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
, false);
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
, true);
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
,
2491 sym
->binding_label
!= NULL
);
2493 if ((gsym
->type
!= GSYM_UNKNOWN
&& gsym
->type
!= type
))
2494 gfc_global_used (gsym
, where
);
2496 if ((sym
->attr
.if_source
== IFSRC_UNKNOWN
2497 || sym
->attr
.if_source
== IFSRC_IFBODY
)
2498 && gsym
->type
!= GSYM_UNKNOWN
2499 && !gsym
->binding_label
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
;
2506 def_sym
= gsym
->ns
->proc_name
;
2508 if (gsym
->ns
->resolved
!= -1)
2511 /* Resolve the gsymbol namespace if needed. */
2512 if (!gsym
->ns
->resolved
)
2514 gfc_symbol
*old_dt_list
;
2516 /* Stash away derived types so that the backend_decls
2517 do not get mixed up. */
2518 old_dt_list
= gfc_derived_types
;
2519 gfc_derived_types
= NULL
;
2521 gfc_resolve (gsym
->ns
);
2523 /* Store the new derived types with the global namespace. */
2524 if (gfc_derived_types
)
2525 gsym
->ns
->derived_types
= gfc_derived_types
;
2527 /* Restore the derived types of this namespace. */
2528 gfc_derived_types
= old_dt_list
;
2531 /* Make sure that translation for the gsymbol occurs before
2532 the procedure currently being resolved. */
2533 ns
= gfc_global_ns_list
;
2534 for (; ns
&& ns
!= gsym
->ns
; ns
= ns
->sibling
)
2536 if (ns
->sibling
== gsym
->ns
)
2538 ns
->sibling
= gsym
->ns
->sibling
;
2539 gsym
->ns
->sibling
= gfc_global_ns_list
;
2540 gfc_global_ns_list
= gsym
->ns
;
2545 /* This can happen if a binding name has been specified. */
2546 if (gsym
->binding_label
&& gsym
->sym_name
!= def_sym
->name
)
2547 gfc_find_symbol (gsym
->sym_name
, gsym
->ns
, 0, &def_sym
);
2549 if (def_sym
->attr
.entry_master
|| def_sym
->attr
.entry
)
2551 gfc_entry_list
*entry
;
2552 for (entry
= gsym
->ns
->entries
; entry
; entry
= entry
->next
)
2553 if (strcmp (entry
->sym
->name
, sym
->name
) == 0)
2555 def_sym
= entry
->sym
;
2561 if (sym
->attr
.function
&& !gfc_compare_types (&sym
->ts
, &def_sym
->ts
))
2563 gfc_error ("Return type mismatch of function %qs at %L (%s/%s)",
2564 sym
->name
, &sym
->declared_at
, gfc_typename (&sym
->ts
),
2565 gfc_typename (&def_sym
->ts
));
2569 if (sym
->attr
.if_source
== IFSRC_UNKNOWN
2570 && gfc_explicit_interface_required (def_sym
, reason
, sizeof(reason
)))
2572 gfc_error ("Explicit interface required for %qs at %L: %s",
2573 sym
->name
, &sym
->declared_at
, reason
);
2577 if (!pedantic
&& (gfc_option
.allow_std
& GFC_STD_GNU
))
2578 /* Turn erros into warnings with -std=gnu and -std=legacy. */
2579 gfc_errors_to_warnings (true);
2581 if (!gfc_compare_interfaces (sym
, def_sym
, sym
->name
, 0, 1,
2582 reason
, sizeof(reason
), NULL
, NULL
))
2584 gfc_error_opt (OPT_Wargument_mismatch
,
2585 "Interface mismatch in global procedure %qs at %L:"
2586 " %s", sym
->name
, &sym
->declared_at
, reason
);
2591 || ((gfc_option
.warn_std
& GFC_STD_LEGACY
)
2592 && !(gfc_option
.warn_std
& GFC_STD_GNU
)))
2593 gfc_errors_to_warnings (true);
2595 if (sym
->attr
.if_source
!= IFSRC_IFBODY
)
2596 gfc_procedure_use (def_sym
, actual
, where
);
2600 gfc_errors_to_warnings (false);
2602 if (gsym
->type
== GSYM_UNKNOWN
)
2605 gsym
->where
= *where
;
2612 /************* Function resolution *************/
2614 /* Resolve a function call known to be generic.
2615 Section 14.1.2.4.1. */
2618 resolve_generic_f0 (gfc_expr
*expr
, gfc_symbol
*sym
)
2622 if (sym
->attr
.generic
)
2624 s
= gfc_search_interface (sym
->generic
, 0, &expr
->value
.function
.actual
);
2627 expr
->value
.function
.name
= s
->name
;
2628 expr
->value
.function
.esym
= s
;
2630 if (s
->ts
.type
!= BT_UNKNOWN
)
2632 else if (s
->result
!= NULL
&& s
->result
->ts
.type
!= BT_UNKNOWN
)
2633 expr
->ts
= s
->result
->ts
;
2636 expr
->rank
= s
->as
->rank
;
2637 else if (s
->result
!= NULL
&& s
->result
->as
!= NULL
)
2638 expr
->rank
= s
->result
->as
->rank
;
2640 gfc_set_sym_referenced (expr
->value
.function
.esym
);
2645 /* TODO: Need to search for elemental references in generic
2649 if (sym
->attr
.intrinsic
)
2650 return gfc_intrinsic_func_interface (expr
, 0);
2657 resolve_generic_f (gfc_expr
*expr
)
2661 gfc_interface
*intr
= NULL
;
2663 sym
= expr
->symtree
->n
.sym
;
2667 m
= resolve_generic_f0 (expr
, sym
);
2670 else if (m
== MATCH_ERROR
)
2675 for (intr
= sym
->generic
; intr
; intr
= intr
->next
)
2676 if (gfc_fl_struct (intr
->sym
->attr
.flavor
))
2679 if (sym
->ns
->parent
== NULL
)
2681 gfc_find_symbol (sym
->name
, sym
->ns
->parent
, 1, &sym
);
2685 if (!generic_sym (sym
))
2689 /* Last ditch attempt. See if the reference is to an intrinsic
2690 that possesses a matching interface. 14.1.2.4 */
2691 if (sym
&& !intr
&& !gfc_is_intrinsic (sym
, 0, expr
->where
))
2693 if (gfc_init_expr_flag
)
2694 gfc_error ("Function %qs in initialization expression at %L "
2695 "must be an intrinsic function",
2696 expr
->symtree
->n
.sym
->name
, &expr
->where
);
2698 gfc_error ("There is no specific function for the generic %qs "
2699 "at %L", expr
->symtree
->n
.sym
->name
, &expr
->where
);
2705 if (!gfc_convert_to_structure_constructor (expr
, intr
->sym
, NULL
,
2708 if (!gfc_use_derived (expr
->ts
.u
.derived
))
2710 return resolve_structure_cons (expr
, 0);
2713 m
= gfc_intrinsic_func_interface (expr
, 0);
2718 gfc_error ("Generic function %qs at %L is not consistent with a "
2719 "specific intrinsic interface", expr
->symtree
->n
.sym
->name
,
2726 /* Resolve a function call known to be specific. */
2729 resolve_specific_f0 (gfc_symbol
*sym
, gfc_expr
*expr
)
2733 if (sym
->attr
.external
|| sym
->attr
.if_source
== IFSRC_IFBODY
)
2735 if (sym
->attr
.dummy
)
2737 sym
->attr
.proc
= PROC_DUMMY
;
2741 sym
->attr
.proc
= PROC_EXTERNAL
;
2745 if (sym
->attr
.proc
== PROC_MODULE
2746 || sym
->attr
.proc
== PROC_ST_FUNCTION
2747 || sym
->attr
.proc
== PROC_INTERNAL
)
2750 if (sym
->attr
.intrinsic
)
2752 m
= gfc_intrinsic_func_interface (expr
, 1);
2756 gfc_error ("Function %qs at %L is INTRINSIC but is not compatible "
2757 "with an intrinsic", sym
->name
, &expr
->where
);
2765 gfc_procedure_use (sym
, &expr
->value
.function
.actual
, &expr
->where
);
2768 expr
->ts
= sym
->result
->ts
;
2771 expr
->value
.function
.name
= sym
->name
;
2772 expr
->value
.function
.esym
= sym
;
2773 /* Prevent crash when sym->ts.u.derived->components is not set due to previous
2775 if (sym
->ts
.type
== BT_CLASS
&& !CLASS_DATA (sym
))
2777 if (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
)->as
)
2778 expr
->rank
= CLASS_DATA (sym
)->as
->rank
;
2779 else if (sym
->as
!= NULL
)
2780 expr
->rank
= sym
->as
->rank
;
2787 resolve_specific_f (gfc_expr
*expr
)
2792 sym
= expr
->symtree
->n
.sym
;
2796 m
= resolve_specific_f0 (sym
, expr
);
2799 if (m
== MATCH_ERROR
)
2802 if (sym
->ns
->parent
== NULL
)
2805 gfc_find_symbol (sym
->name
, sym
->ns
->parent
, 1, &sym
);
2811 gfc_error ("Unable to resolve the specific function %qs at %L",
2812 expr
->symtree
->n
.sym
->name
, &expr
->where
);
2817 /* Recursively append candidate SYM to CANDIDATES. Store the number of
2818 candidates in CANDIDATES_LEN. */
2821 lookup_function_fuzzy_find_candidates (gfc_symtree
*sym
,
2823 size_t &candidates_len
)
2829 if ((sym
->n
.sym
->ts
.type
!= BT_UNKNOWN
|| sym
->n
.sym
->attr
.external
)
2830 && sym
->n
.sym
->attr
.flavor
== FL_PROCEDURE
)
2831 vec_push (candidates
, candidates_len
, sym
->name
);
2835 lookup_function_fuzzy_find_candidates (p
, candidates
, candidates_len
);
2839 lookup_function_fuzzy_find_candidates (p
, candidates
, candidates_len
);
2843 /* Lookup function FN fuzzily, taking names in SYMROOT into account. */
2846 gfc_lookup_function_fuzzy (const char *fn
, gfc_symtree
*symroot
)
2848 char **candidates
= NULL
;
2849 size_t candidates_len
= 0;
2850 lookup_function_fuzzy_find_candidates (symroot
, candidates
, candidates_len
);
2851 return gfc_closest_fuzzy_match (fn
, candidates
);
2855 /* Resolve a procedure call not known to be generic nor specific. */
2858 resolve_unknown_f (gfc_expr
*expr
)
2863 sym
= expr
->symtree
->n
.sym
;
2865 if (sym
->attr
.dummy
)
2867 sym
->attr
.proc
= PROC_DUMMY
;
2868 expr
->value
.function
.name
= sym
->name
;
2872 /* See if we have an intrinsic function reference. */
2874 if (gfc_is_intrinsic (sym
, 0, expr
->where
))
2876 if (gfc_intrinsic_func_interface (expr
, 1) == MATCH_YES
)
2881 /* The reference is to an external name. */
2883 sym
->attr
.proc
= PROC_EXTERNAL
;
2884 expr
->value
.function
.name
= sym
->name
;
2885 expr
->value
.function
.esym
= expr
->symtree
->n
.sym
;
2887 if (sym
->as
!= NULL
)
2888 expr
->rank
= sym
->as
->rank
;
2890 /* Type of the expression is either the type of the symbol or the
2891 default type of the symbol. */
2894 gfc_procedure_use (sym
, &expr
->value
.function
.actual
, &expr
->where
);
2896 if (sym
->ts
.type
!= BT_UNKNOWN
)
2900 ts
= gfc_get_default_type (sym
->name
, sym
->ns
);
2902 if (ts
->type
== BT_UNKNOWN
)
2905 = gfc_lookup_function_fuzzy (sym
->name
, sym
->ns
->sym_root
);
2907 gfc_error ("Function %qs at %L has no IMPLICIT type"
2908 "; did you mean %qs?",
2909 sym
->name
, &expr
->where
, guessed
);
2911 gfc_error ("Function %qs at %L has no IMPLICIT type",
2912 sym
->name
, &expr
->where
);
2923 /* Return true, if the symbol is an external procedure. */
2925 is_external_proc (gfc_symbol
*sym
)
2927 if (!sym
->attr
.dummy
&& !sym
->attr
.contained
2928 && !gfc_is_intrinsic (sym
, sym
->attr
.subroutine
, sym
->declared_at
)
2929 && sym
->attr
.proc
!= PROC_ST_FUNCTION
2930 && !sym
->attr
.proc_pointer
2931 && !sym
->attr
.use_assoc
2939 /* Figure out if a function reference is pure or not. Also set the name
2940 of the function for a potential error message. Return nonzero if the
2941 function is PURE, zero if not. */
2943 pure_stmt_function (gfc_expr
*, gfc_symbol
*);
2946 gfc_pure_function (gfc_expr
*e
, const char **name
)
2949 gfc_component
*comp
;
2953 if (e
->symtree
!= NULL
2954 && e
->symtree
->n
.sym
!= NULL
2955 && e
->symtree
->n
.sym
->attr
.proc
== PROC_ST_FUNCTION
)
2956 return pure_stmt_function (e
, e
->symtree
->n
.sym
);
2958 comp
= gfc_get_proc_ptr_comp (e
);
2961 pure
= gfc_pure (comp
->ts
.interface
);
2964 else if (e
->value
.function
.esym
)
2966 pure
= gfc_pure (e
->value
.function
.esym
);
2967 *name
= e
->value
.function
.esym
->name
;
2969 else if (e
->value
.function
.isym
)
2971 pure
= e
->value
.function
.isym
->pure
2972 || e
->value
.function
.isym
->elemental
;
2973 *name
= e
->value
.function
.isym
->name
;
2977 /* Implicit functions are not pure. */
2979 *name
= e
->value
.function
.name
;
2986 /* Check if the expression is a reference to an implicitly pure function. */
2989 gfc_implicit_pure_function (gfc_expr
*e
)
2991 gfc_component
*comp
= gfc_get_proc_ptr_comp (e
);
2993 return gfc_implicit_pure (comp
->ts
.interface
);
2994 else if (e
->value
.function
.esym
)
2995 return gfc_implicit_pure (e
->value
.function
.esym
);
3002 impure_stmt_fcn (gfc_expr
*e
, gfc_symbol
*sym
,
3003 int *f ATTRIBUTE_UNUSED
)
3007 /* Don't bother recursing into other statement functions
3008 since they will be checked individually for purity. */
3009 if (e
->expr_type
!= EXPR_FUNCTION
3011 || e
->symtree
->n
.sym
== sym
3012 || e
->symtree
->n
.sym
->attr
.proc
== PROC_ST_FUNCTION
)
3015 return gfc_pure_function (e
, &name
) ? false : true;
3020 pure_stmt_function (gfc_expr
*e
, gfc_symbol
*sym
)
3022 return gfc_traverse_expr (e
, sym
, impure_stmt_fcn
, 0) ? 0 : 1;
3026 /* Check if an impure function is allowed in the current context. */
3028 static bool check_pure_function (gfc_expr
*e
)
3030 const char *name
= NULL
;
3031 if (!gfc_pure_function (e
, &name
) && name
)
3035 gfc_error ("Reference to impure function %qs at %L inside a "
3036 "FORALL %s", name
, &e
->where
,
3037 forall_flag
== 2 ? "mask" : "block");
3040 else if (gfc_do_concurrent_flag
)
3042 gfc_error ("Reference to impure function %qs at %L inside a "
3043 "DO CONCURRENT %s", name
, &e
->where
,
3044 gfc_do_concurrent_flag
== 2 ? "mask" : "block");
3047 else if (gfc_pure (NULL
))
3049 gfc_error ("Reference to impure function %qs at %L "
3050 "within a PURE procedure", name
, &e
->where
);
3053 if (!gfc_implicit_pure_function (e
))
3054 gfc_unset_implicit_pure (NULL
);
3060 /* Update current procedure's array_outer_dependency flag, considering
3061 a call to procedure SYM. */
3064 update_current_proc_array_outer_dependency (gfc_symbol
*sym
)
3066 /* Check to see if this is a sibling function that has not yet
3068 gfc_namespace
*sibling
= gfc_current_ns
->sibling
;
3069 for (; sibling
; sibling
= sibling
->sibling
)
3071 if (sibling
->proc_name
== sym
)
3073 gfc_resolve (sibling
);
3078 /* If SYM has references to outer arrays, so has the procedure calling
3079 SYM. If SYM is a procedure pointer, we can assume the worst. */
3080 if ((sym
->attr
.array_outer_dependency
|| sym
->attr
.proc_pointer
)
3081 && gfc_current_ns
->proc_name
)
3082 gfc_current_ns
->proc_name
->attr
.array_outer_dependency
= 1;
3086 /* Resolve a function call, which means resolving the arguments, then figuring
3087 out which entity the name refers to. */
3090 resolve_function (gfc_expr
*expr
)
3092 gfc_actual_arglist
*arg
;
3096 procedure_type p
= PROC_INTRINSIC
;
3097 bool no_formal_args
;
3101 sym
= expr
->symtree
->n
.sym
;
3103 /* If this is a procedure pointer component, it has already been resolved. */
3104 if (gfc_is_proc_ptr_comp (expr
))
3107 /* Avoid re-resolving the arguments of caf_get, which can lead to inserting
3109 if (sym
&& sym
->attr
.intrinsic
3110 && (sym
->intmod_sym_id
== GFC_ISYM_CAF_GET
3111 || sym
->intmod_sym_id
== GFC_ISYM_CAF_SEND
))
3114 if (sym
&& sym
->attr
.intrinsic
3115 && !gfc_resolve_intrinsic (sym
, &expr
->where
))
3118 if (sym
&& (sym
->attr
.flavor
== FL_VARIABLE
|| sym
->attr
.subroutine
))
3120 gfc_error ("%qs at %L is not a function", sym
->name
, &expr
->where
);
3124 /* If this is a deferred TBP with an abstract interface (which may
3125 of course be referenced), expr->value.function.esym will be set. */
3126 if (sym
&& sym
->attr
.abstract
&& !expr
->value
.function
.esym
)
3128 gfc_error ("ABSTRACT INTERFACE %qs must not be referenced at %L",
3129 sym
->name
, &expr
->where
);
3133 /* If this is a deferred TBP with an abstract interface, its result
3134 cannot be an assumed length character (F2003: C418). */
3135 if (sym
&& sym
->attr
.abstract
&& sym
->attr
.function
3136 && sym
->result
->ts
.u
.cl
3137 && sym
->result
->ts
.u
.cl
->length
== NULL
3138 && !sym
->result
->ts
.deferred
)
3140 gfc_error ("ABSTRACT INTERFACE %qs at %L must not have an assumed "
3141 "character length result (F2008: C418)", sym
->name
,
3146 /* Switch off assumed size checking and do this again for certain kinds
3147 of procedure, once the procedure itself is resolved. */
3148 need_full_assumed_size
++;
3150 if (expr
->symtree
&& expr
->symtree
->n
.sym
)
3151 p
= expr
->symtree
->n
.sym
->attr
.proc
;
3153 if (expr
->value
.function
.isym
&& expr
->value
.function
.isym
->inquiry
)
3154 inquiry_argument
= true;
3155 no_formal_args
= sym
&& is_external_proc (sym
)
3156 && gfc_sym_get_dummy_args (sym
) == NULL
;
3158 if (!resolve_actual_arglist (expr
->value
.function
.actual
,
3161 inquiry_argument
= false;
3165 inquiry_argument
= false;
3167 /* Resume assumed_size checking. */
3168 need_full_assumed_size
--;
3170 /* If the procedure is external, check for usage. */
3171 if (sym
&& is_external_proc (sym
))
3172 resolve_global_procedure (sym
, &expr
->where
,
3173 &expr
->value
.function
.actual
, 0);
3175 if (sym
&& sym
->ts
.type
== BT_CHARACTER
3177 && sym
->ts
.u
.cl
->length
== NULL
3179 && !sym
->ts
.deferred
3180 && expr
->value
.function
.esym
== NULL
3181 && !sym
->attr
.contained
)
3183 /* Internal procedures are taken care of in resolve_contained_fntype. */
3184 gfc_error ("Function %qs is declared CHARACTER(*) and cannot "
3185 "be used at %L since it is not a dummy argument",
3186 sym
->name
, &expr
->where
);
3190 /* See if function is already resolved. */
3192 if (expr
->value
.function
.name
!= NULL
3193 || expr
->value
.function
.isym
!= NULL
)
3195 if (expr
->ts
.type
== BT_UNKNOWN
)
3201 /* Apply the rules of section 14.1.2. */
3203 switch (procedure_kind (sym
))
3206 t
= resolve_generic_f (expr
);
3209 case PTYPE_SPECIFIC
:
3210 t
= resolve_specific_f (expr
);
3214 t
= resolve_unknown_f (expr
);
3218 gfc_internal_error ("resolve_function(): bad function type");
3222 /* If the expression is still a function (it might have simplified),
3223 then we check to see if we are calling an elemental function. */
3225 if (expr
->expr_type
!= EXPR_FUNCTION
)
3228 temp
= need_full_assumed_size
;
3229 need_full_assumed_size
= 0;
3231 if (!resolve_elemental_actual (expr
, NULL
))
3234 if (omp_workshare_flag
3235 && expr
->value
.function
.esym
3236 && ! gfc_elemental (expr
->value
.function
.esym
))
3238 gfc_error ("User defined non-ELEMENTAL function %qs at %L not allowed "
3239 "in WORKSHARE construct", expr
->value
.function
.esym
->name
,
3244 #define GENERIC_ID expr->value.function.isym->id
3245 else if (expr
->value
.function
.actual
!= NULL
3246 && expr
->value
.function
.isym
!= NULL
3247 && GENERIC_ID
!= GFC_ISYM_LBOUND
3248 && GENERIC_ID
!= GFC_ISYM_LCOBOUND
3249 && GENERIC_ID
!= GFC_ISYM_UCOBOUND
3250 && GENERIC_ID
!= GFC_ISYM_LEN
3251 && GENERIC_ID
!= GFC_ISYM_LOC
3252 && GENERIC_ID
!= GFC_ISYM_C_LOC
3253 && GENERIC_ID
!= GFC_ISYM_PRESENT
)
3255 /* Array intrinsics must also have the last upper bound of an
3256 assumed size array argument. UBOUND and SIZE have to be
3257 excluded from the check if the second argument is anything
3260 for (arg
= expr
->value
.function
.actual
; arg
; arg
= arg
->next
)
3262 if ((GENERIC_ID
== GFC_ISYM_UBOUND
|| GENERIC_ID
== GFC_ISYM_SIZE
)
3263 && arg
== expr
->value
.function
.actual
3264 && arg
->next
!= NULL
&& arg
->next
->expr
)
3266 if (arg
->next
->expr
->expr_type
!= EXPR_CONSTANT
)
3269 if (arg
->next
->name
&& strcmp (arg
->next
->name
, "kind") == 0)
3272 if ((int)mpz_get_si (arg
->next
->expr
->value
.integer
)
3277 if (arg
->expr
!= NULL
3278 && arg
->expr
->rank
> 0
3279 && resolve_assumed_size_actual (arg
->expr
))
3285 need_full_assumed_size
= temp
;
3287 if (!check_pure_function(expr
))
3290 /* Functions without the RECURSIVE attribution are not allowed to
3291 * call themselves. */
3292 if (expr
->value
.function
.esym
&& !expr
->value
.function
.esym
->attr
.recursive
)
3295 esym
= expr
->value
.function
.esym
;
3297 if (is_illegal_recursion (esym
, gfc_current_ns
))
3299 if (esym
->attr
.entry
&& esym
->ns
->entries
)
3300 gfc_error ("ENTRY %qs at %L cannot be called recursively, as"
3301 " function %qs is not RECURSIVE",
3302 esym
->name
, &expr
->where
, esym
->ns
->entries
->sym
->name
);
3304 gfc_error ("Function %qs at %L cannot be called recursively, as it"
3305 " is not RECURSIVE", esym
->name
, &expr
->where
);
3311 /* Character lengths of use associated functions may contains references to
3312 symbols not referenced from the current program unit otherwise. Make sure
3313 those symbols are marked as referenced. */
3315 if (expr
->ts
.type
== BT_CHARACTER
&& expr
->value
.function
.esym
3316 && expr
->value
.function
.esym
->attr
.use_assoc
)
3318 gfc_expr_set_symbols_referenced (expr
->ts
.u
.cl
->length
);
3321 /* Make sure that the expression has a typespec that works. */
3322 if (expr
->ts
.type
== BT_UNKNOWN
)
3324 if (expr
->symtree
->n
.sym
->result
3325 && expr
->symtree
->n
.sym
->result
->ts
.type
!= BT_UNKNOWN
3326 && !expr
->symtree
->n
.sym
->result
->attr
.proc_pointer
)
3327 expr
->ts
= expr
->symtree
->n
.sym
->result
->ts
;
3330 if (!expr
->ref
&& !expr
->value
.function
.isym
)
3332 if (expr
->value
.function
.esym
)
3333 update_current_proc_array_outer_dependency (expr
->value
.function
.esym
);
3335 update_current_proc_array_outer_dependency (sym
);
3338 /* typebound procedure: Assume the worst. */
3339 gfc_current_ns
->proc_name
->attr
.array_outer_dependency
= 1;
3345 /************* Subroutine resolution *************/
3348 pure_subroutine (gfc_symbol
*sym
, const char *name
, locus
*loc
)
3355 gfc_error ("Subroutine call to %qs in FORALL block at %L is not PURE",
3359 else if (gfc_do_concurrent_flag
)
3361 gfc_error ("Subroutine call to %qs in DO CONCURRENT block at %L is not "
3365 else if (gfc_pure (NULL
))
3367 gfc_error ("Subroutine call to %qs at %L is not PURE", name
, loc
);
3371 gfc_unset_implicit_pure (NULL
);
3377 resolve_generic_s0 (gfc_code
*c
, gfc_symbol
*sym
)
3381 if (sym
->attr
.generic
)
3383 s
= gfc_search_interface (sym
->generic
, 1, &c
->ext
.actual
);
3386 c
->resolved_sym
= s
;
3387 if (!pure_subroutine (s
, s
->name
, &c
->loc
))
3392 /* TODO: Need to search for elemental references in generic interface. */
3395 if (sym
->attr
.intrinsic
)
3396 return gfc_intrinsic_sub_interface (c
, 0);
3403 resolve_generic_s (gfc_code
*c
)
3408 sym
= c
->symtree
->n
.sym
;
3412 m
= resolve_generic_s0 (c
, sym
);
3415 else if (m
== MATCH_ERROR
)
3419 if (sym
->ns
->parent
== NULL
)
3421 gfc_find_symbol (sym
->name
, sym
->ns
->parent
, 1, &sym
);
3425 if (!generic_sym (sym
))
3429 /* Last ditch attempt. See if the reference is to an intrinsic
3430 that possesses a matching interface. 14.1.2.4 */
3431 sym
= c
->symtree
->n
.sym
;
3433 if (!gfc_is_intrinsic (sym
, 1, c
->loc
))
3435 gfc_error ("There is no specific subroutine for the generic %qs at %L",
3436 sym
->name
, &c
->loc
);
3440 m
= gfc_intrinsic_sub_interface (c
, 0);
3444 gfc_error ("Generic subroutine %qs at %L is not consistent with an "
3445 "intrinsic subroutine interface", sym
->name
, &c
->loc
);
3451 /* Resolve a subroutine call known to be specific. */
3454 resolve_specific_s0 (gfc_code
*c
, gfc_symbol
*sym
)
3458 if (sym
->attr
.external
|| sym
->attr
.if_source
== IFSRC_IFBODY
)
3460 if (sym
->attr
.dummy
)
3462 sym
->attr
.proc
= PROC_DUMMY
;
3466 sym
->attr
.proc
= PROC_EXTERNAL
;
3470 if (sym
->attr
.proc
== PROC_MODULE
|| sym
->attr
.proc
== PROC_INTERNAL
)
3473 if (sym
->attr
.intrinsic
)
3475 m
= gfc_intrinsic_sub_interface (c
, 1);
3479 gfc_error ("Subroutine %qs at %L is INTRINSIC but is not compatible "
3480 "with an intrinsic", sym
->name
, &c
->loc
);
3488 gfc_procedure_use (sym
, &c
->ext
.actual
, &c
->loc
);
3490 c
->resolved_sym
= sym
;
3491 if (!pure_subroutine (sym
, sym
->name
, &c
->loc
))
3499 resolve_specific_s (gfc_code
*c
)
3504 sym
= c
->symtree
->n
.sym
;
3508 m
= resolve_specific_s0 (c
, sym
);
3511 if (m
== MATCH_ERROR
)
3514 if (sym
->ns
->parent
== NULL
)
3517 gfc_find_symbol (sym
->name
, sym
->ns
->parent
, 1, &sym
);
3523 sym
= c
->symtree
->n
.sym
;
3524 gfc_error ("Unable to resolve the specific subroutine %qs at %L",
3525 sym
->name
, &c
->loc
);
3531 /* Resolve a subroutine call not known to be generic nor specific. */
3534 resolve_unknown_s (gfc_code
*c
)
3538 sym
= c
->symtree
->n
.sym
;
3540 if (sym
->attr
.dummy
)
3542 sym
->attr
.proc
= PROC_DUMMY
;
3546 /* See if we have an intrinsic function reference. */
3548 if (gfc_is_intrinsic (sym
, 1, c
->loc
))
3550 if (gfc_intrinsic_sub_interface (c
, 1) == MATCH_YES
)
3555 /* The reference is to an external name. */
3558 gfc_procedure_use (sym
, &c
->ext
.actual
, &c
->loc
);
3560 c
->resolved_sym
= sym
;
3562 return pure_subroutine (sym
, sym
->name
, &c
->loc
);
3566 /* Resolve a subroutine call. Although it was tempting to use the same code
3567 for functions, subroutines and functions are stored differently and this
3568 makes things awkward. */
3571 resolve_call (gfc_code
*c
)
3574 procedure_type ptype
= PROC_INTRINSIC
;
3575 gfc_symbol
*csym
, *sym
;
3576 bool no_formal_args
;
3578 csym
= c
->symtree
? c
->symtree
->n
.sym
: NULL
;
3580 if (csym
&& csym
->ts
.type
!= BT_UNKNOWN
)
3582 gfc_error ("%qs at %L has a type, which is not consistent with "
3583 "the CALL at %L", csym
->name
, &csym
->declared_at
, &c
->loc
);
3587 if (csym
&& gfc_current_ns
->parent
&& csym
->ns
!= gfc_current_ns
)
3590 gfc_find_sym_tree (c
->symtree
->name
, gfc_current_ns
, 1, &st
);
3591 sym
= st
? st
->n
.sym
: NULL
;
3592 if (sym
&& csym
!= sym
3593 && sym
->ns
== gfc_current_ns
3594 && sym
->attr
.flavor
== FL_PROCEDURE
3595 && sym
->attr
.contained
)
3598 if (csym
->attr
.generic
)
3599 c
->symtree
->n
.sym
= sym
;
3602 csym
= c
->symtree
->n
.sym
;
3606 /* If this ia a deferred TBP, c->expr1 will be set. */
3607 if (!c
->expr1
&& csym
)
3609 if (csym
->attr
.abstract
)
3611 gfc_error ("ABSTRACT INTERFACE %qs must not be referenced at %L",
3612 csym
->name
, &c
->loc
);
3616 /* Subroutines without the RECURSIVE attribution are not allowed to
3618 if (is_illegal_recursion (csym
, gfc_current_ns
))
3620 if (csym
->attr
.entry
&& csym
->ns
->entries
)
3621 gfc_error ("ENTRY %qs at %L cannot be called recursively, "
3622 "as subroutine %qs is not RECURSIVE",
3623 csym
->name
, &c
->loc
, csym
->ns
->entries
->sym
->name
);
3625 gfc_error ("SUBROUTINE %qs at %L cannot be called recursively, "
3626 "as it is not RECURSIVE", csym
->name
, &c
->loc
);
3632 /* Switch off assumed size checking and do this again for certain kinds
3633 of procedure, once the procedure itself is resolved. */
3634 need_full_assumed_size
++;
3637 ptype
= csym
->attr
.proc
;
3639 no_formal_args
= csym
&& is_external_proc (csym
)
3640 && gfc_sym_get_dummy_args (csym
) == NULL
;
3641 if (!resolve_actual_arglist (c
->ext
.actual
, ptype
, no_formal_args
))
3644 /* Resume assumed_size checking. */
3645 need_full_assumed_size
--;
3647 /* If external, check for usage. */
3648 if (csym
&& is_external_proc (csym
))
3649 resolve_global_procedure (csym
, &c
->loc
, &c
->ext
.actual
, 1);
3652 if (c
->resolved_sym
== NULL
)
3654 c
->resolved_isym
= NULL
;
3655 switch (procedure_kind (csym
))
3658 t
= resolve_generic_s (c
);
3661 case PTYPE_SPECIFIC
:
3662 t
= resolve_specific_s (c
);
3666 t
= resolve_unknown_s (c
);
3670 gfc_internal_error ("resolve_subroutine(): bad function type");
3674 /* Some checks of elemental subroutine actual arguments. */
3675 if (!resolve_elemental_actual (NULL
, c
))
3679 update_current_proc_array_outer_dependency (csym
);
3681 /* Typebound procedure: Assume the worst. */
3682 gfc_current_ns
->proc_name
->attr
.array_outer_dependency
= 1;
3688 /* Compare the shapes of two arrays that have non-NULL shapes. If both
3689 op1->shape and op2->shape are non-NULL return true if their shapes
3690 match. If both op1->shape and op2->shape are non-NULL return false
3691 if their shapes do not match. If either op1->shape or op2->shape is
3692 NULL, return true. */
3695 compare_shapes (gfc_expr
*op1
, gfc_expr
*op2
)
3702 if (op1
->shape
!= NULL
&& op2
->shape
!= NULL
)
3704 for (i
= 0; i
< op1
->rank
; i
++)
3706 if (mpz_cmp (op1
->shape
[i
], op2
->shape
[i
]) != 0)
3708 gfc_error ("Shapes for operands at %L and %L are not conformable",
3709 &op1
->where
, &op2
->where
);
3719 /* Convert a logical operator to the corresponding bitwise intrinsic call.
3720 For example A .AND. B becomes IAND(A, B). */
3722 logical_to_bitwise (gfc_expr
*e
)
3724 gfc_expr
*tmp
, *op1
, *op2
;
3726 gfc_actual_arglist
*args
= NULL
;
3728 gcc_assert (e
->expr_type
== EXPR_OP
);
3730 isym
= GFC_ISYM_NONE
;
3731 op1
= e
->value
.op
.op1
;
3732 op2
= e
->value
.op
.op2
;
3734 switch (e
->value
.op
.op
)
3737 isym
= GFC_ISYM_NOT
;
3740 isym
= GFC_ISYM_IAND
;
3743 isym
= GFC_ISYM_IOR
;
3745 case INTRINSIC_NEQV
:
3746 isym
= GFC_ISYM_IEOR
;
3749 /* "Bitwise eqv" is just the complement of NEQV === IEOR.
3750 Change the old expression to NEQV, which will get replaced by IEOR,
3751 and wrap it in NOT. */
3752 tmp
= gfc_copy_expr (e
);
3753 tmp
->value
.op
.op
= INTRINSIC_NEQV
;
3754 tmp
= logical_to_bitwise (tmp
);
3755 isym
= GFC_ISYM_NOT
;
3760 gfc_internal_error ("logical_to_bitwise(): Bad intrinsic");
3763 /* Inherit the original operation's operands as arguments. */
3764 args
= gfc_get_actual_arglist ();
3768 args
->next
= gfc_get_actual_arglist ();
3769 args
->next
->expr
= op2
;
3772 /* Convert the expression to a function call. */
3773 e
->expr_type
= EXPR_FUNCTION
;
3774 e
->value
.function
.actual
= args
;
3775 e
->value
.function
.isym
= gfc_intrinsic_function_by_id (isym
);
3776 e
->value
.function
.name
= e
->value
.function
.isym
->name
;
3777 e
->value
.function
.esym
= NULL
;
3779 /* Make up a pre-resolved function call symtree if we need to. */
3780 if (!e
->symtree
|| !e
->symtree
->n
.sym
)
3783 gfc_get_ha_sym_tree (e
->value
.function
.isym
->name
, &e
->symtree
);
3784 sym
= e
->symtree
->n
.sym
;
3786 sym
->attr
.flavor
= FL_PROCEDURE
;
3787 sym
->attr
.function
= 1;
3788 sym
->attr
.elemental
= 1;
3790 sym
->attr
.referenced
= 1;
3791 gfc_intrinsic_symbol (sym
);
3792 gfc_commit_symbol (sym
);
3795 args
->name
= e
->value
.function
.isym
->formal
->name
;
3796 if (e
->value
.function
.isym
->formal
->next
)
3797 args
->next
->name
= e
->value
.function
.isym
->formal
->next
->name
;
3802 /* Recursively append candidate UOP to CANDIDATES. Store the number of
3803 candidates in CANDIDATES_LEN. */
3805 lookup_uop_fuzzy_find_candidates (gfc_symtree
*uop
,
3807 size_t &candidates_len
)
3814 /* Not sure how to properly filter here. Use all for a start.
3815 n.uop.op is NULL for empty interface operators (is that legal?) disregard
3816 these as i suppose they don't make terribly sense. */
3818 if (uop
->n
.uop
->op
!= NULL
)
3819 vec_push (candidates
, candidates_len
, uop
->name
);
3823 lookup_uop_fuzzy_find_candidates (p
, candidates
, candidates_len
);
3827 lookup_uop_fuzzy_find_candidates (p
, candidates
, candidates_len
);
3830 /* Lookup user-operator OP fuzzily, taking names in UOP into account. */
3833 lookup_uop_fuzzy (const char *op
, gfc_symtree
*uop
)
3835 char **candidates
= NULL
;
3836 size_t candidates_len
= 0;
3837 lookup_uop_fuzzy_find_candidates (uop
, candidates
, candidates_len
);
3838 return gfc_closest_fuzzy_match (op
, candidates
);
3842 /* Callback finding an impure function as an operand to an .and. or
3843 .or. expression. Remember the last function warned about to
3844 avoid double warnings when recursing. */
3847 impure_function_callback (gfc_expr
**e
, int *walk_subtrees ATTRIBUTE_UNUSED
,
3852 static gfc_expr
*last
= NULL
;
3853 bool *found
= (bool *) data
;
3855 if (f
->expr_type
== EXPR_FUNCTION
)
3858 if (f
!= last
&& !gfc_pure_function (f
, &name
)
3859 && !gfc_implicit_pure_function (f
))
3862 gfc_warning (OPT_Wfunction_elimination
,
3863 "Impure function %qs at %L might not be evaluated",
3866 gfc_warning (OPT_Wfunction_elimination
,
3867 "Impure function at %L might not be evaluated",
3877 /* Resolve an operator expression node. This can involve replacing the
3878 operation with a user defined function call. */
3881 resolve_operator (gfc_expr
*e
)
3883 gfc_expr
*op1
, *op2
;
3885 bool dual_locus_error
;
3888 /* Resolve all subnodes-- give them types. */
3890 switch (e
->value
.op
.op
)
3893 if (!gfc_resolve_expr (e
->value
.op
.op2
))
3899 case INTRINSIC_UPLUS
:
3900 case INTRINSIC_UMINUS
:
3901 case INTRINSIC_PARENTHESES
:
3902 if (!gfc_resolve_expr (e
->value
.op
.op1
))
3907 /* Typecheck the new node. */
3909 op1
= e
->value
.op
.op1
;
3910 op2
= e
->value
.op
.op2
;
3911 dual_locus_error
= false;
3913 if ((op1
&& op1
->expr_type
== EXPR_NULL
)
3914 || (op2
&& op2
->expr_type
== EXPR_NULL
))
3916 sprintf (msg
, _("Invalid context for NULL() pointer at %%L"));
3920 switch (e
->value
.op
.op
)
3922 case INTRINSIC_UPLUS
:
3923 case INTRINSIC_UMINUS
:
3924 if (op1
->ts
.type
== BT_INTEGER
3925 || op1
->ts
.type
== BT_REAL
3926 || op1
->ts
.type
== BT_COMPLEX
)
3932 sprintf (msg
, _("Operand of unary numeric operator %%<%s%%> at %%L is %s"),
3933 gfc_op2string (e
->value
.op
.op
), gfc_typename (&e
->ts
));
3936 case INTRINSIC_PLUS
:
3937 case INTRINSIC_MINUS
:
3938 case INTRINSIC_TIMES
:
3939 case INTRINSIC_DIVIDE
:
3940 case INTRINSIC_POWER
:
3941 if (gfc_numeric_ts (&op1
->ts
) && gfc_numeric_ts (&op2
->ts
))
3943 gfc_type_convert_binary (e
, 1);
3947 if (op1
->ts
.type
== BT_DERIVED
|| op2
->ts
.type
== BT_DERIVED
)
3949 _("Unexpected derived-type entities in binary intrinsic "
3950 "numeric operator %%<%s%%> at %%L"),
3951 gfc_op2string (e
->value
.op
.op
));
3954 _("Operands of binary numeric operator %%<%s%%> at %%L are %s/%s"),
3955 gfc_op2string (e
->value
.op
.op
), gfc_typename (&op1
->ts
),
3956 gfc_typename (&op2
->ts
));
3959 case INTRINSIC_CONCAT
:
3960 if (op1
->ts
.type
== BT_CHARACTER
&& op2
->ts
.type
== BT_CHARACTER
3961 && op1
->ts
.kind
== op2
->ts
.kind
)
3963 e
->ts
.type
= BT_CHARACTER
;
3964 e
->ts
.kind
= op1
->ts
.kind
;
3969 _("Operands of string concatenation operator at %%L are %s/%s"),
3970 gfc_typename (&op1
->ts
), gfc_typename (&op2
->ts
));
3976 case INTRINSIC_NEQV
:
3977 if (op1
->ts
.type
== BT_LOGICAL
&& op2
->ts
.type
== BT_LOGICAL
)
3979 e
->ts
.type
= BT_LOGICAL
;
3980 e
->ts
.kind
= gfc_kind_max (op1
, op2
);
3981 if (op1
->ts
.kind
< e
->ts
.kind
)
3982 gfc_convert_type (op1
, &e
->ts
, 2);
3983 else if (op2
->ts
.kind
< e
->ts
.kind
)
3984 gfc_convert_type (op2
, &e
->ts
, 2);
3986 if (flag_frontend_optimize
&&
3987 (e
->value
.op
.op
== INTRINSIC_AND
|| e
->value
.op
.op
== INTRINSIC_OR
))
3989 /* Warn about short-circuiting
3990 with impure function as second operand. */
3992 gfc_expr_walker (&op2
, impure_function_callback
, &op2_f
);
3997 /* Logical ops on integers become bitwise ops with -fdec. */
3999 && (op1
->ts
.type
== BT_INTEGER
|| op2
->ts
.type
== BT_INTEGER
))
4001 e
->ts
.type
= BT_INTEGER
;
4002 e
->ts
.kind
= gfc_kind_max (op1
, op2
);
4003 if (op1
->ts
.type
!= e
->ts
.type
|| op1
->ts
.kind
!= e
->ts
.kind
)
4004 gfc_convert_type (op1
, &e
->ts
, 1);
4005 if (op2
->ts
.type
!= e
->ts
.type
|| op2
->ts
.kind
!= e
->ts
.kind
)
4006 gfc_convert_type (op2
, &e
->ts
, 1);
4007 e
= logical_to_bitwise (e
);
4011 sprintf (msg
, _("Operands of logical operator %%<%s%%> at %%L are %s/%s"),
4012 gfc_op2string (e
->value
.op
.op
), gfc_typename (&op1
->ts
),
4013 gfc_typename (&op2
->ts
));
4018 /* Logical ops on integers become bitwise ops with -fdec. */
4019 if (flag_dec
&& op1
->ts
.type
== BT_INTEGER
)
4021 e
->ts
.type
= BT_INTEGER
;
4022 e
->ts
.kind
= op1
->ts
.kind
;
4023 e
= logical_to_bitwise (e
);
4027 if (op1
->ts
.type
== BT_LOGICAL
)
4029 e
->ts
.type
= BT_LOGICAL
;
4030 e
->ts
.kind
= op1
->ts
.kind
;
4034 sprintf (msg
, _("Operand of .not. operator at %%L is %s"),
4035 gfc_typename (&op1
->ts
));
4039 case INTRINSIC_GT_OS
:
4041 case INTRINSIC_GE_OS
:
4043 case INTRINSIC_LT_OS
:
4045 case INTRINSIC_LE_OS
:
4046 if (op1
->ts
.type
== BT_COMPLEX
|| op2
->ts
.type
== BT_COMPLEX
)
4048 strcpy (msg
, _("COMPLEX quantities cannot be compared at %L"));
4055 case INTRINSIC_EQ_OS
:
4057 case INTRINSIC_NE_OS
:
4058 if (op1
->ts
.type
== BT_CHARACTER
&& op2
->ts
.type
== BT_CHARACTER
4059 && op1
->ts
.kind
== op2
->ts
.kind
)
4061 e
->ts
.type
= BT_LOGICAL
;
4062 e
->ts
.kind
= gfc_default_logical_kind
;
4066 if (gfc_numeric_ts (&op1
->ts
) && gfc_numeric_ts (&op2
->ts
))
4068 gfc_type_convert_binary (e
, 1);
4070 e
->ts
.type
= BT_LOGICAL
;
4071 e
->ts
.kind
= gfc_default_logical_kind
;
4073 if (warn_compare_reals
)
4075 gfc_intrinsic_op op
= e
->value
.op
.op
;
4077 /* Type conversion has made sure that the types of op1 and op2
4078 agree, so it is only necessary to check the first one. */
4079 if ((op1
->ts
.type
== BT_REAL
|| op1
->ts
.type
== BT_COMPLEX
)
4080 && (op
== INTRINSIC_EQ
|| op
== INTRINSIC_EQ_OS
4081 || op
== INTRINSIC_NE
|| op
== INTRINSIC_NE_OS
))
4085 if (op
== INTRINSIC_EQ
|| op
== INTRINSIC_EQ_OS
)
4086 msg
= "Equality comparison for %s at %L";
4088 msg
= "Inequality comparison for %s at %L";
4090 gfc_warning (OPT_Wcompare_reals
, msg
,
4091 gfc_typename (&op1
->ts
), &op1
->where
);
4098 if (op1
->ts
.type
== BT_LOGICAL
&& op2
->ts
.type
== BT_LOGICAL
)
4100 _("Logicals at %%L must be compared with %s instead of %s"),
4101 (e
->value
.op
.op
== INTRINSIC_EQ
4102 || e
->value
.op
.op
== INTRINSIC_EQ_OS
)
4103 ? ".eqv." : ".neqv.", gfc_op2string (e
->value
.op
.op
));
4106 _("Operands of comparison operator %%<%s%%> at %%L are %s/%s"),
4107 gfc_op2string (e
->value
.op
.op
), gfc_typename (&op1
->ts
),
4108 gfc_typename (&op2
->ts
));
4112 case INTRINSIC_USER
:
4113 if (e
->value
.op
.uop
->op
== NULL
)
4115 const char *name
= e
->value
.op
.uop
->name
;
4116 const char *guessed
;
4117 guessed
= lookup_uop_fuzzy (name
, e
->value
.op
.uop
->ns
->uop_root
);
4119 sprintf (msg
, _("Unknown operator %%<%s%%> at %%L; did you mean '%s'?"),
4122 sprintf (msg
, _("Unknown operator %%<%s%%> at %%L"), name
);
4124 else if (op2
== NULL
)
4125 sprintf (msg
, _("Operand of user operator %%<%s%%> at %%L is %s"),
4126 e
->value
.op
.uop
->name
, gfc_typename (&op1
->ts
));
4129 sprintf (msg
, _("Operands of user operator %%<%s%%> at %%L are %s/%s"),
4130 e
->value
.op
.uop
->name
, gfc_typename (&op1
->ts
),
4131 gfc_typename (&op2
->ts
));
4132 e
->value
.op
.uop
->op
->sym
->attr
.referenced
= 1;
4137 case INTRINSIC_PARENTHESES
:
4139 if (e
->ts
.type
== BT_CHARACTER
)
4140 e
->ts
.u
.cl
= op1
->ts
.u
.cl
;
4144 gfc_internal_error ("resolve_operator(): Bad intrinsic");
4147 /* Deal with arrayness of an operand through an operator. */
4149 switch (e
->value
.op
.op
)
4151 case INTRINSIC_PLUS
:
4152 case INTRINSIC_MINUS
:
4153 case INTRINSIC_TIMES
:
4154 case INTRINSIC_DIVIDE
:
4155 case INTRINSIC_POWER
:
4156 case INTRINSIC_CONCAT
:
4160 case INTRINSIC_NEQV
:
4162 case INTRINSIC_EQ_OS
:
4164 case INTRINSIC_NE_OS
:
4166 case INTRINSIC_GT_OS
:
4168 case INTRINSIC_GE_OS
:
4170 case INTRINSIC_LT_OS
:
4172 case INTRINSIC_LE_OS
:
4174 if (op1
->rank
== 0 && op2
->rank
== 0)
4177 if (op1
->rank
== 0 && op2
->rank
!= 0)
4179 e
->rank
= op2
->rank
;
4181 if (e
->shape
== NULL
)
4182 e
->shape
= gfc_copy_shape (op2
->shape
, op2
->rank
);
4185 if (op1
->rank
!= 0 && op2
->rank
== 0)
4187 e
->rank
= op1
->rank
;
4189 if (e
->shape
== NULL
)
4190 e
->shape
= gfc_copy_shape (op1
->shape
, op1
->rank
);
4193 if (op1
->rank
!= 0 && op2
->rank
!= 0)
4195 if (op1
->rank
== op2
->rank
)
4197 e
->rank
= op1
->rank
;
4198 if (e
->shape
== NULL
)
4200 t
= compare_shapes (op1
, op2
);
4204 e
->shape
= gfc_copy_shape (op1
->shape
, op1
->rank
);
4209 /* Allow higher level expressions to work. */
4212 /* Try user-defined operators, and otherwise throw an error. */
4213 dual_locus_error
= true;
4215 _("Inconsistent ranks for operator at %%L and %%L"));
4222 case INTRINSIC_PARENTHESES
:
4224 case INTRINSIC_UPLUS
:
4225 case INTRINSIC_UMINUS
:
4226 /* Simply copy arrayness attribute */
4227 e
->rank
= op1
->rank
;
4229 if (e
->shape
== NULL
)
4230 e
->shape
= gfc_copy_shape (op1
->shape
, op1
->rank
);
4240 /* Attempt to simplify the expression. */
4243 t
= gfc_simplify_expr (e
, 0);
4244 /* Some calls do not succeed in simplification and return false
4245 even though there is no error; e.g. variable references to
4246 PARAMETER arrays. */
4247 if (!gfc_is_constant_expr (e
))
4255 match m
= gfc_extend_expr (e
);
4258 if (m
== MATCH_ERROR
)
4262 if (dual_locus_error
)
4263 gfc_error (msg
, &op1
->where
, &op2
->where
);
4265 gfc_error (msg
, &e
->where
);
4271 /************** Array resolution subroutines **************/
4274 { CMP_LT
, CMP_EQ
, CMP_GT
, CMP_UNKNOWN
};
4276 /* Compare two integer expressions. */
4278 static compare_result
4279 compare_bound (gfc_expr
*a
, gfc_expr
*b
)
4283 if (a
== NULL
|| a
->expr_type
!= EXPR_CONSTANT
4284 || b
== NULL
|| b
->expr_type
!= EXPR_CONSTANT
)
4287 /* If either of the types isn't INTEGER, we must have
4288 raised an error earlier. */
4290 if (a
->ts
.type
!= BT_INTEGER
|| b
->ts
.type
!= BT_INTEGER
)
4293 i
= mpz_cmp (a
->value
.integer
, b
->value
.integer
);
4303 /* Compare an integer expression with an integer. */
4305 static compare_result
4306 compare_bound_int (gfc_expr
*a
, int b
)
4310 if (a
== NULL
|| a
->expr_type
!= EXPR_CONSTANT
)
4313 if (a
->ts
.type
!= BT_INTEGER
)
4314 gfc_internal_error ("compare_bound_int(): Bad expression");
4316 i
= mpz_cmp_si (a
->value
.integer
, b
);
4326 /* Compare an integer expression with a mpz_t. */
4328 static compare_result
4329 compare_bound_mpz_t (gfc_expr
*a
, mpz_t b
)
4333 if (a
== NULL
|| a
->expr_type
!= EXPR_CONSTANT
)
4336 if (a
->ts
.type
!= BT_INTEGER
)
4337 gfc_internal_error ("compare_bound_int(): Bad expression");
4339 i
= mpz_cmp (a
->value
.integer
, b
);
4349 /* Compute the last value of a sequence given by a triplet.
