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
)
4715 bool class_as
= false;
4717 if (e
->symtree
->n
.sym
->ts
.type
== BT_CLASS
)
4719 as
= CLASS_DATA (e
->symtree
->n
.sym
)->as
;
4723 as
= e
->symtree
->n
.sym
->as
;
4725 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
4730 gfc_internal_error ("find_array_spec(): Missing spec");
4737 c
= ref
->u
.c
.component
;
4738 if (c
->attr
.dimension
)
4740 if (as
!= NULL
&& !(class_as
&& as
== c
->as
))
4741 gfc_internal_error ("find_array_spec(): unused as(1)");
4753 gfc_internal_error ("find_array_spec(): unused as(2)");
4757 /* Resolve an array reference. */
4760 resolve_array_ref (gfc_array_ref
*ar
)
4762 int i
, check_scalar
;
4765 for (i
= 0; i
< ar
->dimen
+ ar
->codimen
; i
++)
4767 check_scalar
= ar
->dimen_type
[i
] == DIMEN_RANGE
;
4769 /* Do not force gfc_index_integer_kind for the start. We can
4770 do fine with any integer kind. This avoids temporary arrays
4771 created for indexing with a vector. */
4772 if (!gfc_resolve_index_1 (ar
->start
[i
], check_scalar
, 0))
4774 if (!gfc_resolve_index (ar
->end
[i
], check_scalar
))
4776 if (!gfc_resolve_index (ar
->stride
[i
], check_scalar
))
4781 if (ar
->dimen_type
[i
] == DIMEN_UNKNOWN
)
4785 ar
->dimen_type
[i
] = DIMEN_ELEMENT
;
4789 ar
->dimen_type
[i
] = DIMEN_VECTOR
;
4790 if (e
->expr_type
== EXPR_VARIABLE
4791 && e
->symtree
->n
.sym
->ts
.type
== BT_DERIVED
)
4792 ar
->start
[i
] = gfc_get_parentheses (e
);
4796 gfc_error ("Array index at %L is an array of rank %d",
4797 &ar
->c_where
[i
], e
->rank
);
4801 /* Fill in the upper bound, which may be lower than the
4802 specified one for something like a(2:10:5), which is
4803 identical to a(2:7:5). Only relevant for strides not equal
4804 to one. Don't try a division by zero. */
4805 if (ar
->dimen_type
[i
] == DIMEN_RANGE
4806 && ar
->stride
[i
] != NULL
&& ar
->stride
[i
]->expr_type
== EXPR_CONSTANT
4807 && mpz_cmp_si (ar
->stride
[i
]->value
.integer
, 1L) != 0
4808 && mpz_cmp_si (ar
->stride
[i
]->value
.integer
, 0L) != 0)
4812 if (gfc_ref_dimen_size (ar
, i
, &size
, &end
))
4814 if (ar
->end
[i
] == NULL
)
4817 gfc_get_constant_expr (BT_INTEGER
, gfc_index_integer_kind
,
4819 mpz_set (ar
->end
[i
]->value
.integer
, end
);
4821 else if (ar
->end
[i
]->ts
.type
== BT_INTEGER
4822 && ar
->end
[i
]->expr_type
== EXPR_CONSTANT
)
4824 mpz_set (ar
->end
[i
]->value
.integer
, end
);
4835 if (ar
->type
== AR_FULL
)
4837 if (ar
->as
->rank
== 0)
4838 ar
->type
= AR_ELEMENT
;
4840 /* Make sure array is the same as array(:,:), this way
4841 we don't need to special case all the time. */
4842 ar
->dimen
= ar
->as
->rank
;
4843 for (i
= 0; i
< ar
->dimen
; i
++)
4845 ar
->dimen_type
[i
] = DIMEN_RANGE
;
4847 gcc_assert (ar
->start
[i
] == NULL
);
4848 gcc_assert (ar
->end
[i
] == NULL
);
4849 gcc_assert (ar
->stride
[i
] == NULL
);
4853 /* If the reference type is unknown, figure out what kind it is. */
4855 if (ar
->type
== AR_UNKNOWN
)
4857 ar
->type
= AR_ELEMENT
;
4858 for (i
= 0; i
< ar
->dimen
; i
++)
4859 if (ar
->dimen_type
[i
] == DIMEN_RANGE
4860 || ar
->dimen_type
[i
] == DIMEN_VECTOR
)
4862 ar
->type
= AR_SECTION
;
4867 if (!ar
->as
->cray_pointee
&& !compare_spec_to_ref (ar
))
4870 if (ar
->as
->corank
&& ar
->codimen
== 0)
4873 ar
->codimen
= ar
->as
->corank
;
4874 for (n
= ar
->dimen
; n
< ar
->dimen
+ ar
->codimen
; n
++)
4875 ar
->dimen_type
[n
] = DIMEN_THIS_IMAGE
;
4883 resolve_substring (gfc_ref
*ref
, bool *equal_length
)
4885 int k
= gfc_validate_kind (BT_INTEGER
, gfc_charlen_int_kind
, false);
4887 if (ref
->u
.ss
.start
!= NULL
)
4889 if (!gfc_resolve_expr (ref
->u
.ss
.start
))
4892 if (ref
->u
.ss
.start
->ts
.type
!= BT_INTEGER
)
4894 gfc_error ("Substring start index at %L must be of type INTEGER",
4895 &ref
->u
.ss
.start
->where
);
4899 if (ref
->u
.ss
.start
->rank
!= 0)
4901 gfc_error ("Substring start index at %L must be scalar",
4902 &ref
->u
.ss
.start
->where
);
4906 if (compare_bound_int (ref
->u
.ss
.start
, 1) == CMP_LT
4907 && (compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_EQ
4908 || compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_GT
))
4910 gfc_error ("Substring start index at %L is less than one",
4911 &ref
->u
.ss
.start
->where
);
4916 if (ref
->u
.ss
.end
!= NULL
)
4918 if (!gfc_resolve_expr (ref
->u
.ss
.end
))
4921 if (ref
->u
.ss
.end
->ts
.type
!= BT_INTEGER
)
4923 gfc_error ("Substring end index at %L must be of type INTEGER",
4924 &ref
->u
.ss
.end
->where
);
4928 if (ref
->u
.ss
.end
->rank
!= 0)
4930 gfc_error ("Substring end index at %L must be scalar",
4931 &ref
->u
.ss
.end
->where
);
4935 if (ref
->u
.ss
.length
!= NULL
4936 && compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.length
->length
) == CMP_GT
4937 && (compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_EQ
4938 || compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_GT
))
4940 gfc_error ("Substring end index at %L exceeds the string length",
4941 &ref
->u
.ss
.start
->where
);
4945 if (compare_bound_mpz_t (ref
->u
.ss
.end
,
4946 gfc_integer_kinds
[k
].huge
) == CMP_GT
4947 && (compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_EQ
4948 || compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_GT
))
4950 gfc_error ("Substring end index at %L is too large",
4951 &ref
->u
.ss
.end
->where
);
4954 /* If the substring has the same length as the original
4955 variable, the reference itself can be deleted. */
4957 if (ref
->u
.ss
.length
!= NULL
4958 && compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.length
->length
) == CMP_EQ
4959 && compare_bound_int (ref
->u
.ss
.start
, 1) == CMP_EQ
)
4960 *equal_length
= true;
4967 /* This function supplies missing substring charlens. */
4970 gfc_resolve_substring_charlen (gfc_expr
*e
)
4973 gfc_expr
*start
, *end
;
4974 gfc_typespec
*ts
= NULL
;
4977 for (char_ref
= e
->ref
; char_ref
; char_ref
= char_ref
->next
)
4979 if (char_ref
->type
== REF_SUBSTRING
|| char_ref
->type
== REF_INQUIRY
)
4981 if (char_ref
->type
== REF_COMPONENT
)
4982 ts
= &char_ref
->u
.c
.component
->ts
;
4985 if (!char_ref
|| char_ref
->type
== REF_INQUIRY
)
4988 gcc_assert (char_ref
->next
== NULL
);
4992 if (e
->ts
.u
.cl
->length
)
4993 gfc_free_expr (e
->ts
.u
.cl
->length
);
4994 else if (e
->expr_type
== EXPR_VARIABLE
&& e
->symtree
->n
.sym
->attr
.dummy
)
4998 e
->ts
.type
= BT_CHARACTER
;
4999 e
->ts
.kind
= gfc_default_character_kind
;
5002 e
->ts
.u
.cl
= gfc_new_charlen (gfc_current_ns
, NULL
);
5004 if (char_ref
->u
.ss
.start
)
5005 start
= gfc_copy_expr (char_ref
->u
.ss
.start
);
5007 start
= gfc_get_int_expr (gfc_charlen_int_kind
, NULL
, 1);
5009 if (char_ref
->u
.ss
.end
)
5010 end
= gfc_copy_expr (char_ref
->u
.ss
.end
);
5011 else if (e
->expr_type
== EXPR_VARIABLE
)
5014 ts
= &e
->symtree
->n
.sym
->ts
;
5015 end
= gfc_copy_expr (ts
->u
.cl
->length
);
5022 gfc_free_expr (start
);
5023 gfc_free_expr (end
);
5027 /* Length = (end - start + 1).
5028 Check first whether it has a constant length. */
5029 if (gfc_dep_difference (end
, start
, &diff
))
5031 gfc_expr
*len
= gfc_get_constant_expr (BT_INTEGER
, gfc_charlen_int_kind
,
5034 mpz_add_ui (len
->value
.integer
, diff
, 1);
5036 e
->ts
.u
.cl
->length
= len
;
5037 /* The check for length < 0 is handled below */
5041 e
->ts
.u
.cl
->length
= gfc_subtract (end
, start
);
5042 e
->ts
.u
.cl
->length
= gfc_add (e
->ts
.u
.cl
->length
,
5043 gfc_get_int_expr (gfc_charlen_int_kind
,
5047 /* F2008, 6.4.1: Both the starting point and the ending point shall
5048 be within the range 1, 2, ..., n unless the starting point exceeds
5049 the ending point, in which case the substring has length zero. */
5051 if (mpz_cmp_si (e
->ts
.u
.cl
->length
->value
.integer
, 0) < 0)
5052 mpz_set_si (e
->ts
.u
.cl
->length
->value
.integer
, 0);
5054 e
->ts
.u
.cl
->length
->ts
.type
= BT_INTEGER
;
5055 e
->ts
.u
.cl
->length
->ts
.kind
= gfc_charlen_int_kind
;
5057 /* Make sure that the length is simplified. */
5058 gfc_simplify_expr (e
->ts
.u
.cl
->length
, 1);
5059 gfc_resolve_expr (e
->ts
.u
.cl
->length
);
5063 /* Resolve subtype references. */
5066 resolve_ref (gfc_expr
*expr
)
5068 int current_part_dimension
, n_components
, seen_part_dimension
;
5069 gfc_ref
*ref
, **prev
;
5072 for (ref
= expr
->ref
; ref
; ref
= ref
->next
)
5073 if (ref
->type
== REF_ARRAY
&& ref
->u
.ar
.as
== NULL
)
5075 find_array_spec (expr
);
5079 for (prev
= &expr
->ref
; *prev
!= NULL
;
5080 prev
= *prev
== NULL
? prev
: &(*prev
)->next
)
5081 switch ((*prev
)->type
)
5084 if (!resolve_array_ref (&(*prev
)->u
.ar
))
5093 equal_length
= false;
5094 if (!resolve_substring (*prev
, &equal_length
))
5097 if (expr
->expr_type
!= EXPR_SUBSTRING
&& equal_length
)
5099 /* Remove the reference and move the charlen, if any. */
5103 expr
->ts
.u
.cl
= ref
->u
.ss
.length
;
5104 ref
->u
.ss
.length
= NULL
;
5105 gfc_free_ref_list (ref
);
5110 /* Check constraints on part references. */
5112 current_part_dimension
= 0;
5113 seen_part_dimension
= 0;
5116 for (ref
= expr
->ref
; ref
; ref
= ref
->next
)
5121 switch (ref
->u
.ar
.type
)
5124 /* Coarray scalar. */
5125 if (ref
->u
.ar
.as
->rank
== 0)
5127 current_part_dimension
= 0;
5132 current_part_dimension
= 1;
5136 current_part_dimension
= 0;
5140 gfc_internal_error ("resolve_ref(): Bad array reference");
5146 if (current_part_dimension
|| seen_part_dimension
)
5149 if (ref
->u
.c
.component
->attr
.pointer
5150 || ref
->u
.c
.component
->attr
.proc_pointer
5151 || (ref
->u
.c
.component
->ts
.type
== BT_CLASS
5152 && CLASS_DATA (ref
->u
.c
.component
)->attr
.pointer
))
5154 gfc_error ("Component to the right of a part reference "
5155 "with nonzero rank must not have the POINTER "
5156 "attribute at %L", &expr
->where
);
5159 else if (ref
->u
.c
.component
->attr
.allocatable
5160 || (ref
->u
.c
.component
->ts
.type
== BT_CLASS
5161 && CLASS_DATA (ref
->u
.c
.component
)->attr
.allocatable
))
5164 gfc_error ("Component to the right of a part reference "
5165 "with nonzero rank must not have the ALLOCATABLE "
5166 "attribute at %L", &expr
->where
);
5179 if (((ref
->type
== REF_COMPONENT
&& n_components
> 1)
5180 || ref
->next
== NULL
)
5181 && current_part_dimension
5182 && seen_part_dimension
)
5184 gfc_error ("Two or more part references with nonzero rank must "
5185 "not be specified at %L", &expr
->where
);
5189 if (ref
->type
== REF_COMPONENT
)
5191 if (current_part_dimension
)
5192 seen_part_dimension
= 1;
5194 /* reset to make sure */
5195 current_part_dimension
= 0;
5203 /* Given an expression, determine its shape. This is easier than it sounds.
5204 Leaves the shape array NULL if it is not possible to determine the shape. */
5207 expression_shape (gfc_expr
*e
)
5209 mpz_t array
[GFC_MAX_DIMENSIONS
];
5212 if (e
->rank
<= 0 || e
->shape
!= NULL
)
5215 for (i
= 0; i
< e
->rank
; i
++)
5216 if (!gfc_array_dimen_size (e
, i
, &array
[i
]))
5219 e
->shape
= gfc_get_shape (e
->rank
);
5221 memcpy (e
->shape
, array
, e
->rank
* sizeof (mpz_t
));
5226 for (i
--; i
>= 0; i
--)
5227 mpz_clear (array
[i
]);
5231 /* Given a variable expression node, compute the rank of the expression by
5232 examining the base symbol and any reference structures it may have. */
5235 expression_rank (gfc_expr
*e
)
5240 /* Just to make sure, because EXPR_COMPCALL's also have an e->ref and that
5241 could lead to serious confusion... */
5242 gcc_assert (e
->expr_type
!= EXPR_COMPCALL
);
5246 if (e
->expr_type
== EXPR_ARRAY
)
5248 /* Constructors can have a rank different from one via RESHAPE(). */
5250 if (e
->symtree
== NULL
)
5256 e
->rank
= (e
->symtree
->n
.sym
->as
== NULL
)
5257 ? 0 : e
->symtree
->n
.sym
->as
->rank
;
5263 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
5265 if (ref
->type
== REF_COMPONENT
&& ref
->u
.c
.component
->attr
.proc_pointer
5266 && ref
->u
.c
.component
->attr
.function
&& !ref
->next
)
5267 rank
= ref
->u
.c
.component
->as
? ref
->u
.c
.component
->as
->rank
: 0;
5269 if (ref
->type
!= REF_ARRAY
)
5272 if (ref
->u
.ar
.type
== AR_FULL
)
5274 rank
= ref
->u
.ar
.as
->rank
;
5278 if (ref
->u
.ar
.type
== AR_SECTION
)
5280 /* Figure out the rank of the section. */
5282 gfc_internal_error ("expression_rank(): Two array specs");
5284 for (i
= 0; i
< ref
->u
.ar
.dimen
; i
++)
5285 if (ref
->u
.ar
.dimen_type
[i
] == DIMEN_RANGE
5286 || ref
->u
.ar
.dimen_type
[i
] == DIMEN_VECTOR
)
5296 expression_shape (e
);
5301 add_caf_get_intrinsic (gfc_expr
*e
)
5303 gfc_expr
*wrapper
, *tmp_expr
;
5307 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
5308 if (ref
->type
== REF_ARRAY
&& ref
->u
.ar
.codimen
> 0)
5313 for (n
= ref
->u
.ar
.dimen
; n
< ref
->u
.ar
.dimen
+ ref
->u
.ar
.codimen
; n
++)
5314 if (ref
->u
.ar
.dimen_type
[n
] != DIMEN_ELEMENT
)
5317 tmp_expr
= XCNEW (gfc_expr
);
5319 wrapper
= gfc_build_intrinsic_call (gfc_current_ns
, GFC_ISYM_CAF_GET
,
5320 "caf_get", tmp_expr
->where
, 1, tmp_expr
);
5321 wrapper
->ts
= e
->ts
;
5322 wrapper
->rank
= e
->rank
;
5324 wrapper
->shape
= gfc_copy_shape (e
->shape
, e
->rank
);
5331 remove_caf_get_intrinsic (gfc_expr
*e
)
5333 gcc_assert (e
->expr_type
== EXPR_FUNCTION
&& e
->value
.function
.isym
5334 && e
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
);
5335 gfc_expr
*e2
= e
->value
.function
.actual
->expr
;
5336 e
->value
.function
.actual
->expr
= NULL
;
5337 gfc_free_actual_arglist (e
->value
.function
.actual
);
5338 gfc_free_shape (&e
->shape
, e
->rank
);
5344 /* Resolve a variable expression. */
5347 resolve_variable (gfc_expr
*e
)
5354 if (e
->symtree
== NULL
)
5356 sym
= e
->symtree
->n
.sym
;
5358 /* Use same check as for TYPE(*) below; this check has to be before TYPE(*)
5359 as ts.type is set to BT_ASSUMED in resolve_symbol. */
5360 if (sym
->attr
.ext_attr
& (1 << EXT_ATTR_NO_ARG_CHECK
))
5362 if (!actual_arg
|| inquiry_argument
)
5364 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute may only "
5365 "be used as actual argument", sym
->name
, &e
->where
);
5369 /* TS 29113, 407b. */
5370 else if (e
->ts
.type
== BT_ASSUMED
)
5374 gfc_error ("Assumed-type variable %s at %L may only be used "
5375 "as actual argument", sym
->name
, &e
->where
);
5378 else if (inquiry_argument
&& !first_actual_arg
)
5380 /* FIXME: It doesn't work reliably as inquiry_argument is not set
5381 for all inquiry functions in resolve_function; the reason is
5382 that the function-name resolution happens too late in that
5384 gfc_error ("Assumed-type variable %s at %L as actual argument to "
5385 "an inquiry function shall be the first argument",
5386 sym
->name
, &e
->where
);
5390 /* TS 29113, C535b. */
5391 else if ((sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
5392 && CLASS_DATA (sym
)->as
5393 && CLASS_DATA (sym
)->as
->type
== AS_ASSUMED_RANK
)
5394 || (sym
->ts
.type
!= BT_CLASS
&& sym
->as
5395 && sym
->as
->type
== AS_ASSUMED_RANK
))
5399 gfc_error ("Assumed-rank variable %s at %L may only be used as "
5400 "actual argument", sym
->name
, &e
->where
);
5403 else if (inquiry_argument
&& !first_actual_arg
)
5405 /* FIXME: It doesn't work reliably as inquiry_argument is not set
5406 for all inquiry functions in resolve_function; the reason is
5407 that the function-name resolution happens too late in that
5409 gfc_error ("Assumed-rank variable %s at %L as actual argument "
5410 "to an inquiry function shall be the first argument",
5411 sym
->name
, &e
->where
);
5416 if ((sym
->attr
.ext_attr
& (1 << EXT_ATTR_NO_ARG_CHECK
)) && e
->ref
5417 && !(e
->ref
->type
== REF_ARRAY
&& e
->ref
->u
.ar
.type
== AR_FULL
5418 && e
->ref
->next
== NULL
))
5420 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute shall not have "
5421 "a subobject reference", sym
->name
, &e
->ref
->u
.ar
.where
);
5424 /* TS 29113, 407b. */
5425 else if (e
->ts
.type
== BT_ASSUMED
&& e
->ref
5426 && !(e
->ref
->type
== REF_ARRAY
&& e
->ref
->u
.ar
.type
== AR_FULL
5427 && e
->ref
->next
== NULL
))
5429 gfc_error ("Assumed-type variable %s at %L shall not have a subobject "
5430 "reference", sym
->name
, &e
->ref
->u
.ar
.where
);
5434 /* TS 29113, C535b. */
5435 if (((sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
5436 && CLASS_DATA (sym
)->as
5437 && CLASS_DATA (sym
)->as
->type
== AS_ASSUMED_RANK
)
5438 || (sym
->ts
.type
!= BT_CLASS
&& sym
->as
5439 && sym
->as
->type
== AS_ASSUMED_RANK
))
5441 && !(e
->ref
->type
== REF_ARRAY
&& e
->ref
->u
.ar
.type
== AR_FULL
5442 && e
->ref
->next
== NULL
))
5444 gfc_error ("Assumed-rank variable %s at %L shall not have a subobject "
5445 "reference", sym
->name
, &e
->ref
->u
.ar
.where
);
5449 /* For variables that are used in an associate (target => object) where
5450 the object's basetype is array valued while the target is scalar,
5451 the ts' type of the component refs is still array valued, which
5452 can't be translated that way. */
5453 if (sym
->assoc
&& e
->rank
== 0 && e
->ref
&& sym
->ts
.type
== BT_CLASS
5454 && sym
->assoc
->target
&& sym
->assoc
->target
->ts
.type
== BT_CLASS
5455 && CLASS_DATA (sym
->assoc
->target
)->as
)
5457 gfc_ref
*ref
= e
->ref
;
5463 ref
->u
.c
.sym
= sym
->ts
.u
.derived
;
5464 /* Stop the loop. */
5474 /* If this is an associate-name, it may be parsed with an array reference
5475 in error even though the target is scalar. Fail directly in this case.
5476 TODO Understand why class scalar expressions must be excluded. */
5477 if (sym
->assoc
&& !(sym
->ts
.type
== BT_CLASS
&& e
->rank
== 0))
5479 if (sym
->ts
.type
== BT_CLASS
)
5480 gfc_fix_class_refs (e
);
5481 if (!sym
->attr
.dimension
&& e
->ref
&& e
->ref
->type
== REF_ARRAY
)
5483 else if (sym
->attr
.dimension
&& (!e
->ref
|| e
->ref
->type
!= REF_ARRAY
))
5485 /* This can happen because the parser did not detect that the
5486 associate name is an array and the expression had no array
5488 gfc_ref
*ref
= gfc_get_ref ();
5489 ref
->type
= REF_ARRAY
;
5490 ref
->u
.ar
= *gfc_get_array_ref();
5491 ref
->u
.ar
.type
= AR_FULL
;
5494 ref
->u
.ar
.as
= sym
->as
;
5495 ref
->u
.ar
.dimen
= sym
->as
->rank
;
5503 if (sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
->attr
.generic
)
5504 sym
->ts
.u
.derived
= gfc_find_dt_in_generic (sym
->ts
.u
.derived
);
5506 /* On the other hand, the parser may not have known this is an array;
5507 in this case, we have to add a FULL reference. */
5508 if (sym
->assoc
&& sym
->attr
.dimension
&& !e
->ref
)
5510 e
->ref
= gfc_get_ref ();
5511 e
->ref
->type
= REF_ARRAY
;
5512 e
->ref
->u
.ar
.type
= AR_FULL
;
5513 e
->ref
->u
.ar
.dimen
= 0;
5516 /* Like above, but for class types, where the checking whether an array
5517 ref is present is more complicated. Furthermore make sure not to add
5518 the full array ref to _vptr or _len refs. */
5519 if (sym
->assoc
&& sym
->ts
.type
== BT_CLASS
5520 && CLASS_DATA (sym
)->attr
.dimension
5521 && (e
->ts
.type
!= BT_DERIVED
|| !e
->ts
.u
.derived
->attr
.vtype
))
5523 gfc_ref
*ref
, *newref
;
5525 newref
= gfc_get_ref ();
5526 newref
->type
= REF_ARRAY
;
5527 newref
->u
.ar
.type
= AR_FULL
;
5528 newref
->u
.ar
.dimen
= 0;
5529 /* Because this is an associate var and the first ref either is a ref to
5530 the _data component or not, no traversal of the ref chain is
5531 needed. The array ref needs to be inserted after the _data ref,
5532 or when that is not present, which may happend for polymorphic
5533 types, then at the first position. */
5537 else if (ref
->type
== REF_COMPONENT
5538 && strcmp ("_data", ref
->u
.c
.component
->name
) == 0)
5540 if (!ref
->next
|| ref
->next
->type
!= REF_ARRAY
)
5542 newref
->next
= ref
->next
;
5546 /* Array ref present already. */
5547 gfc_free_ref_list (newref
);
5549 else if (ref
->type
== REF_ARRAY
)
5550 /* Array ref present already. */
5551 gfc_free_ref_list (newref
);
5559 if (e
->ref
&& !resolve_ref (e
))
5562 if (sym
->attr
.flavor
== FL_PROCEDURE
5563 && (!sym
->attr
.function
5564 || (sym
->attr
.function
&& sym
->result
5565 && sym
->result
->attr
.proc_pointer
5566 && !sym
->result
->attr
.function
)))
5568 e
->ts
.type
= BT_PROCEDURE
;
5569 goto resolve_procedure
;
5572 if (sym
->ts
.type
!= BT_UNKNOWN
)
5573 gfc_variable_attr (e
, &e
->ts
);
5574 else if (sym
->attr
.flavor
== FL_PROCEDURE
5575 && sym
->attr
.function
&& sym
->result
5576 && sym
->result
->ts
.type
!= BT_UNKNOWN
5577 && sym
->result
->attr
.proc_pointer
)
5578 e
->ts
= sym
->result
->ts
;
5581 /* Must be a simple variable reference. */
5582 if (!gfc_set_default_type (sym
, 1, sym
->ns
))
5587 if (check_assumed_size_reference (sym
, e
))
5590 /* Deal with forward references to entries during gfc_resolve_code, to
5591 satisfy, at least partially, 12.5.2.5. */
5592 if (gfc_current_ns
->entries
5593 && current_entry_id
== sym
->entry_id
5596 && cs_base
->current
->op
!= EXEC_ENTRY
)
5598 gfc_entry_list
*entry
;
5599 gfc_formal_arglist
*formal
;
5601 bool seen
, saved_specification_expr
;
5603 /* If the symbol is a dummy... */
5604 if (sym
->attr
.dummy
&& sym
->ns
== gfc_current_ns
)
5606 entry
= gfc_current_ns
->entries
;
5609 /* ...test if the symbol is a parameter of previous entries. */
5610 for (; entry
&& entry
->id
<= current_entry_id
; entry
= entry
->next
)
5611 for (formal
= entry
->sym
->formal
; formal
; formal
= formal
->next
)
5613 if (formal
->sym
&& sym
->name
== formal
->sym
->name
)
5620 /* If it has not been seen as a dummy, this is an error. */
5623 if (specification_expr
)
5624 gfc_error ("Variable %qs, used in a specification expression"
5625 ", is referenced at %L before the ENTRY statement "
5626 "in which it is a parameter",
5627 sym
->name
, &cs_base
->current
->loc
);
5629 gfc_error ("Variable %qs is used at %L before the ENTRY "
5630 "statement in which it is a parameter",
5631 sym
->name
, &cs_base
->current
->loc
);
5636 /* Now do the same check on the specification expressions. */
5637 saved_specification_expr
= specification_expr
;
5638 specification_expr
= true;
5639 if (sym
->ts
.type
== BT_CHARACTER
5640 && !gfc_resolve_expr (sym
->ts
.u
.cl
->length
))
5644 for (n
= 0; n
< sym
->as
->rank
; n
++)
5646 if (!gfc_resolve_expr (sym
->as
->lower
[n
]))
5648 if (!gfc_resolve_expr (sym
->as
->upper
[n
]))
5651 specification_expr
= saved_specification_expr
;
5654 /* Update the symbol's entry level. */
5655 sym
->entry_id
= current_entry_id
+ 1;
5658 /* If a symbol has been host_associated mark it. This is used latter,
5659 to identify if aliasing is possible via host association. */
5660 if (sym
->attr
.flavor
== FL_VARIABLE
5661 && gfc_current_ns
->parent
5662 && (gfc_current_ns
->parent
== sym
->ns
5663 || (gfc_current_ns
->parent
->parent
5664 && gfc_current_ns
->parent
->parent
== sym
->ns
)))
5665 sym
->attr
.host_assoc
= 1;
5667 if (gfc_current_ns
->proc_name
5668 && sym
->attr
.dimension
5669 && (sym
->ns
!= gfc_current_ns
5670 || sym
->attr
.use_assoc
5671 || sym
->attr
.in_common
))
5672 gfc_current_ns
->proc_name
->attr
.array_outer_dependency
= 1;
5675 if (t
&& !resolve_procedure_expression (e
))
5678 /* F2008, C617 and C1229. */
5679 if (!inquiry_argument
&& (e
->ts
.type
== BT_CLASS
|| e
->ts
.type
== BT_DERIVED
)
5680 && gfc_is_coindexed (e
))
5682 gfc_ref
*ref
, *ref2
= NULL
;
5684 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
5686 if (ref
->type
== REF_COMPONENT
)
5688 if (ref
->type
== REF_ARRAY
&& ref
->u
.ar
.codimen
> 0)
5692 for ( ; ref
; ref
= ref
->next
)
5693 if (ref
->type
== REF_COMPONENT
)
5696 /* Expression itself is not coindexed object. */
5697 if (ref
&& e
->ts
.type
== BT_CLASS
)
5699 gfc_error ("Polymorphic subobject of coindexed object at %L",
5704 /* Expression itself is coindexed object. */
5708 c
= ref2
? ref2
->u
.c
.component
: e
->symtree
->n
.sym
->components
;
5709 for ( ; c
; c
= c
->next
)
5710 if (c
->attr
.allocatable
&& c
->ts
.type
== BT_CLASS
)
5712 gfc_error ("Coindexed object with polymorphic allocatable "
5713 "subcomponent at %L", &e
->where
);
5721 expression_rank (e
);
5723 if (t
&& flag_coarray
== GFC_FCOARRAY_LIB
&& gfc_is_coindexed (e
))
5724 add_caf_get_intrinsic (e
);
5726 /* Simplify cases where access to a parameter array results in a
5727 single constant. Suppress errors since those will have been
5728 issued before, as warnings. */
5729 if (e
->rank
== 0 && sym
->as
&& sym
->attr
.flavor
== FL_PARAMETER
)
5731 gfc_push_suppress_errors ();
5732 gfc_simplify_expr (e
, 1);
5733 gfc_pop_suppress_errors ();
5740 /* Checks to see that the correct symbol has been host associated.
5741 The only situation where this arises is that in which a twice
5742 contained function is parsed after the host association is made.
5743 Therefore, on detecting this, change the symbol in the expression
5744 and convert the array reference into an actual arglist if the old
5745 symbol is a variable. */
5747 check_host_association (gfc_expr
*e
)
5749 gfc_symbol
*sym
, *old_sym
;
5753 gfc_actual_arglist
*arg
, *tail
= NULL
;
5754 bool retval
= e
->expr_type
== EXPR_FUNCTION
;
5756 /* If the expression is the result of substitution in
5757 interface.c(gfc_extend_expr) because there is no way in
5758 which the host association can be wrong. */
5759 if (e
->symtree
== NULL
5760 || e
->symtree
->n
.sym
== NULL
5761 || e
->user_operator
)
5764 old_sym
= e
->symtree
->n
.sym
;
5766 if (gfc_current_ns
->parent
5767 && old_sym
->ns
!= gfc_current_ns
)
5769 /* Use the 'USE' name so that renamed module symbols are
5770 correctly handled. */
5771 gfc_find_symbol (e
->symtree
->name
, gfc_current_ns
, 1, &sym
);
5773 if (sym
&& old_sym
!= sym
5774 && sym
->ts
.type
== old_sym
->ts
.type
5775 && sym
->attr
.flavor
== FL_PROCEDURE
5776 && sym
->attr
.contained
)
5778 /* Clear the shape, since it might not be valid. */
5779 gfc_free_shape (&e
->shape
, e
->rank
);
5781 /* Give the expression the right symtree! */
5782 gfc_find_sym_tree (e
->symtree
->name
, NULL
, 1, &st
);
5783 gcc_assert (st
!= NULL
);
5785 if (old_sym
->attr
.flavor
== FL_PROCEDURE
5786 || e
->expr_type
== EXPR_FUNCTION
)
5788 /* Original was function so point to the new symbol, since
5789 the actual argument list is already attached to the
5791 e
->value
.function
.esym
= NULL
;
5796 /* Original was variable so convert array references into
5797 an actual arglist. This does not need any checking now
5798 since resolve_function will take care of it. */
5799 e
->value
.function
.actual
= NULL
;
5800 e
->expr_type
= EXPR_FUNCTION
;
5803 /* Ambiguity will not arise if the array reference is not
5804 the last reference. */
5805 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
5806 if (ref
->type
== REF_ARRAY
&& ref
->next
== NULL
)
5809 gcc_assert (ref
->type
== REF_ARRAY
);
5811 /* Grab the start expressions from the array ref and
5812 copy them into actual arguments. */
5813 for (n
= 0; n
< ref
->u
.ar
.dimen
; n
++)
5815 arg
= gfc_get_actual_arglist ();
5816 arg
->expr
= gfc_copy_expr (ref
->u
.ar
.start
[n
]);
5817 if (e
->value
.function
.actual
== NULL
)
5818 tail
= e
->value
.function
.actual
= arg
;
5826 /* Dump the reference list and set the rank. */
5827 gfc_free_ref_list (e
->ref
);
5829 e
->rank
= sym
->as
? sym
->as
->rank
: 0;
5832 gfc_resolve_expr (e
);
5836 /* This might have changed! */
5837 return e
->expr_type
== EXPR_FUNCTION
;
5842 gfc_resolve_character_operator (gfc_expr
*e
)
5844 gfc_expr
*op1
= e
->value
.op
.op1
;
5845 gfc_expr
*op2
= e
->value
.op
.op2
;
5846 gfc_expr
*e1
= NULL
;
5847 gfc_expr
*e2
= NULL
;
5849 gcc_assert (e
->value
.op
.op
== INTRINSIC_CONCAT
);
5851 if (op1
->ts
.u
.cl
&& op1
->ts
.u
.cl
->length
)
5852 e1
= gfc_copy_expr (op1
->ts
.u
.cl
->length
);
5853 else if (op1
->expr_type
== EXPR_CONSTANT
)
5854 e1
= gfc_get_int_expr (gfc_charlen_int_kind
, NULL
,
5855 op1
->value
.character
.length
);
5857 if (op2
->ts
.u
.cl
&& op2
->ts
.u
.cl
->length
)
5858 e2
= gfc_copy_expr (op2
->ts
.u
.cl
->length
);
5859 else if (op2
->expr_type
== EXPR_CONSTANT
)
5860 e2
= gfc_get_int_expr (gfc_charlen_int_kind
, NULL
,
5861 op2
->value
.character
.length
);
5863 e
->ts
.u
.cl
= gfc_new_charlen (gfc_current_ns
, NULL
);
5873 e
->ts
.u
.cl
->length
= gfc_add (e1
, e2
);
5874 e
->ts
.u
.cl
->length
->ts
.type
= BT_INTEGER
;
5875 e
->ts
.u
.cl
->length
->ts
.kind
= gfc_charlen_int_kind
;
5876 gfc_simplify_expr (e
->ts
.u
.cl
->length
, 0);
5877 gfc_resolve_expr (e
->ts
.u
.cl
->length
);
5883 /* Ensure that an character expression has a charlen and, if possible, a
5884 length expression. */
5887 fixup_charlen (gfc_expr
*e
)
5889 /* The cases fall through so that changes in expression type and the need
5890 for multiple fixes are picked up. In all circumstances, a charlen should
5891 be available for the middle end to hang a backend_decl on. */
5892 switch (e
->expr_type
)
5895 gfc_resolve_character_operator (e
);
5899 if (e
->expr_type
== EXPR_ARRAY
)
5900 gfc_resolve_character_array_constructor (e
);
5903 case EXPR_SUBSTRING
:
5904 if (!e
->ts
.u
.cl
&& e
->ref
)
5905 gfc_resolve_substring_charlen (e
);
5910 e
->ts
.u
.cl
= gfc_new_charlen (gfc_current_ns
, NULL
);
5917 /* Update an actual argument to include the passed-object for type-bound
5918 procedures at the right position. */
5920 static gfc_actual_arglist
*
5921 update_arglist_pass (gfc_actual_arglist
* lst
, gfc_expr
* po
, unsigned argpos
,
5924 gcc_assert (argpos
> 0);
5928 gfc_actual_arglist
* result
;
5930 result
= gfc_get_actual_arglist ();
5934 result
->name
= name
;
5940 lst
->next
= update_arglist_pass (lst
->next
, po
, argpos
- 1, name
);
5942 lst
= update_arglist_pass (NULL
, po
, argpos
- 1, name
);
5947 /* Extract the passed-object from an EXPR_COMPCALL (a copy of it). */
5950 extract_compcall_passed_object (gfc_expr
* e
)
5954 if (e
->expr_type
== EXPR_UNKNOWN
)
5956 gfc_error ("Error in typebound call at %L",
5961 gcc_assert (e
->expr_type
== EXPR_COMPCALL
);
5963 if (e
->value
.compcall
.base_object
)
5964 po
= gfc_copy_expr (e
->value
.compcall
.base_object
);
5967 po
= gfc_get_expr ();
5968 po
->expr_type
= EXPR_VARIABLE
;
5969 po
->symtree
= e
->symtree
;
5970 po
->ref
= gfc_copy_ref (e
->ref
);
5971 po
->where
= e
->where
;
5974 if (!gfc_resolve_expr (po
))
5981 /* Update the arglist of an EXPR_COMPCALL expression to include the
5985 update_compcall_arglist (gfc_expr
* e
)
5988 gfc_typebound_proc
* tbp
;
5990 tbp
= e
->value
.compcall
.tbp
;
5995 po
= extract_compcall_passed_object (e
);
5999 if (tbp
->nopass
|| e
->value
.compcall
.ignore_pass
)
6005 if (tbp
->pass_arg_num
<= 0)
6008 e
->value
.compcall
.actual
= update_arglist_pass (e
->value
.compcall
.actual
, po
,
6016 /* Extract the passed object from a PPC call (a copy of it). */
6019 extract_ppc_passed_object (gfc_expr
*e
)
6024 po
= gfc_get_expr ();
6025 po
->expr_type
= EXPR_VARIABLE
;
6026 po
->symtree
= e
->symtree
;
6027 po
->ref
= gfc_copy_ref (e
->ref
);
6028 po
->where
= e
->where
;
6030 /* Remove PPC reference. */
6032 while ((*ref
)->next
)
6033 ref
= &(*ref
)->next
;
6034 gfc_free_ref_list (*ref
);
6037 if (!gfc_resolve_expr (po
))
6044 /* Update the actual arglist of a procedure pointer component to include the
6048 update_ppc_arglist (gfc_expr
* e
)
6052 gfc_typebound_proc
* tb
;
6054 ppc
= gfc_get_proc_ptr_comp (e
);
6062 else if (tb
->nopass
)
6065 po
= extract_ppc_passed_object (e
);
6072 gfc_error ("Passed-object at %L must be scalar", &e
->where
);
6077 if (po
->ts
.type
== BT_DERIVED
&& po
->ts
.u
.derived
->attr
.abstract
)
6079 gfc_error ("Base object for procedure-pointer component call at %L is of"
6080 " ABSTRACT type %qs", &e
->where
, po
->ts
.u
.derived
->name
);
6084 gcc_assert (tb
->pass_arg_num
> 0);
6085 e
->value
.compcall
.actual
= update_arglist_pass (e
->value
.compcall
.actual
, po
,
6093 /* Check that the object a TBP is called on is valid, i.e. it must not be
6094 of ABSTRACT type (as in subobject%abstract_parent%tbp()). */
6097 check_typebound_baseobject (gfc_expr
* e
)
6100 bool return_value
= false;
6102 base
= extract_compcall_passed_object (e
);
6106 if (base
->ts
.type
!= BT_DERIVED
&& base
->ts
.type
!= BT_CLASS
)
6108 gfc_error ("Error in typebound call at %L", &e
->where
);
6112 if (base
->ts
.type
== BT_CLASS
&& !gfc_expr_attr (base
).class_ok
)
6116 if (base
->ts
.type
== BT_DERIVED
&& base
->ts
.u
.derived
->attr
.abstract
)
6118 gfc_error ("Base object for type-bound procedure call at %L is of"
6119 " ABSTRACT type %qs", &e
->where
, base
->ts
.u
.derived
->name
);
6123 /* F08:C1230. If the procedure called is NOPASS,
6124 the base object must be scalar. */
6125 if (e
->value
.compcall
.tbp
->nopass
&& base
->rank
!= 0)
6127 gfc_error ("Base object for NOPASS type-bound procedure call at %L must"
6128 " be scalar", &e
->where
);
6132 return_value
= true;
6135 gfc_free_expr (base
);
6136 return return_value
;
6140 /* Resolve a call to a type-bound procedure, either function or subroutine,
6141 statically from the data in an EXPR_COMPCALL expression. The adapted
6142 arglist and the target-procedure symtree are returned. */
6145 resolve_typebound_static (gfc_expr
* e
, gfc_symtree
** target
,
6146 gfc_actual_arglist
** actual
)
6148 gcc_assert (e
->expr_type
== EXPR_COMPCALL
);
6149 gcc_assert (!e
->value
.compcall
.tbp
->is_generic
);
6151 /* Update the actual arglist for PASS. */
6152 if (!update_compcall_arglist (e
))
6155 *actual
= e
->value
.compcall
.actual
;
6156 *target
= e
->value
.compcall
.tbp
->u
.specific
;
6158 gfc_free_ref_list (e
->ref
);
6160 e
->value
.compcall
.actual
= NULL
;
6162 /* If we find a deferred typebound procedure, check for derived types
6163 that an overriding typebound procedure has not been missed. */
6164 if (e
->value
.compcall
.name
6165 && !e
->value
.compcall
.tbp
->non_overridable
6166 && e
->value
.compcall
.base_object
6167 && e
->value
.compcall
.base_object
->ts
.type
== BT_DERIVED
)
6170 gfc_symbol
*derived
;
6172 /* Use the derived type of the base_object. */
6173 derived
= e
->value
.compcall
.base_object
->ts
.u
.derived
;
6176 /* If necessary, go through the inheritance chain. */
6177 while (!st
&& derived
)
6179 /* Look for the typebound procedure 'name'. */
6180 if (derived
->f2k_derived
&& derived
->f2k_derived
->tb_sym_root
)
6181 st
= gfc_find_symtree (derived
->f2k_derived
->tb_sym_root
,
6182 e
->value
.compcall
.name
);
6184 derived
= gfc_get_derived_super_type (derived
);
6187 /* Now find the specific name in the derived type namespace. */
6188 if (st
&& st
->n
.tb
&& st
->n
.tb
->u
.specific
)
6189 gfc_find_sym_tree (st
->n
.tb
->u
.specific
->name
,
6190 derived
->ns
, 1, &st
);
6198 /* Get the ultimate declared type from an expression. In addition,
6199 return the last class/derived type reference and the copy of the
6200 reference list. If check_types is set true, derived types are
6201 identified as well as class references. */
6203 get_declared_from_expr (gfc_ref
**class_ref
, gfc_ref
**new_ref
,
6204 gfc_expr
*e
, bool check_types
)
6206 gfc_symbol
*declared
;
6213 *new_ref
= gfc_copy_ref (e
->ref
);
6215 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
6217 if (ref
->type
!= REF_COMPONENT
)
6220 if ((ref
->u
.c
.component
->ts
.type
== BT_CLASS
6221 || (check_types
&& gfc_bt_struct (ref
->u
.c
.component
->ts
.type
)))
6222 && ref
->u
.c
.component
->attr
.flavor
!= FL_PROCEDURE
)
6224 declared
= ref
->u
.c
.component
->ts
.u
.derived
;
6230 if (declared
== NULL
)
6231 declared
= e
->symtree
->n
.sym
->ts
.u
.derived
;
6237 /* Given an EXPR_COMPCALL calling a GENERIC typebound procedure, figure out
6238 which of the specific bindings (if any) matches the arglist and transform
6239 the expression into a call of that binding. */
6242 resolve_typebound_generic_call (gfc_expr
* e
, const char **name
)
6244 gfc_typebound_proc
* genproc
;
6245 const char* genname
;
6247 gfc_symbol
*derived
;
6249 gcc_assert (e
->expr_type
== EXPR_COMPCALL
);
6250 genname
= e
->value
.compcall
.name
;
6251 genproc
= e
->value
.compcall
.tbp
;
6253 if (!genproc
->is_generic
)
6256 /* Try the bindings on this type and in the inheritance hierarchy. */
6257 for (; genproc
; genproc
= genproc
->overridden
)
6261 gcc_assert (genproc
->is_generic
);
6262 for (g
= genproc
->u
.generic
; g
; g
= g
->next
)
6265 gfc_actual_arglist
* args
;
6268 gcc_assert (g
->specific
);
6270 if (g
->specific
->error
)
6273 target
= g
->specific
->u
.specific
->n
.sym
;
6275 /* Get the right arglist by handling PASS/NOPASS. */
6276 args
= gfc_copy_actual_arglist (e
->value
.compcall
.actual
);
6277 if (!g
->specific
->nopass
)
6280 po
= extract_compcall_passed_object (e
);
6283 gfc_free_actual_arglist (args
);
6287 gcc_assert (g
->specific
->pass_arg_num
> 0);
6288 gcc_assert (!g
->specific
->error
);
6289 args
= update_arglist_pass (args
, po
, g
->specific
->pass_arg_num
,
6290 g
->specific
->pass_arg
);
6292 resolve_actual_arglist (args
, target
->attr
.proc
,
6293 is_external_proc (target
)
6294 && gfc_sym_get_dummy_args (target
) == NULL
);
6296 /* Check if this arglist matches the formal. */
6297 matches
= gfc_arglist_matches_symbol (&args
, target
);
6299 /* Clean up and break out of the loop if we've found it. */
6300 gfc_free_actual_arglist (args
);
6303 e
->value
.compcall
.tbp
= g
->specific
;
6304 genname
= g
->specific_st
->name
;
6305 /* Pass along the name for CLASS methods, where the vtab
6306 procedure pointer component has to be referenced. */
6314 /* Nothing matching found! */
6315 gfc_error ("Found no matching specific binding for the call to the GENERIC"
6316 " %qs at %L", genname
, &e
->where
);
6320 /* Make sure that we have the right specific instance for the name. */
6321 derived
= get_declared_from_expr (NULL
, NULL
, e
, true);
6323 st
= gfc_find_typebound_proc (derived
, NULL
, genname
, true, &e
->where
);
6325 e
->value
.compcall
.tbp
= st
->n
.tb
;
6331 /* Resolve a call to a type-bound subroutine. */
6334 resolve_typebound_call (gfc_code
* c
, const char **name
, bool *overridable
)
6336 gfc_actual_arglist
* newactual
;
6337 gfc_symtree
* target
;
6339 /* Check that's really a SUBROUTINE. */
6340 if (!c
->expr1
->value
.compcall
.tbp
->subroutine
)
6342 if (!c
->expr1
->value
.compcall
.tbp
->is_generic
6343 && c
->expr1
->value
.compcall
.tbp
->u
.specific
6344 && c
->expr1
->value
.compcall
.tbp
->u
.specific
->n
.sym
6345 && c
->expr1
->value
.compcall
.tbp
->u
.specific
->n
.sym
->attr
.subroutine
)
6346 c
->expr1
->value
.compcall
.tbp
->subroutine
= 1;
6349 gfc_error ("%qs at %L should be a SUBROUTINE",
6350 c
->expr1
->value
.compcall
.name
, &c
->loc
);
6355 if (!check_typebound_baseobject (c
->expr1
))
6358 /* Pass along the name for CLASS methods, where the vtab
6359 procedure pointer component has to be referenced. */
6361 *name
= c
->expr1
->value
.compcall
.name
;
6363 if (!resolve_typebound_generic_call (c
->expr1
, name
))
6366 /* Pass along the NON_OVERRIDABLE attribute of the specific TBP. */
6368 *overridable
= !c
->expr1
->value
.compcall
.tbp
->non_overridable
;
6370 /* Transform into an ordinary EXEC_CALL for now. */
6372 if (!resolve_typebound_static (c
->expr1
, &target
, &newactual
))
6375 c
->ext
.actual
= newactual
;
6376 c
->symtree
= target
;
6377 c
->op
= (c
->expr1
->value
.compcall
.assign
? EXEC_ASSIGN_CALL
: EXEC_CALL
);
6379 gcc_assert (!c
->expr1
->ref
&& !c
->expr1
->value
.compcall
.actual
);
6381 gfc_free_expr (c
->expr1
);
6382 c
->expr1
= gfc_get_expr ();
6383 c
->expr1
->expr_type
= EXPR_FUNCTION
;
6384 c
->expr1
->symtree
= target
;
6385 c
->expr1
->where
= c
->loc
;
6387 return resolve_call (c
);
6391 /* Resolve a component-call expression. */
6393 resolve_compcall (gfc_expr
* e
, const char **name
)
6395 gfc_actual_arglist
* newactual
;
6396 gfc_symtree
* target
;
6398 /* Check that's really a FUNCTION. */
6399 if (!e
->value
.compcall
.tbp
->function
)
6401 gfc_error ("%qs at %L should be a FUNCTION",
6402 e
->value
.compcall
.name
, &e
->where
);
6406 /* These must not be assign-calls! */
6407 gcc_assert (!e
->value
.compcall
.assign
);
6409 if (!check_typebound_baseobject (e
))
6412 /* Pass along the name for CLASS methods, where the vtab
6413 procedure pointer component has to be referenced. */
6415 *name
= e
->value
.compcall
.name
;
6417 if (!resolve_typebound_generic_call (e
, name
))
6419 gcc_assert (!e
->value
.compcall
.tbp
->is_generic
);
6421 /* Take the rank from the function's symbol. */
6422 if (e
->value
.compcall
.tbp
->u
.specific
->n
.sym
->as
)
6423 e
->rank
= e
->value
.compcall
.tbp
->u
.specific
->n
.sym
->as
->rank
;
6425 /* For now, we simply transform it into an EXPR_FUNCTION call with the same
6426 arglist to the TBP's binding target. */
6428 if (!resolve_typebound_static (e
, &target
, &newactual
))
6431 e
->value
.function
.actual
= newactual
;
6432 e
->value
.function
.name
= NULL
;
6433 e
->value
.function
.esym
= target
->n
.sym
;
6434 e
->value
.function
.isym
= NULL
;
6435 e
->symtree
= target
;
6436 e
->ts
= target
->n
.sym
->ts
;
6437 e
->expr_type
= EXPR_FUNCTION
