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
;
5051 for (ref
= expr
->ref
; ref
; ref
= ref
->next
)
5052 if (ref
->type
== REF_ARRAY
&& ref
->u
.ar
.as
== NULL
)
5054 find_array_spec (expr
);
5059 for (prev
= &expr
->ref
; !breakout
&& *prev
!= NULL
; prev
= &(*prev
)->next
)
5060 switch ((*prev
)->type
)
5063 if (!resolve_array_ref (&(*prev
)->u
.ar
))
5072 equal_length
= false;
5073 if (!resolve_substring (*prev
, &equal_length
))
5076 if (expr
->expr_type
!= EXPR_SUBSTRING
&& equal_length
)
5078 /* Remove the reference and move the charlen, if any. */
5082 expr
->ts
.u
.cl
= ref
->u
.ss
.length
;
5083 ref
->u
.ss
.length
= NULL
;
5084 gfc_free_ref_list (ref
);
5091 /* Check constraints on part references. */
5093 current_part_dimension
= 0;
5094 seen_part_dimension
= 0;
5097 for (ref
= expr
->ref
; ref
; ref
= ref
->next
)
5102 switch (ref
->u
.ar
.type
)
5105 /* Coarray scalar. */
5106 if (ref
->u
.ar
.as
->rank
== 0)
5108 current_part_dimension
= 0;
5113 current_part_dimension
= 1;
5117 current_part_dimension
= 0;
5121 gfc_internal_error ("resolve_ref(): Bad array reference");
5127 if (current_part_dimension
|| seen_part_dimension
)
5130 if (ref
->u
.c
.component
->attr
.pointer
5131 || ref
->u
.c
.component
->attr
.proc_pointer
5132 || (ref
->u
.c
.component
->ts
.type
== BT_CLASS
5133 && CLASS_DATA (ref
->u
.c
.component
)->attr
.pointer
))
5135 gfc_error ("Component to the right of a part reference "
5136 "with nonzero rank must not have the POINTER "
5137 "attribute at %L", &expr
->where
);
5140 else if (ref
->u
.c
.component
->attr
.allocatable
5141 || (ref
->u
.c
.component
->ts
.type
== BT_CLASS
5142 && CLASS_DATA (ref
->u
.c
.component
)->attr
.allocatable
))
5145 gfc_error ("Component to the right of a part reference "
5146 "with nonzero rank must not have the ALLOCATABLE "
5147 "attribute at %L", &expr
->where
);
5160 if (((ref
->type
== REF_COMPONENT
&& n_components
> 1)
5161 || ref
->next
== NULL
)
5162 && current_part_dimension
5163 && seen_part_dimension
)
5165 gfc_error ("Two or more part references with nonzero rank must "
5166 "not be specified at %L", &expr
->where
);
5170 if (ref
->type
== REF_COMPONENT
)
5172 if (current_part_dimension
)
5173 seen_part_dimension
= 1;
5175 /* reset to make sure */
5176 current_part_dimension
= 0;
5184 /* Given an expression, determine its shape. This is easier than it sounds.
5185 Leaves the shape array NULL if it is not possible to determine the shape. */
5188 expression_shape (gfc_expr
*e
)
5190 mpz_t array
[GFC_MAX_DIMENSIONS
];
5193 if (e
->rank
<= 0 || e
->shape
!= NULL
)
5196 for (i
= 0; i
< e
->rank
; i
++)
5197 if (!gfc_array_dimen_size (e
, i
, &array
[i
]))
5200 e
->shape
= gfc_get_shape (e
->rank
);
5202 memcpy (e
->shape
, array
, e
->rank
* sizeof (mpz_t
));
5207 for (i
--; i
>= 0; i
--)
5208 mpz_clear (array
[i
]);
5212 /* Given a variable expression node, compute the rank of the expression by
5213 examining the base symbol and any reference structures it may have. */
5216 expression_rank (gfc_expr
*e
)
5221 /* Just to make sure, because EXPR_COMPCALL's also have an e->ref and that
5222 could lead to serious confusion... */
5223 gcc_assert (e
->expr_type
!= EXPR_COMPCALL
);
5227 if (e
->expr_type
== EXPR_ARRAY
)
5229 /* Constructors can have a rank different from one via RESHAPE(). */
5231 if (e
->symtree
== NULL
)
5237 e
->rank
= (e
->symtree
->n
.sym
->as
== NULL
)
5238 ? 0 : e
->symtree
->n
.sym
->as
->rank
;
5244 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
5246 if (ref
->type
== REF_COMPONENT
&& ref
->u
.c
.component
->attr
.proc_pointer
5247 && ref
->u
.c
.component
->attr
.function
&& !ref
->next
)
5248 rank
= ref
->u
.c
.component
->as
? ref
->u
.c
.component
->as
->rank
: 0;
5250 if (ref
->type
!= REF_ARRAY
)
5253 if (ref
->u
.ar
.type
== AR_FULL
)
5255 rank
= ref
->u
.ar
.as
->rank
;
5259 if (ref
->u
.ar
.type
== AR_SECTION
)
5261 /* Figure out the rank of the section. */
5263 gfc_internal_error ("expression_rank(): Two array specs");
5265 for (i
= 0; i
< ref
->u
.ar
.dimen
; i
++)
5266 if (ref
->u
.ar
.dimen_type
[i
] == DIMEN_RANGE
5267 || ref
->u
.ar
.dimen_type
[i
] == DIMEN_VECTOR
)
5277 expression_shape (e
);
5282 add_caf_get_intrinsic (gfc_expr
*e
)
5284 gfc_expr
*wrapper
, *tmp_expr
;
5288 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
5289 if (ref
->type
== REF_ARRAY
&& ref
->u
.ar
.codimen
> 0)
5294 for (n
= ref
->u
.ar
.dimen
; n
< ref
->u
.ar
.dimen
+ ref
->u
.ar
.codimen
; n
++)
5295 if (ref
->u
.ar
.dimen_type
[n
] != DIMEN_ELEMENT
)
5298 tmp_expr
= XCNEW (gfc_expr
);
5300 wrapper
= gfc_build_intrinsic_call (gfc_current_ns
, GFC_ISYM_CAF_GET
,
5301 "caf_get", tmp_expr
->where
, 1, tmp_expr
);
5302 wrapper
->ts
= e
->ts
;
5303 wrapper
->rank
= e
->rank
;
5305 wrapper
->shape
= gfc_copy_shape (e
->shape
, e
->rank
);
5312 remove_caf_get_intrinsic (gfc_expr
*e
)
5314 gcc_assert (e
->expr_type
== EXPR_FUNCTION
&& e
->value
.function
.isym
5315 && e
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
);
5316 gfc_expr
*e2
= e
->value
.function
.actual
->expr
;
5317 e
->value
.function
.actual
->expr
= NULL
;
5318 gfc_free_actual_arglist (e
->value
.function
.actual
);
5319 gfc_free_shape (&e
->shape
, e
->rank
);
5325 /* Resolve a variable expression. */
5328 resolve_variable (gfc_expr
*e
)
5335 if (e
->symtree
== NULL
)
5337 sym
= e
->symtree
->n
.sym
;
5339 /* Use same check as for TYPE(*) below; this check has to be before TYPE(*)
5340 as ts.type is set to BT_ASSUMED in resolve_symbol. */
5341 if (sym
->attr
.ext_attr
& (1 << EXT_ATTR_NO_ARG_CHECK
))
5343 if (!actual_arg
|| inquiry_argument
)
5345 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute may only "
5346 "be used as actual argument", sym
->name
, &e
->where
);
5350 /* TS 29113, 407b. */
5351 else if (e
->ts
.type
== BT_ASSUMED
)
5355 gfc_error ("Assumed-type variable %s at %L may only be used "
5356 "as actual argument", sym
->name
, &e
->where
);
5359 else if (inquiry_argument
&& !first_actual_arg
)
5361 /* FIXME: It doesn't work reliably as inquiry_argument is not set
5362 for all inquiry functions in resolve_function; the reason is
5363 that the function-name resolution happens too late in that
5365 gfc_error ("Assumed-type variable %s at %L as actual argument to "
5366 "an inquiry function shall be the first argument",
5367 sym
->name
, &e
->where
);
5371 /* TS 29113, C535b. */
5372 else if ((sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
5373 && CLASS_DATA (sym
)->as
5374 && CLASS_DATA (sym
)->as
->type
== AS_ASSUMED_RANK
)
5375 || (sym
->ts
.type
!= BT_CLASS
&& sym
->as
5376 && sym
->as
->type
== AS_ASSUMED_RANK
))
5380 gfc_error ("Assumed-rank variable %s at %L may only be used as "
5381 "actual argument", sym
->name
, &e
->where
);
5384 else if (inquiry_argument
&& !first_actual_arg
)
5386 /* FIXME: It doesn't work reliably as inquiry_argument is not set
5387 for all inquiry functions in resolve_function; the reason is
5388 that the function-name resolution happens too late in that
5390 gfc_error ("Assumed-rank variable %s at %L as actual argument "
5391 "to an inquiry function shall be the first argument",
5392 sym
->name
, &e
->where
);
5397 if ((sym
->attr
.ext_attr
& (1 << EXT_ATTR_NO_ARG_CHECK
)) && e
->ref
5398 && !(e
->ref
->type
== REF_ARRAY
&& e
->ref
->u
.ar
.type
== AR_FULL
5399 && e
->ref
->next
== NULL
))
5401 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute shall not have "
5402 "a subobject reference", sym
->name
, &e
->ref
->u
.ar
.where
);
5405 /* TS 29113, 407b. */
5406 else if (e
->ts
.type
== BT_ASSUMED
&& e
->ref
5407 && !(e
->ref
->type
== REF_ARRAY
&& e
->ref
->u
.ar
.type
== AR_FULL
5408 && e
->ref
->next
== NULL
))
5410 gfc_error ("Assumed-type variable %s at %L shall not have a subobject "
5411 "reference", sym
->name
, &e
->ref
->u
.ar
.where
);
5415 /* TS 29113, C535b. */
5416 if (((sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
5417 && CLASS_DATA (sym
)->as
5418 && CLASS_DATA (sym
)->as
->type
== AS_ASSUMED_RANK
)
5419 || (sym
->ts
.type
!= BT_CLASS
&& sym
->as
5420 && sym
->as
->type
== AS_ASSUMED_RANK
))
5422 && !(e
->ref
->type
== REF_ARRAY
&& e
->ref
->u
.ar
.type
== AR_FULL
5423 && e
->ref
->next
== NULL
))
5425 gfc_error ("Assumed-rank variable %s at %L shall not have a subobject "
5426 "reference", sym
->name
, &e
->ref
->u
.ar
.where
);
5430 /* For variables that are used in an associate (target => object) where
5431 the object's basetype is array valued while the target is scalar,
5432 the ts' type of the component refs is still array valued, which
5433 can't be translated that way. */
5434 if (sym
->assoc
&& e
->rank
== 0 && e
->ref
&& sym
->ts
.type
== BT_CLASS
5435 && sym
->assoc
->target
&& sym
->assoc
->target
->ts
.type
== BT_CLASS
5436 && CLASS_DATA (sym
->assoc
->target
)->as
)
5438 gfc_ref
*ref
= e
->ref
;
5444 ref
->u
.c
.sym
= sym
->ts
.u
.derived
;
5445 /* Stop the loop. */
5455 /* If this is an associate-name, it may be parsed with an array reference
5456 in error even though the target is scalar. Fail directly in this case.
5457 TODO Understand why class scalar expressions must be excluded. */
5458 if (sym
->assoc
&& !(sym
->ts
.type
== BT_CLASS
&& e
->rank
== 0))
5460 if (sym
->ts
.type
== BT_CLASS
)
5461 gfc_fix_class_refs (e
);
5462 if (!sym
->attr
.dimension
&& e
->ref
&& e
->ref
->type
== REF_ARRAY
)
5464 else if (sym
->attr
.dimension
&& (!e
->ref
|| e
->ref
->type
!= REF_ARRAY
))
5466 /* This can happen because the parser did not detect that the
5467 associate name is an array and the expression had no array
5469 gfc_ref
*ref
= gfc_get_ref ();
5470 ref
->type
= REF_ARRAY
;
5471 ref
->u
.ar
= *gfc_get_array_ref();
5472 ref
->u
.ar
.type
= AR_FULL
;
5475 ref
->u
.ar
.as
= sym
->as
;
5476 ref
->u
.ar
.dimen
= sym
->as
->rank
;
5484 if (sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
->attr
.generic
)
5485 sym
->ts
.u
.derived
= gfc_find_dt_in_generic (sym
->ts
.u
.derived
);
5487 /* On the other hand, the parser may not have known this is an array;
5488 in this case, we have to add a FULL reference. */
5489 if (sym
->assoc
&& sym
->attr
.dimension
&& !e
->ref
)
5491 e
->ref
= gfc_get_ref ();
5492 e
->ref
->type
= REF_ARRAY
;
5493 e
->ref
->u
.ar
.type
= AR_FULL
;
5494 e
->ref
->u
.ar
.dimen
= 0;
5497 /* Like above, but for class types, where the checking whether an array
5498 ref is present is more complicated. Furthermore make sure not to add
5499 the full array ref to _vptr or _len refs. */
5500 if (sym
->assoc
&& sym
->ts
.type
== BT_CLASS
5501 && CLASS_DATA (sym
)->attr
.dimension
5502 && (e
->ts
.type
!= BT_DERIVED
|| !e
->ts
.u
.derived
->attr
.vtype
))
5504 gfc_ref
*ref
, *newref
;
5506 newref
= gfc_get_ref ();
5507 newref
->type
= REF_ARRAY
;
5508 newref
->u
.ar
.type
= AR_FULL
;
5509 newref
->u
.ar
.dimen
= 0;
5510 /* Because this is an associate var and the first ref either is a ref to
5511 the _data component or not, no traversal of the ref chain is
5512 needed. The array ref needs to be inserted after the _data ref,
5513 or when that is not present, which may happend for polymorphic
5514 types, then at the first position. */
5518 else if (ref
->type
== REF_COMPONENT
5519 && strcmp ("_data", ref
->u
.c
.component
->name
) == 0)
5521 if (!ref
->next
|| ref
->next
->type
!= REF_ARRAY
)
5523 newref
->next
= ref
->next
;
5527 /* Array ref present already. */
5528 gfc_free_ref_list (newref
);
5530 else if (ref
->type
== REF_ARRAY
)
5531 /* Array ref present already. */
5532 gfc_free_ref_list (newref
);
5540 if (e
->ref
&& !resolve_ref (e
))
5543 if (sym
->attr
.flavor
== FL_PROCEDURE
5544 && (!sym
->attr
.function
5545 || (sym
->attr
.function
&& sym
->result
5546 && sym
->result
->attr
.proc_pointer
5547 && !sym
->result
->attr
.function
)))
5549 e
->ts
.type
= BT_PROCEDURE
;
5550 goto resolve_procedure
;
5553 if (sym
->ts
.type
!= BT_UNKNOWN
)
5554 gfc_variable_attr (e
, &e
->ts
);
5555 else if (sym
->attr
.flavor
== FL_PROCEDURE
5556 && sym
->attr
.function
&& sym
->result
5557 && sym
->result
->ts
.type
!= BT_UNKNOWN
5558 && sym
->result
->attr
.proc_pointer
)
5559 e
->ts
= sym
->result
->ts
;
5562 /* Must be a simple variable reference. */
5563 if (!gfc_set_default_type (sym
, 1, sym
->ns
))
5568 if (check_assumed_size_reference (sym
, e
))
5571 /* Deal with forward references to entries during gfc_resolve_code, to
5572 satisfy, at least partially, 12.5.2.5. */
5573 if (gfc_current_ns
->entries
5574 && current_entry_id
== sym
->entry_id
5577 && cs_base
->current
->op
!= EXEC_ENTRY
)
5579 gfc_entry_list
*entry
;
5580 gfc_formal_arglist
*formal
;
5582 bool seen
, saved_specification_expr
;
5584 /* If the symbol is a dummy... */
5585 if (sym
->attr
.dummy
&& sym
->ns
== gfc_current_ns
)
5587 entry
= gfc_current_ns
->entries
;
5590 /* ...test if the symbol is a parameter of previous entries. */
5591 for (; entry
&& entry
->id
<= current_entry_id
; entry
= entry
->next
)
5592 for (formal
= entry
->sym
->formal
; formal
; formal
= formal
->next
)
5594 if (formal
->sym
&& sym
->name
== formal
->sym
->name
)
5601 /* If it has not been seen as a dummy, this is an error. */
5604 if (specification_expr
)
5605 gfc_error ("Variable %qs, used in a specification expression"
5606 ", is referenced at %L before the ENTRY statement "
5607 "in which it is a parameter",
5608 sym
->name
, &cs_base
->current
->loc
);
5610 gfc_error ("Variable %qs is used at %L before the ENTRY "
5611 "statement in which it is a parameter",
5612 sym
->name
, &cs_base
->current
->loc
);
5617 /* Now do the same check on the specification expressions. */
5618 saved_specification_expr
= specification_expr
;
5619 specification_expr
= true;
5620 if (sym
->ts
.type
== BT_CHARACTER
5621 && !gfc_resolve_expr (sym
->ts
.u
.cl
->length
))
5625 for (n
= 0; n
< sym
->as
->rank
; n
++)
5627 if (!gfc_resolve_expr (sym
->as
->lower
[n
]))
5629 if (!gfc_resolve_expr (sym
->as
->upper
[n
]))
5632 specification_expr
= saved_specification_expr
;
5635 /* Update the symbol's entry level. */
5636 sym
->entry_id
= current_entry_id
+ 1;
5639 /* If a symbol has been host_associated mark it. This is used latter,
5640 to identify if aliasing is possible via host association. */
5641 if (sym
->attr
.flavor
== FL_VARIABLE
5642 && gfc_current_ns
->parent
5643 && (gfc_current_ns
->parent
== sym
->ns
5644 || (gfc_current_ns
->parent
->parent
5645 && gfc_current_ns
->parent
->parent
== sym
->ns
)))
5646 sym
->attr
.host_assoc
= 1;
5648 if (gfc_current_ns
->proc_name
5649 && sym
->attr
.dimension
5650 && (sym
->ns
!= gfc_current_ns
5651 || sym
->attr
.use_assoc
5652 || sym
->attr
.in_common
))
5653 gfc_current_ns
->proc_name
->attr
.array_outer_dependency
= 1;
5656 if (t
&& !resolve_procedure_expression (e
))
5659 /* F2008, C617 and C1229. */
5660 if (!inquiry_argument
&& (e
->ts
.type
== BT_CLASS
|| e
->ts
.type
== BT_DERIVED
)
5661 && gfc_is_coindexed (e
))
5663 gfc_ref
*ref
, *ref2
= NULL
;
5665 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
5667 if (ref
->type
== REF_COMPONENT
)
5669 if (ref
->type
== REF_ARRAY
&& ref
->u
.ar
.codimen
> 0)
5673 for ( ; ref
; ref
= ref
->next
)
5674 if (ref
->type
== REF_COMPONENT
)
5677 /* Expression itself is not coindexed object. */
5678 if (ref
&& e
->ts
.type
== BT_CLASS
)
5680 gfc_error ("Polymorphic subobject of coindexed object at %L",
5685 /* Expression itself is coindexed object. */
5689 c
= ref2
? ref2
->u
.c
.component
: e
->symtree
->n
.sym
->components
;
5690 for ( ; c
; c
= c
->next
)
5691 if (c
->attr
.allocatable
&& c
->ts
.type
== BT_CLASS
)
5693 gfc_error ("Coindexed object with polymorphic allocatable "
5694 "subcomponent at %L", &e
->where
);
5702 expression_rank (e
);
5704 if (t
&& flag_coarray
== GFC_FCOARRAY_LIB
&& gfc_is_coindexed (e
))
5705 add_caf_get_intrinsic (e
);
5707 /* Simplify cases where access to a parameter array results in a
5708 single constant. Suppress errors since those will have been
5709 issued before, as warnings. */
5710 if (e
->rank
== 0 && sym
->as
&& sym
->attr
.flavor
== FL_PARAMETER
)
5712 gfc_push_suppress_errors ();
5713 gfc_simplify_expr (e
, 1);
5714 gfc_pop_suppress_errors ();
5721 /* Checks to see that the correct symbol has been host associated.
5722 The only situation where this arises is that in which a twice
5723 contained function is parsed after the host association is made.
5724 Therefore, on detecting this, change the symbol in the expression
5725 and convert the array reference into an actual arglist if the old
5726 symbol is a variable. */
5728 check_host_association (gfc_expr
*e
)
5730 gfc_symbol
*sym
, *old_sym
;
5734 gfc_actual_arglist
*arg
, *tail
= NULL
;
5735 bool retval
= e
->expr_type
== EXPR_FUNCTION
;
5737 /* If the expression is the result of substitution in
5738 interface.c(gfc_extend_expr) because there is no way in
5739 which the host association can be wrong. */
5740 if (e
->symtree
== NULL
5741 || e
->symtree
->n
.sym
== NULL
5742 || e
->user_operator
)
5745 old_sym
= e
->symtree
->n
.sym
;
5747 if (gfc_current_ns
->parent
5748 && old_sym
->ns
!= gfc_current_ns
)
5750 /* Use the 'USE' name so that renamed module symbols are
5751 correctly handled. */
5752 gfc_find_symbol (e
->symtree
->name
, gfc_current_ns
, 1, &sym
);
5754 if (sym
&& old_sym
!= sym
5755 && sym
->ts
.type
== old_sym
->ts
.type
5756 && sym
->attr
.flavor
== FL_PROCEDURE
5757 && sym
->attr
.contained
)
5759 /* Clear the shape, since it might not be valid. */
5760 gfc_free_shape (&e
->shape
, e
->rank
);
5762 /* Give the expression the right symtree! */
5763 gfc_find_sym_tree (e
->symtree
->name
, NULL
, 1, &st
);
5764 gcc_assert (st
!= NULL
);
5766 if (old_sym
->attr
.flavor
== FL_PROCEDURE
5767 || e
->expr_type
== EXPR_FUNCTION
)
5769 /* Original was function so point to the new symbol, since
5770 the actual argument list is already attached to the
5772 e
->value
.function
.esym
= NULL
;
5777 /* Original was variable so convert array references into
5778 an actual arglist. This does not need any checking now
5779 since resolve_function will take care of it. */
5780 e
->value
.function
.actual
= NULL
;
5781 e
->expr_type
= EXPR_FUNCTION
;
5784 /* Ambiguity will not arise if the array reference is not
5785 the last reference. */
5786 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
5787 if (ref
->type
== REF_ARRAY
&& ref
->next
== NULL
)
5790 gcc_assert (ref
->type
== REF_ARRAY
);
5792 /* Grab the start expressions from the array ref and
5793 copy them into actual arguments. */
5794 for (n
= 0; n
< ref
->u
.ar
.dimen
; n
++)
5796 arg
= gfc_get_actual_arglist ();
5797 arg
->expr
= gfc_copy_expr (ref
->u
.ar
.start
[n
]);
5798 if (e
->value
.function
.actual
== NULL
)
5799 tail
= e
->value
.function
.actual
= arg
;
5807 /* Dump the reference list and set the rank. */
5808 gfc_free_ref_list (e
->ref
);
5810 e
->rank
= sym
->as
? sym
->as
->rank
: 0;
5813 gfc_resolve_expr (e
);
5817 /* This might have changed! */
5818 return e
->expr_type
== EXPR_FUNCTION
;
5823 gfc_resolve_character_operator (gfc_expr
*e
)
5825 gfc_expr
*op1
= e
->value
.op
.op1
;
5826 gfc_expr
*op2
= e
->value
.op
.op2
;
5827 gfc_expr
*e1
= NULL
;
5828 gfc_expr
*e2
= NULL
;
5830 gcc_assert (e
->value
.op
.op
== INTRINSIC_CONCAT
);
5832 if (op1
->ts
.u
.cl
&& op1
->ts
.u
.cl
->length
)
5833 e1
= gfc_copy_expr (op1
->ts
.u
.cl
->length
);
5834 else if (op1
->expr_type
== EXPR_CONSTANT
)
5835 e1
= gfc_get_int_expr (gfc_charlen_int_kind
, NULL
,
5836 op1
->value
.character
.length
);
5838 if (op2
->ts
.u
.cl
&& op2
->ts
.u
.cl
->length
)
5839 e2
= gfc_copy_expr (op2
->ts
.u
.cl
->length
);
5840 else if (op2
->expr_type
== EXPR_CONSTANT
)
5841 e2
= gfc_get_int_expr (gfc_charlen_int_kind
, NULL
,
5842 op2
->value
.character
.length
);
5844 e
->ts
.u
.cl
= gfc_new_charlen (gfc_current_ns
, NULL
);
5854 e
->ts
.u
.cl
->length
= gfc_add (e1
, e2
);
5855 e
->ts
.u
.cl
->length
->ts
.type
= BT_INTEGER
;
5856 e
->ts
.u
.cl
->length
->ts
.kind
= gfc_charlen_int_kind
;
5857 gfc_simplify_expr (e
->ts
.u
.cl
->length
, 0);
5858 gfc_resolve_expr (e
->ts
.u
.cl
->length
);
5864 /* Ensure that an character expression has a charlen and, if possible, a
5865 length expression. */
5868 fixup_charlen (gfc_expr
*e
)
5870 /* The cases fall through so that changes in expression type and the need
5871 for multiple fixes are picked up. In all circumstances, a charlen should
5872 be available for the middle end to hang a backend_decl on. */
5873 switch (e
->expr_type
)
5876 gfc_resolve_character_operator (e
);
5880 if (e
->expr_type
== EXPR_ARRAY
)
5881 gfc_resolve_character_array_constructor (e
);
5884 case EXPR_SUBSTRING
:
5885 if (!e
->ts
.u
.cl
&& e
->ref
)
5886 gfc_resolve_substring_charlen (e
);
5891 e
->ts
.u
.cl
= gfc_new_charlen (gfc_current_ns
, NULL
);
5898 /* Update an actual argument to include the passed-object for type-bound
5899 procedures at the right position. */
5901 static gfc_actual_arglist
*
5902 update_arglist_pass (gfc_actual_arglist
* lst
, gfc_expr
* po
, unsigned argpos
,
5905 gcc_assert (argpos
> 0);
5909 gfc_actual_arglist
* result
;
5911 result
= gfc_get_actual_arglist ();
5915 result
->name
= name
;
5921 lst
->next
= update_arglist_pass (lst
->next
, po
, argpos
- 1, name
);
5923 lst
= update_arglist_pass (NULL
, po
, argpos
- 1, name
);
5928 /* Extract the passed-object from an EXPR_COMPCALL (a copy of it). */
5931 extract_compcall_passed_object (gfc_expr
* e
)
5935 gcc_assert (e
->expr_type
== EXPR_COMPCALL
);
5937 if (e
->value
.compcall
.base_object
)
5938 po
= gfc_copy_expr (e
->value
.compcall
.base_object
);
5941 po
= gfc_get_expr ();
5942 po
->expr_type
= EXPR_VARIABLE
;
5943 po
->symtree
= e
->symtree
;
5944 po
->ref
= gfc_copy_ref (e
->ref
);
5945 po
->where
= e
->where
;
5948 if (!gfc_resolve_expr (po
))
5955 /* Update the arglist of an EXPR_COMPCALL expression to include the
5959 update_compcall_arglist (gfc_expr
* e
)
5962 gfc_typebound_proc
* tbp
;
5964 tbp
= e
->value
.compcall
.tbp
;
5969 po
= extract_compcall_passed_object (e
);
5973 if (tbp
->nopass
|| e
->value
.compcall
.ignore_pass
)
5979 if (tbp
->pass_arg_num
<= 0)
5982 e
->value
.compcall
.actual
= update_arglist_pass (e
->value
.compcall
.actual
, po
,
5990 /* Extract the passed object from a PPC call (a copy of it). */
5993 extract_ppc_passed_object (gfc_expr
*e
)
5998 po
= gfc_get_expr ();
5999 po
->expr_type
= EXPR_VARIABLE
;
6000 po
->symtree
= e
->symtree
;
6001 po
->ref
= gfc_copy_ref (e
->ref
);
6002 po
->where
= e
->where
;
6004 /* Remove PPC reference. */
6006 while ((*ref
)->next
)
6007 ref
= &(*ref
)->next
;
6008 gfc_free_ref_list (*ref
);
6011 if (!gfc_resolve_expr (po
))
6018 /* Update the actual arglist of a procedure pointer component to include the
6022 update_ppc_arglist (gfc_expr
* e
)
6026 gfc_typebound_proc
* tb
;
6028 ppc
= gfc_get_proc_ptr_comp (e
);
6036 else if (tb
->nopass
)
6039 po
= extract_ppc_passed_object (e
);
6046 gfc_error ("Passed-object at %L must be scalar", &e
->where
);
6051 if (po
->ts
.type
== BT_DERIVED
&& po
->ts
.u
.derived
->attr
.abstract
)
6053 gfc_error ("Base object for procedure-pointer component call at %L is of"
6054 " ABSTRACT type %qs", &e
->where
, po
->ts
.u
.derived
->name
);
6058 gcc_assert (tb
->pass_arg_num
> 0);
6059 e
->value
.compcall
.actual
= update_arglist_pass (e
->value
.compcall
.actual
, po
,
6067 /* Check that the object a TBP is called on is valid, i.e. it must not be
6068 of ABSTRACT type (as in subobject%abstract_parent%tbp()). */
6071 check_typebound_baseobject (gfc_expr
* e
)
6074 bool return_value
= false;
6076 base
= extract_compcall_passed_object (e
);
6080 gcc_assert (base
->ts
.type
== BT_DERIVED
|| base
->ts
.type
== BT_CLASS
);
6082 if (base
->ts
.type
== BT_CLASS
&& !gfc_expr_attr (base
).class_ok
)
6086 if (base
->ts
.type
== BT_DERIVED
&& base
->ts
.u
.derived
->attr
.abstract
)
6088 gfc_error ("Base object for type-bound procedure call at %L is of"
6089 " ABSTRACT type %qs", &e
->where
, base
->ts
.u
.derived
->name
);
6093 /* F08:C1230. If the procedure called is NOPASS,
6094 the base object must be scalar. */
6095 if (e
->value
.compcall
.tbp
->nopass
&& base
->rank
!= 0)
6097 gfc_error ("Base object for NOPASS type-bound procedure call at %L must"
6098 " be scalar", &e
->where
);
6102 return_value
= true;
6105 gfc_free_expr (base
);
6106 return return_value
;
6110 /* Resolve a call to a type-bound procedure, either function or subroutine,
6111 statically from the data in an EXPR_COMPCALL expression. The adapted
6112 arglist and the target-procedure symtree are returned. */
6115 resolve_typebound_static (gfc_expr
* e
, gfc_symtree
** target
,
6116 gfc_actual_arglist
** actual
)
6118 gcc_assert (e
->expr_type
== EXPR_COMPCALL
);
6119 gcc_assert (!e
->value
.compcall
.tbp
->is_generic
);
6121 /* Update the actual arglist for PASS. */
6122 if (!update_compcall_arglist (e
))
6125 *actual
= e
->value
.compcall
.actual
;
6126 *target
= e
->value
.compcall
.tbp
->u
.specific
;
6128 gfc_free_ref_list (e
->ref
);
6130 e
->value
.compcall
.actual
= NULL
;
6132 /* If we find a deferred typebound procedure, check for derived types
6133 that an overriding typebound procedure has not been missed. */
6134 if (e
->value
.compcall
.name
6135 && !e
->value
.compcall
.tbp
->non_overridable
6136 && e
->value
.compcall
.base_object
6137 && e
->value
.compcall
.base_object
->ts
.type
== BT_DERIVED
)
6140 gfc_symbol
*derived
;
6142 /* Use the derived type of the base_object. */
6143 derived
= e
->value
.compcall
.base_object
->ts
.u
.derived
;
6146 /* If necessary, go through the inheritance chain. */
6147 while (!st
&& derived
)
6149 /* Look for the typebound procedure 'name'. */
6150 if (derived
->f2k_derived
&& derived
->f2k_derived
->tb_sym_root
)
6151 st
= gfc_find_symtree (derived
->f2k_derived
->tb_sym_root
,
6152 e
->value
.compcall
.name
);
6154 derived
= gfc_get_derived_super_type (derived
);
6157 /* Now find the specific name in the derived type namespace. */
6158 if (st
&& st
->n
.tb
&& st
->n
.tb
->u
.specific
)
6159 gfc_find_sym_tree (st
->n
.tb
->u
.specific
->name
,
6160 derived
->ns
, 1, &st
);
6168 /* Get the ultimate declared type from an expression. In addition,
6169 return the last class/derived type reference and the copy of the
6170 reference list. If check_types is set true, derived types are
6171 identified as well as class references. */
6173 get_declared_from_expr (gfc_ref
**class_ref
, gfc_ref
**new_ref
,
6174 gfc_expr
*e
, bool check_types
)
6176 gfc_symbol
*declared
;
6183 *new_ref
= gfc_copy_ref (e
->ref
);
6185 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
6187 if (ref
->type
!= REF_COMPONENT
)
6190 if ((ref
->u
.c
.component
->ts
.type
== BT_CLASS
6191 || (check_types
&& gfc_bt_struct (ref
->u
.c
.component
->ts
.type
)))
6192 && ref
->u
.c
.component
->attr
.flavor
!= FL_PROCEDURE
)
6194 declared
= ref
->u
.c
.component
->ts
.u
.derived
;
6200 if (declared
== NULL
)
6201 declared
= e
->symtree
->n
.sym
->ts
.u
.derived
;
6207 /* Given an EXPR_COMPCALL calling a GENERIC typebound procedure, figure out
6208 which of the specific bindings (if any) matches the arglist and transform
6209 the expression into a call of that binding. */
6212 resolve_typebound_generic_call (gfc_expr
* e
, const char **name
)
6214 gfc_typebound_proc
* genproc
;
6215 const char* genname
;
6217 gfc_symbol
*derived
;
6219 gcc_assert (e
->expr_type
== EXPR_COMPCALL
);
6220 genname
= e
->value
.compcall
.name
;
6221 genproc
= e
->value
.compcall
.tbp
;
6223 if (!genproc
->is_generic
)
6226 /* Try the bindings on this type and in the inheritance hierarchy. */
6227 for (; genproc
; genproc
= genproc
->overridden
)
6231 gcc_assert (genproc
->is_generic
);
6232 for (g
= genproc
->u
.generic
; g
; g
= g
->next
)
6235 gfc_actual_arglist
* args
;
6238 gcc_assert (g
->specific
);
6240 if (g
->specific
->error
)
6243 target
= g
->specific
->u
.specific
->n
.sym
;
6245 /* Get the right arglist by handling PASS/NOPASS. */
6246 args
= gfc_copy_actual_arglist (e
->value
.compcall
.actual
);
6247 if (!g
->specific
->nopass
)
6250 po
= extract_compcall_passed_object (e
);
6253 gfc_free_actual_arglist (args
);
6257 gcc_assert (g
->specific
->pass_arg_num
> 0);
6258 gcc_assert (!g
->specific
->error
);
6259 args
= update_arglist_pass (args
, po
, g
->specific
->pass_arg_num
,
6260 g
->specific
->pass_arg
);
6262 resolve_actual_arglist (args
, target
->attr
.proc
,
6263 is_external_proc (target
)
6264 && gfc_sym_get_dummy_args (target
) == NULL
);
6266 /* Check if this arglist matches the formal. */
6267 matches
= gfc_arglist_matches_symbol (&args
, target
);
6269 /* Clean up and break out of the loop if we've found it. */
6270 gfc_free_actual_arglist (args
);
6273 e
->value
.compcall
.tbp
= g
->specific
;
6274 genname
= g
->specific_st
->name
;
6275 /* Pass along the name for CLASS methods, where the vtab
6276 procedure pointer component has to be referenced. */
6284 /* Nothing matching found! */
6285 gfc_error ("Found no matching specific binding for the call to the GENERIC"
6286 " %qs at %L", genname
, &e
->where
);
6290 /* Make sure that we have the right specific instance for the name. */
6291 derived
= get_declared_from_expr (NULL
, NULL
, e
, true);
6293 st
= gfc_find_typebound_proc (derived
, NULL
, genname
, true, &e
->where
);
6295 e
->value
.compcall
.tbp
= st
->n
.tb
;
6301 /* Resolve a call to a type-bound subroutine. */
6304 resolve_typebound_call (gfc_code
* c
, const char **name
, bool *overridable
)
6306 gfc_actual_arglist
* newactual
;
6307 gfc_symtree
* target
;
6309 /* Check that's really a SUBROUTINE. */
6310 if (!c
->expr1
->value
.compcall
.tbp
->subroutine
)
6312 if (!c
->expr1
->value
.compcall
.tbp
->is_generic
6313 && c
->expr1
->value
.compcall
.tbp
->u
.specific
6314 && c
->expr1
->value
.compcall
.tbp
->u
.specific
->n
.sym
6315 && c
->expr1
->value
.compcall
.tbp
->u
.specific
->n
.sym
->attr
.subroutine
)
6316 c
->expr1
->value
.compcall
.tbp
->subroutine
= 1;
6319 gfc_error ("%qs at %L should be a SUBROUTINE",
6320 c
->expr1
->value
.compcall
.name
, &c
->loc
);
6325 if (!check_typebound_baseobject (c
->expr1
))
6328 /* Pass along the name for CLASS methods, where the vtab
6329 procedure pointer component has to be referenced. */
6331 *name
= c
->expr1
->value
.compcall
.name
;
6333 if (!resolve_typebound_generic_call (c
->expr1
, name
))
6336 /* Pass along the NON_OVERRIDABLE attribute of the specific TBP. */
6338 *overridable
= !c
->expr1
->value
.compcall
.tbp
->non_overridable
;
6340 /* Transform into an ordinary EXEC_CALL for now. */
6342 if (!resolve_typebound_static (c
->expr1
, &target
, &newactual
))
6345 c
->ext
.actual
= newactual
;
6346 c
->symtree
= target
;
6347 c
->op
= (c
->expr1
->value
.compcall
.assign
? EXEC_ASSIGN_CALL
: EXEC_CALL
);
6349 gcc_assert (!c
->expr1
->ref
&& !c
->expr1
->value
.compcall
.actual
);
6351 gfc_free_expr (c
->expr1
);
6352 c
->expr1
= gfc_get_expr ();
6353 c
->expr1
->expr_type
= EXPR_FUNCTION
;
6354 c
->expr1
->symtree
= target
;
6355 c
->expr1
->where
= c
->loc
;
6357 return resolve_call (c
);
6361 /* Resolve a component-call expression. */
6363 resolve_compcall (gfc_expr
* e
, const char **name
)
6365 gfc_actual_arglist
* newactual
;
6366 gfc_symtree
* target
;
6368 /* Check that's really a FUNCTION. */
6369 if (!e
->value
.compcall
.tbp
->function
)
6371 gfc_error ("%qs at %L should be a FUNCTION",
6372 e
->value
.compcall
.name
, &e
->where
);
6376 /* These must not be assign-calls! */
6377 gcc_assert (!e
->value
.compcall
.assign
);
6379 if (!check_typebound_baseobject (e
))
6382 /* Pass along the name for CLASS methods, where the vtab
6383 procedure pointer component has to be referenced. */
6385 *name
= e
->value
.compcall
.name
;
6387 if (!resolve_typebound_generic_call (e
, name
))
6389 gcc_assert (!e
->value
.compcall
.tbp
->is_generic
);
6391 /* Take the rank from the function's symbol. */
6392 if (e
->value
.compcall
.tbp
->u
.specific
->n
.sym
->as
)
6393 e
->rank
= e
->value
.compcall
.tbp
->u
.specific
->n
.sym
->as
->rank
;
6395 /* For now, we simply transform it into an EXPR_FUNCTION call with the same
6396 arglist to the TBP's binding target. */
6398 if (!resolve_typebound_static (e
, &target
, &newactual
))
6401 e
->value
.function
.actual
= newactual
;
6402 e
->value
.function
.name
= NULL
;
6403 e
->value
.function
.esym
= target
->n
.sym
;
6404 e
->value
.function
.isym
= NULL
;
6405 e
->symtree
= target
;
6406 e
->ts
= target
->n
.sym
->ts
;
6407 e
->expr_type
= EXPR_FUNCTION
;
6409 /* Resolution is not necessary if this is a class subroutine; this
6410 function only has to identify the specific proc. Resolution of
6411 the call will be done next in resolve_typebound_call. */
6412 return gfc_resolve_expr (e
);
6416 static bool resolve_fl_derived (gfc_symbol
*sym
);
6419 /* Resolve a typebound function, or 'method'. First separate all
6420 the non-CLASS references by calling resolve_compcall directly. */
6423 resolve_typebound_function (gfc_expr
* e
)
6425 gfc_symbol
*declared
;
6437 /* Deal with typebound operators for CLASS objects. */
6438 expr
= e
->value
.compcall
.base_object
;
6439 overridable
= !e
->value
.compcall
.tbp
->non_overridable
;
6440 if (expr
&& expr
->ts
.type
== BT_CLASS
&& e
->value
.compcall
.name
)
6442 /* If the base_object is not a variable, the corresponding actual
6443 argument expression must be stored in e->base_expression so
6444 that the corresponding tree temporary can be used as the base
6445 object in gfc_conv_procedure_call. */
6446 if (expr
->expr_type
!= EXPR_VARIABLE
)
6448 gfc_actual_arglist
*args
;
6450 for (args
= e
->value
.function
.actual
; args
; args
= args
->next
)
6452 if (expr
== args
->expr
)
6457 /* Since the typebound operators are generic, we have to ensure
6458 that any delays in resolution are corrected and that the vtab
6461 declared
= ts
.u
.derived
;
6462 c
= gfc_find_component (declared
, "_vptr", true, true, NULL
);
6463 if (c
->ts
.u
.derived
== NULL
)
6464 c
->ts
.u
.derived
= gfc_find_derived_vtab (declared
);
6466 if (!resolve_compcall (e
, &name
))
6469 /* Use the generic name if it is there. */
6470 name
= name
? name
: e
->value
.function
.esym
->name
;
6471 e
->symtree
= expr
->symtree
;
6472 e
->ref
= gfc_copy_ref (expr
->ref
);
6473 get_declared_from_expr (&class_ref
, NULL
, e
, false);
6475 /* Trim away the extraneous references that emerge from nested
6476 use of interface.c (extend_expr). */
6477 if (class_ref
&& class_ref
->next
)
6479 gfc_free_ref_list (class_ref
->next
);
6480 class_ref
->next
= NULL
;
6482 else if (e
->ref
&& !class_ref
&& expr
->ts
.type
!= BT_CLASS
)
6484 gfc_free_ref_list (e
->ref
);
6488 gfc_add_vptr_component (e
);
6489 gfc_add_component_ref (e
, name
);
6490 e
->value
.function
.esym
= NULL
;
6491 if (expr
->expr_type
!= EXPR_VARIABLE
)
6492 e
->base_expr
= expr
;
6497 return resolve_compcall (e
, NULL
);
6499 if (!resolve_ref (e
))
6502 /* Get the CLASS declared type. */
6503 declared
= get_declared_from_expr (&class_ref
, &new_ref
, e
, true);
6505 if (!resolve_fl_derived (declared
))
6508 /* Weed out cases of the ultimate component being a derived type. */
6509 if ((class_ref
&& gfc_bt_struct (class_ref
->u
.c
.component
->ts
.type
))
6510 || (!class_ref
&& st
->n
.sym
->ts
.type
!= BT_CLASS
))
6512 gfc_free_ref_list (new_ref
);
6513 return resolve_compcall (e
, NULL
);
6516 c
= gfc_find_component (declared
, "_data", true, true, NULL
);
6517 declared
= c
->ts
.u
.derived
;
6519 /* Treat the call as if it is a typebound procedure, in order to roll
6520 out the correct name for the specific function. */
6521 if (!resolve_compcall (e
, &name
))
6523 gfc_free_ref_list (new_ref
);
6530 /* Convert the expression to a procedure pointer component call. */
6531 e
->value
.function
.esym
= NULL
;
6537 /* '_vptr' points to the vtab, which contains the procedure pointers. */
6538 gfc_add_vptr_component (e
);
6539 gfc_add_component_ref (e
, name
);
6541 /* Recover the typespec for the expression. This is really only
6542 necessary for generic procedures, where the additional call
6543 to gfc_add_component_ref seems to throw the collection of the
6544 correct typespec. */
6548 gfc_free_ref_list (new_ref
);
6553 /* Resolve a typebound subroutine, or 'method'. First separate all
6554 the non-CLASS references by calling resolve_typebound_call
6558 resolve_typebound_subroutine (gfc_code
*code
)
6560 gfc_symbol
*declared
;
6570 st
= code
->expr1
->symtree
;
6572 /* Deal with typebound operators for CLASS objects. */
6573 expr
= code
->expr1
->value
.compcall
.base_object
;
6574 overridable
= !code
->expr1
->value
.compcall
.tbp
->non_overridable
;
6575 if (expr
&& expr
->ts
.type
== BT_CLASS
&& code
->expr1
->value
.compcall
.name
)
6577 /* If the base_object is not a variable, the corresponding actual
6578 argument expression must be stored in e->base_expression so
6579 that the corresponding tree temporary can be used as the base
6580 object in gfc_conv_procedure_call. */
6581 if (expr
->expr_type
!= EXPR_VARIABLE
)
6583 gfc_actual_arglist
*args
;
6585 args
= code
->expr1
->value
.function
.actual
;
6586 for (; args
; args
= args
->next
)
6587 if (expr
== args
->expr
)
6591 /* Since the typebound operators are generic, we have to ensure
6592 that any delays in resolution are corrected and that the vtab
6594 declared
= expr
->ts
.u
.derived
;
6595 c
= gfc_find_component (declared
, "_vptr", true, true, NULL
);
6596 if (c
->ts
.u
.derived
== NULL
)
6597 c
->ts
.u
.derived
= gfc_find_derived_vtab (declared
);
6599 if (!resolve_typebound_call (code
, &name
, NULL
))
6602 /* Use the generic name if it is there. */
6603 name
= name
? name
: code
->expr1
->value
.function
.esym
->name
;
6604 code
->expr1
->symtree
= expr
->symtree
;
6605 code
->expr1
->ref
= gfc_copy_ref (expr
->ref
);
6607 /* Trim away the extraneous references that emerge from nested
6608 use of interface.c (extend_expr). */
6609 get_declared_from_expr (&class_ref
, NULL
, code
->expr1
, false);
6610 if (class_ref
&& class_ref
->next
)
6612 gfc_free_ref_list (class_ref
->next
);
6613 class_ref
->next
= NULL
;
6615 else if (code
->expr1
->ref
&& !class_ref
)
6617 gfc_free_ref_list (code
->expr1
->ref
);
6618 code
->expr1
->ref
= NULL
;
6621 /* Now use the procedure in the vtable. */
6622 gfc_add_vptr_component (code
->expr1
);
6623 gfc_add_component_ref (code
->expr1
, name
);
6624 code
->expr1
->value
.function
.esym
= NULL
;
6625 if (expr
->expr_type
!= EXPR_VARIABLE
)
6626 code
->expr1
->base_expr
= expr
;
6631 return resolve_typebound_call (code
, NULL
, NULL
);
6633 if (!resolve_ref (code
->expr1
))
6636 /* Get the CLASS declared type. */
6637 get_declared_from_expr (&class_ref
, &new_ref
, code
->expr1
, true);
6639 /* Weed out cases of the ultimate component being a derived type. */
6640 if ((class_ref
&& gfc_bt_struct (class_ref
->u
.c
.component
->ts
.type
))
6641 || (!class_ref
&& st
->n
.sym
->ts
.type
!= BT_CLASS
))
6643 gfc_free_ref_list (new_ref
);
6644 return resolve_typebound_call (code
, NULL
, NULL
);
6647 if (!resolve_typebound_call (code
, &name
, &overridable
))
6649 gfc_free_ref_list (new_ref
);
6652 ts
= code
->expr1
->ts
;
6656 /* Convert the expression to a procedure pointer component call. */
6657 code
->expr1
->value
.function
.esym
= NULL
;
6658 code
->expr1
->symtree
= st
;
6661 code
->expr1
->ref
= new_ref
;
6663 /* '_vptr' points to the vtab, which contains the procedure pointers. */
6664 gfc_add_vptr_component (code
->expr1
);
6665 gfc_add_component_ref (code
->expr1
, name
);
6667 /* Recover the typespec for the expression. This is really only
6668 necessary for generic procedures, where the additional call
6669 to gfc_add_component_ref seems to throw the collection of the
6670 correct typespec. */
6671 code
->expr1
->ts
= ts
;
6674 gfc_free_ref_list (new_ref
);
6680 /* Resolve a CALL to a Procedure Pointer Component (Subroutine). */
6683 resolve_ppc_call (gfc_code
* c
)
6685 gfc_component
*comp
;
6687 comp
= gfc_get_proc_ptr_comp (c
->expr1
);
6688 gcc_assert (comp
!= NULL
);
6690 c
->resolved_sym
= c
->expr1
->symtree
->n
.sym
;
6691 c
->expr1
->expr_type
= EXPR_VARIABLE
;
6693 if (!comp
->attr
.subroutine
)
6694 gfc_add_subroutine (&comp
->attr
, comp
->name
, &c
->expr1
->where
);
6696 if (!resolve_ref (c
->expr1
))
6699 if (!update_ppc_arglist (c
->expr1
))
6702 c
->ext
.actual
= c
->expr1
->value
.compcall
.actual
;
6704 if (!resolve_actual_arglist (c
->ext
.actual
, comp
->attr
.proc
,
6705 !(comp
->ts
.interface
6706 && comp
->ts
.interface
->formal
)))
6709 if (!pure_subroutine (comp
->ts
.interface
, comp
->name
, &c
->expr1
->where
))
6712 gfc_ppc_use (comp
, &c
->expr1
->value
.compcall
.actual
, &c
->expr1
->where
);
6718 /* Resolve a Function Call to a Procedure Pointer Component (Function). */
6721 resolve_expr_ppc (gfc_expr
* e
)
6723 gfc_component
*comp
;
6725 comp
= gfc_get_proc_ptr_comp (e
);
6726 gcc_assert (comp
!= NULL
);
6728 /* Convert to EXPR_FUNCTION. */
6729 e
->expr_type
= EXPR_FUNCTION
;
6730 e
->value
.function
.isym
= NULL
;
6731 e
->value
.function
.actual
= e
->value
.compcall
.actual
;
6733 if (comp
->as
!= NULL
)
6734 e
->rank
= comp
->as
->rank
;
6736 if (!comp
->attr
.function
)
6737 gfc_add_function (&comp
->attr
, comp
->name
, &e
->where
);
6739 if (!resolve_ref (e
))
6742 if (!resolve_actual_arglist (e
->value
.function
.actual
, comp
->attr
.proc
,
6743 !(comp
->ts
.interface
6744 && comp
->ts
.interface
->formal
)))
6747 if (!update_ppc_arglist (e
))
6750 if (!check_pure_function(e
))
6753 gfc_ppc_use (comp
, &e
->value
.compcall
.actual
, &e
->where
);
6760 gfc_is_expandable_expr (gfc_expr
*e
)
6762 gfc_constructor
*con
;
6764 if (e
->expr_type
== EXPR_ARRAY
)
6766 /* Traverse the constructor looking for variables that are flavor
6767 parameter. Parameters must be expanded since they are fully used at
6769 con
= gfc_constructor_first (e
->value
.constructor
);
6770 for (; con
; con
= gfc_constructor_next (con
))
6772 if (con
->expr
->expr_type
== EXPR_VARIABLE
6773 && con
->expr
->symtree
6774 && (con
->expr
->symtree
->n
.sym
->attr
.flavor
== FL_PARAMETER
6775 || con
->expr
->symtree
->n
.sym
->attr
.flavor
== FL_VARIABLE
))
6777 if (con
->expr
->expr_type
== EXPR_ARRAY
6778 && gfc_is_expandable_expr (con
->expr
))
6787 /* Sometimes variables in specification expressions of the result
6788 of module procedures in submodules wind up not being the 'real'
6789 dummy. Find this, if possible, in the namespace of the first
6793 fixup_unique_dummy (gfc_expr
*e
)
6795 gfc_symtree
*st
= NULL
;
6796 gfc_symbol
*s
= NULL
;
6798 if (e
->symtree
->n
.sym
->ns
->proc_name
6799 && e
->symtree
->n
.sym
->ns
->proc_name
->formal
)
6800 s
= e
->symtree
->n
.sym
->ns
->proc_name
->formal
->sym
;
6803 st
= gfc_find_symtree (s
->ns
->sym_root
, e
->symtree
->n
.sym
->name
);
6806 && st
->n
.sym
!= NULL
6807 && st
->n
.sym
->attr
.dummy
)
6811 /* Resolve an expression. That is, make sure that types of operands agree
6812 with their operators, intrinsic operators are converted to function calls
6813 for overloaded types and unresolved function references are resolved. */
6816 gfc_resolve_expr (gfc_expr
*e
)
6819 bool inquiry_save
, actual_arg_save
, first_actual_arg_save
;
6824 /* inquiry_argument only applies to variables. */
6825 inquiry_save
= inquiry_argument
;
6826 actual_arg_save
= actual_arg
;
6827 first_actual_arg_save
= first_actual_arg
;
6829 if (e
->expr_type
!= EXPR_VARIABLE
)
6831 inquiry_argument
= false;
6833 first_actual_arg
= false;
6835 else if (e
->symtree
!= NULL
6836 && *e
->symtree
->name
== '@'
6837 && e
->symtree
->n
.sym
->attr
.dummy
)
6839 /* Deal with submodule specification expressions that are not
6840 found to be referenced in module.c(read_cleanup). */
6841 fixup_unique_dummy (e
);
6844 switch (e
->expr_type
)
6847 t
= resolve_operator (e
);
6853 if (check_host_association (e
))
6854 t
= resolve_function (e
);
6856 t
= resolve_variable (e
);
6858 if (e
->ts
.type
== BT_CHARACTER
&& e
->ts
.u
.cl
== NULL
&& e
->ref
6859 && e
->ref
->type
!= REF_SUBSTRING
)
6860 gfc_resolve_substring_charlen (e
);
6865 t
= resolve_typebound_function (e
);
6868 case EXPR_SUBSTRING
:
6869 t
= resolve_ref (e
);
6878 t
= resolve_expr_ppc (e
);
6883 if (!resolve_ref (e
))
6886 t
= gfc_resolve_array_constructor (e
);
6887 /* Also try to expand a constructor. */
6890 expression_rank (e
);
6891 if (gfc_is_constant_expr (e
) || gfc_is_expandable_expr (e
))
6892 gfc_expand_constructor (e
, false);
6895 /* This provides the opportunity for the length of constructors with
6896 character valued function elements to propagate the string length
6897 to the expression. */
6898 if (t
&& e
->ts
.type
== BT_CHARACTER
)
6900 /* For efficiency, we call gfc_expand_constructor for BT_CHARACTER
6901 here rather then add a duplicate test for it above. */
6902 gfc_expand_constructor (e
, false);
6903 t
= gfc_resolve_character_array_constructor (e
);
6908 case EXPR_STRUCTURE
:
6909 t
= resolve_ref (e
);
6913 t
= resolve_structure_cons (e
, 0);
6917 t
= gfc_simplify_expr (e
, 0);
6921 gfc_internal_error ("gfc_resolve_expr(): Bad expression type");
6924 if (e
->ts
.type
== BT_CHARACTER
&& t
&& !e
->ts
.u
.cl
)
6927 inquiry_argument
= inquiry_save
;
6928 actual_arg
= actual_arg_save
;
6929 first_actual_arg
= first_actual_arg_save
;
6935 /* Resolve an expression from an iterator. They must be scalar and have
6936 INTEGER or (optionally) REAL type. */
6939 gfc_resolve_iterator_expr (gfc_expr
*expr
, bool real_ok
,
6940 const char *name_msgid
)
6942 if (!gfc_resolve_expr (expr
))
6945 if (expr
->rank
!= 0)
6947 gfc_error ("%s at %L must be a scalar", _(name_msgid
), &expr
->where
);
6951 if (expr
->ts
.type
!= BT_INTEGER
)
6953 if (expr
->ts
.type
== BT_REAL
)
6956 return gfc_notify_std (GFC_STD_F95_DEL
,
6957 "%s at %L must be integer",
6958 _(name_msgid
), &expr
->where
);
6961 gfc_error ("%s at %L must be INTEGER", _(name_msgid
),
6968 gfc_error ("%s at %L must be INTEGER", _(name_msgid
), &expr
->where
);
6976 /* Resolve the expressions in an iterator structure. If REAL_OK is
6977 false allow only INTEGER type iterators, otherwise allow REAL types.
