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 cannot 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 cannot 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 cannot 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 cannot 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 cannot 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 cannot be of type %s "
900 "in FUNCTION %s at %L", sym
->name
,
901 gfc_typename (ts
), ns
->entries
->sym
->name
,
908 proc
->attr
.access
= ACCESS_PRIVATE
;
909 proc
->attr
.entry_master
= 1;
911 /* Merge all the entry point arguments. */
912 for (el
= ns
->entries
; el
; el
= el
->next
)
913 merge_argument_lists (proc
, el
->sym
->formal
);
915 /* Check the master formal arguments for any that are not
916 present in all entry points. */
917 for (el
= ns
->entries
; el
; el
= el
->next
)
918 check_argument_lists (proc
, el
->sym
->formal
);
920 /* Use the master function for the function body. */
921 ns
->proc_name
= proc
;
923 /* Finalize the new symbols. */
924 gfc_commit_symbols ();
926 /* Restore the original namespace. */
927 gfc_current_ns
= old_ns
;
931 /* Resolve common variables. */
933 resolve_common_vars (gfc_common_head
*common_block
, bool named_common
)
935 gfc_symbol
*csym
= common_block
->head
;
937 for (; csym
; csym
= csym
->common_next
)
939 /* gfc_add_in_common may have been called before, but the reported errors
940 have been ignored to continue parsing.
941 We do the checks again here. */
942 if (!csym
->attr
.use_assoc
)
944 gfc_add_in_common (&csym
->attr
, csym
->name
, &common_block
->where
);
945 gfc_notify_std (GFC_STD_F2018_OBS
, "COMMON block at %L",
946 &common_block
->where
);
949 if (csym
->value
|| csym
->attr
.data
)
951 if (!csym
->ns
->is_block_data
)
952 gfc_notify_std (GFC_STD_GNU
, "Variable %qs at %L is in COMMON "
953 "but only in BLOCK DATA initialization is "
954 "allowed", csym
->name
, &csym
->declared_at
);
955 else if (!named_common
)
956 gfc_notify_std (GFC_STD_GNU
, "Initialized variable %qs at %L is "
957 "in a blank COMMON but initialization is only "
958 "allowed in named common blocks", csym
->name
,
962 if (UNLIMITED_POLY (csym
))
963 gfc_error_now ("%qs in cannot appear in COMMON at %L "
964 "[F2008:C5100]", csym
->name
, &csym
->declared_at
);
966 if (csym
->ts
.type
!= BT_DERIVED
)
969 if (!(csym
->ts
.u
.derived
->attr
.sequence
970 || csym
->ts
.u
.derived
->attr
.is_bind_c
))
971 gfc_error_now ("Derived type variable %qs in COMMON at %L "
972 "has neither the SEQUENCE nor the BIND(C) "
973 "attribute", csym
->name
, &csym
->declared_at
);
974 if (csym
->ts
.u
.derived
->attr
.alloc_comp
)
975 gfc_error_now ("Derived type variable %qs in COMMON at %L "
976 "has an ultimate component that is "
977 "allocatable", csym
->name
, &csym
->declared_at
);
978 if (gfc_has_default_initializer (csym
->ts
.u
.derived
))
979 gfc_error_now ("Derived type variable %qs in COMMON at %L "
980 "may not have default initializer", csym
->name
,
983 if (csym
->attr
.flavor
== FL_UNKNOWN
&& !csym
->attr
.proc_pointer
)
984 gfc_add_flavor (&csym
->attr
, FL_VARIABLE
, csym
->name
, &csym
->declared_at
);
988 /* Resolve common blocks. */
990 resolve_common_blocks (gfc_symtree
*common_root
)
995 if (common_root
== NULL
)
998 if (common_root
->left
)
999 resolve_common_blocks (common_root
->left
);
1000 if (common_root
->right
)
1001 resolve_common_blocks (common_root
->right
);
1003 resolve_common_vars (common_root
->n
.common
, true);
1005 /* The common name is a global name - in Fortran 2003 also if it has a
1006 C binding name, since Fortran 2008 only the C binding name is a global
1008 if (!common_root
->n
.common
->binding_label
1009 || gfc_notification_std (GFC_STD_F2008
))
1011 gsym
= gfc_find_gsymbol (gfc_gsym_root
,
1012 common_root
->n
.common
->name
);
1014 if (gsym
&& gfc_notification_std (GFC_STD_F2008
)
1015 && gsym
->type
== GSYM_COMMON
1016 && ((common_root
->n
.common
->binding_label
1017 && (!gsym
->binding_label
1018 || strcmp (common_root
->n
.common
->binding_label
,
1019 gsym
->binding_label
) != 0))
1020 || (!common_root
->n
.common
->binding_label
1021 && gsym
->binding_label
)))
1023 gfc_error ("In Fortran 2003 COMMON %qs block at %L is a global "
1024 "identifier and must thus have the same binding name "
1025 "as the same-named COMMON block at %L: %s vs %s",
1026 common_root
->n
.common
->name
, &common_root
->n
.common
->where
,
1028 common_root
->n
.common
->binding_label
1029 ? common_root
->n
.common
->binding_label
: "(blank)",
1030 gsym
->binding_label
? gsym
->binding_label
: "(blank)");
1034 if (gsym
&& gsym
->type
!= GSYM_COMMON
1035 && !common_root
->n
.common
->binding_label
)
1037 gfc_error ("COMMON block %qs at %L uses the same global identifier "
1039 common_root
->n
.common
->name
, &common_root
->n
.common
->where
,
1043 if (gsym
&& gsym
->type
!= GSYM_COMMON
)
1045 gfc_error ("Fortran 2008: COMMON block %qs with binding label at "
1046 "%L sharing the identifier with global non-COMMON-block "
1047 "entity at %L", common_root
->n
.common
->name
,
1048 &common_root
->n
.common
->where
, &gsym
->where
);
1053 gsym
= gfc_get_gsymbol (common_root
->n
.common
->name
);
1054 gsym
->type
= GSYM_COMMON
;
1055 gsym
->where
= common_root
->n
.common
->where
;
1061 if (common_root
->n
.common
->binding_label
)
1063 gsym
= gfc_find_gsymbol (gfc_gsym_root
,
1064 common_root
->n
.common
->binding_label
);
1065 if (gsym
&& gsym
->type
!= GSYM_COMMON
)
1067 gfc_error ("COMMON block at %L with binding label %qs uses the same "
1068 "global identifier as entity at %L",
1069 &common_root
->n
.common
->where
,
1070 common_root
->n
.common
->binding_label
, &gsym
->where
);
1075 gsym
= gfc_get_gsymbol (common_root
->n
.common
->binding_label
);
1076 gsym
->type
= GSYM_COMMON
;
1077 gsym
->where
= common_root
->n
.common
->where
;
1083 gfc_find_symbol (common_root
->name
, gfc_current_ns
, 0, &sym
);
1087 if (sym
->attr
.flavor
== FL_PARAMETER
)
1088 gfc_error ("COMMON block %qs at %L is used as PARAMETER at %L",
1089 sym
->name
, &common_root
->n
.common
->where
, &sym
->declared_at
);
1091 if (sym
->attr
.external
)
1092 gfc_error ("COMMON block %qs at %L cannot have the EXTERNAL attribute",
1093 sym
->name
, &common_root
->n
.common
->where
);
1095 if (sym
->attr
.intrinsic
)
1096 gfc_error ("COMMON block %qs at %L is also an intrinsic procedure",
1097 sym
->name
, &common_root
->n
.common
->where
);
1098 else if (sym
->attr
.result
1099 || gfc_is_function_return_value (sym
, gfc_current_ns
))
1100 gfc_notify_std (GFC_STD_F2003
, "COMMON block %qs at %L "
1101 "that is also a function result", sym
->name
,
1102 &common_root
->n
.common
->where
);
1103 else if (sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.proc
!= PROC_INTERNAL
1104 && sym
->attr
.proc
!= PROC_ST_FUNCTION
)
1105 gfc_notify_std (GFC_STD_F2003
, "COMMON block %qs at %L "
1106 "that is also a global procedure", sym
->name
,
1107 &common_root
->n
.common
->where
);
1111 /* Resolve contained function types. Because contained functions can call one
1112 another, they have to be worked out before any of the contained procedures
1115 The good news is that if a function doesn't already have a type, the only
1116 way it can get one is through an IMPLICIT type or a RESULT variable, because
1117 by definition contained functions are contained namespace they're contained
1118 in, not in a sibling or parent namespace. */
1121 resolve_contained_functions (gfc_namespace
*ns
)
1123 gfc_namespace
*child
;
1126 resolve_formal_arglists (ns
);
1128 for (child
= ns
->contained
; child
; child
= child
->sibling
)
1130 /* Resolve alternate entry points first. */
1131 resolve_entries (child
);
1133 /* Then check function return types. */
1134 resolve_contained_fntype (child
->proc_name
, child
);
1135 for (el
= child
->entries
; el
; el
= el
->next
)
1136 resolve_contained_fntype (el
->sym
, child
);
1142 /* A Parameterized Derived Type constructor must contain values for
1143 the PDT KIND parameters or they must have a default initializer.
1144 Go through the constructor picking out the KIND expressions,
1145 storing them in 'param_list' and then call gfc_get_pdt_instance
1146 to obtain the PDT instance. */
1148 static gfc_actual_arglist
*param_list
, *param_tail
, *param
;
1151 get_pdt_spec_expr (gfc_component
*c
, gfc_expr
*expr
)
1153 param
= gfc_get_actual_arglist ();
1155 param_list
= param_tail
= param
;
1158 param_tail
->next
= param
;
1159 param_tail
= param_tail
->next
;
1162 param_tail
->name
= c
->name
;
1164 param_tail
->expr
= gfc_copy_expr (expr
);
1165 else if (c
->initializer
)
1166 param_tail
->expr
= gfc_copy_expr (c
->initializer
);
1169 param_tail
->spec_type
= SPEC_ASSUMED
;
1170 if (c
->attr
.pdt_kind
)
1172 gfc_error ("The KIND parameter %qs in the PDT constructor "
1173 "at %C has no value", param
->name
);
1182 get_pdt_constructor (gfc_expr
*expr
, gfc_constructor
**constr
,
1183 gfc_symbol
*derived
)
1185 gfc_constructor
*cons
= NULL
;
1186 gfc_component
*comp
;
1189 if (expr
&& expr
->expr_type
== EXPR_STRUCTURE
)
1190 cons
= gfc_constructor_first (expr
->value
.constructor
);
1195 comp
= derived
->components
;
1197 for (; comp
&& cons
; comp
= comp
->next
, cons
= gfc_constructor_next (cons
))
1200 && cons
->expr
->expr_type
== EXPR_STRUCTURE
1201 && comp
->ts
.type
== BT_DERIVED
)
1203 t
= get_pdt_constructor (cons
->expr
, NULL
, comp
->ts
.u
.derived
);
1207 else if (comp
->ts
.type
== BT_DERIVED
)
1209 t
= get_pdt_constructor (NULL
, &cons
, comp
->ts
.u
.derived
);
1213 else if ((comp
->attr
.pdt_kind
|| comp
->attr
.pdt_len
)
1214 && derived
->attr
.pdt_template
)
1216 t
= get_pdt_spec_expr (comp
, cons
->expr
);
1225 static bool resolve_fl_derived0 (gfc_symbol
*sym
);
1226 static bool resolve_fl_struct (gfc_symbol
*sym
);
1229 /* Resolve all of the elements of a structure constructor and make sure that
1230 the types are correct. The 'init' flag indicates that the given
1231 constructor is an initializer. */
1234 resolve_structure_cons (gfc_expr
*expr
, int init
)
1236 gfc_constructor
*cons
;
1237 gfc_component
*comp
;
1243 if (expr
->ts
.type
== BT_DERIVED
|| expr
->ts
.type
== BT_UNION
)
1245 if (expr
->ts
.u
.derived
->attr
.flavor
== FL_DERIVED
)
1246 resolve_fl_derived0 (expr
->ts
.u
.derived
);
1248 resolve_fl_struct (expr
->ts
.u
.derived
);
1250 /* If this is a Parameterized Derived Type template, find the
1251 instance corresponding to the PDT kind parameters. */
1252 if (expr
->ts
.u
.derived
->attr
.pdt_template
)
1255 t
= get_pdt_constructor (expr
, NULL
, expr
->ts
.u
.derived
);
1258 gfc_get_pdt_instance (param_list
, &expr
->ts
.u
.derived
, NULL
);
1260 expr
->param_list
= gfc_copy_actual_arglist (param_list
);
1263 gfc_free_actual_arglist (param_list
);
1265 if (!expr
->ts
.u
.derived
->attr
.pdt_type
)
1270 cons
= gfc_constructor_first (expr
->value
.constructor
);
1272 /* A constructor may have references if it is the result of substituting a
1273 parameter variable. In this case we just pull out the component we
1276 comp
= expr
->ref
->u
.c
.sym
->components
;
1278 comp
= expr
->ts
.u
.derived
->components
;
1280 for (; comp
&& cons
; comp
= comp
->next
, cons
= gfc_constructor_next (cons
))
1287 /* Unions use an EXPR_NULL contrived expression to tell the translation
1288 phase to generate an initializer of the appropriate length.
1290 if (cons
->expr
->ts
.type
== BT_UNION
&& cons
->expr
->expr_type
== EXPR_NULL
)
1293 if (!gfc_resolve_expr (cons
->expr
))
1299 rank
= comp
->as
? comp
->as
->rank
: 0;
1300 if (comp
->ts
.type
== BT_CLASS
1301 && !comp
->ts
.u
.derived
->attr
.unlimited_polymorphic
1302 && CLASS_DATA (comp
)->as
)
1303 rank
= CLASS_DATA (comp
)->as
->rank
;
1305 if (cons
->expr
->expr_type
!= EXPR_NULL
&& rank
!= cons
->expr
->rank
1306 && (comp
->attr
.allocatable
|| cons
->expr
->rank
))
1308 gfc_error ("The rank of the element in the structure "
1309 "constructor at %L does not match that of the "
1310 "component (%d/%d)", &cons
->expr
->where
,
1311 cons
->expr
->rank
, rank
);
1315 /* If we don't have the right type, try to convert it. */
1317 if (!comp
->attr
.proc_pointer
&&
1318 !gfc_compare_types (&cons
->expr
->ts
, &comp
->ts
))
1320 if (strcmp (comp
->name
, "_extends") == 0)
1322 /* Can afford to be brutal with the _extends initializer.
1323 The derived type can get lost because it is PRIVATE
1324 but it is not usage constrained by the standard. */
1325 cons
->expr
->ts
= comp
->ts
;
1327 else if (comp
->attr
.pointer
&& cons
->expr
->ts
.type
!= BT_UNKNOWN
)
1329 gfc_error ("The element in the structure constructor at %L, "
1330 "for pointer component %qs, is %s but should be %s",
1331 &cons
->expr
->where
, comp
->name
,
1332 gfc_basic_typename (cons
->expr
->ts
.type
),
1333 gfc_basic_typename (comp
->ts
.type
));
1338 bool t2
= gfc_convert_type (cons
->expr
, &comp
->ts
, 1);
1344 /* For strings, the length of the constructor should be the same as
1345 the one of the structure, ensure this if the lengths are known at
1346 compile time and when we are dealing with PARAMETER or structure
1348 if (cons
->expr
->ts
.type
== BT_CHARACTER
&& comp
->ts
.u
.cl
1349 && comp
->ts
.u
.cl
->length
1350 && comp
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
1351 && cons
->expr
->ts
.u
.cl
&& cons
->expr
->ts
.u
.cl
->length
1352 && cons
->expr
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
1353 && cons
->expr
->rank
!= 0
1354 && mpz_cmp (cons
->expr
->ts
.u
.cl
->length
->value
.integer
,
1355 comp
->ts
.u
.cl
->length
->value
.integer
) != 0)
1357 if (cons
->expr
->expr_type
== EXPR_VARIABLE
1358 && cons
->expr
->symtree
->n
.sym
->attr
.flavor
== FL_PARAMETER
)
1360 /* Wrap the parameter in an array constructor (EXPR_ARRAY)
1361 to make use of the gfc_resolve_character_array_constructor
1362 machinery. The expression is later simplified away to
1363 an array of string literals. */
1364 gfc_expr
*para
= cons
->expr
;
1365 cons
->expr
= gfc_get_expr ();
1366 cons
->expr
->ts
= para
->ts
;
1367 cons
->expr
->where
= para
->where
;
1368 cons
->expr
->expr_type
= EXPR_ARRAY
;
1369 cons
->expr
->rank
= para
->rank
;
1370 cons
->expr
->shape
= gfc_copy_shape (para
->shape
, para
->rank
);
1371 gfc_constructor_append_expr (&cons
->expr
->value
.constructor
,
1372 para
, &cons
->expr
->where
);
1375 if (cons
->expr
->expr_type
== EXPR_ARRAY
)
1377 /* Rely on the cleanup of the namespace to deal correctly with
1378 the old charlen. (There was a block here that attempted to
1379 remove the charlen but broke the chain in so doing.) */
1380 cons
->expr
->ts
.u
.cl
= gfc_new_charlen (gfc_current_ns
, NULL
);
1381 cons
->expr
->ts
.u
.cl
->length_from_typespec
= true;
1382 cons
->expr
->ts
.u
.cl
->length
= gfc_copy_expr (comp
->ts
.u
.cl
->length
);
1383 gfc_resolve_character_array_constructor (cons
->expr
);
1387 if (cons
->expr
->expr_type
== EXPR_NULL
1388 && !(comp
->attr
.pointer
|| comp
->attr
.allocatable
1389 || comp
->attr
.proc_pointer
|| comp
->ts
.f90_type
== BT_VOID
1390 || (comp
->ts
.type
== BT_CLASS
1391 && (CLASS_DATA (comp
)->attr
.class_pointer
1392 || CLASS_DATA (comp
)->attr
.allocatable
))))
1395 gfc_error ("The NULL in the structure constructor at %L is "
1396 "being applied to component %qs, which is neither "
1397 "a POINTER nor ALLOCATABLE", &cons
->expr
->where
,
1401 if (comp
->attr
.proc_pointer
&& comp
->ts
.interface
)
1403 /* Check procedure pointer interface. */
1404 gfc_symbol
*s2
= NULL
;
1409 c2
= gfc_get_proc_ptr_comp (cons
->expr
);
1412 s2
= c2
->ts
.interface
;
1415 else if (cons
->expr
->expr_type
== EXPR_FUNCTION
)
1417 s2
= cons
->expr
->symtree
->n
.sym
->result
;
1418 name
= cons
->expr
->symtree
->n
.sym
->result
->name
;
1420 else if (cons
->expr
->expr_type
!= EXPR_NULL
)
1422 s2
= cons
->expr
->symtree
->n
.sym
;
1423 name
= cons
->expr
->symtree
->n
.sym
->name
;
1426 if (s2
&& !gfc_compare_interfaces (comp
->ts
.interface
, s2
, name
, 0, 1,
1427 err
, sizeof (err
), NULL
, NULL
))
1429 gfc_error_opt (OPT_Wargument_mismatch
,
1430 "Interface mismatch for procedure-pointer "
1431 "component %qs in structure constructor at %L:"
1432 " %s", comp
->name
, &cons
->expr
->where
, err
);
1437 if (!comp
->attr
.pointer
|| comp
->attr
.proc_pointer
1438 || cons
->expr
->expr_type
== EXPR_NULL
)
1441 a
= gfc_expr_attr (cons
->expr
);
1443 if (!a
.pointer
&& !a
.target
)
1446 gfc_error ("The element in the structure constructor at %L, "
1447 "for pointer component %qs should be a POINTER or "
1448 "a TARGET", &cons
->expr
->where
, comp
->name
);
1453 /* F08:C461. Additional checks for pointer initialization. */
1457 gfc_error ("Pointer initialization target at %L "
1458 "must not be ALLOCATABLE", &cons
->expr
->where
);
1463 gfc_error ("Pointer initialization target at %L "
1464 "must have the SAVE attribute", &cons
->expr
->where
);
1468 /* F2003, C1272 (3). */
1469 bool impure
= cons
->expr
->expr_type
== EXPR_VARIABLE
1470 && (gfc_impure_variable (cons
->expr
->symtree
->n
.sym
)
1471 || gfc_is_coindexed (cons
->expr
));
1472 if (impure
&& gfc_pure (NULL
))
1475 gfc_error ("Invalid expression in the structure constructor for "
1476 "pointer component %qs at %L in PURE procedure",
1477 comp
->name
, &cons
->expr
->where
);
1481 gfc_unset_implicit_pure (NULL
);
1488 /****************** Expression name resolution ******************/
1490 /* Returns 0 if a symbol was not declared with a type or
1491 attribute declaration statement, nonzero otherwise. */
1494 was_declared (gfc_symbol
*sym
)
1500 if (!a
.implicit_type
&& sym
->ts
.type
!= BT_UNKNOWN
)
1503 if (a
.allocatable
|| a
.dimension
|| a
.dummy
|| a
.external
|| a
.intrinsic
1504 || a
.optional
|| a
.pointer
|| a
.save
|| a
.target
|| a
.volatile_
1505 || a
.value
|| a
.access
!= ACCESS_UNKNOWN
|| a
.intent
!= INTENT_UNKNOWN
1506 || a
.asynchronous
|| a
.codimension
)
1513 /* Determine if a symbol is generic or not. */
1516 generic_sym (gfc_symbol
*sym
)
1520 if (sym
->attr
.generic
||
1521 (sym
->attr
.intrinsic
&& gfc_generic_intrinsic (sym
->name
)))
1524 if (was_declared (sym
) || sym
->ns
->parent
== NULL
)
1527 gfc_find_symbol (sym
->name
, sym
->ns
->parent
, 1, &s
);
1534 return generic_sym (s
);
1541 /* Determine if a symbol is specific or not. */
1544 specific_sym (gfc_symbol
*sym
)
1548 if (sym
->attr
.if_source
== IFSRC_IFBODY
1549 || sym
->attr
.proc
== PROC_MODULE
1550 || sym
->attr
.proc
== PROC_INTERNAL
1551 || sym
->attr
.proc
== PROC_ST_FUNCTION
1552 || (sym
->attr
.intrinsic
&& gfc_specific_intrinsic (sym
->name
))
1553 || sym
->attr
.external
)
1556 if (was_declared (sym
) || sym
->ns
->parent
== NULL
)
1559 gfc_find_symbol (sym
->name
, sym
->ns
->parent
, 1, &s
);
1561 return (s
== NULL
) ? 0 : specific_sym (s
);
1565 /* Figure out if the procedure is specific, generic or unknown. */
1568 { PTYPE_GENERIC
= 1, PTYPE_SPECIFIC
, PTYPE_UNKNOWN
};
1571 procedure_kind (gfc_symbol
*sym
)
1573 if (generic_sym (sym
))
1574 return PTYPE_GENERIC
;
1576 if (specific_sym (sym
))
1577 return PTYPE_SPECIFIC
;
1579 return PTYPE_UNKNOWN
;
1582 /* Check references to assumed size arrays. The flag need_full_assumed_size
1583 is nonzero when matching actual arguments. */
1585 static int need_full_assumed_size
= 0;
1588 check_assumed_size_reference (gfc_symbol
*sym
, gfc_expr
*e
)
1590 if (need_full_assumed_size
|| !(sym
->as
&& sym
->as
->type
== AS_ASSUMED_SIZE
))
1593 /* FIXME: The comparison "e->ref->u.ar.type == AR_FULL" is wrong.
1594 What should it be? */
1595 if (e
->ref
&& (e
->ref
->u
.ar
.end
[e
->ref
->u
.ar
.as
->rank
- 1] == NULL
)
1596 && (e
->ref
->u
.ar
.as
->type
== AS_ASSUMED_SIZE
)
1597 && (e
->ref
->u
.ar
.type
== AR_FULL
))
1599 gfc_error ("The upper bound in the last dimension must "
1600 "appear in the reference to the assumed size "
1601 "array %qs at %L", sym
->name
, &e
->where
);
1608 /* Look for bad assumed size array references in argument expressions
1609 of elemental and array valued intrinsic procedures. Since this is
1610 called from procedure resolution functions, it only recurses at
1614 resolve_assumed_size_actual (gfc_expr
*e
)
1619 switch (e
->expr_type
)
1622 if (e
->symtree
&& check_assumed_size_reference (e
->symtree
->n
.sym
, e
))
1627 if (resolve_assumed_size_actual (e
->value
.op
.op1
)
1628 || resolve_assumed_size_actual (e
->value
.op
.op2
))
1639 /* Check a generic procedure, passed as an actual argument, to see if
1640 there is a matching specific name. If none, it is an error, and if
1641 more than one, the reference is ambiguous. */
1643 count_specific_procs (gfc_expr
*e
)
1650 sym
= e
->symtree
->n
.sym
;
1652 for (p
= sym
->generic
; p
; p
= p
->next
)
1653 if (strcmp (sym
->name
, p
->sym
->name
) == 0)
1655 e
->symtree
= gfc_find_symtree (p
->sym
->ns
->sym_root
,
1661 gfc_error ("%qs at %L is ambiguous", e
->symtree
->n
.sym
->name
,
1665 gfc_error ("GENERIC procedure %qs is not allowed as an actual "
1666 "argument at %L", sym
->name
, &e
->where
);
1672 /* See if a call to sym could possibly be a not allowed RECURSION because of
1673 a missing RECURSIVE declaration. This means that either sym is the current
1674 context itself, or sym is the parent of a contained procedure calling its
1675 non-RECURSIVE containing procedure.
1676 This also works if sym is an ENTRY. */
1679 is_illegal_recursion (gfc_symbol
* sym
, gfc_namespace
* context
)
1681 gfc_symbol
* proc_sym
;
1682 gfc_symbol
* context_proc
;
1683 gfc_namespace
* real_context
;
1685 if (sym
->attr
.flavor
== FL_PROGRAM
1686 || gfc_fl_struct (sym
->attr
.flavor
))
1689 /* If we've got an ENTRY, find real procedure. */
1690 if (sym
->attr
.entry
&& sym
->ns
->entries
)
1691 proc_sym
= sym
->ns
->entries
->sym
;
1695 /* If sym is RECURSIVE, all is well of course. */
1696 if (proc_sym
->attr
.recursive
|| flag_recursive
)
1699 /* Find the context procedure's "real" symbol if it has entries.
1700 We look for a procedure symbol, so recurse on the parents if we don't
1701 find one (like in case of a BLOCK construct). */
1702 for (real_context
= context
; ; real_context
= real_context
->parent
)
1704 /* We should find something, eventually! */
1705 gcc_assert (real_context
);
1707 context_proc
= (real_context
->entries
? real_context
->entries
->sym
1708 : real_context
->proc_name
);
1710 /* In some special cases, there may not be a proc_name, like for this
1712 real(bad_kind()) function foo () ...
1713 when checking the call to bad_kind ().
1714 In these cases, we simply return here and assume that the
1719 if (context_proc
->attr
.flavor
!= FL_LABEL
)
1723 /* A call from sym's body to itself is recursion, of course. */
1724 if (context_proc
== proc_sym
)
1727 /* The same is true if context is a contained procedure and sym the
1729 if (context_proc
->attr
.contained
)
1731 gfc_symbol
* parent_proc
;
1733 gcc_assert (context
->parent
);
1734 parent_proc
= (context
->parent
->entries
? context
->parent
->entries
->sym
1735 : context
->parent
->proc_name
);
1737 if (parent_proc
== proc_sym
)
1745 /* Resolve an intrinsic procedure: Set its function/subroutine attribute,
1746 its typespec and formal argument list. */
1749 gfc_resolve_intrinsic (gfc_symbol
*sym
, locus
*loc
)
1751 gfc_intrinsic_sym
* isym
= NULL
;
1757 /* Already resolved. */
1758 if (sym
->from_intmod
&& sym
->ts
.type
!= BT_UNKNOWN
)
1761 /* We already know this one is an intrinsic, so we don't call
1762 gfc_is_intrinsic for full checking but rather use gfc_find_function and
1763 gfc_find_subroutine directly to check whether it is a function or
1766 if (sym
->intmod_sym_id
&& sym
->attr
.subroutine
)
1768 gfc_isym_id id
= gfc_isym_id_by_intmod_sym (sym
);
1769 isym
= gfc_intrinsic_subroutine_by_id (id
);
1771 else if (sym
->intmod_sym_id
)
1773 gfc_isym_id id
= gfc_isym_id_by_intmod_sym (sym
);
1774 isym
= gfc_intrinsic_function_by_id (id
);
1776 else if (!sym
->attr
.subroutine
)
1777 isym
= gfc_find_function (sym
->name
);
1779 if (isym
&& !sym
->attr
.subroutine
)
1781 if (sym
->ts
.type
!= BT_UNKNOWN
&& warn_surprising
1782 && !sym
->attr
.implicit_type
)
1783 gfc_warning (OPT_Wsurprising
,
1784 "Type specified for intrinsic function %qs at %L is"
1785 " ignored", sym
->name
, &sym
->declared_at
);
1787 if (!sym
->attr
.function
&&
1788 !gfc_add_function(&sym
->attr
, sym
->name
, loc
))
1793 else if (isym
|| (isym
= gfc_find_subroutine (sym
->name
)))
1795 if (sym
->ts
.type
!= BT_UNKNOWN
&& !sym
->attr
.implicit_type
)
1797 gfc_error ("Intrinsic subroutine %qs at %L shall not have a type"
1798 " specifier", sym
->name
, &sym
->declared_at
);
1802 if (!sym
->attr
.subroutine
&&
1803 !gfc_add_subroutine(&sym
->attr
, sym
->name
, loc
))
1808 gfc_error ("%qs declared INTRINSIC at %L does not exist", sym
->name
,
1813 gfc_copy_formal_args_intr (sym
, isym
, NULL
);
1815 sym
->attr
.pure
= isym
->pure
;
1816 sym
->attr
.elemental
= isym
->elemental
;
1818 /* Check it is actually available in the standard settings. */
1819 if (!gfc_check_intrinsic_standard (isym
, &symstd
, false, sym
->declared_at
))
1821 gfc_error ("The intrinsic %qs declared INTRINSIC at %L is not "
1822 "available in the current standard settings but %s. Use "
1823 "an appropriate %<-std=*%> option or enable "
1824 "%<-fall-intrinsics%> in order to use it.",
1825 sym
->name
, &sym
->declared_at
, symstd
);
1833 /* Resolve a procedure expression, like passing it to a called procedure or as
1834 RHS for a procedure pointer assignment. */
1837 resolve_procedure_expression (gfc_expr
* expr
)
1841 if (expr
->expr_type
!= EXPR_VARIABLE
)
1843 gcc_assert (expr
->symtree
);
1845 sym
= expr
->symtree
->n
.sym
;
1847 if (sym
->attr
.intrinsic
)
1848 gfc_resolve_intrinsic (sym
, &expr
->where
);
1850 if (sym
->attr
.flavor
!= FL_PROCEDURE
1851 || (sym
->attr
.function
&& sym
->result
== sym
))
1854 /* A non-RECURSIVE procedure that is used as procedure expression within its
1855 own body is in danger of being called recursively. */
1856 if (is_illegal_recursion (sym
, gfc_current_ns
))
1857 gfc_warning (0, "Non-RECURSIVE procedure %qs at %L is possibly calling"
1858 " itself recursively. Declare it RECURSIVE or use"
1859 " %<-frecursive%>", sym
->name
, &expr
->where
);
1865 /* Resolve an actual argument list. Most of the time, this is just
1866 resolving the expressions in the list.
1867 The exception is that we sometimes have to decide whether arguments
1868 that look like procedure arguments are really simple variable
1872 resolve_actual_arglist (gfc_actual_arglist
*arg
, procedure_type ptype
,
1873 bool no_formal_args
)
1876 gfc_symtree
*parent_st
;
1878 gfc_component
*comp
;
1879 int save_need_full_assumed_size
;
1880 bool return_value
= false;
1881 bool actual_arg_sav
= actual_arg
, first_actual_arg_sav
= first_actual_arg
;
1884 first_actual_arg
= true;
1886 for (; arg
; arg
= arg
->next
)
1891 /* Check the label is a valid branching target. */
1894 if (arg
->label
->defined
== ST_LABEL_UNKNOWN
)
1896 gfc_error ("Label %d referenced at %L is never defined",
1897 arg
->label
->value
, &arg
->label
->where
);
1901 first_actual_arg
= false;
1905 if (e
->expr_type
== EXPR_VARIABLE
1906 && e
->symtree
->n
.sym
->attr
.generic
1908 && count_specific_procs (e
) != 1)
1911 if (e
->ts
.type
!= BT_PROCEDURE
)
1913 save_need_full_assumed_size
= need_full_assumed_size
;
1914 if (e
->expr_type
!= EXPR_VARIABLE
)
1915 need_full_assumed_size
= 0;
1916 if (!gfc_resolve_expr (e
))
1918 need_full_assumed_size
= save_need_full_assumed_size
;
1922 /* See if the expression node should really be a variable reference. */
1924 sym
= e
->symtree
->n
.sym
;
1926 if (sym
->attr
.flavor
== FL_PROCEDURE
1927 || sym
->attr
.intrinsic
1928 || sym
->attr
.external
)
1932 /* If a procedure is not already determined to be something else
1933 check if it is intrinsic. */
1934 if (gfc_is_intrinsic (sym
, sym
->attr
.subroutine
, e
->where
))
1935 sym
->attr
.intrinsic
= 1;
1937 if (sym
->attr
.proc
== PROC_ST_FUNCTION
)
1939 gfc_error ("Statement function %qs at %L is not allowed as an "
1940 "actual argument", sym
->name
, &e
->where
);
1943 actual_ok
= gfc_intrinsic_actual_ok (sym
->name
,
1944 sym
->attr
.subroutine
);
1945 if (sym
->attr
.intrinsic
&& actual_ok
== 0)
1947 gfc_error ("Intrinsic %qs at %L is not allowed as an "
1948 "actual argument", sym
->name
, &e
->where
);
1951 if (sym
->attr
.contained
&& !sym
->attr
.use_assoc
1952 && sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
)
1954 if (!gfc_notify_std (GFC_STD_F2008
, "Internal procedure %qs is"
1955 " used as actual argument at %L",
1956 sym
->name
, &e
->where
))
1960 if (sym
->attr
.elemental
&& !sym
->attr
.intrinsic
)
1962 gfc_error ("ELEMENTAL non-INTRINSIC procedure %qs is not "
1963 "allowed as an actual argument at %L", sym
->name
,
1967 /* Check if a generic interface has a specific procedure
1968 with the same name before emitting an error. */
1969 if (sym
->attr
.generic
&& count_specific_procs (e
) != 1)
1972 /* Just in case a specific was found for the expression. */
1973 sym
= e
->symtree
->n
.sym
;
1975 /* If the symbol is the function that names the current (or
1976 parent) scope, then we really have a variable reference. */
1978 if (gfc_is_function_return_value (sym
, sym
->ns
))
1981 /* If all else fails, see if we have a specific intrinsic. */
1982 if (sym
->ts
.type
== BT_UNKNOWN
&& sym
->attr
.intrinsic
)
1984 gfc_intrinsic_sym
*isym
;
1986 isym
= gfc_find_function (sym
->name
);
1987 if (isym
== NULL
|| !isym
->specific
)
1989 gfc_error ("Unable to find a specific INTRINSIC procedure "
1990 "for the reference %qs at %L", sym
->name
,
1995 sym
->attr
.intrinsic
= 1;
1996 sym
->attr
.function
= 1;
1999 if (!gfc_resolve_expr (e
))
2004 /* See if the name is a module procedure in a parent unit. */
2006 if (was_declared (sym
) || sym
->ns
->parent
== NULL
)
2009 if (gfc_find_sym_tree (sym
->name
, sym
->ns
->parent
, 1, &parent_st
))
2011 gfc_error ("Symbol %qs at %L is ambiguous", sym
->name
, &e
->where
);
2015 if (parent_st
== NULL
)
2018 sym
= parent_st
->n
.sym
;
2019 e
->symtree
= parent_st
; /* Point to the right thing. */
2021 if (sym
->attr
.flavor
== FL_PROCEDURE
2022 || sym
->attr
.intrinsic
2023 || sym
->attr
.external
)
2025 if (!gfc_resolve_expr (e
))
2031 e
->expr_type
= EXPR_VARIABLE
;
2033 if ((sym
->as
!= NULL
&& sym
->ts
.type
!= BT_CLASS
)
2034 || (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
2035 && CLASS_DATA (sym
)->as
))
2037 e
->rank
= sym
->ts
.type
== BT_CLASS
2038 ? CLASS_DATA (sym
)->as
->rank
: sym
->as
->rank
;
2039 e
->ref
= gfc_get_ref ();
2040 e
->ref
->type
= REF_ARRAY
;
2041 e
->ref
->u
.ar
.type
= AR_FULL
;
2042 e
->ref
->u
.ar
.as
= sym
->ts
.type
== BT_CLASS
2043 ? CLASS_DATA (sym
)->as
: sym
->as
;
2046 /* Expressions are assigned a default ts.type of BT_PROCEDURE in
2047 primary.c (match_actual_arg). If above code determines that it
2048 is a variable instead, it needs to be resolved as it was not
2049 done at the beginning of this function. */
2050 save_need_full_assumed_size
= need_full_assumed_size
;
2051 if (e
->expr_type
!= EXPR_VARIABLE
)
2052 need_full_assumed_size
= 0;
2053 if (!gfc_resolve_expr (e
))
2055 need_full_assumed_size
= save_need_full_assumed_size
;
2058 /* Check argument list functions %VAL, %LOC and %REF. There is
2059 nothing to do for %REF. */
2060 if (arg
->name
&& arg
->name
[0] == '%')
2062 if (strcmp ("%VAL", arg
->name
) == 0)
2064 if (e
->ts
.type
== BT_CHARACTER
|| e
->ts
.type
== BT_DERIVED
)
2066 gfc_error ("By-value argument at %L is not of numeric "
2073 gfc_error ("By-value argument at %L cannot be an array or "
2074 "an array section", &e
->where
);
2078 /* Intrinsics are still PROC_UNKNOWN here. However,
2079 since same file external procedures are not resolvable
2080 in gfortran, it is a good deal easier to leave them to
2082 if (ptype
!= PROC_UNKNOWN
2083 && ptype
!= PROC_DUMMY
2084 && ptype
!= PROC_EXTERNAL
2085 && ptype
!= PROC_MODULE
)
2087 gfc_error ("By-value argument at %L is not allowed "
2088 "in this context", &e
->where
);
2093 /* Statement functions have already been excluded above. */
2094 else if (strcmp ("%LOC", arg
->name
) == 0
2095 && e
->ts
.type
== BT_PROCEDURE
)
2097 if (e
->symtree
->n
.sym
->attr
.proc
== PROC_INTERNAL
)
2099 gfc_error ("Passing internal procedure at %L by location "
2100 "not allowed", &e
->where
);
2106 comp
= gfc_get_proc_ptr_comp(e
);
2107 if (e
->expr_type
== EXPR_VARIABLE
2108 && comp
&& comp
->attr
.elemental
)
2110 gfc_error ("ELEMENTAL procedure pointer component %qs is not "
2111 "allowed as an actual argument at %L", comp
->name
,
2115 /* Fortran 2008, C1237. */
2116 if (e
->expr_type
== EXPR_VARIABLE
&& gfc_is_coindexed (e
)
2117 && gfc_has_ultimate_pointer (e
))
2119 gfc_error ("Coindexed actual argument at %L with ultimate pointer "
2120 "component", &e
->where
);
2124 first_actual_arg
= false;
2127 return_value
= true;
2130 actual_arg
= actual_arg_sav
;
2131 first_actual_arg
= first_actual_arg_sav
;
2133 return return_value
;
2137 /* Do the checks of the actual argument list that are specific to elemental
2138 procedures. If called with c == NULL, we have a function, otherwise if
2139 expr == NULL, we have a subroutine. */
2142 resolve_elemental_actual (gfc_expr
*expr
, gfc_code
*c
)
2144 gfc_actual_arglist
*arg0
;
2145 gfc_actual_arglist
*arg
;
2146 gfc_symbol
*esym
= NULL
;
2147 gfc_intrinsic_sym
*isym
= NULL
;
2149 gfc_intrinsic_arg
*iformal
= NULL
;
2150 gfc_formal_arglist
*eformal
= NULL
;
2151 bool formal_optional
= false;
2152 bool set_by_optional
= false;
2156 /* Is this an elemental procedure? */
2157 if (expr
&& expr
->value
.function
.actual
!= NULL
)
2159 if (expr
->value
.function
.esym
!= NULL
2160 && expr
->value
.function
.esym
->attr
.elemental
)
2162 arg0
= expr
->value
.function
.actual
;
2163 esym
= expr
->value
.function
.esym
;
2165 else if (expr
->value
.function
.isym
!= NULL
2166 && expr
->value
.function
.isym
->elemental
)
2168 arg0
= expr
->value
.function
.actual
;
2169 isym
= expr
->value
.function
.isym
;
2174 else if (c
&& c
->ext
.actual
!= NULL
)
2176 arg0
= c
->ext
.actual
;
2178 if (c
->resolved_sym
)
2179 esym
= c
->resolved_sym
;
2181 esym
= c
->symtree
->n
.sym
;
2184 if (!esym
->attr
.elemental
)
2190 /* The rank of an elemental is the rank of its array argument(s). */
2191 for (arg
= arg0
; arg
; arg
= arg
->next
)
2193 if (arg
->expr
!= NULL
&& arg
->expr
->rank
!= 0)
2195 rank
= arg
->expr
->rank
;
2196 if (arg
->expr
->expr_type
== EXPR_VARIABLE
2197 && arg
->expr
->symtree
->n
.sym
->attr
.optional
)
2198 set_by_optional
= true;
2200 /* Function specific; set the result rank and shape. */
2204 if (!expr
->shape
&& arg
->expr
->shape
)
2206 expr
->shape
= gfc_get_shape (rank
);
2207 for (i
= 0; i
< rank
; i
++)
2208 mpz_init_set (expr
->shape
[i
], arg
->expr
->shape
[i
]);
2215 /* If it is an array, it shall not be supplied as an actual argument
2216 to an elemental procedure unless an array of the same rank is supplied
2217 as an actual argument corresponding to a nonoptional dummy argument of
2218 that elemental procedure(12.4.1.5). */
2219 formal_optional
= false;
2221 iformal
= isym
->formal
;
2223 eformal
= esym
->formal
;
2225 for (arg
= arg0
; arg
; arg
= arg
->next
)
2229 if (eformal
->sym
&& eformal
->sym
->attr
.optional
)
2230 formal_optional
= true;
2231 eformal
= eformal
->next
;
2233 else if (isym
&& iformal
)
2235 if (iformal
->optional
)
2236 formal_optional
= true;
2237 iformal
= iformal
->next
;
2240 formal_optional
= true;
2242 if (pedantic
&& arg
->expr
!= NULL
2243 && arg
->expr
->expr_type
== EXPR_VARIABLE
2244 && arg
->expr
->symtree
->n
.sym
->attr
.optional
2247 && (set_by_optional
|| arg
->expr
->rank
!= rank
)
2248 && !(isym
&& isym
->id
== GFC_ISYM_CONVERSION
))
2250 gfc_warning (OPT_Wpedantic
,
2251 "%qs at %L is an array and OPTIONAL; IF IT IS "
2252 "MISSING, it cannot be the actual argument of an "
2253 "ELEMENTAL procedure unless there is a non-optional "
2254 "argument with the same rank (12.4.1.5)",
2255 arg
->expr
->symtree
->n
.sym
->name
, &arg
->expr
->where
);
2259 for (arg
= arg0
; arg
; arg
= arg
->next
)
2261 if (arg
->expr
== NULL
|| arg
->expr
->rank
== 0)
2264 /* Being elemental, the last upper bound of an assumed size array
2265 argument must be present. */
2266 if (resolve_assumed_size_actual (arg
->expr
))
2269 /* Elemental procedure's array actual arguments must conform. */
2272 if (!gfc_check_conformance (arg
->expr
, e
, "elemental procedure"))
2279 /* INTENT(OUT) is only allowed for subroutines; if any actual argument
2280 is an array, the intent inout/out variable needs to be also an array. */
2281 if (rank
> 0 && esym
&& expr
== NULL
)
2282 for (eformal
= esym
->formal
, arg
= arg0
; arg
&& eformal
;
2283 arg
= arg
->next
, eformal
= eformal
->next
)
2284 if ((eformal
->sym
->attr
.intent
== INTENT_OUT
2285 || eformal
->sym
->attr
.intent
== INTENT_INOUT
)
2286 && arg
->expr
&& arg
->expr
->rank
== 0)
2288 gfc_error ("Actual argument at %L for INTENT(%s) dummy %qs of "
2289 "ELEMENTAL subroutine %qs is a scalar, but another "
2290 "actual argument is an array", &arg
->expr
->where
,
2291 (eformal
->sym
->attr
.intent
== INTENT_OUT
) ? "OUT"
2292 : "INOUT", eformal
->sym
->name
, esym
->name
);
2299 /* This function does the checking of references to global procedures
2300 as defined in sections 18.1 and 14.1, respectively, of the Fortran
2301 77 and 95 standards. It checks for a gsymbol for the name, making
2302 one if it does not already exist. If it already exists, then the
2303 reference being resolved must correspond to the type of gsymbol.
2304 Otherwise, the new symbol is equipped with the attributes of the
2305 reference. The corresponding code that is called in creating
2306 global entities is parse.c.
2308 In addition, for all but -std=legacy, the gsymbols are used to
2309 check the interfaces of external procedures from the same file.
2310 The namespace of the gsymbol is resolved and then, once this is
2311 done the interface is checked. */
2315 not_in_recursive (gfc_symbol
*sym
, gfc_namespace
*gsym_ns
)
2317 if (!gsym_ns
->proc_name
->attr
.recursive
)
2320 if (sym
->ns
== gsym_ns
)
2323 if (sym
->ns
->parent
&& sym
->ns
->parent
== gsym_ns
)
2330 not_entry_self_reference (gfc_symbol
*sym
, gfc_namespace
*gsym_ns
)
2332 if (gsym_ns
->entries
)
2334 gfc_entry_list
*entry
= gsym_ns
->entries
;
2336 for (; entry
; entry
= entry
->next
)
2338 if (strcmp (sym
->name
, entry
->sym
->name
) == 0)
2340 if (strcmp (gsym_ns
->proc_name
->name
,
2341 sym
->ns
->proc_name
->name
) == 0)
2345 && strcmp (gsym_ns
->proc_name
->name
,
2346 sym
->ns
->parent
->proc_name
->name
) == 0)
2355 /* Check for the requirement of an explicit interface. F08:12.4.2.2. */
2358 gfc_explicit_interface_required (gfc_symbol
*sym
, char *errmsg
, int err_len
)
2360 gfc_formal_arglist
*arg
= gfc_sym_get_dummy_args (sym
);
2362 for ( ; arg
; arg
= arg
->next
)
2367 if (arg
->sym
->attr
.allocatable
) /* (2a) */
2369 strncpy (errmsg
, _("allocatable argument"), err_len
);
2372 else if (arg
->sym
->attr
.asynchronous
)
2374 strncpy (errmsg
, _("asynchronous argument"), err_len
);
2377 else if (arg
->sym
->attr
.optional
)
2379 strncpy (errmsg
, _("optional argument"), err_len
);
2382 else if (arg
->sym
->attr
.pointer
)
2384 strncpy (errmsg
, _("pointer argument"), err_len
);
2387 else if (arg
->sym
->attr
.target
)
2389 strncpy (errmsg
, _("target argument"), err_len
);
2392 else if (arg
->sym
->attr
.value
)
2394 strncpy (errmsg
, _("value argument"), err_len
);
2397 else if (arg
->sym
->attr
.volatile_
)
2399 strncpy (errmsg
, _("volatile argument"), err_len
);
2402 else if (arg
->sym
->as
&& arg
->sym
->as
->type
== AS_ASSUMED_SHAPE
) /* (2b) */
2404 strncpy (errmsg
, _("assumed-shape argument"), err_len
);
2407 else if (arg
->sym
->as
&& arg
->sym
->as
->type
== AS_ASSUMED_RANK
) /* TS 29113, 6.2. */
2409 strncpy (errmsg
, _("assumed-rank argument"), err_len
);
2412 else if (arg
->sym
->attr
.codimension
) /* (2c) */
2414 strncpy (errmsg
, _("coarray argument"), err_len
);
2417 else if (false) /* (2d) TODO: parametrized derived type */
2419 strncpy (errmsg
, _("parametrized derived type argument"), err_len
);
2422 else if (arg
->sym
->ts
.type
== BT_CLASS
) /* (2e) */
2424 strncpy (errmsg
, _("polymorphic argument"), err_len
);
2427 else if (arg
->sym
->attr
.ext_attr
& (1 << EXT_ATTR_NO_ARG_CHECK
))
2429 strncpy (errmsg
, _("NO_ARG_CHECK attribute"), err_len
);
2432 else if (arg
->sym
->ts
.type
== BT_ASSUMED
)
2434 /* As assumed-type is unlimited polymorphic (cf. above).
2435 See also TS 29113, Note 6.1. */
2436 strncpy (errmsg
, _("assumed-type argument"), err_len
);
2441 if (sym
->attr
.function
)
2443 gfc_symbol
*res
= sym
->result
? sym
->result
: sym
;
2445 if (res
->attr
.dimension
) /* (3a) */
2447 strncpy (errmsg
, _("array result"), err_len
);
2450 else if (res
->attr
.pointer
|| res
->attr
.allocatable
) /* (3b) */
2452 strncpy (errmsg
, _("pointer or allocatable result"), err_len
);
2455 else if (res
->ts
.type
== BT_CHARACTER
&& res
->ts
.u
.cl
2456 && res
->ts
.u
.cl
->length
2457 && res
->ts
.u
.cl
->length
->expr_type
!= EXPR_CONSTANT
) /* (3c) */
2459 strncpy (errmsg
, _("result with non-constant character length"), err_len
);
2464 if (sym
->attr
.elemental
&& !sym
->attr
.intrinsic
) /* (4) */
2466 strncpy (errmsg
, _("elemental procedure"), err_len
);
2469 else if (sym
->attr
.is_bind_c
) /* (5) */
2471 strncpy (errmsg
, _("bind(c) procedure"), err_len
);
2480 resolve_global_procedure (gfc_symbol
*sym
, locus
*where
,
2481 gfc_actual_arglist
**actual
, int sub
)
2485 enum gfc_symbol_type type
;
2488 type
= sub
? GSYM_SUBROUTINE
: GSYM_FUNCTION
;
2490 gsym
= gfc_get_gsymbol (sym
->binding_label
? sym
->binding_label
: sym
->name
);
2492 if ((gsym
->type
!= GSYM_UNKNOWN
&& gsym
->type
!= type
))
2493 gfc_global_used (gsym
, where
);
2495 if ((sym
->attr
.if_source
== IFSRC_UNKNOWN
2496 || sym
->attr
.if_source
== IFSRC_IFBODY
)
2497 && gsym
->type
!= GSYM_UNKNOWN
2498 && !gsym
->binding_label
2500 && gsym
->ns
->resolved
!= -1
2501 && gsym
->ns
->proc_name
2502 && not_in_recursive (sym
, gsym
->ns
)
2503 && not_entry_self_reference (sym
, gsym
->ns
))
2505 gfc_symbol
*def_sym
;
2507 /* Resolve the gsymbol namespace if needed. */
2508 if (!gsym
->ns
->resolved
)
2510 gfc_symbol
*old_dt_list
;
2512 /* Stash away derived types so that the backend_decls do not
2514 old_dt_list
= gfc_derived_types
;
2515 gfc_derived_types
= NULL
;
2517 gfc_resolve (gsym
->ns
);
2519 /* Store the new derived types with the global namespace. */
2520 if (gfc_derived_types
)
2521 gsym
->ns
->derived_types
= gfc_derived_types
;
2523 /* Restore the derived types of this namespace. */
2524 gfc_derived_types
= old_dt_list
;
2527 /* Make sure that translation for the gsymbol occurs before
2528 the procedure currently being resolved. */
2529 ns
= gfc_global_ns_list
;
2530 for (; ns
&& ns
!= gsym
->ns
; ns
= ns
->sibling
)
2532 if (ns
->sibling
== gsym
->ns
)
2534 ns
->sibling
= gsym
->ns
->sibling
;
2535 gsym
->ns
->sibling
= gfc_global_ns_list
;
2536 gfc_global_ns_list
= gsym
->ns
;
2541 def_sym
= gsym
->ns
->proc_name
;
2543 /* This can happen if a binding name has been specified. */
2544 if (gsym
->binding_label
&& gsym
->sym_name
!= def_sym
->name
)
2545 gfc_find_symbol (gsym
->sym_name
, gsym
->ns
, 0, &def_sym
);
2547 if (def_sym
->attr
.entry_master
)
2549 gfc_entry_list
*entry
;
2550 for (entry
= gsym
->ns
->entries
; entry
; entry
= entry
->next
)
2551 if (strcmp (entry
->sym
->name
, sym
->name
) == 0)
2553 def_sym
= entry
->sym
;
2558 if (sym
->attr
.function
&& !gfc_compare_types (&sym
->ts
, &def_sym
->ts
))
2560 gfc_error ("Return type mismatch of function %qs at %L (%s/%s)",
2561 sym
->name
, &sym
->declared_at
, gfc_typename (&sym
->ts
),
2562 gfc_typename (&def_sym
->ts
));
2566 if (sym
->attr
.if_source
== IFSRC_UNKNOWN
2567 && gfc_explicit_interface_required (def_sym
, reason
, sizeof(reason
)))
2569 gfc_error ("Explicit interface required for %qs at %L: %s",
2570 sym
->name
, &sym
->declared_at
, reason
);
2574 if (!pedantic
&& (gfc_option
.allow_std
& GFC_STD_GNU
))
2575 /* Turn erros into warnings with -std=gnu and -std=legacy. */
2576 gfc_errors_to_warnings (true);
2578 if (!gfc_compare_interfaces (sym
, def_sym
, sym
->name
, 0, 1,
2579 reason
, sizeof(reason
), NULL
, NULL
))
2581 gfc_error_opt (OPT_Wargument_mismatch
,
2582 "Interface mismatch in global procedure %qs at %L:"
2583 " %s", sym
->name
, &sym
->declared_at
, reason
);
2588 || ((gfc_option
.warn_std
& GFC_STD_LEGACY
)
2589 && !(gfc_option
.warn_std
& GFC_STD_GNU
)))
2590 gfc_errors_to_warnings (true);
2592 if (sym
->attr
.if_source
!= IFSRC_IFBODY
)
2593 gfc_procedure_use (def_sym
, actual
, where
);
2597 gfc_errors_to_warnings (false);
2599 if (gsym
->type
== GSYM_UNKNOWN
)
2602 gsym
->where
= *where
;
2609 /************* Function resolution *************/
2611 /* Resolve a function call known to be generic.
