1 /* Perform type resolution on the various structures.
2 Copyright (C) 2001-2019 Free Software Foundation, Inc.
3 Contributed by Andy Vaught
5 This file is part of GCC.
7 GCC is free software; you can redistribute it and/or modify it under
8 the terms of the GNU General Public License as published by the Free
9 Software Foundation; either version 3, or (at your option) any later
12 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
13 WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
17 You should have received a copy of the GNU General Public License
18 along with GCC; see the file COPYING3. If not see
19 <http://www.gnu.org/licenses/>. */
23 #include "coretypes.h"
27 #include "arith.h" /* For gfc_compare_expr(). */
28 #include "dependency.h"
30 #include "target-memory.h" /* for gfc_simplify_transfer */
31 #include "constructor.h"
33 /* Types used in equivalence statements. */
37 SEQ_NONDEFAULT
, SEQ_NUMERIC
, SEQ_CHARACTER
, SEQ_MIXED
40 /* Stack to keep track of the nesting of blocks as we move through the
41 code. See resolve_branch() and gfc_resolve_code(). */
43 typedef struct code_stack
45 struct gfc_code
*head
, *current
;
46 struct code_stack
*prev
;
48 /* This bitmap keeps track of the targets valid for a branch from
49 inside this block except for END {IF|SELECT}s of enclosing
51 bitmap reachable_labels
;
55 static code_stack
*cs_base
= NULL
;
58 /* Nonzero if we're inside a FORALL or DO CONCURRENT block. */
60 static int forall_flag
;
61 int gfc_do_concurrent_flag
;
63 /* True when we are resolving an expression that is an actual argument to
65 static bool actual_arg
= false;
66 /* True when we are resolving an expression that is the first actual argument
68 static bool first_actual_arg
= false;
71 /* Nonzero if we're inside a OpenMP WORKSHARE or PARALLEL WORKSHARE block. */
73 static int omp_workshare_flag
;
75 /* True if we are processing a formal arglist. The corresponding function
76 resets the flag each time that it is read. */
77 static bool formal_arg_flag
= false;
79 /* True if we are resolving a specification expression. */
80 static bool specification_expr
= false;
82 /* The id of the last entry seen. */
83 static int current_entry_id
;
85 /* We use bitmaps to determine if a branch target is valid. */
86 static bitmap_obstack labels_obstack
;
88 /* True when simplifying a EXPR_VARIABLE argument to an inquiry function. */
89 static bool inquiry_argument
= false;
93 gfc_is_formal_arg (void)
95 return formal_arg_flag
;
98 /* Is the symbol host associated? */
100 is_sym_host_assoc (gfc_symbol
*sym
, gfc_namespace
*ns
)
102 for (ns
= ns
->parent
; ns
; ns
= ns
->parent
)
111 /* Ensure a typespec used is valid; for instance, TYPE(t) is invalid if t is
112 an ABSTRACT derived-type. If where is not NULL, an error message with that
113 locus is printed, optionally using name. */
116 resolve_typespec_used (gfc_typespec
* ts
, locus
* where
, const char* name
)
118 if (ts
->type
== BT_DERIVED
&& ts
->u
.derived
->attr
.abstract
)
123 gfc_error ("%qs at %L is of the ABSTRACT type %qs",
124 name
, where
, ts
->u
.derived
->name
);
126 gfc_error ("ABSTRACT type %qs used at %L",
127 ts
->u
.derived
->name
, where
);
138 check_proc_interface (gfc_symbol
*ifc
, locus
*where
)
140 /* Several checks for F08:C1216. */
141 if (ifc
->attr
.procedure
)
143 gfc_error ("Interface %qs at %L is declared "
144 "in a later PROCEDURE statement", ifc
->name
, where
);
149 /* For generic interfaces, check if there is
150 a specific procedure with the same name. */
151 gfc_interface
*gen
= ifc
->generic
;
152 while (gen
&& strcmp (gen
->sym
->name
, ifc
->name
) != 0)
156 gfc_error ("Interface %qs at %L may not be generic",
161 if (ifc
->attr
.proc
== PROC_ST_FUNCTION
)
163 gfc_error ("Interface %qs at %L may not be a statement function",
167 if (gfc_is_intrinsic (ifc
, 0, ifc
->declared_at
)
168 || gfc_is_intrinsic (ifc
, 1, ifc
->declared_at
))
169 ifc
->attr
.intrinsic
= 1;
170 if (ifc
->attr
.intrinsic
&& !gfc_intrinsic_actual_ok (ifc
->name
, 0))
172 gfc_error ("Intrinsic procedure %qs not allowed in "
173 "PROCEDURE statement at %L", ifc
->name
, where
);
176 if (!ifc
->attr
.if_source
&& !ifc
->attr
.intrinsic
&& ifc
->name
[0] != '\0')
178 gfc_error ("Interface %qs at %L must be explicit", ifc
->name
, where
);
185 static void resolve_symbol (gfc_symbol
*sym
);
188 /* Resolve the interface for a PROCEDURE declaration or procedure pointer. */
191 resolve_procedure_interface (gfc_symbol
*sym
)
193 gfc_symbol
*ifc
= sym
->ts
.interface
;
200 gfc_error ("PROCEDURE %qs at %L may not be used as its own interface",
201 sym
->name
, &sym
->declared_at
);
204 if (!check_proc_interface (ifc
, &sym
->declared_at
))
207 if (ifc
->attr
.if_source
|| ifc
->attr
.intrinsic
)
209 /* Resolve interface and copy attributes. */
210 resolve_symbol (ifc
);
211 if (ifc
->attr
.intrinsic
)
212 gfc_resolve_intrinsic (ifc
, &ifc
->declared_at
);
216 sym
->ts
= ifc
->result
->ts
;
217 sym
->attr
.allocatable
= ifc
->result
->attr
.allocatable
;
218 sym
->attr
.pointer
= ifc
->result
->attr
.pointer
;
219 sym
->attr
.dimension
= ifc
->result
->attr
.dimension
;
220 sym
->attr
.class_ok
= ifc
->result
->attr
.class_ok
;
221 sym
->as
= gfc_copy_array_spec (ifc
->result
->as
);
227 sym
->attr
.allocatable
= ifc
->attr
.allocatable
;
228 sym
->attr
.pointer
= ifc
->attr
.pointer
;
229 sym
->attr
.dimension
= ifc
->attr
.dimension
;
230 sym
->attr
.class_ok
= ifc
->attr
.class_ok
;
231 sym
->as
= gfc_copy_array_spec (ifc
->as
);
233 sym
->ts
.interface
= ifc
;
234 sym
->attr
.function
= ifc
->attr
.function
;
235 sym
->attr
.subroutine
= ifc
->attr
.subroutine
;
237 sym
->attr
.pure
= ifc
->attr
.pure
;
238 sym
->attr
.elemental
= ifc
->attr
.elemental
;
239 sym
->attr
.contiguous
= ifc
->attr
.contiguous
;
240 sym
->attr
.recursive
= ifc
->attr
.recursive
;
241 sym
->attr
.always_explicit
= ifc
->attr
.always_explicit
;
242 sym
->attr
.ext_attr
|= ifc
->attr
.ext_attr
;
243 sym
->attr
.is_bind_c
= ifc
->attr
.is_bind_c
;
244 /* Copy char length. */
245 if (ifc
->ts
.type
== BT_CHARACTER
&& ifc
->ts
.u
.cl
)
247 sym
->ts
.u
.cl
= gfc_new_charlen (sym
->ns
, ifc
->ts
.u
.cl
);
248 if (sym
->ts
.u
.cl
->length
&& !sym
->ts
.u
.cl
->resolved
249 && !gfc_resolve_expr (sym
->ts
.u
.cl
->length
))
258 /* Resolve types of formal argument lists. These have to be done early so that
259 the formal argument lists of module procedures can be copied to the
260 containing module before the individual procedures are resolved
261 individually. We also resolve argument lists of procedures in interface
262 blocks because they are self-contained scoping units.
264 Since a dummy argument cannot be a non-dummy procedure, the only
265 resort left for untyped names are the IMPLICIT types. */
268 resolve_formal_arglist (gfc_symbol
*proc
)
270 gfc_formal_arglist
*f
;
272 bool saved_specification_expr
;
275 if (proc
->result
!= NULL
)
280 if (gfc_elemental (proc
)
281 || sym
->attr
.pointer
|| sym
->attr
.allocatable
282 || (sym
->as
&& sym
->as
->rank
!= 0))
284 proc
->attr
.always_explicit
= 1;
285 sym
->attr
.always_explicit
= 1;
288 formal_arg_flag
= true;
290 for (f
= proc
->formal
; f
; f
= f
->next
)
298 /* Alternate return placeholder. */
299 if (gfc_elemental (proc
))
300 gfc_error ("Alternate return specifier in elemental subroutine "
301 "%qs at %L is not allowed", proc
->name
,
303 if (proc
->attr
.function
)
304 gfc_error ("Alternate return specifier in function "
305 "%qs at %L is not allowed", proc
->name
,
309 else if (sym
->attr
.procedure
&& sym
->attr
.if_source
!= IFSRC_DECL
310 && !resolve_procedure_interface (sym
))
313 if (strcmp (proc
->name
, sym
->name
) == 0)
315 gfc_error ("Self-referential argument "
316 "%qs at %L is not allowed", sym
->name
,
321 if (sym
->attr
.if_source
!= IFSRC_UNKNOWN
)
322 resolve_formal_arglist (sym
);
324 if (sym
->attr
.subroutine
|| sym
->attr
.external
)
326 if (sym
->attr
.flavor
== FL_UNKNOWN
)
327 gfc_add_flavor (&sym
->attr
, FL_PROCEDURE
, sym
->name
, &sym
->declared_at
);
331 if (sym
->ts
.type
== BT_UNKNOWN
&& !proc
->attr
.intrinsic
332 && (!sym
->attr
.function
|| sym
->result
== sym
))
333 gfc_set_default_type (sym
, 1, sym
->ns
);
336 as
= sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
337 ? CLASS_DATA (sym
)->as
: sym
->as
;
339 saved_specification_expr
= specification_expr
;
340 specification_expr
= true;
341 gfc_resolve_array_spec (as
, 0);
342 specification_expr
= saved_specification_expr
;
344 /* We can't tell if an array with dimension (:) is assumed or deferred
345 shape until we know if it has the pointer or allocatable attributes.
347 if (as
&& as
->rank
> 0 && as
->type
== AS_DEFERRED
348 && ((sym
->ts
.type
!= BT_CLASS
349 && !(sym
->attr
.pointer
|| sym
->attr
.allocatable
))
350 || (sym
->ts
.type
== BT_CLASS
351 && !(CLASS_DATA (sym
)->attr
.class_pointer
352 || CLASS_DATA (sym
)->attr
.allocatable
)))
353 && sym
->attr
.flavor
!= FL_PROCEDURE
)
355 as
->type
= AS_ASSUMED_SHAPE
;
356 for (i
= 0; i
< as
->rank
; i
++)
357 as
->lower
[i
] = gfc_get_int_expr (gfc_default_integer_kind
, NULL
, 1);
360 if ((as
&& as
->rank
> 0 && as
->type
== AS_ASSUMED_SHAPE
)
361 || (as
&& as
->type
== AS_ASSUMED_RANK
)
362 || sym
->attr
.pointer
|| sym
->attr
.allocatable
|| sym
->attr
.target
363 || (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
364 && (CLASS_DATA (sym
)->attr
.class_pointer
365 || CLASS_DATA (sym
)->attr
.allocatable
366 || CLASS_DATA (sym
)->attr
.target
))
367 || sym
->attr
.optional
)
369 proc
->attr
.always_explicit
= 1;
371 proc
->result
->attr
.always_explicit
= 1;
374 /* If the flavor is unknown at this point, it has to be a variable.
375 A procedure specification would have already set the type. */
377 if (sym
->attr
.flavor
== FL_UNKNOWN
)
378 gfc_add_flavor (&sym
->attr
, FL_VARIABLE
, sym
->name
, &sym
->declared_at
);
382 if (sym
->attr
.flavor
== FL_PROCEDURE
)
387 gfc_error ("Dummy procedure %qs of PURE procedure at %L must "
388 "also be PURE", sym
->name
, &sym
->declared_at
);
392 else if (!sym
->attr
.pointer
)
394 if (proc
->attr
.function
&& sym
->attr
.intent
!= INTENT_IN
)
397 gfc_notify_std (GFC_STD_F2008
, "Argument %qs"
398 " of pure function %qs at %L with VALUE "
399 "attribute but without INTENT(IN)",
400 sym
->name
, proc
->name
, &sym
->declared_at
);
402 gfc_error ("Argument %qs of pure function %qs at %L must "
403 "be INTENT(IN) or VALUE", sym
->name
, proc
->name
,
407 if (proc
->attr
.subroutine
&& sym
->attr
.intent
== INTENT_UNKNOWN
)
410 gfc_notify_std (GFC_STD_F2008
, "Argument %qs"
411 " of pure subroutine %qs at %L with VALUE "
412 "attribute but without INTENT", sym
->name
,
413 proc
->name
, &sym
->declared_at
);
415 gfc_error ("Argument %qs of pure subroutine %qs at %L "
416 "must have its INTENT specified or have the "
417 "VALUE attribute", sym
->name
, proc
->name
,
423 if (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.intent
== INTENT_OUT
)
425 gfc_error ("INTENT(OUT) argument %qs of pure procedure %qs at %L"
426 " may not be polymorphic", sym
->name
, proc
->name
,
432 if (proc
->attr
.implicit_pure
)
434 if (sym
->attr
.flavor
== FL_PROCEDURE
)
437 proc
->attr
.implicit_pure
= 0;
439 else if (!sym
->attr
.pointer
)
441 if (proc
->attr
.function
&& sym
->attr
.intent
!= INTENT_IN
443 proc
->attr
.implicit_pure
= 0;
445 if (proc
->attr
.subroutine
&& sym
->attr
.intent
== INTENT_UNKNOWN
447 proc
->attr
.implicit_pure
= 0;
451 if (gfc_elemental (proc
))
454 if (sym
->attr
.codimension
455 || (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
)
456 && CLASS_DATA (sym
)->attr
.codimension
))
458 gfc_error ("Coarray dummy argument %qs at %L to elemental "
459 "procedure", sym
->name
, &sym
->declared_at
);
463 if (sym
->as
|| (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
)
464 && CLASS_DATA (sym
)->as
))
466 gfc_error ("Argument %qs of elemental procedure at %L must "
467 "be scalar", sym
->name
, &sym
->declared_at
);
471 if (sym
->attr
.allocatable
472 || (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
)
473 && CLASS_DATA (sym
)->attr
.allocatable
))
475 gfc_error ("Argument %qs of elemental procedure at %L cannot "
476 "have the ALLOCATABLE attribute", sym
->name
,
481 if (sym
->attr
.pointer
482 || (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
)
483 && CLASS_DATA (sym
)->attr
.class_pointer
))
485 gfc_error ("Argument %qs of elemental procedure at %L cannot "
486 "have the POINTER attribute", sym
->name
,
491 if (sym
->attr
.flavor
== FL_PROCEDURE
)
493 gfc_error ("Dummy procedure %qs not allowed in elemental "
494 "procedure %qs at %L", sym
->name
, proc
->name
,
499 /* Fortran 2008 Corrigendum 1, C1290a. */
500 if (sym
->attr
.intent
== INTENT_UNKNOWN
&& !sym
->attr
.value
)
502 gfc_error ("Argument %qs of elemental procedure %qs at %L must "
503 "have its INTENT specified or have the VALUE "
504 "attribute", sym
->name
, proc
->name
,
510 /* Each dummy shall be specified to be scalar. */
511 if (proc
->attr
.proc
== PROC_ST_FUNCTION
)
515 /* F03:C1263 (R1238) The function-name and each dummy-arg-name
516 shall be specified, explicitly or implicitly, to be scalar. */
517 gfc_error ("Argument '%s' of statement function '%s' at %L "
518 "must be scalar", sym
->name
, proc
->name
,
523 if (sym
->ts
.type
== BT_CHARACTER
)
525 gfc_charlen
*cl
= sym
->ts
.u
.cl
;
526 if (!cl
|| !cl
->length
|| cl
->length
->expr_type
!= EXPR_CONSTANT
)
528 gfc_error ("Character-valued argument %qs of statement "
529 "function at %L must have constant length",
530 sym
->name
, &sym
->declared_at
);
536 formal_arg_flag
= false;
540 /* Work function called when searching for symbols that have argument lists
541 associated with them. */
544 find_arglists (gfc_symbol
*sym
)
546 if (sym
->attr
.if_source
== IFSRC_UNKNOWN
|| sym
->ns
!= gfc_current_ns
547 || gfc_fl_struct (sym
->attr
.flavor
) || sym
->attr
.intrinsic
)
550 resolve_formal_arglist (sym
);
554 /* Given a namespace, resolve all formal argument lists within the namespace.
558 resolve_formal_arglists (gfc_namespace
*ns
)
563 gfc_traverse_ns (ns
, find_arglists
);
568 resolve_contained_fntype (gfc_symbol
*sym
, gfc_namespace
*ns
)
572 if (sym
&& sym
->attr
.flavor
== FL_PROCEDURE
574 && sym
->ns
->parent
->proc_name
575 && sym
->ns
->parent
->proc_name
->attr
.flavor
== FL_PROCEDURE
576 && !strcmp (sym
->name
, sym
->ns
->parent
->proc_name
->name
))
577 gfc_error ("Contained procedure %qs at %L has the same name as its "
578 "encompassing procedure", sym
->name
, &sym
->declared_at
);
580 /* If this namespace is not a function or an entry master function,
582 if (! sym
|| !(sym
->attr
.function
|| sym
->attr
.flavor
== FL_VARIABLE
)
583 || sym
->attr
.entry_master
)
586 /* Try to find out of what the return type is. */
587 if (sym
->result
->ts
.type
== BT_UNKNOWN
&& sym
->result
->ts
.interface
== NULL
)
589 t
= gfc_set_default_type (sym
->result
, 0, ns
);
591 if (!t
&& !sym
->result
->attr
.untyped
)
593 if (sym
->result
== sym
)
594 gfc_error ("Contained function %qs at %L has no IMPLICIT type",
595 sym
->name
, &sym
->declared_at
);
596 else if (!sym
->result
->attr
.proc_pointer
)
597 gfc_error ("Result %qs of contained function %qs at %L has "
598 "no IMPLICIT type", sym
->result
->name
, sym
->name
,
599 &sym
->result
->declared_at
);
600 sym
->result
->attr
.untyped
= 1;
604 /* Fortran 2008 Draft Standard, page 535, C418, on type-param-value
605 type, lists the only ways a character length value of * can be used:
606 dummy arguments of procedures, named constants, function results and
607 in allocate statements if the allocate_object is an assumed length dummy
608 in external functions. Internal function results and results of module
609 procedures are not on this list, ergo, not permitted. */
611 if (sym
->result
->ts
.type
== BT_CHARACTER
)
613 gfc_charlen
*cl
= sym
->result
->ts
.u
.cl
;
614 if ((!cl
|| !cl
->length
) && !sym
->result
->ts
.deferred
)
616 /* See if this is a module-procedure and adapt error message
619 gcc_assert (ns
->parent
&& ns
->parent
->proc_name
);
620 module_proc
= (ns
->parent
->proc_name
->attr
.flavor
== FL_MODULE
);
622 gfc_error (module_proc
623 ? G_("Character-valued module procedure %qs at %L"
624 " must not be assumed length")
625 : G_("Character-valued internal function %qs at %L"
626 " must not be assumed length"),
627 sym
->name
, &sym
->declared_at
);
633 /* Add NEW_ARGS to the formal argument list of PROC, taking care not to
634 introduce duplicates. */
637 merge_argument_lists (gfc_symbol
*proc
, gfc_formal_arglist
*new_args
)
639 gfc_formal_arglist
*f
, *new_arglist
;
642 for (; new_args
!= NULL
; new_args
= new_args
->next
)
644 new_sym
= new_args
->sym
;
645 /* See if this arg is already in the formal argument list. */
646 for (f
= proc
->formal
; f
; f
= f
->next
)
648 if (new_sym
== f
->sym
)
655 /* Add a new argument. Argument order is not important. */
656 new_arglist
= gfc_get_formal_arglist ();
657 new_arglist
->sym
= new_sym
;
658 new_arglist
->next
= proc
->formal
;
659 proc
->formal
= new_arglist
;
664 /* Flag the arguments that are not present in all entries. */
667 check_argument_lists (gfc_symbol
*proc
, gfc_formal_arglist
*new_args
)
669 gfc_formal_arglist
*f
, *head
;
672 for (f
= proc
->formal
; f
; f
= f
->next
)
677 for (new_args
= head
; new_args
; new_args
= new_args
->next
)
679 if (new_args
->sym
== f
->sym
)
686 f
->sym
->attr
.not_always_present
= 1;
691 /* Resolve alternate entry points. If a symbol has multiple entry points we
692 create a new master symbol for the main routine, and turn the existing
693 symbol into an entry point. */
696 resolve_entries (gfc_namespace
*ns
)
698 gfc_namespace
*old_ns
;
702 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
703 static int master_count
= 0;
705 if (ns
->proc_name
== NULL
)
708 /* No need to do anything if this procedure doesn't have alternate entry
713 /* We may already have resolved alternate entry points. */
714 if (ns
->proc_name
->attr
.entry_master
)
717 /* If this isn't a procedure something has gone horribly wrong. */
718 gcc_assert (ns
->proc_name
->attr
.flavor
== FL_PROCEDURE
);
720 /* Remember the current namespace. */
721 old_ns
= gfc_current_ns
;
725 /* Add the main entry point to the list of entry points. */
726 el
= gfc_get_entry_list ();
727 el
->sym
= ns
->proc_name
;
729 el
->next
= ns
->entries
;
731 ns
->proc_name
->attr
.entry
= 1;
733 /* If it is a module function, it needs to be in the right namespace
734 so that gfc_get_fake_result_decl can gather up the results. The
735 need for this arose in get_proc_name, where these beasts were
736 left in their own namespace, to keep prior references linked to
737 the entry declaration.*/
738 if (ns
->proc_name
->attr
.function
739 && ns
->parent
&& ns
->parent
->proc_name
->attr
.flavor
== FL_MODULE
)
742 /* Do the same for entries where the master is not a module
743 procedure. These are retained in the module namespace because
744 of the module procedure declaration. */
745 for (el
= el
->next
; el
; el
= el
->next
)
746 if (el
->sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
747 && el
->sym
->attr
.mod_proc
)
751 /* Add an entry statement for it. */
752 c
= gfc_get_code (EXEC_ENTRY
);
757 /* Create a new symbol for the master function. */
758 /* Give the internal function a unique name (within this file).
759 Also include the function name so the user has some hope of figuring
760 out what is going on. */
761 snprintf (name
, GFC_MAX_SYMBOL_LEN
, "master.%d.%s",
762 master_count
++, ns
->proc_name
->name
);
763 gfc_get_ha_symbol (name
, &proc
);
764 gcc_assert (proc
!= NULL
);
766 gfc_add_procedure (&proc
->attr
, PROC_INTERNAL
, proc
->name
, NULL
);
767 if (ns
->proc_name
->attr
.subroutine
)
768 gfc_add_subroutine (&proc
->attr
, proc
->name
, NULL
);
772 gfc_typespec
*ts
, *fts
;
773 gfc_array_spec
*as
, *fas
;
774 gfc_add_function (&proc
->attr
, proc
->name
, NULL
);
776 fas
= ns
->entries
->sym
->as
;
777 fas
= fas
? fas
: ns
->entries
->sym
->result
->as
;
778 fts
= &ns
->entries
->sym
->result
->ts
;
779 if (fts
->type
== BT_UNKNOWN
)
780 fts
= gfc_get_default_type (ns
->entries
->sym
->result
->name
, NULL
);
781 for (el
= ns
->entries
->next
; el
; el
= el
->next
)
783 ts
= &el
->sym
->result
->ts
;
785 as
= as
? as
: el
->sym
->result
->as
;
786 if (ts
->type
== BT_UNKNOWN
)
787 ts
= gfc_get_default_type (el
->sym
->result
->name
, NULL
);
789 if (! gfc_compare_types (ts
, fts
)
790 || (el
->sym
->result
->attr
.dimension
791 != ns
->entries
->sym
->result
->attr
.dimension
)
792 || (el
->sym
->result
->attr
.pointer
793 != ns
->entries
->sym
->result
->attr
.pointer
))
795 else if (as
&& fas
&& ns
->entries
->sym
->result
!= el
->sym
->result
796 && gfc_compare_array_spec (as
, fas
) == 0)
797 gfc_error ("Function %s at %L has entries with mismatched "
798 "array specifications", ns
->entries
->sym
->name
,
799 &ns
->entries
->sym
->declared_at
);
800 /* The characteristics need to match and thus both need to have
801 the same string length, i.e. both len=*, or both len=4.
802 Having both len=<variable> is also possible, but difficult to
803 check at compile time. */
804 else if (ts
->type
== BT_CHARACTER
&& ts
->u
.cl
&& fts
->u
.cl
805 && (((ts
->u
.cl
->length
&& !fts
->u
.cl
->length
)
806 ||(!ts
->u
.cl
->length
&& fts
->u
.cl
->length
))
808 && ts
->u
.cl
->length
->expr_type
809 != fts
->u
.cl
->length
->expr_type
)
811 && ts
->u
.cl
->length
->expr_type
== EXPR_CONSTANT
812 && mpz_cmp (ts
->u
.cl
->length
->value
.integer
,
813 fts
->u
.cl
->length
->value
.integer
) != 0)))
814 gfc_notify_std (GFC_STD_GNU
, "Function %s at %L with "
815 "entries returning variables of different "
816 "string lengths", ns
->entries
->sym
->name
,
817 &ns
->entries
->sym
->declared_at
);
822 sym
= ns
->entries
->sym
->result
;
823 /* All result types the same. */
825 if (sym
->attr
.dimension
)
826 gfc_set_array_spec (proc
, gfc_copy_array_spec (sym
->as
), NULL
);
827 if (sym
->attr
.pointer
)
828 gfc_add_pointer (&proc
->attr
, NULL
);
832 /* Otherwise the result will be passed through a union by
834 proc
->attr
.mixed_entry_master
= 1;
835 for (el
= ns
->entries
; el
; el
= el
->next
)
837 sym
= el
->sym
->result
;
838 if (sym
->attr
.dimension
)
840 if (el
== ns
->entries
)
841 gfc_error ("FUNCTION result %s 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 cannot have the EXTERNAL attribute",
1093 sym
->name
, &common_root
->n
.common
->where
);
1095 if (sym
->attr
.intrinsic
)
1096 gfc_error ("COMMON block %qs at %L is also an intrinsic procedure",
1097 sym
->name
, &common_root
->n
.common
->where
);
1098 else if (sym
->attr
.result
1099 || gfc_is_function_return_value (sym
, gfc_current_ns
))
1100 gfc_notify_std (GFC_STD_F2003
, "COMMON block %qs at %L "
1101 "that is also a function result", sym
->name
,
1102 &common_root
->n
.common
->where
);
1103 else if (sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.proc
!= PROC_INTERNAL
1104 && sym
->attr
.proc
!= PROC_ST_FUNCTION
)
1105 gfc_notify_std (GFC_STD_F2003
, "COMMON block %qs at %L "
1106 "that is also a global procedure", sym
->name
,
1107 &common_root
->n
.common
->where
);
1111 /* Resolve contained function types. Because contained functions can call one
1112 another, they have to be worked out before any of the contained procedures
1115 The good news is that if a function doesn't already have a type, the only
1116 way it can get one is through an IMPLICIT type or a RESULT variable, because
1117 by definition contained functions are contained namespace they're contained
1118 in, not in a sibling or parent namespace. */
1121 resolve_contained_functions (gfc_namespace
*ns
)
1123 gfc_namespace
*child
;
1126 resolve_formal_arglists (ns
);
1128 for (child
= ns
->contained
; child
; child
= child
->sibling
)
1130 /* Resolve alternate entry points first. */
1131 resolve_entries (child
);
1133 /* Then check function return types. */
1134 resolve_contained_fntype (child
->proc_name
, child
);
1135 for (el
= child
->entries
; el
; el
= el
->next
)
1136 resolve_contained_fntype (el
->sym
, child
);
1142 /* A Parameterized Derived Type constructor must contain values for
1143 the PDT KIND parameters or they must have a default initializer.