6978 Set own_scope to true for ac-implied-do and data-implied-do as those
6979 have a separate scope such that, e.g., a INTENT(IN) doesn't apply. */
6982 gfc_resolve_iterator (gfc_iterator
*iter
, bool real_ok
, bool own_scope
)
6984 if (!gfc_resolve_iterator_expr (iter
->var
, real_ok
, "Loop variable"))
6987 if (!gfc_check_vardef_context (iter
->var
, false, false, own_scope
,
6988 _("iterator variable")))
6991 if (!gfc_resolve_iterator_expr (iter
->start
, real_ok
,
6992 "Start expression in DO loop"))
6995 if (!gfc_resolve_iterator_expr (iter
->end
, real_ok
,
6996 "End expression in DO loop"))
6999 if (!gfc_resolve_iterator_expr (iter
->step
, real_ok
,
7000 "Step expression in DO loop"))
7003 if (iter
->step
->expr_type
== EXPR_CONSTANT
)
7005 if ((iter
->step
->ts
.type
== BT_INTEGER
7006 && mpz_cmp_ui (iter
->step
->value
.integer
, 0) == 0)
7007 || (iter
->step
->ts
.type
== BT_REAL
7008 && mpfr_sgn (iter
->step
->value
.real
) == 0))
7010 gfc_error ("Step expression in DO loop at %L cannot be zero",
7011 &iter
->step
->where
);
7016 /* Convert start, end, and step to the same type as var. */
7017 if (iter
->start
->ts
.kind
!= iter
->var
->ts
.kind
7018 || iter
->start
->ts
.type
!= iter
->var
->ts
.type
)
7019 gfc_convert_type (iter
->start
, &iter
->var
->ts
, 1);
7021 if (iter
->end
->ts
.kind
!= iter
->var
->ts
.kind
7022 || iter
->end
->ts
.type
!= iter
->var
->ts
.type
)
7023 gfc_convert_type (iter
->end
, &iter
->var
->ts
, 1);
7025 if (iter
->step
->ts
.kind
!= iter
->var
->ts
.kind
7026 || iter
->step
->ts
.type
!= iter
->var
->ts
.type
)
7027 gfc_convert_type (iter
->step
, &iter
->var
->ts
, 1);
7029 if (iter
->start
->expr_type
== EXPR_CONSTANT
7030 && iter
->end
->expr_type
== EXPR_CONSTANT
7031 && iter
->step
->expr_type
== EXPR_CONSTANT
)
7034 if (iter
->start
->ts
.type
== BT_INTEGER
)
7036 sgn
= mpz_cmp_ui (iter
->step
->value
.integer
, 0);
7037 cmp
= mpz_cmp (iter
->end
->value
.integer
, iter
->start
->value
.integer
);
7041 sgn
= mpfr_sgn (iter
->step
->value
.real
);
7042 cmp
= mpfr_cmp (iter
->end
->value
.real
, iter
->start
->value
.real
);
7044 if (warn_zerotrip
&& ((sgn
> 0 && cmp
< 0) || (sgn
< 0 && cmp
> 0)))
7045 gfc_warning (OPT_Wzerotrip
,
7046 "DO loop at %L will be executed zero times",
7047 &iter
->step
->where
);
7050 if (iter
->end
->expr_type
== EXPR_CONSTANT
7051 && iter
->end
->ts
.type
== BT_INTEGER
7052 && iter
->step
->expr_type
== EXPR_CONSTANT
7053 && iter
->step
->ts
.type
== BT_INTEGER
7054 && (mpz_cmp_si (iter
->step
->value
.integer
, -1L) == 0
7055 || mpz_cmp_si (iter
->step
->value
.integer
, 1L) == 0))
7057 bool is_step_positive
= mpz_cmp_ui (iter
->step
->value
.integer
, 1) == 0;
7058 int k
= gfc_validate_kind (BT_INTEGER
, iter
->end
->ts
.kind
, false);
7060 if (is_step_positive
7061 && mpz_cmp (iter
->end
->value
.integer
, gfc_integer_kinds
[k
].huge
) == 0)
7062 gfc_warning (OPT_Wundefined_do_loop
,
7063 "DO loop at %L is undefined as it overflows",
7064 &iter
->step
->where
);
7065 else if (!is_step_positive
7066 && mpz_cmp (iter
->end
->value
.integer
,
7067 gfc_integer_kinds
[k
].min_int
) == 0)
7068 gfc_warning (OPT_Wundefined_do_loop
,
7069 "DO loop at %L is undefined as it underflows",
7070 &iter
->step
->where
);
7077 /* Traversal function for find_forall_index. f == 2 signals that
7078 that variable itself is not to be checked - only the references. */
7081 forall_index (gfc_expr
*expr
, gfc_symbol
*sym
, int *f
)
7083 if (expr
->expr_type
!= EXPR_VARIABLE
)
7086 /* A scalar assignment */
7087 if (!expr
->ref
|| *f
== 1)
7089 if (expr
->symtree
->n
.sym
== sym
)
7101 /* Check whether the FORALL index appears in the expression or not.
7102 Returns true if SYM is found in EXPR. */
7105 find_forall_index (gfc_expr
*expr
, gfc_symbol
*sym
, int f
)
7107 if (gfc_traverse_expr (expr
, sym
, forall_index
, f
))
7114 /* Resolve a list of FORALL iterators. The FORALL index-name is constrained
7115 to be a scalar INTEGER variable. The subscripts and stride are scalar
7116 INTEGERs, and if stride is a constant it must be nonzero.
7117 Furthermore "A subscript or stride in a forall-triplet-spec shall
7118 not contain a reference to any index-name in the
7119 forall-triplet-spec-list in which it appears." (7.5.4.1) */
7122 resolve_forall_iterators (gfc_forall_iterator
*it
)
7124 gfc_forall_iterator
*iter
, *iter2
;
7126 for (iter
= it
; iter
; iter
= iter
->next
)
7128 if (gfc_resolve_expr (iter
->var
)
7129 && (iter
->var
->ts
.type
!= BT_INTEGER
|| iter
->var
->rank
!= 0))
7130 gfc_error ("FORALL index-name at %L must be a scalar INTEGER",
7133 if (gfc_resolve_expr (iter
->start
)
7134 && (iter
->start
->ts
.type
!= BT_INTEGER
|| iter
->start
->rank
!= 0))
7135 gfc_error ("FORALL start expression at %L must be a scalar INTEGER",
7136 &iter
->start
->where
);
7137 if (iter
->var
->ts
.kind
!= iter
->start
->ts
.kind
)
7138 gfc_convert_type (iter
->start
, &iter
->var
->ts
, 1);
7140 if (gfc_resolve_expr (iter
->end
)
7141 && (iter
->end
->ts
.type
!= BT_INTEGER
|| iter
->end
->rank
!= 0))
7142 gfc_error ("FORALL end expression at %L must be a scalar INTEGER",
7144 if (iter
->var
->ts
.kind
!= iter
->end
->ts
.kind
)
7145 gfc_convert_type (iter
->end
, &iter
->var
->ts
, 1);
7147 if (gfc_resolve_expr (iter
->stride
))
7149 if (iter
->stride
->ts
.type
!= BT_INTEGER
|| iter
->stride
->rank
!= 0)
7150 gfc_error ("FORALL stride expression at %L must be a scalar %s",
7151 &iter
->stride
->where
, "INTEGER");
7153 if (iter
->stride
->expr_type
== EXPR_CONSTANT
7154 && mpz_cmp_ui (iter
->stride
->value
.integer
, 0) == 0)
7155 gfc_error ("FORALL stride expression at %L cannot be zero",
7156 &iter
->stride
->where
);
7158 if (iter
->var
->ts
.kind
!= iter
->stride
->ts
.kind
)
7159 gfc_convert_type (iter
->stride
, &iter
->var
->ts
, 1);
7162 for (iter
= it
; iter
; iter
= iter
->next
)
7163 for (iter2
= iter
; iter2
; iter2
= iter2
->next
)
7165 if (find_forall_index (iter2
->start
, iter
->var
->symtree
->n
.sym
, 0)
7166 || find_forall_index (iter2
->end
, iter
->var
->symtree
->n
.sym
, 0)
7167 || find_forall_index (iter2
->stride
, iter
->var
->symtree
->n
.sym
, 0))
7168 gfc_error ("FORALL index %qs may not appear in triplet "
7169 "specification at %L", iter
->var
->symtree
->name
,
7170 &iter2
->start
->where
);
7175 /* Given a pointer to a symbol that is a derived type, see if it's
7176 inaccessible, i.e. if it's defined in another module and the components are
7177 PRIVATE. The search is recursive if necessary. Returns zero if no
7178 inaccessible components are found, nonzero otherwise. */
7181 derived_inaccessible (gfc_symbol
*sym
)
7185 if (sym
->attr
.use_assoc
&& sym
->attr
.private_comp
)
7188 for (c
= sym
->components
; c
; c
= c
->next
)
7190 /* Prevent an infinite loop through this function. */
7191 if (c
->ts
.type
== BT_DERIVED
&& c
->attr
.pointer
7192 && sym
== c
->ts
.u
.derived
)
7195 if (c
->ts
.type
== BT_DERIVED
&& derived_inaccessible (c
->ts
.u
.derived
))
7203 /* Resolve the argument of a deallocate expression. The expression must be
7204 a pointer or a full array. */
7207 resolve_deallocate_expr (gfc_expr
*e
)
7209 symbol_attribute attr
;
7210 int allocatable
, pointer
;
7216 if (!gfc_resolve_expr (e
))
7219 if (e
->expr_type
!= EXPR_VARIABLE
)
7222 sym
= e
->symtree
->n
.sym
;
7223 unlimited
= UNLIMITED_POLY(sym
);
7225 if (sym
->ts
.type
== BT_CLASS
)
7227 allocatable
= CLASS_DATA (sym
)->attr
.allocatable
;
7228 pointer
= CLASS_DATA (sym
)->attr
.class_pointer
;
7232 allocatable
= sym
->attr
.allocatable
;
7233 pointer
= sym
->attr
.pointer
;
7235 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
7240 if (ref
->u
.ar
.type
!= AR_FULL
7241 && !(ref
->u
.ar
.type
== AR_ELEMENT
&& ref
->u
.ar
.as
->rank
== 0
7242 && ref
->u
.ar
.codimen
&& gfc_ref_this_image (ref
)))
7247 c
= ref
->u
.c
.component
;
7248 if (c
->ts
.type
== BT_CLASS
)
7250 allocatable
= CLASS_DATA (c
)->attr
.allocatable
;
7251 pointer
= CLASS_DATA (c
)->attr
.class_pointer
;
7255 allocatable
= c
->attr
.allocatable
;
7256 pointer
= c
->attr
.pointer
;
7267 attr
= gfc_expr_attr (e
);
7269 if (allocatable
== 0 && attr
.pointer
== 0 && !unlimited
)
7272 gfc_error ("Allocate-object at %L must be ALLOCATABLE or a POINTER",
7278 if (gfc_is_coindexed (e
))
7280 gfc_error ("Coindexed allocatable object at %L", &e
->where
);
7285 && !gfc_check_vardef_context (e
, true, true, false,
7286 _("DEALLOCATE object")))
7288 if (!gfc_check_vardef_context (e
, false, true, false,
7289 _("DEALLOCATE object")))
7296 /* Returns true if the expression e contains a reference to the symbol sym. */
7298 sym_in_expr (gfc_expr
*e
, gfc_symbol
*sym
, int *f ATTRIBUTE_UNUSED
)
7300 if (e
->expr_type
== EXPR_VARIABLE
&& e
->symtree
->n
.sym
== sym
)
7307 gfc_find_sym_in_expr (gfc_symbol
*sym
, gfc_expr
*e
)
7309 return gfc_traverse_expr (e
, sym
, sym_in_expr
, 0);
7313 /* Given the expression node e for an allocatable/pointer of derived type to be
7314 allocated, get the expression node to be initialized afterwards (needed for
7315 derived types with default initializers, and derived types with allocatable
7316 components that need nullification.) */
7319 gfc_expr_to_initialize (gfc_expr
*e
)
7325 result
= gfc_copy_expr (e
);
7327 /* Change the last array reference from AR_ELEMENT to AR_FULL. */
7328 for (ref
= result
->ref
; ref
; ref
= ref
->next
)
7329 if (ref
->type
== REF_ARRAY
&& ref
->next
== NULL
)
7331 ref
->u
.ar
.type
= AR_FULL
;
7333 for (i
= 0; i
< ref
->u
.ar
.dimen
; i
++)
7334 ref
->u
.ar
.start
[i
] = ref
->u
.ar
.end
[i
] = ref
->u
.ar
.stride
[i
] = NULL
;
7339 gfc_free_shape (&result
->shape
, result
->rank
);
7341 /* Recalculate rank, shape, etc. */
7342 gfc_resolve_expr (result
);
7347 /* If the last ref of an expression is an array ref, return a copy of the
7348 expression with that one removed. Otherwise, a copy of the original
7349 expression. This is used for allocate-expressions and pointer assignment
7350 LHS, where there may be an array specification that needs to be stripped
7351 off when using gfc_check_vardef_context. */
7354 remove_last_array_ref (gfc_expr
* e
)
7359 e2
= gfc_copy_expr (e
);
7360 for (r
= &e2
->ref
; *r
; r
= &(*r
)->next
)
7361 if ((*r
)->type
== REF_ARRAY
&& !(*r
)->next
)
7363 gfc_free_ref_list (*r
);
7372 /* Used in resolve_allocate_expr to check that a allocation-object and
7373 a source-expr are conformable. This does not catch all possible
7374 cases; in particular a runtime checking is needed. */
7377 conformable_arrays (gfc_expr
*e1
, gfc_expr
*e2
)
7380 for (tail
= e2
->ref
; tail
&& tail
->next
; tail
= tail
->next
);
7382 /* First compare rank. */
7383 if ((tail
&& e1
->rank
!= tail
->u
.ar
.as
->rank
)
7384 || (!tail
&& e1
->rank
!= e2
->rank
))
7386 gfc_error ("Source-expr at %L must be scalar or have the "
7387 "same rank as the allocate-object at %L",
7388 &e1
->where
, &e2
->where
);
7399 for (i
= 0; i
< e1
->rank
; i
++)
7401 if (tail
->u
.ar
.start
[i
] == NULL
)
7404 if (tail
->u
.ar
.end
[i
])
7406 mpz_set (s
, tail
->u
.ar
.end
[i
]->value
.integer
);
7407 mpz_sub (s
, s
, tail
->u
.ar
.start
[i
]->value
.integer
);
7408 mpz_add_ui (s
, s
, 1);
7412 mpz_set (s
, tail
->u
.ar
.start
[i
]->value
.integer
);
7415 if (mpz_cmp (e1
->shape
[i
], s
) != 0)
7417 gfc_error ("Source-expr at %L and allocate-object at %L must "
7418 "have the same shape", &e1
->where
, &e2
->where
);
7431 /* Resolve the expression in an ALLOCATE statement, doing the additional
7432 checks to see whether the expression is OK or not. The expression must
7433 have a trailing array reference that gives the size of the array. */
7436 resolve_allocate_expr (gfc_expr
*e
, gfc_code
*code
, bool *array_alloc_wo_spec
)
7438 int i
, pointer
, allocatable
, dimension
, is_abstract
;
7442 symbol_attribute attr
;
7443 gfc_ref
*ref
, *ref2
;
7446 gfc_symbol
*sym
= NULL
;
7451 /* Mark the utmost array component as being in allocate to allow DIMEN_STAR
7452 checking of coarrays. */
7453 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
7454 if (ref
->next
== NULL
)
7457 if (ref
&& ref
->type
== REF_ARRAY
)
7458 ref
->u
.ar
.in_allocate
= true;
7460 if (!gfc_resolve_expr (e
))
7463 /* Make sure the expression is allocatable or a pointer. If it is
7464 pointer, the next-to-last reference must be a pointer. */
7468 sym
= e
->symtree
->n
.sym
;
7470 /* Check whether ultimate component is abstract and CLASS. */
7473 /* Is the allocate-object unlimited polymorphic? */
7474 unlimited
= UNLIMITED_POLY(e
);
7476 if (e
->expr_type
!= EXPR_VARIABLE
)
7479 attr
= gfc_expr_attr (e
);
7480 pointer
= attr
.pointer
;
7481 dimension
= attr
.dimension
;
7482 codimension
= attr
.codimension
;
7486 if (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
))
7488 allocatable
= CLASS_DATA (sym
)->attr
.allocatable
;
7489 pointer
= CLASS_DATA (sym
)->attr
.class_pointer
;
7490 dimension
= CLASS_DATA (sym
)->attr
.dimension
;
7491 codimension
= CLASS_DATA (sym
)->attr
.codimension
;
7492 is_abstract
= CLASS_DATA (sym
)->attr
.abstract
;
7496 allocatable
= sym
->attr
.allocatable
;
7497 pointer
= sym
->attr
.pointer
;
7498 dimension
= sym
->attr
.dimension
;
7499 codimension
= sym
->attr
.codimension
;
7504 for (ref
= e
->ref
; ref
; ref2
= ref
, ref
= ref
->next
)
7509 if (ref
->u
.ar
.codimen
> 0)
7512 for (n
= ref
->u
.ar
.dimen
;
7513 n
< ref
->u
.ar
.dimen
+ ref
->u
.ar
.codimen
; n
++)
7514 if (ref
->u
.ar
.dimen_type
[n
] != DIMEN_THIS_IMAGE
)
7521 if (ref
->next
!= NULL
)
7529 gfc_error ("Coindexed allocatable object at %L",
7534 c
= ref
->u
.c
.component
;
7535 if (c
->ts
.type
== BT_CLASS
)
7537 allocatable
= CLASS_DATA (c
)->attr
.allocatable
;
7538 pointer
= CLASS_DATA (c
)->attr
.class_pointer
;
7539 dimension
= CLASS_DATA (c
)->attr
.dimension
;
7540 codimension
= CLASS_DATA (c
)->attr
.codimension
;
7541 is_abstract
= CLASS_DATA (c
)->attr
.abstract
;
7545 allocatable
= c
->attr
.allocatable
;
7546 pointer
= c
->attr
.pointer
;
7547 dimension
= c
->attr
.dimension
;
7548 codimension
= c
->attr
.codimension
;
7549 is_abstract
= c
->attr
.abstract
;
7562 /* Check for F08:C628. */
7563 if (allocatable
== 0 && pointer
== 0 && !unlimited
)
7565 gfc_error ("Allocate-object at %L must be ALLOCATABLE or a POINTER",
7570 /* Some checks for the SOURCE tag. */
7573 /* Check F03:C631. */
7574 if (!gfc_type_compatible (&e
->ts
, &code
->expr3
->ts
))
7576 gfc_error ("Type of entity at %L is type incompatible with "
7577 "source-expr at %L", &e
->where
, &code
->expr3
->where
);
7581 /* Check F03:C632 and restriction following Note 6.18. */
7582 if (code
->expr3
->rank
> 0 && !conformable_arrays (code
->expr3
, e
))
7585 /* Check F03:C633. */
7586 if (code
->expr3
->ts
.kind
!= e
->ts
.kind
&& !unlimited
)
7588 gfc_error ("The allocate-object at %L and the source-expr at %L "
7589 "shall have the same kind type parameter",
7590 &e
->where
, &code
->expr3
->where
);
7594 /* Check F2008, C642. */
7595 if (code
->expr3
->ts
.type
== BT_DERIVED
7596 && ((codimension
&& gfc_expr_attr (code
->expr3
).lock_comp
)
7597 || (code
->expr3
->ts
.u
.derived
->from_intmod
7598 == INTMOD_ISO_FORTRAN_ENV
7599 && code
->expr3
->ts
.u
.derived
->intmod_sym_id
7600 == ISOFORTRAN_LOCK_TYPE
)))
7602 gfc_error ("The source-expr at %L shall neither be of type "
7603 "LOCK_TYPE nor have a LOCK_TYPE component if "
7604 "allocate-object at %L is a coarray",
7605 &code
->expr3
->where
, &e
->where
);
7609 /* Check TS18508, C702/C703. */
7610 if (code
->expr3
->ts
.type
== BT_DERIVED
7611 && ((codimension
&& gfc_expr_attr (code
->expr3
).event_comp
)
7612 || (code
->expr3
->ts
.u
.derived
->from_intmod
7613 == INTMOD_ISO_FORTRAN_ENV
7614 && code
->expr3
->ts
.u
.derived
->intmod_sym_id
7615 == ISOFORTRAN_EVENT_TYPE
)))
7617 gfc_error ("The source-expr at %L shall neither be of type "
7618 "EVENT_TYPE nor have a EVENT_TYPE component if "
7619 "allocate-object at %L is a coarray",
7620 &code
->expr3
->where
, &e
->where
);
7625 /* Check F08:C629. */
7626 if (is_abstract
&& code
->ext
.alloc
.ts
.type
== BT_UNKNOWN
7629 gcc_assert (e
->ts
.type
== BT_CLASS
);
7630 gfc_error ("Allocating %s of ABSTRACT base type at %L requires a "
7631 "type-spec or source-expr", sym
->name
, &e
->where
);
7635 /* Check F08:C632. */
7636 if (code
->ext
.alloc
.ts
.type
== BT_CHARACTER
&& !e
->ts
.deferred
7637 && !UNLIMITED_POLY (e
))
7641 if (!e
->ts
.u
.cl
->length
)
7644 cmp
= gfc_dep_compare_expr (e
->ts
.u
.cl
->length
,
7645 code
->ext
.alloc
.ts
.u
.cl
->length
);
7646 if (cmp
== 1 || cmp
== -1 || cmp
== -3)
7648 gfc_error ("Allocating %s at %L with type-spec requires the same "
7649 "character-length parameter as in the declaration",
7650 sym
->name
, &e
->where
);
7655 /* In the variable definition context checks, gfc_expr_attr is used
7656 on the expression. This is fooled by the array specification
7657 present in e, thus we have to eliminate that one temporarily. */
7658 e2
= remove_last_array_ref (e
);
7661 t
= gfc_check_vardef_context (e2
, true, true, false,
7662 _("ALLOCATE object"));
7664 t
= gfc_check_vardef_context (e2
, false, true, false,
7665 _("ALLOCATE object"));
7670 if (e
->ts
.type
== BT_CLASS
&& CLASS_DATA (e
)->attr
.dimension
7671 && !code
->expr3
&& code
->ext
.alloc
.ts
.type
== BT_DERIVED
)
7673 /* For class arrays, the initialization with SOURCE is done
7674 using _copy and trans_call. It is convenient to exploit that
7675 when the allocated type is different from the declared type but
7676 no SOURCE exists by setting expr3. */
7677 code
->expr3
= gfc_default_initializer (&code
->ext
.alloc
.ts
);
7679 else if (flag_coarray
!= GFC_FCOARRAY_LIB
&& e
->ts
.type
== BT_DERIVED
7680 && e
->ts
.u
.derived
->from_intmod
== INTMOD_ISO_FORTRAN_ENV
7681 && e
->ts
.u
.derived
->intmod_sym_id
== ISOFORTRAN_EVENT_TYPE
)
7683 /* We have to zero initialize the integer variable. */
7684 code
->expr3
= gfc_get_int_expr (gfc_default_integer_kind
, &e
->where
, 0);
7687 if (e
->ts
.type
== BT_CLASS
&& !unlimited
&& !UNLIMITED_POLY (code
->expr3
))
7689 /* Make sure the vtab symbol is present when
7690 the module variables are generated. */
7691 gfc_typespec ts
= e
->ts
;
7693 ts
= code
->expr3
->ts
;
7694 else if (code
->ext
.alloc
.ts
.type
== BT_DERIVED
)
7695 ts
= code
->ext
.alloc
.ts
;
7697 /* Finding the vtab also publishes the type's symbol. Therefore this
7698 statement is necessary. */
7699 gfc_find_derived_vtab (ts
.u
.derived
);
7701 else if (unlimited
&& !UNLIMITED_POLY (code
->expr3
))
7703 /* Again, make sure the vtab symbol is present when
7704 the module variables are generated. */
7705 gfc_typespec
*ts
= NULL
;
7707 ts
= &code
->expr3
->ts
;
7709 ts
= &code
->ext
.alloc
.ts
;
7713 /* Finding the vtab also publishes the type's symbol. Therefore this
7714 statement is necessary. */
7718 if (dimension
== 0 && codimension
== 0)
7721 /* Make sure the last reference node is an array specification. */
7723 if (!ref2
|| ref2
->type
!= REF_ARRAY
|| ref2
->u
.ar
.type
== AR_FULL
7724 || (dimension
&& ref2
->u
.ar
.dimen
== 0))
7729 if (!gfc_notify_std (GFC_STD_F2008
, "Array specification required "
7730 "in ALLOCATE statement at %L", &e
->where
))
7732 if (code
->expr3
->rank
!= 0)
7733 *array_alloc_wo_spec
= true;
7736 gfc_error ("Array specification or array-valued SOURCE= "
7737 "expression required in ALLOCATE statement at %L",
7744 gfc_error ("Array specification required in ALLOCATE statement "
7745 "at %L", &e
->where
);
7750 /* Make sure that the array section reference makes sense in the
7751 context of an ALLOCATE specification. */
7756 for (i
= ar
->dimen
; i
< ar
->dimen
+ ar
->codimen
; i
++)
7757 if (ar
->dimen_type
[i
] == DIMEN_THIS_IMAGE
)
7759 gfc_error ("Coarray specification required in ALLOCATE statement "
7760 "at %L", &e
->where
);
7764 for (i
= 0; i
< ar
->dimen
; i
++)
7766 if (ar
->type
== AR_ELEMENT
|| ar
->type
== AR_FULL
)
7769 switch (ar
->dimen_type
[i
])
7775 if (ar
->start
[i
] != NULL
7776 && ar
->end
[i
] != NULL
7777 && ar
->stride
[i
] == NULL
)
7785 case DIMEN_THIS_IMAGE
:
7786 gfc_error ("Bad array specification in ALLOCATE statement at %L",
7792 for (a
= code
->ext
.alloc
.list
; a
; a
= a
->next
)
7794 sym
= a
->expr
->symtree
->n
.sym
;
7796 /* TODO - check derived type components. */
7797 if (gfc_bt_struct (sym
->ts
.type
) || sym
->ts
.type
== BT_CLASS
)
7800 if ((ar
->start
[i
] != NULL
7801 && gfc_find_sym_in_expr (sym
, ar
->start
[i
]))
7802 || (ar
->end
[i
] != NULL
7803 && gfc_find_sym_in_expr (sym
, ar
->end
[i
])))
7805 gfc_error ("%qs must not appear in the array specification at "
7806 "%L in the same ALLOCATE statement where it is "
7807 "itself allocated", sym
->name
, &ar
->where
);
7813 for (i
= ar
->dimen
; i
< ar
->codimen
+ ar
->dimen
; i
++)
7815 if (ar
->dimen_type
[i
] == DIMEN_ELEMENT
7816 || ar
->dimen_type
[i
] == DIMEN_RANGE
)
7818 if (i
== (ar
->dimen
+ ar
->codimen
- 1))
7820 gfc_error ("Expected '*' in coindex specification in ALLOCATE "
7821 "statement at %L", &e
->where
);
7827 if (ar
->dimen_type
[i
] == DIMEN_STAR
&& i
== (ar
->dimen
+ ar
->codimen
- 1)
7828 && ar
->stride
[i
] == NULL
)
7831 gfc_error ("Bad coarray specification in ALLOCATE statement at %L",
7845 resolve_allocate_deallocate (gfc_code
*code
, const char *fcn
)
7847 gfc_expr
*stat
, *errmsg
, *pe
, *qe
;
7848 gfc_alloc
*a
, *p
, *q
;
7851 errmsg
= code
->expr2
;
7853 /* Check the stat variable. */
7856 gfc_check_vardef_context (stat
, false, false, false,
7857 _("STAT variable"));
7859 if ((stat
->ts
.type
!= BT_INTEGER
7860 && !(stat
->ref
&& (stat
->ref
->type
== REF_ARRAY
7861 || stat
->ref
->type
== REF_COMPONENT
)))
7863 gfc_error ("Stat-variable at %L must be a scalar INTEGER "
7864 "variable", &stat
->where
);
7866 for (p
= code
->ext
.alloc
.list
; p
; p
= p
->next
)
7867 if (p
->expr
->symtree
->n
.sym
->name
== stat
->symtree
->n
.sym
->name
)
7869 gfc_ref
*ref1
, *ref2
;
7872 for (ref1
= p
->expr
->ref
, ref2
= stat
->ref
; ref1
&& ref2
;
7873 ref1
= ref1
->next
, ref2
= ref2
->next
)
7875 if (ref1
->type
!= REF_COMPONENT
|| ref2
->type
!= REF_COMPONENT
)
7877 if (ref1
->u
.c
.component
->name
!= ref2
->u
.c
.component
->name
)
7886 gfc_error ("Stat-variable at %L shall not be %sd within "
7887 "the same %s statement", &stat
->where
, fcn
, fcn
);
7893 /* Check the errmsg variable. */
7897 gfc_warning (0, "ERRMSG at %L is useless without a STAT tag",
7900 gfc_check_vardef_context (errmsg
, false, false, false,
7901 _("ERRMSG variable"));
7903 /* F18:R928 alloc-opt is ERRMSG = errmsg-variable
7904 F18:R930 errmsg-variable is scalar-default-char-variable
7905 F18:R906 default-char-variable is variable
7906 F18:C906 default-char-variable shall be default character. */
7907 if ((errmsg
->ts
.type
!= BT_CHARACTER
7909 && (errmsg
->ref
->type
== REF_ARRAY
7910 || errmsg
->ref
->type
== REF_COMPONENT
)))
7912 || errmsg
->ts
.kind
!= gfc_default_character_kind
)
7913 gfc_error ("ERRMSG variable at %L shall be a scalar default CHARACTER "
7914 "variable", &errmsg
->where
);
7916 for (p
= code
->ext
.alloc
.list
; p
; p
= p
->next
)
7917 if (p
->expr
->symtree
->n
.sym
->name
== errmsg
->symtree
->n
.sym
->name
)
7919 gfc_ref
*ref1
, *ref2
;
7922 for (ref1
= p
->expr
->ref
, ref2
= errmsg
->ref
; ref1
&& ref2
;
7923 ref1
= ref1
->next
, ref2
= ref2
->next
)
7925 if (ref1
->type
!= REF_COMPONENT
|| ref2
->type
!= REF_COMPONENT
)
7927 if (ref1
->u
.c
.component
->name
!= ref2
->u
.c
.component
->name
)
7936 gfc_error ("Errmsg-variable at %L shall not be %sd within "
7937 "the same %s statement", &errmsg
->where
, fcn
, fcn
);
7943 /* Check that an allocate-object appears only once in the statement. */
7945 for (p
= code
->ext
.alloc
.list
; p
; p
= p
->next
)
7948 for (q
= p
->next
; q
; q
= q
->next
)
7951 if (pe
->symtree
->n
.sym
->name
== qe
->symtree
->n
.sym
->name
)
7953 /* This is a potential collision. */
7954 gfc_ref
*pr
= pe
->ref
;
7955 gfc_ref
*qr
= qe
->ref
;
7957 /* Follow the references until
7958 a) They start to differ, in which case there is no error;
7959 you can deallocate a%b and a%c in a single statement
7960 b) Both of them stop, which is an error
7961 c) One of them stops, which is also an error. */
7964 if (pr
== NULL
&& qr
== NULL
)
7966 gfc_error ("Allocate-object at %L also appears at %L",
7967 &pe
->where
, &qe
->where
);
7970 else if (pr
!= NULL
&& qr
== NULL
)
7972 gfc_error ("Allocate-object at %L is subobject of"
7973 " object at %L", &pe
->where
, &qe
->where
);
7976 else if (pr
== NULL
&& qr
!= NULL
)
7978 gfc_error ("Allocate-object at %L is subobject of"
7979 " object at %L", &qe
->where
, &pe
->where
);
7982 /* Here, pr != NULL && qr != NULL */
7983 gcc_assert(pr
->type
== qr
->type
);
7984 if (pr
->type
== REF_ARRAY
)
7986 /* Handle cases like allocate(v(3)%x(3), v(2)%x(3)),
7988 gcc_assert (qr
->type
== REF_ARRAY
);
7990 if (pr
->next
&& qr
->next
)
7993 gfc_array_ref
*par
= &(pr
->u
.ar
);
7994 gfc_array_ref
*qar
= &(qr
->u
.ar
);
7996 for (i
=0; i
<par
->dimen
; i
++)
7998 if ((par
->start
[i
] != NULL
7999 || qar
->start
[i
] != NULL
)
8000 && gfc_dep_compare_expr (par
->start
[i
],
8001 qar
->start
[i
]) != 0)
8008 if (pr
->u
.c
.component
->name
!= qr
->u
.c
.component
->name
)
8021 if (strcmp (fcn
, "ALLOCATE") == 0)
8023 bool arr_alloc_wo_spec
= false;
8025 /* Resolving the expr3 in the loop over all objects to allocate would
8026 execute loop invariant code for each loop item. Therefore do it just
8028 if (code
->expr3
&& code
->expr3
->mold
8029 && code
->expr3
->ts
.type
== BT_DERIVED
)
8031 /* Default initialization via MOLD (non-polymorphic). */
8032 gfc_expr
*rhs
= gfc_default_initializer (&code
->expr3
->ts
);
8035 gfc_resolve_expr (rhs
);
8036 gfc_free_expr (code
->expr3
);
8040 for (a
= code
->ext
.alloc
.list
; a
; a
= a
->next
)
8041 resolve_allocate_expr (a
->expr
, code
, &arr_alloc_wo_spec
);
8043 if (arr_alloc_wo_spec
&& code
->expr3
)
8045 /* Mark the allocate to have to take the array specification
8047 code
->ext
.alloc
.arr_spec_from_expr3
= 1;
8052 for (a
= code
->ext
.alloc
.list
; a
; a
= a
->next
)
8053 resolve_deallocate_expr (a
->expr
);
8058 /************ SELECT CASE resolution subroutines ************/
8060 /* Callback function for our mergesort variant. Determines interval
8061 overlaps for CASEs. Return <0 if op1 < op2, 0 for overlap, >0 for
8062 op1 > op2. Assumes we're not dealing with the default case.
8063 We have op1 = (:L), (K:L) or (K:) and op2 = (:N), (M:N) or (M:).
8064 There are nine situations to check. */
8067 compare_cases (const gfc_case
*op1
, const gfc_case
*op2
)
8071 if (op1
->low
== NULL
) /* op1 = (:L) */
8073 /* op2 = (:N), so overlap. */
8075 /* op2 = (M:) or (M:N), L < M */
8076 if (op2
->low
!= NULL
8077 && gfc_compare_expr (op1
->high
, op2
->low
, INTRINSIC_LT
) < 0)
8080 else if (op1
->high
== NULL
) /* op1 = (K:) */
8082 /* op2 = (M:), so overlap. */
8084 /* op2 = (:N) or (M:N), K > N */
8085 if (op2
->high
!= NULL
8086 && gfc_compare_expr (op1
->low
, op2
->high
, INTRINSIC_GT
) > 0)
8089 else /* op1 = (K:L) */
8091 if (op2
->low
== NULL
) /* op2 = (:N), K > N */
8092 retval
= (gfc_compare_expr (op1
->low
, op2
->high
, INTRINSIC_GT
) > 0)
8094 else if (op2
->high
== NULL
) /* op2 = (M:), L < M */
8095 retval
= (gfc_compare_expr (op1
->high
, op2
->low
, INTRINSIC_LT
) < 0)
8097 else /* op2 = (M:N) */
8101 if (gfc_compare_expr (op1
->high
, op2
->low
, INTRINSIC_LT
) < 0)
8104 else if (gfc_compare_expr (op1
->low
, op2
->high
, INTRINSIC_GT
) > 0)
8113 /* Merge-sort a double linked case list, detecting overlap in the
8114 process. LIST is the head of the double linked case list before it
8115 is sorted. Returns the head of the sorted list if we don't see any
8116 overlap, or NULL otherwise. */
8119 check_case_overlap (gfc_case
*list
)
8121 gfc_case
*p
, *q
, *e
, *tail
;
8122 int insize
, nmerges
, psize
, qsize
, cmp
, overlap_seen
;
8124 /* If the passed list was empty, return immediately. */
8131 /* Loop unconditionally. The only exit from this loop is a return
8132 statement, when we've finished sorting the case list. */
8139 /* Count the number of merges we do in this pass. */
8142 /* Loop while there exists a merge to be done. */
8147 /* Count this merge. */
8150 /* Cut the list in two pieces by stepping INSIZE places
8151 forward in the list, starting from P. */
8154 for (i
= 0; i
< insize
; i
++)
8163 /* Now we have two lists. Merge them! */
8164 while (psize
> 0 || (qsize
> 0 && q
!= NULL
))
8166 /* See from which the next case to merge comes from. */
8169 /* P is empty so the next case must come from Q. */
8174 else if (qsize
== 0 || q
== NULL
)
8183 cmp
= compare_cases (p
, q
);
8186 /* The whole case range for P is less than the
8194 /* The whole case range for Q is greater than
8195 the case range for P. */
8202 /* The cases overlap, or they are the same
8203 element in the list. Either way, we must
8204 issue an error and get the next case from P. */
8205 /* FIXME: Sort P and Q by line number. */
8206 gfc_error ("CASE label at %L overlaps with CASE "
8207 "label at %L", &p
->where
, &q
->where
);
8215 /* Add the next element to the merged list. */
8224 /* P has now stepped INSIZE places along, and so has Q. So
8225 they're the same. */
8230 /* If we have done only one merge or none at all, we've
8231 finished sorting the cases. */
8240 /* Otherwise repeat, merging lists twice the size. */
8246 /* Check to see if an expression is suitable for use in a CASE statement.
8247 Makes sure that all case expressions are scalar constants of the same
8248 type. Return false if anything is wrong. */
8251 validate_case_label_expr (gfc_expr
*e
, gfc_expr
*case_expr
)
8253 if (e
== NULL
) return true;
8255 if (e
->ts
.type
!= case_expr
->ts
.type
)
8257 gfc_error ("Expression in CASE statement at %L must be of type %s",
8258 &e
->where
, gfc_basic_typename (case_expr
->ts
.type
));
8262 /* C805 (R808) For a given case-construct, each case-value shall be of
8263 the same type as case-expr. For character type, length differences
8264 are allowed, but the kind type parameters shall be the same. */
8266 if (case_expr
->ts
.type
== BT_CHARACTER
&& e
->ts
.kind
!= case_expr
->ts
.kind
)
8268 gfc_error ("Expression in CASE statement at %L must be of kind %d",
8269 &e
->where
, case_expr
->ts
.kind
);
8273 /* Convert the case value kind to that of case expression kind,
8276 if (e
->ts
.kind
!= case_expr
->ts
.kind
)
8277 gfc_convert_type_warn (e
, &case_expr
->ts
, 2, 0);
8281 gfc_error ("Expression in CASE statement at %L must be scalar",
8290 /* Given a completely parsed select statement, we:
8292 - Validate all expressions and code within the SELECT.
8293 - Make sure that the selection expression is not of the wrong type.
8294 - Make sure that no case ranges overlap.
8295 - Eliminate unreachable cases and unreachable code resulting from
8296 removing case labels.
8298 The standard does allow unreachable cases, e.g. CASE (5:3). But
8299 they are a hassle for code generation, and to prevent that, we just
8300 cut them out here. This is not necessary for overlapping cases
8301 because they are illegal and we never even try to generate code.