2612 Section 14.1.2.4.1. */
2615 resolve_generic_f0 (gfc_expr
*expr
, gfc_symbol
*sym
)
2619 if (sym
->attr
.generic
)
2621 s
= gfc_search_interface (sym
->generic
, 0, &expr
->value
.function
.actual
);
2624 expr
->value
.function
.name
= s
->name
;
2625 expr
->value
.function
.esym
= s
;
2627 if (s
->ts
.type
!= BT_UNKNOWN
)
2629 else if (s
->result
!= NULL
&& s
->result
->ts
.type
!= BT_UNKNOWN
)
2630 expr
->ts
= s
->result
->ts
;
2633 expr
->rank
= s
->as
->rank
;
2634 else if (s
->result
!= NULL
&& s
->result
->as
!= NULL
)
2635 expr
->rank
= s
->result
->as
->rank
;
2637 gfc_set_sym_referenced (expr
->value
.function
.esym
);
2642 /* TODO: Need to search for elemental references in generic
2646 if (sym
->attr
.intrinsic
)
2647 return gfc_intrinsic_func_interface (expr
, 0);
2654 resolve_generic_f (gfc_expr
*expr
)
2658 gfc_interface
*intr
= NULL
;
2660 sym
= expr
->symtree
->n
.sym
;
2664 m
= resolve_generic_f0 (expr
, sym
);
2667 else if (m
== MATCH_ERROR
)
2672 for (intr
= sym
->generic
; intr
; intr
= intr
->next
)
2673 if (gfc_fl_struct (intr
->sym
->attr
.flavor
))
2676 if (sym
->ns
->parent
== NULL
)
2678 gfc_find_symbol (sym
->name
, sym
->ns
->parent
, 1, &sym
);
2682 if (!generic_sym (sym
))
2686 /* Last ditch attempt. See if the reference is to an intrinsic
2687 that possesses a matching interface. 14.1.2.4 */
2688 if (sym
&& !intr
&& !gfc_is_intrinsic (sym
, 0, expr
->where
))
2690 if (gfc_init_expr_flag
)
2691 gfc_error ("Function %qs in initialization expression at %L "
2692 "must be an intrinsic function",
2693 expr
->symtree
->n
.sym
->name
, &expr
->where
);
2695 gfc_error ("There is no specific function for the generic %qs "
2696 "at %L", expr
->symtree
->n
.sym
->name
, &expr
->where
);
2702 if (!gfc_convert_to_structure_constructor (expr
, intr
->sym
, NULL
,
2705 if (!gfc_use_derived (expr
->ts
.u
.derived
))
2707 return resolve_structure_cons (expr
, 0);
2710 m
= gfc_intrinsic_func_interface (expr
, 0);
2715 gfc_error ("Generic function %qs at %L is not consistent with a "
2716 "specific intrinsic interface", expr
->symtree
->n
.sym
->name
,
2723 /* Resolve a function call known to be specific. */
2726 resolve_specific_f0 (gfc_symbol
*sym
, gfc_expr
*expr
)
2730 if (sym
->attr
.external
|| sym
->attr
.if_source
== IFSRC_IFBODY
)
2732 if (sym
->attr
.dummy
)
2734 sym
->attr
.proc
= PROC_DUMMY
;
2738 sym
->attr
.proc
= PROC_EXTERNAL
;
2742 if (sym
->attr
.proc
== PROC_MODULE
2743 || sym
->attr
.proc
== PROC_ST_FUNCTION
2744 || sym
->attr
.proc
== PROC_INTERNAL
)
2747 if (sym
->attr
.intrinsic
)
2749 m
= gfc_intrinsic_func_interface (expr
, 1);
2753 gfc_error ("Function %qs at %L is INTRINSIC but is not compatible "
2754 "with an intrinsic", sym
->name
, &expr
->where
);
2762 gfc_procedure_use (sym
, &expr
->value
.function
.actual
, &expr
->where
);
2765 expr
->ts
= sym
->result
->ts
;
2768 expr
->value
.function
.name
= sym
->name
;
2769 expr
->value
.function
.esym
= sym
;
2770 /* Prevent crash when sym->ts.u.derived->components is not set due to previous
2772 if (sym
->ts
.type
== BT_CLASS
&& !CLASS_DATA (sym
))
2774 if (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
)->as
)
2775 expr
->rank
= CLASS_DATA (sym
)->as
->rank
;
2776 else if (sym
->as
!= NULL
)
2777 expr
->rank
= sym
->as
->rank
;
2784 resolve_specific_f (gfc_expr
*expr
)
2789 sym
= expr
->symtree
->n
.sym
;
2793 m
= resolve_specific_f0 (sym
, expr
);
2796 if (m
== MATCH_ERROR
)
2799 if (sym
->ns
->parent
== NULL
)
2802 gfc_find_symbol (sym
->name
, sym
->ns
->parent
, 1, &sym
);
2808 gfc_error ("Unable to resolve the specific function %qs at %L",
2809 expr
->symtree
->n
.sym
->name
, &expr
->where
);
2814 /* Recursively append candidate SYM to CANDIDATES. Store the number of
2815 candidates in CANDIDATES_LEN. */
2818 lookup_function_fuzzy_find_candidates (gfc_symtree
*sym
,
2820 size_t &candidates_len
)
2826 if ((sym
->n
.sym
->ts
.type
!= BT_UNKNOWN
|| sym
->n
.sym
->attr
.external
)
2827 && sym
->n
.sym
->attr
.flavor
== FL_PROCEDURE
)
2828 vec_push (candidates
, candidates_len
, sym
->name
);
2832 lookup_function_fuzzy_find_candidates (p
, candidates
, candidates_len
);
2836 lookup_function_fuzzy_find_candidates (p
, candidates
, candidates_len
);
2840 /* Lookup function FN fuzzily, taking names in SYMROOT into account. */
2843 gfc_lookup_function_fuzzy (const char *fn
, gfc_symtree
*symroot
)
2845 char **candidates
= NULL
;
2846 size_t candidates_len
= 0;
2847 lookup_function_fuzzy_find_candidates (symroot
, candidates
, candidates_len
);
2848 return gfc_closest_fuzzy_match (fn
, candidates
);
2852 /* Resolve a procedure call not known to be generic nor specific. */
2855 resolve_unknown_f (gfc_expr
*expr
)
2860 sym
= expr
->symtree
->n
.sym
;
2862 if (sym
->attr
.dummy
)
2864 sym
->attr
.proc
= PROC_DUMMY
;
2865 expr
->value
.function
.name
= sym
->name
;
2869 /* See if we have an intrinsic function reference. */
2871 if (gfc_is_intrinsic (sym
, 0, expr
->where
))
2873 if (gfc_intrinsic_func_interface (expr
, 1) == MATCH_YES
)
2878 /* The reference is to an external name. */
2880 sym
->attr
.proc
= PROC_EXTERNAL
;
2881 expr
->value
.function
.name
= sym
->name
;
2882 expr
->value
.function
.esym
= expr
->symtree
->n
.sym
;
2884 if (sym
->as
!= NULL
)
2885 expr
->rank
= sym
->as
->rank
;
2887 /* Type of the expression is either the type of the symbol or the
2888 default type of the symbol. */
2891 gfc_procedure_use (sym
, &expr
->value
.function
.actual
, &expr
->where
);
2893 if (sym
->ts
.type
!= BT_UNKNOWN
)
2897 ts
= gfc_get_default_type (sym
->name
, sym
->ns
);
2899 if (ts
->type
== BT_UNKNOWN
)
2902 = gfc_lookup_function_fuzzy (sym
->name
, sym
->ns
->sym_root
);
2904 gfc_error ("Function %qs at %L has no IMPLICIT type"
2905 "; did you mean %qs?",
2906 sym
->name
, &expr
->where
, guessed
);
2908 gfc_error ("Function %qs at %L has no IMPLICIT type",
2909 sym
->name
, &expr
->where
);
2920 /* Return true, if the symbol is an external procedure. */
2922 is_external_proc (gfc_symbol
*sym
)
2924 if (!sym
->attr
.dummy
&& !sym
->attr
.contained
2925 && !gfc_is_intrinsic (sym
, sym
->attr
.subroutine
, sym
->declared_at
)
2926 && sym
->attr
.proc
!= PROC_ST_FUNCTION
2927 && !sym
->attr
.proc_pointer
2928 && !sym
->attr
.use_assoc
2936 /* Figure out if a function reference is pure or not. Also set the name
2937 of the function for a potential error message. Return nonzero if the
2938 function is PURE, zero if not. */
2940 pure_stmt_function (gfc_expr
*, gfc_symbol
*);
2943 gfc_pure_function (gfc_expr
*e
, const char **name
)
2946 gfc_component
*comp
;
2950 if (e
->symtree
!= NULL
2951 && e
->symtree
->n
.sym
!= NULL
2952 && e
->symtree
->n
.sym
->attr
.proc
== PROC_ST_FUNCTION
)
2953 return pure_stmt_function (e
, e
->symtree
->n
.sym
);
2955 comp
= gfc_get_proc_ptr_comp (e
);
2958 pure
= gfc_pure (comp
->ts
.interface
);
2961 else if (e
->value
.function
.esym
)
2963 pure
= gfc_pure (e
->value
.function
.esym
);
2964 *name
= e
->value
.function
.esym
->name
;
2966 else if (e
->value
.function
.isym
)
2968 pure
= e
->value
.function
.isym
->pure
2969 || e
->value
.function
.isym
->elemental
;
2970 *name
= e
->value
.function
.isym
->name
;
2974 /* Implicit functions are not pure. */
2976 *name
= e
->value
.function
.name
;
2983 /* Check if the expression is a reference to an implicitly pure function. */
2986 gfc_implicit_pure_function (gfc_expr
*e
)
2988 gfc_component
*comp
= gfc_get_proc_ptr_comp (e
);
2990 return gfc_implicit_pure (comp
->ts
.interface
);
2991 else if (e
->value
.function
.esym
)
2992 return gfc_implicit_pure (e
->value
.function
.esym
);
2999 impure_stmt_fcn (gfc_expr
*e
, gfc_symbol
*sym
,
3000 int *f ATTRIBUTE_UNUSED
)
3004 /* Don't bother recursing into other statement functions
3005 since they will be checked individually for purity. */
3006 if (e
->expr_type
!= EXPR_FUNCTION
3008 || e
->symtree
->n
.sym
== sym
3009 || e
->symtree
->n
.sym
->attr
.proc
== PROC_ST_FUNCTION
)
3012 return gfc_pure_function (e
, &name
) ? false : true;
3017 pure_stmt_function (gfc_expr
*e
, gfc_symbol
*sym
)
3019 return gfc_traverse_expr (e
, sym
, impure_stmt_fcn
, 0) ? 0 : 1;
3023 /* Check if an impure function is allowed in the current context. */
3025 static bool check_pure_function (gfc_expr
*e
)
3027 const char *name
= NULL
;
3028 if (!gfc_pure_function (e
, &name
) && name
)
3032 gfc_error ("Reference to impure function %qs at %L inside a "
3033 "FORALL %s", name
, &e
->where
,
3034 forall_flag
== 2 ? "mask" : "block");
3037 else if (gfc_do_concurrent_flag
)
3039 gfc_error ("Reference to impure function %qs at %L inside a "
3040 "DO CONCURRENT %s", name
, &e
->where
,
3041 gfc_do_concurrent_flag
== 2 ? "mask" : "block");
3044 else if (gfc_pure (NULL
))
3046 gfc_error ("Reference to impure function %qs at %L "
3047 "within a PURE procedure", name
, &e
->where
);
3050 if (!gfc_implicit_pure_function (e
))
3051 gfc_unset_implicit_pure (NULL
);
3057 /* Update current procedure's array_outer_dependency flag, considering
3058 a call to procedure SYM. */
3061 update_current_proc_array_outer_dependency (gfc_symbol
*sym
)
3063 /* Check to see if this is a sibling function that has not yet
3065 gfc_namespace
*sibling
= gfc_current_ns
->sibling
;
3066 for (; sibling
; sibling
= sibling
->sibling
)
3068 if (sibling
->proc_name
== sym
)
3070 gfc_resolve (sibling
);
3075 /* If SYM has references to outer arrays, so has the procedure calling
3076 SYM. If SYM is a procedure pointer, we can assume the worst. */
3077 if ((sym
->attr
.array_outer_dependency
|| sym
->attr
.proc_pointer
)
3078 && gfc_current_ns
->proc_name
)
3079 gfc_current_ns
->proc_name
->attr
.array_outer_dependency
= 1;
3083 /* Resolve a function call, which means resolving the arguments, then figuring
3084 out which entity the name refers to. */
3087 resolve_function (gfc_expr
*expr
)
3089 gfc_actual_arglist
*arg
;
3093 procedure_type p
= PROC_INTRINSIC
;
3094 bool no_formal_args
;
3098 sym
= expr
->symtree
->n
.sym
;
3100 /* If this is a procedure pointer component, it has already been resolved. */
3101 if (gfc_is_proc_ptr_comp (expr
))
3104 /* Avoid re-resolving the arguments of caf_get, which can lead to inserting
3106 if (sym
&& sym
->attr
.intrinsic
3107 && (sym
->intmod_sym_id
== GFC_ISYM_CAF_GET
3108 || sym
->intmod_sym_id
== GFC_ISYM_CAF_SEND
))
3111 if (sym
&& sym
->attr
.intrinsic
3112 && !gfc_resolve_intrinsic (sym
, &expr
->where
))
3115 if (sym
&& (sym
->attr
.flavor
== FL_VARIABLE
|| sym
->attr
.subroutine
))
3117 gfc_error ("%qs at %L is not a function", sym
->name
, &expr
->where
);
3121 /* If this is a deferred TBP with an abstract interface (which may
3122 of course be referenced), expr->value.function.esym will be set. */
3123 if (sym
&& sym
->attr
.abstract
&& !expr
->value
.function
.esym
)
3125 gfc_error ("ABSTRACT INTERFACE %qs must not be referenced at %L",
3126 sym
->name
, &expr
->where
);
3130 /* If this is a deferred TBP with an abstract interface, its result
3131 cannot be an assumed length character (F2003: C418). */
3132 if (sym
&& sym
->attr
.abstract
&& sym
->attr
.function
3133 && sym
->result
->ts
.u
.cl
3134 && sym
->result
->ts
.u
.cl
->length
== NULL
3135 && !sym
->result
->ts
.deferred
)
3137 gfc_error ("ABSTRACT INTERFACE %qs at %L must not have an assumed "
3138 "character length result (F2008: C418)", sym
->name
,
3143 /* Switch off assumed size checking and do this again for certain kinds
3144 of procedure, once the procedure itself is resolved. */
3145 need_full_assumed_size
++;
3147 if (expr
->symtree
&& expr
->symtree
->n
.sym
)
3148 p
= expr
->symtree
->n
.sym
->attr
.proc
;
3150 if (expr
->value
.function
.isym
&& expr
->value
.function
.isym
->inquiry
)
3151 inquiry_argument
= true;
3152 no_formal_args
= sym
&& is_external_proc (sym
)
3153 && gfc_sym_get_dummy_args (sym
) == NULL
;
3155 if (!resolve_actual_arglist (expr
->value
.function
.actual
,
3158 inquiry_argument
= false;
3162 inquiry_argument
= false;
3164 /* Resume assumed_size checking. */
3165 need_full_assumed_size
--;
3167 /* If the procedure is external, check for usage. */
3168 if (sym
&& is_external_proc (sym
))
3169 resolve_global_procedure (sym
, &expr
->where
,
3170 &expr
->value
.function
.actual
, 0);
3172 if (sym
&& sym
->ts
.type
== BT_CHARACTER
3174 && sym
->ts
.u
.cl
->length
== NULL
3176 && !sym
->ts
.deferred
3177 && expr
->value
.function
.esym
== NULL
3178 && !sym
->attr
.contained
)
3180 /* Internal procedures are taken care of in resolve_contained_fntype. */
3181 gfc_error ("Function %qs is declared CHARACTER(*) and cannot "
3182 "be used at %L since it is not a dummy argument",
3183 sym
->name
, &expr
->where
);
3187 /* See if function is already resolved. */
3189 if (expr
->value
.function
.name
!= NULL
3190 || expr
->value
.function
.isym
!= NULL
)
3192 if (expr
->ts
.type
== BT_UNKNOWN
)
3198 /* Apply the rules of section 14.1.2. */
3200 switch (procedure_kind (sym
))
3203 t
= resolve_generic_f (expr
);
3206 case PTYPE_SPECIFIC
:
3207 t
= resolve_specific_f (expr
);
3211 t
= resolve_unknown_f (expr
);
3215 gfc_internal_error ("resolve_function(): bad function type");
3219 /* If the expression is still a function (it might have simplified),
3220 then we check to see if we are calling an elemental function. */
3222 if (expr
->expr_type
!= EXPR_FUNCTION
)
3225 temp
= need_full_assumed_size
;
3226 need_full_assumed_size
= 0;
3228 if (!resolve_elemental_actual (expr
, NULL
))
3231 if (omp_workshare_flag
3232 && expr
->value
.function
.esym
3233 && ! gfc_elemental (expr
->value
.function
.esym
))
3235 gfc_error ("User defined non-ELEMENTAL function %qs at %L not allowed "
3236 "in WORKSHARE construct", expr
->value
.function
.esym
->name
,
3241 #define GENERIC_ID expr->value.function.isym->id
3242 else if (expr
->value
.function
.actual
!= NULL
3243 && expr
->value
.function
.isym
!= NULL
3244 && GENERIC_ID
!= GFC_ISYM_LBOUND
3245 && GENERIC_ID
!= GFC_ISYM_LCOBOUND
3246 && GENERIC_ID
!= GFC_ISYM_UCOBOUND
3247 && GENERIC_ID
!= GFC_ISYM_LEN
3248 && GENERIC_ID
!= GFC_ISYM_LOC
3249 && GENERIC_ID
!= GFC_ISYM_C_LOC
3250 && GENERIC_ID
!= GFC_ISYM_PRESENT
)
3252 /* Array intrinsics must also have the last upper bound of an
3253 assumed size array argument. UBOUND and SIZE have to be
3254 excluded from the check if the second argument is anything
3257 for (arg
= expr
->value
.function
.actual
; arg
; arg
= arg
->next
)
3259 if ((GENERIC_ID
== GFC_ISYM_UBOUND
|| GENERIC_ID
== GFC_ISYM_SIZE
)
3260 && arg
== expr
->value
.function
.actual
3261 && arg
->next
!= NULL
&& arg
->next
->expr
)
3263 if (arg
->next
->expr
->expr_type
!= EXPR_CONSTANT
)
3266 if (arg
->next
->name
&& strcmp (arg
->next
->name
, "kind") == 0)
3269 if ((int)mpz_get_si (arg
->next
->expr
->value
.integer
)
3274 if (arg
->expr
!= NULL
3275 && arg
->expr
->rank
> 0
3276 && resolve_assumed_size_actual (arg
->expr
))
3282 need_full_assumed_size
= temp
;
3284 if (!check_pure_function(expr
))
3287 /* Functions without the RECURSIVE attribution are not allowed to
3288 * call themselves. */
3289 if (expr
->value
.function
.esym
&& !expr
->value
.function
.esym
->attr
.recursive
)
3292 esym
= expr
->value
.function
.esym
;
3294 if (is_illegal_recursion (esym
, gfc_current_ns
))
3296 if (esym
->attr
.entry
&& esym
->ns
->entries
)
3297 gfc_error ("ENTRY %qs at %L cannot be called recursively, as"
3298 " function %qs is not RECURSIVE",
3299 esym
->name
, &expr
->where
, esym
->ns
->entries
->sym
->name
);
3301 gfc_error ("Function %qs at %L cannot be called recursively, as it"
3302 " is not RECURSIVE", esym
->name
, &expr
->where
);
3308 /* Character lengths of use associated functions may contains references to
3309 symbols not referenced from the current program unit otherwise. Make sure
3310 those symbols are marked as referenced. */
3312 if (expr
->ts
.type
== BT_CHARACTER
&& expr
->value
.function
.esym
3313 && expr
->value
.function
.esym
->attr
.use_assoc
)
3315 gfc_expr_set_symbols_referenced (expr
->ts
.u
.cl
->length
);
3318 /* Make sure that the expression has a typespec that works. */
3319 if (expr
->ts
.type
== BT_UNKNOWN
)
3321 if (expr
->symtree
->n
.sym
->result
3322 && expr
->symtree
->n
.sym
->result
->ts
.type
!= BT_UNKNOWN
3323 && !expr
->symtree
->n
.sym
->result
->attr
.proc_pointer
)
3324 expr
->ts
= expr
->symtree
->n
.sym
->result
->ts
;
3327 if (!expr
->ref
&& !expr
->value
.function
.isym
)
3329 if (expr
->value
.function
.esym
)
3330 update_current_proc_array_outer_dependency (expr
->value
.function
.esym
);
3332 update_current_proc_array_outer_dependency (sym
);
3335 /* typebound procedure: Assume the worst. */
3336 gfc_current_ns
->proc_name
->attr
.array_outer_dependency
= 1;
3342 /************* Subroutine resolution *************/
3345 pure_subroutine (gfc_symbol
*sym
, const char *name
, locus
*loc
)
3352 gfc_error ("Subroutine call to %qs in FORALL block at %L is not PURE",
3356 else if (gfc_do_concurrent_flag
)
3358 gfc_error ("Subroutine call to %qs in DO CONCURRENT block at %L is not "
3362 else if (gfc_pure (NULL
))
3364 gfc_error ("Subroutine call to %qs at %L is not PURE", name
, loc
);
3368 gfc_unset_implicit_pure (NULL
);
3374 resolve_generic_s0 (gfc_code
*c
, gfc_symbol
*sym
)
3378 if (sym
->attr
.generic
)
3380 s
= gfc_search_interface (sym
->generic
, 1, &c
->ext
.actual
);
3383 c
->resolved_sym
= s
;
3384 if (!pure_subroutine (s
, s
->name
, &c
->loc
))
3389 /* TODO: Need to search for elemental references in generic interface. */
3392 if (sym
->attr
.intrinsic
)
3393 return gfc_intrinsic_sub_interface (c
, 0);
3400 resolve_generic_s (gfc_code
*c
)
3405 sym
= c
->symtree
->n
.sym
;
3409 m
= resolve_generic_s0 (c
, sym
);
3412 else if (m
== MATCH_ERROR
)
3416 if (sym
->ns
->parent
== NULL
)
3418 gfc_find_symbol (sym
->name
, sym
->ns
->parent
, 1, &sym
);
3422 if (!generic_sym (sym
))
3426 /* Last ditch attempt. See if the reference is to an intrinsic
3427 that possesses a matching interface. 14.1.2.4 */
3428 sym
= c
->symtree
->n
.sym
;
3430 if (!gfc_is_intrinsic (sym
, 1, c
->loc
))
3432 gfc_error ("There is no specific subroutine for the generic %qs at %L",
3433 sym
->name
, &c
->loc
);
3437 m
= gfc_intrinsic_sub_interface (c
, 0);
3441 gfc_error ("Generic subroutine %qs at %L is not consistent with an "
3442 "intrinsic subroutine interface", sym
->name
, &c
->loc
);
3448 /* Resolve a subroutine call known to be specific. */
3451 resolve_specific_s0 (gfc_code
*c
, gfc_symbol
*sym
)
3455 if (sym
->attr
.external
|| sym
->attr
.if_source
== IFSRC_IFBODY
)
3457 if (sym
->attr
.dummy
)
3459 sym
->attr
.proc
= PROC_DUMMY
;
3463 sym
->attr
.proc
= PROC_EXTERNAL
;
3467 if (sym
->attr
.proc
== PROC_MODULE
|| sym
->attr
.proc
== PROC_INTERNAL
)
3470 if (sym
->attr
.intrinsic
)
3472 m
= gfc_intrinsic_sub_interface (c
, 1);
3476 gfc_error ("Subroutine %qs at %L is INTRINSIC but is not compatible "
3477 "with an intrinsic", sym
->name
, &c
->loc
);
3485 gfc_procedure_use (sym
, &c
->ext
.actual
, &c
->loc
);
3487 c
->resolved_sym
= sym
;
3488 if (!pure_subroutine (sym
, sym
->name
, &c
->loc
))
3496 resolve_specific_s (gfc_code
*c
)
3501 sym
= c
->symtree
->n
.sym
;
3505 m
= resolve_specific_s0 (c
, sym
);
3508 if (m
== MATCH_ERROR
)
3511 if (sym
->ns
->parent
== NULL
)
3514 gfc_find_symbol (sym
->name
, sym
->ns
->parent
, 1, &sym
);
3520 sym
= c
->symtree
->n
.sym
;
3521 gfc_error ("Unable to resolve the specific subroutine %qs at %L",
3522 sym
->name
, &c
->loc
);
3528 /* Resolve a subroutine call not known to be generic nor specific. */
3531 resolve_unknown_s (gfc_code
*c
)
3535 sym
= c
->symtree
->n
.sym
;
3537 if (sym
->attr
.dummy
)
3539 sym
->attr
.proc
= PROC_DUMMY
;
3543 /* See if we have an intrinsic function reference. */
3545 if (gfc_is_intrinsic (sym
, 1, c
->loc
))
3547 if (gfc_intrinsic_sub_interface (c
, 1) == MATCH_YES
)
3552 /* The reference is to an external name. */
3555 gfc_procedure_use (sym
, &c
->ext
.actual
, &c
->loc
);
3557 c
->resolved_sym
= sym
;
3559 return pure_subroutine (sym
, sym
->name
, &c
->loc
);
3563 /* Resolve a subroutine call. Although it was tempting to use the same code
3564 for functions, subroutines and functions are stored differently and this
3565 makes things awkward. */
3568 resolve_call (gfc_code
*c
)
3571 procedure_type ptype
= PROC_INTRINSIC
;
3572 gfc_symbol
*csym
, *sym
;
3573 bool no_formal_args
;
3575 csym
= c
->symtree
? c
->symtree
->n
.sym
: NULL
;
3577 if (csym
&& csym
->ts
.type
!= BT_UNKNOWN
)
3579 gfc_error ("%qs at %L has a type, which is not consistent with "
3580 "the CALL at %L", csym
->name
, &csym
->declared_at
, &c
->loc
);
3584 if (csym
&& gfc_current_ns
->parent
&& csym
->ns
!= gfc_current_ns
)
3587 gfc_find_sym_tree (c
->symtree
->name
, gfc_current_ns
, 1, &st
);
3588 sym
= st
? st
->n
.sym
: NULL
;
3589 if (sym
&& csym
!= sym
3590 && sym
->ns
== gfc_current_ns
3591 && sym
->attr
.flavor
== FL_PROCEDURE
3592 && sym
->attr
.contained
)
3595 if (csym
->attr
.generic
)
3596 c
->symtree
->n
.sym
= sym
;
3599 csym
= c
->symtree
->n
.sym
;
3603 /* If this ia a deferred TBP, c->expr1 will be set. */
3604 if (!c
->expr1
&& csym
)
3606 if (csym
->attr
.abstract
)
3608 gfc_error ("ABSTRACT INTERFACE %qs must not be referenced at %L",
3609 csym
->name
, &c
->loc
);
3613 /* Subroutines without the RECURSIVE attribution are not allowed to
3615 if (is_illegal_recursion (csym
, gfc_current_ns
))
3617 if (csym
->attr
.entry
&& csym
->ns
->entries
)
3618 gfc_error ("ENTRY %qs at %L cannot be called recursively, "
3619 "as subroutine %qs is not RECURSIVE",
3620 csym
->name
, &c
->loc
, csym
->ns
->entries
->sym
->name
);
3622 gfc_error ("SUBROUTINE %qs at %L cannot be called recursively, "
3623 "as it is not RECURSIVE", csym
->name
, &c
->loc
);
3629 /* Switch off assumed size checking and do this again for certain kinds
3630 of procedure, once the procedure itself is resolved. */
3631 need_full_assumed_size
++;
3634 ptype
= csym
->attr
.proc
;
3636 no_formal_args
= csym
&& is_external_proc (csym
)
3637 && gfc_sym_get_dummy_args (csym
) == NULL
;
3638 if (!resolve_actual_arglist (c
->ext
.actual
, ptype
, no_formal_args
))
3641 /* Resume assumed_size checking. */
3642 need_full_assumed_size
--;
3644 /* If external, check for usage. */
3645 if (csym
&& is_external_proc (csym
))
3646 resolve_global_procedure (csym
, &c
->loc
, &c
->ext
.actual
, 1);
3649 if (c
->resolved_sym
== NULL
)
3651 c
->resolved_isym
= NULL
;
3652 switch (procedure_kind (csym
))
3655 t
= resolve_generic_s (c
);
3658 case PTYPE_SPECIFIC
:
3659 t
= resolve_specific_s (c
);
3663 t
= resolve_unknown_s (c
);
3667 gfc_internal_error ("resolve_subroutine(): bad function type");
3671 /* Some checks of elemental subroutine actual arguments. */
3672 if (!resolve_elemental_actual (NULL
, c
))
3676 update_current_proc_array_outer_dependency (csym
);
3678 /* Typebound procedure: Assume the worst. */
3679 gfc_current_ns
->proc_name
->attr
.array_outer_dependency
= 1;
3685 /* Compare the shapes of two arrays that have non-NULL shapes. If both
3686 op1->shape and op2->shape are non-NULL return true if their shapes
3687 match. If both op1->shape and op2->shape are non-NULL return false
3688 if their shapes do not match. If either op1->shape or op2->shape is
3689 NULL, return true. */
3692 compare_shapes (gfc_expr
*op1
, gfc_expr
*op2
)
3699 if (op1
->shape
!= NULL
&& op2
->shape
!= NULL
)
3701 for (i
= 0; i
< op1
->rank
; i
++)
3703 if (mpz_cmp (op1
->shape
[i
], op2
->shape
[i
]) != 0)
3705 gfc_error ("Shapes for operands at %L and %L are not conformable",
3706 &op1
->where
, &op2
->where
);
3716 /* Convert a logical operator to the corresponding bitwise intrinsic call.
3717 For example A .AND. B becomes IAND(A, B). */
3719 logical_to_bitwise (gfc_expr
*e
)
3721 gfc_expr
*tmp
, *op1
, *op2
;
3723 gfc_actual_arglist
*args
= NULL
;
3725 gcc_assert (e
->expr_type
== EXPR_OP
);
3727 isym
= GFC_ISYM_NONE
;
3728 op1
= e
->value
.op
.op1
;
3729 op2
= e
->value
.op
.op2
;
3731 switch (e
->value
.op
.op
)
3734 isym
= GFC_ISYM_NOT
;
3737 isym
= GFC_ISYM_IAND
;
3740 isym
= GFC_ISYM_IOR
;
3742 case INTRINSIC_NEQV
:
3743 isym
= GFC_ISYM_IEOR
;
3746 /* "Bitwise eqv" is just the complement of NEQV === IEOR.
3747 Change the old expression to NEQV, which will get replaced by IEOR,
3748 and wrap it in NOT. */
3749 tmp
= gfc_copy_expr (e
);
3750 tmp
->value
.op
.op
= INTRINSIC_NEQV
;
3751 tmp
= logical_to_bitwise (tmp
);
3752 isym
= GFC_ISYM_NOT
;
3757 gfc_internal_error ("logical_to_bitwise(): Bad intrinsic");
3760 /* Inherit the original operation's operands as arguments. */
3761 args
= gfc_get_actual_arglist ();
3765 args
->next
= gfc_get_actual_arglist ();
3766 args
->next
->expr
= op2
;
3769 /* Convert the expression to a function call. */
3770 e
->expr_type
= EXPR_FUNCTION
;
3771 e
->value
.function
.actual
= args
;
3772 e
->value
.function
.isym
= gfc_intrinsic_function_by_id (isym
);
3773 e
->value
.function
.name
= e
->value
.function
.isym
->name
;
3774 e
->value
.function
.esym
= NULL
;
3776 /* Make up a pre-resolved function call symtree if we need to. */
3777 if (!e
->symtree
|| !e
->symtree
->n
.sym
)
3780 gfc_get_ha_sym_tree (e
->value
.function
.isym
->name
, &e
->symtree
);
3781 sym
= e
->symtree
->n
.sym
;
3783 sym
->attr
.flavor
= FL_PROCEDURE
;
3784 sym
->attr
.function
= 1;
3785 sym
->attr
.elemental
= 1;
3787 sym
->attr
.referenced
= 1;
3788 gfc_intrinsic_symbol (sym
);
3789 gfc_commit_symbol (sym
);
3792 args
->name
= e
->value
.function
.isym
->formal
->name
;
3793 if (e
->value
.function
.isym
->formal
->next
)
3794 args
->next
->name
= e
->value
.function
.isym
->formal
->next
->name
;
3799 /* Recursively append candidate UOP to CANDIDATES. Store the number of
3800 candidates in CANDIDATES_LEN. */
3802 lookup_uop_fuzzy_find_candidates (gfc_symtree
*uop
,
3804 size_t &candidates_len
)
3811 /* Not sure how to properly filter here. Use all for a start.
3812 n.uop.op is NULL for empty interface operators (is that legal?) disregard
3813 these as i suppose they don't make terribly sense. */
3815 if (uop
->n
.uop
->op
!= NULL
)
3816 vec_push (candidates
, candidates_len
, uop
->name
);
3820 lookup_uop_fuzzy_find_candidates (p
, candidates
, candidates_len
);
3824 lookup_uop_fuzzy_find_candidates (p
, candidates
, candidates_len
);
3827 /* Lookup user-operator OP fuzzily, taking names in UOP into account. */
3830 lookup_uop_fuzzy (const char *op
, gfc_symtree
*uop
)
3832 char **candidates
= NULL
;
3833 size_t candidates_len
= 0;
3834 lookup_uop_fuzzy_find_candidates (uop
, candidates
, candidates_len
);
3835 return gfc_closest_fuzzy_match (op
, candidates
);
3839 /* Callback finding an impure function as an operand to an .and. or
3840 .or. expression. Remember the last function warned about to
3841 avoid double warnings when recursing. */
3844 impure_function_callback (gfc_expr
**e
, int *walk_subtrees ATTRIBUTE_UNUSED
,
3849 static gfc_expr
*last
= NULL
;
3850 bool *found
= (bool *) data
;
3852 if (f
->expr_type
== EXPR_FUNCTION
)
3855 if (f
!= last
&& !gfc_pure_function (f
, &name
)
3856 && !gfc_implicit_pure_function (f
))
3859 gfc_warning (OPT_Wfunction_elimination
,
3860 "Impure function %qs at %L might not be evaluated",
3863 gfc_warning (OPT_Wfunction_elimination
,
3864 "Impure function at %L might not be evaluated",
3874 /* Resolve an operator expression node. This can involve replacing the
3875 operation with a user defined function call. */
3878 resolve_operator (gfc_expr
*e
)
3880 gfc_expr
*op1
, *op2
;
3882 bool dual_locus_error
;
3885 /* Resolve all subnodes-- give them types. */
3887 switch (e
->value
.op
.op
)
3890 if (!gfc_resolve_expr (e
->value
.op
.op2
))
3896 case INTRINSIC_UPLUS
:
3897 case INTRINSIC_UMINUS
:
3898 case INTRINSIC_PARENTHESES
:
3899 if (!gfc_resolve_expr (e
->value
.op
.op1
))
3904 /* Typecheck the new node. */
3906 op1
= e
->value
.op
.op1
;
3907 op2
= e
->value
.op
.op2
;
3908 dual_locus_error
= false;
3910 if ((op1
&& op1
->expr_type
== EXPR_NULL
)
3911 || (op2
&& op2
->expr_type
== EXPR_NULL
))
3913 sprintf (msg
, _("Invalid context for NULL() pointer at %%L"));
3917 switch (e
->value
.op
.op
)
3919 case INTRINSIC_UPLUS
:
3920 case INTRINSIC_UMINUS
:
3921 if (op1
->ts
.type
== BT_INTEGER
3922 || op1
->ts
.type
== BT_REAL
3923 || op1
->ts
.type
== BT_COMPLEX
)
3929 sprintf (msg
, _("Operand of unary numeric operator %%<%s%%> at %%L is %s"),
3930 gfc_op2string (e
->value
.op
.op
), gfc_typename (&e
->ts
));
3933 case INTRINSIC_PLUS
:
3934 case INTRINSIC_MINUS
:
3935 case INTRINSIC_TIMES
:
3936 case INTRINSIC_DIVIDE
:
3937 case INTRINSIC_POWER
:
3938 if (gfc_numeric_ts (&op1
->ts
) && gfc_numeric_ts (&op2
->ts
))
3940 gfc_type_convert_binary (e
, 1);
3944 if (op1
->ts
.type
== BT_DERIVED
|| op2
->ts
.type
== BT_DERIVED
)
3946 _("Unexpected derived-type entities in binary intrinsic "
3947 "numeric operator %%<%s%%> at %%L"),
3948 gfc_op2string (e
->value
.op
.op
));
3951 _("Operands of binary numeric operator %%<%s%%> at %%L are %s/%s"),
3952 gfc_op2string (e
->value
.op
.op
), gfc_typename (&op1
->ts
),
3953 gfc_typename (&op2
->ts
));
3956 case INTRINSIC_CONCAT
:
3957 if (op1
->ts
.type
== BT_CHARACTER
&& op2
->ts
.type
== BT_CHARACTER
3958 && op1
->ts
.kind
== op2
->ts
.kind
)
3960 e
->ts
.type
= BT_CHARACTER
;
3961 e
->ts
.kind
= op1
->ts
.kind
;
3966 _("Operands of string concatenation operator at %%L are %s/%s"),
3967 gfc_typename (&op1
->ts
), gfc_typename (&op2
->ts
));
3973 case INTRINSIC_NEQV
:
3974 if (op1
->ts
.type
== BT_LOGICAL
&& op2
->ts
.type
== BT_LOGICAL
)
3976 e
->ts
.type
= BT_LOGICAL
;
3977 e
->ts
.kind
= gfc_kind_max (op1
, op2
);
3978 if (op1
->ts
.kind
< e
->ts
.kind
)
3979 gfc_convert_type (op1
, &e
->ts
, 2);
3980 else if (op2
->ts
.kind
< e
->ts
.kind
)
3981 gfc_convert_type (op2
, &e
->ts
, 2);
3983 if (flag_frontend_optimize
&&
3984 (e
->value
.op
.op
== INTRINSIC_AND
|| e
->value
.op
.op
== INTRINSIC_OR
))
3986 /* Warn about short-circuiting
3987 with impure function as second operand. */
3989 gfc_expr_walker (&op2
, impure_function_callback
, &op2_f
);
3994 /* Logical ops on integers become bitwise ops with -fdec. */
3996 && (op1
->ts
.type
== BT_INTEGER
|| op2
->ts
.type
== BT_INTEGER
))
3998 e
->ts
.type
= BT_INTEGER
;
3999 e
->ts
.kind
= gfc_kind_max (op1
, op2
);
4000 if (op1
->ts
.type
!= e
->ts
.type
|| op1
->ts
.kind
!= e
->ts
.kind
)
4001 gfc_convert_type (op1
, &e
->ts
, 1);
4002 if (op2
->ts
.type
!= e
->ts
.type
|| op2
->ts
.kind
!= e
->ts
.kind
)
4003 gfc_convert_type (op2
, &e
->ts
, 1);
4004 e
= logical_to_bitwise (e
);
4008 sprintf (msg
, _("Operands of logical operator %%<%s%%> at %%L are %s/%s"),
4009 gfc_op2string (e
->value
.op
.op
), gfc_typename (&op1
->ts
),
4010 gfc_typename (&op2
->ts
));
4015 /* Logical ops on integers become bitwise ops with -fdec. */
4016 if (flag_dec
&& op1
->ts
.type
== BT_INTEGER
)
4018 e
->ts
.type
= BT_INTEGER
;
4019 e
->ts
.kind
= op1
->ts
.kind
;
4020 e
= logical_to_bitwise (e
);
4024 if (op1
->ts
.type
== BT_LOGICAL
)
4026 e
->ts
.type
= BT_LOGICAL
;
4027 e
->ts
.kind
= op1
->ts
.kind
;
4031 sprintf (msg
, _("Operand of .not. operator at %%L is %s"),
4032 gfc_typename (&op1
->ts
));
4036 case INTRINSIC_GT_OS
:
4038 case INTRINSIC_GE_OS
:
4040 case INTRINSIC_LT_OS
:
4042 case INTRINSIC_LE_OS
:
4043 if (op1
->ts
.type
== BT_COMPLEX
|| op2
->ts
.type
== BT_COMPLEX
)
4045 strcpy (msg
, _("COMPLEX quantities cannot be compared at %L"));
4052 case INTRINSIC_EQ_OS
:
4054 case INTRINSIC_NE_OS
:
4055 if (op1
->ts
.type
== BT_CHARACTER
&& op2
->ts
.type
== BT_CHARACTER
4056 && op1
->ts
.kind
== op2
->ts
.kind
)
4058 e
->ts
.type
= BT_LOGICAL
;
4059 e
->ts
.kind
= gfc_default_logical_kind
;
4063 if (gfc_numeric_ts (&op1
->ts
) && gfc_numeric_ts (&op2
->ts
))
4065 gfc_type_convert_binary (e
, 1);
4067 e
->ts
.type
= BT_LOGICAL
;
4068 e
->ts
.kind
= gfc_default_logical_kind
;
4070 if (warn_compare_reals
)
4072 gfc_intrinsic_op op
= e
->value
.op
.op
;
4074 /* Type conversion has made sure that the types of op1 and op2
4075 agree, so it is only necessary to check the first one. */
4076 if ((op1
->ts
.type
== BT_REAL
|| op1
->ts
.type
== BT_COMPLEX
)
4077 && (op
== INTRINSIC_EQ
|| op
== INTRINSIC_EQ_OS
4078 || op
== INTRINSIC_NE
|| op
== INTRINSIC_NE_OS
))
4082 if (op
== INTRINSIC_EQ
|| op
== INTRINSIC_EQ_OS
)
4083 msg
= "Equality comparison for %s at %L";
4085 msg
= "Inequality comparison for %s at %L";
4087 gfc_warning (OPT_Wcompare_reals
, msg
,
4088 gfc_typename (&op1
->ts
), &op1
->where
);
4095 if (op1
->ts
.type
== BT_LOGICAL
&& op2
->ts
.type
== BT_LOGICAL
)
4097 _("Logicals at %%L must be compared with %s instead of %s"),
4098 (e
->value
.op
.op
== INTRINSIC_EQ
4099 || e
->value
.op
.op
== INTRINSIC_EQ_OS
)
4100 ? ".eqv." : ".neqv.", gfc_op2string (e
->value
.op
.op
));
4103 _("Operands of comparison operator %%<%s%%> at %%L are %s/%s"),
4104 gfc_op2string (e
->value
.op
.op
), gfc_typename (&op1
->ts
),
4105 gfc_typename (&op2
->ts
));
4109 case INTRINSIC_USER
:
4110 if (e
->value
.op
.uop
->op
== NULL
)
4112 const char *name
= e
->value
.op
.uop
->name
;
4113 const char *guessed
;
4114 guessed
= lookup_uop_fuzzy (name
, e
->value
.op
.uop
->ns
->uop_root
);
4116 sprintf (msg
, _("Unknown operator %%<%s%%> at %%L; did you mean '%s'?"),
4119 sprintf (msg
, _("Unknown operator %%<%s%%> at %%L"), name
);
4121 else if (op2
== NULL
)
4122 sprintf (msg
, _("Operand of user operator %%<%s%%> at %%L is %s"),
4123 e
->value
.op
.uop
->name
, gfc_typename (&op1
->ts
));
4126 sprintf (msg
, _("Operands of user operator %%<%s%%> at %%L are %s/%s"),
4127 e
->value
.op
.uop
->name
, gfc_typename (&op1
->ts
),
4128 gfc_typename (&op2
->ts
));
4129 e
->value
.op
.uop
->op
->sym
->attr
.referenced
= 1;
4134 case INTRINSIC_PARENTHESES
:
4136 if (e
->ts
.type
== BT_CHARACTER
)
4137 e
->ts
.u
.cl
= op1
->ts
.u
.cl
;
4141 gfc_internal_error ("resolve_operator(): Bad intrinsic");
4144 /* Deal with arrayness of an operand through an operator. */
4146 switch (e
->value
.op
.op
)
4148 case INTRINSIC_PLUS
:
4149 case INTRINSIC_MINUS
:
4150 case INTRINSIC_TIMES
:
4151 case INTRINSIC_DIVIDE
:
4152 case INTRINSIC_POWER
:
4153 case INTRINSIC_CONCAT
:
4157 case INTRINSIC_NEQV
:
4159 case INTRINSIC_EQ_OS
:
4161 case INTRINSIC_NE_OS
:
4163 case INTRINSIC_GT_OS
:
4165 case INTRINSIC_GE_OS
:
4167 case INTRINSIC_LT_OS
:
4169 case INTRINSIC_LE_OS
:
4171 if (op1
->rank
== 0 && op2
->rank
== 0)
4174 if (op1
->rank
== 0 && op2
->rank
!= 0)
4176 e
->rank
= op2
->rank
;
4178 if (e
->shape
== NULL
)
4179 e
->shape
= gfc_copy_shape (op2
->shape
, op2
->rank
);
4182 if (op1
->rank
!= 0 && op2
->rank
== 0)
4184 e
->rank
= op1
->rank
;
4186 if (e
->shape
== NULL
)
4187 e
->shape
= gfc_copy_shape (op1
->shape
, op1
->rank
);
4190 if (op1
->rank
!= 0 && op2
->rank
!= 0)
4192 if (op1
->rank
== op2
->rank
)
4194 e
->rank
= op1
->rank
;
4195 if (e
->shape
== NULL
)
4197 t
= compare_shapes (op1
, op2
);
4201 e
->shape
= gfc_copy_shape (op1
->shape
, op1
->rank
);
4206 /* Allow higher level expressions to work. */
4209 /* Try user-defined operators, and otherwise throw an error. */
4210 dual_locus_error
= true;
4212 _("Inconsistent ranks for operator at %%L and %%L"));
4219 case INTRINSIC_PARENTHESES
:
4221 case INTRINSIC_UPLUS
:
4222 case INTRINSIC_UMINUS
:
4223 /* Simply copy arrayness attribute */
4224 e
->rank
= op1
->rank
;
4226 if (e
->shape
== NULL
)
4227 e
->shape
= gfc_copy_shape (op1
->shape
, op1
->rank
);
4237 /* Attempt to simplify the expression. */
4240 t
= gfc_simplify_expr (e
, 0);
4241 /* Some calls do not succeed in simplification and return false
4242 even though there is no error; e.g. variable references to
4243 PARAMETER arrays. */
4244 if (!gfc_is_constant_expr (e
))
4252 match m
= gfc_extend_expr (e
);
4255 if (m
== MATCH_ERROR
)
4259 if (dual_locus_error
)
4260 gfc_error (msg
, &op1
->where
, &op2
->where
);
4262 gfc_error (msg
, &e
->where
);
4268 /************** Array resolution subroutines **************/
4271 { CMP_LT
, CMP_EQ
, CMP_GT
, CMP_UNKNOWN
};
4273 /* Compare two integer expressions. */
4275 static compare_result
4276 compare_bound (gfc_expr
*a
, gfc_expr
*b
)
4280 if (a
== NULL
|| a
->expr_type
!= EXPR_CONSTANT
4281 || b
== NULL
|| b
->expr_type
!= EXPR_CONSTANT
)
4284 /* If either of the types isn't INTEGER, we must have
4285 raised an error earlier. */
4287 if (a
->ts
.type
!= BT_INTEGER
|| b
->ts
.type
!= BT_INTEGER
)
4290 i
= mpz_cmp (a
->value
.integer
, b
->value
.integer
);
4300 /* Compare an integer expression with an integer. */
4302 static compare_result
4303 compare_bound_int (gfc_expr
*a
, int b
)
4307 if (a
== NULL
|| a
->expr_type
!= EXPR_CONSTANT
)
4310 if (a
->ts
.type
!= BT_INTEGER
)
4311 gfc_internal_error ("compare_bound_int(): Bad expression");
4313 i
= mpz_cmp_si (a
->value
.integer
, b
);
4323 /* Compare an integer expression with a mpz_t. */
4325 static compare_result
4326 compare_bound_mpz_t (gfc_expr
*a
, mpz_t b
)
4330 if (a
== NULL
|| a
->expr_type
!= EXPR_CONSTANT
)
4333 if (a
->ts
.type
!= BT_INTEGER
)
4334 gfc_internal_error ("compare_bound_int(): Bad expression");
4336 i
= mpz_cmp (a
->value
.integer
, b
);
4346 /* Compute the last value of a sequence given by a triplet.
4347 Return 0 if it wasn't able to compute the last value, or if the
4348 sequence if empty, and 1 otherwise. */
4351 compute_last_value_for_triplet (gfc_expr
*start
, gfc_expr
*end
,
4352 gfc_expr
*stride
, mpz_t last
)
4356 if (start
== NULL
|| start
->expr_type
!= EXPR_CONSTANT
4357 || end
== NULL
|| end
->expr_type
!= EXPR_CONSTANT
4358 || (stride
!= NULL
&& stride
->expr_type
!= EXPR_CONSTANT
))
4361 if (start
->ts
.type
!= BT_INTEGER
|| end
->ts
.type
!= BT_INTEGER
4362 || (stride
!= NULL
&& stride
->ts
.type
!= BT_INTEGER
))
4365 if (stride
== NULL
|| compare_bound_int (stride
, 1) == CMP_EQ
)
4367 if (compare_bound (start
, end
) == CMP_GT
)
4369 mpz_set (last
, end
->value
.integer
);
4373 if (compare_bound_int (stride
, 0) == CMP_GT
)
4375 /* Stride is positive */
4376 if (mpz_cmp (start
->value
.integer
, end
->value
.integer
) > 0)
4381 /* Stride is negative */
4382 if (mpz_cmp (start
->value
.integer
, end
->value
.integer
) < 0)
4387 mpz_sub (rem
, end
->value
.integer
, start
->value
.integer
);
4388 mpz_tdiv_r (rem
, rem
, stride
->value
.integer
);
4389 mpz_sub (last
, end
->value
.integer
, rem
);
4396 /* Compare a single dimension of an array reference to the array
4400 check_dimension (int i
, gfc_array_ref
*ar
, gfc_array_spec
*as
)
4404 if (ar
->dimen_type
[i
] == DIMEN_STAR
)
4406 gcc_assert (ar
->stride
[i
] == NULL
);
4407 /* This implies [*] as [*:] and [*:3] are not possible. */
4408 if (ar
->start
[i
] == NULL
)
4410 gcc_assert (ar
->end
[i
] == NULL
);
4415 /* Given start, end and stride values, calculate the minimum and
4416 maximum referenced indexes. */
4418 switch (ar
->dimen_type
[i
])
4421 case DIMEN_THIS_IMAGE
:
4426 if (compare_bound (ar
->start
[i
], as
->lower
[i
]) == CMP_LT
)
4429 gfc_warning (0, "Array reference at %L is out of bounds "
4430 "(%ld < %ld) in dimension %d", &ar
->c_where
[i
],
4431 mpz_get_si (ar
->start
[i
]->value
.integer
),
4432 mpz_get_si (as
->lower
[i
]->value
.integer
), i
+1);
4434 gfc_warning (0, "Array reference at %L is out of bounds "
4435 "(%ld < %ld) in codimension %d", &ar
->c_where
[i
],
4436 mpz_get_si (ar
->start
[i
]->value
.integer
),
4437 mpz_get_si (as
->lower
[i
]->value
.integer
),
4441 if (compare_bound (ar
->start
[i
], as
->upper
[i
]) == CMP_GT
)
4444 gfc_warning (0, "Array reference at %L is out of bounds "
4445 "(%ld > %ld) in dimension %d", &ar
->c_where
[i
],
4446 mpz_get_si (ar
->start
[i
]->value
.integer
),
4447 mpz_get_si (as
->upper
[i
]->value
.integer
), i
+1);
4449 gfc_warning (0, "Array reference at %L is out of bounds "
4450 "(%ld > %ld) in codimension %d", &ar
->c_where
[i
],
4451 mpz_get_si (ar
->start
[i
]->value
.integer
),
4452 mpz_get_si (as
->upper
[i
]->value
.integer
),
4461 #define AR_START (ar->start[i] ? ar->start[i] : as->lower[i])
4462 #define AR_END (ar->end[i] ? ar->end[i] : as->upper[i])
4464 compare_result comp_start_end
= compare_bound (AR_START
, AR_END
);
4466 /* Check for zero stride, which is not allowed. */
4467 if (compare_bound_int (ar
->stride
[i
], 0) == CMP_EQ
)
4469 gfc_error ("Illegal stride of zero at %L", &ar
->c_where
[i
]);
4473 /* if start == len || (stride > 0 && start < len)
4474 || (stride < 0 && start > len),
4475 then the array section contains at least one element. In this
4476 case, there is an out-of-bounds access if
4477 (start < lower || start > upper). */
4478 if (compare_bound (AR_START
, AR_END
) == CMP_EQ
4479 || ((compare_bound_int (ar
->stride
[i
], 0) == CMP_GT
4480 || ar
->stride
[i
] == NULL
) && comp_start_end
== CMP_LT
)
4481 || (compare_bound_int (ar
->stride
[i
], 0) == CMP_LT
4482 && comp_start_end
== CMP_GT
))
4484 if (compare_bound (AR_START
, as
->lower
[i
]) == CMP_LT
)
4486 gfc_warning (0, "Lower array reference at %L is out of bounds "
4487 "(%ld < %ld) in dimension %d", &ar
->c_where
[i
],
4488 mpz_get_si (AR_START
->value
.integer
),
4489 mpz_get_si (as
->lower
[i
]->value
.integer
), i
+1);
4492 if (compare_bound (AR_START
, as
->upper
[i
]) == CMP_GT
)
4494 gfc_warning (0, "Lower array reference at %L is out of bounds "
4495 "(%ld > %ld) in dimension %d", &ar
->c_where
[i
],
4496 mpz_get_si (AR_START
->value
.integer
),
4497 mpz_get_si (as
->upper
[i
]->value
.integer
), i
+1);
4502 /* If we can compute the highest index of the array section,
4503 then it also has to be between lower and upper. */
4504 mpz_init (last_value
);
4505 if (compute_last_value_for_triplet (AR_START
, AR_END
, ar
->stride
[i
],
4508 if (compare_bound_mpz_t (as
->lower
[i
], last_value
) == CMP_GT
)
4510 gfc_warning (0, "Upper array reference at %L is out of bounds "
4511 "(%ld < %ld) in dimension %d", &ar
->c_where
[i
],
4512 mpz_get_si (last_value
),
4513 mpz_get_si (as
->lower
[i
]->value
.integer
), i
+1);
4514 mpz_clear (last_value
);
4517 if (compare_bound_mpz_t (as
->upper
[i
], last_value
) == CMP_LT
)
4519 gfc_warning (0, "Upper array reference at %L is out of bounds "
4520 "(%ld > %ld) in dimension %d", &ar
->c_where
[i
],
4521 mpz_get_si (last_value
),
4522 mpz_get_si (as
->upper
[i
]->value
.integer
), i
+1);
4523 mpz_clear (last_value
);
4527 mpz_clear (last_value
);
4535 gfc_internal_error ("check_dimension(): Bad array reference");
4542 /* Compare an array reference with an array specification. */
4545 compare_spec_to_ref (gfc_array_ref
*ar
)
4552 /* TODO: Full array sections are only allowed as actual parameters. */
4553 if (as
->type
== AS_ASSUMED_SIZE
4554 && (/*ar->type == AR_FULL
4555 ||*/ (ar
->type
== AR_SECTION
4556 && ar
->dimen_type
[i
] == DIMEN_RANGE
&& ar
->end
[i
] == NULL
)))
4558 gfc_error ("Rightmost upper bound of assumed size array section "
4559 "not specified at %L", &ar
->where
);
4563 if (ar
->type
== AR_FULL
)
4566 if (as
->rank
!= ar
->dimen
)
4568 gfc_error ("Rank mismatch in array reference at %L (%d/%d)",
4569 &ar
->where
, ar
->dimen
, as
->rank
);
4573 /* ar->codimen == 0 is a local array. */
4574 if (as
->corank
!= ar
->codimen
&& ar
->codimen
!= 0)
4576 gfc_error ("Coindex rank mismatch in array reference at %L (%d/%d)",
4577 &ar
->where
, ar
->codimen
, as
->corank
);
4581 for (i
= 0; i
< as
->rank
; i
++)
4582 if (!check_dimension (i
, ar
, as
))
4585 /* Local access has no coarray spec. */
4586 if (ar
->codimen
!= 0)
4587 for (i
= as
->rank
; i
< as
->rank
+ as
->corank
; i
++)
4589 if (ar
->dimen_type
[i
] != DIMEN_ELEMENT
&& !ar
->in_allocate
4590 && ar
->dimen_type
[i
] != DIMEN_THIS_IMAGE
)
4592 gfc_error ("Coindex of codimension %d must be a scalar at %L",
4593 i
+ 1 - as
->rank
, &ar
->where
);
4596 if (!check_dimension (i
, ar
, as
))
4604 /* Resolve one part of an array index. */
4607 gfc_resolve_index_1 (gfc_expr
*index
, int check_scalar
,
4608 int force_index_integer_kind
)
4615 if (!gfc_resolve_expr (index
))
4618 if (check_scalar
&& index
->rank
!= 0)
4620 gfc_error ("Array index at %L must be scalar", &index
->where
);
4624 if (index
->ts
.type
!= BT_INTEGER
&& index
->ts
.type
!= BT_REAL
)
4626 gfc_error ("Array index at %L must be of INTEGER type, found %s",
4627 &index
->where
, gfc_basic_typename (index
->ts
.type
));
4631 if (index
->ts
.type
== BT_REAL
)
4632 if (!gfc_notify_std (GFC_STD_LEGACY
, "REAL array index at %L",
4636 if ((index
->ts
.kind
!= gfc_index_integer_kind
4637 && force_index_integer_kind
)
4638 || index
->ts
.type
!= BT_INTEGER
)
4641 ts
.type
= BT_INTEGER
;
4642 ts
.kind
= gfc_index_integer_kind
;
4644 gfc_convert_type_warn (index
, &ts
, 2, 0);
4650 /* Resolve one part of an array index. */
4653 gfc_resolve_index (gfc_expr
*index
, int check_scalar
)
4655 return gfc_resolve_index_1 (index
, check_scalar
, 1);
4658 /* Resolve a dim argument to an intrinsic function. */
4661 gfc_resolve_dim_arg (gfc_expr
*dim
)
4666 if (!gfc_resolve_expr (dim
))
4671 gfc_error ("Argument dim at %L must be scalar", &dim
->where
);
4676 if (dim
->ts
.type
!= BT_INTEGER
)
4678 gfc_error ("Argument dim at %L must be of INTEGER type", &dim
->where
);
4682 if (dim
->ts
.kind
!= gfc_index_integer_kind
)
4687 ts
.type
= BT_INTEGER
;
4688 ts
.kind
= gfc_index_integer_kind
;
4690 gfc_convert_type_warn (dim
, &ts
, 2, 0);
4696 /* Given an expression that contains array references, update those array
4697 references to point to the right array specifications. While this is
4698 filled in during matching, this information is difficult to save and load
4699 in a module, so we take care of it here.
4701 The idea here is that the original array reference comes from the
4702 base symbol. We traverse the list of reference structures, setting
4703 the stored reference to references. Component references can
4704 provide an additional array specification. */
4707 find_array_spec (gfc_expr
*e
)
4713 if (e
->symtree
->n
.sym
->ts
.type
== BT_CLASS
)
4714 as
= CLASS_DATA (e
->symtree
->n
.sym
)->as
;
4716 as
= e
->symtree
->n
.sym
->as
;
4718 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
4723 gfc_internal_error ("find_array_spec(): Missing spec");
4730 c
= ref
->u
.c
.component
;
4731 if (c
->attr
.dimension
)
4734 gfc_internal_error ("find_array_spec(): unused as(1)");
4746 gfc_internal_error ("find_array_spec(): unused as(2)");
4750 /* Resolve an array reference. */
4753 resolve_array_ref (gfc_array_ref
*ar
)
4755 int i
, check_scalar
;
4758 for (i
= 0; i
< ar
->dimen
+ ar
->codimen
; i
++)
4760 check_scalar
= ar
->dimen_type
[i
] == DIMEN_RANGE
;
4762 /* Do not force gfc_index_integer_kind for the start. We can
4763 do fine with any integer kind. This avoids temporary arrays
4764 created for indexing with a vector. */
4765 if (!gfc_resolve_index_1 (ar
->start
[i
], check_scalar
, 0))
4767 if (!gfc_resolve_index (ar
->end
[i
], check_scalar
))
4769 if (!gfc_resolve_index (ar
->stride
[i
], check_scalar
))
4774 if (ar
->dimen_type
[i
] == DIMEN_UNKNOWN
)
4778 ar
->dimen_type
[i
] = DIMEN_ELEMENT
;
4782 ar
->dimen_type
[i
] = DIMEN_VECTOR
;
4783 if (e
->expr_type
== EXPR_VARIABLE
4784 && e
->symtree
->n
.sym
->ts
.type
== BT_DERIVED
)
4785 ar
->start
[i
] = gfc_get_parentheses (e
);
4789 gfc_error ("Array index at %L is an array of rank %d",
4790 &ar
->c_where
[i
], e
->rank
);
4794 /* Fill in the upper bound, which may be lower than the
4795 specified one for something like a(2:10:5), which is
4796 identical to a(2:7:5). Only relevant for strides not equal
4797 to one. Don't try a division by zero. */
4798 if (ar
->dimen_type
[i
] == DIMEN_RANGE
4799 && ar
->stride
[i
] != NULL
&& ar
->stride
[i
]->expr_type
== EXPR_CONSTANT
4800 && mpz_cmp_si (ar
->stride
[i
]->value
.integer
, 1L) != 0
4801 && mpz_cmp_si (ar
->stride
[i
]->value
.integer
, 0L) != 0)
4805 if (gfc_ref_dimen_size (ar
, i
, &size
, &end
))
4807 if (ar
->end
[i
] == NULL
)
4810 gfc_get_constant_expr (BT_INTEGER
, gfc_index_integer_kind
,
4812 mpz_set (ar
->end
[i
]->value
.integer
, end
);
4814 else if (ar
->end
[i
]->ts
.type
== BT_INTEGER
4815 && ar
->end
[i
]->expr_type
== EXPR_CONSTANT
)
4817 mpz_set (ar
->end
[i
]->value
.integer
, end
);
4828 if (ar
->type
== AR_FULL
)
4830 if (ar
->as
->rank
== 0)
4831 ar
->type
= AR_ELEMENT
;
4833 /* Make sure array is the same as array(:,:), this way
4834 we don't need to special case all the time. */
4835 ar
->dimen
= ar
->as
->rank
;
4836 for (i
= 0; i
< ar
->dimen
; i
++)
4838 ar
->dimen_type
[i
] = DIMEN_RANGE
;
4840 gcc_assert (ar
->start
[i
] == NULL
);
4841 gcc_assert (ar
->end
[i
] == NULL
);
4842 gcc_assert (ar
->stride
[i
] == NULL
);
4846 /* If the reference type is unknown, figure out what kind it is. */
4848 if (ar
->type
== AR_UNKNOWN
)
4850 ar
->type
= AR_ELEMENT
;
4851 for (i
= 0; i
< ar
->dimen
; i
++)
4852 if (ar
->dimen_type
[i
] == DIMEN_RANGE
4853 || ar
->dimen_type
[i
] == DIMEN_VECTOR
)
4855 ar
->type
= AR_SECTION
;
4860 if (!ar
->as
->cray_pointee
&& !compare_spec_to_ref (ar
))
4863 if (ar
->as
->corank
&& ar
->codimen
== 0)
4866 ar
->codimen
= ar
->as
->corank
;
4867 for (n
= ar
->dimen
; n
< ar
->dimen
+ ar
->codimen
; n
++)
4868 ar
->dimen_type
[n
] = DIMEN_THIS_IMAGE
;
4876 resolve_substring (gfc_ref
*ref
, bool *equal_length
)
4878 int k
= gfc_validate_kind (BT_INTEGER
, gfc_charlen_int_kind
, false);
4880 if (ref
->u
.ss
.start
!= NULL
)
4882 if (!gfc_resolve_expr (ref
->u
.ss
.start
))
4885 if (ref
->u
.ss
.start
->ts
.type
!= BT_INTEGER
)
4887 gfc_error ("Substring start index at %L must be of type INTEGER",
4888 &ref
->u
.ss
.start
->where
);
4892 if (ref
->u
.ss
.start
->rank
!= 0)
4894 gfc_error ("Substring start index at %L must be scalar",
4895 &ref
->u
.ss
.start
->where
);
4899 if (compare_bound_int (ref
->u
.ss
.start
, 1) == CMP_LT
4900 && (compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_EQ
4901 || compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_GT
))
4903 gfc_error ("Substring start index at %L is less than one",
4904 &ref
->u
.ss
.start
->where
);
4909 if (ref
->u
.ss
.end
!= NULL
)
4911 if (!gfc_resolve_expr (ref
->u
.ss
.end
))
4914 if (ref
->u
.ss
.end
->ts
.type
!= BT_INTEGER
)
4916 gfc_error ("Substring end index at %L must be of type INTEGER",
4917 &ref
->u
.ss
.end
->where
);
4921 if (ref
->u
.ss
.end
->rank
!= 0)
4923 gfc_error ("Substring end index at %L must be scalar",
4924 &ref
->u
.ss
.end
->where
);
4928 if (ref
->u
.ss
.length
!= NULL
4929 && compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.length
->length
) == CMP_GT
4930 && (compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_EQ
4931 || compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_GT
))
4933 gfc_error ("Substring end index at %L exceeds the string length",
4934 &ref
->u
.ss
.start
->where
);
4938 if (compare_bound_mpz_t (ref
->u
.ss
.end
,
4939 gfc_integer_kinds
[k
].huge
) == CMP_GT
4940 && (compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_EQ
4941 || compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_GT
))
4943 gfc_error ("Substring end index at %L is too large",
4944 &ref
->u
.ss
.end
->where
);
4947 /* If the substring has the same length as the original
4948 variable, the reference itself can be deleted. */
4950 if (ref
->u
.ss
.length
!= NULL
4951 && compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.length
->length
) == CMP_EQ
4952 && compare_bound_int (ref
->u
.ss
.start
, 1) == CMP_EQ
)
4953 *equal_length
= true;
4960 /* This function supplies missing substring charlens. */
4963 gfc_resolve_substring_charlen (gfc_expr
*e
)
4966 gfc_expr
*start
, *end
;
4967 gfc_typespec
*ts
= NULL
;
4970 for (char_ref
= e
->ref
; char_ref
; char_ref
= char_ref
->next
)
4972 if (char_ref
->type
== REF_SUBSTRING
|| char_ref
->type
== REF_INQUIRY
)
4974 if (char_ref
->type
== REF_COMPONENT
)
4975 ts
= &char_ref
->u
.c
.component
->ts
;
4978 if (!char_ref
|| char_ref
->type
== REF_INQUIRY
)
4981 gcc_assert (char_ref
->next
== NULL
);
4985 if (e
->ts
.u
.cl
->length
)
4986 gfc_free_expr (e
->ts
.u
.cl
->length
);
4987 else if (e
->expr_type
== EXPR_VARIABLE
&& e
->symtree
->n
.sym
->attr
.dummy
)
4991 e
->ts
.type
= BT_CHARACTER
;
4992 e
->ts
.kind
= gfc_default_character_kind
;
4995 e
->ts
.u
.cl
= gfc_new_charlen (gfc_current_ns
, NULL
);
4997 if (char_ref
->u
.ss
.start
)
4998 start
= gfc_copy_expr (char_ref
->u
.ss
.start
);
5000 start
= gfc_get_int_expr (gfc_charlen_int_kind
, NULL
, 1);
5002 if (char_ref
->u
.ss
.end
)
5003 end
= gfc_copy_expr (char_ref
->u
.ss
.end
);
5004 else if (e
->expr_type
== EXPR_VARIABLE
)
5007 ts
= &e
->symtree
->n
.sym
->ts
;
5008 end
= gfc_copy_expr (ts
->u
.cl
->length
);
5015 gfc_free_expr (start
);
5016 gfc_free_expr (end
);
5020 /* Length = (end - start + 1).
5021 Check first whether it has a constant length. */
5022 if (gfc_dep_difference (end
, start
, &diff
))
5024 gfc_expr
*len
= gfc_get_constant_expr (BT_INTEGER
, gfc_charlen_int_kind
,
5027 mpz_add_ui (len
->value
.integer
, diff
, 1);
5029 e
->ts
.u
.cl
->length
= len
;
5030 /* The check for length < 0 is handled below */
5034 e
->ts
.u
.cl
->length
= gfc_subtract (end
, start
);
5035 e
->ts
.u
.cl
->length
= gfc_add (e
->ts
.u
.cl
->length
,
5036 gfc_get_int_expr (gfc_charlen_int_kind
,
5040 /* F2008, 6.4.1: Both the starting point and the ending point shall
5041 be within the range 1, 2, ..., n unless the starting point exceeds
5042 the ending point, in which case the substring has length zero. */
5044 if (mpz_cmp_si (e
->ts
.u
.cl
->length
->value
.integer
, 0) < 0)
5045 mpz_set_si (e
->ts
.u
.cl
->length
->value
.integer
, 0);
5047 e
->ts
.u
.cl
->length
->ts
.type
= BT_INTEGER
;
5048 e
->ts
.u
.cl
->length
->ts
.kind
= gfc_charlen_int_kind
;
5050 /* Make sure that the length is simplified. */
5051 gfc_simplify_expr (e
->ts
.u
.cl
->length
, 1);
5052 gfc_resolve_expr (e
->ts
.u
.cl
->length
);
5056 /* Resolve subtype references. */
5059 resolve_ref (gfc_expr
*expr
)
5061 int current_part_dimension
, n_components
, seen_part_dimension
;
5062 gfc_ref
*ref
, **prev
;
5065 for (ref
= expr
->ref
; ref
; ref
= ref
->next
)
5066 if (ref
->type
== REF_ARRAY
&& ref
->u
.ar
.as
== NULL
)
5068 find_array_spec (expr
);
5072 for (prev
= &expr
->ref
; *prev
!= NULL
;
5073 prev
= *prev
== NULL
? prev
: &(*prev
)->next
)
5074 switch ((*prev
)->type
)
5077 if (!resolve_array_ref (&(*prev
)->u
.ar
))
5086 equal_length
= false;
5087 if (!resolve_substring (*prev
, &equal_length
))
5090 if (expr
->expr_type
!= EXPR_SUBSTRING
&& equal_length
)
5092 /* Remove the reference and move the charlen, if any. */
5096 expr
->ts
.u
.cl
= ref
->u
.ss
.length
;
5097 ref
->u
.ss
.length
= NULL
;
5098 gfc_free_ref_list (ref
);
5103 /* Check constraints on part references. */
5105 current_part_dimension
= 0;
5106 seen_part_dimension
= 0;
5109 for (ref
= expr
->ref
; ref
; ref
= ref
->next
)
5114 switch (ref
->u
.ar
.type
)
5117 /* Coarray scalar. */
5118 if (ref
->u
.ar
.as
->rank
== 0)
5120 current_part_dimension
= 0;
5125 current_part_dimension
= 1;
5129 current_part_dimension
= 0;
5133 gfc_internal_error ("resolve_ref(): Bad array reference");
5139 if (current_part_dimension
|| seen_part_dimension
)
5142 if (ref
->u
.c
.component
->attr
.pointer
5143 || ref
->u
.c
.component
->attr
.proc_pointer
5144 || (ref
->u
.c
.component
->ts
.type
== BT_CLASS
5145 && CLASS_DATA (ref
->u
.c
.component
)->attr
.pointer
))
5147 gfc_error ("Component to the right of a part reference "
5148 "with nonzero rank must not have the POINTER "
5149 "attribute at %L", &expr
->where
);
5152 else if (ref
->u
.c
.component
->attr
.allocatable
5153 || (ref
->u
.c
.component
->ts
.type
== BT_CLASS
5154 && CLASS_DATA (ref
->u
.c
.component
)->attr
.allocatable
))
5157 gfc_error ("Component to the right of a part reference "
5158 "with nonzero rank must not have the ALLOCATABLE "
5159 "attribute at %L", &expr
->where
);
5172 if (((ref
->type
== REF_COMPONENT
&& n_components
> 1)
5173 || ref
->next
== NULL
)
5174 && current_part_dimension
5175 && seen_part_dimension
)
5177 gfc_error ("Two or more part references with nonzero rank must "
5178 "not be specified at %L", &expr
->where
);
5182 if (ref
->type
== REF_COMPONENT
)
5184 if (current_part_dimension
)
5185 seen_part_dimension
= 1;
5187 /* reset to make sure */
5188 current_part_dimension
= 0;
5196 /* Given an expression, determine its shape. This is easier than it sounds.