;
6439 /* Resolution is not necessary if this is a class subroutine; this
6440 function only has to identify the specific proc. Resolution of
6441 the call will be done next in resolve_typebound_call. */
6442 return gfc_resolve_expr (e
);
6446 static bool resolve_fl_derived (gfc_symbol
*sym
);
6449 /* Resolve a typebound function, or 'method'. First separate all
6450 the non-CLASS references by calling resolve_compcall directly. */
6453 resolve_typebound_function (gfc_expr
* e
)
6455 gfc_symbol
*declared
;
6467 /* Deal with typebound operators for CLASS objects. */
6468 expr
= e
->value
.compcall
.base_object
;
6469 overridable
= !e
->value
.compcall
.tbp
->non_overridable
;
6470 if (expr
&& expr
->ts
.type
== BT_CLASS
&& e
->value
.compcall
.name
)
6472 /* If the base_object is not a variable, the corresponding actual
6473 argument expression must be stored in e->base_expression so
6474 that the corresponding tree temporary can be used as the base
6475 object in gfc_conv_procedure_call. */
6476 if (expr
->expr_type
!= EXPR_VARIABLE
)
6478 gfc_actual_arglist
*args
;
6480 for (args
= e
->value
.function
.actual
; args
; args
= args
->next
)
6482 if (expr
== args
->expr
)
6487 /* Since the typebound operators are generic, we have to ensure
6488 that any delays in resolution are corrected and that the vtab
6491 declared
= ts
.u
.derived
;
6492 c
= gfc_find_component (declared
, "_vptr", true, true, NULL
);
6493 if (c
->ts
.u
.derived
== NULL
)
6494 c
->ts
.u
.derived
= gfc_find_derived_vtab (declared
);
6496 if (!resolve_compcall (e
, &name
))
6499 /* Use the generic name if it is there. */
6500 name
= name
? name
: e
->value
.function
.esym
->name
;
6501 e
->symtree
= expr
->symtree
;
6502 e
->ref
= gfc_copy_ref (expr
->ref
);
6503 get_declared_from_expr (&class_ref
, NULL
, e
, false);
6505 /* Trim away the extraneous references that emerge from nested
6506 use of interface.c (extend_expr). */
6507 if (class_ref
&& class_ref
->next
)
6509 gfc_free_ref_list (class_ref
->next
);
6510 class_ref
->next
= NULL
;
6512 else if (e
->ref
&& !class_ref
&& expr
->ts
.type
!= BT_CLASS
)
6514 gfc_free_ref_list (e
->ref
);
6518 gfc_add_vptr_component (e
);
6519 gfc_add_component_ref (e
, name
);
6520 e
->value
.function
.esym
= NULL
;
6521 if (expr
->expr_type
!= EXPR_VARIABLE
)
6522 e
->base_expr
= expr
;
6527 return resolve_compcall (e
, NULL
);
6529 if (!resolve_ref (e
))
6532 /* Get the CLASS declared type. */
6533 declared
= get_declared_from_expr (&class_ref
, &new_ref
, e
, true);
6535 if (!resolve_fl_derived (declared
))
6538 /* Weed out cases of the ultimate component being a derived type. */
6539 if ((class_ref
&& gfc_bt_struct (class_ref
->u
.c
.component
->ts
.type
))
6540 || (!class_ref
&& st
->n
.sym
->ts
.type
!= BT_CLASS
))
6542 gfc_free_ref_list (new_ref
);
6543 return resolve_compcall (e
, NULL
);
6546 c
= gfc_find_component (declared
, "_data", true, true, NULL
);
6547 declared
= c
->ts
.u
.derived
;
6549 /* Treat the call as if it is a typebound procedure, in order to roll
6550 out the correct name for the specific function. */
6551 if (!resolve_compcall (e
, &name
))
6553 gfc_free_ref_list (new_ref
);
6560 /* Convert the expression to a procedure pointer component call. */
6561 e
->value
.function
.esym
= NULL
;
6567 /* '_vptr' points to the vtab, which contains the procedure pointers. */
6568 gfc_add_vptr_component (e
);
6569 gfc_add_component_ref (e
, name
);
6571 /* Recover the typespec for the expression. This is really only
6572 necessary for generic procedures, where the additional call
6573 to gfc_add_component_ref seems to throw the collection of the
6574 correct typespec. */
6578 gfc_free_ref_list (new_ref
);
6583 /* Resolve a typebound subroutine, or 'method'. First separate all
6584 the non-CLASS references by calling resolve_typebound_call
6588 resolve_typebound_subroutine (gfc_code
*code
)
6590 gfc_symbol
*declared
;
6600 st
= code
->expr1
->symtree
;
6602 /* Deal with typebound operators for CLASS objects. */
6603 expr
= code
->expr1
->value
.compcall
.base_object
;
6604 overridable
= !code
->expr1
->value
.compcall
.tbp
->non_overridable
;
6605 if (expr
&& expr
->ts
.type
== BT_CLASS
&& code
->expr1
->value
.compcall
.name
)
6607 /* If the base_object is not a variable, the corresponding actual
6608 argument expression must be stored in e->base_expression so
6609 that the corresponding tree temporary can be used as the base
6610 object in gfc_conv_procedure_call. */
6611 if (expr
->expr_type
!= EXPR_VARIABLE
)
6613 gfc_actual_arglist
*args
;
6615 args
= code
->expr1
->value
.function
.actual
;
6616 for (; args
; args
= args
->next
)
6617 if (expr
== args
->expr
)
6621 /* Since the typebound operators are generic, we have to ensure
6622 that any delays in resolution are corrected and that the vtab
6624 declared
= expr
->ts
.u
.derived
;
6625 c
= gfc_find_component (declared
, "_vptr", true, true, NULL
);
6626 if (c
->ts
.u
.derived
== NULL
)
6627 c
->ts
.u
.derived
= gfc_find_derived_vtab (declared
);
6629 if (!resolve_typebound_call (code
, &name
, NULL
))
6632 /* Use the generic name if it is there. */
6633 name
= name
? name
: code
->expr1
->value
.function
.esym
->name
;
6634 code
->expr1
->symtree
= expr
->symtree
;
6635 code
->expr1
->ref
= gfc_copy_ref (expr
->ref
);
6637 /* Trim away the extraneous references that emerge from nested
6638 use of interface.c (extend_expr). */
6639 get_declared_from_expr (&class_ref
, NULL
, code
->expr1
, false);
6640 if (class_ref
&& class_ref
->next
)
6642 gfc_free_ref_list (class_ref
->next
);
6643 class_ref
->next
= NULL
;
6645 else if (code
->expr1
->ref
&& !class_ref
)
6647 gfc_free_ref_list (code
->expr1
->ref
);
6648 code
->expr1
->ref
= NULL
;
6651 /* Now use the procedure in the vtable. */
6652 gfc_add_vptr_component (code
->expr1
);
6653 gfc_add_component_ref (code
->expr1
, name
);
6654 code
->expr1
->value
.function
.esym
= NULL
;
6655 if (expr
->expr_type
!= EXPR_VARIABLE
)
6656 code
->expr1
->base_expr
= expr
;
6661 return resolve_typebound_call (code
, NULL
, NULL
);
6663 if (!resolve_ref (code
->expr1
))
6666 /* Get the CLASS declared type. */
6667 get_declared_from_expr (&class_ref
, &new_ref
, code
->expr1
, true);
6669 /* Weed out cases of the ultimate component being a derived type. */
6670 if ((class_ref
&& gfc_bt_struct (class_ref
->u
.c
.component
->ts
.type
))
6671 || (!class_ref
&& st
->n
.sym
->ts
.type
!= BT_CLASS
))
6673 gfc_free_ref_list (new_ref
);
6674 return resolve_typebound_call (code
, NULL
, NULL
);
6677 if (!resolve_typebound_call (code
, &name
, &overridable
))
6679 gfc_free_ref_list (new_ref
);
6682 ts
= code
->expr1
->ts
;
6686 /* Convert the expression to a procedure pointer component call. */
6687 code
->expr1
->value
.function
.esym
= NULL
;
6688 code
->expr1
->symtree
= st
;
6691 code
->expr1
->ref
= new_ref
;
6693 /* '_vptr' points to the vtab, which contains the procedure pointers. */
6694 gfc_add_vptr_component (code
->expr1
);
6695 gfc_add_component_ref (code
->expr1
, name
);
6697 /* Recover the typespec for the expression. This is really only
6698 necessary for generic procedures, where the additional call
6699 to gfc_add_component_ref seems to throw the collection of the
6700 correct typespec. */
6701 code
->expr1
->ts
= ts
;
6704 gfc_free_ref_list (new_ref
);
6710 /* Resolve a CALL to a Procedure Pointer Component (Subroutine). */
6713 resolve_ppc_call (gfc_code
* c
)
6715 gfc_component
*comp
;
6717 comp
= gfc_get_proc_ptr_comp (c
->expr1
);
6718 gcc_assert (comp
!= NULL
);
6720 c
->resolved_sym
= c
->expr1
->symtree
->n
.sym
;
6721 c
->expr1
->expr_type
= EXPR_VARIABLE
;
6723 if (!comp
->attr
.subroutine
)
6724 gfc_add_subroutine (&comp
->attr
, comp
->name
, &c
->expr1
->where
);
6726 if (!resolve_ref (c
->expr1
))
6729 if (!update_ppc_arglist (c
->expr1
))
6732 c
->ext
.actual
= c
->expr1
->value
.compcall
.actual
;
6734 if (!resolve_actual_arglist (c
->ext
.actual
, comp
->attr
.proc
,
6735 !(comp
->ts
.interface
6736 && comp
->ts
.interface
->formal
)))
6739 if (!pure_subroutine (comp
->ts
.interface
, comp
->name
, &c
->expr1
->where
))
6742 gfc_ppc_use (comp
, &c
->expr1
->value
.compcall
.actual
, &c
->expr1
->where
);
6748 /* Resolve a Function Call to a Procedure Pointer Component (Function). */
6751 resolve_expr_ppc (gfc_expr
* e
)
6753 gfc_component
*comp
;
6755 comp
= gfc_get_proc_ptr_comp (e
);
6756 gcc_assert (comp
!= NULL
);
6758 /* Convert to EXPR_FUNCTION. */
6759 e
->expr_type
= EXPR_FUNCTION
;
6760 e
->value
.function
.isym
= NULL
;
6761 e
->value
.function
.actual
= e
->value
.compcall
.actual
;
6763 if (comp
->as
!= NULL
)
6764 e
->rank
= comp
->as
->rank
;
6766 if (!comp
->attr
.function
)
6767 gfc_add_function (&comp
->attr
, comp
->name
, &e
->where
);
6769 if (!resolve_ref (e
))
6772 if (!resolve_actual_arglist (e
->value
.function
.actual
, comp
->attr
.proc
,
6773 !(comp
->ts
.interface
6774 && comp
->ts
.interface
->formal
)))
6777 if (!update_ppc_arglist (e
))
6780 if (!check_pure_function(e
))
6783 gfc_ppc_use (comp
, &e
->value
.compcall
.actual
, &e
->where
);
6790 gfc_is_expandable_expr (gfc_expr
*e
)
6792 gfc_constructor
*con
;
6794 if (e
->expr_type
== EXPR_ARRAY
)
6796 /* Traverse the constructor looking for variables that are flavor
6797 parameter. Parameters must be expanded since they are fully used at
6799 con
= gfc_constructor_first (e
->value
.constructor
);
6800 for (; con
; con
= gfc_constructor_next (con
))
6802 if (con
->expr
->expr_type
== EXPR_VARIABLE
6803 && con
->expr
->symtree
6804 && (con
->expr
->symtree
->n
.sym
->attr
.flavor
== FL_PARAMETER
6805 || con
->expr
->symtree
->n
.sym
->attr
.flavor
== FL_VARIABLE
))
6807 if (con
->expr
->expr_type
== EXPR_ARRAY
6808 && gfc_is_expandable_expr (con
->expr
))
6817 /* Sometimes variables in specification expressions of the result
6818 of module procedures in submodules wind up not being the 'real'
6819 dummy. Find this, if possible, in the namespace of the first
6823 fixup_unique_dummy (gfc_expr
*e
)
6825 gfc_symtree
*st
= NULL
;
6826 gfc_symbol
*s
= NULL
;
6828 if (e
->symtree
->n
.sym
->ns
->proc_name
6829 && e
->symtree
->n
.sym
->ns
->proc_name
->formal
)
6830 s
= e
->symtree
->n
.sym
->ns
->proc_name
->formal
->sym
;
6833 st
= gfc_find_symtree (s
->ns
->sym_root
, e
->symtree
->n
.sym
->name
);
6836 && st
->n
.sym
!= NULL
6837 && st
->n
.sym
->attr
.dummy
)
6841 /* Resolve an expression. That is, make sure that types of operands agree
6842 with their operators, intrinsic operators are converted to function calls
6843 for overloaded types and unresolved function references are resolved. */
6846 gfc_resolve_expr (gfc_expr
*e
)
6849 bool inquiry_save
, actual_arg_save
, first_actual_arg_save
;
6854 /* inquiry_argument only applies to variables. */
6855 inquiry_save
= inquiry_argument
;
6856 actual_arg_save
= actual_arg
;
6857 first_actual_arg_save
= first_actual_arg
;
6859 if (e
->expr_type
!= EXPR_VARIABLE
)
6861 inquiry_argument
= false;
6863 first_actual_arg
= false;
6865 else if (e
->symtree
!= NULL
6866 && *e
->symtree
->name
== '@'
6867 && e
->symtree
->n
.sym
->attr
.dummy
)
6869 /* Deal with submodule specification expressions that are not
6870 found to be referenced in module.c(read_cleanup). */
6871 fixup_unique_dummy (e
);
6874 switch (e
->expr_type
)
6877 t
= resolve_operator (e
);
6883 if (check_host_association (e
))
6884 t
= resolve_function (e
);
6886 t
= resolve_variable (e
);
6888 if (e
->ts
.type
== BT_CHARACTER
&& e
->ts
.u
.cl
== NULL
&& e
->ref
6889 && e
->ref
->type
!= REF_SUBSTRING
)
6890 gfc_resolve_substring_charlen (e
);
6895 t
= resolve_typebound_function (e
);
6898 case EXPR_SUBSTRING
:
6899 t
= resolve_ref (e
);
6908 t
= resolve_expr_ppc (e
);
6913 if (!resolve_ref (e
))
6916 t
= gfc_resolve_array_constructor (e
);
6917 /* Also try to expand a constructor. */
6920 expression_rank (e
);
6921 if (gfc_is_constant_expr (e
) || gfc_is_expandable_expr (e
))
6922 gfc_expand_constructor (e
, false);
6925 /* This provides the opportunity for the length of constructors with
6926 character valued function elements to propagate the string length
6927 to the expression. */
6928 if (t
&& e
->ts
.type
== BT_CHARACTER
)
6930 /* For efficiency, we call gfc_expand_constructor for BT_CHARACTER
6931 here rather then add a duplicate test for it above. */
6932 gfc_expand_constructor (e
, false);
6933 t
= gfc_resolve_character_array_constructor (e
);
6938 case EXPR_STRUCTURE
:
6939 t
= resolve_ref (e
);
6943 t
= resolve_structure_cons (e
, 0);
6947 t
= gfc_simplify_expr (e
, 0);
6951 gfc_internal_error ("gfc_resolve_expr(): Bad expression type");
6954 if (e
->ts
.type
== BT_CHARACTER
&& t
&& !e
->ts
.u
.cl
)
6957 inquiry_argument
= inquiry_save
;
6958 actual_arg
= actual_arg_save
;
6959 first_actual_arg
= first_actual_arg_save
;
6965 /* Resolve an expression from an iterator. They must be scalar and have
6966 INTEGER or (optionally) REAL type. */
6969 gfc_resolve_iterator_expr (gfc_expr
*expr
, bool real_ok
,
6970 const char *name_msgid
)
6972 if (!gfc_resolve_expr (expr
))
6975 if (expr
->rank
!= 0)
6977 gfc_error ("%s at %L must be a scalar", _(name_msgid
), &expr
->where
);
6981 if (expr
->ts
.type
!= BT_INTEGER
)
6983 if (expr
->ts
.type
== BT_REAL
)
6986 return gfc_notify_std (GFC_STD_F95_DEL
,
6987 "%s at %L must be integer",
6988 _(name_msgid
), &expr
->where
);
6991 gfc_error ("%s at %L must be INTEGER", _(name_msgid
),
6998 gfc_error ("%s at %L must be INTEGER", _(name_msgid
), &expr
->where
);
7006 /* Resolve the expressions in an iterator structure. If REAL_OK is
7007 false allow only INTEGER type iterators, otherwise allow REAL types.
7008 Set own_scope to true for ac-implied-do and data-implied-do as those
7009 have a separate scope such that, e.g., a INTENT(IN) doesn't apply. */
7012 gfc_resolve_iterator (gfc_iterator
*iter
, bool real_ok
, bool own_scope
)
7014 if (!gfc_resolve_iterator_expr (iter
->var
, real_ok
, "Loop variable"))
7017 if (!gfc_check_vardef_context (iter
->var
, false, false, own_scope
,
7018 _("iterator variable")))
7021 if (!gfc_resolve_iterator_expr (iter
->start
, real_ok
,
7022 "Start expression in DO loop"))
7025 if (!gfc_resolve_iterator_expr (iter
->end
, real_ok
,
7026 "End expression in DO loop"))
7029 if (!gfc_resolve_iterator_expr (iter
->step
, real_ok
,
7030 "Step expression in DO loop"))
7033 if (iter
->step
->expr_type
== EXPR_CONSTANT
)
7035 if ((iter
->step
->ts
.type
== BT_INTEGER
7036 && mpz_cmp_ui (iter
->step
->value
.integer
, 0) == 0)
7037 || (iter
->step
->ts
.type
== BT_REAL
7038 && mpfr_sgn (iter
->step
->value
.real
) == 0))
7040 gfc_error ("Step expression in DO loop at %L cannot be zero",
7041 &iter
->step
->where
);
7046 /* Convert start, end, and step to the same type as var. */
7047 if (iter
->start
->ts
.kind
!= iter
->var
->ts
.kind
7048 || iter
->start
->ts
.type
!= iter
->var
->ts
.type
)
7049 gfc_convert_type (iter
->start
, &iter
->var
->ts
, 1);
7051 if (iter
->end
->ts
.kind
!= iter
->var
->ts
.kind
7052 || iter
->end
->ts
.type
!= iter
->var
->ts
.type
)
7053 gfc_convert_type (iter
->end
, &iter
->var
->ts
, 1);
7055 if (iter
->step
->ts
.kind
!= iter
->var
->ts
.kind
7056 || iter
->step
->ts
.type
!= iter
->var
->ts
.type
)
7057 gfc_convert_type (iter
->step
, &iter
->var
->ts
, 1);
7059 if (iter
->start
->expr_type
== EXPR_CONSTANT
7060 && iter
->end
->expr_type
== EXPR_CONSTANT
7061 && iter
->step
->expr_type
== EXPR_CONSTANT
)
7064 if (iter
->start
->ts
.type
== BT_INTEGER
)
7066 sgn
= mpz_cmp_ui (iter
->step
->value
.integer
, 0);
7067 cmp
= mpz_cmp (iter
->end
->value
.integer
, iter
->start
->value
.integer
);
7071 sgn
= mpfr_sgn (iter
->step
->value
.real
);
7072 cmp
= mpfr_cmp (iter
->end
->value
.real
, iter
->start
->value
.real
);
7074 if (warn_zerotrip
&& ((sgn
> 0 && cmp
< 0) || (sgn
< 0 && cmp
> 0)))
7075 gfc_warning (OPT_Wzerotrip
,
7076 "DO loop at %L will be executed zero times",
7077 &iter
->step
->where
);
7080 if (iter
->end
->expr_type
== EXPR_CONSTANT
7081 && iter
->end
->ts
.type
== BT_INTEGER
7082 && iter
->step
->expr_type
== EXPR_CONSTANT
7083 && iter
->step
->ts
.type
== BT_INTEGER
7084 && (mpz_cmp_si (iter
->step
->value
.integer
, -1L) == 0
7085 || mpz_cmp_si (iter
->step
->value
.integer
, 1L) == 0))
7087 bool is_step_positive
= mpz_cmp_ui (iter
->step
->value
.integer
, 1) == 0;
7088 int k
= gfc_validate_kind (BT_INTEGER
, iter
->end
->ts
.kind
, false);
7090 if (is_step_positive
7091 && mpz_cmp (iter
->end
->value
.integer
, gfc_integer_kinds
[k
].huge
) == 0)
7092 gfc_warning (OPT_Wundefined_do_loop
,
7093 "DO loop at %L is undefined as it overflows",
7094 &iter
->step
->where
);
7095 else if (!is_step_positive
7096 && mpz_cmp (iter
->end
->value
.integer
,
7097 gfc_integer_kinds
[k
].min_int
) == 0)
7098 gfc_warning (OPT_Wundefined_do_loop
,
7099 "DO loop at %L is undefined as it underflows",
7100 &iter
->step
->where
);
7107 /* Traversal function for find_forall_index. f == 2 signals that
7108 that variable itself is not to be checked - only the references. */
7111 forall_index (gfc_expr
*expr
, gfc_symbol
*sym
, int *f
)
7113 if (expr
->expr_type
!= EXPR_VARIABLE
)
7116 /* A scalar assignment */
7117 if (!expr
->ref
|| *f
== 1)
7119 if (expr
->symtree
->n
.sym
== sym
)
7131 /* Check whether the FORALL index appears in the expression or not.
7132 Returns true if SYM is found in EXPR. */
7135 find_forall_index (gfc_expr
*expr
, gfc_symbol
*sym
, int f
)
7137 if (gfc_traverse_expr (expr
, sym
, forall_index
, f
))
7144 /* Resolve a list of FORALL iterators. The FORALL index-name is constrained
7145 to be a scalar INTEGER variable. The subscripts and stride are scalar
7146 INTEGERs, and if stride is a constant it must be nonzero.
7147 Furthermore "A subscript or stride in a forall-triplet-spec shall
7148 not contain a reference to any index-name in the
7149 forall-triplet-spec-list in which it appears." (7.5.4.1) */
7152 resolve_forall_iterators (gfc_forall_iterator
*it
)
7154 gfc_forall_iterator
*iter
, *iter2
;
7156 for (iter
= it
; iter
; iter
= iter
->next
)
7158 if (gfc_resolve_expr (iter
->var
)
7159 && (iter
->var
->ts
.type
!= BT_INTEGER
|| iter
->var
->rank
!= 0))
7160 gfc_error ("FORALL index-name at %L must be a scalar INTEGER",
7163 if (gfc_resolve_expr (iter
->start
)
7164 && (iter
->start
->ts
.type
!= BT_INTEGER
|| iter
->start
->rank
!= 0))
7165 gfc_error ("FORALL start expression at %L must be a scalar INTEGER",
7166 &iter
->start
->where
);
7167 if (iter
->var
->ts
.kind
!= iter
->start
->ts
.kind
)
7168 gfc_convert_type (iter
->start
, &iter
->var
->ts
, 1);
7170 if (gfc_resolve_expr (iter
->end
)
7171 && (iter
->end
->ts
.type
!= BT_INTEGER
|| iter
->end
->rank
!= 0))
7172 gfc_error ("FORALL end expression at %L must be a scalar INTEGER",
7174 if (iter
->var
->ts
.kind
!= iter
->end
->ts
.kind
)
7175 gfc_convert_type (iter
->end
, &iter
->var
->ts
, 1);
7177 if (gfc_resolve_expr (iter
->stride
))
7179 if (iter
->stride
->ts
.type
!= BT_INTEGER
|| iter
->stride
->rank
!= 0)
7180 gfc_error ("FORALL stride expression at %L must be a scalar %s",
7181 &iter
->stride
->where
, "INTEGER");
7183 if (iter
->stride
->expr_type
== EXPR_CONSTANT
7184 && mpz_cmp_ui (iter
->stride
->value
.integer
, 0) == 0)
7185 gfc_error ("FORALL stride expression at %L cannot be zero",
7186 &iter
->stride
->where
);
7188 if (iter
->var
->ts
.kind
!= iter
->stride
->ts
.kind
)
7189 gfc_convert_type (iter
->stride
, &iter
->var
->ts
, 1);
7192 for (iter
= it
; iter
; iter
= iter
->next
)
7193 for (iter2
= iter
; iter2
; iter2
= iter2
->next
)
7195 if (find_forall_index (iter2
->start
, iter
->var
->symtree
->n
.sym
, 0)
7196 || find_forall_index (iter2
->end
, iter
->var
->symtree
->n
.sym
, 0)
7197 || find_forall_index (iter2
->stride
, iter
->var
->symtree
->n
.sym
, 0))
7198 gfc_error ("FORALL index %qs may not appear in triplet "
7199 "specification at %L", iter
->var
->symtree
->name
,
7200 &iter2
->start
->where
);
7205 /* Given a pointer to a symbol that is a derived type, see if it's
7206 inaccessible, i.e. if it's defined in another module and the components are
7207 PRIVATE. The search is recursive if necessary. Returns zero if no
7208 inaccessible components are found, nonzero otherwise. */
7211 derived_inaccessible (gfc_symbol
*sym
)
7215 if (sym
->attr
.use_assoc
&& sym
->attr
.private_comp
)
7218 for (c
= sym
->components
; c
; c
= c
->next
)
7220 /* Prevent an infinite loop through this function. */
7221 if (c
->ts
.type
== BT_DERIVED
&& c
->attr
.pointer
7222 && sym
== c
->ts
.u
.derived
)
7225 if (c
->ts
.type
== BT_DERIVED
&& derived_inaccessible (c
->ts
.u
.derived
))
7233 /* Resolve the argument of a deallocate expression. The expression must be
7234 a pointer or a full array. */
7237 resolve_deallocate_expr (gfc_expr
*e
)
7239 symbol_attribute attr
;
7240 int allocatable
, pointer
;
7246 if (!gfc_resolve_expr (e
))
7249 if (e
->expr_type
!= EXPR_VARIABLE
)
7252 sym
= e
->symtree
->n
.sym
;
7253 unlimited
= UNLIMITED_POLY(sym
);
7255 if (sym
->ts
.type
== BT_CLASS
)
7257 allocatable
= CLASS_DATA (sym
)->attr
.allocatable
;
7258 pointer
= CLASS_DATA (sym
)->attr
.class_pointer
;
7262 allocatable
= sym
->attr
.allocatable
;
7263 pointer
= sym
->attr
.pointer
;
7265 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
7270 if (ref
->u
.ar
.type
!= AR_FULL
7271 && !(ref
->u
.ar
.type
== AR_ELEMENT
&& ref
->u
.ar
.as
->rank
== 0
7272 && ref
->u
.ar
.codimen
&& gfc_ref_this_image (ref
)))
7277 c
= ref
->u
.c
.component
;
7278 if (c
->ts
.type
== BT_CLASS
)
7280 allocatable
= CLASS_DATA (c
)->attr
.allocatable
;
7281 pointer
= CLASS_DATA (c
)->attr
.class_pointer
;
7285 allocatable
= c
->attr
.allocatable
;
7286 pointer
= c
->attr
.pointer
;
7297 attr
= gfc_expr_attr (e
);
7299 if (allocatable
== 0 && attr
.pointer
== 0 && !unlimited
)
7302 gfc_error ("Allocate-object at %L must be ALLOCATABLE or a POINTER",
7308 if (gfc_is_coindexed (e
))
7310 gfc_error ("Coindexed allocatable object at %L", &e
->where
);
7315 && !gfc_check_vardef_context (e
, true, true, false,
7316 _("DEALLOCATE object")))
7318 if (!gfc_check_vardef_context (e
, false, true, false,
7319 _("DEALLOCATE object")))
7326 /* Returns true if the expression e contains a reference to the symbol sym. */
7328 sym_in_expr (gfc_expr
*e
, gfc_symbol
*sym
, int *f ATTRIBUTE_UNUSED
)
7330 if (e
->expr_type
== EXPR_VARIABLE
&& e
->symtree
->n
.sym
== sym
)
7337 gfc_find_sym_in_expr (gfc_symbol
*sym
, gfc_expr
*e
)
7339 return gfc_traverse_expr (e
, sym
, sym_in_expr
, 0);
7343 /* Given the expression node e for an allocatable/pointer of derived type to be
7344 allocated, get the expression node to be initialized afterwards (needed for
7345 derived types with default initializers, and derived types with allocatable
7346 components that need nullification.) */
7349 gfc_expr_to_initialize (gfc_expr
*e
)
7355 result
= gfc_copy_expr (e
);
7357 /* Change the last array reference from AR_ELEMENT to AR_FULL. */
7358 for (ref
= result
->ref
; ref
; ref
= ref
->next
)
7359 if (ref
->type
== REF_ARRAY
&& ref
->next
== NULL
)
7361 ref
->u
.ar
.type
= AR_FULL
;
7363 for (i
= 0; i
< ref
->u
.ar
.dimen
; i
++)
7364 ref
->u
.ar
.start
[i
] = ref
->u
.ar
.end
[i
] = ref
->u
.ar
.stride
[i
] = NULL
;
7369 gfc_free_shape (&result
->shape
, result
->rank
);
7371 /* Recalculate rank, shape, etc. */
7372 gfc_resolve_expr (result
);
7377 /* If the last ref of an expression is an array ref, return a copy of the
7378 expression with that one removed. Otherwise, a copy of the original
7379 expression. This is used for allocate-expressions and pointer assignment
7380 LHS, where there may be an array specification that needs to be stripped
7381 off when using gfc_check_vardef_context. */
7384 remove_last_array_ref (gfc_expr
* e
)
7389 e2
= gfc_copy_expr (e
);
7390 for (r
= &e2
->ref
; *r
; r
= &(*r
)->next
)
7391 if ((*r
)->type
== REF_ARRAY
&& !(*r
)->next
)
7393 gfc_free_ref_list (*r
);
7402 /* Used in resolve_allocate_expr to check that a allocation-object and
7403 a source-expr are conformable. This does not catch all possible
7404 cases; in particular a runtime checking is needed. */
7407 conformable_arrays (gfc_expr
*e1
, gfc_expr
*e2
)
7410 for (tail
= e2
->ref
; tail
&& tail
->next
; tail
= tail
->next
);
7412 /* First compare rank. */
7413 if ((tail
&& e1
->rank
!= tail
->u
.ar
.as
->rank
)
7414 || (!tail
&& e1
->rank
!= e2
->rank
))
7416 gfc_error ("Source-expr at %L must be scalar or have the "
7417 "same rank as the allocate-object at %L",
7418 &e1
->where
, &e2
->where
);
7429 for (i
= 0; i
< e1
->rank
; i
++)
7431 if (tail
->u
.ar
.start
[i
] == NULL
)
7434 if (tail
->u
.ar
.end
[i
])
7436 mpz_set (s
, tail
->u
.ar
.end
[i
]->value
.integer
);
7437 mpz_sub (s
, s
, tail
->u
.ar
.start
[i
]->value
.integer
);
7438 mpz_add_ui (s
, s
, 1);
7442 mpz_set (s
, tail
->u
.ar
.start
[i
]->value
.integer
);
7445 if (mpz_cmp (e1
->shape
[i
], s
) != 0)
7447 gfc_error ("Source-expr at %L and allocate-object at %L must "
7448 "have the same shape", &e1
->where
, &e2
->where
);
7461 /* Resolve the expression in an ALLOCATE statement, doing the additional
7462 checks to see whether the expression is OK or not. The expression must
7463 have a trailing array reference that gives the size of the array. */
7466 resolve_allocate_expr (gfc_expr
*e
, gfc_code
*code
, bool *array_alloc_wo_spec
)
7468 int i
, pointer
, allocatable
, dimension
, is_abstract
;
7472 symbol_attribute attr
;
7473 gfc_ref
*ref
, *ref2
;
7476 gfc_symbol
*sym
= NULL
;
7481 /* Mark the utmost array component as being in allocate to allow DIMEN_STAR
7482 checking of coarrays. */
7483 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
7484 if (ref
->next
== NULL
)
7487 if (ref
&& ref
->type
== REF_ARRAY
)
7488 ref
->u
.ar
.in_allocate
= true;
7490 if (!gfc_resolve_expr (e
))
7493 /* Make sure the expression is allocatable or a pointer. If it is
7494 pointer, the next-to-last reference must be a pointer. */
7498 sym
= e
->symtree
->n
.sym
;
7500 /* Check whether ultimate component is abstract and CLASS. */
7503 /* Is the allocate-object unlimited polymorphic? */
7504 unlimited
= UNLIMITED_POLY(e
);
7506 if (e
->expr_type
!= EXPR_VARIABLE
)
7509 attr
= gfc_expr_attr (e
);
7510 pointer
= attr
.pointer
;
7511 dimension
= attr
.dimension
;
7512 codimension
= attr
.codimension
;
7516 if (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
))
7518 allocatable
= CLASS_DATA (sym
)->attr
.allocatable
;
7519 pointer
= CLASS_DATA (sym
)->attr
.class_pointer
;
7520 dimension
= CLASS_DATA (sym
)->attr
.dimension
;
7521 codimension
= CLASS_DATA (sym
)->attr
.codimension
;
7522 is_abstract
= CLASS_DATA (sym
)->attr
.abstract
;
7526 allocatable
= sym
->attr
.allocatable
;
7527 pointer
= sym
->attr
.pointer
;
7528 dimension
= sym
->attr
.dimension
;
7529 codimension
= sym
->attr
.codimension
;
7534 for (ref
= e
->ref
; ref
; ref2
= ref
, ref
= ref
->next
)
7539 if (ref
->u
.ar
.codimen
> 0)
7542 for (n
= ref
->u
.ar
.dimen
;
7543 n
< ref
->u
.ar
.dimen
+ ref
->u
.ar
.codimen
; n
++)
7544 if (ref
->u
.ar
.dimen_type
[n
] != DIMEN_THIS_IMAGE
)
7551 if (ref
->next
!= NULL
)
7559 gfc_error ("Coindexed allocatable object at %L",
7564 c
= ref
->u
.c
.component
;
7565 if (c
->ts
.type
== BT_CLASS
)
7567 allocatable
= CLASS_DATA (c
)->attr
.allocatable
;
7568 pointer
= CLASS_DATA (c
)->attr
.class_pointer
;
7569 dimension
= CLASS_DATA (c
)->attr
.dimension
;
7570 codimension
= CLASS_DATA (c
)->attr
.codimension
;
7571 is_abstract
= CLASS_DATA (c
)->attr
.abstract
;
7575 allocatable
= c
->attr
.allocatable
;
7576 pointer
= c
->attr
.pointer
;
7577 dimension
= c
->attr
.dimension
;
7578 codimension
= c
->attr
.codimension
;
7579 is_abstract
= c
->attr
.abstract
;
7592 /* Check for F08:C628. */
7593 if (allocatable
== 0 && pointer
== 0 && !unlimited
)
7595 gfc_error ("Allocate-object at %L must be ALLOCATABLE or a POINTER",
7600 /* Some checks for the SOURCE tag. */
7603 /* Check F03:C631. */
7604 if (!gfc_type_compatible (&e
->ts
, &code
->expr3
->ts
))
7606 gfc_error ("Type of entity at %L is type incompatible with "
7607 "source-expr at %L", &e
->where
, &code
->expr3
->where
);
7611 /* Check F03:C632 and restriction following Note 6.18. */
7612 if (code
->expr3
->rank
> 0 && !conformable_arrays (code
->expr3
, e
))
7615 /* Check F03:C633. */
7616 if (code
->expr3
->ts
.kind
!= e
->ts
.kind
&& !unlimited
)
7618 gfc_error ("The allocate-object at %L and the source-expr at %L "
7619 "shall have the same kind type parameter",
7620 &e
->where
, &code
->expr3
->where
);
7624 /* Check F2008, C642. */
7625 if (code
->expr3
->ts
.type
== BT_DERIVED
7626 && ((codimension
&& gfc_expr_attr (code
->expr3
).lock_comp
)
7627 || (code
->expr3
->ts
.u
.derived
->from_intmod
7628 == INTMOD_ISO_FORTRAN_ENV
7629 && code
->expr3
->ts
.u
.derived
->intmod_sym_id
7630 == ISOFORTRAN_LOCK_TYPE
)))
7632 gfc_error ("The source-expr at %L shall neither be of type "
7633 "LOCK_TYPE nor have a LOCK_TYPE component if "
7634 "allocate-object at %L is a coarray",
7635 &code
->expr3
->where
, &e
->where
);
7639 /* Check TS18508, C702/C703. */
7640 if (code
->expr3
->ts
.type
== BT_DERIVED
7641 && ((codimension
&& gfc_expr_attr (code
->expr3
).event_comp
)
7642 || (code
->expr3
->ts
.u
.derived
->from_intmod
7643 == INTMOD_ISO_FORTRAN_ENV
7644 && code
->expr3
->ts
.u
.derived
->intmod_sym_id
7645 == ISOFORTRAN_EVENT_TYPE
)))
7647 gfc_error ("The source-expr at %L shall neither be of type "
7648 "EVENT_TYPE nor have a EVENT_TYPE component if "
7649 "allocate-object at %L is a coarray",
7650 &code
->expr3
->where
, &e
->where
);
7655 /* Check F08:C629. */
7656 if (is_abstract
&& code
->ext
.alloc
.ts
.type
== BT_UNKNOWN
7659 gcc_assert (e
->ts
.type
== BT_CLASS
);
7660 gfc_error ("Allocating %s of ABSTRACT base type at %L requires a "
7661 "type-spec or source-expr", sym
->name
, &e
->where
);
7665 /* Check F08:C632. */
7666 if (code
->ext
.alloc
.ts
.type
== BT_CHARACTER
&& !e
->ts
.deferred
7667 && !UNLIMITED_POLY (e
))
7671 if (!e
->ts
.u
.cl
->length
)
7674 cmp
= gfc_dep_compare_expr (e
->ts
.u
.cl
->length
,
7675 code
->ext
.alloc
.ts
.u
.cl
->length
);
7676 if (cmp
== 1 || cmp
== -1 || cmp
== -3)
7678 gfc_error ("Allocating %s at %L with type-spec requires the same "
7679 "character-length parameter as in the declaration",
7680 sym
->name
, &e
->where
);
7685 /* In the variable definition context checks, gfc_expr_attr is used
7686 on the expression. This is fooled by the array specification
7687 present in e, thus we have to eliminate that one temporarily. */
7688 e2
= remove_last_array_ref (e
);
7691 t
= gfc_check_vardef_context (e2
, true, true, false,
7692 _("ALLOCATE object"));
7694 t
= gfc_check_vardef_context (e2
, false, true, false,
7695 _("ALLOCATE object"));
7700 if (e
->ts
.type
== BT_CLASS
&& CLASS_DATA (e
)->attr
.dimension
7701 && !code
->expr3
&& code
->ext
.alloc
.ts
.type
== BT_DERIVED
)
7703 /* For class arrays, the initialization with SOURCE is done
7704 using _copy and trans_call. It is convenient to exploit that
7705 when the allocated type is different from the declared type but
7706 no SOURCE exists by setting expr3. */
7707 code
->expr3
= gfc_default_initializer (&code
->ext
.alloc
.ts
);
7709 else if (flag_coarray
!= GFC_FCOARRAY_LIB
&& e
->ts
.type
== BT_DERIVED
7710 && e
->ts
.u
.derived
->from_intmod
== INTMOD_ISO_FORTRAN_ENV
7711 && e
->ts
.u
.derived
->intmod_sym_id
== ISOFORTRAN_EVENT_TYPE
)
7713 /* We have to zero initialize the integer variable. */
7714 code
->expr3
= gfc_get_int_expr (gfc_default_integer_kind
, &e
->where
, 0);
7717 if (e
->ts
.type
== BT_CLASS
&& !unlimited
&& !UNLIMITED_POLY (code
->expr3
))
7719 /* Make sure the vtab symbol is present when
7720 the module variables are generated. */
7721 gfc_typespec ts
= e
->ts
;
7723 ts
= code
->expr3
->ts
;
7724 else if (code
->ext
.alloc
.ts
.type
== BT_DERIVED
)
7725 ts
= code
->ext
.alloc
.ts
;
7727 /* Finding the vtab also publishes the type's symbol. Therefore this
7728 statement is necessary. */
7729 gfc_find_derived_vtab (ts
.u
.derived
);
7731 else if (unlimited
&& !UNLIMITED_POLY (code
->expr3
))
7733 /* Again, make sure the vtab symbol is present when
7734 the module variables are generated. */
7735 gfc_typespec
*ts
= NULL
;
7737 ts
= &code
->expr3
->ts
;
7739 ts
= &code
->ext
.alloc
.ts
;
7743 /* Finding the vtab also publishes the type's symbol. Therefore this
7744 statement is necessary. */
7748 if (dimension
== 0 && codimension
== 0)
7751 /* Make sure the last reference node is an array specification. */
7753 if (!ref2
|| ref2
->type
!= REF_ARRAY
|| ref2
->u
.ar
.type
== AR_FULL
7754 || (dimension
&& ref2
->u
.ar
.dimen
== 0))
7759 if (!gfc_notify_std (GFC_STD_F2008
, "Array specification required "
7760 "in ALLOCATE statement at %L", &e
->where
))
7762 if (code
->expr3
->rank
!= 0)
7763 *array_alloc_wo_spec
= true;
7766 gfc_error ("Array specification or array-valued SOURCE= "
7767 "expression required in ALLOCATE statement at %L",
7774 gfc_error ("Array specification required in ALLOCATE statement "
7775 "at %L", &e
->where
);
7780 /* Make sure that the array section reference makes sense in the
7781 context of an ALLOCATE specification. */
7786 for (i
= ar
->dimen
; i
< ar
->dimen
+ ar
->codimen
; i
++)
7788 switch (ar
->dimen_type
[i
])
7790 case DIMEN_THIS_IMAGE
:
7791 gfc_error ("Coarray specification required in ALLOCATE statement "
7792 "at %L", &e
->where
);
7796 if (ar
->start
[i
] == 0 || ar
->end
[i
] == 0)
7798 /* If ar->stride[i] is NULL, we issued a previous error. */
7799 if (ar
->stride
[i
] == NULL
)
7800 gfc_error ("Bad array specification in ALLOCATE statement "
7801 "at %L", &e
->where
);
7804 else if (gfc_dep_compare_expr (ar
->start
[i
], ar
->end
[i
]) == 1)
7806 gfc_error ("Upper cobound is less than lower cobound at %L",
7807 &ar
->start
[i
]->where
);
7813 if (ar
->start
[i
]->expr_type
== EXPR_CONSTANT
)
7815 gcc_assert (ar
->start
[i
]->ts
.type
== BT_INTEGER
);
7816 if (mpz_cmp_si (ar
->start
[i
]->value
.integer
, 1) < 0)
7818 gfc_error ("Upper cobound is less than lower cobound "
7819 "of 1 at %L", &ar
->start
[i
]->where
);
7829 gfc_error ("Bad array specification in ALLOCATE statement at %L",
7835 for (i
= 0; i
< ar
->dimen
; i
++)
7837 if (ar
->type
== AR_ELEMENT
|| ar
->type
== AR_FULL
)
7840 switch (ar
->dimen_type
[i
])
7846 if (ar
->start
[i
] != NULL
7847 && ar
->end
[i
] != NULL
7848 && ar
->stride
[i
] == NULL
)
7856 case DIMEN_THIS_IMAGE
:
7857 gfc_error ("Bad array specification in ALLOCATE statement at %L",
7863 for (a
= code
->ext
.alloc
.list
; a
; a
= a
->next
)
7865 sym
= a
->expr
->symtree
->n
.sym
;
7867 /* TODO - check derived type components. */
7868 if (gfc_bt_struct (sym
->ts
.type
) || sym
->ts
.type
== BT_CLASS
)
7871 if ((ar
->start
[i
] != NULL
7872 && gfc_find_sym_in_expr (sym
, ar
->start
[i
]))
7873 || (ar
->end
[i
] != NULL
7874 && gfc_find_sym_in_expr (sym
, ar
->end
[i
])))
7876 gfc_error ("%qs must not appear in the array specification at "
7877 "%L in the same ALLOCATE statement where it is "
7878 "itself allocated", sym
->name
, &ar
->where
);
7884 for (i
= ar
->dimen
; i
< ar
->codimen
+ ar
->dimen
; i
++)
7886 if (ar
->dimen_type
[i
] == DIMEN_ELEMENT
7887 || ar
->dimen_type
[i
] == DIMEN_RANGE
)
7889 if (i
== (ar
->dimen
+ ar
->codimen
- 1))
7891 gfc_error ("Expected '*' in coindex specification in ALLOCATE "
7892 "statement at %L", &e
->where
);
7898 if (ar
->dimen_type
[i
] == DIMEN_STAR
&& i
== (ar
->dimen
+ ar
->codimen
- 1)
7899 && ar
->stride
[i
] == NULL
)
7902 gfc_error ("Bad coarray specification in ALLOCATE statement at %L",
7916 resolve_allocate_deallocate (gfc_code
*code
, const char *fcn
)
7918 gfc_expr
*stat
, *errmsg
, *pe
, *qe
;
7919 gfc_alloc
*a
, *p
, *q
;
7922 errmsg
= code
->expr2
;
7924 /* Check the stat variable. */
7927 gfc_check_vardef_context (stat
, false, false, false,
7928 _("STAT variable"));
7930 if ((stat
->ts
.type
!= BT_INTEGER
7931 && !(stat
->ref
&& (stat
->ref
->type
== REF_ARRAY
7932 || stat
->ref
->type
== REF_COMPONENT
)))
7934 gfc_error ("Stat-variable at %L must be a scalar INTEGER "
7935 "variable", &stat
->where
);
7937 for (p
= code
->ext
.alloc
.list
; p
; p
= p
->next
)
7938 if (p
->expr
->symtree
->n
.sym
->name
== stat
->symtree
->n
.sym
->name
)
7940 gfc_ref
*ref1
, *ref2
;
7943 for (ref1
= p
->expr
->ref
, ref2
= stat
->ref
; ref1
&& ref2
;
7944 ref1
= ref1
->next
, ref2
= ref2
->next
)
7946 if (ref1
->type
!= REF_COMPONENT
|| ref2
->type
!= REF_COMPONENT
)
7948 if (ref1
->u
.c
.component
->name
!= ref2
->u
.c
.component
->name
)
7957 gfc_error ("Stat-variable at %L shall not be %sd within "
7958 "the same %s statement", &stat
->where
, fcn
, fcn
);
7964 /* Check the errmsg variable. */
7968 gfc_warning (0, "ERRMSG at %L is useless without a STAT tag",
7971 gfc_check_vardef_context (errmsg
, false, false, false,
7972 _("ERRMSG variable"));
7974 /* F18:R928 alloc-opt is ERRMSG = errmsg-variable
7975 F18:R930 errmsg-variable is scalar-default-char-variable
7976 F18:R906 default-char-variable is variable
7977 F18:C906 default-char-variable shall be default character. */
7978 if ((errmsg
->ts
.type
!= BT_CHARACTER
7980 && (errmsg
->ref
->type
== REF_ARRAY
7981 || errmsg
->ref
->type
== REF_COMPONENT
)))
7983 || errmsg
->ts
.kind
!= gfc_default_character_kind
)
7984 gfc_error ("ERRMSG variable at %L shall be a scalar default CHARACTER "
7985 "variable", &errmsg
->where
);
7987 for (p
= code
->ext
.alloc
.list
; p
; p
= p
->next
)
7988 if (p
->expr
->symtree
->n
.sym
->name
== errmsg
->symtree
->n
.sym
->name
)
7990 gfc_ref
*ref1
, *ref2
;
7993 for (ref1
= p
->expr
->ref
, ref2
= errmsg
->ref
; ref1
&& ref2
;
7994 ref1
= ref1
->next
, ref2
= ref2
->next
)
7996 if (ref1
->type
!= REF_COMPONENT
|| ref2
->type
!= REF_COMPONENT
)
7998 if (ref1
->u
.c
.component
->name
!= ref2
->u
.c
.component
->name
)
8007 gfc_error ("Errmsg-variable at %L shall not be %sd within "
8008 "the same %s statement", &errmsg
->where
, fcn
, fcn
);
8014 /* Check that an allocate-object appears only once in the statement. */
8016 for (p
= code
->ext
.alloc
.list
; p
; p
= p
->next
)
8019 for (q
= p
->next
; q
; q
= q
->next
)
8022 if (pe
->symtree
->n
.sym
->name
== qe
->symtree
->n
.sym
->name
)
8024 /* This is a potential collision. */
8025 gfc_ref
*pr
= pe
->ref
;
8026 gfc_ref
*qr
= qe
->ref
;
8028 /* Follow the references until
8029 a) They start to differ, in which case there is no error;
8030 you can deallocate a%b and a%c in a single statement
8031 b) Both of them stop, which is an error
8032 c) One of them stops, which is also an error. */
8035 if (pr
== NULL
&& qr
== NULL
)
8037 gfc_error ("Allocate-object at %L also appears at %L",
8038 &pe
->where
, &qe
->where
);
8041 else if (pr
!= NULL
&& qr
== NULL
)
8043 gfc_error ("Allocate-object at %L is subobject of"
8044 " object at %L", &pe
->where
, &qe
->where
);
8047 else if (pr
== NULL
&& qr
!= NULL
)
8049 gfc_error ("Allocate-object at %L is subobject of"
8050 " object at %L", &qe
->where
, &pe
->where
);
8053 /* Here, pr != NULL && qr != NULL */
8054 gcc_assert(pr
->type
== qr
->type
);
8055 if (pr
->type
== REF_ARRAY
)
8057 /* Handle cases like allocate(v(3)%x(3), v(2)%x(3)),
8059 gcc_assert (qr
->type
== REF_ARRAY
);
8061 if (pr
->next
&& qr
->next
)
8064 gfc_array_ref
*par
= &(pr
->u
.ar
);
8065 gfc_array_ref
*qar
= &(qr
->u
.ar
);
8067 for (i
=0; i
<par
->dimen
; i
++)
8069 if ((par
->start
[i
] != NULL
8070 || qar
->start
[i
] != NULL
)
8071 && gfc_dep_compare_expr (par
->start
[i
],
8072 qar
->start
[i
]) != 0)
8079 if (pr
->u
.c
.component
->name
!= qr
->u
.c
.component
->name
)
8092 if (strcmp (fcn
, "ALLOCATE") == 0)
8094 bool arr_alloc_wo_spec
= false;
8096 /* Resolving the expr3 in the loop over all objects to allocate would
8097 execute loop invariant code for each loop item. Therefore do it just
8099 if (code
->expr3
&& code
->expr3
->mold
8100 && code
->expr3
->ts
.type
== BT_DERIVED
)
8102 /* Default initialization via MOLD (non-polymorphic). */
8103 gfc_expr
*rhs
= gfc_default_initializer (&code
->expr3
->ts
);
8106 gfc_resolve_expr (rhs
);
8107 gfc_free_expr (code
->expr3
);
8111 for (a
= code
->ext
.alloc
.list
; a
; a
= a
->next
)
8112 resolve_allocate_expr (a
->expr
, code
, &arr_alloc_wo_spec
);
8114 if (arr_alloc_wo_spec
&& code
->expr3
)
8116 /* Mark the allocate to have to take the array specification
8118 code
->ext
.alloc
.arr_spec_from_expr3
= 1;
8123 for (a
= code
->ext
.alloc
.list
; a
; a
= a
->next
)
8124 resolve_deallocate_expr (a
->expr
);
8129 /************ SELECT CASE resolution subroutines ************/
8131 /* Callback function for our mergesort variant. Determines interval
8132 overlaps for CASEs. Return <0 if op1 < op2, 0 for overlap, >0 for
8133 op1 > op2. Assumes we're not dealing with the default case.