8303 We have the additional caveat that a SELECT construct could have
8304 been a computed GOTO in the source code. Fortunately we can fairly
8305 easily work around that here: The case_expr for a "real" SELECT CASE
8306 is in code->expr1, but for a computed GOTO it is in code->expr2. All
8307 we have to do is make sure that the case_expr is a scalar integer
8311 resolve_select (gfc_code
*code
, bool select_type
)
8314 gfc_expr
*case_expr
;
8315 gfc_case
*cp
, *default_case
, *tail
, *head
;
8316 int seen_unreachable
;
8322 if (code
->expr1
== NULL
)
8324 /* This was actually a computed GOTO statement. */
8325 case_expr
= code
->expr2
;
8326 if (case_expr
->ts
.type
!= BT_INTEGER
|| case_expr
->rank
!= 0)
8327 gfc_error ("Selection expression in computed GOTO statement "
8328 "at %L must be a scalar integer expression",
8331 /* Further checking is not necessary because this SELECT was built
8332 by the compiler, so it should always be OK. Just move the
8333 case_expr from expr2 to expr so that we can handle computed
8334 GOTOs as normal SELECTs from here on. */
8335 code
->expr1
= code
->expr2
;
8340 case_expr
= code
->expr1
;
8341 type
= case_expr
->ts
.type
;
8344 if (type
!= BT_LOGICAL
&& type
!= BT_INTEGER
&& type
!= BT_CHARACTER
)
8346 gfc_error ("Argument of SELECT statement at %L cannot be %s",
8347 &case_expr
->where
, gfc_typename (&case_expr
->ts
));
8349 /* Punt. Going on here just produce more garbage error messages. */
8354 if (!select_type
&& case_expr
->rank
!= 0)
8356 gfc_error ("Argument of SELECT statement at %L must be a scalar "
8357 "expression", &case_expr
->where
);
8363 /* Raise a warning if an INTEGER case value exceeds the range of
8364 the case-expr. Later, all expressions will be promoted to the
8365 largest kind of all case-labels. */
8367 if (type
== BT_INTEGER
)
8368 for (body
= code
->block
; body
; body
= body
->block
)
8369 for (cp
= body
->ext
.block
.case_list
; cp
; cp
= cp
->next
)
8372 && gfc_check_integer_range (cp
->low
->value
.integer
,
8373 case_expr
->ts
.kind
) != ARITH_OK
)
8374 gfc_warning (0, "Expression in CASE statement at %L is "
8375 "not in the range of %s", &cp
->low
->where
,
8376 gfc_typename (&case_expr
->ts
));
8379 && cp
->low
!= cp
->high
8380 && gfc_check_integer_range (cp
->high
->value
.integer
,
8381 case_expr
->ts
.kind
) != ARITH_OK
)
8382 gfc_warning (0, "Expression in CASE statement at %L is "
8383 "not in the range of %s", &cp
->high
->where
,
8384 gfc_typename (&case_expr
->ts
));
8387 /* PR 19168 has a long discussion concerning a mismatch of the kinds
8388 of the SELECT CASE expression and its CASE values. Walk the lists
8389 of case values, and if we find a mismatch, promote case_expr to
8390 the appropriate kind. */
8392 if (type
== BT_LOGICAL
|| type
== BT_INTEGER
)
8394 for (body
= code
->block
; body
; body
= body
->block
)
8396 /* Walk the case label list. */
8397 for (cp
= body
->ext
.block
.case_list
; cp
; cp
= cp
->next
)
8399 /* Intercept the DEFAULT case. It does not have a kind. */
8400 if (cp
->low
== NULL
&& cp
->high
== NULL
)
8403 /* Unreachable case ranges are discarded, so ignore. */
8404 if (cp
->low
!= NULL
&& cp
->high
!= NULL
8405 && cp
->low
!= cp
->high
8406 && gfc_compare_expr (cp
->low
, cp
->high
, INTRINSIC_GT
) > 0)
8410 && case_expr
->ts
.kind
!= gfc_kind_max(case_expr
, cp
->low
))
8411 gfc_convert_type_warn (case_expr
, &cp
->low
->ts
, 2, 0);
8413 if (cp
->high
!= NULL
8414 && case_expr
->ts
.kind
!= gfc_kind_max(case_expr
, cp
->high
))
8415 gfc_convert_type_warn (case_expr
, &cp
->high
->ts
, 2, 0);
8420 /* Assume there is no DEFAULT case. */
8421 default_case
= NULL
;
8426 for (body
= code
->block
; body
; body
= body
->block
)
8428 /* Assume the CASE list is OK, and all CASE labels can be matched. */
8430 seen_unreachable
= 0;
8432 /* Walk the case label list, making sure that all case labels
8434 for (cp
= body
->ext
.block
.case_list
; cp
; cp
= cp
->next
)
8436 /* Count the number of cases in the whole construct. */
8439 /* Intercept the DEFAULT case. */
8440 if (cp
->low
== NULL
&& cp
->high
== NULL
)
8442 if (default_case
!= NULL
)
8444 gfc_error ("The DEFAULT CASE at %L cannot be followed "
8445 "by a second DEFAULT CASE at %L",
8446 &default_case
->where
, &cp
->where
);
8457 /* Deal with single value cases and case ranges. Errors are
8458 issued from the validation function. */
8459 if (!validate_case_label_expr (cp
->low
, case_expr
)
8460 || !validate_case_label_expr (cp
->high
, case_expr
))
8466 if (type
== BT_LOGICAL
8467 && ((cp
->low
== NULL
|| cp
->high
== NULL
)
8468 || cp
->low
!= cp
->high
))
8470 gfc_error ("Logical range in CASE statement at %L is not "
8471 "allowed", &cp
->low
->where
);
8476 if (type
== BT_LOGICAL
&& cp
->low
->expr_type
== EXPR_CONSTANT
)
8479 value
= cp
->low
->value
.logical
== 0 ? 2 : 1;
8480 if (value
& seen_logical
)
8482 gfc_error ("Constant logical value in CASE statement "
8483 "is repeated at %L",
8488 seen_logical
|= value
;
8491 if (cp
->low
!= NULL
&& cp
->high
!= NULL
8492 && cp
->low
!= cp
->high
8493 && gfc_compare_expr (cp
->low
, cp
->high
, INTRINSIC_GT
) > 0)
8495 if (warn_surprising
)
8496 gfc_warning (OPT_Wsurprising
,
8497 "Range specification at %L can never be matched",
8500 cp
->unreachable
= 1;
8501 seen_unreachable
= 1;
8505 /* If the case range can be matched, it can also overlap with
8506 other cases. To make sure it does not, we put it in a
8507 double linked list here. We sort that with a merge sort
8508 later on to detect any overlapping cases. */
8512 head
->right
= head
->left
= NULL
;
8517 tail
->right
->left
= tail
;
8524 /* It there was a failure in the previous case label, give up
8525 for this case label list. Continue with the next block. */
8529 /* See if any case labels that are unreachable have been seen.
8530 If so, we eliminate them. This is a bit of a kludge because
8531 the case lists for a single case statement (label) is a
8532 single forward linked lists. */
8533 if (seen_unreachable
)
8535 /* Advance until the first case in the list is reachable. */
8536 while (body
->ext
.block
.case_list
!= NULL
8537 && body
->ext
.block
.case_list
->unreachable
)
8539 gfc_case
*n
= body
->ext
.block
.case_list
;
8540 body
->ext
.block
.case_list
= body
->ext
.block
.case_list
->next
;
8542 gfc_free_case_list (n
);
8545 /* Strip all other unreachable cases. */
8546 if (body
->ext
.block
.case_list
)
8548 for (cp
= body
->ext
.block
.case_list
; cp
&& cp
->next
; cp
= cp
->next
)
8550 if (cp
->next
->unreachable
)
8552 gfc_case
*n
= cp
->next
;
8553 cp
->next
= cp
->next
->next
;
8555 gfc_free_case_list (n
);
8562 /* See if there were overlapping cases. If the check returns NULL,
8563 there was overlap. In that case we don't do anything. If head
8564 is non-NULL, we prepend the DEFAULT case. The sorted list can
8565 then used during code generation for SELECT CASE constructs with
8566 a case expression of a CHARACTER type. */
8569 head
= check_case_overlap (head
);
8571 /* Prepend the default_case if it is there. */
8572 if (head
!= NULL
&& default_case
)
8574 default_case
->left
= NULL
;
8575 default_case
->right
= head
;
8576 head
->left
= default_case
;
8580 /* Eliminate dead blocks that may be the result if we've seen
8581 unreachable case labels for a block. */
8582 for (body
= code
; body
&& body
->block
; body
= body
->block
)
8584 if (body
->block
->ext
.block
.case_list
== NULL
)
8586 /* Cut the unreachable block from the code chain. */
8587 gfc_code
*c
= body
->block
;
8588 body
->block
= c
->block
;
8590 /* Kill the dead block, but not the blocks below it. */
8592 gfc_free_statements (c
);
8596 /* More than two cases is legal but insane for logical selects.
8597 Issue a warning for it. */
8598 if (warn_surprising
&& type
== BT_LOGICAL
&& ncases
> 2)
8599 gfc_warning (OPT_Wsurprising
,
8600 "Logical SELECT CASE block at %L has more that two cases",
8605 /* Check if a derived type is extensible. */
8608 gfc_type_is_extensible (gfc_symbol
*sym
)
8610 return !(sym
->attr
.is_bind_c
|| sym
->attr
.sequence
8611 || (sym
->attr
.is_class
8612 && sym
->components
->ts
.u
.derived
->attr
.unlimited_polymorphic
));
8617 resolve_types (gfc_namespace
*ns
);
8619 /* Resolve an associate-name: Resolve target and ensure the type-spec is
8620 correct as well as possibly the array-spec. */
8623 resolve_assoc_var (gfc_symbol
* sym
, bool resolve_target
)
8627 gcc_assert (sym
->assoc
);
8628 gcc_assert (sym
->attr
.flavor
== FL_VARIABLE
);
8630 /* If this is for SELECT TYPE, the target may not yet be set. In that
8631 case, return. Resolution will be called later manually again when
8633 target
= sym
->assoc
->target
;
8636 gcc_assert (!sym
->assoc
->dangling
);
8638 if (resolve_target
&& !gfc_resolve_expr (target
))
8641 /* For variable targets, we get some attributes from the target. */
8642 if (target
->expr_type
== EXPR_VARIABLE
)
8646 gcc_assert (target
->symtree
);
8647 tsym
= target
->symtree
->n
.sym
;
8649 sym
->attr
.asynchronous
= tsym
->attr
.asynchronous
;
8650 sym
->attr
.volatile_
= tsym
->attr
.volatile_
;
8652 sym
->attr
.target
= tsym
->attr
.target
8653 || gfc_expr_attr (target
).pointer
;
8654 if (is_subref_array (target
))
8655 sym
->attr
.subref_array_pointer
= 1;
8658 if (target
->expr_type
== EXPR_NULL
)
8660 gfc_error ("Selector at %L cannot be NULL()", &target
->where
);
8663 else if (target
->ts
.type
== BT_UNKNOWN
)
8665 gfc_error ("Selector at %L has no type", &target
->where
);
8669 /* Get type if this was not already set. Note that it can be
8670 some other type than the target in case this is a SELECT TYPE
8671 selector! So we must not update when the type is already there. */
8672 if (sym
->ts
.type
== BT_UNKNOWN
)
8673 sym
->ts
= target
->ts
;
8675 gcc_assert (sym
->ts
.type
!= BT_UNKNOWN
);
8677 /* See if this is a valid association-to-variable. */
8678 sym
->assoc
->variable
= (target
->expr_type
== EXPR_VARIABLE
8679 && !gfc_has_vector_subscript (target
));
8681 /* Finally resolve if this is an array or not. */
8682 if (sym
->attr
.dimension
&& target
->rank
== 0)
8684 /* primary.c makes the assumption that a reference to an associate
8685 name followed by a left parenthesis is an array reference. */
8686 if (sym
->ts
.type
!= BT_CHARACTER
)
8687 gfc_error ("Associate-name %qs at %L is used as array",
8688 sym
->name
, &sym
->declared_at
);
8689 sym
->attr
.dimension
= 0;
8694 /* We cannot deal with class selectors that need temporaries. */
8695 if (target
->ts
.type
== BT_CLASS
8696 && gfc_ref_needs_temporary_p (target
->ref
))
8698 gfc_error ("CLASS selector at %L needs a temporary which is not "
8699 "yet implemented", &target
->where
);
8703 if (target
->ts
.type
== BT_CLASS
)
8704 gfc_fix_class_refs (target
);
8706 if (target
->rank
!= 0)
8709 /* The rank may be incorrectly guessed at parsing, therefore make sure
8710 it is corrected now. */
8711 if (sym
->ts
.type
!= BT_CLASS
&& (!sym
->as
|| sym
->assoc
->rankguessed
))
8714 sym
->as
= gfc_get_array_spec ();
8716 as
->rank
= target
->rank
;
8717 as
->type
= AS_DEFERRED
;
8718 as
->corank
= gfc_get_corank (target
);
8719 sym
->attr
.dimension
= 1;
8720 if (as
->corank
!= 0)
8721 sym
->attr
.codimension
= 1;
8723 else if (sym
->ts
.type
== BT_CLASS
&& (!CLASS_DATA (sym
)->as
|| sym
->assoc
->rankguessed
))
8725 if (!CLASS_DATA (sym
)->as
)
8726 CLASS_DATA (sym
)->as
= gfc_get_array_spec ();
8727 as
= CLASS_DATA (sym
)->as
;
8728 as
->rank
= target
->rank
;
8729 as
->type
= AS_DEFERRED
;
8730 as
->corank
= gfc_get_corank (target
);
8731 CLASS_DATA (sym
)->attr
.dimension
= 1;
8732 if (as
->corank
!= 0)
8733 CLASS_DATA (sym
)->attr
.codimension
= 1;
8738 /* target's rank is 0, but the type of the sym is still array valued,
8739 which has to be corrected. */
8740 if (sym
->ts
.type
== BT_CLASS
8741 && CLASS_DATA (sym
) && CLASS_DATA (sym
)->as
)
8744 symbol_attribute attr
;
8745 /* The associated variable's type is still the array type
8746 correct this now. */
8747 gfc_typespec
*ts
= &target
->ts
;
8750 for (ref
= target
->ref
; ref
!= NULL
; ref
= ref
->next
)
8755 ts
= &ref
->u
.c
.component
->ts
;
8758 if (ts
->type
== BT_CLASS
)
8759 ts
= &ts
->u
.derived
->components
->ts
;
8765 /* Create a scalar instance of the current class type. Because the
8766 rank of a class array goes into its name, the type has to be
8767 rebuild. The alternative of (re-)setting just the attributes
8768 and as in the current type, destroys the type also in other
8772 sym
->ts
.type
= BT_CLASS
;
8773 attr
= CLASS_DATA (sym
)->attr
;
8775 attr
.associate_var
= 1;
8776 attr
.dimension
= attr
.codimension
= 0;
8777 attr
.class_pointer
= 1;
8778 if (!gfc_build_class_symbol (&sym
->ts
, &attr
, &as
))
8780 /* Make sure the _vptr is set. */
8781 c
= gfc_find_component (sym
->ts
.u
.derived
, "_vptr", true, true, NULL
);
8782 if (c
->ts
.u
.derived
== NULL
)
8783 c
->ts
.u
.derived
= gfc_find_derived_vtab (sym
->ts
.u
.derived
);
8784 CLASS_DATA (sym
)->attr
.pointer
= 1;
8785 CLASS_DATA (sym
)->attr
.class_pointer
= 1;
8786 gfc_set_sym_referenced (sym
->ts
.u
.derived
);
8787 gfc_commit_symbol (sym
->ts
.u
.derived
);
8788 /* _vptr now has the _vtab in it, change it to the _vtype. */
8789 if (c
->ts
.u
.derived
->attr
.vtab
)
8790 c
->ts
.u
.derived
= c
->ts
.u
.derived
->ts
.u
.derived
;
8791 c
->ts
.u
.derived
->ns
->types_resolved
= 0;
8792 resolve_types (c
->ts
.u
.derived
->ns
);
8796 /* Mark this as an associate variable. */
8797 sym
->attr
.associate_var
= 1;
8799 /* Fix up the type-spec for CHARACTER types. */
8800 if (sym
->ts
.type
== BT_CHARACTER
&& !sym
->attr
.select_type_temporary
)
8803 sym
->ts
.u
.cl
= target
->ts
.u
.cl
;
8805 if (sym
->ts
.deferred
&& target
->expr_type
== EXPR_VARIABLE
8806 && target
->symtree
->n
.sym
->attr
.dummy
8807 && sym
->ts
.u
.cl
== target
->ts
.u
.cl
)
8809 sym
->ts
.u
.cl
= gfc_new_charlen (sym
->ns
, NULL
);
8810 sym
->ts
.deferred
= 1;
8813 if (!sym
->ts
.u
.cl
->length
8814 && !sym
->ts
.deferred
8815 && target
->expr_type
== EXPR_CONSTANT
)
8817 sym
->ts
.u
.cl
->length
=
8818 gfc_get_int_expr (gfc_charlen_int_kind
, NULL
,
8819 target
->value
.character
.length
);
8821 else if ((!sym
->ts
.u
.cl
->length
8822 || sym
->ts
.u
.cl
->length
->expr_type
!= EXPR_CONSTANT
)
8823 && target
->expr_type
!= EXPR_VARIABLE
)
8825 sym
->ts
.u
.cl
= gfc_new_charlen (sym
->ns
, NULL
);
8826 sym
->ts
.deferred
= 1;
8828 /* This is reset in trans-stmt.c after the assignment
8829 of the target expression to the associate name. */
8830 sym
->attr
.allocatable
= 1;
8834 /* If the target is a good class object, so is the associate variable. */
8835 if (sym
->ts
.type
== BT_CLASS
&& gfc_expr_attr (target
).class_ok
)
8836 sym
->attr
.class_ok
= 1;
8840 /* Ensure that SELECT TYPE expressions have the correct rank and a full
8841 array reference, where necessary. The symbols are artificial and so
8842 the dimension attribute and arrayspec can also be set. In addition,
8843 sometimes the expr1 arrives as BT_DERIVED, when the symbol is BT_CLASS.
8844 This is corrected here as well.*/
8847 fixup_array_ref (gfc_expr
**expr1
, gfc_expr
*expr2
,
8848 int rank
, gfc_ref
*ref
)
8850 gfc_ref
*nref
= (*expr1
)->ref
;
8851 gfc_symbol
*sym1
= (*expr1
)->symtree
->n
.sym
;
8852 gfc_symbol
*sym2
= expr2
? expr2
->symtree
->n
.sym
: NULL
;
8853 (*expr1
)->rank
= rank
;
8854 if (sym1
->ts
.type
== BT_CLASS
)
8856 if ((*expr1
)->ts
.type
!= BT_CLASS
)
8857 (*expr1
)->ts
= sym1
->ts
;
8859 CLASS_DATA (sym1
)->attr
.dimension
= 1;
8860 if (CLASS_DATA (sym1
)->as
== NULL
&& sym2
)
8861 CLASS_DATA (sym1
)->as
8862 = gfc_copy_array_spec (CLASS_DATA (sym2
)->as
);
8866 sym1
->attr
.dimension
= 1;
8867 if (sym1
->as
== NULL
&& sym2
)
8868 sym1
->as
= gfc_copy_array_spec (sym2
->as
);
8871 for (; nref
; nref
= nref
->next
)
8872 if (nref
->next
== NULL
)
8875 if (ref
&& nref
&& nref
->type
!= REF_ARRAY
)
8876 nref
->next
= gfc_copy_ref (ref
);
8877 else if (ref
&& !nref
)
8878 (*expr1
)->ref
= gfc_copy_ref (ref
);
8883 build_loc_call (gfc_expr
*sym_expr
)
8886 loc_call
= gfc_get_expr ();
8887 loc_call
->expr_type
= EXPR_FUNCTION
;
8888 gfc_get_sym_tree ("_loc", gfc_current_ns
, &loc_call
->symtree
, false);
8889 loc_call
->symtree
->n
.sym
->attr
.flavor
= FL_PROCEDURE
;
8890 loc_call
->symtree
->n
.sym
->attr
.intrinsic
= 1;
8891 loc_call
->symtree
->n
.sym
->result
= loc_call
->symtree
->n
.sym
;
8892 gfc_commit_symbol (loc_call
->symtree
->n
.sym
);
8893 loc_call
->ts
.type
= BT_INTEGER
;
8894 loc_call
->ts
.kind
= gfc_index_integer_kind
;
8895 loc_call
->value
.function
.isym
= gfc_intrinsic_function_by_id (GFC_ISYM_LOC
);
8896 loc_call
->value
.function
.actual
= gfc_get_actual_arglist ();
8897 loc_call
->value
.function
.actual
->expr
= sym_expr
;
8898 loc_call
->where
= sym_expr
->where
;
8902 /* Resolve a SELECT TYPE statement. */
8905 resolve_select_type (gfc_code
*code
, gfc_namespace
*old_ns
)
8907 gfc_symbol
*selector_type
;
8908 gfc_code
*body
, *new_st
, *if_st
, *tail
;
8909 gfc_code
*class_is
= NULL
, *default_case
= NULL
;
8912 char name
[GFC_MAX_SYMBOL_LEN
];
8916 gfc_ref
* ref
= NULL
;
8917 gfc_expr
*selector_expr
= NULL
;
8919 ns
= code
->ext
.block
.ns
;
8922 /* Check for F03:C813. */
8923 if (code
->expr1
->ts
.type
!= BT_CLASS
8924 && !(code
->expr2
&& code
->expr2
->ts
.type
== BT_CLASS
))
8926 gfc_error ("Selector shall be polymorphic in SELECT TYPE statement "
8927 "at %L", &code
->loc
);
8931 if (!code
->expr1
->symtree
->n
.sym
->attr
.class_ok
)
8936 gfc_ref
*ref2
= NULL
;
8937 for (ref
= code
->expr2
->ref
; ref
!= NULL
; ref
= ref
->next
)
8938 if (ref
->type
== REF_COMPONENT
8939 && ref
->u
.c
.component
->ts
.type
== BT_CLASS
)
8944 if (code
->expr1
->symtree
->n
.sym
->attr
.untyped
)
8945 code
->expr1
->symtree
->n
.sym
->ts
= ref2
->u
.c
.component
->ts
;
8946 selector_type
= CLASS_DATA (ref2
->u
.c
.component
)->ts
.u
.derived
;
8950 if (code
->expr1
->symtree
->n
.sym
->attr
.untyped
)
8951 code
->expr1
->symtree
->n
.sym
->ts
= code
->expr2
->ts
;
8952 selector_type
= CLASS_DATA (code
->expr2
)->ts
.u
.derived
;
8955 if (code
->expr2
->rank
&& CLASS_DATA (code
->expr1
)->as
)
8956 CLASS_DATA (code
->expr1
)->as
->rank
= code
->expr2
->rank
;
8958 /* F2008: C803 The selector expression must not be coindexed. */
8959 if (gfc_is_coindexed (code
->expr2
))
8961 gfc_error ("Selector at %L must not be coindexed",
8962 &code
->expr2
->where
);
8969 selector_type
= CLASS_DATA (code
->expr1
)->ts
.u
.derived
;
8971 if (gfc_is_coindexed (code
->expr1
))
8973 gfc_error ("Selector at %L must not be coindexed",
8974 &code
->expr1
->where
);
8979 /* Loop over TYPE IS / CLASS IS cases. */
8980 for (body
= code
->block
; body
; body
= body
->block
)
8982 c
= body
->ext
.block
.case_list
;
8986 /* Check for repeated cases. */
8987 for (tail
= code
->block
; tail
; tail
= tail
->block
)
8989 gfc_case
*d
= tail
->ext
.block
.case_list
;
8993 if (c
->ts
.type
== d
->ts
.type
8994 && ((c
->ts
.type
== BT_DERIVED
8995 && c
->ts
.u
.derived
&& d
->ts
.u
.derived
8996 && !strcmp (c
->ts
.u
.derived
->name
,
8997 d
->ts
.u
.derived
->name
))
8998 || c
->ts
.type
== BT_UNKNOWN
8999 || (!(c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
9000 && c
->ts
.kind
== d
->ts
.kind
)))
9002 gfc_error ("TYPE IS at %L overlaps with TYPE IS at %L",
9003 &c
->where
, &d
->where
);
9009 /* Check F03:C815. */
9010 if ((c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
9011 && !selector_type
->attr
.unlimited_polymorphic
9012 && !gfc_type_is_extensible (c
->ts
.u
.derived
))
9014 gfc_error ("Derived type %qs at %L must be extensible",
9015 c
->ts
.u
.derived
->name
, &c
->where
);
9020 /* Check F03:C816. */
9021 if (c
->ts
.type
!= BT_UNKNOWN
&& !selector_type
->attr
.unlimited_polymorphic
9022 && ((c
->ts
.type
!= BT_DERIVED
&& c
->ts
.type
!= BT_CLASS
)
9023 || !gfc_type_is_extension_of (selector_type
, c
->ts
.u
.derived
)))
9025 if (c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
9026 gfc_error ("Derived type %qs at %L must be an extension of %qs",
9027 c
->ts
.u
.derived
->name
, &c
->where
, selector_type
->name
);
9029 gfc_error ("Unexpected intrinsic type %qs at %L",
9030 gfc_basic_typename (c
->ts
.type
), &c
->where
);
9035 /* Check F03:C814. */
9036 if (c
->ts
.type
== BT_CHARACTER
9037 && (c
->ts
.u
.cl
->length
!= NULL
|| c
->ts
.deferred
))
9039 gfc_error ("The type-spec at %L shall specify that each length "
9040 "type parameter is assumed", &c
->where
);
9045 /* Intercept the DEFAULT case. */
9046 if (c
->ts
.type
== BT_UNKNOWN
)
9048 /* Check F03:C818. */
9051 gfc_error ("The DEFAULT CASE at %L cannot be followed "
9052 "by a second DEFAULT CASE at %L",
9053 &default_case
->ext
.block
.case_list
->where
, &c
->where
);
9058 default_case
= body
;
9065 /* Transform SELECT TYPE statement to BLOCK and associate selector to
9066 target if present. If there are any EXIT statements referring to the
9067 SELECT TYPE construct, this is no problem because the gfc_code
9068 reference stays the same and EXIT is equally possible from the BLOCK
9069 it is changed to. */
9070 code
->op
= EXEC_BLOCK
;
9073 gfc_association_list
* assoc
;
9075 assoc
= gfc_get_association_list ();
9076 assoc
->st
= code
->expr1
->symtree
;
9077 assoc
->target
= gfc_copy_expr (code
->expr2
);
9078 assoc
->target
->where
= code
->expr2
->where
;
9079 /* assoc->variable will be set by resolve_assoc_var. */
9081 code
->ext
.block
.assoc
= assoc
;
9082 code
->expr1
->symtree
->n
.sym
->assoc
= assoc
;
9084 resolve_assoc_var (code
->expr1
->symtree
->n
.sym
, false);
9087 code
->ext
.block
.assoc
= NULL
;
9089 /* Ensure that the selector rank and arrayspec are available to
9090 correct expressions in which they might be missing. */
9091 if (code
->expr2
&& code
->expr2
->rank
)
9093 rank
= code
->expr2
->rank
;
9094 for (ref
= code
->expr2
->ref
; ref
; ref
= ref
->next
)
9095 if (ref
->next
== NULL
)
9097 if (ref
&& ref
->type
== REF_ARRAY
)
9098 ref
= gfc_copy_ref (ref
);
9100 /* Fixup expr1 if necessary. */
9102 fixup_array_ref (&code
->expr1
, code
->expr2
, rank
, ref
);
9104 else if (code
->expr1
->rank
)
9106 rank
= code
->expr1
->rank
;
9107 for (ref
= code
->expr1
->ref
; ref
; ref
= ref
->next
)
9108 if (ref
->next
== NULL
)
9110 if (ref
&& ref
->type
== REF_ARRAY
)
9111 ref
= gfc_copy_ref (ref
);
9114 /* Add EXEC_SELECT to switch on type. */
9115 new_st
= gfc_get_code (code
->op
);
9116 new_st
->expr1
= code
->expr1
;
9117 new_st
->expr2
= code
->expr2
;
9118 new_st
->block
= code
->block
;
9119 code
->expr1
= code
->expr2
= NULL
;
9124 ns
->code
->next
= new_st
;
9126 code
->op
= EXEC_SELECT_TYPE
;
9128 /* Use the intrinsic LOC function to generate an integer expression
9129 for the vtable of the selector. Note that the rank of the selector
9130 expression has to be set to zero. */
9131 gfc_add_vptr_component (code
->expr1
);
9132 code
->expr1
->rank
= 0;
9133 code
->expr1
= build_loc_call (code
->expr1
);
9134 selector_expr
= code
->expr1
->value
.function
.actual
->expr
;
9136 /* Loop over TYPE IS / CLASS IS cases. */
9137 for (body
= code
->block
; body
; body
= body
->block
)
9141 c
= body
->ext
.block
.case_list
;
9143 /* Generate an index integer expression for address of the
9144 TYPE/CLASS vtable and store it in c->low. The hash expression
9145 is stored in c->high and is used to resolve intrinsic cases. */
9146 if (c
->ts
.type
!= BT_UNKNOWN
)
9148 if (c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
9150 vtab
= gfc_find_derived_vtab (c
->ts
.u
.derived
);
9152 c
->high
= gfc_get_int_expr (gfc_integer_4_kind
, NULL
,
9153 c
->ts
.u
.derived
->hash_value
);
9157 vtab
= gfc_find_vtab (&c
->ts
);
9158 gcc_assert (vtab
&& CLASS_DATA (vtab
)->initializer
);
9159 e
= CLASS_DATA (vtab
)->initializer
;
9160 c
->high
= gfc_copy_expr (e
);
9161 if (c
->high
->ts
.kind
!= gfc_integer_4_kind
)
9164 ts
.kind
= gfc_integer_4_kind
;
9165 ts
.type
= BT_INTEGER
;
9166 gfc_convert_type_warn (c
->high
, &ts
, 2, 0);
9170 e
= gfc_lval_expr_from_sym (vtab
);
9171 c
->low
= build_loc_call (e
);
9176 /* Associate temporary to selector. This should only be done
9177 when this case is actually true, so build a new ASSOCIATE
9178 that does precisely this here (instead of using the
9181 if (c
->ts
.type
== BT_CLASS
)
9182 sprintf (name
, "__tmp_class_%s", c
->ts
.u
.derived
->name
);
9183 else if (c
->ts
.type
== BT_DERIVED
)
9184 sprintf (name
, "__tmp_type_%s", c
->ts
.u
.derived
->name
);
9185 else if (c
->ts
.type
== BT_CHARACTER
)
9187 HOST_WIDE_INT charlen
= 0;
9188 if (c
->ts
.u
.cl
&& c
->ts
.u
.cl
->length
9189 && c
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
)
9190 charlen
= gfc_mpz_get_hwi (c
->ts
.u
.cl
->length
->value
.integer
);
9191 snprintf (name
, sizeof (name
),
9192 "__tmp_%s_" HOST_WIDE_INT_PRINT_DEC
"_%d",
9193 gfc_basic_typename (c
->ts
.type
), charlen
, c
->ts
.kind
);
9196 sprintf (name
, "__tmp_%s_%d", gfc_basic_typename (c
->ts
.type
),
9199 st
= gfc_find_symtree (ns
->sym_root
, name
);
9200 gcc_assert (st
->n
.sym
->assoc
);
9201 st
->n
.sym
->assoc
->target
= gfc_get_variable_expr (selector_expr
->symtree
);
9202 st
->n
.sym
->assoc
->target
->where
= selector_expr
->where
;
9203 if (c
->ts
.type
!= BT_CLASS
&& c
->ts
.type
!= BT_UNKNOWN
)
9205 gfc_add_data_component (st
->n
.sym
->assoc
->target
);
9206 /* Fixup the target expression if necessary. */
9208 fixup_array_ref (&st
->n
.sym
->assoc
->target
, NULL
, rank
, ref
);
9211 new_st
= gfc_get_code (EXEC_BLOCK
);
9212 new_st
->ext
.block
.ns
= gfc_build_block_ns (ns
);
9213 new_st
->ext
.block
.ns
->code
= body
->next
;
9214 body
->next
= new_st
;
9216 /* Chain in the new list only if it is marked as dangling. Otherwise
9217 there is a CASE label overlap and this is already used. Just ignore,
9218 the error is diagnosed elsewhere. */
9219 if (st
->n
.sym
->assoc
->dangling
)
9221 new_st
->ext
.block
.assoc
= st
->n
.sym
->assoc
;
9222 st
->n
.sym
->assoc
->dangling
= 0;
9225 resolve_assoc_var (st
->n
.sym
, false);
9228 /* Take out CLASS IS cases for separate treatment. */
9230 while (body
&& body
->block
)
9232 if (body
->block
->ext
.block
.case_list
->ts
.type
== BT_CLASS
)
9234 /* Add to class_is list. */
9235 if (class_is
== NULL
)
9237 class_is
= body
->block
;
9242 for (tail
= class_is
; tail
->block
; tail
= tail
->block
) ;
9243 tail
->block
= body
->block
;
9246 /* Remove from EXEC_SELECT list. */
9247 body
->block
= body
->block
->block
;
9260 /* Add a default case to hold the CLASS IS cases. */
9261 for (tail
= code
; tail
->block
; tail
= tail
->block
) ;
9262 tail
->block
= gfc_get_code (EXEC_SELECT_TYPE
);
9264 tail
->ext
.block
.case_list
= gfc_get_case ();
9265 tail
->ext
.block
.case_list
->ts
.type
= BT_UNKNOWN
;
9267 default_case
= tail
;
9270 /* More than one CLASS IS block? */
9271 if (class_is
->block
)
9275 /* Sort CLASS IS blocks by extension level. */
9279 for (c1
= &class_is
; (*c1
) && (*c1
)->block
; c1
= &((*c1
)->block
))
9282 /* F03:C817 (check for doubles). */
9283 if ((*c1
)->ext
.block
.case_list
->ts
.u
.derived
->hash_value
9284 == c2
->ext
.block
.case_list
->ts
.u
.derived
->hash_value
)
9286 gfc_error ("Double CLASS IS block in SELECT TYPE "
9288 &c2
->ext
.block
.case_list
->where
);
9291 if ((*c1
)->ext
.block
.case_list
->ts
.u
.derived
->attr
.extension
9292 < c2
->ext
.block
.case_list
->ts
.u
.derived
->attr
.extension
)
9295 (*c1
)->block
= c2
->block
;
9305 /* Generate IF chain. */
9306 if_st
= gfc_get_code (EXEC_IF
);
9308 for (body
= class_is
; body
; body
= body
->block
)
9310 new_st
->block
= gfc_get_code (EXEC_IF
);
9311 new_st
= new_st
->block
;
9312 /* Set up IF condition: Call _gfortran_is_extension_of. */
9313 new_st
->expr1
= gfc_get_expr ();
9314 new_st
->expr1
->expr_type
= EXPR_FUNCTION
;
9315 new_st
->expr1
->ts
.type
= BT_LOGICAL
;
9316 new_st
->expr1
->ts
.kind
= 4;
9317 new_st
->expr1
->value
.function
.name
= gfc_get_string (PREFIX ("is_extension_of"));
9318 new_st
->expr1
->value
.function
.isym
= XCNEW (gfc_intrinsic_sym
);
9319 new_st
->expr1
->value
.function
.isym
->id
= GFC_ISYM_EXTENDS_TYPE_OF
;
9320 /* Set up arguments. */
9321 new_st
->expr1
->value
.function
.actual
= gfc_get_actual_arglist ();
9322 new_st
->expr1
->value
.function
.actual
->expr
= gfc_get_variable_expr (selector_expr
->symtree
);
9323 new_st
->expr1
->value
.function
.actual
->expr
->where
= code
->loc
;
9324 new_st
->expr1
->where
= code
->loc
;
9325 gfc_add_vptr_component (new_st
->expr1
->value
.function
.actual
->expr
);
9326 vtab
= gfc_find_derived_vtab (body
->ext
.block
.case_list
->ts
.u
.derived
);
9327 st
= gfc_find_symtree (vtab
->ns
->sym_root
, vtab
->name
);
9328 new_st
->expr1
->value
.function
.actual
->next
= gfc_get_actual_arglist ();
9329 new_st
->expr1
->value
.function
.actual
->next
->expr
= gfc_get_variable_expr (st
);
9330 new_st
->expr1
->value
.function
.actual
->next
->expr
->where
= code
->loc
;
9331 new_st
->next
= body
->next
;
9333 if (default_case
->next
)
9335 new_st
->block
= gfc_get_code (EXEC_IF
);
9336 new_st
= new_st
->block
;
9337 new_st
->next
= default_case
->next
;
9340 /* Replace CLASS DEFAULT code by the IF chain. */
9341 default_case
->next
= if_st
;
9344 /* Resolve the internal code. This cannot be done earlier because
9345 it requires that the sym->assoc of selectors is set already. */
9346 gfc_current_ns
= ns
;
9347 gfc_resolve_blocks (code
->block
, gfc_current_ns
);
9348 gfc_current_ns
= old_ns
;
9355 /* Resolve a transfer statement. This is making sure that:
9356 -- a derived type being transferred has only non-pointer components
9357 -- a derived type being transferred doesn't have private components, unless
9358 it's being transferred from the module where the type was defined
9359 -- we're not trying to transfer a whole assumed size array. */
9362 resolve_transfer (gfc_code
*code
)
9364 gfc_symbol
*sym
, *derived
;
9368 bool formatted
= false;
9369 gfc_dt
*dt
= code
->ext
.dt
;
9370 gfc_symbol
*dtio_sub
= NULL
;
9374 while (exp
!= NULL
&& exp
->expr_type
== EXPR_OP
9375 && exp
->value
.op
.op
== INTRINSIC_PARENTHESES
)
9376 exp
= exp
->value
.op
.op1
;
9378 if (exp
&& exp
->expr_type
== EXPR_NULL
9381 gfc_error ("Invalid context for NULL () intrinsic at %L",
9386 if (exp
== NULL
|| (exp
->expr_type
!= EXPR_VARIABLE
9387 && exp
->expr_type
!= EXPR_FUNCTION
9388 && exp
->expr_type
!= EXPR_STRUCTURE
))
9391 /* If we are reading, the variable will be changed. Note that
9392 code->ext.dt may be NULL if the TRANSFER is related to
9393 an INQUIRE statement -- but in this case, we are not reading, either. */
9394 if (dt
&& dt
->dt_io_kind
->value
.iokind
== M_READ
9395 && !gfc_check_vardef_context (exp
, false, false, false,
9399 const gfc_typespec
*ts
= exp
->expr_type
== EXPR_STRUCTURE
9400 || exp
->expr_type
== EXPR_FUNCTION
9401 ? &exp
->ts
: &exp
->symtree
->n
.sym
->ts
;
9403 /* Go to actual component transferred. */
9404 for (ref
= exp
->ref
; ref
; ref
= ref
->next
)
9405 if (ref
->type
== REF_COMPONENT
)
9406 ts
= &ref
->u
.c
.component
->ts
;
9408 if (dt
&& dt
->dt_io_kind
->value
.iokind
!= M_INQUIRE
9409 && (ts
->type
== BT_DERIVED
|| ts
->type
== BT_CLASS
))
9411 derived
= ts
->u
.derived
;
9413 /* Determine when to use the formatted DTIO procedure. */
9414 if (dt
&& (dt
->format_expr
|| dt
->format_label
))
9417 write
= dt
->dt_io_kind
->value
.iokind
== M_WRITE
9418 || dt
->dt_io_kind
->value
.iokind
== M_PRINT
;
9419 dtio_sub
= gfc_find_specific_dtio_proc (derived
, write
, formatted
);
9421 if (dtio_sub
!= NULL
&& exp
->expr_type
== EXPR_VARIABLE
)
9424 sym
= exp
->symtree
->n
.sym
->ns
->proc_name
;
9425 /* Check to see if this is a nested DTIO call, with the
9426 dummy as the io-list object. */
9427 if (sym
&& sym
== dtio_sub
&& sym
->formal
9428 && sym
->formal
->sym
== exp
->symtree
->n
.sym
9429 && exp
->ref
== NULL
)
9431 if (!sym
->attr
.recursive
)
9433 gfc_error ("DTIO %s procedure at %L must be recursive",
9434 sym
->name
, &sym
->declared_at
);
9441 if (ts
->type
== BT_CLASS
&& dtio_sub
== NULL
)
9443 gfc_error ("Data transfer element at %L cannot be polymorphic unless "
9444 "it is processed by a defined input/output procedure",
9449 if (ts
->type
== BT_DERIVED
)
9451 /* Check that transferred derived type doesn't contain POINTER
9452 components unless it is processed by a defined input/output
9454 if (ts
->u
.derived
->attr
.pointer_comp
&& dtio_sub
== NULL
)
9456 gfc_error ("Data transfer element at %L cannot have POINTER "
9457 "components unless it is processed by a defined "
9458 "input/output procedure", &code
->loc
);
9463 if (ts
->u
.derived
->attr
.proc_pointer_comp
)
9465 gfc_error ("Data transfer element at %L cannot have "
9466 "procedure pointer components", &code
->loc
);
9470 if (ts
->u
.derived
->attr
.alloc_comp
&& dtio_sub
== NULL
)
9472 gfc_error ("Data transfer element at %L cannot have ALLOCATABLE "
9473 "components unless it is processed by a defined "
9474 "input/output procedure", &code
->loc
);
9478 /* C_PTR and C_FUNPTR have private components which means they cannot
9479 be printed. However, if -std=gnu and not -pedantic, allow
9480 the component to be printed to help debugging. */
9481 if (ts
->u
.derived
->ts
.f90_type
== BT_VOID
)
9483 if (!gfc_notify_std (GFC_STD_GNU
, "Data transfer element at %L "
9484 "cannot have PRIVATE components", &code
->loc
))
9487 else if (derived_inaccessible (ts
->u
.derived
) && dtio_sub
== NULL
)
9489 gfc_error ("Data transfer element at %L cannot have "
9490 "PRIVATE components unless it is processed by "
9491 "a defined input/output procedure", &code
->loc
);
9496 if (exp
->expr_type
== EXPR_STRUCTURE
)
9499 sym
= exp
->symtree
->n
.sym
;
9501 if (sym
->as
!= NULL
&& sym
->as
->type
== AS_ASSUMED_SIZE
&& exp
->ref
9502 && exp
->ref
->type
== REF_ARRAY
&& exp
->ref
->u
.ar
.type
== AR_FULL
)
9504 gfc_error ("Data transfer element at %L cannot be a full reference to "
9505 "an assumed-size array", &code
->loc
);
9509 if (async_io_dt
&& exp
->expr_type
== EXPR_VARIABLE
)
9510 exp
->symtree
->n
.sym
->attr
.asynchronous
= 1;
9514 /*********** Toplevel code resolution subroutines ***********/
9516 /* Find the set of labels that are reachable from this block. We also
9517 record the last statement in each block. */
9520 find_reachable_labels (gfc_code
*block
)
9527 cs_base
->reachable_labels
= bitmap_alloc (&labels_obstack
);
9529 /* Collect labels in this block. We don't keep those corresponding
9530 to END {IF|SELECT}, these are checked in resolve_branch by going
9531 up through the code_stack. */
9532 for (c
= block
; c
; c
= c
->next
)
9534 if (c
->here
&& c
->op
!= EXEC_END_NESTED_BLOCK
)
9535 bitmap_set_bit (cs_base
->reachable_labels
, c
->here
->value
);
9538 /* Merge with labels from parent block. */
9541 gcc_assert (cs_base
->prev
->reachable_labels
);
9542 bitmap_ior_into (cs_base
->reachable_labels
,
9543 cs_base
->prev
->reachable_labels
);
9549 resolve_lock_unlock_event (gfc_code
*code
)
9551 if (code
->expr1
->expr_type
== EXPR_FUNCTION
9552 && code
->expr1
->value
.function
.isym
9553 && code
->expr1
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
)
9554 remove_caf_get_intrinsic (code
->expr1
);
9556 if ((code
->op
== EXEC_LOCK
|| code
->op
== EXEC_UNLOCK
)
9557 && (code
->expr1
->ts
.type
!= BT_DERIVED
9558 || code
->expr1
->expr_type
!= EXPR_VARIABLE
9559 || code
->expr1
->ts
.u
.derived
->from_intmod
!= INTMOD_ISO_FORTRAN_ENV
9560 || code
->expr1
->ts
.u
.derived
->intmod_sym_id
!= ISOFORTRAN_LOCK_TYPE
9561 || code
->expr1
->rank
!= 0
9562 || (!gfc_is_coarray (code
->expr1
) &&
9563 !gfc_is_coindexed (code
->expr1
))))
9564 gfc_error ("Lock variable at %L must be a scalar of type LOCK_TYPE",
9565 &code
->expr1
->where
);
9566 else if ((code
->op
== EXEC_EVENT_POST
|| code
->op
== EXEC_EVENT_WAIT
)
9567 && (code
->expr1
->ts
.type
!= BT_DERIVED
9568 || code
->expr1
->expr_type
!= EXPR_VARIABLE
9569 || code
->expr1
->ts
.u
.derived
->from_intmod
9570 != INTMOD_ISO_FORTRAN_ENV
9571 || code
->expr1
->ts
.u
.derived
->intmod_sym_id
9572 != ISOFORTRAN_EVENT_TYPE
9573 || code
->expr1
->rank
!= 0))
9574 gfc_error ("Event variable at %L must be a scalar of type EVENT_TYPE",
9575 &code
->expr1
->where
);
9576 else if (code
->op
== EXEC_EVENT_POST
&& !gfc_is_coarray (code
->expr1
)
9577 && !gfc_is_coindexed (code
->expr1
))
9578 gfc_error ("Event variable argument at %L must be a coarray or coindexed",
9579 &code
->expr1
->where
);
9580 else if (code
->op
== EXEC_EVENT_WAIT
&& !gfc_is_coarray (code
->expr1
))
9581 gfc_error ("Event variable argument at %L must be a coarray but not "
9582 "coindexed", &code
->expr1
->where
);
9586 && (code
->expr2
->ts
.type
!= BT_INTEGER
|| code
->expr2
->rank
!= 0
9587 || code
->expr2
->expr_type
!= EXPR_VARIABLE
))
9588 gfc_error ("STAT= argument at %L must be a scalar INTEGER variable",
9589 &code
->expr2
->where
);
9592 && !gfc_check_vardef_context (code
->expr2
, false, false, false,
9593 _("STAT variable")))
9598 && (code
->expr3
->ts
.type
!= BT_CHARACTER
|| code
->expr3
->rank
!= 0
9599 || code
->expr3
->expr_type
!= EXPR_VARIABLE
))
9600 gfc_error ("ERRMSG= argument at %L must be a scalar CHARACTER variable",
9601 &code
->expr3
->where
);
9604 && !gfc_check_vardef_context (code
->expr3
, false, false, false,
9605 _("ERRMSG variable")))
9608 /* Check for LOCK the ACQUIRED_LOCK. */
9609 if (code
->op
!= EXEC_EVENT_WAIT
&& code
->expr4
9610 && (code
->expr4
->ts
.type
!= BT_LOGICAL
|| code
->expr4
->rank
!= 0
9611 || code
->expr4
->expr_type
!= EXPR_VARIABLE
))
9612 gfc_error ("ACQUIRED_LOCK= argument at %L must be a scalar LOGICAL "
9613 "variable", &code
->expr4
->where
);
9615 if (code
->op
!= EXEC_EVENT_WAIT
&& code
->expr4
9616 && !gfc_check_vardef_context (code
->expr4
, false, false, false,
9617 _("ACQUIRED_LOCK variable")))
9620 /* Check for EVENT WAIT the UNTIL_COUNT. */
9621 if (code
->op
== EXEC_EVENT_WAIT
&& code
->expr4
)
9623 if (!gfc_resolve_expr (code
->expr4
) || code
->expr4
->ts
.type
!= BT_INTEGER
9624 || code
->expr4
->rank
!= 0)
9625 gfc_error ("UNTIL_COUNT= argument at %L must be a scalar INTEGER "
9626 "expression", &code
->expr4
->where
);
9632 resolve_critical (gfc_code
*code
)
9634 gfc_symtree
*symtree
;
9635 gfc_symbol
*lock_type
;
9636 char name
[GFC_MAX_SYMBOL_LEN
];
9637 static int serial
= 0;
9639 if (flag_coarray
!= GFC_FCOARRAY_LIB
)
9642 symtree
= gfc_find_symtree (gfc_current_ns
->sym_root
,
9643 GFC_PREFIX ("lock_type"));
9645 lock_type
= symtree
->n
.sym
;
9648 if (gfc_get_sym_tree (GFC_PREFIX ("lock_type"), gfc_current_ns
, &symtree
,
9651 lock_type
= symtree
->n
.sym
;
9652 lock_type
->attr
.flavor
= FL_DERIVED
;
9653 lock_type
->attr
.zero_comp
= 1;
9654 lock_type
->from_intmod
= INTMOD_ISO_FORTRAN_ENV
;
9655 lock_type
->intmod_sym_id
= ISOFORTRAN_LOCK_TYPE
;
9658 sprintf(name
, GFC_PREFIX ("lock_var") "%d",serial
++);
9659 if (gfc_get_sym_tree (name
, gfc_current_ns
, &symtree
, false) != 0)
9662 code
->resolved_sym
= symtree
->n
.sym
;
9663 symtree
->n
.sym
->attr
.flavor
= FL_VARIABLE
;
9664 symtree
->n
.sym
->attr
.referenced
= 1;
9665 symtree
->n
.sym
->attr
.artificial
= 1;
9666 symtree
->n
.sym
->attr
.codimension
= 1;
9667 symtree
->n
.sym
->ts
.type
= BT_DERIVED
;
9668 symtree
->n
.sym
->ts
.u
.derived
= lock_type
;
9669 symtree
->n
.sym
->as
= gfc_get_array_spec ();
9670 symtree
->n
.sym
->as
->corank
= 1;
9671 symtree
->n
.sym
->as
->type
= AS_EXPLICIT
;
9672 symtree
->n
.sym
->as
->cotype
= AS_EXPLICIT
;
9673 symtree
->n
.sym
->as
->lower
[0] = gfc_get_int_expr (gfc_default_integer_kind
,
9675 gfc_commit_symbols();
9680 resolve_sync (gfc_code
*code
)
9682 /* Check imageset. The * case matches expr1 == NULL. */
9685 if (code
->expr1
->ts
.type
!= BT_INTEGER
|| code
->expr1
->rank
> 1)
9686 gfc_error ("Imageset argument at %L must be a scalar or rank-1 "
9687 "INTEGER expression", &code
->expr1
->where
);
9688 if (code
->expr1
->expr_type
== EXPR_CONSTANT
&& code
->expr1
->rank
== 0
9689 && mpz_cmp_si (code
->expr1
->value
.integer
, 1) < 0)
9690 gfc_error ("Imageset argument at %L must between 1 and num_images()",
9691 &code
->expr1
->where
);
9692 else if (code
->expr1
->expr_type
== EXPR_ARRAY
9693 && gfc_simplify_expr (code
->expr1
, 0))
9695 gfc_constructor
*cons
;
9696 cons
= gfc_constructor_first (code
->expr1
->value
.constructor
);
9697 for (; cons
; cons
= gfc_constructor_next (cons
))
9698 if (cons
->expr
->expr_type
== EXPR_CONSTANT
9699 && mpz_cmp_si (cons
->expr
->value
.integer
, 1) < 0)
9700 gfc_error ("Imageset argument at %L must between 1 and "
9701 "num_images()", &cons
->expr
->where
);
9706 gfc_resolve_expr (code
->expr2
);
9708 && (code
->expr2
->ts
.type
!= BT_INTEGER
|| code
->expr2
->rank
!= 0
9709 || code
->expr2
->expr_type
!= EXPR_VARIABLE
))
9710 gfc_error ("STAT= argument at %L must be a scalar INTEGER variable",
9711 &code
->expr2
->where
);
9714 gfc_resolve_expr (code
->expr3
);
9716 && (code
->expr3
->ts
.type
!= BT_CHARACTER
|| code
->expr3
->rank
!= 0
9717 || code
->expr3
->expr_type
!= EXPR_VARIABLE
))
9718 gfc_error ("ERRMSG= argument at %L must be a scalar CHARACTER variable",
9719 &code
->expr3
->where
);
9723 /* Given a branch to a label, see if the branch is conforming.