4350 Return 0 if it wasn't able to compute the last value, or if the
4351 sequence if empty, and 1 otherwise. */
4354 compute_last_value_for_triplet (gfc_expr
*start
, gfc_expr
*end
,
4355 gfc_expr
*stride
, mpz_t last
)
4359 if (start
== NULL
|| start
->expr_type
!= EXPR_CONSTANT
4360 || end
== NULL
|| end
->expr_type
!= EXPR_CONSTANT
4361 || (stride
!= NULL
&& stride
->expr_type
!= EXPR_CONSTANT
))
4364 if (start
->ts
.type
!= BT_INTEGER
|| end
->ts
.type
!= BT_INTEGER
4365 || (stride
!= NULL
&& stride
->ts
.type
!= BT_INTEGER
))
4368 if (stride
== NULL
|| compare_bound_int (stride
, 1) == CMP_EQ
)
4370 if (compare_bound (start
, end
) == CMP_GT
)
4372 mpz_set (last
, end
->value
.integer
);
4376 if (compare_bound_int (stride
, 0) == CMP_GT
)
4378 /* Stride is positive */
4379 if (mpz_cmp (start
->value
.integer
, end
->value
.integer
) > 0)
4384 /* Stride is negative */
4385 if (mpz_cmp (start
->value
.integer
, end
->value
.integer
) < 0)
4390 mpz_sub (rem
, end
->value
.integer
, start
->value
.integer
);
4391 mpz_tdiv_r (rem
, rem
, stride
->value
.integer
);
4392 mpz_sub (last
, end
->value
.integer
, rem
);
4399 /* Compare a single dimension of an array reference to the array
4403 check_dimension (int i
, gfc_array_ref
*ar
, gfc_array_spec
*as
)
4407 if (ar
->dimen_type
[i
] == DIMEN_STAR
)
4409 gcc_assert (ar
->stride
[i
] == NULL
);
4410 /* This implies [*] as [*:] and [*:3] are not possible. */
4411 if (ar
->start
[i
] == NULL
)
4413 gcc_assert (ar
->end
[i
] == NULL
);
4418 /* Given start, end and stride values, calculate the minimum and
4419 maximum referenced indexes. */
4421 switch (ar
->dimen_type
[i
])
4424 case DIMEN_THIS_IMAGE
:
4429 if (compare_bound (ar
->start
[i
], as
->lower
[i
]) == CMP_LT
)
4432 gfc_warning (0, "Array reference at %L is out of bounds "
4433 "(%ld < %ld) in dimension %d", &ar
->c_where
[i
],
4434 mpz_get_si (ar
->start
[i
]->value
.integer
),
4435 mpz_get_si (as
->lower
[i
]->value
.integer
), i
+1);
4437 gfc_warning (0, "Array reference at %L is out of bounds "
4438 "(%ld < %ld) in codimension %d", &ar
->c_where
[i
],
4439 mpz_get_si (ar
->start
[i
]->value
.integer
),
4440 mpz_get_si (as
->lower
[i
]->value
.integer
),
4444 if (compare_bound (ar
->start
[i
], as
->upper
[i
]) == CMP_GT
)
4447 gfc_warning (0, "Array reference at %L is out of bounds "
4448 "(%ld > %ld) in dimension %d", &ar
->c_where
[i
],
4449 mpz_get_si (ar
->start
[i
]->value
.integer
),
4450 mpz_get_si (as
->upper
[i
]->value
.integer
), i
+1);
4452 gfc_warning (0, "Array reference at %L is out of bounds "
4453 "(%ld > %ld) in codimension %d", &ar
->c_where
[i
],
4454 mpz_get_si (ar
->start
[i
]->value
.integer
),
4455 mpz_get_si (as
->upper
[i
]->value
.integer
),
4464 #define AR_START (ar->start[i] ? ar->start[i] : as->lower[i])
4465 #define AR_END (ar->end[i] ? ar->end[i] : as->upper[i])
4467 compare_result comp_start_end
= compare_bound (AR_START
, AR_END
);
4469 /* Check for zero stride, which is not allowed. */
4470 if (compare_bound_int (ar
->stride
[i
], 0) == CMP_EQ
)
4472 gfc_error ("Illegal stride of zero at %L", &ar
->c_where
[i
]);
4476 /* if start == len || (stride > 0 && start < len)
4477 || (stride < 0 && start > len),
4478 then the array section contains at least one element. In this
4479 case, there is an out-of-bounds access if
4480 (start < lower || start > upper). */
4481 if (compare_bound (AR_START
, AR_END
) == CMP_EQ
4482 || ((compare_bound_int (ar
->stride
[i
], 0) == CMP_GT
4483 || ar
->stride
[i
] == NULL
) && comp_start_end
== CMP_LT
)
4484 || (compare_bound_int (ar
->stride
[i
], 0) == CMP_LT
4485 && comp_start_end
== CMP_GT
))
4487 if (compare_bound (AR_START
, as
->lower
[i
]) == CMP_LT
)
4489 gfc_warning (0, "Lower array reference at %L is out of bounds "
4490 "(%ld < %ld) in dimension %d", &ar
->c_where
[i
],
4491 mpz_get_si (AR_START
->value
.integer
),
4492 mpz_get_si (as
->lower
[i
]->value
.integer
), i
+1);
4495 if (compare_bound (AR_START
, as
->upper
[i
]) == CMP_GT
)
4497 gfc_warning (0, "Lower array reference at %L is out of bounds "
4498 "(%ld > %ld) in dimension %d", &ar
->c_where
[i
],
4499 mpz_get_si (AR_START
->value
.integer
),
4500 mpz_get_si (as
->upper
[i
]->value
.integer
), i
+1);
4505 /* If we can compute the highest index of the array section,
4506 then it also has to be between lower and upper. */
4507 mpz_init (last_value
);
4508 if (compute_last_value_for_triplet (AR_START
, AR_END
, ar
->stride
[i
],
4511 if (compare_bound_mpz_t (as
->lower
[i
], last_value
) == CMP_GT
)
4513 gfc_warning (0, "Upper array reference at %L is out of bounds "
4514 "(%ld < %ld) in dimension %d", &ar
->c_where
[i
],
4515 mpz_get_si (last_value
),
4516 mpz_get_si (as
->lower
[i
]->value
.integer
), i
+1);
4517 mpz_clear (last_value
);
4520 if (compare_bound_mpz_t (as
->upper
[i
], last_value
) == CMP_LT
)
4522 gfc_warning (0, "Upper array reference at %L is out of bounds "
4523 "(%ld > %ld) in dimension %d", &ar
->c_where
[i
],
4524 mpz_get_si (last_value
),
4525 mpz_get_si (as
->upper
[i
]->value
.integer
), i
+1);
4526 mpz_clear (last_value
);
4530 mpz_clear (last_value
);
4538 gfc_internal_error ("check_dimension(): Bad array reference");
4545 /* Compare an array reference with an array specification. */
4548 compare_spec_to_ref (gfc_array_ref
*ar
)
4555 /* TODO: Full array sections are only allowed as actual parameters. */
4556 if (as
->type
== AS_ASSUMED_SIZE
4557 && (/*ar->type == AR_FULL
4558 ||*/ (ar
->type
== AR_SECTION
4559 && ar
->dimen_type
[i
] == DIMEN_RANGE
&& ar
->end
[i
] == NULL
)))
4561 gfc_error ("Rightmost upper bound of assumed size array section "
4562 "not specified at %L", &ar
->where
);
4566 if (ar
->type
== AR_FULL
)
4569 if (as
->rank
!= ar
->dimen
)
4571 gfc_error ("Rank mismatch in array reference at %L (%d/%d)",
4572 &ar
->where
, ar
->dimen
, as
->rank
);
4576 /* ar->codimen == 0 is a local array. */
4577 if (as
->corank
!= ar
->codimen
&& ar
->codimen
!= 0)
4579 gfc_error ("Coindex rank mismatch in array reference at %L (%d/%d)",
4580 &ar
->where
, ar
->codimen
, as
->corank
);
4584 for (i
= 0; i
< as
->rank
; i
++)
4585 if (!check_dimension (i
, ar
, as
))
4588 /* Local access has no coarray spec. */
4589 if (ar
->codimen
!= 0)
4590 for (i
= as
->rank
; i
< as
->rank
+ as
->corank
; i
++)
4592 if (ar
->dimen_type
[i
] != DIMEN_ELEMENT
&& !ar
->in_allocate
4593 && ar
->dimen_type
[i
] != DIMEN_THIS_IMAGE
)
4595 gfc_error ("Coindex of codimension %d must be a scalar at %L",
4596 i
+ 1 - as
->rank
, &ar
->where
);
4599 if (!check_dimension (i
, ar
, as
))
4607 /* Resolve one part of an array index. */
4610 gfc_resolve_index_1 (gfc_expr
*index
, int check_scalar
,
4611 int force_index_integer_kind
)
4618 if (!gfc_resolve_expr (index
))
4621 if (check_scalar
&& index
->rank
!= 0)
4623 gfc_error ("Array index at %L must be scalar", &index
->where
);
4627 if (index
->ts
.type
!= BT_INTEGER
&& index
->ts
.type
!= BT_REAL
)
4629 gfc_error ("Array index at %L must be of INTEGER type, found %s",
4630 &index
->where
, gfc_basic_typename (index
->ts
.type
));
4634 if (index
->ts
.type
== BT_REAL
)
4635 if (!gfc_notify_std (GFC_STD_LEGACY
, "REAL array index at %L",
4639 if ((index
->ts
.kind
!= gfc_index_integer_kind
4640 && force_index_integer_kind
)
4641 || index
->ts
.type
!= BT_INTEGER
)
4644 ts
.type
= BT_INTEGER
;
4645 ts
.kind
= gfc_index_integer_kind
;
4647 gfc_convert_type_warn (index
, &ts
, 2, 0);
4653 /* Resolve one part of an array index. */
4656 gfc_resolve_index (gfc_expr
*index
, int check_scalar
)
4658 return gfc_resolve_index_1 (index
, check_scalar
, 1);
4661 /* Resolve a dim argument to an intrinsic function. */
4664 gfc_resolve_dim_arg (gfc_expr
*dim
)
4669 if (!gfc_resolve_expr (dim
))
4674 gfc_error ("Argument dim at %L must be scalar", &dim
->where
);
4679 if (dim
->ts
.type
!= BT_INTEGER
)
4681 gfc_error ("Argument dim at %L must be of INTEGER type", &dim
->where
);
4685 if (dim
->ts
.kind
!= gfc_index_integer_kind
)
4690 ts
.type
= BT_INTEGER
;
4691 ts
.kind
= gfc_index_integer_kind
;
4693 gfc_convert_type_warn (dim
, &ts
, 2, 0);
4699 /* Given an expression that contains array references, update those array
4700 references to point to the right array specifications. While this is
4701 filled in during matching, this information is difficult to save and load
4702 in a module, so we take care of it here.
4704 The idea here is that the original array reference comes from the
4705 base symbol. We traverse the list of reference structures, setting
4706 the stored reference to references. Component references can
4707 provide an additional array specification. */
4710 find_array_spec (gfc_expr
*e
)
4716 if (e
->symtree
->n
.sym
->ts
.type
== BT_CLASS
)
4717 as
= CLASS_DATA (e
->symtree
->n
.sym
)->as
;
4719 as
= e
->symtree
->n
.sym
->as
;
4721 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
4726 gfc_internal_error ("find_array_spec(): Missing spec");
4733 c
= ref
->u
.c
.component
;
4734 if (c
->attr
.dimension
)
4737 gfc_internal_error ("find_array_spec(): unused as(1)");
4749 gfc_internal_error ("find_array_spec(): unused as(2)");
4753 /* Resolve an array reference. */
4756 resolve_array_ref (gfc_array_ref
*ar
)
4758 int i
, check_scalar
;
4761 for (i
= 0; i
< ar
->dimen
+ ar
->codimen
; i
++)
4763 check_scalar
= ar
->dimen_type
[i
] == DIMEN_RANGE
;
4765 /* Do not force gfc_index_integer_kind for the start. We can
4766 do fine with any integer kind. This avoids temporary arrays
4767 created for indexing with a vector. */
4768 if (!gfc_resolve_index_1 (ar
->start
[i
], check_scalar
, 0))
4770 if (!gfc_resolve_index (ar
->end
[i
], check_scalar
))
4772 if (!gfc_resolve_index (ar
->stride
[i
], check_scalar
))
4777 if (ar
->dimen_type
[i
] == DIMEN_UNKNOWN
)
4781 ar
->dimen_type
[i
] = DIMEN_ELEMENT
;
4785 ar
->dimen_type
[i
] = DIMEN_VECTOR
;
4786 if (e
->expr_type
== EXPR_VARIABLE
4787 && e
->symtree
->n
.sym
->ts
.type
== BT_DERIVED
)
4788 ar
->start
[i
] = gfc_get_parentheses (e
);
4792 gfc_error ("Array index at %L is an array of rank %d",
4793 &ar
->c_where
[i
], e
->rank
);
4797 /* Fill in the upper bound, which may be lower than the
4798 specified one for something like a(2:10:5), which is
4799 identical to a(2:7:5). Only relevant for strides not equal
4800 to one. Don't try a division by zero. */
4801 if (ar
->dimen_type
[i
] == DIMEN_RANGE
4802 && ar
->stride
[i
] != NULL
&& ar
->stride
[i
]->expr_type
== EXPR_CONSTANT
4803 && mpz_cmp_si (ar
->stride
[i
]->value
.integer
, 1L) != 0
4804 && mpz_cmp_si (ar
->stride
[i
]->value
.integer
, 0L) != 0)
4808 if (gfc_ref_dimen_size (ar
, i
, &size
, &end
))
4810 if (ar
->end
[i
] == NULL
)
4813 gfc_get_constant_expr (BT_INTEGER
, gfc_index_integer_kind
,
4815 mpz_set (ar
->end
[i
]->value
.integer
, end
);
4817 else if (ar
->end
[i
]->ts
.type
== BT_INTEGER
4818 && ar
->end
[i
]->expr_type
== EXPR_CONSTANT
)
4820 mpz_set (ar
->end
[i
]->value
.integer
, end
);
4831 if (ar
->type
== AR_FULL
)
4833 if (ar
->as
->rank
== 0)
4834 ar
->type
= AR_ELEMENT
;
4836 /* Make sure array is the same as array(:,:), this way
4837 we don't need to special case all the time. */
4838 ar
->dimen
= ar
->as
->rank
;
4839 for (i
= 0; i
< ar
->dimen
; i
++)
4841 ar
->dimen_type
[i
] = DIMEN_RANGE
;
4843 gcc_assert (ar
->start
[i
] == NULL
);
4844 gcc_assert (ar
->end
[i
] == NULL
);
4845 gcc_assert (ar
->stride
[i
] == NULL
);
4849 /* If the reference type is unknown, figure out what kind it is. */
4851 if (ar
->type
== AR_UNKNOWN
)
4853 ar
->type
= AR_ELEMENT
;
4854 for (i
= 0; i
< ar
->dimen
; i
++)
4855 if (ar
->dimen_type
[i
] == DIMEN_RANGE
4856 || ar
->dimen_type
[i
] == DIMEN_VECTOR
)
4858 ar
->type
= AR_SECTION
;
4863 if (!ar
->as
->cray_pointee
&& !compare_spec_to_ref (ar
))
4866 if (ar
->as
->corank
&& ar
->codimen
== 0)
4869 ar
->codimen
= ar
->as
->corank
;
4870 for (n
= ar
->dimen
; n
< ar
->dimen
+ ar
->codimen
; n
++)
4871 ar
->dimen_type
[n
] = DIMEN_THIS_IMAGE
;
4879 resolve_substring (gfc_ref
*ref
, bool *equal_length
)
4881 int k
= gfc_validate_kind (BT_INTEGER
, gfc_charlen_int_kind
, false);
4883 if (ref
->u
.ss
.start
!= NULL
)
4885 if (!gfc_resolve_expr (ref
->u
.ss
.start
))
4888 if (ref
->u
.ss
.start
->ts
.type
!= BT_INTEGER
)
4890 gfc_error ("Substring start index at %L must be of type INTEGER",
4891 &ref
->u
.ss
.start
->where
);
4895 if (ref
->u
.ss
.start
->rank
!= 0)
4897 gfc_error ("Substring start index at %L must be scalar",
4898 &ref
->u
.ss
.start
->where
);
4902 if (compare_bound_int (ref
->u
.ss
.start
, 1) == CMP_LT
4903 && (compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_EQ
4904 || compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_GT
))
4906 gfc_error ("Substring start index at %L is less than one",
4907 &ref
->u
.ss
.start
->where
);
4912 if (ref
->u
.ss
.end
!= NULL
)
4914 if (!gfc_resolve_expr (ref
->u
.ss
.end
))
4917 if (ref
->u
.ss
.end
->ts
.type
!= BT_INTEGER
)
4919 gfc_error ("Substring end index at %L must be of type INTEGER",
4920 &ref
->u
.ss
.end
->where
);
4924 if (ref
->u
.ss
.end
->rank
!= 0)
4926 gfc_error ("Substring end index at %L must be scalar",
4927 &ref
->u
.ss
.end
->where
);
4931 if (ref
->u
.ss
.length
!= NULL
4932 && compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.length
->length
) == CMP_GT
4933 && (compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_EQ
4934 || compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_GT
))
4936 gfc_error ("Substring end index at %L exceeds the string length",
4937 &ref
->u
.ss
.start
->where
);
4941 if (compare_bound_mpz_t (ref
->u
.ss
.end
,
4942 gfc_integer_kinds
[k
].huge
) == CMP_GT
4943 && (compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_EQ
4944 || compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_GT
))
4946 gfc_error ("Substring end index at %L is too large",
4947 &ref
->u
.ss
.end
->where
);
4950 /* If the substring has the same length as the original
4951 variable, the reference itself can be deleted. */
4953 if (ref
->u
.ss
.length
!= NULL
4954 && compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.length
->length
) == CMP_EQ
4955 && compare_bound_int (ref
->u
.ss
.start
, 1) == CMP_EQ
)
4956 *equal_length
= true;
4963 /* This function supplies missing substring charlens. */
4966 gfc_resolve_substring_charlen (gfc_expr
*e
)
4969 gfc_expr
*start
, *end
;
4970 gfc_typespec
*ts
= NULL
;
4973 for (char_ref
= e
->ref
; char_ref
; char_ref
= char_ref
->next
)
4975 if (char_ref
->type
== REF_SUBSTRING
|| char_ref
->type
== REF_INQUIRY
)
4977 if (char_ref
->type
== REF_COMPONENT
)
4978 ts
= &char_ref
->u
.c
.component
->ts
;
4981 if (!char_ref
|| char_ref
->type
== REF_INQUIRY
)
4984 gcc_assert (char_ref
->next
== NULL
);
4988 if (e
->ts
.u
.cl
->length
)
4989 gfc_free_expr (e
->ts
.u
.cl
->length
);
4990 else if (e
->expr_type
== EXPR_VARIABLE
&& e
->symtree
->n
.sym
->attr
.dummy
)
4994 e
->ts
.type
= BT_CHARACTER
;
4995 e
->ts
.kind
= gfc_default_character_kind
;
4998 e
->ts
.u
.cl
= gfc_new_charlen (gfc_current_ns
, NULL
);
5000 if (char_ref
->u
.ss
.start
)
5001 start
= gfc_copy_expr (char_ref
->u
.ss
.start
);
5003 start
= gfc_get_int_expr (gfc_charlen_int_kind
, NULL
, 1);
5005 if (char_ref
->u
.ss
.end
)
5006 end
= gfc_copy_expr (char_ref
->u
.ss
.end
);
5007 else if (e
->expr_type
== EXPR_VARIABLE
)
5010 ts
= &e
->symtree
->n
.sym
->ts
;
5011 end
= gfc_copy_expr (ts
->u
.cl
->length
);
5018 gfc_free_expr (start
);
5019 gfc_free_expr (end
);
5023 /* Length = (end - start + 1).
5024 Check first whether it has a constant length. */
5025 if (gfc_dep_difference (end
, start
, &diff
))
5027 gfc_expr
*len
= gfc_get_constant_expr (BT_INTEGER
, gfc_charlen_int_kind
,
5030 mpz_add_ui (len
->value
.integer
, diff
, 1);
5032 e
->ts
.u
.cl
->length
= len
;
5033 /* The check for length < 0 is handled below */
5037 e
->ts
.u
.cl
->length
= gfc_subtract (end
, start
);
5038 e
->ts
.u
.cl
->length
= gfc_add (e
->ts
.u
.cl
->length
,
5039 gfc_get_int_expr (gfc_charlen_int_kind
,
5043 /* F2008, 6.4.1: Both the starting point and the ending point shall
5044 be within the range 1, 2, ..., n unless the starting point exceeds
5045 the ending point, in which case the substring has length zero. */
5047 if (mpz_cmp_si (e
->ts
.u
.cl
->length
->value
.integer
, 0) < 0)
5048 mpz_set_si (e
->ts
.u
.cl
->length
->value
.integer
, 0);
5050 e
->ts
.u
.cl
->length
->ts
.type
= BT_INTEGER
;
5051 e
->ts
.u
.cl
->length
->ts
.kind
= gfc_charlen_int_kind
;
5053 /* Make sure that the length is simplified. */
5054 gfc_simplify_expr (e
->ts
.u
.cl
->length
, 1);
5055 gfc_resolve_expr (e
->ts
.u
.cl
->length
);
5059 /* Resolve subtype references. */
5062 resolve_ref (gfc_expr
*expr
)
5064 int current_part_dimension
, n_components
, seen_part_dimension
;
5065 gfc_ref
*ref
, **prev
;
5068 for (ref
= expr
->ref
; ref
; ref
= ref
->next
)
5069 if (ref
->type
== REF_ARRAY
&& ref
->u
.ar
.as
== NULL
)
5071 find_array_spec (expr
);
5075 for (prev
= &expr
->ref
; *prev
!= NULL
;
5076 prev
= *prev
== NULL
? prev
: &(*prev
)->next
)
5077 switch ((*prev
)->type
)
5080 if (!resolve_array_ref (&(*prev
)->u
.ar
))
5089 equal_length
= false;
5090 if (!resolve_substring (*prev
, &equal_length
))
5093 if (expr
->expr_type
!= EXPR_SUBSTRING
&& equal_length
)
5095 /* Remove the reference and move the charlen, if any. */
5099 expr
->ts
.u
.cl
= ref
->u
.ss
.length
;
5100 ref
->u
.ss
.length
= NULL
;
5101 gfc_free_ref_list (ref
);
5106 /* Check constraints on part references. */
5108 current_part_dimension
= 0;
5109 seen_part_dimension
= 0;
5112 for (ref
= expr
->ref
; ref
; ref
= ref
->next
)
5117 switch (ref
->u
.ar
.type
)
5120 /* Coarray scalar. */
5121 if (ref
->u
.ar
.as
->rank
== 0)
5123 current_part_dimension
= 0;
5128 current_part_dimension
= 1;
5132 current_part_dimension
= 0;
5136 gfc_internal_error ("resolve_ref(): Bad array reference");
5142 if (current_part_dimension
|| seen_part_dimension
)
5145 if (ref
->u
.c
.component
->attr
.pointer
5146 || ref
->u
.c
.component
->attr
.proc_pointer
5147 || (ref
->u
.c
.component
->ts
.type
== BT_CLASS
5148 && CLASS_DATA (ref
->u
.c
.component
)->attr
.pointer
))
5150 gfc_error ("Component to the right of a part reference "
5151 "with nonzero rank must not have the POINTER "
5152 "attribute at %L", &expr
->where
);
5155 else if (ref
->u
.c
.component
->attr
.allocatable
5156 || (ref
->u
.c
.component
->ts
.type
== BT_CLASS
5157 && CLASS_DATA (ref
->u
.c
.component
)->attr
.allocatable
))
5160 gfc_error ("Component to the right of a part reference "
5161 "with nonzero rank must not have the ALLOCATABLE "
5162 "attribute at %L", &expr
->where
);
5175 if (((ref
->type
== REF_COMPONENT
&& n_components
> 1)
5176 || ref
->next
== NULL
)
5177 && current_part_dimension
5178 && seen_part_dimension
)
5180 gfc_error ("Two or more part references with nonzero rank must "
5181 "not be specified at %L", &expr
->where
);
5185 if (ref
->type
== REF_COMPONENT
)
5187 if (current_part_dimension
)
5188 seen_part_dimension
= 1;
5190 /* reset to make sure */
5191 current_part_dimension
= 0;
5199 /* Given an expression, determine its shape. This is easier than it sounds.
5200 Leaves the shape array NULL if it is not possible to determine the shape. */
5203 expression_shape (gfc_expr
*e
)
5205 mpz_t array
[GFC_MAX_DIMENSIONS
];
5208 if (e
->rank
<= 0 || e
->shape
!= NULL
)
5211 for (i
= 0; i
< e
->rank
; i
++)
5212 if (!gfc_array_dimen_size (e
, i
, &array
[i
]))
5215 e
->shape
= gfc_get_shape (e
->rank
);
5217 memcpy (e
->shape
, array
, e
->rank
* sizeof (mpz_t
));
5222 for (i
--; i
>= 0; i
--)
5223 mpz_clear (array
[i
]);
5227 /* Given a variable expression node, compute the rank of the expression by
5228 examining the base symbol and any reference structures it may have. */
5231 expression_rank (gfc_expr
*e
)
5236 /* Just to make sure, because EXPR_COMPCALL's also have an e->ref and that
5237 could lead to serious confusion... */
5238 gcc_assert (e
->expr_type
!= EXPR_COMPCALL
);
5242 if (e
->expr_type
== EXPR_ARRAY
)
5244 /* Constructors can have a rank different from one via RESHAPE(). */
5246 if (e
->symtree
== NULL
)
5252 e
->rank
= (e
->symtree
->n
.sym
->as
== NULL
)
5253 ? 0 : e
->symtree
->n
.sym
->as
->rank
;
5259 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
5261 if (ref
->type
== REF_COMPONENT
&& ref
->u
.c
.component
->attr
.proc_pointer
5262 && ref
->u
.c
.component
->attr
.function
&& !ref
->next
)
5263 rank
= ref
->u
.c
.component
->as
? ref
->u
.c
.component
->as
->rank
: 0;
5265 if (ref
->type
!= REF_ARRAY
)
5268 if (ref
->u
.ar
.type
== AR_FULL
)
5270 rank
= ref
->u
.ar
.as
->rank
;
5274 if (ref
->u
.ar
.type
== AR_SECTION
)
5276 /* Figure out the rank of the section. */
5278 gfc_internal_error ("expression_rank(): Two array specs");
5280 for (i
= 0; i
< ref
->u
.ar
.dimen
; i
++)
5281 if (ref
->u
.ar
.dimen_type
[i
] == DIMEN_RANGE
5282 || ref
->u
.ar
.dimen_type
[i
] == DIMEN_VECTOR
)
5292 expression_shape (e
);
5297 add_caf_get_intrinsic (gfc_expr
*e
)
5299 gfc_expr
*wrapper
, *tmp_expr
;
5303 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
5304 if (ref
->type
== REF_ARRAY
&& ref
->u
.ar
.codimen
> 0)
5309 for (n
= ref
->u
.ar
.dimen
; n
< ref
->u
.ar
.dimen
+ ref
->u
.ar
.codimen
; n
++)
5310 if (ref
->u
.ar
.dimen_type
[n
] != DIMEN_ELEMENT
)
5313 tmp_expr
= XCNEW (gfc_expr
);
5315 wrapper
= gfc_build_intrinsic_call (gfc_current_ns
, GFC_ISYM_CAF_GET
,
5316 "caf_get", tmp_expr
->where
, 1, tmp_expr
);
5317 wrapper
->ts
= e
->ts
;
5318 wrapper
->rank
= e
->rank
;
5320 wrapper
->shape
= gfc_copy_shape (e
->shape
, e
->rank
);
5327 remove_caf_get_intrinsic (gfc_expr
*e
)
5329 gcc_assert (e
->expr_type
== EXPR_FUNCTION
&& e
->value
.function
.isym
5330 && e
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
);
5331 gfc_expr
*e2
= e
->value
.function
.actual
->expr
;
5332 e
->value
.function
.actual
->expr
= NULL
;
5333 gfc_free_actual_arglist (e
->value
.function
.actual
);
5334 gfc_free_shape (&e
->shape
, e
->rank
);
5340 /* Resolve a variable expression. */
5343 resolve_variable (gfc_expr
*e
)
5350 if (e
->symtree
== NULL
)
5352 sym
= e
->symtree
->n
.sym
;
5354 /* Use same check as for TYPE(*) below; this check has to be before TYPE(*)
5355 as ts.type is set to BT_ASSUMED in resolve_symbol. */
5356 if (sym
->attr
.ext_attr
& (1 << EXT_ATTR_NO_ARG_CHECK
))
5358 if (!actual_arg
|| inquiry_argument
)
5360 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute may only "
5361 "be used as actual argument", sym
->name
, &e
->where
);
5365 /* TS 29113, 407b. */
5366 else if (e
->ts
.type
== BT_ASSUMED
)
5370 gfc_error ("Assumed-type variable %s at %L may only be used "
5371 "as actual argument", sym
->name
, &e
->where
);
5374 else if (inquiry_argument
&& !first_actual_arg
)
5376 /* FIXME: It doesn't work reliably as inquiry_argument is not set
5377 for all inquiry functions in resolve_function; the reason is
5378 that the function-name resolution happens too late in that
5380 gfc_error ("Assumed-type variable %s at %L as actual argument to "
5381 "an inquiry function shall be the first argument",
5382 sym
->name
, &e
->where
);
5386 /* TS 29113, C535b. */
5387 else if ((sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
5388 && CLASS_DATA (sym
)->as
5389 && CLASS_DATA (sym
)->as
->type
== AS_ASSUMED_RANK
)
5390 || (sym
->ts
.type
!= BT_CLASS
&& sym
->as
5391 && sym
->as
->type
== AS_ASSUMED_RANK
))
5395 gfc_error ("Assumed-rank variable %s at %L may only be used as "
5396 "actual argument", sym
->name
, &e
->where
);
5399 else if (inquiry_argument
&& !first_actual_arg
)
5401 /* FIXME: It doesn't work reliably as inquiry_argument is not set
5402 for all inquiry functions in resolve_function; the reason is
5403 that the function-name resolution happens too late in that
5405 gfc_error ("Assumed-rank variable %s at %L as actual argument "
5406 "to an inquiry function shall be the first argument",
5407 sym
->name
, &e
->where
);
5412 if ((sym
->attr
.ext_attr
& (1 << EXT_ATTR_NO_ARG_CHECK
)) && e
->ref
5413 && !(e
->ref
->type
== REF_ARRAY
&& e
->ref
->u
.ar
.type
== AR_FULL
5414 && e
->ref
->next
== NULL
))
5416 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute shall not have "
5417 "a subobject reference", sym
->name
, &e
->ref
->u
.ar
.where
);
5420 /* TS 29113, 407b. */
5421 else if (e
->ts
.type
== BT_ASSUMED
&& e
->ref
5422 && !(e
->ref
->type
== REF_ARRAY
&& e
->ref
->u
.ar
.type
== AR_FULL
5423 && e
->ref
->next
== NULL
))
5425 gfc_error ("Assumed-type variable %s at %L shall not have a subobject "
5426 "reference", sym
->name
, &e
->ref
->u
.ar
.where
);
5430 /* TS 29113, C535b. */
5431 if (((sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
5432 && CLASS_DATA (sym
)->as
5433 && CLASS_DATA (sym
)->as
->type
== AS_ASSUMED_RANK
)
5434 || (sym
->ts
.type
!= BT_CLASS
&& sym
->as
5435 && sym
->as
->type
== AS_ASSUMED_RANK
))
5437 && !(e
->ref
->type
== REF_ARRAY
&& e
->ref
->u
.ar
.type
== AR_FULL
5438 && e
->ref
->next
== NULL
))
5440 gfc_error ("Assumed-rank variable %s at %L shall not have a subobject "
5441 "reference", sym
->name
, &e
->ref
->u
.ar
.where
);
5445 /* For variables that are used in an associate (target => object) where
5446 the object's basetype is array valued while the target is scalar,
5447 the ts' type of the component refs is still array valued, which
5448 can't be translated that way. */
5449 if (sym
->assoc
&& e
->rank
== 0 && e
->ref
&& sym
->ts
.type
== BT_CLASS
5450 && sym
->assoc
->target
&& sym
->assoc
->target
->ts
.type
== BT_CLASS
5451 && CLASS_DATA (sym
->assoc
->target
)->as
)
5453 gfc_ref
*ref
= e
->ref
;
5459 ref
->u
.c
.sym
= sym
->ts
.u
.derived
;
5460 /* Stop the loop. */
5470 /* If this is an associate-name, it may be parsed with an array reference
5471 in error even though the target is scalar. Fail directly in this case.
5472 TODO Understand why class scalar expressions must be excluded. */
5473 if (sym
->assoc
&& !(sym
->ts
.type
== BT_CLASS
&& e
->rank
== 0))
5475 if (sym
->ts
.type
== BT_CLASS
)
5476 gfc_fix_class_refs (e
);
5477 if (!sym
->attr
.dimension
&& e
->ref
&& e
->ref
->type
== REF_ARRAY
)
5479 else if (sym
->attr
.dimension
&& (!e
->ref
|| e
->ref
->type
!= REF_ARRAY
))
5481 /* This can happen because the parser did not detect that the
5482 associate name is an array and the expression had no array
5484 gfc_ref
*ref
= gfc_get_ref ();
5485 ref
->type
= REF_ARRAY
;
5486 ref
->u
.ar
= *gfc_get_array_ref();
5487 ref
->u
.ar
.type
= AR_FULL
;
5490 ref
->u
.ar
.as
= sym
->as
;
5491 ref
->u
.ar
.dimen
= sym
->as
->rank
;
5499 if (sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
->attr
.generic
)
5500 sym
->ts
.u
.derived
= gfc_find_dt_in_generic (sym
->ts
.u
.derived
);
5502 /* On the other hand, the parser may not have known this is an array;
5503 in this case, we have to add a FULL reference. */
5504 if (sym
->assoc
&& sym
->attr
.dimension
&& !e
->ref
)
5506 e
->ref
= gfc_get_ref ();
5507 e
->ref
->type
= REF_ARRAY
;
5508 e
->ref
->u
.ar
.type
= AR_FULL
;
5509 e
->ref
->u
.ar
.dimen
= 0;
5512 /* Like above, but for class types, where the checking whether an array
5513 ref is present is more complicated. Furthermore make sure not to add
5514 the full array ref to _vptr or _len refs. */
5515 if (sym
->assoc
&& sym
->ts
.type
== BT_CLASS
5516 && CLASS_DATA (sym
)->attr
.dimension
5517 && (e
->ts
.type
!= BT_DERIVED
|| !e
->ts
.u
.derived
->attr
.vtype
))
5519 gfc_ref
*ref
, *newref
;
5521 newref
= gfc_get_ref ();
5522 newref
->type
= REF_ARRAY
;
5523 newref
->u
.ar
.type
= AR_FULL
;
5524 newref
->u
.ar
.dimen
= 0;
5525 /* Because this is an associate var and the first ref either is a ref to
5526 the _data component or not, no traversal of the ref chain is
5527 needed. The array ref needs to be inserted after the _data ref,
5528 or when that is not present, which may happend for polymorphic
5529 types, then at the first position. */
5533 else if (ref
->type
== REF_COMPONENT
5534 && strcmp ("_data", ref
->u
.c
.component
->name
) == 0)
5536 if (!ref
->next
|| ref
->next
->type
!= REF_ARRAY
)
5538 newref
->next
= ref
->next
;
5542 /* Array ref present already. */
5543 gfc_free_ref_list (newref
);
5545 else if (ref
->type
== REF_ARRAY
)
5546 /* Array ref present already. */
5547 gfc_free_ref_list (newref
);
5555 if (e
->ref
&& !resolve_ref (e
))
5558 if (sym
->attr
.flavor
== FL_PROCEDURE
5559 && (!sym
->attr
.function
5560 || (sym
->attr
.function
&& sym
->result
5561 && sym
->result
->attr
.proc_pointer
5562 && !sym
->result
->attr
.function
)))
5564 e
->ts
.type
= BT_PROCEDURE
;
5565 goto resolve_procedure
;
5568 if (sym
->ts
.type
!= BT_UNKNOWN
)
5569 gfc_variable_attr (e
, &e
->ts
);
5570 else if (sym
->attr
.flavor
== FL_PROCEDURE
5571 && sym
->attr
.function
&& sym
->result
5572 && sym
->result
->ts
.type
!= BT_UNKNOWN
5573 && sym
->result
->attr
.proc_pointer
)
5574 e
->ts
= sym
->result
->ts
;
5577 /* Must be a simple variable reference. */
5578 if (!gfc_set_default_type (sym
, 1, sym
->ns
))
5583 if (check_assumed_size_reference (sym
, e
))
5586 /* Deal with forward references to entries during gfc_resolve_code, to
5587 satisfy, at least partially, 12.5.2.5. */
5588 if (gfc_current_ns
->entries
5589 && current_entry_id
== sym
->entry_id
5592 && cs_base
->current
->op
!= EXEC_ENTRY
)
5594 gfc_entry_list
*entry
;
5595 gfc_formal_arglist
*formal
;
5597 bool seen
, saved_specification_expr
;
5599 /* If the symbol is a dummy... */
5600 if (sym
->attr
.dummy
&& sym
->ns
== gfc_current_ns
)
5602 entry
= gfc_current_ns
->entries
;
5605 /* ...test if the symbol is a parameter of previous entries. */
5606 for (; entry
&& entry
->id
<= current_entry_id
; entry
= entry
->next
)
5607 for (formal
= entry
->sym
->formal
; formal
; formal
= formal
->next
)
5609 if (formal
->sym
&& sym
->name
== formal
->sym
->name
)
5616 /* If it has not been seen as a dummy, this is an error. */
5619 if (specification_expr
)
5620 gfc_error ("Variable %qs, used in a specification expression"
5621 ", is referenced at %L before the ENTRY statement "
5622 "in which it is a parameter",
5623 sym
->name
, &cs_base
->current
->loc
);
5625 gfc_error ("Variable %qs is used at %L before the ENTRY "
5626 "statement in which it is a parameter",
5627 sym
->name
, &cs_base
->current
->loc
);
5632 /* Now do the same check on the specification expressions. */
5633 saved_specification_expr
= specification_expr
;
5634 specification_expr
= true;
5635 if (sym
->ts
.type
== BT_CHARACTER
5636 && !gfc_resolve_expr (sym
->ts
.u
.cl
->length
))
5640 for (n
= 0; n
< sym
->as
->rank
; n
++)
5642 if (!gfc_resolve_expr (sym
->as
->lower
[n
]))
5644 if (!gfc_resolve_expr (sym
->as
->upper
[n
]))
5647 specification_expr
= saved_specification_expr
;
5650 /* Update the symbol's entry level. */
5651 sym
->entry_id
= current_entry_id
+ 1;
5654 /* If a symbol has been host_associated mark it. This is used latter,
5655 to identify if aliasing is possible via host association. */
5656 if (sym
->attr
.flavor
== FL_VARIABLE
5657 && gfc_current_ns
->parent
5658 && (gfc_current_ns
->parent
== sym
->ns
5659 || (gfc_current_ns
->parent
->parent
5660 && gfc_current_ns
->parent
->parent
== sym
->ns
)))
5661 sym
->attr
.host_assoc
= 1;
5663 if (gfc_current_ns
->proc_name
5664 && sym
->attr
.dimension
5665 && (sym
->ns
!= gfc_current_ns
5666 || sym
->attr
.use_assoc
5667 || sym
->attr
.in_common
))
5668 gfc_current_ns
->proc_name
->attr
.array_outer_dependency
= 1;
5671 if (t
&& !resolve_procedure_expression (e
))
5674 /* F2008, C617 and C1229. */
5675 if (!inquiry_argument
&& (e
->ts
.type
== BT_CLASS
|| e
->ts
.type
== BT_DERIVED
)
5676 && gfc_is_coindexed (e
))
5678 gfc_ref
*ref
, *ref2
= NULL
;
5680 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
5682 if (ref
->type
== REF_COMPONENT
)
5684 if (ref
->type
== REF_ARRAY
&& ref
->u
.ar
.codimen
> 0)
5688 for ( ; ref
; ref
= ref
->next
)
5689 if (ref
->type
== REF_COMPONENT
)
5692 /* Expression itself is not coindexed object. */
5693 if (ref
&& e
->ts
.type
== BT_CLASS
)
5695 gfc_error ("Polymorphic subobject of coindexed object at %L",
5700 /* Expression itself is coindexed object. */
5704 c
= ref2
? ref2
->u
.c
.component
: e
->symtree
->n
.sym
->components
;
5705 for ( ; c
; c
= c
->next
)
5706 if (c
->attr
.allocatable
&& c
->ts
.type
== BT_CLASS
)
5708 gfc_error ("Coindexed object with polymorphic allocatable "
5709 "subcomponent at %L", &e
->where
);
5717 expression_rank (e
);
5719 if (t
&& flag_coarray
== GFC_FCOARRAY_LIB
&& gfc_is_coindexed (e
))
5720 add_caf_get_intrinsic (e
);
5722 /* Simplify cases where access to a parameter array results in a
5723 single constant. Suppress errors since those will have been
5724 issued before, as warnings. */
5725 if (e
->rank
== 0 && sym
->as
&& sym
->attr
.flavor
== FL_PARAMETER
)
5727 gfc_push_suppress_errors ();
5728 gfc_simplify_expr (e
, 1);
5729 gfc_pop_suppress_errors ();
5736 /* Checks to see that the correct symbol has been host associated.
5737 The only situation where this arises is that in which a twice
5738 contained function is parsed after the host association is made.
5739 Therefore, on detecting this, change the symbol in the expression
5740 and convert the array reference into an actual arglist if the old
5741 symbol is a variable. */
5743 check_host_association (gfc_expr
*e
)
5745 gfc_symbol
*sym
, *old_sym
;
5749 gfc_actual_arglist
*arg
, *tail
= NULL
;
5750 bool retval
= e
->expr_type
== EXPR_FUNCTION
;
5752 /* If the expression is the result of substitution in
5753 interface.c(gfc_extend_expr) because there is no way in
5754 which the host association can be wrong. */
5755 if (e
->symtree
== NULL
5756 || e
->symtree
->n
.sym
== NULL
5757 || e
->user_operator
)
5760 old_sym
= e
->symtree
->n
.sym
;
5762 if (gfc_current_ns
->parent
5763 && old_sym
->ns
!= gfc_current_ns
)
5765 /* Use the 'USE' name so that renamed module symbols are
5766 correctly handled. */
5767 gfc_find_symbol (e
->symtree
->name
, gfc_current_ns
, 1, &sym
);
5769 if (sym
&& old_sym
!= sym
5770 && sym
->ts
.type
== old_sym
->ts
.type
5771 && sym
->attr
.flavor
== FL_PROCEDURE
5772 && sym
->attr
.contained
)
5774 /* Clear the shape, since it might not be valid. */
5775 gfc_free_shape (&e
->shape
, e
->rank
);
5777 /* Give the expression the right symtree! */
5778 gfc_find_sym_tree (e
->symtree
->name
, NULL
, 1, &st
);
5779 gcc_assert (st
!= NULL
);
5781 if (old_sym
->attr
.flavor
== FL_PROCEDURE
5782 || e
->expr_type
== EXPR_FUNCTION
)
5784 /* Original was function so point to the new symbol, since
5785 the actual argument list is already attached to the
5787 e
->value
.function
.esym
= NULL
;
5792 /* Original was variable so convert array references into
5793 an actual arglist. This does not need any checking now
5794 since resolve_function will take care of it. */
5795 e
->value
.function
.actual
= NULL
;
5796 e
->expr_type
= EXPR_FUNCTION
;
5799 /* Ambiguity will not arise if the array reference is not
5800 the last reference. */
5801 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
5802 if (ref
->type
== REF_ARRAY
&& ref
->next
== NULL
)
5805 gcc_assert (ref
->type
== REF_ARRAY
);
5807 /* Grab the start expressions from the array ref and
5808 copy them into actual arguments. */
5809 for (n
= 0; n
< ref
->u
.ar
.dimen
; n
++)
5811 arg
= gfc_get_actual_arglist ();
5812 arg
->expr
= gfc_copy_expr (ref
->u
.ar
.start
[n
]);
5813 if (e
->value
.function
.actual
== NULL
)
5814 tail
= e
->value
.function
.actual
= arg
;
5822 /* Dump the reference list and set the rank. */
5823 gfc_free_ref_list (e
->ref
);
5825 e
->rank
= sym
->as
? sym
->as
->rank
: 0;
5828 gfc_resolve_expr (e
);
5832 /* This might have changed! */
5833 return e
->expr_type
== EXPR_FUNCTION
;
5838 gfc_resolve_character_operator (gfc_expr
*e
)
5840 gfc_expr
*op1
= e
->value
.op
.op1
;
5841 gfc_expr
*op2
= e
->value
.op
.op2
;
5842 gfc_expr
*e1
= NULL
;
5843 gfc_expr
*e2
= NULL
;
5845 gcc_assert (e
->value
.op
.op
== INTRINSIC_CONCAT
);
5847 if (op1
->ts
.u
.cl
&& op1
->ts
.u
.cl
->length
)
5848 e1
= gfc_copy_expr (op1
->ts
.u
.cl
->length
);
5849 else if (op1
->expr_type
== EXPR_CONSTANT
)
5850 e1
= gfc_get_int_expr (gfc_charlen_int_kind
, NULL
,
5851 op1
->value
.character
.length
);
5853 if (op2
->ts
.u
.cl
&& op2
->ts
.u
.cl
->length
)
5854 e2
= gfc_copy_expr (op2
->ts
.u
.cl
->length
);
5855 else if (op2
->expr_type
== EXPR_CONSTANT
)
5856 e2
= gfc_get_int_expr (gfc_charlen_int_kind
, NULL
,
5857 op2
->value
.character
.length
);
5859 e
->ts
.u
.cl
= gfc_new_charlen (gfc_current_ns
, NULL
);
5869 e
->ts
.u
.cl
->length
= gfc_add (e1
, e2
);
5870 e
->ts
.u
.cl
->length
->ts
.type
= BT_INTEGER
;
5871 e
->ts
.u
.cl
->length
->ts
.kind
= gfc_charlen_int_kind
;
5872 gfc_simplify_expr (e
->ts
.u
.cl
->length
, 0);
5873 gfc_resolve_expr (e
->ts
.u
.cl
->length
);
5879 /* Ensure that an character expression has a charlen and, if possible, a
5880 length expression. */
5883 fixup_charlen (gfc_expr
*e
)
5885 /* The cases fall through so that changes in expression type and the need
5886 for multiple fixes are picked up. In all circumstances, a charlen should
5887 be available for the middle end to hang a backend_decl on. */
5888 switch (e
->expr_type
)
5891 gfc_resolve_character_operator (e
);
5895 if (e
->expr_type
== EXPR_ARRAY
)
5896 gfc_resolve_character_array_constructor (e
);
5899 case EXPR_SUBSTRING
:
5900 if (!e
->ts
.u
.cl
&& e
->ref
)
5901 gfc_resolve_substring_charlen (e
);
5906 e
->ts
.u
.cl
= gfc_new_charlen (gfc_current_ns
, NULL
);
5913 /* Update an actual argument to include the passed-object for type-bound
5914 procedures at the right position. */
5916 static gfc_actual_arglist
*
5917 update_arglist_pass (gfc_actual_arglist
* lst
, gfc_expr
* po
, unsigned argpos
,
5920 gcc_assert (argpos
> 0);
5924 gfc_actual_arglist
* result
;
5926 result
= gfc_get_actual_arglist ();
5930 result
->name
= name
;
5936 lst
->next
= update_arglist_pass (lst
->next
, po
, argpos
- 1, name
);
5938 lst
= update_arglist_pass (NULL
, po
, argpos
- 1, name
);
5943 /* Extract the passed-object from an EXPR_COMPCALL (a copy of it). */
5946 extract_compcall_passed_object (gfc_expr
* e
)
5950 if (e
->expr_type
== EXPR_UNKNOWN
)
5952 gfc_error ("Error in typebound call at %L",
5957 gcc_assert (e
->expr_type
== EXPR_COMPCALL
);
5959 if (e
->value
.compcall
.base_object
)
5960 po
= gfc_copy_expr (e
->value
.compcall
.base_object
);
5963 po
= gfc_get_expr ();
5964 po
->expr_type
= EXPR_VARIABLE
;
5965 po
->symtree
= e
->symtree
;
5966 po
->ref
= gfc_copy_ref (e
->ref
);
5967 po
->where
= e
->where
;
5970 if (!gfc_resolve_expr (po
))
5977 /* Update the arglist of an EXPR_COMPCALL expression to include the
5981 update_compcall_arglist (gfc_expr
* e
)
5984 gfc_typebound_proc
* tbp
;
5986 tbp
= e
->value
.compcall
.tbp
;
5991 po
= extract_compcall_passed_object (e
);
5995 if (tbp
->nopass
|| e
->value
.compcall
.ignore_pass
)
6001 if (tbp
->pass_arg_num
<= 0)
6004 e
->value
.compcall
.actual
= update_arglist_pass (e
->value
.compcall
.actual
, po
,
6012 /* Extract the passed object from a PPC call (a copy of it). */
6015 extract_ppc_passed_object (gfc_expr
*e
)
6020 po
= gfc_get_expr ();
6021 po
->expr_type
= EXPR_VARIABLE
;
6022 po
->symtree
= e
->symtree
;
6023 po
->ref
= gfc_copy_ref (e
->ref
);
6024 po
->where
= e
->where
;
6026 /* Remove PPC reference. */
6028 while ((*ref
)->next
)
6029 ref
= &(*ref
)->next
;
6030 gfc_free_ref_list (*ref
);
6033 if (!gfc_resolve_expr (po
))
6040 /* Update the actual arglist of a procedure pointer component to include the
6044 update_ppc_arglist (gfc_expr
* e
)
6048 gfc_typebound_proc
* tb
;
6050 ppc
= gfc_get_proc_ptr_comp (e
);
6058 else if (tb
->nopass
)
6061 po
= extract_ppc_passed_object (e
);
6068 gfc_error ("Passed-object at %L must be scalar", &e
->where
);
6073 if (po
->ts
.type
== BT_DERIVED
&& po
->ts
.u
.derived
->attr
.abstract
)
6075 gfc_error ("Base object for procedure-pointer component call at %L is of"
6076 " ABSTRACT type %qs", &e
->where
, po
->ts
.u
.derived
->name
);
6080 gcc_assert (tb
->pass_arg_num
> 0);
6081 e
->value
.compcall
.actual
= update_arglist_pass (e
->value
.compcall
.actual
, po
,
6089 /* Check that the object a TBP is called on is valid, i.e. it must not be
6090 of ABSTRACT type (as in subobject%abstract_parent%tbp()). */
6093 check_typebound_baseobject (gfc_expr
* e
)
6096 bool return_value
= false;
6098 base
= extract_compcall_passed_object (e
);
6102 if (base
->ts
.type
!= BT_DERIVED
&& base
->ts
.type
!= BT_CLASS
)
6104 gfc_error ("Error in typebound call at %L", &e
->where
);
6108 if (base
->ts
.type
== BT_CLASS
&& !gfc_expr_attr (base
).class_ok
)
6112 if (base
->ts
.type
== BT_DERIVED
&& base
->ts
.u
.derived
->attr
.abstract
)
6114 gfc_error ("Base object for type-bound procedure call at %L is of"
6115 " ABSTRACT type %qs", &e
->where
, base
->ts
.u
.derived
->name
);
6119 /* F08:C1230. If the procedure called is NOPASS,
6120 the base object must be scalar. */
6121 if (e
->value
.compcall
.tbp
->nopass
&& base
->rank
!= 0)
6123 gfc_error ("Base object for NOPASS type-bound procedure call at %L must"
6124 " be scalar", &e
->where
);
6128 return_value
= true;
6131 gfc_free_expr (base
);
6132 return return_value
;
6136 /* Resolve a call to a type-bound procedure, either function or subroutine,
6137 statically from the data in an EXPR_COMPCALL expression. The adapted
6138 arglist and the target-procedure symtree are returned. */
6141 resolve_typebound_static (gfc_expr
* e
, gfc_symtree
** target
,
6142 gfc_actual_arglist
** actual
)
6144 gcc_assert (e
->expr_type
== EXPR_COMPCALL
);
6145 gcc_assert (!e
->value
.compcall
.tbp
->is_generic
);
6147 /* Update the actual arglist for PASS. */
6148 if (!update_compcall_arglist (e
))
6151 *actual
= e
->value
.compcall
.actual
;
6152 *target
= e
->value
.compcall
.tbp
->u
.specific
;
6154 gfc_free_ref_list (e
->ref
);
6156 e
->value
.compcall
.actual
= NULL
;
6158 /* If we find a deferred typebound procedure, check for derived types
6159 that an overriding typebound procedure has not been missed. */
6160 if (e
->value
.compcall
.name
6161 && !e
->value
.compcall
.tbp
->non_overridable
6162 && e
->value
.compcall
.base_object
6163 && e
->value
.compcall
.base_object
->ts
.type
== BT_DERIVED
)
6166 gfc_symbol
*derived
;
6168 /* Use the derived type of the base_object. */
6169 derived
= e
->value
.compcall
.base_object
->ts
.u
.derived
;
6172 /* If necessary, go through the inheritance chain. */
6173 while (!st
&& derived
)
6175 /* Look for the typebound procedure 'name'. */
6176 if (derived
->f2k_derived
&& derived
->f2k_derived
->tb_sym_root
)
6177 st
= gfc_find_symtree (derived
->f2k_derived
->tb_sym_root
,
6178 e
->value
.compcall
.name
);
6180 derived
= gfc_get_derived_super_type (derived
);
6183 /* Now find the specific name in the derived type namespace. */
6184 if (st
&& st
->n
.tb
&& st
->n
.tb
->u
.specific
)
6185 gfc_find_sym_tree (st
->n
.tb
->u
.specific
->name
,
6186 derived
->ns
, 1, &st
);
6194 /* Get the ultimate declared type from an expression. In addition,
6195 return the last class/derived type reference and the copy of the
6196 reference list. If check_types is set true, derived types are
6197 identified as well as class references. */
6199 get_declared_from_expr (gfc_ref
**class_ref
, gfc_ref
**new_ref
,
6200 gfc_expr
*e
, bool check_types
)
6202 gfc_symbol
*declared
;
6209 *new_ref
= gfc_copy_ref (e
->ref
);
6211 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
6213 if (ref
->type
!= REF_COMPONENT
)
6216 if ((ref
->u
.c
.component
->ts
.type
== BT_CLASS
6217 || (check_types
&& gfc_bt_struct (ref
->u
.c
.component
->ts
.type
)))
6218 && ref
->u
.c
.component
->attr
.flavor
!= FL_PROCEDURE
)
6220 declared
= ref
->u
.c
.component
->ts
.u
.derived
;
6226 if (declared
== NULL
)
6227 declared
= e
->symtree
->n
.sym
->ts
.u
.derived
;
6233 /* Given an EXPR_COMPCALL calling a GENERIC typebound procedure, figure out
6234 which of the specific bindings (if any) matches the arglist and transform
6235 the expression into a call of that binding. */
6238 resolve_typebound_generic_call (gfc_expr
* e
, const char **name
)
6240 gfc_typebound_proc
* genproc
;
6241 const char* genname
;
6243 gfc_symbol
*derived
;
6245 gcc_assert (e
->expr_type
== EXPR_COMPCALL
);
6246 genname
= e
->value
.compcall
.name
;
6247 genproc
= e
->value
.compcall
.tbp
;
6249 if (!genproc
->is_generic
)
6252 /* Try the bindings on this type and in the inheritance hierarchy. */
6253 for (; genproc
; genproc
= genproc
->overridden
)
6257 gcc_assert (genproc
->is_generic
);
6258 for (g
= genproc
->u
.generic
; g
; g
= g
->next
)
6261 gfc_actual_arglist
* args
;
6264 gcc_assert (g
->specific
);
6266 if (g
->specific
->error
)
6269 target
= g
->specific
->u
.specific
->n
.sym
;
6271 /* Get the right arglist by handling PASS/NOPASS. */
6272 args
= gfc_copy_actual_arglist (e
->value
.compcall
.actual
);
6273 if (!g
->specific
->nopass
)
6276 po
= extract_compcall_passed_object (e
);
6279 gfc_free_actual_arglist (args
);
6283 gcc_assert (g
->specific
->pass_arg_num
> 0);
6284 gcc_assert (!g
->specific
->error
);
6285 args
= update_arglist_pass (args
, po
, g
->specific
->pass_arg_num
,
6286 g
->specific
->pass_arg
);
6288 resolve_actual_arglist (args
, target
->attr
.proc
,
6289 is_external_proc (target
)
6290 && gfc_sym_get_dummy_args (target
) == NULL
);
6292 /* Check if this arglist matches the formal. */
6293 matches
= gfc_arglist_matches_symbol (&args
, target
);
6295 /* Clean up and break out of the loop if we've found it. */
6296 gfc_free_actual_arglist (args
);
6299 e
->value
.compcall
.tbp
= g
->specific
;
6300 genname
= g
->specific_st
->name
;
6301 /* Pass along the name for CLASS methods, where the vtab
6302 procedure pointer component has to be referenced. */
6310 /* Nothing matching found! */
6311 gfc_error ("Found no matching specific binding for the call to the GENERIC"
6312 " %qs at %L", genname
, &e
->where
);
6316 /* Make sure that we have the right specific instance for the name. */
6317 derived
= get_declared_from_expr (NULL
, NULL
, e
, true);
6319 st
= gfc_find_typebound_proc (derived
, NULL
, genname
, true, &e
->where
);
6321 e
->value
.compcall
.tbp
= st
->n
.tb
;
6327 /* Resolve a call to a type-bound subroutine. */
6330 resolve_typebound_call (gfc_code
* c
, const char **name
, bool *overridable
)
6332 gfc_actual_arglist
* newactual
;
6333 gfc_symtree
* target
;
6335 /* Check that's really a SUBROUTINE. */
6336 if (!c
->expr1
->value
.compcall
.tbp
->subroutine
)
6338 if (!c
->expr1
->value
.compcall
.tbp
->is_generic
6339 && c
->expr1
->value
.compcall
.tbp
->u
.specific
6340 && c
->expr1
->value
.compcall
.tbp
->u
.specific
->n
.sym
6341 && c
->expr1
->value
.compcall
.tbp
->u
.specific
->n
.sym
->attr
.subroutine
)
6342 c
->expr1
->value
.compcall
.tbp
->subroutine
= 1;
6345 gfc_error ("%qs at %L should be a SUBROUTINE",
6346 c
->expr1
->value
.compcall
.name
, &c
->loc
);
6351 if (!check_typebound_baseobject (c
->expr1
))
6354 /* Pass along the name for CLASS methods, where the vtab
6355 procedure pointer component has to be referenced. */
6357 *name
= c
->expr1
->value
.compcall
.name
;
6359 if (!resolve_typebound_generic_call (c
->expr1
, name
))
6362 /* Pass along the NON_OVERRIDABLE attribute of the specific TBP. */
6364 *overridable
= !c
->expr1
->value
.compcall
.tbp
->non_overridable
;
6366 /* Transform into an ordinary EXEC_CALL for now. */
6368 if (!resolve_typebound_static (c
->expr1
, &target
, &newactual
))
6371 c
->ext
.actual
= newactual
;
6372 c
->symtree
= target
;
6373 c
->op
= (c
->expr1
->value
.compcall
.assign
? EXEC_ASSIGN_CALL
: EXEC_CALL
);
6375 gcc_assert (!c
->expr1
->ref
&& !c
->expr1
->value
.compcall
.actual
);
6377 gfc_free_expr (c
->expr1
);
6378 c
->expr1
= gfc_get_expr ();
6379 c
->expr1
->expr_type
= EXPR_FUNCTION
;
6380 c
->expr1
->symtree
= target
;
6381 c
->expr1
->where
= c
->loc
;
6383 return resolve_call (c
);
6387 /* Resolve a component-call expression. */
6389 resolve_compcall (gfc_expr
* e
, const char **name
)
6391 gfc_actual_arglist
* newactual
;
6392 gfc_symtree
* target
;
6394 /* Check that's really a FUNCTION. */
6395 if (!e
->value
.compcall
.tbp
->function
)
6397 gfc_error ("%qs at %L should be a FUNCTION",
6398 e
->value
.compcall
.name
, &e
->where
);
6402 /* These must not be assign-calls! */
6403 gcc_assert (!e
->value
.compcall
.assign
);
6405 if (!check_typebound_baseobject (e
))
6408 /* Pass along the name for CLASS methods, where the vtab
6409 procedure pointer component has to be referenced. */
6411 *name
= e
->value
.compcall
.name
;
6413 if (!resolve_typebound_generic_call (e
, name
))
6415 gcc_assert (!e
->value
.compcall
.tbp
->is_generic
);
6417 /* Take the rank from the function's symbol. */
6418 if (e
->value
.compcall
.tbp
->u
.specific
->n
.sym
->as
)
6419 e
->rank
= e
->value
.compcall
.tbp
->u
.specific
->n
.sym
->as
->rank
;
6421 /* For now, we simply transform it into an EXPR_FUNCTION call with the same
6422 arglist to the TBP's binding target. */
6424 if (!resolve_typebound_static (e
, &target
, &newactual
))
6427 e
->value
.function
.actual
= newactual
;
6428 e
->value
.function
.name
= NULL
;
6429 e
->value
.function
.esym
= target
->n
.sym
;
6430 e
->value
.function
.isym
= NULL
;
6431 e
->symtree
= target
;
6432 e
->ts
= target
->n
.sym
->ts
;
6433 e
->expr_type
= EXPR_FUNCTION
;
6435 /* Resolution is not necessary if this is a class subroutine; this
6436 function only has to identify the specific proc. Resolution of
6437 the call will be done next in resolve_typebound_call. */
6438 return gfc_resolve_expr (e
);
6442 static bool resolve_fl_derived (gfc_symbol
*sym
);
6445 /* Resolve a typebound function, or 'method'. First separate all
6446 the non-CLASS references by calling resolve_compcall directly. */
6449 resolve_typebound_function (gfc_expr
* e
)
6451 gfc_symbol
*declared
;
6463 /* Deal with typebound operators for CLASS objects. */
6464 expr
= e
->value
.compcall
.base_object
;
6465 overridable
= !e
->value
.compcall
.tbp
->non_overridable
;
6466 if (expr
&& expr
->ts
.type
== BT_CLASS
&& e
->value
.compcall
.name
)
6468 /* If the base_object is not a variable, the corresponding actual
6469 argument expression must be stored in e->base_expression so
6470 that the corresponding tree temporary can be used as the base
6471 object in gfc_conv_procedure_call. */
6472 if (expr
->expr_type
!= EXPR_VARIABLE
)
6474 gfc_actual_arglist
*args
;
6476 for (args
= e
->value
.function
.actual
; args
; args
= args
->next
)
6478 if (expr
== args
->expr
)
6483 /* Since the typebound operators are generic, we have to ensure
6484 that any delays in resolution are corrected and that the vtab
6487 declared
= ts
.u
.derived
;
6488 c
= gfc_find_component (declared
, "_vptr", true, true, NULL
);
6489 if (c
->ts
.u
.derived
== NULL
)
6490 c
->ts
.u
.derived
= gfc_find_derived_vtab (declared
);
6492 if (!resolve_compcall (e
, &name
))
6495 /* Use the generic name if it is there. */
6496 name
= name
? name
: e
->value
.function
.esym
->name
;
6497 e
->symtree
= expr
->symtree
;
6498 e
->ref
= gfc_copy_ref (expr
->ref
);
6499 get_declared_from_expr (&class_ref
, NULL
, e
, false);
6501 /* Trim away the extraneous references that emerge from nested
6502 use of interface.c (extend_expr). */
6503 if (class_ref
&& class_ref
->next
)
6505 gfc_free_ref_list (class_ref
->next
);
6506 class_ref
->next
= NULL
;
6508 else if (e
->ref
&& !class_ref
&& expr
->ts
.type
!= BT_CLASS
)
6510 gfc_free_ref_list (e
->ref
);
6514 gfc_add_vptr_component (e
);
6515 gfc_add_component_ref (e
, name
);
6516 e
->value
.function
.esym
= NULL
;
6517 if (expr
->expr_type
!= EXPR_VARIABLE
)
6518 e
->base_expr
= expr
;
6523 return resolve_compcall (e
, NULL
);
6525 if (!resolve_ref (e
))
6528 /* Get the CLASS declared type. */
6529 declared
= get_declared_from_expr (&class_ref
, &new_ref
, e
, true);
6531 if (!resolve_fl_derived (declared
))
6534 /* Weed out cases of the ultimate component being a derived type. */
6535 if ((class_ref
&& gfc_bt_struct (class_ref
->u
.c
.component
->ts
.type
))
6536 || (!class_ref
&& st
->n
.sym
->ts
.type
!= BT_CLASS
))
6538 gfc_free_ref_list (new_ref
);
6539 return resolve_compcall (e
, NULL
);
6542 c
= gfc_find_component (declared
, "_data", true, true, NULL
);
6543 declared
= c
->ts
.u
.derived
;
6545 /* Treat the call as if it is a typebound procedure, in order to roll
6546 out the correct name for the specific function. */
6547 if (!resolve_compcall (e
, &name
))
6549 gfc_free_ref_list (new_ref
);
6556 /* Convert the expression to a procedure pointer component call. */
6557 e
->value
.function
.esym
= NULL
;
6563 /* '_vptr' points to the vtab, which contains the procedure pointers. */
6564 gfc_add_vptr_component (e
);
6565 gfc_add_component_ref (e
, name
);
6567 /* Recover the typespec for the expression. This is really only
6568 necessary for generic procedures, where the additional call
6569 to gfc_add_component_ref seems to throw the collection of the
6570 correct typespec. */
6574 gfc_free_ref_list (new_ref
);
6579 /* Resolve a typebound subroutine, or 'method'. First separate all
6580 the non-CLASS references by calling resolve_typebound_call
6584 resolve_typebound_subroutine (gfc_code
*code
)
6586 gfc_symbol
*declared
;
6596 st
= code
->expr1
->symtree
;
6598 /* Deal with typebound operators for CLASS objects. */
6599 expr
= code
->expr1
->value
.compcall
.base_object
;
6600 overridable
= !code
->expr1
->value
.compcall
.tbp
->non_overridable
;
6601 if (expr
&& expr
->ts
.type
== BT_CLASS
&& code
->expr1
->value
.compcall
.name
)
6603 /* If the base_object is not a variable, the corresponding actual
6604 argument expression must be stored in e->base_expression so
6605 that the corresponding tree temporary can be used as the base
6606 object in gfc_conv_procedure_call. */
6607 if (expr
->expr_type
!= EXPR_VARIABLE
)
6609 gfc_actual_arglist
*args
;
6611 args
= code
->expr1
->value
.function
.actual
;
6612 for (; args
; args
= args
->next
)
6613 if (expr
== args
->expr
)
6617 /* Since the typebound operators are generic, we have to ensure
6618 that any delays in resolution are corrected and that the vtab
6620 declared
= expr
->ts
.u
.derived
;
6621 c
= gfc_find_component (declared
, "_vptr", true, true, NULL
);
6622 if (c
->ts
.u
.derived
== NULL
)
6623 c
->ts
.u
.derived
= gfc_find_derived_vtab (declared
);
6625 if (!resolve_typebound_call (code
, &name
, NULL
))
6628 /* Use the generic name if it is there. */
6629 name
= name
? name
: code
->expr1
->value
.function
.esym
->name
;
6630 code
->expr1
->symtree
= expr
->symtree
;
6631 code
->expr1
->ref
= gfc_copy_ref (expr
->ref
);
6633 /* Trim away the extraneous references that emerge from nested
6634 use of interface.c (extend_expr). */
6635 get_declared_from_expr (&class_ref
, NULL
, code
->expr1
, false);
6636 if (class_ref
&& class_ref
->next
)
6638 gfc_free_ref_list (class_ref
->next
);
6639 class_ref
->next
= NULL
;
6641 else if (code
->expr1
->ref
&& !class_ref
)
6643 gfc_free_ref_list (code
->expr1
->ref
);
6644 code
->expr1
->ref
= NULL
;
6647 /* Now use the procedure in the vtable. */
6648 gfc_add_vptr_component (code
->expr1
);
6649 gfc_add_component_ref (code
->expr1
, name
);
6650 code
->expr1
->value
.function
.esym
= NULL
;
6651 if (expr
->expr_type
!= EXPR_VARIABLE
)
6652 code
->expr1
->base_expr
= expr
;
6657 return resolve_typebound_call (code
, NULL
, NULL
);
6659 if (!resolve_ref (code
->expr1
))
6662 /* Get the CLASS declared type. */
6663 get_declared_from_expr (&class_ref
, &new_ref
, code
->expr1
, true);
6665 /* Weed out cases of the ultimate component being a derived type. */
6666 if ((class_ref
&& gfc_bt_struct (class_ref
->u
.c
.component
->ts
.type
))
6667 || (!class_ref
&& st
->n
.sym
->ts
.type
!= BT_CLASS
))
6669 gfc_free_ref_list (new_ref
);
6670 return resolve_typebound_call (code
, NULL
, NULL
);
6673 if (!resolve_typebound_call (code
, &name
, &overridable
))
6675 gfc_free_ref_list (new_ref
);
6678 ts
= code
->expr1
->ts
;
6682 /* Convert the expression to a procedure pointer component call. */
6683 code
->expr1
->value
.function
.esym
= NULL
;
6684 code
->expr1
->symtree
= st
;
6687 code
->expr1
->ref
= new_ref
;
6689 /* '_vptr' points to the vtab, which contains the procedure pointers. */
6690 gfc_add_vptr_component (code
->expr1
);
6691 gfc_add_component_ref (code
->expr1
, name
);
6693 /* Recover the typespec for the expression. This is really only
6694 necessary for generic procedures, where the additional call
6695 to gfc_add_component_ref seems to throw the collection of the
6696 correct typespec. */
6697 code
->expr1
->ts
= ts
;
6700 gfc_free_ref_list (new_ref
);
6706 /* Resolve a CALL to a Procedure Pointer Component (Subroutine). */
6709 resolve_ppc_call (gfc_code
* c
)
6711 gfc_component
*comp
;
6713 comp
= gfc_get_proc_ptr_comp (c
->expr1
);
6714 gcc_assert (comp
!= NULL
);
6716 c
->resolved_sym
= c
->expr1
->symtree
->n
.sym
;
6717 c
->expr1
->expr_type
= EXPR_VARIABLE
;
6719 if (!comp
->attr
.subroutine
)
6720 gfc_add_subroutine (&comp
->attr
, comp
->name
, &c
->expr1
->where
);
6722 if (!resolve_ref (c
->expr1
))
6725 if (!update_ppc_arglist (c
->expr1
))
6728 c
->ext
.actual
= c
->expr1
->value
.compcall
.actual
;
6730 if (!resolve_actual_arglist (c
->ext
.actual
, comp
->attr
.proc
,
6731 !(comp
->ts
.interface
6732 && comp
->ts
.interface
->formal
)))
6735 if (!pure_subroutine (comp
->ts
.interface
, comp
->name
, &c
->expr1
->where
))
6738 gfc_ppc_use (comp
, &c
->expr1
->value
.compcall
.actual
, &c
->expr1
->where
);
6744 /* Resolve a Function Call to a Procedure Pointer Component (Function). */
6747 resolve_expr_ppc (gfc_expr
* e
)
6749 gfc_component
*comp
;
6751 comp
= gfc_get_proc_ptr_comp (e
);
6752 gcc_assert (comp
!= NULL
);
6754 /* Convert to EXPR_FUNCTION. */
6755 e
->expr_type
= EXPR_FUNCTION
;
6756 e
->value
.function
.isym
= NULL
;
6757 e
->value
.function
.actual
= e
->value
.compcall
.actual
;
6759 if (comp
->as
!= NULL
)
6760 e
->rank
= comp
->as
->rank
;
6762 if (!comp
->attr
.function
)
6763 gfc_add_function (&comp
->attr
, comp
->name
, &e
->where
);
6765 if (!resolve_ref (e
))
6768 if (!resolve_actual_arglist (e
->value
.function
.actual
, comp
->attr
.proc
,
6769 !(comp
->ts
.interface
6770 && comp
->ts
.interface
->formal
)))
6773 if (!update_ppc_arglist (e
))
6776 if (!check_pure_function(e
))
6779 gfc_ppc_use (comp
, &e
->value
.compcall
.actual
, &e
->where
);
6786 gfc_is_expandable_expr (gfc_expr
*e
)
6788 gfc_constructor
*con
;
6790 if (e
->expr_type
== EXPR_ARRAY
)
6792 /* Traverse the constructor looking for variables that are flavor
6793 parameter. Parameters must be expanded since they are fully used at
6795 con
= gfc_constructor_first (e
->value
.constructor
);
6796 for (; con
; con
= gfc_constructor_next (con
))
6798 if (con
->expr
->expr_type
== EXPR_VARIABLE
6799 && con
->expr
->symtree
6800 && (con
->expr
->symtree
->n
.sym
->attr
.flavor
== FL_PARAMETER
6801 || con
->expr
->symtree
->n
.sym
->attr
.flavor
== FL_VARIABLE
))
6803 if (con
->expr
->expr_type
== EXPR_ARRAY
6804 && gfc_is_expandable_expr (con
->expr
))
6813 /* Sometimes variables in specification expressions of the result
6814 of module procedures in submodules wind up not being the 'real'
6815 dummy. Find this, if possible, in the namespace of the first
6819 fixup_unique_dummy (gfc_expr
*e
)
6821 gfc_symtree
*st
= NULL
;
6822 gfc_symbol
*s
= NULL
;
6824 if (e
->symtree
->n
.sym
->ns
->proc_name
6825 && e
->symtree
->n
.sym
->ns
->proc_name
->formal
)
6826 s
= e
->symtree
->n
.sym
->ns
->proc_name
->formal
->sym
;
6829 st
= gfc_find_symtree (s
->ns
->sym_root
, e
->symtree
->n
.sym
->name
);
6832 && st
->n
.sym
!= NULL
6833 && st
->n
.sym
->attr
.dummy
)
6837 /* Resolve an expression. That is, make sure that types of operands agree
6838 with their operators, intrinsic operators are converted to function calls
6839 for overloaded types and unresolved function references are resolved. */
6842 gfc_resolve_expr (gfc_expr
*e
)
6845 bool inquiry_save
, actual_arg_save
, first_actual_arg_save
;
6850 /* inquiry_argument only applies to variables. */
6851 inquiry_save
= inquiry_argument
;
6852 actual_arg_save
= actual_arg
;
6853 first_actual_arg_save
= first_actual_arg
;
6855 if (e
->expr_type
!= EXPR_VARIABLE
)
6857 inquiry_argument
= false;
6859 first_actual_arg
= false;
6861 else if (e
->symtree
!= NULL
6862 && *e
->symtree
->name
== '@'
6863 && e
->symtree
->n
.sym
->attr
.dummy
)
6865 /* Deal with submodule specification expressions that are not
6866 found to be referenced in module.c(read_cleanup). */
6867 fixup_unique_dummy (e
);
6870 switch (e
->expr_type
)
6873 t
= resolve_operator (e
);
6879 if (check_host_association (e
))
6880 t
= resolve_function (e
);
6882 t
= resolve_variable (e
);
6884 if (e
->ts
.type
== BT_CHARACTER
&& e
->ts
.u
.cl
== NULL
&& e
->ref
6885 && e
->ref
->type
!= REF_SUBSTRING
)
6886 gfc_resolve_substring_charlen (e
);
6891 t
= resolve_typebound_function (e
);
6894 case EXPR_SUBSTRING
:
6895 t
= resolve_ref (e
);
6904 t
= resolve_expr_ppc (e
);
6909 if (!resolve_ref (e
))
6912 t
= gfc_resolve_array_constructor (e
);
6913 /* Also try to expand a constructor. */
6916 expression_rank (e
);
6917 if (gfc_is_constant_expr (e
) || gfc_is_expandable_expr (e
))
6918 gfc_expand_constructor (e
, false);
6921 /* This provides the opportunity for the length of constructors with
6922 character valued function elements to propagate the string length
6923 to the expression. */
6924 if (t
&& e
->ts
.type
== BT_CHARACTER
)
6926 /* For efficiency, we call gfc_expand_constructor for BT_CHARACTER
6927 here rather then add a duplicate test for it above. */
6928 gfc_expand_constructor (e
, false);
6929 t
= gfc_resolve_character_array_constructor (e
);
6934 case EXPR_STRUCTURE
:
6935 t
= resolve_ref (e
);
6939 t
= resolve_structure_cons (e
, 0);
6943 t
= gfc_simplify_expr (e
, 0);
6947 gfc_internal_error ("gfc_resolve_expr(): Bad expression type");
6950 if (e
->ts
.type
== BT_CHARACTER
&& t
&& !e
->ts
.u
.cl
)
6953 inquiry_argument
= inquiry_save
;
6954 actual_arg
= actual_arg_save
;
6955 first_actual_arg
= first_actual_arg_save
;
6961 /* Resolve an expression from an iterator. They must be scalar and have
6962 INTEGER or (optionally) REAL type. */
6965 gfc_resolve_iterator_expr (gfc_expr
*expr
, bool real_ok
,
6966 const char *name_msgid
)
6968 if (!gfc_resolve_expr (expr
))
6971 if (expr
->rank
!= 0)
6973 gfc_error ("%s at %L must be a scalar", _(name_msgid
), &expr
->where
);
6977 if (expr
->ts
.type
!= BT_INTEGER
)
6979 if (expr
->ts
.type
== BT_REAL
)
6982 return gfc_notify_std (GFC_STD_F95_DEL
,
6983 "%s at %L must be integer",
6984 _(name_msgid
), &expr
->where
);
6987 gfc_error ("%s at %L must be INTEGER", _(name_msgid
),
6994 gfc_error ("%s at %L must be INTEGER", _(name_msgid
), &expr
->where
);
7002 /* Resolve the expressions in an iterator structure. If REAL_OK is
7003 false allow only INTEGER type iterators, otherwise allow REAL types.