1144 Go through the constructor picking out the KIND expressions,
1145 storing them in 'param_list' and then call gfc_get_pdt_instance
1146 to obtain the PDT instance. */
1148 static gfc_actual_arglist
*param_list
, *param_tail
, *param
;
1151 get_pdt_spec_expr (gfc_component
*c
, gfc_expr
*expr
)
1153 param
= gfc_get_actual_arglist ();
1155 param_list
= param_tail
= param
;
1158 param_tail
->next
= param
;
1159 param_tail
= param_tail
->next
;
1162 param_tail
->name
= c
->name
;
1164 param_tail
->expr
= gfc_copy_expr (expr
);
1165 else if (c
->initializer
)
1166 param_tail
->expr
= gfc_copy_expr (c
->initializer
);
1169 param_tail
->spec_type
= SPEC_ASSUMED
;
1170 if (c
->attr
.pdt_kind
)
1172 gfc_error ("The KIND parameter %qs in the PDT constructor "
1173 "at %C has no value", param
->name
);
1182 get_pdt_constructor (gfc_expr
*expr
, gfc_constructor
**constr
,
1183 gfc_symbol
*derived
)
1185 gfc_constructor
*cons
= NULL
;
1186 gfc_component
*comp
;
1189 if (expr
&& expr
->expr_type
== EXPR_STRUCTURE
)
1190 cons
= gfc_constructor_first (expr
->value
.constructor
);
1195 comp
= derived
->components
;
1197 for (; comp
&& cons
; comp
= comp
->next
, cons
= gfc_constructor_next (cons
))
1200 && cons
->expr
->expr_type
== EXPR_STRUCTURE
1201 && comp
->ts
.type
== BT_DERIVED
)
1203 t
= get_pdt_constructor (cons
->expr
, NULL
, comp
->ts
.u
.derived
);
1207 else if (comp
->ts
.type
== BT_DERIVED
)
1209 t
= get_pdt_constructor (NULL
, &cons
, comp
->ts
.u
.derived
);
1213 else if ((comp
->attr
.pdt_kind
|| comp
->attr
.pdt_len
)
1214 && derived
->attr
.pdt_template
)
1216 t
= get_pdt_spec_expr (comp
, cons
->expr
);
1225 static bool resolve_fl_derived0 (gfc_symbol
*sym
);
1226 static bool resolve_fl_struct (gfc_symbol
*sym
);
1229 /* Resolve all of the elements of a structure constructor and make sure that
1230 the types are correct. The 'init' flag indicates that the given
1231 constructor is an initializer. */
1234 resolve_structure_cons (gfc_expr
*expr
, int init
)
1236 gfc_constructor
*cons
;
1237 gfc_component
*comp
;
1243 if (expr
->ts
.type
== BT_DERIVED
|| expr
->ts
.type
== BT_UNION
)
1245 if (expr
->ts
.u
.derived
->attr
.flavor
== FL_DERIVED
)
1246 resolve_fl_derived0 (expr
->ts
.u
.derived
);
1248 resolve_fl_struct (expr
->ts
.u
.derived
);
1250 /* If this is a Parameterized Derived Type template, find the
1251 instance corresponding to the PDT kind parameters. */
1252 if (expr
->ts
.u
.derived
->attr
.pdt_template
)
1255 t
= get_pdt_constructor (expr
, NULL
, expr
->ts
.u
.derived
);
1258 gfc_get_pdt_instance (param_list
, &expr
->ts
.u
.derived
, NULL
);
1260 expr
->param_list
= gfc_copy_actual_arglist (param_list
);
1263 gfc_free_actual_arglist (param_list
);
1265 if (!expr
->ts
.u
.derived
->attr
.pdt_type
)
1270 cons
= gfc_constructor_first (expr
->value
.constructor
);
1272 /* A constructor may have references if it is the result of substituting a
1273 parameter variable. In this case we just pull out the component we
1276 comp
= expr
->ref
->u
.c
.sym
->components
;
1278 comp
= expr
->ts
.u
.derived
->components
;
1280 for (; comp
&& cons
; comp
= comp
->next
, cons
= gfc_constructor_next (cons
))
1287 /* Unions use an EXPR_NULL contrived expression to tell the translation
1288 phase to generate an initializer of the appropriate length.
1290 if (cons
->expr
->ts
.type
== BT_UNION
&& cons
->expr
->expr_type
== EXPR_NULL
)
1293 if (!gfc_resolve_expr (cons
->expr
))
1299 rank
= comp
->as
? comp
->as
->rank
: 0;
1300 if (comp
->ts
.type
== BT_CLASS
1301 && !comp
->ts
.u
.derived
->attr
.unlimited_polymorphic
1302 && CLASS_DATA (comp
)->as
)
1303 rank
= CLASS_DATA (comp
)->as
->rank
;
1305 if (cons
->expr
->expr_type
!= EXPR_NULL
&& rank
!= cons
->expr
->rank
1306 && (comp
->attr
.allocatable
|| cons
->expr
->rank
))
1308 gfc_error ("The rank of the element in the structure "
1309 "constructor at %L does not match that of the "
1310 "component (%d/%d)", &cons
->expr
->where
,
1311 cons
->expr
->rank
, rank
);
1315 /* If we don't have the right type, try to convert it. */
1317 if (!comp
->attr
.proc_pointer
&&
1318 !gfc_compare_types (&cons
->expr
->ts
, &comp
->ts
))
1320 if (strcmp (comp
->name
, "_extends") == 0)
1322 /* Can afford to be brutal with the _extends initializer.
1323 The derived type can get lost because it is PRIVATE
1324 but it is not usage constrained by the standard. */
1325 cons
->expr
->ts
= comp
->ts
;
1327 else if (comp
->attr
.pointer
&& cons
->expr
->ts
.type
!= BT_UNKNOWN
)
1329 gfc_error ("The element in the structure constructor at %L, "
1330 "for pointer component %qs, is %s but should be %s",
1331 &cons
->expr
->where
, comp
->name
,
1332 gfc_basic_typename (cons
->expr
->ts
.type
),
1333 gfc_basic_typename (comp
->ts
.type
));
1338 bool t2
= gfc_convert_type (cons
->expr
, &comp
->ts
, 1);
1344 /* For strings, the length of the constructor should be the same as
1345 the one of the structure, ensure this if the lengths are known at
1346 compile time and when we are dealing with PARAMETER or structure
1348 if (cons
->expr
->ts
.type
== BT_CHARACTER
&& comp
->ts
.u
.cl
1349 && comp
->ts
.u
.cl
->length
1350 && comp
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
1351 && cons
->expr
->ts
.u
.cl
&& cons
->expr
->ts
.u
.cl
->length
1352 && cons
->expr
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
1353 && cons
->expr
->rank
!= 0
1354 && mpz_cmp (cons
->expr
->ts
.u
.cl
->length
->value
.integer
,
1355 comp
->ts
.u
.cl
->length
->value
.integer
) != 0)
1357 if (cons
->expr
->expr_type
== EXPR_VARIABLE
1358 && cons
->expr
->symtree
->n
.sym
->attr
.flavor
== FL_PARAMETER
)
1360 /* Wrap the parameter in an array constructor (EXPR_ARRAY)
1361 to make use of the gfc_resolve_character_array_constructor
1362 machinery. The expression is later simplified away to
1363 an array of string literals. */
1364 gfc_expr
*para
= cons
->expr
;
1365 cons
->expr
= gfc_get_expr ();
1366 cons
->expr
->ts
= para
->ts
;
1367 cons
->expr
->where
= para
->where
;
1368 cons
->expr
->expr_type
= EXPR_ARRAY
;
1369 cons
->expr
->rank
= para
->rank
;
1370 cons
->expr
->shape
= gfc_copy_shape (para
->shape
, para
->rank
);
1371 gfc_constructor_append_expr (&cons
->expr
->value
.constructor
,
1372 para
, &cons
->expr
->where
);
1375 if (cons
->expr
->expr_type
== EXPR_ARRAY
)
1377 /* Rely on the cleanup of the namespace to deal correctly with
1378 the old charlen. (There was a block here that attempted to
1379 remove the charlen but broke the chain in so doing.) */
1380 cons
->expr
->ts
.u
.cl
= gfc_new_charlen (gfc_current_ns
, NULL
);
1381 cons
->expr
->ts
.u
.cl
->length_from_typespec
= true;
1382 cons
->expr
->ts
.u
.cl
->length
= gfc_copy_expr (comp
->ts
.u
.cl
->length
);
1383 gfc_resolve_character_array_constructor (cons
->expr
);
1387 if (cons
->expr
->expr_type
== EXPR_NULL
1388 && !(comp
->attr
.pointer
|| comp
->attr
.allocatable
1389 || comp
->attr
.proc_pointer
|| comp
->ts
.f90_type
== BT_VOID
1390 || (comp
->ts
.type
== BT_CLASS
1391 && (CLASS_DATA (comp
)->attr
.class_pointer
1392 || CLASS_DATA (comp
)->attr
.allocatable
))))
1395 gfc_error ("The NULL in the structure constructor at %L is "
1396 "being applied to component %qs, which is neither "
1397 "a POINTER nor ALLOCATABLE", &cons
->expr
->where
,
1401 if (comp
->attr
.proc_pointer
&& comp
->ts
.interface
)
1403 /* Check procedure pointer interface. */
1404 gfc_symbol
*s2
= NULL
;
1409 c2
= gfc_get_proc_ptr_comp (cons
->expr
);
1412 s2
= c2
->ts
.interface
;
1415 else if (cons
->expr
->expr_type
== EXPR_FUNCTION
)
1417 s2
= cons
->expr
->symtree
->n
.sym
->result
;
1418 name
= cons
->expr
->symtree
->n
.sym
->result
->name
;
1420 else if (cons
->expr
->expr_type
!= EXPR_NULL
)
1422 s2
= cons
->expr
->symtree
->n
.sym
;
1423 name
= cons
->expr
->symtree
->n
.sym
->name
;
1426 if (s2
&& !gfc_compare_interfaces (comp
->ts
.interface
, s2
, name
, 0, 1,
1427 err
, sizeof (err
), NULL
, NULL
))
1429 gfc_error_opt (OPT_Wargument_mismatch
,
1430 "Interface mismatch for procedure-pointer "
1431 "component %qs in structure constructor at %L:"
1432 " %s", comp
->name
, &cons
->expr
->where
, err
);
1437 if (!comp
->attr
.pointer
|| comp
->attr
.proc_pointer
1438 || cons
->expr
->expr_type
== EXPR_NULL
)
1441 a
= gfc_expr_attr (cons
->expr
);
1443 if (!a
.pointer
&& !a
.target
)
1446 gfc_error ("The element in the structure constructor at %L, "
1447 "for pointer component %qs should be a POINTER or "
1448 "a TARGET", &cons
->expr
->where
, comp
->name
);
1453 /* F08:C461. Additional checks for pointer initialization. */
1457 gfc_error ("Pointer initialization target at %L "
1458 "must not be ALLOCATABLE", &cons
->expr
->where
);
1463 gfc_error ("Pointer initialization target at %L "
1464 "must have the SAVE attribute", &cons
->expr
->where
);
1468 /* F2003, C1272 (3). */
1469 bool impure
= cons
->expr
->expr_type
== EXPR_VARIABLE
1470 && (gfc_impure_variable (cons
->expr
->symtree
->n
.sym
)
1471 || gfc_is_coindexed (cons
->expr
));
1472 if (impure
&& gfc_pure (NULL
))
1475 gfc_error ("Invalid expression in the structure constructor for "
1476 "pointer component %qs at %L in PURE procedure",
1477 comp
->name
, &cons
->expr
->where
);
1481 gfc_unset_implicit_pure (NULL
);
1488 /****************** Expression name resolution ******************/
1490 /* Returns 0 if a symbol was not declared with a type or
1491 attribute declaration statement, nonzero otherwise. */
1494 was_declared (gfc_symbol
*sym
)
1500 if (!a
.implicit_type
&& sym
->ts
.type
!= BT_UNKNOWN
)
1503 if (a
.allocatable
|| a
.dimension
|| a
.dummy
|| a
.external
|| a
.intrinsic
1504 || a
.optional
|| a
.pointer
|| a
.save
|| a
.target
|| a
.volatile_
1505 || a
.value
|| a
.access
!= ACCESS_UNKNOWN
|| a
.intent
!= INTENT_UNKNOWN
1506 || a
.asynchronous
|| a
.codimension
)
1513 /* Determine if a symbol is generic or not. */
1516 generic_sym (gfc_symbol
*sym
)
1520 if (sym
->attr
.generic
||
1521 (sym
->attr
.intrinsic
&& gfc_generic_intrinsic (sym
->name
)))
1524 if (was_declared (sym
) || sym
->ns
->parent
== NULL
)
1527 gfc_find_symbol (sym
->name
, sym
->ns
->parent
, 1, &s
);
1534 return generic_sym (s
);
1541 /* Determine if a symbol is specific or not. */
1544 specific_sym (gfc_symbol
*sym
)
1548 if (sym
->attr
.if_source
== IFSRC_IFBODY
1549 || sym
->attr
.proc
== PROC_MODULE
1550 || sym
->attr
.proc
== PROC_INTERNAL
1551 || sym
->attr
.proc
== PROC_ST_FUNCTION
1552 || (sym
->attr
.intrinsic
&& gfc_specific_intrinsic (sym
->name
))
1553 || sym
->attr
.external
)
1556 if (was_declared (sym
) || sym
->ns
->parent
== NULL
)
1559 gfc_find_symbol (sym
->name
, sym
->ns
->parent
, 1, &s
);
1561 return (s
== NULL
) ? 0 : specific_sym (s
);
1565 /* Figure out if the procedure is specific, generic or unknown. */
1568 { PTYPE_GENERIC
= 1, PTYPE_SPECIFIC
, PTYPE_UNKNOWN
};
1571 procedure_kind (gfc_symbol
*sym
)
1573 if (generic_sym (sym
))
1574 return PTYPE_GENERIC
;
1576 if (specific_sym (sym
))
1577 return PTYPE_SPECIFIC
;
1579 return PTYPE_UNKNOWN
;
1582 /* Check references to assumed size arrays. The flag need_full_assumed_size
1583 is nonzero when matching actual arguments. */
1585 static int need_full_assumed_size
= 0;
1588 check_assumed_size_reference (gfc_symbol
*sym
, gfc_expr
*e
)
1590 if (need_full_assumed_size
|| !(sym
->as
&& sym
->as
->type
== AS_ASSUMED_SIZE
))
1593 /* FIXME: The comparison "e->ref->u.ar.type == AR_FULL" is wrong.
1594 What should it be? */
1595 if (e
->ref
&& (e
->ref
->u
.ar
.end
[e
->ref
->u
.ar
.as
->rank
- 1] == NULL
)
1596 && (e
->ref
->u
.ar
.as
->type
== AS_ASSUMED_SIZE
)
1597 && (e
->ref
->u
.ar
.type
== AR_FULL
))
1599 gfc_error ("The upper bound in the last dimension must "
1600 "appear in the reference to the assumed size "
1601 "array %qs at %L", sym
->name
, &e
->where
);
1608 /* Look for bad assumed size array references in argument expressions
1609 of elemental and array valued intrinsic procedures. Since this is
1610 called from procedure resolution functions, it only recurses at
1614 resolve_assumed_size_actual (gfc_expr
*e
)
1619 switch (e
->expr_type
)
1622 if (e
->symtree
&& check_assumed_size_reference (e
->symtree
->n
.sym
, e
))
1627 if (resolve_assumed_size_actual (e
->value
.op
.op1
)
1628 || resolve_assumed_size_actual (e
->value
.op
.op2
))
1639 /* Check a generic procedure, passed as an actual argument, to see if
1640 there is a matching specific name. If none, it is an error, and if
1641 more than one, the reference is ambiguous. */
1643 count_specific_procs (gfc_expr
*e
)
1650 sym
= e
->symtree
->n
.sym
;
1652 for (p
= sym
->generic
; p
; p
= p
->next
)
1653 if (strcmp (sym
->name
, p
->sym
->name
) == 0)
1655 e
->symtree
= gfc_find_symtree (p
->sym
->ns
->sym_root
,
1661 gfc_error ("%qs at %L is ambiguous", e
->symtree
->n
.sym
->name
,
1665 gfc_error ("GENERIC procedure %qs is not allowed as an actual "
1666 "argument at %L", sym
->name
, &e
->where
);
1672 /* See if a call to sym could possibly be a not allowed RECURSION because of
1673 a missing RECURSIVE declaration. This means that either sym is the current
1674 context itself, or sym is the parent of a contained procedure calling its
1675 non-RECURSIVE containing procedure.
1676 This also works if sym is an ENTRY. */
1679 is_illegal_recursion (gfc_symbol
* sym
, gfc_namespace
* context
)
1681 gfc_symbol
* proc_sym
;
1682 gfc_symbol
* context_proc
;
1683 gfc_namespace
* real_context
;
1685 if (sym
->attr
.flavor
== FL_PROGRAM
1686 || gfc_fl_struct (sym
->attr
.flavor
))
1689 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
);
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
);
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
8719 && CLASS_DATA (sym
) && CLASS_DATA (sym
)->as
)
8722 symbol_attribute attr
;
8723 /* The associated variable's type is still the array type
8724 correct this now. */
8725 gfc_typespec
*ts
= &target
->ts
;
8728 for (ref
= target
->ref
; ref
!= NULL
; ref
= ref
->next
)
8733 ts
= &ref
->u
.c
.component
->ts
;
8736 if (ts
->type
== BT_CLASS
)
8737 ts
= &ts
->u
.derived
->components
->ts
;
8743 /* Create a scalar instance of the current class type. Because the
8744 rank of a class array goes into its name, the type has to be
8745 rebuild. The alternative of (re-)setting just the attributes
8746 and as in the current type, destroys the type also in other
8750 sym
->ts
.type
= BT_CLASS
;
8751 attr
= CLASS_DATA (sym
)->attr
;
8753 attr
.associate_var
= 1;
8754 attr
.dimension
= attr
.codimension
= 0;
8755 attr
.class_pointer
= 1;
8756 if (!gfc_build_class_symbol (&sym
->ts
, &attr
, &as
))
8758 /* Make sure the _vptr is set. */
8759 c
= gfc_find_component (sym
->ts
.u
.derived
, "_vptr", true, true, NULL
);
8760 if (c
->ts
.u
.derived
== NULL
)
8761 c
->ts
.u
.derived
= gfc_find_derived_vtab (sym
->ts
.u
.derived
);
8762 CLASS_DATA (sym
)->attr
.pointer
= 1;
8763 CLASS_DATA (sym
)->attr
.class_pointer
= 1;
8764 gfc_set_sym_referenced (sym
->ts
.u
.derived
);
8765 gfc_commit_symbol (sym
->ts
.u
.derived
);
8766 /* _vptr now has the _vtab in it, change it to the _vtype. */
8767 if (c
->ts
.u
.derived
->attr
.vtab
)
8768 c
->ts
.u
.derived
= c
->ts
.u
.derived
->ts
.u
.derived
;
8769 c
->ts
.u
.derived
->ns
->types_resolved
= 0;
8770 resolve_types (c
->ts
.u
.derived
->ns
);
8774 /* Mark this as an associate variable. */
8775 sym
->attr
.associate_var
= 1;
8777 /* Fix up the type-spec for CHARACTER types. */
8778 if (sym
->ts
.type
== BT_CHARACTER
&& !sym
->attr
.select_type_temporary
)
8781 sym
->ts
.u
.cl
= target
->ts
.u
.cl
;
8783 if (sym
->ts
.deferred
&& target
->expr_type
== EXPR_VARIABLE
8784 && target
->symtree
->n
.sym
->attr
.dummy
8785 && sym
->ts
.u
.cl
== target
->ts
.u
.cl
)
8787 sym
->ts
.u
.cl
= gfc_new_charlen (sym
->ns
, NULL
);
8788 sym
->ts
.deferred
= 1;
8791 if (!sym
->ts
.u
.cl
->length
8792 && !sym
->ts
.deferred
8793 && target
->expr_type
== EXPR_CONSTANT
)
8795 sym
->ts
.u
.cl
->length
=
8796 gfc_get_int_expr (gfc_charlen_int_kind
, NULL
,
8797 target
->value
.character
.length
);
8799 else if ((!sym
->ts
.u
.cl
->length
8800 || sym
->ts
.u
.cl
->length
->expr_type
!= EXPR_CONSTANT
)
8801 && target
->expr_type
!= EXPR_VARIABLE
)
8803 sym
->ts
.u
.cl
= gfc_new_charlen (sym
->ns
, NULL
);
8804 sym
->ts
.deferred
= 1;
8806 /* This is reset in trans-stmt.c after the assignment
8807 of the target expression to the associate name. */
8808 sym
->attr
.allocatable
= 1;
8812 /* If the target is a good class object, so is the associate variable. */
8813 if (sym
->ts
.type
== BT_CLASS
&& gfc_expr_attr (target
).class_ok
)
8814 sym
->attr
.class_ok
= 1;
8818 /* Ensure that SELECT TYPE expressions have the correct rank and a full
8819 array reference, where necessary. The symbols are artificial and so
8820 the dimension attribute and arrayspec can also be set. In addition,
8821 sometimes the expr1 arrives as BT_DERIVED, when the symbol is BT_CLASS.