5197 Leaves the shape array NULL if it is not possible to determine the shape. */
5200 expression_shape (gfc_expr
*e
)
5202 mpz_t array
[GFC_MAX_DIMENSIONS
];
5205 if (e
->rank
<= 0 || e
->shape
!= NULL
)
5208 for (i
= 0; i
< e
->rank
; i
++)
5209 if (!gfc_array_dimen_size (e
, i
, &array
[i
]))
5212 e
->shape
= gfc_get_shape (e
->rank
);
5214 memcpy (e
->shape
, array
, e
->rank
* sizeof (mpz_t
));
5219 for (i
--; i
>= 0; i
--)
5220 mpz_clear (array
[i
]);
5224 /* Given a variable expression node, compute the rank of the expression by
5225 examining the base symbol and any reference structures it may have. */
5228 expression_rank (gfc_expr
*e
)
5233 /* Just to make sure, because EXPR_COMPCALL's also have an e->ref and that
5234 could lead to serious confusion... */
5235 gcc_assert (e
->expr_type
!= EXPR_COMPCALL
);
5239 if (e
->expr_type
== EXPR_ARRAY
)
5241 /* Constructors can have a rank different from one via RESHAPE(). */
5243 if (e
->symtree
== NULL
)
5249 e
->rank
= (e
->symtree
->n
.sym
->as
== NULL
)
5250 ? 0 : e
->symtree
->n
.sym
->as
->rank
;
5256 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
5258 if (ref
->type
== REF_COMPONENT
&& ref
->u
.c
.component
->attr
.proc_pointer
5259 && ref
->u
.c
.component
->attr
.function
&& !ref
->next
)
5260 rank
= ref
->u
.c
.component
->as
? ref
->u
.c
.component
->as
->rank
: 0;
5262 if (ref
->type
!= REF_ARRAY
)
5265 if (ref
->u
.ar
.type
== AR_FULL
)
5267 rank
= ref
->u
.ar
.as
->rank
;
5271 if (ref
->u
.ar
.type
== AR_SECTION
)
5273 /* Figure out the rank of the section. */
5275 gfc_internal_error ("expression_rank(): Two array specs");
5277 for (i
= 0; i
< ref
->u
.ar
.dimen
; i
++)
5278 if (ref
->u
.ar
.dimen_type
[i
] == DIMEN_RANGE
5279 || ref
->u
.ar
.dimen_type
[i
] == DIMEN_VECTOR
)
5289 expression_shape (e
);
5294 add_caf_get_intrinsic (gfc_expr
*e
)
5296 gfc_expr
*wrapper
, *tmp_expr
;
5300 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
5301 if (ref
->type
== REF_ARRAY
&& ref
->u
.ar
.codimen
> 0)
5306 for (n
= ref
->u
.ar
.dimen
; n
< ref
->u
.ar
.dimen
+ ref
->u
.ar
.codimen
; n
++)
5307 if (ref
->u
.ar
.dimen_type
[n
] != DIMEN_ELEMENT
)
5310 tmp_expr
= XCNEW (gfc_expr
);
5312 wrapper
= gfc_build_intrinsic_call (gfc_current_ns
, GFC_ISYM_CAF_GET
,
5313 "caf_get", tmp_expr
->where
, 1, tmp_expr
);
5314 wrapper
->ts
= e
->ts
;
5315 wrapper
->rank
= e
->rank
;
5317 wrapper
->shape
= gfc_copy_shape (e
->shape
, e
->rank
);
5324 remove_caf_get_intrinsic (gfc_expr
*e
)
5326 gcc_assert (e
->expr_type
== EXPR_FUNCTION
&& e
->value
.function
.isym
5327 && e
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
);
5328 gfc_expr
*e2
= e
->value
.function
.actual
->expr
;
5329 e
->value
.function
.actual
->expr
= NULL
;
5330 gfc_free_actual_arglist (e
->value
.function
.actual
);
5331 gfc_free_shape (&e
->shape
, e
->rank
);
5337 /* Resolve a variable expression. */
5340 resolve_variable (gfc_expr
*e
)
5347 if (e
->symtree
== NULL
)
5349 sym
= e
->symtree
->n
.sym
;
5351 /* Use same check as for TYPE(*) below; this check has to be before TYPE(*)
5352 as ts.type is set to BT_ASSUMED in resolve_symbol. */
5353 if (sym
->attr
.ext_attr
& (1 << EXT_ATTR_NO_ARG_CHECK
))
5355 if (!actual_arg
|| inquiry_argument
)
5357 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute may only "
5358 "be used as actual argument", sym
->name
, &e
->where
);
5362 /* TS 29113, 407b. */
5363 else if (e
->ts
.type
== BT_ASSUMED
)
5367 gfc_error ("Assumed-type variable %s at %L may only be used "
5368 "as actual argument", sym
->name
, &e
->where
);
5371 else if (inquiry_argument
&& !first_actual_arg
)
5373 /* FIXME: It doesn't work reliably as inquiry_argument is not set
5374 for all inquiry functions in resolve_function; the reason is
5375 that the function-name resolution happens too late in that
5377 gfc_error ("Assumed-type variable %s at %L as actual argument to "
5378 "an inquiry function shall be the first argument",
5379 sym
->name
, &e
->where
);
5383 /* TS 29113, C535b. */
5384 else if ((sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
5385 && CLASS_DATA (sym
)->as
5386 && CLASS_DATA (sym
)->as
->type
== AS_ASSUMED_RANK
)
5387 || (sym
->ts
.type
!= BT_CLASS
&& sym
->as
5388 && sym
->as
->type
== AS_ASSUMED_RANK
))
5392 gfc_error ("Assumed-rank variable %s at %L may only be used as "
5393 "actual argument", sym
->name
, &e
->where
);
5396 else if (inquiry_argument
&& !first_actual_arg
)
5398 /* FIXME: It doesn't work reliably as inquiry_argument is not set
5399 for all inquiry functions in resolve_function; the reason is
5400 that the function-name resolution happens too late in that
5402 gfc_error ("Assumed-rank variable %s at %L as actual argument "
5403 "to an inquiry function shall be the first argument",
5404 sym
->name
, &e
->where
);
5409 if ((sym
->attr
.ext_attr
& (1 << EXT_ATTR_NO_ARG_CHECK
)) && e
->ref
5410 && !(e
->ref
->type
== REF_ARRAY
&& e
->ref
->u
.ar
.type
== AR_FULL
5411 && e
->ref
->next
== NULL
))
5413 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute shall not have "
5414 "a subobject reference", sym
->name
, &e
->ref
->u
.ar
.where
);
5417 /* TS 29113, 407b. */
5418 else if (e
->ts
.type
== BT_ASSUMED
&& e
->ref
5419 && !(e
->ref
->type
== REF_ARRAY
&& e
->ref
->u
.ar
.type
== AR_FULL
5420 && e
->ref
->next
== NULL
))
5422 gfc_error ("Assumed-type variable %s at %L shall not have a subobject "
5423 "reference", sym
->name
, &e
->ref
->u
.ar
.where
);
5427 /* TS 29113, C535b. */
5428 if (((sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
5429 && CLASS_DATA (sym
)->as
5430 && CLASS_DATA (sym
)->as
->type
== AS_ASSUMED_RANK
)
5431 || (sym
->ts
.type
!= BT_CLASS
&& sym
->as
5432 && sym
->as
->type
== AS_ASSUMED_RANK
))
5434 && !(e
->ref
->type
== REF_ARRAY
&& e
->ref
->u
.ar
.type
== AR_FULL
5435 && e
->ref
->next
== NULL
))
5437 gfc_error ("Assumed-rank variable %s at %L shall not have a subobject "
5438 "reference", sym
->name
, &e
->ref
->u
.ar
.where
);
5442 /* For variables that are used in an associate (target => object) where
5443 the object's basetype is array valued while the target is scalar,
5444 the ts' type of the component refs is still array valued, which
5445 can't be translated that way. */
5446 if (sym
->assoc
&& e
->rank
== 0 && e
->ref
&& sym
->ts
.type
== BT_CLASS
5447 && sym
->assoc
->target
&& sym
->assoc
->target
->ts
.type
== BT_CLASS
5448 && CLASS_DATA (sym
->assoc
->target
)->as
)
5450 gfc_ref
*ref
= e
->ref
;
5456 ref
->u
.c
.sym
= sym
->ts
.u
.derived
;
5457 /* Stop the loop. */
5467 /* If this is an associate-name, it may be parsed with an array reference
5468 in error even though the target is scalar. Fail directly in this case.
5469 TODO Understand why class scalar expressions must be excluded. */
5470 if (sym
->assoc
&& !(sym
->ts
.type
== BT_CLASS
&& e
->rank
== 0))
5472 if (sym
->ts
.type
== BT_CLASS
)
5473 gfc_fix_class_refs (e
);
5474 if (!sym
->attr
.dimension
&& e
->ref
&& e
->ref
->type
== REF_ARRAY
)
5476 else if (sym
->attr
.dimension
&& (!e
->ref
|| e
->ref
->type
!= REF_ARRAY
))
5478 /* This can happen because the parser did not detect that the
5479 associate name is an array and the expression had no array
5481 gfc_ref
*ref
= gfc_get_ref ();
5482 ref
->type
= REF_ARRAY
;
5483 ref
->u
.ar
= *gfc_get_array_ref();
5484 ref
->u
.ar
.type
= AR_FULL
;
5487 ref
->u
.ar
.as
= sym
->as
;
5488 ref
->u
.ar
.dimen
= sym
->as
->rank
;
5496 if (sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
->attr
.generic
)
5497 sym
->ts
.u
.derived
= gfc_find_dt_in_generic (sym
->ts
.u
.derived
);
5499 /* On the other hand, the parser may not have known this is an array;
5500 in this case, we have to add a FULL reference. */
5501 if (sym
->assoc
&& sym
->attr
.dimension
&& !e
->ref
)
5503 e
->ref
= gfc_get_ref ();
5504 e
->ref
->type
= REF_ARRAY
;
5505 e
->ref
->u
.ar
.type
= AR_FULL
;
5506 e
->ref
->u
.ar
.dimen
= 0;
5509 /* Like above, but for class types, where the checking whether an array
5510 ref is present is more complicated. Furthermore make sure not to add
5511 the full array ref to _vptr or _len refs. */
5512 if (sym
->assoc
&& sym
->ts
.type
== BT_CLASS
5513 && CLASS_DATA (sym
)->attr
.dimension
5514 && (e
->ts
.type
!= BT_DERIVED
|| !e
->ts
.u
.derived
->attr
.vtype
))
5516 gfc_ref
*ref
, *newref
;
5518 newref
= gfc_get_ref ();
5519 newref
->type
= REF_ARRAY
;
5520 newref
->u
.ar
.type
= AR_FULL
;
5521 newref
->u
.ar
.dimen
= 0;
5522 /* Because this is an associate var and the first ref either is a ref to
5523 the _data component or not, no traversal of the ref chain is
5524 needed. The array ref needs to be inserted after the _data ref,
5525 or when that is not present, which may happend for polymorphic
5526 types, then at the first position. */
5530 else if (ref
->type
== REF_COMPONENT
5531 && strcmp ("_data", ref
->u
.c
.component
->name
) == 0)
5533 if (!ref
->next
|| ref
->next
->type
!= REF_ARRAY
)
5535 newref
->next
= ref
->next
;
5539 /* Array ref present already. */
5540 gfc_free_ref_list (newref
);
5542 else if (ref
->type
== REF_ARRAY
)
5543 /* Array ref present already. */
5544 gfc_free_ref_list (newref
);
5552 if (e
->ref
&& !resolve_ref (e
))
5555 if (sym
->attr
.flavor
== FL_PROCEDURE
5556 && (!sym
->attr
.function
5557 || (sym
->attr
.function
&& sym
->result
5558 && sym
->result
->attr
.proc_pointer
5559 && !sym
->result
->attr
.function
)))
5561 e
->ts
.type
= BT_PROCEDURE
;
5562 goto resolve_procedure
;
5565 if (sym
->ts
.type
!= BT_UNKNOWN
)
5566 gfc_variable_attr (e
, &e
->ts
);
5567 else if (sym
->attr
.flavor
== FL_PROCEDURE
5568 && sym
->attr
.function
&& sym
->result
5569 && sym
->result
->ts
.type
!= BT_UNKNOWN
5570 && sym
->result
->attr
.proc_pointer
)
5571 e
->ts
= sym
->result
->ts
;
5574 /* Must be a simple variable reference. */
5575 if (!gfc_set_default_type (sym
, 1, sym
->ns
))
5580 if (check_assumed_size_reference (sym
, e
))
5583 /* Deal with forward references to entries during gfc_resolve_code, to
5584 satisfy, at least partially, 12.5.2.5. */
5585 if (gfc_current_ns
->entries
5586 && current_entry_id
== sym
->entry_id
5589 && cs_base
->current
->op
!= EXEC_ENTRY
)
5591 gfc_entry_list
*entry
;
5592 gfc_formal_arglist
*formal
;
5594 bool seen
, saved_specification_expr
;
5596 /* If the symbol is a dummy... */
5597 if (sym
->attr
.dummy
&& sym
->ns
== gfc_current_ns
)
5599 entry
= gfc_current_ns
->entries
;
5602 /* ...test if the symbol is a parameter of previous entries. */
5603 for (; entry
&& entry
->id
<= current_entry_id
; entry
= entry
->next
)
5604 for (formal
= entry
->sym
->formal
; formal
; formal
= formal
->next
)
5606 if (formal
->sym
&& sym
->name
== formal
->sym
->name
)
5613 /* If it has not been seen as a dummy, this is an error. */
5616 if (specification_expr
)
5617 gfc_error ("Variable %qs, used in a specification expression"
5618 ", is referenced at %L before the ENTRY statement "
5619 "in which it is a parameter",
5620 sym
->name
, &cs_base
->current
->loc
);
5622 gfc_error ("Variable %qs is used at %L before the ENTRY "
5623 "statement in which it is a parameter",
5624 sym
->name
, &cs_base
->current
->loc
);
5629 /* Now do the same check on the specification expressions. */
5630 saved_specification_expr
= specification_expr
;
5631 specification_expr
= true;
5632 if (sym
->ts
.type
== BT_CHARACTER
5633 && !gfc_resolve_expr (sym
->ts
.u
.cl
->length
))
5637 for (n
= 0; n
< sym
->as
->rank
; n
++)
5639 if (!gfc_resolve_expr (sym
->as
->lower
[n
]))
5641 if (!gfc_resolve_expr (sym
->as
->upper
[n
]))
5644 specification_expr
= saved_specification_expr
;
5647 /* Update the symbol's entry level. */
5648 sym
->entry_id
= current_entry_id
+ 1;
5651 /* If a symbol has been host_associated mark it. This is used latter,
5652 to identify if aliasing is possible via host association. */
5653 if (sym
->attr
.flavor
== FL_VARIABLE
5654 && gfc_current_ns
->parent
5655 && (gfc_current_ns
->parent
== sym
->ns
5656 || (gfc_current_ns
->parent
->parent
5657 && gfc_current_ns
->parent
->parent
== sym
->ns
)))
5658 sym
->attr
.host_assoc
= 1;
5660 if (gfc_current_ns
->proc_name
5661 && sym
->attr
.dimension
5662 && (sym
->ns
!= gfc_current_ns
5663 || sym
->attr
.use_assoc
5664 || sym
->attr
.in_common
))
5665 gfc_current_ns
->proc_name
->attr
.array_outer_dependency
= 1;
5668 if (t
&& !resolve_procedure_expression (e
))
5671 /* F2008, C617 and C1229. */
5672 if (!inquiry_argument
&& (e
->ts
.type
== BT_CLASS
|| e
->ts
.type
== BT_DERIVED
)
5673 && gfc_is_coindexed (e
))
5675 gfc_ref
*ref
, *ref2
= NULL
;
5677 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
5679 if (ref
->type
== REF_COMPONENT
)
5681 if (ref
->type
== REF_ARRAY
&& ref
->u
.ar
.codimen
> 0)
5685 for ( ; ref
; ref
= ref
->next
)
5686 if (ref
->type
== REF_COMPONENT
)
5689 /* Expression itself is not coindexed object. */
5690 if (ref
&& e
->ts
.type
== BT_CLASS
)
5692 gfc_error ("Polymorphic subobject of coindexed object at %L",
5697 /* Expression itself is coindexed object. */
5701 c
= ref2
? ref2
->u
.c
.component
: e
->symtree
->n
.sym
->components
;
5702 for ( ; c
; c
= c
->next
)
5703 if (c
->attr
.allocatable
&& c
->ts
.type
== BT_CLASS
)
5705 gfc_error ("Coindexed object with polymorphic allocatable "
5706 "subcomponent at %L", &e
->where
);
5714 expression_rank (e
);
5716 if (t
&& flag_coarray
== GFC_FCOARRAY_LIB
&& gfc_is_coindexed (e
))
5717 add_caf_get_intrinsic (e
);
5719 /* Simplify cases where access to a parameter array results in a
5720 single constant. Suppress errors since those will have been
5721 issued before, as warnings. */
5722 if (e
->rank
== 0 && sym
->as
&& sym
->attr
.flavor
== FL_PARAMETER
)
5724 gfc_push_suppress_errors ();
5725 gfc_simplify_expr (e
, 1);
5726 gfc_pop_suppress_errors ();
5733 /* Checks to see that the correct symbol has been host associated.
5734 The only situation where this arises is that in which a twice
5735 contained function is parsed after the host association is made.
5736 Therefore, on detecting this, change the symbol in the expression
5737 and convert the array reference into an actual arglist if the old
5738 symbol is a variable. */
5740 check_host_association (gfc_expr
*e
)
5742 gfc_symbol
*sym
, *old_sym
;
5746 gfc_actual_arglist
*arg
, *tail
= NULL
;
5747 bool retval
= e
->expr_type
== EXPR_FUNCTION
;
5749 /* If the expression is the result of substitution in
5750 interface.c(gfc_extend_expr) because there is no way in
5751 which the host association can be wrong. */
5752 if (e
->symtree
== NULL
5753 || e
->symtree
->n
.sym
== NULL
5754 || e
->user_operator
)
5757 old_sym
= e
->symtree
->n
.sym
;
5759 if (gfc_current_ns
->parent
5760 && old_sym
->ns
!= gfc_current_ns
)
5762 /* Use the 'USE' name so that renamed module symbols are
5763 correctly handled. */
5764 gfc_find_symbol (e
->symtree
->name
, gfc_current_ns
, 1, &sym
);
5766 if (sym
&& old_sym
!= sym
5767 && sym
->ts
.type
== old_sym
->ts
.type
5768 && sym
->attr
.flavor
== FL_PROCEDURE
5769 && sym
->attr
.contained
)
5771 /* Clear the shape, since it might not be valid. */
5772 gfc_free_shape (&e
->shape
, e
->rank
);
5774 /* Give the expression the right symtree! */
5775 gfc_find_sym_tree (e
->symtree
->name
, NULL
, 1, &st
);
5776 gcc_assert (st
!= NULL
);
5778 if (old_sym
->attr
.flavor
== FL_PROCEDURE
5779 || e
->expr_type
== EXPR_FUNCTION
)
5781 /* Original was function so point to the new symbol, since
5782 the actual argument list is already attached to the
5784 e
->value
.function
.esym
= NULL
;
5789 /* Original was variable so convert array references into
5790 an actual arglist. This does not need any checking now
5791 since resolve_function will take care of it. */
5792 e
->value
.function
.actual
= NULL
;
5793 e
->expr_type
= EXPR_FUNCTION
;
5796 /* Ambiguity will not arise if the array reference is not
5797 the last reference. */
5798 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
5799 if (ref
->type
== REF_ARRAY
&& ref
->next
== NULL
)
5802 gcc_assert (ref
->type
== REF_ARRAY
);
5804 /* Grab the start expressions from the array ref and
5805 copy them into actual arguments. */
5806 for (n
= 0; n
< ref
->u
.ar
.dimen
; n
++)
5808 arg
= gfc_get_actual_arglist ();
5809 arg
->expr
= gfc_copy_expr (ref
->u
.ar
.start
[n
]);
5810 if (e
->value
.function
.actual
== NULL
)
5811 tail
= e
->value
.function
.actual
= arg
;
5819 /* Dump the reference list and set the rank. */
5820 gfc_free_ref_list (e
->ref
);
5822 e
->rank
= sym
->as
? sym
->as
->rank
: 0;
5825 gfc_resolve_expr (e
);
5829 /* This might have changed! */
5830 return e
->expr_type
== EXPR_FUNCTION
;
5835 gfc_resolve_character_operator (gfc_expr
*e
)
5837 gfc_expr
*op1
= e
->value
.op
.op1
;
5838 gfc_expr
*op2
= e
->value
.op
.op2
;
5839 gfc_expr
*e1
= NULL
;
5840 gfc_expr
*e2
= NULL
;
5842 gcc_assert (e
->value
.op
.op
== INTRINSIC_CONCAT
);
5844 if (op1
->ts
.u
.cl
&& op1
->ts
.u
.cl
->length
)
5845 e1
= gfc_copy_expr (op1
->ts
.u
.cl
->length
);
5846 else if (op1
->expr_type
== EXPR_CONSTANT
)
5847 e1
= gfc_get_int_expr (gfc_charlen_int_kind
, NULL
,
5848 op1
->value
.character
.length
);
5850 if (op2
->ts
.u
.cl
&& op2
->ts
.u
.cl
->length
)
5851 e2
= gfc_copy_expr (op2
->ts
.u
.cl
->length
);
5852 else if (op2
->expr_type
== EXPR_CONSTANT
)
5853 e2
= gfc_get_int_expr (gfc_charlen_int_kind
, NULL
,
5854 op2
->value
.character
.length
);
5856 e
->ts
.u
.cl
= gfc_new_charlen (gfc_current_ns
, NULL
);
5866 e
->ts
.u
.cl
->length
= gfc_add (e1
, e2
);
5867 e
->ts
.u
.cl
->length
->ts
.type
= BT_INTEGER
;
5868 e
->ts
.u
.cl
->length
->ts
.kind
= gfc_charlen_int_kind
;
5869 gfc_simplify_expr (e
->ts
.u
.cl
->length
, 0);
5870 gfc_resolve_expr (e
->ts
.u
.cl
->length
);
5876 /* Ensure that an character expression has a charlen and, if possible, a
5877 length expression. */
5880 fixup_charlen (gfc_expr
*e
)
5882 /* The cases fall through so that changes in expression type and the need
5883 for multiple fixes are picked up. In all circumstances, a charlen should
5884 be available for the middle end to hang a backend_decl on. */
5885 switch (e
->expr_type
)
5888 gfc_resolve_character_operator (e
);
5892 if (e
->expr_type
== EXPR_ARRAY
)
5893 gfc_resolve_character_array_constructor (e
);
5896 case EXPR_SUBSTRING
:
5897 if (!e
->ts
.u
.cl
&& e
->ref
)
5898 gfc_resolve_substring_charlen (e
);
5903 e
->ts
.u
.cl
= gfc_new_charlen (gfc_current_ns
, NULL
);
5910 /* Update an actual argument to include the passed-object for type-bound
5911 procedures at the right position. */
5913 static gfc_actual_arglist
*
5914 update_arglist_pass (gfc_actual_arglist
* lst
, gfc_expr
* po
, unsigned argpos
,
5917 gcc_assert (argpos
> 0);
5921 gfc_actual_arglist
* result
;
5923 result
= gfc_get_actual_arglist ();
5927 result
->name
= name
;
5933 lst
->next
= update_arglist_pass (lst
->next
, po
, argpos
- 1, name
);
5935 lst
= update_arglist_pass (NULL
, po
, argpos
- 1, name
);
5940 /* Extract the passed-object from an EXPR_COMPCALL (a copy of it). */
5943 extract_compcall_passed_object (gfc_expr
* e
)
5947 gcc_assert (e
->expr_type
== EXPR_COMPCALL
);
5949 if (e
->value
.compcall
.base_object
)
5950 po
= gfc_copy_expr (e
->value
.compcall
.base_object
);
5953 po
= gfc_get_expr ();
5954 po
->expr_type
= EXPR_VARIABLE
;
5955 po
->symtree
= e
->symtree
;
5956 po
->ref
= gfc_copy_ref (e
->ref
);
5957 po
->where
= e
->where
;
5960 if (!gfc_resolve_expr (po
))
5967 /* Update the arglist of an EXPR_COMPCALL expression to include the
5971 update_compcall_arglist (gfc_expr
* e
)
5974 gfc_typebound_proc
* tbp
;
5976 tbp
= e
->value
.compcall
.tbp
;
5981 po
= extract_compcall_passed_object (e
);
5985 if (tbp
->nopass
|| e
->value
.compcall
.ignore_pass
)
5991 if (tbp
->pass_arg_num
<= 0)
5994 e
->value
.compcall
.actual
= update_arglist_pass (e
->value
.compcall
.actual
, po
,
6002 /* Extract the passed object from a PPC call (a copy of it). */
6005 extract_ppc_passed_object (gfc_expr
*e
)
6010 po
= gfc_get_expr ();
6011 po
->expr_type
= EXPR_VARIABLE
;
6012 po
->symtree
= e
->symtree
;
6013 po
->ref
= gfc_copy_ref (e
->ref
);
6014 po
->where
= e
->where
;
6016 /* Remove PPC reference. */
6018 while ((*ref
)->next
)
6019 ref
= &(*ref
)->next
;
6020 gfc_free_ref_list (*ref
);
6023 if (!gfc_resolve_expr (po
))
6030 /* Update the actual arglist of a procedure pointer component to include the
6034 update_ppc_arglist (gfc_expr
* e
)
6038 gfc_typebound_proc
* tb
;
6040 ppc
= gfc_get_proc_ptr_comp (e
);
6048 else if (tb
->nopass
)
6051 po
= extract_ppc_passed_object (e
);
6058 gfc_error ("Passed-object at %L must be scalar", &e
->where
);
6063 if (po
->ts
.type
== BT_DERIVED
&& po
->ts
.u
.derived
->attr
.abstract
)
6065 gfc_error ("Base object for procedure-pointer component call at %L is of"
6066 " ABSTRACT type %qs", &e
->where
, po
->ts
.u
.derived
->name
);
6070 gcc_assert (tb
->pass_arg_num
> 0);
6071 e
->value
.compcall
.actual
= update_arglist_pass (e
->value
.compcall
.actual
, po
,
6079 /* Check that the object a TBP is called on is valid, i.e. it must not be
6080 of ABSTRACT type (as in subobject%abstract_parent%tbp()). */
6083 check_typebound_baseobject (gfc_expr
* e
)
6086 bool return_value
= false;
6088 base
= extract_compcall_passed_object (e
);
6092 gcc_assert (base
->ts
.type
== BT_DERIVED
|| base
->ts
.type
== BT_CLASS
);
6094 if (base
->ts
.type
== BT_CLASS
&& !gfc_expr_attr (base
).class_ok
)
6098 if (base
->ts
.type
== BT_DERIVED
&& base
->ts
.u
.derived
->attr
.abstract
)
6100 gfc_error ("Base object for type-bound procedure call at %L is of"
6101 " ABSTRACT type %qs", &e
->where
, base
->ts
.u
.derived
->name
);
6105 /* F08:C1230. If the procedure called is NOPASS,
6106 the base object must be scalar. */
6107 if (e
->value
.compcall
.tbp
->nopass
&& base
->rank
!= 0)
6109 gfc_error ("Base object for NOPASS type-bound procedure call at %L must"
6110 " be scalar", &e
->where
);
6114 return_value
= true;
6117 gfc_free_expr (base
);
6118 return return_value
;
6122 /* Resolve a call to a type-bound procedure, either function or subroutine,
6123 statically from the data in an EXPR_COMPCALL expression. The adapted
6124 arglist and the target-procedure symtree are returned. */
6127 resolve_typebound_static (gfc_expr
* e
, gfc_symtree
** target
,
6128 gfc_actual_arglist
** actual
)
6130 gcc_assert (e
->expr_type
== EXPR_COMPCALL
);
6131 gcc_assert (!e
->value
.compcall
.tbp
->is_generic
);
6133 /* Update the actual arglist for PASS. */
6134 if (!update_compcall_arglist (e
))
6137 *actual
= e
->value
.compcall
.actual
;
6138 *target
= e
->value
.compcall
.tbp
->u
.specific
;
6140 gfc_free_ref_list (e
->ref
);
6142 e
->value
.compcall
.actual
= NULL
;
6144 /* If we find a deferred typebound procedure, check for derived types
6145 that an overriding typebound procedure has not been missed. */
6146 if (e
->value
.compcall
.name
6147 && !e
->value
.compcall
.tbp
->non_overridable
6148 && e
->value
.compcall
.base_object
6149 && e
->value
.compcall
.base_object
->ts
.type
== BT_DERIVED
)
6152 gfc_symbol
*derived
;
6154 /* Use the derived type of the base_object. */
6155 derived
= e
->value
.compcall
.base_object
->ts
.u
.derived
;
6158 /* If necessary, go through the inheritance chain. */
6159 while (!st
&& derived
)
6161 /* Look for the typebound procedure 'name'. */
6162 if (derived
->f2k_derived
&& derived
->f2k_derived
->tb_sym_root
)
6163 st
= gfc_find_symtree (derived
->f2k_derived
->tb_sym_root
,
6164 e
->value
.compcall
.name
);
6166 derived
= gfc_get_derived_super_type (derived
);
6169 /* Now find the specific name in the derived type namespace. */
6170 if (st
&& st
->n
.tb
&& st
->n
.tb
->u
.specific
)
6171 gfc_find_sym_tree (st
->n
.tb
->u
.specific
->name
,
6172 derived
->ns
, 1, &st
);
6180 /* Get the ultimate declared type from an expression. In addition,
6181 return the last class/derived type reference and the copy of the
6182 reference list. If check_types is set true, derived types are
6183 identified as well as class references. */
6185 get_declared_from_expr (gfc_ref
**class_ref
, gfc_ref
**new_ref
,
6186 gfc_expr
*e
, bool check_types
)
6188 gfc_symbol
*declared
;
6195 *new_ref
= gfc_copy_ref (e
->ref
);
6197 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
6199 if (ref
->type
!= REF_COMPONENT
)
6202 if ((ref
->u
.c
.component
->ts
.type
== BT_CLASS
6203 || (check_types
&& gfc_bt_struct (ref
->u
.c
.component
->ts
.type
)))
6204 && ref
->u
.c
.component
->attr
.flavor
!= FL_PROCEDURE
)
6206 declared
= ref
->u
.c
.component
->ts
.u
.derived
;
6212 if (declared
== NULL
)
6213 declared
= e
->symtree
->n
.sym
->ts
.u
.derived
;
6219 /* Given an EXPR_COMPCALL calling a GENERIC typebound procedure, figure out
6220 which of the specific bindings (if any) matches the arglist and transform
6221 the expression into a call of that binding. */
6224 resolve_typebound_generic_call (gfc_expr
* e
, const char **name
)
6226 gfc_typebound_proc
* genproc
;
6227 const char* genname
;
6229 gfc_symbol
*derived
;
6231 gcc_assert (e
->expr_type
== EXPR_COMPCALL
);
6232 genname
= e
->value
.compcall
.name
;
6233 genproc
= e
->value
.compcall
.tbp
;
6235 if (!genproc
->is_generic
)
6238 /* Try the bindings on this type and in the inheritance hierarchy. */
6239 for (; genproc
; genproc
= genproc
->overridden
)
6243 gcc_assert (genproc
->is_generic
);
6244 for (g
= genproc
->u
.generic
; g
; g
= g
->next
)
6247 gfc_actual_arglist
* args
;
6250 gcc_assert (g
->specific
);
6252 if (g
->specific
->error
)
6255 target
= g
->specific
->u
.specific
->n
.sym
;
6257 /* Get the right arglist by handling PASS/NOPASS. */
6258 args
= gfc_copy_actual_arglist (e
->value
.compcall
.actual
);
6259 if (!g
->specific
->nopass
)
6262 po
= extract_compcall_passed_object (e
);
6265 gfc_free_actual_arglist (args
);
6269 gcc_assert (g
->specific
->pass_arg_num
> 0);
6270 gcc_assert (!g
->specific
->error
);
6271 args
= update_arglist_pass (args
, po
, g
->specific
->pass_arg_num
,
6272 g
->specific
->pass_arg
);
6274 resolve_actual_arglist (args
, target
->attr
.proc
,
6275 is_external_proc (target
)
6276 && gfc_sym_get_dummy_args (target
) == NULL
);
6278 /* Check if this arglist matches the formal. */
6279 matches
= gfc_arglist_matches_symbol (&args
, target
);
6281 /* Clean up and break out of the loop if we've found it. */
6282 gfc_free_actual_arglist (args
);
6285 e
->value
.compcall
.tbp
= g
->specific
;
6286 genname
= g
->specific_st
->name
;
6287 /* Pass along the name for CLASS methods, where the vtab
6288 procedure pointer component has to be referenced. */
6296 /* Nothing matching found! */
6297 gfc_error ("Found no matching specific binding for the call to the GENERIC"
6298 " %qs at %L", genname
, &e
->where
);
6302 /* Make sure that we have the right specific instance for the name. */
6303 derived
= get_declared_from_expr (NULL
, NULL
, e
, true);
6305 st
= gfc_find_typebound_proc (derived
, NULL
, genname
, true, &e
->where
);
6307 e
->value
.compcall
.tbp
= st
->n
.tb
;
6313 /* Resolve a call to a type-bound subroutine. */
6316 resolve_typebound_call (gfc_code
* c
, const char **name
, bool *overridable
)
6318 gfc_actual_arglist
* newactual
;
6319 gfc_symtree
* target
;
6321 /* Check that's really a SUBROUTINE. */
6322 if (!c
->expr1
->value
.compcall
.tbp
->subroutine
)
6324 if (!c
->expr1
->value
.compcall
.tbp
->is_generic
6325 && c
->expr1
->value
.compcall
.tbp
->u
.specific
6326 && c
->expr1
->value
.compcall
.tbp
->u
.specific
->n
.sym
6327 && c
->expr1
->value
.compcall
.tbp
->u
.specific
->n
.sym
->attr
.subroutine
)
6328 c
->expr1
->value
.compcall
.tbp
->subroutine
= 1;
6331 gfc_error ("%qs at %L should be a SUBROUTINE",
6332 c
->expr1
->value
.compcall
.name
, &c
->loc
);
6337 if (!check_typebound_baseobject (c
->expr1
))
6340 /* Pass along the name for CLASS methods, where the vtab
6341 procedure pointer component has to be referenced. */
6343 *name
= c
->expr1
->value
.compcall
.name
;
6345 if (!resolve_typebound_generic_call (c
->expr1
, name
))
6348 /* Pass along the NON_OVERRIDABLE attribute of the specific TBP. */
6350 *overridable
= !c
->expr1
->value
.compcall
.tbp
->non_overridable
;
6352 /* Transform into an ordinary EXEC_CALL for now. */
6354 if (!resolve_typebound_static (c
->expr1
, &target
, &newactual
))
6357 c
->ext
.actual
= newactual
;
6358 c
->symtree
= target
;
6359 c
->op
= (c
->expr1
->value
.compcall
.assign
? EXEC_ASSIGN_CALL
: EXEC_CALL
);
6361 gcc_assert (!c
->expr1
->ref
&& !c
->expr1
->value
.compcall
.actual
);
6363 gfc_free_expr (c
->expr1
);
6364 c
->expr1
= gfc_get_expr ();
6365 c
->expr1
->expr_type
= EXPR_FUNCTION
;
6366 c
->expr1
->symtree
= target
;
6367 c
->expr1
->where
= c
->loc
;
6369 return resolve_call (c
);
6373 /* Resolve a component-call expression. */
6375 resolve_compcall (gfc_expr
* e
, const char **name
)
6377 gfc_actual_arglist
* newactual
;
6378 gfc_symtree
* target
;
6380 /* Check that's really a FUNCTION. */
6381 if (!e
->value
.compcall
.tbp
->function
)
6383 gfc_error ("%qs at %L should be a FUNCTION",
6384 e
->value
.compcall
.name
, &e
->where
);
6388 /* These must not be assign-calls! */
6389 gcc_assert (!e
->value
.compcall
.assign
);
6391 if (!check_typebound_baseobject (e
))
6394 /* Pass along the name for CLASS methods, where the vtab
6395 procedure pointer component has to be referenced. */
6397 *name
= e
->value
.compcall
.name
;
6399 if (!resolve_typebound_generic_call (e
, name
))
6401 gcc_assert (!e
->value
.compcall
.tbp
->is_generic
);
6403 /* Take the rank from the function's symbol. */
6404 if (e
->value
.compcall
.tbp
->u
.specific
->n
.sym
->as
)
6405 e
->rank
= e
->value
.compcall
.tbp
->u
.specific
->n
.sym
->as
->rank
;
6407 /* For now, we simply transform it into an EXPR_FUNCTION call with the same
6408 arglist to the TBP's binding target. */
6410 if (!resolve_typebound_static (e
, &target
, &newactual
))
6413 e
->value
.function
.actual
= newactual
;
6414 e
->value
.function
.name
= NULL
;
6415 e
->value
.function
.esym
= target
->n
.sym
;
6416 e
->value
.function
.isym
= NULL
;
6417 e
->symtree
= target
;
6418 e
->ts
= target
->n
.sym
->ts
;
6419 e
->expr_type
= EXPR_FUNCTION
;
6421 /* Resolution is not necessary if this is a class subroutine; this
6422 function only has to identify the specific proc. Resolution of
6423 the call will be done next in resolve_typebound_call. */
6424 return gfc_resolve_expr (e
);
6428 static bool resolve_fl_derived (gfc_symbol
*sym
);
6431 /* Resolve a typebound function, or 'method'. First separate all
6432 the non-CLASS references by calling resolve_compcall directly. */
6435 resolve_typebound_function (gfc_expr
* e
)
6437 gfc_symbol
*declared
;
6449 /* Deal with typebound operators for CLASS objects. */
6450 expr
= e
->value
.compcall
.base_object
;
6451 overridable
= !e
->value
.compcall
.tbp
->non_overridable
;
6452 if (expr
&& expr
->ts
.type
== BT_CLASS
&& e
->value
.compcall
.name
)
6454 /* If the base_object is not a variable, the corresponding actual
6455 argument expression must be stored in e->base_expression so
6456 that the corresponding tree temporary can be used as the base
6457 object in gfc_conv_procedure_call. */
6458 if (expr
->expr_type
!= EXPR_VARIABLE
)
6460 gfc_actual_arglist
*args
;
6462 for (args
= e
->value
.function
.actual
; args
; args
= args
->next
)
6464 if (expr
== args
->expr
)
6469 /* Since the typebound operators are generic, we have to ensure
6470 that any delays in resolution are corrected and that the vtab
6473 declared
= ts
.u
.derived
;
6474 c
= gfc_find_component (declared
, "_vptr", true, true, NULL
);
6475 if (c
->ts
.u
.derived
== NULL
)
6476 c
->ts
.u
.derived
= gfc_find_derived_vtab (declared
);
6478 if (!resolve_compcall (e
, &name
))
6481 /* Use the generic name if it is there. */
6482 name
= name
? name
: e
->value
.function
.esym
->name
;
6483 e
->symtree
= expr
->symtree
;
6484 e
->ref
= gfc_copy_ref (expr
->ref
);
6485 get_declared_from_expr (&class_ref
, NULL
, e
, false);
6487 /* Trim away the extraneous references that emerge from nested
6488 use of interface.c (extend_expr). */
6489 if (class_ref
&& class_ref
->next
)
6491 gfc_free_ref_list (class_ref
->next
);
6492 class_ref
->next
= NULL
;
6494 else if (e
->ref
&& !class_ref
&& expr
->ts
.type
!= BT_CLASS
)
6496 gfc_free_ref_list (e
->ref
);
6500 gfc_add_vptr_component (e
);
6501 gfc_add_component_ref (e
, name
);
6502 e
->value
.function
.esym
= NULL
;
6503 if (expr
->expr_type
!= EXPR_VARIABLE
)
6504 e
->base_expr
= expr
;
6509 return resolve_compcall (e
, NULL
);
6511 if (!resolve_ref (e
))
6514 /* Get the CLASS declared type. */
6515 declared
= get_declared_from_expr (&class_ref
, &new_ref
, e
, true);
6517 if (!resolve_fl_derived (declared
))
6520 /* Weed out cases of the ultimate component being a derived type. */
6521 if ((class_ref
&& gfc_bt_struct (class_ref
->u
.c
.component
->ts
.type
))
6522 || (!class_ref
&& st
->n
.sym
->ts
.type
!= BT_CLASS
))
6524 gfc_free_ref_list (new_ref
);
6525 return resolve_compcall (e
, NULL
);
6528 c
= gfc_find_component (declared
, "_data", true, true, NULL
);
6529 declared
= c
->ts
.u
.derived
;
6531 /* Treat the call as if it is a typebound procedure, in order to roll
6532 out the correct name for the specific function. */
6533 if (!resolve_compcall (e
, &name
))
6535 gfc_free_ref_list (new_ref
);
6542 /* Convert the expression to a procedure pointer component call. */
6543 e
->value
.function
.esym
= NULL
;
6549 /* '_vptr' points to the vtab, which contains the procedure pointers. */
6550 gfc_add_vptr_component (e
);
6551 gfc_add_component_ref (e
, name
);
6553 /* Recover the typespec for the expression. This is really only
6554 necessary for generic procedures, where the additional call
6555 to gfc_add_component_ref seems to throw the collection of the
6556 correct typespec. */
6560 gfc_free_ref_list (new_ref
);
6565 /* Resolve a typebound subroutine, or 'method'. First separate all
6566 the non-CLASS references by calling resolve_typebound_call
6570 resolve_typebound_subroutine (gfc_code
*code
)
6572 gfc_symbol
*declared
;
6582 st
= code
->expr1
->symtree
;
6584 /* Deal with typebound operators for CLASS objects. */
6585 expr
= code
->expr1
->value
.compcall
.base_object
;
6586 overridable
= !code
->expr1
->value
.compcall
.tbp
->non_overridable
;
6587 if (expr
&& expr
->ts
.type
== BT_CLASS
&& code
->expr1
->value
.compcall
.name
)
6589 /* If the base_object is not a variable, the corresponding actual
6590 argument expression must be stored in e->base_expression so
6591 that the corresponding tree temporary can be used as the base
6592 object in gfc_conv_procedure_call. */
6593 if (expr
->expr_type
!= EXPR_VARIABLE
)
6595 gfc_actual_arglist
*args
;
6597 args
= code
->expr1
->value
.function
.actual
;
6598 for (; args
; args
= args
->next
)
6599 if (expr
== args
->expr
)
6603 /* Since the typebound operators are generic, we have to ensure
6604 that any delays in resolution are corrected and that the vtab
6606 declared
= expr
->ts
.u
.derived
;
6607 c
= gfc_find_component (declared
, "_vptr", true, true, NULL
);
6608 if (c
->ts
.u
.derived
== NULL
)
6609 c
->ts
.u
.derived
= gfc_find_derived_vtab (declared
);
6611 if (!resolve_typebound_call (code
, &name
, NULL
))
6614 /* Use the generic name if it is there. */
6615 name
= name
? name
: code
->expr1
->value
.function
.esym
->name
;
6616 code
->expr1
->symtree
= expr
->symtree
;
6617 code
->expr1
->ref
= gfc_copy_ref (expr
->ref
);
6619 /* Trim away the extraneous references that emerge from nested
6620 use of interface.c (extend_expr). */
6621 get_declared_from_expr (&class_ref
, NULL
, code
->expr1
, false);
6622 if (class_ref
&& class_ref
->next
)
6624 gfc_free_ref_list (class_ref
->next
);
6625 class_ref
->next
= NULL
;
6627 else if (code
->expr1
->ref
&& !class_ref
)
6629 gfc_free_ref_list (code
->expr1
->ref
);
6630 code
->expr1
->ref
= NULL
;
6633 /* Now use the procedure in the vtable. */
6634 gfc_add_vptr_component (code
->expr1
);
6635 gfc_add_component_ref (code
->expr1
, name
);
6636 code
->expr1
->value
.function
.esym
= NULL
;
6637 if (expr
->expr_type
!= EXPR_VARIABLE
)
6638 code
->expr1
->base_expr
= expr
;
6643 return resolve_typebound_call (code
, NULL
, NULL
);
6645 if (!resolve_ref (code
->expr1
))
6648 /* Get the CLASS declared type. */
6649 get_declared_from_expr (&class_ref
, &new_ref
, code
->expr1
, true);
6651 /* Weed out cases of the ultimate component being a derived type. */
6652 if ((class_ref
&& gfc_bt_struct (class_ref
->u
.c
.component
->ts
.type
))
6653 || (!class_ref
&& st
->n
.sym
->ts
.type
!= BT_CLASS
))
6655 gfc_free_ref_list (new_ref
);
6656 return resolve_typebound_call (code
, NULL
, NULL
);
6659 if (!resolve_typebound_call (code
, &name
, &overridable
))
6661 gfc_free_ref_list (new_ref
);
6664 ts
= code
->expr1
->ts
;
6668 /* Convert the expression to a procedure pointer component call. */
6669 code
->expr1
->value
.function
.esym
= NULL
;
6670 code
->expr1
->symtree
= st
;
6673 code
->expr1
->ref
= new_ref
;
6675 /* '_vptr' points to the vtab, which contains the procedure pointers. */
6676 gfc_add_vptr_component (code
->expr1
);
6677 gfc_add_component_ref (code
->expr1
, name
);
6679 /* Recover the typespec for the expression. This is really only
6680 necessary for generic procedures, where the additional call
6681 to gfc_add_component_ref seems to throw the collection of the
6682 correct typespec. */
6683 code
->expr1
->ts
= ts
;
6686 gfc_free_ref_list (new_ref
);
6692 /* Resolve a CALL to a Procedure Pointer Component (Subroutine). */
6695 resolve_ppc_call (gfc_code
* c
)
6697 gfc_component
*comp
;
6699 comp
= gfc_get_proc_ptr_comp (c
->expr1
);
6700 gcc_assert (comp
!= NULL
);
6702 c
->resolved_sym
= c
->expr1
->symtree
->n
.sym
;
6703 c
->expr1
->expr_type
= EXPR_VARIABLE
;
6705 if (!comp
->attr
.subroutine
)
6706 gfc_add_subroutine (&comp
->attr
, comp
->name
, &c
->expr1
->where
);
6708 if (!resolve_ref (c
->expr1
))
6711 if (!update_ppc_arglist (c
->expr1
))
6714 c
->ext
.actual
= c
->expr1
->value
.compcall
.actual
;
6716 if (!resolve_actual_arglist (c
->ext
.actual
, comp
->attr
.proc
,
6717 !(comp
->ts
.interface
6718 && comp
->ts
.interface
->formal
)))
6721 if (!pure_subroutine (comp
->ts
.interface
, comp
->name
, &c
->expr1
->where
))
6724 gfc_ppc_use (comp
, &c
->expr1
->value
.compcall
.actual
, &c
->expr1
->where
);
6730 /* Resolve a Function Call to a Procedure Pointer Component (Function). */
6733 resolve_expr_ppc (gfc_expr
* e
)
6735 gfc_component
*comp
;
6737 comp
= gfc_get_proc_ptr_comp (e
);
6738 gcc_assert (comp
!= NULL
);
6740 /* Convert to EXPR_FUNCTION. */
6741 e
->expr_type
= EXPR_FUNCTION
;
6742 e
->value
.function
.isym
= NULL
;
6743 e
->value
.function
.actual
= e
->value
.compcall
.actual
;
6745 if (comp
->as
!= NULL
)
6746 e
->rank
= comp
->as
->rank
;
6748 if (!comp
->attr
.function
)
6749 gfc_add_function (&comp
->attr
, comp
->name
, &e
->where
);
6751 if (!resolve_ref (e
))
6754 if (!resolve_actual_arglist (e
->value
.function
.actual
, comp
->attr
.proc
,
6755 !(comp
->ts
.interface
6756 && comp
->ts
.interface
->formal
)))
6759 if (!update_ppc_arglist (e
))
6762 if (!check_pure_function(e
))
6765 gfc_ppc_use (comp
, &e
->value
.compcall
.actual
, &e
->where
);
6772 gfc_is_expandable_expr (gfc_expr
*e
)
6774 gfc_constructor
*con
;
6776 if (e
->expr_type
== EXPR_ARRAY
)
6778 /* Traverse the constructor looking for variables that are flavor
6779 parameter. Parameters must be expanded since they are fully used at
6781 con
= gfc_constructor_first (e
->value
.constructor
);
6782 for (; con
; con
= gfc_constructor_next (con
))
6784 if (con
->expr
->expr_type
== EXPR_VARIABLE
6785 && con
->expr
->symtree
6786 && (con
->expr
->symtree
->n
.sym
->attr
.flavor
== FL_PARAMETER
6787 || con
->expr
->symtree
->n
.sym
->attr
.flavor
== FL_VARIABLE
))
6789 if (con
->expr
->expr_type
== EXPR_ARRAY
6790 && gfc_is_expandable_expr (con
->expr
))
6799 /* Sometimes variables in specification expressions of the result
6800 of module procedures in submodules wind up not being the 'real'
6801 dummy. Find this, if possible, in the namespace of the first
6805 fixup_unique_dummy (gfc_expr
*e
)
6807 gfc_symtree
*st
= NULL
;
6808 gfc_symbol
*s
= NULL
;
6810 if (e
->symtree
->n
.sym
->ns
->proc_name
6811 && e
->symtree
->n
.sym
->ns
->proc_name
->formal
)
6812 s
= e
->symtree
->n
.sym
->ns
->proc_name
->formal
->sym
;
6815 st
= gfc_find_symtree (s
->ns
->sym_root
, e
->symtree
->n
.sym
->name
);
6818 && st
->n
.sym
!= NULL
6819 && st
->n
.sym
->attr
.dummy
)
6823 /* Resolve an expression. That is, make sure that types of operands agree
6824 with their operators, intrinsic operators are converted to function calls
6825 for overloaded types and unresolved function references are resolved. */
6828 gfc_resolve_expr (gfc_expr
*e
)
6831 bool inquiry_save
, actual_arg_save
, first_actual_arg_save
;
6836 /* inquiry_argument only applies to variables. */
6837 inquiry_save
= inquiry_argument
;
6838 actual_arg_save
= actual_arg
;
6839 first_actual_arg_save
= first_actual_arg
;
6841 if (e
->expr_type
!= EXPR_VARIABLE
)
6843 inquiry_argument
= false;
6845 first_actual_arg
= false;
6847 else if (e
->symtree
!= NULL
6848 && *e
->symtree
->name
== '@'
6849 && e
->symtree
->n
.sym
->attr
.dummy
)
6851 /* Deal with submodule specification expressions that are not
6852 found to be referenced in module.c(read_cleanup). */
6853 fixup_unique_dummy (e
);
6856 switch (e
->expr_type
)
6859 t
= resolve_operator (e
);
6865 if (check_host_association (e
))
6866 t
= resolve_function (e
);
6868 t
= resolve_variable (e
);
6870 if (e
->ts
.type
== BT_CHARACTER
&& e
->ts
.u
.cl
== NULL
&& e
->ref
6871 && e
->ref
->type
!= REF_SUBSTRING
)
6872 gfc_resolve_substring_charlen (e
);
6877 t
= resolve_typebound_function (e
);
6880 case EXPR_SUBSTRING
:
6881 t
= resolve_ref (e
);
6890 t
= resolve_expr_ppc (e
);
6895 if (!resolve_ref (e
))
6898 t
= gfc_resolve_array_constructor (e
);
6899 /* Also try to expand a constructor. */
6902 expression_rank (e
);
6903 if (gfc_is_constant_expr (e
) || gfc_is_expandable_expr (e
))
6904 gfc_expand_constructor (e
, false);
6907 /* This provides the opportunity for the length of constructors with
6908 character valued function elements to propagate the string length
6909 to the expression. */
6910 if (t
&& e
->ts
.type
== BT_CHARACTER
)
6912 /* For efficiency, we call gfc_expand_constructor for BT_CHARACTER
6913 here rather then add a duplicate test for it above. */
6914 gfc_expand_constructor (e
, false);
6915 t
= gfc_resolve_character_array_constructor (e
);
6920 case EXPR_STRUCTURE
:
6921 t
= resolve_ref (e
);
6925 t
= resolve_structure_cons (e
, 0);
6929 t
= gfc_simplify_expr (e
, 0);
6933 gfc_internal_error ("gfc_resolve_expr(): Bad expression type");
6936 if (e
->ts
.type
== BT_CHARACTER
&& t
&& !e
->ts
.u
.cl
)
6939 inquiry_argument
= inquiry_save
;
6940 actual_arg
= actual_arg_save
;
6941 first_actual_arg
= first_actual_arg_save
;
6947 /* Resolve an expression from an iterator. They must be scalar and have
6948 INTEGER or (optionally) REAL type. */
6951 gfc_resolve_iterator_expr (gfc_expr
*expr
, bool real_ok
,
6952 const char *name_msgid
)
6954 if (!gfc_resolve_expr (expr
))
6957 if (expr
->rank
!= 0)
6959 gfc_error ("%s at %L must be a scalar", _(name_msgid
), &expr
->where
);
6963 if (expr
->ts
.type
!= BT_INTEGER
)
6965 if (expr
->ts
.type
== BT_REAL
)
6968 return gfc_notify_std (GFC_STD_F95_DEL
,
6969 "%s at %L must be integer",
6970 _(name_msgid
), &expr
->where
);
6973 gfc_error ("%s at %L must be INTEGER", _(name_msgid
),
6980 gfc_error ("%s at %L must be INTEGER", _(name_msgid
), &expr
->where
);
6988 /* Resolve the expressions in an iterator structure. If REAL_OK is
6989 false allow only INTEGER type iterators, otherwise allow REAL types.
6990 Set own_scope to true for ac-implied-do and data-implied-do as those
6991 have a separate scope such that, e.g., a INTENT(IN) doesn't apply. */
6994 gfc_resolve_iterator (gfc_iterator
*iter
, bool real_ok
, bool own_scope
)
6996 if (!gfc_resolve_iterator_expr (iter
->var
, real_ok
, "Loop variable"))
6999 if (!gfc_check_vardef_context (iter
->var
, false, false, own_scope
,
7000 _("iterator variable")))
7003 if (!gfc_resolve_iterator_expr (iter
->start
, real_ok
,
7004 "Start expression in DO loop"))
7007 if (!gfc_resolve_iterator_expr (iter
->end
, real_ok
,
7008 "End expression in DO loop"))
7011 if (!gfc_resolve_iterator_expr (iter
->step
, real_ok
,
7012 "Step expression in DO loop"))
7015 if (iter
->step
->expr_type
== EXPR_CONSTANT
)
7017 if ((iter
->step
->ts
.type
== BT_INTEGER
7018 && mpz_cmp_ui (iter
->step
->value
.integer
, 0) == 0)
7019 || (iter
->step
->ts
.type
== BT_REAL
7020 && mpfr_sgn (iter
->step
->value
.real
) == 0))
7022 gfc_error ("Step expression in DO loop at %L cannot be zero",
7023 &iter
->step
->where
);
7028 /* Convert start, end, and step to the same type as var. */
7029 if (iter
->start
->ts
.kind
!= iter
->var
->ts
.kind
7030 || iter
->start
->ts
.type
!= iter
->var
->ts
.type
)
7031 gfc_convert_type (iter
->start
, &iter
->var
->ts
, 1);
7033 if (iter
->end
->ts
.kind
!= iter
->var
->ts
.kind
7034 || iter
->end
->ts
.type
!= iter
->var
->ts
.type
)
7035 gfc_convert_type (iter
->end
, &iter
->var
->ts
, 1);
7037 if (iter
->step
->ts
.kind
!= iter
->var
->ts
.kind
7038 || iter
->step
->ts
.type
!= iter
->var
->ts
.type
)
7039 gfc_convert_type (iter
->step
, &iter
->var
->ts
, 1);
7041 if (iter
->start
->expr_type
== EXPR_CONSTANT
7042 && iter
->end
->expr_type
== EXPR_CONSTANT
7043 && iter
->step
->expr_type
== EXPR_CONSTANT
)
7046 if (iter
->start
->ts
.type
== BT_INTEGER
)
7048 sgn
= mpz_cmp_ui (iter
->step
->value
.integer
, 0);
7049 cmp
= mpz_cmp (iter
->end
->value
.integer
, iter
->start
->value
.integer
);
7053 sgn
= mpfr_sgn (iter
->step
->value
.real
);
7054 cmp
= mpfr_cmp (iter
->end
->value
.real
, iter
->start
->value
.real
);
7056 if (warn_zerotrip
&& ((sgn
> 0 && cmp
< 0) || (sgn
< 0 && cmp
> 0)))
7057 gfc_warning (OPT_Wzerotrip
,
7058 "DO loop at %L will be executed zero times",
7059 &iter
->step
->where
);
7062 if (iter
->end
->expr_type
== EXPR_CONSTANT
7063 && iter
->end
->ts
.type
== BT_INTEGER
7064 && iter
->step
->expr_type
== EXPR_CONSTANT
7065 && iter
->step
->ts
.type
== BT_INTEGER
7066 && (mpz_cmp_si (iter
->step
->value
.integer
, -1L) == 0
7067 || mpz_cmp_si (iter
->step
->value
.integer
, 1L) == 0))
7069 bool is_step_positive
= mpz_cmp_ui (iter
->step
->value
.integer
, 1) == 0;
7070 int k
= gfc_validate_kind (BT_INTEGER
, iter
->end
->ts
.kind
, false);
7072 if (is_step_positive
7073 && mpz_cmp (iter
->end
->value
.integer
, gfc_integer_kinds
[k
].huge
) == 0)
7074 gfc_warning (OPT_Wundefined_do_loop
,
7075 "DO loop at %L is undefined as it overflows",
7076 &iter
->step
->where
);
7077 else if (!is_step_positive
7078 && mpz_cmp (iter
->end
->value
.integer
,
7079 gfc_integer_kinds
[k
].min_int
) == 0)
7080 gfc_warning (OPT_Wundefined_do_loop
,
7081 "DO loop at %L is undefined as it underflows",
7082 &iter
->step
->where
);
7089 /* Traversal function for find_forall_index. f == 2 signals that
7090 that variable itself is not to be checked - only the references. */
7093 forall_index (gfc_expr
*expr
, gfc_symbol
*sym
, int *f
)
7095 if (expr
->expr_type
!= EXPR_VARIABLE
)
7098 /* A scalar assignment */
7099 if (!expr
->ref
|| *f
== 1)
7101 if (expr
->symtree
->n
.sym
== sym
)
7113 /* Check whether the FORALL index appears in the expression or not.