7004 Set own_scope to true for ac-implied-do and data-implied-do as those
7005 have a separate scope such that, e.g., a INTENT(IN) doesn't apply. */
7008 gfc_resolve_iterator (gfc_iterator
*iter
, bool real_ok
, bool own_scope
)
7010 if (!gfc_resolve_iterator_expr (iter
->var
, real_ok
, "Loop variable"))
7013 if (!gfc_check_vardef_context (iter
->var
, false, false, own_scope
,
7014 _("iterator variable")))
7017 if (!gfc_resolve_iterator_expr (iter
->start
, real_ok
,
7018 "Start expression in DO loop"))
7021 if (!gfc_resolve_iterator_expr (iter
->end
, real_ok
,
7022 "End expression in DO loop"))
7025 if (!gfc_resolve_iterator_expr (iter
->step
, real_ok
,
7026 "Step expression in DO loop"))
7029 if (iter
->step
->expr_type
== EXPR_CONSTANT
)
7031 if ((iter
->step
->ts
.type
== BT_INTEGER
7032 && mpz_cmp_ui (iter
->step
->value
.integer
, 0) == 0)
7033 || (iter
->step
->ts
.type
== BT_REAL
7034 && mpfr_sgn (iter
->step
->value
.real
) == 0))
7036 gfc_error ("Step expression in DO loop at %L cannot be zero",
7037 &iter
->step
->where
);
7042 /* Convert start, end, and step to the same type as var. */
7043 if (iter
->start
->ts
.kind
!= iter
->var
->ts
.kind
7044 || iter
->start
->ts
.type
!= iter
->var
->ts
.type
)
7045 gfc_convert_type (iter
->start
, &iter
->var
->ts
, 1);
7047 if (iter
->end
->ts
.kind
!= iter
->var
->ts
.kind
7048 || iter
->end
->ts
.type
!= iter
->var
->ts
.type
)
7049 gfc_convert_type (iter
->end
, &iter
->var
->ts
, 1);
7051 if (iter
->step
->ts
.kind
!= iter
->var
->ts
.kind
7052 || iter
->step
->ts
.type
!= iter
->var
->ts
.type
)
7053 gfc_convert_type (iter
->step
, &iter
->var
->ts
, 1);
7055 if (iter
->start
->expr_type
== EXPR_CONSTANT
7056 && iter
->end
->expr_type
== EXPR_CONSTANT
7057 && iter
->step
->expr_type
== EXPR_CONSTANT
)
7060 if (iter
->start
->ts
.type
== BT_INTEGER
)
7062 sgn
= mpz_cmp_ui (iter
->step
->value
.integer
, 0);
7063 cmp
= mpz_cmp (iter
->end
->value
.integer
, iter
->start
->value
.integer
);
7067 sgn
= mpfr_sgn (iter
->step
->value
.real
);
7068 cmp
= mpfr_cmp (iter
->end
->value
.real
, iter
->start
->value
.real
);
7070 if (warn_zerotrip
&& ((sgn
> 0 && cmp
< 0) || (sgn
< 0 && cmp
> 0)))
7071 gfc_warning (OPT_Wzerotrip
,
7072 "DO loop at %L will be executed zero times",
7073 &iter
->step
->where
);
7076 if (iter
->end
->expr_type
== EXPR_CONSTANT
7077 && iter
->end
->ts
.type
== BT_INTEGER
7078 && iter
->step
->expr_type
== EXPR_CONSTANT
7079 && iter
->step
->ts
.type
== BT_INTEGER
7080 && (mpz_cmp_si (iter
->step
->value
.integer
, -1L) == 0
7081 || mpz_cmp_si (iter
->step
->value
.integer
, 1L) == 0))
7083 bool is_step_positive
= mpz_cmp_ui (iter
->step
->value
.integer
, 1) == 0;
7084 int k
= gfc_validate_kind (BT_INTEGER
, iter
->end
->ts
.kind
, false);
7086 if (is_step_positive
7087 && mpz_cmp (iter
->end
->value
.integer
, gfc_integer_kinds
[k
].huge
) == 0)
7088 gfc_warning (OPT_Wundefined_do_loop
,
7089 "DO loop at %L is undefined as it overflows",
7090 &iter
->step
->where
);
7091 else if (!is_step_positive
7092 && mpz_cmp (iter
->end
->value
.integer
,
7093 gfc_integer_kinds
[k
].min_int
) == 0)
7094 gfc_warning (OPT_Wundefined_do_loop
,
7095 "DO loop at %L is undefined as it underflows",
7096 &iter
->step
->where
);
7103 /* Traversal function for find_forall_index. f == 2 signals that
7104 that variable itself is not to be checked - only the references. */
7107 forall_index (gfc_expr
*expr
, gfc_symbol
*sym
, int *f
)
7109 if (expr
->expr_type
!= EXPR_VARIABLE
)
7112 /* A scalar assignment */
7113 if (!expr
->ref
|| *f
== 1)
7115 if (expr
->symtree
->n
.sym
== sym
)
7127 /* Check whether the FORALL index appears in the expression or not.
7128 Returns true if SYM is found in EXPR. */
7131 find_forall_index (gfc_expr
*expr
, gfc_symbol
*sym
, int f
)
7133 if (gfc_traverse_expr (expr
, sym
, forall_index
, f
))
7140 /* Resolve a list of FORALL iterators. The FORALL index-name is constrained
7141 to be a scalar INTEGER variable. The subscripts and stride are scalar
7142 INTEGERs, and if stride is a constant it must be nonzero.
7143 Furthermore "A subscript or stride in a forall-triplet-spec shall
7144 not contain a reference to any index-name in the
7145 forall-triplet-spec-list in which it appears." (7.5.4.1) */
7148 resolve_forall_iterators (gfc_forall_iterator
*it
)
7150 gfc_forall_iterator
*iter
, *iter2
;
7152 for (iter
= it
; iter
; iter
= iter
->next
)
7154 if (gfc_resolve_expr (iter
->var
)
7155 && (iter
->var
->ts
.type
!= BT_INTEGER
|| iter
->var
->rank
!= 0))
7156 gfc_error ("FORALL index-name at %L must be a scalar INTEGER",
7159 if (gfc_resolve_expr (iter
->start
)
7160 && (iter
->start
->ts
.type
!= BT_INTEGER
|| iter
->start
->rank
!= 0))
7161 gfc_error ("FORALL start expression at %L must be a scalar INTEGER",
7162 &iter
->start
->where
);
7163 if (iter
->var
->ts
.kind
!= iter
->start
->ts
.kind
)
7164 gfc_convert_type (iter
->start
, &iter
->var
->ts
, 1);
7166 if (gfc_resolve_expr (iter
->end
)
7167 && (iter
->end
->ts
.type
!= BT_INTEGER
|| iter
->end
->rank
!= 0))
7168 gfc_error ("FORALL end expression at %L must be a scalar INTEGER",
7170 if (iter
->var
->ts
.kind
!= iter
->end
->ts
.kind
)
7171 gfc_convert_type (iter
->end
, &iter
->var
->ts
, 1);
7173 if (gfc_resolve_expr (iter
->stride
))
7175 if (iter
->stride
->ts
.type
!= BT_INTEGER
|| iter
->stride
->rank
!= 0)
7176 gfc_error ("FORALL stride expression at %L must be a scalar %s",
7177 &iter
->stride
->where
, "INTEGER");
7179 if (iter
->stride
->expr_type
== EXPR_CONSTANT
7180 && mpz_cmp_ui (iter
->stride
->value
.integer
, 0) == 0)
7181 gfc_error ("FORALL stride expression at %L cannot be zero",
7182 &iter
->stride
->where
);
7184 if (iter
->var
->ts
.kind
!= iter
->stride
->ts
.kind
)
7185 gfc_convert_type (iter
->stride
, &iter
->var
->ts
, 1);
7188 for (iter
= it
; iter
; iter
= iter
->next
)
7189 for (iter2
= iter
; iter2
; iter2
= iter2
->next
)
7191 if (find_forall_index (iter2
->start
, iter
->var
->symtree
->n
.sym
, 0)
7192 || find_forall_index (iter2
->end
, iter
->var
->symtree
->n
.sym
, 0)
7193 || find_forall_index (iter2
->stride
, iter
->var
->symtree
->n
.sym
, 0))
7194 gfc_error ("FORALL index %qs may not appear in triplet "
7195 "specification at %L", iter
->var
->symtree
->name
,
7196 &iter2
->start
->where
);
7201 /* Given a pointer to a symbol that is a derived type, see if it's
7202 inaccessible, i.e. if it's defined in another module and the components are
7203 PRIVATE. The search is recursive if necessary. Returns zero if no
7204 inaccessible components are found, nonzero otherwise. */
7207 derived_inaccessible (gfc_symbol
*sym
)
7211 if (sym
->attr
.use_assoc
&& sym
->attr
.private_comp
)
7214 for (c
= sym
->components
; c
; c
= c
->next
)
7216 /* Prevent an infinite loop through this function. */
7217 if (c
->ts
.type
== BT_DERIVED
&& c
->attr
.pointer
7218 && sym
== c
->ts
.u
.derived
)
7221 if (c
->ts
.type
== BT_DERIVED
&& derived_inaccessible (c
->ts
.u
.derived
))
7229 /* Resolve the argument of a deallocate expression. The expression must be
7230 a pointer or a full array. */
7233 resolve_deallocate_expr (gfc_expr
*e
)
7235 symbol_attribute attr
;
7236 int allocatable
, pointer
;
7242 if (!gfc_resolve_expr (e
))
7245 if (e
->expr_type
!= EXPR_VARIABLE
)
7248 sym
= e
->symtree
->n
.sym
;
7249 unlimited
= UNLIMITED_POLY(sym
);
7251 if (sym
->ts
.type
== BT_CLASS
)
7253 allocatable
= CLASS_DATA (sym
)->attr
.allocatable
;
7254 pointer
= CLASS_DATA (sym
)->attr
.class_pointer
;
7258 allocatable
= sym
->attr
.allocatable
;
7259 pointer
= sym
->attr
.pointer
;
7261 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
7266 if (ref
->u
.ar
.type
!= AR_FULL
7267 && !(ref
->u
.ar
.type
== AR_ELEMENT
&& ref
->u
.ar
.as
->rank
== 0
7268 && ref
->u
.ar
.codimen
&& gfc_ref_this_image (ref
)))
7273 c
= ref
->u
.c
.component
;
7274 if (c
->ts
.type
== BT_CLASS
)
7276 allocatable
= CLASS_DATA (c
)->attr
.allocatable
;
7277 pointer
= CLASS_DATA (c
)->attr
.class_pointer
;
7281 allocatable
= c
->attr
.allocatable
;
7282 pointer
= c
->attr
.pointer
;
7293 attr
= gfc_expr_attr (e
);
7295 if (allocatable
== 0 && attr
.pointer
== 0 && !unlimited
)
7298 gfc_error ("Allocate-object at %L must be ALLOCATABLE or a POINTER",
7304 if (gfc_is_coindexed (e
))
7306 gfc_error ("Coindexed allocatable object at %L", &e
->where
);
7311 && !gfc_check_vardef_context (e
, true, true, false,
7312 _("DEALLOCATE object")))
7314 if (!gfc_check_vardef_context (e
, false, true, false,
7315 _("DEALLOCATE object")))
7322 /* Returns true if the expression e contains a reference to the symbol sym. */
7324 sym_in_expr (gfc_expr
*e
, gfc_symbol
*sym
, int *f ATTRIBUTE_UNUSED
)
7326 if (e
->expr_type
== EXPR_VARIABLE
&& e
->symtree
->n
.sym
== sym
)
7333 gfc_find_sym_in_expr (gfc_symbol
*sym
, gfc_expr
*e
)
7335 return gfc_traverse_expr (e
, sym
, sym_in_expr
, 0);
7339 /* Given the expression node e for an allocatable/pointer of derived type to be
7340 allocated, get the expression node to be initialized afterwards (needed for
7341 derived types with default initializers, and derived types with allocatable
7342 components that need nullification.) */
7345 gfc_expr_to_initialize (gfc_expr
*e
)
7351 result
= gfc_copy_expr (e
);
7353 /* Change the last array reference from AR_ELEMENT to AR_FULL. */
7354 for (ref
= result
->ref
; ref
; ref
= ref
->next
)
7355 if (ref
->type
== REF_ARRAY
&& ref
->next
== NULL
)
7357 ref
->u
.ar
.type
= AR_FULL
;
7359 for (i
= 0; i
< ref
->u
.ar
.dimen
; i
++)
7360 ref
->u
.ar
.start
[i
] = ref
->u
.ar
.end
[i
] = ref
->u
.ar
.stride
[i
] = NULL
;
7365 gfc_free_shape (&result
->shape
, result
->rank
);
7367 /* Recalculate rank, shape, etc. */
7368 gfc_resolve_expr (result
);
7373 /* If the last ref of an expression is an array ref, return a copy of the
7374 expression with that one removed. Otherwise, a copy of the original
7375 expression. This is used for allocate-expressions and pointer assignment
7376 LHS, where there may be an array specification that needs to be stripped
7377 off when using gfc_check_vardef_context. */
7380 remove_last_array_ref (gfc_expr
* e
)
7385 e2
= gfc_copy_expr (e
);
7386 for (r
= &e2
->ref
; *r
; r
= &(*r
)->next
)
7387 if ((*r
)->type
== REF_ARRAY
&& !(*r
)->next
)
7389 gfc_free_ref_list (*r
);
7398 /* Used in resolve_allocate_expr to check that a allocation-object and
7399 a source-expr are conformable. This does not catch all possible
7400 cases; in particular a runtime checking is needed. */
7403 conformable_arrays (gfc_expr
*e1
, gfc_expr
*e2
)
7406 for (tail
= e2
->ref
; tail
&& tail
->next
; tail
= tail
->next
);
7408 /* First compare rank. */
7409 if ((tail
&& e1
->rank
!= tail
->u
.ar
.as
->rank
)
7410 || (!tail
&& e1
->rank
!= e2
->rank
))
7412 gfc_error ("Source-expr at %L must be scalar or have the "
7413 "same rank as the allocate-object at %L",
7414 &e1
->where
, &e2
->where
);
7425 for (i
= 0; i
< e1
->rank
; i
++)
7427 if (tail
->u
.ar
.start
[i
] == NULL
)
7430 if (tail
->u
.ar
.end
[i
])
7432 mpz_set (s
, tail
->u
.ar
.end
[i
]->value
.integer
);
7433 mpz_sub (s
, s
, tail
->u
.ar
.start
[i
]->value
.integer
);
7434 mpz_add_ui (s
, s
, 1);
7438 mpz_set (s
, tail
->u
.ar
.start
[i
]->value
.integer
);
7441 if (mpz_cmp (e1
->shape
[i
], s
) != 0)
7443 gfc_error ("Source-expr at %L and allocate-object at %L must "
7444 "have the same shape", &e1
->where
, &e2
->where
);
7457 /* Resolve the expression in an ALLOCATE statement, doing the additional
7458 checks to see whether the expression is OK or not. The expression must
7459 have a trailing array reference that gives the size of the array. */
7462 resolve_allocate_expr (gfc_expr
*e
, gfc_code
*code
, bool *array_alloc_wo_spec
)
7464 int i
, pointer
, allocatable
, dimension
, is_abstract
;
7468 symbol_attribute attr
;
7469 gfc_ref
*ref
, *ref2
;
7472 gfc_symbol
*sym
= NULL
;
7477 /* Mark the utmost array component as being in allocate to allow DIMEN_STAR
7478 checking of coarrays. */
7479 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
7480 if (ref
->next
== NULL
)
7483 if (ref
&& ref
->type
== REF_ARRAY
)
7484 ref
->u
.ar
.in_allocate
= true;
7486 if (!gfc_resolve_expr (e
))
7489 /* Make sure the expression is allocatable or a pointer. If it is
7490 pointer, the next-to-last reference must be a pointer. */
7494 sym
= e
->symtree
->n
.sym
;
7496 /* Check whether ultimate component is abstract and CLASS. */
7499 /* Is the allocate-object unlimited polymorphic? */
7500 unlimited
= UNLIMITED_POLY(e
);
7502 if (e
->expr_type
!= EXPR_VARIABLE
)
7505 attr
= gfc_expr_attr (e
);
7506 pointer
= attr
.pointer
;
7507 dimension
= attr
.dimension
;
7508 codimension
= attr
.codimension
;
7512 if (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
))
7514 allocatable
= CLASS_DATA (sym
)->attr
.allocatable
;
7515 pointer
= CLASS_DATA (sym
)->attr
.class_pointer
;
7516 dimension
= CLASS_DATA (sym
)->attr
.dimension
;
7517 codimension
= CLASS_DATA (sym
)->attr
.codimension
;
7518 is_abstract
= CLASS_DATA (sym
)->attr
.abstract
;
7522 allocatable
= sym
->attr
.allocatable
;
7523 pointer
= sym
->attr
.pointer
;
7524 dimension
= sym
->attr
.dimension
;
7525 codimension
= sym
->attr
.codimension
;
7530 for (ref
= e
->ref
; ref
; ref2
= ref
, ref
= ref
->next
)
7535 if (ref
->u
.ar
.codimen
> 0)
7538 for (n
= ref
->u
.ar
.dimen
;
7539 n
< ref
->u
.ar
.dimen
+ ref
->u
.ar
.codimen
; n
++)
7540 if (ref
->u
.ar
.dimen_type
[n
] != DIMEN_THIS_IMAGE
)
7547 if (ref
->next
!= NULL
)
7555 gfc_error ("Coindexed allocatable object at %L",
7560 c
= ref
->u
.c
.component
;
7561 if (c
->ts
.type
== BT_CLASS
)
7563 allocatable
= CLASS_DATA (c
)->attr
.allocatable
;
7564 pointer
= CLASS_DATA (c
)->attr
.class_pointer
;
7565 dimension
= CLASS_DATA (c
)->attr
.dimension
;
7566 codimension
= CLASS_DATA (c
)->attr
.codimension
;
7567 is_abstract
= CLASS_DATA (c
)->attr
.abstract
;
7571 allocatable
= c
->attr
.allocatable
;
7572 pointer
= c
->attr
.pointer
;
7573 dimension
= c
->attr
.dimension
;
7574 codimension
= c
->attr
.codimension
;
7575 is_abstract
= c
->attr
.abstract
;
7588 /* Check for F08:C628. */
7589 if (allocatable
== 0 && pointer
== 0 && !unlimited
)
7591 gfc_error ("Allocate-object at %L must be ALLOCATABLE or a POINTER",
7596 /* Some checks for the SOURCE tag. */
7599 /* Check F03:C631. */
7600 if (!gfc_type_compatible (&e
->ts
, &code
->expr3
->ts
))
7602 gfc_error ("Type of entity at %L is type incompatible with "
7603 "source-expr at %L", &e
->where
, &code
->expr3
->where
);
7607 /* Check F03:C632 and restriction following Note 6.18. */
7608 if (code
->expr3
->rank
> 0 && !conformable_arrays (code
->expr3
, e
))
7611 /* Check F03:C633. */
7612 if (code
->expr3
->ts
.kind
!= e
->ts
.kind
&& !unlimited
)
7614 gfc_error ("The allocate-object at %L and the source-expr at %L "
7615 "shall have the same kind type parameter",
7616 &e
->where
, &code
->expr3
->where
);
7620 /* Check F2008, C642. */
7621 if (code
->expr3
->ts
.type
== BT_DERIVED
7622 && ((codimension
&& gfc_expr_attr (code
->expr3
).lock_comp
)
7623 || (code
->expr3
->ts
.u
.derived
->from_intmod
7624 == INTMOD_ISO_FORTRAN_ENV
7625 && code
->expr3
->ts
.u
.derived
->intmod_sym_id
7626 == ISOFORTRAN_LOCK_TYPE
)))
7628 gfc_error ("The source-expr at %L shall neither be of type "
7629 "LOCK_TYPE nor have a LOCK_TYPE component if "
7630 "allocate-object at %L is a coarray",
7631 &code
->expr3
->where
, &e
->where
);
7635 /* Check TS18508, C702/C703. */
7636 if (code
->expr3
->ts
.type
== BT_DERIVED
7637 && ((codimension
&& gfc_expr_attr (code
->expr3
).event_comp
)
7638 || (code
->expr3
->ts
.u
.derived
->from_intmod
7639 == INTMOD_ISO_FORTRAN_ENV
7640 && code
->expr3
->ts
.u
.derived
->intmod_sym_id
7641 == ISOFORTRAN_EVENT_TYPE
)))
7643 gfc_error ("The source-expr at %L shall neither be of type "
7644 "EVENT_TYPE nor have a EVENT_TYPE component if "
7645 "allocate-object at %L is a coarray",
7646 &code
->expr3
->where
, &e
->where
);
7651 /* Check F08:C629. */
7652 if (is_abstract
&& code
->ext
.alloc
.ts
.type
== BT_UNKNOWN
7655 gcc_assert (e
->ts
.type
== BT_CLASS
);
7656 gfc_error ("Allocating %s of ABSTRACT base type at %L requires a "
7657 "type-spec or source-expr", sym
->name
, &e
->where
);
7661 /* Check F08:C632. */
7662 if (code
->ext
.alloc
.ts
.type
== BT_CHARACTER
&& !e
->ts
.deferred
7663 && !UNLIMITED_POLY (e
))
7667 if (!e
->ts
.u
.cl
->length
)
7670 cmp
= gfc_dep_compare_expr (e
->ts
.u
.cl
->length
,
7671 code
->ext
.alloc
.ts
.u
.cl
->length
);
7672 if (cmp
== 1 || cmp
== -1 || cmp
== -3)
7674 gfc_error ("Allocating %s at %L with type-spec requires the same "
7675 "character-length parameter as in the declaration",
7676 sym
->name
, &e
->where
);
7681 /* In the variable definition context checks, gfc_expr_attr is used
7682 on the expression. This is fooled by the array specification
7683 present in e, thus we have to eliminate that one temporarily. */
7684 e2
= remove_last_array_ref (e
);
7687 t
= gfc_check_vardef_context (e2
, true, true, false,
7688 _("ALLOCATE object"));
7690 t
= gfc_check_vardef_context (e2
, false, true, false,
7691 _("ALLOCATE object"));
7696 if (e
->ts
.type
== BT_CLASS
&& CLASS_DATA (e
)->attr
.dimension
7697 && !code
->expr3
&& code
->ext
.alloc
.ts
.type
== BT_DERIVED
)
7699 /* For class arrays, the initialization with SOURCE is done
7700 using _copy and trans_call. It is convenient to exploit that
7701 when the allocated type is different from the declared type but
7702 no SOURCE exists by setting expr3. */
7703 code
->expr3
= gfc_default_initializer (&code
->ext
.alloc
.ts
);
7705 else if (flag_coarray
!= GFC_FCOARRAY_LIB
&& e
->ts
.type
== BT_DERIVED
7706 && e
->ts
.u
.derived
->from_intmod
== INTMOD_ISO_FORTRAN_ENV
7707 && e
->ts
.u
.derived
->intmod_sym_id
== ISOFORTRAN_EVENT_TYPE
)
7709 /* We have to zero initialize the integer variable. */
7710 code
->expr3
= gfc_get_int_expr (gfc_default_integer_kind
, &e
->where
, 0);
7713 if (e
->ts
.type
== BT_CLASS
&& !unlimited
&& !UNLIMITED_POLY (code
->expr3
))
7715 /* Make sure the vtab symbol is present when
7716 the module variables are generated. */
7717 gfc_typespec ts
= e
->ts
;
7719 ts
= code
->expr3
->ts
;
7720 else if (code
->ext
.alloc
.ts
.type
== BT_DERIVED
)
7721 ts
= code
->ext
.alloc
.ts
;
7723 /* Finding the vtab also publishes the type's symbol. Therefore this
7724 statement is necessary. */
7725 gfc_find_derived_vtab (ts
.u
.derived
);
7727 else if (unlimited
&& !UNLIMITED_POLY (code
->expr3
))
7729 /* Again, make sure the vtab symbol is present when
7730 the module variables are generated. */
7731 gfc_typespec
*ts
= NULL
;
7733 ts
= &code
->expr3
->ts
;
7735 ts
= &code
->ext
.alloc
.ts
;
7739 /* Finding the vtab also publishes the type's symbol. Therefore this
7740 statement is necessary. */
7744 if (dimension
== 0 && codimension
== 0)
7747 /* Make sure the last reference node is an array specification. */
7749 if (!ref2
|| ref2
->type
!= REF_ARRAY
|| ref2
->u
.ar
.type
== AR_FULL
7750 || (dimension
&& ref2
->u
.ar
.dimen
== 0))
7755 if (!gfc_notify_std (GFC_STD_F2008
, "Array specification required "
7756 "in ALLOCATE statement at %L", &e
->where
))
7758 if (code
->expr3
->rank
!= 0)
7759 *array_alloc_wo_spec
= true;
7762 gfc_error ("Array specification or array-valued SOURCE= "
7763 "expression required in ALLOCATE statement at %L",
7770 gfc_error ("Array specification required in ALLOCATE statement "
7771 "at %L", &e
->where
);
7776 /* Make sure that the array section reference makes sense in the
7777 context of an ALLOCATE specification. */
7782 for (i
= ar
->dimen
; i
< ar
->dimen
+ ar
->codimen
; i
++)
7784 switch (ar
->dimen_type
[i
])
7786 case DIMEN_THIS_IMAGE
:
7787 gfc_error ("Coarray specification required in ALLOCATE statement "
7788 "at %L", &e
->where
);
7792 if (ar
->start
[i
] == 0 || ar
->end
[i
] == 0)
7794 /* If ar->stride[i] is NULL, we issued a previous error. */
7795 if (ar
->stride
[i
] == NULL
)
7796 gfc_error ("Bad array specification in ALLOCATE statement "
7797 "at %L", &e
->where
);
7800 else if (gfc_dep_compare_expr (ar
->start
[i
], ar
->end
[i
]) == 1)
7802 gfc_error ("Upper cobound is less than lower cobound at %L",
7803 &ar
->start
[i
]->where
);
7809 if (ar
->start
[i
]->expr_type
== EXPR_CONSTANT
)
7811 gcc_assert (ar
->start
[i
]->ts
.type
== BT_INTEGER
);
7812 if (mpz_cmp_si (ar
->start
[i
]->value
.integer
, 1) < 0)
7814 gfc_error ("Upper cobound is less than lower cobound "
7815 "of 1 at %L", &ar
->start
[i
]->where
);
7825 gfc_error ("Bad array specification in ALLOCATE statement at %L",
7831 for (i
= 0; i
< ar
->dimen
; i
++)
7833 if (ar
->type
== AR_ELEMENT
|| ar
->type
== AR_FULL
)
7836 switch (ar
->dimen_type
[i
])
7842 if (ar
->start
[i
] != NULL
7843 && ar
->end
[i
] != NULL
7844 && ar
->stride
[i
] == NULL
)
7852 case DIMEN_THIS_IMAGE
:
7853 gfc_error ("Bad array specification in ALLOCATE statement at %L",
7859 for (a
= code
->ext
.alloc
.list
; a
; a
= a
->next
)
7861 sym
= a
->expr
->symtree
->n
.sym
;
7863 /* TODO - check derived type components. */
7864 if (gfc_bt_struct (sym
->ts
.type
) || sym
->ts
.type
== BT_CLASS
)
7867 if ((ar
->start
[i
] != NULL
7868 && gfc_find_sym_in_expr (sym
, ar
->start
[i
]))
7869 || (ar
->end
[i
] != NULL
7870 && gfc_find_sym_in_expr (sym
, ar
->end
[i
])))
7872 gfc_error ("%qs must not appear in the array specification at "
7873 "%L in the same ALLOCATE statement where it is "
7874 "itself allocated", sym
->name
, &ar
->where
);
7880 for (i
= ar
->dimen
; i
< ar
->codimen
+ ar
->dimen
; i
++)
7882 if (ar
->dimen_type
[i
] == DIMEN_ELEMENT
7883 || ar
->dimen_type
[i
] == DIMEN_RANGE
)
7885 if (i
== (ar
->dimen
+ ar
->codimen
- 1))
7887 gfc_error ("Expected '*' in coindex specification in ALLOCATE "
7888 "statement at %L", &e
->where
);
7894 if (ar
->dimen_type
[i
] == DIMEN_STAR
&& i
== (ar
->dimen
+ ar
->codimen
- 1)
7895 && ar
->stride
[i
] == NULL
)
7898 gfc_error ("Bad coarray specification in ALLOCATE statement at %L",
7912 resolve_allocate_deallocate (gfc_code
*code
, const char *fcn
)
7914 gfc_expr
*stat
, *errmsg
, *pe
, *qe
;
7915 gfc_alloc
*a
, *p
, *q
;
7918 errmsg
= code
->expr2
;
7920 /* Check the stat variable. */
7923 gfc_check_vardef_context (stat
, false, false, false,
7924 _("STAT variable"));
7926 if ((stat
->ts
.type
!= BT_INTEGER
7927 && !(stat
->ref
&& (stat
->ref
->type
== REF_ARRAY
7928 || stat
->ref
->type
== REF_COMPONENT
)))
7930 gfc_error ("Stat-variable at %L must be a scalar INTEGER "
7931 "variable", &stat
->where
);
7933 for (p
= code
->ext
.alloc
.list
; p
; p
= p
->next
)
7934 if (p
->expr
->symtree
->n
.sym
->name
== stat
->symtree
->n
.sym
->name
)
7936 gfc_ref
*ref1
, *ref2
;
7939 for (ref1
= p
->expr
->ref
, ref2
= stat
->ref
; ref1
&& ref2
;
7940 ref1
= ref1
->next
, ref2
= ref2
->next
)
7942 if (ref1
->type
!= REF_COMPONENT
|| ref2
->type
!= REF_COMPONENT
)
7944 if (ref1
->u
.c
.component
->name
!= ref2
->u
.c
.component
->name
)
7953 gfc_error ("Stat-variable at %L shall not be %sd within "
7954 "the same %s statement", &stat
->where
, fcn
, fcn
);
7960 /* Check the errmsg variable. */
7964 gfc_warning (0, "ERRMSG at %L is useless without a STAT tag",
7967 gfc_check_vardef_context (errmsg
, false, false, false,
7968 _("ERRMSG variable"));
7970 /* F18:R928 alloc-opt is ERRMSG = errmsg-variable
7971 F18:R930 errmsg-variable is scalar-default-char-variable
7972 F18:R906 default-char-variable is variable
7973 F18:C906 default-char-variable shall be default character. */
7974 if ((errmsg
->ts
.type
!= BT_CHARACTER
7976 && (errmsg
->ref
->type
== REF_ARRAY
7977 || errmsg
->ref
->type
== REF_COMPONENT
)))
7979 || errmsg
->ts
.kind
!= gfc_default_character_kind
)
7980 gfc_error ("ERRMSG variable at %L shall be a scalar default CHARACTER "
7981 "variable", &errmsg
->where
);
7983 for (p
= code
->ext
.alloc
.list
; p
; p
= p
->next
)
7984 if (p
->expr
->symtree
->n
.sym
->name
== errmsg
->symtree
->n
.sym
->name
)
7986 gfc_ref
*ref1
, *ref2
;
7989 for (ref1
= p
->expr
->ref
, ref2
= errmsg
->ref
; ref1
&& ref2
;
7990 ref1
= ref1
->next
, ref2
= ref2
->next
)
7992 if (ref1
->type
!= REF_COMPONENT
|| ref2
->type
!= REF_COMPONENT
)
7994 if (ref1
->u
.c
.component
->name
!= ref2
->u
.c
.component
->name
)
8003 gfc_error ("Errmsg-variable at %L shall not be %sd within "
8004 "the same %s statement", &errmsg
->where
, fcn
, fcn
);
8010 /* Check that an allocate-object appears only once in the statement. */
8012 for (p
= code
->ext
.alloc
.list
; p
; p
= p
->next
)
8015 for (q
= p
->next
; q
; q
= q
->next
)
8018 if (pe
->symtree
->n
.sym
->name
== qe
->symtree
->n
.sym
->name
)
8020 /* This is a potential collision. */
8021 gfc_ref
*pr
= pe
->ref
;
8022 gfc_ref
*qr
= qe
->ref
;
8024 /* Follow the references until
8025 a) They start to differ, in which case there is no error;
8026 you can deallocate a%b and a%c in a single statement
8027 b) Both of them stop, which is an error
8028 c) One of them stops, which is also an error. */
8031 if (pr
== NULL
&& qr
== NULL
)
8033 gfc_error ("Allocate-object at %L also appears at %L",
8034 &pe
->where
, &qe
->where
);
8037 else if (pr
!= NULL
&& qr
== NULL
)
8039 gfc_error ("Allocate-object at %L is subobject of"
8040 " object at %L", &pe
->where
, &qe
->where
);
8043 else if (pr
== NULL
&& qr
!= NULL
)
8045 gfc_error ("Allocate-object at %L is subobject of"
8046 " object at %L", &qe
->where
, &pe
->where
);
8049 /* Here, pr != NULL && qr != NULL */
8050 gcc_assert(pr
->type
== qr
->type
);
8051 if (pr
->type
== REF_ARRAY
)
8053 /* Handle cases like allocate(v(3)%x(3), v(2)%x(3)),
8055 gcc_assert (qr
->type
== REF_ARRAY
);
8057 if (pr
->next
&& qr
->next
)
8060 gfc_array_ref
*par
= &(pr
->u
.ar
);
8061 gfc_array_ref
*qar
= &(qr
->u
.ar
);
8063 for (i
=0; i
<par
->dimen
; i
++)
8065 if ((par
->start
[i
] != NULL
8066 || qar
->start
[i
] != NULL
)
8067 && gfc_dep_compare_expr (par
->start
[i
],
8068 qar
->start
[i
]) != 0)
8075 if (pr
->u
.c
.component
->name
!= qr
->u
.c
.component
->name
)
8088 if (strcmp (fcn
, "ALLOCATE") == 0)
8090 bool arr_alloc_wo_spec
= false;
8092 /* Resolving the expr3 in the loop over all objects to allocate would
8093 execute loop invariant code for each loop item. Therefore do it just
8095 if (code
->expr3
&& code
->expr3
->mold
8096 && code
->expr3
->ts
.type
== BT_DERIVED
)
8098 /* Default initialization via MOLD (non-polymorphic). */
8099 gfc_expr
*rhs
= gfc_default_initializer (&code
->expr3
->ts
);
8102 gfc_resolve_expr (rhs
);
8103 gfc_free_expr (code
->expr3
);
8107 for (a
= code
->ext
.alloc
.list
; a
; a
= a
->next
)
8108 resolve_allocate_expr (a
->expr
, code
, &arr_alloc_wo_spec
);
8110 if (arr_alloc_wo_spec
&& code
->expr3
)
8112 /* Mark the allocate to have to take the array specification
8114 code
->ext
.alloc
.arr_spec_from_expr3
= 1;
8119 for (a
= code
->ext
.alloc
.list
; a
; a
= a
->next
)
8120 resolve_deallocate_expr (a
->expr
);
8125 /************ SELECT CASE resolution subroutines ************/
8127 /* Callback function for our mergesort variant. Determines interval
8128 overlaps for CASEs. Return <0 if op1 < op2, 0 for overlap, >0 for
8129 op1 > op2. Assumes we're not dealing with the default case.
8130 We have op1 = (:L), (K:L) or (K:) and op2 = (:N), (M:N) or (M:).
8131 There are nine situations to check. */
8134 compare_cases (const gfc_case
*op1
, const gfc_case
*op2
)
8138 if (op1
->low
== NULL
) /* op1 = (:L) */
8140 /* op2 = (:N), so overlap. */
8142 /* op2 = (M:) or (M:N), L < M */
8143 if (op2
->low
!= NULL
8144 && gfc_compare_expr (op1
->high
, op2
->low
, INTRINSIC_LT
) < 0)
8147 else if (op1
->high
== NULL
) /* op1 = (K:) */
8149 /* op2 = (M:), so overlap. */
8151 /* op2 = (:N) or (M:N), K > N */
8152 if (op2
->high
!= NULL
8153 && gfc_compare_expr (op1
->low
, op2
->high
, INTRINSIC_GT
) > 0)
8156 else /* op1 = (K:L) */
8158 if (op2
->low
== NULL
) /* op2 = (:N), K > N */
8159 retval
= (gfc_compare_expr (op1
->low
, op2
->high
, INTRINSIC_GT
) > 0)
8161 else if (op2
->high
== NULL
) /* op2 = (M:), L < M */
8162 retval
= (gfc_compare_expr (op1
->high
, op2
->low
, INTRINSIC_LT
) < 0)
8164 else /* op2 = (M:N) */
8168 if (gfc_compare_expr (op1
->high
, op2
->low
, INTRINSIC_LT
) < 0)
8171 else if (gfc_compare_expr (op1
->low
, op2
->high
, INTRINSIC_GT
) > 0)
8180 /* Merge-sort a double linked case list, detecting overlap in the
8181 process. LIST is the head of the double linked case list before it
8182 is sorted. Returns the head of the sorted list if we don't see any
8183 overlap, or NULL otherwise. */
8186 check_case_overlap (gfc_case
*list
)
8188 gfc_case
*p
, *q
, *e
, *tail
;
8189 int insize
, nmerges
, psize
, qsize
, cmp
, overlap_seen
;
8191 /* If the passed list was empty, return immediately. */
8198 /* Loop unconditionally. The only exit from this loop is a return
8199 statement, when we've finished sorting the case list. */
8206 /* Count the number of merges we do in this pass. */
8209 /* Loop while there exists a merge to be done. */
8214 /* Count this merge. */
8217 /* Cut the list in two pieces by stepping INSIZE places
8218 forward in the list, starting from P. */
8221 for (i
= 0; i
< insize
; i
++)
8230 /* Now we have two lists. Merge them! */
8231 while (psize
> 0 || (qsize
> 0 && q
!= NULL
))
8233 /* See from which the next case to merge comes from. */
8236 /* P is empty so the next case must come from Q. */
8241 else if (qsize
== 0 || q
== NULL
)
8250 cmp
= compare_cases (p
, q
);
8253 /* The whole case range for P is less than the
8261 /* The whole case range for Q is greater than
8262 the case range for P. */
8269 /* The cases overlap, or they are the same
8270 element in the list. Either way, we must
8271 issue an error and get the next case from P. */
8272 /* FIXME: Sort P and Q by line number. */
8273 gfc_error ("CASE label at %L overlaps with CASE "
8274 "label at %L", &p
->where
, &q
->where
);
8282 /* Add the next element to the merged list. */
8291 /* P has now stepped INSIZE places along, and so has Q. So
8292 they're the same. */
8297 /* If we have done only one merge or none at all, we've
8298 finished sorting the cases. */
8307 /* Otherwise repeat, merging lists twice the size. */
8313 /* Check to see if an expression is suitable for use in a CASE statement.
8314 Makes sure that all case expressions are scalar constants of the same
8315 type. Return false if anything is wrong. */
8318 validate_case_label_expr (gfc_expr
*e
, gfc_expr
*case_expr
)
8320 if (e
== NULL
) return true;
8322 if (e
->ts
.type
!= case_expr
->ts
.type
)
8324 gfc_error ("Expression in CASE statement at %L must be of type %s",
8325 &e
->where
, gfc_basic_typename (case_expr
->ts
.type
));
8329 /* C805 (R808) For a given case-construct, each case-value shall be of
8330 the same type as case-expr. For character type, length differences
8331 are allowed, but the kind type parameters shall be the same. */
8333 if (case_expr
->ts
.type
== BT_CHARACTER
&& e
->ts
.kind
!= case_expr
->ts
.kind
)
8335 gfc_error ("Expression in CASE statement at %L must be of kind %d",
8336 &e
->where
, case_expr
->ts
.kind
);
8340 /* Convert the case value kind to that of case expression kind,
8343 if (e
->ts
.kind
!= case_expr
->ts
.kind
)
8344 gfc_convert_type_warn (e
, &case_expr
->ts
, 2, 0);
8348 gfc_error ("Expression in CASE statement at %L must be scalar",
8357 /* Given a completely parsed select statement, we:
8359 - Validate all expressions and code within the SELECT.
8360 - Make sure that the selection expression is not of the wrong type.
8361 - Make sure that no case ranges overlap.
8362 - Eliminate unreachable cases and unreachable code resulting from
8363 removing case labels.
8365 The standard does allow unreachable cases, e.g. CASE (5:3). But
8366 they are a hassle for code generation, and to prevent that, we just
8367 cut them out here. This is not necessary for overlapping cases
8368 because they are illegal and we never even try to generate code.