8134 We have op1 = (:L), (K:L) or (K:) and op2 = (:N), (M:N) or (M:).
8135 There are nine situations to check. */
8138 compare_cases (const gfc_case
*op1
, const gfc_case
*op2
)
8142 if (op1
->low
== NULL
) /* op1 = (:L) */
8144 /* op2 = (:N), so overlap. */
8146 /* op2 = (M:) or (M:N), L < M */
8147 if (op2
->low
!= NULL
8148 && gfc_compare_expr (op1
->high
, op2
->low
, INTRINSIC_LT
) < 0)
8151 else if (op1
->high
== NULL
) /* op1 = (K:) */
8153 /* op2 = (M:), so overlap. */
8155 /* op2 = (:N) or (M:N), K > N */
8156 if (op2
->high
!= NULL
8157 && gfc_compare_expr (op1
->low
, op2
->high
, INTRINSIC_GT
) > 0)
8160 else /* op1 = (K:L) */
8162 if (op2
->low
== NULL
) /* op2 = (:N), K > N */
8163 retval
= (gfc_compare_expr (op1
->low
, op2
->high
, INTRINSIC_GT
) > 0)
8165 else if (op2
->high
== NULL
) /* op2 = (M:), L < M */
8166 retval
= (gfc_compare_expr (op1
->high
, op2
->low
, INTRINSIC_LT
) < 0)
8168 else /* op2 = (M:N) */
8172 if (gfc_compare_expr (op1
->high
, op2
->low
, INTRINSIC_LT
) < 0)
8175 else if (gfc_compare_expr (op1
->low
, op2
->high
, INTRINSIC_GT
) > 0)
8184 /* Merge-sort a double linked case list, detecting overlap in the
8185 process. LIST is the head of the double linked case list before it
8186 is sorted. Returns the head of the sorted list if we don't see any
8187 overlap, or NULL otherwise. */
8190 check_case_overlap (gfc_case
*list
)
8192 gfc_case
*p
, *q
, *e
, *tail
;
8193 int insize
, nmerges
, psize
, qsize
, cmp
, overlap_seen
;
8195 /* If the passed list was empty, return immediately. */
8202 /* Loop unconditionally. The only exit from this loop is a return
8203 statement, when we've finished sorting the case list. */
8210 /* Count the number of merges we do in this pass. */
8213 /* Loop while there exists a merge to be done. */
8218 /* Count this merge. */
8221 /* Cut the list in two pieces by stepping INSIZE places
8222 forward in the list, starting from P. */
8225 for (i
= 0; i
< insize
; i
++)
8234 /* Now we have two lists. Merge them! */
8235 while (psize
> 0 || (qsize
> 0 && q
!= NULL
))
8237 /* See from which the next case to merge comes from. */
8240 /* P is empty so the next case must come from Q. */
8245 else if (qsize
== 0 || q
== NULL
)
8254 cmp
= compare_cases (p
, q
);
8257 /* The whole case range for P is less than the
8265 /* The whole case range for Q is greater than
8266 the case range for P. */
8273 /* The cases overlap, or they are the same
8274 element in the list. Either way, we must
8275 issue an error and get the next case from P. */
8276 /* FIXME: Sort P and Q by line number. */
8277 gfc_error ("CASE label at %L overlaps with CASE "
8278 "label at %L", &p
->where
, &q
->where
);
8286 /* Add the next element to the merged list. */
8295 /* P has now stepped INSIZE places along, and so has Q. So
8296 they're the same. */
8301 /* If we have done only one merge or none at all, we've
8302 finished sorting the cases. */
8311 /* Otherwise repeat, merging lists twice the size. */
8317 /* Check to see if an expression is suitable for use in a CASE statement.
8318 Makes sure that all case expressions are scalar constants of the same
8319 type. Return false if anything is wrong. */
8322 validate_case_label_expr (gfc_expr
*e
, gfc_expr
*case_expr
)
8324 if (e
== NULL
) return true;
8326 if (e
->ts
.type
!= case_expr
->ts
.type
)
8328 gfc_error ("Expression in CASE statement at %L must be of type %s",
8329 &e
->where
, gfc_basic_typename (case_expr
->ts
.type
));
8333 /* C805 (R808) For a given case-construct, each case-value shall be of
8334 the same type as case-expr. For character type, length differences
8335 are allowed, but the kind type parameters shall be the same. */
8337 if (case_expr
->ts
.type
== BT_CHARACTER
&& e
->ts
.kind
!= case_expr
->ts
.kind
)
8339 gfc_error ("Expression in CASE statement at %L must be of kind %d",
8340 &e
->where
, case_expr
->ts
.kind
);
8344 /* Convert the case value kind to that of case expression kind,
8347 if (e
->ts
.kind
!= case_expr
->ts
.kind
)
8348 gfc_convert_type_warn (e
, &case_expr
->ts
, 2, 0);
8352 gfc_error ("Expression in CASE statement at %L must be scalar",
8361 /* Given a completely parsed select statement, we:
8363 - Validate all expressions and code within the SELECT.
8364 - Make sure that the selection expression is not of the wrong type.
8365 - Make sure that no case ranges overlap.
8366 - Eliminate unreachable cases and unreachable code resulting from
8367 removing case labels.
8369 The standard does allow unreachable cases, e.g. CASE (5:3). But
8370 they are a hassle for code generation, and to prevent that, we just
8371 cut them out here. This is not necessary for overlapping cases
8372 because they are illegal and we never even try to generate code.
8374 We have the additional caveat that a SELECT construct could have
8375 been a computed GOTO in the source code. Fortunately we can fairly
8376 easily work around that here: The case_expr for a "real" SELECT CASE
8377 is in code->expr1, but for a computed GOTO it is in code->expr2. All
8378 we have to do is make sure that the case_expr is a scalar integer
8382 resolve_select (gfc_code
*code
, bool select_type
)
8385 gfc_expr
*case_expr
;
8386 gfc_case
*cp
, *default_case
, *tail
, *head
;
8387 int seen_unreachable
;
8393 if (code
->expr1
== NULL
)
8395 /* This was actually a computed GOTO statement. */
8396 case_expr
= code
->expr2
;
8397 if (case_expr
->ts
.type
!= BT_INTEGER
|| case_expr
->rank
!= 0)
8398 gfc_error ("Selection expression in computed GOTO statement "
8399 "at %L must be a scalar integer expression",
8402 /* Further checking is not necessary because this SELECT was built
8403 by the compiler, so it should always be OK. Just move the
8404 case_expr from expr2 to expr so that we can handle computed
8405 GOTOs as normal SELECTs from here on. */
8406 code
->expr1
= code
->expr2
;
8411 case_expr
= code
->expr1
;
8412 type
= case_expr
->ts
.type
;
8415 if (type
!= BT_LOGICAL
&& type
!= BT_INTEGER
&& type
!= BT_CHARACTER
)
8417 gfc_error ("Argument of SELECT statement at %L cannot be %s",
8418 &case_expr
->where
, gfc_typename (&case_expr
->ts
));
8420 /* Punt. Going on here just produce more garbage error messages. */
8425 if (!select_type
&& case_expr
->rank
!= 0)
8427 gfc_error ("Argument of SELECT statement at %L must be a scalar "
8428 "expression", &case_expr
->where
);
8434 /* Raise a warning if an INTEGER case value exceeds the range of
8435 the case-expr. Later, all expressions will be promoted to the
8436 largest kind of all case-labels. */
8438 if (type
== BT_INTEGER
)
8439 for (body
= code
->block
; body
; body
= body
->block
)
8440 for (cp
= body
->ext
.block
.case_list
; cp
; cp
= cp
->next
)
8443 && gfc_check_integer_range (cp
->low
->value
.integer
,
8444 case_expr
->ts
.kind
) != ARITH_OK
)
8445 gfc_warning (0, "Expression in CASE statement at %L is "
8446 "not in the range of %s", &cp
->low
->where
,
8447 gfc_typename (&case_expr
->ts
));
8450 && cp
->low
!= cp
->high
8451 && gfc_check_integer_range (cp
->high
->value
.integer
,
8452 case_expr
->ts
.kind
) != ARITH_OK
)
8453 gfc_warning (0, "Expression in CASE statement at %L is "
8454 "not in the range of %s", &cp
->high
->where
,
8455 gfc_typename (&case_expr
->ts
));
8458 /* PR 19168 has a long discussion concerning a mismatch of the kinds
8459 of the SELECT CASE expression and its CASE values. Walk the lists
8460 of case values, and if we find a mismatch, promote case_expr to
8461 the appropriate kind. */
8463 if (type
== BT_LOGICAL
|| type
== BT_INTEGER
)
8465 for (body
= code
->block
; body
; body
= body
->block
)
8467 /* Walk the case label list. */
8468 for (cp
= body
->ext
.block
.case_list
; cp
; cp
= cp
->next
)
8470 /* Intercept the DEFAULT case. It does not have a kind. */
8471 if (cp
->low
== NULL
&& cp
->high
== NULL
)
8474 /* Unreachable case ranges are discarded, so ignore. */
8475 if (cp
->low
!= NULL
&& cp
->high
!= NULL
8476 && cp
->low
!= cp
->high
8477 && gfc_compare_expr (cp
->low
, cp
->high
, INTRINSIC_GT
) > 0)
8481 && case_expr
->ts
.kind
!= gfc_kind_max(case_expr
, cp
->low
))
8482 gfc_convert_type_warn (case_expr
, &cp
->low
->ts
, 2, 0);
8484 if (cp
->high
!= NULL
8485 && case_expr
->ts
.kind
!= gfc_kind_max(case_expr
, cp
->high
))
8486 gfc_convert_type_warn (case_expr
, &cp
->high
->ts
, 2, 0);
8491 /* Assume there is no DEFAULT case. */
8492 default_case
= NULL
;
8497 for (body
= code
->block
; body
; body
= body
->block
)
8499 /* Assume the CASE list is OK, and all CASE labels can be matched. */
8501 seen_unreachable
= 0;
8503 /* Walk the case label list, making sure that all case labels
8505 for (cp
= body
->ext
.block
.case_list
; cp
; cp
= cp
->next
)
8507 /* Count the number of cases in the whole construct. */
8510 /* Intercept the DEFAULT case. */
8511 if (cp
->low
== NULL
&& cp
->high
== NULL
)
8513 if (default_case
!= NULL
)
8515 gfc_error ("The DEFAULT CASE at %L cannot be followed "
8516 "by a second DEFAULT CASE at %L",
8517 &default_case
->where
, &cp
->where
);
8528 /* Deal with single value cases and case ranges. Errors are
8529 issued from the validation function. */
8530 if (!validate_case_label_expr (cp
->low
, case_expr
)
8531 || !validate_case_label_expr (cp
->high
, case_expr
))
8537 if (type
== BT_LOGICAL
8538 && ((cp
->low
== NULL
|| cp
->high
== NULL
)
8539 || cp
->low
!= cp
->high
))
8541 gfc_error ("Logical range in CASE statement at %L is not "
8542 "allowed", &cp
->low
->where
);
8547 if (type
== BT_LOGICAL
&& cp
->low
->expr_type
== EXPR_CONSTANT
)
8550 value
= cp
->low
->value
.logical
== 0 ? 2 : 1;
8551 if (value
& seen_logical
)
8553 gfc_error ("Constant logical value in CASE statement "
8554 "is repeated at %L",
8559 seen_logical
|= value
;
8562 if (cp
->low
!= NULL
&& cp
->high
!= NULL
8563 && cp
->low
!= cp
->high
8564 && gfc_compare_expr (cp
->low
, cp
->high
, INTRINSIC_GT
) > 0)
8566 if (warn_surprising
)
8567 gfc_warning (OPT_Wsurprising
,
8568 "Range specification at %L can never be matched",
8571 cp
->unreachable
= 1;
8572 seen_unreachable
= 1;
8576 /* If the case range can be matched, it can also overlap with
8577 other cases. To make sure it does not, we put it in a
8578 double linked list here. We sort that with a merge sort
8579 later on to detect any overlapping cases. */
8583 head
->right
= head
->left
= NULL
;
8588 tail
->right
->left
= tail
;
8595 /* It there was a failure in the previous case label, give up
8596 for this case label list. Continue with the next block. */
8600 /* See if any case labels that are unreachable have been seen.
8601 If so, we eliminate them. This is a bit of a kludge because
8602 the case lists for a single case statement (label) is a
8603 single forward linked lists. */
8604 if (seen_unreachable
)
8606 /* Advance until the first case in the list is reachable. */
8607 while (body
->ext
.block
.case_list
!= NULL
8608 && body
->ext
.block
.case_list
->unreachable
)
8610 gfc_case
*n
= body
->ext
.block
.case_list
;
8611 body
->ext
.block
.case_list
= body
->ext
.block
.case_list
->next
;
8613 gfc_free_case_list (n
);
8616 /* Strip all other unreachable cases. */
8617 if (body
->ext
.block
.case_list
)
8619 for (cp
= body
->ext
.block
.case_list
; cp
&& cp
->next
; cp
= cp
->next
)
8621 if (cp
->next
->unreachable
)
8623 gfc_case
*n
= cp
->next
;
8624 cp
->next
= cp
->next
->next
;
8626 gfc_free_case_list (n
);
8633 /* See if there were overlapping cases. If the check returns NULL,
8634 there was overlap. In that case we don't do anything. If head
8635 is non-NULL, we prepend the DEFAULT case. The sorted list can
8636 then used during code generation for SELECT CASE constructs with
8637 a case expression of a CHARACTER type. */
8640 head
= check_case_overlap (head
);
8642 /* Prepend the default_case if it is there. */
8643 if (head
!= NULL
&& default_case
)
8645 default_case
->left
= NULL
;
8646 default_case
->right
= head
;
8647 head
->left
= default_case
;
8651 /* Eliminate dead blocks that may be the result if we've seen
8652 unreachable case labels for a block. */
8653 for (body
= code
; body
&& body
->block
; body
= body
->block
)
8655 if (body
->block
->ext
.block
.case_list
== NULL
)
8657 /* Cut the unreachable block from the code chain. */
8658 gfc_code
*c
= body
->block
;
8659 body
->block
= c
->block
;
8661 /* Kill the dead block, but not the blocks below it. */
8663 gfc_free_statements (c
);
8667 /* More than two cases is legal but insane for logical selects.
8668 Issue a warning for it. */
8669 if (warn_surprising
&& type
== BT_LOGICAL
&& ncases
> 2)
8670 gfc_warning (OPT_Wsurprising
,
8671 "Logical SELECT CASE block at %L has more that two cases",
8676 /* Check if a derived type is extensible. */
8679 gfc_type_is_extensible (gfc_symbol
*sym
)
8681 return !(sym
->attr
.is_bind_c
|| sym
->attr
.sequence
8682 || (sym
->attr
.is_class
8683 && sym
->components
->ts
.u
.derived
->attr
.unlimited_polymorphic
));
8688 resolve_types (gfc_namespace
*ns
);
8690 /* Resolve an associate-name: Resolve target and ensure the type-spec is
8691 correct as well as possibly the array-spec. */
8694 resolve_assoc_var (gfc_symbol
* sym
, bool resolve_target
)
8698 gcc_assert (sym
->assoc
);
8699 gcc_assert (sym
->attr
.flavor
== FL_VARIABLE
);
8701 /* If this is for SELECT TYPE, the target may not yet be set. In that
8702 case, return. Resolution will be called later manually again when
8704 target
= sym
->assoc
->target
;
8707 gcc_assert (!sym
->assoc
->dangling
);
8709 if (resolve_target
&& !gfc_resolve_expr (target
))
8712 /* For variable targets, we get some attributes from the target. */
8713 if (target
->expr_type
== EXPR_VARIABLE
)
8717 gcc_assert (target
->symtree
);
8718 tsym
= target
->symtree
->n
.sym
;
8720 sym
->attr
.asynchronous
= tsym
->attr
.asynchronous
;
8721 sym
->attr
.volatile_
= tsym
->attr
.volatile_
;
8723 sym
->attr
.target
= tsym
->attr
.target
8724 || gfc_expr_attr (target
).pointer
;
8725 if (is_subref_array (target
))
8726 sym
->attr
.subref_array_pointer
= 1;
8729 if (target
->expr_type
== EXPR_NULL
)
8731 gfc_error ("Selector at %L cannot be NULL()", &target
->where
);
8734 else if (target
->ts
.type
== BT_UNKNOWN
)
8736 gfc_error ("Selector at %L has no type", &target
->where
);
8740 /* Get type if this was not already set. Note that it can be
8741 some other type than the target in case this is a SELECT TYPE
8742 selector! So we must not update when the type is already there. */
8743 if (sym
->ts
.type
== BT_UNKNOWN
)
8744 sym
->ts
= target
->ts
;
8746 gcc_assert (sym
->ts
.type
!= BT_UNKNOWN
);
8748 /* See if this is a valid association-to-variable. */
8749 sym
->assoc
->variable
= (target
->expr_type
== EXPR_VARIABLE
8750 && !gfc_has_vector_subscript (target
));
8752 /* Finally resolve if this is an array or not. */
8753 if (sym
->attr
.dimension
&& target
->rank
== 0)
8755 /* primary.c makes the assumption that a reference to an associate
8756 name followed by a left parenthesis is an array reference. */
8757 if (sym
->ts
.type
!= BT_CHARACTER
)
8758 gfc_error ("Associate-name %qs at %L is used as array",
8759 sym
->name
, &sym
->declared_at
);
8760 sym
->attr
.dimension
= 0;
8765 /* We cannot deal with class selectors that need temporaries. */
8766 if (target
->ts
.type
== BT_CLASS
8767 && gfc_ref_needs_temporary_p (target
->ref
))
8769 gfc_error ("CLASS selector at %L needs a temporary which is not "
8770 "yet implemented", &target
->where
);
8774 if (target
->ts
.type
== BT_CLASS
)
8775 gfc_fix_class_refs (target
);
8777 if (target
->rank
!= 0)
8780 /* The rank may be incorrectly guessed at parsing, therefore make sure
8781 it is corrected now. */
8782 if (sym
->ts
.type
!= BT_CLASS
&& (!sym
->as
|| sym
->assoc
->rankguessed
))
8785 sym
->as
= gfc_get_array_spec ();
8787 as
->rank
= target
->rank
;
8788 as
->type
= AS_DEFERRED
;
8789 as
->corank
= gfc_get_corank (target
);
8790 sym
->attr
.dimension
= 1;
8791 if (as
->corank
!= 0)
8792 sym
->attr
.codimension
= 1;
8794 else if (sym
->ts
.type
== BT_CLASS
&& (!CLASS_DATA (sym
)->as
|| sym
->assoc
->rankguessed
))
8796 if (!CLASS_DATA (sym
)->as
)
8797 CLASS_DATA (sym
)->as
= gfc_get_array_spec ();
8798 as
= CLASS_DATA (sym
)->as
;
8799 as
->rank
= target
->rank
;
8800 as
->type
= AS_DEFERRED
;
8801 as
->corank
= gfc_get_corank (target
);
8802 CLASS_DATA (sym
)->attr
.dimension
= 1;
8803 if (as
->corank
!= 0)
8804 CLASS_DATA (sym
)->attr
.codimension
= 1;
8809 /* target's rank is 0, but the type of the sym is still array valued,
8810 which has to be corrected. */
8811 if (sym
->ts
.type
== BT_CLASS
8812 && CLASS_DATA (sym
) && CLASS_DATA (sym
)->as
)
8815 symbol_attribute attr
;
8816 /* The associated variable's type is still the array type
8817 correct this now. */
8818 gfc_typespec
*ts
= &target
->ts
;
8821 for (ref
= target
->ref
; ref
!= NULL
; ref
= ref
->next
)
8826 ts
= &ref
->u
.c
.component
->ts
;
8829 if (ts
->type
== BT_CLASS
)
8830 ts
= &ts
->u
.derived
->components
->ts
;
8836 /* Create a scalar instance of the current class type. Because the
8837 rank of a class array goes into its name, the type has to be
8838 rebuild. The alternative of (re-)setting just the attributes
8839 and as in the current type, destroys the type also in other
8843 sym
->ts
.type
= BT_CLASS
;
8844 attr
= CLASS_DATA (sym
)->attr
;
8846 attr
.associate_var
= 1;
8847 attr
.dimension
= attr
.codimension
= 0;
8848 attr
.class_pointer
= 1;
8849 if (!gfc_build_class_symbol (&sym
->ts
, &attr
, &as
))
8851 /* Make sure the _vptr is set. */
8852 c
= gfc_find_component (sym
->ts
.u
.derived
, "_vptr", true, true, NULL
);
8853 if (c
->ts
.u
.derived
== NULL
)
8854 c
->ts
.u
.derived
= gfc_find_derived_vtab (sym
->ts
.u
.derived
);
8855 CLASS_DATA (sym
)->attr
.pointer
= 1;
8856 CLASS_DATA (sym
)->attr
.class_pointer
= 1;
8857 gfc_set_sym_referenced (sym
->ts
.u
.derived
);
8858 gfc_commit_symbol (sym
->ts
.u
.derived
);
8859 /* _vptr now has the _vtab in it, change it to the _vtype. */
8860 if (c
->ts
.u
.derived
->attr
.vtab
)
8861 c
->ts
.u
.derived
= c
->ts
.u
.derived
->ts
.u
.derived
;
8862 c
->ts
.u
.derived
->ns
->types_resolved
= 0;
8863 resolve_types (c
->ts
.u
.derived
->ns
);
8867 /* Mark this as an associate variable. */
8868 sym
->attr
.associate_var
= 1;
8870 /* Fix up the type-spec for CHARACTER types. */
8871 if (sym
->ts
.type
== BT_CHARACTER
&& !sym
->attr
.select_type_temporary
)
8874 sym
->ts
.u
.cl
= target
->ts
.u
.cl
;
8876 if (sym
->ts
.deferred
&& target
->expr_type
== EXPR_VARIABLE
8877 && target
->symtree
->n
.sym
->attr
.dummy
8878 && sym
->ts
.u
.cl
== target
->ts
.u
.cl
)
8880 sym
->ts
.u
.cl
= gfc_new_charlen (sym
->ns
, NULL
);
8881 sym
->ts
.deferred
= 1;
8884 if (!sym
->ts
.u
.cl
->length
8885 && !sym
->ts
.deferred
8886 && target
->expr_type
== EXPR_CONSTANT
)
8888 sym
->ts
.u
.cl
->length
=
8889 gfc_get_int_expr (gfc_charlen_int_kind
, NULL
,
8890 target
->value
.character
.length
);
8892 else if ((!sym
->ts
.u
.cl
->length
8893 || sym
->ts
.u
.cl
->length
->expr_type
!= EXPR_CONSTANT
)
8894 && target
->expr_type
!= EXPR_VARIABLE
)
8896 sym
->ts
.u
.cl
= gfc_new_charlen (sym
->ns
, NULL
);
8897 sym
->ts
.deferred
= 1;
8899 /* This is reset in trans-stmt.c after the assignment
8900 of the target expression to the associate name. */
8901 sym
->attr
.allocatable
= 1;
8905 /* If the target is a good class object, so is the associate variable. */
8906 if (sym
->ts
.type
== BT_CLASS
&& gfc_expr_attr (target
).class_ok
)
8907 sym
->attr
.class_ok
= 1;
8911 /* Ensure that SELECT TYPE expressions have the correct rank and a full
8912 array reference, where necessary. The symbols are artificial and so
8913 the dimension attribute and arrayspec can also be set. In addition,
8914 sometimes the expr1 arrives as BT_DERIVED, when the symbol is BT_CLASS.
8915 This is corrected here as well.*/
8918 fixup_array_ref (gfc_expr
**expr1
, gfc_expr
*expr2
,
8919 int rank
, gfc_ref
*ref
)
8921 gfc_ref
*nref
= (*expr1
)->ref
;
8922 gfc_symbol
*sym1
= (*expr1
)->symtree
->n
.sym
;
8923 gfc_symbol
*sym2
= expr2
? expr2
->symtree
->n
.sym
: NULL
;
8924 (*expr1
)->rank
= rank
;
8925 if (sym1
->ts
.type
== BT_CLASS
)
8927 if ((*expr1
)->ts
.type
!= BT_CLASS
)
8928 (*expr1
)->ts
= sym1
->ts
;
8930 CLASS_DATA (sym1
)->attr
.dimension
= 1;
8931 if (CLASS_DATA (sym1
)->as
== NULL
&& sym2
)
8932 CLASS_DATA (sym1
)->as
8933 = gfc_copy_array_spec (CLASS_DATA (sym2
)->as
);
8937 sym1
->attr
.dimension
= 1;
8938 if (sym1
->as
== NULL
&& sym2
)
8939 sym1
->as
= gfc_copy_array_spec (sym2
->as
);
8942 for (; nref
; nref
= nref
->next
)
8943 if (nref
->next
== NULL
)
8946 if (ref
&& nref
&& nref
->type
!= REF_ARRAY
)
8947 nref
->next
= gfc_copy_ref (ref
);
8948 else if (ref
&& !nref
)
8949 (*expr1
)->ref
= gfc_copy_ref (ref
);
8954 build_loc_call (gfc_expr
*sym_expr
)
8957 loc_call
= gfc_get_expr ();
8958 loc_call
->expr_type
= EXPR_FUNCTION
;
8959 gfc_get_sym_tree ("_loc", gfc_current_ns
, &loc_call
->symtree
, false);
8960 loc_call
->symtree
->n
.sym
->attr
.flavor
= FL_PROCEDURE
;
8961 loc_call
->symtree
->n
.sym
->attr
.intrinsic
= 1;
8962 loc_call
->symtree
->n
.sym
->result
= loc_call
->symtree
->n
.sym
;
8963 gfc_commit_symbol (loc_call
->symtree
->n
.sym
);
8964 loc_call
->ts
.type
= BT_INTEGER
;
8965 loc_call
->ts
.kind
= gfc_index_integer_kind
;
8966 loc_call
->value
.function
.isym
= gfc_intrinsic_function_by_id (GFC_ISYM_LOC
);
8967 loc_call
->value
.function
.actual
= gfc_get_actual_arglist ();
8968 loc_call
->value
.function
.actual
->expr
= sym_expr
;
8969 loc_call
->where
= sym_expr
->where
;
8973 /* Resolve a SELECT TYPE statement. */
8976 resolve_select_type (gfc_code
*code
, gfc_namespace
*old_ns
)
8978 gfc_symbol
*selector_type
;
8979 gfc_code
*body
, *new_st
, *if_st
, *tail
;
8980 gfc_code
*class_is
= NULL
, *default_case
= NULL
;
8983 char name
[GFC_MAX_SYMBOL_LEN
];
8987 gfc_ref
* ref
= NULL
;
8988 gfc_expr
*selector_expr
= NULL
;
8990 ns
= code
->ext
.block
.ns
;
8993 /* Check for F03:C813. */
8994 if (code
->expr1
->ts
.type
!= BT_CLASS
8995 && !(code
->expr2
&& code
->expr2
->ts
.type
== BT_CLASS
))
8997 gfc_error ("Selector shall be polymorphic in SELECT TYPE statement "
8998 "at %L", &code
->loc
);
9002 if (!code
->expr1
->symtree
->n
.sym
->attr
.class_ok
)
9007 gfc_ref
*ref2
= NULL
;
9008 for (ref
= code
->expr2
->ref
; ref
!= NULL
; ref
= ref
->next
)
9009 if (ref
->type
== REF_COMPONENT
9010 && ref
->u
.c
.component
->ts
.type
== BT_CLASS
)
9015 if (code
->expr1
->symtree
->n
.sym
->attr
.untyped
)
9016 code
->expr1
->symtree
->n
.sym
->ts
= ref2
->u
.c
.component
->ts
;
9017 selector_type
= CLASS_DATA (ref2
->u
.c
.component
)->ts
.u
.derived
;
9021 if (code
->expr1
->symtree
->n
.sym
->attr
.untyped
)
9022 code
->expr1
->symtree
->n
.sym
->ts
= code
->expr2
->ts
;
9023 selector_type
= CLASS_DATA (code
->expr2
)->ts
.u
.derived
;
9026 if (code
->expr2
->rank
&& CLASS_DATA (code
->expr1
)->as
)
9027 CLASS_DATA (code
->expr1
)->as
->rank
= code
->expr2
->rank
;
9029 /* F2008: C803 The selector expression must not be coindexed. */
9030 if (gfc_is_coindexed (code
->expr2
))
9032 gfc_error ("Selector at %L must not be coindexed",
9033 &code
->expr2
->where
);
9040 selector_type
= CLASS_DATA (code
->expr1
)->ts
.u
.derived
;
9042 if (gfc_is_coindexed (code
->expr1
))
9044 gfc_error ("Selector at %L must not be coindexed",
9045 &code
->expr1
->where
);
9050 /* Loop over TYPE IS / CLASS IS cases. */
9051 for (body
= code
->block
; body
; body
= body
->block
)
9053 c
= body
->ext
.block
.case_list
;
9057 /* Check for repeated cases. */
9058 for (tail
= code
->block
; tail
; tail
= tail
->block
)
9060 gfc_case
*d
= tail
->ext
.block
.case_list
;
9064 if (c
->ts
.type
== d
->ts
.type
9065 && ((c
->ts
.type
== BT_DERIVED
9066 && c
->ts
.u
.derived
&& d
->ts
.u
.derived
9067 && !strcmp (c
->ts
.u
.derived
->name
,
9068 d
->ts
.u
.derived
->name
))
9069 || c
->ts
.type
== BT_UNKNOWN
9070 || (!(c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
9071 && c
->ts
.kind
== d
->ts
.kind
)))
9073 gfc_error ("TYPE IS at %L overlaps with TYPE IS at %L",
9074 &c
->where
, &d
->where
);
9080 /* Check F03:C815. */
9081 if ((c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
9082 && !selector_type
->attr
.unlimited_polymorphic
9083 && !gfc_type_is_extensible (c
->ts
.u
.derived
))
9085 gfc_error ("Derived type %qs at %L must be extensible",
9086 c
->ts
.u
.derived
->name
, &c
->where
);
9091 /* Check F03:C816. */
9092 if (c
->ts
.type
!= BT_UNKNOWN
&& !selector_type
->attr
.unlimited_polymorphic
9093 && ((c
->ts
.type
!= BT_DERIVED
&& c
->ts
.type
!= BT_CLASS
)
9094 || !gfc_type_is_extension_of (selector_type
, c
->ts
.u
.derived
)))
9096 if (c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
9097 gfc_error ("Derived type %qs at %L must be an extension of %qs",
9098 c
->ts
.u
.derived
->name
, &c
->where
, selector_type
->name
);
9100 gfc_error ("Unexpected intrinsic type %qs at %L",
9101 gfc_basic_typename (c
->ts
.type
), &c
->where
);
9106 /* Check F03:C814. */
9107 if (c
->ts
.type
== BT_CHARACTER
9108 && (c
->ts
.u
.cl
->length
!= NULL
|| c
->ts
.deferred
))
9110 gfc_error ("The type-spec at %L shall specify that each length "
9111 "type parameter is assumed", &c
->where
);
9116 /* Intercept the DEFAULT case. */
9117 if (c
->ts
.type
== BT_UNKNOWN
)
9119 /* Check F03:C818. */
9122 gfc_error ("The DEFAULT CASE at %L cannot be followed "
9123 "by a second DEFAULT CASE at %L",
9124 &default_case
->ext
.block
.case_list
->where
, &c
->where
);
9129 default_case
= body
;
9136 /* Transform SELECT TYPE statement to BLOCK and associate selector to
9137 target if present. If there are any EXIT statements referring to the
9138 SELECT TYPE construct, this is no problem because the gfc_code
9139 reference stays the same and EXIT is equally possible from the BLOCK
9140 it is changed to. */
9141 code
->op
= EXEC_BLOCK
;
9144 gfc_association_list
* assoc
;
9146 assoc
= gfc_get_association_list ();
9147 assoc
->st
= code
->expr1
->symtree
;
9148 assoc
->target
= gfc_copy_expr (code
->expr2
);
9149 assoc
->target
->where
= code
->expr2
->where
;
9150 /* assoc->variable will be set by resolve_assoc_var. */
9152 code
->ext
.block
.assoc
= assoc
;
9153 code
->expr1
->symtree
->n
.sym
->assoc
= assoc
;
9155 resolve_assoc_var (code
->expr1
->symtree
->n
.sym
, false);
9158 code
->ext
.block
.assoc
= NULL
;
9160 /* Ensure that the selector rank and arrayspec are available to
9161 correct expressions in which they might be missing. */
9162 if (code
->expr2
&& code
->expr2
->rank
)
9164 rank
= code
->expr2
->rank
;
9165 for (ref
= code
->expr2
->ref
; ref
; ref
= ref
->next
)
9166 if (ref
->next
== NULL
)
9168 if (ref
&& ref
->type
== REF_ARRAY
)
9169 ref
= gfc_copy_ref (ref
);
9171 /* Fixup expr1 if necessary. */
9173 fixup_array_ref (&code
->expr1
, code
->expr2
, rank
, ref
);
9175 else if (code
->expr1
->rank
)
9177 rank
= code
->expr1
->rank
;
9178 for (ref
= code
->expr1
->ref
; ref
; ref
= ref
->next
)
9179 if (ref
->next
== NULL
)
9181 if (ref
&& ref
->type
== REF_ARRAY
)
9182 ref
= gfc_copy_ref (ref
);
9185 /* Add EXEC_SELECT to switch on type. */
9186 new_st
= gfc_get_code (code
->op
);
9187 new_st
->expr1
= code
->expr1
;
9188 new_st
->expr2
= code
->expr2
;
9189 new_st
->block
= code
->block
;
9190 code
->expr1
= code
->expr2
= NULL
;
9195 ns
->code
->next
= new_st
;
9197 code
->op
= EXEC_SELECT_TYPE
;
9199 /* Use the intrinsic LOC function to generate an integer expression
9200 for the vtable of the selector. Note that the rank of the selector
9201 expression has to be set to zero. */
9202 gfc_add_vptr_component (code
->expr1
);
9203 code
->expr1
->rank
= 0;
9204 code
->expr1
= build_loc_call (code
->expr1
);
9205 selector_expr
= code
->expr1
->value
.function
.actual
->expr
;
9207 /* Loop over TYPE IS / CLASS IS cases. */
9208 for (body
= code
->block
; body
; body
= body
->block
)
9212 c
= body
->ext
.block
.case_list
;
9214 /* Generate an index integer expression for address of the
9215 TYPE/CLASS vtable and store it in c->low. The hash expression
9216 is stored in c->high and is used to resolve intrinsic cases. */
9217 if (c
->ts
.type
!= BT_UNKNOWN
)
9219 if (c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
9221 vtab
= gfc_find_derived_vtab (c
->ts
.u
.derived
);
9223 c
->high
= gfc_get_int_expr (gfc_integer_4_kind
, NULL
,
9224 c
->ts
.u
.derived
->hash_value
);
9228 vtab
= gfc_find_vtab (&c
->ts
);
9229 gcc_assert (vtab
&& CLASS_DATA (vtab
)->initializer
);
9230 e
= CLASS_DATA (vtab
)->initializer
;
9231 c
->high
= gfc_copy_expr (e
);
9232 if (c
->high
->ts
.kind
!= gfc_integer_4_kind
)
9235 ts
.kind
= gfc_integer_4_kind
;
9236 ts
.type
= BT_INTEGER
;
9237 gfc_convert_type_warn (c
->high
, &ts
, 2, 0);
9241 e
= gfc_lval_expr_from_sym (vtab
);
9242 c
->low
= build_loc_call (e
);
9247 /* Associate temporary to selector. This should only be done
9248 when this case is actually true, so build a new ASSOCIATE
9249 that does precisely this here (instead of using the
9252 if (c
->ts
.type
== BT_CLASS
)
9253 sprintf (name
, "__tmp_class_%s", c
->ts
.u
.derived
->name
);
9254 else if (c
->ts
.type
== BT_DERIVED
)
9255 sprintf (name
, "__tmp_type_%s", c
->ts
.u
.derived
->name
);
9256 else if (c
->ts
.type
== BT_CHARACTER
)
9258 HOST_WIDE_INT charlen
= 0;
9259 if (c
->ts
.u
.cl
&& c
->ts
.u
.cl
->length
9260 && c
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
)
9261 charlen
= gfc_mpz_get_hwi (c
->ts
.u
.cl
->length
->value
.integer
);
9262 snprintf (name
, sizeof (name
),
9263 "__tmp_%s_" HOST_WIDE_INT_PRINT_DEC
"_%d",
9264 gfc_basic_typename (c
->ts
.type
), charlen
, c
->ts
.kind
);
9267 sprintf (name
, "__tmp_%s_%d", gfc_basic_typename (c
->ts
.type
),
9270 st
= gfc_find_symtree (ns
->sym_root
, name
);
9271 gcc_assert (st
->n
.sym
->assoc
);
9272 st
->n
.sym
->assoc
->target
= gfc_get_variable_expr (selector_expr
->symtree
);
9273 st
->n
.sym
->assoc
->target
->where
= selector_expr
->where
;
9274 if (c
->ts
.type
!= BT_CLASS
&& c
->ts
.type
!= BT_UNKNOWN
)
9276 gfc_add_data_component (st
->n
.sym
->assoc
->target
);
9277 /* Fixup the target expression if necessary. */
9279 fixup_array_ref (&st
->n
.sym
->assoc
->target
, NULL
, rank
, ref
);
9282 new_st
= gfc_get_code (EXEC_BLOCK
);
9283 new_st
->ext
.block
.ns
= gfc_build_block_ns (ns
);
9284 new_st
->ext
.block
.ns
->code
= body
->next
;
9285 body
->next
= new_st
;
9287 /* Chain in the new list only if it is marked as dangling. Otherwise
9288 there is a CASE label overlap and this is already used. Just ignore,
9289 the error is diagnosed elsewhere. */
9290 if (st
->n
.sym
->assoc
->dangling
)
9292 new_st
->ext
.block
.assoc
= st
->n
.sym
->assoc
;
9293 st
->n
.sym
->assoc
->dangling
= 0;
9296 resolve_assoc_var (st
->n
.sym
, false);
9299 /* Take out CLASS IS cases for separate treatment. */
9301 while (body
&& body
->block
)
9303 if (body
->block
->ext
.block
.case_list
->ts
.type
== BT_CLASS
)
9305 /* Add to class_is list. */
9306 if (class_is
== NULL
)
9308 class_is
= body
->block
;
9313 for (tail
= class_is
; tail
->block
; tail
= tail
->block
) ;
9314 tail
->block
= body
->block
;
9317 /* Remove from EXEC_SELECT list. */
9318 body
->block
= body
->block
->block
;
9331 /* Add a default case to hold the CLASS IS cases. */
9332 for (tail
= code
; tail
->block
; tail
= tail
->block
) ;
9333 tail
->block
= gfc_get_code (EXEC_SELECT_TYPE
);
9335 tail
->ext
.block
.case_list
= gfc_get_case ();
9336 tail
->ext
.block
.case_list
->ts
.type
= BT_UNKNOWN
;
9338 default_case
= tail
;
9341 /* More than one CLASS IS block? */
9342 if (class_is
->block
)
9346 /* Sort CLASS IS blocks by extension level. */
9350 for (c1
= &class_is
; (*c1
) && (*c1
)->block
; c1
= &((*c1
)->block
))
9353 /* F03:C817 (check for doubles). */
9354 if ((*c1
)->ext
.block
.case_list
->ts
.u
.derived
->hash_value
9355 == c2
->ext
.block
.case_list
->ts
.u
.derived
->hash_value
)
9357 gfc_error ("Double CLASS IS block in SELECT TYPE "
9359 &c2
->ext
.block
.case_list
->where
);
9362 if ((*c1
)->ext
.block
.case_list
->ts
.u
.derived
->attr
.extension
9363 < c2
->ext
.block
.case_list
->ts
.u
.derived
->attr
.extension
)
9366 (*c1
)->block
= c2
->block
;
9376 /* Generate IF chain. */
9377 if_st
= gfc_get_code (EXEC_IF
);
9379 for (body
= class_is
; body
; body
= body
->block
)
9381 new_st
->block
= gfc_get_code (EXEC_IF
);
9382 new_st
= new_st
->block
;
9383 /* Set up IF condition: Call _gfortran_is_extension_of. */
9384 new_st
->expr1
= gfc_get_expr ();
9385 new_st
->expr1
->expr_type
= EXPR_FUNCTION
;
9386 new_st
->expr1
->ts
.type
= BT_LOGICAL
;
9387 new_st
->expr1
->ts
.kind
= 4;
9388 new_st
->expr1
->value
.function
.name
= gfc_get_string (PREFIX ("is_extension_of"));
9389 new_st
->expr1
->value
.function
.isym
= XCNEW (gfc_intrinsic_sym
);
9390 new_st
->expr1
->value
.function
.isym
->id
= GFC_ISYM_EXTENDS_TYPE_OF
;
9391 /* Set up arguments. */
9392 new_st
->expr1
->value
.function
.actual
= gfc_get_actual_arglist ();
9393 new_st
->expr1
->value
.function
.actual
->expr
= gfc_get_variable_expr (selector_expr
->symtree
);
9394 new_st
->expr1
->value
.function
.actual
->expr
->where
= code
->loc
;
9395 new_st
->expr1
->where
= code
->loc
;
9396 gfc_add_vptr_component (new_st
->expr1
->value
.function
.actual
->expr
);
9397 vtab
= gfc_find_derived_vtab (body
->ext
.block
.case_list
->ts
.u
.derived
);
9398 st
= gfc_find_symtree (vtab
->ns
->sym_root
, vtab
->name
);
9399 new_st
->expr1
->value
.function
.actual
->next
= gfc_get_actual_arglist ();
9400 new_st
->expr1
->value
.function
.actual
->next
->expr
= gfc_get_variable_expr (st
);
9401 new_st
->expr1
->value
.function
.actual
->next
->expr
->where
= code
->loc
;
9402 new_st
->next
= body
->next
;
9404 if (default_case
->next
)
9406 new_st
->block
= gfc_get_code (EXEC_IF
);
9407 new_st
= new_st
->block
;
9408 new_st
->next
= default_case
->next
;
9411 /* Replace CLASS DEFAULT code by the IF chain. */
9412 default_case
->next
= if_st
;
9415 /* Resolve the internal code. This cannot be done earlier because
9416 it requires that the sym->assoc of selectors is set already. */
9417 gfc_current_ns
= ns
;
9418 gfc_resolve_blocks (code
->block
, gfc_current_ns
);
9419 gfc_current_ns
= old_ns
;
9426 /* Resolve a transfer statement. This is making sure that:
9427 -- a derived type being transferred has only non-pointer components
9428 -- a derived type being transferred doesn't have private components, unless
9429 it's being transferred from the module where the type was defined
9430 -- we're not trying to transfer a whole assumed size array. */
9433 resolve_transfer (gfc_code
*code
)
9435 gfc_symbol
*sym
, *derived
;
9439 bool formatted
= false;
9440 gfc_dt
*dt
= code
->ext
.dt
;
9441 gfc_symbol
*dtio_sub
= NULL
;
9445 while (exp
!= NULL
&& exp
->expr_type
== EXPR_OP
9446 && exp
->value
.op
.op
== INTRINSIC_PARENTHESES
)
9447 exp
= exp
->value
.op
.op1
;
9449 if (exp
&& exp
->expr_type
== EXPR_NULL
9452 gfc_error ("Invalid context for NULL () intrinsic at %L",
9457 if (exp
== NULL
|| (exp
->expr_type
!= EXPR_VARIABLE
9458 && exp
->expr_type
!= EXPR_FUNCTION
9459 && exp
->expr_type
!= EXPR_STRUCTURE
))
9462 /* If we are reading, the variable will be changed. Note that
9463 code->ext.dt may be NULL if the TRANSFER is related to
9464 an INQUIRE statement -- but in this case, we are not reading, either. */
9465 if (dt
&& dt
->dt_io_kind
->value
.iokind
== M_READ
9466 && !gfc_check_vardef_context (exp
, false, false, false,
9470 const gfc_typespec
*ts
= exp
->expr_type
== EXPR_STRUCTURE
9471 || exp
->expr_type
== EXPR_FUNCTION
9472 ? &exp
->ts
: &exp
->symtree
->n
.sym
->ts
;
9474 /* Go to actual component transferred. */
9475 for (ref
= exp
->ref
; ref
; ref
= ref
->next
)
9476 if (ref
->type
== REF_COMPONENT
)
9477 ts
= &ref
->u
.c
.component
->ts
;
9479 if (dt
&& dt
->dt_io_kind
->value
.iokind
!= M_INQUIRE
9480 && (ts
->type
== BT_DERIVED
|| ts
->type
== BT_CLASS
))
9482 derived
= ts
->u
.derived
;
9484 /* Determine when to use the formatted DTIO procedure. */
9485 if (dt
&& (dt
->format_expr
|| dt
->format_label
))
9488 write
= dt
->dt_io_kind
->value
.iokind
== M_WRITE
9489 || dt
->dt_io_kind
->value
.iokind
== M_PRINT
;
9490 dtio_sub
= gfc_find_specific_dtio_proc (derived
, write
, formatted
);
9492 if (dtio_sub
!= NULL
&& exp
->expr_type
== EXPR_VARIABLE
)
9495 sym
= exp
->symtree
->n
.sym
->ns
->proc_name
;
9496 /* Check to see if this is a nested DTIO call, with the
9497 dummy as the io-list object. */
9498 if (sym
&& sym
== dtio_sub
&& sym
->formal
9499 && sym
->formal
->sym
== exp
->symtree
->n
.sym
9500 && exp
->ref
== NULL
)
9502 if (!sym
->attr
.recursive
)
9504 gfc_error ("DTIO %s procedure at %L must be recursive",
9505 sym
->name
, &sym
->declared_at
);
9512 if (ts
->type
== BT_CLASS
&& dtio_sub
== NULL
)
9514 gfc_error ("Data transfer element at %L cannot be polymorphic unless "
9515 "it is processed by a defined input/output procedure",
9520 if (ts
->type
== BT_DERIVED
)
9522 /* Check that transferred derived type doesn't contain POINTER
9523 components unless it is processed by a defined input/output
9525 if (ts
->u
.derived
->attr
.pointer_comp
&& dtio_sub
== NULL
)
9527 gfc_error ("Data transfer element at %L cannot have POINTER "
9528 "components unless it is processed by a defined "
9529 "input/output procedure", &code
->loc
);
9534 if (ts
->u
.derived
->attr
.proc_pointer_comp
)
9536 gfc_error ("Data transfer element at %L cannot have "
9537 "procedure pointer components", &code
->loc
);
9541 if (ts
->u
.derived
->attr
.alloc_comp
&& dtio_sub
== NULL
)
9543 gfc_error ("Data transfer element at %L cannot have ALLOCATABLE "
9544 "components unless it is processed by a defined "
9545 "input/output procedure", &code
->loc
);
9549 /* C_PTR and C_FUNPTR have private components which means they cannot
9550 be printed. However, if -std=gnu and not -pedantic, allow
9551 the component to be printed to help debugging. */
9552 if (ts
->u
.derived
->ts
.f90_type
== BT_VOID
)
9554 if (!gfc_notify_std (GFC_STD_GNU
, "Data transfer element at %L "
9555 "cannot have PRIVATE components", &code
->loc
))
9558 else if (derived_inaccessible (ts
->u
.derived
) && dtio_sub
== NULL
)
9560 gfc_error ("Data transfer element at %L cannot have "
9561 "PRIVATE components unless it is processed by "
9562 "a defined input/output procedure", &code
->loc
);
9567 if (exp
->expr_type
== EXPR_STRUCTURE
)
9570 sym
= exp
->symtree
->n
.sym
;
9572 if (sym
->as
!= NULL
&& sym
->as
->type
== AS_ASSUMED_SIZE
&& exp
->ref
9573 && exp
->ref
->type
== REF_ARRAY
&& exp
->ref
->u
.ar
.type
== AR_FULL
)
9575 gfc_error ("Data transfer element at %L cannot be a full reference to "
9576 "an assumed-size array", &code
->loc
);
9580 if (async_io_dt
&& exp
->expr_type
== EXPR_VARIABLE
)
9581 exp
->symtree
->n
.sym
->attr
.asynchronous
= 1;
9585 /*********** Toplevel code resolution subroutines ***********/
9587 /* Find the set of labels that are reachable from this block. We also
9588 record the last statement in each block. */
9591 find_reachable_labels (gfc_code
*block
)
9598 cs_base
->reachable_labels
= bitmap_alloc (&labels_obstack
);
9600 /* Collect labels in this block. We don't keep those corresponding
9601 to END {IF|SELECT}, these are checked in resolve_branch by going
9602 up through the code_stack. */
9603 for (c
= block
; c
; c
= c
->next
)
9605 if (c
->here
&& c
->op
!= EXEC_END_NESTED_BLOCK
)
9606 bitmap_set_bit (cs_base
->reachable_labels
, c
->here
->value
);
9609 /* Merge with labels from parent block. */
9612 gcc_assert (cs_base
->prev
->reachable_labels
);
9613 bitmap_ior_into (cs_base
->reachable_labels
,
9614 cs_base
->prev
->reachable_labels
);
9620 resolve_lock_unlock_event (gfc_code
*code
)
9622 if (code
->expr1
->expr_type
== EXPR_FUNCTION
9623 && code
->expr1
->value
.function
.isym
9624 && code
->expr1
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
)
9625 remove_caf_get_intrinsic (code
->expr1
);
9627 if ((code
->op
== EXEC_LOCK
|| code
->op
== EXEC_UNLOCK
)
9628 && (code
->expr1
->ts
.type
!= BT_DERIVED
9629 || code
->expr1
->expr_type
!= EXPR_VARIABLE
9630 || code
->expr1
->ts
.u
.derived
->from_intmod
!= INTMOD_ISO_FORTRAN_ENV
9631 || code
->expr1
->ts
.u
.derived
->intmod_sym_id
!= ISOFORTRAN_LOCK_TYPE
9632 || code
->expr1
->rank
!= 0
9633 || (!gfc_is_coarray (code
->expr1
) &&
9634 !gfc_is_coindexed (code
->expr1
))))
9635 gfc_error ("Lock variable at %L must be a scalar of type LOCK_TYPE",
9636 &code
->expr1
->where
);
9637 else if ((code
->op
== EXEC_EVENT_POST
|| code
->op
== EXEC_EVENT_WAIT
)
9638 && (code
->expr1
->ts
.type
!= BT_DERIVED
9639 || code
->expr1
->expr_type
!= EXPR_VARIABLE
9640 || code
->expr1
->ts
.u
.derived
->from_intmod
9641 != INTMOD_ISO_FORTRAN_ENV
9642 || code
->expr1
->ts
.u
.derived
->intmod_sym_id
9643 != ISOFORTRAN_EVENT_TYPE
9644 || code
->expr1
->rank
!= 0))
9645 gfc_error ("Event variable at %L must be a scalar of type EVENT_TYPE",
9646 &code
->expr1
->where
);
9647 else if (code
->op
== EXEC_EVENT_POST
&& !gfc_is_coarray (code
->expr1
)
9648 && !gfc_is_coindexed (code
->expr1
))
9649 gfc_error ("Event variable argument at %L must be a coarray or coindexed",
9650 &code
->expr1
->where
);
9651 else if (code
->op
== EXEC_EVENT_WAIT
&& !gfc_is_coarray (code
->expr1
))
9652 gfc_error ("Event variable argument at %L must be a coarray but not "
9653 "coindexed", &code
->expr1
->where
);
9657 && (code
->expr2
->ts
.type
!= BT_INTEGER
|| code
->expr2
->rank
!= 0
9658 || code
->expr2
->expr_type
!= EXPR_VARIABLE
))
9659 gfc_error ("STAT= argument at %L must be a scalar INTEGER variable",
9660 &code
->expr2
->where
);
9663 && !gfc_check_vardef_context (code
->expr2
, false, false, false,
9664 _("STAT variable")))
9669 && (code
->expr3
->ts
.type
!= BT_CHARACTER
|| code
->expr3
->rank
!= 0
9670 || code
->expr3
->expr_type
!= EXPR_VARIABLE
))
9671 gfc_error ("ERRMSG= argument at %L must be a scalar CHARACTER variable",
9672 &code
->expr3
->where
);
9675 && !gfc_check_vardef_context (code
->expr3
, false, false, false,
9676 _("ERRMSG variable")))
9679 /* Check for LOCK the ACQUIRED_LOCK. */
9680 if (code
->op
!= EXEC_EVENT_WAIT
&& code
->expr4
9681 && (code
->expr4
->ts
.type
!= BT_LOGICAL
|| code
->expr4
->rank
!= 0
9682 || code
->expr4
->expr_type
!= EXPR_VARIABLE
))
9683 gfc_error ("ACQUIRED_LOCK= argument at %L must be a scalar LOGICAL "
9684 "variable", &code
->expr4
->where
);
9686 if (code
->op
!= EXEC_EVENT_WAIT
&& code
->expr4
9687 && !gfc_check_vardef_context (code
->expr4
, false, false, false,
9688 _("ACQUIRED_LOCK variable")))
9691 /* Check for EVENT WAIT the UNTIL_COUNT. */
9692 if (code
->op
== EXEC_EVENT_WAIT
&& code
->expr4
)
9694 if (!gfc_resolve_expr (code
->expr4
) || code
->expr4
->ts
.type
!= BT_INTEGER
9695 || code
->expr4
->rank
!= 0)
9696 gfc_error ("UNTIL_COUNT= argument at %L must be a scalar INTEGER "
9697 "expression", &code
->expr4
->where
);
9703 resolve_critical (gfc_code
*code
)
9705 gfc_symtree
*symtree
;
9706 gfc_symbol
*lock_type
;
9707 char name
[GFC_MAX_SYMBOL_LEN
];
9708 static int serial
= 0;
9710 if (flag_coarray
!= GFC_FCOARRAY_LIB
)
9713 symtree
= gfc_find_symtree (gfc_current_ns
->sym_root
,
9714 GFC_PREFIX ("lock_type"));
9716 lock_type
= symtree
->n
.sym
;
9719 if (gfc_get_sym_tree (GFC_PREFIX ("lock_type"), gfc_current_ns
, &symtree
,
9722 lock_type
= symtree
->n
.sym
;
9723 lock_type
->attr
.flavor
= FL_DERIVED
;
9724 lock_type
->attr
.zero_comp
= 1;
9725 lock_type
->from_intmod
= INTMOD_ISO_FORTRAN_ENV
;
9726 lock_type
->intmod_sym_id
= ISOFORTRAN_LOCK_TYPE
;
9729 sprintf(name
, GFC_PREFIX ("lock_var") "%d",serial
++);
9730 if (gfc_get_sym_tree (name
, gfc_current_ns
, &symtree
, false) != 0)
9733 code
->resolved_sym
= symtree
->n
.sym
;
9734 symtree
->n
.sym
->attr
.flavor
= FL_VARIABLE
;
9735 symtree
->n
.sym
->attr
.referenced
= 1;
9736 symtree
->n
.sym
->attr
.artificial
= 1;
9737 symtree
->n
.sym
->attr
.codimension
= 1;
9738 symtree
->n
.sym
->ts
.type
= BT_DERIVED
;
9739 symtree
->n
.sym
->ts
.u
.derived
= lock_type
;
9740 symtree
->n
.sym
->as
= gfc_get_array_spec ();
9741 symtree
->n
.sym
->as
->corank
= 1;
9742 symtree
->n
.sym
->as
->type
= AS_EXPLICIT
;
9743 symtree
->n
.sym
->as
->cotype
= AS_EXPLICIT
;
9744 symtree
->n
.sym
->as
->lower
[0] = gfc_get_int_expr (gfc_default_integer_kind
,
9746 gfc_commit_symbols();
9751 resolve_sync (gfc_code
*code
)
9753 /* Check imageset. The * case matches expr1 == NULL. */
9756 if (code
->expr1
->ts
.type
!= BT_INTEGER
|| code
->expr1
->rank
> 1)
9757 gfc_error ("Imageset argument at %L must be a scalar or rank-1 "
9758 "INTEGER expression", &code
->expr1
->where
);
9759 if (code
->expr1
->expr_type
== EXPR_CONSTANT
&& code
->expr1
->rank
== 0
9760 && mpz_cmp_si (code
->expr1
->value
.integer
, 1) < 0)
9761 gfc_error ("Imageset argument at %L must between 1 and num_images()",
9762 &code
->expr1
->where
);
9763 else if (code
->expr1
->expr_type
== EXPR_ARRAY
9764 && gfc_simplify_expr (code
->expr1
, 0))
9766 gfc_constructor
*cons
;
9767 cons
= gfc_constructor_first (code
->expr1
->value
.constructor
);
9768 for (; cons
; cons
= gfc_constructor_next (cons
))
9769 if (cons
->expr
->expr_type
== EXPR_CONSTANT
9770 && mpz_cmp_si (cons
->expr
->value
.integer
, 1) < 0)
9771 gfc_error ("Imageset argument at %L must between 1 and "
9772 "num_images()", &cons
->expr
->where
);
9777 gfc_resolve_expr (code
->expr2
);
9779 && (code
->expr2
->ts
.type
!= BT_INTEGER
|| code
->expr2
->rank
!= 0
9780 || code
->expr2
->expr_type
!= EXPR_VARIABLE
))
9781 gfc_error ("STAT= argument at %L must be a scalar INTEGER variable",
9782 &code
->expr2
->where
);
9785 gfc_resolve_expr (code
->expr3
);
9787 && (code
->expr3
->ts
.type
!= BT_CHARACTER
|| code
->expr3
->rank
!= 0
9788 || code
->expr3
->expr_type
!= EXPR_VARIABLE
))
9789 gfc_error ("ERRMSG= argument at %L must be a scalar CHARACTER variable",
9790 &code
->expr3
->where
);
9794 /* Given a branch to a label, see if the branch is conforming.