7114 Returns true if SYM is found in EXPR. */
7117 find_forall_index (gfc_expr
*expr
, gfc_symbol
*sym
, int f
)
7119 if (gfc_traverse_expr (expr
, sym
, forall_index
, f
))
7126 /* Resolve a list of FORALL iterators. The FORALL index-name is constrained
7127 to be a scalar INTEGER variable. The subscripts and stride are scalar
7128 INTEGERs, and if stride is a constant it must be nonzero.
7129 Furthermore "A subscript or stride in a forall-triplet-spec shall
7130 not contain a reference to any index-name in the
7131 forall-triplet-spec-list in which it appears." (7.5.4.1) */
7134 resolve_forall_iterators (gfc_forall_iterator
*it
)
7136 gfc_forall_iterator
*iter
, *iter2
;
7138 for (iter
= it
; iter
; iter
= iter
->next
)
7140 if (gfc_resolve_expr (iter
->var
)
7141 && (iter
->var
->ts
.type
!= BT_INTEGER
|| iter
->var
->rank
!= 0))
7142 gfc_error ("FORALL index-name at %L must be a scalar INTEGER",
7145 if (gfc_resolve_expr (iter
->start
)
7146 && (iter
->start
->ts
.type
!= BT_INTEGER
|| iter
->start
->rank
!= 0))
7147 gfc_error ("FORALL start expression at %L must be a scalar INTEGER",
7148 &iter
->start
->where
);
7149 if (iter
->var
->ts
.kind
!= iter
->start
->ts
.kind
)
7150 gfc_convert_type (iter
->start
, &iter
->var
->ts
, 1);
7152 if (gfc_resolve_expr (iter
->end
)
7153 && (iter
->end
->ts
.type
!= BT_INTEGER
|| iter
->end
->rank
!= 0))
7154 gfc_error ("FORALL end expression at %L must be a scalar INTEGER",
7156 if (iter
->var
->ts
.kind
!= iter
->end
->ts
.kind
)
7157 gfc_convert_type (iter
->end
, &iter
->var
->ts
, 1);
7159 if (gfc_resolve_expr (iter
->stride
))
7161 if (iter
->stride
->ts
.type
!= BT_INTEGER
|| iter
->stride
->rank
!= 0)
7162 gfc_error ("FORALL stride expression at %L must be a scalar %s",
7163 &iter
->stride
->where
, "INTEGER");
7165 if (iter
->stride
->expr_type
== EXPR_CONSTANT
7166 && mpz_cmp_ui (iter
->stride
->value
.integer
, 0) == 0)
7167 gfc_error ("FORALL stride expression at %L cannot be zero",
7168 &iter
->stride
->where
);
7170 if (iter
->var
->ts
.kind
!= iter
->stride
->ts
.kind
)
7171 gfc_convert_type (iter
->stride
, &iter
->var
->ts
, 1);
7174 for (iter
= it
; iter
; iter
= iter
->next
)
7175 for (iter2
= iter
; iter2
; iter2
= iter2
->next
)
7177 if (find_forall_index (iter2
->start
, iter
->var
->symtree
->n
.sym
, 0)
7178 || find_forall_index (iter2
->end
, iter
->var
->symtree
->n
.sym
, 0)
7179 || find_forall_index (iter2
->stride
, iter
->var
->symtree
->n
.sym
, 0))
7180 gfc_error ("FORALL index %qs may not appear in triplet "
7181 "specification at %L", iter
->var
->symtree
->name
,
7182 &iter2
->start
->where
);
7187 /* Given a pointer to a symbol that is a derived type, see if it's
7188 inaccessible, i.e. if it's defined in another module and the components are
7189 PRIVATE. The search is recursive if necessary. Returns zero if no
7190 inaccessible components are found, nonzero otherwise. */
7193 derived_inaccessible (gfc_symbol
*sym
)
7197 if (sym
->attr
.use_assoc
&& sym
->attr
.private_comp
)
7200 for (c
= sym
->components
; c
; c
= c
->next
)
7202 /* Prevent an infinite loop through this function. */
7203 if (c
->ts
.type
== BT_DERIVED
&& c
->attr
.pointer
7204 && sym
== c
->ts
.u
.derived
)
7207 if (c
->ts
.type
== BT_DERIVED
&& derived_inaccessible (c
->ts
.u
.derived
))
7215 /* Resolve the argument of a deallocate expression. The expression must be
7216 a pointer or a full array. */
7219 resolve_deallocate_expr (gfc_expr
*e
)
7221 symbol_attribute attr
;
7222 int allocatable
, pointer
;
7228 if (!gfc_resolve_expr (e
))
7231 if (e
->expr_type
!= EXPR_VARIABLE
)
7234 sym
= e
->symtree
->n
.sym
;
7235 unlimited
= UNLIMITED_POLY(sym
);
7237 if (sym
->ts
.type
== BT_CLASS
)
7239 allocatable
= CLASS_DATA (sym
)->attr
.allocatable
;
7240 pointer
= CLASS_DATA (sym
)->attr
.class_pointer
;
7244 allocatable
= sym
->attr
.allocatable
;
7245 pointer
= sym
->attr
.pointer
;
7247 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
7252 if (ref
->u
.ar
.type
!= AR_FULL
7253 && !(ref
->u
.ar
.type
== AR_ELEMENT
&& ref
->u
.ar
.as
->rank
== 0
7254 && ref
->u
.ar
.codimen
&& gfc_ref_this_image (ref
)))
7259 c
= ref
->u
.c
.component
;
7260 if (c
->ts
.type
== BT_CLASS
)
7262 allocatable
= CLASS_DATA (c
)->attr
.allocatable
;
7263 pointer
= CLASS_DATA (c
)->attr
.class_pointer
;
7267 allocatable
= c
->attr
.allocatable
;
7268 pointer
= c
->attr
.pointer
;
7279 attr
= gfc_expr_attr (e
);
7281 if (allocatable
== 0 && attr
.pointer
== 0 && !unlimited
)
7284 gfc_error ("Allocate-object at %L must be ALLOCATABLE or a POINTER",
7290 if (gfc_is_coindexed (e
))
7292 gfc_error ("Coindexed allocatable object at %L", &e
->where
);
7297 && !gfc_check_vardef_context (e
, true, true, false,
7298 _("DEALLOCATE object")))
7300 if (!gfc_check_vardef_context (e
, false, true, false,
7301 _("DEALLOCATE object")))
7308 /* Returns true if the expression e contains a reference to the symbol sym. */
7310 sym_in_expr (gfc_expr
*e
, gfc_symbol
*sym
, int *f ATTRIBUTE_UNUSED
)
7312 if (e
->expr_type
== EXPR_VARIABLE
&& e
->symtree
->n
.sym
== sym
)
7319 gfc_find_sym_in_expr (gfc_symbol
*sym
, gfc_expr
*e
)
7321 return gfc_traverse_expr (e
, sym
, sym_in_expr
, 0);
7325 /* Given the expression node e for an allocatable/pointer of derived type to be
7326 allocated, get the expression node to be initialized afterwards (needed for
7327 derived types with default initializers, and derived types with allocatable
7328 components that need nullification.) */
7331 gfc_expr_to_initialize (gfc_expr
*e
)
7337 result
= gfc_copy_expr (e
);
7339 /* Change the last array reference from AR_ELEMENT to AR_FULL. */
7340 for (ref
= result
->ref
; ref
; ref
= ref
->next
)
7341 if (ref
->type
== REF_ARRAY
&& ref
->next
== NULL
)
7343 ref
->u
.ar
.type
= AR_FULL
;
7345 for (i
= 0; i
< ref
->u
.ar
.dimen
; i
++)
7346 ref
->u
.ar
.start
[i
] = ref
->u
.ar
.end
[i
] = ref
->u
.ar
.stride
[i
] = NULL
;
7351 gfc_free_shape (&result
->shape
, result
->rank
);
7353 /* Recalculate rank, shape, etc. */
7354 gfc_resolve_expr (result
);
7359 /* If the last ref of an expression is an array ref, return a copy of the
7360 expression with that one removed. Otherwise, a copy of the original
7361 expression. This is used for allocate-expressions and pointer assignment
7362 LHS, where there may be an array specification that needs to be stripped
7363 off when using gfc_check_vardef_context. */
7366 remove_last_array_ref (gfc_expr
* e
)
7371 e2
= gfc_copy_expr (e
);
7372 for (r
= &e2
->ref
; *r
; r
= &(*r
)->next
)
7373 if ((*r
)->type
== REF_ARRAY
&& !(*r
)->next
)
7375 gfc_free_ref_list (*r
);
7384 /* Used in resolve_allocate_expr to check that a allocation-object and
7385 a source-expr are conformable. This does not catch all possible
7386 cases; in particular a runtime checking is needed. */
7389 conformable_arrays (gfc_expr
*e1
, gfc_expr
*e2
)
7392 for (tail
= e2
->ref
; tail
&& tail
->next
; tail
= tail
->next
);
7394 /* First compare rank. */
7395 if ((tail
&& e1
->rank
!= tail
->u
.ar
.as
->rank
)
7396 || (!tail
&& e1
->rank
!= e2
->rank
))
7398 gfc_error ("Source-expr at %L must be scalar or have the "
7399 "same rank as the allocate-object at %L",
7400 &e1
->where
, &e2
->where
);
7411 for (i
= 0; i
< e1
->rank
; i
++)
7413 if (tail
->u
.ar
.start
[i
] == NULL
)
7416 if (tail
->u
.ar
.end
[i
])
7418 mpz_set (s
, tail
->u
.ar
.end
[i
]->value
.integer
);
7419 mpz_sub (s
, s
, tail
->u
.ar
.start
[i
]->value
.integer
);
7420 mpz_add_ui (s
, s
, 1);
7424 mpz_set (s
, tail
->u
.ar
.start
[i
]->value
.integer
);
7427 if (mpz_cmp (e1
->shape
[i
], s
) != 0)
7429 gfc_error ("Source-expr at %L and allocate-object at %L must "
7430 "have the same shape", &e1
->where
, &e2
->where
);
7443 /* Resolve the expression in an ALLOCATE statement, doing the additional
7444 checks to see whether the expression is OK or not. The expression must
7445 have a trailing array reference that gives the size of the array. */
7448 resolve_allocate_expr (gfc_expr
*e
, gfc_code
*code
, bool *array_alloc_wo_spec
)
7450 int i
, pointer
, allocatable
, dimension
, is_abstract
;
7454 symbol_attribute attr
;
7455 gfc_ref
*ref
, *ref2
;
7458 gfc_symbol
*sym
= NULL
;
7463 /* Mark the utmost array component as being in allocate to allow DIMEN_STAR
7464 checking of coarrays. */
7465 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
7466 if (ref
->next
== NULL
)
7469 if (ref
&& ref
->type
== REF_ARRAY
)
7470 ref
->u
.ar
.in_allocate
= true;
7472 if (!gfc_resolve_expr (e
))
7475 /* Make sure the expression is allocatable or a pointer. If it is
7476 pointer, the next-to-last reference must be a pointer. */
7480 sym
= e
->symtree
->n
.sym
;
7482 /* Check whether ultimate component is abstract and CLASS. */
7485 /* Is the allocate-object unlimited polymorphic? */
7486 unlimited
= UNLIMITED_POLY(e
);
7488 if (e
->expr_type
!= EXPR_VARIABLE
)
7491 attr
= gfc_expr_attr (e
);
7492 pointer
= attr
.pointer
;
7493 dimension
= attr
.dimension
;
7494 codimension
= attr
.codimension
;
7498 if (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
))
7500 allocatable
= CLASS_DATA (sym
)->attr
.allocatable
;
7501 pointer
= CLASS_DATA (sym
)->attr
.class_pointer
;
7502 dimension
= CLASS_DATA (sym
)->attr
.dimension
;
7503 codimension
= CLASS_DATA (sym
)->attr
.codimension
;
7504 is_abstract
= CLASS_DATA (sym
)->attr
.abstract
;
7508 allocatable
= sym
->attr
.allocatable
;
7509 pointer
= sym
->attr
.pointer
;
7510 dimension
= sym
->attr
.dimension
;
7511 codimension
= sym
->attr
.codimension
;
7516 for (ref
= e
->ref
; ref
; ref2
= ref
, ref
= ref
->next
)
7521 if (ref
->u
.ar
.codimen
> 0)
7524 for (n
= ref
->u
.ar
.dimen
;
7525 n
< ref
->u
.ar
.dimen
+ ref
->u
.ar
.codimen
; n
++)
7526 if (ref
->u
.ar
.dimen_type
[n
] != DIMEN_THIS_IMAGE
)
7533 if (ref
->next
!= NULL
)
7541 gfc_error ("Coindexed allocatable object at %L",
7546 c
= ref
->u
.c
.component
;
7547 if (c
->ts
.type
== BT_CLASS
)
7549 allocatable
= CLASS_DATA (c
)->attr
.allocatable
;
7550 pointer
= CLASS_DATA (c
)->attr
.class_pointer
;
7551 dimension
= CLASS_DATA (c
)->attr
.dimension
;
7552 codimension
= CLASS_DATA (c
)->attr
.codimension
;
7553 is_abstract
= CLASS_DATA (c
)->attr
.abstract
;
7557 allocatable
= c
->attr
.allocatable
;
7558 pointer
= c
->attr
.pointer
;
7559 dimension
= c
->attr
.dimension
;
7560 codimension
= c
->attr
.codimension
;
7561 is_abstract
= c
->attr
.abstract
;
7574 /* Check for F08:C628. */
7575 if (allocatable
== 0 && pointer
== 0 && !unlimited
)
7577 gfc_error ("Allocate-object at %L must be ALLOCATABLE or a POINTER",
7582 /* Some checks for the SOURCE tag. */
7585 /* Check F03:C631. */
7586 if (!gfc_type_compatible (&e
->ts
, &code
->expr3
->ts
))
7588 gfc_error ("Type of entity at %L is type incompatible with "
7589 "source-expr at %L", &e
->where
, &code
->expr3
->where
);
7593 /* Check F03:C632 and restriction following Note 6.18. */
7594 if (code
->expr3
->rank
> 0 && !conformable_arrays (code
->expr3
, e
))
7597 /* Check F03:C633. */
7598 if (code
->expr3
->ts
.kind
!= e
->ts
.kind
&& !unlimited
)
7600 gfc_error ("The allocate-object at %L and the source-expr at %L "
7601 "shall have the same kind type parameter",
7602 &e
->where
, &code
->expr3
->where
);
7606 /* Check F2008, C642. */
7607 if (code
->expr3
->ts
.type
== BT_DERIVED
7608 && ((codimension
&& gfc_expr_attr (code
->expr3
).lock_comp
)
7609 || (code
->expr3
->ts
.u
.derived
->from_intmod
7610 == INTMOD_ISO_FORTRAN_ENV
7611 && code
->expr3
->ts
.u
.derived
->intmod_sym_id
7612 == ISOFORTRAN_LOCK_TYPE
)))
7614 gfc_error ("The source-expr at %L shall neither be of type "
7615 "LOCK_TYPE nor have a LOCK_TYPE component if "
7616 "allocate-object at %L is a coarray",
7617 &code
->expr3
->where
, &e
->where
);
7621 /* Check TS18508, C702/C703. */
7622 if (code
->expr3
->ts
.type
== BT_DERIVED
7623 && ((codimension
&& gfc_expr_attr (code
->expr3
).event_comp
)
7624 || (code
->expr3
->ts
.u
.derived
->from_intmod
7625 == INTMOD_ISO_FORTRAN_ENV
7626 && code
->expr3
->ts
.u
.derived
->intmod_sym_id
7627 == ISOFORTRAN_EVENT_TYPE
)))
7629 gfc_error ("The source-expr at %L shall neither be of type "
7630 "EVENT_TYPE nor have a EVENT_TYPE component if "
7631 "allocate-object at %L is a coarray",
7632 &code
->expr3
->where
, &e
->where
);
7637 /* Check F08:C629. */
7638 if (is_abstract
&& code
->ext
.alloc
.ts
.type
== BT_UNKNOWN
7641 gcc_assert (e
->ts
.type
== BT_CLASS
);
7642 gfc_error ("Allocating %s of ABSTRACT base type at %L requires a "
7643 "type-spec or source-expr", sym
->name
, &e
->where
);
7647 /* Check F08:C632. */
7648 if (code
->ext
.alloc
.ts
.type
== BT_CHARACTER
&& !e
->ts
.deferred
7649 && !UNLIMITED_POLY (e
))
7653 if (!e
->ts
.u
.cl
->length
)
7656 cmp
= gfc_dep_compare_expr (e
->ts
.u
.cl
->length
,
7657 code
->ext
.alloc
.ts
.u
.cl
->length
);
7658 if (cmp
== 1 || cmp
== -1 || cmp
== -3)
7660 gfc_error ("Allocating %s at %L with type-spec requires the same "
7661 "character-length parameter as in the declaration",
7662 sym
->name
, &e
->where
);
7667 /* In the variable definition context checks, gfc_expr_attr is used
7668 on the expression. This is fooled by the array specification
7669 present in e, thus we have to eliminate that one temporarily. */
7670 e2
= remove_last_array_ref (e
);
7673 t
= gfc_check_vardef_context (e2
, true, true, false,
7674 _("ALLOCATE object"));
7676 t
= gfc_check_vardef_context (e2
, false, true, false,
7677 _("ALLOCATE object"));
7682 if (e
->ts
.type
== BT_CLASS
&& CLASS_DATA (e
)->attr
.dimension
7683 && !code
->expr3
&& code
->ext
.alloc
.ts
.type
== BT_DERIVED
)
7685 /* For class arrays, the initialization with SOURCE is done
7686 using _copy and trans_call. It is convenient to exploit that
7687 when the allocated type is different from the declared type but
7688 no SOURCE exists by setting expr3. */
7689 code
->expr3
= gfc_default_initializer (&code
->ext
.alloc
.ts
);
7691 else if (flag_coarray
!= GFC_FCOARRAY_LIB
&& e
->ts
.type
== BT_DERIVED
7692 && e
->ts
.u
.derived
->from_intmod
== INTMOD_ISO_FORTRAN_ENV
7693 && e
->ts
.u
.derived
->intmod_sym_id
== ISOFORTRAN_EVENT_TYPE
)
7695 /* We have to zero initialize the integer variable. */
7696 code
->expr3
= gfc_get_int_expr (gfc_default_integer_kind
, &e
->where
, 0);
7699 if (e
->ts
.type
== BT_CLASS
&& !unlimited
&& !UNLIMITED_POLY (code
->expr3
))
7701 /* Make sure the vtab symbol is present when
7702 the module variables are generated. */
7703 gfc_typespec ts
= e
->ts
;
7705 ts
= code
->expr3
->ts
;
7706 else if (code
->ext
.alloc
.ts
.type
== BT_DERIVED
)
7707 ts
= code
->ext
.alloc
.ts
;
7709 /* Finding the vtab also publishes the type's symbol. Therefore this
7710 statement is necessary. */
7711 gfc_find_derived_vtab (ts
.u
.derived
);
7713 else if (unlimited
&& !UNLIMITED_POLY (code
->expr3
))
7715 /* Again, make sure the vtab symbol is present when
7716 the module variables are generated. */
7717 gfc_typespec
*ts
= NULL
;
7719 ts
= &code
->expr3
->ts
;
7721 ts
= &code
->ext
.alloc
.ts
;
7725 /* Finding the vtab also publishes the type's symbol. Therefore this
7726 statement is necessary. */
7730 if (dimension
== 0 && codimension
== 0)
7733 /* Make sure the last reference node is an array specification. */
7735 if (!ref2
|| ref2
->type
!= REF_ARRAY
|| ref2
->u
.ar
.type
== AR_FULL
7736 || (dimension
&& ref2
->u
.ar
.dimen
== 0))
7741 if (!gfc_notify_std (GFC_STD_F2008
, "Array specification required "
7742 "in ALLOCATE statement at %L", &e
->where
))
7744 if (code
->expr3
->rank
!= 0)
7745 *array_alloc_wo_spec
= true;
7748 gfc_error ("Array specification or array-valued SOURCE= "
7749 "expression required in ALLOCATE statement at %L",
7756 gfc_error ("Array specification required in ALLOCATE statement "
7757 "at %L", &e
->where
);
7762 /* Make sure that the array section reference makes sense in the
7763 context of an ALLOCATE specification. */
7768 for (i
= ar
->dimen
; i
< ar
->dimen
+ ar
->codimen
; i
++)
7770 switch (ar
->dimen_type
[i
])
7772 case DIMEN_THIS_IMAGE
:
7773 gfc_error ("Coarray specification required in ALLOCATE statement "
7774 "at %L", &e
->where
);
7778 if (ar
->start
[i
] == 0 || ar
->end
[i
] == 0)
7780 /* If ar->stride[i] is NULL, we issued a previous error. */
7781 if (ar
->stride
[i
] == NULL
)
7782 gfc_error ("Bad array specification in ALLOCATE statement "
7783 "at %L", &e
->where
);
7786 else if (gfc_dep_compare_expr (ar
->start
[i
], ar
->end
[i
]) == 1)
7788 gfc_error ("Upper cobound is less than lower cobound at %L",
7789 &ar
->start
[i
]->where
);
7795 if (ar
->start
[i
]->expr_type
== EXPR_CONSTANT
)
7797 gcc_assert (ar
->start
[i
]->ts
.type
== BT_INTEGER
);
7798 if (mpz_cmp_si (ar
->start
[i
]->value
.integer
, 1) < 0)
7800 gfc_error ("Upper cobound is less than lower cobound "
7801 "of 1 at %L", &ar
->start
[i
]->where
);
7811 gfc_error ("Bad array specification in ALLOCATE statement at %L",
7817 for (i
= 0; i
< ar
->dimen
; i
++)
7819 if (ar
->type
== AR_ELEMENT
|| ar
->type
== AR_FULL
)
7822 switch (ar
->dimen_type
[i
])
7828 if (ar
->start
[i
] != NULL
7829 && ar
->end
[i
] != NULL
7830 && ar
->stride
[i
] == NULL
)
7838 case DIMEN_THIS_IMAGE
:
7839 gfc_error ("Bad array specification in ALLOCATE statement at %L",
7845 for (a
= code
->ext
.alloc
.list
; a
; a
= a
->next
)
7847 sym
= a
->expr
->symtree
->n
.sym
;
7849 /* TODO - check derived type components. */
7850 if (gfc_bt_struct (sym
->ts
.type
) || sym
->ts
.type
== BT_CLASS
)
7853 if ((ar
->start
[i
] != NULL
7854 && gfc_find_sym_in_expr (sym
, ar
->start
[i
]))
7855 || (ar
->end
[i
] != NULL
7856 && gfc_find_sym_in_expr (sym
, ar
->end
[i
])))
7858 gfc_error ("%qs must not appear in the array specification at "
7859 "%L in the same ALLOCATE statement where it is "
7860 "itself allocated", sym
->name
, &ar
->where
);
7866 for (i
= ar
->dimen
; i
< ar
->codimen
+ ar
->dimen
; i
++)
7868 if (ar
->dimen_type
[i
] == DIMEN_ELEMENT
7869 || ar
->dimen_type
[i
] == DIMEN_RANGE
)
7871 if (i
== (ar
->dimen
+ ar
->codimen
- 1))
7873 gfc_error ("Expected '*' in coindex specification in ALLOCATE "
7874 "statement at %L", &e
->where
);
7880 if (ar
->dimen_type
[i
] == DIMEN_STAR
&& i
== (ar
->dimen
+ ar
->codimen
- 1)
7881 && ar
->stride
[i
] == NULL
)
7884 gfc_error ("Bad coarray specification in ALLOCATE statement at %L",
7898 resolve_allocate_deallocate (gfc_code
*code
, const char *fcn
)
7900 gfc_expr
*stat
, *errmsg
, *pe
, *qe
;
7901 gfc_alloc
*a
, *p
, *q
;
7904 errmsg
= code
->expr2
;
7906 /* Check the stat variable. */
7909 gfc_check_vardef_context (stat
, false, false, false,
7910 _("STAT variable"));
7912 if ((stat
->ts
.type
!= BT_INTEGER
7913 && !(stat
->ref
&& (stat
->ref
->type
== REF_ARRAY
7914 || stat
->ref
->type
== REF_COMPONENT
)))
7916 gfc_error ("Stat-variable at %L must be a scalar INTEGER "
7917 "variable", &stat
->where
);
7919 for (p
= code
->ext
.alloc
.list
; p
; p
= p
->next
)
7920 if (p
->expr
->symtree
->n
.sym
->name
== stat
->symtree
->n
.sym
->name
)
7922 gfc_ref
*ref1
, *ref2
;
7925 for (ref1
= p
->expr
->ref
, ref2
= stat
->ref
; ref1
&& ref2
;
7926 ref1
= ref1
->next
, ref2
= ref2
->next
)
7928 if (ref1
->type
!= REF_COMPONENT
|| ref2
->type
!= REF_COMPONENT
)
7930 if (ref1
->u
.c
.component
->name
!= ref2
->u
.c
.component
->name
)
7939 gfc_error ("Stat-variable at %L shall not be %sd within "
7940 "the same %s statement", &stat
->where
, fcn
, fcn
);
7946 /* Check the errmsg variable. */
7950 gfc_warning (0, "ERRMSG at %L is useless without a STAT tag",
7953 gfc_check_vardef_context (errmsg
, false, false, false,
7954 _("ERRMSG variable"));
7956 /* F18:R928 alloc-opt is ERRMSG = errmsg-variable
7957 F18:R930 errmsg-variable is scalar-default-char-variable
7958 F18:R906 default-char-variable is variable
7959 F18:C906 default-char-variable shall be default character. */
7960 if ((errmsg
->ts
.type
!= BT_CHARACTER
7962 && (errmsg
->ref
->type
== REF_ARRAY
7963 || errmsg
->ref
->type
== REF_COMPONENT
)))
7965 || errmsg
->ts
.kind
!= gfc_default_character_kind
)
7966 gfc_error ("ERRMSG variable at %L shall be a scalar default CHARACTER "
7967 "variable", &errmsg
->where
);
7969 for (p
= code
->ext
.alloc
.list
; p
; p
= p
->next
)
7970 if (p
->expr
->symtree
->n
.sym
->name
== errmsg
->symtree
->n
.sym
->name
)
7972 gfc_ref
*ref1
, *ref2
;
7975 for (ref1
= p
->expr
->ref
, ref2
= errmsg
->ref
; ref1
&& ref2
;
7976 ref1
= ref1
->next
, ref2
= ref2
->next
)
7978 if (ref1
->type
!= REF_COMPONENT
|| ref2
->type
!= REF_COMPONENT
)
7980 if (ref1
->u
.c
.component
->name
!= ref2
->u
.c
.component
->name
)
7989 gfc_error ("Errmsg-variable at %L shall not be %sd within "
7990 "the same %s statement", &errmsg
->where
, fcn
, fcn
);
7996 /* Check that an allocate-object appears only once in the statement. */
7998 for (p
= code
->ext
.alloc
.list
; p
; p
= p
->next
)
8001 for (q
= p
->next
; q
; q
= q
->next
)
8004 if (pe
->symtree
->n
.sym
->name
== qe
->symtree
->n
.sym
->name
)
8006 /* This is a potential collision. */
8007 gfc_ref
*pr
= pe
->ref
;
8008 gfc_ref
*qr
= qe
->ref
;
8010 /* Follow the references until
8011 a) They start to differ, in which case there is no error;
8012 you can deallocate a%b and a%c in a single statement
8013 b) Both of them stop, which is an error
8014 c) One of them stops, which is also an error. */
8017 if (pr
== NULL
&& qr
== NULL
)
8019 gfc_error ("Allocate-object at %L also appears at %L",
8020 &pe
->where
, &qe
->where
);
8023 else if (pr
!= NULL
&& qr
== NULL
)
8025 gfc_error ("Allocate-object at %L is subobject of"
8026 " object at %L", &pe
->where
, &qe
->where
);
8029 else if (pr
== NULL
&& qr
!= NULL
)
8031 gfc_error ("Allocate-object at %L is subobject of"
8032 " object at %L", &qe
->where
, &pe
->where
);
8035 /* Here, pr != NULL && qr != NULL */
8036 gcc_assert(pr
->type
== qr
->type
);
8037 if (pr
->type
== REF_ARRAY
)
8039 /* Handle cases like allocate(v(3)%x(3), v(2)%x(3)),
8041 gcc_assert (qr
->type
== REF_ARRAY
);
8043 if (pr
->next
&& qr
->next
)
8046 gfc_array_ref
*par
= &(pr
->u
.ar
);
8047 gfc_array_ref
*qar
= &(qr
->u
.ar
);
8049 for (i
=0; i
<par
->dimen
; i
++)
8051 if ((par
->start
[i
] != NULL
8052 || qar
->start
[i
] != NULL
)
8053 && gfc_dep_compare_expr (par
->start
[i
],
8054 qar
->start
[i
]) != 0)
8061 if (pr
->u
.c
.component
->name
!= qr
->u
.c
.component
->name
)
8074 if (strcmp (fcn
, "ALLOCATE") == 0)
8076 bool arr_alloc_wo_spec
= false;
8078 /* Resolving the expr3 in the loop over all objects to allocate would
8079 execute loop invariant code for each loop item. Therefore do it just
8081 if (code
->expr3
&& code
->expr3
->mold
8082 && code
->expr3
->ts
.type
== BT_DERIVED
)
8084 /* Default initialization via MOLD (non-polymorphic). */
8085 gfc_expr
*rhs
= gfc_default_initializer (&code
->expr3
->ts
);
8088 gfc_resolve_expr (rhs
);
8089 gfc_free_expr (code
->expr3
);
8093 for (a
= code
->ext
.alloc
.list
; a
; a
= a
->next
)
8094 resolve_allocate_expr (a
->expr
, code
, &arr_alloc_wo_spec
);
8096 if (arr_alloc_wo_spec
&& code
->expr3
)
8098 /* Mark the allocate to have to take the array specification
8100 code
->ext
.alloc
.arr_spec_from_expr3
= 1;
8105 for (a
= code
->ext
.alloc
.list
; a
; a
= a
->next
)
8106 resolve_deallocate_expr (a
->expr
);
8111 /************ SELECT CASE resolution subroutines ************/
8113 /* Callback function for our mergesort variant. Determines interval
8114 overlaps for CASEs. Return <0 if op1 < op2, 0 for overlap, >0 for
8115 op1 > op2. Assumes we're not dealing with the default case.
8116 We have op1 = (:L), (K:L) or (K:) and op2 = (:N), (M:N) or (M:).
8117 There are nine situations to check. */
8120 compare_cases (const gfc_case
*op1
, const gfc_case
*op2
)
8124 if (op1
->low
== NULL
) /* op1 = (:L) */
8126 /* op2 = (:N), so overlap. */
8128 /* op2 = (M:) or (M:N), L < M */
8129 if (op2
->low
!= NULL
8130 && gfc_compare_expr (op1
->high
, op2
->low
, INTRINSIC_LT
) < 0)
8133 else if (op1
->high
== NULL
) /* op1 = (K:) */
8135 /* op2 = (M:), so overlap. */
8137 /* op2 = (:N) or (M:N), K > N */
8138 if (op2
->high
!= NULL
8139 && gfc_compare_expr (op1
->low
, op2
->high
, INTRINSIC_GT
) > 0)
8142 else /* op1 = (K:L) */
8144 if (op2
->low
== NULL
) /* op2 = (:N), K > N */
8145 retval
= (gfc_compare_expr (op1
->low
, op2
->high
, INTRINSIC_GT
) > 0)
8147 else if (op2
->high
== NULL
) /* op2 = (M:), L < M */
8148 retval
= (gfc_compare_expr (op1
->high
, op2
->low
, INTRINSIC_LT
) < 0)
8150 else /* op2 = (M:N) */
8154 if (gfc_compare_expr (op1
->high
, op2
->low
, INTRINSIC_LT
) < 0)
8157 else if (gfc_compare_expr (op1
->low
, op2
->high
, INTRINSIC_GT
) > 0)
8166 /* Merge-sort a double linked case list, detecting overlap in the
8167 process. LIST is the head of the double linked case list before it
8168 is sorted. Returns the head of the sorted list if we don't see any
8169 overlap, or NULL otherwise. */
8172 check_case_overlap (gfc_case
*list
)
8174 gfc_case
*p
, *q
, *e
, *tail
;
8175 int insize
, nmerges
, psize
, qsize
, cmp
, overlap_seen
;
8177 /* If the passed list was empty, return immediately. */
8184 /* Loop unconditionally. The only exit from this loop is a return
8185 statement, when we've finished sorting the case list. */
8192 /* Count the number of merges we do in this pass. */
8195 /* Loop while there exists a merge to be done. */
8200 /* Count this merge. */
8203 /* Cut the list in two pieces by stepping INSIZE places
8204 forward in the list, starting from P. */
8207 for (i
= 0; i
< insize
; i
++)
8216 /* Now we have two lists. Merge them! */
8217 while (psize
> 0 || (qsize
> 0 && q
!= NULL
))
8219 /* See from which the next case to merge comes from. */
8222 /* P is empty so the next case must come from Q. */
8227 else if (qsize
== 0 || q
== NULL
)
8236 cmp
= compare_cases (p
, q
);
8239 /* The whole case range for P is less than the
8247 /* The whole case range for Q is greater than
8248 the case range for P. */
8255 /* The cases overlap, or they are the same
8256 element in the list. Either way, we must
8257 issue an error and get the next case from P. */
8258 /* FIXME: Sort P and Q by line number. */
8259 gfc_error ("CASE label at %L overlaps with CASE "
8260 "label at %L", &p
->where
, &q
->where
);
8268 /* Add the next element to the merged list. */
8277 /* P has now stepped INSIZE places along, and so has Q. So
8278 they're the same. */
8283 /* If we have done only one merge or none at all, we've
8284 finished sorting the cases. */
8293 /* Otherwise repeat, merging lists twice the size. */
8299 /* Check to see if an expression is suitable for use in a CASE statement.
8300 Makes sure that all case expressions are scalar constants of the same
8301 type. Return false if anything is wrong. */
8304 validate_case_label_expr (gfc_expr
*e
, gfc_expr
*case_expr
)
8306 if (e
== NULL
) return true;
8308 if (e
->ts
.type
!= case_expr
->ts
.type
)
8310 gfc_error ("Expression in CASE statement at %L must be of type %s",
8311 &e
->where
, gfc_basic_typename (case_expr
->ts
.type
));
8315 /* C805 (R808) For a given case-construct, each case-value shall be of
8316 the same type as case-expr. For character type, length differences
8317 are allowed, but the kind type parameters shall be the same. */
8319 if (case_expr
->ts
.type
== BT_CHARACTER
&& e
->ts
.kind
!= case_expr
->ts
.kind
)
8321 gfc_error ("Expression in CASE statement at %L must be of kind %d",
8322 &e
->where
, case_expr
->ts
.kind
);
8326 /* Convert the case value kind to that of case expression kind,
8329 if (e
->ts
.kind
!= case_expr
->ts
.kind
)
8330 gfc_convert_type_warn (e
, &case_expr
->ts
, 2, 0);
8334 gfc_error ("Expression in CASE statement at %L must be scalar",
8343 /* Given a completely parsed select statement, we:
8345 - Validate all expressions and code within the SELECT.
8346 - Make sure that the selection expression is not of the wrong type.
8347 - Make sure that no case ranges overlap.
8348 - Eliminate unreachable cases and unreachable code resulting from
8349 removing case labels.
8351 The standard does allow unreachable cases, e.g. CASE (5:3). But
8352 they are a hassle for code generation, and to prevent that, we just
8353 cut them out here. This is not necessary for overlapping cases
8354 because they are illegal and we never even try to generate code.
8356 We have the additional caveat that a SELECT construct could have
8357 been a computed GOTO in the source code. Fortunately we can fairly
8358 easily work around that here: The case_expr for a "real" SELECT CASE
8359 is in code->expr1, but for a computed GOTO it is in code->expr2. All
8360 we have to do is make sure that the case_expr is a scalar integer
8364 resolve_select (gfc_code
*code
, bool select_type
)
8367 gfc_expr
*case_expr
;
8368 gfc_case
*cp
, *default_case
, *tail
, *head
;
8369 int seen_unreachable
;
8375 if (code
->expr1
== NULL
)
8377 /* This was actually a computed GOTO statement. */
8378 case_expr
= code
->expr2
;
8379 if (case_expr
->ts
.type
!= BT_INTEGER
|| case_expr
->rank
!= 0)
8380 gfc_error ("Selection expression in computed GOTO statement "
8381 "at %L must be a scalar integer expression",
8384 /* Further checking is not necessary because this SELECT was built
8385 by the compiler, so it should always be OK. Just move the
8386 case_expr from expr2 to expr so that we can handle computed
8387 GOTOs as normal SELECTs from here on. */
8388 code
->expr1
= code
->expr2
;
8393 case_expr
= code
->expr1
;
8394 type
= case_expr
->ts
.type
;
8397 if (type
!= BT_LOGICAL
&& type
!= BT_INTEGER
&& type
!= BT_CHARACTER
)
8399 gfc_error ("Argument of SELECT statement at %L cannot be %s",
8400 &case_expr
->where
, gfc_typename (&case_expr
->ts
));
8402 /* Punt. Going on here just produce more garbage error messages. */
8407 if (!select_type
&& case_expr
->rank
!= 0)
8409 gfc_error ("Argument of SELECT statement at %L must be a scalar "
8410 "expression", &case_expr
->where
);
8416 /* Raise a warning if an INTEGER case value exceeds the range of
8417 the case-expr. Later, all expressions will be promoted to the
8418 largest kind of all case-labels. */
8420 if (type
== BT_INTEGER
)
8421 for (body
= code
->block
; body
; body
= body
->block
)
8422 for (cp
= body
->ext
.block
.case_list
; cp
; cp
= cp
->next
)
8425 && gfc_check_integer_range (cp
->low
->value
.integer
,
8426 case_expr
->ts
.kind
) != ARITH_OK
)
8427 gfc_warning (0, "Expression in CASE statement at %L is "
8428 "not in the range of %s", &cp
->low
->where
,
8429 gfc_typename (&case_expr
->ts
));
8432 && cp
->low
!= cp
->high
8433 && gfc_check_integer_range (cp
->high
->value
.integer
,
8434 case_expr
->ts
.kind
) != ARITH_OK
)
8435 gfc_warning (0, "Expression in CASE statement at %L is "
8436 "not in the range of %s", &cp
->high
->where
,
8437 gfc_typename (&case_expr
->ts
));
8440 /* PR 19168 has a long discussion concerning a mismatch of the kinds
8441 of the SELECT CASE expression and its CASE values. Walk the lists
8442 of case values, and if we find a mismatch, promote case_expr to
8443 the appropriate kind. */
8445 if (type
== BT_LOGICAL
|| type
== BT_INTEGER
)
8447 for (body
= code
->block
; body
; body
= body
->block
)
8449 /* Walk the case label list. */
8450 for (cp
= body
->ext
.block
.case_list
; cp
; cp
= cp
->next
)
8452 /* Intercept the DEFAULT case. It does not have a kind. */
8453 if (cp
->low
== NULL
&& cp
->high
== NULL
)
8456 /* Unreachable case ranges are discarded, so ignore. */
8457 if (cp
->low
!= NULL
&& cp
->high
!= NULL
8458 && cp
->low
!= cp
->high
8459 && gfc_compare_expr (cp
->low
, cp
->high
, INTRINSIC_GT
) > 0)
8463 && case_expr
->ts
.kind
!= gfc_kind_max(case_expr
, cp
->low
))
8464 gfc_convert_type_warn (case_expr
, &cp
->low
->ts
, 2, 0);
8466 if (cp
->high
!= NULL
8467 && case_expr
->ts
.kind
!= gfc_kind_max(case_expr
, cp
->high
))
8468 gfc_convert_type_warn (case_expr
, &cp
->high
->ts
, 2, 0);
8473 /* Assume there is no DEFAULT case. */
8474 default_case
= NULL
;
8479 for (body
= code
->block
; body
; body
= body
->block
)
8481 /* Assume the CASE list is OK, and all CASE labels can be matched. */
8483 seen_unreachable
= 0;
8485 /* Walk the case label list, making sure that all case labels
8487 for (cp
= body
->ext
.block
.case_list
; cp
; cp
= cp
->next
)
8489 /* Count the number of cases in the whole construct. */
8492 /* Intercept the DEFAULT case. */
8493 if (cp
->low
== NULL
&& cp
->high
== NULL
)
8495 if (default_case
!= NULL
)
8497 gfc_error ("The DEFAULT CASE at %L cannot be followed "
8498 "by a second DEFAULT CASE at %L",
8499 &default_case
->where
, &cp
->where
);
8510 /* Deal with single value cases and case ranges. Errors are
8511 issued from the validation function. */
8512 if (!validate_case_label_expr (cp
->low
, case_expr
)
8513 || !validate_case_label_expr (cp
->high
, case_expr
))
8519 if (type
== BT_LOGICAL
8520 && ((cp
->low
== NULL
|| cp
->high
== NULL
)
8521 || cp
->low
!= cp
->high
))
8523 gfc_error ("Logical range in CASE statement at %L is not "
8524 "allowed", &cp
->low
->where
);
8529 if (type
== BT_LOGICAL
&& cp
->low
->expr_type
== EXPR_CONSTANT
)
8532 value
= cp
->low
->value
.logical
== 0 ? 2 : 1;
8533 if (value
& seen_logical
)
8535 gfc_error ("Constant logical value in CASE statement "
8536 "is repeated at %L",
8541 seen_logical
|= value
;
8544 if (cp
->low
!= NULL
&& cp
->high
!= NULL
8545 && cp
->low
!= cp
->high
8546 && gfc_compare_expr (cp
->low
, cp
->high
, INTRINSIC_GT
) > 0)
8548 if (warn_surprising
)
8549 gfc_warning (OPT_Wsurprising
,
8550 "Range specification at %L can never be matched",
8553 cp
->unreachable
= 1;
8554 seen_unreachable
= 1;
8558 /* If the case range can be matched, it can also overlap with
8559 other cases. To make sure it does not, we put it in a
8560 double linked list here. We sort that with a merge sort
8561 later on to detect any overlapping cases. */
8565 head
->right
= head
->left
= NULL
;
8570 tail
->right
->left
= tail
;
8577 /* It there was a failure in the previous case label, give up
8578 for this case label list. Continue with the next block. */
8582 /* See if any case labels that are unreachable have been seen.
8583 If so, we eliminate them. This is a bit of a kludge because
8584 the case lists for a single case statement (label) is a
8585 single forward linked lists. */
8586 if (seen_unreachable
)
8588 /* Advance until the first case in the list is reachable. */
8589 while (body
->ext
.block
.case_list
!= NULL
8590 && body
->ext
.block
.case_list
->unreachable
)
8592 gfc_case
*n
= body
->ext
.block
.case_list
;
8593 body
->ext
.block
.case_list
= body
->ext
.block
.case_list
->next
;
8595 gfc_free_case_list (n
);
8598 /* Strip all other unreachable cases. */
8599 if (body
->ext
.block
.case_list
)
8601 for (cp
= body
->ext
.block
.case_list
; cp
&& cp
->next
; cp
= cp
->next
)
8603 if (cp
->next
->unreachable
)
8605 gfc_case
*n
= cp
->next
;
8606 cp
->next
= cp
->next
->next
;
8608 gfc_free_case_list (n
);
8615 /* See if there were overlapping cases. If the check returns NULL,
8616 there was overlap. In that case we don't do anything. If head
8617 is non-NULL, we prepend the DEFAULT case. The sorted list can
8618 then used during code generation for SELECT CASE constructs with
8619 a case expression of a CHARACTER type. */
8622 head
= check_case_overlap (head
);
8624 /* Prepend the default_case if it is there. */
8625 if (head
!= NULL
&& default_case
)
8627 default_case
->left
= NULL
;
8628 default_case
->right
= head
;
8629 head
->left
= default_case
;
8633 /* Eliminate dead blocks that may be the result if we've seen
8634 unreachable case labels for a block. */
8635 for (body
= code
; body
&& body
->block
; body
= body
->block
)
8637 if (body
->block
->ext
.block
.case_list
== NULL
)
8639 /* Cut the unreachable block from the code chain. */
8640 gfc_code
*c
= body
->block
;
8641 body
->block
= c
->block
;
8643 /* Kill the dead block, but not the blocks below it. */
8645 gfc_free_statements (c
);
8649 /* More than two cases is legal but insane for logical selects.
8650 Issue a warning for it. */
8651 if (warn_surprising
&& type
== BT_LOGICAL
&& ncases
> 2)
8652 gfc_warning (OPT_Wsurprising
,
8653 "Logical SELECT CASE block at %L has more that two cases",
8658 /* Check if a derived type is extensible. */
8661 gfc_type_is_extensible (gfc_symbol
*sym
)
8663 return !(sym
->attr
.is_bind_c
|| sym
->attr
.sequence
8664 || (sym
->attr
.is_class
8665 && sym
->components
->ts
.u
.derived
->attr
.unlimited_polymorphic
));
8670 resolve_types (gfc_namespace
*ns
);
8672 /* Resolve an associate-name: Resolve target and ensure the type-spec is
8673 correct as well as possibly the array-spec. */
8676 resolve_assoc_var (gfc_symbol
* sym
, bool resolve_target
)
8680 gcc_assert (sym
->assoc
);
8681 gcc_assert (sym
->attr
.flavor
== FL_VARIABLE
);
8683 /* If this is for SELECT TYPE, the target may not yet be set. In that
8684 case, return. Resolution will be called later manually again when
8686 target
= sym
->assoc
->target
;
8689 gcc_assert (!sym
->assoc
->dangling
);
8691 if (resolve_target
&& !gfc_resolve_expr (target
))
8694 /* For variable targets, we get some attributes from the target. */
8695 if (target
->expr_type
== EXPR_VARIABLE
)
8699 gcc_assert (target
->symtree
);
8700 tsym
= target
->symtree
->n
.sym
;
8702 sym
->attr
.asynchronous
= tsym
->attr
.asynchronous
;
8703 sym
->attr
.volatile_
= tsym
->attr
.volatile_
;
8705 sym
->attr
.target
= tsym
->attr
.target
8706 || gfc_expr_attr (target
).pointer
;
8707 if (is_subref_array (target
))
8708 sym
->attr
.subref_array_pointer
= 1;
8711 if (target
->expr_type
== EXPR_NULL
)
8713 gfc_error ("Selector at %L cannot be NULL()", &target
->where
);
8716 else if (target
->ts
.type
== BT_UNKNOWN
)
8718 gfc_error ("Selector at %L has no type", &target
->where
);
8722 /* Get type if this was not already set. Note that it can be
8723 some other type than the target in case this is a SELECT TYPE
8724 selector! So we must not update when the type is already there. */
8725 if (sym
->ts
.type
== BT_UNKNOWN
)
8726 sym
->ts
= target
->ts
;
8728 gcc_assert (sym
->ts
.type
!= BT_UNKNOWN
);
8730 /* See if this is a valid association-to-variable. */
8731 sym
->assoc
->variable
= (target
->expr_type
== EXPR_VARIABLE
8732 && !gfc_has_vector_subscript (target
));
8734 /* Finally resolve if this is an array or not. */
8735 if (sym
->attr
.dimension
&& target
->rank
== 0)
8737 /* primary.c makes the assumption that a reference to an associate
8738 name followed by a left parenthesis is an array reference. */
8739 if (sym
->ts
.type
!= BT_CHARACTER
)
8740 gfc_error ("Associate-name %qs at %L is used as array",
8741 sym
->name
, &sym
->declared_at
);
8742 sym
->attr
.dimension
= 0;
8747 /* We cannot deal with class selectors that need temporaries. */
8748 if (target
->ts
.type
== BT_CLASS
8749 && gfc_ref_needs_temporary_p (target
->ref
))
8751 gfc_error ("CLASS selector at %L needs a temporary which is not "
8752 "yet implemented", &target
->where
);
8756 if (target
->ts
.type
== BT_CLASS
)
8757 gfc_fix_class_refs (target
);
8759 if (target
->rank
!= 0)
8762 /* The rank may be incorrectly guessed at parsing, therefore make sure
8763 it is corrected now. */
8764 if (sym
->ts
.type
!= BT_CLASS
&& (!sym
->as
|| sym
->assoc
->rankguessed
))
8767 sym
->as
= gfc_get_array_spec ();
8769 as
->rank
= target
->rank
;
8770 as
->type
= AS_DEFERRED
;
8771 as
->corank
= gfc_get_corank (target
);
8772 sym
->attr
.dimension
= 1;
8773 if (as
->corank
!= 0)
8774 sym
->attr
.codimension
= 1;
8776 else if (sym
->ts
.type
== BT_CLASS
&& (!CLASS_DATA (sym
)->as
|| sym
->assoc
->rankguessed
))
8778 if (!CLASS_DATA (sym
)->as
)
8779 CLASS_DATA (sym
)->as
= gfc_get_array_spec ();
8780 as
= CLASS_DATA (sym
)->as
;
8781 as
->rank
= target
->rank
;
8782 as
->type
= AS_DEFERRED
;
8783 as
->corank
= gfc_get_corank (target
);
8784 CLASS_DATA (sym
)->attr
.dimension
= 1;
8785 if (as
->corank
!= 0)
8786 CLASS_DATA (sym
)->attr
.codimension
= 1;
8791 /* target's rank is 0, but the type of the sym is still array valued,
8792 which has to be corrected. */
8793 if (sym
->ts
.type
== BT_CLASS
8794 && CLASS_DATA (sym
) && CLASS_DATA (sym
)->as
)
8797 symbol_attribute attr
;
8798 /* The associated variable's type is still the array type
8799 correct this now. */
8800 gfc_typespec
*ts
= &target
->ts
;
8803 for (ref
= target
->ref
; ref
!= NULL
; ref
= ref
->next
)
8808 ts
= &ref
->u
.c
.component
->ts
;
8811 if (ts
->type
== BT_CLASS
)
8812 ts
= &ts
->u
.derived
->components
->ts
;
8818 /* Create a scalar instance of the current class type. Because the
8819 rank of a class array goes into its name, the type has to be
8820 rebuild. The alternative of (re-)setting just the attributes
8821 and as in the current type, destroys the type also in other
8825 sym
->ts
.type
= BT_CLASS
;
8826 attr
= CLASS_DATA (sym
)->attr
;
8828 attr
.associate_var
= 1;
8829 attr
.dimension
= attr
.codimension
= 0;
8830 attr
.class_pointer
= 1;
8831 if (!gfc_build_class_symbol (&sym
->ts
, &attr
, &as
))
8833 /* Make sure the _vptr is set. */
8834 c
= gfc_find_component (sym
->ts
.u
.derived
, "_vptr", true, true, NULL
);
8835 if (c
->ts
.u
.derived
== NULL
)
8836 c
->ts
.u
.derived
= gfc_find_derived_vtab (sym
->ts
.u
.derived
);
8837 CLASS_DATA (sym
)->attr
.pointer
= 1;
8838 CLASS_DATA (sym
)->attr
.class_pointer
= 1;
8839 gfc_set_sym_referenced (sym
->ts
.u
.derived
);
8840 gfc_commit_symbol (sym
->ts
.u
.derived
);
8841 /* _vptr now has the _vtab in it, change it to the _vtype. */
8842 if (c
->ts
.u
.derived
->attr
.vtab
)
8843 c
->ts
.u
.derived
= c
->ts
.u
.derived
->ts
.u
.derived
;
8844 c
->ts
.u
.derived
->ns
->types_resolved
= 0;
8845 resolve_types (c
->ts
.u
.derived
->ns
);
8849 /* Mark this as an associate variable. */
8850 sym
->attr
.associate_var
= 1;
8852 /* Fix up the type-spec for CHARACTER types. */
8853 if (sym
->ts
.type
== BT_CHARACTER
&& !sym
->attr
.select_type_temporary
)
8856 sym
->ts
.u
.cl
= target
->ts
.u
.cl
;
8858 if (sym
->ts
.deferred
&& target
->expr_type
== EXPR_VARIABLE
8859 && target
->symtree
->n
.sym
->attr
.dummy
8860 && sym
->ts
.u
.cl
== target
->ts
.u
.cl
)
8862 sym
->ts
.u
.cl
= gfc_new_charlen (sym
->ns
, NULL
);
8863 sym
->ts
.deferred
= 1;
8866 if (!sym
->ts
.u
.cl
->length
8867 && !sym
->ts
.deferred
8868 && target
->expr_type
== EXPR_CONSTANT
)
8870 sym
->ts
.u
.cl
->length
=
8871 gfc_get_int_expr (gfc_charlen_int_kind
, NULL
,
8872 target
->value
.character
.length
);
8874 else if ((!sym
->ts
.u
.cl
->length
8875 || sym
->ts
.u
.cl
->length
->expr_type
!= EXPR_CONSTANT
)
8876 && target
->expr_type
!= EXPR_VARIABLE
)
8878 sym
->ts
.u
.cl
= gfc_new_charlen (sym
->ns
, NULL
);
8879 sym
->ts
.deferred
= 1;
8881 /* This is reset in trans-stmt.c after the assignment
8882 of the target expression to the associate name. */
8883 sym
->attr
.allocatable
= 1;
8887 /* If the target is a good class object, so is the associate variable. */
8888 if (sym
->ts
.type
== BT_CLASS
&& gfc_expr_attr (target
).class_ok
)
8889 sym
->attr
.class_ok
= 1;
8893 /* Ensure that SELECT TYPE expressions have the correct rank and a full
8894 array reference, where necessary. The symbols are artificial and so
8895 the dimension attribute and arrayspec can also be set. In addition,
8896 sometimes the expr1 arrives as BT_DERIVED, when the symbol is BT_CLASS.