8370 We have the additional caveat that a SELECT construct could have
8371 been a computed GOTO in the source code. Fortunately we can fairly
8372 easily work around that here: The case_expr for a "real" SELECT CASE
8373 is in code->expr1, but for a computed GOTO it is in code->expr2. All
8374 we have to do is make sure that the case_expr is a scalar integer
8378 resolve_select (gfc_code
*code
, bool select_type
)
8381 gfc_expr
*case_expr
;
8382 gfc_case
*cp
, *default_case
, *tail
, *head
;
8383 int seen_unreachable
;
8389 if (code
->expr1
== NULL
)
8391 /* This was actually a computed GOTO statement. */
8392 case_expr
= code
->expr2
;
8393 if (case_expr
->ts
.type
!= BT_INTEGER
|| case_expr
->rank
!= 0)
8394 gfc_error ("Selection expression in computed GOTO statement "
8395 "at %L must be a scalar integer expression",
8398 /* Further checking is not necessary because this SELECT was built
8399 by the compiler, so it should always be OK. Just move the
8400 case_expr from expr2 to expr so that we can handle computed
8401 GOTOs as normal SELECTs from here on. */
8402 code
->expr1
= code
->expr2
;
8407 case_expr
= code
->expr1
;
8408 type
= case_expr
->ts
.type
;
8411 if (type
!= BT_LOGICAL
&& type
!= BT_INTEGER
&& type
!= BT_CHARACTER
)
8413 gfc_error ("Argument of SELECT statement at %L cannot be %s",
8414 &case_expr
->where
, gfc_typename (&case_expr
->ts
));
8416 /* Punt. Going on here just produce more garbage error messages. */
8421 if (!select_type
&& case_expr
->rank
!= 0)
8423 gfc_error ("Argument of SELECT statement at %L must be a scalar "
8424 "expression", &case_expr
->where
);
8430 /* Raise a warning if an INTEGER case value exceeds the range of
8431 the case-expr. Later, all expressions will be promoted to the
8432 largest kind of all case-labels. */
8434 if (type
== BT_INTEGER
)
8435 for (body
= code
->block
; body
; body
= body
->block
)
8436 for (cp
= body
->ext
.block
.case_list
; cp
; cp
= cp
->next
)
8439 && gfc_check_integer_range (cp
->low
->value
.integer
,
8440 case_expr
->ts
.kind
) != ARITH_OK
)
8441 gfc_warning (0, "Expression in CASE statement at %L is "
8442 "not in the range of %s", &cp
->low
->where
,
8443 gfc_typename (&case_expr
->ts
));
8446 && cp
->low
!= cp
->high
8447 && gfc_check_integer_range (cp
->high
->value
.integer
,
8448 case_expr
->ts
.kind
) != ARITH_OK
)
8449 gfc_warning (0, "Expression in CASE statement at %L is "
8450 "not in the range of %s", &cp
->high
->where
,
8451 gfc_typename (&case_expr
->ts
));
8454 /* PR 19168 has a long discussion concerning a mismatch of the kinds
8455 of the SELECT CASE expression and its CASE values. Walk the lists
8456 of case values, and if we find a mismatch, promote case_expr to
8457 the appropriate kind. */
8459 if (type
== BT_LOGICAL
|| type
== BT_INTEGER
)
8461 for (body
= code
->block
; body
; body
= body
->block
)
8463 /* Walk the case label list. */
8464 for (cp
= body
->ext
.block
.case_list
; cp
; cp
= cp
->next
)
8466 /* Intercept the DEFAULT case. It does not have a kind. */
8467 if (cp
->low
== NULL
&& cp
->high
== NULL
)
8470 /* Unreachable case ranges are discarded, so ignore. */
8471 if (cp
->low
!= NULL
&& cp
->high
!= NULL
8472 && cp
->low
!= cp
->high
8473 && gfc_compare_expr (cp
->low
, cp
->high
, INTRINSIC_GT
) > 0)
8477 && case_expr
->ts
.kind
!= gfc_kind_max(case_expr
, cp
->low
))
8478 gfc_convert_type_warn (case_expr
, &cp
->low
->ts
, 2, 0);
8480 if (cp
->high
!= NULL
8481 && case_expr
->ts
.kind
!= gfc_kind_max(case_expr
, cp
->high
))
8482 gfc_convert_type_warn (case_expr
, &cp
->high
->ts
, 2, 0);
8487 /* Assume there is no DEFAULT case. */
8488 default_case
= NULL
;
8493 for (body
= code
->block
; body
; body
= body
->block
)
8495 /* Assume the CASE list is OK, and all CASE labels can be matched. */
8497 seen_unreachable
= 0;
8499 /* Walk the case label list, making sure that all case labels
8501 for (cp
= body
->ext
.block
.case_list
; cp
; cp
= cp
->next
)
8503 /* Count the number of cases in the whole construct. */
8506 /* Intercept the DEFAULT case. */
8507 if (cp
->low
== NULL
&& cp
->high
== NULL
)
8509 if (default_case
!= NULL
)
8511 gfc_error ("The DEFAULT CASE at %L cannot be followed "
8512 "by a second DEFAULT CASE at %L",
8513 &default_case
->where
, &cp
->where
);
8524 /* Deal with single value cases and case ranges. Errors are
8525 issued from the validation function. */
8526 if (!validate_case_label_expr (cp
->low
, case_expr
)
8527 || !validate_case_label_expr (cp
->high
, case_expr
))
8533 if (type
== BT_LOGICAL
8534 && ((cp
->low
== NULL
|| cp
->high
== NULL
)
8535 || cp
->low
!= cp
->high
))
8537 gfc_error ("Logical range in CASE statement at %L is not "
8538 "allowed", &cp
->low
->where
);
8543 if (type
== BT_LOGICAL
&& cp
->low
->expr_type
== EXPR_CONSTANT
)
8546 value
= cp
->low
->value
.logical
== 0 ? 2 : 1;
8547 if (value
& seen_logical
)
8549 gfc_error ("Constant logical value in CASE statement "
8550 "is repeated at %L",
8555 seen_logical
|= value
;
8558 if (cp
->low
!= NULL
&& cp
->high
!= NULL
8559 && cp
->low
!= cp
->high
8560 && gfc_compare_expr (cp
->low
, cp
->high
, INTRINSIC_GT
) > 0)
8562 if (warn_surprising
)
8563 gfc_warning (OPT_Wsurprising
,
8564 "Range specification at %L can never be matched",
8567 cp
->unreachable
= 1;
8568 seen_unreachable
= 1;
8572 /* If the case range can be matched, it can also overlap with
8573 other cases. To make sure it does not, we put it in a
8574 double linked list here. We sort that with a merge sort
8575 later on to detect any overlapping cases. */
8579 head
->right
= head
->left
= NULL
;
8584 tail
->right
->left
= tail
;
8591 /* It there was a failure in the previous case label, give up
8592 for this case label list. Continue with the next block. */
8596 /* See if any case labels that are unreachable have been seen.
8597 If so, we eliminate them. This is a bit of a kludge because
8598 the case lists for a single case statement (label) is a
8599 single forward linked lists. */
8600 if (seen_unreachable
)
8602 /* Advance until the first case in the list is reachable. */
8603 while (body
->ext
.block
.case_list
!= NULL
8604 && body
->ext
.block
.case_list
->unreachable
)
8606 gfc_case
*n
= body
->ext
.block
.case_list
;
8607 body
->ext
.block
.case_list
= body
->ext
.block
.case_list
->next
;
8609 gfc_free_case_list (n
);
8612 /* Strip all other unreachable cases. */
8613 if (body
->ext
.block
.case_list
)
8615 for (cp
= body
->ext
.block
.case_list
; cp
&& cp
->next
; cp
= cp
->next
)
8617 if (cp
->next
->unreachable
)
8619 gfc_case
*n
= cp
->next
;
8620 cp
->next
= cp
->next
->next
;
8622 gfc_free_case_list (n
);
8629 /* See if there were overlapping cases. If the check returns NULL,
8630 there was overlap. In that case we don't do anything. If head
8631 is non-NULL, we prepend the DEFAULT case. The sorted list can
8632 then used during code generation for SELECT CASE constructs with
8633 a case expression of a CHARACTER type. */
8636 head
= check_case_overlap (head
);
8638 /* Prepend the default_case if it is there. */
8639 if (head
!= NULL
&& default_case
)
8641 default_case
->left
= NULL
;
8642 default_case
->right
= head
;
8643 head
->left
= default_case
;
8647 /* Eliminate dead blocks that may be the result if we've seen
8648 unreachable case labels for a block. */
8649 for (body
= code
; body
&& body
->block
; body
= body
->block
)
8651 if (body
->block
->ext
.block
.case_list
== NULL
)
8653 /* Cut the unreachable block from the code chain. */
8654 gfc_code
*c
= body
->block
;
8655 body
->block
= c
->block
;
8657 /* Kill the dead block, but not the blocks below it. */
8659 gfc_free_statements (c
);
8663 /* More than two cases is legal but insane for logical selects.
8664 Issue a warning for it. */
8665 if (warn_surprising
&& type
== BT_LOGICAL
&& ncases
> 2)
8666 gfc_warning (OPT_Wsurprising
,
8667 "Logical SELECT CASE block at %L has more that two cases",
8672 /* Check if a derived type is extensible. */
8675 gfc_type_is_extensible (gfc_symbol
*sym
)
8677 return !(sym
->attr
.is_bind_c
|| sym
->attr
.sequence
8678 || (sym
->attr
.is_class
8679 && sym
->components
->ts
.u
.derived
->attr
.unlimited_polymorphic
));
8684 resolve_types (gfc_namespace
*ns
);
8686 /* Resolve an associate-name: Resolve target and ensure the type-spec is
8687 correct as well as possibly the array-spec. */
8690 resolve_assoc_var (gfc_symbol
* sym
, bool resolve_target
)
8694 gcc_assert (sym
->assoc
);
8695 gcc_assert (sym
->attr
.flavor
== FL_VARIABLE
);
8697 /* If this is for SELECT TYPE, the target may not yet be set. In that
8698 case, return. Resolution will be called later manually again when
8700 target
= sym
->assoc
->target
;
8703 gcc_assert (!sym
->assoc
->dangling
);
8705 if (resolve_target
&& !gfc_resolve_expr (target
))
8708 /* For variable targets, we get some attributes from the target. */
8709 if (target
->expr_type
== EXPR_VARIABLE
)
8713 gcc_assert (target
->symtree
);
8714 tsym
= target
->symtree
->n
.sym
;
8716 sym
->attr
.asynchronous
= tsym
->attr
.asynchronous
;
8717 sym
->attr
.volatile_
= tsym
->attr
.volatile_
;
8719 sym
->attr
.target
= tsym
->attr
.target
8720 || gfc_expr_attr (target
).pointer
;
8721 if (is_subref_array (target
))
8722 sym
->attr
.subref_array_pointer
= 1;
8725 if (target
->expr_type
== EXPR_NULL
)
8727 gfc_error ("Selector at %L cannot be NULL()", &target
->where
);
8730 else if (target
->ts
.type
== BT_UNKNOWN
)
8732 gfc_error ("Selector at %L has no type", &target
->where
);
8736 /* Get type if this was not already set. Note that it can be
8737 some other type than the target in case this is a SELECT TYPE
8738 selector! So we must not update when the type is already there. */
8739 if (sym
->ts
.type
== BT_UNKNOWN
)
8740 sym
->ts
= target
->ts
;
8742 gcc_assert (sym
->ts
.type
!= BT_UNKNOWN
);
8744 /* See if this is a valid association-to-variable. */
8745 sym
->assoc
->variable
= (target
->expr_type
== EXPR_VARIABLE
8746 && !gfc_has_vector_subscript (target
));
8748 /* Finally resolve if this is an array or not. */
8749 if (sym
->attr
.dimension
&& target
->rank
== 0)
8751 /* primary.c makes the assumption that a reference to an associate
8752 name followed by a left parenthesis is an array reference. */
8753 if (sym
->ts
.type
!= BT_CHARACTER
)
8754 gfc_error ("Associate-name %qs at %L is used as array",
8755 sym
->name
, &sym
->declared_at
);
8756 sym
->attr
.dimension
= 0;
8761 /* We cannot deal with class selectors that need temporaries. */
8762 if (target
->ts
.type
== BT_CLASS
8763 && gfc_ref_needs_temporary_p (target
->ref
))
8765 gfc_error ("CLASS selector at %L needs a temporary which is not "
8766 "yet implemented", &target
->where
);
8770 if (target
->ts
.type
== BT_CLASS
)
8771 gfc_fix_class_refs (target
);
8773 if (target
->rank
!= 0)
8776 /* The rank may be incorrectly guessed at parsing, therefore make sure
8777 it is corrected now. */
8778 if (sym
->ts
.type
!= BT_CLASS
&& (!sym
->as
|| sym
->assoc
->rankguessed
))
8781 sym
->as
= gfc_get_array_spec ();
8783 as
->rank
= target
->rank
;
8784 as
->type
= AS_DEFERRED
;
8785 as
->corank
= gfc_get_corank (target
);
8786 sym
->attr
.dimension
= 1;
8787 if (as
->corank
!= 0)
8788 sym
->attr
.codimension
= 1;
8790 else if (sym
->ts
.type
== BT_CLASS
&& (!CLASS_DATA (sym
)->as
|| sym
->assoc
->rankguessed
))
8792 if (!CLASS_DATA (sym
)->as
)
8793 CLASS_DATA (sym
)->as
= gfc_get_array_spec ();
8794 as
= CLASS_DATA (sym
)->as
;
8795 as
->rank
= target
->rank
;
8796 as
->type
= AS_DEFERRED
;
8797 as
->corank
= gfc_get_corank (target
);
8798 CLASS_DATA (sym
)->attr
.dimension
= 1;
8799 if (as
->corank
!= 0)
8800 CLASS_DATA (sym
)->attr
.codimension
= 1;
8805 /* target's rank is 0, but the type of the sym is still array valued,
8806 which has to be corrected. */
8807 if (sym
->ts
.type
== BT_CLASS
8808 && CLASS_DATA (sym
) && CLASS_DATA (sym
)->as
)
8811 symbol_attribute attr
;
8812 /* The associated variable's type is still the array type
8813 correct this now. */
8814 gfc_typespec
*ts
= &target
->ts
;
8817 for (ref
= target
->ref
; ref
!= NULL
; ref
= ref
->next
)
8822 ts
= &ref
->u
.c
.component
->ts
;
8825 if (ts
->type
== BT_CLASS
)
8826 ts
= &ts
->u
.derived
->components
->ts
;
8832 /* Create a scalar instance of the current class type. Because the
8833 rank of a class array goes into its name, the type has to be
8834 rebuild. The alternative of (re-)setting just the attributes
8835 and as in the current type, destroys the type also in other
8839 sym
->ts
.type
= BT_CLASS
;
8840 attr
= CLASS_DATA (sym
)->attr
;
8842 attr
.associate_var
= 1;
8843 attr
.dimension
= attr
.codimension
= 0;
8844 attr
.class_pointer
= 1;
8845 if (!gfc_build_class_symbol (&sym
->ts
, &attr
, &as
))
8847 /* Make sure the _vptr is set. */
8848 c
= gfc_find_component (sym
->ts
.u
.derived
, "_vptr", true, true, NULL
);
8849 if (c
->ts
.u
.derived
== NULL
)
8850 c
->ts
.u
.derived
= gfc_find_derived_vtab (sym
->ts
.u
.derived
);
8851 CLASS_DATA (sym
)->attr
.pointer
= 1;
8852 CLASS_DATA (sym
)->attr
.class_pointer
= 1;
8853 gfc_set_sym_referenced (sym
->ts
.u
.derived
);
8854 gfc_commit_symbol (sym
->ts
.u
.derived
);
8855 /* _vptr now has the _vtab in it, change it to the _vtype. */
8856 if (c
->ts
.u
.derived
->attr
.vtab
)
8857 c
->ts
.u
.derived
= c
->ts
.u
.derived
->ts
.u
.derived
;
8858 c
->ts
.u
.derived
->ns
->types_resolved
= 0;
8859 resolve_types (c
->ts
.u
.derived
->ns
);
8863 /* Mark this as an associate variable. */
8864 sym
->attr
.associate_var
= 1;
8866 /* Fix up the type-spec for CHARACTER types. */
8867 if (sym
->ts
.type
== BT_CHARACTER
&& !sym
->attr
.select_type_temporary
)
8870 sym
->ts
.u
.cl
= target
->ts
.u
.cl
;
8872 if (sym
->ts
.deferred
&& target
->expr_type
== EXPR_VARIABLE
8873 && target
->symtree
->n
.sym
->attr
.dummy
8874 && sym
->ts
.u
.cl
== target
->ts
.u
.cl
)
8876 sym
->ts
.u
.cl
= gfc_new_charlen (sym
->ns
, NULL
);
8877 sym
->ts
.deferred
= 1;
8880 if (!sym
->ts
.u
.cl
->length
8881 && !sym
->ts
.deferred
8882 && target
->expr_type
== EXPR_CONSTANT
)
8884 sym
->ts
.u
.cl
->length
=
8885 gfc_get_int_expr (gfc_charlen_int_kind
, NULL
,
8886 target
->value
.character
.length
);
8888 else if ((!sym
->ts
.u
.cl
->length
8889 || sym
->ts
.u
.cl
->length
->expr_type
!= EXPR_CONSTANT
)
8890 && target
->expr_type
!= EXPR_VARIABLE
)
8892 sym
->ts
.u
.cl
= gfc_new_charlen (sym
->ns
, NULL
);
8893 sym
->ts
.deferred
= 1;
8895 /* This is reset in trans-stmt.c after the assignment
8896 of the target expression to the associate name. */
8897 sym
->attr
.allocatable
= 1;
8901 /* If the target is a good class object, so is the associate variable. */
8902 if (sym
->ts
.type
== BT_CLASS
&& gfc_expr_attr (target
).class_ok
)
8903 sym
->attr
.class_ok
= 1;
8907 /* Ensure that SELECT TYPE expressions have the correct rank and a full
8908 array reference, where necessary. The symbols are artificial and so
8909 the dimension attribute and arrayspec can also be set. In addition,
8910 sometimes the expr1 arrives as BT_DERIVED, when the symbol is BT_CLASS.
8911 This is corrected here as well.*/
8914 fixup_array_ref (gfc_expr
**expr1
, gfc_expr
*expr2
,
8915 int rank
, gfc_ref
*ref
)
8917 gfc_ref
*nref
= (*expr1
)->ref
;
8918 gfc_symbol
*sym1
= (*expr1
)->symtree
->n
.sym
;
8919 gfc_symbol
*sym2
= expr2
? expr2
->symtree
->n
.sym
: NULL
;
8920 (*expr1
)->rank
= rank
;
8921 if (sym1
->ts
.type
== BT_CLASS
)
8923 if ((*expr1
)->ts
.type
!= BT_CLASS
)
8924 (*expr1
)->ts
= sym1
->ts
;
8926 CLASS_DATA (sym1
)->attr
.dimension
= 1;
8927 if (CLASS_DATA (sym1
)->as
== NULL
&& sym2
)
8928 CLASS_DATA (sym1
)->as
8929 = gfc_copy_array_spec (CLASS_DATA (sym2
)->as
);
8933 sym1
->attr
.dimension
= 1;
8934 if (sym1
->as
== NULL
&& sym2
)
8935 sym1
->as
= gfc_copy_array_spec (sym2
->as
);
8938 for (; nref
; nref
= nref
->next
)
8939 if (nref
->next
== NULL
)
8942 if (ref
&& nref
&& nref
->type
!= REF_ARRAY
)
8943 nref
->next
= gfc_copy_ref (ref
);
8944 else if (ref
&& !nref
)
8945 (*expr1
)->ref
= gfc_copy_ref (ref
);
8950 build_loc_call (gfc_expr
*sym_expr
)
8953 loc_call
= gfc_get_expr ();
8954 loc_call
->expr_type
= EXPR_FUNCTION
;
8955 gfc_get_sym_tree ("_loc", gfc_current_ns
, &loc_call
->symtree
, false);
8956 loc_call
->symtree
->n
.sym
->attr
.flavor
= FL_PROCEDURE
;
8957 loc_call
->symtree
->n
.sym
->attr
.intrinsic
= 1;
8958 loc_call
->symtree
->n
.sym
->result
= loc_call
->symtree
->n
.sym
;
8959 gfc_commit_symbol (loc_call
->symtree
->n
.sym
);
8960 loc_call
->ts
.type
= BT_INTEGER
;
8961 loc_call
->ts
.kind
= gfc_index_integer_kind
;
8962 loc_call
->value
.function
.isym
= gfc_intrinsic_function_by_id (GFC_ISYM_LOC
);
8963 loc_call
->value
.function
.actual
= gfc_get_actual_arglist ();
8964 loc_call
->value
.function
.actual
->expr
= sym_expr
;
8965 loc_call
->where
= sym_expr
->where
;
8969 /* Resolve a SELECT TYPE statement. */
8972 resolve_select_type (gfc_code
*code
, gfc_namespace
*old_ns
)
8974 gfc_symbol
*selector_type
;
8975 gfc_code
*body
, *new_st
, *if_st
, *tail
;
8976 gfc_code
*class_is
= NULL
, *default_case
= NULL
;
8979 char name
[GFC_MAX_SYMBOL_LEN
];
8983 gfc_ref
* ref
= NULL
;
8984 gfc_expr
*selector_expr
= NULL
;
8986 ns
= code
->ext
.block
.ns
;
8989 /* Check for F03:C813. */
8990 if (code
->expr1
->ts
.type
!= BT_CLASS
8991 && !(code
->expr2
&& code
->expr2
->ts
.type
== BT_CLASS
))
8993 gfc_error ("Selector shall be polymorphic in SELECT TYPE statement "
8994 "at %L", &code
->loc
);
8998 if (!code
->expr1
->symtree
->n
.sym
->attr
.class_ok
)
9003 gfc_ref
*ref2
= NULL
;
9004 for (ref
= code
->expr2
->ref
; ref
!= NULL
; ref
= ref
->next
)
9005 if (ref
->type
== REF_COMPONENT
9006 && ref
->u
.c
.component
->ts
.type
== BT_CLASS
)
9011 if (code
->expr1
->symtree
->n
.sym
->attr
.untyped
)
9012 code
->expr1
->symtree
->n
.sym
->ts
= ref2
->u
.c
.component
->ts
;
9013 selector_type
= CLASS_DATA (ref2
->u
.c
.component
)->ts
.u
.derived
;
9017 if (code
->expr1
->symtree
->n
.sym
->attr
.untyped
)
9018 code
->expr1
->symtree
->n
.sym
->ts
= code
->expr2
->ts
;
9019 selector_type
= CLASS_DATA (code
->expr2
)->ts
.u
.derived
;
9022 if (code
->expr2
->rank
&& CLASS_DATA (code
->expr1
)->as
)
9023 CLASS_DATA (code
->expr1
)->as
->rank
= code
->expr2
->rank
;
9025 /* F2008: C803 The selector expression must not be coindexed. */
9026 if (gfc_is_coindexed (code
->expr2
))
9028 gfc_error ("Selector at %L must not be coindexed",
9029 &code
->expr2
->where
);
9036 selector_type
= CLASS_DATA (code
->expr1
)->ts
.u
.derived
;
9038 if (gfc_is_coindexed (code
->expr1
))
9040 gfc_error ("Selector at %L must not be coindexed",
9041 &code
->expr1
->where
);
9046 /* Loop over TYPE IS / CLASS IS cases. */
9047 for (body
= code
->block
; body
; body
= body
->block
)
9049 c
= body
->ext
.block
.case_list
;
9053 /* Check for repeated cases. */
9054 for (tail
= code
->block
; tail
; tail
= tail
->block
)
9056 gfc_case
*d
= tail
->ext
.block
.case_list
;
9060 if (c
->ts
.type
== d
->ts
.type
9061 && ((c
->ts
.type
== BT_DERIVED
9062 && c
->ts
.u
.derived
&& d
->ts
.u
.derived
9063 && !strcmp (c
->ts
.u
.derived
->name
,
9064 d
->ts
.u
.derived
->name
))
9065 || c
->ts
.type
== BT_UNKNOWN
9066 || (!(c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
9067 && c
->ts
.kind
== d
->ts
.kind
)))
9069 gfc_error ("TYPE IS at %L overlaps with TYPE IS at %L",
9070 &c
->where
, &d
->where
);
9076 /* Check F03:C815. */
9077 if ((c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
9078 && !selector_type
->attr
.unlimited_polymorphic
9079 && !gfc_type_is_extensible (c
->ts
.u
.derived
))
9081 gfc_error ("Derived type %qs at %L must be extensible",
9082 c
->ts
.u
.derived
->name
, &c
->where
);
9087 /* Check F03:C816. */
9088 if (c
->ts
.type
!= BT_UNKNOWN
&& !selector_type
->attr
.unlimited_polymorphic
9089 && ((c
->ts
.type
!= BT_DERIVED
&& c
->ts
.type
!= BT_CLASS
)
9090 || !gfc_type_is_extension_of (selector_type
, c
->ts
.u
.derived
)))
9092 if (c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
9093 gfc_error ("Derived type %qs at %L must be an extension of %qs",
9094 c
->ts
.u
.derived
->name
, &c
->where
, selector_type
->name
);
9096 gfc_error ("Unexpected intrinsic type %qs at %L",
9097 gfc_basic_typename (c
->ts
.type
), &c
->where
);
9102 /* Check F03:C814. */
9103 if (c
->ts
.type
== BT_CHARACTER
9104 && (c
->ts
.u
.cl
->length
!= NULL
|| c
->ts
.deferred
))
9106 gfc_error ("The type-spec at %L shall specify that each length "
9107 "type parameter is assumed", &c
->where
);
9112 /* Intercept the DEFAULT case. */
9113 if (c
->ts
.type
== BT_UNKNOWN
)
9115 /* Check F03:C818. */
9118 gfc_error ("The DEFAULT CASE at %L cannot be followed "
9119 "by a second DEFAULT CASE at %L",
9120 &default_case
->ext
.block
.case_list
->where
, &c
->where
);
9125 default_case
= body
;
9132 /* Transform SELECT TYPE statement to BLOCK and associate selector to
9133 target if present. If there are any EXIT statements referring to the
9134 SELECT TYPE construct, this is no problem because the gfc_code
9135 reference stays the same and EXIT is equally possible from the BLOCK
9136 it is changed to. */
9137 code
->op
= EXEC_BLOCK
;
9140 gfc_association_list
* assoc
;
9142 assoc
= gfc_get_association_list ();
9143 assoc
->st
= code
->expr1
->symtree
;
9144 assoc
->target
= gfc_copy_expr (code
->expr2
);
9145 assoc
->target
->where
= code
->expr2
->where
;
9146 /* assoc->variable will be set by resolve_assoc_var. */
9148 code
->ext
.block
.assoc
= assoc
;
9149 code
->expr1
->symtree
->n
.sym
->assoc
= assoc
;
9151 resolve_assoc_var (code
->expr1
->symtree
->n
.sym
, false);
9154 code
->ext
.block
.assoc
= NULL
;
9156 /* Ensure that the selector rank and arrayspec are available to
9157 correct expressions in which they might be missing. */
9158 if (code
->expr2
&& code
->expr2
->rank
)
9160 rank
= code
->expr2
->rank
;
9161 for (ref
= code
->expr2
->ref
; ref
; ref
= ref
->next
)
9162 if (ref
->next
== NULL
)
9164 if (ref
&& ref
->type
== REF_ARRAY
)
9165 ref
= gfc_copy_ref (ref
);
9167 /* Fixup expr1 if necessary. */
9169 fixup_array_ref (&code
->expr1
, code
->expr2
, rank
, ref
);
9171 else if (code
->expr1
->rank
)
9173 rank
= code
->expr1
->rank
;
9174 for (ref
= code
->expr1
->ref
; ref
; ref
= ref
->next
)
9175 if (ref
->next
== NULL
)
9177 if (ref
&& ref
->type
== REF_ARRAY
)
9178 ref
= gfc_copy_ref (ref
);
9181 /* Add EXEC_SELECT to switch on type. */
9182 new_st
= gfc_get_code (code
->op
);
9183 new_st
->expr1
= code
->expr1
;
9184 new_st
->expr2
= code
->expr2
;
9185 new_st
->block
= code
->block
;
9186 code
->expr1
= code
->expr2
= NULL
;
9191 ns
->code
->next
= new_st
;
9193 code
->op
= EXEC_SELECT_TYPE
;
9195 /* Use the intrinsic LOC function to generate an integer expression
9196 for the vtable of the selector. Note that the rank of the selector
9197 expression has to be set to zero. */
9198 gfc_add_vptr_component (code
->expr1
);
9199 code
->expr1
->rank
= 0;
9200 code
->expr1
= build_loc_call (code
->expr1
);
9201 selector_expr
= code
->expr1
->value
.function
.actual
->expr
;
9203 /* Loop over TYPE IS / CLASS IS cases. */
9204 for (body
= code
->block
; body
; body
= body
->block
)
9208 c
= body
->ext
.block
.case_list
;
9210 /* Generate an index integer expression for address of the
9211 TYPE/CLASS vtable and store it in c->low. The hash expression
9212 is stored in c->high and is used to resolve intrinsic cases. */
9213 if (c
->ts
.type
!= BT_UNKNOWN
)
9215 if (c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
9217 vtab
= gfc_find_derived_vtab (c
->ts
.u
.derived
);
9219 c
->high
= gfc_get_int_expr (gfc_integer_4_kind
, NULL
,
9220 c
->ts
.u
.derived
->hash_value
);
9224 vtab
= gfc_find_vtab (&c
->ts
);
9225 gcc_assert (vtab
&& CLASS_DATA (vtab
)->initializer
);
9226 e
= CLASS_DATA (vtab
)->initializer
;
9227 c
->high
= gfc_copy_expr (e
);
9228 if (c
->high
->ts
.kind
!= gfc_integer_4_kind
)
9231 ts
.kind
= gfc_integer_4_kind
;
9232 ts
.type
= BT_INTEGER
;
9233 gfc_convert_type_warn (c
->high
, &ts
, 2, 0);
9237 e
= gfc_lval_expr_from_sym (vtab
);
9238 c
->low
= build_loc_call (e
);
9243 /* Associate temporary to selector. This should only be done
9244 when this case is actually true, so build a new ASSOCIATE
9245 that does precisely this here (instead of using the
9248 if (c
->ts
.type
== BT_CLASS
)
9249 sprintf (name
, "__tmp_class_%s", c
->ts
.u
.derived
->name
);
9250 else if (c
->ts
.type
== BT_DERIVED
)
9251 sprintf (name
, "__tmp_type_%s", c
->ts
.u
.derived
->name
);
9252 else if (c
->ts
.type
== BT_CHARACTER
)
9254 HOST_WIDE_INT charlen
= 0;
9255 if (c
->ts
.u
.cl
&& c
->ts
.u
.cl
->length
9256 && c
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
)
9257 charlen
= gfc_mpz_get_hwi (c
->ts
.u
.cl
->length
->value
.integer
);
9258 snprintf (name
, sizeof (name
),
9259 "__tmp_%s_" HOST_WIDE_INT_PRINT_DEC
"_%d",
9260 gfc_basic_typename (c
->ts
.type
), charlen
, c
->ts
.kind
);
9263 sprintf (name
, "__tmp_%s_%d", gfc_basic_typename (c
->ts
.type
),
9266 st
= gfc_find_symtree (ns
->sym_root
, name
);
9267 gcc_assert (st
->n
.sym
->assoc
);
9268 st
->n
.sym
->assoc
->target
= gfc_get_variable_expr (selector_expr
->symtree
);
9269 st
->n
.sym
->assoc
->target
->where
= selector_expr
->where
;
9270 if (c
->ts
.type
!= BT_CLASS
&& c
->ts
.type
!= BT_UNKNOWN
)
9272 gfc_add_data_component (st
->n
.sym
->assoc
->target
);
9273 /* Fixup the target expression if necessary. */
9275 fixup_array_ref (&st
->n
.sym
->assoc
->target
, NULL
, rank
, ref
);
9278 new_st
= gfc_get_code (EXEC_BLOCK
);
9279 new_st
->ext
.block
.ns
= gfc_build_block_ns (ns
);
9280 new_st
->ext
.block
.ns
->code
= body
->next
;
9281 body
->next
= new_st
;
9283 /* Chain in the new list only if it is marked as dangling. Otherwise
9284 there is a CASE label overlap and this is already used. Just ignore,
9285 the error is diagnosed elsewhere. */
9286 if (st
->n
.sym
->assoc
->dangling
)
9288 new_st
->ext
.block
.assoc
= st
->n
.sym
->assoc
;
9289 st
->n
.sym
->assoc
->dangling
= 0;
9292 resolve_assoc_var (st
->n
.sym
, false);
9295 /* Take out CLASS IS cases for separate treatment. */
9297 while (body
&& body
->block
)
9299 if (body
->block
->ext
.block
.case_list
->ts
.type
== BT_CLASS
)
9301 /* Add to class_is list. */
9302 if (class_is
== NULL
)
9304 class_is
= body
->block
;
9309 for (tail
= class_is
; tail
->block
; tail
= tail
->block
) ;
9310 tail
->block
= body
->block
;
9313 /* Remove from EXEC_SELECT list. */
9314 body
->block
= body
->block
->block
;
9327 /* Add a default case to hold the CLASS IS cases. */
9328 for (tail
= code
; tail
->block
; tail
= tail
->block
) ;
9329 tail
->block
= gfc_get_code (EXEC_SELECT_TYPE
);
9331 tail
->ext
.block
.case_list
= gfc_get_case ();
9332 tail
->ext
.block
.case_list
->ts
.type
= BT_UNKNOWN
;
9334 default_case
= tail
;
9337 /* More than one CLASS IS block? */
9338 if (class_is
->block
)
9342 /* Sort CLASS IS blocks by extension level. */
9346 for (c1
= &class_is
; (*c1
) && (*c1
)->block
; c1
= &((*c1
)->block
))
9349 /* F03:C817 (check for doubles). */
9350 if ((*c1
)->ext
.block
.case_list
->ts
.u
.derived
->hash_value
9351 == c2
->ext
.block
.case_list
->ts
.u
.derived
->hash_value
)
9353 gfc_error ("Double CLASS IS block in SELECT TYPE "
9355 &c2
->ext
.block
.case_list
->where
);
9358 if ((*c1
)->ext
.block
.case_list
->ts
.u
.derived
->attr
.extension
9359 < c2
->ext
.block
.case_list
->ts
.u
.derived
->attr
.extension
)
9362 (*c1
)->block
= c2
->block
;
9372 /* Generate IF chain. */
9373 if_st
= gfc_get_code (EXEC_IF
);
9375 for (body
= class_is
; body
; body
= body
->block
)
9377 new_st
->block
= gfc_get_code (EXEC_IF
);
9378 new_st
= new_st
->block
;
9379 /* Set up IF condition: Call _gfortran_is_extension_of. */
9380 new_st
->expr1
= gfc_get_expr ();
9381 new_st
->expr1
->expr_type
= EXPR_FUNCTION
;
9382 new_st
->expr1
->ts
.type
= BT_LOGICAL
;
9383 new_st
->expr1
->ts
.kind
= 4;
9384 new_st
->expr1
->value
.function
.name
= gfc_get_string (PREFIX ("is_extension_of"));
9385 new_st
->expr1
->value
.function
.isym
= XCNEW (gfc_intrinsic_sym
);
9386 new_st
->expr1
->value
.function
.isym
->id
= GFC_ISYM_EXTENDS_TYPE_OF
;
9387 /* Set up arguments. */
9388 new_st
->expr1
->value
.function
.actual
= gfc_get_actual_arglist ();
9389 new_st
->expr1
->value
.function
.actual
->expr
= gfc_get_variable_expr (selector_expr
->symtree
);
9390 new_st
->expr1
->value
.function
.actual
->expr
->where
= code
->loc
;
9391 new_st
->expr1
->where
= code
->loc
;
9392 gfc_add_vptr_component (new_st
->expr1
->value
.function
.actual
->expr
);
9393 vtab
= gfc_find_derived_vtab (body
->ext
.block
.case_list
->ts
.u
.derived
);
9394 st
= gfc_find_symtree (vtab
->ns
->sym_root
, vtab
->name
);
9395 new_st
->expr1
->value
.function
.actual
->next
= gfc_get_actual_arglist ();
9396 new_st
->expr1
->value
.function
.actual
->next
->expr
= gfc_get_variable_expr (st
);
9397 new_st
->expr1
->value
.function
.actual
->next
->expr
->where
= code
->loc
;
9398 new_st
->next
= body
->next
;
9400 if (default_case
->next
)
9402 new_st
->block
= gfc_get_code (EXEC_IF
);
9403 new_st
= new_st
->block
;
9404 new_st
->next
= default_case
->next
;
9407 /* Replace CLASS DEFAULT code by the IF chain. */
9408 default_case
->next
= if_st
;
9411 /* Resolve the internal code. This cannot be done earlier because
9412 it requires that the sym->assoc of selectors is set already. */
9413 gfc_current_ns
= ns
;
9414 gfc_resolve_blocks (code
->block
, gfc_current_ns
);
9415 gfc_current_ns
= old_ns
;
9422 /* Resolve a transfer statement. This is making sure that:
9423 -- a derived type being transferred has only non-pointer components
9424 -- a derived type being transferred doesn't have private components, unless
9425 it's being transferred from the module where the type was defined
9426 -- we're not trying to transfer a whole assumed size array. */
9429 resolve_transfer (gfc_code
*code
)
9431 gfc_symbol
*sym
, *derived
;
9435 bool formatted
= false;
9436 gfc_dt
*dt
= code
->ext
.dt
;
9437 gfc_symbol
*dtio_sub
= NULL
;
9441 while (exp
!= NULL
&& exp
->expr_type
== EXPR_OP
9442 && exp
->value
.op
.op
== INTRINSIC_PARENTHESES
)
9443 exp
= exp
->value
.op
.op1
;
9445 if (exp
&& exp
->expr_type
== EXPR_NULL
9448 gfc_error ("Invalid context for NULL () intrinsic at %L",
9453 if (exp
== NULL
|| (exp
->expr_type
!= EXPR_VARIABLE
9454 && exp
->expr_type
!= EXPR_FUNCTION
9455 && exp
->expr_type
!= EXPR_STRUCTURE
))
9458 /* If we are reading, the variable will be changed. Note that
9459 code->ext.dt may be NULL if the TRANSFER is related to
9460 an INQUIRE statement -- but in this case, we are not reading, either. */
9461 if (dt
&& dt
->dt_io_kind
->value
.iokind
== M_READ
9462 && !gfc_check_vardef_context (exp
, false, false, false,
9466 const gfc_typespec
*ts
= exp
->expr_type
== EXPR_STRUCTURE
9467 || exp
->expr_type
== EXPR_FUNCTION
9468 ? &exp
->ts
: &exp
->symtree
->n
.sym
->ts
;
9470 /* Go to actual component transferred. */
9471 for (ref
= exp
->ref
; ref
; ref
= ref
->next
)
9472 if (ref
->type
== REF_COMPONENT
)
9473 ts
= &ref
->u
.c
.component
->ts
;
9475 if (dt
&& dt
->dt_io_kind
->value
.iokind
!= M_INQUIRE
9476 && (ts
->type
== BT_DERIVED
|| ts
->type
== BT_CLASS
))
9478 derived
= ts
->u
.derived
;
9480 /* Determine when to use the formatted DTIO procedure. */
9481 if (dt
&& (dt
->format_expr
|| dt
->format_label
))
9484 write
= dt
->dt_io_kind
->value
.iokind
== M_WRITE
9485 || dt
->dt_io_kind
->value
.iokind
== M_PRINT
;
9486 dtio_sub
= gfc_find_specific_dtio_proc (derived
, write
, formatted
);
9488 if (dtio_sub
!= NULL
&& exp
->expr_type
== EXPR_VARIABLE
)
9491 sym
= exp
->symtree
->n
.sym
->ns
->proc_name
;
9492 /* Check to see if this is a nested DTIO call, with the
9493 dummy as the io-list object. */
9494 if (sym
&& sym
== dtio_sub
&& sym
->formal
9495 && sym
->formal
->sym
== exp
->symtree
->n
.sym
9496 && exp
->ref
== NULL
)
9498 if (!sym
->attr
.recursive
)
9500 gfc_error ("DTIO %s procedure at %L must be recursive",
9501 sym
->name
, &sym
->declared_at
);
9508 if (ts
->type
== BT_CLASS
&& dtio_sub
== NULL
)
9510 gfc_error ("Data transfer element at %L cannot be polymorphic unless "
9511 "it is processed by a defined input/output procedure",
9516 if (ts
->type
== BT_DERIVED
)
9518 /* Check that transferred derived type doesn't contain POINTER
9519 components unless it is processed by a defined input/output
9521 if (ts
->u
.derived
->attr
.pointer_comp
&& dtio_sub
== NULL
)
9523 gfc_error ("Data transfer element at %L cannot have POINTER "
9524 "components unless it is processed by a defined "
9525 "input/output procedure", &code
->loc
);
9530 if (ts
->u
.derived
->attr
.proc_pointer_comp
)
9532 gfc_error ("Data transfer element at %L cannot have "
9533 "procedure pointer components", &code
->loc
);
9537 if (ts
->u
.derived
->attr
.alloc_comp
&& dtio_sub
== NULL
)
9539 gfc_error ("Data transfer element at %L cannot have ALLOCATABLE "
9540 "components unless it is processed by a defined "
9541 "input/output procedure", &code
->loc
);
9545 /* C_PTR and C_FUNPTR have private components which means they cannot
9546 be printed. However, if -std=gnu and not -pedantic, allow
9547 the component to be printed to help debugging. */
9548 if (ts
->u
.derived
->ts
.f90_type
== BT_VOID
)
9550 if (!gfc_notify_std (GFC_STD_GNU
, "Data transfer element at %L "
9551 "cannot have PRIVATE components", &code
->loc
))
9554 else if (derived_inaccessible (ts
->u
.derived
) && dtio_sub
== NULL
)
9556 gfc_error ("Data transfer element at %L cannot have "
9557 "PRIVATE components unless it is processed by "
9558 "a defined input/output procedure", &code
->loc
);
9563 if (exp
->expr_type
== EXPR_STRUCTURE
)
9566 sym
= exp
->symtree
->n
.sym
;
9568 if (sym
->as
!= NULL
&& sym
->as
->type
== AS_ASSUMED_SIZE
&& exp
->ref
9569 && exp
->ref
->type
== REF_ARRAY
&& exp
->ref
->u
.ar
.type
== AR_FULL
)
9571 gfc_error ("Data transfer element at %L cannot be a full reference to "
9572 "an assumed-size array", &code
->loc
);
9576 if (async_io_dt
&& exp
->expr_type
== EXPR_VARIABLE
)
9577 exp
->symtree
->n
.sym
->attr
.asynchronous
= 1;
9581 /*********** Toplevel code resolution subroutines ***********/
9583 /* Find the set of labels that are reachable from this block. We also
9584 record the last statement in each block. */
9587 find_reachable_labels (gfc_code
*block
)
9594 cs_base
->reachable_labels
= bitmap_alloc (&labels_obstack
);
9596 /* Collect labels in this block. We don't keep those corresponding
9597 to END {IF|SELECT}, these are checked in resolve_branch by going
9598 up through the code_stack. */
9599 for (c
= block
; c
; c
= c
->next
)
9601 if (c
->here
&& c
->op
!= EXEC_END_NESTED_BLOCK
)
9602 bitmap_set_bit (cs_base
->reachable_labels
, c
->here
->value
);
9605 /* Merge with labels from parent block. */
9608 gcc_assert (cs_base
->prev
->reachable_labels
);
9609 bitmap_ior_into (cs_base
->reachable_labels
,
9610 cs_base
->prev
->reachable_labels
);
9616 resolve_lock_unlock_event (gfc_code
*code
)
9618 if (code
->expr1
->expr_type
== EXPR_FUNCTION
9619 && code
->expr1
->value
.function
.isym
9620 && code
->expr1
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
)
9621 remove_caf_get_intrinsic (code
->expr1
);
9623 if ((code
->op
== EXEC_LOCK
|| code
->op
== EXEC_UNLOCK
)
9624 && (code
->expr1
->ts
.type
!= BT_DERIVED
9625 || code
->expr1
->expr_type
!= EXPR_VARIABLE
9626 || code
->expr1
->ts
.u
.derived
->from_intmod
!= INTMOD_ISO_FORTRAN_ENV
9627 || code
->expr1
->ts
.u
.derived
->intmod_sym_id
!= ISOFORTRAN_LOCK_TYPE
9628 || code
->expr1
->rank
!= 0
9629 || (!gfc_is_coarray (code
->expr1
) &&
9630 !gfc_is_coindexed (code
->expr1
))))
9631 gfc_error ("Lock variable at %L must be a scalar of type LOCK_TYPE",
9632 &code
->expr1
->where
);
9633 else if ((code
->op
== EXEC_EVENT_POST
|| code
->op
== EXEC_EVENT_WAIT
)
9634 && (code
->expr1
->ts
.type
!= BT_DERIVED
9635 || code
->expr1
->expr_type
!= EXPR_VARIABLE
9636 || code
->expr1
->ts
.u
.derived
->from_intmod
9637 != INTMOD_ISO_FORTRAN_ENV
9638 || code
->expr1
->ts
.u
.derived
->intmod_sym_id
9639 != ISOFORTRAN_EVENT_TYPE
9640 || code
->expr1
->rank
!= 0))
9641 gfc_error ("Event variable at %L must be a scalar of type EVENT_TYPE",
9642 &code
->expr1
->where
);
9643 else if (code
->op
== EXEC_EVENT_POST
&& !gfc_is_coarray (code
->expr1
)
9644 && !gfc_is_coindexed (code
->expr1
))
9645 gfc_error ("Event variable argument at %L must be a coarray or coindexed",
9646 &code
->expr1
->where
);
9647 else if (code
->op
== EXEC_EVENT_WAIT
&& !gfc_is_coarray (code
->expr1
))
9648 gfc_error ("Event variable argument at %L must be a coarray but not "
9649 "coindexed", &code
->expr1
->where
);
9653 && (code
->expr2
->ts
.type
!= BT_INTEGER
|| code
->expr2
->rank
!= 0
9654 || code
->expr2
->expr_type
!= EXPR_VARIABLE
))
9655 gfc_error ("STAT= argument at %L must be a scalar INTEGER variable",
9656 &code
->expr2
->where
);
9659 && !gfc_check_vardef_context (code
->expr2
, false, false, false,
9660 _("STAT variable")))
9665 && (code
->expr3
->ts
.type
!= BT_CHARACTER
|| code
->expr3
->rank
!= 0
9666 || code
->expr3
->expr_type
!= EXPR_VARIABLE
))
9667 gfc_error ("ERRMSG= argument at %L must be a scalar CHARACTER variable",
9668 &code
->expr3
->where
);
9671 && !gfc_check_vardef_context (code
->expr3
, false, false, false,
9672 _("ERRMSG variable")))
9675 /* Check for LOCK the ACQUIRED_LOCK. */
9676 if (code
->op
!= EXEC_EVENT_WAIT
&& code
->expr4
9677 && (code
->expr4
->ts
.type
!= BT_LOGICAL
|| code
->expr4
->rank
!= 0
9678 || code
->expr4
->expr_type
!= EXPR_VARIABLE
))
9679 gfc_error ("ACQUIRED_LOCK= argument at %L must be a scalar LOGICAL "
9680 "variable", &code
->expr4
->where
);
9682 if (code
->op
!= EXEC_EVENT_WAIT
&& code
->expr4
9683 && !gfc_check_vardef_context (code
->expr4
, false, false, false,
9684 _("ACQUIRED_LOCK variable")))
9687 /* Check for EVENT WAIT the UNTIL_COUNT. */
9688 if (code
->op
== EXEC_EVENT_WAIT
&& code
->expr4
)
9690 if (!gfc_resolve_expr (code
->expr4
) || code
->expr4
->ts
.type
!= BT_INTEGER
9691 || code
->expr4
->rank
!= 0)
9692 gfc_error ("UNTIL_COUNT= argument at %L must be a scalar INTEGER "
9693 "expression", &code
->expr4
->where
);
9699 resolve_critical (gfc_code
*code
)
9701 gfc_symtree
*symtree
;
9702 gfc_symbol
*lock_type
;
9703 char name
[GFC_MAX_SYMBOL_LEN
];
9704 static int serial
= 0;
9706 if (flag_coarray
!= GFC_FCOARRAY_LIB
)
9709 symtree
= gfc_find_symtree (gfc_current_ns
->sym_root
,
9710 GFC_PREFIX ("lock_type"));
9712 lock_type
= symtree
->n
.sym
;
9715 if (gfc_get_sym_tree (GFC_PREFIX ("lock_type"), gfc_current_ns
, &symtree
,
9718 lock_type
= symtree
->n
.sym
;
9719 lock_type
->attr
.flavor
= FL_DERIVED
;
9720 lock_type
->attr
.zero_comp
= 1;
9721 lock_type
->from_intmod
= INTMOD_ISO_FORTRAN_ENV
;
9722 lock_type
->intmod_sym_id
= ISOFORTRAN_LOCK_TYPE
;
9725 sprintf(name
, GFC_PREFIX ("lock_var") "%d",serial
++);
9726 if (gfc_get_sym_tree (name
, gfc_current_ns
, &symtree
, false) != 0)
9729 code
->resolved_sym
= symtree
->n
.sym
;
9730 symtree
->n
.sym
->attr
.flavor
= FL_VARIABLE
;
9731 symtree
->n
.sym
->attr
.referenced
= 1;
9732 symtree
->n
.sym
->attr
.artificial
= 1;
9733 symtree
->n
.sym
->attr
.codimension
= 1;
9734 symtree
->n
.sym
->ts
.type
= BT_DERIVED
;
9735 symtree
->n
.sym
->ts
.u
.derived
= lock_type
;
9736 symtree
->n
.sym
->as
= gfc_get_array_spec ();
9737 symtree
->n
.sym
->as
->corank
= 1;
9738 symtree
->n
.sym
->as
->type
= AS_EXPLICIT
;
9739 symtree
->n
.sym
->as
->cotype
= AS_EXPLICIT
;
9740 symtree
->n
.sym
->as
->lower
[0] = gfc_get_int_expr (gfc_default_integer_kind
,
9742 gfc_commit_symbols();
9747 resolve_sync (gfc_code
*code
)
9749 /* Check imageset. The * case matches expr1 == NULL. */
9752 if (code
->expr1
->ts
.type
!= BT_INTEGER
|| code
->expr1
->rank
> 1)
9753 gfc_error ("Imageset argument at %L must be a scalar or rank-1 "
9754 "INTEGER expression", &code
->expr1
->where
);
9755 if (code
->expr1
->expr_type
== EXPR_CONSTANT
&& code
->expr1
->rank
== 0
9756 && mpz_cmp_si (code
->expr1
->value
.integer
, 1) < 0)
9757 gfc_error ("Imageset argument at %L must between 1 and num_images()",
9758 &code
->expr1
->where
);
9759 else if (code
->expr1
->expr_type
== EXPR_ARRAY
9760 && gfc_simplify_expr (code
->expr1
, 0))
9762 gfc_constructor
*cons
;
9763 cons
= gfc_constructor_first (code
->expr1
->value
.constructor
);
9764 for (; cons
; cons
= gfc_constructor_next (cons
))
9765 if (cons
->expr
->expr_type
== EXPR_CONSTANT
9766 && mpz_cmp_si (cons
->expr
->value
.integer
, 1) < 0)
9767 gfc_error ("Imageset argument at %L must between 1 and "
9768 "num_images()", &cons
->expr
->where
);
9773 gfc_resolve_expr (code
->expr2
);
9775 && (code
->expr2
->ts
.type
!= BT_INTEGER
|| code
->expr2
->rank
!= 0
9776 || code
->expr2
->expr_type
!= EXPR_VARIABLE
))
9777 gfc_error ("STAT= argument at %L must be a scalar INTEGER variable",
9778 &code
->expr2
->where
);
9781 gfc_resolve_expr (code
->expr3
);
9783 && (code
->expr3
->ts
.type
!= BT_CHARACTER
|| code
->expr3
->rank
!= 0
9784 || code
->expr3
->expr_type
!= EXPR_VARIABLE
))
9785 gfc_error ("ERRMSG= argument at %L must be a scalar CHARACTER variable",
9786 &code
->expr3
->where
);
9790 /* Given a branch to a label, see if the branch is conforming.
9791 The code node describes where the branch is located. */
9794 resolve_branch (gfc_st_label
*label
, gfc_code
*code
)
9801 /* Step one: is this a valid branching target? */
9803 if (label
->defined
== ST_LABEL_UNKNOWN
)
9805 gfc_error ("Label %d referenced at %L is never defined", label
->value
,
9810 if (label
->defined
!= ST_LABEL_TARGET
&& label
->defined
!= ST_LABEL_DO_TARGET
)
9812 gfc_error ("Statement at %L is not a valid branch target statement "
9813 "for the branch statement at %L", &label
->where
, &code
->loc
);
9817 /* Step two: make sure this branch is not a branch to itself ;-) */
9819 if (code
->here
== label
)
9822 "Branch at %L may result in an infinite loop", &code
->loc
);
9826 /* Step three: See if the label is in the same block as the
9827 branching statement. The hard work has been done by setting up
9828 the bitmap reachable_labels. */
9830 if (bitmap_bit_p (cs_base
->reachable_labels
, label
->value
))
9832 /* Check now whether there is a CRITICAL construct; if so, check
9833 whether the label is still visible outside of the CRITICAL block,
9834 which is invalid. */
9835 for (stack
= cs_base
; stack
; stack
= stack
->prev
)
9837 if (stack
->current
->op
== EXEC_CRITICAL
9838 && bitmap_bit_p (stack
->reachable_labels
, label
->value
))
9839 gfc_error ("GOTO statement at %L leaves CRITICAL construct for "
9840 "label at %L", &code
->loc
, &label
->where
);
9841 else if (stack
->current
->op
== EXEC_DO_CONCURRENT
9842 && bitmap_bit_p (stack
->reachable_labels
, label
->value
))
9843 gfc_error ("GOTO statement at %L leaves DO CONCURRENT construct "
9844 "for label at %L", &code
->loc
, &label
->where
);
9850 /* Step four: If we haven't found the label in the bitmap, it may
9851 still be the label of the END of the enclosing block, in which
9852 case we find it by going up the code_stack. */
9854 for (stack
= cs_base
; stack
; stack
= stack
->prev
)
9856 if (stack
->current
->next
&& stack
->current
->next
->here
== label
)
9858 if (stack
->current
->op
== EXEC_CRITICAL
)
9860 /* Note: A label at END CRITICAL does not leave the CRITICAL
9861 construct as END CRITICAL is still part of it. */
9862 gfc_error ("GOTO statement at %L leaves CRITICAL construct for label"
9863 " at %L", &code
->loc
, &label
->where
);
9866 else if (stack
->current
->op
== EXEC_DO_CONCURRENT
)
9868 gfc_error ("GOTO statement at %L leaves DO CONCURRENT construct for "
9869 "label at %L", &code
->loc
, &label
->where
);
9876 gcc_assert (stack
->current
->next
->op
== EXEC_END_NESTED_BLOCK
);
9880 /* The label is not in an enclosing block, so illegal. This was
9881 allowed in Fortran 66, so we allow it as extension. No
9882 further checks are necessary in this case. */
9883 gfc_notify_std (GFC_STD_LEGACY
, "Label at %L is not in the same block "
9884 "as the GOTO statement at %L", &label
->where
,
9890 /* Check whether EXPR1 has the same shape as EXPR2. */
9893 resolve_where_shape (gfc_expr
*expr1
, gfc_expr
*expr2
)
9895 mpz_t shape
[GFC_MAX_DIMENSIONS
];
9896 mpz_t shape2
[GFC_MAX_DIMENSIONS
];
9897 bool result
= false;
9900 /* Compare the rank. */
9901 if (expr1
->rank
!= expr2
->rank
)
9904 /* Compare the size of each dimension. */
9905 for (i
=0; i
<expr1
->rank
; i
++)
9907 if (!gfc_array_dimen_size (expr1
, i
, &shape
[i
]))
9910 if (!gfc_array_dimen_size (expr2
, i
, &shape2
[i
]))
9913 if (mpz_cmp (shape
[i
], shape2
[i
]))
9917 /* When either of the two expression is an assumed size array, we
9918 ignore the comparison of dimension sizes. */
9923 gfc_clear_shape (shape
, i
);
9924 gfc_clear_shape (shape2
, i
);
9929 /* Check whether a WHERE assignment target or a WHERE mask expression
9930 has the same shape as the outmost WHERE mask expression. */
9933 resolve_where (gfc_code
*code
, gfc_expr
*mask
)
9939 cblock
= code
->block
;
9941 /* Store the first WHERE mask-expr of the WHERE statement or construct.
9942 In case of nested WHERE, only the outmost one is stored. */
9943 if (mask
== NULL
) /* outmost WHERE */
9945 else /* inner WHERE */
9952 /* Check if the mask-expr has a consistent shape with the
9953 outmost WHERE mask-expr. */
9954 if (!resolve_where_shape (cblock
->expr1
, e
))
9955 gfc_error ("WHERE mask at %L has inconsistent shape",
9956 &cblock
->expr1
->where
);
9959 /* the assignment statement of a WHERE statement, or the first
9960 statement in where-body-construct of a WHERE construct */
9961 cnext
= cblock
->next
;
9966 /* WHERE assignment statement */
9969 /* Check shape consistent for WHERE assignment target. */
9970 if (e
&& !resolve_where_shape (cnext
->expr1
, e
))
9971 gfc_error ("WHERE assignment target at %L has "
9972 "inconsistent shape", &cnext
->expr1
->where
);
9976 case EXEC_ASSIGN_CALL
:
9977 resolve_call (cnext
);
9978 if (!cnext
->resolved_sym
->attr
.elemental
)
9979 gfc_error("Non-ELEMENTAL user-defined assignment in WHERE at %L",
9980 &cnext
->ext
.actual
->expr
->where
);
9983 /* WHERE or WHERE construct is part of a where-body-construct */
9985 resolve_where (cnext
, e
);
9989 gfc_error ("Unsupported statement inside WHERE at %L",
9992 /* the next statement within the same where-body-construct */
9993 cnext
= cnext
->next
;
9995 /* the next masked-elsewhere-stmt, elsewhere-stmt, or end-where-stmt */
9996 cblock
= cblock
->block
;
10001 /* Resolve assignment in FORALL construct.