9795 The code node describes where the branch is located. */
9798 resolve_branch (gfc_st_label
*label
, gfc_code
*code
)
9805 /* Step one: is this a valid branching target? */
9807 if (label
->defined
== ST_LABEL_UNKNOWN
)
9809 gfc_error ("Label %d referenced at %L is never defined", label
->value
,
9814 if (label
->defined
!= ST_LABEL_TARGET
&& label
->defined
!= ST_LABEL_DO_TARGET
)
9816 gfc_error ("Statement at %L is not a valid branch target statement "
9817 "for the branch statement at %L", &label
->where
, &code
->loc
);
9821 /* Step two: make sure this branch is not a branch to itself ;-) */
9823 if (code
->here
== label
)
9826 "Branch at %L may result in an infinite loop", &code
->loc
);
9830 /* Step three: See if the label is in the same block as the
9831 branching statement. The hard work has been done by setting up
9832 the bitmap reachable_labels. */
9834 if (bitmap_bit_p (cs_base
->reachable_labels
, label
->value
))
9836 /* Check now whether there is a CRITICAL construct; if so, check
9837 whether the label is still visible outside of the CRITICAL block,
9838 which is invalid. */
9839 for (stack
= cs_base
; stack
; stack
= stack
->prev
)
9841 if (stack
->current
->op
== EXEC_CRITICAL
9842 && bitmap_bit_p (stack
->reachable_labels
, label
->value
))
9843 gfc_error ("GOTO statement at %L leaves CRITICAL construct for "
9844 "label at %L", &code
->loc
, &label
->where
);
9845 else if (stack
->current
->op
== EXEC_DO_CONCURRENT
9846 && bitmap_bit_p (stack
->reachable_labels
, label
->value
))
9847 gfc_error ("GOTO statement at %L leaves DO CONCURRENT construct "
9848 "for label at %L", &code
->loc
, &label
->where
);
9854 /* Step four: If we haven't found the label in the bitmap, it may
9855 still be the label of the END of the enclosing block, in which
9856 case we find it by going up the code_stack. */
9858 for (stack
= cs_base
; stack
; stack
= stack
->prev
)
9860 if (stack
->current
->next
&& stack
->current
->next
->here
== label
)
9862 if (stack
->current
->op
== EXEC_CRITICAL
)
9864 /* Note: A label at END CRITICAL does not leave the CRITICAL
9865 construct as END CRITICAL is still part of it. */
9866 gfc_error ("GOTO statement at %L leaves CRITICAL construct for label"
9867 " at %L", &code
->loc
, &label
->where
);
9870 else if (stack
->current
->op
== EXEC_DO_CONCURRENT
)
9872 gfc_error ("GOTO statement at %L leaves DO CONCURRENT construct for "
9873 "label at %L", &code
->loc
, &label
->where
);
9880 gcc_assert (stack
->current
->next
->op
== EXEC_END_NESTED_BLOCK
);
9884 /* The label is not in an enclosing block, so illegal. This was
9885 allowed in Fortran 66, so we allow it as extension. No
9886 further checks are necessary in this case. */
9887 gfc_notify_std (GFC_STD_LEGACY
, "Label at %L is not in the same block "
9888 "as the GOTO statement at %L", &label
->where
,
9894 /* Check whether EXPR1 has the same shape as EXPR2. */
9897 resolve_where_shape (gfc_expr
*expr1
, gfc_expr
*expr2
)
9899 mpz_t shape
[GFC_MAX_DIMENSIONS
];
9900 mpz_t shape2
[GFC_MAX_DIMENSIONS
];
9901 bool result
= false;
9904 /* Compare the rank. */
9905 if (expr1
->rank
!= expr2
->rank
)
9908 /* Compare the size of each dimension. */
9909 for (i
=0; i
<expr1
->rank
; i
++)
9911 if (!gfc_array_dimen_size (expr1
, i
, &shape
[i
]))
9914 if (!gfc_array_dimen_size (expr2
, i
, &shape2
[i
]))
9917 if (mpz_cmp (shape
[i
], shape2
[i
]))
9921 /* When either of the two expression is an assumed size array, we
9922 ignore the comparison of dimension sizes. */
9927 gfc_clear_shape (shape
, i
);
9928 gfc_clear_shape (shape2
, i
);
9933 /* Check whether a WHERE assignment target or a WHERE mask expression
9934 has the same shape as the outmost WHERE mask expression. */
9937 resolve_where (gfc_code
*code
, gfc_expr
*mask
)
9943 cblock
= code
->block
;
9945 /* Store the first WHERE mask-expr of the WHERE statement or construct.
9946 In case of nested WHERE, only the outmost one is stored. */
9947 if (mask
== NULL
) /* outmost WHERE */
9949 else /* inner WHERE */
9956 /* Check if the mask-expr has a consistent shape with the
9957 outmost WHERE mask-expr. */
9958 if (!resolve_where_shape (cblock
->expr1
, e
))
9959 gfc_error ("WHERE mask at %L has inconsistent shape",
9960 &cblock
->expr1
->where
);
9963 /* the assignment statement of a WHERE statement, or the first
9964 statement in where-body-construct of a WHERE construct */
9965 cnext
= cblock
->next
;
9970 /* WHERE assignment statement */
9973 /* Check shape consistent for WHERE assignment target. */
9974 if (e
&& !resolve_where_shape (cnext
->expr1
, e
))
9975 gfc_error ("WHERE assignment target at %L has "
9976 "inconsistent shape", &cnext
->expr1
->where
);
9980 case EXEC_ASSIGN_CALL
:
9981 resolve_call (cnext
);
9982 if (!cnext
->resolved_sym
->attr
.elemental
)
9983 gfc_error("Non-ELEMENTAL user-defined assignment in WHERE at %L",
9984 &cnext
->ext
.actual
->expr
->where
);
9987 /* WHERE or WHERE construct is part of a where-body-construct */
9989 resolve_where (cnext
, e
);
9993 gfc_error ("Unsupported statement inside WHERE at %L",
9996 /* the next statement within the same where-body-construct */
9997 cnext
= cnext
->next
;
9999 /* the next masked-elsewhere-stmt, elsewhere-stmt, or end-where-stmt */
10000 cblock
= cblock
->block
;
10005 /* Resolve assignment in FORALL construct.
10006 NVAR is the number of FORALL index variables, and VAR_EXPR records the
10007 FORALL index variables. */
10010 gfc_resolve_assign_in_forall (gfc_code
*code
, int nvar
, gfc_expr
**var_expr
)
10014 for (n
= 0; n
< nvar
; n
++)
10016 gfc_symbol
*forall_index
;
10018 forall_index
= var_expr
[n
]->symtree
->n
.sym
;
10020 /* Check whether the assignment target is one of the FORALL index
10022 if ((code
->expr1
->expr_type
== EXPR_VARIABLE
)
10023 && (code
->expr1
->symtree
->n
.sym
== forall_index
))
10024 gfc_error ("Assignment to a FORALL index variable at %L",
10025 &code
->expr1
->where
);
10028 /* If one of the FORALL index variables doesn't appear in the
10029 assignment variable, then there could be a many-to-one
10030 assignment. Emit a warning rather than an error because the
10031 mask could be resolving this problem. */
10032 if (!find_forall_index (code
->expr1
, forall_index
, 0))
10033 gfc_warning (0, "The FORALL with index %qs is not used on the "
10034 "left side of the assignment at %L and so might "
10035 "cause multiple assignment to this object",
10036 var_expr
[n
]->symtree
->name
, &code
->expr1
->where
);
10042 /* Resolve WHERE statement in FORALL construct. */
10045 gfc_resolve_where_code_in_forall (gfc_code
*code
, int nvar
,
10046 gfc_expr
**var_expr
)
10051 cblock
= code
->block
;
10054 /* the assignment statement of a WHERE statement, or the first
10055 statement in where-body-construct of a WHERE construct */
10056 cnext
= cblock
->next
;
10061 /* WHERE assignment statement */
10063 gfc_resolve_assign_in_forall (cnext
, nvar
, var_expr
);
10066 /* WHERE operator assignment statement */
10067 case EXEC_ASSIGN_CALL
:
10068 resolve_call (cnext
);
10069 if (!cnext
->resolved_sym
->attr
.elemental
)
10070 gfc_error("Non-ELEMENTAL user-defined assignment in WHERE at %L",
10071 &cnext
->ext
.actual
->expr
->where
);
10074 /* WHERE or WHERE construct is part of a where-body-construct */
10076 gfc_resolve_where_code_in_forall (cnext
, nvar
, var_expr
);
10080 gfc_error ("Unsupported statement inside WHERE at %L",
10083 /* the next statement within the same where-body-construct */
10084 cnext
= cnext
->next
;
10086 /* the next masked-elsewhere-stmt, elsewhere-stmt, or end-where-stmt */
10087 cblock
= cblock
->block
;
10092 /* Traverse the FORALL body to check whether the following errors exist:
10093 1. For assignment, check if a many-to-one assignment happens.
10094 2. For WHERE statement, check the WHERE body to see if there is any
10095 many-to-one assignment. */
10098 gfc_resolve_forall_body (gfc_code
*code
, int nvar
, gfc_expr
**var_expr
)
10102 c
= code
->block
->next
;
10108 case EXEC_POINTER_ASSIGN
:
10109 gfc_resolve_assign_in_forall (c
, nvar
, var_expr
);
10112 case EXEC_ASSIGN_CALL
:
10116 /* Because the gfc_resolve_blocks() will handle the nested FORALL,
10117 there is no need to handle it here. */
10121 gfc_resolve_where_code_in_forall(c
, nvar
, var_expr
);
10126 /* The next statement in the FORALL body. */
10132 /* Counts the number of iterators needed inside a forall construct, including
10133 nested forall constructs. This is used to allocate the needed memory
10134 in gfc_resolve_forall. */
10137 gfc_count_forall_iterators (gfc_code
*code
)
10139 int max_iters
, sub_iters
, current_iters
;
10140 gfc_forall_iterator
*fa
;
10142 gcc_assert(code
->op
== EXEC_FORALL
);
10146 for (fa
= code
->ext
.forall_iterator
; fa
; fa
= fa
->next
)
10149 code
= code
->block
->next
;
10153 if (code
->op
== EXEC_FORALL
)
10155 sub_iters
= gfc_count_forall_iterators (code
);
10156 if (sub_iters
> max_iters
)
10157 max_iters
= sub_iters
;
10162 return current_iters
+ max_iters
;
10166 /* Given a FORALL construct, first resolve the FORALL iterator, then call
10167 gfc_resolve_forall_body to resolve the FORALL body. */
10170 gfc_resolve_forall (gfc_code
*code
, gfc_namespace
*ns
, int forall_save
)
10172 static gfc_expr
**var_expr
;
10173 static int total_var
= 0;
10174 static int nvar
= 0;
10175 int i
, old_nvar
, tmp
;
10176 gfc_forall_iterator
*fa
;
10180 if (!gfc_notify_std (GFC_STD_F2018_OBS
, "FORALL construct at %L", &code
->loc
))
10183 /* Start to resolve a FORALL construct */
10184 if (forall_save
== 0)
10186 /* Count the total number of FORALL indices in the nested FORALL
10187 construct in order to allocate the VAR_EXPR with proper size. */
10188 total_var
= gfc_count_forall_iterators (code
);
10190 /* Allocate VAR_EXPR with NUMBER_OF_FORALL_INDEX elements. */
10191 var_expr
= XCNEWVEC (gfc_expr
*, total_var
);
10194 /* The information about FORALL iterator, including FORALL indices start, end
10195 and stride. An outer FORALL indice cannot appear in start, end or stride. */
10196 for (fa
= code
->ext
.forall_iterator
; fa
; fa
= fa
->next
)
10198 /* Fortran 20008: C738 (R753). */
10199 if (fa
->var
->ref
&& fa
->var
->ref
->type
== REF_ARRAY
)
10201 gfc_error ("FORALL index-name at %L must be a scalar variable "
10202 "of type integer", &fa
->var
->where
);
10206 /* Check if any outer FORALL index name is the same as the current
10208 for (i
= 0; i
< nvar
; i
++)
10210 if (fa
->var
->symtree
->n
.sym
== var_expr
[i
]->symtree
->n
.sym
)
10211 gfc_error ("An outer FORALL construct already has an index "
10212 "with this name %L", &fa
->var
->where
);
10215 /* Record the current FORALL index. */
10216 var_expr
[nvar
] = gfc_copy_expr (fa
->var
);
10220 /* No memory leak. */
10221 gcc_assert (nvar
<= total_var
);
10224 /* Resolve the FORALL body. */
10225 gfc_resolve_forall_body (code
, nvar
, var_expr
);
10227 /* May call gfc_resolve_forall to resolve the inner FORALL loop. */
10228 gfc_resolve_blocks (code
->block
, ns
);
10232 /* Free only the VAR_EXPRs allocated in this frame. */
10233 for (i
= nvar
; i
< tmp
; i
++)
10234 gfc_free_expr (var_expr
[i
]);
10238 /* We are in the outermost FORALL construct. */
10239 gcc_assert (forall_save
== 0);
10241 /* VAR_EXPR is not needed any more. */
10248 /* Resolve a BLOCK construct statement. */
10251 resolve_block_construct (gfc_code
* code
)
10253 /* Resolve the BLOCK's namespace. */
10254 gfc_resolve (code
->ext
.block
.ns
);
10256 /* For an ASSOCIATE block, the associations (and their targets) are already
10257 resolved during resolve_symbol. */
10261 /* Resolve lists of blocks found in IF, SELECT CASE, WHERE, FORALL, GOTO and
10265 gfc_resolve_blocks (gfc_code
*b
, gfc_namespace
*ns
)
10269 for (; b
; b
= b
->block
)
10271 t
= gfc_resolve_expr (b
->expr1
);
10272 if (!gfc_resolve_expr (b
->expr2
))
10278 if (t
&& b
->expr1
!= NULL
10279 && (b
->expr1
->ts
.type
!= BT_LOGICAL
|| b
->expr1
->rank
!= 0))
10280 gfc_error ("IF clause at %L requires a scalar LOGICAL expression",
10286 && b
->expr1
!= NULL
10287 && (b
->expr1
->ts
.type
!= BT_LOGICAL
|| b
->expr1
->rank
== 0))
10288 gfc_error ("WHERE/ELSEWHERE clause at %L requires a LOGICAL array",
10293 resolve_branch (b
->label1
, b
);
10297 resolve_block_construct (b
);
10301 case EXEC_SELECT_TYPE
:
10304 case EXEC_DO_WHILE
:
10305 case EXEC_DO_CONCURRENT
:
10306 case EXEC_CRITICAL
:
10309 case EXEC_IOLENGTH
:
10313 case EXEC_OMP_ATOMIC
:
10314 case EXEC_OACC_ATOMIC
:
10316 gfc_omp_atomic_op aop
10317 = (gfc_omp_atomic_op
) (b
->ext
.omp_atomic
& GFC_OMP_ATOMIC_MASK
);
10319 /* Verify this before calling gfc_resolve_code, which might
10321 gcc_assert (b
->next
&& b
->next
->op
== EXEC_ASSIGN
);
10322 gcc_assert (((aop
!= GFC_OMP_ATOMIC_CAPTURE
)
10323 && b
->next
->next
== NULL
)
10324 || ((aop
== GFC_OMP_ATOMIC_CAPTURE
)
10325 && b
->next
->next
!= NULL
10326 && b
->next
->next
->op
== EXEC_ASSIGN
10327 && b
->next
->next
->next
== NULL
));
10331 case EXEC_OACC_PARALLEL_LOOP
:
10332 case EXEC_OACC_PARALLEL
:
10333 case EXEC_OACC_KERNELS_LOOP
:
10334 case EXEC_OACC_KERNELS
:
10335 case EXEC_OACC_DATA
:
10336 case EXEC_OACC_HOST_DATA
:
10337 case EXEC_OACC_LOOP
:
10338 case EXEC_OACC_UPDATE
:
10339 case EXEC_OACC_WAIT
:
10340 case EXEC_OACC_CACHE
:
10341 case EXEC_OACC_ENTER_DATA
:
10342 case EXEC_OACC_EXIT_DATA
:
10343 case EXEC_OACC_ROUTINE
:
10344 case EXEC_OMP_CRITICAL
:
10345 case EXEC_OMP_DISTRIBUTE
:
10346 case EXEC_OMP_DISTRIBUTE_PARALLEL_DO
:
10347 case EXEC_OMP_DISTRIBUTE_PARALLEL_DO_SIMD
:
10348 case EXEC_OMP_DISTRIBUTE_SIMD
:
10350 case EXEC_OMP_DO_SIMD
:
10351 case EXEC_OMP_MASTER
:
10352 case EXEC_OMP_ORDERED
:
10353 case EXEC_OMP_PARALLEL
:
10354 case EXEC_OMP_PARALLEL_DO
:
10355 case EXEC_OMP_PARALLEL_DO_SIMD
:
10356 case EXEC_OMP_PARALLEL_SECTIONS
:
10357 case EXEC_OMP_PARALLEL_WORKSHARE
:
10358 case EXEC_OMP_SECTIONS
:
10359 case EXEC_OMP_SIMD
:
10360 case EXEC_OMP_SINGLE
:
10361 case EXEC_OMP_TARGET
:
10362 case EXEC_OMP_TARGET_DATA
:
10363 case EXEC_OMP_TARGET_ENTER_DATA
:
10364 case EXEC_OMP_TARGET_EXIT_DATA
:
10365 case EXEC_OMP_TARGET_PARALLEL
:
10366 case EXEC_OMP_TARGET_PARALLEL_DO
:
10367 case EXEC_OMP_TARGET_PARALLEL_DO_SIMD
:
10368 case EXEC_OMP_TARGET_SIMD
:
10369 case EXEC_OMP_TARGET_TEAMS
:
10370 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE
:
10371 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO
:
10372 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
10373 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_SIMD
:
10374 case EXEC_OMP_TARGET_UPDATE
:
10375 case EXEC_OMP_TASK
:
10376 case EXEC_OMP_TASKGROUP
:
10377 case EXEC_OMP_TASKLOOP
:
10378 case EXEC_OMP_TASKLOOP_SIMD
:
10379 case EXEC_OMP_TASKWAIT
:
10380 case EXEC_OMP_TASKYIELD
:
10381 case EXEC_OMP_TEAMS
:
10382 case EXEC_OMP_TEAMS_DISTRIBUTE
:
10383 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO
:
10384 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
10385 case EXEC_OMP_TEAMS_DISTRIBUTE_SIMD
:
10386 case EXEC_OMP_WORKSHARE
:
10390 gfc_internal_error ("gfc_resolve_blocks(): Bad block type");
10393 gfc_resolve_code (b
->next
, ns
);
10398 /* Does everything to resolve an ordinary assignment. Returns true
10399 if this is an interface assignment. */
10401 resolve_ordinary_assign (gfc_code
*code
, gfc_namespace
*ns
)
10408 symbol_attribute attr
;
10410 if (gfc_extend_assign (code
, ns
))
10414 if (code
->op
== EXEC_ASSIGN_CALL
)
10416 lhs
= code
->ext
.actual
->expr
;
10417 rhsptr
= &code
->ext
.actual
->next
->expr
;
10421 gfc_actual_arglist
* args
;
10422 gfc_typebound_proc
* tbp
;
10424 gcc_assert (code
->op
== EXEC_COMPCALL
);
10426 args
= code
->expr1
->value
.compcall
.actual
;
10428 rhsptr
= &args
->next
->expr
;
10430 tbp
= code
->expr1
->value
.compcall
.tbp
;
10431 gcc_assert (!tbp
->is_generic
);
10434 /* Make a temporary rhs when there is a default initializer
10435 and rhs is the same symbol as the lhs. */
10436 if ((*rhsptr
)->expr_type
== EXPR_VARIABLE
10437 && (*rhsptr
)->symtree
->n
.sym
->ts
.type
== BT_DERIVED
10438 && gfc_has_default_initializer ((*rhsptr
)->symtree
->n
.sym
->ts
.u
.derived
)
10439 && (lhs
->symtree
->n
.sym
== (*rhsptr
)->symtree
->n
.sym
))
10440 *rhsptr
= gfc_get_parentheses (*rhsptr
);
10449 && !gfc_notify_std (GFC_STD_GNU
, "BOZ literal at %L outside "
10450 "a DATA statement and outside INT/REAL/DBLE/CMPLX",
10454 /* Handle the case of a BOZ literal on the RHS. */
10455 if (rhs
->is_boz
&& lhs
->ts
.type
!= BT_INTEGER
)
10458 if (warn_surprising
)
10459 gfc_warning (OPT_Wsurprising
,
10460 "BOZ literal at %L is bitwise transferred "
10461 "non-integer symbol %qs", &code
->loc
,
10462 lhs
->symtree
->n
.sym
->name
);
10464 if (!gfc_convert_boz (rhs
, &lhs
->ts
))
10466 if ((rc
= gfc_range_check (rhs
)) != ARITH_OK
)
10468 if (rc
== ARITH_UNDERFLOW
)
10469 gfc_error ("Arithmetic underflow 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_OVERFLOW
)
10473 gfc_error ("Arithmetic overflow of bit-wise transferred BOZ at %L"
10474 ". This check can be disabled with the option "
10475 "%<-fno-range-check%>", &rhs
->where
);
10476 else if (rc
== ARITH_NAN
)
10477 gfc_error ("Arithmetic NaN of bit-wise transferred BOZ at %L"
10478 ". This check can be disabled with the option "
10479 "%<-fno-range-check%>", &rhs
->where
);
10484 if (lhs
->ts
.type
== BT_CHARACTER
10485 && warn_character_truncation
)
10487 HOST_WIDE_INT llen
= 0, rlen
= 0;
10488 if (lhs
->ts
.u
.cl
!= NULL
10489 && lhs
->ts
.u
.cl
->length
!= NULL
10490 && lhs
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
)
10491 llen
= gfc_mpz_get_hwi (lhs
->ts
.u
.cl
->length
->value
.integer
);
10493 if (rhs
->expr_type
== EXPR_CONSTANT
)
10494 rlen
= rhs
->value
.character
.length
;
10496 else if (rhs
->ts
.u
.cl
!= NULL
10497 && rhs
->ts
.u
.cl
->length
!= NULL
10498 && rhs
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
)
10499 rlen
= gfc_mpz_get_hwi (rhs
->ts
.u
.cl
->length
->value
.integer
);
10501 if (rlen
&& llen
&& rlen
> llen
)
10502 gfc_warning_now (OPT_Wcharacter_truncation
,
10503 "CHARACTER expression will be truncated "
10504 "in assignment (%ld/%ld) at %L",
10505 (long) llen
, (long) rlen
, &code
->loc
);
10508 /* Ensure that a vector index expression for the lvalue is evaluated
10509 to a temporary if the lvalue symbol is referenced in it. */
10512 for (ref
= lhs
->ref
; ref
; ref
= ref
->next
)
10513 if (ref
->type
== REF_ARRAY
)
10515 for (n
= 0; n
< ref
->u
.ar
.dimen
; n
++)
10516 if (ref
->u
.ar
.dimen_type
[n
] == DIMEN_VECTOR
10517 && gfc_find_sym_in_expr (lhs
->symtree
->n
.sym
,
10518 ref
->u
.ar
.start
[n
]))
10520 = gfc_get_parentheses (ref
->u
.ar
.start
[n
]);
10524 if (gfc_pure (NULL
))
10526 if (lhs
->ts
.type
== BT_DERIVED
10527 && lhs
->expr_type
== EXPR_VARIABLE
10528 && lhs
->ts
.u
.derived
->attr
.pointer_comp
10529 && rhs
->expr_type
== EXPR_VARIABLE
10530 && (gfc_impure_variable (rhs
->symtree
->n
.sym
)
10531 || gfc_is_coindexed (rhs
)))
10533 /* F2008, C1283. */
10534 if (gfc_is_coindexed (rhs
))
10535 gfc_error ("Coindexed expression at %L is assigned to "
10536 "a derived type variable with a POINTER "
10537 "component in a PURE procedure",
10540 gfc_error ("The impure variable at %L is assigned to "
10541 "a derived type variable with a POINTER "
10542 "component in a PURE procedure (12.6)",
10547 /* Fortran 2008, C1283. */
10548 if (gfc_is_coindexed (lhs
))
10550 gfc_error ("Assignment to coindexed variable at %L in a PURE "
10551 "procedure", &rhs
->where
);
10556 if (gfc_implicit_pure (NULL
))
10558 if (lhs
->expr_type
== EXPR_VARIABLE
10559 && lhs
->symtree
->n
.sym
!= gfc_current_ns
->proc_name
10560 && lhs
->symtree
->n
.sym
->ns
!= gfc_current_ns
)
10561 gfc_unset_implicit_pure (NULL
);
10563 if (lhs
->ts
.type
== BT_DERIVED
10564 && lhs
->expr_type
== EXPR_VARIABLE
10565 && lhs
->ts
.u
.derived
->attr
.pointer_comp
10566 && rhs
->expr_type
== EXPR_VARIABLE
10567 && (gfc_impure_variable (rhs
->symtree
->n
.sym
)
10568 || gfc_is_coindexed (rhs
)))
10569 gfc_unset_implicit_pure (NULL
);
10571 /* Fortran 2008, C1283. */
10572 if (gfc_is_coindexed (lhs
))
10573 gfc_unset_implicit_pure (NULL
);
10576 /* F2008, 7.2.1.2. */
10577 attr
= gfc_expr_attr (lhs
);
10578 if (lhs
->ts
.type
== BT_CLASS
&& attr
.allocatable
)
10580 if (attr
.codimension
)
10582 gfc_error ("Assignment to polymorphic coarray at %L is not "
10583 "permitted", &lhs
->where
);
10586 if (!gfc_notify_std (GFC_STD_F2008
, "Assignment to an allocatable "
10587 "polymorphic variable at %L", &lhs
->where
))
10589 if (!flag_realloc_lhs
)
10591 gfc_error ("Assignment to an allocatable polymorphic variable at %L "
10592 "requires %<-frealloc-lhs%>", &lhs
->where
);
10596 else if (lhs
->ts
.type
== BT_CLASS
)
10598 gfc_error ("Nonallocatable variable must not be polymorphic in intrinsic "
10599 "assignment at %L - check that there is a matching specific "
10600 "subroutine for '=' operator", &lhs
->where
);
10604 bool lhs_coindexed
= gfc_is_coindexed (lhs
);
10606 /* F2008, Section 7.2.1.2. */
10607 if (lhs_coindexed
&& gfc_has_ultimate_allocatable (lhs
))
10609 gfc_error ("Coindexed variable must not have an allocatable ultimate "
10610 "component in assignment at %L", &lhs
->where
);
10614 /* Assign the 'data' of a class object to a derived type. */
10615 if (lhs
->ts
.type
== BT_DERIVED
10616 && rhs
->ts
.type
== BT_CLASS
10617 && rhs
->expr_type
!= EXPR_ARRAY
)
10618 gfc_add_data_component (rhs
);
10620 /* Make sure there is a vtable and, in particular, a _copy for the
10622 if (UNLIMITED_POLY (lhs
) && lhs
->rank
&& rhs
->ts
.type
!= BT_CLASS
)
10623 gfc_find_vtab (&rhs
->ts
);
10625 bool caf_convert_to_send
= flag_coarray
== GFC_FCOARRAY_LIB
10627 || (code
->expr2
->expr_type
== EXPR_FUNCTION
10628 && code
->expr2
->value
.function
.isym
10629 && code
->expr2
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
10630 && (code
->expr1
->rank
== 0 || code
->expr2
->rank
!= 0)
10631 && !gfc_expr_attr (rhs
).allocatable
10632 && !gfc_has_vector_subscript (rhs
)));
10634 gfc_check_assign (lhs
, rhs
, 1, !caf_convert_to_send
);
10636 /* Insert a GFC_ISYM_CAF_SEND intrinsic, when the LHS is a coindexed variable.
10637 Additionally, insert this code when the RHS is a CAF as we then use the
10638 GFC_ISYM_CAF_SEND intrinsic just to avoid a temporary; but do not do so if
10639 the LHS is (re)allocatable or has a vector subscript. If the LHS is a
10640 noncoindexed array and the RHS is a coindexed scalar, use the normal code
10642 if (caf_convert_to_send
)
10644 if (code
->expr2
->expr_type
== EXPR_FUNCTION
10645 && code
->expr2
->value
.function
.isym
10646 && code
->expr2
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
)
10647 remove_caf_get_intrinsic (code
->expr2
);
10648 code
->op
= EXEC_CALL
;
10649 gfc_get_sym_tree (GFC_PREFIX ("caf_send"), ns
, &code
->symtree
, true);
10650 code
->resolved_sym
= code
->symtree
->n
.sym
;
10651 code
->resolved_sym
->attr
.flavor
= FL_PROCEDURE
;
10652 code
->resolved_sym
->attr
.intrinsic
= 1;
10653 code
->resolved_sym
->attr
.subroutine
= 1;
10654 code
->resolved_isym
= gfc_intrinsic_subroutine_by_id (GFC_ISYM_CAF_SEND
);
10655 gfc_commit_symbol (code
->resolved_sym
);
10656 code
->ext
.actual
= gfc_get_actual_arglist ();
10657 code
->ext
.actual
->expr
= lhs
;
10658 code
->ext
.actual
->next
= gfc_get_actual_arglist ();
10659 code
->ext
.actual
->next
->expr
= rhs
;
10660 code
->expr1
= NULL
;
10661 code
->expr2
= NULL
;
10668 /* Add a component reference onto an expression. */
10671 add_comp_ref (gfc_expr
*e
, gfc_component
*c
)
10676 ref
= &((*ref
)->next
);
10677 *ref
= gfc_get_ref ();
10678 (*ref
)->type
= REF_COMPONENT
;
10679 (*ref
)->u
.c
.sym
= e
->ts
.u
.derived
;
10680 (*ref
)->u
.c
.component
= c
;
10683 /* Add a full array ref, as necessary. */
10686 gfc_add_full_array_ref (e
, c
->as
);
10687 e
->rank
= c
->as
->rank
;
10692 /* Build an assignment. Keep the argument 'op' for future use, so that
10693 pointer assignments can be made. */
10696 build_assignment (gfc_exec_op op
, gfc_expr
*expr1
, gfc_expr
*expr2
,
10697 gfc_component
*comp1
, gfc_component
*comp2
, locus loc
)
10699 gfc_code
*this_code
;
10701 this_code
= gfc_get_code (op
);
10702 this_code
->next
= NULL
;
10703 this_code
->expr1
= gfc_copy_expr (expr1
);
10704 this_code
->expr2
= gfc_copy_expr (expr2
);
10705 this_code
->loc
= loc
;
10706 if (comp1
&& comp2
)
10708 add_comp_ref (this_code
->expr1
, comp1
);
10709 add_comp_ref (this_code
->expr2
, comp2
);
10716 /* Makes a temporary variable expression based on the characteristics of
10717 a given variable expression. */
10720 get_temp_from_expr (gfc_expr
*e
, gfc_namespace
*ns
)
10722 static int serial
= 0;
10723 char name
[GFC_MAX_SYMBOL_LEN
];
10725 gfc_array_spec
*as
;
10726 gfc_array_ref
*aref
;
10729 sprintf (name
, GFC_PREFIX("DA%d"), serial
++);
10730 gfc_get_sym_tree (name
, ns
, &tmp
, false);
10731 gfc_add_type (tmp
->n
.sym
, &e
->ts
, NULL
);
10733 if (e
->expr_type
== EXPR_CONSTANT
&& e
->ts
.type
== BT_CHARACTER
)
10734 tmp
->n
.sym
->ts
.u
.cl
->length
= gfc_get_int_expr (gfc_charlen_int_kind
,
10736 e
->value
.character
.length
);
10742 /* Obtain the arrayspec for the temporary. */
10743 if (e
->rank
&& e
->expr_type
!= EXPR_ARRAY
10744 && e
->expr_type
!= EXPR_FUNCTION
10745 && e
->expr_type
!= EXPR_OP
)
10747 aref
= gfc_find_array_ref (e
);
10748 if (e
->expr_type
== EXPR_VARIABLE
10749 && e
->symtree
->n
.sym
->as
== aref
->as
)
10753 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
10754 if (ref
->type
== REF_COMPONENT
10755 && ref
->u
.c
.component
->as
== aref
->as
)
10763 /* Add the attributes and the arrayspec to the temporary. */
10764 tmp
->n
.sym
->attr
= gfc_expr_attr (e
);
10765 tmp
->n
.sym
->attr
.function
= 0;
10766 tmp
->n
.sym
->attr
.result
= 0;
10767 tmp
->n
.sym
->attr
.flavor
= FL_VARIABLE
;
10768 tmp
->n
.sym
->attr
.dummy
= 0;
10769 tmp
->n
.sym
->attr
.intent
= INTENT_UNKNOWN
;
10773 tmp
->n
.sym
->as
= gfc_copy_array_spec (as
);
10776 if (as
->type
== AS_DEFERRED
)
10777 tmp
->n
.sym
->attr
.allocatable
= 1;
10779 else if (e
->rank
&& (e
->expr_type
== EXPR_ARRAY
10780 || e
->expr_type
== EXPR_FUNCTION
10781 || e
->expr_type
== EXPR_OP
))
10783 tmp
->n
.sym
->as
= gfc_get_array_spec ();
10784 tmp
->n
.sym
->as
->type
= AS_DEFERRED
;
10785 tmp
->n
.sym
->as
->rank
= e
->rank
;
10786 tmp
->n
.sym
->attr
.allocatable
= 1;
10787 tmp
->n
.sym
->attr
.dimension
= 1;
10790 tmp
->n
.sym
->attr
.dimension
= 0;
10792 gfc_set_sym_referenced (tmp
->n
.sym
);
10793 gfc_commit_symbol (tmp
->n
.sym
);
10794 e
= gfc_lval_expr_from_sym (tmp
->n
.sym
);
10796 /* Should the lhs be a section, use its array ref for the
10797 temporary expression. */
10798 if (aref
&& aref
->type
!= AR_FULL
)
10800 gfc_free_ref_list (e
->ref
);
10801 e
->ref
= gfc_copy_ref (ref
);
10807 /* Add one line of code to the code chain, making sure that 'head' and
10808 'tail' are appropriately updated. */
10811 add_code_to_chain (gfc_code
**this_code
, gfc_code
**head
, gfc_code
**tail
)
10813 gcc_assert (this_code
);
10815 *head
= *tail
= *this_code
;
10817 *tail
= gfc_append_code (*tail
, *this_code
);
10822 /* Counts the potential number of part array references that would
10823 result from resolution of typebound defined assignments. */
10826 nonscalar_typebound_assign (gfc_symbol
*derived
, int depth
)
10829 int c_depth
= 0, t_depth
;
10831 for (c
= derived
->components
; c
; c
= c
->next
)
10833 if ((!gfc_bt_struct (c
->ts
.type
)
10835 || c
->attr
.allocatable
10836 || c
->attr
.proc_pointer_comp
10837 || c
->attr
.class_pointer
10838 || c
->attr
.proc_pointer
)
10839 && !c
->attr
.defined_assign_comp
)
10842 if (c
->as
&& c_depth
== 0)
10845 if (c
->ts
.u
.derived
->attr
.defined_assign_comp
)
10846 t_depth
= nonscalar_typebound_assign (c
->ts
.u
.derived
,
10851 c_depth
= t_depth
> c_depth
? t_depth
: c_depth
;
10853 return depth
+ c_depth
;
10857 /* Implement 7.2.1.3 of the F08 standard:
10858 "An intrinsic assignment where the variable is of derived type is
10859 performed as if each component of the variable were assigned from the
10860 corresponding component of expr using pointer assignment (7.2.2) for
10861 each pointer component, defined assignment for each nonpointer
10862 nonallocatable component of a type that has a type-bound defined
10863 assignment consistent with the component, intrinsic assignment for
10864 each other nonpointer nonallocatable component, ..."
10866 The pointer assignments are taken care of by the intrinsic
10867 assignment of the structure itself. This function recursively adds
10868 defined assignments where required. The recursion is accomplished
10869 by calling gfc_resolve_code.
10871 When the lhs in a defined assignment has intent INOUT, we need a
10872 temporary for the lhs. In pseudo-code:
10874 ! Only call function lhs once.
10875 if (lhs is not a constant or an variable)
10878 ! Do the intrinsic assignment
10880 ! Now do the defined assignments
10881 do over components with typebound defined assignment [%cmp]
10882 #if one component's assignment procedure is INOUT
10884 #if expr2 non-variable
10890 t1%cmp {defined=} expr2%cmp
10896 expr1%cmp {defined=} expr2%cmp
10900 /* The temporary assignments have to be put on top of the additional
10901 code to avoid the result being changed by the intrinsic assignment.
