1 /* Perform type resolution on the various structures.
2 Copyright (C) 2001-2018 Free Software Foundation, Inc.
3 Contributed by Andy Vaught
5 This file is part of GCC.
7 GCC is free software; you can redistribute it and/or modify it under
8 the terms of the GNU General Public License as published by the Free
9 Software Foundation; either version 3, or (at your option) any later
12 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
13 WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
17 You should have received a copy of the GNU General Public License
18 along with GCC; see the file COPYING3. If not see
19 <http://www.gnu.org/licenses/>. */
23 #include "coretypes.h"
27 #include "arith.h" /* For gfc_compare_expr(). */
28 #include "dependency.h"
30 #include "target-memory.h" /* for gfc_simplify_transfer */
31 #include "constructor.h"
33 /* Types used in equivalence statements. */
37 SEQ_NONDEFAULT
, SEQ_NUMERIC
, SEQ_CHARACTER
, SEQ_MIXED
40 /* Stack to keep track of the nesting of blocks as we move through the
41 code. See resolve_branch() and gfc_resolve_code(). */
43 typedef struct code_stack
45 struct gfc_code
*head
, *current
;
46 struct code_stack
*prev
;
48 /* This bitmap keeps track of the targets valid for a branch from
49 inside this block except for END {IF|SELECT}s of enclosing
51 bitmap reachable_labels
;
55 static code_stack
*cs_base
= NULL
;
58 /* Nonzero if we're inside a FORALL or DO CONCURRENT block. */
60 static int forall_flag
;
61 int gfc_do_concurrent_flag
;
63 /* True when we are resolving an expression that is an actual argument to
65 static bool actual_arg
= false;
66 /* True when we are resolving an expression that is the first actual argument
68 static bool first_actual_arg
= false;
71 /* Nonzero if we're inside a OpenMP WORKSHARE or PARALLEL WORKSHARE block. */
73 static int omp_workshare_flag
;
75 /* True if we are processing a formal arglist. The corresponding function
76 resets the flag each time that it is read. */
77 static bool formal_arg_flag
= false;
79 /* True if we are resolving a specification expression. */
80 static bool specification_expr
= false;
82 /* The id of the last entry seen. */
83 static int current_entry_id
;
85 /* We use bitmaps to determine if a branch target is valid. */
86 static bitmap_obstack labels_obstack
;
88 /* True when simplifying a EXPR_VARIABLE argument to an inquiry function. */
89 static bool inquiry_argument
= false;
93 gfc_is_formal_arg (void)
95 return formal_arg_flag
;
98 /* Is the symbol host associated? */
100 is_sym_host_assoc (gfc_symbol
*sym
, gfc_namespace
*ns
)
102 for (ns
= ns
->parent
; ns
; ns
= ns
->parent
)
111 /* Ensure a typespec used is valid; for instance, TYPE(t) is invalid if t is
112 an ABSTRACT derived-type. If where is not NULL, an error message with that
113 locus is printed, optionally using name. */
116 resolve_typespec_used (gfc_typespec
* ts
, locus
* where
, const char* name
)
118 if (ts
->type
== BT_DERIVED
&& ts
->u
.derived
->attr
.abstract
)
123 gfc_error ("%qs at %L is of the ABSTRACT type %qs",
124 name
, where
, ts
->u
.derived
->name
);
126 gfc_error ("ABSTRACT type %qs used at %L",
127 ts
->u
.derived
->name
, where
);
138 check_proc_interface (gfc_symbol
*ifc
, locus
*where
)
140 /* Several checks for F08:C1216. */
141 if (ifc
->attr
.procedure
)
143 gfc_error ("Interface %qs at %L is declared "
144 "in a later PROCEDURE statement", ifc
->name
, where
);
149 /* For generic interfaces, check if there is
150 a specific procedure with the same name. */
151 gfc_interface
*gen
= ifc
->generic
;
152 while (gen
&& strcmp (gen
->sym
->name
, ifc
->name
) != 0)
156 gfc_error ("Interface %qs at %L may not be generic",
161 if (ifc
->attr
.proc
== PROC_ST_FUNCTION
)
163 gfc_error ("Interface %qs at %L may not be a statement function",
167 if (gfc_is_intrinsic (ifc
, 0, ifc
->declared_at
)
168 || gfc_is_intrinsic (ifc
, 1, ifc
->declared_at
))
169 ifc
->attr
.intrinsic
= 1;
170 if (ifc
->attr
.intrinsic
&& !gfc_intrinsic_actual_ok (ifc
->name
, 0))
172 gfc_error ("Intrinsic procedure %qs not allowed in "
173 "PROCEDURE statement at %L", ifc
->name
, where
);
176 if (!ifc
->attr
.if_source
&& !ifc
->attr
.intrinsic
&& ifc
->name
[0] != '\0')
178 gfc_error ("Interface %qs at %L must be explicit", ifc
->name
, where
);
185 static void resolve_symbol (gfc_symbol
*sym
);
188 /* Resolve the interface for a PROCEDURE declaration or procedure pointer. */
191 resolve_procedure_interface (gfc_symbol
*sym
)
193 gfc_symbol
*ifc
= sym
->ts
.interface
;
200 gfc_error ("PROCEDURE %qs at %L may not be used as its own interface",
201 sym
->name
, &sym
->declared_at
);
204 if (!check_proc_interface (ifc
, &sym
->declared_at
))
207 if (ifc
->attr
.if_source
|| ifc
->attr
.intrinsic
)
209 /* Resolve interface and copy attributes. */
210 resolve_symbol (ifc
);
211 if (ifc
->attr
.intrinsic
)
212 gfc_resolve_intrinsic (ifc
, &ifc
->declared_at
);
216 sym
->ts
= ifc
->result
->ts
;
217 sym
->attr
.allocatable
= ifc
->result
->attr
.allocatable
;
218 sym
->attr
.pointer
= ifc
->result
->attr
.pointer
;
219 sym
->attr
.dimension
= ifc
->result
->attr
.dimension
;
220 sym
->attr
.class_ok
= ifc
->result
->attr
.class_ok
;
221 sym
->as
= gfc_copy_array_spec (ifc
->result
->as
);
227 sym
->attr
.allocatable
= ifc
->attr
.allocatable
;
228 sym
->attr
.pointer
= ifc
->attr
.pointer
;
229 sym
->attr
.dimension
= ifc
->attr
.dimension
;
230 sym
->attr
.class_ok
= ifc
->attr
.class_ok
;
231 sym
->as
= gfc_copy_array_spec (ifc
->as
);
233 sym
->ts
.interface
= ifc
;
234 sym
->attr
.function
= ifc
->attr
.function
;
235 sym
->attr
.subroutine
= ifc
->attr
.subroutine
;
237 sym
->attr
.pure
= ifc
->attr
.pure
;
238 sym
->attr
.elemental
= ifc
->attr
.elemental
;
239 sym
->attr
.contiguous
= ifc
->attr
.contiguous
;
240 sym
->attr
.recursive
= ifc
->attr
.recursive
;
241 sym
->attr
.always_explicit
= ifc
->attr
.always_explicit
;
242 sym
->attr
.ext_attr
|= ifc
->attr
.ext_attr
;
243 sym
->attr
.is_bind_c
= ifc
->attr
.is_bind_c
;
244 /* Copy char length. */
245 if (ifc
->ts
.type
== BT_CHARACTER
&& ifc
->ts
.u
.cl
)
247 sym
->ts
.u
.cl
= gfc_new_charlen (sym
->ns
, ifc
->ts
.u
.cl
);
248 if (sym
->ts
.u
.cl
->length
&& !sym
->ts
.u
.cl
->resolved
249 && !gfc_resolve_expr (sym
->ts
.u
.cl
->length
))
258 /* Resolve types of formal argument lists. These have to be done early so that
259 the formal argument lists of module procedures can be copied to the
260 containing module before the individual procedures are resolved
261 individually. We also resolve argument lists of procedures in interface
262 blocks because they are self-contained scoping units.
264 Since a dummy argument cannot be a non-dummy procedure, the only
265 resort left for untyped names are the IMPLICIT types. */
268 resolve_formal_arglist (gfc_symbol
*proc
)
270 gfc_formal_arglist
*f
;
272 bool saved_specification_expr
;
275 if (proc
->result
!= NULL
)
280 if (gfc_elemental (proc
)
281 || sym
->attr
.pointer
|| sym
->attr
.allocatable
282 || (sym
->as
&& sym
->as
->rank
!= 0))
284 proc
->attr
.always_explicit
= 1;
285 sym
->attr
.always_explicit
= 1;
288 formal_arg_flag
= true;
290 for (f
= proc
->formal
; f
; f
= f
->next
)
298 /* Alternate return placeholder. */
299 if (gfc_elemental (proc
))
300 gfc_error ("Alternate return specifier in elemental subroutine "
301 "%qs at %L is not allowed", proc
->name
,
303 if (proc
->attr
.function
)
304 gfc_error ("Alternate return specifier in function "
305 "%qs at %L is not allowed", proc
->name
,
309 else if (sym
->attr
.procedure
&& sym
->attr
.if_source
!= IFSRC_DECL
310 && !resolve_procedure_interface (sym
))
313 if (strcmp (proc
->name
, sym
->name
) == 0)
315 gfc_error ("Self-referential argument "
316 "%qs at %L is not allowed", sym
->name
,
321 if (sym
->attr
.if_source
!= IFSRC_UNKNOWN
)
322 resolve_formal_arglist (sym
);
324 if (sym
->attr
.subroutine
|| sym
->attr
.external
)
326 if (sym
->attr
.flavor
== FL_UNKNOWN
)
327 gfc_add_flavor (&sym
->attr
, FL_PROCEDURE
, sym
->name
, &sym
->declared_at
);
331 if (sym
->ts
.type
== BT_UNKNOWN
&& !proc
->attr
.intrinsic
332 && (!sym
->attr
.function
|| sym
->result
== sym
))
333 gfc_set_default_type (sym
, 1, sym
->ns
);
336 as
= sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
337 ? CLASS_DATA (sym
)->as
: sym
->as
;
339 saved_specification_expr
= specification_expr
;
340 specification_expr
= true;
341 gfc_resolve_array_spec (as
, 0);
342 specification_expr
= saved_specification_expr
;
344 /* We can't tell if an array with dimension (:) is assumed or deferred
345 shape until we know if it has the pointer or allocatable attributes.
347 if (as
&& as
->rank
> 0 && as
->type
== AS_DEFERRED
348 && ((sym
->ts
.type
!= BT_CLASS
349 && !(sym
->attr
.pointer
|| sym
->attr
.allocatable
))
350 || (sym
->ts
.type
== BT_CLASS
351 && !(CLASS_DATA (sym
)->attr
.class_pointer
352 || CLASS_DATA (sym
)->attr
.allocatable
)))
353 && sym
->attr
.flavor
!= FL_PROCEDURE
)
355 as
->type
= AS_ASSUMED_SHAPE
;
356 for (i
= 0; i
< as
->rank
; i
++)
357 as
->lower
[i
] = gfc_get_int_expr (gfc_default_integer_kind
, NULL
, 1);
360 if ((as
&& as
->rank
> 0 && as
->type
== AS_ASSUMED_SHAPE
)
361 || (as
&& as
->type
== AS_ASSUMED_RANK
)
362 || sym
->attr
.pointer
|| sym
->attr
.allocatable
|| sym
->attr
.target
363 || (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
364 && (CLASS_DATA (sym
)->attr
.class_pointer
365 || CLASS_DATA (sym
)->attr
.allocatable
366 || CLASS_DATA (sym
)->attr
.target
))
367 || sym
->attr
.optional
)
369 proc
->attr
.always_explicit
= 1;
371 proc
->result
->attr
.always_explicit
= 1;
374 /* If the flavor is unknown at this point, it has to be a variable.
375 A procedure specification would have already set the type. */
377 if (sym
->attr
.flavor
== FL_UNKNOWN
)
378 gfc_add_flavor (&sym
->attr
, FL_VARIABLE
, sym
->name
, &sym
->declared_at
);
382 if (sym
->attr
.flavor
== FL_PROCEDURE
)
387 gfc_error ("Dummy procedure %qs of PURE procedure at %L must "
388 "also be PURE", sym
->name
, &sym
->declared_at
);
392 else if (!sym
->attr
.pointer
)
394 if (proc
->attr
.function
&& sym
->attr
.intent
!= INTENT_IN
)
397 gfc_notify_std (GFC_STD_F2008
, "Argument %qs"
398 " of pure function %qs at %L with VALUE "
399 "attribute but without INTENT(IN)",
400 sym
->name
, proc
->name
, &sym
->declared_at
);
402 gfc_error ("Argument %qs of pure function %qs at %L must "
403 "be INTENT(IN) or VALUE", sym
->name
, proc
->name
,
407 if (proc
->attr
.subroutine
&& sym
->attr
.intent
== INTENT_UNKNOWN
)
410 gfc_notify_std (GFC_STD_F2008
, "Argument %qs"
411 " of pure subroutine %qs at %L with VALUE "
412 "attribute but without INTENT", sym
->name
,
413 proc
->name
, &sym
->declared_at
);
415 gfc_error ("Argument %qs of pure subroutine %qs at %L "
416 "must have its INTENT specified or have the "
417 "VALUE attribute", sym
->name
, proc
->name
,
423 if (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.intent
== INTENT_OUT
)
425 gfc_error ("INTENT(OUT) argument %qs of pure procedure %qs at %L"
426 " may not be polymorphic", sym
->name
, proc
->name
,
432 if (proc
->attr
.implicit_pure
)
434 if (sym
->attr
.flavor
== FL_PROCEDURE
)
437 proc
->attr
.implicit_pure
= 0;
439 else if (!sym
->attr
.pointer
)
441 if (proc
->attr
.function
&& sym
->attr
.intent
!= INTENT_IN
443 proc
->attr
.implicit_pure
= 0;
445 if (proc
->attr
.subroutine
&& sym
->attr
.intent
== INTENT_UNKNOWN
447 proc
->attr
.implicit_pure
= 0;
451 if (gfc_elemental (proc
))
454 if (sym
->attr
.codimension
455 || (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
)
456 && CLASS_DATA (sym
)->attr
.codimension
))
458 gfc_error ("Coarray dummy argument %qs at %L to elemental "
459 "procedure", sym
->name
, &sym
->declared_at
);
463 if (sym
->as
|| (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
)
464 && CLASS_DATA (sym
)->as
))
466 gfc_error ("Argument %qs of elemental procedure at %L must "
467 "be scalar", sym
->name
, &sym
->declared_at
);
471 if (sym
->attr
.allocatable
472 || (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
)
473 && CLASS_DATA (sym
)->attr
.allocatable
))
475 gfc_error ("Argument %qs of elemental procedure at %L cannot "
476 "have the ALLOCATABLE attribute", sym
->name
,
481 if (sym
->attr
.pointer
482 || (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
)
483 && CLASS_DATA (sym
)->attr
.class_pointer
))
485 gfc_error ("Argument %qs of elemental procedure at %L cannot "
486 "have the POINTER attribute", sym
->name
,
491 if (sym
->attr
.flavor
== FL_PROCEDURE
)
493 gfc_error ("Dummy procedure %qs not allowed in elemental "
494 "procedure %qs at %L", sym
->name
, proc
->name
,
499 /* Fortran 2008 Corrigendum 1, C1290a. */
500 if (sym
->attr
.intent
== INTENT_UNKNOWN
&& !sym
->attr
.value
)
502 gfc_error ("Argument %qs of elemental procedure %qs at %L must "
503 "have its INTENT specified or have the VALUE "
504 "attribute", sym
->name
, proc
->name
,
510 /* Each dummy shall be specified to be scalar. */
511 if (proc
->attr
.proc
== PROC_ST_FUNCTION
)
515 /* F03:C1263 (R1238) The function-name and each dummy-arg-name
516 shall be specified, explicitly or implicitly, to be scalar. */
517 gfc_error ("Argument '%s' of statement function '%s' at %L "
518 "must be scalar", sym
->name
, proc
->name
,
523 if (sym
->ts
.type
== BT_CHARACTER
)
525 gfc_charlen
*cl
= sym
->ts
.u
.cl
;
526 if (!cl
|| !cl
->length
|| cl
->length
->expr_type
!= EXPR_CONSTANT
)
528 gfc_error ("Character-valued argument %qs of statement "
529 "function at %L must have constant length",
530 sym
->name
, &sym
->declared_at
);
536 formal_arg_flag
= false;
540 /* Work function called when searching for symbols that have argument lists
541 associated with them. */
544 find_arglists (gfc_symbol
*sym
)
546 if (sym
->attr
.if_source
== IFSRC_UNKNOWN
|| sym
->ns
!= gfc_current_ns
547 || gfc_fl_struct (sym
->attr
.flavor
) || sym
->attr
.intrinsic
)
550 resolve_formal_arglist (sym
);
554 /* Given a namespace, resolve all formal argument lists within the namespace.
558 resolve_formal_arglists (gfc_namespace
*ns
)
563 gfc_traverse_ns (ns
, find_arglists
);
568 resolve_contained_fntype (gfc_symbol
*sym
, gfc_namespace
*ns
)
572 if (sym
&& sym
->attr
.flavor
== FL_PROCEDURE
574 && sym
->ns
->parent
->proc_name
575 && sym
->ns
->parent
->proc_name
->attr
.flavor
== FL_PROCEDURE
576 && !strcmp (sym
->name
, sym
->ns
->parent
->proc_name
->name
))
577 gfc_error ("Contained procedure %qs at %L has the same name as its "
578 "encompassing procedure", sym
->name
, &sym
->declared_at
);
580 /* If this namespace is not a function or an entry master function,
582 if (! sym
|| !(sym
->attr
.function
|| sym
->attr
.flavor
== FL_VARIABLE
)
583 || sym
->attr
.entry_master
)
586 /* Try to find out of what the return type is. */
587 if (sym
->result
->ts
.type
== BT_UNKNOWN
&& sym
->result
->ts
.interface
== NULL
)
589 t
= gfc_set_default_type (sym
->result
, 0, ns
);
591 if (!t
&& !sym
->result
->attr
.untyped
)
593 if (sym
->result
== sym
)
594 gfc_error ("Contained function %qs at %L has no IMPLICIT type",
595 sym
->name
, &sym
->declared_at
);
596 else if (!sym
->result
->attr
.proc_pointer
)
597 gfc_error ("Result %qs of contained function %qs at %L has "
598 "no IMPLICIT type", sym
->result
->name
, sym
->name
,
599 &sym
->result
->declared_at
);
600 sym
->result
->attr
.untyped
= 1;
604 /* Fortran 2008 Draft Standard, page 535, C418, on type-param-value
605 type, lists the only ways a character length value of * can be used:
606 dummy arguments of procedures, named constants, function results and
607 in allocate statements if the allocate_object is an assumed length dummy
608 in external functions. Internal function results and results of module
609 procedures are not on this list, ergo, not permitted. */
611 if (sym
->result
->ts
.type
== BT_CHARACTER
)
613 gfc_charlen
*cl
= sym
->result
->ts
.u
.cl
;
614 if ((!cl
|| !cl
->length
) && !sym
->result
->ts
.deferred
)
616 /* See if this is a module-procedure and adapt error message
619 gcc_assert (ns
->parent
&& ns
->parent
->proc_name
);
620 module_proc
= (ns
->parent
->proc_name
->attr
.flavor
== FL_MODULE
);
622 gfc_error (module_proc
623 ? G_("Character-valued module procedure %qs at %L"
624 " must not be assumed length")
625 : G_("Character-valued internal function %qs at %L"
626 " must not be assumed length"),
627 sym
->name
, &sym
->declared_at
);
633 /* Add NEW_ARGS to the formal argument list of PROC, taking care not to
634 introduce duplicates. */
637 merge_argument_lists (gfc_symbol
*proc
, gfc_formal_arglist
*new_args
)
639 gfc_formal_arglist
*f
, *new_arglist
;
642 for (; new_args
!= NULL
; new_args
= new_args
->next
)
644 new_sym
= new_args
->sym
;
645 /* See if this arg is already in the formal argument list. */
646 for (f
= proc
->formal
; f
; f
= f
->next
)
648 if (new_sym
== f
->sym
)
655 /* Add a new argument. Argument order is not important. */
656 new_arglist
= gfc_get_formal_arglist ();
657 new_arglist
->sym
= new_sym
;
658 new_arglist
->next
= proc
->formal
;
659 proc
->formal
= new_arglist
;
664 /* Flag the arguments that are not present in all entries. */
667 check_argument_lists (gfc_symbol
*proc
, gfc_formal_arglist
*new_args
)
669 gfc_formal_arglist
*f
, *head
;
672 for (f
= proc
->formal
; f
; f
= f
->next
)
677 for (new_args
= head
; new_args
; new_args
= new_args
->next
)
679 if (new_args
->sym
== f
->sym
)
686 f
->sym
->attr
.not_always_present
= 1;
691 /* Resolve alternate entry points. If a symbol has multiple entry points we
692 create a new master symbol for the main routine, and turn the existing
693 symbol into an entry point. */
696 resolve_entries (gfc_namespace
*ns
)
698 gfc_namespace
*old_ns
;
702 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
703 static int master_count
= 0;
705 if (ns
->proc_name
== NULL
)
708 /* No need to do anything if this procedure doesn't have alternate entry
713 /* We may already have resolved alternate entry points. */
714 if (ns
->proc_name
->attr
.entry_master
)
717 /* If this isn't a procedure something has gone horribly wrong. */
718 gcc_assert (ns
->proc_name
->attr
.flavor
== FL_PROCEDURE
);
720 /* Remember the current namespace. */
721 old_ns
= gfc_current_ns
;
725 /* Add the main entry point to the list of entry points. */
726 el
= gfc_get_entry_list ();
727 el
->sym
= ns
->proc_name
;
729 el
->next
= ns
->entries
;
731 ns
->proc_name
->attr
.entry
= 1;
733 /* If it is a module function, it needs to be in the right namespace
734 so that gfc_get_fake_result_decl can gather up the results. The
735 need for this arose in get_proc_name, where these beasts were
736 left in their own namespace, to keep prior references linked to
737 the entry declaration.*/
738 if (ns
->proc_name
->attr
.function
739 && ns
->parent
&& ns
->parent
->proc_name
->attr
.flavor
== FL_MODULE
)
742 /* Do the same for entries where the master is not a module
743 procedure. These are retained in the module namespace because
744 of the module procedure declaration. */
745 for (el
= el
->next
; el
; el
= el
->next
)
746 if (el
->sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
747 && el
->sym
->attr
.mod_proc
)
751 /* Add an entry statement for it. */
752 c
= gfc_get_code (EXEC_ENTRY
);
757 /* Create a new symbol for the master function. */
758 /* Give the internal function a unique name (within this file).
759 Also include the function name so the user has some hope of figuring
760 out what is going on. */
761 snprintf (name
, GFC_MAX_SYMBOL_LEN
, "master.%d.%s",
762 master_count
++, ns
->proc_name
->name
);
763 gfc_get_ha_symbol (name
, &proc
);
764 gcc_assert (proc
!= NULL
);
766 gfc_add_procedure (&proc
->attr
, PROC_INTERNAL
, proc
->name
, NULL
);
767 if (ns
->proc_name
->attr
.subroutine
)
768 gfc_add_subroutine (&proc
->attr
, proc
->name
, NULL
);
772 gfc_typespec
*ts
, *fts
;
773 gfc_array_spec
*as
, *fas
;
774 gfc_add_function (&proc
->attr
, proc
->name
, NULL
);
776 fas
= ns
->entries
->sym
->as
;
777 fas
= fas
? fas
: ns
->entries
->sym
->result
->as
;
778 fts
= &ns
->entries
->sym
->result
->ts
;
779 if (fts
->type
== BT_UNKNOWN
)
780 fts
= gfc_get_default_type (ns
->entries
->sym
->result
->name
, NULL
);
781 for (el
= ns
->entries
->next
; el
; el
= el
->next
)
783 ts
= &el
->sym
->result
->ts
;
785 as
= as
? as
: el
->sym
->result
->as
;
786 if (ts
->type
== BT_UNKNOWN
)
787 ts
= gfc_get_default_type (el
->sym
->result
->name
, NULL
);
789 if (! gfc_compare_types (ts
, fts
)
790 || (el
->sym
->result
->attr
.dimension
791 != ns
->entries
->sym
->result
->attr
.dimension
)
792 || (el
->sym
->result
->attr
.pointer
793 != ns
->entries
->sym
->result
->attr
.pointer
))
795 else if (as
&& fas
&& ns
->entries
->sym
->result
!= el
->sym
->result
796 && gfc_compare_array_spec (as
, fas
) == 0)
797 gfc_error ("Function %s at %L has entries with mismatched "
798 "array specifications", ns
->entries
->sym
->name
,
799 &ns
->entries
->sym
->declared_at
);
800 /* The characteristics need to match and thus both need to have
801 the same string length, i.e. both len=*, or both len=4.
802 Having both len=<variable> is also possible, but difficult to
803 check at compile time. */
804 else if (ts
->type
== BT_CHARACTER
&& ts
->u
.cl
&& fts
->u
.cl
805 && (((ts
->u
.cl
->length
&& !fts
->u
.cl
->length
)
806 ||(!ts
->u
.cl
->length
&& fts
->u
.cl
->length
))
808 && ts
->u
.cl
->length
->expr_type
809 != fts
->u
.cl
->length
->expr_type
)
811 && ts
->u
.cl
->length
->expr_type
== EXPR_CONSTANT
812 && mpz_cmp (ts
->u
.cl
->length
->value
.integer
,
813 fts
->u
.cl
->length
->value
.integer
) != 0)))
814 gfc_notify_std (GFC_STD_GNU
, "Function %s at %L with "
815 "entries returning variables of different "
816 "string lengths", ns
->entries
->sym
->name
,
817 &ns
->entries
->sym
->declared_at
);
822 sym
= ns
->entries
->sym
->result
;
823 /* All result types the same. */
825 if (sym
->attr
.dimension
)
826 gfc_set_array_spec (proc
, gfc_copy_array_spec (sym
->as
), NULL
);
827 if (sym
->attr
.pointer
)
828 gfc_add_pointer (&proc
->attr
, NULL
);
832 /* Otherwise the result will be passed through a union by
834 proc
->attr
.mixed_entry_master
= 1;
835 for (el
= ns
->entries
; el
; el
= el
->next
)
837 sym
= el
->sym
->result
;
838 if (sym
->attr
.dimension
)
840 if (el
== ns
->entries
)
841 gfc_error ("FUNCTION result %s can't be an array in "
842 "FUNCTION %s at %L", sym
->name
,
843 ns
->entries
->sym
->name
, &sym
->declared_at
);
845 gfc_error ("ENTRY result %s can't be an array in "
846 "FUNCTION %s at %L", sym
->name
,
847 ns
->entries
->sym
->name
, &sym
->declared_at
);
849 else if (sym
->attr
.pointer
)
851 if (el
== ns
->entries
)
852 gfc_error ("FUNCTION result %s can't be a POINTER in "
853 "FUNCTION %s at %L", sym
->name
,
854 ns
->entries
->sym
->name
, &sym
->declared_at
);
856 gfc_error ("ENTRY result %s can't be a POINTER in "
857 "FUNCTION %s at %L", sym
->name
,
858 ns
->entries
->sym
->name
, &sym
->declared_at
);
863 if (ts
->type
== BT_UNKNOWN
)
864 ts
= gfc_get_default_type (sym
->name
, NULL
);
868 if (ts
->kind
== gfc_default_integer_kind
)
872 if (ts
->kind
== gfc_default_real_kind
873 || ts
->kind
== gfc_default_double_kind
)
877 if (ts
->kind
== gfc_default_complex_kind
)
881 if (ts
->kind
== gfc_default_logical_kind
)
885 /* We will issue error elsewhere. */
893 if (el
== ns
->entries
)
894 gfc_error ("FUNCTION result %s can't be of type %s "
895 "in FUNCTION %s at %L", sym
->name
,
896 gfc_typename (ts
), ns
->entries
->sym
->name
,
899 gfc_error ("ENTRY result %s can't be of type %s "
900 "in FUNCTION %s at %L", sym
->name
,
901 gfc_typename (ts
), ns
->entries
->sym
->name
,
908 proc
->attr
.access
= ACCESS_PRIVATE
;
909 proc
->attr
.entry_master
= 1;
911 /* Merge all the entry point arguments. */
912 for (el
= ns
->entries
; el
; el
= el
->next
)
913 merge_argument_lists (proc
, el
->sym
->formal
);
915 /* Check the master formal arguments for any that are not
916 present in all entry points. */
917 for (el
= ns
->entries
; el
; el
= el
->next
)
918 check_argument_lists (proc
, el
->sym
->formal
);
920 /* Use the master function for the function body. */
921 ns
->proc_name
= proc
;
923 /* Finalize the new symbols. */
924 gfc_commit_symbols ();
926 /* Restore the original namespace. */
927 gfc_current_ns
= old_ns
;
931 /* Resolve common variables. */
933 resolve_common_vars (gfc_common_head
*common_block
, bool named_common
)
935 gfc_symbol
*csym
= common_block
->head
;
937 for (; csym
; csym
= csym
->common_next
)
939 /* gfc_add_in_common may have been called before, but the reported errors
940 have been ignored to continue parsing.
941 We do the checks again here. */
942 if (!csym
->attr
.use_assoc
)
943 gfc_add_in_common (&csym
->attr
, csym
->name
, &common_block
->where
);
945 if (csym
->value
|| csym
->attr
.data
)
947 if (!csym
->ns
->is_block_data
)
948 gfc_notify_std (GFC_STD_GNU
, "Variable %qs at %L is in COMMON "
949 "but only in BLOCK DATA initialization is "
950 "allowed", csym
->name
, &csym
->declared_at
);
951 else if (!named_common
)
952 gfc_notify_std (GFC_STD_GNU
, "Initialized variable %qs at %L is "
953 "in a blank COMMON but initialization is only "
954 "allowed in named common blocks", csym
->name
,
958 if (UNLIMITED_POLY (csym
))
959 gfc_error_now ("%qs in cannot appear in COMMON at %L "
960 "[F2008:C5100]", csym
->name
, &csym
->declared_at
);
962 if (csym
->ts
.type
!= BT_DERIVED
)
965 if (!(csym
->ts
.u
.derived
->attr
.sequence
966 || csym
->ts
.u
.derived
->attr
.is_bind_c
))
967 gfc_error_now ("Derived type variable %qs in COMMON at %L "
968 "has neither the SEQUENCE nor the BIND(C) "
969 "attribute", csym
->name
, &csym
->declared_at
);
970 if (csym
->ts
.u
.derived
->attr
.alloc_comp
)
971 gfc_error_now ("Derived type variable %qs in COMMON at %L "
972 "has an ultimate component that is "
973 "allocatable", csym
->name
, &csym
->declared_at
);
974 if (gfc_has_default_initializer (csym
->ts
.u
.derived
))
975 gfc_error_now ("Derived type variable %qs in COMMON at %L "
976 "may not have default initializer", csym
->name
,
979 if (csym
->attr
.flavor
== FL_UNKNOWN
&& !csym
->attr
.proc_pointer
)
980 gfc_add_flavor (&csym
->attr
, FL_VARIABLE
, csym
->name
, &csym
->declared_at
);
984 /* Resolve common blocks. */
986 resolve_common_blocks (gfc_symtree
*common_root
)
991 if (common_root
== NULL
)
994 if (common_root
->left
)
995 resolve_common_blocks (common_root
->left
);
996 if (common_root
->right
)
997 resolve_common_blocks (common_root
->right
);
999 resolve_common_vars (common_root
->n
.common
, true);
1001 if (!gfc_notify_std (GFC_STD_F2018_OBS
, "COMMON block at %L",
1002 &common_root
->n
.common
->where
))
1005 /* The common name is a global name - in Fortran 2003 also if it has a
1006 C binding name, since Fortran 2008 only the C binding name is a global
1008 if (!common_root
->n
.common
->binding_label
1009 || gfc_notification_std (GFC_STD_F2008
))
1011 gsym
= gfc_find_gsymbol (gfc_gsym_root
,
1012 common_root
->n
.common
->name
);
1014 if (gsym
&& gfc_notification_std (GFC_STD_F2008
)
1015 && gsym
->type
== GSYM_COMMON
1016 && ((common_root
->n
.common
->binding_label
1017 && (!gsym
->binding_label
1018 || strcmp (common_root
->n
.common
->binding_label
,
1019 gsym
->binding_label
) != 0))
1020 || (!common_root
->n
.common
->binding_label
1021 && gsym
->binding_label
)))
1023 gfc_error ("In Fortran 2003 COMMON %qs block at %L is a global "
1024 "identifier and must thus have the same binding name "
1025 "as the same-named COMMON block at %L: %s vs %s",
1026 common_root
->n
.common
->name
, &common_root
->n
.common
->where
,
1028 common_root
->n
.common
->binding_label
1029 ? common_root
->n
.common
->binding_label
: "(blank)",
1030 gsym
->binding_label
? gsym
->binding_label
: "(blank)");
1034 if (gsym
&& gsym
->type
!= GSYM_COMMON
1035 && !common_root
->n
.common
->binding_label
)
1037 gfc_error ("COMMON block %qs at %L uses the same global identifier "
1039 common_root
->n
.common
->name
, &common_root
->n
.common
->where
,
1043 if (gsym
&& gsym
->type
!= GSYM_COMMON
)
1045 gfc_error ("Fortran 2008: COMMON block %qs with binding label at "
1046 "%L sharing the identifier with global non-COMMON-block "
1047 "entity at %L", common_root
->n
.common
->name
,
1048 &common_root
->n
.common
->where
, &gsym
->where
);
1053 gsym
= gfc_get_gsymbol (common_root
->n
.common
->name
);
1054 gsym
->type
= GSYM_COMMON
;
1055 gsym
->where
= common_root
->n
.common
->where
;
1061 if (common_root
->n
.common
->binding_label
)
1063 gsym
= gfc_find_gsymbol (gfc_gsym_root
,
1064 common_root
->n
.common
->binding_label
);
1065 if (gsym
&& gsym
->type
!= GSYM_COMMON
)
1067 gfc_error ("COMMON block at %L with binding label %qs uses the same "
1068 "global identifier as entity at %L",
1069 &common_root
->n
.common
->where
,
1070 common_root
->n
.common
->binding_label
, &gsym
->where
);
1075 gsym
= gfc_get_gsymbol (common_root
->n
.common
->binding_label
);
1076 gsym
->type
= GSYM_COMMON
;
1077 gsym
->where
= common_root
->n
.common
->where
;
1083 gfc_find_symbol (common_root
->name
, gfc_current_ns
, 0, &sym
);
1087 if (sym
->attr
.flavor
== FL_PARAMETER
)
1088 gfc_error ("COMMON block %qs at %L is used as PARAMETER at %L",
1089 sym
->name
, &common_root
->n
.common
->where
, &sym
->declared_at
);
1091 if (sym
->attr
.external
)
1092 gfc_error ("COMMON block %qs at %L can not 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 gcc_assert (sym
->attr
.flavor
== FL_PROCEDURE
);
1691 /* If we've got an ENTRY, find real procedure. */
1692 if (sym
->attr
.entry
&& sym
->ns
->entries
)
1693 proc_sym
= sym
->ns
->entries
->sym
;
1697 /* If sym is RECURSIVE, all is well of course. */
1698 if (proc_sym
->attr
.recursive
|| flag_recursive
)
1701 /* Find the context procedure's "real" symbol if it has entries.
1702 We look for a procedure symbol, so recurse on the parents if we don't
1703 find one (like in case of a BLOCK construct). */
1704 for (real_context
= context
; ; real_context
= real_context
->parent
)
1706 /* We should find something, eventually! */
1707 gcc_assert (real_context
);
1709 context_proc
= (real_context
->entries
? real_context
->entries
->sym
1710 : real_context
->proc_name
);
1712 /* In some special cases, there may not be a proc_name, like for this
1714 real(bad_kind()) function foo () ...
1715 when checking the call to bad_kind ().
1716 In these cases, we simply return here and assume that the
1721 if (context_proc
->attr
.flavor
!= FL_LABEL
)
1725 /* A call from sym's body to itself is recursion, of course. */
1726 if (context_proc
== proc_sym
)
1729 /* The same is true if context is a contained procedure and sym the
1731 if (context_proc
->attr
.contained
)
1733 gfc_symbol
* parent_proc
;
1735 gcc_assert (context
->parent
);
1736 parent_proc
= (context
->parent
->entries
? context
->parent
->entries
->sym
1737 : context
->parent
->proc_name
);
1739 if (parent_proc
== proc_sym
)
1747 /* Resolve an intrinsic procedure: Set its function/subroutine attribute,
1748 its typespec and formal argument list. */
1751 gfc_resolve_intrinsic (gfc_symbol
*sym
, locus
*loc
)
1753 gfc_intrinsic_sym
* isym
= NULL
;
1759 /* Already resolved. */
1760 if (sym
->from_intmod
&& sym
->ts
.type
!= BT_UNKNOWN
)
1763 /* We already know this one is an intrinsic, so we don't call
1764 gfc_is_intrinsic for full checking but rather use gfc_find_function and
1765 gfc_find_subroutine directly to check whether it is a function or
1768 if (sym
->intmod_sym_id
&& sym
->attr
.subroutine
)
1770 gfc_isym_id id
= gfc_isym_id_by_intmod_sym (sym
);
1771 isym
= gfc_intrinsic_subroutine_by_id (id
);
1773 else if (sym
->intmod_sym_id
)
1775 gfc_isym_id id
= gfc_isym_id_by_intmod_sym (sym
);
1776 isym
= gfc_intrinsic_function_by_id (id
);
1778 else if (!sym
->attr
.subroutine
)
1779 isym
= gfc_find_function (sym
->name
);
1781 if (isym
&& !sym
->attr
.subroutine
)
1783 if (sym
->ts
.type
!= BT_UNKNOWN
&& warn_surprising
1784 && !sym
->attr
.implicit_type
)
1785 gfc_warning (OPT_Wsurprising
,
1786 "Type specified for intrinsic function %qs at %L is"
1787 " ignored", sym
->name
, &sym
->declared_at
);
1789 if (!sym
->attr
.function
&&
1790 !gfc_add_function(&sym
->attr
, sym
->name
, loc
))
1795 else if (isym
|| (isym
= gfc_find_subroutine (sym
->name
)))
1797 if (sym
->ts
.type
!= BT_UNKNOWN
&& !sym
->attr
.implicit_type
)
1799 gfc_error ("Intrinsic subroutine %qs at %L shall not have a type"
1800 " specifier", sym
->name
, &sym
->declared_at
);
1804 if (!sym
->attr
.subroutine
&&
1805 !gfc_add_subroutine(&sym
->attr
, sym
->name
, loc
))
1810 gfc_error ("%qs declared INTRINSIC at %L does not exist", sym
->name
,
1815 gfc_copy_formal_args_intr (sym
, isym
, NULL
);
1817 sym
->attr
.pure
= isym
->pure
;
1818 sym
->attr
.elemental
= isym
->elemental
;
1820 /* Check it is actually available in the standard settings. */
1821 if (!gfc_check_intrinsic_standard (isym
, &symstd
, false, sym
->declared_at
))
1823 gfc_error ("The intrinsic %qs declared INTRINSIC at %L is not "
1824 "available in the current standard settings but %s. Use "
1825 "an appropriate %<-std=*%> option or enable "
1826 "%<-fall-intrinsics%> in order to use it.",
1827 sym
->name
, &sym
->declared_at
, symstd
);
1835 /* Resolve a procedure expression, like passing it to a called procedure or as
1836 RHS for a procedure pointer assignment. */
1839 resolve_procedure_expression (gfc_expr
* expr
)
1843 if (expr
->expr_type
!= EXPR_VARIABLE
)
1845 gcc_assert (expr
->symtree
);
1847 sym
= expr
->symtree
->n
.sym
;
1849 if (sym
->attr
.intrinsic
)
1850 gfc_resolve_intrinsic (sym
, &expr
->where
);
1852 if (sym
->attr
.flavor
!= FL_PROCEDURE
1853 || (sym
->attr
.function
&& sym
->result
== sym
))
1856 /* A non-RECURSIVE procedure that is used as procedure expression within its
1857 own body is in danger of being called recursively. */
1858 if (is_illegal_recursion (sym
, gfc_current_ns
))
1859 gfc_warning (0, "Non-RECURSIVE procedure %qs at %L is possibly calling"
1860 " itself recursively. Declare it RECURSIVE or use"
1861 " %<-frecursive%>", sym
->name
, &expr
->where
);
1867 /* Resolve an actual argument list. Most of the time, this is just
1868 resolving the expressions in the list.
1869 The exception is that we sometimes have to decide whether arguments
1870 that look like procedure arguments are really simple variable
1874 resolve_actual_arglist (gfc_actual_arglist
*arg
, procedure_type ptype
,
1875 bool no_formal_args
)
1878 gfc_symtree
*parent_st
;
1880 gfc_component
*comp
;
1881 int save_need_full_assumed_size
;
1882 bool return_value
= false;
1883 bool actual_arg_sav
= actual_arg
, first_actual_arg_sav
= first_actual_arg
;
1886 first_actual_arg
= true;
1888 for (; arg
; arg
= arg
->next
)
1893 /* Check the label is a valid branching target. */
1896 if (arg
->label
->defined
== ST_LABEL_UNKNOWN
)
1898 gfc_error ("Label %d referenced at %L is never defined",
1899 arg
->label
->value
, &arg
->label
->where
);
1903 first_actual_arg
= false;
1907 if (e
->expr_type
== EXPR_VARIABLE
1908 && e
->symtree
->n
.sym
->attr
.generic
1910 && count_specific_procs (e
) != 1)
1913 if (e
->ts
.type
!= BT_PROCEDURE
)
1915 save_need_full_assumed_size
= need_full_assumed_size
;
1916 if (e
->expr_type
!= EXPR_VARIABLE
)
1917 need_full_assumed_size
= 0;
1918 if (!gfc_resolve_expr (e
))
1920 need_full_assumed_size
= save_need_full_assumed_size
;
1924 /* See if the expression node should really be a variable reference. */
1926 sym
= e
->symtree
->n
.sym
;
1928 if (sym
->attr
.flavor
== FL_PROCEDURE
1929 || sym
->attr
.intrinsic
1930 || sym
->attr
.external
)
1934 /* If a procedure is not already determined to be something else
1935 check if it is intrinsic. */
1936 if (gfc_is_intrinsic (sym
, sym
->attr
.subroutine
, e
->where
))
1937 sym
->attr
.intrinsic
= 1;
1939 if (sym
->attr
.proc
== PROC_ST_FUNCTION
)
1941 gfc_error ("Statement function %qs at %L is not allowed as an "
1942 "actual argument", sym
->name
, &e
->where
);
1945 actual_ok
= gfc_intrinsic_actual_ok (sym
->name
,
1946 sym
->attr
.subroutine
);
1947 if (sym
->attr
.intrinsic
&& actual_ok
== 0)
1949 gfc_error ("Intrinsic %qs at %L is not allowed as an "
1950 "actual argument", sym
->name
, &e
->where
);
1953 if (sym
->attr
.contained
&& !sym
->attr
.use_assoc
1954 && sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
)
1956 if (!gfc_notify_std (GFC_STD_F2008
, "Internal procedure %qs is"
1957 " used as actual argument at %L",
1958 sym
->name
, &e
->where
))
1962 if (sym
->attr
.elemental
&& !sym
->attr
.intrinsic
)
1964 gfc_error ("ELEMENTAL non-INTRINSIC procedure %qs is not "
1965 "allowed as an actual argument at %L", sym
->name
,
1969 /* Check if a generic interface has a specific procedure
1970 with the same name before emitting an error. */
1971 if (sym
->attr
.generic
&& count_specific_procs (e
) != 1)
1974 /* Just in case a specific was found for the expression. */
1975 sym
= e
->symtree
->n
.sym
;
1977 /* If the symbol is the function that names the current (or
1978 parent) scope, then we really have a variable reference. */
1980 if (gfc_is_function_return_value (sym
, sym
->ns
))
1983 /* If all else fails, see if we have a specific intrinsic. */
1984 if (sym
->ts
.type
== BT_UNKNOWN
&& sym
->attr
.intrinsic
)
1986 gfc_intrinsic_sym
*isym
;
1988 isym
= gfc_find_function (sym
->name
);
1989 if (isym
== NULL
|| !isym
->specific
)
1991 gfc_error ("Unable to find a specific INTRINSIC procedure "
1992 "for the reference %qs at %L", sym
->name
,
1997 sym
->attr
.intrinsic
= 1;
1998 sym
->attr
.function
= 1;
2001 if (!gfc_resolve_expr (e
))
2006 /* See if the name is a module procedure in a parent unit. */
2008 if (was_declared (sym
) || sym
->ns
->parent
== NULL
)
2011 if (gfc_find_sym_tree (sym
->name
, sym
->ns
->parent
, 1, &parent_st
))
2013 gfc_error ("Symbol %qs at %L is ambiguous", sym
->name
, &e
->where
);
2017 if (parent_st
== NULL
)
2020 sym
= parent_st
->n
.sym
;
2021 e
->symtree
= parent_st
; /* Point to the right thing. */
2023 if (sym
->attr
.flavor
== FL_PROCEDURE
2024 || sym
->attr
.intrinsic
2025 || sym
->attr
.external
)
2027 if (!gfc_resolve_expr (e
))
2033 e
->expr_type
= EXPR_VARIABLE
;
2035 if ((sym
->as
!= NULL
&& sym
->ts
.type
!= BT_CLASS
)
2036 || (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
2037 && CLASS_DATA (sym
)->as
))
2039 e
->rank
= sym
->ts
.type
== BT_CLASS
2040 ? CLASS_DATA (sym
)->as
->rank
: sym
->as
->rank
;
2041 e
->ref
= gfc_get_ref ();
2042 e
->ref
->type
= REF_ARRAY
;
2043 e
->ref
->u
.ar
.type
= AR_FULL
;
2044 e
->ref
->u
.ar
.as
= sym
->ts
.type
== BT_CLASS
2045 ? CLASS_DATA (sym
)->as
: sym
->as
;
2048 /* Expressions are assigned a default ts.type of BT_PROCEDURE in
2049 primary.c (match_actual_arg). If above code determines that it
2050 is a variable instead, it needs to be resolved as it was not
2051 done at the beginning of this function. */
2052 save_need_full_assumed_size
= need_full_assumed_size
;
2053 if (e
->expr_type
!= EXPR_VARIABLE
)
2054 need_full_assumed_size
= 0;
2055 if (!gfc_resolve_expr (e
))
2057 need_full_assumed_size
= save_need_full_assumed_size
;
2060 /* Check argument list functions %VAL, %LOC and %REF. There is
2061 nothing to do for %REF. */
2062 if (arg
->name
&& arg
->name
[0] == '%')
2064 if (strcmp ("%VAL", arg
->name
) == 0)
2066 if (e
->ts
.type
== BT_CHARACTER
|| e
->ts
.type
== BT_DERIVED
)
2068 gfc_error ("By-value argument at %L is not of numeric "
2075 gfc_error ("By-value argument at %L cannot be an array or "
2076 "an array section", &e
->where
);
2080 /* Intrinsics are still PROC_UNKNOWN here. However,
2081 since same file external procedures are not resolvable
2082 in gfortran, it is a good deal easier to leave them to
2084 if (ptype
!= PROC_UNKNOWN
2085 && ptype
!= PROC_DUMMY
2086 && ptype
!= PROC_EXTERNAL
2087 && ptype
!= PROC_MODULE
)
2089 gfc_error ("By-value argument at %L is not allowed "
2090 "in this context", &e
->where
);
2095 /* Statement functions have already been excluded above. */
2096 else if (strcmp ("%LOC", arg
->name
) == 0
2097 && e
->ts
.type
== BT_PROCEDURE
)
2099 if (e
->symtree
->n
.sym
->attr
.proc
== PROC_INTERNAL
)
2101 gfc_error ("Passing internal procedure at %L by location "
2102 "not allowed", &e
->where
);
2108 comp
= gfc_get_proc_ptr_comp(e
);
2109 if (e
->expr_type
== EXPR_VARIABLE
2110 && comp
&& comp
->attr
.elemental
)
2112 gfc_error ("ELEMENTAL procedure pointer component %qs is not "
2113 "allowed as an actual argument at %L", comp
->name
,
2117 /* Fortran 2008, C1237. */
2118 if (e
->expr_type
== EXPR_VARIABLE
&& gfc_is_coindexed (e
)
2119 && gfc_has_ultimate_pointer (e
))
2121 gfc_error ("Coindexed actual argument at %L with ultimate pointer "
2122 "component", &e
->where
);
2126 first_actual_arg
= false;
2129 return_value
= true;
2132 actual_arg
= actual_arg_sav
;
2133 first_actual_arg
= first_actual_arg_sav
;
2135 return return_value
;
2139 /* Do the checks of the actual argument list that are specific to elemental
2140 procedures. If called with c == NULL, we have a function, otherwise if
2141 expr == NULL, we have a subroutine. */
2144 resolve_elemental_actual (gfc_expr
*expr
, gfc_code
*c
)
2146 gfc_actual_arglist
*arg0
;
2147 gfc_actual_arglist
*arg
;
2148 gfc_symbol
*esym
= NULL
;
2149 gfc_intrinsic_sym
*isym
= NULL
;
2151 gfc_intrinsic_arg
*iformal
= NULL
;
2152 gfc_formal_arglist
*eformal
= NULL
;
2153 bool formal_optional
= false;
2154 bool set_by_optional
= false;
2158 /* Is this an elemental procedure? */
2159 if (expr
&& expr
->value
.function
.actual
!= NULL
)
2161 if (expr
->value
.function
.esym
!= NULL
2162 && expr
->value
.function
.esym
->attr
.elemental
)
2164 arg0
= expr
->value
.function
.actual
;
2165 esym
= expr
->value
.function
.esym
;
2167 else if (expr
->value
.function
.isym
!= NULL
2168 && expr
->value
.function
.isym
->elemental
)
2170 arg0
= expr
->value
.function
.actual
;
2171 isym
= expr
->value
.function
.isym
;
2176 else if (c
&& c
->ext
.actual
!= NULL
)
2178 arg0
= c
->ext
.actual
;
2180 if (c
->resolved_sym
)
2181 esym
= c
->resolved_sym
;
2183 esym
= c
->symtree
->n
.sym
;
2186 if (!esym
->attr
.elemental
)
2192 /* The rank of an elemental is the rank of its array argument(s). */
2193 for (arg
= arg0
; arg
; arg
= arg
->next
)
2195 if (arg
->expr
!= NULL
&& arg
->expr
->rank
!= 0)
2197 rank
= arg
->expr
->rank
;
2198 if (arg
->expr
->expr_type
== EXPR_VARIABLE
2199 && arg
->expr
->symtree
->n
.sym
->attr
.optional
)
2200 set_by_optional
= true;
2202 /* Function specific; set the result rank and shape. */
2206 if (!expr
->shape
&& arg
->expr
->shape
)
2208 expr
->shape
= gfc_get_shape (rank
);
2209 for (i
= 0; i
< rank
; i
++)
2210 mpz_init_set (expr
->shape
[i
], arg
->expr
->shape
[i
]);
2217 /* If it is an array, it shall not be supplied as an actual argument
2218 to an elemental procedure unless an array of the same rank is supplied
2219 as an actual argument corresponding to a nonoptional dummy argument of
2220 that elemental procedure(12.4.1.5). */
2221 formal_optional
= false;
2223 iformal
= isym
->formal
;
2225 eformal
= esym
->formal
;
2227 for (arg
= arg0
; arg
; arg
= arg
->next
)
2231 if (eformal
->sym
&& eformal
->sym
->attr
.optional
)
2232 formal_optional
= true;
2233 eformal
= eformal
->next
;
2235 else if (isym
&& iformal
)
2237 if (iformal
->optional
)
2238 formal_optional
= true;
2239 iformal
= iformal
->next
;
2242 formal_optional
= true;
2244 if (pedantic
&& arg
->expr
!= NULL
2245 && arg
->expr
->expr_type
== EXPR_VARIABLE
2246 && arg
->expr
->symtree
->n
.sym
->attr
.optional
2249 && (set_by_optional
|| arg
->expr
->rank
!= rank
)
2250 && !(isym
&& isym
->id
== GFC_ISYM_CONVERSION
))
2252 gfc_warning (OPT_Wpedantic
,
2253 "%qs at %L is an array and OPTIONAL; IF IT IS "
2254 "MISSING, it cannot be the actual argument of an "
2255 "ELEMENTAL procedure unless there is a non-optional "
2256 "argument with the same rank (12.4.1.5)",
2257 arg
->expr
->symtree
->n
.sym
->name
, &arg
->expr
->where
);
2261 for (arg
= arg0
; arg
; arg
= arg
->next
)
2263 if (arg
->expr
== NULL
|| arg
->expr
->rank
== 0)
2266 /* Being elemental, the last upper bound of an assumed size array
2267 argument must be present. */
2268 if (resolve_assumed_size_actual (arg
->expr
))
2271 /* Elemental procedure's array actual arguments must conform. */
2274 if (!gfc_check_conformance (arg
->expr
, e
, "elemental procedure"))
2281 /* INTENT(OUT) is only allowed for subroutines; if any actual argument
2282 is an array, the intent inout/out variable needs to be also an array. */
2283 if (rank
> 0 && esym
&& expr
== NULL
)
2284 for (eformal
= esym
->formal
, arg
= arg0
; arg
&& eformal
;
2285 arg
= arg
->next
, eformal
= eformal
->next
)
2286 if ((eformal
->sym
->attr
.intent
== INTENT_OUT
2287 || eformal
->sym
->attr
.intent
== INTENT_INOUT
)
2288 && arg
->expr
&& arg
->expr
->rank
== 0)
2290 gfc_error ("Actual argument at %L for INTENT(%s) dummy %qs of "
2291 "ELEMENTAL subroutine %qs is a scalar, but another "
2292 "actual argument is an array", &arg
->expr
->where
,
2293 (eformal
->sym
->attr
.intent
== INTENT_OUT
) ? "OUT"
2294 : "INOUT", eformal
->sym
->name
, esym
->name
);
2301 /* This function does the checking of references to global procedures
2302 as defined in sections 18.1 and 14.1, respectively, of the Fortran
2303 77 and 95 standards. It checks for a gsymbol for the name, making
2304 one if it does not already exist. If it already exists, then the
2305 reference being resolved must correspond to the type of gsymbol.
2306 Otherwise, the new symbol is equipped with the attributes of the
2307 reference. The corresponding code that is called in creating
2308 global entities is parse.c.
2310 In addition, for all but -std=legacy, the gsymbols are used to
2311 check the interfaces of external procedures from the same file.
2312 The namespace of the gsymbol is resolved and then, once this is
2313 done the interface is checked. */
2317 not_in_recursive (gfc_symbol
*sym
, gfc_namespace
*gsym_ns
)
2319 if (!gsym_ns
->proc_name
->attr
.recursive
)
2322 if (sym
->ns
== gsym_ns
)
2325 if (sym
->ns
->parent
&& sym
->ns
->parent
== gsym_ns
)
2332 not_entry_self_reference (gfc_symbol
*sym
, gfc_namespace
*gsym_ns
)
2334 if (gsym_ns
->entries
)
2336 gfc_entry_list
*entry
= gsym_ns
->entries
;
2338 for (; entry
; entry
= entry
->next
)
2340 if (strcmp (sym
->name
, entry
->sym
->name
) == 0)
2342 if (strcmp (gsym_ns
->proc_name
->name
,
2343 sym
->ns
->proc_name
->name
) == 0)
2347 && strcmp (gsym_ns
->proc_name
->name
,
2348 sym
->ns
->parent
->proc_name
->name
) == 0)
2357 /* Check for the requirement of an explicit interface. F08:12.4.2.2. */
2360 gfc_explicit_interface_required (gfc_symbol
*sym
, char *errmsg
, int err_len
)
2362 gfc_formal_arglist
*arg
= gfc_sym_get_dummy_args (sym
);
2364 for ( ; arg
; arg
= arg
->next
)
2369 if (arg
->sym
->attr
.allocatable
) /* (2a) */
2371 strncpy (errmsg
, _("allocatable argument"), err_len
);
2374 else if (arg
->sym
->attr
.asynchronous
)
2376 strncpy (errmsg
, _("asynchronous argument"), err_len
);
2379 else if (arg
->sym
->attr
.optional
)
2381 strncpy (errmsg
, _("optional argument"), err_len
);
2384 else if (arg
->sym
->attr
.pointer
)
2386 strncpy (errmsg
, _("pointer argument"), err_len
);
2389 else if (arg
->sym
->attr
.target
)
2391 strncpy (errmsg
, _("target argument"), err_len
);
2394 else if (arg
->sym
->attr
.value
)
2396 strncpy (errmsg
, _("value argument"), err_len
);
2399 else if (arg
->sym
->attr
.volatile_
)
2401 strncpy (errmsg
, _("volatile argument"), err_len
);
2404 else if (arg
->sym
->as
&& arg
->sym
->as
->type
== AS_ASSUMED_SHAPE
) /* (2b) */
2406 strncpy (errmsg
, _("assumed-shape argument"), err_len
);
2409 else if (arg
->sym
->as
&& arg
->sym
->as
->type
== AS_ASSUMED_RANK
) /* TS 29113, 6.2. */
2411 strncpy (errmsg
, _("assumed-rank argument"), err_len
);
2414 else if (arg
->sym
->attr
.codimension
) /* (2c) */
2416 strncpy (errmsg
, _("coarray argument"), err_len
);
2419 else if (false) /* (2d) TODO: parametrized derived type */
2421 strncpy (errmsg
, _("parametrized derived type argument"), err_len
);
2424 else if (arg
->sym
->ts
.type
== BT_CLASS
) /* (2e) */
2426 strncpy (errmsg
, _("polymorphic argument"), err_len
);
2429 else if (arg
->sym
->attr
.ext_attr
& (1 << EXT_ATTR_NO_ARG_CHECK
))
2431 strncpy (errmsg
, _("NO_ARG_CHECK attribute"), err_len
);
2434 else if (arg
->sym
->ts
.type
== BT_ASSUMED
)
2436 /* As assumed-type is unlimited polymorphic (cf. above).
2437 See also TS 29113, Note 6.1. */
2438 strncpy (errmsg
, _("assumed-type argument"), err_len
);
2443 if (sym
->attr
.function
)
2445 gfc_symbol
*res
= sym
->result
? sym
->result
: sym
;
2447 if (res
->attr
.dimension
) /* (3a) */
2449 strncpy (errmsg
, _("array result"), err_len
);
2452 else if (res
->attr
.pointer
|| res
->attr
.allocatable
) /* (3b) */
2454 strncpy (errmsg
, _("pointer or allocatable result"), err_len
);
2457 else if (res
->ts
.type
== BT_CHARACTER
&& res
->ts
.u
.cl
2458 && res
->ts
.u
.cl
->length
2459 && res
->ts
.u
.cl
->length
->expr_type
!= EXPR_CONSTANT
) /* (3c) */
2461 strncpy (errmsg
, _("result with non-constant character length"), err_len
);
2466 if (sym
->attr
.elemental
&& !sym
->attr
.intrinsic
) /* (4) */
2468 strncpy (errmsg
, _("elemental procedure"), err_len
);
2471 else if (sym
->attr
.is_bind_c
) /* (5) */
2473 strncpy (errmsg
, _("bind(c) procedure"), err_len
);
2482 resolve_global_procedure (gfc_symbol
*sym
, locus
*where
,
2483 gfc_actual_arglist
**actual
, int sub
)
2487 enum gfc_symbol_type type
;
2490 type
= sub
? GSYM_SUBROUTINE
: GSYM_FUNCTION
;
2492 gsym
= gfc_get_gsymbol (sym
->binding_label
? sym
->binding_label
: sym
->name
);
2494 if ((gsym
->type
!= GSYM_UNKNOWN
&& gsym
->type
!= type
))
2495 gfc_global_used (gsym
, where
);
2497 if ((sym
->attr
.if_source
== IFSRC_UNKNOWN
2498 || sym
->attr
.if_source
== IFSRC_IFBODY
)
2499 && gsym
->type
!= GSYM_UNKNOWN
2500 && !gsym
->binding_label
2502 && gsym
->ns
->resolved
!= -1
2503 && gsym
->ns
->proc_name
2504 && not_in_recursive (sym
, gsym
->ns
)
2505 && not_entry_self_reference (sym
, gsym
->ns
))
2507 gfc_symbol
*def_sym
;
2509 /* Resolve the gsymbol namespace if needed. */
2510 if (!gsym
->ns
->resolved
)
2512 gfc_symbol
*old_dt_list
;
2514 /* Stash away derived types so that the backend_decls do not
2516 old_dt_list
= gfc_derived_types
;
2517 gfc_derived_types
= NULL
;
2519 gfc_resolve (gsym
->ns
);
2521 /* Store the new derived types with the global namespace. */
2522 if (gfc_derived_types
)
2523 gsym
->ns
->derived_types
= gfc_derived_types
;
2525 /* Restore the derived types of this namespace. */
2526 gfc_derived_types
= old_dt_list
;
2529 /* Make sure that translation for the gsymbol occurs before
2530 the procedure currently being resolved. */
2531 ns
= gfc_global_ns_list
;
2532 for (; ns
&& ns
!= gsym
->ns
; ns
= ns
->sibling
)
2534 if (ns
->sibling
== gsym
->ns
)
2536 ns
->sibling
= gsym
->ns
->sibling
;
2537 gsym
->ns
->sibling
= gfc_global_ns_list
;
2538 gfc_global_ns_list
= gsym
->ns
;
2543 def_sym
= gsym
->ns
->proc_name
;
2545 /* This can happen if a binding name has been specified. */
2546 if (gsym
->binding_label
&& gsym
->sym_name
!= def_sym
->name
)
2547 gfc_find_symbol (gsym
->sym_name
, gsym
->ns
, 0, &def_sym
);
2549 if (def_sym
->attr
.entry_master
)
2551 gfc_entry_list
*entry
;
2552 for (entry
= gsym
->ns
->entries
; entry
; entry
= entry
->next
)
2553 if (strcmp (entry
->sym
->name
, sym
->name
) == 0)
2555 def_sym
= entry
->sym
;
2560 if (sym
->attr
.function
&& !gfc_compare_types (&sym
->ts
, &def_sym
->ts
))
2562 gfc_error ("Return type mismatch of function %qs at %L (%s/%s)",
2563 sym
->name
, &sym
->declared_at
, gfc_typename (&sym
->ts
),
2564 gfc_typename (&def_sym
->ts
));
2568 if (sym
->attr
.if_source
== IFSRC_UNKNOWN
2569 && gfc_explicit_interface_required (def_sym
, reason
, sizeof(reason
)))
2571 gfc_error ("Explicit interface required for %qs at %L: %s",
2572 sym
->name
, &sym
->declared_at
, reason
);
2576 if (!pedantic
&& (gfc_option
.allow_std
& GFC_STD_GNU
))
2577 /* Turn erros into warnings with -std=gnu and -std=legacy. */
2578 gfc_errors_to_warnings (true);
2580 if (!gfc_compare_interfaces (sym
, def_sym
, sym
->name
, 0, 1,
2581 reason
, sizeof(reason
), NULL
, NULL
))
2583 gfc_error_opt (OPT_Wargument_mismatch
,
2584 "Interface mismatch in global procedure %qs at %L:"
2585 " %s", sym
->name
, &sym
->declared_at
, reason
);
2590 || ((gfc_option
.warn_std
& GFC_STD_LEGACY
)
2591 && !(gfc_option
.warn_std
& GFC_STD_GNU
)))
2592 gfc_errors_to_warnings (true);
2594 if (sym
->attr
.if_source
!= IFSRC_IFBODY
)
2595 gfc_procedure_use (def_sym
, actual
, where
);
2599 gfc_errors_to_warnings (false);
2601 if (gsym
->type
== GSYM_UNKNOWN
)
2604 gsym
->where
= *where
;
2611 /************* Function resolution *************/
2613 /* Resolve a function call known to be generic.
