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
->resolved
!= -1
2502 && gsym
->ns
->proc_name
2503 && not_in_recursive (sym
, gsym
->ns
)
2504 && not_entry_self_reference (sym
, gsym
->ns
))
2506 gfc_symbol
*def_sym
;
2508 /* Resolve the gsymbol namespace if needed. */
2509 if (!gsym
->ns
->resolved
)
2511 gfc_symbol
*old_dt_list
;
2513 /* Stash away derived types so that the backend_decls do not
2515 old_dt_list
= gfc_derived_types
;
2516 gfc_derived_types
= NULL
;
2518 gfc_resolve (gsym
->ns
);
2520 /* Store the new derived types with the global namespace. */
2521 if (gfc_derived_types
)
2522 gsym
->ns
->derived_types
= gfc_derived_types
;
2524 /* Restore the derived types of this namespace. */
2525 gfc_derived_types
= old_dt_list
;
2528 /* Make sure that translation for the gsymbol occurs before
2529 the procedure currently being resolved. */
2530 ns
= gfc_global_ns_list
;
2531 for (; ns
&& ns
!= gsym
->ns
; ns
= ns
->sibling
)
2533 if (ns
->sibling
== gsym
->ns
)
2535 ns
->sibling
= gsym
->ns
->sibling
;
2536 gsym
->ns
->sibling
= gfc_global_ns_list
;
2537 gfc_global_ns_list
= gsym
->ns
;
2542 def_sym
= gsym
->ns
->proc_name
;
2544 /* This can happen if a binding name has been specified. */
2545 if (gsym
->binding_label
&& gsym
->sym_name
!= def_sym
->name
)
2546 gfc_find_symbol (gsym
->sym_name
, gsym
->ns
, 0, &def_sym
);
2548 if (def_sym
->attr
.entry_master
)
2550 gfc_entry_list
*entry
;
2551 for (entry
= gsym
->ns
->entries
; entry
; entry
= entry
->next
)
2552 if (strcmp (entry
->sym
->name
, sym
->name
) == 0)
2554 def_sym
= entry
->sym
;
2559 if (sym
->attr
.function
&& !gfc_compare_types (&sym
->ts
, &def_sym
->ts
))
2561 gfc_error ("Return type mismatch of function %qs at %L (%s/%s)",
2562 sym
->name
, &sym
->declared_at
, gfc_typename (&sym
->ts
),
2563 gfc_typename (&def_sym
->ts
));
2567 if (sym
->attr
.if_source
== IFSRC_UNKNOWN
2568 && gfc_explicit_interface_required (def_sym
, reason
, sizeof(reason
)))
2570 gfc_error ("Explicit interface required for %qs at %L: %s",
2571 sym
->name
, &sym
->declared_at
, reason
);
2575 if (!pedantic
&& (gfc_option
.allow_std
& GFC_STD_GNU
))
2576 /* Turn erros into warnings with -std=gnu and -std=legacy. */
2577 gfc_errors_to_warnings (true);
2579 if (!gfc_compare_interfaces (sym
, def_sym
, sym
->name
, 0, 1,
2580 reason
, sizeof(reason
), NULL
, NULL
))
2582 gfc_error_opt (OPT_Wargument_mismatch
,
2583 "Interface mismatch in global procedure %qs at %L:"
2584 " %s", sym
->name
, &sym
->declared_at
, reason
);
2589 || ((gfc_option
.warn_std
& GFC_STD_LEGACY
)
2590 && !(gfc_option
.warn_std
& GFC_STD_GNU
)))
2591 gfc_errors_to_warnings (true);
2593 if (sym
->attr
.if_source
!= IFSRC_IFBODY
)
2594 gfc_procedure_use (def_sym
, actual
, where
);
2598 gfc_errors_to_warnings (false);
2600 if (gsym
->type
== GSYM_UNKNOWN
)
2603 gsym
->where
= *where
;
2610 /************* Function resolution *************/
2612 /* Resolve a function call known to be generic.
2613 Section 14.1.2.4.1. */
2616 resolve_generic_f0 (gfc_expr
*expr
, gfc_symbol
*sym
)
2620 if (sym
->attr
.generic
)
2622 s
= gfc_search_interface (sym
->generic
, 0, &expr
->value
.function
.actual
);
2625 expr
->value
.function
.name
= s
->name
;
2626 expr
->value
.function
.esym
= s
;
2628 if (s
->ts
.type
!= BT_UNKNOWN
)
2630 else if (s
->result
!= NULL
&& s
->result
->ts
.type
!= BT_UNKNOWN
)
2631 expr
->ts
= s
->result
->ts
;
2634 expr
->rank
= s
->as
->rank
;
2635 else if (s
->result
!= NULL
&& s
->result
->as
!= NULL
)
2636 expr
->rank
= s
->result
->as
->rank
;
2638 gfc_set_sym_referenced (expr
->value
.function
.esym
);
2643 /* TODO: Need to search for elemental references in generic
2647 if (sym
->attr
.intrinsic
)
2648 return gfc_intrinsic_func_interface (expr
, 0);
2655 resolve_generic_f (gfc_expr
*expr
)
2659 gfc_interface
*intr
= NULL
;
2661 sym
= expr
->symtree
->n
.sym
;
2665 m
= resolve_generic_f0 (expr
, sym
);
2668 else if (m
== MATCH_ERROR
)
2673 for (intr
= sym
->generic
; intr
; intr
= intr
->next
)
2674 if (gfc_fl_struct (intr
->sym
->attr
.flavor
))
2677 if (sym
->ns
->parent
== NULL
)
2679 gfc_find_symbol (sym
->name
, sym
->ns
->parent
, 1, &sym
);
2683 if (!generic_sym (sym
))
2687 /* Last ditch attempt. See if the reference is to an intrinsic
2688 that possesses a matching interface. 14.1.2.4 */
2689 if (sym
&& !intr
&& !gfc_is_intrinsic (sym
, 0, expr
->where
))
2691 if (gfc_init_expr_flag
)
2692 gfc_error ("Function %qs in initialization expression at %L "
2693 "must be an intrinsic function",
2694 expr
->symtree
->n
.sym
->name
, &expr
->where
);
2696 gfc_error ("There is no specific function for the generic %qs "
2697 "at %L", expr
->symtree
->n
.sym
->name
, &expr
->where
);
2703 if (!gfc_convert_to_structure_constructor (expr
, intr
->sym
, NULL
,
2706 if (!gfc_use_derived (expr
->ts
.u
.derived
))
2708 return resolve_structure_cons (expr
, 0);
2711 m
= gfc_intrinsic_func_interface (expr
, 0);
2716 gfc_error ("Generic function %qs at %L is not consistent with a "
2717 "specific intrinsic interface", expr
->symtree
->n
.sym
->name
,
2724 /* Resolve a function call known to be specific. */
2727 resolve_specific_f0 (gfc_symbol
*sym
, gfc_expr
*expr
)
2731 if (sym
->attr
.external
|| sym
->attr
.if_source
== IFSRC_IFBODY
)
2733 if (sym
->attr
.dummy
)
2735 sym
->attr
.proc
= PROC_DUMMY
;
2739 sym
->attr
.proc
= PROC_EXTERNAL
;
2743 if (sym
->attr
.proc
== PROC_MODULE
2744 || sym
->attr
.proc
== PROC_ST_FUNCTION
2745 || sym
->attr
.proc
== PROC_INTERNAL
)
2748 if (sym
->attr
.intrinsic
)
2750 m
= gfc_intrinsic_func_interface (expr
, 1);
2754 gfc_error ("Function %qs at %L is INTRINSIC but is not compatible "
2755 "with an intrinsic", sym
->name
, &expr
->where
);
2763 gfc_procedure_use (sym
, &expr
->value
.function
.actual
, &expr
->where
);
2766 expr
->ts
= sym
->result
->ts
;
2769 expr
->value
.function
.name
= sym
->name
;
2770 expr
->value
.function
.esym
= sym
;
2771 /* Prevent crash when sym->ts.u.derived->components is not set due to previous
2773 if (sym
->ts
.type
== BT_CLASS
&& !CLASS_DATA (sym
))
2775 if (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
)->as
)
2776 expr
->rank
= CLASS_DATA (sym
)->as
->rank
;
2777 else if (sym
->as
!= NULL
)
2778 expr
->rank
= sym
->as
->rank
;
2785 resolve_specific_f (gfc_expr
*expr
)
2790 sym
= expr
->symtree
->n
.sym
;
2794 m
= resolve_specific_f0 (sym
, expr
);
2797 if (m
== MATCH_ERROR
)
2800 if (sym
->ns
->parent
== NULL
)
2803 gfc_find_symbol (sym
->name
, sym
->ns
->parent
, 1, &sym
);
2809 gfc_error ("Unable to resolve the specific function %qs at %L",
2810 expr
->symtree
->n
.sym
->name
, &expr
->where
);
2815 /* Recursively append candidate SYM to CANDIDATES. Store the number of
2816 candidates in CANDIDATES_LEN. */
2819 lookup_function_fuzzy_find_candidates (gfc_symtree
*sym
,
2821 size_t &candidates_len
)
2827 if ((sym
->n
.sym
->ts
.type
!= BT_UNKNOWN
|| sym
->n
.sym
->attr
.external
)
2828 && sym
->n
.sym
->attr
.flavor
== FL_PROCEDURE
)
2829 vec_push (candidates
, candidates_len
, sym
->name
);
2833 lookup_function_fuzzy_find_candidates (p
, candidates
, candidates_len
);
2837 lookup_function_fuzzy_find_candidates (p
, candidates
, candidates_len
);
2841 /* Lookup function FN fuzzily, taking names in SYMROOT into account. */
2844 gfc_lookup_function_fuzzy (const char *fn
, gfc_symtree
*symroot
)
2846 char **candidates
= NULL
;
2847 size_t candidates_len
= 0;
2848 lookup_function_fuzzy_find_candidates (symroot
, candidates
, candidates_len
);
2849 return gfc_closest_fuzzy_match (fn
, candidates
);
2853 /* Resolve a procedure call not known to be generic nor specific. */
2856 resolve_unknown_f (gfc_expr
*expr
)
2861 sym
= expr
->symtree
->n
.sym
;
2863 if (sym
->attr
.dummy
)
2865 sym
->attr
.proc
= PROC_DUMMY
;
2866 expr
->value
.function
.name
= sym
->name
;
2870 /* See if we have an intrinsic function reference. */
2872 if (gfc_is_intrinsic (sym
, 0, expr
->where
))
2874 if (gfc_intrinsic_func_interface (expr
, 1) == MATCH_YES
)
2879 /* The reference is to an external name. */
2881 sym
->attr
.proc
= PROC_EXTERNAL
;
2882 expr
->value
.function
.name
= sym
->name
;
2883 expr
->value
.function
.esym
= expr
->symtree
->n
.sym
;
2885 if (sym
->as
!= NULL
)
2886 expr
->rank
= sym
->as
->rank
;
2888 /* Type of the expression is either the type of the symbol or the
2889 default type of the symbol. */
2892 gfc_procedure_use (sym
, &expr
->value
.function
.actual
, &expr
->where
);
2894 if (sym
->ts
.type
!= BT_UNKNOWN
)
2898 ts
= gfc_get_default_type (sym
->name
, sym
->ns
);
2900 if (ts
->type
== BT_UNKNOWN
)
2903 = gfc_lookup_function_fuzzy (sym
->name
, sym
->ns
->sym_root
);
2905 gfc_error ("Function %qs at %L has no IMPLICIT type"
2906 "; did you mean %qs?",
2907 sym
->name
, &expr
->where
, guessed
);
2909 gfc_error ("Function %qs at %L has no IMPLICIT type",
2910 sym
->name
, &expr
->where
);
2921 /* Return true, if the symbol is an external procedure. */
2923 is_external_proc (gfc_symbol
*sym
)
2925 if (!sym
->attr
.dummy
&& !sym
->attr
.contained
2926 && !gfc_is_intrinsic (sym
, sym
->attr
.subroutine
, sym
->declared_at
)
2927 && sym
->attr
.proc
!= PROC_ST_FUNCTION
2928 && !sym
->attr
.proc_pointer
2929 && !sym
->attr
.use_assoc
2937 /* Figure out if a function reference is pure or not. Also set the name
2938 of the function for a potential error message. Return nonzero if the
2939 function is PURE, zero if not. */
2941 pure_stmt_function (gfc_expr
*, gfc_symbol
*);
2944 gfc_pure_function (gfc_expr
*e
, const char **name
)
2947 gfc_component
*comp
;
2951 if (e
->symtree
!= NULL
2952 && e
->symtree
->n
.sym
!= NULL
2953 && e
->symtree
->n
.sym
->attr
.proc
== PROC_ST_FUNCTION
)
2954 return pure_stmt_function (e
, e
->symtree
->n
.sym
);
2956 comp
= gfc_get_proc_ptr_comp (e
);
2959 pure
= gfc_pure (comp
->ts
.interface
);
2962 else if (e
->value
.function
.esym
)
2964 pure
= gfc_pure (e
->value
.function
.esym
);
2965 *name
= e
->value
.function
.esym
->name
;
2967 else if (e
->value
.function
.isym
)
2969 pure
= e
->value
.function
.isym
->pure
2970 || e
->value
.function
.isym
->elemental
;
2971 *name
= e
->value
.function
.isym
->name
;
2975 /* Implicit functions are not pure. */
2977 *name
= e
->value
.function
.name
;
2984 /* Check if the expression is a reference to an implicitly pure function. */
2987 gfc_implicit_pure_function (gfc_expr
*e
)
2989 gfc_component
*comp
= gfc_get_proc_ptr_comp (e
);
2991 return gfc_implicit_pure (comp
->ts
.interface
);
2992 else if (e
->value
.function
.esym
)
2993 return gfc_implicit_pure (e
->value
.function
.esym
);
3000 impure_stmt_fcn (gfc_expr
*e
, gfc_symbol
*sym
,
3001 int *f ATTRIBUTE_UNUSED
)
3005 /* Don't bother recursing into other statement functions
3006 since they will be checked individually for purity. */
3007 if (e
->expr_type
!= EXPR_FUNCTION
3009 || e
->symtree
->n
.sym
== sym
3010 || e
->symtree
->n
.sym
->attr
.proc
== PROC_ST_FUNCTION
)
3013 return gfc_pure_function (e
, &name
) ? false : true;
3018 pure_stmt_function (gfc_expr
*e
, gfc_symbol
*sym
)
3020 return gfc_traverse_expr (e
, sym
, impure_stmt_fcn
, 0) ? 0 : 1;
3024 /* Check if an impure function is allowed in the current context. */
3026 static bool check_pure_function (gfc_expr
*e
)
3028 const char *name
= NULL
;
3029 if (!gfc_pure_function (e
, &name
) && name
)
3033 gfc_error ("Reference to impure function %qs at %L inside a "
3034 "FORALL %s", name
, &e
->where
,
3035 forall_flag
== 2 ? "mask" : "block");
3038 else if (gfc_do_concurrent_flag
)
3040 gfc_error ("Reference to impure function %qs at %L inside a "
3041 "DO CONCURRENT %s", name
, &e
->where
,
3042 gfc_do_concurrent_flag
== 2 ? "mask" : "block");
3045 else if (gfc_pure (NULL
))
3047 gfc_error ("Reference to impure function %qs at %L "
3048 "within a PURE procedure", name
, &e
->where
);
3051 if (!gfc_implicit_pure_function (e
))
3052 gfc_unset_implicit_pure (NULL
);
3058 /* Update current procedure's array_outer_dependency flag, considering
3059 a call to procedure SYM. */
3062 update_current_proc_array_outer_dependency (gfc_symbol
*sym
)
3064 /* Check to see if this is a sibling function that has not yet
3066 gfc_namespace
*sibling
= gfc_current_ns
->sibling
;
3067 for (; sibling
; sibling
= sibling
->sibling
)
3069 if (sibling
->proc_name
== sym
)
3071 gfc_resolve (sibling
);
3076 /* If SYM has references to outer arrays, so has the procedure calling
3077 SYM. If SYM is a procedure pointer, we can assume the worst. */
3078 if ((sym
->attr
.array_outer_dependency
|| sym
->attr
.proc_pointer
)
3079 && gfc_current_ns
->proc_name
)
3080 gfc_current_ns
->proc_name
->attr
.array_outer_dependency
= 1;
3084 /* Resolve a function call, which means resolving the arguments, then figuring
3085 out which entity the name refers to. */
3088 resolve_function (gfc_expr
*expr
)
3090 gfc_actual_arglist
*arg
;
3094 procedure_type p
= PROC_INTRINSIC
;
3095 bool no_formal_args
;
3099 sym
= expr
->symtree
->n
.sym
;
3101 /* If this is a procedure pointer component, it has already been resolved. */
3102 if (gfc_is_proc_ptr_comp (expr
))
3105 /* Avoid re-resolving the arguments of caf_get, which can lead to inserting
3107 if (sym
&& sym
->attr
.intrinsic
3108 && (sym
->intmod_sym_id
== GFC_ISYM_CAF_GET
3109 || sym
->intmod_sym_id
== GFC_ISYM_CAF_SEND
))
3112 if (sym
&& sym
->attr
.intrinsic
3113 && !gfc_resolve_intrinsic (sym
, &expr
->where
))
3116 if (sym
&& (sym
->attr
.flavor
== FL_VARIABLE
|| sym
->attr
.subroutine
))
3118 gfc_error ("%qs at %L is not a function", sym
->name
, &expr
->where
);
3122 /* If this is a deferred TBP with an abstract interface (which may
3123 of course be referenced), expr->value.function.esym will be set. */
3124 if (sym
&& sym
->attr
.abstract
&& !expr
->value
.function
.esym
)
3126 gfc_error ("ABSTRACT INTERFACE %qs must not be referenced at %L",
3127 sym
->name
, &expr
->where
);
3131 /* If this is a deferred TBP with an abstract interface, its result
3132 cannot be an assumed length character (F2003: C418). */
3133 if (sym
&& sym
->attr
.abstract
&& sym
->attr
.function
3134 && sym
->result
->ts
.u
.cl
3135 && sym
->result
->ts
.u
.cl
->length
== NULL
3136 && !sym
->result
->ts
.deferred
)
3138 gfc_error ("ABSTRACT INTERFACE %qs at %L must not have an assumed "
3139 "character length result (F2008: C418)", sym
->name
,
3144 /* Switch off assumed size checking and do this again for certain kinds
3145 of procedure, once the procedure itself is resolved. */
3146 need_full_assumed_size
++;
3148 if (expr
->symtree
&& expr
->symtree
->n
.sym
)
3149 p
= expr
->symtree
->n
.sym
->attr
.proc
;
3151 if (expr
->value
.function
.isym
&& expr
->value
.function
.isym
->inquiry
)
3152 inquiry_argument
= true;
3153 no_formal_args
= sym
&& is_external_proc (sym
)
3154 && gfc_sym_get_dummy_args (sym
) == NULL
;
3156 if (!resolve_actual_arglist (expr
->value
.function
.actual
,
3159 inquiry_argument
= false;
3163 inquiry_argument
= false;
3165 /* Resume assumed_size checking. */
3166 need_full_assumed_size
--;
3168 /* If the procedure is external, check for usage. */
3169 if (sym
&& is_external_proc (sym
))
3170 resolve_global_procedure (sym
, &expr
->where
,
3171 &expr
->value
.function
.actual
, 0);
3173 if (sym
&& sym
->ts
.type
== BT_CHARACTER
3175 && sym
->ts
.u
.cl
->length
== NULL
3177 && !sym
->ts
.deferred
3178 && expr
->value
.function
.esym
== NULL
3179 && !sym
->attr
.contained
)
3181 /* Internal procedures are taken care of in resolve_contained_fntype. */
3182 gfc_error ("Function %qs is declared CHARACTER(*) and cannot "
3183 "be used at %L since it is not a dummy argument",
3184 sym
->name
, &expr
->where
);
3188 /* See if function is already resolved. */
3190 if (expr
->value
.function
.name
!= NULL
3191 || expr
->value
.function
.isym
!= NULL
)
3193 if (expr
->ts
.type
== BT_UNKNOWN
)
3199 /* Apply the rules of section 14.1.2. */
3201 switch (procedure_kind (sym
))
3204 t
= resolve_generic_f (expr
);
3207 case PTYPE_SPECIFIC
:
3208 t
= resolve_specific_f (expr
);
3212 t
= resolve_unknown_f (expr
);
3216 gfc_internal_error ("resolve_function(): bad function type");
3220 /* If the expression is still a function (it might have simplified),
3221 then we check to see if we are calling an elemental function. */
3223 if (expr
->expr_type
!= EXPR_FUNCTION
)
3226 temp
= need_full_assumed_size
;
3227 need_full_assumed_size
= 0;
3229 if (!resolve_elemental_actual (expr
, NULL
))
3232 if (omp_workshare_flag
3233 && expr
->value
.function
.esym
3234 && ! gfc_elemental (expr
->value
.function
.esym
))
3236 gfc_error ("User defined non-ELEMENTAL function %qs at %L not allowed "
3237 "in WORKSHARE construct", expr
->value
.function
.esym
->name
,
3242 #define GENERIC_ID expr->value.function.isym->id
3243 else if (expr
->value
.function
.actual
!= NULL
3244 && expr
->value
.function
.isym
!= NULL
3245 && GENERIC_ID
!= GFC_ISYM_LBOUND
3246 && GENERIC_ID
!= GFC_ISYM_LCOBOUND
3247 && GENERIC_ID
!= GFC_ISYM_UCOBOUND
3248 && GENERIC_ID
!= GFC_ISYM_LEN
3249 && GENERIC_ID
!= GFC_ISYM_LOC
3250 && GENERIC_ID
!= GFC_ISYM_C_LOC
3251 && GENERIC_ID
!= GFC_ISYM_PRESENT
)
3253 /* Array intrinsics must also have the last upper bound of an
3254 assumed size array argument. UBOUND and SIZE have to be
3255 excluded from the check if the second argument is anything
3258 for (arg
= expr
->value
.function
.actual
; arg
; arg
= arg
->next
)
3260 if ((GENERIC_ID
== GFC_ISYM_UBOUND
|| GENERIC_ID
== GFC_ISYM_SIZE
)
3261 && arg
== expr
->value
.function
.actual
3262 && arg
->next
!= NULL
&& arg
->next
->expr
)
3264 if (arg
->next
->expr
->expr_type
!= EXPR_CONSTANT
)
3267 if (arg
->next
->name
&& strcmp (arg
->next
->name
, "kind") == 0)
3270 if ((int)mpz_get_si (arg
->next
->expr
->value
.integer
)
3275 if (arg
->expr
!= NULL
3276 && arg
->expr
->rank
> 0
3277 && resolve_assumed_size_actual (arg
->expr
))
3283 need_full_assumed_size
= temp
;
3285 if (!check_pure_function(expr
))
3288 /* Functions without the RECURSIVE attribution are not allowed to
3289 * call themselves. */
3290 if (expr
->value
.function
.esym
&& !expr
->value
.function
.esym
->attr
.recursive
)
3293 esym
= expr
->value
.function
.esym
;
3295 if (is_illegal_recursion (esym
, gfc_current_ns
))
3297 if (esym
->attr
.entry
&& esym
->ns
->entries
)
3298 gfc_error ("ENTRY %qs at %L cannot be called recursively, as"
3299 " function %qs is not RECURSIVE",
3300 esym
->name
, &expr
->where
, esym
->ns
->entries
->sym
->name
);
3302 gfc_error ("Function %qs at %L cannot be called recursively, as it"
3303 " is not RECURSIVE", esym
->name
, &expr
->where
);
3309 /* Character lengths of use associated functions may contains references to
3310 symbols not referenced from the current program unit otherwise. Make sure
3311 those symbols are marked as referenced. */
3313 if (expr
->ts
.type
== BT_CHARACTER
&& expr
->value
.function
.esym
3314 && expr
->value
.function
.esym
->attr
.use_assoc
)
3316 gfc_expr_set_symbols_referenced (expr
->ts
.u
.cl
->length
);
3319 /* Make sure that the expression has a typespec that works. */
3320 if (expr
->ts
.type
== BT_UNKNOWN
)
3322 if (expr
->symtree
->n
.sym
->result
3323 && expr
->symtree
->n
.sym
->result
->ts
.type
!= BT_UNKNOWN
3324 && !expr
->symtree
->n
.sym
->result
->attr
.proc_pointer
)
3325 expr
->ts
= expr
->symtree
->n
.sym
->result
->ts
;
3328 if (!expr
->ref
&& !expr
->value
.function
.isym
)
3330 if (expr
->value
.function
.esym
)
3331 update_current_proc_array_outer_dependency (expr
->value
.function
.esym
);
3333 update_current_proc_array_outer_dependency (sym
);
3336 /* typebound procedure: Assume the worst. */
3337 gfc_current_ns
->proc_name
->attr
.array_outer_dependency
= 1;
3343 /************* Subroutine resolution *************/
3346 pure_subroutine (gfc_symbol
*sym
, const char *name
, locus
*loc
)
3353 gfc_error ("Subroutine call to %qs in FORALL block at %L is not PURE",
3357 else if (gfc_do_concurrent_flag
)
3359 gfc_error ("Subroutine call to %qs in DO CONCURRENT block at %L is not "
3363 else if (gfc_pure (NULL
))
3365 gfc_error ("Subroutine call to %qs at %L is not PURE", name
, loc
);
3369 gfc_unset_implicit_pure (NULL
);
3375 resolve_generic_s0 (gfc_code
*c
, gfc_symbol
*sym
)
3379 if (sym
->attr
.generic
)
3381 s
= gfc_search_interface (sym
->generic
, 1, &c
->ext
.actual
);
3384 c
->resolved_sym
= s
;
3385 if (!pure_subroutine (s
, s
->name
, &c
->loc
))
3390 /* TODO: Need to search for elemental references in generic interface. */
3393 if (sym
->attr
.intrinsic
)
3394 return gfc_intrinsic_sub_interface (c
, 0);
3401 resolve_generic_s (gfc_code
*c
)
3406 sym
= c
->symtree
->n
.sym
;
3410 m
= resolve_generic_s0 (c
, sym
);
3413 else if (m
== MATCH_ERROR
)
3417 if (sym
->ns
->parent
== NULL
)
3419 gfc_find_symbol (sym
->name
, sym
->ns
->parent
, 1, &sym
);
3423 if (!generic_sym (sym
))
3427 /* Last ditch attempt. See if the reference is to an intrinsic
3428 that possesses a matching interface. 14.1.2.4 */
3429 sym
= c
->symtree
->n
.sym
;
3431 if (!gfc_is_intrinsic (sym
, 1, c
->loc
))
3433 gfc_error ("There is no specific subroutine for the generic %qs at %L",
3434 sym
->name
, &c
->loc
);
3438 m
= gfc_intrinsic_sub_interface (c
, 0);
3442 gfc_error ("Generic subroutine %qs at %L is not consistent with an "
3443 "intrinsic subroutine interface", sym
->name
, &c
->loc
);
3449 /* Resolve a subroutine call known to be specific. */
3452 resolve_specific_s0 (gfc_code
*c
, gfc_symbol
*sym
)
3456 if (sym
->attr
.external
|| sym
->attr
.if_source
== IFSRC_IFBODY
)
3458 if (sym
->attr
.dummy
)
3460 sym
->attr
.proc
= PROC_DUMMY
;
3464 sym
->attr
.proc
= PROC_EXTERNAL
;
3468 if (sym
->attr
.proc
== PROC_MODULE
|| sym
->attr
.proc
== PROC_INTERNAL
)
3471 if (sym
->attr
.intrinsic
)
3473 m
= gfc_intrinsic_sub_interface (c
, 1);
3477 gfc_error ("Subroutine %qs at %L is INTRINSIC but is not compatible "
3478 "with an intrinsic", sym
->name
, &c
->loc
);
3486 gfc_procedure_use (sym
, &c
->ext
.actual
, &c
->loc
);
3488 c
->resolved_sym
= sym
;
3489 if (!pure_subroutine (sym
, sym
->name
, &c
->loc
))
3497 resolve_specific_s (gfc_code
*c
)
3502 sym
= c
->symtree
->n
.sym
;
3506 m
= resolve_specific_s0 (c
, sym
);
3509 if (m
== MATCH_ERROR
)
3512 if (sym
->ns
->parent
== NULL
)
3515 gfc_find_symbol (sym
->name
, sym
->ns
->parent
, 1, &sym
);
3521 sym
= c
->symtree
->n
.sym
;
3522 gfc_error ("Unable to resolve the specific subroutine %qs at %L",
3523 sym
->name
, &c
->loc
);
3529 /* Resolve a subroutine call not known to be generic nor specific. */
3532 resolve_unknown_s (gfc_code
*c
)
3536 sym
= c
->symtree
->n
.sym
;
3538 if (sym
->attr
.dummy
)
3540 sym
->attr
.proc
= PROC_DUMMY
;
3544 /* See if we have an intrinsic function reference. */
3546 if (gfc_is_intrinsic (sym
, 1, c
->loc
))
3548 if (gfc_intrinsic_sub_interface (c
, 1) == MATCH_YES
)
3553 /* The reference is to an external name. */
3556 gfc_procedure_use (sym
, &c
->ext
.actual
, &c
->loc
);
3558 c
->resolved_sym
= sym
;
3560 return pure_subroutine (sym
, sym
->name
, &c
->loc
);
3564 /* Resolve a subroutine call. Although it was tempting to use the same code
3565 for functions, subroutines and functions are stored differently and this
3566 makes things awkward. */
3569 resolve_call (gfc_code
*c
)
3572 procedure_type ptype
= PROC_INTRINSIC
;
3573 gfc_symbol
*csym
, *sym
;
3574 bool no_formal_args
;
3576 csym
= c
->symtree
? c
->symtree
->n
.sym
: NULL
;
3578 if (csym
&& csym
->ts
.type
!= BT_UNKNOWN
)
3580 gfc_error ("%qs at %L has a type, which is not consistent with "
3581 "the CALL at %L", csym
->name
, &csym
->declared_at
, &c
->loc
);
3585 if (csym
&& gfc_current_ns
->parent
&& csym
->ns
!= gfc_current_ns
)
3588 gfc_find_sym_tree (c
->symtree
->name
, gfc_current_ns
, 1, &st
);
3589 sym
= st
? st
->n
.sym
: NULL
;
3590 if (sym
&& csym
!= sym
3591 && sym
->ns
== gfc_current_ns
3592 && sym
->attr
.flavor
== FL_PROCEDURE
3593 && sym
->attr
.contained
)
3596 if (csym
->attr
.generic
)
3597 c
->symtree
->n
.sym
= sym
;
3600 csym
= c
->symtree
->n
.sym
;
3604 /* If this ia a deferred TBP, c->expr1 will be set. */
3605 if (!c
->expr1
&& csym
)
3607 if (csym
->attr
.abstract
)
3609 gfc_error ("ABSTRACT INTERFACE %qs must not be referenced at %L",
3610 csym
->name
, &c
->loc
);
3614 /* Subroutines without the RECURSIVE attribution are not allowed to
3616 if (is_illegal_recursion (csym
, gfc_current_ns
))
3618 if (csym
->attr
.entry
&& csym
->ns
->entries
)
3619 gfc_error ("ENTRY %qs at %L cannot be called recursively, "
3620 "as subroutine %qs is not RECURSIVE",
3621 csym
->name
, &c
->loc
, csym
->ns
->entries
->sym
->name
);
3623 gfc_error ("SUBROUTINE %qs at %L cannot be called recursively, "
3624 "as it is not RECURSIVE", csym
->name
, &c
->loc
);
3630 /* Switch off assumed size checking and do this again for certain kinds
3631 of procedure, once the procedure itself is resolved. */
3632 need_full_assumed_size
++;
3635 ptype
= csym
->attr
.proc
;
3637 no_formal_args
= csym
&& is_external_proc (csym
)
3638 && gfc_sym_get_dummy_args (csym
) == NULL
;
3639 if (!resolve_actual_arglist (c
->ext
.actual
, ptype
, no_formal_args
))
3642 /* Resume assumed_size checking. */
3643 need_full_assumed_size
--;
3645 /* If external, check for usage. */
3646 if (csym
&& is_external_proc (csym
))
3647 resolve_global_procedure (csym
, &c
->loc
, &c
->ext
.actual
, 1);
3650 if (c
->resolved_sym
== NULL
)
3652 c
->resolved_isym
= NULL
;
3653 switch (procedure_kind (csym
))
3656 t
= resolve_generic_s (c
);
3659 case PTYPE_SPECIFIC
:
3660 t
= resolve_specific_s (c
);
3664 t
= resolve_unknown_s (c
);
3668 gfc_internal_error ("resolve_subroutine(): bad function type");
3672 /* Some checks of elemental subroutine actual arguments. */
3673 if (!resolve_elemental_actual (NULL
, c
))
3677 update_current_proc_array_outer_dependency (csym
);
3679 /* Typebound procedure: Assume the worst. */
3680 gfc_current_ns
->proc_name
->attr
.array_outer_dependency
= 1;
3686 /* Compare the shapes of two arrays that have non-NULL shapes. If both
3687 op1->shape and op2->shape are non-NULL return true if their shapes
3688 match. If both op1->shape and op2->shape are non-NULL return false
3689 if their shapes do not match. If either op1->shape or op2->shape is
3690 NULL, return true. */
3693 compare_shapes (gfc_expr
*op1
, gfc_expr
*op2
)
3700 if (op1
->shape
!= NULL
&& op2
->shape
!= NULL
)
3702 for (i
= 0; i
< op1
->rank
; i
++)
3704 if (mpz_cmp (op1
->shape
[i
], op2
->shape
[i
]) != 0)
3706 gfc_error ("Shapes for operands at %L and %L are not conformable",
3707 &op1
->where
, &op2
->where
);
3717 /* Convert a logical operator to the corresponding bitwise intrinsic call.
3718 For example A .AND. B becomes IAND(A, B). */
3720 logical_to_bitwise (gfc_expr
*e
)
3722 gfc_expr
*tmp
, *op1
, *op2
;
3724 gfc_actual_arglist
*args
= NULL
;
3726 gcc_assert (e
->expr_type
== EXPR_OP
);
3728 isym
= GFC_ISYM_NONE
;
3729 op1
= e
->value
.op
.op1
;
3730 op2
= e
->value
.op
.op2
;
3732 switch (e
->value
.op
.op
)
3735 isym
= GFC_ISYM_NOT
;
3738 isym
= GFC_ISYM_IAND
;
3741 isym
= GFC_ISYM_IOR
;
3743 case INTRINSIC_NEQV
:
3744 isym
= GFC_ISYM_IEOR
;
3747 /* "Bitwise eqv" is just the complement of NEQV === IEOR.
3748 Change the old expression to NEQV, which will get replaced by IEOR,
3749 and wrap it in NOT. */
3750 tmp
= gfc_copy_expr (e
);
3751 tmp
->value
.op
.op
= INTRINSIC_NEQV
;
3752 tmp
= logical_to_bitwise (tmp
);
3753 isym
= GFC_ISYM_NOT
;
3758 gfc_internal_error ("logical_to_bitwise(): Bad intrinsic");
3761 /* Inherit the original operation's operands as arguments. */
3762 args
= gfc_get_actual_arglist ();
3766 args
->next
= gfc_get_actual_arglist ();
3767 args
->next
->expr
= op2
;
3770 /* Convert the expression to a function call. */
3771 e
->expr_type
= EXPR_FUNCTION
;
3772 e
->value
.function
.actual
= args
;
3773 e
->value
.function
.isym
= gfc_intrinsic_function_by_id (isym
);
3774 e
->value
.function
.name
= e
->value
.function
.isym
->name
;
3775 e
->value
.function
.esym
= NULL
;
3777 /* Make up a pre-resolved function call symtree if we need to. */
3778 if (!e
->symtree
|| !e
->symtree
->n
.sym
)
3781 gfc_get_ha_sym_tree (e
->value
.function
.isym
->name
, &e
->symtree
);
3782 sym
= e
->symtree
->n
.sym
;
3784 sym
->attr
.flavor
= FL_PROCEDURE
;
3785 sym
->attr
.function
= 1;
3786 sym
->attr
.elemental
= 1;
3788 sym
->attr
.referenced
= 1;
3789 gfc_intrinsic_symbol (sym
);
3790 gfc_commit_symbol (sym
);
3793 args
->name
= e
->value
.function
.isym
->formal
->name
;
3794 if (e
->value
.function
.isym
->formal
->next
)
3795 args
->next
->name
= e
->value
.function
.isym
->formal
->next
->name
;
3800 /* Recursively append candidate UOP to CANDIDATES. Store the number of
3801 candidates in CANDIDATES_LEN. */
3803 lookup_uop_fuzzy_find_candidates (gfc_symtree
*uop
,
3805 size_t &candidates_len
)
3812 /* Not sure how to properly filter here. Use all for a start.
3813 n.uop.op is NULL for empty interface operators (is that legal?) disregard
3814 these as i suppose they don't make terribly sense. */
3816 if (uop
->n
.uop
->op
!= NULL
)
3817 vec_push (candidates
, candidates_len
, uop
->name
);
3821 lookup_uop_fuzzy_find_candidates (p
, candidates
, candidates_len
);
3825 lookup_uop_fuzzy_find_candidates (p
, candidates
, candidates_len
);
3828 /* Lookup user-operator OP fuzzily, taking names in UOP into account. */
3831 lookup_uop_fuzzy (const char *op
, gfc_symtree
*uop
)
3833 char **candidates
= NULL
;
3834 size_t candidates_len
= 0;
3835 lookup_uop_fuzzy_find_candidates (uop
, candidates
, candidates_len
);
3836 return gfc_closest_fuzzy_match (op
, candidates
);
3840 /* Callback finding an impure function as an operand to an .and. or
3841 .or. expression. Remember the last function warned about to
3842 avoid double warnings when recursing. */
3845 impure_function_callback (gfc_expr
**e
, int *walk_subtrees ATTRIBUTE_UNUSED
,
3850 static gfc_expr
*last
= NULL
;
3851 bool *found
= (bool *) data
;
3853 if (f
->expr_type
== EXPR_FUNCTION
)
3856 if (f
!= last
&& !gfc_pure_function (f
, &name
)
3857 && !gfc_implicit_pure_function (f
))
3860 gfc_warning (OPT_Wfunction_elimination
,
3861 "Impure function %qs at %L might not be evaluated",
3864 gfc_warning (OPT_Wfunction_elimination
,
3865 "Impure function at %L might not be evaluated",
3875 /* Resolve an operator expression node. This can involve replacing the
3876 operation with a user defined function call. */
3879 resolve_operator (gfc_expr
*e
)
3881 gfc_expr
*op1
, *op2
;
3883 bool dual_locus_error
;
3886 /* Resolve all subnodes-- give them types. */
3888 switch (e
->value
.op
.op
)
3891 if (!gfc_resolve_expr (e
->value
.op
.op2
))
3897 case INTRINSIC_UPLUS
:
3898 case INTRINSIC_UMINUS
:
3899 case INTRINSIC_PARENTHESES
:
3900 if (!gfc_resolve_expr (e
->value
.op
.op1
))
3905 /* Typecheck the new node. */
3907 op1
= e
->value
.op
.op1
;
3908 op2
= e
->value
.op
.op2
;
3909 dual_locus_error
= false;
3911 if ((op1
&& op1
->expr_type
== EXPR_NULL
)
3912 || (op2
&& op2
->expr_type
== EXPR_NULL
))
3914 sprintf (msg
, _("Invalid context for NULL() pointer at %%L"));
3918 switch (e
->value
.op
.op
)
3920 case INTRINSIC_UPLUS
:
3921 case INTRINSIC_UMINUS
:
3922 if (op1
->ts
.type
== BT_INTEGER
3923 || op1
->ts
.type
== BT_REAL
3924 || op1
->ts
.type
== BT_COMPLEX
)
3930 sprintf (msg
, _("Operand of unary numeric operator %%<%s%%> at %%L is %s"),
3931 gfc_op2string (e
->value
.op
.op
), gfc_typename (&e
->ts
));
3934 case INTRINSIC_PLUS
:
3935 case INTRINSIC_MINUS
:
3936 case INTRINSIC_TIMES
:
3937 case INTRINSIC_DIVIDE
:
3938 case INTRINSIC_POWER
:
3939 if (gfc_numeric_ts (&op1
->ts
) && gfc_numeric_ts (&op2
->ts
))
3941 gfc_type_convert_binary (e
, 1);
3945 if (op1
->ts
.type
== BT_DERIVED
|| op2
->ts
.type
== BT_DERIVED
)
3947 _("Unexpected derived-type entities in binary intrinsic "
3948 "numeric operator %%<%s%%> at %%L"),
3949 gfc_op2string (e
->value
.op
.op
));
3952 _("Operands of binary numeric operator %%<%s%%> at %%L are %s/%s"),
3953 gfc_op2string (e
->value
.op
.op
), gfc_typename (&op1
->ts
),
3954 gfc_typename (&op2
->ts
));
3957 case INTRINSIC_CONCAT
:
3958 if (op1
->ts
.type
== BT_CHARACTER
&& op2
->ts
.type
== BT_CHARACTER
3959 && op1
->ts
.kind
== op2
->ts
.kind
)
3961 e
->ts
.type
= BT_CHARACTER
;
3962 e
->ts
.kind
= op1
->ts
.kind
;
3967 _("Operands of string concatenation operator at %%L are %s/%s"),
3968 gfc_typename (&op1
->ts
), gfc_typename (&op2
->ts
));
3974 case INTRINSIC_NEQV
:
3975 if (op1
->ts
.type
== BT_LOGICAL
&& op2
->ts
.type
== BT_LOGICAL
)
3977 e
->ts
.type
= BT_LOGICAL
;
3978 e
->ts
.kind
= gfc_kind_max (op1
, op2
);
3979 if (op1
->ts
.kind
< e
->ts
.kind
)
3980 gfc_convert_type (op1
, &e
->ts
, 2);
3981 else if (op2
->ts
.kind
< e
->ts
.kind
)
3982 gfc_convert_type (op2
, &e
->ts
, 2);
3984 if (flag_frontend_optimize
&&
3985 (e
->value
.op
.op
== INTRINSIC_AND
|| e
->value
.op
.op
== INTRINSIC_OR
))
3987 /* Warn about short-circuiting
3988 with impure function as second operand. */
3990 gfc_expr_walker (&op2
, impure_function_callback
, &op2_f
);
3995 /* Logical ops on integers become bitwise ops with -fdec. */
3997 && (op1
->ts
.type
== BT_INTEGER
|| op2
->ts
.type
== BT_INTEGER
))
3999 e
->ts
.type
= BT_INTEGER
;
4000 e
->ts
.kind
= gfc_kind_max (op1
, op2
);
4001 if (op1
->ts
.type
!= e
->ts
.type
|| op1
->ts
.kind
!= e
->ts
.kind
)
4002 gfc_convert_type (op1
, &e
->ts
, 1);
4003 if (op2
->ts
.type
!= e
->ts
.type
|| op2
->ts
.kind
!= e
->ts
.kind
)
4004 gfc_convert_type (op2
, &e
->ts
, 1);
4005 e
= logical_to_bitwise (e
);
4009 sprintf (msg
, _("Operands of logical operator %%<%s%%> at %%L are %s/%s"),
4010 gfc_op2string (e
->value
.op
.op
), gfc_typename (&op1
->ts
),
4011 gfc_typename (&op2
->ts
));
4016 /* Logical ops on integers become bitwise ops with -fdec. */
4017 if (flag_dec
&& op1
->ts
.type
== BT_INTEGER
)
4019 e
->ts
.type
= BT_INTEGER
;
4020 e
->ts
.kind
= op1
->ts
.kind
;
4021 e
= logical_to_bitwise (e
);
4025 if (op1
->ts
.type
== BT_LOGICAL
)
4027 e
->ts
.type
= BT_LOGICAL
;
4028 e
->ts
.kind
= op1
->ts
.kind
;
4032 sprintf (msg
, _("Operand of .not. operator at %%L is %s"),
4033 gfc_typename (&op1
->ts
));
4037 case INTRINSIC_GT_OS
:
4039 case INTRINSIC_GE_OS
:
4041 case INTRINSIC_LT_OS
:
4043 case INTRINSIC_LE_OS
:
4044 if (op1
->ts
.type
== BT_COMPLEX
|| op2
->ts
.type
== BT_COMPLEX
)
4046 strcpy (msg
, _("COMPLEX quantities cannot be compared at %L"));
4053 case INTRINSIC_EQ_OS
:
4055 case INTRINSIC_NE_OS
:
4056 if (op1
->ts
.type
== BT_CHARACTER
&& op2
->ts
.type
== BT_CHARACTER
4057 && op1
->ts
.kind
== op2
->ts
.kind
)
4059 e
->ts
.type
= BT_LOGICAL
;
4060 e
->ts
.kind
= gfc_default_logical_kind
;
4064 if (gfc_numeric_ts (&op1
->ts
) && gfc_numeric_ts (&op2
->ts
))
4066 gfc_type_convert_binary (e
, 1);
4068 e
->ts
.type
= BT_LOGICAL
;
4069 e
->ts
.kind
= gfc_default_logical_kind
;
4071 if (warn_compare_reals
)
4073 gfc_intrinsic_op op
= e
->value
.op
.op
;
4075 /* Type conversion has made sure that the types of op1 and op2
4076 agree, so it is only necessary to check the first one. */
4077 if ((op1
->ts
.type
== BT_REAL
|| op1
->ts
.type
== BT_COMPLEX
)
4078 && (op
== INTRINSIC_EQ
|| op
== INTRINSIC_EQ_OS
4079 || op
== INTRINSIC_NE
|| op
== INTRINSIC_NE_OS
))
4083 if (op
== INTRINSIC_EQ
|| op
== INTRINSIC_EQ_OS
)
4084 msg
= "Equality comparison for %s at %L";
4086 msg
= "Inequality comparison for %s at %L";
4088 gfc_warning (OPT_Wcompare_reals
, msg
,
4089 gfc_typename (&op1
->ts
), &op1
->where
);
4096 if (op1
->ts
.type
== BT_LOGICAL
&& op2
->ts
.type
== BT_LOGICAL
)
4098 _("Logicals at %%L must be compared with %s instead of %s"),
4099 (e
->value
.op
.op
== INTRINSIC_EQ
4100 || e
->value
.op
.op
== INTRINSIC_EQ_OS
)
4101 ? ".eqv." : ".neqv.", gfc_op2string (e
->value
.op
.op
));
4104 _("Operands of comparison operator %%<%s%%> at %%L are %s/%s"),
4105 gfc_op2string (e
->value
.op
.op
), gfc_typename (&op1
->ts
),
4106 gfc_typename (&op2
->ts
));
4110 case INTRINSIC_USER
:
4111 if (e
->value
.op
.uop
->op
== NULL
)
4113 const char *name
= e
->value
.op
.uop
->name
;
4114 const char *guessed
;
4115 guessed
= lookup_uop_fuzzy (name
, e
->value
.op
.uop
->ns
->uop_root
);
4117 sprintf (msg
, _("Unknown operator %%<%s%%> at %%L; did you mean '%s'?"),
4120 sprintf (msg
, _("Unknown operator %%<%s%%> at %%L"), name
);
4122 else if (op2
== NULL
)
4123 sprintf (msg
, _("Operand of user operator %%<%s%%> at %%L is %s"),
4124 e
->value
.op
.uop
->name
, gfc_typename (&op1
->ts
));
4127 sprintf (msg
, _("Operands of user operator %%<%s%%> at %%L are %s/%s"),
4128 e
->value
.op
.uop
->name
, gfc_typename (&op1
->ts
),
4129 gfc_typename (&op2
->ts
));
4130 e
->value
.op
.uop
->op
->sym
->attr
.referenced
= 1;
4135 case INTRINSIC_PARENTHESES
:
4137 if (e
->ts
.type
== BT_CHARACTER
)
4138 e
->ts
.u
.cl
= op1
->ts
.u
.cl
;
4142 gfc_internal_error ("resolve_operator(): Bad intrinsic");
4145 /* Deal with arrayness of an operand through an operator. */
4147 switch (e
->value
.op
.op
)
4149 case INTRINSIC_PLUS
:
4150 case INTRINSIC_MINUS
:
4151 case INTRINSIC_TIMES
:
4152 case INTRINSIC_DIVIDE
:
4153 case INTRINSIC_POWER
:
4154 case INTRINSIC_CONCAT
:
4158 case INTRINSIC_NEQV
:
4160 case INTRINSIC_EQ_OS
:
4162 case INTRINSIC_NE_OS
:
4164 case INTRINSIC_GT_OS
:
4166 case INTRINSIC_GE_OS
:
4168 case INTRINSIC_LT_OS
:
4170 case INTRINSIC_LE_OS
:
4172 if (op1
->rank
== 0 && op2
->rank
== 0)
4175 if (op1
->rank
== 0 && op2
->rank
!= 0)
4177 e
->rank
= op2
->rank
;
4179 if (e
->shape
== NULL
)
4180 e
->shape
= gfc_copy_shape (op2
->shape
, op2
->rank
);
4183 if (op1
->rank
!= 0 && op2
->rank
== 0)
4185 e
->rank
= op1
->rank
;
4187 if (e
->shape
== NULL
)
4188 e
->shape
= gfc_copy_shape (op1
->shape
, op1
->rank
);
4191 if (op1
->rank
!= 0 && op2
->rank
!= 0)
4193 if (op1
->rank
== op2
->rank
)
4195 e
->rank
= op1
->rank
;
4196 if (e
->shape
== NULL
)
4198 t
= compare_shapes (op1
, op2
);
4202 e
->shape
= gfc_copy_shape (op1
->shape
, op1
->rank
);
4207 /* Allow higher level expressions to work. */
4210 /* Try user-defined operators, and otherwise throw an error. */
4211 dual_locus_error
= true;
4213 _("Inconsistent ranks for operator at %%L and %%L"));
4220 case INTRINSIC_PARENTHESES
:
4222 case INTRINSIC_UPLUS
:
4223 case INTRINSIC_UMINUS
:
4224 /* Simply copy arrayness attribute */
4225 e
->rank
= op1
->rank
;
4227 if (e
->shape
== NULL
)
4228 e
->shape
= gfc_copy_shape (op1
->shape
, op1
->rank
);
4238 /* Attempt to simplify the expression. */
4241 t
= gfc_simplify_expr (e
, 0);
4242 /* Some calls do not succeed in simplification and return false
4243 even though there is no error; e.g. variable references to
4244 PARAMETER arrays. */
4245 if (!gfc_is_constant_expr (e
))
4253 match m
= gfc_extend_expr (e
);
4256 if (m
== MATCH_ERROR
)
4260 if (dual_locus_error
)
4261 gfc_error (msg
, &op1
->where
, &op2
->where
);
4263 gfc_error (msg
, &e
->where
);
4269 /************** Array resolution subroutines **************/
4272 { CMP_LT
, CMP_EQ
, CMP_GT
, CMP_UNKNOWN
};
4274 /* Compare two integer expressions. */
4276 static compare_result
4277 compare_bound (gfc_expr
*a
, gfc_expr
*b
)
4281 if (a
== NULL
|| a
->expr_type
!= EXPR_CONSTANT
4282 || b
== NULL
|| b
->expr_type
!= EXPR_CONSTANT
)
4285 /* If either of the types isn't INTEGER, we must have
4286 raised an error earlier. */
4288 if (a
->ts
.type
!= BT_INTEGER
|| b
->ts
.type
!= BT_INTEGER
)
4291 i
= mpz_cmp (a
->value
.integer
, b
->value
.integer
);
4301 /* Compare an integer expression with an integer. */
4303 static compare_result
4304 compare_bound_int (gfc_expr
*a
, int b
)
4308 if (a
== NULL
|| a
->expr_type
!= EXPR_CONSTANT
)
4311 if (a
->ts
.type
!= BT_INTEGER
)
4312 gfc_internal_error ("compare_bound_int(): Bad expression");
4314 i
= mpz_cmp_si (a
->value
.integer
, b
);
4324 /* Compare an integer expression with a mpz_t. */
4326 static compare_result
4327 compare_bound_mpz_t (gfc_expr
*a
, mpz_t b
)
4331 if (a
== NULL
|| a
->expr_type
!= EXPR_CONSTANT
)
4334 if (a
->ts
.type
!= BT_INTEGER
)
4335 gfc_internal_error ("compare_bound_int(): Bad expression");
4337 i
= mpz_cmp (a
->value
.integer
, b
);
4347 /* Compute the last value of a sequence given by a triplet.