10903 static int component_assignment_level
= 0;
10904 static gfc_code
*tmp_head
= NULL
, *tmp_tail
= NULL
;
10907 generate_component_assignments (gfc_code
**code
, gfc_namespace
*ns
)
10909 gfc_component
*comp1
, *comp2
;
10910 gfc_code
*this_code
= NULL
, *head
= NULL
, *tail
= NULL
;
10912 int error_count
, depth
;
10914 gfc_get_errors (NULL
, &error_count
);
10916 /* Filter out continuing processing after an error. */
10918 || (*code
)->expr1
->ts
.type
!= BT_DERIVED
10919 || (*code
)->expr2
->ts
.type
!= BT_DERIVED
)
10922 /* TODO: Handle more than one part array reference in assignments. */
10923 depth
= nonscalar_typebound_assign ((*code
)->expr1
->ts
.u
.derived
,
10924 (*code
)->expr1
->rank
? 1 : 0);
10927 gfc_warning (0, "TODO: type-bound defined assignment(s) at %L not "
10928 "done because multiple part array references would "
10929 "occur in intermediate expressions.", &(*code
)->loc
);
10933 component_assignment_level
++;
10935 /* Create a temporary so that functions get called only once. */
10936 if ((*code
)->expr2
->expr_type
!= EXPR_VARIABLE
10937 && (*code
)->expr2
->expr_type
!= EXPR_CONSTANT
)
10939 gfc_expr
*tmp_expr
;
10941 /* Assign the rhs to the temporary. */
10942 tmp_expr
= get_temp_from_expr ((*code
)->expr1
, ns
);
10943 this_code
= build_assignment (EXEC_ASSIGN
,
10944 tmp_expr
, (*code
)->expr2
,
10945 NULL
, NULL
, (*code
)->loc
);
10946 /* Add the code and substitute the rhs expression. */
10947 add_code_to_chain (&this_code
, &tmp_head
, &tmp_tail
);
10948 gfc_free_expr ((*code
)->expr2
);
10949 (*code
)->expr2
= tmp_expr
;
10952 /* Do the intrinsic assignment. This is not needed if the lhs is one
10953 of the temporaries generated here, since the intrinsic assignment
10954 to the final result already does this. */
10955 if ((*code
)->expr1
->symtree
->n
.sym
->name
[2] != '@')
10957 this_code
= build_assignment (EXEC_ASSIGN
,
10958 (*code
)->expr1
, (*code
)->expr2
,
10959 NULL
, NULL
, (*code
)->loc
);
10960 add_code_to_chain (&this_code
, &head
, &tail
);
10963 comp1
= (*code
)->expr1
->ts
.u
.derived
->components
;
10964 comp2
= (*code
)->expr2
->ts
.u
.derived
->components
;
10967 for (; comp1
; comp1
= comp1
->next
, comp2
= comp2
->next
)
10969 bool inout
= false;
10971 /* The intrinsic assignment does the right thing for pointers
10972 of all kinds and allocatable components. */
10973 if (!gfc_bt_struct (comp1
->ts
.type
)
10974 || comp1
->attr
.pointer
10975 || comp1
->attr
.allocatable
10976 || comp1
->attr
.proc_pointer_comp
10977 || comp1
->attr
.class_pointer
10978 || comp1
->attr
.proc_pointer
)
10981 /* Make an assigment for this component. */
10982 this_code
= build_assignment (EXEC_ASSIGN
,
10983 (*code
)->expr1
, (*code
)->expr2
,
10984 comp1
, comp2
, (*code
)->loc
);
10986 /* Convert the assignment if there is a defined assignment for
10987 this type. Otherwise, using the call from gfc_resolve_code,
10988 recurse into its components. */
10989 gfc_resolve_code (this_code
, ns
);
10991 if (this_code
->op
== EXEC_ASSIGN_CALL
)
10993 gfc_formal_arglist
*dummy_args
;
10995 /* Check that there is a typebound defined assignment. If not,
10996 then this must be a module defined assignment. We cannot
10997 use the defined_assign_comp attribute here because it must
10998 be this derived type that has the defined assignment and not
11000 if (!(comp1
->ts
.u
.derived
->f2k_derived
11001 && comp1
->ts
.u
.derived
->f2k_derived
11002 ->tb_op
[INTRINSIC_ASSIGN
]))
11004 gfc_free_statements (this_code
);
11009 /* If the first argument of the subroutine has intent INOUT
11010 a temporary must be generated and used instead. */
11011 rsym
= this_code
->resolved_sym
;
11012 dummy_args
= gfc_sym_get_dummy_args (rsym
);
11014 && dummy_args
->sym
->attr
.intent
== INTENT_INOUT
)
11016 gfc_code
*temp_code
;
11019 /* Build the temporary required for the assignment and put
11020 it at the head of the generated code. */
11023 t1
= get_temp_from_expr ((*code
)->expr1
, ns
);
11024 temp_code
= build_assignment (EXEC_ASSIGN
,
11025 t1
, (*code
)->expr1
,
11026 NULL
, NULL
, (*code
)->loc
);
11028 /* For allocatable LHS, check whether it is allocated. Note
11029 that allocatable components with defined assignment are
11030 not yet support. See PR 57696. */
11031 if ((*code
)->expr1
->symtree
->n
.sym
->attr
.allocatable
)
11035 gfc_lval_expr_from_sym ((*code
)->expr1
->symtree
->n
.sym
);
11036 block
= gfc_get_code (EXEC_IF
);
11037 block
->block
= gfc_get_code (EXEC_IF
);
11038 block
->block
->expr1
11039 = gfc_build_intrinsic_call (ns
,
11040 GFC_ISYM_ALLOCATED
, "allocated",
11041 (*code
)->loc
, 1, e
);
11042 block
->block
->next
= temp_code
;
11045 add_code_to_chain (&temp_code
, &tmp_head
, &tmp_tail
);
11048 /* Replace the first actual arg with the component of the
11050 gfc_free_expr (this_code
->ext
.actual
->expr
);
11051 this_code
->ext
.actual
->expr
= gfc_copy_expr (t1
);
11052 add_comp_ref (this_code
->ext
.actual
->expr
, comp1
);
11054 /* If the LHS variable is allocatable and wasn't allocated and
11055 the temporary is allocatable, pointer assign the address of
11056 the freshly allocated LHS to the temporary. */
11057 if ((*code
)->expr1
->symtree
->n
.sym
->attr
.allocatable
11058 && gfc_expr_attr ((*code
)->expr1
).allocatable
)
11063 cond
= gfc_get_expr ();
11064 cond
->ts
.type
= BT_LOGICAL
;
11065 cond
->ts
.kind
= gfc_default_logical_kind
;
11066 cond
->expr_type
= EXPR_OP
;
11067 cond
->where
= (*code
)->loc
;
11068 cond
->value
.op
.op
= INTRINSIC_NOT
;
11069 cond
->value
.op
.op1
= gfc_build_intrinsic_call (ns
,
11070 GFC_ISYM_ALLOCATED
, "allocated",
11071 (*code
)->loc
, 1, gfc_copy_expr (t1
));
11072 block
= gfc_get_code (EXEC_IF
);
11073 block
->block
= gfc_get_code (EXEC_IF
);
11074 block
->block
->expr1
= cond
;
11075 block
->block
->next
= build_assignment (EXEC_POINTER_ASSIGN
,
11076 t1
, (*code
)->expr1
,
11077 NULL
, NULL
, (*code
)->loc
);
11078 add_code_to_chain (&block
, &head
, &tail
);
11082 else if (this_code
->op
== EXEC_ASSIGN
&& !this_code
->next
)
11084 /* Don't add intrinsic assignments since they are already
11085 effected by the intrinsic assignment of the structure. */
11086 gfc_free_statements (this_code
);
11091 add_code_to_chain (&this_code
, &head
, &tail
);
11095 /* Transfer the value to the final result. */
11096 this_code
= build_assignment (EXEC_ASSIGN
,
11097 (*code
)->expr1
, t1
,
11098 comp1
, comp2
, (*code
)->loc
);
11099 add_code_to_chain (&this_code
, &head
, &tail
);
11103 /* Put the temporary assignments at the top of the generated code. */
11104 if (tmp_head
&& component_assignment_level
== 1)
11106 gfc_append_code (tmp_head
, head
);
11108 tmp_head
= tmp_tail
= NULL
;
11111 // If we did a pointer assignment - thus, we need to ensure that the LHS is
11112 // not accidentally deallocated. Hence, nullify t1.
11113 if (t1
&& (*code
)->expr1
->symtree
->n
.sym
->attr
.allocatable
11114 && gfc_expr_attr ((*code
)->expr1
).allocatable
)
11120 e
= gfc_lval_expr_from_sym ((*code
)->expr1
->symtree
->n
.sym
);
11121 cond
= gfc_build_intrinsic_call (ns
, GFC_ISYM_ASSOCIATED
, "associated",
11122 (*code
)->loc
, 2, gfc_copy_expr (t1
), e
);
11123 block
= gfc_get_code (EXEC_IF
);
11124 block
->block
= gfc_get_code (EXEC_IF
);
11125 block
->block
->expr1
= cond
;
11126 block
->block
->next
= build_assignment (EXEC_POINTER_ASSIGN
,
11127 t1
, gfc_get_null_expr (&(*code
)->loc
),
11128 NULL
, NULL
, (*code
)->loc
);
11129 gfc_append_code (tail
, block
);
11133 /* Now attach the remaining code chain to the input code. Step on
11134 to the end of the new code since resolution is complete. */
11135 gcc_assert ((*code
)->op
== EXEC_ASSIGN
);
11136 tail
->next
= (*code
)->next
;
11137 /* Overwrite 'code' because this would place the intrinsic assignment
11138 before the temporary for the lhs is created. */
11139 gfc_free_expr ((*code
)->expr1
);
11140 gfc_free_expr ((*code
)->expr2
);
11146 component_assignment_level
--;
11150 /* F2008: Pointer function assignments are of the form:
11151 ptr_fcn (args) = expr
11152 This function breaks these assignments into two statements:
11153 temporary_pointer => ptr_fcn(args)
11154 temporary_pointer = expr */
11157 resolve_ptr_fcn_assign (gfc_code
**code
, gfc_namespace
*ns
)
11159 gfc_expr
*tmp_ptr_expr
;
11160 gfc_code
*this_code
;
11161 gfc_component
*comp
;
11164 if ((*code
)->expr1
->expr_type
!= EXPR_FUNCTION
)
11167 /* Even if standard does not support this feature, continue to build
11168 the two statements to avoid upsetting frontend_passes.c. */
11169 gfc_notify_std (GFC_STD_F2008
, "Pointer procedure assignment at "
11170 "%L", &(*code
)->loc
);
11172 comp
= gfc_get_proc_ptr_comp ((*code
)->expr1
);
11175 s
= comp
->ts
.interface
;
11177 s
= (*code
)->expr1
->symtree
->n
.sym
;
11179 if (s
== NULL
|| !s
->result
->attr
.pointer
)
11181 gfc_error ("The function result on the lhs of the assignment at "
11182 "%L must have the pointer attribute.",
11183 &(*code
)->expr1
->where
);
11184 (*code
)->op
= EXEC_NOP
;
11188 tmp_ptr_expr
= get_temp_from_expr ((*code
)->expr2
, ns
);
11190 /* get_temp_from_expression is set up for ordinary assignments. To that
11191 end, where array bounds are not known, arrays are made allocatable.
11192 Change the temporary to a pointer here. */
11193 tmp_ptr_expr
->symtree
->n
.sym
->attr
.pointer
= 1;
11194 tmp_ptr_expr
->symtree
->n
.sym
->attr
.allocatable
= 0;
11195 tmp_ptr_expr
->where
= (*code
)->loc
;
11197 this_code
= build_assignment (EXEC_ASSIGN
,
11198 tmp_ptr_expr
, (*code
)->expr2
,
11199 NULL
, NULL
, (*code
)->loc
);
11200 this_code
->next
= (*code
)->next
;
11201 (*code
)->next
= this_code
;
11202 (*code
)->op
= EXEC_POINTER_ASSIGN
;
11203 (*code
)->expr2
= (*code
)->expr1
;
11204 (*code
)->expr1
= tmp_ptr_expr
;
11210 /* Deferred character length assignments from an operator expression
11211 require a temporary because the character length of the lhs can
11212 change in the course of the assignment. */
11215 deferred_op_assign (gfc_code
**code
, gfc_namespace
*ns
)
11217 gfc_expr
*tmp_expr
;
11218 gfc_code
*this_code
;
11220 if (!((*code
)->expr1
->ts
.type
== BT_CHARACTER
11221 && (*code
)->expr1
->ts
.deferred
&& (*code
)->expr1
->rank
11222 && (*code
)->expr2
->expr_type
== EXPR_OP
))
11225 if (!gfc_check_dependency ((*code
)->expr1
, (*code
)->expr2
, 1))
11228 if (gfc_expr_attr ((*code
)->expr1
).pointer
)
11231 tmp_expr
= get_temp_from_expr ((*code
)->expr1
, ns
);
11232 tmp_expr
->where
= (*code
)->loc
;
11234 /* A new charlen is required to ensure that the variable string
11235 length is different to that of the original lhs. */
11236 tmp_expr
->ts
.u
.cl
= gfc_get_charlen();
11237 tmp_expr
->symtree
->n
.sym
->ts
.u
.cl
= tmp_expr
->ts
.u
.cl
;
11238 tmp_expr
->ts
.u
.cl
->next
= (*code
)->expr2
->ts
.u
.cl
->next
;
11239 (*code
)->expr2
->ts
.u
.cl
->next
= tmp_expr
->ts
.u
.cl
;
11241 tmp_expr
->symtree
->n
.sym
->ts
.deferred
= 1;
11243 this_code
= build_assignment (EXEC_ASSIGN
,
11245 gfc_copy_expr (tmp_expr
),
11246 NULL
, NULL
, (*code
)->loc
);
11248 (*code
)->expr1
= tmp_expr
;
11250 this_code
->next
= (*code
)->next
;
11251 (*code
)->next
= this_code
;
11257 /* Given a block of code, recursively resolve everything pointed to by this
11261 gfc_resolve_code (gfc_code
*code
, gfc_namespace
*ns
)
11263 int omp_workshare_save
;
11264 int forall_save
, do_concurrent_save
;
11268 frame
.prev
= cs_base
;
11272 find_reachable_labels (code
);
11274 for (; code
; code
= code
->next
)
11276 frame
.current
= code
;
11277 forall_save
= forall_flag
;
11278 do_concurrent_save
= gfc_do_concurrent_flag
;
11280 if (code
->op
== EXEC_FORALL
)
11283 gfc_resolve_forall (code
, ns
, forall_save
);
11286 else if (code
->block
)
11288 omp_workshare_save
= -1;
11291 case EXEC_OACC_PARALLEL_LOOP
:
11292 case EXEC_OACC_PARALLEL
:
11293 case EXEC_OACC_KERNELS_LOOP
:
11294 case EXEC_OACC_KERNELS
:
11295 case EXEC_OACC_DATA
:
11296 case EXEC_OACC_HOST_DATA
:
11297 case EXEC_OACC_LOOP
:
11298 gfc_resolve_oacc_blocks (code
, ns
);
11300 case EXEC_OMP_PARALLEL_WORKSHARE
:
11301 omp_workshare_save
= omp_workshare_flag
;
11302 omp_workshare_flag
= 1;
11303 gfc_resolve_omp_parallel_blocks (code
, ns
);
11305 case EXEC_OMP_PARALLEL
:
11306 case EXEC_OMP_PARALLEL_DO
:
11307 case EXEC_OMP_PARALLEL_DO_SIMD
:
11308 case EXEC_OMP_PARALLEL_SECTIONS
:
11309 case EXEC_OMP_TARGET_PARALLEL
:
11310 case EXEC_OMP_TARGET_PARALLEL_DO
:
11311 case EXEC_OMP_TARGET_PARALLEL_DO_SIMD
:
11312 case EXEC_OMP_TARGET_TEAMS
:
11313 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE
:
11314 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO
:
11315 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
11316 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_SIMD
:
11317 case EXEC_OMP_TASK
:
11318 case EXEC_OMP_TASKLOOP
:
11319 case EXEC_OMP_TASKLOOP_SIMD
:
11320 case EXEC_OMP_TEAMS
:
11321 case EXEC_OMP_TEAMS_DISTRIBUTE
:
11322 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO
:
11323 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
11324 case EXEC_OMP_TEAMS_DISTRIBUTE_SIMD
:
11325 omp_workshare_save
= omp_workshare_flag
;
11326 omp_workshare_flag
= 0;
11327 gfc_resolve_omp_parallel_blocks (code
, ns
);
11329 case EXEC_OMP_DISTRIBUTE
:
11330 case EXEC_OMP_DISTRIBUTE_SIMD
:
11332 case EXEC_OMP_DO_SIMD
:
11333 case EXEC_OMP_SIMD
:
11334 case EXEC_OMP_TARGET_SIMD
:
11335 gfc_resolve_omp_do_blocks (code
, ns
);
11337 case EXEC_SELECT_TYPE
:
11338 /* Blocks are handled in resolve_select_type because we have
11339 to transform the SELECT TYPE into ASSOCIATE first. */
11341 case EXEC_DO_CONCURRENT
:
11342 gfc_do_concurrent_flag
= 1;
11343 gfc_resolve_blocks (code
->block
, ns
);
11344 gfc_do_concurrent_flag
= 2;
11346 case EXEC_OMP_WORKSHARE
:
11347 omp_workshare_save
= omp_workshare_flag
;
11348 omp_workshare_flag
= 1;
11351 gfc_resolve_blocks (code
->block
, ns
);
11355 if (omp_workshare_save
!= -1)
11356 omp_workshare_flag
= omp_workshare_save
;
11360 if (code
->op
!= EXEC_COMPCALL
&& code
->op
!= EXEC_CALL_PPC
)
11361 t
= gfc_resolve_expr (code
->expr1
);
11362 forall_flag
= forall_save
;
11363 gfc_do_concurrent_flag
= do_concurrent_save
;
11365 if (!gfc_resolve_expr (code
->expr2
))
11368 if (code
->op
== EXEC_ALLOCATE
11369 && !gfc_resolve_expr (code
->expr3
))
11375 case EXEC_END_BLOCK
:
11376 case EXEC_END_NESTED_BLOCK
:
11380 case EXEC_ERROR_STOP
:
11382 case EXEC_CONTINUE
:
11384 case EXEC_ASSIGN_CALL
:
11387 case EXEC_CRITICAL
:
11388 resolve_critical (code
);
11391 case EXEC_SYNC_ALL
:
11392 case EXEC_SYNC_IMAGES
:
11393 case EXEC_SYNC_MEMORY
:
11394 resolve_sync (code
);
11399 case EXEC_EVENT_POST
:
11400 case EXEC_EVENT_WAIT
:
11401 resolve_lock_unlock_event (code
);
11404 case EXEC_FAIL_IMAGE
:
11405 case EXEC_FORM_TEAM
:
11406 case EXEC_CHANGE_TEAM
:
11407 case EXEC_END_TEAM
:
11408 case EXEC_SYNC_TEAM
:
11412 /* Keep track of which entry we are up to. */
11413 current_entry_id
= code
->ext
.entry
->id
;
11417 resolve_where (code
, NULL
);
11421 if (code
->expr1
!= NULL
)
11423 if (code
->expr1
->ts
.type
!= BT_INTEGER
)
11424 gfc_error ("ASSIGNED GOTO statement at %L requires an "
11425 "INTEGER variable", &code
->expr1
->where
);
11426 else if (code
->expr1
->symtree
->n
.sym
->attr
.assign
!= 1)
11427 gfc_error ("Variable %qs has not been assigned a target "
11428 "label at %L", code
->expr1
->symtree
->n
.sym
->name
,
11429 &code
->expr1
->where
);
11432 resolve_branch (code
->label1
, code
);
11436 if (code
->expr1
!= NULL
11437 && (code
->expr1
->ts
.type
!= BT_INTEGER
|| code
->expr1
->rank
))
11438 gfc_error ("Alternate RETURN statement at %L requires a SCALAR-"
11439 "INTEGER return specifier", &code
->expr1
->where
);
11442 case EXEC_INIT_ASSIGN
:
11443 case EXEC_END_PROCEDURE
:
11450 /* Remove a GFC_ISYM_CAF_GET inserted for a coindexed variable on
11452 if (code
->expr1
->expr_type
== EXPR_FUNCTION
11453 && code
->expr1
->value
.function
.isym
11454 && code
->expr1
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
)
11455 remove_caf_get_intrinsic (code
->expr1
);
11457 /* If this is a pointer function in an lvalue variable context,
11458 the new code will have to be resolved afresh. This is also the
11459 case with an error, where the code is transformed into NOP to
11460 prevent ICEs downstream. */
11461 if (resolve_ptr_fcn_assign (&code
, ns
)
11462 || code
->op
== EXEC_NOP
)
11465 if (!gfc_check_vardef_context (code
->expr1
, false, false, false,
11469 if (resolve_ordinary_assign (code
, ns
))
11471 if (code
->op
== EXEC_COMPCALL
)
11477 /* Check for dependencies in deferred character length array
11478 assignments and generate a temporary, if necessary. */
11479 if (code
->op
== EXEC_ASSIGN
&& deferred_op_assign (&code
, ns
))
11482 /* F03 7.4.1.3 for non-allocatable, non-pointer components. */
11483 if (code
->op
!= EXEC_CALL
&& code
->expr1
->ts
.type
== BT_DERIVED
11484 && code
->expr1
->ts
.u
.derived
11485 && code
->expr1
->ts
.u
.derived
->attr
.defined_assign_comp
)
11486 generate_component_assignments (&code
, ns
);
11490 case EXEC_LABEL_ASSIGN
:
11491 if (code
->label1
->defined
== ST_LABEL_UNKNOWN
)
11492 gfc_error ("Label %d referenced at %L is never defined",
11493 code
->label1
->value
, &code
->label1
->where
);
11495 && (code
->expr1
->expr_type
!= EXPR_VARIABLE
11496 || code
->expr1
->symtree
->n
.sym
->ts
.type
!= BT_INTEGER
11497 || code
->expr1
->symtree
->n
.sym
->ts
.kind
11498 != gfc_default_integer_kind
11499 || code
->expr1
->symtree
->n
.sym
->as
!= NULL
))
11500 gfc_error ("ASSIGN statement at %L requires a scalar "
11501 "default INTEGER variable", &code
->expr1
->where
);
11504 case EXEC_POINTER_ASSIGN
:
11511 /* This is both a variable definition and pointer assignment
11512 context, so check both of them. For rank remapping, a final
11513 array ref may be present on the LHS and fool gfc_expr_attr
11514 used in gfc_check_vardef_context. Remove it. */
11515 e
= remove_last_array_ref (code
->expr1
);
11516 t
= gfc_check_vardef_context (e
, true, false, false,
11517 _("pointer assignment"));
11519 t
= gfc_check_vardef_context (e
, false, false, false,
11520 _("pointer assignment"));
11523 t
= gfc_check_pointer_assign (code
->expr1
, code
->expr2
, !t
) && t
;
11528 /* Assigning a class object always is a regular assign. */
11529 if (code
->expr2
->ts
.type
== BT_CLASS
11530 && code
->expr1
->ts
.type
== BT_CLASS
11531 && !CLASS_DATA (code
->expr2
)->attr
.dimension
11532 && !(gfc_expr_attr (code
->expr1
).proc_pointer
11533 && code
->expr2
->expr_type
== EXPR_VARIABLE
11534 && code
->expr2
->symtree
->n
.sym
->attr
.flavor
11536 code
->op
= EXEC_ASSIGN
;
11540 case EXEC_ARITHMETIC_IF
:
11542 gfc_expr
*e
= code
->expr1
;
11544 gfc_resolve_expr (e
);
11545 if (e
->expr_type
== EXPR_NULL
)
11546 gfc_error ("Invalid NULL at %L", &e
->where
);
11548 if (t
&& (e
->rank
> 0
11549 || !(e
->ts
.type
== BT_REAL
|| e
->ts
.type
== BT_INTEGER
)))
11550 gfc_error ("Arithmetic IF statement at %L requires a scalar "
11551 "REAL or INTEGER expression", &e
->where
);
11553 resolve_branch (code
->label1
, code
);
11554 resolve_branch (code
->label2
, code
);
11555 resolve_branch (code
->label3
, code
);
11560 if (t
&& code
->expr1
!= NULL
11561 && (code
->expr1
->ts
.type
!= BT_LOGICAL
11562 || code
->expr1
->rank
!= 0))
11563 gfc_error ("IF clause at %L requires a scalar LOGICAL expression",
11564 &code
->expr1
->where
);
11569 resolve_call (code
);
11572 case EXEC_COMPCALL
:
11574 resolve_typebound_subroutine (code
);
11577 case EXEC_CALL_PPC
:
11578 resolve_ppc_call (code
);
11582 /* Select is complicated. Also, a SELECT construct could be
11583 a transformed computed GOTO. */
11584 resolve_select (code
, false);
11587 case EXEC_SELECT_TYPE
:
11588 resolve_select_type (code
, ns
);
11592 resolve_block_construct (code
);
11596 if (code
->ext
.iterator
!= NULL
)
11598 gfc_iterator
*iter
= code
->ext
.iterator
;
11599 if (gfc_resolve_iterator (iter
, true, false))
11600 gfc_resolve_do_iterator (code
, iter
->var
->symtree
->n
.sym
,
11605 case EXEC_DO_WHILE
:
11606 if (code
->expr1
== NULL
)
11607 gfc_internal_error ("gfc_resolve_code(): No expression on "
11610 && (code
->expr1
->rank
!= 0
11611 || code
->expr1
->ts
.type
!= BT_LOGICAL
))
11612 gfc_error ("Exit condition of DO WHILE loop at %L must be "
11613 "a scalar LOGICAL expression", &code
->expr1
->where
);
11616 case EXEC_ALLOCATE
:
11618 resolve_allocate_deallocate (code
, "ALLOCATE");
11622 case EXEC_DEALLOCATE
:
11624 resolve_allocate_deallocate (code
, "DEALLOCATE");
11629 if (!gfc_resolve_open (code
->ext
.open
))
11632 resolve_branch (code
->ext
.open
->err
, code
);
11636 if (!gfc_resolve_close (code
->ext
.close
))
11639 resolve_branch (code
->ext
.close
->err
, code
);
11642 case EXEC_BACKSPACE
:
11646 if (!gfc_resolve_filepos (code
->ext
.filepos
, &code
->loc
))
11649 resolve_branch (code
->ext
.filepos
->err
, code
);
11653 if (!gfc_resolve_inquire (code
->ext
.inquire
))
11656 resolve_branch (code
->ext
.inquire
->err
, code
);
11659 case EXEC_IOLENGTH
:
11660 gcc_assert (code
->ext
.inquire
!= NULL
);
11661 if (!gfc_resolve_inquire (code
->ext
.inquire
))
11664 resolve_branch (code
->ext
.inquire
->err
, code
);
11668 if (!gfc_resolve_wait (code
->ext
.wait
))
11671 resolve_branch (code
->ext
.wait
->err
, code
);
11672 resolve_branch (code
->ext
.wait
->end
, code
);
11673 resolve_branch (code
->ext
.wait
->eor
, code
);
11678 if (!gfc_resolve_dt (code
->ext
.dt
, &code
->loc
))
11681 resolve_branch (code
->ext
.dt
->err
, code
);
11682 resolve_branch (code
->ext
.dt
->end
, code
);
11683 resolve_branch (code
->ext
.dt
->eor
, code
);
11686 case EXEC_TRANSFER
:
11687 resolve_transfer (code
);
11690 case EXEC_DO_CONCURRENT
:
11692 resolve_forall_iterators (code
->ext
.forall_iterator
);
11694 if (code
->expr1
!= NULL
11695 && (code
->expr1
->ts
.type
!= BT_LOGICAL
|| code
->expr1
->rank
))
11696 gfc_error ("FORALL mask clause at %L requires a scalar LOGICAL "
11697 "expression", &code
->expr1
->where
);
11700 case EXEC_OACC_PARALLEL_LOOP
:
11701 case EXEC_OACC_PARALLEL
:
11702 case EXEC_OACC_KERNELS_LOOP
:
11703 case EXEC_OACC_KERNELS
:
11704 case EXEC_OACC_DATA
:
11705 case EXEC_OACC_HOST_DATA
:
11706 case EXEC_OACC_LOOP
:
11707 case EXEC_OACC_UPDATE
:
11708 case EXEC_OACC_WAIT
:
11709 case EXEC_OACC_CACHE
:
11710 case EXEC_OACC_ENTER_DATA
:
11711 case EXEC_OACC_EXIT_DATA
:
11712 case EXEC_OACC_ATOMIC
:
11713 case EXEC_OACC_DECLARE
:
11714 gfc_resolve_oacc_directive (code
, ns
);
11717 case EXEC_OMP_ATOMIC
:
11718 case EXEC_OMP_BARRIER
:
11719 case EXEC_OMP_CANCEL
:
11720 case EXEC_OMP_CANCELLATION_POINT
:
11721 case EXEC_OMP_CRITICAL
:
11722 case EXEC_OMP_FLUSH
:
11723 case EXEC_OMP_DISTRIBUTE
:
11724 case EXEC_OMP_DISTRIBUTE_PARALLEL_DO
:
11725 case EXEC_OMP_DISTRIBUTE_PARALLEL_DO_SIMD
:
11726 case EXEC_OMP_DISTRIBUTE_SIMD
:
11728 case EXEC_OMP_DO_SIMD
:
11729 case EXEC_OMP_MASTER
:
11730 case EXEC_OMP_ORDERED
:
11731 case EXEC_OMP_SECTIONS
:
11732 case EXEC_OMP_SIMD
:
11733 case EXEC_OMP_SINGLE
:
11734 case EXEC_OMP_TARGET
:
11735 case EXEC_OMP_TARGET_DATA
:
11736 case EXEC_OMP_TARGET_ENTER_DATA
:
11737 case EXEC_OMP_TARGET_EXIT_DATA
:
11738 case EXEC_OMP_TARGET_PARALLEL
:
11739 case EXEC_OMP_TARGET_PARALLEL_DO
:
11740 case EXEC_OMP_TARGET_PARALLEL_DO_SIMD
:
11741 case EXEC_OMP_TARGET_SIMD
:
11742 case EXEC_OMP_TARGET_TEAMS
:
11743 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE
:
11744 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO
:
11745 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
11746 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_SIMD
:
11747 case EXEC_OMP_TARGET_UPDATE
:
11748 case EXEC_OMP_TASK
:
11749 case EXEC_OMP_TASKGROUP
:
11750 case EXEC_OMP_TASKLOOP
:
11751 case EXEC_OMP_TASKLOOP_SIMD
:
11752 case EXEC_OMP_TASKWAIT
:
11753 case EXEC_OMP_TASKYIELD
:
11754 case EXEC_OMP_TEAMS
:
11755 case EXEC_OMP_TEAMS_DISTRIBUTE
:
11756 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO
:
11757 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
11758 case EXEC_OMP_TEAMS_DISTRIBUTE_SIMD
:
11759 case EXEC_OMP_WORKSHARE
:
11760 gfc_resolve_omp_directive (code
, ns
);
11763 case EXEC_OMP_PARALLEL
:
11764 case EXEC_OMP_PARALLEL_DO
:
11765 case EXEC_OMP_PARALLEL_DO_SIMD
:
11766 case EXEC_OMP_PARALLEL_SECTIONS
:
11767 case EXEC_OMP_PARALLEL_WORKSHARE
:
11768 omp_workshare_save
= omp_workshare_flag
;
11769 omp_workshare_flag
= 0;
11770 gfc_resolve_omp_directive (code
, ns
);
11771 omp_workshare_flag
= omp_workshare_save
;
11775 gfc_internal_error ("gfc_resolve_code(): Bad statement code");
11779 cs_base
= frame
.prev
;
11783 /* Resolve initial values and make sure they are compatible with
11787 resolve_values (gfc_symbol
*sym
)
11791 if (sym
->value
== NULL
)
11794 if (sym
->value
->expr_type
== EXPR_STRUCTURE
)
11795 t
= resolve_structure_cons (sym
->value
, 1);
11797 t
= gfc_resolve_expr (sym
->value
);
11802 gfc_check_assign_symbol (sym
, NULL
, sym
->value
);
11806 /* Verify any BIND(C) derived types in the namespace so we can report errors
11807 for them once, rather than for each variable declared of that type. */
11810 resolve_bind_c_derived_types (gfc_symbol
*derived_sym
)
11812 if (derived_sym
!= NULL
&& derived_sym
->attr
.flavor
== FL_DERIVED
11813 && derived_sym
->attr
.is_bind_c
== 1)
11814 verify_bind_c_derived_type (derived_sym
);
11820 /* Check the interfaces of DTIO procedures associated with derived
11821 type 'sym'. These procedures can either have typebound bindings or
11822 can appear in DTIO generic interfaces. */
11825 gfc_verify_DTIO_procedures (gfc_symbol
*sym
)
11827 if (!sym
|| sym
->attr
.flavor
!= FL_DERIVED
)
11830 gfc_check_dtio_interfaces (sym
);
11835 /* Verify that any binding labels used in a given namespace do not collide
11836 with the names or binding labels of any global symbols. Multiple INTERFACE
11837 for the same procedure are permitted. */
11840 gfc_verify_binding_labels (gfc_symbol
*sym
)
11843 const char *module
;
11845 if (!sym
|| !sym
->attr
.is_bind_c
|| sym
->attr
.is_iso_c
11846 || sym
->attr
.flavor
== FL_DERIVED
|| !sym
->binding_label
)
11849 gsym
= gfc_find_case_gsymbol (gfc_gsym_root
, sym
->binding_label
);
11852 module
= sym
->module
;
11853 else if (sym
->ns
&& sym
->ns
->proc_name
11854 && sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
)
11855 module
= sym
->ns
->proc_name
->name
;
11856 else if (sym
->ns
&& sym
->ns
->parent
11857 && sym
->ns
&& sym
->ns
->parent
->proc_name
11858 && sym
->ns
->parent
->proc_name
->attr
.flavor
== FL_MODULE
)
11859 module
= sym
->ns
->parent
->proc_name
->name
;
11865 && (gsym
->type
== GSYM_FUNCTION
|| gsym
->type
== GSYM_SUBROUTINE
)))
11868 gsym
= gfc_get_gsymbol (sym
->binding_label
, true);
11869 gsym
->where
= sym
->declared_at
;
11870 gsym
->sym_name
= sym
->name
;
11871 gsym
->binding_label
= sym
->binding_label
;
11872 gsym
->ns
= sym
->ns
;
11873 gsym
->mod_name
= module
;
11874 if (sym
->attr
.function
)
11875 gsym
->type
= GSYM_FUNCTION
;
11876 else if (sym
->attr
.subroutine
)
11877 gsym
->type
= GSYM_SUBROUTINE
;
11878 /* Mark as variable/procedure as defined, unless its an INTERFACE. */
11879 gsym
->defined
= sym
->attr
.if_source
!= IFSRC_IFBODY
;
11883 if (sym
->attr
.flavor
== FL_VARIABLE
&& gsym
->type
!= GSYM_UNKNOWN
)
11885 gfc_error ("Variable %qs with binding label %qs at %L uses the same global "
11886 "identifier as entity at %L", sym
->name
,
11887 sym
->binding_label
, &sym
->declared_at
, &gsym
->where
);
11888 /* Clear the binding label to prevent checking multiple times. */
11889 sym
->binding_label
= NULL
;
11893 if (sym
->attr
.flavor
== FL_VARIABLE
&& module
11894 && (strcmp (module
, gsym
->mod_name
) != 0
11895 || strcmp (sym
->name
, gsym
->sym_name
) != 0))
11897 /* This can only happen if the variable is defined in a module - if it
11898 isn't the same module, reject it. */
11899 gfc_error ("Variable %qs from module %qs with binding label %qs at %L "
11900 "uses the same global identifier as entity at %L from module %qs",
11901 sym
->name
, module
, sym
->binding_label
,
11902 &sym
->declared_at
, &gsym
->where
, gsym
->mod_name
);
11903 sym
->binding_label
= NULL
;
11907 if ((sym
->attr
.function
|| sym
->attr
.subroutine
)
11908 && ((gsym
->type
!= GSYM_SUBROUTINE
&& gsym
->type
!= GSYM_FUNCTION
)
11909 || (gsym
->defined
&& sym
->attr
.if_source
!= IFSRC_IFBODY
))
11910 && (sym
!= gsym
->ns
->proc_name
&& sym
->attr
.entry
== 0)
11911 && (module
!= gsym
->mod_name
11912 || strcmp (gsym
->sym_name
, sym
->name
) != 0
11913 || (module
&& strcmp (module
, gsym
->mod_name
) != 0)))
11915 /* Print an error if the procedure is defined multiple times; we have to
11916 exclude references to the same procedure via module association or
11917 multiple checks for the same procedure. */
11918 gfc_error ("Procedure %qs with binding label %qs at %L uses the same "
11919 "global identifier as entity at %L", sym
->name
,
11920 sym
->binding_label
, &sym
->declared_at
, &gsym
->where
);
11921 sym
->binding_label
= NULL
;
11926 /* Resolve an index expression. */
11929 resolve_index_expr (gfc_expr
*e
)
11931 if (!gfc_resolve_expr (e
))
11934 if (!gfc_simplify_expr (e
, 0))
11937 if (!gfc_specification_expr (e
))
11944 /* Resolve a charlen structure. */
11947 resolve_charlen (gfc_charlen
*cl
)
11950 bool saved_specification_expr
;
11956 saved_specification_expr
= specification_expr
;
11957 specification_expr
= true;
11959 if (cl
->length_from_typespec
)
11961 if (!gfc_resolve_expr (cl
->length
))
11963 specification_expr
= saved_specification_expr
;
11967 if (!gfc_simplify_expr (cl
->length
, 0))
11969 specification_expr
= saved_specification_expr
;
11973 /* cl->length has been resolved. It should have an integer type. */
11974 if (cl
->length
->ts
.type
!= BT_INTEGER
)
11976 gfc_error ("Scalar INTEGER expression expected at %L",
11977 &cl
->length
->where
);
11983 if (!resolve_index_expr (cl
->length
))
11985 specification_expr
= saved_specification_expr
;
11990 /* F2008, 4.4.3.2: If the character length parameter value evaluates to
11991 a negative value, the length of character entities declared is zero. */
11992 if (cl
->length
&& cl
->length
->expr_type
== EXPR_CONSTANT
11993 && mpz_sgn (cl
->length
->value
.integer
) < 0)
11994 gfc_replace_expr (cl
->length
,
11995 gfc_get_int_expr (gfc_charlen_int_kind
, NULL
, 0));
11997 /* Check that the character length is not too large. */
11998 k
= gfc_validate_kind (BT_INTEGER
, gfc_charlen_int_kind
, false);
11999 if (cl
->length
&& cl
->length
->expr_type
== EXPR_CONSTANT
12000 && cl
->length
->ts
.type
== BT_INTEGER
12001 && mpz_cmp (cl
->length
->value
.integer
, gfc_integer_kinds
[k
].huge
) > 0)
12003 gfc_error ("String length at %L is too large", &cl
->length
->where
);
12004 specification_expr
= saved_specification_expr
;
12008 specification_expr
= saved_specification_expr
;
12013 /* Test for non-constant shape arrays. */
12016 is_non_constant_shape_array (gfc_symbol
*sym
)
12022 not_constant
= false;
12023 if (sym
->as
!= NULL
)
12025 /* Unfortunately, !gfc_is_compile_time_shape hits a legal case that
12026 has not been simplified; parameter array references. Do the
12027 simplification now. */
12028 for (i
= 0; i
< sym
->as
->rank
+ sym
->as
->corank
; i
++)
12030 e
= sym
->as
->lower
[i
];
12031 if (e
&& (!resolve_index_expr(e
)
12032 || !gfc_is_constant_expr (e
)))
12033 not_constant
= true;
12034 e
= sym
->as
->upper
[i
];
12035 if (e
&& (!resolve_index_expr(e
)
12036 || !gfc_is_constant_expr (e
)))
12037 not_constant
= true;
12040 return not_constant
;
12043 /* Given a symbol and an initialization expression, add code to initialize
12044 the symbol to the function entry. */
12046 build_init_assign (gfc_symbol
*sym
, gfc_expr
*init
)
12050 gfc_namespace
*ns
= sym
->ns
;
12052 /* Search for the function namespace if this is a contained
12053 function without an explicit result. */
12054 if (sym
->attr
.function
&& sym
== sym
->result
12055 && sym
->name
!= sym
->ns
->proc_name
->name
)
12057 ns
= ns
->contained
;
12058 for (;ns
; ns
= ns
->sibling
)
12059 if (strcmp (ns
->proc_name
->name
, sym
->name
) == 0)
12065 gfc_free_expr (init
);
12069 /* Build an l-value expression for the result. */
12070 lval
= gfc_lval_expr_from_sym (sym
);
12072 /* Add the code at scope entry. */
12073 init_st
= gfc_get_code (EXEC_INIT_ASSIGN
);
12074 init_st
->next
= ns
->code
;
12075 ns
->code
= init_st
;
12077 /* Assign the default initializer to the l-value. */
12078 init_st
->loc
= sym
->declared_at
;
12079 init_st
->expr1
= lval
;
12080 init_st
->expr2
= init
;
12084 /* Whether or not we can generate a default initializer for a symbol. */
12087 can_generate_init (gfc_symbol
*sym
)
12089 symbol_attribute
*a
;
12094 /* These symbols should never have a default initialization. */
12099 || (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
)
12100 && (CLASS_DATA (sym
)->attr
.class_pointer
12101 || CLASS_DATA (sym
)->attr
.proc_pointer
))
12102 || a
->in_equivalence
12109 || (!a
->referenced
&& !a
->result
)
12110 || (a
->dummy
&& a
->intent
!= INTENT_OUT
)
12111 || (a
->function
&& sym
!= sym
->result
)
12116 /* Assign the default initializer to a derived type variable or result. */
12119 apply_default_init (gfc_symbol
*sym
)
12121 gfc_expr
*init
= NULL
;
12123 if (sym
->attr
.flavor
!= FL_VARIABLE
&& !sym
->attr
.function
)
12126 if (sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
)
12127 init
= gfc_generate_initializer (&sym
->ts
, can_generate_init (sym
));
12129 if (init
== NULL
&& sym
->ts
.type
!= BT_CLASS
)
12132 build_init_assign (sym
, init
);
12133 sym
->attr
.referenced
= 1;
12137 /* Build an initializer for a local. Returns null if the symbol should not have
12138 a default initialization. */
12141 build_default_init_expr (gfc_symbol
*sym
)
12143 /* These symbols should never have a default initialization. */
12144 if (sym
->attr
.allocatable
12145 || sym
->attr
.external
12147 || sym
->attr
.pointer
12148 || sym
->attr
.in_equivalence
12149 || sym
->attr
.in_common
12152 || sym
->attr
.cray_pointee
12153 || sym
->attr
.cray_pointer
12157 /* Get the appropriate init expression. */
12158 return gfc_build_default_init_expr (&sym
->ts
, &sym
->declared_at
);
12161 /* Add an initialization expression to a local variable. */
12163 apply_default_init_local (gfc_symbol
*sym
)
12165 gfc_expr
*init
= NULL
;
12167 /* The symbol should be a variable or a function return value. */
12168 if ((sym
->attr
.flavor
!= FL_VARIABLE
&& !sym
->attr
.function
)
12169 || (sym
->attr
.function
&& sym
->result
!= sym
))
12172 /* Try to build the initializer expression. If we can't initialize
12173 this symbol, then init will be NULL. */
12174 init
= build_default_init_expr (sym
);
12178 /* For saved variables, we don't want to add an initializer at function
12179 entry, so we just add a static initializer. Note that automatic variables
12180 are stack allocated even with -fno-automatic; we have also to exclude
12181 result variable, which are also nonstatic. */
12182 if (!sym
->attr
.automatic
12183 && (sym
->attr
.save
|| sym
->ns
->save_all
12184 || (flag_max_stack_var_size
== 0 && !sym
->attr
.result
12185 && (sym
->ns
->proc_name
&& !sym
->ns
->proc_name
->attr
.recursive
)
12186 && (!sym
->attr
.dimension
|| !is_non_constant_shape_array (sym
)))))
12188 /* Don't clobber an existing initializer! */
12189 gcc_assert (sym
->value
== NULL
);
12194 build_init_assign (sym
, init
);
12198 /* Resolution of common features of flavors variable and procedure. */
12201 resolve_fl_var_and_proc (gfc_symbol
*sym
, int mp_flag
)
12203 gfc_array_spec
*as
;
12205 if (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
)
12206 as
= CLASS_DATA (sym
)->as
;
12210 /* Constraints on deferred shape variable. */
12211 if (as
== NULL
|| as
->type
!= AS_DEFERRED
)
12213 bool pointer
, allocatable
, dimension
;
12215 if (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
)
12217 pointer
= CLASS_DATA (sym
)->attr
.class_pointer
;
12218 allocatable
= CLASS_DATA (sym
)->attr
.allocatable
;
12219 dimension
= CLASS_DATA (sym
)->attr
.dimension
;
12223 pointer
= sym
->attr
.pointer
&& !sym
->attr
.select_type_temporary
;
12224 allocatable
= sym
->attr
.allocatable
;
12225 dimension
= sym
->attr
.dimension
;
12230 if (dimension
&& as
->type
!= AS_ASSUMED_RANK
)
12232 gfc_error ("Allocatable array %qs at %L must have a deferred "
12233 "shape or assumed rank", sym
->name
, &sym
->declared_at
);
12236 else if (!gfc_notify_std (GFC_STD_F2003
, "Scalar object "
12237 "%qs at %L may not be ALLOCATABLE",
12238 sym
->name
, &sym
->declared_at
))
12242 if (pointer
&& dimension
&& as
->type
!= AS_ASSUMED_RANK
)
12244 gfc_error ("Array pointer %qs at %L must have a deferred shape or "
12245 "assumed rank", sym
->name
, &sym
->declared_at
);
12251 if (!mp_flag
&& !sym
->attr
.allocatable
&& !sym
->attr
.pointer
12252 && sym
->ts
.type
!= BT_CLASS
&& !sym
->assoc
)
12254 gfc_error ("Array %qs at %L cannot have a deferred shape",
12255 sym
->name
, &sym
->declared_at
);
12260 /* Constraints on polymorphic variables. */
12261 if (sym
->ts
.type
== BT_CLASS
&& !(sym
->result
&& sym
->result
!= sym
))
12264 if (sym
->attr
.class_ok
12265 && !sym
->attr
.select_type_temporary
12266 && !UNLIMITED_POLY (sym
)
12267 && !gfc_type_is_extensible (CLASS_DATA (sym
)->ts
.u
.derived
))
12269 gfc_error ("Type %qs of CLASS variable %qs at %L is not extensible",
12270 CLASS_DATA (sym
)->ts
.u
.derived
->name
, sym
->name
,
12271 &sym
->declared_at
);
12276 /* Assume that use associated symbols were checked in the module ns.
12277 Class-variables that are associate-names are also something special
12278 and excepted from the test. */
12279 if (!sym
->attr
.class_ok
&& !sym
->attr
.use_assoc
&& !sym
->assoc
)
12281 gfc_error ("CLASS variable %qs at %L must be dummy, allocatable "
12282 "or pointer", sym
->name
, &sym
->declared_at
);
12291 /* Additional checks for symbols with flavor variable and derived
12292 type. To be called from resolve_fl_variable. */
12295 resolve_fl_variable_derived (gfc_symbol
*sym
, int no_init_flag
)
12297 gcc_assert (sym
->ts
.type
== BT_DERIVED
|| sym
->ts
.type
== BT_CLASS
);
12299 /* Check to see if a derived type is blocked from being host
12300 associated by the presence of another class I symbol in the same
12301 namespace. 14.6.1.3 of the standard and the discussion on
12302 comp.lang.fortran. */
12303 if (sym
->ns
!= sym
->ts
.u
.derived
->ns
12304 && !sym
->ts
.u
.derived
->attr
.use_assoc
12305 && sym
->ns
->proc_name
->attr
.if_source
!= IFSRC_IFBODY
)
12308 gfc_find_symbol (sym
->ts
.u
.derived
->name
, sym
->ns
, 0, &s
);
12309 if (s
&& s
->attr
.generic
)
12310 s
= gfc_find_dt_in_generic (s
);
12311 if (s
&& !gfc_fl_struct (s
->attr
.flavor
))
12313 gfc_error ("The type %qs cannot be host associated at %L "
12314 "because it is blocked by an incompatible object "
12315 "of the same name declared at %L",
12316 sym
->ts
.u
.derived
->name
, &sym
->declared_at
,
12322 /* 4th constraint in section 11.3: "If an object of a type for which
12323 component-initialization is specified (R429) appears in the
12324 specification-part of a module and does not have the ALLOCATABLE
12325 or POINTER attribute, the object shall have the SAVE attribute."
12327 The check for initializers is performed with
12328 gfc_has_default_initializer because gfc_default_initializer generates
12329 a hidden default for allocatable components. */
12330 if (!(sym
->value
|| no_init_flag
) && sym
->ns
->proc_name
12331 && sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
12332 && !(sym
->ns
->save_all
&& !sym
->attr
.automatic
) && !sym
->attr
.save
12333 && !sym
->attr
.pointer
&& !sym
->attr
.allocatable
12334 && gfc_has_default_initializer (sym
->ts
.u
.derived
)
12335 && !gfc_notify_std (GFC_STD_F2008
, "Implied SAVE for module variable "
12336 "%qs at %L, needed due to the default "
12337 "initialization", sym
->name
, &sym
->declared_at
))
12340 /* Assign default initializer. */
12341 if (!(sym
->value
|| sym
->attr
.pointer
|| sym
->attr
.allocatable
)
12342 && (!no_init_flag
|| sym
->attr
.intent
== INTENT_OUT
))
12343 sym
->value
= gfc_generate_initializer (&sym
->ts
, can_generate_init (sym
));
12349 /* F2008, C402 (R401): A colon shall not be used as a type-param-value
12350 except in the declaration of an entity or component that has the POINTER
12351 or ALLOCATABLE attribute. */
12354 deferred_requirements (gfc_symbol
*sym
)
12356 if (sym
->ts
.deferred
12357 && !(sym
->attr
.pointer
12358 || sym
->attr
.allocatable
12359 || sym
->attr
.associate_var
12360 || sym
->attr
.omp_udr_artificial_var
))
12362 gfc_error ("Entity %qs at %L has a deferred type parameter and "
12363 "requires either the POINTER or ALLOCATABLE attribute",
12364 sym
->name
, &sym
->declared_at
);
12371 /* Resolve symbols with flavor variable. */
12374 resolve_fl_variable (gfc_symbol
*sym
, int mp_flag
)
12376 const char *auto_save_msg
= "Automatic object %qs at %L cannot have the "
12379 if (!resolve_fl_var_and_proc (sym
, mp_flag
))
12382 /* Set this flag to check that variables are parameters of all entries.