10002 NVAR is the number of FORALL index variables, and VAR_EXPR records the
10003 FORALL index variables. */
10006 gfc_resolve_assign_in_forall (gfc_code
*code
, int nvar
, gfc_expr
**var_expr
)
10010 for (n
= 0; n
< nvar
; n
++)
10012 gfc_symbol
*forall_index
;
10014 forall_index
= var_expr
[n
]->symtree
->n
.sym
;
10016 /* Check whether the assignment target is one of the FORALL index
10018 if ((code
->expr1
->expr_type
== EXPR_VARIABLE
)
10019 && (code
->expr1
->symtree
->n
.sym
== forall_index
))
10020 gfc_error ("Assignment to a FORALL index variable at %L",
10021 &code
->expr1
->where
);
10024 /* If one of the FORALL index variables doesn't appear in the
10025 assignment variable, then there could be a many-to-one
10026 assignment. Emit a warning rather than an error because the
10027 mask could be resolving this problem. */
10028 if (!find_forall_index (code
->expr1
, forall_index
, 0))
10029 gfc_warning (0, "The FORALL with index %qs is not used on the "
10030 "left side of the assignment at %L and so might "
10031 "cause multiple assignment to this object",
10032 var_expr
[n
]->symtree
->name
, &code
->expr1
->where
);
10038 /* Resolve WHERE statement in FORALL construct. */
10041 gfc_resolve_where_code_in_forall (gfc_code
*code
, int nvar
,
10042 gfc_expr
**var_expr
)
10047 cblock
= code
->block
;
10050 /* the assignment statement of a WHERE statement, or the first
10051 statement in where-body-construct of a WHERE construct */
10052 cnext
= cblock
->next
;
10057 /* WHERE assignment statement */
10059 gfc_resolve_assign_in_forall (cnext
, nvar
, var_expr
);
10062 /* WHERE operator assignment statement */
10063 case EXEC_ASSIGN_CALL
:
10064 resolve_call (cnext
);
10065 if (!cnext
->resolved_sym
->attr
.elemental
)
10066 gfc_error("Non-ELEMENTAL user-defined assignment in WHERE at %L",
10067 &cnext
->ext
.actual
->expr
->where
);
10070 /* WHERE or WHERE construct is part of a where-body-construct */
10072 gfc_resolve_where_code_in_forall (cnext
, nvar
, var_expr
);
10076 gfc_error ("Unsupported statement inside WHERE at %L",
10079 /* the next statement within the same where-body-construct */
10080 cnext
= cnext
->next
;
10082 /* the next masked-elsewhere-stmt, elsewhere-stmt, or end-where-stmt */
10083 cblock
= cblock
->block
;
10088 /* Traverse the FORALL body to check whether the following errors exist:
10089 1. For assignment, check if a many-to-one assignment happens.
10090 2. For WHERE statement, check the WHERE body to see if there is any
10091 many-to-one assignment. */
10094 gfc_resolve_forall_body (gfc_code
*code
, int nvar
, gfc_expr
**var_expr
)
10098 c
= code
->block
->next
;
10104 case EXEC_POINTER_ASSIGN
:
10105 gfc_resolve_assign_in_forall (c
, nvar
, var_expr
);
10108 case EXEC_ASSIGN_CALL
:
10112 /* Because the gfc_resolve_blocks() will handle the nested FORALL,
10113 there is no need to handle it here. */
10117 gfc_resolve_where_code_in_forall(c
, nvar
, var_expr
);
10122 /* The next statement in the FORALL body. */
10128 /* Counts the number of iterators needed inside a forall construct, including
10129 nested forall constructs. This is used to allocate the needed memory
10130 in gfc_resolve_forall. */
10133 gfc_count_forall_iterators (gfc_code
*code
)
10135 int max_iters
, sub_iters
, current_iters
;
10136 gfc_forall_iterator
*fa
;
10138 gcc_assert(code
->op
== EXEC_FORALL
);
10142 for (fa
= code
->ext
.forall_iterator
; fa
; fa
= fa
->next
)
10145 code
= code
->block
->next
;
10149 if (code
->op
== EXEC_FORALL
)
10151 sub_iters
= gfc_count_forall_iterators (code
);
10152 if (sub_iters
> max_iters
)
10153 max_iters
= sub_iters
;
10158 return current_iters
+ max_iters
;
10162 /* Given a FORALL construct, first resolve the FORALL iterator, then call
10163 gfc_resolve_forall_body to resolve the FORALL body. */
10166 gfc_resolve_forall (gfc_code
*code
, gfc_namespace
*ns
, int forall_save
)
10168 static gfc_expr
**var_expr
;
10169 static int total_var
= 0;
10170 static int nvar
= 0;
10171 int i
, old_nvar
, tmp
;
10172 gfc_forall_iterator
*fa
;
10176 if (!gfc_notify_std (GFC_STD_F2018_OBS
, "FORALL construct at %L", &code
->loc
))
10179 /* Start to resolve a FORALL construct */
10180 if (forall_save
== 0)
10182 /* Count the total number of FORALL indices in the nested FORALL
10183 construct in order to allocate the VAR_EXPR with proper size. */
10184 total_var
= gfc_count_forall_iterators (code
);
10186 /* Allocate VAR_EXPR with NUMBER_OF_FORALL_INDEX elements. */
10187 var_expr
= XCNEWVEC (gfc_expr
*, total_var
);
10190 /* The information about FORALL iterator, including FORALL indices start, end
10191 and stride. An outer FORALL indice cannot appear in start, end or stride. */
10192 for (fa
= code
->ext
.forall_iterator
; fa
; fa
= fa
->next
)
10194 /* Fortran 20008: C738 (R753). */
10195 if (fa
->var
->ref
&& fa
->var
->ref
->type
== REF_ARRAY
)
10197 gfc_error ("FORALL index-name at %L must be a scalar variable "
10198 "of type integer", &fa
->var
->where
);
10202 /* Check if any outer FORALL index name is the same as the current
10204 for (i
= 0; i
< nvar
; i
++)
10206 if (fa
->var
->symtree
->n
.sym
== var_expr
[i
]->symtree
->n
.sym
)
10207 gfc_error ("An outer FORALL construct already has an index "
10208 "with this name %L", &fa
->var
->where
);
10211 /* Record the current FORALL index. */
10212 var_expr
[nvar
] = gfc_copy_expr (fa
->var
);
10216 /* No memory leak. */
10217 gcc_assert (nvar
<= total_var
);
10220 /* Resolve the FORALL body. */
10221 gfc_resolve_forall_body (code
, nvar
, var_expr
);
10223 /* May call gfc_resolve_forall to resolve the inner FORALL loop. */
10224 gfc_resolve_blocks (code
->block
, ns
);
10228 /* Free only the VAR_EXPRs allocated in this frame. */
10229 for (i
= nvar
; i
< tmp
; i
++)
10230 gfc_free_expr (var_expr
[i
]);
10234 /* We are in the outermost FORALL construct. */
10235 gcc_assert (forall_save
== 0);
10237 /* VAR_EXPR is not needed any more. */
10244 /* Resolve a BLOCK construct statement. */
10247 resolve_block_construct (gfc_code
* code
)
10249 /* Resolve the BLOCK's namespace. */
10250 gfc_resolve (code
->ext
.block
.ns
);
10252 /* For an ASSOCIATE block, the associations (and their targets) are already
10253 resolved during resolve_symbol. */
10257 /* Resolve lists of blocks found in IF, SELECT CASE, WHERE, FORALL, GOTO and
10261 gfc_resolve_blocks (gfc_code
*b
, gfc_namespace
*ns
)
10265 for (; b
; b
= b
->block
)
10267 t
= gfc_resolve_expr (b
->expr1
);
10268 if (!gfc_resolve_expr (b
->expr2
))
10274 if (t
&& b
->expr1
!= NULL
10275 && (b
->expr1
->ts
.type
!= BT_LOGICAL
|| b
->expr1
->rank
!= 0))
10276 gfc_error ("IF clause at %L requires a scalar LOGICAL expression",
10282 && b
->expr1
!= NULL
10283 && (b
->expr1
->ts
.type
!= BT_LOGICAL
|| b
->expr1
->rank
== 0))
10284 gfc_error ("WHERE/ELSEWHERE clause at %L requires a LOGICAL array",
10289 resolve_branch (b
->label1
, b
);
10293 resolve_block_construct (b
);
10297 case EXEC_SELECT_TYPE
:
10300 case EXEC_DO_WHILE
:
10301 case EXEC_DO_CONCURRENT
:
10302 case EXEC_CRITICAL
:
10305 case EXEC_IOLENGTH
:
10309 case EXEC_OMP_ATOMIC
:
10310 case EXEC_OACC_ATOMIC
:
10312 gfc_omp_atomic_op aop
10313 = (gfc_omp_atomic_op
) (b
->ext
.omp_atomic
& GFC_OMP_ATOMIC_MASK
);
10315 /* Verify this before calling gfc_resolve_code, which might
10317 gcc_assert (b
->next
&& b
->next
->op
== EXEC_ASSIGN
);
10318 gcc_assert (((aop
!= GFC_OMP_ATOMIC_CAPTURE
)
10319 && b
->next
->next
== NULL
)
10320 || ((aop
== GFC_OMP_ATOMIC_CAPTURE
)
10321 && b
->next
->next
!= NULL
10322 && b
->next
->next
->op
== EXEC_ASSIGN
10323 && b
->next
->next
->next
== NULL
));
10327 case EXEC_OACC_PARALLEL_LOOP
:
10328 case EXEC_OACC_PARALLEL
:
10329 case EXEC_OACC_KERNELS_LOOP
:
10330 case EXEC_OACC_KERNELS
:
10331 case EXEC_OACC_DATA
:
10332 case EXEC_OACC_HOST_DATA
:
10333 case EXEC_OACC_LOOP
:
10334 case EXEC_OACC_UPDATE
:
10335 case EXEC_OACC_WAIT
:
10336 case EXEC_OACC_CACHE
:
10337 case EXEC_OACC_ENTER_DATA
:
10338 case EXEC_OACC_EXIT_DATA
:
10339 case EXEC_OACC_ROUTINE
:
10340 case EXEC_OMP_CRITICAL
:
10341 case EXEC_OMP_DISTRIBUTE
:
10342 case EXEC_OMP_DISTRIBUTE_PARALLEL_DO
:
10343 case EXEC_OMP_DISTRIBUTE_PARALLEL_DO_SIMD
:
10344 case EXEC_OMP_DISTRIBUTE_SIMD
:
10346 case EXEC_OMP_DO_SIMD
:
10347 case EXEC_OMP_MASTER
:
10348 case EXEC_OMP_ORDERED
:
10349 case EXEC_OMP_PARALLEL
:
10350 case EXEC_OMP_PARALLEL_DO
:
10351 case EXEC_OMP_PARALLEL_DO_SIMD
:
10352 case EXEC_OMP_PARALLEL_SECTIONS
:
10353 case EXEC_OMP_PARALLEL_WORKSHARE
:
10354 case EXEC_OMP_SECTIONS
:
10355 case EXEC_OMP_SIMD
:
10356 case EXEC_OMP_SINGLE
:
10357 case EXEC_OMP_TARGET
:
10358 case EXEC_OMP_TARGET_DATA
:
10359 case EXEC_OMP_TARGET_ENTER_DATA
:
10360 case EXEC_OMP_TARGET_EXIT_DATA
:
10361 case EXEC_OMP_TARGET_PARALLEL
:
10362 case EXEC_OMP_TARGET_PARALLEL_DO
:
10363 case EXEC_OMP_TARGET_PARALLEL_DO_SIMD
:
10364 case EXEC_OMP_TARGET_SIMD
:
10365 case EXEC_OMP_TARGET_TEAMS
:
10366 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE
:
10367 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO
:
10368 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
10369 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_SIMD
:
10370 case EXEC_OMP_TARGET_UPDATE
:
10371 case EXEC_OMP_TASK
:
10372 case EXEC_OMP_TASKGROUP
:
10373 case EXEC_OMP_TASKLOOP
:
10374 case EXEC_OMP_TASKLOOP_SIMD
:
10375 case EXEC_OMP_TASKWAIT
:
10376 case EXEC_OMP_TASKYIELD
:
10377 case EXEC_OMP_TEAMS
:
10378 case EXEC_OMP_TEAMS_DISTRIBUTE
:
10379 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO
:
10380 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
10381 case EXEC_OMP_TEAMS_DISTRIBUTE_SIMD
:
10382 case EXEC_OMP_WORKSHARE
:
10386 gfc_internal_error ("gfc_resolve_blocks(): Bad block type");
10389 gfc_resolve_code (b
->next
, ns
);
10394 /* Does everything to resolve an ordinary assignment. Returns true
10395 if this is an interface assignment. */
10397 resolve_ordinary_assign (gfc_code
*code
, gfc_namespace
*ns
)
10404 symbol_attribute attr
;
10406 if (gfc_extend_assign (code
, ns
))
10410 if (code
->op
== EXEC_ASSIGN_CALL
)
10412 lhs
= code
->ext
.actual
->expr
;
10413 rhsptr
= &code
->ext
.actual
->next
->expr
;
10417 gfc_actual_arglist
* args
;
10418 gfc_typebound_proc
* tbp
;
10420 gcc_assert (code
->op
== EXEC_COMPCALL
);
10422 args
= code
->expr1
->value
.compcall
.actual
;
10424 rhsptr
= &args
->next
->expr
;
10426 tbp
= code
->expr1
->value
.compcall
.tbp
;
10427 gcc_assert (!tbp
->is_generic
);
10430 /* Make a temporary rhs when there is a default initializer
10431 and rhs is the same symbol as the lhs. */
10432 if ((*rhsptr
)->expr_type
== EXPR_VARIABLE
10433 && (*rhsptr
)->symtree
->n
.sym
->ts
.type
== BT_DERIVED
10434 && gfc_has_default_initializer ((*rhsptr
)->symtree
->n
.sym
->ts
.u
.derived
)
10435 && (lhs
->symtree
->n
.sym
== (*rhsptr
)->symtree
->n
.sym
))
10436 *rhsptr
= gfc_get_parentheses (*rhsptr
);
10445 && !gfc_notify_std (GFC_STD_GNU
, "BOZ literal at %L outside "
10446 "a DATA statement and outside INT/REAL/DBLE/CMPLX",
10450 /* Handle the case of a BOZ literal on the RHS. */
10451 if (rhs
->is_boz
&& lhs
->ts
.type
!= BT_INTEGER
)
10454 if (warn_surprising
)
10455 gfc_warning (OPT_Wsurprising
,
10456 "BOZ literal at %L is bitwise transferred "
10457 "non-integer symbol %qs", &code
->loc
,
10458 lhs
->symtree
->n
.sym
->name
);
10460 if (!gfc_convert_boz (rhs
, &lhs
->ts
))
10462 if ((rc
= gfc_range_check (rhs
)) != ARITH_OK
)
10464 if (rc
== ARITH_UNDERFLOW
)
10465 gfc_error ("Arithmetic underflow of bit-wise transferred BOZ at %L"
10466 ". This check can be disabled with the option "
10467 "%<-fno-range-check%>", &rhs
->where
);
10468 else if (rc
== ARITH_OVERFLOW
)
10469 gfc_error ("Arithmetic overflow of bit-wise transferred BOZ at %L"
10470 ". This check can be disabled with the option "
10471 "%<-fno-range-check%>", &rhs
->where
);
10472 else if (rc
== ARITH_NAN
)
10473 gfc_error ("Arithmetic NaN of bit-wise transferred BOZ at %L"
10474 ". This check can be disabled with the option "
10475 "%<-fno-range-check%>", &rhs
->where
);
10480 if (lhs
->ts
.type
== BT_CHARACTER
10481 && warn_character_truncation
)
10483 HOST_WIDE_INT llen
= 0, rlen
= 0;
10484 if (lhs
->ts
.u
.cl
!= NULL
10485 && lhs
->ts
.u
.cl
->length
!= NULL
10486 && lhs
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
)
10487 llen
= gfc_mpz_get_hwi (lhs
->ts
.u
.cl
->length
->value
.integer
);
10489 if (rhs
->expr_type
== EXPR_CONSTANT
)
10490 rlen
= rhs
->value
.character
.length
;
10492 else if (rhs
->ts
.u
.cl
!= NULL
10493 && rhs
->ts
.u
.cl
->length
!= NULL
10494 && rhs
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
)
10495 rlen
= gfc_mpz_get_hwi (rhs
->ts
.u
.cl
->length
->value
.integer
);
10497 if (rlen
&& llen
&& rlen
> llen
)
10498 gfc_warning_now (OPT_Wcharacter_truncation
,
10499 "CHARACTER expression will be truncated "
10500 "in assignment (%ld/%ld) at %L",
10501 (long) llen
, (long) rlen
, &code
->loc
);
10504 /* Ensure that a vector index expression for the lvalue is evaluated
10505 to a temporary if the lvalue symbol is referenced in it. */
10508 for (ref
= lhs
->ref
; ref
; ref
= ref
->next
)
10509 if (ref
->type
== REF_ARRAY
)
10511 for (n
= 0; n
< ref
->u
.ar
.dimen
; n
++)
10512 if (ref
->u
.ar
.dimen_type
[n
] == DIMEN_VECTOR
10513 && gfc_find_sym_in_expr (lhs
->symtree
->n
.sym
,
10514 ref
->u
.ar
.start
[n
]))
10516 = gfc_get_parentheses (ref
->u
.ar
.start
[n
]);
10520 if (gfc_pure (NULL
))
10522 if (lhs
->ts
.type
== BT_DERIVED
10523 && lhs
->expr_type
== EXPR_VARIABLE
10524 && lhs
->ts
.u
.derived
->attr
.pointer_comp
10525 && rhs
->expr_type
== EXPR_VARIABLE
10526 && (gfc_impure_variable (rhs
->symtree
->n
.sym
)
10527 || gfc_is_coindexed (rhs
)))
10529 /* F2008, C1283. */
10530 if (gfc_is_coindexed (rhs
))
10531 gfc_error ("Coindexed expression at %L is assigned to "
10532 "a derived type variable with a POINTER "
10533 "component in a PURE procedure",
10536 gfc_error ("The impure variable at %L is assigned to "
10537 "a derived type variable with a POINTER "
10538 "component in a PURE procedure (12.6)",
10543 /* Fortran 2008, C1283. */
10544 if (gfc_is_coindexed (lhs
))
10546 gfc_error ("Assignment to coindexed variable at %L in a PURE "
10547 "procedure", &rhs
->where
);
10552 if (gfc_implicit_pure (NULL
))
10554 if (lhs
->expr_type
== EXPR_VARIABLE
10555 && lhs
->symtree
->n
.sym
!= gfc_current_ns
->proc_name
10556 && lhs
->symtree
->n
.sym
->ns
!= gfc_current_ns
)
10557 gfc_unset_implicit_pure (NULL
);
10559 if (lhs
->ts
.type
== BT_DERIVED
10560 && lhs
->expr_type
== EXPR_VARIABLE
10561 && lhs
->ts
.u
.derived
->attr
.pointer_comp
10562 && rhs
->expr_type
== EXPR_VARIABLE
10563 && (gfc_impure_variable (rhs
->symtree
->n
.sym
)
10564 || gfc_is_coindexed (rhs
)))
10565 gfc_unset_implicit_pure (NULL
);
10567 /* Fortran 2008, C1283. */
10568 if (gfc_is_coindexed (lhs
))
10569 gfc_unset_implicit_pure (NULL
);
10572 /* F2008, 7.2.1.2. */
10573 attr
= gfc_expr_attr (lhs
);
10574 if (lhs
->ts
.type
== BT_CLASS
&& attr
.allocatable
)
10576 if (attr
.codimension
)
10578 gfc_error ("Assignment to polymorphic coarray at %L is not "
10579 "permitted", &lhs
->where
);
10582 if (!gfc_notify_std (GFC_STD_F2008
, "Assignment to an allocatable "
10583 "polymorphic variable at %L", &lhs
->where
))
10585 if (!flag_realloc_lhs
)
10587 gfc_error ("Assignment to an allocatable polymorphic variable at %L "
10588 "requires %<-frealloc-lhs%>", &lhs
->where
);
10592 else if (lhs
->ts
.type
== BT_CLASS
)
10594 gfc_error ("Nonallocatable variable must not be polymorphic in intrinsic "
10595 "assignment at %L - check that there is a matching specific "
10596 "subroutine for '=' operator", &lhs
->where
);
10600 bool lhs_coindexed
= gfc_is_coindexed (lhs
);
10602 /* F2008, Section 7.2.1.2. */
10603 if (lhs_coindexed
&& gfc_has_ultimate_allocatable (lhs
))
10605 gfc_error ("Coindexed variable must not have an allocatable ultimate "
10606 "component in assignment at %L", &lhs
->where
);
10610 /* Assign the 'data' of a class object to a derived type. */
10611 if (lhs
->ts
.type
== BT_DERIVED
10612 && rhs
->ts
.type
== BT_CLASS
10613 && rhs
->expr_type
!= EXPR_ARRAY
)
10614 gfc_add_data_component (rhs
);
10616 /* Make sure there is a vtable and, in particular, a _copy for the
10618 if (UNLIMITED_POLY (lhs
) && lhs
->rank
&& rhs
->ts
.type
!= BT_CLASS
)
10619 gfc_find_vtab (&rhs
->ts
);
10621 bool caf_convert_to_send
= flag_coarray
== GFC_FCOARRAY_LIB
10623 || (code
->expr2
->expr_type
== EXPR_FUNCTION
10624 && code
->expr2
->value
.function
.isym
10625 && code
->expr2
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
10626 && (code
->expr1
->rank
== 0 || code
->expr2
->rank
!= 0)
10627 && !gfc_expr_attr (rhs
).allocatable
10628 && !gfc_has_vector_subscript (rhs
)));
10630 gfc_check_assign (lhs
, rhs
, 1, !caf_convert_to_send
);
10632 /* Insert a GFC_ISYM_CAF_SEND intrinsic, when the LHS is a coindexed variable.
10633 Additionally, insert this code when the RHS is a CAF as we then use the
10634 GFC_ISYM_CAF_SEND intrinsic just to avoid a temporary; but do not do so if
10635 the LHS is (re)allocatable or has a vector subscript. If the LHS is a
10636 noncoindexed array and the RHS is a coindexed scalar, use the normal code
10638 if (caf_convert_to_send
)
10640 if (code
->expr2
->expr_type
== EXPR_FUNCTION
10641 && code
->expr2
->value
.function
.isym
10642 && code
->expr2
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
)
10643 remove_caf_get_intrinsic (code
->expr2
);
10644 code
->op
= EXEC_CALL
;
10645 gfc_get_sym_tree (GFC_PREFIX ("caf_send"), ns
, &code
->symtree
, true);
10646 code
->resolved_sym
= code
->symtree
->n
.sym
;
10647 code
->resolved_sym
->attr
.flavor
= FL_PROCEDURE
;
10648 code
->resolved_sym
->attr
.intrinsic
= 1;
10649 code
->resolved_sym
->attr
.subroutine
= 1;
10650 code
->resolved_isym
= gfc_intrinsic_subroutine_by_id (GFC_ISYM_CAF_SEND
);
10651 gfc_commit_symbol (code
->resolved_sym
);
10652 code
->ext
.actual
= gfc_get_actual_arglist ();
10653 code
->ext
.actual
->expr
= lhs
;
10654 code
->ext
.actual
->next
= gfc_get_actual_arglist ();
10655 code
->ext
.actual
->next
->expr
= rhs
;
10656 code
->expr1
= NULL
;
10657 code
->expr2
= NULL
;
10664 /* Add a component reference onto an expression. */
10667 add_comp_ref (gfc_expr
*e
, gfc_component
*c
)
10672 ref
= &((*ref
)->next
);
10673 *ref
= gfc_get_ref ();
10674 (*ref
)->type
= REF_COMPONENT
;
10675 (*ref
)->u
.c
.sym
= e
->ts
.u
.derived
;
10676 (*ref
)->u
.c
.component
= c
;
10679 /* Add a full array ref, as necessary. */
10682 gfc_add_full_array_ref (e
, c
->as
);
10683 e
->rank
= c
->as
->rank
;
10688 /* Build an assignment. Keep the argument 'op' for future use, so that
10689 pointer assignments can be made. */
10692 build_assignment (gfc_exec_op op
, gfc_expr
*expr1
, gfc_expr
*expr2
,
10693 gfc_component
*comp1
, gfc_component
*comp2
, locus loc
)
10695 gfc_code
*this_code
;
10697 this_code
= gfc_get_code (op
);
10698 this_code
->next
= NULL
;
10699 this_code
->expr1
= gfc_copy_expr (expr1
);
10700 this_code
->expr2
= gfc_copy_expr (expr2
);
10701 this_code
->loc
= loc
;
10702 if (comp1
&& comp2
)
10704 add_comp_ref (this_code
->expr1
, comp1
);
10705 add_comp_ref (this_code
->expr2
, comp2
);
10712 /* Makes a temporary variable expression based on the characteristics of
10713 a given variable expression. */
10716 get_temp_from_expr (gfc_expr
*e
, gfc_namespace
*ns
)
10718 static int serial
= 0;
10719 char name
[GFC_MAX_SYMBOL_LEN
];
10721 gfc_array_spec
*as
;
10722 gfc_array_ref
*aref
;
10725 sprintf (name
, GFC_PREFIX("DA%d"), serial
++);
10726 gfc_get_sym_tree (name
, ns
, &tmp
, false);
10727 gfc_add_type (tmp
->n
.sym
, &e
->ts
, NULL
);
10729 if (e
->expr_type
== EXPR_CONSTANT
&& e
->ts
.type
== BT_CHARACTER
)
10730 tmp
->n
.sym
->ts
.u
.cl
->length
= gfc_get_int_expr (gfc_charlen_int_kind
,
10732 e
->value
.character
.length
);
10738 /* Obtain the arrayspec for the temporary. */
10739 if (e
->rank
&& e
->expr_type
!= EXPR_ARRAY
10740 && e
->expr_type
!= EXPR_FUNCTION
10741 && e
->expr_type
!= EXPR_OP
)
10743 aref
= gfc_find_array_ref (e
);
10744 if (e
->expr_type
== EXPR_VARIABLE
10745 && e
->symtree
->n
.sym
->as
== aref
->as
)
10749 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
10750 if (ref
->type
== REF_COMPONENT
10751 && ref
->u
.c
.component
->as
== aref
->as
)
10759 /* Add the attributes and the arrayspec to the temporary. */
10760 tmp
->n
.sym
->attr
= gfc_expr_attr (e
);
10761 tmp
->n
.sym
->attr
.function
= 0;
10762 tmp
->n
.sym
->attr
.result
= 0;
10763 tmp
->n
.sym
->attr
.flavor
= FL_VARIABLE
;
10764 tmp
->n
.sym
->attr
.dummy
= 0;
10765 tmp
->n
.sym
->attr
.intent
= INTENT_UNKNOWN
;
10769 tmp
->n
.sym
->as
= gfc_copy_array_spec (as
);
10772 if (as
->type
== AS_DEFERRED
)
10773 tmp
->n
.sym
->attr
.allocatable
= 1;
10775 else if (e
->rank
&& (e
->expr_type
== EXPR_ARRAY
10776 || e
->expr_type
== EXPR_FUNCTION
10777 || e
->expr_type
== EXPR_OP
))
10779 tmp
->n
.sym
->as
= gfc_get_array_spec ();
10780 tmp
->n
.sym
->as
->type
= AS_DEFERRED
;
10781 tmp
->n
.sym
->as
->rank
= e
->rank
;
10782 tmp
->n
.sym
->attr
.allocatable
= 1;
10783 tmp
->n
.sym
->attr
.dimension
= 1;
10786 tmp
->n
.sym
->attr
.dimension
= 0;
10788 gfc_set_sym_referenced (tmp
->n
.sym
);
10789 gfc_commit_symbol (tmp
->n
.sym
);
10790 e
= gfc_lval_expr_from_sym (tmp
->n
.sym
);
10792 /* Should the lhs be a section, use its array ref for the
10793 temporary expression. */
10794 if (aref
&& aref
->type
!= AR_FULL
)
10796 gfc_free_ref_list (e
->ref
);
10797 e
->ref
= gfc_copy_ref (ref
);
10803 /* Add one line of code to the code chain, making sure that 'head' and
10804 'tail' are appropriately updated. */
10807 add_code_to_chain (gfc_code
**this_code
, gfc_code
**head
, gfc_code
**tail
)
10809 gcc_assert (this_code
);
10811 *head
= *tail
= *this_code
;
10813 *tail
= gfc_append_code (*tail
, *this_code
);
10818 /* Counts the potential number of part array references that would
10819 result from resolution of typebound defined assignments. */
10822 nonscalar_typebound_assign (gfc_symbol
*derived
, int depth
)
10825 int c_depth
= 0, t_depth
;
10827 for (c
= derived
->components
; c
; c
= c
->next
)
10829 if ((!gfc_bt_struct (c
->ts
.type
)
10831 || c
->attr
.allocatable
10832 || c
->attr
.proc_pointer_comp
10833 || c
->attr
.class_pointer
10834 || c
->attr
.proc_pointer
)
10835 && !c
->attr
.defined_assign_comp
)
10838 if (c
->as
&& c_depth
== 0)
10841 if (c
->ts
.u
.derived
->attr
.defined_assign_comp
)
10842 t_depth
= nonscalar_typebound_assign (c
->ts
.u
.derived
,
10847 c_depth
= t_depth
> c_depth
? t_depth
: c_depth
;
10849 return depth
+ c_depth
;
10853 /* Implement 7.2.1.3 of the F08 standard:
10854 "An intrinsic assignment where the variable is of derived type is
10855 performed as if each component of the variable were assigned from the
10856 corresponding component of expr using pointer assignment (7.2.2) for
10857 each pointer component, defined assignment for each nonpointer
10858 nonallocatable component of a type that has a type-bound defined
10859 assignment consistent with the component, intrinsic assignment for
10860 each other nonpointer nonallocatable component, ..."
10862 The pointer assignments are taken care of by the intrinsic
10863 assignment of the structure itself. This function recursively adds
10864 defined assignments where required. The recursion is accomplished
10865 by calling gfc_resolve_code.
10867 When the lhs in a defined assignment has intent INOUT, we need a
10868 temporary for the lhs. In pseudo-code:
10870 ! Only call function lhs once.
10871 if (lhs is not a constant or an variable)
10874 ! Do the intrinsic assignment
10876 ! Now do the defined assignments
10877 do over components with typebound defined assignment [%cmp]
10878 #if one component's assignment procedure is INOUT
10880 #if expr2 non-variable
10886 t1%cmp {defined=} expr2%cmp
10892 expr1%cmp {defined=} expr2%cmp
10896 /* The temporary assignments have to be put on top of the additional
10897 code to avoid the result being changed by the intrinsic assignment.
10899 static int component_assignment_level
= 0;
10900 static gfc_code
*tmp_head
= NULL
, *tmp_tail
= NULL
;
10903 generate_component_assignments (gfc_code
**code
, gfc_namespace
*ns
)
10905 gfc_component
*comp1
, *comp2
;
10906 gfc_code
*this_code
= NULL
, *head
= NULL
, *tail
= NULL
;
10908 int error_count
, depth
;
10910 gfc_get_errors (NULL
, &error_count
);
10912 /* Filter out continuing processing after an error. */
10914 || (*code
)->expr1
->ts
.type
!= BT_DERIVED
10915 || (*code
)->expr2
->ts
.type
!= BT_DERIVED
)
10918 /* TODO: Handle more than one part array reference in assignments. */
10919 depth
= nonscalar_typebound_assign ((*code
)->expr1
->ts
.u
.derived
,
10920 (*code
)->expr1
->rank
? 1 : 0);
10923 gfc_warning (0, "TODO: type-bound defined assignment(s) at %L not "
10924 "done because multiple part array references would "
10925 "occur in intermediate expressions.", &(*code
)->loc
);
10929 component_assignment_level
++;
10931 /* Create a temporary so that functions get called only once. */
10932 if ((*code
)->expr2
->expr_type
!= EXPR_VARIABLE
10933 && (*code
)->expr2
->expr_type
!= EXPR_CONSTANT
)
10935 gfc_expr
*tmp_expr
;
10937 /* Assign the rhs to the temporary. */
10938 tmp_expr
= get_temp_from_expr ((*code
)->expr1
, ns
);
10939 this_code
= build_assignment (EXEC_ASSIGN
,
10940 tmp_expr
, (*code
)->expr2
,
10941 NULL
, NULL
, (*code
)->loc
);
10942 /* Add the code and substitute the rhs expression. */
10943 add_code_to_chain (&this_code
, &tmp_head
, &tmp_tail
);
10944 gfc_free_expr ((*code
)->expr2
);
10945 (*code
)->expr2
= tmp_expr
;
10948 /* Do the intrinsic assignment. This is not needed if the lhs is one
10949 of the temporaries generated here, since the intrinsic assignment
10950 to the final result already does this. */
10951 if ((*code
)->expr1
->symtree
->n
.sym
->name
[2] != '@')
10953 this_code
= build_assignment (EXEC_ASSIGN
,
10954 (*code
)->expr1
, (*code
)->expr2
,
10955 NULL
, NULL
, (*code
)->loc
);
10956 add_code_to_chain (&this_code
, &head
, &tail
);
10959 comp1
= (*code
)->expr1
->ts
.u
.derived
->components
;
10960 comp2
= (*code
)->expr2
->ts
.u
.derived
->components
;
10963 for (; comp1
; comp1
= comp1
->next
, comp2
= comp2
->next
)
10965 bool inout
= false;
10967 /* The intrinsic assignment does the right thing for pointers
10968 of all kinds and allocatable components. */
10969 if (!gfc_bt_struct (comp1
->ts
.type
)
10970 || comp1
->attr
.pointer
10971 || comp1
->attr
.allocatable
10972 || comp1
->attr
.proc_pointer_comp
10973 || comp1
->attr
.class_pointer
10974 || comp1
->attr
.proc_pointer
)
10977 /* Make an assigment for this component. */
10978 this_code
= build_assignment (EXEC_ASSIGN
,
10979 (*code
)->expr1
, (*code
)->expr2
,
10980 comp1
, comp2
, (*code
)->loc
);
10982 /* Convert the assignment if there is a defined assignment for
10983 this type. Otherwise, using the call from gfc_resolve_code,
10984 recurse into its components. */
10985 gfc_resolve_code (this_code
, ns
);
10987 if (this_code
->op
== EXEC_ASSIGN_CALL
)
10989 gfc_formal_arglist
*dummy_args
;
10991 /* Check that there is a typebound defined assignment. If not,
10992 then this must be a module defined assignment. We cannot
10993 use the defined_assign_comp attribute here because it must
10994 be this derived type that has the defined assignment and not
10996 if (!(comp1
->ts
.u
.derived
->f2k_derived
10997 && comp1
->ts
.u
.derived
->f2k_derived
10998 ->tb_op
[INTRINSIC_ASSIGN
]))
11000 gfc_free_statements (this_code
);
11005 /* If the first argument of the subroutine has intent INOUT
11006 a temporary must be generated and used instead. */
11007 rsym
= this_code
->resolved_sym
;
11008 dummy_args
= gfc_sym_get_dummy_args (rsym
);
11010 && dummy_args
->sym
->attr
.intent
== INTENT_INOUT
)
11012 gfc_code
*temp_code
;
11015 /* Build the temporary required for the assignment and put
11016 it at the head of the generated code. */
11019 t1
= get_temp_from_expr ((*code
)->expr1
, ns
);
11020 temp_code
= build_assignment (EXEC_ASSIGN
,
11021 t1
, (*code
)->expr1
,
11022 NULL
, NULL
, (*code
)->loc
);
11024 /* For allocatable LHS, check whether it is allocated. Note
11025 that allocatable components with defined assignment are
11026 not yet support. See PR 57696. */
11027 if ((*code
)->expr1
->symtree
->n
.sym
->attr
.allocatable
)
11031 gfc_lval_expr_from_sym ((*code
)->expr1
->symtree
->n
.sym
);
11032 block
= gfc_get_code (EXEC_IF
);
11033 block
->block
= gfc_get_code (EXEC_IF
);
11034 block
->block
->expr1
11035 = gfc_build_intrinsic_call (ns
,
11036 GFC_ISYM_ALLOCATED
, "allocated",
11037 (*code
)->loc
, 1, e
);
11038 block
->block
->next
= temp_code
;
11041 add_code_to_chain (&temp_code
, &tmp_head
, &tmp_tail
);
11044 /* Replace the first actual arg with the component of the
11046 gfc_free_expr (this_code
->ext
.actual
->expr
);
11047 this_code
->ext
.actual
->expr
= gfc_copy_expr (t1
);
11048 add_comp_ref (this_code
->ext
.actual
->expr
, comp1
);
11050 /* If the LHS variable is allocatable and wasn't allocated and
11051 the temporary is allocatable, pointer assign the address of
11052 the freshly allocated LHS to the temporary. */
11053 if ((*code
)->expr1
->symtree
->n
.sym
->attr
.allocatable
11054 && gfc_expr_attr ((*code
)->expr1
).allocatable
)
11059 cond
= gfc_get_expr ();
11060 cond
->ts
.type
= BT_LOGICAL
;
11061 cond
->ts
.kind
= gfc_default_logical_kind
;
11062 cond
->expr_type
= EXPR_OP
;
11063 cond
->where
= (*code
)->loc
;
11064 cond
->value
.op
.op
= INTRINSIC_NOT
;
11065 cond
->value
.op
.op1
= gfc_build_intrinsic_call (ns
,
11066 GFC_ISYM_ALLOCATED
, "allocated",
11067 (*code
)->loc
, 1, gfc_copy_expr (t1
));
11068 block
= gfc_get_code (EXEC_IF
);
11069 block
->block
= gfc_get_code (EXEC_IF
);
11070 block
->block
->expr1
= cond
;
11071 block
->block
->next
= build_assignment (EXEC_POINTER_ASSIGN
,
11072 t1
, (*code
)->expr1
,
11073 NULL
, NULL
, (*code
)->loc
);
11074 add_code_to_chain (&block
, &head
, &tail
);
11078 else if (this_code
->op
== EXEC_ASSIGN
&& !this_code
->next
)
11080 /* Don't add intrinsic assignments since they are already
11081 effected by the intrinsic assignment of the structure. */
11082 gfc_free_statements (this_code
);
11087 add_code_to_chain (&this_code
, &head
, &tail
);
11091 /* Transfer the value to the final result. */
11092 this_code
= build_assignment (EXEC_ASSIGN
,
11093 (*code
)->expr1
, t1
,
11094 comp1
, comp2
, (*code
)->loc
);
11095 add_code_to_chain (&this_code
, &head
, &tail
);
11099 /* Put the temporary assignments at the top of the generated code. */
11100 if (tmp_head
&& component_assignment_level
== 1)
11102 gfc_append_code (tmp_head
, head
);
11104 tmp_head
= tmp_tail
= NULL
;
11107 // If we did a pointer assignment - thus, we need to ensure that the LHS is
11108 // not accidentally deallocated. Hence, nullify t1.
11109 if (t1
&& (*code
)->expr1
->symtree
->n
.sym
->attr
.allocatable
11110 && gfc_expr_attr ((*code
)->expr1
).allocatable
)
11116 e
= gfc_lval_expr_from_sym ((*code
)->expr1
->symtree
->n
.sym
);
11117 cond
= gfc_build_intrinsic_call (ns
, GFC_ISYM_ASSOCIATED
, "associated",
11118 (*code
)->loc
, 2, gfc_copy_expr (t1
), e
);
11119 block
= gfc_get_code (EXEC_IF
);
11120 block
->block
= gfc_get_code (EXEC_IF
);
11121 block
->block
->expr1
= cond
;
11122 block
->block
->next
= build_assignment (EXEC_POINTER_ASSIGN
,
11123 t1
, gfc_get_null_expr (&(*code
)->loc
),
11124 NULL
, NULL
, (*code
)->loc
);
11125 gfc_append_code (tail
, block
);
11129 /* Now attach the remaining code chain to the input code. Step on
11130 to the end of the new code since resolution is complete. */
11131 gcc_assert ((*code
)->op
== EXEC_ASSIGN
);
11132 tail
->next
= (*code
)->next
;
11133 /* Overwrite 'code' because this would place the intrinsic assignment
11134 before the temporary for the lhs is created. */
11135 gfc_free_expr ((*code
)->expr1
);
11136 gfc_free_expr ((*code
)->expr2
);
11142 component_assignment_level
--;
11146 /* F2008: Pointer function assignments are of the form:
11147 ptr_fcn (args) = expr
11148 This function breaks these assignments into two statements:
11149 temporary_pointer => ptr_fcn(args)
11150 temporary_pointer = expr */
11153 resolve_ptr_fcn_assign (gfc_code
**code
, gfc_namespace
*ns
)
11155 gfc_expr
*tmp_ptr_expr
;
11156 gfc_code
*this_code
;
11157 gfc_component
*comp
;
11160 if ((*code
)->expr1
->expr_type
!= EXPR_FUNCTION
)
11163 /* Even if standard does not support this feature, continue to build
11164 the two statements to avoid upsetting frontend_passes.c. */
11165 gfc_notify_std (GFC_STD_F2008
, "Pointer procedure assignment at "
11166 "%L", &(*code
)->loc
);
11168 comp
= gfc_get_proc_ptr_comp ((*code
)->expr1
);
11171 s
= comp
->ts
.interface
;
11173 s
= (*code
)->expr1
->symtree
->n
.sym
;
11175 if (s
== NULL
|| !s
->result
->attr
.pointer
)
11177 gfc_error ("The function result on the lhs of the assignment at "
11178 "%L must have the pointer attribute.",
11179 &(*code
)->expr1
->where
);
11180 (*code
)->op
= EXEC_NOP
;
11184 tmp_ptr_expr
= get_temp_from_expr ((*code
)->expr2
, ns
);
11186 /* get_temp_from_expression is set up for ordinary assignments. To that
11187 end, where array bounds are not known, arrays are made allocatable.