4348 Return 0 if it wasn't able to compute the last value, or if the
4349 sequence if empty, and 1 otherwise. */
4352 compute_last_value_for_triplet (gfc_expr
*start
, gfc_expr
*end
,
4353 gfc_expr
*stride
, mpz_t last
)
4357 if (start
== NULL
|| start
->expr_type
!= EXPR_CONSTANT
4358 || end
== NULL
|| end
->expr_type
!= EXPR_CONSTANT
4359 || (stride
!= NULL
&& stride
->expr_type
!= EXPR_CONSTANT
))
4362 if (start
->ts
.type
!= BT_INTEGER
|| end
->ts
.type
!= BT_INTEGER
4363 || (stride
!= NULL
&& stride
->ts
.type
!= BT_INTEGER
))
4366 if (stride
== NULL
|| compare_bound_int (stride
, 1) == CMP_EQ
)
4368 if (compare_bound (start
, end
) == CMP_GT
)
4370 mpz_set (last
, end
->value
.integer
);
4374 if (compare_bound_int (stride
, 0) == CMP_GT
)
4376 /* Stride is positive */
4377 if (mpz_cmp (start
->value
.integer
, end
->value
.integer
) > 0)
4382 /* Stride is negative */
4383 if (mpz_cmp (start
->value
.integer
, end
->value
.integer
) < 0)
4388 mpz_sub (rem
, end
->value
.integer
, start
->value
.integer
);
4389 mpz_tdiv_r (rem
, rem
, stride
->value
.integer
);
4390 mpz_sub (last
, end
->value
.integer
, rem
);
4397 /* Compare a single dimension of an array reference to the array
4401 check_dimension (int i
, gfc_array_ref
*ar
, gfc_array_spec
*as
)
4405 if (ar
->dimen_type
[i
] == DIMEN_STAR
)
4407 gcc_assert (ar
->stride
[i
] == NULL
);
4408 /* This implies [*] as [*:] and [*:3] are not possible. */
4409 if (ar
->start
[i
] == NULL
)
4411 gcc_assert (ar
->end
[i
] == NULL
);
4416 /* Given start, end and stride values, calculate the minimum and
4417 maximum referenced indexes. */
4419 switch (ar
->dimen_type
[i
])
4422 case DIMEN_THIS_IMAGE
:
4427 if (compare_bound (ar
->start
[i
], as
->lower
[i
]) == CMP_LT
)
4430 gfc_warning (0, "Array reference at %L is out of bounds "
4431 "(%ld < %ld) in dimension %d", &ar
->c_where
[i
],
4432 mpz_get_si (ar
->start
[i
]->value
.integer
),
4433 mpz_get_si (as
->lower
[i
]->value
.integer
), i
+1);
4435 gfc_warning (0, "Array reference at %L is out of bounds "
4436 "(%ld < %ld) in codimension %d", &ar
->c_where
[i
],
4437 mpz_get_si (ar
->start
[i
]->value
.integer
),
4438 mpz_get_si (as
->lower
[i
]->value
.integer
),
4442 if (compare_bound (ar
->start
[i
], as
->upper
[i
]) == CMP_GT
)
4445 gfc_warning (0, "Array reference at %L is out of bounds "
4446 "(%ld > %ld) in dimension %d", &ar
->c_where
[i
],
4447 mpz_get_si (ar
->start
[i
]->value
.integer
),
4448 mpz_get_si (as
->upper
[i
]->value
.integer
), i
+1);
4450 gfc_warning (0, "Array reference at %L is out of bounds "
4451 "(%ld > %ld) in codimension %d", &ar
->c_where
[i
],
4452 mpz_get_si (ar
->start
[i
]->value
.integer
),
4453 mpz_get_si (as
->upper
[i
]->value
.integer
),
4462 #define AR_START (ar->start[i] ? ar->start[i] : as->lower[i])
4463 #define AR_END (ar->end[i] ? ar->end[i] : as->upper[i])
4465 compare_result comp_start_end
= compare_bound (AR_START
, AR_END
);
4467 /* Check for zero stride, which is not allowed. */
4468 if (compare_bound_int (ar
->stride
[i
], 0) == CMP_EQ
)
4470 gfc_error ("Illegal stride of zero at %L", &ar
->c_where
[i
]);
4474 /* if start == len || (stride > 0 && start < len)
4475 || (stride < 0 && start > len),
4476 then the array section contains at least one element. In this
4477 case, there is an out-of-bounds access if
4478 (start < lower || start > upper). */
4479 if (compare_bound (AR_START
, AR_END
) == CMP_EQ
4480 || ((compare_bound_int (ar
->stride
[i
], 0) == CMP_GT
4481 || ar
->stride
[i
] == NULL
) && comp_start_end
== CMP_LT
)
4482 || (compare_bound_int (ar
->stride
[i
], 0) == CMP_LT
4483 && comp_start_end
== CMP_GT
))
4485 if (compare_bound (AR_START
, as
->lower
[i
]) == CMP_LT
)
4487 gfc_warning (0, "Lower array reference at %L is out of bounds "
4488 "(%ld < %ld) in dimension %d", &ar
->c_where
[i
],
4489 mpz_get_si (AR_START
->value
.integer
),
4490 mpz_get_si (as
->lower
[i
]->value
.integer
), i
+1);
4493 if (compare_bound (AR_START
, as
->upper
[i
]) == CMP_GT
)
4495 gfc_warning (0, "Lower array reference at %L is out of bounds "
4496 "(%ld > %ld) in dimension %d", &ar
->c_where
[i
],
4497 mpz_get_si (AR_START
->value
.integer
),
4498 mpz_get_si (as
->upper
[i
]->value
.integer
), i
+1);
4503 /* If we can compute the highest index of the array section,
4504 then it also has to be between lower and upper. */
4505 mpz_init (last_value
);
4506 if (compute_last_value_for_triplet (AR_START
, AR_END
, ar
->stride
[i
],
4509 if (compare_bound_mpz_t (as
->lower
[i
], last_value
) == CMP_GT
)
4511 gfc_warning (0, "Upper array reference at %L is out of bounds "
4512 "(%ld < %ld) in dimension %d", &ar
->c_where
[i
],
4513 mpz_get_si (last_value
),
4514 mpz_get_si (as
->lower
[i
]->value
.integer
), i
+1);
4515 mpz_clear (last_value
);
4518 if (compare_bound_mpz_t (as
->upper
[i
], last_value
) == CMP_LT
)
4520 gfc_warning (0, "Upper array reference at %L is out of bounds "
4521 "(%ld > %ld) in dimension %d", &ar
->c_where
[i
],
4522 mpz_get_si (last_value
),
4523 mpz_get_si (as
->upper
[i
]->value
.integer
), i
+1);
4524 mpz_clear (last_value
);
4528 mpz_clear (last_value
);
4536 gfc_internal_error ("check_dimension(): Bad array reference");
4543 /* Compare an array reference with an array specification. */
4546 compare_spec_to_ref (gfc_array_ref
*ar
)
4553 /* TODO: Full array sections are only allowed as actual parameters. */
4554 if (as
->type
== AS_ASSUMED_SIZE
4555 && (/*ar->type == AR_FULL
4556 ||*/ (ar
->type
== AR_SECTION
4557 && ar
->dimen_type
[i
] == DIMEN_RANGE
&& ar
->end
[i
] == NULL
)))
4559 gfc_error ("Rightmost upper bound of assumed size array section "
4560 "not specified at %L", &ar
->where
);
4564 if (ar
->type
== AR_FULL
)
4567 if (as
->rank
!= ar
->dimen
)
4569 gfc_error ("Rank mismatch in array reference at %L (%d/%d)",
4570 &ar
->where
, ar
->dimen
, as
->rank
);
4574 /* ar->codimen == 0 is a local array. */
4575 if (as
->corank
!= ar
->codimen
&& ar
->codimen
!= 0)
4577 gfc_error ("Coindex rank mismatch in array reference at %L (%d/%d)",
4578 &ar
->where
, ar
->codimen
, as
->corank
);
4582 for (i
= 0; i
< as
->rank
; i
++)
4583 if (!check_dimension (i
, ar
, as
))
4586 /* Local access has no coarray spec. */
4587 if (ar
->codimen
!= 0)
4588 for (i
= as
->rank
; i
< as
->rank
+ as
->corank
; i
++)
4590 if (ar
->dimen_type
[i
] != DIMEN_ELEMENT
&& !ar
->in_allocate
4591 && ar
->dimen_type
[i
] != DIMEN_THIS_IMAGE
)
4593 gfc_error ("Coindex of codimension %d must be a scalar at %L",
4594 i
+ 1 - as
->rank
, &ar
->where
);
4597 if (!check_dimension (i
, ar
, as
))
4605 /* Resolve one part of an array index. */
4608 gfc_resolve_index_1 (gfc_expr
*index
, int check_scalar
,
4609 int force_index_integer_kind
)
4616 if (!gfc_resolve_expr (index
))
4619 if (check_scalar
&& index
->rank
!= 0)
4621 gfc_error ("Array index at %L must be scalar", &index
->where
);
4625 if (index
->ts
.type
!= BT_INTEGER
&& index
->ts
.type
!= BT_REAL
)
4627 gfc_error ("Array index at %L must be of INTEGER type, found %s",
4628 &index
->where
, gfc_basic_typename (index
->ts
.type
));
4632 if (index
->ts
.type
== BT_REAL
)
4633 if (!gfc_notify_std (GFC_STD_LEGACY
, "REAL array index at %L",
4637 if ((index
->ts
.kind
!= gfc_index_integer_kind
4638 && force_index_integer_kind
)
4639 || index
->ts
.type
!= BT_INTEGER
)
4642 ts
.type
= BT_INTEGER
;
4643 ts
.kind
= gfc_index_integer_kind
;
4645 gfc_convert_type_warn (index
, &ts
, 2, 0);
4651 /* Resolve one part of an array index. */
4654 gfc_resolve_index (gfc_expr
*index
, int check_scalar
)
4656 return gfc_resolve_index_1 (index
, check_scalar
, 1);
4659 /* Resolve a dim argument to an intrinsic function. */
4662 gfc_resolve_dim_arg (gfc_expr
*dim
)
4667 if (!gfc_resolve_expr (dim
))
4672 gfc_error ("Argument dim at %L must be scalar", &dim
->where
);
4677 if (dim
->ts
.type
!= BT_INTEGER
)
4679 gfc_error ("Argument dim at %L must be of INTEGER type", &dim
->where
);
4683 if (dim
->ts
.kind
!= gfc_index_integer_kind
)
4688 ts
.type
= BT_INTEGER
;
4689 ts
.kind
= gfc_index_integer_kind
;
4691 gfc_convert_type_warn (dim
, &ts
, 2, 0);
4697 /* Given an expression that contains array references, update those array
4698 references to point to the right array specifications. While this is
4699 filled in during matching, this information is difficult to save and load
4700 in a module, so we take care of it here.
4702 The idea here is that the original array reference comes from the
4703 base symbol. We traverse the list of reference structures, setting
4704 the stored reference to references. Component references can
4705 provide an additional array specification. */
4708 find_array_spec (gfc_expr
*e
)
4714 if (e
->symtree
->n
.sym
->ts
.type
== BT_CLASS
)
4715 as
= CLASS_DATA (e
->symtree
->n
.sym
)->as
;
4717 as
= e
->symtree
->n
.sym
->as
;
4719 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
4724 gfc_internal_error ("find_array_spec(): Missing spec");
4731 c
= ref
->u
.c
.component
;
4732 if (c
->attr
.dimension
)
4735 gfc_internal_error ("find_array_spec(): unused as(1)");
4747 gfc_internal_error ("find_array_spec(): unused as(2)");
4751 /* Resolve an array reference. */
4754 resolve_array_ref (gfc_array_ref
*ar
)
4756 int i
, check_scalar
;
4759 for (i
= 0; i
< ar
->dimen
+ ar
->codimen
; i
++)
4761 check_scalar
= ar
->dimen_type
[i
] == DIMEN_RANGE
;
4763 /* Do not force gfc_index_integer_kind for the start. We can
4764 do fine with any integer kind. This avoids temporary arrays
4765 created for indexing with a vector. */
4766 if (!gfc_resolve_index_1 (ar
->start
[i
], check_scalar
, 0))
4768 if (!gfc_resolve_index (ar
->end
[i
], check_scalar
))
4770 if (!gfc_resolve_index (ar
->stride
[i
], check_scalar
))
4775 if (ar
->dimen_type
[i
] == DIMEN_UNKNOWN
)
4779 ar
->dimen_type
[i
] = DIMEN_ELEMENT
;
4783 ar
->dimen_type
[i
] = DIMEN_VECTOR
;
4784 if (e
->expr_type
== EXPR_VARIABLE
4785 && e
->symtree
->n
.sym
->ts
.type
== BT_DERIVED
)
4786 ar
->start
[i
] = gfc_get_parentheses (e
);
4790 gfc_error ("Array index at %L is an array of rank %d",
4791 &ar
->c_where
[i
], e
->rank
);
4795 /* Fill in the upper bound, which may be lower than the
4796 specified one for something like a(2:10:5), which is
4797 identical to a(2:7:5). Only relevant for strides not equal
4798 to one. Don't try a division by zero. */
4799 if (ar
->dimen_type
[i
] == DIMEN_RANGE
4800 && ar
->stride
[i
] != NULL
&& ar
->stride
[i
]->expr_type
== EXPR_CONSTANT
4801 && mpz_cmp_si (ar
->stride
[i
]->value
.integer
, 1L) != 0
4802 && mpz_cmp_si (ar
->stride
[i
]->value
.integer
, 0L) != 0)
4806 if (gfc_ref_dimen_size (ar
, i
, &size
, &end
))
4808 if (ar
->end
[i
] == NULL
)
4811 gfc_get_constant_expr (BT_INTEGER
, gfc_index_integer_kind
,
4813 mpz_set (ar
->end
[i
]->value
.integer
, end
);
4815 else if (ar
->end
[i
]->ts
.type
== BT_INTEGER
4816 && ar
->end
[i
]->expr_type
== EXPR_CONSTANT
)
4818 mpz_set (ar
->end
[i
]->value
.integer
, end
);
4829 if (ar
->type
== AR_FULL
)
4831 if (ar
->as
->rank
== 0)
4832 ar
->type
= AR_ELEMENT
;
4834 /* Make sure array is the same as array(:,:), this way
4835 we don't need to special case all the time. */
4836 ar
->dimen
= ar
->as
->rank
;
4837 for (i
= 0; i
< ar
->dimen
; i
++)
4839 ar
->dimen_type
[i
] = DIMEN_RANGE
;
4841 gcc_assert (ar
->start
[i
] == NULL
);
4842 gcc_assert (ar
->end
[i
] == NULL
);
4843 gcc_assert (ar
->stride
[i
] == NULL
);
4847 /* If the reference type is unknown, figure out what kind it is. */
4849 if (ar
->type
== AR_UNKNOWN
)
4851 ar
->type
= AR_ELEMENT
;
4852 for (i
= 0; i
< ar
->dimen
; i
++)
4853 if (ar
->dimen_type
[i
] == DIMEN_RANGE
4854 || ar
->dimen_type
[i
] == DIMEN_VECTOR
)
4856 ar
->type
= AR_SECTION
;
4861 if (!ar
->as
->cray_pointee
&& !compare_spec_to_ref (ar
))
4864 if (ar
->as
->corank
&& ar
->codimen
== 0)
4867 ar
->codimen
= ar
->as
->corank
;
4868 for (n
= ar
->dimen
; n
< ar
->dimen
+ ar
->codimen
; n
++)
4869 ar
->dimen_type
[n
] = DIMEN_THIS_IMAGE
;
4877 resolve_substring (gfc_ref
*ref
, bool *equal_length
)
4879 int k
= gfc_validate_kind (BT_INTEGER
, gfc_charlen_int_kind
, false);
4881 if (ref
->u
.ss
.start
!= NULL
)
4883 if (!gfc_resolve_expr (ref
->u
.ss
.start
))
4886 if (ref
->u
.ss
.start
->ts
.type
!= BT_INTEGER
)
4888 gfc_error ("Substring start index at %L must be of type INTEGER",
4889 &ref
->u
.ss
.start
->where
);
4893 if (ref
->u
.ss
.start
->rank
!= 0)
4895 gfc_error ("Substring start index at %L must be scalar",
4896 &ref
->u
.ss
.start
->where
);
4900 if (compare_bound_int (ref
->u
.ss
.start
, 1) == CMP_LT
4901 && (compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_EQ
4902 || compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_GT
))
4904 gfc_error ("Substring start index at %L is less than one",
4905 &ref
->u
.ss
.start
->where
);
4910 if (ref
->u
.ss
.end
!= NULL
)
4912 if (!gfc_resolve_expr (ref
->u
.ss
.end
))
4915 if (ref
->u
.ss
.end
->ts
.type
!= BT_INTEGER
)
4917 gfc_error ("Substring end index at %L must be of type INTEGER",
4918 &ref
->u
.ss
.end
->where
);
4922 if (ref
->u
.ss
.end
->rank
!= 0)
4924 gfc_error ("Substring end index at %L must be scalar",
4925 &ref
->u
.ss
.end
->where
);
4929 if (ref
->u
.ss
.length
!= NULL
4930 && compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.length
->length
) == CMP_GT
4931 && (compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_EQ
4932 || compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_GT
))
4934 gfc_error ("Substring end index at %L exceeds the string length",
4935 &ref
->u
.ss
.start
->where
);
4939 if (compare_bound_mpz_t (ref
->u
.ss
.end
,
4940 gfc_integer_kinds
[k
].huge
) == CMP_GT
4941 && (compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_EQ
4942 || compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_GT
))
4944 gfc_error ("Substring end index at %L is too large",
4945 &ref
->u
.ss
.end
->where
);
4948 /* If the substring has the same length as the original
4949 variable, the reference itself can be deleted. */
4951 if (ref
->u
.ss
.length
!= NULL
4952 && compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.length
->length
) == CMP_EQ
4953 && compare_bound_int (ref
->u
.ss
.start
, 1) == CMP_EQ
)
4954 *equal_length
= true;
4961 /* This function supplies missing substring charlens. */
4964 gfc_resolve_substring_charlen (gfc_expr
*e
)
4967 gfc_expr
*start
, *end
;
4968 gfc_typespec
*ts
= NULL
;
4971 for (char_ref
= e
->ref
; char_ref
; char_ref
= char_ref
->next
)
4973 if (char_ref
->type
== REF_SUBSTRING
|| char_ref
->type
== REF_INQUIRY
)
4975 if (char_ref
->type
== REF_COMPONENT
)
4976 ts
= &char_ref
->u
.c
.component
->ts
;
4979 if (!char_ref
|| char_ref
->type
== REF_INQUIRY
)
4982 gcc_assert (char_ref
->next
== NULL
);
4986 if (e
->ts
.u
.cl
->length
)
4987 gfc_free_expr (e
->ts
.u
.cl
->length
);
4988 else if (e
->expr_type
== EXPR_VARIABLE
&& e
->symtree
->n
.sym
->attr
.dummy
)
4992 e
->ts
.type
= BT_CHARACTER
;
4993 e
->ts
.kind
= gfc_default_character_kind
;
4996 e
->ts
.u
.cl
= gfc_new_charlen (gfc_current_ns
, NULL
);
4998 if (char_ref
->u
.ss
.start
)
4999 start
= gfc_copy_expr (char_ref
->u
.ss
.start
);
5001 start
= gfc_get_int_expr (gfc_charlen_int_kind
, NULL
, 1);
5003 if (char_ref
->u
.ss
.end
)
5004 end
= gfc_copy_expr (char_ref
->u
.ss
.end
);
5005 else if (e
->expr_type
== EXPR_VARIABLE
)
5008 ts
= &e
->symtree
->n
.sym
->ts
;
5009 end
= gfc_copy_expr (ts
->u
.cl
->length
);
5016 gfc_free_expr (start
);
5017 gfc_free_expr (end
);
5021 /* Length = (end - start + 1).
5022 Check first whether it has a constant length. */
5023 if (gfc_dep_difference (end
, start
, &diff
))
5025 gfc_expr
*len
= gfc_get_constant_expr (BT_INTEGER
, gfc_charlen_int_kind
,
5028 mpz_add_ui (len
->value
.integer
, diff
, 1);
5030 e
->ts
.u
.cl
->length
= len
;
5031 /* The check for length < 0 is handled below */
5035 e
->ts
.u
.cl
->length
= gfc_subtract (end
, start
);
5036 e
->ts
.u
.cl
->length
= gfc_add (e
->ts
.u
.cl
->length
,
5037 gfc_get_int_expr (gfc_charlen_int_kind
,
5041 /* F2008, 6.4.1: Both the starting point and the ending point shall
5042 be within the range 1, 2, ..., n unless the starting point exceeds
5043 the ending point, in which case the substring has length zero. */
5045 if (mpz_cmp_si (e
->ts
.u
.cl
->length
->value
.integer
, 0) < 0)
5046 mpz_set_si (e
->ts
.u
.cl
->length
->value
.integer
, 0);
5048 e
->ts
.u
.cl
->length
->ts
.type
= BT_INTEGER
;
5049 e
->ts
.u
.cl
->length
->ts
.kind
= gfc_charlen_int_kind
;
5051 /* Make sure that the length is simplified. */
5052 gfc_simplify_expr (e
->ts
.u
.cl
->length
, 1);
5053 gfc_resolve_expr (e
->ts
.u
.cl
->length
);
5057 /* Resolve subtype references. */
5060 resolve_ref (gfc_expr
*expr
)
5062 int current_part_dimension
, n_components
, seen_part_dimension
;
5063 gfc_ref
*ref
, **prev
;
5066 for (ref
= expr
->ref
; ref
; ref
= ref
->next
)
5067 if (ref
->type
== REF_ARRAY
&& ref
->u
.ar
.as
== NULL
)
5069 find_array_spec (expr
);
5073 for (prev
= &expr
->ref
; *prev
!= NULL
;
5074 prev
= *prev
== NULL
? prev
: &(*prev
)->next
)
5075 switch ((*prev
)->type
)
5078 if (!resolve_array_ref (&(*prev
)->u
.ar
))
5087 equal_length
= false;
5088 if (!resolve_substring (*prev
, &equal_length
))
5091 if (expr
->expr_type
!= EXPR_SUBSTRING
&& equal_length
)
5093 /* Remove the reference and move the charlen, if any. */
5097 expr
->ts
.u
.cl
= ref
->u
.ss
.length
;
5098 ref
->u
.ss
.length
= NULL
;
5099 gfc_free_ref_list (ref
);
5104 /* Check constraints on part references. */
5106 current_part_dimension
= 0;
5107 seen_part_dimension
= 0;
5110 for (ref
= expr
->ref
; ref
; ref
= ref
->next
)
5115 switch (ref
->u
.ar
.type
)
5118 /* Coarray scalar. */
5119 if (ref
->u
.ar
.as
->rank
== 0)
5121 current_part_dimension
= 0;
5126 current_part_dimension
= 1;
5130 current_part_dimension
= 0;
5134 gfc_internal_error ("resolve_ref(): Bad array reference");
5140 if (current_part_dimension
|| seen_part_dimension
)
5143 if (ref
->u
.c
.component
->attr
.pointer
5144 || ref
->u
.c
.component
->attr
.proc_pointer
5145 || (ref
->u
.c
.component
->ts
.type
== BT_CLASS
5146 && CLASS_DATA (ref
->u
.c
.component
)->attr
.pointer
))
5148 gfc_error ("Component to the right of a part reference "
5149 "with nonzero rank must not have the POINTER "
5150 "attribute at %L", &expr
->where
);
5153 else if (ref
->u
.c
.component
->attr
.allocatable
5154 || (ref
->u
.c
.component
->ts
.type
== BT_CLASS
5155 && CLASS_DATA (ref
->u
.c
.component
)->attr
.allocatable
))
5158 gfc_error ("Component to the right of a part reference "
5159 "with nonzero rank must not have the ALLOCATABLE "
5160 "attribute at %L", &expr
->where
);
5173 if (((ref
->type
== REF_COMPONENT
&& n_components
> 1)
5174 || ref
->next
== NULL
)
5175 && current_part_dimension
5176 && seen_part_dimension
)
5178 gfc_error ("Two or more part references with nonzero rank must "
5179 "not be specified at %L", &expr
->where
);
5183 if (ref
->type
== REF_COMPONENT
)
5185 if (current_part_dimension
)
5186 seen_part_dimension
= 1;
5188 /* reset to make sure */
5189 current_part_dimension
= 0;
5197 /* Given an expression, determine its shape. This is easier than it sounds.
5198 Leaves the shape array NULL if it is not possible to determine the shape. */
5201 expression_shape (gfc_expr
*e
)
5203 mpz_t array
[GFC_MAX_DIMENSIONS
];
5206 if (e
->rank
<= 0 || e
->shape
!= NULL
)
5209 for (i
= 0; i
< e
->rank
; i
++)
5210 if (!gfc_array_dimen_size (e
, i
, &array
[i
]))
5213 e
->shape
= gfc_get_shape (e
->rank
);
5215 memcpy (e
->shape
, array
, e
->rank
* sizeof (mpz_t
));
5220 for (i
--; i
>= 0; i
--)
5221 mpz_clear (array
[i
]);
5225 /* Given a variable expression node, compute the rank of the expression by
5226 examining the base symbol and any reference structures it may have. */
5229 expression_rank (gfc_expr
*e
)
5234 /* Just to make sure, because EXPR_COMPCALL's also have an e->ref and that
5235 could lead to serious confusion... */
5236 gcc_assert (e
->expr_type
!= EXPR_COMPCALL
);
5240 if (e
->expr_type
== EXPR_ARRAY
)
5242 /* Constructors can have a rank different from one via RESHAPE(). */
5244 if (e
->symtree
== NULL
)
5250 e
->rank
= (e
->symtree
->n
.sym
->as
== NULL
)
5251 ? 0 : e
->symtree
->n
.sym
->as
->rank
;
5257 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
5259 if (ref
->type
== REF_COMPONENT
&& ref
->u
.c
.component
->attr
.proc_pointer
5260 && ref
->u
.c
.component
->attr
.function
&& !ref
->next
)
5261 rank
= ref
->u
.c
.component
->as
? ref
->u
.c
.component
->as
->rank
: 0;
5263 if (ref
->type
!= REF_ARRAY
)
5266 if (ref
->u
.ar
.type
== AR_FULL
)
5268 rank
= ref
->u
.ar
.as
->rank
;
5272 if (ref
->u
.ar
.type
== AR_SECTION
)
5274 /* Figure out the rank of the section. */
5276 gfc_internal_error ("expression_rank(): Two array specs");
5278 for (i
= 0; i
< ref
->u
.ar
.dimen
; i
++)
5279 if (ref
->u
.ar
.dimen_type
[i
] == DIMEN_RANGE
5280 || ref
->u
.ar
.dimen_type
[i
] == DIMEN_VECTOR
)
5290 expression_shape (e
);
5295 add_caf_get_intrinsic (gfc_expr
*e
)
5297 gfc_expr
*wrapper
, *tmp_expr
;
5301 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
5302 if (ref
->type
== REF_ARRAY
&& ref
->u
.ar
.codimen
> 0)
5307 for (n
= ref
->u
.ar
.dimen
; n
< ref
->u
.ar
.dimen
+ ref
->u
.ar
.codimen
; n
++)
5308 if (ref
->u
.ar
.dimen_type
[n
] != DIMEN_ELEMENT
)
5311 tmp_expr
= XCNEW (gfc_expr
);
5313 wrapper
= gfc_build_intrinsic_call (gfc_current_ns
, GFC_ISYM_CAF_GET
,
5314 "caf_get", tmp_expr
->where
, 1, tmp_expr
);
5315 wrapper
->ts
= e
->ts
;
5316 wrapper
->rank
= e
->rank
;
5318 wrapper
->shape
= gfc_copy_shape (e
->shape
, e
->rank
);
5325 remove_caf_get_intrinsic (gfc_expr
*e
)
5327 gcc_assert (e
->expr_type
== EXPR_FUNCTION
&& e
->value
.function
.isym
5328 && e
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
);
5329 gfc_expr
*e2
= e
->value
.function
.actual
->expr
;
5330 e
->value
.function
.actual
->expr
= NULL
;
5331 gfc_free_actual_arglist (e
->value
.function
.actual
);
5332 gfc_free_shape (&e
->shape
, e
->rank
);
5338 /* Resolve a variable expression. */
5341 resolve_variable (gfc_expr
*e
)
5348 if (e
->symtree
== NULL
)
5350 sym
= e
->symtree
->n
.sym
;
5352 /* Use same check as for TYPE(*) below; this check has to be before TYPE(*)
5353 as ts.type is set to BT_ASSUMED in resolve_symbol. */
5354 if (sym
->attr
.ext_attr
& (1 << EXT_ATTR_NO_ARG_CHECK
))
5356 if (!actual_arg
|| inquiry_argument
)
5358 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute may only "
5359 "be used as actual argument", sym
->name
, &e
->where
);
5363 /* TS 29113, 407b. */
5364 else if (e
->ts
.type
== BT_ASSUMED
)
5368 gfc_error ("Assumed-type variable %s at %L may only be used "
5369 "as actual argument", sym
->name
, &e
->where
);
5372 else if (inquiry_argument
&& !first_actual_arg
)
5374 /* FIXME: It doesn't work reliably as inquiry_argument is not set
5375 for all inquiry functions in resolve_function; the reason is
5376 that the function-name resolution happens too late in that
5378 gfc_error ("Assumed-type variable %s at %L as actual argument to "
5379 "an inquiry function shall be the first argument",
5380 sym
->name
, &e
->where
);
5384 /* TS 29113, C535b. */
5385 else if ((sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
5386 && CLASS_DATA (sym
)->as
5387 && CLASS_DATA (sym
)->as
->type
== AS_ASSUMED_RANK
)
5388 || (sym
->ts
.type
!= BT_CLASS
&& sym
->as
5389 && sym
->as
->type
== AS_ASSUMED_RANK
))
5393 gfc_error ("Assumed-rank variable %s at %L may only be used as "
5394 "actual argument", sym
->name
, &e
->where
);
5397 else if (inquiry_argument
&& !first_actual_arg
)
5399 /* FIXME: It doesn't work reliably as inquiry_argument is not set
5400 for all inquiry functions in resolve_function; the reason is
5401 that the function-name resolution happens too late in that
5403 gfc_error ("Assumed-rank variable %s at %L as actual argument "
5404 "to an inquiry function shall be the first argument",
5405 sym
->name
, &e
->where
);
5410 if ((sym
->attr
.ext_attr
& (1 << EXT_ATTR_NO_ARG_CHECK
)) && e
->ref
5411 && !(e
->ref
->type
== REF_ARRAY
&& e
->ref
->u
.ar
.type
== AR_FULL
5412 && e
->ref
->next
== NULL
))
5414 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute shall not have "
5415 "a subobject reference", sym
->name
, &e
->ref
->u
.ar
.where
);
5418 /* TS 29113, 407b. */
5419 else if (e
->ts
.type
== BT_ASSUMED
&& e
->ref
5420 && !(e
->ref
->type
== REF_ARRAY
&& e
->ref
->u
.ar
.type
== AR_FULL
5421 && e
->ref
->next
== NULL
))
5423 gfc_error ("Assumed-type variable %s at %L shall not have a subobject "
5424 "reference", sym
->name
, &e
->ref
->u
.ar
.where
);
5428 /* TS 29113, C535b. */
5429 if (((sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
5430 && CLASS_DATA (sym
)->as
5431 && CLASS_DATA (sym
)->as
->type
== AS_ASSUMED_RANK
)
5432 || (sym
->ts
.type
!= BT_CLASS
&& sym
->as
5433 && sym
->as
->type
== AS_ASSUMED_RANK
))
5435 && !(e
->ref
->type
== REF_ARRAY
&& e
->ref
->u
.ar
.type
== AR_FULL
5436 && e
->ref
->next
== NULL
))
5438 gfc_error ("Assumed-rank variable %s at %L shall not have a subobject "
5439 "reference", sym
->name
, &e
->ref
->u
.ar
.where
);
5443 /* For variables that are used in an associate (target => object) where
5444 the object's basetype is array valued while the target is scalar,
5445 the ts' type of the component refs is still array valued, which
5446 can't be translated that way. */
5447 if (sym
->assoc
&& e
->rank
== 0 && e
->ref
&& sym
->ts
.type
== BT_CLASS
5448 && sym
->assoc
->target
&& sym
->assoc
->target
->ts
.type
== BT_CLASS
5449 && CLASS_DATA (sym
->assoc
->target
)->as
)
5451 gfc_ref
*ref
= e
->ref
;
5457 ref
->u
.c
.sym
= sym
->ts
.u
.derived
;
5458 /* Stop the loop. */
5468 /* If this is an associate-name, it may be parsed with an array reference
5469 in error even though the target is scalar. Fail directly in this case.
5470 TODO Understand why class scalar expressions must be excluded. */
5471 if (sym
->assoc
&& !(sym
->ts
.type
== BT_CLASS
&& e
->rank
== 0))
5473 if (sym
->ts
.type
== BT_CLASS
)
5474 gfc_fix_class_refs (e
);
5475 if (!sym
->attr
.dimension
&& e
->ref
&& e
->ref
->type
== REF_ARRAY
)
5477 else if (sym
->attr
.dimension
&& (!e
->ref
|| e
->ref
->type
!= REF_ARRAY
))
5479 /* This can happen because the parser did not detect that the
5480 associate name is an array and the expression had no array
5482 gfc_ref
*ref
= gfc_get_ref ();
5483 ref
->type
= REF_ARRAY
;
5484 ref
->u
.ar
= *gfc_get_array_ref();
5485 ref
->u
.ar
.type
= AR_FULL
;
5488 ref
->u
.ar
.as
= sym
->as
;
5489 ref
->u
.ar
.dimen
= sym
->as
->rank
;
5497 if (sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
->attr
.generic
)
5498 sym
->ts
.u
.derived
= gfc_find_dt_in_generic (sym
->ts
.u
.derived
);
5500 /* On the other hand, the parser may not have known this is an array;
5501 in this case, we have to add a FULL reference. */
5502 if (sym
->assoc
&& sym
->attr
.dimension
&& !e
->ref
)
5504 e
->ref
= gfc_get_ref ();
5505 e
->ref
->type
= REF_ARRAY
;
5506 e
->ref
->u
.ar
.type
= AR_FULL
;
5507 e
->ref
->u
.ar
.dimen
= 0;
5510 /* Like above, but for class types, where the checking whether an array
5511 ref is present is more complicated. Furthermore make sure not to add
5512 the full array ref to _vptr or _len refs. */
5513 if (sym
->assoc
&& sym
->ts
.type
== BT_CLASS
5514 && CLASS_DATA (sym
)->attr
.dimension
5515 && (e
->ts
.type
!= BT_DERIVED
|| !e
->ts
.u
.derived
->attr
.vtype
))
5517 gfc_ref
*ref
, *newref
;
5519 newref
= gfc_get_ref ();
5520 newref
->type
= REF_ARRAY
;
5521 newref
->u
.ar
.type
= AR_FULL
;
5522 newref
->u
.ar
.dimen
= 0;
5523 /* Because this is an associate var and the first ref either is a ref to
5524 the _data component or not, no traversal of the ref chain is
5525 needed. The array ref needs to be inserted after the _data ref,
5526 or when that is not present, which may happend for polymorphic
5527 types, then at the first position. */
5531 else if (ref
->type
== REF_COMPONENT
5532 && strcmp ("_data", ref
->u
.c
.component
->name
) == 0)
5534 if (!ref
->next
|| ref
->next
->type
!= REF_ARRAY
)
5536 newref
->next
= ref
->next
;
5540 /* Array ref present already. */
5541 gfc_free_ref_list (newref
);
5543 else if (ref
->type
== REF_ARRAY
)
5544 /* Array ref present already. */
5545 gfc_free_ref_list (newref
);
5553 if (e
->ref
&& !resolve_ref (e
))
5556 if (sym
->attr
.flavor
== FL_PROCEDURE
5557 && (!sym
->attr
.function
5558 || (sym
->attr
.function
&& sym
->result
5559 && sym
->result
->attr
.proc_pointer
5560 && !sym
->result
->attr
.function
)))
5562 e
->ts
.type
= BT_PROCEDURE
;
5563 goto resolve_procedure
;
5566 if (sym
->ts
.type
!= BT_UNKNOWN
)
5567 gfc_variable_attr (e
, &e
->ts
);
5568 else if (sym
->attr
.flavor
== FL_PROCEDURE
5569 && sym
->attr
.function
&& sym
->result
5570 && sym
->result
->ts
.type
!= BT_UNKNOWN
5571 && sym
->result
->attr
.proc_pointer
)
5572 e
->ts
= sym
->result
->ts
;
5575 /* Must be a simple variable reference. */
5576 if (!gfc_set_default_type (sym
, 1, sym
->ns
))
5581 if (check_assumed_size_reference (sym
, e
))
5584 /* Deal with forward references to entries during gfc_resolve_code, to
5585 satisfy, at least partially, 12.5.2.5. */
5586 if (gfc_current_ns
->entries
5587 && current_entry_id
== sym
->entry_id
5590 && cs_base
->current
->op
!= EXEC_ENTRY
)
5592 gfc_entry_list
*entry
;
5593 gfc_formal_arglist
*formal
;
5595 bool seen
, saved_specification_expr
;
5597 /* If the symbol is a dummy... */
5598 if (sym
->attr
.dummy
&& sym
->ns
== gfc_current_ns
)
5600 entry
= gfc_current_ns
->entries
;
5603 /* ...test if the symbol is a parameter of previous entries. */
5604 for (; entry
&& entry
->id
<= current_entry_id
; entry
= entry
->next
)
5605 for (formal
= entry
->sym
->formal
; formal
; formal
= formal
->next
)
5607 if (formal
->sym
&& sym
->name
== formal
->sym
->name
)
5614 /* If it has not been seen as a dummy, this is an error. */
5617 if (specification_expr
)
5618 gfc_error ("Variable %qs, used in a specification expression"
5619 ", is referenced at %L before the ENTRY statement "
5620 "in which it is a parameter",
5621 sym
->name
, &cs_base
->current
->loc
);
5623 gfc_error ("Variable %qs is used at %L before the ENTRY "
5624 "statement in which it is a parameter",
5625 sym
->name
, &cs_base
->current
->loc
);
5630 /* Now do the same check on the specification expressions. */
5631 saved_specification_expr
= specification_expr
;
5632 specification_expr
= true;
5633 if (sym
->ts
.type
== BT_CHARACTER
5634 && !gfc_resolve_expr (sym
->ts
.u
.cl
->length
))
5638 for (n
= 0; n
< sym
->as
->rank
; n
++)
5640 if (!gfc_resolve_expr (sym
->as
->lower
[n
]))
5642 if (!gfc_resolve_expr (sym
->as
->upper
[n
]))
5645 specification_expr
= saved_specification_expr
;
5648 /* Update the symbol's entry level. */
5649 sym
->entry_id
= current_entry_id
+ 1;
5652 /* If a symbol has been host_associated mark it. This is used latter,
5653 to identify if aliasing is possible via host association. */
5654 if (sym
->attr
.flavor
== FL_VARIABLE
5655 && gfc_current_ns
->parent
5656 && (gfc_current_ns
->parent
== sym
->ns
5657 || (gfc_current_ns
->parent
->parent
5658 && gfc_current_ns
->parent
->parent
== sym
->ns
)))
5659 sym
->attr
.host_assoc
= 1;
5661 if (gfc_current_ns
->proc_name
5662 && sym
->attr
.dimension
5663 && (sym
->ns
!= gfc_current_ns
5664 || sym
->attr
.use_assoc
5665 || sym
->attr
.in_common
))
5666 gfc_current_ns
->proc_name
->attr
.array_outer_dependency
= 1;
5669 if (t
&& !resolve_procedure_expression (e
))
5672 /* F2008, C617 and C1229. */
5673 if (!inquiry_argument
&& (e
->ts
.type
== BT_CLASS
|| e
->ts
.type
== BT_DERIVED
)
5674 && gfc_is_coindexed (e
))
5676 gfc_ref
*ref
, *ref2
= NULL
;
5678 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
5680 if (ref
->type
== REF_COMPONENT
)
5682 if (ref
->type
== REF_ARRAY
&& ref
->u
.ar
.codimen
> 0)
5686 for ( ; ref
; ref
= ref
->next
)
5687 if (ref
->type
== REF_COMPONENT
)
5690 /* Expression itself is not coindexed object. */
5691 if (ref
&& e
->ts
.type
== BT_CLASS
)
5693 gfc_error ("Polymorphic subobject of coindexed object at %L",
5698 /* Expression itself is coindexed object. */
5702 c
= ref2
? ref2
->u
.c
.component
: e
->symtree
->n
.sym
->components
;
5703 for ( ; c
; c
= c
->next
)
5704 if (c
->attr
.allocatable
&& c
->ts
.type
== BT_CLASS
)
5706 gfc_error ("Coindexed object with polymorphic allocatable "
5707 "subcomponent at %L", &e
->where
);
5715 expression_rank (e
);
5717 if (t
&& flag_coarray
== GFC_FCOARRAY_LIB
&& gfc_is_coindexed (e
))
5718 add_caf_get_intrinsic (e
);
5720 /* Simplify cases where access to a parameter array results in a
5721 single constant. Suppress errors since those will have been
5722 issued before, as warnings. */
5723 if (e
->rank
== 0 && sym
->as
&& sym
->attr
.flavor
== FL_PARAMETER
)
5725 gfc_push_suppress_errors ();
5726 gfc_simplify_expr (e
, 1);
5727 gfc_pop_suppress_errors ();
5734 /* Checks to see that the correct symbol has been host associated.
5735 The only situation where this arises is that in which a twice
5736 contained function is parsed after the host association is made.
5737 Therefore, on detecting this, change the symbol in the expression
5738 and convert the array reference into an actual arglist if the old
5739 symbol is a variable. */
5741 check_host_association (gfc_expr
*e
)
5743 gfc_symbol
*sym
, *old_sym
;
5747 gfc_actual_arglist
*arg
, *tail
= NULL
;
5748 bool retval
= e
->expr_type
== EXPR_FUNCTION
;
5750 /* If the expression is the result of substitution in
5751 interface.c(gfc_extend_expr) because there is no way in
5752 which the host association can be wrong. */
5753 if (e
->symtree
== NULL
5754 || e
->symtree
->n
.sym
== NULL
5755 || e
->user_operator
)
5758 old_sym
= e
->symtree
->n
.sym
;
5760 if (gfc_current_ns
->parent
5761 && old_sym
->ns
!= gfc_current_ns
)
5763 /* Use the 'USE' name so that renamed module symbols are
5764 correctly handled. */
5765 gfc_find_symbol (e
->symtree
->name
, gfc_current_ns
, 1, &sym
);
5767 if (sym
&& old_sym
!= sym
5768 && sym
->ts
.type
== old_sym
->ts
.type
5769 && sym
->attr
.flavor
== FL_PROCEDURE
5770 && sym
->attr
.contained
)
5772 /* Clear the shape, since it might not be valid. */
5773 gfc_free_shape (&e
->shape
, e
->rank
);
5775 /* Give the expression the right symtree! */
5776 gfc_find_sym_tree (e
->symtree
->name
, NULL
, 1, &st
);
5777 gcc_assert (st
!= NULL
);
5779 if (old_sym
->attr
.flavor
== FL_PROCEDURE
5780 || e
->expr_type
== EXPR_FUNCTION
)
5782 /* Original was function so point to the new symbol, since
5783 the actual argument list is already attached to the
5785 e
->value
.function
.esym
= NULL
;
5790 /* Original was variable so convert array references into
5791 an actual arglist. This does not need any checking now
5792 since resolve_function will take care of it. */
5793 e
->value
.function
.actual
= NULL
;
5794 e
->expr_type
= EXPR_FUNCTION
;
5797 /* Ambiguity will not arise if the array reference is not
5798 the last reference. */
5799 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
5800 if (ref
->type
== REF_ARRAY
&& ref
->next
== NULL
)
5803 gcc_assert (ref
->type
== REF_ARRAY
);
5805 /* Grab the start expressions from the array ref and
5806 copy them into actual arguments. */
5807 for (n
= 0; n
< ref
->u
.ar
.dimen
; n
++)
5809 arg
= gfc_get_actual_arglist ();
5810 arg
->expr
= gfc_copy_expr (ref
->u
.ar
.start
[n
]);
5811 if (e
->value
.function
.actual
== NULL
)
5812 tail
= e
->value
.function
.actual
= arg
;
5820 /* Dump the reference list and set the rank. */
5821 gfc_free_ref_list (e
->ref
);
5823 e
->rank
= sym
->as
? sym
->as
->rank
: 0;
5826 gfc_resolve_expr (e
);
5830 /* This might have changed! */
5831 return e
->expr_type
== EXPR_FUNCTION
;
5836 gfc_resolve_character_operator (gfc_expr
*e
)
5838 gfc_expr
*op1
= e
->value
.op
.op1
;
5839 gfc_expr
*op2
= e
->value
.op
.op2
;
5840 gfc_expr
*e1
= NULL
;
5841 gfc_expr
*e2
= NULL
;
5843 gcc_assert (e
->value
.op
.op
== INTRINSIC_CONCAT
);
5845 if (op1
->ts
.u
.cl
&& op1
->ts
.u
.cl
->length
)
5846 e1
= gfc_copy_expr (op1
->ts
.u
.cl
->length
);
5847 else if (op1
->expr_type
== EXPR_CONSTANT
)
5848 e1
= gfc_get_int_expr (gfc_charlen_int_kind
, NULL
,
5849 op1
->value
.character
.length
);
5851 if (op2
->ts
.u
.cl
&& op2
->ts
.u
.cl
->length
)
5852 e2
= gfc_copy_expr (op2
->ts
.u
.cl
->length
);
5853 else if (op2
->expr_type
== EXPR_CONSTANT
)
5854 e2
= gfc_get_int_expr (gfc_charlen_int_kind
, NULL
,
5855 op2
->value
.character
.length
);
5857 e
->ts
.u
.cl
= gfc_new_charlen (gfc_current_ns
, NULL
);
5867 e
->ts
.u
.cl
->length
= gfc_add (e1
, e2
);
5868 e
->ts
.u
.cl
->length
->ts
.type
= BT_INTEGER
;
5869 e
->ts
.u
.cl
->length
->ts
.kind
= gfc_charlen_int_kind
;
5870 gfc_simplify_expr (e
->ts
.u
.cl
->length
, 0);
5871 gfc_resolve_expr (e
->ts
.u
.cl
->length
);
5877 /* Ensure that an character expression has a charlen and, if possible, a
5878 length expression. */
5881 fixup_charlen (gfc_expr
*e
)
5883 /* The cases fall through so that changes in expression type and the need
5884 for multiple fixes are picked up. In all circumstances, a charlen should
5885 be available for the middle end to hang a backend_decl on. */
5886 switch (e
->expr_type
)
5889 gfc_resolve_character_operator (e
);
5893 if (e
->expr_type
== EXPR_ARRAY
)
5894 gfc_resolve_character_array_constructor (e
);
5897 case EXPR_SUBSTRING
:
5898 if (!e
->ts
.u
.cl
&& e
->ref
)
5899 gfc_resolve_substring_charlen (e
);
5904 e
->ts
.u
.cl
= gfc_new_charlen (gfc_current_ns
, NULL
);
5911 /* Update an actual argument to include the passed-object for type-bound
5912 procedures at the right position. */
5914 static gfc_actual_arglist
*
5915 update_arglist_pass (gfc_actual_arglist
* lst
, gfc_expr
* po
, unsigned argpos
,
5918 gcc_assert (argpos
> 0);
5922 gfc_actual_arglist
* result
;
5924 result
= gfc_get_actual_arglist ();
5928 result
->name
= name
;
5934 lst
->next
= update_arglist_pass (lst
->next
, po
, argpos
- 1, name
);
5936 lst
= update_arglist_pass (NULL
, po
, argpos
- 1, name
);
5941 /* Extract the passed-object from an EXPR_COMPCALL (a copy of it). */
5944 extract_compcall_passed_object (gfc_expr
* e
)
5948 if (e
->expr_type
== EXPR_UNKNOWN
)
5950 gfc_error ("Error in typebound call at %L",
5955 gcc_assert (e
->expr_type
== EXPR_COMPCALL
);
5957 if (e
->value
.compcall
.base_object
)
5958 po
= gfc_copy_expr (e
->value
.compcall
.base_object
);
5961 po
= gfc_get_expr ();
5962 po
->expr_type
= EXPR_VARIABLE
;
5963 po
->symtree
= e
->symtree
;
5964 po
->ref
= gfc_copy_ref (e
->ref
);
5965 po
->where
= e
->where
;
5968 if (!gfc_resolve_expr (po
))
5975 /* Update the arglist of an EXPR_COMPCALL expression to include the
5979 update_compcall_arglist (gfc_expr
* e
)
5982 gfc_typebound_proc
* tbp
;
5984 tbp
= e
->value
.compcall
.tbp
;
5989 po
= extract_compcall_passed_object (e
);
5993 if (tbp
->nopass
|| e
->value
.compcall
.ignore_pass
)
5999 if (tbp
->pass_arg_num
<= 0)
6002 e
->value
.compcall
.actual
= update_arglist_pass (e
->value
.compcall
.actual
, po
,
6010 /* Extract the passed object from a PPC call (a copy of it). */
6013 extract_ppc_passed_object (gfc_expr
*e
)
6018 po
= gfc_get_expr ();
6019 po
->expr_type
= EXPR_VARIABLE
;
6020 po
->symtree
= e
->symtree
;
6021 po
->ref
= gfc_copy_ref (e
->ref
);
6022 po
->where
= e
->where
;
6024 /* Remove PPC reference. */
6026 while ((*ref
)->next
)
6027 ref
= &(*ref
)->next
;
6028 gfc_free_ref_list (*ref
);
6031 if (!gfc_resolve_expr (po
))
6038 /* Update the actual arglist of a procedure pointer component to include the
6042 update_ppc_arglist (gfc_expr
* e
)
6046 gfc_typebound_proc
* tb
;
6048 ppc
= gfc_get_proc_ptr_comp (e
);
6056 else if (tb
->nopass
)
6059 po
= extract_ppc_passed_object (e
);
6066 gfc_error ("Passed-object at %L must be scalar", &e
->where
);
6071 if (po
->ts
.type
== BT_DERIVED
&& po
->ts
.u
.derived
->attr
.abstract
)
6073 gfc_error ("Base object for procedure-pointer component call at %L is of"
6074 " ABSTRACT type %qs", &e
->where
, po
->ts
.u
.derived
->name
);
6078 gcc_assert (tb
->pass_arg_num
> 0);
6079 e
->value
.compcall
.actual
= update_arglist_pass (e
->value
.compcall
.actual
, po
,
6087 /* Check that the object a TBP is called on is valid, i.e. it must not be
6088 of ABSTRACT type (as in subobject%abstract_parent%tbp()). */
6091 check_typebound_baseobject (gfc_expr
* e
)
6094 bool return_value
= false;
6096 base
= extract_compcall_passed_object (e
);
6100 if (base
->ts
.type
!= BT_DERIVED
&& base
->ts
.type
!= BT_CLASS
)
6102 gfc_error ("Error in typebound call at %L", &e
->where
);
6106 if (base
->ts
.type
== BT_CLASS
&& !gfc_expr_attr (base
).class_ok
)
6110 if (base
->ts
.type
== BT_DERIVED
&& base
->ts
.u
.derived
->attr
.abstract
)
6112 gfc_error ("Base object for type-bound procedure call at %L is of"
6113 " ABSTRACT type %qs", &e
->where
, base
->ts
.u
.derived
->name
);
6117 /* F08:C1230. If the procedure called is NOPASS,
6118 the base object must be scalar. */
6119 if (e
->value
.compcall
.tbp
->nopass
&& base
->rank
!= 0)
6121 gfc_error ("Base object for NOPASS type-bound procedure call at %L must"
6122 " be scalar", &e
->where
);
6126 return_value
= true;
6129 gfc_free_expr (base
);
6130 return return_value
;
6134 /* Resolve a call to a type-bound procedure, either function or subroutine,
6135 statically from the data in an EXPR_COMPCALL expression. The adapted
6136 arglist and the target-procedure symtree are returned. */
6139 resolve_typebound_static (gfc_expr
* e
, gfc_symtree
** target
,
6140 gfc_actual_arglist
** actual
)
6142 gcc_assert (e
->expr_type
== EXPR_COMPCALL
);
6143 gcc_assert (!e
->value
.compcall
.tbp
->is_generic
);
6145 /* Update the actual arglist for PASS. */
6146 if (!update_compcall_arglist (e
))
6149 *actual
= e
->value
.compcall
.actual
;
6150 *target
= e
->value
.compcall
.tbp
->u
.specific
;
6152 gfc_free_ref_list (e
->ref
);
6154 e
->value
.compcall
.actual
= NULL
;
6156 /* If we find a deferred typebound procedure, check for derived types
6157 that an overriding typebound procedure has not been missed. */
6158 if (e
->value
.compcall
.name
6159 && !e
->value
.compcall
.tbp
->non_overridable
6160 && e
->value
.compcall
.base_object
6161 && e
->value
.compcall
.base_object
->ts
.type
== BT_DERIVED
)
6164 gfc_symbol
*derived
;
6166 /* Use the derived type of the base_object. */
6167 derived
= e
->value
.compcall
.base_object
->ts
.u
.derived
;
6170 /* If necessary, go through the inheritance chain. */
6171 while (!st
&& derived
)
6173 /* Look for the typebound procedure 'name'. */
6174 if (derived
->f2k_derived
&& derived
->f2k_derived
->tb_sym_root
)
6175 st
= gfc_find_symtree (derived
->f2k_derived
->tb_sym_root
,
6176 e
->value
.compcall
.name
);
6178 derived
= gfc_get_derived_super_type (derived
);
6181 /* Now find the specific name in the derived type namespace. */
6182 if (st
&& st
->n
.tb
&& st
->n
.tb
->u
.specific
)
6183 gfc_find_sym_tree (st
->n
.tb
->u
.specific
->name
,
6184 derived
->ns
, 1, &st
);
6192 /* Get the ultimate declared type from an expression. In addition,
6193 return the last class/derived type reference and the copy of the
6194 reference list. If check_types is set true, derived types are
6195 identified as well as class references. */
6197 get_declared_from_expr (gfc_ref
**class_ref
, gfc_ref
**new_ref
,
6198 gfc_expr
*e
, bool check_types
)
6200 gfc_symbol
*declared
;
6207 *new_ref
= gfc_copy_ref (e
->ref
);
6209 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
6211 if (ref
->type
!= REF_COMPONENT
)
6214 if ((ref
->u
.c
.component
->ts
.type
== BT_CLASS
6215 || (check_types
&& gfc_bt_struct (ref
->u
.c
.component
->ts
.type
)))
6216 && ref
->u
.c
.component
->attr
.flavor
!= FL_PROCEDURE
)
6218 declared
= ref
->u
.c
.component
->ts
.u
.derived
;
6224 if (declared
== NULL
)
6225 declared
= e
->symtree
->n
.sym
->ts
.u
.derived
;
6231 /* Given an EXPR_COMPCALL calling a GENERIC typebound procedure, figure out
6232 which of the specific bindings (if any) matches the arglist and transform
6233 the expression into a call of that binding. */
6236 resolve_typebound_generic_call (gfc_expr
* e
, const char **name
)
6238 gfc_typebound_proc
* genproc
;
6239 const char* genname
;
6241 gfc_symbol
*derived
;
6243 gcc_assert (e
->expr_type
== EXPR_COMPCALL
);
6244 genname
= e
->value
.compcall
.name
;
6245 genproc
= e
->value
.compcall
.tbp
;
6247 if (!genproc
->is_generic
)
6250 /* Try the bindings on this type and in the inheritance hierarchy. */
6251 for (; genproc
; genproc
= genproc
->overridden
)
6255 gcc_assert (genproc
->is_generic
);
6256 for (g
= genproc
->u
.generic
; g
; g
= g
->next
)
6259 gfc_actual_arglist
* args
;
6262 gcc_assert (g
->specific
);
6264 if (g
->specific
->error
)
6267 target
= g
->specific
->u
.specific
->n
.sym
;
6269 /* Get the right arglist by handling PASS/NOPASS. */
6270 args
= gfc_copy_actual_arglist (e
->value
.compcall
.actual
);
6271 if (!g
->specific
->nopass
)
6274 po
= extract_compcall_passed_object (e
);
6277 gfc_free_actual_arglist (args
);
6281 gcc_assert (g
->specific
->pass_arg_num
> 0);
6282 gcc_assert (!g
->specific
->error
);
6283 args
= update_arglist_pass (args
, po
, g
->specific
->pass_arg_num
,
6284 g
->specific
->pass_arg
);
6286 resolve_actual_arglist (args
, target
->attr
.proc
,
6287 is_external_proc (target
)
6288 && gfc_sym_get_dummy_args (target
) == NULL
);
6290 /* Check if this arglist matches the formal. */
6291 matches
= gfc_arglist_matches_symbol (&args
, target
);
6293 /* Clean up and break out of the loop if we've found it. */
6294 gfc_free_actual_arglist (args
);
6297 e
->value
.compcall
.tbp
= g
->specific
;
6298 genname
= g
->specific_st
->name
;
6299 /* Pass along the name for CLASS methods, where the vtab
6300 procedure pointer component has to be referenced. */
6308 /* Nothing matching found! */
6309 gfc_error ("Found no matching specific binding for the call to the GENERIC"
6310 " %qs at %L", genname
, &e
->where
);
6314 /* Make sure that we have the right specific instance for the name. */
6315 derived
= get_declared_from_expr (NULL
, NULL
, e
, true);
6317 st
= gfc_find_typebound_proc (derived
, NULL
, genname
, true, &e
->where
);
6319 e
->value
.compcall
.tbp
= st
->n
.tb
;
6325 /* Resolve a call to a type-bound subroutine. */
6328 resolve_typebound_call (gfc_code
* c
, const char **name
, bool *overridable
)
6330 gfc_actual_arglist
* newactual
;
6331 gfc_symtree
* target
;
6333 /* Check that's really a SUBROUTINE. */
6334 if (!c
->expr1
->value
.compcall
.tbp
->subroutine
)
6336 if (!c
->expr1
->value
.compcall
.tbp
->is_generic
6337 && c
->expr1
->value
.compcall
.tbp
->u
.specific
6338 && c
->expr1
->value
.compcall
.tbp
->u
.specific
->n
.sym
6339 && c
->expr1
->value
.compcall
.tbp
->u
.specific
->n
.sym
->attr
.subroutine
)
6340 c
->expr1
->value
.compcall
.tbp
->subroutine
= 1;
6343 gfc_error ("%qs at %L should be a SUBROUTINE",
6344 c
->expr1
->value
.compcall
.name
, &c
->loc
);
6349 if (!check_typebound_baseobject (c
->expr1
))
6352 /* Pass along the name for CLASS methods, where the vtab
6353 procedure pointer component has to be referenced. */
6355 *name
= c
->expr1
->value
.compcall
.name
;
6357 if (!resolve_typebound_generic_call (c
->expr1
, name
))
6360 /* Pass along the NON_OVERRIDABLE attribute of the specific TBP. */
6362 *overridable
= !c
->expr1
->value
.compcall
.tbp
->non_overridable
;
6364 /* Transform into an ordinary EXEC_CALL for now. */
6366 if (!resolve_typebound_static (c
->expr1
, &target
, &newactual
))
6369 c
->ext
.actual
= newactual
;
6370 c
->symtree
= target
;
6371 c
->op
= (c
->expr1
->value
.compcall
.assign
? EXEC_ASSIGN_CALL
: EXEC_CALL
);
6373 gcc_assert (!c
->expr1
->ref
&& !c
->expr1
->value
.compcall
.actual
);
6375 gfc_free_expr (c
->expr1
);
6376 c
->expr1
= gfc_get_expr ();
6377 c
->expr1
->expr_type
= EXPR_FUNCTION
;
6378 c
->expr1
->symtree
= target
;
6379 c
->expr1
->where
= c
->loc
;
6381 return resolve_call (c
);
6385 /* Resolve a component-call expression. */
6387 resolve_compcall (gfc_expr
* e
, const char **name
)
6389 gfc_actual_arglist
* newactual
;
6390 gfc_symtree
* target
;
6392 /* Check that's really a FUNCTION. */
6393 if (!e
->value
.compcall
.tbp
->function
)
6395 gfc_error ("%qs at %L should be a FUNCTION",
6396 e
->value
.compcall
.name
, &e
->where
);
6400 /* These must not be assign-calls! */
6401 gcc_assert (!e
->value
.compcall
.assign
);
6403 if (!check_typebound_baseobject (e
))
6406 /* Pass along the name for CLASS methods, where the vtab
6407 procedure pointer component has to be referenced. */
6409 *name
= e
->value
.compcall
.name
;
6411 if (!resolve_typebound_generic_call (e
, name
))
6413 gcc_assert (!e
->value
.compcall
.tbp
->is_generic
);
6415 /* Take the rank from the function's symbol. */
6416 if (e
->value
.compcall
.tbp
->u
.specific
->n
.sym
->as
)
6417 e
->rank
= e
->value
.compcall
.tbp
->u
.specific
->n
.sym
->as
->rank
;
6419 /* For now, we simply transform it into an EXPR_FUNCTION call with the same
6420 arglist to the TBP's binding target. */
6422 if (!resolve_typebound_static (e
, &target
, &newactual
))
6425 e
->value
.function
.actual
= newactual
;
6426 e
->value
.function
.name
= NULL
;
6427 e
->value
.function
.esym
= target
->n
.sym
;
6428 e
->value
.function
.isym
= NULL
;
6429 e
->symtree
= target
;
6430 e
->ts
= target
->n
.sym
->ts
;
6431 e
->expr_type
= EXPR_FUNCTION
;
6433 /* Resolution is not necessary if this is a class subroutine; this
6434 function only has to identify the specific proc. Resolution of
6435 the call will be done next in resolve_typebound_call. */
6436 return gfc_resolve_expr (e
);
6440 static bool resolve_fl_derived (gfc_symbol
*sym
);
6443 /* Resolve a typebound function, or 'method'. First separate all
6444 the non-CLASS references by calling resolve_compcall directly. */
6447 resolve_typebound_function (gfc_expr
* e
)
6449 gfc_symbol
*declared
;
6461 /* Deal with typebound operators for CLASS objects. */
6462 expr
= e
->value
.compcall
.base_object
;
6463 overridable
= !e
->value
.compcall
.tbp
->non_overridable
;
6464 if (expr
&& expr
->ts
.type
== BT_CLASS
&& e
->value
.compcall
.name
)
6466 /* If the base_object is not a variable, the corresponding actual
6467 argument expression must be stored in e->base_expression so
6468 that the corresponding tree temporary can be used as the base
6469 object in gfc_conv_procedure_call. */
6470 if (expr
->expr_type
!= EXPR_VARIABLE
)
6472 gfc_actual_arglist
*args
;
6474 for (args
= e
->value
.function
.actual
; args
; args
= args
->next
)
6476 if (expr
== args
->expr
)
6481 /* Since the typebound operators are generic, we have to ensure
6482 that any delays in resolution are corrected and that the vtab
6485 declared
= ts
.u
.derived
;
6486 c
= gfc_find_component (declared
, "_vptr", true, true, NULL
);
6487 if (c
->ts
.u
.derived
== NULL
)
6488 c
->ts
.u
.derived
= gfc_find_derived_vtab (declared
);
6490 if (!resolve_compcall (e
, &name
))
6493 /* Use the generic name if it is there. */
6494 name
= name
? name
: e
->value
.function
.esym
->name
;
6495 e
->symtree
= expr
->symtree
;
6496 e
->ref
= gfc_copy_ref (expr
->ref
);
6497 get_declared_from_expr (&class_ref
, NULL
, e
, false);
6499 /* Trim away the extraneous references that emerge from nested
6500 use of interface.c (extend_expr). */
6501 if (class_ref
&& class_ref
->next
)
6503 gfc_free_ref_list (class_ref
->next
);
6504 class_ref
->next
= NULL
;
6506 else if (e
->ref
&& !class_ref
&& expr
->ts
.type
!= BT_CLASS
)
6508 gfc_free_ref_list (e
->ref
);
6512 gfc_add_vptr_component (e
);
6513 gfc_add_component_ref (e
, name
);
6514 e
->value
.function
.esym
= NULL
;
6515 if (expr
->expr_type
!= EXPR_VARIABLE
)
6516 e
->base_expr
= expr
;
6521 return resolve_compcall (e
, NULL
);
6523 if (!resolve_ref (e
))
6526 /* Get the CLASS declared type. */
6527 declared
= get_declared_from_expr (&class_ref
, &new_ref
, e
, true);
6529 if (!resolve_fl_derived (declared
))
6532 /* Weed out cases of the ultimate component being a derived type. */
6533 if ((class_ref
&& gfc_bt_struct (class_ref
->u
.c
.component
->ts
.type
))
6534 || (!class_ref
&& st
->n
.sym
->ts
.type
!= BT_CLASS
))
6536 gfc_free_ref_list (new_ref
);
6537 return resolve_compcall (e
, NULL
);
6540 c
= gfc_find_component (declared
, "_data", true, true, NULL
);
6541 declared
= c
->ts
.u
.derived
;
6543 /* Treat the call as if it is a typebound procedure, in order to roll
6544 out the correct name for the specific function. */
6545 if (!resolve_compcall (e
, &name
))
6547 gfc_free_ref_list (new_ref
);
6554 /* Convert the expression to a procedure pointer component call. */
6555 e
->value
.function
.esym
= NULL
;
6561 /* '_vptr' points to the vtab, which contains the procedure pointers. */
6562 gfc_add_vptr_component (e
);
6563 gfc_add_component_ref (e
, name
);
6565 /* Recover the typespec for the expression. This is really only
6566 necessary for generic procedures, where the additional call
6567 to gfc_add_component_ref seems to throw the collection of the
6568 correct typespec. */
6572 gfc_free_ref_list (new_ref
);
6577 /* Resolve a typebound subroutine, or 'method'. First separate all
6578 the non-CLASS references by calling resolve_typebound_call
6582 resolve_typebound_subroutine (gfc_code
*code
)
6584 gfc_symbol
*declared
;
6594 st
= code
->expr1
->symtree
;
6596 /* Deal with typebound operators for CLASS objects. */
6597 expr
= code
->expr1
->value
.compcall
.base_object
;
6598 overridable
= !code
->expr1
->value
.compcall
.tbp
->non_overridable
;
6599 if (expr
&& expr
->ts
.type
== BT_CLASS
&& code
->expr1
->value
.compcall
.name
)
6601 /* If the base_object is not a variable, the corresponding actual
6602 argument expression must be stored in e->base_expression so
6603 that the corresponding tree temporary can be used as the base
6604 object in gfc_conv_procedure_call. */
6605 if (expr
->expr_type
!= EXPR_VARIABLE
)
6607 gfc_actual_arglist
*args
;
6609 args
= code
->expr1
->value
.function
.actual
;
6610 for (; args
; args
= args
->next
)
6611 if (expr
== args
->expr
)
6615 /* Since the typebound operators are generic, we have to ensure
6616 that any delays in resolution are corrected and that the vtab
6618 declared
= expr
->ts
.u
.derived
;
6619 c
= gfc_find_component (declared
, "_vptr", true, true, NULL
);
6620 if (c
->ts
.u
.derived
== NULL
)
6621 c
->ts
.u
.derived
= gfc_find_derived_vtab (declared
);
6623 if (!resolve_typebound_call (code
, &name
, NULL
))
6626 /* Use the generic name if it is there. */
6627 name
= name
? name
: code
->expr1
->value
.function
.esym
->name
;
6628 code
->expr1
->symtree
= expr
->symtree
;
6629 code
->expr1
->ref
= gfc_copy_ref (expr
->ref
);
6631 /* Trim away the extraneous references that emerge from nested
6632 use of interface.c (extend_expr). */
6633 get_declared_from_expr (&class_ref
, NULL
, code
->expr1
, false);
6634 if (class_ref
&& class_ref
->next
)
6636 gfc_free_ref_list (class_ref
->next
);
6637 class_ref
->next
= NULL
;
6639 else if (code
->expr1
->ref
&& !class_ref
)
6641 gfc_free_ref_list (code
->expr1
->ref
);
6642 code
->expr1
->ref
= NULL
;
6645 /* Now use the procedure in the vtable. */
6646 gfc_add_vptr_component (code
->expr1
);
6647 gfc_add_component_ref (code
->expr1
, name
);
6648 code
->expr1
->value
.function
.esym
= NULL
;
6649 if (expr
->expr_type
!= EXPR_VARIABLE
)
6650 code
->expr1
->base_expr
= expr
;
6655 return resolve_typebound_call (code
, NULL
, NULL
);
6657 if (!resolve_ref (code
->expr1
))
6660 /* Get the CLASS declared type. */
6661 get_declared_from_expr (&class_ref
, &new_ref
, code
->expr1
, true);
6663 /* Weed out cases of the ultimate component being a derived type. */
6664 if ((class_ref
&& gfc_bt_struct (class_ref
->u
.c
.component
->ts
.type
))
6665 || (!class_ref
&& st
->n
.sym
->ts
.type
!= BT_CLASS
))
6667 gfc_free_ref_list (new_ref
);
6668 return resolve_typebound_call (code
, NULL
, NULL
);
6671 if (!resolve_typebound_call (code
, &name
, &overridable
))
6673 gfc_free_ref_list (new_ref
);
6676 ts
= code
->expr1
->ts
;
6680 /* Convert the expression to a procedure pointer component call. */
6681 code
->expr1
->value
.function
.esym
= NULL
;
6682 code
->expr1
->symtree
= st
;
6685 code
->expr1
->ref
= new_ref
;
6687 /* '_vptr' points to the vtab, which contains the procedure pointers. */
6688 gfc_add_vptr_component (code
->expr1
);
6689 gfc_add_component_ref (code
->expr1
, name
);
6691 /* Recover the typespec for the expression. This is really only
6692 necessary for generic procedures, where the additional call
6693 to gfc_add_component_ref seems to throw the collection of the
6694 correct typespec. */
6695 code
->expr1
->ts
= ts
;
6698 gfc_free_ref_list (new_ref
);
6704 /* Resolve a CALL to a Procedure Pointer Component (Subroutine). */
6707 resolve_ppc_call (gfc_code
* c
)
6709 gfc_component
*comp
;
6711 comp
= gfc_get_proc_ptr_comp (c
->expr1
);
6712 gcc_assert (comp
!= NULL
);
6714 c
->resolved_sym
= c
->expr1
->symtree
->n
.sym
;
6715 c
->expr1
->expr_type
= EXPR_VARIABLE
;
6717 if (!comp
->attr
.subroutine
)
6718 gfc_add_subroutine (&comp
->attr
, comp
->name
, &c
->expr1
->where
);
6720 if (!resolve_ref (c
->expr1
))
6723 if (!update_ppc_arglist (c
->expr1
))
6726 c
->ext
.actual
= c
->expr1
->value
.compcall
.actual
;
6728 if (!resolve_actual_arglist (c
->ext
.actual
, comp
->attr
.proc
,
6729 !(comp
->ts
.interface
6730 && comp
->ts
.interface
->formal
)))
6733 if (!pure_subroutine (comp
->ts
.interface
, comp
->name
, &c
->expr1
->where
))
6736 gfc_ppc_use (comp
, &c
->expr1
->value
.compcall
.actual
, &c
->expr1
->where
);
6742 /* Resolve a Function Call to a Procedure Pointer Component (Function). */
6745 resolve_expr_ppc (gfc_expr
* e
)
6747 gfc_component
*comp
;
6749 comp
= gfc_get_proc_ptr_comp (e
);
6750 gcc_assert (comp
!= NULL
);
6752 /* Convert to EXPR_FUNCTION. */
6753 e
->expr_type
= EXPR_FUNCTION
;
6754 e
->value
.function
.isym
= NULL
;
6755 e
->value
.function
.actual
= e
->value
.compcall
.actual
;
6757 if (comp
->as
!= NULL
)
6758 e
->rank
= comp
->as
->rank
;
6760 if (!comp
->attr
.function
)
6761 gfc_add_function (&comp
->attr
, comp
->name
, &e
->where
);
6763 if (!resolve_ref (e
))
6766 if (!resolve_actual_arglist (e
->value
.function
.actual
, comp
->attr
.proc
,
6767 !(comp
->ts
.interface
6768 && comp
->ts
.interface
->formal
)))
6771 if (!update_ppc_arglist (e
))
6774 if (!check_pure_function(e
))
6777 gfc_ppc_use (comp
, &e
->value
.compcall
.actual
, &e
->where
);
6784 gfc_is_expandable_expr (gfc_expr
*e
)
6786 gfc_constructor
*con
;
6788 if (e
->expr_type
== EXPR_ARRAY
)
6790 /* Traverse the constructor looking for variables that are flavor
6791 parameter. Parameters must be expanded since they are fully used at
6793 con
= gfc_constructor_first (e
->value
.constructor
);
6794 for (; con
; con
= gfc_constructor_next (con
))
6796 if (con
->expr
->expr_type
== EXPR_VARIABLE
6797 && con
->expr
->symtree
6798 && (con
->expr
->symtree
->n
.sym
->attr
.flavor
== FL_PARAMETER
6799 || con
->expr
->symtree
->n
.sym
->attr
.flavor
== FL_VARIABLE
))
6801 if (con
->expr
->expr_type
== EXPR_ARRAY
6802 && gfc_is_expandable_expr (con
->expr
))
6811 /* Sometimes variables in specification expressions of the result
6812 of module procedures in submodules wind up not being the 'real'
6813 dummy. Find this, if possible, in the namespace of the first
6817 fixup_unique_dummy (gfc_expr
*e
)
6819 gfc_symtree
*st
= NULL
;
6820 gfc_symbol
*s
= NULL
;
6822 if (e
->symtree
->n
.sym
->ns
->proc_name
6823 && e
->symtree
->n
.sym
->ns
->proc_name
->formal
)
6824 s
= e
->symtree
->n
.sym
->ns
->proc_name
->formal
->sym
;
6827 st
= gfc_find_symtree (s
->ns
->sym_root
, e
->symtree
->n
.sym
->name
);
6830 && st
->n
.sym
!= NULL
6831 && st
->n
.sym
->attr
.dummy
)
6835 /* Resolve an expression. That is, make sure that types of operands agree
6836 with their operators, intrinsic operators are converted to function calls
6837 for overloaded types and unresolved function references are resolved. */
6840 gfc_resolve_expr (gfc_expr
*e
)
6843 bool inquiry_save
, actual_arg_save
, first_actual_arg_save
;
6848 /* inquiry_argument only applies to variables. */
6849 inquiry_save
= inquiry_argument
;
6850 actual_arg_save
= actual_arg
;
6851 first_actual_arg_save
= first_actual_arg
;
6853 if (e
->expr_type
!= EXPR_VARIABLE
)
6855 inquiry_argument
= false;
6857 first_actual_arg
= false;
6859 else if (e
->symtree
!= NULL
6860 && *e
->symtree
->name
== '@'
6861 && e
->symtree
->n
.sym
->attr
.dummy
)
6863 /* Deal with submodule specification expressions that are not
6864 found to be referenced in module.c(read_cleanup). */
6865 fixup_unique_dummy (e
);
6868 switch (e
->expr_type
)
6871 t
= resolve_operator (e
);
6877 if (check_host_association (e
))
6878 t
= resolve_function (e
);
6880 t
= resolve_variable (e
);
6882 if (e
->ts
.type
== BT_CHARACTER
&& e
->ts
.u
.cl
== NULL
&& e
->ref
6883 && e
->ref
->type
!= REF_SUBSTRING
)
6884 gfc_resolve_substring_charlen (e
);
6889 t
= resolve_typebound_function (e
);
6892 case EXPR_SUBSTRING
:
6893 t
= resolve_ref (e
);
6902 t
= resolve_expr_ppc (e
);
6907 if (!resolve_ref (e
))
6910 t
= gfc_resolve_array_constructor (e
);
6911 /* Also try to expand a constructor. */
6914 expression_rank (e
);
6915 if (gfc_is_constant_expr (e
) || gfc_is_expandable_expr (e
))
6916 gfc_expand_constructor (e
, false);
6919 /* This provides the opportunity for the length of constructors with
6920 character valued function elements to propagate the string length
6921 to the expression. */
6922 if (t
&& e
->ts
.type
== BT_CHARACTER
)
6924 /* For efficiency, we call gfc_expand_constructor for BT_CHARACTER
6925 here rather then add a duplicate test for it above. */
6926 gfc_expand_constructor (e
, false);
6927 t
= gfc_resolve_character_array_constructor (e
);
6932 case EXPR_STRUCTURE
:
6933 t
= resolve_ref (e
);
6937 t
= resolve_structure_cons (e
, 0);
6941 t
= gfc_simplify_expr (e
, 0);
6945 gfc_internal_error ("gfc_resolve_expr(): Bad expression type");
6948 if (e
->ts
.type
== BT_CHARACTER
&& t
&& !e
->ts
.u
.cl
)
6951 inquiry_argument
= inquiry_save
;
6952 actual_arg
= actual_arg_save
;
6953 first_actual_arg
= first_actual_arg_save
;
6959 /* Resolve an expression from an iterator. They must be scalar and have
6960 INTEGER or (optionally) REAL type. */
6963 gfc_resolve_iterator_expr (gfc_expr
*expr
, bool real_ok
,
6964 const char *name_msgid
)
6966 if (!gfc_resolve_expr (expr
))
6969 if (expr
->rank
!= 0)
6971 gfc_error ("%s at %L must be a scalar", _(name_msgid
), &expr
->where
);
6975 if (expr
->ts
.type
!= BT_INTEGER
)
6977 if (expr
->ts
.type
== BT_REAL
)
6980 return gfc_notify_std (GFC_STD_F95_DEL
,
6981 "%s at %L must be integer",
6982 _(name_msgid
), &expr
->where
);
6985 gfc_error ("%s at %L must be INTEGER", _(name_msgid
),
6992 gfc_error ("%s at %L must be INTEGER", _(name_msgid
), &expr
->where
);
7000 /* Resolve the expressions in an iterator structure. If REAL_OK is
7001 false allow only INTEGER type iterators, otherwise allow REAL types.