12383 This check is effected by the call to gfc_resolve_expr through
12384 is_non_constant_shape_array. */
12385 bool saved_specification_expr
= specification_expr
;
12386 specification_expr
= true;
12388 if (sym
->ns
->proc_name
12389 && (sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
12390 || sym
->ns
->proc_name
->attr
.is_main_program
)
12391 && !sym
->attr
.use_assoc
12392 && !sym
->attr
.allocatable
12393 && !sym
->attr
.pointer
12394 && is_non_constant_shape_array (sym
))
12396 /* F08:C541. The shape of an array defined in a main program or module
12397 * needs to be constant. */
12398 gfc_error ("The module or main program array %qs at %L must "
12399 "have constant shape", sym
->name
, &sym
->declared_at
);
12400 specification_expr
= saved_specification_expr
;
12404 /* Constraints on deferred type parameter. */
12405 if (!deferred_requirements (sym
))
12408 if (sym
->ts
.type
== BT_CHARACTER
&& !sym
->attr
.associate_var
)
12410 /* Make sure that character string variables with assumed length are
12411 dummy arguments. */
12412 gfc_expr
*e
= NULL
;
12415 e
= sym
->ts
.u
.cl
->length
;
12419 if (e
== NULL
&& !sym
->attr
.dummy
&& !sym
->attr
.result
12420 && !sym
->ts
.deferred
&& !sym
->attr
.select_type_temporary
12421 && !sym
->attr
.omp_udr_artificial_var
)
12423 gfc_error ("Entity with assumed character length at %L must be a "
12424 "dummy argument or a PARAMETER", &sym
->declared_at
);
12425 specification_expr
= saved_specification_expr
;
12429 if (e
&& sym
->attr
.save
== SAVE_EXPLICIT
&& !gfc_is_constant_expr (e
))
12431 gfc_error (auto_save_msg
, sym
->name
, &sym
->declared_at
);
12432 specification_expr
= saved_specification_expr
;
12436 if (!gfc_is_constant_expr (e
)
12437 && !(e
->expr_type
== EXPR_VARIABLE
12438 && e
->symtree
->n
.sym
->attr
.flavor
== FL_PARAMETER
))
12440 if (!sym
->attr
.use_assoc
&& sym
->ns
->proc_name
12441 && (sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
12442 || sym
->ns
->proc_name
->attr
.is_main_program
))
12444 gfc_error ("%qs at %L must have constant character length "
12445 "in this context", sym
->name
, &sym
->declared_at
);
12446 specification_expr
= saved_specification_expr
;
12449 if (sym
->attr
.in_common
)
12451 gfc_error ("COMMON variable %qs at %L must have constant "
12452 "character length", sym
->name
, &sym
->declared_at
);
12453 specification_expr
= saved_specification_expr
;
12459 if (sym
->value
== NULL
&& sym
->attr
.referenced
)
12460 apply_default_init_local (sym
); /* Try to apply a default initialization. */
12462 /* Determine if the symbol may not have an initializer. */
12463 int no_init_flag
= 0, automatic_flag
= 0;
12464 if (sym
->attr
.allocatable
|| sym
->attr
.external
|| sym
->attr
.dummy
12465 || sym
->attr
.intrinsic
|| sym
->attr
.result
)
12467 else if ((sym
->attr
.dimension
|| sym
->attr
.codimension
) && !sym
->attr
.pointer
12468 && is_non_constant_shape_array (sym
))
12470 no_init_flag
= automatic_flag
= 1;
12472 /* Also, they must not have the SAVE attribute.
12473 SAVE_IMPLICIT is checked below. */
12474 if (sym
->as
&& sym
->attr
.codimension
)
12476 int corank
= sym
->as
->corank
;
12477 sym
->as
->corank
= 0;
12478 no_init_flag
= automatic_flag
= is_non_constant_shape_array (sym
);
12479 sym
->as
->corank
= corank
;
12481 if (automatic_flag
&& sym
->attr
.save
== SAVE_EXPLICIT
)
12483 gfc_error (auto_save_msg
, sym
->name
, &sym
->declared_at
);
12484 specification_expr
= saved_specification_expr
;
12489 /* Ensure that any initializer is simplified. */
12491 gfc_simplify_expr (sym
->value
, 1);
12493 /* Reject illegal initializers. */
12494 if (!sym
->mark
&& sym
->value
)
12496 if (sym
->attr
.allocatable
|| (sym
->ts
.type
== BT_CLASS
12497 && CLASS_DATA (sym
)->attr
.allocatable
))
12498 gfc_error ("Allocatable %qs at %L cannot have an initializer",
12499 sym
->name
, &sym
->declared_at
);
12500 else if (sym
->attr
.external
)
12501 gfc_error ("External %qs at %L cannot have an initializer",
12502 sym
->name
, &sym
->declared_at
);
12503 else if (sym
->attr
.dummy
12504 && !(sym
->ts
.type
== BT_DERIVED
&& sym
->attr
.intent
== INTENT_OUT
))
12505 gfc_error ("Dummy %qs at %L cannot have an initializer",
12506 sym
->name
, &sym
->declared_at
);
12507 else if (sym
->attr
.intrinsic
)
12508 gfc_error ("Intrinsic %qs at %L cannot have an initializer",
12509 sym
->name
, &sym
->declared_at
);
12510 else if (sym
->attr
.result
)
12511 gfc_error ("Function result %qs at %L cannot have an initializer",
12512 sym
->name
, &sym
->declared_at
);
12513 else if (automatic_flag
)
12514 gfc_error ("Automatic array %qs at %L cannot have an initializer",
12515 sym
->name
, &sym
->declared_at
);
12517 goto no_init_error
;
12518 specification_expr
= saved_specification_expr
;
12523 if (sym
->ts
.type
== BT_DERIVED
|| sym
->ts
.type
== BT_CLASS
)
12525 bool res
= resolve_fl_variable_derived (sym
, no_init_flag
);
12526 specification_expr
= saved_specification_expr
;
12530 specification_expr
= saved_specification_expr
;
12535 /* Compare the dummy characteristics of a module procedure interface
12536 declaration with the corresponding declaration in a submodule. */
12537 static gfc_formal_arglist
*new_formal
;
12538 static char errmsg
[200];
12541 compare_fsyms (gfc_symbol
*sym
)
12545 if (sym
== NULL
|| new_formal
== NULL
)
12548 fsym
= new_formal
->sym
;
12553 if (strcmp (sym
->name
, fsym
->name
) == 0)
12555 if (!gfc_check_dummy_characteristics (fsym
, sym
, true, errmsg
, 200))
12556 gfc_error ("%s at %L", errmsg
, &fsym
->declared_at
);
12561 /* Resolve a procedure. */
12564 resolve_fl_procedure (gfc_symbol
*sym
, int mp_flag
)
12566 gfc_formal_arglist
*arg
;
12568 if (sym
->attr
.function
12569 && !resolve_fl_var_and_proc (sym
, mp_flag
))
12572 if (sym
->ts
.type
== BT_CHARACTER
)
12574 gfc_charlen
*cl
= sym
->ts
.u
.cl
;
12576 if (cl
&& cl
->length
&& gfc_is_constant_expr (cl
->length
)
12577 && !resolve_charlen (cl
))
12580 if ((!cl
|| !cl
->length
|| cl
->length
->expr_type
!= EXPR_CONSTANT
)
12581 && sym
->attr
.proc
== PROC_ST_FUNCTION
)
12583 gfc_error ("Character-valued statement function %qs at %L must "
12584 "have constant length", sym
->name
, &sym
->declared_at
);
12589 /* Ensure that derived type for are not of a private type. Internal
12590 module procedures are excluded by 2.2.3.3 - i.e., they are not
12591 externally accessible and can access all the objects accessible in
12593 if (!(sym
->ns
->parent
&& sym
->ns
->parent
->proc_name
12594 && sym
->ns
->parent
->proc_name
->attr
.flavor
== FL_MODULE
)
12595 && gfc_check_symbol_access (sym
))
12597 gfc_interface
*iface
;
12599 for (arg
= gfc_sym_get_dummy_args (sym
); arg
; arg
= arg
->next
)
12602 && arg
->sym
->ts
.type
== BT_DERIVED
12603 && !arg
->sym
->ts
.u
.derived
->attr
.use_assoc
12604 && !gfc_check_symbol_access (arg
->sym
->ts
.u
.derived
)
12605 && !gfc_notify_std (GFC_STD_F2003
, "%qs is of a PRIVATE type "
12606 "and cannot be a dummy argument"
12607 " of %qs, which is PUBLIC at %L",
12608 arg
->sym
->name
, sym
->name
,
12609 &sym
->declared_at
))
12611 /* Stop this message from recurring. */
12612 arg
->sym
->ts
.u
.derived
->attr
.access
= ACCESS_PUBLIC
;
12617 /* PUBLIC interfaces may expose PRIVATE procedures that take types
12618 PRIVATE to the containing module. */
12619 for (iface
= sym
->generic
; iface
; iface
= iface
->next
)
12621 for (arg
= gfc_sym_get_dummy_args (iface
->sym
); arg
; arg
= arg
->next
)
12624 && arg
->sym
->ts
.type
== BT_DERIVED
12625 && !arg
->sym
->ts
.u
.derived
->attr
.use_assoc
12626 && !gfc_check_symbol_access (arg
->sym
->ts
.u
.derived
)
12627 && !gfc_notify_std (GFC_STD_F2003
, "Procedure %qs in "
12628 "PUBLIC interface %qs at %L "
12629 "takes dummy arguments of %qs which "
12630 "is PRIVATE", iface
->sym
->name
,
12631 sym
->name
, &iface
->sym
->declared_at
,
12632 gfc_typename(&arg
->sym
->ts
)))
12634 /* Stop this message from recurring. */
12635 arg
->sym
->ts
.u
.derived
->attr
.access
= ACCESS_PUBLIC
;
12642 if (sym
->attr
.function
&& sym
->value
&& sym
->attr
.proc
!= PROC_ST_FUNCTION
12643 && !sym
->attr
.proc_pointer
)
12645 gfc_error ("Function %qs at %L cannot have an initializer",
12646 sym
->name
, &sym
->declared_at
);
12648 /* Make sure no second error is issued for this. */
12649 sym
->value
->error
= 1;
12653 /* An external symbol may not have an initializer because it is taken to be
12654 a procedure. Exception: Procedure Pointers. */
12655 if (sym
->attr
.external
&& sym
->value
&& !sym
->attr
.proc_pointer
)
12657 gfc_error ("External object %qs at %L may not have an initializer",
12658 sym
->name
, &sym
->declared_at
);
12662 /* An elemental function is required to return a scalar 12.7.1 */
12663 if (sym
->attr
.elemental
&& sym
->attr
.function
12664 && (sym
->as
|| (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
)->as
)))
12666 gfc_error ("ELEMENTAL function %qs at %L must have a scalar "
12667 "result", sym
->name
, &sym
->declared_at
);
12668 /* Reset so that the error only occurs once. */
12669 sym
->attr
.elemental
= 0;
12673 if (sym
->attr
.proc
== PROC_ST_FUNCTION
12674 && (sym
->attr
.allocatable
|| sym
->attr
.pointer
))
12676 gfc_error ("Statement function %qs at %L may not have pointer or "
12677 "allocatable attribute", sym
->name
, &sym
->declared_at
);
12681 /* 5.1.1.5 of the Standard: A function name declared with an asterisk
12682 char-len-param shall not be array-valued, pointer-valued, recursive
12683 or pure. ....snip... A character value of * may only be used in the
12684 following ways: (i) Dummy arg of procedure - dummy associates with
12685 actual length; (ii) To declare a named constant; or (iii) External
12686 function - but length must be declared in calling scoping unit. */
12687 if (sym
->attr
.function
12688 && sym
->ts
.type
== BT_CHARACTER
&& !sym
->ts
.deferred
12689 && sym
->ts
.u
.cl
&& sym
->ts
.u
.cl
->length
== NULL
)
12691 if ((sym
->as
&& sym
->as
->rank
) || (sym
->attr
.pointer
)
12692 || (sym
->attr
.recursive
) || (sym
->attr
.pure
))
12694 if (sym
->as
&& sym
->as
->rank
)
12695 gfc_error ("CHARACTER(*) function %qs at %L cannot be "
12696 "array-valued", sym
->name
, &sym
->declared_at
);
12698 if (sym
->attr
.pointer
)
12699 gfc_error ("CHARACTER(*) function %qs at %L cannot be "
12700 "pointer-valued", sym
->name
, &sym
->declared_at
);
12702 if (sym
->attr
.pure
)
12703 gfc_error ("CHARACTER(*) function %qs at %L cannot be "
12704 "pure", sym
->name
, &sym
->declared_at
);
12706 if (sym
->attr
.recursive
)
12707 gfc_error ("CHARACTER(*) function %qs at %L cannot be "
12708 "recursive", sym
->name
, &sym
->declared_at
);
12713 /* Appendix B.2 of the standard. Contained functions give an
12714 error anyway. Deferred character length is an F2003 feature.
12715 Don't warn on intrinsic conversion functions, which start
12716 with two underscores. */
12717 if (!sym
->attr
.contained
&& !sym
->ts
.deferred
12718 && (sym
->name
[0] != '_' || sym
->name
[1] != '_'))
12719 gfc_notify_std (GFC_STD_F95_OBS
,
12720 "CHARACTER(*) function %qs at %L",
12721 sym
->name
, &sym
->declared_at
);
12724 /* F2008, C1218. */
12725 if (sym
->attr
.elemental
)
12727 if (sym
->attr
.proc_pointer
)
12729 gfc_error ("Procedure pointer %qs at %L shall not be elemental",
12730 sym
->name
, &sym
->declared_at
);
12733 if (sym
->attr
.dummy
)
12735 gfc_error ("Dummy procedure %qs at %L shall not be elemental",
12736 sym
->name
, &sym
->declared_at
);
12741 /* F2018, C15100: "The result of an elemental function shall be scalar,
12742 and shall not have the POINTER or ALLOCATABLE attribute." The scalar
12743 pointer is tested and caught elsewhere. */
12744 if (sym
->attr
.elemental
&& sym
->result
12745 && (sym
->result
->attr
.allocatable
|| sym
->result
->attr
.pointer
))
12747 gfc_error ("Function result variable %qs at %L of elemental "
12748 "function %qs shall not have an ALLOCATABLE or POINTER "
12749 "attribute", sym
->result
->name
,
12750 &sym
->result
->declared_at
, sym
->name
);
12754 if (sym
->attr
.is_bind_c
&& sym
->attr
.is_c_interop
!= 1)
12756 gfc_formal_arglist
*curr_arg
;
12757 int has_non_interop_arg
= 0;
12759 if (!verify_bind_c_sym (sym
, &(sym
->ts
), sym
->attr
.in_common
,
12760 sym
->common_block
))
12762 /* Clear these to prevent looking at them again if there was an
12764 sym
->attr
.is_bind_c
= 0;
12765 sym
->attr
.is_c_interop
= 0;
12766 sym
->ts
.is_c_interop
= 0;
12770 /* So far, no errors have been found. */
12771 sym
->attr
.is_c_interop
= 1;
12772 sym
->ts
.is_c_interop
= 1;
12775 curr_arg
= gfc_sym_get_dummy_args (sym
);
12776 while (curr_arg
!= NULL
)
12778 /* Skip implicitly typed dummy args here. */
12779 if (curr_arg
->sym
&& curr_arg
->sym
->attr
.implicit_type
== 0)
12780 if (!gfc_verify_c_interop_param (curr_arg
->sym
))
12781 /* If something is found to fail, record the fact so we
12782 can mark the symbol for the procedure as not being
12783 BIND(C) to try and prevent multiple errors being
12785 has_non_interop_arg
= 1;
12787 curr_arg
= curr_arg
->next
;
12790 /* See if any of the arguments were not interoperable and if so, clear
12791 the procedure symbol to prevent duplicate error messages. */
12792 if (has_non_interop_arg
!= 0)
12794 sym
->attr
.is_c_interop
= 0;
12795 sym
->ts
.is_c_interop
= 0;
12796 sym
->attr
.is_bind_c
= 0;
12800 if (!sym
->attr
.proc_pointer
)
12802 if (sym
->attr
.save
== SAVE_EXPLICIT
)
12804 gfc_error ("PROCEDURE attribute conflicts with SAVE attribute "
12805 "in %qs at %L", sym
->name
, &sym
->declared_at
);
12808 if (sym
->attr
.intent
)
12810 gfc_error ("PROCEDURE attribute conflicts with INTENT attribute "
12811 "in %qs at %L", sym
->name
, &sym
->declared_at
);
12814 if (sym
->attr
.subroutine
&& sym
->attr
.result
)
12816 gfc_error ("PROCEDURE attribute conflicts with RESULT attribute "
12817 "in %qs at %L", sym
->name
, &sym
->declared_at
);
12820 if (sym
->attr
.external
&& sym
->attr
.function
&& !sym
->attr
.module_procedure
12821 && ((sym
->attr
.if_source
== IFSRC_DECL
&& !sym
->attr
.procedure
)
12822 || sym
->attr
.contained
))
12824 gfc_error ("EXTERNAL attribute conflicts with FUNCTION attribute "
12825 "in %qs at %L", sym
->name
, &sym
->declared_at
);
12828 if (strcmp ("ppr@", sym
->name
) == 0)
12830 gfc_error ("Procedure pointer result %qs at %L "
12831 "is missing the pointer attribute",
12832 sym
->ns
->proc_name
->name
, &sym
->declared_at
);
12837 /* Assume that a procedure whose body is not known has references
12838 to external arrays. */
12839 if (sym
->attr
.if_source
!= IFSRC_DECL
)
12840 sym
->attr
.array_outer_dependency
= 1;
12842 /* Compare the characteristics of a module procedure with the
12843 interface declaration. Ideally this would be done with
12844 gfc_compare_interfaces but, at present, the formal interface
12845 cannot be copied to the ts.interface. */
12846 if (sym
->attr
.module_procedure
12847 && sym
->attr
.if_source
== IFSRC_DECL
)
12850 char name
[2*GFC_MAX_SYMBOL_LEN
+ 1];
12852 char *submodule_name
;
12853 strcpy (name
, sym
->ns
->proc_name
->name
);
12854 module_name
= strtok (name
, ".");
12855 submodule_name
= strtok (NULL
, ".");
12857 iface
= sym
->tlink
;
12860 /* Make sure that the result uses the correct charlen for deferred
12862 if (iface
&& sym
->result
12863 && iface
->ts
.type
== BT_CHARACTER
12864 && iface
->ts
.deferred
)
12865 sym
->result
->ts
.u
.cl
= iface
->ts
.u
.cl
;
12870 /* Check the procedure characteristics. */
12871 if (sym
->attr
.elemental
!= iface
->attr
.elemental
)
12873 gfc_error ("Mismatch in ELEMENTAL attribute between MODULE "
12874 "PROCEDURE at %L and its interface in %s",
12875 &sym
->declared_at
, module_name
);
12879 if (sym
->attr
.pure
!= iface
->attr
.pure
)
12881 gfc_error ("Mismatch in PURE attribute between MODULE "
12882 "PROCEDURE at %L and its interface in %s",
12883 &sym
->declared_at
, module_name
);
12887 if (sym
->attr
.recursive
!= iface
->attr
.recursive
)
12889 gfc_error ("Mismatch in RECURSIVE attribute between MODULE "
12890 "PROCEDURE at %L and its interface in %s",
12891 &sym
->declared_at
, module_name
);
12895 /* Check the result characteristics. */
12896 if (!gfc_check_result_characteristics (sym
, iface
, errmsg
, 200))
12898 gfc_error ("%s between the MODULE PROCEDURE declaration "
12899 "in MODULE %qs and the declaration at %L in "
12901 errmsg
, module_name
, &sym
->declared_at
,
12902 submodule_name
? submodule_name
: module_name
);
12907 /* Check the characteristics of the formal arguments. */
12908 if (sym
->formal
&& sym
->formal_ns
)
12910 for (arg
= sym
->formal
; arg
&& arg
->sym
; arg
= arg
->next
)
12913 gfc_traverse_ns (sym
->formal_ns
, compare_fsyms
);
12921 /* Resolve a list of finalizer procedures. That is, after they have hopefully
12922 been defined and we now know their defined arguments, check that they fulfill
12923 the requirements of the standard for procedures used as finalizers. */
12926 gfc_resolve_finalizers (gfc_symbol
* derived
, bool *finalizable
)
12928 gfc_finalizer
* list
;
12929 gfc_finalizer
** prev_link
; /* For removing wrong entries from the list. */
12930 bool result
= true;
12931 bool seen_scalar
= false;
12934 gfc_symbol
*parent
= gfc_get_derived_super_type (derived
);
12937 gfc_resolve_finalizers (parent
, finalizable
);
12939 /* Ensure that derived-type components have a their finalizers resolved. */
12940 bool has_final
= derived
->f2k_derived
&& derived
->f2k_derived
->finalizers
;
12941 for (c
= derived
->components
; c
; c
= c
->next
)
12942 if (c
->ts
.type
== BT_DERIVED
12943 && !c
->attr
.pointer
&& !c
->attr
.proc_pointer
&& !c
->attr
.allocatable
)
12945 bool has_final2
= false;
12946 if (!gfc_resolve_finalizers (c
->ts
.u
.derived
, &has_final2
))
12947 return false; /* Error. */
12948 has_final
= has_final
|| has_final2
;
12950 /* Return early if not finalizable. */
12954 *finalizable
= false;
12958 /* Walk over the list of finalizer-procedures, check them, and if any one
12959 does not fit in with the standard's definition, print an error and remove
12960 it from the list. */
12961 prev_link
= &derived
->f2k_derived
->finalizers
;
12962 for (list
= derived
->f2k_derived
->finalizers
; list
; list
= *prev_link
)
12964 gfc_formal_arglist
*dummy_args
;
12969 /* Skip this finalizer if we already resolved it. */
12970 if (list
->proc_tree
)
12972 if (list
->proc_tree
->n
.sym
->formal
->sym
->as
== NULL
12973 || list
->proc_tree
->n
.sym
->formal
->sym
->as
->rank
== 0)
12974 seen_scalar
= true;
12975 prev_link
= &(list
->next
);
12979 /* Check this exists and is a SUBROUTINE. */
12980 if (!list
->proc_sym
->attr
.subroutine
)
12982 gfc_error ("FINAL procedure %qs at %L is not a SUBROUTINE",
12983 list
->proc_sym
->name
, &list
->where
);
12987 /* We should have exactly one argument. */
12988 dummy_args
= gfc_sym_get_dummy_args (list
->proc_sym
);
12989 if (!dummy_args
|| dummy_args
->next
)
12991 gfc_error ("FINAL procedure at %L must have exactly one argument",
12995 arg
= dummy_args
->sym
;
12997 /* This argument must be of our type. */
12998 if (arg
->ts
.type
!= BT_DERIVED
|| arg
->ts
.u
.derived
!= derived
)
13000 gfc_error ("Argument of FINAL procedure at %L must be of type %qs",
13001 &arg
->declared_at
, derived
->name
);
13005 /* It must neither be a pointer nor allocatable nor optional. */
13006 if (arg
->attr
.pointer
)
13008 gfc_error ("Argument of FINAL procedure at %L must not be a POINTER",
13009 &arg
->declared_at
);
13012 if (arg
->attr
.allocatable
)
13014 gfc_error ("Argument of FINAL procedure at %L must not be"
13015 " ALLOCATABLE", &arg
->declared_at
);
13018 if (arg
->attr
.optional
)
13020 gfc_error ("Argument of FINAL procedure at %L must not be OPTIONAL",
13021 &arg
->declared_at
);
13025 /* It must not be INTENT(OUT). */
13026 if (arg
->attr
.intent
== INTENT_OUT
)
13028 gfc_error ("Argument of FINAL procedure at %L must not be"
13029 " INTENT(OUT)", &arg
->declared_at
);
13033 /* Warn if the procedure is non-scalar and not assumed shape. */
13034 if (warn_surprising
&& arg
->as
&& arg
->as
->rank
!= 0
13035 && arg
->as
->type
!= AS_ASSUMED_SHAPE
)
13036 gfc_warning (OPT_Wsurprising
,
13037 "Non-scalar FINAL procedure at %L should have assumed"
13038 " shape argument", &arg
->declared_at
);
13040 /* Check that it does not match in kind and rank with a FINAL procedure
13041 defined earlier. To really loop over the *earlier* declarations,
13042 we need to walk the tail of the list as new ones were pushed at the
13044 /* TODO: Handle kind parameters once they are implemented. */
13045 my_rank
= (arg
->as
? arg
->as
->rank
: 0);
13046 for (i
= list
->next
; i
; i
= i
->next
)
13048 gfc_formal_arglist
*dummy_args
;
13050 /* Argument list might be empty; that is an error signalled earlier,
13051 but we nevertheless continued resolving. */
13052 dummy_args
= gfc_sym_get_dummy_args (i
->proc_sym
);
13055 gfc_symbol
* i_arg
= dummy_args
->sym
;
13056 const int i_rank
= (i_arg
->as
? i_arg
->as
->rank
: 0);
13057 if (i_rank
== my_rank
)
13059 gfc_error ("FINAL procedure %qs declared at %L has the same"
13060 " rank (%d) as %qs",
13061 list
->proc_sym
->name
, &list
->where
, my_rank
,
13062 i
->proc_sym
->name
);
13068 /* Is this the/a scalar finalizer procedure? */
13070 seen_scalar
= true;
13072 /* Find the symtree for this procedure. */
13073 gcc_assert (!list
->proc_tree
);
13074 list
->proc_tree
= gfc_find_sym_in_symtree (list
->proc_sym
);
13076 prev_link
= &list
->next
;
13079 /* Remove wrong nodes immediately from the list so we don't risk any
13080 troubles in the future when they might fail later expectations. */
13083 *prev_link
= list
->next
;
13084 gfc_free_finalizer (i
);
13088 if (result
== false)
13091 /* Warn if we haven't seen a scalar finalizer procedure (but we know there
13092 were nodes in the list, must have been for arrays. It is surely a good
13093 idea to have a scalar version there if there's something to finalize. */
13094 if (warn_surprising
&& derived
->f2k_derived
->finalizers
&& !seen_scalar
)
13095 gfc_warning (OPT_Wsurprising
,
13096 "Only array FINAL procedures declared for derived type %qs"
13097 " defined at %L, suggest also scalar one",
13098 derived
->name
, &derived
->declared_at
);
13100 vtab
= gfc_find_derived_vtab (derived
);
13101 c
= vtab
->ts
.u
.derived
->components
->next
->next
->next
->next
->next
;
13102 gfc_set_sym_referenced (c
->initializer
->symtree
->n
.sym
);
13105 *finalizable
= true;
13111 /* Check if two GENERIC targets are ambiguous and emit an error is they are. */
13114 check_generic_tbp_ambiguity (gfc_tbp_generic
* t1
, gfc_tbp_generic
* t2
,
13115 const char* generic_name
, locus where
)
13117 gfc_symbol
*sym1
, *sym2
;
13118 const char *pass1
, *pass2
;
13119 gfc_formal_arglist
*dummy_args
;
13121 gcc_assert (t1
->specific
&& t2
->specific
);
13122 gcc_assert (!t1
->specific
->is_generic
);
13123 gcc_assert (!t2
->specific
->is_generic
);
13124 gcc_assert (t1
->is_operator
== t2
->is_operator
);
13126 sym1
= t1
->specific
->u
.specific
->n
.sym
;
13127 sym2
= t2
->specific
->u
.specific
->n
.sym
;
13132 /* Both must be SUBROUTINEs or both must be FUNCTIONs. */
13133 if (sym1
->attr
.subroutine
!= sym2
->attr
.subroutine
13134 || sym1
->attr
.function
!= sym2
->attr
.function
)
13136 gfc_error ("%qs and %qs cannot be mixed FUNCTION/SUBROUTINE for"
13137 " GENERIC %qs at %L",
13138 sym1
->name
, sym2
->name
, generic_name
, &where
);
13142 /* Determine PASS arguments. */
13143 if (t1
->specific
->nopass
)
13145 else if (t1
->specific
->pass_arg
)
13146 pass1
= t1
->specific
->pass_arg
;
13149 dummy_args
= gfc_sym_get_dummy_args (t1
->specific
->u
.specific
->n
.sym
);
13151 pass1
= dummy_args
->sym
->name
;
13155 if (t2
->specific
->nopass
)
13157 else if (t2
->specific
->pass_arg
)
13158 pass2
= t2
->specific
->pass_arg
;
13161 dummy_args
= gfc_sym_get_dummy_args (t2
->specific
->u
.specific
->n
.sym
);
13163 pass2
= dummy_args
->sym
->name
;
13168 /* Compare the interfaces. */
13169 if (gfc_compare_interfaces (sym1
, sym2
, sym2
->name
, !t1
->is_operator
, 0,
13170 NULL
, 0, pass1
, pass2
))
13172 gfc_error ("%qs and %qs for GENERIC %qs at %L are ambiguous",
13173 sym1
->name
, sym2
->name
, generic_name
, &where
);
13181 /* Worker function for resolving a generic procedure binding; this is used to
13182 resolve GENERIC as well as user and intrinsic OPERATOR typebound procedures.
13184 The difference between those cases is finding possible inherited bindings
13185 that are overridden, as one has to look for them in tb_sym_root,
13186 tb_uop_root or tb_op, respectively. Thus the caller must already find
13187 the super-type and set p->overridden correctly. */
13190 resolve_tb_generic_targets (gfc_symbol
* super_type
,
13191 gfc_typebound_proc
* p
, const char* name
)
13193 gfc_tbp_generic
* target
;
13194 gfc_symtree
* first_target
;
13195 gfc_symtree
* inherited
;
13197 gcc_assert (p
&& p
->is_generic
);
13199 /* Try to find the specific bindings for the symtrees in our target-list. */
13200 gcc_assert (p
->u
.generic
);
13201 for (target
= p
->u
.generic
; target
; target
= target
->next
)
13202 if (!target
->specific
)
13204 gfc_typebound_proc
* overridden_tbp
;
13205 gfc_tbp_generic
* g
;
13206 const char* target_name
;
13208 target_name
= target
->specific_st
->name
;
13210 /* Defined for this type directly. */
13211 if (target
->specific_st
->n
.tb
&& !target
->specific_st
->n
.tb
->error
)
13213 target
->specific
= target
->specific_st
->n
.tb
;
13214 goto specific_found
;
13217 /* Look for an inherited specific binding. */
13220 inherited
= gfc_find_typebound_proc (super_type
, NULL
, target_name
,
13225 gcc_assert (inherited
->n
.tb
);
13226 target
->specific
= inherited
->n
.tb
;
13227 goto specific_found
;
13231 gfc_error ("Undefined specific binding %qs as target of GENERIC %qs"
13232 " at %L", target_name
, name
, &p
->where
);
13235 /* Once we've found the specific binding, check it is not ambiguous with
13236 other specifics already found or inherited for the same GENERIC. */
13238 gcc_assert (target
->specific
);
13240 /* This must really be a specific binding! */
13241 if (target
->specific
->is_generic
)
13243 gfc_error ("GENERIC %qs at %L must target a specific binding,"
13244 " %qs is GENERIC, too", name
, &p
->where
, target_name
);
13248 /* Check those already resolved on this type directly. */
13249 for (g
= p
->u
.generic
; g
; g
= g
->next
)
13250 if (g
!= target
&& g
->specific
13251 && !check_generic_tbp_ambiguity (target
, g
, name
, p
->where
))
13254 /* Check for ambiguity with inherited specific targets. */
13255 for (overridden_tbp
= p
->overridden
; overridden_tbp
;
13256 overridden_tbp
= overridden_tbp
->overridden
)
13257 if (overridden_tbp
->is_generic
)
13259 for (g
= overridden_tbp
->u
.generic
; g
; g
= g
->next
)
13261 gcc_assert (g
->specific
);
13262 if (!check_generic_tbp_ambiguity (target
, g
, name
, p
->where
))
13268 /* If we attempt to "overwrite" a specific binding, this is an error. */
13269 if (p
->overridden
&& !p
->overridden
->is_generic
)
13271 gfc_error ("GENERIC %qs at %L cannot overwrite specific binding with"
13272 " the same name", name
, &p
->where
);
13276 /* Take the SUBROUTINE/FUNCTION attributes of the first specific target, as
13277 all must have the same attributes here. */
13278 first_target
= p
->u
.generic
->specific
->u
.specific
;
13279 gcc_assert (first_target
);
13280 p
->subroutine
= first_target
->n
.sym
->attr
.subroutine
;
13281 p
->function
= first_target
->n
.sym
->attr
.function
;
13287 /* Resolve a GENERIC procedure binding for a derived type. */
13290 resolve_typebound_generic (gfc_symbol
* derived
, gfc_symtree
* st
)
13292 gfc_symbol
* super_type
;
13294 /* Find the overridden binding if any. */
13295 st
->n
.tb
->overridden
= NULL
;
13296 super_type
= gfc_get_derived_super_type (derived
);
13299 gfc_symtree
* overridden
;
13300 overridden
= gfc_find_typebound_proc (super_type
, NULL
, st
->name
,
13303 if (overridden
&& overridden
->n
.tb
)
13304 st
->n
.tb
->overridden
= overridden
->n
.tb
;
13307 /* Resolve using worker function. */
13308 return resolve_tb_generic_targets (super_type
, st
->n
.tb
, st
->name
);
13312 /* Retrieve the target-procedure of an operator binding and do some checks in
13313 common for intrinsic and user-defined type-bound operators. */
13316 get_checked_tb_operator_target (gfc_tbp_generic
* target
, locus where
)
13318 gfc_symbol
* target_proc
;
13320 gcc_assert (target
->specific
&& !target
->specific
->is_generic
);
13321 target_proc
= target
->specific
->u
.specific
->n
.sym
;
13322 gcc_assert (target_proc
);
13324 /* F08:C468. All operator bindings must have a passed-object dummy argument. */
13325 if (target
->specific
->nopass
)
13327 gfc_error ("Type-bound operator at %L cannot be NOPASS", &where
);
13331 return target_proc
;
13335 /* Resolve a type-bound intrinsic operator. */
13338 resolve_typebound_intrinsic_op (gfc_symbol
* derived
, gfc_intrinsic_op op
,
13339 gfc_typebound_proc
* p
)
13341 gfc_symbol
* super_type
;
13342 gfc_tbp_generic
* target
;
13344 /* If there's already an error here, do nothing (but don't fail again). */
13348 /* Operators should always be GENERIC bindings. */
13349 gcc_assert (p
->is_generic
);
13351 /* Look for an overridden binding. */
13352 super_type
= gfc_get_derived_super_type (derived
);
13353 if (super_type
&& super_type
->f2k_derived
)
13354 p
->overridden
= gfc_find_typebound_intrinsic_op (super_type
, NULL
,
13357 p
->overridden
= NULL
;
13359 /* Resolve general GENERIC properties using worker function. */
13360 if (!resolve_tb_generic_targets (super_type
, p
, gfc_op2string(op
)))
13363 /* Check the targets to be procedures of correct interface. */
13364 for (target
= p
->u
.generic
; target
; target
= target
->next
)
13366 gfc_symbol
* target_proc
;
13368 target_proc
= get_checked_tb_operator_target (target
, p
->where
);
13372 if (!gfc_check_operator_interface (target_proc
, op
, p
->where
))
13375 /* Add target to non-typebound operator list. */
13376 if (!target
->specific
->deferred
&& !derived
->attr
.use_assoc
13377 && p
->access
!= ACCESS_PRIVATE
&& derived
->ns
== gfc_current_ns
)
13379 gfc_interface
*head
, *intr
;
13381 /* Preempt 'gfc_check_new_interface' for submodules, where the
13382 mechanism for handling module procedures winds up resolving
13383 operator interfaces twice and would otherwise cause an error. */
13384 for (intr
= derived
->ns
->op
[op
]; intr
; intr
= intr
->next
)
13385 if (intr
->sym
== target_proc
13386 && target_proc
->attr
.used_in_submodule
)
13389 if (!gfc_check_new_interface (derived
->ns
->op
[op
],
13390 target_proc
, p
->where
))
13392 head
= derived
->ns
->op
[op
];
13393 intr
= gfc_get_interface ();
13394 intr
->sym
= target_proc
;
13395 intr
->where
= p
->where
;
13397 derived
->ns
->op
[op
] = intr
;
13409 /* Resolve a type-bound user operator (tree-walker callback). */
13411 static gfc_symbol
* resolve_bindings_derived
;
13412 static bool resolve_bindings_result
;
13414 static bool check_uop_procedure (gfc_symbol
* sym
, locus where
);
13417 resolve_typebound_user_op (gfc_symtree
* stree
)
13419 gfc_symbol
* super_type
;
13420 gfc_tbp_generic
* target
;
13422 gcc_assert (stree
&& stree
->n
.tb
);
13424 if (stree
->n
.tb
->error
)
13427 /* Operators should always be GENERIC bindings. */
13428 gcc_assert (stree
->n
.tb
->is_generic
);
13430 /* Find overridden procedure, if any. */
13431 super_type
= gfc_get_derived_super_type (resolve_bindings_derived
);
13432 if (super_type
&& super_type
->f2k_derived
)
13434 gfc_symtree
* overridden
;
13435 overridden
= gfc_find_typebound_user_op (super_type
, NULL
,
13436 stree
->name
, true, NULL
);
13438 if (overridden
&& overridden
->n
.tb
)
13439 stree
->n
.tb
->overridden
= overridden
->n
.tb
;
13442 stree
->n
.tb
->overridden
= NULL
;
13444 /* Resolve basically using worker function. */
13445 if (!resolve_tb_generic_targets (super_type
, stree
->n
.tb
, stree
->name
))
13448 /* Check the targets to be functions of correct interface. */
13449 for (target
= stree
->n
.tb
->u
.generic
; target
; target
= target
->next
)
13451 gfc_symbol
* target_proc
;
13453 target_proc
= get_checked_tb_operator_target (target
, stree
->n
.tb
->where
);
13457 if (!check_uop_procedure (target_proc
, stree
->n
.tb
->where
))
13464 resolve_bindings_result
= false;
13465 stree
->n
.tb
->error
= 1;
13469 /* Resolve the type-bound procedures for a derived type. */
13472 resolve_typebound_procedure (gfc_symtree
* stree
)
13476 gfc_symbol
* me_arg
;
13477 gfc_symbol
* super_type
;
13478 gfc_component
* comp
;
13480 gcc_assert (stree
);
13482 /* Undefined specific symbol from GENERIC target definition. */
13486 if (stree
->n
.tb
->error
)
13489 /* If this is a GENERIC binding, use that routine. */
13490 if (stree
->n
.tb
->is_generic
)
13492 if (!resolve_typebound_generic (resolve_bindings_derived
, stree
))
13497 /* Get the target-procedure to check it. */
13498 gcc_assert (!stree
->n
.tb
->is_generic
);
13499 gcc_assert (stree
->n
.tb
->u
.specific
);
13500 proc
= stree
->n
.tb
->u
.specific
->n
.sym
;
13501 where
= stree
->n
.tb
->where
;
13503 /* Default access should already be resolved from the parser. */
13504 gcc_assert (stree
->n
.tb
->access
!= ACCESS_UNKNOWN
);
13506 if (stree
->n
.tb
->deferred
)
13508 if (!check_proc_interface (proc
, &where
))
13513 /* Check for F08:C465. */
13514 if ((!proc
->attr
.subroutine
&& !proc
->attr
.function
)
13515 || (proc
->attr
.proc
!= PROC_MODULE
13516 && proc
->attr
.if_source
!= IFSRC_IFBODY
)
13517 || proc
->attr
.abstract
)
13519 gfc_error ("%qs must be a module procedure or an external procedure with"
13520 " an explicit interface at %L", proc
->name
, &where
);
13525 stree
->n
.tb
->subroutine
= proc
->attr
.subroutine
;
13526 stree
->n
.tb
->function
= proc
->attr
.function
;
13528 /* Find the super-type of the current derived type. We could do this once and
13529 store in a global if speed is needed, but as long as not I believe this is
13530 more readable and clearer. */
13531 super_type
= gfc_get_derived_super_type (resolve_bindings_derived
);
13533 /* If PASS, resolve and check arguments if not already resolved / loaded
13534 from a .mod file. */
13535 if (!stree
->n
.tb
->nopass
&& stree
->n
.tb
->pass_arg_num
== 0)
13537 gfc_formal_arglist
*dummy_args
;
13539 dummy_args
= gfc_sym_get_dummy_args (proc
);
13540 if (stree
->n
.tb
->pass_arg
)
13542 gfc_formal_arglist
*i
;
13544 /* If an explicit passing argument name is given, walk the arg-list
13545 and look for it. */
13548 stree
->n
.tb
->pass_arg_num
= 1;
13549 for (i
= dummy_args
; i
; i
= i
->next
)
13551 if (!strcmp (i
->sym
->name
, stree
->n
.tb
->pass_arg
))
13556 ++stree
->n
.tb
->pass_arg_num
;
13561 gfc_error ("Procedure %qs with PASS(%s) at %L has no"
13563 proc
->name
, stree
->n
.tb
->pass_arg
, &where
,
13564 stree
->n
.tb
->pass_arg
);
13570 /* Otherwise, take the first one; there should in fact be at least
13572 stree
->n
.tb
->pass_arg_num
= 1;
13575 gfc_error ("Procedure %qs with PASS at %L must have at"
13576 " least one argument", proc
->name
, &where
);
13579 me_arg
= dummy_args
->sym
;
13582 /* Now check that the argument-type matches and the passed-object
13583 dummy argument is generally fine. */
13585 gcc_assert (me_arg
);
13587 if (me_arg
->ts
.type
!= BT_CLASS
)
13589 gfc_error ("Non-polymorphic passed-object dummy argument of %qs"
13590 " at %L", proc
->name
, &where
);
13594 if (CLASS_DATA (me_arg
)->ts
.u
.derived
13595 != resolve_bindings_derived
)
13597 gfc_error ("Argument %qs of %qs with PASS(%s) at %L must be of"
13598 " the derived-type %qs", me_arg
->name
, proc
->name
,
13599 me_arg
->name
, &where
, resolve_bindings_derived
->name
);
13603 gcc_assert (me_arg
->ts
.type
== BT_CLASS
);
13604 if (CLASS_DATA (me_arg
)->as
&& CLASS_DATA (me_arg
)->as
->rank
!= 0)
13606 gfc_error ("Passed-object dummy argument of %qs at %L must be"
13607 " scalar", proc
->name
, &where
);
13610 if (CLASS_DATA (me_arg
)->attr
.allocatable
)
13612 gfc_error ("Passed-object dummy argument of %qs at %L must not"
13613 " be ALLOCATABLE", proc
->name
, &where
);
13616 if (CLASS_DATA (me_arg
)->attr
.class_pointer
)
13618 gfc_error ("Passed-object dummy argument of %qs at %L must not"
13619 " be POINTER", proc
->name
, &where
);
13624 /* If we are extending some type, check that we don't override a procedure
13625 flagged NON_OVERRIDABLE. */
13626 stree
->n
.tb
->overridden
= NULL
;
13629 gfc_symtree
* overridden
;
13630 overridden
= gfc_find_typebound_proc (super_type
, NULL
,
13631 stree
->name
, true, NULL
);
13635 if (overridden
->n
.tb
)
13636 stree
->n
.tb
->overridden
= overridden
->n
.tb
;
13638 if (!gfc_check_typebound_override (stree
, overridden
))
13643 /* See if there's a name collision with a component directly in this type. */
13644 for (comp
= resolve_bindings_derived
->components
; comp
; comp
= comp
->next
)
13645 if (!strcmp (comp
->name
, stree
->name
))
13647 gfc_error ("Procedure %qs at %L has the same name as a component of"
13649 stree
->name
, &where
, resolve_bindings_derived
->name
);
13653 /* Try to find a name collision with an inherited component. */
13654 if (super_type
&& gfc_find_component (super_type
, stree
->name
, true, true,
13657 gfc_error ("Procedure %qs at %L has the same name as an inherited"
13658 " component of %qs",
13659 stree
->name
, &where
, resolve_bindings_derived
->name
);
13663 stree
->n
.tb
->error
= 0;
13667 resolve_bindings_result
= false;
13668 stree
->n
.tb
->error
= 1;
13673 resolve_typebound_procedures (gfc_symbol
* derived
)
13676 gfc_symbol
* super_type
;
13678 if (!derived
->f2k_derived
|| !derived
->f2k_derived
->tb_sym_root
)
13681 super_type
= gfc_get_derived_super_type (derived
);
13683 resolve_symbol (super_type
);
13685 resolve_bindings_derived
= derived
;
13686 resolve_bindings_result
= true;
13688 if (derived
->f2k_derived
->tb_sym_root
)
13689 gfc_traverse_symtree (derived
->f2k_derived
->tb_sym_root
,
13690 &resolve_typebound_procedure
);
13692 if (derived
->f2k_derived
->tb_uop_root
)
13693 gfc_traverse_symtree (derived
->f2k_derived
->tb_uop_root
,
13694 &resolve_typebound_user_op
);
13696 for (op
= 0; op
!= GFC_INTRINSIC_OPS
; ++op
)
13698 gfc_typebound_proc
* p
= derived
->f2k_derived
->tb_op
[op
];
13699 if (p
&& !resolve_typebound_intrinsic_op (derived
,
13700 (gfc_intrinsic_op
)op
, p
))
13701 resolve_bindings_result
= false;
13704 return resolve_bindings_result
;
13708 /* Add a derived type to the dt_list. The dt_list is used in trans-types.c
13709 to give all identical derived types the same backend_decl. */
13711 add_dt_to_dt_list (gfc_symbol
*derived
)
13713 if (!derived
->dt_next
)
13715 if (gfc_derived_types
)
13717 derived
->dt_next
= gfc_derived_types
->dt_next
;
13718 gfc_derived_types
->dt_next
= derived
;
13722 derived
->dt_next
= derived
;
13724 gfc_derived_types
= derived
;
13729 /* Ensure that a derived-type is really not abstract, meaning that every
13730 inherited DEFERRED binding is overridden by a non-DEFERRED one. */
13733 ensure_not_abstract_walker (gfc_symbol
* sub
, gfc_symtree
* st
)
13738 if (!ensure_not_abstract_walker (sub
, st
->left
))
13740 if (!ensure_not_abstract_walker (sub
, st
->right
))
13743 if (st
->n
.tb
&& st
->n
.tb
->deferred
)
13745 gfc_symtree
* overriding
;
13746 overriding
= gfc_find_typebound_proc (sub
, NULL
, st
->name
, true, NULL
);
13749 gcc_assert (overriding
->n
.tb
);
13750 if (overriding
->n
.tb
->deferred
)
13752 gfc_error ("Derived-type %qs declared at %L must be ABSTRACT because"
13753 " %qs is DEFERRED and not overridden",
13754 sub
->name
, &sub
->declared_at
, st
->name
);
13763 ensure_not_abstract (gfc_symbol
* sub
, gfc_symbol
* ancestor
)
13765 /* The algorithm used here is to recursively travel up the ancestry of sub
13766 and for each ancestor-type, check all bindings. If any of them is
13767 DEFERRED, look it up starting from sub and see if the found (overriding)
13768 binding is not DEFERRED.