9724 The code node describes where the branch is located. */
9727 resolve_branch (gfc_st_label
*label
, gfc_code
*code
)
9734 /* Step one: is this a valid branching target? */
9736 if (label
->defined
== ST_LABEL_UNKNOWN
)
9738 gfc_error ("Label %d referenced at %L is never defined", label
->value
,
9743 if (label
->defined
!= ST_LABEL_TARGET
&& label
->defined
!= ST_LABEL_DO_TARGET
)
9745 gfc_error ("Statement at %L is not a valid branch target statement "
9746 "for the branch statement at %L", &label
->where
, &code
->loc
);
9750 /* Step two: make sure this branch is not a branch to itself ;-) */
9752 if (code
->here
== label
)
9755 "Branch at %L may result in an infinite loop", &code
->loc
);
9759 /* Step three: See if the label is in the same block as the
9760 branching statement. The hard work has been done by setting up
9761 the bitmap reachable_labels. */
9763 if (bitmap_bit_p (cs_base
->reachable_labels
, label
->value
))
9765 /* Check now whether there is a CRITICAL construct; if so, check
9766 whether the label is still visible outside of the CRITICAL block,
9767 which is invalid. */
9768 for (stack
= cs_base
; stack
; stack
= stack
->prev
)
9770 if (stack
->current
->op
== EXEC_CRITICAL
9771 && bitmap_bit_p (stack
->reachable_labels
, label
->value
))
9772 gfc_error ("GOTO statement at %L leaves CRITICAL construct for "
9773 "label at %L", &code
->loc
, &label
->where
);
9774 else if (stack
->current
->op
== EXEC_DO_CONCURRENT
9775 && bitmap_bit_p (stack
->reachable_labels
, label
->value
))
9776 gfc_error ("GOTO statement at %L leaves DO CONCURRENT construct "
9777 "for label at %L", &code
->loc
, &label
->where
);
9783 /* Step four: If we haven't found the label in the bitmap, it may
9784 still be the label of the END of the enclosing block, in which
9785 case we find it by going up the code_stack. */
9787 for (stack
= cs_base
; stack
; stack
= stack
->prev
)
9789 if (stack
->current
->next
&& stack
->current
->next
->here
== label
)
9791 if (stack
->current
->op
== EXEC_CRITICAL
)
9793 /* Note: A label at END CRITICAL does not leave the CRITICAL
9794 construct as END CRITICAL is still part of it. */
9795 gfc_error ("GOTO statement at %L leaves CRITICAL construct for label"
9796 " at %L", &code
->loc
, &label
->where
);
9799 else if (stack
->current
->op
== EXEC_DO_CONCURRENT
)
9801 gfc_error ("GOTO statement at %L leaves DO CONCURRENT construct for "
9802 "label at %L", &code
->loc
, &label
->where
);
9809 gcc_assert (stack
->current
->next
->op
== EXEC_END_NESTED_BLOCK
);
9813 /* The label is not in an enclosing block, so illegal. This was
9814 allowed in Fortran 66, so we allow it as extension. No
9815 further checks are necessary in this case. */
9816 gfc_notify_std (GFC_STD_LEGACY
, "Label at %L is not in the same block "
9817 "as the GOTO statement at %L", &label
->where
,
9823 /* Check whether EXPR1 has the same shape as EXPR2. */
9826 resolve_where_shape (gfc_expr
*expr1
, gfc_expr
*expr2
)
9828 mpz_t shape
[GFC_MAX_DIMENSIONS
];
9829 mpz_t shape2
[GFC_MAX_DIMENSIONS
];
9830 bool result
= false;
9833 /* Compare the rank. */
9834 if (expr1
->rank
!= expr2
->rank
)
9837 /* Compare the size of each dimension. */
9838 for (i
=0; i
<expr1
->rank
; i
++)
9840 if (!gfc_array_dimen_size (expr1
, i
, &shape
[i
]))
9843 if (!gfc_array_dimen_size (expr2
, i
, &shape2
[i
]))
9846 if (mpz_cmp (shape
[i
], shape2
[i
]))
9850 /* When either of the two expression is an assumed size array, we
9851 ignore the comparison of dimension sizes. */
9856 gfc_clear_shape (shape
, i
);
9857 gfc_clear_shape (shape2
, i
);
9862 /* Check whether a WHERE assignment target or a WHERE mask expression
9863 has the same shape as the outmost WHERE mask expression. */
9866 resolve_where (gfc_code
*code
, gfc_expr
*mask
)
9872 cblock
= code
->block
;
9874 /* Store the first WHERE mask-expr of the WHERE statement or construct.
9875 In case of nested WHERE, only the outmost one is stored. */
9876 if (mask
== NULL
) /* outmost WHERE */
9878 else /* inner WHERE */
9885 /* Check if the mask-expr has a consistent shape with the
9886 outmost WHERE mask-expr. */
9887 if (!resolve_where_shape (cblock
->expr1
, e
))
9888 gfc_error ("WHERE mask at %L has inconsistent shape",
9889 &cblock
->expr1
->where
);
9892 /* the assignment statement of a WHERE statement, or the first
9893 statement in where-body-construct of a WHERE construct */
9894 cnext
= cblock
->next
;
9899 /* WHERE assignment statement */
9902 /* Check shape consistent for WHERE assignment target. */
9903 if (e
&& !resolve_where_shape (cnext
->expr1
, e
))
9904 gfc_error ("WHERE assignment target at %L has "
9905 "inconsistent shape", &cnext
->expr1
->where
);
9909 case EXEC_ASSIGN_CALL
:
9910 resolve_call (cnext
);
9911 if (!cnext
->resolved_sym
->attr
.elemental
)
9912 gfc_error("Non-ELEMENTAL user-defined assignment in WHERE at %L",
9913 &cnext
->ext
.actual
->expr
->where
);
9916 /* WHERE or WHERE construct is part of a where-body-construct */
9918 resolve_where (cnext
, e
);
9922 gfc_error ("Unsupported statement inside WHERE at %L",
9925 /* the next statement within the same where-body-construct */
9926 cnext
= cnext
->next
;
9928 /* the next masked-elsewhere-stmt, elsewhere-stmt, or end-where-stmt */
9929 cblock
= cblock
->block
;
9934 /* Resolve assignment in FORALL construct.
9935 NVAR is the number of FORALL index variables, and VAR_EXPR records the
9936 FORALL index variables. */
9939 gfc_resolve_assign_in_forall (gfc_code
*code
, int nvar
, gfc_expr
**var_expr
)
9943 for (n
= 0; n
< nvar
; n
++)
9945 gfc_symbol
*forall_index
;
9947 forall_index
= var_expr
[n
]->symtree
->n
.sym
;
9949 /* Check whether the assignment target is one of the FORALL index
9951 if ((code
->expr1
->expr_type
== EXPR_VARIABLE
)
9952 && (code
->expr1
->symtree
->n
.sym
== forall_index
))
9953 gfc_error ("Assignment to a FORALL index variable at %L",
9954 &code
->expr1
->where
);
9957 /* If one of the FORALL index variables doesn't appear in the
9958 assignment variable, then there could be a many-to-one
9959 assignment. Emit a warning rather than an error because the
9960 mask could be resolving this problem. */
9961 if (!find_forall_index (code
->expr1
, forall_index
, 0))
9962 gfc_warning (0, "The FORALL with index %qs is not used on the "
9963 "left side of the assignment at %L and so might "
9964 "cause multiple assignment to this object",
9965 var_expr
[n
]->symtree
->name
, &code
->expr1
->where
);
9971 /* Resolve WHERE statement in FORALL construct. */
9974 gfc_resolve_where_code_in_forall (gfc_code
*code
, int nvar
,
9975 gfc_expr
**var_expr
)
9980 cblock
= code
->block
;
9983 /* the assignment statement of a WHERE statement, or the first
9984 statement in where-body-construct of a WHERE construct */
9985 cnext
= cblock
->next
;
9990 /* WHERE assignment statement */
9992 gfc_resolve_assign_in_forall (cnext
, nvar
, var_expr
);
9995 /* WHERE operator assignment statement */
9996 case EXEC_ASSIGN_CALL
:
9997 resolve_call (cnext
);
9998 if (!cnext
->resolved_sym
->attr
.elemental
)
9999 gfc_error("Non-ELEMENTAL user-defined assignment in WHERE at %L",
10000 &cnext
->ext
.actual
->expr
->where
);
10003 /* WHERE or WHERE construct is part of a where-body-construct */
10005 gfc_resolve_where_code_in_forall (cnext
, nvar
, var_expr
);
10009 gfc_error ("Unsupported statement inside WHERE at %L",
10012 /* the next statement within the same where-body-construct */
10013 cnext
= cnext
->next
;
10015 /* the next masked-elsewhere-stmt, elsewhere-stmt, or end-where-stmt */
10016 cblock
= cblock
->block
;
10021 /* Traverse the FORALL body to check whether the following errors exist:
10022 1. For assignment, check if a many-to-one assignment happens.
10023 2. For WHERE statement, check the WHERE body to see if there is any
10024 many-to-one assignment. */
10027 gfc_resolve_forall_body (gfc_code
*code
, int nvar
, gfc_expr
**var_expr
)
10031 c
= code
->block
->next
;
10037 case EXEC_POINTER_ASSIGN
:
10038 gfc_resolve_assign_in_forall (c
, nvar
, var_expr
);
10041 case EXEC_ASSIGN_CALL
:
10045 /* Because the gfc_resolve_blocks() will handle the nested FORALL,
10046 there is no need to handle it here. */
10050 gfc_resolve_where_code_in_forall(c
, nvar
, var_expr
);
10055 /* The next statement in the FORALL body. */
10061 /* Counts the number of iterators needed inside a forall construct, including
10062 nested forall constructs. This is used to allocate the needed memory
10063 in gfc_resolve_forall. */
10066 gfc_count_forall_iterators (gfc_code
*code
)
10068 int max_iters
, sub_iters
, current_iters
;
10069 gfc_forall_iterator
*fa
;
10071 gcc_assert(code
->op
== EXEC_FORALL
);
10075 for (fa
= code
->ext
.forall_iterator
; fa
; fa
= fa
->next
)
10078 code
= code
->block
->next
;
10082 if (code
->op
== EXEC_FORALL
)
10084 sub_iters
= gfc_count_forall_iterators (code
);
10085 if (sub_iters
> max_iters
)
10086 max_iters
= sub_iters
;
10091 return current_iters
+ max_iters
;
10095 /* Given a FORALL construct, first resolve the FORALL iterator, then call
10096 gfc_resolve_forall_body to resolve the FORALL body. */
10099 gfc_resolve_forall (gfc_code
*code
, gfc_namespace
*ns
, int forall_save
)
10101 static gfc_expr
**var_expr
;
10102 static int total_var
= 0;
10103 static int nvar
= 0;
10104 int i
, old_nvar
, tmp
;
10105 gfc_forall_iterator
*fa
;
10109 if (!gfc_notify_std (GFC_STD_F2018_OBS
, "FORALL construct at %L", &code
->loc
))
10112 /* Start to resolve a FORALL construct */
10113 if (forall_save
== 0)
10115 /* Count the total number of FORALL indices in the nested FORALL
10116 construct in order to allocate the VAR_EXPR with proper size. */
10117 total_var
= gfc_count_forall_iterators (code
);
10119 /* Allocate VAR_EXPR with NUMBER_OF_FORALL_INDEX elements. */
10120 var_expr
= XCNEWVEC (gfc_expr
*, total_var
);
10123 /* The information about FORALL iterator, including FORALL indices start, end
10124 and stride. An outer FORALL indice cannot appear in start, end or stride. */
10125 for (fa
= code
->ext
.forall_iterator
; fa
; fa
= fa
->next
)
10127 /* Fortran 20008: C738 (R753). */
10128 if (fa
->var
->ref
&& fa
->var
->ref
->type
== REF_ARRAY
)
10130 gfc_error ("FORALL index-name at %L must be a scalar variable "
10131 "of type integer", &fa
->var
->where
);
10135 /* Check if any outer FORALL index name is the same as the current
10137 for (i
= 0; i
< nvar
; i
++)
10139 if (fa
->var
->symtree
->n
.sym
== var_expr
[i
]->symtree
->n
.sym
)
10140 gfc_error ("An outer FORALL construct already has an index "
10141 "with this name %L", &fa
->var
->where
);
10144 /* Record the current FORALL index. */
10145 var_expr
[nvar
] = gfc_copy_expr (fa
->var
);
10149 /* No memory leak. */
10150 gcc_assert (nvar
<= total_var
);
10153 /* Resolve the FORALL body. */
10154 gfc_resolve_forall_body (code
, nvar
, var_expr
);
10156 /* May call gfc_resolve_forall to resolve the inner FORALL loop. */
10157 gfc_resolve_blocks (code
->block
, ns
);
10161 /* Free only the VAR_EXPRs allocated in this frame. */
10162 for (i
= nvar
; i
< tmp
; i
++)
10163 gfc_free_expr (var_expr
[i
]);
10167 /* We are in the outermost FORALL construct. */
10168 gcc_assert (forall_save
== 0);
10170 /* VAR_EXPR is not needed any more. */
10177 /* Resolve a BLOCK construct statement. */
10180 resolve_block_construct (gfc_code
* code
)
10182 /* Resolve the BLOCK's namespace. */
10183 gfc_resolve (code
->ext
.block
.ns
);
10185 /* For an ASSOCIATE block, the associations (and their targets) are already
10186 resolved during resolve_symbol. */
10190 /* Resolve lists of blocks found in IF, SELECT CASE, WHERE, FORALL, GOTO and
10194 gfc_resolve_blocks (gfc_code
*b
, gfc_namespace
*ns
)
10198 for (; b
; b
= b
->block
)
10200 t
= gfc_resolve_expr (b
->expr1
);
10201 if (!gfc_resolve_expr (b
->expr2
))
10207 if (t
&& b
->expr1
!= NULL
10208 && (b
->expr1
->ts
.type
!= BT_LOGICAL
|| b
->expr1
->rank
!= 0))
10209 gfc_error ("IF clause at %L requires a scalar LOGICAL expression",
10215 && b
->expr1
!= NULL
10216 && (b
->expr1
->ts
.type
!= BT_LOGICAL
|| b
->expr1
->rank
== 0))
10217 gfc_error ("WHERE/ELSEWHERE clause at %L requires a LOGICAL array",
10222 resolve_branch (b
->label1
, b
);
10226 resolve_block_construct (b
);
10230 case EXEC_SELECT_TYPE
:
10233 case EXEC_DO_WHILE
:
10234 case EXEC_DO_CONCURRENT
:
10235 case EXEC_CRITICAL
:
10238 case EXEC_IOLENGTH
:
10242 case EXEC_OMP_ATOMIC
:
10243 case EXEC_OACC_ATOMIC
:
10245 gfc_omp_atomic_op aop
10246 = (gfc_omp_atomic_op
) (b
->ext
.omp_atomic
& GFC_OMP_ATOMIC_MASK
);
10248 /* Verify this before calling gfc_resolve_code, which might
10250 gcc_assert (b
->next
&& b
->next
->op
== EXEC_ASSIGN
);
10251 gcc_assert (((aop
!= GFC_OMP_ATOMIC_CAPTURE
)
10252 && b
->next
->next
== NULL
)
10253 || ((aop
== GFC_OMP_ATOMIC_CAPTURE
)
10254 && b
->next
->next
!= NULL
10255 && b
->next
->next
->op
== EXEC_ASSIGN
10256 && b
->next
->next
->next
== NULL
));
10260 case EXEC_OACC_PARALLEL_LOOP
:
10261 case EXEC_OACC_PARALLEL
:
10262 case EXEC_OACC_KERNELS_LOOP
:
10263 case EXEC_OACC_KERNELS
:
10264 case EXEC_OACC_DATA
:
10265 case EXEC_OACC_HOST_DATA
:
10266 case EXEC_OACC_LOOP
:
10267 case EXEC_OACC_UPDATE
:
10268 case EXEC_OACC_WAIT
:
10269 case EXEC_OACC_CACHE
:
10270 case EXEC_OACC_ENTER_DATA
:
10271 case EXEC_OACC_EXIT_DATA
:
10272 case EXEC_OACC_ROUTINE
:
10273 case EXEC_OMP_CRITICAL
:
10274 case EXEC_OMP_DISTRIBUTE
:
10275 case EXEC_OMP_DISTRIBUTE_PARALLEL_DO
:
10276 case EXEC_OMP_DISTRIBUTE_PARALLEL_DO_SIMD
:
10277 case EXEC_OMP_DISTRIBUTE_SIMD
:
10279 case EXEC_OMP_DO_SIMD
:
10280 case EXEC_OMP_MASTER
:
10281 case EXEC_OMP_ORDERED
:
10282 case EXEC_OMP_PARALLEL
:
10283 case EXEC_OMP_PARALLEL_DO
:
10284 case EXEC_OMP_PARALLEL_DO_SIMD
:
10285 case EXEC_OMP_PARALLEL_SECTIONS
:
10286 case EXEC_OMP_PARALLEL_WORKSHARE
:
10287 case EXEC_OMP_SECTIONS
:
10288 case EXEC_OMP_SIMD
:
10289 case EXEC_OMP_SINGLE
:
10290 case EXEC_OMP_TARGET
:
10291 case EXEC_OMP_TARGET_DATA
:
10292 case EXEC_OMP_TARGET_ENTER_DATA
:
10293 case EXEC_OMP_TARGET_EXIT_DATA
:
10294 case EXEC_OMP_TARGET_PARALLEL
:
10295 case EXEC_OMP_TARGET_PARALLEL_DO
:
10296 case EXEC_OMP_TARGET_PARALLEL_DO_SIMD
:
10297 case EXEC_OMP_TARGET_SIMD
:
10298 case EXEC_OMP_TARGET_TEAMS
:
10299 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE
:
10300 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO
:
10301 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
10302 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_SIMD
:
10303 case EXEC_OMP_TARGET_UPDATE
:
10304 case EXEC_OMP_TASK
:
10305 case EXEC_OMP_TASKGROUP
:
10306 case EXEC_OMP_TASKLOOP
:
10307 case EXEC_OMP_TASKLOOP_SIMD
:
10308 case EXEC_OMP_TASKWAIT
:
10309 case EXEC_OMP_TASKYIELD
:
10310 case EXEC_OMP_TEAMS
:
10311 case EXEC_OMP_TEAMS_DISTRIBUTE
:
10312 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO
:
10313 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
10314 case EXEC_OMP_TEAMS_DISTRIBUTE_SIMD
:
10315 case EXEC_OMP_WORKSHARE
:
10319 gfc_internal_error ("gfc_resolve_blocks(): Bad block type");
10322 gfc_resolve_code (b
->next
, ns
);
10327 /* Does everything to resolve an ordinary assignment. Returns true
10328 if this is an interface assignment. */
10330 resolve_ordinary_assign (gfc_code
*code
, gfc_namespace
*ns
)
10337 symbol_attribute attr
;
10339 if (gfc_extend_assign (code
, ns
))
10343 if (code
->op
== EXEC_ASSIGN_CALL
)
10345 lhs
= code
->ext
.actual
->expr
;
10346 rhsptr
= &code
->ext
.actual
->next
->expr
;
10350 gfc_actual_arglist
* args
;
10351 gfc_typebound_proc
* tbp
;
10353 gcc_assert (code
->op
== EXEC_COMPCALL
);
10355 args
= code
->expr1
->value
.compcall
.actual
;
10357 rhsptr
= &args
->next
->expr
;
10359 tbp
= code
->expr1
->value
.compcall
.tbp
;
10360 gcc_assert (!tbp
->is_generic
);
10363 /* Make a temporary rhs when there is a default initializer
10364 and rhs is the same symbol as the lhs. */
10365 if ((*rhsptr
)->expr_type
== EXPR_VARIABLE
10366 && (*rhsptr
)->symtree
->n
.sym
->ts
.type
== BT_DERIVED
10367 && gfc_has_default_initializer ((*rhsptr
)->symtree
->n
.sym
->ts
.u
.derived
)
10368 && (lhs
->symtree
->n
.sym
== (*rhsptr
)->symtree
->n
.sym
))
10369 *rhsptr
= gfc_get_parentheses (*rhsptr
);
10378 && !gfc_notify_std (GFC_STD_GNU
, "BOZ literal at %L outside "
10379 "a DATA statement and outside INT/REAL/DBLE/CMPLX",
10383 /* Handle the case of a BOZ literal on the RHS. */
10384 if (rhs
->is_boz
&& lhs
->ts
.type
!= BT_INTEGER
)
10387 if (warn_surprising
)
10388 gfc_warning (OPT_Wsurprising
,
10389 "BOZ literal at %L is bitwise transferred "
10390 "non-integer symbol %qs", &code
->loc
,
10391 lhs
->symtree
->n
.sym
->name
);
10393 if (!gfc_convert_boz (rhs
, &lhs
->ts
))
10395 if ((rc
= gfc_range_check (rhs
)) != ARITH_OK
)
10397 if (rc
== ARITH_UNDERFLOW
)
10398 gfc_error ("Arithmetic underflow of bit-wise transferred BOZ at %L"
10399 ". This check can be disabled with the option "
10400 "%<-fno-range-check%>", &rhs
->where
);
10401 else if (rc
== ARITH_OVERFLOW
)
10402 gfc_error ("Arithmetic overflow of bit-wise transferred BOZ at %L"
10403 ". This check can be disabled with the option "
10404 "%<-fno-range-check%>", &rhs
->where
);
10405 else if (rc
== ARITH_NAN
)
10406 gfc_error ("Arithmetic NaN of bit-wise transferred BOZ at %L"
10407 ". This check can be disabled with the option "
10408 "%<-fno-range-check%>", &rhs
->where
);
10413 if (lhs
->ts
.type
== BT_CHARACTER
10414 && warn_character_truncation
)
10416 HOST_WIDE_INT llen
= 0, rlen
= 0;
10417 if (lhs
->ts
.u
.cl
!= NULL
10418 && lhs
->ts
.u
.cl
->length
!= NULL
10419 && lhs
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
)
10420 llen
= gfc_mpz_get_hwi (lhs
->ts
.u
.cl
->length
->value
.integer
);
10422 if (rhs
->expr_type
== EXPR_CONSTANT
)
10423 rlen
= rhs
->value
.character
.length
;
10425 else if (rhs
->ts
.u
.cl
!= NULL
10426 && rhs
->ts
.u
.cl
->length
!= NULL
10427 && rhs
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
)
10428 rlen
= gfc_mpz_get_hwi (rhs
->ts
.u
.cl
->length
->value
.integer
);
10430 if (rlen
&& llen
&& rlen
> llen
)
10431 gfc_warning_now (OPT_Wcharacter_truncation
,
10432 "CHARACTER expression will be truncated "
10433 "in assignment (%ld/%ld) at %L",
10434 (long) llen
, (long) rlen
, &code
->loc
);
10437 /* Ensure that a vector index expression for the lvalue is evaluated
10438 to a temporary if the lvalue symbol is referenced in it. */
10441 for (ref
= lhs
->ref
; ref
; ref
= ref
->next
)
10442 if (ref
->type
== REF_ARRAY
)
10444 for (n
= 0; n
< ref
->u
.ar
.dimen
; n
++)
10445 if (ref
->u
.ar
.dimen_type
[n
] == DIMEN_VECTOR
10446 && gfc_find_sym_in_expr (lhs
->symtree
->n
.sym
,
10447 ref
->u
.ar
.start
[n
]))
10449 = gfc_get_parentheses (ref
->u
.ar
.start
[n
]);
10453 if (gfc_pure (NULL
))
10455 if (lhs
->ts
.type
== BT_DERIVED
10456 && lhs
->expr_type
== EXPR_VARIABLE
10457 && lhs
->ts
.u
.derived
->attr
.pointer_comp
10458 && rhs
->expr_type
== EXPR_VARIABLE
10459 && (gfc_impure_variable (rhs
->symtree
->n
.sym
)
10460 || gfc_is_coindexed (rhs
)))
10462 /* F2008, C1283. */
10463 if (gfc_is_coindexed (rhs
))
10464 gfc_error ("Coindexed expression at %L is assigned to "
10465 "a derived type variable with a POINTER "
10466 "component in a PURE procedure",
10469 gfc_error ("The impure variable at %L is assigned to "
10470 "a derived type variable with a POINTER "
10471 "component in a PURE procedure (12.6)",
10476 /* Fortran 2008, C1283. */
10477 if (gfc_is_coindexed (lhs
))
10479 gfc_error ("Assignment to coindexed variable at %L in a PURE "
10480 "procedure", &rhs
->where
);
10485 if (gfc_implicit_pure (NULL
))
10487 if (lhs
->expr_type
== EXPR_VARIABLE
10488 && lhs
->symtree
->n
.sym
!= gfc_current_ns
->proc_name
10489 && lhs
->symtree
->n
.sym
->ns
!= gfc_current_ns
)
10490 gfc_unset_implicit_pure (NULL
);
10492 if (lhs
->ts
.type
== BT_DERIVED
10493 && lhs
->expr_type
== EXPR_VARIABLE
10494 && lhs
->ts
.u
.derived
->attr
.pointer_comp
10495 && rhs
->expr_type
== EXPR_VARIABLE
10496 && (gfc_impure_variable (rhs
->symtree
->n
.sym
)
10497 || gfc_is_coindexed (rhs
)))
10498 gfc_unset_implicit_pure (NULL
);
10500 /* Fortran 2008, C1283. */
10501 if (gfc_is_coindexed (lhs
))
10502 gfc_unset_implicit_pure (NULL
);
10505 /* F2008, 7.2.1.2. */
10506 attr
= gfc_expr_attr (lhs
);
10507 if (lhs
->ts
.type
== BT_CLASS
&& attr
.allocatable
)
10509 if (attr
.codimension
)
10511 gfc_error ("Assignment to polymorphic coarray at %L is not "
10512 "permitted", &lhs
->where
);
10515 if (!gfc_notify_std (GFC_STD_F2008
, "Assignment to an allocatable "
10516 "polymorphic variable at %L", &lhs
->where
))
10518 if (!flag_realloc_lhs
)
10520 gfc_error ("Assignment to an allocatable polymorphic variable at %L "
10521 "requires %<-frealloc-lhs%>", &lhs
->where
);
10525 else if (lhs
->ts
.type
== BT_CLASS
)
10527 gfc_error ("Nonallocatable variable must not be polymorphic in intrinsic "
10528 "assignment at %L - check that there is a matching specific "
10529 "subroutine for '=' operator", &lhs
->where
);
10533 bool lhs_coindexed
= gfc_is_coindexed (lhs
);
10535 /* F2008, Section 7.2.1.2. */
10536 if (lhs_coindexed
&& gfc_has_ultimate_allocatable (lhs
))
10538 gfc_error ("Coindexed variable must not have an allocatable ultimate "
10539 "component in assignment at %L", &lhs
->where
);
10543 /* Assign the 'data' of a class object to a derived type. */
10544 if (lhs
->ts
.type
== BT_DERIVED
10545 && rhs
->ts
.type
== BT_CLASS
10546 && rhs
->expr_type
!= EXPR_ARRAY
)
10547 gfc_add_data_component (rhs
);
10549 /* Make sure there is a vtable and, in particular, a _copy for the
10551 if (UNLIMITED_POLY (lhs
) && lhs
->rank
&& rhs
->ts
.type
!= BT_CLASS
)
10552 gfc_find_vtab (&rhs
->ts
);
10554 bool caf_convert_to_send
= flag_coarray
== GFC_FCOARRAY_LIB
10556 || (code
->expr2
->expr_type
== EXPR_FUNCTION
10557 && code
->expr2
->value
.function
.isym
10558 && code
->expr2
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
10559 && (code
->expr1
->rank
== 0 || code
->expr2
->rank
!= 0)
10560 && !gfc_expr_attr (rhs
).allocatable
10561 && !gfc_has_vector_subscript (rhs
)));
10563 gfc_check_assign (lhs
, rhs
, 1, !caf_convert_to_send
);
10565 /* Insert a GFC_ISYM_CAF_SEND intrinsic, when the LHS is a coindexed variable.
10566 Additionally, insert this code when the RHS is a CAF as we then use the
10567 GFC_ISYM_CAF_SEND intrinsic just to avoid a temporary; but do not do so if
10568 the LHS is (re)allocatable or has a vector subscript. If the LHS is a
10569 noncoindexed array and the RHS is a coindexed scalar, use the normal code
10571 if (caf_convert_to_send
)
10573 if (code
->expr2
->expr_type
== EXPR_FUNCTION
10574 && code
->expr2
->value
.function
.isym
10575 && code
->expr2
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
)
10576 remove_caf_get_intrinsic (code
->expr2
);
10577 code
->op
= EXEC_CALL
;
10578 gfc_get_sym_tree (GFC_PREFIX ("caf_send"), ns
, &code
->symtree
, true);
10579 code
->resolved_sym
= code
->symtree
->n
.sym
;
10580 code
->resolved_sym
->attr
.flavor
= FL_PROCEDURE
;
10581 code
->resolved_sym
->attr
.intrinsic
= 1;
10582 code
->resolved_sym
->attr
.subroutine
= 1;
10583 code
->resolved_isym
= gfc_intrinsic_subroutine_by_id (GFC_ISYM_CAF_SEND
);
10584 gfc_commit_symbol (code
->resolved_sym
);
10585 code
->ext
.actual
= gfc_get_actual_arglist ();
10586 code
->ext
.actual
->expr
= lhs
;
10587 code
->ext
.actual
->next
= gfc_get_actual_arglist ();
10588 code
->ext
.actual
->next
->expr
= rhs
;
10589 code
->expr1
= NULL
;
10590 code
->expr2
= NULL
;
10597 /* Add a component reference onto an expression. */
10600 add_comp_ref (gfc_expr
*e
, gfc_component
*c
)
10605 ref
= &((*ref
)->next
);
10606 *ref
= gfc_get_ref ();
10607 (*ref
)->type
= REF_COMPONENT
;
10608 (*ref
)->u
.c
.sym
= e
->ts
.u
.derived
;
10609 (*ref
)->u
.c
.component
= c
;
10612 /* Add a full array ref, as necessary. */
10615 gfc_add_full_array_ref (e
, c
->as
);
10616 e
->rank
= c
->as
->rank
;
10621 /* Build an assignment. Keep the argument 'op' for future use, so that
10622 pointer assignments can be made. */
10625 build_assignment (gfc_exec_op op
, gfc_expr
*expr1
, gfc_expr
*expr2
,
10626 gfc_component
*comp1
, gfc_component
*comp2
, locus loc
)
10628 gfc_code
*this_code
;
10630 this_code
= gfc_get_code (op
);
10631 this_code
->next
= NULL
;
10632 this_code
->expr1
= gfc_copy_expr (expr1
);
10633 this_code
->expr2
= gfc_copy_expr (expr2
);
10634 this_code
->loc
= loc
;
10635 if (comp1
&& comp2
)
10637 add_comp_ref (this_code
->expr1
, comp1
);
10638 add_comp_ref (this_code
->expr2
, comp2
);
10645 /* Makes a temporary variable expression based on the characteristics of
10646 a given variable expression. */
10649 get_temp_from_expr (gfc_expr
*e
, gfc_namespace
*ns
)
10651 static int serial
= 0;
10652 char name
[GFC_MAX_SYMBOL_LEN
];
10654 gfc_array_spec
*as
;
10655 gfc_array_ref
*aref
;
10658 sprintf (name
, GFC_PREFIX("DA%d"), serial
++);
10659 gfc_get_sym_tree (name
, ns
, &tmp
, false);
10660 gfc_add_type (tmp
->n
.sym
, &e
->ts
, NULL
);
10662 if (e
->expr_type
== EXPR_CONSTANT
&& e
->ts
.type
== BT_CHARACTER
)
10663 tmp
->n
.sym
->ts
.u
.cl
->length
= gfc_get_int_expr (gfc_charlen_int_kind
,
10665 e
->value
.character
.length
);
10671 /* Obtain the arrayspec for the temporary. */
10672 if (e
->rank
&& e
->expr_type
!= EXPR_ARRAY
10673 && e
->expr_type
!= EXPR_FUNCTION
10674 && e
->expr_type
!= EXPR_OP
)
10676 aref
= gfc_find_array_ref (e
);
10677 if (e
->expr_type
== EXPR_VARIABLE
10678 && e
->symtree
->n
.sym
->as
== aref
->as
)
10682 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
10683 if (ref
->type
== REF_COMPONENT
10684 && ref
->u
.c
.component
->as
== aref
->as
)
10692 /* Add the attributes and the arrayspec to the temporary. */
10693 tmp
->n
.sym
->attr
= gfc_expr_attr (e
);
10694 tmp
->n
.sym
->attr
.function
= 0;
10695 tmp
->n
.sym
->attr
.result
= 0;
10696 tmp
->n
.sym
->attr
.flavor
= FL_VARIABLE
;
10697 tmp
->n
.sym
->attr
.dummy
= 0;
10698 tmp
->n
.sym
->attr
.intent
= INTENT_UNKNOWN
;
10702 tmp
->n
.sym
->as
= gfc_copy_array_spec (as
);
10705 if (as
->type
== AS_DEFERRED
)
10706 tmp
->n
.sym
->attr
.allocatable
= 1;
10708 else if (e
->rank
&& (e
->expr_type
== EXPR_ARRAY
10709 || e
->expr_type
== EXPR_FUNCTION
10710 || e
->expr_type
== EXPR_OP
))
10712 tmp
->n
.sym
->as
= gfc_get_array_spec ();
10713 tmp
->n
.sym
->as
->type
= AS_DEFERRED
;
10714 tmp
->n
.sym
->as
->rank
= e
->rank
;
10715 tmp
->n
.sym
->attr
.allocatable
= 1;
10716 tmp
->n
.sym
->attr
.dimension
= 1;
10719 tmp
->n
.sym
->attr
.dimension
= 0;
10721 gfc_set_sym_referenced (tmp
->n
.sym
);
10722 gfc_commit_symbol (tmp
->n
.sym
);
10723 e
= gfc_lval_expr_from_sym (tmp
->n
.sym
);
10725 /* Should the lhs be a section, use its array ref for the
10726 temporary expression. */
10727 if (aref
&& aref
->type
!= AR_FULL
)
10729 gfc_free_ref_list (e
->ref
);
10730 e
->ref
= gfc_copy_ref (ref
);
10736 /* Add one line of code to the code chain, making sure that 'head' and
10737 'tail' are appropriately updated. */
10740 add_code_to_chain (gfc_code
**this_code
, gfc_code
**head
, gfc_code
**tail
)
10742 gcc_assert (this_code
);
10744 *head
= *tail
= *this_code
;
10746 *tail
= gfc_append_code (*tail
, *this_code
);
10751 /* Counts the potential number of part array references that would
10752 result from resolution of typebound defined assignments. */
10755 nonscalar_typebound_assign (gfc_symbol
*derived
, int depth
)
10758 int c_depth
= 0, t_depth
;
10760 for (c
= derived
->components
; c
; c
= c
->next
)
10762 if ((!gfc_bt_struct (c
->ts
.type
)
10764 || c
->attr
.allocatable
10765 || c
->attr
.proc_pointer_comp
10766 || c
->attr
.class_pointer
10767 || c
->attr
.proc_pointer
)
10768 && !c
->attr
.defined_assign_comp
)
10771 if (c
->as
&& c_depth
== 0)
10774 if (c
->ts
.u
.derived
->attr
.defined_assign_comp
)
10775 t_depth
= nonscalar_typebound_assign (c
->ts
.u
.derived
,
10780 c_depth
= t_depth
> c_depth
? t_depth
: c_depth
;
10782 return depth
+ c_depth
;
10786 /* Implement 7.2.1.3 of the F08 standard:
10787 "An intrinsic assignment where the variable is of derived type is
10788 performed as if each component of the variable were assigned from the
10789 corresponding component of expr using pointer assignment (7.2.2) for
10790 each pointer component, defined assignment for each nonpointer
10791 nonallocatable component of a type that has a type-bound defined
10792 assignment consistent with the component, intrinsic assignment for
10793 each other nonpointer nonallocatable component, ..."
10795 The pointer assignments are taken care of by the intrinsic
10796 assignment of the structure itself. This function recursively adds
10797 defined assignments where required. The recursion is accomplished
10798 by calling gfc_resolve_code.
10800 When the lhs in a defined assignment has intent INOUT, we need a
10801 temporary for the lhs. In pseudo-code:
10803 ! Only call function lhs once.
10804 if (lhs is not a constant or an variable)
10807 ! Do the intrinsic assignment
10809 ! Now do the defined assignments
10810 do over components with typebound defined assignment [%cmp]
10811 #if one component's assignment procedure is INOUT
10813 #if expr2 non-variable
10819 t1%cmp {defined=} expr2%cmp
10825 expr1%cmp {defined=} expr2%cmp
10829 /* The temporary assignments have to be put on top of the additional
10830 code to avoid the result being changed by the intrinsic assignment.
10832 static int component_assignment_level
= 0;
10833 static gfc_code
*tmp_head
= NULL
, *tmp_tail
= NULL
;
10836 generate_component_assignments (gfc_code
**code
, gfc_namespace
*ns
)
10838 gfc_component
*comp1
, *comp2
;
10839 gfc_code
*this_code
= NULL
, *head
= NULL
, *tail
= NULL
;
10841 int error_count
, depth
;
10843 gfc_get_errors (NULL
, &error_count
);
10845 /* Filter out continuing processing after an error. */
10847 || (*code
)->expr1
->ts
.type
!= BT_DERIVED
10848 || (*code
)->expr2
->ts
.type
!= BT_DERIVED
)
10851 /* TODO: Handle more than one part array reference in assignments. */
10852 depth
= nonscalar_typebound_assign ((*code
)->expr1
->ts
.u
.derived
,
10853 (*code
)->expr1
->rank
? 1 : 0);
10856 gfc_warning (0, "TODO: type-bound defined assignment(s) at %L not "
10857 "done because multiple part array references would "
10858 "occur in intermediate expressions.", &(*code
)->loc
);
10862 component_assignment_level
++;
10864 /* Create a temporary so that functions get called only once. */
10865 if ((*code
)->expr2
->expr_type
!= EXPR_VARIABLE
10866 && (*code
)->expr2
->expr_type
!= EXPR_CONSTANT
)
10868 gfc_expr
*tmp_expr
;
10870 /* Assign the rhs to the temporary. */
10871 tmp_expr
= get_temp_from_expr ((*code
)->expr1
, ns
);
10872 this_code
= build_assignment (EXEC_ASSIGN
,
10873 tmp_expr
, (*code
)->expr2
,
10874 NULL
, NULL
, (*code
)->loc
);
10875 /* Add the code and substitute the rhs expression. */
10876 add_code_to_chain (&this_code
, &tmp_head
, &tmp_tail
);
10877 gfc_free_expr ((*code
)->expr2
);
10878 (*code
)->expr2
= tmp_expr
;
10881 /* Do the intrinsic assignment. This is not needed if the lhs is one
10882 of the temporaries generated here, since the intrinsic assignment
10883 to the final result already does this. */
10884 if ((*code
)->expr1
->symtree
->n
.sym
->name
[2] != '@')
10886 this_code
= build_assignment (EXEC_ASSIGN
,
10887 (*code
)->expr1
, (*code
)->expr2
,
10888 NULL
, NULL
, (*code
)->loc
);
10889 add_code_to_chain (&this_code
, &head
, &tail
);
10892 comp1
= (*code
)->expr1
->ts
.u
.derived
->components
;
10893 comp2
= (*code
)->expr2
->ts
.u
.derived
->components
;
10896 for (; comp1
; comp1
= comp1
->next
, comp2
= comp2
->next
)
10898 bool inout
= false;
10900 /* The intrinsic assignment does the right thing for pointers
10901 of all kinds and allocatable components. */
10902 if (!gfc_bt_struct (comp1
->ts
.type
)
10903 || comp1
->attr
.pointer
10904 || comp1
->attr
.allocatable
10905 || comp1
->attr
.proc_pointer_comp
10906 || comp1
->attr
.class_pointer
10907 || comp1
->attr
.proc_pointer
)
10910 /* Make an assigment for this component. */
10911 this_code
= build_assignment (EXEC_ASSIGN
,
10912 (*code
)->expr1
, (*code
)->expr2
,
10913 comp1
, comp2
, (*code
)->loc
);
10915 /* Convert the assignment if there is a defined assignment for
10916 this type. Otherwise, using the call from gfc_resolve_code,
10917 recurse into its components. */
10918 gfc_resolve_code (this_code
, ns
);
10920 if (this_code
->op
== EXEC_ASSIGN_CALL
)
10922 gfc_formal_arglist
*dummy_args
;
10924 /* Check that there is a typebound defined assignment. If not,
10925 then this must be a module defined assignment. We cannot
10926 use the defined_assign_comp attribute here because it must
10927 be this derived type that has the defined assignment and not
10929 if (!(comp1
->ts
.u
.derived
->f2k_derived
10930 && comp1
->ts
.u
.derived
->f2k_derived
10931 ->tb_op
[INTRINSIC_ASSIGN
]))
10933 gfc_free_statements (this_code
);
10938 /* If the first argument of the subroutine has intent INOUT
10939 a temporary must be generated and used instead. */
10940 rsym
= this_code
->resolved_sym
;
10941 dummy_args
= gfc_sym_get_dummy_args (rsym
);
10943 && dummy_args
->sym
->attr
.intent
== INTENT_INOUT
)
10945 gfc_code
*temp_code
;
10948 /* Build the temporary required for the assignment and put
10949 it at the head of the generated code. */
10952 t1
= get_temp_from_expr ((*code
)->expr1
, ns
);
10953 temp_code
= build_assignment (EXEC_ASSIGN
,
10954 t1
, (*code
)->expr1
,
10955 NULL
, NULL
, (*code
)->loc
);
10957 /* For allocatable LHS, check whether it is allocated. Note
10958 that allocatable components with defined assignment are
10959 not yet support. See PR 57696. */
10960 if ((*code
)->expr1
->symtree
->n
.sym
->attr
.allocatable
)
10964 gfc_lval_expr_from_sym ((*code
)->expr1
->symtree
->n
.sym
);
10965 block
= gfc_get_code (EXEC_IF
);
10966 block
->block
= gfc_get_code (EXEC_IF
);
10967 block
->block
->expr1
10968 = gfc_build_intrinsic_call (ns
,
10969 GFC_ISYM_ALLOCATED
, "allocated",
10970 (*code
)->loc
, 1, e
);
10971 block
->block
->next
= temp_code
;
10974 add_code_to_chain (&temp_code
, &tmp_head
, &tmp_tail
);
10977 /* Replace the first actual arg with the component of the
10979 gfc_free_expr (this_code
->ext
.actual
->expr
);
10980 this_code
->ext
.actual
->expr
= gfc_copy_expr (t1
);
10981 add_comp_ref (this_code
->ext
.actual
->expr
, comp1
);
10983 /* If the LHS variable is allocatable and wasn't allocated and
10984 the temporary is allocatable, pointer assign the address of
10985 the freshly allocated LHS to the temporary. */
10986 if ((*code
)->expr1
->symtree
->n
.sym
->attr
.allocatable
10987 && gfc_expr_attr ((*code
)->expr1
).allocatable
)
10992 cond
= gfc_get_expr ();
10993 cond
->ts
.type
= BT_LOGICAL
;
10994 cond
->ts
.kind
= gfc_default_logical_kind
;
10995 cond
->expr_type
= EXPR_OP
;
10996 cond
->where
= (*code
)->loc
;
10997 cond
->value
.op
.op
= INTRINSIC_NOT
;
10998 cond
->value
.op
.op1
= gfc_build_intrinsic_call (ns
,
10999 GFC_ISYM_ALLOCATED
, "allocated",
11000 (*code
)->loc
, 1, gfc_copy_expr (t1
));
11001 block
= gfc_get_code (EXEC_IF
);
11002 block
->block
= gfc_get_code (EXEC_IF
);
11003 block
->block
->expr1
= cond
;
11004 block
->block
->next
= build_assignment (EXEC_POINTER_ASSIGN
,
11005 t1
, (*code
)->expr1
,
11006 NULL
, NULL
, (*code
)->loc
);
11007 add_code_to_chain (&block
, &head
, &tail
);
11011 else if (this_code
->op
== EXEC_ASSIGN
&& !this_code
->next
)
11013 /* Don't add intrinsic assignments since they are already
11014 effected by the intrinsic assignment of the structure. */
11015 gfc_free_statements (this_code
);
11020 add_code_to_chain (&this_code
, &head
, &tail
);
11024 /* Transfer the value to the final result. */
11025 this_code
= build_assignment (EXEC_ASSIGN
,
11026 (*code
)->expr1
, t1
,
11027 comp1
, comp2
, (*code
)->loc
);
11028 add_code_to_chain (&this_code
, &head
, &tail
);
11032 /* Put the temporary assignments at the top of the generated code. */
11033 if (tmp_head
&& component_assignment_level
== 1)
11035 gfc_append_code (tmp_head
, head
);
11037 tmp_head
= tmp_tail
= NULL
;
11040 // If we did a pointer assignment - thus, we need to ensure that the LHS is
11041 // not accidentally deallocated. Hence, nullify t1.