8822 This is corrected here as well.*/
8825 fixup_array_ref (gfc_expr
**expr1
, gfc_expr
*expr2
,
8826 int rank
, gfc_ref
*ref
)
8828 gfc_ref
*nref
= (*expr1
)->ref
;
8829 gfc_symbol
*sym1
= (*expr1
)->symtree
->n
.sym
;
8830 gfc_symbol
*sym2
= expr2
? expr2
->symtree
->n
.sym
: NULL
;
8831 (*expr1
)->rank
= rank
;
8832 if (sym1
->ts
.type
== BT_CLASS
)
8834 if ((*expr1
)->ts
.type
!= BT_CLASS
)
8835 (*expr1
)->ts
= sym1
->ts
;
8837 CLASS_DATA (sym1
)->attr
.dimension
= 1;
8838 if (CLASS_DATA (sym1
)->as
== NULL
&& sym2
)
8839 CLASS_DATA (sym1
)->as
8840 = gfc_copy_array_spec (CLASS_DATA (sym2
)->as
);
8844 sym1
->attr
.dimension
= 1;
8845 if (sym1
->as
== NULL
&& sym2
)
8846 sym1
->as
= gfc_copy_array_spec (sym2
->as
);
8849 for (; nref
; nref
= nref
->next
)
8850 if (nref
->next
== NULL
)
8853 if (ref
&& nref
&& nref
->type
!= REF_ARRAY
)
8854 nref
->next
= gfc_copy_ref (ref
);
8855 else if (ref
&& !nref
)
8856 (*expr1
)->ref
= gfc_copy_ref (ref
);
8861 build_loc_call (gfc_expr
*sym_expr
)
8864 loc_call
= gfc_get_expr ();
8865 loc_call
->expr_type
= EXPR_FUNCTION
;
8866 gfc_get_sym_tree ("_loc", gfc_current_ns
, &loc_call
->symtree
, false);
8867 loc_call
->symtree
->n
.sym
->attr
.flavor
= FL_PROCEDURE
;
8868 loc_call
->symtree
->n
.sym
->attr
.intrinsic
= 1;
8869 loc_call
->symtree
->n
.sym
->result
= loc_call
->symtree
->n
.sym
;
8870 gfc_commit_symbol (loc_call
->symtree
->n
.sym
);
8871 loc_call
->ts
.type
= BT_INTEGER
;
8872 loc_call
->ts
.kind
= gfc_index_integer_kind
;
8873 loc_call
->value
.function
.isym
= gfc_intrinsic_function_by_id (GFC_ISYM_LOC
);
8874 loc_call
->value
.function
.actual
= gfc_get_actual_arglist ();
8875 loc_call
->value
.function
.actual
->expr
= sym_expr
;
8876 loc_call
->where
= sym_expr
->where
;
8880 /* Resolve a SELECT TYPE statement. */
8883 resolve_select_type (gfc_code
*code
, gfc_namespace
*old_ns
)
8885 gfc_symbol
*selector_type
;
8886 gfc_code
*body
, *new_st
, *if_st
, *tail
;
8887 gfc_code
*class_is
= NULL
, *default_case
= NULL
;
8890 char name
[GFC_MAX_SYMBOL_LEN
];
8894 gfc_ref
* ref
= NULL
;
8895 gfc_expr
*selector_expr
= NULL
;
8897 ns
= code
->ext
.block
.ns
;
8900 /* Check for F03:C813. */
8901 if (code
->expr1
->ts
.type
!= BT_CLASS
8902 && !(code
->expr2
&& code
->expr2
->ts
.type
== BT_CLASS
))
8904 gfc_error ("Selector shall be polymorphic in SELECT TYPE statement "
8905 "at %L", &code
->loc
);
8909 if (!code
->expr1
->symtree
->n
.sym
->attr
.class_ok
)
8914 gfc_ref
*ref2
= NULL
;
8915 for (ref
= code
->expr2
->ref
; ref
!= NULL
; ref
= ref
->next
)
8916 if (ref
->type
== REF_COMPONENT
8917 && ref
->u
.c
.component
->ts
.type
== BT_CLASS
)
8922 if (code
->expr1
->symtree
->n
.sym
->attr
.untyped
)
8923 code
->expr1
->symtree
->n
.sym
->ts
= ref2
->u
.c
.component
->ts
;
8924 selector_type
= CLASS_DATA (ref2
->u
.c
.component
)->ts
.u
.derived
;
8928 if (code
->expr1
->symtree
->n
.sym
->attr
.untyped
)
8929 code
->expr1
->symtree
->n
.sym
->ts
= code
->expr2
->ts
;
8930 selector_type
= CLASS_DATA (code
->expr2
)->ts
.u
.derived
;
8933 if (code
->expr2
->rank
&& CLASS_DATA (code
->expr1
)->as
)
8934 CLASS_DATA (code
->expr1
)->as
->rank
= code
->expr2
->rank
;
8936 /* F2008: C803 The selector expression must not be coindexed. */
8937 if (gfc_is_coindexed (code
->expr2
))
8939 gfc_error ("Selector at %L must not be coindexed",
8940 &code
->expr2
->where
);
8947 selector_type
= CLASS_DATA (code
->expr1
)->ts
.u
.derived
;
8949 if (gfc_is_coindexed (code
->expr1
))
8951 gfc_error ("Selector at %L must not be coindexed",
8952 &code
->expr1
->where
);
8957 /* Loop over TYPE IS / CLASS IS cases. */
8958 for (body
= code
->block
; body
; body
= body
->block
)
8960 c
= body
->ext
.block
.case_list
;
8964 /* Check for repeated cases. */
8965 for (tail
= code
->block
; tail
; tail
= tail
->block
)
8967 gfc_case
*d
= tail
->ext
.block
.case_list
;
8971 if (c
->ts
.type
== d
->ts
.type
8972 && ((c
->ts
.type
== BT_DERIVED
8973 && c
->ts
.u
.derived
&& d
->ts
.u
.derived
8974 && !strcmp (c
->ts
.u
.derived
->name
,
8975 d
->ts
.u
.derived
->name
))
8976 || c
->ts
.type
== BT_UNKNOWN
8977 || (!(c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
8978 && c
->ts
.kind
== d
->ts
.kind
)))
8980 gfc_error ("TYPE IS at %L overlaps with TYPE IS at %L",
8981 &c
->where
, &d
->where
);
8987 /* Check F03:C815. */
8988 if ((c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
8989 && !selector_type
->attr
.unlimited_polymorphic
8990 && !gfc_type_is_extensible (c
->ts
.u
.derived
))
8992 gfc_error ("Derived type %qs at %L must be extensible",
8993 c
->ts
.u
.derived
->name
, &c
->where
);
8998 /* Check F03:C816. */
8999 if (c
->ts
.type
!= BT_UNKNOWN
&& !selector_type
->attr
.unlimited_polymorphic
9000 && ((c
->ts
.type
!= BT_DERIVED
&& c
->ts
.type
!= BT_CLASS
)
9001 || !gfc_type_is_extension_of (selector_type
, c
->ts
.u
.derived
)))
9003 if (c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
9004 gfc_error ("Derived type %qs at %L must be an extension of %qs",
9005 c
->ts
.u
.derived
->name
, &c
->where
, selector_type
->name
);
9007 gfc_error ("Unexpected intrinsic type %qs at %L",
9008 gfc_basic_typename (c
->ts
.type
), &c
->where
);
9013 /* Check F03:C814. */
9014 if (c
->ts
.type
== BT_CHARACTER
9015 && (c
->ts
.u
.cl
->length
!= NULL
|| c
->ts
.deferred
))
9017 gfc_error ("The type-spec at %L shall specify that each length "
9018 "type parameter is assumed", &c
->where
);
9023 /* Intercept the DEFAULT case. */
9024 if (c
->ts
.type
== BT_UNKNOWN
)
9026 /* Check F03:C818. */
9029 gfc_error ("The DEFAULT CASE at %L cannot be followed "
9030 "by a second DEFAULT CASE at %L",
9031 &default_case
->ext
.block
.case_list
->where
, &c
->where
);
9036 default_case
= body
;
9043 /* Transform SELECT TYPE statement to BLOCK and associate selector to
9044 target if present. If there are any EXIT statements referring to the
9045 SELECT TYPE construct, this is no problem because the gfc_code
9046 reference stays the same and EXIT is equally possible from the BLOCK
9047 it is changed to. */
9048 code
->op
= EXEC_BLOCK
;
9051 gfc_association_list
* assoc
;
9053 assoc
= gfc_get_association_list ();
9054 assoc
->st
= code
->expr1
->symtree
;
9055 assoc
->target
= gfc_copy_expr (code
->expr2
);
9056 assoc
->target
->where
= code
->expr2
->where
;
9057 /* assoc->variable will be set by resolve_assoc_var. */
9059 code
->ext
.block
.assoc
= assoc
;
9060 code
->expr1
->symtree
->n
.sym
->assoc
= assoc
;
9062 resolve_assoc_var (code
->expr1
->symtree
->n
.sym
, false);
9065 code
->ext
.block
.assoc
= NULL
;
9067 /* Ensure that the selector rank and arrayspec are available to
9068 correct expressions in which they might be missing. */
9069 if (code
->expr2
&& code
->expr2
->rank
)
9071 rank
= code
->expr2
->rank
;
9072 for (ref
= code
->expr2
->ref
; ref
; ref
= ref
->next
)
9073 if (ref
->next
== NULL
)
9075 if (ref
&& ref
->type
== REF_ARRAY
)
9076 ref
= gfc_copy_ref (ref
);
9078 /* Fixup expr1 if necessary. */
9080 fixup_array_ref (&code
->expr1
, code
->expr2
, rank
, ref
);
9082 else if (code
->expr1
->rank
)
9084 rank
= code
->expr1
->rank
;
9085 for (ref
= code
->expr1
->ref
; ref
; ref
= ref
->next
)
9086 if (ref
->next
== NULL
)
9088 if (ref
&& ref
->type
== REF_ARRAY
)
9089 ref
= gfc_copy_ref (ref
);
9092 /* Add EXEC_SELECT to switch on type. */
9093 new_st
= gfc_get_code (code
->op
);
9094 new_st
->expr1
= code
->expr1
;
9095 new_st
->expr2
= code
->expr2
;
9096 new_st
->block
= code
->block
;
9097 code
->expr1
= code
->expr2
= NULL
;
9102 ns
->code
->next
= new_st
;
9104 code
->op
= EXEC_SELECT_TYPE
;
9106 /* Use the intrinsic LOC function to generate an integer expression
9107 for the vtable of the selector. Note that the rank of the selector
9108 expression has to be set to zero. */
9109 gfc_add_vptr_component (code
->expr1
);
9110 code
->expr1
->rank
= 0;
9111 code
->expr1
= build_loc_call (code
->expr1
);
9112 selector_expr
= code
->expr1
->value
.function
.actual
->expr
;
9114 /* Loop over TYPE IS / CLASS IS cases. */
9115 for (body
= code
->block
; body
; body
= body
->block
)
9119 c
= body
->ext
.block
.case_list
;
9121 /* Generate an index integer expression for address of the
9122 TYPE/CLASS vtable and store it in c->low. The hash expression
9123 is stored in c->high and is used to resolve intrinsic cases. */
9124 if (c
->ts
.type
!= BT_UNKNOWN
)
9126 if (c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
9128 vtab
= gfc_find_derived_vtab (c
->ts
.u
.derived
);
9130 c
->high
= gfc_get_int_expr (gfc_integer_4_kind
, NULL
,
9131 c
->ts
.u
.derived
->hash_value
);
9135 vtab
= gfc_find_vtab (&c
->ts
);
9136 gcc_assert (vtab
&& CLASS_DATA (vtab
)->initializer
);
9137 e
= CLASS_DATA (vtab
)->initializer
;
9138 c
->high
= gfc_copy_expr (e
);
9139 if (c
->high
->ts
.kind
!= gfc_integer_4_kind
)
9142 ts
.kind
= gfc_integer_4_kind
;
9143 ts
.type
= BT_INTEGER
;
9144 gfc_convert_type_warn (c
->high
, &ts
, 2, 0);
9148 e
= gfc_lval_expr_from_sym (vtab
);
9149 c
->low
= build_loc_call (e
);
9154 /* Associate temporary to selector. This should only be done
9155 when this case is actually true, so build a new ASSOCIATE
9156 that does precisely this here (instead of using the
9159 if (c
->ts
.type
== BT_CLASS
)
9160 sprintf (name
, "__tmp_class_%s", c
->ts
.u
.derived
->name
);
9161 else if (c
->ts
.type
== BT_DERIVED
)
9162 sprintf (name
, "__tmp_type_%s", c
->ts
.u
.derived
->name
);
9163 else if (c
->ts
.type
== BT_CHARACTER
)
9165 HOST_WIDE_INT charlen
= 0;
9166 if (c
->ts
.u
.cl
&& c
->ts
.u
.cl
->length
9167 && c
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
)
9168 charlen
= gfc_mpz_get_hwi (c
->ts
.u
.cl
->length
->value
.integer
);
9169 snprintf (name
, sizeof (name
),
9170 "__tmp_%s_" HOST_WIDE_INT_PRINT_DEC
"_%d",
9171 gfc_basic_typename (c
->ts
.type
), charlen
, c
->ts
.kind
);
9174 sprintf (name
, "__tmp_%s_%d", gfc_basic_typename (c
->ts
.type
),
9177 st
= gfc_find_symtree (ns
->sym_root
, name
);
9178 gcc_assert (st
->n
.sym
->assoc
);
9179 st
->n
.sym
->assoc
->target
= gfc_get_variable_expr (selector_expr
->symtree
);
9180 st
->n
.sym
->assoc
->target
->where
= selector_expr
->where
;
9181 if (c
->ts
.type
!= BT_CLASS
&& c
->ts
.type
!= BT_UNKNOWN
)
9183 gfc_add_data_component (st
->n
.sym
->assoc
->target
);
9184 /* Fixup the target expression if necessary. */
9186 fixup_array_ref (&st
->n
.sym
->assoc
->target
, NULL
, rank
, ref
);
9189 new_st
= gfc_get_code (EXEC_BLOCK
);
9190 new_st
->ext
.block
.ns
= gfc_build_block_ns (ns
);
9191 new_st
->ext
.block
.ns
->code
= body
->next
;
9192 body
->next
= new_st
;
9194 /* Chain in the new list only if it is marked as dangling. Otherwise
9195 there is a CASE label overlap and this is already used. Just ignore,
9196 the error is diagnosed elsewhere. */
9197 if (st
->n
.sym
->assoc
->dangling
)
9199 new_st
->ext
.block
.assoc
= st
->n
.sym
->assoc
;
9200 st
->n
.sym
->assoc
->dangling
= 0;
9203 resolve_assoc_var (st
->n
.sym
, false);
9206 /* Take out CLASS IS cases for separate treatment. */
9208 while (body
&& body
->block
)
9210 if (body
->block
->ext
.block
.case_list
->ts
.type
== BT_CLASS
)
9212 /* Add to class_is list. */
9213 if (class_is
== NULL
)
9215 class_is
= body
->block
;
9220 for (tail
= class_is
; tail
->block
; tail
= tail
->block
) ;
9221 tail
->block
= body
->block
;
9224 /* Remove from EXEC_SELECT list. */
9225 body
->block
= body
->block
->block
;
9238 /* Add a default case to hold the CLASS IS cases. */
9239 for (tail
= code
; tail
->block
; tail
= tail
->block
) ;
9240 tail
->block
= gfc_get_code (EXEC_SELECT_TYPE
);
9242 tail
->ext
.block
.case_list
= gfc_get_case ();
9243 tail
->ext
.block
.case_list
->ts
.type
= BT_UNKNOWN
;
9245 default_case
= tail
;
9248 /* More than one CLASS IS block? */
9249 if (class_is
->block
)
9253 /* Sort CLASS IS blocks by extension level. */
9257 for (c1
= &class_is
; (*c1
) && (*c1
)->block
; c1
= &((*c1
)->block
))
9260 /* F03:C817 (check for doubles). */
9261 if ((*c1
)->ext
.block
.case_list
->ts
.u
.derived
->hash_value
9262 == c2
->ext
.block
.case_list
->ts
.u
.derived
->hash_value
)
9264 gfc_error ("Double CLASS IS block in SELECT TYPE "
9266 &c2
->ext
.block
.case_list
->where
);
9269 if ((*c1
)->ext
.block
.case_list
->ts
.u
.derived
->attr
.extension
9270 < c2
->ext
.block
.case_list
->ts
.u
.derived
->attr
.extension
)
9273 (*c1
)->block
= c2
->block
;
9283 /* Generate IF chain. */
9284 if_st
= gfc_get_code (EXEC_IF
);
9286 for (body
= class_is
; body
; body
= body
->block
)
9288 new_st
->block
= gfc_get_code (EXEC_IF
);
9289 new_st
= new_st
->block
;
9290 /* Set up IF condition: Call _gfortran_is_extension_of. */
9291 new_st
->expr1
= gfc_get_expr ();
9292 new_st
->expr1
->expr_type
= EXPR_FUNCTION
;
9293 new_st
->expr1
->ts
.type
= BT_LOGICAL
;
9294 new_st
->expr1
->ts
.kind
= 4;
9295 new_st
->expr1
->value
.function
.name
= gfc_get_string (PREFIX ("is_extension_of"));
9296 new_st
->expr1
->value
.function
.isym
= XCNEW (gfc_intrinsic_sym
);
9297 new_st
->expr1
->value
.function
.isym
->id
= GFC_ISYM_EXTENDS_TYPE_OF
;
9298 /* Set up arguments. */
9299 new_st
->expr1
->value
.function
.actual
= gfc_get_actual_arglist ();
9300 new_st
->expr1
->value
.function
.actual
->expr
= gfc_get_variable_expr (selector_expr
->symtree
);
9301 new_st
->expr1
->value
.function
.actual
->expr
->where
= code
->loc
;
9302 new_st
->expr1
->where
= code
->loc
;
9303 gfc_add_vptr_component (new_st
->expr1
->value
.function
.actual
->expr
);
9304 vtab
= gfc_find_derived_vtab (body
->ext
.block
.case_list
->ts
.u
.derived
);
9305 st
= gfc_find_symtree (vtab
->ns
->sym_root
, vtab
->name
);
9306 new_st
->expr1
->value
.function
.actual
->next
= gfc_get_actual_arglist ();
9307 new_st
->expr1
->value
.function
.actual
->next
->expr
= gfc_get_variable_expr (st
);
9308 new_st
->expr1
->value
.function
.actual
->next
->expr
->where
= code
->loc
;
9309 new_st
->next
= body
->next
;
9311 if (default_case
->next
)
9313 new_st
->block
= gfc_get_code (EXEC_IF
);
9314 new_st
= new_st
->block
;
9315 new_st
->next
= default_case
->next
;
9318 /* Replace CLASS DEFAULT code by the IF chain. */
9319 default_case
->next
= if_st
;
9322 /* Resolve the internal code. This cannot be done earlier because
9323 it requires that the sym->assoc of selectors is set already. */
9324 gfc_current_ns
= ns
;
9325 gfc_resolve_blocks (code
->block
, gfc_current_ns
);
9326 gfc_current_ns
= old_ns
;
9333 /* Resolve a transfer statement. This is making sure that:
9334 -- a derived type being transferred has only non-pointer components
9335 -- a derived type being transferred doesn't have private components, unless
9336 it's being transferred from the module where the type was defined
9337 -- we're not trying to transfer a whole assumed size array. */
9340 resolve_transfer (gfc_code
*code
)
9342 gfc_symbol
*sym
, *derived
;
9346 bool formatted
= false;
9347 gfc_dt
*dt
= code
->ext
.dt
;
9348 gfc_symbol
*dtio_sub
= NULL
;
9352 while (exp
!= NULL
&& exp
->expr_type
== EXPR_OP
9353 && exp
->value
.op
.op
== INTRINSIC_PARENTHESES
)
9354 exp
= exp
->value
.op
.op1
;
9356 if (exp
&& exp
->expr_type
== EXPR_NULL
9359 gfc_error ("Invalid context for NULL () intrinsic at %L",
9364 if (exp
== NULL
|| (exp
->expr_type
!= EXPR_VARIABLE
9365 && exp
->expr_type
!= EXPR_FUNCTION
9366 && exp
->expr_type
!= EXPR_STRUCTURE
))
9369 /* If we are reading, the variable will be changed. Note that
9370 code->ext.dt may be NULL if the TRANSFER is related to
9371 an INQUIRE statement -- but in this case, we are not reading, either. */
9372 if (dt
&& dt
->dt_io_kind
->value
.iokind
== M_READ
9373 && !gfc_check_vardef_context (exp
, false, false, false,
9377 const gfc_typespec
*ts
= exp
->expr_type
== EXPR_STRUCTURE
9378 || exp
->expr_type
== EXPR_FUNCTION
9379 ? &exp
->ts
: &exp
->symtree
->n
.sym
->ts
;
9381 /* Go to actual component transferred. */
9382 for (ref
= exp
->ref
; ref
; ref
= ref
->next
)
9383 if (ref
->type
== REF_COMPONENT
)
9384 ts
= &ref
->u
.c
.component
->ts
;
9386 if (dt
&& dt
->dt_io_kind
->value
.iokind
!= M_INQUIRE
9387 && (ts
->type
== BT_DERIVED
|| ts
->type
== BT_CLASS
))
9389 derived
= ts
->u
.derived
;
9391 /* Determine when to use the formatted DTIO procedure. */
9392 if (dt
&& (dt
->format_expr
|| dt
->format_label
))
9395 write
= dt
->dt_io_kind
->value
.iokind
== M_WRITE
9396 || dt
->dt_io_kind
->value
.iokind
== M_PRINT
;
9397 dtio_sub
= gfc_find_specific_dtio_proc (derived
, write
, formatted
);
9399 if (dtio_sub
!= NULL
&& exp
->expr_type
== EXPR_VARIABLE
)
9402 sym
= exp
->symtree
->n
.sym
->ns
->proc_name
;
9403 /* Check to see if this is a nested DTIO call, with the
9404 dummy as the io-list object. */
9405 if (sym
&& sym
== dtio_sub
&& sym
->formal
9406 && sym
->formal
->sym
== exp
->symtree
->n
.sym
9407 && exp
->ref
== NULL
)
9409 if (!sym
->attr
.recursive
)
9411 gfc_error ("DTIO %s procedure at %L must be recursive",
9412 sym
->name
, &sym
->declared_at
);
9419 if (ts
->type
== BT_CLASS
&& dtio_sub
== NULL
)
9421 gfc_error ("Data transfer element at %L cannot be polymorphic unless "
9422 "it is processed by a defined input/output procedure",
9427 if (ts
->type
== BT_DERIVED
)
9429 /* Check that transferred derived type doesn't contain POINTER
9430 components unless it is processed by a defined input/output
9432 if (ts
->u
.derived
->attr
.pointer_comp
&& dtio_sub
== NULL
)
9434 gfc_error ("Data transfer element at %L cannot have POINTER "
9435 "components unless it is processed by a defined "
9436 "input/output procedure", &code
->loc
);
9441 if (ts
->u
.derived
->attr
.proc_pointer_comp
)
9443 gfc_error ("Data transfer element at %L cannot have "
9444 "procedure pointer components", &code
->loc
);
9448 if (ts
->u
.derived
->attr
.alloc_comp
&& dtio_sub
== NULL
)
9450 gfc_error ("Data transfer element at %L cannot have ALLOCATABLE "
9451 "components unless it is processed by a defined "
9452 "input/output procedure", &code
->loc
);
9456 /* C_PTR and C_FUNPTR have private components which means they cannot
9457 be printed. However, if -std=gnu and not -pedantic, allow
9458 the component to be printed to help debugging. */
9459 if (ts
->u
.derived
->ts
.f90_type
== BT_VOID
)
9461 if (!gfc_notify_std (GFC_STD_GNU
, "Data transfer element at %L "
9462 "cannot have PRIVATE components", &code
->loc
))
9465 else if (derived_inaccessible (ts
->u
.derived
) && dtio_sub
== NULL
)
9467 gfc_error ("Data transfer element at %L cannot have "
9468 "PRIVATE components unless it is processed by "
9469 "a defined input/output procedure", &code
->loc
);
9474 if (exp
->expr_type
== EXPR_STRUCTURE
)
9477 sym
= exp
->symtree
->n
.sym
;
9479 if (sym
->as
!= NULL
&& sym
->as
->type
== AS_ASSUMED_SIZE
&& exp
->ref
9480 && exp
->ref
->type
== REF_ARRAY
&& exp
->ref
->u
.ar
.type
== AR_FULL
)
9482 gfc_error ("Data transfer element at %L cannot be a full reference to "
9483 "an assumed-size array", &code
->loc
);
9487 if (async_io_dt
&& exp
->expr_type
== EXPR_VARIABLE
)
9488 exp
->symtree
->n
.sym
->attr
.asynchronous
= 1;
9492 /*********** Toplevel code resolution subroutines ***********/
9494 /* Find the set of labels that are reachable from this block. We also
9495 record the last statement in each block. */
9498 find_reachable_labels (gfc_code
*block
)
9505 cs_base
->reachable_labels
= bitmap_alloc (&labels_obstack
);
9507 /* Collect labels in this block. We don't keep those corresponding
9508 to END {IF|SELECT}, these are checked in resolve_branch by going
9509 up through the code_stack. */
9510 for (c
= block
; c
; c
= c
->next
)
9512 if (c
->here
&& c
->op
!= EXEC_END_NESTED_BLOCK
)
9513 bitmap_set_bit (cs_base
->reachable_labels
, c
->here
->value
);
9516 /* Merge with labels from parent block. */
9519 gcc_assert (cs_base
->prev
->reachable_labels
);
9520 bitmap_ior_into (cs_base
->reachable_labels
,
9521 cs_base
->prev
->reachable_labels
);
9527 resolve_lock_unlock_event (gfc_code
*code
)
9529 if (code
->expr1
->expr_type
== EXPR_FUNCTION
9530 && code
->expr1
->value
.function
.isym
9531 && code
->expr1
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
)
9532 remove_caf_get_intrinsic (code
->expr1
);
9534 if ((code
->op
== EXEC_LOCK
|| code
->op
== EXEC_UNLOCK
)
9535 && (code
->expr1
->ts
.type
!= BT_DERIVED
9536 || code
->expr1
->expr_type
!= EXPR_VARIABLE
9537 || code
->expr1
->ts
.u
.derived
->from_intmod
!= INTMOD_ISO_FORTRAN_ENV
9538 || code
->expr1
->ts
.u
.derived
->intmod_sym_id
!= ISOFORTRAN_LOCK_TYPE
9539 || code
->expr1
->rank
!= 0
9540 || (!gfc_is_coarray (code
->expr1
) &&
9541 !gfc_is_coindexed (code
->expr1
))))
9542 gfc_error ("Lock variable at %L must be a scalar of type LOCK_TYPE",
9543 &code
->expr1
->where
);
9544 else if ((code
->op
== EXEC_EVENT_POST
|| code
->op
== EXEC_EVENT_WAIT
)
9545 && (code
->expr1
->ts
.type
!= BT_DERIVED
9546 || code
->expr1
->expr_type
!= EXPR_VARIABLE
9547 || code
->expr1
->ts
.u
.derived
->from_intmod
9548 != INTMOD_ISO_FORTRAN_ENV
9549 || code
->expr1
->ts
.u
.derived
->intmod_sym_id
9550 != ISOFORTRAN_EVENT_TYPE
9551 || code
->expr1
->rank
!= 0))
9552 gfc_error ("Event variable at %L must be a scalar of type EVENT_TYPE",
9553 &code
->expr1
->where
);
9554 else if (code
->op
== EXEC_EVENT_POST
&& !gfc_is_coarray (code
->expr1
)
9555 && !gfc_is_coindexed (code
->expr1
))
9556 gfc_error ("Event variable argument at %L must be a coarray or coindexed",
9557 &code
->expr1
->where
);
9558 else if (code
->op
== EXEC_EVENT_WAIT
&& !gfc_is_coarray (code
->expr1
))
9559 gfc_error ("Event variable argument at %L must be a coarray but not "
9560 "coindexed", &code
->expr1
->where
);
9564 && (code
->expr2
->ts
.type
!= BT_INTEGER
|| code
->expr2
->rank
!= 0
9565 || code
->expr2
->expr_type
!= EXPR_VARIABLE
))
9566 gfc_error ("STAT= argument at %L must be a scalar INTEGER variable",
9567 &code
->expr2
->where
);
9570 && !gfc_check_vardef_context (code
->expr2
, false, false, false,
9571 _("STAT variable")))
9576 && (code
->expr3
->ts
.type
!= BT_CHARACTER
|| code
->expr3
->rank
!= 0
9577 || code
->expr3
->expr_type
!= EXPR_VARIABLE
))
9578 gfc_error ("ERRMSG= argument at %L must be a scalar CHARACTER variable",
9579 &code
->expr3
->where
);
9582 && !gfc_check_vardef_context (code
->expr3
, false, false, false,
9583 _("ERRMSG variable")))
9586 /* Check for LOCK the ACQUIRED_LOCK. */
9587 if (code
->op
!= EXEC_EVENT_WAIT
&& code
->expr4
9588 && (code
->expr4
->ts
.type
!= BT_LOGICAL
|| code
->expr4
->rank
!= 0
9589 || code
->expr4
->expr_type
!= EXPR_VARIABLE
))
9590 gfc_error ("ACQUIRED_LOCK= argument at %L must be a scalar LOGICAL "
9591 "variable", &code
->expr4
->where
);
9593 if (code
->op
!= EXEC_EVENT_WAIT
&& code
->expr4
9594 && !gfc_check_vardef_context (code
->expr4
, false, false, false,
9595 _("ACQUIRED_LOCK variable")))
9598 /* Check for EVENT WAIT the UNTIL_COUNT. */
9599 if (code
->op
== EXEC_EVENT_WAIT
&& code
->expr4
)
9601 if (!gfc_resolve_expr (code
->expr4
) || code
->expr4
->ts
.type
!= BT_INTEGER
9602 || code
->expr4
->rank
!= 0)
9603 gfc_error ("UNTIL_COUNT= argument at %L must be a scalar INTEGER "
9604 "expression", &code
->expr4
->where
);
9610 resolve_critical (gfc_code
*code
)
9612 gfc_symtree
*symtree
;
9613 gfc_symbol
*lock_type
;
9614 char name
[GFC_MAX_SYMBOL_LEN
];
9615 static int serial
= 0;
9617 if (flag_coarray
!= GFC_FCOARRAY_LIB
)
9620 symtree
= gfc_find_symtree (gfc_current_ns
->sym_root
,
9621 GFC_PREFIX ("lock_type"));
9623 lock_type
= symtree
->n
.sym
;
9626 if (gfc_get_sym_tree (GFC_PREFIX ("lock_type"), gfc_current_ns
, &symtree
,
9629 lock_type
= symtree
->n
.sym
;
9630 lock_type
->attr
.flavor
= FL_DERIVED
;
9631 lock_type
->attr
.zero_comp
= 1;
9632 lock_type
->from_intmod
= INTMOD_ISO_FORTRAN_ENV
;
9633 lock_type
->intmod_sym_id
= ISOFORTRAN_LOCK_TYPE
;
9636 sprintf(name
, GFC_PREFIX ("lock_var") "%d",serial
++);
9637 if (gfc_get_sym_tree (name
, gfc_current_ns
, &symtree
, false) != 0)
9640 code
->resolved_sym
= symtree
->n
.sym
;
9641 symtree
->n
.sym
->attr
.flavor
= FL_VARIABLE
;
9642 symtree
->n
.sym
->attr
.referenced
= 1;
9643 symtree
->n
.sym
->attr
.artificial
= 1;
9644 symtree
->n
.sym
->attr
.codimension
= 1;
9645 symtree
->n
.sym
->ts
.type
= BT_DERIVED
;
9646 symtree
->n
.sym
->ts
.u
.derived
= lock_type
;
9647 symtree
->n
.sym
->as
= gfc_get_array_spec ();
9648 symtree
->n
.sym
->as
->corank
= 1;
9649 symtree
->n
.sym
->as
->type
= AS_EXPLICIT
;
9650 symtree
->n
.sym
->as
->cotype
= AS_EXPLICIT
;
9651 symtree
->n
.sym
->as
->lower
[0] = gfc_get_int_expr (gfc_default_integer_kind
,
9653 gfc_commit_symbols();
9658 resolve_sync (gfc_code
*code
)
9660 /* Check imageset. The * case matches expr1 == NULL. */
9663 if (code
->expr1
->ts
.type
!= BT_INTEGER
|| code
->expr1
->rank
> 1)
9664 gfc_error ("Imageset argument at %L must be a scalar or rank-1 "
9665 "INTEGER expression", &code
->expr1
->where
);
9666 if (code
->expr1
->expr_type
== EXPR_CONSTANT
&& code
->expr1
->rank
== 0
9667 && mpz_cmp_si (code
->expr1
->value
.integer
, 1) < 0)
9668 gfc_error ("Imageset argument at %L must between 1 and num_images()",
9669 &code
->expr1
->where
);
9670 else if (code
->expr1
->expr_type
== EXPR_ARRAY
9671 && gfc_simplify_expr (code
->expr1
, 0))
9673 gfc_constructor
*cons
;
9674 cons
= gfc_constructor_first (code
->expr1
->value
.constructor
);
9675 for (; cons
; cons
= gfc_constructor_next (cons
))
9676 if (cons
->expr
->expr_type
== EXPR_CONSTANT
9677 && mpz_cmp_si (cons
->expr
->value
.integer
, 1) < 0)
9678 gfc_error ("Imageset argument at %L must between 1 and "
9679 "num_images()", &cons
->expr
->where
);
9684 gfc_resolve_expr (code
->expr2
);
9686 && (code
->expr2
->ts
.type
!= BT_INTEGER
|| code
->expr2
->rank
!= 0
9687 || code
->expr2
->expr_type
!= EXPR_VARIABLE
))
9688 gfc_error ("STAT= argument at %L must be a scalar INTEGER variable",
9689 &code
->expr2
->where
);
9692 gfc_resolve_expr (code
->expr3
);
9694 && (code
->expr3
->ts
.type
!= BT_CHARACTER
|| code
->expr3
->rank
!= 0
9695 || code
->expr3
->expr_type
!= EXPR_VARIABLE
))
9696 gfc_error ("ERRMSG= argument at %L must be a scalar CHARACTER variable",
9697 &code
->expr3
->where
);
9701 /* Given a branch to a label, see if the branch is conforming.