7002 Set own_scope to true for ac-implied-do and data-implied-do as those
7003 have a separate scope such that, e.g., a INTENT(IN) doesn't apply. */
7006 gfc_resolve_iterator (gfc_iterator
*iter
, bool real_ok
, bool own_scope
)
7008 if (!gfc_resolve_iterator_expr (iter
->var
, real_ok
, "Loop variable"))
7011 if (!gfc_check_vardef_context (iter
->var
, false, false, own_scope
,
7012 _("iterator variable")))
7015 if (!gfc_resolve_iterator_expr (iter
->start
, real_ok
,
7016 "Start expression in DO loop"))
7019 if (!gfc_resolve_iterator_expr (iter
->end
, real_ok
,
7020 "End expression in DO loop"))
7023 if (!gfc_resolve_iterator_expr (iter
->step
, real_ok
,
7024 "Step expression in DO loop"))
7027 if (iter
->step
->expr_type
== EXPR_CONSTANT
)
7029 if ((iter
->step
->ts
.type
== BT_INTEGER
7030 && mpz_cmp_ui (iter
->step
->value
.integer
, 0) == 0)
7031 || (iter
->step
->ts
.type
== BT_REAL
7032 && mpfr_sgn (iter
->step
->value
.real
) == 0))
7034 gfc_error ("Step expression in DO loop at %L cannot be zero",
7035 &iter
->step
->where
);
7040 /* Convert start, end, and step to the same type as var. */
7041 if (iter
->start
->ts
.kind
!= iter
->var
->ts
.kind
7042 || iter
->start
->ts
.type
!= iter
->var
->ts
.type
)
7043 gfc_convert_type (iter
->start
, &iter
->var
->ts
, 1);
7045 if (iter
->end
->ts
.kind
!= iter
->var
->ts
.kind
7046 || iter
->end
->ts
.type
!= iter
->var
->ts
.type
)
7047 gfc_convert_type (iter
->end
, &iter
->var
->ts
, 1);
7049 if (iter
->step
->ts
.kind
!= iter
->var
->ts
.kind
7050 || iter
->step
->ts
.type
!= iter
->var
->ts
.type
)
7051 gfc_convert_type (iter
->step
, &iter
->var
->ts
, 1);
7053 if (iter
->start
->expr_type
== EXPR_CONSTANT
7054 && iter
->end
->expr_type
== EXPR_CONSTANT
7055 && iter
->step
->expr_type
== EXPR_CONSTANT
)
7058 if (iter
->start
->ts
.type
== BT_INTEGER
)
7060 sgn
= mpz_cmp_ui (iter
->step
->value
.integer
, 0);
7061 cmp
= mpz_cmp (iter
->end
->value
.integer
, iter
->start
->value
.integer
);
7065 sgn
= mpfr_sgn (iter
->step
->value
.real
);
7066 cmp
= mpfr_cmp (iter
->end
->value
.real
, iter
->start
->value
.real
);
7068 if (warn_zerotrip
&& ((sgn
> 0 && cmp
< 0) || (sgn
< 0 && cmp
> 0)))
7069 gfc_warning (OPT_Wzerotrip
,
7070 "DO loop at %L will be executed zero times",
7071 &iter
->step
->where
);
7074 if (iter
->end
->expr_type
== EXPR_CONSTANT
7075 && iter
->end
->ts
.type
== BT_INTEGER
7076 && iter
->step
->expr_type
== EXPR_CONSTANT
7077 && iter
->step
->ts
.type
== BT_INTEGER
7078 && (mpz_cmp_si (iter
->step
->value
.integer
, -1L) == 0
7079 || mpz_cmp_si (iter
->step
->value
.integer
, 1L) == 0))
7081 bool is_step_positive
= mpz_cmp_ui (iter
->step
->value
.integer
, 1) == 0;
7082 int k
= gfc_validate_kind (BT_INTEGER
, iter
->end
->ts
.kind
, false);
7084 if (is_step_positive
7085 && mpz_cmp (iter
->end
->value
.integer
, gfc_integer_kinds
[k
].huge
) == 0)
7086 gfc_warning (OPT_Wundefined_do_loop
,
7087 "DO loop at %L is undefined as it overflows",
7088 &iter
->step
->where
);
7089 else if (!is_step_positive
7090 && mpz_cmp (iter
->end
->value
.integer
,
7091 gfc_integer_kinds
[k
].min_int
) == 0)
7092 gfc_warning (OPT_Wundefined_do_loop
,
7093 "DO loop at %L is undefined as it underflows",
7094 &iter
->step
->where
);
7101 /* Traversal function for find_forall_index. f == 2 signals that
7102 that variable itself is not to be checked - only the references. */
7105 forall_index (gfc_expr
*expr
, gfc_symbol
*sym
, int *f
)
7107 if (expr
->expr_type
!= EXPR_VARIABLE
)
7110 /* A scalar assignment */
7111 if (!expr
->ref
|| *f
== 1)
7113 if (expr
->symtree
->n
.sym
== sym
)
7125 /* Check whether the FORALL index appears in the expression or not.
7126 Returns true if SYM is found in EXPR. */
7129 find_forall_index (gfc_expr
*expr
, gfc_symbol
*sym
, int f
)
7131 if (gfc_traverse_expr (expr
, sym
, forall_index
, f
))
7138 /* Resolve a list of FORALL iterators. The FORALL index-name is constrained
7139 to be a scalar INTEGER variable. The subscripts and stride are scalar
7140 INTEGERs, and if stride is a constant it must be nonzero.
7141 Furthermore "A subscript or stride in a forall-triplet-spec shall
7142 not contain a reference to any index-name in the
7143 forall-triplet-spec-list in which it appears." (7.5.4.1) */
7146 resolve_forall_iterators (gfc_forall_iterator
*it
)
7148 gfc_forall_iterator
*iter
, *iter2
;
7150 for (iter
= it
; iter
; iter
= iter
->next
)
7152 if (gfc_resolve_expr (iter
->var
)
7153 && (iter
->var
->ts
.type
!= BT_INTEGER
|| iter
->var
->rank
!= 0))
7154 gfc_error ("FORALL index-name at %L must be a scalar INTEGER",
7157 if (gfc_resolve_expr (iter
->start
)
7158 && (iter
->start
->ts
.type
!= BT_INTEGER
|| iter
->start
->rank
!= 0))
7159 gfc_error ("FORALL start expression at %L must be a scalar INTEGER",
7160 &iter
->start
->where
);
7161 if (iter
->var
->ts
.kind
!= iter
->start
->ts
.kind
)
7162 gfc_convert_type (iter
->start
, &iter
->var
->ts
, 1);
7164 if (gfc_resolve_expr (iter
->end
)
7165 && (iter
->end
->ts
.type
!= BT_INTEGER
|| iter
->end
->rank
!= 0))
7166 gfc_error ("FORALL end expression at %L must be a scalar INTEGER",
7168 if (iter
->var
->ts
.kind
!= iter
->end
->ts
.kind
)
7169 gfc_convert_type (iter
->end
, &iter
->var
->ts
, 1);
7171 if (gfc_resolve_expr (iter
->stride
))
7173 if (iter
->stride
->ts
.type
!= BT_INTEGER
|| iter
->stride
->rank
!= 0)
7174 gfc_error ("FORALL stride expression at %L must be a scalar %s",
7175 &iter
->stride
->where
, "INTEGER");
7177 if (iter
->stride
->expr_type
== EXPR_CONSTANT
7178 && mpz_cmp_ui (iter
->stride
->value
.integer
, 0) == 0)
7179 gfc_error ("FORALL stride expression at %L cannot be zero",
7180 &iter
->stride
->where
);
7182 if (iter
->var
->ts
.kind
!= iter
->stride
->ts
.kind
)
7183 gfc_convert_type (iter
->stride
, &iter
->var
->ts
, 1);
7186 for (iter
= it
; iter
; iter
= iter
->next
)
7187 for (iter2
= iter
; iter2
; iter2
= iter2
->next
)
7189 if (find_forall_index (iter2
->start
, iter
->var
->symtree
->n
.sym
, 0)
7190 || find_forall_index (iter2
->end
, iter
->var
->symtree
->n
.sym
, 0)
7191 || find_forall_index (iter2
->stride
, iter
->var
->symtree
->n
.sym
, 0))
7192 gfc_error ("FORALL index %qs may not appear in triplet "
7193 "specification at %L", iter
->var
->symtree
->name
,
7194 &iter2
->start
->where
);
7199 /* Given a pointer to a symbol that is a derived type, see if it's
7200 inaccessible, i.e. if it's defined in another module and the components are
7201 PRIVATE. The search is recursive if necessary. Returns zero if no
7202 inaccessible components are found, nonzero otherwise. */
7205 derived_inaccessible (gfc_symbol
*sym
)
7209 if (sym
->attr
.use_assoc
&& sym
->attr
.private_comp
)
7212 for (c
= sym
->components
; c
; c
= c
->next
)
7214 /* Prevent an infinite loop through this function. */
7215 if (c
->ts
.type
== BT_DERIVED
&& c
->attr
.pointer
7216 && sym
== c
->ts
.u
.derived
)
7219 if (c
->ts
.type
== BT_DERIVED
&& derived_inaccessible (c
->ts
.u
.derived
))
7227 /* Resolve the argument of a deallocate expression. The expression must be
7228 a pointer or a full array. */
7231 resolve_deallocate_expr (gfc_expr
*e
)
7233 symbol_attribute attr
;
7234 int allocatable
, pointer
;
7240 if (!gfc_resolve_expr (e
))
7243 if (e
->expr_type
!= EXPR_VARIABLE
)
7246 sym
= e
->symtree
->n
.sym
;
7247 unlimited
= UNLIMITED_POLY(sym
);
7249 if (sym
->ts
.type
== BT_CLASS
)
7251 allocatable
= CLASS_DATA (sym
)->attr
.allocatable
;
7252 pointer
= CLASS_DATA (sym
)->attr
.class_pointer
;
7256 allocatable
= sym
->attr
.allocatable
;
7257 pointer
= sym
->attr
.pointer
;
7259 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
7264 if (ref
->u
.ar
.type
!= AR_FULL
7265 && !(ref
->u
.ar
.type
== AR_ELEMENT
&& ref
->u
.ar
.as
->rank
== 0
7266 && ref
->u
.ar
.codimen
&& gfc_ref_this_image (ref
)))
7271 c
= ref
->u
.c
.component
;
7272 if (c
->ts
.type
== BT_CLASS
)
7274 allocatable
= CLASS_DATA (c
)->attr
.allocatable
;
7275 pointer
= CLASS_DATA (c
)->attr
.class_pointer
;
7279 allocatable
= c
->attr
.allocatable
;
7280 pointer
= c
->attr
.pointer
;
7291 attr
= gfc_expr_attr (e
);
7293 if (allocatable
== 0 && attr
.pointer
== 0 && !unlimited
)
7296 gfc_error ("Allocate-object at %L must be ALLOCATABLE or a POINTER",
7302 if (gfc_is_coindexed (e
))
7304 gfc_error ("Coindexed allocatable object at %L", &e
->where
);
7309 && !gfc_check_vardef_context (e
, true, true, false,
7310 _("DEALLOCATE object")))
7312 if (!gfc_check_vardef_context (e
, false, true, false,
7313 _("DEALLOCATE object")))
7320 /* Returns true if the expression e contains a reference to the symbol sym. */
7322 sym_in_expr (gfc_expr
*e
, gfc_symbol
*sym
, int *f ATTRIBUTE_UNUSED
)
7324 if (e
->expr_type
== EXPR_VARIABLE
&& e
->symtree
->n
.sym
== sym
)
7331 gfc_find_sym_in_expr (gfc_symbol
*sym
, gfc_expr
*e
)
7333 return gfc_traverse_expr (e
, sym
, sym_in_expr
, 0);
7337 /* Given the expression node e for an allocatable/pointer of derived type to be
7338 allocated, get the expression node to be initialized afterwards (needed for
7339 derived types with default initializers, and derived types with allocatable
7340 components that need nullification.) */
7343 gfc_expr_to_initialize (gfc_expr
*e
)
7349 result
= gfc_copy_expr (e
);
7351 /* Change the last array reference from AR_ELEMENT to AR_FULL. */
7352 for (ref
= result
->ref
; ref
; ref
= ref
->next
)
7353 if (ref
->type
== REF_ARRAY
&& ref
->next
== NULL
)
7355 ref
->u
.ar
.type
= AR_FULL
;
7357 for (i
= 0; i
< ref
->u
.ar
.dimen
; i
++)
7358 ref
->u
.ar
.start
[i
] = ref
->u
.ar
.end
[i
] = ref
->u
.ar
.stride
[i
] = NULL
;
7363 gfc_free_shape (&result
->shape
, result
->rank
);
7365 /* Recalculate rank, shape, etc. */
7366 gfc_resolve_expr (result
);
7371 /* If the last ref of an expression is an array ref, return a copy of the
7372 expression with that one removed. Otherwise, a copy of the original
7373 expression. This is used for allocate-expressions and pointer assignment
7374 LHS, where there may be an array specification that needs to be stripped
7375 off when using gfc_check_vardef_context. */
7378 remove_last_array_ref (gfc_expr
* e
)
7383 e2
= gfc_copy_expr (e
);
7384 for (r
= &e2
->ref
; *r
; r
= &(*r
)->next
)
7385 if ((*r
)->type
== REF_ARRAY
&& !(*r
)->next
)
7387 gfc_free_ref_list (*r
);
7396 /* Used in resolve_allocate_expr to check that a allocation-object and
7397 a source-expr are conformable. This does not catch all possible
7398 cases; in particular a runtime checking is needed. */
7401 conformable_arrays (gfc_expr
*e1
, gfc_expr
*e2
)
7404 for (tail
= e2
->ref
; tail
&& tail
->next
; tail
= tail
->next
);
7406 /* First compare rank. */
7407 if ((tail
&& e1
->rank
!= tail
->u
.ar
.as
->rank
)
7408 || (!tail
&& e1
->rank
!= e2
->rank
))
7410 gfc_error ("Source-expr at %L must be scalar or have the "
7411 "same rank as the allocate-object at %L",
7412 &e1
->where
, &e2
->where
);
7423 for (i
= 0; i
< e1
->rank
; i
++)
7425 if (tail
->u
.ar
.start
[i
] == NULL
)
7428 if (tail
->u
.ar
.end
[i
])
7430 mpz_set (s
, tail
->u
.ar
.end
[i
]->value
.integer
);
7431 mpz_sub (s
, s
, tail
->u
.ar
.start
[i
]->value
.integer
);
7432 mpz_add_ui (s
, s
, 1);
7436 mpz_set (s
, tail
->u
.ar
.start
[i
]->value
.integer
);
7439 if (mpz_cmp (e1
->shape
[i
], s
) != 0)
7441 gfc_error ("Source-expr at %L and allocate-object at %L must "
7442 "have the same shape", &e1
->where
, &e2
->where
);
7455 /* Resolve the expression in an ALLOCATE statement, doing the additional
7456 checks to see whether the expression is OK or not. The expression must
7457 have a trailing array reference that gives the size of the array. */
7460 resolve_allocate_expr (gfc_expr
*e
, gfc_code
*code
, bool *array_alloc_wo_spec
)
7462 int i
, pointer
, allocatable
, dimension
, is_abstract
;
7466 symbol_attribute attr
;
7467 gfc_ref
*ref
, *ref2
;
7470 gfc_symbol
*sym
= NULL
;
7475 /* Mark the utmost array component as being in allocate to allow DIMEN_STAR
7476 checking of coarrays. */
7477 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
7478 if (ref
->next
== NULL
)
7481 if (ref
&& ref
->type
== REF_ARRAY
)
7482 ref
->u
.ar
.in_allocate
= true;
7484 if (!gfc_resolve_expr (e
))
7487 /* Make sure the expression is allocatable or a pointer. If it is
7488 pointer, the next-to-last reference must be a pointer. */
7492 sym
= e
->symtree
->n
.sym
;
7494 /* Check whether ultimate component is abstract and CLASS. */
7497 /* Is the allocate-object unlimited polymorphic? */
7498 unlimited
= UNLIMITED_POLY(e
);
7500 if (e
->expr_type
!= EXPR_VARIABLE
)
7503 attr
= gfc_expr_attr (e
);
7504 pointer
= attr
.pointer
;
7505 dimension
= attr
.dimension
;
7506 codimension
= attr
.codimension
;
7510 if (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
))
7512 allocatable
= CLASS_DATA (sym
)->attr
.allocatable
;
7513 pointer
= CLASS_DATA (sym
)->attr
.class_pointer
;
7514 dimension
= CLASS_DATA (sym
)->attr
.dimension
;
7515 codimension
= CLASS_DATA (sym
)->attr
.codimension
;
7516 is_abstract
= CLASS_DATA (sym
)->attr
.abstract
;
7520 allocatable
= sym
->attr
.allocatable
;
7521 pointer
= sym
->attr
.pointer
;
7522 dimension
= sym
->attr
.dimension
;
7523 codimension
= sym
->attr
.codimension
;
7528 for (ref
= e
->ref
; ref
; ref2
= ref
, ref
= ref
->next
)
7533 if (ref
->u
.ar
.codimen
> 0)
7536 for (n
= ref
->u
.ar
.dimen
;
7537 n
< ref
->u
.ar
.dimen
+ ref
->u
.ar
.codimen
; n
++)
7538 if (ref
->u
.ar
.dimen_type
[n
] != DIMEN_THIS_IMAGE
)
7545 if (ref
->next
!= NULL
)
7553 gfc_error ("Coindexed allocatable object at %L",
7558 c
= ref
->u
.c
.component
;
7559 if (c
->ts
.type
== BT_CLASS
)
7561 allocatable
= CLASS_DATA (c
)->attr
.allocatable
;
7562 pointer
= CLASS_DATA (c
)->attr
.class_pointer
;
7563 dimension
= CLASS_DATA (c
)->attr
.dimension
;
7564 codimension
= CLASS_DATA (c
)->attr
.codimension
;
7565 is_abstract
= CLASS_DATA (c
)->attr
.abstract
;
7569 allocatable
= c
->attr
.allocatable
;
7570 pointer
= c
->attr
.pointer
;
7571 dimension
= c
->attr
.dimension
;
7572 codimension
= c
->attr
.codimension
;
7573 is_abstract
= c
->attr
.abstract
;
7586 /* Check for F08:C628. */
7587 if (allocatable
== 0 && pointer
== 0 && !unlimited
)
7589 gfc_error ("Allocate-object at %L must be ALLOCATABLE or a POINTER",
7594 /* Some checks for the SOURCE tag. */
7597 /* Check F03:C631. */
7598 if (!gfc_type_compatible (&e
->ts
, &code
->expr3
->ts
))
7600 gfc_error ("Type of entity at %L is type incompatible with "
7601 "source-expr at %L", &e
->where
, &code
->expr3
->where
);
7605 /* Check F03:C632 and restriction following Note 6.18. */
7606 if (code
->expr3
->rank
> 0 && !conformable_arrays (code
->expr3
, e
))
7609 /* Check F03:C633. */
7610 if (code
->expr3
->ts
.kind
!= e
->ts
.kind
&& !unlimited
)
7612 gfc_error ("The allocate-object at %L and the source-expr at %L "
7613 "shall have the same kind type parameter",
7614 &e
->where
, &code
->expr3
->where
);
7618 /* Check F2008, C642. */
7619 if (code
->expr3
->ts
.type
== BT_DERIVED
7620 && ((codimension
&& gfc_expr_attr (code
->expr3
).lock_comp
)
7621 || (code
->expr3
->ts
.u
.derived
->from_intmod
7622 == INTMOD_ISO_FORTRAN_ENV
7623 && code
->expr3
->ts
.u
.derived
->intmod_sym_id
7624 == ISOFORTRAN_LOCK_TYPE
)))
7626 gfc_error ("The source-expr at %L shall neither be of type "
7627 "LOCK_TYPE nor have a LOCK_TYPE component if "
7628 "allocate-object at %L is a coarray",
7629 &code
->expr3
->where
, &e
->where
);
7633 /* Check TS18508, C702/C703. */
7634 if (code
->expr3
->ts
.type
== BT_DERIVED
7635 && ((codimension
&& gfc_expr_attr (code
->expr3
).event_comp
)
7636 || (code
->expr3
->ts
.u
.derived
->from_intmod
7637 == INTMOD_ISO_FORTRAN_ENV
7638 && code
->expr3
->ts
.u
.derived
->intmod_sym_id
7639 == ISOFORTRAN_EVENT_TYPE
)))
7641 gfc_error ("The source-expr at %L shall neither be of type "
7642 "EVENT_TYPE nor have a EVENT_TYPE component if "
7643 "allocate-object at %L is a coarray",
7644 &code
->expr3
->where
, &e
->where
);
7649 /* Check F08:C629. */
7650 if (is_abstract
&& code
->ext
.alloc
.ts
.type
== BT_UNKNOWN
7653 gcc_assert (e
->ts
.type
== BT_CLASS
);
7654 gfc_error ("Allocating %s of ABSTRACT base type at %L requires a "
7655 "type-spec or source-expr", sym
->name
, &e
->where
);
7659 /* Check F08:C632. */
7660 if (code
->ext
.alloc
.ts
.type
== BT_CHARACTER
&& !e
->ts
.deferred
7661 && !UNLIMITED_POLY (e
))
7665 if (!e
->ts
.u
.cl
->length
)
7668 cmp
= gfc_dep_compare_expr (e
->ts
.u
.cl
->length
,
7669 code
->ext
.alloc
.ts
.u
.cl
->length
);
7670 if (cmp
== 1 || cmp
== -1 || cmp
== -3)
7672 gfc_error ("Allocating %s at %L with type-spec requires the same "
7673 "character-length parameter as in the declaration",
7674 sym
->name
, &e
->where
);
7679 /* In the variable definition context checks, gfc_expr_attr is used
7680 on the expression. This is fooled by the array specification
7681 present in e, thus we have to eliminate that one temporarily. */
7682 e2
= remove_last_array_ref (e
);
7685 t
= gfc_check_vardef_context (e2
, true, true, false,
7686 _("ALLOCATE object"));
7688 t
= gfc_check_vardef_context (e2
, false, true, false,
7689 _("ALLOCATE object"));
7694 if (e
->ts
.type
== BT_CLASS
&& CLASS_DATA (e
)->attr
.dimension
7695 && !code
->expr3
&& code
->ext
.alloc
.ts
.type
== BT_DERIVED
)
7697 /* For class arrays, the initialization with SOURCE is done
7698 using _copy and trans_call. It is convenient to exploit that
7699 when the allocated type is different from the declared type but
7700 no SOURCE exists by setting expr3. */
7701 code
->expr3
= gfc_default_initializer (&code
->ext
.alloc
.ts
);
7703 else if (flag_coarray
!= GFC_FCOARRAY_LIB
&& e
->ts
.type
== BT_DERIVED
7704 && e
->ts
.u
.derived
->from_intmod
== INTMOD_ISO_FORTRAN_ENV
7705 && e
->ts
.u
.derived
->intmod_sym_id
== ISOFORTRAN_EVENT_TYPE
)
7707 /* We have to zero initialize the integer variable. */
7708 code
->expr3
= gfc_get_int_expr (gfc_default_integer_kind
, &e
->where
, 0);
7711 if (e
->ts
.type
== BT_CLASS
&& !unlimited
&& !UNLIMITED_POLY (code
->expr3
))
7713 /* Make sure the vtab symbol is present when
7714 the module variables are generated. */
7715 gfc_typespec ts
= e
->ts
;
7717 ts
= code
->expr3
->ts
;
7718 else if (code
->ext
.alloc
.ts
.type
== BT_DERIVED
)
7719 ts
= code
->ext
.alloc
.ts
;
7721 /* Finding the vtab also publishes the type's symbol. Therefore this
7722 statement is necessary. */
7723 gfc_find_derived_vtab (ts
.u
.derived
);
7725 else if (unlimited
&& !UNLIMITED_POLY (code
->expr3
))
7727 /* Again, make sure the vtab symbol is present when
7728 the module variables are generated. */
7729 gfc_typespec
*ts
= NULL
;
7731 ts
= &code
->expr3
->ts
;
7733 ts
= &code
->ext
.alloc
.ts
;
7737 /* Finding the vtab also publishes the type's symbol. Therefore this
7738 statement is necessary. */
7742 if (dimension
== 0 && codimension
== 0)
7745 /* Make sure the last reference node is an array specification. */
7747 if (!ref2
|| ref2
->type
!= REF_ARRAY
|| ref2
->u
.ar
.type
== AR_FULL
7748 || (dimension
&& ref2
->u
.ar
.dimen
== 0))
7753 if (!gfc_notify_std (GFC_STD_F2008
, "Array specification required "
7754 "in ALLOCATE statement at %L", &e
->where
))
7756 if (code
->expr3
->rank
!= 0)
7757 *array_alloc_wo_spec
= true;
7760 gfc_error ("Array specification or array-valued SOURCE= "
7761 "expression required in ALLOCATE statement at %L",
7768 gfc_error ("Array specification required in ALLOCATE statement "
7769 "at %L", &e
->where
);
7774 /* Make sure that the array section reference makes sense in the
7775 context of an ALLOCATE specification. */
7780 for (i
= ar
->dimen
; i
< ar
->dimen
+ ar
->codimen
; i
++)
7782 switch (ar
->dimen_type
[i
])
7784 case DIMEN_THIS_IMAGE
:
7785 gfc_error ("Coarray specification required in ALLOCATE statement "
7786 "at %L", &e
->where
);
7790 if (ar
->start
[i
] == 0 || ar
->end
[i
] == 0)
7792 /* If ar->stride[i] is NULL, we issued a previous error. */
7793 if (ar
->stride
[i
] == NULL
)
7794 gfc_error ("Bad array specification in ALLOCATE statement "
7795 "at %L", &e
->where
);
7798 else if (gfc_dep_compare_expr (ar
->start
[i
], ar
->end
[i
]) == 1)
7800 gfc_error ("Upper cobound is less than lower cobound at %L",
7801 &ar
->start
[i
]->where
);
7807 if (ar
->start
[i
]->expr_type
== EXPR_CONSTANT
)
7809 gcc_assert (ar
->start
[i
]->ts
.type
== BT_INTEGER
);
7810 if (mpz_cmp_si (ar
->start
[i
]->value
.integer
, 1) < 0)
7812 gfc_error ("Upper cobound is less than lower cobound "
7813 "of 1 at %L", &ar
->start
[i
]->where
);
7823 gfc_error ("Bad array specification in ALLOCATE statement at %L",
7829 for (i
= 0; i
< ar
->dimen
; i
++)
7831 if (ar
->type
== AR_ELEMENT
|| ar
->type
== AR_FULL
)
7834 switch (ar
->dimen_type
[i
])
7840 if (ar
->start
[i
] != NULL
7841 && ar
->end
[i
] != NULL
7842 && ar
->stride
[i
] == NULL
)
7850 case DIMEN_THIS_IMAGE
:
7851 gfc_error ("Bad array specification in ALLOCATE statement at %L",
7857 for (a
= code
->ext
.alloc
.list
; a
; a
= a
->next
)
7859 sym
= a
->expr
->symtree
->n
.sym
;
7861 /* TODO - check derived type components. */
7862 if (gfc_bt_struct (sym
->ts
.type
) || sym
->ts
.type
== BT_CLASS
)
7865 if ((ar
->start
[i
] != NULL
7866 && gfc_find_sym_in_expr (sym
, ar
->start
[i
]))
7867 || (ar
->end
[i
] != NULL
7868 && gfc_find_sym_in_expr (sym
, ar
->end
[i
])))
7870 gfc_error ("%qs must not appear in the array specification at "
7871 "%L in the same ALLOCATE statement where it is "
7872 "itself allocated", sym
->name
, &ar
->where
);
7878 for (i
= ar
->dimen
; i
< ar
->codimen
+ ar
->dimen
; i
++)
7880 if (ar
->dimen_type
[i
] == DIMEN_ELEMENT
7881 || ar
->dimen_type
[i
] == DIMEN_RANGE
)
7883 if (i
== (ar
->dimen
+ ar
->codimen
- 1))
7885 gfc_error ("Expected '*' in coindex specification in ALLOCATE "
7886 "statement at %L", &e
->where
);
7892 if (ar
->dimen_type
[i
] == DIMEN_STAR
&& i
== (ar
->dimen
+ ar
->codimen
- 1)
7893 && ar
->stride
[i
] == NULL
)
7896 gfc_error ("Bad coarray specification in ALLOCATE statement at %L",
7910 resolve_allocate_deallocate (gfc_code
*code
, const char *fcn
)
7912 gfc_expr
*stat
, *errmsg
, *pe
, *qe
;
7913 gfc_alloc
*a
, *p
, *q
;
7916 errmsg
= code
->expr2
;
7918 /* Check the stat variable. */
7921 gfc_check_vardef_context (stat
, false, false, false,
7922 _("STAT variable"));
7924 if ((stat
->ts
.type
!= BT_INTEGER
7925 && !(stat
->ref
&& (stat
->ref
->type
== REF_ARRAY
7926 || stat
->ref
->type
== REF_COMPONENT
)))
7928 gfc_error ("Stat-variable at %L must be a scalar INTEGER "
7929 "variable", &stat
->where
);
7931 for (p
= code
->ext
.alloc
.list
; p
; p
= p
->next
)
7932 if (p
->expr
->symtree
->n
.sym
->name
== stat
->symtree
->n
.sym
->name
)
7934 gfc_ref
*ref1
, *ref2
;
7937 for (ref1
= p
->expr
->ref
, ref2
= stat
->ref
; ref1
&& ref2
;
7938 ref1
= ref1
->next
, ref2
= ref2
->next
)
7940 if (ref1
->type
!= REF_COMPONENT
|| ref2
->type
!= REF_COMPONENT
)
7942 if (ref1
->u
.c
.component
->name
!= ref2
->u
.c
.component
->name
)
7951 gfc_error ("Stat-variable at %L shall not be %sd within "
7952 "the same %s statement", &stat
->where
, fcn
, fcn
);
7958 /* Check the errmsg variable. */
7962 gfc_warning (0, "ERRMSG at %L is useless without a STAT tag",
7965 gfc_check_vardef_context (errmsg
, false, false, false,
7966 _("ERRMSG variable"));
7968 /* F18:R928 alloc-opt is ERRMSG = errmsg-variable
7969 F18:R930 errmsg-variable is scalar-default-char-variable
7970 F18:R906 default-char-variable is variable
7971 F18:C906 default-char-variable shall be default character. */
7972 if ((errmsg
->ts
.type
!= BT_CHARACTER
7974 && (errmsg
->ref
->type
== REF_ARRAY
7975 || errmsg
->ref
->type
== REF_COMPONENT
)))
7977 || errmsg
->ts
.kind
!= gfc_default_character_kind
)
7978 gfc_error ("ERRMSG variable at %L shall be a scalar default CHARACTER "
7979 "variable", &errmsg
->where
);
7981 for (p
= code
->ext
.alloc
.list
; p
; p
= p
->next
)
7982 if (p
->expr
->symtree
->n
.sym
->name
== errmsg
->symtree
->n
.sym
->name
)
7984 gfc_ref
*ref1
, *ref2
;
7987 for (ref1
= p
->expr
->ref
, ref2
= errmsg
->ref
; ref1
&& ref2
;
7988 ref1
= ref1
->next
, ref2
= ref2
->next
)
7990 if (ref1
->type
!= REF_COMPONENT
|| ref2
->type
!= REF_COMPONENT
)
7992 if (ref1
->u
.c
.component
->name
!= ref2
->u
.c
.component
->name
)
8001 gfc_error ("Errmsg-variable at %L shall not be %sd within "
8002 "the same %s statement", &errmsg
->where
, fcn
, fcn
);
8008 /* Check that an allocate-object appears only once in the statement. */
8010 for (p
= code
->ext
.alloc
.list
; p
; p
= p
->next
)
8013 for (q
= p
->next
; q
; q
= q
->next
)
8016 if (pe
->symtree
->n
.sym
->name
== qe
->symtree
->n
.sym
->name
)
8018 /* This is a potential collision. */
8019 gfc_ref
*pr
= pe
->ref
;
8020 gfc_ref
*qr
= qe
->ref
;
8022 /* Follow the references until
8023 a) They start to differ, in which case there is no error;
8024 you can deallocate a%b and a%c in a single statement
8025 b) Both of them stop, which is an error
8026 c) One of them stops, which is also an error. */
8029 if (pr
== NULL
&& qr
== NULL
)
8031 gfc_error ("Allocate-object at %L also appears at %L",
8032 &pe
->where
, &qe
->where
);
8035 else if (pr
!= NULL
&& qr
== NULL
)
8037 gfc_error ("Allocate-object at %L is subobject of"
8038 " object at %L", &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", &qe
->where
, &pe
->where
);
8047 /* Here, pr != NULL && qr != NULL */
8048 gcc_assert(pr
->type
== qr
->type
);
8049 if (pr
->type
== REF_ARRAY
)
8051 /* Handle cases like allocate(v(3)%x(3), v(2)%x(3)),
8053 gcc_assert (qr
->type
== REF_ARRAY
);
8055 if (pr
->next
&& qr
->next
)
8058 gfc_array_ref
*par
= &(pr
->u
.ar
);
8059 gfc_array_ref
*qar
= &(qr
->u
.ar
);
8061 for (i
=0; i
<par
->dimen
; i
++)
8063 if ((par
->start
[i
] != NULL
8064 || qar
->start
[i
] != NULL
)
8065 && gfc_dep_compare_expr (par
->start
[i
],
8066 qar
->start
[i
]) != 0)
8073 if (pr
->u
.c
.component
->name
!= qr
->u
.c
.component
->name
)
8086 if (strcmp (fcn
, "ALLOCATE") == 0)
8088 bool arr_alloc_wo_spec
= false;
8090 /* Resolving the expr3 in the loop over all objects to allocate would
8091 execute loop invariant code for each loop item. Therefore do it just
8093 if (code
->expr3
&& code
->expr3
->mold
8094 && code
->expr3
->ts
.type
== BT_DERIVED
)
8096 /* Default initialization via MOLD (non-polymorphic). */
8097 gfc_expr
*rhs
= gfc_default_initializer (&code
->expr3
->ts
);
8100 gfc_resolve_expr (rhs
);
8101 gfc_free_expr (code
->expr3
);
8105 for (a
= code
->ext
.alloc
.list
; a
; a
= a
->next
)
8106 resolve_allocate_expr (a
->expr
, code
, &arr_alloc_wo_spec
);
8108 if (arr_alloc_wo_spec
&& code
->expr3
)
8110 /* Mark the allocate to have to take the array specification
8112 code
->ext
.alloc
.arr_spec_from_expr3
= 1;
8117 for (a
= code
->ext
.alloc
.list
; a
; a
= a
->next
)
8118 resolve_deallocate_expr (a
->expr
);
8123 /************ SELECT CASE resolution subroutines ************/
8125 /* Callback function for our mergesort variant. Determines interval
8126 overlaps for CASEs. Return <0 if op1 < op2, 0 for overlap, >0 for
8127 op1 > op2. Assumes we're not dealing with the default case.
8128 We have op1 = (:L), (K:L) or (K:) and op2 = (:N), (M:N) or (M:).
8129 There are nine situations to check. */
8132 compare_cases (const gfc_case
*op1
, const gfc_case
*op2
)
8136 if (op1
->low
== NULL
) /* op1 = (:L) */
8138 /* op2 = (:N), so overlap. */
8140 /* op2 = (M:) or (M:N), L < M */
8141 if (op2
->low
!= NULL
8142 && gfc_compare_expr (op1
->high
, op2
->low
, INTRINSIC_LT
) < 0)
8145 else if (op1
->high
== NULL
) /* op1 = (K:) */
8147 /* op2 = (M:), so overlap. */
8149 /* op2 = (:N) or (M:N), K > N */
8150 if (op2
->high
!= NULL
8151 && gfc_compare_expr (op1
->low
, op2
->high
, INTRINSIC_GT
) > 0)
8154 else /* op1 = (K:L) */
8156 if (op2
->low
== NULL
) /* op2 = (:N), K > N */
8157 retval
= (gfc_compare_expr (op1
->low
, op2
->high
, INTRINSIC_GT
) > 0)
8159 else if (op2
->high
== NULL
) /* op2 = (M:), L < M */
8160 retval
= (gfc_compare_expr (op1
->high
, op2
->low
, INTRINSIC_LT
) < 0)
8162 else /* op2 = (M:N) */
8166 if (gfc_compare_expr (op1
->high
, op2
->low
, INTRINSIC_LT
) < 0)
8169 else if (gfc_compare_expr (op1
->low
, op2
->high
, INTRINSIC_GT
) > 0)
8178 /* Merge-sort a double linked case list, detecting overlap in the
8179 process. LIST is the head of the double linked case list before it
8180 is sorted. Returns the head of the sorted list if we don't see any
8181 overlap, or NULL otherwise. */
8184 check_case_overlap (gfc_case
*list
)
8186 gfc_case
*p
, *q
, *e
, *tail
;
8187 int insize
, nmerges
, psize
, qsize
, cmp
, overlap_seen
;
8189 /* If the passed list was empty, return immediately. */
8196 /* Loop unconditionally. The only exit from this loop is a return
8197 statement, when we've finished sorting the case list. */
8204 /* Count the number of merges we do in this pass. */
8207 /* Loop while there exists a merge to be done. */
8212 /* Count this merge. */
8215 /* Cut the list in two pieces by stepping INSIZE places
8216 forward in the list, starting from P. */
8219 for (i
= 0; i
< insize
; i
++)
8228 /* Now we have two lists. Merge them! */
8229 while (psize
> 0 || (qsize
> 0 && q
!= NULL
))
8231 /* See from which the next case to merge comes from. */
8234 /* P is empty so the next case must come from Q. */
8239 else if (qsize
== 0 || q
== NULL
)
8248 cmp
= compare_cases (p
, q
);
8251 /* The whole case range for P is less than the
8259 /* The whole case range for Q is greater than
8260 the case range for P. */
8267 /* The cases overlap, or they are the same
8268 element in the list. Either way, we must
8269 issue an error and get the next case from P. */
8270 /* FIXME: Sort P and Q by line number. */
8271 gfc_error ("CASE label at %L overlaps with CASE "
8272 "label at %L", &p
->where
, &q
->where
);
8280 /* Add the next element to the merged list. */
8289 /* P has now stepped INSIZE places along, and so has Q. So
8290 they're the same. */
8295 /* If we have done only one merge or none at all, we've
8296 finished sorting the cases. */
8305 /* Otherwise repeat, merging lists twice the size. */
8311 /* Check to see if an expression is suitable for use in a CASE statement.
8312 Makes sure that all case expressions are scalar constants of the same
8313 type. Return false if anything is wrong. */
8316 validate_case_label_expr (gfc_expr
*e
, gfc_expr
*case_expr
)
8318 if (e
== NULL
) return true;
8320 if (e
->ts
.type
!= case_expr
->ts
.type
)
8322 gfc_error ("Expression in CASE statement at %L must be of type %s",
8323 &e
->where
, gfc_basic_typename (case_expr
->ts
.type
));
8327 /* C805 (R808) For a given case-construct, each case-value shall be of
8328 the same type as case-expr. For character type, length differences
8329 are allowed, but the kind type parameters shall be the same. */
8331 if (case_expr
->ts
.type
== BT_CHARACTER
&& e
->ts
.kind
!= case_expr
->ts
.kind
)
8333 gfc_error ("Expression in CASE statement at %L must be of kind %d",
8334 &e
->where
, case_expr
->ts
.kind
);
8338 /* Convert the case value kind to that of case expression kind,
8341 if (e
->ts
.kind
!= case_expr
->ts
.kind
)
8342 gfc_convert_type_warn (e
, &case_expr
->ts
, 2, 0);
8346 gfc_error ("Expression in CASE statement at %L must be scalar",
8355 /* Given a completely parsed select statement, we:
8357 - Validate all expressions and code within the SELECT.
8358 - Make sure that the selection expression is not of the wrong type.
8359 - Make sure that no case ranges overlap.
8360 - Eliminate unreachable cases and unreachable code resulting from
8361 removing case labels.
8363 The standard does allow unreachable cases, e.g. CASE (5:3). But
8364 they are a hassle for code generation, and to prevent that, we just
8365 cut them out here. This is not necessary for overlapping cases
8366 because they are illegal and we never even try to generate code.