11188 Change the temporary to a pointer here. */
11189 tmp_ptr_expr
->symtree
->n
.sym
->attr
.pointer
= 1;
11190 tmp_ptr_expr
->symtree
->n
.sym
->attr
.allocatable
= 0;
11191 tmp_ptr_expr
->where
= (*code
)->loc
;
11193 this_code
= build_assignment (EXEC_ASSIGN
,
11194 tmp_ptr_expr
, (*code
)->expr2
,
11195 NULL
, NULL
, (*code
)->loc
);
11196 this_code
->next
= (*code
)->next
;
11197 (*code
)->next
= this_code
;
11198 (*code
)->op
= EXEC_POINTER_ASSIGN
;
11199 (*code
)->expr2
= (*code
)->expr1
;
11200 (*code
)->expr1
= tmp_ptr_expr
;
11206 /* Deferred character length assignments from an operator expression
11207 require a temporary because the character length of the lhs can
11208 change in the course of the assignment. */
11211 deferred_op_assign (gfc_code
**code
, gfc_namespace
*ns
)
11213 gfc_expr
*tmp_expr
;
11214 gfc_code
*this_code
;
11216 if (!((*code
)->expr1
->ts
.type
== BT_CHARACTER
11217 && (*code
)->expr1
->ts
.deferred
&& (*code
)->expr1
->rank
11218 && (*code
)->expr2
->expr_type
== EXPR_OP
))
11221 if (!gfc_check_dependency ((*code
)->expr1
, (*code
)->expr2
, 1))
11224 if (gfc_expr_attr ((*code
)->expr1
).pointer
)
11227 tmp_expr
= get_temp_from_expr ((*code
)->expr1
, ns
);
11228 tmp_expr
->where
= (*code
)->loc
;
11230 /* A new charlen is required to ensure that the variable string
11231 length is different to that of the original lhs. */
11232 tmp_expr
->ts
.u
.cl
= gfc_get_charlen();
11233 tmp_expr
->symtree
->n
.sym
->ts
.u
.cl
= tmp_expr
->ts
.u
.cl
;
11234 tmp_expr
->ts
.u
.cl
->next
= (*code
)->expr2
->ts
.u
.cl
->next
;
11235 (*code
)->expr2
->ts
.u
.cl
->next
= tmp_expr
->ts
.u
.cl
;
11237 tmp_expr
->symtree
->n
.sym
->ts
.deferred
= 1;
11239 this_code
= build_assignment (EXEC_ASSIGN
,
11241 gfc_copy_expr (tmp_expr
),
11242 NULL
, NULL
, (*code
)->loc
);
11244 (*code
)->expr1
= tmp_expr
;
11246 this_code
->next
= (*code
)->next
;
11247 (*code
)->next
= this_code
;
11253 /* Given a block of code, recursively resolve everything pointed to by this
11257 gfc_resolve_code (gfc_code
*code
, gfc_namespace
*ns
)
11259 int omp_workshare_save
;
11260 int forall_save
, do_concurrent_save
;
11264 frame
.prev
= cs_base
;
11268 find_reachable_labels (code
);
11270 for (; code
; code
= code
->next
)
11272 frame
.current
= code
;
11273 forall_save
= forall_flag
;
11274 do_concurrent_save
= gfc_do_concurrent_flag
;
11276 if (code
->op
== EXEC_FORALL
)
11279 gfc_resolve_forall (code
, ns
, forall_save
);
11282 else if (code
->block
)
11284 omp_workshare_save
= -1;
11287 case EXEC_OACC_PARALLEL_LOOP
:
11288 case EXEC_OACC_PARALLEL
:
11289 case EXEC_OACC_KERNELS_LOOP
:
11290 case EXEC_OACC_KERNELS
:
11291 case EXEC_OACC_DATA
:
11292 case EXEC_OACC_HOST_DATA
:
11293 case EXEC_OACC_LOOP
:
11294 gfc_resolve_oacc_blocks (code
, ns
);
11296 case EXEC_OMP_PARALLEL_WORKSHARE
:
11297 omp_workshare_save
= omp_workshare_flag
;
11298 omp_workshare_flag
= 1;
11299 gfc_resolve_omp_parallel_blocks (code
, ns
);
11301 case EXEC_OMP_PARALLEL
:
11302 case EXEC_OMP_PARALLEL_DO
:
11303 case EXEC_OMP_PARALLEL_DO_SIMD
:
11304 case EXEC_OMP_PARALLEL_SECTIONS
:
11305 case EXEC_OMP_TARGET_PARALLEL
:
11306 case EXEC_OMP_TARGET_PARALLEL_DO
:
11307 case EXEC_OMP_TARGET_PARALLEL_DO_SIMD
:
11308 case EXEC_OMP_TARGET_TEAMS
:
11309 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE
:
11310 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO
:
11311 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
11312 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_SIMD
:
11313 case EXEC_OMP_TASK
:
11314 case EXEC_OMP_TASKLOOP
:
11315 case EXEC_OMP_TASKLOOP_SIMD
:
11316 case EXEC_OMP_TEAMS
:
11317 case EXEC_OMP_TEAMS_DISTRIBUTE
:
11318 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO
:
11319 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
11320 case EXEC_OMP_TEAMS_DISTRIBUTE_SIMD
:
11321 omp_workshare_save
= omp_workshare_flag
;
11322 omp_workshare_flag
= 0;
11323 gfc_resolve_omp_parallel_blocks (code
, ns
);
11325 case EXEC_OMP_DISTRIBUTE
:
11326 case EXEC_OMP_DISTRIBUTE_SIMD
:
11328 case EXEC_OMP_DO_SIMD
:
11329 case EXEC_OMP_SIMD
:
11330 case EXEC_OMP_TARGET_SIMD
:
11331 gfc_resolve_omp_do_blocks (code
, ns
);
11333 case EXEC_SELECT_TYPE
:
11334 /* Blocks are handled in resolve_select_type because we have
11335 to transform the SELECT TYPE into ASSOCIATE first. */
11337 case EXEC_DO_CONCURRENT
:
11338 gfc_do_concurrent_flag
= 1;
11339 gfc_resolve_blocks (code
->block
, ns
);
11340 gfc_do_concurrent_flag
= 2;
11342 case EXEC_OMP_WORKSHARE
:
11343 omp_workshare_save
= omp_workshare_flag
;
11344 omp_workshare_flag
= 1;
11347 gfc_resolve_blocks (code
->block
, ns
);
11351 if (omp_workshare_save
!= -1)
11352 omp_workshare_flag
= omp_workshare_save
;
11356 if (code
->op
!= EXEC_COMPCALL
&& code
->op
!= EXEC_CALL_PPC
)
11357 t
= gfc_resolve_expr (code
->expr1
);
11358 forall_flag
= forall_save
;
11359 gfc_do_concurrent_flag
= do_concurrent_save
;
11361 if (!gfc_resolve_expr (code
->expr2
))
11364 if (code
->op
== EXEC_ALLOCATE
11365 && !gfc_resolve_expr (code
->expr3
))
11371 case EXEC_END_BLOCK
:
11372 case EXEC_END_NESTED_BLOCK
:
11376 case EXEC_ERROR_STOP
:
11378 case EXEC_CONTINUE
:
11380 case EXEC_ASSIGN_CALL
:
11383 case EXEC_CRITICAL
:
11384 resolve_critical (code
);
11387 case EXEC_SYNC_ALL
:
11388 case EXEC_SYNC_IMAGES
:
11389 case EXEC_SYNC_MEMORY
:
11390 resolve_sync (code
);
11395 case EXEC_EVENT_POST
:
11396 case EXEC_EVENT_WAIT
:
11397 resolve_lock_unlock_event (code
);
11400 case EXEC_FAIL_IMAGE
:
11401 case EXEC_FORM_TEAM
:
11402 case EXEC_CHANGE_TEAM
:
11403 case EXEC_END_TEAM
:
11404 case EXEC_SYNC_TEAM
:
11408 /* Keep track of which entry we are up to. */
11409 current_entry_id
= code
->ext
.entry
->id
;
11413 resolve_where (code
, NULL
);
11417 if (code
->expr1
!= NULL
)
11419 if (code
->expr1
->ts
.type
!= BT_INTEGER
)
11420 gfc_error ("ASSIGNED GOTO statement at %L requires an "
11421 "INTEGER variable", &code
->expr1
->where
);
11422 else if (code
->expr1
->symtree
->n
.sym
->attr
.assign
!= 1)
11423 gfc_error ("Variable %qs has not been assigned a target "
11424 "label at %L", code
->expr1
->symtree
->n
.sym
->name
,
11425 &code
->expr1
->where
);
11428 resolve_branch (code
->label1
, code
);
11432 if (code
->expr1
!= NULL
11433 && (code
->expr1
->ts
.type
!= BT_INTEGER
|| code
->expr1
->rank
))
11434 gfc_error ("Alternate RETURN statement at %L requires a SCALAR-"
11435 "INTEGER return specifier", &code
->expr1
->where
);
11438 case EXEC_INIT_ASSIGN
:
11439 case EXEC_END_PROCEDURE
:
11446 /* Remove a GFC_ISYM_CAF_GET inserted for a coindexed variable on
11448 if (code
->expr1
->expr_type
== EXPR_FUNCTION
11449 && code
->expr1
->value
.function
.isym
11450 && code
->expr1
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
)
11451 remove_caf_get_intrinsic (code
->expr1
);
11453 /* If this is a pointer function in an lvalue variable context,
11454 the new code will have to be resolved afresh. This is also the
11455 case with an error, where the code is transformed into NOP to
11456 prevent ICEs downstream. */
11457 if (resolve_ptr_fcn_assign (&code
, ns
)
11458 || code
->op
== EXEC_NOP
)
11461 if (!gfc_check_vardef_context (code
->expr1
, false, false, false,
11465 if (resolve_ordinary_assign (code
, ns
))
11467 if (code
->op
== EXEC_COMPCALL
)
11473 /* Check for dependencies in deferred character length array
11474 assignments and generate a temporary, if necessary. */
11475 if (code
->op
== EXEC_ASSIGN
&& deferred_op_assign (&code
, ns
))
11478 /* F03 7.4.1.3 for non-allocatable, non-pointer components. */
11479 if (code
->op
!= EXEC_CALL
&& code
->expr1
->ts
.type
== BT_DERIVED
11480 && code
->expr1
->ts
.u
.derived
11481 && code
->expr1
->ts
.u
.derived
->attr
.defined_assign_comp
)
11482 generate_component_assignments (&code
, ns
);
11486 case EXEC_LABEL_ASSIGN
:
11487 if (code
->label1
->defined
== ST_LABEL_UNKNOWN
)
11488 gfc_error ("Label %d referenced at %L is never defined",
11489 code
->label1
->value
, &code
->label1
->where
);
11491 && (code
->expr1
->expr_type
!= EXPR_VARIABLE
11492 || code
->expr1
->symtree
->n
.sym
->ts
.type
!= BT_INTEGER
11493 || code
->expr1
->symtree
->n
.sym
->ts
.kind
11494 != gfc_default_integer_kind
11495 || code
->expr1
->symtree
->n
.sym
->as
!= NULL
))
11496 gfc_error ("ASSIGN statement at %L requires a scalar "
11497 "default INTEGER variable", &code
->expr1
->where
);
11500 case EXEC_POINTER_ASSIGN
:
11507 /* This is both a variable definition and pointer assignment
11508 context, so check both of them. For rank remapping, a final
11509 array ref may be present on the LHS and fool gfc_expr_attr
11510 used in gfc_check_vardef_context. Remove it. */
11511 e
= remove_last_array_ref (code
->expr1
);
11512 t
= gfc_check_vardef_context (e
, true, false, false,
11513 _("pointer assignment"));
11515 t
= gfc_check_vardef_context (e
, false, false, false,
11516 _("pointer assignment"));
11519 t
= gfc_check_pointer_assign (code
->expr1
, code
->expr2
, !t
) && t
;
11524 /* Assigning a class object always is a regular assign. */
11525 if (code
->expr2
->ts
.type
== BT_CLASS
11526 && code
->expr1
->ts
.type
== BT_CLASS
11527 && !CLASS_DATA (code
->expr2
)->attr
.dimension
11528 && !(gfc_expr_attr (code
->expr1
).proc_pointer
11529 && code
->expr2
->expr_type
== EXPR_VARIABLE
11530 && code
->expr2
->symtree
->n
.sym
->attr
.flavor
11532 code
->op
= EXEC_ASSIGN
;
11536 case EXEC_ARITHMETIC_IF
:
11538 gfc_expr
*e
= code
->expr1
;
11540 gfc_resolve_expr (e
);
11541 if (e
->expr_type
== EXPR_NULL
)
11542 gfc_error ("Invalid NULL at %L", &e
->where
);
11544 if (t
&& (e
->rank
> 0
11545 || !(e
->ts
.type
== BT_REAL
|| e
->ts
.type
== BT_INTEGER
)))
11546 gfc_error ("Arithmetic IF statement at %L requires a scalar "
11547 "REAL or INTEGER expression", &e
->where
);
11549 resolve_branch (code
->label1
, code
);
11550 resolve_branch (code
->label2
, code
);
11551 resolve_branch (code
->label3
, code
);
11556 if (t
&& code
->expr1
!= NULL
11557 && (code
->expr1
->ts
.type
!= BT_LOGICAL
11558 || code
->expr1
->rank
!= 0))
11559 gfc_error ("IF clause at %L requires a scalar LOGICAL expression",
11560 &code
->expr1
->where
);
11565 resolve_call (code
);
11568 case EXEC_COMPCALL
:
11570 resolve_typebound_subroutine (code
);
11573 case EXEC_CALL_PPC
:
11574 resolve_ppc_call (code
);
11578 /* Select is complicated. Also, a SELECT construct could be
11579 a transformed computed GOTO. */
11580 resolve_select (code
, false);
11583 case EXEC_SELECT_TYPE
:
11584 resolve_select_type (code
, ns
);
11588 resolve_block_construct (code
);
11592 if (code
->ext
.iterator
!= NULL
)
11594 gfc_iterator
*iter
= code
->ext
.iterator
;
11595 if (gfc_resolve_iterator (iter
, true, false))
11596 gfc_resolve_do_iterator (code
, iter
->var
->symtree
->n
.sym
,
11601 case EXEC_DO_WHILE
:
11602 if (code
->expr1
== NULL
)
11603 gfc_internal_error ("gfc_resolve_code(): No expression on "
11606 && (code
->expr1
->rank
!= 0
11607 || code
->expr1
->ts
.type
!= BT_LOGICAL
))
11608 gfc_error ("Exit condition of DO WHILE loop at %L must be "
11609 "a scalar LOGICAL expression", &code
->expr1
->where
);
11612 case EXEC_ALLOCATE
:
11614 resolve_allocate_deallocate (code
, "ALLOCATE");
11618 case EXEC_DEALLOCATE
:
11620 resolve_allocate_deallocate (code
, "DEALLOCATE");
11625 if (!gfc_resolve_open (code
->ext
.open
))
11628 resolve_branch (code
->ext
.open
->err
, code
);
11632 if (!gfc_resolve_close (code
->ext
.close
))
11635 resolve_branch (code
->ext
.close
->err
, code
);
11638 case EXEC_BACKSPACE
:
11642 if (!gfc_resolve_filepos (code
->ext
.filepos
, &code
->loc
))
11645 resolve_branch (code
->ext
.filepos
->err
, code
);
11649 if (!gfc_resolve_inquire (code
->ext
.inquire
))
11652 resolve_branch (code
->ext
.inquire
->err
, code
);
11655 case EXEC_IOLENGTH
:
11656 gcc_assert (code
->ext
.inquire
!= NULL
);
11657 if (!gfc_resolve_inquire (code
->ext
.inquire
))
11660 resolve_branch (code
->ext
.inquire
->err
, code
);
11664 if (!gfc_resolve_wait (code
->ext
.wait
))
11667 resolve_branch (code
->ext
.wait
->err
, code
);
11668 resolve_branch (code
->ext
.wait
->end
, code
);
11669 resolve_branch (code
->ext
.wait
->eor
, code
);
11674 if (!gfc_resolve_dt (code
->ext
.dt
, &code
->loc
))
11677 resolve_branch (code
->ext
.dt
->err
, code
);
11678 resolve_branch (code
->ext
.dt
->end
, code
);
11679 resolve_branch (code
->ext
.dt
->eor
, code
);
11682 case EXEC_TRANSFER
:
11683 resolve_transfer (code
);
11686 case EXEC_DO_CONCURRENT
:
11688 resolve_forall_iterators (code
->ext
.forall_iterator
);
11690 if (code
->expr1
!= NULL
11691 && (code
->expr1
->ts
.type
!= BT_LOGICAL
|| code
->expr1
->rank
))
11692 gfc_error ("FORALL mask clause at %L requires a scalar LOGICAL "
11693 "expression", &code
->expr1
->where
);
11696 case EXEC_OACC_PARALLEL_LOOP
:
11697 case EXEC_OACC_PARALLEL
:
11698 case EXEC_OACC_KERNELS_LOOP
:
11699 case EXEC_OACC_KERNELS
:
11700 case EXEC_OACC_DATA
:
11701 case EXEC_OACC_HOST_DATA
:
11702 case EXEC_OACC_LOOP
:
11703 case EXEC_OACC_UPDATE
:
11704 case EXEC_OACC_WAIT
:
11705 case EXEC_OACC_CACHE
:
11706 case EXEC_OACC_ENTER_DATA
:
11707 case EXEC_OACC_EXIT_DATA
:
11708 case EXEC_OACC_ATOMIC
:
11709 case EXEC_OACC_DECLARE
:
11710 gfc_resolve_oacc_directive (code
, ns
);
11713 case EXEC_OMP_ATOMIC
:
11714 case EXEC_OMP_BARRIER
:
11715 case EXEC_OMP_CANCEL
:
11716 case EXEC_OMP_CANCELLATION_POINT
:
11717 case EXEC_OMP_CRITICAL
:
11718 case EXEC_OMP_FLUSH
:
11719 case EXEC_OMP_DISTRIBUTE
:
11720 case EXEC_OMP_DISTRIBUTE_PARALLEL_DO
:
11721 case EXEC_OMP_DISTRIBUTE_PARALLEL_DO_SIMD
:
11722 case EXEC_OMP_DISTRIBUTE_SIMD
:
11724 case EXEC_OMP_DO_SIMD
:
11725 case EXEC_OMP_MASTER
:
11726 case EXEC_OMP_ORDERED
:
11727 case EXEC_OMP_SECTIONS
:
11728 case EXEC_OMP_SIMD
:
11729 case EXEC_OMP_SINGLE
:
11730 case EXEC_OMP_TARGET
:
11731 case EXEC_OMP_TARGET_DATA
:
11732 case EXEC_OMP_TARGET_ENTER_DATA
:
11733 case EXEC_OMP_TARGET_EXIT_DATA
:
11734 case EXEC_OMP_TARGET_PARALLEL
:
11735 case EXEC_OMP_TARGET_PARALLEL_DO
:
11736 case EXEC_OMP_TARGET_PARALLEL_DO_SIMD
:
11737 case EXEC_OMP_TARGET_SIMD
:
11738 case EXEC_OMP_TARGET_TEAMS
:
11739 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE
:
11740 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO
:
11741 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
11742 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_SIMD
:
11743 case EXEC_OMP_TARGET_UPDATE
:
11744 case EXEC_OMP_TASK
:
11745 case EXEC_OMP_TASKGROUP
:
11746 case EXEC_OMP_TASKLOOP
:
11747 case EXEC_OMP_TASKLOOP_SIMD
:
11748 case EXEC_OMP_TASKWAIT
:
11749 case EXEC_OMP_TASKYIELD
:
11750 case EXEC_OMP_TEAMS
:
11751 case EXEC_OMP_TEAMS_DISTRIBUTE
:
11752 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO
:
11753 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
11754 case EXEC_OMP_TEAMS_DISTRIBUTE_SIMD
:
11755 case EXEC_OMP_WORKSHARE
:
11756 gfc_resolve_omp_directive (code
, ns
);
11759 case EXEC_OMP_PARALLEL
:
11760 case EXEC_OMP_PARALLEL_DO
:
11761 case EXEC_OMP_PARALLEL_DO_SIMD
:
11762 case EXEC_OMP_PARALLEL_SECTIONS
:
11763 case EXEC_OMP_PARALLEL_WORKSHARE
:
11764 omp_workshare_save
= omp_workshare_flag
;
11765 omp_workshare_flag
= 0;
11766 gfc_resolve_omp_directive (code
, ns
);
11767 omp_workshare_flag
= omp_workshare_save
;
11771 gfc_internal_error ("gfc_resolve_code(): Bad statement code");
11775 cs_base
= frame
.prev
;
11779 /* Resolve initial values and make sure they are compatible with
11783 resolve_values (gfc_symbol
*sym
)
11787 if (sym
->value
== NULL
)
11790 if (sym
->value
->expr_type
== EXPR_STRUCTURE
)
11791 t
= resolve_structure_cons (sym
->value
, 1);
11793 t
= gfc_resolve_expr (sym
->value
);
11798 gfc_check_assign_symbol (sym
, NULL
, sym
->value
);
11802 /* Verify any BIND(C) derived types in the namespace so we can report errors
11803 for them once, rather than for each variable declared of that type. */
11806 resolve_bind_c_derived_types (gfc_symbol
*derived_sym
)
11808 if (derived_sym
!= NULL
&& derived_sym
->attr
.flavor
== FL_DERIVED
11809 && derived_sym
->attr
.is_bind_c
== 1)
11810 verify_bind_c_derived_type (derived_sym
);
11816 /* Check the interfaces of DTIO procedures associated with derived
11817 type 'sym'. These procedures can either have typebound bindings or
11818 can appear in DTIO generic interfaces. */
11821 gfc_verify_DTIO_procedures (gfc_symbol
*sym
)
11823 if (!sym
|| sym
->attr
.flavor
!= FL_DERIVED
)
11826 gfc_check_dtio_interfaces (sym
);
11831 /* Verify that any binding labels used in a given namespace do not collide
11832 with the names or binding labels of any global symbols. Multiple INTERFACE
11833 for the same procedure are permitted. */
11836 gfc_verify_binding_labels (gfc_symbol
*sym
)
11839 const char *module
;
11841 if (!sym
|| !sym
->attr
.is_bind_c
|| sym
->attr
.is_iso_c
11842 || sym
->attr
.flavor
== FL_DERIVED
|| !sym
->binding_label
)
11845 gsym
= gfc_find_case_gsymbol (gfc_gsym_root
, sym
->binding_label
);
11848 module
= sym
->module
;
11849 else if (sym
->ns
&& sym
->ns
->proc_name
11850 && sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
)
11851 module
= sym
->ns
->proc_name
->name
;
11852 else if (sym
->ns
&& sym
->ns
->parent
11853 && sym
->ns
&& sym
->ns
->parent
->proc_name
11854 && sym
->ns
->parent
->proc_name
->attr
.flavor
== FL_MODULE
)
11855 module
= sym
->ns
->parent
->proc_name
->name
;
11861 && (gsym
->type
== GSYM_FUNCTION
|| gsym
->type
== GSYM_SUBROUTINE
)))
11864 gsym
= gfc_get_gsymbol (sym
->binding_label
, true);
11865 gsym
->where
= sym
->declared_at
;
11866 gsym
->sym_name
= sym
->name
;
11867 gsym
->binding_label
= sym
->binding_label
;
11868 gsym
->ns
= sym
->ns
;
11869 gsym
->mod_name
= module
;
11870 if (sym
->attr
.function
)
11871 gsym
->type
= GSYM_FUNCTION
;
11872 else if (sym
->attr
.subroutine
)
11873 gsym
->type
= GSYM_SUBROUTINE
;
11874 /* Mark as variable/procedure as defined, unless its an INTERFACE. */
11875 gsym
->defined
= sym
->attr
.if_source
!= IFSRC_IFBODY
;
11879 if (sym
->attr
.flavor
== FL_VARIABLE
&& gsym
->type
!= GSYM_UNKNOWN
)
11881 gfc_error ("Variable %qs with binding label %qs at %L uses the same global "
11882 "identifier as entity at %L", sym
->name
,
11883 sym
->binding_label
, &sym
->declared_at
, &gsym
->where
);
11884 /* Clear the binding label to prevent checking multiple times. */
11885 sym
->binding_label
= NULL
;
11889 if (sym
->attr
.flavor
== FL_VARIABLE
&& module
11890 && (strcmp (module
, gsym
->mod_name
) != 0
11891 || strcmp (sym
->name
, gsym
->sym_name
) != 0))
11893 /* This can only happen if the variable is defined in a module - if it
11894 isn't the same module, reject it. */
11895 gfc_error ("Variable %qs from module %qs with binding label %qs at %L "
11896 "uses the same global identifier as entity at %L from module %qs",
11897 sym
->name
, module
, sym
->binding_label
,
11898 &sym
->declared_at
, &gsym
->where
, gsym
->mod_name
);
11899 sym
->binding_label
= NULL
;
11903 if ((sym
->attr
.function
|| sym
->attr
.subroutine
)
11904 && ((gsym
->type
!= GSYM_SUBROUTINE
&& gsym
->type
!= GSYM_FUNCTION
)
11905 || (gsym
->defined
&& sym
->attr
.if_source
!= IFSRC_IFBODY
))
11906 && (sym
!= gsym
->ns
->proc_name
&& sym
->attr
.entry
== 0)
11907 && (module
!= gsym
->mod_name
11908 || strcmp (gsym
->sym_name
, sym
->name
) != 0
11909 || (module
&& strcmp (module
, gsym
->mod_name
) != 0)))
11911 /* Print an error if the procedure is defined multiple times; we have to
11912 exclude references to the same procedure via module association or
11913 multiple checks for the same procedure. */
11914 gfc_error ("Procedure %qs with binding label %qs at %L uses the same "
11915 "global identifier as entity at %L", sym
->name
,
11916 sym
->binding_label
, &sym
->declared_at
, &gsym
->where
);
11917 sym
->binding_label
= NULL
;
11922 /* Resolve an index expression. */
11925 resolve_index_expr (gfc_expr
*e
)
11927 if (!gfc_resolve_expr (e
))
11930 if (!gfc_simplify_expr (e
, 0))
11933 if (!gfc_specification_expr (e
))
11940 /* Resolve a charlen structure. */
11943 resolve_charlen (gfc_charlen
*cl
)
11946 bool saved_specification_expr
;
11952 saved_specification_expr
= specification_expr
;
11953 specification_expr
= true;
11955 if (cl
->length_from_typespec
)
11957 if (!gfc_resolve_expr (cl
->length
))
11959 specification_expr
= saved_specification_expr
;
11963 if (!gfc_simplify_expr (cl
->length
, 0))
11965 specification_expr
= saved_specification_expr
;
11969 /* cl->length has been resolved. It should have an integer type. */
11970 if (cl
->length
->ts
.type
!= BT_INTEGER
)
11972 gfc_error ("Scalar INTEGER expression expected at %L",
11973 &cl
->length
->where
);
11979 if (!resolve_index_expr (cl
->length
))
11981 specification_expr
= saved_specification_expr
;
11986 /* F2008, 4.4.3.2: If the character length parameter value evaluates to
11987 a negative value, the length of character entities declared is zero. */
11988 if (cl
->length
&& cl
->length
->expr_type
== EXPR_CONSTANT
11989 && mpz_sgn (cl
->length
->value
.integer
) < 0)
11990 gfc_replace_expr (cl
->length
,
11991 gfc_get_int_expr (gfc_charlen_int_kind
, NULL
, 0));
11993 /* Check that the character length is not too large. */
11994 k
= gfc_validate_kind (BT_INTEGER
, gfc_charlen_int_kind
, false);
11995 if (cl
->length
&& cl
->length
->expr_type
== EXPR_CONSTANT
11996 && cl
->length
->ts
.type
== BT_INTEGER
11997 && mpz_cmp (cl
->length
->value
.integer
, gfc_integer_kinds
[k
].huge
) > 0)
11999 gfc_error ("String length at %L is too large", &cl
->length
->where
);
12000 specification_expr
= saved_specification_expr
;
12004 specification_expr
= saved_specification_expr
;
12009 /* Test for non-constant shape arrays. */
12012 is_non_constant_shape_array (gfc_symbol
*sym
)
12018 not_constant
= false;
12019 if (sym
->as
!= NULL
)
12021 /* Unfortunately, !gfc_is_compile_time_shape hits a legal case that
12022 has not been simplified; parameter array references. Do the
12023 simplification now. */
12024 for (i
= 0; i
< sym
->as
->rank
+ sym
->as
->corank
; i
++)
12026 e
= sym
->as
->lower
[i
];
12027 if (e
&& (!resolve_index_expr(e
)
12028 || !gfc_is_constant_expr (e
)))
12029 not_constant
= true;
12030 e
= sym
->as
->upper
[i
];
12031 if (e
&& (!resolve_index_expr(e
)
12032 || !gfc_is_constant_expr (e
)))
12033 not_constant
= true;
12036 return not_constant
;
12039 /* Given a symbol and an initialization expression, add code to initialize
12040 the symbol to the function entry. */
12042 build_init_assign (gfc_symbol
*sym
, gfc_expr
*init
)
12046 gfc_namespace
*ns
= sym
->ns
;
12048 /* Search for the function namespace if this is a contained
12049 function without an explicit result. */
12050 if (sym
->attr
.function
&& sym
== sym
->result
12051 && sym
->name
!= sym
->ns
->proc_name
->name
)
12053 ns
= ns
->contained
;
12054 for (;ns
; ns
= ns
->sibling
)
12055 if (strcmp (ns
->proc_name
->name
, sym
->name
) == 0)
12061 gfc_free_expr (init
);
12065 /* Build an l-value expression for the result. */
12066 lval
= gfc_lval_expr_from_sym (sym
);
12068 /* Add the code at scope entry. */
12069 init_st
= gfc_get_code (EXEC_INIT_ASSIGN
);
12070 init_st
->next
= ns
->code
;
12071 ns
->code
= init_st
;
12073 /* Assign the default initializer to the l-value. */
12074 init_st
->loc
= sym
->declared_at
;
12075 init_st
->expr1
= lval
;
12076 init_st
->expr2
= init
;
12080 /* Whether or not we can generate a default initializer for a symbol. */
12083 can_generate_init (gfc_symbol
*sym
)
12085 symbol_attribute
*a
;
12090 /* These symbols should never have a default initialization. */
12095 || (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
)
12096 && (CLASS_DATA (sym
)->attr
.class_pointer
12097 || CLASS_DATA (sym
)->attr
.proc_pointer
))
12098 || a
->in_equivalence
12105 || (!a
->referenced
&& !a
->result
)
12106 || (a
->dummy
&& a
->intent
!= INTENT_OUT
)
12107 || (a
->function
&& sym
!= sym
->result
)
12112 /* Assign the default initializer to a derived type variable or result. */
12115 apply_default_init (gfc_symbol
*sym
)
12117 gfc_expr
*init
= NULL
;
12119 if (sym
->attr
.flavor
!= FL_VARIABLE
&& !sym
->attr
.function
)
12122 if (sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
)
12123 init
= gfc_generate_initializer (&sym
->ts
, can_generate_init (sym
));
12125 if (init
== NULL
&& sym
->ts
.type
!= BT_CLASS
)
12128 build_init_assign (sym
, init
);
12129 sym
->attr
.referenced
= 1;
12133 /* Build an initializer for a local. Returns null if the symbol should not have
12134 a default initialization. */
12137 build_default_init_expr (gfc_symbol
*sym
)
12139 /* These symbols should never have a default initialization. */
12140 if (sym
->attr
.allocatable
12141 || sym
->attr
.external
12143 || sym
->attr
.pointer
12144 || sym
->attr
.in_equivalence
12145 || sym
->attr
.in_common
12148 || sym
->attr
.cray_pointee
12149 || sym
->attr
.cray_pointer
12153 /* Get the appropriate init expression. */
12154 return gfc_build_default_init_expr (&sym
->ts
, &sym
->declared_at
);
12157 /* Add an initialization expression to a local variable. */
12159 apply_default_init_local (gfc_symbol
*sym
)
12161 gfc_expr
*init
= NULL
;
12163 /* The symbol should be a variable or a function return value. */
12164 if ((sym
->attr
.flavor
!= FL_VARIABLE
&& !sym
->attr
.function
)
12165 || (sym
->attr
.function
&& sym
->result
!= sym
))
12168 /* Try to build the initializer expression. If we can't initialize
12169 this symbol, then init will be NULL. */
12170 init
= build_default_init_expr (sym
);
12174 /* For saved variables, we don't want to add an initializer at function
12175 entry, so we just add a static initializer. Note that automatic variables
12176 are stack allocated even with -fno-automatic; we have also to exclude
12177 result variable, which are also nonstatic. */
12178 if (!sym
->attr
.automatic
12179 && (sym
->attr
.save
|| sym
->ns
->save_all
12180 || (flag_max_stack_var_size
== 0 && !sym
->attr
.result
12181 && (sym
->ns
->proc_name
&& !sym
->ns
->proc_name
->attr
.recursive
)
12182 && (!sym
->attr
.dimension
|| !is_non_constant_shape_array (sym
)))))
12184 /* Don't clobber an existing initializer! */
12185 gcc_assert (sym
->value
== NULL
);
12190 build_init_assign (sym
, init
);
12194 /* Resolution of common features of flavors variable and procedure. */
12197 resolve_fl_var_and_proc (gfc_symbol
*sym
, int mp_flag
)
12199 gfc_array_spec
*as
;
12201 if (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
)
12202 as
= CLASS_DATA (sym
)->as
;
12206 /* Constraints on deferred shape variable. */
12207 if (as
== NULL
|| as
->type
!= AS_DEFERRED
)
12209 bool pointer
, allocatable
, dimension
;
12211 if (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
)
12213 pointer
= CLASS_DATA (sym
)->attr
.class_pointer
;
12214 allocatable
= CLASS_DATA (sym
)->attr
.allocatable
;
12215 dimension
= CLASS_DATA (sym
)->attr
.dimension
;
12219 pointer
= sym
->attr
.pointer
&& !sym
->attr
.select_type_temporary
;
12220 allocatable
= sym
->attr
.allocatable
;
12221 dimension
= sym
->attr
.dimension
;
12226 if (dimension
&& as
->type
!= AS_ASSUMED_RANK
)
12228 gfc_error ("Allocatable array %qs at %L must have a deferred "
12229 "shape or assumed rank", sym
->name
, &sym
->declared_at
);
12232 else if (!gfc_notify_std (GFC_STD_F2003
, "Scalar object "
12233 "%qs at %L may not be ALLOCATABLE",
12234 sym
->name
, &sym
->declared_at
))
12238 if (pointer
&& dimension
&& as
->type
!= AS_ASSUMED_RANK
)
12240 gfc_error ("Array pointer %qs at %L must have a deferred shape or "
12241 "assumed rank", sym
->name
, &sym
->declared_at
);
12247 if (!mp_flag
&& !sym
->attr
.allocatable
&& !sym
->attr
.pointer
12248 && sym
->ts
.type
!= BT_CLASS
&& !sym
->assoc
)
12250 gfc_error ("Array %qs at %L cannot have a deferred shape",
12251 sym
->name
, &sym
->declared_at
);
12256 /* Constraints on polymorphic variables. */
12257 if (sym
->ts
.type
== BT_CLASS
&& !(sym
->result
&& sym
->result
!= sym
))
12260 if (sym
->attr
.class_ok
12261 && !sym
->attr
.select_type_temporary
12262 && !UNLIMITED_POLY (sym
)
12263 && !gfc_type_is_extensible (CLASS_DATA (sym
)->ts
.u
.derived
))
12265 gfc_error ("Type %qs of CLASS variable %qs at %L is not extensible",
12266 CLASS_DATA (sym
)->ts
.u
.derived
->name
, sym
->name
,
12267 &sym
->declared_at
);
12272 /* Assume that use associated symbols were checked in the module ns.
12273 Class-variables that are associate-names are also something special
12274 and excepted from the test. */
12275 if (!sym
->attr
.class_ok
&& !sym
->attr
.use_assoc
&& !sym
->assoc
)
12277 gfc_error ("CLASS variable %qs at %L must be dummy, allocatable "
12278 "or pointer", sym
->name
, &sym
->declared_at
);
12287 /* Additional checks for symbols with flavor variable and derived
12288 type. To be called from resolve_fl_variable. */
12291 resolve_fl_variable_derived (gfc_symbol
*sym
, int no_init_flag
)
12293 gcc_assert (sym
->ts
.type
== BT_DERIVED
|| sym
->ts
.type
== BT_CLASS
);
12295 /* Check to see if a derived type is blocked from being host
12296 associated by the presence of another class I symbol in the same
12297 namespace. 14.6.1.3 of the standard and the discussion on
12298 comp.lang.fortran. */
12299 if (sym
->ns
!= sym
->ts
.u
.derived
->ns
12300 && !sym
->ts
.u
.derived
->attr
.use_assoc
12301 && sym
->ns
->proc_name
->attr
.if_source
!= IFSRC_IFBODY
)
12304 gfc_find_symbol (sym
->ts
.u
.derived
->name
, sym
->ns
, 0, &s
);
12305 if (s
&& s
->attr
.generic
)
12306 s
= gfc_find_dt_in_generic (s
);
12307 if (s
&& !gfc_fl_struct (s
->attr
.flavor
))
12309 gfc_error ("The type %qs cannot be host associated at %L "
12310 "because it is blocked by an incompatible object "
12311 "of the same name declared at %L",
12312 sym
->ts
.u
.derived
->name
, &sym
->declared_at
,
12318 /* 4th constraint in section 11.3: "If an object of a type for which
12319 component-initialization is specified (R429) appears in the
12320 specification-part of a module and does not have the ALLOCATABLE
12321 or POINTER attribute, the object shall have the SAVE attribute."
12323 The check for initializers is performed with
12324 gfc_has_default_initializer because gfc_default_initializer generates
12325 a hidden default for allocatable components. */
12326 if (!(sym
->value
|| no_init_flag
) && sym
->ns
->proc_name
12327 && sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
12328 && !(sym
->ns
->save_all
&& !sym
->attr
.automatic
) && !sym
->attr
.save
12329 && !sym
->attr
.pointer
&& !sym
->attr
.allocatable
12330 && gfc_has_default_initializer (sym
->ts
.u
.derived
)
12331 && !gfc_notify_std (GFC_STD_F2008
, "Implied SAVE for module variable "
12332 "%qs at %L, needed due to the default "
12333 "initialization", sym
->name
, &sym
->declared_at
))
12336 /* Assign default initializer. */
12337 if (!(sym
->value
|| sym
->attr
.pointer
|| sym
->attr
.allocatable
)
12338 && (!no_init_flag
|| sym
->attr
.intent
== INTENT_OUT
))
12339 sym
->value
= gfc_generate_initializer (&sym
->ts
, can_generate_init (sym
));
12345 /* F2008, C402 (R401): A colon shall not be used as a type-param-value
12346 except in the declaration of an entity or component that has the POINTER
12347 or ALLOCATABLE attribute. */
12350 deferred_requirements (gfc_symbol
*sym
)
12352 if (sym
->ts
.deferred
12353 && !(sym
->attr
.pointer
12354 || sym
->attr
.allocatable
12355 || sym
->attr
.associate_var
12356 || sym
->attr
.omp_udr_artificial_var
))
12358 gfc_error ("Entity %qs at %L has a deferred type parameter and "
12359 "requires either the POINTER or ALLOCATABLE attribute",
12360 sym
->name
, &sym
->declared_at
);
12367 /* Resolve symbols with flavor variable. */
12370 resolve_fl_variable (gfc_symbol
*sym
, int mp_flag
)
12372 const char *auto_save_msg
= "Automatic object %qs at %L cannot have the "
12375 if (!resolve_fl_var_and_proc (sym
, mp_flag
))
12378 /* Set this flag to check that variables are parameters of all entries.
12379 This check is effected by the call to gfc_resolve_expr through
12380 is_non_constant_shape_array. */
12381 bool saved_specification_expr
= specification_expr
;
12382 specification_expr
= true;
12384 if (sym
->ns
->proc_name
12385 && (sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
12386 || sym
->ns
->proc_name
->attr
.is_main_program
)
12387 && !sym
->attr
.use_assoc
12388 && !sym
->attr
.allocatable
12389 && !sym
->attr
.pointer
12390 && is_non_constant_shape_array (sym
))
12392 /* F08:C541. The shape of an array defined in a main program or module
12393 * needs to be constant. */
12394 gfc_error ("The module or main program array %qs at %L must "
12395 "have constant shape", sym
->name
, &sym
->declared_at
);
12396 specification_expr
= saved_specification_expr
;
12400 /* Constraints on deferred type parameter. */
12401 if (!deferred_requirements (sym
))
12404 if (sym
->ts
.type
== BT_CHARACTER
&& !sym
->attr
.associate_var
)
12406 /* Make sure that character string variables with assumed length are
12407 dummy arguments. */
12408 gfc_expr
*e
= NULL
;
12411 e
= sym
->ts
.u
.cl
->length
;
12415 if (e
== NULL
&& !sym
->attr
.dummy
&& !sym
->attr
.result
12416 && !sym
->ts
.deferred
&& !sym
->attr
.select_type_temporary
12417 && !sym
->attr
.omp_udr_artificial_var
)
12419 gfc_error ("Entity with assumed character length at %L must be a "
12420 "dummy argument or a PARAMETER", &sym
->declared_at
);
12421 specification_expr
= saved_specification_expr
;
12425 if (e
&& sym
->attr
.save
== SAVE_EXPLICIT
&& !gfc_is_constant_expr (e
))
12427 gfc_error (auto_save_msg
, sym
->name
, &sym
->declared_at
);
12428 specification_expr
= saved_specification_expr
;
12432 if (!gfc_is_constant_expr (e
)
12433 && !(e
->expr_type
== EXPR_VARIABLE
12434 && e
->symtree
->n
.sym
->attr
.flavor
== FL_PARAMETER
))
12436 if (!sym
->attr
.use_assoc
&& sym
->ns
->proc_name
12437 && (sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
12438 || sym
->ns
->proc_name
->attr
.is_main_program
))
12440 gfc_error ("%qs at %L must have constant character length "
12441 "in this context", sym
->name
, &sym
->declared_at
);
12442 specification_expr
= saved_specification_expr
;
12445 if (sym
->attr
.in_common
)
12447 gfc_error ("COMMON variable %qs at %L must have constant "
12448 "character length", sym
->name
, &sym
->declared_at
);
12449 specification_expr
= saved_specification_expr
;
12455 if (sym
->value
== NULL
&& sym
->attr
.referenced
)
12456 apply_default_init_local (sym
); /* Try to apply a default initialization. */
12458 /* Determine if the symbol may not have an initializer. */
12459 int no_init_flag
= 0, automatic_flag
= 0;
12460 if (sym
->attr
.allocatable
|| sym
->attr
.external
|| sym
->attr
.dummy
12461 || sym
->attr
.intrinsic
|| sym
->attr
.result
)
12463 else if ((sym
->attr
.dimension
|| sym
->attr
.codimension
) && !sym
->attr
.pointer
12464 && is_non_constant_shape_array (sym
))
12466 no_init_flag
= automatic_flag
= 1;
12468 /* Also, they must not have the SAVE attribute.
12469 SAVE_IMPLICIT is checked below. */
12470 if (sym
->as
&& sym
->attr
.codimension
)
12472 int corank
= sym
->as
->corank
;
12473 sym
->as
->corank
= 0;
12474 no_init_flag
= automatic_flag
= is_non_constant_shape_array (sym
);
12475 sym
->as
->corank
= corank
;
12477 if (automatic_flag
&& sym
->attr
.save
== SAVE_EXPLICIT
)
12479 gfc_error (auto_save_msg
, sym
->name
, &sym
->declared_at
);
12480 specification_expr
= saved_specification_expr
;
12485 /* Ensure that any initializer is simplified. */
12487 gfc_simplify_expr (sym
->value
, 1);
12489 /* Reject illegal initializers. */
12490 if (!sym
->mark
&& sym
->value
)
12492 if (sym
->attr
.allocatable
|| (sym
->ts
.type
== BT_CLASS
12493 && CLASS_DATA (sym
)->attr
.allocatable
))
12494 gfc_error ("Allocatable %qs at %L cannot have an initializer",
12495 sym
->name
, &sym
->declared_at
);
12496 else if (sym
->attr
.external
)
12497 gfc_error ("External %qs at %L cannot have an initializer",
12498 sym
->name
, &sym
->declared_at
);
12499 else if (sym
->attr
.dummy
12500 && !(sym
->ts
.type
== BT_DERIVED
&& sym
->attr
.intent
== INTENT_OUT
))
12501 gfc_error ("Dummy %qs at %L cannot have an initializer",
12502 sym
->name
, &sym
->declared_at
);
12503 else if (sym
->attr
.intrinsic
)
12504 gfc_error ("Intrinsic %qs at %L cannot have an initializer",
12505 sym
->name
, &sym
->declared_at
);
12506 else if (sym
->attr
.result
)
12507 gfc_error ("Function result %qs at %L cannot have an initializer",
12508 sym
->name
, &sym
->declared_at
);
12509 else if (automatic_flag
)
12510 gfc_error ("Automatic array %qs at %L cannot have an initializer",
12511 sym
->name
, &sym
->declared_at
);
12513 goto no_init_error
;
12514 specification_expr
= saved_specification_expr
;
12519 if (sym
->ts
.type
== BT_DERIVED
|| sym
->ts
.type
== BT_CLASS
)
12521 bool res
= resolve_fl_variable_derived (sym
, no_init_flag
);
12522 specification_expr
= saved_specification_expr
;
12526 specification_expr
= saved_specification_expr
;
12531 /* Compare the dummy characteristics of a module procedure interface
12532 declaration with the corresponding declaration in a submodule. */
12533 static gfc_formal_arglist
*new_formal
;
12534 static char errmsg
[200];
12537 compare_fsyms (gfc_symbol
*sym
)
12541 if (sym
== NULL
|| new_formal
== NULL
)
12544 fsym
= new_formal
->sym
;
12549 if (strcmp (sym
->name
, fsym
->name
) == 0)
12551 if (!gfc_check_dummy_characteristics (fsym
, sym
, true, errmsg
, 200))
12552 gfc_error ("%s at %L", errmsg
, &fsym
->declared_at
);
12557 /* Resolve a procedure. */
12560 resolve_fl_procedure (gfc_symbol
*sym
, int mp_flag
)
12562 gfc_formal_arglist
*arg
;
12564 if (sym
->attr
.function
12565 && !resolve_fl_var_and_proc (sym
, mp_flag
))
12568 if (sym
->ts
.type
== BT_CHARACTER
)
12570 gfc_charlen
*cl
= sym
->ts
.u
.cl
;
12572 if (cl
&& cl
->length
&& gfc_is_constant_expr (cl
->length
)
12573 && !resolve_charlen (cl
))
12576 if ((!cl
|| !cl
->length
|| cl
->length
->expr_type
!= EXPR_CONSTANT
)
12577 && sym
->attr
.proc
== PROC_ST_FUNCTION
)
12579 gfc_error ("Character-valued statement function %qs at %L must "
12580 "have constant length", sym
->name
, &sym
->declared_at
);
12585 /* Ensure that derived type for are not of a private type. Internal
12586 module procedures are excluded by 2.2.3.3 - i.e., they are not
12587 externally accessible and can access all the objects accessible in
12589 if (!(sym
->ns
->parent
&& sym
->ns
->parent
->proc_name
12590 && sym
->ns
->parent
->proc_name
->attr
.flavor
== FL_MODULE
)
12591 && gfc_check_symbol_access (sym
))
12593 gfc_interface
*iface
;
12595 for (arg
= gfc_sym_get_dummy_args (sym
); arg
; arg
= arg
->next
)
12598 && arg
->sym
->ts
.type
== BT_DERIVED
12599 && !arg
->sym
->ts
.u
.derived
->attr
.use_assoc
12600 && !gfc_check_symbol_access (arg
->sym
->ts
.u
.derived
)
12601 && !gfc_notify_std (GFC_STD_F2003
, "%qs is of a PRIVATE type "
12602 "and cannot be a dummy argument"
12603 " of %qs, which is PUBLIC at %L",
12604 arg
->sym
->name
, sym
->name
,
12605 &sym
->declared_at
))
12607 /* Stop this message from recurring. */
12608 arg
->sym
->ts
.u
.derived
->attr
.access
= ACCESS_PUBLIC
;
12613 /* PUBLIC interfaces may expose PRIVATE procedures that take types
12614 PRIVATE to the containing module. */
12615 for (iface
= sym
->generic
; iface
; iface
= iface
->next
)
12617 for (arg
= gfc_sym_get_dummy_args (iface
->sym
); arg
; arg
= arg
->next
)
12620 && arg
->sym
->ts
.type
== BT_DERIVED
12621 && !arg
->sym
->ts
.u
.derived
->attr
.use_assoc
12622 && !gfc_check_symbol_access (arg
->sym
->ts
.u
.derived
)
12623 && !gfc_notify_std (GFC_STD_F2003
, "Procedure %qs in "
12624 "PUBLIC interface %qs at %L "
12625 "takes dummy arguments of %qs which "
12626 "is PRIVATE", iface
->sym
->name
,
12627 sym
->name
, &iface
->sym
->declared_at
,
12628 gfc_typename(&arg
->sym
->ts
)))
12630 /* Stop this message from recurring. */
12631 arg
->sym
->ts
.u
.derived
->attr
.access
= ACCESS_PUBLIC
;
12638 if (sym
->attr
.function
&& sym
->value
&& sym
->attr
.proc
!= PROC_ST_FUNCTION
12639 && !sym
->attr
.proc_pointer
)
12641 gfc_error ("Function %qs at %L cannot have an initializer",
12642 sym
->name
, &sym
->declared_at
);
12644 /* Make sure no second error is issued for this. */
12645 sym
->value
->error
= 1;
12649 /* An external symbol may not have an initializer because it is taken to be
12650 a procedure. Exception: Procedure Pointers. */
12651 if (sym
->attr
.external
&& sym
->value
&& !sym
->attr
.proc_pointer
)
12653 gfc_error ("External object %qs at %L may not have an initializer",
12654 sym
->name
, &sym
->declared_at
);
12658 /* An elemental function is required to return a scalar 12.7.1 */
12659 if (sym
->attr
.elemental
&& sym
->attr
.function
12660 && (sym
->as
|| (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
)->as
)))
12662 gfc_error ("ELEMENTAL function %qs at %L must have a scalar "
12663 "result", sym
->name
, &sym
->declared_at
);
12664 /* Reset so that the error only occurs once. */
12665 sym
->attr
.elemental
= 0;
12669 if (sym
->attr
.proc
== PROC_ST_FUNCTION
12670 && (sym
->attr
.allocatable
|| sym
->attr
.pointer
))
12672 gfc_error ("Statement function %qs at %L may not have pointer or "
12673 "allocatable attribute", sym
->name
, &sym
->declared_at
);
12677 /* 5.1.1.5 of the Standard: A function name declared with an asterisk
12678 char-len-param shall not be array-valued, pointer-valued, recursive
12679 or pure. ....snip... A character value of * may only be used in the
12680 following ways: (i) Dummy arg of procedure - dummy associates with
12681 actual length; (ii) To declare a named constant; or (iii) External
12682 function - but length must be declared in calling scoping unit. */
12683 if (sym
->attr
.function
12684 && sym
->ts
.type
== BT_CHARACTER
&& !sym
->ts
.deferred
12685 && sym
->ts
.u
.cl
&& sym
->ts
.u
.cl
->length
== NULL
)
12687 if ((sym
->as
&& sym
->as
->rank
) || (sym
->attr
.pointer
)
12688 || (sym
->attr
.recursive
) || (sym
->attr
.pure
))
12690 if (sym
->as
&& sym
->as
->rank
)
12691 gfc_error ("CHARACTER(*) function %qs at %L cannot be "
12692 "array-valued", sym
->name
, &sym
->declared_at
);
12694 if (sym
->attr
.pointer
)
12695 gfc_error ("CHARACTER(*) function %qs at %L cannot be "
12696 "pointer-valued", sym
->name
, &sym
->declared_at
);
12698 if (sym
->attr
.pure
)
12699 gfc_error ("CHARACTER(*) function %qs at %L cannot be "
12700 "pure", sym
->name
, &sym
->declared_at
);
12702 if (sym
->attr
.recursive
)
12703 gfc_error ("CHARACTER(*) function %qs at %L cannot be "
12704 "recursive", sym
->name
, &sym
->declared_at
);
12709 /* Appendix B.2 of the standard. Contained functions give an
12710 error anyway. Deferred character length is an F2003 feature.
12711 Don't warn on intrinsic conversion functions, which start
12712 with two underscores. */
12713 if (!sym
->attr
.contained
&& !sym
->ts
.deferred
12714 && (sym
->name
[0] != '_' || sym
->name
[1] != '_'))
12715 gfc_notify_std (GFC_STD_F95_OBS
,
12716 "CHARACTER(*) function %qs at %L",
12717 sym
->name
, &sym
->declared_at
);
12720 /* F2008, C1218. */
12721 if (sym
->attr
.elemental
)
12723 if (sym
->attr
.proc_pointer
)
12725 gfc_error ("Procedure pointer %qs at %L shall not be elemental",
12726 sym
->name
, &sym
->declared_at
);
12729 if (sym
->attr
.dummy
)
12731 gfc_error ("Dummy procedure %qs at %L shall not be elemental",
12732 sym
->name
, &sym
->declared_at
);
12737 /* F2018, C15100: "The result of an elemental function shall be scalar,
12738 and shall not have the POINTER or ALLOCATABLE attribute." The scalar
12739 pointer is tested and caught elsewhere. */
12740 if (sym
->attr
.elemental
&& sym
->result
12741 && (sym
->result
->attr
.allocatable
|| sym
->result
->attr
.pointer
))
12743 gfc_error ("Function result variable %qs at %L of elemental "
12744 "function %qs shall not have an ALLOCATABLE or POINTER "
12745 "attribute", sym
->result
->name
,
12746 &sym
->result
->declared_at
, sym
->name
);
12750 if (sym
->attr
.is_bind_c
&& sym
->attr
.is_c_interop
!= 1)
12752 gfc_formal_arglist
*curr_arg
;
12753 int has_non_interop_arg
= 0;
12755 if (!verify_bind_c_sym (sym
, &(sym
->ts
), sym
->attr
.in_common
,
12756 sym
->common_block
))
12758 /* Clear these to prevent looking at them again if there was an
12760 sym
->attr
.is_bind_c
= 0;
12761 sym
->attr
.is_c_interop
= 0;
12762 sym
->ts
.is_c_interop
= 0;
12766 /* So far, no errors have been found. */
12767 sym
->attr
.is_c_interop
= 1;
12768 sym
->ts
.is_c_interop
= 1;
12771 curr_arg
= gfc_sym_get_dummy_args (sym
);
12772 while (curr_arg
!= NULL
)
12774 /* Skip implicitly typed dummy args here. */
12775 if (curr_arg
->sym
&& curr_arg
->sym
->attr
.implicit_type
== 0)
12776 if (!gfc_verify_c_interop_param (curr_arg
->sym
))
12777 /* If something is found to fail, record the fact so we
12778 can mark the symbol for the procedure as not being
12779 BIND(C) to try and prevent multiple errors being
12781 has_non_interop_arg
= 1;
12783 curr_arg
= curr_arg
->next
;
12786 /* See if any of the arguments were not interoperable and if so, clear
12787 the procedure symbol to prevent duplicate error messages. */
12788 if (has_non_interop_arg
!= 0)
12790 sym
->attr
.is_c_interop
= 0;
12791 sym
->ts
.is_c_interop
= 0;
12792 sym
->attr
.is_bind_c
= 0;
12796 if (!sym
->attr
.proc_pointer
)
12798 if (sym
->attr
.save
== SAVE_EXPLICIT
)
12800 gfc_error ("PROCEDURE attribute conflicts with SAVE attribute "
12801 "in %qs at %L", sym
->name
, &sym
->declared_at
);
12804 if (sym
->attr
.intent
)
12806 gfc_error ("PROCEDURE attribute conflicts with INTENT attribute "
12807 "in %qs at %L", sym
->name
, &sym
->declared_at
);
12810 if (sym
->attr
.subroutine
&& sym
->attr
.result
)
12812 gfc_error ("PROCEDURE attribute conflicts with RESULT attribute "
12813 "in %qs at %L", sym
->name
, &sym
->declared_at
);
12816 if (sym
->attr
.external
&& sym
->attr
.function
&& !sym
->attr
.module_procedure
12817 && ((sym
->attr
.if_source
== IFSRC_DECL
&& !sym
->attr
.procedure
)
12818 || sym
->attr
.contained
))
12820 gfc_error ("EXTERNAL attribute conflicts with FUNCTION attribute "
12821 "in %qs at %L", sym
->name
, &sym
->declared_at
);
12824 if (strcmp ("ppr@", sym
->name
) == 0)
12826 gfc_error ("Procedure pointer result %qs at %L "
12827 "is missing the pointer attribute",
12828 sym
->ns
->proc_name
->name
, &sym
->declared_at
);
12833 /* Assume that a procedure whose body is not known has references
12834 to external arrays. */
12835 if (sym
->attr
.if_source
!= IFSRC_DECL
)
12836 sym
->attr
.array_outer_dependency
= 1;
12838 /* Compare the characteristics of a module procedure with the
12839 interface declaration. Ideally this would be done with
12840 gfc_compare_interfaces but, at present, the formal interface
12841 cannot be copied to the ts.interface. */
12842 if (sym
->attr
.module_procedure
12843 && sym
->attr
.if_source
== IFSRC_DECL
)
12846 char name
[2*GFC_MAX_SYMBOL_LEN
+ 1];
12848 char *submodule_name
;
12849 strcpy (name
, sym
->ns
->proc_name
->name
);
12850 module_name
= strtok (name
, ".");
12851 submodule_name
= strtok (NULL
, ".");
12853 iface
= sym
->tlink
;
12856 /* Make sure that the result uses the correct charlen for deferred
12858 if (iface
&& sym
->result
12859 && iface
->ts
.type
== BT_CHARACTER
12860 && iface
->ts
.deferred
)
12861 sym
->result
->ts
.u
.cl
= iface
->ts
.u
.cl
;
12866 /* Check the procedure characteristics. */
12867 if (sym
->attr
.elemental
!= iface
->attr
.elemental
)
12869 gfc_error ("Mismatch in ELEMENTAL attribute between MODULE "
12870 "PROCEDURE at %L and its interface in %s",
12871 &sym
->declared_at
, module_name
);
12875 if (sym
->attr
.pure
!= iface
->attr
.pure
)
12877 gfc_error ("Mismatch in PURE attribute between MODULE "
12878 "PROCEDURE at %L and its interface in %s",
12879 &sym
->declared_at
, module_name
);
12883 if (sym
->attr
.recursive
!= iface
->attr
.recursive
)
12885 gfc_error ("Mismatch in RECURSIVE attribute between MODULE "
12886 "PROCEDURE at %L and its interface in %s",
12887 &sym
->declared_at
, module_name
);
12891 /* Check the result characteristics. */
12892 if (!gfc_check_result_characteristics (sym
, iface
, errmsg
, 200))
12894 gfc_error ("%s between the MODULE PROCEDURE declaration "
12895 "in MODULE %qs and the declaration at %L in "
12897 errmsg
, module_name
, &sym
->declared_at
,
12898 submodule_name
? submodule_name
: module_name
);
12903 /* Check the characteristics of the formal arguments. */
12904 if (sym
->formal
&& sym
->formal_ns
)
12906 for (arg
= sym
->formal
; arg
&& arg
->sym
; arg
= arg
->next
)
12909 gfc_traverse_ns (sym
->formal_ns
, compare_fsyms
);
12917 /* Resolve a list of finalizer procedures. That is, after they have hopefully
12918 been defined and we now know their defined arguments, check that they fulfill
12919 the requirements of the standard for procedures used as finalizers. */
12922 gfc_resolve_finalizers (gfc_symbol
* derived
, bool *finalizable
)
12924 gfc_finalizer
* list
;
12925 gfc_finalizer
** prev_link
; /* For removing wrong entries from the list. */
12926 bool result
= true;
12927 bool seen_scalar
= false;
12930 gfc_symbol
*parent
= gfc_get_derived_super_type (derived
);
12933 gfc_resolve_finalizers (parent
, finalizable
);
12935 /* Ensure that derived-type components have a their finalizers resolved. */
12936 bool has_final
= derived
->f2k_derived
&& derived
->f2k_derived
->finalizers
;
12937 for (c
= derived
->components
; c
; c
= c
->next
)
12938 if (c
->ts
.type
== BT_DERIVED
12939 && !c
->attr
.pointer
&& !c
->attr
.proc_pointer
&& !c
->attr
.allocatable
)
12941 bool has_final2
= false;
12942 if (!gfc_resolve_finalizers (c
->ts
.u
.derived
, &has_final2
))
12943 return false; /* Error. */
12944 has_final
= has_final
|| has_final2
;
12946 /* Return early if not finalizable. */
12950 *finalizable
= false;
12954 /* Walk over the list of finalizer-procedures, check them, and if any one
12955 does not fit in with the standard's definition, print an error and remove
12956 it from the list. */
12957 prev_link
= &derived
->f2k_derived
->finalizers
;
12958 for (list
= derived
->f2k_derived
->finalizers
; list
; list
= *prev_link
)
12960 gfc_formal_arglist
*dummy_args
;
12965 /* Skip this finalizer if we already resolved it. */
12966 if (list
->proc_tree
)
12968 if (list
->proc_tree
->n
.sym
->formal
->sym
->as
== NULL
12969 || list
->proc_tree
->n
.sym
->formal
->sym
->as
->rank
== 0)
12970 seen_scalar
= true;
12971 prev_link
= &(list
->next
);
12975 /* Check this exists and is a SUBROUTINE. */
12976 if (!list
->proc_sym
->attr
.subroutine
)
12978 gfc_error ("FINAL procedure %qs at %L is not a SUBROUTINE",
12979 list
->proc_sym
->name
, &list
->where
);
12983 /* We should have exactly one argument. */
12984 dummy_args
= gfc_sym_get_dummy_args (list
->proc_sym
);
12985 if (!dummy_args
|| dummy_args
->next
)
12987 gfc_error ("FINAL procedure at %L must have exactly one argument",
12991 arg
= dummy_args
->sym
;
12993 /* This argument must be of our type. */
12994 if (arg
->ts
.type
!= BT_DERIVED
|| arg
->ts
.u
.derived
!= derived
)
12996 gfc_error ("Argument of FINAL procedure at %L must be of type %qs",
12997 &arg
->declared_at
, derived
->name
);
13001 /* It must neither be a pointer nor allocatable nor optional. */
13002 if (arg
->attr
.pointer
)
13004 gfc_error ("Argument of FINAL procedure at %L must not be a POINTER",
13005 &arg
->declared_at
);
13008 if (arg
->attr
.allocatable
)
13010 gfc_error ("Argument of FINAL procedure at %L must not be"
13011 " ALLOCATABLE", &arg
->declared_at
);
13014 if (arg
->attr
.optional
)
13016 gfc_error ("Argument of FINAL procedure at %L must not be OPTIONAL",
13017 &arg
->declared_at
);
13021 /* It must not be INTENT(OUT). */
13022 if (arg
->attr
.intent
== INTENT_OUT
)
13024 gfc_error ("Argument of FINAL procedure at %L must not be"
13025 " INTENT(OUT)", &arg
->declared_at
);
13029 /* Warn if the procedure is non-scalar and not assumed shape. */
13030 if (warn_surprising
&& arg
->as
&& arg
->as
->rank
!= 0
13031 && arg
->as
->type
!= AS_ASSUMED_SHAPE
)
13032 gfc_warning (OPT_Wsurprising
,
13033 "Non-scalar FINAL procedure at %L should have assumed"
13034 " shape argument", &arg
->declared_at
);
13036 /* Check that it does not match in kind and rank with a FINAL procedure
13037 defined earlier. To really loop over the *earlier* declarations,
13038 we need to walk the tail of the list as new ones were pushed at the
13040 /* TODO: Handle kind parameters once they are implemented. */
13041 my_rank
= (arg
->as
? arg
->as
->rank
: 0);
13042 for (i
= list
->next
; i
; i
= i
->next
)
13044 gfc_formal_arglist
*dummy_args
;
13046 /* Argument list might be empty; that is an error signalled earlier,
13047 but we nevertheless continued resolving. */
13048 dummy_args
= gfc_sym_get_dummy_args (i
->proc_sym
);
13051 gfc_symbol
* i_arg
= dummy_args
->sym
;
13052 const int i_rank
= (i_arg
->as
? i_arg
->as
->rank
: 0);
13053 if (i_rank
== my_rank
)
13055 gfc_error ("FINAL procedure %qs declared at %L has the same"
13056 " rank (%d) as %qs",
13057 list
->proc_sym
->name
, &list
->where
, my_rank
,
13058 i
->proc_sym
->name
);
13064 /* Is this the/a scalar finalizer procedure? */
13066 seen_scalar
= true;
13068 /* Find the symtree for this procedure. */
13069 gcc_assert (!list
->proc_tree
);
13070 list
->proc_tree
= gfc_find_sym_in_symtree (list
->proc_sym
);
13072 prev_link
= &list
->next
;
13075 /* Remove wrong nodes immediately from the list so we don't risk any
13076 troubles in the future when they might fail later expectations. */
13079 *prev_link
= list
->next
;
13080 gfc_free_finalizer (i
);
13084 if (result
== false)
13087 /* Warn if we haven't seen a scalar finalizer procedure (but we know there
13088 were nodes in the list, must have been for arrays. It is surely a good
13089 idea to have a scalar version there if there's something to finalize. */
13090 if (warn_surprising
&& derived
->f2k_derived
->finalizers
&& !seen_scalar
)
13091 gfc_warning (OPT_Wsurprising
,
13092 "Only array FINAL procedures declared for derived type %qs"
13093 " defined at %L, suggest also scalar one",
13094 derived
->name
, &derived
->declared_at
);
13096 vtab
= gfc_find_derived_vtab (derived
);
13097 c
= vtab
->ts
.u
.derived
->components
->next
->next
->next
->next
->next
;
13098 gfc_set_sym_referenced (c
->initializer
->symtree
->n
.sym
);
13101 *finalizable
= true;
13107 /* Check if two GENERIC targets are ambiguous and emit an error is they are. */
13110 check_generic_tbp_ambiguity (gfc_tbp_generic
* t1
, gfc_tbp_generic
* t2
,
13111 const char* generic_name
, locus where
)
13113 gfc_symbol
*sym1
, *sym2
;
13114 const char *pass1
, *pass2
;
13115 gfc_formal_arglist
*dummy_args
;
13117 gcc_assert (t1
->specific
&& t2
->specific
);
13118 gcc_assert (!t1
->specific
->is_generic
);
13119 gcc_assert (!t2
->specific
->is_generic
);
13120 gcc_assert (t1
->is_operator
== t2
->is_operator
);
13122 sym1
= t1
->specific
->u
.specific
->n
.sym
;
13123 sym2
= t2
->specific
->u
.specific
->n
.sym
;
13128 /* Both must be SUBROUTINEs or both must be FUNCTIONs. */
13129 if (sym1
->attr
.subroutine
!= sym2
->attr
.subroutine
13130 || sym1
->attr
.function
!= sym2
->attr
.function
)
13132 gfc_error ("%qs and %qs cannot be mixed FUNCTION/SUBROUTINE for"
13133 " GENERIC %qs at %L",
13134 sym1
->name
, sym2
->name
, generic_name
, &where
);
13138 /* Determine PASS arguments. */
13139 if (t1
->specific
->nopass
)
13141 else if (t1
->specific
->pass_arg
)
13142 pass1
= t1
->specific
->pass_arg
;
13145 dummy_args
= gfc_sym_get_dummy_args (t1
->specific
->u
.specific
->n
.sym
);
13147 pass1
= dummy_args
->sym
->name
;
13151 if (t2
->specific
->nopass
)
13153 else if (t2
->specific
->pass_arg
)
13154 pass2
= t2
->specific
->pass_arg
;
13157 dummy_args
= gfc_sym_get_dummy_args (t2
->specific
->u
.specific
->n
.sym
);
13159 pass2
= dummy_args
->sym
->name
;
13164 /* Compare the interfaces. */
13165 if (gfc_compare_interfaces (sym1
, sym2
, sym2
->name
, !t1
->is_operator
, 0,
13166 NULL
, 0, pass1
, pass2
))
13168 gfc_error ("%qs and %qs for GENERIC %qs at %L are ambiguous",
13169 sym1
->name
, sym2
->name
, generic_name
, &where
);
13177 /* Worker function for resolving a generic procedure binding; this is used to
13178 resolve GENERIC as well as user and intrinsic OPERATOR typebound procedures.