8897 This is corrected here as well.*/
8900 fixup_array_ref (gfc_expr
**expr1
, gfc_expr
*expr2
,
8901 int rank
, gfc_ref
*ref
)
8903 gfc_ref
*nref
= (*expr1
)->ref
;
8904 gfc_symbol
*sym1
= (*expr1
)->symtree
->n
.sym
;
8905 gfc_symbol
*sym2
= expr2
? expr2
->symtree
->n
.sym
: NULL
;
8906 (*expr1
)->rank
= rank
;
8907 if (sym1
->ts
.type
== BT_CLASS
)
8909 if ((*expr1
)->ts
.type
!= BT_CLASS
)
8910 (*expr1
)->ts
= sym1
->ts
;
8912 CLASS_DATA (sym1
)->attr
.dimension
= 1;
8913 if (CLASS_DATA (sym1
)->as
== NULL
&& sym2
)
8914 CLASS_DATA (sym1
)->as
8915 = gfc_copy_array_spec (CLASS_DATA (sym2
)->as
);
8919 sym1
->attr
.dimension
= 1;
8920 if (sym1
->as
== NULL
&& sym2
)
8921 sym1
->as
= gfc_copy_array_spec (sym2
->as
);
8924 for (; nref
; nref
= nref
->next
)
8925 if (nref
->next
== NULL
)
8928 if (ref
&& nref
&& nref
->type
!= REF_ARRAY
)
8929 nref
->next
= gfc_copy_ref (ref
);
8930 else if (ref
&& !nref
)
8931 (*expr1
)->ref
= gfc_copy_ref (ref
);
8936 build_loc_call (gfc_expr
*sym_expr
)
8939 loc_call
= gfc_get_expr ();
8940 loc_call
->expr_type
= EXPR_FUNCTION
;
8941 gfc_get_sym_tree ("_loc", gfc_current_ns
, &loc_call
->symtree
, false);
8942 loc_call
->symtree
->n
.sym
->attr
.flavor
= FL_PROCEDURE
;
8943 loc_call
->symtree
->n
.sym
->attr
.intrinsic
= 1;
8944 loc_call
->symtree
->n
.sym
->result
= loc_call
->symtree
->n
.sym
;
8945 gfc_commit_symbol (loc_call
->symtree
->n
.sym
);
8946 loc_call
->ts
.type
= BT_INTEGER
;
8947 loc_call
->ts
.kind
= gfc_index_integer_kind
;
8948 loc_call
->value
.function
.isym
= gfc_intrinsic_function_by_id (GFC_ISYM_LOC
);
8949 loc_call
->value
.function
.actual
= gfc_get_actual_arglist ();
8950 loc_call
->value
.function
.actual
->expr
= sym_expr
;
8951 loc_call
->where
= sym_expr
->where
;
8955 /* Resolve a SELECT TYPE statement. */
8958 resolve_select_type (gfc_code
*code
, gfc_namespace
*old_ns
)
8960 gfc_symbol
*selector_type
;
8961 gfc_code
*body
, *new_st
, *if_st
, *tail
;
8962 gfc_code
*class_is
= NULL
, *default_case
= NULL
;
8965 char name
[GFC_MAX_SYMBOL_LEN
];
8969 gfc_ref
* ref
= NULL
;
8970 gfc_expr
*selector_expr
= NULL
;
8972 ns
= code
->ext
.block
.ns
;
8975 /* Check for F03:C813. */
8976 if (code
->expr1
->ts
.type
!= BT_CLASS
8977 && !(code
->expr2
&& code
->expr2
->ts
.type
== BT_CLASS
))
8979 gfc_error ("Selector shall be polymorphic in SELECT TYPE statement "
8980 "at %L", &code
->loc
);
8984 if (!code
->expr1
->symtree
->n
.sym
->attr
.class_ok
)
8989 gfc_ref
*ref2
= NULL
;
8990 for (ref
= code
->expr2
->ref
; ref
!= NULL
; ref
= ref
->next
)
8991 if (ref
->type
== REF_COMPONENT
8992 && ref
->u
.c
.component
->ts
.type
== BT_CLASS
)
8997 if (code
->expr1
->symtree
->n
.sym
->attr
.untyped
)
8998 code
->expr1
->symtree
->n
.sym
->ts
= ref2
->u
.c
.component
->ts
;
8999 selector_type
= CLASS_DATA (ref2
->u
.c
.component
)->ts
.u
.derived
;
9003 if (code
->expr1
->symtree
->n
.sym
->attr
.untyped
)
9004 code
->expr1
->symtree
->n
.sym
->ts
= code
->expr2
->ts
;
9005 selector_type
= CLASS_DATA (code
->expr2
)->ts
.u
.derived
;
9008 if (code
->expr2
->rank
&& CLASS_DATA (code
->expr1
)->as
)
9009 CLASS_DATA (code
->expr1
)->as
->rank
= code
->expr2
->rank
;
9011 /* F2008: C803 The selector expression must not be coindexed. */
9012 if (gfc_is_coindexed (code
->expr2
))
9014 gfc_error ("Selector at %L must not be coindexed",
9015 &code
->expr2
->where
);
9022 selector_type
= CLASS_DATA (code
->expr1
)->ts
.u
.derived
;
9024 if (gfc_is_coindexed (code
->expr1
))
9026 gfc_error ("Selector at %L must not be coindexed",
9027 &code
->expr1
->where
);
9032 /* Loop over TYPE IS / CLASS IS cases. */
9033 for (body
= code
->block
; body
; body
= body
->block
)
9035 c
= body
->ext
.block
.case_list
;
9039 /* Check for repeated cases. */
9040 for (tail
= code
->block
; tail
; tail
= tail
->block
)
9042 gfc_case
*d
= tail
->ext
.block
.case_list
;
9046 if (c
->ts
.type
== d
->ts
.type
9047 && ((c
->ts
.type
== BT_DERIVED
9048 && c
->ts
.u
.derived
&& d
->ts
.u
.derived
9049 && !strcmp (c
->ts
.u
.derived
->name
,
9050 d
->ts
.u
.derived
->name
))
9051 || c
->ts
.type
== BT_UNKNOWN
9052 || (!(c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
9053 && c
->ts
.kind
== d
->ts
.kind
)))
9055 gfc_error ("TYPE IS at %L overlaps with TYPE IS at %L",
9056 &c
->where
, &d
->where
);
9062 /* Check F03:C815. */
9063 if ((c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
9064 && !selector_type
->attr
.unlimited_polymorphic
9065 && !gfc_type_is_extensible (c
->ts
.u
.derived
))
9067 gfc_error ("Derived type %qs at %L must be extensible",
9068 c
->ts
.u
.derived
->name
, &c
->where
);
9073 /* Check F03:C816. */
9074 if (c
->ts
.type
!= BT_UNKNOWN
&& !selector_type
->attr
.unlimited_polymorphic
9075 && ((c
->ts
.type
!= BT_DERIVED
&& c
->ts
.type
!= BT_CLASS
)
9076 || !gfc_type_is_extension_of (selector_type
, c
->ts
.u
.derived
)))
9078 if (c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
9079 gfc_error ("Derived type %qs at %L must be an extension of %qs",
9080 c
->ts
.u
.derived
->name
, &c
->where
, selector_type
->name
);
9082 gfc_error ("Unexpected intrinsic type %qs at %L",
9083 gfc_basic_typename (c
->ts
.type
), &c
->where
);
9088 /* Check F03:C814. */
9089 if (c
->ts
.type
== BT_CHARACTER
9090 && (c
->ts
.u
.cl
->length
!= NULL
|| c
->ts
.deferred
))
9092 gfc_error ("The type-spec at %L shall specify that each length "
9093 "type parameter is assumed", &c
->where
);
9098 /* Intercept the DEFAULT case. */
9099 if (c
->ts
.type
== BT_UNKNOWN
)
9101 /* Check F03:C818. */
9104 gfc_error ("The DEFAULT CASE at %L cannot be followed "
9105 "by a second DEFAULT CASE at %L",
9106 &default_case
->ext
.block
.case_list
->where
, &c
->where
);
9111 default_case
= body
;
9118 /* Transform SELECT TYPE statement to BLOCK and associate selector to
9119 target if present. If there are any EXIT statements referring to the
9120 SELECT TYPE construct, this is no problem because the gfc_code
9121 reference stays the same and EXIT is equally possible from the BLOCK
9122 it is changed to. */
9123 code
->op
= EXEC_BLOCK
;
9126 gfc_association_list
* assoc
;
9128 assoc
= gfc_get_association_list ();
9129 assoc
->st
= code
->expr1
->symtree
;
9130 assoc
->target
= gfc_copy_expr (code
->expr2
);
9131 assoc
->target
->where
= code
->expr2
->where
;
9132 /* assoc->variable will be set by resolve_assoc_var. */
9134 code
->ext
.block
.assoc
= assoc
;
9135 code
->expr1
->symtree
->n
.sym
->assoc
= assoc
;
9137 resolve_assoc_var (code
->expr1
->symtree
->n
.sym
, false);
9140 code
->ext
.block
.assoc
= NULL
;
9142 /* Ensure that the selector rank and arrayspec are available to
9143 correct expressions in which they might be missing. */
9144 if (code
->expr2
&& code
->expr2
->rank
)
9146 rank
= code
->expr2
->rank
;
9147 for (ref
= code
->expr2
->ref
; ref
; ref
= ref
->next
)
9148 if (ref
->next
== NULL
)
9150 if (ref
&& ref
->type
== REF_ARRAY
)
9151 ref
= gfc_copy_ref (ref
);
9153 /* Fixup expr1 if necessary. */
9155 fixup_array_ref (&code
->expr1
, code
->expr2
, rank
, ref
);
9157 else if (code
->expr1
->rank
)
9159 rank
= code
->expr1
->rank
;
9160 for (ref
= code
->expr1
->ref
; ref
; ref
= ref
->next
)
9161 if (ref
->next
== NULL
)
9163 if (ref
&& ref
->type
== REF_ARRAY
)
9164 ref
= gfc_copy_ref (ref
);
9167 /* Add EXEC_SELECT to switch on type. */
9168 new_st
= gfc_get_code (code
->op
);
9169 new_st
->expr1
= code
->expr1
;
9170 new_st
->expr2
= code
->expr2
;
9171 new_st
->block
= code
->block
;
9172 code
->expr1
= code
->expr2
= NULL
;
9177 ns
->code
->next
= new_st
;
9179 code
->op
= EXEC_SELECT_TYPE
;
9181 /* Use the intrinsic LOC function to generate an integer expression
9182 for the vtable of the selector. Note that the rank of the selector
9183 expression has to be set to zero. */
9184 gfc_add_vptr_component (code
->expr1
);
9185 code
->expr1
->rank
= 0;
9186 code
->expr1
= build_loc_call (code
->expr1
);
9187 selector_expr
= code
->expr1
->value
.function
.actual
->expr
;
9189 /* Loop over TYPE IS / CLASS IS cases. */
9190 for (body
= code
->block
; body
; body
= body
->block
)
9194 c
= body
->ext
.block
.case_list
;
9196 /* Generate an index integer expression for address of the
9197 TYPE/CLASS vtable and store it in c->low. The hash expression
9198 is stored in c->high and is used to resolve intrinsic cases. */
9199 if (c
->ts
.type
!= BT_UNKNOWN
)
9201 if (c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
9203 vtab
= gfc_find_derived_vtab (c
->ts
.u
.derived
);
9205 c
->high
= gfc_get_int_expr (gfc_integer_4_kind
, NULL
,
9206 c
->ts
.u
.derived
->hash_value
);
9210 vtab
= gfc_find_vtab (&c
->ts
);
9211 gcc_assert (vtab
&& CLASS_DATA (vtab
)->initializer
);
9212 e
= CLASS_DATA (vtab
)->initializer
;
9213 c
->high
= gfc_copy_expr (e
);
9214 if (c
->high
->ts
.kind
!= gfc_integer_4_kind
)
9217 ts
.kind
= gfc_integer_4_kind
;
9218 ts
.type
= BT_INTEGER
;
9219 gfc_convert_type_warn (c
->high
, &ts
, 2, 0);
9223 e
= gfc_lval_expr_from_sym (vtab
);
9224 c
->low
= build_loc_call (e
);
9229 /* Associate temporary to selector. This should only be done
9230 when this case is actually true, so build a new ASSOCIATE
9231 that does precisely this here (instead of using the
9234 if (c
->ts
.type
== BT_CLASS
)
9235 sprintf (name
, "__tmp_class_%s", c
->ts
.u
.derived
->name
);
9236 else if (c
->ts
.type
== BT_DERIVED
)
9237 sprintf (name
, "__tmp_type_%s", c
->ts
.u
.derived
->name
);
9238 else if (c
->ts
.type
== BT_CHARACTER
)
9240 HOST_WIDE_INT charlen
= 0;
9241 if (c
->ts
.u
.cl
&& c
->ts
.u
.cl
->length
9242 && c
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
)
9243 charlen
= gfc_mpz_get_hwi (c
->ts
.u
.cl
->length
->value
.integer
);
9244 snprintf (name
, sizeof (name
),
9245 "__tmp_%s_" HOST_WIDE_INT_PRINT_DEC
"_%d",
9246 gfc_basic_typename (c
->ts
.type
), charlen
, c
->ts
.kind
);
9249 sprintf (name
, "__tmp_%s_%d", gfc_basic_typename (c
->ts
.type
),
9252 st
= gfc_find_symtree (ns
->sym_root
, name
);
9253 gcc_assert (st
->n
.sym
->assoc
);
9254 st
->n
.sym
->assoc
->target
= gfc_get_variable_expr (selector_expr
->symtree
);
9255 st
->n
.sym
->assoc
->target
->where
= selector_expr
->where
;
9256 if (c
->ts
.type
!= BT_CLASS
&& c
->ts
.type
!= BT_UNKNOWN
)
9258 gfc_add_data_component (st
->n
.sym
->assoc
->target
);
9259 /* Fixup the target expression if necessary. */
9261 fixup_array_ref (&st
->n
.sym
->assoc
->target
, NULL
, rank
, ref
);
9264 new_st
= gfc_get_code (EXEC_BLOCK
);
9265 new_st
->ext
.block
.ns
= gfc_build_block_ns (ns
);
9266 new_st
->ext
.block
.ns
->code
= body
->next
;
9267 body
->next
= new_st
;
9269 /* Chain in the new list only if it is marked as dangling. Otherwise
9270 there is a CASE label overlap and this is already used. Just ignore,
9271 the error is diagnosed elsewhere. */
9272 if (st
->n
.sym
->assoc
->dangling
)
9274 new_st
->ext
.block
.assoc
= st
->n
.sym
->assoc
;
9275 st
->n
.sym
->assoc
->dangling
= 0;
9278 resolve_assoc_var (st
->n
.sym
, false);
9281 /* Take out CLASS IS cases for separate treatment. */
9283 while (body
&& body
->block
)
9285 if (body
->block
->ext
.block
.case_list
->ts
.type
== BT_CLASS
)
9287 /* Add to class_is list. */
9288 if (class_is
== NULL
)
9290 class_is
= body
->block
;
9295 for (tail
= class_is
; tail
->block
; tail
= tail
->block
) ;
9296 tail
->block
= body
->block
;
9299 /* Remove from EXEC_SELECT list. */
9300 body
->block
= body
->block
->block
;
9313 /* Add a default case to hold the CLASS IS cases. */
9314 for (tail
= code
; tail
->block
; tail
= tail
->block
) ;
9315 tail
->block
= gfc_get_code (EXEC_SELECT_TYPE
);
9317 tail
->ext
.block
.case_list
= gfc_get_case ();
9318 tail
->ext
.block
.case_list
->ts
.type
= BT_UNKNOWN
;
9320 default_case
= tail
;
9323 /* More than one CLASS IS block? */
9324 if (class_is
->block
)
9328 /* Sort CLASS IS blocks by extension level. */
9332 for (c1
= &class_is
; (*c1
) && (*c1
)->block
; c1
= &((*c1
)->block
))
9335 /* F03:C817 (check for doubles). */
9336 if ((*c1
)->ext
.block
.case_list
->ts
.u
.derived
->hash_value
9337 == c2
->ext
.block
.case_list
->ts
.u
.derived
->hash_value
)
9339 gfc_error ("Double CLASS IS block in SELECT TYPE "
9341 &c2
->ext
.block
.case_list
->where
);
9344 if ((*c1
)->ext
.block
.case_list
->ts
.u
.derived
->attr
.extension
9345 < c2
->ext
.block
.case_list
->ts
.u
.derived
->attr
.extension
)
9348 (*c1
)->block
= c2
->block
;
9358 /* Generate IF chain. */
9359 if_st
= gfc_get_code (EXEC_IF
);
9361 for (body
= class_is
; body
; body
= body
->block
)
9363 new_st
->block
= gfc_get_code (EXEC_IF
);
9364 new_st
= new_st
->block
;
9365 /* Set up IF condition: Call _gfortran_is_extension_of. */
9366 new_st
->expr1
= gfc_get_expr ();
9367 new_st
->expr1
->expr_type
= EXPR_FUNCTION
;
9368 new_st
->expr1
->ts
.type
= BT_LOGICAL
;
9369 new_st
->expr1
->ts
.kind
= 4;
9370 new_st
->expr1
->value
.function
.name
= gfc_get_string (PREFIX ("is_extension_of"));
9371 new_st
->expr1
->value
.function
.isym
= XCNEW (gfc_intrinsic_sym
);
9372 new_st
->expr1
->value
.function
.isym
->id
= GFC_ISYM_EXTENDS_TYPE_OF
;
9373 /* Set up arguments. */
9374 new_st
->expr1
->value
.function
.actual
= gfc_get_actual_arglist ();
9375 new_st
->expr1
->value
.function
.actual
->expr
= gfc_get_variable_expr (selector_expr
->symtree
);
9376 new_st
->expr1
->value
.function
.actual
->expr
->where
= code
->loc
;
9377 new_st
->expr1
->where
= code
->loc
;
9378 gfc_add_vptr_component (new_st
->expr1
->value
.function
.actual
->expr
);
9379 vtab
= gfc_find_derived_vtab (body
->ext
.block
.case_list
->ts
.u
.derived
);
9380 st
= gfc_find_symtree (vtab
->ns
->sym_root
, vtab
->name
);
9381 new_st
->expr1
->value
.function
.actual
->next
= gfc_get_actual_arglist ();
9382 new_st
->expr1
->value
.function
.actual
->next
->expr
= gfc_get_variable_expr (st
);
9383 new_st
->expr1
->value
.function
.actual
->next
->expr
->where
= code
->loc
;
9384 new_st
->next
= body
->next
;
9386 if (default_case
->next
)
9388 new_st
->block
= gfc_get_code (EXEC_IF
);
9389 new_st
= new_st
->block
;
9390 new_st
->next
= default_case
->next
;
9393 /* Replace CLASS DEFAULT code by the IF chain. */
9394 default_case
->next
= if_st
;
9397 /* Resolve the internal code. This cannot be done earlier because
9398 it requires that the sym->assoc of selectors is set already. */
9399 gfc_current_ns
= ns
;
9400 gfc_resolve_blocks (code
->block
, gfc_current_ns
);
9401 gfc_current_ns
= old_ns
;
9408 /* Resolve a transfer statement. This is making sure that:
9409 -- a derived type being transferred has only non-pointer components
9410 -- a derived type being transferred doesn't have private components, unless
9411 it's being transferred from the module where the type was defined
9412 -- we're not trying to transfer a whole assumed size array. */
9415 resolve_transfer (gfc_code
*code
)
9417 gfc_symbol
*sym
, *derived
;
9421 bool formatted
= false;
9422 gfc_dt
*dt
= code
->ext
.dt
;
9423 gfc_symbol
*dtio_sub
= NULL
;
9427 while (exp
!= NULL
&& exp
->expr_type
== EXPR_OP
9428 && exp
->value
.op
.op
== INTRINSIC_PARENTHESES
)
9429 exp
= exp
->value
.op
.op1
;
9431 if (exp
&& exp
->expr_type
== EXPR_NULL
9434 gfc_error ("Invalid context for NULL () intrinsic at %L",
9439 if (exp
== NULL
|| (exp
->expr_type
!= EXPR_VARIABLE
9440 && exp
->expr_type
!= EXPR_FUNCTION
9441 && exp
->expr_type
!= EXPR_STRUCTURE
))
9444 /* If we are reading, the variable will be changed. Note that
9445 code->ext.dt may be NULL if the TRANSFER is related to
9446 an INQUIRE statement -- but in this case, we are not reading, either. */
9447 if (dt
&& dt
->dt_io_kind
->value
.iokind
== M_READ
9448 && !gfc_check_vardef_context (exp
, false, false, false,
9452 const gfc_typespec
*ts
= exp
->expr_type
== EXPR_STRUCTURE
9453 || exp
->expr_type
== EXPR_FUNCTION
9454 ? &exp
->ts
: &exp
->symtree
->n
.sym
->ts
;
9456 /* Go to actual component transferred. */
9457 for (ref
= exp
->ref
; ref
; ref
= ref
->next
)
9458 if (ref
->type
== REF_COMPONENT
)
9459 ts
= &ref
->u
.c
.component
->ts
;
9461 if (dt
&& dt
->dt_io_kind
->value
.iokind
!= M_INQUIRE
9462 && (ts
->type
== BT_DERIVED
|| ts
->type
== BT_CLASS
))
9464 derived
= ts
->u
.derived
;
9466 /* Determine when to use the formatted DTIO procedure. */
9467 if (dt
&& (dt
->format_expr
|| dt
->format_label
))
9470 write
= dt
->dt_io_kind
->value
.iokind
== M_WRITE
9471 || dt
->dt_io_kind
->value
.iokind
== M_PRINT
;
9472 dtio_sub
= gfc_find_specific_dtio_proc (derived
, write
, formatted
);
9474 if (dtio_sub
!= NULL
&& exp
->expr_type
== EXPR_VARIABLE
)
9477 sym
= exp
->symtree
->n
.sym
->ns
->proc_name
;
9478 /* Check to see if this is a nested DTIO call, with the
9479 dummy as the io-list object. */
9480 if (sym
&& sym
== dtio_sub
&& sym
->formal
9481 && sym
->formal
->sym
== exp
->symtree
->n
.sym
9482 && exp
->ref
== NULL
)
9484 if (!sym
->attr
.recursive
)
9486 gfc_error ("DTIO %s procedure at %L must be recursive",
9487 sym
->name
, &sym
->declared_at
);
9494 if (ts
->type
== BT_CLASS
&& dtio_sub
== NULL
)
9496 gfc_error ("Data transfer element at %L cannot be polymorphic unless "
9497 "it is processed by a defined input/output procedure",
9502 if (ts
->type
== BT_DERIVED
)
9504 /* Check that transferred derived type doesn't contain POINTER
9505 components unless it is processed by a defined input/output
9507 if (ts
->u
.derived
->attr
.pointer_comp
&& dtio_sub
== NULL
)
9509 gfc_error ("Data transfer element at %L cannot have POINTER "
9510 "components unless it is processed by a defined "
9511 "input/output procedure", &code
->loc
);
9516 if (ts
->u
.derived
->attr
.proc_pointer_comp
)
9518 gfc_error ("Data transfer element at %L cannot have "
9519 "procedure pointer components", &code
->loc
);
9523 if (ts
->u
.derived
->attr
.alloc_comp
&& dtio_sub
== NULL
)
9525 gfc_error ("Data transfer element at %L cannot have ALLOCATABLE "
9526 "components unless it is processed by a defined "
9527 "input/output procedure", &code
->loc
);
9531 /* C_PTR and C_FUNPTR have private components which means they cannot
9532 be printed. However, if -std=gnu and not -pedantic, allow
9533 the component to be printed to help debugging. */
9534 if (ts
->u
.derived
->ts
.f90_type
== BT_VOID
)
9536 if (!gfc_notify_std (GFC_STD_GNU
, "Data transfer element at %L "
9537 "cannot have PRIVATE components", &code
->loc
))
9540 else if (derived_inaccessible (ts
->u
.derived
) && dtio_sub
== NULL
)
9542 gfc_error ("Data transfer element at %L cannot have "
9543 "PRIVATE components unless it is processed by "
9544 "a defined input/output procedure", &code
->loc
);
9549 if (exp
->expr_type
== EXPR_STRUCTURE
)
9552 sym
= exp
->symtree
->n
.sym
;
9554 if (sym
->as
!= NULL
&& sym
->as
->type
== AS_ASSUMED_SIZE
&& exp
->ref
9555 && exp
->ref
->type
== REF_ARRAY
&& exp
->ref
->u
.ar
.type
== AR_FULL
)
9557 gfc_error ("Data transfer element at %L cannot be a full reference to "
9558 "an assumed-size array", &code
->loc
);
9562 if (async_io_dt
&& exp
->expr_type
== EXPR_VARIABLE
)
9563 exp
->symtree
->n
.sym
->attr
.asynchronous
= 1;
9567 /*********** Toplevel code resolution subroutines ***********/
9569 /* Find the set of labels that are reachable from this block. We also
9570 record the last statement in each block. */
9573 find_reachable_labels (gfc_code
*block
)
9580 cs_base
->reachable_labels
= bitmap_alloc (&labels_obstack
);
9582 /* Collect labels in this block. We don't keep those corresponding
9583 to END {IF|SELECT}, these are checked in resolve_branch by going
9584 up through the code_stack. */
9585 for (c
= block
; c
; c
= c
->next
)
9587 if (c
->here
&& c
->op
!= EXEC_END_NESTED_BLOCK
)
9588 bitmap_set_bit (cs_base
->reachable_labels
, c
->here
->value
);
9591 /* Merge with labels from parent block. */
9594 gcc_assert (cs_base
->prev
->reachable_labels
);
9595 bitmap_ior_into (cs_base
->reachable_labels
,
9596 cs_base
->prev
->reachable_labels
);
9602 resolve_lock_unlock_event (gfc_code
*code
)
9604 if (code
->expr1
->expr_type
== EXPR_FUNCTION
9605 && code
->expr1
->value
.function
.isym
9606 && code
->expr1
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
)
9607 remove_caf_get_intrinsic (code
->expr1
);
9609 if ((code
->op
== EXEC_LOCK
|| code
->op
== EXEC_UNLOCK
)
9610 && (code
->expr1
->ts
.type
!= BT_DERIVED
9611 || code
->expr1
->expr_type
!= EXPR_VARIABLE
9612 || code
->expr1
->ts
.u
.derived
->from_intmod
!= INTMOD_ISO_FORTRAN_ENV
9613 || code
->expr1
->ts
.u
.derived
->intmod_sym_id
!= ISOFORTRAN_LOCK_TYPE
9614 || code
->expr1
->rank
!= 0
9615 || (!gfc_is_coarray (code
->expr1
) &&
9616 !gfc_is_coindexed (code
->expr1
))))
9617 gfc_error ("Lock variable at %L must be a scalar of type LOCK_TYPE",
9618 &code
->expr1
->where
);
9619 else if ((code
->op
== EXEC_EVENT_POST
|| code
->op
== EXEC_EVENT_WAIT
)
9620 && (code
->expr1
->ts
.type
!= BT_DERIVED
9621 || code
->expr1
->expr_type
!= EXPR_VARIABLE
9622 || code
->expr1
->ts
.u
.derived
->from_intmod
9623 != INTMOD_ISO_FORTRAN_ENV
9624 || code
->expr1
->ts
.u
.derived
->intmod_sym_id
9625 != ISOFORTRAN_EVENT_TYPE
9626 || code
->expr1
->rank
!= 0))
9627 gfc_error ("Event variable at %L must be a scalar of type EVENT_TYPE",
9628 &code
->expr1
->where
);
9629 else if (code
->op
== EXEC_EVENT_POST
&& !gfc_is_coarray (code
->expr1
)
9630 && !gfc_is_coindexed (code
->expr1
))
9631 gfc_error ("Event variable argument at %L must be a coarray or coindexed",
9632 &code
->expr1
->where
);
9633 else if (code
->op
== EXEC_EVENT_WAIT
&& !gfc_is_coarray (code
->expr1
))
9634 gfc_error ("Event variable argument at %L must be a coarray but not "
9635 "coindexed", &code
->expr1
->where
);
9639 && (code
->expr2
->ts
.type
!= BT_INTEGER
|| code
->expr2
->rank
!= 0
9640 || code
->expr2
->expr_type
!= EXPR_VARIABLE
))
9641 gfc_error ("STAT= argument at %L must be a scalar INTEGER variable",
9642 &code
->expr2
->where
);
9645 && !gfc_check_vardef_context (code
->expr2
, false, false, false,
9646 _("STAT variable")))
9651 && (code
->expr3
->ts
.type
!= BT_CHARACTER
|| code
->expr3
->rank
!= 0
9652 || code
->expr3
->expr_type
!= EXPR_VARIABLE
))
9653 gfc_error ("ERRMSG= argument at %L must be a scalar CHARACTER variable",
9654 &code
->expr3
->where
);
9657 && !gfc_check_vardef_context (code
->expr3
, false, false, false,
9658 _("ERRMSG variable")))
9661 /* Check for LOCK the ACQUIRED_LOCK. */
9662 if (code
->op
!= EXEC_EVENT_WAIT
&& code
->expr4
9663 && (code
->expr4
->ts
.type
!= BT_LOGICAL
|| code
->expr4
->rank
!= 0
9664 || code
->expr4
->expr_type
!= EXPR_VARIABLE
))
9665 gfc_error ("ACQUIRED_LOCK= argument at %L must be a scalar LOGICAL "
9666 "variable", &code
->expr4
->where
);
9668 if (code
->op
!= EXEC_EVENT_WAIT
&& code
->expr4
9669 && !gfc_check_vardef_context (code
->expr4
, false, false, false,
9670 _("ACQUIRED_LOCK variable")))
9673 /* Check for EVENT WAIT the UNTIL_COUNT. */
9674 if (code
->op
== EXEC_EVENT_WAIT
&& code
->expr4
)
9676 if (!gfc_resolve_expr (code
->expr4
) || code
->expr4
->ts
.type
!= BT_INTEGER
9677 || code
->expr4
->rank
!= 0)
9678 gfc_error ("UNTIL_COUNT= argument at %L must be a scalar INTEGER "
9679 "expression", &code
->expr4
->where
);
9685 resolve_critical (gfc_code
*code
)
9687 gfc_symtree
*symtree
;
9688 gfc_symbol
*lock_type
;
9689 char name
[GFC_MAX_SYMBOL_LEN
];
9690 static int serial
= 0;
9692 if (flag_coarray
!= GFC_FCOARRAY_LIB
)
9695 symtree
= gfc_find_symtree (gfc_current_ns
->sym_root
,
9696 GFC_PREFIX ("lock_type"));
9698 lock_type
= symtree
->n
.sym
;
9701 if (gfc_get_sym_tree (GFC_PREFIX ("lock_type"), gfc_current_ns
, &symtree
,
9704 lock_type
= symtree
->n
.sym
;
9705 lock_type
->attr
.flavor
= FL_DERIVED
;
9706 lock_type
->attr
.zero_comp
= 1;
9707 lock_type
->from_intmod
= INTMOD_ISO_FORTRAN_ENV
;
9708 lock_type
->intmod_sym_id
= ISOFORTRAN_LOCK_TYPE
;
9711 sprintf(name
, GFC_PREFIX ("lock_var") "%d",serial
++);
9712 if (gfc_get_sym_tree (name
, gfc_current_ns
, &symtree
, false) != 0)
9715 code
->resolved_sym
= symtree
->n
.sym
;
9716 symtree
->n
.sym
->attr
.flavor
= FL_VARIABLE
;
9717 symtree
->n
.sym
->attr
.referenced
= 1;
9718 symtree
->n
.sym
->attr
.artificial
= 1;
9719 symtree
->n
.sym
->attr
.codimension
= 1;
9720 symtree
->n
.sym
->ts
.type
= BT_DERIVED
;
9721 symtree
->n
.sym
->ts
.u
.derived
= lock_type
;
9722 symtree
->n
.sym
->as
= gfc_get_array_spec ();
9723 symtree
->n
.sym
->as
->corank
= 1;
9724 symtree
->n
.sym
->as
->type
= AS_EXPLICIT
;
9725 symtree
->n
.sym
->as
->cotype
= AS_EXPLICIT
;
9726 symtree
->n
.sym
->as
->lower
[0] = gfc_get_int_expr (gfc_default_integer_kind
,
9728 gfc_commit_symbols();
9733 resolve_sync (gfc_code
*code
)
9735 /* Check imageset. The * case matches expr1 == NULL. */
9738 if (code
->expr1
->ts
.type
!= BT_INTEGER
|| code
->expr1
->rank
> 1)
9739 gfc_error ("Imageset argument at %L must be a scalar or rank-1 "
9740 "INTEGER expression", &code
->expr1
->where
);
9741 if (code
->expr1
->expr_type
== EXPR_CONSTANT
&& code
->expr1
->rank
== 0
9742 && mpz_cmp_si (code
->expr1
->value
.integer
, 1) < 0)
9743 gfc_error ("Imageset argument at %L must between 1 and num_images()",
9744 &code
->expr1
->where
);
9745 else if (code
->expr1
->expr_type
== EXPR_ARRAY
9746 && gfc_simplify_expr (code
->expr1
, 0))
9748 gfc_constructor
*cons
;
9749 cons
= gfc_constructor_first (code
->expr1
->value
.constructor
);
9750 for (; cons
; cons
= gfc_constructor_next (cons
))
9751 if (cons
->expr
->expr_type
== EXPR_CONSTANT
9752 && mpz_cmp_si (cons
->expr
->value
.integer
, 1) < 0)
9753 gfc_error ("Imageset argument at %L must between 1 and "
9754 "num_images()", &cons
->expr
->where
);
9759 gfc_resolve_expr (code
->expr2
);
9761 && (code
->expr2
->ts
.type
!= BT_INTEGER
|| code
->expr2
->rank
!= 0
9762 || code
->expr2
->expr_type
!= EXPR_VARIABLE
))
9763 gfc_error ("STAT= argument at %L must be a scalar INTEGER variable",
9764 &code
->expr2
->where
);
9767 gfc_resolve_expr (code
->expr3
);
9769 && (code
->expr3
->ts
.type
!= BT_CHARACTER
|| code
->expr3
->rank
!= 0
9770 || code
->expr3
->expr_type
!= EXPR_VARIABLE
))
9771 gfc_error ("ERRMSG= argument at %L must be a scalar CHARACTER variable",
9772 &code
->expr3
->where
);
9776 /* Given a branch to a label, see if the branch is conforming.
9777 The code node describes where the branch is located. */
9780 resolve_branch (gfc_st_label
*label
, gfc_code
*code
)
9787 /* Step one: is this a valid branching target? */
9789 if (label
->defined
== ST_LABEL_UNKNOWN
)
9791 gfc_error ("Label %d referenced at %L is never defined", label
->value
,
9796 if (label
->defined
!= ST_LABEL_TARGET
&& label
->defined
!= ST_LABEL_DO_TARGET
)
9798 gfc_error ("Statement at %L is not a valid branch target statement "
9799 "for the branch statement at %L", &label
->where
, &code
->loc
);
9803 /* Step two: make sure this branch is not a branch to itself ;-) */
9805 if (code
->here
== label
)
9808 "Branch at %L may result in an infinite loop", &code
->loc
);
9812 /* Step three: See if the label is in the same block as the
9813 branching statement. The hard work has been done by setting up
9814 the bitmap reachable_labels. */
9816 if (bitmap_bit_p (cs_base
->reachable_labels
, label
->value
))
9818 /* Check now whether there is a CRITICAL construct; if so, check
9819 whether the label is still visible outside of the CRITICAL block,
9820 which is invalid. */
9821 for (stack
= cs_base
; stack
; stack
= stack
->prev
)
9823 if (stack
->current
->op
== EXEC_CRITICAL
9824 && bitmap_bit_p (stack
->reachable_labels
, label
->value
))
9825 gfc_error ("GOTO statement at %L leaves CRITICAL construct for "
9826 "label at %L", &code
->loc
, &label
->where
);
9827 else if (stack
->current
->op
== EXEC_DO_CONCURRENT
9828 && bitmap_bit_p (stack
->reachable_labels
, label
->value
))
9829 gfc_error ("GOTO statement at %L leaves DO CONCURRENT construct "
9830 "for label at %L", &code
->loc
, &label
->where
);
9836 /* Step four: If we haven't found the label in the bitmap, it may
9837 still be the label of the END of the enclosing block, in which
9838 case we find it by going up the code_stack. */
9840 for (stack
= cs_base
; stack
; stack
= stack
->prev
)
9842 if (stack
->current
->next
&& stack
->current
->next
->here
== label
)
9844 if (stack
->current
->op
== EXEC_CRITICAL
)
9846 /* Note: A label at END CRITICAL does not leave the CRITICAL
9847 construct as END CRITICAL is still part of it. */
9848 gfc_error ("GOTO statement at %L leaves CRITICAL construct for label"
9849 " at %L", &code
->loc
, &label
->where
);
9852 else if (stack
->current
->op
== EXEC_DO_CONCURRENT
)
9854 gfc_error ("GOTO statement at %L leaves DO CONCURRENT construct for "
9855 "label at %L", &code
->loc
, &label
->where
);
9862 gcc_assert (stack
->current
->next
->op
== EXEC_END_NESTED_BLOCK
);
9866 /* The label is not in an enclosing block, so illegal. This was
9867 allowed in Fortran 66, so we allow it as extension. No
9868 further checks are necessary in this case. */
9869 gfc_notify_std (GFC_STD_LEGACY
, "Label at %L is not in the same block "
9870 "as the GOTO statement at %L", &label
->where
,
9876 /* Check whether EXPR1 has the same shape as EXPR2. */
9879 resolve_where_shape (gfc_expr
*expr1
, gfc_expr
*expr2
)
9881 mpz_t shape
[GFC_MAX_DIMENSIONS
];
9882 mpz_t shape2
[GFC_MAX_DIMENSIONS
];
9883 bool result
= false;
9886 /* Compare the rank. */
9887 if (expr1
->rank
!= expr2
->rank
)
9890 /* Compare the size of each dimension. */
9891 for (i
=0; i
<expr1
->rank
; i
++)
9893 if (!gfc_array_dimen_size (expr1
, i
, &shape
[i
]))
9896 if (!gfc_array_dimen_size (expr2
, i
, &shape2
[i
]))
9899 if (mpz_cmp (shape
[i
], shape2
[i
]))
9903 /* When either of the two expression is an assumed size array, we
9904 ignore the comparison of dimension sizes. */
9909 gfc_clear_shape (shape
, i
);
9910 gfc_clear_shape (shape2
, i
);
9915 /* Check whether a WHERE assignment target or a WHERE mask expression
9916 has the same shape as the outmost WHERE mask expression. */
9919 resolve_where (gfc_code
*code
, gfc_expr
*mask
)
9925 cblock
= code
->block
;
9927 /* Store the first WHERE mask-expr of the WHERE statement or construct.
9928 In case of nested WHERE, only the outmost one is stored. */
9929 if (mask
== NULL
) /* outmost WHERE */
9931 else /* inner WHERE */
9938 /* Check if the mask-expr has a consistent shape with the
9939 outmost WHERE mask-expr. */
9940 if (!resolve_where_shape (cblock
->expr1
, e
))
9941 gfc_error ("WHERE mask at %L has inconsistent shape",
9942 &cblock
->expr1
->where
);
9945 /* the assignment statement of a WHERE statement, or the first
9946 statement in where-body-construct of a WHERE construct */
9947 cnext
= cblock
->next
;
9952 /* WHERE assignment statement */
9955 /* Check shape consistent for WHERE assignment target. */
9956 if (e
&& !resolve_where_shape (cnext
->expr1
, e
))
9957 gfc_error ("WHERE assignment target at %L has "
9958 "inconsistent shape", &cnext
->expr1
->where
);
9962 case EXEC_ASSIGN_CALL
:
9963 resolve_call (cnext
);
9964 if (!cnext
->resolved_sym
->attr
.elemental
)
9965 gfc_error("Non-ELEMENTAL user-defined assignment in WHERE at %L",
9966 &cnext
->ext
.actual
->expr
->where
);
9969 /* WHERE or WHERE construct is part of a where-body-construct */
9971 resolve_where (cnext
, e
);
9975 gfc_error ("Unsupported statement inside WHERE at %L",
9978 /* the next statement within the same where-body-construct */
9979 cnext
= cnext
->next
;
9981 /* the next masked-elsewhere-stmt, elsewhere-stmt, or end-where-stmt */
9982 cblock
= cblock
->block
;
9987 /* Resolve assignment in FORALL construct.
9988 NVAR is the number of FORALL index variables, and VAR_EXPR records the
9989 FORALL index variables. */
9992 gfc_resolve_assign_in_forall (gfc_code
*code
, int nvar
, gfc_expr
**var_expr
)
9996 for (n
= 0; n
< nvar
; n
++)
9998 gfc_symbol
*forall_index
;
10000 forall_index
= var_expr
[n
]->symtree
->n
.sym
;
10002 /* Check whether the assignment target is one of the FORALL index
10004 if ((code
->expr1
->expr_type
== EXPR_VARIABLE
)
10005 && (code
->expr1
->symtree
->n
.sym
== forall_index
))
10006 gfc_error ("Assignment to a FORALL index variable at %L",
10007 &code
->expr1
->where
);
10010 /* If one of the FORALL index variables doesn't appear in the
10011 assignment variable, then there could be a many-to-one
10012 assignment. Emit a warning rather than an error because the
10013 mask could be resolving this problem. */
10014 if (!find_forall_index (code
->expr1
, forall_index
, 0))
10015 gfc_warning (0, "The FORALL with index %qs is not used on the "
10016 "left side of the assignment at %L and so might "
10017 "cause multiple assignment to this object",
10018 var_expr
[n
]->symtree
->name
, &code
->expr1
->where
);
10024 /* Resolve WHERE statement in FORALL construct. */
10027 gfc_resolve_where_code_in_forall (gfc_code
*code
, int nvar
,
10028 gfc_expr
**var_expr
)
10033 cblock
= code
->block
;
10036 /* the assignment statement of a WHERE statement, or the first
10037 statement in where-body-construct of a WHERE construct */
10038 cnext
= cblock
->next
;
10043 /* WHERE assignment statement */
10045 gfc_resolve_assign_in_forall (cnext
, nvar
, var_expr
);
10048 /* WHERE operator assignment statement */
10049 case EXEC_ASSIGN_CALL
:
10050 resolve_call (cnext
);
10051 if (!cnext
->resolved_sym
->attr
.elemental
)
10052 gfc_error("Non-ELEMENTAL user-defined assignment in WHERE at %L",
10053 &cnext
->ext
.actual
->expr
->where
);
10056 /* WHERE or WHERE construct is part of a where-body-construct */
10058 gfc_resolve_where_code_in_forall (cnext
, nvar
, var_expr
);
10062 gfc_error ("Unsupported statement inside WHERE at %L",
10065 /* the next statement within the same where-body-construct */
10066 cnext
= cnext
->next
;
10068 /* the next masked-elsewhere-stmt, elsewhere-stmt, or end-where-stmt */
10069 cblock
= cblock
->block
;
10074 /* Traverse the FORALL body to check whether the following errors exist:
10075 1. For assignment, check if a many-to-one assignment happens.
10076 2. For WHERE statement, check the WHERE body to see if there is any
10077 many-to-one assignment. */
10080 gfc_resolve_forall_body (gfc_code
*code
, int nvar
, gfc_expr
**var_expr
)
10084 c
= code
->block
->next
;
10090 case EXEC_POINTER_ASSIGN
:
10091 gfc_resolve_assign_in_forall (c
, nvar
, var_expr
);
10094 case EXEC_ASSIGN_CALL
:
10098 /* Because the gfc_resolve_blocks() will handle the nested FORALL,
10099 there is no need to handle it here. */
10103 gfc_resolve_where_code_in_forall(c
, nvar
, var_expr
);
10108 /* The next statement in the FORALL body. */
10114 /* Counts the number of iterators needed inside a forall construct, including
10115 nested forall constructs. This is used to allocate the needed memory
10116 in gfc_resolve_forall. */
10119 gfc_count_forall_iterators (gfc_code
*code
)
10121 int max_iters
, sub_iters
, current_iters
;
10122 gfc_forall_iterator
*fa
;
10124 gcc_assert(code
->op
== EXEC_FORALL
);
10128 for (fa
= code
->ext
.forall_iterator
; fa
; fa
= fa
->next
)
10131 code
= code
->block
->next
;
10135 if (code
->op
== EXEC_FORALL
)
10137 sub_iters
= gfc_count_forall_iterators (code
);
10138 if (sub_iters
> max_iters
)
10139 max_iters
= sub_iters
;
10144 return current_iters
+ max_iters
;
10148 /* Given a FORALL construct, first resolve the FORALL iterator, then call
10149 gfc_resolve_forall_body to resolve the FORALL body. */
10152 gfc_resolve_forall (gfc_code
*code
, gfc_namespace
*ns
, int forall_save
)
10154 static gfc_expr
**var_expr
;
10155 static int total_var
= 0;
10156 static int nvar
= 0;
10157 int i
, old_nvar
, tmp
;
10158 gfc_forall_iterator
*fa
;
10162 if (!gfc_notify_std (GFC_STD_F2018_OBS
, "FORALL construct at %L", &code
->loc
))
10165 /* Start to resolve a FORALL construct */
10166 if (forall_save
== 0)
10168 /* Count the total number of FORALL indices in the nested FORALL
10169 construct in order to allocate the VAR_EXPR with proper size. */
10170 total_var
= gfc_count_forall_iterators (code
);
10172 /* Allocate VAR_EXPR with NUMBER_OF_FORALL_INDEX elements. */
10173 var_expr
= XCNEWVEC (gfc_expr
*, total_var
);
10176 /* The information about FORALL iterator, including FORALL indices start, end
10177 and stride. An outer FORALL indice cannot appear in start, end or stride. */
10178 for (fa
= code
->ext
.forall_iterator
; fa
; fa
= fa
->next
)
10180 /* Fortran 20008: C738 (R753). */
10181 if (fa
->var
->ref
&& fa
->var
->ref
->type
== REF_ARRAY
)
10183 gfc_error ("FORALL index-name at %L must be a scalar variable "
10184 "of type integer", &fa
->var
->where
);
10188 /* Check if any outer FORALL index name is the same as the current
10190 for (i
= 0; i
< nvar
; i
++)
10192 if (fa
->var
->symtree
->n
.sym
== var_expr
[i
]->symtree
->n
.sym
)
10193 gfc_error ("An outer FORALL construct already has an index "
10194 "with this name %L", &fa
->var
->where
);
10197 /* Record the current FORALL index. */
10198 var_expr
[nvar
] = gfc_copy_expr (fa
->var
);
10202 /* No memory leak. */
10203 gcc_assert (nvar
<= total_var
);
10206 /* Resolve the FORALL body. */
10207 gfc_resolve_forall_body (code
, nvar
, var_expr
);
10209 /* May call gfc_resolve_forall to resolve the inner FORALL loop. */
10210 gfc_resolve_blocks (code
->block
, ns
);
10214 /* Free only the VAR_EXPRs allocated in this frame. */
10215 for (i
= nvar
; i
< tmp
; i
++)
10216 gfc_free_expr (var_expr
[i
]);
10220 /* We are in the outermost FORALL construct. */
10221 gcc_assert (forall_save
== 0);
10223 /* VAR_EXPR is not needed any more. */
10230 /* Resolve a BLOCK construct statement. */
10233 resolve_block_construct (gfc_code
* code
)
10235 /* Resolve the BLOCK's namespace. */
10236 gfc_resolve (code
->ext
.block
.ns
);
10238 /* For an ASSOCIATE block, the associations (and their targets) are already
10239 resolved during resolve_symbol. */
10243 /* Resolve lists of blocks found in IF, SELECT CASE, WHERE, FORALL, GOTO and
10247 gfc_resolve_blocks (gfc_code
*b
, gfc_namespace
*ns
)
10251 for (; b
; b
= b
->block
)
10253 t
= gfc_resolve_expr (b
->expr1
);
10254 if (!gfc_resolve_expr (b
->expr2
))
10260 if (t
&& b
->expr1
!= NULL
10261 && (b
->expr1
->ts
.type
!= BT_LOGICAL
|| b
->expr1
->rank
!= 0))
10262 gfc_error ("IF clause at %L requires a scalar LOGICAL expression",
10268 && b
->expr1
!= NULL
10269 && (b
->expr1
->ts
.type
!= BT_LOGICAL
|| b
->expr1
->rank
== 0))
10270 gfc_error ("WHERE/ELSEWHERE clause at %L requires a LOGICAL array",
10275 resolve_branch (b
->label1
, b
);
10279 resolve_block_construct (b
);
10283 case EXEC_SELECT_TYPE
:
10286 case EXEC_DO_WHILE
:
10287 case EXEC_DO_CONCURRENT
:
10288 case EXEC_CRITICAL
:
10291 case EXEC_IOLENGTH
:
10295 case EXEC_OMP_ATOMIC
:
10296 case EXEC_OACC_ATOMIC
:
10298 gfc_omp_atomic_op aop
10299 = (gfc_omp_atomic_op
) (b
->ext
.omp_atomic
& GFC_OMP_ATOMIC_MASK
);
10301 /* Verify this before calling gfc_resolve_code, which might
10303 gcc_assert (b
->next
&& b
->next
->op
== EXEC_ASSIGN
);
10304 gcc_assert (((aop
!= GFC_OMP_ATOMIC_CAPTURE
)
10305 && b
->next
->next
== NULL
)
10306 || ((aop
== GFC_OMP_ATOMIC_CAPTURE
)
10307 && b
->next
->next
!= NULL
10308 && b
->next
->next
->op
== EXEC_ASSIGN
10309 && b
->next
->next
->next
== NULL
));
10313 case EXEC_OACC_PARALLEL_LOOP
:
10314 case EXEC_OACC_PARALLEL
:
10315 case EXEC_OACC_KERNELS_LOOP
:
10316 case EXEC_OACC_KERNELS
:
10317 case EXEC_OACC_DATA
:
10318 case EXEC_OACC_HOST_DATA
:
10319 case EXEC_OACC_LOOP
:
10320 case EXEC_OACC_UPDATE
:
10321 case EXEC_OACC_WAIT
:
10322 case EXEC_OACC_CACHE
:
10323 case EXEC_OACC_ENTER_DATA
:
10324 case EXEC_OACC_EXIT_DATA
:
10325 case EXEC_OACC_ROUTINE
:
10326 case EXEC_OMP_CRITICAL
:
10327 case EXEC_OMP_DISTRIBUTE
:
10328 case EXEC_OMP_DISTRIBUTE_PARALLEL_DO
:
10329 case EXEC_OMP_DISTRIBUTE_PARALLEL_DO_SIMD
:
10330 case EXEC_OMP_DISTRIBUTE_SIMD
:
10332 case EXEC_OMP_DO_SIMD
:
10333 case EXEC_OMP_MASTER
:
10334 case EXEC_OMP_ORDERED
:
10335 case EXEC_OMP_PARALLEL
:
10336 case EXEC_OMP_PARALLEL_DO
:
10337 case EXEC_OMP_PARALLEL_DO_SIMD
:
10338 case EXEC_OMP_PARALLEL_SECTIONS
:
10339 case EXEC_OMP_PARALLEL_WORKSHARE
:
10340 case EXEC_OMP_SECTIONS
:
10341 case EXEC_OMP_SIMD
:
10342 case EXEC_OMP_SINGLE
:
10343 case EXEC_OMP_TARGET
:
10344 case EXEC_OMP_TARGET_DATA
:
10345 case EXEC_OMP_TARGET_ENTER_DATA
:
10346 case EXEC_OMP_TARGET_EXIT_DATA
:
10347 case EXEC_OMP_TARGET_PARALLEL
:
10348 case EXEC_OMP_TARGET_PARALLEL_DO
:
10349 case EXEC_OMP_TARGET_PARALLEL_DO_SIMD
:
10350 case EXEC_OMP_TARGET_SIMD
:
10351 case EXEC_OMP_TARGET_TEAMS
:
10352 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE
:
10353 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO
:
10354 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
10355 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_SIMD
:
10356 case EXEC_OMP_TARGET_UPDATE
:
10357 case EXEC_OMP_TASK
:
10358 case EXEC_OMP_TASKGROUP
:
10359 case EXEC_OMP_TASKLOOP
:
10360 case EXEC_OMP_TASKLOOP_SIMD
:
10361 case EXEC_OMP_TASKWAIT
:
10362 case EXEC_OMP_TASKYIELD
:
10363 case EXEC_OMP_TEAMS
:
10364 case EXEC_OMP_TEAMS_DISTRIBUTE
:
10365 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO
:
10366 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
10367 case EXEC_OMP_TEAMS_DISTRIBUTE_SIMD
:
10368 case EXEC_OMP_WORKSHARE
:
10372 gfc_internal_error ("gfc_resolve_blocks(): Bad block type");
10375 gfc_resolve_code (b
->next
, ns
);
10380 /* Does everything to resolve an ordinary assignment. Returns true
10381 if this is an interface assignment. */
10383 resolve_ordinary_assign (gfc_code
*code
, gfc_namespace
*ns
)
10390 symbol_attribute attr
;
10392 if (gfc_extend_assign (code
, ns
))
10396 if (code
->op
== EXEC_ASSIGN_CALL
)
10398 lhs
= code
->ext
.actual
->expr
;
10399 rhsptr
= &code
->ext
.actual
->next
->expr
;
10403 gfc_actual_arglist
* args
;
10404 gfc_typebound_proc
* tbp
;
10406 gcc_assert (code
->op
== EXEC_COMPCALL
);
10408 args
= code
->expr1
->value
.compcall
.actual
;
10410 rhsptr
= &args
->next
->expr
;
10412 tbp
= code
->expr1
->value
.compcall
.tbp
;
10413 gcc_assert (!tbp
->is_generic
);
10416 /* Make a temporary rhs when there is a default initializer
10417 and rhs is the same symbol as the lhs. */
10418 if ((*rhsptr
)->expr_type
== EXPR_VARIABLE
10419 && (*rhsptr
)->symtree
->n
.sym
->ts
.type
== BT_DERIVED
10420 && gfc_has_default_initializer ((*rhsptr
)->symtree
->n
.sym
->ts
.u
.derived
)
10421 && (lhs
->symtree
->n
.sym
== (*rhsptr
)->symtree
->n
.sym
))
10422 *rhsptr
= gfc_get_parentheses (*rhsptr
);
10431 && !gfc_notify_std (GFC_STD_GNU
, "BOZ literal at %L outside "
10432 "a DATA statement and outside INT/REAL/DBLE/CMPLX",
10436 /* Handle the case of a BOZ literal on the RHS. */
10437 if (rhs
->is_boz
&& lhs
->ts
.type
!= BT_INTEGER
)
10440 if (warn_surprising
)
10441 gfc_warning (OPT_Wsurprising
,
10442 "BOZ literal at %L is bitwise transferred "
10443 "non-integer symbol %qs", &code
->loc
,
10444 lhs
->symtree
->n
.sym
->name
);
10446 if (!gfc_convert_boz (rhs
, &lhs
->ts
))
10448 if ((rc
= gfc_range_check (rhs
)) != ARITH_OK
)
10450 if (rc
== ARITH_UNDERFLOW
)
10451 gfc_error ("Arithmetic underflow of bit-wise transferred BOZ at %L"
10452 ". This check can be disabled with the option "
10453 "%<-fno-range-check%>", &rhs
->where
);
10454 else if (rc
== ARITH_OVERFLOW
)
10455 gfc_error ("Arithmetic overflow of bit-wise transferred BOZ at %L"
10456 ". This check can be disabled with the option "
10457 "%<-fno-range-check%>", &rhs
->where
);
10458 else if (rc
== ARITH_NAN
)
10459 gfc_error ("Arithmetic NaN of bit-wise transferred BOZ at %L"
10460 ". This check can be disabled with the option "
10461 "%<-fno-range-check%>", &rhs
->where
);
10466 if (lhs
->ts
.type
== BT_CHARACTER
10467 && warn_character_truncation
)
10469 HOST_WIDE_INT llen
= 0, rlen
= 0;
10470 if (lhs
->ts
.u
.cl
!= NULL
10471 && lhs
->ts
.u
.cl
->length
!= NULL
10472 && lhs
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
)
10473 llen
= gfc_mpz_get_hwi (lhs
->ts
.u
.cl
->length
->value
.integer
);
10475 if (rhs
->expr_type
== EXPR_CONSTANT
)
10476 rlen
= rhs
->value
.character
.length
;
10478 else if (rhs
->ts
.u
.cl
!= NULL
10479 && rhs
->ts
.u
.cl
->length
!= NULL
10480 && rhs
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
)
10481 rlen
= gfc_mpz_get_hwi (rhs
->ts
.u
.cl
->length
->value
.integer
);
10483 if (rlen
&& llen
&& rlen
> llen
)
10484 gfc_warning_now (OPT_Wcharacter_truncation
,
10485 "CHARACTER expression will be truncated "
10486 "in assignment (%ld/%ld) at %L",
10487 (long) llen
, (long) rlen
, &code
->loc
);
10490 /* Ensure that a vector index expression for the lvalue is evaluated
10491 to a temporary if the lvalue symbol is referenced in it. */
10494 for (ref
= lhs
->ref
; ref
; ref
= ref
->next
)
10495 if (ref
->type
== REF_ARRAY
)
10497 for (n
= 0; n
< ref
->u
.ar
.dimen
; n
++)
10498 if (ref
->u
.ar
.dimen_type
[n
] == DIMEN_VECTOR
10499 && gfc_find_sym_in_expr (lhs
->symtree
->n
.sym
,
10500 ref
->u
.ar
.start
[n
]))
10502 = gfc_get_parentheses (ref
->u
.ar
.start
[n
]);
10506 if (gfc_pure (NULL
))
10508 if (lhs
->ts
.type
== BT_DERIVED
10509 && lhs
->expr_type
== EXPR_VARIABLE
10510 && lhs
->ts
.u
.derived
->attr
.pointer_comp
10511 && rhs
->expr_type
== EXPR_VARIABLE
10512 && (gfc_impure_variable (rhs
->symtree
->n
.sym
)
10513 || gfc_is_coindexed (rhs
)))
10515 /* F2008, C1283. */
10516 if (gfc_is_coindexed (rhs
))
10517 gfc_error ("Coindexed expression at %L is assigned to "
10518 "a derived type variable with a POINTER "
10519 "component in a PURE procedure",
10522 gfc_error ("The impure variable at %L is assigned to "
10523 "a derived type variable with a POINTER "
10524 "component in a PURE procedure (12.6)",
10529 /* Fortran 2008, C1283. */
10530 if (gfc_is_coindexed (lhs
))
10532 gfc_error ("Assignment to coindexed variable at %L in a PURE "
10533 "procedure", &rhs
->where
);
10538 if (gfc_implicit_pure (NULL
))
10540 if (lhs
->expr_type
== EXPR_VARIABLE
10541 && lhs
->symtree
->n
.sym
!= gfc_current_ns
->proc_name
10542 && lhs
->symtree
->n
.sym
->ns
!= gfc_current_ns
)
10543 gfc_unset_implicit_pure (NULL
);
10545 if (lhs
->ts
.type
== BT_DERIVED
10546 && lhs
->expr_type
== EXPR_VARIABLE
10547 && lhs
->ts
.u
.derived
->attr
.pointer_comp
10548 && rhs
->expr_type
== EXPR_VARIABLE
10549 && (gfc_impure_variable (rhs
->symtree
->n
.sym
)
10550 || gfc_is_coindexed (rhs
)))
10551 gfc_unset_implicit_pure (NULL
);
10553 /* Fortran 2008, C1283. */
10554 if (gfc_is_coindexed (lhs
))
10555 gfc_unset_implicit_pure (NULL
);
10558 /* F2008, 7.2.1.2. */
10559 attr
= gfc_expr_attr (lhs
);
10560 if (lhs
->ts
.type
== BT_CLASS
&& attr
.allocatable
)
10562 if (attr
.codimension
)
10564 gfc_error ("Assignment to polymorphic coarray at %L is not "
10565 "permitted", &lhs
->where
);
10568 if (!gfc_notify_std (GFC_STD_F2008
, "Assignment to an allocatable "
10569 "polymorphic variable at %L", &lhs
->where
))
10571 if (!flag_realloc_lhs
)
10573 gfc_error ("Assignment to an allocatable polymorphic variable at %L "
10574 "requires %<-frealloc-lhs%>", &lhs
->where
);
10578 else if (lhs
->ts
.type
== BT_CLASS
)
10580 gfc_error ("Nonallocatable variable must not be polymorphic in intrinsic "
10581 "assignment at %L - check that there is a matching specific "
10582 "subroutine for '=' operator", &lhs
->where
);
10586 bool lhs_coindexed
= gfc_is_coindexed (lhs
);
10588 /* F2008, Section 7.2.1.2. */
10589 if (lhs_coindexed
&& gfc_has_ultimate_allocatable (lhs
))
10591 gfc_error ("Coindexed variable must not have an allocatable ultimate "
10592 "component in assignment at %L", &lhs
->where
);
10596 /* Assign the 'data' of a class object to a derived type. */
10597 if (lhs
->ts
.type
== BT_DERIVED
10598 && rhs
->ts
.type
== BT_CLASS
10599 && rhs
->expr_type
!= EXPR_ARRAY
)
10600 gfc_add_data_component (rhs
);
10602 /* Make sure there is a vtable and, in particular, a _copy for the
10604 if (UNLIMITED_POLY (lhs
) && lhs
->rank
&& rhs
->ts
.type
!= BT_CLASS
)
10605 gfc_find_vtab (&rhs
->ts
);
10607 bool caf_convert_to_send
= flag_coarray
== GFC_FCOARRAY_LIB
10609 || (code
->expr2
->expr_type
== EXPR_FUNCTION
10610 && code
->expr2
->value
.function
.isym
10611 && code
->expr2
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
10612 && (code
->expr1
->rank
== 0 || code
->expr2
->rank
!= 0)
10613 && !gfc_expr_attr (rhs
).allocatable
10614 && !gfc_has_vector_subscript (rhs
)));
10616 gfc_check_assign (lhs
, rhs
, 1, !caf_convert_to_send
);
10618 /* Insert a GFC_ISYM_CAF_SEND intrinsic, when the LHS is a coindexed variable.
10619 Additionally, insert this code when the RHS is a CAF as we then use the
10620 GFC_ISYM_CAF_SEND intrinsic just to avoid a temporary; but do not do so if
10621 the LHS is (re)allocatable or has a vector subscript. If the LHS is a
10622 noncoindexed array and the RHS is a coindexed scalar, use the normal code
10624 if (caf_convert_to_send
)
10626 if (code
->expr2
->expr_type
== EXPR_FUNCTION
10627 && code
->expr2
->value
.function
.isym
10628 && code
->expr2
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
)
10629 remove_caf_get_intrinsic (code
->expr2
);
10630 code
->op
= EXEC_CALL
;
10631 gfc_get_sym_tree (GFC_PREFIX ("caf_send"), ns
, &code
->symtree
, true);
10632 code
->resolved_sym
= code
->symtree
->n
.sym
;
10633 code
->resolved_sym
->attr
.flavor
= FL_PROCEDURE
;
10634 code
->resolved_sym
->attr
.intrinsic
= 1;
10635 code
->resolved_sym
->attr
.subroutine
= 1;
10636 code
->resolved_isym
= gfc_intrinsic_subroutine_by_id (GFC_ISYM_CAF_SEND
);
10637 gfc_commit_symbol (code
->resolved_sym
);
10638 code
->ext
.actual
= gfc_get_actual_arglist ();
10639 code
->ext
.actual
->expr
= lhs
;
10640 code
->ext
.actual
->next
= gfc_get_actual_arglist ();
10641 code
->ext
.actual
->next
->expr
= rhs
;
10642 code
->expr1
= NULL
;
10643 code
->expr2
= NULL
;
10650 /* Add a component reference onto an expression. */
10653 add_comp_ref (gfc_expr
*e
, gfc_component
*c
)
10658 ref
= &((*ref
)->next
);
10659 *ref
= gfc_get_ref ();
10660 (*ref
)->type
= REF_COMPONENT
;
10661 (*ref
)->u
.c
.sym
= e
->ts
.u
.derived
;
10662 (*ref
)->u
.c
.component
= c
;
10665 /* Add a full array ref, as necessary. */
10668 gfc_add_full_array_ref (e
, c
->as
);
10669 e
->rank
= c
->as
->rank
;
10674 /* Build an assignment. Keep the argument 'op' for future use, so that
10675 pointer assignments can be made. */
10678 build_assignment (gfc_exec_op op
, gfc_expr
*expr1
, gfc_expr
*expr2
,
10679 gfc_component
*comp1
, gfc_component
*comp2
, locus loc
)
10681 gfc_code
*this_code
;
10683 this_code
= gfc_get_code (op
);
10684 this_code
->next
= NULL
;
10685 this_code
->expr1
= gfc_copy_expr (expr1
);
10686 this_code
->expr2
= gfc_copy_expr (expr2
);
10687 this_code
->loc
= loc
;
10688 if (comp1
&& comp2
)
10690 add_comp_ref (this_code
->expr1
, comp1
);
10691 add_comp_ref (this_code
->expr2
, comp2
);
10698 /* Makes a temporary variable expression based on the characteristics of
10699 a given variable expression. */
10702 get_temp_from_expr (gfc_expr
*e
, gfc_namespace
*ns
)
10704 static int serial
= 0;
10705 char name
[GFC_MAX_SYMBOL_LEN
];
10707 gfc_array_spec
*as
;
10708 gfc_array_ref
*aref
;
10711 sprintf (name
, GFC_PREFIX("DA%d"), serial
++);
10712 gfc_get_sym_tree (name
, ns
, &tmp
, false);
10713 gfc_add_type (tmp
->n
.sym
, &e
->ts
, NULL
);
10715 if (e
->expr_type
== EXPR_CONSTANT
&& e
->ts
.type
== BT_CHARACTER
)
10716 tmp
->n
.sym
->ts
.u
.cl
->length
= gfc_get_int_expr (gfc_charlen_int_kind
,
10718 e
->value
.character
.length
);
10724 /* Obtain the arrayspec for the temporary. */
10725 if (e
->rank
&& e
->expr_type
!= EXPR_ARRAY
10726 && e
->expr_type
!= EXPR_FUNCTION
10727 && e
->expr_type
!= EXPR_OP
)
10729 aref
= gfc_find_array_ref (e
);
10730 if (e
->expr_type
== EXPR_VARIABLE
10731 && e
->symtree
->n
.sym
->as
== aref
->as
)
10735 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
10736 if (ref
->type
== REF_COMPONENT
10737 && ref
->u
.c
.component
->as
== aref
->as
)
10745 /* Add the attributes and the arrayspec to the temporary. */
10746 tmp
->n
.sym
->attr
= gfc_expr_attr (e
);
10747 tmp
->n
.sym
->attr
.function
= 0;
10748 tmp
->n
.sym
->attr
.result
= 0;
10749 tmp
->n
.sym
->attr
.flavor
= FL_VARIABLE
;
10750 tmp
->n
.sym
->attr
.dummy
= 0;
10751 tmp
->n
.sym
->attr
.intent
= INTENT_UNKNOWN
;
10755 tmp
->n
.sym
->as
= gfc_copy_array_spec (as
);
10758 if (as
->type
== AS_DEFERRED
)
10759 tmp
->n
.sym
->attr
.allocatable
= 1;
10761 else if (e
->rank
&& (e
->expr_type
== EXPR_ARRAY
10762 || e
->expr_type
== EXPR_FUNCTION
10763 || e
->expr_type
== EXPR_OP
))
10765 tmp
->n
.sym
->as
= gfc_get_array_spec ();
10766 tmp
->n
.sym
->as
->type
= AS_DEFERRED
;
10767 tmp
->n
.sym
->as
->rank
= e
->rank
;
10768 tmp
->n
.sym
->attr
.allocatable
= 1;
10769 tmp
->n
.sym
->attr
.dimension
= 1;
10772 tmp
->n
.sym
->attr
.dimension
= 0;
10774 gfc_set_sym_referenced (tmp
->n
.sym
);
10775 gfc_commit_symbol (tmp
->n
.sym
);
10776 e
= gfc_lval_expr_from_sym (tmp
->n
.sym
);
10778 /* Should the lhs be a section, use its array ref for the
10779 temporary expression. */
10780 if (aref
&& aref
->type
!= AR_FULL
)
10782 gfc_free_ref_list (e
->ref
);
10783 e
->ref
= gfc_copy_ref (ref
);
10789 /* Add one line of code to the code chain, making sure that 'head' and
10790 'tail' are appropriately updated. */
10793 add_code_to_chain (gfc_code
**this_code
, gfc_code
**head
, gfc_code
**tail
)
10795 gcc_assert (this_code
);
10797 *head
= *tail
= *this_code
;
10799 *tail
= gfc_append_code (*tail
, *this_code
);
10804 /* Counts the potential number of part array references that would
10805 result from resolution of typebound defined assignments. */
10808 nonscalar_typebound_assign (gfc_symbol
*derived
, int depth
)
10811 int c_depth
= 0, t_depth
;
10813 for (c
= derived
->components
; c
; c
= c
->next
)
10815 if ((!gfc_bt_struct (c
->ts
.type
)
10817 || c
->attr
.allocatable
10818 || c
->attr
.proc_pointer_comp
10819 || c
->attr
.class_pointer
10820 || c
->attr
.proc_pointer
)
10821 && !c
->attr
.defined_assign_comp
)
10824 if (c
->as
&& c_depth
== 0)
10827 if (c
->ts
.u
.derived
->attr
.defined_assign_comp
)
10828 t_depth
= nonscalar_typebound_assign (c
->ts
.u
.derived
,
10833 c_depth
= t_depth
> c_depth
? t_depth
: c_depth
;
10835 return depth
+ c_depth
;
10839 /* Implement 7.2.1.3 of the F08 standard:
10840 "An intrinsic assignment where the variable is of derived type is
10841 performed as if each component of the variable were assigned from the
10842 corresponding component of expr using pointer assignment (7.2.2) for
10843 each pointer component, defined assignment for each nonpointer
10844 nonallocatable component of a type that has a type-bound defined
10845 assignment consistent with the component, intrinsic assignment for
10846 each other nonpointer nonallocatable component, ..."
10848 The pointer assignments are taken care of by the intrinsic
10849 assignment of the structure itself. This function recursively adds
10850 defined assignments where required. The recursion is accomplished
10851 by calling gfc_resolve_code.
10853 When the lhs in a defined assignment has intent INOUT, we need a
10854 temporary for the lhs. In pseudo-code:
10856 ! Only call function lhs once.
10857 if (lhs is not a constant or an variable)
10860 ! Do the intrinsic assignment
10862 ! Now do the defined assignments
10863 do over components with typebound defined assignment [%cmp]
10864 #if one component's assignment procedure is INOUT
10866 #if expr2 non-variable
10872 t1%cmp {defined=} expr2%cmp
10878 expr1%cmp {defined=} expr2%cmp
10882 /* The temporary assignments have to be put on top of the additional
10883 code to avoid the result being changed by the intrinsic assignment.
10885 static int component_assignment_level
= 0;
10886 static gfc_code
*tmp_head
= NULL
, *tmp_tail
= NULL
;
10889 generate_component_assignments (gfc_code
**code
, gfc_namespace
*ns
)
10891 gfc_component
*comp1
, *comp2
;
10892 gfc_code
*this_code
= NULL
, *head
= NULL
, *tail
= NULL
;
10894 int error_count
, depth
;
10896 gfc_get_errors (NULL
, &error_count
);
10898 /* Filter out continuing processing after an error. */
10900 || (*code
)->expr1
->ts
.type
!= BT_DERIVED
10901 || (*code
)->expr2
->ts
.type
!= BT_DERIVED
)
10904 /* TODO: Handle more than one part array reference in assignments. */
10905 depth
= nonscalar_typebound_assign ((*code
)->expr1
->ts
.u
.derived
,
10906 (*code
)->expr1
->rank
? 1 : 0);
10909 gfc_warning (0, "TODO: type-bound defined assignment(s) at %L not "
10910 "done because multiple part array references would "
10911 "occur in intermediate expressions.", &(*code
)->loc
);
10915 component_assignment_level
++;
10917 /* Create a temporary so that functions get called only once. */
10918 if ((*code
)->expr2
->expr_type
!= EXPR_VARIABLE
10919 && (*code
)->expr2
->expr_type
!= EXPR_CONSTANT
)
10921 gfc_expr
*tmp_expr
;
10923 /* Assign the rhs to the temporary. */
10924 tmp_expr
= get_temp_from_expr ((*code
)->expr1
, ns
);
10925 this_code
= build_assignment (EXEC_ASSIGN
,
10926 tmp_expr
, (*code
)->expr2
,
10927 NULL
, NULL
, (*code
)->loc
);
10928 /* Add the code and substitute the rhs expression. */
10929 add_code_to_chain (&this_code
, &tmp_head
, &tmp_tail
);
10930 gfc_free_expr ((*code
)->expr2
);
10931 (*code
)->expr2
= tmp_expr
;
10934 /* Do the intrinsic assignment. This is not needed if the lhs is one
10935 of the temporaries generated here, since the intrinsic assignment
10936 to the final result already does this. */
10937 if ((*code
)->expr1
->symtree
->n
.sym
->name
[2] != '@')
10939 this_code
= build_assignment (EXEC_ASSIGN
,
10940 (*code
)->expr1
, (*code
)->expr2
,
10941 NULL
, NULL
, (*code
)->loc
);
10942 add_code_to_chain (&this_code
, &head
, &tail
);
10945 comp1
= (*code
)->expr1
->ts
.u
.derived
->components
;
10946 comp2
= (*code
)->expr2
->ts
.u
.derived
->components
;
10949 for (; comp1
; comp1
= comp1
->next
, comp2
= comp2
->next
)
10951 bool inout
= false;
10953 /* The intrinsic assignment does the right thing for pointers
10954 of all kinds and allocatable components. */
10955 if (!gfc_bt_struct (comp1
->ts
.type
)
10956 || comp1
->attr
.pointer
10957 || comp1
->attr
.allocatable
10958 || comp1
->attr
.proc_pointer_comp
10959 || comp1
->attr
.class_pointer
10960 || comp1
->attr
.proc_pointer
)
10963 /* Make an assigment for this component. */
10964 this_code
= build_assignment (EXEC_ASSIGN
,
10965 (*code
)->expr1
, (*code
)->expr2
,
10966 comp1
, comp2
, (*code
)->loc
);
10968 /* Convert the assignment if there is a defined assignment for
10969 this type. Otherwise, using the call from gfc_resolve_code,
10970 recurse into its components. */
10971 gfc_resolve_code (this_code
, ns
);
10973 if (this_code
->op
== EXEC_ASSIGN_CALL
)
10975 gfc_formal_arglist
*dummy_args
;
10977 /* Check that there is a typebound defined assignment. If not,
10978 then this must be a module defined assignment. We cannot
10979 use the defined_assign_comp attribute here because it must
10980 be this derived type that has the defined assignment and not
10982 if (!(comp1
->ts
.u
.derived
->f2k_derived
10983 && comp1
->ts
.u
.derived
->f2k_derived
10984 ->tb_op
[INTRINSIC_ASSIGN
]))
10986 gfc_free_statements (this_code
);
10991 /* If the first argument of the subroutine has intent INOUT
10992 a temporary must be generated and used instead. */
10993 rsym
= this_code
->resolved_sym
;
10994 dummy_args
= gfc_sym_get_dummy_args (rsym
);
10996 && dummy_args
->sym
->attr
.intent
== INTENT_INOUT
)
10998 gfc_code
*temp_code
;
11001 /* Build the temporary required for the assignment and put
11002 it at the head of the generated code. */
11005 t1
= get_temp_from_expr ((*code
)->expr1
, ns
);
11006 temp_code
= build_assignment (EXEC_ASSIGN
,
11007 t1
, (*code
)->expr1
,
11008 NULL
, NULL
, (*code
)->loc
);
11010 /* For allocatable LHS, check whether it is allocated. Note
11011 that allocatable components with defined assignment are
11012 not yet support. See PR 57696. */
11013 if ((*code
)->expr1
->symtree
->n
.sym
->attr
.allocatable
)
11017 gfc_lval_expr_from_sym ((*code
)->expr1
->symtree
->n
.sym
);
11018 block
= gfc_get_code (EXEC_IF
);
11019 block
->block
= gfc_get_code (EXEC_IF
);
11020 block
->block
->expr1
11021 = gfc_build_intrinsic_call (ns
,
11022 GFC_ISYM_ALLOCATED
, "allocated",
11023 (*code
)->loc
, 1, e
);
11024 block
->block
->next
= temp_code
;
11027 add_code_to_chain (&temp_code
, &tmp_head
, &tmp_tail
);
11030 /* Replace the first actual arg with the component of the
11032 gfc_free_expr (this_code
->ext
.actual
->expr
);
11033 this_code
->ext
.actual
->expr
= gfc_copy_expr (t1
);
11034 add_comp_ref (this_code
->ext
.actual
->expr
, comp1
);
11036 /* If the LHS variable is allocatable and wasn't allocated and
11037 the temporary is allocatable, pointer assign the address of
11038 the freshly allocated LHS to the temporary. */
11039 if ((*code
)->expr1
->symtree
->n
.sym
->attr
.allocatable
11040 && gfc_expr_attr ((*code
)->expr1
).allocatable
)
11045 cond
= gfc_get_expr ();
11046 cond
->ts
.type
= BT_LOGICAL
;
11047 cond
->ts
.kind
= gfc_default_logical_kind
;
11048 cond
->expr_type
= EXPR_OP
;
11049 cond
->where
= (*code
)->loc
;
11050 cond
->value
.op
.op
= INTRINSIC_NOT
;
11051 cond
->value
.op
.op1
= gfc_build_intrinsic_call (ns
,
11052 GFC_ISYM_ALLOCATED
, "allocated",
11053 (*code
)->loc
, 1, gfc_copy_expr (t1
));
11054 block
= gfc_get_code (EXEC_IF
);
11055 block
->block
= gfc_get_code (EXEC_IF
);
11056 block
->block
->expr1
= cond
;
11057 block
->block
->next
= build_assignment (EXEC_POINTER_ASSIGN
,
11058 t1
, (*code
)->expr1
,
11059 NULL
, NULL
, (*code
)->loc
);
11060 add_code_to_chain (&block
, &head
, &tail
);
11064 else if (this_code
->op
== EXEC_ASSIGN
&& !this_code
->next
)
11066 /* Don't add intrinsic assignments since they are already
11067 effected by the intrinsic assignment of the structure. */
11068 gfc_free_statements (this_code
);
11073 add_code_to_chain (&this_code
, &head
, &tail
);
11077 /* Transfer the value to the final result. */
11078 this_code
= build_assignment (EXEC_ASSIGN
,
11079 (*code
)->expr1
, t1
,
11080 comp1
, comp2
, (*code
)->loc
);
11081 add_code_to_chain (&this_code
, &head
, &tail
);
11085 /* Put the temporary assignments at the top of the generated code. */
11086 if (tmp_head
&& component_assignment_level
== 1)
11088 gfc_append_code (tmp_head
, head
);
11090 tmp_head
= tmp_tail
= NULL
;
11093 // If we did a pointer assignment - thus, we need to ensure that the LHS is
11094 // not accidentally deallocated. Hence, nullify t1.