8368 We have the additional caveat that a SELECT construct could have
8369 been a computed GOTO in the source code. Fortunately we can fairly
8370 easily work around that here: The case_expr for a "real" SELECT CASE
8371 is in code->expr1, but for a computed GOTO it is in code->expr2. All
8372 we have to do is make sure that the case_expr is a scalar integer
8376 resolve_select (gfc_code
*code
, bool select_type
)
8379 gfc_expr
*case_expr
;
8380 gfc_case
*cp
, *default_case
, *tail
, *head
;
8381 int seen_unreachable
;
8387 if (code
->expr1
== NULL
)
8389 /* This was actually a computed GOTO statement. */
8390 case_expr
= code
->expr2
;
8391 if (case_expr
->ts
.type
!= BT_INTEGER
|| case_expr
->rank
!= 0)
8392 gfc_error ("Selection expression in computed GOTO statement "
8393 "at %L must be a scalar integer expression",
8396 /* Further checking is not necessary because this SELECT was built
8397 by the compiler, so it should always be OK. Just move the
8398 case_expr from expr2 to expr so that we can handle computed
8399 GOTOs as normal SELECTs from here on. */
8400 code
->expr1
= code
->expr2
;
8405 case_expr
= code
->expr1
;
8406 type
= case_expr
->ts
.type
;
8409 if (type
!= BT_LOGICAL
&& type
!= BT_INTEGER
&& type
!= BT_CHARACTER
)
8411 gfc_error ("Argument of SELECT statement at %L cannot be %s",
8412 &case_expr
->where
, gfc_typename (&case_expr
->ts
));
8414 /* Punt. Going on here just produce more garbage error messages. */
8419 if (!select_type
&& case_expr
->rank
!= 0)
8421 gfc_error ("Argument of SELECT statement at %L must be a scalar "
8422 "expression", &case_expr
->where
);
8428 /* Raise a warning if an INTEGER case value exceeds the range of
8429 the case-expr. Later, all expressions will be promoted to the
8430 largest kind of all case-labels. */
8432 if (type
== BT_INTEGER
)
8433 for (body
= code
->block
; body
; body
= body
->block
)
8434 for (cp
= body
->ext
.block
.case_list
; cp
; cp
= cp
->next
)
8437 && gfc_check_integer_range (cp
->low
->value
.integer
,
8438 case_expr
->ts
.kind
) != ARITH_OK
)
8439 gfc_warning (0, "Expression in CASE statement at %L is "
8440 "not in the range of %s", &cp
->low
->where
,
8441 gfc_typename (&case_expr
->ts
));
8444 && cp
->low
!= cp
->high
8445 && gfc_check_integer_range (cp
->high
->value
.integer
,
8446 case_expr
->ts
.kind
) != ARITH_OK
)
8447 gfc_warning (0, "Expression in CASE statement at %L is "
8448 "not in the range of %s", &cp
->high
->where
,
8449 gfc_typename (&case_expr
->ts
));
8452 /* PR 19168 has a long discussion concerning a mismatch of the kinds
8453 of the SELECT CASE expression and its CASE values. Walk the lists
8454 of case values, and if we find a mismatch, promote case_expr to
8455 the appropriate kind. */
8457 if (type
== BT_LOGICAL
|| type
== BT_INTEGER
)
8459 for (body
= code
->block
; body
; body
= body
->block
)
8461 /* Walk the case label list. */
8462 for (cp
= body
->ext
.block
.case_list
; cp
; cp
= cp
->next
)
8464 /* Intercept the DEFAULT case. It does not have a kind. */
8465 if (cp
->low
== NULL
&& cp
->high
== NULL
)
8468 /* Unreachable case ranges are discarded, so ignore. */
8469 if (cp
->low
!= NULL
&& cp
->high
!= NULL
8470 && cp
->low
!= cp
->high
8471 && gfc_compare_expr (cp
->low
, cp
->high
, INTRINSIC_GT
) > 0)
8475 && case_expr
->ts
.kind
!= gfc_kind_max(case_expr
, cp
->low
))
8476 gfc_convert_type_warn (case_expr
, &cp
->low
->ts
, 2, 0);
8478 if (cp
->high
!= NULL
8479 && case_expr
->ts
.kind
!= gfc_kind_max(case_expr
, cp
->high
))
8480 gfc_convert_type_warn (case_expr
, &cp
->high
->ts
, 2, 0);
8485 /* Assume there is no DEFAULT case. */
8486 default_case
= NULL
;
8491 for (body
= code
->block
; body
; body
= body
->block
)
8493 /* Assume the CASE list is OK, and all CASE labels can be matched. */
8495 seen_unreachable
= 0;
8497 /* Walk the case label list, making sure that all case labels
8499 for (cp
= body
->ext
.block
.case_list
; cp
; cp
= cp
->next
)
8501 /* Count the number of cases in the whole construct. */
8504 /* Intercept the DEFAULT case. */
8505 if (cp
->low
== NULL
&& cp
->high
== NULL
)
8507 if (default_case
!= NULL
)
8509 gfc_error ("The DEFAULT CASE at %L cannot be followed "
8510 "by a second DEFAULT CASE at %L",
8511 &default_case
->where
, &cp
->where
);
8522 /* Deal with single value cases and case ranges. Errors are
8523 issued from the validation function. */
8524 if (!validate_case_label_expr (cp
->low
, case_expr
)
8525 || !validate_case_label_expr (cp
->high
, case_expr
))
8531 if (type
== BT_LOGICAL
8532 && ((cp
->low
== NULL
|| cp
->high
== NULL
)
8533 || cp
->low
!= cp
->high
))
8535 gfc_error ("Logical range in CASE statement at %L is not "
8536 "allowed", &cp
->low
->where
);
8541 if (type
== BT_LOGICAL
&& cp
->low
->expr_type
== EXPR_CONSTANT
)
8544 value
= cp
->low
->value
.logical
== 0 ? 2 : 1;
8545 if (value
& seen_logical
)
8547 gfc_error ("Constant logical value in CASE statement "
8548 "is repeated at %L",
8553 seen_logical
|= value
;
8556 if (cp
->low
!= NULL
&& cp
->high
!= NULL
8557 && cp
->low
!= cp
->high
8558 && gfc_compare_expr (cp
->low
, cp
->high
, INTRINSIC_GT
) > 0)
8560 if (warn_surprising
)
8561 gfc_warning (OPT_Wsurprising
,
8562 "Range specification at %L can never be matched",
8565 cp
->unreachable
= 1;
8566 seen_unreachable
= 1;
8570 /* If the case range can be matched, it can also overlap with
8571 other cases. To make sure it does not, we put it in a
8572 double linked list here. We sort that with a merge sort
8573 later on to detect any overlapping cases. */
8577 head
->right
= head
->left
= NULL
;
8582 tail
->right
->left
= tail
;
8589 /* It there was a failure in the previous case label, give up
8590 for this case label list. Continue with the next block. */
8594 /* See if any case labels that are unreachable have been seen.
8595 If so, we eliminate them. This is a bit of a kludge because
8596 the case lists for a single case statement (label) is a
8597 single forward linked lists. */
8598 if (seen_unreachable
)
8600 /* Advance until the first case in the list is reachable. */
8601 while (body
->ext
.block
.case_list
!= NULL
8602 && body
->ext
.block
.case_list
->unreachable
)
8604 gfc_case
*n
= body
->ext
.block
.case_list
;
8605 body
->ext
.block
.case_list
= body
->ext
.block
.case_list
->next
;
8607 gfc_free_case_list (n
);
8610 /* Strip all other unreachable cases. */
8611 if (body
->ext
.block
.case_list
)
8613 for (cp
= body
->ext
.block
.case_list
; cp
&& cp
->next
; cp
= cp
->next
)
8615 if (cp
->next
->unreachable
)
8617 gfc_case
*n
= cp
->next
;
8618 cp
->next
= cp
->next
->next
;
8620 gfc_free_case_list (n
);
8627 /* See if there were overlapping cases. If the check returns NULL,
8628 there was overlap. In that case we don't do anything. If head
8629 is non-NULL, we prepend the DEFAULT case. The sorted list can
8630 then used during code generation for SELECT CASE constructs with
8631 a case expression of a CHARACTER type. */
8634 head
= check_case_overlap (head
);
8636 /* Prepend the default_case if it is there. */
8637 if (head
!= NULL
&& default_case
)
8639 default_case
->left
= NULL
;
8640 default_case
->right
= head
;
8641 head
->left
= default_case
;
8645 /* Eliminate dead blocks that may be the result if we've seen
8646 unreachable case labels for a block. */
8647 for (body
= code
; body
&& body
->block
; body
= body
->block
)
8649 if (body
->block
->ext
.block
.case_list
== NULL
)
8651 /* Cut the unreachable block from the code chain. */
8652 gfc_code
*c
= body
->block
;
8653 body
->block
= c
->block
;
8655 /* Kill the dead block, but not the blocks below it. */
8657 gfc_free_statements (c
);
8661 /* More than two cases is legal but insane for logical selects.
8662 Issue a warning for it. */
8663 if (warn_surprising
&& type
== BT_LOGICAL
&& ncases
> 2)
8664 gfc_warning (OPT_Wsurprising
,
8665 "Logical SELECT CASE block at %L has more that two cases",
8670 /* Check if a derived type is extensible. */
8673 gfc_type_is_extensible (gfc_symbol
*sym
)
8675 return !(sym
->attr
.is_bind_c
|| sym
->attr
.sequence
8676 || (sym
->attr
.is_class
8677 && sym
->components
->ts
.u
.derived
->attr
.unlimited_polymorphic
));
8682 resolve_types (gfc_namespace
*ns
);
8684 /* Resolve an associate-name: Resolve target and ensure the type-spec is
8685 correct as well as possibly the array-spec. */
8688 resolve_assoc_var (gfc_symbol
* sym
, bool resolve_target
)
8692 gcc_assert (sym
->assoc
);
8693 gcc_assert (sym
->attr
.flavor
== FL_VARIABLE
);
8695 /* If this is for SELECT TYPE, the target may not yet be set. In that
8696 case, return. Resolution will be called later manually again when
8698 target
= sym
->assoc
->target
;
8701 gcc_assert (!sym
->assoc
->dangling
);
8703 if (resolve_target
&& !gfc_resolve_expr (target
))
8706 /* For variable targets, we get some attributes from the target. */
8707 if (target
->expr_type
== EXPR_VARIABLE
)
8711 gcc_assert (target
->symtree
);
8712 tsym
= target
->symtree
->n
.sym
;
8714 sym
->attr
.asynchronous
= tsym
->attr
.asynchronous
;
8715 sym
->attr
.volatile_
= tsym
->attr
.volatile_
;
8717 sym
->attr
.target
= tsym
->attr
.target
8718 || gfc_expr_attr (target
).pointer
;
8719 if (is_subref_array (target
))
8720 sym
->attr
.subref_array_pointer
= 1;
8723 if (target
->expr_type
== EXPR_NULL
)
8725 gfc_error ("Selector at %L cannot be NULL()", &target
->where
);
8728 else if (target
->ts
.type
== BT_UNKNOWN
)
8730 gfc_error ("Selector at %L has no type", &target
->where
);
8734 /* Get type if this was not already set. Note that it can be
8735 some other type than the target in case this is a SELECT TYPE
8736 selector! So we must not update when the type is already there. */
8737 if (sym
->ts
.type
== BT_UNKNOWN
)
8738 sym
->ts
= target
->ts
;
8740 gcc_assert (sym
->ts
.type
!= BT_UNKNOWN
);
8742 /* See if this is a valid association-to-variable. */
8743 sym
->assoc
->variable
= (target
->expr_type
== EXPR_VARIABLE
8744 && !gfc_has_vector_subscript (target
));
8746 /* Finally resolve if this is an array or not. */
8747 if (sym
->attr
.dimension
&& target
->rank
== 0)
8749 /* primary.c makes the assumption that a reference to an associate
8750 name followed by a left parenthesis is an array reference. */
8751 if (sym
->ts
.type
!= BT_CHARACTER
)
8752 gfc_error ("Associate-name %qs at %L is used as array",
8753 sym
->name
, &sym
->declared_at
);
8754 sym
->attr
.dimension
= 0;
8759 /* We cannot deal with class selectors that need temporaries. */
8760 if (target
->ts
.type
== BT_CLASS
8761 && gfc_ref_needs_temporary_p (target
->ref
))
8763 gfc_error ("CLASS selector at %L needs a temporary which is not "
8764 "yet implemented", &target
->where
);
8768 if (target
->ts
.type
== BT_CLASS
)
8769 gfc_fix_class_refs (target
);
8771 if (target
->rank
!= 0)
8774 /* The rank may be incorrectly guessed at parsing, therefore make sure
8775 it is corrected now. */
8776 if (sym
->ts
.type
!= BT_CLASS
&& (!sym
->as
|| sym
->assoc
->rankguessed
))
8779 sym
->as
= gfc_get_array_spec ();
8781 as
->rank
= target
->rank
;
8782 as
->type
= AS_DEFERRED
;
8783 as
->corank
= gfc_get_corank (target
);
8784 sym
->attr
.dimension
= 1;
8785 if (as
->corank
!= 0)
8786 sym
->attr
.codimension
= 1;
8788 else if (sym
->ts
.type
== BT_CLASS
&& (!CLASS_DATA (sym
)->as
|| sym
->assoc
->rankguessed
))
8790 if (!CLASS_DATA (sym
)->as
)
8791 CLASS_DATA (sym
)->as
= gfc_get_array_spec ();
8792 as
= CLASS_DATA (sym
)->as
;
8793 as
->rank
= target
->rank
;
8794 as
->type
= AS_DEFERRED
;
8795 as
->corank
= gfc_get_corank (target
);
8796 CLASS_DATA (sym
)->attr
.dimension
= 1;
8797 if (as
->corank
!= 0)
8798 CLASS_DATA (sym
)->attr
.codimension
= 1;
8803 /* target's rank is 0, but the type of the sym is still array valued,
8804 which has to be corrected. */
8805 if (sym
->ts
.type
== BT_CLASS
8806 && CLASS_DATA (sym
) && CLASS_DATA (sym
)->as
)
8809 symbol_attribute attr
;
8810 /* The associated variable's type is still the array type
8811 correct this now. */
8812 gfc_typespec
*ts
= &target
->ts
;
8815 for (ref
= target
->ref
; ref
!= NULL
; ref
= ref
->next
)
8820 ts
= &ref
->u
.c
.component
->ts
;
8823 if (ts
->type
== BT_CLASS
)
8824 ts
= &ts
->u
.derived
->components
->ts
;
8830 /* Create a scalar instance of the current class type. Because the
8831 rank of a class array goes into its name, the type has to be
8832 rebuild. The alternative of (re-)setting just the attributes
8833 and as in the current type, destroys the type also in other
8837 sym
->ts
.type
= BT_CLASS
;
8838 attr
= CLASS_DATA (sym
)->attr
;
8840 attr
.associate_var
= 1;
8841 attr
.dimension
= attr
.codimension
= 0;
8842 attr
.class_pointer
= 1;
8843 if (!gfc_build_class_symbol (&sym
->ts
, &attr
, &as
))
8845 /* Make sure the _vptr is set. */
8846 c
= gfc_find_component (sym
->ts
.u
.derived
, "_vptr", true, true, NULL
);
8847 if (c
->ts
.u
.derived
== NULL
)
8848 c
->ts
.u
.derived
= gfc_find_derived_vtab (sym
->ts
.u
.derived
);
8849 CLASS_DATA (sym
)->attr
.pointer
= 1;
8850 CLASS_DATA (sym
)->attr
.class_pointer
= 1;
8851 gfc_set_sym_referenced (sym
->ts
.u
.derived
);
8852 gfc_commit_symbol (sym
->ts
.u
.derived
);
8853 /* _vptr now has the _vtab in it, change it to the _vtype. */
8854 if (c
->ts
.u
.derived
->attr
.vtab
)
8855 c
->ts
.u
.derived
= c
->ts
.u
.derived
->ts
.u
.derived
;
8856 c
->ts
.u
.derived
->ns
->types_resolved
= 0;
8857 resolve_types (c
->ts
.u
.derived
->ns
);
8861 /* Mark this as an associate variable. */
8862 sym
->attr
.associate_var
= 1;
8864 /* Fix up the type-spec for CHARACTER types. */
8865 if (sym
->ts
.type
== BT_CHARACTER
&& !sym
->attr
.select_type_temporary
)
8868 sym
->ts
.u
.cl
= target
->ts
.u
.cl
;
8870 if (sym
->ts
.deferred
&& target
->expr_type
== EXPR_VARIABLE
8871 && target
->symtree
->n
.sym
->attr
.dummy
8872 && sym
->ts
.u
.cl
== target
->ts
.u
.cl
)
8874 sym
->ts
.u
.cl
= gfc_new_charlen (sym
->ns
, NULL
);
8875 sym
->ts
.deferred
= 1;
8878 if (!sym
->ts
.u
.cl
->length
8879 && !sym
->ts
.deferred
8880 && target
->expr_type
== EXPR_CONSTANT
)
8882 sym
->ts
.u
.cl
->length
=
8883 gfc_get_int_expr (gfc_charlen_int_kind
, NULL
,
8884 target
->value
.character
.length
);
8886 else if ((!sym
->ts
.u
.cl
->length
8887 || sym
->ts
.u
.cl
->length
->expr_type
!= EXPR_CONSTANT
)
8888 && target
->expr_type
!= EXPR_VARIABLE
)
8890 sym
->ts
.u
.cl
= gfc_new_charlen (sym
->ns
, NULL
);
8891 sym
->ts
.deferred
= 1;
8893 /* This is reset in trans-stmt.c after the assignment
8894 of the target expression to the associate name. */
8895 sym
->attr
.allocatable
= 1;
8899 /* If the target is a good class object, so is the associate variable. */
8900 if (sym
->ts
.type
== BT_CLASS
&& gfc_expr_attr (target
).class_ok
)
8901 sym
->attr
.class_ok
= 1;
8905 /* Ensure that SELECT TYPE expressions have the correct rank and a full
8906 array reference, where necessary. The symbols are artificial and so
8907 the dimension attribute and arrayspec can also be set. In addition,
8908 sometimes the expr1 arrives as BT_DERIVED, when the symbol is BT_CLASS.
8909 This is corrected here as well.*/
8912 fixup_array_ref (gfc_expr
**expr1
, gfc_expr
*expr2
,
8913 int rank
, gfc_ref
*ref
)
8915 gfc_ref
*nref
= (*expr1
)->ref
;
8916 gfc_symbol
*sym1
= (*expr1
)->symtree
->n
.sym
;
8917 gfc_symbol
*sym2
= expr2
? expr2
->symtree
->n
.sym
: NULL
;
8918 (*expr1
)->rank
= rank
;
8919 if (sym1
->ts
.type
== BT_CLASS
)
8921 if ((*expr1
)->ts
.type
!= BT_CLASS
)
8922 (*expr1
)->ts
= sym1
->ts
;
8924 CLASS_DATA (sym1
)->attr
.dimension
= 1;
8925 if (CLASS_DATA (sym1
)->as
== NULL
&& sym2
)
8926 CLASS_DATA (sym1
)->as
8927 = gfc_copy_array_spec (CLASS_DATA (sym2
)->as
);
8931 sym1
->attr
.dimension
= 1;
8932 if (sym1
->as
== NULL
&& sym2
)
8933 sym1
->as
= gfc_copy_array_spec (sym2
->as
);
8936 for (; nref
; nref
= nref
->next
)
8937 if (nref
->next
== NULL
)
8940 if (ref
&& nref
&& nref
->type
!= REF_ARRAY
)
8941 nref
->next
= gfc_copy_ref (ref
);
8942 else if (ref
&& !nref
)
8943 (*expr1
)->ref
= gfc_copy_ref (ref
);
8948 build_loc_call (gfc_expr
*sym_expr
)
8951 loc_call
= gfc_get_expr ();
8952 loc_call
->expr_type
= EXPR_FUNCTION
;
8953 gfc_get_sym_tree ("_loc", gfc_current_ns
, &loc_call
->symtree
, false);
8954 loc_call
->symtree
->n
.sym
->attr
.flavor
= FL_PROCEDURE
;
8955 loc_call
->symtree
->n
.sym
->attr
.intrinsic
= 1;
8956 loc_call
->symtree
->n
.sym
->result
= loc_call
->symtree
->n
.sym
;
8957 gfc_commit_symbol (loc_call
->symtree
->n
.sym
);
8958 loc_call
->ts
.type
= BT_INTEGER
;
8959 loc_call
->ts
.kind
= gfc_index_integer_kind
;
8960 loc_call
->value
.function
.isym
= gfc_intrinsic_function_by_id (GFC_ISYM_LOC
);
8961 loc_call
->value
.function
.actual
= gfc_get_actual_arglist ();
8962 loc_call
->value
.function
.actual
->expr
= sym_expr
;
8963 loc_call
->where
= sym_expr
->where
;
8967 /* Resolve a SELECT TYPE statement. */
8970 resolve_select_type (gfc_code
*code
, gfc_namespace
*old_ns
)
8972 gfc_symbol
*selector_type
;
8973 gfc_code
*body
, *new_st
, *if_st
, *tail
;
8974 gfc_code
*class_is
= NULL
, *default_case
= NULL
;
8977 char name
[GFC_MAX_SYMBOL_LEN
];
8981 gfc_ref
* ref
= NULL
;
8982 gfc_expr
*selector_expr
= NULL
;
8984 ns
= code
->ext
.block
.ns
;
8987 /* Check for F03:C813. */
8988 if (code
->expr1
->ts
.type
!= BT_CLASS
8989 && !(code
->expr2
&& code
->expr2
->ts
.type
== BT_CLASS
))
8991 gfc_error ("Selector shall be polymorphic in SELECT TYPE statement "
8992 "at %L", &code
->loc
);
8996 if (!code
->expr1
->symtree
->n
.sym
->attr
.class_ok
)
9001 gfc_ref
*ref2
= NULL
;
9002 for (ref
= code
->expr2
->ref
; ref
!= NULL
; ref
= ref
->next
)
9003 if (ref
->type
== REF_COMPONENT
9004 && ref
->u
.c
.component
->ts
.type
== BT_CLASS
)
9009 if (code
->expr1
->symtree
->n
.sym
->attr
.untyped
)
9010 code
->expr1
->symtree
->n
.sym
->ts
= ref2
->u
.c
.component
->ts
;
9011 selector_type
= CLASS_DATA (ref2
->u
.c
.component
)->ts
.u
.derived
;
9015 if (code
->expr1
->symtree
->n
.sym
->attr
.untyped
)
9016 code
->expr1
->symtree
->n
.sym
->ts
= code
->expr2
->ts
;
9017 selector_type
= CLASS_DATA (code
->expr2
)->ts
.u
.derived
;
9020 if (code
->expr2
->rank
&& CLASS_DATA (code
->expr1
)->as
)
9021 CLASS_DATA (code
->expr1
)->as
->rank
= code
->expr2
->rank
;
9023 /* F2008: C803 The selector expression must not be coindexed. */
9024 if (gfc_is_coindexed (code
->expr2
))
9026 gfc_error ("Selector at %L must not be coindexed",
9027 &code
->expr2
->where
);
9034 selector_type
= CLASS_DATA (code
->expr1
)->ts
.u
.derived
;
9036 if (gfc_is_coindexed (code
->expr1
))
9038 gfc_error ("Selector at %L must not be coindexed",
9039 &code
->expr1
->where
);
9044 /* Loop over TYPE IS / CLASS IS cases. */
9045 for (body
= code
->block
; body
; body
= body
->block
)
9047 c
= body
->ext
.block
.case_list
;
9051 /* Check for repeated cases. */
9052 for (tail
= code
->block
; tail
; tail
= tail
->block
)
9054 gfc_case
*d
= tail
->ext
.block
.case_list
;
9058 if (c
->ts
.type
== d
->ts
.type
9059 && ((c
->ts
.type
== BT_DERIVED
9060 && c
->ts
.u
.derived
&& d
->ts
.u
.derived
9061 && !strcmp (c
->ts
.u
.derived
->name
,
9062 d
->ts
.u
.derived
->name
))
9063 || c
->ts
.type
== BT_UNKNOWN
9064 || (!(c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
9065 && c
->ts
.kind
== d
->ts
.kind
)))
9067 gfc_error ("TYPE IS at %L overlaps with TYPE IS at %L",
9068 &c
->where
, &d
->where
);
9074 /* Check F03:C815. */
9075 if ((c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
9076 && !selector_type
->attr
.unlimited_polymorphic
9077 && !gfc_type_is_extensible (c
->ts
.u
.derived
))
9079 gfc_error ("Derived type %qs at %L must be extensible",
9080 c
->ts
.u
.derived
->name
, &c
->where
);
9085 /* Check F03:C816. */
9086 if (c
->ts
.type
!= BT_UNKNOWN
&& !selector_type
->attr
.unlimited_polymorphic
9087 && ((c
->ts
.type
!= BT_DERIVED
&& c
->ts
.type
!= BT_CLASS
)
9088 || !gfc_type_is_extension_of (selector_type
, c
->ts
.u
.derived
)))
9090 if (c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
9091 gfc_error ("Derived type %qs at %L must be an extension of %qs",
9092 c
->ts
.u
.derived
->name
, &c
->where
, selector_type
->name
);
9094 gfc_error ("Unexpected intrinsic type %qs at %L",
9095 gfc_basic_typename (c
->ts
.type
), &c
->where
);
9100 /* Check F03:C814. */
9101 if (c
->ts
.type
== BT_CHARACTER
9102 && (c
->ts
.u
.cl
->length
!= NULL
|| c
->ts
.deferred
))
9104 gfc_error ("The type-spec at %L shall specify that each length "
9105 "type parameter is assumed", &c
->where
);
9110 /* Intercept the DEFAULT case. */
9111 if (c
->ts
.type
== BT_UNKNOWN
)
9113 /* Check F03:C818. */
9116 gfc_error ("The DEFAULT CASE at %L cannot be followed "
9117 "by a second DEFAULT CASE at %L",
9118 &default_case
->ext
.block
.case_list
->where
, &c
->where
);
9123 default_case
= body
;
9130 /* Transform SELECT TYPE statement to BLOCK and associate selector to
9131 target if present. If there are any EXIT statements referring to the
9132 SELECT TYPE construct, this is no problem because the gfc_code
9133 reference stays the same and EXIT is equally possible from the BLOCK
9134 it is changed to. */
9135 code
->op
= EXEC_BLOCK
;
9138 gfc_association_list
* assoc
;
9140 assoc
= gfc_get_association_list ();
9141 assoc
->st
= code
->expr1
->symtree
;
9142 assoc
->target
= gfc_copy_expr (code
->expr2
);
9143 assoc
->target
->where
= code
->expr2
->where
;
9144 /* assoc->variable will be set by resolve_assoc_var. */
9146 code
->ext
.block
.assoc
= assoc
;
9147 code
->expr1
->symtree
->n
.sym
->assoc
= assoc
;
9149 resolve_assoc_var (code
->expr1
->symtree
->n
.sym
, false);
9152 code
->ext
.block
.assoc
= NULL
;
9154 /* Ensure that the selector rank and arrayspec are available to
9155 correct expressions in which they might be missing. */
9156 if (code
->expr2
&& code
->expr2
->rank
)
9158 rank
= code
->expr2
->rank
;
9159 for (ref
= code
->expr2
->ref
; ref
; ref
= ref
->next
)
9160 if (ref
->next
== NULL
)
9162 if (ref
&& ref
->type
== REF_ARRAY
)
9163 ref
= gfc_copy_ref (ref
);
9165 /* Fixup expr1 if necessary. */
9167 fixup_array_ref (&code
->expr1
, code
->expr2
, rank
, ref
);
9169 else if (code
->expr1
->rank
)
9171 rank
= code
->expr1
->rank
;
9172 for (ref
= code
->expr1
->ref
; ref
; ref
= ref
->next
)
9173 if (ref
->next
== NULL
)
9175 if (ref
&& ref
->type
== REF_ARRAY
)
9176 ref
= gfc_copy_ref (ref
);
9179 /* Add EXEC_SELECT to switch on type. */
9180 new_st
= gfc_get_code (code
->op
);
9181 new_st
->expr1
= code
->expr1
;
9182 new_st
->expr2
= code
->expr2
;
9183 new_st
->block
= code
->block
;
9184 code
->expr1
= code
->expr2
= NULL
;
9189 ns
->code
->next
= new_st
;
9191 code
->op
= EXEC_SELECT_TYPE
;
9193 /* Use the intrinsic LOC function to generate an integer expression
9194 for the vtable of the selector. Note that the rank of the selector
9195 expression has to be set to zero. */
9196 gfc_add_vptr_component (code
->expr1
);
9197 code
->expr1
->rank
= 0;
9198 code
->expr1
= build_loc_call (code
->expr1
);
9199 selector_expr
= code
->expr1
->value
.function
.actual
->expr
;
9201 /* Loop over TYPE IS / CLASS IS cases. */
9202 for (body
= code
->block
; body
; body
= body
->block
)
9206 c
= body
->ext
.block
.case_list
;
9208 /* Generate an index integer expression for address of the
9209 TYPE/CLASS vtable and store it in c->low. The hash expression
9210 is stored in c->high and is used to resolve intrinsic cases. */
9211 if (c
->ts
.type
!= BT_UNKNOWN
)
9213 if (c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
9215 vtab
= gfc_find_derived_vtab (c
->ts
.u
.derived
);
9217 c
->high
= gfc_get_int_expr (gfc_integer_4_kind
, NULL
,
9218 c
->ts
.u
.derived
->hash_value
);
9222 vtab
= gfc_find_vtab (&c
->ts
);
9223 gcc_assert (vtab
&& CLASS_DATA (vtab
)->initializer
);
9224 e
= CLASS_DATA (vtab
)->initializer
;
9225 c
->high
= gfc_copy_expr (e
);
9226 if (c
->high
->ts
.kind
!= gfc_integer_4_kind
)
9229 ts
.kind
= gfc_integer_4_kind
;
9230 ts
.type
= BT_INTEGER
;
9231 gfc_convert_type_warn (c
->high
, &ts
, 2, 0);
9235 e
= gfc_lval_expr_from_sym (vtab
);
9236 c
->low
= build_loc_call (e
);
9241 /* Associate temporary to selector. This should only be done
9242 when this case is actually true, so build a new ASSOCIATE
9243 that does precisely this here (instead of using the
9246 if (c
->ts
.type
== BT_CLASS
)
9247 sprintf (name
, "__tmp_class_%s", c
->ts
.u
.derived
->name
);
9248 else if (c
->ts
.type
== BT_DERIVED
)
9249 sprintf (name
, "__tmp_type_%s", c
->ts
.u
.derived
->name
);
9250 else if (c
->ts
.type
== BT_CHARACTER
)
9252 HOST_WIDE_INT charlen
= 0;
9253 if (c
->ts
.u
.cl
&& c
->ts
.u
.cl
->length
9254 && c
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
)
9255 charlen
= gfc_mpz_get_hwi (c
->ts
.u
.cl
->length
->value
.integer
);
9256 snprintf (name
, sizeof (name
),
9257 "__tmp_%s_" HOST_WIDE_INT_PRINT_DEC
"_%d",
9258 gfc_basic_typename (c
->ts
.type
), charlen
, c
->ts
.kind
);
9261 sprintf (name
, "__tmp_%s_%d", gfc_basic_typename (c
->ts
.type
),
9264 st
= gfc_find_symtree (ns
->sym_root
, name
);
9265 gcc_assert (st
->n
.sym
->assoc
);
9266 st
->n
.sym
->assoc
->target
= gfc_get_variable_expr (selector_expr
->symtree
);
9267 st
->n
.sym
->assoc
->target
->where
= selector_expr
->where
;
9268 if (c
->ts
.type
!= BT_CLASS
&& c
->ts
.type
!= BT_UNKNOWN
)
9270 gfc_add_data_component (st
->n
.sym
->assoc
->target
);
9271 /* Fixup the target expression if necessary. */
9273 fixup_array_ref (&st
->n
.sym
->assoc
->target
, NULL
, rank
, ref
);
9276 new_st
= gfc_get_code (EXEC_BLOCK
);
9277 new_st
->ext
.block
.ns
= gfc_build_block_ns (ns
);
9278 new_st
->ext
.block
.ns
->code
= body
->next
;
9279 body
->next
= new_st
;
9281 /* Chain in the new list only if it is marked as dangling. Otherwise
9282 there is a CASE label overlap and this is already used. Just ignore,
9283 the error is diagnosed elsewhere. */
9284 if (st
->n
.sym
->assoc
->dangling
)
9286 new_st
->ext
.block
.assoc
= st
->n
.sym
->assoc
;
9287 st
->n
.sym
->assoc
->dangling
= 0;
9290 resolve_assoc_var (st
->n
.sym
, false);
9293 /* Take out CLASS IS cases for separate treatment. */
9295 while (body
&& body
->block
)
9297 if (body
->block
->ext
.block
.case_list
->ts
.type
== BT_CLASS
)
9299 /* Add to class_is list. */
9300 if (class_is
== NULL
)
9302 class_is
= body
->block
;
9307 for (tail
= class_is
; tail
->block
; tail
= tail
->block
) ;
9308 tail
->block
= body
->block
;
9311 /* Remove from EXEC_SELECT list. */
9312 body
->block
= body
->block
->block
;
9325 /* Add a default case to hold the CLASS IS cases. */
9326 for (tail
= code
; tail
->block
; tail
= tail
->block
) ;
9327 tail
->block
= gfc_get_code (EXEC_SELECT_TYPE
);
9329 tail
->ext
.block
.case_list
= gfc_get_case ();
9330 tail
->ext
.block
.case_list
->ts
.type
= BT_UNKNOWN
;
9332 default_case
= tail
;
9335 /* More than one CLASS IS block? */
9336 if (class_is
->block
)
9340 /* Sort CLASS IS blocks by extension level. */
9344 for (c1
= &class_is
; (*c1
) && (*c1
)->block
; c1
= &((*c1
)->block
))
9347 /* F03:C817 (check for doubles). */
9348 if ((*c1
)->ext
.block
.case_list
->ts
.u
.derived
->hash_value
9349 == c2
->ext
.block
.case_list
->ts
.u
.derived
->hash_value
)
9351 gfc_error ("Double CLASS IS block in SELECT TYPE "
9353 &c2
->ext
.block
.case_list
->where
);
9356 if ((*c1
)->ext
.block
.case_list
->ts
.u
.derived
->attr
.extension
9357 < c2
->ext
.block
.case_list
->ts
.u
.derived
->attr
.extension
)
9360 (*c1
)->block
= c2
->block
;
9370 /* Generate IF chain. */
9371 if_st
= gfc_get_code (EXEC_IF
);
9373 for (body
= class_is
; body
; body
= body
->block
)
9375 new_st
->block
= gfc_get_code (EXEC_IF
);
9376 new_st
= new_st
->block
;
9377 /* Set up IF condition: Call _gfortran_is_extension_of. */
9378 new_st
->expr1
= gfc_get_expr ();
9379 new_st
->expr1
->expr_type
= EXPR_FUNCTION
;
9380 new_st
->expr1
->ts
.type
= BT_LOGICAL
;
9381 new_st
->expr1
->ts
.kind
= 4;
9382 new_st
->expr1
->value
.function
.name
= gfc_get_string (PREFIX ("is_extension_of"));
9383 new_st
->expr1
->value
.function
.isym
= XCNEW (gfc_intrinsic_sym
);
9384 new_st
->expr1
->value
.function
.isym
->id
= GFC_ISYM_EXTENDS_TYPE_OF
;
9385 /* Set up arguments. */
9386 new_st
->expr1
->value
.function
.actual
= gfc_get_actual_arglist ();
9387 new_st
->expr1
->value
.function
.actual
->expr
= gfc_get_variable_expr (selector_expr
->symtree
);
9388 new_st
->expr1
->value
.function
.actual
->expr
->where
= code
->loc
;
9389 new_st
->expr1
->where
= code
->loc
;
9390 gfc_add_vptr_component (new_st
->expr1
->value
.function
.actual
->expr
);
9391 vtab
= gfc_find_derived_vtab (body
->ext
.block
.case_list
->ts
.u
.derived
);
9392 st
= gfc_find_symtree (vtab
->ns
->sym_root
, vtab
->name
);
9393 new_st
->expr1
->value
.function
.actual
->next
= gfc_get_actual_arglist ();
9394 new_st
->expr1
->value
.function
.actual
->next
->expr
= gfc_get_variable_expr (st
);
9395 new_st
->expr1
->value
.function
.actual
->next
->expr
->where
= code
->loc
;
9396 new_st
->next
= body
->next
;
9398 if (default_case
->next
)
9400 new_st
->block
= gfc_get_code (EXEC_IF
);
9401 new_st
= new_st
->block
;
9402 new_st
->next
= default_case
->next
;
9405 /* Replace CLASS DEFAULT code by the IF chain. */
9406 default_case
->next
= if_st
;
9409 /* Resolve the internal code. This cannot be done earlier because
9410 it requires that the sym->assoc of selectors is set already. */
9411 gfc_current_ns
= ns
;
9412 gfc_resolve_blocks (code
->block
, gfc_current_ns
);
9413 gfc_current_ns
= old_ns
;
9420 /* Resolve a transfer statement. This is making sure that:
9421 -- a derived type being transferred has only non-pointer components
9422 -- a derived type being transferred doesn't have private components, unless
9423 it's being transferred from the module where the type was defined
9424 -- we're not trying to transfer a whole assumed size array. */
9427 resolve_transfer (gfc_code
*code
)
9429 gfc_symbol
*sym
, *derived
;
9433 bool formatted
= false;
9434 gfc_dt
*dt
= code
->ext
.dt
;
9435 gfc_symbol
*dtio_sub
= NULL
;
9439 while (exp
!= NULL
&& exp
->expr_type
== EXPR_OP
9440 && exp
->value
.op
.op
== INTRINSIC_PARENTHESES
)
9441 exp
= exp
->value
.op
.op1
;
9443 if (exp
&& exp
->expr_type
== EXPR_NULL
9446 gfc_error ("Invalid context for NULL () intrinsic at %L",
9451 if (exp
== NULL
|| (exp
->expr_type
!= EXPR_VARIABLE
9452 && exp
->expr_type
!= EXPR_FUNCTION
9453 && exp
->expr_type
!= EXPR_STRUCTURE
))
9456 /* If we are reading, the variable will be changed. Note that
9457 code->ext.dt may be NULL if the TRANSFER is related to
9458 an INQUIRE statement -- but in this case, we are not reading, either. */
9459 if (dt
&& dt
->dt_io_kind
->value
.iokind
== M_READ
9460 && !gfc_check_vardef_context (exp
, false, false, false,
9464 const gfc_typespec
*ts
= exp
->expr_type
== EXPR_STRUCTURE
9465 || exp
->expr_type
== EXPR_FUNCTION
9466 ? &exp
->ts
: &exp
->symtree
->n
.sym
->ts
;
9468 /* Go to actual component transferred. */
9469 for (ref
= exp
->ref
; ref
; ref
= ref
->next
)
9470 if (ref
->type
== REF_COMPONENT
)
9471 ts
= &ref
->u
.c
.component
->ts
;
9473 if (dt
&& dt
->dt_io_kind
->value
.iokind
!= M_INQUIRE
9474 && (ts
->type
== BT_DERIVED
|| ts
->type
== BT_CLASS
))
9476 derived
= ts
->u
.derived
;
9478 /* Determine when to use the formatted DTIO procedure. */
9479 if (dt
&& (dt
->format_expr
|| dt
->format_label
))
9482 write
= dt
->dt_io_kind
->value
.iokind
== M_WRITE
9483 || dt
->dt_io_kind
->value
.iokind
== M_PRINT
;
9484 dtio_sub
= gfc_find_specific_dtio_proc (derived
, write
, formatted
);
9486 if (dtio_sub
!= NULL
&& exp
->expr_type
== EXPR_VARIABLE
)
9489 sym
= exp
->symtree
->n
.sym
->ns
->proc_name
;
9490 /* Check to see if this is a nested DTIO call, with the
9491 dummy as the io-list object. */
9492 if (sym
&& sym
== dtio_sub
&& sym
->formal
9493 && sym
->formal
->sym
== exp
->symtree
->n
.sym
9494 && exp
->ref
== NULL
)
9496 if (!sym
->attr
.recursive
)
9498 gfc_error ("DTIO %s procedure at %L must be recursive",
9499 sym
->name
, &sym
->declared_at
);
9506 if (ts
->type
== BT_CLASS
&& dtio_sub
== NULL
)
9508 gfc_error ("Data transfer element at %L cannot be polymorphic unless "
9509 "it is processed by a defined input/output procedure",
9514 if (ts
->type
== BT_DERIVED
)
9516 /* Check that transferred derived type doesn't contain POINTER
9517 components unless it is processed by a defined input/output
9519 if (ts
->u
.derived
->attr
.pointer_comp
&& dtio_sub
== NULL
)
9521 gfc_error ("Data transfer element at %L cannot have POINTER "
9522 "components unless it is processed by a defined "
9523 "input/output procedure", &code
->loc
);
9528 if (ts
->u
.derived
->attr
.proc_pointer_comp
)
9530 gfc_error ("Data transfer element at %L cannot have "
9531 "procedure pointer components", &code
->loc
);
9535 if (ts
->u
.derived
->attr
.alloc_comp
&& dtio_sub
== NULL
)
9537 gfc_error ("Data transfer element at %L cannot have ALLOCATABLE "
9538 "components unless it is processed by a defined "
9539 "input/output procedure", &code
->loc
);
9543 /* C_PTR and C_FUNPTR have private components which means they cannot
9544 be printed. However, if -std=gnu and not -pedantic, allow
9545 the component to be printed to help debugging. */
9546 if (ts
->u
.derived
->ts
.f90_type
== BT_VOID
)
9548 if (!gfc_notify_std (GFC_STD_GNU
, "Data transfer element at %L "
9549 "cannot have PRIVATE components", &code
->loc
))
9552 else if (derived_inaccessible (ts
->u
.derived
) && dtio_sub
== NULL
)
9554 gfc_error ("Data transfer element at %L cannot have "
9555 "PRIVATE components unless it is processed by "
9556 "a defined input/output procedure", &code
->loc
);
9561 if (exp
->expr_type
== EXPR_STRUCTURE
)
9564 sym
= exp
->symtree
->n
.sym
;
9566 if (sym
->as
!= NULL
&& sym
->as
->type
== AS_ASSUMED_SIZE
&& exp
->ref
9567 && exp
->ref
->type
== REF_ARRAY
&& exp
->ref
->u
.ar
.type
== AR_FULL
)
9569 gfc_error ("Data transfer element at %L cannot be a full reference to "
9570 "an assumed-size array", &code
->loc
);
9574 if (async_io_dt
&& exp
->expr_type
== EXPR_VARIABLE
)
9575 exp
->symtree
->n
.sym
->attr
.asynchronous
= 1;
9579 /*********** Toplevel code resolution subroutines ***********/
9581 /* Find the set of labels that are reachable from this block. We also
9582 record the last statement in each block. */
9585 find_reachable_labels (gfc_code
*block
)
9592 cs_base
->reachable_labels
= bitmap_alloc (&labels_obstack
);
9594 /* Collect labels in this block. We don't keep those corresponding
9595 to END {IF|SELECT}, these are checked in resolve_branch by going
9596 up through the code_stack. */
9597 for (c
= block
; c
; c
= c
->next
)
9599 if (c
->here
&& c
->op
!= EXEC_END_NESTED_BLOCK
)
9600 bitmap_set_bit (cs_base
->reachable_labels
, c
->here
->value
);
9603 /* Merge with labels from parent block. */
9606 gcc_assert (cs_base
->prev
->reachable_labels
);
9607 bitmap_ior_into (cs_base
->reachable_labels
,
9608 cs_base
->prev
->reachable_labels
);
9614 resolve_lock_unlock_event (gfc_code
*code
)
9616 if (code
->expr1
->expr_type
== EXPR_FUNCTION
9617 && code
->expr1
->value
.function
.isym
9618 && code
->expr1
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
)
9619 remove_caf_get_intrinsic (code
->expr1
);
9621 if ((code
->op
== EXEC_LOCK
|| code
->op
== EXEC_UNLOCK
)
9622 && (code
->expr1
->ts
.type
!= BT_DERIVED
9623 || code
->expr1
->expr_type
!= EXPR_VARIABLE
9624 || code
->expr1
->ts
.u
.derived
->from_intmod
!= INTMOD_ISO_FORTRAN_ENV
9625 || code
->expr1
->ts
.u
.derived
->intmod_sym_id
!= ISOFORTRAN_LOCK_TYPE
9626 || code
->expr1
->rank
!= 0
9627 || (!gfc_is_coarray (code
->expr1
) &&
9628 !gfc_is_coindexed (code
->expr1
))))
9629 gfc_error ("Lock variable at %L must be a scalar of type LOCK_TYPE",
9630 &code
->expr1
->where
);
9631 else if ((code
->op
== EXEC_EVENT_POST
|| code
->op
== EXEC_EVENT_WAIT
)
9632 && (code
->expr1
->ts
.type
!= BT_DERIVED
9633 || code
->expr1
->expr_type
!= EXPR_VARIABLE
9634 || code
->expr1
->ts
.u
.derived
->from_intmod
9635 != INTMOD_ISO_FORTRAN_ENV
9636 || code
->expr1
->ts
.u
.derived
->intmod_sym_id
9637 != ISOFORTRAN_EVENT_TYPE
9638 || code
->expr1
->rank
!= 0))
9639 gfc_error ("Event variable at %L must be a scalar of type EVENT_TYPE",
9640 &code
->expr1
->where
);
9641 else if (code
->op
== EXEC_EVENT_POST
&& !gfc_is_coarray (code
->expr1
)
9642 && !gfc_is_coindexed (code
->expr1
))
9643 gfc_error ("Event variable argument at %L must be a coarray or coindexed",
9644 &code
->expr1
->where
);
9645 else if (code
->op
== EXEC_EVENT_WAIT
&& !gfc_is_coarray (code
->expr1
))
9646 gfc_error ("Event variable argument at %L must be a coarray but not "
9647 "coindexed", &code
->expr1
->where
);
9651 && (code
->expr2
->ts
.type
!= BT_INTEGER
|| code
->expr2
->rank
!= 0
9652 || code
->expr2
->expr_type
!= EXPR_VARIABLE
))
9653 gfc_error ("STAT= argument at %L must be a scalar INTEGER variable",
9654 &code
->expr2
->where
);
9657 && !gfc_check_vardef_context (code
->expr2
, false, false, false,
9658 _("STAT variable")))
9663 && (code
->expr3
->ts
.type
!= BT_CHARACTER
|| code
->expr3
->rank
!= 0
9664 || code
->expr3
->expr_type
!= EXPR_VARIABLE
))
9665 gfc_error ("ERRMSG= argument at %L must be a scalar CHARACTER variable",
9666 &code
->expr3
->where
);
9669 && !gfc_check_vardef_context (code
->expr3
, false, false, false,
9670 _("ERRMSG variable")))
9673 /* Check for LOCK the ACQUIRED_LOCK. */
9674 if (code
->op
!= EXEC_EVENT_WAIT
&& code
->expr4
9675 && (code
->expr4
->ts
.type
!= BT_LOGICAL
|| code
->expr4
->rank
!= 0
9676 || code
->expr4
->expr_type
!= EXPR_VARIABLE
))
9677 gfc_error ("ACQUIRED_LOCK= argument at %L must be a scalar LOGICAL "
9678 "variable", &code
->expr4
->where
);
9680 if (code
->op
!= EXEC_EVENT_WAIT
&& code
->expr4
9681 && !gfc_check_vardef_context (code
->expr4
, false, false, false,
9682 _("ACQUIRED_LOCK variable")))
9685 /* Check for EVENT WAIT the UNTIL_COUNT. */
9686 if (code
->op
== EXEC_EVENT_WAIT
&& code
->expr4
)
9688 if (!gfc_resolve_expr (code
->expr4
) || code
->expr4
->ts
.type
!= BT_INTEGER
9689 || code
->expr4
->rank
!= 0)
9690 gfc_error ("UNTIL_COUNT= argument at %L must be a scalar INTEGER "
9691 "expression", &code
->expr4
->where
);
9697 resolve_critical (gfc_code
*code
)
9699 gfc_symtree
*symtree
;
9700 gfc_symbol
*lock_type
;
9701 char name
[GFC_MAX_SYMBOL_LEN
];
9702 static int serial
= 0;
9704 if (flag_coarray
!= GFC_FCOARRAY_LIB
)
9707 symtree
= gfc_find_symtree (gfc_current_ns
->sym_root
,
9708 GFC_PREFIX ("lock_type"));
9710 lock_type
= symtree
->n
.sym
;
9713 if (gfc_get_sym_tree (GFC_PREFIX ("lock_type"), gfc_current_ns
, &symtree
,
9716 lock_type
= symtree
->n
.sym
;
9717 lock_type
->attr
.flavor
= FL_DERIVED
;
9718 lock_type
->attr
.zero_comp
= 1;
9719 lock_type
->from_intmod
= INTMOD_ISO_FORTRAN_ENV
;
9720 lock_type
->intmod_sym_id
= ISOFORTRAN_LOCK_TYPE
;
9723 sprintf(name
, GFC_PREFIX ("lock_var") "%d",serial
++);
9724 if (gfc_get_sym_tree (name
, gfc_current_ns
, &symtree
, false) != 0)
9727 code
->resolved_sym
= symtree
->n
.sym
;
9728 symtree
->n
.sym
->attr
.flavor
= FL_VARIABLE
;
9729 symtree
->n
.sym
->attr
.referenced
= 1;
9730 symtree
->n
.sym
->attr
.artificial
= 1;
9731 symtree
->n
.sym
->attr
.codimension
= 1;
9732 symtree
->n
.sym
->ts
.type
= BT_DERIVED
;
9733 symtree
->n
.sym
->ts
.u
.derived
= lock_type
;
9734 symtree
->n
.sym
->as
= gfc_get_array_spec ();
9735 symtree
->n
.sym
->as
->corank
= 1;
9736 symtree
->n
.sym
->as
->type
= AS_EXPLICIT
;
9737 symtree
->n
.sym
->as
->cotype
= AS_EXPLICIT
;
9738 symtree
->n
.sym
->as
->lower
[0] = gfc_get_int_expr (gfc_default_integer_kind
,
9740 gfc_commit_symbols();
9745 resolve_sync (gfc_code
*code
)
9747 /* Check imageset. The * case matches expr1 == NULL. */
9750 if (code
->expr1
->ts
.type
!= BT_INTEGER
|| code
->expr1
->rank
> 1)
9751 gfc_error ("Imageset argument at %L must be a scalar or rank-1 "
9752 "INTEGER expression", &code
->expr1
->where
);
9753 if (code
->expr1
->expr_type
== EXPR_CONSTANT
&& code
->expr1
->rank
== 0
9754 && mpz_cmp_si (code
->expr1
->value
.integer
, 1) < 0)
9755 gfc_error ("Imageset argument at %L must between 1 and num_images()",
9756 &code
->expr1
->where
);
9757 else if (code
->expr1
->expr_type
== EXPR_ARRAY
9758 && gfc_simplify_expr (code
->expr1
, 0))
9760 gfc_constructor
*cons
;
9761 cons
= gfc_constructor_first (code
->expr1
->value
.constructor
);
9762 for (; cons
; cons
= gfc_constructor_next (cons
))
9763 if (cons
->expr
->expr_type
== EXPR_CONSTANT
9764 && mpz_cmp_si (cons
->expr
->value
.integer
, 1) < 0)
9765 gfc_error ("Imageset argument at %L must between 1 and "
9766 "num_images()", &cons
->expr
->where
);
9771 gfc_resolve_expr (code
->expr2
);
9773 && (code
->expr2
->ts
.type
!= BT_INTEGER
|| code
->expr2
->rank
!= 0
9774 || code
->expr2
->expr_type
!= EXPR_VARIABLE
))
9775 gfc_error ("STAT= argument at %L must be a scalar INTEGER variable",
9776 &code
->expr2
->where
);
9779 gfc_resolve_expr (code
->expr3
);
9781 && (code
->expr3
->ts
.type
!= BT_CHARACTER
|| code
->expr3
->rank
!= 0
9782 || code
->expr3
->expr_type
!= EXPR_VARIABLE
))
9783 gfc_error ("ERRMSG= argument at %L must be a scalar CHARACTER variable",
9784 &code
->expr3
->where
);
9788 /* Given a branch to a label, see if the branch is conforming.
9789 The code node describes where the branch is located. */
9792 resolve_branch (gfc_st_label
*label
, gfc_code
*code
)
9799 /* Step one: is this a valid branching target? */
9801 if (label
->defined
== ST_LABEL_UNKNOWN
)
9803 gfc_error ("Label %d referenced at %L is never defined", label
->value
,
9808 if (label
->defined
!= ST_LABEL_TARGET
&& label
->defined
!= ST_LABEL_DO_TARGET
)
9810 gfc_error ("Statement at %L is not a valid branch target statement "
9811 "for the branch statement at %L", &label
->where
, &code
->loc
);
9815 /* Step two: make sure this branch is not a branch to itself ;-) */
9817 if (code
->here
== label
)
9820 "Branch at %L may result in an infinite loop", &code
->loc
);
9824 /* Step three: See if the label is in the same block as the
9825 branching statement. The hard work has been done by setting up
9826 the bitmap reachable_labels. */
9828 if (bitmap_bit_p (cs_base
->reachable_labels
, label
->value
))
9830 /* Check now whether there is a CRITICAL construct; if so, check
9831 whether the label is still visible outside of the CRITICAL block,
9832 which is invalid. */
9833 for (stack
= cs_base
; stack
; stack
= stack
->prev
)
9835 if (stack
->current
->op
== EXEC_CRITICAL
9836 && bitmap_bit_p (stack
->reachable_labels
, label
->value
))
9837 gfc_error ("GOTO statement at %L leaves CRITICAL construct for "
9838 "label at %L", &code
->loc
, &label
->where
);
9839 else if (stack
->current
->op
== EXEC_DO_CONCURRENT
9840 && bitmap_bit_p (stack
->reachable_labels
, label
->value
))
9841 gfc_error ("GOTO statement at %L leaves DO CONCURRENT construct "
9842 "for label at %L", &code
->loc
, &label
->where
);
9848 /* Step four: If we haven't found the label in the bitmap, it may
9849 still be the label of the END of the enclosing block, in which
9850 case we find it by going up the code_stack. */
9852 for (stack
= cs_base
; stack
; stack
= stack
->prev
)
9854 if (stack
->current
->next
&& stack
->current
->next
->here
== label
)
9856 if (stack
->current
->op
== EXEC_CRITICAL
)
9858 /* Note: A label at END CRITICAL does not leave the CRITICAL
9859 construct as END CRITICAL is still part of it. */
9860 gfc_error ("GOTO statement at %L leaves CRITICAL construct for label"
9861 " at %L", &code
->loc
, &label
->where
);
9864 else if (stack
->current
->op
== EXEC_DO_CONCURRENT
)
9866 gfc_error ("GOTO statement at %L leaves DO CONCURRENT construct for "
9867 "label at %L", &code
->loc
, &label
->where
);
9874 gcc_assert (stack
->current
->next
->op
== EXEC_END_NESTED_BLOCK
);
9878 /* The label is not in an enclosing block, so illegal. This was
9879 allowed in Fortran 66, so we allow it as extension. No
9880 further checks are necessary in this case. */
9881 gfc_notify_std (GFC_STD_LEGACY
, "Label at %L is not in the same block "
9882 "as the GOTO statement at %L", &label
->where
,
9888 /* Check whether EXPR1 has the same shape as EXPR2. */
9891 resolve_where_shape (gfc_expr
*expr1
, gfc_expr
*expr2
)
9893 mpz_t shape
[GFC_MAX_DIMENSIONS
];
9894 mpz_t shape2
[GFC_MAX_DIMENSIONS
];
9895 bool result
= false;
9898 /* Compare the rank. */
9899 if (expr1
->rank
!= expr2
->rank
)
9902 /* Compare the size of each dimension. */
9903 for (i
=0; i
<expr1
->rank
; i
++)
9905 if (!gfc_array_dimen_size (expr1
, i
, &shape
[i
]))
9908 if (!gfc_array_dimen_size (expr2
, i
, &shape2
[i
]))
9911 if (mpz_cmp (shape
[i
], shape2
[i
]))
9915 /* When either of the two expression is an assumed size array, we
9916 ignore the comparison of dimension sizes. */
9921 gfc_clear_shape (shape
, i
);
9922 gfc_clear_shape (shape2
, i
);
9927 /* Check whether a WHERE assignment target or a WHERE mask expression
9928 has the same shape as the outmost WHERE mask expression. */
9931 resolve_where (gfc_code
*code
, gfc_expr
*mask
)
9937 cblock
= code
->block
;
9939 /* Store the first WHERE mask-expr of the WHERE statement or construct.
9940 In case of nested WHERE, only the outmost one is stored. */
9941 if (mask
== NULL
) /* outmost WHERE */
9943 else /* inner WHERE */
9950 /* Check if the mask-expr has a consistent shape with the
9951 outmost WHERE mask-expr. */
9952 if (!resolve_where_shape (cblock
->expr1
, e
))
9953 gfc_error ("WHERE mask at %L has inconsistent shape",
9954 &cblock
->expr1
->where
);
9957 /* the assignment statement of a WHERE statement, or the first
9958 statement in where-body-construct of a WHERE construct */
9959 cnext
= cblock
->next
;
9964 /* WHERE assignment statement */
9967 /* Check shape consistent for WHERE assignment target. */
9968 if (e
&& !resolve_where_shape (cnext
->expr1
, e
))
9969 gfc_error ("WHERE assignment target at %L has "
9970 "inconsistent shape", &cnext
->expr1
->where
);
9974 case EXEC_ASSIGN_CALL
:
9975 resolve_call (cnext
);
9976 if (!cnext
->resolved_sym
->attr
.elemental
)
9977 gfc_error("Non-ELEMENTAL user-defined assignment in WHERE at %L",
9978 &cnext
->ext
.actual
->expr
->where
);
9981 /* WHERE or WHERE construct is part of a where-body-construct */
9983 resolve_where (cnext
, e
);
9987 gfc_error ("Unsupported statement inside WHERE at %L",
9990 /* the next statement within the same where-body-construct */
9991 cnext
= cnext
->next
;
9993 /* the next masked-elsewhere-stmt, elsewhere-stmt, or end-where-stmt */
9994 cblock
= cblock
->block
;
9999 /* Resolve assignment in FORALL construct.