13180 The difference between those cases is finding possible inherited bindings
13181 that are overridden, as one has to look for them in tb_sym_root,
13182 tb_uop_root or tb_op, respectively. Thus the caller must already find
13183 the super-type and set p->overridden correctly. */
13186 resolve_tb_generic_targets (gfc_symbol
* super_type
,
13187 gfc_typebound_proc
* p
, const char* name
)
13189 gfc_tbp_generic
* target
;
13190 gfc_symtree
* first_target
;
13191 gfc_symtree
* inherited
;
13193 gcc_assert (p
&& p
->is_generic
);
13195 /* Try to find the specific bindings for the symtrees in our target-list. */
13196 gcc_assert (p
->u
.generic
);
13197 for (target
= p
->u
.generic
; target
; target
= target
->next
)
13198 if (!target
->specific
)
13200 gfc_typebound_proc
* overridden_tbp
;
13201 gfc_tbp_generic
* g
;
13202 const char* target_name
;
13204 target_name
= target
->specific_st
->name
;
13206 /* Defined for this type directly. */
13207 if (target
->specific_st
->n
.tb
&& !target
->specific_st
->n
.tb
->error
)
13209 target
->specific
= target
->specific_st
->n
.tb
;
13210 goto specific_found
;
13213 /* Look for an inherited specific binding. */
13216 inherited
= gfc_find_typebound_proc (super_type
, NULL
, target_name
,
13221 gcc_assert (inherited
->n
.tb
);
13222 target
->specific
= inherited
->n
.tb
;
13223 goto specific_found
;
13227 gfc_error ("Undefined specific binding %qs as target of GENERIC %qs"
13228 " at %L", target_name
, name
, &p
->where
);
13231 /* Once we've found the specific binding, check it is not ambiguous with
13232 other specifics already found or inherited for the same GENERIC. */
13234 gcc_assert (target
->specific
);
13236 /* This must really be a specific binding! */
13237 if (target
->specific
->is_generic
)
13239 gfc_error ("GENERIC %qs at %L must target a specific binding,"
13240 " %qs is GENERIC, too", name
, &p
->where
, target_name
);
13244 /* Check those already resolved on this type directly. */
13245 for (g
= p
->u
.generic
; g
; g
= g
->next
)
13246 if (g
!= target
&& g
->specific
13247 && !check_generic_tbp_ambiguity (target
, g
, name
, p
->where
))
13250 /* Check for ambiguity with inherited specific targets. */
13251 for (overridden_tbp
= p
->overridden
; overridden_tbp
;
13252 overridden_tbp
= overridden_tbp
->overridden
)
13253 if (overridden_tbp
->is_generic
)
13255 for (g
= overridden_tbp
->u
.generic
; g
; g
= g
->next
)
13257 gcc_assert (g
->specific
);
13258 if (!check_generic_tbp_ambiguity (target
, g
, name
, p
->where
))
13264 /* If we attempt to "overwrite" a specific binding, this is an error. */
13265 if (p
->overridden
&& !p
->overridden
->is_generic
)
13267 gfc_error ("GENERIC %qs at %L cannot overwrite specific binding with"
13268 " the same name", name
, &p
->where
);
13272 /* Take the SUBROUTINE/FUNCTION attributes of the first specific target, as
13273 all must have the same attributes here. */
13274 first_target
= p
->u
.generic
->specific
->u
.specific
;
13275 gcc_assert (first_target
);
13276 p
->subroutine
= first_target
->n
.sym
->attr
.subroutine
;
13277 p
->function
= first_target
->n
.sym
->attr
.function
;
13283 /* Resolve a GENERIC procedure binding for a derived type. */
13286 resolve_typebound_generic (gfc_symbol
* derived
, gfc_symtree
* st
)
13288 gfc_symbol
* super_type
;
13290 /* Find the overridden binding if any. */
13291 st
->n
.tb
->overridden
= NULL
;
13292 super_type
= gfc_get_derived_super_type (derived
);
13295 gfc_symtree
* overridden
;
13296 overridden
= gfc_find_typebound_proc (super_type
, NULL
, st
->name
,
13299 if (overridden
&& overridden
->n
.tb
)
13300 st
->n
.tb
->overridden
= overridden
->n
.tb
;
13303 /* Resolve using worker function. */
13304 return resolve_tb_generic_targets (super_type
, st
->n
.tb
, st
->name
);
13308 /* Retrieve the target-procedure of an operator binding and do some checks in
13309 common for intrinsic and user-defined type-bound operators. */
13312 get_checked_tb_operator_target (gfc_tbp_generic
* target
, locus where
)
13314 gfc_symbol
* target_proc
;
13316 gcc_assert (target
->specific
&& !target
->specific
->is_generic
);
13317 target_proc
= target
->specific
->u
.specific
->n
.sym
;
13318 gcc_assert (target_proc
);
13320 /* F08:C468. All operator bindings must have a passed-object dummy argument. */
13321 if (target
->specific
->nopass
)
13323 gfc_error ("Type-bound operator at %L cannot be NOPASS", &where
);
13327 return target_proc
;
13331 /* Resolve a type-bound intrinsic operator. */
13334 resolve_typebound_intrinsic_op (gfc_symbol
* derived
, gfc_intrinsic_op op
,
13335 gfc_typebound_proc
* p
)
13337 gfc_symbol
* super_type
;
13338 gfc_tbp_generic
* target
;
13340 /* If there's already an error here, do nothing (but don't fail again). */
13344 /* Operators should always be GENERIC bindings. */
13345 gcc_assert (p
->is_generic
);
13347 /* Look for an overridden binding. */
13348 super_type
= gfc_get_derived_super_type (derived
);
13349 if (super_type
&& super_type
->f2k_derived
)
13350 p
->overridden
= gfc_find_typebound_intrinsic_op (super_type
, NULL
,
13353 p
->overridden
= NULL
;
13355 /* Resolve general GENERIC properties using worker function. */
13356 if (!resolve_tb_generic_targets (super_type
, p
, gfc_op2string(op
)))
13359 /* Check the targets to be procedures of correct interface. */
13360 for (target
= p
->u
.generic
; target
; target
= target
->next
)
13362 gfc_symbol
* target_proc
;
13364 target_proc
= get_checked_tb_operator_target (target
, p
->where
);
13368 if (!gfc_check_operator_interface (target_proc
, op
, p
->where
))
13371 /* Add target to non-typebound operator list. */
13372 if (!target
->specific
->deferred
&& !derived
->attr
.use_assoc
13373 && p
->access
!= ACCESS_PRIVATE
&& derived
->ns
== gfc_current_ns
)
13375 gfc_interface
*head
, *intr
;
13377 /* Preempt 'gfc_check_new_interface' for submodules, where the
13378 mechanism for handling module procedures winds up resolving
13379 operator interfaces twice and would otherwise cause an error. */
13380 for (intr
= derived
->ns
->op
[op
]; intr
; intr
= intr
->next
)
13381 if (intr
->sym
== target_proc
13382 && target_proc
->attr
.used_in_submodule
)
13385 if (!gfc_check_new_interface (derived
->ns
->op
[op
],
13386 target_proc
, p
->where
))
13388 head
= derived
->ns
->op
[op
];
13389 intr
= gfc_get_interface ();
13390 intr
->sym
= target_proc
;
13391 intr
->where
= p
->where
;
13393 derived
->ns
->op
[op
] = intr
;
13405 /* Resolve a type-bound user operator (tree-walker callback). */
13407 static gfc_symbol
* resolve_bindings_derived
;
13408 static bool resolve_bindings_result
;
13410 static bool check_uop_procedure (gfc_symbol
* sym
, locus where
);
13413 resolve_typebound_user_op (gfc_symtree
* stree
)
13415 gfc_symbol
* super_type
;
13416 gfc_tbp_generic
* target
;
13418 gcc_assert (stree
&& stree
->n
.tb
);
13420 if (stree
->n
.tb
->error
)
13423 /* Operators should always be GENERIC bindings. */
13424 gcc_assert (stree
->n
.tb
->is_generic
);
13426 /* Find overridden procedure, if any. */
13427 super_type
= gfc_get_derived_super_type (resolve_bindings_derived
);
13428 if (super_type
&& super_type
->f2k_derived
)
13430 gfc_symtree
* overridden
;
13431 overridden
= gfc_find_typebound_user_op (super_type
, NULL
,
13432 stree
->name
, true, NULL
);
13434 if (overridden
&& overridden
->n
.tb
)
13435 stree
->n
.tb
->overridden
= overridden
->n
.tb
;
13438 stree
->n
.tb
->overridden
= NULL
;
13440 /* Resolve basically using worker function. */
13441 if (!resolve_tb_generic_targets (super_type
, stree
->n
.tb
, stree
->name
))
13444 /* Check the targets to be functions of correct interface. */
13445 for (target
= stree
->n
.tb
->u
.generic
; target
; target
= target
->next
)
13447 gfc_symbol
* target_proc
;
13449 target_proc
= get_checked_tb_operator_target (target
, stree
->n
.tb
->where
);
13453 if (!check_uop_procedure (target_proc
, stree
->n
.tb
->where
))
13460 resolve_bindings_result
= false;
13461 stree
->n
.tb
->error
= 1;
13465 /* Resolve the type-bound procedures for a derived type. */
13468 resolve_typebound_procedure (gfc_symtree
* stree
)
13472 gfc_symbol
* me_arg
;
13473 gfc_symbol
* super_type
;
13474 gfc_component
* comp
;
13476 gcc_assert (stree
);
13478 /* Undefined specific symbol from GENERIC target definition. */
13482 if (stree
->n
.tb
->error
)
13485 /* If this is a GENERIC binding, use that routine. */
13486 if (stree
->n
.tb
->is_generic
)
13488 if (!resolve_typebound_generic (resolve_bindings_derived
, stree
))
13493 /* Get the target-procedure to check it. */
13494 gcc_assert (!stree
->n
.tb
->is_generic
);
13495 gcc_assert (stree
->n
.tb
->u
.specific
);
13496 proc
= stree
->n
.tb
->u
.specific
->n
.sym
;
13497 where
= stree
->n
.tb
->where
;
13499 /* Default access should already be resolved from the parser. */
13500 gcc_assert (stree
->n
.tb
->access
!= ACCESS_UNKNOWN
);
13502 if (stree
->n
.tb
->deferred
)
13504 if (!check_proc_interface (proc
, &where
))
13509 /* Check for F08:C465. */
13510 if ((!proc
->attr
.subroutine
&& !proc
->attr
.function
)
13511 || (proc
->attr
.proc
!= PROC_MODULE
13512 && proc
->attr
.if_source
!= IFSRC_IFBODY
)
13513 || proc
->attr
.abstract
)
13515 gfc_error ("%qs must be a module procedure or an external procedure with"
13516 " an explicit interface at %L", proc
->name
, &where
);
13521 stree
->n
.tb
->subroutine
= proc
->attr
.subroutine
;
13522 stree
->n
.tb
->function
= proc
->attr
.function
;
13524 /* Find the super-type of the current derived type. We could do this once and
13525 store in a global if speed is needed, but as long as not I believe this is
13526 more readable and clearer. */
13527 super_type
= gfc_get_derived_super_type (resolve_bindings_derived
);
13529 /* If PASS, resolve and check arguments if not already resolved / loaded
13530 from a .mod file. */
13531 if (!stree
->n
.tb
->nopass
&& stree
->n
.tb
->pass_arg_num
== 0)
13533 gfc_formal_arglist
*dummy_args
;
13535 dummy_args
= gfc_sym_get_dummy_args (proc
);
13536 if (stree
->n
.tb
->pass_arg
)
13538 gfc_formal_arglist
*i
;
13540 /* If an explicit passing argument name is given, walk the arg-list
13541 and look for it. */
13544 stree
->n
.tb
->pass_arg_num
= 1;
13545 for (i
= dummy_args
; i
; i
= i
->next
)
13547 if (!strcmp (i
->sym
->name
, stree
->n
.tb
->pass_arg
))
13552 ++stree
->n
.tb
->pass_arg_num
;
13557 gfc_error ("Procedure %qs with PASS(%s) at %L has no"
13559 proc
->name
, stree
->n
.tb
->pass_arg
, &where
,
13560 stree
->n
.tb
->pass_arg
);
13566 /* Otherwise, take the first one; there should in fact be at least
13568 stree
->n
.tb
->pass_arg_num
= 1;
13571 gfc_error ("Procedure %qs with PASS at %L must have at"
13572 " least one argument", proc
->name
, &where
);
13575 me_arg
= dummy_args
->sym
;
13578 /* Now check that the argument-type matches and the passed-object
13579 dummy argument is generally fine. */
13581 gcc_assert (me_arg
);
13583 if (me_arg
->ts
.type
!= BT_CLASS
)
13585 gfc_error ("Non-polymorphic passed-object dummy argument of %qs"
13586 " at %L", proc
->name
, &where
);
13590 if (CLASS_DATA (me_arg
)->ts
.u
.derived
13591 != resolve_bindings_derived
)
13593 gfc_error ("Argument %qs of %qs with PASS(%s) at %L must be of"
13594 " the derived-type %qs", me_arg
->name
, proc
->name
,
13595 me_arg
->name
, &where
, resolve_bindings_derived
->name
);
13599 gcc_assert (me_arg
->ts
.type
== BT_CLASS
);
13600 if (CLASS_DATA (me_arg
)->as
&& CLASS_DATA (me_arg
)->as
->rank
!= 0)
13602 gfc_error ("Passed-object dummy argument of %qs at %L must be"
13603 " scalar", proc
->name
, &where
);
13606 if (CLASS_DATA (me_arg
)->attr
.allocatable
)
13608 gfc_error ("Passed-object dummy argument of %qs at %L must not"
13609 " be ALLOCATABLE", proc
->name
, &where
);
13612 if (CLASS_DATA (me_arg
)->attr
.class_pointer
)
13614 gfc_error ("Passed-object dummy argument of %qs at %L must not"
13615 " be POINTER", proc
->name
, &where
);
13620 /* If we are extending some type, check that we don't override a procedure
13621 flagged NON_OVERRIDABLE. */
13622 stree
->n
.tb
->overridden
= NULL
;
13625 gfc_symtree
* overridden
;
13626 overridden
= gfc_find_typebound_proc (super_type
, NULL
,
13627 stree
->name
, true, NULL
);
13631 if (overridden
->n
.tb
)
13632 stree
->n
.tb
->overridden
= overridden
->n
.tb
;
13634 if (!gfc_check_typebound_override (stree
, overridden
))
13639 /* See if there's a name collision with a component directly in this type. */
13640 for (comp
= resolve_bindings_derived
->components
; comp
; comp
= comp
->next
)
13641 if (!strcmp (comp
->name
, stree
->name
))
13643 gfc_error ("Procedure %qs at %L has the same name as a component of"
13645 stree
->name
, &where
, resolve_bindings_derived
->name
);
13649 /* Try to find a name collision with an inherited component. */
13650 if (super_type
&& gfc_find_component (super_type
, stree
->name
, true, true,
13653 gfc_error ("Procedure %qs at %L has the same name as an inherited"
13654 " component of %qs",
13655 stree
->name
, &where
, resolve_bindings_derived
->name
);
13659 stree
->n
.tb
->error
= 0;
13663 resolve_bindings_result
= false;
13664 stree
->n
.tb
->error
= 1;
13669 resolve_typebound_procedures (gfc_symbol
* derived
)
13672 gfc_symbol
* super_type
;
13674 if (!derived
->f2k_derived
|| !derived
->f2k_derived
->tb_sym_root
)
13677 super_type
= gfc_get_derived_super_type (derived
);
13679 resolve_symbol (super_type
);
13681 resolve_bindings_derived
= derived
;
13682 resolve_bindings_result
= true;
13684 if (derived
->f2k_derived
->tb_sym_root
)
13685 gfc_traverse_symtree (derived
->f2k_derived
->tb_sym_root
,
13686 &resolve_typebound_procedure
);
13688 if (derived
->f2k_derived
->tb_uop_root
)
13689 gfc_traverse_symtree (derived
->f2k_derived
->tb_uop_root
,
13690 &resolve_typebound_user_op
);
13692 for (op
= 0; op
!= GFC_INTRINSIC_OPS
; ++op
)
13694 gfc_typebound_proc
* p
= derived
->f2k_derived
->tb_op
[op
];
13695 if (p
&& !resolve_typebound_intrinsic_op (derived
,
13696 (gfc_intrinsic_op
)op
, p
))
13697 resolve_bindings_result
= false;
13700 return resolve_bindings_result
;
13704 /* Add a derived type to the dt_list. The dt_list is used in trans-types.c
13705 to give all identical derived types the same backend_decl. */
13707 add_dt_to_dt_list (gfc_symbol
*derived
)
13709 if (!derived
->dt_next
)
13711 if (gfc_derived_types
)
13713 derived
->dt_next
= gfc_derived_types
->dt_next
;
13714 gfc_derived_types
->dt_next
= derived
;
13718 derived
->dt_next
= derived
;
13720 gfc_derived_types
= derived
;
13725 /* Ensure that a derived-type is really not abstract, meaning that every
13726 inherited DEFERRED binding is overridden by a non-DEFERRED one. */
13729 ensure_not_abstract_walker (gfc_symbol
* sub
, gfc_symtree
* st
)
13734 if (!ensure_not_abstract_walker (sub
, st
->left
))
13736 if (!ensure_not_abstract_walker (sub
, st
->right
))
13739 if (st
->n
.tb
&& st
->n
.tb
->deferred
)
13741 gfc_symtree
* overriding
;
13742 overriding
= gfc_find_typebound_proc (sub
, NULL
, st
->name
, true, NULL
);
13745 gcc_assert (overriding
->n
.tb
);
13746 if (overriding
->n
.tb
->deferred
)
13748 gfc_error ("Derived-type %qs declared at %L must be ABSTRACT because"
13749 " %qs is DEFERRED and not overridden",
13750 sub
->name
, &sub
->declared_at
, st
->name
);
13759 ensure_not_abstract (gfc_symbol
* sub
, gfc_symbol
* ancestor
)
13761 /* The algorithm used here is to recursively travel up the ancestry of sub
13762 and for each ancestor-type, check all bindings. If any of them is
13763 DEFERRED, look it up starting from sub and see if the found (overriding)
13764 binding is not DEFERRED.
13765 This is not the most efficient way to do this, but it should be ok and is
13766 clearer than something sophisticated. */
13768 gcc_assert (ancestor
&& !sub
->attr
.abstract
);
13770 if (!ancestor
->attr
.abstract
)
13773 /* Walk bindings of this ancestor. */
13774 if (ancestor
->f2k_derived
)
13777 t
= ensure_not_abstract_walker (sub
, ancestor
->f2k_derived
->tb_sym_root
);
13782 /* Find next ancestor type and recurse on it. */
13783 ancestor
= gfc_get_derived_super_type (ancestor
);
13785 return ensure_not_abstract (sub
, ancestor
);
13791 /* This check for typebound defined assignments is done recursively
13792 since the order in which derived types are resolved is not always in
13793 order of the declarations. */
13796 check_defined_assignments (gfc_symbol
*derived
)
13800 for (c
= derived
->components
; c
; c
= c
->next
)
13802 if (!gfc_bt_struct (c
->ts
.type
)
13804 || c
->attr
.allocatable
13805 || c
->attr
.proc_pointer_comp
13806 || c
->attr
.class_pointer
13807 || c
->attr
.proc_pointer
)
13810 if (c
->ts
.u
.derived
->attr
.defined_assign_comp
13811 || (c
->ts
.u
.derived
->f2k_derived
13812 && c
->ts
.u
.derived
->f2k_derived
->tb_op
[INTRINSIC_ASSIGN
]))
13814 derived
->attr
.defined_assign_comp
= 1;
13818 check_defined_assignments (c
->ts
.u
.derived
);
13819 if (c
->ts
.u
.derived
->attr
.defined_assign_comp
)
13821 derived
->attr
.defined_assign_comp
= 1;
13828 /* Resolve a single component of a derived type or structure. */
13831 resolve_component (gfc_component
*c
, gfc_symbol
*sym
)
13833 gfc_symbol
*super_type
;
13834 symbol_attribute
*attr
;
13836 if (c
->attr
.artificial
)
13839 /* Do not allow vtype components to be resolved in nameless namespaces
13840 such as block data because the procedure pointers will cause ICEs
13841 and vtables are not needed in these contexts. */
13842 if (sym
->attr
.vtype
&& sym
->attr
.use_assoc
13843 && sym
->ns
->proc_name
== NULL
)
13847 if ((!sym
->attr
.is_class
|| c
!= sym
->components
)
13848 && c
->attr
.codimension
13849 && (!c
->attr
.allocatable
|| (c
->as
&& c
->as
->type
!= AS_DEFERRED
)))
13851 gfc_error ("Coarray component %qs at %L must be allocatable with "
13852 "deferred shape", c
->name
, &c
->loc
);
13857 if (c
->attr
.codimension
&& c
->ts
.type
== BT_DERIVED
13858 && c
->ts
.u
.derived
->ts
.is_iso_c
)
13860 gfc_error ("Component %qs at %L of TYPE(C_PTR) or TYPE(C_FUNPTR) "
13861 "shall not be a coarray", c
->name
, &c
->loc
);
13866 if (gfc_bt_struct (c
->ts
.type
) && c
->ts
.u
.derived
->attr
.coarray_comp
13867 && (c
->attr
.codimension
|| c
->attr
.pointer
|| c
->attr
.dimension
13868 || c
->attr
.allocatable
))
13870 gfc_error ("Component %qs at %L with coarray component "
13871 "shall be a nonpointer, nonallocatable scalar",
13877 if (c
->ts
.type
== BT_CLASS
)
13879 if (CLASS_DATA (c
))
13881 attr
= &(CLASS_DATA (c
)->attr
);
13883 /* Fix up contiguous attribute. */
13884 if (c
->attr
.contiguous
)
13885 attr
->contiguous
= 1;
13893 if (attr
&& attr
->contiguous
&& (!attr
->dimension
|| !attr
->pointer
))
13895 gfc_error ("Component %qs at %L has the CONTIGUOUS attribute but "
13896 "is not an array pointer", c
->name
, &c
->loc
);
13900 /* F2003, 15.2.1 - length has to be one. */
13901 if (sym
->attr
.is_bind_c
&& c
->ts
.type
== BT_CHARACTER
13902 && (c
->ts
.u
.cl
== NULL
|| c
->ts
.u
.cl
->length
== NULL
13903 || !gfc_is_constant_expr (c
->ts
.u
.cl
->length
)
13904 || mpz_cmp_si (c
->ts
.u
.cl
->length
->value
.integer
, 1) != 0))
13906 gfc_error ("Component %qs of BIND(C) type at %L must have length one",
13911 if (c
->attr
.proc_pointer
&& c
->ts
.interface
)
13913 gfc_symbol
*ifc
= c
->ts
.interface
;
13915 if (!sym
->attr
.vtype
&& !check_proc_interface (ifc
, &c
->loc
))
13921 if (ifc
->attr
.if_source
|| ifc
->attr
.intrinsic
)
13923 /* Resolve interface and copy attributes. */
13924 if (ifc
->formal
&& !ifc
->formal_ns
)
13925 resolve_symbol (ifc
);
13926 if (ifc
->attr
.intrinsic
)
13927 gfc_resolve_intrinsic (ifc
, &ifc
->declared_at
);
13931 c
->ts
= ifc
->result
->ts
;
13932 c
->attr
.allocatable
= ifc
->result
->attr
.allocatable
;
13933 c
->attr
.pointer
= ifc
->result
->attr
.pointer
;
13934 c
->attr
.dimension
= ifc
->result
->attr
.dimension
;
13935 c
->as
= gfc_copy_array_spec (ifc
->result
->as
);
13936 c
->attr
.class_ok
= ifc
->result
->attr
.class_ok
;
13941 c
->attr
.allocatable
= ifc
->attr
.allocatable
;
13942 c
->attr
.pointer
= ifc
->attr
.pointer
;
13943 c
->attr
.dimension
= ifc
->attr
.dimension
;
13944 c
->as
= gfc_copy_array_spec (ifc
->as
);
13945 c
->attr
.class_ok
= ifc
->attr
.class_ok
;
13947 c
->ts
.interface
= ifc
;
13948 c
->attr
.function
= ifc
->attr
.function
;
13949 c
->attr
.subroutine
= ifc
->attr
.subroutine
;
13951 c
->attr
.pure
= ifc
->attr
.pure
;
13952 c
->attr
.elemental
= ifc
->attr
.elemental
;
13953 c
->attr
.recursive
= ifc
->attr
.recursive
;
13954 c
->attr
.always_explicit
= ifc
->attr
.always_explicit
;
13955 c
->attr
.ext_attr
|= ifc
->attr
.ext_attr
;
13956 /* Copy char length. */
13957 if (ifc
->ts
.type
== BT_CHARACTER
&& ifc
->ts
.u
.cl
)
13959 gfc_charlen
*cl
= gfc_new_charlen (sym
->ns
, ifc
->ts
.u
.cl
);
13960 if (cl
->length
&& !cl
->resolved
13961 && !gfc_resolve_expr (cl
->length
))
13970 else if (c
->attr
.proc_pointer
&& c
->ts
.type
== BT_UNKNOWN
)
13972 /* Since PPCs are not implicitly typed, a PPC without an explicit
13973 interface must be a subroutine. */
13974 gfc_add_subroutine (&c
->attr
, c
->name
, &c
->loc
);
13977 /* Procedure pointer components: Check PASS arg. */
13978 if (c
->attr
.proc_pointer
&& !c
->tb
->nopass
&& c
->tb
->pass_arg_num
== 0
13979 && !sym
->attr
.vtype
)
13981 gfc_symbol
* me_arg
;
13983 if (c
->tb
->pass_arg
)
13985 gfc_formal_arglist
* i
;
13987 /* If an explicit passing argument name is given, walk the arg-list
13988 and look for it. */
13991 c
->tb
->pass_arg_num
= 1;
13992 for (i
= c
->ts
.interface
->formal
; i
; i
= i
->next
)
13994 if (!strcmp (i
->sym
->name
, c
->tb
->pass_arg
))
13999 c
->tb
->pass_arg_num
++;
14004 gfc_error ("Procedure pointer component %qs with PASS(%s) "
14005 "at %L has no argument %qs", c
->name
,
14006 c
->tb
->pass_arg
, &c
->loc
, c
->tb
->pass_arg
);
14013 /* Otherwise, take the first one; there should in fact be at least
14015 c
->tb
->pass_arg_num
= 1;
14016 if (!c
->ts
.interface
->formal
)
14018 gfc_error ("Procedure pointer component %qs with PASS at %L "
14019 "must have at least one argument",
14024 me_arg
= c
->ts
.interface
->formal
->sym
;
14027 /* Now check that the argument-type matches. */
14028 gcc_assert (me_arg
);
14029 if ((me_arg
->ts
.type
!= BT_DERIVED
&& me_arg
->ts
.type
!= BT_CLASS
)
14030 || (me_arg
->ts
.type
== BT_DERIVED
&& me_arg
->ts
.u
.derived
!= sym
)
14031 || (me_arg
->ts
.type
== BT_CLASS
14032 && CLASS_DATA (me_arg
)->ts
.u
.derived
!= sym
))
14034 gfc_error ("Argument %qs of %qs with PASS(%s) at %L must be of"
14035 " the derived type %qs", me_arg
->name
, c
->name
,
14036 me_arg
->name
, &c
->loc
, sym
->name
);
14041 /* Check for F03:C453. */
14042 if (CLASS_DATA (me_arg
)->attr
.dimension
)
14044 gfc_error ("Argument %qs of %qs with PASS(%s) at %L "
14045 "must be scalar", me_arg
->name
, c
->name
, me_arg
->name
,
14051 if (CLASS_DATA (me_arg
)->attr
.class_pointer
)
14053 gfc_error ("Argument %qs of %qs with PASS(%s) at %L "
14054 "may not have the POINTER attribute", me_arg
->name
,
14055 c
->name
, me_arg
->name
, &c
->loc
);
14060 if (CLASS_DATA (me_arg
)->attr
.allocatable
)
14062 gfc_error ("Argument %qs of %qs with PASS(%s) at %L "
14063 "may not be ALLOCATABLE", me_arg
->name
, c
->name
,
14064 me_arg
->name
, &c
->loc
);
14069 if (gfc_type_is_extensible (sym
) && me_arg
->ts
.type
!= BT_CLASS
)
14071 gfc_error ("Non-polymorphic passed-object dummy argument of %qs"
14072 " at %L", c
->name
, &c
->loc
);
14078 /* Check type-spec if this is not the parent-type component. */
14079 if (((sym
->attr
.is_class
14080 && (!sym
->components
->ts
.u
.derived
->attr
.extension
14081 || c
!= sym
->components
->ts
.u
.derived
->components
))
14082 || (!sym
->attr
.is_class
14083 && (!sym
->attr
.extension
|| c
!= sym
->components
)))
14084 && !sym
->attr
.vtype
14085 && !resolve_typespec_used (&c
->ts
, &c
->loc
, c
->name
))
14088 super_type
= gfc_get_derived_super_type (sym
);
14090 /* If this type is an extension, set the accessibility of the parent
14093 && ((sym
->attr
.is_class
14094 && c
== sym
->components
->ts
.u
.derived
->components
)
14095 || (!sym
->attr
.is_class
&& c
== sym
->components
))
14096 && strcmp (super_type
->name
, c
->name
) == 0)
14097 c
->attr
.access
= super_type
->attr
.access
;
14099 /* If this type is an extension, see if this component has the same name
14100 as an inherited type-bound procedure. */
14101 if (super_type
&& !sym
->attr
.is_class
14102 && gfc_find_typebound_proc (super_type
, NULL
, c
->name
, true, NULL
))
14104 gfc_error ("Component %qs of %qs at %L has the same name as an"
14105 " inherited type-bound procedure",
14106 c
->name
, sym
->name
, &c
->loc
);
14110 if (c
->ts
.type
== BT_CHARACTER
&& !c
->attr
.proc_pointer
14111 && !c
->ts
.deferred
)
14113 if (c
->ts
.u
.cl
->length
== NULL
14114 || (!resolve_charlen(c
->ts
.u
.cl
))
14115 || !gfc_is_constant_expr (c
->ts
.u
.cl
->length
))
14117 gfc_error ("Character length of component %qs needs to "
14118 "be a constant specification expression at %L",
14120 c
->ts
.u
.cl
->length
? &c
->ts
.u
.cl
->length
->where
: &c
->loc
);
14125 if (c
->ts
.type
== BT_CHARACTER
&& c
->ts
.deferred
14126 && !c
->attr
.pointer
&& !c
->attr
.allocatable
)
14128 gfc_error ("Character component %qs of %qs at %L with deferred "
14129 "length must be a POINTER or ALLOCATABLE",
14130 c
->name
, sym
->name
, &c
->loc
);
14134 /* Add the hidden deferred length field. */
14135 if (c
->ts
.type
== BT_CHARACTER
14136 && (c
->ts
.deferred
|| c
->attr
.pdt_string
)
14137 && !c
->attr
.function
14138 && !sym
->attr
.is_class
)
14140 char name
[GFC_MAX_SYMBOL_LEN
+9];
14141 gfc_component
*strlen
;
14142 sprintf (name
, "_%s_length", c
->name
);
14143 strlen
= gfc_find_component (sym
, name
, true, true, NULL
);
14144 if (strlen
== NULL
)
14146 if (!gfc_add_component (sym
, name
, &strlen
))
14148 strlen
->ts
.type
= BT_INTEGER
;
14149 strlen
->ts
.kind
= gfc_charlen_int_kind
;
14150 strlen
->attr
.access
= ACCESS_PRIVATE
;
14151 strlen
->attr
.artificial
= 1;
14155 if (c
->ts
.type
== BT_DERIVED
14156 && sym
->component_access
!= ACCESS_PRIVATE
14157 && gfc_check_symbol_access (sym
)
14158 && !is_sym_host_assoc (c
->ts
.u
.derived
, sym
->ns
)
14159 && !c
->ts
.u
.derived
->attr
.use_assoc
14160 && !gfc_check_symbol_access (c
->ts
.u
.derived
)
14161 && !gfc_notify_std (GFC_STD_F2003
, "the component %qs is a "
14162 "PRIVATE type and cannot be a component of "
14163 "%qs, which is PUBLIC at %L", c
->name
,
14164 sym
->name
, &sym
->declared_at
))
14167 if ((sym
->attr
.sequence
|| sym
->attr
.is_bind_c
) && c
->ts
.type
== BT_CLASS
)
14169 gfc_error ("Polymorphic component %s at %L in SEQUENCE or BIND(C) "
14170 "type %s", c
->name
, &c
->loc
, sym
->name
);
14174 if (sym
->attr
.sequence
)
14176 if (c
->ts
.type
== BT_DERIVED
&& c
->ts
.u
.derived
->attr
.sequence
== 0)
14178 gfc_error ("Component %s of SEQUENCE type declared at %L does "
14179 "not have the SEQUENCE attribute",
14180 c
->ts
.u
.derived
->name
, &sym
->declared_at
);
14185 if (c
->ts
.type
== BT_DERIVED
&& c
->ts
.u
.derived
->attr
.generic
)
14186 c
->ts
.u
.derived
= gfc_find_dt_in_generic (c
->ts
.u
.derived
);
14187 else if (c
->ts
.type
== BT_CLASS
&& c
->attr
.class_ok
14188 && CLASS_DATA (c
)->ts
.u
.derived
->attr
.generic
)
14189 CLASS_DATA (c
)->ts
.u
.derived
14190 = gfc_find_dt_in_generic (CLASS_DATA (c
)->ts
.u
.derived
);
14192 /* If an allocatable component derived type is of the same type as
14193 the enclosing derived type, we need a vtable generating so that
14194 the __deallocate procedure is created. */
14195 if ((c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
14196 && c
->ts
.u
.derived
== sym
&& c
->attr
.allocatable
== 1)
14197 gfc_find_vtab (&c
->ts
);
14199 /* Ensure that all the derived type components are put on the
14200 derived type list; even in formal namespaces, where derived type
14201 pointer components might not have been declared. */
14202 if (c
->ts
.type
== BT_DERIVED
14204 && c
->ts
.u
.derived
->components
14206 && sym
!= c
->ts
.u
.derived
)
14207 add_dt_to_dt_list (c
->ts
.u
.derived
);
14209 if (!gfc_resolve_array_spec (c
->as
,
14210 !(c
->attr
.pointer
|| c
->attr
.proc_pointer
14211 || c
->attr
.allocatable
)))
14214 if (c
->initializer
&& !sym
->attr
.vtype
14215 && !c
->attr
.pdt_kind
&& !c
->attr
.pdt_len
14216 && !gfc_check_assign_symbol (sym
, c
, c
->initializer
))
14223 /* Be nice about the locus for a structure expression - show the locus of the
14224 first non-null sub-expression if we can. */
14227 cons_where (gfc_expr
*struct_expr
)
14229 gfc_constructor
*cons
;
14231 gcc_assert (struct_expr
&& struct_expr
->expr_type
== EXPR_STRUCTURE
);
14233 cons
= gfc_constructor_first (struct_expr
->value
.constructor
);
14234 for (; cons
; cons
= gfc_constructor_next (cons
))
14236 if (cons
->expr
&& cons
->expr
->expr_type
!= EXPR_NULL
)
14237 return &cons
->expr
->where
;
14240 return &struct_expr
->where
;
14243 /* Resolve the components of a structure type. Much less work than derived
14247 resolve_fl_struct (gfc_symbol
*sym
)
14250 gfc_expr
*init
= NULL
;
14253 /* Make sure UNIONs do not have overlapping initializers. */
14254 if (sym
->attr
.flavor
== FL_UNION
)
14256 for (c
= sym
->components
; c
; c
= c
->next
)
14258 if (init
&& c
->initializer
)
14260 gfc_error ("Conflicting initializers in union at %L and %L",
14261 cons_where (init
), cons_where (c
->initializer
));
14262 gfc_free_expr (c
->initializer
);
14263 c
->initializer
= NULL
;
14266 init
= c
->initializer
;
14271 for (c
= sym
->components
; c
; c
= c
->next
)
14272 if (!resolve_component (c
, sym
))
14278 if (sym
->components
)
14279 add_dt_to_dt_list (sym
);
14285 /* Resolve the components of a derived type. This does not have to wait until
14286 resolution stage, but can be done as soon as the dt declaration has been
14290 resolve_fl_derived0 (gfc_symbol
*sym
)
14292 gfc_symbol
* super_type
;
14294 gfc_formal_arglist
*f
;
14297 if (sym
->attr
.unlimited_polymorphic
)
14300 super_type
= gfc_get_derived_super_type (sym
);
14303 if (super_type
&& sym
->attr
.coarray_comp
&& !super_type
->attr
.coarray_comp
)
14305 gfc_error ("As extending type %qs at %L has a coarray component, "
14306 "parent type %qs shall also have one", sym
->name
,
14307 &sym
->declared_at
, super_type
->name
);
14311 /* Ensure the extended type gets resolved before we do. */
14312 if (super_type
&& !resolve_fl_derived0 (super_type
))
14315 /* An ABSTRACT type must be extensible. */
14316 if (sym
->attr
.abstract
&& !gfc_type_is_extensible (sym
))
14318 gfc_error ("Non-extensible derived-type %qs at %L must not be ABSTRACT",
14319 sym
->name
, &sym
->declared_at
);
14323 c
= (sym
->attr
.is_class
) ? sym
->components
->ts
.u
.derived
->components
14327 for ( ; c
!= NULL
; c
= c
->next
)
14328 if (!resolve_component (c
, sym
))
14334 /* Now add the caf token field, where needed. */
14335 if (flag_coarray
!= GFC_FCOARRAY_NONE
14336 && !sym
->attr
.is_class
&& !sym
->attr
.vtype
)
14338 for (c
= sym
->components
; c
; c
= c
->next
)
14339 if (!c
->attr
.dimension
&& !c
->attr
.codimension
14340 && (c
->attr
.allocatable
|| c
->attr
.pointer
))
14342 char name
[GFC_MAX_SYMBOL_LEN
+9];
14343 gfc_component
*token
;
14344 sprintf (name
, "_caf_%s", c
->name
);
14345 token
= gfc_find_component (sym
, name
, true, true, NULL
);
14348 if (!gfc_add_component (sym
, name
, &token
))
14350 token
->ts
.type
= BT_VOID
;
14351 token
->ts
.kind
= gfc_default_integer_kind
;
14352 token
->attr
.access
= ACCESS_PRIVATE
;
14353 token
->attr
.artificial
= 1;
14354 token
->attr
.caf_token
= 1;
14359 check_defined_assignments (sym
);
14361 if (!sym
->attr
.defined_assign_comp
&& super_type
)
14362 sym
->attr
.defined_assign_comp
14363 = super_type
->attr
.defined_assign_comp
;
14365 /* If this is a non-ABSTRACT type extending an ABSTRACT one, ensure that
14366 all DEFERRED bindings are overridden. */
14367 if (super_type
&& super_type
->attr
.abstract
&& !sym
->attr
.abstract
14368 && !sym
->attr
.is_class
14369 && !ensure_not_abstract (sym
, super_type
))
14372 /* Check that there is a component for every PDT parameter. */
14373 if (sym
->attr
.pdt_template
)
14375 for (f
= sym
->formal
; f
; f
= f
->next
)
14379 c
= gfc_find_component (sym
, f
->sym
->name
, true, true, NULL
);
14382 gfc_error ("Parameterized type %qs does not have a component "
14383 "corresponding to parameter %qs at %L", sym
->name
,
14384 f
->sym
->name
, &sym
->declared_at
);
14390 /* Add derived type to the derived type list. */
14391 add_dt_to_dt_list (sym
);
14397 /* The following procedure does the full resolution of a derived type,
14398 including resolution of all type-bound procedures (if present). In contrast
14399 to 'resolve_fl_derived0' this can only be done after the module has been
14400 parsed completely. */
14403 resolve_fl_derived (gfc_symbol
*sym
)
14405 gfc_symbol
*gen_dt
= NULL
;
14407 if (sym
->attr
.unlimited_polymorphic
)
14410 if (!sym
->attr
.is_class
)
14411 gfc_find_symbol (sym
->name
, sym
->ns
, 0, &gen_dt
);
14412 if (gen_dt
&& gen_dt
->generic
&& gen_dt
->generic
->next
14413 && (!gen_dt
->generic
->sym
->attr
.use_assoc
14414 || gen_dt
->generic
->sym
->module
!= gen_dt
->generic
->next
->sym
->module
)
14415 && !gfc_notify_std (GFC_STD_F2003
, "Generic name %qs of function "
14416 "%qs at %L being the same name as derived "
14417 "type at %L", sym
->name
,
14418 gen_dt
->generic
->sym
== sym
14419 ? gen_dt
->generic
->next
->sym
->name
14420 : gen_dt
->generic
->sym
->name
,
14421 gen_dt
->generic
->sym
== sym
14422 ? &gen_dt
->generic
->next
->sym
->declared_at
14423 : &gen_dt
->generic
->sym
->declared_at
,
14424 &sym
->declared_at
))
14427 if (sym
->components
== NULL
&& !sym
->attr
.zero_comp
&& !sym
->attr
.use_assoc
)
14429 gfc_error ("Derived type %qs at %L has not been declared",
14430 sym
->name
, &sym
->declared_at
);
14434 /* Resolve the finalizer procedures. */
14435 if (!gfc_resolve_finalizers (sym
, NULL
))
14438 if (sym
->attr
.is_class
&& sym
->ts
.u
.derived
== NULL
)
14440 /* Fix up incomplete CLASS symbols. */
14441 gfc_component
*data
= gfc_find_component (sym
, "_data", true, true, NULL
);
14442 gfc_component
*vptr
= gfc_find_component (sym
, "_vptr", true, true, NULL
);
14444 /* Nothing more to do for unlimited polymorphic entities. */
14445 if (data
->ts
.u
.derived
->attr
.unlimited_polymorphic
)
14447 else if (vptr
->ts
.u
.derived
== NULL
)
14449 gfc_symbol
*vtab
= gfc_find_derived_vtab (data
->ts
.u
.derived
);
14451 vptr
->ts
.u
.derived
= vtab
->ts
.u
.derived
;
14452 if (!resolve_fl_derived0 (vptr
->ts
.u
.derived
))
14457 if (!resolve_fl_derived0 (sym
))
14460 /* Resolve the type-bound procedures. */
14461 if (!resolve_typebound_procedures (sym
))
14464 /* Generate module vtables subject to their accessibility and their not
14465 being vtables or pdt templates. If this is not done class declarations
14466 in external procedures wind up with their own version and so SELECT TYPE
14467 fails because the vptrs do not have the same address. */
14468 if (gfc_option
.allow_std
& GFC_STD_F2003
14469 && sym
->ns
->proc_name
14470 && sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
14471 && sym
->attr
.access
!= ACCESS_PRIVATE
14472 && !(sym
->attr
.use_assoc
|| sym
->attr
.vtype
|| sym
->attr
.pdt_template
))
14474 gfc_symbol
*vtab
= gfc_find_derived_vtab (sym
);
14475 gfc_set_sym_referenced (vtab
);
14483 resolve_fl_namelist (gfc_symbol
*sym
)
14488 for (nl
= sym
->namelist
; nl
; nl
= nl
->next
)
14490 /* Check again, the check in match only works if NAMELIST comes
14492 if (nl
->sym
->as
&& nl
->sym
->as
->type
== AS_ASSUMED_SIZE
)
14494 gfc_error ("Assumed size array %qs in namelist %qs at %L is not "
14495 "allowed", nl
->sym
->name
, sym
->name
, &sym
->declared_at
);
14499 if (nl
->sym
->as
&& nl
->sym
->as
->type
== AS_ASSUMED_SHAPE
14500 && !gfc_notify_std (GFC_STD_F2003
, "NAMELIST array object %qs "
14501 "with assumed shape in namelist %qs at %L",
14502 nl
->sym
->name
, sym
->name
, &sym
->declared_at
))
14505 if (is_non_constant_shape_array (nl
->sym
)
14506 && !gfc_notify_std (GFC_STD_F2003
, "NAMELIST array object %qs "
14507 "with nonconstant shape in namelist %qs at %L",
14508 nl
->sym
->name
, sym
->name
, &sym
->declared_at
))
14511 if (nl
->sym
->ts
.type
== BT_CHARACTER
14512 && (nl
->sym
->ts
.u
.cl
->length
== NULL
14513 || !gfc_is_constant_expr (nl
->sym
->ts
.u
.cl
->length
))
14514 && !gfc_notify_std (GFC_STD_F2003
, "NAMELIST object %qs with "
14515 "nonconstant character length in "
14516 "namelist %qs at %L", nl
->sym
->name
,
14517 sym
->name
, &sym
->declared_at
))
14522 /* Reject PRIVATE objects in a PUBLIC namelist. */
14523 if (gfc_check_symbol_access (sym
))
14525 for (nl
= sym
->namelist
; nl
; nl
= nl
->next
)
14527 if (!nl
->sym
->attr
.use_assoc
14528 && !is_sym_host_assoc (nl
->sym
, sym
->ns
)
14529 && !gfc_check_symbol_access (nl
->sym
))
14531 gfc_error ("NAMELIST object %qs was declared PRIVATE and "
14532 "cannot be member of PUBLIC namelist %qs at %L",
14533 nl
->sym
->name
, sym
->name
, &sym
->declared_at
);
14537 if (nl
->sym
->ts
.type
== BT_DERIVED
14538 && (nl
->sym
->ts
.u
.derived
->attr
.alloc_comp
14539 || nl
->sym
->ts
.u
.derived
->attr
.pointer_comp
))
14541 if (!gfc_notify_std (GFC_STD_F2003
, "NAMELIST object %qs in "
14542 "namelist %qs at %L with ALLOCATABLE "
14543 "or POINTER components", nl
->sym
->name
,
14544 sym
->name
, &sym
->declared_at
))
14549 /* Types with private components that came here by USE-association. */
14550 if (nl
->sym
->ts
.type
== BT_DERIVED
14551 && derived_inaccessible (nl
->sym
->ts
.u
.derived
))
14553 gfc_error ("NAMELIST object %qs has use-associated PRIVATE "
14554 "components and cannot be member of namelist %qs at %L",
14555 nl
->sym
->name
, sym
->name
, &sym
->declared_at
);
14559 /* Types with private components that are defined in the same module. */
14560 if (nl
->sym
->ts
.type
== BT_DERIVED
14561 && !is_sym_host_assoc (nl
->sym
->ts
.u
.derived
, sym
->ns
)
14562 && nl
->sym
->ts
.u
.derived
->attr
.private_comp
)
14564 gfc_error ("NAMELIST object %qs has PRIVATE components and "
14565 "cannot be a member of PUBLIC namelist %qs at %L",
14566 nl
->sym
->name
, sym
->name
, &sym
->declared_at
);
14573 /* 14.1.2 A module or internal procedure represent local entities
14574 of the same type as a namelist member and so are not allowed. */
14575 for (nl
= sym
->namelist
; nl
; nl
= nl
->next
)
14577 if (nl
->sym
->ts
.kind
!= 0 && nl
->sym
->attr
.flavor
== FL_VARIABLE
)
14580 if (nl
->sym
->attr
.function
&& nl
->sym
== nl
->sym
->result
)
14581 if ((nl
->sym
== sym
->ns
->proc_name
)
14583 (sym
->ns
->parent
&& nl
->sym
== sym
->ns
->parent
->proc_name
))
14588 gfc_find_symbol (nl
->sym
->name
, sym
->ns
, 1, &nlsym
);
14589 if (nlsym
&& nlsym
->attr
.flavor
== FL_PROCEDURE
)
14591 gfc_error ("PROCEDURE attribute conflicts with NAMELIST "
14592 "attribute in %qs at %L", nlsym
->name
,
14593 &sym
->declared_at
);
14600 for (nl
= sym
->namelist
; nl
; nl
= nl
->next
)
14601 nl
->sym
->attr
.asynchronous
= 1;
14608 resolve_fl_parameter (gfc_symbol
*sym
)
14610 /* A parameter array's shape needs to be constant. */
14611 if (sym
->as
!= NULL
14612 && (sym
->as
->type
== AS_DEFERRED
14613 || is_non_constant_shape_array (sym
)))
14615 gfc_error ("Parameter array %qs at %L cannot be automatic "
14616 "or of deferred shape", sym
->name
, &sym
->declared_at
);
14620 /* Constraints on deferred type parameter. */
14621 if (!deferred_requirements (sym
))
14624 /* Make sure a parameter that has been implicitly typed still
14625 matches the implicit type, since PARAMETER statements can precede
14626 IMPLICIT statements. */
14627 if (sym
->attr
.implicit_type
14628 && !gfc_compare_types (&sym
->ts
, gfc_get_default_type (sym
->name
,
14631 gfc_error ("Implicitly typed PARAMETER %qs at %L doesn't match a "
14632 "later IMPLICIT type", sym
->name
, &sym
->declared_at
);
14636 /* Make sure the types of derived parameters are consistent. This
14637 type checking is deferred until resolution because the type may
14638 refer to a derived type from the host. */
14639 if (sym
->ts
.type
== BT_DERIVED
14640 && !gfc_compare_types (&sym
->ts
, &sym
->value
->ts
))
14642 gfc_error ("Incompatible derived type in PARAMETER at %L",
14643 &sym
->value
->where
);
14647 /* F03:C509,C514. */
14648 if (sym
->ts
.type
== BT_CLASS
)
14650 gfc_error ("CLASS variable %qs at %L cannot have the PARAMETER attribute",
14651 sym
->name
, &sym
->declared_at
);
14659 /* Called by resolve_symbol to check PDTs. */
14662 resolve_pdt (gfc_symbol
* sym
)
14664 gfc_symbol
*derived
= NULL
;
14665 gfc_actual_arglist
*param
;
14667 bool const_len_exprs
= true;
14668 bool assumed_len_exprs
= false;
14669 symbol_attribute
*attr
;
14671 if (sym
->ts
.type
== BT_DERIVED
)
14673 derived
= sym
->ts
.u
.derived
;
14674 attr
= &(sym
->attr
);
14676 else if (sym
->ts
.type
== BT_CLASS
)
14678 derived
= CLASS_DATA (sym
)->ts
.u
.derived
;
14679 attr
= &(CLASS_DATA (sym
)->attr
);
14682 gcc_unreachable ();
14684 gcc_assert (derived
->attr
.pdt_type
);
14686 for (param
= sym
->param_list
; param
; param
= param
->next
)
14688 c
= gfc_find_component (derived
, param
->name
, false, true, NULL
);
14690 if (c
->attr
.pdt_kind
)
14693 if (param
->expr
&& !gfc_is_constant_expr (param
->expr
)
14694 && c
->attr
.pdt_len
)
14695 const_len_exprs
= false;
14696 else if (param
->spec_type
== SPEC_ASSUMED
)
14697 assumed_len_exprs
= true;
14699 if (param
->spec_type
== SPEC_DEFERRED
14700 && !attr
->allocatable
&& !attr
->pointer
)
14701 gfc_error ("The object %qs at %L has a deferred LEN "
14702 "parameter %qs and is neither allocatable "
14703 "nor a pointer", sym
->name
, &sym
->declared_at
,
14708 if (!const_len_exprs
14709 && (sym
->ns
->proc_name
->attr
.is_main_program
14710 || sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
14711 || sym
->attr
.save
!= SAVE_NONE
))
14712 gfc_error ("The AUTOMATIC object %qs at %L must not have the "
14713 "SAVE attribute or be a variable declared in the "
14714 "main program, a module or a submodule(F08/C513)",
14715 sym
->name
, &sym
->declared_at
);
14717 if (assumed_len_exprs
&& !(sym
->attr
.dummy
14718 || sym
->attr
.select_type_temporary
|| sym
->attr
.associate_var
))
14719 gfc_error ("The object %qs at %L with ASSUMED type parameters "
14720 "must be a dummy or a SELECT TYPE selector(F08/4.2)",
14721 sym
->name
, &sym
->declared_at
);
14725 /* Do anything necessary to resolve a symbol. Right now, we just
14726 assume that an otherwise unknown symbol is a variable. This sort
14727 of thing commonly happens for symbols in module. */
14730 resolve_symbol (gfc_symbol
*sym
)
14732 int check_constant
, mp_flag
;
14733 gfc_symtree
*symtree
;
14734 gfc_symtree
*this_symtree
;
14737 symbol_attribute class_attr
;
14738 gfc_array_spec
*as
;
14739 bool saved_specification_expr
;
14745 /* No symbol will ever have union type; only components can be unions.
14746 Union type declaration symbols have type BT_UNKNOWN but flavor FL_UNION
14747 (just like derived type declaration symbols have flavor FL_DERIVED). */
14748 gcc_assert (sym
->ts
.type
!= BT_UNION
);
14750 /* Coarrayed polymorphic objects with allocatable or pointer components are
14751 yet unsupported for -fcoarray=lib. */
14752 if (flag_coarray
== GFC_FCOARRAY_LIB
&& sym
->ts
.type
== BT_CLASS
14753 && sym
->ts
.u
.derived
&& CLASS_DATA (sym
)
14754 && CLASS_DATA (sym
)->attr
.codimension
14755 && (CLASS_DATA (sym
)->ts
.u
.derived
->attr
.alloc_comp
14756 || CLASS_DATA (sym
)->ts
.u
.derived
->attr
.pointer_comp
))
14758 gfc_error ("Sorry, allocatable/pointer components in polymorphic (CLASS) "
14759 "type coarrays at %L are unsupported", &sym
->declared_at
);
14763 if (sym
->attr
.artificial
)
14766 if (sym
->attr
.unlimited_polymorphic
)
14769 if (sym
->attr
.flavor
== FL_UNKNOWN
14770 || (sym
->attr
.flavor
== FL_PROCEDURE
&& !sym
->attr
.intrinsic
14771 && !sym
->attr
.generic
&& !sym
->attr
.external
14772 && sym
->attr
.if_source
== IFSRC_UNKNOWN
14773 && sym
->ts
.type
== BT_UNKNOWN
))
14776 /* If we find that a flavorless symbol is an interface in one of the
14777 parent namespaces, find its symtree in this namespace, free the
14778 symbol and set the symtree to point to the interface symbol. */
14779 for (ns
= gfc_current_ns
->parent
; ns
; ns
= ns
->parent
)
14781 symtree
= gfc_find_symtree (ns
->sym_root
, sym
->name
);
14782 if (symtree
&& (symtree
->n
.sym
->generic
||
14783 (symtree
->n
.sym
->attr
.flavor
== FL_PROCEDURE
14784 && sym
->ns
->construct_entities
)))
14786 this_symtree
= gfc_find_symtree (gfc_current_ns
->sym_root
,
14788 if (this_symtree
->n
.sym
== sym
)
14790 symtree
->n
.sym
->refs
++;
14791 gfc_release_symbol (sym
);
14792 this_symtree
->n
.sym
= symtree
->n
.sym
;
14798 /* Otherwise give it a flavor according to such attributes as
14800 if (sym
->attr
.flavor
== FL_UNKNOWN
&& sym
->attr
.external
== 0
14801 && sym
->attr
.intrinsic
== 0)
14802 sym
->attr
.flavor
= FL_VARIABLE
;
14803 else if (sym
->attr
.flavor
== FL_UNKNOWN
)
14805 sym
->attr
.flavor
= FL_PROCEDURE
;
14806 if (sym
->attr
.dimension
)
14807 sym
->attr
.function
= 1;
14811 if (sym
->attr
.external
&& sym
->ts
.type
!= BT_UNKNOWN
&& !sym
->attr
.function
)
14812 gfc_add_function (&sym
->attr
, sym
->name
, &sym
->declared_at
);
14814 if (sym
->attr
.procedure
&& sym
->attr
.if_source
!= IFSRC_DECL
14815 && !resolve_procedure_interface (sym
))
14818 if (sym
->attr
.is_protected
&& !sym
->attr
.proc_pointer
14819 && (sym
->attr
.procedure
|| sym
->attr
.external
))
14821 if (sym
->attr
.external
)
14822 gfc_error ("PROTECTED attribute conflicts with EXTERNAL attribute "
14823 "at %L", &sym
->declared_at
);
14825 gfc_error ("PROCEDURE attribute conflicts with PROTECTED attribute "
14826 "at %L", &sym
->declared_at
);
14831 if (sym
->attr
.flavor
== FL_DERIVED
&& !resolve_fl_derived (sym
))
14834 else if ((sym
->attr
.flavor
== FL_STRUCT
|| sym
->attr
.flavor
== FL_UNION
)
14835 && !resolve_fl_struct (sym
))
14838 /* Symbols that are module procedures with results (functions) have
14839 the types and array specification copied for type checking in
14840 procedures that call them, as well as for saving to a module
14841 file. These symbols can't stand the scrutiny that their results
14843 mp_flag
= (sym
->result
!= NULL
&& sym
->result
!= sym
);
14845 /* Make sure that the intrinsic is consistent with its internal
14846 representation. This needs to be done before assigning a default
14847 type to avoid spurious warnings. */
14848 if (sym
->attr
.flavor
!= FL_MODULE
&& sym
->attr
.intrinsic
14849 && !gfc_resolve_intrinsic (sym
, &sym
->declared_at
))
14852 /* Resolve associate names. */
14854 resolve_assoc_var (sym
, true);
14856 /* Assign default type to symbols that need one and don't have one. */
14857 if (sym
->ts
.type
== BT_UNKNOWN
)
14859 if (sym
->attr
.flavor
== FL_VARIABLE
|| sym
->attr
.flavor
== FL_PARAMETER
)
14861 gfc_set_default_type (sym
, 1, NULL
);
14864 if (sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.external
14865 && !sym
->attr
.function
&& !sym
->attr
.subroutine
14866 && gfc_get_default_type (sym
->name
, sym
->ns
)->type
== BT_UNKNOWN
)
14867 gfc_add_subroutine (&sym
->attr
, sym
->name
, &sym
->declared_at
);
14869 if (sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.function
)
14871 /* The specific case of an external procedure should emit an error
14872 in the case that there is no implicit type. */
14875 if (!sym
->attr
.mixed_entry_master
)
14876 gfc_set_default_type (sym
, sym
->attr
.external
, NULL
);
14880 /* Result may be in another namespace. */
14881 resolve_symbol (sym
->result
);
14883 if (!sym
->result
->attr
.proc_pointer
)
14885 sym
->ts
= sym
->result
->ts
;
14886 sym
->as
= gfc_copy_array_spec (sym
->result
->as
);
14887 sym
->attr
.dimension
= sym
->result
->attr
.dimension
;
14888 sym
->attr
.pointer
= sym
->result
->attr
.pointer
;
14889 sym
->attr
.allocatable
= sym
->result
->attr
.allocatable
;
14890 sym
->attr
.contiguous
= sym
->result
->attr
.contiguous
;
14895 else if (mp_flag
&& sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.function
)
14897 bool saved_specification_expr
= specification_expr
;
14898 specification_expr
= true;
14899 gfc_resolve_array_spec (sym
->result
->as
, false);
14900 specification_expr
= saved_specification_expr
;
14903 if (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
)
14905 as
= CLASS_DATA (sym
)->as
;
14906 class_attr
= CLASS_DATA (sym
)->attr
;
14907 class_attr
.pointer
= class_attr
.class_pointer
;
14911 class_attr
= sym
->attr
;
14916 if (sym
->attr
.contiguous
14917 && (!class_attr
.dimension
14918 || (as
->type
!= AS_ASSUMED_SHAPE
&& as
->type
!= AS_ASSUMED_RANK
14919 && !class_attr
.pointer
)))
14921 gfc_error ("%qs at %L has the CONTIGUOUS attribute but is not an "
14922 "array pointer or an assumed-shape or assumed-rank array",
14923 sym
->name
, &sym
->declared_at
);
14927 /* Assumed size arrays and assumed shape arrays must be dummy
14928 arguments. Array-spec's of implied-shape should have been resolved to
14929 AS_EXPLICIT already. */
14933 /* If AS_IMPLIED_SHAPE makes it to here, it must be a bad
14934 specification expression. */
14935 if (as
->type
== AS_IMPLIED_SHAPE
)
14938 for (i
=0; i
<as
->rank
; i
++)
14940 if (as
->lower
[i
] != NULL
&& as
->upper
[i
] == NULL
)
14942 gfc_error ("Bad specification for assumed size array at %L",
14943 &as
->lower
[i
]->where
);
14950 if (((as
->type
== AS_ASSUMED_SIZE
&& !as
->cp_was_assumed
)
14951 || as
->type
== AS_ASSUMED_SHAPE
)
14952 && !sym
->attr
.dummy
&& !sym
->attr
.select_type_temporary
)
14954 if (as
->type
== AS_ASSUMED_SIZE
)
14955 gfc_error ("Assumed size array at %L must be a dummy argument",
14956 &sym
->declared_at
);
14958 gfc_error ("Assumed shape array at %L must be a dummy argument",
14959 &sym
->declared_at
);
14962 /* TS 29113, C535a. */
14963 if (as
->type
== AS_ASSUMED_RANK
&& !sym
->attr
.dummy
14964 && !sym
->attr
.select_type_temporary
)
14966 gfc_error ("Assumed-rank array at %L must be a dummy argument",
14967 &sym
->declared_at
);
14970 if (as
->type
== AS_ASSUMED_RANK
14971 && (sym
->attr
.codimension
|| sym
->attr
.value
))
14973 gfc_error ("Assumed-rank array at %L may not have the VALUE or "
14974 "CODIMENSION attribute", &sym
->declared_at
);
14979 /* Make sure symbols with known intent or optional are really dummy
14980 variable. Because of ENTRY statement, this has to be deferred
14981 until resolution time. */
14983 if (!sym
->attr
.dummy
14984 && (sym
->attr
.optional
|| sym
->attr
.intent
!= INTENT_UNKNOWN
))
14986 gfc_error ("Symbol at %L is not a DUMMY variable", &sym
->declared_at
);
14990 if (sym
->attr
.value
&& !sym
->attr
.dummy
)
14992 gfc_error ("%qs at %L cannot have the VALUE attribute because "
14993 "it is not a dummy argument", sym
->name
, &sym
->declared_at
);
14997 if (sym
->attr
.value
&& sym
->ts
.type
== BT_CHARACTER
)
14999 gfc_charlen
*cl
= sym
->ts
.u
.cl
;
15000 if (!cl
|| !cl
->length
|| cl
->length
->expr_type
!= EXPR_CONSTANT
)
15002 gfc_error ("Character dummy variable %qs at %L with VALUE "
15003 "attribute must have constant length",
15004 sym
->name
, &sym
->declared_at
);
15008 if (sym
->ts
.is_c_interop
15009 && mpz_cmp_si (cl
->length
->value
.integer
, 1) != 0)
15011 gfc_error ("C interoperable character dummy variable %qs at %L "
15012 "with VALUE attribute must have length one",
15013 sym
->name
, &sym
->declared_at
);
15018 if (sym
->ts
.type
== BT_DERIVED
&& !sym
->attr
.is_iso_c
15019 && sym
->ts
.u
.derived
->attr
.generic
)
15021 sym
->ts
.u
.derived
= gfc_find_dt_in_generic (sym
->ts
.u
.derived
);
15022 if (!sym
->ts
.u
.derived
)
15024 gfc_error ("The derived type %qs at %L is of type %qs, "
15025 "which has not been defined", sym
->name
,
15026 &sym
->declared_at
, sym
->ts
.u
.derived
->name
);
15027 sym
->ts
.type
= BT_UNKNOWN
;
15032 /* Use the same constraints as TYPE(*), except for the type check
15033 and that only scalars and assumed-size arrays are permitted. */
15034 if (sym
->attr
.ext_attr
& (1 << EXT_ATTR_NO_ARG_CHECK
))
15036 if (!sym
->attr
.dummy
)
15038 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute shall be "
15039 "a dummy argument", sym
->name
, &sym
->declared_at
);
15043 if (sym
->ts
.type
!= BT_ASSUMED
&& sym
->ts
.type
!= BT_INTEGER
15044 && sym
->ts
.type
!= BT_REAL
&& sym
->ts
.type
!= BT_LOGICAL
15045 && sym
->ts
.type
!= BT_COMPLEX
)
15047 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute shall be "
15048 "of type TYPE(*) or of an numeric intrinsic type",
15049 sym
->name
, &sym
->declared_at
);
15053 if (sym
->attr
.allocatable
|| sym
->attr
.codimension
15054 || sym
->attr
.pointer
|| sym
->attr
.value
)
15056 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute may not "
15057 "have the ALLOCATABLE, CODIMENSION, POINTER or VALUE "
15058 "attribute", sym
->name
, &sym
->declared_at
);
15062 if (sym
->attr
.intent
== INTENT_OUT
)
15064 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute may not "
15065 "have the INTENT(OUT) attribute",
15066 sym
->name
, &sym
->declared_at
);
15069 if (sym
->attr
.dimension
&& sym
->as
->type
!= AS_ASSUMED_SIZE
)
15071 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute shall "
15072 "either be a scalar or an assumed-size array",
15073 sym
->name
, &sym
->declared_at
);
15077 /* Set the type to TYPE(*) and add a dimension(*) to ensure
15078 NO_ARG_CHECK is correctly handled in trans*.c, e.g. with
15080 sym
->ts
.type
= BT_ASSUMED
;
15081 sym
->as
= gfc_get_array_spec ();
15082 sym
->as
->type
= AS_ASSUMED_SIZE
;
15084 sym
->as
->lower
[0] = gfc_get_int_expr (gfc_default_integer_kind
, NULL
, 1);
15086 else if (sym
->ts
.type
== BT_ASSUMED
)
15088 /* TS 29113, C407a. */
15089 if (!sym
->attr
.dummy
)
15091 gfc_error ("Assumed type of variable %s at %L is only permitted "
15092 "for dummy variables", sym
->name
, &sym
->declared_at
);
15095 if (sym
->attr
.allocatable
|| sym
->attr
.codimension
15096 || sym
->attr
.pointer
|| sym
->attr
.value
)
15098 gfc_error ("Assumed-type variable %s at %L may not have the "
15099 "ALLOCATABLE, CODIMENSION, POINTER or VALUE attribute",
15100 sym
->name
, &sym
->declared_at
);
15103 if (sym
->attr
.intent
== INTENT_OUT
)
15105 gfc_error ("Assumed-type variable %s at %L may not have the "
15106 "INTENT(OUT) attribute",
15107 sym
->name
, &sym
->declared_at
);
15110 if (sym
->attr
.dimension
&& sym
->as
->type
== AS_EXPLICIT
)
15112 gfc_error ("Assumed-type variable %s at %L shall not be an "
15113 "explicit-shape array", sym
->name
, &sym
->declared_at
);
15118 /* If the symbol is marked as bind(c), that it is declared at module level
15119 scope and verify its type and kind. Do not do the latter for symbols
15120 that are implicitly typed because that is handled in
15121 gfc_set_default_type. Handle dummy arguments and procedure definitions
15122 separately. Also, anything that is use associated is not handled here
15123 but instead is handled in the module it is declared in. Finally, derived
15124 type definitions are allowed to be BIND(C) since that only implies that
15125 they're interoperable, and they are checked fully for interoperability
15126 when a variable is declared of that type. */
15127 if (sym
->attr
.is_bind_c
&& sym
->attr
.use_assoc
== 0
15128 && sym
->attr
.dummy
== 0 && sym
->attr
.flavor
!= FL_PROCEDURE
15129 && sym
->attr
.flavor
!= FL_DERIVED
)
15133 /* First, make sure the variable is declared at the
15134 module-level scope (J3/04-007, Section 15.3). */
15135 if (sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
&&
15136 sym
->attr
.in_common
== 0)
15138 gfc_error ("Variable %qs at %L cannot be BIND(C) because it "
15139 "is neither a COMMON block nor declared at the "
15140 "module level scope", sym
->name
, &(sym
->declared_at
));
15143 else if (sym
->ts
.type
== BT_CHARACTER
15144 && (sym
->ts
.u
.cl
== NULL
|| sym
->ts
.u
.cl
->length
== NULL
15145 || !gfc_is_constant_expr (sym
->ts
.u
.cl
->length
)
15146 || mpz_cmp_si (sym
->ts
.u
.cl
->length
->value
.integer
, 1) != 0))
15148 gfc_error ("BIND(C) Variable %qs at %L must have length one",
15149 sym
->name
, &sym
->declared_at
);
15152 else if (sym
->common_head
!= NULL
&& sym
->attr
.implicit_type
== 0)
15154 t
= verify_com_block_vars_c_interop (sym
->common_head
);
15156 else if (sym
->attr
.implicit_type
== 0)
15158 /* If type() declaration, we need to verify that the components
15159 of the given type are all C interoperable, etc. */
15160 if (sym
->ts
.type
== BT_DERIVED
&&
15161 sym
->ts
.u
.derived
->attr
.is_c_interop
!= 1)
15163 /* Make sure the user marked the derived type as BIND(C). If
15164 not, call the verify routine. This could print an error
15165 for the derived type more than once if multiple variables
15166 of that type are declared. */
15167 if (sym
->ts
.u
.derived
->attr
.is_bind_c
!= 1)
15168 verify_bind_c_derived_type (sym
->ts
.u
.derived
);
15172 /* Verify the variable itself as C interoperable if it
15173 is BIND(C). It is not possible for this to succeed if
15174 the verify_bind_c_derived_type failed, so don't have to handle
15175 any error returned by verify_bind_c_derived_type. */
15176 t
= verify_bind_c_sym (sym
, &(sym
->ts
), sym
->attr
.in_common
,
15177 sym
->common_block
);
15182 /* clear the is_bind_c flag to prevent reporting errors more than
15183 once if something failed. */
15184 sym
->attr
.is_bind_c
= 0;
15189 /* If a derived type symbol has reached this point, without its
15190 type being declared, we have an error. Notice that most
15191 conditions that produce undefined derived types have already
15192 been dealt with. However, the likes of:
15193 implicit type(t) (t) ..... call foo (t) will get us here if
15194 the type is not declared in the scope of the implicit
15195 statement. Change the type to BT_UNKNOWN, both because it is so
15196 and to prevent an ICE. */
15197 if (sym
->ts
.type
== BT_DERIVED
&& !sym
->attr
.is_iso_c
15198 && sym
->ts
.u
.derived
->components
== NULL
15199 && !sym
->ts
.u
.derived
->attr
.zero_comp
)
15201 gfc_error ("The derived type %qs at %L is of type %qs, "
15202 "which has not been defined", sym
->name
,
15203 &sym
->declared_at
, sym
->ts
.u
.derived
->name
);
15204 sym
->ts
.type
= BT_UNKNOWN
;
15208 /* Make sure that the derived type has been resolved and that the
15209 derived type is visible in the symbol's namespace, if it is a
15210 module function and is not PRIVATE. */
15211 if (sym
->ts
.type
== BT_DERIVED
15212 && sym
->ts
.u
.derived
->attr
.use_assoc
15213 && sym
->ns
->proc_name
15214 && sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
15215 && !resolve_fl_derived (sym
->ts
.u
.derived
))
15218 /* Unless the derived-type declaration is use associated, Fortran 95
15219 does not allow public entries of private derived types.