13769 This is not the most efficient way to do this, but it should be ok and is
13770 clearer than something sophisticated. */
13772 gcc_assert (ancestor
&& !sub
->attr
.abstract
);
13774 if (!ancestor
->attr
.abstract
)
13777 /* Walk bindings of this ancestor. */
13778 if (ancestor
->f2k_derived
)
13781 t
= ensure_not_abstract_walker (sub
, ancestor
->f2k_derived
->tb_sym_root
);
13786 /* Find next ancestor type and recurse on it. */
13787 ancestor
= gfc_get_derived_super_type (ancestor
);
13789 return ensure_not_abstract (sub
, ancestor
);
13795 /* This check for typebound defined assignments is done recursively
13796 since the order in which derived types are resolved is not always in
13797 order of the declarations. */
13800 check_defined_assignments (gfc_symbol
*derived
)
13804 for (c
= derived
->components
; c
; c
= c
->next
)
13806 if (!gfc_bt_struct (c
->ts
.type
)
13808 || c
->attr
.allocatable
13809 || c
->attr
.proc_pointer_comp
13810 || c
->attr
.class_pointer
13811 || c
->attr
.proc_pointer
)
13814 if (c
->ts
.u
.derived
->attr
.defined_assign_comp
13815 || (c
->ts
.u
.derived
->f2k_derived
13816 && c
->ts
.u
.derived
->f2k_derived
->tb_op
[INTRINSIC_ASSIGN
]))
13818 derived
->attr
.defined_assign_comp
= 1;
13822 check_defined_assignments (c
->ts
.u
.derived
);
13823 if (c
->ts
.u
.derived
->attr
.defined_assign_comp
)
13825 derived
->attr
.defined_assign_comp
= 1;
13832 /* Resolve a single component of a derived type or structure. */
13835 resolve_component (gfc_component
*c
, gfc_symbol
*sym
)
13837 gfc_symbol
*super_type
;
13838 symbol_attribute
*attr
;
13840 if (c
->attr
.artificial
)
13843 /* Do not allow vtype components to be resolved in nameless namespaces
13844 such as block data because the procedure pointers will cause ICEs
13845 and vtables are not needed in these contexts. */
13846 if (sym
->attr
.vtype
&& sym
->attr
.use_assoc
13847 && sym
->ns
->proc_name
== NULL
)
13851 if ((!sym
->attr
.is_class
|| c
!= sym
->components
)
13852 && c
->attr
.codimension
13853 && (!c
->attr
.allocatable
|| (c
->as
&& c
->as
->type
!= AS_DEFERRED
)))
13855 gfc_error ("Coarray component %qs at %L must be allocatable with "
13856 "deferred shape", c
->name
, &c
->loc
);
13861 if (c
->attr
.codimension
&& c
->ts
.type
== BT_DERIVED
13862 && c
->ts
.u
.derived
->ts
.is_iso_c
)
13864 gfc_error ("Component %qs at %L of TYPE(C_PTR) or TYPE(C_FUNPTR) "
13865 "shall not be a coarray", c
->name
, &c
->loc
);
13870 if (gfc_bt_struct (c
->ts
.type
) && c
->ts
.u
.derived
->attr
.coarray_comp
13871 && (c
->attr
.codimension
|| c
->attr
.pointer
|| c
->attr
.dimension
13872 || c
->attr
.allocatable
))
13874 gfc_error ("Component %qs at %L with coarray component "
13875 "shall be a nonpointer, nonallocatable scalar",
13881 if (c
->ts
.type
== BT_CLASS
)
13883 if (CLASS_DATA (c
))
13885 attr
= &(CLASS_DATA (c
)->attr
);
13887 /* Fix up contiguous attribute. */
13888 if (c
->attr
.contiguous
)
13889 attr
->contiguous
= 1;
13897 if (attr
&& attr
->contiguous
&& (!attr
->dimension
|| !attr
->pointer
))
13899 gfc_error ("Component %qs at %L has the CONTIGUOUS attribute but "
13900 "is not an array pointer", c
->name
, &c
->loc
);
13904 /* F2003, 15.2.1 - length has to be one. */
13905 if (sym
->attr
.is_bind_c
&& c
->ts
.type
== BT_CHARACTER
13906 && (c
->ts
.u
.cl
== NULL
|| c
->ts
.u
.cl
->length
== NULL
13907 || !gfc_is_constant_expr (c
->ts
.u
.cl
->length
)
13908 || mpz_cmp_si (c
->ts
.u
.cl
->length
->value
.integer
, 1) != 0))
13910 gfc_error ("Component %qs of BIND(C) type at %L must have length one",
13915 if (c
->attr
.proc_pointer
&& c
->ts
.interface
)
13917 gfc_symbol
*ifc
= c
->ts
.interface
;
13919 if (!sym
->attr
.vtype
&& !check_proc_interface (ifc
, &c
->loc
))
13925 if (ifc
->attr
.if_source
|| ifc
->attr
.intrinsic
)
13927 /* Resolve interface and copy attributes. */
13928 if (ifc
->formal
&& !ifc
->formal_ns
)
13929 resolve_symbol (ifc
);
13930 if (ifc
->attr
.intrinsic
)
13931 gfc_resolve_intrinsic (ifc
, &ifc
->declared_at
);
13935 c
->ts
= ifc
->result
->ts
;
13936 c
->attr
.allocatable
= ifc
->result
->attr
.allocatable
;
13937 c
->attr
.pointer
= ifc
->result
->attr
.pointer
;
13938 c
->attr
.dimension
= ifc
->result
->attr
.dimension
;
13939 c
->as
= gfc_copy_array_spec (ifc
->result
->as
);
13940 c
->attr
.class_ok
= ifc
->result
->attr
.class_ok
;
13945 c
->attr
.allocatable
= ifc
->attr
.allocatable
;
13946 c
->attr
.pointer
= ifc
->attr
.pointer
;
13947 c
->attr
.dimension
= ifc
->attr
.dimension
;
13948 c
->as
= gfc_copy_array_spec (ifc
->as
);
13949 c
->attr
.class_ok
= ifc
->attr
.class_ok
;
13951 c
->ts
.interface
= ifc
;
13952 c
->attr
.function
= ifc
->attr
.function
;
13953 c
->attr
.subroutine
= ifc
->attr
.subroutine
;
13955 c
->attr
.pure
= ifc
->attr
.pure
;
13956 c
->attr
.elemental
= ifc
->attr
.elemental
;
13957 c
->attr
.recursive
= ifc
->attr
.recursive
;
13958 c
->attr
.always_explicit
= ifc
->attr
.always_explicit
;
13959 c
->attr
.ext_attr
|= ifc
->attr
.ext_attr
;
13960 /* Copy char length. */
13961 if (ifc
->ts
.type
== BT_CHARACTER
&& ifc
->ts
.u
.cl
)
13963 gfc_charlen
*cl
= gfc_new_charlen (sym
->ns
, ifc
->ts
.u
.cl
);
13964 if (cl
->length
&& !cl
->resolved
13965 && !gfc_resolve_expr (cl
->length
))
13974 else if (c
->attr
.proc_pointer
&& c
->ts
.type
== BT_UNKNOWN
)
13976 /* Since PPCs are not implicitly typed, a PPC without an explicit
13977 interface must be a subroutine. */
13978 gfc_add_subroutine (&c
->attr
, c
->name
, &c
->loc
);
13981 /* Procedure pointer components: Check PASS arg. */
13982 if (c
->attr
.proc_pointer
&& !c
->tb
->nopass
&& c
->tb
->pass_arg_num
== 0
13983 && !sym
->attr
.vtype
)
13985 gfc_symbol
* me_arg
;
13987 if (c
->tb
->pass_arg
)
13989 gfc_formal_arglist
* i
;
13991 /* If an explicit passing argument name is given, walk the arg-list
13992 and look for it. */
13995 c
->tb
->pass_arg_num
= 1;
13996 for (i
= c
->ts
.interface
->formal
; i
; i
= i
->next
)
13998 if (!strcmp (i
->sym
->name
, c
->tb
->pass_arg
))
14003 c
->tb
->pass_arg_num
++;
14008 gfc_error ("Procedure pointer component %qs with PASS(%s) "
14009 "at %L has no argument %qs", c
->name
,
14010 c
->tb
->pass_arg
, &c
->loc
, c
->tb
->pass_arg
);
14017 /* Otherwise, take the first one; there should in fact be at least
14019 c
->tb
->pass_arg_num
= 1;
14020 if (!c
->ts
.interface
->formal
)
14022 gfc_error ("Procedure pointer component %qs with PASS at %L "
14023 "must have at least one argument",
14028 me_arg
= c
->ts
.interface
->formal
->sym
;
14031 /* Now check that the argument-type matches. */
14032 gcc_assert (me_arg
);
14033 if ((me_arg
->ts
.type
!= BT_DERIVED
&& me_arg
->ts
.type
!= BT_CLASS
)
14034 || (me_arg
->ts
.type
== BT_DERIVED
&& me_arg
->ts
.u
.derived
!= sym
)
14035 || (me_arg
->ts
.type
== BT_CLASS
14036 && CLASS_DATA (me_arg
)->ts
.u
.derived
!= sym
))
14038 gfc_error ("Argument %qs of %qs with PASS(%s) at %L must be of"
14039 " the derived type %qs", me_arg
->name
, c
->name
,
14040 me_arg
->name
, &c
->loc
, sym
->name
);
14045 /* Check for F03:C453. */
14046 if (CLASS_DATA (me_arg
)->attr
.dimension
)
14048 gfc_error ("Argument %qs of %qs with PASS(%s) at %L "
14049 "must be scalar", me_arg
->name
, c
->name
, me_arg
->name
,
14055 if (CLASS_DATA (me_arg
)->attr
.class_pointer
)
14057 gfc_error ("Argument %qs of %qs with PASS(%s) at %L "
14058 "may not have the POINTER attribute", me_arg
->name
,
14059 c
->name
, me_arg
->name
, &c
->loc
);
14064 if (CLASS_DATA (me_arg
)->attr
.allocatable
)
14066 gfc_error ("Argument %qs of %qs with PASS(%s) at %L "
14067 "may not be ALLOCATABLE", me_arg
->name
, c
->name
,
14068 me_arg
->name
, &c
->loc
);
14073 if (gfc_type_is_extensible (sym
) && me_arg
->ts
.type
!= BT_CLASS
)
14075 gfc_error ("Non-polymorphic passed-object dummy argument of %qs"
14076 " at %L", c
->name
, &c
->loc
);
14082 /* Check type-spec if this is not the parent-type component. */
14083 if (((sym
->attr
.is_class
14084 && (!sym
->components
->ts
.u
.derived
->attr
.extension
14085 || c
!= sym
->components
->ts
.u
.derived
->components
))
14086 || (!sym
->attr
.is_class
14087 && (!sym
->attr
.extension
|| c
!= sym
->components
)))
14088 && !sym
->attr
.vtype
14089 && !resolve_typespec_used (&c
->ts
, &c
->loc
, c
->name
))
14092 super_type
= gfc_get_derived_super_type (sym
);
14094 /* If this type is an extension, set the accessibility of the parent
14097 && ((sym
->attr
.is_class
14098 && c
== sym
->components
->ts
.u
.derived
->components
)
14099 || (!sym
->attr
.is_class
&& c
== sym
->components
))
14100 && strcmp (super_type
->name
, c
->name
) == 0)
14101 c
->attr
.access
= super_type
->attr
.access
;
14103 /* If this type is an extension, see if this component has the same name
14104 as an inherited type-bound procedure. */
14105 if (super_type
&& !sym
->attr
.is_class
14106 && gfc_find_typebound_proc (super_type
, NULL
, c
->name
, true, NULL
))
14108 gfc_error ("Component %qs of %qs at %L has the same name as an"
14109 " inherited type-bound procedure",
14110 c
->name
, sym
->name
, &c
->loc
);
14114 if (c
->ts
.type
== BT_CHARACTER
&& !c
->attr
.proc_pointer
14115 && !c
->ts
.deferred
)
14117 if (c
->ts
.u
.cl
->length
== NULL
14118 || (!resolve_charlen(c
->ts
.u
.cl
))
14119 || !gfc_is_constant_expr (c
->ts
.u
.cl
->length
))
14121 gfc_error ("Character length of component %qs needs to "
14122 "be a constant specification expression at %L",
14124 c
->ts
.u
.cl
->length
? &c
->ts
.u
.cl
->length
->where
: &c
->loc
);
14129 if (c
->ts
.type
== BT_CHARACTER
&& c
->ts
.deferred
14130 && !c
->attr
.pointer
&& !c
->attr
.allocatable
)
14132 gfc_error ("Character component %qs of %qs at %L with deferred "
14133 "length must be a POINTER or ALLOCATABLE",
14134 c
->name
, sym
->name
, &c
->loc
);
14138 /* Add the hidden deferred length field. */
14139 if (c
->ts
.type
== BT_CHARACTER
14140 && (c
->ts
.deferred
|| c
->attr
.pdt_string
)
14141 && !c
->attr
.function
14142 && !sym
->attr
.is_class
)
14144 char name
[GFC_MAX_SYMBOL_LEN
+9];
14145 gfc_component
*strlen
;
14146 sprintf (name
, "_%s_length", c
->name
);
14147 strlen
= gfc_find_component (sym
, name
, true, true, NULL
);
14148 if (strlen
== NULL
)
14150 if (!gfc_add_component (sym
, name
, &strlen
))
14152 strlen
->ts
.type
= BT_INTEGER
;
14153 strlen
->ts
.kind
= gfc_charlen_int_kind
;
14154 strlen
->attr
.access
= ACCESS_PRIVATE
;
14155 strlen
->attr
.artificial
= 1;
14159 if (c
->ts
.type
== BT_DERIVED
14160 && sym
->component_access
!= ACCESS_PRIVATE
14161 && gfc_check_symbol_access (sym
)
14162 && !is_sym_host_assoc (c
->ts
.u
.derived
, sym
->ns
)
14163 && !c
->ts
.u
.derived
->attr
.use_assoc
14164 && !gfc_check_symbol_access (c
->ts
.u
.derived
)
14165 && !gfc_notify_std (GFC_STD_F2003
, "the component %qs is a "
14166 "PRIVATE type and cannot be a component of "
14167 "%qs, which is PUBLIC at %L", c
->name
,
14168 sym
->name
, &sym
->declared_at
))
14171 if ((sym
->attr
.sequence
|| sym
->attr
.is_bind_c
) && c
->ts
.type
== BT_CLASS
)
14173 gfc_error ("Polymorphic component %s at %L in SEQUENCE or BIND(C) "
14174 "type %s", c
->name
, &c
->loc
, sym
->name
);
14178 if (sym
->attr
.sequence
)
14180 if (c
->ts
.type
== BT_DERIVED
&& c
->ts
.u
.derived
->attr
.sequence
== 0)
14182 gfc_error ("Component %s of SEQUENCE type declared at %L does "
14183 "not have the SEQUENCE attribute",
14184 c
->ts
.u
.derived
->name
, &sym
->declared_at
);
14189 if (c
->ts
.type
== BT_DERIVED
&& c
->ts
.u
.derived
->attr
.generic
)
14190 c
->ts
.u
.derived
= gfc_find_dt_in_generic (c
->ts
.u
.derived
);
14191 else if (c
->ts
.type
== BT_CLASS
&& c
->attr
.class_ok
14192 && CLASS_DATA (c
)->ts
.u
.derived
->attr
.generic
)
14193 CLASS_DATA (c
)->ts
.u
.derived
14194 = gfc_find_dt_in_generic (CLASS_DATA (c
)->ts
.u
.derived
);
14196 /* If an allocatable component derived type is of the same type as
14197 the enclosing derived type, we need a vtable generating so that
14198 the __deallocate procedure is created. */
14199 if ((c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
14200 && c
->ts
.u
.derived
== sym
&& c
->attr
.allocatable
== 1)
14201 gfc_find_vtab (&c
->ts
);
14203 /* Ensure that all the derived type components are put on the
14204 derived type list; even in formal namespaces, where derived type
14205 pointer components might not have been declared. */
14206 if (c
->ts
.type
== BT_DERIVED
14208 && c
->ts
.u
.derived
->components
14210 && sym
!= c
->ts
.u
.derived
)
14211 add_dt_to_dt_list (c
->ts
.u
.derived
);
14213 if (!gfc_resolve_array_spec (c
->as
,
14214 !(c
->attr
.pointer
|| c
->attr
.proc_pointer
14215 || c
->attr
.allocatable
)))
14218 if (c
->initializer
&& !sym
->attr
.vtype
14219 && !c
->attr
.pdt_kind
&& !c
->attr
.pdt_len
14220 && !gfc_check_assign_symbol (sym
, c
, c
->initializer
))
14227 /* Be nice about the locus for a structure expression - show the locus of the
14228 first non-null sub-expression if we can. */
14231 cons_where (gfc_expr
*struct_expr
)
14233 gfc_constructor
*cons
;
14235 gcc_assert (struct_expr
&& struct_expr
->expr_type
== EXPR_STRUCTURE
);
14237 cons
= gfc_constructor_first (struct_expr
->value
.constructor
);
14238 for (; cons
; cons
= gfc_constructor_next (cons
))
14240 if (cons
->expr
&& cons
->expr
->expr_type
!= EXPR_NULL
)
14241 return &cons
->expr
->where
;
14244 return &struct_expr
->where
;
14247 /* Resolve the components of a structure type. Much less work than derived
14251 resolve_fl_struct (gfc_symbol
*sym
)
14254 gfc_expr
*init
= NULL
;
14257 /* Make sure UNIONs do not have overlapping initializers. */
14258 if (sym
->attr
.flavor
== FL_UNION
)
14260 for (c
= sym
->components
; c
; c
= c
->next
)
14262 if (init
&& c
->initializer
)
14264 gfc_error ("Conflicting initializers in union at %L and %L",
14265 cons_where (init
), cons_where (c
->initializer
));
14266 gfc_free_expr (c
->initializer
);
14267 c
->initializer
= NULL
;
14270 init
= c
->initializer
;
14275 for (c
= sym
->components
; c
; c
= c
->next
)
14276 if (!resolve_component (c
, sym
))
14282 if (sym
->components
)
14283 add_dt_to_dt_list (sym
);
14289 /* Resolve the components of a derived type. This does not have to wait until
14290 resolution stage, but can be done as soon as the dt declaration has been
14294 resolve_fl_derived0 (gfc_symbol
*sym
)
14296 gfc_symbol
* super_type
;
14298 gfc_formal_arglist
*f
;
14301 if (sym
->attr
.unlimited_polymorphic
)
14304 super_type
= gfc_get_derived_super_type (sym
);
14307 if (super_type
&& sym
->attr
.coarray_comp
&& !super_type
->attr
.coarray_comp
)
14309 gfc_error ("As extending type %qs at %L has a coarray component, "
14310 "parent type %qs shall also have one", sym
->name
,
14311 &sym
->declared_at
, super_type
->name
);
14315 /* Ensure the extended type gets resolved before we do. */
14316 if (super_type
&& !resolve_fl_derived0 (super_type
))
14319 /* An ABSTRACT type must be extensible. */
14320 if (sym
->attr
.abstract
&& !gfc_type_is_extensible (sym
))
14322 gfc_error ("Non-extensible derived-type %qs at %L must not be ABSTRACT",
14323 sym
->name
, &sym
->declared_at
);
14327 c
= (sym
->attr
.is_class
) ? sym
->components
->ts
.u
.derived
->components
14331 for ( ; c
!= NULL
; c
= c
->next
)
14332 if (!resolve_component (c
, sym
))
14338 /* Now add the caf token field, where needed. */
14339 if (flag_coarray
!= GFC_FCOARRAY_NONE
14340 && !sym
->attr
.is_class
&& !sym
->attr
.vtype
)
14342 for (c
= sym
->components
; c
; c
= c
->next
)
14343 if (!c
->attr
.dimension
&& !c
->attr
.codimension
14344 && (c
->attr
.allocatable
|| c
->attr
.pointer
))
14346 char name
[GFC_MAX_SYMBOL_LEN
+9];
14347 gfc_component
*token
;
14348 sprintf (name
, "_caf_%s", c
->name
);
14349 token
= gfc_find_component (sym
, name
, true, true, NULL
);
14352 if (!gfc_add_component (sym
, name
, &token
))
14354 token
->ts
.type
= BT_VOID
;
14355 token
->ts
.kind
= gfc_default_integer_kind
;
14356 token
->attr
.access
= ACCESS_PRIVATE
;
14357 token
->attr
.artificial
= 1;
14358 token
->attr
.caf_token
= 1;
14363 check_defined_assignments (sym
);
14365 if (!sym
->attr
.defined_assign_comp
&& super_type
)
14366 sym
->attr
.defined_assign_comp
14367 = super_type
->attr
.defined_assign_comp
;
14369 /* If this is a non-ABSTRACT type extending an ABSTRACT one, ensure that
14370 all DEFERRED bindings are overridden. */
14371 if (super_type
&& super_type
->attr
.abstract
&& !sym
->attr
.abstract
14372 && !sym
->attr
.is_class
14373 && !ensure_not_abstract (sym
, super_type
))
14376 /* Check that there is a component for every PDT parameter. */
14377 if (sym
->attr
.pdt_template
)
14379 for (f
= sym
->formal
; f
; f
= f
->next
)
14383 c
= gfc_find_component (sym
, f
->sym
->name
, true, true, NULL
);
14386 gfc_error ("Parameterized type %qs does not have a component "
14387 "corresponding to parameter %qs at %L", sym
->name
,
14388 f
->sym
->name
, &sym
->declared_at
);
14394 /* Add derived type to the derived type list. */
14395 add_dt_to_dt_list (sym
);
14401 /* The following procedure does the full resolution of a derived type,
14402 including resolution of all type-bound procedures (if present). In contrast
14403 to 'resolve_fl_derived0' this can only be done after the module has been
14404 parsed completely. */
14407 resolve_fl_derived (gfc_symbol
*sym
)
14409 gfc_symbol
*gen_dt
= NULL
;
14411 if (sym
->attr
.unlimited_polymorphic
)
14414 if (!sym
->attr
.is_class
)
14415 gfc_find_symbol (sym
->name
, sym
->ns
, 0, &gen_dt
);
14416 if (gen_dt
&& gen_dt
->generic
&& gen_dt
->generic
->next
14417 && (!gen_dt
->generic
->sym
->attr
.use_assoc
14418 || gen_dt
->generic
->sym
->module
!= gen_dt
->generic
->next
->sym
->module
)
14419 && !gfc_notify_std (GFC_STD_F2003
, "Generic name %qs of function "
14420 "%qs at %L being the same name as derived "
14421 "type at %L", sym
->name
,
14422 gen_dt
->generic
->sym
== sym
14423 ? gen_dt
->generic
->next
->sym
->name
14424 : gen_dt
->generic
->sym
->name
,
14425 gen_dt
->generic
->sym
== sym
14426 ? &gen_dt
->generic
->next
->sym
->declared_at
14427 : &gen_dt
->generic
->sym
->declared_at
,
14428 &sym
->declared_at
))
14431 if (sym
->components
== NULL
&& !sym
->attr
.zero_comp
&& !sym
->attr
.use_assoc
)
14433 gfc_error ("Derived type %qs at %L has not been declared",
14434 sym
->name
, &sym
->declared_at
);
14438 /* Resolve the finalizer procedures. */
14439 if (!gfc_resolve_finalizers (sym
, NULL
))
14442 if (sym
->attr
.is_class
&& sym
->ts
.u
.derived
== NULL
)
14444 /* Fix up incomplete CLASS symbols. */
14445 gfc_component
*data
= gfc_find_component (sym
, "_data", true, true, NULL
);
14446 gfc_component
*vptr
= gfc_find_component (sym
, "_vptr", true, true, NULL
);
14448 /* Nothing more to do for unlimited polymorphic entities. */
14449 if (data
->ts
.u
.derived
->attr
.unlimited_polymorphic
)
14451 else if (vptr
->ts
.u
.derived
== NULL
)
14453 gfc_symbol
*vtab
= gfc_find_derived_vtab (data
->ts
.u
.derived
);
14455 vptr
->ts
.u
.derived
= vtab
->ts
.u
.derived
;
14456 if (!resolve_fl_derived0 (vptr
->ts
.u
.derived
))
14461 if (!resolve_fl_derived0 (sym
))
14464 /* Resolve the type-bound procedures. */
14465 if (!resolve_typebound_procedures (sym
))
14468 /* Generate module vtables subject to their accessibility and their not
14469 being vtables or pdt templates. If this is not done class declarations
14470 in external procedures wind up with their own version and so SELECT TYPE
14471 fails because the vptrs do not have the same address. */
14472 if (gfc_option
.allow_std
& GFC_STD_F2003
14473 && sym
->ns
->proc_name
14474 && sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
14475 && sym
->attr
.access
!= ACCESS_PRIVATE
14476 && !(sym
->attr
.use_assoc
|| sym
->attr
.vtype
|| sym
->attr
.pdt_template
))
14478 gfc_symbol
*vtab
= gfc_find_derived_vtab (sym
);
14479 gfc_set_sym_referenced (vtab
);
14487 resolve_fl_namelist (gfc_symbol
*sym
)
14492 for (nl
= sym
->namelist
; nl
; nl
= nl
->next
)
14494 /* Check again, the check in match only works if NAMELIST comes
14496 if (nl
->sym
->as
&& nl
->sym
->as
->type
== AS_ASSUMED_SIZE
)
14498 gfc_error ("Assumed size array %qs in namelist %qs at %L is not "
14499 "allowed", nl
->sym
->name
, sym
->name
, &sym
->declared_at
);
14503 if (nl
->sym
->as
&& nl
->sym
->as
->type
== AS_ASSUMED_SHAPE
14504 && !gfc_notify_std (GFC_STD_F2003
, "NAMELIST array object %qs "
14505 "with assumed shape in namelist %qs at %L",
14506 nl
->sym
->name
, sym
->name
, &sym
->declared_at
))
14509 if (is_non_constant_shape_array (nl
->sym
)
14510 && !gfc_notify_std (GFC_STD_F2003
, "NAMELIST array object %qs "
14511 "with nonconstant shape in namelist %qs at %L",
14512 nl
->sym
->name
, sym
->name
, &sym
->declared_at
))
14515 if (nl
->sym
->ts
.type
== BT_CHARACTER
14516 && (nl
->sym
->ts
.u
.cl
->length
== NULL
14517 || !gfc_is_constant_expr (nl
->sym
->ts
.u
.cl
->length
))
14518 && !gfc_notify_std (GFC_STD_F2003
, "NAMELIST object %qs with "
14519 "nonconstant character length in "
14520 "namelist %qs at %L", nl
->sym
->name
,
14521 sym
->name
, &sym
->declared_at
))
14526 /* Reject PRIVATE objects in a PUBLIC namelist. */
14527 if (gfc_check_symbol_access (sym
))
14529 for (nl
= sym
->namelist
; nl
; nl
= nl
->next
)
14531 if (!nl
->sym
->attr
.use_assoc
14532 && !is_sym_host_assoc (nl
->sym
, sym
->ns
)
14533 && !gfc_check_symbol_access (nl
->sym
))
14535 gfc_error ("NAMELIST object %qs was declared PRIVATE and "
14536 "cannot be member of PUBLIC namelist %qs at %L",
14537 nl
->sym
->name
, sym
->name
, &sym
->declared_at
);
14541 if (nl
->sym
->ts
.type
== BT_DERIVED
14542 && (nl
->sym
->ts
.u
.derived
->attr
.alloc_comp
14543 || nl
->sym
->ts
.u
.derived
->attr
.pointer_comp
))
14545 if (!gfc_notify_std (GFC_STD_F2003
, "NAMELIST object %qs in "
14546 "namelist %qs at %L with ALLOCATABLE "
14547 "or POINTER components", nl
->sym
->name
,
14548 sym
->name
, &sym
->declared_at
))
14553 /* Types with private components that came here by USE-association. */
14554 if (nl
->sym
->ts
.type
== BT_DERIVED
14555 && derived_inaccessible (nl
->sym
->ts
.u
.derived
))
14557 gfc_error ("NAMELIST object %qs has use-associated PRIVATE "
14558 "components and cannot be member of namelist %qs at %L",
14559 nl
->sym
->name
, sym
->name
, &sym
->declared_at
);
14563 /* Types with private components that are defined in the same module. */
14564 if (nl
->sym
->ts
.type
== BT_DERIVED
14565 && !is_sym_host_assoc (nl
->sym
->ts
.u
.derived
, sym
->ns
)
14566 && nl
->sym
->ts
.u
.derived
->attr
.private_comp
)
14568 gfc_error ("NAMELIST object %qs has PRIVATE components and "
14569 "cannot be a member of PUBLIC namelist %qs at %L",
14570 nl
->sym
->name
, sym
->name
, &sym
->declared_at
);
14577 /* 14.1.2 A module or internal procedure represent local entities
14578 of the same type as a namelist member and so are not allowed. */
14579 for (nl
= sym
->namelist
; nl
; nl
= nl
->next
)
14581 if (nl
->sym
->ts
.kind
!= 0 && nl
->sym
->attr
.flavor
== FL_VARIABLE
)
14584 if (nl
->sym
->attr
.function
&& nl
->sym
== nl
->sym
->result
)
14585 if ((nl
->sym
== sym
->ns
->proc_name
)
14587 (sym
->ns
->parent
&& nl
->sym
== sym
->ns
->parent
->proc_name
))
14592 gfc_find_symbol (nl
->sym
->name
, sym
->ns
, 1, &nlsym
);
14593 if (nlsym
&& nlsym
->attr
.flavor
== FL_PROCEDURE
)
14595 gfc_error ("PROCEDURE attribute conflicts with NAMELIST "
14596 "attribute in %qs at %L", nlsym
->name
,
14597 &sym
->declared_at
);
14604 for (nl
= sym
->namelist
; nl
; nl
= nl
->next
)
14605 nl
->sym
->attr
.asynchronous
= 1;
14612 resolve_fl_parameter (gfc_symbol
*sym
)
14614 /* A parameter array's shape needs to be constant. */
14615 if (sym
->as
!= NULL
14616 && (sym
->as
->type
== AS_DEFERRED
14617 || is_non_constant_shape_array (sym
)))
14619 gfc_error ("Parameter array %qs at %L cannot be automatic "
14620 "or of deferred shape", sym
->name
, &sym
->declared_at
);
14624 /* Constraints on deferred type parameter. */
14625 if (!deferred_requirements (sym
))
14628 /* Make sure a parameter that has been implicitly typed still
14629 matches the implicit type, since PARAMETER statements can precede
14630 IMPLICIT statements. */
14631 if (sym
->attr
.implicit_type
14632 && !gfc_compare_types (&sym
->ts
, gfc_get_default_type (sym
->name
,
14635 gfc_error ("Implicitly typed PARAMETER %qs at %L doesn't match a "
14636 "later IMPLICIT type", sym
->name
, &sym
->declared_at
);
14640 /* Make sure the types of derived parameters are consistent. This
14641 type checking is deferred until resolution because the type may
14642 refer to a derived type from the host. */
14643 if (sym
->ts
.type
== BT_DERIVED
14644 && !gfc_compare_types (&sym
->ts
, &sym
->value
->ts
))
14646 gfc_error ("Incompatible derived type in PARAMETER at %L",
14647 &sym
->value
->where
);
14651 /* F03:C509,C514. */
14652 if (sym
->ts
.type
== BT_CLASS
)
14654 gfc_error ("CLASS variable %qs at %L cannot have the PARAMETER attribute",
14655 sym
->name
, &sym
->declared_at
);
14663 /* Called by resolve_symbol to check PDTs. */
14666 resolve_pdt (gfc_symbol
* sym
)
14668 gfc_symbol
*derived
= NULL
;
14669 gfc_actual_arglist
*param
;
14671 bool const_len_exprs
= true;
14672 bool assumed_len_exprs
= false;
14673 symbol_attribute
*attr
;
14675 if (sym
->ts
.type
== BT_DERIVED
)
14677 derived
= sym
->ts
.u
.derived
;
14678 attr
= &(sym
->attr
);
14680 else if (sym
->ts
.type
== BT_CLASS
)
14682 derived
= CLASS_DATA (sym
)->ts
.u
.derived
;
14683 attr
= &(CLASS_DATA (sym
)->attr
);
14686 gcc_unreachable ();
14688 gcc_assert (derived
->attr
.pdt_type
);
14690 for (param
= sym
->param_list
; param
; param
= param
->next
)
14692 c
= gfc_find_component (derived
, param
->name
, false, true, NULL
);
14694 if (c
->attr
.pdt_kind
)
14697 if (param
->expr
&& !gfc_is_constant_expr (param
->expr
)
14698 && c
->attr
.pdt_len
)
14699 const_len_exprs
= false;
14700 else if (param
->spec_type
== SPEC_ASSUMED
)
14701 assumed_len_exprs
= true;
14703 if (param
->spec_type
== SPEC_DEFERRED
14704 && !attr
->allocatable
&& !attr
->pointer
)
14705 gfc_error ("The object %qs at %L has a deferred LEN "
14706 "parameter %qs and is neither allocatable "
14707 "nor a pointer", sym
->name
, &sym
->declared_at
,
14712 if (!const_len_exprs
14713 && (sym
->ns
->proc_name
->attr
.is_main_program
14714 || sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
14715 || sym
->attr
.save
!= SAVE_NONE
))
14716 gfc_error ("The AUTOMATIC object %qs at %L must not have the "
14717 "SAVE attribute or be a variable declared in the "
14718 "main program, a module or a submodule(F08/C513)",
14719 sym
->name
, &sym
->declared_at
);
14721 if (assumed_len_exprs
&& !(sym
->attr
.dummy
14722 || sym
->attr
.select_type_temporary
|| sym
->attr
.associate_var
))
14723 gfc_error ("The object %qs at %L with ASSUMED type parameters "
14724 "must be a dummy or a SELECT TYPE selector(F08/4.2)",
14725 sym
->name
, &sym
->declared_at
);
14729 /* Do anything necessary to resolve a symbol. Right now, we just
14730 assume that an otherwise unknown symbol is a variable. This sort
14731 of thing commonly happens for symbols in module. */
14734 resolve_symbol (gfc_symbol
*sym
)
14736 int check_constant
, mp_flag
;
14737 gfc_symtree
*symtree
;
14738 gfc_symtree
*this_symtree
;
14741 symbol_attribute class_attr
;
14742 gfc_array_spec
*as
;
14743 bool saved_specification_expr
;
14749 /* No symbol will ever have union type; only components can be unions.
14750 Union type declaration symbols have type BT_UNKNOWN but flavor FL_UNION
14751 (just like derived type declaration symbols have flavor FL_DERIVED). */
14752 gcc_assert (sym
->ts
.type
!= BT_UNION
);
14754 /* Coarrayed polymorphic objects with allocatable or pointer components are
14755 yet unsupported for -fcoarray=lib. */
14756 if (flag_coarray
== GFC_FCOARRAY_LIB
&& sym
->ts
.type
== BT_CLASS
14757 && sym
->ts
.u
.derived
&& CLASS_DATA (sym
)
14758 && CLASS_DATA (sym
)->attr
.codimension
14759 && (CLASS_DATA (sym
)->ts
.u
.derived
->attr
.alloc_comp
14760 || CLASS_DATA (sym
)->ts
.u
.derived
->attr
.pointer_comp
))
14762 gfc_error ("Sorry, allocatable/pointer components in polymorphic (CLASS) "
14763 "type coarrays at %L are unsupported", &sym
->declared_at
);
14767 if (sym
->attr
.artificial
)
14770 if (sym
->attr
.unlimited_polymorphic
)
14773 if (sym
->attr
.flavor
== FL_UNKNOWN
14774 || (sym
->attr
.flavor
== FL_PROCEDURE
&& !sym
->attr
.intrinsic
14775 && !sym
->attr
.generic
&& !sym
->attr
.external
14776 && sym
->attr
.if_source
== IFSRC_UNKNOWN
14777 && sym
->ts
.type
== BT_UNKNOWN
))
14780 /* If we find that a flavorless symbol is an interface in one of the
14781 parent namespaces, find its symtree in this namespace, free the
14782 symbol and set the symtree to point to the interface symbol. */
14783 for (ns
= gfc_current_ns
->parent
; ns
; ns
= ns
->parent
)
14785 symtree
= gfc_find_symtree (ns
->sym_root
, sym
->name
);
14786 if (symtree
&& (symtree
->n
.sym
->generic
||
14787 (symtree
->n
.sym
->attr
.flavor
== FL_PROCEDURE
14788 && sym
->ns
->construct_entities
)))
14790 this_symtree
= gfc_find_symtree (gfc_current_ns
->sym_root
,
14792 if (this_symtree
->n
.sym
== sym
)
14794 symtree
->n
.sym
->refs
++;
14795 gfc_release_symbol (sym
);
14796 this_symtree
->n
.sym
= symtree
->n
.sym
;
14802 /* Otherwise give it a flavor according to such attributes as
14804 if (sym
->attr
.flavor
== FL_UNKNOWN
&& sym
->attr
.external
== 0
14805 && sym
->attr
.intrinsic
== 0)
14806 sym
->attr
.flavor
= FL_VARIABLE
;
14807 else if (sym
->attr
.flavor
== FL_UNKNOWN
)
14809 sym
->attr
.flavor
= FL_PROCEDURE
;
14810 if (sym
->attr
.dimension
)
14811 sym
->attr
.function
= 1;
14815 if (sym
->attr
.external
&& sym
->ts
.type
!= BT_UNKNOWN
&& !sym
->attr
.function
)
14816 gfc_add_function (&sym
->attr
, sym
->name
, &sym
->declared_at
);
14818 if (sym
->attr
.procedure
&& sym
->attr
.if_source
!= IFSRC_DECL
14819 && !resolve_procedure_interface (sym
))
14822 if (sym
->attr
.is_protected
&& !sym
->attr
.proc_pointer
14823 && (sym
->attr
.procedure
|| sym
->attr
.external
))
14825 if (sym
->attr
.external
)
14826 gfc_error ("PROTECTED attribute conflicts with EXTERNAL attribute "
14827 "at %L", &sym
->declared_at
);
14829 gfc_error ("PROCEDURE attribute conflicts with PROTECTED attribute "
14830 "at %L", &sym
->declared_at
);
14835 if (sym
->attr
.flavor
== FL_DERIVED
&& !resolve_fl_derived (sym
))
14838 else if ((sym
->attr
.flavor
== FL_STRUCT
|| sym
->attr
.flavor
== FL_UNION
)
14839 && !resolve_fl_struct (sym
))
14842 /* Symbols that are module procedures with results (functions) have
14843 the types and array specification copied for type checking in
14844 procedures that call them, as well as for saving to a module
14845 file. These symbols can't stand the scrutiny that their results
14847 mp_flag
= (sym
->result
!= NULL
&& sym
->result
!= sym
);
14849 /* Make sure that the intrinsic is consistent with its internal
14850 representation. This needs to be done before assigning a default
14851 type to avoid spurious warnings. */
14852 if (sym
->attr
.flavor
!= FL_MODULE
&& sym
->attr
.intrinsic
14853 && !gfc_resolve_intrinsic (sym
, &sym
->declared_at
))
14856 /* Resolve associate names. */
14858 resolve_assoc_var (sym
, true);
14860 /* Assign default type to symbols that need one and don't have one. */
14861 if (sym
->ts
.type
== BT_UNKNOWN
)
14863 if (sym
->attr
.flavor
== FL_VARIABLE
|| sym
->attr
.flavor
== FL_PARAMETER
)
14865 gfc_set_default_type (sym
, 1, NULL
);
14868 if (sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.external
14869 && !sym
->attr
.function
&& !sym
->attr
.subroutine
14870 && gfc_get_default_type (sym
->name
, sym
->ns
)->type
== BT_UNKNOWN
)
14871 gfc_add_subroutine (&sym
->attr
, sym
->name
, &sym
->declared_at
);
14873 if (sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.function
)
14875 /* The specific case of an external procedure should emit an error
14876 in the case that there is no implicit type. */
14879 if (!sym
->attr
.mixed_entry_master
)
14880 gfc_set_default_type (sym
, sym
->attr
.external
, NULL
);
14884 /* Result may be in another namespace. */
14885 resolve_symbol (sym
->result
);
14887 if (!sym
->result
->attr
.proc_pointer
)
14889 sym
->ts
= sym
->result
->ts
;
14890 sym
->as
= gfc_copy_array_spec (sym
->result
->as
);
14891 sym
->attr
.dimension
= sym
->result
->attr
.dimension
;
14892 sym
->attr
.pointer
= sym
->result
->attr
.pointer
;
14893 sym
->attr
.allocatable
= sym
->result
->attr
.allocatable
;
14894 sym
->attr
.contiguous
= sym
->result
->attr
.contiguous
;
14899 else if (mp_flag
&& sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.function
)
14901 bool saved_specification_expr
= specification_expr
;
14902 specification_expr
= true;
14903 gfc_resolve_array_spec (sym
->result
->as
, false);
14904 specification_expr
= saved_specification_expr
;
14907 if (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
)
14909 as
= CLASS_DATA (sym
)->as
;
14910 class_attr
= CLASS_DATA (sym
)->attr
;
14911 class_attr
.pointer
= class_attr
.class_pointer
;
14915 class_attr
= sym
->attr
;
14920 if (sym
->attr
.contiguous
14921 && (!class_attr
.dimension
14922 || (as
->type
!= AS_ASSUMED_SHAPE
&& as
->type
!= AS_ASSUMED_RANK
14923 && !class_attr
.pointer
)))
14925 gfc_error ("%qs at %L has the CONTIGUOUS attribute but is not an "
14926 "array pointer or an assumed-shape or assumed-rank array",
14927 sym
->name
, &sym
->declared_at
);
14931 /* Assumed size arrays and assumed shape arrays must be dummy
14932 arguments. Array-spec's of implied-shape should have been resolved to
14933 AS_EXPLICIT already. */
14937 /* If AS_IMPLIED_SHAPE makes it to here, it must be a bad
14938 specification expression. */
14939 if (as
->type
== AS_IMPLIED_SHAPE
)
14942 for (i
=0; i
<as
->rank
; i
++)
14944 if (as
->lower
[i
] != NULL
&& as
->upper
[i
] == NULL
)
14946 gfc_error ("Bad specification for assumed size array at %L",
14947 &as
->lower
[i
]->where
);
14954 if (((as
->type
== AS_ASSUMED_SIZE
&& !as
->cp_was_assumed
)
14955 || as
->type
== AS_ASSUMED_SHAPE
)
14956 && !sym
->attr
.dummy
&& !sym
->attr
.select_type_temporary
)
14958 if (as
->type
== AS_ASSUMED_SIZE
)
14959 gfc_error ("Assumed size array at %L must be a dummy argument",
14960 &sym
->declared_at
);
14962 gfc_error ("Assumed shape array at %L must be a dummy argument",
14963 &sym
->declared_at
);
14966 /* TS 29113, C535a. */
14967 if (as
->type
== AS_ASSUMED_RANK
&& !sym
->attr
.dummy
14968 && !sym
->attr
.select_type_temporary
)
14970 gfc_error ("Assumed-rank array at %L must be a dummy argument",
14971 &sym
->declared_at
);
14974 if (as
->type
== AS_ASSUMED_RANK
14975 && (sym
->attr
.codimension
|| sym
->attr
.value
))
14977 gfc_error ("Assumed-rank array at %L may not have the VALUE or "
14978 "CODIMENSION attribute", &sym
->declared_at
);
14983 /* Make sure symbols with known intent or optional are really dummy
14984 variable. Because of ENTRY statement, this has to be deferred
14985 until resolution time. */
14987 if (!sym
->attr
.dummy
14988 && (sym
->attr
.optional
|| sym
->attr
.intent
!= INTENT_UNKNOWN
))
14990 gfc_error ("Symbol at %L is not a DUMMY variable", &sym
->declared_at
);
14994 if (sym
->attr
.value
&& !sym
->attr
.dummy
)
14996 gfc_error ("%qs at %L cannot have the VALUE attribute because "
14997 "it is not a dummy argument", sym
->name
, &sym
->declared_at
);
15001 if (sym
->attr
.value
&& sym
->ts
.type
== BT_CHARACTER
)
15003 gfc_charlen
*cl
= sym
->ts
.u
.cl
;
15004 if (!cl
|| !cl
->length
|| cl
->length
->expr_type
!= EXPR_CONSTANT
)
15006 gfc_error ("Character dummy variable %qs at %L with VALUE "
15007 "attribute must have constant length",
15008 sym
->name
, &sym
->declared_at
);
15012 if (sym
->ts
.is_c_interop
15013 && mpz_cmp_si (cl
->length
->value
.integer
, 1) != 0)
15015 gfc_error ("C interoperable character dummy variable %qs at %L "
15016 "with VALUE attribute must have length one",
15017 sym
->name
, &sym
->declared_at
);
15022 if (sym
->ts
.type
== BT_DERIVED
&& !sym
->attr
.is_iso_c
15023 && sym
->ts
.u
.derived
->attr
.generic
)
15025 sym
->ts
.u
.derived
= gfc_find_dt_in_generic (sym
->ts
.u
.derived
);
15026 if (!sym
->ts
.u
.derived
)
15028 gfc_error ("The derived type %qs at %L is of type %qs, "
15029 "which has not been defined", sym
->name
,
15030 &sym
->declared_at
, sym
->ts
.u
.derived
->name
);
15031 sym
->ts
.type
= BT_UNKNOWN
;
15036 /* Use the same constraints as TYPE(*), except for the type check
15037 and that only scalars and assumed-size arrays are permitted. */
15038 if (sym
->attr
.ext_attr
& (1 << EXT_ATTR_NO_ARG_CHECK
))
15040 if (!sym
->attr
.dummy
)
15042 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute shall be "
15043 "a dummy argument", sym
->name
, &sym
->declared_at
);
15047 if (sym
->ts
.type
!= BT_ASSUMED
&& sym
->ts
.type
!= BT_INTEGER
15048 && sym
->ts
.type
!= BT_REAL
&& sym
->ts
.type
!= BT_LOGICAL
15049 && sym
->ts
.type
!= BT_COMPLEX
)
15051 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute shall be "
15052 "of type TYPE(*) or of an numeric intrinsic type",
15053 sym
->name
, &sym
->declared_at
);
15057 if (sym
->attr
.allocatable
|| sym
->attr
.codimension
15058 || sym
->attr
.pointer
|| sym
->attr
.value
)
15060 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute may not "
15061 "have the ALLOCATABLE, CODIMENSION, POINTER or VALUE "
15062 "attribute", sym
->name
, &sym
->declared_at
);
15066 if (sym
->attr
.intent
== INTENT_OUT
)
15068 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute may not "
15069 "have the INTENT(OUT) attribute",
15070 sym
->name
, &sym
->declared_at
);
15073 if (sym
->attr
.dimension
&& sym
->as
->type
!= AS_ASSUMED_SIZE
)
15075 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute shall "
15076 "either be a scalar or an assumed-size array",
15077 sym
->name
, &sym
->declared_at
);
15081 /* Set the type to TYPE(*) and add a dimension(*) to ensure
15082 NO_ARG_CHECK is correctly handled in trans*.c, e.g. with
15084 sym
->ts
.type
= BT_ASSUMED
;
15085 sym
->as
= gfc_get_array_spec ();
15086 sym
->as
->type
= AS_ASSUMED_SIZE
;
15088 sym
->as
->lower
[0] = gfc_get_int_expr (gfc_default_integer_kind
, NULL
, 1);
15090 else if (sym
->ts
.type
== BT_ASSUMED
)
15092 /* TS 29113, C407a. */
15093 if (!sym
->attr
.dummy
)
15095 gfc_error ("Assumed type of variable %s at %L is only permitted "
15096 "for dummy variables", sym
->name
, &sym
->declared_at
);
15099 if (sym
->attr
.allocatable
|| sym
->attr
.codimension
15100 || sym
->attr
.pointer
|| sym
->attr
.value
)
15102 gfc_error ("Assumed-type variable %s at %L may not have the "
15103 "ALLOCATABLE, CODIMENSION, POINTER or VALUE attribute",
15104 sym
->name
, &sym
->declared_at
);
15107 if (sym
->attr
.intent
== INTENT_OUT
)
15109 gfc_error ("Assumed-type variable %s at %L may not have the "
15110 "INTENT(OUT) attribute",
15111 sym
->name
, &sym
->declared_at
);
15114 if (sym
->attr
.dimension
&& sym
->as
->type
== AS_EXPLICIT
)
15116 gfc_error ("Assumed-type variable %s at %L shall not be an "
15117 "explicit-shape array", sym
->name
, &sym
->declared_at
);
15122 /* If the symbol is marked as bind(c), that it is declared at module level
15123 scope and verify its type and kind. Do not do the latter for symbols
15124 that are implicitly typed because that is handled in
15125 gfc_set_default_type. Handle dummy arguments and procedure definitions
15126 separately. Also, anything that is use associated is not handled here
15127 but instead is handled in the module it is declared in. Finally, derived
15128 type definitions are allowed to be BIND(C) since that only implies that
15129 they're interoperable, and they are checked fully for interoperability
15130 when a variable is declared of that type. */
15131 if (sym
->attr
.is_bind_c
&& sym
->attr
.use_assoc
== 0
15132 && sym
->attr
.dummy
== 0 && sym
->attr
.flavor
!= FL_PROCEDURE
15133 && sym
->attr
.flavor
!= FL_DERIVED
)
15137 /* First, make sure the variable is declared at the
15138 module-level scope (J3/04-007, Section 15.3). */
15139 if (sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
&&
15140 sym
->attr
.in_common
== 0)
15142 gfc_error ("Variable %qs at %L cannot be BIND(C) because it "
15143 "is neither a COMMON block nor declared at the "
15144 "module level scope", sym
->name
, &(sym
->declared_at
));
15147 else if (sym
->ts
.type
== BT_CHARACTER
15148 && (sym
->ts
.u
.cl
== NULL
|| sym
->ts
.u
.cl
->length
== NULL
15149 || !gfc_is_constant_expr (sym
->ts
.u
.cl
->length
)
15150 || mpz_cmp_si (sym
->ts
.u
.cl
->length
->value
.integer
, 1) != 0))
15152 gfc_error ("BIND(C) Variable %qs at %L must have length one",
15153 sym
->name
, &sym
->declared_at
);
15156 else if (sym
->common_head
!= NULL
&& sym
->attr
.implicit_type
== 0)
15158 t
= verify_com_block_vars_c_interop (sym
->common_head
);
15160 else if (sym
->attr
.implicit_type
== 0)
15162 /* If type() declaration, we need to verify that the components
15163 of the given type are all C interoperable, etc. */
15164 if (sym
->ts
.type
== BT_DERIVED
&&
15165 sym
->ts
.u
.derived
->attr
.is_c_interop
!= 1)
15167 /* Make sure the user marked the derived type as BIND(C). If
15168 not, call the verify routine. This could print an error
15169 for the derived type more than once if multiple variables
15170 of that type are declared. */
15171 if (sym
->ts
.u
.derived
->attr
.is_bind_c
!= 1)
15172 verify_bind_c_derived_type (sym
->ts
.u
.derived
);
15176 /* Verify the variable itself as C interoperable if it
15177 is BIND(C). It is not possible for this to succeed if
15178 the verify_bind_c_derived_type failed, so don't have to handle
15179 any error returned by verify_bind_c_derived_type. */
15180 t
= verify_bind_c_sym (sym
, &(sym
->ts
), sym
->attr
.in_common
,
15181 sym
->common_block
);
15186 /* clear the is_bind_c flag to prevent reporting errors more than
15187 once if something failed. */
15188 sym
->attr
.is_bind_c
= 0;
15193 /* If a derived type symbol has reached this point, without its
15194 type being declared, we have an error. Notice that most
15195 conditions that produce undefined derived types have already
15196 been dealt with. However, the likes of:
15197 implicit type(t) (t) ..... call foo (t) will get us here if
15198 the type is not declared in the scope of the implicit
15199 statement. Change the type to BT_UNKNOWN, both because it is so
15200 and to prevent an ICE. */
15201 if (sym
->ts
.type
== BT_DERIVED
&& !sym
->attr
.is_iso_c
15202 && sym
->ts
.u
.derived
->components
== NULL
15203 && !sym
->ts
.u
.derived
->attr
.zero_comp
)
15205 gfc_error ("The derived type %qs at %L is of type %qs, "
15206 "which has not been defined", sym
->name
,
15207 &sym
->declared_at
, sym
->ts
.u
.derived
->name
);
15208 sym
->ts
.type
= BT_UNKNOWN
;
15212 /* Make sure that the derived type has been resolved and that the
15213 derived type is visible in the symbol's namespace, if it is a
15214 module function and is not PRIVATE. */
15215 if (sym
->ts
.type
== BT_DERIVED
15216 && sym
->ts
.u
.derived
->attr
.use_assoc
15217 && sym
->ns
->proc_name
15218 && sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
15219 && !resolve_fl_derived (sym
->ts
.u
.derived
))
15222 /* Unless the derived-type declaration is use associated, Fortran 95
15223 does not allow public entries of private derived types.