9702 The code node describes where the branch is located. */
9705 resolve_branch (gfc_st_label
*label
, gfc_code
*code
)
9712 /* Step one: is this a valid branching target? */
9714 if (label
->defined
== ST_LABEL_UNKNOWN
)
9716 gfc_error ("Label %d referenced at %L is never defined", label
->value
,
9721 if (label
->defined
!= ST_LABEL_TARGET
&& label
->defined
!= ST_LABEL_DO_TARGET
)
9723 gfc_error ("Statement at %L is not a valid branch target statement "
9724 "for the branch statement at %L", &label
->where
, &code
->loc
);
9728 /* Step two: make sure this branch is not a branch to itself ;-) */
9730 if (code
->here
== label
)
9733 "Branch at %L may result in an infinite loop", &code
->loc
);
9737 /* Step three: See if the label is in the same block as the
9738 branching statement. The hard work has been done by setting up
9739 the bitmap reachable_labels. */
9741 if (bitmap_bit_p (cs_base
->reachable_labels
, label
->value
))
9743 /* Check now whether there is a CRITICAL construct; if so, check
9744 whether the label is still visible outside of the CRITICAL block,
9745 which is invalid. */
9746 for (stack
= cs_base
; stack
; stack
= stack
->prev
)
9748 if (stack
->current
->op
== EXEC_CRITICAL
9749 && bitmap_bit_p (stack
->reachable_labels
, label
->value
))
9750 gfc_error ("GOTO statement at %L leaves CRITICAL construct for "
9751 "label at %L", &code
->loc
, &label
->where
);
9752 else if (stack
->current
->op
== EXEC_DO_CONCURRENT
9753 && bitmap_bit_p (stack
->reachable_labels
, label
->value
))
9754 gfc_error ("GOTO statement at %L leaves DO CONCURRENT construct "
9755 "for label at %L", &code
->loc
, &label
->where
);
9761 /* Step four: If we haven't found the label in the bitmap, it may
9762 still be the label of the END of the enclosing block, in which
9763 case we find it by going up the code_stack. */
9765 for (stack
= cs_base
; stack
; stack
= stack
->prev
)
9767 if (stack
->current
->next
&& stack
->current
->next
->here
== label
)
9769 if (stack
->current
->op
== EXEC_CRITICAL
)
9771 /* Note: A label at END CRITICAL does not leave the CRITICAL
9772 construct as END CRITICAL is still part of it. */
9773 gfc_error ("GOTO statement at %L leaves CRITICAL construct for label"
9774 " at %L", &code
->loc
, &label
->where
);
9777 else if (stack
->current
->op
== EXEC_DO_CONCURRENT
)
9779 gfc_error ("GOTO statement at %L leaves DO CONCURRENT construct for "
9780 "label at %L", &code
->loc
, &label
->where
);
9787 gcc_assert (stack
->current
->next
->op
== EXEC_END_NESTED_BLOCK
);
9791 /* The label is not in an enclosing block, so illegal. This was
9792 allowed in Fortran 66, so we allow it as extension. No
9793 further checks are necessary in this case. */
9794 gfc_notify_std (GFC_STD_LEGACY
, "Label at %L is not in the same block "
9795 "as the GOTO statement at %L", &label
->where
,
9801 /* Check whether EXPR1 has the same shape as EXPR2. */
9804 resolve_where_shape (gfc_expr
*expr1
, gfc_expr
*expr2
)
9806 mpz_t shape
[GFC_MAX_DIMENSIONS
];
9807 mpz_t shape2
[GFC_MAX_DIMENSIONS
];
9808 bool result
= false;
9811 /* Compare the rank. */
9812 if (expr1
->rank
!= expr2
->rank
)
9815 /* Compare the size of each dimension. */
9816 for (i
=0; i
<expr1
->rank
; i
++)
9818 if (!gfc_array_dimen_size (expr1
, i
, &shape
[i
]))
9821 if (!gfc_array_dimen_size (expr2
, i
, &shape2
[i
]))
9824 if (mpz_cmp (shape
[i
], shape2
[i
]))
9828 /* When either of the two expression is an assumed size array, we
9829 ignore the comparison of dimension sizes. */
9834 gfc_clear_shape (shape
, i
);
9835 gfc_clear_shape (shape2
, i
);
9840 /* Check whether a WHERE assignment target or a WHERE mask expression
9841 has the same shape as the outmost WHERE mask expression. */
9844 resolve_where (gfc_code
*code
, gfc_expr
*mask
)
9850 cblock
= code
->block
;
9852 /* Store the first WHERE mask-expr of the WHERE statement or construct.
9853 In case of nested WHERE, only the outmost one is stored. */
9854 if (mask
== NULL
) /* outmost WHERE */
9856 else /* inner WHERE */
9863 /* Check if the mask-expr has a consistent shape with the
9864 outmost WHERE mask-expr. */
9865 if (!resolve_where_shape (cblock
->expr1
, e
))
9866 gfc_error ("WHERE mask at %L has inconsistent shape",
9867 &cblock
->expr1
->where
);
9870 /* the assignment statement of a WHERE statement, or the first
9871 statement in where-body-construct of a WHERE construct */
9872 cnext
= cblock
->next
;
9877 /* WHERE assignment statement */
9880 /* Check shape consistent for WHERE assignment target. */
9881 if (e
&& !resolve_where_shape (cnext
->expr1
, e
))
9882 gfc_error ("WHERE assignment target at %L has "
9883 "inconsistent shape", &cnext
->expr1
->where
);
9887 case EXEC_ASSIGN_CALL
:
9888 resolve_call (cnext
);
9889 if (!cnext
->resolved_sym
->attr
.elemental
)
9890 gfc_error("Non-ELEMENTAL user-defined assignment in WHERE at %L",
9891 &cnext
->ext
.actual
->expr
->where
);
9894 /* WHERE or WHERE construct is part of a where-body-construct */
9896 resolve_where (cnext
, e
);
9900 gfc_error ("Unsupported statement inside WHERE at %L",
9903 /* the next statement within the same where-body-construct */
9904 cnext
= cnext
->next
;
9906 /* the next masked-elsewhere-stmt, elsewhere-stmt, or end-where-stmt */
9907 cblock
= cblock
->block
;
9912 /* Resolve assignment in FORALL construct.
9913 NVAR is the number of FORALL index variables, and VAR_EXPR records the
9914 FORALL index variables. */
9917 gfc_resolve_assign_in_forall (gfc_code
*code
, int nvar
, gfc_expr
**var_expr
)
9921 for (n
= 0; n
< nvar
; n
++)
9923 gfc_symbol
*forall_index
;
9925 forall_index
= var_expr
[n
]->symtree
->n
.sym
;
9927 /* Check whether the assignment target is one of the FORALL index
9929 if ((code
->expr1
->expr_type
== EXPR_VARIABLE
)
9930 && (code
->expr1
->symtree
->n
.sym
== forall_index
))
9931 gfc_error ("Assignment to a FORALL index variable at %L",
9932 &code
->expr1
->where
);
9935 /* If one of the FORALL index variables doesn't appear in the
9936 assignment variable, then there could be a many-to-one
9937 assignment. Emit a warning rather than an error because the
9938 mask could be resolving this problem. */
9939 if (!find_forall_index (code
->expr1
, forall_index
, 0))
9940 gfc_warning (0, "The FORALL with index %qs is not used on the "
9941 "left side of the assignment at %L and so might "
9942 "cause multiple assignment to this object",
9943 var_expr
[n
]->symtree
->name
, &code
->expr1
->where
);
9949 /* Resolve WHERE statement in FORALL construct. */
9952 gfc_resolve_where_code_in_forall (gfc_code
*code
, int nvar
,
9953 gfc_expr
**var_expr
)
9958 cblock
= code
->block
;
9961 /* the assignment statement of a WHERE statement, or the first
9962 statement in where-body-construct of a WHERE construct */
9963 cnext
= cblock
->next
;
9968 /* WHERE assignment statement */
9970 gfc_resolve_assign_in_forall (cnext
, nvar
, var_expr
);
9973 /* WHERE operator assignment statement */
9974 case EXEC_ASSIGN_CALL
:
9975 resolve_call (cnext
);
9976 if (!cnext
->resolved_sym
->attr
.elemental
)
9977 gfc_error("Non-ELEMENTAL user-defined assignment in WHERE at %L",
9978 &cnext
->ext
.actual
->expr
->where
);
9981 /* WHERE or WHERE construct is part of a where-body-construct */
9983 gfc_resolve_where_code_in_forall (cnext
, nvar
, var_expr
);
9987 gfc_error ("Unsupported statement inside WHERE at %L",
9990 /* the next statement within the same where-body-construct */
9991 cnext
= cnext
->next
;
9993 /* the next masked-elsewhere-stmt, elsewhere-stmt, or end-where-stmt */
9994 cblock
= cblock
->block
;
9999 /* Traverse the FORALL body to check whether the following errors exist:
10000 1. For assignment, check if a many-to-one assignment happens.
10001 2. For WHERE statement, check the WHERE body to see if there is any
10002 many-to-one assignment. */
10005 gfc_resolve_forall_body (gfc_code
*code
, int nvar
, gfc_expr
**var_expr
)
10009 c
= code
->block
->next
;
10015 case EXEC_POINTER_ASSIGN
:
10016 gfc_resolve_assign_in_forall (c
, nvar
, var_expr
);
10019 case EXEC_ASSIGN_CALL
:
10023 /* Because the gfc_resolve_blocks() will handle the nested FORALL,
10024 there is no need to handle it here. */
10028 gfc_resolve_where_code_in_forall(c
, nvar
, var_expr
);
10033 /* The next statement in the FORALL body. */
10039 /* Counts the number of iterators needed inside a forall construct, including
10040 nested forall constructs. This is used to allocate the needed memory
10041 in gfc_resolve_forall. */
10044 gfc_count_forall_iterators (gfc_code
*code
)
10046 int max_iters
, sub_iters
, current_iters
;
10047 gfc_forall_iterator
*fa
;
10049 gcc_assert(code
->op
== EXEC_FORALL
);
10053 for (fa
= code
->ext
.forall_iterator
; fa
; fa
= fa
->next
)
10056 code
= code
->block
->next
;
10060 if (code
->op
== EXEC_FORALL
)
10062 sub_iters
= gfc_count_forall_iterators (code
);
10063 if (sub_iters
> max_iters
)
10064 max_iters
= sub_iters
;
10069 return current_iters
+ max_iters
;
10073 /* Given a FORALL construct, first resolve the FORALL iterator, then call
10074 gfc_resolve_forall_body to resolve the FORALL body. */
10077 gfc_resolve_forall (gfc_code
*code
, gfc_namespace
*ns
, int forall_save
)
10079 static gfc_expr
**var_expr
;
10080 static int total_var
= 0;
10081 static int nvar
= 0;
10082 int i
, old_nvar
, tmp
;
10083 gfc_forall_iterator
*fa
;
10087 if (!gfc_notify_std (GFC_STD_F2018_OBS
, "FORALL construct at %L", &code
->loc
))
10090 /* Start to resolve a FORALL construct */
10091 if (forall_save
== 0)
10093 /* Count the total number of FORALL indices in the nested FORALL
10094 construct in order to allocate the VAR_EXPR with proper size. */
10095 total_var
= gfc_count_forall_iterators (code
);
10097 /* Allocate VAR_EXPR with NUMBER_OF_FORALL_INDEX elements. */
10098 var_expr
= XCNEWVEC (gfc_expr
*, total_var
);
10101 /* The information about FORALL iterator, including FORALL indices start, end
10102 and stride. An outer FORALL indice cannot appear in start, end or stride. */
10103 for (fa
= code
->ext
.forall_iterator
; fa
; fa
= fa
->next
)
10105 /* Fortran 20008: C738 (R753). */
10106 if (fa
->var
->ref
&& fa
->var
->ref
->type
== REF_ARRAY
)
10108 gfc_error ("FORALL index-name at %L must be a scalar variable "
10109 "of type integer", &fa
->var
->where
);
10113 /* Check if any outer FORALL index name is the same as the current
10115 for (i
= 0; i
< nvar
; i
++)
10117 if (fa
->var
->symtree
->n
.sym
== var_expr
[i
]->symtree
->n
.sym
)
10118 gfc_error ("An outer FORALL construct already has an index "
10119 "with this name %L", &fa
->var
->where
);
10122 /* Record the current FORALL index. */
10123 var_expr
[nvar
] = gfc_copy_expr (fa
->var
);
10127 /* No memory leak. */
10128 gcc_assert (nvar
<= total_var
);
10131 /* Resolve the FORALL body. */
10132 gfc_resolve_forall_body (code
, nvar
, var_expr
);
10134 /* May call gfc_resolve_forall to resolve the inner FORALL loop. */
10135 gfc_resolve_blocks (code
->block
, ns
);
10139 /* Free only the VAR_EXPRs allocated in this frame. */
10140 for (i
= nvar
; i
< tmp
; i
++)
10141 gfc_free_expr (var_expr
[i
]);
10145 /* We are in the outermost FORALL construct. */
10146 gcc_assert (forall_save
== 0);
10148 /* VAR_EXPR is not needed any more. */
10155 /* Resolve a BLOCK construct statement. */
10158 resolve_block_construct (gfc_code
* code
)
10160 /* Resolve the BLOCK's namespace. */
10161 gfc_resolve (code
->ext
.block
.ns
);
10163 /* For an ASSOCIATE block, the associations (and their targets) are already
10164 resolved during resolve_symbol. */
10168 /* Resolve lists of blocks found in IF, SELECT CASE, WHERE, FORALL, GOTO and
10172 gfc_resolve_blocks (gfc_code
*b
, gfc_namespace
*ns
)
10176 for (; b
; b
= b
->block
)
10178 t
= gfc_resolve_expr (b
->expr1
);
10179 if (!gfc_resolve_expr (b
->expr2
))
10185 if (t
&& b
->expr1
!= NULL
10186 && (b
->expr1
->ts
.type
!= BT_LOGICAL
|| b
->expr1
->rank
!= 0))
10187 gfc_error ("IF clause at %L requires a scalar LOGICAL expression",
10193 && b
->expr1
!= NULL
10194 && (b
->expr1
->ts
.type
!= BT_LOGICAL
|| b
->expr1
->rank
== 0))
10195 gfc_error ("WHERE/ELSEWHERE clause at %L requires a LOGICAL array",
10200 resolve_branch (b
->label1
, b
);
10204 resolve_block_construct (b
);
10208 case EXEC_SELECT_TYPE
:
10211 case EXEC_DO_WHILE
:
10212 case EXEC_DO_CONCURRENT
:
10213 case EXEC_CRITICAL
:
10216 case EXEC_IOLENGTH
:
10220 case EXEC_OMP_ATOMIC
:
10221 case EXEC_OACC_ATOMIC
:
10223 gfc_omp_atomic_op aop
10224 = (gfc_omp_atomic_op
) (b
->ext
.omp_atomic
& GFC_OMP_ATOMIC_MASK
);
10226 /* Verify this before calling gfc_resolve_code, which might
10228 gcc_assert (b
->next
&& b
->next
->op
== EXEC_ASSIGN
);
10229 gcc_assert (((aop
!= GFC_OMP_ATOMIC_CAPTURE
)
10230 && b
->next
->next
== NULL
)
10231 || ((aop
== GFC_OMP_ATOMIC_CAPTURE
)
10232 && b
->next
->next
!= NULL
10233 && b
->next
->next
->op
== EXEC_ASSIGN
10234 && b
->next
->next
->next
== NULL
));
10238 case EXEC_OACC_PARALLEL_LOOP
:
10239 case EXEC_OACC_PARALLEL
:
10240 case EXEC_OACC_KERNELS_LOOP
:
10241 case EXEC_OACC_KERNELS
:
10242 case EXEC_OACC_DATA
:
10243 case EXEC_OACC_HOST_DATA
:
10244 case EXEC_OACC_LOOP
:
10245 case EXEC_OACC_UPDATE
:
10246 case EXEC_OACC_WAIT
:
10247 case EXEC_OACC_CACHE
:
10248 case EXEC_OACC_ENTER_DATA
:
10249 case EXEC_OACC_EXIT_DATA
:
10250 case EXEC_OACC_ROUTINE
:
10251 case EXEC_OMP_CRITICAL
:
10252 case EXEC_OMP_DISTRIBUTE
:
10253 case EXEC_OMP_DISTRIBUTE_PARALLEL_DO
:
10254 case EXEC_OMP_DISTRIBUTE_PARALLEL_DO_SIMD
:
10255 case EXEC_OMP_DISTRIBUTE_SIMD
:
10257 case EXEC_OMP_DO_SIMD
:
10258 case EXEC_OMP_MASTER
:
10259 case EXEC_OMP_ORDERED
:
10260 case EXEC_OMP_PARALLEL
:
10261 case EXEC_OMP_PARALLEL_DO
:
10262 case EXEC_OMP_PARALLEL_DO_SIMD
:
10263 case EXEC_OMP_PARALLEL_SECTIONS
:
10264 case EXEC_OMP_PARALLEL_WORKSHARE
:
10265 case EXEC_OMP_SECTIONS
:
10266 case EXEC_OMP_SIMD
:
10267 case EXEC_OMP_SINGLE
:
10268 case EXEC_OMP_TARGET
:
10269 case EXEC_OMP_TARGET_DATA
:
10270 case EXEC_OMP_TARGET_ENTER_DATA
:
10271 case EXEC_OMP_TARGET_EXIT_DATA
:
10272 case EXEC_OMP_TARGET_PARALLEL
:
10273 case EXEC_OMP_TARGET_PARALLEL_DO
:
10274 case EXEC_OMP_TARGET_PARALLEL_DO_SIMD
:
10275 case EXEC_OMP_TARGET_SIMD
:
10276 case EXEC_OMP_TARGET_TEAMS
:
10277 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE
:
10278 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO
:
10279 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
10280 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_SIMD
:
10281 case EXEC_OMP_TARGET_UPDATE
:
10282 case EXEC_OMP_TASK
:
10283 case EXEC_OMP_TASKGROUP
:
10284 case EXEC_OMP_TASKLOOP
:
10285 case EXEC_OMP_TASKLOOP_SIMD
:
10286 case EXEC_OMP_TASKWAIT
:
10287 case EXEC_OMP_TASKYIELD
:
10288 case EXEC_OMP_TEAMS
:
10289 case EXEC_OMP_TEAMS_DISTRIBUTE
:
10290 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO
:
10291 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
10292 case EXEC_OMP_TEAMS_DISTRIBUTE_SIMD
:
10293 case EXEC_OMP_WORKSHARE
:
10297 gfc_internal_error ("gfc_resolve_blocks(): Bad block type");
10300 gfc_resolve_code (b
->next
, ns
);
10305 /* Does everything to resolve an ordinary assignment. Returns true
10306 if this is an interface assignment. */
10308 resolve_ordinary_assign (gfc_code
*code
, gfc_namespace
*ns
)
10315 symbol_attribute attr
;
10317 if (gfc_extend_assign (code
, ns
))
10321 if (code
->op
== EXEC_ASSIGN_CALL
)
10323 lhs
= code
->ext
.actual
->expr
;
10324 rhsptr
= &code
->ext
.actual
->next
->expr
;
10328 gfc_actual_arglist
* args
;
10329 gfc_typebound_proc
* tbp
;
10331 gcc_assert (code
->op
== EXEC_COMPCALL
);
10333 args
= code
->expr1
->value
.compcall
.actual
;
10335 rhsptr
= &args
->next
->expr
;
10337 tbp
= code
->expr1
->value
.compcall
.tbp
;
10338 gcc_assert (!tbp
->is_generic
);
10341 /* Make a temporary rhs when there is a default initializer
10342 and rhs is the same symbol as the lhs. */
10343 if ((*rhsptr
)->expr_type
== EXPR_VARIABLE
10344 && (*rhsptr
)->symtree
->n
.sym
->ts
.type
== BT_DERIVED
10345 && gfc_has_default_initializer ((*rhsptr
)->symtree
->n
.sym
->ts
.u
.derived
)
10346 && (lhs
->symtree
->n
.sym
== (*rhsptr
)->symtree
->n
.sym
))
10347 *rhsptr
= gfc_get_parentheses (*rhsptr
);
10356 && !gfc_notify_std (GFC_STD_GNU
, "BOZ literal at %L outside "
10357 "a DATA statement and outside INT/REAL/DBLE/CMPLX",
10361 /* Handle the case of a BOZ literal on the RHS. */
10362 if (rhs
->is_boz
&& lhs
->ts
.type
!= BT_INTEGER
)
10365 if (warn_surprising
)
10366 gfc_warning (OPT_Wsurprising
,
10367 "BOZ literal at %L is bitwise transferred "
10368 "non-integer symbol %qs", &code
->loc
,
10369 lhs
->symtree
->n
.sym
->name
);
10371 if (!gfc_convert_boz (rhs
, &lhs
->ts
))
10373 if ((rc
= gfc_range_check (rhs
)) != ARITH_OK
)
10375 if (rc
== ARITH_UNDERFLOW
)
10376 gfc_error ("Arithmetic underflow of bit-wise transferred BOZ at %L"
10377 ". This check can be disabled with the option "
10378 "%<-fno-range-check%>", &rhs
->where
);
10379 else if (rc
== ARITH_OVERFLOW
)
10380 gfc_error ("Arithmetic overflow of bit-wise transferred BOZ at %L"
10381 ". This check can be disabled with the option "
10382 "%<-fno-range-check%>", &rhs
->where
);
10383 else if (rc
== ARITH_NAN
)
10384 gfc_error ("Arithmetic NaN of bit-wise transferred BOZ at %L"
10385 ". This check can be disabled with the option "
10386 "%<-fno-range-check%>", &rhs
->where
);
10391 if (lhs
->ts
.type
== BT_CHARACTER
10392 && warn_character_truncation
)
10394 HOST_WIDE_INT llen
= 0, rlen
= 0;
10395 if (lhs
->ts
.u
.cl
!= NULL
10396 && lhs
->ts
.u
.cl
->length
!= NULL
10397 && lhs
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
)
10398 llen
= gfc_mpz_get_hwi (lhs
->ts
.u
.cl
->length
->value
.integer
);
10400 if (rhs
->expr_type
== EXPR_CONSTANT
)
10401 rlen
= rhs
->value
.character
.length
;
10403 else if (rhs
->ts
.u
.cl
!= NULL
10404 && rhs
->ts
.u
.cl
->length
!= NULL
10405 && rhs
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
)
10406 rlen
= gfc_mpz_get_hwi (rhs
->ts
.u
.cl
->length
->value
.integer
);
10408 if (rlen
&& llen
&& rlen
> llen
)
10409 gfc_warning_now (OPT_Wcharacter_truncation
,
10410 "CHARACTER expression will be truncated "
10411 "in assignment (%ld/%ld) at %L",
10412 (long) llen
, (long) rlen
, &code
->loc
);
10415 /* Ensure that a vector index expression for the lvalue is evaluated
10416 to a temporary if the lvalue symbol is referenced in it. */
10419 for (ref
= lhs
->ref
; ref
; ref
= ref
->next
)
10420 if (ref
->type
== REF_ARRAY
)
10422 for (n
= 0; n
< ref
->u
.ar
.dimen
; n
++)
10423 if (ref
->u
.ar
.dimen_type
[n
] == DIMEN_VECTOR
10424 && gfc_find_sym_in_expr (lhs
->symtree
->n
.sym
,
10425 ref
->u
.ar
.start
[n
]))
10427 = gfc_get_parentheses (ref
->u
.ar
.start
[n
]);
10431 if (gfc_pure (NULL
))
10433 if (lhs
->ts
.type
== BT_DERIVED
10434 && lhs
->expr_type
== EXPR_VARIABLE
10435 && lhs
->ts
.u
.derived
->attr
.pointer_comp
10436 && rhs
->expr_type
== EXPR_VARIABLE
10437 && (gfc_impure_variable (rhs
->symtree
->n
.sym
)
10438 || gfc_is_coindexed (rhs
)))
10440 /* F2008, C1283. */
10441 if (gfc_is_coindexed (rhs
))
10442 gfc_error ("Coindexed expression at %L is assigned to "
10443 "a derived type variable with a POINTER "
10444 "component in a PURE procedure",
10447 gfc_error ("The impure variable at %L is assigned to "
10448 "a derived type variable with a POINTER "
10449 "component in a PURE procedure (12.6)",
10454 /* Fortran 2008, C1283. */
10455 if (gfc_is_coindexed (lhs
))
10457 gfc_error ("Assignment to coindexed variable at %L in a PURE "
10458 "procedure", &rhs
->where
);
10463 if (gfc_implicit_pure (NULL
))
10465 if (lhs
->expr_type
== EXPR_VARIABLE
10466 && lhs
->symtree
->n
.sym
!= gfc_current_ns
->proc_name
10467 && lhs
->symtree
->n
.sym
->ns
!= gfc_current_ns
)
10468 gfc_unset_implicit_pure (NULL
);
10470 if (lhs
->ts
.type
== BT_DERIVED
10471 && lhs
->expr_type
== EXPR_VARIABLE
10472 && lhs
->ts
.u
.derived
->attr
.pointer_comp
10473 && rhs
->expr_type
== EXPR_VARIABLE
10474 && (gfc_impure_variable (rhs
->symtree
->n
.sym
)
10475 || gfc_is_coindexed (rhs
)))
10476 gfc_unset_implicit_pure (NULL
);
10478 /* Fortran 2008, C1283. */
10479 if (gfc_is_coindexed (lhs
))
10480 gfc_unset_implicit_pure (NULL
);
10483 /* F2008, 7.2.1.2. */
10484 attr
= gfc_expr_attr (lhs
);
10485 if (lhs
->ts
.type
== BT_CLASS
&& attr
.allocatable
)
10487 if (attr
.codimension
)
10489 gfc_error ("Assignment to polymorphic coarray at %L is not "
10490 "permitted", &lhs
->where
);
10493 if (!gfc_notify_std (GFC_STD_F2008
, "Assignment to an allocatable "
10494 "polymorphic variable at %L", &lhs
->where
))
10496 if (!flag_realloc_lhs
)
10498 gfc_error ("Assignment to an allocatable polymorphic variable at %L "
10499 "requires %<-frealloc-lhs%>", &lhs
->where
);
10503 else if (lhs
->ts
.type
== BT_CLASS
)
10505 gfc_error ("Nonallocatable variable must not be polymorphic in intrinsic "
10506 "assignment at %L - check that there is a matching specific "
10507 "subroutine for '=' operator", &lhs
->where
);
10511 bool lhs_coindexed
= gfc_is_coindexed (lhs
);
10513 /* F2008, Section 7.2.1.2. */
10514 if (lhs_coindexed
&& gfc_has_ultimate_allocatable (lhs
))
10516 gfc_error ("Coindexed variable must not have an allocatable ultimate "
10517 "component in assignment at %L", &lhs
->where
);
10521 /* Assign the 'data' of a class object to a derived type. */
10522 if (lhs
->ts
.type
== BT_DERIVED
10523 && rhs
->ts
.type
== BT_CLASS
10524 && rhs
->expr_type
!= EXPR_ARRAY
)
10525 gfc_add_data_component (rhs
);
10527 /* Make sure there is a vtable and, in particular, a _copy for the
10529 if (UNLIMITED_POLY (lhs
) && lhs
->rank
&& rhs
->ts
.type
!= BT_CLASS
)
10530 gfc_find_vtab (&rhs
->ts
);
10532 bool caf_convert_to_send
= flag_coarray
== GFC_FCOARRAY_LIB
10534 || (code
->expr2
->expr_type
== EXPR_FUNCTION
10535 && code
->expr2
->value
.function
.isym
10536 && code
->expr2
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
10537 && (code
->expr1
->rank
== 0 || code
->expr2
->rank
!= 0)
10538 && !gfc_expr_attr (rhs
).allocatable
10539 && !gfc_has_vector_subscript (rhs
)));
10541 gfc_check_assign (lhs
, rhs
, 1, !caf_convert_to_send
);
10543 /* Insert a GFC_ISYM_CAF_SEND intrinsic, when the LHS is a coindexed variable.