10000 NVAR is the number of FORALL index variables, and VAR_EXPR records the
10001 FORALL index variables. */
10004 gfc_resolve_assign_in_forall (gfc_code
*code
, int nvar
, gfc_expr
**var_expr
)
10008 for (n
= 0; n
< nvar
; n
++)
10010 gfc_symbol
*forall_index
;
10012 forall_index
= var_expr
[n
]->symtree
->n
.sym
;
10014 /* Check whether the assignment target is one of the FORALL index
10016 if ((code
->expr1
->expr_type
== EXPR_VARIABLE
)
10017 && (code
->expr1
->symtree
->n
.sym
== forall_index
))
10018 gfc_error ("Assignment to a FORALL index variable at %L",
10019 &code
->expr1
->where
);
10022 /* If one of the FORALL index variables doesn't appear in the
10023 assignment variable, then there could be a many-to-one
10024 assignment. Emit a warning rather than an error because the
10025 mask could be resolving this problem. */
10026 if (!find_forall_index (code
->expr1
, forall_index
, 0))
10027 gfc_warning (0, "The FORALL with index %qs is not used on the "
10028 "left side of the assignment at %L and so might "
10029 "cause multiple assignment to this object",
10030 var_expr
[n
]->symtree
->name
, &code
->expr1
->where
);
10036 /* Resolve WHERE statement in FORALL construct. */
10039 gfc_resolve_where_code_in_forall (gfc_code
*code
, int nvar
,
10040 gfc_expr
**var_expr
)
10045 cblock
= code
->block
;
10048 /* the assignment statement of a WHERE statement, or the first
10049 statement in where-body-construct of a WHERE construct */
10050 cnext
= cblock
->next
;
10055 /* WHERE assignment statement */
10057 gfc_resolve_assign_in_forall (cnext
, nvar
, var_expr
);
10060 /* WHERE operator assignment statement */
10061 case EXEC_ASSIGN_CALL
:
10062 resolve_call (cnext
);
10063 if (!cnext
->resolved_sym
->attr
.elemental
)
10064 gfc_error("Non-ELEMENTAL user-defined assignment in WHERE at %L",
10065 &cnext
->ext
.actual
->expr
->where
);
10068 /* WHERE or WHERE construct is part of a where-body-construct */
10070 gfc_resolve_where_code_in_forall (cnext
, nvar
, var_expr
);
10074 gfc_error ("Unsupported statement inside WHERE at %L",
10077 /* the next statement within the same where-body-construct */
10078 cnext
= cnext
->next
;
10080 /* the next masked-elsewhere-stmt, elsewhere-stmt, or end-where-stmt */
10081 cblock
= cblock
->block
;
10086 /* Traverse the FORALL body to check whether the following errors exist:
10087 1. For assignment, check if a many-to-one assignment happens.
10088 2. For WHERE statement, check the WHERE body to see if there is any
10089 many-to-one assignment. */
10092 gfc_resolve_forall_body (gfc_code
*code
, int nvar
, gfc_expr
**var_expr
)
10096 c
= code
->block
->next
;
10102 case EXEC_POINTER_ASSIGN
:
10103 gfc_resolve_assign_in_forall (c
, nvar
, var_expr
);
10106 case EXEC_ASSIGN_CALL
:
10110 /* Because the gfc_resolve_blocks() will handle the nested FORALL,
10111 there is no need to handle it here. */
10115 gfc_resolve_where_code_in_forall(c
, nvar
, var_expr
);
10120 /* The next statement in the FORALL body. */
10126 /* Counts the number of iterators needed inside a forall construct, including
10127 nested forall constructs. This is used to allocate the needed memory
10128 in gfc_resolve_forall. */
10131 gfc_count_forall_iterators (gfc_code
*code
)
10133 int max_iters
, sub_iters
, current_iters
;
10134 gfc_forall_iterator
*fa
;
10136 gcc_assert(code
->op
== EXEC_FORALL
);
10140 for (fa
= code
->ext
.forall_iterator
; fa
; fa
= fa
->next
)
10143 code
= code
->block
->next
;
10147 if (code
->op
== EXEC_FORALL
)
10149 sub_iters
= gfc_count_forall_iterators (code
);
10150 if (sub_iters
> max_iters
)
10151 max_iters
= sub_iters
;
10156 return current_iters
+ max_iters
;
10160 /* Given a FORALL construct, first resolve the FORALL iterator, then call
10161 gfc_resolve_forall_body to resolve the FORALL body. */
10164 gfc_resolve_forall (gfc_code
*code
, gfc_namespace
*ns
, int forall_save
)
10166 static gfc_expr
**var_expr
;
10167 static int total_var
= 0;
10168 static int nvar
= 0;
10169 int i
, old_nvar
, tmp
;
10170 gfc_forall_iterator
*fa
;
10174 if (!gfc_notify_std (GFC_STD_F2018_OBS
, "FORALL construct at %L", &code
->loc
))
10177 /* Start to resolve a FORALL construct */
10178 if (forall_save
== 0)
10180 /* Count the total number of FORALL indices in the nested FORALL
10181 construct in order to allocate the VAR_EXPR with proper size. */
10182 total_var
= gfc_count_forall_iterators (code
);
10184 /* Allocate VAR_EXPR with NUMBER_OF_FORALL_INDEX elements. */
10185 var_expr
= XCNEWVEC (gfc_expr
*, total_var
);
10188 /* The information about FORALL iterator, including FORALL indices start, end
10189 and stride. An outer FORALL indice cannot appear in start, end or stride. */
10190 for (fa
= code
->ext
.forall_iterator
; fa
; fa
= fa
->next
)
10192 /* Fortran 20008: C738 (R753). */
10193 if (fa
->var
->ref
&& fa
->var
->ref
->type
== REF_ARRAY
)
10195 gfc_error ("FORALL index-name at %L must be a scalar variable "
10196 "of type integer", &fa
->var
->where
);
10200 /* Check if any outer FORALL index name is the same as the current
10202 for (i
= 0; i
< nvar
; i
++)
10204 if (fa
->var
->symtree
->n
.sym
== var_expr
[i
]->symtree
->n
.sym
)
10205 gfc_error ("An outer FORALL construct already has an index "
10206 "with this name %L", &fa
->var
->where
);
10209 /* Record the current FORALL index. */
10210 var_expr
[nvar
] = gfc_copy_expr (fa
->var
);
10214 /* No memory leak. */
10215 gcc_assert (nvar
<= total_var
);
10218 /* Resolve the FORALL body. */
10219 gfc_resolve_forall_body (code
, nvar
, var_expr
);
10221 /* May call gfc_resolve_forall to resolve the inner FORALL loop. */
10222 gfc_resolve_blocks (code
->block
, ns
);
10226 /* Free only the VAR_EXPRs allocated in this frame. */
10227 for (i
= nvar
; i
< tmp
; i
++)
10228 gfc_free_expr (var_expr
[i
]);
10232 /* We are in the outermost FORALL construct. */
10233 gcc_assert (forall_save
== 0);
10235 /* VAR_EXPR is not needed any more. */
10242 /* Resolve a BLOCK construct statement. */
10245 resolve_block_construct (gfc_code
* code
)
10247 /* Resolve the BLOCK's namespace. */
10248 gfc_resolve (code
->ext
.block
.ns
);
10250 /* For an ASSOCIATE block, the associations (and their targets) are already
10251 resolved during resolve_symbol. */
10255 /* Resolve lists of blocks found in IF, SELECT CASE, WHERE, FORALL, GOTO and
10259 gfc_resolve_blocks (gfc_code
*b
, gfc_namespace
*ns
)
10263 for (; b
; b
= b
->block
)
10265 t
= gfc_resolve_expr (b
->expr1
);
10266 if (!gfc_resolve_expr (b
->expr2
))
10272 if (t
&& b
->expr1
!= NULL
10273 && (b
->expr1
->ts
.type
!= BT_LOGICAL
|| b
->expr1
->rank
!= 0))
10274 gfc_error ("IF clause at %L requires a scalar LOGICAL expression",
10280 && b
->expr1
!= NULL
10281 && (b
->expr1
->ts
.type
!= BT_LOGICAL
|| b
->expr1
->rank
== 0))
10282 gfc_error ("WHERE/ELSEWHERE clause at %L requires a LOGICAL array",
10287 resolve_branch (b
->label1
, b
);
10291 resolve_block_construct (b
);
10295 case EXEC_SELECT_TYPE
:
10298 case EXEC_DO_WHILE
:
10299 case EXEC_DO_CONCURRENT
:
10300 case EXEC_CRITICAL
:
10303 case EXEC_IOLENGTH
:
10307 case EXEC_OMP_ATOMIC
:
10308 case EXEC_OACC_ATOMIC
:
10310 gfc_omp_atomic_op aop
10311 = (gfc_omp_atomic_op
) (b
->ext
.omp_atomic
& GFC_OMP_ATOMIC_MASK
);
10313 /* Verify this before calling gfc_resolve_code, which might
10315 gcc_assert (b
->next
&& b
->next
->op
== EXEC_ASSIGN
);
10316 gcc_assert (((aop
!= GFC_OMP_ATOMIC_CAPTURE
)
10317 && b
->next
->next
== NULL
)
10318 || ((aop
== GFC_OMP_ATOMIC_CAPTURE
)
10319 && b
->next
->next
!= NULL
10320 && b
->next
->next
->op
== EXEC_ASSIGN
10321 && b
->next
->next
->next
== NULL
));
10325 case EXEC_OACC_PARALLEL_LOOP
:
10326 case EXEC_OACC_PARALLEL
:
10327 case EXEC_OACC_KERNELS_LOOP
:
10328 case EXEC_OACC_KERNELS
:
10329 case EXEC_OACC_DATA
:
10330 case EXEC_OACC_HOST_DATA
:
10331 case EXEC_OACC_LOOP
:
10332 case EXEC_OACC_UPDATE
:
10333 case EXEC_OACC_WAIT
:
10334 case EXEC_OACC_CACHE
:
10335 case EXEC_OACC_ENTER_DATA
:
10336 case EXEC_OACC_EXIT_DATA
:
10337 case EXEC_OACC_ROUTINE
:
10338 case EXEC_OMP_CRITICAL
:
10339 case EXEC_OMP_DISTRIBUTE
:
10340 case EXEC_OMP_DISTRIBUTE_PARALLEL_DO
:
10341 case EXEC_OMP_DISTRIBUTE_PARALLEL_DO_SIMD
:
10342 case EXEC_OMP_DISTRIBUTE_SIMD
:
10344 case EXEC_OMP_DO_SIMD
:
10345 case EXEC_OMP_MASTER
:
10346 case EXEC_OMP_ORDERED
:
10347 case EXEC_OMP_PARALLEL
:
10348 case EXEC_OMP_PARALLEL_DO
:
10349 case EXEC_OMP_PARALLEL_DO_SIMD
:
10350 case EXEC_OMP_PARALLEL_SECTIONS
:
10351 case EXEC_OMP_PARALLEL_WORKSHARE
:
10352 case EXEC_OMP_SECTIONS
:
10353 case EXEC_OMP_SIMD
:
10354 case EXEC_OMP_SINGLE
:
10355 case EXEC_OMP_TARGET
:
10356 case EXEC_OMP_TARGET_DATA
:
10357 case EXEC_OMP_TARGET_ENTER_DATA
:
10358 case EXEC_OMP_TARGET_EXIT_DATA
:
10359 case EXEC_OMP_TARGET_PARALLEL
:
10360 case EXEC_OMP_TARGET_PARALLEL_DO
:
10361 case EXEC_OMP_TARGET_PARALLEL_DO_SIMD
:
10362 case EXEC_OMP_TARGET_SIMD
:
10363 case EXEC_OMP_TARGET_TEAMS
:
10364 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE
:
10365 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO
:
10366 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
10367 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_SIMD
:
10368 case EXEC_OMP_TARGET_UPDATE
:
10369 case EXEC_OMP_TASK
:
10370 case EXEC_OMP_TASKGROUP
:
10371 case EXEC_OMP_TASKLOOP
:
10372 case EXEC_OMP_TASKLOOP_SIMD
:
10373 case EXEC_OMP_TASKWAIT
:
10374 case EXEC_OMP_TASKYIELD
:
10375 case EXEC_OMP_TEAMS
:
10376 case EXEC_OMP_TEAMS_DISTRIBUTE
:
10377 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO
:
10378 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
10379 case EXEC_OMP_TEAMS_DISTRIBUTE_SIMD
:
10380 case EXEC_OMP_WORKSHARE
:
10384 gfc_internal_error ("gfc_resolve_blocks(): Bad block type");
10387 gfc_resolve_code (b
->next
, ns
);
10392 /* Does everything to resolve an ordinary assignment. Returns true
10393 if this is an interface assignment. */
10395 resolve_ordinary_assign (gfc_code
*code
, gfc_namespace
*ns
)
10402 symbol_attribute attr
;
10404 if (gfc_extend_assign (code
, ns
))
10408 if (code
->op
== EXEC_ASSIGN_CALL
)
10410 lhs
= code
->ext
.actual
->expr
;
10411 rhsptr
= &code
->ext
.actual
->next
->expr
;
10415 gfc_actual_arglist
* args
;
10416 gfc_typebound_proc
* tbp
;
10418 gcc_assert (code
->op
== EXEC_COMPCALL
);
10420 args
= code
->expr1
->value
.compcall
.actual
;
10422 rhsptr
= &args
->next
->expr
;
10424 tbp
= code
->expr1
->value
.compcall
.tbp
;
10425 gcc_assert (!tbp
->is_generic
);
10428 /* Make a temporary rhs when there is a default initializer
10429 and rhs is the same symbol as the lhs. */
10430 if ((*rhsptr
)->expr_type
== EXPR_VARIABLE
10431 && (*rhsptr
)->symtree
->n
.sym
->ts
.type
== BT_DERIVED
10432 && gfc_has_default_initializer ((*rhsptr
)->symtree
->n
.sym
->ts
.u
.derived
)
10433 && (lhs
->symtree
->n
.sym
== (*rhsptr
)->symtree
->n
.sym
))
10434 *rhsptr
= gfc_get_parentheses (*rhsptr
);
10443 && !gfc_notify_std (GFC_STD_GNU
, "BOZ literal at %L outside "
10444 "a DATA statement and outside INT/REAL/DBLE/CMPLX",
10448 /* Handle the case of a BOZ literal on the RHS. */
10449 if (rhs
->is_boz
&& lhs
->ts
.type
!= BT_INTEGER
)
10452 if (warn_surprising
)
10453 gfc_warning (OPT_Wsurprising
,
10454 "BOZ literal at %L is bitwise transferred "
10455 "non-integer symbol %qs", &code
->loc
,
10456 lhs
->symtree
->n
.sym
->name
);
10458 if (!gfc_convert_boz (rhs
, &lhs
->ts
))
10460 if ((rc
= gfc_range_check (rhs
)) != ARITH_OK
)
10462 if (rc
== ARITH_UNDERFLOW
)
10463 gfc_error ("Arithmetic underflow of bit-wise transferred BOZ at %L"
10464 ". This check can be disabled with the option "
10465 "%<-fno-range-check%>", &rhs
->where
);
10466 else if (rc
== ARITH_OVERFLOW
)
10467 gfc_error ("Arithmetic overflow of bit-wise transferred BOZ at %L"
10468 ". This check can be disabled with the option "
10469 "%<-fno-range-check%>", &rhs
->where
);
10470 else if (rc
== ARITH_NAN
)
10471 gfc_error ("Arithmetic NaN of bit-wise transferred BOZ at %L"
10472 ". This check can be disabled with the option "
10473 "%<-fno-range-check%>", &rhs
->where
);
10478 if (lhs
->ts
.type
== BT_CHARACTER
10479 && warn_character_truncation
)
10481 HOST_WIDE_INT llen
= 0, rlen
= 0;
10482 if (lhs
->ts
.u
.cl
!= NULL
10483 && lhs
->ts
.u
.cl
->length
!= NULL
10484 && lhs
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
)
10485 llen
= gfc_mpz_get_hwi (lhs
->ts
.u
.cl
->length
->value
.integer
);
10487 if (rhs
->expr_type
== EXPR_CONSTANT
)
10488 rlen
= rhs
->value
.character
.length
;
10490 else if (rhs
->ts
.u
.cl
!= NULL
10491 && rhs
->ts
.u
.cl
->length
!= NULL
10492 && rhs
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
)
10493 rlen
= gfc_mpz_get_hwi (rhs
->ts
.u
.cl
->length
->value
.integer
);
10495 if (rlen
&& llen
&& rlen
> llen
)
10496 gfc_warning_now (OPT_Wcharacter_truncation
,
10497 "CHARACTER expression will be truncated "
10498 "in assignment (%ld/%ld) at %L",
10499 (long) llen
, (long) rlen
, &code
->loc
);
10502 /* Ensure that a vector index expression for the lvalue is evaluated
10503 to a temporary if the lvalue symbol is referenced in it. */
10506 for (ref
= lhs
->ref
; ref
; ref
= ref
->next
)
10507 if (ref
->type
== REF_ARRAY
)
10509 for (n
= 0; n
< ref
->u
.ar
.dimen
; n
++)
10510 if (ref
->u
.ar
.dimen_type
[n
] == DIMEN_VECTOR
10511 && gfc_find_sym_in_expr (lhs
->symtree
->n
.sym
,
10512 ref
->u
.ar
.start
[n
]))
10514 = gfc_get_parentheses (ref
->u
.ar
.start
[n
]);
10518 if (gfc_pure (NULL
))
10520 if (lhs
->ts
.type
== BT_DERIVED
10521 && lhs
->expr_type
== EXPR_VARIABLE
10522 && lhs
->ts
.u
.derived
->attr
.pointer_comp
10523 && rhs
->expr_type
== EXPR_VARIABLE
10524 && (gfc_impure_variable (rhs
->symtree
->n
.sym
)
10525 || gfc_is_coindexed (rhs
)))
10527 /* F2008, C1283. */
10528 if (gfc_is_coindexed (rhs
))
10529 gfc_error ("Coindexed expression at %L is assigned to "
10530 "a derived type variable with a POINTER "
10531 "component in a PURE procedure",
10534 gfc_error ("The impure variable at %L is assigned to "
10535 "a derived type variable with a POINTER "
10536 "component in a PURE procedure (12.6)",
10541 /* Fortran 2008, C1283. */
10542 if (gfc_is_coindexed (lhs
))
10544 gfc_error ("Assignment to coindexed variable at %L in a PURE "
10545 "procedure", &rhs
->where
);
10550 if (gfc_implicit_pure (NULL
))
10552 if (lhs
->expr_type
== EXPR_VARIABLE
10553 && lhs
->symtree
->n
.sym
!= gfc_current_ns
->proc_name
10554 && lhs
->symtree
->n
.sym
->ns
!= gfc_current_ns
)
10555 gfc_unset_implicit_pure (NULL
);
10557 if (lhs
->ts
.type
== BT_DERIVED
10558 && lhs
->expr_type
== EXPR_VARIABLE
10559 && lhs
->ts
.u
.derived
->attr
.pointer_comp
10560 && rhs
->expr_type
== EXPR_VARIABLE
10561 && (gfc_impure_variable (rhs
->symtree
->n
.sym
)
10562 || gfc_is_coindexed (rhs
)))
10563 gfc_unset_implicit_pure (NULL
);
10565 /* Fortran 2008, C1283. */
10566 if (gfc_is_coindexed (lhs
))
10567 gfc_unset_implicit_pure (NULL
);
10570 /* F2008, 7.2.1.2. */
10571 attr
= gfc_expr_attr (lhs
);
10572 if (lhs
->ts
.type
== BT_CLASS
&& attr
.allocatable
)
10574 if (attr
.codimension
)
10576 gfc_error ("Assignment to polymorphic coarray at %L is not "
10577 "permitted", &lhs
->where
);
10580 if (!gfc_notify_std (GFC_STD_F2008
, "Assignment to an allocatable "
10581 "polymorphic variable at %L", &lhs
->where
))
10583 if (!flag_realloc_lhs
)
10585 gfc_error ("Assignment to an allocatable polymorphic variable at %L "
10586 "requires %<-frealloc-lhs%>", &lhs
->where
);
10590 else if (lhs
->ts
.type
== BT_CLASS
)
10592 gfc_error ("Nonallocatable variable must not be polymorphic in intrinsic "
10593 "assignment at %L - check that there is a matching specific "
10594 "subroutine for '=' operator", &lhs
->where
);
10598 bool lhs_coindexed
= gfc_is_coindexed (lhs
);
10600 /* F2008, Section 7.2.1.2. */
10601 if (lhs_coindexed
&& gfc_has_ultimate_allocatable (lhs
))
10603 gfc_error ("Coindexed variable must not have an allocatable ultimate "
10604 "component in assignment at %L", &lhs
->where
);
10608 /* Assign the 'data' of a class object to a derived type. */
10609 if (lhs
->ts
.type
== BT_DERIVED
10610 && rhs
->ts
.type
== BT_CLASS
10611 && rhs
->expr_type
!= EXPR_ARRAY
)
10612 gfc_add_data_component (rhs
);
10614 /* Make sure there is a vtable and, in particular, a _copy for the
10616 if (UNLIMITED_POLY (lhs
) && lhs
->rank
&& rhs
->ts
.type
!= BT_CLASS
)
10617 gfc_find_vtab (&rhs
->ts
);
10619 bool caf_convert_to_send
= flag_coarray
== GFC_FCOARRAY_LIB
10621 || (code
->expr2
->expr_type
== EXPR_FUNCTION
10622 && code
->expr2
->value
.function
.isym
10623 && code
->expr2
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
10624 && (code
->expr1
->rank
== 0 || code
->expr2
->rank
!= 0)
10625 && !gfc_expr_attr (rhs
).allocatable
10626 && !gfc_has_vector_subscript (rhs
)));
10628 gfc_check_assign (lhs
, rhs
, 1, !caf_convert_to_send
);
10630 /* Insert a GFC_ISYM_CAF_SEND intrinsic, when the LHS is a coindexed variable.
10631 Additionally, insert this code when the RHS is a CAF as we then use the
10632 GFC_ISYM_CAF_SEND intrinsic just to avoid a temporary; but do not do so if
10633 the LHS is (re)allocatable or has a vector subscript. If the LHS is a
10634 noncoindexed array and the RHS is a coindexed scalar, use the normal code
10636 if (caf_convert_to_send
)
10638 if (code
->expr2
->expr_type
== EXPR_FUNCTION
10639 && code
->expr2
->value
.function
.isym
10640 && code
->expr2
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
)
10641 remove_caf_get_intrinsic (code
->expr2
);
10642 code
->op
= EXEC_CALL
;
10643 gfc_get_sym_tree (GFC_PREFIX ("caf_send"), ns
, &code
->symtree
, true);
10644 code
->resolved_sym
= code
->symtree
->n
.sym
;
10645 code
->resolved_sym
->attr
.flavor
= FL_PROCEDURE
;
10646 code
->resolved_sym
->attr
.intrinsic
= 1;
10647 code
->resolved_sym
->attr
.subroutine
= 1;
10648 code
->resolved_isym
= gfc_intrinsic_subroutine_by_id (GFC_ISYM_CAF_SEND
);
10649 gfc_commit_symbol (code
->resolved_sym
);
10650 code
->ext
.actual
= gfc_get_actual_arglist ();
10651 code
->ext
.actual
->expr
= lhs
;
10652 code
->ext
.actual
->next
= gfc_get_actual_arglist ();
10653 code
->ext
.actual
->next
->expr
= rhs
;
10654 code
->expr1
= NULL
;
10655 code
->expr2
= NULL
;
10662 /* Add a component reference onto an expression. */
10665 add_comp_ref (gfc_expr
*e
, gfc_component
*c
)
10670 ref
= &((*ref
)->next
);
10671 *ref
= gfc_get_ref ();
10672 (*ref
)->type
= REF_COMPONENT
;
10673 (*ref
)->u
.c
.sym
= e
->ts
.u
.derived
;
10674 (*ref
)->u
.c
.component
= c
;
10677 /* Add a full array ref, as necessary. */
10680 gfc_add_full_array_ref (e
, c
->as
);
10681 e
->rank
= c
->as
->rank
;
10686 /* Build an assignment. Keep the argument 'op' for future use, so that
10687 pointer assignments can be made. */
10690 build_assignment (gfc_exec_op op
, gfc_expr
*expr1
, gfc_expr
*expr2
,
10691 gfc_component
*comp1
, gfc_component
*comp2
, locus loc
)
10693 gfc_code
*this_code
;
10695 this_code
= gfc_get_code (op
);
10696 this_code
->next
= NULL
;
10697 this_code
->expr1
= gfc_copy_expr (expr1
);
10698 this_code
->expr2
= gfc_copy_expr (expr2
);
10699 this_code
->loc
= loc
;
10700 if (comp1
&& comp2
)
10702 add_comp_ref (this_code
->expr1
, comp1
);
10703 add_comp_ref (this_code
->expr2
, comp2
);
10710 /* Makes a temporary variable expression based on the characteristics of
10711 a given variable expression. */
10714 get_temp_from_expr (gfc_expr
*e
, gfc_namespace
*ns
)
10716 static int serial
= 0;
10717 char name
[GFC_MAX_SYMBOL_LEN
];
10719 gfc_array_spec
*as
;
10720 gfc_array_ref
*aref
;
10723 sprintf (name
, GFC_PREFIX("DA%d"), serial
++);
10724 gfc_get_sym_tree (name
, ns
, &tmp
, false);
10725 gfc_add_type (tmp
->n
.sym
, &e
->ts
, NULL
);
10727 if (e
->expr_type
== EXPR_CONSTANT
&& e
->ts
.type
== BT_CHARACTER
)
10728 tmp
->n
.sym
->ts
.u
.cl
->length
= gfc_get_int_expr (gfc_charlen_int_kind
,
10730 e
->value
.character
.length
);
10736 /* Obtain the arrayspec for the temporary. */
10737 if (e
->rank
&& e
->expr_type
!= EXPR_ARRAY
10738 && e
->expr_type
!= EXPR_FUNCTION
10739 && e
->expr_type
!= EXPR_OP
)
10741 aref
= gfc_find_array_ref (e
);
10742 if (e
->expr_type
== EXPR_VARIABLE
10743 && e
->symtree
->n
.sym
->as
== aref
->as
)
10747 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
10748 if (ref
->type
== REF_COMPONENT
10749 && ref
->u
.c
.component
->as
== aref
->as
)
10757 /* Add the attributes and the arrayspec to the temporary. */
10758 tmp
->n
.sym
->attr
= gfc_expr_attr (e
);
10759 tmp
->n
.sym
->attr
.function
= 0;
10760 tmp
->n
.sym
->attr
.result
= 0;
10761 tmp
->n
.sym
->attr
.flavor
= FL_VARIABLE
;
10762 tmp
->n
.sym
->attr
.dummy
= 0;
10763 tmp
->n
.sym
->attr
.intent
= INTENT_UNKNOWN
;
10767 tmp
->n
.sym
->as
= gfc_copy_array_spec (as
);
10770 if (as
->type
== AS_DEFERRED
)
10771 tmp
->n
.sym
->attr
.allocatable
= 1;
10773 else if (e
->rank
&& (e
->expr_type
== EXPR_ARRAY
10774 || e
->expr_type
== EXPR_FUNCTION
10775 || e
->expr_type
== EXPR_OP
))
10777 tmp
->n
.sym
->as
= gfc_get_array_spec ();
10778 tmp
->n
.sym
->as
->type
= AS_DEFERRED
;
10779 tmp
->n
.sym
->as
->rank
= e
->rank
;
10780 tmp
->n
.sym
->attr
.allocatable
= 1;
10781 tmp
->n
.sym
->attr
.dimension
= 1;
10784 tmp
->n
.sym
->attr
.dimension
= 0;
10786 gfc_set_sym_referenced (tmp
->n
.sym
);
10787 gfc_commit_symbol (tmp
->n
.sym
);
10788 e
= gfc_lval_expr_from_sym (tmp
->n
.sym
);
10790 /* Should the lhs be a section, use its array ref for the
10791 temporary expression. */
10792 if (aref
&& aref
->type
!= AR_FULL
)
10794 gfc_free_ref_list (e
->ref
);
10795 e
->ref
= gfc_copy_ref (ref
);
10801 /* Add one line of code to the code chain, making sure that 'head' and
10802 'tail' are appropriately updated. */
10805 add_code_to_chain (gfc_code
**this_code
, gfc_code
**head
, gfc_code
**tail
)
10807 gcc_assert (this_code
);
10809 *head
= *tail
= *this_code
;
10811 *tail
= gfc_append_code (*tail
, *this_code
);
10816 /* Counts the potential number of part array references that would
10817 result from resolution of typebound defined assignments. */
10820 nonscalar_typebound_assign (gfc_symbol
*derived
, int depth
)
10823 int c_depth
= 0, t_depth
;
10825 for (c
= derived
->components
; c
; c
= c
->next
)
10827 if ((!gfc_bt_struct (c
->ts
.type
)
10829 || c
->attr
.allocatable
10830 || c
->attr
.proc_pointer_comp
10831 || c
->attr
.class_pointer
10832 || c
->attr
.proc_pointer
)
10833 && !c
->attr
.defined_assign_comp
)
10836 if (c
->as
&& c_depth
== 0)
10839 if (c
->ts
.u
.derived
->attr
.defined_assign_comp
)
10840 t_depth
= nonscalar_typebound_assign (c
->ts
.u
.derived
,
10845 c_depth
= t_depth
> c_depth
? t_depth
: c_depth
;
10847 return depth
+ c_depth
;
10851 /* Implement 7.2.1.3 of the F08 standard:
10852 "An intrinsic assignment where the variable is of derived type is
10853 performed as if each component of the variable were assigned from the
10854 corresponding component of expr using pointer assignment (7.2.2) for
10855 each pointer component, defined assignment for each nonpointer
10856 nonallocatable component of a type that has a type-bound defined
10857 assignment consistent with the component, intrinsic assignment for
10858 each other nonpointer nonallocatable component, ..."
10860 The pointer assignments are taken care of by the intrinsic
10861 assignment of the structure itself. This function recursively adds
10862 defined assignments where required. The recursion is accomplished
10863 by calling gfc_resolve_code.
10865 When the lhs in a defined assignment has intent INOUT, we need a
10866 temporary for the lhs. In pseudo-code:
10868 ! Only call function lhs once.
10869 if (lhs is not a constant or an variable)
10872 ! Do the intrinsic assignment
10874 ! Now do the defined assignments
10875 do over components with typebound defined assignment [%cmp]
10876 #if one component's assignment procedure is INOUT
10878 #if expr2 non-variable
10884 t1%cmp {defined=} expr2%cmp
10890 expr1%cmp {defined=} expr2%cmp
10894 /* The temporary assignments have to be put on top of the additional
10895 code to avoid the result being changed by the intrinsic assignment.
10897 static int component_assignment_level
= 0;
10898 static gfc_code
*tmp_head
= NULL
, *tmp_tail
= NULL
;
10901 generate_component_assignments (gfc_code
**code
, gfc_namespace
*ns
)
10903 gfc_component
*comp1
, *comp2
;
10904 gfc_code
*this_code
= NULL
, *head
= NULL
, *tail
= NULL
;
10906 int error_count
, depth
;
10908 gfc_get_errors (NULL
, &error_count
);
10910 /* Filter out continuing processing after an error. */
10912 || (*code
)->expr1
->ts
.type
!= BT_DERIVED
10913 || (*code
)->expr2
->ts
.type
!= BT_DERIVED
)
10916 /* TODO: Handle more than one part array reference in assignments. */
10917 depth
= nonscalar_typebound_assign ((*code
)->expr1
->ts
.u
.derived
,
10918 (*code
)->expr1
->rank
? 1 : 0);
10921 gfc_warning (0, "TODO: type-bound defined assignment(s) at %L not "
10922 "done because multiple part array references would "
10923 "occur in intermediate expressions.", &(*code
)->loc
);
10927 component_assignment_level
++;
10929 /* Create a temporary so that functions get called only once. */
10930 if ((*code
)->expr2
->expr_type
!= EXPR_VARIABLE
10931 && (*code
)->expr2
->expr_type
!= EXPR_CONSTANT
)
10933 gfc_expr
*tmp_expr
;
10935 /* Assign the rhs to the temporary. */
10936 tmp_expr
= get_temp_from_expr ((*code
)->expr1
, ns
);
10937 this_code
= build_assignment (EXEC_ASSIGN
,
10938 tmp_expr
, (*code
)->expr2
,
10939 NULL
, NULL
, (*code
)->loc
);
10940 /* Add the code and substitute the rhs expression. */
10941 add_code_to_chain (&this_code
, &tmp_head
, &tmp_tail
);
10942 gfc_free_expr ((*code
)->expr2
);
10943 (*code
)->expr2
= tmp_expr
;
10946 /* Do the intrinsic assignment. This is not needed if the lhs is one
10947 of the temporaries generated here, since the intrinsic assignment
10948 to the final result already does this. */
10949 if ((*code
)->expr1
->symtree
->n
.sym
->name
[2] != '@')
10951 this_code
= build_assignment (EXEC_ASSIGN
,
10952 (*code
)->expr1
, (*code
)->expr2
,
10953 NULL
, NULL
, (*code
)->loc
);
10954 add_code_to_chain (&this_code
, &head
, &tail
);
10957 comp1
= (*code
)->expr1
->ts
.u
.derived
->components
;
10958 comp2
= (*code
)->expr2
->ts
.u
.derived
->components
;
10961 for (; comp1
; comp1
= comp1
->next
, comp2
= comp2
->next
)
10963 bool inout
= false;
10965 /* The intrinsic assignment does the right thing for pointers
10966 of all kinds and allocatable components. */
10967 if (!gfc_bt_struct (comp1
->ts
.type
)
10968 || comp1
->attr
.pointer
10969 || comp1
->attr
.allocatable
10970 || comp1
->attr
.proc_pointer_comp
10971 || comp1
->attr
.class_pointer
10972 || comp1
->attr
.proc_pointer
)
10975 /* Make an assigment for this component. */
10976 this_code
= build_assignment (EXEC_ASSIGN
,
10977 (*code
)->expr1
, (*code
)->expr2
,
10978 comp1
, comp2
, (*code
)->loc
);
10980 /* Convert the assignment if there is a defined assignment for
10981 this type. Otherwise, using the call from gfc_resolve_code,
10982 recurse into its components. */
10983 gfc_resolve_code (this_code
, ns
);
10985 if (this_code
->op
== EXEC_ASSIGN_CALL
)
10987 gfc_formal_arglist
*dummy_args
;
10989 /* Check that there is a typebound defined assignment. If not,
10990 then this must be a module defined assignment. We cannot
10991 use the defined_assign_comp attribute here because it must
10992 be this derived type that has the defined assignment and not
10994 if (!(comp1
->ts
.u
.derived
->f2k_derived
10995 && comp1
->ts
.u
.derived
->f2k_derived
10996 ->tb_op
[INTRINSIC_ASSIGN
]))
10998 gfc_free_statements (this_code
);
11003 /* If the first argument of the subroutine has intent INOUT
11004 a temporary must be generated and used instead. */
11005 rsym
= this_code
->resolved_sym
;
11006 dummy_args
= gfc_sym_get_dummy_args (rsym
);
11008 && dummy_args
->sym
->attr
.intent
== INTENT_INOUT
)
11010 gfc_code
*temp_code
;
11013 /* Build the temporary required for the assignment and put
11014 it at the head of the generated code. */
11017 t1
= get_temp_from_expr ((*code
)->expr1
, ns
);
11018 temp_code
= build_assignment (EXEC_ASSIGN
,
11019 t1
, (*code
)->expr1
,
11020 NULL
, NULL
, (*code
)->loc
);
11022 /* For allocatable LHS, check whether it is allocated. Note
11023 that allocatable components with defined assignment are
11024 not yet support. See PR 57696. */
11025 if ((*code
)->expr1
->symtree
->n
.sym
->attr
.allocatable
)
11029 gfc_lval_expr_from_sym ((*code
)->expr1
->symtree
->n
.sym
);
11030 block
= gfc_get_code (EXEC_IF
);
11031 block
->block
= gfc_get_code (EXEC_IF
);
11032 block
->block
->expr1
11033 = gfc_build_intrinsic_call (ns
,
11034 GFC_ISYM_ALLOCATED
, "allocated",
11035 (*code
)->loc
, 1, e
);
11036 block
->block
->next
= temp_code
;
11039 add_code_to_chain (&temp_code
, &tmp_head
, &tmp_tail
);
11042 /* Replace the first actual arg with the component of the
11044 gfc_free_expr (this_code
->ext
.actual
->expr
);
11045 this_code
->ext
.actual
->expr
= gfc_copy_expr (t1
);
11046 add_comp_ref (this_code
->ext
.actual
->expr
, comp1
);
11048 /* If the LHS variable is allocatable and wasn't allocated and
11049 the temporary is allocatable, pointer assign the address of
11050 the freshly allocated LHS to the temporary. */
11051 if ((*code
)->expr1
->symtree
->n
.sym
->attr
.allocatable
11052 && gfc_expr_attr ((*code
)->expr1
).allocatable
)
11057 cond
= gfc_get_expr ();
11058 cond
->ts
.type
= BT_LOGICAL
;
11059 cond
->ts
.kind
= gfc_default_logical_kind
;
11060 cond
->expr_type
= EXPR_OP
;
11061 cond
->where
= (*code
)->loc
;
11062 cond
->value
.op
.op
= INTRINSIC_NOT
;
11063 cond
->value
.op
.op1
= gfc_build_intrinsic_call (ns
,
11064 GFC_ISYM_ALLOCATED
, "allocated",
11065 (*code
)->loc
, 1, gfc_copy_expr (t1
));
11066 block
= gfc_get_code (EXEC_IF
);
11067 block
->block
= gfc_get_code (EXEC_IF
);
11068 block
->block
->expr1
= cond
;
11069 block
->block
->next
= build_assignment (EXEC_POINTER_ASSIGN
,
11070 t1
, (*code
)->expr1
,
11071 NULL
, NULL
, (*code
)->loc
);
11072 add_code_to_chain (&block
, &head
, &tail
);
11076 else if (this_code
->op
== EXEC_ASSIGN
&& !this_code
->next
)
11078 /* Don't add intrinsic assignments since they are already
11079 effected by the intrinsic assignment of the structure. */
11080 gfc_free_statements (this_code
);
11085 add_code_to_chain (&this_code
, &head
, &tail
);
11089 /* Transfer the value to the final result. */
11090 this_code
= build_assignment (EXEC_ASSIGN
,
11091 (*code
)->expr1
, t1
,
11092 comp1
, comp2
, (*code
)->loc
);
11093 add_code_to_chain (&this_code
, &head
, &tail
);
11097 /* Put the temporary assignments at the top of the generated code. */
11098 if (tmp_head
&& component_assignment_level
== 1)
11100 gfc_append_code (tmp_head
, head
);
11102 tmp_head
= tmp_tail
= NULL
;
11105 // If we did a pointer assignment - thus, we need to ensure that the LHS is
11106 // not accidentally deallocated. Hence, nullify t1.
11107 if (t1
&& (*code
)->expr1
->symtree
->n
.sym
->attr
.allocatable
11108 && gfc_expr_attr ((*code
)->expr1
).allocatable
)
11114 e
= gfc_lval_expr_from_sym ((*code
)->expr1
->symtree
->n
.sym
);
11115 cond
= gfc_build_intrinsic_call (ns
, GFC_ISYM_ASSOCIATED
, "associated",
11116 (*code
)->loc
, 2, gfc_copy_expr (t1
), e
);
11117 block
= gfc_get_code (EXEC_IF
);
11118 block
->block
= gfc_get_code (EXEC_IF
);
11119 block
->block
->expr1
= cond
;
11120 block
->block
->next
= build_assignment (EXEC_POINTER_ASSIGN
,
11121 t1
, gfc_get_null_expr (&(*code
)->loc
),
11122 NULL
, NULL
, (*code
)->loc
);
11123 gfc_append_code (tail
, block
);
11127 /* Now attach the remaining code chain to the input code. Step on
11128 to the end of the new code since resolution is complete. */
11129 gcc_assert ((*code
)->op
== EXEC_ASSIGN
);
11130 tail
->next
= (*code
)->next
;
11131 /* Overwrite 'code' because this would place the intrinsic assignment
11132 before the temporary for the lhs is created. */
11133 gfc_free_expr ((*code
)->expr1
);
11134 gfc_free_expr ((*code
)->expr2
);
11140 component_assignment_level
--;
11144 /* F2008: Pointer function assignments are of the form:
11145 ptr_fcn (args) = expr
11146 This function breaks these assignments into two statements:
11147 temporary_pointer => ptr_fcn(args)
11148 temporary_pointer = expr */
11151 resolve_ptr_fcn_assign (gfc_code
**code
, gfc_namespace
*ns
)
11153 gfc_expr
*tmp_ptr_expr
;
11154 gfc_code
*this_code
;
11155 gfc_component
*comp
;
11158 if ((*code
)->expr1
->expr_type
!= EXPR_FUNCTION
)
11161 /* Even if standard does not support this feature, continue to build
11162 the two statements to avoid upsetting frontend_passes.c. */
11163 gfc_notify_std (GFC_STD_F2008
, "Pointer procedure assignment at "
11164 "%L", &(*code
)->loc
);
11166 comp
= gfc_get_proc_ptr_comp ((*code
)->expr1
);
11169 s
= comp
->ts
.interface
;
11171 s
= (*code
)->expr1
->symtree
->n
.sym
;
11173 if (s
== NULL
|| !s
->result
->attr
.pointer
)
11175 gfc_error ("The function result on the lhs of the assignment at "
11176 "%L must have the pointer attribute.",
11177 &(*code
)->expr1
->where
);
11178 (*code
)->op
= EXEC_NOP
;
11182 tmp_ptr_expr
= get_temp_from_expr ((*code
)->expr2
, ns
);
11184 /* get_temp_from_expression is set up for ordinary assignments. To that
11185 end, where array bounds are not known, arrays are made allocatable.