15220 See 4.4.1 (F95) and 4.5.1.1 (F2003); and related interpretation
15221 161 in 95-006r3. */
15222 if (sym
->ts
.type
== BT_DERIVED
15223 && sym
->ns
->proc_name
&& sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
15224 && !sym
->ts
.u
.derived
->attr
.use_assoc
15225 && gfc_check_symbol_access (sym
)
15226 && !gfc_check_symbol_access (sym
->ts
.u
.derived
)
15227 && !gfc_notify_std (GFC_STD_F2003
, "PUBLIC %s %qs at %L of PRIVATE "
15228 "derived type %qs",
15229 (sym
->attr
.flavor
== FL_PARAMETER
)
15230 ? "parameter" : "variable",
15231 sym
->name
, &sym
->declared_at
,
15232 sym
->ts
.u
.derived
->name
))
15235 /* F2008, C1302. */
15236 if (sym
->ts
.type
== BT_DERIVED
15237 && ((sym
->ts
.u
.derived
->from_intmod
== INTMOD_ISO_FORTRAN_ENV
15238 && sym
->ts
.u
.derived
->intmod_sym_id
== ISOFORTRAN_LOCK_TYPE
)
15239 || sym
->ts
.u
.derived
->attr
.lock_comp
)
15240 && !sym
->attr
.codimension
&& !sym
->ts
.u
.derived
->attr
.coarray_comp
)
15242 gfc_error ("Variable %s at %L of type LOCK_TYPE or with subcomponent of "
15243 "type LOCK_TYPE must be a coarray", sym
->name
,
15244 &sym
->declared_at
);
15248 /* TS18508, C702/C703. */
15249 if (sym
->ts
.type
== BT_DERIVED
15250 && ((sym
->ts
.u
.derived
->from_intmod
== INTMOD_ISO_FORTRAN_ENV
15251 && sym
->ts
.u
.derived
->intmod_sym_id
== ISOFORTRAN_EVENT_TYPE
)
15252 || sym
->ts
.u
.derived
->attr
.event_comp
)
15253 && !sym
->attr
.codimension
&& !sym
->ts
.u
.derived
->attr
.coarray_comp
)
15255 gfc_error ("Variable %s at %L of type EVENT_TYPE or with subcomponent of "
15256 "type EVENT_TYPE must be a coarray", sym
->name
,
15257 &sym
->declared_at
);
15261 /* An assumed-size array with INTENT(OUT) shall not be of a type for which
15262 default initialization is defined (5.1.2.4.4). */
15263 if (sym
->ts
.type
== BT_DERIVED
15265 && sym
->attr
.intent
== INTENT_OUT
15267 && sym
->as
->type
== AS_ASSUMED_SIZE
)
15269 for (c
= sym
->ts
.u
.derived
->components
; c
; c
= c
->next
)
15271 if (c
->initializer
)
15273 gfc_error ("The INTENT(OUT) dummy argument %qs at %L is "
15274 "ASSUMED SIZE and so cannot have a default initializer",
15275 sym
->name
, &sym
->declared_at
);
15282 if (sym
->ts
.type
== BT_DERIVED
&& sym
->attr
.dummy
15283 && sym
->attr
.intent
== INTENT_OUT
&& sym
->attr
.lock_comp
)
15285 gfc_error ("Dummy argument %qs at %L of LOCK_TYPE shall not be "
15286 "INTENT(OUT)", sym
->name
, &sym
->declared_at
);
15291 if (sym
->ts
.type
== BT_DERIVED
&& sym
->attr
.dummy
15292 && sym
->attr
.intent
== INTENT_OUT
&& sym
->attr
.event_comp
)
15294 gfc_error ("Dummy argument %qs at %L of EVENT_TYPE shall not be "
15295 "INTENT(OUT)", sym
->name
, &sym
->declared_at
);
15300 if ((((sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
->attr
.coarray_comp
)
15301 || (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
15302 && CLASS_DATA (sym
)->attr
.coarray_comp
))
15303 || class_attr
.codimension
)
15304 && (sym
->attr
.result
|| sym
->result
== sym
))
15306 gfc_error ("Function result %qs at %L shall not be a coarray or have "
15307 "a coarray component", sym
->name
, &sym
->declared_at
);
15312 if (sym
->attr
.codimension
&& sym
->ts
.type
== BT_DERIVED
15313 && sym
->ts
.u
.derived
->ts
.is_iso_c
)
15315 gfc_error ("Variable %qs at %L of TYPE(C_PTR) or TYPE(C_FUNPTR) "
15316 "shall not be a coarray", sym
->name
, &sym
->declared_at
);
15321 if (((sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
->attr
.coarray_comp
)
15322 || (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
15323 && CLASS_DATA (sym
)->attr
.coarray_comp
))
15324 && (class_attr
.codimension
|| class_attr
.pointer
|| class_attr
.dimension
15325 || class_attr
.allocatable
))
15327 gfc_error ("Variable %qs at %L with coarray component shall be a "
15328 "nonpointer, nonallocatable scalar, which is not a coarray",
15329 sym
->name
, &sym
->declared_at
);
15333 /* F2008, C526. The function-result case was handled above. */
15334 if (class_attr
.codimension
15335 && !(class_attr
.allocatable
|| sym
->attr
.dummy
|| sym
->attr
.save
15336 || sym
->attr
.select_type_temporary
15337 || sym
->attr
.associate_var
15338 || (sym
->ns
->save_all
&& !sym
->attr
.automatic
)
15339 || sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
15340 || sym
->ns
->proc_name
->attr
.is_main_program
15341 || sym
->attr
.function
|| sym
->attr
.result
|| sym
->attr
.use_assoc
))
15343 gfc_error ("Variable %qs at %L is a coarray and is not ALLOCATABLE, SAVE "
15344 "nor a dummy argument", sym
->name
, &sym
->declared_at
);
15348 else if (class_attr
.codimension
&& !sym
->attr
.select_type_temporary
15349 && !class_attr
.allocatable
&& as
&& as
->cotype
== AS_DEFERRED
)
15351 gfc_error ("Coarray variable %qs at %L shall not have codimensions with "
15352 "deferred shape", sym
->name
, &sym
->declared_at
);
15355 else if (class_attr
.codimension
&& class_attr
.allocatable
&& as
15356 && (as
->cotype
!= AS_DEFERRED
|| as
->type
!= AS_DEFERRED
))
15358 gfc_error ("Allocatable coarray variable %qs at %L must have "
15359 "deferred shape", sym
->name
, &sym
->declared_at
);
15364 if ((((sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
->attr
.coarray_comp
)
15365 || (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
15366 && CLASS_DATA (sym
)->attr
.coarray_comp
))
15367 || (class_attr
.codimension
&& class_attr
.allocatable
))
15368 && sym
->attr
.dummy
&& sym
->attr
.intent
== INTENT_OUT
)
15370 gfc_error ("Variable %qs at %L is INTENT(OUT) and can thus not be an "
15371 "allocatable coarray or have coarray components",
15372 sym
->name
, &sym
->declared_at
);
15376 if (class_attr
.codimension
&& sym
->attr
.dummy
15377 && sym
->ns
->proc_name
&& sym
->ns
->proc_name
->attr
.is_bind_c
)
15379 gfc_error ("Coarray dummy variable %qs at %L not allowed in BIND(C) "
15380 "procedure %qs", sym
->name
, &sym
->declared_at
,
15381 sym
->ns
->proc_name
->name
);
15385 if (sym
->ts
.type
== BT_LOGICAL
15386 && ((sym
->attr
.function
&& sym
->attr
.is_bind_c
&& sym
->result
== sym
)
15387 || ((sym
->attr
.dummy
|| sym
->attr
.result
) && sym
->ns
->proc_name
15388 && sym
->ns
->proc_name
->attr
.is_bind_c
)))
15391 for (i
= 0; gfc_logical_kinds
[i
].kind
; i
++)
15392 if (gfc_logical_kinds
[i
].kind
== sym
->ts
.kind
)
15394 if (!gfc_logical_kinds
[i
].c_bool
&& sym
->attr
.dummy
15395 && !gfc_notify_std (GFC_STD_GNU
, "LOGICAL dummy argument %qs at "
15396 "%L with non-C_Bool kind in BIND(C) procedure "
15397 "%qs", sym
->name
, &sym
->declared_at
,
15398 sym
->ns
->proc_name
->name
))
15400 else if (!gfc_logical_kinds
[i
].c_bool
15401 && !gfc_notify_std (GFC_STD_GNU
, "LOGICAL result variable "
15402 "%qs at %L with non-C_Bool kind in "
15403 "BIND(C) procedure %qs", sym
->name
,
15405 sym
->attr
.function
? sym
->name
15406 : sym
->ns
->proc_name
->name
))
15410 switch (sym
->attr
.flavor
)
15413 if (!resolve_fl_variable (sym
, mp_flag
))
15418 if (sym
->formal
&& !sym
->formal_ns
)
15420 /* Check that none of the arguments are a namelist. */
15421 gfc_formal_arglist
*formal
= sym
->formal
;
15423 for (; formal
; formal
= formal
->next
)
15424 if (formal
->sym
&& formal
->sym
->attr
.flavor
== FL_NAMELIST
)
15426 gfc_error ("Namelist %qs cannot be an argument to "
15427 "subroutine or function at %L",
15428 formal
->sym
->name
, &sym
->declared_at
);
15433 if (!resolve_fl_procedure (sym
, mp_flag
))
15438 if (!resolve_fl_namelist (sym
))
15443 if (!resolve_fl_parameter (sym
))
15451 /* Resolve array specifier. Check as well some constraints
15452 on COMMON blocks. */
15454 check_constant
= sym
->attr
.in_common
&& !sym
->attr
.pointer
;
15456 /* Set the formal_arg_flag so that check_conflict will not throw
15457 an error for host associated variables in the specification
15458 expression for an array_valued function. */
15459 if ((sym
->attr
.function
|| sym
->attr
.result
) && sym
->as
)
15460 formal_arg_flag
= true;
15462 saved_specification_expr
= specification_expr
;
15463 specification_expr
= true;
15464 gfc_resolve_array_spec (sym
->as
, check_constant
);
15465 specification_expr
= saved_specification_expr
;
15467 formal_arg_flag
= false;
15469 /* Resolve formal namespaces. */
15470 if (sym
->formal_ns
&& sym
->formal_ns
!= gfc_current_ns
15471 && !sym
->attr
.contained
&& !sym
->attr
.intrinsic
)
15472 gfc_resolve (sym
->formal_ns
);
15474 /* Make sure the formal namespace is present. */
15475 if (sym
->formal
&& !sym
->formal_ns
)
15477 gfc_formal_arglist
*formal
= sym
->formal
;
15478 while (formal
&& !formal
->sym
)
15479 formal
= formal
->next
;
15483 sym
->formal_ns
= formal
->sym
->ns
;
15484 if (sym
->ns
!= formal
->sym
->ns
)
15485 sym
->formal_ns
->refs
++;
15489 /* Check threadprivate restrictions. */
15490 if (sym
->attr
.threadprivate
&& !sym
->attr
.save
15491 && !(sym
->ns
->save_all
&& !sym
->attr
.automatic
)
15492 && (!sym
->attr
.in_common
15493 && sym
->module
== NULL
15494 && (sym
->ns
->proc_name
== NULL
15495 || sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
)))
15496 gfc_error ("Threadprivate at %L isn't SAVEd", &sym
->declared_at
);
15498 /* Check omp declare target restrictions. */
15499 if (sym
->attr
.omp_declare_target
15500 && sym
->attr
.flavor
== FL_VARIABLE
15502 && !(sym
->ns
->save_all
&& !sym
->attr
.automatic
)
15503 && (!sym
->attr
.in_common
15504 && sym
->module
== NULL
15505 && (sym
->ns
->proc_name
== NULL
15506 || sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
)))
15507 gfc_error ("!$OMP DECLARE TARGET variable %qs at %L isn't SAVEd",
15508 sym
->name
, &sym
->declared_at
);
15510 /* If we have come this far we can apply default-initializers, as
15511 described in 14.7.5, to those variables that have not already
15512 been assigned one. */
15513 if (sym
->ts
.type
== BT_DERIVED
15515 && !sym
->attr
.allocatable
15516 && !sym
->attr
.alloc_comp
)
15518 symbol_attribute
*a
= &sym
->attr
;
15520 if ((!a
->save
&& !a
->dummy
&& !a
->pointer
15521 && !a
->in_common
&& !a
->use_assoc
15523 && !((a
->function
|| a
->result
)
15525 || sym
->ts
.u
.derived
->attr
.alloc_comp
15526 || sym
->ts
.u
.derived
->attr
.pointer_comp
))
15527 && !(a
->function
&& sym
!= sym
->result
))
15528 || (a
->dummy
&& a
->intent
== INTENT_OUT
&& !a
->pointer
))
15529 apply_default_init (sym
);
15530 else if (a
->function
&& sym
->result
&& a
->access
!= ACCESS_PRIVATE
15531 && (sym
->ts
.u
.derived
->attr
.alloc_comp
15532 || sym
->ts
.u
.derived
->attr
.pointer_comp
))
15533 /* Mark the result symbol to be referenced, when it has allocatable
15535 sym
->result
->attr
.referenced
= 1;
15538 if (sym
->ts
.type
== BT_CLASS
&& sym
->ns
== gfc_current_ns
15539 && sym
->attr
.dummy
&& sym
->attr
.intent
== INTENT_OUT
15540 && !CLASS_DATA (sym
)->attr
.class_pointer
15541 && !CLASS_DATA (sym
)->attr
.allocatable
)
15542 apply_default_init (sym
);
15544 /* If this symbol has a type-spec, check it. */
15545 if (sym
->attr
.flavor
== FL_VARIABLE
|| sym
->attr
.flavor
== FL_PARAMETER
15546 || (sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.function
))
15547 if (!resolve_typespec_used (&sym
->ts
, &sym
->declared_at
, sym
->name
))
15550 if (sym
->param_list
)
15555 /************* Resolve DATA statements *************/
15559 gfc_data_value
*vnode
;
15565 /* Advance the values structure to point to the next value in the data list. */
15568 next_data_value (void)
15570 while (mpz_cmp_ui (values
.left
, 0) == 0)
15573 if (values
.vnode
->next
== NULL
)
15576 values
.vnode
= values
.vnode
->next
;
15577 mpz_set (values
.left
, values
.vnode
->repeat
);
15585 check_data_variable (gfc_data_variable
*var
, locus
*where
)
15591 ar_type mark
= AR_UNKNOWN
;
15593 mpz_t section_index
[GFC_MAX_DIMENSIONS
];
15599 if (!gfc_resolve_expr (var
->expr
))
15603 mpz_init_set_si (offset
, 0);
15606 if (e
->expr_type
== EXPR_FUNCTION
&& e
->value
.function
.isym
15607 && e
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
)
15608 e
= e
->value
.function
.actual
->expr
;
15610 if (e
->expr_type
!= EXPR_VARIABLE
)
15612 gfc_error ("Expecting definable entity near %L", where
);
15616 sym
= e
->symtree
->n
.sym
;
15618 if (sym
->ns
->is_block_data
&& !sym
->attr
.in_common
)
15620 gfc_error ("BLOCK DATA element %qs at %L must be in COMMON",
15621 sym
->name
, &sym
->declared_at
);
15625 if (e
->ref
== NULL
&& sym
->as
)
15627 gfc_error ("DATA array %qs at %L must be specified in a previous"
15628 " declaration", sym
->name
, where
);
15632 has_pointer
= sym
->attr
.pointer
;
15634 if (gfc_is_coindexed (e
))
15636 gfc_error ("DATA element %qs at %L cannot have a coindex", sym
->name
,
15641 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
15643 if (ref
->type
== REF_COMPONENT
&& ref
->u
.c
.component
->attr
.pointer
)
15647 && ref
->type
== REF_ARRAY
15648 && ref
->u
.ar
.type
!= AR_FULL
)
15650 gfc_error ("DATA element %qs at %L is a pointer and so must "
15651 "be a full array", sym
->name
, where
);
15656 if (e
->rank
== 0 || has_pointer
)
15658 mpz_init_set_ui (size
, 1);
15665 /* Find the array section reference. */
15666 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
15668 if (ref
->type
!= REF_ARRAY
)
15670 if (ref
->u
.ar
.type
== AR_ELEMENT
)
15676 /* Set marks according to the reference pattern. */
15677 switch (ref
->u
.ar
.type
)
15685 /* Get the start position of array section. */
15686 gfc_get_section_index (ar
, section_index
, &offset
);
15691 gcc_unreachable ();
15694 if (!gfc_array_size (e
, &size
))
15696 gfc_error ("Nonconstant array section at %L in DATA statement",
15698 mpz_clear (offset
);
15705 while (mpz_cmp_ui (size
, 0) > 0)
15707 if (!next_data_value ())
15709 gfc_error ("DATA statement at %L has more variables than values",
15715 t
= gfc_check_assign (var
->expr
, values
.vnode
->expr
, 0);
15719 /* If we have more than one element left in the repeat count,
15720 and we have more than one element left in the target variable,
15721 then create a range assignment. */
15722 /* FIXME: Only done for full arrays for now, since array sections
15724 if (mark
== AR_FULL
&& ref
&& ref
->next
== NULL
15725 && mpz_cmp_ui (values
.left
, 1) > 0 && mpz_cmp_ui (size
, 1) > 0)
15729 if (mpz_cmp (size
, values
.left
) >= 0)
15731 mpz_init_set (range
, values
.left
);
15732 mpz_sub (size
, size
, values
.left
);
15733 mpz_set_ui (values
.left
, 0);
15737 mpz_init_set (range
, size
);
15738 mpz_sub (values
.left
, values
.left
, size
);
15739 mpz_set_ui (size
, 0);
15742 t
= gfc_assign_data_value (var
->expr
, values
.vnode
->expr
,
15745 mpz_add (offset
, offset
, range
);
15752 /* Assign initial value to symbol. */
15755 mpz_sub_ui (values
.left
, values
.left
, 1);
15756 mpz_sub_ui (size
, size
, 1);
15758 t
= gfc_assign_data_value (var
->expr
, values
.vnode
->expr
,
15763 if (mark
== AR_FULL
)
15764 mpz_add_ui (offset
, offset
, 1);
15766 /* Modify the array section indexes and recalculate the offset
15767 for next element. */
15768 else if (mark
== AR_SECTION
)
15769 gfc_advance_section (section_index
, ar
, &offset
);
15773 if (mark
== AR_SECTION
)
15775 for (i
= 0; i
< ar
->dimen
; i
++)
15776 mpz_clear (section_index
[i
]);
15780 mpz_clear (offset
);
15786 static bool traverse_data_var (gfc_data_variable
*, locus
*);
15788 /* Iterate over a list of elements in a DATA statement. */
15791 traverse_data_list (gfc_data_variable
*var
, locus
*where
)
15794 iterator_stack frame
;
15795 gfc_expr
*e
, *start
, *end
, *step
;
15796 bool retval
= true;
15798 mpz_init (frame
.value
);
15801 start
= gfc_copy_expr (var
->iter
.start
);
15802 end
= gfc_copy_expr (var
->iter
.end
);
15803 step
= gfc_copy_expr (var
->iter
.step
);
15805 if (!gfc_simplify_expr (start
, 1)
15806 || start
->expr_type
!= EXPR_CONSTANT
)
15808 gfc_error ("start of implied-do loop at %L could not be "
15809 "simplified to a constant value", &start
->where
);
15813 if (!gfc_simplify_expr (end
, 1)
15814 || end
->expr_type
!= EXPR_CONSTANT
)
15816 gfc_error ("end of implied-do loop at %L could not be "
15817 "simplified to a constant value", &start
->where
);
15821 if (!gfc_simplify_expr (step
, 1)
15822 || step
->expr_type
!= EXPR_CONSTANT
)
15824 gfc_error ("step of implied-do loop at %L could not be "
15825 "simplified to a constant value", &start
->where
);
15830 mpz_set (trip
, end
->value
.integer
);
15831 mpz_sub (trip
, trip
, start
->value
.integer
);
15832 mpz_add (trip
, trip
, step
->value
.integer
);
15834 mpz_div (trip
, trip
, step
->value
.integer
);
15836 mpz_set (frame
.value
, start
->value
.integer
);
15838 frame
.prev
= iter_stack
;
15839 frame
.variable
= var
->iter
.var
->symtree
;
15840 iter_stack
= &frame
;
15842 while (mpz_cmp_ui (trip
, 0) > 0)
15844 if (!traverse_data_var (var
->list
, where
))
15850 e
= gfc_copy_expr (var
->expr
);
15851 if (!gfc_simplify_expr (e
, 1))
15858 mpz_add (frame
.value
, frame
.value
, step
->value
.integer
);
15860 mpz_sub_ui (trip
, trip
, 1);
15864 mpz_clear (frame
.value
);
15867 gfc_free_expr (start
);
15868 gfc_free_expr (end
);
15869 gfc_free_expr (step
);
15871 iter_stack
= frame
.prev
;
15876 /* Type resolve variables in the variable list of a DATA statement. */
15879 traverse_data_var (gfc_data_variable
*var
, locus
*where
)
15883 for (; var
; var
= var
->next
)
15885 if (var
->expr
== NULL
)
15886 t
= traverse_data_list (var
, where
);
15888 t
= check_data_variable (var
, where
);
15898 /* Resolve the expressions and iterators associated with a data statement.
15899 This is separate from the assignment checking because data lists should
15900 only be resolved once. */
15903 resolve_data_variables (gfc_data_variable
*d
)
15905 for (; d
; d
= d
->next
)
15907 if (d
->list
== NULL
)
15909 if (!gfc_resolve_expr (d
->expr
))
15914 if (!gfc_resolve_iterator (&d
->iter
, false, true))
15917 if (!resolve_data_variables (d
->list
))
15926 /* Resolve a single DATA statement. We implement this by storing a pointer to
15927 the value list into static variables, and then recursively traversing the
15928 variables list, expanding iterators and such. */
15931 resolve_data (gfc_data
*d
)
15934 if (!resolve_data_variables (d
->var
))
15937 values
.vnode
= d
->value
;
15938 if (d
->value
== NULL
)
15939 mpz_set_ui (values
.left
, 0);
15941 mpz_set (values
.left
, d
->value
->repeat
);
15943 if (!traverse_data_var (d
->var
, &d
->where
))
15946 /* At this point, we better not have any values left. */
15948 if (next_data_value ())
15949 gfc_error ("DATA statement at %L has more values than variables",
15954 /* 12.6 Constraint: In a pure subprogram any variable which is in common or
15955 accessed by host or use association, is a dummy argument to a pure function,
15956 is a dummy argument with INTENT (IN) to a pure subroutine, or an object that
15957 is storage associated with any such variable, shall not be used in the
15958 following contexts: (clients of this function). */
15960 /* Determines if a variable is not 'pure', i.e., not assignable within a pure
15961 procedure. Returns zero if assignment is OK, nonzero if there is a
15964 gfc_impure_variable (gfc_symbol
*sym
)
15969 if (sym
->attr
.use_assoc
|| sym
->attr
.in_common
)
15972 /* Check if the symbol's ns is inside the pure procedure. */
15973 for (ns
= gfc_current_ns
; ns
; ns
= ns
->parent
)
15977 if (ns
->proc_name
->attr
.flavor
== FL_PROCEDURE
&& !sym
->attr
.function
)
15981 proc
= sym
->ns
->proc_name
;
15982 if (sym
->attr
.dummy
15983 && ((proc
->attr
.subroutine
&& sym
->attr
.intent
== INTENT_IN
)
15984 || proc
->attr
.function
))
15987 /* TODO: Sort out what can be storage associated, if anything, and include
15988 it here. In principle equivalences should be scanned but it does not
15989 seem to be possible to storage associate an impure variable this way. */
15994 /* Test whether a symbol is pure or not. For a NULL pointer, checks if the
15995 current namespace is inside a pure procedure. */
15998 gfc_pure (gfc_symbol
*sym
)
16000 symbol_attribute attr
;
16005 /* Check if the current namespace or one of its parents
16006 belongs to a pure procedure. */
16007 for (ns
= gfc_current_ns
; ns
; ns
= ns
->parent
)
16009 sym
= ns
->proc_name
;
16013 if (attr
.flavor
== FL_PROCEDURE
&& attr
.pure
)
16021 return attr
.flavor
== FL_PROCEDURE
&& attr
.pure
;
16025 /* Test whether a symbol is implicitly pure or not. For a NULL pointer,
16026 checks if the current namespace is implicitly pure. Note that this
16027 function returns false for a PURE procedure. */
16030 gfc_implicit_pure (gfc_symbol
*sym
)
16036 /* Check if the current procedure is implicit_pure. Walk up
16037 the procedure list until we find a procedure. */
16038 for (ns
= gfc_current_ns
; ns
; ns
= ns
->parent
)
16040 sym
= ns
->proc_name
;
16044 if (sym
->attr
.flavor
== FL_PROCEDURE
)
16049 return sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.implicit_pure
16050 && !sym
->attr
.pure
;
16055 gfc_unset_implicit_pure (gfc_symbol
*sym
)
16061 /* Check if the current procedure is implicit_pure. Walk up
16062 the procedure list until we find a procedure. */
16063 for (ns
= gfc_current_ns
; ns
; ns
= ns
->parent
)
16065 sym
= ns
->proc_name
;
16069 if (sym
->attr
.flavor
== FL_PROCEDURE
)
16074 if (sym
->attr
.flavor
== FL_PROCEDURE
)
16075 sym
->attr
.implicit_pure
= 0;
16077 sym
->attr
.pure
= 0;
16081 /* Test whether the current procedure is elemental or not. */
16084 gfc_elemental (gfc_symbol
*sym
)
16086 symbol_attribute attr
;
16089 sym
= gfc_current_ns
->proc_name
;
16094 return attr
.flavor
== FL_PROCEDURE
&& attr
.elemental
;
16098 /* Warn about unused labels. */
16101 warn_unused_fortran_label (gfc_st_label
*label
)
16106 warn_unused_fortran_label (label
->left
);
16108 if (label
->defined
== ST_LABEL_UNKNOWN
)
16111 switch (label
->referenced
)
16113 case ST_LABEL_UNKNOWN
:
16114 gfc_warning (OPT_Wunused_label
, "Label %d at %L defined but not used",
16115 label
->value
, &label
->where
);
16118 case ST_LABEL_BAD_TARGET
:
16119 gfc_warning (OPT_Wunused_label
,
16120 "Label %d at %L defined but cannot be used",
16121 label
->value
, &label
->where
);
16128 warn_unused_fortran_label (label
->right
);
16132 /* Returns the sequence type of a symbol or sequence. */
16135 sequence_type (gfc_typespec ts
)
16144 if (ts
.u
.derived
->components
== NULL
)
16145 return SEQ_NONDEFAULT
;
16147 result
= sequence_type (ts
.u
.derived
->components
->ts
);
16148 for (c
= ts
.u
.derived
->components
->next
; c
; c
= c
->next
)
16149 if (sequence_type (c
->ts
) != result
)
16155 if (ts
.kind
!= gfc_default_character_kind
)
16156 return SEQ_NONDEFAULT
;
16158 return SEQ_CHARACTER
;
16161 if (ts
.kind
!= gfc_default_integer_kind
)
16162 return SEQ_NONDEFAULT
;
16164 return SEQ_NUMERIC
;
16167 if (!(ts
.kind
== gfc_default_real_kind
16168 || ts
.kind
== gfc_default_double_kind
))
16169 return SEQ_NONDEFAULT
;
16171 return SEQ_NUMERIC
;
16174 if (ts
.kind
!= gfc_default_complex_kind
)
16175 return SEQ_NONDEFAULT
;
16177 return SEQ_NUMERIC
;
16180 if (ts
.kind
!= gfc_default_logical_kind
)
16181 return SEQ_NONDEFAULT
;
16183 return SEQ_NUMERIC
;
16186 return SEQ_NONDEFAULT
;
16191 /* Resolve derived type EQUIVALENCE object. */
16194 resolve_equivalence_derived (gfc_symbol
*derived
, gfc_symbol
*sym
, gfc_expr
*e
)
16196 gfc_component
*c
= derived
->components
;
16201 /* Shall not be an object of nonsequence derived type. */
16202 if (!derived
->attr
.sequence
)
16204 gfc_error ("Derived type variable %qs at %L must have SEQUENCE "
16205 "attribute to be an EQUIVALENCE object", sym
->name
,
16210 /* Shall not have allocatable components. */
16211 if (derived
->attr
.alloc_comp
)
16213 gfc_error ("Derived type variable %qs at %L cannot have ALLOCATABLE "
16214 "components to be an EQUIVALENCE object",sym
->name
,
16219 if (sym
->attr
.in_common
&& gfc_has_default_initializer (sym
->ts
.u
.derived
))
16221 gfc_error ("Derived type variable %qs at %L with default "
16222 "initialization cannot be in EQUIVALENCE with a variable "
16223 "in COMMON", sym
->name
, &e
->where
);
16227 for (; c
; c
= c
->next
)
16229 if (gfc_bt_struct (c
->ts
.type
)
16230 && (!resolve_equivalence_derived(c
->ts
.u
.derived
, sym
, e
)))
16233 /* Shall not be an object of sequence derived type containing a pointer
16234 in the structure. */
16235 if (c
->attr
.pointer
)
16237 gfc_error ("Derived type variable %qs at %L with pointer "
16238 "component(s) cannot be an EQUIVALENCE object",
16239 sym
->name
, &e
->where
);
16247 /* Resolve equivalence object.
16248 An EQUIVALENCE object shall not be a dummy argument, a pointer, a target,
16249 an allocatable array, an object of nonsequence derived type, an object of
16250 sequence derived type containing a pointer at any level of component
16251 selection, an automatic object, a function name, an entry name, a result
16252 name, a named constant, a structure component, or a subobject of any of
16253 the preceding objects. A substring shall not have length zero. A
16254 derived type shall not have components with default initialization nor
16255 shall two objects of an equivalence group be initialized.
16256 Either all or none of the objects shall have an protected attribute.
16257 The simple constraints are done in symbol.c(check_conflict) and the rest
16258 are implemented here. */
16261 resolve_equivalence (gfc_equiv
*eq
)
16264 gfc_symbol
*first_sym
;
16267 locus
*last_where
= NULL
;
16268 seq_type eq_type
, last_eq_type
;
16269 gfc_typespec
*last_ts
;
16270 int object
, cnt_protected
;
16273 last_ts
= &eq
->expr
->symtree
->n
.sym
->ts
;
16275 first_sym
= eq
->expr
->symtree
->n
.sym
;
16279 for (object
= 1; eq
; eq
= eq
->eq
, object
++)
16283 e
->ts
= e
->symtree
->n
.sym
->ts
;
16284 /* match_varspec might not know yet if it is seeing
16285 array reference or substring reference, as it doesn't
16287 if (e
->ref
&& e
->ref
->type
== REF_ARRAY
)
16289 gfc_ref
*ref
= e
->ref
;
16290 sym
= e
->symtree
->n
.sym
;
16292 if (sym
->attr
.dimension
)
16294 ref
->u
.ar
.as
= sym
->as
;
16298 /* For substrings, convert REF_ARRAY into REF_SUBSTRING. */
16299 if (e
->ts
.type
== BT_CHARACTER
16301 && ref
->type
== REF_ARRAY
16302 && ref
->u
.ar
.dimen
== 1
16303 && ref
->u
.ar
.dimen_type
[0] == DIMEN_RANGE
16304 && ref
->u
.ar
.stride
[0] == NULL
)
16306 gfc_expr
*start
= ref
->u
.ar
.start
[0];
16307 gfc_expr
*end
= ref
->u
.ar
.end
[0];
16310 /* Optimize away the (:) reference. */
16311 if (start
== NULL
&& end
== NULL
)
16314 e
->ref
= ref
->next
;
16316 e
->ref
->next
= ref
->next
;
16321 ref
->type
= REF_SUBSTRING
;
16323 start
= gfc_get_int_expr (gfc_charlen_int_kind
,
16325 ref
->u
.ss
.start
= start
;
16326 if (end
== NULL
&& e
->ts
.u
.cl
)
16327 end
= gfc_copy_expr (e
->ts
.u
.cl
->length
);
16328 ref
->u
.ss
.end
= end
;
16329 ref
->u
.ss
.length
= e
->ts
.u
.cl
;
16336 /* Any further ref is an error. */
16339 gcc_assert (ref
->type
== REF_ARRAY
);
16340 gfc_error ("Syntax error in EQUIVALENCE statement at %L",
16346 if (!gfc_resolve_expr (e
))
16349 sym
= e
->symtree
->n
.sym
;
16351 if (sym
->attr
.is_protected
)
16353 if (cnt_protected
> 0 && cnt_protected
!= object
)
16355 gfc_error ("Either all or none of the objects in the "
16356 "EQUIVALENCE set at %L shall have the "
16357 "PROTECTED attribute",
16362 /* Shall not equivalence common block variables in a PURE procedure. */
16363 if (sym
->ns
->proc_name
16364 && sym
->ns
->proc_name
->attr
.pure
16365 && sym
->attr
.in_common
)
16367 /* Need to check for symbols that may have entered the pure
16368 procedure via a USE statement. */
16369 bool saw_sym
= false;
16370 if (sym
->ns
->use_stmts
)
16373 for (r
= sym
->ns
->use_stmts
->rename
; r
; r
= r
->next
)
16374 if (strcmp(r
->use_name
, sym
->name
) == 0) saw_sym
= true;
16380 gfc_error ("COMMON block member %qs at %L cannot be an "
16381 "EQUIVALENCE object in the pure procedure %qs",
16382 sym
->name
, &e
->where
, sym
->ns
->proc_name
->name
);
16386 /* Shall not be a named constant. */
16387 if (e
->expr_type
== EXPR_CONSTANT
)
16389 gfc_error ("Named constant %qs at %L cannot be an EQUIVALENCE "
16390 "object", sym
->name
, &e
->where
);
16394 if (e
->ts
.type
== BT_DERIVED
16395 && !resolve_equivalence_derived (e
->ts
.u
.derived
, sym
, e
))
16398 /* Check that the types correspond correctly:
16400 A numeric sequence structure may be equivalenced to another sequence
16401 structure, an object of default integer type, default real type, double
16402 precision real type, default logical type such that components of the
16403 structure ultimately only become associated to objects of the same
16404 kind. A character sequence structure may be equivalenced to an object
16405 of default character kind or another character sequence structure.
16406 Other objects may be equivalenced only to objects of the same type and
16407 kind parameters. */
16409 /* Identical types are unconditionally OK. */
16410 if (object
== 1 || gfc_compare_types (last_ts
, &sym
->ts
))
16411 goto identical_types
;
16413 last_eq_type
= sequence_type (*last_ts
);
16414 eq_type
= sequence_type (sym
->ts
);
16416 /* Since the pair of objects is not of the same type, mixed or
16417 non-default sequences can be rejected. */
16419 msg
= "Sequence %s with mixed components in EQUIVALENCE "
16420 "statement at %L with different type objects";
16422 && last_eq_type
== SEQ_MIXED
16423 && !gfc_notify_std (GFC_STD_GNU
, msg
, first_sym
->name
, last_where
))
16424 || (eq_type
== SEQ_MIXED
16425 && !gfc_notify_std (GFC_STD_GNU
, msg
, sym
->name
, &e
->where
)))
16428 msg
= "Non-default type object or sequence %s in EQUIVALENCE "
16429 "statement at %L with objects of different type";
16431 && last_eq_type
== SEQ_NONDEFAULT
16432 && !gfc_notify_std (GFC_STD_GNU
, msg
, first_sym
->name
, last_where
))
16433 || (eq_type
== SEQ_NONDEFAULT
16434 && !gfc_notify_std (GFC_STD_GNU
, msg
, sym
->name
, &e
->where
)))
16437 msg
="Non-CHARACTER object %qs in default CHARACTER "
16438 "EQUIVALENCE statement at %L";
16439 if (last_eq_type
== SEQ_CHARACTER
16440 && eq_type
!= SEQ_CHARACTER
16441 && !gfc_notify_std (GFC_STD_GNU
, msg
, sym
->name
, &e
->where
))
16444 msg
="Non-NUMERIC object %qs in default NUMERIC "
16445 "EQUIVALENCE statement at %L";
16446 if (last_eq_type
== SEQ_NUMERIC
16447 && eq_type
!= SEQ_NUMERIC
16448 && !gfc_notify_std (GFC_STD_GNU
, msg
, sym
->name
, &e
->where
))
16453 last_where
= &e
->where
;
16458 /* Shall not be an automatic array. */
16459 if (e
->ref
->type
== REF_ARRAY
16460 && !gfc_resolve_array_spec (e
->ref
->u
.ar
.as
, 1))
16462 gfc_error ("Array %qs at %L with non-constant bounds cannot be "
16463 "an EQUIVALENCE object", sym
->name
, &e
->where
);
16470 /* Shall not be a structure component. */
16471 if (r
->type
== REF_COMPONENT
)
16473 gfc_error ("Structure component %qs at %L cannot be an "
16474 "EQUIVALENCE object",
16475 r
->u
.c
.component
->name
, &e
->where
);
16479 /* A substring shall not have length zero. */
16480 if (r
->type
== REF_SUBSTRING
)
16482 if (compare_bound (r
->u
.ss
.start
, r
->u
.ss
.end
) == CMP_GT
)
16484 gfc_error ("Substring at %L has length zero",
16485 &r
->u
.ss
.start
->where
);
16495 /* Function called by resolve_fntype to flag other symbol used in the
16496 length type parameter specification of function resuls. */
16499 flag_fn_result_spec (gfc_expr
*expr
,
16501 int *f ATTRIBUTE_UNUSED
)
16506 if (expr
->expr_type
== EXPR_VARIABLE
)
16508 s
= expr
->symtree
->n
.sym
;
16509 for (ns
= s
->ns
; ns
; ns
= ns
->parent
)
16515 gfc_error ("Self reference in character length expression "
16516 "for %qs at %L", sym
->name
, &expr
->where
);
16520 if (!s
->fn_result_spec
16521 && s
->attr
.flavor
== FL_PARAMETER
)
16523 /* Function contained in a module.... */
16524 if (ns
->proc_name
&& ns
->proc_name
->attr
.flavor
== FL_MODULE
)
16527 s
->fn_result_spec
= 1;
16528 /* Make sure that this symbol is translated as a module
16530 st
= gfc_get_unique_symtree (ns
);
16534 /* ... which is use associated and called. */
16535 else if (s
->attr
.use_assoc
|| s
->attr
.used_in_submodule
16537 /* External function matched with an interface. */
16540 && s
->ns
->proc_name
->attr
.if_source
== IFSRC_DECL
)
16541 || s
->ns
->proc_name
->attr
.if_source
== IFSRC_IFBODY
)
16542 && s
->ns
->proc_name
->attr
.function
))
16543 s
->fn_result_spec
= 1;
16550 /* Resolve function and ENTRY types, issue diagnostics if needed. */
16553 resolve_fntype (gfc_namespace
*ns
)
16555 gfc_entry_list
*el
;
16558 if (ns
->proc_name
== NULL
|| !ns
->proc_name
->attr
.function
)
16561 /* If there are any entries, ns->proc_name is the entry master
16562 synthetic symbol and ns->entries->sym actual FUNCTION symbol. */
16564 sym
= ns
->entries
->sym
;
16566 sym
= ns
->proc_name
;
16567 if (sym
->result
== sym
16568 && sym
->ts
.type
== BT_UNKNOWN
16569 && !gfc_set_default_type (sym
, 0, NULL
)
16570 && !sym
->attr
.untyped
)
16572 gfc_error ("Function %qs at %L has no IMPLICIT type",
16573 sym
->name
, &sym
->declared_at
);
16574 sym
->attr
.untyped
= 1;
16577 if (sym
->ts
.type
== BT_DERIVED
&& !sym
->ts
.u
.derived
->attr
.use_assoc
16578 && !sym
->attr
.contained
16579 && !gfc_check_symbol_access (sym
->ts
.u
.derived
)
16580 && gfc_check_symbol_access (sym
))
16582 gfc_notify_std (GFC_STD_F2003
, "PUBLIC function %qs at "
16583 "%L of PRIVATE type %qs", sym
->name
,
16584 &sym
->declared_at
, sym
->ts
.u
.derived
->name
);
16588 for (el
= ns
->entries
->next
; el
; el
= el
->next
)
16590 if (el
->sym
->result
== el
->sym
16591 && el
->sym
->ts
.type
== BT_UNKNOWN
16592 && !gfc_set_default_type (el
->sym
, 0, NULL
)
16593 && !el
->sym
->attr
.untyped
)
16595 gfc_error ("ENTRY %qs at %L has no IMPLICIT type",
16596 el
->sym
->name
, &el
->sym
->declared_at
);
16597 el
->sym
->attr
.untyped
= 1;
16601 if (sym
->ts
.type
== BT_CHARACTER
)
16602 gfc_traverse_expr (sym
->ts
.u
.cl
->length
, sym
, flag_fn_result_spec
, 0);
16606 /* 12.3.2.1.1 Defined operators. */
16609 check_uop_procedure (gfc_symbol
*sym
, locus where
)
16611 gfc_formal_arglist
*formal
;
16613 if (!sym
->attr
.function
)
16615 gfc_error ("User operator procedure %qs at %L must be a FUNCTION",
16616 sym
->name
, &where
);
16620 if (sym
->ts
.type
== BT_CHARACTER
16621 && !((sym
->ts
.u
.cl
&& sym
->ts
.u
.cl
->length
) || sym
->ts
.deferred
)
16622 && !(sym
->result
&& ((sym
->result
->ts
.u
.cl
16623 && sym
->result
->ts
.u
.cl
->length
) || sym
->result
->ts
.deferred
)))
16625 gfc_error ("User operator procedure %qs at %L cannot be assumed "
16626 "character length", sym
->name
, &where
);
16630 formal
= gfc_sym_get_dummy_args (sym
);
16631 if (!formal
|| !formal
->sym
)
16633 gfc_error ("User operator procedure %qs at %L must have at least "
16634 "one argument", sym
->name
, &where
);
16638 if (formal
->sym
->attr
.intent
!= INTENT_IN
)
16640 gfc_error ("First argument of operator interface at %L must be "
16641 "INTENT(IN)", &where
);
16645 if (formal
->sym
->attr
.optional
)
16647 gfc_error ("First argument of operator interface at %L cannot be "
16648 "optional", &where
);
16652 formal
= formal
->next
;
16653 if (!formal
|| !formal
->sym
)
16656 if (formal
->sym
->attr
.intent
!= INTENT_IN
)
16658 gfc_error ("Second argument of operator interface at %L must be "
16659 "INTENT(IN)", &where
);
16663 if (formal
->sym
->attr
.optional
)
16665 gfc_error ("Second argument of operator interface at %L cannot be "
16666 "optional", &where
);
16672 gfc_error ("Operator interface at %L must have, at most, two "
16673 "arguments", &where
);
16681 gfc_resolve_uops (gfc_symtree
*symtree
)
16683 gfc_interface
*itr
;
16685 if (symtree
== NULL
)
16688 gfc_resolve_uops (symtree
->left
);
16689 gfc_resolve_uops (symtree
->right
);
16691 for (itr
= symtree
->n
.uop
->op
; itr
; itr
= itr
->next
)
16692 check_uop_procedure (itr
->sym
, itr
->sym
->declared_at
);
16696 /* Examine all of the expressions associated with a program unit,
16697 assign types to all intermediate expressions, make sure that all
16698 assignments are to compatible types and figure out which names
16699 refer to which functions or subroutines. It doesn't check code
16700 block, which is handled by gfc_resolve_code. */
16703 resolve_types (gfc_namespace
*ns
)
16709 gfc_namespace
* old_ns
= gfc_current_ns
;
16711 if (ns
->types_resolved
)
16714 /* Check that all IMPLICIT types are ok. */
16715 if (!ns
->seen_implicit_none
)
16718 for (letter
= 0; letter
!= GFC_LETTERS
; ++letter
)
16719 if (ns
->set_flag
[letter
]
16720 && !resolve_typespec_used (&ns
->default_type
[letter
],
16721 &ns
->implicit_loc
[letter
], NULL
))
16725 gfc_current_ns
= ns
;
16727 resolve_entries (ns
);
16729 resolve_common_vars (&ns
->blank_common
, false);
16730 resolve_common_blocks (ns
->common_root
);
16732 resolve_contained_functions (ns
);
16734 if (ns
->proc_name
&& ns
->proc_name
->attr
.flavor
== FL_PROCEDURE
16735 && ns
->proc_name
->attr
.if_source
== IFSRC_IFBODY
)
16736 resolve_formal_arglist (ns
->proc_name
);
16738 gfc_traverse_ns (ns
, resolve_bind_c_derived_types
);
16740 for (cl
= ns
->cl_list
; cl
; cl
= cl
->next
)
16741 resolve_charlen (cl
);
16743 gfc_traverse_ns (ns
, resolve_symbol
);
16745 resolve_fntype (ns
);
16747 for (n
= ns
->contained
; n
; n
= n
->sibling
)
16749 if (gfc_pure (ns
->proc_name
) && !gfc_pure (n
->proc_name
))
16750 gfc_error ("Contained procedure %qs at %L of a PURE procedure must "
16751 "also be PURE", n
->proc_name
->name
,
16752 &n
->proc_name
->declared_at
);
16758 gfc_do_concurrent_flag
= 0;
16759 gfc_check_interfaces (ns
);
16761 gfc_traverse_ns (ns
, resolve_values
);
16763 if (ns
->save_all
|| !flag_automatic
)
16767 for (d
= ns
->data
; d
; d
= d
->next
)
16771 gfc_traverse_ns (ns
, gfc_formalize_init_value
);
16773 gfc_traverse_ns (ns
, gfc_verify_binding_labels
);
16775 for (eq
= ns
->equiv
; eq
; eq
= eq
->next
)
16776 resolve_equivalence (eq
);
16778 /* Warn about unused labels. */
16779 if (warn_unused_label
)
16780 warn_unused_fortran_label (ns
->st_labels
);
16782 gfc_resolve_uops (ns
->uop_root
);
16784 gfc_traverse_ns (ns
, gfc_verify_DTIO_procedures
);
16786 gfc_resolve_omp_declare_simd (ns
);
16788 gfc_resolve_omp_udrs (ns
->omp_udr_root
);
16790 ns
->types_resolved
= 1;
16792 gfc_current_ns
= old_ns
;
16796 /* Call gfc_resolve_code recursively. */
16799 resolve_codes (gfc_namespace
*ns
)
16802 bitmap_obstack old_obstack
;
16804 if (ns
->resolved
== 1)
16807 for (n
= ns
->contained
; n
; n
= n
->sibling
)
16810 gfc_current_ns
= ns
;
16812 /* Don't clear 'cs_base' if this is the namespace of a BLOCK construct. */
16813 if (!(ns
->proc_name
&& ns
->proc_name
->attr
.flavor
== FL_LABEL
))
16816 /* Set to an out of range value. */
16817 current_entry_id
= -1;
16819 old_obstack
= labels_obstack
;
16820 bitmap_obstack_initialize (&labels_obstack
);
16822 gfc_resolve_oacc_declare (ns
);
16823 gfc_resolve_oacc_routines (ns
);
16824 gfc_resolve_omp_local_vars (ns
);
16825 gfc_resolve_code (ns
->code
, ns
);
16827 bitmap_obstack_release (&labels_obstack
);
16828 labels_obstack
= old_obstack
;
16832 /* This function is called after a complete program unit has been compiled.
16833 Its purpose is to examine all of the expressions associated with a program
16834 unit, assign types to all intermediate expressions, make sure that all
16835 assignments are to compatible types and figure out which names refer to
16836 which functions or subroutines. */
16839 gfc_resolve (gfc_namespace
*ns
)
16841 gfc_namespace
*old_ns
;
16842 code_stack
*old_cs_base
;
16843 struct gfc_omp_saved_state old_omp_state
;
16849 old_ns
= gfc_current_ns
;
16850 old_cs_base
= cs_base
;
16852 /* As gfc_resolve can be called during resolution of an OpenMP construct
16853 body, we should clear any state associated to it, so that say NS's
16854 DO loops are not interpreted as OpenMP loops. */
16855 if (!ns
->construct_entities
)
16856 gfc_omp_save_and_clear_state (&old_omp_state
);
16858 resolve_types (ns
);
16859 component_assignment_level
= 0;
16860 resolve_codes (ns
);
16862 gfc_current_ns
= old_ns
;
16863 cs_base
= old_cs_base
;
16866 gfc_run_passes (ns
);
16868 if (!ns
->construct_entities
)
16869 gfc_omp_restore_state (&old_omp_state
);