11042 if (t1
&& (*code
)->expr1
->symtree
->n
.sym
->attr
.allocatable
11043 && gfc_expr_attr ((*code
)->expr1
).allocatable
)
11049 e
= gfc_lval_expr_from_sym ((*code
)->expr1
->symtree
->n
.sym
);
11050 cond
= gfc_build_intrinsic_call (ns
, GFC_ISYM_ASSOCIATED
, "associated",
11051 (*code
)->loc
, 2, gfc_copy_expr (t1
), e
);
11052 block
= gfc_get_code (EXEC_IF
);
11053 block
->block
= gfc_get_code (EXEC_IF
);
11054 block
->block
->expr1
= cond
;
11055 block
->block
->next
= build_assignment (EXEC_POINTER_ASSIGN
,
11056 t1
, gfc_get_null_expr (&(*code
)->loc
),
11057 NULL
, NULL
, (*code
)->loc
);
11058 gfc_append_code (tail
, block
);
11062 /* Now attach the remaining code chain to the input code. Step on
11063 to the end of the new code since resolution is complete. */
11064 gcc_assert ((*code
)->op
== EXEC_ASSIGN
);
11065 tail
->next
= (*code
)->next
;
11066 /* Overwrite 'code' because this would place the intrinsic assignment
11067 before the temporary for the lhs is created. */
11068 gfc_free_expr ((*code
)->expr1
);
11069 gfc_free_expr ((*code
)->expr2
);
11075 component_assignment_level
--;
11079 /* F2008: Pointer function assignments are of the form:
11080 ptr_fcn (args) = expr
11081 This function breaks these assignments into two statements:
11082 temporary_pointer => ptr_fcn(args)
11083 temporary_pointer = expr */
11086 resolve_ptr_fcn_assign (gfc_code
**code
, gfc_namespace
*ns
)
11088 gfc_expr
*tmp_ptr_expr
;
11089 gfc_code
*this_code
;
11090 gfc_component
*comp
;
11093 if ((*code
)->expr1
->expr_type
!= EXPR_FUNCTION
)
11096 /* Even if standard does not support this feature, continue to build
11097 the two statements to avoid upsetting frontend_passes.c. */
11098 gfc_notify_std (GFC_STD_F2008
, "Pointer procedure assignment at "
11099 "%L", &(*code
)->loc
);
11101 comp
= gfc_get_proc_ptr_comp ((*code
)->expr1
);
11104 s
= comp
->ts
.interface
;
11106 s
= (*code
)->expr1
->symtree
->n
.sym
;
11108 if (s
== NULL
|| !s
->result
->attr
.pointer
)
11110 gfc_error ("The function result on the lhs of the assignment at "
11111 "%L must have the pointer attribute.",
11112 &(*code
)->expr1
->where
);
11113 (*code
)->op
= EXEC_NOP
;
11117 tmp_ptr_expr
= get_temp_from_expr ((*code
)->expr2
, ns
);
11119 /* get_temp_from_expression is set up for ordinary assignments. To that
11120 end, where array bounds are not known, arrays are made allocatable.
11121 Change the temporary to a pointer here. */
11122 tmp_ptr_expr
->symtree
->n
.sym
->attr
.pointer
= 1;
11123 tmp_ptr_expr
->symtree
->n
.sym
->attr
.allocatable
= 0;
11124 tmp_ptr_expr
->where
= (*code
)->loc
;
11126 this_code
= build_assignment (EXEC_ASSIGN
,
11127 tmp_ptr_expr
, (*code
)->expr2
,
11128 NULL
, NULL
, (*code
)->loc
);
11129 this_code
->next
= (*code
)->next
;
11130 (*code
)->next
= this_code
;
11131 (*code
)->op
= EXEC_POINTER_ASSIGN
;
11132 (*code
)->expr2
= (*code
)->expr1
;
11133 (*code
)->expr1
= tmp_ptr_expr
;
11139 /* Deferred character length assignments from an operator expression
11140 require a temporary because the character length of the lhs can
11141 change in the course of the assignment. */
11144 deferred_op_assign (gfc_code
**code
, gfc_namespace
*ns
)
11146 gfc_expr
*tmp_expr
;
11147 gfc_code
*this_code
;
11149 if (!((*code
)->expr1
->ts
.type
== BT_CHARACTER
11150 && (*code
)->expr1
->ts
.deferred
&& (*code
)->expr1
->rank
11151 && (*code
)->expr2
->expr_type
== EXPR_OP
))
11154 if (!gfc_check_dependency ((*code
)->expr1
, (*code
)->expr2
, 1))
11157 tmp_expr
= get_temp_from_expr ((*code
)->expr1
, ns
);
11158 tmp_expr
->where
= (*code
)->loc
;
11160 /* A new charlen is required to ensure that the variable string
11161 length is different to that of the original lhs. */
11162 tmp_expr
->ts
.u
.cl
= gfc_get_charlen();
11163 tmp_expr
->symtree
->n
.sym
->ts
.u
.cl
= tmp_expr
->ts
.u
.cl
;
11164 tmp_expr
->ts
.u
.cl
->next
= (*code
)->expr2
->ts
.u
.cl
->next
;
11165 (*code
)->expr2
->ts
.u
.cl
->next
= tmp_expr
->ts
.u
.cl
;
11167 tmp_expr
->symtree
->n
.sym
->ts
.deferred
= 1;
11169 this_code
= build_assignment (EXEC_ASSIGN
,
11171 gfc_copy_expr (tmp_expr
),
11172 NULL
, NULL
, (*code
)->loc
);
11174 (*code
)->expr1
= tmp_expr
;
11176 this_code
->next
= (*code
)->next
;
11177 (*code
)->next
= this_code
;
11183 /* Given a block of code, recursively resolve everything pointed to by this
11187 gfc_resolve_code (gfc_code
*code
, gfc_namespace
*ns
)
11189 int omp_workshare_save
;
11190 int forall_save
, do_concurrent_save
;
11194 frame
.prev
= cs_base
;
11198 find_reachable_labels (code
);
11200 for (; code
; code
= code
->next
)
11202 frame
.current
= code
;
11203 forall_save
= forall_flag
;
11204 do_concurrent_save
= gfc_do_concurrent_flag
;
11206 if (code
->op
== EXEC_FORALL
)
11209 gfc_resolve_forall (code
, ns
, forall_save
);
11212 else if (code
->block
)
11214 omp_workshare_save
= -1;
11217 case EXEC_OACC_PARALLEL_LOOP
:
11218 case EXEC_OACC_PARALLEL
:
11219 case EXEC_OACC_KERNELS_LOOP
:
11220 case EXEC_OACC_KERNELS
:
11221 case EXEC_OACC_DATA
:
11222 case EXEC_OACC_HOST_DATA
:
11223 case EXEC_OACC_LOOP
:
11224 gfc_resolve_oacc_blocks (code
, ns
);
11226 case EXEC_OMP_PARALLEL_WORKSHARE
:
11227 omp_workshare_save
= omp_workshare_flag
;
11228 omp_workshare_flag
= 1;
11229 gfc_resolve_omp_parallel_blocks (code
, ns
);
11231 case EXEC_OMP_PARALLEL
:
11232 case EXEC_OMP_PARALLEL_DO
:
11233 case EXEC_OMP_PARALLEL_DO_SIMD
:
11234 case EXEC_OMP_PARALLEL_SECTIONS
:
11235 case EXEC_OMP_TARGET_PARALLEL
:
11236 case EXEC_OMP_TARGET_PARALLEL_DO
:
11237 case EXEC_OMP_TARGET_PARALLEL_DO_SIMD
:
11238 case EXEC_OMP_TARGET_TEAMS
:
11239 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE
:
11240 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO
:
11241 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
11242 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_SIMD
:
11243 case EXEC_OMP_TASK
:
11244 case EXEC_OMP_TASKLOOP
:
11245 case EXEC_OMP_TASKLOOP_SIMD
:
11246 case EXEC_OMP_TEAMS
:
11247 case EXEC_OMP_TEAMS_DISTRIBUTE
:
11248 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO
:
11249 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
11250 case EXEC_OMP_TEAMS_DISTRIBUTE_SIMD
:
11251 omp_workshare_save
= omp_workshare_flag
;
11252 omp_workshare_flag
= 0;
11253 gfc_resolve_omp_parallel_blocks (code
, ns
);
11255 case EXEC_OMP_DISTRIBUTE
:
11256 case EXEC_OMP_DISTRIBUTE_SIMD
:
11258 case EXEC_OMP_DO_SIMD
:
11259 case EXEC_OMP_SIMD
:
11260 case EXEC_OMP_TARGET_SIMD
:
11261 gfc_resolve_omp_do_blocks (code
, ns
);
11263 case EXEC_SELECT_TYPE
:
11264 /* Blocks are handled in resolve_select_type because we have
11265 to transform the SELECT TYPE into ASSOCIATE first. */
11267 case EXEC_DO_CONCURRENT
:
11268 gfc_do_concurrent_flag
= 1;
11269 gfc_resolve_blocks (code
->block
, ns
);
11270 gfc_do_concurrent_flag
= 2;
11272 case EXEC_OMP_WORKSHARE
:
11273 omp_workshare_save
= omp_workshare_flag
;
11274 omp_workshare_flag
= 1;
11277 gfc_resolve_blocks (code
->block
, ns
);
11281 if (omp_workshare_save
!= -1)
11282 omp_workshare_flag
= omp_workshare_save
;
11286 if (code
->op
!= EXEC_COMPCALL
&& code
->op
!= EXEC_CALL_PPC
)
11287 t
= gfc_resolve_expr (code
->expr1
);
11288 forall_flag
= forall_save
;
11289 gfc_do_concurrent_flag
= do_concurrent_save
;
11291 if (!gfc_resolve_expr (code
->expr2
))
11294 if (code
->op
== EXEC_ALLOCATE
11295 && !gfc_resolve_expr (code
->expr3
))
11301 case EXEC_END_BLOCK
:
11302 case EXEC_END_NESTED_BLOCK
:
11306 case EXEC_ERROR_STOP
:
11308 case EXEC_CONTINUE
:
11310 case EXEC_ASSIGN_CALL
:
11313 case EXEC_CRITICAL
:
11314 resolve_critical (code
);
11317 case EXEC_SYNC_ALL
:
11318 case EXEC_SYNC_IMAGES
:
11319 case EXEC_SYNC_MEMORY
:
11320 resolve_sync (code
);
11325 case EXEC_EVENT_POST
:
11326 case EXEC_EVENT_WAIT
:
11327 resolve_lock_unlock_event (code
);
11330 case EXEC_FAIL_IMAGE
:
11331 case EXEC_FORM_TEAM
:
11332 case EXEC_CHANGE_TEAM
:
11333 case EXEC_END_TEAM
:
11334 case EXEC_SYNC_TEAM
:
11338 /* Keep track of which entry we are up to. */
11339 current_entry_id
= code
->ext
.entry
->id
;
11343 resolve_where (code
, NULL
);
11347 if (code
->expr1
!= NULL
)
11349 if (code
->expr1
->ts
.type
!= BT_INTEGER
)
11350 gfc_error ("ASSIGNED GOTO statement at %L requires an "
11351 "INTEGER variable", &code
->expr1
->where
);
11352 else if (code
->expr1
->symtree
->n
.sym
->attr
.assign
!= 1)
11353 gfc_error ("Variable %qs has not been assigned a target "
11354 "label at %L", code
->expr1
->symtree
->n
.sym
->name
,
11355 &code
->expr1
->where
);
11358 resolve_branch (code
->label1
, code
);
11362 if (code
->expr1
!= NULL
11363 && (code
->expr1
->ts
.type
!= BT_INTEGER
|| code
->expr1
->rank
))
11364 gfc_error ("Alternate RETURN statement at %L requires a SCALAR-"
11365 "INTEGER return specifier", &code
->expr1
->where
);
11368 case EXEC_INIT_ASSIGN
:
11369 case EXEC_END_PROCEDURE
:
11376 /* Remove a GFC_ISYM_CAF_GET inserted for a coindexed variable on
11378 if (code
->expr1
->expr_type
== EXPR_FUNCTION
11379 && code
->expr1
->value
.function
.isym
11380 && code
->expr1
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
)
11381 remove_caf_get_intrinsic (code
->expr1
);
11383 /* If this is a pointer function in an lvalue variable context,
11384 the new code will have to be resolved afresh. This is also the
11385 case with an error, where the code is transformed into NOP to
11386 prevent ICEs downstream. */
11387 if (resolve_ptr_fcn_assign (&code
, ns
)
11388 || code
->op
== EXEC_NOP
)
11391 if (!gfc_check_vardef_context (code
->expr1
, false, false, false,
11395 if (resolve_ordinary_assign (code
, ns
))
11397 if (code
->op
== EXEC_COMPCALL
)
11403 /* Check for dependencies in deferred character length array
11404 assignments and generate a temporary, if necessary. */
11405 if (code
->op
== EXEC_ASSIGN
&& deferred_op_assign (&code
, ns
))
11408 /* F03 7.4.1.3 for non-allocatable, non-pointer components. */
11409 if (code
->op
!= EXEC_CALL
&& code
->expr1
->ts
.type
== BT_DERIVED
11410 && code
->expr1
->ts
.u
.derived
11411 && code
->expr1
->ts
.u
.derived
->attr
.defined_assign_comp
)
11412 generate_component_assignments (&code
, ns
);
11416 case EXEC_LABEL_ASSIGN
:
11417 if (code
->label1
->defined
== ST_LABEL_UNKNOWN
)
11418 gfc_error ("Label %d referenced at %L is never defined",
11419 code
->label1
->value
, &code
->label1
->where
);
11421 && (code
->expr1
->expr_type
!= EXPR_VARIABLE
11422 || code
->expr1
->symtree
->n
.sym
->ts
.type
!= BT_INTEGER
11423 || code
->expr1
->symtree
->n
.sym
->ts
.kind
11424 != gfc_default_integer_kind
11425 || code
->expr1
->symtree
->n
.sym
->as
!= NULL
))
11426 gfc_error ("ASSIGN statement at %L requires a scalar "
11427 "default INTEGER variable", &code
->expr1
->where
);
11430 case EXEC_POINTER_ASSIGN
:
11437 /* This is both a variable definition and pointer assignment
11438 context, so check both of them. For rank remapping, a final
11439 array ref may be present on the LHS and fool gfc_expr_attr
11440 used in gfc_check_vardef_context. Remove it. */
11441 e
= remove_last_array_ref (code
->expr1
);
11442 t
= gfc_check_vardef_context (e
, true, false, false,
11443 _("pointer assignment"));
11445 t
= gfc_check_vardef_context (e
, false, false, false,
11446 _("pointer assignment"));
11449 t
= gfc_check_pointer_assign (code
->expr1
, code
->expr2
, !t
) && t
;
11454 /* Assigning a class object always is a regular assign. */
11455 if (code
->expr2
->ts
.type
== BT_CLASS
11456 && code
->expr1
->ts
.type
== BT_CLASS
11457 && !CLASS_DATA (code
->expr2
)->attr
.dimension
11458 && !(gfc_expr_attr (code
->expr1
).proc_pointer
11459 && code
->expr2
->expr_type
== EXPR_VARIABLE
11460 && code
->expr2
->symtree
->n
.sym
->attr
.flavor
11462 code
->op
= EXEC_ASSIGN
;
11466 case EXEC_ARITHMETIC_IF
:
11468 gfc_expr
*e
= code
->expr1
;
11470 gfc_resolve_expr (e
);
11471 if (e
->expr_type
== EXPR_NULL
)
11472 gfc_error ("Invalid NULL at %L", &e
->where
);
11474 if (t
&& (e
->rank
> 0
11475 || !(e
->ts
.type
== BT_REAL
|| e
->ts
.type
== BT_INTEGER
)))
11476 gfc_error ("Arithmetic IF statement at %L requires a scalar "
11477 "REAL or INTEGER expression", &e
->where
);
11479 resolve_branch (code
->label1
, code
);
11480 resolve_branch (code
->label2
, code
);
11481 resolve_branch (code
->label3
, code
);
11486 if (t
&& code
->expr1
!= NULL
11487 && (code
->expr1
->ts
.type
!= BT_LOGICAL
11488 || code
->expr1
->rank
!= 0))
11489 gfc_error ("IF clause at %L requires a scalar LOGICAL expression",
11490 &code
->expr1
->where
);
11495 resolve_call (code
);
11498 case EXEC_COMPCALL
:
11500 resolve_typebound_subroutine (code
);
11503 case EXEC_CALL_PPC
:
11504 resolve_ppc_call (code
);
11508 /* Select is complicated. Also, a SELECT construct could be
11509 a transformed computed GOTO. */
11510 resolve_select (code
, false);
11513 case EXEC_SELECT_TYPE
:
11514 resolve_select_type (code
, ns
);
11518 resolve_block_construct (code
);
11522 if (code
->ext
.iterator
!= NULL
)
11524 gfc_iterator
*iter
= code
->ext
.iterator
;
11525 if (gfc_resolve_iterator (iter
, true, false))
11526 gfc_resolve_do_iterator (code
, iter
->var
->symtree
->n
.sym
,
11531 case EXEC_DO_WHILE
:
11532 if (code
->expr1
== NULL
)
11533 gfc_internal_error ("gfc_resolve_code(): No expression on "
11536 && (code
->expr1
->rank
!= 0
11537 || code
->expr1
->ts
.type
!= BT_LOGICAL
))
11538 gfc_error ("Exit condition of DO WHILE loop at %L must be "
11539 "a scalar LOGICAL expression", &code
->expr1
->where
);
11542 case EXEC_ALLOCATE
:
11544 resolve_allocate_deallocate (code
, "ALLOCATE");
11548 case EXEC_DEALLOCATE
:
11550 resolve_allocate_deallocate (code
, "DEALLOCATE");
11555 if (!gfc_resolve_open (code
->ext
.open
))
11558 resolve_branch (code
->ext
.open
->err
, code
);
11562 if (!gfc_resolve_close (code
->ext
.close
))
11565 resolve_branch (code
->ext
.close
->err
, code
);
11568 case EXEC_BACKSPACE
:
11572 if (!gfc_resolve_filepos (code
->ext
.filepos
, &code
->loc
))
11575 resolve_branch (code
->ext
.filepos
->err
, code
);
11579 if (!gfc_resolve_inquire (code
->ext
.inquire
))
11582 resolve_branch (code
->ext
.inquire
->err
, code
);
11585 case EXEC_IOLENGTH
:
11586 gcc_assert (code
->ext
.inquire
!= NULL
);
11587 if (!gfc_resolve_inquire (code
->ext
.inquire
))
11590 resolve_branch (code
->ext
.inquire
->err
, code
);
11594 if (!gfc_resolve_wait (code
->ext
.wait
))
11597 resolve_branch (code
->ext
.wait
->err
, code
);
11598 resolve_branch (code
->ext
.wait
->end
, code
);
11599 resolve_branch (code
->ext
.wait
->eor
, code
);
11604 if (!gfc_resolve_dt (code
->ext
.dt
, &code
->loc
))
11607 resolve_branch (code
->ext
.dt
->err
, code
);
11608 resolve_branch (code
->ext
.dt
->end
, code
);
11609 resolve_branch (code
->ext
.dt
->eor
, code
);
11612 case EXEC_TRANSFER
:
11613 resolve_transfer (code
);
11616 case EXEC_DO_CONCURRENT
:
11618 resolve_forall_iterators (code
->ext
.forall_iterator
);
11620 if (code
->expr1
!= NULL
11621 && (code
->expr1
->ts
.type
!= BT_LOGICAL
|| code
->expr1
->rank
))
11622 gfc_error ("FORALL mask clause at %L requires a scalar LOGICAL "
11623 "expression", &code
->expr1
->where
);
11626 case EXEC_OACC_PARALLEL_LOOP
:
11627 case EXEC_OACC_PARALLEL
:
11628 case EXEC_OACC_KERNELS_LOOP
:
11629 case EXEC_OACC_KERNELS
:
11630 case EXEC_OACC_DATA
:
11631 case EXEC_OACC_HOST_DATA
:
11632 case EXEC_OACC_LOOP
:
11633 case EXEC_OACC_UPDATE
:
11634 case EXEC_OACC_WAIT
:
11635 case EXEC_OACC_CACHE
:
11636 case EXEC_OACC_ENTER_DATA
:
11637 case EXEC_OACC_EXIT_DATA
:
11638 case EXEC_OACC_ATOMIC
:
11639 case EXEC_OACC_DECLARE
:
11640 gfc_resolve_oacc_directive (code
, ns
);
11643 case EXEC_OMP_ATOMIC
:
11644 case EXEC_OMP_BARRIER
:
11645 case EXEC_OMP_CANCEL
:
11646 case EXEC_OMP_CANCELLATION_POINT
:
11647 case EXEC_OMP_CRITICAL
:
11648 case EXEC_OMP_FLUSH
:
11649 case EXEC_OMP_DISTRIBUTE
:
11650 case EXEC_OMP_DISTRIBUTE_PARALLEL_DO
:
11651 case EXEC_OMP_DISTRIBUTE_PARALLEL_DO_SIMD
:
11652 case EXEC_OMP_DISTRIBUTE_SIMD
:
11654 case EXEC_OMP_DO_SIMD
:
11655 case EXEC_OMP_MASTER
:
11656 case EXEC_OMP_ORDERED
:
11657 case EXEC_OMP_SECTIONS
:
11658 case EXEC_OMP_SIMD
:
11659 case EXEC_OMP_SINGLE
:
11660 case EXEC_OMP_TARGET
:
11661 case EXEC_OMP_TARGET_DATA
:
11662 case EXEC_OMP_TARGET_ENTER_DATA
:
11663 case EXEC_OMP_TARGET_EXIT_DATA
:
11664 case EXEC_OMP_TARGET_PARALLEL
:
11665 case EXEC_OMP_TARGET_PARALLEL_DO
:
11666 case EXEC_OMP_TARGET_PARALLEL_DO_SIMD
:
11667 case EXEC_OMP_TARGET_SIMD
:
11668 case EXEC_OMP_TARGET_TEAMS
:
11669 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE
:
11670 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO
:
11671 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
11672 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_SIMD
:
11673 case EXEC_OMP_TARGET_UPDATE
:
11674 case EXEC_OMP_TASK
:
11675 case EXEC_OMP_TASKGROUP
:
11676 case EXEC_OMP_TASKLOOP
:
11677 case EXEC_OMP_TASKLOOP_SIMD
:
11678 case EXEC_OMP_TASKWAIT
:
11679 case EXEC_OMP_TASKYIELD
:
11680 case EXEC_OMP_TEAMS
:
11681 case EXEC_OMP_TEAMS_DISTRIBUTE
:
11682 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO
:
11683 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
11684 case EXEC_OMP_TEAMS_DISTRIBUTE_SIMD
:
11685 case EXEC_OMP_WORKSHARE
:
11686 gfc_resolve_omp_directive (code
, ns
);
11689 case EXEC_OMP_PARALLEL
:
11690 case EXEC_OMP_PARALLEL_DO
:
11691 case EXEC_OMP_PARALLEL_DO_SIMD
:
11692 case EXEC_OMP_PARALLEL_SECTIONS
:
11693 case EXEC_OMP_PARALLEL_WORKSHARE
:
11694 omp_workshare_save
= omp_workshare_flag
;
11695 omp_workshare_flag
= 0;
11696 gfc_resolve_omp_directive (code
, ns
);
11697 omp_workshare_flag
= omp_workshare_save
;
11701 gfc_internal_error ("gfc_resolve_code(): Bad statement code");
11705 cs_base
= frame
.prev
;
11709 /* Resolve initial values and make sure they are compatible with
11713 resolve_values (gfc_symbol
*sym
)
11717 if (sym
->value
== NULL
)
11720 if (sym
->value
->expr_type
== EXPR_STRUCTURE
)
11721 t
= resolve_structure_cons (sym
->value
, 1);
11723 t
= gfc_resolve_expr (sym
->value
);
11728 gfc_check_assign_symbol (sym
, NULL
, sym
->value
);
11732 /* Verify any BIND(C) derived types in the namespace so we can report errors
11733 for them once, rather than for each variable declared of that type. */
11736 resolve_bind_c_derived_types (gfc_symbol
*derived_sym
)
11738 if (derived_sym
!= NULL
&& derived_sym
->attr
.flavor
== FL_DERIVED
11739 && derived_sym
->attr
.is_bind_c
== 1)
11740 verify_bind_c_derived_type (derived_sym
);
11746 /* Check the interfaces of DTIO procedures associated with derived
11747 type 'sym'. These procedures can either have typebound bindings or
11748 can appear in DTIO generic interfaces. */
11751 gfc_verify_DTIO_procedures (gfc_symbol
*sym
)
11753 if (!sym
|| sym
->attr
.flavor
!= FL_DERIVED
)
11756 gfc_check_dtio_interfaces (sym
);
11761 /* Verify that any binding labels used in a given namespace do not collide
11762 with the names or binding labels of any global symbols. Multiple INTERFACE
11763 for the same procedure are permitted. */
11766 gfc_verify_binding_labels (gfc_symbol
*sym
)
11769 const char *module
;
11771 if (!sym
|| !sym
->attr
.is_bind_c
|| sym
->attr
.is_iso_c
11772 || sym
->attr
.flavor
== FL_DERIVED
|| !sym
->binding_label
)
11775 gsym
= gfc_find_case_gsymbol (gfc_gsym_root
, sym
->binding_label
);
11778 module
= sym
->module
;
11779 else if (sym
->ns
&& sym
->ns
->proc_name
11780 && sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
)
11781 module
= sym
->ns
->proc_name
->name
;
11782 else if (sym
->ns
&& sym
->ns
->parent
11783 && sym
->ns
&& sym
->ns
->parent
->proc_name
11784 && sym
->ns
->parent
->proc_name
->attr
.flavor
== FL_MODULE
)
11785 module
= sym
->ns
->parent
->proc_name
->name
;
11791 && (gsym
->type
== GSYM_FUNCTION
|| gsym
->type
== GSYM_SUBROUTINE
)))
11794 gsym
= gfc_get_gsymbol (sym
->binding_label
);
11795 gsym
->where
= sym
->declared_at
;
11796 gsym
->sym_name
= sym
->name
;
11797 gsym
->binding_label
= sym
->binding_label
;
11798 gsym
->ns
= sym
->ns
;
11799 gsym
->mod_name
= module
;
11800 if (sym
->attr
.function
)
11801 gsym
->type
= GSYM_FUNCTION
;
11802 else if (sym
->attr
.subroutine
)
11803 gsym
->type
= GSYM_SUBROUTINE
;
11804 /* Mark as variable/procedure as defined, unless its an INTERFACE. */
11805 gsym
->defined
= sym
->attr
.if_source
!= IFSRC_IFBODY
;
11809 if (sym
->attr
.flavor
== FL_VARIABLE
&& gsym
->type
!= GSYM_UNKNOWN
)
11811 gfc_error ("Variable %qs with binding label %qs at %L uses the same global "
11812 "identifier as entity at %L", sym
->name
,
11813 sym
->binding_label
, &sym
->declared_at
, &gsym
->where
);
11814 /* Clear the binding label to prevent checking multiple times. */
11815 sym
->binding_label
= NULL
;
11819 if (sym
->attr
.flavor
== FL_VARIABLE
&& module
11820 && (strcmp (module
, gsym
->mod_name
) != 0
11821 || strcmp (sym
->name
, gsym
->sym_name
) != 0))
11823 /* This can only happen if the variable is defined in a module - if it
11824 isn't the same module, reject it. */
11825 gfc_error ("Variable %qs from module %qs with binding label %qs at %L "
11826 "uses the same global identifier as entity at %L from module %qs",
11827 sym
->name
, module
, sym
->binding_label
,
11828 &sym
->declared_at
, &gsym
->where
, gsym
->mod_name
);
11829 sym
->binding_label
= NULL
;
11833 if ((sym
->attr
.function
|| sym
->attr
.subroutine
)
11834 && ((gsym
->type
!= GSYM_SUBROUTINE
&& gsym
->type
!= GSYM_FUNCTION
)
11835 || (gsym
->defined
&& sym
->attr
.if_source
!= IFSRC_IFBODY
))
11836 && (sym
!= gsym
->ns
->proc_name
&& sym
->attr
.entry
== 0)
11837 && (module
!= gsym
->mod_name
11838 || strcmp (gsym
->sym_name
, sym
->name
) != 0
11839 || (module
&& strcmp (module
, gsym
->mod_name
) != 0)))
11841 /* Print an error if the procedure is defined multiple times; we have to
11842 exclude references to the same procedure via module association or
11843 multiple checks for the same procedure. */
11844 gfc_error ("Procedure %qs with binding label %qs at %L uses the same "
11845 "global identifier as entity at %L", sym
->name
,
11846 sym
->binding_label
, &sym
->declared_at
, &gsym
->where
);
11847 sym
->binding_label
= NULL
;
11852 /* Resolve an index expression. */
11855 resolve_index_expr (gfc_expr
*e
)
11857 if (!gfc_resolve_expr (e
))
11860 if (!gfc_simplify_expr (e
, 0))
11863 if (!gfc_specification_expr (e
))
11870 /* Resolve a charlen structure. */
11873 resolve_charlen (gfc_charlen
*cl
)
11876 bool saved_specification_expr
;
11882 saved_specification_expr
= specification_expr
;
11883 specification_expr
= true;
11885 if (cl
->length_from_typespec
)
11887 if (!gfc_resolve_expr (cl
->length
))
11889 specification_expr
= saved_specification_expr
;
11893 if (!gfc_simplify_expr (cl
->length
, 0))
11895 specification_expr
= saved_specification_expr
;
11899 /* cl->length has been resolved. It should have an integer type. */
11900 if (cl
->length
->ts
.type
!= BT_INTEGER
)
11902 gfc_error ("Scalar INTEGER expression expected at %L",
11903 &cl
->length
->where
);
11909 if (!resolve_index_expr (cl
->length
))
11911 specification_expr
= saved_specification_expr
;
11916 /* F2008, 4.4.3.2: If the character length parameter value evaluates to
11917 a negative value, the length of character entities declared is zero. */
11918 if (cl
->length
&& cl
->length
->expr_type
== EXPR_CONSTANT
11919 && mpz_sgn (cl
->length
->value
.integer
) < 0)
11920 gfc_replace_expr (cl
->length
,
11921 gfc_get_int_expr (gfc_charlen_int_kind
, NULL
, 0));
11923 /* Check that the character length is not too large. */
11924 k
= gfc_validate_kind (BT_INTEGER
, gfc_charlen_int_kind
, false);
11925 if (cl
->length
&& cl
->length
->expr_type
== EXPR_CONSTANT
11926 && cl
->length
->ts
.type
== BT_INTEGER
11927 && mpz_cmp (cl
->length
->value
.integer
, gfc_integer_kinds
[k
].huge
) > 0)
11929 gfc_error ("String length at %L is too large", &cl
->length
->where
);
11930 specification_expr
= saved_specification_expr
;
11934 specification_expr
= saved_specification_expr
;
11939 /* Test for non-constant shape arrays. */
11942 is_non_constant_shape_array (gfc_symbol
*sym
)
11948 not_constant
= false;
11949 if (sym
->as
!= NULL
)
11951 /* Unfortunately, !gfc_is_compile_time_shape hits a legal case that
11952 has not been simplified; parameter array references. Do the
11953 simplification now. */
11954 for (i
= 0; i
< sym
->as
->rank
+ sym
->as
->corank
; i
++)
11956 e
= sym
->as
->lower
[i
];
11957 if (e
&& (!resolve_index_expr(e
)
11958 || !gfc_is_constant_expr (e
)))
11959 not_constant
= true;
11960 e
= sym
->as
->upper
[i
];
11961 if (e
&& (!resolve_index_expr(e
)
11962 || !gfc_is_constant_expr (e
)))
11963 not_constant
= true;
11966 return not_constant
;
11969 /* Given a symbol and an initialization expression, add code to initialize
11970 the symbol to the function entry. */
11972 build_init_assign (gfc_symbol
*sym
, gfc_expr
*init
)
11976 gfc_namespace
*ns
= sym
->ns
;
11978 /* Search for the function namespace if this is a contained
11979 function without an explicit result. */
11980 if (sym
->attr
.function
&& sym
== sym
->result
11981 && sym
->name
!= sym
->ns
->proc_name
->name
)
11983 ns
= ns
->contained
;
11984 for (;ns
; ns
= ns
->sibling
)
11985 if (strcmp (ns
->proc_name
->name
, sym
->name
) == 0)
11991 gfc_free_expr (init
);
11995 /* Build an l-value expression for the result. */
11996 lval
= gfc_lval_expr_from_sym (sym
);
11998 /* Add the code at scope entry. */
11999 init_st
= gfc_get_code (EXEC_INIT_ASSIGN
);
12000 init_st
->next
= ns
->code
;
12001 ns
->code
= init_st
;
12003 /* Assign the default initializer to the l-value. */
12004 init_st
->loc
= sym
->declared_at
;
12005 init_st
->expr1
= lval
;
12006 init_st
->expr2
= init
;
12010 /* Whether or not we can generate a default initializer for a symbol. */
12013 can_generate_init (gfc_symbol
*sym
)
12015 symbol_attribute
*a
;
12020 /* These symbols should never have a default initialization. */
12025 || (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
)
12026 && (CLASS_DATA (sym
)->attr
.class_pointer
12027 || CLASS_DATA (sym
)->attr
.proc_pointer
))
12028 || a
->in_equivalence
12035 || (!a
->referenced
&& !a
->result
)
12036 || (a
->dummy
&& a
->intent
!= INTENT_OUT
)
12037 || (a
->function
&& sym
!= sym
->result
)
12042 /* Assign the default initializer to a derived type variable or result. */
12045 apply_default_init (gfc_symbol
*sym
)
12047 gfc_expr
*init
= NULL
;
12049 if (sym
->attr
.flavor
!= FL_VARIABLE
&& !sym
->attr
.function
)
12052 if (sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
)
12053 init
= gfc_generate_initializer (&sym
->ts
, can_generate_init (sym
));
12055 if (init
== NULL
&& sym
->ts
.type
!= BT_CLASS
)
12058 build_init_assign (sym
, init
);
12059 sym
->attr
.referenced
= 1;
12063 /* Build an initializer for a local. Returns null if the symbol should not have
12064 a default initialization. */
12067 build_default_init_expr (gfc_symbol
*sym
)
12069 /* These symbols should never have a default initialization. */
12070 if (sym
->attr
.allocatable
12071 || sym
->attr
.external
12073 || sym
->attr
.pointer
12074 || sym
->attr
.in_equivalence
12075 || sym
->attr
.in_common
12078 || sym
->attr
.cray_pointee
12079 || sym
->attr
.cray_pointer
12083 /* Get the appropriate init expression. */
12084 return gfc_build_default_init_expr (&sym
->ts
, &sym
->declared_at
);
12087 /* Add an initialization expression to a local variable. */
12089 apply_default_init_local (gfc_symbol
*sym
)
12091 gfc_expr
*init
= NULL
;
12093 /* The symbol should be a variable or a function return value. */
12094 if ((sym
->attr
.flavor
!= FL_VARIABLE
&& !sym
->attr
.function
)
12095 || (sym
->attr
.function
&& sym
->result
!= sym
))
12098 /* Try to build the initializer expression. If we can't initialize
12099 this symbol, then init will be NULL. */
12100 init
= build_default_init_expr (sym
);
12104 /* For saved variables, we don't want to add an initializer at function
12105 entry, so we just add a static initializer. Note that automatic variables
12106 are stack allocated even with -fno-automatic; we have also to exclude
12107 result variable, which are also nonstatic. */
12108 if (!sym
->attr
.automatic
12109 && (sym
->attr
.save
|| sym
->ns
->save_all
12110 || (flag_max_stack_var_size
== 0 && !sym
->attr
.result
12111 && (sym
->ns
->proc_name
&& !sym
->ns
->proc_name
->attr
.recursive
)
12112 && (!sym
->attr
.dimension
|| !is_non_constant_shape_array (sym
)))))
12114 /* Don't clobber an existing initializer! */
12115 gcc_assert (sym
->value
== NULL
);
12120 build_init_assign (sym
, init
);
12124 /* Resolution of common features of flavors variable and procedure. */
12127 resolve_fl_var_and_proc (gfc_symbol
*sym
, int mp_flag
)
12129 gfc_array_spec
*as
;
12131 if (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
)
12132 as
= CLASS_DATA (sym
)->as
;
12136 /* Constraints on deferred shape variable. */
12137 if (as
== NULL
|| as
->type
!= AS_DEFERRED
)
12139 bool pointer
, allocatable
, dimension
;
12141 if (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
)
12143 pointer
= CLASS_DATA (sym
)->attr
.class_pointer
;
12144 allocatable
= CLASS_DATA (sym
)->attr
.allocatable
;
12145 dimension
= CLASS_DATA (sym
)->attr
.dimension
;
12149 pointer
= sym
->attr
.pointer
&& !sym
->attr
.select_type_temporary
;
12150 allocatable
= sym
->attr
.allocatable
;
12151 dimension
= sym
->attr
.dimension
;
12156 if (dimension
&& as
->type
!= AS_ASSUMED_RANK
)
12158 gfc_error ("Allocatable array %qs at %L must have a deferred "
12159 "shape or assumed rank", sym
->name
, &sym
->declared_at
);
12162 else if (!gfc_notify_std (GFC_STD_F2003
, "Scalar object "
12163 "%qs at %L may not be ALLOCATABLE",
12164 sym
->name
, &sym
->declared_at
))
12168 if (pointer
&& dimension
&& as
->type
!= AS_ASSUMED_RANK
)
12170 gfc_error ("Array pointer %qs at %L must have a deferred shape or "
12171 "assumed rank", sym
->name
, &sym
->declared_at
);
12177 if (!mp_flag
&& !sym
->attr
.allocatable
&& !sym
->attr
.pointer
12178 && sym
->ts
.type
!= BT_CLASS
&& !sym
->assoc
)
12180 gfc_error ("Array %qs at %L cannot have a deferred shape",
12181 sym
->name
, &sym
->declared_at
);
12186 /* Constraints on polymorphic variables. */
12187 if (sym
->ts
.type
== BT_CLASS
&& !(sym
->result
&& sym
->result
!= sym
))
12190 if (sym
->attr
.class_ok
12191 && !sym
->attr
.select_type_temporary
12192 && !UNLIMITED_POLY (sym
)
12193 && !gfc_type_is_extensible (CLASS_DATA (sym
)->ts
.u
.derived
))
12195 gfc_error ("Type %qs of CLASS variable %qs at %L is not extensible",
12196 CLASS_DATA (sym
)->ts
.u
.derived
->name
, sym
->name
,
12197 &sym
->declared_at
);
12202 /* Assume that use associated symbols were checked in the module ns.
12203 Class-variables that are associate-names are also something special
12204 and excepted from the test. */
12205 if (!sym
->attr
.class_ok
&& !sym
->attr
.use_assoc
&& !sym
->assoc
)
12207 gfc_error ("CLASS variable %qs at %L must be dummy, allocatable "
12208 "or pointer", sym
->name
, &sym
->declared_at
);
12217 /* Additional checks for symbols with flavor variable and derived
12218 type. To be called from resolve_fl_variable. */
12221 resolve_fl_variable_derived (gfc_symbol
*sym
, int no_init_flag
)
12223 gcc_assert (sym
->ts
.type
== BT_DERIVED
|| sym
->ts
.type
== BT_CLASS
);
12225 /* Check to see if a derived type is blocked from being host
12226 associated by the presence of another class I symbol in the same
12227 namespace. 14.6.1.3 of the standard and the discussion on
12228 comp.lang.fortran. */
12229 if (sym
->ns
!= sym
->ts
.u
.derived
->ns
12230 && !sym
->ts
.u
.derived
->attr
.use_assoc
12231 && sym
->ns
->proc_name
->attr
.if_source
!= IFSRC_IFBODY
)
12234 gfc_find_symbol (sym
->ts
.u
.derived
->name
, sym
->ns
, 0, &s
);
12235 if (s
&& s
->attr
.generic
)
12236 s
= gfc_find_dt_in_generic (s
);
12237 if (s
&& !gfc_fl_struct (s
->attr
.flavor
))
12239 gfc_error ("The type %qs cannot be host associated at %L "
12240 "because it is blocked by an incompatible object "
12241 "of the same name declared at %L",
12242 sym
->ts
.u
.derived
->name
, &sym
->declared_at
,
12248 /* 4th constraint in section 11.3: "If an object of a type for which
12249 component-initialization is specified (R429) appears in the
12250 specification-part of a module and does not have the ALLOCATABLE
12251 or POINTER attribute, the object shall have the SAVE attribute."
12253 The check for initializers is performed with
12254 gfc_has_default_initializer because gfc_default_initializer generates
12255 a hidden default for allocatable components. */
12256 if (!(sym
->value
|| no_init_flag
) && sym
->ns
->proc_name
12257 && sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
12258 && !(sym
->ns
->save_all
&& !sym
->attr
.automatic
) && !sym
->attr
.save
12259 && !sym
->attr
.pointer
&& !sym
->attr
.allocatable
12260 && gfc_has_default_initializer (sym
->ts
.u
.derived
)
12261 && !gfc_notify_std (GFC_STD_F2008
, "Implied SAVE for module variable "
12262 "%qs at %L, needed due to the default "
12263 "initialization", sym
->name
, &sym
->declared_at
))
12266 /* Assign default initializer. */
12267 if (!(sym
->value
|| sym
->attr
.pointer
|| sym
->attr
.allocatable
)
12268 && (!no_init_flag
|| sym
->attr
.intent
== INTENT_OUT
))
12269 sym
->value
= gfc_generate_initializer (&sym
->ts
, can_generate_init (sym
));
12275 /* F2008, C402 (R401): A colon shall not be used as a type-param-value
12276 except in the declaration of an entity or component that has the POINTER
12277 or ALLOCATABLE attribute. */
12280 deferred_requirements (gfc_symbol
*sym
)
12282 if (sym
->ts
.deferred
12283 && !(sym
->attr
.pointer
12284 || sym
->attr
.allocatable
12285 || sym
->attr
.associate_var
12286 || sym
->attr
.omp_udr_artificial_var
))
12288 gfc_error ("Entity %qs at %L has a deferred type parameter and "
12289 "requires either the POINTER or ALLOCATABLE attribute",
12290 sym
->name
, &sym
->declared_at
);
12297 /* Resolve symbols with flavor variable. */
12300 resolve_fl_variable (gfc_symbol
*sym
, int mp_flag
)
12302 const char *auto_save_msg
= "Automatic object %qs at %L cannot have the "
12305 if (!resolve_fl_var_and_proc (sym
, mp_flag
))
12308 /* Set this flag to check that variables are parameters of all entries.
12309 This check is effected by the call to gfc_resolve_expr through
12310 is_non_constant_shape_array. */
12311 bool saved_specification_expr
= specification_expr
;
12312 specification_expr
= true;
12314 if (sym
->ns
->proc_name
12315 && (sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
12316 || sym
->ns
->proc_name
->attr
.is_main_program
)
12317 && !sym
->attr
.use_assoc
12318 && !sym
->attr
.allocatable
12319 && !sym
->attr
.pointer
12320 && is_non_constant_shape_array (sym
))
12322 /* F08:C541. The shape of an array defined in a main program or module
12323 * needs to be constant. */
12324 gfc_error ("The module or main program array %qs at %L must "
12325 "have constant shape", sym
->name
, &sym
->declared_at
);
12326 specification_expr
= saved_specification_expr
;
12330 /* Constraints on deferred type parameter. */
12331 if (!deferred_requirements (sym
))
12334 if (sym
->ts
.type
== BT_CHARACTER
&& !sym
->attr
.associate_var
)
12336 /* Make sure that character string variables with assumed length are
12337 dummy arguments. */
12338 gfc_expr
*e
= NULL
;
12341 e
= sym
->ts
.u
.cl
->length
;
12345 if (e
== NULL
&& !sym
->attr
.dummy
&& !sym
->attr
.result
12346 && !sym
->ts
.deferred
&& !sym
->attr
.select_type_temporary
12347 && !sym
->attr
.omp_udr_artificial_var
)
12349 gfc_error ("Entity with assumed character length at %L must be a "
12350 "dummy argument or a PARAMETER", &sym
->declared_at
);
12351 specification_expr
= saved_specification_expr
;
12355 if (e
&& sym
->attr
.save
== SAVE_EXPLICIT
&& !gfc_is_constant_expr (e
))
12357 gfc_error (auto_save_msg
, sym
->name
, &sym
->declared_at
);
12358 specification_expr
= saved_specification_expr
;
12362 if (!gfc_is_constant_expr (e
)
12363 && !(e
->expr_type
== EXPR_VARIABLE
12364 && e
->symtree
->n
.sym
->attr
.flavor
== FL_PARAMETER
))
12366 if (!sym
->attr
.use_assoc
&& sym
->ns
->proc_name
12367 && (sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
12368 || sym
->ns
->proc_name
->attr
.is_main_program
))
12370 gfc_error ("%qs at %L must have constant character length "
12371 "in this context", sym
->name
, &sym
->declared_at
);
12372 specification_expr
= saved_specification_expr
;
12375 if (sym
->attr
.in_common
)
12377 gfc_error ("COMMON variable %qs at %L must have constant "
12378 "character length", sym
->name
, &sym
->declared_at
);
12379 specification_expr
= saved_specification_expr
;
12385 if (sym
->value
== NULL
&& sym
->attr
.referenced
)
12386 apply_default_init_local (sym
); /* Try to apply a default initialization. */
12388 /* Determine if the symbol may not have an initializer. */
12389 int no_init_flag
= 0, automatic_flag
= 0;
12390 if (sym
->attr
.allocatable
|| sym
->attr
.external
|| sym
->attr
.dummy
12391 || sym
->attr
.intrinsic
|| sym
->attr
.result
)
12393 else if ((sym
->attr
.dimension
|| sym
->attr
.codimension
) && !sym
->attr
.pointer
12394 && is_non_constant_shape_array (sym
))
12396 no_init_flag
= automatic_flag
= 1;
12398 /* Also, they must not have the SAVE attribute.