11186 Change the temporary to a pointer here. */
11187 tmp_ptr_expr
->symtree
->n
.sym
->attr
.pointer
= 1;
11188 tmp_ptr_expr
->symtree
->n
.sym
->attr
.allocatable
= 0;
11189 tmp_ptr_expr
->where
= (*code
)->loc
;
11191 this_code
= build_assignment (EXEC_ASSIGN
,
11192 tmp_ptr_expr
, (*code
)->expr2
,
11193 NULL
, NULL
, (*code
)->loc
);
11194 this_code
->next
= (*code
)->next
;
11195 (*code
)->next
= this_code
;
11196 (*code
)->op
= EXEC_POINTER_ASSIGN
;
11197 (*code
)->expr2
= (*code
)->expr1
;
11198 (*code
)->expr1
= tmp_ptr_expr
;
11204 /* Deferred character length assignments from an operator expression
11205 require a temporary because the character length of the lhs can
11206 change in the course of the assignment. */
11209 deferred_op_assign (gfc_code
**code
, gfc_namespace
*ns
)
11211 gfc_expr
*tmp_expr
;
11212 gfc_code
*this_code
;
11214 if (!((*code
)->expr1
->ts
.type
== BT_CHARACTER
11215 && (*code
)->expr1
->ts
.deferred
&& (*code
)->expr1
->rank
11216 && (*code
)->expr2
->expr_type
== EXPR_OP
))
11219 if (!gfc_check_dependency ((*code
)->expr1
, (*code
)->expr2
, 1))
11222 if (gfc_expr_attr ((*code
)->expr1
).pointer
)
11225 tmp_expr
= get_temp_from_expr ((*code
)->expr1
, ns
);
11226 tmp_expr
->where
= (*code
)->loc
;
11228 /* A new charlen is required to ensure that the variable string
11229 length is different to that of the original lhs. */
11230 tmp_expr
->ts
.u
.cl
= gfc_get_charlen();
11231 tmp_expr
->symtree
->n
.sym
->ts
.u
.cl
= tmp_expr
->ts
.u
.cl
;
11232 tmp_expr
->ts
.u
.cl
->next
= (*code
)->expr2
->ts
.u
.cl
->next
;
11233 (*code
)->expr2
->ts
.u
.cl
->next
= tmp_expr
->ts
.u
.cl
;
11235 tmp_expr
->symtree
->n
.sym
->ts
.deferred
= 1;
11237 this_code
= build_assignment (EXEC_ASSIGN
,
11239 gfc_copy_expr (tmp_expr
),
11240 NULL
, NULL
, (*code
)->loc
);
11242 (*code
)->expr1
= tmp_expr
;
11244 this_code
->next
= (*code
)->next
;
11245 (*code
)->next
= this_code
;
11251 /* Given a block of code, recursively resolve everything pointed to by this
11255 gfc_resolve_code (gfc_code
*code
, gfc_namespace
*ns
)
11257 int omp_workshare_save
;
11258 int forall_save
, do_concurrent_save
;
11262 frame
.prev
= cs_base
;
11266 find_reachable_labels (code
);
11268 for (; code
; code
= code
->next
)
11270 frame
.current
= code
;
11271 forall_save
= forall_flag
;
11272 do_concurrent_save
= gfc_do_concurrent_flag
;
11274 if (code
->op
== EXEC_FORALL
)
11277 gfc_resolve_forall (code
, ns
, forall_save
);
11280 else if (code
->block
)
11282 omp_workshare_save
= -1;
11285 case EXEC_OACC_PARALLEL_LOOP
:
11286 case EXEC_OACC_PARALLEL
:
11287 case EXEC_OACC_KERNELS_LOOP
:
11288 case EXEC_OACC_KERNELS
:
11289 case EXEC_OACC_DATA
:
11290 case EXEC_OACC_HOST_DATA
:
11291 case EXEC_OACC_LOOP
:
11292 gfc_resolve_oacc_blocks (code
, ns
);
11294 case EXEC_OMP_PARALLEL_WORKSHARE
:
11295 omp_workshare_save
= omp_workshare_flag
;
11296 omp_workshare_flag
= 1;
11297 gfc_resolve_omp_parallel_blocks (code
, ns
);
11299 case EXEC_OMP_PARALLEL
:
11300 case EXEC_OMP_PARALLEL_DO
:
11301 case EXEC_OMP_PARALLEL_DO_SIMD
:
11302 case EXEC_OMP_PARALLEL_SECTIONS
:
11303 case EXEC_OMP_TARGET_PARALLEL
:
11304 case EXEC_OMP_TARGET_PARALLEL_DO
:
11305 case EXEC_OMP_TARGET_PARALLEL_DO_SIMD
:
11306 case EXEC_OMP_TARGET_TEAMS
:
11307 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE
:
11308 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO
:
11309 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
11310 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_SIMD
:
11311 case EXEC_OMP_TASK
:
11312 case EXEC_OMP_TASKLOOP
:
11313 case EXEC_OMP_TASKLOOP_SIMD
:
11314 case EXEC_OMP_TEAMS
:
11315 case EXEC_OMP_TEAMS_DISTRIBUTE
:
11316 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO
:
11317 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
11318 case EXEC_OMP_TEAMS_DISTRIBUTE_SIMD
:
11319 omp_workshare_save
= omp_workshare_flag
;
11320 omp_workshare_flag
= 0;
11321 gfc_resolve_omp_parallel_blocks (code
, ns
);
11323 case EXEC_OMP_DISTRIBUTE
:
11324 case EXEC_OMP_DISTRIBUTE_SIMD
:
11326 case EXEC_OMP_DO_SIMD
:
11327 case EXEC_OMP_SIMD
:
11328 case EXEC_OMP_TARGET_SIMD
:
11329 gfc_resolve_omp_do_blocks (code
, ns
);
11331 case EXEC_SELECT_TYPE
:
11332 /* Blocks are handled in resolve_select_type because we have
11333 to transform the SELECT TYPE into ASSOCIATE first. */
11335 case EXEC_DO_CONCURRENT
:
11336 gfc_do_concurrent_flag
= 1;
11337 gfc_resolve_blocks (code
->block
, ns
);
11338 gfc_do_concurrent_flag
= 2;
11340 case EXEC_OMP_WORKSHARE
:
11341 omp_workshare_save
= omp_workshare_flag
;
11342 omp_workshare_flag
= 1;
11345 gfc_resolve_blocks (code
->block
, ns
);
11349 if (omp_workshare_save
!= -1)
11350 omp_workshare_flag
= omp_workshare_save
;
11354 if (code
->op
!= EXEC_COMPCALL
&& code
->op
!= EXEC_CALL_PPC
)
11355 t
= gfc_resolve_expr (code
->expr1
);
11356 forall_flag
= forall_save
;
11357 gfc_do_concurrent_flag
= do_concurrent_save
;
11359 if (!gfc_resolve_expr (code
->expr2
))
11362 if (code
->op
== EXEC_ALLOCATE
11363 && !gfc_resolve_expr (code
->expr3
))
11369 case EXEC_END_BLOCK
:
11370 case EXEC_END_NESTED_BLOCK
:
11374 case EXEC_ERROR_STOP
:
11376 case EXEC_CONTINUE
:
11378 case EXEC_ASSIGN_CALL
:
11381 case EXEC_CRITICAL
:
11382 resolve_critical (code
);
11385 case EXEC_SYNC_ALL
:
11386 case EXEC_SYNC_IMAGES
:
11387 case EXEC_SYNC_MEMORY
:
11388 resolve_sync (code
);
11393 case EXEC_EVENT_POST
:
11394 case EXEC_EVENT_WAIT
:
11395 resolve_lock_unlock_event (code
);
11398 case EXEC_FAIL_IMAGE
:
11399 case EXEC_FORM_TEAM
:
11400 case EXEC_CHANGE_TEAM
:
11401 case EXEC_END_TEAM
:
11402 case EXEC_SYNC_TEAM
:
11406 /* Keep track of which entry we are up to. */
11407 current_entry_id
= code
->ext
.entry
->id
;
11411 resolve_where (code
, NULL
);
11415 if (code
->expr1
!= NULL
)
11417 if (code
->expr1
->ts
.type
!= BT_INTEGER
)
11418 gfc_error ("ASSIGNED GOTO statement at %L requires an "
11419 "INTEGER variable", &code
->expr1
->where
);
11420 else if (code
->expr1
->symtree
->n
.sym
->attr
.assign
!= 1)
11421 gfc_error ("Variable %qs has not been assigned a target "
11422 "label at %L", code
->expr1
->symtree
->n
.sym
->name
,
11423 &code
->expr1
->where
);
11426 resolve_branch (code
->label1
, code
);
11430 if (code
->expr1
!= NULL
11431 && (code
->expr1
->ts
.type
!= BT_INTEGER
|| code
->expr1
->rank
))
11432 gfc_error ("Alternate RETURN statement at %L requires a SCALAR-"
11433 "INTEGER return specifier", &code
->expr1
->where
);
11436 case EXEC_INIT_ASSIGN
:
11437 case EXEC_END_PROCEDURE
:
11444 /* Remove a GFC_ISYM_CAF_GET inserted for a coindexed variable on
11446 if (code
->expr1
->expr_type
== EXPR_FUNCTION
11447 && code
->expr1
->value
.function
.isym
11448 && code
->expr1
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
)
11449 remove_caf_get_intrinsic (code
->expr1
);
11451 /* If this is a pointer function in an lvalue variable context,
11452 the new code will have to be resolved afresh. This is also the
11453 case with an error, where the code is transformed into NOP to
11454 prevent ICEs downstream. */
11455 if (resolve_ptr_fcn_assign (&code
, ns
)
11456 || code
->op
== EXEC_NOP
)
11459 if (!gfc_check_vardef_context (code
->expr1
, false, false, false,
11463 if (resolve_ordinary_assign (code
, ns
))
11465 if (code
->op
== EXEC_COMPCALL
)
11471 /* Check for dependencies in deferred character length array
11472 assignments and generate a temporary, if necessary. */
11473 if (code
->op
== EXEC_ASSIGN
&& deferred_op_assign (&code
, ns
))
11476 /* F03 7.4.1.3 for non-allocatable, non-pointer components. */
11477 if (code
->op
!= EXEC_CALL
&& code
->expr1
->ts
.type
== BT_DERIVED
11478 && code
->expr1
->ts
.u
.derived
11479 && code
->expr1
->ts
.u
.derived
->attr
.defined_assign_comp
)
11480 generate_component_assignments (&code
, ns
);
11484 case EXEC_LABEL_ASSIGN
:
11485 if (code
->label1
->defined
== ST_LABEL_UNKNOWN
)
11486 gfc_error ("Label %d referenced at %L is never defined",
11487 code
->label1
->value
, &code
->label1
->where
);
11489 && (code
->expr1
->expr_type
!= EXPR_VARIABLE
11490 || code
->expr1
->symtree
->n
.sym
->ts
.type
!= BT_INTEGER
11491 || code
->expr1
->symtree
->n
.sym
->ts
.kind
11492 != gfc_default_integer_kind
11493 || code
->expr1
->symtree
->n
.sym
->as
!= NULL
))
11494 gfc_error ("ASSIGN statement at %L requires a scalar "
11495 "default INTEGER variable", &code
->expr1
->where
);
11498 case EXEC_POINTER_ASSIGN
:
11505 /* This is both a variable definition and pointer assignment
11506 context, so check both of them. For rank remapping, a final
11507 array ref may be present on the LHS and fool gfc_expr_attr
11508 used in gfc_check_vardef_context. Remove it. */
11509 e
= remove_last_array_ref (code
->expr1
);
11510 t
= gfc_check_vardef_context (e
, true, false, false,
11511 _("pointer assignment"));
11513 t
= gfc_check_vardef_context (e
, false, false, false,
11514 _("pointer assignment"));
11517 t
= gfc_check_pointer_assign (code
->expr1
, code
->expr2
, !t
) && t
;
11522 /* Assigning a class object always is a regular assign. */
11523 if (code
->expr2
->ts
.type
== BT_CLASS
11524 && code
->expr1
->ts
.type
== BT_CLASS
11525 && !CLASS_DATA (code
->expr2
)->attr
.dimension
11526 && !(gfc_expr_attr (code
->expr1
).proc_pointer
11527 && code
->expr2
->expr_type
== EXPR_VARIABLE
11528 && code
->expr2
->symtree
->n
.sym
->attr
.flavor
11530 code
->op
= EXEC_ASSIGN
;
11534 case EXEC_ARITHMETIC_IF
:
11536 gfc_expr
*e
= code
->expr1
;
11538 gfc_resolve_expr (e
);
11539 if (e
->expr_type
== EXPR_NULL
)
11540 gfc_error ("Invalid NULL at %L", &e
->where
);
11542 if (t
&& (e
->rank
> 0
11543 || !(e
->ts
.type
== BT_REAL
|| e
->ts
.type
== BT_INTEGER
)))
11544 gfc_error ("Arithmetic IF statement at %L requires a scalar "
11545 "REAL or INTEGER expression", &e
->where
);
11547 resolve_branch (code
->label1
, code
);
11548 resolve_branch (code
->label2
, code
);
11549 resolve_branch (code
->label3
, code
);
11554 if (t
&& code
->expr1
!= NULL
11555 && (code
->expr1
->ts
.type
!= BT_LOGICAL
11556 || code
->expr1
->rank
!= 0))
11557 gfc_error ("IF clause at %L requires a scalar LOGICAL expression",
11558 &code
->expr1
->where
);
11563 resolve_call (code
);
11566 case EXEC_COMPCALL
:
11568 resolve_typebound_subroutine (code
);
11571 case EXEC_CALL_PPC
:
11572 resolve_ppc_call (code
);
11576 /* Select is complicated. Also, a SELECT construct could be
11577 a transformed computed GOTO. */
11578 resolve_select (code
, false);
11581 case EXEC_SELECT_TYPE
:
11582 resolve_select_type (code
, ns
);
11586 resolve_block_construct (code
);
11590 if (code
->ext
.iterator
!= NULL
)
11592 gfc_iterator
*iter
= code
->ext
.iterator
;
11593 if (gfc_resolve_iterator (iter
, true, false))
11594 gfc_resolve_do_iterator (code
, iter
->var
->symtree
->n
.sym
,
11599 case EXEC_DO_WHILE
:
11600 if (code
->expr1
== NULL
)
11601 gfc_internal_error ("gfc_resolve_code(): No expression on "
11604 && (code
->expr1
->rank
!= 0
11605 || code
->expr1
->ts
.type
!= BT_LOGICAL
))
11606 gfc_error ("Exit condition of DO WHILE loop at %L must be "
11607 "a scalar LOGICAL expression", &code
->expr1
->where
);
11610 case EXEC_ALLOCATE
:
11612 resolve_allocate_deallocate (code
, "ALLOCATE");
11616 case EXEC_DEALLOCATE
:
11618 resolve_allocate_deallocate (code
, "DEALLOCATE");
11623 if (!gfc_resolve_open (code
->ext
.open
))
11626 resolve_branch (code
->ext
.open
->err
, code
);
11630 if (!gfc_resolve_close (code
->ext
.close
))
11633 resolve_branch (code
->ext
.close
->err
, code
);
11636 case EXEC_BACKSPACE
:
11640 if (!gfc_resolve_filepos (code
->ext
.filepos
, &code
->loc
))
11643 resolve_branch (code
->ext
.filepos
->err
, code
);
11647 if (!gfc_resolve_inquire (code
->ext
.inquire
))
11650 resolve_branch (code
->ext
.inquire
->err
, code
);
11653 case EXEC_IOLENGTH
:
11654 gcc_assert (code
->ext
.inquire
!= NULL
);
11655 if (!gfc_resolve_inquire (code
->ext
.inquire
))
11658 resolve_branch (code
->ext
.inquire
->err
, code
);
11662 if (!gfc_resolve_wait (code
->ext
.wait
))
11665 resolve_branch (code
->ext
.wait
->err
, code
);
11666 resolve_branch (code
->ext
.wait
->end
, code
);
11667 resolve_branch (code
->ext
.wait
->eor
, code
);
11672 if (!gfc_resolve_dt (code
->ext
.dt
, &code
->loc
))
11675 resolve_branch (code
->ext
.dt
->err
, code
);
11676 resolve_branch (code
->ext
.dt
->end
, code
);
11677 resolve_branch (code
->ext
.dt
->eor
, code
);
11680 case EXEC_TRANSFER
:
11681 resolve_transfer (code
);
11684 case EXEC_DO_CONCURRENT
:
11686 resolve_forall_iterators (code
->ext
.forall_iterator
);
11688 if (code
->expr1
!= NULL
11689 && (code
->expr1
->ts
.type
!= BT_LOGICAL
|| code
->expr1
->rank
))
11690 gfc_error ("FORALL mask clause at %L requires a scalar LOGICAL "
11691 "expression", &code
->expr1
->where
);
11694 case EXEC_OACC_PARALLEL_LOOP
:
11695 case EXEC_OACC_PARALLEL
:
11696 case EXEC_OACC_KERNELS_LOOP
:
11697 case EXEC_OACC_KERNELS
:
11698 case EXEC_OACC_DATA
:
11699 case EXEC_OACC_HOST_DATA
:
11700 case EXEC_OACC_LOOP
:
11701 case EXEC_OACC_UPDATE
:
11702 case EXEC_OACC_WAIT
:
11703 case EXEC_OACC_CACHE
:
11704 case EXEC_OACC_ENTER_DATA
:
11705 case EXEC_OACC_EXIT_DATA
:
11706 case EXEC_OACC_ATOMIC
:
11707 case EXEC_OACC_DECLARE
:
11708 gfc_resolve_oacc_directive (code
, ns
);
11711 case EXEC_OMP_ATOMIC
:
11712 case EXEC_OMP_BARRIER
:
11713 case EXEC_OMP_CANCEL
:
11714 case EXEC_OMP_CANCELLATION_POINT
:
11715 case EXEC_OMP_CRITICAL
:
11716 case EXEC_OMP_FLUSH
:
11717 case EXEC_OMP_DISTRIBUTE
:
11718 case EXEC_OMP_DISTRIBUTE_PARALLEL_DO
:
11719 case EXEC_OMP_DISTRIBUTE_PARALLEL_DO_SIMD
:
11720 case EXEC_OMP_DISTRIBUTE_SIMD
:
11722 case EXEC_OMP_DO_SIMD
:
11723 case EXEC_OMP_MASTER
:
11724 case EXEC_OMP_ORDERED
:
11725 case EXEC_OMP_SECTIONS
:
11726 case EXEC_OMP_SIMD
:
11727 case EXEC_OMP_SINGLE
:
11728 case EXEC_OMP_TARGET
:
11729 case EXEC_OMP_TARGET_DATA
:
11730 case EXEC_OMP_TARGET_ENTER_DATA
:
11731 case EXEC_OMP_TARGET_EXIT_DATA
:
11732 case EXEC_OMP_TARGET_PARALLEL
:
11733 case EXEC_OMP_TARGET_PARALLEL_DO
:
11734 case EXEC_OMP_TARGET_PARALLEL_DO_SIMD
:
11735 case EXEC_OMP_TARGET_SIMD
:
11736 case EXEC_OMP_TARGET_TEAMS
:
11737 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE
:
11738 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO
:
11739 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
11740 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_SIMD
:
11741 case EXEC_OMP_TARGET_UPDATE
:
11742 case EXEC_OMP_TASK
:
11743 case EXEC_OMP_TASKGROUP
:
11744 case EXEC_OMP_TASKLOOP
:
11745 case EXEC_OMP_TASKLOOP_SIMD
:
11746 case EXEC_OMP_TASKWAIT
:
11747 case EXEC_OMP_TASKYIELD
:
11748 case EXEC_OMP_TEAMS
:
11749 case EXEC_OMP_TEAMS_DISTRIBUTE
:
11750 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO
:
11751 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
11752 case EXEC_OMP_TEAMS_DISTRIBUTE_SIMD
:
11753 case EXEC_OMP_WORKSHARE
:
11754 gfc_resolve_omp_directive (code
, ns
);
11757 case EXEC_OMP_PARALLEL
:
11758 case EXEC_OMP_PARALLEL_DO
:
11759 case EXEC_OMP_PARALLEL_DO_SIMD
:
11760 case EXEC_OMP_PARALLEL_SECTIONS
:
11761 case EXEC_OMP_PARALLEL_WORKSHARE
:
11762 omp_workshare_save
= omp_workshare_flag
;
11763 omp_workshare_flag
= 0;
11764 gfc_resolve_omp_directive (code
, ns
);
11765 omp_workshare_flag
= omp_workshare_save
;
11769 gfc_internal_error ("gfc_resolve_code(): Bad statement code");
11773 cs_base
= frame
.prev
;
11777 /* Resolve initial values and make sure they are compatible with
11781 resolve_values (gfc_symbol
*sym
)
11785 if (sym
->value
== NULL
)
11788 if (sym
->value
->expr_type
== EXPR_STRUCTURE
)
11789 t
= resolve_structure_cons (sym
->value
, 1);
11791 t
= gfc_resolve_expr (sym
->value
);
11796 gfc_check_assign_symbol (sym
, NULL
, sym
->value
);
11800 /* Verify any BIND(C) derived types in the namespace so we can report errors
11801 for them once, rather than for each variable declared of that type. */
11804 resolve_bind_c_derived_types (gfc_symbol
*derived_sym
)
11806 if (derived_sym
!= NULL
&& derived_sym
->attr
.flavor
== FL_DERIVED
11807 && derived_sym
->attr
.is_bind_c
== 1)
11808 verify_bind_c_derived_type (derived_sym
);
11814 /* Check the interfaces of DTIO procedures associated with derived
11815 type 'sym'. These procedures can either have typebound bindings or
11816 can appear in DTIO generic interfaces. */
11819 gfc_verify_DTIO_procedures (gfc_symbol
*sym
)
11821 if (!sym
|| sym
->attr
.flavor
!= FL_DERIVED
)
11824 gfc_check_dtio_interfaces (sym
);
11829 /* Verify that any binding labels used in a given namespace do not collide
11830 with the names or binding labels of any global symbols. Multiple INTERFACE
11831 for the same procedure are permitted. */
11834 gfc_verify_binding_labels (gfc_symbol
*sym
)
11837 const char *module
;
11839 if (!sym
|| !sym
->attr
.is_bind_c
|| sym
->attr
.is_iso_c
11840 || sym
->attr
.flavor
== FL_DERIVED
|| !sym
->binding_label
)
11843 gsym
= gfc_find_case_gsymbol (gfc_gsym_root
, sym
->binding_label
);
11846 module
= sym
->module
;
11847 else if (sym
->ns
&& sym
->ns
->proc_name
11848 && sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
)
11849 module
= sym
->ns
->proc_name
->name
;
11850 else if (sym
->ns
&& sym
->ns
->parent
11851 && sym
->ns
&& sym
->ns
->parent
->proc_name
11852 && sym
->ns
->parent
->proc_name
->attr
.flavor
== FL_MODULE
)
11853 module
= sym
->ns
->parent
->proc_name
->name
;
11859 && (gsym
->type
== GSYM_FUNCTION
|| gsym
->type
== GSYM_SUBROUTINE
)))
11862 gsym
= gfc_get_gsymbol (sym
->binding_label
, true);
11863 gsym
->where
= sym
->declared_at
;
11864 gsym
->sym_name
= sym
->name
;
11865 gsym
->binding_label
= sym
->binding_label
;
11866 gsym
->ns
= sym
->ns
;
11867 gsym
->mod_name
= module
;
11868 if (sym
->attr
.function
)
11869 gsym
->type
= GSYM_FUNCTION
;
11870 else if (sym
->attr
.subroutine
)
11871 gsym
->type
= GSYM_SUBROUTINE
;
11872 /* Mark as variable/procedure as defined, unless its an INTERFACE. */
11873 gsym
->defined
= sym
->attr
.if_source
!= IFSRC_IFBODY
;
11877 if (sym
->attr
.flavor
== FL_VARIABLE
&& gsym
->type
!= GSYM_UNKNOWN
)
11879 gfc_error ("Variable %qs with binding label %qs at %L uses the same global "
11880 "identifier as entity at %L", sym
->name
,
11881 sym
->binding_label
, &sym
->declared_at
, &gsym
->where
);
11882 /* Clear the binding label to prevent checking multiple times. */
11883 sym
->binding_label
= NULL
;
11887 if (sym
->attr
.flavor
== FL_VARIABLE
&& module
11888 && (strcmp (module
, gsym
->mod_name
) != 0
11889 || strcmp (sym
->name
, gsym
->sym_name
) != 0))
11891 /* This can only happen if the variable is defined in a module - if it
11892 isn't the same module, reject it. */
11893 gfc_error ("Variable %qs from module %qs with binding label %qs at %L "
11894 "uses the same global identifier as entity at %L from module %qs",
11895 sym
->name
, module
, sym
->binding_label
,
11896 &sym
->declared_at
, &gsym
->where
, gsym
->mod_name
);
11897 sym
->binding_label
= NULL
;
11901 if ((sym
->attr
.function
|| sym
->attr
.subroutine
)
11902 && ((gsym
->type
!= GSYM_SUBROUTINE
&& gsym
->type
!= GSYM_FUNCTION
)
11903 || (gsym
->defined
&& sym
->attr
.if_source
!= IFSRC_IFBODY
))
11904 && (sym
!= gsym
->ns
->proc_name
&& sym
->attr
.entry
== 0)
11905 && (module
!= gsym
->mod_name
11906 || strcmp (gsym
->sym_name
, sym
->name
) != 0
11907 || (module
&& strcmp (module
, gsym
->mod_name
) != 0)))
11909 /* Print an error if the procedure is defined multiple times; we have to
11910 exclude references to the same procedure via module association or
11911 multiple checks for the same procedure. */
11912 gfc_error ("Procedure %qs with binding label %qs at %L uses the same "
11913 "global identifier as entity at %L", sym
->name
,
11914 sym
->binding_label
, &sym
->declared_at
, &gsym
->where
);
11915 sym
->binding_label
= NULL
;
11920 /* Resolve an index expression. */
11923 resolve_index_expr (gfc_expr
*e
)
11925 if (!gfc_resolve_expr (e
))
11928 if (!gfc_simplify_expr (e
, 0))
11931 if (!gfc_specification_expr (e
))
11938 /* Resolve a charlen structure. */
11941 resolve_charlen (gfc_charlen
*cl
)
11944 bool saved_specification_expr
;
11950 saved_specification_expr
= specification_expr
;
11951 specification_expr
= true;
11953 if (cl
->length_from_typespec
)
11955 if (!gfc_resolve_expr (cl
->length
))
11957 specification_expr
= saved_specification_expr
;
11961 if (!gfc_simplify_expr (cl
->length
, 0))
11963 specification_expr
= saved_specification_expr
;
11967 /* cl->length has been resolved. It should have an integer type. */
11968 if (cl
->length
->ts
.type
!= BT_INTEGER
)
11970 gfc_error ("Scalar INTEGER expression expected at %L",
11971 &cl
->length
->where
);
11977 if (!resolve_index_expr (cl
->length
))
11979 specification_expr
= saved_specification_expr
;
11984 /* F2008, 4.4.3.2: If the character length parameter value evaluates to
11985 a negative value, the length of character entities declared is zero. */
11986 if (cl
->length
&& cl
->length
->expr_type
== EXPR_CONSTANT
11987 && mpz_sgn (cl
->length
->value
.integer
) < 0)
11988 gfc_replace_expr (cl
->length
,
11989 gfc_get_int_expr (gfc_charlen_int_kind
, NULL
, 0));
11991 /* Check that the character length is not too large. */
11992 k
= gfc_validate_kind (BT_INTEGER
, gfc_charlen_int_kind
, false);
11993 if (cl
->length
&& cl
->length
->expr_type
== EXPR_CONSTANT
11994 && cl
->length
->ts
.type
== BT_INTEGER
11995 && mpz_cmp (cl
->length
->value
.integer
, gfc_integer_kinds
[k
].huge
) > 0)
11997 gfc_error ("String length at %L is too large", &cl
->length
->where
);
11998 specification_expr
= saved_specification_expr
;
12002 specification_expr
= saved_specification_expr
;
12007 /* Test for non-constant shape arrays. */
12010 is_non_constant_shape_array (gfc_symbol
*sym
)
12016 not_constant
= false;
12017 if (sym
->as
!= NULL
)
12019 /* Unfortunately, !gfc_is_compile_time_shape hits a legal case that
12020 has not been simplified; parameter array references. Do the
12021 simplification now. */
12022 for (i
= 0; i
< sym
->as
->rank
+ sym
->as
->corank
; i
++)
12024 e
= sym
->as
->lower
[i
];
12025 if (e
&& (!resolve_index_expr(e
)
12026 || !gfc_is_constant_expr (e
)))
12027 not_constant
= true;
12028 e
= sym
->as
->upper
[i
];
12029 if (e
&& (!resolve_index_expr(e
)
12030 || !gfc_is_constant_expr (e
)))
12031 not_constant
= true;
12034 return not_constant
;
12037 /* Given a symbol and an initialization expression, add code to initialize
12038 the symbol to the function entry. */
12040 build_init_assign (gfc_symbol
*sym
, gfc_expr
*init
)
12044 gfc_namespace
*ns
= sym
->ns
;
12046 /* Search for the function namespace if this is a contained
12047 function without an explicit result. */
12048 if (sym
->attr
.function
&& sym
== sym
->result
12049 && sym
->name
!= sym
->ns
->proc_name
->name
)
12051 ns
= ns
->contained
;
12052 for (;ns
; ns
= ns
->sibling
)
12053 if (strcmp (ns
->proc_name
->name
, sym
->name
) == 0)
12059 gfc_free_expr (init
);
12063 /* Build an l-value expression for the result. */
12064 lval
= gfc_lval_expr_from_sym (sym
);
12066 /* Add the code at scope entry. */
12067 init_st
= gfc_get_code (EXEC_INIT_ASSIGN
);
12068 init_st
->next
= ns
->code
;
12069 ns
->code
= init_st
;
12071 /* Assign the default initializer to the l-value. */
12072 init_st
->loc
= sym
->declared_at
;
12073 init_st
->expr1
= lval
;
12074 init_st
->expr2
= init
;
12078 /* Whether or not we can generate a default initializer for a symbol. */
12081 can_generate_init (gfc_symbol
*sym
)
12083 symbol_attribute
*a
;
12088 /* These symbols should never have a default initialization. */
12093 || (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
)
12094 && (CLASS_DATA (sym
)->attr
.class_pointer
12095 || CLASS_DATA (sym
)->attr
.proc_pointer
))
12096 || a
->in_equivalence
12103 || (!a
->referenced
&& !a
->result
)
12104 || (a
->dummy
&& a
->intent
!= INTENT_OUT
)
12105 || (a
->function
&& sym
!= sym
->result
)
12110 /* Assign the default initializer to a derived type variable or result. */
12113 apply_default_init (gfc_symbol
*sym
)
12115 gfc_expr
*init
= NULL
;
12117 if (sym
->attr
.flavor
!= FL_VARIABLE
&& !sym
->attr
.function
)
12120 if (sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
)
12121 init
= gfc_generate_initializer (&sym
->ts
, can_generate_init (sym
));
12123 if (init
== NULL
&& sym
->ts
.type
!= BT_CLASS
)
12126 build_init_assign (sym
, init
);
12127 sym
->attr
.referenced
= 1;
12131 /* Build an initializer for a local. Returns null if the symbol should not have
12132 a default initialization. */
12135 build_default_init_expr (gfc_symbol
*sym
)
12137 /* These symbols should never have a default initialization. */
12138 if (sym
->attr
.allocatable
12139 || sym
->attr
.external
12141 || sym
->attr
.pointer
12142 || sym
->attr
.in_equivalence
12143 || sym
->attr
.in_common
12146 || sym
->attr
.cray_pointee
12147 || sym
->attr
.cray_pointer
12151 /* Get the appropriate init expression. */
12152 return gfc_build_default_init_expr (&sym
->ts
, &sym
->declared_at
);
12155 /* Add an initialization expression to a local variable. */
12157 apply_default_init_local (gfc_symbol
*sym
)
12159 gfc_expr
*init
= NULL
;
12161 /* The symbol should be a variable or a function return value. */
12162 if ((sym
->attr
.flavor
!= FL_VARIABLE
&& !sym
->attr
.function
)
12163 || (sym
->attr
.function
&& sym
->result
!= sym
))
12166 /* Try to build the initializer expression. If we can't initialize
12167 this symbol, then init will be NULL. */
12168 init
= build_default_init_expr (sym
);
12172 /* For saved variables, we don't want to add an initializer at function
12173 entry, so we just add a static initializer. Note that automatic variables
12174 are stack allocated even with -fno-automatic; we have also to exclude
12175 result variable, which are also nonstatic. */
12176 if (!sym
->attr
.automatic
12177 && (sym
->attr
.save
|| sym
->ns
->save_all
12178 || (flag_max_stack_var_size
== 0 && !sym
->attr
.result
12179 && (sym
->ns
->proc_name
&& !sym
->ns
->proc_name
->attr
.recursive
)
12180 && (!sym
->attr
.dimension
|| !is_non_constant_shape_array (sym
)))))
12182 /* Don't clobber an existing initializer! */
12183 gcc_assert (sym
->value
== NULL
);
12188 build_init_assign (sym
, init
);
12192 /* Resolution of common features of flavors variable and procedure. */
12195 resolve_fl_var_and_proc (gfc_symbol
*sym
, int mp_flag
)
12197 gfc_array_spec
*as
;
12199 if (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
)
12200 as
= CLASS_DATA (sym
)->as
;
12204 /* Constraints on deferred shape variable. */
12205 if (as
== NULL
|| as
->type
!= AS_DEFERRED
)
12207 bool pointer
, allocatable
, dimension
;
12209 if (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
)
12211 pointer
= CLASS_DATA (sym
)->attr
.class_pointer
;
12212 allocatable
= CLASS_DATA (sym
)->attr
.allocatable
;
12213 dimension
= CLASS_DATA (sym
)->attr
.dimension
;
12217 pointer
= sym
->attr
.pointer
&& !sym
->attr
.select_type_temporary
;
12218 allocatable
= sym
->attr
.allocatable
;
12219 dimension
= sym
->attr
.dimension
;
12224 if (dimension
&& as
->type
!= AS_ASSUMED_RANK
)
12226 gfc_error ("Allocatable array %qs at %L must have a deferred "
12227 "shape or assumed rank", sym
->name
, &sym
->declared_at
);
12230 else if (!gfc_notify_std (GFC_STD_F2003
, "Scalar object "
12231 "%qs at %L may not be ALLOCATABLE",
12232 sym
->name
, &sym
->declared_at
))
12236 if (pointer
&& dimension
&& as
->type
!= AS_ASSUMED_RANK
)
12238 gfc_error ("Array pointer %qs at %L must have a deferred shape or "
12239 "assumed rank", sym
->name
, &sym
->declared_at
);
12245 if (!mp_flag
&& !sym
->attr
.allocatable
&& !sym
->attr
.pointer
12246 && sym
->ts
.type
!= BT_CLASS
&& !sym
->assoc
)
12248 gfc_error ("Array %qs at %L cannot have a deferred shape",
12249 sym
->name
, &sym
->declared_at
);
12254 /* Constraints on polymorphic variables. */
12255 if (sym
->ts
.type
== BT_CLASS
&& !(sym
->result
&& sym
->result
!= sym
))
12258 if (sym
->attr
.class_ok
12259 && !sym
->attr
.select_type_temporary
12260 && !UNLIMITED_POLY (sym
)
12261 && !gfc_type_is_extensible (CLASS_DATA (sym
)->ts
.u
.derived
))
12263 gfc_error ("Type %qs of CLASS variable %qs at %L is not extensible",
12264 CLASS_DATA (sym
)->ts
.u
.derived
->name
, sym
->name
,
12265 &sym
->declared_at
);
12270 /* Assume that use associated symbols were checked in the module ns.
12271 Class-variables that are associate-names are also something special
12272 and excepted from the test. */
12273 if (!sym
->attr
.class_ok
&& !sym
->attr
.use_assoc
&& !sym
->assoc
)
12275 gfc_error ("CLASS variable %qs at %L must be dummy, allocatable "
12276 "or pointer", sym
->name
, &sym
->declared_at
);
12285 /* Additional checks for symbols with flavor variable and derived
12286 type. To be called from resolve_fl_variable. */
12289 resolve_fl_variable_derived (gfc_symbol
*sym
, int no_init_flag
)
12291 gcc_assert (sym
->ts
.type
== BT_DERIVED
|| sym
->ts
.type
== BT_CLASS
);
12293 /* Check to see if a derived type is blocked from being host
12294 associated by the presence of another class I symbol in the same
12295 namespace. 14.6.1.3 of the standard and the discussion on
12296 comp.lang.fortran. */
12297 if (sym
->ns
!= sym
->ts
.u
.derived
->ns
12298 && !sym
->ts
.u
.derived
->attr
.use_assoc
12299 && sym
->ns
->proc_name
->attr
.if_source
!= IFSRC_IFBODY
)
12302 gfc_find_symbol (sym
->ts
.u
.derived
->name
, sym
->ns
, 0, &s
);
12303 if (s
&& s
->attr
.generic
)
12304 s
= gfc_find_dt_in_generic (s
);
12305 if (s
&& !gfc_fl_struct (s
->attr
.flavor
))
12307 gfc_error ("The type %qs cannot be host associated at %L "
12308 "because it is blocked by an incompatible object "
12309 "of the same name declared at %L",
12310 sym
->ts
.u
.derived
->name
, &sym
->declared_at
,
12316 /* 4th constraint in section 11.3: "If an object of a type for which
12317 component-initialization is specified (R429) appears in the
12318 specification-part of a module and does not have the ALLOCATABLE
12319 or POINTER attribute, the object shall have the SAVE attribute."
12321 The check for initializers is performed with
12322 gfc_has_default_initializer because gfc_default_initializer generates
12323 a hidden default for allocatable components. */
12324 if (!(sym
->value
|| no_init_flag
) && sym
->ns
->proc_name
12325 && sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
12326 && !(sym
->ns
->save_all
&& !sym
->attr
.automatic
) && !sym
->attr
.save
12327 && !sym
->attr
.pointer
&& !sym
->attr
.allocatable
12328 && gfc_has_default_initializer (sym
->ts
.u
.derived
)
12329 && !gfc_notify_std (GFC_STD_F2008
, "Implied SAVE for module variable "
12330 "%qs at %L, needed due to the default "
12331 "initialization", sym
->name
, &sym
->declared_at
))
12334 /* Assign default initializer. */
12335 if (!(sym
->value
|| sym
->attr
.pointer
|| sym
->attr
.allocatable
)
12336 && (!no_init_flag
|| sym
->attr
.intent
== INTENT_OUT
))
12337 sym
->value
= gfc_generate_initializer (&sym
->ts
, can_generate_init (sym
));
12343 /* F2008, C402 (R401): A colon shall not be used as a type-param-value
12344 except in the declaration of an entity or component that has the POINTER
12345 or ALLOCATABLE attribute. */
12348 deferred_requirements (gfc_symbol
*sym
)
12350 if (sym
->ts
.deferred
12351 && !(sym
->attr
.pointer
12352 || sym
->attr
.allocatable
12353 || sym
->attr
.associate_var
12354 || sym
->attr
.omp_udr_artificial_var
))
12356 gfc_error ("Entity %qs at %L has a deferred type parameter and "
12357 "requires either the POINTER or ALLOCATABLE attribute",
12358 sym
->name
, &sym
->declared_at
);
12365 /* Resolve symbols with flavor variable. */
12368 resolve_fl_variable (gfc_symbol
*sym
, int mp_flag
)
12370 const char *auto_save_msg
= "Automatic object %qs at %L cannot have the "
12373 if (!resolve_fl_var_and_proc (sym
, mp_flag
))
12376 /* Set this flag to check that variables are parameters of all entries.
12377 This check is effected by the call to gfc_resolve_expr through
12378 is_non_constant_shape_array. */
12379 bool saved_specification_expr
= specification_expr
;
12380 specification_expr
= true;
12382 if (sym
->ns
->proc_name
12383 && (sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
12384 || sym
->ns
->proc_name
->attr
.is_main_program
)
12385 && !sym
->attr
.use_assoc
12386 && !sym
->attr
.allocatable
12387 && !sym
->attr
.pointer
12388 && is_non_constant_shape_array (sym
))
12390 /* F08:C541. The shape of an array defined in a main program or module
12391 * needs to be constant. */
12392 gfc_error ("The module or main program array %qs at %L must "
12393 "have constant shape", sym
->name
, &sym
->declared_at
);
12394 specification_expr
= saved_specification_expr
;
12398 /* Constraints on deferred type parameter. */
12399 if (!deferred_requirements (sym
))
12402 if (sym
->ts
.type
== BT_CHARACTER
&& !sym
->attr
.associate_var
)
12404 /* Make sure that character string variables with assumed length are
12405 dummy arguments. */
12406 gfc_expr
*e
= NULL
;
12409 e
= sym
->ts
.u
.cl
->length
;
12413 if (e
== NULL
&& !sym
->attr
.dummy
&& !sym
->attr
.result
12414 && !sym
->ts
.deferred
&& !sym
->attr
.select_type_temporary
12415 && !sym
->attr
.omp_udr_artificial_var
)
12417 gfc_error ("Entity with assumed character length at %L must be a "
12418 "dummy argument or a PARAMETER", &sym
->declared_at
);
12419 specification_expr
= saved_specification_expr
;
12423 if (e
&& sym
->attr
.save
== SAVE_EXPLICIT
&& !gfc_is_constant_expr (e
))
12425 gfc_error (auto_save_msg
, sym
->name
, &sym
->declared_at
);
12426 specification_expr
= saved_specification_expr
;
12430 if (!gfc_is_constant_expr (e
)
12431 && !(e
->expr_type
== EXPR_VARIABLE
12432 && e
->symtree
->n
.sym
->attr
.flavor
== FL_PARAMETER
))
12434 if (!sym
->attr
.use_assoc
&& sym
->ns
->proc_name
12435 && (sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
12436 || sym
->ns
->proc_name
->attr
.is_main_program
))
12438 gfc_error ("%qs at %L must have constant character length "
12439 "in this context", sym
->name
, &sym
->declared_at
);
12440 specification_expr
= saved_specification_expr
;
12443 if (sym
->attr
.in_common
)
12445 gfc_error ("COMMON variable %qs at %L must have constant "
12446 "character length", sym
->name
, &sym
->declared_at
);
12447 specification_expr
= saved_specification_expr
;
12453 if (sym
->value
== NULL
&& sym
->attr
.referenced
)
12454 apply_default_init_local (sym
); /* Try to apply a default initialization. */
12456 /* Determine if the symbol may not have an initializer. */
12457 int no_init_flag
= 0, automatic_flag
= 0;
12458 if (sym
->attr
.allocatable
|| sym
->attr
.external
|| sym
->attr
.dummy
12459 || sym
->attr
.intrinsic
|| sym
->attr
.result
)
12461 else if ((sym
->attr
.dimension
|| sym
->attr
.codimension
) && !sym
->attr
.pointer
12462 && is_non_constant_shape_array (sym
))
12464 no_init_flag
= automatic_flag
= 1;
12466 /* Also, they must not have the SAVE attribute.
12467 SAVE_IMPLICIT is checked below. */
12468 if (sym
->as
&& sym
->attr
.codimension
)
12470 int corank
= sym
->as
->corank
;
12471 sym
->as
->corank
= 0;
12472 no_init_flag
= automatic_flag
= is_non_constant_shape_array (sym
);
12473 sym
->as
->corank
= corank
;
12475 if (automatic_flag
&& sym
->attr
.save
== SAVE_EXPLICIT
)
12477 gfc_error (auto_save_msg
, sym
->name
, &sym
->declared_at
);
12478 specification_expr
= saved_specification_expr
;
12483 /* Ensure that any initializer is simplified. */
12485 gfc_simplify_expr (sym
->value
, 1);
12487 /* Reject illegal initializers. */
12488 if (!sym
->mark
&& sym
->value
)
12490 if (sym
->attr
.allocatable
|| (sym
->ts
.type
== BT_CLASS
12491 && CLASS_DATA (sym
)->attr
.allocatable
))
12492 gfc_error ("Allocatable %qs at %L cannot have an initializer",
12493 sym
->name
, &sym
->declared_at
);
12494 else if (sym
->attr
.external
)
12495 gfc_error ("External %qs at %L cannot have an initializer",
12496 sym
->name
, &sym
->declared_at
);
12497 else if (sym
->attr
.dummy
12498 && !(sym
->ts
.type
== BT_DERIVED
&& sym
->attr
.intent
== INTENT_OUT
))
12499 gfc_error ("Dummy %qs at %L cannot have an initializer",
12500 sym
->name
, &sym
->declared_at
);
12501 else if (sym
->attr
.intrinsic
)
12502 gfc_error ("Intrinsic %qs at %L cannot have an initializer",
12503 sym
->name
, &sym
->declared_at
);
12504 else if (sym
->attr
.result
)
12505 gfc_error ("Function result %qs at %L cannot have an initializer",
12506 sym
->name
, &sym
->declared_at
);
12507 else if (automatic_flag
)
12508 gfc_error ("Automatic array %qs at %L cannot have an initializer",
12509 sym
->name
, &sym
->declared_at
);
12511 goto no_init_error
;
12512 specification_expr
= saved_specification_expr
;
12517 if (sym
->ts
.type
== BT_DERIVED
|| sym
->ts
.type
== BT_CLASS
)
12519 bool res
= resolve_fl_variable_derived (sym
, no_init_flag
);
12520 specification_expr
= saved_specification_expr
;
12524 specification_expr
= saved_specification_expr
;
12529 /* Compare the dummy characteristics of a module procedure interface
12530 declaration with the corresponding declaration in a submodule. */
12531 static gfc_formal_arglist
*new_formal
;
12532 static char errmsg
[200];
12535 compare_fsyms (gfc_symbol
*sym
)
12539 if (sym
== NULL
|| new_formal
== NULL
)
12542 fsym
= new_formal
->sym
;
12547 if (strcmp (sym
->name
, fsym
->name
) == 0)
12549 if (!gfc_check_dummy_characteristics (fsym
, sym
, true, errmsg
, 200))
12550 gfc_error ("%s at %L", errmsg
, &fsym
->declared_at
);
12555 /* Resolve a procedure. */
12558 resolve_fl_procedure (gfc_symbol
*sym
, int mp_flag
)
12560 gfc_formal_arglist
*arg
;
12562 if (sym
->attr
.function
12563 && !resolve_fl_var_and_proc (sym
, mp_flag
))
12566 if (sym
->ts
.type
== BT_CHARACTER
)
12568 gfc_charlen
*cl
= sym
->ts
.u
.cl
;
12570 if (cl
&& cl
->length
&& gfc_is_constant_expr (cl
->length
)
12571 && !resolve_charlen (cl
))
12574 if ((!cl
|| !cl
->length
|| cl
->length
->expr_type
!= EXPR_CONSTANT
)
12575 && sym
->attr
.proc
== PROC_ST_FUNCTION
)
12577 gfc_error ("Character-valued statement function %qs at %L must "
12578 "have constant length", sym
->name
, &sym
->declared_at
);
12583 /* Ensure that derived type for are not of a private type. Internal
12584 module procedures are excluded by 2.2.3.3 - i.e., they are not
12585 externally accessible and can access all the objects accessible in
12587 if (!(sym
->ns
->parent
&& sym
->ns
->parent
->proc_name
12588 && sym
->ns
->parent
->proc_name
->attr
.flavor
== FL_MODULE
)
12589 && gfc_check_symbol_access (sym
))
12591 gfc_interface
*iface
;
12593 for (arg
= gfc_sym_get_dummy_args (sym
); arg
; arg
= arg
->next
)
12596 && arg
->sym
->ts
.type
== BT_DERIVED
12597 && !arg
->sym
->ts
.u
.derived
->attr
.use_assoc
12598 && !gfc_check_symbol_access (arg
->sym
->ts
.u
.derived
)
12599 && !gfc_notify_std (GFC_STD_F2003
, "%qs is of a PRIVATE type "
12600 "and cannot be a dummy argument"
12601 " of %qs, which is PUBLIC at %L",
12602 arg
->sym
->name
, sym
->name
,
12603 &sym
->declared_at
))
12605 /* Stop this message from recurring. */
12606 arg
->sym
->ts
.u
.derived
->attr
.access
= ACCESS_PUBLIC
;
12611 /* PUBLIC interfaces may expose PRIVATE procedures that take types
12612 PRIVATE to the containing module. */
12613 for (iface
= sym
->generic
; iface
; iface
= iface
->next
)
12615 for (arg
= gfc_sym_get_dummy_args (iface
->sym
); arg
; arg
= arg
->next
)
12618 && arg
->sym
->ts
.type
== BT_DERIVED
12619 && !arg
->sym
->ts
.u
.derived
->attr
.use_assoc
12620 && !gfc_check_symbol_access (arg
->sym
->ts
.u
.derived
)
12621 && !gfc_notify_std (GFC_STD_F2003
, "Procedure %qs in "
12622 "PUBLIC interface %qs at %L "
12623 "takes dummy arguments of %qs which "
12624 "is PRIVATE", iface
->sym
->name
,
12625 sym
->name
, &iface
->sym
->declared_at
,
12626 gfc_typename(&arg
->sym
->ts
)))
12628 /* Stop this message from recurring. */
12629 arg
->sym
->ts
.u
.derived
->attr
.access
= ACCESS_PUBLIC
;
12636 if (sym
->attr
.function
&& sym
->value
&& sym
->attr
.proc
!= PROC_ST_FUNCTION
12637 && !sym
->attr
.proc_pointer
)
12639 gfc_error ("Function %qs at %L cannot have an initializer",
12640 sym
->name
, &sym
->declared_at
);
12642 /* Make sure no second error is issued for this. */
12643 sym
->value
->error
= 1;
12647 /* An external symbol may not have an initializer because it is taken to be
12648 a procedure. Exception: Procedure Pointers. */
12649 if (sym
->attr
.external
&& sym
->value
&& !sym
->attr
.proc_pointer
)
12651 gfc_error ("External object %qs at %L may not have an initializer",
12652 sym
->name
, &sym
->declared_at
);
12656 /* An elemental function is required to return a scalar 12.7.1 */
12657 if (sym
->attr
.elemental
&& sym
->attr
.function
12658 && (sym
->as
|| (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
)->as
)))
12660 gfc_error ("ELEMENTAL function %qs at %L must have a scalar "
12661 "result", sym
->name
, &sym
->declared_at
);
12662 /* Reset so that the error only occurs once. */
12663 sym
->attr
.elemental
= 0;
12667 if (sym
->attr
.proc
== PROC_ST_FUNCTION
12668 && (sym
->attr
.allocatable
|| sym
->attr
.pointer
))
12670 gfc_error ("Statement function %qs at %L may not have pointer or "
12671 "allocatable attribute", sym
->name
, &sym
->declared_at
);
12675 /* 5.1.1.5 of the Standard: A function name declared with an asterisk
12676 char-len-param shall not be array-valued, pointer-valued, recursive
12677 or pure. ....snip... A character value of * may only be used in the
12678 following ways: (i) Dummy arg of procedure - dummy associates with
12679 actual length; (ii) To declare a named constant; or (iii) External
12680 function - but length must be declared in calling scoping unit. */
12681 if (sym
->attr
.function
12682 && sym
->ts
.type
== BT_CHARACTER
&& !sym
->ts
.deferred
12683 && sym
->ts
.u
.cl
&& sym
->ts
.u
.cl
->length
== NULL
)
12685 if ((sym
->as
&& sym
->as
->rank
) || (sym
->attr
.pointer
)
12686 || (sym
->attr
.recursive
) || (sym
->attr
.pure
))
12688 if (sym
->as
&& sym
->as
->rank
)
12689 gfc_error ("CHARACTER(*) function %qs at %L cannot be "
12690 "array-valued", sym
->name
, &sym
->declared_at
);
12692 if (sym
->attr
.pointer
)
12693 gfc_error ("CHARACTER(*) function %qs at %L cannot be "
12694 "pointer-valued", sym
->name
, &sym
->declared_at
);
12696 if (sym
->attr
.pure
)
12697 gfc_error ("CHARACTER(*) function %qs at %L cannot be "
12698 "pure", sym
->name
, &sym
->declared_at
);
12700 if (sym
->attr
.recursive
)
12701 gfc_error ("CHARACTER(*) function %qs at %L cannot be "
12702 "recursive", sym
->name
, &sym
->declared_at
);
12707 /* Appendix B.2 of the standard. Contained functions give an
12708 error anyway. Deferred character length is an F2003 feature.
12709 Don't warn on intrinsic conversion functions, which start
12710 with two underscores. */
12711 if (!sym
->attr
.contained
&& !sym
->ts
.deferred
12712 && (sym
->name
[0] != '_' || sym
->name
[1] != '_'))
12713 gfc_notify_std (GFC_STD_F95_OBS
,
12714 "CHARACTER(*) function %qs at %L",
12715 sym
->name
, &sym
->declared_at
);
12718 /* F2008, C1218. */
12719 if (sym
->attr
.elemental
)
12721 if (sym
->attr
.proc_pointer
)
12723 gfc_error ("Procedure pointer %qs at %L shall not be elemental",
12724 sym
->name
, &sym
->declared_at
);
12727 if (sym
->attr
.dummy
)
12729 gfc_error ("Dummy procedure %qs at %L shall not be elemental",
12730 sym
->name
, &sym
->declared_at
);
12735 /* F2018, C15100: "The result of an elemental function shall be scalar,
12736 and shall not have the POINTER or ALLOCATABLE attribute." The scalar
12737 pointer is tested and caught elsewhere. */
12738 if (sym
->attr
.elemental
&& sym
->result
12739 && (sym
->result
->attr
.allocatable
|| sym
->result
->attr
.pointer
))
12741 gfc_error ("Function result variable %qs at %L of elemental "
12742 "function %qs shall not have an ALLOCATABLE or POINTER "
12743 "attribute", sym
->result
->name
,
12744 &sym
->result
->declared_at
, sym
->name
);
12748 if (sym
->attr
.is_bind_c
&& sym
->attr
.is_c_interop
!= 1)
12750 gfc_formal_arglist
*curr_arg
;
12751 int has_non_interop_arg
= 0;
12753 if (!verify_bind_c_sym (sym
, &(sym
->ts
), sym
->attr
.in_common
,
12754 sym
->common_block
))
12756 /* Clear these to prevent looking at them again if there was an
12758 sym
->attr
.is_bind_c
= 0;
12759 sym
->attr
.is_c_interop
= 0;
12760 sym
->ts
.is_c_interop
= 0;
12764 /* So far, no errors have been found. */
12765 sym
->attr
.is_c_interop
= 1;
12766 sym
->ts
.is_c_interop
= 1;
12769 curr_arg
= gfc_sym_get_dummy_args (sym
);
12770 while (curr_arg
!= NULL
)
12772 /* Skip implicitly typed dummy args here. */
12773 if (curr_arg
->sym
&& curr_arg
->sym
->attr
.implicit_type
== 0)
12774 if (!gfc_verify_c_interop_param (curr_arg
->sym
))
12775 /* If something is found to fail, record the fact so we
12776 can mark the symbol for the procedure as not being
12777 BIND(C) to try and prevent multiple errors being
12779 has_non_interop_arg
= 1;
12781 curr_arg
= curr_arg
->next
;
12784 /* See if any of the arguments were not interoperable and if so, clear
12785 the procedure symbol to prevent duplicate error messages. */
12786 if (has_non_interop_arg
!= 0)
12788 sym
->attr
.is_c_interop
= 0;
12789 sym
->ts
.is_c_interop
= 0;
12790 sym
->attr
.is_bind_c
= 0;
12794 if (!sym
->attr
.proc_pointer
)
12796 if (sym
->attr
.save
== SAVE_EXPLICIT
)
12798 gfc_error ("PROCEDURE attribute conflicts with SAVE attribute "
12799 "in %qs at %L", sym
->name
, &sym
->declared_at
);
12802 if (sym
->attr
.intent
)
12804 gfc_error ("PROCEDURE attribute conflicts with INTENT attribute "
12805 "in %qs at %L", sym
->name
, &sym
->declared_at
);
12808 if (sym
->attr
.subroutine
&& sym
->attr
.result
)
12810 gfc_error ("PROCEDURE attribute conflicts with RESULT attribute "
12811 "in %qs at %L", sym
->name
, &sym
->declared_at
);
12814 if (sym
->attr
.external
&& sym
->attr
.function
&& !sym
->attr
.module_procedure
12815 && ((sym
->attr
.if_source
== IFSRC_DECL
&& !sym
->attr
.procedure
)
12816 || sym
->attr
.contained
))
12818 gfc_error ("EXTERNAL attribute conflicts with FUNCTION attribute "
12819 "in %qs at %L", sym
->name
, &sym
->declared_at
);
12822 if (strcmp ("ppr@", sym
->name
) == 0)
12824 gfc_error ("Procedure pointer result %qs at %L "
12825 "is missing the pointer attribute",
12826 sym
->ns
->proc_name
->name
, &sym
->declared_at
);
12831 /* Assume that a procedure whose body is not known has references
12832 to external arrays. */
12833 if (sym
->attr
.if_source
!= IFSRC_DECL
)
12834 sym
->attr
.array_outer_dependency
= 1;
12836 /* Compare the characteristics of a module procedure with the
12837 interface declaration. Ideally this would be done with
12838 gfc_compare_interfaces but, at present, the formal interface
12839 cannot be copied to the ts.interface. */
12840 if (sym
->attr
.module_procedure
12841 && sym
->attr
.if_source
== IFSRC_DECL
)
12844 char name
[2*GFC_MAX_SYMBOL_LEN
+ 1];
12846 char *submodule_name
;
12847 strcpy (name
, sym
->ns
->proc_name
->name
);
12848 module_name
= strtok (name
, ".");
12849 submodule_name
= strtok (NULL
, ".");
12851 iface
= sym
->tlink
;
12854 /* Make sure that the result uses the correct charlen for deferred
12856 if (iface
&& sym
->result
12857 && iface
->ts
.type
== BT_CHARACTER
12858 && iface
->ts
.deferred
)
12859 sym
->result
->ts
.u
.cl
= iface
->ts
.u
.cl
;
12864 /* Check the procedure characteristics. */
12865 if (sym
->attr
.elemental
!= iface
->attr
.elemental
)
12867 gfc_error ("Mismatch in ELEMENTAL attribute between MODULE "
12868 "PROCEDURE at %L and its interface in %s",
12869 &sym
->declared_at
, module_name
);
12873 if (sym
->attr
.pure
!= iface
->attr
.pure
)
12875 gfc_error ("Mismatch in PURE attribute between MODULE "
12876 "PROCEDURE at %L and its interface in %s",
12877 &sym
->declared_at
, module_name
);
12881 if (sym
->attr
.recursive
!= iface
->attr
.recursive
)
12883 gfc_error ("Mismatch in RECURSIVE attribute between MODULE "
12884 "PROCEDURE at %L and its interface in %s",
12885 &sym
->declared_at
, module_name
);
12889 /* Check the result characteristics. */
12890 if (!gfc_check_result_characteristics (sym
, iface
, errmsg
, 200))
12892 gfc_error ("%s between the MODULE PROCEDURE declaration "
12893 "in MODULE %qs and the declaration at %L in "
12895 errmsg
, module_name
, &sym
->declared_at
,
12896 submodule_name
? submodule_name
: module_name
);
12901 /* Check the characteristics of the formal arguments. */
12902 if (sym
->formal
&& sym
->formal_ns
)
12904 for (arg
= sym
->formal
; arg
&& arg
->sym
; arg
= arg
->next
)
12907 gfc_traverse_ns (sym
->formal_ns
, compare_fsyms
);
12915 /* Resolve a list of finalizer procedures. That is, after they have hopefully
12916 been defined and we now know their defined arguments, check that they fulfill
12917 the requirements of the standard for procedures used as finalizers. */
12920 gfc_resolve_finalizers (gfc_symbol
* derived
, bool *finalizable
)
12922 gfc_finalizer
* list
;
12923 gfc_finalizer
** prev_link
; /* For removing wrong entries from the list. */
12924 bool result
= true;
12925 bool seen_scalar
= false;
12928 gfc_symbol
*parent
= gfc_get_derived_super_type (derived
);
12931 gfc_resolve_finalizers (parent
, finalizable
);
12933 /* Ensure that derived-type components have a their finalizers resolved. */
12934 bool has_final
= derived
->f2k_derived
&& derived
->f2k_derived
->finalizers
;
12935 for (c
= derived
->components
; c
; c
= c
->next
)
12936 if (c
->ts
.type
== BT_DERIVED
12937 && !c
->attr
.pointer
&& !c
->attr
.proc_pointer
&& !c
->attr
.allocatable
)
12939 bool has_final2
= false;
12940 if (!gfc_resolve_finalizers (c
->ts
.u
.derived
, &has_final2
))
12941 return false; /* Error. */
12942 has_final
= has_final
|| has_final2
;
12944 /* Return early if not finalizable. */
12948 *finalizable
= false;
12952 /* Walk over the list of finalizer-procedures, check them, and if any one
12953 does not fit in with the standard's definition, print an error and remove
12954 it from the list. */
12955 prev_link
= &derived
->f2k_derived
->finalizers
;
12956 for (list
= derived
->f2k_derived
->finalizers
; list
; list
= *prev_link
)
12958 gfc_formal_arglist
*dummy_args
;
12963 /* Skip this finalizer if we already resolved it. */
12964 if (list
->proc_tree
)
12966 if (list
->proc_tree
->n
.sym
->formal
->sym
->as
== NULL
12967 || list
->proc_tree
->n
.sym
->formal
->sym
->as
->rank
== 0)
12968 seen_scalar
= true;
12969 prev_link
= &(list
->next
);
12973 /* Check this exists and is a SUBROUTINE. */
12974 if (!list
->proc_sym
->attr
.subroutine
)
12976 gfc_error ("FINAL procedure %qs at %L is not a SUBROUTINE",
12977 list
->proc_sym
->name
, &list
->where
);
12981 /* We should have exactly one argument. */
12982 dummy_args
= gfc_sym_get_dummy_args (list
->proc_sym
);
12983 if (!dummy_args
|| dummy_args
->next
)
12985 gfc_error ("FINAL procedure at %L must have exactly one argument",
12989 arg
= dummy_args
->sym
;
12991 /* This argument must be of our type. */
12992 if (arg
->ts
.type
!= BT_DERIVED
|| arg
->ts
.u
.derived
!= derived
)
12994 gfc_error ("Argument of FINAL procedure at %L must be of type %qs",
12995 &arg
->declared_at
, derived
->name
);
12999 /* It must neither be a pointer nor allocatable nor optional. */
13000 if (arg
->attr
.pointer
)
13002 gfc_error ("Argument of FINAL procedure at %L must not be a POINTER",
13003 &arg
->declared_at
);
13006 if (arg
->attr
.allocatable
)
13008 gfc_error ("Argument of FINAL procedure at %L must not be"
13009 " ALLOCATABLE", &arg
->declared_at
);
13012 if (arg
->attr
.optional
)
13014 gfc_error ("Argument of FINAL procedure at %L must not be OPTIONAL",
13015 &arg
->declared_at
);
13019 /* It must not be INTENT(OUT). */
13020 if (arg
->attr
.intent
== INTENT_OUT
)
13022 gfc_error ("Argument of FINAL procedure at %L must not be"
13023 " INTENT(OUT)", &arg
->declared_at
);
13027 /* Warn if the procedure is non-scalar and not assumed shape. */
13028 if (warn_surprising
&& arg
->as
&& arg
->as
->rank
!= 0
13029 && arg
->as
->type
!= AS_ASSUMED_SHAPE
)
13030 gfc_warning (OPT_Wsurprising
,
13031 "Non-scalar FINAL procedure at %L should have assumed"
13032 " shape argument", &arg
->declared_at
);
13034 /* Check that it does not match in kind and rank with a FINAL procedure
13035 defined earlier. To really loop over the *earlier* declarations,
13036 we need to walk the tail of the list as new ones were pushed at the
13038 /* TODO: Handle kind parameters once they are implemented. */
13039 my_rank
= (arg
->as
? arg
->as
->rank
: 0);
13040 for (i
= list
->next
; i
; i
= i
->next
)
13042 gfc_formal_arglist
*dummy_args
;
13044 /* Argument list might be empty; that is an error signalled earlier,
13045 but we nevertheless continued resolving. */
13046 dummy_args
= gfc_sym_get_dummy_args (i
->proc_sym
);
13049 gfc_symbol
* i_arg
= dummy_args
->sym
;
13050 const int i_rank
= (i_arg
->as
? i_arg
->as
->rank
: 0);
13051 if (i_rank
== my_rank
)
13053 gfc_error ("FINAL procedure %qs declared at %L has the same"
13054 " rank (%d) as %qs",
13055 list
->proc_sym
->name
, &list
->where
, my_rank
,
13056 i
->proc_sym
->name
);
13062 /* Is this the/a scalar finalizer procedure? */
13064 seen_scalar
= true;
13066 /* Find the symtree for this procedure. */
13067 gcc_assert (!list
->proc_tree
);
13068 list
->proc_tree
= gfc_find_sym_in_symtree (list
->proc_sym
);
13070 prev_link
= &list
->next
;
13073 /* Remove wrong nodes immediately from the list so we don't risk any
13074 troubles in the future when they might fail later expectations. */
13077 *prev_link
= list
->next
;
13078 gfc_free_finalizer (i
);
13082 if (result
== false)
13085 /* Warn if we haven't seen a scalar finalizer procedure (but we know there
13086 were nodes in the list, must have been for arrays. It is surely a good
13087 idea to have a scalar version there if there's something to finalize. */
13088 if (warn_surprising
&& derived
->f2k_derived
->finalizers
&& !seen_scalar
)
13089 gfc_warning (OPT_Wsurprising
,
13090 "Only array FINAL procedures declared for derived type %qs"
13091 " defined at %L, suggest also scalar one",
13092 derived
->name
, &derived
->declared_at
);
13094 vtab
= gfc_find_derived_vtab (derived
);
13095 c
= vtab
->ts
.u
.derived
->components
->next
->next
->next
->next
->next
;
13096 gfc_set_sym_referenced (c
->initializer
->symtree
->n
.sym
);
13099 *finalizable
= true;
13105 /* Check if two GENERIC targets are ambiguous and emit an error is they are. */
13108 check_generic_tbp_ambiguity (gfc_tbp_generic
* t1
, gfc_tbp_generic
* t2
,
13109 const char* generic_name
, locus where
)
13111 gfc_symbol
*sym1
, *sym2
;
13112 const char *pass1
, *pass2
;
13113 gfc_formal_arglist
*dummy_args
;
13115 gcc_assert (t1
->specific
&& t2
->specific
);
13116 gcc_assert (!t1
->specific
->is_generic
);
13117 gcc_assert (!t2
->specific
->is_generic
);
13118 gcc_assert (t1
->is_operator
== t2
->is_operator
);
13120 sym1
= t1
->specific
->u
.specific
->n
.sym
;
13121 sym2
= t2
->specific
->u
.specific
->n
.sym
;
13126 /* Both must be SUBROUTINEs or both must be FUNCTIONs. */
13127 if (sym1
->attr
.subroutine
!= sym2
->attr
.subroutine
13128 || sym1
->attr
.function
!= sym2
->attr
.function
)
13130 gfc_error ("%qs and %qs cannot be mixed FUNCTION/SUBROUTINE for"
13131 " GENERIC %qs at %L",
13132 sym1
->name
, sym2
->name
, generic_name
, &where
);
13136 /* Determine PASS arguments. */
13137 if (t1
->specific
->nopass
)
13139 else if (t1
->specific
->pass_arg
)
13140 pass1
= t1
->specific
->pass_arg
;
13143 dummy_args
= gfc_sym_get_dummy_args (t1
->specific
->u
.specific
->n
.sym
);
13145 pass1
= dummy_args
->sym
->name
;
13149 if (t2
->specific
->nopass
)
13151 else if (t2
->specific
->pass_arg
)
13152 pass2
= t2
->specific
->pass_arg
;
13155 dummy_args
= gfc_sym_get_dummy_args (t2
->specific
->u
.specific
->n
.sym
);
13157 pass2
= dummy_args
->sym
->name
;
13162 /* Compare the interfaces. */
13163 if (gfc_compare_interfaces (sym1
, sym2
, sym2
->name
, !t1
->is_operator
, 0,
13164 NULL
, 0, pass1
, pass2
))
13166 gfc_error ("%qs and %qs for GENERIC %qs at %L are ambiguous",
13167 sym1
->name
, sym2
->name
, generic_name
, &where
);
13175 /* Worker function for resolving a generic procedure binding; this is used to
13176 resolve GENERIC as well as user and intrinsic OPERATOR typebound procedures.