11095 if (t1
&& (*code
)->expr1
->symtree
->n
.sym
->attr
.allocatable
11096 && gfc_expr_attr ((*code
)->expr1
).allocatable
)
11102 e
= gfc_lval_expr_from_sym ((*code
)->expr1
->symtree
->n
.sym
);
11103 cond
= gfc_build_intrinsic_call (ns
, GFC_ISYM_ASSOCIATED
, "associated",
11104 (*code
)->loc
, 2, gfc_copy_expr (t1
), e
);
11105 block
= gfc_get_code (EXEC_IF
);
11106 block
->block
= gfc_get_code (EXEC_IF
);
11107 block
->block
->expr1
= cond
;
11108 block
->block
->next
= build_assignment (EXEC_POINTER_ASSIGN
,
11109 t1
, gfc_get_null_expr (&(*code
)->loc
),
11110 NULL
, NULL
, (*code
)->loc
);
11111 gfc_append_code (tail
, block
);
11115 /* Now attach the remaining code chain to the input code. Step on
11116 to the end of the new code since resolution is complete. */
11117 gcc_assert ((*code
)->op
== EXEC_ASSIGN
);
11118 tail
->next
= (*code
)->next
;
11119 /* Overwrite 'code' because this would place the intrinsic assignment
11120 before the temporary for the lhs is created. */
11121 gfc_free_expr ((*code
)->expr1
);
11122 gfc_free_expr ((*code
)->expr2
);
11128 component_assignment_level
--;
11132 /* F2008: Pointer function assignments are of the form:
11133 ptr_fcn (args) = expr
11134 This function breaks these assignments into two statements:
11135 temporary_pointer => ptr_fcn(args)
11136 temporary_pointer = expr */
11139 resolve_ptr_fcn_assign (gfc_code
**code
, gfc_namespace
*ns
)
11141 gfc_expr
*tmp_ptr_expr
;
11142 gfc_code
*this_code
;
11143 gfc_component
*comp
;
11146 if ((*code
)->expr1
->expr_type
!= EXPR_FUNCTION
)
11149 /* Even if standard does not support this feature, continue to build
11150 the two statements to avoid upsetting frontend_passes.c. */
11151 gfc_notify_std (GFC_STD_F2008
, "Pointer procedure assignment at "
11152 "%L", &(*code
)->loc
);
11154 comp
= gfc_get_proc_ptr_comp ((*code
)->expr1
);
11157 s
= comp
->ts
.interface
;
11159 s
= (*code
)->expr1
->symtree
->n
.sym
;
11161 if (s
== NULL
|| !s
->result
->attr
.pointer
)
11163 gfc_error ("The function result on the lhs of the assignment at "
11164 "%L must have the pointer attribute.",
11165 &(*code
)->expr1
->where
);
11166 (*code
)->op
= EXEC_NOP
;
11170 tmp_ptr_expr
= get_temp_from_expr ((*code
)->expr2
, ns
);
11172 /* get_temp_from_expression is set up for ordinary assignments. To that
11173 end, where array bounds are not known, arrays are made allocatable.
11174 Change the temporary to a pointer here. */
11175 tmp_ptr_expr
->symtree
->n
.sym
->attr
.pointer
= 1;
11176 tmp_ptr_expr
->symtree
->n
.sym
->attr
.allocatable
= 0;
11177 tmp_ptr_expr
->where
= (*code
)->loc
;
11179 this_code
= build_assignment (EXEC_ASSIGN
,
11180 tmp_ptr_expr
, (*code
)->expr2
,
11181 NULL
, NULL
, (*code
)->loc
);
11182 this_code
->next
= (*code
)->next
;
11183 (*code
)->next
= this_code
;
11184 (*code
)->op
= EXEC_POINTER_ASSIGN
;
11185 (*code
)->expr2
= (*code
)->expr1
;
11186 (*code
)->expr1
= tmp_ptr_expr
;
11192 /* Deferred character length assignments from an operator expression
11193 require a temporary because the character length of the lhs can
11194 change in the course of the assignment. */
11197 deferred_op_assign (gfc_code
**code
, gfc_namespace
*ns
)
11199 gfc_expr
*tmp_expr
;
11200 gfc_code
*this_code
;
11202 if (!((*code
)->expr1
->ts
.type
== BT_CHARACTER
11203 && (*code
)->expr1
->ts
.deferred
&& (*code
)->expr1
->rank
11204 && (*code
)->expr2
->expr_type
== EXPR_OP
))
11207 if (!gfc_check_dependency ((*code
)->expr1
, (*code
)->expr2
, 1))
11210 if (gfc_expr_attr ((*code
)->expr1
).pointer
)
11213 tmp_expr
= get_temp_from_expr ((*code
)->expr1
, ns
);
11214 tmp_expr
->where
= (*code
)->loc
;
11216 /* A new charlen is required to ensure that the variable string
11217 length is different to that of the original lhs. */
11218 tmp_expr
->ts
.u
.cl
= gfc_get_charlen();
11219 tmp_expr
->symtree
->n
.sym
->ts
.u
.cl
= tmp_expr
->ts
.u
.cl
;
11220 tmp_expr
->ts
.u
.cl
->next
= (*code
)->expr2
->ts
.u
.cl
->next
;
11221 (*code
)->expr2
->ts
.u
.cl
->next
= tmp_expr
->ts
.u
.cl
;
11223 tmp_expr
->symtree
->n
.sym
->ts
.deferred
= 1;
11225 this_code
= build_assignment (EXEC_ASSIGN
,
11227 gfc_copy_expr (tmp_expr
),
11228 NULL
, NULL
, (*code
)->loc
);
11230 (*code
)->expr1
= tmp_expr
;
11232 this_code
->next
= (*code
)->next
;
11233 (*code
)->next
= this_code
;
11239 /* Given a block of code, recursively resolve everything pointed to by this
11243 gfc_resolve_code (gfc_code
*code
, gfc_namespace
*ns
)
11245 int omp_workshare_save
;
11246 int forall_save
, do_concurrent_save
;
11250 frame
.prev
= cs_base
;
11254 find_reachable_labels (code
);
11256 for (; code
; code
= code
->next
)
11258 frame
.current
= code
;
11259 forall_save
= forall_flag
;
11260 do_concurrent_save
= gfc_do_concurrent_flag
;
11262 if (code
->op
== EXEC_FORALL
)
11265 gfc_resolve_forall (code
, ns
, forall_save
);
11268 else if (code
->block
)
11270 omp_workshare_save
= -1;
11273 case EXEC_OACC_PARALLEL_LOOP
:
11274 case EXEC_OACC_PARALLEL
:
11275 case EXEC_OACC_KERNELS_LOOP
:
11276 case EXEC_OACC_KERNELS
:
11277 case EXEC_OACC_DATA
:
11278 case EXEC_OACC_HOST_DATA
:
11279 case EXEC_OACC_LOOP
:
11280 gfc_resolve_oacc_blocks (code
, ns
);
11282 case EXEC_OMP_PARALLEL_WORKSHARE
:
11283 omp_workshare_save
= omp_workshare_flag
;
11284 omp_workshare_flag
= 1;
11285 gfc_resolve_omp_parallel_blocks (code
, ns
);
11287 case EXEC_OMP_PARALLEL
:
11288 case EXEC_OMP_PARALLEL_DO
:
11289 case EXEC_OMP_PARALLEL_DO_SIMD
:
11290 case EXEC_OMP_PARALLEL_SECTIONS
:
11291 case EXEC_OMP_TARGET_PARALLEL
:
11292 case EXEC_OMP_TARGET_PARALLEL_DO
:
11293 case EXEC_OMP_TARGET_PARALLEL_DO_SIMD
:
11294 case EXEC_OMP_TARGET_TEAMS
:
11295 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE
:
11296 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO
:
11297 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
11298 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_SIMD
:
11299 case EXEC_OMP_TASK
:
11300 case EXEC_OMP_TASKLOOP
:
11301 case EXEC_OMP_TASKLOOP_SIMD
:
11302 case EXEC_OMP_TEAMS
:
11303 case EXEC_OMP_TEAMS_DISTRIBUTE
:
11304 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO
:
11305 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
11306 case EXEC_OMP_TEAMS_DISTRIBUTE_SIMD
:
11307 omp_workshare_save
= omp_workshare_flag
;
11308 omp_workshare_flag
= 0;
11309 gfc_resolve_omp_parallel_blocks (code
, ns
);
11311 case EXEC_OMP_DISTRIBUTE
:
11312 case EXEC_OMP_DISTRIBUTE_SIMD
:
11314 case EXEC_OMP_DO_SIMD
:
11315 case EXEC_OMP_SIMD
:
11316 case EXEC_OMP_TARGET_SIMD
:
11317 gfc_resolve_omp_do_blocks (code
, ns
);
11319 case EXEC_SELECT_TYPE
:
11320 /* Blocks are handled in resolve_select_type because we have
11321 to transform the SELECT TYPE into ASSOCIATE first. */
11323 case EXEC_DO_CONCURRENT
:
11324 gfc_do_concurrent_flag
= 1;
11325 gfc_resolve_blocks (code
->block
, ns
);
11326 gfc_do_concurrent_flag
= 2;
11328 case EXEC_OMP_WORKSHARE
:
11329 omp_workshare_save
= omp_workshare_flag
;
11330 omp_workshare_flag
= 1;
11333 gfc_resolve_blocks (code
->block
, ns
);
11337 if (omp_workshare_save
!= -1)
11338 omp_workshare_flag
= omp_workshare_save
;
11342 if (code
->op
!= EXEC_COMPCALL
&& code
->op
!= EXEC_CALL_PPC
)
11343 t
= gfc_resolve_expr (code
->expr1
);
11344 forall_flag
= forall_save
;
11345 gfc_do_concurrent_flag
= do_concurrent_save
;
11347 if (!gfc_resolve_expr (code
->expr2
))
11350 if (code
->op
== EXEC_ALLOCATE
11351 && !gfc_resolve_expr (code
->expr3
))
11357 case EXEC_END_BLOCK
:
11358 case EXEC_END_NESTED_BLOCK
:
11362 case EXEC_ERROR_STOP
:
11364 case EXEC_CONTINUE
:
11366 case EXEC_ASSIGN_CALL
:
11369 case EXEC_CRITICAL
:
11370 resolve_critical (code
);
11373 case EXEC_SYNC_ALL
:
11374 case EXEC_SYNC_IMAGES
:
11375 case EXEC_SYNC_MEMORY
:
11376 resolve_sync (code
);
11381 case EXEC_EVENT_POST
:
11382 case EXEC_EVENT_WAIT
:
11383 resolve_lock_unlock_event (code
);
11386 case EXEC_FAIL_IMAGE
:
11387 case EXEC_FORM_TEAM
:
11388 case EXEC_CHANGE_TEAM
:
11389 case EXEC_END_TEAM
:
11390 case EXEC_SYNC_TEAM
:
11394 /* Keep track of which entry we are up to. */
11395 current_entry_id
= code
->ext
.entry
->id
;
11399 resolve_where (code
, NULL
);
11403 if (code
->expr1
!= NULL
)
11405 if (code
->expr1
->ts
.type
!= BT_INTEGER
)
11406 gfc_error ("ASSIGNED GOTO statement at %L requires an "
11407 "INTEGER variable", &code
->expr1
->where
);
11408 else if (code
->expr1
->symtree
->n
.sym
->attr
.assign
!= 1)
11409 gfc_error ("Variable %qs has not been assigned a target "
11410 "label at %L", code
->expr1
->symtree
->n
.sym
->name
,
11411 &code
->expr1
->where
);
11414 resolve_branch (code
->label1
, code
);
11418 if (code
->expr1
!= NULL
11419 && (code
->expr1
->ts
.type
!= BT_INTEGER
|| code
->expr1
->rank
))
11420 gfc_error ("Alternate RETURN statement at %L requires a SCALAR-"
11421 "INTEGER return specifier", &code
->expr1
->where
);
11424 case EXEC_INIT_ASSIGN
:
11425 case EXEC_END_PROCEDURE
:
11432 /* Remove a GFC_ISYM_CAF_GET inserted for a coindexed variable on
11434 if (code
->expr1
->expr_type
== EXPR_FUNCTION
11435 && code
->expr1
->value
.function
.isym
11436 && code
->expr1
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
)
11437 remove_caf_get_intrinsic (code
->expr1
);
11439 /* If this is a pointer function in an lvalue variable context,
11440 the new code will have to be resolved afresh. This is also the
11441 case with an error, where the code is transformed into NOP to
11442 prevent ICEs downstream. */
11443 if (resolve_ptr_fcn_assign (&code
, ns
)
11444 || code
->op
== EXEC_NOP
)
11447 if (!gfc_check_vardef_context (code
->expr1
, false, false, false,
11451 if (resolve_ordinary_assign (code
, ns
))
11453 if (code
->op
== EXEC_COMPCALL
)
11459 /* Check for dependencies in deferred character length array
11460 assignments and generate a temporary, if necessary. */
11461 if (code
->op
== EXEC_ASSIGN
&& deferred_op_assign (&code
, ns
))
11464 /* F03 7.4.1.3 for non-allocatable, non-pointer components. */
11465 if (code
->op
!= EXEC_CALL
&& code
->expr1
->ts
.type
== BT_DERIVED
11466 && code
->expr1
->ts
.u
.derived
11467 && code
->expr1
->ts
.u
.derived
->attr
.defined_assign_comp
)
11468 generate_component_assignments (&code
, ns
);
11472 case EXEC_LABEL_ASSIGN
:
11473 if (code
->label1
->defined
== ST_LABEL_UNKNOWN
)
11474 gfc_error ("Label %d referenced at %L is never defined",
11475 code
->label1
->value
, &code
->label1
->where
);
11477 && (code
->expr1
->expr_type
!= EXPR_VARIABLE
11478 || code
->expr1
->symtree
->n
.sym
->ts
.type
!= BT_INTEGER
11479 || code
->expr1
->symtree
->n
.sym
->ts
.kind
11480 != gfc_default_integer_kind
11481 || code
->expr1
->symtree
->n
.sym
->as
!= NULL
))
11482 gfc_error ("ASSIGN statement at %L requires a scalar "
11483 "default INTEGER variable", &code
->expr1
->where
);
11486 case EXEC_POINTER_ASSIGN
:
11493 /* This is both a variable definition and pointer assignment
11494 context, so check both of them. For rank remapping, a final
11495 array ref may be present on the LHS and fool gfc_expr_attr
11496 used in gfc_check_vardef_context. Remove it. */
11497 e
= remove_last_array_ref (code
->expr1
);
11498 t
= gfc_check_vardef_context (e
, true, false, false,
11499 _("pointer assignment"));
11501 t
= gfc_check_vardef_context (e
, false, false, false,
11502 _("pointer assignment"));
11505 t
= gfc_check_pointer_assign (code
->expr1
, code
->expr2
, !t
) && t
;
11510 /* Assigning a class object always is a regular assign. */
11511 if (code
->expr2
->ts
.type
== BT_CLASS
11512 && code
->expr1
->ts
.type
== BT_CLASS
11513 && !CLASS_DATA (code
->expr2
)->attr
.dimension
11514 && !(gfc_expr_attr (code
->expr1
).proc_pointer
11515 && code
->expr2
->expr_type
== EXPR_VARIABLE
11516 && code
->expr2
->symtree
->n
.sym
->attr
.flavor
11518 code
->op
= EXEC_ASSIGN
;
11522 case EXEC_ARITHMETIC_IF
:
11524 gfc_expr
*e
= code
->expr1
;
11526 gfc_resolve_expr (e
);
11527 if (e
->expr_type
== EXPR_NULL
)
11528 gfc_error ("Invalid NULL at %L", &e
->where
);
11530 if (t
&& (e
->rank
> 0
11531 || !(e
->ts
.type
== BT_REAL
|| e
->ts
.type
== BT_INTEGER
)))
11532 gfc_error ("Arithmetic IF statement at %L requires a scalar "
11533 "REAL or INTEGER expression", &e
->where
);
11535 resolve_branch (code
->label1
, code
);
11536 resolve_branch (code
->label2
, code
);
11537 resolve_branch (code
->label3
, code
);
11542 if (t
&& code
->expr1
!= NULL
11543 && (code
->expr1
->ts
.type
!= BT_LOGICAL
11544 || code
->expr1
->rank
!= 0))
11545 gfc_error ("IF clause at %L requires a scalar LOGICAL expression",
11546 &code
->expr1
->where
);
11551 resolve_call (code
);
11554 case EXEC_COMPCALL
:
11556 resolve_typebound_subroutine (code
);
11559 case EXEC_CALL_PPC
:
11560 resolve_ppc_call (code
);
11564 /* Select is complicated. Also, a SELECT construct could be
11565 a transformed computed GOTO. */
11566 resolve_select (code
, false);
11569 case EXEC_SELECT_TYPE
:
11570 resolve_select_type (code
, ns
);
11574 resolve_block_construct (code
);
11578 if (code
->ext
.iterator
!= NULL
)
11580 gfc_iterator
*iter
= code
->ext
.iterator
;
11581 if (gfc_resolve_iterator (iter
, true, false))
11582 gfc_resolve_do_iterator (code
, iter
->var
->symtree
->n
.sym
,
11587 case EXEC_DO_WHILE
:
11588 if (code
->expr1
== NULL
)
11589 gfc_internal_error ("gfc_resolve_code(): No expression on "
11592 && (code
->expr1
->rank
!= 0
11593 || code
->expr1
->ts
.type
!= BT_LOGICAL
))
11594 gfc_error ("Exit condition of DO WHILE loop at %L must be "
11595 "a scalar LOGICAL expression", &code
->expr1
->where
);
11598 case EXEC_ALLOCATE
:
11600 resolve_allocate_deallocate (code
, "ALLOCATE");
11604 case EXEC_DEALLOCATE
:
11606 resolve_allocate_deallocate (code
, "DEALLOCATE");
11611 if (!gfc_resolve_open (code
->ext
.open
))
11614 resolve_branch (code
->ext
.open
->err
, code
);
11618 if (!gfc_resolve_close (code
->ext
.close
))
11621 resolve_branch (code
->ext
.close
->err
, code
);
11624 case EXEC_BACKSPACE
:
11628 if (!gfc_resolve_filepos (code
->ext
.filepos
, &code
->loc
))
11631 resolve_branch (code
->ext
.filepos
->err
, code
);
11635 if (!gfc_resolve_inquire (code
->ext
.inquire
))
11638 resolve_branch (code
->ext
.inquire
->err
, code
);
11641 case EXEC_IOLENGTH
:
11642 gcc_assert (code
->ext
.inquire
!= NULL
);
11643 if (!gfc_resolve_inquire (code
->ext
.inquire
))
11646 resolve_branch (code
->ext
.inquire
->err
, code
);
11650 if (!gfc_resolve_wait (code
->ext
.wait
))
11653 resolve_branch (code
->ext
.wait
->err
, code
);
11654 resolve_branch (code
->ext
.wait
->end
, code
);
11655 resolve_branch (code
->ext
.wait
->eor
, code
);
11660 if (!gfc_resolve_dt (code
->ext
.dt
, &code
->loc
))
11663 resolve_branch (code
->ext
.dt
->err
, code
);
11664 resolve_branch (code
->ext
.dt
->end
, code
);
11665 resolve_branch (code
->ext
.dt
->eor
, code
);
11668 case EXEC_TRANSFER
:
11669 resolve_transfer (code
);
11672 case EXEC_DO_CONCURRENT
:
11674 resolve_forall_iterators (code
->ext
.forall_iterator
);
11676 if (code
->expr1
!= NULL
11677 && (code
->expr1
->ts
.type
!= BT_LOGICAL
|| code
->expr1
->rank
))
11678 gfc_error ("FORALL mask clause at %L requires a scalar LOGICAL "
11679 "expression", &code
->expr1
->where
);
11682 case EXEC_OACC_PARALLEL_LOOP
:
11683 case EXEC_OACC_PARALLEL
:
11684 case EXEC_OACC_KERNELS_LOOP
:
11685 case EXEC_OACC_KERNELS
:
11686 case EXEC_OACC_DATA
:
11687 case EXEC_OACC_HOST_DATA
:
11688 case EXEC_OACC_LOOP
:
11689 case EXEC_OACC_UPDATE
:
11690 case EXEC_OACC_WAIT
:
11691 case EXEC_OACC_CACHE
:
11692 case EXEC_OACC_ENTER_DATA
:
11693 case EXEC_OACC_EXIT_DATA
:
11694 case EXEC_OACC_ATOMIC
:
11695 case EXEC_OACC_DECLARE
:
11696 gfc_resolve_oacc_directive (code
, ns
);
11699 case EXEC_OMP_ATOMIC
:
11700 case EXEC_OMP_BARRIER
:
11701 case EXEC_OMP_CANCEL
:
11702 case EXEC_OMP_CANCELLATION_POINT
:
11703 case EXEC_OMP_CRITICAL
:
11704 case EXEC_OMP_FLUSH
:
11705 case EXEC_OMP_DISTRIBUTE
:
11706 case EXEC_OMP_DISTRIBUTE_PARALLEL_DO
:
11707 case EXEC_OMP_DISTRIBUTE_PARALLEL_DO_SIMD
:
11708 case EXEC_OMP_DISTRIBUTE_SIMD
:
11710 case EXEC_OMP_DO_SIMD
:
11711 case EXEC_OMP_MASTER
:
11712 case EXEC_OMP_ORDERED
:
11713 case EXEC_OMP_SECTIONS
:
11714 case EXEC_OMP_SIMD
:
11715 case EXEC_OMP_SINGLE
:
11716 case EXEC_OMP_TARGET
:
11717 case EXEC_OMP_TARGET_DATA
:
11718 case EXEC_OMP_TARGET_ENTER_DATA
:
11719 case EXEC_OMP_TARGET_EXIT_DATA
:
11720 case EXEC_OMP_TARGET_PARALLEL
:
11721 case EXEC_OMP_TARGET_PARALLEL_DO
:
11722 case EXEC_OMP_TARGET_PARALLEL_DO_SIMD
:
11723 case EXEC_OMP_TARGET_SIMD
:
11724 case EXEC_OMP_TARGET_TEAMS
:
11725 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE
:
11726 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO
:
11727 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
11728 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_SIMD
:
11729 case EXEC_OMP_TARGET_UPDATE
:
11730 case EXEC_OMP_TASK
:
11731 case EXEC_OMP_TASKGROUP
:
11732 case EXEC_OMP_TASKLOOP
:
11733 case EXEC_OMP_TASKLOOP_SIMD
:
11734 case EXEC_OMP_TASKWAIT
:
11735 case EXEC_OMP_TASKYIELD
:
11736 case EXEC_OMP_TEAMS
:
11737 case EXEC_OMP_TEAMS_DISTRIBUTE
:
11738 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO
:
11739 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
11740 case EXEC_OMP_TEAMS_DISTRIBUTE_SIMD
:
11741 case EXEC_OMP_WORKSHARE
:
11742 gfc_resolve_omp_directive (code
, ns
);
11745 case EXEC_OMP_PARALLEL
:
11746 case EXEC_OMP_PARALLEL_DO
:
11747 case EXEC_OMP_PARALLEL_DO_SIMD
:
11748 case EXEC_OMP_PARALLEL_SECTIONS
:
11749 case EXEC_OMP_PARALLEL_WORKSHARE
:
11750 omp_workshare_save
= omp_workshare_flag
;
11751 omp_workshare_flag
= 0;
11752 gfc_resolve_omp_directive (code
, ns
);
11753 omp_workshare_flag
= omp_workshare_save
;
11757 gfc_internal_error ("gfc_resolve_code(): Bad statement code");
11761 cs_base
= frame
.prev
;
11765 /* Resolve initial values and make sure they are compatible with
11769 resolve_values (gfc_symbol
*sym
)
11773 if (sym
->value
== NULL
)
11776 if (sym
->value
->expr_type
== EXPR_STRUCTURE
)
11777 t
= resolve_structure_cons (sym
->value
, 1);
11779 t
= gfc_resolve_expr (sym
->value
);
11784 gfc_check_assign_symbol (sym
, NULL
, sym
->value
);
11788 /* Verify any BIND(C) derived types in the namespace so we can report errors
11789 for them once, rather than for each variable declared of that type. */
11792 resolve_bind_c_derived_types (gfc_symbol
*derived_sym
)
11794 if (derived_sym
!= NULL
&& derived_sym
->attr
.flavor
== FL_DERIVED
11795 && derived_sym
->attr
.is_bind_c
== 1)
11796 verify_bind_c_derived_type (derived_sym
);
11802 /* Check the interfaces of DTIO procedures associated with derived
11803 type 'sym'. These procedures can either have typebound bindings or
11804 can appear in DTIO generic interfaces. */
11807 gfc_verify_DTIO_procedures (gfc_symbol
*sym
)
11809 if (!sym
|| sym
->attr
.flavor
!= FL_DERIVED
)
11812 gfc_check_dtio_interfaces (sym
);
11817 /* Verify that any binding labels used in a given namespace do not collide
11818 with the names or binding labels of any global symbols. Multiple INTERFACE
11819 for the same procedure are permitted. */
11822 gfc_verify_binding_labels (gfc_symbol
*sym
)
11825 const char *module
;
11827 if (!sym
|| !sym
->attr
.is_bind_c
|| sym
->attr
.is_iso_c
11828 || sym
->attr
.flavor
== FL_DERIVED
|| !sym
->binding_label
)
11831 gsym
= gfc_find_case_gsymbol (gfc_gsym_root
, sym
->binding_label
);
11834 module
= sym
->module
;
11835 else if (sym
->ns
&& sym
->ns
->proc_name
11836 && sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
)
11837 module
= sym
->ns
->proc_name
->name
;
11838 else if (sym
->ns
&& sym
->ns
->parent
11839 && sym
->ns
&& sym
->ns
->parent
->proc_name
11840 && sym
->ns
->parent
->proc_name
->attr
.flavor
== FL_MODULE
)
11841 module
= sym
->ns
->parent
->proc_name
->name
;
11847 && (gsym
->type
== GSYM_FUNCTION
|| gsym
->type
== GSYM_SUBROUTINE
)))
11850 gsym
= gfc_get_gsymbol (sym
->binding_label
);
11851 gsym
->where
= sym
->declared_at
;
11852 gsym
->sym_name
= sym
->name
;
11853 gsym
->binding_label
= sym
->binding_label
;
11854 gsym
->ns
= sym
->ns
;
11855 gsym
->mod_name
= module
;
11856 if (sym
->attr
.function
)
11857 gsym
->type
= GSYM_FUNCTION
;
11858 else if (sym
->attr
.subroutine
)
11859 gsym
->type
= GSYM_SUBROUTINE
;
11860 /* Mark as variable/procedure as defined, unless its an INTERFACE. */
11861 gsym
->defined
= sym
->attr
.if_source
!= IFSRC_IFBODY
;
11865 if (sym
->attr
.flavor
== FL_VARIABLE
&& gsym
->type
!= GSYM_UNKNOWN
)
11867 gfc_error ("Variable %qs with binding label %qs at %L uses the same global "
11868 "identifier as entity at %L", sym
->name
,
11869 sym
->binding_label
, &sym
->declared_at
, &gsym
->where
);
11870 /* Clear the binding label to prevent checking multiple times. */
11871 sym
->binding_label
= NULL
;
11875 if (sym
->attr
.flavor
== FL_VARIABLE
&& module
11876 && (strcmp (module
, gsym
->mod_name
) != 0
11877 || strcmp (sym
->name
, gsym
->sym_name
) != 0))
11879 /* This can only happen if the variable is defined in a module - if it
11880 isn't the same module, reject it. */
11881 gfc_error ("Variable %qs from module %qs with binding label %qs at %L "
11882 "uses the same global identifier as entity at %L from module %qs",
11883 sym
->name
, module
, sym
->binding_label
,
11884 &sym
->declared_at
, &gsym
->where
, gsym
->mod_name
);
11885 sym
->binding_label
= NULL
;
11889 if ((sym
->attr
.function
|| sym
->attr
.subroutine
)
11890 && ((gsym
->type
!= GSYM_SUBROUTINE
&& gsym
->type
!= GSYM_FUNCTION
)
11891 || (gsym
->defined
&& sym
->attr
.if_source
!= IFSRC_IFBODY
))
11892 && (sym
!= gsym
->ns
->proc_name
&& sym
->attr
.entry
== 0)
11893 && (module
!= gsym
->mod_name
11894 || strcmp (gsym
->sym_name
, sym
->name
) != 0
11895 || (module
&& strcmp (module
, gsym
->mod_name
) != 0)))
11897 /* Print an error if the procedure is defined multiple times; we have to
11898 exclude references to the same procedure via module association or
11899 multiple checks for the same procedure. */
11900 gfc_error ("Procedure %qs with binding label %qs at %L uses the same "
11901 "global identifier as entity at %L", sym
->name
,
11902 sym
->binding_label
, &sym
->declared_at
, &gsym
->where
);
11903 sym
->binding_label
= NULL
;
11908 /* Resolve an index expression. */
11911 resolve_index_expr (gfc_expr
*e
)
11913 if (!gfc_resolve_expr (e
))
11916 if (!gfc_simplify_expr (e
, 0))
11919 if (!gfc_specification_expr (e
))
11926 /* Resolve a charlen structure. */
11929 resolve_charlen (gfc_charlen
*cl
)
11932 bool saved_specification_expr
;
11938 saved_specification_expr
= specification_expr
;
11939 specification_expr
= true;
11941 if (cl
->length_from_typespec
)
11943 if (!gfc_resolve_expr (cl
->length
))
11945 specification_expr
= saved_specification_expr
;
11949 if (!gfc_simplify_expr (cl
->length
, 0))
11951 specification_expr
= saved_specification_expr
;
11955 /* cl->length has been resolved. It should have an integer type. */
11956 if (cl
->length
->ts
.type
!= BT_INTEGER
)
11958 gfc_error ("Scalar INTEGER expression expected at %L",
11959 &cl
->length
->where
);
11965 if (!resolve_index_expr (cl
->length
))
11967 specification_expr
= saved_specification_expr
;
11972 /* F2008, 4.4.3.2: If the character length parameter value evaluates to
11973 a negative value, the length of character entities declared is zero. */
11974 if (cl
->length
&& cl
->length
->expr_type
== EXPR_CONSTANT
11975 && mpz_sgn (cl
->length
->value
.integer
) < 0)
11976 gfc_replace_expr (cl
->length
,
11977 gfc_get_int_expr (gfc_charlen_int_kind
, NULL
, 0));
11979 /* Check that the character length is not too large. */
11980 k
= gfc_validate_kind (BT_INTEGER
, gfc_charlen_int_kind
, false);
11981 if (cl
->length
&& cl
->length
->expr_type
== EXPR_CONSTANT
11982 && cl
->length
->ts
.type
== BT_INTEGER
11983 && mpz_cmp (cl
->length
->value
.integer
, gfc_integer_kinds
[k
].huge
) > 0)
11985 gfc_error ("String length at %L is too large", &cl
->length
->where
);
11986 specification_expr
= saved_specification_expr
;
11990 specification_expr
= saved_specification_expr
;
11995 /* Test for non-constant shape arrays. */
11998 is_non_constant_shape_array (gfc_symbol
*sym
)
12004 not_constant
= false;
12005 if (sym
->as
!= NULL
)
12007 /* Unfortunately, !gfc_is_compile_time_shape hits a legal case that
12008 has not been simplified; parameter array references. Do the
12009 simplification now. */
12010 for (i
= 0; i
< sym
->as
->rank
+ sym
->as
->corank
; i
++)
12012 e
= sym
->as
->lower
[i
];
12013 if (e
&& (!resolve_index_expr(e
)
12014 || !gfc_is_constant_expr (e
)))
12015 not_constant
= true;
12016 e
= sym
->as
->upper
[i
];
12017 if (e
&& (!resolve_index_expr(e
)
12018 || !gfc_is_constant_expr (e
)))
12019 not_constant
= true;
12022 return not_constant
;
12025 /* Given a symbol and an initialization expression, add code to initialize
12026 the symbol to the function entry. */
12028 build_init_assign (gfc_symbol
*sym
, gfc_expr
*init
)
12032 gfc_namespace
*ns
= sym
->ns
;
12034 /* Search for the function namespace if this is a contained
12035 function without an explicit result. */
12036 if (sym
->attr
.function
&& sym
== sym
->result
12037 && sym
->name
!= sym
->ns
->proc_name
->name
)
12039 ns
= ns
->contained
;
12040 for (;ns
; ns
= ns
->sibling
)
12041 if (strcmp (ns
->proc_name
->name
, sym
->name
) == 0)
12047 gfc_free_expr (init
);
12051 /* Build an l-value expression for the result. */
12052 lval
= gfc_lval_expr_from_sym (sym
);
12054 /* Add the code at scope entry. */
12055 init_st
= gfc_get_code (EXEC_INIT_ASSIGN
);
12056 init_st
->next
= ns
->code
;
12057 ns
->code
= init_st
;
12059 /* Assign the default initializer to the l-value. */
12060 init_st
->loc
= sym
->declared_at
;
12061 init_st
->expr1
= lval
;
12062 init_st
->expr2
= init
;
12066 /* Whether or not we can generate a default initializer for a symbol. */
12069 can_generate_init (gfc_symbol
*sym
)
12071 symbol_attribute
*a
;
12076 /* These symbols should never have a default initialization. */
12081 || (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
)
12082 && (CLASS_DATA (sym
)->attr
.class_pointer
12083 || CLASS_DATA (sym
)->attr
.proc_pointer
))
12084 || a
->in_equivalence
12091 || (!a
->referenced
&& !a
->result
)
12092 || (a
->dummy
&& a
->intent
!= INTENT_OUT
)
12093 || (a
->function
&& sym
!= sym
->result
)
12098 /* Assign the default initializer to a derived type variable or result. */
12101 apply_default_init (gfc_symbol
*sym
)
12103 gfc_expr
*init
= NULL
;
12105 if (sym
->attr
.flavor
!= FL_VARIABLE
&& !sym
->attr
.function
)
12108 if (sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
)
12109 init
= gfc_generate_initializer (&sym
->ts
, can_generate_init (sym
));
12111 if (init
== NULL
&& sym
->ts
.type
!= BT_CLASS
)
12114 build_init_assign (sym
, init
);
12115 sym
->attr
.referenced
= 1;
12119 /* Build an initializer for a local. Returns null if the symbol should not have
12120 a default initialization. */
12123 build_default_init_expr (gfc_symbol
*sym
)
12125 /* These symbols should never have a default initialization. */
12126 if (sym
->attr
.allocatable
12127 || sym
->attr
.external
12129 || sym
->attr
.pointer
12130 || sym
->attr
.in_equivalence
12131 || sym
->attr
.in_common
12134 || sym
->attr
.cray_pointee
12135 || sym
->attr
.cray_pointer
12139 /* Get the appropriate init expression. */
12140 return gfc_build_default_init_expr (&sym
->ts
, &sym
->declared_at
);
12143 /* Add an initialization expression to a local variable. */
12145 apply_default_init_local (gfc_symbol
*sym
)
12147 gfc_expr
*init
= NULL
;
12149 /* The symbol should be a variable or a function return value. */
12150 if ((sym
->attr
.flavor
!= FL_VARIABLE
&& !sym
->attr
.function
)
12151 || (sym
->attr
.function
&& sym
->result
!= sym
))
12154 /* Try to build the initializer expression. If we can't initialize
12155 this symbol, then init will be NULL. */
12156 init
= build_default_init_expr (sym
);
12160 /* For saved variables, we don't want to add an initializer at function
12161 entry, so we just add a static initializer. Note that automatic variables
12162 are stack allocated even with -fno-automatic; we have also to exclude
12163 result variable, which are also nonstatic. */
12164 if (!sym
->attr
.automatic
12165 && (sym
->attr
.save
|| sym
->ns
->save_all
12166 || (flag_max_stack_var_size
== 0 && !sym
->attr
.result
12167 && (sym
->ns
->proc_name
&& !sym
->ns
->proc_name
->attr
.recursive
)
12168 && (!sym
->attr
.dimension
|| !is_non_constant_shape_array (sym
)))))
12170 /* Don't clobber an existing initializer! */
12171 gcc_assert (sym
->value
== NULL
);
12176 build_init_assign (sym
, init
);
12180 /* Resolution of common features of flavors variable and procedure. */
12183 resolve_fl_var_and_proc (gfc_symbol
*sym
, int mp_flag
)
12185 gfc_array_spec
*as
;
12187 if (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
)
12188 as
= CLASS_DATA (sym
)->as
;
12192 /* Constraints on deferred shape variable. */
12193 if (as
== NULL
|| as
->type
!= AS_DEFERRED
)
12195 bool pointer
, allocatable
, dimension
;
12197 if (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
)
12199 pointer
= CLASS_DATA (sym
)->attr
.class_pointer
;
12200 allocatable
= CLASS_DATA (sym
)->attr
.allocatable
;
12201 dimension
= CLASS_DATA (sym
)->attr
.dimension
;
12205 pointer
= sym
->attr
.pointer
&& !sym
->attr
.select_type_temporary
;
12206 allocatable
= sym
->attr
.allocatable
;
12207 dimension
= sym
->attr
.dimension
;
12212 if (dimension
&& as
->type
!= AS_ASSUMED_RANK
)
12214 gfc_error ("Allocatable array %qs at %L must have a deferred "
12215 "shape or assumed rank", sym
->name
, &sym
->declared_at
);
12218 else if (!gfc_notify_std (GFC_STD_F2003
, "Scalar object "
12219 "%qs at %L may not be ALLOCATABLE",
12220 sym
->name
, &sym
->declared_at
))
12224 if (pointer
&& dimension
&& as
->type
!= AS_ASSUMED_RANK
)
12226 gfc_error ("Array pointer %qs at %L must have a deferred shape or "
12227 "assumed rank", sym
->name
, &sym
->declared_at
);
12233 if (!mp_flag
&& !sym
->attr
.allocatable
&& !sym
->attr
.pointer
12234 && sym
->ts
.type
!= BT_CLASS
&& !sym
->assoc
)
12236 gfc_error ("Array %qs at %L cannot have a deferred shape",
12237 sym
->name
, &sym
->declared_at
);
12242 /* Constraints on polymorphic variables. */
12243 if (sym
->ts
.type
== BT_CLASS
&& !(sym
->result
&& sym
->result
!= sym
))
12246 if (sym
->attr
.class_ok
12247 && !sym
->attr
.select_type_temporary
12248 && !UNLIMITED_POLY (sym
)
12249 && !gfc_type_is_extensible (CLASS_DATA (sym
)->ts
.u
.derived
))
12251 gfc_error ("Type %qs of CLASS variable %qs at %L is not extensible",
12252 CLASS_DATA (sym
)->ts
.u
.derived
->name
, sym
->name
,
12253 &sym
->declared_at
);
12258 /* Assume that use associated symbols were checked in the module ns.
12259 Class-variables that are associate-names are also something special
12260 and excepted from the test. */
12261 if (!sym
->attr
.class_ok
&& !sym
->attr
.use_assoc
&& !sym
->assoc
)
12263 gfc_error ("CLASS variable %qs at %L must be dummy, allocatable "
12264 "or pointer", sym
->name
, &sym
->declared_at
);
12273 /* Additional checks for symbols with flavor variable and derived
12274 type. To be called from resolve_fl_variable. */
12277 resolve_fl_variable_derived (gfc_symbol
*sym
, int no_init_flag
)
12279 gcc_assert (sym
->ts
.type
== BT_DERIVED
|| sym
->ts
.type
== BT_CLASS
);
12281 /* Check to see if a derived type is blocked from being host
12282 associated by the presence of another class I symbol in the same
12283 namespace. 14.6.1.3 of the standard and the discussion on
12284 comp.lang.fortran. */
12285 if (sym
->ns
!= sym
->ts
.u
.derived
->ns
12286 && !sym
->ts
.u
.derived
->attr
.use_assoc
12287 && sym
->ns
->proc_name
->attr
.if_source
!= IFSRC_IFBODY
)
12290 gfc_find_symbol (sym
->ts
.u
.derived
->name
, sym
->ns
, 0, &s
);
12291 if (s
&& s
->attr
.generic
)
12292 s
= gfc_find_dt_in_generic (s
);
12293 if (s
&& !gfc_fl_struct (s
->attr
.flavor
))
12295 gfc_error ("The type %qs cannot be host associated at %L "
12296 "because it is blocked by an incompatible object "
12297 "of the same name declared at %L",
12298 sym
->ts
.u
.derived
->name
, &sym
->declared_at
,
12304 /* 4th constraint in section 11.3: "If an object of a type for which
12305 component-initialization is specified (R429) appears in the
12306 specification-part of a module and does not have the ALLOCATABLE
12307 or POINTER attribute, the object shall have the SAVE attribute."
12309 The check for initializers is performed with
12310 gfc_has_default_initializer because gfc_default_initializer generates
12311 a hidden default for allocatable components. */
12312 if (!(sym
->value
|| no_init_flag
) && sym
->ns
->proc_name
12313 && sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
12314 && !(sym
->ns
->save_all
&& !sym
->attr
.automatic
) && !sym
->attr
.save
12315 && !sym
->attr
.pointer
&& !sym
->attr
.allocatable
12316 && gfc_has_default_initializer (sym
->ts
.u
.derived
)
12317 && !gfc_notify_std (GFC_STD_F2008
, "Implied SAVE for module variable "
12318 "%qs at %L, needed due to the default "
12319 "initialization", sym
->name
, &sym
->declared_at
))
12322 /* Assign default initializer. */
12323 if (!(sym
->value
|| sym
->attr
.pointer
|| sym
->attr
.allocatable
)
12324 && (!no_init_flag
|| sym
->attr
.intent
== INTENT_OUT
))
12325 sym
->value
= gfc_generate_initializer (&sym
->ts
, can_generate_init (sym
));
12331 /* F2008, C402 (R401): A colon shall not be used as a type-param-value
12332 except in the declaration of an entity or component that has the POINTER
12333 or ALLOCATABLE attribute. */
12336 deferred_requirements (gfc_symbol
*sym
)
12338 if (sym
->ts
.deferred
12339 && !(sym
->attr
.pointer
12340 || sym
->attr
.allocatable
12341 || sym
->attr
.associate_var
12342 || sym
->attr
.omp_udr_artificial_var
))
12344 gfc_error ("Entity %qs at %L has a deferred type parameter and "
12345 "requires either the POINTER or ALLOCATABLE attribute",
12346 sym
->name
, &sym
->declared_at
);
12353 /* Resolve symbols with flavor variable. */
12356 resolve_fl_variable (gfc_symbol
*sym
, int mp_flag
)
12358 const char *auto_save_msg
= "Automatic object %qs at %L cannot have the "
12361 if (!resolve_fl_var_and_proc (sym
, mp_flag
))
12364 /* Set this flag to check that variables are parameters of all entries.
12365 This check is effected by the call to gfc_resolve_expr through
12366 is_non_constant_shape_array. */
12367 bool saved_specification_expr
= specification_expr
;
12368 specification_expr
= true;
12370 if (sym
->ns
->proc_name
12371 && (sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
12372 || sym
->ns
->proc_name
->attr
.is_main_program
)
12373 && !sym
->attr
.use_assoc
12374 && !sym
->attr
.allocatable
12375 && !sym
->attr
.pointer
12376 && is_non_constant_shape_array (sym
))
12378 /* F08:C541. The shape of an array defined in a main program or module
12379 * needs to be constant. */
12380 gfc_error ("The module or main program array %qs at %L must "
12381 "have constant shape", sym
->name
, &sym
->declared_at
);
12382 specification_expr
= saved_specification_expr
;
12386 /* Constraints on deferred type parameter. */
12387 if (!deferred_requirements (sym
))
12390 if (sym
->ts
.type
== BT_CHARACTER
&& !sym
->attr
.associate_var
)
12392 /* Make sure that character string variables with assumed length are
12393 dummy arguments. */
12394 gfc_expr
*e
= NULL
;
12397 e
= sym
->ts
.u
.cl
->length
;
12401 if (e
== NULL
&& !sym
->attr
.dummy
&& !sym
->attr
.result
12402 && !sym
->ts
.deferred
&& !sym
->attr
.select_type_temporary
12403 && !sym
->attr
.omp_udr_artificial_var
)
12405 gfc_error ("Entity with assumed character length at %L must be a "
12406 "dummy argument or a PARAMETER", &sym
->declared_at
);
12407 specification_expr
= saved_specification_expr
;
12411 if (e
&& sym
->attr
.save
== SAVE_EXPLICIT
&& !gfc_is_constant_expr (e
))
12413 gfc_error (auto_save_msg
, sym
->name
, &sym
->declared_at
);
12414 specification_expr
= saved_specification_expr
;
12418 if (!gfc_is_constant_expr (e
)
12419 && !(e
->expr_type
== EXPR_VARIABLE
12420 && e
->symtree
->n
.sym
->attr
.flavor
== FL_PARAMETER
))
12422 if (!sym
->attr
.use_assoc
&& sym
->ns
->proc_name
12423 && (sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
12424 || sym
->ns
->proc_name
->attr
.is_main_program
))
12426 gfc_error ("%qs at %L must have constant character length "
12427 "in this context", sym
->name
, &sym
->declared_at
);
12428 specification_expr
= saved_specification_expr
;
12431 if (sym
->attr
.in_common
)
12433 gfc_error ("COMMON variable %qs at %L must have constant "
12434 "character length", sym
->name
, &sym
->declared_at
);
12435 specification_expr
= saved_specification_expr
;
12441 if (sym
->value
== NULL
&& sym
->attr
.referenced
)
12442 apply_default_init_local (sym
); /* Try to apply a default initialization. */
12444 /* Determine if the symbol may not have an initializer. */
12445 int no_init_flag
= 0, automatic_flag
= 0;
12446 if (sym
->attr
.allocatable
|| sym
->attr
.external
|| sym
->attr
.dummy
12447 || sym
->attr
.intrinsic
|| sym
->attr
.result
)
12449 else if ((sym
->attr
.dimension
|| sym
->attr
.codimension
) && !sym
->attr
.pointer
12450 && is_non_constant_shape_array (sym
))
12452 no_init_flag
= automatic_flag
= 1;
12454 /* Also, they must not have the SAVE attribute.
12455 SAVE_IMPLICIT is checked below. */
12456 if (sym
->as
&& sym
->attr
.codimension
)
12458 int corank
= sym
->as
->corank
;
12459 sym
->as
->corank
= 0;
12460 no_init_flag
= automatic_flag
= is_non_constant_shape_array (sym
);
12461 sym
->as
->corank
= corank
;
12463 if (automatic_flag
&& sym
->attr
.save
== SAVE_EXPLICIT
)
12465 gfc_error (auto_save_msg
, sym
->name
, &sym
->declared_at
);
12466 specification_expr
= saved_specification_expr
;
12471 /* Ensure that any initializer is simplified. */
12473 gfc_simplify_expr (sym
->value
, 1);
12475 /* Reject illegal initializers. */
12476 if (!sym
->mark
&& sym
->value
)
12478 if (sym
->attr
.allocatable
|| (sym
->ts
.type
== BT_CLASS
12479 && CLASS_DATA (sym
)->attr
.allocatable
))
12480 gfc_error ("Allocatable %qs at %L cannot have an initializer",
12481 sym
->name
, &sym
->declared_at
);
12482 else if (sym
->attr
.external
)
12483 gfc_error ("External %qs at %L cannot have an initializer",
12484 sym
->name
, &sym
->declared_at
);
12485 else if (sym
->attr
.dummy
12486 && !(sym
->ts
.type
== BT_DERIVED
&& sym
->attr
.intent
== INTENT_OUT
))
12487 gfc_error ("Dummy %qs at %L cannot have an initializer",
12488 sym
->name
, &sym
->declared_at
);
12489 else if (sym
->attr
.intrinsic
)
12490 gfc_error ("Intrinsic %qs at %L cannot have an initializer",
12491 sym
->name
, &sym
->declared_at
);
12492 else if (sym
->attr
.result
)
12493 gfc_error ("Function result %qs at %L cannot have an initializer",
12494 sym
->name
, &sym
->declared_at
);
12495 else if (automatic_flag
)
12496 gfc_error ("Automatic array %qs at %L cannot have an initializer",
12497 sym
->name
, &sym
->declared_at
);
12499 goto no_init_error
;
12500 specification_expr
= saved_specification_expr
;
12505 if (sym
->ts
.type
== BT_DERIVED
|| sym
->ts
.type
== BT_CLASS
)
12507 bool res
= resolve_fl_variable_derived (sym
, no_init_flag
);
12508 specification_expr
= saved_specification_expr
;
12512 specification_expr
= saved_specification_expr
;
12517 /* Compare the dummy characteristics of a module procedure interface
12518 declaration with the corresponding declaration in a submodule. */
12519 static gfc_formal_arglist
*new_formal
;
12520 static char errmsg
[200];
12523 compare_fsyms (gfc_symbol
*sym
)
12527 if (sym
== NULL
|| new_formal
== NULL
)
12530 fsym
= new_formal
->sym
;
12535 if (strcmp (sym
->name
, fsym
->name
) == 0)
12537 if (!gfc_check_dummy_characteristics (fsym
, sym
, true, errmsg
, 200))
12538 gfc_error ("%s at %L", errmsg
, &fsym
->declared_at
);
12543 /* Resolve a procedure. */
12546 resolve_fl_procedure (gfc_symbol
*sym
, int mp_flag
)
12548 gfc_formal_arglist
*arg
;
12550 if (sym
->attr
.function
12551 && !resolve_fl_var_and_proc (sym
, mp_flag
))
12554 if (sym
->ts
.type
== BT_CHARACTER
)
12556 gfc_charlen
*cl
= sym
->ts
.u
.cl
;
12558 if (cl
&& cl
->length
&& gfc_is_constant_expr (cl
->length
)
12559 && !resolve_charlen (cl
))
12562 if ((!cl
|| !cl
->length
|| cl
->length
->expr_type
!= EXPR_CONSTANT
)
12563 && sym
->attr
.proc
== PROC_ST_FUNCTION
)
12565 gfc_error ("Character-valued statement function %qs at %L must "
12566 "have constant length", sym
->name
, &sym
->declared_at
);
12571 /* Ensure that derived type for are not of a private type. Internal
12572 module procedures are excluded by 2.2.3.3 - i.e., they are not
12573 externally accessible and can access all the objects accessible in
12575 if (!(sym
->ns
->parent
&& sym
->ns
->parent
->proc_name
12576 && sym
->ns
->parent
->proc_name
->attr
.flavor
== FL_MODULE
)
12577 && gfc_check_symbol_access (sym
))
12579 gfc_interface
*iface
;
12581 for (arg
= gfc_sym_get_dummy_args (sym
); arg
; arg
= arg
->next
)
12584 && arg
->sym
->ts
.type
== BT_DERIVED
12585 && !arg
->sym
->ts
.u
.derived
->attr
.use_assoc
12586 && !gfc_check_symbol_access (arg
->sym
->ts
.u
.derived
)
12587 && !gfc_notify_std (GFC_STD_F2003
, "%qs is of a PRIVATE type "
12588 "and cannot be a dummy argument"
12589 " of %qs, which is PUBLIC at %L",
12590 arg
->sym
->name
, sym
->name
,
12591 &sym
->declared_at
))
12593 /* Stop this message from recurring. */
12594 arg
->sym
->ts
.u
.derived
->attr
.access
= ACCESS_PUBLIC
;
12599 /* PUBLIC interfaces may expose PRIVATE procedures that take types
12600 PRIVATE to the containing module. */
12601 for (iface
= sym
->generic
; iface
; iface
= iface
->next
)
12603 for (arg
= gfc_sym_get_dummy_args (iface
->sym
); arg
; arg
= arg
->next
)
12606 && arg
->sym
->ts
.type
== BT_DERIVED
12607 && !arg
->sym
->ts
.u
.derived
->attr
.use_assoc
12608 && !gfc_check_symbol_access (arg
->sym
->ts
.u
.derived
)
12609 && !gfc_notify_std (GFC_STD_F2003
, "Procedure %qs in "
12610 "PUBLIC interface %qs at %L "
12611 "takes dummy arguments of %qs which "
12612 "is PRIVATE", iface
->sym
->name
,
12613 sym
->name
, &iface
->sym
->declared_at
,
12614 gfc_typename(&arg
->sym
->ts
)))
12616 /* Stop this message from recurring. */
12617 arg
->sym
->ts
.u
.derived
->attr
.access
= ACCESS_PUBLIC
;
12624 if (sym
->attr
.function
&& sym
->value
&& sym
->attr
.proc
!= PROC_ST_FUNCTION
12625 && !sym
->attr
.proc_pointer
)
12627 gfc_error ("Function %qs at %L cannot have an initializer",
12628 sym
->name
, &sym
->declared_at
);
12630 /* Make sure no second error is issued for this. */
12631 sym
->value
->error
= 1;
12635 /* An external symbol may not have an initializer because it is taken to be
12636 a procedure. Exception: Procedure Pointers. */
12637 if (sym
->attr
.external
&& sym
->value
&& !sym
->attr
.proc_pointer
)
12639 gfc_error ("External object %qs at %L may not have an initializer",
12640 sym
->name
, &sym
->declared_at
);
12644 /* An elemental function is required to return a scalar 12.7.1 */
12645 if (sym
->attr
.elemental
&& sym
->attr
.function
12646 && (sym
->as
|| (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
)->as
)))
12648 gfc_error ("ELEMENTAL function %qs at %L must have a scalar "
12649 "result", sym
->name
, &sym
->declared_at
);
12650 /* Reset so that the error only occurs once. */
12651 sym
->attr
.elemental
= 0;
12655 if (sym
->attr
.proc
== PROC_ST_FUNCTION
12656 && (sym
->attr
.allocatable
|| sym
->attr
.pointer
))
12658 gfc_error ("Statement function %qs at %L may not have pointer or "
12659 "allocatable attribute", sym
->name
, &sym
->declared_at
);
12663 /* 5.1.1.5 of the Standard: A function name declared with an asterisk
12664 char-len-param shall not be array-valued, pointer-valued, recursive
12665 or pure. ....snip... A character value of * may only be used in the
12666 following ways: (i) Dummy arg of procedure - dummy associates with
12667 actual length; (ii) To declare a named constant; or (iii) External
12668 function - but length must be declared in calling scoping unit. */
12669 if (sym
->attr
.function
12670 && sym
->ts
.type
== BT_CHARACTER
&& !sym
->ts
.deferred
12671 && sym
->ts
.u
.cl
&& sym
->ts
.u
.cl
->length
== NULL
)
12673 if ((sym
->as
&& sym
->as
->rank
) || (sym
->attr
.pointer
)
12674 || (sym
->attr
.recursive
) || (sym
->attr
.pure
))
12676 if (sym
->as
&& sym
->as
->rank
)
12677 gfc_error ("CHARACTER(*) function %qs at %L cannot be "
12678 "array-valued", sym
->name
, &sym
->declared_at
);
12680 if (sym
->attr
.pointer
)
12681 gfc_error ("CHARACTER(*) function %qs at %L cannot be "
12682 "pointer-valued", sym
->name
, &sym
->declared_at
);
12684 if (sym
->attr
.pure
)
12685 gfc_error ("CHARACTER(*) function %qs at %L cannot be "
12686 "pure", sym
->name
, &sym
->declared_at
);
12688 if (sym
->attr
.recursive
)
12689 gfc_error ("CHARACTER(*) function %qs at %L cannot be "
12690 "recursive", sym
->name
, &sym
->declared_at
);
12695 /* Appendix B.2 of the standard. Contained functions give an
12696 error anyway. Deferred character length is an F2003 feature.
