A substring shall not have length zero. */
16407 if (r
->type
== REF_SUBSTRING
)
16409 if (compare_bound (r
->u
.ss
.start
, r
->u
.ss
.end
) == CMP_GT
)
16411 gfc_error ("Substring at %L has length zero",
16412 &r
->u
.ss
.start
->where
);
16422 /* Function called by resolve_fntype to flag other symbol used in the
16423 length type parameter specification of function resuls. */
16426 flag_fn_result_spec (gfc_expr
*expr
,
16428 int *f ATTRIBUTE_UNUSED
)
16433 if (expr
->expr_type
== EXPR_VARIABLE
)
16435 s
= expr
->symtree
->n
.sym
;
16436 for (ns
= s
->ns
; ns
; ns
= ns
->parent
)
16442 gfc_error ("Self reference in character length expression "
16443 "for %qs at %L", sym
->name
, &expr
->where
);
16447 if (!s
->fn_result_spec
16448 && s
->attr
.flavor
== FL_PARAMETER
)
16450 /* Function contained in a module.... */
16451 if (ns
->proc_name
&& ns
->proc_name
->attr
.flavor
== FL_MODULE
)
16454 s
->fn_result_spec
= 1;
16455 /* Make sure that this symbol is translated as a module
16457 st
= gfc_get_unique_symtree (ns
);
16461 /* ... which is use associated and called. */
16462 else if (s
->attr
.use_assoc
|| s
->attr
.used_in_submodule
16464 /* External function matched with an interface. */
16467 && s
->ns
->proc_name
->attr
.if_source
== IFSRC_DECL
)
16468 || s
->ns
->proc_name
->attr
.if_source
== IFSRC_IFBODY
)
16469 && s
->ns
->proc_name
->attr
.function
))
16470 s
->fn_result_spec
= 1;
16477 /* Resolve function and ENTRY types, issue diagnostics if needed. */
16480 resolve_fntype (gfc_namespace
*ns
)
16482 gfc_entry_list
*el
;
16485 if (ns
->proc_name
== NULL
|| !ns
->proc_name
->attr
.function
)
16488 /* If there are any entries, ns->proc_name is the entry master
16489 synthetic symbol and ns->entries->sym actual FUNCTION symbol. */
16491 sym
= ns
->entries
->sym
;
16493 sym
= ns
->proc_name
;
16494 if (sym
->result
== sym
16495 && sym
->ts
.type
== BT_UNKNOWN
16496 && !gfc_set_default_type (sym
, 0, NULL
)
16497 && !sym
->attr
.untyped
)
16499 gfc_error ("Function %qs at %L has no IMPLICIT type",
16500 sym
->name
, &sym
->declared_at
);
16501 sym
->attr
.untyped
= 1;
16504 if (sym
->ts
.type
== BT_DERIVED
&& !sym
->ts
.u
.derived
->attr
.use_assoc
16505 && !sym
->attr
.contained
16506 && !gfc_check_symbol_access (sym
->ts
.u
.derived
)
16507 && gfc_check_symbol_access (sym
))
16509 gfc_notify_std (GFC_STD_F2003
, "PUBLIC function %qs at "
16510 "%L of PRIVATE type %qs", sym
->name
,
16511 &sym
->declared_at
, sym
->ts
.u
.derived
->name
);
16515 for (el
= ns
->entries
->next
; el
; el
= el
->next
)
16517 if (el
->sym
->result
== el
->sym
16518 && el
->sym
->ts
.type
== BT_UNKNOWN
16519 && !gfc_set_default_type (el
->sym
, 0, NULL
)
16520 && !el
->sym
->attr
.untyped
)
16522 gfc_error ("ENTRY %qs at %L has no IMPLICIT type",
16523 el
->sym
->name
, &el
->sym
->declared_at
);
16524 el
->sym
->attr
.untyped
= 1;
16528 if (sym
->ts
.type
== BT_CHARACTER
)
16529 gfc_traverse_expr (sym
->ts
.u
.cl
->length
, sym
, flag_fn_result_spec
, 0);
16533 /* 12.3.2.1.1 Defined operators. */
16536 check_uop_procedure (gfc_symbol