10544 Additionally, insert this code when the RHS is a CAF as we then use the
10545 GFC_ISYM_CAF_SEND intrinsic just to avoid a temporary; but do not do so if
10546 the LHS is (re)allocatable or has a vector subscript. If the LHS is a
10547 noncoindexed array and the RHS is a coindexed scalar, use the normal code
10549 if (caf_convert_to_send
)
10551 if (code
->expr2
->expr_type
== EXPR_FUNCTION
10552 && code
->expr2
->value
.function
.isym
10553 && code
->expr2
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
)
10554 remove_caf_get_intrinsic (code
->expr2
);
10555 code
->op
= EXEC_CALL
;
10556 gfc_get_sym_tree (GFC_PREFIX ("caf_send"), ns
, &code
->symtree
, true);
10557 code
->resolved_sym
= code
->symtree
->n
.sym
;
10558 code
->resolved_sym
->attr
.flavor
= FL_PROCEDURE
;
10559 code
->resolved_sym
->attr
.intrinsic
= 1;
10560 code
->resolved_sym
->attr
.subroutine
= 1;
10561 code
->resolved_isym
= gfc_intrinsic_subroutine_by_id (GFC_ISYM_CAF_SEND
);
10562 gfc_commit_symbol (code
->resolved_sym
);
10563 code
->ext
.actual
= gfc_get_actual_arglist ();
10564 code
->ext
.actual
->expr
= lhs
;
10565 code
->ext
.actual
->next
= gfc_get_actual_arglist ();
10566 code
->ext
.actual
->next
->expr
= rhs
;
10567 code
->expr1
= NULL
;
10568 code
->expr2
= NULL
;
10575 /* Add a component reference onto an expression. */
10578 add_comp_ref (gfc_expr
*e
, gfc_component
*c
)
10583 ref
= &((*ref
)->next
);
10584 *ref
= gfc_get_ref ();
10585 (*ref
)->type
= REF_COMPONENT
;
10586 (*ref
)->u
.c
.sym
= e
->ts
.u
.derived
;
10587 (*ref
)->u
.c
.component
= c
;
10590 /* Add a full array ref, as necessary. */
10593 gfc_add_full_array_ref (e
, c
->as
);
10594 e
->rank
= c
->as
->rank
;
10599 /* Build an assignment. Keep the argument 'op' for future use, so that
10600 pointer assignments can be made. */
10603 build_assignment (gfc_exec_op op
, gfc_expr
*expr1
, gfc_expr
*expr2
,
10604 gfc_component
*comp1
, gfc_component
*comp2
, locus loc
)
10606 gfc_code
*this_code
;
10608 this_code
= gfc_get_code (op
);
10609 this_code
->next
= NULL
;
10610 this_code
->expr1
= gfc_copy_expr (expr1
);
10611 this_code
->expr2
= gfc_copy_expr (expr2
);
10612 this_code
->loc
= loc
;
10613 if (comp1
&& comp2
)
10615 add_comp_ref (this_code
->expr1
, comp1
);
10616 add_comp_ref (this_code
->expr2
, comp2
);
10623 /* Makes a temporary variable expression based on the characteristics of
10624 a given variable expression. */
10627 get_temp_from_expr (gfc_expr
*e
, gfc_namespace
*ns
)
10629 static int serial
= 0;
10630 char name
[GFC_MAX_SYMBOL_LEN
];
10632 gfc_array_spec
*as
;
10633 gfc_array_ref
*aref
;
10636 sprintf (name
, GFC_PREFIX("DA%d"), serial
++);
10637 gfc_get_sym_tree (name
, ns
, &tmp
, false);
10638 gfc_add_type (tmp
->n
.sym
, &e
->ts
, NULL
);
10640 if (e
->expr_type
== EXPR_CONSTANT
&& e
->ts
.type
== BT_CHARACTER
)
10641 tmp
->n
.sym
->ts
.u
.cl
->length
= gfc_get_int_expr (gfc_charlen_int_kind
,
10643 e
->value
.character
.length
);
10649 /* Obtain the arrayspec for the temporary. */
10650 if (e
->rank
&& e
->expr_type
!= EXPR_ARRAY
10651 && e
->expr_type
!= EXPR_FUNCTION
10652 && e
->expr_type
!= EXPR_OP
)
10654 aref
= gfc_find_array_ref (e
);
10655 if (e
->expr_type
== EXPR_VARIABLE
10656 && e
->symtree
->n
.sym
->as
== aref
->as
)
10660 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
10661 if (ref
->type
== REF_COMPONENT
10662 && ref
->u
.c
.component
->as
== aref
->as
)
10670 /* Add the attributes and the arrayspec to the temporary. */
10671 tmp
->n
.sym
->attr
= gfc_expr_attr (e
);
10672 tmp
->n
.sym
->attr
.function
= 0;
10673 tmp
->n
.sym
->attr
.result
= 0;
10674 tmp
->n
.sym
->attr
.flavor
= FL_VARIABLE
;
10675 tmp
->n
.sym
->attr
.dummy
= 0;
10676 tmp
->n
.sym
->attr
.intent
= INTENT_UNKNOWN
;
10680 tmp
->n
.sym
->as
= gfc_copy_array_spec (as
);
10683 if (as
->type
== AS_DEFERRED
)
10684 tmp
->n
.sym
->attr
.allocatable
= 1;
10686 else if (e
->rank
&& (e
->expr_type
== EXPR_ARRAY
10687 || e
->expr_type
== EXPR_FUNCTION
10688 || e
->expr_type
== EXPR_OP
))
10690 tmp
->n
.sym
->as
= gfc_get_array_spec ();
10691 tmp
->n
.sym
->as
->type
= AS_DEFERRED
;
10692 tmp
->n
.sym
->as
->rank
= e
->rank
;
10693 tmp
->n
.sym
->attr
.allocatable
= 1;
10694 tmp
->n
.sym
->attr
.dimension
= 1;
10697 tmp
->n
.sym
->attr
.dimension
= 0;
10699 gfc_set_sym_referenced (tmp
->n
.sym
);
10700 gfc_commit_symbol (tmp
->n
.sym
);
10701 e
= gfc_lval_expr_from_sym (tmp
->n
.sym
);
10703 /* Should the lhs be a section, use its array ref for the
10704 temporary expression. */
10705 if (aref
&& aref
->type
!= AR_FULL
)
10707 gfc_free_ref_list (e
->ref
);
10708 e
->ref
= gfc_copy_ref (ref
);
10714 /* Add one line of code to the code chain, making sure that 'head' and
10715 'tail' are appropriately updated. */
10718 add_code_to_chain (gfc_code
**this_code
, gfc_code
**head
, gfc_code
**tail
)
10720 gcc_assert (this_code
);
10722 *head
= *tail
= *this_code
;
10724 *tail
= gfc_append_code (*tail
, *this_code
);
10729 /* Counts the potential number of part array references that would
10730 result from resolution of typebound defined assignments. */
10733 nonscalar_typebound_assign (gfc_symbol
*derived
, int depth
)
10736 int c_depth
= 0, t_depth
;
10738 for (c
= derived
->components
; c
; c
= c
->next
)
10740 if ((!gfc_bt_struct (c
->ts
.type
)
10742 || c
->attr
.allocatable
10743 || c
->attr
.proc_pointer_comp
10744 || c
->attr
.class_pointer
10745 || c
->attr
.proc_pointer
)
10746 && !c
->attr
.defined_assign_comp
)
10749 if (c
->as
&& c_depth
== 0)
10752 if (c
->ts
.u
.derived
->attr
.defined_assign_comp
)
10753 t_depth
= nonscalar_typebound_assign (c
->ts
.u
.derived
,
10758 c_depth
= t_depth
> c_depth
? t_depth
: c_depth
;
10760 return depth
+ c_depth
;
10764 /* Implement 7.2.1.3 of the F08 standard:
10765 "An intrinsic assignment where the variable is of derived type is
10766 performed as if each component of the variable were assigned from the
10767 corresponding component of expr using pointer assignment (7.2.2) for
10768 each pointer component, defined assignment for each nonpointer
10769 nonallocatable component of a type that has a type-bound defined
10770 assignment consistent with the component, intrinsic assignment for
10771 each other nonpointer nonallocatable component, ..."
10773 The pointer assignments are taken care of by the intrinsic
10774 assignment of the structure itself. This function recursively adds
10775 defined assignments where required. The recursion is accomplished
10776 by calling gfc_resolve_code.
10778 When the lhs in a defined assignment has intent INOUT, we need a
10779 temporary for the lhs. In pseudo-code:
10781 ! Only call function lhs once.
10782 if (lhs is not a constant or an variable)
10785 ! Do the intrinsic assignment
10787 ! Now do the defined assignments
10788 do over components with typebound defined assignment [%cmp]
10789 #if one component's assignment procedure is INOUT
10791 #if expr2 non-variable
10797 t1%cmp {defined=} expr2%cmp
10803 expr1%cmp {defined=} expr2%cmp
10807 /* The temporary assignments have to be put on top of the additional
10808 code to avoid the result being changed by the intrinsic assignment.
10810 static int component_assignment_level
= 0;
10811 static gfc_code
*tmp_head
= NULL
, *tmp_tail
= NULL
;
10814 generate_component_assignments (gfc_code
**code
, gfc_namespace
*ns
)
10816 gfc_component
*comp1
, *comp2
;
10817 gfc_code
*this_code
= NULL
, *head
= NULL
, *tail
= NULL
;
10819 int error_count
, depth
;
10821 gfc_get_errors (NULL
, &error_count
);
10823 /* Filter out continuing processing after an error. */
10825 || (*code
)->expr1
->ts
.type
!= BT_DERIVED
10826 || (*code
)->expr2
->ts
.type
!= BT_DERIVED
)
10829 /* TODO: Handle more than one part array reference in assignments. */
10830 depth
= nonscalar_typebound_assign ((*code
)->expr1
->ts
.u
.derived
,
10831 (*code
)->expr1
->rank
? 1 : 0);
10834 gfc_warning (0, "TODO: type-bound defined assignment(s) at %L not "
10835 "done because multiple part array references would "
10836 "occur in intermediate expressions.", &(*code
)->loc
);
10840 component_assignment_level
++;
10842 /* Create a temporary so that functions get called only once. */
10843 if ((*code
)->expr2
->expr_type
!= EXPR_VARIABLE
10844 && (*code
)->expr2
->expr_type
!= EXPR_CONSTANT
)
10846 gfc_expr
*tmp_expr
;
10848 /* Assign the rhs to the temporary. */
10849 tmp_expr
= get_temp_from_expr ((*code
)->expr1
, ns
);
10850 this_code
= build_assignment (EXEC_ASSIGN
,
10851 tmp_expr
, (*code
)->expr2
,
10852 NULL
, NULL
, (*code
)->loc
);
10853 /* Add the code and substitute the rhs expression. */
10854 add_code_to_chain (&this_code
, &tmp_head
, &tmp_tail
);
10855 gfc_free_expr ((*code
)->expr2
);
10856 (*code
)->expr2
= tmp_expr
;
10859 /* Do the intrinsic assignment. This is not needed if the lhs is one
10860 of the temporaries generated here, since the intrinsic assignment
10861 to the final result already does this. */
10862 if ((*code
)->expr1
->symtree
->n
.sym
->name
[2] != '@')
10864 this_code
= build_assignment (EXEC_ASSIGN
,
10865 (*code
)->expr1
, (*code
)->expr2
,
10866 NULL
, NULL
, (*code
)->loc
);
10867 add_code_to_chain (&this_code
, &head
, &tail
);
10870 comp1
= (*code
)->expr1
->ts
.u
.derived
->components
;
10871 comp2
= (*code
)->expr2
->ts
.u
.derived
->components
;
10874 for (; comp1
; comp1
= comp1
->next
, comp2
= comp2
->next
)
10876 bool inout
= false;
10878 /* The intrinsic assignment does the right thing for pointers
10879 of all kinds and allocatable components. */
10880 if (!gfc_bt_struct (comp1
->ts
.type
)
10881 || comp1
->attr
.pointer
10882 || comp1
->attr
.allocatable
10883 || comp1
->attr
.proc_pointer_comp
10884 || comp1
->attr
.class_pointer
10885 || comp1
->attr
.proc_pointer
)
10888 /* Make an assigment for this component. */
10889 this_code
= build_assignment (EXEC_ASSIGN
,
10890 (*code
)->expr1
, (*code
)->expr2
,
10891 comp1
, comp2
, (*code
)->loc
);
10893 /* Convert the assignment if there is a defined assignment for
10894 this type. Otherwise, using the call from gfc_resolve_code,
10895 recurse into its components. */
10896 gfc_resolve_code (this_code
, ns
);
10898 if (this_code
->op
== EXEC_ASSIGN_CALL
)
10900 gfc_formal_arglist
*dummy_args
;
10902 /* Check that there is a typebound defined assignment. If not,
10903 then this must be a module defined assignment. We cannot
10904 use the defined_assign_comp attribute here because it must
10905 be this derived type that has the defined assignment and not
10907 if (!(comp1
->ts
.u
.derived
->f2k_derived
10908 && comp1
->ts
.u
.derived
->f2k_derived
10909 ->tb_op
[INTRINSIC_ASSIGN
]))
10911 gfc_free_statements (this_code
);
10916 /* If the first argument of the subroutine has intent INOUT
10917 a temporary must be generated and used instead. */
10918 rsym
= this_code
->resolved_sym
;
10919 dummy_args
= gfc_sym_get_dummy_args (rsym
);
10921 && dummy_args
->sym
->attr
.intent
== INTENT_INOUT
)
10923 gfc_code
*temp_code
;
10926 /* Build the temporary required for the assignment and put
10927 it at the head of the generated code. */
10930 t1
= get_temp_from_expr ((*code
)->expr1
, ns
);
10931 temp_code
= build_assignment (EXEC_ASSIGN
,
10932 t1
, (*code
)->expr1
,
10933 NULL
, NULL
, (*code
)->loc
);
10935 /* For allocatable LHS, check whether it is allocated. Note
10936 that allocatable components with defined assignment are
10937 not yet support. See PR 57696. */
10938 if ((*code
)->expr1
->symtree
->n
.sym
->attr
.allocatable
)
10942 gfc_lval_expr_from_sym ((*code
)->expr1
->symtree
->n
.sym
);
10943 block
= gfc_get_code (EXEC_IF
);
10944 block
->block
= gfc_get_code (EXEC_IF
);
10945 block
->block
->expr1
10946 = gfc_build_intrinsic_call (ns
,
10947 GFC_ISYM_ALLOCATED
, "allocated",
10948 (*code
)->loc
, 1, e
);
10949 block
->block
->next
= temp_code
;
10952 add_code_to_chain (&temp_code
, &tmp_head
, &tmp_tail
);
10955 /* Replace the first actual arg with the component of the
10957 gfc_free_expr (this_code
->ext
.actual
->expr
);
10958 this_code
->ext
.actual
->expr
= gfc_copy_expr (t1
);
10959 add_comp_ref (this_code
->ext
.actual
->expr
, comp1
);
10961 /* If the LHS variable is allocatable and wasn't allocated and
10962 the temporary is allocatable, pointer assign the address of
10963 the freshly allocated LHS to the temporary. */
10964 if ((*code
)->expr1
->symtree
->n
.sym
->attr
.allocatable
10965 && gfc_expr_attr ((*code
)->expr1
).allocatable
)
10970 cond
= gfc_get_expr ();
10971 cond
->ts
.type
= BT_LOGICAL
;
10972 cond
->ts
.kind
= gfc_default_logical_kind
;
10973 cond
->expr_type
= EXPR_OP
;
10974 cond
->where
= (*code
)->loc
;
10975 cond
->value
.op
.op
= INTRINSIC_NOT
;
10976 cond
->value
.op
.op1
= gfc_build_intrinsic_call (ns
,
10977 GFC_ISYM_ALLOCATED
, "allocated",
10978 (*code
)->loc
, 1, gfc_copy_expr (t1
));
10979 block
= gfc_get_code (EXEC_IF
);
10980 block
->block
= gfc_get_code (EXEC_IF
);
10981 block
->block
->expr1
= cond
;
10982 block
->block
->next
= build_assignment (EXEC_POINTER_ASSIGN
,
10983 t1
, (*code
)->expr1
,
10984 NULL
, NULL
, (*code
)->loc
);
10985 add_code_to_chain (&block
, &head
, &tail
);
10989 else if (this_code
->op
== EXEC_ASSIGN
&& !this_code
->next
)
10991 /* Don't add intrinsic assignments since they are already
10992 effected by the intrinsic assignment of the structure. */
10993 gfc_free_statements (this_code
);
10998 add_code_to_chain (&this_code
, &head
, &tail
);
11002 /* Transfer the value to the final result. */
11003 this_code
= build_assignment (EXEC_ASSIGN
,
11004 (*code
)->expr1
, t1
,
11005 comp1
, comp2
, (*code
)->loc
);
11006 add_code_to_chain (&this_code
, &head
, &tail
);
11010 /* Put the temporary assignments at the top of the generated code. */
11011 if (tmp_head
&& component_assignment_level
== 1)
11013 gfc_append_code (tmp_head
, head
);
11015 tmp_head
= tmp_tail
= NULL
;
11018 // If we did a pointer assignment - thus, we need to ensure that the LHS is
11019 // not accidentally deallocated. Hence, nullify t1.
11020 if (t1
&& (*code
)->expr1
->symtree
->n
.sym
->attr
.allocatable
11021 && gfc_expr_attr ((*code
)->expr1
).allocatable
)
11027 e
= gfc_lval_expr_from_sym ((*code
)->expr1
->symtree
->n
.sym
);
11028 cond
= gfc_build_intrinsic_call (ns
, GFC_ISYM_ASSOCIATED
, "associated",
11029 (*code
)->loc
, 2, gfc_copy_expr (t1
), e
);
11030 block
= gfc_get_code (EXEC_IF
);
11031 block
->block
= gfc_get_code (EXEC_IF
);
11032 block
->block
->expr1
= cond
;
11033 block
->block
->next
= build_assignment (EXEC_POINTER_ASSIGN
,
11034 t1
, gfc_get_null_expr (&(*code
)->loc
),
11035 NULL
, NULL
, (*code
)->loc
);
11036 gfc_append_code (tail
, block
);
11040 /* Now attach the remaining code chain to the input code. Step on
11041 to the end of the new code since resolution is complete. */
11042 gcc_assert ((*code
)->op
== EXEC_ASSIGN
);
11043 tail
->next
= (*code
)->next
;
11044 /* Overwrite 'code' because this would place the intrinsic assignment
11045 before the temporary for the lhs is created. */
11046 gfc_free_expr ((*code
)->expr1
);
11047 gfc_free_expr ((*code
)->expr2
);
11053 component_assignment_level
--;
11057 /* F2008: Pointer function assignments are of the form:
11058 ptr_fcn (args) = expr
11059 This function breaks these assignments into two statements:
11060 temporary_pointer => ptr_fcn(args)
11061 temporary_pointer = expr */
11064 resolve_ptr_fcn_assign (gfc_code
**code
, gfc_namespace
*ns
)
11066 gfc_expr
*tmp_ptr_expr
;
11067 gfc_code
*this_code
;
11068 gfc_component
*comp
;
11071 if ((*code
)->expr1
->expr_type
!= EXPR_FUNCTION
)
11074 /* Even if standard does not support this feature, continue to build
11075 the two statements to avoid upsetting frontend_passes.c. */
11076 gfc_notify_std (GFC_STD_F2008
, "Pointer procedure assignment at "
11077 "%L", &(*code
)->loc
);
11079 comp
= gfc_get_proc_ptr_comp ((*code
)->expr1
);
11082 s
= comp
->ts
.interface
;
11084 s
= (*code
)->expr1
->symtree
->n
.sym
;
11086 if (s
== NULL
|| !s
->result
->attr
.pointer
)
11088 gfc_error ("The function result on the lhs of the assignment at "
11089 "%L must have the pointer attribute.",
11090 &(*code
)->expr1
->where
);
11091 (*code
)->op
= EXEC_NOP
;
11095 tmp_ptr_expr
= get_temp_from_expr ((*code
)->expr2
, ns
);
11097 /* get_temp_from_expression is set up for ordinary assignments. To that
11098 end, where array bounds are not known, arrays are made allocatable.