12697 Don't warn on intrinsic conversion functions, which start
12698 with two underscores. */
12699 if (!sym
->attr
.contained
&& !sym
->ts
.deferred
12700 && (sym
->name
[0] != '_' || sym
->name
[1] != '_'))
12701 gfc_notify_std (GFC_STD_F95_OBS
,
12702 "CHARACTER(*) function %qs at %L",
12703 sym
->name
, &sym
->declared_at
);
12706 /* F2008, C1218. */
12707 if (sym
->attr
.elemental
)
12709 if (sym
->attr
.proc_pointer
)
12711 gfc_error ("Procedure pointer %qs at %L shall not be elemental",
12712 sym
->name
, &sym
->declared_at
);
12715 if (sym
->attr
.dummy
)
12717 gfc_error ("Dummy procedure %qs at %L shall not be elemental",
12718 sym
->name
, &sym
->declared_at
);
12723 /* F2018, C15100: "The result of an elemental function shall be scalar,
12724 and shall not have the POINTER or ALLOCATABLE attribute." The scalar
12725 pointer is tested and caught elsewhere. */
12726 if (sym
->attr
.elemental
&& sym
->result
12727 && (sym
->result
->attr
.allocatable
|| sym
->result
->attr
.pointer
))
12729 gfc_error ("Function result variable %qs at %L of elemental "
12730 "function %qs shall not have an ALLOCATABLE or POINTER "
12731 "attribute", sym
->result
->name
,
12732 &sym
->result
->declared_at
, sym
->name
);
12736 if (sym
->attr
.is_bind_c
&& sym
->attr
.is_c_interop
!= 1)
12738 gfc_formal_arglist
*curr_arg
;
12739 int has_non_interop_arg
= 0;
12741 if (!verify_bind_c_sym (sym
, &(sym
->ts
), sym
->attr
.in_common
,
12742 sym
->common_block
))
12744 /* Clear these to prevent looking at them again if there was an
12746 sym
->attr
.is_bind_c
= 0;
12747 sym
->attr
.is_c_interop
= 0;
12748 sym
->ts
.is_c_interop
= 0;
12752 /* So far, no errors have been found. */
12753 sym
->attr
.is_c_interop
= 1;
12754 sym
->ts
.is_c_interop
= 1;
12757 curr_arg
= gfc_sym_get_dummy_args (sym
);
12758 while (curr_arg
!= NULL
)
12760 /* Skip implicitly typed dummy args here. */
12761 if (curr_arg
->sym
&& curr_arg
->sym
->attr
.implicit_type
== 0)
12762 if (!gfc_verify_c_interop_param (curr_arg
->sym
))
12763 /* If something is found to fail, record the fact so we
12764 can mark the symbol for the procedure as not being
12765 BIND(C) to try and prevent multiple errors being
12767 has_non_interop_arg
= 1;
12769 curr_arg
= curr_arg
->next
;
12772 /* See if any of the arguments were not interoperable and if so, clear
12773 the procedure symbol to prevent duplicate error messages. */
12774 if (has_non_interop_arg
!= 0)
12776 sym
->attr
.is_c_interop
= 0;
12777 sym
->ts
.is_c_interop
= 0;
12778 sym
->attr
.is_bind_c
= 0;
12782 if (!sym
->attr
.proc_pointer
)
12784 if (sym
->attr
.save
== SAVE_EXPLICIT
)
12786 gfc_error ("PROCEDURE attribute conflicts with SAVE attribute "
12787 "in %qs at %L", sym
->name
, &sym
->declared_at
);
12790 if (sym
->attr
.intent
)
12792 gfc_error ("PROCEDURE attribute conflicts with INTENT attribute "
12793 "in %qs at %L", sym
->name
, &sym
->declared_at
);
12796 if (sym
->attr
.subroutine
&& sym
->attr
.result
)
12798 gfc_error ("PROCEDURE attribute conflicts with RESULT attribute "
12799 "in %qs at %L", sym
->name
, &sym
->declared_at
);
12802 if (sym
->attr
.external
&& sym
->attr
.function
&& !sym
->attr
.module_procedure
12803 && ((sym
->attr
.if_source
== IFSRC_DECL
&& !sym
->attr
.procedure
)
12804 || sym
->attr
.contained
))
12806 gfc_error ("EXTERNAL attribute conflicts with FUNCTION attribute "
12807 "in %qs at %L", sym
->name
, &sym
->declared_at
);
12810 if (strcmp ("ppr@", sym
->name
) == 0)
12812 gfc_error ("Procedure pointer result %qs at %L "
12813 "is missing the pointer attribute",
12814 sym
->ns
->proc_name
->name
, &sym
->declared_at
);
12819 /* Assume that a procedure whose body is not known has references
12820 to external arrays. */
12821 if (sym
->attr
.if_source
!= IFSRC_DECL
)
12822 sym
->attr
.array_outer_dependency
= 1;
12824 /* Compare the characteristics of a module procedure with the
12825 interface declaration. Ideally this would be done with
12826 gfc_compare_interfaces but, at present, the formal interface
12827 cannot be copied to the ts.interface. */
12828 if (sym
->attr
.module_procedure
12829 && sym
->attr
.if_source
== IFSRC_DECL
)
12832 char name
[2*GFC_MAX_SYMBOL_LEN
+ 1];
12834 char *submodule_name
;
12835 strcpy (name
, sym
->ns
->proc_name
->name
);
12836 module_name
= strtok (name
, ".");
12837 submodule_name
= strtok (NULL
, ".");
12839 iface
= sym
->tlink
;
12842 /* Make sure that the result uses the correct charlen for deferred
12844 if (iface
&& sym
->result
12845 && iface
->ts
.type
== BT_CHARACTER
12846 && iface
->ts
.deferred
)
12847 sym
->result
->ts
.u
.cl
= iface
->ts
.u
.cl
;
12852 /* Check the procedure characteristics. */
12853 if (sym
->attr
.elemental
!= iface
->attr
.elemental
)
12855 gfc_error ("Mismatch in ELEMENTAL attribute between MODULE "
12856 "PROCEDURE at %L and its interface in %s",
12857 &sym
->declared_at
, module_name
);
12861 if (sym
->attr
.pure
!= iface
->attr
.pure
)
12863 gfc_error ("Mismatch in PURE attribute between MODULE "
12864 "PROCEDURE at %L and its interface in %s",
12865 &sym
->declared_at
, module_name
);
12869 if (sym
->attr
.recursive
!= iface
->attr
.recursive
)
12871 gfc_error ("Mismatch in RECURSIVE attribute between MODULE "
12872 "PROCEDURE at %L and its interface in %s",
12873 &sym
->declared_at
, module_name
);
12877 /* Check the result characteristics. */
12878 if (!gfc_check_result_characteristics (sym
, iface
, errmsg
, 200))
12880 gfc_error ("%s between the MODULE PROCEDURE declaration "
12881 "in MODULE %qs and the declaration at %L in "
12883 errmsg
, module_name
, &sym
->declared_at
,
12884 submodule_name
? submodule_name
: module_name
);
12889 /* Check the characteristics of the formal arguments. */
12890 if (sym
->formal
&& sym
->formal_ns
)
12892 for (arg
= sym
->formal
; arg
&& arg
->sym
; arg
= arg
->next
)
12895 gfc_traverse_ns (sym
->formal_ns
, compare_fsyms
);
12903 /* Resolve a list of finalizer procedures. That is, after they have hopefully
12904 been defined and we now know their defined arguments, check that they fulfill
12905 the requirements of the standard for procedures used as finalizers. */
12908 gfc_resolve_finalizers (gfc_symbol
* derived
, bool *finalizable
)
12910 gfc_finalizer
* list
;
12911 gfc_finalizer
** prev_link
; /* For removing wrong entries from the list. */
12912 bool result
= true;
12913 bool seen_scalar
= false;
12916 gfc_symbol
*parent
= gfc_get_derived_super_type (derived
);
12919 gfc_resolve_finalizers (parent
, finalizable
);
12921 /* Ensure that derived-type components have a their finalizers resolved. */
12922 bool has_final
= derived
->f2k_derived
&& derived
->f2k_derived
->finalizers
;
12923 for (c
= derived
->components
; c
; c
= c
->next
)
12924 if (c
->ts
.type
== BT_DERIVED
12925 && !c
->attr
.pointer
&& !c
->attr
.proc_pointer
&& !c
->attr
.allocatable
)
12927 bool has_final2
= false;
12928 if (!gfc_resolve_finalizers (c
->ts
.u
.derived
, &has_final2
))
12929 return false; /* Error. */
12930 has_final
= has_final
|| has_final2
;
12932 /* Return early if not finalizable. */
12936 *finalizable
= false;
12940 /* Walk over the list of finalizer-procedures, check them, and if any one
12941 does not fit in with the standard's definition, print an error and remove
12942 it from the list. */
12943 prev_link
= &derived
->f2k_derived
->finalizers
;
12944 for (list
= derived
->f2k_derived
->finalizers
; list
; list
= *prev_link
)
12946 gfc_formal_arglist
*dummy_args
;
12951 /* Skip this finalizer if we already resolved it. */
12952 if (list
->proc_tree
)
12954 if (list
->proc_tree
->n
.sym
->formal
->sym
->as
== NULL
12955 || list
->proc_tree
->n
.sym
->formal
->sym
->as
->rank
== 0)
12956 seen_scalar
= true;
12957 prev_link
= &(list
->next
);
12961 /* Check this exists and is a SUBROUTINE. */
12962 if (!list
->proc_sym
->attr
.subroutine
)
12964 gfc_error ("FINAL procedure %qs at %L is not a SUBROUTINE",
12965 list
->proc_sym
->name
, &list
->where
);
12969 /* We should have exactly one argument. */
12970 dummy_args
= gfc_sym_get_dummy_args (list
->proc_sym
);
12971 if (!dummy_args
|| dummy_args
->next
)
12973 gfc_error ("FINAL procedure at %L must have exactly one argument",
12977 arg
= dummy_args
->sym
;
12979 /* This argument must be of our type. */
12980 if (arg
->ts
.type
!= BT_DERIVED
|| arg
->ts
.u
.derived
!= derived
)
12982 gfc_error ("Argument of FINAL procedure at %L must be of type %qs",
12983 &arg
->declared_at
, derived
->name
);
12987 /* It must neither be a pointer nor allocatable nor optional. */
12988 if (arg
->attr
.pointer
)
12990 gfc_error ("Argument of FINAL procedure at %L must not be a POINTER",
12991 &arg
->declared_at
);
12994 if (arg
->attr
.allocatable
)
12996 gfc_error ("Argument of FINAL procedure at %L must not be"
12997 " ALLOCATABLE", &arg
->declared_at
);
13000 if (arg
->attr
.optional
)
13002 gfc_error ("Argument of FINAL procedure at %L must not be OPTIONAL",
13003 &arg
->declared_at
);
13007 /* It must not be INTENT(OUT). */
13008 if (arg
->attr
.intent
== INTENT_OUT
)
13010 gfc_error ("Argument of FINAL procedure at %L must not be"
13011 " INTENT(OUT)", &arg
->declared_at
);
13015 /* Warn if the procedure is non-scalar and not assumed shape. */
13016 if (warn_surprising
&& arg
->as
&& arg
->as
->rank
!= 0
13017 && arg
->as
->type
!= AS_ASSUMED_SHAPE
)
13018 gfc_warning (OPT_Wsurprising
,
13019 "Non-scalar FINAL procedure at %L should have assumed"
13020 " shape argument", &arg
->declared_at
);
13022 /* Check that it does not match in kind and rank with a FINAL procedure
13023 defined earlier. To really loop over the *earlier* declarations,
13024 we need to walk the tail of the list as new ones were pushed at the
13026 /* TODO: Handle kind parameters once they are implemented. */
13027 my_rank
= (arg
->as
? arg
->as
->rank
: 0);
13028 for (i
= list
->next
; i
; i
= i
->next
)
13030 gfc_formal_arglist
*dummy_args
;
13032 /* Argument list might be empty; that is an error signalled earlier,
13033 but we nevertheless continued resolving. */
13034 dummy_args
= gfc_sym_get_dummy_args (i
->proc_sym
);
13037 gfc_symbol
* i_arg
= dummy_args
->sym
;
13038 const int i_rank
= (i_arg
->as
? i_arg
->as
->rank
: 0);
13039 if (i_rank
== my_rank
)
13041 gfc_error ("FINAL procedure %qs declared at %L has the same"
13042 " rank (%d) as %qs",
13043 list
->proc_sym
->name
, &list
->where
, my_rank
,
13044 i
->proc_sym
->name
);
13050 /* Is this the/a scalar finalizer procedure? */
13052 seen_scalar
= true;
13054 /* Find the symtree for this procedure. */
13055 gcc_assert (!list
->proc_tree
);
13056 list
->proc_tree
= gfc_find_sym_in_symtree (list
->proc_sym
);
13058 prev_link
= &list
->next
;
13061 /* Remove wrong nodes immediately from the list so we don't risk any
13062 troubles in the future when they might fail later expectations. */
13065 *prev_link
= list
->next
;
13066 gfc_free_finalizer (i
);
13070 if (result
== false)
13073 /* Warn if we haven't seen a scalar finalizer procedure (but we know there
13074 were nodes in the list, must have been for arrays. It is surely a good
13075 idea to have a scalar version there if there's something to finalize. */
13076 if (warn_surprising
&& derived
->f2k_derived
->finalizers
&& !seen_scalar
)
13077 gfc_warning (OPT_Wsurprising
,
13078 "Only array FINAL procedures declared for derived type %qs"
13079 " defined at %L, suggest also scalar one",
13080 derived
->name
, &derived
->declared_at
);
13082 vtab
= gfc_find_derived_vtab (derived
);
13083 c
= vtab
->ts
.u
.derived
->components
->next
->next
->next
->next
->next
;
13084 gfc_set_sym_referenced (c
->initializer
->symtree
->n
.sym
);
13087 *finalizable
= true;
13093 /* Check if two GENERIC targets are ambiguous and emit an error is they are. */
13096 check_generic_tbp_ambiguity (gfc_tbp_generic
* t1
, gfc_tbp_generic
* t2
,
13097 const char* generic_name
, locus where
)
13099 gfc_symbol
*sym1
, *sym2
;
13100 const char *pass1
, *pass2
;
13101 gfc_formal_arglist
*dummy_args
;
13103 gcc_assert (t1
->specific
&& t2
->specific
);
13104 gcc_assert (!t1
->specific
->is_generic
);
13105 gcc_assert (!t2
->specific
->is_generic
);
13106 gcc_assert (t1
->is_operator
== t2
->is_operator
);
13108 sym1
= t1
->specific
->u
.specific
->n
.sym
;
13109 sym2
= t2
->specific
->u
.specific
->n
.sym
;
13114 /* Both must be SUBROUTINEs or both must be FUNCTIONs. */
13115 if (sym1
->attr
.subroutine
!= sym2
->attr
.subroutine
13116 || sym1
->attr
.function
!= sym2
->attr
.function
)
13118 gfc_error ("%qs and %qs cannot be mixed FUNCTION/SUBROUTINE for"
13119 " GENERIC %qs at %L",
13120 sym1
->name
, sym2
->name
, generic_name
, &where
);
13124 /* Determine PASS arguments. */
13125 if (t1
->specific
->nopass
)
13127 else if (t1
->specific
->pass_arg
)
13128 pass1
= t1
->specific
->pass_arg
;
13131 dummy_args
= gfc_sym_get_dummy_args (t1
->specific
->u
.specific
->n
.sym
);
13133 pass1
= dummy_args
->sym
->name
;
13137 if (t2
->specific
->nopass
)
13139 else if (t2
->specific
->pass_arg
)
13140 pass2
= t2
->specific
->pass_arg
;
13143 dummy_args
= gfc_sym_get_dummy_args (t2
->specific
->u
.specific
->n
.sym
);
13145 pass2
= dummy_args
->sym
->name
;
13150 /* Compare the interfaces. */
13151 if (gfc_compare_interfaces (sym1
, sym2
, sym2
->name
, !t1
->is_operator
, 0,
13152 NULL
, 0, pass1
, pass2
))
13154 gfc_error ("%qs and %qs for GENERIC %qs at %L are ambiguous",
13155 sym1
->name
, sym2
->name
, generic_name
, &where
);
13163 /* Worker function for resolving a generic procedure binding; this is used to
13164 resolve GENERIC as well as user and intrinsic OPERATOR typebound procedures.
13166 The difference between those cases is finding possible inherited bindings
13167 that are overridden, as one has to look for them in tb_sym_root,
13168 tb_uop_root or tb_op, respectively. Thus the caller must already find
13169 the super-type and set p->overridden correctly. */
13172 resolve_tb_generic_targets (gfc_symbol
* super_type
,
13173 gfc_typebound_proc
* p
, const char* name
)
13175 gfc_tbp_generic
* target
;
13176 gfc_symtree
* first_target
;
13177 gfc_symtree
* inherited
;
13179 gcc_assert (p
&& p
->is_generic
);
13181 /* Try to find the specific bindings for the symtrees in our target-list. */
13182 gcc_assert (p
->u
.generic
);
13183 for (target
= p
->u
.generic
; target
; target
= target
->next
)
13184 if (!target
->specific
)
13186 gfc_typebound_proc
* overridden_tbp
;
13187 gfc_tbp_generic
* g
;
13188 const char* target_name
;
13190 target_name
= target
->specific_st
->name
;
13192 /* Defined for this type directly. */
13193 if (target
->specific_st
->n
.tb
&& !target
->specific_st
->n
.tb
->error
)
13195 target
->specific
= target
->specific_st
->n
.tb
;
13196 goto specific_found
;
13199 /* Look for an inherited specific binding. */
13202 inherited
= gfc_find_typebound_proc (super_type
, NULL
, target_name
,
13207 gcc_assert (inherited
->n
.tb
);
13208 target
->specific
= inherited
->n
.tb
;
13209 goto specific_found
;
13213 gfc_error ("Undefined specific binding %qs as target of GENERIC %qs"
13214 " at %L", target_name
, name
, &p
->where
);
13217 /* Once we've found the specific binding, check it is not ambiguous with
13218 other specifics already found or inherited for the same GENERIC. */
13220 gcc_assert (target
->specific
);
13222 /* This must really be a specific binding! */
13223 if (target
->specific
->is_generic
)
13225 gfc_error ("GENERIC %qs at %L must target a specific binding,"
13226 " %qs is GENERIC, too", name
, &p
->where
, target_name
);
13230 /* Check those already resolved on this type directly. */
13231 for (g
= p
->u
.generic
; g
; g
= g
->next
)
13232 if (g
!= target
&& g
->specific
13233 && !check_generic_tbp_ambiguity (target
, g
, name
, p
->where
))
13236 /* Check for ambiguity with inherited specific targets. */
13237 for (overridden_tbp
= p
->overridden
; overridden_tbp
;
13238 overridden_tbp
= overridden_tbp
->overridden
)
13239 if (overridden_tbp
->is_generic
)
13241 for (g
= overridden_tbp
->u
.generic
; g
; g
= g
->next
)
13243 gcc_assert (g
->specific
);
13244 if (!check_generic_tbp_ambiguity (target
, g
, name
, p
->where
))
13250 /* If we attempt to "overwrite" a specific binding, this is an error. */
13251 if (p
->overridden
&& !p
->overridden
->is_generic
)
13253 gfc_error ("GENERIC %qs at %L cannot overwrite specific binding with"
13254 " the same name", name
, &p
->where
);
13258 /* Take the SUBROUTINE/FUNCTION attributes of the first specific target, as
13259 all must have the same attributes here. */
13260 first_target
= p
->u
.generic
->specific
->u
.specific
;
13261 gcc_assert (first_target
);
13262 p
->subroutine
= first_target
->n
.sym
->attr
.subroutine
;
13263 p
->function
= first_target
->n
.sym
->attr
.function
;
13269 /* Resolve a GENERIC procedure binding for a derived type. */
13272 resolve_typebound_generic (gfc_symbol
* derived
, gfc_symtree
* st
)
13274 gfc_symbol
* super_type
;
13276 /* Find the overridden binding if any. */
13277 st
->n
.tb
->overridden
= NULL
;
13278 super_type
= gfc_get_derived_super_type (derived
);
13281 gfc_symtree
* overridden
;
13282 overridden
= gfc_find_typebound_proc (super_type
, NULL
, st
->name
,
13285 if (overridden
&& overridden
->n
.tb
)
13286 st
->n
.tb
->overridden
= overridden
->n
.tb
;
13289 /* Resolve using worker function. */
13290 return resolve_tb_generic_targets (super_type
, st
->n
.tb
, st
->name
);
13294 /* Retrieve the target-procedure of an operator binding and do some checks in
13295 common for intrinsic and user-defined type-bound operators. */
13298 get_checked_tb_operator_target (gfc_tbp_generic
* target
, locus where
)
13300 gfc_symbol
* target_proc
;
13302 gcc_assert (target
->specific
&& !target
->specific
->is_generic
);
13303 target_proc
= target
->specific
->u
.specific
->n
.sym
;
13304 gcc_assert (target_proc
);
13306 /* F08:C468. All operator bindings must have a passed-object dummy argument. */
13307 if (target
->specific
->nopass
)
13309 gfc_error ("Type-bound operator at %L cannot be NOPASS", &where
);
13313 return target_proc
;
13317 /* Resolve a type-bound intrinsic operator. */
13320 resolve_typebound_intrinsic_op (gfc_symbol
* derived
, gfc_intrinsic_op op
,
13321 gfc_typebound_proc
* p
)
13323 gfc_symbol
* super_type
;
13324 gfc_tbp_generic
* target
;
13326 /* If there's already an error here, do nothing (but don't fail again). */
13330 /* Operators should always be GENERIC bindings. */
13331 gcc_assert (p
->is_generic
);
13333 /* Look for an overridden binding. */
13334 super_type
= gfc_get_derived_super_type (derived
);
13335 if (super_type
&& super_type
->f2k_derived
)
13336 p
->overridden
= gfc_find_typebound_intrinsic_op (super_type
, NULL
,
13339 p
->overridden
= NULL
;
13341 /* Resolve general GENERIC properties using worker function. */
13342 if (!resolve_tb_generic_targets (super_type
, p
, gfc_op2string(op
)))
13345 /* Check the targets to be procedures of correct interface. */
13346 for (target
= p
->u
.generic
; target
; target
= target
->next
)
13348 gfc_symbol
* target_proc
;
13350 target_proc
= get_checked_tb_operator_target (target
, p
->where
);
13354 if (!gfc_check_operator_interface (target_proc
, op
, p
->where
))
13357 /* Add target to non-typebound operator list. */
13358 if (!target
->specific
->deferred
&& !derived
->attr
.use_assoc
13359 && p
->access
!= ACCESS_PRIVATE
&& derived
->ns
== gfc_current_ns
)
13361 gfc_interface
*head
, *intr
;
13363 /* Preempt 'gfc_check_new_interface' for submodules, where the
13364 mechanism for handling module procedures winds up resolving
13365 operator interfaces twice and would otherwise cause an error. */
13366 for (intr
= derived
->ns
->op
[op
]; intr
; intr
= intr
->next
)
13367 if (intr
->sym
== target_proc
13368 && target_proc
->attr
.used_in_submodule
)
13371 if (!gfc_check_new_interface (derived
->ns
->op
[op
],
13372 target_proc
, p
->where
))
13374 head
= derived
->ns
->op
[op
];
13375 intr
= gfc_get_interface ();
13376 intr
->sym
= target_proc
;
13377 intr
->where
= p
->where
;
13379 derived
->ns
->op
[op
] = intr
;
13391 /* Resolve a type-bound user operator (tree-walker callback). */
13393 static gfc_symbol
* resolve_bindings_derived
;
13394 static bool resolve_bindings_result
;
13396 static bool check_uop_procedure (gfc_symbol
* sym
, locus where
);
13399 resolve_typebound_user_op (gfc_symtree
* stree
)
13401 gfc_symbol
* super_type
;
13402 gfc_tbp_generic
* target
;
13404 gcc_assert (stree
&& stree
->n
.tb
);
13406 if (stree
->n
.tb
->error
)
13409 /* Operators should always be GENERIC bindings. */
13410 gcc_assert (stree
->n
.tb
->is_generic
);
13412 /* Find overridden procedure, if any. */
13413 super_type
= gfc_get_derived_super_type (resolve_bindings_derived
);
13414 if (super_type
&& super_type
->f2k_derived
)
13416 gfc_symtree
* overridden
;
13417 overridden
= gfc_find_typebound_user_op (super_type
, NULL
,
13418 stree
->name
, true, NULL
);
13420 if (overridden
&& overridden
->n
.tb
)
13421 stree
->n
.tb
->overridden
= overridden
->n
.tb
;
13424 stree
->n
.tb
->overridden
= NULL
;
13426 /* Resolve basically using worker function. */
13427 if (!resolve_tb_generic_targets (super_type
, stree
->n
.tb
, stree
->name
))
13430 /* Check the targets to be functions of correct interface. */
13431 for (target
= stree
->n
.tb
->u
.generic
; target
; target
= target
->next
)
13433 gfc_symbol
* target_proc
;
13435 target_proc
= get_checked_tb_operator_target (target
, stree
->n
.tb
->where
);
13439 if (!check_uop_procedure (target_proc
, stree
->n
.tb
->where
))
13446 resolve_bindings_result
= false;
13447 stree
->n
.tb
->error
= 1;
13451 /* Resolve the type-bound procedures for a derived type. */
13454 resolve_typebound_procedure (gfc_symtree
* stree
)
13458 gfc_symbol
* me_arg
;
13459 gfc_symbol
* super_type
;
13460 gfc_component
* comp
;
13462 gcc_assert (stree
);
13464 /* Undefined specific symbol from GENERIC target definition. */
13468 if (stree
->n
.tb
->error
)
13471 /* If this is a GENERIC binding, use that routine. */
13472 if (stree
->n
.tb
->is_generic
)
13474 if (!resolve_typebound_generic (resolve_bindings_derived
, stree
))
13479 /* Get the target-procedure to check it. */
13480 gcc_assert (!stree
->n
.tb
->is_generic
);
13481 gcc_assert (stree
->n
.tb
->u
.specific
);
13482 proc
= stree
->n
.tb
->u
.specific
->n
.sym
;
13483 where
= stree
->n
.tb
->where
;
13485 /* Default access should already be resolved from the parser. */
13486 gcc_assert (stree
->n
.tb
->access
!= ACCESS_UNKNOWN
);
13488 if (stree
->n
.tb
->deferred
)
13490 if (!check_proc_interface (proc
, &where
))
13495 /* Check for F08:C465. */
13496 if ((!proc
->attr
.subroutine
&& !proc
->attr
.function
)
13497 || (proc
->attr
.proc
!= PROC_MODULE
13498 && proc
->attr
.if_source
!= IFSRC_IFBODY
)
13499 || proc
->attr
.abstract
)
13501 gfc_error ("%qs must be a module procedure or an external procedure with"
13502 " an explicit interface at %L", proc
->name
, &where
);
13507 stree
->n
.tb
->subroutine
= proc
->attr
.subroutine
;
13508 stree
->n
.tb
->function
= proc
->attr
.function
;
13510 /* Find the super-type of the current derived type. We could do this once and
13511 store in a global if speed is needed, but as long as not I believe this is
13512 more readable and clearer. */
13513 super_type
= gfc_get_derived_super_type (resolve_bindings_derived
);
13515 /* If PASS, resolve and check arguments if not already resolved / loaded
13516 from a .mod file. */
13517 if (!stree
->n
.tb
->nopass
&& stree
->n
.tb
->pass_arg_num
== 0)
13519 gfc_formal_arglist
*dummy_args
;
13521 dummy_args
= gfc_sym_get_dummy_args (proc
);
13522 if (stree
->n
.tb
->pass_arg
)
13524 gfc_formal_arglist
*i
;
13526 /* If an explicit passing argument name is given, walk the arg-list
13527 and look for it. */
13530 stree
->n
.tb
->pass_arg_num
= 1;
13531 for (i
= dummy_args
; i
; i
= i
->next
)
13533 if (!strcmp (i
->sym
->name
, stree
->n
.tb
->pass_arg
))
13538 ++stree
->n
.tb
->pass_arg_num
;
13543 gfc_error ("Procedure %qs with PASS(%s) at %L has no"
13545 proc
->name
, stree
->n
.tb
->pass_arg
, &where
,
13546 stree
->n
.tb
->pass_arg
);
13552 /* Otherwise, take the first one; there should in fact be at least
13554 stree
->n
.tb
->pass_arg_num
= 1;
13557 gfc_error ("Procedure %qs with PASS at %L must have at"
13558 " least one argument", proc
->name
, &where
);
13561 me_arg
= dummy_args
->sym
;
13564 /* Now check that the argument-type matches and the passed-object
13565 dummy argument is generally fine. */
13567 gcc_assert (me_arg
);
13569 if (me_arg
->ts
.type
!= BT_CLASS
)
13571 gfc_error ("Non-polymorphic passed-object dummy argument of %qs"
13572 " at %L", proc
->name
, &where
);
13576 if (CLASS_DATA (me_arg
)->ts
.u
.derived
13577 != resolve_bindings_derived
)
13579 gfc_error ("Argument %qs of %qs with PASS(%s) at %L must be of"
13580 " the derived-type %qs", me_arg
->name
, proc
->name
,
13581 me_arg
->name
, &where
, resolve_bindings_derived
->name
);
13585 gcc_assert (me_arg
->ts
.type
== BT_CLASS
);
13586 if (CLASS_DATA (me_arg
)->as
&& CLASS_DATA (me_arg
)->as
->rank
!= 0)
13588 gfc_error ("Passed-object dummy argument of %qs at %L must be"
13589 " scalar", proc
->name
, &where
);
13592 if (CLASS_DATA (me_arg
)->attr
.allocatable
)
13594 gfc_error ("Passed-object dummy argument of %qs at %L must not"
13595 " be ALLOCATABLE", proc
->name
, &where
);
13598 if (CLASS_DATA (me_arg
)->attr
.class_pointer
)
13600 gfc_error ("Passed-object dummy argument of %qs at %L must not"
13601 " be POINTER", proc
->name
, &where
);
13606 /* If we are extending some type, check that we don't override a procedure
13607 flagged NON_OVERRIDABLE. */
13608 stree
->n
.tb
->overridden
= NULL
;
13611 gfc_symtree
* overridden
;
13612 overridden
= gfc_find_typebound_proc (super_type
, NULL
,
13613 stree
->name
, true, NULL
);
13617 if (overridden
->n
.tb
)
13618 stree
->n
.tb
->overridden
= overridden
->n
.tb
;
13620 if (!gfc_check_typebound_override (stree
, overridden
))
13625 /* See if there's a name collision with a component directly in this type. */
13626 for (comp
= resolve_bindings_derived
->components
; comp
; comp
= comp
->next
)
13627 if (!strcmp (comp
->name
, stree
->name
))
13629 gfc_error ("Procedure %qs at %L has the same name as a component of"
13631 stree
->name
, &where
, resolve_bindings_derived
->name
);
13635 /* Try to find a name collision with an inherited component. */
13636 if (super_type
&& gfc_find_component (super_type
, stree
->name
, true, true,
13639 gfc_error ("Procedure %qs at %L has the same name as an inherited"
13640 " component of %qs",
13641 stree
->name
, &where
, resolve_bindings_derived
->name
);
13645 stree
->n
.tb
->error
= 0;
13649 resolve_bindings_result
= false;
13650 stree
->n
.tb
->error
= 1;
13655 resolve_typebound_procedures (gfc_symbol
* derived
)
13658 gfc_symbol
* super_type
;
13660 if (!derived
->f2k_derived
|| !derived
->f2k_derived
->tb_sym_root
)
13663 super_type
= gfc_get_derived_super_type (derived
);
13665 resolve_symbol (super_type
);
13667 resolve_bindings_derived
= derived
;
13668 resolve_bindings_result
= true;
13670 if (derived
->f2k_derived
->tb_sym_root
)
13671 gfc_traverse_symtree (derived
->f2k_derived
->tb_sym_root
,
13672 &resolve_typebound_procedure
);
13674 if (derived
->f2k_derived
->tb_uop_root
)
13675 gfc_traverse_symtree (derived
->f2k_derived
->tb_uop_root
,
13676 &resolve_typebound_user_op
);
13678 for (op
= 0; op
!= GFC_INTRINSIC_OPS
; ++op
)
13680 gfc_typebound_proc
* p
= derived
->f2k_derived
->tb_op
[op
];
13681 if (p
&& !resolve_typebound_intrinsic_op (derived
,
13682 (gfc_intrinsic_op
)op
, p
))
13683 resolve_bindings_result
= false;
13686 return resolve_bindings_result
;
13690 /* Add a derived type to the dt_list. The dt_list is used in trans-types.c
13691 to give all identical derived types the same backend_decl. */
13693 add_dt_to_dt_list (gfc_symbol
*derived
)
13695 if (!derived
->dt_next
)
13697 if (gfc_derived_types
)
13699 derived
->dt_next
= gfc_derived_types
->dt_next
;
13700 gfc_derived_types
->dt_next
= derived
;
13704 derived
->dt_next
= derived
;
13706 gfc_derived_types
= derived
;
13711 /* Ensure that a derived-type is really not abstract, meaning that every
13712 inherited DEFERRED binding is overridden by a non-DEFERRED one. */
13715 ensure_not_abstract_walker (gfc_symbol
* sub
, gfc_symtree
* st
)
13720 if (!ensure_not_abstract_walker (sub
, st
->left
))
13722 if (!ensure_not_abstract_walker (sub
, st
->right
))
13725 if (st
->n
.tb
&& st
->n
.tb
->deferred
)
13727 gfc_symtree
* overriding
;
13728 overriding
= gfc_find_typebound_proc (sub
, NULL
, st
->name
, true, NULL
);
13731 gcc_assert (overriding
->n
.tb
);
13732 if (overriding
->n
.tb
->deferred
)
13734 gfc_error ("Derived-type %qs declared at %L must be ABSTRACT because"
13735 " %qs is DEFERRED and not overridden",
13736 sub
->name
, &sub
->declared_at
, st
->name
);
13745 ensure_not_abstract (gfc_symbol
* sub
, gfc_symbol
* ancestor
)
13747 /* The algorithm used here is to recursively travel up the ancestry of sub
13748 and for each ancestor-type, check all bindings. If any of them is
13749 DEFERRED, look it up starting from sub and see if the found (overriding)
13750 binding is not DEFERRED.
13751 This is not the most efficient way to do this, but it should be ok and is
13752 clearer than something sophisticated. */
13754 gcc_assert (ancestor
&& !sub
->attr
.abstract
);
13756 if (!ancestor
->attr
.abstract
)
13759 /* Walk bindings of this ancestor. */
13760 if (ancestor
->f2k_derived
)
13763 t
= ensure_not_abstract_walker (sub
, ancestor
->f2k_derived
->tb_sym_root
);
13768 /* Find next ancestor type and recurse on it. */
13769 ancestor
= gfc_get_derived_super_type (ancestor
);
13771 return ensure_not_abstract (sub
, ancestor
);
13777 /* This check for typebound defined assignments is done recursively
13778 since the order in which derived types are resolved is not always in
13779 order of the declarations. */
13782 check_defined_assignments (gfc_symbol
*derived
)
13786 for (c
= derived
->components
; c
; c
= c
->next
)
13788 if (!gfc_bt_struct (c
->ts
.type
)
13790 || c
->attr
.allocatable
13791 || c
->attr
.proc_pointer_comp
13792 || c
->attr
.class_pointer
13793 || c
->attr
.proc_pointer
)
13796 if (c
->ts
.u
.derived
->attr
.defined_assign_comp
13797 || (c
->ts
.u
.derived
->f2k_derived
13798 && c
->ts
.u
.derived
->f2k_derived
->tb_op
[INTRINSIC_ASSIGN
]))
13800 derived
->attr
.defined_assign_comp
= 1;
13804 check_defined_assignments (c
->ts
.u
.derived
);
13805 if (c
->ts
.u
.derived
->attr
.defined_assign_comp
)
13807 derived
->attr
.defined_assign_comp
= 1;
13814 /* Resolve a single component of a derived type or structure. */
13817 resolve_component (gfc_component
*c
, gfc_symbol
*sym
)
13819 gfc_symbol
*super_type
;
13820 symbol_attribute
*attr
;
13822 if (c
->attr
.artificial
)
13825 /* Do not allow vtype components to be resolved in nameless namespaces
13826 such as block data because the procedure pointers will cause ICEs
13827 and vtables are not needed in these contexts. */
13828 if (sym
->attr
.vtype
&& sym
->attr
.use_assoc
13829 && sym
->ns
->proc_name
== NULL
)
13833 if ((!sym
->attr
.is_class
|| c
!= sym
->components
)
13834 && c
->attr
.codimension
13835 && (!c
->attr
.allocatable
|| (c
->as
&& c
->as
->type
!= AS_DEFERRED
)))
13837 gfc_error ("Coarray component %qs at %L must be allocatable with "
13838 "deferred shape", c
->name
, &c
->loc
);
13843 if (c
->attr
.codimension
&& c
->ts
.type
== BT_DERIVED
13844 && c
->ts
.u
.derived
->ts
.is_iso_c
)
13846 gfc_error ("Component %qs at %L of TYPE(C_PTR) or TYPE(C_FUNPTR) "
13847 "shall not be a coarray", c
->name
, &c
->loc
);
13852 if (gfc_bt_struct (c
->ts
.type
) && c
->ts
.u
.derived
->attr
.coarray_comp
13853 && (c
->attr
.codimension
|| c
->attr
.pointer
|| c
->attr
.dimension
13854 || c
->attr
.allocatable
))
13856 gfc_error ("Component %qs at %L with coarray component "
13857 "shall be a nonpointer, nonallocatable scalar",
13863 if (c
->ts
.type
== BT_CLASS
)
13865 if (CLASS_DATA (c
))
13867 attr
= &(CLASS_DATA (c
)->attr
);
13869 /* Fix up contiguous attribute. */
13870 if (c
->attr
.contiguous
)
13871 attr
->contiguous
= 1;
13879 if (attr
&& attr
->contiguous
&& (!attr
->dimension
|| !attr
->pointer
))
13881 gfc_error ("Component %qs at %L has the CONTIGUOUS attribute but "
13882 "is not an array pointer", c
->name
, &c
->loc
);
13886 /* F2003, 15.2.1 - length has to be one. */
13887 if (sym
->attr
.is_bind_c
&& c
->ts
.type
== BT_CHARACTER
13888 && (c
->ts
.u
.cl
== NULL
|| c
->ts
.u
.cl
->length
== NULL
13889 || !gfc_is_constant_expr (c
->ts
.u
.cl
->length
)
13890 || mpz_cmp_si (c
->ts
.u
.cl
->length
->value
.integer
, 1) != 0))
13892 gfc_error ("Component %qs of BIND(C) type at %L must have length one",
13897 if (c
->attr
.proc_pointer
&& c
->ts
.interface
)
13899 gfc_symbol
*ifc
= c
->ts
.interface
;
13901 if (!sym
->attr
.vtype
&& !check_proc_interface (ifc
, &c
->loc
))
13907 if (ifc
->attr
.if_source
|| ifc
->attr
.intrinsic
)
13909 /* Resolve interface and copy attributes. */
13910 if (ifc
->formal
&& !ifc
->formal_ns
)
13911 resolve_symbol (ifc
);
13912 if (ifc
->attr
.intrinsic
)
13913 gfc_resolve_intrinsic (ifc
, &ifc
->declared_at
);
13917 c
->ts
= ifc
->result
->ts
;
13918 c
->attr
.allocatable
= ifc
->result
->attr
.allocatable
;
13919 c
->attr
.pointer
= ifc
->result
->attr
.pointer
;
13920 c
->attr
.dimension
= ifc
->result
->attr
.dimension
;
13921 c
->as
= gfc_copy_array_spec (ifc
->result
->as
);
13922 c
->attr
.class_ok
= ifc
->result
->attr
.class_ok
;
13927 c
->attr
.allocatable
= ifc
->attr
.allocatable
;
13928 c
->attr
.pointer
= ifc
->attr
.pointer
;
13929 c
->attr
.dimension
= ifc
->attr
.dimension
;
13930 c
->as
= gfc_copy_array_spec (ifc
->as
);
13931 c
->attr
.class_ok
= ifc
->attr
.class_ok
;
13933 c
->ts
.interface
= ifc
;
13934 c
->attr
.function
= ifc
->attr
.function
;
13935 c
->attr
.subroutine
= ifc
->attr
.subroutine
;
13937 c
->attr
.pure
= ifc
->attr
.pure
;
13938 c
->attr
.elemental
= ifc
->attr
.elemental
;
13939 c
->attr
.recursive
= ifc
->attr
.recursive
;
13940 c
->attr
.always_explicit
= ifc
->attr
.always_explicit
;
13941 c
->attr
.ext_attr
|= ifc
->attr
.ext_attr
;
13942 /* Copy char length. */
13943 if (ifc
->ts
.type
== BT_CHARACTER
&& ifc
->ts
.u
.cl
)
13945 gfc_charlen
*cl
= gfc_new_charlen (sym
->ns
, ifc
->ts
.u
.cl
);
13946 if (cl
->length
&& !cl
->resolved
13947 && !gfc_resolve_expr (cl
->length
))
13956 else if (c
->attr
.proc_pointer
&& c
->ts
.type
== BT_UNKNOWN
)
13958 /* Since PPCs are not implicitly typed, a PPC without an explicit
13959 interface must be a subroutine. */
13960 gfc_add_subroutine (&c
->attr
, c
->name
, &c
->loc
);
13963 /* Procedure pointer components: Check PASS arg. */
13964 if (c
->attr
.proc_pointer
&& !c
->tb
->nopass
&& c
->tb
->pass_arg_num
== 0
13965 && !sym
->attr
.vtype
)
13967 gfc_symbol
* me_arg
;
13969 if (c
->tb
->pass_arg
)
13971 gfc_formal_arglist
* i
;
13973 /* If an explicit passing argument name is given, walk the arg-list
13974 and look for it. */
13977 c
->tb
->pass_arg_num
= 1;
13978 for (i
= c
->ts
.interface
->formal
; i
; i
= i
->next
)
13980 if (!strcmp (i
->sym
->name
, c
->tb
->pass_arg
))
13985 c
->tb
->pass_arg_num
++;
13990 gfc_error ("Procedure pointer component %qs with PASS(%s) "
13991 "at %L has no argument %qs", c
->name
,
13992 c
->tb
->pass_arg
, &c
->loc
, c
->tb
->pass_arg
);
13999 /* Otherwise, take the first one; there should in fact be at least
14001 c
->tb
->pass_arg_num
= 1;
14002 if (!c
->ts
.interface
->formal
)
14004 gfc_error ("Procedure pointer component %qs with PASS at %L "
14005 "must have at least one argument",
14010 me_arg
= c
->ts
.interface
->formal
->sym
;
14013 /* Now check that the argument-type matches. */
14014 gcc_assert (me_arg
);
14015 if ((me_arg
->ts
.type
!= BT_DERIVED
&& me_arg
->ts
.type
!= BT_CLASS
)
14016 || (me_arg
->ts
.type
== BT_DERIVED
&& me_arg
->ts
.u
.derived
!= sym
)
14017 || (me_arg
->ts
.type
== BT_CLASS
14018 && CLASS_DATA (me_arg
)->ts
.u
.derived
!= sym
))
14020 gfc_error ("Argument %qs of %qs with PASS(%s) at %L must be of"
14021 " the derived type %qs", me_arg
->name
, c
->name
,
14022 me_arg
->name
, &c
->loc
, sym
->name
);
14027 /* Check for F03:C453. */
14028 if (CLASS_DATA (me_arg
)->attr
.dimension
)
14030 gfc_error ("Argument %qs of %qs with PASS(%s) at %L "
14031 "must be scalar", me_arg
->name
, c
->name
, me_arg
->name
,
14037 if (CLASS_DATA (me_arg
)->attr
.class_pointer
)
14039 gfc_error ("Argument %qs of %qs with PASS(%s) at %L "
14040 "may not have the POINTER attribute", me_arg
->name
,
14041 c
->name
, me_arg
->name
, &c
->loc
);
14046 if (CLASS_DATA (me_arg
)->attr
.allocatable
)
14048 gfc_error ("Argument %qs of %qs with PASS(%s) at %L "
14049 "may not be ALLOCATABLE", me_arg
->name
, c
->name
,
14050 me_arg
->name
, &c
->loc
);
14055 if (gfc_type_is_extensible (sym
) && me_arg
->ts
.type
!= BT_CLASS
)
14057 gfc_error ("Non-polymorphic passed-object dummy argument of %qs"
14058 " at %L", c
->name
, &c
->loc
);
14064 /* Check type-spec if this is not the parent-type component. */
14065 if (((sym
->attr
.is_class
14066 && (!sym
->components
->ts
.u
.derived
->attr
.extension
14067 || c
!= sym
->components
->ts
.u
.derived
->components
))
14068 || (!sym
->attr
.is_class
14069 && (!sym
->attr
.extension
|| c
!= sym
->components
)))
14070 && !sym
->attr
.vtype
14071 && !resolve_typespec_used (&c
->ts
, &c
->loc
, c
->name
))
14074 super_type
= gfc_get_derived_super_type (sym
);
14076 /* If this type is an extension, set the accessibility of the parent
14079 && ((sym
->attr
.is_class
14080 && c
== sym
->components
->ts
.u
.derived
->components
)
14081 || (!sym
->attr
.is_class
&& c
== sym
->components
))
14082 && strcmp (super_type
->name
, c
->name
) == 0)
14083 c
->attr
.access
= super_type
->attr
.access
;
14085 /* If this type is an extension, see if this component has the same name
14086 as an inherited type-bound procedure. */
14087 if (super_type
&& !sym
->attr
.is_class
14088 && gfc_find_typebound_proc (super_type
, NULL
, c
->name
, true, NULL
))
14090 gfc_error ("Component %qs of %qs at %L has the same name as an"
14091 " inherited type-bound procedure",
14092 c
->name
, sym
->name
, &c
->loc
);
14096 if (c
->ts
.type
== BT_CHARACTER
&& !c
->attr
.proc_pointer
14097 && !c
->ts
.deferred
)
14099 if (c
->ts
.u
.cl
->length
== NULL
14100 || (!resolve_charlen(c
->ts
.u
.cl
))
14101 || !gfc_is_constant_expr (c
->ts
.u
.cl
->length
))
14103 gfc_error ("Character length of component %qs needs to "
14104 "be a constant specification expression at %L",
14106 c
->ts
.u
.cl
->length
? &c
->ts
.u
.cl
->length
->where
: &c
->loc
);
14111 if (c
->ts
.type
== BT_CHARACTER
&& c
->ts
.deferred
14112 && !c
->attr
.pointer
&& !c
->attr
.allocatable
)
14114 gfc_error ("Character component %qs of %qs at %L with deferred "
14115 "length must be a POINTER or ALLOCATABLE",
14116 c
->name
, sym
->name
, &c
->loc
);
14120 /* Add the hidden deferred length field. */
14121 if (c
->ts
.type
== BT_CHARACTER
14122 && (c
->ts
.deferred
|| c
->attr
.pdt_string
)
14123 && !c
->attr
.function
14124 && !sym
->attr
.is_class
)
14126 char name
[GFC_MAX_SYMBOL_LEN
+9];
14127 gfc_component
*strlen
;
14128 sprintf (name
, "_%s_length", c
->name
);
14129 strlen
= gfc_find_component (sym
, name
, true, true, NULL
);
14130 if (strlen
== NULL
)
14132 if (!gfc_add_component (sym
, name
, &strlen
))
14134 strlen
->ts
.type
= BT_INTEGER
;
14135 strlen
->ts
.kind
= gfc_charlen_int_kind
;
14136 strlen
->attr
.access
= ACCESS_PRIVATE
;
14137 strlen
->attr
.artificial
= 1;
14141 if (c
->ts
.type
== BT_DERIVED
14142 && sym
->component_access
!= ACCESS_PRIVATE
14143 && gfc_check_symbol_access (sym
)
14144 && !is_sym_host_assoc (c
->ts
.u
.derived
, sym
->ns
)
14145 && !c
->ts
.u
.derived
->attr
.use_assoc
14146 && !gfc_check_symbol_access (c
->ts
.u
.derived
)
14147 && !gfc_notify_std (GFC_STD_F2003
, "the component %qs is a "
14148 "PRIVATE type and cannot be a component of "
14149 "%qs, which is PUBLIC at %L", c
->name
,
14150 sym
->name
, &sym
->declared_at
))
14153 if ((sym
->attr
.sequence
|| sym
->attr
.is_bind_c
) && c
->ts
.type
== BT_CLASS
)
14155 gfc_error ("Polymorphic component %s at %L in SEQUENCE or BIND(C) "
14156 "type %s", c
->name
, &c
->loc
, sym
->name
);
14160 if (sym
->attr
.sequence
)
14162 if (c
->ts
.type
== BT_DERIVED
&& c
->ts
.u
.derived
->attr
.sequence
== 0)
14164 gfc_error ("Component %s of SEQUENCE type declared at %L does "
14165 "not have the SEQUENCE attribute",
14166 c
->ts
.u
.derived
->name
, &sym
->declared_at
);
14171 if (c
->ts
.type
== BT_DERIVED
&& c
->ts
.u
.derived
->attr
.generic
)
14172 c
->ts
.u
.derived
= gfc_find_dt_in_generic (c
->ts
.u
.derived
);
14173 else if (c
->ts
.type
== BT_CLASS
&& c
->attr
.class_ok
14174 && CLASS_DATA (c
)->ts
.u
.derived
->attr
.generic
)
14175 CLASS_DATA (c
)->ts
.u
.derived
14176 = gfc_find_dt_in_generic (CLASS_DATA (c
)->ts
.u
.derived
);
14178 /* If an allocatable component derived type is of the same type as
14179 the enclosing derived type, we need a vtable generating so that
14180 the __deallocate procedure is created. */
14181 if ((c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
14182 && c
->ts
.u
.derived
== sym
&& c
->attr
.allocatable
== 1)
14183 gfc_find_vtab (&c
->ts
);
14185 /* Ensure that all the derived type components are put on the
14186 derived type list; even in formal namespaces, where derived type
14187 pointer components might not have been declared. */
14188 if (c
->ts
.type
== BT_DERIVED
14190 && c
->ts
.u
.derived
->components
14192 && sym
!= c
->ts
.u
.derived
)
14193 add_dt_to_dt_list (c
->ts
.u
.derived
);
14195 if (!gfc_resolve_array_spec (c
->as
,
14196 !(c
->attr
.pointer
|| c
->attr
.proc_pointer
14197 || c
->attr
.allocatable
)))
14200 if (c
->initializer
&& !sym
->attr
.vtype
14201 && !c
->attr
.pdt_kind
&& !c
->attr
.pdt_len
14202 && !gfc_check_assign_symbol (sym
, c
, c
->initializer
))
14209 /* Be nice about the locus for a structure expression - show the locus of the
14210 first non-null sub-expression if we can. */
14213 cons_where (gfc_expr
*struct_expr
)
14215 gfc_constructor
*cons
;
14217 gcc_assert (struct_expr
&& struct_expr
->expr_type
== EXPR_STRUCTURE
);
14219 cons
= gfc_constructor_first (struct_expr
->value
.constructor
);
14220 for (; cons
; cons
= gfc_constructor_next (cons
))
14222 if (cons
->expr
&& cons
->expr
->expr_type
!= EXPR_NULL
)
14223 return &cons
->expr
->where
;
14226 return &struct_expr
->where
;
14229 /* Resolve the components of a structure type. Much less work than derived
14233 resolve_fl_struct (gfc_symbol
*sym
)
14236 gfc_expr
*init
= NULL
;
14239 /* Make sure UNIONs do not have overlapping initializers. */
14240 if (sym
->attr
.flavor
== FL_UNION
)
14242 for (c
= sym
->components
; c
; c
= c
->next
)
14244 if (init
&& c
->initializer
)
14246 gfc_error ("Conflicting initializers in union at %L and %L",
14247 cons_where (init
), cons_where (c
->initializer
));
14248 gfc_free_expr (c
->initializer
);
14249 c
->initializer
= NULL
;
14252 init
= c
->initializer
;
14257 for (c
= sym
->components
; c
; c
= c
->next
)
14258 if (!resolve_component (c
, sym
))
14264 if (sym
->components
)
14265 add_dt_to_dt_list (sym
);
14271 /* Resolve the components of a derived type. This does not have to wait until
14272 resolution stage, but can be done as soon as the dt declaration has been
14276 resolve_fl_derived0 (gfc_symbol
*sym
)
14278 gfc_symbol
* super_type
;
14280 gfc_formal_arglist
*f
;
14283 if (sym
->attr
.unlimited_polymorphic
)
14286 super_type
= gfc_get_derived_super_type (sym
);
14289 if (super_type
&& sym
->attr
.coarray_comp
&& !super_type
->attr
.coarray_comp
)
14291 gfc_error ("As extending type %qs at %L has a coarray component, "
14292 "parent type %qs shall also have one", sym
->name
,
14293 &sym
->declared_at
, super_type
->name
);
14297 /* Ensure the extended type gets resolved before we do. */
14298 if (super_type
&& !resolve_fl_derived0 (super_type
))
14301 /* An ABSTRACT type must be extensible. */
14302 if (sym
->attr
.abstract
&& !gfc_type_is_extensible (sym
))
14304 gfc_error ("Non-extensible derived-type %qs at %L must not be ABSTRACT",
14305 sym
->name
, &sym
->declared_at
);
14309 c
= (sym
->attr
.is_class
) ? sym
->components
->ts
.u
.derived
->components
14313 for ( ; c
!= NULL
; c
= c
->next
)
14314 if (!resolve_component (c
, sym
))
14320 /* Now add the caf token field, where needed. */
14321 if (flag_coarray
!= GFC_FCOARRAY_NONE
14322 && !sym
->attr
.is_class
&& !sym
->attr
.vtype
)
14324 for (c
= sym
->components
; c
; c
= c
->next
)
14325 if (!c
->attr
.dimension
&& !c
->attr
.codimension
14326 && (c
->attr
.allocatable
|| c
->attr
.pointer
))
14328 char name
[GFC_MAX_SYMBOL_LEN
+9];
14329 gfc_component
*token
;
14330 sprintf (name
, "_caf_%s", c
->name
);
14331 token
= gfc_find_component (sym
, name
, true, true, NULL
);
14334 if (!gfc_add_component (sym
, name
, &token
))
14336 token
->ts
.type
= BT_VOID
;
14337 token
->ts
.kind
= gfc_default_integer_kind
;
14338 token
->attr
.access
= ACCESS_PRIVATE
;
14339 token
->attr
.artificial
= 1;
14340 token
->attr
.caf_token
= 1;
14345 check_defined_assignments (sym
);
14347 if (!sym
->attr
.defined_assign_comp
&& super_type
)
14348 sym
->attr
.defined_assign_comp
14349 = super_type
->attr
.defined_assign_comp
;
14351 /* If this is a non-ABSTRACT type extending an ABSTRACT one, ensure that
14352 all DEFERRED bindings are overridden. */
14353 if (super_type
&& super_type
->attr
.abstract
&& !sym
->attr
.abstract
14354 && !sym
->attr
.is_class
14355 && !ensure_not_abstract (sym
, super_type
))
14358 /* Check that there is a component for every PDT parameter. */
14359 if (sym
->attr
.pdt_template
)
14361 for (f
= sym
->formal
; f
; f
= f
->next
)
14365 c
= gfc_find_component (sym
, f
->sym
->name
, true, true, NULL
);
14368 gfc_error ("Parameterized type %qs does not have a component "
14369 "corresponding to parameter %qs at %L", sym
->name
,
14370 f
->sym
->name
, &sym
->declared_at
);
14376 /* Add derived type to the derived type list. */
14377 add_dt_to_dt_list (sym
);
14383 /* The following procedure does the full resolution of a derived type,
14384 including resolution of all type-bound procedures (if present). In contrast
14385 to 'resolve_fl_derived0' this can only be done after the module has been
14386 parsed completely. */
14389 resolve_fl_derived (gfc_symbol
*sym
)
14391 gfc_symbol
*gen_dt
= NULL
;
14393 if (sym
->attr
.unlimited_polymorphic
)
14396 if (!sym
->attr
.is_class
)
14397 gfc_find_symbol (sym
->name
, sym
->ns
, 0, &gen_dt
);
14398 if (gen_dt
&& gen_dt
->generic
&& gen_dt
->generic
->next
14399 && (!gen_dt
->generic
->sym
->attr
.use_assoc
14400 || gen_dt
->generic
->sym
->module
!= gen_dt
->generic
->next
->sym
->module
)
14401 && !gfc_notify_std (GFC_STD_F2003
, "Generic name %qs of function "
14402 "%qs at %L being the same name as derived "
14403 "type at %L", sym
->name
,
14404 gen_dt
->generic
->sym
== sym
14405 ? gen_dt
->generic
->next
->sym
->name
14406 : gen_dt
->generic
->sym
->name
,
14407 gen_dt
->generic
->sym
== sym
14408 ? &gen_dt
->generic
->next
->sym
->declared_at
14409 : &gen_dt
->generic
->sym
->declared_at
,
14410 &sym
->declared_at
))
14413 if (sym
->components
== NULL
&& !sym
->attr
.zero_comp
&& !sym
->attr
.use_assoc
)
14415 gfc_error ("Derived type %qs at %L has not been declared",
14416 sym
->name
, &sym
->declared_at
);
14420 /* Resolve the finalizer procedures. */
14421 if (!gfc_resolve_finalizers (sym
, NULL
))
14424 if (sym
->attr
.is_class
&& sym
->ts
.u
.derived
== NULL
)
14426 /* Fix up incomplete CLASS symbols. */
14427 gfc_component
*data
= gfc_find_component (sym
, "_data", true, true, NULL
);
14428 gfc_component
*vptr
= gfc_find_component (sym
, "_vptr", true, true, NULL
);
14430 /* Nothing more to do for unlimited polymorphic entities. */
14431 if (data
->ts
.u
.derived
->attr
.unlimited_polymorphic
)
14433 else if (vptr
->ts
.u
.derived
== NULL
)
14435 gfc_symbol
*vtab
= gfc_find_derived_vtab (data
->ts
.u
.derived
);
14437 vptr
->ts
.u
.derived
= vtab
->ts
.u
.derived
;
14438 if (!resolve_fl_derived0 (vptr
->ts
.u
.derived
))
14443 if (!resolve_fl_derived0 (sym
))
14446 /* Resolve the type-bound procedures. */
14447 if (!resolve_typebound_procedures (sym
))
14450 /* Generate module vtables subject to their accessibility and their not
14451 being vtables or pdt templates. If this is not done class declarations
14452 in external procedures wind up with their own version and so SELECT TYPE
14453 fails because the vptrs do not have the same address. */
14454 if (gfc_option
.allow_std
& GFC_STD_F2003
14455 && sym
->ns
->proc_name
14456 && sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
14457 && sym
->attr
.access
!= ACCESS_PRIVATE
14458 && !(sym
->attr
.use_assoc
|| sym
->attr
.vtype
|| sym
->attr
.pdt_template
))
14460 gfc_symbol
*vtab
= gfc_find_derived_vtab (sym
);
14461 gfc_set_sym_referenced (vtab
);
14469 resolve_fl_namelist (gfc_symbol
*sym
)
14474 for (nl
= sym
->namelist
; nl
; nl
= nl
->next
)
14476 /* Check again, the check in match only works if NAMELIST comes
14478 if (nl
->sym
->as
&& nl
->sym
->as
->type
== AS_ASSUMED_SIZE
)
14480 gfc_error ("Assumed size array %qs in namelist %qs at %L is not "
14481 "allowed", nl
->sym
->name
, sym
->name
, &sym
->declared_at
);
14485 if (nl
->sym
->as
&& nl
->sym
->as
->type
== AS_ASSUMED_SHAPE
14486 && !gfc_notify_std (GFC_STD_F2003
, "NAMELIST array object %qs "
14487 "with assumed shape in namelist %qs at %L",
14488 nl
->sym
->name
, sym
->name
, &sym
->declared_at
))
14491 if (is_non_constant_shape_array (nl
->sym
)
14492 && !gfc_notify_std (GFC_STD_F2003
, "NAMELIST array object %qs "
14493 "with nonconstant shape in namelist %qs at %L",
14494 nl
->sym
->name
, sym
->name
, &sym
->declared_at
))
14497 if (nl
->sym
->ts
.type
== BT_CHARACTER
14498 && (nl
->sym
->ts
.u
.cl
->length
== NULL
14499 || !gfc_is_constant_expr (nl
->sym
->ts
.u
.cl
->length
))
14500 && !gfc_notify_std (GFC_STD_F2003
, "NAMELIST object %qs with "
14501 "nonconstant character length in "
14502 "namelist %qs at %L", nl
->sym
->name
,
14503 sym
->name
, &sym
->declared_at
))
14508 /* Reject PRIVATE objects in a PUBLIC namelist. */
14509 if (gfc_check_symbol_access (sym
))
14511 for (nl
= sym
->namelist
; nl
; nl
= nl
->next
)
14513 if (!nl
->sym
->attr
.use_assoc
14514 && !is_sym_host_assoc (nl
->sym
, sym
->ns
)
14515 && !gfc_check_symbol_access (nl
->sym
))
14517 gfc_error ("NAMELIST object %qs was declared PRIVATE and "
14518 "cannot be member of PUBLIC namelist %qs at %L",
14519 nl
->sym
->name
, sym
->name
, &sym
->declared_at
);
14523 if (nl
->sym
->ts
.type
== BT_DERIVED
14524 && (nl
->sym
->ts
.u
.derived
->attr
.alloc_comp
14525 || nl
->sym
->ts
.u
.derived
->attr
.pointer_comp
))
14527 if (!gfc_notify_std (GFC_STD_F2003
, "NAMELIST object %qs in "
14528 "namelist %qs at %L with ALLOCATABLE "
14529 "or POINTER components", nl
->sym
->name
,
14530 sym
->name
, &sym
->declared_at
))
14535 /* Types with private components that came here by USE-association. */
14536 if (nl
->sym
->ts
.type
== BT_DERIVED
14537 && derived_inaccessible (nl
->sym
->ts
.u
.derived
))
14539 gfc_error ("NAMELIST object %qs has use-associated PRIVATE "
14540 "components and cannot be member of namelist %qs at %L",
14541 nl
->sym
->name
, sym
->name
, &sym
->declared_at
);
14545 /* Types with private components that are defined in the same module. */
14546 if (nl
->sym
->ts
.type
== BT_DERIVED
14547 && !is_sym_host_assoc (nl
->sym
->ts
.u
.derived
, sym
->ns
)
14548 && nl
->sym
->ts
.u
.derived
->attr
.private_comp
)
14550 gfc_error ("NAMELIST object %qs has PRIVATE components and "
14551 "cannot be a member of PUBLIC namelist %qs at %L",
14552 nl
->sym
->name
, sym
->name
, &sym
->declared_at
);
14559 /* 14.1.2 A module or internal procedure represent local entities
14560 of the same type as a namelist member and so are not allowed. */
14561 for (nl
= sym
->namelist
; nl
; nl
= nl
->next
)
14563 if (nl
->sym
->ts
.kind
!= 0 && nl
->sym
->attr
.flavor
== FL_VARIABLE
)
14566 if (nl
->sym
->attr
.function
&& nl
->sym
== nl
->sym
->result
)
14567 if ((nl
->sym
== sym
->ns
->proc_name
)
14569 (sym
->ns
->parent
&& nl
->sym
== sym
->ns
->parent
->proc_name
))
14574 gfc_find_symbol (nl
->sym
->name
, sym
->ns
, 1, &nlsym
);
14575 if (nlsym
&& nlsym
->attr
.flavor
== FL_PROCEDURE
)
14577 gfc_error ("PROCEDURE attribute conflicts with NAMELIST "
14578 "attribute in %qs at %L", nlsym
->name
,
14579 &sym
->declared_at
);
14586 for (nl
= sym
->namelist
; nl
; nl
= nl
->next
)
14587 nl
->sym
->attr
.asynchronous
= 1;
14594 resolve_fl_parameter (gfc_symbol
*sym
)
14596 /* A parameter array's shape needs to be constant. */
14597 if (sym
->as
!= NULL
14598 && (sym
->as
->type
== AS_DEFERRED
14599 || is_non_constant_shape_array (sym
)))
14601 gfc_error ("Parameter array %qs at %L cannot be automatic "
14602 "or of deferred shape", sym
->name
, &sym
->declared_at
);
14606 /* Constraints on deferred type parameter. */
14607 if (!deferred_requirements (sym
))
14610 /* Make sure a parameter that has been implicitly typed still
14611 matches the implicit type, since PARAMETER statements can precede
14612 IMPLICIT statements. */
14613 if (sym
->attr
.implicit_type
14614 && !gfc_compare_types (&sym
->ts
, gfc_get_default_type (sym
->name
,
14617 gfc_error ("Implicitly typed PARAMETER %qs at %L doesn't match a "
14618 "later IMPLICIT type", sym
->name
, &sym
->declared_at
);
14622 /* Make sure the types of derived parameters are consistent. This
14623 type checking is deferred until resolution because the type may
14624 refer to a derived type from the host. */
14625 if (sym
->ts
.type
== BT_DERIVED
14626 && !gfc_compare_types (&sym
->ts
, &sym
->value
->ts
))
14628 gfc_error ("Incompatible derived type in PARAMETER at %L",
14629 &sym
->value
->where
);
14633 /* F03:C509,C514. */
14634 if (sym
->ts
.type
== BT_CLASS
)
14636 gfc_error ("CLASS variable %qs at %L cannot have the PARAMETER attribute",
14637 sym
->name
, &sym
->declared_at
);
14645 /* Called by resolve_symbol to check PDTs. */
14648 resolve_pdt (gfc_symbol
* sym
)
14650 gfc_symbol
*derived
= NULL
;
14651 gfc_actual_arglist
*param
;
14653 bool const_len_exprs
= true;
14654 bool assumed_len_exprs
= false;
14655 symbol_attribute
*attr
;
14657 if (sym
->ts
.type
== BT_DERIVED
)
14659 derived
= sym
->ts
.u
.derived
;
14660 attr
= &(sym
->attr
);
14662 else if (sym
->ts
.type
== BT_CLASS
)
14664 derived
= CLASS_DATA (sym
)->ts
.u
.derived
;
14665 attr
= &(CLASS_DATA (sym
)->attr
);
14668 gcc_unreachable ();
14670 gcc_assert (derived
->attr
.pdt_type
);
14672 for (param
= sym
->param_list
; param
; param
= param
->next
)
14674 c
= gfc_find_component (derived
, param
->name
, false, true, NULL
);
14676 if (c
->attr
.pdt_kind
)
14679 if (param
->expr
&& !gfc_is_constant_expr (param
->expr
)
14680 && c
->attr
.pdt_len
)
14681 const_len_exprs
= false;
14682 else if (param
->spec_type
== SPEC_ASSUMED
)
14683 assumed_len_exprs
= true;
14685 if (param
->spec_type
== SPEC_DEFERRED
14686 && !attr
->allocatable
&& !attr
->pointer
)
14687 gfc_error ("The object %qs at %L has a deferred LEN "
14688 "parameter %qs and is neither allocatable "
14689 "nor a pointer", sym
->name
, &sym
->declared_at
,
14694 if (!const_len_exprs
14695 && (sym
->ns
->proc_name
->attr
.is_main_program
14696 || sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
14697 || sym
->attr
.save
!= SAVE_NONE
))
14698 gfc_error ("The AUTOMATIC object %qs at %L must not have the "
14699 "SAVE attribute or be a variable declared in the "
14700 "main program, a module or a submodule(F08/C513)",
14701 sym
->name
, &sym
->declared_at
);
14703 if (assumed_len_exprs
&& !(sym
->attr
.dummy
14704 || sym
->attr
.select_type_temporary
|| sym
->attr
.associate_var
))
14705 gfc_error ("The object %qs at %L with ASSUMED type parameters "
14706 "must be a dummy or a SELECT TYPE selector(F08/4.2)",
14707 sym
->name
, &sym
->declared_at
);
14711 /* Do anything necessary to resolve a symbol. Right now, we just
14712 assume that an otherwise unknown symbol is a variable. This sort
14713 of thing commonly happens for symbols in module. */
14716 resolve_symbol (gfc_symbol
*sym
)
14718 int check_constant
, mp_flag
;
14719 gfc_symtree
*symtree
;
14720 gfc_symtree
*this_symtree
;
14723 symbol_attribute class_attr
;
14724 gfc_array_spec
*as
;
14725 bool saved_specification_expr
;
14731 /* No symbol will ever have union type; only components can be unions.