*sym
, locus where
)
16538 gfc_formal_arglist
*formal
;
16540 if (!sym
->attr
.function
)
16542 gfc_error ("User operator procedure %qs at %L must be a FUNCTION",
16543 sym
->name
, &where
);
16547 if (sym
->ts
.type
== BT_CHARACTER
16548 && !((sym
->ts
.u
.cl
&& sym
->ts
.u
.cl
->length
) || sym
->ts
.deferred
)
16549 && !(sym
->result
&& ((sym
->result
->ts
.u
.cl
16550 && sym
->result
->ts
.u
.cl
->length
) || sym
->result
->ts
.deferred
)))
16552 gfc_error ("User operator procedure %qs at %L cannot be assumed "
16553 "character length", sym
->name
, &where
);
16557 formal
= gfc_sym_get_dummy_args (sym
);
16558 if (!formal
|| !formal
->sym
)
16560 gfc_error ("User operator procedure %qs at %L must have at least "
16561 "one argument", sym
->name
, &where
);
16565 if (formal
->sym
->attr
.intent
!= INTENT_IN
)
16567 gfc_error ("First argument of operator interface at %L must be "
16568 "INTENT(IN)", &where
);
16572 if (formal
->sym
->attr
.optional
)
16574 gfc_error ("First argument of operator interface at %L cannot be "
16575 "optional", &where
);
16579 formal
= formal
->next
;
16580 if (!formal
|| !formal
->sym
)
16583 if (formal
->sym
->attr
.intent
!= INTENT_IN
)
16585 gfc_error ("Second argument of operator interface at %L must be "
16586 "INTENT(IN)", &where
);
16590 if (formal
->sym
->attr
.optional
)
16592 gfc_error ("Second argument of operator interface at %L cannot be "
16593 "optional", &where
);
16599 gfc_error ("Operator interface at %L must have, at most, two "
16600 "arguments", &where
);
16608 gfc_resolve_uops (gfc_symtree
*symtree
)
16610 gfc_interface
*itr
;
16612 if (symtree
== NULL
)
16615 gfc_resolve_uops (symtree
->left
);
16616 gfc_resolve_uops (symtree
->right
);
16618 for (itr
= symtree
->n
.uop
->op
; itr
; itr
= itr
->next
)
16619 check_uop_procedure (itr
->sym
, itr
->sym
->declared_at
);
16623 /* Examine all of the expressions associated with a program unit,
16624 assign types to all intermediate expressions, make sure that all
16625 assignments are to compatible types and figure out which names
16626 refer to which functions or subroutines. It doesn't check code
16627 block, which is handled by gfc_resolve_code. */
16630 resolve_types (gfc_namespace
*ns
)
16636 gfc_namespace
* old_ns
= gfc_current_ns
;
16638 if (ns
->types_resolved
)
16641 /* Check that all IMPLICIT types are ok. */
16642 if (!ns
->seen_implicit_none
)
16645 for (letter
= 0; letter
!= GFC_LETTERS
; ++letter
)
16646 if (ns
->set_flag
[letter
]
16647 && !resolve_typespec_used (&ns
->default_type
[letter
],
16648 &ns
->implicit_loc
[letter
], NULL
))
16652 gfc_current_ns
= ns
;
16654 resolve_entries (ns
);
16656 resolve_common_vars (&ns
->blank_common
, false);
16657 resolve_common_blocks (ns
->common_root
);
16659 resolve_contained_functions (ns
);
16661 if (ns
->proc_name
&& ns
->proc_name
->attr
.flavor
== FL_PROCEDURE
16662 && ns
->proc_name
->attr
.if_source
== IFSRC_IFBODY
)
16663 resolve_formal_arglist (ns
->proc_name
);
16665 gfc_traverse_ns (ns
, resolve_bind_c_derived_types
);
16667 for (cl
= ns
->cl_list