12399 SAVE_IMPLICIT is checked below. */
12400 if (sym
->as
&& sym
->attr
.codimension
)
12402 int corank
= sym
->as
->corank
;
12403 sym
->as
->corank
= 0;
12404 no_init_flag
= automatic_flag
= is_non_constant_shape_array (sym
);
12405 sym
->as
->corank
= corank
;
12407 if (automatic_flag
&& sym
->attr
.save
== SAVE_EXPLICIT
)
12409 gfc_error (auto_save_msg
, sym
->name
, &sym
->declared_at
);
12410 specification_expr
= saved_specification_expr
;
12415 /* Ensure that any initializer is simplified. */
12417 gfc_simplify_expr (sym
->value
, 1);
12419 /* Reject illegal initializers. */
12420 if (!sym
->mark
&& sym
->value
)
12422 if (sym
->attr
.allocatable
|| (sym
->ts
.type
== BT_CLASS
12423 && CLASS_DATA (sym
)->attr
.allocatable
))
12424 gfc_error ("Allocatable %qs at %L cannot have an initializer",
12425 sym
->name
, &sym
->declared_at
);
12426 else if (sym
->attr
.external
)
12427 gfc_error ("External %qs at %L cannot have an initializer",
12428 sym
->name
, &sym
->declared_at
);
12429 else if (sym
->attr
.dummy
12430 && !(sym
->ts
.type
== BT_DERIVED
&& sym
->attr
.intent
== INTENT_OUT
))
12431 gfc_error ("Dummy %qs at %L cannot have an initializer",
12432 sym
->name
, &sym
->declared_at
);
12433 else if (sym
->attr
.intrinsic
)
12434 gfc_error ("Intrinsic %qs at %L cannot have an initializer",
12435 sym
->name
, &sym
->declared_at
);
12436 else if (sym
->attr
.result
)
12437 gfc_error ("Function result %qs at %L cannot have an initializer",
12438 sym
->name
, &sym
->declared_at
);
12439 else if (automatic_flag
)
12440 gfc_error ("Automatic array %qs at %L cannot have an initializer",
12441 sym
->name
, &sym
->declared_at
);
12443 goto no_init_error
;
12444 specification_expr
= saved_specification_expr
;
12449 if (sym
->ts
.type
== BT_DERIVED
|| sym
->ts
.type
== BT_CLASS
)
12451 bool res
= resolve_fl_variable_derived (sym
, no_init_flag
);
12452 specification_expr
= saved_specification_expr
;
12456 specification_expr
= saved_specification_expr
;
12461 /* Compare the dummy characteristics of a module procedure interface
12462 declaration with the corresponding declaration in a submodule. */
12463 static gfc_formal_arglist
*new_formal
;
12464 static char errmsg
[200];
12467 compare_fsyms (gfc_symbol
*sym
)
12471 if (sym
== NULL
|| new_formal
== NULL
)
12474 fsym
= new_formal
->sym
;
12479 if (strcmp (sym
->name
, fsym
->name
) == 0)
12481 if (!gfc_check_dummy_characteristics (fsym
, sym
, true, errmsg
, 200))
12482 gfc_error ("%s at %L", errmsg
, &fsym
->declared_at
);
12487 /* Resolve a procedure. */
12490 resolve_fl_procedure (gfc_symbol
*sym
, int mp_flag
)
12492 gfc_formal_arglist
*arg
;
12494 if (sym
->attr
.function
12495 && !resolve_fl_var_and_proc (sym
, mp_flag
))
12498 if (sym
->ts
.type
== BT_CHARACTER
)
12500 gfc_charlen
*cl
= sym
->ts
.u
.cl
;
12502 if (cl
&& cl
->length
&& gfc_is_constant_expr (cl
->length
)
12503 && !resolve_charlen (cl
))
12506 if ((!cl
|| !cl
->length
|| cl
->length
->expr_type
!= EXPR_CONSTANT
)
12507 && sym
->attr
.proc
== PROC_ST_FUNCTION
)
12509 gfc_error ("Character-valued statement function %qs at %L must "
12510 "have constant length", sym
->name
, &sym
->declared_at
);
12515 /* Ensure that derived type for are not of a private type. Internal
12516 module procedures are excluded by 2.2.3.3 - i.e., they are not
12517 externally accessible and can access all the objects accessible in
12519 if (!(sym
->ns
->parent
&& sym
->ns
->parent
->proc_name
12520 && sym
->ns
->parent
->proc_name
->attr
.flavor
== FL_MODULE
)
12521 && gfc_check_symbol_access (sym
))
12523 gfc_interface
*iface
;
12525 for (arg
= gfc_sym_get_dummy_args (sym
); arg
; arg
= arg
->next
)
12528 && arg
->sym
->ts
.type
== BT_DERIVED
12529 && !arg
->sym
->ts
.u
.derived
->attr
.use_assoc
12530 && !gfc_check_symbol_access (arg
->sym
->ts
.u
.derived
)
12531 && !gfc_notify_std (GFC_STD_F2003
, "%qs is of a PRIVATE type "
12532 "and cannot be a dummy argument"
12533 " of %qs, which is PUBLIC at %L",
12534 arg
->sym
->name
, sym
->name
,
12535 &sym
->declared_at
))
12537 /* Stop this message from recurring. */
12538 arg
->sym
->ts
.u
.derived
->attr
.access
= ACCESS_PUBLIC
;
12543 /* PUBLIC interfaces may expose PRIVATE procedures that take types
12544 PRIVATE to the containing module. */
12545 for (iface
= sym
->generic
; iface
; iface
= iface
->next
)
12547 for (arg
= gfc_sym_get_dummy_args (iface
->sym
); arg
; arg
= arg
->next
)
12550 && arg
->sym
->ts
.type
== BT_DERIVED
12551 && !arg
->sym
->ts
.u
.derived
->attr
.use_assoc
12552 && !gfc_check_symbol_access (arg
->sym
->ts
.u
.derived
)
12553 && !gfc_notify_std (GFC_STD_F2003
, "Procedure %qs in "
12554 "PUBLIC interface %qs at %L "
12555 "takes dummy arguments of %qs which "
12556 "is PRIVATE", iface
->sym
->name
,
12557 sym
->name
, &iface
->sym
->declared_at
,
12558 gfc_typename(&arg
->sym
->ts
)))
12560 /* Stop this message from recurring. */
12561 arg
->sym
->ts
.u
.derived
->attr
.access
= ACCESS_PUBLIC
;
12568 if (sym
->attr
.function
&& sym
->value
&& sym
->attr
.proc
!= PROC_ST_FUNCTION
12569 && !sym
->attr
.proc_pointer
)
12571 gfc_error ("Function %qs at %L cannot have an initializer",
12572 sym
->name
, &sym
->declared_at
);
12574 /* Make sure no second error is issued for this. */
12575 sym
->value
->error
= 1;
12579 /* An external symbol may not have an initializer because it is taken to be
12580 a procedure. Exception: Procedure Pointers. */
12581 if (sym
->attr
.external
&& sym
->value
&& !sym
->attr
.proc_pointer
)
12583 gfc_error ("External object %qs at %L may not have an initializer",
12584 sym
->name
, &sym
->declared_at
);
12588 /* An elemental function is required to return a scalar 12.7.1 */
12589 if (sym
->attr
.elemental
&& sym
->attr
.function
12590 && (sym
->as
|| (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
)->as
)))
12592 gfc_error ("ELEMENTAL function %qs at %L must have a scalar "
12593 "result", sym
->name
, &sym
->declared_at
);
12594 /* Reset so that the error only occurs once. */
12595 sym
->attr
.elemental
= 0;
12599 if (sym
->attr
.proc
== PROC_ST_FUNCTION
12600 && (sym
->attr
.allocatable
|| sym
->attr
.pointer
))
12602 gfc_error ("Statement function %qs at %L may not have pointer or "
12603 "allocatable attribute", sym
->name
, &sym
->declared_at
);
12607 /* 5.1.1.5 of the Standard: A function name declared with an asterisk
12608 char-len-param shall not be array-valued, pointer-valued, recursive
12609 or pure. ....snip... A character value of * may only be used in the
12610 following ways: (i) Dummy arg of procedure - dummy associates with
12611 actual length; (ii) To declare a named constant; or (iii) External
12612 function - but length must be declared in calling scoping unit. */
12613 if (sym
->attr
.function
12614 && sym
->ts
.type
== BT_CHARACTER
&& !sym
->ts
.deferred
12615 && sym
->ts
.u
.cl
&& sym
->ts
.u
.cl
->length
== NULL
)
12617 if ((sym
->as
&& sym
->as
->rank
) || (sym
->attr
.pointer
)
12618 || (sym
->attr
.recursive
) || (sym
->attr
.pure
))
12620 if (sym
->as
&& sym
->as
->rank
)
12621 gfc_error ("CHARACTER(*) function %qs at %L cannot be "
12622 "array-valued", sym
->name
, &sym
->declared_at
);
12624 if (sym
->attr
.pointer
)
12625 gfc_error ("CHARACTER(*) function %qs at %L cannot be "
12626 "pointer-valued", sym
->name
, &sym
->declared_at
);
12628 if (sym
->attr
.pure
)
12629 gfc_error ("CHARACTER(*) function %qs at %L cannot be "
12630 "pure", sym
->name
, &sym
->declared_at
);
12632 if (sym
->attr
.recursive
)
12633 gfc_error ("CHARACTER(*) function %qs at %L cannot be "
12634 "recursive", sym
->name
, &sym
->declared_at
);
12639 /* Appendix B.2 of the standard. Contained functions give an
12640 error anyway. Deferred character length is an F2003 feature.
12641 Don't warn on intrinsic conversion functions, which start
12642 with two underscores. */
12643 if (!sym
->attr
.contained
&& !sym
->ts
.deferred
12644 && (sym
->name
[0] != '_' || sym
->name
[1] != '_'))
12645 gfc_notify_std (GFC_STD_F95_OBS
,
12646 "CHARACTER(*) function %qs at %L",
12647 sym
->name
, &sym
->declared_at
);
12650 /* F2008, C1218. */
12651 if (sym
->attr
.elemental
)
12653 if (sym
->attr
.proc_pointer
)
12655 gfc_error ("Procedure pointer %qs at %L shall not be elemental",
12656 sym
->name
, &sym
->declared_at
);
12659 if (sym
->attr
.dummy
)
12661 gfc_error ("Dummy procedure %qs at %L shall not be elemental",
12662 sym
->name
, &sym
->declared_at
);
12667 /* F2018, C15100: "The result of an elemental function shall be scalar,
12668 and shall not have the POINTER or ALLOCATABLE attribute." The scalar
12669 pointer is tested and caught elsewhere. */
12670 if (sym
->attr
.elemental
&& sym
->result
12671 && (sym
->result
->attr
.allocatable
|| sym
->result
->attr
.pointer
))
12673 gfc_error ("Function result variable %qs at %L of elemental "
12674 "function %qs shall not have an ALLOCATABLE or POINTER "
12675 "attribute", sym
->result
->name
,
12676 &sym
->result
->declared_at
, sym
->name
);
12680 if (sym
->attr
.is_bind_c
&& sym
->attr
.is_c_interop
!= 1)
12682 gfc_formal_arglist
*curr_arg
;
12683 int has_non_interop_arg
= 0;
12685 if (!verify_bind_c_sym (sym
, &(sym
->ts
), sym
->attr
.in_common
,
12686 sym
->common_block
))
12688 /* Clear these to prevent looking at them again if there was an
12690 sym
->attr
.is_bind_c
= 0;
12691 sym
->attr
.is_c_interop
= 0;
12692 sym
->ts
.is_c_interop
= 0;
12696 /* So far, no errors have been found. */
12697 sym
->attr
.is_c_interop
= 1;
12698 sym
->ts
.is_c_interop
= 1;
12701 curr_arg
= gfc_sym_get_dummy_args (sym
);
12702 while (curr_arg
!= NULL
)
12704 /* Skip implicitly typed dummy args here. */
12705 if (curr_arg
->sym
&& curr_arg
->sym
->attr
.implicit_type
== 0)
12706 if (!gfc_verify_c_interop_param (curr_arg
->sym
))
12707 /* If something is found to fail, record the fact so we
12708 can mark the symbol for the procedure as not being
12709 BIND(C) to try and prevent multiple errors being
12711 has_non_interop_arg
= 1;
12713 curr_arg
= curr_arg
->next
;
12716 /* See if any of the arguments were not interoperable and if so, clear
12717 the procedure symbol to prevent duplicate error messages. */
12718 if (has_non_interop_arg
!= 0)
12720 sym
->attr
.is_c_interop
= 0;
12721 sym
->ts
.is_c_interop
= 0;
12722 sym
->attr
.is_bind_c
= 0;
12726 if (!sym
->attr
.proc_pointer
)
12728 if (sym
->attr
.save
== SAVE_EXPLICIT
)
12730 gfc_error ("PROCEDURE attribute conflicts with SAVE attribute "
12731 "in %qs at %L", sym
->name
, &sym
->declared_at
);
12734 if (sym
->attr
.intent
)
12736 gfc_error ("PROCEDURE attribute conflicts with INTENT attribute "
12737 "in %qs at %L", sym
->name
, &sym
->declared_at
);
12740 if (sym
->attr
.subroutine
&& sym
->attr
.result
)
12742 gfc_error ("PROCEDURE attribute conflicts with RESULT attribute "
12743 "in %qs at %L", sym
->name
, &sym
->declared_at
);
12746 if (sym
->attr
.external
&& sym
->attr
.function
&& !sym
->attr
.module_procedure
12747 && ((sym
->attr
.if_source
== IFSRC_DECL
&& !sym
->attr
.procedure
)
12748 || sym
->attr
.contained
))
12750 gfc_error ("EXTERNAL attribute conflicts with FUNCTION attribute "
12751 "in %qs at %L", sym
->name
, &sym
->declared_at
);
12754 if (strcmp ("ppr@", sym
->name
) == 0)
12756 gfc_error ("Procedure pointer result %qs at %L "
12757 "is missing the pointer attribute",
12758 sym
->ns
->proc_name
->name
, &sym
->declared_at
);
12763 /* Assume that a procedure whose body is not known has references
12764 to external arrays. */
12765 if (sym
->attr
.if_source
!= IFSRC_DECL
)
12766 sym
->attr
.array_outer_dependency
= 1;
12768 /* Compare the characteristics of a module procedure with the
12769 interface declaration. Ideally this would be done with
12770 gfc_compare_interfaces but, at present, the formal interface
12771 cannot be copied to the ts.interface. */
12772 if (sym
->attr
.module_procedure
12773 && sym
->attr
.if_source
== IFSRC_DECL
)
12776 char name
[2*GFC_MAX_SYMBOL_LEN
+ 1];
12778 char *submodule_name
;
12779 strcpy (name
, sym
->ns
->proc_name
->name
);
12780 module_name
= strtok (name
, ".");
12781 submodule_name
= strtok (NULL
, ".");
12783 iface
= sym
->tlink
;
12786 /* Make sure that the result uses the correct charlen for deferred
12788 if (iface
&& sym
->result
12789 && iface
->ts
.type
== BT_CHARACTER
12790 && iface
->ts
.deferred
)
12791 sym
->result
->ts
.u
.cl
= iface
->ts
.u
.cl
;
12796 /* Check the procedure characteristics. */
12797 if (sym
->attr
.elemental
!= iface
->attr
.elemental
)
12799 gfc_error ("Mismatch in ELEMENTAL attribute between MODULE "
12800 "PROCEDURE at %L and its interface in %s",
12801 &sym
->declared_at
, module_name
);
12805 if (sym
->attr
.pure
!= iface
->attr
.pure
)
12807 gfc_error ("Mismatch in PURE attribute between MODULE "
12808 "PROCEDURE at %L and its interface in %s",
12809 &sym
->declared_at
, module_name
);
12813 if (sym
->attr
.recursive
!= iface
->attr
.recursive
)
12815 gfc_error ("Mismatch in RECURSIVE attribute between MODULE "
12816 "PROCEDURE at %L and its interface in %s",
12817 &sym
->declared_at
, module_name
);
12821 /* Check the result characteristics. */
12822 if (!gfc_check_result_characteristics (sym
, iface
, errmsg
, 200))
12824 gfc_error ("%s between the MODULE PROCEDURE declaration "
12825 "in MODULE %qs and the declaration at %L in "
12827 errmsg
, module_name
, &sym
->declared_at
,
12828 submodule_name
? submodule_name
: module_name
);
12833 /* Check the characteristics of the formal arguments. */
12834 if (sym
->formal
&& sym
->formal_ns
)
12836 for (arg
= sym
->formal
; arg
&& arg
->sym
; arg
= arg
->next
)
12839 gfc_traverse_ns (sym
->formal_ns
, compare_fsyms
);
12847 /* Resolve a list of finalizer procedures. That is, after they have hopefully
12848 been defined and we now know their defined arguments, check that they fulfill
12849 the requirements of the standard for procedures used as finalizers. */
12852 gfc_resolve_finalizers (gfc_symbol
* derived
, bool *finalizable
)
12854 gfc_finalizer
* list
;
12855 gfc_finalizer
** prev_link
; /* For removing wrong entries from the list. */
12856 bool result
= true;
12857 bool seen_scalar
= false;
12860 gfc_symbol
*parent
= gfc_get_derived_super_type (derived
);
12863 gfc_resolve_finalizers (parent
, finalizable
);
12865 /* Ensure that derived-type components have a their finalizers resolved. */
12866 bool has_final
= derived
->f2k_derived
&& derived
->f2k_derived
->finalizers
;
12867 for (c
= derived
->components
; c
; c
= c
->next
)
12868 if (c
->ts
.type
== BT_DERIVED
12869 && !c
->attr
.pointer
&& !c
->attr
.proc_pointer
&& !c
->attr
.allocatable
)
12871 bool has_final2
= false;
12872 if (!gfc_resolve_finalizers (c
->ts
.u
.derived
, &has_final2
))
12873 return false; /* Error. */
12874 has_final
= has_final
|| has_final2
;
12876 /* Return early if not finalizable. */
12880 *finalizable
= false;
12884 /* Walk over the list of finalizer-procedures, check them, and if any one
12885 does not fit in with the standard's definition, print an error and remove
12886 it from the list. */
12887 prev_link
= &derived
->f2k_derived
->finalizers
;
12888 for (list
= derived
->f2k_derived
->finalizers
; list
; list
= *prev_link
)
12890 gfc_formal_arglist
*dummy_args
;
12895 /* Skip this finalizer if we already resolved it. */
12896 if (list
->proc_tree
)
12898 if (list
->proc_tree
->n
.sym
->formal
->sym
->as
== NULL
12899 || list
->proc_tree
->n
.sym
->formal
->sym
->as
->rank
== 0)
12900 seen_scalar
= true;
12901 prev_link
= &(list
->next
);
12905 /* Check this exists and is a SUBROUTINE. */
12906 if (!list
->proc_sym
->attr
.subroutine
)
12908 gfc_error ("FINAL procedure %qs at %L is not a SUBROUTINE",
12909 list
->proc_sym
->name
, &list
->where
);
12913 /* We should have exactly one argument. */
12914 dummy_args
= gfc_sym_get_dummy_args (list
->proc_sym
);
12915 if (!dummy_args
|| dummy_args
->next
)
12917 gfc_error ("FINAL procedure at %L must have exactly one argument",
12921 arg
= dummy_args
->sym
;
12923 /* This argument must be of our type. */
12924 if (arg
->ts
.type
!= BT_DERIVED
|| arg
->ts
.u
.derived
!= derived
)
12926 gfc_error ("Argument of FINAL procedure at %L must be of type %qs",
12927 &arg
->declared_at
, derived
->name
);
12931 /* It must neither be a pointer nor allocatable nor optional. */
12932 if (arg
->attr
.pointer
)
12934 gfc_error ("Argument of FINAL procedure at %L must not be a POINTER",
12935 &arg
->declared_at
);
12938 if (arg
->attr
.allocatable
)
12940 gfc_error ("Argument of FINAL procedure at %L must not be"
12941 " ALLOCATABLE", &arg
->declared_at
);
12944 if (arg
->attr
.optional
)
12946 gfc_error ("Argument of FINAL procedure at %L must not be OPTIONAL",
12947 &arg
->declared_at
);
12951 /* It must not be INTENT(OUT). */
12952 if (arg
->attr
.intent
== INTENT_OUT
)
12954 gfc_error ("Argument of FINAL procedure at %L must not be"
12955 " INTENT(OUT)", &arg
->declared_at
);
12959 /* Warn if the procedure is non-scalar and not assumed shape. */
12960 if (warn_surprising
&& arg
->as
&& arg
->as
->rank
!= 0
12961 && arg
->as
->type
!= AS_ASSUMED_SHAPE
)
12962 gfc_warning (OPT_Wsurprising
,
12963 "Non-scalar FINAL procedure at %L should have assumed"
12964 " shape argument", &arg
->declared_at
);
12966 /* Check that it does not match in kind and rank with a FINAL procedure
12967 defined earlier. To really loop over the *earlier* declarations,
12968 we need to walk the tail of the list as new ones were pushed at the
12970 /* TODO: Handle kind parameters once they are implemented. */
12971 my_rank
= (arg
->as
? arg
->as
->rank
: 0);
12972 for (i
= list
->next
; i
; i
= i
->next
)
12974 gfc_formal_arglist
*dummy_args
;
12976 /* Argument list might be empty; that is an error signalled earlier,
12977 but we nevertheless continued resolving. */
12978 dummy_args
= gfc_sym_get_dummy_args (i
->proc_sym
);
12981 gfc_symbol
* i_arg
= dummy_args
->sym
;
12982 const int i_rank
= (i_arg
->as
? i_arg
->as
->rank
: 0);
12983 if (i_rank
== my_rank
)
12985 gfc_error ("FINAL procedure %qs declared at %L has the same"
12986 " rank (%d) as %qs",
12987 list
->proc_sym
->name
, &list
->where
, my_rank
,
12988 i
->proc_sym
->name
);
12994 /* Is this the/a scalar finalizer procedure? */
12996 seen_scalar
= true;
12998 /* Find the symtree for this procedure. */
12999 gcc_assert (!list
->proc_tree
);
13000 list
->proc_tree
= gfc_find_sym_in_symtree (list
->proc_sym
);
13002 prev_link
= &list
->next
;
13005 /* Remove wrong nodes immediately from the list so we don't risk any
13006 troubles in the future when they might fail later expectations. */
13009 *prev_link
= list
->next
;
13010 gfc_free_finalizer (i
);
13014 if (result
== false)
13017 /* Warn if we haven't seen a scalar finalizer procedure (but we know there
13018 were nodes in the list, must have been for arrays. It is surely a good
13019 idea to have a scalar version there if there's something to finalize. */
13020 if (warn_surprising
&& derived
->f2k_derived
->finalizers
&& !seen_scalar
)
13021 gfc_warning (OPT_Wsurprising
,
13022 "Only array FINAL procedures declared for derived type %qs"
13023 " defined at %L, suggest also scalar one",
13024 derived
->name
, &derived
->declared_at
);
13026 vtab
= gfc_find_derived_vtab (derived
);
13027 c
= vtab
->ts
.u
.derived
->components
->next
->next
->next
->next
->next
;
13028 gfc_set_sym_referenced (c
->initializer
->symtree
->n
.sym
);
13031 *finalizable
= true;
13037 /* Check if two GENERIC targets are ambiguous and emit an error is they are. */
13040 check_generic_tbp_ambiguity (gfc_tbp_generic
* t1
, gfc_tbp_generic
* t2
,
13041 const char* generic_name
, locus where
)
13043 gfc_symbol
*sym1
, *sym2
;
13044 const char *pass1
, *pass2
;
13045 gfc_formal_arglist
*dummy_args
;
13047 gcc_assert (t1
->specific
&& t2
->specific
);
13048 gcc_assert (!t1
->specific
->is_generic
);
13049 gcc_assert (!t2
->specific
->is_generic
);
13050 gcc_assert (t1
->is_operator
== t2
->is_operator
);
13052 sym1
= t1
->specific
->u
.specific
->n
.sym
;
13053 sym2
= t2
->specific
->u
.specific
->n
.sym
;
13058 /* Both must be SUBROUTINEs or both must be FUNCTIONs. */
13059 if (sym1
->attr
.subroutine
!= sym2
->attr
.subroutine
13060 || sym1
->attr
.function
!= sym2
->attr
.function
)
13062 gfc_error ("%qs and %qs can't be mixed FUNCTION/SUBROUTINE for"
13063 " GENERIC %qs at %L",
13064 sym1
->name
, sym2
->name
, generic_name
, &where
);
13068 /* Determine PASS arguments. */
13069 if (t1
->specific
->nopass
)
13071 else if (t1
->specific
->pass_arg
)
13072 pass1
= t1
->specific
->pass_arg
;
13075 dummy_args
= gfc_sym_get_dummy_args (t1
->specific
->u
.specific
->n
.sym
);
13077 pass1
= dummy_args
->sym
->name
;
13081 if (t2
->specific
->nopass
)
13083 else if (t2
->specific
->pass_arg
)
13084 pass2
= t2
->specific
->pass_arg
;
13087 dummy_args
= gfc_sym_get_dummy_args (t2
->specific
->u
.specific
->n
.sym
);
13089 pass2
= dummy_args
->sym
->name
;
13094 /* Compare the interfaces. */
13095 if (gfc_compare_interfaces (sym1
, sym2
, sym2
->name
, !t1
->is_operator
, 0,
13096 NULL
, 0, pass1
, pass2
))
13098 gfc_error ("%qs and %qs for GENERIC %qs at %L are ambiguous",
13099 sym1
->name
, sym2
->name
, generic_name
, &where
);
13107 /* Worker function for resolving a generic procedure binding; this is used to
13108 resolve GENERIC as well as user and intrinsic OPERATOR typebound procedures.
13110 The difference between those cases is finding possible inherited bindings
13111 that are overridden, as one has to look for them in tb_sym_root,
13112 tb_uop_root or tb_op, respectively. Thus the caller must already find
13113 the super-type and set p->overridden correctly. */
13116 resolve_tb_generic_targets (gfc_symbol
* super_type
,
13117 gfc_typebound_proc
* p
, const char* name
)
13119 gfc_tbp_generic
* target
;
13120 gfc_symtree
* first_target
;
13121 gfc_symtree
* inherited
;
13123 gcc_assert (p
&& p
->is_generic
);
13125 /* Try to find the specific bindings for the symtrees in our target-list. */
13126 gcc_assert (p
->u
.generic
);
13127 for (target
= p
->u
.generic
; target
; target
= target
->next
)
13128 if (!target
->specific
)
13130 gfc_typebound_proc
* overridden_tbp
;
13131 gfc_tbp_generic
* g
;
13132 const char* target_name
;
13134 target_name
= target
->specific_st
->name
;
13136 /* Defined for this type directly. */
13137 if (target
->specific_st
->n
.tb
&& !target
->specific_st
->n
.tb
->error
)
13139 target
->specific
= target
->specific_st
->n
.tb
;
13140 goto specific_found
;
13143 /* Look for an inherited specific binding. */
13146 inherited
= gfc_find_typebound_proc (super_type
, NULL
, target_name
,
13151 gcc_assert (inherited
->n
.tb
);
13152 target
->specific
= inherited
->n
.tb
;
13153 goto specific_found
;
13157 gfc_error ("Undefined specific binding %qs as target of GENERIC %qs"
13158 " at %L", target_name
, name
, &p
->where
);
13161 /* Once we've found the specific binding, check it is not ambiguous with
13162 other specifics already found or inherited for the same GENERIC. */
13164 gcc_assert (target
->specific
);
13166 /* This must really be a specific binding! */
13167 if (target
->specific
->is_generic
)
13169 gfc_error ("GENERIC %qs at %L must target a specific binding,"
13170 " %qs is GENERIC, too", name
, &p
->where
, target_name
);
13174 /* Check those already resolved on this type directly. */
13175 for (g
= p
->u
.generic
; g
; g
= g
->next
)
13176 if (g
!= target
&& g
->specific
13177 && !check_generic_tbp_ambiguity (target
, g
, name
, p
->where
))
13180 /* Check for ambiguity with inherited specific targets. */
13181 for (overridden_tbp
= p
->overridden
; overridden_tbp
;
13182 overridden_tbp
= overridden_tbp
->overridden
)
13183 if (overridden_tbp
->is_generic
)
13185 for (g
= overridden_tbp
->u
.generic
; g
; g
= g
->next
)
13187 gcc_assert (g
->specific
);
13188 if (!check_generic_tbp_ambiguity (target
, g
, name
, p
->where
))
13194 /* If we attempt to "overwrite" a specific binding, this is an error. */
13195 if (p
->overridden
&& !p
->overridden
->is_generic
)
13197 gfc_error ("GENERIC %qs at %L can't overwrite specific binding with"
13198 " the same name", name
, &p
->where
);
13202 /* Take the SUBROUTINE/FUNCTION attributes of the first specific target, as
13203 all must have the same attributes here. */
13204 first_target
= p
->u
.generic
->specific
->u
.specific
;
13205 gcc_assert (first_target
);
13206 p
->subroutine
= first_target
->n
.sym
->attr
.subroutine
;
13207 p
->function
= first_target
->n
.sym
->attr
.function
;
13213 /* Resolve a GENERIC procedure binding for a derived type. */
13216 resolve_typebound_generic (gfc_symbol
* derived
, gfc_symtree
* st
)
13218 gfc_symbol
* super_type
;
13220 /* Find the overridden binding if any. */
13221 st
->n
.tb
->overridden
= NULL
;
13222 super_type
= gfc_get_derived_super_type (derived
);
13225 gfc_symtree
* overridden
;
13226 overridden
= gfc_find_typebound_proc (super_type
, NULL
, st
->name
,
13229 if (overridden
&& overridden
->n
.tb
)
13230 st
->n
.tb
->overridden
= overridden
->n
.tb
;
13233 /* Resolve using worker function. */
13234 return resolve_tb_generic_targets (super_type
, st
->n
.tb
, st
->name
);
13238 /* Retrieve the target-procedure of an operator binding and do some checks in
13239 common for intrinsic and user-defined type-bound operators. */
13242 get_checked_tb_operator_target (gfc_tbp_generic
* target
, locus where
)
13244 gfc_symbol
* target_proc
;
13246 gcc_assert (target
->specific
&& !target
->specific
->is_generic
);
13247 target_proc
= target
->specific
->u
.specific
->n
.sym
;
13248 gcc_assert (target_proc
);
13250 /* F08:C468. All operator bindings must have a passed-object dummy argument. */
13251 if (target
->specific
->nopass
)
13253 gfc_error ("Type-bound operator at %L can't be NOPASS", &where
);
13257 return target_proc
;
13261 /* Resolve a type-bound intrinsic operator. */
13264 resolve_typebound_intrinsic_op (gfc_symbol
* derived
, gfc_intrinsic_op op
,
13265 gfc_typebound_proc
* p
)
13267 gfc_symbol
* super_type
;
13268 gfc_tbp_generic
* target
;
13270 /* If there's already an error here, do nothing (but don't fail again). */
13274 /* Operators should always be GENERIC bindings. */
13275 gcc_assert (p
->is_generic
);
13277 /* Look for an overridden binding. */
13278 super_type
= gfc_get_derived_super_type (derived
);
13279 if (super_type
&& super_type
->f2k_derived
)
13280 p
->overridden
= gfc_find_typebound_intrinsic_op (super_type
, NULL
,
13283 p
->overridden
= NULL
;
13285 /* Resolve general GENERIC properties using worker function. */
13286 if (!resolve_tb_generic_targets (super_type
, p
, gfc_op2string(op
)))
13289 /* Check the targets to be procedures of correct interface. */
13290 for (target
= p
->u
.generic
; target
; target
= target
->next
)
13292 gfc_symbol
* target_proc
;
13294 target_proc
= get_checked_tb_operator_target (target
, p
->where
);
13298 if (!gfc_check_operator_interface (target_proc
, op
, p
->where
))
13301 /* Add target to non-typebound operator list. */
13302 if (!target
->specific
->deferred
&& !derived
->attr
.use_assoc
13303 && p
->access
!= ACCESS_PRIVATE
&& derived
->ns
== gfc_current_ns
)
13305 gfc_interface
*head
, *intr
;
13307 /* Preempt 'gfc_check_new_interface' for submodules, where the
13308 mechanism for handling module procedures winds up resolving
13309 operator interfaces twice and would otherwise cause an error. */
13310 for (intr
= derived
->ns
->op
[op
]; intr
; intr
= intr
->next
)
13311 if (intr
->sym
== target_proc
13312 && target_proc
->attr
.used_in_submodule
)
13315 if (!gfc_check_new_interface (derived
->ns
->op
[op
],
13316 target_proc
, p
->where
))
13318 head
= derived
->ns
->op
[op
];
13319 intr
= gfc_get_interface ();
13320 intr
->sym
= target_proc
;
13321 intr
->where
= p
->where
;
13323 derived
->ns
->op
[op
] = intr
;
13335 /* Resolve a type-bound user operator (tree-walker callback). */
13337 static gfc_symbol
* resolve_bindings_derived
;
13338 static bool resolve_bindings_result
;
13340 static bool check_uop_procedure (gfc_symbol
* sym
, locus where
);
13343 resolve_typebound_user_op (gfc_symtree
* stree
)
13345 gfc_symbol
* super_type
;
13346 gfc_tbp_generic
* target
;
13348 gcc_assert (stree
&& stree
->n
.tb
);
13350 if (stree
->n
.tb
->error
)
13353 /* Operators should always be GENERIC bindings. */
13354 gcc_assert (stree
->n
.tb
->is_generic
);
13356 /* Find overridden procedure, if any. */
13357 super_type
= gfc_get_derived_super_type (resolve_bindings_derived
);
13358 if (super_type
&& super_type
->f2k_derived
)
13360 gfc_symtree
* overridden
;
13361 overridden
= gfc_find_typebound_user_op (super_type
, NULL
,
13362 stree
->name
, true, NULL
);
13364 if (overridden
&& overridden
->n
.tb
)
13365 stree
->n
.tb
->overridden
= overridden
->n
.tb
;
13368 stree
->n
.tb
->overridden
= NULL
;
13370 /* Resolve basically using worker function. */
13371 if (!resolve_tb_generic_targets (super_type
, stree
->n
.tb
, stree
->name
))
13374 /* Check the targets to be functions of correct interface. */
13375 for (target
= stree
->n
.tb
->u
.generic
; target
; target
= target
->next
)
13377 gfc_symbol
* target_proc
;
13379 target_proc
= get_checked_tb_operator_target (target
, stree
->n
.tb
->where
);
13383 if (!check_uop_procedure (target_proc
, stree
->n
.tb
->where
))
13390 resolve_bindings_result
= false;
13391 stree
->n
.tb
->error
= 1;
13395 /* Resolve the type-bound procedures for a derived type. */
13398 resolve_typebound_procedure (gfc_symtree
* stree
)
13402 gfc_symbol
* me_arg
;
13403 gfc_symbol
* super_type
;
13404 gfc_component
* comp
;
13406 gcc_assert (stree
);
13408 /* Undefined specific symbol from GENERIC target definition. */
13412 if (stree
->n
.tb
->error
)
13415 /* If this is a GENERIC binding, use that routine. */
13416 if (stree
->n
.tb
->is_generic
)
13418 if (!resolve_typebound_generic (resolve_bindings_derived
, stree
))
13423 /* Get the target-procedure to check it. */
13424 gcc_assert (!stree
->n
.tb
->is_generic
);
13425 gcc_assert (stree
->n
.tb
->u
.specific
);
13426 proc
= stree
->n
.tb
->u
.specific
->n
.sym
;
13427 where
= stree
->n
.tb
->where
;
13429 /* Default access should already be resolved from the parser. */
13430 gcc_assert (stree
->n
.tb
->access
!= ACCESS_UNKNOWN
);
13432 if (stree
->n
.tb
->deferred
)
13434 if (!check_proc_interface (proc
, &where
))
13439 /* Check for F08:C465. */
13440 if ((!proc
->attr
.subroutine
&& !proc
->attr
.function
)
13441 || (proc
->attr
.proc
!= PROC_MODULE
13442 && proc
->attr
.if_source
!= IFSRC_IFBODY
)
13443 || proc
->attr
.abstract
)
13445 gfc_error ("%qs must be a module procedure or an external procedure with"
13446 " an explicit interface at %L", proc
->name
, &where
);
13451 stree
->n
.tb
->subroutine
= proc
->attr
.subroutine
;
13452 stree
->n
.tb
->function
= proc
->attr
.function
;
13454 /* Find the super-type of the current derived type. We could do this once and
13455 store in a global if speed is needed, but as long as not I believe this is
13456 more readable and clearer. */
13457 super_type
= gfc_get_derived_super_type (resolve_bindings_derived
);
13459 /* If PASS, resolve and check arguments if not already resolved / loaded
13460 from a .mod file. */
13461 if (!stree
->n
.tb
->nopass
&& stree
->n
.tb
->pass_arg_num
== 0)
13463 gfc_formal_arglist
*dummy_args
;
13465 dummy_args
= gfc_sym_get_dummy_args (proc
);
13466 if (stree
->n
.tb
->pass_arg
)
13468 gfc_formal_arglist
*i
;
13470 /* If an explicit passing argument name is given, walk the arg-list
13471 and look for it. */
13474 stree
->n
.tb
->pass_arg_num
= 1;
13475 for (i
= dummy_args
; i
; i
= i
->next
)
13477 if (!strcmp (i
->sym
->name
, stree
->n
.tb
->pass_arg
))
13482 ++stree
->n
.tb
->pass_arg_num
;
13487 gfc_error ("Procedure %qs with PASS(%s) at %L has no"
13489 proc
->name
, stree
->n
.tb
->pass_arg
, &where
,
13490 stree
->n
.tb
->pass_arg
);
13496 /* Otherwise, take the first one; there should in fact be at least
13498 stree
->n
.tb
->pass_arg_num
= 1;
13501 gfc_error ("Procedure %qs with PASS at %L must have at"
13502 " least one argument", proc
->name
, &where
);
13505 me_arg
= dummy_args
->sym
;
13508 /* Now check that the argument-type matches and the passed-object
13509 dummy argument is generally fine. */
13511 gcc_assert (me_arg
);
13513 if (me_arg
->ts
.type
!= BT_CLASS
)
13515 gfc_error ("Non-polymorphic passed-object dummy argument of %qs"
13516 " at %L", proc
->name
, &where
);
13520 if (CLASS_DATA (me_arg
)->ts
.u
.derived
13521 != resolve_bindings_derived
)
13523 gfc_error ("Argument %qs of %qs with PASS(%s) at %L must be of"
13524 " the derived-type %qs", me_arg
->name
, proc
->name
,
13525 me_arg
->name
, &where
, resolve_bindings_derived
->name
);
13529 gcc_assert (me_arg
->ts
.type
== BT_CLASS
);
13530 if (CLASS_DATA (me_arg
)->as
&& CLASS_DATA (me_arg
)->as
->rank
!= 0)
13532 gfc_error ("Passed-object dummy argument of %qs at %L must be"
13533 " scalar", proc
->name
, &where
);
13536 if (CLASS_DATA (me_arg
)->attr
.allocatable
)
13538 gfc_error ("Passed-object dummy argument of %qs at %L must not"
13539 " be ALLOCATABLE", proc
->name
, &where
);
13542 if (CLASS_DATA (me_arg
)->attr
.class_pointer
)
13544 gfc_error ("Passed-object dummy argument of %qs at %L must not"
13545 " be POINTER", proc
->name
, &where
);
13550 /* If we are extending some type, check that we don't override a procedure
13551 flagged NON_OVERRIDABLE. */
13552 stree
->n
.tb
->overridden
= NULL
;
13555 gfc_symtree
* overridden
;
13556 overridden
= gfc_find_typebound_proc (super_type
, NULL
,
13557 stree
->name
, true, NULL
);
13561 if (overridden
->n
.tb
)
13562 stree
->n
.tb
->overridden
= overridden
->n
.tb
;
13564 if (!gfc_check_typebound_override (stree
, overridden
))
13569 /* See if there's a name collision with a component directly in this type. */
13570 for (comp
= resolve_bindings_derived
->components
; comp
; comp
= comp
->next
)
13571 if (!strcmp (comp
->name
, stree
->name
))
13573 gfc_error ("Procedure %qs at %L has the same name as a component of"
13575 stree
->name
, &where
, resolve_bindings_derived
->name
);
13579 /* Try to find a name collision with an inherited component. */
13580 if (super_type
&& gfc_find_component (super_type
, stree
->name
, true, true,
13583 gfc_error ("Procedure %qs at %L has the same name as an inherited"
13584 " component of %qs",
13585 stree
->name
, &where
, resolve_bindings_derived
->name
);
13589 stree
->n
.tb
->error
= 0;
13593 resolve_bindings_result
= false;
13594 stree
->n
.tb
->error
= 1;
13599 resolve_typebound_procedures (gfc_symbol
* derived
)
13602 gfc_symbol
* super_type
;
13604 if (!derived
->f2k_derived
|| !derived
->f2k_derived
->tb_sym_root
)
13607 super_type
= gfc_get_derived_super_type (derived
);
13609 resolve_symbol (super_type
);
13611 resolve_bindings_derived
= derived
;
13612 resolve_bindings_result
= true;
13614 if (derived
->f2k_derived
->tb_sym_root
)
13615 gfc_traverse_symtree (derived
->f2k_derived
->tb_sym_root
,
13616 &resolve_typebound_procedure
);
13618 if (derived
->f2k_derived
->tb_uop_root
)
13619 gfc_traverse_symtree (derived
->f2k_derived
->tb_uop_root
,
13620 &resolve_typebound_user_op
);
13622 for (op
= 0; op
!= GFC_INTRINSIC_OPS
; ++op
)
13624 gfc_typebound_proc
* p
= derived
->f2k_derived
->tb_op
[op
];
13625 if (p
&& !resolve_typebound_intrinsic_op (derived
,
13626 (gfc_intrinsic_op
)op
, p
))
13627 resolve_bindings_result
= false;
13630 return resolve_bindings_result
;
13634 /* Add a derived type to the dt_list. The dt_list is used in trans-types.c
13635 to give all identical derived types the same backend_decl. */
13637 add_dt_to_dt_list (gfc_symbol
*derived
)
13639 if (!derived
->dt_next
)
13641 if (gfc_derived_types
)
13643 derived
->dt_next
= gfc_derived_types
->dt_next
;
13644 gfc_derived_types
->dt_next
= derived
;
13648 derived
->dt_next
= derived
;
13650 gfc_derived_types
= derived
;
13655 /* Ensure that a derived-type is really not abstract, meaning that every
13656 inherited DEFERRED binding is overridden by a non-DEFERRED one. */
13659 ensure_not_abstract_walker (gfc_symbol
* sub
, gfc_symtree
* st
)
13664 if (!ensure_not_abstract_walker (sub
, st
->left
))
13666 if (!ensure_not_abstract_walker (sub
, st
->right
))
13669 if (st
->n
.tb
&& st
->n
.tb
->deferred
)
13671 gfc_symtree
* overriding
;
13672 overriding
= gfc_find_typebound_proc (sub
, NULL
, st
->name
, true, NULL
);
13675 gcc_assert (overriding
->n
.tb
);
13676 if (overriding
->n
.tb
->deferred
)
13678 gfc_error ("Derived-type %qs declared at %L must be ABSTRACT because"
13679 " %qs is DEFERRED and not overridden",
13680 sub
->name
, &sub
->declared_at
, st
->name
);
13689 ensure_not_abstract (gfc_symbol
* sub
, gfc_symbol
* ancestor
)
13691 /* The algorithm used here is to recursively travel up the ancestry of sub
13692 and for each ancestor-type, check all bindings. If any of them is
13693 DEFERRED, look it up starting from sub and see if the found (overriding)
13694 binding is not DEFERRED.