2614 Section 14.1.2.4.1. */
2617 resolve_generic_f0 (gfc_expr
*expr
, gfc_symbol
*sym
)
2621 if (sym
->attr
.generic
)
2623 s
= gfc_search_interface (sym
->generic
, 0, &expr
->value
.function
.actual
);
2626 expr
->value
.function
.name
= s
->name
;
2627 expr
->value
.function
.esym
= s
;
2629 if (s
->ts
.type
!= BT_UNKNOWN
)
2631 else if (s
->result
!= NULL
&& s
->result
->ts
.type
!= BT_UNKNOWN
)
2632 expr
->ts
= s
->result
->ts
;
2635 expr
->rank
= s
->as
->rank
;
2636 else if (s
->result
!= NULL
&& s
->result
->as
!= NULL
)
2637 expr
->rank
= s
->result
->as
->rank
;
2639 gfc_set_sym_referenced (expr
->value
.function
.esym
);
2644 /* TODO: Need to search for elemental references in generic
2648 if (sym
->attr
.intrinsic
)
2649 return gfc_intrinsic_func_interface (expr
, 0);
2656 resolve_generic_f (gfc_expr
*expr
)
2660 gfc_interface
*intr
= NULL
;
2662 sym
= expr
->symtree
->n
.sym
;
2666 m
= resolve_generic_f0 (expr
, sym
);
2669 else if (m
== MATCH_ERROR
)
2674 for (intr
= sym
->generic
; intr
; intr
= intr
->next
)
2675 if (gfc_fl_struct (intr
->sym
->attr
.flavor
))
2678 if (sym
->ns
->parent
== NULL
)
2680 gfc_find_symbol (sym
->name
, sym
->ns
->parent
, 1, &sym
);
2684 if (!generic_sym (sym
))
2688 /* Last ditch attempt. See if the reference is to an intrinsic
2689 that possesses a matching interface. 14.1.2.4 */
2690 if (sym
&& !intr
&& !gfc_is_intrinsic (sym
, 0, expr
->where
))
2692 if (gfc_init_expr_flag
)
2693 gfc_error ("Function %qs in initialization expression at %L "
2694 "must be an intrinsic function",
2695 expr
->symtree
->n
.sym
->name
, &expr
->where
);
2697 gfc_error ("There is no specific function for the generic %qs "
2698 "at %L", expr
->symtree
->n
.sym
->name
, &expr
->where
);
2704 if (!gfc_convert_to_structure_constructor (expr
, intr
->sym
, NULL
,
2707 if (!gfc_use_derived (expr
->ts
.u
.derived
))
2709 return resolve_structure_cons (expr
, 0);
2712 m
= gfc_intrinsic_func_interface (expr
, 0);
2717 gfc_error ("Generic function %qs at %L is not consistent with a "
2718 "specific intrinsic interface", expr
->symtree
->n
.sym
->name
,
2725 /* Resolve a function call known to be specific. */
2728 resolve_specific_f0 (gfc_symbol
*sym
, gfc_expr
*expr
)
2732 if (sym
->attr
.external
|| sym
->attr
.if_source
== IFSRC_IFBODY
)
2734 if (sym
->attr
.dummy
)
2736 sym
->attr
.proc
= PROC_DUMMY
;
2740 sym
->attr
.proc
= PROC_EXTERNAL
;
2744 if (sym
->attr
.proc
== PROC_MODULE
2745 || sym
->attr
.proc
== PROC_ST_FUNCTION
2746 || sym
->attr
.proc
== PROC_INTERNAL
)
2749 if (sym
->attr
.intrinsic
)
2751 m
= gfc_intrinsic_func_interface (expr
, 1);
2755 gfc_error ("Function %qs at %L is INTRINSIC but is not compatible "
2756 "with an intrinsic", sym
->name
, &expr
->where
);
2764 gfc_procedure_use (sym
, &expr
->value
.function
.actual
, &expr
->where
);
2767 expr
->ts
= sym
->result
->ts
;
2770 expr
->value
.function
.name
= sym
->name
;
2771 expr
->value
.function
.esym
= sym
;
2772 /* Prevent crash when sym->ts.u.derived->components is not set due to previous
2774 if (sym
->ts
.type
== BT_CLASS
&& !CLASS_DATA (sym
))
2776 if (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
)->as
)
2777 expr
->rank
= CLASS_DATA (sym
)->as
->rank
;
2778 else if (sym
->as
!= NULL
)
2779 expr
->rank
= sym
->as
->rank
;
2786 resolve_specific_f (gfc_expr
*expr
)
2791 sym
= expr
->symtree
->n
.sym
;
2795 m
= resolve_specific_f0 (sym
, expr
);
2798 if (m
== MATCH_ERROR
)
2801 if (sym
->ns
->parent
== NULL
)
2804 gfc_find_symbol (sym
->name
, sym
->ns
->parent
, 1, &sym
);
2810 gfc_error ("Unable to resolve the specific function %qs at %L",
2811 expr
->symtree
->n
.sym
->name
, &expr
->where
);
2816 /* Recursively append candidate SYM to CANDIDATES. Store the number of
2817 candidates in CANDIDATES_LEN. */
2820 lookup_function_fuzzy_find_candidates (gfc_symtree
*sym
,
2822 size_t &candidates_len
)
2828 if ((sym
->n
.sym
->ts
.type
!= BT_UNKNOWN
|| sym
->n
.sym
->attr
.external
)
2829 && sym
->n
.sym
->attr
.flavor
== FL_PROCEDURE
)
2830 vec_push (candidates
, candidates_len
, sym
->name
);
2834 lookup_function_fuzzy_find_candidates (p
, candidates
, candidates_len
);
2838 lookup_function_fuzzy_find_candidates (p
, candidates
, candidates_len
);
2842 /* Lookup function FN fuzzily, taking names in SYMROOT into account. */
2845 gfc_lookup_function_fuzzy (const char *fn
, gfc_symtree
*symroot
)
2847 char **candidates
= NULL
;
2848 size_t candidates_len
= 0;
2849 lookup_function_fuzzy_find_candidates (symroot
, candidates
, candidates_len
);
2850 return gfc_closest_fuzzy_match (fn
, candidates
);
2854 /* Resolve a procedure call not known to be generic nor specific. */
2857 resolve_unknown_f (gfc_expr
*expr
)
2862 sym
= expr
->symtree
->n
.sym
;
2864 if (sym
->attr
.dummy
)
2866 sym
->attr
.proc
= PROC_DUMMY
;
2867 expr
->value
.function
.name
= sym
->name
;
2871 /* See if we have an intrinsic function reference. */
2873 if (gfc_is_intrinsic (sym
, 0, expr
->where
))
2875 if (gfc_intrinsic_func_interface (expr
, 1) == MATCH_YES
)
2880 /* The reference is to an external name. */
2882 sym
->attr
.proc
= PROC_EXTERNAL
;
2883 expr
->value
.function
.name
= sym
->name
;
2884 expr
->value
.function
.esym
= expr
->symtree
->n
.sym
;
2886 if (sym
->as
!= NULL
)
2887 expr
->rank
= sym
->as
->rank
;
2889 /* Type of the expression is either the type of the symbol or the
2890 default type of the symbol. */
2893 gfc_procedure_use (sym
, &expr
->value
.function
.actual
, &expr
->where
);
2895 if (sym
->ts
.type
!= BT_UNKNOWN
)
2899 ts
= gfc_get_default_type (sym
->name
, sym
->ns
);
2901 if (ts
->type
== BT_UNKNOWN
)
2904 = gfc_lookup_function_fuzzy (sym
->name
, sym
->ns
->sym_root
);
2906 gfc_error ("Function %qs at %L has no IMPLICIT type"
2907 "; did you mean %qs?",
2908 sym
->name
, &expr
->where
, guessed
);
2910 gfc_error ("Function %qs at %L has no IMPLICIT type",
2911 sym
->name
, &expr
->where
);
2922 /* Return true, if the symbol is an external procedure. */
2924 is_external_proc (gfc_symbol
*sym
)
2926 if (!sym
->attr
.dummy
&& !sym
->attr
.contained
2927 && !gfc_is_intrinsic (sym
, sym
->attr
.subroutine
, sym
->declared_at
)
2928 && sym
->attr
.proc
!= PROC_ST_FUNCTION
2929 && !sym
->attr
.proc_pointer
2930 && !sym
->attr
.use_assoc
2938 /* Figure out if a function reference is pure or not. Also set the name
2939 of the function for a potential error message. Return nonzero if the
2940 function is PURE, zero if not. */
2942 pure_stmt_function (gfc_expr
*, gfc_symbol
*);
2945 gfc_pure_function (gfc_expr
*e
, const char **name
)
2948 gfc_component
*comp
;
2952 if (e
->symtree
!= NULL
2953 && e
->symtree
->n
.sym
!= NULL
2954 && e
->symtree
->n
.sym
->attr
.proc
== PROC_ST_FUNCTION
)
2955 return pure_stmt_function (e
, e
->symtree
->n
.sym
);
2957 comp
= gfc_get_proc_ptr_comp (e
);
2960 pure
= gfc_pure (comp
->ts
.interface
);
2963 else if (e
->value
.function
.esym
)
2965 pure
= gfc_pure (e
->value
.function
.esym
);
2966 *name
= e
->value
.function
.esym
->name
;
2968 else if (e
->value
.function
.isym
)
2970 pure
= e
->value
.function
.isym
->pure
2971 || e
->value
.function
.isym
->elemental
;
2972 *name
= e
->value
.function
.isym
->name
;
2976 /* Implicit functions are not pure. */
2978 *name
= e
->value
.function
.name
;
2985 /* Check if the expression is a reference to an implicitly pure function. */
2988 gfc_implicit_pure_function (gfc_expr
*e
)
2990 gfc_component
*comp
= gfc_get_proc_ptr_comp (e
);
2992 return gfc_implicit_pure (comp
->ts
.interface
);
2993 else if (e
->value
.function
.esym
)
2994 return gfc_implicit_pure (e
->value
.function
.esym
);
3001 impure_stmt_fcn (gfc_expr
*e
, gfc_symbol
*sym
,
3002 int *f ATTRIBUTE_UNUSED
)
3006 /* Don't bother recursing into other statement functions
3007 since they will be checked individually for purity. */
3008 if (e
->expr_type
!= EXPR_FUNCTION
3010 || e
->symtree
->n
.sym
== sym
3011 || e
->symtree
->n
.sym
->attr
.proc
== PROC_ST_FUNCTION
)
3014 return gfc_pure_function (e
, &name
) ? false : true;
3019 pure_stmt_function (gfc_expr
*e
, gfc_symbol
*sym
)
3021 return gfc_traverse_expr (e
, sym
, impure_stmt_fcn
, 0) ? 0 : 1;
3025 /* Check if an impure function is allowed in the current context. */
3027 static bool check_pure_function (gfc_expr
*e
)
3029 const char *name
= NULL
;
3030 if (!gfc_pure_function (e
, &name
) && name
)
3034 gfc_error ("Reference to impure function %qs at %L inside a "
3035 "FORALL %s", name
, &e
->where
,
3036 forall_flag
== 2 ? "mask" : "block");
3039 else if (gfc_do_concurrent_flag
)
3041 gfc_error ("Reference to impure function %qs at %L inside a "
3042 "DO CONCURRENT %s", name
, &e
->where
,
3043 gfc_do_concurrent_flag
== 2 ? "mask" : "block");
3046 else if (gfc_pure (NULL
))
3048 gfc_error ("Reference to impure function %qs at %L "
3049 "within a PURE procedure", name
, &e
->where
);
3052 if (!gfc_implicit_pure_function (e
))
3053 gfc_unset_implicit_pure (NULL
);
3059 /* Update current procedure's array_outer_dependency flag, considering
3060 a call to procedure SYM. */
3063 update_current_proc_array_outer_dependency (gfc_symbol
*sym
)
3065 /* Check to see if this is a sibling function that has not yet
3067 gfc_namespace
*sibling
= gfc_current_ns
->sibling
;
3068 for (; sibling
; sibling
= sibling
->sibling
)
3070 if (sibling
->proc_name
== sym
)
3072 gfc_resolve (sibling
);
3077 /* If SYM has references to outer arrays, so has the procedure calling
3078 SYM. If SYM is a procedure pointer, we can assume the worst. */
3079 if ((sym
->attr
.array_outer_dependency
|| sym
->attr
.proc_pointer
)
3080 && gfc_current_ns
->proc_name
)
3081 gfc_current_ns
->proc_name
->attr
.array_outer_dependency
= 1;
3085 /* Resolve a function call, which means resolving the arguments, then figuring
3086 out which entity the name refers to. */
3089 resolve_function (gfc_expr
*expr
)
3091 gfc_actual_arglist
*arg
;
3095 procedure_type p
= PROC_INTRINSIC
;
3096 bool no_formal_args
;
3100 sym
= expr
->symtree
->n
.sym
;
3102 /* If this is a procedure pointer component, it has already been resolved. */
3103 if (gfc_is_proc_ptr_comp (expr
))
3106 /* Avoid re-resolving the arguments of caf_get, which can lead to inserting
3108 if (sym
&& sym
->attr
.intrinsic
3109 && (sym
->intmod_sym_id
== GFC_ISYM_CAF_GET
3110 || sym
->intmod_sym_id
== GFC_ISYM_CAF_SEND
))
3113 if (sym
&& sym
->attr
.intrinsic
3114 && !gfc_resolve_intrinsic (sym
, &expr
->where
))
3117 if (sym
&& (sym
->attr
.flavor
== FL_VARIABLE
|| sym
->attr
.subroutine
))
3119 gfc_error ("%qs at %L is not a function", sym
->name
, &expr
->where
);
3123 /* If this is a deferred TBP with an abstract interface (which may
3124 of course be referenced), expr->value.function.esym will be set. */
3125 if (sym
&& sym
->attr
.abstract
&& !expr
->value
.function
.esym
)
3127 gfc_error ("ABSTRACT INTERFACE %qs must not be referenced at %L",
3128 sym
->name
, &expr
->where
);
3132 /* If this is a deferred TBP with an abstract interface, its result
3133 cannot be an assumed length character (F2003: C418). */
3134 if (sym
&& sym
->attr
.abstract
&& sym
->attr
.function
3135 && sym
->result
->ts
.u
.cl
3136 && sym
->result
->ts
.u
.cl
->length
== NULL
3137 && !sym
->result
->ts
.deferred
)
3139 gfc_error ("ABSTRACT INTERFACE %qs at %L must not have an assumed "
3140 "character length result (F2008: C418)", sym
->name
,
3145 /* Switch off assumed size checking and do this again for certain kinds
3146 of procedure, once the procedure itself is resolved. */
3147 need_full_assumed_size
++;
3149 if (expr
->symtree
&& expr
->symtree
->n
.sym
)
3150 p
= expr
->symtree
->n
.sym
->attr
.proc
;
3152 if (expr
->value
.function
.isym
&& expr
->value
.function
.isym
->inquiry
)
3153 inquiry_argument
= true;
3154 no_formal_args
= sym
&& is_external_proc (sym
)
3155 && gfc_sym_get_dummy_args (sym
) == NULL
;
3157 if (!resolve_actual_arglist (expr
->value
.function
.actual
,
3160 inquiry_argument
= false;
3164 inquiry_argument
= false;
3166 /* Resume assumed_size checking. */
3167 need_full_assumed_size
--;
3169 /* If the procedure is external, check for usage. */
3170 if (sym
&& is_external_proc (sym
))
3171 resolve_global_procedure (sym
, &expr
->where
,
3172 &expr
->value
.function
.actual
, 0);
3174 if (sym
&& sym
->ts
.type
== BT_CHARACTER
3176 && sym
->ts
.u
.cl
->length
== NULL
3178 && !sym
->ts
.deferred
3179 && expr
->value
.function
.esym
== NULL
3180 && !sym
->attr
.contained
)
3182 /* Internal procedures are taken care of in resolve_contained_fntype. */
3183 gfc_error ("Function %qs is declared CHARACTER(*) and cannot "
3184 "be used at %L since it is not a dummy argument",
3185 sym
->name
, &expr
->where
);
3189 /* See if function is already resolved. */
3191 if (expr
->value
.function
.name
!= NULL
3192 || expr
->value
.function
.isym
!= NULL
)
3194 if (expr
->ts
.type
== BT_UNKNOWN
)
3200 /* Apply the rules of section 14.1.2. */
3202 switch (procedure_kind (sym
))
3205 t
= resolve_generic_f (expr
);
3208 case PTYPE_SPECIFIC
:
3209 t
= resolve_specific_f (expr
);
3213 t
= resolve_unknown_f (expr
);
3217 gfc_internal_error ("resolve_function(): bad function type");
3221 /* If the expression is still a function (it might have simplified),
3222 then we check to see if we are calling an elemental function. */
3224 if (expr
->expr_type
!= EXPR_FUNCTION
)
3227 temp
= need_full_assumed_size
;
3228 need_full_assumed_size
= 0;
3230 if (!resolve_elemental_actual (expr
, NULL
))
3233 if (omp_workshare_flag
3234 && expr
->value
.function
.esym
3235 && ! gfc_elemental (expr
->value
.function
.esym
))
3237 gfc_error ("User defined non-ELEMENTAL function %qs at %L not allowed "
3238 "in WORKSHARE construct", expr
->value
.function
.esym
->name
,
3243 #define GENERIC_ID expr->value.function.isym->id
3244 else if (expr
->value
.function
.actual
!= NULL
3245 && expr
->value
.function
.isym
!= NULL
3246 && GENERIC_ID
!= GFC_ISYM_LBOUND
3247 && GENERIC_ID
!= GFC_ISYM_LCOBOUND
3248 && GENERIC_ID
!= GFC_ISYM_UCOBOUND
3249 && GENERIC_ID
!= GFC_ISYM_LEN
3250 && GENERIC_ID
!= GFC_ISYM_LOC
3251 && GENERIC_ID
!= GFC_ISYM_C_LOC
3252 && GENERIC_ID
!= GFC_ISYM_PRESENT
)
3254 /* Array intrinsics must also have the last upper bound of an
3255 assumed size array argument. UBOUND and SIZE have to be
3256 excluded from the check if the second argument is anything
3259 for (arg
= expr
->value
.function
.actual
; arg
; arg
= arg
->next
)
3261 if ((GENERIC_ID
== GFC_ISYM_UBOUND
|| GENERIC_ID
== GFC_ISYM_SIZE
)
3262 && arg
== expr
->value
.function
.actual
3263 && arg
->next
!= NULL
&& arg
->next
->expr
)
3265 if (arg
->next
->expr
->expr_type
!= EXPR_CONSTANT
)
3268 if (arg
->next
->name
&& strcmp (arg
->next
->name
, "kind") == 0)
3271 if ((int)mpz_get_si (arg
->next
->expr
->value
.integer
)
3276 if (arg
->expr
!= NULL
3277 && arg
->expr
->rank
> 0
3278 && resolve_assumed_size_actual (arg
->expr
))
3284 need_full_assumed_size
= temp
;
3286 if (!check_pure_function(expr
))
3289 /* Functions without the RECURSIVE attribution are not allowed to
3290 * call themselves. */
3291 if (expr
->value
.function
.esym
&& !expr
->value
.function
.esym
->attr
.recursive
)
3294 esym
= expr
->value
.function
.esym
;
3296 if (is_illegal_recursion (esym
, gfc_current_ns
))
3298 if (esym
->attr
.entry
&& esym
->ns
->entries
)
3299 gfc_error ("ENTRY %qs at %L cannot be called recursively, as"
3300 " function %qs is not RECURSIVE",
3301 esym
->name
, &expr
->where
, esym
->ns
->entries
->sym
->name
);
3303 gfc_error ("Function %qs at %L cannot be called recursively, as it"
3304 " is not RECURSIVE", esym
->name
, &expr
->where
);
3310 /* Character lengths of use associated functions may contains references to
3311 symbols not referenced from the current program unit otherwise. Make sure
3312 those symbols are marked as referenced. */
3314 if (expr
->ts
.type
== BT_CHARACTER
&& expr
->value
.function
.esym
3315 && expr
->value
.function
.esym
->attr
.use_assoc
)
3317 gfc_expr_set_symbols_referenced (expr
->ts
.u
.cl
->length
);
3320 /* Make sure that the expression has a typespec that works. */
3321 if (expr
->ts
.type
== BT_UNKNOWN
)
3323 if (expr
->symtree
->n
.sym
->result
3324 && expr
->symtree
->n
.sym
->result
->ts
.type
!= BT_UNKNOWN
3325 && !expr
->symtree
->n
.sym
->result
->attr
.proc_pointer
)
3326 expr
->ts
= expr
->symtree
->n
.sym
->result
->ts
;
3329 if (!expr
->ref
&& !expr
->value
.function
.isym
)
3331 if (expr
->value
.function
.esym
)
3332 update_current_proc_array_outer_dependency (expr
->value
.function
.esym
);
3334 update_current_proc_array_outer_dependency (sym
);
3337 /* typebound procedure: Assume the worst. */
3338 gfc_current_ns
->proc_name
->attr
.array_outer_dependency
= 1;
3344 /************* Subroutine resolution *************/
3347 pure_subroutine (gfc_symbol
*sym
, const char *name
, locus
*loc
)
3354 gfc_error ("Subroutine call to %qs in FORALL block at %L is not PURE",
3358 else if (gfc_do_concurrent_flag
)
3360 gfc_error ("Subroutine call to %qs in DO CONCURRENT block at %L is not "
3364 else if (gfc_pure (NULL
))
3366 gfc_error ("Subroutine call to %qs at %L is not PURE", name
, loc
);
3370 gfc_unset_implicit_pure (NULL
);
3376 resolve_generic_s0 (gfc_code
*c
, gfc_symbol
*sym
)
3380 if (sym
->attr
.generic
)
3382 s
= gfc_search_interface (sym
->generic
, 1, &c
->ext
.actual
);
3385 c
->resolved_sym
= s
;
3386 if (!pure_subroutine (s
, s
->name
, &c
->loc
))
3391 /* TODO: Need to search for elemental references in generic interface. */
3394 if (sym
->attr
.intrinsic
)
3395 return gfc_intrinsic_sub_interface (c
, 0);
3402 resolve_generic_s (gfc_code
*c
)
3407 sym
= c
->symtree
->n
.sym
;
3411 m
= resolve_generic_s0 (c
, sym
);
3414 else if (m
== MATCH_ERROR
)
3418 if (sym
->ns
->parent
== NULL
)
3420 gfc_find_symbol (sym
->name
, sym
->ns
->parent
, 1, &sym
);
3424 if (!generic_sym (sym
))
3428 /* Last ditch attempt. See if the reference is to an intrinsic
3429 that possesses a matching interface. 14.1.2.4 */
3430 sym
= c
->symtree
->n
.sym
;
3432 if (!gfc_is_intrinsic (sym
, 1, c
->loc
))
3434 gfc_error ("There is no specific subroutine for the generic %qs at %L",
3435 sym
->name
, &c
->loc
);
3439 m
= gfc_intrinsic_sub_interface (c
, 0);
3443 gfc_error ("Generic subroutine %qs at %L is not consistent with an "
3444 "intrinsic subroutine interface", sym
->name
, &c
->loc
);
3450 /* Resolve a subroutine call known to be specific. */
3453 resolve_specific_s0 (gfc_code
*c
, gfc_symbol
*sym
)
3457 if (sym
->attr
.external
|| sym
->attr
.if_source
== IFSRC_IFBODY
)
3459 if (sym
->attr
.dummy
)
3461 sym
->attr
.proc
= PROC_DUMMY
;
3465 sym
->attr
.proc
= PROC_EXTERNAL
;
3469 if (sym
->attr
.proc
== PROC_MODULE
|| sym
->attr
.proc
== PROC_INTERNAL
)
3472 if (sym
->attr
.intrinsic
)
3474 m
= gfc_intrinsic_sub_interface (c
, 1);
3478 gfc_error ("Subroutine %qs at %L is INTRINSIC but is not compatible "
3479 "with an intrinsic", sym
->name
, &c
->loc
);
3487 gfc_procedure_use (sym
, &c
->ext
.actual
, &c
->loc
);
3489 c
->resolved_sym
= sym
;
3490 if (!pure_subroutine (sym
, sym
->name
, &c
->loc
))
3498 resolve_specific_s (gfc_code
*c
)
3503 sym
= c
->symtree
->n
.sym
;
3507 m
= resolve_specific_s0 (c
, sym
);
3510 if (m
== MATCH_ERROR
)
3513 if (sym
->ns
->parent
== NULL
)
3516 gfc_find_symbol (sym
->name
, sym
->ns
->parent
, 1, &sym
);
3522 sym
= c
->symtree
->n
.sym
;
3523 gfc_error ("Unable to resolve the specific subroutine %qs at %L",
3524 sym
->name
, &c
->loc
);
3530 /* Resolve a subroutine call not known to be generic nor specific. */
3533 resolve_unknown_s (gfc_code
*c
)
3537 sym
= c
->symtree
->n
.sym
;
3539 if (sym
->attr
.dummy
)
3541 sym
->attr
.proc
= PROC_DUMMY
;
3545 /* See if we have an intrinsic function reference. */
3547 if (gfc_is_intrinsic (sym
, 1, c
->loc
))
3549 if (gfc_intrinsic_sub_interface (c
, 1) == MATCH_YES
)
3554 /* The reference is to an external name. */
3557 gfc_procedure_use (sym
, &c
->ext
.actual
, &c
->loc
);
3559 c
->resolved_sym
= sym
;
3561 return pure_subroutine (sym
, sym
->name
, &c
->loc
);
3565 /* Resolve a subroutine call. Although it was tempting to use the same code
3566 for functions, subroutines and functions are stored differently and this
3567 makes things awkward. */
3570 resolve_call (gfc_code
*c
)
3573 procedure_type ptype
= PROC_INTRINSIC
;
3574 gfc_symbol
*csym
, *sym
;
3575 bool no_formal_args
;
3577 csym
= c
->symtree
? c
->symtree
->n
.sym
: NULL
;
3579 if (csym
&& csym
->ts
.type
!= BT_UNKNOWN
)
3581 gfc_error ("%qs at %L has a type, which is not consistent with "
3582 "the CALL at %L", csym
->name
, &csym
->declared_at
, &c
->loc
);
3586 if (csym
&& gfc_current_ns
->parent
&& csym
->ns
!= gfc_current_ns
)
3589 gfc_find_sym_tree (c
->symtree
->name
, gfc_current_ns
, 1, &st
);
3590 sym
= st
? st
->n
.sym
: NULL
;
3591 if (sym
&& csym
!= sym
3592 && sym
->ns
== gfc_current_ns
3593 && sym
->attr
.flavor
== FL_PROCEDURE
3594 && sym
->attr
.contained
)
3597 if (csym
->attr
.generic
)
3598 c
->symtree
->n
.sym
= sym
;
3601 csym
= c
->symtree
->n
.sym
;
3605 /* If this ia a deferred TBP, c->expr1 will be set. */
3606 if (!c
->expr1
&& csym
)
3608 if (csym
->attr
.abstract
)
3610 gfc_error ("ABSTRACT INTERFACE %qs must not be referenced at %L",
3611 csym
->name
, &c
->loc
);
3615 /* Subroutines without the RECURSIVE attribution are not allowed to
3617 if (is_illegal_recursion (csym
, gfc_current_ns
))
3619 if (csym
->attr
.entry
&& csym
->ns
->entries
)
3620 gfc_error ("ENTRY %qs at %L cannot be called recursively, "
3621 "as subroutine %qs is not RECURSIVE",
3622 csym
->name
, &c
->loc
, csym
->ns
->entries
->sym
->name
);
3624 gfc_error ("SUBROUTINE %qs at %L cannot be called recursively, "
3625 "as it is not RECURSIVE", csym
->name
, &c
->loc
);
3631 /* Switch off assumed size checking and do this again for certain kinds
3632 of procedure, once the procedure itself is resolved. */
3633 need_full_assumed_size
++;
3636 ptype
= csym
->attr
.proc
;
3638 no_formal_args
= csym
&& is_external_proc (csym
)
3639 && gfc_sym_get_dummy_args (csym
) == NULL
;
3640 if (!resolve_actual_arglist (c
->ext
.actual
, ptype
, no_formal_args
))
3643 /* Resume assumed_size checking. */
3644 need_full_assumed_size
--;
3646 /* If external, check for usage. */
3647 if (csym
&& is_external_proc (csym
))
3648 resolve_global_procedure (csym
, &c
->loc
, &c
->ext
.actual
, 1);
3651 if (c
->resolved_sym
== NULL
)
3653 c
->resolved_isym
= NULL
;
3654 switch (procedure_kind (csym
))
3657 t
= resolve_generic_s (c
);
3660 case PTYPE_SPECIFIC
:
3661 t
= resolve_specific_s (c
);
3665 t
= resolve_unknown_s (c
);
3669 gfc_internal_error ("resolve_subroutine(): bad function type");
3673 /* Some checks of elemental subroutine actual arguments. */
3674 if (!resolve_elemental_actual (NULL
, c
))
3678 update_current_proc_array_outer_dependency (csym
);
3680 /* Typebound procedure: Assume the worst. */
3681 gfc_current_ns
->proc_name
->attr
.array_outer_dependency
= 1;
3687 /* Compare the shapes of two arrays that have non-NULL shapes. If both
3688 op1->shape and op2->shape are non-NULL return true if their shapes
3689 match. If both op1->shape and op2->shape are non-NULL return false
3690 if their shapes do not match. If either op1->shape or op2->shape is
3691 NULL, return true. */
3694 compare_shapes (gfc_expr
*op1
, gfc_expr
*op2
)
3701 if (op1
->shape
!= NULL
&& op2
->shape
!= NULL
)
3703 for (i
= 0; i
< op1
->rank
; i
++)
3705 if (mpz_cmp (op1
->shape
[i
], op2
->shape
[i
]) != 0)
3707 gfc_error ("Shapes for operands at %L and %L are not conformable",
3708 &op1
->where
, &op2
->where
);
3718 /* Convert a logical operator to the corresponding bitwise intrinsic call.
3719 For example A .AND. B becomes IAND(A, B). */
3721 logical_to_bitwise (gfc_expr
*e
)
3723 gfc_expr
*tmp
, *op1
, *op2
;
3725 gfc_actual_arglist
*args
= NULL
;
3727 gcc_assert (e
->expr_type
== EXPR_OP
);
3729 isym
= GFC_ISYM_NONE
;
3730 op1
= e
->value
.op
.op1
;
3731 op2
= e
->value
.op
.op2
;
3733 switch (e
->value
.op
.op
)
3736 isym
= GFC_ISYM_NOT
;
3739 isym
= GFC_ISYM_IAND
;
3742 isym
= GFC_ISYM_IOR
;
3744 case INTRINSIC_NEQV
:
3745 isym
= GFC_ISYM_IEOR
;
3748 /* "Bitwise eqv" is just the complement of NEQV === IEOR.
3749 Change the old expression to NEQV, which will get replaced by IEOR,
3750 and wrap it in NOT. */
3751 tmp
= gfc_copy_expr (e
);
3752 tmp
->value
.op
.op
= INTRINSIC_NEQV
;
3753 tmp
= logical_to_bitwise (tmp
);
3754 isym
= GFC_ISYM_NOT
;
3759 gfc_internal_error ("logical_to_bitwise(): Bad intrinsic");
3762 /* Inherit the original operation's operands as arguments. */
3763 args
= gfc_get_actual_arglist ();
3767 args
->next
= gfc_get_actual_arglist ();
3768 args
->next
->expr
= op2
;
3771 /* Convert the expression to a function call. */
3772 e
->expr_type
= EXPR_FUNCTION
;
3773 e
->value
.function
.actual
= args
;
3774 e
->value
.function
.isym
= gfc_intrinsic_function_by_id (isym
);
3775 e
->value
.function
.name
= e
->value
.function
.isym
->name
;
3776 e
->value
.function
.esym
= NULL
;
3778 /* Make up a pre-resolved function call symtree if we need to. */
3779 if (!e
->symtree
|| !e
->symtree
->n
.sym
)
3782 gfc_get_ha_sym_tree (e
->value
.function
.isym
->name
, &e
->symtree
);
3783 sym
= e
->symtree
->n
.sym
;
3785 sym
->attr
.flavor
= FL_PROCEDURE
;
3786 sym
->attr
.function
= 1;
3787 sym
->attr
.elemental
= 1;
3789 sym
->attr
.referenced
= 1;
3790 gfc_intrinsic_symbol (sym
);
3791 gfc_commit_symbol (sym
);
3794 args
->name
= e
->value
.function
.isym
->formal
->name
;
3795 if (e
->value
.function
.isym
->formal
->next
)
3796 args
->next
->name
= e
->value
.function
.isym
->formal
->next
->name
;
3801 /* Recursively append candidate UOP to CANDIDATES. Store the number of
3802 candidates in CANDIDATES_LEN. */
3804 lookup_uop_fuzzy_find_candidates (gfc_symtree
*uop
,
3806 size_t &candidates_len
)
3813 /* Not sure how to properly filter here. Use all for a start.
3814 n.uop.op is NULL for empty interface operators (is that legal?) disregard
3815 these as i suppose they don't make terribly sense. */
3817 if (uop
->n
.uop
->op
!= NULL
)
3818 vec_push (candidates
, candidates_len
, uop
->name
);
3822 lookup_uop_fuzzy_find_candidates (p
, candidates
, candidates_len
);
3826 lookup_uop_fuzzy_find_candidates (p
, candidates
, candidates_len
);
3829 /* Lookup user-operator OP fuzzily, taking names in UOP into account. */
3832 lookup_uop_fuzzy (const char *op
, gfc_symtree
*uop
)
3834 char **candidates
= NULL
;
3835 size_t candidates_len
= 0;
3836 lookup_uop_fuzzy_find_candidates (uop
, candidates
, candidates_len
);
3837 return gfc_closest_fuzzy_match (op
, candidates
);
3841 /* Callback finding an impure function as an operand to an .and. or
3842 .or. expression. Remember the last function warned about to
3843 avoid double warnings when recursing. */
3846 impure_function_callback (gfc_expr
**e
, int *walk_subtrees ATTRIBUTE_UNUSED
,
3851 static gfc_expr
*last
= NULL
;
3852 bool *found
= (bool *) data
;
3854 if (f
->expr_type
== EXPR_FUNCTION
)
3857 if (f
!= last
&& !gfc_pure_function (f
, &name
)
3858 && !gfc_implicit_pure_function (f
))
3861 gfc_warning (OPT_Wfunction_elimination
,
3862 "Impure function %qs at %L might not be evaluated",
3865 gfc_warning (OPT_Wfunction_elimination
,
3866 "Impure function at %L might not be evaluated",
3876 /* Resolve an operator expression node. This can involve replacing the
3877 operation with a user defined function call. */
3880 resolve_operator (gfc_expr
*e
)
3882 gfc_expr
*op1
, *op2
;
3884 bool dual_locus_error
;
3887 /* Resolve all subnodes-- give them types. */
3889 switch (e
->value
.op
.op
)
3892 if (!gfc_resolve_expr (e
->value
.op
.op2
))
3898 case INTRINSIC_UPLUS
:
3899 case INTRINSIC_UMINUS
:
3900 case INTRINSIC_PARENTHESES
:
3901 if (!gfc_resolve_expr (e
->value
.op
.op1
))
3906 /* Typecheck the new node. */
3908 op1
= e
->value
.op
.op1
;
3909 op2
= e
->value
.op
.op2
;
3910 dual_locus_error
= false;
3912 if ((op1
&& op1
->expr_type
== EXPR_NULL
)
3913 || (op2
&& op2
->expr_type
== EXPR_NULL
))
3915 sprintf (msg
, _("Invalid context for NULL() pointer at %%L"));
3919 switch (e
->value
.op
.op
)
3921 case INTRINSIC_UPLUS
:
3922 case INTRINSIC_UMINUS
:
3923 if (op1
->ts
.type
== BT_INTEGER
3924 || op1
->ts
.type
== BT_REAL
3925 || op1
->ts
.type
== BT_COMPLEX
)
3931 sprintf (msg
, _("Operand of unary numeric operator %%<%s%%> at %%L is %s"),
3932 gfc_op2string (e
->value
.op
.op
), gfc_typename (&e
->ts
));
3935 case INTRINSIC_PLUS
:
3936 case INTRINSIC_MINUS
:
3937 case INTRINSIC_TIMES
:
3938 case INTRINSIC_DIVIDE
:
3939 case INTRINSIC_POWER
:
3940 if (gfc_numeric_ts (&op1
->ts
) && gfc_numeric_ts (&op2
->ts
))
3942 gfc_type_convert_binary (e
, 1);
3946 if (op1
->ts
.type
== BT_DERIVED
|| op2
->ts
.type
== BT_DERIVED
)
3948 _("Unexpected derived-type entities in binary intrinsic "
3949 "numeric operator %%<%s%%> at %%L"),
3950 gfc_op2string (e
->value
.op
.op
));
3953 _("Operands of binary numeric operator %%<%s%%> at %%L are %s/%s"),
3954 gfc_op2string (e
->value
.op
.op
), gfc_typename (&op1
->ts
),
3955 gfc_typename (&op2
->ts
));
3958 case INTRINSIC_CONCAT
:
3959 if (op1
->ts
.type
== BT_CHARACTER
&& op2
->ts
.type
== BT_CHARACTER
3960 && op1
->ts
.kind
== op2
->ts
.kind
)
3962 e
->ts
.type
= BT_CHARACTER
;
3963 e
->ts
.kind
= op1
->ts
.kind
;
3968 _("Operands of string concatenation operator at %%L are %s/%s"),
3969 gfc_typename (&op1
->ts
), gfc_typename (&op2
->ts
));
3975 case INTRINSIC_NEQV
:
3976 if (op1
->ts
.type
== BT_LOGICAL
&& op2
->ts
.type
== BT_LOGICAL
)
3978 e
->ts
.type
= BT_LOGICAL
;
3979 e
->ts
.kind
= gfc_kind_max (op1
, op2
);
3980 if (op1
->ts
.kind
< e
->ts
.kind
)
3981 gfc_convert_type (op1
, &e
->ts
, 2);
3982 else if (op2
->ts
.kind
< e
->ts
.kind
)
3983 gfc_convert_type (op2
, &e
->ts
, 2);
3985 if (flag_frontend_optimize
&&
3986 (e
->value
.op
.op
== INTRINSIC_AND
|| e
->value
.op
.op
== INTRINSIC_OR
))
3988 /* Warn about short-circuiting
3989 with impure function as second operand. */
3991 gfc_expr_walker (&op2
, impure_function_callback
, &op2_f
);
3996 /* Logical ops on integers become bitwise ops with -fdec. */
3998 && (op1
->ts
.type
== BT_INTEGER
|| op2
->ts
.type
== BT_INTEGER
))
4000 e
->ts
.type
= BT_INTEGER
;
4001 e
->ts
.kind
= gfc_kind_max (op1
, op2
);
4002 if (op1
->ts
.type
!= e
->ts
.type
|| op1
->ts
.kind
!= e
->ts
.kind
)
4003 gfc_convert_type (op1
, &e
->ts
, 1);
4004 if (op2
->ts
.type
!= e
->ts
.type
|| op2
->ts
.kind
!= e
->ts
.kind
)
4005 gfc_convert_type (op2
, &e
->ts
, 1);
4006 e
= logical_to_bitwise (e
);
4007 return resolve_function (e
);
4010 sprintf (msg
, _("Operands of logical operator %%<%s%%> at %%L are %s/%s"),
4011 gfc_op2string (e
->value
.op
.op
), gfc_typename (&op1
->ts
),
4012 gfc_typename (&op2
->ts
));
4017 /* Logical ops on integers become bitwise ops with -fdec. */
4018 if (flag_dec
&& op1
->ts
.type
== BT_INTEGER
)
4020 e
->ts
.type
= BT_INTEGER
;
4021 e
->ts
.kind
= op1
->ts
.kind
;
4022 e
= logical_to_bitwise (e
);
4023 return resolve_function (e
);
4026 if (op1
->ts
.type
== BT_LOGICAL
)
4028 e
->ts
.type
= BT_LOGICAL
;
4029 e
->ts
.kind
= op1
->ts
.kind
;
4033 sprintf (msg
, _("Operand of .not. operator at %%L is %s"),
4034 gfc_typename (&op1
->ts
));
4038 case INTRINSIC_GT_OS
:
4040 case INTRINSIC_GE_OS
:
4042 case INTRINSIC_LT_OS
:
4044 case INTRINSIC_LE_OS
:
4045 if (op1
->ts
.type
== BT_COMPLEX
|| op2
->ts
.type
== BT_COMPLEX
)
4047 strcpy (msg
, _("COMPLEX quantities cannot be compared at %L"));
4054 case INTRINSIC_EQ_OS
:
4056 case INTRINSIC_NE_OS
:
4057 if (op1
->ts
.type
== BT_CHARACTER
&& op2
->ts
.type
== BT_CHARACTER
4058 && op1
->ts
.kind
== op2
->ts
.kind
)
4060 e
->ts
.type
= BT_LOGICAL
;
4061 e
->ts
.kind
= gfc_default_logical_kind
;
4065 if (gfc_numeric_ts (&op1
->ts
) && gfc_numeric_ts (&op2
->ts
))
4067 gfc_type_convert_binary (e
, 1);
4069 e
->ts
.type
= BT_LOGICAL
;
4070 e
->ts
.kind
= gfc_default_logical_kind
;
4072 if (warn_compare_reals
)
4074 gfc_intrinsic_op op
= e
->value
.op
.op
;
4076 /* Type conversion has made sure that the types of op1 and op2
4077 agree, so it is only necessary to check the first one. */
4078 if ((op1
->ts
.type
== BT_REAL
|| op1
->ts
.type
== BT_COMPLEX
)
4079 && (op
== INTRINSIC_EQ
|| op
== INTRINSIC_EQ_OS
4080 || op
== INTRINSIC_NE
|| op
== INTRINSIC_NE_OS
))
4084 if (op
== INTRINSIC_EQ
|| op
== INTRINSIC_EQ_OS
)
4085 msg
= "Equality comparison for %s at %L";
4087 msg
= "Inequality comparison for %s at %L";
4089 gfc_warning (OPT_Wcompare_reals
, msg
,
4090 gfc_typename (&op1
->ts
), &op1
->where
);
4097 if (op1
->ts
.type
== BT_LOGICAL
&& op2
->ts
.type
== BT_LOGICAL
)
4099 _("Logicals at %%L must be compared with %s instead of %s"),
4100 (e
->value
.op
.op
== INTRINSIC_EQ
4101 || e
->value
.op
.op
== INTRINSIC_EQ_OS
)
4102 ? ".eqv." : ".neqv.", gfc_op2string (e
->value
.op
.op
));
4105 _("Operands of comparison operator %%<%s%%> at %%L are %s/%s"),
4106 gfc_op2string (e
->value
.op
.op
), gfc_typename (&op1
->ts
),
4107 gfc_typename (&op2
->ts
));
4111 case INTRINSIC_USER
:
4112 if (e
->value
.op
.uop
->op
== NULL
)
4114 const char *name
= e
->value
.op
.uop
->name
;
4115 const char *guessed
;
4116 guessed
= lookup_uop_fuzzy (name
, e
->value
.op
.uop
->ns
->uop_root
);
4118 sprintf (msg
, _("Unknown operator %%<%s%%> at %%L; did you mean '%s'?"),
4121 sprintf (msg
, _("Unknown operator %%<%s%%> at %%L"), name
);
4123 else if (op2
== NULL
)
4124 sprintf (msg
, _("Operand of user operator %%<%s%%> at %%L is %s"),
4125 e
->value
.op
.uop
->name
, gfc_typename (&op1
->ts
));
4128 sprintf (msg
, _("Operands of user operator %%<%s%%> at %%L are %s/%s"),
4129 e
->value
.op
.uop
->name
, gfc_typename (&op1
->ts
),
4130 gfc_typename (&op2
->ts
));
4131 e
->value
.op
.uop
->op
->sym
->attr
.referenced
= 1;
4136 case INTRINSIC_PARENTHESES
:
4138 if (e
->ts
.type
== BT_CHARACTER
)
4139 e
->ts
.u
.cl
= op1
->ts
.u
.cl
;
4143 gfc_internal_error ("resolve_operator(): Bad intrinsic");
4146 /* Deal with arrayness of an operand through an operator. */
4150 switch (e
->value
.op
.op
)
4152 case INTRINSIC_PLUS
:
4153 case INTRINSIC_MINUS
:
4154 case INTRINSIC_TIMES
:
4155 case INTRINSIC_DIVIDE
:
4156 case INTRINSIC_POWER
:
4157 case INTRINSIC_CONCAT
:
4161 case INTRINSIC_NEQV
:
4163 case INTRINSIC_EQ_OS
:
4165 case INTRINSIC_NE_OS
:
4167 case INTRINSIC_GT_OS
:
4169 case INTRINSIC_GE_OS
:
4171 case INTRINSIC_LT_OS
:
4173 case INTRINSIC_LE_OS
:
4175 if (op1
->rank
== 0 && op2
->rank
== 0)
4178 if (op1
->rank
== 0 && op2
->rank
!= 0)
4180 e
->rank
= op2
->rank
;
4182 if (e
->shape
== NULL
)
4183 e
->shape
= gfc_copy_shape (op2
->shape
, op2
->rank
);
4186 if (op1
->rank
!= 0 && op2
->rank
== 0)
4188 e
->rank
= op1
->rank
;
4190 if (e
->shape
== NULL
)
4191 e
->shape
= gfc_copy_shape (op1
->shape
, op1
->rank
);
4194 if (op1
->rank
!= 0 && op2
->rank
!= 0)
4196 if (op1
->rank
== op2
->rank
)
4198 e
->rank
= op1
->rank
;
4199 if (e
->shape
== NULL
)
4201 t
= compare_shapes (op1
, op2
);
4205 e
->shape
= gfc_copy_shape (op1
->shape
, op1
->rank
);
4210 /* Allow higher level expressions to work. */
4213 /* Try user-defined operators, and otherwise throw an error. */
4214 dual_locus_error
= true;
4216 _("Inconsistent ranks for operator at %%L and %%L"));
4223 case INTRINSIC_PARENTHESES
:
4225 case INTRINSIC_UPLUS
:
4226 case INTRINSIC_UMINUS
:
4227 /* Simply copy arrayness attribute */
4228 e
->rank
= op1
->rank
;
4230 if (e
->shape
== NULL
)
4231 e
->shape
= gfc_copy_shape (op1
->shape
, op1
->rank
);
4239 /* Attempt to simplify the expression. */
4242 t
= gfc_simplify_expr (e
, 0);
4243 /* Some calls do not succeed in simplification and return false
4244 even though there is no error; e.g. variable references to
4245 PARAMETER arrays. */
4246 if (!gfc_is_constant_expr (e
))
4254 match m
= gfc_extend_expr (e
);
4257 if (m
== MATCH_ERROR
)
4261 if (dual_locus_error
)
4262 gfc_error (msg
, &op1
->where
, &op2
->where
);
4264 gfc_error (msg
, &e
->where
);
4270 /************** Array resolution subroutines **************/
4273 { CMP_LT
, CMP_EQ
, CMP_GT
, CMP_UNKNOWN
};
4275 /* Compare two integer expressions. */
4277 static compare_result
4278 compare_bound (gfc_expr
*a
, gfc_expr
*b
)
4282 if (a
== NULL
|| a
->expr_type
!= EXPR_CONSTANT
4283 || b
== NULL
|| b
->expr_type
!= EXPR_CONSTANT
)
4286 /* If either of the types isn't INTEGER, we must have
4287 raised an error earlier. */
4289 if (a
->ts
.type
!= BT_INTEGER
|| b
->ts
.type
!= BT_INTEGER
)
4292 i
= mpz_cmp (a
->value
.integer
, b
->value
.integer
);
4302 /* Compare an integer expression with an integer. */
4304 static compare_result
4305 compare_bound_int (gfc_expr
*a
, int b
)
4309 if (a
== NULL
|| a
->expr_type
!= EXPR_CONSTANT
)
4312 if (a
->ts
.type
!= BT_INTEGER
)
4313 gfc_internal_error ("compare_bound_int(): Bad expression");
4315 i
= mpz_cmp_si (a
->value
.integer
, b
);
4325 /* Compare an integer expression with a mpz_t. */
4327 static compare_result
4328 compare_bound_mpz_t (gfc_expr
*a
, mpz_t b
)
4332 if (a
== NULL
|| a
->expr_type
!= EXPR_CONSTANT
)
4335 if (a
->ts
.type
!= BT_INTEGER
)
4336 gfc_internal_error ("compare_bound_int(): Bad expression");
4338 i
= mpz_cmp (a
->value
.integer
, b
);
4348 /* Compute the last value of a sequence given by a triplet.
4349 Return 0 if it wasn't able to compute the last value, or if the
4350 sequence if empty, and 1 otherwise. */
4353 compute_last_value_for_triplet (gfc_expr
*start
, gfc_expr
*end
,
4354 gfc_expr
*stride
, mpz_t last
)
4358 if (start
== NULL
|| start
->expr_type
!= EXPR_CONSTANT
4359 || end
== NULL
|| end
->expr_type
!= EXPR_CONSTANT
4360 || (stride
!= NULL
&& stride
->expr_type
!= EXPR_CONSTANT
))
4363 if (start
->ts
.type
!= BT_INTEGER
|| end
->ts
.type
!= BT_INTEGER
4364 || (stride
!= NULL
&& stride
->ts
.type
!= BT_INTEGER
))
4367 if (stride
== NULL
|| compare_bound_int (stride
, 1) == CMP_EQ
)
4369 if (compare_bound (start
, end
) == CMP_GT
)
4371 mpz_set (last
, end
->value
.integer
);
4375 if (compare_bound_int (stride
, 0) == CMP_GT
)
4377 /* Stride is positive */
4378 if (mpz_cmp (start
->value
.integer
, end
->value
.integer
) > 0)
4383 /* Stride is negative */
4384 if (mpz_cmp (start
->value
.integer
, end
->value
.integer
) < 0)
4389 mpz_sub (rem
, end
->value
.integer
, start
->value
.integer
);
4390 mpz_tdiv_r (rem
, rem
, stride
->value
.integer
);
4391 mpz_sub (last
, end
->value
.integer
, rem
);
4398 /* Compare a single dimension of an array reference to the array
4402 check_dimension (int i
, gfc_array_ref
*ar
, gfc_array_spec
*as
)
4406 if (ar
->dimen_type
[i
] == DIMEN_STAR
)
4408 gcc_assert (ar
->stride
[i
] == NULL
);
4409 /* This implies [*] as [*:] and [*:3] are not possible. */
4410 if (ar
->start
[i
] == NULL
)
4412 gcc_assert (ar
->end
[i
] == NULL
);
4417 /* Given start, end and stride values, calculate the minimum and
4418 maximum referenced indexes. */
4420 switch (ar
->dimen_type
[i
])
4423 case DIMEN_THIS_IMAGE
:
4428 if (compare_bound (ar
->start
[i
], as
->lower
[i
]) == CMP_LT
)
4431 gfc_warning (0, "Array reference at %L is out of bounds "
4432 "(%ld < %ld) in dimension %d", &ar
->c_where
[i
],
4433 mpz_get_si (ar
->start
[i
]->value
.integer
),
4434 mpz_get_si (as
->lower
[i
]->value
.integer
), i
+1);
4436 gfc_warning (0, "Array reference at %L is out of bounds "
4437 "(%ld < %ld) in codimension %d", &ar
->c_where
[i
],
4438 mpz_get_si (ar
->start
[i
]->value
.integer
),
4439 mpz_get_si (as
->lower
[i
]->value
.integer
),
4443 if (compare_bound (ar
->start
[i
], as
->upper
[i
]) == CMP_GT
)
4446 gfc_warning (0, "Array reference at %L is out of bounds "
4447 "(%ld > %ld) in dimension %d", &ar
->c_where
[i
],
4448 mpz_get_si (ar
->start
[i
]->value
.integer
),
4449 mpz_get_si (as
->upper
[i
]->value
.integer
), i
+1);
4451 gfc_warning (0, "Array reference at %L is out of bounds "
4452 "(%ld > %ld) in codimension %d", &ar
->c_where
[i
],
4453 mpz_get_si (ar
->start
[i
]->value
.integer
),
4454 mpz_get_si (as
->upper
[i
]->value
.integer
),
4463 #define AR_START (ar->start[i] ? ar->start[i] : as->lower[i])
4464 #define AR_END (ar->end[i] ? ar->end[i] : as->upper[i])
4466 compare_result comp_start_end
= compare_bound (AR_START
, AR_END
);
4468 /* Check for zero stride, which is not allowed. */
4469 if (compare_bound_int (ar
->stride
[i
], 0) == CMP_EQ
)
4471 gfc_error ("Illegal stride of zero at %L", &ar
->c_where
[i
]);
4475 /* if start == len || (stride > 0 && start < len)
4476 || (stride < 0 && start > len),
4477 then the array section contains at least one element. In this
4478 case, there is an out-of-bounds access if
4479 (start < lower || start > upper). */
4480 if (compare_bound (AR_START
, AR_END
) == CMP_EQ
4481 || ((compare_bound_int (ar
->stride
[i
], 0) == CMP_GT
4482 || ar
->stride
[i
] == NULL
) && comp_start_end
== CMP_LT
)
4483 || (compare_bound_int (ar
->stride
[i
], 0) == CMP_LT
4484 && comp_start_end
== CMP_GT
))
4486 if (compare_bound (AR_START
, as
->lower
[i
]) == CMP_LT
)
4488 gfc_warning (0, "Lower array reference at %L is out of bounds "
4489 "(%ld < %ld) in dimension %d", &ar
->c_where
[i
],
4490 mpz_get_si (AR_START
->value
.integer
),
4491 mpz_get_si (as
->lower
[i
]->value
.integer
), i
+1);
4494 if (compare_bound (AR_START
, as
->upper
[i
]) == CMP_GT
)
4496 gfc_warning (0, "Lower array reference at %L is out of bounds "
4497 "(%ld > %ld) in dimension %d", &ar
->c_where
[i
],
4498 mpz_get_si (AR_START
->value
.integer
),
4499 mpz_get_si (as
->upper
[i
]->value
.integer
), i
+1);
4504 /* If we can compute the highest index of the array section,
4505 then it also has to be between lower and upper. */
4506 mpz_init (last_value
);
4507 if (compute_last_value_for_triplet (AR_START
, AR_END
, ar
->stride
[i
],
4510 if (compare_bound_mpz_t (as
->lower
[i
], last_value
) == CMP_GT
)
4512 gfc_warning (0, "Upper array reference at %L is out of bounds "
4513 "(%ld < %ld) in dimension %d", &ar
->c_where
[i
],
4514 mpz_get_si (last_value
),
4515 mpz_get_si (as
->lower
[i
]->value
.integer
), i
+1);
4516 mpz_clear (last_value
);
4519 if (compare_bound_mpz_t (as
->upper
[i
], last_value
) == CMP_LT
)
4521 gfc_warning (0, "Upper array reference at %L is out of bounds "
4522 "(%ld > %ld) in dimension %d", &ar
->c_where
[i
],
4523 mpz_get_si (last_value
),
4524 mpz_get_si (as
->upper
[i
]->value
.integer
), i
+1);
4525 mpz_clear (last_value
);
4529 mpz_clear (last_value
);
4537 gfc_internal_error ("check_dimension(): Bad array reference");
4544 /* Compare an array reference with an array specification. */
4547 compare_spec_to_ref (gfc_array_ref
*ar
)
4554 /* TODO: Full array sections are only allowed as actual parameters. */
4555 if (as
->type
== AS_ASSUMED_SIZE
4556 && (/*ar->type == AR_FULL
4557 ||*/ (ar
->type
== AR_SECTION
4558 && ar
->dimen_type
[i
] == DIMEN_RANGE
&& ar
->end
[i
] == NULL
)))
4560 gfc_error ("Rightmost upper bound of assumed size array section "
4561 "not specified at %L", &ar
->where
);
4565 if (ar
->type
== AR_FULL
)
4568 if (as
->rank
!= ar
->dimen
)
4570 gfc_error ("Rank mismatch in array reference at %L (%d/%d)",
4571 &ar
->where
, ar
->dimen
, as
->rank
);
4575 /* ar->codimen == 0 is a local array. */
4576 if (as
->corank
!= ar
->codimen
&& ar
->codimen
!= 0)
4578 gfc_error ("Coindex rank mismatch in array reference at %L (%d/%d)",
4579 &ar
->where
, ar
->codimen
, as
->corank
);
4583 for (i
= 0; i
< as
->rank
; i
++)
4584 if (!check_dimension (i
, ar
, as
))
4587 /* Local access has no coarray spec. */
4588 if (ar
->codimen
!= 0)
4589 for (i
= as
->rank
; i
< as
->rank
+ as
->corank
; i
++)
4591 if (ar
->dimen_type
[i
] != DIMEN_ELEMENT
&& !ar
->in_allocate
4592 && ar
->dimen_type
[i
] != DIMEN_THIS_IMAGE
)
4594 gfc_error ("Coindex of codimension %d must be a scalar at %L",
4595 i
+ 1 - as
->rank
, &ar
->where
);
4598 if (!check_dimension (i
, ar
, as
))
4606 /* Resolve one part of an array index. */
4609 gfc_resolve_index_1 (gfc_expr
*index
, int check_scalar
,
4610 int force_index_integer_kind
)
4617 if (!gfc_resolve_expr (index
))
4620 if (check_scalar
&& index
->rank
!= 0)
4622 gfc_error ("Array index at %L must be scalar", &index
->where
);
4626 if (index
->ts
.type
!= BT_INTEGER
&& index
->ts
.type
!= BT_REAL
)
4628 gfc_error ("Array index at %L must be of INTEGER type, found %s",
4629 &index
->where
, gfc_basic_typename (index
->ts
.type
));
4633 if (index
->ts
.type
== BT_REAL
)
4634 if (!gfc_notify_std (GFC_STD_LEGACY
, "REAL array index at %L",
4638 if ((index
->ts
.kind
!= gfc_index_integer_kind
4639 && force_index_integer_kind
)
4640 || index
->ts
.type
!= BT_INTEGER
)
4643 ts
.type
= BT_INTEGER
;
4644 ts
.kind
= gfc_index_integer_kind
;
4646 gfc_convert_type_warn (index
, &ts
, 2, 0);
4652 /* Resolve one part of an array index. */
4655 gfc_resolve_index (gfc_expr
*index
, int check_scalar
)
4657 return gfc_resolve_index_1 (index
, check_scalar
, 1);
4660 /* Resolve a dim argument to an intrinsic function. */
4663 gfc_resolve_dim_arg (gfc_expr
*dim
)
4668 if (!gfc_resolve_expr (dim
))
4673 gfc_error ("Argument dim at %L must be scalar", &dim
->where
);
4678 if (dim
->ts
.type
!= BT_INTEGER
)
4680 gfc_error ("Argument dim at %L must be of INTEGER type", &dim
->where
);
4684 if (dim
->ts
.kind
!= gfc_index_integer_kind
)
4689 ts
.type
= BT_INTEGER
;
4690 ts
.kind
= gfc_index_integer_kind
;
4692 gfc_convert_type_warn (dim
, &ts
, 2, 0);
4698 /* Given an expression that contains array references, update those array
4699 references to point to the right array specifications. While this is
4700 filled in during matching, this information is difficult to save and load
4701 in a module, so we take care of it here.