; cl
; cl
= cl
->next
)
16668 resolve_charlen (cl
);
16670 gfc_traverse_ns (ns
, resolve_symbol
);
16672 resolve_fntype (ns
);
16674 for (n
= ns
->contained
; n
; n
= n
->sibling
)
16676 if (gfc_pure (ns
->proc_name
) && !gfc_pure (n
->proc_name
))
16677 gfc_error ("Contained procedure %qs at %L of a PURE procedure must "
16678 "also be PURE", n
->proc_name
->name
,
16679 &n
->proc_name
->declared_at
);
16685 gfc_do_concurrent_flag
= 0;
16686 gfc_check_interfaces (ns
);
16688 gfc_traverse_ns (ns
, resolve_values
);
16690 if (ns
->save_all
|| !flag_automatic
)
16694 for (d
= ns
->data
; d
; d
= d
->next
)
16698 gfc_traverse_ns (ns
, gfc_formalize_init_value
);
16700 gfc_traverse_ns (ns
, gfc_verify_binding_labels
);
16702 for (eq
= ns
->equiv
; eq
; eq
= eq
->next
)
16703 resolve_equivalence (eq
);
16705 /* Warn about unused labels. */
16706 if (warn_unused_label
)
16707 warn_unused_fortran_label (ns
->st_labels
);
16709 gfc_resolve_uops (ns
->uop_root
);
16711 gfc_traverse_ns (ns
, gfc_verify_DTIO_procedures
);
16713 gfc_resolve_omp_declare_simd (ns
);
16715 gfc_resolve_omp_udrs (ns
->omp_udr_root
);
16717 ns
->types_resolved
= 1;
16719 gfc_current_ns
= old_ns
;
16723 /* Call gfc_resolve_code recursively. */
16726 resolve_codes (gfc_namespace
*ns
)
16729 bitmap_obstack old_obstack
;
16731 if (ns
->resolved
== 1)
16734 for (n
= ns
->contained
; n
; n
= n
->sibling
)
16737 gfc_current_ns
= ns
;
16739 /* Don't clear 'cs_base' if this is the namespace of a BLOCK construct. */
16740 if (!(ns
->proc_name
&& ns
->proc_name
->attr
.flavor
== FL_LABEL
))
16743 /* Set to an out of range value. */
16744 current_entry_id
= -1;
16746 old_obstack
= labels_obstack
;
16747 bitmap_obstack_initialize (&labels_obstack
);
16749 gfc_resolve_oacc_declare (ns
);
16750 gfc_resolve_omp_local_vars (ns
);
16751 gfc_resolve_code (ns
->code
, ns
);
16753 bitmap_obstack_release (&labels_obstack
);
16754 labels_obstack
= old_obstack
;
16758 /* This function is called after a complete program unit has been compiled.
16759 Its purpose is to examine all of the expressions associated with a program
16760 unit, assign types to all intermediate expressions, make sure that all
16761 assignments are to compatible types and figure out which names refer to
16762 which functions or subroutines. */
16765 gfc_resolve (gfc_namespace
*ns
)
16767 gfc_namespace
*old_ns
;
16768 code_stack
*old_cs_base
;
16769 struct gfc_omp_saved_state old_omp_state
;
16775 old_ns
= gfc_current_ns
;
16776 old_cs_base
= cs_base
;
16778 /* As gfc_resolve can be called during resolution of an OpenMP construct
16779 body, we should clear any state associated to it, so that say NS's
16780 DO loops are not interpreted as OpenMP loops. */
16781 if (!ns
->construct_entities
)
16782 gfc_omp_save_and_clear_state (&old_omp_state
);
16784 resolve_types (ns
);
16785 component_assignment_level
= 0;
16786 resolve_codes (ns
);
16788 gfc_current_ns
= old_ns
;
16789 cs_base
= old_cs_base
;
16792 gfc_run_passes (ns
);
16794 if (!ns
->construct_entities
)
16795 gfc_omp_restore_state (&old_omp_state
);