11099 Change the temporary to a pointer here. */
11100 tmp_ptr_expr
->symtree
->n
.sym
->attr
.pointer
= 1;
11101 tmp_ptr_expr
->symtree
->n
.sym
->attr
.allocatable
= 0;
11102 tmp_ptr_expr
->where
= (*code
)->loc
;
11104 this_code
= build_assignment (EXEC_ASSIGN
,
11105 tmp_ptr_expr
, (*code
)->expr2
,
11106 NULL
, NULL
, (*code
)->loc
);
11107 this_code
->next
= (*code
)->next
;
11108 (*code
)->next
= this_code
;
11109 (*code
)->op
= EXEC_POINTER_ASSIGN
;
11110 (*code
)->expr2
= (*code
)->expr1
;
11111 (*code
)->expr1
= tmp_ptr_expr
;
11117 /* Deferred character length assignments from an operator expression
11118 require a temporary because the character length of the lhs can
11119 change in the course of the assignment. */
11122 deferred_op_assign (gfc_code
**code
, gfc_namespace
*ns
)
11124 gfc_expr
*tmp_expr
;
11125 gfc_code
*this_code
;
11127 if (!((*code
)->expr1
->ts
.type
== BT_CHARACTER
11128 && (*code
)->expr1
->ts
.deferred
&& (*code
)->expr1
->rank
11129 && (*code
)->expr2
->expr_type
== EXPR_OP
))
11132 if (!gfc_check_dependency ((*code
)->expr1
, (*code
)->expr2
, 1))
11135 tmp_expr
= get_temp_from_expr ((*code
)->expr1
, ns
);
11136 tmp_expr
->where
= (*code
)->loc
;
11138 /* A new charlen is required to ensure that the variable string
11139 length is different to that of the original lhs. */
11140 tmp_expr
->ts
.u
.cl
= gfc_get_charlen();
11141 tmp_expr
->symtree
->n
.sym
->ts
.u
.cl
= tmp_expr
->ts
.u
.cl
;
11142 tmp_expr
->ts
.u
.cl
->next
= (*code
)->expr2
->ts
.u
.cl
->next
;
11143 (*code
)->expr2
->ts
.u
.cl
->next
= tmp_expr
->ts
.u
.cl
;
11145 tmp_expr
->symtree
->n
.sym
->ts
.deferred
= 1;
11147 this_code
= build_assignment (EXEC_ASSIGN
,
11149 gfc_copy_expr (tmp_expr
),
11150 NULL
, NULL
, (*code
)->loc
);
11152 (*code
)->expr1
= tmp_expr
;
11154 this_code
->next
= (*code
)->next
;
11155 (*code
)->next
= this_code
;
11161 /* Given a block of code, recursively resolve everything pointed to by this
11165 gfc_resolve_code (gfc_code
*code
, gfc_namespace
*ns
)
11167 int omp_workshare_save
;
11168 int forall_save
, do_concurrent_save
;
11172 frame
.prev
= cs_base
;
11176 find_reachable_labels (code
);
11178 for (; code
; code
= code
->next
)
11180 frame
.current
= code
;
11181 forall_save
= forall_flag
;
11182 do_concurrent_save
= gfc_do_concurrent_flag
;
11184 if (code
->op
== EXEC_FORALL
)
11187 gfc_resolve_forall (code
, ns
, forall_save
);
11190 else if (code
->block
)
11192 omp_workshare_save
= -1;
11195 case EXEC_OACC_PARALLEL_LOOP
:
11196 case EXEC_OACC_PARALLEL
:
11197 case EXEC_OACC_KERNELS_LOOP
:
11198 case EXEC_OACC_KERNELS
:
11199 case EXEC_OACC_DATA
:
11200 case EXEC_OACC_HOST_DATA
:
11201 case EXEC_OACC_LOOP
:
11202 gfc_resolve_oacc_blocks (code
, ns
);
11204 case EXEC_OMP_PARALLEL_WORKSHARE
:
11205 omp_workshare_save
= omp_workshare_flag
;
11206 omp_workshare_flag
= 1;
11207 gfc_resolve_omp_parallel_blocks (code
, ns
);
11209 case EXEC_OMP_PARALLEL
:
11210 case EXEC_OMP_PARALLEL_DO
:
11211 case EXEC_OMP_PARALLEL_DO_SIMD
:
11212 case EXEC_OMP_PARALLEL_SECTIONS
:
11213 case EXEC_OMP_TARGET_PARALLEL
:
11214 case EXEC_OMP_TARGET_PARALLEL_DO
:
11215 case EXEC_OMP_TARGET_PARALLEL_DO_SIMD
:
11216 case EXEC_OMP_TARGET_TEAMS
:
11217 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE
:
11218 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO
:
11219 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
11220 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_SIMD
:
11221 case EXEC_OMP_TASK
:
11222 case EXEC_OMP_TASKLOOP
:
11223 case EXEC_OMP_TASKLOOP_SIMD
:
11224 case EXEC_OMP_TEAMS
:
11225 case EXEC_OMP_TEAMS_DISTRIBUTE
:
11226 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO
:
11227 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
11228 case EXEC_OMP_TEAMS_DISTRIBUTE_SIMD
:
11229 omp_workshare_save
= omp_workshare_flag
;
11230 omp_workshare_flag
= 0;
11231 gfc_resolve_omp_parallel_blocks (code
, ns
);
11233 case EXEC_OMP_DISTRIBUTE
:
11234 case EXEC_OMP_DISTRIBUTE_SIMD
:
11236 case EXEC_OMP_DO_SIMD
:
11237 case EXEC_OMP_SIMD
:
11238 case EXEC_OMP_TARGET_SIMD
:
11239 gfc_resolve_omp_do_blocks (code
, ns
);
11241 case EXEC_SELECT_TYPE
:
11242 /* Blocks are handled in resolve_select_type because we have
11243 to transform the SELECT TYPE into ASSOCIATE first. */
11245 case EXEC_DO_CONCURRENT
:
11246 gfc_do_concurrent_flag
= 1;
11247 gfc_resolve_blocks (code
->block
, ns
);
11248 gfc_do_concurrent_flag
= 2;
11250 case EXEC_OMP_WORKSHARE
:
11251 omp_workshare_save
= omp_workshare_flag
;
11252 omp_workshare_flag
= 1;
11255 gfc_resolve_blocks (code
->block
, ns
);
11259 if (omp_workshare_save
!= -1)
11260 omp_workshare_flag
= omp_workshare_save
;
11264 if (code
->op
!= EXEC_COMPCALL
&& code
->op
!= EXEC_CALL_PPC
)
11265 t
= gfc_resolve_expr (code
->expr1
);
11266 forall_flag
= forall_save
;
11267 gfc_do_concurrent_flag
= do_concurrent_save
;
11269 if (!gfc_resolve_expr (code
->expr2
))
11272 if (code
->op
== EXEC_ALLOCATE
11273 && !gfc_resolve_expr (code
->expr3
))
11279 case EXEC_END_BLOCK
:
11280 case EXEC_END_NESTED_BLOCK
:
11284 case EXEC_ERROR_STOP
:
11286 case EXEC_CONTINUE
:
11288 case EXEC_ASSIGN_CALL
:
11291 case EXEC_CRITICAL
:
11292 resolve_critical (code
);
11295 case EXEC_SYNC_ALL
:
11296 case EXEC_SYNC_IMAGES
:
11297 case EXEC_SYNC_MEMORY
:
11298 resolve_sync (code
);
11303 case EXEC_EVENT_POST
:
11304 case EXEC_EVENT_WAIT
:
11305 resolve_lock_unlock_event (code
);
11308 case EXEC_FAIL_IMAGE
:
11309 case EXEC_FORM_TEAM
:
11310 case EXEC_CHANGE_TEAM
:
11311 case EXEC_END_TEAM
:
11312 case EXEC_SYNC_TEAM
:
11316 /* Keep track of which entry we are up to. */
11317 current_entry_id
= code
->ext
.entry
->id
;
11321 resolve_where (code
, NULL
);
11325 if (code
->expr1
!= NULL
)
11327 if (code
->expr1
->ts
.type
!= BT_INTEGER
)
11328 gfc_error ("ASSIGNED GOTO statement at %L requires an "
11329 "INTEGER variable", &code
->expr1
->where
);
11330 else if (code
->expr1
->symtree
->n
.sym
->attr
.assign
!= 1)
11331 gfc_error ("Variable %qs has not been assigned a target "
11332 "label at %L", code
->expr1
->symtree
->n
.sym
->name
,
11333 &code
->expr1
->where
);
11336 resolve_branch (code
->label1
, code
);
11340 if (code
->expr1
!= NULL
11341 && (code
->expr1
->ts
.type
!= BT_INTEGER
|| code
->expr1
->rank
))
11342 gfc_error ("Alternate RETURN statement at %L requires a SCALAR-"
11343 "INTEGER return specifier", &code
->expr1
->where
);
11346 case EXEC_INIT_ASSIGN
:
11347 case EXEC_END_PROCEDURE
:
11354 /* Remove a GFC_ISYM_CAF_GET inserted for a coindexed variable on
11356 if (code
->expr1
->expr_type
== EXPR_FUNCTION
11357 && code
->expr1
->value
.function
.isym
11358 && code
->expr1
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
)
11359 remove_caf_get_intrinsic (code
->expr1
);
11361 /* If this is a pointer function in an lvalue variable context,
11362 the new code will have to be resolved afresh. This is also the
11363 case with an error, where the code is transformed into NOP to
11364 prevent ICEs downstream. */
11365 if (resolve_ptr_fcn_assign (&code
, ns
)
11366 || code
->op
== EXEC_NOP
)
11369 if (!gfc_check_vardef_context (code
->expr1
, false, false, false,
11373 if (resolve_ordinary_assign (code
, ns
))
11375 if (code
->op
== EXEC_COMPCALL
)
11381 /* Check for dependencies in deferred character length array
11382 assignments and generate a temporary, if necessary. */
11383 if (code
->op
== EXEC_ASSIGN
&& deferred_op_assign (&code
, ns
))
11386 /* F03 7.4.1.3 for non-allocatable, non-pointer components. */
11387 if (code
->op
!= EXEC_CALL
&& code
->expr1
->ts
.type
== BT_DERIVED
11388 && code
->expr1
->ts
.u
.derived
11389 && code
->expr1
->ts
.u
.derived
->attr
.defined_assign_comp
)
11390 generate_component_assignments (&code
, ns
);
11394 case EXEC_LABEL_ASSIGN
:
11395 if (code
->label1
->defined
== ST_LABEL_UNKNOWN
)
11396 gfc_error ("Label %d referenced at %L is never defined",
11397 code
->label1
->value
, &code
->label1
->where
);
11399 && (code
->expr1
->expr_type
!= EXPR_VARIABLE
11400 || code
->expr1
->symtree
->n
.sym
->ts
.type
!= BT_INTEGER
11401 || code
->expr1
->symtree
->n
.sym
->ts
.kind
11402 != gfc_default_integer_kind
11403 || code
->expr1
->symtree
->n
.sym
->as
!= NULL
))
11404 gfc_error ("ASSIGN statement at %L requires a scalar "
11405 "default INTEGER variable", &code
->expr1
->where
);
11408 case EXEC_POINTER_ASSIGN
:
11415 /* This is both a variable definition and pointer assignment
11416 context, so check both of them. For rank remapping, a final
11417 array ref may be present on the LHS and fool gfc_expr_attr
11418 used in gfc_check_vardef_context. Remove it. */
11419 e
= remove_last_array_ref (code
->expr1
);
11420 t
= gfc_check_vardef_context (e
, true, false, false,
11421 _("pointer assignment"));
11423 t
= gfc_check_vardef_context (e
, false, false, false,
11424 _("pointer assignment"));
11427 t
= gfc_check_pointer_assign (code
->expr1
, code
->expr2
, !t
) && t
;
11432 /* Assigning a class object always is a regular assign. */
11433 if (code
->expr2
->ts
.type
== BT_CLASS
11434 && code
->expr1
->ts
.type
== BT_CLASS
11435 && !CLASS_DATA (code
->expr2
)->attr
.dimension
11436 && !(gfc_expr_attr (code
->expr1
).proc_pointer
11437 && code
->expr2
->expr_type
== EXPR_VARIABLE
11438 && code
->expr2
->symtree
->n
.sym
->attr
.flavor
11440 code
->op
= EXEC_ASSIGN
;
11444 case EXEC_ARITHMETIC_IF
:
11446 gfc_expr
*e
= code
->expr1
;
11448 gfc_resolve_expr (e
);
11449 if (e
->expr_type
== EXPR_NULL
)
11450 gfc_error ("Invalid NULL at %L", &e
->where
);
11452 if (t
&& (e
->rank
> 0
11453 || !(e
->ts
.type
== BT_REAL
|| e
->ts
.type
== BT_INTEGER
)))
11454 gfc_error ("Arithmetic IF statement at %L requires a scalar "
11455 "REAL or INTEGER expression", &e
->where
);
11457 resolve_branch (code
->label1
, code
);
11458 resolve_branch (code
->label2
, code
);
11459 resolve_branch (code
->label3
, code
);
11464 if (t
&& code
->expr1
!= NULL
11465 && (code
->expr1
->ts
.type
!= BT_LOGICAL
11466 || code
->expr1
->rank
!= 0))
11467 gfc_error ("IF clause at %L requires a scalar LOGICAL expression",
11468 &code
->expr1
->where
);
11473 resolve_call (code
);
11476 case EXEC_COMPCALL
:
11478 resolve_typebound_subroutine (code
);
11481 case EXEC_CALL_PPC
:
11482 resolve_ppc_call (code
);
11486 /* Select is complicated. Also, a SELECT construct could be
11487 a transformed computed GOTO. */
11488 resolve_select (code
, false);
11491 case EXEC_SELECT_TYPE
:
11492 resolve_select_type (code
, ns
);
11496 resolve_block_construct (code
);
11500 if (code
->ext
.iterator
!= NULL
)
11502 gfc_iterator
*iter
= code
->ext
.iterator
;
11503 if (gfc_resolve_iterator (iter
, true, false))
11504 gfc_resolve_do_iterator (code
, iter
->var
->symtree
->n
.sym
,
11509 case EXEC_DO_WHILE
:
11510 if (code
->expr1
== NULL
)
11511 gfc_internal_error ("gfc_resolve_code(): No expression on "
11514 && (code
->expr1
->rank
!= 0
11515 || code
->expr1
->ts
.type
!= BT_LOGICAL
))
11516 gfc_error ("Exit condition of DO WHILE loop at %L must be "
11517 "a scalar LOGICAL expression", &code
->expr1
->where
);
11520 case EXEC_ALLOCATE
:
11522 resolve_allocate_deallocate (code
, "ALLOCATE");
11526 case EXEC_DEALLOCATE
:
11528 resolve_allocate_deallocate (code
, "DEALLOCATE");
11533 if (!gfc_resolve_open (code
->ext
.open
))
11536 resolve_branch (code
->ext
.open
->err
, code
);
11540 if (!gfc_resolve_close (code
->ext
.close
))
11543 resolve_branch (code
->ext
.close
->err
, code
);
11546 case EXEC_BACKSPACE
:
11550 if (!gfc_resolve_filepos (code
->ext
.filepos
, &code
->loc
))
11553 resolve_branch (code
->ext
.filepos
->err
, code
);
11557 if (!gfc_resolve_inquire (code
->ext
.inquire
))
11560 resolve_branch (code
->ext
.inquire
->err
, code
);
11563 case EXEC_IOLENGTH
:
11564 gcc_assert (code
->ext
.inquire
!= NULL
);
11565 if (!gfc_resolve_inquire (code
->ext
.inquire
))
11568 resolve_branch (code
->ext
.inquire
->err
, code
);
11572 if (!gfc_resolve_wait (code
->ext
.wait
))
11575 resolve_branch (code
->ext
.wait
->err
, code
);
11576 resolve_branch (code
->ext
.wait
->end
, code
);
11577 resolve_branch (code
->ext
.wait
->eor
, code
);
11582 if (!gfc_resolve_dt (code
->ext
.dt
, &code
->loc
))
11585 resolve_branch (code
->ext
.dt
->err
, code
);
11586 resolve_branch (code
->ext
.dt
->end
, code
);
11587 resolve_branch (code
->ext
.dt
->eor
, code
);
11590 case EXEC_TRANSFER
:
11591 resolve_transfer (code
);
11594 case EXEC_DO_CONCURRENT
:
11596 resolve_forall_iterators (code
->ext
.forall_iterator
);
11598 if (code
->expr1
!= NULL
11599 && (code
->expr1
->ts
.type
!= BT_LOGICAL
|| code
->expr1
->rank
))
11600 gfc_error ("FORALL mask clause at %L requires a scalar LOGICAL "
11601 "expression", &code
->expr1
->where
);
11604 case EXEC_OACC_PARALLEL_LOOP
:
11605 case EXEC_OACC_PARALLEL
:
11606 case EXEC_OACC_KERNELS_LOOP
:
11607 case EXEC_OACC_KERNELS
:
11608 case EXEC_OACC_DATA
:
11609 case EXEC_OACC_HOST_DATA
:
11610 case EXEC_OACC_LOOP
:
11611 case EXEC_OACC_UPDATE
:
11612 case EXEC_OACC_WAIT
:
11613 case EXEC_OACC_CACHE
:
11614 case EXEC_OACC_ENTER_DATA
:
11615 case EXEC_OACC_EXIT_DATA
:
11616 case EXEC_OACC_ATOMIC
:
11617 case EXEC_OACC_DECLARE
:
11618 gfc_resolve_oacc_directive (code
, ns
);
11621 case EXEC_OMP_ATOMIC
:
11622 case EXEC_OMP_BARRIER
:
11623 case EXEC_OMP_CANCEL
:
11624 case EXEC_OMP_CANCELLATION_POINT
:
11625 case EXEC_OMP_CRITICAL
:
11626 case EXEC_OMP_FLUSH
:
11627 case EXEC_OMP_DISTRIBUTE
:
11628 case EXEC_OMP_DISTRIBUTE_PARALLEL_DO
:
11629 case EXEC_OMP_DISTRIBUTE_PARALLEL_DO_SIMD
:
11630 case EXEC_OMP_DISTRIBUTE_SIMD
:
11632 case EXEC_OMP_DO_SIMD
:
11633 case EXEC_OMP_MASTER
:
11634 case EXEC_OMP_ORDERED
:
11635 case EXEC_OMP_SECTIONS
:
11636 case EXEC_OMP_SIMD
:
11637 case EXEC_OMP_SINGLE
:
11638 case EXEC_OMP_TARGET
:
11639 case EXEC_OMP_TARGET_DATA
:
11640 case EXEC_OMP_TARGET_ENTER_DATA
:
11641 case EXEC_OMP_TARGET_EXIT_DATA
:
11642 case EXEC_OMP_TARGET_PARALLEL
:
11643 case EXEC_OMP_TARGET_PARALLEL_DO
:
11644 case EXEC_OMP_TARGET_PARALLEL_DO_SIMD
:
11645 case EXEC_OMP_TARGET_SIMD
:
11646 case EXEC_OMP_TARGET_TEAMS
:
11647 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE
:
11648 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO
:
11649 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
11650 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_SIMD
:
11651 case EXEC_OMP_TARGET_UPDATE
:
11652 case EXEC_OMP_TASK
:
11653 case EXEC_OMP_TASKGROUP
:
11654 case EXEC_OMP_TASKLOOP
:
11655 case EXEC_OMP_TASKLOOP_SIMD
:
11656 case EXEC_OMP_TASKWAIT
:
11657 case EXEC_OMP_TASKYIELD
:
11658 case EXEC_OMP_TEAMS
:
11659 case EXEC_OMP_TEAMS_DISTRIBUTE
:
11660 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO
:
11661 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
11662 case EXEC_OMP_TEAMS_DISTRIBUTE_SIMD
:
11663 case EXEC_OMP_WORKSHARE
:
11664 gfc_resolve_omp_directive (code
, ns
);
11667 case EXEC_OMP_PARALLEL
:
11668 case EXEC_OMP_PARALLEL_DO
:
11669 case EXEC_OMP_PARALLEL_DO_SIMD
:
11670 case EXEC_OMP_PARALLEL_SECTIONS
:
11671 case EXEC_OMP_PARALLEL_WORKSHARE
:
11672 omp_workshare_save
= omp_workshare_flag
;
11673 omp_workshare_flag
= 0;
11674 gfc_resolve_omp_directive (code
, ns
);
11675 omp_workshare_flag
= omp_workshare_save
;
11679 gfc_internal_error ("gfc_resolve_code(): Bad statement code");
11683 cs_base
= frame
.prev
;
11687 /* Resolve initial values and make sure they are compatible with
11691 resolve_values (gfc_symbol
*sym
)
11695 if (sym
->value
== NULL
)
11698 if (sym
->value
->expr_type
== EXPR_STRUCTURE
)
11699 t
= resolve_structure_cons (sym
->value
, 1);
11701 t
= gfc_resolve_expr (sym
->value
);
11706 gfc_check_assign_symbol (sym
, NULL
, sym
->value
);
11710 /* Verify any BIND(C) derived types in the namespace so we can report errors
11711 for them once, rather than for each variable declared of that type. */
11714 resolve_bind_c_derived_types (gfc_symbol
*derived_sym
)
11716 if (derived_sym
!= NULL
&& derived_sym
->attr
.flavor
== FL_DERIVED
11717 && derived_sym
->attr
.is_bind_c
== 1)
11718 verify_bind_c_derived_type (derived_sym
);
11724 /* Check the interfaces of DTIO procedures associated with derived
11725 type 'sym'. These procedures can either have typebound bindings or
11726 can appear in DTIO generic interfaces. */
11729 gfc_verify_DTIO_procedures (gfc_symbol
*sym
)
11731 if (!sym
|| sym
->attr
.flavor
!= FL_DERIVED
)
11734 gfc_check_dtio_interfaces (sym
);
11739 /* Verify that any binding labels used in a given namespace do not collide
11740 with the names or binding labels of any global symbols. Multiple INTERFACE
11741 for the same procedure are permitted. */
11744 gfc_verify_binding_labels (gfc_symbol
*sym
)
11747 const char *module
;
11749 if (!sym
|| !sym
->attr
.is_bind_c
|| sym
->attr
.is_iso_c
11750 || sym
->attr
.flavor
== FL_DERIVED
|| !sym
->binding_label
)
11753 gsym
= gfc_find_case_gsymbol (gfc_gsym_root
, sym
->binding_label
);
11756 module
= sym
->module
;
11757 else if (sym
->ns
&& sym
->ns
->proc_name
11758 && sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
)
11759 module
= sym
->ns
->proc_name
->name
;
11760 else if (sym
->ns
&& sym
->ns
->parent
11761 && sym
->ns
&& sym
->ns
->parent
->proc_name
11762 && sym
->ns
->parent
->proc_name
->attr
.flavor
== FL_MODULE
)
11763 module
= sym
->ns
->parent
->proc_name
->name
;
11769 && (gsym
->type
== GSYM_FUNCTION
|| gsym
->type
== GSYM_SUBROUTINE
)))
11772 gsym
= gfc_get_gsymbol (sym
->binding_label
);
11773 gsym
->where
= sym
->declared_at
;
11774 gsym
->sym_name
= sym
->name
;
11775 gsym
->binding_label
= sym
->binding_label
;
11776 gsym
->ns
= sym
->ns
;
11777 gsym
->mod_name
= module
;
11778 if (sym
->attr
.function
)
11779 gsym
->type
= GSYM_FUNCTION
;
11780 else if (sym
->attr
.subroutine
)
11781 gsym
->type
= GSYM_SUBROUTINE
;
11782 /* Mark as variable/procedure as defined, unless its an INTERFACE. */
11783 gsym
->defined
= sym
->attr
.if_source
!= IFSRC_IFBODY
;
11787 if (sym
->attr
.flavor
== FL_VARIABLE
&& gsym
->type
!= GSYM_UNKNOWN
)
11789 gfc_error ("Variable %qs with binding label %qs at %L uses the same global "
11790 "identifier as entity at %L", sym
->name
,
11791 sym
->binding_label
, &sym
->declared_at
, &gsym
->where
);
11792 /* Clear the binding label to prevent checking multiple times. */
11793 sym
->binding_label
= NULL
;
11796 else if (sym
->attr
.flavor
== FL_VARIABLE
&& module
11797 && (strcmp (module
, gsym
->mod_name
) != 0
11798 || strcmp (sym
->name
, gsym
->sym_name
) != 0))
11800 /* This can only happen if the variable is defined in a module - if it
11801 isn't the same module, reject it. */
11802 gfc_error ("Variable %qs from module %qs with binding label %qs at %L "
11803 "uses the same global identifier as entity at %L from module %qs",
11804 sym
->name
, module
, sym
->binding_label
,
11805 &sym
->declared_at
, &gsym
->where
, gsym
->mod_name
);
11806 sym
->binding_label
= NULL
;
11808 else if ((sym
->attr
.function
|| sym
->attr
.subroutine
)
11809 && ((gsym
->type
!= GSYM_SUBROUTINE
&& gsym
->type
!= GSYM_FUNCTION
)
11810 || (gsym
->defined
&& sym
->attr
.if_source
!= IFSRC_IFBODY
))
11811 && sym
!= gsym
->ns
->proc_name
11812 && (module
!= gsym
->mod_name
11813 || strcmp (gsym
->sym_name
, sym
->name
) != 0
11814 || (module
&& strcmp (module
, gsym
->mod_name
) != 0)))
11816 /* Print an error if the procedure is defined multiple times; we have to
11817 exclude references to the same procedure via module association or
11818 multiple checks for the same procedure. */
11819 gfc_error ("Procedure %qs with binding label %qs at %L uses the same "
11820 "global identifier as entity at %L", sym
->name
,
11821 sym
->binding_label
, &sym
->declared_at
, &gsym
->where
);
11822 sym
->binding_label
= NULL
;
11827 /* Resolve an index expression. */
11830 resolve_index_expr (gfc_expr
*e
)
11832 if (!gfc_resolve_expr (e
))
11835 if (!gfc_simplify_expr (e
, 0))
11838 if (!gfc_specification_expr (e
))
11845 /* Resolve a charlen structure. */
11848 resolve_charlen (gfc_charlen
*cl
)
11851 bool saved_specification_expr
;
11857 saved_specification_expr
= specification_expr
;
11858 specification_expr
= true;
11860 if (cl
->length_from_typespec
)
11862 if (!gfc_resolve_expr (cl
->length
))
11864 specification_expr
= saved_specification_expr
;
11868 if (!gfc_simplify_expr (cl
->length
, 0))
11870 specification_expr
= saved_specification_expr
;
11874 /* cl->length has been resolved. It should have an integer type. */
11875 if (cl
->length
->ts
.type
!= BT_INTEGER
)
11877 gfc_error ("Scalar INTEGER expression expected at %L",
11878 &cl
->length
->where
);
11884 if (!resolve_index_expr (cl
->length
))
11886 specification_expr
= saved_specification_expr
;
11891 /* F2008, 4.4.3.2: If the character length parameter value evaluates to
11892 a negative value, the length of character entities declared is zero. */
11893 if (cl
->length
&& cl
->length
->expr_type
== EXPR_CONSTANT
11894 && mpz_sgn (cl
->length
->value
.integer
) < 0)
11895 gfc_replace_expr (cl
->length
,
11896 gfc_get_int_expr (gfc_charlen_int_kind
, NULL
, 0));
11898 /* Check that the character length is not too large. */
11899 k
= gfc_validate_kind (BT_INTEGER
, gfc_charlen_int_kind
, false);
11900 if (cl
->length
&& cl
->length
->expr_type
== EXPR_CONSTANT
11901 && cl
->length
->ts
.type
== BT_INTEGER
11902 && mpz_cmp (cl
->length
->value
.integer
, gfc_integer_kinds
[k
].huge
) > 0)
11904 gfc_error ("String length at %L is too large", &cl
->length
->where
);
11905 specification_expr
= saved_specification_expr
;
11909 specification_expr
= saved_specification_expr
;
11914 /* Test for non-constant shape arrays. */
11917 is_non_constant_shape_array (gfc_symbol
*sym
)
11923 not_constant
= false;
11924 if (sym
->as
!= NULL
)
11926 /* Unfortunately, !gfc_is_compile_time_shape hits a legal case that
11927 has not been simplified; parameter array references. Do the
11928 simplification now. */
11929 for (i
= 0; i
< sym
->as
->rank
+ sym
->as
->corank
; i
++)
11931 e
= sym
->as
->lower
[i
];
11932 if (e
&& (!resolve_index_expr(e
)
11933 || !gfc_is_constant_expr (e
)))
11934 not_constant
= true;
11935 e
= sym
->as
->upper
[i
];
11936 if (e
&& (!resolve_index_expr(e
)
11937 || !gfc_is_constant_expr (e
)))
11938 not_constant
= true;
11941 return not_constant
;
11944 /* Given a symbol and an initialization expression, add code to initialize
11945 the symbol to the function entry. */
11947 build_init_assign (gfc_symbol
*sym
, gfc_expr
*init
)
11951 gfc_namespace
*ns
= sym
->ns
;
11953 /* Search for the function namespace if this is a contained
11954 function without an explicit result. */
11955 if (sym
->attr
.function
&& sym
== sym
->result
11956 && sym
->name
!= sym
->ns
->proc_name
->name
)
11958 ns
= ns
->contained
;
11959 for (;ns
; ns
= ns
->sibling
)
11960 if (strcmp (ns
->proc_name
->name
, sym
->name
) == 0)
11966 gfc_free_expr (init
);
11970 /* Build an l-value expression for the result. */
11971 lval
= gfc_lval_expr_from_sym (sym
);
11973 /* Add the code at scope entry. */
11974 init_st
= gfc_get_code (EXEC_INIT_ASSIGN
);
11975 init_st
->next
= ns
->code
;
11976 ns
->code
= init_st
;
11978 /* Assign the default initializer to the l-value. */
11979 init_st
->loc
= sym
->declared_at
;
11980 init_st
->expr1
= lval
;
11981 init_st
->expr2
= init
;
11985 /* Whether or not we can generate a default initializer for a symbol. */
11988 can_generate_init (gfc_symbol
*sym
)
11990 symbol_attribute
*a
;
11995 /* These symbols should never have a default initialization. */
12000 || (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
)
12001 && (CLASS_DATA (sym
)->attr
.class_pointer
12002 || CLASS_DATA (sym
)->attr
.proc_pointer
))
12003 || a
->in_equivalence
12010 || (!a
->referenced
&& !a
->result
)
12011 || (a
->dummy
&& a
->intent
!= INTENT_OUT
)
12012 || (a
->function
&& sym
!= sym
->result
)
12017 /* Assign the default initializer to a derived type variable or result. */
12020 apply_default_init (gfc_symbol
*sym
)
12022 gfc_expr
*init
= NULL
;
12024 if (sym
->attr
.flavor
!= FL_VARIABLE
&& !sym
->attr
.function
)
12027 if (sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
)
12028 init
= gfc_generate_initializer (&sym
->ts
, can_generate_init (sym
));
12030 if (init
== NULL
&& sym
->ts
.type
!= BT_CLASS
)
12033 build_init_assign (sym
, init
);
12034 sym
->attr
.referenced
= 1;
12038 /* Build an initializer for a local. Returns null if the symbol should not have
12039 a default initialization. */
12042 build_default_init_expr (gfc_symbol
*sym
)
12044 /* These symbols should never have a default initialization. */
12045 if (sym
->attr
.allocatable
12046 || sym
->attr
.external
12048 || sym
->attr
.pointer
12049 || sym
->attr
.in_equivalence
12050 || sym
->attr
.in_common
12053 || sym
->attr
.cray_pointee
12054 || sym
->attr
.cray_pointer
12058 /* Get the appropriate init expression. */
12059 return gfc_build_default_init_expr (&sym
->ts
, &sym
->declared_at
);
12062 /* Add an initialization expression to a local variable. */
12064 apply_default_init_local (gfc_symbol
*sym
)
12066 gfc_expr
*init
= NULL
;
12068 /* The symbol should be a variable or a function return value. */
12069 if ((sym
->attr
.flavor
!= FL_VARIABLE
&& !sym
->attr
.function
)
12070 || (sym
->attr
.function
&& sym
->result
!= sym
))
12073 /* Try to build the initializer expression. If we can't initialize
12074 this symbol, then init will be NULL. */
12075 init
= build_default_init_expr (sym
);
12079 /* For saved variables, we don't want to add an initializer at function
12080 entry, so we just add a static initializer. Note that automatic variables
12081 are stack allocated even with -fno-automatic; we have also to exclude
12082 result variable, which are also nonstatic. */
12083 if (!sym
->attr
.automatic
12084 && (sym
->attr
.save
|| sym
->ns
->save_all
12085 || (flag_max_stack_var_size
== 0 && !sym
->attr
.result
12086 && (sym
->ns
->proc_name
&& !sym
->ns
->proc_name
->attr
.recursive
)
12087 && (!sym
->attr
.dimension
|| !is_non_constant_shape_array (sym
)))))
12089 /* Don't clobber an existing initializer! */
12090 gcc_assert (sym
->value
== NULL
);
12095 build_init_assign (sym
, init
);
12099 /* Resolution of common features of flavors variable and procedure. */
12102 resolve_fl_var_and_proc (gfc_symbol
*sym
, int mp_flag
)
12104 gfc_array_spec
*as
;
12106 if (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
)
12107 as
= CLASS_DATA (sym
)->as
;
12111 /* Constraints on deferred shape variable. */
12112 if (as
== NULL
|| as
->type
!= AS_DEFERRED
)
12114 bool pointer
, allocatable
, dimension
;
12116 if (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
)
12118 pointer
= CLASS_DATA (sym
)->attr
.class_pointer
;
12119 allocatable
= CLASS_DATA (sym
)->attr
.allocatable
;
12120 dimension
= CLASS_DATA (sym
)->attr
.dimension
;
12124 pointer
= sym
->attr
.pointer
&& !sym
->attr
.select_type_temporary
;
12125 allocatable
= sym
->attr
.allocatable
;
12126 dimension
= sym
->attr
.dimension
;
12131 if (dimension
&& as
->type
!= AS_ASSUMED_RANK
)
12133 gfc_error ("Allocatable array %qs at %L must have a deferred "
12134 "shape or assumed rank", sym
->name
, &sym
->declared_at
);
12137 else if (!gfc_notify_std (GFC_STD_F2003
, "Scalar object "
12138 "%qs at %L may not be ALLOCATABLE",
12139 sym
->name
, &sym
->declared_at
))
12143 if (pointer
&& dimension
&& as
->type
!= AS_ASSUMED_RANK
)
12145 gfc_error ("Array pointer %qs at %L must have a deferred shape or "
12146 "assumed rank", sym
->name
, &sym
->declared_at
);
12152 if (!mp_flag
&& !sym
->attr
.allocatable
&& !sym
->attr
.pointer
12153 && sym
->ts
.type
!= BT_CLASS
&& !sym
->assoc
)
12155 gfc_error ("Array %qs at %L cannot have a deferred shape",
12156 sym
->name
, &sym
->declared_at
);
12161 /* Constraints on polymorphic variables. */
12162 if (sym
->ts
.type
== BT_CLASS
&& !(sym
->result
&& sym
->result
!= sym
))
12165 if (sym
->attr
.class_ok
12166 && !sym
->attr
.select_type_temporary
12167 && !UNLIMITED_POLY (sym
)
12168 && !gfc_type_is_extensible (CLASS_DATA (sym
)->ts
.u
.derived
))
12170 gfc_error ("Type %qs of CLASS variable %qs at %L is not extensible",
12171 CLASS_DATA (sym
)->ts
.u
.derived
->name
, sym
->name
,
12172 &sym
->declared_at
);
12177 /* Assume that use associated symbols were checked in the module ns.