4703 The idea here is that the original array reference comes from the
4704 base symbol. We traverse the list of reference structures, setting
4705 the stored reference to references. Component references can
4706 provide an additional array specification. */
4709 find_array_spec (gfc_expr
*e
)
4715 if (e
->symtree
->n
.sym
->ts
.type
== BT_CLASS
)
4716 as
= CLASS_DATA (e
->symtree
->n
.sym
)->as
;
4718 as
= e
->symtree
->n
.sym
->as
;
4720 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
4725 gfc_internal_error ("find_array_spec(): Missing spec");
4732 c
= ref
->u
.c
.component
;
4733 if (c
->attr
.dimension
)
4736 gfc_internal_error ("find_array_spec(): unused as(1)");
4748 gfc_internal_error ("find_array_spec(): unused as(2)");
4752 /* Resolve an array reference. */
4755 resolve_array_ref (gfc_array_ref
*ar
)
4757 int i
, check_scalar
;
4760 for (i
= 0; i
< ar
->dimen
+ ar
->codimen
; i
++)
4762 check_scalar
= ar
->dimen_type
[i
] == DIMEN_RANGE
;
4764 /* Do not force gfc_index_integer_kind for the start. We can
4765 do fine with any integer kind. This avoids temporary arrays
4766 created for indexing with a vector. */
4767 if (!gfc_resolve_index_1 (ar
->start
[i
], check_scalar
, 0))
4769 if (!gfc_resolve_index (ar
->end
[i
], check_scalar
))
4771 if (!gfc_resolve_index (ar
->stride
[i
], check_scalar
))
4776 if (ar
->dimen_type
[i
] == DIMEN_UNKNOWN
)
4780 ar
->dimen_type
[i
] = DIMEN_ELEMENT
;
4784 ar
->dimen_type
[i
] = DIMEN_VECTOR
;
4785 if (e
->expr_type
== EXPR_VARIABLE
4786 && e
->symtree
->n
.sym
->ts
.type
== BT_DERIVED
)
4787 ar
->start
[i
] = gfc_get_parentheses (e
);
4791 gfc_error ("Array index at %L is an array of rank %d",
4792 &ar
->c_where
[i
], e
->rank
);
4796 /* Fill in the upper bound, which may be lower than the
4797 specified one for something like a(2:10:5), which is
4798 identical to a(2:7:5). Only relevant for strides not equal
4799 to one. Don't try a division by zero. */
4800 if (ar
->dimen_type
[i
] == DIMEN_RANGE
4801 && ar
->stride
[i
] != NULL
&& ar
->stride
[i
]->expr_type
== EXPR_CONSTANT
4802 && mpz_cmp_si (ar
->stride
[i
]->value
.integer
, 1L) != 0
4803 && mpz_cmp_si (ar
->stride
[i
]->value
.integer
, 0L) != 0)
4807 if (gfc_ref_dimen_size (ar
, i
, &size
, &end
))
4809 if (ar
->end
[i
] == NULL
)
4812 gfc_get_constant_expr (BT_INTEGER
, gfc_index_integer_kind
,
4814 mpz_set (ar
->end
[i
]->value
.integer
, end
);
4816 else if (ar
->end
[i
]->ts
.type
== BT_INTEGER
4817 && ar
->end
[i
]->expr_type
== EXPR_CONSTANT
)
4819 mpz_set (ar
->end
[i
]->value
.integer
, end
);
4830 if (ar
->type
== AR_FULL
)
4832 if (ar
->as
->rank
== 0)
4833 ar
->type
= AR_ELEMENT
;
4835 /* Make sure array is the same as array(:,:), this way
4836 we don't need to special case all the time. */
4837 ar
->dimen
= ar
->as
->rank
;
4838 for (i
= 0; i
< ar
->dimen
; i
++)
4840 ar
->dimen_type
[i
] = DIMEN_RANGE
;
4842 gcc_assert (ar
->start
[i
] == NULL
);
4843 gcc_assert (ar
->end
[i
] == NULL
);
4844 gcc_assert (ar
->stride
[i
] == NULL
);
4848 /* If the reference type is unknown, figure out what kind it is. */
4850 if (ar
->type
== AR_UNKNOWN
)
4852 ar
->type
= AR_ELEMENT
;
4853 for (i
= 0; i
< ar
->dimen
; i
++)
4854 if (ar
->dimen_type
[i
] == DIMEN_RANGE
4855 || ar
->dimen_type
[i
] == DIMEN_VECTOR
)
4857 ar
->type
= AR_SECTION
;
4862 if (!ar
->as
->cray_pointee
&& !compare_spec_to_ref (ar
))
4865 if (ar
->as
->corank
&& ar
->codimen
== 0)
4868 ar
->codimen
= ar
->as
->corank
;
4869 for (n
= ar
->dimen
; n
< ar
->dimen
+ ar
->codimen
; n
++)
4870 ar
->dimen_type
[n
] = DIMEN_THIS_IMAGE
;
4878 resolve_substring (gfc_ref
*ref
)
4880 int k
= gfc_validate_kind (BT_INTEGER
, gfc_charlen_int_kind
, false);
4882 if (ref
->u
.ss
.start
!= NULL
)
4884 if (!gfc_resolve_expr (ref
->u
.ss
.start
))
4887 if (ref
->u
.ss
.start
->ts
.type
!= BT_INTEGER
)
4889 gfc_error ("Substring start index at %L must be of type INTEGER",
4890 &ref
->u
.ss
.start
->where
);
4894 if (ref
->u
.ss
.start
->rank
!= 0)
4896 gfc_error ("Substring start index at %L must be scalar",
4897 &ref
->u
.ss
.start
->where
);
4901 if (compare_bound_int (ref
->u
.ss
.start
, 1) == CMP_LT
4902 && (compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_EQ
4903 || compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_GT
))
4905 gfc_error ("Substring start index at %L is less than one",
4906 &ref
->u
.ss
.start
->where
);
4911 if (ref
->u
.ss
.end
!= NULL
)
4913 if (!gfc_resolve_expr (ref
->u
.ss
.end
))
4916 if (ref
->u
.ss
.end
->ts
.type
!= BT_INTEGER
)
4918 gfc_error ("Substring end index at %L must be of type INTEGER",
4919 &ref
->u
.ss
.end
->where
);
4923 if (ref
->u
.ss
.end
->rank
!= 0)
4925 gfc_error ("Substring end index at %L must be scalar",
4926 &ref
->u
.ss
.end
->where
);
4930 if (ref
->u
.ss
.length
!= NULL
4931 && compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.length
->length
) == CMP_GT
4932 && (compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_EQ
4933 || compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_GT
))
4935 gfc_error ("Substring end index at %L exceeds the string length",
4936 &ref
->u
.ss
.start
->where
);
4940 if (compare_bound_mpz_t (ref
->u
.ss
.end
,
4941 gfc_integer_kinds
[k
].huge
) == CMP_GT
4942 && (compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_EQ
4943 || compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_GT
))
4945 gfc_error ("Substring end index at %L is too large",
4946 &ref
->u
.ss
.end
->where
);
4955 /* This function supplies missing substring charlens. */
4958 gfc_resolve_substring_charlen (gfc_expr
*e
)
4961 gfc_expr
*start
, *end
;
4962 gfc_typespec
*ts
= NULL
;
4964 for (char_ref
= e
->ref
; char_ref
; char_ref
= char_ref
->next
)
4966 if (char_ref
->type
== REF_SUBSTRING
|| char_ref
->type
== REF_INQUIRY
)
4968 if (char_ref
->type
== REF_COMPONENT
)
4969 ts
= &char_ref
->u
.c
.component
->ts
;
4972 if (!char_ref
|| char_ref
->type
== REF_INQUIRY
)
4975 gcc_assert (char_ref
->next
== NULL
);
4979 if (e
->ts
.u
.cl
->length
)
4980 gfc_free_expr (e
->ts
.u
.cl
->length
);
4981 else if (e
->expr_type
== EXPR_VARIABLE
&& e
->symtree
->n
.sym
->attr
.dummy
)
4985 e
->ts
.type
= BT_CHARACTER
;
4986 e
->ts
.kind
= gfc_default_character_kind
;
4989 e
->ts
.u
.cl
= gfc_new_charlen (gfc_current_ns
, NULL
);
4991 if (char_ref
->u
.ss
.start
)
4992 start
= gfc_copy_expr (char_ref
->u
.ss
.start
);
4994 start
= gfc_get_int_expr (gfc_charlen_int_kind
, NULL
, 1);
4996 if (char_ref
->u
.ss
.end
)
4997 end
= gfc_copy_expr (char_ref
->u
.ss
.end
);
4998 else if (e
->expr_type
== EXPR_VARIABLE
)
5001 ts
= &e
->symtree
->n
.sym
->ts
;
5002 end
= gfc_copy_expr (ts
->u
.cl
->length
);
5009 gfc_free_expr (start
);
5010 gfc_free_expr (end
);
5014 /* Length = (end - start + 1). */
5015 e
->ts
.u
.cl
->length
= gfc_subtract (end
, start
);
5016 e
->ts
.u
.cl
->length
= gfc_add (e
->ts
.u
.cl
->length
,
5017 gfc_get_int_expr (gfc_charlen_int_kind
,
5020 /* F2008, 6.4.1: Both the starting point and the ending point shall
5021 be within the range 1, 2, ..., n unless the starting point exceeds
5022 the ending point, in which case the substring has length zero. */
5024 if (mpz_cmp_si (e
->ts
.u
.cl
->length
->value
.integer
, 0) < 0)
5025 mpz_set_si (e
->ts
.u
.cl
->length
->value
.integer
, 0);
5027 e
->ts
.u
.cl
->length
->ts
.type
= BT_INTEGER
;
5028 e
->ts
.u
.cl
->length
->ts
.kind
= gfc_charlen_int_kind
;
5030 /* Make sure that the length is simplified. */
5031 gfc_simplify_expr (e
->ts
.u
.cl
->length
, 1);
5032 gfc_resolve_expr (e
->ts
.u
.cl
->length
);
5036 /* Resolve subtype references. */
5039 resolve_ref (gfc_expr
*expr
)
5041 int current_part_dimension
, n_components
, seen_part_dimension
;
5044 for (ref
= expr
->ref
; ref
; ref
= ref
->next
)
5045 if (ref
->type
== REF_ARRAY
&& ref
->u
.ar
.as
== NULL
)
5047 find_array_spec (expr
);
5051 for (ref
= expr
->ref
; ref
; ref
= ref
->next
)
5055 if (!resolve_array_ref (&ref
->u
.ar
))
5064 if (!resolve_substring (ref
))
5069 /* Check constraints on part references. */
5071 current_part_dimension
= 0;
5072 seen_part_dimension
= 0;
5075 for (ref
= expr
->ref
; ref
; ref
= ref
->next
)
5080 switch (ref
->u
.ar
.type
)
5083 /* Coarray scalar. */
5084 if (ref
->u
.ar
.as
->rank
== 0)
5086 current_part_dimension
= 0;
5091 current_part_dimension
= 1;
5095 current_part_dimension
= 0;
5099 gfc_internal_error ("resolve_ref(): Bad array reference");
5105 if (current_part_dimension
|| seen_part_dimension
)
5108 if (ref
->u
.c
.component
->attr
.pointer
5109 || ref
->u
.c
.component
->attr
.proc_pointer
5110 || (ref
->u
.c
.component
->ts
.type
== BT_CLASS
5111 && CLASS_DATA (ref
->u
.c
.component
)->attr
.pointer
))
5113 gfc_error ("Component to the right of a part reference "
5114 "with nonzero rank must not have the POINTER "
5115 "attribute at %L", &expr
->where
);
5118 else if (ref
->u
.c
.component
->attr
.allocatable
5119 || (ref
->u
.c
.component
->ts
.type
== BT_CLASS
5120 && CLASS_DATA (ref
->u
.c
.component
)->attr
.allocatable
))
5123 gfc_error ("Component to the right of a part reference "
5124 "with nonzero rank must not have the ALLOCATABLE "
5125 "attribute at %L", &expr
->where
);
5138 if (((ref
->type
== REF_COMPONENT
&& n_components
> 1)
5139 || ref
->next
== NULL
)
5140 && current_part_dimension
5141 && seen_part_dimension
)
5143 gfc_error ("Two or more part references with nonzero rank must "
5144 "not be specified at %L", &expr
->where
);
5148 if (ref
->type
== REF_COMPONENT
)
5150 if (current_part_dimension
)
5151 seen_part_dimension
= 1;
5153 /* reset to make sure */
5154 current_part_dimension
= 0;
5162 /* Given an expression, determine its shape. This is easier than it sounds.
5163 Leaves the shape array NULL if it is not possible to determine the shape. */
5166 expression_shape (gfc_expr
*e
)
5168 mpz_t array
[GFC_MAX_DIMENSIONS
];
5171 if (e
->rank
<= 0 || e
->shape
!= NULL
)
5174 for (i
= 0; i
< e
->rank
; i
++)
5175 if (!gfc_array_dimen_size (e
, i
, &array
[i
]))
5178 e
->shape
= gfc_get_shape (e
->rank
);
5180 memcpy (e
->shape
, array
, e
->rank
* sizeof (mpz_t
));
5185 for (i
--; i
>= 0; i
--)
5186 mpz_clear (array
[i
]);
5190 /* Given a variable expression node, compute the rank of the expression by
5191 examining the base symbol and any reference structures it may have. */
5194 expression_rank (gfc_expr
*e
)
5199 /* Just to make sure, because EXPR_COMPCALL's also have an e->ref and that
5200 could lead to serious confusion... */
5201 gcc_assert (e
->expr_type
!= EXPR_COMPCALL
);
5205 if (e
->expr_type
== EXPR_ARRAY
)
5207 /* Constructors can have a rank different from one via RESHAPE(). */
5209 if (e
->symtree
== NULL
)
5215 e
->rank
= (e
->symtree
->n
.sym
->as
== NULL
)
5216 ? 0 : e
->symtree
->n
.sym
->as
->rank
;
5222 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
5224 if (ref
->type
== REF_COMPONENT
&& ref
->u
.c
.component
->attr
.proc_pointer
5225 && ref
->u
.c
.component
->attr
.function
&& !ref
->next
)
5226 rank
= ref
->u
.c
.component
->as
? ref
->u
.c
.component
->as
->rank
: 0;
5228 if (ref
->type
!= REF_ARRAY
)
5231 if (ref
->u
.ar
.type
== AR_FULL
)
5233 rank
= ref
->u
.ar
.as
->rank
;
5237 if (ref
->u
.ar
.type
== AR_SECTION
)
5239 /* Figure out the rank of the section. */
5241 gfc_internal_error ("expression_rank(): Two array specs");
5243 for (i
= 0; i
< ref
->u
.ar
.dimen
; i
++)
5244 if (ref
->u
.ar
.dimen_type
[i
] == DIMEN_RANGE
5245 || ref
->u
.ar
.dimen_type
[i
] == DIMEN_VECTOR
)
5255 expression_shape (e
);
5260 add_caf_get_intrinsic (gfc_expr
*e
)
5262 gfc_expr
*wrapper
, *tmp_expr
;
5266 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
5267 if (ref
->type
== REF_ARRAY
&& ref
->u
.ar
.codimen
> 0)
5272 for (n
= ref
->u
.ar
.dimen
; n
< ref
->u
.ar
.dimen
+ ref
->u
.ar
.codimen
; n
++)
5273 if (ref
->u
.ar
.dimen_type
[n
] != DIMEN_ELEMENT
)
5276 tmp_expr
= XCNEW (gfc_expr
);
5278 wrapper
= gfc_build_intrinsic_call (gfc_current_ns
, GFC_ISYM_CAF_GET
,
5279 "caf_get", tmp_expr
->where
, 1, tmp_expr
);
5280 wrapper
->ts
= e
->ts
;
5281 wrapper
->rank
= e
->rank
;
5283 wrapper
->shape
= gfc_copy_shape (e
->shape
, e
->rank
);
5290 remove_caf_get_intrinsic (gfc_expr
*e
)
5292 gcc_assert (e
->expr_type
== EXPR_FUNCTION
&& e
->value
.function
.isym
5293 && e
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
);
5294 gfc_expr
*e2
= e
->value
.function
.actual
->expr
;
5295 e
->value
.function
.actual
->expr
= NULL
;
5296 gfc_free_actual_arglist (e
->value
.function
.actual
);
5297 gfc_free_shape (&e
->shape
, e
->rank
);
5303 /* Resolve a variable expression. */
5306 resolve_variable (gfc_expr
*e
)
5313 if (e
->symtree
== NULL
)
5315 sym
= e
->symtree
->n
.sym
;
5317 /* Use same check as for TYPE(*) below; this check has to be before TYPE(*)
5318 as ts.type is set to BT_ASSUMED in resolve_symbol. */
5319 if (sym
->attr
.ext_attr
& (1 << EXT_ATTR_NO_ARG_CHECK
))
5321 if (!actual_arg
|| inquiry_argument
)
5323 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute may only "
5324 "be used as actual argument", sym
->name
, &e
->where
);
5328 /* TS 29113, 407b. */
5329 else if (e
->ts
.type
== BT_ASSUMED
)
5333 gfc_error ("Assumed-type variable %s at %L may only be used "
5334 "as actual argument", sym
->name
, &e
->where
);
5337 else if (inquiry_argument
&& !first_actual_arg
)
5339 /* FIXME: It doesn't work reliably as inquiry_argument is not set
5340 for all inquiry functions in resolve_function; the reason is
5341 that the function-name resolution happens too late in that
5343 gfc_error ("Assumed-type variable %s at %L as actual argument to "
5344 "an inquiry function shall be the first argument",
5345 sym
->name
, &e
->where
);
5349 /* TS 29113, C535b. */
5350 else if ((sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
5351 && CLASS_DATA (sym
)->as
5352 && CLASS_DATA (sym
)->as
->type
== AS_ASSUMED_RANK
)
5353 || (sym
->ts
.type
!= BT_CLASS
&& sym
->as
5354 && sym
->as
->type
== AS_ASSUMED_RANK
))
5358 gfc_error ("Assumed-rank variable %s at %L may only be used as "
5359 "actual argument", sym
->name
, &e
->where
);
5362 else if (inquiry_argument
&& !first_actual_arg
)
5364 /* FIXME: It doesn't work reliably as inquiry_argument is not set
5365 for all inquiry functions in resolve_function; the reason is
5366 that the function-name resolution happens too late in that
5368 gfc_error ("Assumed-rank variable %s at %L as actual argument "
5369 "to an inquiry function shall be the first argument",
5370 sym
->name
, &e
->where
);
5375 if ((sym
->attr
.ext_attr
& (1 << EXT_ATTR_NO_ARG_CHECK
)) && e
->ref
5376 && !(e
->ref
->type
== REF_ARRAY
&& e
->ref
->u
.ar
.type
== AR_FULL
5377 && e
->ref
->next
== NULL
))
5379 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute shall not have "
5380 "a subobject reference", sym
->name
, &e
->ref
->u
.ar
.where
);
5383 /* TS 29113, 407b. */
5384 else if (e
->ts
.type
== BT_ASSUMED
&& e
->ref
5385 && !(e
->ref
->type
== REF_ARRAY
&& e
->ref
->u
.ar
.type
== AR_FULL
5386 && e
->ref
->next
== NULL
))
5388 gfc_error ("Assumed-type variable %s at %L shall not have a subobject "
5389 "reference", sym
->name
, &e
->ref
->u
.ar
.where
);
5393 /* TS 29113, C535b. */
5394 if (((sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
5395 && CLASS_DATA (sym
)->as
5396 && CLASS_DATA (sym
)->as
->type
== AS_ASSUMED_RANK
)
5397 || (sym
->ts
.type
!= BT_CLASS
&& sym
->as
5398 && sym
->as
->type
== AS_ASSUMED_RANK
))
5400 && !(e
->ref
->type
== REF_ARRAY
&& e
->ref
->u
.ar
.type
== AR_FULL
5401 && e
->ref
->next
== NULL
))
5403 gfc_error ("Assumed-rank variable %s at %L shall not have a subobject "
5404 "reference", sym
->name
, &e
->ref
->u
.ar
.where
);
5408 /* For variables that are used in an associate (target => object) where
5409 the object's basetype is array valued while the target is scalar,
5410 the ts' type of the component refs is still array valued, which
5411 can't be translated that way. */
5412 if (sym
->assoc
&& e
->rank
== 0 && e
->ref
&& sym
->ts
.type
== BT_CLASS
5413 && sym
->assoc
->target
&& sym
->assoc
->target
->ts
.type
== BT_CLASS
5414 && CLASS_DATA (sym
->assoc
->target
)->as
)
5416 gfc_ref
*ref
= e
->ref
;
5422 ref
->u
.c
.sym
= sym
->ts
.u
.derived
;
5423 /* Stop the loop. */
5433 /* If this is an associate-name, it may be parsed with an array reference
5434 in error even though the target is scalar. Fail directly in this case.
5435 TODO Understand why class scalar expressions must be excluded. */
5436 if (sym
->assoc
&& !(sym
->ts
.type
== BT_CLASS
&& e
->rank
== 0))
5438 if (sym
->ts
.type
== BT_CLASS
)
5439 gfc_fix_class_refs (e
);
5440 if (!sym
->attr
.dimension
&& e
->ref
&& e
->ref
->type
== REF_ARRAY
)
5442 else if (sym
->attr
.dimension
&& (!e
->ref
|| e
->ref
->type
!= REF_ARRAY
))
5444 /* This can happen because the parser did not detect that the
5445 associate name is an array and the expression had no array
5447 gfc_ref
*ref
= gfc_get_ref ();
5448 ref
->type
= REF_ARRAY
;
5449 ref
->u
.ar
= *gfc_get_array_ref();
5450 ref
->u
.ar
.type
= AR_FULL
;
5453 ref
->u
.ar
.as
= sym
->as
;
5454 ref
->u
.ar
.dimen
= sym
->as
->rank
;
5462 if (sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
->attr
.generic
)
5463 sym
->ts
.u
.derived
= gfc_find_dt_in_generic (sym
->ts
.u
.derived
);
5465 /* On the other hand, the parser may not have known this is an array;
5466 in this case, we have to add a FULL reference. */
5467 if (sym
->assoc
&& sym
->attr
.dimension
&& !e
->ref
)
5469 e
->ref
= gfc_get_ref ();
5470 e
->ref
->type
= REF_ARRAY
;
5471 e
->ref
->u
.ar
.type
= AR_FULL
;
5472 e
->ref
->u
.ar
.dimen
= 0;
5475 /* Like above, but for class types, where the checking whether an array
5476 ref is present is more complicated. Furthermore make sure not to add
5477 the full array ref to _vptr or _len refs. */
5478 if (sym
->assoc
&& sym
->ts
.type
== BT_CLASS
5479 && CLASS_DATA (sym
)->attr
.dimension
5480 && (e
->ts
.type
!= BT_DERIVED
|| !e
->ts
.u
.derived
->attr
.vtype
))
5482 gfc_ref
*ref
, *newref
;
5484 newref
= gfc_get_ref ();
5485 newref
->type
= REF_ARRAY
;
5486 newref
->u
.ar
.type
= AR_FULL
;
5487 newref
->u
.ar
.dimen
= 0;
5488 /* Because this is an associate var and the first ref either is a ref to
5489 the _data component or not, no traversal of the ref chain is
5490 needed. The array ref needs to be inserted after the _data ref,
5491 or when that is not present, which may happend for polymorphic
5492 types, then at the first position. */
5496 else if (ref
->type
== REF_COMPONENT
5497 && strcmp ("_data", ref
->u
.c
.component
->name
) == 0)
5499 if (!ref
->next
|| ref
->next
->type
!= REF_ARRAY
)
5501 newref
->next
= ref
->next
;
5505 /* Array ref present already. */
5506 gfc_free_ref_list (newref
);
5508 else if (ref
->type
== REF_ARRAY
)
5509 /* Array ref present already. */
5510 gfc_free_ref_list (newref
);
5518 if (e
->ref
&& !resolve_ref (e
))
5521 if (sym
->attr
.flavor
== FL_PROCEDURE
5522 && (!sym
->attr
.function
5523 || (sym
->attr
.function
&& sym
->result
5524 && sym
->result
->attr
.proc_pointer
5525 && !sym
->result
->attr
.function
)))
5527 e
->ts
.type
= BT_PROCEDURE
;
5528 goto resolve_procedure
;
5531 if (sym
->ts
.type
!= BT_UNKNOWN
)
5532 gfc_variable_attr (e
, &e
->ts
);
5533 else if (sym
->attr
.flavor
== FL_PROCEDURE
5534 && sym
->attr
.function
&& sym
->result
5535 && sym
->result
->ts
.type
!= BT_UNKNOWN
5536 && sym
->result
->attr
.proc_pointer
)
5537 e
->ts
= sym
->result
->ts
;
5540 /* Must be a simple variable reference. */
5541 if (!gfc_set_default_type (sym
, 1, sym
->ns
))
5546 if (check_assumed_size_reference (sym
, e
))
5549 /* Deal with forward references to entries during gfc_resolve_code, to
5550 satisfy, at least partially, 12.5.2.5. */
5551 if (gfc_current_ns
->entries
5552 && current_entry_id
== sym
->entry_id
5555 && cs_base
->current
->op
!= EXEC_ENTRY
)
5557 gfc_entry_list
*entry
;
5558 gfc_formal_arglist
*formal
;
5560 bool seen
, saved_specification_expr
;
5562 /* If the symbol is a dummy... */
5563 if (sym
->attr
.dummy
&& sym
->ns
== gfc_current_ns
)
5565 entry
= gfc_current_ns
->entries
;
5568 /* ...test if the symbol is a parameter of previous entries. */
5569 for (; entry
&& entry
->id
<= current_entry_id
; entry
= entry
->next
)
5570 for (formal
= entry
->sym
->formal
; formal
; formal
= formal
->next
)
5572 if (formal
->sym
&& sym
->name
== formal
->sym
->name
)
5579 /* If it has not been seen as a dummy, this is an error. */
5582 if (specification_expr
)
5583 gfc_error ("Variable %qs, used in a specification expression"
5584 ", is referenced at %L before the ENTRY statement "
5585 "in which it is a parameter",
5586 sym
->name
, &cs_base
->current
->loc
);
5588 gfc_error ("Variable %qs is used at %L before the ENTRY "
5589 "statement in which it is a parameter",
5590 sym
->name
, &cs_base
->current
->loc
);
5595 /* Now do the same check on the specification expressions. */
5596 saved_specification_expr
= specification_expr
;
5597 specification_expr
= true;
5598 if (sym
->ts
.type
== BT_CHARACTER
5599 && !gfc_resolve_expr (sym
->ts
.u
.cl
->length
))
5603 for (n
= 0; n
< sym
->as
->rank
; n
++)
5605 if (!gfc_resolve_expr (sym
->as
->lower
[n
]))
5607 if (!gfc_resolve_expr (sym
->as
->upper
[n
]))
5610 specification_expr
= saved_specification_expr
;
5613 /* Update the symbol's entry level. */
5614 sym
->entry_id
= current_entry_id
+ 1;
5617 /* If a symbol has been host_associated mark it. This is used latter,
5618 to identify if aliasing is possible via host association. */
5619 if (sym
->attr
.flavor
== FL_VARIABLE
5620 && gfc_current_ns
->parent
5621 && (gfc_current_ns
->parent
== sym
->ns
5622 || (gfc_current_ns
->parent
->parent
5623 && gfc_current_ns
->parent
->parent
== sym
->ns
)))
5624 sym
->attr
.host_assoc
= 1;
5626 if (gfc_current_ns
->proc_name
5627 && sym
->attr
.dimension
5628 && (sym
->ns
!= gfc_current_ns
5629 || sym
->attr
.use_assoc
5630 || sym
->attr
.in_common
))
5631 gfc_current_ns
->proc_name
->attr
.array_outer_dependency
= 1;
5634 if (t
&& !resolve_procedure_expression (e
))
5637 /* F2008, C617 and C1229. */
5638 if (!inquiry_argument
&& (e
->ts
.type
== BT_CLASS
|| e
->ts
.type
== BT_DERIVED
)
5639 && gfc_is_coindexed (e
))
5641 gfc_ref
*ref
, *ref2
= NULL
;
5643 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
5645 if (ref
->type
== REF_COMPONENT
)
5647 if (ref
->type
== REF_ARRAY
&& ref
->u
.ar
.codimen
> 0)
5651 for ( ; ref
; ref
= ref
->next
)
5652 if (ref
->type
== REF_COMPONENT
)
5655 /* Expression itself is not coindexed object. */
5656 if (ref
&& e
->ts
.type
== BT_CLASS
)
5658 gfc_error ("Polymorphic subobject of coindexed object at %L",
5663 /* Expression itself is coindexed object. */
5667 c
= ref2
? ref2
->u
.c
.component
: e
->symtree
->n
.sym
->components
;
5668 for ( ; c
; c
= c
->next
)
5669 if (c
->attr
.allocatable
&& c
->ts
.type
== BT_CLASS
)
5671 gfc_error ("Coindexed object with polymorphic allocatable "
5672 "subcomponent at %L", &e
->where
);
5680 expression_rank (e
);
5682 if (t
&& flag_coarray
== GFC_FCOARRAY_LIB
&& gfc_is_coindexed (e
))
5683 add_caf_get_intrinsic (e
);
5685 /* Simplify cases where access to a parameter array results in a
5686 single constant. Suppress errors since those will have been
5687 issued before, as warnings. */
5688 if (e
->rank
== 0 && sym
->as
&& sym
->attr
.flavor
== FL_PARAMETER
)
5690 gfc_push_suppress_errors ();
5691 gfc_simplify_expr (e
, 1);
5692 gfc_pop_suppress_errors ();
5699 /* Checks to see that the correct symbol has been host associated.
5700 The only situation where this arises is that in which a twice
5701 contained function is parsed after the host association is made.
5702 Therefore, on detecting this, change the symbol in the expression
5703 and convert the array reference into an actual arglist if the old
5704 symbol is a variable. */
5706 check_host_association (gfc_expr
*e
)
5708 gfc_symbol
*sym
, *old_sym
;
5712 gfc_actual_arglist
*arg
, *tail
= NULL
;
5713 bool retval
= e
->expr_type
== EXPR_FUNCTION
;
5715 /* If the expression is the result of substitution in
5716 interface.c(gfc_extend_expr) because there is no way in
5717 which the host association can be wrong. */
5718 if (e
->symtree
== NULL
5719 || e
->symtree
->n
.sym
== NULL
5720 || e
->user_operator
)
5723 old_sym
= e
->symtree
->n
.sym
;
5725 if (gfc_current_ns
->parent
5726 && old_sym
->ns
!= gfc_current_ns
)
5728 /* Use the 'USE' name so that renamed module symbols are
5729 correctly handled. */
5730 gfc_find_symbol (e
->symtree
->name
, gfc_current_ns
, 1, &sym
);
5732 if (sym
&& old_sym
!= sym
5733 && sym
->ts
.type
== old_sym
->ts
.type
5734 && sym
->attr
.flavor
== FL_PROCEDURE
5735 && sym
->attr
.contained
)
5737 /* Clear the shape, since it might not be valid. */
5738 gfc_free_shape (&e
->shape
, e
->rank
);
5740 /* Give the expression the right symtree! */
5741 gfc_find_sym_tree (e
->symtree
->name
, NULL
, 1, &st
);
5742 gcc_assert (st
!= NULL
);
5744 if (old_sym
->attr
.flavor
== FL_PROCEDURE
5745 || e
->expr_type
== EXPR_FUNCTION
)
5747 /* Original was function so point to the new symbol, since
5748 the actual argument list is already attached to the
5750 e
->value
.function
.esym
= NULL
;
5755 /* Original was variable so convert array references into
5756 an actual arglist. This does not need any checking now
5757 since resolve_function will take care of it. */
5758 e
->value
.function
.actual
= NULL
;
5759 e
->expr_type
= EXPR_FUNCTION
;
5762 /* Ambiguity will not arise if the array reference is not
5763 the last reference. */
5764 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
5765 if (ref
->type
== REF_ARRAY
&& ref
->next
== NULL
)
5768 gcc_assert (ref
->type
== REF_ARRAY
);
5770 /* Grab the start expressions from the array ref and
5771 copy them into actual arguments. */
5772 for (n
= 0; n
< ref
->u
.ar
.dimen
; n
++)
5774 arg
= gfc_get_actual_arglist ();
5775 arg
->expr
= gfc_copy_expr (ref
->u
.ar
.start
[n
]);
5776 if (e
->value
.function
.actual
== NULL
)
5777 tail
= e
->value
.function
.actual
= arg
;
5785 /* Dump the reference list and set the rank. */
5786 gfc_free_ref_list (e
->ref
);
5788 e
->rank
= sym
->as
? sym
->as
->rank
: 0;
5791 gfc_resolve_expr (e
);
5795 /* This might have changed! */
5796 return e
->expr_type
== EXPR_FUNCTION
;
5801 gfc_resolve_character_operator (gfc_expr
*e
)
5803 gfc_expr
*op1
= e
->value
.op
.op1
;
5804 gfc_expr
*op2
= e
->value
.op
.op2
;
5805 gfc_expr
*e1
= NULL
;
5806 gfc_expr
*e2
= NULL
;
5808 gcc_assert (e
->value
.op
.op
== INTRINSIC_CONCAT
);
5810 if (op1
->ts
.u
.cl
&& op1
->ts
.u
.cl
->length
)
5811 e1
= gfc_copy_expr (op1
->ts
.u
.cl
->length
);
5812 else if (op1
->expr_type
== EXPR_CONSTANT
)
5813 e1
= gfc_get_int_expr (gfc_charlen_int_kind
, NULL
,
5814 op1
->value
.character
.length
);
5816 if (op2
->ts
.u
.cl
&& op2
->ts
.u
.cl
->length
)
5817 e2
= gfc_copy_expr (op2
->ts
.u
.cl
->length
);
5818 else if (op2
->expr_type
== EXPR_CONSTANT
)
5819 e2
= gfc_get_int_expr (gfc_charlen_int_kind
, NULL
,
5820 op2
->value
.character
.length
);
5822 e
->ts
.u
.cl
= gfc_new_charlen (gfc_current_ns
, NULL
);
5832 e
->ts
.u
.cl
->length
= gfc_add (e1
, e2
);
5833 e
->ts
.u
.cl
->length
->ts
.type
= BT_INTEGER
;
5834 e
->ts
.u
.cl
->length
->ts
.kind
= gfc_charlen_int_kind
;
5835 gfc_simplify_expr (e
->ts
.u
.cl
->length
, 0);
5836 gfc_resolve_expr (e
->ts
.u
.cl
->length
);
5842 /* Ensure that an character expression has a charlen and, if possible, a
5843 length expression. */
5846 fixup_charlen (gfc_expr
*e
)
5848 /* The cases fall through so that changes in expression type and the need
5849 for multiple fixes are picked up. In all circumstances, a charlen should
5850 be available for the middle end to hang a backend_decl on. */
5851 switch (e
->expr_type
)
5854 gfc_resolve_character_operator (e
);
5858 if (e
->expr_type
== EXPR_ARRAY
)
5859 gfc_resolve_character_array_constructor (e
);
5862 case EXPR_SUBSTRING
:
5863 if (!e
->ts
.u
.cl
&& e
->ref
)
5864 gfc_resolve_substring_charlen (e
);
5869 e
->ts
.u
.cl
= gfc_new_charlen (gfc_current_ns
, NULL
);
5876 /* Update an actual argument to include the passed-object for type-bound
5877 procedures at the right position. */
5879 static gfc_actual_arglist
*
5880 update_arglist_pass (gfc_actual_arglist
* lst
, gfc_expr
* po
, unsigned argpos
,
5883 gcc_assert (argpos
> 0);
5887 gfc_actual_arglist
* result
;
5889 result
= gfc_get_actual_arglist ();
5893 result
->name
= name
;
5899 lst
->next
= update_arglist_pass (lst
->next
, po
, argpos
- 1, name
);
5901 lst
= update_arglist_pass (NULL
, po
, argpos
- 1, name
);
5906 /* Extract the passed-object from an EXPR_COMPCALL (a copy of it). */
5909 extract_compcall_passed_object (gfc_expr
* e
)
5913 gcc_assert (e
->expr_type
== EXPR_COMPCALL
);
5915 if (e
->value
.compcall
.base_object
)
5916 po
= gfc_copy_expr (e
->value
.compcall
.base_object
);
5919 po
= gfc_get_expr ();
5920 po
->expr_type
= EXPR_VARIABLE
;
5921 po
->symtree
= e
->symtree
;
5922 po
->ref
= gfc_copy_ref (e
->ref
);
5923 po
->where
= e
->where
;
5926 if (!gfc_resolve_expr (po
))
5933 /* Update the arglist of an EXPR_COMPCALL expression to include the
5937 update_compcall_arglist (gfc_expr
* e
)
5940 gfc_typebound_proc
* tbp
;
5942 tbp
= e
->value
.compcall
.tbp
;
5947 po
= extract_compcall_passed_object (e
);
5951 if (tbp
->nopass
|| e
->value
.compcall
.ignore_pass
)
5957 if (tbp
->pass_arg_num
<= 0)
5960 e
->value
.compcall
.actual
= update_arglist_pass (e
->value
.compcall
.actual
, po
,
5968 /* Extract the passed object from a PPC call (a copy of it). */
5971 extract_ppc_passed_object (gfc_expr
*e
)
5976 po
= gfc_get_expr ();
5977 po
->expr_type
= EXPR_VARIABLE
;
5978 po
->symtree
= e
->symtree
;
5979 po
->ref
= gfc_copy_ref (e
->ref
);
5980 po
->where
= e
->where
;
5982 /* Remove PPC reference. */
5984 while ((*ref
)->next
)
5985 ref
= &(*ref
)->next
;
5986 gfc_free_ref_list (*ref
);
5989 if (!gfc_resolve_expr (po
))
5996 /* Update the actual arglist of a procedure pointer component to include the
6000 update_ppc_arglist (gfc_expr
* e
)
6004 gfc_typebound_proc
* tb
;
6006 ppc
= gfc_get_proc_ptr_comp (e
);
6014 else if (tb
->nopass
)
6017 po
= extract_ppc_passed_object (e
);
6024 gfc_error ("Passed-object at %L must be scalar", &e
->where
);
6029 if (po
->ts
.type
== BT_DERIVED
&& po
->ts
.u
.derived
->attr
.abstract
)
6031 gfc_error ("Base object for procedure-pointer component call at %L is of"
6032 " ABSTRACT type %qs", &e
->where
, po
->ts
.u
.derived
->name
);
6036 gcc_assert (tb
->pass_arg_num
> 0);
6037 e
->value
.compcall
.actual
= update_arglist_pass (e
->value
.compcall
.actual
, po
,
6045 /* Check that the object a TBP is called on is valid, i.e. it must not be
6046 of ABSTRACT type (as in subobject%abstract_parent%tbp()). */
6049 check_typebound_baseobject (gfc_expr
* e
)
6052 bool return_value
= false;
6054 base
= extract_compcall_passed_object (e
);
6058 gcc_assert (base
->ts
.type
== BT_DERIVED
|| base
->ts
.type
== BT_CLASS
);
6060 if (base
->ts
.type
== BT_CLASS
&& !gfc_expr_attr (base
).class_ok
)
6064 if (base
->ts
.type
== BT_DERIVED
&& base
->ts
.u
.derived
->attr
.abstract
)
6066 gfc_error ("Base object for type-bound procedure call at %L is of"
6067 " ABSTRACT type %qs", &e
->where
, base
->ts
.u
.derived
->name
);
6071 /* F08:C1230. If the procedure called is NOPASS,
6072 the base object must be scalar. */
6073 if (e
->value
.compcall
.tbp
->nopass
&& base
->rank
!= 0)
6075 gfc_error ("Base object for NOPASS type-bound procedure call at %L must"
6076 " be scalar", &e
->where
);
6080 return_value
= true;
6083 gfc_free_expr (base
);
6084 return return_value
;
6088 /* Resolve a call to a type-bound procedure, either function or subroutine,
6089 statically from the data in an EXPR_COMPCALL expression. The adapted
6090 arglist and the target-procedure symtree are returned. */
6093 resolve_typebound_static (gfc_expr
* e
, gfc_symtree
** target
,
6094 gfc_actual_arglist
** actual
)
6096 gcc_assert (e
->expr_type
== EXPR_COMPCALL
);
6097 gcc_assert (!e
->value
.compcall
.tbp
->is_generic
);
6099 /* Update the actual arglist for PASS. */
6100 if (!update_compcall_arglist (e
))
6103 *actual
= e
->value
.compcall
.actual
;
6104 *target
= e
->value
.compcall
.tbp
->u
.specific
;
6106 gfc_free_ref_list (e
->ref
);
6108 e
->value
.compcall
.actual
= NULL
;
6110 /* If we find a deferred typebound procedure, check for derived types
6111 that an overriding typebound procedure has not been missed. */
6112 if (e
->value
.compcall
.name
6113 && !e
->value
.compcall
.tbp
->non_overridable
6114 && e
->value
.compcall
.base_object
6115 && e
->value
.compcall
.base_object
->ts
.type
== BT_DERIVED
)
6118 gfc_symbol
*derived
;
6120 /* Use the derived type of the base_object. */
6121 derived
= e
->value
.compcall
.base_object
->ts
.u
.derived
;
6124 /* If necessary, go through the inheritance chain. */
6125 while (!st
&& derived
)
6127 /* Look for the typebound procedure 'name'. */
6128 if (derived
->f2k_derived
&& derived
->f2k_derived
->tb_sym_root
)
6129 st
= gfc_find_symtree (derived
->f2k_derived
->tb_sym_root
,
6130 e
->value
.compcall
.name
);
6132 derived
= gfc_get_derived_super_type (derived
);
6135 /* Now find the specific name in the derived type namespace. */
6136 if (st
&& st
->n
.tb
&& st
->n
.tb
->u
.specific
)
6137 gfc_find_sym_tree (st
->n
.tb
->u
.specific
->name
,
6138 derived
->ns
, 1, &st
);
6146 /* Get the ultimate declared type from an expression. In addition,
6147 return the last class/derived type reference and the copy of the
6148 reference list. If check_types is set true, derived types are
6149 identified as well as class references. */
6151 get_declared_from_expr (gfc_ref
**class_ref
, gfc_ref
**new_ref
,
6152 gfc_expr
*e
, bool check_types
)
6154 gfc_symbol
*declared
;
6161 *new_ref
= gfc_copy_ref (e
->ref
);
6163 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
6165 if (ref
->type
!= REF_COMPONENT
)
6168 if ((ref
->u
.c
.component
->ts
.type
== BT_CLASS
6169 || (check_types
&& gfc_bt_struct (ref
->u
.c
.component
->ts
.type
)))
6170 && ref
->u
.c
.component
->attr
.flavor
!= FL_PROCEDURE
)
6172 declared
= ref
->u
.c
.component
->ts
.u
.derived
;
6178 if (declared
== NULL
)
6179 declared
= e
->symtree
->n
.sym
->ts
.u
.derived
;
6185 /* Given an EXPR_COMPCALL calling a GENERIC typebound procedure, figure out
6186 which of the specific bindings (if any) matches the arglist and transform
6187 the expression into a call of that binding. */
6190 resolve_typebound_generic_call (gfc_expr
* e
, const char **name
)
6192 gfc_typebound_proc
* genproc
;
6193 const char* genname
;
6195 gfc_symbol
*derived
;
6197 gcc_assert (e
->expr_type
== EXPR_COMPCALL
);
6198 genname
= e
->value
.compcall
.name
;
6199 genproc
= e
->value
.compcall
.tbp
;
6201 if (!genproc
->is_generic
)
6204 /* Try the bindings on this type and in the inheritance hierarchy. */
6205 for (; genproc
; genproc
= genproc
->overridden
)
6209 gcc_assert (genproc
->is_generic
);
6210 for (g
= genproc
->u
.generic
; g
; g
= g
->next
)
6213 gfc_actual_arglist
* args
;
6216 gcc_assert (g
->specific
);
6218 if (g
->specific
->error
)
6221 target
= g
->specific
->u
.specific
->n
.sym
;
6223 /* Get the right arglist by handling PASS/NOPASS. */
6224 args
= gfc_copy_actual_arglist (e
->value
.compcall
.actual
);
6225 if (!g
->specific
->nopass
)
6228 po
= extract_compcall_passed_object (e
);
6231 gfc_free_actual_arglist (args
);
6235 gcc_assert (g
->specific
->pass_arg_num
> 0);
6236 gcc_assert (!g
->specific
->error
);
6237 args
= update_arglist_pass (args
, po
, g
->specific
->pass_arg_num
,
6238 g
->specific
->pass_arg
);
6240 resolve_actual_arglist (args
, target
->attr
.proc
,
6241 is_external_proc (target
)
6242 && gfc_sym_get_dummy_args (target
) == NULL
);
6244 /* Check if this arglist matches the formal. */
6245 matches
= gfc_arglist_matches_symbol (&args
, target
);
6247 /* Clean up and break out of the loop if we've found it. */
6248 gfc_free_actual_arglist (args
);
6251 e
->value
.compcall
.tbp
= g
->specific
;
6252 genname
= g
->specific_st
->name
;
6253 /* Pass along the name for CLASS methods, where the vtab
6254 procedure pointer component has to be referenced. */
6262 /* Nothing matching found! */
6263 gfc_error ("Found no matching specific binding for the call to the GENERIC"
6264 " %qs at %L", genname
, &e
->where
);
6268 /* Make sure that we have the right specific instance for the name. */
6269 derived
= get_declared_from_expr (NULL
, NULL
, e
, true);
6271 st
= gfc_find_typebound_proc (derived
, NULL
, genname
, true, &e
->where
);
6273 e
->value
.compcall
.tbp
= st
->n
.tb
;
6279 /* Resolve a call to a type-bound subroutine. */
6282 resolve_typebound_call (gfc_code
* c
, const char **name
, bool *overridable
)
6284 gfc_actual_arglist
* newactual
;
6285 gfc_symtree
* target
;
6287 /* Check that's really a SUBROUTINE. */
6288 if (!c
->expr1
->value
.compcall
.tbp
->subroutine
)
6290 if (!c
->expr1
->value
.compcall
.tbp
->is_generic
6291 && c
->expr1
->value
.compcall
.tbp
->u
.specific
6292 && c
->expr1
->value
.compcall
.tbp
->u
.specific
->n
.sym
6293 && c
->expr1
->value
.compcall
.tbp
->u
.specific
->n
.sym
->attr
.subroutine
)
6294 c
->expr1
->value
.compcall
.tbp
->subroutine
= 1;
6297 gfc_error ("%qs at %L should be a SUBROUTINE",
6298 c
->expr1
->value
.compcall
.name
, &c
->loc
);
6303 if (!check_typebound_baseobject (c
->expr1
))
6306 /* Pass along the name for CLASS methods, where the vtab
6307 procedure pointer component has to be referenced. */
6309 *name
= c
->expr1
->value
.compcall
.name
;
6311 if (!resolve_typebound_generic_call (c
->expr1
, name
))
6314 /* Pass along the NON_OVERRIDABLE attribute of the specific TBP. */
6316 *overridable
= !c
->expr1
->value
.compcall
.tbp
->non_overridable
;
6318 /* Transform into an ordinary EXEC_CALL for now. */
6320 if (!resolve_typebound_static (c
->expr1
, &target
, &newactual
))
6323 c
->ext
.actual
= newactual
;
6324 c
->symtree
= target
;
6325 c
->op
= (c
->expr1
->value
.compcall
.assign
? EXEC_ASSIGN_CALL
: EXEC_CALL
);
6327 gcc_assert (!c
->expr1
->ref
&& !c
->expr1
->value
.compcall
.actual
);
6329 gfc_free_expr (c
->expr1
);
6330 c
->expr1
= gfc_get_expr ();
6331 c
->expr1
->expr_type
= EXPR_FUNCTION
;
6332 c
->expr1
->symtree
= target
;
6333 c
->expr1
->where
= c
->loc
;
6335 return resolve_call (c
);
6339 /* Resolve a component-call expression. */
6341 resolve_compcall (gfc_expr
* e
, const char **name
)
6343 gfc_actual_arglist
* newactual
;
6344 gfc_symtree
* target
;
6346 /* Check that's really a FUNCTION. */
6347 if (!e
->value
.compcall
.tbp
->function
)
6349 gfc_error ("%qs at %L should be a FUNCTION",
6350 e
->value
.compcall
.name
, &e
->where
);
6354 /* These must not be assign-calls! */
6355 gcc_assert (!e
->value
.compcall
.assign
);
6357 if (!check_typebound_baseobject (e
))
6360 /* Pass along the name for CLASS methods, where the vtab
6361 procedure pointer component has to be referenced. */
6363 *name
= e
->value
.compcall
.name
;
6365 if (!resolve_typebound_generic_call (e
, name
))
6367 gcc_assert (!e
->value
.compcall
.tbp
->is_generic
);
6369 /* Take the rank from the function's symbol. */
6370 if (e
->value
.compcall
.tbp
->u
.specific
->n
.sym
->as
)
6371 e
->rank
= e
->value
.compcall
.tbp
->u
.specific
->n
.sym
->as
->rank
;
6373 /* For now, we simply transform it into an EXPR_FUNCTION call with the same
6374 arglist to the TBP's binding target. */
6376 if (!resolve_typebound_static (e
, &target
, &newactual
))
6379 e
->value
.function
.actual
= newactual
;
6380 e
->value
.function
.name
= NULL
;
6381 e
->value
.function
.esym
= target
->n
.sym
;
6382 e
->value
.function
.isym
= NULL
;
6383 e
->symtree
= target
;
6384 e
->ts
= target
->n
.sym
->ts
;
6385 e
->expr_type
= EXPR_FUNCTION
;
6387 /* Resolution is not necessary if this is a class subroutine; this
6388 function only has to identify the specific proc. Resolution of
6389 the call will be done next in resolve_typebound_call. */
6390 return gfc_resolve_expr (e
);
6394 static bool resolve_fl_derived (gfc_symbol
*sym
);
6397 /* Resolve a typebound function, or 'method'. First separate all
6398 the non-CLASS references by calling resolve_compcall directly. */
6401 resolve_typebound_function (gfc_expr
* e
)
6403 gfc_symbol
*declared
;
6415 /* Deal with typebound operators for CLASS objects. */
6416 expr
= e
->value
.compcall
.base_object
;
6417 overridable
= !e
->value
.compcall
.tbp
->non_overridable
;
6418 if (expr
&& expr
->ts
.type
== BT_CLASS
&& e
->value
.compcall
.name
)
6420 /* If the base_object is not a variable, the corresponding actual
6421 argument expression must be stored in e->base_expression so
6422 that the corresponding tree temporary can be used as the base
6423 object in gfc_conv_procedure_call. */
6424 if (expr
->expr_type
!= EXPR_VARIABLE
)
6426 gfc_actual_arglist
*args
;
6428 for (args
= e
->value
.function
.actual
; args
; args
= args
->next
)
6430 if (expr
== args
->expr
)
6435 /* Since the typebound operators are generic, we have to ensure
6436 that any delays in resolution are corrected and that the vtab
6439 declared
= ts
.u
.derived
;
6440 c
= gfc_find_component (declared
, "_vptr", true, true, NULL
);
6441 if (c
->ts
.u
.derived
== NULL
)
6442 c
->ts
.u
.derived
= gfc_find_derived_vtab (declared
);
6444 if (!resolve_compcall (e
, &name
))
6447 /* Use the generic name if it is there. */
6448 name
= name
? name
: e
->value
.function
.esym
->name
;
6449 e
->symtree
= expr
->symtree
;
6450 e
->ref
= gfc_copy_ref (expr
->ref
);
6451 get_declared_from_expr (&class_ref
, NULL
, e
, false);
6453 /* Trim away the extraneous references that emerge from nested
6454 use of interface.c (extend_expr). */
6455 if (class_ref
&& class_ref
->next
)
6457 gfc_free_ref_list (class_ref
->next
);
6458 class_ref
->next
= NULL
;
6460 else if (e
->ref
&& !class_ref
&& expr
->ts
.type
!= BT_CLASS
)
6462 gfc_free_ref_list (e
->ref
);
6466 gfc_add_vptr_component (e
);
6467 gfc_add_component_ref (e
, name
);
6468 e
->value
.function
.esym
= NULL
;
6469 if (expr
->expr_type
!= EXPR_VARIABLE
)
6470 e
->base_expr
= expr
;
6475 return resolve_compcall (e
, NULL
);
6477 if (!resolve_ref (e
))
6480 /* Get the CLASS declared type. */
6481 declared
= get_declared_from_expr (&class_ref
, &new_ref
, e
, true);
6483 if (!resolve_fl_derived (declared
))
6486 /* Weed out cases of the ultimate component being a derived type. */
6487 if ((class_ref
&& gfc_bt_struct (class_ref
->u
.c
.component
->ts
.type
))
6488 || (!class_ref
&& st
->n
.sym
->ts
.type
!= BT_CLASS
))
6490 gfc_free_ref_list (new_ref
);
6491 return resolve_compcall (e
, NULL
);
6494 c
= gfc_find_component (declared
, "_data", true, true, NULL
);
6495 declared
= c
->ts
.u
.derived
;
6497 /* Treat the call as if it is a typebound procedure, in order to roll
6498 out the correct name for the specific function. */
6499 if (!resolve_compcall (e
, &name
))
6501 gfc_free_ref_list (new_ref
);
6508 /* Convert the expression to a procedure pointer component call. */
6509 e
->value
.function
.esym
= NULL
;
6515 /* '_vptr' points to the vtab, which contains the procedure pointers. */
6516 gfc_add_vptr_component (e
);
6517 gfc_add_component_ref (e
, name
);
6519 /* Recover the typespec for the expression. This is really only
6520 necessary for generic procedures, where the additional call
6521 to gfc_add_component_ref seems to throw the collection of the
6522 correct typespec. */
6526 gfc_free_ref_list (new_ref
);
6531 /* Resolve a typebound subroutine, or 'method'. First separate all
6532 the non-CLASS references by calling resolve_typebound_call
6536 resolve_typebound_subroutine (gfc_code
*code
)
6538 gfc_symbol
*declared
;
6548 st
= code
->expr1
->symtree
;
6550 /* Deal with typebound operators for CLASS objects. */
6551 expr
= code
->expr1
->value
.compcall
.base_object
;
6552 overridable
= !code
->expr1
->value
.compcall
.tbp
->non_overridable
;
6553 if (expr
&& expr
->ts
.type
== BT_CLASS
&& code
->expr1
->value
.compcall
.name
)
6555 /* If the base_object is not a variable, the corresponding actual
6556 argument expression must be stored in e->base_expression so
6557 that the corresponding tree temporary can be used as the base
6558 object in gfc_conv_procedure_call. */
6559 if (expr
->expr_type
!= EXPR_VARIABLE
)
6561 gfc_actual_arglist
*args
;
6563 args
= code
->expr1
->value
.function
.actual
;
6564 for (; args
; args
= args
->next
)
6565 if (expr
== args
->expr
)
6569 /* Since the typebound operators are generic, we have to ensure
6570 that any delays in resolution are corrected and that the vtab
6572 declared
= expr
->ts
.u
.derived
;
6573 c
= gfc_find_component (declared
, "_vptr", true, true, NULL
);
6574 if (c
->ts
.u
.derived
== NULL
)
6575 c
->ts
.u
.derived
= gfc_find_derived_vtab (declared
);
6577 if (!resolve_typebound_call (code
, &name
, NULL
))
6580 /* Use the generic name if it is there. */
6581 name
= name
? name
: code
->expr1
->value
.function
.esym
->name
;
6582 code
->expr1
->symtree
= expr
->symtree
;
6583 code
->expr1
->ref
= gfc_copy_ref (expr
->ref
);
6585 /* Trim away the extraneous references that emerge from nested
6586 use of interface.c (extend_expr). */
6587 get_declared_from_expr (&class_ref
, NULL
, code
->expr1
, false);
6588 if (class_ref
&& class_ref
->next
)
6590 gfc_free_ref_list (class_ref
->next
);
6591 class_ref
->next
= NULL
;
6593 else if (code
->expr1
->ref
&& !class_ref
)
6595 gfc_free_ref_list (code
->expr1
->ref
);
6596 code
->expr1
->ref
= NULL
;
6599 /* Now use the procedure in the vtable. */
6600 gfc_add_vptr_component (code
->expr1
);
6601 gfc_add_component_ref (code
->expr1
, name
);
6602 code
->expr1
->value
.function
.esym
= NULL
;
6603 if (expr
->expr_type
!= EXPR_VARIABLE
)
6604 code
->expr1
->base_expr
= expr
;
6609 return resolve_typebound_call (code
, NULL
, NULL
);
6611 if (!resolve_ref (code
->expr1
))
6614 /* Get the CLASS declared type. */
6615 get_declared_from_expr (&class_ref
, &new_ref
, code
->expr1
, true);
6617 /* Weed out cases of the ultimate component being a derived type. */
6618 if ((class_ref
&& gfc_bt_struct (class_ref
->u
.c
.component
->ts
.type
))
6619 || (!class_ref
&& st
->n
.sym
->ts
.type
!= BT_CLASS
))
6621 gfc_free_ref_list (new_ref
);
6622 return resolve_typebound_call (code
, NULL
, NULL
);
6625 if (!resolve_typebound_call (code
, &name
, &overridable
))
6627 gfc_free_ref_list (new_ref
);
6630 ts
= code
->expr1
->ts
;
6634 /* Convert the expression to a procedure pointer component call. */
6635 code
->expr1
->value
.function
.esym
= NULL
;
6636 code
->expr1
->symtree
= st
;
6639 code
->expr1
->ref
= new_ref
;
6641 /* '_vptr' points to the vtab, which contains the procedure pointers. */
6642 gfc_add_vptr_component (code
->expr1
);
6643 gfc_add_component_ref (code
->expr1
, name
);
6645 /* Recover the typespec for the expression. This is really only
6646 necessary for generic procedures, where the additional call
6647 to gfc_add_component_ref seems to throw the collection of the
6648 correct typespec. */
6649 code
->expr1
->ts
= ts
;
6652 gfc_free_ref_list (new_ref
);
6658 /* Resolve a CALL to a Procedure Pointer Component (Subroutine). */
6661 resolve_ppc_call (gfc_code
* c
)
6663 gfc_component
*comp
;
6665 comp
= gfc_get_proc_ptr_comp (c
->expr1
);
6666 gcc_assert (comp
!= NULL
);
6668 c
->resolved_sym
= c
->expr1
->symtree
->n
.sym
;
6669 c
->expr1
->expr_type
= EXPR_VARIABLE
;
6671 if (!comp
->attr
.subroutine
)
6672 gfc_add_subroutine (&comp
->attr
, comp
->name
, &c
->expr1
->where
);
6674 if (!resolve_ref (c
->expr1
))
6677 if (!update_ppc_arglist (c
->expr1
))
6680 c
->ext
.actual
= c
->expr1
->value
.compcall
.actual
;
6682 if (!resolve_actual_arglist (c
->ext
.actual
, comp
->attr
.proc
,
6683 !(comp
->ts
.interface
6684 && comp
->ts
.interface
->formal
)))
6687 if (!pure_subroutine (comp
->ts
.interface
, comp
->name
, &c
->expr1
->where
))
6690 gfc_ppc_use (comp
, &c
->expr1
->value
.compcall
.actual
, &c
->expr1
->where
);
6696 /* Resolve a Function Call to a Procedure Pointer Component (Function). */
6699 resolve_expr_ppc (gfc_expr
* e
)
6701 gfc_component
*comp
;
6703 comp
= gfc_get_proc_ptr_comp (e
);
6704 gcc_assert (comp
!= NULL
);
6706 /* Convert to EXPR_FUNCTION. */
6707 e
->expr_type
= EXPR_FUNCTION
;
6708 e
->value
.function
.isym
= NULL
;
6709 e
->value
.function
.actual
= e
->value
.compcall
.actual
;
6711 if (comp
->as
!= NULL
)
6712 e
->rank
= comp
->as
->rank
;
6714 if (!comp
->attr
.function
)
6715 gfc_add_function (&comp
->attr
, comp
->name
, &e
->where
);
6717 if (!resolve_ref (e
))
6720 if (!resolve_actual_arglist (e
->value
.function
.actual
, comp
->attr
.proc
,
6721 !(comp
->ts
.interface
6722 && comp
->ts
.interface
->formal
)))
6725 if (!update_ppc_arglist (e
))
6728 if (!check_pure_function(e
))
6731 gfc_ppc_use (comp
, &e
->value
.compcall
.actual
, &e
->where
);
6738 gfc_is_expandable_expr (gfc_expr
*e
)
6740 gfc_constructor
*con
;
6742 if (e
->expr_type
== EXPR_ARRAY
)
6744 /* Traverse the constructor looking for variables that are flavor
6745 parameter. Parameters must be expanded since they are fully used at
6747 con
= gfc_constructor_first (e
->value
.constructor
);
6748 for (; con
; con
= gfc_constructor_next (con
))
6750 if (con
->expr
->expr_type
== EXPR_VARIABLE
6751 && con
->expr
->symtree
6752 && (con
->expr
->symtree
->n
.sym
->attr
.flavor
== FL_PARAMETER
6753 || con
->expr
->symtree
->n
.sym
->attr
.flavor
== FL_VARIABLE
))
6755 if (con
->expr
->expr_type
== EXPR_ARRAY
6756 && gfc_is_expandable_expr (con
->expr
))
6765 /* Sometimes variables in specification expressions of the result
6766 of module procedures in submodules wind up not being the 'real'
6767 dummy. Find this, if possible, in the namespace of the first
6771 fixup_unique_dummy (gfc_expr
*e
)
6773 gfc_symtree
*st
= NULL
;
6774 gfc_symbol
*s
= NULL
;
6776 if (e
->symtree
->n
.sym
->ns
->proc_name
6777 && e
->symtree
->n
.sym
->ns
->proc_name
->formal
)
6778 s
= e
->symtree
->n
.sym
->ns
->proc_name
->formal
->sym
;
6781 st
= gfc_find_symtree (s
->ns
->sym_root
, e
->symtree
->n
.sym
->name
);
6784 && st
->n
.sym
!= NULL
6785 && st
->n
.sym
->attr
.dummy
)
6789 /* Resolve an expression. That is, make sure that types of operands agree
6790 with their operators, intrinsic operators are converted to function calls
6791 for overloaded types and unresolved function references are resolved. */
6794 gfc_resolve_expr (gfc_expr
*e
)
6797 bool inquiry_save
, actual_arg_save
, first_actual_arg_save
;
6802 /* inquiry_argument only applies to variables. */
6803 inquiry_save
= inquiry_argument
;
6804 actual_arg_save
= actual_arg
;
6805 first_actual_arg_save
= first_actual_arg
;
6807 if (e
->expr_type
!= EXPR_VARIABLE
)
6809 inquiry_argument
= false;
6811 first_actual_arg
= false;
6813 else if (e
->symtree
!= NULL
6814 && *e
->symtree
->name
== '@'
6815 && e
->symtree
->n
.sym
->attr
.dummy
)
6817 /* Deal with submodule specification expressions that are not
6818 found to be referenced in module.c(read_cleanup). */
6819 fixup_unique_dummy (e
);
6822 switch (e
->expr_type
)
6825 t
= resolve_operator (e
);
6831 if (check_host_association (e
))
6832 t
= resolve_function (e
);
6834 t
= resolve_variable (e
);
6836 if (e
->ts
.type
== BT_CHARACTER
&& e
->ts
.u
.cl
== NULL
&& e
->ref
6837 && e
->ref
->type
!= REF_SUBSTRING
)
6838 gfc_resolve_substring_charlen (e
);
6843 t
= resolve_typebound_function (e
);
6846 case EXPR_SUBSTRING
:
6847 t
= resolve_ref (e
);
6856 t
= resolve_expr_ppc (e
);
6861 if (!resolve_ref (e
))
6864 t
= gfc_resolve_array_constructor (e
);
6865 /* Also try to expand a constructor. */
6868 expression_rank (e
);
6869 if (gfc_is_constant_expr (e
) || gfc_is_expandable_expr (e
))
6870 gfc_expand_constructor (e
, false);
6873 /* This provides the opportunity for the length of constructors with
6874 character valued function elements to propagate the string length
6875 to the expression. */
6876 if (t
&& e
->ts
.type
== BT_CHARACTER
)
6878 /* For efficiency, we call gfc_expand_constructor for BT_CHARACTER
6879 here rather then add a duplicate test for it above. */
6880 gfc_expand_constructor (e
, false);
6881 t
= gfc_resolve_character_array_constructor (e
);
6886 case EXPR_STRUCTURE
:
6887 t
= resolve_ref (e
);
6891 t
= resolve_structure_cons (e
, 0);
6895 t
= gfc_simplify_expr (e
, 0);
6899 gfc_internal_error ("gfc_resolve_expr(): Bad expression type");
6902 if (e
->ts
.type
== BT_CHARACTER
&& t
&& !e
->ts
.u
.cl
)
6905 inquiry_argument
= inquiry_save
;
6906 actual_arg
= actual_arg_save
;
6907 first_actual_arg
= first_actual_arg_save
;
6913 /* Resolve an expression from an iterator. They must be scalar and have
6914 INTEGER or (optionally) REAL type. */
6917 gfc_resolve_iterator_expr (gfc_expr
*expr
, bool real_ok
,
6918 const char *name_msgid
)
6920 if (!gfc_resolve_expr (expr
))
6923 if (expr
->rank
!= 0)
6925 gfc_error ("%s at %L must be a scalar", _(name_msgid
), &expr
->where
);
6929 if (expr
->ts
.type
!= BT_INTEGER
)
6931 if (expr
->ts
.type
== BT_REAL
)
6934 return gfc_notify_std (GFC_STD_F95_DEL
,
6935 "%s at %L must be integer",
6936 _(name_msgid
), &expr
->where
);
6939 gfc_error ("%s at %L must be INTEGER", _(name_msgid
),
6946 gfc_error ("%s at %L must be INTEGER", _(name_msgid
), &expr
->where
);
6954 /* Resolve the expressions in an iterator structure. If REAL_OK is
6955 false allow only INTEGER type iterators, otherwise allow REAL types.
6956 Set own_scope to true for ac-implied-do and data-implied-do as those
6957 have a separate scope such that, e.g., a INTENT(IN) doesn't apply. */
6960 gfc_resolve_iterator (gfc_iterator
*iter
, bool real_ok
, bool own_scope
)
6962 if (!gfc_resolve_iterator_expr (iter
->var
, real_ok
, "Loop variable"))
6965 if (!gfc_check_vardef_context (iter
->var
, false, false, own_scope
,
6966 _("iterator variable")))
6969 if (!gfc_resolve_iterator_expr (iter
->start
, real_ok
,
6970 "Start expression in DO loop"))
6973 if (!gfc_resolve_iterator_expr (iter
->end
, real_ok
,
6974 "End expression in DO loop"))
6977 if (!gfc_resolve_iterator_expr (iter
->step
, real_ok
,
6978 "Step expression in DO loop"))
6981 if (iter
->step
->expr_type
== EXPR_CONSTANT
)
6983 if ((iter
->step
->ts
.type
== BT_INTEGER
6984 && mpz_cmp_ui (iter
->step
->value
.integer
, 0) == 0)
6985 || (iter
->step
->ts
.type
== BT_REAL
6986 && mpfr_sgn (iter
->step
->value
.real
) == 0))
6988 gfc_error ("Step expression in DO loop at %L cannot be zero",
6989 &iter
->step
->where
);
6994 /* Convert start, end, and step to the same type as var. */
6995 if (iter
->start
->ts
.kind
!= iter
->var
->ts
.kind
6996 || iter
->start
->ts
.type
!= iter
->var
->ts
.type
)
6997 gfc_convert_type (iter
->start
, &iter
->var
->ts
, 1);
6999 if (iter
->end
->ts
.kind
!= iter
->var
->ts
.kind
7000 || iter
->end
->ts
.type
!= iter
->var
->ts
.type
)
7001 gfc_convert_type (iter
->end
, &iter
->var
->ts
, 1);
7003 if (iter
->step
->ts
.kind
!= iter
->var
->ts
.kind
7004 || iter
->step
->ts
.type
!= iter
->var
->ts
.type
)
7005 gfc_convert_type (iter
->step
, &iter
->var
->ts
, 1);
7007 if (iter
->start
->expr_type
== EXPR_CONSTANT
7008 && iter
->end
->expr_type
== EXPR_CONSTANT
7009 && iter
->step
->expr_type
== EXPR_CONSTANT
)
7012 if (iter
->start
->ts
.type
== BT_INTEGER
)
7014 sgn
= mpz_cmp_ui (iter
->step
->value
.integer
, 0);
7015 cmp
= mpz_cmp (iter
->end
->value
.integer
, iter
->start
->value
.integer
);
7019 sgn
= mpfr_sgn (iter
->step
->value
.real
);
7020 cmp
= mpfr_cmp (iter
->end
->value
.real
, iter
->start
->value
.real
);
7022 if (warn_zerotrip
&& ((sgn
> 0 && cmp
< 0) || (sgn
< 0 && cmp
> 0)))
7023 gfc_warning (OPT_Wzerotrip
,
7024 "DO loop at %L will be executed zero times",
7025 &iter
->step
->where
);
7028 if (iter
->end
->expr_type
== EXPR_CONSTANT
7029 && iter
->end
->ts
.type
== BT_INTEGER
7030 && iter
->step
->expr_type
== EXPR_CONSTANT
7031 && iter
->step
->ts
.type
== BT_INTEGER
7032 && (mpz_cmp_si (iter
->step
->value
.integer
, -1L) == 0
7033 || mpz_cmp_si (iter
->step
->value
.integer
, 1L) == 0))
7035 bool is_step_positive
= mpz_cmp_ui (iter
->step
->value
.integer
, 1) == 0;
7036 int k
= gfc_validate_kind (BT_INTEGER
, iter
->end
->ts
.kind
, false);
7038 if (is_step_positive
7039 && mpz_cmp (iter
->end
->value
.integer
, gfc_integer_kinds
[k
].huge
) == 0)
7040 gfc_warning (OPT_Wundefined_do_loop
,
7041 "DO loop at %L is undefined as it overflows",
7042 &iter
->step
->where
);
7043 else if (!is_step_positive
7044 && mpz_cmp (iter
->end
->value
.integer
,
7045 gfc_integer_kinds
[k
].min_int
) == 0)
7046 gfc_warning (OPT_Wundefined_do_loop
,
7047 "DO loop at %L is undefined as it underflows",
7048 &iter
->step
->where
);
7055 /* Traversal function for find_forall_index. f == 2 signals that
7056 that variable itself is not to be checked - only the references. */
7059 forall_index (gfc_expr
*expr
, gfc_symbol
*sym
, int *f
)
7061 if (expr
->expr_type
!= EXPR_VARIABLE
)
7064 /* A scalar assignment */
7065 if (!expr
->ref
|| *f
== 1)
7067 if (expr
->symtree
->n
.sym
== sym
)
7079 /* Check whether the FORALL index appears in the expression or not.