13695 This is not the most efficient way to do this, but it should be ok and is
13696 clearer than something sophisticated. */
13698 gcc_assert (ancestor
&& !sub
->attr
.abstract
);
13700 if (!ancestor
->attr
.abstract
)
13703 /* Walk bindings of this ancestor. */
13704 if (ancestor
->f2k_derived
)
13707 t
= ensure_not_abstract_walker (sub
, ancestor
->f2k_derived
->tb_sym_root
);
13712 /* Find next ancestor type and recurse on it. */
13713 ancestor
= gfc_get_derived_super_type (ancestor
);
13715 return ensure_not_abstract (sub
, ancestor
);
13721 /* This check for typebound defined assignments is done recursively
13722 since the order in which derived types are resolved is not always in
13723 order of the declarations. */
13726 check_defined_assignments (gfc_symbol
*derived
)
13730 for (c
= derived
->components
; c
; c
= c
->next
)
13732 if (!gfc_bt_struct (c
->ts
.type
)
13734 || c
->attr
.allocatable
13735 || c
->attr
.proc_pointer_comp
13736 || c
->attr
.class_pointer
13737 || c
->attr
.proc_pointer
)
13740 if (c
->ts
.u
.derived
->attr
.defined_assign_comp
13741 || (c
->ts
.u
.derived
->f2k_derived
13742 && c
->ts
.u
.derived
->f2k_derived
->tb_op
[INTRINSIC_ASSIGN
]))
13744 derived
->attr
.defined_assign_comp
= 1;
13748 check_defined_assignments (c
->ts
.u
.derived
);
13749 if (c
->ts
.u
.derived
->attr
.defined_assign_comp
)
13751 derived
->attr
.defined_assign_comp
= 1;
13758 /* Resolve a single component of a derived type or structure. */
13761 resolve_component (gfc_component
*c
, gfc_symbol
*sym
)
13763 gfc_symbol
*super_type
;
13765 if (c
->attr
.artificial
)
13768 /* Do not allow vtype components to be resolved in nameless namespaces
13769 such as block data because the procedure pointers will cause ICEs
13770 and vtables are not needed in these contexts. */
13771 if (sym
->attr
.vtype
&& sym
->attr
.use_assoc
13772 && sym
->ns
->proc_name
== NULL
)
13776 if ((!sym
->attr
.is_class
|| c
!= sym
->components
)
13777 && c
->attr
.codimension
13778 && (!c
->attr
.allocatable
|| (c
->as
&& c
->as
->type
!= AS_DEFERRED
)))
13780 gfc_error ("Coarray component %qs at %L must be allocatable with "
13781 "deferred shape", c
->name
, &c
->loc
);
13786 if (c
->attr
.codimension
&& c
->ts
.type
== BT_DERIVED
13787 && c
->ts
.u
.derived
->ts
.is_iso_c
)
13789 gfc_error ("Component %qs at %L of TYPE(C_PTR) or TYPE(C_FUNPTR) "
13790 "shall not be a coarray", c
->name
, &c
->loc
);
13795 if (gfc_bt_struct (c
->ts
.type
) && c
->ts
.u
.derived
->attr
.coarray_comp
13796 && (c
->attr
.codimension
|| c
->attr
.pointer
|| c
->attr
.dimension
13797 || c
->attr
.allocatable
))
13799 gfc_error ("Component %qs at %L with coarray component "
13800 "shall be a nonpointer, nonallocatable scalar",
13806 if (c
->attr
.contiguous
&& (!c
->attr
.dimension
|| !c
->attr
.pointer
))
13808 gfc_error ("Component %qs at %L has the CONTIGUOUS attribute but "
13809 "is not an array pointer", c
->name
, &c
->loc
);
13813 /* F2003, 15.2.1 - length has to be one. */
13814 if (sym
->attr
.is_bind_c
&& c
->ts
.type
== BT_CHARACTER
13815 && (c
->ts
.u
.cl
== NULL
|| c
->ts
.u
.cl
->length
== NULL
13816 || !gfc_is_constant_expr (c
->ts
.u
.cl
->length
)
13817 || mpz_cmp_si (c
->ts
.u
.cl
->length
->value
.integer
, 1) != 0))
13819 gfc_error ("Component %qs of BIND(C) type at %L must have length one",
13824 if (c
->attr
.proc_pointer
&& c
->ts
.interface
)
13826 gfc_symbol
*ifc
= c
->ts
.interface
;
13828 if (!sym
->attr
.vtype
&& !check_proc_interface (ifc
, &c
->loc
))
13834 if (ifc
->attr
.if_source
|| ifc
->attr
.intrinsic
)
13836 /* Resolve interface and copy attributes. */
13837 if (ifc
->formal
&& !ifc
->formal_ns
)
13838 resolve_symbol (ifc
);
13839 if (ifc
->attr
.intrinsic
)
13840 gfc_resolve_intrinsic (ifc
, &ifc
->declared_at
);
13844 c
->ts
= ifc
->result
->ts
;
13845 c
->attr
.allocatable
= ifc
->result
->attr
.allocatable
;
13846 c
->attr
.pointer
= ifc
->result
->attr
.pointer
;
13847 c
->attr
.dimension
= ifc
->result
->attr
.dimension
;
13848 c
->as
= gfc_copy_array_spec (ifc
->result
->as
);
13849 c
->attr
.class_ok
= ifc
->result
->attr
.class_ok
;
13854 c
->attr
.allocatable
= ifc
->attr
.allocatable
;
13855 c
->attr
.pointer
= ifc
->attr
.pointer
;
13856 c
->attr
.dimension
= ifc
->attr
.dimension
;
13857 c
->as
= gfc_copy_array_spec (ifc
->as
);
13858 c
->attr
.class_ok
= ifc
->attr
.class_ok
;
13860 c
->ts
.interface
= ifc
;
13861 c
->attr
.function
= ifc
->attr
.function
;
13862 c
->attr
.subroutine
= ifc
->attr
.subroutine
;
13864 c
->attr
.pure
= ifc
->attr
.pure
;
13865 c
->attr
.elemental
= ifc
->attr
.elemental
;
13866 c
->attr
.recursive
= ifc
->attr
.recursive
;
13867 c
->attr
.always_explicit
= ifc
->attr
.always_explicit
;
13868 c
->attr
.ext_attr
|= ifc
->attr
.ext_attr
;
13869 /* Copy char length. */
13870 if (ifc
->ts
.type
== BT_CHARACTER
&& ifc
->ts
.u
.cl
)
13872 gfc_charlen
*cl
= gfc_new_charlen (sym
->ns
, ifc
->ts
.u
.cl
);
13873 if (cl
->length
&& !cl
->resolved
13874 && !gfc_resolve_expr (cl
->length
))
13883 else if (c
->attr
.proc_pointer
&& c
->ts
.type
== BT_UNKNOWN
)
13885 /* Since PPCs are not implicitly typed, a PPC without an explicit
13886 interface must be a subroutine. */
13887 gfc_add_subroutine (&c
->attr
, c
->name
, &c
->loc
);
13890 /* Procedure pointer components: Check PASS arg. */
13891 if (c
->attr
.proc_pointer
&& !c
->tb
->nopass
&& c
->tb
->pass_arg_num
== 0
13892 && !sym
->attr
.vtype
)
13894 gfc_symbol
* me_arg
;
13896 if (c
->tb
->pass_arg
)
13898 gfc_formal_arglist
* i
;
13900 /* If an explicit passing argument name is given, walk the arg-list
13901 and look for it. */
13904 c
->tb
->pass_arg_num
= 1;
13905 for (i
= c
->ts
.interface
->formal
; i
; i
= i
->next
)
13907 if (!strcmp (i
->sym
->name
, c
->tb
->pass_arg
))
13912 c
->tb
->pass_arg_num
++;
13917 gfc_error ("Procedure pointer component %qs with PASS(%s) "
13918 "at %L has no argument %qs", c
->name
,
13919 c
->tb
->pass_arg
, &c
->loc
, c
->tb
->pass_arg
);
13926 /* Otherwise, take the first one; there should in fact be at least
13928 c
->tb
->pass_arg_num
= 1;
13929 if (!c
->ts
.interface
->formal
)
13931 gfc_error ("Procedure pointer component %qs with PASS at %L "
13932 "must have at least one argument",
13937 me_arg
= c
->ts
.interface
->formal
->sym
;
13940 /* Now check that the argument-type matches. */
13941 gcc_assert (me_arg
);
13942 if ((me_arg
->ts
.type
!= BT_DERIVED
&& me_arg
->ts
.type
!= BT_CLASS
)
13943 || (me_arg
->ts
.type
== BT_DERIVED
&& me_arg
->ts
.u
.derived
!= sym
)
13944 || (me_arg
->ts
.type
== BT_CLASS
13945 && CLASS_DATA (me_arg
)->ts
.u
.derived
!= sym
))
13947 gfc_error ("Argument %qs of %qs with PASS(%s) at %L must be of"
13948 " the derived type %qs", me_arg
->name
, c
->name
,
13949 me_arg
->name
, &c
->loc
, sym
->name
);
13954 /* Check for F03:C453. */
13955 if (CLASS_DATA (me_arg
)->attr
.dimension
)
13957 gfc_error ("Argument %qs of %qs with PASS(%s) at %L "
13958 "must be scalar", me_arg
->name
, c
->name
, me_arg
->name
,
13964 if (CLASS_DATA (me_arg
)->attr
.class_pointer
)
13966 gfc_error ("Argument %qs of %qs with PASS(%s) at %L "
13967 "may not have the POINTER attribute", me_arg
->name
,
13968 c
->name
, me_arg
->name
, &c
->loc
);
13973 if (CLASS_DATA (me_arg
)->attr
.allocatable
)
13975 gfc_error ("Argument %qs of %qs with PASS(%s) at %L "
13976 "may not be ALLOCATABLE", me_arg
->name
, c
->name
,
13977 me_arg
->name
, &c
->loc
);
13982 if (gfc_type_is_extensible (sym
) && me_arg
->ts
.type
!= BT_CLASS
)
13984 gfc_error ("Non-polymorphic passed-object dummy argument of %qs"
13985 " at %L", c
->name
, &c
->loc
);
13991 /* Check type-spec if this is not the parent-type component. */
13992 if (((sym
->attr
.is_class
13993 && (!sym
->components
->ts
.u
.derived
->attr
.extension
13994 || c
!= sym
->components
->ts
.u
.derived
->components
))
13995 || (!sym
->attr
.is_class
13996 && (!sym
->attr
.extension
|| c
!= sym
->components
)))
13997 && !sym
->attr
.vtype
13998 && !resolve_typespec_used (&c
->ts
, &c
->loc
, c
->name
))
14001 super_type
= gfc_get_derived_super_type (sym
);
14003 /* If this type is an extension, set the accessibility of the parent
14006 && ((sym
->attr
.is_class
14007 && c
== sym
->components
->ts
.u
.derived
->components
)
14008 || (!sym
->attr
.is_class
&& c
== sym
->components
))
14009 && strcmp (super_type
->name
, c
->name
) == 0)
14010 c
->attr
.access
= super_type
->attr
.access
;
14012 /* If this type is an extension, see if this component has the same name
14013 as an inherited type-bound procedure. */
14014 if (super_type
&& !sym
->attr
.is_class
14015 && gfc_find_typebound_proc (super_type
, NULL
, c
->name
, true, NULL
))
14017 gfc_error ("Component %qs of %qs at %L has the same name as an"
14018 " inherited type-bound procedure",
14019 c
->name
, sym
->name
, &c
->loc
);
14023 if (c
->ts
.type
== BT_CHARACTER
&& !c
->attr
.proc_pointer
14024 && !c
->ts
.deferred
)
14026 if (c
->ts
.u
.cl
->length
== NULL
14027 || (!resolve_charlen(c
->ts
.u
.cl
))
14028 || !gfc_is_constant_expr (c
->ts
.u
.cl
->length
))
14030 gfc_error ("Character length of component %qs needs to "
14031 "be a constant specification expression at %L",
14033 c
->ts
.u
.cl
->length
? &c
->ts
.u
.cl
->length
->where
: &c
->loc
);
14038 if (c
->ts
.type
== BT_CHARACTER
&& c
->ts
.deferred
14039 && !c
->attr
.pointer
&& !c
->attr
.allocatable
)
14041 gfc_error ("Character component %qs of %qs at %L with deferred "
14042 "length must be a POINTER or ALLOCATABLE",
14043 c
->name
, sym
->name
, &c
->loc
);
14047 /* Add the hidden deferred length field. */
14048 if (c
->ts
.type
== BT_CHARACTER
14049 && (c
->ts
.deferred
|| c
->attr
.pdt_string
)
14050 && !c
->attr
.function
14051 && !sym
->attr
.is_class
)
14053 char name
[GFC_MAX_SYMBOL_LEN
+9];
14054 gfc_component
*strlen
;
14055 sprintf (name
, "_%s_length", c
->name
);
14056 strlen
= gfc_find_component (sym
, name
, true, true, NULL
);
14057 if (strlen
== NULL
)
14059 if (!gfc_add_component (sym
, name
, &strlen
))
14061 strlen
->ts
.type
= BT_INTEGER
;
14062 strlen
->ts
.kind
= gfc_charlen_int_kind
;
14063 strlen
->attr
.access
= ACCESS_PRIVATE
;
14064 strlen
->attr
.artificial
= 1;
14068 if (c
->ts
.type
== BT_DERIVED
14069 && sym
->component_access
!= ACCESS_PRIVATE
14070 && gfc_check_symbol_access (sym
)
14071 && !is_sym_host_assoc (c
->ts
.u
.derived
, sym
->ns
)
14072 && !c
->ts
.u
.derived
->attr
.use_assoc
14073 && !gfc_check_symbol_access (c
->ts
.u
.derived
)
14074 && !gfc_notify_std (GFC_STD_F2003
, "the component %qs is a "
14075 "PRIVATE type and cannot be a component of "
14076 "%qs, which is PUBLIC at %L", c
->name
,
14077 sym
->name
, &sym
->declared_at
))
14080 if ((sym
->attr
.sequence
|| sym
->attr
.is_bind_c
) && c
->ts
.type
== BT_CLASS
)
14082 gfc_error ("Polymorphic component %s at %L in SEQUENCE or BIND(C) "
14083 "type %s", c
->name
, &c
->loc
, sym
->name
);
14087 if (sym
->attr
.sequence
)
14089 if (c
->ts
.type
== BT_DERIVED
&& c
->ts
.u
.derived
->attr
.sequence
== 0)
14091 gfc_error ("Component %s of SEQUENCE type declared at %L does "
14092 "not have the SEQUENCE attribute",
14093 c
->ts
.u
.derived
->name
, &sym
->declared_at
);
14098 if (c
->ts
.type
== BT_DERIVED
&& c
->ts
.u
.derived
->attr
.generic
)
14099 c
->ts
.u
.derived
= gfc_find_dt_in_generic (c
->ts
.u
.derived
);
14100 else if (c
->ts
.type
== BT_CLASS
&& c
->attr
.class_ok
14101 && CLASS_DATA (c
)->ts
.u
.derived
->attr
.generic
)
14102 CLASS_DATA (c
)->ts
.u
.derived
14103 = gfc_find_dt_in_generic (CLASS_DATA (c
)->ts
.u
.derived
);
14105 /* If an allocatable component derived type is of the same type as
14106 the enclosing derived type, we need a vtable generating so that
14107 the __deallocate procedure is created. */
14108 if ((c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
14109 && c
->ts
.u
.derived
== sym
&& c
->attr
.allocatable
== 1)
14110 gfc_find_vtab (&c
->ts
);
14112 /* Ensure that all the derived type components are put on the
14113 derived type list; even in formal namespaces, where derived type
14114 pointer components might not have been declared. */
14115 if (c
->ts
.type
== BT_DERIVED
14117 && c
->ts
.u
.derived
->components
14119 && sym
!= c
->ts
.u
.derived
)
14120 add_dt_to_dt_list (c
->ts
.u
.derived
);
14122 if (!gfc_resolve_array_spec (c
->as
,
14123 !(c
->attr
.pointer
|| c
->attr
.proc_pointer
14124 || c
->attr
.allocatable
)))
14127 if (c
->initializer
&& !sym
->attr
.vtype
14128 && !c
->attr
.pdt_kind
&& !c
->attr
.pdt_len
14129 && !gfc_check_assign_symbol (sym
, c
, c
->initializer
))
14136 /* Be nice about the locus for a structure expression - show the locus of the
14137 first non-null sub-expression if we can. */
14140 cons_where (gfc_expr
*struct_expr
)
14142 gfc_constructor
*cons
;
14144 gcc_assert (struct_expr
&& struct_expr
->expr_type
== EXPR_STRUCTURE
);
14146 cons
= gfc_constructor_first (struct_expr
->value
.constructor
);
14147 for (; cons
; cons
= gfc_constructor_next (cons
))
14149 if (cons
->expr
&& cons
->expr
->expr_type
!= EXPR_NULL
)
14150 return &cons
->expr
->where
;
14153 return &struct_expr
->where
;
14156 /* Resolve the components of a structure type. Much less work than derived
14160 resolve_fl_struct (gfc_symbol
*sym
)
14163 gfc_expr
*init
= NULL
;
14166 /* Make sure UNIONs do not have overlapping initializers. */
14167 if (sym
->attr
.flavor
== FL_UNION
)
14169 for (c
= sym
->components
; c
; c
= c
->next
)
14171 if (init
&& c
->initializer
)
14173 gfc_error ("Conflicting initializers in union at %L and %L",
14174 cons_where (init
), cons_where (c
->initializer
));
14175 gfc_free_expr (c
->initializer
);
14176 c
->initializer
= NULL
;
14179 init
= c
->initializer
;
14184 for (c
= sym
->components
; c
; c
= c
->next
)
14185 if (!resolve_component (c
, sym
))
14191 if (sym
->components
)
14192 add_dt_to_dt_list (sym
);
14198 /* Resolve the components of a derived type. This does not have to wait until
14199 resolution stage, but can be done as soon as the dt declaration has been
14203 resolve_fl_derived0 (gfc_symbol
*sym
)
14205 gfc_symbol
* super_type
;
14207 gfc_formal_arglist
*f
;
14210 if (sym
->attr
.unlimited_polymorphic
)
14213 super_type
= gfc_get_derived_super_type (sym
);
14216 if (super_type
&& sym
->attr
.coarray_comp
&& !super_type
->attr
.coarray_comp
)
14218 gfc_error ("As extending type %qs at %L has a coarray component, "
14219 "parent type %qs shall also have one", sym
->name
,
14220 &sym
->declared_at
, super_type
->name
);
14224 /* Ensure the extended type gets resolved before we do. */
14225 if (super_type
&& !resolve_fl_derived0 (super_type
))
14228 /* An ABSTRACT type must be extensible. */
14229 if (sym
->attr
.abstract
&& !gfc_type_is_extensible (sym
))
14231 gfc_error ("Non-extensible derived-type %qs at %L must not be ABSTRACT",
14232 sym
->name
, &sym
->declared_at
);
14236 c
= (sym
->attr
.is_class
) ? sym
->components
->ts
.u
.derived
->components
14240 for ( ; c
!= NULL
; c
= c
->next
)
14241 if (!resolve_component (c
, sym
))
14247 /* Now add the caf token field, where needed. */
14248 if (flag_coarray
!= GFC_FCOARRAY_NONE
14249 && !sym
->attr
.is_class
&& !sym
->attr
.vtype
)
14251 for (c
= sym
->components
; c
; c
= c
->next
)
14252 if (!c
->attr
.dimension
&& !c
->attr
.codimension
14253 && (c
->attr
.allocatable
|| c
->attr
.pointer
))
14255 char name
[GFC_MAX_SYMBOL_LEN
+9];
14256 gfc_component
*token
;
14257 sprintf (name
, "_caf_%s", c
->name
);
14258 token
= gfc_find_component (sym
, name
, true, true, NULL
);
14261 if (!gfc_add_component (sym
, name
, &token
))
14263 token
->ts
.type
= BT_VOID
;
14264 token
->ts
.kind
= gfc_default_integer_kind
;
14265 token
->attr
.access
= ACCESS_PRIVATE
;
14266 token
->attr
.artificial
= 1;
14267 token
->attr
.caf_token
= 1;
14272 check_defined_assignments (sym
);
14274 if (!sym
->attr
.defined_assign_comp
&& super_type
)
14275 sym
->attr
.defined_assign_comp
14276 = super_type
->attr
.defined_assign_comp
;
14278 /* If this is a non-ABSTRACT type extending an ABSTRACT one, ensure that
14279 all DEFERRED bindings are overridden. */
14280 if (super_type
&& super_type
->attr
.abstract
&& !sym
->attr
.abstract
14281 && !sym
->attr
.is_class
14282 && !ensure_not_abstract (sym
, super_type
))
14285 /* Check that there is a component for every PDT parameter. */
14286 if (sym
->attr
.pdt_template
)
14288 for (f
= sym
->formal
; f
; f
= f
->next
)
14292 c
= gfc_find_component (sym
, f
->sym
->name
, true, true, NULL
);
14295 gfc_error ("Parameterized type %qs does not have a component "
14296 "corresponding to parameter %qs at %L", sym
->name
,
14297 f
->sym
->name
, &sym
->declared_at
);
14303 /* Add derived type to the derived type list. */
14304 add_dt_to_dt_list (sym
);
14310 /* The following procedure does the full resolution of a derived type,
14311 including resolution of all type-bound procedures (if present). In contrast
14312 to 'resolve_fl_derived0' this can only be done after the module has been
14313 parsed completely. */
14316 resolve_fl_derived (gfc_symbol
*sym
)
14318 gfc_symbol
*gen_dt
= NULL
;
14320 if (sym
->attr
.unlimited_polymorphic
)
14323 if (!sym
->attr
.is_class
)
14324 gfc_find_symbol (sym
->name
, sym
->ns
, 0, &gen_dt
);
14325 if (gen_dt
&& gen_dt
->generic
&& gen_dt
->generic
->next
14326 && (!gen_dt
->generic
->sym
->attr
.use_assoc
14327 || gen_dt
->generic
->sym
->module
!= gen_dt
->generic
->next
->sym
->module
)
14328 && !gfc_notify_std (GFC_STD_F2003
, "Generic name %qs of function "
14329 "%qs at %L being the same name as derived "
14330 "type at %L", sym
->name
,
14331 gen_dt
->generic
->sym
== sym
14332 ? gen_dt
->generic
->next
->sym
->name
14333 : gen_dt
->generic
->sym
->name
,
14334 gen_dt
->generic
->sym
== sym
14335 ? &gen_dt
->generic
->next
->sym
->declared_at
14336 : &gen_dt
->generic
->sym
->declared_at
,
14337 &sym
->declared_at
))
14340 if (sym
->components
== NULL
&& !sym
->attr
.zero_comp
&& !sym
->attr
.use_assoc
)
14342 gfc_error ("Derived type %qs at %L has not been declared",
14343 sym
->name
, &sym
->declared_at
);
14347 /* Resolve the finalizer procedures. */
14348 if (!gfc_resolve_finalizers (sym
, NULL
))
14351 if (sym
->attr
.is_class
&& sym
->ts
.u
.derived
== NULL
)
14353 /* Fix up incomplete CLASS symbols. */
14354 gfc_component
*data
= gfc_find_component (sym
, "_data", true, true, NULL
);
14355 gfc_component
*vptr
= gfc_find_component (sym
, "_vptr", true, true, NULL
);
14357 /* Nothing more to do for unlimited polymorphic entities. */
14358 if (data
->ts
.u
.derived
->attr
.unlimited_polymorphic
)
14360 else if (vptr
->ts
.u
.derived
== NULL
)
14362 gfc_symbol
*vtab
= gfc_find_derived_vtab (data
->ts
.u
.derived
);
14364 vptr
->ts
.u
.derived
= vtab
->ts
.u
.derived
;
14365 if (!resolve_fl_derived0 (vptr
->ts
.u
.derived
))
14370 if (!resolve_fl_derived0 (sym
))
14373 /* Resolve the type-bound procedures. */
14374 if (!resolve_typebound_procedures (sym
))
14377 /* Generate module vtables subject to their accessibility and their not
14378 being vtables or pdt templates. If this is not done class declarations
14379 in external procedures wind up with their own version and so SELECT TYPE
14380 fails because the vptrs do not have the same address. */
14381 if (gfc_option
.allow_std
& GFC_STD_F2003
14382 && sym
->ns
->proc_name
14383 && sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
14384 && sym
->attr
.access
!= ACCESS_PRIVATE
14385 && !(sym
->attr
.use_assoc
|| sym
->attr
.vtype
|| sym
->attr
.pdt_template
))
14387 gfc_symbol
*vtab
= gfc_find_derived_vtab (sym
);
14388 gfc_set_sym_referenced (vtab
);
14396 resolve_fl_namelist (gfc_symbol
*sym
)
14401 for (nl
= sym
->namelist
; nl
; nl
= nl
->next
)
14403 /* Check again, the check in match only works if NAMELIST comes
14405 if (nl
->sym
->as
&& nl
->sym
->as
->type
== AS_ASSUMED_SIZE
)
14407 gfc_error ("Assumed size array %qs in namelist %qs at %L is not "
14408 "allowed", nl
->sym
->name
, sym
->name
, &sym
->declared_at
);
14412 if (nl
->sym
->as
&& nl
->sym
->as
->type
== AS_ASSUMED_SHAPE
14413 && !gfc_notify_std (GFC_STD_F2003
, "NAMELIST array object %qs "
14414 "with assumed shape in namelist %qs at %L",
14415 nl
->sym
->name
, sym
->name
, &sym
->declared_at
))
14418 if (is_non_constant_shape_array (nl
->sym
)
14419 && !gfc_notify_std (GFC_STD_F2003
, "NAMELIST array object %qs "
14420 "with nonconstant shape in namelist %qs at %L",
14421 nl
->sym
->name
, sym
->name
, &sym
->declared_at
))
14424 if (nl
->sym
->ts
.type
== BT_CHARACTER
14425 && (nl
->sym
->ts
.u
.cl
->length
== NULL
14426 || !gfc_is_constant_expr (nl
->sym
->ts
.u
.cl
->length
))
14427 && !gfc_notify_std (GFC_STD_F2003
, "NAMELIST object %qs with "
14428 "nonconstant character length in "
14429 "namelist %qs at %L", nl
->sym
->name
,
14430 sym
->name
, &sym
->declared_at
))
14435 /* Reject PRIVATE objects in a PUBLIC namelist. */
14436 if (gfc_check_symbol_access (sym
))
14438 for (nl
= sym
->namelist
; nl
; nl
= nl
->next
)
14440 if (!nl
->sym
->attr
.use_assoc
14441 && !is_sym_host_assoc (nl
->sym
, sym
->ns
)
14442 && !gfc_check_symbol_access (nl
->sym
))
14444 gfc_error ("NAMELIST object %qs was declared PRIVATE and "
14445 "cannot be member of PUBLIC namelist %qs at %L",
14446 nl
->sym
->name
, sym
->name
, &sym
->declared_at
);
14450 if (nl
->sym
->ts
.type
== BT_DERIVED
14451 && (nl
->sym
->ts
.u
.derived
->attr
.alloc_comp
14452 || nl
->sym
->ts
.u
.derived
->attr
.pointer_comp
))
14454 if (!gfc_notify_std (GFC_STD_F2003
, "NAMELIST object %qs in "
14455 "namelist %qs at %L with ALLOCATABLE "
14456 "or POINTER components", nl
->sym
->name
,
14457 sym
->name
, &sym
->declared_at
))
14462 /* Types with private components that came here by USE-association. */
14463 if (nl
->sym
->ts
.type
== BT_DERIVED
14464 && derived_inaccessible (nl
->sym
->ts
.u
.derived
))
14466 gfc_error ("NAMELIST object %qs has use-associated PRIVATE "
14467 "components and cannot be member of namelist %qs at %L",
14468 nl
->sym
->name
, sym
->name
, &sym
->declared_at
);
14472 /* Types with private components that are defined in the same module. */
14473 if (nl
->sym
->ts
.type
== BT_DERIVED
14474 && !is_sym_host_assoc (nl
->sym
->ts
.u
.derived
, sym
->ns
)
14475 && nl
->sym
->ts
.u
.derived
->attr
.private_comp
)
14477 gfc_error ("NAMELIST object %qs has PRIVATE components and "
14478 "cannot be a member of PUBLIC namelist %qs at %L",
14479 nl
->sym
->name
, sym
->name
, &sym
->declared_at
);
14486 /* 14.1.2 A module or internal procedure represent local entities
14487 of the same type as a namelist member and so are not allowed. */
14488 for (nl
= sym
->namelist
; nl
; nl
= nl
->next
)
14490 if (nl
->sym
->ts
.kind
!= 0 && nl
->sym
->attr
.flavor
== FL_VARIABLE
)
14493 if (nl
->sym
->attr
.function
&& nl
->sym
== nl
->sym
->result
)
14494 if ((nl
->sym
== sym
->ns
->proc_name
)
14496 (sym
->ns
->parent
&& nl
->sym
== sym
->ns
->parent
->proc_name
))
14501 gfc_find_symbol (nl
->sym
->name
, sym
->ns
, 1, &nlsym
);
14502 if (nlsym
&& nlsym
->attr
.flavor
== FL_PROCEDURE
)
14504 gfc_error ("PROCEDURE attribute conflicts with NAMELIST "
14505 "attribute in %qs at %L", nlsym
->name
,
14506 &sym
->declared_at
);
14513 for (nl
= sym
->namelist
; nl
; nl
= nl
->next
)
14514 nl
->sym
->attr
.asynchronous
= 1;
14521 resolve_fl_parameter (gfc_symbol
*sym
)
14523 /* A parameter array's shape needs to be constant. */
14524 if (sym
->as
!= NULL
14525 && (sym
->as
->type
== AS_DEFERRED
14526 || is_non_constant_shape_array (sym
)))
14528 gfc_error ("Parameter array %qs at %L cannot be automatic "
14529 "or of deferred shape", sym
->name
, &sym
->declared_at
);
14533 /* Constraints on deferred type parameter. */
14534 if (!deferred_requirements (sym
))
14537 /* Make sure a parameter that has been implicitly typed still
14538 matches the implicit type, since PARAMETER statements can precede
14539 IMPLICIT statements. */
14540 if (sym
->attr
.implicit_type
14541 && !gfc_compare_types (&sym
->ts
, gfc_get_default_type (sym
->name
,
14544 gfc_error ("Implicitly typed PARAMETER %qs at %L doesn't match a "
14545 "later IMPLICIT type", sym
->name
, &sym
->declared_at
);
14549 /* Make sure the types of derived parameters are consistent. This
14550 type checking is deferred until resolution because the type may
14551 refer to a derived type from the host. */
14552 if (sym
->ts
.type
== BT_DERIVED
14553 && !gfc_compare_types (&sym
->ts
, &sym
->value
->ts
))
14555 gfc_error ("Incompatible derived type in PARAMETER at %L",
14556 &sym
->value
->where
);
14560 /* F03:C509,C514. */
14561 if (sym
->ts
.type
== BT_CLASS
)
14563 gfc_error ("CLASS variable %qs at %L cannot have the PARAMETER attribute",
14564 sym
->name
, &sym
->declared_at
);
14572 /* Called by resolve_symbol to check PDTs. */
14575 resolve_pdt (gfc_symbol
* sym
)
14577 gfc_symbol
*derived
= NULL
;
14578 gfc_actual_arglist
*param
;
14580 bool const_len_exprs
= true;
14581 bool assumed_len_exprs
= false;
14582 symbol_attribute
*attr
;
14584 if (sym
->ts
.type
== BT_DERIVED
)
14586 derived
= sym
->ts
.u
.derived
;
14587 attr
= &(sym
->attr
);
14589 else if (sym
->ts
.type
== BT_CLASS
)
14591 derived
= CLASS_DATA (sym
)->ts
.u
.derived
;
14592 attr
= &(CLASS_DATA (sym
)->attr
);
14595 gcc_unreachable ();
14597 gcc_assert (derived
->attr
.pdt_type
);
14599 for (param
= sym
->param_list
; param
; param
= param
->next
)
14601 c
= gfc_find_component (derived
, param
->name
, false, true, NULL
);
14603 if (c
->attr
.pdt_kind
)
14606 if (param
->expr
&& !gfc_is_constant_expr (param
->expr
)
14607 && c
->attr
.pdt_len
)
14608 const_len_exprs
= false;
14609 else if (param
->spec_type
== SPEC_ASSUMED
)
14610 assumed_len_exprs
= true;
14612 if (param
->spec_type
== SPEC_DEFERRED
14613 && !attr
->allocatable
&& !attr
->pointer
)
14614 gfc_error ("The object %qs at %L has a deferred LEN "
14615 "parameter %qs and is neither allocatable "
14616 "nor a pointer", sym
->name
, &sym
->declared_at
,
14621 if (!const_len_exprs
14622 && (sym
->ns
->proc_name
->attr
.is_main_program
14623 || sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
14624 || sym
->attr
.save
!= SAVE_NONE
))
14625 gfc_error ("The AUTOMATIC object %qs at %L must not have the "
14626 "SAVE attribute or be a variable declared in the "
14627 "main program, a module or a submodule(F08/C513)",
14628 sym
->name
, &sym
->declared_at
);
14630 if (assumed_len_exprs
&& !(sym
->attr
.dummy
14631 || sym
->attr
.select_type_temporary
|| sym
->attr
.associate_var
))
14632 gfc_error ("The object %qs at %L with ASSUMED type parameters "
14633 "must be a dummy or a SELECT TYPE selector(F08/4.2)",
14634 sym
->name
, &sym
->declared_at
);
14638 /* Do anything necessary to resolve a symbol. Right now, we just
14639 assume that an otherwise unknown symbol is a variable. This sort
14640 of thing commonly happens for symbols in module. */
14643 resolve_symbol (gfc_symbol
*sym
)
14645 int check_constant
, mp_flag
;
14646 gfc_symtree
*symtree
;
14647 gfc_symtree
*this_symtree
;
14650 symbol_attribute class_attr
;
14651 gfc_array_spec
*as
;
14652 bool saved_specification_expr
;
14658 /* No symbol will ever have union type; only components can be unions.
14659 Union type declaration symbols have type BT_UNKNOWN but flavor FL_UNION
14660 (just like derived type declaration symbols have flavor FL_DERIVED). */
14661 gcc_assert (sym
->ts
.type
!= BT_UNION
);
14663 /* Coarrayed polymorphic objects with allocatable or pointer components are
14664 yet unsupported for -fcoarray=lib. */
14665 if (flag_coarray
== GFC_FCOARRAY_LIB
&& sym
->ts
.type
== BT_CLASS
14666 && sym
->ts
.u
.derived
&& CLASS_DATA (sym
)
14667 && CLASS_DATA (sym
)->attr
.codimension
14668 && (CLASS_DATA (sym
)->ts
.u
.derived
->attr
.alloc_comp
14669 || CLASS_DATA (sym
)->ts
.u
.derived
->attr
.pointer_comp
))
14671 gfc_error ("Sorry, allocatable/pointer components in polymorphic (CLASS) "
14672 "type coarrays at %L are unsupported", &sym
->declared_at
);
14676 if (sym
->attr
.artificial
)
14679 if (sym
->attr
.unlimited_polymorphic
)
14682 if (sym
->attr
.flavor
== FL_UNKNOWN
14683 || (sym
->attr
.flavor
== FL_PROCEDURE
&& !sym
->attr
.intrinsic
14684 && !sym
->attr
.generic
&& !sym
->attr
.external
14685 && sym
->attr
.if_source
== IFSRC_UNKNOWN
14686 && sym
->ts
.type
== BT_UNKNOWN
))
14689 /* If we find that a flavorless symbol is an interface in one of the
14690 parent namespaces, find its symtree in this namespace, free the
14691 symbol and set the symtree to point to the interface symbol. */
14692 for (ns
= gfc_current_ns
->parent
; ns
; ns
= ns
->parent
)
14694 symtree
= gfc_find_symtree (ns
->sym_root
, sym
->name
);
14695 if (symtree
&& (symtree
->n
.sym
->generic
||
14696 (symtree
->n
.sym
->attr
.flavor
== FL_PROCEDURE
14697 && sym
->ns
->construct_entities
)))
14699 this_symtree
= gfc_find_symtree (gfc_current_ns
->sym_root
,
14701 if (this_symtree
->n
.sym
== sym
)
14703 symtree
->n
.sym
->refs
++;
14704 gfc_release_symbol (sym
);
14705 this_symtree
->n
.sym
= symtree
->n
.sym
;
14711 /* Otherwise give it a flavor according to such attributes as
14713 if (sym
->attr
.flavor
== FL_UNKNOWN
&& sym
->attr
.external
== 0
14714 && sym
->attr
.intrinsic
== 0)
14715 sym
->attr
.flavor
= FL_VARIABLE
;
14716 else if (sym
->attr
.flavor
== FL_UNKNOWN
)
14718 sym
->attr
.flavor
= FL_PROCEDURE
;
14719 if (sym
->attr
.dimension
)
14720 sym
->attr
.function
= 1;
14724 if (sym
->attr
.external
&& sym
->ts
.type
!= BT_UNKNOWN
&& !sym
->attr
.function
)
14725 gfc_add_function (&sym
->attr
, sym
->name
, &sym
->declared_at
);
14727 if (sym
->attr
.procedure
&& sym
->attr
.if_source
!= IFSRC_DECL
14728 && !resolve_procedure_interface (sym
))
14731 if (sym
->attr
.is_protected
&& !sym
->attr
.proc_pointer
14732 && (sym
->attr
.procedure
|| sym
->attr
.external
))
14734 if (sym
->attr
.external
)
14735 gfc_error ("PROTECTED attribute conflicts with EXTERNAL attribute "
14736 "at %L", &sym
->declared_at
);
14738 gfc_error ("PROCEDURE attribute conflicts with PROTECTED attribute "
14739 "at %L", &sym
->declared_at
);
14744 if (sym
->attr
.flavor
== FL_DERIVED
&& !resolve_fl_derived (sym
))
14747 else if ((sym
->attr
.flavor
== FL_STRUCT
|| sym
->attr
.flavor
== FL_UNION
)
14748 && !resolve_fl_struct (sym
))
14751 /* Symbols that are module procedures with results (functions) have
14752 the types and array specification copied for type checking in
14753 procedures that call them, as well as for saving to a module
14754 file. These symbols can't stand the scrutiny that their results
14756 mp_flag
= (sym
->result
!= NULL
&& sym
->result
!= sym
);
14758 /* Make sure that the intrinsic is consistent with its internal
14759 representation. This needs to be done before assigning a default
14760 type to avoid spurious warnings. */
14761 if (sym
->attr
.flavor
!= FL_MODULE
&& sym
->attr
.intrinsic
14762 && !gfc_resolve_intrinsic (sym
, &sym
->declared_at
))
14765 /* Resolve associate names. */
14767 resolve_assoc_var (sym
, true);
14769 /* Assign default type to symbols that need one and don't have one. */
14770 if (sym
->ts
.type
== BT_UNKNOWN
)
14772 if (sym
->attr
.flavor
== FL_VARIABLE
|| sym
->attr
.flavor
== FL_PARAMETER
)
14774 gfc_set_default_type (sym
, 1, NULL
);
14777 if (sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.external
14778 && !sym
->attr
.function
&& !sym
->attr
.subroutine
14779 && gfc_get_default_type (sym
->name
, sym
->ns
)->type
== BT_UNKNOWN
)
14780 gfc_add_subroutine (&sym
->attr
, sym
->name
, &sym
->declared_at
);
14782 if (sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.function
)
14784 /* The specific case of an external procedure should emit an error
14785 in the case that there is no implicit type. */
14788 if (!sym
->attr
.mixed_entry_master
)
14789 gfc_set_default_type (sym
, sym
->attr
.external
, NULL
);
14793 /* Result may be in another namespace. */
14794 resolve_symbol (sym
->result
);
14796 if (!sym
->result
->attr
.proc_pointer
)
14798 sym
->ts
= sym
->result
->ts
;
14799 sym
->as
= gfc_copy_array_spec (sym
->result
->as
);
14800 sym
->attr
.dimension
= sym
->result
->attr
.dimension
;
14801 sym
->attr
.pointer
= sym
->result
->attr
.pointer
;
14802 sym
->attr
.allocatable
= sym
->result
->attr
.allocatable
;
14803 sym
->attr
.contiguous
= sym
->result
->attr
.contiguous
;
14808 else if (mp_flag
&& sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.function
)
14810 bool saved_specification_expr
= specification_expr
;
14811 specification_expr
= true;
14812 gfc_resolve_array_spec (sym
->result
->as
, false);
14813 specification_expr
= saved_specification_expr
;
14816 if (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
)
14818 as
= CLASS_DATA (sym
)->as
;
14819 class_attr
= CLASS_DATA (sym
)->attr
;
14820 class_attr
.pointer
= class_attr
.class_pointer
;
14824 class_attr
= sym
->attr
;
14829 if (sym
->attr
.contiguous
14830 && (!class_attr
.dimension
14831 || (as
->type
!= AS_ASSUMED_SHAPE
&& as
->type
!= AS_ASSUMED_RANK
14832 && !class_attr
.pointer
)))
14834 gfc_error ("%qs at %L has the CONTIGUOUS attribute but is not an "
14835 "array pointer or an assumed-shape or assumed-rank array",
14836 sym
->name
, &sym
->declared_at
);
14840 /* Assumed size arrays and assumed shape arrays must be dummy
14841 arguments. Array-spec's of implied-shape should have been resolved to
14842 AS_EXPLICIT already. */
14846 /* If AS_IMPLIED_SHAPE makes it to here, it must be a bad
14847 specification expression. */
14848 if (as
->type
== AS_IMPLIED_SHAPE
)
14851 for (i
=0; i
<as
->rank
; i
++)
14853 if (as
->lower
[i
] != NULL
&& as
->upper
[i
] == NULL
)
14855 gfc_error ("Bad specification for assumed size array at %L",
14856 &as
->lower
[i
]->where
);
14863 if (((as
->type
== AS_ASSUMED_SIZE
&& !as
->cp_was_assumed
)
14864 || as
->type
== AS_ASSUMED_SHAPE
)
14865 && !sym
->attr
.dummy
&& !sym
->attr
.select_type_temporary
)
14867 if (as
->type
== AS_ASSUMED_SIZE
)
14868 gfc_error ("Assumed size array at %L must be a dummy argument",
14869 &sym
->declared_at
);
14871 gfc_error ("Assumed shape array at %L must be a dummy argument",
14872 &sym
->declared_at
);
14875 /* TS 29113, C535a. */
14876 if (as
->type
== AS_ASSUMED_RANK
&& !sym
->attr
.dummy
14877 && !sym
->attr
.select_type_temporary
)
14879 gfc_error ("Assumed-rank array at %L must be a dummy argument",
14880 &sym
->declared_at
);
14883 if (as
->type
== AS_ASSUMED_RANK
14884 && (sym
->attr
.codimension
|| sym
->attr
.value
))
14886 gfc_error ("Assumed-rank array at %L may not have the VALUE or "
14887 "CODIMENSION attribute", &sym
->declared_at
);
14892 /* Make sure symbols with known intent or optional are really dummy
14893 variable. Because of ENTRY statement, this has to be deferred
14894 until resolution time. */
14896 if (!sym
->attr
.dummy
14897 && (sym
->attr
.optional
|| sym
->attr
.intent
!= INTENT_UNKNOWN
))
14899 gfc_error ("Symbol at %L is not a DUMMY variable", &sym
->declared_at
);
14903 if (sym
->attr
.value
&& !sym
->attr
.dummy
)
14905 gfc_error ("%qs at %L cannot have the VALUE attribute because "
14906 "it is not a dummy argument", sym
->name
, &sym
->declared_at
);
14910 if (sym
->attr
.value
&& sym
->ts
.type
== BT_CHARACTER
)
14912 gfc_charlen
*cl
= sym
->ts
.u
.cl
;
14913 if (!cl
|| !cl
->length
|| cl
->length
->expr_type
!= EXPR_CONSTANT
)
14915 gfc_error ("Character dummy variable %qs at %L with VALUE "
14916 "attribute must have constant length",
14917 sym
->name
, &sym
->declared_at
);
14921 if (sym
->ts
.is_c_interop
14922 && mpz_cmp_si (cl
->length
->value
.integer
, 1) != 0)
14924 gfc_error ("C interoperable character dummy variable %qs at %L "
14925 "with VALUE attribute must have length one",
14926 sym
->name
, &sym
->declared_at
);
14931 if (sym
->ts
.type
== BT_DERIVED
&& !sym
->attr
.is_iso_c
14932 && sym
->ts
.u
.derived
->attr
.generic
)
14934 sym
->ts
.u
.derived
= gfc_find_dt_in_generic (sym
->ts
.u
.derived
);
14935 if (!sym
->ts
.u
.derived
)
14937 gfc_error ("The derived type %qs at %L is of type %qs, "
14938 "which has not been defined", sym
->name
,
14939 &sym
->declared_at
, sym
->ts
.u
.derived
->name
);
14940 sym
->ts
.type
= BT_UNKNOWN
;
14945 /* Use the same constraints as TYPE(*), except for the type check
14946 and that only scalars and assumed-size arrays are permitted. */
14947 if (sym
->attr
.ext_attr
& (1 << EXT_ATTR_NO_ARG_CHECK
))
14949 if (!sym
->attr
.dummy
)
14951 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute shall be "
14952 "a dummy argument", sym
->name
, &sym
->declared_at
);
14956 if (sym
->ts
.type
!= BT_ASSUMED
&& sym
->ts
.type
!= BT_INTEGER
14957 && sym
->ts
.type
!= BT_REAL
&& sym
->ts
.type
!= BT_LOGICAL
14958 && sym
->ts
.type
!= BT_COMPLEX
)
14960 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute shall be "
14961 "of type TYPE(*) or of an numeric intrinsic type",
14962 sym
->name
, &sym
->declared_at
);
14966 if (sym
->attr
.allocatable
|| sym
->attr
.codimension
14967 || sym
->attr
.pointer
|| sym
->attr
.value
)
14969 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute may not "
14970 "have the ALLOCATABLE, CODIMENSION, POINTER or VALUE "
14971 "attribute", sym
->name
, &sym
->declared_at
);
14975 if (sym
->attr
.intent
== INTENT_OUT
)
14977 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute may not "
14978 "have the INTENT(OUT) attribute",
14979 sym
->name
, &sym
->declared_at
);
14982 if (sym
->attr
.dimension
&& sym
->as
->type
!= AS_ASSUMED_SIZE
)
14984 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute shall "
14985 "either be a scalar or an assumed-size array",
14986 sym
->name
, &sym
->declared_at
);
14990 /* Set the type to TYPE(*) and add a dimension(*) to ensure
14991 NO_ARG_CHECK is correctly handled in trans*.c, e.g. with
14993 sym
->ts
.type
= BT_ASSUMED
;
14994 sym
->as
= gfc_get_array_spec ();
14995 sym
->as
->type
= AS_ASSUMED_SIZE
;
14997 sym
->as
->lower
[0] = gfc_get_int_expr (gfc_default_integer_kind
, NULL
, 1);
14999 else if (sym
->ts
.type
== BT_ASSUMED
)
15001 /* TS 29113, C407a. */
15002 if (!sym
->attr
.dummy
)
15004 gfc_error ("Assumed type of variable %s at %L is only permitted "
15005 "for dummy variables", sym
->name
, &sym
->declared_at
);
15008 if (sym
->attr
.allocatable
|| sym
->attr
.codimension
15009 || sym
->attr
.pointer
|| sym
->attr
.value
)
15011 gfc_error ("Assumed-type variable %s at %L may not have the "
15012 "ALLOCATABLE, CODIMENSION, POINTER or VALUE attribute",
15013 sym
->name
, &sym
->declared_at
);
15016 if (sym
->attr
.intent
== INTENT_OUT
)
15018 gfc_error ("Assumed-type variable %s at %L may not have the "
15019 "INTENT(OUT) attribute",
15020 sym
->name
, &sym
->declared_at
);
15023 if (sym
->attr
.dimension
&& sym
->as
->type
== AS_EXPLICIT
)
15025 gfc_error ("Assumed-type variable %s at %L shall not be an "
15026 "explicit-shape array", sym
->name
, &sym
->declared_at
);
15031 /* If the symbol is marked as bind(c), that it is declared at module level
15032 scope and verify its type and kind. Do not do the latter for symbols
15033 that are implicitly typed because that is handled in
15034 gfc_set_default_type. Handle dummy arguments and procedure definitions
15035 separately. Also, anything that is use associated is not handled here
15036 but instead is handled in the module it is declared in. Finally, derived
15037 type definitions are allowed to be BIND(C) since that only implies that
15038 they're interoperable, and they are checked fully for interoperability
15039 when a variable is declared of that type. */
15040 if (sym
->attr
.is_bind_c
&& sym
->attr
.use_assoc
== 0
15041 && sym
->attr
.dummy
== 0 && sym
->attr
.flavor
!= FL_PROCEDURE
15042 && sym
->attr
.flavor
!= FL_DERIVED
)
15046 /* First, make sure the variable is declared at the
15047 module-level scope (J3/04-007, Section 15.3). */
15048 if (sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
&&
15049 sym
->attr
.in_common
== 0)
15051 gfc_error ("Variable %qs at %L cannot be BIND(C) because it "
15052 "is neither a COMMON block nor declared at the "
15053 "module level scope", sym
->name
, &(sym
->declared_at
));
15056 else if (sym
->ts
.type
== BT_CHARACTER
15057 && (sym
->ts
.u
.cl
== NULL
|| sym
->ts
.u
.cl
->length
== NULL
15058 || !gfc_is_constant_expr (sym
->ts
.u
.cl
->length
)
15059 || mpz_cmp_si (sym
->ts
.u
.cl
->length
->value
.integer
, 1) != 0))
15061 gfc_error ("BIND(C) Variable %qs at %L must have length one",
15062 sym
->name
, &sym
->declared_at
);
15065 else if (sym
->common_head
!= NULL
&& sym
->attr
.implicit_type
== 0)
15067 t
= verify_com_block_vars_c_interop (sym
->common_head
);
15069 else if (sym
->attr
.implicit_type
== 0)
15071 /* If type() declaration, we need to verify that the components
15072 of the given type are all C interoperable, etc. */
15073 if (sym
->ts
.type
== BT_DERIVED
&&
15074 sym
->ts
.u
.derived
->attr
.is_c_interop
!= 1)
15076 /* Make sure the user marked the derived type as BIND(C). If
15077 not, call the verify routine. This could print an error
15078 for the derived type more than once if multiple variables
15079 of that type are declared. */
15080 if (sym
->ts
.u
.derived
->attr
.is_bind_c
!= 1)
15081 verify_bind_c_derived_type (sym
->ts
.u
.derived
);
15085 /* Verify the variable itself as C interoperable if it
15086 is BIND(C). It is not possible for this to succeed if
15087 the verify_bind_c_derived_type failed, so don't have to handle
15088 any error returned by verify_bind_c_derived_type. */
15089 t
= verify_bind_c_sym (sym
, &(sym
->ts
), sym
->attr
.in_common
,
15090 sym
->common_block
);
15095 /* clear the is_bind_c flag to prevent reporting errors more than
15096 once if something failed. */
15097 sym
->attr
.is_bind_c
= 0;
15102 /* If a derived type symbol has reached this point, without its
15103 type being declared, we have an error. Notice that most
15104 conditions that produce undefined derived types have already
15105 been dealt with. However, the likes of:
15106 implicit type(t) (t) ..... call foo (t) will get us here if
15107 the type is not declared in the scope of the implicit
15108 statement. Change the type to BT_UNKNOWN, both because it is so
15109 and to prevent an ICE. */
15110 if (sym
->ts
.type
== BT_DERIVED
&& !sym
->attr
.is_iso_c
15111 && sym
->ts
.u
.derived
->components
== NULL
15112 && !sym
->ts
.u
.derived
->attr
.zero_comp
)
15114 gfc_error ("The derived type %qs at %L is of type %qs, "
15115 "which has not been defined", sym
->name
,
15116 &sym
->declared_at
, sym
->ts
.u
.derived
->name
);
15117 sym
->ts
.type
= BT_UNKNOWN
;
15121 /* Make sure that the derived type has been resolved and that the
15122 derived type is visible in the symbol's namespace, if it is a
15123 module function and is not PRIVATE. */
15124 if (sym
->ts
.type
== BT_DERIVED
15125 && sym
->ts
.u
.derived
->attr
.use_assoc
15126 && sym
->ns
->proc_name
15127 && sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
15128 && !resolve_fl_derived (sym
->ts
.u
.derived
))
15131 /* Unless the derived-type declaration is use associated, Fortran 95
15132 does not allow public entries of private derived types.