12178 Class-variables that are associate-names are also something special
12179 and excepted from the test. */
12180 if (!sym
->attr
.class_ok
&& !sym
->attr
.use_assoc
&& !sym
->assoc
)
12182 gfc_error ("CLASS variable %qs at %L must be dummy, allocatable "
12183 "or pointer", sym
->name
, &sym
->declared_at
);
12192 /* Additional checks for symbols with flavor variable and derived
12193 type. To be called from resolve_fl_variable. */
12196 resolve_fl_variable_derived (gfc_symbol
*sym
, int no_init_flag
)
12198 gcc_assert (sym
->ts
.type
== BT_DERIVED
|| sym
->ts
.type
== BT_CLASS
);
12200 /* Check to see if a derived type is blocked from being host
12201 associated by the presence of another class I symbol in the same
12202 namespace. 14.6.1.3 of the standard and the discussion on
12203 comp.lang.fortran. */
12204 if (sym
->ns
!= sym
->ts
.u
.derived
->ns
12205 && !sym
->ts
.u
.derived
->attr
.use_assoc
12206 && sym
->ns
->proc_name
->attr
.if_source
!= IFSRC_IFBODY
)
12209 gfc_find_symbol (sym
->ts
.u
.derived
->name
, sym
->ns
, 0, &s
);
12210 if (s
&& s
->attr
.generic
)
12211 s
= gfc_find_dt_in_generic (s
);
12212 if (s
&& !gfc_fl_struct (s
->attr
.flavor
))
12214 gfc_error ("The type %qs cannot be host associated at %L "
12215 "because it is blocked by an incompatible object "
12216 "of the same name declared at %L",
12217 sym
->ts
.u
.derived
->name
, &sym
->declared_at
,
12223 /* 4th constraint in section 11.3: "If an object of a type for which
12224 component-initialization is specified (R429) appears in the
12225 specification-part of a module and does not have the ALLOCATABLE
12226 or POINTER attribute, the object shall have the SAVE attribute."
12228 The check for initializers is performed with
12229 gfc_has_default_initializer because gfc_default_initializer generates
12230 a hidden default for allocatable components. */
12231 if (!(sym
->value
|| no_init_flag
) && sym
->ns
->proc_name
12232 && sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
12233 && !(sym
->ns
->save_all
&& !sym
->attr
.automatic
) && !sym
->attr
.save
12234 && !sym
->attr
.pointer
&& !sym
->attr
.allocatable
12235 && gfc_has_default_initializer (sym
->ts
.u
.derived
)
12236 && !gfc_notify_std (GFC_STD_F2008
, "Implied SAVE for module variable "
12237 "%qs at %L, needed due to the default "
12238 "initialization", sym
->name
, &sym
->declared_at
))
12241 /* Assign default initializer. */
12242 if (!(sym
->value
|| sym
->attr
.pointer
|| sym
->attr
.allocatable
)
12243 && (!no_init_flag
|| sym
->attr
.intent
== INTENT_OUT
))
12244 sym
->value
= gfc_generate_initializer (&sym
->ts
, can_generate_init (sym
));
12250 /* F2008, C402 (R401): A colon shall not be used as a type-param-value
12251 except in the declaration of an entity or component that has the POINTER
12252 or ALLOCATABLE attribute. */
12255 deferred_requirements (gfc_symbol
*sym
)
12257 if (sym
->ts
.deferred
12258 && !(sym
->attr
.pointer
12259 || sym
->attr
.allocatable
12260 || sym
->attr
.associate_var
12261 || sym
->attr
.omp_udr_artificial_var
))
12263 gfc_error ("Entity %qs at %L has a deferred type parameter and "
12264 "requires either the POINTER or ALLOCATABLE attribute",
12265 sym
->name
, &sym
->declared_at
);
12272 /* Resolve symbols with flavor variable. */
12275 resolve_fl_variable (gfc_symbol
*sym
, int mp_flag
)
12277 const char *auto_save_msg
= "Automatic object %qs at %L cannot have the "
12280 if (!resolve_fl_var_and_proc (sym
, mp_flag
))
12283 /* Set this flag to check that variables are parameters of all entries.
12284 This check is effected by the call to gfc_resolve_expr through
12285 is_non_constant_shape_array. */
12286 bool saved_specification_expr
= specification_expr
;
12287 specification_expr
= true;
12289 if (sym
->ns
->proc_name
12290 && (sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
12291 || sym
->ns
->proc_name
->attr
.is_main_program
)
12292 && !sym
->attr
.use_assoc
12293 && !sym
->attr
.allocatable
12294 && !sym
->attr
.pointer
12295 && is_non_constant_shape_array (sym
))
12297 /* F08:C541. The shape of an array defined in a main program or module
12298 * needs to be constant. */
12299 gfc_error ("The module or main program array %qs at %L must "
12300 "have constant shape", sym
->name
, &sym
->declared_at
);
12301 specification_expr
= saved_specification_expr
;
12305 /* Constraints on deferred type parameter. */
12306 if (!deferred_requirements (sym
))
12309 if (sym
->ts
.type
== BT_CHARACTER
&& !sym
->attr
.associate_var
)
12311 /* Make sure that character string variables with assumed length are
12312 dummy arguments. */
12313 gfc_expr
*e
= NULL
;
12316 e
= sym
->ts
.u
.cl
->length
;
12320 if (e
== NULL
&& !sym
->attr
.dummy
&& !sym
->attr
.result
12321 && !sym
->ts
.deferred
&& !sym
->attr
.select_type_temporary
12322 && !sym
->attr
.omp_udr_artificial_var
)
12324 gfc_error ("Entity with assumed character length at %L must be a "
12325 "dummy argument or a PARAMETER", &sym
->declared_at
);
12326 specification_expr
= saved_specification_expr
;
12330 if (e
&& sym
->attr
.save
== SAVE_EXPLICIT
&& !gfc_is_constant_expr (e
))
12332 gfc_error (auto_save_msg
, sym
->name
, &sym
->declared_at
);
12333 specification_expr
= saved_specification_expr
;
12337 if (!gfc_is_constant_expr (e
)
12338 && !(e
->expr_type
== EXPR_VARIABLE
12339 && e
->symtree
->n
.sym
->attr
.flavor
== FL_PARAMETER
))
12341 if (!sym
->attr
.use_assoc
&& sym
->ns
->proc_name
12342 && (sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
12343 || sym
->ns
->proc_name
->attr
.is_main_program
))
12345 gfc_error ("%qs at %L must have constant character length "
12346 "in this context", sym
->name
, &sym
->declared_at
);
12347 specification_expr
= saved_specification_expr
;
12350 if (sym
->attr
.in_common
)
12352 gfc_error ("COMMON variable %qs at %L must have constant "
12353 "character length", sym
->name
, &sym
->declared_at
);
12354 specification_expr
= saved_specification_expr
;
12360 if (sym
->value
== NULL
&& sym
->attr
.referenced
)
12361 apply_default_init_local (sym
); /* Try to apply a default initialization. */
12363 /* Determine if the symbol may not have an initializer. */
12364 int no_init_flag
= 0, automatic_flag
= 0;
12365 if (sym
->attr
.allocatable
|| sym
->attr
.external
|| sym
->attr
.dummy
12366 || sym
->attr
.intrinsic
|| sym
->attr
.result
)
12368 else if ((sym
->attr
.dimension
|| sym
->attr
.codimension
) && !sym
->attr
.pointer
12369 && is_non_constant_shape_array (sym
))
12371 no_init_flag
= automatic_flag
= 1;
12373 /* Also, they must not have the SAVE attribute.
12374 SAVE_IMPLICIT is checked below. */
12375 if (sym
->as
&& sym
->attr
.codimension
)
12377 int corank
= sym
->as
->corank
;
12378 sym
->as
->corank
= 0;
12379 no_init_flag
= automatic_flag
= is_non_constant_shape_array (sym
);
12380 sym
->as
->corank
= corank
;
12382 if (automatic_flag
&& sym
->attr
.save
== SAVE_EXPLICIT
)
12384 gfc_error (auto_save_msg
, sym
->name
, &sym
->declared_at
);
12385 specification_expr
= saved_specification_expr
;
12390 /* Ensure that any initializer is simplified. */
12392 gfc_simplify_expr (sym
->value
, 1);
12394 /* Reject illegal initializers. */
12395 if (!sym
->mark
&& sym
->value
)
12397 if (sym
->attr
.allocatable
|| (sym
->ts
.type
== BT_CLASS
12398 && CLASS_DATA (sym
)->attr
.allocatable
))
12399 gfc_error ("Allocatable %qs at %L cannot have an initializer",
12400 sym
->name
, &sym
->declared_at
);
12401 else if (sym
->attr
.external
)
12402 gfc_error ("External %qs at %L cannot have an initializer",
12403 sym
->name
, &sym
->declared_at
);
12404 else if (sym
->attr
.dummy
12405 && !(sym
->ts
.type
== BT_DERIVED
&& sym
->attr
.intent
== INTENT_OUT
))
12406 gfc_error ("Dummy %qs at %L cannot have an initializer",
12407 sym
->name
, &sym
->declared_at
);
12408 else if (sym
->attr
.intrinsic
)
12409 gfc_error ("Intrinsic %qs at %L cannot have an initializer",
12410 sym
->name
, &sym
->declared_at
);
12411 else if (sym
->attr
.result
)
12412 gfc_error ("Function result %qs at %L cannot have an initializer",
12413 sym
->name
, &sym
->declared_at
);
12414 else if (automatic_flag
)
12415 gfc_error ("Automatic array %qs at %L cannot have an initializer",
12416 sym
->name
, &sym
->declared_at
);
12418 goto no_init_error
;
12419 specification_expr
= saved_specification_expr
;
12424 if (sym
->ts
.type
== BT_DERIVED
|| sym
->ts
.type
== BT_CLASS
)
12426 bool res
= resolve_fl_variable_derived (sym
, no_init_flag
);
12427 specification_expr
= saved_specification_expr
;
12431 specification_expr
= saved_specification_expr
;
12436 /* Compare the dummy characteristics of a module procedure interface
12437 declaration with the corresponding declaration in a submodule. */
12438 static gfc_formal_arglist
*new_formal
;
12439 static char errmsg
[200];
12442 compare_fsyms (gfc_symbol
*sym
)
12446 if (sym
== NULL
|| new_formal
== NULL
)
12449 fsym
= new_formal
->sym
;
12454 if (strcmp (sym
->name
, fsym
->name
) == 0)
12456 if (!gfc_check_dummy_characteristics (fsym
, sym
, true, errmsg
, 200))
12457 gfc_error ("%s at %L", errmsg
, &fsym
->declared_at
);
12462 /* Resolve a procedure. */
12465 resolve_fl_procedure (gfc_symbol
*sym
, int mp_flag
)
12467 gfc_formal_arglist
*arg
;
12469 if (sym
->attr
.function
12470 && !resolve_fl_var_and_proc (sym
, mp_flag
))
12473 if (sym
->ts
.type
== BT_CHARACTER
)
12475 gfc_charlen
*cl
= sym
->ts
.u
.cl
;
12477 if (cl
&& cl
->length
&& gfc_is_constant_expr (cl
->length
)
12478 && !resolve_charlen (cl
))
12481 if ((!cl
|| !cl
->length
|| cl
->length
->expr_type
!= EXPR_CONSTANT
)
12482 && sym
->attr
.proc
== PROC_ST_FUNCTION
)
12484 gfc_error ("Character-valued statement function %qs at %L must "
12485 "have constant length", sym
->name
, &sym
->declared_at
);
12490 /* Ensure that derived type for are not of a private type. Internal
12491 module procedures are excluded by 2.2.3.3 - i.e., they are not
12492 externally accessible and can access all the objects accessible in
12494 if (!(sym
->ns
->parent
&& sym
->ns
->parent
->proc_name
12495 && sym
->ns
->parent
->proc_name
->attr
.flavor
== FL_MODULE
)
12496 && gfc_check_symbol_access (sym
))
12498 gfc_interface
*iface
;
12500 for (arg
= gfc_sym_get_dummy_args (sym
); arg
; arg
= arg
->next
)
12503 && arg
->sym
->ts
.type
== BT_DERIVED
12504 && !arg
->sym
->ts
.u
.derived
->attr
.use_assoc
12505 && !gfc_check_symbol_access (arg
->sym
->ts
.u
.derived
)
12506 && !gfc_notify_std (GFC_STD_F2003
, "%qs is of a PRIVATE type "
12507 "and cannot be a dummy argument"
12508 " of %qs, which is PUBLIC at %L",
12509 arg
->sym
->name
, sym
->name
,
12510 &sym
->declared_at
))
12512 /* Stop this message from recurring. */
12513 arg
->sym
->ts
.u
.derived
->attr
.access
= ACCESS_PUBLIC
;
12518 /* PUBLIC interfaces may expose PRIVATE procedures that take types
12519 PRIVATE to the containing module. */
12520 for (iface
= sym
->generic
; iface
; iface
= iface
->next
)
12522 for (arg
= gfc_sym_get_dummy_args (iface
->sym
); arg
; arg
= arg
->next
)
12525 && arg
->sym
->ts
.type
== BT_DERIVED
12526 && !arg
->sym
->ts
.u
.derived
->attr
.use_assoc
12527 && !gfc_check_symbol_access (arg
->sym
->ts
.u
.derived
)
12528 && !gfc_notify_std (GFC_STD_F2003
, "Procedure %qs in "
12529 "PUBLIC interface %qs at %L "
12530 "takes dummy arguments of %qs which "
12531 "is PRIVATE", iface
->sym
->name
,
12532 sym
->name
, &iface
->sym
->declared_at
,
12533 gfc_typename(&arg
->sym
->ts
)))
12535 /* Stop this message from recurring. */
12536 arg
->sym
->ts
.u
.derived
->attr
.access
= ACCESS_PUBLIC
;
12543 if (sym
->attr
.function
&& sym
->value
&& sym
->attr
.proc
!= PROC_ST_FUNCTION
12544 && !sym
->attr
.proc_pointer
)
12546 gfc_error ("Function %qs at %L cannot have an initializer",
12547 sym
->name
, &sym
->declared_at
);
12549 /* Make sure no second error is issued for this. */
12550 sym
->value
->error
= 1;
12554 /* An external symbol may not have an initializer because it is taken to be
12555 a procedure. Exception: Procedure Pointers. */
12556 if (sym
->attr
.external
&& sym
->value
&& !sym
->attr
.proc_pointer
)
12558 gfc_error ("External object %qs at %L may not have an initializer",
12559 sym
->name
, &sym
->declared_at
);
12563 /* An elemental function is required to return a scalar 12.7.1 */
12564 if (sym
->attr
.elemental
&& sym
->attr
.function
12565 && (sym
->as
|| (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
)->as
)))
12567 gfc_error ("ELEMENTAL function %qs at %L must have a scalar "
12568 "result", sym
->name
, &sym
->declared_at
);
12569 /* Reset so that the error only occurs once. */
12570 sym
->attr
.elemental
= 0;
12574 if (sym
->attr
.proc
== PROC_ST_FUNCTION
12575 && (sym
->attr
.allocatable
|| sym
->attr
.pointer
))
12577 gfc_error ("Statement function %qs at %L may not have pointer or "
12578 "allocatable attribute", sym
->name
, &sym
->declared_at
);
12582 /* 5.1.1.5 of the Standard: A function name declared with an asterisk
12583 char-len-param shall not be array-valued, pointer-valued, recursive
12584 or pure. ....snip... A character value of * may only be used in the
12585 following ways: (i) Dummy arg of procedure - dummy associates with
12586 actual length; (ii) To declare a named constant; or (iii) External
12587 function - but length must be declared in calling scoping unit. */
12588 if (sym
->attr
.function
12589 && sym
->ts
.type
== BT_CHARACTER
&& !sym
->ts
.deferred
12590 && sym
->ts
.u
.cl
&& sym
->ts
.u
.cl
->length
== NULL
)
12592 if ((sym
->as
&& sym
->as
->rank
) || (sym
->attr
.pointer
)
12593 || (sym
->attr
.recursive
) || (sym
->attr
.pure
))
12595 if (sym
->as
&& sym
->as
->rank
)
12596 gfc_error ("CHARACTER(*) function %qs at %L cannot be "
12597 "array-valued", sym
->name
, &sym
->declared_at
);
12599 if (sym
->attr
.pointer
)
12600 gfc_error ("CHARACTER(*) function %qs at %L cannot be "
12601 "pointer-valued", sym
->name
, &sym
->declared_at
);
12603 if (sym
->attr
.pure
)
12604 gfc_error ("CHARACTER(*) function %qs at %L cannot be "
12605 "pure", sym
->name
, &sym
->declared_at
);
12607 if (sym
->attr
.recursive
)
12608 gfc_error ("CHARACTER(*) function %qs at %L cannot be "
12609 "recursive", sym
->name
, &sym
->declared_at
);
12614 /* Appendix B.2 of the standard. Contained functions give an
12615 error anyway. Deferred character length is an F2003 feature.