13178 The difference between those cases is finding possible inherited bindings
13179 that are overridden, as one has to look for them in tb_sym_root,
13180 tb_uop_root or tb_op, respectively. Thus the caller must already find
13181 the super-type and set p->overridden correctly. */
13184 resolve_tb_generic_targets (gfc_symbol
* super_type
,
13185 gfc_typebound_proc
* p
, const char* name
)
13187 gfc_tbp_generic
* target
;
13188 gfc_symtree
* first_target
;
13189 gfc_symtree
* inherited
;
13191 gcc_assert (p
&& p
->is_generic
);
13193 /* Try to find the specific bindings for the symtrees in our target-list. */
13194 gcc_assert (p
->u
.generic
);
13195 for (target
= p
->u
.generic
; target
; target
= target
->next
)
13196 if (!target
->specific
)
13198 gfc_typebound_proc
* overridden_tbp
;
13199 gfc_tbp_generic
* g
;
13200 const char* target_name
;
13202 target_name
= target
->specific_st
->name
;
13204 /* Defined for this type directly. */
13205 if (target
->specific_st
->n
.tb
&& !target
->specific_st
->n
.tb
->error
)
13207 target
->specific
= target
->specific_st
->n
.tb
;
13208 goto specific_found
;
13211 /* Look for an inherited specific binding. */
13214 inherited
= gfc_find_typebound_proc (super_type
, NULL
, target_name
,
13219 gcc_assert (inherited
->n
.tb
);
13220 target
->specific
= inherited
->n
.tb
;
13221 goto specific_found
;
13225 gfc_error ("Undefined specific binding %qs as target of GENERIC %qs"
13226 " at %L", target_name
, name
, &p
->where
);
13229 /* Once we've found the specific binding, check it is not ambiguous with
13230 other specifics already found or inherited for the same GENERIC. */
13232 gcc_assert (target
->specific
);
13234 /* This must really be a specific binding! */
13235 if (target
->specific
->is_generic
)
13237 gfc_error ("GENERIC %qs at %L must target a specific binding,"
13238 " %qs is GENERIC, too", name
, &p
->where
, target_name
);
13242 /* Check those already resolved on this type directly. */
13243 for (g
= p
->u
.generic
; g
; g
= g
->next
)
13244 if (g
!= target
&& g
->specific
13245 && !check_generic_tbp_ambiguity (target
, g
, name
, p
->where
))
13248 /* Check for ambiguity with inherited specific targets. */
13249 for (overridden_tbp
= p
->overridden
; overridden_tbp
;
13250 overridden_tbp
= overridden_tbp
->overridden
)
13251 if (overridden_tbp
->is_generic
)
13253 for (g
= overridden_tbp
->u
.generic
; g
; g
= g
->next
)
13255 gcc_assert (g
->specific
);
13256 if (!check_generic_tbp_ambiguity (target
, g
, name
, p
->where
))
13262 /* If we attempt to "overwrite" a specific binding, this is an error. */
13263 if (p
->overridden
&& !p
->overridden
->is_generic
)
13265 gfc_error ("GENERIC %qs at %L cannot overwrite specific binding with"
13266 " the same name", name
, &p
->where
);
13270 /* Take the SUBROUTINE/FUNCTION attributes of the first specific target, as
13271 all must have the same attributes here. */
13272 first_target
= p
->u
.generic
->specific
->u
.specific
;
13273 gcc_assert (first_target
);
13274 p
->subroutine
= first_target
->n
.sym
->attr
.subroutine
;
13275 p
->function
= first_target
->n
.sym
->attr
.function
;
13281 /* Resolve a GENERIC procedure binding for a derived type. */
13284 resolve_typebound_generic (gfc_symbol
* derived
, gfc_symtree
* st
)
13286 gfc_symbol
* super_type
;
13288 /* Find the overridden binding if any. */
13289 st
->n
.tb
->overridden
= NULL
;
13290 super_type
= gfc_get_derived_super_type (derived
);
13293 gfc_symtree
* overridden
;
13294 overridden
= gfc_find_typebound_proc (super_type
, NULL
, st
->name
,
13297 if (overridden
&& overridden
->n
.tb
)
13298 st
->n
.tb
->overridden
= overridden
->n
.tb
;
13301 /* Resolve using worker function. */
13302 return resolve_tb_generic_targets (super_type
, st
->n
.tb
, st
->name
);
13306 /* Retrieve the target-procedure of an operator binding and do some checks in
13307 common for intrinsic and user-defined type-bound operators. */
13310 get_checked_tb_operator_target (gfc_tbp_generic
* target
, locus where
)
13312 gfc_symbol
* target_proc
;
13314 gcc_assert (target
->specific
&& !target
->specific
->is_generic
);
13315 target_proc
= target
->specific
->u
.specific
->n
.sym
;
13316 gcc_assert (target_proc
);
13318 /* F08:C468. All operator bindings must have a passed-object dummy argument. */
13319 if (target
->specific
->nopass
)
13321 gfc_error ("Type-bound operator at %L cannot be NOPASS", &where
);
13325 return target_proc
;
13329 /* Resolve a type-bound intrinsic operator. */
13332 resolve_typebound_intrinsic_op (gfc_symbol
* derived
, gfc_intrinsic_op op
,
13333 gfc_typebound_proc
* p
)
13335 gfc_symbol
* super_type
;
13336 gfc_tbp_generic
* target
;
13338 /* If there's already an error here, do nothing (but don't fail again). */
13342 /* Operators should always be GENERIC bindings. */
13343 gcc_assert (p
->is_generic
);
13345 /* Look for an overridden binding. */
13346 super_type
= gfc_get_derived_super_type (derived
);
13347 if (super_type
&& super_type
->f2k_derived
)
13348 p
->overridden
= gfc_find_typebound_intrinsic_op (super_type
, NULL
,
13351 p
->overridden
= NULL
;
13353 /* Resolve general GENERIC properties using worker function. */
13354 if (!resolve_tb_generic_targets (super_type
, p
, gfc_op2string(op
)))
13357 /* Check the targets to be procedures of correct interface. */
13358 for (target
= p
->u
.generic
; target
; target
= target
->next
)
13360 gfc_symbol
* target_proc
;
13362 target_proc
= get_checked_tb_operator_target (target
, p
->where
);
13366 if (!gfc_check_operator_interface (target_proc
, op
, p
->where
))
13369 /* Add target to non-typebound operator list. */
13370 if (!target
->specific
->deferred
&& !derived
->attr
.use_assoc
13371 && p
->access
!= ACCESS_PRIVATE
&& derived
->ns
== gfc_current_ns
)
13373 gfc_interface
*head
, *intr
;
13375 /* Preempt 'gfc_check_new_interface' for submodules, where the
13376 mechanism for handling module procedures winds up resolving
13377 operator interfaces twice and would otherwise cause an error. */
13378 for (intr
= derived
->ns
->op
[op
]; intr
; intr
= intr
->next
)
13379 if (intr
->sym
== target_proc
13380 && target_proc
->attr
.used_in_submodule
)
13383 if (!gfc_check_new_interface (derived
->ns
->op
[op
],
13384 target_proc
, p
->where
))
13386 head
= derived
->ns
->op
[op
];
13387 intr
= gfc_get_interface ();
13388 intr
->sym
= target_proc
;
13389 intr
->where
= p
->where
;
13391 derived
->ns
->op
[op
] = intr
;
13403 /* Resolve a type-bound user operator (tree-walker callback). */
13405 static gfc_symbol
* resolve_bindings_derived
;
13406 static bool resolve_bindings_result
;
13408 static bool check_uop_procedure (gfc_symbol
* sym
, locus where
);
13411 resolve_typebound_user_op (gfc_symtree
* stree
)
13413 gfc_symbol
* super_type
;
13414 gfc_tbp_generic
* target
;
13416 gcc_assert (stree
&& stree
->n
.tb
);
13418 if (stree
->n
.tb
->error
)
13421 /* Operators should always be GENERIC bindings. */
13422 gcc_assert (stree
->n
.tb
->is_generic
);
13424 /* Find overridden procedure, if any. */
13425 super_type
= gfc_get_derived_super_type (resolve_bindings_derived
);
13426 if (super_type
&& super_type
->f2k_derived
)
13428 gfc_symtree
* overridden
;
13429 overridden
= gfc_find_typebound_user_op (super_type
, NULL
,
13430 stree
->name
, true, NULL
);
13432 if (overridden
&& overridden
->n
.tb
)
13433 stree
->n
.tb
->overridden
= overridden
->n
.tb
;
13436 stree
->n
.tb
->overridden
= NULL
;
13438 /* Resolve basically using worker function. */
13439 if (!resolve_tb_generic_targets (super_type
, stree
->n
.tb
, stree
->name
))
13442 /* Check the targets to be functions of correct interface. */
13443 for (target
= stree
->n
.tb
->u
.generic
; target
; target
= target
->next
)
13445 gfc_symbol
* target_proc
;
13447 target_proc
= get_checked_tb_operator_target (target
, stree
->n
.tb
->where
);
13451 if (!check_uop_procedure (target_proc
, stree
->n
.tb
->where
))
13458 resolve_bindings_result
= false;
13459 stree
->n
.tb
->error
= 1;
13463 /* Resolve the type-bound procedures for a derived type. */
13466 resolve_typebound_procedure (gfc_symtree
* stree
)
13470 gfc_symbol
* me_arg
;
13471 gfc_symbol
* super_type
;
13472 gfc_component
* comp
;
13474 gcc_assert (stree
);
13476 /* Undefined specific symbol from GENERIC target definition. */
13480 if (stree
->n
.tb
->error
)
13483 /* If this is a GENERIC binding, use that routine. */
13484 if (stree
->n
.tb
->is_generic
)
13486 if (!resolve_typebound_generic (resolve_bindings_derived
, stree
))
13491 /* Get the target-procedure to check it. */
13492 gcc_assert (!stree
->n
.tb
->is_generic
);
13493 gcc_assert (stree
->n
.tb
->u
.specific
);
13494 proc
= stree
->n
.tb
->u
.specific
->n
.sym
;
13495 where
= stree
->n
.tb
->where
;
13497 /* Default access should already be resolved from the parser. */
13498 gcc_assert (stree
->n
.tb
->access
!= ACCESS_UNKNOWN
);
13500 if (stree
->n
.tb
->deferred
)
13502 if (!check_proc_interface (proc
, &where
))
13507 /* Check for F08:C465. */
13508 if ((!proc
->attr
.subroutine
&& !proc
->attr
.function
)
13509 || (proc
->attr
.proc
!= PROC_MODULE
13510 && proc
->attr
.if_source
!= IFSRC_IFBODY
)
13511 || proc
->attr
.abstract
)
13513 gfc_error ("%qs must be a module procedure or an external procedure with"
13514 " an explicit interface at %L", proc
->name
, &where
);
13519 stree
->n
.tb
->subroutine
= proc
->attr
.subroutine
;
13520 stree
->n
.tb
->function
= proc
->attr
.function
;
13522 /* Find the super-type of the current derived type. We could do this once and
13523 store in a global if speed is needed, but as long as not I believe this is
13524 more readable and clearer. */
13525 super_type
= gfc_get_derived_super_type (resolve_bindings_derived
);
13527 /* If PASS, resolve and check arguments if not already resolved / loaded
13528 from a .mod file. */
13529 if (!stree
->n
.tb
->nopass
&& stree
->n
.tb
->pass_arg_num
== 0)
13531 gfc_formal_arglist
*dummy_args
;
13533 dummy_args
= gfc_sym_get_dummy_args (proc
);
13534 if (stree
->n
.tb
->pass_arg
)
13536 gfc_formal_arglist
*i
;
13538 /* If an explicit passing argument name is given, walk the arg-list
13539 and look for it. */
13542 stree
->n
.tb
->pass_arg_num
= 1;
13543 for (i
= dummy_args
; i
; i
= i
->next
)
13545 if (!strcmp (i
->sym
->name
, stree
->n
.tb
->pass_arg
))
13550 ++stree
->n
.tb
->pass_arg_num
;
13555 gfc_error ("Procedure %qs with PASS(%s) at %L has no"
13557 proc
->name
, stree
->n
.tb
->pass_arg
, &where
,
13558 stree
->n
.tb
->pass_arg
);
13564 /* Otherwise, take the first one; there should in fact be at least
13566 stree
->n
.tb
->pass_arg_num
= 1;
13569 gfc_error ("Procedure %qs with PASS at %L must have at"
13570 " least one argument", proc
->name
, &where
);
13573 me_arg
= dummy_args
->sym
;
13576 /* Now check that the argument-type matches and the passed-object
13577 dummy argument is generally fine. */
13579 gcc_assert (me_arg
);
13581 if (me_arg
->ts
.type
!= BT_CLASS
)
13583 gfc_error ("Non-polymorphic passed-object dummy argument of %qs"
13584 " at %L", proc
->name
, &where
);
13588 if (CLASS_DATA (me_arg
)->ts
.u
.derived
13589 != resolve_bindings_derived
)
13591 gfc_error ("Argument %qs of %qs with PASS(%s) at %L must be of"
13592 " the derived-type %qs", me_arg
->name
, proc
->name
,
13593 me_arg
->name
, &where
, resolve_bindings_derived
->name
);
13597 gcc_assert (me_arg
->ts
.type
== BT_CLASS
);
13598 if (CLASS_DATA (me_arg
)->as
&& CLASS_DATA (me_arg
)->as
->rank
!= 0)
13600 gfc_error ("Passed-object dummy argument of %qs at %L must be"
13601 " scalar", proc
->name
, &where
);
13604 if (CLASS_DATA (me_arg
)->attr
.allocatable
)
13606 gfc_error ("Passed-object dummy argument of %qs at %L must not"
13607 " be ALLOCATABLE", proc
->name
, &where
);
13610 if (CLASS_DATA (me_arg
)->attr
.class_pointer
)
13612 gfc_error ("Passed-object dummy argument of %qs at %L must not"
13613 " be POINTER", proc
->name
, &where
);
13618 /* If we are extending some type, check that we don't override a procedure
13619 flagged NON_OVERRIDABLE. */
13620 stree
->n
.tb
->overridden
= NULL
;
13623 gfc_symtree
* overridden
;
13624 overridden
= gfc_find_typebound_proc (super_type
, NULL
,
13625 stree
->name
, true, NULL
);
13629 if (overridden
->n
.tb
)
13630 stree
->n
.tb
->overridden
= overridden
->n
.tb
;
13632 if (!gfc_check_typebound_override (stree
, overridden
))
13637 /* See if there's a name collision with a component directly in this type. */
13638 for (comp
= resolve_bindings_derived
->components
; comp
; comp
= comp
->next
)
13639 if (!strcmp (comp
->name
, stree
->name
))
13641 gfc_error ("Procedure %qs at %L has the same name as a component of"
13643 stree
->name
, &where
, resolve_bindings_derived
->name
);
13647 /* Try to find a name collision with an inherited component. */
13648 if (super_type
&& gfc_find_component (super_type
, stree
->name
, true, true,
13651 gfc_error ("Procedure %qs at %L has the same name as an inherited"
13652 " component of %qs",
13653 stree
->name
, &where
, resolve_bindings_derived
->name
);
13657 stree
->n
.tb
->error
= 0;
13661 resolve_bindings_result
= false;
13662 stree
->n
.tb
->error
= 1;
13667 resolve_typebound_procedures (gfc_symbol
* derived
)
13670 gfc_symbol
* super_type
;
13672 if (!derived
->f2k_derived
|| !derived
->f2k_derived
->tb_sym_root
)
13675 super_type
= gfc_get_derived_super_type (derived
);
13677 resolve_symbol (super_type
);
13679 resolve_bindings_derived
= derived
;
13680 resolve_bindings_result
= true;
13682 if (derived
->f2k_derived
->tb_sym_root
)
13683 gfc_traverse_symtree (derived
->f2k_derived
->tb_sym_root
,
13684 &resolve_typebound_procedure
);
13686 if (derived
->f2k_derived
->tb_uop_root
)
13687 gfc_traverse_symtree (derived
->f2k_derived
->tb_uop_root
,
13688 &resolve_typebound_user_op
);
13690 for (op
= 0; op
!= GFC_INTRINSIC_OPS
; ++op
)
13692 gfc_typebound_proc
* p
= derived
->f2k_derived
->tb_op
[op
];
13693 if (p
&& !resolve_typebound_intrinsic_op (derived
,
13694 (gfc_intrinsic_op
)op
, p
))
13695 resolve_bindings_result
= false;
13698 return resolve_bindings_result
;
13702 /* Add a derived type to the dt_list. The dt_list is used in trans-types.c
13703 to give all identical derived types the same backend_decl. */
13705 add_dt_to_dt_list (gfc_symbol
*derived
)
13707 if (!derived
->dt_next
)
13709 if (gfc_derived_types
)
13711 derived
->dt_next
= gfc_derived_types
->dt_next
;
13712 gfc_derived_types
->dt_next
= derived
;
13716 derived
->dt_next
= derived
;
13718 gfc_derived_types
= derived
;
13723 /* Ensure that a derived-type is really not abstract, meaning that every
13724 inherited DEFERRED binding is overridden by a non-DEFERRED one. */
13727 ensure_not_abstract_walker (gfc_symbol
* sub
, gfc_symtree
* st
)
13732 if (!ensure_not_abstract_walker (sub
, st
->left
))
13734 if (!ensure_not_abstract_walker (sub
, st
->right
))
13737 if (st
->n
.tb
&& st
->n
.tb
->deferred
)
13739 gfc_symtree
* overriding
;
13740 overriding
= gfc_find_typebound_proc (sub
, NULL
, st
->name
, true, NULL
);
13743 gcc_assert (overriding
->n
.tb
);
13744 if (overriding
->n
.tb
->deferred
)
13746 gfc_error ("Derived-type %qs declared at %L must be ABSTRACT because"
13747 " %qs is DEFERRED and not overridden",
13748 sub
->name
, &sub
->declared_at
, st
->name
);
13757 ensure_not_abstract (gfc_symbol
* sub
, gfc_symbol
* ancestor
)
13759 /* The algorithm used here is to recursively travel up the ancestry of sub
13760 and for each ancestor-type, check all bindings. If any of them is
13761 DEFERRED, look it up starting from sub and see if the found (overriding)
13762 binding is not DEFERRED.
13763 This is not the most efficient way to do this, but it should be ok and is
13764 clearer than something sophisticated. */
13766 gcc_assert (ancestor
&& !sub
->attr
.abstract
);
13768 if (!ancestor
->attr
.abstract
)
13771 /* Walk bindings of this ancestor. */
13772 if (ancestor
->f2k_derived
)
13775 t
= ensure_not_abstract_walker (sub
, ancestor
->f2k_derived
->tb_sym_root
);
13780 /* Find next ancestor type and recurse on it. */
13781 ancestor
= gfc_get_derived_super_type (ancestor
);
13783 return ensure_not_abstract (sub
, ancestor
);
13789 /* This check for typebound defined assignments is done recursively
13790 since the order in which derived types are resolved is not always in
13791 order of the declarations. */
13794 check_defined_assignments (gfc_symbol
*derived
)
13798 for (c
= derived
->components
; c
; c
= c
->next
)
13800 if (!gfc_bt_struct (c
->ts
.type
)
13802 || c
->attr
.allocatable
13803 || c
->attr
.proc_pointer_comp
13804 || c
->attr
.class_pointer
13805 || c
->attr
.proc_pointer
)
13808 if (c
->ts
.u
.derived
->attr
.defined_assign_comp
13809 || (c
->ts
.u
.derived
->f2k_derived
13810 && c
->ts
.u
.derived
->f2k_derived
->tb_op
[INTRINSIC_ASSIGN
]))
13812 derived
->attr
.defined_assign_comp
= 1;
13816 check_defined_assignments (c
->ts
.u
.derived
);
13817 if (c
->ts
.u
.derived
->attr
.defined_assign_comp
)
13819 derived
->attr
.defined_assign_comp
= 1;
13826 /* Resolve a single component of a derived type or structure. */
13829 resolve_component (gfc_component
*c
, gfc_symbol
*sym
)
13831 gfc_symbol
*super_type
;
13832 symbol_attribute
*attr
;
13834 if (c
->attr
.artificial
)
13837 /* Do not allow vtype components to be resolved in nameless namespaces
13838 such as block data because the procedure pointers will cause ICEs
13839 and vtables are not needed in these contexts. */
13840 if (sym
->attr
.vtype
&& sym
->attr
.use_assoc
13841 && sym
->ns
->proc_name
== NULL
)
13845 if ((!sym
->attr
.is_class
|| c
!= sym
->components
)
13846 && c
->attr
.codimension
13847 && (!c
->attr
.allocatable
|| (c
->as
&& c
->as
->type
!= AS_DEFERRED
)))
13849 gfc_error ("Coarray component %qs at %L must be allocatable with "
13850 "deferred shape", c
->name
, &c
->loc
);
13855 if (c
->attr
.codimension
&& c
->ts
.type
== BT_DERIVED
13856 && c
->ts
.u
.derived
->ts
.is_iso_c
)
13858 gfc_error ("Component %qs at %L of TYPE(C_PTR) or TYPE(C_FUNPTR) "
13859 "shall not be a coarray", c
->name
, &c
->loc
);
13864 if (gfc_bt_struct (c
->ts
.type
) && c
->ts
.u
.derived
->attr
.coarray_comp
13865 && (c
->attr
.codimension
|| c
->attr
.pointer
|| c
->attr
.dimension
13866 || c
->attr
.allocatable
))
13868 gfc_error ("Component %qs at %L with coarray component "
13869 "shall be a nonpointer, nonallocatable scalar",
13875 if (c
->ts
.type
== BT_CLASS
)
13877 if (CLASS_DATA (c
))
13879 attr
= &(CLASS_DATA (c
)->attr
);
13881 /* Fix up contiguous attribute. */
13882 if (c
->attr
.contiguous
)
13883 attr
->contiguous
= 1;
13891 if (attr
&& attr
->contiguous
&& (!attr
->dimension
|| !attr
->pointer
))
13893 gfc_error ("Component %qs at %L has the CONTIGUOUS attribute but "
13894 "is not an array pointer", c
->name
, &c
->loc
);
13898 /* F2003, 15.2.1 - length has to be one. */
13899 if (sym
->attr
.is_bind_c
&& c
->ts
.type
== BT_CHARACTER
13900 && (c
->ts
.u
.cl
== NULL
|| c
->ts
.u
.cl
->length
== NULL
13901 || !gfc_is_constant_expr (c
->ts
.u
.cl
->length
)
13902 || mpz_cmp_si (c
->ts
.u
.cl
->length
->value
.integer
, 1) != 0))
13904 gfc_error ("Component %qs of BIND(C) type at %L must have length one",
13909 if (c
->attr
.proc_pointer
&& c
->ts
.interface
)
13911 gfc_symbol
*ifc
= c
->ts
.interface
;
13913 if (!sym
->attr
.vtype
&& !check_proc_interface (ifc
, &c
->loc
))
13919 if (ifc
->attr
.if_source
|| ifc
->attr
.intrinsic
)
13921 /* Resolve interface and copy attributes. */
13922 if (ifc
->formal
&& !ifc
->formal_ns
)
13923 resolve_symbol (ifc
);
13924 if (ifc
->attr
.intrinsic
)
13925 gfc_resolve_intrinsic (ifc
, &ifc
->declared_at
);
13929 c
->ts
= ifc
->result
->ts
;
13930 c
->attr
.allocatable
= ifc
->result
->attr
.allocatable
;
13931 c
->attr
.pointer
= ifc
->result
->attr
.pointer
;
13932 c
->attr
.dimension
= ifc
->result
->attr
.dimension
;
13933 c
->as
= gfc_copy_array_spec (ifc
->result
->as
);
13934 c
->attr
.class_ok
= ifc
->result
->attr
.class_ok
;
13939 c
->attr
.allocatable
= ifc
->attr
.allocatable
;
13940 c
->attr
.pointer
= ifc
->attr
.pointer
;
13941 c
->attr
.dimension
= ifc
->attr
.dimension
;
13942 c
->as
= gfc_copy_array_spec (ifc
->as
);
13943 c
->attr
.class_ok
= ifc
->attr
.class_ok
;
13945 c
->ts
.interface
= ifc
;
13946 c
->attr
.function
= ifc
->attr
.function
;
13947 c
->attr
.subroutine
= ifc
->attr
.subroutine
;
13949 c
->attr
.pure
= ifc
->attr
.pure
;
13950 c
->attr
.elemental
= ifc
->attr
.elemental
;
13951 c
->attr
.recursive
= ifc
->attr
.recursive
;
13952 c
->attr
.always_explicit
= ifc
->attr
.always_explicit
;
13953 c
->attr
.ext_attr
|= ifc
->attr
.ext_attr
;
13954 /* Copy char length. */
13955 if (ifc
->ts
.type
== BT_CHARACTER
&& ifc
->ts
.u
.cl
)
13957 gfc_charlen
*cl
= gfc_new_charlen (sym
->ns
, ifc
->ts
.u
.cl
);
13958 if (cl
->length
&& !cl
->resolved
13959 && !gfc_resolve_expr (cl
->length
))
13968 else if (c
->attr
.proc_pointer
&& c
->ts
.type
== BT_UNKNOWN
)
13970 /* Since PPCs are not implicitly typed, a PPC without an explicit
13971 interface must be a subroutine. */
13972 gfc_add_subroutine (&c
->attr
, c
->name
, &c
->loc
);
13975 /* Procedure pointer components: Check PASS arg. */
13976 if (c
->attr
.proc_pointer
&& !c
->tb
->nopass
&& c
->tb
->pass_arg_num
== 0
13977 && !sym
->attr
.vtype
)
13979 gfc_symbol
* me_arg
;
13981 if (c
->tb
->pass_arg
)
13983 gfc_formal_arglist
* i
;
13985 /* If an explicit passing argument name is given, walk the arg-list
13986 and look for it. */
13989 c
->tb
->pass_arg_num
= 1;
13990 for (i
= c
->ts
.interface
->formal
; i
; i
= i
->next
)
13992 if (!strcmp (i
->sym
->name
, c
->tb
->pass_arg
))
13997 c
->tb
->pass_arg_num
++;
14002 gfc_error ("Procedure pointer component %qs with PASS(%s) "
14003 "at %L has no argument %qs", c
->name
,
14004 c
->tb
->pass_arg
, &c
->loc
, c
->tb
->pass_arg
);
14011 /* Otherwise, take the first one; there should in fact be at least
14013 c
->tb
->pass_arg_num
= 1;
14014 if (!c
->ts
.interface
->formal
)
14016 gfc_error ("Procedure pointer component %qs with PASS at %L "
14017 "must have at least one argument",
14022 me_arg
= c
->ts
.interface
->formal
->sym
;
14025 /* Now check that the argument-type matches. */
14026 gcc_assert (me_arg
);
14027 if ((me_arg
->ts
.type
!= BT_DERIVED
&& me_arg
->ts
.type
!= BT_CLASS
)
14028 || (me_arg
->ts
.type
== BT_DERIVED
&& me_arg
->ts
.u
.derived
!= sym
)
14029 || (me_arg
->ts
.type
== BT_CLASS
14030 && CLASS_DATA (me_arg
)->ts
.u
.derived
!= sym
))
14032 gfc_error ("Argument %qs of %qs with PASS(%s) at %L must be of"
14033 " the derived type %qs", me_arg
->name
, c
->name
,
14034 me_arg
->name
, &c
->loc
, sym
->name
);
14039 /* Check for F03:C453. */
14040 if (CLASS_DATA (me_arg
)->attr
.dimension
)
14042 gfc_error ("Argument %qs of %qs with PASS(%s) at %L "
14043 "must be scalar", me_arg
->name
, c
->name
, me_arg
->name
,
14049 if (CLASS_DATA (me_arg
)->attr
.class_pointer
)
14051 gfc_error ("Argument %qs of %qs with PASS(%s) at %L "
14052 "may not have the POINTER attribute", me_arg
->name
,
14053 c
->name
, me_arg
->name
, &c
->loc
);
14058 if (CLASS_DATA (me_arg
)->attr
.allocatable
)
14060 gfc_error ("Argument %qs of %qs with PASS(%s) at %L "
14061 "may not be ALLOCATABLE", me_arg
->name
, c
->name
,
14062 me_arg
->name
, &c
->loc
);
14067 if (gfc_type_is_extensible (sym
) && me_arg
->ts
.type
!= BT_CLASS
)
14069 gfc_error ("Non-polymorphic passed-object dummy argument of %qs"
14070 " at %L", c
->name
, &c
->loc
);
14076 /* Check type-spec if this is not the parent-type component. */
14077 if (((sym
->attr
.is_class
14078 && (!sym
->components
->ts
.u
.derived
->attr
.extension
14079 || c
!= sym
->components
->ts
.u
.derived
->components
))
14080 || (!sym
->attr
.is_class
14081 && (!sym
->attr
.extension
|| c
!= sym
->components
)))
14082 && !sym
->attr
.vtype
14083 && !resolve_typespec_used (&c
->ts
, &c
->loc
, c
->name
))
14086 super_type
= gfc_get_derived_super_type (sym
);
14088 /* If this type is an extension, set the accessibility of the parent
14091 && ((sym
->attr
.is_class
14092 && c
== sym
->components
->ts
.u
.derived
->components
)
14093 || (!sym
->attr
.is_class
&& c
== sym
->components
))
14094 && strcmp (super_type
->name
, c
->name
) == 0)
14095 c
->attr
.access
= super_type
->attr
.access
;
14097 /* If this type is an extension, see if this component has the same name
14098 as an inherited type-bound procedure. */
14099 if (super_type
&& !sym
->attr
.is_class
14100 && gfc_find_typebound_proc (super_type
, NULL
, c
->name
, true, NULL
))
14102 gfc_error ("Component %qs of %qs at %L has the same name as an"
14103 " inherited type-bound procedure",
14104 c
->name
, sym
->name
, &c
->loc
);
14108 if (c
->ts
.type
== BT_CHARACTER
&& !c
->attr
.proc_pointer
14109 && !c
->ts
.deferred
)
14111 if (c
->ts
.u
.cl
->length
== NULL
14112 || (!resolve_charlen(c
->ts
.u
.cl
))
14113 || !gfc_is_constant_expr (c
->ts
.u
.cl
->length
))
14115 gfc_error ("Character length of component %qs needs to "
14116 "be a constant specification expression at %L",
14118 c
->ts
.u
.cl
->length
? &c
->ts
.u
.cl
->length
->where
: &c
->loc
);
14123 if (c
->ts
.type
== BT_CHARACTER
&& c
->ts
.deferred
14124 && !c
->attr
.pointer
&& !c
->attr
.allocatable
)
14126 gfc_error ("Character component %qs of %qs at %L with deferred "
14127 "length must be a POINTER or ALLOCATABLE",
14128 c
->name
, sym
->name
, &c
->loc
);
14132 /* Add the hidden deferred length field. */
14133 if (c
->ts
.type
== BT_CHARACTER
14134 && (c
->ts
.deferred
|| c
->attr
.pdt_string
)
14135 && !c
->attr
.function
14136 && !sym
->attr
.is_class
)
14138 char name
[GFC_MAX_SYMBOL_LEN
+9];
14139 gfc_component
*strlen
;
14140 sprintf (name
, "_%s_length", c
->name
);
14141 strlen
= gfc_find_component (sym
, name
, true, true, NULL
);
14142 if (strlen
== NULL
)
14144 if (!gfc_add_component (sym
, name
, &strlen
))
14146 strlen
->ts
.type
= BT_INTEGER
;
14147 strlen
->ts
.kind
= gfc_charlen_int_kind
;
14148 strlen
->attr
.access
= ACCESS_PRIVATE
;
14149 strlen
->attr
.artificial
= 1;
14153 if (c
->ts
.type
== BT_DERIVED
14154 && sym
->component_access
!= ACCESS_PRIVATE
14155 && gfc_check_symbol_access (sym
)
14156 && !is_sym_host_assoc (c
->ts
.u
.derived
, sym
->ns
)
14157 && !c
->ts
.u
.derived
->attr
.use_assoc
14158 && !gfc_check_symbol_access (c
->ts
.u
.derived
)
14159 && !gfc_notify_std (GFC_STD_F2003
, "the component %qs is a "
14160 "PRIVATE type and cannot be a component of "
14161 "%qs, which is PUBLIC at %L", c
->name
,
14162 sym
->name
, &sym
->declared_at
))
14165 if ((sym
->attr
.sequence
|| sym
->attr
.is_bind_c
) && c
->ts
.type
== BT_CLASS
)
14167 gfc_error ("Polymorphic component %s at %L in SEQUENCE or BIND(C) "
14168 "type %s", c
->name
, &c
->loc
, sym
->name
);
14172 if (sym
->attr
.sequence
)
14174 if (c
->ts
.type
== BT_DERIVED
&& c
->ts
.u
.derived
->attr
.sequence
== 0)
14176 gfc_error ("Component %s of SEQUENCE type declared at %L does "
14177 "not have the SEQUENCE attribute",
14178 c
->ts
.u
.derived
->name
, &sym
->declared_at
);
14183 if (c
->ts
.type
== BT_DERIVED
&& c
->ts
.u
.derived
->attr
.generic
)
14184 c
->ts
.u
.derived
= gfc_find_dt_in_generic (c
->ts
.u
.derived
);
14185 else if (c
->ts
.type
== BT_CLASS
&& c
->attr
.class_ok
14186 && CLASS_DATA (c
)->ts
.u
.derived
->attr
.generic
)
14187 CLASS_DATA (c
)->ts
.u
.derived
14188 = gfc_find_dt_in_generic (CLASS_DATA (c
)->ts
.u
.derived
);
14190 /* If an allocatable component derived type is of the same type as
14191 the enclosing derived type, we need a vtable generating so that
14192 the __deallocate procedure is created. */
14193 if ((c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
14194 && c
->ts
.u
.derived
== sym
&& c
->attr
.allocatable
== 1)
14195 gfc_find_vtab (&c
->ts
);
14197 /* Ensure that all the derived type components are put on the
14198 derived type list; even in formal namespaces, where derived type
14199 pointer components might not have been declared. */
14200 if (c
->ts
.type
== BT_DERIVED
14202 && c
->ts
.u
.derived
->components
14204 && sym
!= c
->ts
.u
.derived
)
14205 add_dt_to_dt_list (c
->ts
.u
.derived
);
14207 if (!gfc_resolve_array_spec (c
->as
,
14208 !(c
->attr
.pointer
|| c
->attr
.proc_pointer
14209 || c
->attr
.allocatable
)))
14212 if (c
->initializer
&& !sym
->attr
.vtype
14213 && !c
->attr
.pdt_kind
&& !c
->attr
.pdt_len
14214 && !gfc_check_assign_symbol (sym
, c
, c
->initializer
))
14221 /* Be nice about the locus for a structure expression - show the locus of the
14222 first non-null sub-expression if we can. */
14225 cons_where (gfc_expr
*struct_expr
)
14227 gfc_constructor
*cons
;
14229 gcc_assert (struct_expr
&& struct_expr
->expr_type
== EXPR_STRUCTURE
);
14231 cons
= gfc_constructor_first (struct_expr
->value
.constructor
);
14232 for (; cons
; cons
= gfc_constructor_next (cons
))
14234 if (cons
->expr
&& cons
->expr
->expr_type
!= EXPR_NULL
)
14235 return &cons
->expr
->where
;
14238 return &struct_expr
->where
;
14241 /* Resolve the components of a structure type. Much less work than derived
14245 resolve_fl_struct (gfc_symbol
*sym
)
14248 gfc_expr
*init
= NULL
;
14251 /* Make sure UNIONs do not have overlapping initializers. */
14252 if (sym
->attr
.flavor
== FL_UNION
)
14254 for (c
= sym
->components
; c
; c
= c
->next
)
14256 if (init
&& c
->initializer
)
14258 gfc_error ("Conflicting initializers in union at %L and %L",
14259 cons_where (init
), cons_where (c
->initializer
));
14260 gfc_free_expr (c
->initializer
);
14261 c
->initializer
= NULL
;
14264 init
= c
->initializer
;
14269 for (c
= sym
->components
; c
; c
= c
->next
)
14270 if (!resolve_component (c
, sym
))
14276 if (sym
->components
)
14277 add_dt_to_dt_list (sym
);
14283 /* Resolve the components of a derived type. This does not have to wait until
14284 resolution stage, but can be done as soon as the dt declaration has been
14288 resolve_fl_derived0 (gfc_symbol
*sym
)
14290 gfc_symbol
* super_type
;
14292 gfc_formal_arglist
*f
;
14295 if (sym
->attr
.unlimited_polymorphic
)
14298 super_type
= gfc_get_derived_super_type (sym
);
14301 if (super_type
&& sym
->attr
.coarray_comp
&& !super_type
->attr
.coarray_comp
)
14303 gfc_error ("As extending type %qs at %L has a coarray component, "
14304 "parent type %qs shall also have one", sym
->name
,
14305 &sym
->declared_at
, super_type
->name
);
14309 /* Ensure the extended type gets resolved before we do. */
14310 if (super_type
&& !resolve_fl_derived0 (super_type
))
14313 /* An ABSTRACT type must be extensible. */
14314 if (sym
->attr
.abstract
&& !gfc_type_is_extensible (sym
))
14316 gfc_error ("Non-extensible derived-type %qs at %L must not be ABSTRACT",
14317 sym
->name
, &sym
->declared_at
);
14321 c
= (sym
->attr
.is_class
) ? sym
->components
->ts
.u
.derived
->components
14325 for ( ; c
!= NULL
; c
= c
->next
)
14326 if (!resolve_component (c
, sym
))
14332 /* Now add the caf token field, where needed. */
14333 if (flag_coarray
!= GFC_FCOARRAY_NONE
14334 && !sym
->attr
.is_class
&& !sym
->attr
.vtype
)
14336 for (c
= sym
->components
; c
; c
= c
->next
)
14337 if (!c
->attr
.dimension
&& !c
->attr
.codimension
14338 && (c
->attr
.allocatable
|| c
->attr
.pointer
))
14340 char name
[GFC_MAX_SYMBOL_LEN
+9];
14341 gfc_component
*token
;
14342 sprintf (name
, "_caf_%s", c
->name
);
14343 token
= gfc_find_component (sym
, name
, true, true, NULL
);
14346 if (!gfc_add_component (sym
, name
, &token
))
14348 token
->ts
.type
= BT_VOID
;
14349 token
->ts
.kind
= gfc_default_integer_kind
;
14350 token
->attr
.access
= ACCESS_PRIVATE
;
14351 token
->attr
.artificial
= 1;
14352 token
->attr
.caf_token
= 1;
14357 check_defined_assignments (sym
);
14359 if (!sym
->attr
.defined_assign_comp
&& super_type
)
14360 sym
->attr
.defined_assign_comp
14361 = super_type
->attr
.defined_assign_comp
;
14363 /* If this is a non-ABSTRACT type extending an ABSTRACT one, ensure that
14364 all DEFERRED bindings are overridden. */
14365 if (super_type
&& super_type
->attr
.abstract
&& !sym
->attr
.abstract
14366 && !sym
->attr
.is_class
14367 && !ensure_not_abstract (sym
, super_type
))
14370 /* Check that there is a component for every PDT parameter. */
14371 if (sym
->attr
.pdt_template
)
14373 for (f
= sym
->formal
; f
; f
= f
->next
)
14377 c
= gfc_find_component (sym
, f
->sym
->name
, true, true, NULL
);
14380 gfc_error ("Parameterized type %qs does not have a component "
14381 "corresponding to parameter %qs at %L", sym
->name
,
14382 f
->sym
->name
, &sym
->declared_at
);
14388 /* Add derived type to the derived type list. */
14389 add_dt_to_dt_list (sym
);
14395 /* The following procedure does the full resolution of a derived type,
14396 including resolution of all type-bound procedures (if present). In contrast
14397 to 'resolve_fl_derived0' this can only be done after the module has been
14398 parsed completely. */
14401 resolve_fl_derived (gfc_symbol
*sym
)
14403 gfc_symbol
*gen_dt
= NULL
;
14405 if (sym
->attr
.unlimited_polymorphic
)
14408 if (!sym
->attr
.is_class
)
14409 gfc_find_symbol (sym
->name
, sym
->ns
, 0, &gen_dt
);
14410 if (gen_dt
&& gen_dt
->generic
&& gen_dt
->generic
->next
14411 && (!gen_dt
->generic
->sym
->attr
.use_assoc
14412 || gen_dt
->generic
->sym
->module
!= gen_dt
->generic
->next
->sym
->module
)
14413 && !gfc_notify_std (GFC_STD_F2003
, "Generic name %qs of function "
14414 "%qs at %L being the same name as derived "
14415 "type at %L", sym
->name
,
14416 gen_dt
->generic
->sym
== sym
14417 ? gen_dt
->generic
->next
->sym
->name
14418 : gen_dt
->generic
->sym
->name
,
14419 gen_dt
->generic
->sym
== sym
14420 ? &gen_dt
->generic
->next
->sym
->declared_at
14421 : &gen_dt
->generic
->sym
->declared_at
,
14422 &sym
->declared_at
))
14425 if (sym
->components
== NULL
&& !sym
->attr
.zero_comp
&& !sym
->attr
.use_assoc
)
14427 gfc_error ("Derived type %qs at %L has not been declared",
14428 sym
->name
, &sym
->declared_at
);
14432 /* Resolve the finalizer procedures. */
14433 if (!gfc_resolve_finalizers (sym
, NULL
))
14436 if (sym
->attr
.is_class
&& sym
->ts
.u
.derived
== NULL
)
14438 /* Fix up incomplete CLASS symbols. */
14439 gfc_component
*data
= gfc_find_component (sym
, "_data", true, true, NULL
);
14440 gfc_component
*vptr
= gfc_find_component (sym
, "_vptr", true, true, NULL
);
14442 /* Nothing more to do for unlimited polymorphic entities. */
14443 if (data
->ts
.u
.derived
->attr
.unlimited_polymorphic
)
14445 else if (vptr
->ts
.u
.derived
== NULL
)
14447 gfc_symbol
*vtab
= gfc_find_derived_vtab (data
->ts
.u
.derived
);
14449 vptr
->ts
.u
.derived
= vtab
->ts
.u
.derived
;
14450 if (!resolve_fl_derived0 (vptr
->ts
.u
.derived
))
14455 if (!resolve_fl_derived0 (sym
))
14458 /* Resolve the type-bound procedures. */
14459 if (!resolve_typebound_procedures (sym
))
14462 /* Generate module vtables subject to their accessibility and their not
14463 being vtables or pdt templates. If this is not done class declarations
14464 in external procedures wind up with their own version and so SELECT TYPE
14465 fails because the vptrs do not have the same address. */
14466 if (gfc_option
.allow_std
& GFC_STD_F2003
14467 && sym
->ns
->proc_name
14468 && sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
14469 && sym
->attr
.access
!= ACCESS_PRIVATE
14470 && !(sym
->attr
.use_assoc
|| sym
->attr
.vtype
|| sym
->attr
.pdt_template
))
14472 gfc_symbol
*vtab
= gfc_find_derived_vtab (sym
);
14473 gfc_set_sym_referenced (vtab
);
14481 resolve_fl_namelist (gfc_symbol
*sym
)
14486 for (nl
= sym
->namelist
; nl
; nl
= nl
->next
)
14488 /* Check again, the check in match only works if NAMELIST comes
14490 if (nl
->sym
->as
&& nl
->sym
->as
->type
== AS_ASSUMED_SIZE
)
14492 gfc_error ("Assumed size array %qs in namelist %qs at %L is not "
14493 "allowed", nl
->sym
->name
, sym
->name
, &sym
->declared_at
);
14497 if (nl
->sym
->as
&& nl
->sym
->as
->type
== AS_ASSUMED_SHAPE
14498 && !gfc_notify_std (GFC_STD_F2003
, "NAMELIST array object %qs "
14499 "with assumed shape in namelist %qs at %L",
14500 nl
->sym
->name
, sym
->name
, &sym
->declared_at
))
14503 if (is_non_constant_shape_array (nl
->sym
)
14504 && !gfc_notify_std (GFC_STD_F2003
, "NAMELIST array object %qs "
14505 "with nonconstant shape in namelist %qs at %L",
14506 nl
->sym
->name
, sym
->name
, &sym
->declared_at
))
14509 if (nl
->sym
->ts
.type
== BT_CHARACTER
14510 && (nl
->sym
->ts
.u
.cl
->length
== NULL
14511 || !gfc_is_constant_expr (nl
->sym
->ts
.u
.cl
->length
))
14512 && !gfc_notify_std (GFC_STD_F2003
, "NAMELIST object %qs with "
14513 "nonconstant character length in "
14514 "namelist %qs at %L", nl
->sym
->name
,
14515 sym
->name
, &sym
->declared_at
))
14520 /* Reject PRIVATE objects in a PUBLIC namelist. */
14521 if (gfc_check_symbol_access (sym
))
14523 for (nl
= sym
->namelist
; nl
; nl
= nl
->next
)
14525 if (!nl
->sym
->attr
.use_assoc
14526 && !is_sym_host_assoc (nl
->sym
, sym
->ns
)
14527 && !gfc_check_symbol_access (nl
->sym
))
14529 gfc_error ("NAMELIST object %qs was declared PRIVATE and "
14530 "cannot be member of PUBLIC namelist %qs at %L",
14531 nl
->sym
->name
, sym
->name
, &sym
->declared_at
);
14535 if (nl
->sym
->ts
.type
== BT_DERIVED
14536 && (nl
->sym
->ts
.u
.derived
->attr
.alloc_comp
14537 || nl
->sym
->ts
.u
.derived
->attr
.pointer_comp
))
14539 if (!gfc_notify_std (GFC_STD_F2003
, "NAMELIST object %qs in "
14540 "namelist %qs at %L with ALLOCATABLE "
14541 "or POINTER components", nl
->sym
->name
,
14542 sym
->name
, &sym
->declared_at
))
14547 /* Types with private components that came here by USE-association. */
14548 if (nl
->sym
->ts
.type
== BT_DERIVED
14549 && derived_inaccessible (nl
->sym
->ts
.u
.derived
))
14551 gfc_error ("NAMELIST object %qs has use-associated PRIVATE "
14552 "components and cannot be member of namelist %qs at %L",
14553 nl
->sym
->name
, sym
->name
, &sym
->declared_at
);
14557 /* Types with private components that are defined in the same module. */
14558 if (nl
->sym
->ts
.type
== BT_DERIVED
14559 && !is_sym_host_assoc (nl
->sym
->ts
.u
.derived
, sym
->ns
)
14560 && nl
->sym
->ts
.u
.derived
->attr
.private_comp
)
14562 gfc_error ("NAMELIST object %qs has PRIVATE components and "
14563 "cannot be a member of PUBLIC namelist %qs at %L",
14564 nl
->sym
->name
, sym
->name
, &sym
->declared_at
);
14571 /* 14.1.2 A module or internal procedure represent local entities
14572 of the same type as a namelist member and so are not allowed. */
14573 for (nl
= sym
->namelist
; nl
; nl
= nl
->next
)
14575 if (nl
->sym
->ts
.kind
!= 0 && nl
->sym
->attr
.flavor
== FL_VARIABLE
)
14578 if (nl
->sym
->attr
.function
&& nl
->sym
== nl
->sym
->result
)
14579 if ((nl
->sym
== sym
->ns
->proc_name
)
14581 (sym
->ns
->parent
&& nl
->sym
== sym
->ns
->parent
->proc_name
))
14586 gfc_find_symbol (nl
->sym
->name
, sym
->ns
, 1, &nlsym
);
14587 if (nlsym
&& nlsym
->attr
.flavor
== FL_PROCEDURE
)
14589 gfc_error ("PROCEDURE attribute conflicts with NAMELIST "
14590 "attribute in %qs at %L", nlsym
->name
,
14591 &sym
->declared_at
);
14598 for (nl
= sym
->namelist
; nl
; nl
= nl
->next
)
14599 nl
->sym
->attr
.asynchronous
= 1;
14606 resolve_fl_parameter (gfc_symbol
*sym
)
14608 /* A parameter array's shape needs to be constant. */
14609 if (sym
->as
!= NULL
14610 && (sym
->as
->type
== AS_DEFERRED
14611 || is_non_constant_shape_array (sym
)))
14613 gfc_error ("Parameter array %qs at %L cannot be automatic "
14614 "or of deferred shape", sym
->name
, &sym
->declared_at
);
14618 /* Constraints on deferred type parameter. */
14619 if (!deferred_requirements (sym
))
14622 /* Make sure a parameter that has been implicitly typed still
14623 matches the implicit type, since PARAMETER statements can precede
14624 IMPLICIT statements. */
14625 if (sym
->attr
.implicit_type
14626 && !gfc_compare_types (&sym
->ts
, gfc_get_default_type (sym
->name
,
14629 gfc_error ("Implicitly typed PARAMETER %qs at %L doesn't match a "
14630 "later IMPLICIT type", sym
->name
, &sym
->declared_at
);
14634 /* Make sure the types of derived parameters are consistent. This
14635 type checking is deferred until resolution because the type may
14636 refer to a derived type from the host. */
14637 if (sym
->ts
.type
== BT_DERIVED
14638 && !gfc_compare_types (&sym
->ts
, &sym
->value
->ts
))
14640 gfc_error ("Incompatible derived type in PARAMETER at %L",
14641 &sym
->value
->where
);
14645 /* F03:C509,C514. */
14646 if (sym
->ts
.type
== BT_CLASS
)
14648 gfc_error ("CLASS variable %qs at %L cannot have the PARAMETER attribute",
14649 sym
->name
, &sym
->declared_at
);
14657 /* Called by resolve_symbol to check PDTs. */
14660 resolve_pdt (gfc_symbol
* sym
)
14662 gfc_symbol
*derived
= NULL
;
14663 gfc_actual_arglist
*param
;
14665 bool const_len_exprs
= true;
14666 bool assumed_len_exprs
= false;
14667 symbol_attribute
*attr
;
14669 if (sym
->ts
.type
== BT_DERIVED
)
14671 derived
= sym
->ts
.u
.derived
;
14672 attr
= &(sym
->attr
);
14674 else if (sym
->ts
.type
== BT_CLASS
)
14676 derived
= CLASS_DATA (sym
)->ts
.u
.derived
;
14677 attr
= &(CLASS_DATA (sym
)->attr
);
14680 gcc_unreachable ();
14682 gcc_assert (derived
->attr
.pdt_type
);
14684 for (param
= sym
->param_list
; param
; param
= param
->next
)
14686 c
= gfc_find_component (derived
, param
->name
, false, true, NULL
);
14688 if (c
->attr
.pdt_kind
)
14691 if (param
->expr
&& !gfc_is_constant_expr (param
->expr
)
14692 && c
->attr
.pdt_len
)
14693 const_len_exprs
= false;
14694 else if (param
->spec_type
== SPEC_ASSUMED
)
14695 assumed_len_exprs
= true;
14697 if (param
->spec_type
== SPEC_DEFERRED
14698 && !attr
->allocatable
&& !attr
->pointer
)
14699 gfc_error ("The object %qs at %L has a deferred LEN "
14700 "parameter %qs and is neither allocatable "
14701 "nor a pointer", sym
->name
, &sym
->declared_at
,
14706 if (!const_len_exprs
14707 && (sym
->ns
->proc_name
->attr
.is_main_program
14708 || sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
14709 || sym
->attr
.save
!= SAVE_NONE
))
14710 gfc_error ("The AUTOMATIC object %qs at %L must not have the "
14711 "SAVE attribute or be a variable declared in the "
14712 "main program, a module or a submodule(F08/C513)",
14713 sym
->name
, &sym
->declared_at
);
14715 if (assumed_len_exprs
&& !(sym
->attr
.dummy
14716 || sym
->attr
.select_type_temporary
|| sym
->attr
.associate_var
))
14717 gfc_error ("The object %qs at %L with ASSUMED type parameters "
14718 "must be a dummy or a SELECT TYPE selector(F08/4.2)",
14719 sym
->name
, &sym
->declared_at
);
14723 /* Do anything necessary to resolve a symbol. Right now, we just
14724 assume that an otherwise unknown symbol is a variable. This sort
14725 of thing commonly happens for symbols in module. */
14728 resolve_symbol (gfc_symbol
*sym
)
14730 int check_constant
, mp_flag
;
14731 gfc_symtree
*symtree
;
14732 gfc_symtree
*this_symtree
;
14735 symbol_attribute class_attr
;
14736 gfc_array_spec
*as
;
14737 bool saved_specification_expr
;
14743 /* No symbol will ever have union type; only components can be unions.
14744 Union type declaration symbols have type BT_UNKNOWN but flavor FL_UNION
14745 (just like derived type declaration symbols have flavor FL_DERIVED). */
14746 gcc_assert (sym
->ts
.type
!= BT_UNION
);
14748 /* Coarrayed polymorphic objects with allocatable or pointer components are
14749 yet unsupported for -fcoarray=lib. */
14750 if (flag_coarray
== GFC_FCOARRAY_LIB
&& sym
->ts
.type
== BT_CLASS
14751 && sym
->ts
.u
.derived
&& CLASS_DATA (sym
)
14752 && CLASS_DATA (sym
)->attr
.codimension
14753 && (CLASS_DATA (sym
)->ts
.u
.derived
->attr
.alloc_comp
14754 || CLASS_DATA (sym
)->ts
.u
.derived
->attr
.pointer_comp
))
14756 gfc_error ("Sorry, allocatable/pointer components in polymorphic (CLASS) "
14757 "type coarrays at %L are unsupported", &sym
->declared_at
);
14761 if (sym
->attr
.artificial
)
14764 if (sym
->attr
.unlimited_polymorphic
)
14767 if (sym
->attr
.flavor
== FL_UNKNOWN
14768 || (sym
->attr
.flavor
== FL_PROCEDURE
&& !sym
->attr
.intrinsic
14769 && !sym
->attr
.generic
&& !sym
->attr
.external
14770 && sym
->attr
.if_source
== IFSRC_UNKNOWN
14771 && sym
->ts
.type
== BT_UNKNOWN
))
14774 /* If we find that a flavorless symbol is an interface in one of the
14775 parent namespaces, find its symtree in this namespace, free the
14776 symbol and set the symtree to point to the interface symbol. */
14777 for (ns
= gfc_current_ns
->parent
; ns
; ns
= ns
->parent
)
14779 symtree
= gfc_find_symtree (ns
->sym_root
, sym
->name
);
14780 if (symtree
&& (symtree
->n
.sym
->generic
||
14781 (symtree
->n
.sym
->attr
.flavor
== FL_PROCEDURE
14782 && sym
->ns
->construct_entities
)))
14784 this_symtree
= gfc_find_symtree (gfc_current_ns
->sym_root
,
14786 if (this_symtree
->n
.sym
== sym
)
14788 symtree
->n
.sym
->refs
++;
14789 gfc_release_symbol (sym
);
14790 this_symtree
->n
.sym
= symtree
->n
.sym
;
14796 /* Otherwise give it a flavor according to such attributes as
14798 if (sym
->attr
.flavor
== FL_UNKNOWN
&& sym
->attr
.external
== 0
14799 && sym
->attr
.intrinsic
== 0)
14800 sym
->attr
.flavor
= FL_VARIABLE
;
14801 else if (sym
->attr
.flavor
== FL_UNKNOWN
)
14803 sym
->attr
.flavor
= FL_PROCEDURE
;
14804 if (sym
->attr
.dimension
)
14805 sym
->attr
.function
= 1;
14809 if (sym
->attr
.external
&& sym
->ts
.type
!= BT_UNKNOWN
&& !sym
->attr
.function
)
14810 gfc_add_function (&sym
->attr
, sym
->name
, &sym
->declared_at
);
14812 if (sym
->attr
.procedure
&& sym
->attr
.if_source
!= IFSRC_DECL
14813 && !resolve_procedure_interface (sym
))
14816 if (sym
->attr
.is_protected
&& !sym
->attr
.proc_pointer
14817 && (sym
->attr
.procedure
|| sym
->attr
.external
))
14819 if (sym
->attr
.external
)
14820 gfc_error ("PROTECTED attribute conflicts with EXTERNAL attribute "
14821 "at %L", &sym
->declared_at
);
14823 gfc_error ("PROCEDURE attribute conflicts with PROTECTED attribute "
14824 "at %L", &sym
->declared_at
);
14829 if (sym
->attr
.flavor
== FL_DERIVED
&& !resolve_fl_derived (sym
))
14832 else if ((sym
->attr
.flavor
== FL_STRUCT
|| sym
->attr
.flavor
== FL_UNION
)
14833 && !resolve_fl_struct (sym
))
14836 /* Symbols that are module procedures with results (functions) have
14837 the types and array specification copied for type checking in
14838 procedures that call them, as well as for saving to a module
14839 file. These symbols can't stand the scrutiny that their results
14841 mp_flag
= (sym
->result
!= NULL
&& sym
->result
!= sym
);
14843 /* Make sure that the intrinsic is consistent with its internal
14844 representation. This needs to be done before assigning a default
14845 type to avoid spurious warnings. */
14846 if (sym
->attr
.flavor
!= FL_MODULE
&& sym
->attr
.intrinsic
14847 && !gfc_resolve_intrinsic (sym
, &sym
->declared_at
))
14850 /* Resolve associate names. */
14852 resolve_assoc_var (sym
, true);
14854 /* Assign default type to symbols that need one and don't have one. */
14855 if (sym
->ts
.type
== BT_UNKNOWN
)
14857 if (sym
->attr
.flavor
== FL_VARIABLE
|| sym
->attr
.flavor
== FL_PARAMETER
)
14859 gfc_set_default_type (sym
, 1, NULL
);
14862 if (sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.external
14863 && !sym
->attr
.function
&& !sym
->attr
.subroutine
14864 && gfc_get_default_type (sym
->name
, sym
->ns
)->type
== BT_UNKNOWN
)
14865 gfc_add_subroutine (&sym
->attr
, sym
->name
, &sym
->declared_at
);
14867 if (sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.function
)
14869 /* The specific case of an external procedure should emit an error
14870 in the case that there is no implicit type. */
14873 if (!sym
->attr
.mixed_entry_master
)
14874 gfc_set_default_type (sym
, sym
->attr
.external
, NULL
);
14878 /* Result may be in another namespace. */
14879 resolve_symbol (sym
->result
);
14881 if (!sym
->result
->attr
.proc_pointer
)
14883 sym
->ts
= sym
->result
->ts
;
14884 sym
->as
= gfc_copy_array_spec (sym
->result
->as
);
14885 sym
->attr
.dimension
= sym
->result
->attr
.dimension
;
14886 sym
->attr
.pointer
= sym
->result
->attr
.pointer
;
14887 sym
->attr
.allocatable
= sym
->result
->attr
.allocatable
;
14888 sym
->attr
.contiguous
= sym
->result
->attr
.contiguous
;
14893 else if (mp_flag
&& sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.function
)
14895 bool saved_specification_expr
= specification_expr
;
14896 specification_expr
= true;
14897 gfc_resolve_array_spec (sym
->result
->as
, false);
14898 specification_expr
= saved_specification_expr
;
14901 if (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
)
14903 as
= CLASS_DATA (sym
)->as
;
14904 class_attr
= CLASS_DATA (sym
)->attr
;
14905 class_attr
.pointer
= class_attr
.class_pointer
;
14909 class_attr
= sym
->attr
;
14914 if (sym
->attr
.contiguous
14915 && (!class_attr
.dimension
14916 || (as
->type
!= AS_ASSUMED_SHAPE
&& as
->type
!= AS_ASSUMED_RANK
14917 && !class_attr
.pointer
)))
14919 gfc_error ("%qs at %L has the CONTIGUOUS attribute but is not an "
14920 "array pointer or an assumed-shape or assumed-rank array",
14921 sym
->name
, &sym
->declared_at
);
14925 /* Assumed size arrays and assumed shape arrays must be dummy
14926 arguments. Array-spec's of implied-shape should have been resolved to
14927 AS_EXPLICIT already. */
14931 /* If AS_IMPLIED_SHAPE makes it to here, it must be a bad
14932 specification expression. */
14933 if (as
->type
== AS_IMPLIED_SHAPE
)
14936 for (i
=0; i
<as
->rank
; i
++)
14938 if (as
->lower
[i
] != NULL
&& as
->upper
[i
] == NULL
)
14940 gfc_error ("Bad specification for assumed size array at %L",
14941 &as
->lower
[i
]->where
);
14948 if (((as
->type
== AS_ASSUMED_SIZE
&& !as
->cp_was_assumed
)
14949 || as
->type
== AS_ASSUMED_SHAPE
)
14950 && !sym
->attr
.dummy
&& !sym
->attr
.select_type_temporary
)
14952 if (as
->type
== AS_ASSUMED_SIZE
)
14953 gfc_error ("Assumed size array at %L must be a dummy argument",
14954 &sym
->declared_at
);
14956 gfc_error ("Assumed shape array at %L must be a dummy argument",
14957 &sym
->declared_at
);
14960 /* TS 29113, C535a. */
14961 if (as
->type
== AS_ASSUMED_RANK
&& !sym
->attr
.dummy
14962 && !sym
->attr
.select_type_temporary
)
14964 gfc_error ("Assumed-rank array at %L must be a dummy argument",
14965 &sym
->declared_at
);
14968 if (as
->type
== AS_ASSUMED_RANK
14969 && (sym
->attr
.codimension
|| sym
->attr
.value
))
14971 gfc_error ("Assumed-rank array at %L may not have the VALUE or "
14972 "CODIMENSION attribute", &sym
->declared_at
);
14977 /* Make sure symbols with known intent or optional are really dummy
14978 variable. Because of ENTRY statement, this has to be deferred
14979 until resolution time. */
14981 if (!sym
->attr
.dummy
14982 && (sym
->attr
.optional
|| sym
->attr
.intent
!= INTENT_UNKNOWN
))
14984 gfc_error ("Symbol at %L is not a DUMMY variable", &sym
->declared_at
);
14988 if (sym
->attr
.value
&& !sym
->attr
.dummy
)
14990 gfc_error ("%qs at %L cannot have the VALUE attribute because "
14991 "it is not a dummy argument", sym
->name
, &sym
->declared_at
);
14995 if (sym
->attr
.value
&& sym
->ts
.type
== BT_CHARACTER
)
14997 gfc_charlen
*cl
= sym
->ts
.u
.cl
;
14998 if (!cl
|| !cl
->length
|| cl
->length
->expr_type
!= EXPR_CONSTANT
)
15000 gfc_error ("Character dummy variable %qs at %L with VALUE "
15001 "attribute must have constant length",
15002 sym
->name
, &sym
->declared_at
);
15006 if (sym
->ts
.is_c_interop
15007 && mpz_cmp_si (cl
->length
->value
.integer
, 1) != 0)
15009 gfc_error ("C interoperable character dummy variable %qs at %L "
15010 "with VALUE attribute must have length one",
15011 sym
->name
, &sym
->declared_at
);
15016 if (sym
->ts
.type
== BT_DERIVED
&& !sym
->attr
.is_iso_c
15017 && sym
->ts
.u
.derived
->attr
.generic
)
15019 sym
->ts
.u
.derived
= gfc_find_dt_in_generic (sym
->ts
.u
.derived
);
15020 if (!sym
->ts
.u
.derived
)
15022 gfc_error ("The derived type %qs at %L is of type %qs, "
15023 "which has not been defined", sym
->name
,
15024 &sym
->declared_at
, sym
->ts
.u
.derived
->name
);
15025 sym
->ts
.type
= BT_UNKNOWN
;
15030 /* Use the same constraints as TYPE(*), except for the type check
15031 and that only scalars and assumed-size arrays are permitted. */
15032 if (sym
->attr
.ext_attr
& (1 << EXT_ATTR_NO_ARG_CHECK
))
15034 if (!sym
->attr
.dummy
)
15036 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute shall be "
15037 "a dummy argument", sym
->name
, &sym
->declared_at
);
15041 if (sym
->ts
.type
!= BT_ASSUMED
&& sym
->ts
.type
!= BT_INTEGER
15042 && sym
->ts
.type
!= BT_REAL
&& sym
->ts
.type
!= BT_LOGICAL
15043 && sym
->ts
.type
!= BT_COMPLEX
)
15045 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute shall be "
15046 "of type TYPE(*) or of an numeric intrinsic type",
15047 sym
->name
, &sym
->declared_at
);
15051 if (sym
->attr
.allocatable
|| sym
->attr
.codimension
15052 || sym
->attr
.pointer
|| sym
->attr
.value
)
15054 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute may not "
15055 "have the ALLOCATABLE, CODIMENSION, POINTER or VALUE "
15056 "attribute", sym
->name
, &sym
->declared_at
);
15060 if (sym
->attr
.intent
== INTENT_OUT
)
15062 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute may not "
15063 "have the INTENT(OUT) attribute",
15064 sym
->name
, &sym
->declared_at
);
15067 if (sym
->attr
.dimension
&& sym
->as
->type
!= AS_ASSUMED_SIZE
)
15069 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute shall "
15070 "either be a scalar or an assumed-size array",
15071 sym
->name
, &sym
->declared_at
);
15075 /* Set the type to TYPE(*) and add a dimension(*) to ensure
15076 NO_ARG_CHECK is correctly handled in trans*.c, e.g. with
15078 sym
->ts
.type
= BT_ASSUMED
;
15079 sym
->as
= gfc_get_array_spec ();
15080 sym
->as
->type
= AS_ASSUMED_SIZE
;
15082 sym
->as
->lower
[0] = gfc_get_int_expr (gfc_default_integer_kind
, NULL
, 1);
15084 else if (sym
->ts
.type
== BT_ASSUMED
)
15086 /* TS 29113, C407a. */
15087 if (!sym
->attr
.dummy
)
15089 gfc_error ("Assumed type of variable %s at %L is only permitted "
15090 "for dummy variables", sym
->name
, &sym
->declared_at
);
15093 if (sym
->attr
.allocatable
|| sym
->attr
.codimension
15094 || sym
->attr
.pointer
|| sym
->attr
.value
)
15096 gfc_error ("Assumed-type variable %s at %L may not have the "
15097 "ALLOCATABLE, CODIMENSION, POINTER or VALUE attribute",
15098 sym
->name
, &sym
->declared_at
);
15101 if (sym
->attr
.intent
== INTENT_OUT
)
15103 gfc_error ("Assumed-type variable %s at %L may not have the "
15104 "INTENT(OUT) attribute",
15105 sym
->name
, &sym
->declared_at
);
15108 if (sym
->attr
.dimension
&& sym
->as
->type
== AS_EXPLICIT
)
15110 gfc_error ("Assumed-type variable %s at %L shall not be an "
15111 "explicit-shape array", sym
->name
, &sym
->declared_at
);
15116 /* If the symbol is marked as bind(c), that it is declared at module level
15117 scope and verify its type and kind. Do not do the latter for symbols
15118 that are implicitly typed because that is handled in
15119 gfc_set_default_type. Handle dummy arguments and procedure definitions
15120 separately. Also, anything that is use associated is not handled here
15121 but instead is handled in the module it is declared in. Finally, derived
15122 type definitions are allowed to be BIND(C) since that only implies that
15123 they're interoperable, and they are checked fully for interoperability
15124 when a variable is declared of that type. */
15125 if (sym
->attr
.is_bind_c
&& sym
->attr
.use_assoc
== 0
15126 && sym
->attr
.dummy
== 0 && sym
->attr
.flavor
!= FL_PROCEDURE
15127 && sym
->attr
.flavor
!= FL_DERIVED
)
15131 /* First, make sure the variable is declared at the
15132 module-level scope (J3/04-007, Section 15.3). */
15133 if (sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
&&
15134 sym
->attr
.in_common
== 0)
15136 gfc_error ("Variable %qs at %L cannot be BIND(C) because it "
15137 "is neither a COMMON block nor declared at the "
15138 "module level scope", sym
->name
, &(sym
->declared_at
));
15141 else if (sym
->ts
.type
== BT_CHARACTER
15142 && (sym
->ts
.u
.cl
== NULL
|| sym
->ts
.u
.cl
->length
== NULL
15143 || !gfc_is_constant_expr (sym
->ts
.u
.cl
->length
)
15144 || mpz_cmp_si (sym
->ts
.u
.cl
->length
->value
.integer
, 1) != 0))
15146 gfc_error ("BIND(C) Variable %qs at %L must have length one",
15147 sym
->name
, &sym
->declared_at
);
15150 else if (sym
->common_head
!= NULL
&& sym
->attr
.implicit_type
== 0)
15152 t
= verify_com_block_vars_c_interop (sym
->common_head
);
15154 else if (sym
->attr
.implicit_type
== 0)
15156 /* If type() declaration, we need to verify that the components
15157 of the given type are all C interoperable, etc. */
15158 if (sym
->ts
.type
== BT_DERIVED
&&
15159 sym
->ts
.u
.derived
->attr
.is_c_interop
!= 1)
15161 /* Make sure the user marked the derived type as BIND(C). If
15162 not, call the verify routine. This could print an error
15163 for the derived type more than once if multiple variables
15164 of that type are declared. */
15165 if (sym
->ts
.u
.derived
->attr
.is_bind_c
!= 1)
15166 verify_bind_c_derived_type (sym
->ts
.u
.derived
);
15170 /* Verify the variable itself as C interoperable if it
15171 is BIND(C). It is not possible for this to succeed if
15172 the verify_bind_c_derived_type failed, so don't have to handle
15173 any error returned by verify_bind_c_derived_type. */
15174 t
= verify_bind_c_sym (sym
, &(sym
->ts
), sym
->attr
.in_common
,
15175 sym
->common_block
);
15180 /* clear the is_bind_c flag to prevent reporting errors more than
15181 once if something failed. */
15182 sym
->attr
.is_bind_c
= 0;
15187 /* If a derived type symbol has reached this point, without its
15188 type being declared, we have an error. Notice that most
15189 conditions that produce undefined derived types have already
15190 been dealt with. However, the likes of:
15191 implicit type(t) (t) ..... call foo (t) will get us here if
15192 the type is not declared in the scope of the implicit
15193 statement. Change the type to BT_UNKNOWN, both because it is so
15194 and to prevent an ICE. */
15195 if (sym
->ts
.type
== BT_DERIVED
&& !sym
->attr
.is_iso_c
15196 && sym
->ts
.u
.derived
->components
== NULL
15197 && !sym
->ts
.u
.derived
->attr
.zero_comp
)
15199 gfc_error ("The derived type %qs at %L is of type %qs, "
15200 "which has not been defined", sym
->name
,
15201 &sym
->declared_at
, sym
->ts
.u
.derived
->name
);
15202 sym
->ts
.type
= BT_UNKNOWN
;
15206 /* Make sure that the derived type has been resolved and that the
15207 derived type is visible in the symbol's namespace, if it is a
15208 module function and is not PRIVATE. */
15209 if (sym
->ts
.type
== BT_DERIVED
15210 && sym
->ts
.u
.derived
->attr
.use_assoc
15211 && sym
->ns
->proc_name
15212 && sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
15213 && !resolve_fl_derived (sym
->ts
.u
.derived
))
15216 /* Unless the derived-type declaration is use associated, Fortran 95
15217 does not allow public entries of private derived types.