7080 Returns true if SYM is found in EXPR. */
7083 find_forall_index (gfc_expr
*expr
, gfc_symbol
*sym
, int f
)
7085 if (gfc_traverse_expr (expr
, sym
, forall_index
, f
))
7092 /* Resolve a list of FORALL iterators. The FORALL index-name is constrained
7093 to be a scalar INTEGER variable. The subscripts and stride are scalar
7094 INTEGERs, and if stride is a constant it must be nonzero.
7095 Furthermore "A subscript or stride in a forall-triplet-spec shall
7096 not contain a reference to any index-name in the
7097 forall-triplet-spec-list in which it appears." (7.5.4.1) */
7100 resolve_forall_iterators (gfc_forall_iterator
*it
)
7102 gfc_forall_iterator
*iter
, *iter2
;
7104 for (iter
= it
; iter
; iter
= iter
->next
)
7106 if (gfc_resolve_expr (iter
->var
)
7107 && (iter
->var
->ts
.type
!= BT_INTEGER
|| iter
->var
->rank
!= 0))
7108 gfc_error ("FORALL index-name at %L must be a scalar INTEGER",
7111 if (gfc_resolve_expr (iter
->start
)
7112 && (iter
->start
->ts
.type
!= BT_INTEGER
|| iter
->start
->rank
!= 0))
7113 gfc_error ("FORALL start expression at %L must be a scalar INTEGER",
7114 &iter
->start
->where
);
7115 if (iter
->var
->ts
.kind
!= iter
->start
->ts
.kind
)
7116 gfc_convert_type (iter
->start
, &iter
->var
->ts
, 1);
7118 if (gfc_resolve_expr (iter
->end
)
7119 && (iter
->end
->ts
.type
!= BT_INTEGER
|| iter
->end
->rank
!= 0))
7120 gfc_error ("FORALL end expression at %L must be a scalar INTEGER",
7122 if (iter
->var
->ts
.kind
!= iter
->end
->ts
.kind
)
7123 gfc_convert_type (iter
->end
, &iter
->var
->ts
, 1);
7125 if (gfc_resolve_expr (iter
->stride
))
7127 if (iter
->stride
->ts
.type
!= BT_INTEGER
|| iter
->stride
->rank
!= 0)
7128 gfc_error ("FORALL stride expression at %L must be a scalar %s",
7129 &iter
->stride
->where
, "INTEGER");
7131 if (iter
->stride
->expr_type
== EXPR_CONSTANT
7132 && mpz_cmp_ui (iter
->stride
->value
.integer
, 0) == 0)
7133 gfc_error ("FORALL stride expression at %L cannot be zero",
7134 &iter
->stride
->where
);
7136 if (iter
->var
->ts
.kind
!= iter
->stride
->ts
.kind
)
7137 gfc_convert_type (iter
->stride
, &iter
->var
->ts
, 1);
7140 for (iter
= it
; iter
; iter
= iter
->next
)
7141 for (iter2
= iter
; iter2
; iter2
= iter2
->next
)
7143 if (find_forall_index (iter2
->start
, iter
->var
->symtree
->n
.sym
, 0)
7144 || find_forall_index (iter2
->end
, iter
->var
->symtree
->n
.sym
, 0)
7145 || find_forall_index (iter2
->stride
, iter
->var
->symtree
->n
.sym
, 0))
7146 gfc_error ("FORALL index %qs may not appear in triplet "
7147 "specification at %L", iter
->var
->symtree
->name
,
7148 &iter2
->start
->where
);
7153 /* Given a pointer to a symbol that is a derived type, see if it's
7154 inaccessible, i.e. if it's defined in another module and the components are
7155 PRIVATE. The search is recursive if necessary. Returns zero if no
7156 inaccessible components are found, nonzero otherwise. */
7159 derived_inaccessible (gfc_symbol
*sym
)
7163 if (sym
->attr
.use_assoc
&& sym
->attr
.private_comp
)
7166 for (c
= sym
->components
; c
; c
= c
->next
)
7168 /* Prevent an infinite loop through this function. */
7169 if (c
->ts
.type
== BT_DERIVED
&& c
->attr
.pointer
7170 && sym
== c
->ts
.u
.derived
)
7173 if (c
->ts
.type
== BT_DERIVED
&& derived_inaccessible (c
->ts
.u
.derived
))
7181 /* Resolve the argument of a deallocate expression. The expression must be
7182 a pointer or a full array. */
7185 resolve_deallocate_expr (gfc_expr
*e
)
7187 symbol_attribute attr
;
7188 int allocatable
, pointer
;
7194 if (!gfc_resolve_expr (e
))
7197 if (e
->expr_type
!= EXPR_VARIABLE
)
7200 sym
= e
->symtree
->n
.sym
;
7201 unlimited
= UNLIMITED_POLY(sym
);
7203 if (sym
->ts
.type
== BT_CLASS
)
7205 allocatable
= CLASS_DATA (sym
)->attr
.allocatable
;
7206 pointer
= CLASS_DATA (sym
)->attr
.class_pointer
;
7210 allocatable
= sym
->attr
.allocatable
;
7211 pointer
= sym
->attr
.pointer
;
7213 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
7218 if (ref
->u
.ar
.type
!= AR_FULL
7219 && !(ref
->u
.ar
.type
== AR_ELEMENT
&& ref
->u
.ar
.as
->rank
== 0
7220 && ref
->u
.ar
.codimen
&& gfc_ref_this_image (ref
)))
7225 c
= ref
->u
.c
.component
;
7226 if (c
->ts
.type
== BT_CLASS
)
7228 allocatable
= CLASS_DATA (c
)->attr
.allocatable
;
7229 pointer
= CLASS_DATA (c
)->attr
.class_pointer
;
7233 allocatable
= c
->attr
.allocatable
;
7234 pointer
= c
->attr
.pointer
;
7245 attr
= gfc_expr_attr (e
);
7247 if (allocatable
== 0 && attr
.pointer
== 0 && !unlimited
)
7250 gfc_error ("Allocate-object at %L must be ALLOCATABLE or a POINTER",
7256 if (gfc_is_coindexed (e
))
7258 gfc_error ("Coindexed allocatable object at %L", &e
->where
);
7263 && !gfc_check_vardef_context (e
, true, true, false,
7264 _("DEALLOCATE object")))
7266 if (!gfc_check_vardef_context (e
, false, true, false,
7267 _("DEALLOCATE object")))
7274 /* Returns true if the expression e contains a reference to the symbol sym. */
7276 sym_in_expr (gfc_expr
*e
, gfc_symbol
*sym
, int *f ATTRIBUTE_UNUSED
)
7278 if (e
->expr_type
== EXPR_VARIABLE
&& e
->symtree
->n
.sym
== sym
)
7285 gfc_find_sym_in_expr (gfc_symbol
*sym
, gfc_expr
*e
)
7287 return gfc_traverse_expr (e
, sym
, sym_in_expr
, 0);
7291 /* Given the expression node e for an allocatable/pointer of derived type to be
7292 allocated, get the expression node to be initialized afterwards (needed for
7293 derived types with default initializers, and derived types with allocatable
7294 components that need nullification.) */
7297 gfc_expr_to_initialize (gfc_expr
*e
)
7303 result
= gfc_copy_expr (e
);
7305 /* Change the last array reference from AR_ELEMENT to AR_FULL. */
7306 for (ref
= result
->ref
; ref
; ref
= ref
->next
)
7307 if (ref
->type
== REF_ARRAY
&& ref
->next
== NULL
)
7309 ref
->u
.ar
.type
= AR_FULL
;
7311 for (i
= 0; i
< ref
->u
.ar
.dimen
; i
++)
7312 ref
->u
.ar
.start
[i
] = ref
->u
.ar
.end
[i
] = ref
->u
.ar
.stride
[i
] = NULL
;
7317 gfc_free_shape (&result
->shape
, result
->rank
);
7319 /* Recalculate rank, shape, etc. */
7320 gfc_resolve_expr (result
);
7325 /* If the last ref of an expression is an array ref, return a copy of the
7326 expression with that one removed. Otherwise, a copy of the original
7327 expression. This is used for allocate-expressions and pointer assignment
7328 LHS, where there may be an array specification that needs to be stripped
7329 off when using gfc_check_vardef_context. */
7332 remove_last_array_ref (gfc_expr
* e
)
7337 e2
= gfc_copy_expr (e
);
7338 for (r
= &e2
->ref
; *r
; r
= &(*r
)->next
)
7339 if ((*r
)->type
== REF_ARRAY
&& !(*r
)->next
)
7341 gfc_free_ref_list (*r
);
7350 /* Used in resolve_allocate_expr to check that a allocation-object and
7351 a source-expr are conformable. This does not catch all possible
7352 cases; in particular a runtime checking is needed. */
7355 conformable_arrays (gfc_expr
*e1
, gfc_expr
*e2
)
7358 for (tail
= e2
->ref
; tail
&& tail
->next
; tail
= tail
->next
);
7360 /* First compare rank. */
7361 if ((tail
&& e1
->rank
!= tail
->u
.ar
.as
->rank
)
7362 || (!tail
&& e1
->rank
!= e2
->rank
))
7364 gfc_error ("Source-expr at %L must be scalar or have the "
7365 "same rank as the allocate-object at %L",
7366 &e1
->where
, &e2
->where
);
7377 for (i
= 0; i
< e1
->rank
; i
++)
7379 if (tail
->u
.ar
.start
[i
] == NULL
)
7382 if (tail
->u
.ar
.end
[i
])
7384 mpz_set (s
, tail
->u
.ar
.end
[i
]->value
.integer
);
7385 mpz_sub (s
, s
, tail
->u
.ar
.start
[i
]->value
.integer
);
7386 mpz_add_ui (s
, s
, 1);
7390 mpz_set (s
, tail
->u
.ar
.start
[i
]->value
.integer
);
7393 if (mpz_cmp (e1
->shape
[i
], s
) != 0)
7395 gfc_error ("Source-expr at %L and allocate-object at %L must "
7396 "have the same shape", &e1
->where
, &e2
->where
);
7409 /* Resolve the expression in an ALLOCATE statement, doing the additional
7410 checks to see whether the expression is OK or not. The expression must
7411 have a trailing array reference that gives the size of the array. */
7414 resolve_allocate_expr (gfc_expr
*e
, gfc_code
*code
, bool *array_alloc_wo_spec
)
7416 int i
, pointer
, allocatable
, dimension
, is_abstract
;
7420 symbol_attribute attr
;
7421 gfc_ref
*ref
, *ref2
;
7424 gfc_symbol
*sym
= NULL
;
7429 /* Mark the utmost array component as being in allocate to allow DIMEN_STAR
7430 checking of coarrays. */
7431 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
7432 if (ref
->next
== NULL
)
7435 if (ref
&& ref
->type
== REF_ARRAY
)
7436 ref
->u
.ar
.in_allocate
= true;
7438 if (!gfc_resolve_expr (e
))
7441 /* Make sure the expression is allocatable or a pointer. If it is
7442 pointer, the next-to-last reference must be a pointer. */
7446 sym
= e
->symtree
->n
.sym
;
7448 /* Check whether ultimate component is abstract and CLASS. */
7451 /* Is the allocate-object unlimited polymorphic? */
7452 unlimited
= UNLIMITED_POLY(e
);
7454 if (e
->expr_type
!= EXPR_VARIABLE
)
7457 attr
= gfc_expr_attr (e
);
7458 pointer
= attr
.pointer
;
7459 dimension
= attr
.dimension
;
7460 codimension
= attr
.codimension
;
7464 if (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
))
7466 allocatable
= CLASS_DATA (sym
)->attr
.allocatable
;
7467 pointer
= CLASS_DATA (sym
)->attr
.class_pointer
;
7468 dimension
= CLASS_DATA (sym
)->attr
.dimension
;
7469 codimension
= CLASS_DATA (sym
)->attr
.codimension
;
7470 is_abstract
= CLASS_DATA (sym
)->attr
.abstract
;
7474 allocatable
= sym
->attr
.allocatable
;
7475 pointer
= sym
->attr
.pointer
;
7476 dimension
= sym
->attr
.dimension
;
7477 codimension
= sym
->attr
.codimension
;
7482 for (ref
= e
->ref
; ref
; ref2
= ref
, ref
= ref
->next
)
7487 if (ref
->u
.ar
.codimen
> 0)
7490 for (n
= ref
->u
.ar
.dimen
;
7491 n
< ref
->u
.ar
.dimen
+ ref
->u
.ar
.codimen
; n
++)
7492 if (ref
->u
.ar
.dimen_type
[n
] != DIMEN_THIS_IMAGE
)
7499 if (ref
->next
!= NULL
)
7507 gfc_error ("Coindexed allocatable object at %L",
7512 c
= ref
->u
.c
.component
;
7513 if (c
->ts
.type
== BT_CLASS
)
7515 allocatable
= CLASS_DATA (c
)->attr
.allocatable
;
7516 pointer
= CLASS_DATA (c
)->attr
.class_pointer
;
7517 dimension
= CLASS_DATA (c
)->attr
.dimension
;
7518 codimension
= CLASS_DATA (c
)->attr
.codimension
;
7519 is_abstract
= CLASS_DATA (c
)->attr
.abstract
;
7523 allocatable
= c
->attr
.allocatable
;
7524 pointer
= c
->attr
.pointer
;
7525 dimension
= c
->attr
.dimension
;
7526 codimension
= c
->attr
.codimension
;
7527 is_abstract
= c
->attr
.abstract
;
7540 /* Check for F08:C628. */
7541 if (allocatable
== 0 && pointer
== 0 && !unlimited
)
7543 gfc_error ("Allocate-object at %L must be ALLOCATABLE or a POINTER",
7548 /* Some checks for the SOURCE tag. */
7551 /* Check F03:C631. */
7552 if (!gfc_type_compatible (&e
->ts
, &code
->expr3
->ts
))
7554 gfc_error ("Type of entity at %L is type incompatible with "
7555 "source-expr at %L", &e
->where
, &code
->expr3
->where
);
7559 /* Check F03:C632 and restriction following Note 6.18. */
7560 if (code
->expr3
->rank
> 0 && !conformable_arrays (code
->expr3
, e
))
7563 /* Check F03:C633. */
7564 if (code
->expr3
->ts
.kind
!= e
->ts
.kind
&& !unlimited
)
7566 gfc_error ("The allocate-object at %L and the source-expr at %L "
7567 "shall have the same kind type parameter",
7568 &e
->where
, &code
->expr3
->where
);
7572 /* Check F2008, C642. */
7573 if (code
->expr3
->ts
.type
== BT_DERIVED
7574 && ((codimension
&& gfc_expr_attr (code
->expr3
).lock_comp
)
7575 || (code
->expr3
->ts
.u
.derived
->from_intmod
7576 == INTMOD_ISO_FORTRAN_ENV
7577 && code
->expr3
->ts
.u
.derived
->intmod_sym_id
7578 == ISOFORTRAN_LOCK_TYPE
)))
7580 gfc_error ("The source-expr at %L shall neither be of type "
7581 "LOCK_TYPE nor have a LOCK_TYPE component if "
7582 "allocate-object at %L is a coarray",
7583 &code
->expr3
->where
, &e
->where
);
7587 /* Check TS18508, C702/C703. */
7588 if (code
->expr3
->ts
.type
== BT_DERIVED
7589 && ((codimension
&& gfc_expr_attr (code
->expr3
).event_comp
)
7590 || (code
->expr3
->ts
.u
.derived
->from_intmod
7591 == INTMOD_ISO_FORTRAN_ENV
7592 && code
->expr3
->ts
.u
.derived
->intmod_sym_id
7593 == ISOFORTRAN_EVENT_TYPE
)))
7595 gfc_error ("The source-expr at %L shall neither be of type "
7596 "EVENT_TYPE nor have a EVENT_TYPE component if "
7597 "allocate-object at %L is a coarray",
7598 &code
->expr3
->where
, &e
->where
);
7603 /* Check F08:C629. */
7604 if (is_abstract
&& code
->ext
.alloc
.ts
.type
== BT_UNKNOWN
7607 gcc_assert (e
->ts
.type
== BT_CLASS
);
7608 gfc_error ("Allocating %s of ABSTRACT base type at %L requires a "
7609 "type-spec or source-expr", sym
->name
, &e
->where
);
7613 /* Check F08:C632. */
7614 if (code
->ext
.alloc
.ts
.type
== BT_CHARACTER
&& !e
->ts
.deferred
7615 && !UNLIMITED_POLY (e
))
7619 if (!e
->ts
.u
.cl
->length
)
7622 cmp
= gfc_dep_compare_expr (e
->ts
.u
.cl
->length
,
7623 code
->ext
.alloc
.ts
.u
.cl
->length
);
7624 if (cmp
== 1 || cmp
== -1 || cmp
== -3)
7626 gfc_error ("Allocating %s at %L with type-spec requires the same "
7627 "character-length parameter as in the declaration",
7628 sym
->name
, &e
->where
);
7633 /* In the variable definition context checks, gfc_expr_attr is used
7634 on the expression. This is fooled by the array specification
7635 present in e, thus we have to eliminate that one temporarily. */
7636 e2
= remove_last_array_ref (e
);
7639 t
= gfc_check_vardef_context (e2
, true, true, false,
7640 _("ALLOCATE object"));
7642 t
= gfc_check_vardef_context (e2
, false, true, false,
7643 _("ALLOCATE object"));
7648 if (e
->ts
.type
== BT_CLASS
&& CLASS_DATA (e
)->attr
.dimension
7649 && !code
->expr3
&& code
->ext
.alloc
.ts
.type
== BT_DERIVED
)
7651 /* For class arrays, the initialization with SOURCE is done
7652 using _copy and trans_call. It is convenient to exploit that
7653 when the allocated type is different from the declared type but
7654 no SOURCE exists by setting expr3. */
7655 code
->expr3
= gfc_default_initializer (&code
->ext
.alloc
.ts
);
7657 else if (flag_coarray
!= GFC_FCOARRAY_LIB
&& e
->ts
.type
== BT_DERIVED
7658 && e
->ts
.u
.derived
->from_intmod
== INTMOD_ISO_FORTRAN_ENV
7659 && e
->ts
.u
.derived
->intmod_sym_id
== ISOFORTRAN_EVENT_TYPE
)
7661 /* We have to zero initialize the integer variable. */
7662 code
->expr3
= gfc_get_int_expr (gfc_default_integer_kind
, &e
->where
, 0);
7665 if (e
->ts
.type
== BT_CLASS
&& !unlimited
&& !UNLIMITED_POLY (code
->expr3
))
7667 /* Make sure the vtab symbol is present when
7668 the module variables are generated. */
7669 gfc_typespec ts
= e
->ts
;
7671 ts
= code
->expr3
->ts
;
7672 else if (code
->ext
.alloc
.ts
.type
== BT_DERIVED
)
7673 ts
= code
->ext
.alloc
.ts
;
7675 /* Finding the vtab also publishes the type's symbol. Therefore this
7676 statement is necessary. */
7677 gfc_find_derived_vtab (ts
.u
.derived
);
7679 else if (unlimited
&& !UNLIMITED_POLY (code
->expr3
))
7681 /* Again, make sure the vtab symbol is present when
7682 the module variables are generated. */
7683 gfc_typespec
*ts
= NULL
;
7685 ts
= &code
->expr3
->ts
;
7687 ts
= &code
->ext
.alloc
.ts
;
7691 /* Finding the vtab also publishes the type's symbol. Therefore this
7692 statement is necessary. */
7696 if (dimension
== 0 && codimension
== 0)
7699 /* Make sure the last reference node is an array specification. */
7701 if (!ref2
|| ref2
->type
!= REF_ARRAY
|| ref2
->u
.ar
.type
== AR_FULL
7702 || (dimension
&& ref2
->u
.ar
.dimen
== 0))
7707 if (!gfc_notify_std (GFC_STD_F2008
, "Array specification required "
7708 "in ALLOCATE statement at %L", &e
->where
))
7710 if (code
->expr3
->rank
!= 0)
7711 *array_alloc_wo_spec
= true;
7714 gfc_error ("Array specification or array-valued SOURCE= "
7715 "expression required in ALLOCATE statement at %L",
7722 gfc_error ("Array specification required in ALLOCATE statement "
7723 "at %L", &e
->where
);
7728 /* Make sure that the array section reference makes sense in the
7729 context of an ALLOCATE specification. */
7734 for (i
= ar
->dimen
; i
< ar
->dimen
+ ar
->codimen
; i
++)
7735 if (ar
->dimen_type
[i
] == DIMEN_THIS_IMAGE
)
7737 gfc_error ("Coarray specification required in ALLOCATE statement "
7738 "at %L", &e
->where
);
7742 for (i
= 0; i
< ar
->dimen
; i
++)
7744 if (ar
->type
== AR_ELEMENT
|| ar
->type
== AR_FULL
)
7747 switch (ar
->dimen_type
[i
])
7753 if (ar
->start
[i
] != NULL
7754 && ar
->end
[i
] != NULL
7755 && ar
->stride
[i
] == NULL
)
7763 case DIMEN_THIS_IMAGE
:
7764 gfc_error ("Bad array specification in ALLOCATE statement at %L",
7770 for (a
= code
->ext
.alloc
.list
; a
; a
= a
->next
)
7772 sym
= a
->expr
->symtree
->n
.sym
;
7774 /* TODO - check derived type components. */
7775 if (gfc_bt_struct (sym
->ts
.type
) || sym
->ts
.type
== BT_CLASS
)
7778 if ((ar
->start
[i
] != NULL
7779 && gfc_find_sym_in_expr (sym
, ar
->start
[i
]))
7780 || (ar
->end
[i
] != NULL
7781 && gfc_find_sym_in_expr (sym
, ar
->end
[i
])))
7783 gfc_error ("%qs must not appear in the array specification at "
7784 "%L in the same ALLOCATE statement where it is "
7785 "itself allocated", sym
->name
, &ar
->where
);
7791 for (i
= ar
->dimen
; i
< ar
->codimen
+ ar
->dimen
; i
++)
7793 if (ar
->dimen_type
[i
] == DIMEN_ELEMENT
7794 || ar
->dimen_type
[i
] == DIMEN_RANGE
)
7796 if (i
== (ar
->dimen
+ ar
->codimen
- 1))
7798 gfc_error ("Expected '*' in coindex specification in ALLOCATE "
7799 "statement at %L", &e
->where
);
7805 if (ar
->dimen_type
[i
] == DIMEN_STAR
&& i
== (ar
->dimen
+ ar
->codimen
- 1)
7806 && ar
->stride
[i
] == NULL
)
7809 gfc_error ("Bad coarray specification in ALLOCATE statement at %L",
7823 resolve_allocate_deallocate (gfc_code
*code
, const char *fcn
)
7825 gfc_expr
*stat
, *errmsg
, *pe
, *qe
;
7826 gfc_alloc
*a
, *p
, *q
;
7829 errmsg
= code
->expr2
;
7831 /* Check the stat variable. */
7834 gfc_check_vardef_context (stat
, false, false, false,
7835 _("STAT variable"));
7837 if ((stat
->ts
.type
!= BT_INTEGER
7838 && !(stat
->ref
&& (stat
->ref
->type
== REF_ARRAY
7839 || stat
->ref
->type
== REF_COMPONENT
)))
7841 gfc_error ("Stat-variable at %L must be a scalar INTEGER "
7842 "variable", &stat
->where
);
7844 for (p
= code
->ext
.alloc
.list
; p
; p
= p
->next
)
7845 if (p
->expr
->symtree
->n
.sym
->name
== stat
->symtree
->n
.sym
->name
)
7847 gfc_ref
*ref1
, *ref2
;
7850 for (ref1
= p
->expr
->ref
, ref2
= stat
->ref
; ref1
&& ref2
;
7851 ref1
= ref1
->next
, ref2
= ref2
->next
)
7853 if (ref1
->type
!= REF_COMPONENT
|| ref2
->type
!= REF_COMPONENT
)
7855 if (ref1
->u
.c
.component
->name
!= ref2
->u
.c
.component
->name
)
7864 gfc_error ("Stat-variable at %L shall not be %sd within "
7865 "the same %s statement", &stat
->where
, fcn
, fcn
);
7871 /* Check the errmsg variable. */
7875 gfc_warning (0, "ERRMSG at %L is useless without a STAT tag",
7878 gfc_check_vardef_context (errmsg
, false, false, false,
7879 _("ERRMSG variable"));
7881 /* F18:R928 alloc-opt is ERRMSG = errmsg-variable
7882 F18:R930 errmsg-variable is scalar-default-char-variable
7883 F18:R906 default-char-variable is variable
7884 F18:C906 default-char-variable shall be default character. */
7885 if ((errmsg
->ts
.type
!= BT_CHARACTER
7887 && (errmsg
->ref
->type
== REF_ARRAY
7888 || errmsg
->ref
->type
== REF_COMPONENT
)))
7890 || errmsg
->ts
.kind
!= gfc_default_character_kind
)
7891 gfc_error ("ERRMSG variable at %L shall be a scalar default CHARACTER "
7892 "variable", &errmsg
->where
);
7894 for (p
= code
->ext
.alloc
.list
; p
; p
= p
->next
)
7895 if (p
->expr
->symtree
->n
.sym
->name
== errmsg
->symtree
->n
.sym
->name
)
7897 gfc_ref
*ref1
, *ref2
;
7900 for (ref1
= p
->expr
->ref
, ref2
= errmsg
->ref
; ref1
&& ref2
;
7901 ref1
= ref1
->next
, ref2
= ref2
->next
)
7903 if (ref1
->type
!= REF_COMPONENT
|| ref2
->type
!= REF_COMPONENT
)
7905 if (ref1
->u
.c
.component
->name
!= ref2
->u
.c
.component
->name
)
7914 gfc_error ("Errmsg-variable at %L shall not be %sd within "
7915 "the same %s statement", &errmsg
->where
, fcn
, fcn
);
7921 /* Check that an allocate-object appears only once in the statement. */
7923 for (p
= code
->ext
.alloc
.list
; p
; p
= p
->next
)
7926 for (q
= p
->next
; q
; q
= q
->next
)
7929 if (pe
->symtree
->n
.sym
->name
== qe
->symtree
->n
.sym
->name
)
7931 /* This is a potential collision. */
7932 gfc_ref
*pr
= pe
->ref
;
7933 gfc_ref
*qr
= qe
->ref
;
7935 /* Follow the references until
7936 a) They start to differ, in which case there is no error;
7937 you can deallocate a%b and a%c in a single statement
7938 b) Both of them stop, which is an error
7939 c) One of them stops, which is also an error. */
7942 if (pr
== NULL
&& qr
== NULL
)
7944 gfc_error ("Allocate-object at %L also appears at %L",
7945 &pe
->where
, &qe
->where
);
7948 else if (pr
!= NULL
&& qr
== NULL
)
7950 gfc_error ("Allocate-object at %L is subobject of"
7951 " object at %L", &pe
->where
, &qe
->where
);
7954 else if (pr
== NULL
&& qr
!= NULL
)
7956 gfc_error ("Allocate-object at %L is subobject of"
7957 " object at %L", &qe
->where
, &pe
->where
);
7960 /* Here, pr != NULL && qr != NULL */
7961 gcc_assert(pr
->type
== qr
->type
);
7962 if (pr
->type
== REF_ARRAY
)
7964 /* Handle cases like allocate(v(3)%x(3), v(2)%x(3)),
7966 gcc_assert (qr
->type
== REF_ARRAY
);
7968 if (pr
->next
&& qr
->next
)
7971 gfc_array_ref
*par
= &(pr
->u
.ar
);
7972 gfc_array_ref
*qar
= &(qr
->u
.ar
);
7974 for (i
=0; i
<par
->dimen
; i
++)
7976 if ((par
->start
[i
] != NULL
7977 || qar
->start
[i
] != NULL
)
7978 && gfc_dep_compare_expr (par
->start
[i
],
7979 qar
->start
[i
]) != 0)
7986 if (pr
->u
.c
.component
->name
!= qr
->u
.c
.component
->name
)
7999 if (strcmp (fcn
, "ALLOCATE") == 0)
8001 bool arr_alloc_wo_spec
= false;
8003 /* Resolving the expr3 in the loop over all objects to allocate would
8004 execute loop invariant code for each loop item. Therefore do it just
8006 if (code
->expr3
&& code
->expr3
->mold
8007 && code
->expr3
->ts
.type
== BT_DERIVED
)
8009 /* Default initialization via MOLD (non-polymorphic). */
8010 gfc_expr
*rhs
= gfc_default_initializer (&code
->expr3
->ts
);
8013 gfc_resolve_expr (rhs
);
8014 gfc_free_expr (code
->expr3
);
8018 for (a
= code
->ext
.alloc
.list
; a
; a
= a
->next
)
8019 resolve_allocate_expr (a
->expr
, code
, &arr_alloc_wo_spec
);
8021 if (arr_alloc_wo_spec
&& code
->expr3
)
8023 /* Mark the allocate to have to take the array specification
8025 code
->ext
.alloc
.arr_spec_from_expr3
= 1;
8030 for (a
= code
->ext
.alloc
.list
; a
; a
= a
->next
)
8031 resolve_deallocate_expr (a
->expr
);
8036 /************ SELECT CASE resolution subroutines ************/
8038 /* Callback function for our mergesort variant. Determines interval
8039 overlaps for CASEs. Return <0 if op1 < op2, 0 for overlap, >0 for
8040 op1 > op2. Assumes we're not dealing with the default case.
8041 We have op1 = (:L), (K:L) or (K:) and op2 = (:N), (M:N) or (M:).
8042 There are nine situations to check. */
8045 compare_cases (const gfc_case
*op1
, const gfc_case
*op2
)
8049 if (op1
->low
== NULL
) /* op1 = (:L) */
8051 /* op2 = (:N), so overlap. */
8053 /* op2 = (M:) or (M:N), L < M */
8054 if (op2
->low
!= NULL
8055 && gfc_compare_expr (op1
->high
, op2
->low
, INTRINSIC_LT
) < 0)
8058 else if (op1
->high
== NULL
) /* op1 = (K:) */
8060 /* op2 = (M:), so overlap. */
8062 /* op2 = (:N) or (M:N), K > N */
8063 if (op2
->high
!= NULL
8064 && gfc_compare_expr (op1
->low
, op2
->high
, INTRINSIC_GT
) > 0)
8067 else /* op1 = (K:L) */
8069 if (op2
->low
== NULL
) /* op2 = (:N), K > N */
8070 retval
= (gfc_compare_expr (op1
->low
, op2
->high
, INTRINSIC_GT
) > 0)
8072 else if (op2
->high
== NULL
) /* op2 = (M:), L < M */
8073 retval
= (gfc_compare_expr (op1
->high
, op2
->low
, INTRINSIC_LT
) < 0)
8075 else /* op2 = (M:N) */
8079 if (gfc_compare_expr (op1
->high
, op2
->low
, INTRINSIC_LT
) < 0)
8082 else if (gfc_compare_expr (op1
->low
, op2
->high
, INTRINSIC_GT
) > 0)
8091 /* Merge-sort a double linked case list, detecting overlap in the
8092 process. LIST is the head of the double linked case list before it
8093 is sorted. Returns the head of the sorted list if we don't see any
8094 overlap, or NULL otherwise. */
8097 check_case_overlap (gfc_case
*list
)
8099 gfc_case
*p
, *q
, *e
, *tail
;
8100 int insize
, nmerges
, psize
, qsize
, cmp
, overlap_seen
;
8102 /* If the passed list was empty, return immediately. */
8109 /* Loop unconditionally. The only exit from this loop is a return
8110 statement, when we've finished sorting the case list. */
8117 /* Count the number of merges we do in this pass. */
8120 /* Loop while there exists a merge to be done. */
8125 /* Count this merge. */
8128 /* Cut the list in two pieces by stepping INSIZE places
8129 forward in the list, starting from P. */
8132 for (i
= 0; i
< insize
; i
++)
8141 /* Now we have two lists. Merge them! */
8142 while (psize
> 0 || (qsize
> 0 && q
!= NULL
))
8144 /* See from which the next case to merge comes from. */
8147 /* P is empty so the next case must come from Q. */
8152 else if (qsize
== 0 || q
== NULL
)
8161 cmp
= compare_cases (p
, q
);
8164 /* The whole case range for P is less than the
8172 /* The whole case range for Q is greater than
8173 the case range for P. */
8180 /* The cases overlap, or they are the same
8181 element in the list. Either way, we must
8182 issue an error and get the next case from P. */
8183 /* FIXME: Sort P and Q by line number. */
8184 gfc_error ("CASE label at %L overlaps with CASE "
8185 "label at %L", &p
->where
, &q
->where
);
8193 /* Add the next element to the merged list. */
8202 /* P has now stepped INSIZE places along, and so has Q. So
8203 they're the same. */
8208 /* If we have done only one merge or none at all, we've
8209 finished sorting the cases. */
8218 /* Otherwise repeat, merging lists twice the size. */
8224 /* Check to see if an expression is suitable for use in a CASE statement.
8225 Makes sure that all case expressions are scalar constants of the same
8226 type. Return false if anything is wrong. */
8229 validate_case_label_expr (gfc_expr
*e
, gfc_expr
*case_expr
)
8231 if (e
== NULL
) return true;
8233 if (e
->ts
.type
!= case_expr
->ts
.type
)
8235 gfc_error ("Expression in CASE statement at %L must be of type %s",
8236 &e
->where
, gfc_basic_typename (case_expr
->ts
.type
));
8240 /* C805 (R808) For a given case-construct, each case-value shall be of
8241 the same type as case-expr. For character type, length differences
8242 are allowed, but the kind type parameters shall be the same. */
8244 if (case_expr
->ts
.type
== BT_CHARACTER
&& e
->ts
.kind
!= case_expr
->ts
.kind
)
8246 gfc_error ("Expression in CASE statement at %L must be of kind %d",
8247 &e
->where
, case_expr
->ts
.kind
);
8251 /* Convert the case value kind to that of case expression kind,
8254 if (e
->ts
.kind
!= case_expr
->ts
.kind
)
8255 gfc_convert_type_warn (e
, &case_expr
->ts
, 2, 0);
8259 gfc_error ("Expression in CASE statement at %L must be scalar",
8268 /* Given a completely parsed select statement, we:
8270 - Validate all expressions and code within the SELECT.
8271 - Make sure that the selection expression is not of the wrong type.
8272 - Make sure that no case ranges overlap.
8273 - Eliminate unreachable cases and unreachable code resulting from
8274 removing case labels.
8276 The standard does allow unreachable cases, e.g. CASE (5:3). But
8277 they are a hassle for code generation, and to prevent that, we just
8278 cut them out here. This is not necessary for overlapping cases
8279 because they are illegal and we never even try to generate code.
8281 We have the additional caveat that a SELECT construct could have
8282 been a computed GOTO in the source code. Fortunately we can fairly
8283 easily work around that here: The case_expr for a "real" SELECT CASE
8284 is in code->expr1, but for a computed GOTO it is in code->expr2. All
8285 we have to do is make sure that the case_expr is a scalar integer
8289 resolve_select (gfc_code
*code
, bool select_type
)
8292 gfc_expr
*case_expr
;
8293 gfc_case
*cp
, *default_case
, *tail
, *head
;
8294 int seen_unreachable
;
8300 if (code
->expr1
== NULL
)
8302 /* This was actually a computed GOTO statement. */
8303 case_expr
= code
->expr2
;
8304 if (case_expr
->ts
.type
!= BT_INTEGER
|| case_expr
->rank
!= 0)
8305 gfc_error ("Selection expression in computed GOTO statement "
8306 "at %L must be a scalar integer expression",
8309 /* Further checking is not necessary because this SELECT was built
8310 by the compiler, so it should always be OK. Just move the
8311 case_expr from expr2 to expr so that we can handle computed
8312 GOTOs as normal SELECTs from here on. */
8313 code
->expr1
= code
->expr2
;
8318 case_expr
= code
->expr1
;
8319 type
= case_expr
->ts
.type
;
8322 if (type
!= BT_LOGICAL
&& type
!= BT_INTEGER
&& type
!= BT_CHARACTER
)
8324 gfc_error ("Argument of SELECT statement at %L cannot be %s",
8325 &case_expr
->where
, gfc_typename (&case_expr
->ts
));
8327 /* Punt. Going on here just produce more garbage error messages. */
8332 if (!select_type
&& case_expr
->rank
!= 0)
8334 gfc_error ("Argument of SELECT statement at %L must be a scalar "
8335 "expression", &case_expr
->where
);
8341 /* Raise a warning if an INTEGER case value exceeds the range of
8342 the case-expr. Later, all expressions will be promoted to the
8343 largest kind of all case-labels. */
8345 if (type
== BT_INTEGER
)
8346 for (body
= code
->block
; body
; body
= body
->block
)
8347 for (cp
= body
->ext
.block
.case_list
; cp
; cp
= cp
->next
)
8350 && gfc_check_integer_range (cp
->low
->value
.integer
,
8351 case_expr
->ts
.kind
) != ARITH_OK
)
8352 gfc_warning (0, "Expression in CASE statement at %L is "
8353 "not in the range of %s", &cp
->low
->where
,
8354 gfc_typename (&case_expr
->ts
));
8357 && cp
->low
!= cp
->high
8358 && gfc_check_integer_range (cp
->high
->value
.integer
,
8359 case_expr
->ts
.kind
) != ARITH_OK
)
8360 gfc_warning (0, "Expression in CASE statement at %L is "
8361 "not in the range of %s", &cp
->high
->where
,
8362 gfc_typename (&case_expr
->ts
));
8365 /* PR 19168 has a long discussion concerning a mismatch of the kinds
8366 of the SELECT CASE expression and its CASE values. Walk the lists
8367 of case values, and if we find a mismatch, promote case_expr to
8368 the appropriate kind. */
8370 if (type
== BT_LOGICAL
|| type
== BT_INTEGER
)
8372 for (body
= code
->block
; body
; body
= body
->block
)
8374 /* Walk the case label list. */
8375 for (cp
= body
->ext
.block
.case_list
; cp
; cp
= cp
->next
)
8377 /* Intercept the DEFAULT case. It does not have a kind. */
8378 if (cp
->low
== NULL
&& cp
->high
== NULL
)
8381 /* Unreachable case ranges are discarded, so ignore. */
8382 if (cp
->low
!= NULL
&& cp
->high
!= NULL
8383 && cp
->low
!= cp
->high
8384 && gfc_compare_expr (cp
->low
, cp
->high
, INTRINSIC_GT
) > 0)
8388 && case_expr
->ts
.kind
!= gfc_kind_max(case_expr
, cp
->low
))
8389 gfc_convert_type_warn (case_expr
, &cp
->low
->ts
, 2, 0);
8391 if (cp
->high
!= NULL
8392 && case_expr
->ts
.kind
!= gfc_kind_max(case_expr
, cp
->high
))
8393 gfc_convert_type_warn (case_expr
, &cp
->high
->ts
, 2, 0);
8398 /* Assume there is no DEFAULT case. */
8399 default_case
= NULL
;
8404 for (body
= code
->block
; body
; body
= body
->block
)
8406 /* Assume the CASE list is OK, and all CASE labels can be matched. */
8408 seen_unreachable
= 0;
8410 /* Walk the case label list, making sure that all case labels
8412 for (cp
= body
->ext
.block
.case_list
; cp
; cp
= cp
->next
)
8414 /* Count the number of cases in the whole construct. */
8417 /* Intercept the DEFAULT case. */
8418 if (cp
->low
== NULL
&& cp
->high
== NULL
)
8420 if (default_case
!= NULL
)
8422 gfc_error ("The DEFAULT CASE at %L cannot be followed "
8423 "by a second DEFAULT CASE at %L",
8424 &default_case
->where
, &cp
->where
);
8435 /* Deal with single value cases and case ranges. Errors are
8436 issued from the validation function. */
8437 if (!validate_case_label_expr (cp
->low
, case_expr
)
8438 || !validate_case_label_expr (cp
->high
, case_expr
))
8444 if (type
== BT_LOGICAL
8445 && ((cp
->low
== NULL
|| cp
->high
== NULL
)
8446 || cp
->low
!= cp
->high
))
8448 gfc_error ("Logical range in CASE statement at %L is not "
8449 "allowed", &cp
->low
->where
);
8454 if (type
== BT_LOGICAL
&& cp
->low
->expr_type
== EXPR_CONSTANT
)
8457 value
= cp
->low
->value
.logical
== 0 ? 2 : 1;
8458 if (value
& seen_logical
)
8460 gfc_error ("Constant logical value in CASE statement "
8461 "is repeated at %L",
8466 seen_logical
|= value
;
8469 if (cp
->low
!= NULL
&& cp
->high
!= NULL
8470 && cp
->low
!= cp
->high
8471 && gfc_compare_expr (cp
->low
, cp
->high
, INTRINSIC_GT
) > 0)
8473 if (warn_surprising
)
8474 gfc_warning (OPT_Wsurprising
,
8475 "Range specification at %L can never be matched",
8478 cp
->unreachable
= 1;
8479 seen_unreachable
= 1;
8483 /* If the case range can be matched, it can also overlap with
8484 other cases. To make sure it does not, we put it in a
8485 double linked list here. We sort that with a merge sort
8486 later on to detect any overlapping cases. */
8490 head
->right
= head
->left
= NULL
;
8495 tail
->right
->left
= tail
;
8502 /* It there was a failure in the previous case label, give up
8503 for this case label list. Continue with the next block. */
8507 /* See if any case labels that are unreachable have been seen.
8508 If so, we eliminate them. This is a bit of a kludge because
8509 the case lists for a single case statement (label) is a
8510 single forward linked lists. */
8511 if (seen_unreachable
)
8513 /* Advance until the first case in the list is reachable. */
8514 while (body
->ext
.block
.case_list
!= NULL
8515 && body
->ext
.block
.case_list
->unreachable
)
8517 gfc_case
*n
= body
->ext
.block
.case_list
;
8518 body
->ext
.block
.case_list
= body
->ext
.block
.case_list
->next
;
8520 gfc_free_case_list (n
);
8523 /* Strip all other unreachable cases. */
8524 if (body
->ext
.block
.case_list
)
8526 for (cp
= body
->ext
.block
.case_list
; cp
&& cp
->next
; cp
= cp
->next
)
8528 if (cp
->next
->unreachable
)
8530 gfc_case
*n
= cp
->next
;
8531 cp
->next
= cp
->next
->next
;
8533 gfc_free_case_list (n
);
8540 /* See if there were overlapping cases. If the check returns NULL,
8541 there was overlap. In that case we don't do anything. If head
8542 is non-NULL, we prepend the DEFAULT case. The sorted list can
8543 then used during code generation for SELECT CASE constructs with
8544 a case expression of a CHARACTER type. */
8547 head
= check_case_overlap (head
);
8549 /* Prepend the default_case if it is there. */
8550 if (head
!= NULL
&& default_case
)
8552 default_case
->left
= NULL
;
8553 default_case
->right
= head
;
8554 head
->left
= default_case
;
8558 /* Eliminate dead blocks that may be the result if we've seen
8559 unreachable case labels for a block. */
8560 for (body
= code
; body
&& body
->block
; body
= body
->block
)
8562 if (body
->block
->ext
.block
.case_list
== NULL
)
8564 /* Cut the unreachable block from the code chain. */
8565 gfc_code
*c
= body
->block
;
8566 body
->block
= c
->block
;
8568 /* Kill the dead block, but not the blocks below it. */
8570 gfc_free_statements (c
);
8574 /* More than two cases is legal but insane for logical selects.
8575 Issue a warning for it. */
8576 if (warn_surprising
&& type
== BT_LOGICAL
&& ncases
> 2)
8577 gfc_warning (OPT_Wsurprising
,
8578 "Logical SELECT CASE block at %L has more that two cases",
8583 /* Check if a derived type is extensible. */
8586 gfc_type_is_extensible (gfc_symbol
*sym
)
8588 return !(sym
->attr
.is_bind_c
|| sym
->attr
.sequence
8589 || (sym
->attr
.is_class
8590 && sym
->components
->ts
.u
.derived
->attr
.unlimited_polymorphic
));
8595 resolve_types (gfc_namespace
*ns
);
8597 /* Resolve an associate-name: Resolve target and ensure the type-spec is
8598 correct as well as possibly the array-spec. */
8601 resolve_assoc_var (gfc_symbol
* sym
, bool resolve_target
)
8605 gcc_assert (sym
->assoc
);
8606 gcc_assert (sym
->attr
.flavor
== FL_VARIABLE
);
8608 /* If this is for SELECT TYPE, the target may not yet be set. In that
8609 case, return. Resolution will be called later manually again when
8611 target
= sym
->assoc
->target
;
8614 gcc_assert (!sym
->assoc
->dangling
);
8616 if (resolve_target
&& !gfc_resolve_expr (target
))
8619 /* For variable targets, we get some attributes from the target. */
8620 if (target
->expr_type
== EXPR_VARIABLE
)
8624 gcc_assert (target
->symtree
);
8625 tsym
= target
->symtree
->n
.sym
;
8627 sym
->attr
.asynchronous
= tsym
->attr
.asynchronous
;
8628 sym
->attr
.volatile_
= tsym
->attr
.volatile_
;
8630 sym
->attr
.target
= tsym
->attr
.target
8631 || gfc_expr_attr (target
).pointer
;
8632 if (is_subref_array (target
))
8633 sym
->attr
.subref_array_pointer
= 1;
8636 if (target
->expr_type
== EXPR_NULL
)
8638 gfc_error ("Selector at %L cannot be NULL()", &target
->where
);
8641 else if (target
->ts
.type
== BT_UNKNOWN
)
8643 gfc_error ("Selector at %L has no type", &target
->where
);
8647 /* Get type if this was not already set. Note that it can be
8648 some other type than the target in case this is a SELECT TYPE
8649 selector! So we must not update when the type is already there. */
8650 if (sym
->ts
.type
== BT_UNKNOWN
)
8651 sym
->ts
= target
->ts
;
8653 gcc_assert (sym
->ts
.type
!= BT_UNKNOWN
);
8655 /* See if this is a valid association-to-variable. */
8656 sym
->assoc
->variable
= (target
->expr_type
== EXPR_VARIABLE
8657 && !gfc_has_vector_subscript (target
));
8659 /* Finally resolve if this is an array or not. */
8660 if (sym
->attr
.dimension
&& target
->rank
== 0)
8662 /* primary.c makes the assumption that a reference to an associate
8663 name followed by a left parenthesis is an array reference. */
8664 if (sym
->ts
.type
!= BT_CHARACTER
)
8665 gfc_error ("Associate-name %qs at %L is used as array",
8666 sym
->name
, &sym
->declared_at
);
8667 sym
->attr
.dimension
= 0;
8672 /* We cannot deal with class selectors that need temporaries. */
8673 if (target
->ts
.type
== BT_CLASS
8674 && gfc_ref_needs_temporary_p (target
->ref
))
8676 gfc_error ("CLASS selector at %L needs a temporary which is not "
8677 "yet implemented", &target
->where
);
8681 if (target
->ts
.type
== BT_CLASS
)
8682 gfc_fix_class_refs (target
);
8684 if (target
->rank
!= 0)
8687 /* The rank may be incorrectly guessed at parsing, therefore make sure
8688 it is corrected now. */
8689 if (sym
->ts
.type
!= BT_CLASS
&& (!sym
->as
|| sym
->assoc
->rankguessed
))
8692 sym
->as
= gfc_get_array_spec ();
8694 as
->rank
= target
->rank
;
8695 as
->type
= AS_DEFERRED
;
8696 as
->corank
= gfc_get_corank (target
);
8697 sym
->attr
.dimension
= 1;
8698 if (as
->corank
!= 0)
8699 sym
->attr
.codimension
= 1;
8701 else if (sym
->ts
.type
== BT_CLASS
&& (!CLASS_DATA (sym
)->as
|| sym
->assoc
->rankguessed
))
8703 if (!CLASS_DATA (sym
)->as
)
8704 CLASS_DATA (sym
)->as
= gfc_get_array_spec ();
8705 as
= CLASS_DATA (sym
)->as
;
8706 as
->rank
= target
->rank
;
8707 as
->type
= AS_DEFERRED
;
8708 as
->corank
= gfc_get_corank (target
);
8709 CLASS_DATA (sym
)->attr
.dimension
= 1;
8710 if (as
->corank
!= 0)
8711 CLASS_DATA (sym
)->attr
.codimension
= 1;
8716 /* target's rank is 0, but the type of the sym is still array valued,
8717 which has to be corrected. */
8718 if (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
)->as
)
8721 symbol_attribute attr
;
8722 /* The associated variable's type is still the array type
8723 correct this now. */
8724 gfc_typespec
*ts
= &target
->ts
;
8727 for (ref
= target
->ref
; ref
!= NULL
; ref
= ref
->next
)
8732 ts
= &ref
->u
.c
.component
->ts
;
8735 if (ts
->type
== BT_CLASS
)
8736 ts
= &ts
->u
.derived
->components
->ts
;
8742 /* Create a scalar instance of the current class type. Because the
8743 rank of a class array goes into its name, the type has to be
8744 rebuild. The alternative of (re-)setting just the attributes
8745 and as in the current type, destroys the type also in other
8749 sym
->ts
.type
= BT_CLASS
;
8750 attr
= CLASS_DATA (sym
)->attr
;
8752 attr
.associate_var
= 1;
8753 attr
.dimension
= attr
.codimension
= 0;
8754 attr
.class_pointer
= 1;
8755 if (!gfc_build_class_symbol (&sym
->ts
, &attr
, &as
))
8757 /* Make sure the _vptr is set. */
8758 c
= gfc_find_component (sym
->ts
.u
.derived
, "_vptr", true, true, NULL
);
8759 if (c
->ts
.u
.derived
== NULL
)
8760 c
->ts
.u
.derived
= gfc_find_derived_vtab (sym
->ts
.u
.derived
);
8761 CLASS_DATA (sym
)->attr
.pointer
= 1;
8762 CLASS_DATA (sym
)->attr
.class_pointer
= 1;
8763 gfc_set_sym_referenced (sym
->ts
.u
.derived
);
8764 gfc_commit_symbol (sym
->ts
.u
.derived
);
8765 /* _vptr now has the _vtab in it, change it to the _vtype. */
8766 if (c
->ts
.u
.derived
->attr
.vtab
)
8767 c
->ts
.u
.derived
= c
->ts
.u
.derived
->ts
.u
.derived
;
8768 c
->ts
.u
.derived
->ns
->types_resolved
= 0;
8769 resolve_types (c
->ts
.u
.derived
->ns
);
8773 /* Mark this as an associate variable. */
8774 sym
->attr
.associate_var
= 1;
8776 /* Fix up the type-spec for CHARACTER types. */
8777 if (sym
->ts
.type
== BT_CHARACTER
&& !sym
->attr
.select_type_temporary
)
8780 sym
->ts
.u
.cl
= target
->ts
.u
.cl
;
8782 if (sym
->ts
.deferred
&& target
->expr_type
== EXPR_VARIABLE
8783 && target
->symtree
->n
.sym
->attr
.dummy
8784 && sym
->ts
.u
.cl
== target
->ts
.u
.cl
)
8786 sym
->ts
.u
.cl
= gfc_new_charlen (sym
->ns
, NULL
);
8787 sym
->ts
.deferred
= 1;
8790 if (!sym
->ts
.u
.cl
->length
8791 && !sym
->ts
.deferred
8792 && target
->expr_type
== EXPR_CONSTANT
)
8794 sym
->ts
.u
.cl
->length
=
8795 gfc_get_int_expr (gfc_charlen_int_kind
, NULL
,
8796 target
->value
.character
.length
);
8798 else if ((!sym
->ts
.u
.cl
->length
8799 || sym
->ts
.u
.cl
->length
->expr_type
!= EXPR_CONSTANT
)
8800 && target
->expr_type
!= EXPR_VARIABLE
)
8802 sym
->ts
.u
.cl
= gfc_new_charlen (sym
->ns
, NULL
);
8803 sym
->ts
.deferred
= 1;
8805 /* This is reset in trans-stmt.c after the assignment
8806 of the target expression to the associate name. */
8807 sym
->attr
.allocatable
= 1;
8811 /* If the target is a good class object, so is the associate variable. */
8812 if (sym
->ts
.type
== BT_CLASS
&& gfc_expr_attr (target
).class_ok
)
8813 sym
->attr
.class_ok
= 1;
8817 /* Ensure that SELECT TYPE expressions have the correct rank and a full
8818 array reference, where necessary. The symbols are artificial and so
8819 the dimension attribute and arrayspec can also be set. In addition,
8820 sometimes the expr1 arrives as BT_DERIVED, when the symbol is BT_CLASS.