15133 See 4.4.1 (F95) and 4.5.1.1 (F2003); and related interpretation
15134 161 in 95-006r3. */
15135 if (sym
->ts
.type
== BT_DERIVED
15136 && sym
->ns
->proc_name
&& sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
15137 && !sym
->ts
.u
.derived
->attr
.use_assoc
15138 && gfc_check_symbol_access (sym
)
15139 && !gfc_check_symbol_access (sym
->ts
.u
.derived
)
15140 && !gfc_notify_std (GFC_STD_F2003
, "PUBLIC %s %qs at %L of PRIVATE "
15141 "derived type %qs",
15142 (sym
->attr
.flavor
== FL_PARAMETER
)
15143 ? "parameter" : "variable",
15144 sym
->name
, &sym
->declared_at
,
15145 sym
->ts
.u
.derived
->name
))
15148 /* F2008, C1302. */
15149 if (sym
->ts
.type
== BT_DERIVED
15150 && ((sym
->ts
.u
.derived
->from_intmod
== INTMOD_ISO_FORTRAN_ENV
15151 && sym
->ts
.u
.derived
->intmod_sym_id
== ISOFORTRAN_LOCK_TYPE
)
15152 || sym
->ts
.u
.derived
->attr
.lock_comp
)
15153 && !sym
->attr
.codimension
&& !sym
->ts
.u
.derived
->attr
.coarray_comp
)
15155 gfc_error ("Variable %s at %L of type LOCK_TYPE or with subcomponent of "
15156 "type LOCK_TYPE must be a coarray", sym
->name
,
15157 &sym
->declared_at
);
15161 /* TS18508, C702/C703. */
15162 if (sym
->ts
.type
== BT_DERIVED
15163 && ((sym
->ts
.u
.derived
->from_intmod
== INTMOD_ISO_FORTRAN_ENV
15164 && sym
->ts
.u
.derived
->intmod_sym_id
== ISOFORTRAN_EVENT_TYPE
)
15165 || sym
->ts
.u
.derived
->attr
.event_comp
)
15166 && !sym
->attr
.codimension
&& !sym
->ts
.u
.derived
->attr
.coarray_comp
)
15168 gfc_error ("Variable %s at %L of type EVENT_TYPE or with subcomponent of "
15169 "type EVENT_TYPE must be a coarray", sym
->name
,
15170 &sym
->declared_at
);
15174 /* An assumed-size array with INTENT(OUT) shall not be of a type for which
15175 default initialization is defined (5.1.2.4.4). */
15176 if (sym
->ts
.type
== BT_DERIVED
15178 && sym
->attr
.intent
== INTENT_OUT
15180 && sym
->as
->type
== AS_ASSUMED_SIZE
)
15182 for (c
= sym
->ts
.u
.derived
->components
; c
; c
= c
->next
)
15184 if (c
->initializer
)
15186 gfc_error ("The INTENT(OUT) dummy argument %qs at %L is "
15187 "ASSUMED SIZE and so cannot have a default initializer",
15188 sym
->name
, &sym
->declared_at
);
15195 if (sym
->ts
.type
== BT_DERIVED
&& sym
->attr
.dummy
15196 && sym
->attr
.intent
== INTENT_OUT
&& sym
->attr
.lock_comp
)
15198 gfc_error ("Dummy argument %qs at %L of LOCK_TYPE shall not be "
15199 "INTENT(OUT)", sym
->name
, &sym
->declared_at
);
15204 if (sym
->ts
.type
== BT_DERIVED
&& sym
->attr
.dummy
15205 && sym
->attr
.intent
== INTENT_OUT
&& sym
->attr
.event_comp
)
15207 gfc_error ("Dummy argument %qs at %L of EVENT_TYPE shall not be "
15208 "INTENT(OUT)", sym
->name
, &sym
->declared_at
);
15213 if ((((sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
->attr
.coarray_comp
)
15214 || (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
15215 && CLASS_DATA (sym
)->attr
.coarray_comp
))
15216 || class_attr
.codimension
)
15217 && (sym
->attr
.result
|| sym
->result
== sym
))
15219 gfc_error ("Function result %qs at %L shall not be a coarray or have "
15220 "a coarray component", sym
->name
, &sym
->declared_at
);
15225 if (sym
->attr
.codimension
&& sym
->ts
.type
== BT_DERIVED
15226 && sym
->ts
.u
.derived
->ts
.is_iso_c
)
15228 gfc_error ("Variable %qs at %L of TYPE(C_PTR) or TYPE(C_FUNPTR) "
15229 "shall not be a coarray", sym
->name
, &sym
->declared_at
);
15234 if (((sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
->attr
.coarray_comp
)
15235 || (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
15236 && CLASS_DATA (sym
)->attr
.coarray_comp
))
15237 && (class_attr
.codimension
|| class_attr
.pointer
|| class_attr
.dimension
15238 || class_attr
.allocatable
))
15240 gfc_error ("Variable %qs at %L with coarray component shall be a "
15241 "nonpointer, nonallocatable scalar, which is not a coarray",
15242 sym
->name
, &sym
->declared_at
);
15246 /* F2008, C526. The function-result case was handled above. */
15247 if (class_attr
.codimension
15248 && !(class_attr
.allocatable
|| sym
->attr
.dummy
|| sym
->attr
.save
15249 || sym
->attr
.select_type_temporary
15250 || sym
->attr
.associate_var
15251 || (sym
->ns
->save_all
&& !sym
->attr
.automatic
)
15252 || sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
15253 || sym
->ns
->proc_name
->attr
.is_main_program
15254 || sym
->attr
.function
|| sym
->attr
.result
|| sym
->attr
.use_assoc
))
15256 gfc_error ("Variable %qs at %L is a coarray and is not ALLOCATABLE, SAVE "
15257 "nor a dummy argument", sym
->name
, &sym
->declared_at
);
15261 else if (class_attr
.codimension
&& !sym
->attr
.select_type_temporary
15262 && !class_attr
.allocatable
&& as
&& as
->cotype
== AS_DEFERRED
)
15264 gfc_error ("Coarray variable %qs at %L shall not have codimensions with "
15265 "deferred shape", sym
->name
, &sym
->declared_at
);
15268 else if (class_attr
.codimension
&& class_attr
.allocatable
&& as
15269 && (as
->cotype
!= AS_DEFERRED
|| as
->type
!= AS_DEFERRED
))
15271 gfc_error ("Allocatable coarray variable %qs at %L must have "
15272 "deferred shape", sym
->name
, &sym
->declared_at
);
15277 if ((((sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
->attr
.coarray_comp
)
15278 || (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
15279 && CLASS_DATA (sym
)->attr
.coarray_comp
))
15280 || (class_attr
.codimension
&& class_attr
.allocatable
))
15281 && sym
->attr
.dummy
&& sym
->attr
.intent
== INTENT_OUT
)
15283 gfc_error ("Variable %qs at %L is INTENT(OUT) and can thus not be an "
15284 "allocatable coarray or have coarray components",
15285 sym
->name
, &sym
->declared_at
);
15289 if (class_attr
.codimension
&& sym
->attr
.dummy
15290 && sym
->ns
->proc_name
&& sym
->ns
->proc_name
->attr
.is_bind_c
)
15292 gfc_error ("Coarray dummy variable %qs at %L not allowed in BIND(C) "
15293 "procedure %qs", sym
->name
, &sym
->declared_at
,
15294 sym
->ns
->proc_name
->name
);
15298 if (sym
->ts
.type
== BT_LOGICAL
15299 && ((sym
->attr
.function
&& sym
->attr
.is_bind_c
&& sym
->result
== sym
)
15300 || ((sym
->attr
.dummy
|| sym
->attr
.result
) && sym
->ns
->proc_name
15301 && sym
->ns
->proc_name
->attr
.is_bind_c
)))
15304 for (i
= 0; gfc_logical_kinds
[i
].kind
; i
++)
15305 if (gfc_logical_kinds
[i
].kind
== sym
->ts
.kind
)
15307 if (!gfc_logical_kinds
[i
].c_bool
&& sym
->attr
.dummy
15308 && !gfc_notify_std (GFC_STD_GNU
, "LOGICAL dummy argument %qs at "
15309 "%L with non-C_Bool kind in BIND(C) procedure "
15310 "%qs", sym
->name
, &sym
->declared_at
,
15311 sym
->ns
->proc_name
->name
))
15313 else if (!gfc_logical_kinds
[i
].c_bool
15314 && !gfc_notify_std (GFC_STD_GNU
, "LOGICAL result variable "
15315 "%qs at %L with non-C_Bool kind in "
15316 "BIND(C) procedure %qs", sym
->name
,
15318 sym
->attr
.function
? sym
->name
15319 : sym
->ns
->proc_name
->name
))
15323 switch (sym
->attr
.flavor
)
15326 if (!resolve_fl_variable (sym
, mp_flag
))
15331 if (sym
->formal
&& !sym
->formal_ns
)
15333 /* Check that none of the arguments are a namelist. */
15334 gfc_formal_arglist
*formal
= sym
->formal
;
15336 for (; formal
; formal
= formal
->next
)
15337 if (formal
->sym
&& formal
->sym
->attr
.flavor
== FL_NAMELIST
)
15339 gfc_error ("Namelist %qs cannot be an argument to "
15340 "subroutine or function at %L",
15341 formal
->sym
->name
, &sym
->declared_at
);
15346 if (!resolve_fl_procedure (sym
, mp_flag
))
15351 if (!resolve_fl_namelist (sym
))
15356 if (!resolve_fl_parameter (sym
))
15364 /* Resolve array specifier. Check as well some constraints
15365 on COMMON blocks. */
15367 check_constant
= sym
->attr
.in_common
&& !sym
->attr
.pointer
;
15369 /* Set the formal_arg_flag so that check_conflict will not throw
15370 an error for host associated variables in the specification
15371 expression for an array_valued function. */
15372 if ((sym
->attr
.function
|| sym
->attr
.result
) && sym
->as
)
15373 formal_arg_flag
= true;
15375 saved_specification_expr
= specification_expr
;
15376 specification_expr
= true;
15377 gfc_resolve_array_spec (sym
->as
, check_constant
);
15378 specification_expr
= saved_specification_expr
;
15380 formal_arg_flag
= false;
15382 /* Resolve formal namespaces. */
15383 if (sym
->formal_ns
&& sym
->formal_ns
!= gfc_current_ns
15384 && !sym
->attr
.contained
&& !sym
->attr
.intrinsic
)
15385 gfc_resolve (sym
->formal_ns
);
15387 /* Make sure the formal namespace is present. */
15388 if (sym
->formal
&& !sym
->formal_ns
)
15390 gfc_formal_arglist
*formal
= sym
->formal
;
15391 while (formal
&& !formal
->sym
)
15392 formal
= formal
->next
;
15396 sym
->formal_ns
= formal
->sym
->ns
;
15397 if (sym
->ns
!= formal
->sym
->ns
)
15398 sym
->formal_ns
->refs
++;
15402 /* Check threadprivate restrictions. */
15403 if (sym
->attr
.threadprivate
&& !sym
->attr
.save
15404 && !(sym
->ns
->save_all
&& !sym
->attr
.automatic
)
15405 && (!sym
->attr
.in_common
15406 && sym
->module
== NULL
15407 && (sym
->ns
->proc_name
== NULL
15408 || sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
)))
15409 gfc_error ("Threadprivate at %L isn't SAVEd", &sym
->declared_at
);
15411 /* Check omp declare target restrictions. */
15412 if (sym
->attr
.omp_declare_target
15413 && sym
->attr
.flavor
== FL_VARIABLE
15415 && !(sym
->ns
->save_all
&& !sym
->attr
.automatic
)
15416 && (!sym
->attr
.in_common
15417 && sym
->module
== NULL
15418 && (sym
->ns
->proc_name
== NULL
15419 || sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
)))
15420 gfc_error ("!$OMP DECLARE TARGET variable %qs at %L isn't SAVEd",
15421 sym
->name
, &sym
->declared_at
);
15423 /* If we have come this far we can apply default-initializers, as
15424 described in 14.7.5, to those variables that have not already
15425 been assigned one. */
15426 if (sym
->ts
.type
== BT_DERIVED
15428 && !sym
->attr
.allocatable
15429 && !sym
->attr
.alloc_comp
)
15431 symbol_attribute
*a
= &sym
->attr
;
15433 if ((!a
->save
&& !a
->dummy
&& !a
->pointer
15434 && !a
->in_common
&& !a
->use_assoc
15436 && !((a
->function
|| a
->result
)
15438 || sym
->ts
.u
.derived
->attr
.alloc_comp
15439 || sym
->ts
.u
.derived
->attr
.pointer_comp
))
15440 && !(a
->function
&& sym
!= sym
->result
))
15441 || (a
->dummy
&& a
->intent
== INTENT_OUT
&& !a
->pointer
))
15442 apply_default_init (sym
);
15443 else if (a
->function
&& sym
->result
&& a
->access
!= ACCESS_PRIVATE
15444 && (sym
->ts
.u
.derived
->attr
.alloc_comp
15445 || sym
->ts
.u
.derived
->attr
.pointer_comp
))
15446 /* Mark the result symbol to be referenced, when it has allocatable
15448 sym
->result
->attr
.referenced
= 1;
15451 if (sym
->ts
.type
== BT_CLASS
&& sym
->ns
== gfc_current_ns
15452 && sym
->attr
.dummy
&& sym
->attr
.intent
== INTENT_OUT
15453 && !CLASS_DATA (sym
)->attr
.class_pointer
15454 && !CLASS_DATA (sym
)->attr
.allocatable
)
15455 apply_default_init (sym
);
15457 /* If this symbol has a type-spec, check it. */
15458 if (sym
->attr
.flavor
== FL_VARIABLE
|| sym
->attr
.flavor
== FL_PARAMETER
15459 || (sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.function
))
15460 if (!resolve_typespec_used (&sym
->ts
, &sym
->declared_at
, sym
->name
))
15463 if (sym
->param_list
)
15468 /************* Resolve DATA statements *************/
15472 gfc_data_value
*vnode
;
15478 /* Advance the values structure to point to the next value in the data list. */
15481 next_data_value (void)
15483 while (mpz_cmp_ui (values
.left
, 0) == 0)
15486 if (values
.vnode
->next
== NULL
)
15489 values
.vnode
= values
.vnode
->next
;
15490 mpz_set (values
.left
, values
.vnode
->repeat
);
15498 check_data_variable (gfc_data_variable
*var
, locus
*where
)
15504 ar_type mark
= AR_UNKNOWN
;
15506 mpz_t section_index
[GFC_MAX_DIMENSIONS
];
15512 if (!gfc_resolve_expr (var
->expr
))
15516 mpz_init_set_si (offset
, 0);
15519 if (e
->expr_type
== EXPR_FUNCTION
&& e
->value
.function
.isym
15520 && e
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
)
15521 e
= e
->value
.function
.actual
->expr
;
15523 if (e
->expr_type
!= EXPR_VARIABLE
)
15525 gfc_error ("Expecting definable entity near %L", where
);
15529 sym
= e
->symtree
->n
.sym
;
15531 if (sym
->ns
->is_block_data
&& !sym
->attr
.in_common
)
15533 gfc_error ("BLOCK DATA element %qs at %L must be in COMMON",
15534 sym
->name
, &sym
->declared_at
);
15538 if (e
->ref
== NULL
&& sym
->as
)
15540 gfc_error ("DATA array %qs at %L must be specified in a previous"
15541 " declaration", sym
->name
, where
);
15545 has_pointer
= sym
->attr
.pointer
;
15547 if (gfc_is_coindexed (e
))
15549 gfc_error ("DATA element %qs at %L cannot have a coindex", sym
->name
,
15554 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
15556 if (ref
->type
== REF_COMPONENT
&& ref
->u
.c
.component
->attr
.pointer
)
15560 && ref
->type
== REF_ARRAY
15561 && ref
->u
.ar
.type
!= AR_FULL
)
15563 gfc_error ("DATA element %qs at %L is a pointer and so must "
15564 "be a full array", sym
->name
, where
);
15569 if (e
->rank
== 0 || has_pointer
)
15571 mpz_init_set_ui (size
, 1);
15578 /* Find the array section reference. */
15579 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
15581 if (ref
->type
!= REF_ARRAY
)
15583 if (ref
->u
.ar
.type
== AR_ELEMENT
)
15589 /* Set marks according to the reference pattern. */
15590 switch (ref
->u
.ar
.type
)
15598 /* Get the start position of array section. */
15599 gfc_get_section_index (ar
, section_index
, &offset
);
15604 gcc_unreachable ();
15607 if (!gfc_array_size (e
, &size
))
15609 gfc_error ("Nonconstant array section at %L in DATA statement",
15611 mpz_clear (offset
);
15618 while (mpz_cmp_ui (size
, 0) > 0)
15620 if (!next_data_value ())
15622 gfc_error ("DATA statement at %L has more variables than values",
15628 t
= gfc_check_assign (var
->expr
, values
.vnode
->expr
, 0);
15632 /* If we have more than one element left in the repeat count,
15633 and we have more than one element left in the target variable,
15634 then create a range assignment. */
15635 /* FIXME: Only done for full arrays for now, since array sections
15637 if (mark
== AR_FULL
&& ref
&& ref
->next
== NULL
15638 && mpz_cmp_ui (values
.left
, 1) > 0 && mpz_cmp_ui (size
, 1) > 0)
15642 if (mpz_cmp (size
, values
.left
) >= 0)
15644 mpz_init_set (range
, values
.left
);
15645 mpz_sub (size
, size
, values
.left
);
15646 mpz_set_ui (values
.left
, 0);
15650 mpz_init_set (range
, size
);
15651 mpz_sub (values
.left
, values
.left
, size
);
15652 mpz_set_ui (size
, 0);
15655 t
= gfc_assign_data_value (var
->expr
, values
.vnode
->expr
,
15658 mpz_add (offset
, offset
, range
);
15665 /* Assign initial value to symbol. */
15668 mpz_sub_ui (values
.left
, values
.left
, 1);
15669 mpz_sub_ui (size
, size
, 1);
15671 t
= gfc_assign_data_value (var
->expr
, values
.vnode
->expr
,
15676 if (mark
== AR_FULL
)
15677 mpz_add_ui (offset
, offset
, 1);
15679 /* Modify the array section indexes and recalculate the offset
15680 for next element. */
15681 else if (mark
== AR_SECTION
)
15682 gfc_advance_section (section_index
, ar
, &offset
);
15686 if (mark
== AR_SECTION
)
15688 for (i
= 0; i
< ar
->dimen
; i
++)
15689 mpz_clear (section_index
[i
]);
15693 mpz_clear (offset
);
15699 static bool traverse_data_var (gfc_data_variable
*, locus
*);
15701 /* Iterate over a list of elements in a DATA statement. */
15704 traverse_data_list (gfc_data_variable
*var
, locus
*where
)
15707 iterator_stack frame
;
15708 gfc_expr
*e
, *start
, *end
, *step
;
15709 bool retval
= true;
15711 mpz_init (frame
.value
);
15714 start
= gfc_copy_expr (var
->iter
.start
);
15715 end
= gfc_copy_expr (var
->iter
.end
);
15716 step
= gfc_copy_expr (var
->iter
.step
);
15718 if (!gfc_simplify_expr (start
, 1)
15719 || start
->expr_type
!= EXPR_CONSTANT
)
15721 gfc_error ("start of implied-do loop at %L could not be "
15722 "simplified to a constant value", &start
->where
);
15726 if (!gfc_simplify_expr (end
, 1)
15727 || end
->expr_type
!= EXPR_CONSTANT
)
15729 gfc_error ("end of implied-do loop at %L could not be "
15730 "simplified to a constant value", &start
->where
);
15734 if (!gfc_simplify_expr (step
, 1)
15735 || step
->expr_type
!= EXPR_CONSTANT
)
15737 gfc_error ("step of implied-do loop at %L could not be "
15738 "simplified to a constant value", &start
->where
);
15743 mpz_set (trip
, end
->value
.integer
);
15744 mpz_sub (trip
, trip
, start
->value
.integer
);
15745 mpz_add (trip
, trip
, step
->value
.integer
);
15747 mpz_div (trip
, trip
, step
->value
.integer
);
15749 mpz_set (frame
.value
, start
->value
.integer
);
15751 frame
.prev
= iter_stack
;
15752 frame
.variable
= var
->iter
.var
->symtree
;
15753 iter_stack
= &frame
;
15755 while (mpz_cmp_ui (trip
, 0) > 0)
15757 if (!traverse_data_var (var
->list
, where
))
15763 e
= gfc_copy_expr (var
->expr
);
15764 if (!gfc_simplify_expr (e
, 1))
15771 mpz_add (frame
.value
, frame
.value
, step
->value
.integer
);
15773 mpz_sub_ui (trip
, trip
, 1);
15777 mpz_clear (frame
.value
);
15780 gfc_free_expr (start
);
15781 gfc_free_expr (end
);
15782 gfc_free_expr (step
);
15784 iter_stack
= frame
.prev
;
15789 /* Type resolve variables in the variable list of a DATA statement. */
15792 traverse_data_var (gfc_data_variable
*var
, locus
*where
)
15796 for (; var
; var
= var
->next
)
15798 if (var
->expr
== NULL
)
15799 t
= traverse_data_list (var
, where
);
15801 t
= check_data_variable (var
, where
);
15811 /* Resolve the expressions and iterators associated with a data statement.
15812 This is separate from the assignment checking because data lists should
15813 only be resolved once. */
15816 resolve_data_variables (gfc_data_variable
*d
)
15818 for (; d
; d
= d
->next
)
15820 if (d
->list
== NULL
)
15822 if (!gfc_resolve_expr (d
->expr
))
15827 if (!gfc_resolve_iterator (&d
->iter
, false, true))
15830 if (!resolve_data_variables (d
->list
))
15839 /* Resolve a single DATA statement. We implement this by storing a pointer to
15840 the value list into static variables, and then recursively traversing the
15841 variables list, expanding iterators and such. */
15844 resolve_data (gfc_data
*d
)
15847 if (!resolve_data_variables (d
->var
))
15850 values
.vnode
= d
->value
;
15851 if (d
->value
== NULL
)
15852 mpz_set_ui (values
.left
, 0);
15854 mpz_set (values
.left
, d
->value
->repeat
);
15856 if (!traverse_data_var (d
->var
, &d
->where
))
15859 /* At this point, we better not have any values left. */
15861 if (next_data_value ())
15862 gfc_error ("DATA statement at %L has more values than variables",
15867 /* 12.6 Constraint: In a pure subprogram any variable which is in common or
15868 accessed by host or use association, is a dummy argument to a pure function,
15869 is a dummy argument with INTENT (IN) to a pure subroutine, or an object that
15870 is storage associated with any such variable, shall not be used in the
15871 following contexts: (clients of this function). */
15873 /* Determines if a variable is not 'pure', i.e., not assignable within a pure
15874 procedure. Returns zero if assignment is OK, nonzero if there is a
15877 gfc_impure_variable (gfc_symbol
*sym
)
15882 if (sym
->attr
.use_assoc
|| sym
->attr
.in_common
)
15885 /* Check if the symbol's ns is inside the pure procedure. */
15886 for (ns
= gfc_current_ns
; ns
; ns
= ns
->parent
)
15890 if (ns
->proc_name
->attr
.flavor
== FL_PROCEDURE
&& !sym
->attr
.function
)
15894 proc
= sym
->ns
->proc_name
;
15895 if (sym
->attr
.dummy
15896 && ((proc
->attr
.subroutine
&& sym
->attr
.intent
== INTENT_IN
)
15897 || proc
->attr
.function
))
15900 /* TODO: Sort out what can be storage associated, if anything, and include
15901 it here. In principle equivalences should be scanned but it does not
15902 seem to be possible to storage associate an impure variable this way. */
15907 /* Test whether a symbol is pure or not. For a NULL pointer, checks if the
15908 current namespace is inside a pure procedure. */
15911 gfc_pure (gfc_symbol
*sym
)
15913 symbol_attribute attr
;
15918 /* Check if the current namespace or one of its parents
15919 belongs to a pure procedure. */
15920 for (ns
= gfc_current_ns
; ns
; ns
= ns
->parent
)
15922 sym
= ns
->proc_name
;
15926 if (attr
.flavor
== FL_PROCEDURE
&& attr
.pure
)
15934 return attr
.flavor
== FL_PROCEDURE
&& attr
.pure
;
15938 /* Test whether a symbol is implicitly pure or not. For a NULL pointer,
15939 checks if the current namespace is implicitly pure. Note that this
15940 function returns false for a PURE procedure. */
15943 gfc_implicit_pure (gfc_symbol
*sym
)
15949 /* Check if the current procedure is implicit_pure. Walk up
15950 the procedure list until we find a procedure. */
15951 for (ns
= gfc_current_ns
; ns
; ns
= ns
->parent
)
15953 sym
= ns
->proc_name
;
15957 if (sym
->attr
.flavor
== FL_PROCEDURE
)
15962 return sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.implicit_pure
15963 && !sym
->attr
.pure
;
15968 gfc_unset_implicit_pure (gfc_symbol
*sym
)
15974 /* Check if the current procedure is implicit_pure. Walk up
15975 the procedure list until we find a procedure. */
15976 for (ns
= gfc_current_ns
; ns
; ns
= ns
->parent
)
15978 sym
= ns
->proc_name
;
15982 if (sym
->attr
.flavor
== FL_PROCEDURE
)
15987 if (sym
->attr
.flavor
== FL_PROCEDURE
)
15988 sym
->attr
.implicit_pure
= 0;
15990 sym
->attr
.pure
= 0;
15994 /* Test whether the current procedure is elemental or not. */
15997 gfc_elemental (gfc_symbol
*sym
)
15999 symbol_attribute attr
;
16002 sym
= gfc_current_ns
->proc_name
;
16007 return attr
.flavor
== FL_PROCEDURE
&& attr
.elemental
;
16011 /* Warn about unused labels. */
16014 warn_unused_fortran_label (gfc_st_label
*label
)
16019 warn_unused_fortran_label (label
->left
);
16021 if (label
->defined
== ST_LABEL_UNKNOWN
)
16024 switch (label
->referenced
)
16026 case ST_LABEL_UNKNOWN
:
16027 gfc_warning (OPT_Wunused_label
, "Label %d at %L defined but not used",
16028 label
->value
, &label
->where
);
16031 case ST_LABEL_BAD_TARGET
:
16032 gfc_warning (OPT_Wunused_label
,
16033 "Label %d at %L defined but cannot be used",
16034 label
->value
, &label
->where
);
16041 warn_unused_fortran_label (label
->right
);
16045 /* Returns the sequence type of a symbol or sequence. */
16048 sequence_type (gfc_typespec ts
)
16057 if (ts
.u
.derived
->components
== NULL
)
16058 return SEQ_NONDEFAULT
;
16060 result
= sequence_type (ts
.u
.derived
->components
->ts
);
16061 for (c
= ts
.u
.derived
->components
->next
; c
; c
= c
->next
)
16062 if (sequence_type (c
->ts
) != result
)
16068 if (ts
.kind
!= gfc_default_character_kind
)
16069 return SEQ_NONDEFAULT
;
16071 return SEQ_CHARACTER
;
16074 if (ts
.kind
!= gfc_default_integer_kind
)
16075 return SEQ_NONDEFAULT
;
16077 return SEQ_NUMERIC
;
16080 if (!(ts
.kind
== gfc_default_real_kind
16081 || ts
.kind
== gfc_default_double_kind
))
16082 return SEQ_NONDEFAULT
;
16084 return SEQ_NUMERIC
;
16087 if (ts
.kind
!= gfc_default_complex_kind
)
16088 return SEQ_NONDEFAULT
;
16090 return SEQ_NUMERIC
;
16093 if (ts
.kind
!= gfc_default_logical_kind
)
16094 return SEQ_NONDEFAULT
;
16096 return SEQ_NUMERIC
;
16099 return SEQ_NONDEFAULT
;
16104 /* Resolve derived type EQUIVALENCE object. */
16107 resolve_equivalence_derived (gfc_symbol
*derived
, gfc_symbol
*sym
, gfc_expr
*e
)
16109 gfc_component
*c
= derived
->components
;
16114 /* Shall not be an object of nonsequence derived type. */
16115 if (!derived
->attr
.sequence
)
16117 gfc_error ("Derived type variable %qs at %L must have SEQUENCE "
16118 "attribute to be an EQUIVALENCE object", sym
->name
,
16123 /* Shall not have allocatable components. */
16124 if (derived
->attr
.alloc_comp
)
16126 gfc_error ("Derived type variable %qs at %L cannot have ALLOCATABLE "
16127 "components to be an EQUIVALENCE object",sym
->name
,
16132 if (sym
->attr
.in_common
&& gfc_has_default_initializer (sym
->ts
.u
.derived
))
16134 gfc_error ("Derived type variable %qs at %L with default "
16135 "initialization cannot be in EQUIVALENCE with a variable "
16136 "in COMMON", sym
->name
, &e
->where
);
16140 for (; c
; c
= c
->next
)
16142 if (gfc_bt_struct (c
->ts
.type
)
16143 && (!resolve_equivalence_derived(c
->ts
.u
.derived
, sym
, e
)))
16146 /* Shall not be an object of sequence derived type containing a pointer
16147 in the structure. */
16148 if (c
->attr
.pointer
)
16150 gfc_error ("Derived type variable %qs at %L with pointer "
16151 "component(s) cannot be an EQUIVALENCE object",
16152 sym
->name
, &e
->where
);
16160 /* Resolve equivalence object.
16161 An EQUIVALENCE object shall not be a dummy argument, a pointer, a target,
16162 an allocatable array, an object of nonsequence derived type, an object of
16163 sequence derived type containing a pointer at any level of component
16164 selection, an automatic object, a function name, an entry name, a result
16165 name, a named constant, a structure component, or a subobject of any of
16166 the preceding objects. A substring shall not have length zero. A
16167 derived type shall not have components with default initialization nor
16168 shall two objects of an equivalence group be initialized.
16169 Either all or none of the objects shall have an protected attribute.
16170 The simple constraints are done in symbol.c(check_conflict) and the rest
16171 are implemented here. */
16174 resolve_equivalence (gfc_equiv
*eq
)
16177 gfc_symbol
*first_sym
;
16180 locus
*last_where
= NULL
;
16181 seq_type eq_type
, last_eq_type
;
16182 gfc_typespec
*last_ts
;
16183 int object
, cnt_protected
;
16186 last_ts
= &eq
->expr
->symtree
->n
.sym
->ts
;
16188 first_sym
= eq
->expr
->symtree
->n
.sym
;
16192 for (object
= 1; eq
; eq
= eq
->eq
, object
++)
16196 e
->ts
= e
->symtree
->n
.sym
->ts
;
16197 /* match_varspec might not know yet if it is seeing
16198 array reference or substring reference, as it doesn't
16200 if (e
->ref
&& e
->ref
->type
== REF_ARRAY
)
16202 gfc_ref
*ref
= e
->ref
;
16203 sym
= e
->symtree
->n
.sym
;
16205 if (sym
->attr
.dimension
)
16207 ref
->u
.ar
.as
= sym
->as
;
16211 /* For substrings, convert REF_ARRAY into REF_SUBSTRING. */
16212 if (e
->ts
.type
== BT_CHARACTER
16214 && ref
->type
== REF_ARRAY
16215 && ref
->u
.ar
.dimen
== 1
16216 && ref
->u
.ar
.dimen_type
[0] == DIMEN_RANGE
16217 && ref
->u
.ar
.stride
[0] == NULL
)
16219 gfc_expr
*start
= ref
->u
.ar
.start
[0];
16220 gfc_expr
*end
= ref
->u
.ar
.end
[0];
16223 /* Optimize away the (:) reference. */
16224 if (start
== NULL
&& end
== NULL
)
16227 e
->ref
= ref
->next
;
16229 e
->ref
->next
= ref
->next
;
16234 ref
->type
= REF_SUBSTRING
;
16236 start
= gfc_get_int_expr (gfc_charlen_int_kind
,
16238 ref
->u
.ss
.start
= start
;
16239 if (end
== NULL
&& e
->ts
.u
.cl
)
16240 end
= gfc_copy_expr (e
->ts
.u
.cl
->length
);
16241 ref
->u
.ss
.end
= end
;
16242 ref
->u
.ss
.length
= e
->ts
.u
.cl
;
16249 /* Any further ref is an error. */
16252 gcc_assert (ref
->type
== REF_ARRAY
);
16253 gfc_error ("Syntax error in EQUIVALENCE statement at %L",
16259 if (!gfc_resolve_expr (e
))
16262 sym
= e
->symtree
->n
.sym
;
16264 if (sym
->attr
.is_protected
)
16266 if (cnt_protected
> 0 && cnt_protected
!= object
)
16268 gfc_error ("Either all or none of the objects in the "
16269 "EQUIVALENCE set at %L shall have the "
16270 "PROTECTED attribute",
16275 /* Shall not equivalence common block variables in a PURE procedure. */
16276 if (sym
->ns
->proc_name
16277 && sym
->ns
->proc_name
->attr
.pure
16278 && sym
->attr
.in_common
)
16280 /* Need to check for symbols that may have entered the pure
16281 procedure via a USE statement. */
16282 bool saw_sym
= false;
16283 if (sym
->ns
->use_stmts
)
16286 for (r
= sym
->ns
->use_stmts
->rename
; r
; r
= r
->next
)
16287 if (strcmp(r
->use_name
, sym
->name
) == 0) saw_sym
= true;
16293 gfc_error ("COMMON block member %qs at %L cannot be an "
16294 "EQUIVALENCE object in the pure procedure %qs",
16295 sym
->name
, &e
->where
, sym
->ns
->proc_name
->name
);
16299 /* Shall not be a named constant. */
16300 if (e
->expr_type
== EXPR_CONSTANT
)
16302 gfc_error ("Named constant %qs at %L cannot be an EQUIVALENCE "
16303 "object", sym
->name
, &e
->where
);
16307 if (e
->ts
.type
== BT_DERIVED
16308 && !resolve_equivalence_derived (e
->ts
.u
.derived
, sym
, e
))
16311 /* Check that the types correspond correctly:
16313 A numeric sequence structure may be equivalenced to another sequence
16314 structure, an object of default integer type, default real type, double
16315 precision real type, default logical type such that components of the
16316 structure ultimately only become associated to objects of the same
16317 kind. A character sequence structure may be equivalenced to an object
16318 of default character kind or another character sequence structure.
16319 Other objects may be equivalenced only to objects of the same type and
16320 kind parameters. */
16322 /* Identical types are unconditionally OK. */
16323 if (object
== 1 || gfc_compare_types (last_ts
, &sym
->ts
))
16324 goto identical_types
;
16326 last_eq_type
= sequence_type (*last_ts
);
16327 eq_type
= sequence_type (sym
->ts
);
16329 /* Since the pair of objects is not of the same type, mixed or
16330 non-default sequences can be rejected. */
16332 msg
= "Sequence %s with mixed components in EQUIVALENCE "
16333 "statement at %L with different type objects";
16335 && last_eq_type
== SEQ_MIXED
16336 && !gfc_notify_std (GFC_STD_GNU
, msg
, first_sym
->name
, last_where
))
16337 || (eq_type
== SEQ_MIXED
16338 && !gfc_notify_std (GFC_STD_GNU
, msg
, sym
->name
, &e
->where
)))
16341 msg
= "Non-default type object or sequence %s in EQUIVALENCE "
16342 "statement at %L with objects of different type";
16344 && last_eq_type
== SEQ_NONDEFAULT
16345 && !gfc_notify_std (GFC_STD_GNU
, msg
, first_sym
->name
, last_where
))
16346 || (eq_type
== SEQ_NONDEFAULT
16347 && !gfc_notify_std (GFC_STD_GNU
, msg
, sym
->name
, &e
->where
)))
16350 msg
="Non-CHARACTER object %qs in default CHARACTER "
16351 "EQUIVALENCE statement at %L";
16352 if (last_eq_type
== SEQ_CHARACTER
16353 && eq_type
!= SEQ_CHARACTER
16354 && !gfc_notify_std (GFC_STD_GNU
, msg
, sym
->name
, &e
->where
))
16357 msg
="Non-NUMERIC object %qs in default NUMERIC "
16358 "EQUIVALENCE statement at %L";
16359 if (last_eq_type
== SEQ_NUMERIC
16360 && eq_type
!= SEQ_NUMERIC
16361 && !gfc_notify_std (GFC_STD_GNU
, msg
, sym
->name
, &e
->where
))
16366 last_where
= &e
->where
;
16371 /* Shall not be an automatic array. */
16372 if (e
->ref
->type
== REF_ARRAY
16373 && !gfc_resolve_array_spec (e
->ref
->u
.ar
.as
, 1))
16375 gfc_error ("Array %qs at %L with non-constant bounds cannot be "
16376 "an EQUIVALENCE object", sym
->name
, &e
->where
);
16383 /* Shall not be a structure component. */
16384 if (r
->type
== REF_COMPONENT
)
16386 gfc_error ("Structure component %qs at %L cannot be an "
16387 "EQUIVALENCE object",
16388 r
->u
.c
.component
->name
, &e
->where
);
16392 /* A substring shall not have length zero. */
16393 if (r
->type
== REF_SUBSTRING
)
16395 if (compare_bound (r
->u
.ss
.start
, r
->u
.ss
.end
) == CMP_GT
)
16397 gfc_error ("Substring at %L has length zero",
16398 &r
->u
.ss
.start
->where
);
16408 /* Function called by resolve_fntype to flag other symbol used in the
16409 length type parameter specification of function resuls. */
16412 flag_fn_result_spec (gfc_expr
*expr
,
16414 int *f ATTRIBUTE_UNUSED
)
16419 if (expr
->expr_type
== EXPR_VARIABLE
)
16421 s
= expr
->symtree
->n
.sym
;
16422 for (ns
= s
->ns
; ns
; ns
= ns
->parent
)
16428 gfc_error ("Self reference in character length expression "
16429 "for %qs at %L", sym
->name
, &expr
->where
);
16433 if (!s
->fn_result_spec
16434 && s
->attr
.flavor
== FL_PARAMETER
)
16436 /* Function contained in a module.... */
16437 if (ns
->proc_name
&& ns
->proc_name
->attr
.flavor
== FL_MODULE
)
16440 s
->fn_result_spec
= 1;
16441 /* Make sure that this symbol is translated as a module
16443 st
= gfc_get_unique_symtree (ns
);
16447 /* ... which is use associated and called. */
16448 else if (s
->attr
.use_assoc
|| s
->attr
.used_in_submodule
16450 /* External function matched with an interface. */
16453 && s
->ns
->proc_name
->attr
.if_source
== IFSRC_DECL
)
16454 || s
->ns
->proc_name
->attr
.if_source
== IFSRC_IFBODY
)
16455 && s
->ns
->proc_name
->attr
.function
))
16456 s
->fn_result_spec
= 1;
16463 /* Resolve function and ENTRY types, issue diagnostics if needed. */
16466 resolve_fntype (gfc_namespace
*ns
)
16468 gfc_entry_list
*el
;
16471 if (ns
->proc_name
== NULL
|| !ns
->proc_name
->attr
.function
)
16474 /* If there are any entries, ns->proc_name is the entry master
16475 synthetic symbol and ns->entries->sym actual FUNCTION symbol. */
16477 sym
= ns
->entries
->sym
;
16479 sym
= ns
->proc_name
;
16480 if (sym
->result
== sym
16481 && sym
->ts
.type
== BT_UNKNOWN
16482 && !gfc_set_default_type (sym
, 0, NULL
)
16483 && !sym
->attr
.untyped
)
16485 gfc_error ("Function %qs at %L has no IMPLICIT type",
16486 sym
->name
, &sym
->declared_at
);
16487 sym
->attr
.untyped
= 1;
16490 if (sym
->ts
.type
== BT_DERIVED
&& !sym
->ts
.u
.derived
->attr
.use_assoc
16491 && !sym
->attr
.contained
16492 && !gfc_check_symbol_access (sym
->ts
.u
.derived
)
16493 && gfc_check_symbol_access (sym
))
16495 gfc_notify_std (GFC_STD_F2003
, "PUBLIC function %qs at "
16496 "%L of PRIVATE type %qs", sym
->name
,
16497 &sym
->declared_at
, sym
->ts
.u
.derived
->name
);
16501 for (el
= ns
->entries
->next
; el
; el
= el
->next
)
16503 if (el
->sym
->result
== el
->sym
16504 && el
->sym
->ts
.type
== BT_UNKNOWN
16505 && !gfc_set_default_type (el
->sym
, 0, NULL
)
16506 && !el
->sym
->attr
.untyped
)
16508 gfc_error ("ENTRY %qs at %L has no IMPLICIT type",
16509 el
->sym
->name
, &el
->sym
->declared_at
);
16510 el
->sym
->attr
.untyped
= 1;
16514 if (sym
->ts
.type
== BT_CHARACTER
)
16515 gfc_traverse_expr (sym
->ts
.u
.cl
->length
, sym
, flag_fn_result_spec
, 0);
16519 /* 12.3.2.1.1 Defined operators. */
16522 check_uop_procedure (gfc_symbol
*sym
, locus where
)
16524 gfc_formal_arglist
*formal
;
16526 if (!sym
->attr
.function
)
16528 gfc_error ("User operator procedure %qs at %L must be a FUNCTION",
16529 sym
->name
, &where
);
16533 if (sym
->ts
.type
== BT_CHARACTER
16534 && !((sym
->ts
.u
.cl
&& sym
->ts
.u
.cl
->length
) || sym
->ts
.deferred
)
16535 && !(sym
->result
&& ((sym
->result
->ts
.u
.cl
16536 && sym
->result
->ts
.u
.cl
->length
) || sym
->result
->ts
.deferred
)))
16538 gfc_error ("User operator procedure %qs at %L cannot be assumed "
16539 "character length", sym
->name
, &where
);
16543 formal
= gfc_sym_get_dummy_args (sym
);
16544 if (!formal
|| !formal
->sym
)
16546 gfc_error ("User operator procedure %qs at %L must have at least "
16547 "one argument", sym
->name
, &where
);
16551 if (formal
->sym
->attr
.intent
!= INTENT_IN
)
16553 gfc_error ("First argument of operator interface at %L must be "
16554 "INTENT(IN)", &where
);
16558 if (formal
->sym
->attr
.optional
)
16560 gfc_error ("First argument of operator interface at %L cannot be "
16561 "optional", &where
);
16565 formal
= formal
->next
;
16566 if (!formal
|| !formal
->sym
)
16569 if (formal
->sym
->attr
.intent
!= INTENT_IN
)
16571 gfc_error ("Second argument of operator interface at %L must be "
16572 "INTENT(IN)", &where
);
16576 if (formal
->sym
->attr
.optional
)
16578 gfc_error ("Second argument of operator interface at %L cannot be "
16579 "optional", &where
);
16585 gfc_error ("Operator interface at %L must have, at most, two "
16586 "arguments", &where
);
16594 gfc_resolve_uops (gfc_symtree
*symtree
)
16596 gfc_interface
*itr
;
16598 if (symtree
== NULL
)
16601 gfc_resolve_uops (symtree
->left
);
16602 gfc_resolve_uops (symtree
->right
);
16604 for (itr
= symtree
->n
.uop
->op
; itr
; itr
= itr
->next
)
16605 check_uop_procedure (itr
->sym
, itr
->sym
->declared_at
);
16609 /* Examine all of the expressions associated with a program unit,
16610 assign types to all intermediate expressions, make sure that all
16611 assignments are to compatible types and figure out which names
16612 refer to which functions or subroutines. It doesn't check code
16613 block, which is handled by gfc_resolve_code. */
16616 resolve_types (gfc_namespace
*ns
)
16622 gfc_namespace
* old_ns
= gfc_current_ns
;
16624 if (ns
->types_resolved
)
16627 /* Check that all IMPLICIT types are ok. */
16628 if (!ns
->seen_implicit_none
)
16631 for (letter
= 0; letter
!= GFC_LETTERS
; ++letter
)
16632 if (ns
->set_flag
[letter
]
16633 && !resolve_typespec_used (&ns
->default_type
[letter
],
16634 &ns
->implicit_loc
[letter
], NULL
))
16638 gfc_current_ns
= ns
;
16640 resolve_entries (ns
);
16642 resolve_common_vars (&ns
->blank_common
, false);
16643 resolve_common_blocks (ns
->common_root
);
16645 resolve_contained_functions (ns
);
16647 if (ns
->proc_name
&& ns
->proc_name
->attr
.flavor
== FL_PROCEDURE
16648 && ns
->proc_name
->attr
.if_source
== IFSRC_IFBODY
)
16649 resolve_formal_arglist (ns
->proc_name
);
16651 gfc_traverse_ns (ns
, resolve_bind_c_derived_types
);
16653 for (cl
= ns
->cl_list
; cl
; cl
= cl
->next
)
16654 resolve_charlen (cl
);
16656 gfc_traverse_ns (ns
, resolve_symbol
);
16658 resolve_fntype (ns
);
16660 for (n
= ns
->contained
; n
; n
= n
->sibling
)
16662 if (gfc_pure (ns
->proc_name
) && !gfc_pure (n
->proc_name
))
16663 gfc_error ("Contained procedure %qs at %L of a PURE procedure must "
16664 "also be PURE", n
->proc_name
->name
,
16665 &n
->proc_name
->declared_at
);
16671 gfc_do_concurrent_flag
= 0;
16672 gfc_check_interfaces (ns
);
16674 gfc_traverse_ns (ns
, resolve_values
);
16676 if (ns
->save_all
|| !flag_automatic
)
16680 for (d
= ns
->data
; d
; d
= d
->next
)
16684 gfc_traverse_ns (ns
, gfc_formalize_init_value
);
16686 gfc_traverse_ns (ns
, gfc_verify_binding_labels
);
16688 for (eq
= ns
->equiv
; eq
; eq
= eq
->next
)
16689 resolve_equivalence (eq
);
16691 /* Warn about unused labels. */
16692 if (warn_unused_label
)
16693 warn_unused_fortran_label (ns
->st_labels
);
16695 gfc_resolve_uops (ns
->uop_root
);
16697 gfc_traverse_ns (ns
, gfc_verify_DTIO_procedures
);
16699 gfc_resolve_omp_declare_simd (ns
);
16701 gfc_resolve_omp_udrs (ns
->omp_udr_root
);
16703 ns
->types_resolved
= 1;
16705 gfc_current_ns
= old_ns
;
16709 /* Call gfc_resolve_code recursively. */
16712 resolve_codes (gfc_namespace
*ns
)
16715 bitmap_obstack old_obstack
;
16717 if (ns
->resolved
== 1)
16720 for (n
= ns
->contained
; n
; n
= n
->sibling
)
16723 gfc_current_ns
= ns
;
16725 /* Don't clear 'cs_base' if this is the namespace of a BLOCK construct. */
16726 if (!(ns
->proc_name
&& ns
->proc_name
->attr
.flavor
== FL_LABEL
))
16729 /* Set to an out of range value. */
16730 current_entry_id
= -1;
16732 old_obstack
= labels_obstack
;
16733 bitmap_obstack_initialize (&labels_obstack
);
16735 gfc_resolve_oacc_declare (ns
);
16736 gfc_resolve_omp_local_vars (ns
);
16737 gfc_resolve_code (ns
->code
, ns
);
16739 bitmap_obstack_release (&labels_obstack
);
16740 labels_obstack
= old_obstack
;
16744 /* This function is called after a complete program unit has been compiled.
16745 Its purpose is to examine all of the expressions associated with a program
16746 unit, assign types to all intermediate expressions, make sure that all
16747 assignments are to compatible types and figure out which names refer to
16748 which functions or subroutines. */
16751 gfc_resolve (gfc_namespace
*ns
)
16753 gfc_namespace
*old_ns
;
16754 code_stack
*old_cs_base
;
16755 struct gfc_omp_saved_state old_omp_state
;
16761 old_ns
= gfc_current_ns
;
16762 old_cs_base
= cs_base
;
16764 /* As gfc_resolve can be called during resolution of an OpenMP construct
16765 body, we should clear any state associated to it, so that say NS's
16766 DO loops are not interpreted as OpenMP loops. */
16767 if (!ns
->construct_entities
)
16768 gfc_omp_save_and_clear_state (&old_omp_state
);
16770 resolve_types (ns
);
16771 component_assignment_level
= 0;
16772 resolve_codes (ns
);
16774 gfc_current_ns
= old_ns
;
16775 cs_base
= old_cs_base
;
16778 gfc_run_passes (ns
);
16780 if (!ns
->construct_entities
)
16781 gfc_omp_restore_state (&old_omp_state
);