15224 See 4.4.1 (F95) and 4.5.1.1 (F2003); and related interpretation
15225 161 in 95-006r3. */
15226 if (sym
->ts
.type
== BT_DERIVED
15227 && sym
->ns
->proc_name
&& sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
15228 && !sym
->ts
.u
.derived
->attr
.use_assoc
15229 && gfc_check_symbol_access (sym
)
15230 && !gfc_check_symbol_access (sym
->ts
.u
.derived
)
15231 && !gfc_notify_std (GFC_STD_F2003
, "PUBLIC %s %qs at %L of PRIVATE "
15232 "derived type %qs",
15233 (sym
->attr
.flavor
== FL_PARAMETER
)
15234 ? "parameter" : "variable",
15235 sym
->name
, &sym
->declared_at
,
15236 sym
->ts
.u
.derived
->name
))
15239 /* F2008, C1302. */
15240 if (sym
->ts
.type
== BT_DERIVED
15241 && ((sym
->ts
.u
.derived
->from_intmod
== INTMOD_ISO_FORTRAN_ENV
15242 && sym
->ts
.u
.derived
->intmod_sym_id
== ISOFORTRAN_LOCK_TYPE
)
15243 || sym
->ts
.u
.derived
->attr
.lock_comp
)
15244 && !sym
->attr
.codimension
&& !sym
->ts
.u
.derived
->attr
.coarray_comp
)
15246 gfc_error ("Variable %s at %L of type LOCK_TYPE or with subcomponent of "
15247 "type LOCK_TYPE must be a coarray", sym
->name
,
15248 &sym
->declared_at
);
15252 /* TS18508, C702/C703. */
15253 if (sym
->ts
.type
== BT_DERIVED
15254 && ((sym
->ts
.u
.derived
->from_intmod
== INTMOD_ISO_FORTRAN_ENV
15255 && sym
->ts
.u
.derived
->intmod_sym_id
== ISOFORTRAN_EVENT_TYPE
)
15256 || sym
->ts
.u
.derived
->attr
.event_comp
)
15257 && !sym
->attr
.codimension
&& !sym
->ts
.u
.derived
->attr
.coarray_comp
)
15259 gfc_error ("Variable %s at %L of type EVENT_TYPE or with subcomponent of "
15260 "type EVENT_TYPE must be a coarray", sym
->name
,
15261 &sym
->declared_at
);
15265 /* An assumed-size array with INTENT(OUT) shall not be of a type for which
15266 default initialization is defined (5.1.2.4.4). */
15267 if (sym
->ts
.type
== BT_DERIVED
15269 && sym
->attr
.intent
== INTENT_OUT
15271 && sym
->as
->type
== AS_ASSUMED_SIZE
)
15273 for (c
= sym
->ts
.u
.derived
->components
; c
; c
= c
->next
)
15275 if (c
->initializer
)
15277 gfc_error ("The INTENT(OUT) dummy argument %qs at %L is "
15278 "ASSUMED SIZE and so cannot have a default initializer",
15279 sym
->name
, &sym
->declared_at
);
15286 if (sym
->ts
.type
== BT_DERIVED
&& sym
->attr
.dummy
15287 && sym
->attr
.intent
== INTENT_OUT
&& sym
->attr
.lock_comp
)
15289 gfc_error ("Dummy argument %qs at %L of LOCK_TYPE shall not be "
15290 "INTENT(OUT)", sym
->name
, &sym
->declared_at
);
15295 if (sym
->ts
.type
== BT_DERIVED
&& sym
->attr
.dummy
15296 && sym
->attr
.intent
== INTENT_OUT
&& sym
->attr
.event_comp
)
15298 gfc_error ("Dummy argument %qs at %L of EVENT_TYPE shall not be "
15299 "INTENT(OUT)", sym
->name
, &sym
->declared_at
);
15304 if ((((sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
->attr
.coarray_comp
)
15305 || (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
15306 && CLASS_DATA (sym
)->attr
.coarray_comp
))
15307 || class_attr
.codimension
)
15308 && (sym
->attr
.result
|| sym
->result
== sym
))
15310 gfc_error ("Function result %qs at %L shall not be a coarray or have "
15311 "a coarray component", sym
->name
, &sym
->declared_at
);
15316 if (sym
->attr
.codimension
&& sym
->ts
.type
== BT_DERIVED
15317 && sym
->ts
.u
.derived
->ts
.is_iso_c
)
15319 gfc_error ("Variable %qs at %L of TYPE(C_PTR) or TYPE(C_FUNPTR) "
15320 "shall not be a coarray", sym
->name
, &sym
->declared_at
);
15325 if (((sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
->attr
.coarray_comp
)
15326 || (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
15327 && CLASS_DATA (sym
)->attr
.coarray_comp
))
15328 && (class_attr
.codimension
|| class_attr
.pointer
|| class_attr
.dimension
15329 || class_attr
.allocatable
))
15331 gfc_error ("Variable %qs at %L with coarray component shall be a "
15332 "nonpointer, nonallocatable scalar, which is not a coarray",
15333 sym
->name
, &sym
->declared_at
);
15337 /* F2008, C526. The function-result case was handled above. */
15338 if (class_attr
.codimension
15339 && !(class_attr
.allocatable
|| sym
->attr
.dummy
|| sym
->attr
.save
15340 || sym
->attr
.select_type_temporary
15341 || sym
->attr
.associate_var
15342 || (sym
->ns
->save_all
&& !sym
->attr
.automatic
)
15343 || sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
15344 || sym
->ns
->proc_name
->attr
.is_main_program
15345 || sym
->attr
.function
|| sym
->attr
.result
|| sym
->attr
.use_assoc
))
15347 gfc_error ("Variable %qs at %L is a coarray and is not ALLOCATABLE, SAVE "
15348 "nor a dummy argument", sym
->name
, &sym
->declared_at
);
15352 else if (class_attr
.codimension
&& !sym
->attr
.select_type_temporary
15353 && !class_attr
.allocatable
&& as
&& as
->cotype
== AS_DEFERRED
)
15355 gfc_error ("Coarray variable %qs at %L shall not have codimensions with "
15356 "deferred shape", sym
->name
, &sym
->declared_at
);
15359 else if (class_attr
.codimension
&& class_attr
.allocatable
&& as
15360 && (as
->cotype
!= AS_DEFERRED
|| as
->type
!= AS_DEFERRED
))
15362 gfc_error ("Allocatable coarray variable %qs at %L must have "
15363 "deferred shape", sym
->name
, &sym
->declared_at
);
15368 if ((((sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
->attr
.coarray_comp
)
15369 || (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
15370 && CLASS_DATA (sym
)->attr
.coarray_comp
))
15371 || (class_attr
.codimension
&& class_attr
.allocatable
))
15372 && sym
->attr
.dummy
&& sym
->attr
.intent
== INTENT_OUT
)
15374 gfc_error ("Variable %qs at %L is INTENT(OUT) and can thus not be an "
15375 "allocatable coarray or have coarray components",
15376 sym
->name
, &sym
->declared_at
);
15380 if (class_attr
.codimension
&& sym
->attr
.dummy
15381 && sym
->ns
->proc_name
&& sym
->ns
->proc_name
->attr
.is_bind_c
)
15383 gfc_error ("Coarray dummy variable %qs at %L not allowed in BIND(C) "
15384 "procedure %qs", sym
->name
, &sym
->declared_at
,
15385 sym
->ns
->proc_name
->name
);
15389 if (sym
->ts
.type
== BT_LOGICAL
15390 && ((sym
->attr
.function
&& sym
->attr
.is_bind_c
&& sym
->result
== sym
)
15391 || ((sym
->attr
.dummy
|| sym
->attr
.result
) && sym
->ns
->proc_name
15392 && sym
->ns
->proc_name
->attr
.is_bind_c
)))
15395 for (i
= 0; gfc_logical_kinds
[i
].kind
; i
++)
15396 if (gfc_logical_kinds
[i
].kind
== sym
->ts
.kind
)
15398 if (!gfc_logical_kinds
[i
].c_bool
&& sym
->attr
.dummy
15399 && !gfc_notify_std (GFC_STD_GNU
, "LOGICAL dummy argument %qs at "
15400 "%L with non-C_Bool kind in BIND(C) procedure "
15401 "%qs", sym
->name
, &sym
->declared_at
,
15402 sym
->ns
->proc_name
->name
))
15404 else if (!gfc_logical_kinds
[i
].c_bool
15405 && !gfc_notify_std (GFC_STD_GNU
, "LOGICAL result variable "
15406 "%qs at %L with non-C_Bool kind in "
15407 "BIND(C) procedure %qs", sym
->name
,
15409 sym
->attr
.function
? sym
->name
15410 : sym
->ns
->proc_name
->name
))
15414 switch (sym
->attr
.flavor
)
15417 if (!resolve_fl_variable (sym
, mp_flag
))
15422 if (sym
->formal
&& !sym
->formal_ns
)
15424 /* Check that none of the arguments are a namelist. */
15425 gfc_formal_arglist
*formal
= sym
->formal
;
15427 for (; formal
; formal
= formal
->next
)
15428 if (formal
->sym
&& formal
->sym
->attr
.flavor
== FL_NAMELIST
)
15430 gfc_error ("Namelist %qs cannot be an argument to "
15431 "subroutine or function at %L",
15432 formal
->sym
->name
, &sym
->declared_at
);
15437 if (!resolve_fl_procedure (sym
, mp_flag
))
15442 if (!resolve_fl_namelist (sym
))
15447 if (!resolve_fl_parameter (sym
))
15455 /* Resolve array specifier. Check as well some constraints
15456 on COMMON blocks. */
15458 check_constant
= sym
->attr
.in_common
&& !sym
->attr
.pointer
;
15460 /* Set the formal_arg_flag so that check_conflict will not throw
15461 an error for host associated variables in the specification
15462 expression for an array_valued function. */
15463 if ((sym
->attr
.function
|| sym
->attr
.result
) && sym
->as
)
15464 formal_arg_flag
= true;
15466 saved_specification_expr
= specification_expr
;
15467 specification_expr
= true;
15468 gfc_resolve_array_spec (sym
->as
, check_constant
);
15469 specification_expr
= saved_specification_expr
;
15471 formal_arg_flag
= false;
15473 /* Resolve formal namespaces. */
15474 if (sym
->formal_ns
&& sym
->formal_ns
!= gfc_current_ns
15475 && !sym
->attr
.contained
&& !sym
->attr
.intrinsic
)
15476 gfc_resolve (sym
->formal_ns
);
15478 /* Make sure the formal namespace is present. */
15479 if (sym
->formal
&& !sym
->formal_ns
)
15481 gfc_formal_arglist
*formal
= sym
->formal
;
15482 while (formal
&& !formal
->sym
)
15483 formal
= formal
->next
;
15487 sym
->formal_ns
= formal
->sym
->ns
;
15488 if (sym
->ns
!= formal
->sym
->ns
)
15489 sym
->formal_ns
->refs
++;
15493 /* Check threadprivate restrictions. */
15494 if (sym
->attr
.threadprivate
&& !sym
->attr
.save
15495 && !(sym
->ns
->save_all
&& !sym
->attr
.automatic
)
15496 && (!sym
->attr
.in_common
15497 && sym
->module
== NULL
15498 && (sym
->ns
->proc_name
== NULL
15499 || sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
)))
15500 gfc_error ("Threadprivate at %L isn't SAVEd", &sym
->declared_at
);
15502 /* Check omp declare target restrictions. */
15503 if (sym
->attr
.omp_declare_target
15504 && sym
->attr
.flavor
== FL_VARIABLE
15506 && !(sym
->ns
->save_all
&& !sym
->attr
.automatic
)
15507 && (!sym
->attr
.in_common
15508 && sym
->module
== NULL
15509 && (sym
->ns
->proc_name
== NULL
15510 || sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
)))
15511 gfc_error ("!$OMP DECLARE TARGET variable %qs at %L isn't SAVEd",
15512 sym
->name
, &sym
->declared_at
);
15514 /* If we have come this far we can apply default-initializers, as
15515 described in 14.7.5, to those variables that have not already
15516 been assigned one. */
15517 if (sym
->ts
.type
== BT_DERIVED
15519 && !sym
->attr
.allocatable
15520 && !sym
->attr
.alloc_comp
)
15522 symbol_attribute
*a
= &sym
->attr
;
15524 if ((!a
->save
&& !a
->dummy
&& !a
->pointer
15525 && !a
->in_common
&& !a
->use_assoc
15527 && !((a
->function
|| a
->result
)
15529 || sym
->ts
.u
.derived
->attr
.alloc_comp
15530 || sym
->ts
.u
.derived
->attr
.pointer_comp
))
15531 && !(a
->function
&& sym
!= sym
->result
))
15532 || (a
->dummy
&& a
->intent
== INTENT_OUT
&& !a
->pointer
))
15533 apply_default_init (sym
);
15534 else if (a
->function
&& sym
->result
&& a
->access
!= ACCESS_PRIVATE
15535 && (sym
->ts
.u
.derived
->attr
.alloc_comp
15536 || sym
->ts
.u
.derived
->attr
.pointer_comp
))
15537 /* Mark the result symbol to be referenced, when it has allocatable
15539 sym
->result
->attr
.referenced
= 1;
15542 if (sym
->ts
.type
== BT_CLASS
&& sym
->ns
== gfc_current_ns
15543 && sym
->attr
.dummy
&& sym
->attr
.intent
== INTENT_OUT
15544 && !CLASS_DATA (sym
)->attr
.class_pointer
15545 && !CLASS_DATA (sym
)->attr
.allocatable
)
15546 apply_default_init (sym
);
15548 /* If this symbol has a type-spec, check it. */
15549 if (sym
->attr
.flavor
== FL_VARIABLE
|| sym
->attr
.flavor
== FL_PARAMETER
15550 || (sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.function
))
15551 if (!resolve_typespec_used (&sym
->ts
, &sym
->declared_at
, sym
->name
))
15554 if (sym
->param_list
)
15559 /************* Resolve DATA statements *************/
15563 gfc_data_value
*vnode
;
15569 /* Advance the values structure to point to the next value in the data list. */
15572 next_data_value (void)
15574 while (mpz_cmp_ui (values
.left
, 0) == 0)
15577 if (values
.vnode
->next
== NULL
)
15580 values
.vnode
= values
.vnode
->next
;
15581 mpz_set (values
.left
, values
.vnode
->repeat
);
15589 check_data_variable (gfc_data_variable
*var
, locus
*where
)
15595 ar_type mark
= AR_UNKNOWN
;
15597 mpz_t section_index
[GFC_MAX_DIMENSIONS
];
15603 if (!gfc_resolve_expr (var
->expr
))
15607 mpz_init_set_si (offset
, 0);
15610 if (e
->expr_type
== EXPR_FUNCTION
&& e
->value
.function
.isym
15611 && e
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
)
15612 e
= e
->value
.function
.actual
->expr
;
15614 if (e
->expr_type
!= EXPR_VARIABLE
)
15616 gfc_error ("Expecting definable entity near %L", where
);
15620 sym
= e
->symtree
->n
.sym
;
15622 if (sym
->ns
->is_block_data
&& !sym
->attr
.in_common
)
15624 gfc_error ("BLOCK DATA element %qs at %L must be in COMMON",
15625 sym
->name
, &sym
->declared_at
);
15629 if (e
->ref
== NULL
&& sym
->as
)
15631 gfc_error ("DATA array %qs at %L must be specified in a previous"
15632 " declaration", sym
->name
, where
);
15636 has_pointer
= sym
->attr
.pointer
;
15638 if (gfc_is_coindexed (e
))
15640 gfc_error ("DATA element %qs at %L cannot have a coindex", sym
->name
,
15645 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
15647 if (ref
->type
== REF_COMPONENT
&& ref
->u
.c
.component
->attr
.pointer
)
15651 && ref
->type
== REF_ARRAY
15652 && ref
->u
.ar
.type
!= AR_FULL
)
15654 gfc_error ("DATA element %qs at %L is a pointer and so must "
15655 "be a full array", sym
->name
, where
);
15660 if (e
->rank
== 0 || has_pointer
)
15662 mpz_init_set_ui (size
, 1);
15669 /* Find the array section reference. */
15670 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
15672 if (ref
->type
!= REF_ARRAY
)
15674 if (ref
->u
.ar
.type
== AR_ELEMENT
)
15680 /* Set marks according to the reference pattern. */
15681 switch (ref
->u
.ar
.type
)
15689 /* Get the start position of array section. */
15690 gfc_get_section_index (ar
, section_index
, &offset
);
15695 gcc_unreachable ();
15698 if (!gfc_array_size (e
, &size
))
15700 gfc_error ("Nonconstant array section at %L in DATA statement",
15702 mpz_clear (offset
);
15709 while (mpz_cmp_ui (size
, 0) > 0)
15711 if (!next_data_value ())
15713 gfc_error ("DATA statement at %L has more variables than values",
15719 t
= gfc_check_assign (var
->expr
, values
.vnode
->expr
, 0);
15723 /* If we have more than one element left in the repeat count,
15724 and we have more than one element left in the target variable,
15725 then create a range assignment. */
15726 /* FIXME: Only done for full arrays for now, since array sections
15728 if (mark
== AR_FULL
&& ref
&& ref
->next
== NULL
15729 && mpz_cmp_ui (values
.left
, 1) > 0 && mpz_cmp_ui (size
, 1) > 0)
15733 if (mpz_cmp (size
, values
.left
) >= 0)
15735 mpz_init_set (range
, values
.left
);
15736 mpz_sub (size
, size
, values
.left
);
15737 mpz_set_ui (values
.left
, 0);
15741 mpz_init_set (range
, size
);
15742 mpz_sub (values
.left
, values
.left
, size
);
15743 mpz_set_ui (size
, 0);
15746 t
= gfc_assign_data_value (var
->expr
, values
.vnode
->expr
,
15749 mpz_add (offset
, offset
, range
);
15756 /* Assign initial value to symbol. */
15759 mpz_sub_ui (values
.left
, values
.left
, 1);
15760 mpz_sub_ui (size
, size
, 1);
15762 t
= gfc_assign_data_value (var
->expr
, values
.vnode
->expr
,
15767 if (mark
== AR_FULL
)
15768 mpz_add_ui (offset
, offset
, 1);
15770 /* Modify the array section indexes and recalculate the offset
15771 for next element. */
15772 else if (mark
== AR_SECTION
)
15773 gfc_advance_section (section_index
, ar
, &offset
);
15777 if (mark
== AR_SECTION
)
15779 for (i
= 0; i
< ar
->dimen
; i
++)
15780 mpz_clear (section_index
[i
]);
15784 mpz_clear (offset
);
15790 static bool traverse_data_var (gfc_data_variable
*, locus
*);
15792 /* Iterate over a list of elements in a DATA statement. */
15795 traverse_data_list (gfc_data_variable
*var
, locus
*where
)
15798 iterator_stack frame
;
15799 gfc_expr
*e
, *start
, *end
, *step
;
15800 bool retval
= true;
15802 mpz_init (frame
.value
);
15805 start
= gfc_copy_expr (var
->iter
.start
);
15806 end
= gfc_copy_expr (var
->iter
.end
);
15807 step
= gfc_copy_expr (var
->iter
.step
);
15809 if (!gfc_simplify_expr (start
, 1)
15810 || start
->expr_type
!= EXPR_CONSTANT
)
15812 gfc_error ("start of implied-do loop at %L could not be "
15813 "simplified to a constant value", &start
->where
);
15817 if (!gfc_simplify_expr (end
, 1)
15818 || end
->expr_type
!= EXPR_CONSTANT
)
15820 gfc_error ("end of implied-do loop at %L could not be "
15821 "simplified to a constant value", &start
->where
);
15825 if (!gfc_simplify_expr (step
, 1)
15826 || step
->expr_type
!= EXPR_CONSTANT
)
15828 gfc_error ("step of implied-do loop at %L could not be "
15829 "simplified to a constant value", &start
->where
);
15834 mpz_set (trip
, end
->value
.integer
);
15835 mpz_sub (trip
, trip
, start
->value
.integer
);
15836 mpz_add (trip
, trip
, step
->value
.integer
);
15838 mpz_div (trip
, trip
, step
->value
.integer
);
15840 mpz_set (frame
.value
, start
->value
.integer
);
15842 frame
.prev
= iter_stack
;
15843 frame
.variable
= var
->iter
.var
->symtree
;
15844 iter_stack
= &frame
;
15846 while (mpz_cmp_ui (trip
, 0) > 0)
15848 if (!traverse_data_var (var
->list
, where
))
15854 e
= gfc_copy_expr (var
->expr
);
15855 if (!gfc_simplify_expr (e
, 1))
15862 mpz_add (frame
.value
, frame
.value
, step
->value
.integer
);
15864 mpz_sub_ui (trip
, trip
, 1);
15868 mpz_clear (frame
.value
);
15871 gfc_free_expr (start
);
15872 gfc_free_expr (end
);
15873 gfc_free_expr (step
);
15875 iter_stack
= frame
.prev
;
15880 /* Type resolve variables in the variable list of a DATA statement. */
15883 traverse_data_var (gfc_data_variable
*var
, locus
*where
)
15887 for (; var
; var
= var
->next
)
15889 if (var
->expr
== NULL
)
15890 t
= traverse_data_list (var
, where
);
15892 t
= check_data_variable (var
, where
);
15902 /* Resolve the expressions and iterators associated with a data statement.
15903 This is separate from the assignment checking because data lists should
15904 only be resolved once. */
15907 resolve_data_variables (gfc_data_variable
*d
)
15909 for (; d
; d
= d
->next
)
15911 if (d
->list
== NULL
)
15913 if (!gfc_resolve_expr (d
->expr
))
15918 if (!gfc_resolve_iterator (&d
->iter
, false, true))
15921 if (!resolve_data_variables (d
->list
))
15930 /* Resolve a single DATA statement. We implement this by storing a pointer to
15931 the value list into static variables, and then recursively traversing the
15932 variables list, expanding iterators and such. */
15935 resolve_data (gfc_data
*d
)
15938 if (!resolve_data_variables (d
->var
))
15941 values
.vnode
= d
->value
;
15942 if (d
->value
== NULL
)
15943 mpz_set_ui (values
.left
, 0);
15945 mpz_set (values
.left
, d
->value
->repeat
);
15947 if (!traverse_data_var (d
->var
, &d
->where
))
15950 /* At this point, we better not have any values left. */
15952 if (next_data_value ())
15953 gfc_error ("DATA statement at %L has more values than variables",
15958 /* 12.6 Constraint: In a pure subprogram any variable which is in common or
15959 accessed by host or use association, is a dummy argument to a pure function,
15960 is a dummy argument with INTENT (IN) to a pure subroutine, or an object that
15961 is storage associated with any such variable, shall not be used in the
15962 following contexts: (clients of this function). */
15964 /* Determines if a variable is not 'pure', i.e., not assignable within a pure
15965 procedure. Returns zero if assignment is OK, nonzero if there is a
15968 gfc_impure_variable (gfc_symbol
*sym
)
15973 if (sym
->attr
.use_assoc
|| sym
->attr
.in_common
)
15976 /* Check if the symbol's ns is inside the pure procedure. */
15977 for (ns
= gfc_current_ns
; ns
; ns
= ns
->parent
)
15981 if (ns
->proc_name
->attr
.flavor
== FL_PROCEDURE
&& !sym
->attr
.function
)
15985 proc
= sym
->ns
->proc_name
;
15986 if (sym
->attr
.dummy
15987 && ((proc
->attr
.subroutine
&& sym
->attr
.intent
== INTENT_IN
)
15988 || proc
->attr
.function
))
15991 /* TODO: Sort out what can be storage associated, if anything, and include
15992 it here. In principle equivalences should be scanned but it does not
15993 seem to be possible to storage associate an impure variable this way. */
15998 /* Test whether a symbol is pure or not. For a NULL pointer, checks if the
15999 current namespace is inside a pure procedure. */
16002 gfc_pure (gfc_symbol
*sym
)
16004 symbol_attribute attr
;
16009 /* Check if the current namespace or one of its parents
16010 belongs to a pure procedure. */
16011 for (ns
= gfc_current_ns
; ns
; ns
= ns
->parent
)
16013 sym
= ns
->proc_name
;
16017 if (attr
.flavor
== FL_PROCEDURE
&& attr
.pure
)
16025 return attr
.flavor
== FL_PROCEDURE
&& attr
.pure
;
16029 /* Test whether a symbol is implicitly pure or not. For a NULL pointer,
16030 checks if the current namespace is implicitly pure. Note that this
16031 function returns false for a PURE procedure. */
16034 gfc_implicit_pure (gfc_symbol
*sym
)
16040 /* Check if the current procedure is implicit_pure. Walk up
16041 the procedure list until we find a procedure. */
16042 for (ns
= gfc_current_ns
; ns
; ns
= ns
->parent
)
16044 sym
= ns
->proc_name
;
16048 if (sym
->attr
.flavor
== FL_PROCEDURE
)
16053 return sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.implicit_pure
16054 && !sym
->attr
.pure
;
16059 gfc_unset_implicit_pure (gfc_symbol
*sym
)
16065 /* Check if the current procedure is implicit_pure. Walk up
16066 the procedure list until we find a procedure. */
16067 for (ns
= gfc_current_ns
; ns
; ns
= ns
->parent
)
16069 sym
= ns
->proc_name
;
16073 if (sym
->attr
.flavor
== FL_PROCEDURE
)
16078 if (sym
->attr
.flavor
== FL_PROCEDURE
)
16079 sym
->attr
.implicit_pure
= 0;
16081 sym
->attr
.pure
= 0;
16085 /* Test whether the current procedure is elemental or not. */
16088 gfc_elemental (gfc_symbol
*sym
)
16090 symbol_attribute attr
;
16093 sym
= gfc_current_ns
->proc_name
;
16098 return attr
.flavor
== FL_PROCEDURE
&& attr
.elemental
;
16102 /* Warn about unused labels. */
16105 warn_unused_fortran_label (gfc_st_label
*label
)
16110 warn_unused_fortran_label (label
->left
);
16112 if (label
->defined
== ST_LABEL_UNKNOWN
)
16115 switch (label
->referenced
)
16117 case ST_LABEL_UNKNOWN
:
16118 gfc_warning (OPT_Wunused_label
, "Label %d at %L defined but not used",
16119 label
->value
, &label
->where
);
16122 case ST_LABEL_BAD_TARGET
:
16123 gfc_warning (OPT_Wunused_label
,
16124 "Label %d at %L defined but cannot be used",
16125 label
->value
, &label
->where
);
16132 warn_unused_fortran_label (label
->right
);
16136 /* Returns the sequence type of a symbol or sequence. */
16139 sequence_type (gfc_typespec ts
)
16148 if (ts
.u
.derived
->components
== NULL
)
16149 return SEQ_NONDEFAULT
;
16151 result
= sequence_type (ts
.u
.derived
->components
->ts
);
16152 for (c
= ts
.u
.derived
->components
->next
; c
; c
= c
->next
)
16153 if (sequence_type (c
->ts
) != result
)
16159 if (ts
.kind
!= gfc_default_character_kind
)
16160 return SEQ_NONDEFAULT
;
16162 return SEQ_CHARACTER
;
16165 if (ts
.kind
!= gfc_default_integer_kind
)
16166 return SEQ_NONDEFAULT
;
16168 return SEQ_NUMERIC
;
16171 if (!(ts
.kind
== gfc_default_real_kind
16172 || ts
.kind
== gfc_default_double_kind
))
16173 return SEQ_NONDEFAULT
;
16175 return SEQ_NUMERIC
;
16178 if (ts
.kind
!= gfc_default_complex_kind
)
16179 return SEQ_NONDEFAULT
;
16181 return SEQ_NUMERIC
;
16184 if (ts
.kind
!= gfc_default_logical_kind
)
16185 return SEQ_NONDEFAULT
;
16187 return SEQ_NUMERIC
;
16190 return SEQ_NONDEFAULT
;
16195 /* Resolve derived type EQUIVALENCE object. */
16198 resolve_equivalence_derived (gfc_symbol
*derived
, gfc_symbol
*sym
, gfc_expr
*e
)
16200 gfc_component
*c
= derived
->components
;
16205 /* Shall not be an object of nonsequence derived type. */
16206 if (!derived
->attr
.sequence
)
16208 gfc_error ("Derived type variable %qs at %L must have SEQUENCE "
16209 "attribute to be an EQUIVALENCE object", sym
->name
,
16214 /* Shall not have allocatable components. */
16215 if (derived
->attr
.alloc_comp
)
16217 gfc_error ("Derived type variable %qs at %L cannot have ALLOCATABLE "
16218 "components to be an EQUIVALENCE object",sym
->name
,
16223 if (sym
->attr
.in_common
&& gfc_has_default_initializer (sym
->ts
.u
.derived
))
16225 gfc_error ("Derived type variable %qs at %L with default "
16226 "initialization cannot be in EQUIVALENCE with a variable "
16227 "in COMMON", sym
->name
, &e
->where
);
16231 for (; c
; c
= c
->next
)
16233 if (gfc_bt_struct (c
->ts
.type
)
16234 && (!resolve_equivalence_derived(c
->ts
.u
.derived
, sym
, e
)))
16237 /* Shall not be an object of sequence derived type containing a pointer
16238 in the structure. */
16239 if (c
->attr
.pointer
)
16241 gfc_error ("Derived type variable %qs at %L with pointer "
16242 "component(s) cannot be an EQUIVALENCE object",
16243 sym
->name
, &e
->where
);
16251 /* Resolve equivalence object.
16252 An EQUIVALENCE object shall not be a dummy argument, a pointer, a target,
16253 an allocatable array, an object of nonsequence derived type, an object of
16254 sequence derived type containing a pointer at any level of component
16255 selection, an automatic object, a function name, an entry name, a result
16256 name, a named constant, a structure component, or a subobject of any of
16257 the preceding objects. A substring shall not have length zero. A
16258 derived type shall not have components with default initialization nor
16259 shall two objects of an equivalence group be initialized.
16260 Either all or none of the objects shall have an protected attribute.
16261 The simple constraints are done in symbol.c(check_conflict) and the rest
16262 are implemented here. */
16265 resolve_equivalence (gfc_equiv
*eq
)
16268 gfc_symbol
*first_sym
;
16271 locus
*last_where
= NULL
;
16272 seq_type eq_type
, last_eq_type
;
16273 gfc_typespec
*last_ts
;
16274 int object
, cnt_protected
;
16277 last_ts
= &eq
->expr
->symtree
->n
.sym
->ts
;
16279 first_sym
= eq
->expr
->symtree
->n
.sym
;
16283 for (object
= 1; eq
; eq
= eq
->eq
, object
++)
16287 e
->ts
= e
->symtree
->n
.sym
->ts
;
16288 /* match_varspec might not know yet if it is seeing
16289 array reference or substring reference, as it doesn't
16291 if (e
->ref
&& e
->ref
->type
== REF_ARRAY
)
16293 gfc_ref
*ref
= e
->ref
;
16294 sym
= e
->symtree
->n
.sym
;
16296 if (sym
->attr
.dimension
)
16298 ref
->u
.ar
.as
= sym
->as
;
16302 /* For substrings, convert REF_ARRAY into REF_SUBSTRING. */
16303 if (e
->ts
.type
== BT_CHARACTER
16305 && ref
->type
== REF_ARRAY
16306 && ref
->u
.ar
.dimen
== 1
16307 && ref
->u
.ar
.dimen_type
[0] == DIMEN_RANGE
16308 && ref
->u
.ar
.stride
[0] == NULL
)
16310 gfc_expr
*start
= ref
->u
.ar
.start
[0];
16311 gfc_expr
*end
= ref
->u
.ar
.end
[0];
16314 /* Optimize away the (:) reference. */
16315 if (start
== NULL
&& end
== NULL
)
16318 e
->ref
= ref
->next
;
16320 e
->ref
->next
= ref
->next
;
16325 ref
->type
= REF_SUBSTRING
;
16327 start
= gfc_get_int_expr (gfc_charlen_int_kind
,
16329 ref
->u
.ss
.start
= start
;
16330 if (end
== NULL
&& e
->ts
.u
.cl
)
16331 end
= gfc_copy_expr (e
->ts
.u
.cl
->length
);
16332 ref
->u
.ss
.end
= end
;
16333 ref
->u
.ss
.length
= e
->ts
.u
.cl
;
16340 /* Any further ref is an error. */
16343 gcc_assert (ref
->type
== REF_ARRAY
);
16344 gfc_error ("Syntax error in EQUIVALENCE statement at %L",
16350 if (!gfc_resolve_expr (e
))
16353 sym
= e
->symtree
->n
.sym
;
16355 if (sym
->attr
.is_protected
)
16357 if (cnt_protected
> 0 && cnt_protected
!= object
)
16359 gfc_error ("Either all or none of the objects in the "
16360 "EQUIVALENCE set at %L shall have the "
16361 "PROTECTED attribute",
16366 /* Shall not equivalence common block variables in a PURE procedure. */
16367 if (sym
->ns
->proc_name
16368 && sym
->ns
->proc_name
->attr
.pure
16369 && sym
->attr
.in_common
)
16371 /* Need to check for symbols that may have entered the pure
16372 procedure via a USE statement. */
16373 bool saw_sym
= false;
16374 if (sym
->ns
->use_stmts
)
16377 for (r
= sym
->ns
->use_stmts
->rename
; r
; r
= r
->next
)
16378 if (strcmp(r
->use_name
, sym
->name
) == 0) saw_sym
= true;
16384 gfc_error ("COMMON block member %qs at %L cannot be an "
16385 "EQUIVALENCE object in the pure procedure %qs",
16386 sym
->name
, &e
->where
, sym
->ns
->proc_name
->name
);
16390 /* Shall not be a named constant. */
16391 if (e
->expr_type
== EXPR_CONSTANT
)
16393 gfc_error ("Named constant %qs at %L cannot be an EQUIVALENCE "
16394 "object", sym
->name
, &e
->where
);
16398 if (e
->ts
.type
== BT_DERIVED
16399 && !resolve_equivalence_derived (e
->ts
.u
.derived
, sym
, e
))
16402 /* Check that the types correspond correctly:
16404 A numeric sequence structure may be equivalenced to another sequence
16405 structure, an object of default integer type, default real type, double
16406 precision real type, default logical type such that components of the
16407 structure ultimately only become associated to objects of the same
16408 kind. A character sequence structure may be equivalenced to an object
16409 of default character kind or another character sequence structure.
16410 Other objects may be equivalenced only to objects of the same type and
16411 kind parameters. */
16413 /* Identical types are unconditionally OK. */
16414 if (object
== 1 || gfc_compare_types (last_ts
, &sym
->ts
))
16415 goto identical_types
;
16417 last_eq_type
= sequence_type (*last_ts
);
16418 eq_type
= sequence_type (sym
->ts
);
16420 /* Since the pair of objects is not of the same type, mixed or
16421 non-default sequences can be rejected. */
16423 msg
= "Sequence %s with mixed components in EQUIVALENCE "
16424 "statement at %L with different type objects";
16426 && last_eq_type
== SEQ_MIXED
16427 && !gfc_notify_std (GFC_STD_GNU
, msg
, first_sym
->name
, last_where
))
16428 || (eq_type
== SEQ_MIXED
16429 && !gfc_notify_std (GFC_STD_GNU
, msg
, sym
->name
, &e
->where
)))
16432 msg
= "Non-default type object or sequence %s in EQUIVALENCE "
16433 "statement at %L with objects of different type";
16435 && last_eq_type
== SEQ_NONDEFAULT
16436 && !gfc_notify_std (GFC_STD_GNU
, msg
, first_sym
->name
, last_where
))
16437 || (eq_type
== SEQ_NONDEFAULT
16438 && !gfc_notify_std (GFC_STD_GNU
, msg
, sym
->name
, &e
->where
)))
16441 msg
="Non-CHARACTER object %qs in default CHARACTER "
16442 "EQUIVALENCE statement at %L";
16443 if (last_eq_type
== SEQ_CHARACTER
16444 && eq_type
!= SEQ_CHARACTER
16445 && !gfc_notify_std (GFC_STD_GNU
, msg
, sym
->name
, &e
->where
))
16448 msg
="Non-NUMERIC object %qs in default NUMERIC "
16449 "EQUIVALENCE statement at %L";
16450 if (last_eq_type
== SEQ_NUMERIC
16451 && eq_type
!= SEQ_NUMERIC
16452 && !gfc_notify_std (GFC_STD_GNU
, msg
, sym
->name
, &e
->where
))
16457 last_where
= &e
->where
;
16462 /* Shall not be an automatic array. */
16463 if (e
->ref
->type
== REF_ARRAY
16464 && !gfc_resolve_array_spec (e
->ref
->u
.ar
.as
, 1))
16466 gfc_error ("Array %qs at %L with non-constant bounds cannot be "
16467 "an EQUIVALENCE object", sym
->name
, &e
->where
);
16474 /* Shall not be a structure component. */
16475 if (r
->type
== REF_COMPONENT
)
16477 gfc_error ("Structure component %qs at %L cannot be an "
16478 "EQUIVALENCE object",
16479 r
->u
.c
.component
->name
, &e
->where
);
16483 /* A substring shall not have length zero. */
16484 if (r
->type
== REF_SUBSTRING
)
16486 if (compare_bound (r
->u
.ss
.start
, r
->u
.ss
.end
) == CMP_GT
)
16488 gfc_error ("Substring at %L has length zero",
16489 &r
->u
.ss
.start
->where
);
16499 /* Function called by resolve_fntype to flag other symbol used in the
16500 length type parameter specification of function resuls. */
16503 flag_fn_result_spec (gfc_expr
*expr
,
16505 int *f ATTRIBUTE_UNUSED
)
16510 if (expr
->expr_type
== EXPR_VARIABLE
)
16512 s
= expr
->symtree
->n
.sym
;
16513 for (ns
= s
->ns
; ns
; ns
= ns
->parent
)
16519 gfc_error ("Self reference in character length expression "
16520 "for %qs at %L", sym
->name
, &expr
->where
);
16524 if (!s
->fn_result_spec
16525 && s
->attr
.flavor
== FL_PARAMETER
)
16527 /* Function contained in a module.... */
16528 if (ns
->proc_name
&& ns
->proc_name
->attr
.flavor
== FL_MODULE
)
16531 s
->fn_result_spec
= 1;
16532 /* Make sure that this symbol is translated as a module
16534 st
= gfc_get_unique_symtree (ns
);
16538 /* ... which is use associated and called. */
16539 else if (s
->attr
.use_assoc
|| s
->attr
.used_in_submodule
16541 /* External function matched with an interface. */
16544 && s
->ns
->proc_name
->attr
.if_source
== IFSRC_DECL
)
16545 || s
->ns
->proc_name
->attr
.if_source
== IFSRC_IFBODY
)
16546 && s
->ns
->proc_name
->attr
.function
))
16547 s
->fn_result_spec
= 1;
16554 /* Resolve function and ENTRY types, issue diagnostics if needed. */
16557 resolve_fntype (gfc_namespace
*ns
)
16559 gfc_entry_list
*el
;
16562 if (ns
->proc_name
== NULL
|| !ns
->proc_name
->attr
.function
)
16565 /* If there are any entries, ns->proc_name is the entry master
16566 synthetic symbol and ns->entries->sym actual FUNCTION symbol. */
16568 sym
= ns
->entries
->sym
;
16570 sym
= ns
->proc_name
;
16571 if (sym
->result
== sym
16572 && sym
->ts
.type
== BT_UNKNOWN
16573 && !gfc_set_default_type (sym
, 0, NULL
)
16574 && !sym
->attr
.untyped
)
16576 gfc_error ("Function %qs at %L has no IMPLICIT type",
16577 sym
->name
, &sym
->declared_at
);
16578 sym
->attr
.untyped
= 1;
16581 if (sym
->ts
.type
== BT_DERIVED
&& !sym
->ts
.u
.derived
->attr
.use_assoc
16582 && !sym
->attr
.contained
16583 && !gfc_check_symbol_access (sym
->ts
.u
.derived
)
16584 && gfc_check_symbol_access (sym
))
16586 gfc_notify_std (GFC_STD_F2003
, "PUBLIC function %qs at "
16587 "%L of PRIVATE type %qs", sym
->name
,
16588 &sym
->declared_at
, sym
->ts
.u
.derived
->name
);
16592 for (el
= ns
->entries
->next
; el
; el
= el
->next
)
16594 if (el
->sym
->result
== el
->sym
16595 && el
->sym
->ts
.type
== BT_UNKNOWN
16596 && !gfc_set_default_type (el
->sym
, 0, NULL
)
16597 && !el
->sym
->attr
.untyped
)
16599 gfc_error ("ENTRY %qs at %L has no IMPLICIT type",
16600 el
->sym
->name
, &el
->sym
->declared_at
);
16601 el
->sym
->attr
.untyped
= 1;
16605 if (sym
->ts
.type
== BT_CHARACTER
)
16606 gfc_traverse_expr (sym
->ts
.u
.cl
->length
, sym
, flag_fn_result_spec
, 0);
16610 /* 12.3.2.1.1 Defined operators. */
16613 check_uop_procedure (gfc_symbol
*sym
, locus where
)
16615 gfc_formal_arglist
*formal
;
16617 if (!sym
->attr
.function
)
16619 gfc_error ("User operator procedure %qs at %L must be a FUNCTION",
16620 sym
->name
, &where
);
16624 if (sym
->ts
.type
== BT_CHARACTER
16625 && !((sym
->ts
.u
.cl
&& sym
->ts
.u
.cl
->length
) || sym
->ts
.deferred
)
16626 && !(sym
->result
&& ((sym
->result
->ts
.u
.cl
16627 && sym
->result
->ts
.u
.cl
->length
) || sym
->result
->ts
.deferred
)))
16629 gfc_error ("User operator procedure %qs at %L cannot be assumed "
16630 "character length", sym
->name
, &where
);
16634 formal
= gfc_sym_get_dummy_args (sym
);
16635 if (!formal
|| !formal
->sym
)
16637 gfc_error ("User operator procedure %qs at %L must have at least "
16638 "one argument", sym
->name
, &where
);
16642 if (formal
->sym
->attr
.intent
!= INTENT_IN
)
16644 gfc_error ("First argument of operator interface at %L must be "
16645 "INTENT(IN)", &where
);
16649 if (formal
->sym
->attr
.optional
)
16651 gfc_error ("First argument of operator interface at %L cannot be "
16652 "optional", &where
);
16656 formal
= formal
->next
;
16657 if (!formal
|| !formal
->sym
)
16660 if (formal
->sym
->attr
.intent
!= INTENT_IN
)
16662 gfc_error ("Second argument of operator interface at %L must be "
16663 "INTENT(IN)", &where
);
16667 if (formal
->sym
->attr
.optional
)
16669 gfc_error ("Second argument of operator interface at %L cannot be "
16670 "optional", &where
);
16676 gfc_error ("Operator interface at %L must have, at most, two "
16677 "arguments", &where
);
16685 gfc_resolve_uops (gfc_symtree
*symtree
)
16687 gfc_interface
*itr
;
16689 if (symtree
== NULL
)
16692 gfc_resolve_uops (symtree
->left
);
16693 gfc_resolve_uops (symtree
->right
);
16695 for (itr
= symtree
->n
.uop
->op
; itr
; itr
= itr
->next
)
16696 check_uop_procedure (itr
->sym
, itr
->sym
->declared_at
);
16700 /* Examine all of the expressions associated with a program unit,
16701 assign types to all intermediate expressions, make sure that all
16702 assignments are to compatible types and figure out which names
16703 refer to which functions or subroutines. It doesn't check code
16704 block, which is handled by gfc_resolve_code. */
16707 resolve_types (gfc_namespace
*ns
)
16713 gfc_namespace
* old_ns
= gfc_current_ns
;
16715 if (ns
->types_resolved
)
16718 /* Check that all IMPLICIT types are ok. */
16719 if (!ns
->seen_implicit_none
)
16722 for (letter
= 0; letter
!= GFC_LETTERS
; ++letter
)
16723 if (ns
->set_flag
[letter
]
16724 && !resolve_typespec_used (&ns
->default_type
[letter
],
16725 &ns
->implicit_loc
[letter
], NULL
))
16729 gfc_current_ns
= ns
;
16731 resolve_entries (ns
);
16733 resolve_common_vars (&ns
->blank_common
, false);
16734 resolve_common_blocks (ns
->common_root
);
16736 resolve_contained_functions (ns
);
16738 if (ns
->proc_name
&& ns
->proc_name
->attr
.flavor
== FL_PROCEDURE
16739 && ns
->proc_name
->attr
.if_source
== IFSRC_IFBODY
)
16740 resolve_formal_arglist (ns
->proc_name
);
16742 gfc_traverse_ns (ns
, resolve_bind_c_derived_types
);
16744 for (cl
= ns
->cl_list
; cl
; cl
= cl
->next
)
16745 resolve_charlen (cl
);
16747 gfc_traverse_ns (ns
, resolve_symbol
);
16749 resolve_fntype (ns
);
16751 for (n
= ns
->contained
; n
; n
= n
->sibling
)
16753 if (gfc_pure (ns
->proc_name
) && !gfc_pure (n
->proc_name
))
16754 gfc_error ("Contained procedure %qs at %L of a PURE procedure must "
16755 "also be PURE", n
->proc_name
->name
,
16756 &n
->proc_name
->declared_at
);
16762 gfc_do_concurrent_flag
= 0;
16763 gfc_check_interfaces (ns
);
16765 gfc_traverse_ns (ns
, resolve_values
);
16767 if (ns
->save_all
|| !flag_automatic
)
16771 for (d
= ns
->data
; d
; d
= d
->next
)
16775 gfc_traverse_ns (ns
, gfc_formalize_init_value
);
16777 gfc_traverse_ns (ns
, gfc_verify_binding_labels
);
16779 for (eq
= ns
->equiv
; eq
; eq
= eq
->next
)
16780 resolve_equivalence (eq
);
16782 /* Warn about unused labels. */
16783 if (warn_unused_label
)
16784 warn_unused_fortran_label (ns
->st_labels
);
16786 gfc_resolve_uops (ns
->uop_root
);
16788 gfc_traverse_ns (ns
, gfc_verify_DTIO_procedures
);
16790 gfc_resolve_omp_declare_simd (ns
);
16792 gfc_resolve_omp_udrs (ns
->omp_udr_root
);
16794 ns
->types_resolved
= 1;
16796 gfc_current_ns
= old_ns
;
16800 /* Call gfc_resolve_code recursively. */
16803 resolve_codes (gfc_namespace
*ns
)
16806 bitmap_obstack old_obstack
;
16808 if (ns
->resolved
== 1)
16811 for (n
= ns
->contained
; n
; n
= n
->sibling
)
16814 gfc_current_ns
= ns
;
16816 /* Don't clear 'cs_base' if this is the namespace of a BLOCK construct. */
16817 if (!(ns
->proc_name
&& ns
->proc_name
->attr
.flavor
== FL_LABEL
))
16820 /* Set to an out of range value. */
16821 current_entry_id
= -1;
16823 old_obstack
= labels_obstack
;
16824 bitmap_obstack_initialize (&labels_obstack
);
16826 gfc_resolve_oacc_declare (ns
);
16827 gfc_resolve_oacc_routines (ns
);
16828 gfc_resolve_omp_local_vars (ns
);
16829 gfc_resolve_code (ns
->code
, ns
);
16831 bitmap_obstack_release (&labels_obstack
);
16832 labels_obstack
= old_obstack
;
16836 /* This function is called after a complete program unit has been compiled.
16837 Its purpose is to examine all of the expressions associated with a program
16838 unit, assign types to all intermediate expressions, make sure that all
16839 assignments are to compatible types and figure out which names refer to
16840 which functions or subroutines. */
16843 gfc_resolve (gfc_namespace
*ns
)
16845 gfc_namespace
*old_ns
;
16846 code_stack
*old_cs_base
;
16847 struct gfc_omp_saved_state old_omp_state
;
16853 old_ns
= gfc_current_ns
;
16854 old_cs_base
= cs_base
;
16856 /* As gfc_resolve can be called during resolution of an OpenMP construct
16857 body, we should clear any state associated to it, so that say NS's
16858 DO loops are not interpreted as OpenMP loops. */
16859 if (!ns
->construct_entities
)
16860 gfc_omp_save_and_clear_state (&old_omp_state
);
16862 resolve_types (ns
);
16863 component_assignment_level
= 0;
16864 resolve_codes (ns
);
16866 gfc_current_ns
= old_ns
;
16867 cs_base
= old_cs_base
;
16870 gfc_run_passes (ns
);
16872 if (!ns
->construct_entities
)
16873 gfc_omp_restore_state (&old_omp_state
);