8821 This is corrected here as well.*/
8824 fixup_array_ref (gfc_expr
**expr1
, gfc_expr
*expr2
,
8825 int rank
, gfc_ref
*ref
)
8827 gfc_ref
*nref
= (*expr1
)->ref
;
8828 gfc_symbol
*sym1
= (*expr1
)->symtree
->n
.sym
;
8829 gfc_symbol
*sym2
= expr2
? expr2
->symtree
->n
.sym
: NULL
;
8830 (*expr1
)->rank
= rank
;
8831 if (sym1
->ts
.type
== BT_CLASS
)
8833 if ((*expr1
)->ts
.type
!= BT_CLASS
)
8834 (*expr1
)->ts
= sym1
->ts
;
8836 CLASS_DATA (sym1
)->attr
.dimension
= 1;
8837 if (CLASS_DATA (sym1
)->as
== NULL
&& sym2
)
8838 CLASS_DATA (sym1
)->as
8839 = gfc_copy_array_spec (CLASS_DATA (sym2
)->as
);
8843 sym1
->attr
.dimension
= 1;
8844 if (sym1
->as
== NULL
&& sym2
)
8845 sym1
->as
= gfc_copy_array_spec (sym2
->as
);
8848 for (; nref
; nref
= nref
->next
)
8849 if (nref
->next
== NULL
)
8852 if (ref
&& nref
&& nref
->type
!= REF_ARRAY
)
8853 nref
->next
= gfc_copy_ref (ref
);
8854 else if (ref
&& !nref
)
8855 (*expr1
)->ref
= gfc_copy_ref (ref
);
8860 build_loc_call (gfc_expr
*sym_expr
)
8863 loc_call
= gfc_get_expr ();
8864 loc_call
->expr_type
= EXPR_FUNCTION
;
8865 gfc_get_sym_tree ("_loc", gfc_current_ns
, &loc_call
->symtree
, false);
8866 loc_call
->symtree
->n
.sym
->attr
.flavor
= FL_PROCEDURE
;
8867 loc_call
->symtree
->n
.sym
->attr
.intrinsic
= 1;
8868 loc_call
->symtree
->n
.sym
->result
= loc_call
->symtree
->n
.sym
;
8869 gfc_commit_symbol (loc_call
->symtree
->n
.sym
);
8870 loc_call
->ts
.type
= BT_INTEGER
;
8871 loc_call
->ts
.kind
= gfc_index_integer_kind
;
8872 loc_call
->value
.function
.isym
= gfc_intrinsic_function_by_id (GFC_ISYM_LOC
);
8873 loc_call
->value
.function
.actual
= gfc_get_actual_arglist ();
8874 loc_call
->value
.function
.actual
->expr
= sym_expr
;
8875 loc_call
->where
= sym_expr
->where
;
8879 /* Resolve a SELECT TYPE statement. */
8882 resolve_select_type (gfc_code
*code
, gfc_namespace
*old_ns
)
8884 gfc_symbol
*selector_type
;
8885 gfc_code
*body
, *new_st
, *if_st
, *tail
;
8886 gfc_code
*class_is
= NULL
, *default_case
= NULL
;
8889 char name
[GFC_MAX_SYMBOL_LEN
];
8893 gfc_ref
* ref
= NULL
;
8894 gfc_expr
*selector_expr
= NULL
;
8896 ns
= code
->ext
.block
.ns
;
8899 /* Check for F03:C813. */
8900 if (code
->expr1
->ts
.type
!= BT_CLASS
8901 && !(code
->expr2
&& code
->expr2
->ts
.type
== BT_CLASS
))
8903 gfc_error ("Selector shall be polymorphic in SELECT TYPE statement "
8904 "at %L", &code
->loc
);
8908 if (!code
->expr1
->symtree
->n
.sym
->attr
.class_ok
)
8913 gfc_ref
*ref2
= NULL
;
8914 for (ref
= code
->expr2
->ref
; ref
!= NULL
; ref
= ref
->next
)
8915 if (ref
->type
== REF_COMPONENT
8916 && ref
->u
.c
.component
->ts
.type
== BT_CLASS
)
8921 if (code
->expr1
->symtree
->n
.sym
->attr
.untyped
)
8922 code
->expr1
->symtree
->n
.sym
->ts
= ref2
->u
.c
.component
->ts
;
8923 selector_type
= CLASS_DATA (ref2
->u
.c
.component
)->ts
.u
.derived
;
8927 if (code
->expr1
->symtree
->n
.sym
->attr
.untyped
)
8928 code
->expr1
->symtree
->n
.sym
->ts
= code
->expr2
->ts
;
8929 selector_type
= CLASS_DATA (code
->expr2
)->ts
.u
.derived
;
8932 if (code
->expr2
->rank
&& CLASS_DATA (code
->expr1
)->as
)
8933 CLASS_DATA (code
->expr1
)->as
->rank
= code
->expr2
->rank
;
8935 /* F2008: C803 The selector expression must not be coindexed. */
8936 if (gfc_is_coindexed (code
->expr2
))
8938 gfc_error ("Selector at %L must not be coindexed",
8939 &code
->expr2
->where
);
8946 selector_type
= CLASS_DATA (code
->expr1
)->ts
.u
.derived
;
8948 if (gfc_is_coindexed (code
->expr1
))
8950 gfc_error ("Selector at %L must not be coindexed",
8951 &code
->expr1
->where
);
8956 /* Loop over TYPE IS / CLASS IS cases. */
8957 for (body
= code
->block
; body
; body
= body
->block
)
8959 c
= body
->ext
.block
.case_list
;
8963 /* Check for repeated cases. */
8964 for (tail
= code
->block
; tail
; tail
= tail
->block
)
8966 gfc_case
*d
= tail
->ext
.block
.case_list
;
8970 if (c
->ts
.type
== d
->ts
.type
8971 && ((c
->ts
.type
== BT_DERIVED
8972 && c
->ts
.u
.derived
&& d
->ts
.u
.derived
8973 && !strcmp (c
->ts
.u
.derived
->name
,
8974 d
->ts
.u
.derived
->name
))
8975 || c
->ts
.type
== BT_UNKNOWN
8976 || (!(c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
8977 && c
->ts
.kind
== d
->ts
.kind
)))
8979 gfc_error ("TYPE IS at %L overlaps with TYPE IS at %L",
8980 &c
->where
, &d
->where
);
8986 /* Check F03:C815. */
8987 if ((c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
8988 && !selector_type
->attr
.unlimited_polymorphic
8989 && !gfc_type_is_extensible (c
->ts
.u
.derived
))
8991 gfc_error ("Derived type %qs at %L must be extensible",
8992 c
->ts
.u
.derived
->name
, &c
->where
);
8997 /* Check F03:C816. */
8998 if (c
->ts
.type
!= BT_UNKNOWN
&& !selector_type
->attr
.unlimited_polymorphic
8999 && ((c
->ts
.type
!= BT_DERIVED
&& c
->ts
.type
!= BT_CLASS
)
9000 || !gfc_type_is_extension_of (selector_type
, c
->ts
.u
.derived
)))
9002 if (c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
9003 gfc_error ("Derived type %qs at %L must be an extension of %qs",
9004 c
->ts
.u
.derived
->name
, &c
->where
, selector_type
->name
);
9006 gfc_error ("Unexpected intrinsic type %qs at %L",
9007 gfc_basic_typename (c
->ts
.type
), &c
->where
);
9012 /* Check F03:C814. */
9013 if (c
->ts
.type
== BT_CHARACTER
9014 && (c
->ts
.u
.cl
->length
!= NULL
|| c
->ts
.deferred
))
9016 gfc_error ("The type-spec at %L shall specify that each length "
9017 "type parameter is assumed", &c
->where
);
9022 /* Intercept the DEFAULT case. */
9023 if (c
->ts
.type
== BT_UNKNOWN
)
9025 /* Check F03:C818. */
9028 gfc_error ("The DEFAULT CASE at %L cannot be followed "
9029 "by a second DEFAULT CASE at %L",
9030 &default_case
->ext
.block
.case_list
->where
, &c
->where
);
9035 default_case
= body
;
9042 /* Transform SELECT TYPE statement to BLOCK and associate selector to
9043 target if present. If there are any EXIT statements referring to the
9044 SELECT TYPE construct, this is no problem because the gfc_code
9045 reference stays the same and EXIT is equally possible from the BLOCK
9046 it is changed to. */
9047 code
->op
= EXEC_BLOCK
;
9050 gfc_association_list
* assoc
;
9052 assoc
= gfc_get_association_list ();
9053 assoc
->st
= code
->expr1
->symtree
;
9054 assoc
->target
= gfc_copy_expr (code
->expr2
);
9055 assoc
->target
->where
= code
->expr2
->where
;
9056 /* assoc->variable will be set by resolve_assoc_var. */
9058 code
->ext
.block
.assoc
= assoc
;
9059 code
->expr1
->symtree
->n
.sym
->assoc
= assoc
;
9061 resolve_assoc_var (code
->expr1
->symtree
->n
.sym
, false);
9064 code
->ext
.block
.assoc
= NULL
;
9066 /* Ensure that the selector rank and arrayspec are available to
9067 correct expressions in which they might be missing. */
9068 if (code
->expr2
&& code
->expr2
->rank
)
9070 rank
= code
->expr2
->rank
;
9071 for (ref
= code
->expr2
->ref
; ref
; ref
= ref
->next
)
9072 if (ref
->next
== NULL
)
9074 if (ref
&& ref
->type
== REF_ARRAY
)
9075 ref
= gfc_copy_ref (ref
);
9077 /* Fixup expr1 if necessary. */
9079 fixup_array_ref (&code
->expr1
, code
->expr2
, rank
, ref
);
9081 else if (code
->expr1
->rank
)
9083 rank
= code
->expr1
->rank
;
9084 for (ref
= code
->expr1
->ref
; ref
; ref
= ref
->next
)
9085 if (ref
->next
== NULL
)
9087 if (ref
&& ref
->type
== REF_ARRAY
)
9088 ref
= gfc_copy_ref (ref
);
9091 /* Add EXEC_SELECT to switch on type. */
9092 new_st
= gfc_get_code (code
->op
);
9093 new_st
->expr1
= code
->expr1
;
9094 new_st
->expr2
= code
->expr2
;
9095 new_st
->block
= code
->block
;
9096 code
->expr1
= code
->expr2
= NULL
;
9101 ns
->code
->next
= new_st
;
9103 code
->op
= EXEC_SELECT_TYPE
;
9105 /* Use the intrinsic LOC function to generate an integer expression
9106 for the vtable of the selector. Note that the rank of the selector
9107 expression has to be set to zero. */
9108 gfc_add_vptr_component (code
->expr1
);
9109 code
->expr1
->rank
= 0;
9110 code
->expr1
= build_loc_call (code
->expr1
);
9111 selector_expr
= code
->expr1
->value
.function
.actual
->expr
;
9113 /* Loop over TYPE IS / CLASS IS cases. */
9114 for (body
= code
->block
; body
; body
= body
->block
)
9118 c
= body
->ext
.block
.case_list
;
9120 /* Generate an index integer expression for address of the
9121 TYPE/CLASS vtable and store it in c->low. The hash expression
9122 is stored in c->high and is used to resolve intrinsic cases. */
9123 if (c
->ts
.type
!= BT_UNKNOWN
)
9125 if (c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
9127 vtab
= gfc_find_derived_vtab (c
->ts
.u
.derived
);
9129 c
->high
= gfc_get_int_expr (gfc_integer_4_kind
, NULL
,
9130 c
->ts
.u
.derived
->hash_value
);
9134 vtab
= gfc_find_vtab (&c
->ts
);
9135 gcc_assert (vtab
&& CLASS_DATA (vtab
)->initializer
);
9136 e
= CLASS_DATA (vtab
)->initializer
;
9137 c
->high
= gfc_copy_expr (e
);
9138 if (c
->high
->ts
.kind
!= gfc_integer_4_kind
)
9141 ts
.kind
= gfc_integer_4_kind
;
9142 ts
.type
= BT_INTEGER
;
9143 gfc_convert_type_warn (c
->high
, &ts
, 2, 0);
9147 e
= gfc_lval_expr_from_sym (vtab
);
9148 c
->low
= build_loc_call (e
);
9153 /* Associate temporary to selector. This should only be done
9154 when this case is actually true, so build a new ASSOCIATE
9155 that does precisely this here (instead of using the
9158 if (c
->ts
.type
== BT_CLASS
)
9159 sprintf (name
, "__tmp_class_%s", c
->ts
.u
.derived
->name
);
9160 else if (c
->ts
.type
== BT_DERIVED
)
9161 sprintf (name
, "__tmp_type_%s", c
->ts
.u
.derived
->name
);
9162 else if (c
->ts
.type
== BT_CHARACTER
)
9164 HOST_WIDE_INT charlen
= 0;
9165 if (c
->ts
.u
.cl
&& c
->ts
.u
.cl
->length
9166 && c
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
)
9167 charlen
= gfc_mpz_get_hwi (c
->ts
.u
.cl
->length
->value
.integer
);
9168 snprintf (name
, sizeof (name
),
9169 "__tmp_%s_" HOST_WIDE_INT_PRINT_DEC
"_%d",
9170 gfc_basic_typename (c
->ts
.type
), charlen
, c
->ts
.kind
);
9173 sprintf (name
, "__tmp_%s_%d", gfc_basic_typename (c
->ts
.type
),
9176 st
= gfc_find_symtree (ns
->sym_root
, name
);
9177 gcc_assert (st
->n
.sym
->assoc
);
9178 st
->n
.sym
->assoc
->target
= gfc_get_variable_expr (selector_expr
->symtree
);
9179 st
->n
.sym
->assoc
->target
->where
= selector_expr
->where
;
9180 if (c
->ts
.type
!= BT_CLASS
&& c
->ts
.type
!= BT_UNKNOWN
)
9182 gfc_add_data_component (st
->n
.sym
->assoc
->target
);
9183 /* Fixup the target expression if necessary. */
9185 fixup_array_ref (&st
->n
.sym
->assoc
->target
, NULL
, rank
, ref
);
9188 new_st
= gfc_get_code (EXEC_BLOCK
);
9189 new_st
->ext
.block
.ns
= gfc_build_block_ns (ns
);
9190 new_st
->ext
.block
.ns
->code
= body
->next
;
9191 body
->next
= new_st
;
9193 /* Chain in the new list only if it is marked as dangling. Otherwise
9194 there is a CASE label overlap and this is already used. Just ignore,
9195 the error is diagnosed elsewhere. */
9196 if (st
->n
.sym
->assoc
->dangling
)
9198 new_st
->ext
.block
.assoc
= st
->n
.sym
->assoc
;
9199 st
->n
.sym
->assoc
->dangling
= 0;
9202 resolve_assoc_var (st
->n
.sym
, false);
9205 /* Take out CLASS IS cases for separate treatment. */
9207 while (body
&& body
->block
)
9209 if (body
->block
->ext
.block
.case_list
->ts
.type
== BT_CLASS
)
9211 /* Add to class_is list. */
9212 if (class_is
== NULL
)
9214 class_is
= body
->block
;
9219 for (tail
= class_is
; tail
->block
; tail
= tail
->block
) ;
9220 tail
->block
= body
->block
;
9223 /* Remove from EXEC_SELECT list. */
9224 body
->block
= body
->block
->block
;
9237 /* Add a default case to hold the CLASS IS cases. */
9238 for (tail
= code
; tail
->block
; tail
= tail
->block
) ;
9239 tail
->block
= gfc_get_code (EXEC_SELECT_TYPE
);
9241 tail
->ext
.block
.case_list
= gfc_get_case ();
9242 tail
->ext
.block
.case_list
->ts
.type
= BT_UNKNOWN
;
9244 default_case
= tail
;
9247 /* More than one CLASS IS block? */
9248 if (class_is
->block
)
9252 /* Sort CLASS IS blocks by extension level. */
9256 for (c1
= &class_is
; (*c1
) && (*c1
)->block
; c1
= &((*c1
)->block
))
9259 /* F03:C817 (check for doubles). */
9260 if ((*c1
)->ext
.block
.case_list
->ts
.u
.derived
->hash_value
9261 == c2
->ext
.block
.case_list
->ts
.u
.derived
->hash_value
)
9263 gfc_error ("Double CLASS IS block in SELECT TYPE "
9265 &c2
->ext
.block
.case_list
->where
);
9268 if ((*c1
)->ext
.block
.case_list
->ts
.u
.derived
->attr
.extension
9269 < c2
->ext
.block
.case_list
->ts
.u
.derived
->attr
.extension
)
9272 (*c1
)->block
= c2
->block
;
9282 /* Generate IF chain. */
9283 if_st
= gfc_get_code (EXEC_IF
);
9285 for (body
= class_is
; body
; body
= body
->block
)
9287 new_st
->block
= gfc_get_code (EXEC_IF
);
9288 new_st
= new_st
->block
;
9289 /* Set up IF condition: Call _gfortran_is_extension_of. */
9290 new_st
->expr1
= gfc_get_expr ();
9291 new_st
->expr1
->expr_type
= EXPR_FUNCTION
;
9292 new_st
->expr1
->ts
.type
= BT_LOGICAL
;
9293 new_st
->expr1
->ts
.kind
= 4;
9294 new_st
->expr1
->value
.function
.name
= gfc_get_string (PREFIX ("is_extension_of"));
9295 new_st
->expr1
->value
.function
.isym
= XCNEW (gfc_intrinsic_sym
);
9296 new_st
->expr1
->value
.function
.isym
->id
= GFC_ISYM_EXTENDS_TYPE_OF
;
9297 /* Set up arguments. */
9298 new_st
->expr1
->value
.function
.actual
= gfc_get_actual_arglist ();
9299 new_st
->expr1
->value
.function
.actual
->expr
= gfc_get_variable_expr (selector_expr
->symtree
);
9300 new_st
->expr1
->value
.function
.actual
->expr
->where
= code
->loc
;
9301 new_st
->expr1
->where
= code
->loc
;
9302 gfc_add_vptr_component (new_st
->expr1
->value
.function
.actual
->expr
);
9303 vtab
= gfc_find_derived_vtab (body
->ext
.block
.case_list
->ts
.u
.derived
);
9304 st
= gfc_find_symtree (vtab
->ns
->sym_root
, vtab
->name
);
9305 new_st
->expr1
->value
.function
.actual
->next
= gfc_get_actual_arglist ();
9306 new_st
->expr1
->value
.function
.actual
->next
->expr
= gfc_get_variable_expr (st
);
9307 new_st
->expr1
->value
.function
.actual
->next
->expr
->where
= code
->loc
;
9308 new_st
->next
= body
->next
;
9310 if (default_case
->next
)
9312 new_st
->block
= gfc_get_code (EXEC_IF
);
9313 new_st
= new_st
->block
;
9314 new_st
->next
= default_case
->next
;
9317 /* Replace CLASS DEFAULT code by the IF chain. */
9318 default_case
->next
= if_st
;
9321 /* Resolve the internal code. This can not be done earlier because
9322 it requires that the sym->assoc of selectors is set already. */
9323 gfc_current_ns
= ns
;
9324 gfc_resolve_blocks (code
->block
, gfc_current_ns
);
9325 gfc_current_ns
= old_ns
;
9332 /* Resolve a transfer statement. This is making sure that:
9333 -- a derived type being transferred has only non-pointer components
9334 -- a derived type being transferred doesn't have private components, unless
9335 it's being transferred from the module where the type was defined
9336 -- we're not trying to transfer a whole assumed size array. */
9339 resolve_transfer (gfc_code
*code
)
9341 gfc_symbol
*sym
, *derived
;
9345 bool formatted
= false;
9346 gfc_dt
*dt
= code
->ext
.dt
;
9347 gfc_symbol
*dtio_sub
= NULL
;
9351 while (exp
!= NULL
&& exp
->expr_type
== EXPR_OP
9352 && exp
->value
.op
.op
== INTRINSIC_PARENTHESES
)
9353 exp
= exp
->value
.op
.op1
;
9355 if (exp
&& exp
->expr_type
== EXPR_NULL
9358 gfc_error ("Invalid context for NULL () intrinsic at %L",
9363 if (exp
== NULL
|| (exp
->expr_type
!= EXPR_VARIABLE
9364 && exp
->expr_type
!= EXPR_FUNCTION
9365 && exp
->expr_type
!= EXPR_STRUCTURE
))
9368 /* If we are reading, the variable will be changed. Note that
9369 code->ext.dt may be NULL if the TRANSFER is related to
9370 an INQUIRE statement -- but in this case, we are not reading, either. */
9371 if (dt
&& dt
->dt_io_kind
->value
.iokind
== M_READ
9372 && !gfc_check_vardef_context (exp
, false, false, false,
9376 const gfc_typespec
*ts
= exp
->expr_type
== EXPR_STRUCTURE
9377 || exp
->expr_type
== EXPR_FUNCTION
9378 ? &exp
->ts
: &exp
->symtree
->n
.sym
->ts
;
9380 /* Go to actual component transferred. */
9381 for (ref
= exp
->ref
; ref
; ref
= ref
->next
)
9382 if (ref
->type
== REF_COMPONENT
)
9383 ts
= &ref
->u
.c
.component
->ts
;
9385 if (dt
&& dt
->dt_io_kind
->value
.iokind
!= M_INQUIRE
9386 && (ts
->type
== BT_DERIVED
|| ts
->type
== BT_CLASS
))
9388 if (ts
->type
== BT_DERIVED
|| ts
->type
== BT_CLASS
)
9389 derived
= ts
->u
.derived
;
9391 derived
= ts
->u
.derived
->components
->ts
.u
.derived
;
9393 /* Determine when to use the formatted DTIO procedure. */
9394 if (dt
&& (dt
->format_expr
|| dt
->format_label
))
9397 write
= dt
->dt_io_kind
->value
.iokind
== M_WRITE
9398 || dt
->dt_io_kind
->value
.iokind
== M_PRINT
;
9399 dtio_sub
= gfc_find_specific_dtio_proc (derived
, write
, formatted
);
9401 if (dtio_sub
!= NULL
&& exp
->expr_type
== EXPR_VARIABLE
)
9404 sym
= exp
->symtree
->n
.sym
->ns
->proc_name
;
9405 /* Check to see if this is a nested DTIO call, with the
9406 dummy as the io-list object. */
9407 if (sym
&& sym
== dtio_sub
&& sym
->formal
9408 && sym
->formal
->sym
== exp
->symtree
->n
.sym
9409 && exp
->ref
== NULL
)
9411 if (!sym
->attr
.recursive
)
9413 gfc_error ("DTIO %s procedure at %L must be recursive",
9414 sym
->name
, &sym
->declared_at
);
9421 if (ts
->type
== BT_CLASS
&& dtio_sub
== NULL
)
9423 gfc_error ("Data transfer element at %L cannot be polymorphic unless "
9424 "it is processed by a defined input/output procedure",
9429 if (ts
->type
== BT_DERIVED
)
9431 /* Check that transferred derived type doesn't contain POINTER
9432 components unless it is processed by a defined input/output
9434 if (ts
->u
.derived
->attr
.pointer_comp
&& dtio_sub
== NULL
)
9436 gfc_error ("Data transfer element at %L cannot have POINTER "
9437 "components unless it is processed by a defined "
9438 "input/output procedure", &code
->loc
);
9443 if (ts
->u
.derived
->attr
.proc_pointer_comp
)
9445 gfc_error ("Data transfer element at %L cannot have "
9446 "procedure pointer components", &code
->loc
);
9450 if (ts
->u
.derived
->attr
.alloc_comp
&& dtio_sub
== NULL
)
9452 gfc_error ("Data transfer element at %L cannot have ALLOCATABLE "
9453 "components unless it is processed by a defined "
9454 "input/output procedure", &code
->loc
);
9458 /* C_PTR and C_FUNPTR have private components which means they can not
9459 be printed. However, if -std=gnu and not -pedantic, allow
9460 the component to be printed to help debugging. */
9461 if (ts
->u
.derived
->ts
.f90_type
== BT_VOID
)
9463 if (!gfc_notify_std (GFC_STD_GNU
, "Data transfer element at %L "
9464 "cannot have PRIVATE components", &code
->loc
))
9467 else if (derived_inaccessible (ts
->u
.derived
) && dtio_sub
== NULL
)
9469 gfc_error ("Data transfer element at %L cannot have "
9470 "PRIVATE components unless it is processed by "
9471 "a defined input/output procedure", &code
->loc
);
9476 if (exp
->expr_type
== EXPR_STRUCTURE
)
9479 sym
= exp
->symtree
->n
.sym
;
9481 if (sym
->as
!= NULL
&& sym
->as
->type
== AS_ASSUMED_SIZE
&& exp
->ref
9482 && exp
->ref
->type
== REF_ARRAY
&& exp
->ref
->u
.ar
.type
== AR_FULL
)
9484 gfc_error ("Data transfer element at %L cannot be a full reference to "
9485 "an assumed-size array", &code
->loc
);
9489 if (async_io_dt
&& exp
->expr_type
== EXPR_VARIABLE
)
9490 exp
->symtree
->n
.sym
->attr
.asynchronous
= 1;
9494 /*********** Toplevel code resolution subroutines ***********/
9496 /* Find the set of labels that are reachable from this block. We also
9497 record the last statement in each block. */
9500 find_reachable_labels (gfc_code
*block
)
9507 cs_base
->reachable_labels
= bitmap_alloc (&labels_obstack
);
9509 /* Collect labels in this block. We don't keep those corresponding
9510 to END {IF|SELECT}, these are checked in resolve_branch by going
9511 up through the code_stack. */
9512 for (c
= block
; c
; c
= c
->next
)
9514 if (c
->here
&& c
->op
!= EXEC_END_NESTED_BLOCK
)
9515 bitmap_set_bit (cs_base
->reachable_labels
, c
->here
->value
);
9518 /* Merge with labels from parent block. */
9521 gcc_assert (cs_base
->prev
->reachable_labels
);
9522 bitmap_ior_into (cs_base
->reachable_labels
,
9523 cs_base
->prev
->reachable_labels
);
9529 resolve_lock_unlock_event (gfc_code
*code
)
9531 if (code
->expr1
->expr_type
== EXPR_FUNCTION
9532 && code
->expr1
->value
.function
.isym
9533 && code
->expr1
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
)
9534 remove_caf_get_intrinsic (code
->expr1
);
9536 if ((code
->op
== EXEC_LOCK
|| code
->op
== EXEC_UNLOCK
)
9537 && (code
->expr1
->ts
.type
!= BT_DERIVED
9538 || code
->expr1
->expr_type
!= EXPR_VARIABLE
9539 || code
->expr1
->ts
.u
.derived
->from_intmod
!= INTMOD_ISO_FORTRAN_ENV
9540 || code
->expr1
->ts
.u
.derived
->intmod_sym_id
!= ISOFORTRAN_LOCK_TYPE
9541 || code
->expr1
->rank
!= 0
9542 || (!gfc_is_coarray (code
->expr1
) &&
9543 !gfc_is_coindexed (code
->expr1
))))
9544 gfc_error ("Lock variable at %L must be a scalar of type LOCK_TYPE",
9545 &code
->expr1
->where
);
9546 else if ((code
->op
== EXEC_EVENT_POST
|| code
->op
== EXEC_EVENT_WAIT
)
9547 && (code
->expr1
->ts
.type
!= BT_DERIVED
9548 || code
->expr1
->expr_type
!= EXPR_VARIABLE
9549 || code
->expr1
->ts
.u
.derived
->from_intmod
9550 != INTMOD_ISO_FORTRAN_ENV
9551 || code
->expr1
->ts
.u
.derived
->intmod_sym_id
9552 != ISOFORTRAN_EVENT_TYPE
9553 || code
->expr1
->rank
!= 0))
9554 gfc_error ("Event variable at %L must be a scalar of type EVENT_TYPE",
9555 &code
->expr1
->where
);
9556 else if (code
->op
== EXEC_EVENT_POST
&& !gfc_is_coarray (code
->expr1
)
9557 && !gfc_is_coindexed (code
->expr1
))
9558 gfc_error ("Event variable argument at %L must be a coarray or coindexed",
9559 &code
->expr1
->where
);
9560 else if (code
->op
== EXEC_EVENT_WAIT
&& !gfc_is_coarray (code
->expr1
))
9561 gfc_error ("Event variable argument at %L must be a coarray but not "
9562 "coindexed", &code
->expr1
->where
);
9566 && (code
->expr2
->ts
.type
!= BT_INTEGER
|| code
->expr2
->rank
!= 0
9567 || code
->expr2
->expr_type
!= EXPR_VARIABLE
))
9568 gfc_error ("STAT= argument at %L must be a scalar INTEGER variable",
9569 &code
->expr2
->where
);
9572 && !gfc_check_vardef_context (code
->expr2
, false, false, false,
9573 _("STAT variable")))
9578 && (code
->expr3
->ts
.type
!= BT_CHARACTER
|| code
->expr3
->rank
!= 0
9579 || code
->expr3
->expr_type
!= EXPR_VARIABLE
))
9580 gfc_error ("ERRMSG= argument at %L must be a scalar CHARACTER variable",
9581 &code
->expr3
->where
);
9584 && !gfc_check_vardef_context (code
->expr3
, false, false, false,
9585 _("ERRMSG variable")))
9588 /* Check for LOCK the ACQUIRED_LOCK. */
9589 if (code
->op
!= EXEC_EVENT_WAIT
&& code
->expr4
9590 && (code
->expr4
->ts
.type
!= BT_LOGICAL
|| code
->expr4
->rank
!= 0
9591 || code
->expr4
->expr_type
!= EXPR_VARIABLE
))
9592 gfc_error ("ACQUIRED_LOCK= argument at %L must be a scalar LOGICAL "
9593 "variable", &code
->expr4
->where
);
9595 if (code
->op
!= EXEC_EVENT_WAIT
&& code
->expr4
9596 && !gfc_check_vardef_context (code
->expr4
, false, false, false,
9597 _("ACQUIRED_LOCK variable")))
9600 /* Check for EVENT WAIT the UNTIL_COUNT. */
9601 if (code
->op
== EXEC_EVENT_WAIT
&& code
->expr4
)
9603 if (!gfc_resolve_expr (code
->expr4
) || code
->expr4
->ts
.type
!= BT_INTEGER
9604 || code
->expr4
->rank
!= 0)
9605 gfc_error ("UNTIL_COUNT= argument at %L must be a scalar INTEGER "
9606 "expression", &code
->expr4
->where
);
9612 resolve_critical (gfc_code
*code
)
9614 gfc_symtree
*symtree
;
9615 gfc_symbol
*lock_type
;
9616 char name
[GFC_MAX_SYMBOL_LEN
];
9617 static int serial
= 0;
9619 if (flag_coarray
!= GFC_FCOARRAY_LIB
)
9622 symtree
= gfc_find_symtree (gfc_current_ns
->sym_root
,
9623 GFC_PREFIX ("lock_type"));
9625 lock_type
= symtree
->n
.sym
;
9628 if (gfc_get_sym_tree (GFC_PREFIX ("lock_type"), gfc_current_ns
, &symtree
,
9631 lock_type
= symtree
->n
.sym
;
9632 lock_type
->attr
.flavor
= FL_DERIVED
;
9633 lock_type
->attr
.zero_comp
= 1;
9634 lock_type
->from_intmod
= INTMOD_ISO_FORTRAN_ENV
;
9635 lock_type
->intmod_sym_id
= ISOFORTRAN_LOCK_TYPE
;
9638 sprintf(name
, GFC_PREFIX ("lock_var") "%d",serial
++);
9639 if (gfc_get_sym_tree (name
, gfc_current_ns
, &symtree
, false) != 0)
9642 code
->resolved_sym
= symtree
->n
.sym
;
9643 symtree
->n
.sym
->attr
.flavor
= FL_VARIABLE
;
9644 symtree
->n
.sym
->attr
.referenced
= 1;
9645 symtree
->n
.sym
->attr
.artificial
= 1;
9646 symtree
->n
.sym
->attr
.codimension
= 1;
9647 symtree
->n
.sym
->ts
.type
= BT_DERIVED
;
9648 symtree
->n
.sym
->ts
.u
.derived
= lock_type
;
9649 symtree
->n
.sym
->as
= gfc_get_array_spec ();
9650 symtree
->n
.sym
->as
->corank
= 1;
9651 symtree
->n
.sym
->as
->type
= AS_EXPLICIT
;
9652 symtree
->n
.sym
->as
->cotype
= AS_EXPLICIT
;
9653 symtree
->n
.sym
->as
->lower
[0] = gfc_get_int_expr (gfc_default_integer_kind
,
9655 gfc_commit_symbols();
9660 resolve_sync (gfc_code
*code
)
9662 /* Check imageset. The * case matches expr1 == NULL. */
9665 if (code
->expr1
->ts
.type
!= BT_INTEGER
|| code
->expr1
->rank
> 1)
9666 gfc_error ("Imageset argument at %L must be a scalar or rank-1 "
9667 "INTEGER expression", &code
->expr1
->where
);
9668 if (code
->expr1
->expr_type
== EXPR_CONSTANT
&& code
->expr1
->rank
== 0
9669 && mpz_cmp_si (code
->expr1
->value
.integer
, 1) < 0)
9670 gfc_error ("Imageset argument at %L must between 1 and num_images()",
9671 &code
->expr1
->where
);
9672 else if (code
->expr1
->expr_type
== EXPR_ARRAY
9673 && gfc_simplify_expr (code
->expr1
, 0))
9675 gfc_constructor
*cons
;
9676 cons
= gfc_constructor_first (code
->expr1
->value
.constructor
);
9677 for (; cons
; cons
= gfc_constructor_next (cons
))
9678 if (cons
->expr
->expr_type
== EXPR_CONSTANT
9679 && mpz_cmp_si (cons
->expr
->value
.integer
, 1) < 0)
9680 gfc_error ("Imageset argument at %L must between 1 and "
9681 "num_images()", &cons
->expr
->where
);
9686 gfc_resolve_expr (code
->expr2
);
9688 && (code
->expr2
->ts
.type
!= BT_INTEGER
|| code
->expr2
->rank
!= 0
9689 || code
->expr2
->expr_type
!= EXPR_VARIABLE
))
9690 gfc_error ("STAT= argument at %L must be a scalar INTEGER variable",
9691 &code
->expr2
->where
);
9694 gfc_resolve_expr (code
->expr3
);
9696 && (code
->expr3
->ts
.type
!= BT_CHARACTER
|| code
->expr3
->rank
!= 0
9697 || code
->expr3
->expr_type
!= EXPR_VARIABLE
))
9698 gfc_error ("ERRMSG= argument at %L must be a scalar CHARACTER variable",
9699 &code
->expr3
->where
);
9703 /* Given a branch to a label, see if the branch is conforming.
9704 The code node describes where the branch is located. */
9707 resolve_branch (gfc_st_label
*label
, gfc_code
*code
)
9714 /* Step one: is this a valid branching target? */
9716 if (label
->defined
== ST_LABEL_UNKNOWN
)
9718 gfc_error ("Label %d referenced at %L is never defined", label
->value
,
9723 if (label
->defined
!= ST_LABEL_TARGET
&& label
->defined
!= ST_LABEL_DO_TARGET
)
9725 gfc_error ("Statement at %L is not a valid branch target statement "
9726 "for the branch statement at %L", &label
->where
, &code
->loc
);
9730 /* Step two: make sure this branch is not a branch to itself ;-) */
9732 if (code
->here
== label
)
9735 "Branch at %L may result in an infinite loop", &code
->loc
);
9739 /* Step three: See if the label is in the same block as the
9740 branching statement. The hard work has been done by setting up
9741 the bitmap reachable_labels. */
9743 if (bitmap_bit_p (cs_base
->reachable_labels
, label
->value
))
9745 /* Check now whether there is a CRITICAL construct; if so, check
9746 whether the label is still visible outside of the CRITICAL block,
9747 which is invalid. */
9748 for (stack
= cs_base
; stack
; stack
= stack
->prev
)
9750 if (stack
->current
->op
== EXEC_CRITICAL
9751 && bitmap_bit_p (stack
->reachable_labels
, label
->value
))
9752 gfc_error ("GOTO statement at %L leaves CRITICAL construct for "
9753 "label at %L", &code
->loc
, &label
->where
);
9754 else if (stack
->current
->op
== EXEC_DO_CONCURRENT
9755 && bitmap_bit_p (stack
->reachable_labels
, label
->value
))
9756 gfc_error ("GOTO statement at %L leaves DO CONCURRENT construct "
9757 "for label at %L", &code
->loc
, &label
->where
);
9763 /* Step four: If we haven't found the label in the bitmap, it may
9764 still be the label of the END of the enclosing block, in which
9765 case we find it by going up the code_stack. */
9767 for (stack
= cs_base
; stack
; stack
= stack
->prev
)
9769 if (stack
->current
->next
&& stack
->current
->next
->here
== label
)
9771 if (stack
->current
->op
== EXEC_CRITICAL
)
9773 /* Note: A label at END CRITICAL does not leave the CRITICAL
9774 construct as END CRITICAL is still part of it. */
9775 gfc_error ("GOTO statement at %L leaves CRITICAL construct for label"
9776 " at %L", &code
->loc
, &label
->where
);
9779 else if (stack
->current
->op
== EXEC_DO_CONCURRENT
)
9781 gfc_error ("GOTO statement at %L leaves DO CONCURRENT construct for "
9782 "label at %L", &code
->loc
, &label
->where
);
9789 gcc_assert (stack
->current
->next
->op
== EXEC_END_NESTED_BLOCK
);
9793 /* The label is not in an enclosing block, so illegal. This was
9794 allowed in Fortran 66, so we allow it as extension. No
9795 further checks are necessary in this case. */
9796 gfc_notify_std (GFC_STD_LEGACY
, "Label at %L is not in the same block "
9797 "as the GOTO statement at %L", &label
->where
,
9803 /* Check whether EXPR1 has the same shape as EXPR2. */
9806 resolve_where_shape (gfc_expr
*expr1
, gfc_expr
*expr2
)
9808 mpz_t shape
[GFC_MAX_DIMENSIONS
];
9809 mpz_t shape2
[GFC_MAX_DIMENSIONS
];
9810 bool result
= false;
9813 /* Compare the rank. */
9814 if (expr1
->rank
!= expr2
->rank
)
9817 /* Compare the size of each dimension. */
9818 for (i
=0; i
<expr1
->rank
; i
++)
9820 if (!gfc_array_dimen_size (expr1
, i
, &shape
[i
]))
9823 if (!gfc_array_dimen_size (expr2
, i
, &shape2
[i
]))
9826 if (mpz_cmp (shape
[i
], shape2
[i
]))
9830 /* When either of the two expression is an assumed size array, we
9831 ignore the comparison of dimension sizes. */
9836 gfc_clear_shape (shape
, i
);
9837 gfc_clear_shape (shape2
, i
);
9842 /* Check whether a WHERE assignment target or a WHERE mask expression
9843 has the same shape as the outmost WHERE mask expression. */
9846 resolve_where (gfc_code
*code
, gfc_expr
*mask
)
9852 cblock
= code
->block
;
9854 /* Store the first WHERE mask-expr of the WHERE statement or construct.
9855 In case of nested WHERE, only the outmost one is stored. */
9856 if (mask
== NULL
) /* outmost WHERE */
9858 else /* inner WHERE */
9865 /* Check if the mask-expr has a consistent shape with the
9866 outmost WHERE mask-expr. */
9867 if (!resolve_where_shape (cblock
->expr1
, e
))
9868 gfc_error ("WHERE mask at %L has inconsistent shape",
9869 &cblock
->expr1
->where
);
9872 /* the assignment statement of a WHERE statement, or the first
9873 statement in where-body-construct of a WHERE construct */
9874 cnext
= cblock
->next
;
9879 /* WHERE assignment statement */
9882 /* Check shape consistent for WHERE assignment target. */
9883 if (e
&& !resolve_where_shape (cnext
->expr1
, e
))
9884 gfc_error ("WHERE assignment target at %L has "
9885 "inconsistent shape", &cnext
->expr1
->where
);
9889 case EXEC_ASSIGN_CALL
:
9890 resolve_call (cnext
);
9891 if (!cnext
->resolved_sym
->attr
.elemental
)
9892 gfc_error("Non-ELEMENTAL user-defined assignment in WHERE at %L",
9893 &cnext
->ext
.actual
->expr
->where
);
9896 /* WHERE or WHERE construct is part of a where-body-construct */
9898 resolve_where (cnext
, e
);
9902 gfc_error ("Unsupported statement inside WHERE at %L",
9905 /* the next statement within the same where-body-construct */
9906 cnext
= cnext
->next
;
9908 /* the next masked-elsewhere-stmt, elsewhere-stmt, or end-where-stmt */
9909 cblock
= cblock
->block
;
9914 /* Resolve assignment in FORALL construct.
9915 NVAR is the number of FORALL index variables, and VAR_EXPR records the
9916 FORALL index variables. */
9919 gfc_resolve_assign_in_forall (gfc_code
*code
, int nvar
, gfc_expr
**var_expr
)
9923 for (n
= 0; n
< nvar
; n
++)
9925 gfc_symbol
*forall_index
;
9927 forall_index
= var_expr
[n
]->symtree
->n
.sym
;
9929 /* Check whether the assignment target is one of the FORALL index
9931 if ((code
->expr1
->expr_type
== EXPR_VARIABLE
)
9932 && (code
->expr1
->symtree
->n
.sym
== forall_index
))
9933 gfc_error ("Assignment to a FORALL index variable at %L",
9934 &code
->expr1
->where
);
9937 /* If one of the FORALL index variables doesn't appear in the
9938 assignment variable, then there could be a many-to-one
9939 assignment. Emit a warning rather than an error because the
9940 mask could be resolving this problem. */
9941 if (!find_forall_index (code
->expr1
, forall_index
, 0))
9942 gfc_warning (0, "The FORALL with index %qs is not used on the "
9943 "left side of the assignment at %L and so might "
9944 "cause multiple assignment to this object",
9945 var_expr
[n
]->symtree
->name
, &code
->expr1
->where
);
9951 /* Resolve WHERE statement in FORALL construct. */
9954 gfc_resolve_where_code_in_forall (gfc_code
*code
, int nvar
,
9955 gfc_expr
**var_expr
)
9960 cblock
= code
->block
;
9963 /* the assignment statement of a WHERE statement, or the first
9964 statement in where-body-construct of a WHERE construct */
9965 cnext
= cblock
->next
;
9970 /* WHERE assignment statement */
9972 gfc_resolve_assign_in_forall (cnext
, nvar
, var_expr
);
9975 /* WHERE operator assignment statement */
9976 case EXEC_ASSIGN_CALL
:
9977 resolve_call (cnext
);
9978 if (!cnext
->resolved_sym
->attr
.elemental
)
9979 gfc_error("Non-ELEMENTAL user-defined assignment in WHERE at %L",
9980 &cnext
->ext
.actual
->expr
->where
);
9983 /* WHERE or WHERE construct is part of a where-body-construct */
9985 gfc_resolve_where_code_in_forall (cnext
, nvar
, var_expr
);
9989 gfc_error ("Unsupported statement inside WHERE at %L",
9992 /* the next statement within the same where-body-construct */
9993 cnext
= cnext
->next
;
9995 /* the next masked-elsewhere-stmt, elsewhere-stmt, or end-where-stmt */
9996 cblock
= cblock
->block
;
10001 /* Traverse the FORALL body to check whether the following errors exist:
10002 1. For assignment, check if a many-to-one assignment happens.
10003 2. For WHERE statement, check the WHERE body to see if there is any
10004 many-to-one assignment. */
10007 gfc_resolve_forall_body (gfc_code
*code
, int nvar
, gfc_expr
**var_expr
)
10011 c
= code
->block
->next
;
10017 case EXEC_POINTER_ASSIGN
:
10018 gfc_resolve_assign_in_forall (c
, nvar
, var_expr
);
10021 case EXEC_ASSIGN_CALL
:
10025 /* Because the gfc_resolve_blocks() will handle the nested FORALL,
10026 there is no need to handle it here. */
10030 gfc_resolve_where_code_in_forall(c
, nvar
, var_expr
);
10035 /* The next statement in the FORALL body. */
10041 /* Counts the number of iterators needed inside a forall construct, including
10042 nested forall constructs. This is used to allocate the needed memory
10043 in gfc_resolve_forall. */
10046 gfc_count_forall_iterators (gfc_code
*code
)
10048 int max_iters
, sub_iters
, current_iters
;
10049 gfc_forall_iterator
*fa
;
10051 gcc_assert(code
->op
== EXEC_FORALL
);
10055 for (fa
= code
->ext
.forall_iterator
; fa
; fa
= fa
->next
)
10058 code
= code
->block
->next
;
10062 if (code
->op
== EXEC_FORALL
)
10064 sub_iters
= gfc_count_forall_iterators (code
);
10065 if (sub_iters
> max_iters
)
10066 max_iters
= sub_iters
;
10071 return current_iters
+ max_iters
;
10075 /* Given a FORALL construct, first resolve the FORALL iterator, then call
10076 gfc_resolve_forall_body to resolve the FORALL body. */
10079 gfc_resolve_forall (gfc_code
*code
, gfc_namespace
*ns
, int forall_save
)
10081 static gfc_expr
**var_expr
;
10082 static int total_var
= 0;
10083 static int nvar
= 0;
10084 int i
, old_nvar
, tmp
;
10085 gfc_forall_iterator
*fa
;
10089 if (!gfc_notify_std (GFC_STD_F2018_OBS
, "FORALL construct at %L", &code
->loc
))
10092 /* Start to resolve a FORALL construct */
10093 if (forall_save
== 0)
10095 /* Count the total number of FORALL indices in the nested FORALL
10096 construct in order to allocate the VAR_EXPR with proper size. */
10097 total_var
= gfc_count_forall_iterators (code
);
10099 /* Allocate VAR_EXPR with NUMBER_OF_FORALL_INDEX elements. */
10100 var_expr
= XCNEWVEC (gfc_expr
*, total_var
);
10103 /* The information about FORALL iterator, including FORALL indices start, end
10104 and stride. An outer FORALL indice cannot appear in start, end or stride. */
10105 for (fa
= code
->ext
.forall_iterator
; fa
; fa
= fa
->next
)
10107 /* Fortran 20008: C738 (R753). */
10108 if (fa
->var
->ref
&& fa
->var
->ref
->type
== REF_ARRAY
)
10110 gfc_error ("FORALL index-name at %L must be a scalar variable "
10111 "of type integer", &fa
->var
->where
);
10115 /* Check if any outer FORALL index name is the same as the current
10117 for (i
= 0; i
< nvar
; i
++)
10119 if (fa
->var
->symtree
->n
.sym
== var_expr
[i
]->symtree
->n
.sym
)
10120 gfc_error ("An outer FORALL construct already has an index "
10121 "with this name %L", &fa
->var
->where
);
10124 /* Record the current FORALL index. */
10125 var_expr
[nvar
] = gfc_copy_expr (fa
->var
);
10129 /* No memory leak. */
10130 gcc_assert (nvar
<= total_var
);
10133 /* Resolve the FORALL body. */
10134 gfc_resolve_forall_body (code
, nvar
, var_expr
);
10136 /* May call gfc_resolve_forall to resolve the inner FORALL loop. */
10137 gfc_resolve_blocks (code
->block
, ns
);
10141 /* Free only the VAR_EXPRs allocated in this frame. */
10142 for (i
= nvar
; i
< tmp
; i
++)
10143 gfc_free_expr (var_expr
[i
]);
10147 /* We are in the outermost FORALL construct. */
10148 gcc_assert (forall_save
== 0);
10150 /* VAR_EXPR is not needed any more. */
10157 /* Resolve a BLOCK construct statement. */
10160 resolve_block_construct (gfc_code
* code
)
10162 /* Resolve the BLOCK's namespace. */
10163 gfc_resolve (code
->ext
.block
.ns
);
10165 /* For an ASSOCIATE block, the associations (and their targets) are already
10166 resolved during resolve_symbol. */
10170 /* Resolve lists of blocks found in IF, SELECT CASE, WHERE, FORALL, GOTO and
10174 gfc_resolve_blocks (gfc_code
*b
, gfc_namespace
*ns
)
10178 for (; b
; b
= b
->block
)
10180 t
= gfc_resolve_expr (b
->expr1
);
10181 if (!gfc_resolve_expr (b
->expr2
))
10187 if (t
&& b
->expr1
!= NULL
10188 && (b
->expr1
->ts
.type
!= BT_LOGICAL
|| b
->expr1
->rank
!= 0))
10189 gfc_error ("IF clause at %L requires a scalar LOGICAL expression",
10195 && b
->expr1
!= NULL
10196 && (b
->expr1
->ts
.type
!= BT_LOGICAL
|| b
->expr1
->rank
== 0))
10197 gfc_error ("WHERE/ELSEWHERE clause at %L requires a LOGICAL array",
10202 resolve_branch (b
->label1
, b
);
10206 resolve_block_construct (b
);
10210 case EXEC_SELECT_TYPE
:
10213 case EXEC_DO_WHILE
:
10214 case EXEC_DO_CONCURRENT
:
10215 case EXEC_CRITICAL
:
10218 case EXEC_IOLENGTH
:
10222 case EXEC_OMP_ATOMIC
:
10223 case EXEC_OACC_ATOMIC
:
10225 gfc_omp_atomic_op aop
10226 = (gfc_omp_atomic_op
) (b
->ext
.omp_atomic
& GFC_OMP_ATOMIC_MASK
);
10228 /* Verify this before calling gfc_resolve_code, which might
10230 gcc_assert (b
->next
&& b
->next
->op
== EXEC_ASSIGN
);
10231 gcc_assert (((aop
!= GFC_OMP_ATOMIC_CAPTURE
)
10232 && b
->next
->next
== NULL
)
10233 || ((aop
== GFC_OMP_ATOMIC_CAPTURE
)
10234 && b
->next
->next
!= NULL
10235 && b
->next
->next
->op
== EXEC_ASSIGN
10236 && b
->next
->next
->next
== NULL
));
10240 case EXEC_OACC_PARALLEL_LOOP
:
10241 case EXEC_OACC_PARALLEL
:
10242 case EXEC_OACC_KERNELS_LOOP
:
10243 case EXEC_OACC_KERNELS
:
10244 case EXEC_OACC_DATA
:
10245 case EXEC_OACC_HOST_DATA
:
10246 case EXEC_OACC_LOOP
:
10247 case EXEC_OACC_UPDATE
:
10248 case EXEC_OACC_WAIT
:
10249 case EXEC_OACC_CACHE
:
10250 case EXEC_OACC_ENTER_DATA
:
10251 case EXEC_OACC_EXIT_DATA
:
10252 case EXEC_OACC_ROUTINE
:
10253 case EXEC_OMP_CRITICAL
:
10254 case EXEC_OMP_DISTRIBUTE
:
10255 case EXEC_OMP_DISTRIBUTE_PARALLEL_DO
:
10256 case EXEC_OMP_DISTRIBUTE_PARALLEL_DO_SIMD
:
10257 case EXEC_OMP_DISTRIBUTE_SIMD
:
10259 case EXEC_OMP_DO_SIMD
:
10260 case EXEC_OMP_MASTER
:
10261 case EXEC_OMP_ORDERED
:
10262 case EXEC_OMP_PARALLEL
:
10263 case EXEC_OMP_PARALLEL_DO
:
10264 case EXEC_OMP_PARALLEL_DO_SIMD
:
10265 case EXEC_OMP_PARALLEL_SECTIONS
:
10266 case EXEC_OMP_PARALLEL_WORKSHARE
:
10267 case EXEC_OMP_SECTIONS
:
10268 case EXEC_OMP_SIMD
:
10269 case EXEC_OMP_SINGLE
:
10270 case EXEC_OMP_TARGET
:
10271 case EXEC_OMP_TARGET_DATA
:
10272 case EXEC_OMP_TARGET_ENTER_DATA
:
10273 case EXEC_OMP_TARGET_EXIT_DATA
:
10274 case EXEC_OMP_TARGET_PARALLEL
:
10275 case EXEC_OMP_TARGET_PARALLEL_DO
:
10276 case EXEC_OMP_TARGET_PARALLEL_DO_SIMD
:
10277 case EXEC_OMP_TARGET_SIMD
:
10278 case EXEC_OMP_TARGET_TEAMS
:
10279 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE
:
10280 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO
:
10281 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
10282 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_SIMD
:
10283 case EXEC_OMP_TARGET_UPDATE
:
10284 case EXEC_OMP_TASK
:
10285 case EXEC_OMP_TASKGROUP
:
10286 case EXEC_OMP_TASKLOOP
:
10287 case EXEC_OMP_TASKLOOP_SIMD
:
10288 case EXEC_OMP_TASKWAIT
:
10289 case EXEC_OMP_TASKYIELD
:
10290 case EXEC_OMP_TEAMS
:
10291 case EXEC_OMP_TEAMS_DISTRIBUTE
:
10292 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO
:
10293 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
10294 case EXEC_OMP_TEAMS_DISTRIBUTE_SIMD
:
10295 case EXEC_OMP_WORKSHARE
:
10299 gfc_internal_error ("gfc_resolve_blocks(): Bad block type");
10302 gfc_resolve_code (b
->next
, ns
);
10307 /* Does everything to resolve an ordinary assignment. Returns true
10308 if this is an interface assignment. */
10310 resolve_ordinary_assign (gfc_code
*code
, gfc_namespace
*ns
)
10317 symbol_attribute attr
;
10319 if (gfc_extend_assign (code
, ns
))
10323 if (code
->op
== EXEC_ASSIGN_CALL
)
10325 lhs
= code
->ext
.actual
->expr
;
10326 rhsptr
= &code
->ext
.actual
->next
->expr
;
10330 gfc_actual_arglist
* args
;
10331 gfc_typebound_proc
* tbp
;
10333 gcc_assert (code
->op
== EXEC_COMPCALL
);
10335 args
= code
->expr1
->value
.compcall
.actual
;
10337 rhsptr
= &args
->next
->expr
;
10339 tbp
= code
->expr1
->value
.compcall
.tbp
;
10340 gcc_assert (!tbp
->is_generic
);
10343 /* Make a temporary rhs when there is a default initializer
10344 and rhs is the same symbol as the lhs. */
10345 if ((*rhsptr
)->expr_type
== EXPR_VARIABLE
10346 && (*rhsptr
)->symtree
->n
.sym
->ts
.type
== BT_DERIVED
10347 && gfc_has_default_initializer ((*rhsptr
)->symtree
->n
.sym
->ts
.u
.derived
)
10348 && (lhs
->symtree
->n
.sym
== (*rhsptr
)->symtree
->n
.sym
))
10349 *rhsptr
= gfc_get_parentheses (*rhsptr
);
10358 && !gfc_notify_std (GFC_STD_GNU
, "BOZ literal at %L outside "
10359 "a DATA statement and outside INT/REAL/DBLE/CMPLX",
10363 /* Handle the case of a BOZ literal on the RHS. */
10364 if (rhs
->is_boz
&& lhs
->ts
.type
!= BT_INTEGER
)
10367 if (warn_surprising
)
10368 gfc_warning (OPT_Wsurprising
,
10369 "BOZ literal at %L is bitwise transferred "
10370 "non-integer symbol %qs", &code
->loc
,
10371 lhs
->symtree
->n
.sym
->name
);
10373 if (!gfc_convert_boz (rhs
, &lhs
->ts
))
10375 if ((rc
= gfc_range_check (rhs
)) != ARITH_OK
)
10377 if (rc
== ARITH_UNDERFLOW
)
10378 gfc_error ("Arithmetic underflow of bit-wise transferred BOZ at %L"
10379 ". This check can be disabled with the option "
10380 "%<-fno-range-check%>", &rhs
->where
);
10381 else if (rc
== ARITH_OVERFLOW
)
10382 gfc_error ("Arithmetic overflow of bit-wise transferred BOZ at %L"
10383 ". This check can be disabled with the option "
10384 "%<-fno-range-check%>", &rhs
->where
);
10385 else if (rc
== ARITH_NAN
)
10386 gfc_error ("Arithmetic NaN of bit-wise transferred BOZ at %L"
10387 ". This check can be disabled with the option "
10388 "%<-fno-range-check%>", &rhs
->where
);
10393 if (lhs
->ts
.type
== BT_CHARACTER
10394 && warn_character_truncation
)
10396 HOST_WIDE_INT llen
= 0, rlen
= 0;
10397 if (lhs
->ts
.u
.cl
!= NULL
10398 && lhs
->ts
.u
.cl
->length
!= NULL
10399 && lhs
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
)
10400 llen
= gfc_mpz_get_hwi (lhs
->ts
.u
.cl
->length
->value
.integer
);
10402 if (rhs
->expr_type
== EXPR_CONSTANT
)
10403 rlen
= rhs
->value
.character
.length
;
10405 else if (rhs
->ts
.u
.cl
!= NULL
10406 && rhs
->ts
.u
.cl
->length
!= NULL
10407 && rhs
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
)
10408 rlen
= gfc_mpz_get_hwi (rhs
->ts
.u
.cl
->length
->value
.integer
);
10410 if (rlen
&& llen
&& rlen
> llen
)
10411 gfc_warning_now (OPT_Wcharacter_truncation
,
10412 "CHARACTER expression will be truncated "
10413 "in assignment (%ld/%ld) at %L",
10414 (long) llen
, (long) rlen
, &code
->loc
);
10417 /* Ensure that a vector index expression for the lvalue is evaluated
10418 to a temporary if the lvalue symbol is referenced in it. */
10421 for (ref
= lhs
->ref
; ref
; ref
= ref
->next
)
10422 if (ref
->type
== REF_ARRAY
)
10424 for (n
= 0; n
< ref
->u
.ar
.dimen
; n
++)
10425 if (ref
->u
.ar
.dimen_type
[n
] == DIMEN_VECTOR
10426 && gfc_find_sym_in_expr (lhs
->symtree
->n
.sym
,
10427 ref
->u
.ar
.start
[n
]))
10429 = gfc_get_parentheses (ref
->u
.ar
.start
[n
]);
10433 if (gfc_pure (NULL
))
10435 if (lhs
->ts
.type
== BT_DERIVED
10436 && lhs
->expr_type
== EXPR_VARIABLE
10437 && lhs
->ts
.u
.derived
->attr
.pointer_comp
10438 && rhs
->expr_type
== EXPR_VARIABLE
10439 && (gfc_impure_variable (rhs
->symtree
->n
.sym
)
10440 || gfc_is_coindexed (rhs
)))
10442 /* F2008, C1283. */
10443 if (gfc_is_coindexed (rhs
))
10444 gfc_error ("Coindexed expression at %L is assigned to "
10445 "a derived type variable with a POINTER "
10446 "component in a PURE procedure",
10449 gfc_error ("The impure variable at %L is assigned to "
10450 "a derived type variable with a POINTER "
10451 "component in a PURE procedure (12.6)",
10456 /* Fortran 2008, C1283. */
10457 if (gfc_is_coindexed (lhs
))
10459 gfc_error ("Assignment to coindexed variable at %L in a PURE "
10460 "procedure", &rhs
->where
);
10465 if (gfc_implicit_pure (NULL
))
10467 if (lhs
->expr_type
== EXPR_VARIABLE
10468 && lhs
->symtree
->n
.sym
!= gfc_current_ns
->proc_name
10469 && lhs
->symtree
->n
.sym
->ns
!= gfc_current_ns
)
10470 gfc_unset_implicit_pure (NULL
);
10472 if (lhs
->ts
.type
== BT_DERIVED
10473 && lhs
->expr_type
== EXPR_VARIABLE
10474 && lhs
->ts
.u
.derived
->attr
.pointer_comp
10475 && rhs
->expr_type
== EXPR_VARIABLE
10476 && (gfc_impure_variable (rhs
->symtree
->n
.sym
)
10477 || gfc_is_coindexed (rhs
)))
10478 gfc_unset_implicit_pure (NULL
);
10480 /* Fortran 2008, C1283. */
10481 if (gfc_is_coindexed (lhs
))
10482 gfc_unset_implicit_pure (NULL
);
10485 /* F2008, 7.2.1.2. */
10486 attr
= gfc_expr_attr (lhs
);
10487 if (lhs
->ts
.type
== BT_CLASS
&& attr
.allocatable
)
10489 if (attr
.codimension
)
10491 gfc_error ("Assignment to polymorphic coarray at %L is not "
10492 "permitted", &lhs
->where
);
10495 if (!gfc_notify_std (GFC_STD_F2008
, "Assignment to an allocatable "
10496 "polymorphic variable at %L", &lhs
->where
))
10498 if (!flag_realloc_lhs
)
10500 gfc_error ("Assignment to an allocatable polymorphic variable at %L "
10501 "requires %<-frealloc-lhs%>", &lhs
->where
);
10505 else if (lhs
->ts
.type
== BT_CLASS
)
10507 gfc_error ("Nonallocatable variable must not be polymorphic in intrinsic "
10508 "assignment at %L - check that there is a matching specific "
10509 "subroutine for '=' operator", &lhs
->where
);
10513 bool lhs_coindexed
= gfc_is_coindexed (lhs
);
10515 /* F2008, Section 7.2.1.2. */
10516 if (lhs_coindexed
&& gfc_has_ultimate_allocatable (lhs
))
10518 gfc_error ("Coindexed variable must not have an allocatable ultimate "
10519 "component in assignment at %L", &lhs
->where
);
10523 /* Assign the 'data' of a class object to a derived type. */
10524 if (lhs
->ts
.type
== BT_DERIVED
10525 && rhs
->ts
.type
== BT_CLASS
10526 && rhs
->expr_type
!= EXPR_ARRAY
)
10527 gfc_add_data_component (rhs
);
10529 /* Make sure there is a vtable and, in particular, a _copy for the
10531 if (UNLIMITED_POLY (lhs
) && lhs
->rank
&& rhs
->ts
.type
!= BT_CLASS
)
10532 gfc_find_vtab (&rhs
->ts
);
10534 bool caf_convert_to_send
= flag_coarray
== GFC_FCOARRAY_LIB
10536 || (code
->expr2
->expr_type
== EXPR_FUNCTION
10537 && code
->expr2
->value
.function
.isym
10538 && code
->expr2
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
10539 && (code
->expr1
->rank
== 0 || code
->expr2
->rank
!= 0)
10540 && !gfc_expr_attr (rhs
).allocatable
10541 && !gfc_has_vector_subscript (rhs
)));
10543 gfc_check_assign (lhs
, rhs
, 1, !caf_convert_to_send
);
10545 /* Insert a GFC_ISYM_CAF_SEND intrinsic, when the LHS is a coindexed variable.
10546 Additionally, insert this code when the RHS is a CAF as we then use the
10547 GFC_ISYM_CAF_SEND intrinsic just to avoid a temporary; but do not do so if
10548 the LHS is (re)allocatable or has a vector subscript. If the LHS is a
10549 noncoindexed array and the RHS is a coindexed scalar, use the normal code
10551 if (caf_convert_to_send
)
10553 if (code
->expr2
->expr_type
== EXPR_FUNCTION
10554 && code
->expr2
->value
.function
.isym
10555 && code
->expr2
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
)
10556 remove_caf_get_intrinsic (code
->expr2
);
10557 code
->op
= EXEC_CALL
;
10558 gfc_get_sym_tree (GFC_PREFIX ("caf_send"), ns
, &code
->symtree
, true);
10559 code
->resolved_sym
= code
->symtree
->n
.sym
;
10560 code
->resolved_sym
->attr
.flavor
= FL_PROCEDURE
;
10561 code
->resolved_sym
->attr
.intrinsic
= 1;
10562 code
->resolved_sym
->attr
.subroutine
= 1;
10563 code
->resolved_isym
= gfc_intrinsic_subroutine_by_id (GFC_ISYM_CAF_SEND
);
10564 gfc_commit_symbol (code
->resolved_sym
);
10565 code
->ext
.actual
= gfc_get_actual_arglist ();
10566 code
->ext
.actual
->expr
= lhs
;
10567 code
->ext
.actual
->next
= gfc_get_actual_arglist ();
10568 code
->ext
.actual
->next
->expr
= rhs
;
10569 code
->expr1
= NULL
;
10570 code
->expr2
= NULL
;
10577 /* Add a component reference onto an expression. */
10580 add_comp_ref (gfc_expr
*e
, gfc_component
*c
)
10585 ref
= &((*ref
)->next
);
10586 *ref
= gfc_get_ref ();
10587 (*ref
)->type
= REF_COMPONENT
;
10588 (*ref
)->u
.c
.sym
= e
->ts
.u
.derived
;
10589 (*ref
)->u
.c
.component
= c
;
10592 /* Add a full array ref, as necessary. */
10595 gfc_add_full_array_ref (e
, c
->as
);
10596 e
->rank
= c
->as
->rank
;
10601 /* Build an assignment. Keep the argument 'op' for future use, so that
10602 pointer assignments can be made. */
10605 build_assignment (gfc_exec_op op
, gfc_expr
*expr1
, gfc_expr
*expr2
,
10606 gfc_component
*comp1
, gfc_component
*comp2
, locus loc
)
10608 gfc_code
*this_code
;
10610 this_code
= gfc_get_code (op
);
10611 this_code
->next
= NULL
;
10612 this_code
->expr1
= gfc_copy_expr (expr1
);
10613 this_code
->expr2
= gfc_copy_expr (expr2
);
10614 this_code
->loc
= loc
;
10615 if (comp1
&& comp2
)
10617 add_comp_ref (this_code
->expr1
, comp1
);
10618 add_comp_ref (this_code
->expr2
, comp2
);
10625 /* Makes a temporary variable expression based on the characteristics of
10626 a given variable expression. */
10629 get_temp_from_expr (gfc_expr
*e
, gfc_namespace
*ns
)
10631 static int serial
= 0;
10632 char name
[GFC_MAX_SYMBOL_LEN
];
10634 gfc_array_spec
*as
;
10635 gfc_array_ref
*aref
;
10638 sprintf (name
, GFC_PREFIX("DA%d"), serial
++);
10639 gfc_get_sym_tree (name
, ns
, &tmp
, false);
10640 gfc_add_type (tmp
->n
.sym
, &e
->ts
, NULL
);
10646 /* Obtain the arrayspec for the temporary. */
10647 if (e
->rank
&& e
->expr_type
!= EXPR_ARRAY
10648 && e
->expr_type
!= EXPR_FUNCTION
10649 && e
->expr_type
!= EXPR_OP
)
10651 aref
= gfc_find_array_ref (e
);
10652 if (e
->expr_type
== EXPR_VARIABLE
10653 && e
->symtree
->n
.sym
->as
== aref
->as
)
10657 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
10658 if (ref
->type
== REF_COMPONENT
10659 && ref
->u
.c
.component
->as
== aref
->as
)
10667 /* Add the attributes and the arrayspec to the temporary. */
10668 tmp
->n
.sym
->attr
= gfc_expr_attr (e
);
10669 tmp
->n
.sym
->attr
.function
= 0;
10670 tmp
->n
.sym
->attr
.result
= 0;
10671 tmp
->n
.sym
->attr
.flavor
= FL_VARIABLE
;
10672 tmp
->n
.sym
->attr
.dummy
= 0;
10673 tmp
->n
.sym
->attr
.intent
= INTENT_UNKNOWN
;
10677 tmp
->n
.sym
->as
= gfc_copy_array_spec (as
);
10680 if (as
->type
== AS_DEFERRED
)
10681 tmp
->n
.sym
->attr
.allocatable
= 1;
10683 else if (e
->rank
&& (e
->expr_type
== EXPR_ARRAY
10684 || e
->expr_type
== EXPR_FUNCTION
10685 || e
->expr_type
== EXPR_OP
))
10687 tmp
->n
.sym
->as
= gfc_get_array_spec ();
10688 tmp
->n
.sym
->as
->type
= AS_DEFERRED
;
10689 tmp
->n
.sym
->as
->rank
= e
->rank
;
10690 tmp
->n
.sym
->attr
.allocatable
= 1;
10691 tmp
->n
.sym
->attr
.dimension
= 1;
10694 tmp
->n
.sym
->attr
.dimension
= 0;
10696 gfc_set_sym_referenced (tmp
->n
.sym
);
10697 gfc_commit_symbol (tmp
->n
.sym
);
10698 e
= gfc_lval_expr_from_sym (tmp
->n
.sym
);
10700 /* Should the lhs be a section, use its array ref for the
10701 temporary expression. */
10702 if (aref
&& aref
->type
!= AR_FULL
)
10704 gfc_free_ref_list (e
->ref
);
10705 e
->ref
= gfc_copy_ref (ref
);
10711 /* Add one line of code to the code chain, making sure that 'head' and
10712 'tail' are appropriately updated. */
10715 add_code_to_chain (gfc_code
**this_code
, gfc_code
**head
, gfc_code
**tail
)
10717 gcc_assert (this_code
);
10719 *head
= *tail
= *this_code
;
10721 *tail
= gfc_append_code (*tail
, *this_code
);
10726 /* Counts the potential number of part array references that would
10727 result from resolution of typebound defined assignments. */
10730 nonscalar_typebound_assign (gfc_symbol
*derived
, int depth
)
10733 int c_depth
= 0, t_depth
;
10735 for (c
= derived
->components
; c
; c
= c
->next
)
10737 if ((!gfc_bt_struct (c
->ts
.type
)
10739 || c
->attr
.allocatable
10740 || c
->attr
.proc_pointer_comp
10741 || c
->attr
.class_pointer
10742 || c
->attr
.proc_pointer
)
10743 && !c
->attr
.defined_assign_comp
)
10746 if (c
->as
&& c_depth
== 0)
10749 if (c
->ts
.u
.derived
->attr
.defined_assign_comp
)
10750 t_depth
= nonscalar_typebound_assign (c
->ts
.u
.derived
,
10755 c_depth
= t_depth
> c_depth
? t_depth
: c_depth
;
10757 return depth
+ c_depth
;
10761 /* Implement 7.2.1.3 of the F08 standard:
10762 "An intrinsic assignment where the variable is of derived type is
10763 performed as if each component of the variable were assigned from the
10764 corresponding component of expr using pointer assignment (7.2.2) for
10765 each pointer component, defined assignment for each nonpointer
10766 nonallocatable component of a type that has a type-bound defined
10767 assignment consistent with the component, intrinsic assignment for
10768 each other nonpointer nonallocatable component, ..."
10770 The pointer assignments are taken care of by the intrinsic
10771 assignment of the structure itself. This function recursively adds
10772 defined assignments where required. The recursion is accomplished
10773 by calling gfc_resolve_code.
10775 When the lhs in a defined assignment has intent INOUT, we need a
10776 temporary for the lhs. In pseudo-code:
10778 ! Only call function lhs once.
10779 if (lhs is not a constant or an variable)
10782 ! Do the intrinsic assignment
10784 ! Now do the defined assignments
10785 do over components with typebound defined assignment [%cmp]
10786 #if one component's assignment procedure is INOUT
10788 #if expr2 non-variable
10794 t1%cmp {defined=} expr2%cmp
10800 expr1%cmp {defined=} expr2%cmp
10804 /* The temporary assignments have to be put on top of the additional
10805 code to avoid the result being changed by the intrinsic assignment.
10807 static int component_assignment_level
= 0;
10808 static gfc_code
*tmp_head
= NULL
, *tmp_tail
= NULL
;
10811 generate_component_assignments (gfc_code
**code
, gfc_namespace
*ns
)
10813 gfc_component
*comp1
, *comp2
;
10814 gfc_code
*this_code
= NULL
, *head
= NULL
, *tail
= NULL
;
10816 int error_count
, depth
;
10818 gfc_get_errors (NULL
, &error_count
);
10820 /* Filter out continuing processing after an error. */
10822 || (*code
)->expr1
->ts
.type
!= BT_DERIVED
10823 || (*code
)->expr2
->ts
.type
!= BT_DERIVED
)
10826 /* TODO: Handle more than one part array reference in assignments. */
10827 depth
= nonscalar_typebound_assign ((*code
)->expr1
->ts
.u
.derived
,
10828 (*code
)->expr1
->rank
? 1 : 0);
10831 gfc_warning (0, "TODO: type-bound defined assignment(s) at %L not "
10832 "done because multiple part array references would "
10833 "occur in intermediate expressions.", &(*code
)->loc
);
10837 component_assignment_level
++;
10839 /* Create a temporary so that functions get called only once. */
10840 if ((*code
)->expr2
->expr_type
!= EXPR_VARIABLE
10841 && (*code
)->expr2
->expr_type
!= EXPR_CONSTANT
)
10843 gfc_expr
*tmp_expr
;
10845 /* Assign the rhs to the temporary. */
10846 tmp_expr
= get_temp_from_expr ((*code
)->expr1
, ns
);
10847 this_code
= build_assignment (EXEC_ASSIGN
,
10848 tmp_expr
, (*code
)->expr2
,
10849 NULL
, NULL
, (*code
)->loc
);
10850 /* Add the code and substitute the rhs expression. */
10851 add_code_to_chain (&this_code
, &tmp_head
, &tmp_tail
);
10852 gfc_free_expr ((*code
)->expr2
);
10853 (*code
)->expr2
= tmp_expr
;
10856 /* Do the intrinsic assignment. This is not needed if the lhs is one
10857 of the temporaries generated here, since the intrinsic assignment
10858 to the final result already does this. */
10859 if ((*code
)->expr1
->symtree
->n
.sym
->name
[2] != '@')
10861 this_code
= build_assignment (EXEC_ASSIGN
,
10862 (*code
)->expr1
, (*code
)->expr2
,
10863 NULL
, NULL
, (*code
)->loc
);
10864 add_code_to_chain (&this_code
, &head
, &tail
);
10867 comp1
= (*code
)->expr1
->ts
.u
.derived
->components
;
10868 comp2
= (*code
)->expr2
->ts
.u
.derived
->components
;
10871 for (; comp1
; comp1
= comp1
->next
, comp2
= comp2
->next
)
10873 bool inout
= false;
10875 /* The intrinsic assignment does the right thing for pointers
10876 of all kinds and allocatable components. */
10877 if (!gfc_bt_struct (comp1
->ts
.type
)
10878 || comp1
->attr
.pointer
10879 || comp1
->attr
.allocatable
10880 || comp1
->attr
.proc_pointer_comp
10881 || comp1
->attr
.class_pointer
10882 || comp1
->attr
.proc_pointer
)
10885 /* Make an assigment for this component. */
10886 this_code
= build_assignment (EXEC_ASSIGN
,
10887 (*code
)->expr1
, (*code
)->expr2
,
10888 comp1
, comp2
, (*code
)->loc
);
10890 /* Convert the assignment if there is a defined assignment for
10891 this type. Otherwise, using the call from gfc_resolve_code,
10892 recurse into its components. */
10893 gfc_resolve_code (this_code
, ns
);
10895 if (this_code
->op
== EXEC_ASSIGN_CALL
)
10897 gfc_formal_arglist
*dummy_args
;
10899 /* Check that there is a typebound defined assignment. If not,
10900 then this must be a module defined assignment. We cannot
10901 use the defined_assign_comp attribute here because it must
10902 be this derived type that has the defined assignment and not
10904 if (!(comp1
->ts
.u
.derived
->f2k_derived
10905 && comp1
->ts
.u
.derived
->f2k_derived
10906 ->tb_op
[INTRINSIC_ASSIGN
]))
10908 gfc_free_statements (this_code
);
10913 /* If the first argument of the subroutine has intent INOUT
10914 a temporary must be generated and used instead. */
10915 rsym
= this_code
->resolved_sym
;
10916 dummy_args
= gfc_sym_get_dummy_args (rsym
);
10918 && dummy_args
->sym
->attr
.intent
== INTENT_INOUT
)
10920 gfc_code
*temp_code
;
10923 /* Build the temporary required for the assignment and put
10924 it at the head of the generated code. */
10927 t1
= get_temp_from_expr ((*code
)->expr1
, ns
);
10928 temp_code
= build_assignment (EXEC_ASSIGN
,
10929 t1
, (*code
)->expr1
,
10930 NULL
, NULL
, (*code
)->loc
);
10932 /* For allocatable LHS, check whether it is allocated. Note
10933 that allocatable components with defined assignment are
10934 not yet support. See PR 57696. */
10935 if ((*code
)->expr1
->symtree
->n
.sym
->attr
.allocatable
)
10939 gfc_lval_expr_from_sym ((*code
)->expr1
->symtree
->n
.sym
);
10940 block
= gfc_get_code (EXEC_IF
);
10941 block
->block
= gfc_get_code (EXEC_IF
);
10942 block
->block
->expr1
10943 = gfc_build_intrinsic_call (ns
,
10944 GFC_ISYM_ALLOCATED
, "allocated",
10945 (*code
)->loc
, 1, e
);
10946 block
->block
->next
= temp_code
;
10949 add_code_to_chain (&temp_code
, &tmp_head
, &tmp_tail
);
10952 /* Replace the first actual arg with the component of the
10954 gfc_free_expr (this_code
->ext
.actual
->expr
);
10955 this_code
->ext
.actual
->expr
= gfc_copy_expr (t1
);
10956 add_comp_ref (this_code
->ext
.actual
->expr
, comp1
);
10958 /* If the LHS variable is allocatable and wasn't allocated and
10959 the temporary is allocatable, pointer assign the address of
10960 the freshly allocated LHS to the temporary. */
10961 if ((*code
)->expr1
->symtree
->n
.sym
->attr
.allocatable
10962 && gfc_expr_attr ((*code
)->expr1
).allocatable
)
10967 cond
= gfc_get_expr ();
10968 cond
->ts
.type
= BT_LOGICAL
;
10969 cond
->ts
.kind
= gfc_default_logical_kind
;
10970 cond
->expr_type
= EXPR_OP
;
10971 cond
->where
= (*code
)->loc
;
10972 cond
->value
.op
.op
= INTRINSIC_NOT
;
10973 cond
->value
.op
.op1
= gfc_build_intrinsic_call (ns
,
10974 GFC_ISYM_ALLOCATED
, "allocated",
10975 (*code
)->loc
, 1, gfc_copy_expr (t1
));
10976 block
= gfc_get_code (EXEC_IF
);
10977 block
->block
= gfc_get_code (EXEC_IF
);
10978 block
->block
->expr1
= cond
;
10979 block
->block
->next
= build_assignment (EXEC_POINTER_ASSIGN
,
10980 t1
, (*code
)->expr1
,
10981 NULL
, NULL
, (*code
)->loc
);
10982 add_code_to_chain (&block
, &head
, &tail
);
10986 else if (this_code
->op
== EXEC_ASSIGN
&& !this_code
->next
)
10988 /* Don't add intrinsic assignments since they are already
10989 effected by the intrinsic assignment of the structure. */
10990 gfc_free_statements (this_code
);
10995 add_code_to_chain (&this_code
, &head
, &tail
);
10999 /* Transfer the value to the final result. */
11000 this_code
= build_assignment (EXEC_ASSIGN
,
11001 (*code
)->expr1
, t1
,
11002 comp1
, comp2
, (*code
)->loc
);
11003 add_code_to_chain (&this_code
, &head
, &tail
);
11007 /* Put the temporary assignments at the top of the generated code. */
11008 if (tmp_head
&& component_assignment_level
== 1)
11010 gfc_append_code (tmp_head
, head
);
11012 tmp_head
= tmp_tail
= NULL
;
11015 // If we did a pointer assignment - thus, we need to ensure that the LHS is
11016 // not accidentally deallocated. Hence, nullify t1.