15218 See 4.4.1 (F95) and 4.5.1.1 (F2003); and related interpretation
15219 161 in 95-006r3. */
15220 if (sym
->ts
.type
== BT_DERIVED
15221 && sym
->ns
->proc_name
&& sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
15222 && !sym
->ts
.u
.derived
->attr
.use_assoc
15223 && gfc_check_symbol_access (sym
)
15224 && !gfc_check_symbol_access (sym
->ts
.u
.derived
)
15225 && !gfc_notify_std (GFC_STD_F2003
, "PUBLIC %s %qs at %L of PRIVATE "
15226 "derived type %qs",
15227 (sym
->attr
.flavor
== FL_PARAMETER
)
15228 ? "parameter" : "variable",
15229 sym
->name
, &sym
->declared_at
,
15230 sym
->ts
.u
.derived
->name
))
15233 /* F2008, C1302. */
15234 if (sym
->ts
.type
== BT_DERIVED
15235 && ((sym
->ts
.u
.derived
->from_intmod
== INTMOD_ISO_FORTRAN_ENV
15236 && sym
->ts
.u
.derived
->intmod_sym_id
== ISOFORTRAN_LOCK_TYPE
)
15237 || sym
->ts
.u
.derived
->attr
.lock_comp
)
15238 && !sym
->attr
.codimension
&& !sym
->ts
.u
.derived
->attr
.coarray_comp
)
15240 gfc_error ("Variable %s at %L of type LOCK_TYPE or with subcomponent of "
15241 "type LOCK_TYPE must be a coarray", sym
->name
,
15242 &sym
->declared_at
);
15246 /* TS18508, C702/C703. */
15247 if (sym
->ts
.type
== BT_DERIVED
15248 && ((sym
->ts
.u
.derived
->from_intmod
== INTMOD_ISO_FORTRAN_ENV
15249 && sym
->ts
.u
.derived
->intmod_sym_id
== ISOFORTRAN_EVENT_TYPE
)
15250 || sym
->ts
.u
.derived
->attr
.event_comp
)
15251 && !sym
->attr
.codimension
&& !sym
->ts
.u
.derived
->attr
.coarray_comp
)
15253 gfc_error ("Variable %s at %L of type EVENT_TYPE or with subcomponent of "
15254 "type EVENT_TYPE must be a coarray", sym
->name
,
15255 &sym
->declared_at
);
15259 /* An assumed-size array with INTENT(OUT) shall not be of a type for which
15260 default initialization is defined (5.1.2.4.4). */
15261 if (sym
->ts
.type
== BT_DERIVED
15263 && sym
->attr
.intent
== INTENT_OUT
15265 && sym
->as
->type
== AS_ASSUMED_SIZE
)
15267 for (c
= sym
->ts
.u
.derived
->components
; c
; c
= c
->next
)
15269 if (c
->initializer
)
15271 gfc_error ("The INTENT(OUT) dummy argument %qs at %L is "
15272 "ASSUMED SIZE and so cannot have a default initializer",
15273 sym
->name
, &sym
->declared_at
);
15280 if (sym
->ts
.type
== BT_DERIVED
&& sym
->attr
.dummy
15281 && sym
->attr
.intent
== INTENT_OUT
&& sym
->attr
.lock_comp
)
15283 gfc_error ("Dummy argument %qs at %L of LOCK_TYPE shall not be "
15284 "INTENT(OUT)", sym
->name
, &sym
->declared_at
);
15289 if (sym
->ts
.type
== BT_DERIVED
&& sym
->attr
.dummy
15290 && sym
->attr
.intent
== INTENT_OUT
&& sym
->attr
.event_comp
)
15292 gfc_error ("Dummy argument %qs at %L of EVENT_TYPE shall not be "
15293 "INTENT(OUT)", sym
->name
, &sym
->declared_at
);
15298 if ((((sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
->attr
.coarray_comp
)
15299 || (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
15300 && CLASS_DATA (sym
)->attr
.coarray_comp
))
15301 || class_attr
.codimension
)
15302 && (sym
->attr
.result
|| sym
->result
== sym
))
15304 gfc_error ("Function result %qs at %L shall not be a coarray or have "
15305 "a coarray component", sym
->name
, &sym
->declared_at
);
15310 if (sym
->attr
.codimension
&& sym
->ts
.type
== BT_DERIVED
15311 && sym
->ts
.u
.derived
->ts
.is_iso_c
)
15313 gfc_error ("Variable %qs at %L of TYPE(C_PTR) or TYPE(C_FUNPTR) "
15314 "shall not be a coarray", sym
->name
, &sym
->declared_at
);
15319 if (((sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
->attr
.coarray_comp
)
15320 || (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
15321 && CLASS_DATA (sym
)->attr
.coarray_comp
))
15322 && (class_attr
.codimension
|| class_attr
.pointer
|| class_attr
.dimension
15323 || class_attr
.allocatable
))
15325 gfc_error ("Variable %qs at %L with coarray component shall be a "
15326 "nonpointer, nonallocatable scalar, which is not a coarray",
15327 sym
->name
, &sym
->declared_at
);
15331 /* F2008, C526. The function-result case was handled above. */
15332 if (class_attr
.codimension
15333 && !(class_attr
.allocatable
|| sym
->attr
.dummy
|| sym
->attr
.save
15334 || sym
->attr
.select_type_temporary
15335 || sym
->attr
.associate_var
15336 || (sym
->ns
->save_all
&& !sym
->attr
.automatic
)
15337 || sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
15338 || sym
->ns
->proc_name
->attr
.is_main_program
15339 || sym
->attr
.function
|| sym
->attr
.result
|| sym
->attr
.use_assoc
))
15341 gfc_error ("Variable %qs at %L is a coarray and is not ALLOCATABLE, SAVE "
15342 "nor a dummy argument", sym
->name
, &sym
->declared_at
);
15346 else if (class_attr
.codimension
&& !sym
->attr
.select_type_temporary
15347 && !class_attr
.allocatable
&& as
&& as
->cotype
== AS_DEFERRED
)
15349 gfc_error ("Coarray variable %qs at %L shall not have codimensions with "
15350 "deferred shape", sym
->name
, &sym
->declared_at
);
15353 else if (class_attr
.codimension
&& class_attr
.allocatable
&& as
15354 && (as
->cotype
!= AS_DEFERRED
|| as
->type
!= AS_DEFERRED
))
15356 gfc_error ("Allocatable coarray variable %qs at %L must have "
15357 "deferred shape", sym
->name
, &sym
->declared_at
);
15362 if ((((sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
->attr
.coarray_comp
)
15363 || (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
15364 && CLASS_DATA (sym
)->attr
.coarray_comp
))
15365 || (class_attr
.codimension
&& class_attr
.allocatable
))
15366 && sym
->attr
.dummy
&& sym
->attr
.intent
== INTENT_OUT
)
15368 gfc_error ("Variable %qs at %L is INTENT(OUT) and can thus not be an "
15369 "allocatable coarray or have coarray components",
15370 sym
->name
, &sym
->declared_at
);
15374 if (class_attr
.codimension
&& sym
->attr
.dummy
15375 && sym
->ns
->proc_name
&& sym
->ns
->proc_name
->attr
.is_bind_c
)
15377 gfc_error ("Coarray dummy variable %qs at %L not allowed in BIND(C) "
15378 "procedure %qs", sym
->name
, &sym
->declared_at
,
15379 sym
->ns
->proc_name
->name
);
15383 if (sym
->ts
.type
== BT_LOGICAL
15384 && ((sym
->attr
.function
&& sym
->attr
.is_bind_c
&& sym
->result
== sym
)
15385 || ((sym
->attr
.dummy
|| sym
->attr
.result
) && sym
->ns
->proc_name
15386 && sym
->ns
->proc_name
->attr
.is_bind_c
)))
15389 for (i
= 0; gfc_logical_kinds
[i
].kind
; i
++)
15390 if (gfc_logical_kinds
[i
].kind
== sym
->ts
.kind
)
15392 if (!gfc_logical_kinds
[i
].c_bool
&& sym
->attr
.dummy
15393 && !gfc_notify_std (GFC_STD_GNU
, "LOGICAL dummy argument %qs at "
15394 "%L with non-C_Bool kind in BIND(C) procedure "
15395 "%qs", sym
->name
, &sym
->declared_at
,
15396 sym
->ns
->proc_name
->name
))
15398 else if (!gfc_logical_kinds
[i
].c_bool
15399 && !gfc_notify_std (GFC_STD_GNU
, "LOGICAL result variable "
15400 "%qs at %L with non-C_Bool kind in "
15401 "BIND(C) procedure %qs", sym
->name
,
15403 sym
->attr
.function
? sym
->name
15404 : sym
->ns
->proc_name
->name
))
15408 switch (sym
->attr
.flavor
)
15411 if (!resolve_fl_variable (sym
, mp_flag
))
15416 if (sym
->formal
&& !sym
->formal_ns
)
15418 /* Check that none of the arguments are a namelist. */
15419 gfc_formal_arglist
*formal
= sym
->formal
;
15421 for (; formal
; formal
= formal
->next
)
15422 if (formal
->sym
&& formal
->sym
->attr
.flavor
== FL_NAMELIST
)
15424 gfc_error ("Namelist %qs cannot be an argument to "
15425 "subroutine or function at %L",
15426 formal
->sym
->name
, &sym
->declared_at
);
15431 if (!resolve_fl_procedure (sym
, mp_flag
))
15436 if (!resolve_fl_namelist (sym
))
15441 if (!resolve_fl_parameter (sym
))
15449 /* Resolve array specifier. Check as well some constraints
15450 on COMMON blocks. */
15452 check_constant
= sym
->attr
.in_common
&& !sym
->attr
.pointer
;
15454 /* Set the formal_arg_flag so that check_conflict will not throw
15455 an error for host associated variables in the specification
15456 expression for an array_valued function. */
15457 if ((sym
->attr
.function
|| sym
->attr
.result
) && sym
->as
)
15458 formal_arg_flag
= true;
15460 saved_specification_expr
= specification_expr
;
15461 specification_expr
= true;
15462 gfc_resolve_array_spec (sym
->as
, check_constant
);
15463 specification_expr
= saved_specification_expr
;
15465 formal_arg_flag
= false;
15467 /* Resolve formal namespaces. */
15468 if (sym
->formal_ns
&& sym
->formal_ns
!= gfc_current_ns
15469 && !sym
->attr
.contained
&& !sym
->attr
.intrinsic
)
15470 gfc_resolve (sym
->formal_ns
);
15472 /* Make sure the formal namespace is present. */
15473 if (sym
->formal
&& !sym
->formal_ns
)
15475 gfc_formal_arglist
*formal
= sym
->formal
;
15476 while (formal
&& !formal
->sym
)
15477 formal
= formal
->next
;
15481 sym
->formal_ns
= formal
->sym
->ns
;
15482 if (sym
->ns
!= formal
->sym
->ns
)
15483 sym
->formal_ns
->refs
++;
15487 /* Check threadprivate restrictions. */
15488 if (sym
->attr
.threadprivate
&& !sym
->attr
.save
15489 && !(sym
->ns
->save_all
&& !sym
->attr
.automatic
)
15490 && (!sym
->attr
.in_common
15491 && sym
->module
== NULL
15492 && (sym
->ns
->proc_name
== NULL
15493 || sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
)))
15494 gfc_error ("Threadprivate at %L isn't SAVEd", &sym
->declared_at
);
15496 /* Check omp declare target restrictions. */
15497 if (sym
->attr
.omp_declare_target
15498 && sym
->attr
.flavor
== FL_VARIABLE
15500 && !(sym
->ns
->save_all
&& !sym
->attr
.automatic
)
15501 && (!sym
->attr
.in_common
15502 && sym
->module
== NULL
15503 && (sym
->ns
->proc_name
== NULL
15504 || sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
)))
15505 gfc_error ("!$OMP DECLARE TARGET variable %qs at %L isn't SAVEd",
15506 sym
->name
, &sym
->declared_at
);
15508 /* If we have come this far we can apply default-initializers, as
15509 described in 14.7.5, to those variables that have not already
15510 been assigned one. */
15511 if (sym
->ts
.type
== BT_DERIVED
15513 && !sym
->attr
.allocatable
15514 && !sym
->attr
.alloc_comp
)
15516 symbol_attribute
*a
= &sym
->attr
;
15518 if ((!a
->save
&& !a
->dummy
&& !a
->pointer
15519 && !a
->in_common
&& !a
->use_assoc
15521 && !((a
->function
|| a
->result
)
15523 || sym
->ts
.u
.derived
->attr
.alloc_comp
15524 || sym
->ts
.u
.derived
->attr
.pointer_comp
))
15525 && !(a
->function
&& sym
!= sym
->result
))
15526 || (a
->dummy
&& a
->intent
== INTENT_OUT
&& !a
->pointer
))
15527 apply_default_init (sym
);
15528 else if (a
->function
&& sym
->result
&& a
->access
!= ACCESS_PRIVATE
15529 && (sym
->ts
.u
.derived
->attr
.alloc_comp
15530 || sym
->ts
.u
.derived
->attr
.pointer_comp
))
15531 /* Mark the result symbol to be referenced, when it has allocatable
15533 sym
->result
->attr
.referenced
= 1;
15536 if (sym
->ts
.type
== BT_CLASS
&& sym
->ns
== gfc_current_ns
15537 && sym
->attr
.dummy
&& sym
->attr
.intent
== INTENT_OUT
15538 && !CLASS_DATA (sym
)->attr
.class_pointer
15539 && !CLASS_DATA (sym
)->attr
.allocatable
)
15540 apply_default_init (sym
);
15542 /* If this symbol has a type-spec, check it. */
15543 if (sym
->attr
.flavor
== FL_VARIABLE
|| sym
->attr
.flavor
== FL_PARAMETER
15544 || (sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.function
))
15545 if (!resolve_typespec_used (&sym
->ts
, &sym
->declared_at
, sym
->name
))
15548 if (sym
->param_list
)
15553 /************* Resolve DATA statements *************/
15557 gfc_data_value
*vnode
;
15563 /* Advance the values structure to point to the next value in the data list. */
15566 next_data_value (void)
15568 while (mpz_cmp_ui (values
.left
, 0) == 0)
15571 if (values
.vnode
->next
== NULL
)
15574 values
.vnode
= values
.vnode
->next
;
15575 mpz_set (values
.left
, values
.vnode
->repeat
);
15583 check_data_variable (gfc_data_variable
*var
, locus
*where
)
15589 ar_type mark
= AR_UNKNOWN
;
15591 mpz_t section_index
[GFC_MAX_DIMENSIONS
];
15597 if (!gfc_resolve_expr (var
->expr
))
15601 mpz_init_set_si (offset
, 0);
15604 if (e
->expr_type
== EXPR_FUNCTION
&& e
->value
.function
.isym
15605 && e
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
)
15606 e
= e
->value
.function
.actual
->expr
;
15608 if (e
->expr_type
!= EXPR_VARIABLE
)
15610 gfc_error ("Expecting definable entity near %L", where
);
15614 sym
= e
->symtree
->n
.sym
;
15616 if (sym
->ns
->is_block_data
&& !sym
->attr
.in_common
)
15618 gfc_error ("BLOCK DATA element %qs at %L must be in COMMON",
15619 sym
->name
, &sym
->declared_at
);
15623 if (e
->ref
== NULL
&& sym
->as
)
15625 gfc_error ("DATA array %qs at %L must be specified in a previous"
15626 " declaration", sym
->name
, where
);
15630 has_pointer
= sym
->attr
.pointer
;
15632 if (gfc_is_coindexed (e
))
15634 gfc_error ("DATA element %qs at %L cannot have a coindex", sym
->name
,
15639 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
15641 if (ref
->type
== REF_COMPONENT
&& ref
->u
.c
.component
->attr
.pointer
)
15645 && ref
->type
== REF_ARRAY
15646 && ref
->u
.ar
.type
!= AR_FULL
)
15648 gfc_error ("DATA element %qs at %L is a pointer and so must "
15649 "be a full array", sym
->name
, where
);
15654 if (e
->rank
== 0 || has_pointer
)
15656 mpz_init_set_ui (size
, 1);
15663 /* Find the array section reference. */
15664 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
15666 if (ref
->type
!= REF_ARRAY
)
15668 if (ref
->u
.ar
.type
== AR_ELEMENT
)
15674 /* Set marks according to the reference pattern. */
15675 switch (ref
->u
.ar
.type
)
15683 /* Get the start position of array section. */
15684 gfc_get_section_index (ar
, section_index
, &offset
);
15689 gcc_unreachable ();
15692 if (!gfc_array_size (e
, &size
))
15694 gfc_error ("Nonconstant array section at %L in DATA statement",
15696 mpz_clear (offset
);
15703 while (mpz_cmp_ui (size
, 0) > 0)
15705 if (!next_data_value ())
15707 gfc_error ("DATA statement at %L has more variables than values",
15713 t
= gfc_check_assign (var
->expr
, values
.vnode
->expr
, 0);
15717 /* If we have more than one element left in the repeat count,
15718 and we have more than one element left in the target variable,
15719 then create a range assignment. */
15720 /* FIXME: Only done for full arrays for now, since array sections
15722 if (mark
== AR_FULL
&& ref
&& ref
->next
== NULL
15723 && mpz_cmp_ui (values
.left
, 1) > 0 && mpz_cmp_ui (size
, 1) > 0)
15727 if (mpz_cmp (size
, values
.left
) >= 0)
15729 mpz_init_set (range
, values
.left
);
15730 mpz_sub (size
, size
, values
.left
);
15731 mpz_set_ui (values
.left
, 0);
15735 mpz_init_set (range
, size
);
15736 mpz_sub (values
.left
, values
.left
, size
);
15737 mpz_set_ui (size
, 0);
15740 t
= gfc_assign_data_value (var
->expr
, values
.vnode
->expr
,
15743 mpz_add (offset
, offset
, range
);
15750 /* Assign initial value to symbol. */
15753 mpz_sub_ui (values
.left
, values
.left
, 1);
15754 mpz_sub_ui (size
, size
, 1);
15756 t
= gfc_assign_data_value (var
->expr
, values
.vnode
->expr
,
15761 if (mark
== AR_FULL
)
15762 mpz_add_ui (offset
, offset
, 1);
15764 /* Modify the array section indexes and recalculate the offset
15765 for next element. */
15766 else if (mark
== AR_SECTION
)
15767 gfc_advance_section (section_index
, ar
, &offset
);
15771 if (mark
== AR_SECTION
)
15773 for (i
= 0; i
< ar
->dimen
; i
++)
15774 mpz_clear (section_index
[i
]);
15778 mpz_clear (offset
);
15784 static bool traverse_data_var (gfc_data_variable
*, locus
*);
15786 /* Iterate over a list of elements in a DATA statement. */
15789 traverse_data_list (gfc_data_variable
*var
, locus
*where
)
15792 iterator_stack frame
;
15793 gfc_expr
*e
, *start
, *end
, *step
;
15794 bool retval
= true;
15796 mpz_init (frame
.value
);
15799 start
= gfc_copy_expr (var
->iter
.start
);
15800 end
= gfc_copy_expr (var
->iter
.end
);
15801 step
= gfc_copy_expr (var
->iter
.step
);
15803 if (!gfc_simplify_expr (start
, 1)
15804 || start
->expr_type
!= EXPR_CONSTANT
)
15806 gfc_error ("start of implied-do loop at %L could not be "
15807 "simplified to a constant value", &start
->where
);
15811 if (!gfc_simplify_expr (end
, 1)
15812 || end
->expr_type
!= EXPR_CONSTANT
)
15814 gfc_error ("end of implied-do loop at %L could not be "
15815 "simplified to a constant value", &start
->where
);
15819 if (!gfc_simplify_expr (step
, 1)
15820 || step
->expr_type
!= EXPR_CONSTANT
)
15822 gfc_error ("step of implied-do loop at %L could not be "
15823 "simplified to a constant value", &start
->where
);
15828 mpz_set (trip
, end
->value
.integer
);
15829 mpz_sub (trip
, trip
, start
->value
.integer
);
15830 mpz_add (trip
, trip
, step
->value
.integer
);
15832 mpz_div (trip
, trip
, step
->value
.integer
);
15834 mpz_set (frame
.value
, start
->value
.integer
);
15836 frame
.prev
= iter_stack
;
15837 frame
.variable
= var
->iter
.var
->symtree
;
15838 iter_stack
= &frame
;
15840 while (mpz_cmp_ui (trip
, 0) > 0)
15842 if (!traverse_data_var (var
->list
, where
))
15848 e
= gfc_copy_expr (var
->expr
);
15849 if (!gfc_simplify_expr (e
, 1))
15856 mpz_add (frame
.value
, frame
.value
, step
->value
.integer
);
15858 mpz_sub_ui (trip
, trip
, 1);
15862 mpz_clear (frame
.value
);
15865 gfc_free_expr (start
);
15866 gfc_free_expr (end
);
15867 gfc_free_expr (step
);
15869 iter_stack
= frame
.prev
;
15874 /* Type resolve variables in the variable list of a DATA statement. */
15877 traverse_data_var (gfc_data_variable
*var
, locus
*where
)
15881 for (; var
; var
= var
->next
)
15883 if (var
->expr
== NULL
)
15884 t
= traverse_data_list (var
, where
);
15886 t
= check_data_variable (var
, where
);
15896 /* Resolve the expressions and iterators associated with a data statement.
15897 This is separate from the assignment checking because data lists should
15898 only be resolved once. */
15901 resolve_data_variables (gfc_data_variable
*d
)
15903 for (; d
; d
= d
->next
)
15905 if (d
->list
== NULL
)
15907 if (!gfc_resolve_expr (d
->expr
))
15912 if (!gfc_resolve_iterator (&d
->iter
, false, true))
15915 if (!resolve_data_variables (d
->list
))
15924 /* Resolve a single DATA statement. We implement this by storing a pointer to
15925 the value list into static variables, and then recursively traversing the
15926 variables list, expanding iterators and such. */
15929 resolve_data (gfc_data
*d
)
15932 if (!resolve_data_variables (d
->var
))
15935 values
.vnode
= d
->value
;
15936 if (d
->value
== NULL
)
15937 mpz_set_ui (values
.left
, 0);
15939 mpz_set (values
.left
, d
->value
->repeat
);
15941 if (!traverse_data_var (d
->var
, &d
->where
))
15944 /* At this point, we better not have any values left. */
15946 if (next_data_value ())
15947 gfc_error ("DATA statement at %L has more values than variables",
15952 /* 12.6 Constraint: In a pure subprogram any variable which is in common or
15953 accessed by host or use association, is a dummy argument to a pure function,
15954 is a dummy argument with INTENT (IN) to a pure subroutine, or an object that
15955 is storage associated with any such variable, shall not be used in the
15956 following contexts: (clients of this function). */
15958 /* Determines if a variable is not 'pure', i.e., not assignable within a pure
15959 procedure. Returns zero if assignment is OK, nonzero if there is a
15962 gfc_impure_variable (gfc_symbol
*sym
)
15967 if (sym
->attr
.use_assoc
|| sym
->attr
.in_common
)
15970 /* Check if the symbol's ns is inside the pure procedure. */
15971 for (ns
= gfc_current_ns
; ns
; ns
= ns
->parent
)
15975 if (ns
->proc_name
->attr
.flavor
== FL_PROCEDURE
&& !sym
->attr
.function
)
15979 proc
= sym
->ns
->proc_name
;
15980 if (sym
->attr
.dummy
15981 && ((proc
->attr
.subroutine
&& sym
->attr
.intent
== INTENT_IN
)
15982 || proc
->attr
.function
))
15985 /* TODO: Sort out what can be storage associated, if anything, and include
15986 it here. In principle equivalences should be scanned but it does not
15987 seem to be possible to storage associate an impure variable this way. */
15992 /* Test whether a symbol is pure or not. For a NULL pointer, checks if the
15993 current namespace is inside a pure procedure. */
15996 gfc_pure (gfc_symbol
*sym
)
15998 symbol_attribute attr
;
16003 /* Check if the current namespace or one of its parents
16004 belongs to a pure procedure. */
16005 for (ns
= gfc_current_ns
; ns
; ns
= ns
->parent
)
16007 sym
= ns
->proc_name
;
16011 if (attr
.flavor
== FL_PROCEDURE
&& attr
.pure
)
16019 return attr
.flavor
== FL_PROCEDURE
&& attr
.pure
;
16023 /* Test whether a symbol is implicitly pure or not. For a NULL pointer,
16024 checks if the current namespace is implicitly pure. Note that this
16025 function returns false for a PURE procedure. */
16028 gfc_implicit_pure (gfc_symbol
*sym
)
16034 /* Check if the current procedure is implicit_pure. Walk up
16035 the procedure list until we find a procedure. */
16036 for (ns
= gfc_current_ns
; ns
; ns
= ns
->parent
)
16038 sym
= ns
->proc_name
;
16042 if (sym
->attr
.flavor
== FL_PROCEDURE
)
16047 return sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.implicit_pure
16048 && !sym
->attr
.pure
;
16053 gfc_unset_implicit_pure (gfc_symbol
*sym
)
16059 /* Check if the current procedure is implicit_pure. Walk up
16060 the procedure list until we find a procedure. */
16061 for (ns
= gfc_current_ns
; ns
; ns
= ns
->parent
)
16063 sym
= ns
->proc_name
;
16067 if (sym
->attr
.flavor
== FL_PROCEDURE
)
16072 if (sym
->attr
.flavor
== FL_PROCEDURE
)
16073 sym
->attr
.implicit_pure
= 0;
16075 sym
->attr
.pure
= 0;
16079 /* Test whether the current procedure is elemental or not. */
16082 gfc_elemental (gfc_symbol
*sym
)
16084 symbol_attribute attr
;
16087 sym
= gfc_current_ns
->proc_name
;
16092 return attr
.flavor
== FL_PROCEDURE
&& attr
.elemental
;
16096 /* Warn about unused labels. */
16099 warn_unused_fortran_label (gfc_st_label
*label
)
16104 warn_unused_fortran_label (label
->left
);
16106 if (label
->defined
== ST_LABEL_UNKNOWN
)
16109 switch (label
->referenced
)
16111 case ST_LABEL_UNKNOWN
:
16112 gfc_warning (OPT_Wunused_label
, "Label %d at %L defined but not used",
16113 label
->value
, &label
->where
);
16116 case ST_LABEL_BAD_TARGET
:
16117 gfc_warning (OPT_Wunused_label
,
16118 "Label %d at %L defined but cannot be used",
16119 label
->value
, &label
->where
);
16126 warn_unused_fortran_label (label
->right
);
16130 /* Returns the sequence type of a symbol or sequence. */
16133 sequence_type (gfc_typespec ts
)
16142 if (ts
.u
.derived
->components
== NULL
)
16143 return SEQ_NONDEFAULT
;
16145 result
= sequence_type (ts
.u
.derived
->components
->ts
);
16146 for (c
= ts
.u
.derived
->components
->next
; c
; c
= c
->next
)
16147 if (sequence_type (c
->ts
) != result
)
16153 if (ts
.kind
!= gfc_default_character_kind
)
16154 return SEQ_NONDEFAULT
;
16156 return SEQ_CHARACTER
;
16159 if (ts
.kind
!= gfc_default_integer_kind
)
16160 return SEQ_NONDEFAULT
;
16162 return SEQ_NUMERIC
;
16165 if (!(ts
.kind
== gfc_default_real_kind
16166 || ts
.kind
== gfc_default_double_kind
))
16167 return SEQ_NONDEFAULT
;
16169 return SEQ_NUMERIC
;
16172 if (ts
.kind
!= gfc_default_complex_kind
)
16173 return SEQ_NONDEFAULT
;
16175 return SEQ_NUMERIC
;
16178 if (ts
.kind
!= gfc_default_logical_kind
)
16179 return SEQ_NONDEFAULT
;
16181 return SEQ_NUMERIC
;
16184 return SEQ_NONDEFAULT
;
16189 /* Resolve derived type EQUIVALENCE object. */
16192 resolve_equivalence_derived (gfc_symbol
*derived
, gfc_symbol
*sym
, gfc_expr
*e
)
16194 gfc_component
*c
= derived
->components
;
16199 /* Shall not be an object of nonsequence derived type. */
16200 if (!derived
->attr
.sequence
)
16202 gfc_error ("Derived type variable %qs at %L must have SEQUENCE "
16203 "attribute to be an EQUIVALENCE object", sym
->name
,
16208 /* Shall not have allocatable components. */
16209 if (derived
->attr
.alloc_comp
)
16211 gfc_error ("Derived type variable %qs at %L cannot have ALLOCATABLE "
16212 "components to be an EQUIVALENCE object",sym
->name
,
16217 if (sym
->attr
.in_common
&& gfc_has_default_initializer (sym
->ts
.u
.derived
))
16219 gfc_error ("Derived type variable %qs at %L with default "
16220 "initialization cannot be in EQUIVALENCE with a variable "
16221 "in COMMON", sym
->name
, &e
->where
);
16225 for (; c
; c
= c
->next
)
16227 if (gfc_bt_struct (c
->ts
.type
)
16228 && (!resolve_equivalence_derived(c
->ts
.u
.derived
, sym
, e
)))
16231 /* Shall not be an object of sequence derived type containing a pointer
16232 in the structure. */
16233 if (c
->attr
.pointer
)
16235 gfc_error ("Derived type variable %qs at %L with pointer "
16236 "component(s) cannot be an EQUIVALENCE object",
16237 sym
->name
, &e
->where
);
16245 /* Resolve equivalence object.
16246 An EQUIVALENCE object shall not be a dummy argument, a pointer, a target,
16247 an allocatable array, an object of nonsequence derived type, an object of
16248 sequence derived type containing a pointer at any level of component
16249 selection, an automatic object, a function name, an entry name, a result
16250 name, a named constant, a structure component, or a subobject of any of
16251 the preceding objects. A substring shall not have length zero. A
16252 derived type shall not have components with default initialization nor
16253 shall two objects of an equivalence group be initialized.
16254 Either all or none of the objects shall have an protected attribute.
16255 The simple constraints are done in symbol.c(check_conflict) and the rest
16256 are implemented here. */
16259 resolve_equivalence (gfc_equiv
*eq
)
16262 gfc_symbol
*first_sym
;
16265 locus
*last_where
= NULL
;
16266 seq_type eq_type
, last_eq_type
;
16267 gfc_typespec
*last_ts
;
16268 int object
, cnt_protected
;
16271 last_ts
= &eq
->expr
->symtree
->n
.sym
->ts
;
16273 first_sym
= eq
->expr
->symtree
->n
.sym
;
16277 for (object
= 1; eq
; eq
= eq
->eq
, object
++)
16281 e
->ts
= e
->symtree
->n
.sym
->ts
;
16282 /* match_varspec might not know yet if it is seeing
16283 array reference or substring reference, as it doesn't
16285 if (e
->ref
&& e
->ref
->type
== REF_ARRAY
)
16287 gfc_ref
*ref
= e
->ref
;
16288 sym
= e
->symtree
->n
.sym
;
16290 if (sym
->attr
.dimension
)
16292 ref
->u
.ar
.as
= sym
->as
;
16296 /* For substrings, convert REF_ARRAY into REF_SUBSTRING. */
16297 if (e
->ts
.type
== BT_CHARACTER
16299 && ref
->type
== REF_ARRAY
16300 && ref
->u
.ar
.dimen
== 1
16301 && ref
->u
.ar
.dimen_type
[0] == DIMEN_RANGE
16302 && ref
->u
.ar
.stride
[0] == NULL
)
16304 gfc_expr
*start
= ref
->u
.ar
.start
[0];
16305 gfc_expr
*end
= ref
->u
.ar
.end
[0];
16308 /* Optimize away the (:) reference. */
16309 if (start
== NULL
&& end
== NULL
)
16312 e
->ref
= ref
->next
;
16314 e
->ref
->next
= ref
->next
;
16319 ref
->type
= REF_SUBSTRING
;
16321 start
= gfc_get_int_expr (gfc_charlen_int_kind
,
16323 ref
->u
.ss
.start
= start
;
16324 if (end
== NULL
&& e
->ts
.u
.cl
)
16325 end
= gfc_copy_expr (e
->ts
.u
.cl
->length
);
16326 ref
->u
.ss
.end
= end
;
16327 ref
->u
.ss
.length
= e
->ts
.u
.cl
;
16334 /* Any further ref is an error. */
16337 gcc_assert (ref
->type
== REF_ARRAY
);
16338 gfc_error ("Syntax error in EQUIVALENCE statement at %L",
16344 if (!gfc_resolve_expr (e
))
16347 sym
= e
->symtree
->n
.sym
;
16349 if (sym
->attr
.is_protected
)
16351 if (cnt_protected
> 0 && cnt_protected
!= object
)
16353 gfc_error ("Either all or none of the objects in the "
16354 "EQUIVALENCE set at %L shall have the "
16355 "PROTECTED attribute",
16360 /* Shall not equivalence common block variables in a PURE procedure. */
16361 if (sym
->ns
->proc_name
16362 && sym
->ns
->proc_name
->attr
.pure
16363 && sym
->attr
.in_common
)
16365 /* Need to check for symbols that may have entered the pure
16366 procedure via a USE statement. */
16367 bool saw_sym
= false;
16368 if (sym
->ns
->use_stmts
)
16371 for (r
= sym
->ns
->use_stmts
->rename
; r
; r
= r
->next
)
16372 if (strcmp(r
->use_name
, sym
->name
) == 0) saw_sym
= true;
16378 gfc_error ("COMMON block member %qs at %L cannot be an "
16379 "EQUIVALENCE object in the pure procedure %qs",
16380 sym
->name
, &e
->where
, sym
->ns
->proc_name
->name
);
16384 /* Shall not be a named constant. */
16385 if (e
->expr_type
== EXPR_CONSTANT
)
16387 gfc_error ("Named constant %qs at %L cannot be an EQUIVALENCE "
16388 "object", sym
->name
, &e
->where
);
16392 if (e
->ts
.type
== BT_DERIVED
16393 && !resolve_equivalence_derived (e
->ts
.u
.derived
, sym
, e
))
16396 /* Check that the types correspond correctly:
16398 A numeric sequence structure may be equivalenced to another sequence
16399 structure, an object of default integer type, default real type, double
16400 precision real type, default logical type such that components of the
16401 structure ultimately only become associated to objects of the same
16402 kind. A character sequence structure may be equivalenced to an object
16403 of default character kind or another character sequence structure.
16404 Other objects may be equivalenced only to objects of the same type and
16405 kind parameters. */
16407 /* Identical types are unconditionally OK. */
16408 if (object
== 1 || gfc_compare_types (last_ts
, &sym
->ts
))
16409 goto identical_types
;
16411 last_eq_type
= sequence_type (*last_ts
);
16412 eq_type
= sequence_type (sym
->ts
);
16414 /* Since the pair of objects is not of the same type, mixed or
16415 non-default sequences can be rejected. */
16417 msg
= "Sequence %s with mixed components in EQUIVALENCE "
16418 "statement at %L with different type objects";
16420 && last_eq_type
== SEQ_MIXED
16421 && !gfc_notify_std (GFC_STD_GNU
, msg
, first_sym
->name
, last_where
))
16422 || (eq_type
== SEQ_MIXED
16423 && !gfc_notify_std (GFC_STD_GNU
, msg
, sym
->name
, &e
->where
)))
16426 msg
= "Non-default type object or sequence %s in EQUIVALENCE "
16427 "statement at %L with objects of different type";
16429 && last_eq_type
== SEQ_NONDEFAULT
16430 && !gfc_notify_std (GFC_STD_GNU
, msg
, first_sym
->name
, last_where
))
16431 || (eq_type
== SEQ_NONDEFAULT
16432 && !gfc_notify_std (GFC_STD_GNU
, msg
, sym
->name
, &e
->where
)))
16435 msg
="Non-CHARACTER object %qs in default CHARACTER "
16436 "EQUIVALENCE statement at %L";
16437 if (last_eq_type
== SEQ_CHARACTER
16438 && eq_type
!= SEQ_CHARACTER
16439 && !gfc_notify_std (GFC_STD_GNU
, msg
, sym
->name
, &e
->where
))
16442 msg
="Non-NUMERIC object %qs in default NUMERIC "
16443 "EQUIVALENCE statement at %L";
16444 if (last_eq_type
== SEQ_NUMERIC
16445 && eq_type
!= SEQ_NUMERIC
16446 && !gfc_notify_std (GFC_STD_GNU
, msg
, sym
->name
, &e
->where
))
16451 last_where
= &e
->where
;
16456 /* Shall not be an automatic array. */
16457 if (e
->ref
->type
== REF_ARRAY
16458 && !gfc_resolve_array_spec (e
->ref
->u
.ar
.as
, 1))
16460 gfc_error ("Array %qs at %L with non-constant bounds cannot be "
16461 "an EQUIVALENCE object", sym
->name
, &e
->where
);
16468 /* Shall not be a structure component. */
16469 if (r
->type
== REF_COMPONENT
)
16471 gfc_error ("Structure component %qs at %L cannot be an "
16472 "EQUIVALENCE object",
16473 r
->u
.c
.component
->name
, &e
->where
);
16477 /* A substring shall not have length zero. */
16478 if (r
->type
== REF_SUBSTRING
)
16480 if (compare_bound (r
->u
.ss
.start
, r
->u
.ss
.end
) == CMP_GT
)
16482 gfc_error ("Substring at %L has length zero",
16483 &r
->u
.ss
.start
->where
);
16493 /* Function called by resolve_fntype to flag other symbol used in the
16494 length type parameter specification of function resuls. */
16497 flag_fn_result_spec (gfc_expr
*expr
,
16499 int *f ATTRIBUTE_UNUSED
)
16504 if (expr
->expr_type
== EXPR_VARIABLE
)
16506 s
= expr
->symtree
->n
.sym
;
16507 for (ns
= s
->ns
; ns
; ns
= ns
->parent
)
16513 gfc_error ("Self reference in character length expression "
16514 "for %qs at %L", sym
->name
, &expr
->where
);
16518 if (!s
->fn_result_spec
16519 && s
->attr
.flavor
== FL_PARAMETER
)
16521 /* Function contained in a module.... */
16522 if (ns
->proc_name
&& ns
->proc_name
->attr
.flavor
== FL_MODULE
)
16525 s
->fn_result_spec
= 1;
16526 /* Make sure that this symbol is translated as a module
16528 st
= gfc_get_unique_symtree (ns
);
16532 /* ... which is use associated and called. */
16533 else if (s
->attr
.use_assoc
|| s
->attr
.used_in_submodule
16535 /* External function matched with an interface. */
16538 && s
->ns
->proc_name
->attr
.if_source
== IFSRC_DECL
)
16539 || s
->ns
->proc_name
->attr
.if_source
== IFSRC_IFBODY
)
16540 && s
->ns
->proc_name
->attr
.function
))
16541 s
->fn_result_spec
= 1;
16548 /* Resolve function and ENTRY types, issue diagnostics if needed. */
16551 resolve_fntype (gfc_namespace
*ns
)
16553 gfc_entry_list
*el
;
16556 if (ns
->proc_name
== NULL
|| !ns
->proc_name
->attr
.function
)
16559 /* If there are any entries, ns->proc_name is the entry master
16560 synthetic symbol and ns->entries->sym actual FUNCTION symbol. */
16562 sym
= ns
->entries
->sym
;
16564 sym
= ns
->proc_name
;
16565 if (sym
->result
== sym
16566 && sym
->ts
.type
== BT_UNKNOWN
16567 && !gfc_set_default_type (sym
, 0, NULL
)
16568 && !sym
->attr
.untyped
)
16570 gfc_error ("Function %qs at %L has no IMPLICIT type",
16571 sym
->name
, &sym
->declared_at
);
16572 sym
->attr
.untyped
= 1;
16575 if (sym
->ts
.type
== BT_DERIVED
&& !sym
->ts
.u
.derived
->attr
.use_assoc
16576 && !sym
->attr
.contained
16577 && !gfc_check_symbol_access (sym
->ts
.u
.derived
)
16578 && gfc_check_symbol_access (sym
))
16580 gfc_notify_std (GFC_STD_F2003
, "PUBLIC function %qs at "
16581 "%L of PRIVATE type %qs", sym
->name
,
16582 &sym
->declared_at
, sym
->ts
.u
.derived
->name
);
16586 for (el
= ns
->entries
->next
; el
; el
= el
->next
)
16588 if (el
->sym
->result
== el
->sym
16589 && el
->sym
->ts
.type
== BT_UNKNOWN
16590 && !gfc_set_default_type (el
->sym
, 0, NULL
)
16591 && !el
->sym
->attr
.untyped
)
16593 gfc_error ("ENTRY %qs at %L has no IMPLICIT type",
16594 el
->sym
->name
, &el
->sym
->declared_at
);
16595 el
->sym
->attr
.untyped
= 1;
16599 if (sym
->ts
.type
== BT_CHARACTER
)
16600 gfc_traverse_expr (sym
->ts
.u
.cl
->length
, sym
, flag_fn_result_spec
, 0);
16604 /* 12.3.2.1.1 Defined operators. */
16607 check_uop_procedure (gfc_symbol
*sym
, locus where
)
16609 gfc_formal_arglist
*formal
;
16611 if (!sym
->attr
.function
)
16613 gfc_error ("User operator procedure %qs at %L must be a FUNCTION",
16614 sym
->name
, &where
);
16618 if (sym
->ts
.type
== BT_CHARACTER
16619 && !((sym
->ts
.u
.cl
&& sym
->ts
.u
.cl
->length
) || sym
->ts
.deferred
)
16620 && !(sym
->result
&& ((sym
->result
->ts
.u
.cl
16621 && sym
->result
->ts
.u
.cl
->length
) || sym
->result
->ts
.deferred
)))
16623 gfc_error ("User operator procedure %qs at %L cannot be assumed "
16624 "character length", sym
->name
, &where
);
16628 formal
= gfc_sym_get_dummy_args (sym
);
16629 if (!formal
|| !formal
->sym
)
16631 gfc_error ("User operator procedure %qs at %L must have at least "
16632 "one argument", sym
->name
, &where
);
16636 if (formal
->sym
->attr
.intent
!= INTENT_IN
)
16638 gfc_error ("First argument of operator interface at %L must be "
16639 "INTENT(IN)", &where
);
16643 if (formal
->sym
->attr
.optional
)
16645 gfc_error ("First argument of operator interface at %L cannot be "
16646 "optional", &where
);
16650 formal
= formal
->next
;
16651 if (!formal
|| !formal
->sym
)
16654 if (formal
->sym
->attr
.intent
!= INTENT_IN
)
16656 gfc_error ("Second argument of operator interface at %L must be "
16657 "INTENT(IN)", &where
);
16661 if (formal
->sym
->attr
.optional
)
16663 gfc_error ("Second argument of operator interface at %L cannot be "
16664 "optional", &where
);
16670 gfc_error ("Operator interface at %L must have, at most, two "
16671 "arguments", &where
);
16679 gfc_resolve_uops (gfc_symtree
*symtree
)
16681 gfc_interface
*itr
;
16683 if (symtree
== NULL
)
16686 gfc_resolve_uops (symtree
->left
);
16687 gfc_resolve_uops (symtree
->right
);
16689 for (itr
= symtree
->n
.uop
->op
; itr
; itr
= itr
->next
)
16690 check_uop_procedure (itr
->sym
, itr
->sym
->declared_at
);
16694 /* Examine all of the expressions associated with a program unit,
16695 assign types to all intermediate expressions, make sure that all
16696 assignments are to compatible types and figure out which names
16697 refer to which functions or subroutines. It doesn't check code
16698 block, which is handled by gfc_resolve_code. */
16701 resolve_types (gfc_namespace
*ns
)
16707 gfc_namespace
* old_ns
= gfc_current_ns
;
16709 if (ns
->types_resolved
)
16712 /* Check that all IMPLICIT types are ok. */
16713 if (!ns
->seen_implicit_none
)
16716 for (letter
= 0; letter
!= GFC_LETTERS
; ++letter
)
16717 if (ns
->set_flag
[letter
]
16718 && !resolve_typespec_used (&ns
->default_type
[letter
],
16719 &ns
->implicit_loc
[letter
], NULL
))
16723 gfc_current_ns
= ns
;
16725 resolve_entries (ns
);
16727 resolve_common_vars (&ns
->blank_common
, false);
16728 resolve_common_blocks (ns
->common_root
);
16730 resolve_contained_functions (ns
);
16732 if (ns
->proc_name
&& ns
->proc_name
->attr
.flavor
== FL_PROCEDURE
16733 && ns
->proc_name
->attr
.if_source
== IFSRC_IFBODY
)
16734 resolve_formal_arglist (ns
->proc_name
);
16736 gfc_traverse_ns (ns
, resolve_bind_c_derived_types
);
16738 for (cl
= ns
->cl_list
; cl
; cl
= cl
->next
)
16739 resolve_charlen (cl
);
16741 gfc_traverse_ns (ns
, resolve_symbol
);
16743 resolve_fntype (ns
);
16745 for (n
= ns
->contained
; n
; n
= n
->sibling
)
16747 if (gfc_pure (ns
->proc_name
) && !gfc_pure (n
->proc_name
))
16748 gfc_error ("Contained procedure %qs at %L of a PURE procedure must "
16749 "also be PURE", n
->proc_name
->name
,
16750 &n
->proc_name
->declared_at
);
16756 gfc_do_concurrent_flag
= 0;
16757 gfc_check_interfaces (ns
);
16759 gfc_traverse_ns (ns
, resolve_values
);
16761 if (ns
->save_all
|| !flag_automatic
)
16765 for (d
= ns
->data
; d
; d
= d
->next
)
16769 gfc_traverse_ns (ns
, gfc_formalize_init_value
);
16771 gfc_traverse_ns (ns
, gfc_verify_binding_labels
);
16773 for (eq
= ns
->equiv
; eq
; eq
= eq
->next
)
16774 resolve_equivalence (eq
);
16776 /* Warn about unused labels. */
16777 if (warn_unused_label
)
16778 warn_unused_fortran_label (ns
->st_labels
);
16780 gfc_resolve_uops (ns
->uop_root
);
16782 gfc_traverse_ns (ns
, gfc_verify_DTIO_procedures
);
16784 gfc_resolve_omp_declare_simd (ns
);
16786 gfc_resolve_omp_udrs (ns
->omp_udr_root
);
16788 ns
->types_resolved
= 1;
16790 gfc_current_ns
= old_ns
;
16794 /* Call gfc_resolve_code recursively. */
16797 resolve_codes (gfc_namespace
*ns
)
16800 bitmap_obstack old_obstack
;
16802 if (ns
->resolved
== 1)
16805 for (n
= ns
->contained
; n
; n
= n
->sibling
)
16808 gfc_current_ns
= ns
;
16810 /* Don't clear 'cs_base' if this is the namespace of a BLOCK construct. */
16811 if (!(ns
->proc_name
&& ns
->proc_name
->attr
.flavor
== FL_LABEL
))
16814 /* Set to an out of range value. */
16815 current_entry_id
= -1;
16817 old_obstack
= labels_obstack
;
16818 bitmap_obstack_initialize (&labels_obstack
);
16820 gfc_resolve_oacc_declare (ns
);
16821 gfc_resolve_oacc_routines (ns
);
16822 gfc_resolve_omp_local_vars (ns
);
16823 gfc_resolve_code (ns
->code
, ns
);
16825 bitmap_obstack_release (&labels_obstack
);
16826 labels_obstack
= old_obstack
;
16830 /* This function is called after a complete program unit has been compiled.
16831 Its purpose is to examine all of the expressions associated with a program
16832 unit, assign types to all intermediate expressions, make sure that all
16833 assignments are to compatible types and figure out which names refer to
16834 which functions or subroutines. */
16837 gfc_resolve (gfc_namespace
*ns
)
16839 gfc_namespace
*old_ns
;
16840 code_stack
*old_cs_base
;
16841 struct gfc_omp_saved_state old_omp_state
;
16847 old_ns
= gfc_current_ns
;
16848 old_cs_base
= cs_base
;
16850 /* As gfc_resolve can be called during resolution of an OpenMP construct
16851 body, we should clear any state associated to it, so that say NS's
16852 DO loops are not interpreted as OpenMP loops. */
16853 if (!ns
->construct_entities
)
16854 gfc_omp_save_and_clear_state (&old_omp_state
);
16856 resolve_types (ns
);
16857 component_assignment_level
= 0;
16858 resolve_codes (ns
);
16860 gfc_current_ns
= old_ns
;
16861 cs_base
= old_cs_base
;
16864 gfc_run_passes (ns
);
16866 if (!ns
->construct_entities
)
16867 gfc_omp_restore_state (&old_omp_state
);