14732 Union type declaration symbols have type BT_UNKNOWN but flavor FL_UNION
14733 (just like derived type declaration symbols have flavor FL_DERIVED). */
14734 gcc_assert (sym
->ts
.type
!= BT_UNION
);
14736 /* Coarrayed polymorphic objects with allocatable or pointer components are
14737 yet unsupported for -fcoarray=lib. */
14738 if (flag_coarray
== GFC_FCOARRAY_LIB
&& sym
->ts
.type
== BT_CLASS
14739 && sym
->ts
.u
.derived
&& CLASS_DATA (sym
)
14740 && CLASS_DATA (sym
)->attr
.codimension
14741 && (CLASS_DATA (sym
)->ts
.u
.derived
->attr
.alloc_comp
14742 || CLASS_DATA (sym
)->ts
.u
.derived
->attr
.pointer_comp
))
14744 gfc_error ("Sorry, allocatable/pointer components in polymorphic (CLASS) "
14745 "type coarrays at %L are unsupported", &sym
->declared_at
);
14749 if (sym
->attr
.artificial
)
14752 if (sym
->attr
.unlimited_polymorphic
)
14755 if (sym
->attr
.flavor
== FL_UNKNOWN
14756 || (sym
->attr
.flavor
== FL_PROCEDURE
&& !sym
->attr
.intrinsic
14757 && !sym
->attr
.generic
&& !sym
->attr
.external
14758 && sym
->attr
.if_source
== IFSRC_UNKNOWN
14759 && sym
->ts
.type
== BT_UNKNOWN
))
14762 /* If we find that a flavorless symbol is an interface in one of the
14763 parent namespaces, find its symtree in this namespace, free the
14764 symbol and set the symtree to point to the interface symbol. */
14765 for (ns
= gfc_current_ns
->parent
; ns
; ns
= ns
->parent
)
14767 symtree
= gfc_find_symtree (ns
->sym_root
, sym
->name
);
14768 if (symtree
&& (symtree
->n
.sym
->generic
||
14769 (symtree
->n
.sym
->attr
.flavor
== FL_PROCEDURE
14770 && sym
->ns
->construct_entities
)))
14772 this_symtree
= gfc_find_symtree (gfc_current_ns
->sym_root
,
14774 if (this_symtree
->n
.sym
== sym
)
14776 symtree
->n
.sym
->refs
++;
14777 gfc_release_symbol (sym
);
14778 this_symtree
->n
.sym
= symtree
->n
.sym
;
14784 /* Otherwise give it a flavor according to such attributes as
14786 if (sym
->attr
.flavor
== FL_UNKNOWN
&& sym
->attr
.external
== 0
14787 && sym
->attr
.intrinsic
== 0)
14788 sym
->attr
.flavor
= FL_VARIABLE
;
14789 else if (sym
->attr
.flavor
== FL_UNKNOWN
)
14791 sym
->attr
.flavor
= FL_PROCEDURE
;
14792 if (sym
->attr
.dimension
)
14793 sym
->attr
.function
= 1;
14797 if (sym
->attr
.external
&& sym
->ts
.type
!= BT_UNKNOWN
&& !sym
->attr
.function
)
14798 gfc_add_function (&sym
->attr
, sym
->name
, &sym
->declared_at
);
14800 if (sym
->attr
.procedure
&& sym
->attr
.if_source
!= IFSRC_DECL
14801 && !resolve_procedure_interface (sym
))
14804 if (sym
->attr
.is_protected
&& !sym
->attr
.proc_pointer
14805 && (sym
->attr
.procedure
|| sym
->attr
.external
))
14807 if (sym
->attr
.external
)
14808 gfc_error ("PROTECTED attribute conflicts with EXTERNAL attribute "
14809 "at %L", &sym
->declared_at
);
14811 gfc_error ("PROCEDURE attribute conflicts with PROTECTED attribute "
14812 "at %L", &sym
->declared_at
);
14817 if (sym
->attr
.flavor
== FL_DERIVED
&& !resolve_fl_derived (sym
))
14820 else if ((sym
->attr
.flavor
== FL_STRUCT
|| sym
->attr
.flavor
== FL_UNION
)
14821 && !resolve_fl_struct (sym
))
14824 /* Symbols that are module procedures with results (functions) have
14825 the types and array specification copied for type checking in
14826 procedures that call them, as well as for saving to a module
14827 file. These symbols can't stand the scrutiny that their results
14829 mp_flag
= (sym
->result
!= NULL
&& sym
->result
!= sym
);
14831 /* Make sure that the intrinsic is consistent with its internal
14832 representation. This needs to be done before assigning a default
14833 type to avoid spurious warnings. */
14834 if (sym
->attr
.flavor
!= FL_MODULE
&& sym
->attr
.intrinsic
14835 && !gfc_resolve_intrinsic (sym
, &sym
->declared_at
))
14838 /* Resolve associate names. */
14840 resolve_assoc_var (sym
, true);
14842 /* Assign default type to symbols that need one and don't have one. */
14843 if (sym
->ts
.type
== BT_UNKNOWN
)
14845 if (sym
->attr
.flavor
== FL_VARIABLE
|| sym
->attr
.flavor
== FL_PARAMETER
)
14847 gfc_set_default_type (sym
, 1, NULL
);
14850 if (sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.external
14851 && !sym
->attr
.function
&& !sym
->attr
.subroutine
14852 && gfc_get_default_type (sym
->name
, sym
->ns
)->type
== BT_UNKNOWN
)
14853 gfc_add_subroutine (&sym
->attr
, sym
->name
, &sym
->declared_at
);
14855 if (sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.function
)
14857 /* The specific case of an external procedure should emit an error
14858 in the case that there is no implicit type. */
14861 if (!sym
->attr
.mixed_entry_master
)
14862 gfc_set_default_type (sym
, sym
->attr
.external
, NULL
);
14866 /* Result may be in another namespace. */
14867 resolve_symbol (sym
->result
);
14869 if (!sym
->result
->attr
.proc_pointer
)
14871 sym
->ts
= sym
->result
->ts
;
14872 sym
->as
= gfc_copy_array_spec (sym
->result
->as
);
14873 sym
->attr
.dimension
= sym
->result
->attr
.dimension
;
14874 sym
->attr
.pointer
= sym
->result
->attr
.pointer
;
14875 sym
->attr
.allocatable
= sym
->result
->attr
.allocatable
;
14876 sym
->attr
.contiguous
= sym
->result
->attr
.contiguous
;
14881 else if (mp_flag
&& sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.function
)
14883 bool saved_specification_expr
= specification_expr
;
14884 specification_expr
= true;
14885 gfc_resolve_array_spec (sym
->result
->as
, false);
14886 specification_expr
= saved_specification_expr
;
14889 if (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
)
14891 as
= CLASS_DATA (sym
)->as
;
14892 class_attr
= CLASS_DATA (sym
)->attr
;
14893 class_attr
.pointer
= class_attr
.class_pointer
;
14897 class_attr
= sym
->attr
;
14902 if (sym
->attr
.contiguous
14903 && (!class_attr
.dimension
14904 || (as
->type
!= AS_ASSUMED_SHAPE
&& as
->type
!= AS_ASSUMED_RANK
14905 && !class_attr
.pointer
)))
14907 gfc_error ("%qs at %L has the CONTIGUOUS attribute but is not an "
14908 "array pointer or an assumed-shape or assumed-rank array",
14909 sym
->name
, &sym
->declared_at
);
14913 /* Assumed size arrays and assumed shape arrays must be dummy
14914 arguments. Array-spec's of implied-shape should have been resolved to
14915 AS_EXPLICIT already. */
14919 /* If AS_IMPLIED_SHAPE makes it to here, it must be a bad
14920 specification expression. */
14921 if (as
->type
== AS_IMPLIED_SHAPE
)
14924 for (i
=0; i
<as
->rank
; i
++)
14926 if (as
->lower
[i
] != NULL
&& as
->upper
[i
] == NULL
)
14928 gfc_error ("Bad specification for assumed size array at %L",
14929 &as
->lower
[i
]->where
);
14936 if (((as
->type
== AS_ASSUMED_SIZE
&& !as
->cp_was_assumed
)
14937 || as
->type
== AS_ASSUMED_SHAPE
)
14938 && !sym
->attr
.dummy
&& !sym
->attr
.select_type_temporary
)
14940 if (as
->type
== AS_ASSUMED_SIZE
)
14941 gfc_error ("Assumed size array at %L must be a dummy argument",
14942 &sym
->declared_at
);
14944 gfc_error ("Assumed shape array at %L must be a dummy argument",
14945 &sym
->declared_at
);
14948 /* TS 29113, C535a. */
14949 if (as
->type
== AS_ASSUMED_RANK
&& !sym
->attr
.dummy
14950 && !sym
->attr
.select_type_temporary
)
14952 gfc_error ("Assumed-rank array at %L must be a dummy argument",
14953 &sym
->declared_at
);
14956 if (as
->type
== AS_ASSUMED_RANK
14957 && (sym
->attr
.codimension
|| sym
->attr
.value
))
14959 gfc_error ("Assumed-rank array at %L may not have the VALUE or "
14960 "CODIMENSION attribute", &sym
->declared_at
);
14965 /* Make sure symbols with known intent or optional are really dummy
14966 variable. Because of ENTRY statement, this has to be deferred
14967 until resolution time. */
14969 if (!sym
->attr
.dummy
14970 && (sym
->attr
.optional
|| sym
->attr
.intent
!= INTENT_UNKNOWN
))
14972 gfc_error ("Symbol at %L is not a DUMMY variable", &sym
->declared_at
);
14976 if (sym
->attr
.value
&& !sym
->attr
.dummy
)
14978 gfc_error ("%qs at %L cannot have the VALUE attribute because "
14979 "it is not a dummy argument", sym
->name
, &sym
->declared_at
);
14983 if (sym
->attr
.value
&& sym
->ts
.type
== BT_CHARACTER
)
14985 gfc_charlen
*cl
= sym
->ts
.u
.cl
;
14986 if (!cl
|| !cl
->length
|| cl
->length
->expr_type
!= EXPR_CONSTANT
)
14988 gfc_error ("Character dummy variable %qs at %L with VALUE "
14989 "attribute must have constant length",
14990 sym
->name
, &sym
->declared_at
);
14994 if (sym
->ts
.is_c_interop
14995 && mpz_cmp_si (cl
->length
->value
.integer
, 1) != 0)
14997 gfc_error ("C interoperable character dummy variable %qs at %L "
14998 "with VALUE attribute must have length one",
14999 sym
->name
, &sym
->declared_at
);
15004 if (sym
->ts
.type
== BT_DERIVED
&& !sym
->attr
.is_iso_c
15005 && sym
->ts
.u
.derived
->attr
.generic
)
15007 sym
->ts
.u
.derived
= gfc_find_dt_in_generic (sym
->ts
.u
.derived
);
15008 if (!sym
->ts
.u
.derived
)
15010 gfc_error ("The derived type %qs at %L is of type %qs, "
15011 "which has not been defined", sym
->name
,
15012 &sym
->declared_at
, sym
->ts
.u
.derived
->name
);
15013 sym
->ts
.type
= BT_UNKNOWN
;
15018 /* Use the same constraints as TYPE(*), except for the type check
15019 and that only scalars and assumed-size arrays are permitted. */
15020 if (sym
->attr
.ext_attr
& (1 << EXT_ATTR_NO_ARG_CHECK
))
15022 if (!sym
->attr
.dummy
)
15024 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute shall be "
15025 "a dummy argument", sym
->name
, &sym
->declared_at
);
15029 if (sym
->ts
.type
!= BT_ASSUMED
&& sym
->ts
.type
!= BT_INTEGER
15030 && sym
->ts
.type
!= BT_REAL
&& sym
->ts
.type
!= BT_LOGICAL
15031 && sym
->ts
.type
!= BT_COMPLEX
)
15033 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute shall be "
15034 "of type TYPE(*) or of an numeric intrinsic type",
15035 sym
->name
, &sym
->declared_at
);
15039 if (sym
->attr
.allocatable
|| sym
->attr
.codimension
15040 || sym
->attr
.pointer
|| sym
->attr
.value
)
15042 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute may not "
15043 "have the ALLOCATABLE, CODIMENSION, POINTER or VALUE "
15044 "attribute", sym
->name
, &sym
->declared_at
);
15048 if (sym
->attr
.intent
== INTENT_OUT
)
15050 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute may not "
15051 "have the INTENT(OUT) attribute",
15052 sym
->name
, &sym
->declared_at
);
15055 if (sym
->attr
.dimension
&& sym
->as
->type
!= AS_ASSUMED_SIZE
)
15057 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute shall "
15058 "either be a scalar or an assumed-size array",
15059 sym
->name
, &sym
->declared_at
);
15063 /* Set the type to TYPE(*) and add a dimension(*) to ensure
15064 NO_ARG_CHECK is correctly handled in trans*.c, e.g. with
15066 sym
->ts
.type
= BT_ASSUMED
;
15067 sym
->as
= gfc_get_array_spec ();
15068 sym
->as
->type
= AS_ASSUMED_SIZE
;
15070 sym
->as
->lower
[0] = gfc_get_int_expr (gfc_default_integer_kind
, NULL
, 1);
15072 else if (sym
->ts
.type
== BT_ASSUMED
)
15074 /* TS 29113, C407a. */
15075 if (!sym
->attr
.dummy
)
15077 gfc_error ("Assumed type of variable %s at %L is only permitted "
15078 "for dummy variables", sym
->name
, &sym
->declared_at
);
15081 if (sym
->attr
.allocatable
|| sym
->attr
.codimension
15082 || sym
->attr
.pointer
|| sym
->attr
.value
)
15084 gfc_error ("Assumed-type variable %s at %L may not have the "
15085 "ALLOCATABLE, CODIMENSION, POINTER or VALUE attribute",
15086 sym
->name
, &sym
->declared_at
);
15089 if (sym
->attr
.intent
== INTENT_OUT
)
15091 gfc_error ("Assumed-type variable %s at %L may not have the "
15092 "INTENT(OUT) attribute",
15093 sym
->name
, &sym
->declared_at
);
15096 if (sym
->attr
.dimension
&& sym
->as
->type
== AS_EXPLICIT
)
15098 gfc_error ("Assumed-type variable %s at %L shall not be an "
15099 "explicit-shape array", sym
->name
, &sym
->declared_at
);
15104 /* If the symbol is marked as bind(c), that it is declared at module level
15105 scope and verify its type and kind. Do not do the latter for symbols
15106 that are implicitly typed because that is handled in
15107 gfc_set_default_type. Handle dummy arguments and procedure definitions
15108 separately. Also, anything that is use associated is not handled here
15109 but instead is handled in the module it is declared in. Finally, derived
15110 type definitions are allowed to be BIND(C) since that only implies that
15111 they're interoperable, and they are checked fully for interoperability
15112 when a variable is declared of that type. */
15113 if (sym
->attr
.is_bind_c
&& sym
->attr
.use_assoc
== 0
15114 && sym
->attr
.dummy
== 0 && sym
->attr
.flavor
!= FL_PROCEDURE
15115 && sym
->attr
.flavor
!= FL_DERIVED
)
15119 /* First, make sure the variable is declared at the
15120 module-level scope (J3/04-007, Section 15.3). */
15121 if (sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
&&
15122 sym
->attr
.in_common
== 0)
15124 gfc_error ("Variable %qs at %L cannot be BIND(C) because it "
15125 "is neither a COMMON block nor declared at the "
15126 "module level scope", sym
->name
, &(sym
->declared_at
));
15129 else if (sym
->ts
.type
== BT_CHARACTER
15130 && (sym
->ts
.u
.cl
== NULL
|| sym
->ts
.u
.cl
->length
== NULL
15131 || !gfc_is_constant_expr (sym
->ts
.u
.cl
->length
)
15132 || mpz_cmp_si (sym
->ts
.u
.cl
->length
->value
.integer
, 1) != 0))
15134 gfc_error ("BIND(C) Variable %qs at %L must have length one",
15135 sym
->name
, &sym
->declared_at
);
15138 else if (sym
->common_head
!= NULL
&& sym
->attr
.implicit_type
== 0)
15140 t
= verify_com_block_vars_c_interop (sym
->common_head
);
15142 else if (sym
->attr
.implicit_type
== 0)
15144 /* If type() declaration, we need to verify that the components
15145 of the given type are all C interoperable, etc. */
15146 if (sym
->ts
.type
== BT_DERIVED
&&
15147 sym
->ts
.u
.derived
->attr
.is_c_interop
!= 1)
15149 /* Make sure the user marked the derived type as BIND(C). If
15150 not, call the verify routine. This could print an error
15151 for the derived type more than once if multiple variables
15152 of that type are declared. */
15153 if (sym
->ts
.u
.derived
->attr
.is_bind_c
!= 1)
15154 verify_bind_c_derived_type (sym
->ts
.u
.derived
);
15158 /* Verify the variable itself as C interoperable if it
15159 is BIND(C). It is not possible for this to succeed if
15160 the verify_bind_c_derived_type failed, so don't have to handle
15161 any error returned by verify_bind_c_derived_type. */
15162 t
= verify_bind_c_sym (sym
, &(sym
->ts
), sym
->attr
.in_common
,
15163 sym
->common_block
);
15168 /* clear the is_bind_c flag to prevent reporting errors more than
15169 once if something failed. */
15170 sym
->attr
.is_bind_c
= 0;
15175 /* If a derived type symbol has reached this point, without its
15176 type being declared, we have an error. Notice that most
15177 conditions that produce undefined derived types have already
15178 been dealt with. However, the likes of:
15179 implicit type(t) (t) ..... call foo (t) will get us here if
15180 the type is not declared in the scope of the implicit
15181 statement. Change the type to BT_UNKNOWN, both because it is so
15182 and to prevent an ICE. */
15183 if (sym
->ts
.type
== BT_DERIVED
&& !sym
->attr
.is_iso_c
15184 && sym
->ts
.u
.derived
->components
== NULL
15185 && !sym
->ts
.u
.derived
->attr
.zero_comp
)
15187 gfc_error ("The derived type %qs at %L is of type %qs, "
15188 "which has not been defined", sym
->name
,
15189 &sym
->declared_at
, sym
->ts
.u
.derived
->name
);
15190 sym
->ts
.type
= BT_UNKNOWN
;
15194 /* Make sure that the derived type has been resolved and that the
15195 derived type is visible in the symbol's namespace, if it is a
15196 module function and is not PRIVATE. */
15197 if (sym
->ts
.type
== BT_DERIVED
15198 && sym
->ts
.u
.derived
->attr
.use_assoc
15199 && sym
->ns
->proc_name
15200 && sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
15201 && !resolve_fl_derived (sym
->ts
.u
.derived
))
15204 /* Unless the derived-type declaration is use associated, Fortran 95
15205 does not allow public entries of private derived types.
15206 See 4.4.1 (F95) and 4.5.1.1 (F2003); and related interpretation
15207 161 in 95-006r3. */
15208 if (sym
->ts
.type
== BT_DERIVED
15209 && sym
->ns
->proc_name
&& sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
15210 && !sym
->ts
.u
.derived
->attr
.use_assoc
15211 && gfc_check_symbol_access (sym
)
15212 && !gfc_check_symbol_access (sym
->ts
.u
.derived
)
15213 && !gfc_notify_std (GFC_STD_F2003
, "PUBLIC %s %qs at %L of PRIVATE "
15214 "derived type %qs",
15215 (sym
->attr
.flavor
== FL_PARAMETER
)
15216 ? "parameter" : "variable",
15217 sym
->name
, &sym
->declared_at
,
15218 sym
->ts
.u
.derived
->name
))
15221 /* F2008, C1302. */
15222 if (sym
->ts
.type
== BT_DERIVED
15223 && ((sym
->ts
.u
.derived
->from_intmod
== INTMOD_ISO_FORTRAN_ENV
15224 && sym
->ts
.u
.derived
->intmod_sym_id
== ISOFORTRAN_LOCK_TYPE
)
15225 || sym
->ts
.u
.derived
->attr
.lock_comp
)
15226 && !sym
->attr
.codimension
&& !sym
->ts
.u
.derived
->attr
.coarray_comp
)
15228 gfc_error ("Variable %s at %L of type LOCK_TYPE or with subcomponent of "
15229 "type LOCK_TYPE must be a coarray", sym
->name
,
15230 &sym
->declared_at
);
15234 /* TS18508, C702/C703. */
15235 if (sym
->ts
.type
== BT_DERIVED
15236 && ((sym
->ts
.u
.derived
->from_intmod
== INTMOD_ISO_FORTRAN_ENV
15237 && sym
->ts
.u
.derived
->intmod_sym_id
== ISOFORTRAN_EVENT_TYPE
)
15238 || sym
->ts
.u
.derived
->attr
.event_comp
)
15239 && !sym
->attr
.codimension
&& !sym
->ts
.u
.derived
->attr
.coarray_comp
)
15241 gfc_error ("Variable %s at %L of type EVENT_TYPE or with subcomponent of "
15242 "type EVENT_TYPE must be a coarray", sym
->name
,
15243 &sym
->declared_at
);
15247 /* An assumed-size array with INTENT(OUT) shall not be of a type for which
15248 default initialization is defined (5.1.2.4.4). */
15249 if (sym
->ts
.type
== BT_DERIVED
15251 && sym
->attr
.intent
== INTENT_OUT
15253 && sym
->as
->type
== AS_ASSUMED_SIZE
)
15255 for (c
= sym
->ts
.u
.derived
->components
; c
; c
= c
->next
)
15257 if (c
->initializer
)
15259 gfc_error ("The INTENT(OUT) dummy argument %qs at %L is "
15260 "ASSUMED SIZE and so cannot have a default initializer",
15261 sym
->name
, &sym
->declared_at
);
15268 if (sym
->ts
.type
== BT_DERIVED
&& sym
->attr
.dummy
15269 && sym
->attr
.intent
== INTENT_OUT
&& sym
->attr
.lock_comp
)
15271 gfc_error ("Dummy argument %qs at %L of LOCK_TYPE shall not be "
15272 "INTENT(OUT)", sym
->name
, &sym
->declared_at
);
15277 if (sym
->ts
.type
== BT_DERIVED
&& sym
->attr
.dummy
15278 && sym
->attr
.intent
== INTENT_OUT
&& sym
->attr
.event_comp
)
15280 gfc_error ("Dummy argument %qs at %L of EVENT_TYPE shall not be "
15281 "INTENT(OUT)", sym
->name
, &sym
->declared_at
);
15286 if ((((sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
->attr
.coarray_comp
)
15287 || (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
15288 && CLASS_DATA (sym
)->attr
.coarray_comp
))
15289 || class_attr
.codimension
)
15290 && (sym
->attr
.result
|| sym
->result
== sym
))
15292 gfc_error ("Function result %qs at %L shall not be a coarray or have "
15293 "a coarray component", sym
->name
, &sym
->declared_at
);
15298 if (sym
->attr
.codimension
&& sym
->ts
.type
== BT_DERIVED
15299 && sym
->ts
.u
.derived
->ts
.is_iso_c
)
15301 gfc_error ("Variable %qs at %L of TYPE(C_PTR) or TYPE(C_FUNPTR) "
15302 "shall not be a coarray", sym
->name
, &sym
->declared_at
);
15307 if (((sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
->attr
.coarray_comp
)
15308 || (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
15309 && CLASS_DATA (sym
)->attr
.coarray_comp
))
15310 && (class_attr
.codimension
|| class_attr
.pointer
|| class_attr
.dimension
15311 || class_attr
.allocatable
))
15313 gfc_error ("Variable %qs at %L with coarray component shall be a "
15314 "nonpointer, nonallocatable scalar, which is not a coarray",
15315 sym
->name
, &sym
->declared_at
);
15319 /* F2008, C526. The function-result case was handled above. */
15320 if (class_attr
.codimension
15321 && !(class_attr
.allocatable
|| sym
->attr
.dummy
|| sym
->attr
.save
15322 || sym
->attr
.select_type_temporary
15323 || sym
->attr
.associate_var
15324 || (sym
->ns
->save_all
&& !sym
->attr
.automatic
)
15325 || sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
15326 || sym
->ns
->proc_name
->attr
.is_main_program
15327 || sym
->attr
.function
|| sym
->attr
.result
|| sym
->attr
.use_assoc
))
15329 gfc_error ("Variable %qs at %L is a coarray and is not ALLOCATABLE, SAVE "
15330 "nor a dummy argument", sym
->name
, &sym
->declared_at
);
15334 else if (class_attr
.codimension
&& !sym
->attr
.select_type_temporary
15335 && !class_attr
.allocatable
&& as
&& as
->cotype
== AS_DEFERRED
)
15337 gfc_error ("Coarray variable %qs at %L shall not have codimensions with "
15338 "deferred shape", sym
->name
, &sym
->declared_at
);
15341 else if (class_attr
.codimension
&& class_attr
.allocatable
&& as
15342 && (as
->cotype
!= AS_DEFERRED
|| as
->type
!= AS_DEFERRED
))
15344 gfc_error ("Allocatable coarray variable %qs at %L must have "
15345 "deferred shape", sym
->name
, &sym
->declared_at
);
15350 if ((((sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
->attr
.coarray_comp
)
15351 || (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
15352 && CLASS_DATA (sym
)->attr
.coarray_comp
))
15353 || (class_attr
.codimension
&& class_attr
.allocatable
))
15354 && sym
->attr
.dummy
&& sym
->attr
.intent
== INTENT_OUT
)
15356 gfc_error ("Variable %qs at %L is INTENT(OUT) and can thus not be an "
15357 "allocatable coarray or have coarray components",
15358 sym
->name
, &sym
->declared_at
);
15362 if (class_attr
.codimension
&& sym
->attr
.dummy
15363 && sym
->ns
->proc_name
&& sym
->ns
->proc_name
->attr
.is_bind_c
)
15365 gfc_error ("Coarray dummy variable %qs at %L not allowed in BIND(C) "
15366 "procedure %qs", sym
->name
, &sym
->declared_at
,
15367 sym
->ns
->proc_name
->name
);
15371 if (sym
->ts
.type
== BT_LOGICAL
15372 && ((sym
->attr
.function
&& sym
->attr
.is_bind_c
&& sym
->result
== sym
)
15373 || ((sym
->attr
.dummy
|| sym
->attr
.result
) && sym
->ns
->proc_name
15374 && sym
->ns
->proc_name
->attr
.is_bind_c
)))
15377 for (i
= 0; gfc_logical_kinds
[i
].kind
; i
++)
15378 if (gfc_logical_kinds
[i
].kind
== sym
->ts
.kind
)
15380 if (!gfc_logical_kinds
[i
].c_bool
&& sym
->attr
.dummy
15381 && !gfc_notify_std (GFC_STD_GNU
, "LOGICAL dummy argument %qs at "
15382 "%L with non-C_Bool kind in BIND(C) procedure "
15383 "%qs", sym
->name
, &sym
->declared_at
,
15384 sym
->ns
->proc_name
->name
))
15386 else if (!gfc_logical_kinds
[i
].c_bool
15387 && !gfc_notify_std (GFC_STD_GNU
, "LOGICAL result variable "
15388 "%qs at %L with non-C_Bool kind in "
15389 "BIND(C) procedure %qs", sym
->name
,
15391 sym
->attr
.function
? sym
->name
15392 : sym
->ns
->proc_name
->name
))
15396 switch (sym
->attr
.flavor
)
15399 if (!resolve_fl_variable (sym
, mp_flag
))
15404 if (sym
->formal
&& !sym
->formal_ns
)
15406 /* Check that none of the arguments are a namelist. */
15407 gfc_formal_arglist
*formal
= sym
->formal
;
15409 for (; formal
; formal
= formal
->next
)
15410 if (formal
->sym
&& formal
->sym
->attr
.flavor
== FL_NAMELIST
)
15412 gfc_error ("Namelist %qs cannot be an argument to "
15413 "subroutine or function at %L",
15414 formal
->sym
->name
, &sym
->declared_at
);
15419 if (!resolve_fl_procedure (sym
, mp_flag
))
15424 if (!resolve_fl_namelist (sym
))
15429 if (!resolve_fl_parameter (sym
))
15437 /* Resolve array specifier. Check as well some constraints
15438 on COMMON blocks. */
15440 check_constant
= sym
->attr
.in_common
&& !sym
->attr
.pointer
;
15442 /* Set the formal_arg_flag so that check_conflict will not throw
15443 an error for host associated variables in the specification
15444 expression for an array_valued function. */
15445 if ((sym
->attr
.function
|| sym
->attr
.result
) && sym
->as
)
15446 formal_arg_flag
= true;
15448 saved_specification_expr
= specification_expr
;
15449 specification_expr
= true;
15450 gfc_resolve_array_spec (sym
->as
, check_constant
);
15451 specification_expr
= saved_specification_expr
;
15453 formal_arg_flag
= false;
15455 /* Resolve formal namespaces. */
15456 if (sym
->formal_ns
&& sym
->formal_ns
!= gfc_current_ns
15457 && !sym
->attr
.contained
&& !sym
->attr
.intrinsic
)
15458 gfc_resolve (sym
->formal_ns
);
15460 /* Make sure the formal namespace is present. */
15461 if (sym
->formal
&& !sym
->formal_ns
)
15463 gfc_formal_arglist
*formal
= sym
->formal
;
15464 while (formal
&& !formal
->sym
)
15465 formal
= formal
->next
;
15469 sym
->formal_ns
= formal
->sym
->ns
;
15470 if (sym
->ns
!= formal
->sym
->ns
)
15471 sym
->formal_ns
->refs
++;
15475 /* Check threadprivate restrictions. */
15476 if (sym
->attr
.threadprivate
&& !sym
->attr
.save
15477 && !(sym
->ns
->save_all
&& !sym
->attr
.automatic
)
15478 && (!sym
->attr
.in_common
15479 && sym
->module
== NULL
15480 && (sym
->ns
->proc_name
== NULL
15481 || sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
)))
15482 gfc_error ("Threadprivate at %L isn't SAVEd", &sym
->declared_at
);
15484 /* Check omp declare target restrictions. */
15485 if (sym
->attr
.omp_declare_target
15486 && sym
->attr
.flavor
== FL_VARIABLE
15488 && !(sym
->ns
->save_all
&& !sym
->attr
.automatic
)
15489 && (!sym
->attr
.in_common
15490 && sym
->module
== NULL
15491 && (sym
->ns
->proc_name
== NULL
15492 || sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
)))
15493 gfc_error ("!$OMP DECLARE TARGET variable %qs at %L isn't SAVEd",
15494 sym
->name
, &sym
->declared_at
);
15496 /* If we have come this far we can apply default-initializers, as
15497 described in 14.7.5, to those variables that have not already
15498 been assigned one. */
15499 if (sym
->ts
.type
== BT_DERIVED
15501 && !sym
->attr
.allocatable
15502 && !sym
->attr
.alloc_comp
)
15504 symbol_attribute
*a
= &sym
->attr
;
15506 if ((!a
->save
&& !a
->dummy
&& !a
->pointer
15507 && !a
->in_common
&& !a
->use_assoc
15509 && !((a
->function
|| a
->result
)
15511 || sym
->ts
.u
.derived
->attr
.alloc_comp
15512 || sym
->ts
.u
.derived
->attr
.pointer_comp
))
15513 && !(a
->function
&& sym
!= sym
->result
))
15514 || (a
->dummy
&& a
->intent
== INTENT_OUT
&& !a
->pointer
))
15515 apply_default_init (sym
);
15516 else if (a
->function
&& sym
->result
&& a
->access
!= ACCESS_PRIVATE
15517 && (sym
->ts
.u
.derived
->attr
.alloc_comp
15518 || sym
->ts
.u
.derived
->attr
.pointer_comp
))
15519 /* Mark the result symbol to be referenced, when it has allocatable
15521 sym
->result
->attr
.referenced
= 1;
15524 if (sym
->ts
.type
== BT_CLASS
&& sym
->ns
== gfc_current_ns
15525 && sym
->attr
.dummy
&& sym
->attr
.intent
== INTENT_OUT
15526 && !CLASS_DATA (sym
)->attr
.class_pointer
15527 && !CLASS_DATA (sym
)->attr
.allocatable
)
15528 apply_default_init (sym
);
15530 /* If this symbol has a type-spec, check it. */
15531 if (sym
->attr
.flavor
== FL_VARIABLE
|| sym
->attr
.flavor
== FL_PARAMETER
15532 || (sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.function
))
15533 if (!resolve_typespec_used (&sym
->ts
, &sym
->declared_at
, sym
->name
))
15536 if (sym
->param_list
)
15541 /************* Resolve DATA statements *************/
15545 gfc_data_value
*vnode
;
15551 /* Advance the values structure to point to the next value in the data list. */
15554 next_data_value (void)
15556 while (mpz_cmp_ui (values
.left
, 0) == 0)
15559 if (values
.vnode
->next
== NULL
)
15562 values
.vnode
= values
.vnode
->next
;
15563 mpz_set (values
.left
, values
.vnode
->repeat
);
15571 check_data_variable (gfc_data_variable
*var
, locus
*where
)
15577 ar_type mark
= AR_UNKNOWN
;
15579 mpz_t section_index
[GFC_MAX_DIMENSIONS
];
15585 if (!gfc_resolve_expr (var
->expr
))
15589 mpz_init_set_si (offset
, 0);
15592 if (e
->expr_type
== EXPR_FUNCTION
&& e
->value
.function
.isym
15593 && e
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
)
15594 e
= e
->value
.function
.actual
->expr
;
15596 if (e
->expr_type
!= EXPR_VARIABLE
)
15598 gfc_error ("Expecting definable entity near %L", where
);
15602 sym
= e
->symtree
->n
.sym
;
15604 if (sym
->ns
->is_block_data
&& !sym
->attr
.in_common
)
15606 gfc_error ("BLOCK DATA element %qs at %L must be in COMMON",
15607 sym
->name
, &sym
->declared_at
);
15611 if (e
->ref
== NULL
&& sym
->as
)
15613 gfc_error ("DATA array %qs at %L must be specified in a previous"
15614 " declaration", sym
->name
, where
);
15618 has_pointer
= sym
->attr
.pointer
;
15620 if (gfc_is_coindexed (e
))
15622 gfc_error ("DATA element %qs at %L cannot have a coindex", sym
->name
,
15627 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
15629 if (ref
->type
== REF_COMPONENT
&& ref
->u
.c
.component
->attr
.pointer
)
15633 && ref
->type
== REF_ARRAY
15634 && ref
->u
.ar
.type
!= AR_FULL
)
15636 gfc_error ("DATA element %qs at %L is a pointer and so must "
15637 "be a full array", sym
->name
, where
);
15642 if (e
->rank
== 0 || has_pointer
)
15644 mpz_init_set_ui (size
, 1);
15651 /* Find the array section reference. */
15652 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
15654 if (ref
->type
!= REF_ARRAY
)
15656 if (ref
->u
.ar
.type
== AR_ELEMENT
)
15662 /* Set marks according to the reference pattern. */
15663 switch (ref
->u
.ar
.type
)
15671 /* Get the start position of array section. */
15672 gfc_get_section_index (ar
, section_index
, &offset
);
15677 gcc_unreachable ();
15680 if (!gfc_array_size (e
, &size
))
15682 gfc_error ("Nonconstant array section at %L in DATA statement",
15684 mpz_clear (offset
);
15691 while (mpz_cmp_ui (size
, 0) > 0)
15693 if (!next_data_value ())
15695 gfc_error ("DATA statement at %L has more variables than values",
15701 t
= gfc_check_assign (var
->expr
, values
.vnode
->expr
, 0);
15705 /* If we have more than one element left in the repeat count,
15706 and we have more than one element left in the target variable,
15707 then create a range assignment. */
15708 /* FIXME: Only done for full arrays for now, since array sections
15710 if (mark
== AR_FULL
&& ref
&& ref
->next
== NULL
15711 && mpz_cmp_ui (values
.left
, 1) > 0 && mpz_cmp_ui (size
, 1) > 0)
15715 if (mpz_cmp (size
, values
.left
) >= 0)
15717 mpz_init_set (range
, values
.left
);
15718 mpz_sub (size
, size
, values
.left
);
15719 mpz_set_ui (values
.left
, 0);
15723 mpz_init_set (range
, size
);
15724 mpz_sub (values
.left
, values
.left
, size
);
15725 mpz_set_ui (size
, 0);
15728 t
= gfc_assign_data_value (var
->expr
, values
.vnode
->expr
,
15731 mpz_add (offset
, offset
, range
);
15738 /* Assign initial value to symbol. */
15741 mpz_sub_ui (values
.left
, values
.left
, 1);
15742 mpz_sub_ui (size
, size
, 1);
15744 t
= gfc_assign_data_value (var
->expr
, values
.vnode
->expr
,
15749 if (mark
== AR_FULL
)
15750 mpz_add_ui (offset
, offset
, 1);
15752 /* Modify the array section indexes and recalculate the offset
15753 for next element. */
15754 else if (mark
== AR_SECTION
)
15755 gfc_advance_section (section_index
, ar
, &offset
);
15759 if (mark
== AR_SECTION
)
15761 for (i
= 0; i
< ar
->dimen
; i
++)
15762 mpz_clear (section_index
[i
]);
15766 mpz_clear (offset
);
15772 static bool traverse_data_var (gfc_data_variable
*, locus
*);
15774 /* Iterate over a list of elements in a DATA statement. */
15777 traverse_data_list (gfc_data_variable
*var
, locus
*where
)
15780 iterator_stack frame
;
15781 gfc_expr
*e
, *start
, *end
, *step
;
15782 bool retval
= true;
15784 mpz_init (frame
.value
);
15787 start
= gfc_copy_expr (var
->iter
.start
);
15788 end
= gfc_copy_expr (var
->iter
.end
);
15789 step
= gfc_copy_expr (var
->iter
.step
);
15791 if (!gfc_simplify_expr (start
, 1)
15792 || start
->expr_type
!= EXPR_CONSTANT
)
15794 gfc_error ("start of implied-do loop at %L could not be "
15795 "simplified to a constant value", &start
->where
);
15799 if (!gfc_simplify_expr (end
, 1)
15800 || end
->expr_type
!= EXPR_CONSTANT
)
15802 gfc_error ("end of implied-do loop at %L could not be "
15803 "simplified to a constant value", &start
->where
);
15807 if (!gfc_simplify_expr (step
, 1)
15808 || step
->expr_type
!= EXPR_CONSTANT
)
15810 gfc_error ("step of implied-do loop at %L could not be "
15811 "simplified to a constant value", &start
->where
);
15816 mpz_set (trip
, end
->value
.integer
);
15817 mpz_sub (trip
, trip
, start
->value
.integer
);
15818 mpz_add (trip
, trip
, step
->value
.integer
);
15820 mpz_div (trip
, trip
, step
->value
.integer
);
15822 mpz_set (frame
.value
, start
->value
.integer
);
15824 frame
.prev
= iter_stack
;
15825 frame
.variable
= var
->iter
.var
->symtree
;
15826 iter_stack
= &frame
;
15828 while (mpz_cmp_ui (trip
, 0) > 0)
15830 if (!traverse_data_var (var
->list
, where
))
15836 e
= gfc_copy_expr (var
->expr
);
15837 if (!gfc_simplify_expr (e
, 1))
15844 mpz_add (frame
.value
, frame
.value
, step
->value
.integer
);
15846 mpz_sub_ui (trip
, trip
, 1);
15850 mpz_clear (frame
.value
);
15853 gfc_free_expr (start
);
15854 gfc_free_expr (end
);
15855 gfc_free_expr (step
);
15857 iter_stack
= frame
.prev
;
15862 /* Type resolve variables in the variable list of a DATA statement. */
15865 traverse_data_var (gfc_data_variable
*var
, locus
*where
)
15869 for (; var
; var
= var
->next
)
15871 if (var
->expr
== NULL
)
15872 t
= traverse_data_list (var
, where
);
15874 t
= check_data_variable (var
, where
);
15884 /* Resolve the expressions and iterators associated with a data statement.
15885 This is separate from the assignment checking because data lists should
15886 only be resolved once. */
15889 resolve_data_variables (gfc_data_variable
*d
)
15891 for (; d
; d
= d
->next
)
15893 if (d
->list
== NULL
)
15895 if (!gfc_resolve_expr (d
->expr
))
15900 if (!gfc_resolve_iterator (&d
->iter
, false, true))
15903 if (!resolve_data_variables (d
->list
))
15912 /* Resolve a single DATA statement. We implement this by storing a pointer to
15913 the value list into static variables, and then recursively traversing the
15914 variables list, expanding iterators and such. */
15917 resolve_data (gfc_data
*d
)
15920 if (!resolve_data_variables (d
->var
))
15923 values
.vnode
= d
->value
;
15924 if (d
->value
== NULL
)
15925 mpz_set_ui (values
.left
, 0);
15927 mpz_set (values
.left
, d
->value
->repeat
);
15929 if (!traverse_data_var (d
->var
, &d
->where
))
15932 /* At this point, we better not have any values left. */
15934 if (next_data_value ())
15935 gfc_error ("DATA statement at %L has more values than variables",
15940 /* 12.6 Constraint: In a pure subprogram any variable which is in common or
15941 accessed by host or use association, is a dummy argument to a pure function,
15942 is a dummy argument with INTENT (IN) to a pure subroutine, or an object that
15943 is storage associated with any such variable, shall not be used in the
15944 following contexts: (clients of this function). */
15946 /* Determines if a variable is not 'pure', i.e., not assignable within a pure
15947 procedure. Returns zero if assignment is OK, nonzero if there is a
15950 gfc_impure_variable (gfc_symbol
*sym
)
15955 if (sym
->attr
.use_assoc
|| sym
->attr
.in_common
)
15958 /* Check if the symbol's ns is inside the pure procedure. */
15959 for (ns
= gfc_current_ns
; ns
; ns
= ns
->parent
)
15963 if (ns
->proc_name
->attr
.flavor
== FL_PROCEDURE
&& !sym
->attr
.function
)
15967 proc
= sym
->ns
->proc_name
;
15968 if (sym
->attr
.dummy
15969 && ((proc
->attr
.subroutine
&& sym
->attr
.intent
== INTENT_IN
)
15970 || proc
->attr
.function
))
15973 /* TODO: Sort out what can be storage associated, if anything, and include
15974 it here. In principle equivalences should be scanned but it does not
15975 seem to be possible to storage associate an impure variable this way. */
15980 /* Test whether a symbol is pure or not. For a NULL pointer, checks if the
15981 current namespace is inside a pure procedure. */
15984 gfc_pure (gfc_symbol
*sym
)
15986 symbol_attribute attr
;
15991 /* Check if the current namespace or one of its parents
15992 belongs to a pure procedure. */
15993 for (ns
= gfc_current_ns
; ns
; ns
= ns
->parent
)
15995 sym
= ns
->proc_name
;
15999 if (attr
.flavor
== FL_PROCEDURE
&& attr
.pure
)
16007 return attr
.flavor
== FL_PROCEDURE
&& attr
.pure
;
16011 /* Test whether a symbol is implicitly pure or not. For a NULL pointer,
16012 checks if the current namespace is implicitly pure. Note that this
16013 function returns false for a PURE procedure. */
16016 gfc_implicit_pure (gfc_symbol
*sym
)
16022 /* Check if the current procedure is implicit_pure. Walk up
16023 the procedure list until we find a procedure. */
16024 for (ns
= gfc_current_ns
; ns
; ns
= ns
->parent
)
16026 sym
= ns
->proc_name
;
16030 if (sym
->attr
.flavor
== FL_PROCEDURE
)
16035 return sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.implicit_pure
16036 && !sym
->attr
.pure
;
16041 gfc_unset_implicit_pure (gfc_symbol
*sym
)
16047 /* Check if the current procedure is implicit_pure. Walk up
16048 the procedure list until we find a procedure. */
16049 for (ns
= gfc_current_ns
; ns
; ns
= ns
->parent
)
16051 sym
= ns
->proc_name
;
16055 if (sym
->attr
.flavor
== FL_PROCEDURE
)
16060 if (sym
->attr
.flavor
== FL_PROCEDURE
)
16061 sym
->attr
.implicit_pure
= 0;
16063 sym
->attr
.pure
= 0;
16067 /* Test whether the current procedure is elemental or not. */
16070 gfc_elemental (gfc_symbol
*sym
)
16072 symbol_attribute attr
;
16075 sym
= gfc_current_ns
->proc_name
;
16080 return attr
.flavor
== FL_PROCEDURE
&& attr
.elemental
;
16084 /* Warn about unused labels. */
16087 warn_unused_fortran_label (gfc_st_label
*label
)
16092 warn_unused_fortran_label (label
->left
);
16094 if (label
->defined
== ST_LABEL_UNKNOWN
)
16097 switch (label
->referenced
)
16099 case ST_LABEL_UNKNOWN
:
16100 gfc_warning (OPT_Wunused_label
, "Label %d at %L defined but not used",
16101 label
->value
, &label
->where
);
16104 case ST_LABEL_BAD_TARGET
:
16105 gfc_warning (OPT_Wunused_label
,
16106 "Label %d at %L defined but cannot be used",
16107 label
->value
, &label
->where
);
16114 warn_unused_fortran_label (label
->right
);
16118 /* Returns the sequence type of a symbol or sequence. */
16121 sequence_type (gfc_typespec ts
)
16130 if (ts
.u
.derived
->components
== NULL
)
16131 return SEQ_NONDEFAULT
;
16133 result
= sequence_type (ts
.u
.derived
->components
->ts
);
16134 for (c
= ts
.u
.derived
->components
->next
; c
; c
= c
->next
)
16135 if (sequence_type (c
->ts
) != result
)
16141 if (ts
.kind
!= gfc_default_character_kind
)
16142 return SEQ_NONDEFAULT
;
16144 return SEQ_CHARACTER
;
16147 if (ts
.kind
!= gfc_default_integer_kind
)
16148 return SEQ_NONDEFAULT
;
16150 return SEQ_NUMERIC
;
16153 if (!(ts
.kind
== gfc_default_real_kind
16154 || ts
.kind
== gfc_default_double_kind
))
16155 return SEQ_NONDEFAULT
;
16157 return SEQ_NUMERIC
;
16160 if (ts
.kind
!= gfc_default_complex_kind
)
16161 return SEQ_NONDEFAULT
;
16163 return SEQ_NUMERIC
;
16166 if (ts
.kind
!= gfc_default_logical_kind
)
16167 return SEQ_NONDEFAULT
;
16169 return SEQ_NUMERIC
;
16172 return SEQ_NONDEFAULT
;
16177 /* Resolve derived type EQUIVALENCE object. */
16180 resolve_equivalence_derived (gfc_symbol
*derived
, gfc_symbol
*sym
, gfc_expr
*e
)
16182 gfc_component
*c
= derived
->components
;
16187 /* Shall not be an object of nonsequence derived type. */
16188 if (!derived
->attr
.sequence
)
16190 gfc_error ("Derived type variable %qs at %L must have SEQUENCE "
16191 "attribute to be an EQUIVALENCE object", sym
->name
,
16196 /* Shall not have allocatable components. */
16197 if (derived
->attr
.alloc_comp
)
16199 gfc_error ("Derived type variable %qs at %L cannot have ALLOCATABLE "
16200 "components to be an EQUIVALENCE object",sym
->name
,
16205 if (sym
->attr
.in_common
&& gfc_has_default_initializer (sym
->ts
.u
.derived
))
16207 gfc_error ("Derived type variable %qs at %L with default "
16208 "initialization cannot be in EQUIVALENCE with a variable "
16209 "in COMMON", sym
->name
, &e
->where
);
16213 for (; c
; c
= c
->next
)
16215 if (gfc_bt_struct (c
->ts
.type
)
16216 && (!resolve_equivalence_derived(c
->ts
.u
.derived
, sym
, e
)))
16219 /* Shall not be an object of sequence derived type containing a pointer
16220 in the structure. */
16221 if (c
->attr
.pointer
)
16223 gfc_error ("Derived type variable %qs at %L with pointer "
16224 "component(s) cannot be an EQUIVALENCE object",
16225 sym
->name
, &e
->where
);
16233 /* Resolve equivalence object.
16234 An EQUIVALENCE object shall not be a dummy argument, a pointer, a target,
16235 an allocatable array, an object of nonsequence derived type, an object of
16236 sequence derived type containing a pointer at any level of component
16237 selection, an automatic object, a function name, an entry name, a result
16238 name, a named constant, a structure component, or a subobject of any of
16239 the preceding objects. A substring shall not have length zero. A
16240 derived type shall not have components with default initialization nor
16241 shall two objects of an equivalence group be initialized.
16242 Either all or none of the objects shall have an protected attribute.
16243 The simple constraints are done in symbol.c(check_conflict) and the rest
16244 are implemented here. */
16247 resolve_equivalence (gfc_equiv
*eq
)
16250 gfc_symbol
*first_sym
;
16253 locus
*last_where
= NULL
;
16254 seq_type eq_type
, last_eq_type
;
16255 gfc_typespec
*last_ts
;
16256 int object
, cnt_protected
;
16259 last_ts
= &eq
->expr
->symtree
->n
.sym
->ts
;
16261 first_sym
= eq
->expr
->symtree
->n
.sym
;
16265 for (object
= 1; eq
; eq
= eq
->eq
, object
++)
16269 e
->ts
= e
->symtree
->n
.sym
->ts
;
16270 /* match_varspec might not know yet if it is seeing
16271 array reference or substring reference, as it doesn't
16273 if (e
->ref
&& e
->ref
->type
== REF_ARRAY
)
16275 gfc_ref
*ref
= e
->ref
;
16276 sym
= e
->symtree
->n
.sym
;
16278 if (sym
->attr
.dimension
)
16280 ref
->u
.ar
.as
= sym
->as
;
16284 /* For substrings, convert REF_ARRAY into REF_SUBSTRING. */
16285 if (e
->ts
.type
== BT_CHARACTER
16287 && ref
->type
== REF_ARRAY
16288 && ref
->u
.ar
.dimen
== 1
16289 && ref
->u
.ar
.dimen_type
[0] == DIMEN_RANGE
16290 && ref
->u
.ar
.stride
[0] == NULL
)
16292 gfc_expr
*start
= ref
->u
.ar
.start
[0];
16293 gfc_expr
*end
= ref
->u
.ar
.end
[0];
16296 /* Optimize away the (:) reference. */
16297 if (start
== NULL
&& end
== NULL
)
16300 e
->ref
= ref
->next
;
16302 e
->ref
->next
= ref
->next
;
16307 ref
->type
= REF_SUBSTRING
;
16309 start
= gfc_get_int_expr (gfc_charlen_int_kind
,
16311 ref
->u
.ss
.start
= start
;
16312 if (end
== NULL
&& e
->ts
.u
.cl
)
16313 end
= gfc_copy_expr (e
->ts
.u
.cl
->length
);
16314 ref
->u
.ss
.end
= end
;
16315 ref
->u
.ss
.length
= e
->ts
.u
.cl
;
16322 /* Any further ref is an error. */
16325 gcc_assert (ref
->type
== REF_ARRAY
);
16326 gfc_error ("Syntax error in EQUIVALENCE statement at %L",
16332 if (!gfc_resolve_expr (e
))
16335 sym
= e
->symtree
->n
.sym
;
16337 if (sym
->attr
.is_protected
)
16339 if (cnt_protected
> 0 && cnt_protected
!= object
)
16341 gfc_error ("Either all or none of the objects in the "
16342 "EQUIVALENCE set at %L shall have the "
16343 "PROTECTED attribute",
16348 /* Shall not equivalence common block variables in a PURE procedure. */
16349 if (sym
->ns
->proc_name
16350 && sym
->ns
->proc_name
->attr
.pure
16351 && sym
->attr
.in_common
)
16353 /* Need to check for symbols that may have entered the pure
16354 procedure via a USE statement. */
16355 bool saw_sym
= false;
16356 if (sym
->ns
->use_stmts
)
16359 for (r
= sym
->ns
->use_stmts
->rename
; r
; r
= r
->next
)
16360 if (strcmp(r
->use_name
, sym
->name
) == 0) saw_sym
= true;
16366 gfc_error ("COMMON block member %qs at %L cannot be an "
16367 "EQUIVALENCE object in the pure procedure %qs",
16368 sym
->name
, &e
->where
, sym
->ns
->proc_name
->name
);
16372 /* Shall not be a named constant. */
16373 if (e
->expr_type
== EXPR_CONSTANT
)
16375 gfc_error ("Named constant %qs at %L cannot be an EQUIVALENCE "
16376 "object", sym
->name
, &e
->where
);
16380 if (e
->ts
.type
== BT_DERIVED
16381 && !resolve_equivalence_derived (e
->ts
.u
.derived
, sym
, e
))
16384 /* Check that the types correspond correctly:
16386 A numeric sequence structure may be equivalenced to another sequence
16387 structure, an object of default integer type, default real type, double
16388 precision real type, default logical type such that components of the
16389 structure ultimately only become associated to objects of the same
16390 kind. A character sequence structure may be equivalenced to an object
16391 of default character kind or another character sequence structure.
16392 Other objects may be equivalenced only to objects of the same type and
16393 kind parameters. */
16395 /* Identical types are unconditionally OK. */
16396 if (object
== 1 || gfc_compare_types (last_ts
, &sym
->ts
))
16397 goto identical_types
;
16399 last_eq_type
= sequence_type (*last_ts
);
16400 eq_type
= sequence_type (sym
->ts
);
16402 /* Since the pair of objects is not of the same type, mixed or
16403 non-default sequences can be rejected. */
16405 msg
= "Sequence %s with mixed components in EQUIVALENCE "
16406 "statement at %L with different type objects";
16408 && last_eq_type
== SEQ_MIXED
16409 && !gfc_notify_std (GFC_STD_GNU
, msg
, first_sym
->name
, last_where
))
16410 || (eq_type
== SEQ_MIXED
16411 && !gfc_notify_std (GFC_STD_GNU
, msg
, sym
->name
, &e
->where
)))
16414 msg
= "Non-default type object or sequence %s in EQUIVALENCE "
16415 "statement at %L with objects of different type";
16417 && last_eq_type
== SEQ_NONDEFAULT
16418 && !gfc_notify_std (GFC_STD_GNU
, msg
, first_sym
->name
, last_where
))
16419 || (eq_type
== SEQ_NONDEFAULT
16420 && !gfc_notify_std (GFC_STD_GNU
, msg
, sym
->name
, &e
->where
)))
16423 msg
="Non-CHARACTER object %qs in default CHARACTER "
16424 "EQUIVALENCE statement at %L";
16425 if (last_eq_type
== SEQ_CHARACTER
16426 && eq_type
!= SEQ_CHARACTER
16427 && !gfc_notify_std (GFC_STD_GNU
, msg
, sym
->name
, &e
->where
))
16430 msg
="Non-NUMERIC object %qs in default NUMERIC "
16431 "EQUIVALENCE statement at %L";
16432 if (last_eq_type
== SEQ_NUMERIC
16433 && eq_type
!= SEQ_NUMERIC
16434 && !gfc_notify_std (GFC_STD_GNU
, msg
, sym
->name
, &e
->where
))
16439 last_where
= &e
->where
;
16444 /* Shall not be an automatic array. */
16445 if (e
->ref
->type
== REF_ARRAY
16446 && !gfc_resolve_array_spec (e
->ref
->u
.ar
.as
, 1))
16448 gfc_error ("Array %qs at %L with non-constant bounds cannot be "
16449 "an EQUIVALENCE object", sym
->name
, &e
->where
);
16456 /* Shall not be a structure component. */
16457 if (r
->type
== REF_COMPONENT
)
16459 gfc_error ("Structure component %qs at %L cannot be an "
16460 "EQUIVALENCE object",
16461 r
->u
.c
.component
->name
, &e
->where
);
16465 /* A substring shall not have length zero. */
16466 if (r
->type
== REF_SUBSTRING
)
16468 if (compare_bound (r
->u
.ss
.start
, r
->u
.ss
.end
) == CMP_GT
)
16470 gfc_error ("Substring at %L has length zero",
16471 &r
->u
.ss
.start
->where
);
16481 /* Function called by resolve_fntype to flag other symbol used in the
16482 length type parameter specification of function resuls. */
16485 flag_fn_result_spec (gfc_expr
*expr
,
16487 int *f ATTRIBUTE_UNUSED
)
16492 if (expr
->expr_type
== EXPR_VARIABLE
)
16494 s
= expr
->symtree
->n
.sym
;
16495 for (ns
= s
->ns
; ns
; ns
= ns
->parent
)
16501 gfc_error ("Self reference in character length expression "
16502 "for %qs at %L", sym
->name
, &expr
->where
);
16506 if (!s
->fn_result_spec
16507 && s
->attr
.flavor
== FL_PARAMETER
)
16509 /* Function contained in a module.... */
16510 if (ns
->proc_name
&& ns
->proc_name
->attr
.flavor
== FL_MODULE
)
16513 s
->fn_result_spec
= 1;
16514 /* Make sure that this symbol is translated as a module
16516 st
= gfc_get_unique_symtree (ns
);
16520 /* ... which is use associated and called. */
16521 else if (s
->attr
.use_assoc
|| s
->attr
.used_in_submodule
16523 /* External function matched with an interface. */
16526 && s
->ns
->proc_name
->attr
.if_source
== IFSRC_DECL
)
16527 || s
->ns
->proc_name
->attr
.if_source
== IFSRC_IFBODY
)
16528 && s
->ns
->proc_name
->attr
.function
))
16529 s
->fn_result_spec
= 1;
16536 /* Resolve function and ENTRY types, issue diagnostics if needed. */
16539 resolve_fntype (gfc_namespace
*ns
)
16541 gfc_entry_list
*el
;
16544 if (ns
->proc_name
== NULL
|| !ns
->proc_name
->attr
.function
)
16547 /* If there are any entries, ns->proc_name is the entry master
16548 synthetic symbol and ns->entries->sym actual FUNCTION symbol. */
16550 sym
= ns
->entries
->sym
;
16552 sym
= ns
->proc_name
;
16553 if (sym
->result
== sym
16554 && sym
->ts
.type
== BT_UNKNOWN
16555 && !gfc_set_default_type (sym
, 0, NULL
)
16556 && !sym
->attr
.untyped
)
16558 gfc_error ("Function %qs at %L has no IMPLICIT type",
16559 sym
->name
, &sym
->declared_at
);
16560 sym
->attr
.untyped
= 1;
16563 if (sym
->ts
.type
== BT_DERIVED
&& !sym
->ts
.u
.derived
->attr
.use_assoc
16564 && !sym
->attr
.contained
16565 && !gfc_check_symbol_access (sym
->ts
.u
.derived
)
16566 && gfc_check_symbol_access (sym
))
16568 gfc_notify_std (GFC_STD_F2003
, "PUBLIC function %qs at "
16569 "%L of PRIVATE type %qs", sym
->name
,
16570 &sym
->declared_at
, sym
->ts
.u
.derived
->name
);
16574 for (el
= ns
->entries
->next
; el
; el
= el
->next
)
16576 if (el
->sym
->result
== el
->sym
16577 && el
->sym
->ts
.type
== BT_UNKNOWN
16578 && !gfc_set_default_type (el
->sym
, 0, NULL
)
16579 && !el
->sym
->attr
.untyped
)
16581 gfc_error ("ENTRY %qs at %L has no IMPLICIT type",
16582 el
->sym
->name
, &el
->sym
->declared_at
);
16583 el
->sym
->attr
.untyped
= 1;
16587 if (sym
->ts
.type
== BT_CHARACTER
)
16588 gfc_traverse_expr (sym
->ts
.u
.cl
->length
, sym
, flag_fn_result_spec
, 0);
16592 /* 12.3.2.1.1 Defined operators. */
16595 check_uop_procedure (gfc_symbol
*sym
, locus where
)
16597 gfc_formal_arglist
*formal
;
16599 if (!sym
->attr
.function
)
16601 gfc_error ("User operator procedure %qs at %L must be a FUNCTION",
16602 sym
->name
, &where
);
16606 if (sym
->ts
.type
== BT_CHARACTER
16607 && !((sym
->ts
.u
.cl
&& sym
->ts
.u
.cl
->length
) || sym
->ts
.deferred
)
16608 && !(sym
->result
&& ((sym
->result
->ts
.u
.cl
16609 && sym
->result
->ts
.u
.cl
->length
) || sym
->result
->ts
.deferred
)))
16611 gfc_error ("User operator procedure %qs at %L cannot be assumed "
16612 "character length", sym
->name
, &where
);
16616 formal
= gfc_sym_get_dummy_args (sym
);
16617 if (!formal
|| !formal
->sym
)
16619 gfc_error ("User operator procedure %qs at %L must have at least "
16620 "one argument", sym
->name
, &where
);
16624 if (formal
->sym
->attr
.intent
!= INTENT_IN
)
16626 gfc_error ("First argument of operator interface at %L must be "
16627 "INTENT(IN)", &where
);
16631 if (formal
->sym
->attr
.optional
)
16633 gfc_error ("First argument of operator interface at %L cannot be "
16634 "optional", &where
);
16638 formal
= formal
->next
;
16639 if (!formal
|| !formal
->sym
)
16642 if (formal
->sym
->attr
.intent
!= INTENT_IN
)
16644 gfc_error ("Second argument of operator interface at %L must be "
16645 "INTENT(IN)", &where
);
16649 if (formal
->sym
->attr
.optional
)
16651 gfc_error ("Second argument of operator interface at %L cannot be "
16652 "optional", &where
);
16658 gfc_error ("Operator interface at %L must have, at most, two "
16659 "arguments", &where
);
16667 gfc_resolve_uops (gfc_symtree
*symtree
)
16669 gfc_interface
*itr
;
16671 if (symtree
== NULL
)
16674 gfc_resolve_uops (symtree
->left
);
16675 gfc_resolve_uops (symtree
->right
);
16677 for (itr
= symtree
->n
.uop
->op
; itr
; itr
= itr
->next
)
16678 check_uop_procedure (itr
->sym
, itr
->sym
->declared_at
);
16682 /* Examine all of the expressions associated with a program unit,
16683 assign types to all intermediate expressions, make sure that all
16684 assignments are to compatible types and figure out which names
16685 refer to which functions or subroutines. It doesn't check code
16686 block, which is handled by gfc_resolve_code. */
16689 resolve_types (gfc_namespace
*ns
)
16695 gfc_namespace
* old_ns
= gfc_current_ns
;
16697 if (ns
->types_resolved
)
16700 /* Check that all IMPLICIT types are ok. */
16701 if (!ns
->seen_implicit_none
)
16704 for (letter
= 0; letter
!= GFC_LETTERS
; ++letter
)
16705 if (ns
->set_flag
[letter
]
16706 && !resolve_typespec_used (&ns
->default_type
[letter
],
16707 &ns
->implicit_loc
[letter
], NULL
))
16711 gfc_current_ns
= ns
;
16713 resolve_entries (ns
);
16715 resolve_common_vars (&ns
->blank_common
, false);
16716 resolve_common_blocks (ns
->common_root
);
16718 resolve_contained_functions (ns
);
16720 if (ns
->proc_name
&& ns
->proc_name
->attr
.flavor
== FL_PROCEDURE
16721 && ns
->proc_name
->attr
.if_source
== IFSRC_IFBODY
)
16722 resolve_formal_arglist (ns
->proc_name
);
16724 gfc_traverse_ns (ns
, resolve_bind_c_derived_types
);
16726 for (cl
= ns
->cl_list
; cl
; cl
= cl
->next
)
16727 resolve_charlen (cl
);
16729 gfc_traverse_ns (ns
, resolve_symbol
);
16731 resolve_fntype (ns
);
16733 for (n
= ns
->contained
; n
; n
= n
->sibling
)
16735 if (gfc_pure (ns
->proc_name
) && !gfc_pure (n
->proc_name
))
16736 gfc_error ("Contained procedure %qs at %L of a PURE procedure must "
16737 "also be PURE", n
->proc_name
->name
,
16738 &n
->proc_name
->declared_at
);
16744 gfc_do_concurrent_flag
= 0;
16745 gfc_check_interfaces (ns
);
16747 gfc_traverse_ns (ns
, resolve_values
);
16749 if (ns
->save_all
|| !flag_automatic
)
16753 for (d
= ns
->data
; d
; d
= d
->next
)
16757 gfc_traverse_ns (ns
, gfc_formalize_init_value
);
16759 gfc_traverse_ns (ns
, gfc_verify_binding_labels
);
16761 for (eq
= ns
->equiv
; eq
; eq
= eq
->next
)
16762 resolve_equivalence (eq
);
16764 /* Warn about unused labels. */
16765 if (warn_unused_label
)
16766 warn_unused_fortran_label (ns
->st_labels
);
16768 gfc_resolve_uops (ns
->uop_root
);
16770 gfc_traverse_ns (ns
, gfc_verify_DTIO_procedures
);
16772 gfc_resolve_omp_declare_simd (ns
);
16774 gfc_resolve_omp_udrs (ns
->omp_udr_root
);
16776 ns
->types_resolved
= 1;
16778 gfc_current_ns
= old_ns
;
16782 /* Call gfc_resolve_code recursively. */
16785 resolve_codes (gfc_namespace
*ns
)
16788 bitmap_obstack old_obstack
;
16790 if (ns
->resolved
== 1)
16793 for (n
= ns
->contained
; n
; n
= n
->sibling
)
16796 gfc_current_ns
= ns
;
16798 /* Don't clear 'cs_base' if this is the namespace of a BLOCK construct. */
16799 if (!(ns
->proc_name
&& ns
->proc_name
->attr
.flavor
== FL_LABEL
))
16802 /* Set to an out of range value. */
16803 current_entry_id
= -1;
16805 old_obstack
= labels_obstack
;
16806 bitmap_obstack_initialize (&labels_obstack
);
16808 gfc_resolve_oacc_declare (ns
);
16809 gfc_resolve_omp_local_vars (ns
);
16810 gfc_resolve_code (ns
->code
, ns
);
16812 bitmap_obstack_release (&labels_obstack
);
16813 labels_obstack
= old_obstack
;
16817 /* This function is called after a complete program unit has been compiled.
16818 Its purpose is to examine all of the expressions associated with a program
16819 unit, assign types to all intermediate expressions, make sure that all
16820 assignments are to compatible types and figure out which names refer to
16821 which functions or subroutines. */
16824 gfc_resolve (gfc_namespace
*ns
)
16826 gfc_namespace
*old_ns
;
16827 code_stack
*old_cs_base
;
16828 struct gfc_omp_saved_state old_omp_state
;
16834 old_ns
= gfc_current_ns
;
16835 old_cs_base
= cs_base
;
16837 /* As gfc_resolve can be called during resolution of an OpenMP construct
16838 body, we should clear any state associated to it, so that say NS's
16839 DO loops are not interpreted as OpenMP loops. */
16840 if (!ns
->construct_entities
)
16841 gfc_omp_save_and_clear_state (&old_omp_state
);
16843 resolve_types (ns
);
16844 component_assignment_level
= 0;
16845 resolve_codes (ns
);
16847 gfc_current_ns
= old_ns
;
16848 cs_base
= old_cs_base
;
16851 gfc_run_passes (ns
);
16853 if (!ns
->construct_entities
)
16854 gfc_omp_restore_state (&old_omp_state
);