11017 if (t1
&& (*code
)->expr1
->symtree
->n
.sym
->attr
.allocatable
11018 && gfc_expr_attr ((*code
)->expr1
).allocatable
)
11024 e
= gfc_lval_expr_from_sym ((*code
)->expr1
->symtree
->n
.sym
);
11025 cond
= gfc_build_intrinsic_call (ns
, GFC_ISYM_ASSOCIATED
, "associated",
11026 (*code
)->loc
, 2, gfc_copy_expr (t1
), e
);
11027 block
= gfc_get_code (EXEC_IF
);
11028 block
->block
= gfc_get_code (EXEC_IF
);
11029 block
->block
->expr1
= cond
;
11030 block
->block
->next
= build_assignment (EXEC_POINTER_ASSIGN
,
11031 t1
, gfc_get_null_expr (&(*code
)->loc
),
11032 NULL
, NULL
, (*code
)->loc
);
11033 gfc_append_code (tail
, block
);
11037 /* Now attach the remaining code chain to the input code. Step on
11038 to the end of the new code since resolution is complete. */
11039 gcc_assert ((*code
)->op
== EXEC_ASSIGN
);
11040 tail
->next
= (*code
)->next
;
11041 /* Overwrite 'code' because this would place the intrinsic assignment
11042 before the temporary for the lhs is created. */
11043 gfc_free_expr ((*code
)->expr1
);
11044 gfc_free_expr ((*code
)->expr2
);
11050 component_assignment_level
--;
11054 /* F2008: Pointer function assignments are of the form:
11055 ptr_fcn (args) = expr
11056 This function breaks these assignments into two statements:
11057 temporary_pointer => ptr_fcn(args)
11058 temporary_pointer = expr */
11061 resolve_ptr_fcn_assign (gfc_code
**code
, gfc_namespace
*ns
)
11063 gfc_expr
*tmp_ptr_expr
;
11064 gfc_code
*this_code
;
11065 gfc_component
*comp
;
11068 if ((*code
)->expr1
->expr_type
!= EXPR_FUNCTION
)
11071 /* Even if standard does not support this feature, continue to build
11072 the two statements to avoid upsetting frontend_passes.c. */
11073 gfc_notify_std (GFC_STD_F2008
, "Pointer procedure assignment at "
11074 "%L", &(*code
)->loc
);
11076 comp
= gfc_get_proc_ptr_comp ((*code
)->expr1
);
11079 s
= comp
->ts
.interface
;
11081 s
= (*code
)->expr1
->symtree
->n
.sym
;
11083 if (s
== NULL
|| !s
->result
->attr
.pointer
)
11085 gfc_error ("The function result on the lhs of the assignment at "
11086 "%L must have the pointer attribute.",
11087 &(*code
)->expr1
->where
);
11088 (*code
)->op
= EXEC_NOP
;
11092 tmp_ptr_expr
= get_temp_from_expr ((*code
)->expr2
, ns
);
11094 /* get_temp_from_expression is set up for ordinary assignments. To that
11095 end, where array bounds are not known, arrays are made allocatable.
11096 Change the temporary to a pointer here. */
11097 tmp_ptr_expr
->symtree
->n
.sym
->attr
.pointer
= 1;
11098 tmp_ptr_expr
->symtree
->n
.sym
->attr
.allocatable
= 0;
11099 tmp_ptr_expr
->where
= (*code
)->loc
;
11101 this_code
= build_assignment (EXEC_ASSIGN
,
11102 tmp_ptr_expr
, (*code
)->expr2
,
11103 NULL
, NULL
, (*code
)->loc
);
11104 this_code
->next
= (*code
)->next
;
11105 (*code
)->next
= this_code
;
11106 (*code
)->op
= EXEC_POINTER_ASSIGN
;
11107 (*code
)->expr2
= (*code
)->expr1
;
11108 (*code
)->expr1
= tmp_ptr_expr
;
11114 /* Deferred character length assignments from an operator expression
11115 require a temporary because the character length of the lhs can
11116 change in the course of the assignment. */
11119 deferred_op_assign (gfc_code
**code
, gfc_namespace
*ns
)
11121 gfc_expr
*tmp_expr
;
11122 gfc_code
*this_code
;
11124 if (!((*code
)->expr1
->ts
.type
== BT_CHARACTER
11125 && (*code
)->expr1
->ts
.deferred
&& (*code
)->expr1
->rank
11126 && (*code
)->expr2
->expr_type
== EXPR_OP
))
11129 if (!gfc_check_dependency ((*code
)->expr1
, (*code
)->expr2
, 1))
11132 tmp_expr
= get_temp_from_expr ((*code
)->expr1
, ns
);
11133 tmp_expr
->where
= (*code
)->loc
;
11135 /* A new charlen is required to ensure that the variable string
11136 length is different to that of the original lhs. */
11137 tmp_expr
->ts
.u
.cl
= gfc_get_charlen();
11138 tmp_expr
->symtree
->n
.sym
->ts
.u
.cl
= tmp_expr
->ts
.u
.cl
;
11139 tmp_expr
->ts
.u
.cl
->next
= (*code
)->expr2
->ts
.u
.cl
->next
;
11140 (*code
)->expr2
->ts
.u
.cl
->next
= tmp_expr
->ts
.u
.cl
;
11142 tmp_expr
->symtree
->n
.sym
->ts
.deferred
= 1;
11144 this_code
= build_assignment (EXEC_ASSIGN
,
11146 gfc_copy_expr (tmp_expr
),
11147 NULL
, NULL
, (*code
)->loc
);
11149 (*code
)->expr1
= tmp_expr
;
11151 this_code
->next
= (*code
)->next
;
11152 (*code
)->next
= this_code
;
11158 /* Given a block of code, recursively resolve everything pointed to by this
11162 gfc_resolve_code (gfc_code
*code
, gfc_namespace
*ns
)
11164 int omp_workshare_save
;
11165 int forall_save
, do_concurrent_save
;
11169 frame
.prev
= cs_base
;
11173 find_reachable_labels (code
);
11175 for (; code
; code
= code
->next
)
11177 frame
.current
= code
;
11178 forall_save
= forall_flag
;
11179 do_concurrent_save
= gfc_do_concurrent_flag
;
11181 if (code
->op
== EXEC_FORALL
)
11184 gfc_resolve_forall (code
, ns
, forall_save
);
11187 else if (code
->block
)
11189 omp_workshare_save
= -1;
11192 case EXEC_OACC_PARALLEL_LOOP
:
11193 case EXEC_OACC_PARALLEL
:
11194 case EXEC_OACC_KERNELS_LOOP
:
11195 case EXEC_OACC_KERNELS
:
11196 case EXEC_OACC_DATA
:
11197 case EXEC_OACC_HOST_DATA
:
11198 case EXEC_OACC_LOOP
:
11199 gfc_resolve_oacc_blocks (code
, ns
);
11201 case EXEC_OMP_PARALLEL_WORKSHARE
:
11202 omp_workshare_save
= omp_workshare_flag
;
11203 omp_workshare_flag
= 1;
11204 gfc_resolve_omp_parallel_blocks (code
, ns
);
11206 case EXEC_OMP_PARALLEL
:
11207 case EXEC_OMP_PARALLEL_DO
:
11208 case EXEC_OMP_PARALLEL_DO_SIMD
:
11209 case EXEC_OMP_PARALLEL_SECTIONS
:
11210 case EXEC_OMP_TARGET_PARALLEL
:
11211 case EXEC_OMP_TARGET_PARALLEL_DO
:
11212 case EXEC_OMP_TARGET_PARALLEL_DO_SIMD
:
11213 case EXEC_OMP_TARGET_TEAMS
:
11214 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE
:
11215 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO
:
11216 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
11217 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_SIMD
:
11218 case EXEC_OMP_TASK
:
11219 case EXEC_OMP_TASKLOOP
:
11220 case EXEC_OMP_TASKLOOP_SIMD
:
11221 case EXEC_OMP_TEAMS
:
11222 case EXEC_OMP_TEAMS_DISTRIBUTE
:
11223 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO
:
11224 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
11225 case EXEC_OMP_TEAMS_DISTRIBUTE_SIMD
:
11226 omp_workshare_save
= omp_workshare_flag
;
11227 omp_workshare_flag
= 0;
11228 gfc_resolve_omp_parallel_blocks (code
, ns
);
11230 case EXEC_OMP_DISTRIBUTE
:
11231 case EXEC_OMP_DISTRIBUTE_SIMD
:
11233 case EXEC_OMP_DO_SIMD
:
11234 case EXEC_OMP_SIMD
:
11235 case EXEC_OMP_TARGET_SIMD
:
11236 gfc_resolve_omp_do_blocks (code
, ns
);
11238 case EXEC_SELECT_TYPE
:
11239 /* Blocks are handled in resolve_select_type because we have
11240 to transform the SELECT TYPE into ASSOCIATE first. */
11242 case EXEC_DO_CONCURRENT
:
11243 gfc_do_concurrent_flag
= 1;
11244 gfc_resolve_blocks (code
->block
, ns
);
11245 gfc_do_concurrent_flag
= 2;
11247 case EXEC_OMP_WORKSHARE
:
11248 omp_workshare_save
= omp_workshare_flag
;
11249 omp_workshare_flag
= 1;
11252 gfc_resolve_blocks (code
->block
, ns
);
11256 if (omp_workshare_save
!= -1)
11257 omp_workshare_flag
= omp_workshare_save
;
11261 if (code
->op
!= EXEC_COMPCALL
&& code
->op
!= EXEC_CALL_PPC
)
11262 t
= gfc_resolve_expr (code
->expr1
);
11263 forall_flag
= forall_save
;
11264 gfc_do_concurrent_flag
= do_concurrent_save
;
11266 if (!gfc_resolve_expr (code
->expr2
))
11269 if (code
->op
== EXEC_ALLOCATE
11270 && !gfc_resolve_expr (code
->expr3
))
11276 case EXEC_END_BLOCK
:
11277 case EXEC_END_NESTED_BLOCK
:
11281 case EXEC_ERROR_STOP
:
11283 case EXEC_CONTINUE
:
11285 case EXEC_ASSIGN_CALL
:
11288 case EXEC_CRITICAL
:
11289 resolve_critical (code
);
11292 case EXEC_SYNC_ALL
:
11293 case EXEC_SYNC_IMAGES
:
11294 case EXEC_SYNC_MEMORY
:
11295 resolve_sync (code
);
11300 case EXEC_EVENT_POST
:
11301 case EXEC_EVENT_WAIT
:
11302 resolve_lock_unlock_event (code
);
11305 case EXEC_FAIL_IMAGE
:
11306 case EXEC_FORM_TEAM
:
11307 case EXEC_CHANGE_TEAM
:
11308 case EXEC_END_TEAM
:
11309 case EXEC_SYNC_TEAM
:
11313 /* Keep track of which entry we are up to. */
11314 current_entry_id
= code
->ext
.entry
->id
;
11318 resolve_where (code
, NULL
);
11322 if (code
->expr1
!= NULL
)
11324 if (code
->expr1
->ts
.type
!= BT_INTEGER
)
11325 gfc_error ("ASSIGNED GOTO statement at %L requires an "
11326 "INTEGER variable", &code
->expr1
->where
);
11327 else if (code
->expr1
->symtree
->n
.sym
->attr
.assign
!= 1)
11328 gfc_error ("Variable %qs has not been assigned a target "
11329 "label at %L", code
->expr1
->symtree
->n
.sym
->name
,
11330 &code
->expr1
->where
);
11333 resolve_branch (code
->label1
, code
);
11337 if (code
->expr1
!= NULL
11338 && (code
->expr1
->ts
.type
!= BT_INTEGER
|| code
->expr1
->rank
))
11339 gfc_error ("Alternate RETURN statement at %L requires a SCALAR-"
11340 "INTEGER return specifier", &code
->expr1
->where
);
11343 case EXEC_INIT_ASSIGN
:
11344 case EXEC_END_PROCEDURE
:
11351 /* Remove a GFC_ISYM_CAF_GET inserted for a coindexed variable on
11353 if (code
->expr1
->expr_type
== EXPR_FUNCTION
11354 && code
->expr1
->value
.function
.isym
11355 && code
->expr1
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
)
11356 remove_caf_get_intrinsic (code
->expr1
);
11358 /* If this is a pointer function in an lvalue variable context,
11359 the new code will have to be resolved afresh. This is also the
11360 case with an error, where the code is transformed into NOP to
11361 prevent ICEs downstream. */
11362 if (resolve_ptr_fcn_assign (&code
, ns
)
11363 || code
->op
== EXEC_NOP
)
11366 if (!gfc_check_vardef_context (code
->expr1
, false, false, false,
11370 if (resolve_ordinary_assign (code
, ns
))
11372 if (code
->op
== EXEC_COMPCALL
)
11378 /* Check for dependencies in deferred character length array
11379 assignments and generate a temporary, if necessary. */
11380 if (code
->op
== EXEC_ASSIGN
&& deferred_op_assign (&code
, ns
))
11383 /* F03 7.4.1.3 for non-allocatable, non-pointer components. */
11384 if (code
->op
!= EXEC_CALL
&& code
->expr1
->ts
.type
== BT_DERIVED
11385 && code
->expr1
->ts
.u
.derived
11386 && code
->expr1
->ts
.u
.derived
->attr
.defined_assign_comp
)
11387 generate_component_assignments (&code
, ns
);
11391 case EXEC_LABEL_ASSIGN
:
11392 if (code
->label1
->defined
== ST_LABEL_UNKNOWN
)
11393 gfc_error ("Label %d referenced at %L is never defined",
11394 code
->label1
->value
, &code
->label1
->where
);
11396 && (code
->expr1
->expr_type
!= EXPR_VARIABLE
11397 || code
->expr1
->symtree
->n
.sym
->ts
.type
!= BT_INTEGER
11398 || code
->expr1
->symtree
->n
.sym
->ts
.kind
11399 != gfc_default_integer_kind
11400 || code
->expr1
->symtree
->n
.sym
->as
!= NULL
))
11401 gfc_error ("ASSIGN statement at %L requires a scalar "
11402 "default INTEGER variable", &code
->expr1
->where
);
11405 case EXEC_POINTER_ASSIGN
:
11412 /* This is both a variable definition and pointer assignment
11413 context, so check both of them. For rank remapping, a final
11414 array ref may be present on the LHS and fool gfc_expr_attr
11415 used in gfc_check_vardef_context. Remove it. */
11416 e
= remove_last_array_ref (code
->expr1
);
11417 t
= gfc_check_vardef_context (e
, true, false, false,
11418 _("pointer assignment"));
11420 t
= gfc_check_vardef_context (e
, false, false, false,
11421 _("pointer assignment"));
11424 t
= gfc_check_pointer_assign (code
->expr1
, code
->expr2
, !t
) && t
;
11429 /* Assigning a class object always is a regular assign. */
11430 if (code
->expr2
->ts
.type
== BT_CLASS
11431 && code
->expr1
->ts
.type
== BT_CLASS
11432 && !CLASS_DATA (code
->expr2
)->attr
.dimension
11433 && !(gfc_expr_attr (code
->expr1
).proc_pointer
11434 && code
->expr2
->expr_type
== EXPR_VARIABLE
11435 && code
->expr2
->symtree
->n
.sym
->attr
.flavor
11437 code
->op
= EXEC_ASSIGN
;
11441 case EXEC_ARITHMETIC_IF
:
11443 gfc_expr
*e
= code
->expr1
;
11445 gfc_resolve_expr (e
);
11446 if (e
->expr_type
== EXPR_NULL
)
11447 gfc_error ("Invalid NULL at %L", &e
->where
);
11449 if (t
&& (e
->rank
> 0
11450 || !(e
->ts
.type
== BT_REAL
|| e
->ts
.type
== BT_INTEGER
)))
11451 gfc_error ("Arithmetic IF statement at %L requires a scalar "
11452 "REAL or INTEGER expression", &e
->where
);
11454 resolve_branch (code
->label1
, code
);
11455 resolve_branch (code
->label2
, code
);
11456 resolve_branch (code
->label3
, code
);
11461 if (t
&& code
->expr1
!= NULL
11462 && (code
->expr1
->ts
.type
!= BT_LOGICAL
11463 || code
->expr1
->rank
!= 0))
11464 gfc_error ("IF clause at %L requires a scalar LOGICAL expression",
11465 &code
->expr1
->where
);
11470 resolve_call (code
);
11473 case EXEC_COMPCALL
:
11475 resolve_typebound_subroutine (code
);
11478 case EXEC_CALL_PPC
:
11479 resolve_ppc_call (code
);
11483 /* Select is complicated. Also, a SELECT construct could be
11484 a transformed computed GOTO. */
11485 resolve_select (code
, false);
11488 case EXEC_SELECT_TYPE
:
11489 resolve_select_type (code
, ns
);
11493 resolve_block_construct (code
);
11497 if (code
->ext
.iterator
!= NULL
)
11499 gfc_iterator
*iter
= code
->ext
.iterator
;
11500 if (gfc_resolve_iterator (iter
, true, false))
11501 gfc_resolve_do_iterator (code
, iter
->var
->symtree
->n
.sym
,
11506 case EXEC_DO_WHILE
:
11507 if (code
->expr1
== NULL
)
11508 gfc_internal_error ("gfc_resolve_code(): No expression on "
11511 && (code
->expr1
->rank
!= 0
11512 || code
->expr1
->ts
.type
!= BT_LOGICAL
))
11513 gfc_error ("Exit condition of DO WHILE loop at %L must be "
11514 "a scalar LOGICAL expression", &code
->expr1
->where
);
11517 case EXEC_ALLOCATE
:
11519 resolve_allocate_deallocate (code
, "ALLOCATE");
11523 case EXEC_DEALLOCATE
:
11525 resolve_allocate_deallocate (code
, "DEALLOCATE");
11530 if (!gfc_resolve_open (code
->ext
.open
))
11533 resolve_branch (code
->ext
.open
->err
, code
);
11537 if (!gfc_resolve_close (code
->ext
.close
))
11540 resolve_branch (code
->ext
.close
->err
, code
);
11543 case EXEC_BACKSPACE
:
11547 if (!gfc_resolve_filepos (code
->ext
.filepos
))
11550 resolve_branch (code
->ext
.filepos
->err
, code
);
11554 if (!gfc_resolve_inquire (code
->ext
.inquire
))
11557 resolve_branch (code
->ext
.inquire
->err
, code
);
11560 case EXEC_IOLENGTH
:
11561 gcc_assert (code
->ext
.inquire
!= NULL
);
11562 if (!gfc_resolve_inquire (code
->ext
.inquire
))
11565 resolve_branch (code
->ext
.inquire
->err
, code
);
11569 if (!gfc_resolve_wait (code
->ext
.wait
))
11572 resolve_branch (code
->ext
.wait
->err
, code
);
11573 resolve_branch (code
->ext
.wait
->end
, code
);
11574 resolve_branch (code
->ext
.wait
->eor
, code
);
11579 if (!gfc_resolve_dt (code
->ext
.dt
, &code
->loc
))
11582 resolve_branch (code
->ext
.dt
->err
, code
);
11583 resolve_branch (code
->ext
.dt
->end
, code
);
11584 resolve_branch (code
->ext
.dt
->eor
, code
);
11587 case EXEC_TRANSFER
:
11588 resolve_transfer (code
);
11591 case EXEC_DO_CONCURRENT
:
11593 resolve_forall_iterators (code
->ext
.forall_iterator
);
11595 if (code
->expr1
!= NULL
11596 && (code
->expr1
->ts
.type
!= BT_LOGICAL
|| code
->expr1
->rank
))
11597 gfc_error ("FORALL mask clause at %L requires a scalar LOGICAL "
11598 "expression", &code
->expr1
->where
);
11601 case EXEC_OACC_PARALLEL_LOOP
:
11602 case EXEC_OACC_PARALLEL
:
11603 case EXEC_OACC_KERNELS_LOOP
:
11604 case EXEC_OACC_KERNELS
:
11605 case EXEC_OACC_DATA
:
11606 case EXEC_OACC_HOST_DATA
:
11607 case EXEC_OACC_LOOP
:
11608 case EXEC_OACC_UPDATE
:
11609 case EXEC_OACC_WAIT
:
11610 case EXEC_OACC_CACHE
:
11611 case EXEC_OACC_ENTER_DATA
:
11612 case EXEC_OACC_EXIT_DATA
:
11613 case EXEC_OACC_ATOMIC
:
11614 case EXEC_OACC_DECLARE
:
11615 gfc_resolve_oacc_directive (code
, ns
);
11618 case EXEC_OMP_ATOMIC
:
11619 case EXEC_OMP_BARRIER
:
11620 case EXEC_OMP_CANCEL
:
11621 case EXEC_OMP_CANCELLATION_POINT
:
11622 case EXEC_OMP_CRITICAL
:
11623 case EXEC_OMP_FLUSH
:
11624 case EXEC_OMP_DISTRIBUTE
:
11625 case EXEC_OMP_DISTRIBUTE_PARALLEL_DO
:
11626 case EXEC_OMP_DISTRIBUTE_PARALLEL_DO_SIMD
:
11627 case EXEC_OMP_DISTRIBUTE_SIMD
:
11629 case EXEC_OMP_DO_SIMD
:
11630 case EXEC_OMP_MASTER
:
11631 case EXEC_OMP_ORDERED
:
11632 case EXEC_OMP_SECTIONS
:
11633 case EXEC_OMP_SIMD
:
11634 case EXEC_OMP_SINGLE
:
11635 case EXEC_OMP_TARGET
:
11636 case EXEC_OMP_TARGET_DATA
:
11637 case EXEC_OMP_TARGET_ENTER_DATA
:
11638 case EXEC_OMP_TARGET_EXIT_DATA
:
11639 case EXEC_OMP_TARGET_PARALLEL
:
11640 case EXEC_OMP_TARGET_PARALLEL_DO
:
11641 case EXEC_OMP_TARGET_PARALLEL_DO_SIMD
:
11642 case EXEC_OMP_TARGET_SIMD
:
11643 case EXEC_OMP_TARGET_TEAMS
:
11644 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE
:
11645 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO
:
11646 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
11647 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_SIMD
:
11648 case EXEC_OMP_TARGET_UPDATE
:
11649 case EXEC_OMP_TASK
:
11650 case EXEC_OMP_TASKGROUP
:
11651 case EXEC_OMP_TASKLOOP
:
11652 case EXEC_OMP_TASKLOOP_SIMD
:
11653 case EXEC_OMP_TASKWAIT
:
11654 case EXEC_OMP_TASKYIELD
:
11655 case EXEC_OMP_TEAMS
:
11656 case EXEC_OMP_TEAMS_DISTRIBUTE
:
11657 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO
:
11658 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
11659 case EXEC_OMP_TEAMS_DISTRIBUTE_SIMD
:
11660 case EXEC_OMP_WORKSHARE
:
11661 gfc_resolve_omp_directive (code
, ns
);
11664 case EXEC_OMP_PARALLEL
:
11665 case EXEC_OMP_PARALLEL_DO
:
11666 case EXEC_OMP_PARALLEL_DO_SIMD
:
11667 case EXEC_OMP_PARALLEL_SECTIONS
:
11668 case EXEC_OMP_PARALLEL_WORKSHARE
:
11669 omp_workshare_save
= omp_workshare_flag
;
11670 omp_workshare_flag
= 0;
11671 gfc_resolve_omp_directive (code
, ns
);
11672 omp_workshare_flag
= omp_workshare_save
;
11676 gfc_internal_error ("gfc_resolve_code(): Bad statement code");
11680 cs_base
= frame
.prev
;
11684 /* Resolve initial values and make sure they are compatible with
11688 resolve_values (gfc_symbol
*sym
)
11692 if (sym
->value
== NULL
)
11695 if (sym
->value
->expr_type
== EXPR_STRUCTURE
)
11696 t
= resolve_structure_cons (sym
->value
, 1);
11698 t
= gfc_resolve_expr (sym
->value
);
11703 gfc_check_assign_symbol (sym
, NULL
, sym
->value
);
11707 /* Verify any BIND(C) derived types in the namespace so we can report errors
11708 for them once, rather than for each variable declared of that type. */
11711 resolve_bind_c_derived_types (gfc_symbol
*derived_sym
)
11713 if (derived_sym
!= NULL
&& derived_sym
->attr
.flavor
== FL_DERIVED
11714 && derived_sym
->attr
.is_bind_c
== 1)
11715 verify_bind_c_derived_type (derived_sym
);
11721 /* Check the interfaces of DTIO procedures associated with derived
11722 type 'sym'. These procedures can either have typebound bindings or
11723 can appear in DTIO generic interfaces. */
11726 gfc_verify_DTIO_procedures (gfc_symbol
*sym
)
11728 if (!sym
|| sym
->attr
.flavor
!= FL_DERIVED
)
11731 gfc_check_dtio_interfaces (sym
);
11736 /* Verify that any binding labels used in a given namespace do not collide
11737 with the names or binding labels of any global symbols. Multiple INTERFACE
11738 for the same procedure are permitted. */
11741 gfc_verify_binding_labels (gfc_symbol
*sym
)
11744 const char *module
;
11746 if (!sym
|| !sym
->attr
.is_bind_c
|| sym
->attr
.is_iso_c
11747 || sym
->attr
.flavor
== FL_DERIVED
|| !sym
->binding_label
)
11750 gsym
= gfc_find_case_gsymbol (gfc_gsym_root
, sym
->binding_label
);
11753 module
= sym
->module
;
11754 else if (sym
->ns
&& sym
->ns
->proc_name
11755 && sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
)
11756 module
= sym
->ns
->proc_name
->name
;
11757 else if (sym
->ns
&& sym
->ns
->parent
11758 && sym
->ns
&& sym
->ns
->parent
->proc_name
11759 && sym
->ns
->parent
->proc_name
->attr
.flavor
== FL_MODULE
)
11760 module
= sym
->ns
->parent
->proc_name
->name
;
11766 && (gsym
->type
== GSYM_FUNCTION
|| gsym
->type
== GSYM_SUBROUTINE
)))
11769 gsym
= gfc_get_gsymbol (sym
->binding_label
);
11770 gsym
->where
= sym
->declared_at
;
11771 gsym
->sym_name
= sym
->name
;
11772 gsym
->binding_label
= sym
->binding_label
;
11773 gsym
->ns
= sym
->ns
;
11774 gsym
->mod_name
= module
;
11775 if (sym
->attr
.function
)
11776 gsym
->type
= GSYM_FUNCTION
;
11777 else if (sym
->attr
.subroutine
)
11778 gsym
->type
= GSYM_SUBROUTINE
;
11779 /* Mark as variable/procedure as defined, unless its an INTERFACE. */
11780 gsym
->defined
= sym
->attr
.if_source
!= IFSRC_IFBODY
;
11784 if (sym
->attr
.flavor
== FL_VARIABLE
&& gsym
->type
!= GSYM_UNKNOWN
)
11786 gfc_error ("Variable %qs with binding label %qs at %L uses the same global "
11787 "identifier as entity at %L", sym
->name
,
11788 sym
->binding_label
, &sym
->declared_at
, &gsym
->where
);
11789 /* Clear the binding label to prevent checking multiple times. */
11790 sym
->binding_label
= NULL
;
11793 else if (sym
->attr
.flavor
== FL_VARIABLE
&& module
11794 && (strcmp (module
, gsym
->mod_name
) != 0
11795 || strcmp (sym
->name
, gsym
->sym_name
) != 0))
11797 /* This can only happen if the variable is defined in a module - if it
11798 isn't the same module, reject it. */
11799 gfc_error ("Variable %qs from module %qs with binding label %qs at %L "
11800 "uses the same global identifier as entity at %L from module %qs",
11801 sym
->name
, module
, sym
->binding_label
,
11802 &sym
->declared_at
, &gsym
->where
, gsym
->mod_name
);
11803 sym
->binding_label
= NULL
;
11805 else if ((sym
->attr
.function
|| sym
->attr
.subroutine
)
11806 && ((gsym
->type
!= GSYM_SUBROUTINE
&& gsym
->type
!= GSYM_FUNCTION
)
11807 || (gsym
->defined
&& sym
->attr
.if_source
!= IFSRC_IFBODY
))
11808 && sym
!= gsym
->ns
->proc_name
11809 && (module
!= gsym
->mod_name
11810 || strcmp (gsym
->sym_name
, sym
->name
) != 0
11811 || (module
&& strcmp (module
, gsym
->mod_name
) != 0)))
11813 /* Print an error if the procedure is defined multiple times; we have to
11814 exclude references to the same procedure via module association or
11815 multiple checks for the same procedure. */
11816 gfc_error ("Procedure %qs with binding label %qs at %L uses the same "
11817 "global identifier as entity at %L", sym
->name
,
11818 sym
->binding_label
, &sym
->declared_at
, &gsym
->where
);
11819 sym
->binding_label
= NULL
;
11824 /* Resolve an index expression. */
11827 resolve_index_expr (gfc_expr
*e
)
11829 if (!gfc_resolve_expr (e
))
11832 if (!gfc_simplify_expr (e
, 0))
11835 if (!gfc_specification_expr (e
))
11842 /* Resolve a charlen structure. */
11845 resolve_charlen (gfc_charlen
*cl
)
11848 bool saved_specification_expr
;
11854 saved_specification_expr
= specification_expr
;
11855 specification_expr
= true;
11857 if (cl
->length_from_typespec
)
11859 if (!gfc_resolve_expr (cl
->length
))
11861 specification_expr
= saved_specification_expr
;
11865 if (!gfc_simplify_expr (cl
->length
, 0))
11867 specification_expr
= saved_specification_expr
;
11871 /* cl->length has been resolved. It should have an integer type. */
11872 if (cl
->length
->ts
.type
!= BT_INTEGER
)
11874 gfc_error ("Scalar INTEGER expression expected at %L",
11875 &cl
->length
->where
);
11881 if (!resolve_index_expr (cl
->length
))
11883 specification_expr
= saved_specification_expr
;
11888 /* F2008, 4.4.3.2: If the character length parameter value evaluates to
11889 a negative value, the length of character entities declared is zero. */
11890 if (cl
->length
&& cl
->length
->expr_type
== EXPR_CONSTANT
11891 && mpz_sgn (cl
->length
->value
.integer
) < 0)
11892 gfc_replace_expr (cl
->length
,
11893 gfc_get_int_expr (gfc_charlen_int_kind
, NULL
, 0));
11895 /* Check that the character length is not too large. */
11896 k
= gfc_validate_kind (BT_INTEGER
, gfc_charlen_int_kind
, false);
11897 if (cl
->length
&& cl
->length
->expr_type
== EXPR_CONSTANT
11898 && cl
->length
->ts
.type
== BT_INTEGER
11899 && mpz_cmp (cl
->length
->value
.integer
, gfc_integer_kinds
[k
].huge
) > 0)
11901 gfc_error ("String length at %L is too large", &cl
->length
->where
);
11902 specification_expr
= saved_specification_expr
;
11906 specification_expr
= saved_specification_expr
;
11911 /* Test for non-constant shape arrays. */
11914 is_non_constant_shape_array (gfc_symbol
*sym
)
11920 not_constant
= false;
11921 if (sym
->as
!= NULL
)
11923 /* Unfortunately, !gfc_is_compile_time_shape hits a legal case that
11924 has not been simplified; parameter array references. Do the
11925 simplification now. */
11926 for (i
= 0; i
< sym
->as
->rank
+ sym
->as
->corank
; i
++)
11928 e
= sym
->as
->lower
[i
];
11929 if (e
&& (!resolve_index_expr(e
)
11930 || !gfc_is_constant_expr (e
)))
11931 not_constant
= true;
11932 e
= sym
->as
->upper
[i
];
11933 if (e
&& (!resolve_index_expr(e
)
11934 || !gfc_is_constant_expr (e
)))
11935 not_constant
= true;
11938 return not_constant
;
11941 /* Given a symbol and an initialization expression, add code to initialize
11942 the symbol to the function entry. */
11944 build_init_assign (gfc_symbol
*sym
, gfc_expr
*init
)
11948 gfc_namespace
*ns
= sym
->ns
;
11950 /* Search for the function namespace if this is a contained
11951 function without an explicit result. */
11952 if (sym
->attr
.function
&& sym
== sym
->result
11953 && sym
->name
!= sym
->ns
->proc_name
->name
)
11955 ns
= ns
->contained
;
11956 for (;ns
; ns
= ns
->sibling
)
11957 if (strcmp (ns
->proc_name
->name
, sym
->name
) == 0)
11963 gfc_free_expr (init
);
11967 /* Build an l-value expression for the result. */
11968 lval
= gfc_lval_expr_from_sym (sym
);
11970 /* Add the code at scope entry. */
11971 init_st
= gfc_get_code (EXEC_INIT_ASSIGN
);
11972 init_st
->next
= ns
->code
;
11973 ns
->code
= init_st
;
11975 /* Assign the default initializer to the l-value. */
11976 init_st
->loc
= sym
->declared_at
;
11977 init_st
->expr1
= lval
;
11978 init_st
->expr2
= init
;
11982 /* Whether or not we can generate a default initializer for a symbol. */
11985 can_generate_init (gfc_symbol
*sym
)
11987 symbol_attribute
*a
;
11992 /* These symbols should never have a default initialization. */
11997 || (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
)
11998 && (CLASS_DATA (sym
)->attr
.class_pointer
11999 || CLASS_DATA (sym
)->attr
.proc_pointer
))
12000 || a
->in_equivalence
12007 || (!a
->referenced
&& !a
->result
)
12008 || (a
->dummy
&& a
->intent
!= INTENT_OUT
)
12009 || (a
->function
&& sym
!= sym
->result
)
12014 /* Assign the default initializer to a derived type variable or result. */
12017 apply_default_init (gfc_symbol
*sym
)
12019 gfc_expr
*init
= NULL
;
12021 if (sym
->attr
.flavor
!= FL_VARIABLE
&& !sym
->attr
.function
)
12024 if (sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
)
12025 init
= gfc_generate_initializer (&sym
->ts
, can_generate_init (sym
));
12027 if (init
== NULL
&& sym
->ts
.type
!= BT_CLASS
)
12030 build_init_assign (sym
, init
);
12031 sym
->attr
.referenced
= 1;
12035 /* Build an initializer for a local. Returns null if the symbol should not have
12036 a default initialization. */
12039 build_default_init_expr (gfc_symbol
*sym
)
12041 /* These symbols should never have a default initialization. */
12042 if (sym
->attr
.allocatable
12043 || sym
->attr
.external
12045 || sym
->attr
.pointer
12046 || sym
->attr
.in_equivalence
12047 || sym
->attr
.in_common
12050 || sym
->attr
.cray_pointee
12051 || sym
->attr
.cray_pointer
12055 /* Get the appropriate init expression. */
12056 return gfc_build_default_init_expr (&sym
->ts
, &sym
->declared_at
);
12059 /* Add an initialization expression to a local variable. */
12061 apply_default_init_local (gfc_symbol
*sym
)
12063 gfc_expr
*init
= NULL
;
12065 /* The symbol should be a variable or a function return value. */
12066 if ((sym
->attr
.flavor
!= FL_VARIABLE
&& !sym
->attr
.function
)
12067 || (sym
->attr
.function
&& sym
->result
!= sym
))
12070 /* Try to build the initializer expression. If we can't initialize
12071 this symbol, then init will be NULL. */
12072 init
= build_default_init_expr (sym
);
12076 /* For saved variables, we don't want to add an initializer at function
12077 entry, so we just add a static initializer. Note that automatic variables
12078 are stack allocated even with -fno-automatic; we have also to exclude
12079 result variable, which are also nonstatic. */
12080 if (!sym
->attr
.automatic
12081 && (sym
->attr
.save
|| sym
->ns
->save_all
12082 || (flag_max_stack_var_size
== 0 && !sym
->attr
.result
12083 && (sym
->ns
->proc_name
&& !sym
->ns
->proc_name
->attr
.recursive
)
12084 && (!sym
->attr
.dimension
|| !is_non_constant_shape_array (sym
)))))
12086 /* Don't clobber an existing initializer! */
12087 gcc_assert (sym
->value
== NULL
);
12092 build_init_assign (sym
, init
);
12096 /* Resolution of common features of flavors variable and procedure. */
12099 resolve_fl_var_and_proc (gfc_symbol
*sym
, int mp_flag
)
12101 gfc_array_spec
*as
;
12103 if (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
)
12104 as
= CLASS_DATA (sym
)->as
;
12108 /* Constraints on deferred shape variable. */
12109 if (as
== NULL
|| as
->type
!= AS_DEFERRED
)
12111 bool pointer
, allocatable
, dimension
;
12113 if (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
)
12115 pointer
= CLASS_DATA (sym
)->attr
.class_pointer
;
12116 allocatable
= CLASS_DATA (sym
)->attr
.allocatable
;
12117 dimension
= CLASS_DATA (sym
)->attr
.dimension
;
12121 pointer
= sym
->attr
.pointer
&& !sym
->attr
.select_type_temporary
;
12122 allocatable
= sym
->attr
.allocatable
;
12123 dimension
= sym
->attr
.dimension
;
12128 if (dimension
&& as
->type
!= AS_ASSUMED_RANK
)
12130 gfc_error ("Allocatable array %qs at %L must have a deferred "
12131 "shape or assumed rank", sym
->name
, &sym
->declared_at
);
12134 else if (!gfc_notify_std (GFC_STD_F2003
, "Scalar object "
12135 "%qs at %L may not be ALLOCATABLE",
12136 sym
->name
, &sym
->declared_at
))
12140 if (pointer
&& dimension
&& as
->type
!= AS_ASSUMED_RANK
)
12142 gfc_error ("Array pointer %qs at %L must have a deferred shape or "
12143 "assumed rank", sym
->name
, &sym
->declared_at
);
12149 if (!mp_flag
&& !sym
->attr
.allocatable
&& !sym
->attr
.pointer
12150 && sym
->ts
.type
!= BT_CLASS
&& !sym
->assoc
)
12152 gfc_error ("Array %qs at %L cannot have a deferred shape",
12153 sym
->name
, &sym
->declared_at
);
12158 /* Constraints on polymorphic variables. */
12159 if (sym
->ts
.type
== BT_CLASS
&& !(sym
->result
&& sym
->result
!= sym
))
12162 if (sym
->attr
.class_ok
12163 && !sym
->attr
.select_type_temporary
12164 && !UNLIMITED_POLY (sym
)
12165 && !gfc_type_is_extensible (CLASS_DATA (sym
)->ts
.u
.derived
))
12167 gfc_error ("Type %qs of CLASS variable %qs at %L is not extensible",
12168 CLASS_DATA (sym
)->ts
.u
.derived
->name
, sym
->name
,
12169 &sym
->declared_at
);
12174 /* Assume that use associated symbols were checked in the module ns.
12175 Class-variables that are associate-names are also something special
12176 and excepted from the test. */
12177 if (!sym
->attr
.class_ok
&& !sym
->attr
.use_assoc
&& !sym
->assoc
)
12179 gfc_error ("CLASS variable %qs at %L must be dummy, allocatable "
12180 "or pointer", sym
->name
, &sym
->declared_at
);
12189 /* Additional checks for symbols with flavor variable and derived
12190 type. To be called from resolve_fl_variable. */
12193 resolve_fl_variable_derived (gfc_symbol
*sym
, int no_init_flag
)
12195 gcc_assert (sym
->ts
.type
== BT_DERIVED
|| sym
->ts
.type
== BT_CLASS
);
12197 /* Check to see if a derived type is blocked from being host
12198 associated by the presence of another class I symbol in the same
12199 namespace. 14.6.1.3 of the standard and the discussion on
12200 comp.lang.fortran. */
12201 if (sym
->ns
!= sym
->ts
.u
.derived
->ns
12202 && !sym
->ts
.u
.derived
->attr
.use_assoc
12203 && sym
->ns
->proc_name
->attr
.if_source
!= IFSRC_IFBODY
)
12206 gfc_find_symbol (sym
->ts
.u
.derived
->name
, sym
->ns
, 0, &s
);
12207 if (s
&& s
->attr
.generic
)
12208 s
= gfc_find_dt_in_generic (s
);
12209 if (s
&& !gfc_fl_struct (s
->attr
.flavor
))
12211 gfc_error ("The type %qs cannot be host associated at %L "
12212 "because it is blocked by an incompatible object "
12213 "of the same name declared at %L",
12214 sym
->ts
.u
.derived
->name
, &sym
->declared_at
,
12220 /* 4th constraint in section 11.3: "If an object of a type for which
12221 component-initialization is specified (R429) appears in the
12222 specification-part of a module and does not have the ALLOCATABLE
12223 or POINTER attribute, the object shall have the SAVE attribute."
12225 The check for initializers is performed with
12226 gfc_has_default_initializer because gfc_default_initializer generates
12227 a hidden default for allocatable components. */
12228 if (!(sym
->value
|| no_init_flag
) && sym
->ns
->proc_name
12229 && sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
12230 && !(sym
->ns
->save_all
&& !sym
->attr
.automatic
) && !sym
->attr
.save
12231 && !sym
->attr
.pointer
&& !sym
->attr
.allocatable
12232 && gfc_has_default_initializer (sym
->ts
.u
.derived
)
12233 && !gfc_notify_std (GFC_STD_F2008
, "Implied SAVE for module variable "
12234 "%qs at %L, needed due to the default "
12235 "initialization", sym
->name
, &sym
->declared_at
))
12238 /* Assign default initializer. */
12239 if (!(sym
->value
|| sym
->attr
.pointer
|| sym
->attr
.allocatable
)
12240 && (!no_init_flag
|| sym
->attr
.intent
== INTENT_OUT
))
12241 sym
->value
= gfc_generate_initializer (&sym
->ts
, can_generate_init (sym
));
12247 /* F2008, C402 (R401): A colon shall not be used as a type-param-value
12248 except in the declaration of an entity or component that has the POINTER
12249 or ALLOCATABLE attribute. */
12252 deferred_requirements (gfc_symbol
*sym
)
12254 if (sym
->ts
.deferred
12255 && !(sym
->attr
.pointer
12256 || sym
->attr
.allocatable
12257 || sym
->attr
.associate_var
12258 || sym
->attr
.omp_udr_artificial_var
))
12260 gfc_error ("Entity %qs at %L has a deferred type parameter and "
12261 "requires either the POINTER or ALLOCATABLE attribute",
12262 sym
->name
, &sym
->declared_at
);
12269 /* Resolve symbols with flavor variable. */
12272 resolve_fl_variable (gfc_symbol
*sym
, int mp_flag
)
12274 int no_init_flag
, automatic_flag
;
12276 const char *auto_save_msg
;
12277 bool saved_specification_expr
;
12279 auto_save_msg
= "Automatic object %qs at %L cannot have the "
12282 if (!resolve_fl_var_and_proc (sym
, mp_flag
))
12285 /* Set this flag to check that variables are parameters of all entries.
12286 This check is effected by the call to gfc_resolve_expr through
12287 is_non_constant_shape_array. */
12288 saved_specification_expr
= specification_expr
;
12289 specification_expr
= true;
12291 if (sym
->ns
->proc_name
12292 && (sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
12293 || sym
->ns
->proc_name
->attr
.is_main_program
)
12294 && !sym
->attr
.use_assoc
12295 && !sym
->attr
.allocatable
12296 && !sym
->attr
.pointer
12297 && is_non_constant_shape_array (sym
))
12299 /* F08:C541. The shape of an array defined in a main program or module
12300 * needs to be constant. */
12301 gfc_error ("The module or main program array %qs at %L must "
12302 "have constant shape", sym
->name
, &sym
->declared_at
);
12303 specification_expr
= saved_specification_expr
;
12307 /* Constraints on deferred type parameter. */
12308 if (!deferred_requirements (sym
))
12311 if (sym
->ts
.type
== BT_CHARACTER
&& !sym
->attr
.associate_var
)
12313 /* Make sure that character string variables with assumed length are
12314 dummy arguments. */
12315 e
= sym
->ts
.u
.cl
->length
;
12316 if (e
== NULL
&& !sym
->attr
.dummy
&& !sym
->attr
.result
12317 && !sym
->ts
.deferred
&& !sym
->attr
.select_type_temporary
12318 && !sym
->attr
.omp_udr_artificial_var
)
12320 gfc_error ("Entity with assumed character length at %L must be a "
12321 "dummy argument or a PARAMETER", &sym
->declared_at
);
12322 specification_expr
= saved_specification_expr
;
12326 if (e
&& sym
->attr
.save
== SAVE_EXPLICIT
&& !gfc_is_constant_expr (e
))
12328 gfc_error (auto_save_msg
, sym
->name
, &sym
->declared_at
);
12329 specification_expr
= saved_specification_expr
;
12333 if (!gfc_is_constant_expr (e
)
12334 && !(e
->expr_type
== EXPR_VARIABLE
12335 && e
->symtree
->n
.sym
->attr
.flavor
== FL_PARAMETER
))
12337 if (!sym
->attr
.use_assoc
&& sym
->ns
->proc_name
12338 && (sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
12339 || sym
->ns
->proc_name
->attr
.is_main_program
))
12341 gfc_error ("%qs at %L must have constant character length "
12342 "in this context", sym
->name
, &sym
->declared_at
);
12343 specification_expr
= saved_specification_expr
;
12346 if (sym
->attr
.in_common
)
12348 gfc_error ("COMMON variable %qs at %L must have constant "
12349 "character length", sym
->name
, &sym
->declared_at
);
12350 specification_expr
= saved_specification_expr
;
12356 if (sym
->value
== NULL
&& sym
->attr
.referenced
)
12357 apply_default_init_local (sym
); /* Try to apply a default initialization. */
12359 /* Determine if the symbol may not have an initializer. */
12360 no_init_flag
= automatic_flag
= 0;
12361 if (sym
->attr
.allocatable
|| sym
->attr
.external
|| sym
->attr
.dummy
12362 || sym
->attr
.intrinsic
|| sym
->attr
.result
)
12364 else if ((sym
->attr
.dimension
|| sym
->attr
.codimension
) && !sym
->attr
.pointer
12365 && is_non_constant_shape_array (sym
))
12367 no_init_flag
= automatic_flag
= 1;
12369 /* Also, they must not have the SAVE attribute.
12370 SAVE_IMPLICIT is checked below. */
12371 if (sym
->as
&& sym
->attr
.codimension
)
12373 int corank
= sym
->as
->corank
;
12374 sym
->as
->corank
= 0;
12375 no_init_flag
= automatic_flag
= is_non_constant_shape_array (sym
);
12376 sym
->as
->corank
= corank
;
12378 if (automatic_flag
&& sym
->attr
.save
== SAVE_EXPLICIT
)
12380 gfc_error (auto_save_msg
, sym
->name
, &sym
->declared_at
);
12381 specification_expr
= saved_specification_expr
;
12386 /* Ensure that any initializer is simplified. */
12388 gfc_simplify_expr (sym
->value
, 1);
12390 /* Reject illegal initializers. */
12391 if (!sym
->mark
&& sym
->value
)
12393 if (sym
->attr
.allocatable
|| (sym
->ts
.type
== BT_CLASS
12394 && CLASS_DATA (sym
)->attr
.allocatable
))
12395 gfc_error ("Allocatable %qs at %L cannot have an initializer",
12396 sym
->name
, &sym
->declared_at
);
12397 else if (sym
->attr
.external
)
12398 gfc_error ("External %qs at %L cannot have an initializer",
12399 sym
->name
, &sym
->declared_at
);
12400 else if (sym
->attr
.dummy
12401 && !(sym
->ts
.type
== BT_DERIVED
&& sym
->attr
.intent
== INTENT_OUT
))
12402 gfc_error ("Dummy %qs at %L cannot have an initializer",
12403 sym
->name
, &sym
->declared_at
);
12404 else if (sym
->attr
.intrinsic
)
12405 gfc_error ("Intrinsic %qs at %L cannot have an initializer",
12406 sym
->name
, &sym
->declared_at
);
12407 else if (sym
->attr
.result
)
12408 gfc_error ("Function result %qs at %L cannot have an initializer",
12409 sym
->name
, &sym
->declared_at
);
12410 else if (automatic_flag
)
12411 gfc_error ("Automatic array %qs at %L cannot have an initializer",
12412 sym
->name
, &sym
->declared_at
);
12414 goto no_init_error
;
12415 specification_expr
= saved_specification_expr
;
12420 if (sym
->ts
.type
== BT_DERIVED
|| sym
->ts
.type
== BT_CLASS
)
12422 bool res
= resolve_fl_variable_derived (sym
, no_init_flag
);
12423 specification_expr
= saved_specification_expr
;
12427 specification_expr
= saved_specification_expr
;
12432 /* Compare the dummy characteristics of a module procedure interface
12433 declaration with the corresponding declaration in a submodule. */
12434 static gfc_formal_arglist
*new_formal
;
12435 static char errmsg
[200];
12438 compare_fsyms (gfc_symbol
*sym
)
12442 if (sym
== NULL
|| new_formal
== NULL
)
12445 fsym
= new_formal
->sym
;
12450 if (strcmp (sym
->name
, fsym
->name
) == 0)
12452 if (!gfc_check_dummy_characteristics (fsym
, sym
, true, errmsg
, 200))
12453 gfc_error ("%s at %L", errmsg
, &fsym
->declared_at
);
12458 /* Resolve a procedure. */
12461 resolve_fl_procedure (gfc_symbol
*sym
, int mp_flag
)
12463 gfc_formal_arglist
*arg
;
12465 if (sym
->attr
.function
12466 && !resolve_fl_var_and_proc (sym
, mp_flag
))
12469 if (sym
->ts
.type
== BT_CHARACTER
)
12471 gfc_charlen
*cl
= sym
->ts
.u
.cl
;
12473 if (cl
&& cl
->length
&& gfc_is_constant_expr (cl
->length
)
12474 && !resolve_charlen (cl
))
12477 if ((!cl
|| !cl
->length
|| cl
->length
->expr_type
!= EXPR_CONSTANT
)
12478 && sym
->attr
.proc
== PROC_ST_FUNCTION
)
12480 gfc_error ("Character-valued statement function %qs at %L must "
12481 "have constant length", sym
->name
, &sym
->declared_at
);
12486 /* Ensure that derived type for are not of a private type. Internal
12487 module procedures are excluded by 2.2.3.3 - i.e., they are not
12488 externally accessible and can access all the objects accessible in
12490 if (!(sym
->ns
->parent
12491 && sym
->ns
->parent
->proc_name
->attr
.flavor
== FL_MODULE
)
12492 && gfc_check_symbol_access (sym
))
12494 gfc_interface
*iface
;
12496 for (arg
= gfc_sym_get_dummy_args (sym
); arg
; arg
= arg
->next
)
12499 && arg
->sym
->ts
.type
== BT_DERIVED
12500 && !arg
->sym
->ts
.u
.derived
->attr
.use_assoc
12501 && !gfc_check_symbol_access (arg
->sym
->ts
.u
.derived
)
12502 && !gfc_notify_std (GFC_STD_F2003
, "%qs is of a PRIVATE type "
12503 "and cannot be a dummy argument"
12504 " of %qs, which is PUBLIC at %L",
12505 arg
->sym
->name
, sym
->name
,
12506 &sym
->declared_at
))
12508 /* Stop this message from recurring. */
12509 arg
->sym
->ts
.u
.derived
->attr
.access
= ACCESS_PUBLIC
;
12514 /* PUBLIC interfaces may expose PRIVATE procedures that take types
12515 PRIVATE to the containing module. */
12516 for (iface
= sym
->generic
; iface
; iface
= iface
->next
)
12518 for (arg
= gfc_sym_get_dummy_args (iface
->sym
); arg
; arg
= arg
->next
)
12521 && arg
->sym
->ts
.type
== BT_DERIVED
12522 && !arg
->sym
->ts
.u
.derived
->attr
.use_assoc
12523 && !gfc_check_symbol_access (arg
->sym
->ts
.u
.derived
)
12524 && !gfc_notify_std (GFC_STD_F2003
, "Procedure %qs in "
12525 "PUBLIC interface %qs at %L "
12526 "takes dummy arguments of %qs which "
12527 "is PRIVATE", iface
->sym
->name
,
12528 sym
->name
, &iface
->sym
->declared_at
,
12529 gfc_typename(&arg
->sym
->ts
)))
12531 /* Stop this message from recurring. */
12532 arg
->sym
->ts
.u
.derived
->attr
.access
= ACCESS_PUBLIC
;
12539 if (sym
->attr
.function
&& sym
->value
&& sym
->attr
.proc
!= PROC_ST_FUNCTION
12540 && !sym
->attr
.proc_pointer
)
12542 gfc_error ("Function %qs at %L cannot have an initializer",
12543 sym
->name
, &sym
->declared_at
);
12545 /* Make sure no second error is issued for this. */
12546 sym
->value
->error
= 1;
12550 /* An external symbol may not have an initializer because it is taken to be
12551 a procedure. Exception: Procedure Pointers. */
12552 if (sym
->attr
.external
&& sym
->value
&& !sym
->attr
.proc_pointer
)
12554 gfc_error ("External object %qs at %L may not have an initializer",
12555 sym
->name
, &sym
->declared_at
);
12559 /* An elemental function is required to return a scalar 12.7.1 */
12560 if (sym
->attr
.elemental
&& sym
->attr
.function
12561 && (sym
->as
|| (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
)->as
)))
12563 gfc_error ("ELEMENTAL function %qs at %L must have a scalar "
12564 "result", sym
->name
, &sym
->declared_at
);
12565 /* Reset so that the error only occurs once. */
12566 sym
->attr
.elemental
= 0;
12570 if (sym
->attr
.proc
== PROC_ST_FUNCTION
12571 && (sym
->attr
.allocatable
|| sym
->attr
.pointer
))
12573 gfc_error ("Statement function %qs at %L may not have pointer or "
12574 "allocatable attribute", sym
->name
, &sym
->declared_at
);
12578 /* 5.1.1.5 of the Standard: A function name declared with an asterisk
12579 char-len-param shall not be array-valued, pointer-valued, recursive
12580 or pure. ....snip... A character value of * may only be used in the
12581 following ways: (i) Dummy arg of procedure - dummy associates with
12582 actual length; (ii) To declare a named constant; or (iii) External
12583 function - but length must be declared in calling scoping unit. */
12584 if (sym
->attr
.function
12585 && sym
->ts
.type
== BT_CHARACTER
&& !sym
->ts
.deferred
12586 && sym
->ts
.u
.cl
&& sym
->ts
.u
.cl
->length
== NULL
)
12588 if ((sym
->as
&& sym
->as
->rank
) || (sym
->attr
.pointer
)
12589 || (sym
->attr
.recursive
) || (sym
->attr
.pure
))
12591 if (sym
->as
&& sym
->as
->rank
)
12592 gfc_error ("CHARACTER(*) function %qs at %L cannot be "
12593 "array-valued", sym
->name
, &sym
->declared_at
);
12595 if (sym
->attr
.pointer
)
12596 gfc_error ("CHARACTER(*) function %qs at %L cannot be "
12597 "pointer-valued", sym
->name
, &sym
->declared_at
);
12599 if (sym
->attr
.pure
)
12600 gfc_error ("CHARACTER(*) function %qs at %L cannot be "
12601 "pure", sym
->name
, &sym
->declared_at
);
12603 if (sym
->attr
.recursive
)
12604 gfc_error ("CHARACTER(*) function %qs at %L cannot be "
12605 "recursive", sym
->name
, &sym
->declared_at
);
12610 /* Appendix B.2 of the standard. Contained functions give an
12611 error anyway. Deferred character length is an F2003 feature.
12612 Don't warn on intrinsic conversion functions, which start
12613 with two underscores. */
12614 if (!sym
->attr
.contained
&& !sym
->ts
.deferred
12615 && (sym
->name
[0] != '_' || sym
->name
[1] != '_'))
12616 gfc_notify_std (GFC_STD_F95_OBS
,
12617 "CHARACTER(*) function %qs at %L",
12618 sym
->name
, &sym
->declared_at
);
12621 /* F2008, C1218. */
12622 if (sym
->attr
.elemental
)
12624 if (sym
->attr
.proc_pointer
)
12626 gfc_error ("Procedure pointer %qs at %L shall not be elemental",
12627 sym
->name
, &sym
->declared_at
);
12630 if (sym
->attr
.dummy
)
12632 gfc_error ("Dummy procedure %qs at %L shall not be elemental",
12633 sym
->name
, &sym
->declared_at
);
12638 /* F2018, C15100: "The result of an elemental function shall be scalar,
12639 and shall not have the POINTER or ALLOCATABLE attribute." The scalar
12640 pointer is tested and caught elsewhere. */
12641 if (sym
->attr
.elemental
&& sym
->result
12642 && (sym
->result
->attr
.allocatable
|| sym
->result
->attr
.pointer
))
12644 gfc_error ("Function result variable %qs at %L of elemental "
12645 "function %qs shall not have an ALLOCATABLE or POINTER "
12646 "attribute", sym
->result
->name
,
12647 &sym
->result
->declared_at
, sym
->name
);
12651 if (sym
->attr
.is_bind_c
&& sym
->attr
.is_c_interop
!= 1)
12653 gfc_formal_arglist
*curr_arg
;
12654 int has_non_interop_arg
= 0;
12656 if (!verify_bind_c_sym (sym
, &(sym
->ts
), sym
->attr
.in_common
,
12657 sym
->common_block
))
12659 /* Clear these to prevent looking at them again if there was an
12661 sym
->attr
.is_bind_c
= 0;
12662 sym
->attr
.is_c_interop
= 0;
12663 sym
->ts
.is_c_interop
= 0;
12667 /* So far, no errors have been found. */
12668 sym
->attr
.is_c_interop
= 1;
12669 sym
->ts
.is_c_interop
= 1;
12672 curr_arg
= gfc_sym_get_dummy_args (sym
);
12673 while (curr_arg
!= NULL
)
12675 /* Skip implicitly typed dummy args here. */
12676 if (curr_arg
->sym
&& curr_arg
->sym
->attr
.implicit_type
== 0)
12677 if (!gfc_verify_c_interop_param (curr_arg
->sym
))
12678 /* If something is found to fail, record the fact so we
12679 can mark the symbol for the procedure as not being
12680 BIND(C) to try and prevent multiple errors being
12682 has_non_interop_arg
= 1;
12684 curr_arg
= curr_arg
->next
;
12687 /* See if any of the arguments were not interoperable and if so, clear
12688 the procedure symbol to prevent duplicate error messages. */
12689 if (has_non_interop_arg
!= 0)
12691 sym
->attr
.is_c_interop
= 0;
12692 sym
->ts
.is_c_interop
= 0;
12693 sym
->attr
.is_bind_c
= 0;
12697 if (!sym
->attr
.proc_pointer
)
12699 if (sym
->attr
.save
== SAVE_EXPLICIT
)
12701 gfc_error ("PROCEDURE attribute conflicts with SAVE attribute "
12702 "in %qs at %L", sym
->name
, &sym
->declared_at
);
12705 if (sym
->attr
.intent
)
12707 gfc_error ("PROCEDURE attribute conflicts with INTENT attribute "
12708 "in %qs at %L", sym
->name
, &sym
->declared_at
);
12711 if (sym
->attr
.subroutine
&& sym
->attr
.result
)
12713 gfc_error ("PROCEDURE attribute conflicts with RESULT attribute "
12714 "in %qs at %L", sym
->name
, &sym
->declared_at
);
12717 if (sym
->attr
.external
&& sym
->attr
.function
&& !sym
->attr
.module_procedure
12718 && ((sym
->attr
.if_source
== IFSRC_DECL
&& !sym
->attr
.procedure
)
12719 || sym
->attr
.contained
))
12721 gfc_error ("EXTERNAL attribute conflicts with FUNCTION attribute "
12722 "in %qs at %L", sym
->name
, &sym
->declared_at
);
12725 if (strcmp ("ppr@", sym
->name
) == 0)
12727 gfc_error ("Procedure pointer result %qs at %L "
12728 "is missing the pointer attribute",
12729 sym
->ns
->proc_name
->name
, &sym
->declared_at
);
12734 /* Assume that a procedure whose body is not known has references
12735 to external arrays. */
12736 if (sym
->attr
.if_source
!= IFSRC_DECL
)
12737 sym
->attr
.array_outer_dependency
= 1;
12739 /* Compare the characteristics of a module procedure with the
12740 interface declaration. Ideally this would be done with
12741 gfc_compare_interfaces but, at present, the formal interface
12742 cannot be copied to the ts.interface. */
12743 if (sym
->attr
.module_procedure
12744 && sym
->attr
.if_source
== IFSRC_DECL
)
12747 char name
[2*GFC_MAX_SYMBOL_LEN
+ 1];
12749 char *submodule_name
;
12750 strcpy (name
, sym
->ns
->proc_name
->name
);
12751 module_name
= strtok (name
, ".");
12752 submodule_name
= strtok (NULL
, ".");
12754 iface
= sym
->tlink
;
12757 /* Make sure that the result uses the correct charlen for deferred
12759 if (iface
&& sym
->result
12760 && iface
->ts
.type
== BT_CHARACTER
12761 && iface
->ts
.deferred
)
12762 sym
->result
->ts
.u
.cl
= iface
->ts
.u
.cl
;
12767 /* Check the procedure characteristics. */
12768 if (sym
->attr
.elemental
!= iface
->attr
.elemental
)
12770 gfc_error ("Mismatch in ELEMENTAL attribute between MODULE "
12771 "PROCEDURE at %L and its interface in %s",
12772 &sym
->declared_at
, module_name
);
12776 if (sym
->attr
.pure
!= iface
->attr
.pure
)
12778 gfc_error ("Mismatch in PURE attribute between MODULE "
12779 "PROCEDURE at %L and its interface in %s",
12780 &sym
->declared_at
, module_name
);
12784 if (sym
->attr
.recursive
!= iface
->attr
.recursive
)
12786 gfc_error ("Mismatch in RECURSIVE attribute between MODULE "
12787 "PROCEDURE at %L and its interface in %s",
12788 &sym
->declared_at
, module_name
);
12792 /* Check the result characteristics. */
12793 if (!gfc_check_result_characteristics (sym
, iface
, errmsg
, 200))
12795 gfc_error ("%s between the MODULE PROCEDURE declaration "
12796 "in MODULE %qs and the declaration at %L in "
12798 errmsg
, module_name
, &sym
->declared_at
,
12799 submodule_name
? submodule_name
: module_name
);
12804 /* Check the characteristics of the formal arguments. */
12805 if (sym
->formal
&& sym
->formal_ns
)
12807 for (arg
= sym
->formal
; arg
&& arg
->sym
; arg
= arg
->next
)
12810 gfc_traverse_ns (sym
->formal_ns
, compare_fsyms
);
12818 /* Resolve a list of finalizer procedures. That is, after they have hopefully
12819 been defined and we now know their defined arguments, check that they fulfill
12820 the requirements of the standard for procedures used as finalizers. */
12823 gfc_resolve_finalizers (gfc_symbol
* derived
, bool *finalizable
)
12825 gfc_finalizer
* list
;
12826 gfc_finalizer
** prev_link
; /* For removing wrong entries from the list. */
12827 bool result
= true;
12828 bool seen_scalar
= false;
12831 gfc_symbol
*parent
= gfc_get_derived_super_type (derived
);
12834 gfc_resolve_finalizers (parent
, finalizable
);
12836 /* Ensure that derived-type components have a their finalizers resolved. */
12837 bool has_final
= derived
->f2k_derived
&& derived
->f2k_derived
->finalizers
;
12838 for (c
= derived
->components
; c
; c
= c
->next
)
12839 if (c
->ts
.type
== BT_DERIVED
12840 && !c
->attr
.pointer
&& !c
->attr
.proc_pointer
&& !c
->attr
.allocatable
)
12842 bool has_final2
= false;
12843 if (!gfc_resolve_finalizers (c
->ts
.u
.derived
, &has_final2
))
12844 return false; /* Error. */
12845 has_final
= has_final
|| has_final2
;
12847 /* Return early if not finalizable. */
12851 *finalizable
= false;
12855 /* Walk over the list of finalizer-procedures, check them, and if any one
12856 does not fit in with the standard's definition, print an error and remove
12857 it from the list. */
12858 prev_link
= &derived
->f2k_derived
->finalizers
;
12859 for (list
= derived
->f2k_derived
->finalizers
; list
; list
= *prev_link
)
12861 gfc_formal_arglist
*dummy_args
;
12866 /* Skip this finalizer if we already resolved it. */
12867 if (list
->proc_tree
)
12869 if (list
->proc_tree
->n
.sym
->formal
->sym
->as
== NULL
12870 || list
->proc_tree
->n
.sym
->formal
->sym
->as
->rank
== 0)
12871 seen_scalar
= true;
12872 prev_link
= &(list
->next
);
12876 /* Check this exists and is a SUBROUTINE. */
12877 if (!list
->proc_sym
->attr
.subroutine
)
12879 gfc_error ("FINAL procedure %qs at %L is not a SUBROUTINE",
12880 list
->proc_sym
->name
, &list
->where
);
12884 /* We should have exactly one argument. */
12885 dummy_args
= gfc_sym_get_dummy_args (list
->proc_sym
);
12886 if (!dummy_args
|| dummy_args
->next
)
12888 gfc_error ("FINAL procedure at %L must have exactly one argument",
12892 arg
= dummy_args
->sym
;
12894 /* This argument must be of our type. */
12895 if (arg
->ts
.type
!= BT_DERIVED
|| arg
->ts
.u
.derived
!= derived
)
12897 gfc_error ("Argument of FINAL procedure at %L must be of type %qs",
12898 &arg
->declared_at
, derived
->name
);
12902 /* It must neither be a pointer nor allocatable nor optional. */
12903 if (arg
->attr
.pointer
)
12905 gfc_error ("Argument of FINAL procedure at %L must not be a POINTER",
12906 &arg
->declared_at
);
12909 if (arg
->attr
.allocatable
)
12911 gfc_error ("Argument of FINAL procedure at %L must not be"
12912 " ALLOCATABLE", &arg
->declared_at
);
12915 if (arg
->attr
.optional
)
12917 gfc_error ("Argument of FINAL procedure at %L must not be OPTIONAL",
12918 &arg
->declared_at
);
12922 /* It must not be INTENT(OUT). */
12923 if (arg
->attr
.intent
== INTENT_OUT
)
12925 gfc_error ("Argument of FINAL procedure at %L must not be"
12926 " INTENT(OUT)", &arg
->declared_at
);
12930 /* Warn if the procedure is non-scalar and not assumed shape. */
12931 if (warn_surprising
&& arg
->as
&& arg
->as
->rank
!= 0
12932 && arg
->as
->type
!= AS_ASSUMED_SHAPE
)
12933 gfc_warning (OPT_Wsurprising
,
12934 "Non-scalar FINAL procedure at %L should have assumed"
12935 " shape argument", &arg
->declared_at
);
12937 /* Check that it does not match in kind and rank with a FINAL procedure
12938 defined earlier. To really loop over the *earlier* declarations,
12939 we need to walk the tail of the list as new ones were pushed at the
12941 /* TODO: Handle kind parameters once they are implemented. */
12942 my_rank
= (arg
->as
? arg
->as
->rank
: 0);
12943 for (i
= list
->next
; i
; i
= i
->next
)
12945 gfc_formal_arglist
*dummy_args
;
12947 /* Argument list might be empty; that is an error signalled earlier,
12948 but we nevertheless continued resolving. */
12949 dummy_args
= gfc_sym_get_dummy_args (i
->proc_sym
);
12952 gfc_symbol
* i_arg
= dummy_args
->sym
;
12953 const int i_rank
= (i_arg
->as
? i_arg
->as
->rank
: 0);
12954 if (i_rank
== my_rank
)
12956 gfc_error ("FINAL procedure %qs declared at %L has the same"
12957 " rank (%d) as %qs",
12958 list
->proc_sym
->name
, &list
->where
, my_rank
,
12959 i
->proc_sym
->name
);
12965 /* Is this the/a scalar finalizer procedure? */
12967 seen_scalar
= true;
12969 /* Find the symtree for this procedure. */
12970 gcc_assert (!list
->proc_tree
);
12971 list
->proc_tree
= gfc_find_sym_in_symtree (list
->proc_sym
);
12973 prev_link
= &list
->next
;
12976 /* Remove wrong nodes immediately from the list so we don't risk any
12977 troubles in the future when they might fail later expectations. */
12980 *prev_link
= list
->next
;
12981 gfc_free_finalizer (i
);
12985 if (result
== false)
12988 /* Warn if we haven't seen a scalar finalizer procedure (but we know there
12989 were nodes in the list, must have been for arrays. It is surely a good
12990 idea to have a scalar version there if there's something to finalize. */
12991 if (warn_surprising
&& derived
->f2k_derived
->finalizers
&& !seen_scalar
)
12992 gfc_warning (OPT_Wsurprising
,
12993 "Only array FINAL procedures declared for derived type %qs"
12994 " defined at %L, suggest also scalar one",
12995 derived
->name
, &derived
->declared_at
);
12997 vtab
= gfc_find_derived_vtab (derived
);
12998 c
= vtab
->ts
.u
.derived
->components
->next
->next
->next
->next
->next
;
12999 gfc_set_sym_referenced (c
->initializer
->symtree
->n
.sym
);
13002 *finalizable
= true;
13008 /* Check if two GENERIC targets are ambiguous and emit an error is they are. */
13011 check_generic_tbp_ambiguity (gfc_tbp_generic
* t1
, gfc_tbp_generic
* t2
,
13012 const char* generic_name
, locus where
)
13014 gfc_symbol
*sym1
, *sym2
;
13015 const char *pass1
, *pass2
;
13016 gfc_formal_arglist
*dummy_args
;
13018 gcc_assert (t1
->specific
&& t2
->specific
);
13019 gcc_assert (!t1
->specific
->is_generic
);
13020 gcc_assert (!t2
->specific
->is_generic
);
13021 gcc_assert (t1
->is_operator
== t2
->is_operator
);
13023 sym1
= t1
->specific
->u
.specific
->n
.sym
;
13024 sym2
= t2
->specific
->u
.specific
->n
.sym
;
13029 /* Both must be SUBROUTINEs or both must be FUNCTIONs. */
13030 if (sym1
->attr
.subroutine
!= sym2
->attr
.subroutine
13031 || sym1
->attr
.function
!= sym2
->attr
.function
)
13033 gfc_error ("%qs and %qs can't be mixed FUNCTION/SUBROUTINE for"
13034 " GENERIC %qs at %L",
13035 sym1
->name
, sym2
->name
, generic_name
, &where
);
13039 /* Determine PASS arguments. */
13040 if (t1
->specific
->nopass
)
13042 else if (t1
->specific
->pass_arg
)
13043 pass1
= t1
->specific
->pass_arg
;
13046 dummy_args
= gfc_sym_get_dummy_args (t1
->specific
->u
.specific
->n
.sym
);
13048 pass1
= dummy_args
->sym
->name
;
13052 if (t2
->specific
->nopass
)
13054 else if (t2
->specific
->pass_arg
)
13055 pass2
= t2
->specific
->pass_arg
;
13058 dummy_args
= gfc_sym_get_dummy_args (t2
->specific
->u
.specific
->n
.sym
);
13060 pass2
= dummy_args
->sym
->name
;
13065 /* Compare the interfaces. */
13066 if (gfc_compare_interfaces (sym1
, sym2
, sym2
->name
, !t1
->is_operator
, 0,
13067 NULL
, 0, pass1
, pass2
))
13069 gfc_error ("%qs and %qs for GENERIC %qs at %L are ambiguous",
13070 sym1
->name
, sym2
->name
, generic_name
, &where
);
13078 /* Worker function for resolving a generic procedure binding; this is used to
13079 resolve GENERIC as well as user and intrinsic OPERATOR typebound procedures.
13081 The difference between those cases is finding possible inherited bindings
13082 that are overridden, as one has to look for them in tb_sym_root,
13083 tb_uop_root or tb_op, respectively. Thus the caller must already find
13084 the super-type and set p->overridden correctly. */
13087 resolve_tb_generic_targets (gfc_symbol
* super_type
,
13088 gfc_typebound_proc
* p
, const char* name
)
13090 gfc_tbp_generic
* target
;
13091 gfc_symtree
* first_target
;
13092 gfc_symtree
* inherited
;
13094 gcc_assert (p
&& p
->is_generic
);
13096 /* Try to find the specific bindings for the symtrees in our target-list. */
13097 gcc_assert (p
->u
.generic
);
13098 for (target
= p
->u
.generic
; target
; target
= target
->next
)
13099 if (!target
->specific
)
13101 gfc_typebound_proc
* overridden_tbp
;
13102 gfc_tbp_generic
* g
;
13103 const char* target_name
;
13105 target_name
= target
->specific_st
->name
;
13107 /* Defined for this type directly. */
13108 if (target
->specific_st
->n
.tb
&& !target
->specific_st
->n
.tb
->error
)
13110 target
->specific
= target
->specific_st
->n
.tb
;
13111 goto specific_found
;
13114 /* Look for an inherited specific binding. */
13117 inherited
= gfc_find_typebound_proc (super_type
, NULL
, target_name
,
13122 gcc_assert (inherited
->n
.tb
);
13123 target
->specific
= inherited
->n
.tb
;
13124 goto specific_found
;
13128 gfc_error ("Undefined specific binding %qs as target of GENERIC %qs"
13129 " at %L", target_name
, name
, &p
->where
);
13132 /* Once we've found the specific binding, check it is not ambiguous with
13133 other specifics already found or inherited for the same GENERIC. */
13135 gcc_assert (target
->specific
);
13137 /* This must really be a specific binding! */
13138 if (target
->specific
->is_generic
)
13140 gfc_error ("GENERIC %qs at %L must target a specific binding,"
13141 " %qs is GENERIC, too", name
, &p
->where
, target_name
);
13145 /* Check those already resolved on this type directly. */
13146 for (g
= p
->u
.generic
; g
; g
= g
->next
)
13147 if (g
!= target
&& g
->specific
13148 && !check_generic_tbp_ambiguity (target
, g
, name
, p
->where
))
13151 /* Check for ambiguity with inherited specific targets. */
13152 for (overridden_tbp
= p
->overridden
; overridden_tbp
;
13153 overridden_tbp
= overridden_tbp
->overridden
)
13154 if (overridden_tbp
->is_generic
)
13156 for (g
= overridden_tbp
->u
.generic
; g
; g
= g
->next
)
13158 gcc_assert (g
->specific
);
13159 if (!check_generic_tbp_ambiguity (target
, g
, name
, p
->where
))
13165 /* If we attempt to "overwrite" a specific binding, this is an error. */
13166 if (p
->overridden
&& !p
->overridden
->is_generic
)
13168 gfc_error ("GENERIC %qs at %L can't overwrite specific binding with"
13169 " the same name", name
, &p
->where
);
13173 /* Take the SUBROUTINE/FUNCTION attributes of the first specific target, as
13174 all must have the same attributes here. */
13175 first_target
= p
->u
.generic
->specific
->u
.specific
;
13176 gcc_assert (first_target
);
13177 p
->subroutine
= first_target
->n
.sym
->attr
.subroutine
;
13178 p
->function
= first_target
->n
.sym
->attr
.function
;
13184 /* Resolve a GENERIC procedure binding for a derived type. */
13187 resolve_typebound_generic (gfc_symbol
* derived
, gfc_symtree
* st
)
13189 gfc_symbol
* super_type
;
13191 /* Find the overridden binding if any. */
13192 st
->n
.tb
->overridden
= NULL
;
13193 super_type
= gfc_get_derived_super_type (derived
);
13196 gfc_symtree
* overridden
;
13197 overridden
= gfc_find_typebound_proc (super_type
, NULL
, st
->name
,
13200 if (overridden
&& overridden
->n
.tb
)
13201 st
->n
.tb
->overridden
= overridden
->n
.tb
;
13204 /* Resolve using worker function. */
13205 return resolve_tb_generic_targets (super_type
, st
->n
.tb
, st
->name
);
13209 /* Retrieve the target-procedure of an operator binding and do some checks in
13210 common for intrinsic and user-defined type-bound operators. */
13213 get_checked_tb_operator_target (gfc_tbp_generic
* target
, locus where
)
13215 gfc_symbol
* target_proc
;
13217 gcc_assert (target
->specific
&& !target
->specific
->is_generic
);
13218 target_proc
= target
->specific
->u
.specific
->n
.sym
;
13219 gcc_assert (target_proc
);
13221 /* F08:C468. All operator bindings must have a passed-object dummy argument. */
13222 if (target
->specific
->nopass
)
13224 gfc_error ("Type-bound operator at %L can't be NOPASS", &where
);
13228 return target_proc
;
13232 /* Resolve a type-bound intrinsic operator. */
13235 resolve_typebound_intrinsic_op (gfc_symbol
* derived
, gfc_intrinsic_op op
,
13236 gfc_typebound_proc
* p
)
13238 gfc_symbol
* super_type
;
13239 gfc_tbp_generic
* target
;
13241 /* If there's already an error here, do nothing (but don't fail again). */
13245 /* Operators should always be GENERIC bindings. */
13246 gcc_assert (p
->is_generic
);
13248 /* Look for an overridden binding. */
13249 super_type
= gfc_get_derived_super_type (derived
);
13250 if (super_type
&& super_type
->f2k_derived
)
13251 p
->overridden
= gfc_find_typebound_intrinsic_op (super_type
, NULL
,
13254 p
->overridden
= NULL
;
13256 /* Resolve general GENERIC properties using worker function. */
13257 if (!resolve_tb_generic_targets (super_type
, p
, gfc_op2string(op
)))
13260 /* Check the targets to be procedures of correct interface. */
13261 for (target
= p
->u
.generic
; target
; target
= target
->next
)
13263 gfc_symbol
* target_proc
;
13265 target_proc
= get_checked_tb_operator_target (target
, p
->where
);
13269 if (!gfc_check_operator_interface (target_proc
, op
, p
->where
))
13272 /* Add target to non-typebound operator list. */
13273 if (!target
->specific
->deferred
&& !derived
->attr
.use_assoc
13274 && p
->access
!= ACCESS_PRIVATE
&& derived
->ns
== gfc_current_ns
)
13276 gfc_interface
*head
, *intr
;
13278 /* Preempt 'gfc_check_new_interface' for submodules, where the
13279 mechanism for handling module procedures winds up resolving
13280 operator interfaces twice and would otherwise cause an error. */
13281 for (intr
= derived
->ns
->op
[op
]; intr
; intr
= intr
->next
)
13282 if (intr
->sym
== target_proc
13283 && target_proc
->attr
.used_in_submodule
)
13286 if (!gfc_check_new_interface (derived
->ns
->op
[op
],
13287 target_proc
, p
->where
))
13289 head
= derived
->ns
->op
[op
];
13290 intr
= gfc_get_interface ();
13291 intr
->sym
= target_proc
;
13292 intr
->where
= p
->where
;
13294 derived
->ns
->op
[op
] = intr
;
13306 /* Resolve a type-bound user operator (tree-walker callback). */
13308 static gfc_symbol
* resolve_bindings_derived
;
13309 static bool resolve_bindings_result
;
13311 static bool check_uop_procedure (gfc_symbol
* sym
, locus where
);
13314 resolve_typebound_user_op (gfc_symtree
* stree
)
13316 gfc_symbol
* super_type
;
13317 gfc_tbp_generic
* target
;
13319 gcc_assert (stree
&& stree
->n
.tb
);
13321 if (stree
->n
.tb
->error
)
13324 /* Operators should always be GENERIC bindings. */
13325 gcc_assert (stree
->n
.tb
->is_generic
);
13327 /* Find overridden procedure, if any. */
13328 super_type
= gfc_get_derived_super_type (resolve_bindings_derived
);
13329 if (super_type
&& super_type
->f2k_derived
)
13331 gfc_symtree
* overridden
;
13332 overridden
= gfc_find_typebound_user_op (super_type
, NULL
,
13333 stree
->name
, true, NULL
);
13335 if (overridden
&& overridden
->n
.tb
)
13336 stree
->n
.tb
->overridden
= overridden
->n
.tb
;
13339 stree
->n
.tb
->overridden
= NULL
;
13341 /* Resolve basically using worker function. */
13342 if (!resolve_tb_generic_targets (super_type
, stree
->n
.tb
, stree
->name
))
13345 /* Check the targets to be functions of correct interface. */
13346 for (target
= stree
->n
.tb
->u
.generic
; target
; target
= target
->next
)
13348 gfc_symbol
* target_proc
;
13350 target_proc
= get_checked_tb_operator_target (target
, stree
->n
.tb
->where
);
13354 if (!check_uop_procedure (target_proc
, stree
->n
.tb
->where
))
13361 resolve_bindings_result
= false;
13362 stree
->n
.tb
->error
= 1;
13366 /* Resolve the type-bound procedures for a derived type. */
13369 resolve_typebound_procedure (gfc_symtree
* stree
)
13373 gfc_symbol
* me_arg
;
13374 gfc_symbol
* super_type
;
13375 gfc_component
* comp
;
13377 gcc_assert (stree
);
13379 /* Undefined specific symbol from GENERIC target definition. */
13383 if (stree
->n
.tb
->error
)
13386 /* If this is a GENERIC binding, use that routine. */
13387 if (stree
->n
.tb
->is_generic
)
13389 if (!resolve_typebound_generic (resolve_bindings_derived
, stree
))
13394 /* Get the target-procedure to check it. */
13395 gcc_assert (!stree
->n
.tb
->is_generic
);
13396 gcc_assert (stree
->n
.tb
->u
.specific
);
13397 proc
= stree
->n
.tb
->u
.specific
->n
.sym
;
13398 where
= stree
->n
.tb
->where
;
13400 /* Default access should already be resolved from the parser. */
13401 gcc_assert (stree
->n
.tb
->access
!= ACCESS_UNKNOWN
);
13403 if (stree
->n
.tb
->deferred
)
13405 if (!check_proc_interface (proc
, &where
))
13410 /* Check for F08:C465. */
13411 if ((!proc
->attr
.subroutine
&& !proc
->attr
.function
)
13412 || (proc
->attr
.proc
!= PROC_MODULE
13413 && proc
->attr
.if_source
!= IFSRC_IFBODY
)
13414 || proc
->attr
.abstract
)
13416 gfc_error ("%qs must be a module procedure or an external procedure with"
13417 " an explicit interface at %L", proc
->name
, &where
);
13422 stree
->n
.tb
->subroutine
= proc
->attr
.subroutine
;
13423 stree
->n
.tb
->function
= proc
->attr
.function
;
13425 /* Find the super-type of the current derived type. We could do this once and
13426 store in a global if speed is needed, but as long as not I believe this is
13427 more readable and clearer. */
13428 super_type
= gfc_get_derived_super_type (resolve_bindings_derived
);
13430 /* If PASS, resolve and check arguments if not already resolved / loaded
13431 from a .mod file. */
13432 if (!stree
->n
.tb
->nopass
&& stree
->n
.tb
->pass_arg_num
== 0)
13434 gfc_formal_arglist
*dummy_args
;
13436 dummy_args
= gfc_sym_get_dummy_args (proc
);
13437 if (stree
->n
.tb
->pass_arg
)
13439 gfc_formal_arglist
*i
;
13441 /* If an explicit passing argument name is given, walk the arg-list
13442 and look for it. */
13445 stree
->n
.tb
->pass_arg_num
= 1;
13446 for (i
= dummy_args
; i
; i
= i
->next
)
13448 if (!strcmp (i
->sym
->name
, stree
->n
.tb
->pass_arg
))
13453 ++stree
->n
.tb
->pass_arg_num
;
13458 gfc_error ("Procedure %qs with PASS(%s) at %L has no"
13460 proc
->name
, stree
->n
.tb
->pass_arg
, &where
,
13461 stree
->n
.tb
->pass_arg
);
13467 /* Otherwise, take the first one; there should in fact be at least
13469 stree
->n
.tb
->pass_arg_num
= 1;
13472 gfc_error ("Procedure %qs with PASS at %L must have at"
13473 " least one argument", proc
->name
, &where
);
13476 me_arg
= dummy_args
->sym
;
13479 /* Now check that the argument-type matches and the passed-object
13480 dummy argument is generally fine. */
13482 gcc_assert (me_arg
);
13484 if (me_arg
->ts
.type
!= BT_CLASS
)
13486 gfc_error ("Non-polymorphic passed-object dummy argument of %qs"
13487 " at %L", proc
->name
, &where
);
13491 if (CLASS_DATA (me_arg
)->ts
.u
.derived
13492 != resolve_bindings_derived
)
13494 gfc_error ("Argument %qs of %qs with PASS(%s) at %L must be of"
13495 " the derived-type %qs", me_arg
->name
, proc
->name
,
13496 me_arg
->name
, &where
, resolve_bindings_derived
->name
);
13500 gcc_assert (me_arg
->ts
.type
== BT_CLASS
);
13501 if (CLASS_DATA (me_arg
)->as
&& CLASS_DATA (me_arg
)->as
->rank
!= 0)
13503 gfc_error ("Passed-object dummy argument of %qs at %L must be"
13504 " scalar", proc
->name
, &where
);
13507 if (CLASS_DATA (me_arg
)->attr
.allocatable
)
13509 gfc_error ("Passed-object dummy argument of %qs at %L must not"
13510 " be ALLOCATABLE", proc
->name
, &where
);
13513 if (CLASS_DATA (me_arg
)->attr
.class_pointer
)
13515 gfc_error ("Passed-object dummy argument of %qs at %L must not"
13516 " be POINTER", proc
->name
, &where
);
13521 /* If we are extending some type, check that we don't override a procedure
13522 flagged NON_OVERRIDABLE. */
13523 stree
->n
.tb
->overridden
= NULL
;
13526 gfc_symtree
* overridden
;
13527 overridden
= gfc_find_typebound_proc (super_type
, NULL
,
13528 stree
->name
, true, NULL
);
13532 if (overridden
->n
.tb
)
13533 stree
->n
.tb
->overridden
= overridden
->n
.tb
;
13535 if (!gfc_check_typebound_override (stree
, overridden
))
13540 /* See if there's a name collision with a component directly in this type. */
13541 for (comp
= resolve_bindings_derived
->components
; comp
; comp
= comp
->next
)
13542 if (!strcmp (comp
->name
, stree
->name
))
13544 gfc_error ("Procedure %qs at %L has the same name as a component of"
13546 stree
->name
, &where
, resolve_bindings_derived
->name
);
13550 /* Try to find a name collision with an inherited component. */
13551 if (super_type
&& gfc_find_component (super_type
, stree
->name
, true, true,
13554 gfc_error ("Procedure %qs at %L has the same name as an inherited"
13555 " component of %qs",
13556 stree
->name
, &where
, resolve_bindings_derived
->name
);
13560 stree
->n
.tb
->error
= 0;
13564 resolve_bindings_result
= false;
13565 stree
->n
.tb
->error
= 1;
13570 resolve_typebound_procedures (gfc_symbol
* derived
)
13573 gfc_symbol
* super_type
;
13575 if (!derived
->f2k_derived
|| !derived
->f2k_derived
->tb_sym_root
)
13578 super_type
= gfc_get_derived_super_type (derived
);
13580 resolve_symbol (super_type
);
13582 resolve_bindings_derived
= derived
;
13583 resolve_bindings_result
= true;
13585 if (derived
->f2k_derived
->tb_sym_root
)
13586 gfc_traverse_symtree (derived
->f2k_derived
->tb_sym_root
,
13587 &resolve_typebound_procedure
);
13589 if (derived
->f2k_derived
->tb_uop_root
)
13590 gfc_traverse_symtree (derived
->f2k_derived
->tb_uop_root
,
13591 &resolve_typebound_user_op
);
13593 for (op
= 0; op
!= GFC_INTRINSIC_OPS
; ++op
)
13595 gfc_typebound_proc
* p
= derived
->f2k_derived
->tb_op
[op
];
13596 if (p
&& !resolve_typebound_intrinsic_op (derived
,
13597 (gfc_intrinsic_op
)op
, p
))
13598 resolve_bindings_result
= false;
13601 return resolve_bindings_result
;
13605 /* Add a derived type to the dt_list. The dt_list is used in trans-types.c
13606 to give all identical derived types the same backend_decl. */
13608 add_dt_to_dt_list (gfc_symbol
*derived
)
13610 if (!derived
->dt_next
)
13612 if (gfc_derived_types
)
13614 derived
->dt_next
= gfc_derived_types
->dt_next
;
13615 gfc_derived_types
->dt_next
= derived
;
13619 derived
->dt_next
= derived
;
13621 gfc_derived_types
= derived
;
13626 /* Ensure that a derived-type is really not abstract, meaning that every
13627 inherited DEFERRED binding is overridden by a non-DEFERRED one. */
13630 ensure_not_abstract_walker (gfc_symbol
* sub
, gfc_symtree
* st
)
13635 if (!ensure_not_abstract_walker (sub
, st
->left
))
13637 if (!ensure_not_abstract_walker (sub
, st
->right
))
13640 if (st
->n
.tb
&& st
->n
.tb
->deferred
)
13642 gfc_symtree
* overriding
;
13643 overriding
= gfc_find_typebound_proc (sub
, NULL
, st
->name
, true, NULL
);
13646 gcc_assert (overriding
->n
.tb
);
13647 if (overriding
->n
.tb
->deferred
)
13649 gfc_error ("Derived-type %qs declared at %L must be ABSTRACT because"
13650 " %qs is DEFERRED and not overridden",
13651 sub
->name
, &sub
->declared_at
, st
->name
);
13660 ensure_not_abstract (gfc_symbol
* sub
, gfc_symbol
* ancestor
)
13662 /* The algorithm used here is to recursively travel up the ancestry of sub
13663 and for each ancestor-type, check all bindings. If any of them is
13664 DEFERRED, look it up starting from sub and see if the found (overriding)
13665 binding is not DEFERRED.
13666 This is not the most efficient way to do this, but it should be ok and is
13667 clearer than something sophisticated. */
13669 gcc_assert (ancestor
&& !sub
->attr
.abstract
);
13671 if (!ancestor
->attr
.abstract
)
13674 /* Walk bindings of this ancestor. */
13675 if (ancestor
->f2k_derived
)
13678 t
= ensure_not_abstract_walker (sub
, ancestor
->f2k_derived
->tb_sym_root
);
13683 /* Find next ancestor type and recurse on it. */
13684 ancestor
= gfc_get_derived_super_type (ancestor
);
13686 return ensure_not_abstract (sub
, ancestor
);
13692 /* This check for typebound defined assignments is done recursively
13693 since the order in which derived types are resolved is not always in
13694 order of the declarations. */
13697 check_defined_assignments (gfc_symbol
*derived
)
13701 for (c
= derived
->components
; c
; c
= c
->next
)
13703 if (!gfc_bt_struct (c
->ts
.type
)
13705 || c
->attr
.allocatable
13706 || c
->attr
.proc_pointer_comp
13707 || c
->attr
.class_pointer
13708 || c
->attr
.proc_pointer
)
13711 if (c
->ts
.u
.derived
->attr
.defined_assign_comp
13712 || (c
->ts
.u
.derived
->f2k_derived
13713 && c
->ts
.u
.derived
->f2k_derived
->tb_op
[INTRINSIC_ASSIGN
]))
13715 derived
->attr
.defined_assign_comp
= 1;
13719 check_defined_assignments (c
->ts
.u
.derived
);
13720 if (c
->ts
.u
.derived
->attr
.defined_assign_comp
)
13722 derived
->attr
.defined_assign_comp
= 1;
13729 /* Resolve a single component of a derived type or structure. */
13732 resolve_component (gfc_component
*c
, gfc_symbol
*sym
)
13734 gfc_symbol
*super_type
;
13736 if (c
->attr
.artificial
)
13739 /* Do not allow vtype components to be resolved in nameless namespaces
13740 such as block data because the procedure pointers will cause ICEs
13741 and vtables are not needed in these contexts. */
13742 if (sym
->attr
.vtype
&& sym
->attr
.use_assoc
13743 && sym
->ns
->proc_name
== NULL
)
13747 if ((!sym
->attr
.is_class
|| c
!= sym
->components
)
13748 && c
->attr
.codimension
13749 && (!c
->attr
.allocatable
|| (c
->as
&& c
->as
->type
!= AS_DEFERRED
)))
13751 gfc_error ("Coarray component %qs at %L must be allocatable with "
13752 "deferred shape", c
->name
, &c
->loc
);
13757 if (c
->attr
.codimension
&& c
->ts
.type
== BT_DERIVED
13758 && c
->ts
.u
.derived
->ts
.is_iso_c
)
13760 gfc_error ("Component %qs at %L of TYPE(C_PTR) or TYPE(C_FUNPTR) "
13761 "shall not be a coarray", c
->name
, &c
->loc
);
13766 if (gfc_bt_struct (c
->ts
.type
) && c
->ts
.u
.derived
->attr
.coarray_comp
13767 && (c
->attr
.codimension
|| c
->attr
.pointer
|| c
->attr
.dimension
13768 || c
->attr
.allocatable
))
13770 gfc_error ("Component %qs at %L with coarray component "
13771 "shall be a nonpointer, nonallocatable scalar",
13777 if (c
->attr
.contiguous
&& (!c
->attr
.dimension
|| !c
->attr
.pointer
))
13779 gfc_error ("Component %qs at %L has the CONTIGUOUS attribute but "
13780 "is not an array pointer", c
->name
, &c
->loc
);
13784 /* F2003, 15.2.1 - length has to be one. */
13785 if (sym
->attr
.is_bind_c
&& c
->ts
.type
== BT_CHARACTER
13786 && (c
->ts
.u
.cl
== NULL
|| c
->ts
.u
.cl
->length
== NULL
13787 || !gfc_is_constant_expr (c
->ts
.u
.cl
->length
)
13788 || mpz_cmp_si (c
->ts
.u
.cl
->length
->value
.integer
, 1) != 0))
13790 gfc_error ("Component %qs of BIND(C) type at %L must have length one",
13795 if (c
->attr
.proc_pointer
&& c
->ts
.interface
)
13797 gfc_symbol
*ifc
= c
->ts
.interface
;
13799 if (!sym
->attr
.vtype
&& !check_proc_interface (ifc
, &c
->loc
))
13805 if (ifc
->attr
.if_source
|| ifc
->attr
.intrinsic
)
13807 /* Resolve interface and copy attributes. */
13808 if (ifc
->formal
&& !ifc
->formal_ns
)
13809 resolve_symbol (ifc
);
13810 if (ifc
->attr
.intrinsic
)
13811 gfc_resolve_intrinsic (ifc
, &ifc
->declared_at
);
13815 c
->ts
= ifc
->result
->ts
;
13816 c
->attr
.allocatable
= ifc
->result
->attr
.allocatable
;
13817 c
->attr
.pointer
= ifc
->result
->attr
.pointer
;
13818 c
->attr
.dimension
= ifc
->result
->attr
.dimension
;
13819 c
->as
= gfc_copy_array_spec (ifc
->result
->as
);
13820 c
->attr
.class_ok
= ifc
->result
->attr
.class_ok
;
13825 c
->attr
.allocatable
= ifc
->attr
.allocatable
;
13826 c
->attr
.pointer
= ifc
->attr
.pointer
;
13827 c
->attr
.dimension
= ifc
->attr
.dimension
;
13828 c
->as
= gfc_copy_array_spec (ifc
->as
);
13829 c
->attr
.class_ok
= ifc
->attr
.class_ok
;
13831 c
->ts
.interface
= ifc
;
13832 c
->attr
.function
= ifc
->attr
.function
;
13833 c
->attr
.subroutine
= ifc
->attr
.subroutine
;
13835 c
->attr
.pure
= ifc
->attr
.pure
;
13836 c
->attr
.elemental
= ifc
->attr
.elemental
;
13837 c
->attr
.recursive
= ifc
->attr
.recursive
;
13838 c
->attr
.always_explicit
= ifc
->attr
.always_explicit
;
13839 c
->attr
.ext_attr
|= ifc
->attr
.ext_attr
;
13840 /* Copy char length. */
13841 if (ifc
->ts
.type
== BT_CHARACTER
&& ifc
->ts
.u
.cl
)
13843 gfc_charlen
*cl
= gfc_new_charlen (sym
->ns
, ifc
->ts
.u
.cl
);
13844 if (cl
->length
&& !cl
->resolved
13845 && !gfc_resolve_expr (cl
->length
))
13854 else if (c
->attr
.proc_pointer
&& c
->ts
.type
== BT_UNKNOWN
)
13856 /* Since PPCs are not implicitly typed, a PPC without an explicit
13857 interface must be a subroutine. */
13858 gfc_add_subroutine (&c
->attr
, c
->name
, &c
->loc
);
13861 /* Procedure pointer components: Check PASS arg. */
13862 if (c
->attr
.proc_pointer
&& !c
->tb
->nopass
&& c
->tb
->pass_arg_num
== 0
13863 && !sym
->attr
.vtype
)
13865 gfc_symbol
* me_arg
;
13867 if (c
->tb
->pass_arg
)
13869 gfc_formal_arglist
* i
;
13871 /* If an explicit passing argument name is given, walk the arg-list
13872 and look for it. */
13875 c
->tb
->pass_arg_num
= 1;
13876 for (i
= c
->ts
.interface
->formal
; i
; i
= i
->next
)
13878 if (!strcmp (i
->sym
->name
, c
->tb
->pass_arg
))
13883 c
->tb
->pass_arg_num
++;
13888 gfc_error ("Procedure pointer component %qs with PASS(%s) "
13889 "at %L has no argument %qs", c
->name
,
13890 c
->tb
->pass_arg
, &c
->loc
, c
->tb
->pass_arg
);
13897 /* Otherwise, take the first one; there should in fact be at least
13899 c
->tb
->pass_arg_num
= 1;
13900 if (!c
->ts
.interface
->formal
)
13902 gfc_error ("Procedure pointer component %qs with PASS at %L "
13903 "must have at least one argument",
13908 me_arg
= c
->ts
.interface
->formal
->sym
;
13911 /* Now check that the argument-type matches. */
13912 gcc_assert (me_arg
);
13913 if ((me_arg
->ts
.type
!= BT_DERIVED
&& me_arg
->ts
.type
!= BT_CLASS
)
13914 || (me_arg
->ts
.type
== BT_DERIVED
&& me_arg
->ts
.u
.derived
!= sym
)
13915 || (me_arg
->ts
.type
== BT_CLASS
13916 && CLASS_DATA (me_arg
)->ts
.u
.derived
!= sym
))
13918 gfc_error ("Argument %qs of %qs with PASS(%s) at %L must be of"
13919 " the derived type %qs", me_arg
->name
, c
->name
,
13920 me_arg
->name
, &c
->loc
, sym
->name
);
13925 /* Check for F03:C453. */
13926 if (CLASS_DATA (me_arg
)->attr
.dimension
)
13928 gfc_error ("Argument %qs of %qs with PASS(%s) at %L "
13929 "must be scalar", me_arg
->name
, c
->name
, me_arg
->name
,
13935 if (CLASS_DATA (me_arg
)->attr
.class_pointer
)
13937 gfc_error ("Argument %qs of %qs with PASS(%s) at %L "
13938 "may not have the POINTER attribute", me_arg
->name
,
13939 c
->name
, me_arg
->name
, &c
->loc
);
13944 if (CLASS_DATA (me_arg
)->attr
.allocatable
)
13946 gfc_error ("Argument %qs of %qs with PASS(%s) at %L "
13947 "may not be ALLOCATABLE", me_arg
->name
, c
->name
,
13948 me_arg
->name
, &c
->loc
);
13953 if (gfc_type_is_extensible (sym
) && me_arg
->ts
.type
!= BT_CLASS
)
13955 gfc_error ("Non-polymorphic passed-object dummy argument of %qs"
13956 " at %L", c
->name
, &c
->loc
);
13962 /* Check type-spec if this is not the parent-type component. */
13963 if (((sym
->attr
.is_class
13964 && (!sym
->components
->ts
.u
.derived
->attr
.extension
13965 || c
!= sym
->components
->ts
.u
.derived
->components
))
13966 || (!sym
->attr
.is_class
13967 && (!sym
->attr
.extension
|| c
!= sym
->components
)))
13968 && !sym
->attr
.vtype
13969 && !resolve_typespec_used (&c
->ts
, &c
->loc
, c
->name
))
13972 super_type
= gfc_get_derived_super_type (sym
);
13974 /* If this type is an extension, set the accessibility of the parent
13977 && ((sym
->attr
.is_class
13978 && c
== sym
->components
->ts
.u
.derived
->components
)
13979 || (!sym
->attr
.is_class
&& c
== sym
->components
))
13980 && strcmp (super_type
->name
, c
->name
) == 0)
13981 c
->attr
.access
= super_type
->attr
.access
;
13983 /* If this type is an extension, see if this component has the same name
13984 as an inherited type-bound procedure. */
13985 if (super_type
&& !sym
->attr
.is_class
13986 && gfc_find_typebound_proc (super_type
, NULL
, c
->name
, true, NULL
))
13988 gfc_error ("Component %qs of %qs at %L has the same name as an"
13989 " inherited type-bound procedure",
13990 c
->name
, sym
->name
, &c
->loc
);
13994 if (c
->ts
.type
== BT_CHARACTER
&& !c
->attr
.proc_pointer
13995 && !c
->ts
.deferred
)
13997 if (c
->ts
.u
.cl
->length
== NULL
13998 || (!resolve_charlen(c
->ts
.u
.cl
))
13999 || !gfc_is_constant_expr (c
->ts
.u
.cl
->length
))
14001 gfc_error ("Character length of component %qs needs to "
14002 "be a constant specification expression at %L",
14004 c
->ts
.u
.cl
->length
? &c
->ts
.u
.cl
->length
->where
: &c
->loc
);
14009 if (c
->ts
.type
== BT_CHARACTER
&& c
->ts
.deferred
14010 && !c
->attr
.pointer
&& !c
->attr
.allocatable
)
14012 gfc_error ("Character component %qs of %qs at %L with deferred "
14013 "length must be a POINTER or ALLOCATABLE",
14014 c
->name
, sym
->name
, &c
->loc
);
14018 /* Add the hidden deferred length field. */
14019 if (c
->ts
.type
== BT_CHARACTER
14020 && (c
->ts
.deferred
|| c
->attr
.pdt_string
)
14021 && !c
->attr
.function
14022 && !sym
->attr
.is_class
)
14024 char name
[GFC_MAX_SYMBOL_LEN
+9];
14025 gfc_component
*strlen
;
14026 sprintf (name
, "_%s_length", c
->name
);
14027 strlen
= gfc_find_component (sym
, name
, true, true, NULL
);
14028 if (strlen
== NULL
)
14030 if (!gfc_add_component (sym
, name
, &strlen
))
14032 strlen
->ts
.type
= BT_INTEGER
;
14033 strlen
->ts
.kind
= gfc_charlen_int_kind
;
14034 strlen
->attr
.access
= ACCESS_PRIVATE
;
14035 strlen
->attr
.artificial
= 1;
14039 if (c
->ts
.type
== BT_DERIVED
14040 && sym
->component_access
!= ACCESS_PRIVATE
14041 && gfc_check_symbol_access (sym
)
14042 && !is_sym_host_assoc (c
->ts
.u
.derived
, sym
->ns
)
14043 && !c
->ts
.u
.derived
->attr
.use_assoc
14044 && !gfc_check_symbol_access (c
->ts
.u
.derived
)
14045 && !gfc_notify_std (GFC_STD_F2003
, "the component %qs is a "
14046 "PRIVATE type and cannot be a component of "
14047 "%qs, which is PUBLIC at %L", c
->name
,
14048 sym
->name
, &sym
->declared_at
))
14051 if ((sym
->attr
.sequence
|| sym
->attr
.is_bind_c
) && c
->ts
.type
== BT_CLASS
)
14053 gfc_error ("Polymorphic component %s at %L in SEQUENCE or BIND(C) "
14054 "type %s", c
->name
, &c
->loc
, sym
->name
);
14058 if (sym
->attr
.sequence
)
14060 if (c
->ts
.type
== BT_DERIVED
&& c
->ts
.u
.derived
->attr
.sequence
== 0)
14062 gfc_error ("Component %s of SEQUENCE type declared at %L does "
14063 "not have the SEQUENCE attribute",
14064 c
->ts
.u
.derived
->name
, &sym
->declared_at
);
14069 if (c
->ts
.type
== BT_DERIVED
&& c
->ts
.u
.derived
->attr
.generic
)
14070 c
->ts
.u
.derived
= gfc_find_dt_in_generic (c
->ts
.u
.derived
);
14071 else if (c
->ts
.type
== BT_CLASS
&& c
->attr
.class_ok
14072 && CLASS_DATA (c
)->ts
.u
.derived
->attr
.generic
)
14073 CLASS_DATA (c
)->ts
.u
.derived
14074 = gfc_find_dt_in_generic (CLASS_DATA (c
)->ts
.u
.derived
);
14076 /* If an allocatable component derived type is of the same type as
14077 the enclosing derived type, we need a vtable generating so that
14078 the __deallocate procedure is created. */
14079 if ((c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
14080 && c
->ts
.u
.derived
== sym
&& c
->attr
.allocatable
== 1)
14081 gfc_find_vtab (&c
->ts
);
14083 /* Ensure that all the derived type components are put on the
14084 derived type list; even in formal namespaces, where derived type
14085 pointer components might not have been declared. */
14086 if (c
->ts
.type
== BT_DERIVED
14088 && c
->ts
.u
.derived
->components
14090 && sym
!= c
->ts
.u
.derived
)
14091 add_dt_to_dt_list (c
->ts
.u
.derived
);
14093 if (!gfc_resolve_array_spec (c
->as
,
14094 !(c
->attr
.pointer
|| c
->attr
.proc_pointer
14095 || c
->attr
.allocatable
)))
14098 if (c
->initializer
&& !sym
->attr
.vtype
14099 && !c
->attr
.pdt_kind
&& !c
->attr
.pdt_len
14100 && !gfc_check_assign_symbol (sym
, c
, c
->initializer
))
14107 /* Be nice about the locus for a structure expression - show the locus of the
14108 first non-null sub-expression if we can. */
14111 cons_where (gfc_expr
*struct_expr
)
14113 gfc_constructor
*cons
;
14115 gcc_assert (struct_expr
&& struct_expr
->expr_type
== EXPR_STRUCTURE
);
14117 cons
= gfc_constructor_first (struct_expr
->value
.constructor
);
14118 for (; cons
; cons
= gfc_constructor_next (cons
))
14120 if (cons
->expr
&& cons
->expr
->expr_type
!= EXPR_NULL
)
14121 return &cons
->expr
->where
;
14124 return &struct_expr
->where
;
14127 /* Resolve the components of a structure type. Much less work than derived
14131 resolve_fl_struct (gfc_symbol
*sym
)
14134 gfc_expr
*init
= NULL
;
14137 /* Make sure UNIONs do not have overlapping initializers. */
14138 if (sym
->attr
.flavor
== FL_UNION
)
14140 for (c
= sym
->components
; c
; c
= c
->next
)
14142 if (init
&& c
->initializer
)
14144 gfc_error ("Conflicting initializers in union at %L and %L",
14145 cons_where (init
), cons_where (c
->initializer
));
14146 gfc_free_expr (c
->initializer
);
14147 c
->initializer
= NULL
;
14150 init
= c
->initializer
;
14155 for (c
= sym
->components
; c
; c
= c
->next
)
14156 if (!resolve_component (c
, sym
))
14162 if (sym
->components
)
14163 add_dt_to_dt_list (sym
);
14169 /* Resolve the components of a derived type. This does not have to wait until
14170 resolution stage, but can be done as soon as the dt declaration has been
14174 resolve_fl_derived0 (gfc_symbol
*sym
)
14176 gfc_symbol
* super_type
;
14178 gfc_formal_arglist
*f
;
14181 if (sym
->attr
.unlimited_polymorphic
)
14184 super_type
= gfc_get_derived_super_type (sym
);
14187 if (super_type
&& sym
->attr
.coarray_comp
&& !super_type
->attr
.coarray_comp
)
14189 gfc_error ("As extending type %qs at %L has a coarray component, "
14190 "parent type %qs shall also have one", sym
->name
,
14191 &sym
->declared_at
, super_type
->name
);
14195 /* Ensure the extended type gets resolved before we do. */
14196 if (super_type
&& !resolve_fl_derived0 (super_type
))
14199 /* An ABSTRACT type must be extensible. */
14200 if (sym
->attr
.abstract
&& !gfc_type_is_extensible (sym
))
14202 gfc_error ("Non-extensible derived-type %qs at %L must not be ABSTRACT",
14203 sym
->name
, &sym
->declared_at
);
14207 c
= (sym
->attr
.is_class
) ? sym
->components
->ts
.u
.derived
->components
14211 for ( ; c
!= NULL
; c
= c
->next
)
14212 if (!resolve_component (c
, sym
))
14218 /* Now add the caf token field, where needed. */
14219 if (flag_coarray
!= GFC_FCOARRAY_NONE
14220 && !sym
->attr
.is_class
&& !sym
->attr
.vtype
)
14222 for (c
= sym
->components
; c
; c
= c
->next
)
14223 if (!c
->attr
.dimension
&& !c
->attr
.codimension
14224 && (c
->attr
.allocatable
|| c
->attr
.pointer
))
14226 char name
[GFC_MAX_SYMBOL_LEN
+9];
14227 gfc_component
*token
;
14228 sprintf (name
, "_caf_%s", c
->name
);
14229 token
= gfc_find_component (sym
, name
, true, true, NULL
);
14232 if (!gfc_add_component (sym
, name
, &token
))
14234 token
->ts
.type
= BT_VOID
;
14235 token
->ts
.kind
= gfc_default_integer_kind
;
14236 token
->attr
.access
= ACCESS_PRIVATE
;
14237 token
->attr
.artificial
= 1;
14238 token
->attr
.caf_token
= 1;
14243 check_defined_assignments (sym
);
14245 if (!sym
->attr
.defined_assign_comp
&& super_type
)
14246 sym
->attr
.defined_assign_comp
14247 = super_type
->attr
.defined_assign_comp
;
14249 /* If this is a non-ABSTRACT type extending an ABSTRACT one, ensure that
14250 all DEFERRED bindings are overridden. */
14251 if (super_type
&& super_type
->attr
.abstract
&& !sym
->attr
.abstract
14252 && !sym
->attr
.is_class
14253 && !ensure_not_abstract (sym
, super_type
))
14256 /* Check that there is a component for every PDT parameter. */
14257 if (sym
->attr
.pdt_template
)
14259 for (f
= sym
->formal
; f
; f
= f
->next
)
14263 c
= gfc_find_component (sym
, f
->sym
->name
, true, true, NULL
);
14266 gfc_error ("Parameterized type %qs does not have a component "
14267 "corresponding to parameter %qs at %L", sym
->name
,
14268 f
->sym
->name
, &sym
->declared_at
);
14274 /* Add derived type to the derived type list. */
14275 add_dt_to_dt_list (sym
);
14281 /* The following procedure does the full resolution of a derived type,
14282 including resolution of all type-bound procedures (if present). In contrast
14283 to 'resolve_fl_derived0' this can only be done after the module has been
14284 parsed completely. */
14287 resolve_fl_derived (gfc_symbol
*sym
)
14289 gfc_symbol
*gen_dt
= NULL
;
14291 if (sym
->attr
.unlimited_polymorphic
)
14294 if (!sym
->attr
.is_class
)
14295 gfc_find_symbol (sym
->name
, sym
->ns
, 0, &gen_dt
);
14296 if (gen_dt
&& gen_dt
->generic
&& gen_dt
->generic
->next
14297 && (!gen_dt
->generic
->sym
->attr
.use_assoc
14298 || gen_dt
->generic
->sym
->module
!= gen_dt
->generic
->next
->sym
->module
)
14299 && !gfc_notify_std (GFC_STD_F2003
, "Generic name %qs of function "
14300 "%qs at %L being the same name as derived "
14301 "type at %L", sym
->name
,
14302 gen_dt
->generic
->sym
== sym
14303 ? gen_dt
->generic
->next
->sym
->name
14304 : gen_dt
->generic
->sym
->name
,
14305 gen_dt
->generic
->sym
== sym
14306 ? &gen_dt
->generic
->next
->sym
->declared_at
14307 : &gen_dt
->generic
->sym
->declared_at
,
14308 &sym
->declared_at
))
14311 if (sym
->components
== NULL
&& !sym
->attr
.zero_comp
&& !sym
->attr
.use_assoc
)
14313 gfc_error ("Derived type %qs at %L has not been declared",
14314 sym
->name
, &sym
->declared_at
);
14318 /* Resolve the finalizer procedures. */
14319 if (!gfc_resolve_finalizers (sym
, NULL
))
14322 if (sym
->attr
.is_class
&& sym
->ts
.u
.derived
== NULL
)
14324 /* Fix up incomplete CLASS symbols. */
14325 gfc_component
*data
= gfc_find_component (sym
, "_data", true, true, NULL
);
14326 gfc_component
*vptr
= gfc_find_component (sym
, "_vptr", true, true, NULL
);
14328 /* Nothing more to do for unlimited polymorphic entities. */
14329 if (data
->ts
.u
.derived
->attr
.unlimited_polymorphic
)
14331 else if (vptr
->ts
.u
.derived
== NULL
)
14333 gfc_symbol
*vtab
= gfc_find_derived_vtab (data
->ts
.u
.derived
);
14335 vptr
->ts
.u
.derived
= vtab
->ts
.u
.derived
;
14336 if (!resolve_fl_derived0 (vptr
->ts
.u
.derived
))
14341 if (!resolve_fl_derived0 (sym
))
14344 /* Resolve the type-bound procedures. */
14345 if (!resolve_typebound_procedures (sym
))
14348 /* Generate module vtables subject to their accessibility and their not
14349 being vtables or pdt templates. If this is not done class declarations
14350 in external procedures wind up with their own version and so SELECT TYPE
14351 fails because the vptrs do not have the same address. */
14352 if (gfc_option
.allow_std
& GFC_STD_F2003
14353 && sym
->ns
->proc_name
14354 && sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
14355 && sym
->attr
.access
!= ACCESS_PRIVATE
14356 && !(sym
->attr
.use_assoc
|| sym
->attr
.vtype
|| sym
->attr
.pdt_template
))
14358 gfc_symbol
*vtab
= gfc_find_derived_vtab (sym
);
14359 gfc_set_sym_referenced (vtab
);
14367 resolve_fl_namelist (gfc_symbol
*sym
)
14372 for (nl
= sym
->namelist
; nl
; nl
= nl
->next
)
14374 /* Check again, the check in match only works if NAMELIST comes
14376 if (nl
->sym
->as
&& nl
->sym
->as
->type
== AS_ASSUMED_SIZE
)
14378 gfc_error ("Assumed size array %qs in namelist %qs at %L is not "
14379 "allowed", nl
->sym
->name
, sym
->name
, &sym
->declared_at
);
14383 if (nl
->sym
->as
&& nl
->sym
->as
->type
== AS_ASSUMED_SHAPE
14384 && !gfc_notify_std (GFC_STD_F2003
, "NAMELIST array object %qs "
14385 "with assumed shape in namelist %qs at %L",
14386 nl
->sym
->name
, sym
->name
, &sym
->declared_at
))
14389 if (is_non_constant_shape_array (nl
->sym
)
14390 && !gfc_notify_std (GFC_STD_F2003
, "NAMELIST array object %qs "
14391 "with nonconstant shape in namelist %qs at %L",
14392 nl
->sym
->name
, sym
->name
, &sym
->declared_at
))
14395 if (nl
->sym
->ts
.type
== BT_CHARACTER
14396 && (nl
->sym
->ts
.u
.cl
->length
== NULL
14397 || !gfc_is_constant_expr (nl
->sym
->ts
.u
.cl
->length
))
14398 && !gfc_notify_std (GFC_STD_F2003
, "NAMELIST object %qs with "
14399 "nonconstant character length in "
14400 "namelist %qs at %L", nl
->sym
->name
,
14401 sym
->name
, &sym
->declared_at
))
14406 /* Reject PRIVATE objects in a PUBLIC namelist. */
14407 if (gfc_check_symbol_access (sym
))
14409 for (nl
= sym
->namelist
; nl
; nl
= nl
->next
)
14411 if (!nl
->sym
->attr
.use_assoc
14412 && !is_sym_host_assoc (nl
->sym
, sym
->ns
)
14413 && !gfc_check_symbol_access (nl
->sym
))
14415 gfc_error ("NAMELIST object %qs was declared PRIVATE and "
14416 "cannot be member of PUBLIC namelist %qs at %L",
14417 nl
->sym
->name
, sym
->name
, &sym
->declared_at
);
14421 if (nl
->sym
->ts
.type
== BT_DERIVED
14422 && (nl
->sym
->ts
.u
.derived
->attr
.alloc_comp
14423 || nl
->sym
->ts
.u
.derived
->attr
.pointer_comp
))
14425 if (!gfc_notify_std (GFC_STD_F2003
, "NAMELIST object %qs in "
14426 "namelist %qs at %L with ALLOCATABLE "
14427 "or POINTER components", nl
->sym
->name
,
14428 sym
->name
, &sym
->declared_at
))
14433 /* Types with private components that came here by USE-association. */
14434 if (nl
->sym
->ts
.type
== BT_DERIVED
14435 && derived_inaccessible (nl
->sym
->ts
.u
.derived
))
14437 gfc_error ("NAMELIST object %qs has use-associated PRIVATE "
14438 "components and cannot be member of namelist %qs at %L",
14439 nl
->sym
->name
, sym
->name
, &sym
->declared_at
);
14443 /* Types with private components that are defined in the same module. */
14444 if (nl
->sym
->ts
.type
== BT_DERIVED
14445 && !is_sym_host_assoc (nl
->sym
->ts
.u
.derived
, sym
->ns
)
14446 && nl
->sym
->ts
.u
.derived
->attr
.private_comp
)
14448 gfc_error ("NAMELIST object %qs has PRIVATE components and "
14449 "cannot be a member of PUBLIC namelist %qs at %L",
14450 nl
->sym
->name
, sym
->name
, &sym
->declared_at
);
14457 /* 14.1.2 A module or internal procedure represent local entities
14458 of the same type as a namelist member and so are not allowed. */
14459 for (nl
= sym
->namelist
; nl
; nl
= nl
->next
)
14461 if (nl
->sym
->ts
.kind
!= 0 && nl
->sym
->attr
.flavor
== FL_VARIABLE
)
14464 if (nl
->sym
->attr
.function
&& nl
->sym
== nl
->sym
->result
)
14465 if ((nl
->sym
== sym
->ns
->proc_name
)
14467 (sym
->ns
->parent
&& nl
->sym
== sym
->ns
->parent
->proc_name
))
14472 gfc_find_symbol (nl
->sym
->name
, sym
->ns
, 1, &nlsym
);
14473 if (nlsym
&& nlsym
->attr
.flavor
== FL_PROCEDURE
)
14475 gfc_error ("PROCEDURE attribute conflicts with NAMELIST "
14476 "attribute in %qs at %L", nlsym
->name
,
14477 &sym
->declared_at
);
14484 for (nl
= sym
->namelist
; nl
; nl
= nl
->next
)
14485 nl
->sym
->attr
.asynchronous
= 1;
14492 resolve_fl_parameter (gfc_symbol
*sym
)
14494 /* A parameter array's shape needs to be constant. */
14495 if (sym
->as
!= NULL
14496 && (sym
->as
->type
== AS_DEFERRED
14497 || is_non_constant_shape_array (sym
)))
14499 gfc_error ("Parameter array %qs at %L cannot be automatic "
14500 "or of deferred shape", sym
->name
, &sym
->declared_at
);
14504 /* Constraints on deferred type parameter. */
14505 if (!deferred_requirements (sym
))
14508 /* Make sure a parameter that has been implicitly typed still
14509 matches the implicit type, since PARAMETER statements can precede
14510 IMPLICIT statements. */
14511 if (sym
->attr
.implicit_type
14512 && !gfc_compare_types (&sym
->ts
, gfc_get_default_type (sym
->name
,
14515 gfc_error ("Implicitly typed PARAMETER %qs at %L doesn't match a "
14516 "later IMPLICIT type", sym
->name
, &sym
->declared_at
);
14520 /* Make sure the types of derived parameters are consistent. This
14521 type checking is deferred until resolution because the type may
14522 refer to a derived type from the host. */
14523 if (sym
->ts
.type
== BT_DERIVED
14524 && !gfc_compare_types (&sym
->ts
, &sym
->value
->ts
))
14526 gfc_error ("Incompatible derived type in PARAMETER at %L",
14527 &sym
->value
->where
);
14531 /* F03:C509,C514. */
14532 if (sym
->ts
.type
== BT_CLASS
)
14534 gfc_error ("CLASS variable %qs at %L cannot have the PARAMETER attribute",
14535 sym
->name
, &sym
->declared_at
);
14543 /* Called by resolve_symbol to check PDTs. */
14546 resolve_pdt (gfc_symbol
* sym
)
14548 gfc_symbol
*derived
= NULL
;
14549 gfc_actual_arglist
*param
;
14551 bool const_len_exprs
= true;
14552 bool assumed_len_exprs
= false;
14553 symbol_attribute
*attr
;
14555 if (sym
->ts
.type
== BT_DERIVED
)
14557 derived
= sym
->ts
.u
.derived
;
14558 attr
= &(sym
->attr
);
14560 else if (sym
->ts
.type
== BT_CLASS
)
14562 derived
= CLASS_DATA (sym
)->ts
.u
.derived
;
14563 attr
= &(CLASS_DATA (sym
)->attr
);
14566 gcc_unreachable ();
14568 gcc_assert (derived
->attr
.pdt_type
);
14570 for (param
= sym
->param_list
; param
; param
= param
->next
)
14572 c
= gfc_find_component (derived
, param
->name
, false, true, NULL
);
14574 if (c
->attr
.pdt_kind
)
14577 if (param
->expr
&& !gfc_is_constant_expr (param
->expr
)
14578 && c
->attr
.pdt_len
)
14579 const_len_exprs
= false;
14580 else if (param
->spec_type
== SPEC_ASSUMED
)
14581 assumed_len_exprs
= true;
14583 if (param
->spec_type
== SPEC_DEFERRED
14584 && !attr
->allocatable
&& !attr
->pointer
)
14585 gfc_error ("The object %qs at %L has a deferred LEN "
14586 "parameter %qs and is neither allocatable "
14587 "nor a pointer", sym
->name
, &sym
->declared_at
,
14592 if (!const_len_exprs
14593 && (sym
->ns
->proc_name
->attr
.is_main_program
14594 || sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
14595 || sym
->attr
.save
!= SAVE_NONE
))
14596 gfc_error ("The AUTOMATIC object %qs at %L must not have the "
14597 "SAVE attribute or be a variable declared in the "
14598 "main program, a module or a submodule(F08/C513)",
14599 sym
->name
, &sym
->declared_at
);
14601 if (assumed_len_exprs
&& !(sym
->attr
.dummy
14602 || sym
->attr
.select_type_temporary
|| sym
->attr
.associate_var
))
14603 gfc_error ("The object %qs at %L with ASSUMED type parameters "
14604 "must be a dummy or a SELECT TYPE selector(F08/4.2)",
14605 sym
->name
, &sym
->declared_at
);
14609 /* Do anything necessary to resolve a symbol. Right now, we just
14610 assume that an otherwise unknown symbol is a variable. This sort
14611 of thing commonly happens for symbols in module. */
14614 resolve_symbol (gfc_symbol
*sym
)
14616 int check_constant
, mp_flag
;
14617 gfc_symtree
*symtree
;
14618 gfc_symtree
*this_symtree
;
14621 symbol_attribute class_attr
;
14622 gfc_array_spec
*as
;
14623 bool saved_specification_expr
;
14629 /* No symbol will ever have union type; only components can be unions.
14630 Union type declaration symbols have type BT_UNKNOWN but flavor FL_UNION
14631 (just like derived type declaration symbols have flavor FL_DERIVED). */
14632 gcc_assert (sym
->ts
.type
!= BT_UNION
);
14634 /* Coarrayed polymorphic objects with allocatable or pointer components are
14635 yet unsupported for -fcoarray=lib. */
14636 if (flag_coarray
== GFC_FCOARRAY_LIB
&& sym
->ts
.type
== BT_CLASS
14637 && sym
->ts
.u
.derived
&& CLASS_DATA (sym
)
14638 && CLASS_DATA (sym
)->attr
.codimension
14639 && (CLASS_DATA (sym
)->ts
.u
.derived
->attr
.alloc_comp
14640 || CLASS_DATA (sym
)->ts
.u
.derived
->attr
.pointer_comp
))
14642 gfc_error ("Sorry, allocatable/pointer components in polymorphic (CLASS) "
14643 "type coarrays at %L are unsupported", &sym
->declared_at
);
14647 if (sym
->attr
.artificial
)
14650 if (sym
->attr
.unlimited_polymorphic
)
14653 if (sym
->attr
.flavor
== FL_UNKNOWN
14654 || (sym
->attr
.flavor
== FL_PROCEDURE
&& !sym
->attr
.intrinsic
14655 && !sym
->attr
.generic
&& !sym
->attr
.external
14656 && sym
->attr
.if_source
== IFSRC_UNKNOWN
14657 && sym
->ts
.type
== BT_UNKNOWN
))
14660 /* If we find that a flavorless symbol is an interface in one of the
14661 parent namespaces, find its symtree in this namespace, free the
14662 symbol and set the symtree to point to the interface symbol. */
14663 for (ns
= gfc_current_ns
->parent
; ns
; ns
= ns
->parent
)
14665 symtree
= gfc_find_symtree (ns
->sym_root
, sym
->name
);
14666 if (symtree
&& (symtree
->n
.sym
->generic
||
14667 (symtree
->n
.sym
->attr
.flavor
== FL_PROCEDURE
14668 && sym
->ns
->construct_entities
)))
14670 this_symtree
= gfc_find_symtree (gfc_current_ns
->sym_root
,
14672 if (this_symtree
->n
.sym
== sym
)
14674 symtree
->n
.sym
->refs
++;
14675 gfc_release_symbol (sym
);
14676 this_symtree
->n
.sym
= symtree
->n
.sym
;
14682 /* Otherwise give it a flavor according to such attributes as
14684 if (sym
->attr
.flavor
== FL_UNKNOWN
&& sym
->attr
.external
== 0
14685 && sym
->attr
.intrinsic
== 0)
14686 sym
->attr
.flavor
= FL_VARIABLE
;
14687 else if (sym
->attr
.flavor
== FL_UNKNOWN
)
14689 sym
->attr
.flavor
= FL_PROCEDURE
;
14690 if (sym
->attr
.dimension
)
14691 sym
->attr
.function
= 1;
14695 if (sym
->attr
.external
&& sym
->ts
.type
!= BT_UNKNOWN
&& !sym
->attr
.function
)
14696 gfc_add_function (&sym
->attr
, sym
->name
, &sym
->declared_at
);
14698 if (sym
->attr
.procedure
&& sym
->attr
.if_source
!= IFSRC_DECL
14699 && !resolve_procedure_interface (sym
))
14702 if (sym
->attr
.is_protected
&& !sym
->attr
.proc_pointer
14703 && (sym
->attr
.procedure
|| sym
->attr
.external
))
14705 if (sym
->attr
.external
)
14706 gfc_error ("PROTECTED attribute conflicts with EXTERNAL attribute "
14707 "at %L", &sym
->declared_at
);
14709 gfc_error ("PROCEDURE attribute conflicts with PROTECTED attribute "
14710 "at %L", &sym
->declared_at
);
14715 if (sym
->attr
.flavor
== FL_DERIVED
&& !resolve_fl_derived (sym
))
14718 else if ((sym
->attr
.flavor
== FL_STRUCT
|| sym
->attr
.flavor
== FL_UNION
)
14719 && !resolve_fl_struct (sym
))
14722 /* Symbols that are module procedures with results (functions) have
14723 the types and array specification copied for type checking in
14724 procedures that call them, as well as for saving to a module
14725 file. These symbols can't stand the scrutiny that their results
14727 mp_flag
= (sym
->result
!= NULL
&& sym
->result
!= sym
);
14729 /* Make sure that the intrinsic is consistent with its internal
14730 representation. This needs to be done before assigning a default
14731 type to avoid spurious warnings. */
14732 if (sym
->attr
.flavor
!= FL_MODULE
&& sym
->attr
.intrinsic
14733 && !gfc_resolve_intrinsic (sym
, &sym
->declared_at
))
14736 /* Resolve associate names. */
14738 resolve_assoc_var (sym
, true);
14740 /* Assign default type to symbols that need one and don't have one. */
14741 if (sym
->ts
.type
== BT_UNKNOWN
)
14743 if (sym
->attr
.flavor
== FL_VARIABLE
|| sym
->attr
.flavor
== FL_PARAMETER
)
14745 gfc_set_default_type (sym
, 1, NULL
);
14748 if (sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.external
14749 && !sym
->attr
.function
&& !sym
->attr
.subroutine
14750 && gfc_get_default_type (sym
->name
, sym
->ns
)->type
== BT_UNKNOWN
)
14751 gfc_add_subroutine (&sym
->attr
, sym
->name
, &sym
->declared_at
);
14753 if (sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.function
)
14755 /* The specific case of an external procedure should emit an error
14756 in the case that there is no implicit type. */
14759 if (!sym
->attr
.mixed_entry_master
)
14760 gfc_set_default_type (sym
, sym
->attr
.external
, NULL
);
14764 /* Result may be in another namespace. */
14765 resolve_symbol (sym
->result
);
14767 if (!sym
->result
->attr
.proc_pointer
)
14769 sym
->ts
= sym
->result
->ts
;
14770 sym
->as
= gfc_copy_array_spec (sym
->result
->as
);
14771 sym
->attr
.dimension
= sym
->result
->attr
.dimension
;
14772 sym
->attr
.pointer
= sym
->result
->attr
.pointer
;
14773 sym
->attr
.allocatable
= sym
->result
->attr
.allocatable
;
14774 sym
->attr
.contiguous
= sym
->result
->attr
.contiguous
;
14779 else if (mp_flag
&& sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.function
)
14781 bool saved_specification_expr
= specification_expr
;
14782 specification_expr
= true;
14783 gfc_resolve_array_spec (sym
->result
->as
, false);
14784 specification_expr
= saved_specification_expr
;
14787 if (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
)
14789 as
= CLASS_DATA (sym
)->as
;
14790 class_attr
= CLASS_DATA (sym
)->attr
;
14791 class_attr
.pointer
= class_attr
.class_pointer
;
14795 class_attr
= sym
->attr
;
14800 if (sym
->attr
.contiguous
14801 && (!class_attr
.dimension
14802 || (as
->type
!= AS_ASSUMED_SHAPE
&& as
->type
!= AS_ASSUMED_RANK
14803 && !class_attr
.pointer
)))
14805 gfc_error ("%qs at %L has the CONTIGUOUS attribute but is not an "
14806 "array pointer or an assumed-shape or assumed-rank array",
14807 sym
->name
, &sym
->declared_at
);
14811 /* Assumed size arrays and assumed shape arrays must be dummy
14812 arguments. Array-spec's of implied-shape should have been resolved to
14813 AS_EXPLICIT already. */
14817 /* If AS_IMPLIED_SHAPE makes it to here, it must be a bad
14818 specification expression. */
14819 if (as
->type
== AS_IMPLIED_SHAPE
)
14822 for (i
=0; i
<as
->rank
; i
++)
14824 if (as
->lower
[i
] != NULL
&& as
->upper
[i
] == NULL
)
14826 gfc_error ("Bad specification for assumed size array at %L",
14827 &as
->lower
[i
]->where
);
14834 if (((as
->type
== AS_ASSUMED_SIZE
&& !as
->cp_was_assumed
)
14835 || as
->type
== AS_ASSUMED_SHAPE
)
14836 && !sym
->attr
.dummy
&& !sym
->attr
.select_type_temporary
)
14838 if (as
->type
== AS_ASSUMED_SIZE
)
14839 gfc_error ("Assumed size array at %L must be a dummy argument",
14840 &sym
->declared_at
);
14842 gfc_error ("Assumed shape array at %L must be a dummy argument",
14843 &sym
->declared_at
);
14846 /* TS 29113, C535a. */
14847 if (as
->type
== AS_ASSUMED_RANK
&& !sym
->attr
.dummy
14848 && !sym
->attr
.select_type_temporary
)
14850 gfc_error ("Assumed-rank array at %L must be a dummy argument",
14851 &sym
->declared_at
);
14854 if (as
->type
== AS_ASSUMED_RANK
14855 && (sym
->attr
.codimension
|| sym
->attr
.value
))
14857 gfc_error ("Assumed-rank array at %L may not have the VALUE or "
14858 "CODIMENSION attribute", &sym
->declared_at
);
14863 /* Make sure symbols with known intent or optional are really dummy
14864 variable. Because of ENTRY statement, this has to be deferred
14865 until resolution time. */
14867 if (!sym
->attr
.dummy
14868 && (sym
->attr
.optional
|| sym
->attr
.intent
!= INTENT_UNKNOWN
))
14870 gfc_error ("Symbol at %L is not a DUMMY variable", &sym
->declared_at
);
14874 if (sym
->attr
.value
&& !sym
->attr
.dummy
)
14876 gfc_error ("%qs at %L cannot have the VALUE attribute because "
14877 "it is not a dummy argument", sym
->name
, &sym
->declared_at
);
14881 if (sym
->attr
.value
&& sym
->ts
.type
== BT_CHARACTER
)
14883 gfc_charlen
*cl
= sym
->ts
.u
.cl
;
14884 if (!cl
|| !cl
->length
|| cl
->length
->expr_type
!= EXPR_CONSTANT
)
14886 gfc_error ("Character dummy variable %qs at %L with VALUE "
14887 "attribute must have constant length",
14888 sym
->name
, &sym
->declared_at
);
14892 if (sym
->ts
.is_c_interop
14893 && mpz_cmp_si (cl
->length
->value
.integer
, 1) != 0)
14895 gfc_error ("C interoperable character dummy variable %qs at %L "
14896 "with VALUE attribute must have length one",
14897 sym
->name
, &sym
->declared_at
);
14902 if (sym
->ts
.type
== BT_DERIVED
&& !sym
->attr
.is_iso_c
14903 && sym
->ts
.u
.derived
->attr
.generic
)
14905 sym
->ts
.u
.derived
= gfc_find_dt_in_generic (sym
->ts
.u
.derived
);
14906 if (!sym
->ts
.u
.derived
)
14908 gfc_error ("The derived type %qs at %L is of type %qs, "
14909 "which has not been defined", sym
->name
,
14910 &sym
->declared_at
, sym
->ts
.u
.derived
->name
);
14911 sym
->ts
.type
= BT_UNKNOWN
;
14916 /* Use the same constraints as TYPE(*), except for the type check
14917 and that only scalars and assumed-size arrays are permitted. */
14918 if (sym
->attr
.ext_attr
& (1 << EXT_ATTR_NO_ARG_CHECK
))
14920 if (!sym
->attr
.dummy
)
14922 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute shall be "
14923 "a dummy argument", sym
->name
, &sym
->declared_at
);
14927 if (sym
->ts
.type
!= BT_ASSUMED
&& sym
->ts
.type
!= BT_INTEGER
14928 && sym
->ts
.type
!= BT_REAL
&& sym
->ts
.type
!= BT_LOGICAL
14929 && sym
->ts
.type
!= BT_COMPLEX
)
14931 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute shall be "
14932 "of type TYPE(*) or of an numeric intrinsic type",
14933 sym
->name
, &sym
->declared_at
);
14937 if (sym
->attr
.allocatable
|| sym
->attr
.codimension
14938 || sym
->attr
.pointer
|| sym
->attr
.value
)
14940 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute may not "
14941 "have the ALLOCATABLE, CODIMENSION, POINTER or VALUE "
14942 "attribute", sym
->name
, &sym
->declared_at
);
14946 if (sym
->attr
.intent
== INTENT_OUT
)
14948 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute may not "
14949 "have the INTENT(OUT) attribute",
14950 sym
->name
, &sym
->declared_at
);
14953 if (sym
->attr
.dimension
&& sym
->as
->type
!= AS_ASSUMED_SIZE
)
14955 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute shall "
14956 "either be a scalar or an assumed-size array",
14957 sym
->name
, &sym
->declared_at
);
14961 /* Set the type to TYPE(*) and add a dimension(*) to ensure
14962 NO_ARG_CHECK is correctly handled in trans*.c, e.g. with
14964 sym
->ts
.type
= BT_ASSUMED
;
14965 sym
->as
= gfc_get_array_spec ();
14966 sym
->as
->type
= AS_ASSUMED_SIZE
;
14968 sym
->as
->lower
[0] = gfc_get_int_expr (gfc_default_integer_kind
, NULL
, 1);
14970 else if (sym
->ts
.type
== BT_ASSUMED
)
14972 /* TS 29113, C407a. */
14973 if (!sym
->attr
.dummy
)
14975 gfc_error ("Assumed type of variable %s at %L is only permitted "
14976 "for dummy variables", sym
->name
, &sym
->declared_at
);
14979 if (sym
->attr
.allocatable
|| sym
->attr
.codimension
14980 || sym
->attr
.pointer
|| sym
->attr
.value
)
14982 gfc_error ("Assumed-type variable %s at %L may not have the "
14983 "ALLOCATABLE, CODIMENSION, POINTER or VALUE attribute",
14984 sym
->name
, &sym
->declared_at
);
14987 if (sym
->attr
.intent
== INTENT_OUT
)
14989 gfc_error ("Assumed-type variable %s at %L may not have the "
14990 "INTENT(OUT) attribute",
14991 sym
->name
, &sym
->declared_at
);
14994 if (sym
->attr
.dimension
&& sym
->as
->type
== AS_EXPLICIT
)
14996 gfc_error ("Assumed-type variable %s at %L shall not be an "
14997 "explicit-shape array", sym
->name
, &sym
->declared_at
);
15002 /* If the symbol is marked as bind(c), that it is declared at module level
15003 scope and verify its type and kind. Do not do the latter for symbols
15004 that are implicitly typed because that is handled in
15005 gfc_set_default_type. Handle dummy arguments and procedure definitions
15006 separately. Also, anything that is use associated is not handled here
15007 but instead is handled in the module it is declared in. Finally, derived
15008 type definitions are allowed to be BIND(C) since that only implies that
15009 they're interoperable, and they are checked fully for interoperability
15010 when a variable is declared of that type. */
15011 if (sym
->attr
.is_bind_c
&& sym
->attr
.use_assoc
== 0
15012 && sym
->attr
.dummy
== 0 && sym
->attr
.flavor
!= FL_PROCEDURE
15013 && sym
->attr
.flavor
!= FL_DERIVED
)
15017 /* First, make sure the variable is declared at the
15018 module-level scope (J3/04-007, Section 15.3). */
15019 if (sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
&&
15020 sym
->attr
.in_common
== 0)
15022 gfc_error ("Variable %qs at %L cannot be BIND(C) because it "
15023 "is neither a COMMON block nor declared at the "
15024 "module level scope", sym
->name
, &(sym
->declared_at
));
15027 else if (sym
->ts
.type
== BT_CHARACTER
15028 && (sym
->ts
.u
.cl
== NULL
|| sym
->ts
.u
.cl
->length
== NULL
15029 || !gfc_is_constant_expr (sym
->ts
.u
.cl
->length
)
15030 || mpz_cmp_si (sym
->ts
.u
.cl
->length
->value
.integer
, 1) != 0))
15032 gfc_error ("BIND(C) Variable %qs at %L must have length one",
15033 sym
->name
, &sym
->declared_at
);
15036 else if (sym
->common_head
!= NULL
&& sym
->attr
.implicit_type
== 0)
15038 t
= verify_com_block_vars_c_interop (sym
->common_head
);
15040 else if (sym
->attr
.implicit_type
== 0)
15042 /* If type() declaration, we need to verify that the components
15043 of the given type are all C interoperable, etc. */
15044 if (sym
->ts
.type
== BT_DERIVED
&&
15045 sym
->ts
.u
.derived
->attr
.is_c_interop
!= 1)
15047 /* Make sure the user marked the derived type as BIND(C). If
15048 not, call the verify routine. This could print an error
15049 for the derived type more than once if multiple variables
15050 of that type are declared. */
15051 if (sym
->ts
.u
.derived
->attr
.is_bind_c
!= 1)
15052 verify_bind_c_derived_type (sym
->ts
.u
.derived
);
15056 /* Verify the variable itself as C interoperable if it
15057 is BIND(C). It is not possible for this to succeed if
15058 the verify_bind_c_derived_type failed, so don't have to handle
15059 any error returned by verify_bind_c_derived_type. */
15060 t
= verify_bind_c_sym (sym
, &(sym
->ts
), sym
->attr
.in_common
,
15061 sym
->common_block
);
15066 /* clear the is_bind_c flag to prevent reporting errors more than
15067 once if something failed. */
15068 sym
->attr
.is_bind_c
= 0;
15073 /* If a derived type symbol has reached this point, without its
15074 type being declared, we have an error. Notice that most
15075 conditions that produce undefined derived types have already
15076 been dealt with. However, the likes of:
15077 implicit type(t) (t) ..... call foo (t) will get us here if
15078 the type is not declared in the scope of the implicit
15079 statement. Change the type to BT_UNKNOWN, both because it is so
15080 and to prevent an ICE. */
15081 if (sym
->ts
.type
== BT_DERIVED
&& !sym
->attr
.is_iso_c
15082 && sym
->ts
.u
.derived
->components
== NULL
15083 && !sym
->ts
.u
.derived
->attr
.zero_comp
)
15085 gfc_error ("The derived type %qs at %L is of type %qs, "
15086 "which has not been defined", sym
->name
,
15087 &sym
->declared_at
, sym
->ts
.u
.derived
->name
);
15088 sym
->ts
.type
= BT_UNKNOWN
;
15092 /* Make sure that the derived type has been resolved and that the
15093 derived type is visible in the symbol's namespace, if it is a
15094 module function and is not PRIVATE. */
15095 if (sym
->ts
.type
== BT_DERIVED
15096 && sym
->ts
.u
.derived
->attr
.use_assoc
15097 && sym
->ns
->proc_name
15098 && sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
15099 && !resolve_fl_derived (sym
->ts
.u
.derived
))
15102 /* Unless the derived-type declaration is use associated, Fortran 95
15103 does not allow public entries of private derived types.
15104 See 4.4.1 (F95) and 4.5.1.1 (F2003); and related interpretation
15105 161 in 95-006r3. */
15106 if (sym
->ts
.type
== BT_DERIVED
15107 && sym
->ns
->proc_name
&& sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
15108 && !sym
->ts
.u
.derived
->attr
.use_assoc
15109 && gfc_check_symbol_access (sym
)
15110 && !gfc_check_symbol_access (sym
->ts
.u
.derived
)
15111 && !gfc_notify_std (GFC_STD_F2003
, "PUBLIC %s %qs at %L of PRIVATE "
15112 "derived type %qs",
15113 (sym
->attr
.flavor
== FL_PARAMETER
)
15114 ? "parameter" : "variable",
15115 sym
->name
, &sym
->declared_at
,
15116 sym
->ts
.u
.derived
->name
))
15119 /* F2008, C1302. */
15120 if (sym
->ts
.type
== BT_DERIVED
15121 && ((sym
->ts
.u
.derived
->from_intmod
== INTMOD_ISO_FORTRAN_ENV
15122 && sym
->ts
.u
.derived
->intmod_sym_id
== ISOFORTRAN_LOCK_TYPE
)
15123 || sym
->ts
.u
.derived
->attr
.lock_comp
)
15124 && !sym
->attr
.codimension
&& !sym
->ts
.u
.derived
->attr
.coarray_comp
)
15126 gfc_error ("Variable %s at %L of type LOCK_TYPE or with subcomponent of "
15127 "type LOCK_TYPE must be a coarray", sym
->name
,
15128 &sym
->declared_at
);
15132 /* TS18508, C702/C703. */
15133 if (sym
->ts
.type
== BT_DERIVED
15134 && ((sym
->ts
.u
.derived
->from_intmod
== INTMOD_ISO_FORTRAN_ENV
15135 && sym
->ts
.u
.derived
->intmod_sym_id
== ISOFORTRAN_EVENT_TYPE
)
15136 || sym
->ts
.u
.derived
->attr
.event_comp
)
15137 && !sym
->attr
.codimension
&& !sym
->ts
.u
.derived
->attr
.coarray_comp
)
15139 gfc_error ("Variable %s at %L of type EVENT_TYPE or with subcomponent of "
15140 "type EVENT_TYPE must be a coarray", sym
->name
,
15141 &sym
->declared_at
);
15145 /* An assumed-size array with INTENT(OUT) shall not be of a type for which
15146 default initialization is defined (5.1.2.4.4). */
15147 if (sym
->ts
.type
== BT_DERIVED
15149 && sym
->attr
.intent
== INTENT_OUT
15151 && sym
->as
->type
== AS_ASSUMED_SIZE
)
15153 for (c
= sym
->ts
.u
.derived
->components
; c
; c
= c
->next
)
15155 if (c
->initializer
)
15157 gfc_error ("The INTENT(OUT) dummy argument %qs at %L is "
15158 "ASSUMED SIZE and so cannot have a default initializer",
15159 sym
->name
, &sym
->declared_at
);
15166 if (sym
->ts
.type
== BT_DERIVED
&& sym
->attr
.dummy
15167 && sym
->attr
.intent
== INTENT_OUT
&& sym
->attr
.lock_comp
)
15169 gfc_error ("Dummy argument %qs at %L of LOCK_TYPE shall not be "
15170 "INTENT(OUT)", sym
->name
, &sym
->declared_at
);
15175 if (sym
->ts
.type
== BT_DERIVED
&& sym
->attr
.dummy
15176 && sym
->attr
.intent
== INTENT_OUT
&& sym
->attr
.event_comp
)
15178 gfc_error ("Dummy argument %qs at %L of EVENT_TYPE shall not be "
15179 "INTENT(OUT)", sym
->name
, &sym
->declared_at
);
15184 if ((((sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
->attr
.coarray_comp
)
15185 || (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
15186 && CLASS_DATA (sym
)->attr
.coarray_comp
))
15187 || class_attr
.codimension
)
15188 && (sym
->attr
.result
|| sym
->result
== sym
))
15190 gfc_error ("Function result %qs at %L shall not be a coarray or have "
15191 "a coarray component", sym
->name
, &sym
->declared_at
);
15196 if (sym
->attr
.codimension
&& sym
->ts
.type
== BT_DERIVED
15197 && sym
->ts
.u
.derived
->ts
.is_iso_c
)
15199 gfc_error ("Variable %qs at %L of TYPE(C_PTR) or TYPE(C_FUNPTR) "
15200 "shall not be a coarray", sym
->name
, &sym
->declared_at
);
15205 if (((sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
->attr
.coarray_comp
)
15206 || (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
15207 && CLASS_DATA (sym
)->attr
.coarray_comp
))
15208 && (class_attr
.codimension
|| class_attr
.pointer
|| class_attr
.dimension
15209 || class_attr
.allocatable
))
15211 gfc_error ("Variable %qs at %L with coarray component shall be a "
15212 "nonpointer, nonallocatable scalar, which is not a coarray",
15213 sym
->name
, &sym
->declared_at
);
15217 /* F2008, C526. The function-result case was handled above. */
15218 if (class_attr
.codimension
15219 && !(class_attr
.allocatable
|| sym
->attr
.dummy
|| sym
->attr
.save
15220 || sym
->attr
.select_type_temporary
15221 || sym
->attr
.associate_var
15222 || (sym
->ns
->save_all
&& !sym
->attr
.automatic
)
15223 || sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
15224 || sym
->ns
->proc_name
->attr
.is_main_program
15225 || sym
->attr
.function
|| sym
->attr
.result
|| sym
->attr
.use_assoc
))
15227 gfc_error ("Variable %qs at %L is a coarray and is not ALLOCATABLE, SAVE "
15228 "nor a dummy argument", sym
->name
, &sym
->declared_at
);
15232 else if (class_attr
.codimension
&& !sym
->attr
.select_type_temporary
15233 && !class_attr
.allocatable
&& as
&& as
->cotype
== AS_DEFERRED
)
15235 gfc_error ("Coarray variable %qs at %L shall not have codimensions with "
15236 "deferred shape", sym
->name
, &sym
->declared_at
);
15239 else if (class_attr
.codimension
&& class_attr
.allocatable
&& as
15240 && (as
->cotype
!= AS_DEFERRED
|| as
->type
!= AS_DEFERRED
))
15242 gfc_error ("Allocatable coarray variable %qs at %L must have "
15243 "deferred shape", sym
->name
, &sym
->declared_at
);
15248 if ((((sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
->attr
.coarray_comp
)
15249 || (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
15250 && CLASS_DATA (sym
)->attr
.coarray_comp
))
15251 || (class_attr
.codimension
&& class_attr
.allocatable
))
15252 && sym
->attr
.dummy
&& sym
->attr
.intent
== INTENT_OUT
)
15254 gfc_error ("Variable %qs at %L is INTENT(OUT) and can thus not be an "
15255 "allocatable coarray or have coarray components",
15256 sym
->name
, &sym
->declared_at
);
15260 if (class_attr
.codimension
&& sym
->attr
.dummy
15261 && sym
->ns
->proc_name
&& sym
->ns
->proc_name
->attr
.is_bind_c
)
15263 gfc_error ("Coarray dummy variable %qs at %L not allowed in BIND(C) "
15264 "procedure %qs", sym
->name
, &sym
->declared_at
,
15265 sym
->ns
->proc_name
->name
);
15269 if (sym
->ts
.type
== BT_LOGICAL
15270 && ((sym
->attr
.function
&& sym
->attr
.is_bind_c
&& sym
->result
== sym
)
15271 || ((sym
->attr
.dummy
|| sym
->attr
.result
) && sym
->ns
->proc_name
15272 && sym
->ns
->proc_name
->attr
.is_bind_c
)))
15275 for (i
= 0; gfc_logical_kinds
[i
].kind
; i
++)
15276 if (gfc_logical_kinds
[i
].kind
== sym
->ts
.kind
)
15278 if (!gfc_logical_kinds
[i
].c_bool
&& sym
->attr
.dummy
15279 && !gfc_notify_std (GFC_STD_GNU
, "LOGICAL dummy argument %qs at "
15280 "%L with non-C_Bool kind in BIND(C) procedure "
15281 "%qs", sym
->name
, &sym
->declared_at
,
15282 sym
->ns
->proc_name
->name
))
15284 else if (!gfc_logical_kinds
[i
].c_bool
15285 && !gfc_notify_std (GFC_STD_GNU
, "LOGICAL result variable "
15286 "%qs at %L with non-C_Bool kind in "
15287 "BIND(C) procedure %qs", sym
->name
,
15289 sym
->attr
.function
? sym
->name
15290 : sym
->ns
->proc_name
->name
))
15294 switch (sym
->attr
.flavor
)
15297 if (!resolve_fl_variable (sym
, mp_flag
))
15302 if (sym
->formal
&& !sym
->formal_ns
)
15304 /* Check that none of the arguments are a namelist. */
15305 gfc_formal_arglist
*formal
= sym
->formal
;
15307 for (; formal
; formal
= formal
->next
)
15308 if (formal
->sym
&& formal
->sym
->attr
.flavor
== FL_NAMELIST
)
15310 gfc_error ("Namelist %qs can not be an argument to "
15311 "subroutine or function at %L",
15312 formal
->sym
->name
, &sym
->declared_at
);
15317 if (!resolve_fl_procedure (sym
, mp_flag
))
15322 if (!resolve_fl_namelist (sym
))
15327 if (!resolve_fl_parameter (sym
))
15335 /* Resolve array specifier. Check as well some constraints
15336 on COMMON blocks. */
15338 check_constant
= sym
->attr
.in_common
&& !sym
->attr
.pointer
;
15340 /* Set the formal_arg_flag so that check_conflict will not throw
15341 an error for host associated variables in the specification
15342 expression for an array_valued function. */
15343 if (sym
->attr
.function
&& sym
->as
)
15344 formal_arg_flag
= true;
15346 saved_specification_expr
= specification_expr
;
15347 specification_expr
= true;
15348 gfc_resolve_array_spec (sym
->as
, check_constant
);
15349 specification_expr
= saved_specification_expr
;
15351 formal_arg_flag
= false;
15353 /* Resolve formal namespaces. */
15354 if (sym
->formal_ns
&& sym
->formal_ns
!= gfc_current_ns
15355 && !sym
->attr
.contained
&& !sym
->attr
.intrinsic
)
15356 gfc_resolve (sym
->formal_ns
);
15358 /* Make sure the formal namespace is present. */
15359 if (sym
->formal
&& !sym
->formal_ns
)
15361 gfc_formal_arglist
*formal
= sym
->formal
;
15362 while (formal
&& !formal
->sym
)
15363 formal
= formal
->next
;
15367 sym
->formal_ns
= formal
->sym
->ns
;
15368 if (sym
->ns
!= formal
->sym
->ns
)
15369 sym
->formal_ns
->refs
++;
15373 /* Check threadprivate restrictions. */
15374 if (sym
->attr
.threadprivate
&& !sym
->attr
.save
15375 && !(sym
->ns
->save_all
&& !sym
->attr
.automatic
)
15376 && (!sym
->attr
.in_common
15377 && sym
->module
== NULL
15378 && (sym
->ns
->proc_name
== NULL
15379 || sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
)))
15380 gfc_error ("Threadprivate at %L isn't SAVEd", &sym
->declared_at
);
15382 /* Check omp declare target restrictions. */
15383 if (sym
->attr
.omp_declare_target
15384 && sym
->attr
.flavor
== FL_VARIABLE
15386 && !(sym
->ns
->save_all
&& !sym
->attr
.automatic
)
15387 && (!sym
->attr
.in_common
15388 && sym
->module
== NULL
15389 && (sym
->ns
->proc_name
== NULL
15390 || sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
)))
15391 gfc_error ("!$OMP DECLARE TARGET variable %qs at %L isn't SAVEd",
15392 sym
->name
, &sym
->declared_at
);
15394 /* If we have come this far we can apply default-initializers, as
15395 described in 14.7.5, to those variables that have not already
15396 been assigned one. */
15397 if (sym
->ts
.type
== BT_DERIVED
15399 && !sym
->attr
.allocatable
15400 && !sym
->attr
.alloc_comp
)
15402 symbol_attribute
*a
= &sym
->attr
;
15404 if ((!a
->save
&& !a
->dummy
&& !a
->pointer
15405 && !a
->in_common
&& !a
->use_assoc
15407 && !((a
->function
|| a
->result
)
15409 || sym
->ts
.u
.derived
->attr
.alloc_comp
15410 || sym
->ts
.u
.derived
->attr
.pointer_comp
))
15411 && !(a
->function
&& sym
!= sym
->result
))
15412 || (a
->dummy
&& a
->intent
== INTENT_OUT
&& !a
->pointer
))
15413 apply_default_init (sym
);
15414 else if (a
->function
&& sym
->result
&& a
->access
!= ACCESS_PRIVATE
15415 && (sym
->ts
.u
.derived
->attr
.alloc_comp
15416 || sym
->ts
.u
.derived
->attr
.pointer_comp
))
15417 /* Mark the result symbol to be referenced, when it has allocatable
15419 sym
->result
->attr
.referenced
= 1;
15422 if (sym
->ts
.type
== BT_CLASS
&& sym
->ns
== gfc_current_ns
15423 && sym
->attr
.dummy
&& sym
->attr
.intent
== INTENT_OUT
15424 && !CLASS_DATA (sym
)->attr
.class_pointer
15425 && !CLASS_DATA (sym
)->attr
.allocatable
)
15426 apply_default_init (sym
);
15428 /* If this symbol has a type-spec, check it. */
15429 if (sym
->attr
.flavor
== FL_VARIABLE
|| sym
->attr
.flavor
== FL_PARAMETER
15430 || (sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.function
))
15431 if (!resolve_typespec_used (&sym
->ts
, &sym
->declared_at
, sym
->name
))
15434 if (sym
->param_list
)
15439 /************* Resolve DATA statements *************/
15443 gfc_data_value
*vnode
;
15449 /* Advance the values structure to point to the next value in the data list. */
15452 next_data_value (void)
15454 while (mpz_cmp_ui (values
.left
, 0) == 0)
15457 if (values
.vnode
->next
== NULL
)
15460 values
.vnode
= values
.vnode
->next
;
15461 mpz_set (values
.left
, values
.vnode
->repeat
);
15469 check_data_variable (gfc_data_variable
*var
, locus
*where
)
15475 ar_type mark
= AR_UNKNOWN
;
15477 mpz_t section_index
[GFC_MAX_DIMENSIONS
];
15483 if (!gfc_resolve_expr (var
->expr
))
15487 mpz_init_set_si (offset
, 0);
15490 if (e
->expr_type
== EXPR_FUNCTION
&& e
->value
.function
.isym
15491 && e
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
)
15492 e
= e
->value
.function
.actual
->expr
;
15494 if (e
->expr_type
!= EXPR_VARIABLE
)
15495 gfc_internal_error ("check_data_variable(): Bad expression");
15497 sym
= e
->symtree
->n
.sym
;
15499 if (sym
->ns
->is_block_data
&& !sym
->attr
.in_common
)
15501 gfc_error ("BLOCK DATA element %qs at %L must be in COMMON",
15502 sym
->name
, &sym
->declared_at
);
15505 if (e
->ref
== NULL
&& sym
->as
)
15507 gfc_error ("DATA array %qs at %L must be specified in a previous"
15508 " declaration", sym
->name
, where
);
15512 has_pointer
= sym
->attr
.pointer
;
15514 if (gfc_is_coindexed (e
))
15516 gfc_error ("DATA element %qs at %L cannot have a coindex", sym
->name
,
15521 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
15523 if (ref
->type
== REF_COMPONENT
&& ref
->u
.c
.component
->attr
.pointer
)
15527 && ref
->type
== REF_ARRAY
15528 && ref
->u
.ar
.type
!= AR_FULL
)
15530 gfc_error ("DATA element %qs at %L is a pointer and so must "
15531 "be a full array", sym
->name
, where
);
15536 if (e
->rank
== 0 || has_pointer
)
15538 mpz_init_set_ui (size
, 1);
15545 /* Find the array section reference. */
15546 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
15548 if (ref
->type
!= REF_ARRAY
)
15550 if (ref
->u
.ar
.type
== AR_ELEMENT
)
15556 /* Set marks according to the reference pattern. */
15557 switch (ref
->u
.ar
.type
)
15565 /* Get the start position of array section. */
15566 gfc_get_section_index (ar
, section_index
, &offset
);
15571 gcc_unreachable ();
15574 if (!gfc_array_size (e
, &size
))
15576 gfc_error ("Nonconstant array section at %L in DATA statement",
15578 mpz_clear (offset
);
15585 while (mpz_cmp_ui (size
, 0) > 0)
15587 if (!next_data_value ())
15589 gfc_error ("DATA statement at %L has more variables than values",
15595 t
= gfc_check_assign (var
->expr
, values
.vnode
->expr
, 0);
15599 /* If we have more than one element left in the repeat count,
15600 and we have more than one element left in the target variable,
15601 then create a range assignment. */
15602 /* FIXME: Only done for full arrays for now, since array sections
15604 if (mark
== AR_FULL
&& ref
&& ref
->next
== NULL
15605 && mpz_cmp_ui (values
.left
, 1) > 0 && mpz_cmp_ui (size
, 1) > 0)
15609 if (mpz_cmp (size
, values
.left
) >= 0)
15611 mpz_init_set (range
, values
.left
);
15612 mpz_sub (size
, size
, values
.left
);
15613 mpz_set_ui (values
.left
, 0);
15617 mpz_init_set (range
, size
);
15618 mpz_sub (values
.left
, values
.left
, size
);
15619 mpz_set_ui (size
, 0);
15622 t
= gfc_assign_data_value (var
->expr
, values
.vnode
->expr
,
15625 mpz_add (offset
, offset
, range
);
15632 /* Assign initial value to symbol. */
15635 mpz_sub_ui (values
.left
, values
.left
, 1);
15636 mpz_sub_ui (size
, size
, 1);
15638 t
= gfc_assign_data_value (var
->expr
, values
.vnode
->expr
,
15643 if (mark
== AR_FULL
)
15644 mpz_add_ui (offset
, offset
, 1);
15646 /* Modify the array section indexes and recalculate the offset
15647 for next element. */
15648 else if (mark
== AR_SECTION
)
15649 gfc_advance_section (section_index
, ar
, &offset
);
15653 if (mark
== AR_SECTION
)
15655 for (i
= 0; i
< ar
->dimen
; i
++)
15656 mpz_clear (section_index
[i
]);
15660 mpz_clear (offset
);
15666 static bool traverse_data_var (gfc_data_variable
*, locus
*);
15668 /* Iterate over a list of elements in a DATA statement. */
15671 traverse_data_list (gfc_data_variable
*var
, locus
*where
)
15674 iterator_stack frame
;
15675 gfc_expr
*e
, *start
, *end
, *step
;
15676 bool retval
= true;
15678 mpz_init (frame
.value
);
15681 start
= gfc_copy_expr (var
->iter
.start
);
15682 end
= gfc_copy_expr (var
->iter
.end
);
15683 step
= gfc_copy_expr (var
->iter
.step
);
15685 if (!gfc_simplify_expr (start
, 1)
15686 || start
->expr_type
!= EXPR_CONSTANT
)
15688 gfc_error ("start of implied-do loop at %L could not be "
15689 "simplified to a constant value", &start
->where
);
15693 if (!gfc_simplify_expr (end
, 1)
15694 || end
->expr_type
!= EXPR_CONSTANT
)
15696 gfc_error ("end of implied-do loop at %L could not be "
15697 "simplified to a constant value", &start
->where
);
15701 if (!gfc_simplify_expr (step
, 1)
15702 || step
->expr_type
!= EXPR_CONSTANT
)
15704 gfc_error ("step of implied-do loop at %L could not be "
15705 "simplified to a constant value", &start
->where
);
15710 mpz_set (trip
, end
->value
.integer
);
15711 mpz_sub (trip
, trip
, start
->value
.integer
);
15712 mpz_add (trip
, trip
, step
->value
.integer
);
15714 mpz_div (trip
, trip
, step
->value
.integer
);
15716 mpz_set (frame
.value
, start
->value
.integer
);
15718 frame
.prev
= iter_stack
;
15719 frame
.variable
= var
->iter
.var
->symtree
;
15720 iter_stack
= &frame
;
15722 while (mpz_cmp_ui (trip
, 0) > 0)
15724 if (!traverse_data_var (var
->list
, where
))
15730 e
= gfc_copy_expr (var
->expr
);
15731 if (!gfc_simplify_expr (e
, 1))
15738 mpz_add (frame
.value
, frame
.value
, step
->value
.integer
);
15740 mpz_sub_ui (trip
, trip
, 1);
15744 mpz_clear (frame
.value
);
15747 gfc_free_expr (start
);
15748 gfc_free_expr (end
);
15749 gfc_free_expr (step
);
15751 iter_stack
= frame
.prev
;
15756 /* Type resolve variables in the variable list of a DATA statement. */
15759 traverse_data_var (gfc_data_variable
*var
, locus
*where
)
15763 for (; var
; var
= var
->next
)
15765 if (var
->expr
== NULL
)
15766 t
= traverse_data_list (var
, where
);
15768 t
= check_data_variable (var
, where
);
15778 /* Resolve the expressions and iterators associated with a data statement.
15779 This is separate from the assignment checking because data lists should
15780 only be resolved once. */
15783 resolve_data_variables (gfc_data_variable
*d
)
15785 for (; d
; d
= d
->next
)
15787 if (d
->list
== NULL
)
15789 if (!gfc_resolve_expr (d
->expr
))
15794 if (!gfc_resolve_iterator (&d
->iter
, false, true))
15797 if (!resolve_data_variables (d
->list
))
15806 /* Resolve a single DATA statement. We implement this by storing a pointer to
15807 the value list into static variables, and then recursively traversing the
15808 variables list, expanding iterators and such. */
15811 resolve_data (gfc_data
*d
)
15814 if (!resolve_data_variables (d
->var
))
15817 values
.vnode
= d
->value
;
15818 if (d
->value
== NULL
)
15819 mpz_set_ui (values
.left
, 0);
15821 mpz_set (values
.left
, d
->value
->repeat
);
15823 if (!traverse_data_var (d
->var
, &d
->where
))
15826 /* At this point, we better not have any values left. */
15828 if (next_data_value ())
15829 gfc_error ("DATA statement at %L has more values than variables",
15834 /* 12.6 Constraint: In a pure subprogram any variable which is in common or
15835 accessed by host or use association, is a dummy argument to a pure function,
15836 is a dummy argument with INTENT (IN) to a pure subroutine, or an object that
15837 is storage associated with any such variable, shall not be used in the
15838 following contexts: (clients of this function). */
15840 /* Determines if a variable is not 'pure', i.e., not assignable within a pure
15841 procedure. Returns zero if assignment is OK, nonzero if there is a
15844 gfc_impure_variable (gfc_symbol
*sym
)
15849 if (sym
->attr
.use_assoc
|| sym
->attr
.in_common
)
15852 /* Check if the symbol's ns is inside the pure procedure. */
15853 for (ns
= gfc_current_ns
; ns
; ns
= ns
->parent
)
15857 if (ns
->proc_name
->attr
.flavor
== FL_PROCEDURE
&& !sym
->attr
.function
)
15861 proc
= sym
->ns
->proc_name
;
15862 if (sym
->attr
.dummy
15863 && ((proc
->attr
.subroutine
&& sym
->attr
.intent
== INTENT_IN
)
15864 || proc
->attr
.function
))
15867 /* TODO: Sort out what can be storage associated, if anything, and include
15868 it here. In principle equivalences should be scanned but it does not
15869 seem to be possible to storage associate an impure variable this way. */
15874 /* Test whether a symbol is pure or not. For a NULL pointer, checks if the
15875 current namespace is inside a pure procedure. */
15878 gfc_pure (gfc_symbol
*sym
)
15880 symbol_attribute attr
;
15885 /* Check if the current namespace or one of its parents
15886 belongs to a pure procedure. */
15887 for (ns
= gfc_current_ns
; ns
; ns
= ns
->parent
)
15889 sym
= ns
->proc_name
;
15893 if (attr
.flavor
== FL_PROCEDURE
&& attr
.pure
)
15901 return attr
.flavor
== FL_PROCEDURE
&& attr
.pure
;
15905 /* Test whether a symbol is implicitly pure or not. For a NULL pointer,
15906 checks if the current namespace is implicitly pure. Note that this
15907 function returns false for a PURE procedure. */
15910 gfc_implicit_pure (gfc_symbol
*sym
)
15916 /* Check if the current procedure is implicit_pure. Walk up
15917 the procedure list until we find a procedure. */
15918 for (ns
= gfc_current_ns
; ns
; ns
= ns
->parent
)
15920 sym
= ns
->proc_name
;
15924 if (sym
->attr
.flavor
== FL_PROCEDURE
)
15929 return sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.implicit_pure
15930 && !sym
->attr
.pure
;
15935 gfc_unset_implicit_pure (gfc_symbol
*sym
)
15941 /* Check if the current procedure is implicit_pure. Walk up
15942 the procedure list until we find a procedure. */
15943 for (ns
= gfc_current_ns
; ns
; ns
= ns
->parent
)
15945 sym
= ns
->proc_name
;
15949 if (sym
->attr
.flavor
== FL_PROCEDURE
)
15954 if (sym
->attr
.flavor
== FL_PROCEDURE
)
15955 sym
->attr
.implicit_pure
= 0;
15957 sym
->attr
.pure
= 0;
15961 /* Test whether the current procedure is elemental or not. */
15964 gfc_elemental (gfc_symbol
*sym
)
15966 symbol_attribute attr
;
15969 sym
= gfc_current_ns
->proc_name
;
15974 return attr
.flavor
== FL_PROCEDURE
&& attr
.elemental
;
15978 /* Warn about unused labels. */
15981 warn_unused_fortran_label (gfc_st_label
*label
)
15986 warn_unused_fortran_label (label
->left
);
15988 if (label
->defined
== ST_LABEL_UNKNOWN
)
15991 switch (label
->referenced
)
15993 case ST_LABEL_UNKNOWN
:
15994 gfc_warning (OPT_Wunused_label
, "Label %d at %L defined but not used",
15995 label
->value
, &label
->where
);
15998 case ST_LABEL_BAD_TARGET
:
15999 gfc_warning (OPT_Wunused_label
,
16000 "Label %d at %L defined but cannot be used",
16001 label
->value
, &label
->where
);
16008 warn_unused_fortran_label (label
->right
);
16012 /* Returns the sequence type of a symbol or sequence. */
16015 sequence_type (gfc_typespec ts
)
16024 if (ts
.u
.derived
->components
== NULL
)
16025 return SEQ_NONDEFAULT
;
16027 result
= sequence_type (ts
.u
.derived
->components
->ts
);
16028 for (c
= ts
.u
.derived
->components
->next
; c
; c
= c
->next
)
16029 if (sequence_type (c
->ts
) != result
)
16035 if (ts
.kind
!= gfc_default_character_kind
)
16036 return SEQ_NONDEFAULT
;
16038 return SEQ_CHARACTER
;
16041 if (ts
.kind
!= gfc_default_integer_kind
)
16042 return SEQ_NONDEFAULT
;
16044 return SEQ_NUMERIC
;
16047 if (!(ts
.kind
== gfc_default_real_kind
16048 || ts
.kind
== gfc_default_double_kind
))
16049 return SEQ_NONDEFAULT
;
16051 return SEQ_NUMERIC
;
16054 if (ts
.kind
!= gfc_default_complex_kind
)
16055 return SEQ_NONDEFAULT
;
16057 return SEQ_NUMERIC
;
16060 if (ts
.kind
!= gfc_default_logical_kind
)
16061 return SEQ_NONDEFAULT
;
16063 return SEQ_NUMERIC
;
16066 return SEQ_NONDEFAULT
;
16071 /* Resolve derived type EQUIVALENCE object. */
16074 resolve_equivalence_derived (gfc_symbol
*derived
, gfc_symbol
*sym
, gfc_expr
*e
)
16076 gfc_component
*c
= derived
->components
;
16081 /* Shall not be an object of nonsequence derived type. */
16082 if (!derived
->attr
.sequence
)
16084 gfc_error ("Derived type variable %qs at %L must have SEQUENCE "
16085 "attribute to be an EQUIVALENCE object", sym
->name
,
16090 /* Shall not have allocatable components. */
16091 if (derived
->attr
.alloc_comp
)
16093 gfc_error ("Derived type variable %qs at %L cannot have ALLOCATABLE "
16094 "components to be an EQUIVALENCE object",sym
->name
,
16099 if (sym
->attr
.in_common
&& gfc_has_default_initializer (sym
->ts
.u
.derived
))
16101 gfc_error ("Derived type variable %qs at %L with default "
16102 "initialization cannot be in EQUIVALENCE with a variable "
16103 "in COMMON", sym
->name
, &e
->where
);
16107 for (; c
; c
= c
->next
)
16109 if (gfc_bt_struct (c
->ts
.type
)
16110 && (!resolve_equivalence_derived(c
->ts
.u
.derived
, sym
, e
)))
16113 /* Shall not be an object of sequence derived type containing a pointer
16114 in the structure. */
16115 if (c
->attr
.pointer
)
16117 gfc_error ("Derived type variable %qs at %L with pointer "
16118 "component(s) cannot be an EQUIVALENCE object",
16119 sym
->name
, &e
->where
);
16127 /* Resolve equivalence object.
16128 An EQUIVALENCE object shall not be a dummy argument, a pointer, a target,
16129 an allocatable array, an object of nonsequence derived type, an object of
16130 sequence derived type containing a pointer at any level of component
16131 selection, an automatic object, a function name, an entry name, a result
16132 name, a named constant, a structure component, or a subobject of any of
16133 the preceding objects. A substring shall not have length zero. A
16134 derived type shall not have components with default initialization nor
16135 shall two objects of an equivalence group be initialized.
16136 Either all or none of the objects shall have an protected attribute.
16137 The simple constraints are done in symbol.c(check_conflict) and the rest
16138 are implemented here. */
16141 resolve_equivalence (gfc_equiv
*eq
)
16144 gfc_symbol
*first_sym
;
16147 locus
*last_where
= NULL
;
16148 seq_type eq_type
, last_eq_type
;
16149 gfc_typespec
*last_ts
;
16150 int object
, cnt_protected
;
16153 last_ts
= &eq
->expr
->symtree
->n
.sym
->ts
;
16155 first_sym
= eq
->expr
->symtree
->n
.sym
;
16159 for (object
= 1; eq
; eq
= eq
->eq
, object
++)
16163 e
->ts
= e
->symtree
->n
.sym
->ts
;
16164 /* match_varspec might not know yet if it is seeing
16165 array reference or substring reference, as it doesn't
16167 if (e
->ref
&& e
->ref
->type
== REF_ARRAY
)
16169 gfc_ref
*ref
= e
->ref
;
16170 sym
= e
->symtree
->n
.sym
;
16172 if (sym
->attr
.dimension
)
16174 ref
->u
.ar
.as
= sym
->as
;
16178 /* For substrings, convert REF_ARRAY into REF_SUBSTRING. */
16179 if (e
->ts
.type
== BT_CHARACTER
16181 && ref
->type
== REF_ARRAY
16182 && ref
->u
.ar
.dimen
== 1
16183 && ref
->u
.ar
.dimen_type
[0] == DIMEN_RANGE
16184 && ref
->u
.ar
.stride
[0] == NULL
)
16186 gfc_expr
*start
= ref
->u
.ar
.start
[0];
16187 gfc_expr
*end
= ref
->u
.ar
.end
[0];
16190 /* Optimize away the (:) reference. */
16191 if (start
== NULL
&& end
== NULL
)
16194 e
->ref
= ref
->next
;
16196 e
->ref
->next
= ref
->next
;
16201 ref
->type
= REF_SUBSTRING
;
16203 start
= gfc_get_int_expr (gfc_charlen_int_kind
,
16205 ref
->u
.ss
.start
= start
;
16206 if (end
== NULL
&& e
->ts
.u
.cl
)
16207 end
= gfc_copy_expr (e
->ts
.u
.cl
->length
);
16208 ref
->u
.ss
.end
= end
;
16209 ref
->u
.ss
.length
= e
->ts
.u
.cl
;
16216 /* Any further ref is an error. */
16219 gcc_assert (ref
->type
== REF_ARRAY
);
16220 gfc_error ("Syntax error in EQUIVALENCE statement at %L",
16226 if (!gfc_resolve_expr (e
))
16229 sym
= e
->symtree
->n
.sym
;
16231 if (sym
->attr
.is_protected
)
16233 if (cnt_protected
> 0 && cnt_protected
!= object
)
16235 gfc_error ("Either all or none of the objects in the "
16236 "EQUIVALENCE set at %L shall have the "
16237 "PROTECTED attribute",
16242 /* Shall not equivalence common block variables in a PURE procedure. */
16243 if (sym
->ns
->proc_name
16244 && sym
->ns
->proc_name
->attr
.pure
16245 && sym
->attr
.in_common
)
16247 /* Need to check for symbols that may have entered the pure
16248 procedure via a USE statement. */
16249 bool saw_sym
= false;
16250 if (sym
->ns
->use_stmts
)
16253 for (r
= sym
->ns
->use_stmts
->rename
; r
; r
= r
->next
)
16254 if (strcmp(r
->use_name
, sym
->name
) == 0) saw_sym
= true;
16260 gfc_error ("COMMON block member %qs at %L cannot be an "
16261 "EQUIVALENCE object in the pure procedure %qs",
16262 sym
->name
, &e
->where
, sym
->ns
->proc_name
->name
);
16266 /* Shall not be a named constant. */
16267 if (e
->expr_type
== EXPR_CONSTANT
)
16269 gfc_error ("Named constant %qs at %L cannot be an EQUIVALENCE "
16270 "object", sym
->name
, &e
->where
);
16274 if (e
->ts
.type
== BT_DERIVED
16275 && !resolve_equivalence_derived (e
->ts
.u
.derived
, sym
, e
))
16278 /* Check that the types correspond correctly:
16280 A numeric sequence structure may be equivalenced to another sequence
16281 structure, an object of default integer type, default real type, double
16282 precision real type, default logical type such that components of the
16283 structure ultimately only become associated to objects of the same
16284 kind. A character sequence structure may be equivalenced to an object
16285 of default character kind or another character sequence structure.
16286 Other objects may be equivalenced only to objects of the same type and
16287 kind parameters. */
16289 /* Identical types are unconditionally OK. */
16290 if (object
== 1 || gfc_compare_types (last_ts
, &sym
->ts
))
16291 goto identical_types
;
16293 last_eq_type
= sequence_type (*last_ts
);
16294 eq_type
= sequence_type (sym
->ts
);
16296 /* Since the pair of objects is not of the same type, mixed or
16297 non-default sequences can be rejected. */
16299 msg
= "Sequence %s with mixed components in EQUIVALENCE "
16300 "statement at %L with different type objects";
16302 && last_eq_type
== SEQ_MIXED
16303 && !gfc_notify_std (GFC_STD_GNU
, msg
, first_sym
->name
, last_where
))
16304 || (eq_type
== SEQ_MIXED
16305 && !gfc_notify_std (GFC_STD_GNU
, msg
, sym
->name
, &e
->where
)))
16308 msg
= "Non-default type object or sequence %s in EQUIVALENCE "
16309 "statement at %L with objects of different type";
16311 && last_eq_type
== SEQ_NONDEFAULT
16312 && !gfc_notify_std (GFC_STD_GNU
, msg
, first_sym
->name
, last_where
))
16313 || (eq_type
== SEQ_NONDEFAULT
16314 && !gfc_notify_std (GFC_STD_GNU
, msg
, sym
->name
, &e
->where
)))
16317 msg
="Non-CHARACTER object %qs in default CHARACTER "
16318 "EQUIVALENCE statement at %L";
16319 if (last_eq_type
== SEQ_CHARACTER
16320 && eq_type
!= SEQ_CHARACTER
16321 && !gfc_notify_std (GFC_STD_GNU
, msg
, sym
->name
, &e
->where
))
16324 msg
="Non-NUMERIC object %qs in default NUMERIC "
16325 "EQUIVALENCE statement at %L";
16326 if (last_eq_type
== SEQ_NUMERIC
16327 && eq_type
!= SEQ_NUMERIC
16328 && !gfc_notify_std (GFC_STD_GNU
, msg
, sym
->name
, &e
->where
))
16333 last_where
= &e
->where
;
16338 /* Shall not be an automatic array. */
16339 if (e
->ref
->type
== REF_ARRAY
16340 && !gfc_resolve_array_spec (e
->ref
->u
.ar
.as
, 1))
16342 gfc_error ("Array %qs at %L with non-constant bounds cannot be "
16343 "an EQUIVALENCE object", sym
->name
, &e
->where
);
16350 /* Shall not be a structure component. */
16351 if (r
->type
== REF_COMPONENT
)
16353 gfc_error ("Structure component %qs at %L cannot be an "
16354 "EQUIVALENCE object",
16355 r
->u
.c
.component
->name
, &e
->where
);
16359 /* A substring shall not have length zero. */
16360 if (r
->type
== REF_SUBSTRING
)
16362 if (compare_bound (r
->u
.ss
.start
, r
->u
.ss
.end
) == CMP_GT
)
16364 gfc_error ("Substring at %L has length zero",
16365 &r
->u
.ss
.start
->where
);
16375 /* Function called by resolve_fntype to flag other symbol used in the
16376 length type parameter specification of function resuls. */
16379 flag_fn_result_spec (gfc_expr
*expr
,
16381 int *f ATTRIBUTE_UNUSED
)
16386 if (expr
->expr_type
== EXPR_VARIABLE
)
16388 s
= expr
->symtree
->n
.sym
;
16389 for (ns
= s
->ns
; ns
; ns
= ns
->parent
)
16395 gfc_error ("Self reference in character length expression "
16396 "for %qs at %L", sym
->name
, &expr
->where
);
16400 if (!s
->fn_result_spec
16401 && s
->attr
.flavor
== FL_PARAMETER
)
16403 /* Function contained in a module.... */
16404 if (ns
->proc_name
&& ns
->proc_name
->attr
.flavor
== FL_MODULE
)
16407 s
->fn_result_spec
= 1;
16408 /* Make sure that this symbol is translated as a module
16410 st
= gfc_get_unique_symtree (ns
);
16414 /* ... which is use associated and called. */
16415 else if (s
->attr
.use_assoc
|| s
->attr
.used_in_submodule
16417 /* External function matched with an interface. */
16420 && s
->ns
->proc_name
->attr
.if_source
== IFSRC_DECL
)
16421 || s
->ns
->proc_name
->attr
.if_source
== IFSRC_IFBODY
)
16422 && s
->ns
->proc_name
->attr
.function
))
16423 s
->fn_result_spec
= 1;
16430 /* Resolve function and ENTRY types, issue diagnostics if needed. */
16433 resolve_fntype (gfc_namespace
*ns
)
16435 gfc_entry_list
*el
;
16438 if (ns
->proc_name
== NULL
|| !ns
->proc_name
->attr
.function
)
16441 /* If there are any entries, ns->proc_name is the entry master
16442 synthetic symbol and ns->entries->sym actual FUNCTION symbol. */
16444 sym
= ns
->entries
->sym
;
16446 sym
= ns
->proc_name
;
16447 if (sym
->result
== sym
16448 && sym
->ts
.type
== BT_UNKNOWN
16449 && !gfc_set_default_type (sym
, 0, NULL
)
16450 && !sym
->attr
.untyped
)
16452 gfc_error ("Function %qs at %L has no IMPLICIT type",
16453 sym
->name
, &sym
->declared_at
);
16454 sym
->attr
.untyped
= 1;
16457 if (sym
->ts
.type
== BT_DERIVED
&& !sym
->ts
.u
.derived
->attr
.use_assoc
16458 && !sym
->attr
.contained
16459 && !gfc_check_symbol_access (sym
->ts
.u
.derived
)
16460 && gfc_check_symbol_access (sym
))
16462 gfc_notify_std (GFC_STD_F2003
, "PUBLIC function %qs at "
16463 "%L of PRIVATE type %qs", sym
->name
,
16464 &sym
->declared_at
, sym
->ts
.u
.derived
->name
);
16468 for (el
= ns
->entries
->next
; el
; el
= el
->next
)
16470 if (el
->sym
->result
== el
->sym
16471 && el
->sym
->ts
.type
== BT_UNKNOWN
16472 && !gfc_set_default_type (el
->sym
, 0, NULL
)
16473 && !el
->sym
->attr
.untyped
)
16475 gfc_error ("ENTRY %qs at %L has no IMPLICIT type",
16476 el
->sym
->name
, &el
->sym
->declared_at
);
16477 el
->sym
->attr
.untyped
= 1;
16481 if (sym
->ts
.type
== BT_CHARACTER
)
16482 gfc_traverse_expr (sym
->ts
.u
.cl
->length
, sym
, flag_fn_result_spec
, 0);
16486 /* 12.3.2.1.1 Defined operators. */
16489 check_uop_procedure (gfc_symbol
*sym
, locus where
)
16491 gfc_formal_arglist
*formal
;
16493 if (!sym
->attr
.function
)
16495 gfc_error ("User operator procedure %qs at %L must be a FUNCTION",
16496 sym
->name
, &where
);
16500 if (sym
->ts
.type
== BT_CHARACTER
16501 && !((sym
->ts
.u
.cl
&& sym
->ts
.u
.cl
->length
) || sym
->ts
.deferred
)
16502 && !(sym
->result
&& ((sym
->result
->ts
.u
.cl
16503 && sym
->result
->ts
.u
.cl
->length
) || sym
->result
->ts
.deferred
)))
16505 gfc_error ("User operator procedure %qs at %L cannot be assumed "
16506 "character length", sym
->name
, &where
);
16510 formal
= gfc_sym_get_dummy_args (sym
);
16511 if (!formal
|| !formal
->sym
)
16513 gfc_error ("User operator procedure %qs at %L must have at least "
16514 "one argument", sym
->name
, &where
);
16518 if (formal
->sym
->attr
.intent
!= INTENT_IN
)
16520 gfc_error ("First argument of operator interface at %L must be "
16521 "INTENT(IN)", &where
);
16525 if (formal
->sym
->attr
.optional
)
16527 gfc_error ("First argument of operator interface at %L cannot be "
16528 "optional", &where
);
16532 formal
= formal
->next
;
16533 if (!formal
|| !formal
->sym
)
16536 if (formal
->sym
->attr
.intent
!= INTENT_IN
)
16538 gfc_error ("Second argument of operator interface at %L must be "
16539 "INTENT(IN)", &where
);
16543 if (formal
->sym
->attr
.optional
)
16545 gfc_error ("Second argument of operator interface at %L cannot be "
16546 "optional", &where
);
16552 gfc_error ("Operator interface at %L must have, at most, two "
16553 "arguments", &where
);
16561 gfc_resolve_uops (gfc_symtree
*symtree
)
16563 gfc_interface
*itr
;
16565 if (symtree
== NULL
)
16568 gfc_resolve_uops (symtree
->left
);
16569 gfc_resolve_uops (symtree
->right
);
16571 for (itr
= symtree
->n
.uop
->op
; itr
; itr
= itr
->next
)
16572 check_uop_procedure (itr
->sym
, itr
->sym
->declared_at
);
16576 /* Examine all of the expressions associated with a program unit,
16577 assign types to all intermediate expressions, make sure that all
16578 assignments are to compatible types and figure out which names
16579 refer to which functions or subroutines. It doesn't check code
16580 block, which is handled by gfc_resolve_code. */
16583 resolve_types (gfc_namespace
*ns
)
16589 gfc_namespace
* old_ns
= gfc_current_ns
;
16591 if (ns
->types_resolved
)
16594 /* Check that all IMPLICIT types are ok. */
16595 if (!ns
->seen_implicit_none
)
16598 for (letter
= 0; letter
!= GFC_LETTERS
; ++letter
)
16599 if (ns
->set_flag
[letter
]
16600 && !resolve_typespec_used (&ns
->default_type
[letter
],
16601 &ns
->implicit_loc
[letter
], NULL
))
16605 gfc_current_ns
= ns
;
16607 resolve_entries (ns
);
16609 resolve_common_vars (&ns
->blank_common
, false);
16610 resolve_common_blocks (ns
->common_root
);
16612 resolve_contained_functions (ns
);
16614 if (ns
->proc_name
&& ns
->proc_name
->attr
.flavor
== FL_PROCEDURE
16615 && ns
->proc_name
->attr
.if_source
== IFSRC_IFBODY
)
16616 resolve_formal_arglist (ns
->proc_name
);
16618 gfc_traverse_ns (ns
, resolve_bind_c_derived_types
);
16620 for (cl
= ns
->cl_list
; cl
; cl
= cl
->next
)
16621 resolve_charlen (cl
);
16623 gfc_traverse_ns (ns
, resolve_symbol
);
16625 resolve_fntype (ns
);
16627 for (n
= ns
->contained
; n
; n
= n
->sibling
)
16629 if (gfc_pure (ns
->proc_name
) && !gfc_pure (n
->proc_name
))
16630 gfc_error ("Contained procedure %qs at %L of a PURE procedure must "
16631 "also be PURE", n
->proc_name
->name
,
16632 &n
->proc_name
->declared_at
);
16638 gfc_do_concurrent_flag
= 0;
16639 gfc_check_interfaces (ns
);
16641 gfc_traverse_ns (ns
, resolve_values
);
16647 for (d
= ns
->data
; d
; d
= d
->next
)
16651 gfc_traverse_ns (ns
, gfc_formalize_init_value
);
16653 gfc_traverse_ns (ns
, gfc_verify_binding_labels
);
16655 for (eq
= ns
->equiv
; eq
; eq
= eq
->next
)
16656 resolve_equivalence (eq
);
16658 /* Warn about unused labels. */
16659 if (warn_unused_label
)
16660 warn_unused_fortran_label (ns
->st_labels
);
16662 gfc_resolve_uops (ns
->uop_root
);
16664 gfc_traverse_ns (ns
, gfc_verify_DTIO_procedures
);
16666 gfc_resolve_omp_declare_simd (ns
);
16668 gfc_resolve_omp_udrs (ns
->omp_udr_root
);
16670 ns
->types_resolved
= 1;
16672 gfc_current_ns
= old_ns
;
16676 /* Call gfc_resolve_code recursively. */
16679 resolve_codes (gfc_namespace
*ns
)
16682 bitmap_obstack old_obstack
;
16684 if (ns
->resolved
== 1)
16687 for (n
= ns
->contained
; n
; n
= n
->sibling
)
16690 gfc_current_ns
= ns
;
16692 /* Don't clear 'cs_base' if this is the namespace of a BLOCK construct. */
16693 if (!(ns
->proc_name
&& ns
->proc_name
->attr
.flavor
== FL_LABEL
))
16696 /* Set to an out of range value. */
16697 current_entry_id
= -1;
16699 old_obstack
= labels_obstack
;
16700 bitmap_obstack_initialize (&labels_obstack
);
16702 gfc_resolve_oacc_declare (ns
);
16703 gfc_resolve_omp_local_vars (ns
);
16704 gfc_resolve_code (ns
->code
, ns
);
16706 bitmap_obstack_release (&labels_obstack
);
16707 labels_obstack
= old_obstack
;
16711 /* This function is called after a complete program unit has been compiled.
16712 Its purpose is to examine all of the expressions associated with a program
16713 unit, assign types to all intermediate expressions, make sure that all
16714 assignments are to compatible types and figure out which names refer to
16715 which functions or subroutines. */
16718 gfc_resolve (gfc_namespace
*ns
)
16720 gfc_namespace
*old_ns
;
16721 code_stack
*old_cs_base
;
16722 struct gfc_omp_saved_state old_omp_state
;
16728 old_ns
= gfc_current_ns
;
16729 old_cs_base
= cs_base
;
16731 /* As gfc_resolve can be called during resolution of an OpenMP construct
16732 body, we should clear any state associated to it, so that say NS's
16733 DO loops are not interpreted as OpenMP loops. */
16734 if (!ns
->construct_entities
)
16735 gfc_omp_save_and_clear_state (&old_omp_state
);
16737 resolve_types (ns
);
16738 component_assignment_level
= 0;
16739 resolve_codes (ns
);
16741 gfc_current_ns
= old_ns
;
16742 cs_base
= old_cs_base
;
16745 gfc_run_passes (ns
);
16747 if (!ns
->construct_entities
)
16748 gfc_omp_restore_state (&old_omp_state
);