12616 Don't warn on intrinsic conversion functions, which start
12617 with two underscores. */
12618 if (!sym
->attr
.contained
&& !sym
->ts
.deferred
12619 && (sym
->name
[0] != '_' || sym
->name
[1] != '_'))
12620 gfc_notify_std (GFC_STD_F95_OBS
,
12621 "CHARACTER(*) function %qs at %L",
12622 sym
->name
, &sym
->declared_at
);
12625 /* F2008, C1218. */
12626 if (sym
->attr
.elemental
)
12628 if (sym
->attr
.proc_pointer
)
12630 gfc_error ("Procedure pointer %qs at %L shall not be elemental",
12631 sym
->name
, &sym
->declared_at
);
12634 if (sym
->attr
.dummy
)
12636 gfc_error ("Dummy procedure %qs at %L shall not be elemental",
12637 sym
->name
, &sym
->declared_at
);
12642 /* F2018, C15100: "The result of an elemental function shall be scalar,
12643 and shall not have the POINTER or ALLOCATABLE attribute." The scalar
12644 pointer is tested and caught elsewhere. */
12645 if (sym
->attr
.elemental
&& sym
->result
12646 && (sym
->result
->attr
.allocatable
|| sym
->result
->attr
.pointer
))
12648 gfc_error ("Function result variable %qs at %L of elemental "
12649 "function %qs shall not have an ALLOCATABLE or POINTER "
12650 "attribute", sym
->result
->name
,
12651 &sym
->result
->declared_at
, sym
->name
);
12655 if (sym
->attr
.is_bind_c
&& sym
->attr
.is_c_interop
!= 1)
12657 gfc_formal_arglist
*curr_arg
;
12658 int has_non_interop_arg
= 0;
12660 if (!verify_bind_c_sym (sym
, &(sym
->ts
), sym
->attr
.in_common
,
12661 sym
->common_block
))
12663 /* Clear these to prevent looking at them again if there was an
12665 sym
->attr
.is_bind_c
= 0;
12666 sym
->attr
.is_c_interop
= 0;
12667 sym
->ts
.is_c_interop
= 0;
12671 /* So far, no errors have been found. */
12672 sym
->attr
.is_c_interop
= 1;
12673 sym
->ts
.is_c_interop
= 1;
12676 curr_arg
= gfc_sym_get_dummy_args (sym
);
12677 while (curr_arg
!= NULL
)
12679 /* Skip implicitly typed dummy args here. */
12680 if (curr_arg
->sym
&& curr_arg
->sym
->attr
.implicit_type
== 0)
12681 if (!gfc_verify_c_interop_param (curr_arg
->sym
))
12682 /* If something is found to fail, record the fact so we
12683 can mark the symbol for the procedure as not being
12684 BIND(C) to try and prevent multiple errors being
12686 has_non_interop_arg
= 1;
12688 curr_arg
= curr_arg
->next
;
12691 /* See if any of the arguments were not interoperable and if so, clear
12692 the procedure symbol to prevent duplicate error messages. */
12693 if (has_non_interop_arg
!= 0)
12695 sym
->attr
.is_c_interop
= 0;
12696 sym
->ts
.is_c_interop
= 0;
12697 sym
->attr
.is_bind_c
= 0;
12701 if (!sym
->attr
.proc_pointer
)
12703 if (sym
->attr
.save
== SAVE_EXPLICIT
)
12705 gfc_error ("PROCEDURE attribute conflicts with SAVE attribute "
12706 "in %qs at %L", sym
->name
, &sym
->declared_at
);
12709 if (sym
->attr
.intent
)
12711 gfc_error ("PROCEDURE attribute conflicts with INTENT attribute "
12712 "in %qs at %L", sym
->name
, &sym
->declared_at
);
12715 if (sym
->attr
.subroutine
&& sym
->attr
.result
)
12717 gfc_error ("PROCEDURE attribute conflicts with RESULT attribute "
12718 "in %qs at %L", sym
->name
, &sym
->declared_at
);
12721 if (sym
->attr
.external
&& sym
->attr
.function
&& !sym
->attr
.module_procedure
12722 && ((sym
->attr
.if_source
== IFSRC_DECL
&& !sym
->attr
.procedure
)
12723 || sym
->attr
.contained
))
12725 gfc_error ("EXTERNAL attribute conflicts with FUNCTION attribute "
12726 "in %qs at %L", sym
->name
, &sym
->declared_at
);
12729 if (strcmp ("ppr@", sym
->name
) == 0)
12731 gfc_error ("Procedure pointer result %qs at %L "
12732 "is missing the pointer attribute",
12733 sym
->ns
->proc_name
->name
, &sym
->declared_at
);
12738 /* Assume that a procedure whose body is not known has references
12739 to external arrays. */
12740 if (sym
->attr
.if_source
!= IFSRC_DECL
)
12741 sym
->attr
.array_outer_dependency
= 1;
12743 /* Compare the characteristics of a module procedure with the
12744 interface declaration. Ideally this would be done with
12745 gfc_compare_interfaces but, at present, the formal interface
12746 cannot be copied to the ts.interface. */
12747 if (sym
->attr
.module_procedure
12748 && sym
->attr
.if_source
== IFSRC_DECL
)
12751 char name
[2*GFC_MAX_SYMBOL_LEN
+ 1];
12753 char *submodule_name
;
12754 strcpy (name
, sym
->ns
->proc_name
->name
);
12755 module_name
= strtok (name
, ".");
12756 submodule_name
= strtok (NULL
, ".");
12758 iface
= sym
->tlink
;
12761 /* Make sure that the result uses the correct charlen for deferred
12763 if (iface
&& sym
->result
12764 && iface
->ts
.type
== BT_CHARACTER
12765 && iface
->ts
.deferred
)
12766 sym
->result
->ts
.u
.cl
= iface
->ts
.u
.cl
;
12771 /* Check the procedure characteristics. */
12772 if (sym
->attr
.elemental
!= iface
->attr
.elemental
)
12774 gfc_error ("Mismatch in ELEMENTAL attribute between MODULE "
12775 "PROCEDURE at %L and its interface in %s",
12776 &sym
->declared_at
, module_name
);
12780 if (sym
->attr
.pure
!= iface
->attr
.pure
)
12782 gfc_error ("Mismatch in PURE attribute between MODULE "
12783 "PROCEDURE at %L and its interface in %s",
12784 &sym
->declared_at
, module_name
);
12788 if (sym
->attr
.recursive
!= iface
->attr
.recursive
)
12790 gfc_error ("Mismatch in RECURSIVE attribute between MODULE "
12791 "PROCEDURE at %L and its interface in %s",
12792 &sym
->declared_at
, module_name
);
12796 /* Check the result characteristics. */
12797 if (!gfc_check_result_characteristics (sym
, iface
, errmsg
, 200))
12799 gfc_error ("%s between the MODULE PROCEDURE declaration "
12800 "in MODULE %qs and the declaration at %L in "
12802 errmsg
, module_name
, &sym
->declared_at
,
12803 submodule_name
? submodule_name
: module_name
);
12808 /* Check the characteristics of the formal arguments. */
12809 if (sym
->formal
&& sym
->formal_ns
)
12811 for (arg
= sym
->formal
; arg
&& arg
->sym
; arg
= arg
->next
)
12814 gfc_traverse_ns (sym
->formal_ns
, compare_fsyms
);
12822 /* Resolve a list of finalizer procedures. That is, after they have hopefully
12823 been defined and we now know their defined arguments, check that they fulfill
12824 the requirements of the standard for procedures used as finalizers. */
12827 gfc_resolve_finalizers (gfc_symbol
* derived
, bool *finalizable
)
12829 gfc_finalizer
* list
;
12830 gfc_finalizer
** prev_link
; /* For removing wrong entries from the list. */
12831 bool result
= true;
12832 bool seen_scalar
= false;
12835 gfc_symbol
*parent
= gfc_get_derived_super_type (derived
);
12838 gfc_resolve_finalizers (parent
, finalizable
);
12840 /* Ensure that derived-type components have a their finalizers resolved. */
12841 bool has_final
= derived
->f2k_derived
&& derived
->f2k_derived
->finalizers
;
12842 for (c
= derived
->components
; c
; c
= c
->next
)
12843 if (c
->ts
.type
== BT_DERIVED
12844 && !c
->attr
.pointer
&& !c
->attr
.proc_pointer
&& !c
->attr
.allocatable
)
12846 bool has_final2
= false;
12847 if (!gfc_resolve_finalizers (c
->ts
.u
.derived
, &has_final2
))
12848 return false; /* Error. */
12849 has_final
= has_final
|| has_final2
;
12851 /* Return early if not finalizable. */
12855 *finalizable
= false;
12859 /* Walk over the list of finalizer-procedures, check them, and if any one
12860 does not fit in with the standard's definition, print an error and remove
12861 it from the list. */
12862 prev_link
= &derived
->f2k_derived
->finalizers
;
12863 for (list
= derived
->f2k_derived
->finalizers
; list
; list
= *prev_link
)
12865 gfc_formal_arglist
*dummy_args
;
12870 /* Skip this finalizer if we already resolved it. */
12871 if (list
->proc_tree
)
12873 if (list
->proc_tree
->n
.sym
->formal
->sym
->as
== NULL
12874 || list
->proc_tree
->n
.sym
->formal
->sym
->as
->rank
== 0)
12875 seen_scalar
= true;
12876 prev_link
= &(list
->next
);
12880 /* Check this exists and is a SUBROUTINE. */
12881 if (!list
->proc_sym
->attr
.subroutine
)
12883 gfc_error ("FINAL procedure %qs at %L is not a SUBROUTINE",
12884 list
->proc_sym
->name
, &list
->where
);
12888 /* We should have exactly one argument. */
12889 dummy_args
= gfc_sym_get_dummy_args (list
->proc_sym
);
12890 if (!dummy_args
|| dummy_args
->next
)
12892 gfc_error ("FINAL procedure at %L must have exactly one argument",
12896 arg
= dummy_args
->sym
;
12898 /* This argument must be of our type. */
12899 if (arg
->ts
.type
!= BT_DERIVED
|| arg
->ts
.u
.derived
!= derived
)
12901 gfc_error ("Argument of FINAL procedure at %L must be of type %qs",
12902 &arg
->declared_at
, derived
->name
);
12906 /* It must neither be a pointer nor allocatable nor optional. */
12907 if (arg
->attr
.pointer
)
12909 gfc_error ("Argument of FINAL procedure at %L must not be a POINTER",
12910 &arg
->declared_at
);
12913 if (arg
->attr
.allocatable
)
12915 gfc_error ("Argument of FINAL procedure at %L must not be"
12916 " ALLOCATABLE", &arg
->declared_at
);
12919 if (arg
->attr
.optional
)
12921 gfc_error ("Argument of FINAL procedure at %L must not be OPTIONAL",
12922 &arg
->declared_at
);
12926 /* It must not be INTENT(OUT). */
12927 if (arg
->attr
.intent
== INTENT_OUT
)
12929 gfc_error ("Argument of FINAL procedure at %L must not be"
12930 " INTENT(OUT)", &arg
->declared_at
);
12934 /* Warn if the procedure is non-scalar and not assumed shape. */
12935 if (warn_surprising
&& arg
->as
&& arg
->as
->rank
!= 0
12936 && arg
->as
->type
!= AS_ASSUMED_SHAPE
)
12937 gfc_warning (OPT_Wsurprising
,
12938 "Non-scalar FINAL procedure at %L should have assumed"
12939 " shape argument", &arg
->declared_at
);
12941 /* Check that it does not match in kind and rank with a FINAL procedure
12942 defined earlier. To really loop over the *earlier* declarations,
12943 we need to walk the tail of the list as new ones were pushed at the
12945 /* TODO: Handle kind parameters once they are implemented. */
12946 my_rank
= (arg
->as
? arg
->as
->rank
: 0);
12947 for (i
= list
->next
; i
; i
= i
->next
)
12949 gfc_formal_arglist
*dummy_args
;
12951 /* Argument list might be empty; that is an error signalled earlier,
12952 but we nevertheless continued resolving. */
12953 dummy_args
= gfc_sym_get_dummy_args (i
->proc_sym
);
12956 gfc_symbol
* i_arg
= dummy_args
->sym
;
12957 const int i_rank
= (i_arg
->as
? i_arg
->as
->rank
: 0);
12958 if (i_rank
== my_rank
)
12960 gfc_error ("FINAL procedure %qs declared at %L has the same"
12961 " rank (%d) as %qs",
12962 list
->proc_sym
->name
, &list
->where
, my_rank
,
12963 i
->proc_sym
->name
);
12969 /* Is this the/a scalar finalizer procedure? */
12971 seen_scalar
= true;
12973 /* Find the symtree for this procedure. */
12974 gcc_assert (!list
->proc_tree
);
12975 list
->proc_tree
= gfc_find_sym_in_symtree (list
->proc_sym
);
12977 prev_link
= &list
->next
;
12980 /* Remove wrong nodes immediately from the list so we don't risk any
12981 troubles in the future when they might fail later expectations. */
12984 *prev_link
= list
->next
;
12985 gfc_free_finalizer (i
);
12989 if (result
== false)
12992 /* Warn if we haven't seen a scalar finalizer procedure (but we know there
12993 were nodes in the list, must have been for arrays. It is surely a good
12994 idea to have a scalar version there if there's something to finalize. */
12995 if (warn_surprising
&& derived
->f2k_derived
->finalizers
&& !seen_scalar
)
12996 gfc_warning (OPT_Wsurprising
,
12997 "Only array FINAL procedures declared for derived type %qs"
12998 " defined at %L, suggest also scalar one",
12999 derived
->name
, &derived
->declared_at
);
13001 vtab
= gfc_find_derived_vtab (derived
);
13002 c
= vtab
->ts
.u
.derived
->components
->next
->next
->next
->next
->next
;
13003 gfc_set_sym_referenced (c
->initializer
->symtree
->n
.sym
);
13006 *finalizable
= true;
13012 /* Check if two GENERIC targets are ambiguous and emit an error is they are. */
13015 check_generic_tbp_ambiguity (gfc_tbp_generic
* t1
, gfc_tbp_generic
* t2
,
13016 const char* generic_name
, locus where
)
13018 gfc_symbol
*sym1
, *sym2
;
13019 const char *pass1
, *pass2
;
13020 gfc_formal_arglist
*dummy_args
;
13022 gcc_assert (t1
->specific
&& t2
->specific
);
13023 gcc_assert (!t1
->specific
->is_generic
);
13024 gcc_assert (!t2
->specific
->is_generic
);
13025 gcc_assert (t1
->is_operator
== t2
->is_operator
);
13027 sym1
= t1
->specific
->u
.specific
->n
.sym
;
13028 sym2
= t2
->specific
->u
.specific
->n
.sym
;
13033 /* Both must be SUBROUTINEs or both must be FUNCTIONs. */
13034 if (sym1
->attr
.subroutine
!= sym2
->attr
.subroutine
13035 || sym1
->attr
.function
!= sym2
->attr
.function
)
13037 gfc_error ("%qs and %qs can't be mixed FUNCTION/SUBROUTINE for"
13038 " GENERIC %qs at %L",
13039 sym1
->name
, sym2
->name
, generic_name
, &where
);
13043 /* Determine PASS arguments. */
13044 if (t1
->specific
->nopass
)
13046 else if (t1
->specific
->pass_arg
)
13047 pass1
= t1
->specific
->pass_arg
;
13050 dummy_args
= gfc_sym_get_dummy_args (t1
->specific
->u
.specific
->n
.sym
);
13052 pass1
= dummy_args
->sym
->name
;
13056 if (t2
->specific
->nopass
)
13058 else if (t2
->specific
->pass_arg
)
13059 pass2
= t2
->specific
->pass_arg
;
13062 dummy_args
= gfc_sym_get_dummy_args (t2
->specific
->u
.specific
->n
.sym
);
13064 pass2
= dummy_args
->sym
->name
;
13069 /* Compare the interfaces. */
13070 if (gfc_compare_interfaces (sym1
, sym2
, sym2
->name
, !t1
->is_operator
, 0,
13071 NULL
, 0, pass1
, pass2
))
13073 gfc_error ("%qs and %qs for GENERIC %qs at %L are ambiguous",
13074 sym1
->name
, sym2
->name
, generic_name
, &where
);
13082 /* Worker function for resolving a generic procedure binding; this is used to
13083 resolve GENERIC as well as user and intrinsic OPERATOR typebound procedures.
13085 The difference between those cases is finding possible inherited bindings
13086 that are overridden, as one has to look for them in tb_sym_root,
13087 tb_uop_root or tb_op, respectively. Thus the caller must already find
13088 the super-type and set p->overridden correctly. */
13091 resolve_tb_generic_targets (gfc_symbol
* super_type
,
13092 gfc_typebound_proc
* p
, const char* name
)
13094 gfc_tbp_generic
* target
;
13095 gfc_symtree
* first_target
;
13096 gfc_symtree
* inherited
;
13098 gcc_assert (p
&& p
->is_generic
);
13100 /* Try to find the specific bindings for the symtrees in our target-list. */
13101 gcc_assert (p
->u
.generic
);
13102 for (target
= p
->u
.generic
; target
; target
= target
->next
)
13103 if (!target
->specific
)
13105 gfc_typebound_proc
* overridden_tbp
;
13106 gfc_tbp_generic
* g
;
13107 const char* target_name
;
13109 target_name
= target
->specific_st
->name
;
13111 /* Defined for this type directly. */
13112 if (target
->specific_st
->n
.tb
&& !target
->specific_st
->n
.tb
->error
)
13114 target
->specific
= target
->specific_st
->n
.tb
;
13115 goto specific_found
;
13118 /* Look for an inherited specific binding. */
13121 inherited
= gfc_find_typebound_proc (super_type
, NULL
, target_name
,
13126 gcc_assert (inherited
->n
.tb
);
13127 target
->specific
= inherited
->n
.tb
;
13128 goto specific_found
;
13132 gfc_error ("Undefined specific binding %qs as target of GENERIC %qs"
13133 " at %L", target_name
, name
, &p
->where
);
13136 /* Once we've found the specific binding, check it is not ambiguous with
13137 other specifics already found or inherited for the same GENERIC. */
13139 gcc_assert (target
->specific
);
13141 /* This must really be a specific binding! */
13142 if (target
->specific
->is_generic
)
13144 gfc_error ("GENERIC %qs at %L must target a specific binding,"
13145 " %qs is GENERIC, too", name
, &p
->where
, target_name
);
13149 /* Check those already resolved on this type directly. */
13150 for (g
= p
->u
.generic
; g
; g
= g
->next
)
13151 if (g
!= target
&& g
->specific
13152 && !check_generic_tbp_ambiguity (target
, g
, name
, p
->where
))
13155 /* Check for ambiguity with inherited specific targets. */
13156 for (overridden_tbp
= p
->overridden
; overridden_tbp
;
13157 overridden_tbp
= overridden_tbp
->overridden
)
13158 if (overridden_tbp
->is_generic
)
13160 for (g
= overridden_tbp
->u
.generic
; g
; g
= g
->next
)
13162 gcc_assert (g
->specific
);
13163 if (!check_generic_tbp_ambiguity (target
, g
, name
, p
->where
))
13169 /* If we attempt to "overwrite" a specific binding, this is an error. */
13170 if (p
->overridden
&& !p
->overridden
->is_generic
)
13172 gfc_error ("GENERIC %qs at %L can't overwrite specific binding with"
13173 " the same name", name
, &p
->where
);
13177 /* Take the SUBROUTINE/FUNCTION attributes of the first specific target, as
13178 all must have the same attributes here. */
13179 first_target
= p
->u
.generic
->specific
->u
.specific
;
13180 gcc_assert (first_target
);
13181 p
->subroutine
= first_target
->n
.sym
->attr
.subroutine
;
13182 p
->function
= first_target
->n
.sym
->attr
.function
;
13188 /* Resolve a GENERIC procedure binding for a derived type. */
13191 resolve_typebound_generic (gfc_symbol
* derived
, gfc_symtree
* st
)
13193 gfc_symbol
* super_type
;
13195 /* Find the overridden binding if any. */
13196 st
->n
.tb
->overridden
= NULL
;
13197 super_type
= gfc_get_derived_super_type (derived
);
13200 gfc_symtree
* overridden
;
13201 overridden
= gfc_find_typebound_proc (super_type
, NULL
, st
->name
,
13204 if (overridden
&& overridden
->n
.tb
)
13205 st
->n
.tb
->overridden
= overridden
->n
.tb
;
13208 /* Resolve using worker function. */
13209 return resolve_tb_generic_targets (super_type
, st
->n
.tb
, st
->name
);
13213 /* Retrieve the target-procedure of an operator binding and do some checks in
13214 common for intrinsic and user-defined type-bound operators. */
13217 get_checked_tb_operator_target (gfc_tbp_generic
* target
, locus where
)
13219 gfc_symbol
* target_proc
;
13221 gcc_assert (target
->specific
&& !target
->specific
->is_generic
);
13222 target_proc
= target
->specific
->u
.specific
->n
.sym
;
13223 gcc_assert (target_proc
);
13225 /* F08:C468. All operator bindings must have a passed-object dummy argument. */
13226 if (target
->specific
->nopass
)
13228 gfc_error ("Type-bound operator at %L can't be NOPASS", &where
);
13232 return target_proc
;
13236 /* Resolve a type-bound intrinsic operator. */
13239 resolve_typebound_intrinsic_op (gfc_symbol
* derived
, gfc_intrinsic_op op
,
13240 gfc_typebound_proc
* p
)
13242 gfc_symbol
* super_type
;
13243 gfc_tbp_generic
* target
;
13245 /* If there's already an error here, do nothing (but don't fail again). */
13249 /* Operators should always be GENERIC bindings. */
13250 gcc_assert (p
->is_generic
);
13252 /* Look for an overridden binding. */
13253 super_type
= gfc_get_derived_super_type (derived
);
13254 if (super_type
&& super_type
->f2k_derived
)
13255 p
->overridden
= gfc_find_typebound_intrinsic_op (super_type
, NULL
,
13258 p
->overridden
= NULL
;
13260 /* Resolve general GENERIC properties using worker function. */
13261 if (!resolve_tb_generic_targets (super_type
, p
, gfc_op2string(op
)))
13264 /* Check the targets to be procedures of correct interface. */
13265 for (target
= p
->u
.generic
; target
; target
= target
->next
)
13267 gfc_symbol
* target_proc
;
13269 target_proc
= get_checked_tb_operator_target (target
, p
->where
);
13273 if (!gfc_check_operator_interface (target_proc
, op
, p
->where
))
13276 /* Add target to non-typebound operator list. */
13277 if (!target
->specific
->deferred
&& !derived
->attr
.use_assoc
13278 && p
->access
!= ACCESS_PRIVATE
&& derived
->ns
== gfc_current_ns
)
13280 gfc_interface
*head
, *intr
;
13282 /* Preempt 'gfc_check_new_interface' for submodules, where the
13283 mechanism for handling module procedures winds up resolving
13284 operator interfaces twice and would otherwise cause an error. */
13285 for (intr
= derived
->ns
->op
[op
]; intr
; intr
= intr
->next
)
13286 if (intr
->sym
== target_proc
13287 && target_proc
->attr
.used_in_submodule
)
13290 if (!gfc_check_new_interface (derived
->ns
->op
[op
],
13291 target_proc
, p
->where
))
13293 head
= derived
->ns
->op
[op
];
13294 intr
= gfc_get_interface ();
13295 intr
->sym
= target_proc
;
13296 intr
->where
= p
->where
;
13298 derived
->ns
->op
[op
] = intr
;
13310 /* Resolve a type-bound user operator (tree-walker callback). */
13312 static gfc_symbol
* resolve_bindings_derived
;
13313 static bool resolve_bindings_result
;
13315 static bool check_uop_procedure (gfc_symbol
* sym
, locus where
);
13318 resolve_typebound_user_op (gfc_symtree
* stree
)
13320 gfc_symbol
* super_type
;
13321 gfc_tbp_generic
* target
;
13323 gcc_assert (stree
&& stree
->n
.tb
);
13325 if (stree
->n
.tb
->error
)
13328 /* Operators should always be GENERIC bindings. */
13329 gcc_assert (stree
->n
.tb
->is_generic
);
13331 /* Find overridden procedure, if any. */
13332 super_type
= gfc_get_derived_super_type (resolve_bindings_derived
);
13333 if (super_type
&& super_type
->f2k_derived
)
13335 gfc_symtree
* overridden
;
13336 overridden
= gfc_find_typebound_user_op (super_type
, NULL
,
13337 stree
->name
, true, NULL
);
13339 if (overridden
&& overridden
->n
.tb
)
13340 stree
->n
.tb
->overridden
= overridden
->n
.tb
;
13343 stree
->n
.tb
->overridden
= NULL
;
13345 /* Resolve basically using worker function. */
13346 if (!resolve_tb_generic_targets (super_type
, stree
->n
.tb
, stree
->name
))
13349 /* Check the targets to be functions of correct interface. */
13350 for (target
= stree
->n
.tb
->u
.generic
; target
; target
= target
->next
)
13352 gfc_symbol
* target_proc
;
13354 target_proc
= get_checked_tb_operator_target (target
, stree
->n
.tb
->where
);
13358 if (!check_uop_procedure (target_proc
, stree
->n
.tb
->where
))
13365 resolve_bindings_result
= false;
13366 stree
->n
.tb
->error
= 1;
13370 /* Resolve the type-bound procedures for a derived type. */
13373 resolve_typebound_procedure (gfc_symtree
* stree
)
13377 gfc_symbol
* me_arg
;
13378 gfc_symbol
* super_type
;
13379 gfc_component
* comp
;
13381 gcc_assert (stree
);
13383 /* Undefined specific symbol from GENERIC target definition. */
13387 if (stree
->n
.tb
->error
)
13390 /* If this is a GENERIC binding, use that routine. */
13391 if (stree
->n
.tb
->is_generic
)
13393 if (!resolve_typebound_generic (resolve_bindings_derived
, stree
))
13398 /* Get the target-procedure to check it. */
13399 gcc_assert (!stree
->n
.tb
->is_generic
);
13400 gcc_assert (stree
->n
.tb
->u
.specific
);
13401 proc
= stree
->n
.tb
->u
.specific
->n
.sym
;
13402 where
= stree
->n
.tb
->where
;
13404 /* Default access should already be resolved from the parser. */
13405 gcc_assert (stree
->n
.tb
->access
!= ACCESS_UNKNOWN
);
13407 if (stree
->n
.tb
->deferred
)
13409 if (!check_proc_interface (proc
, &where
))
13414 /* Check for F08:C465. */
13415 if ((!proc
->attr
.subroutine
&& !proc
->attr
.function
)
13416 || (proc
->attr
.proc
!= PROC_MODULE
13417 && proc
->attr
.if_source
!= IFSRC_IFBODY
)
13418 || proc
->attr
.abstract
)
13420 gfc_error ("%qs must be a module procedure or an external procedure with"
13421 " an explicit interface at %L", proc
->name
, &where
);
13426 stree
->n
.tb
->subroutine
= proc
->attr
.subroutine
;
13427 stree
->n
.tb
->function
= proc
->attr
.function
;
13429 /* Find the super-type of the current derived type. We could do this once and
13430 store in a global if speed is needed, but as long as not I believe this is
13431 more readable and clearer. */
13432 super_type
= gfc_get_derived_super_type (resolve_bindings_derived
);
13434 /* If PASS, resolve and check arguments if not already resolved / loaded
13435 from a .mod file. */
13436 if (!stree
->n
.tb
->nopass
&& stree
->n
.tb
->pass_arg_num
== 0)
13438 gfc_formal_arglist
*dummy_args
;
13440 dummy_args
= gfc_sym_get_dummy_args (proc
);
13441 if (stree
->n
.tb
->pass_arg
)
13443 gfc_formal_arglist
*i
;
13445 /* If an explicit passing argument name is given, walk the arg-list
13446 and look for it. */
13449 stree
->n
.tb
->pass_arg_num
= 1;
13450 for (i
= dummy_args
; i
; i
= i
->next
)
13452 if (!strcmp (i
->sym
->name
, stree
->n
.tb
->pass_arg
))
13457 ++stree
->n
.tb
->pass_arg_num
;
13462 gfc_error ("Procedure %qs with PASS(%s) at %L has no"
13464 proc
->name
, stree
->n
.tb
->pass_arg
, &where
,
13465 stree
->n
.tb
->pass_arg
);
13471 /* Otherwise, take the first one; there should in fact be at least
13473 stree
->n
.tb
->pass_arg_num
= 1;
13476 gfc_error ("Procedure %qs with PASS at %L must have at"
13477 " least one argument", proc
->name
, &where
);
13480 me_arg
= dummy_args
->sym
;
13483 /* Now check that the argument-type matches and the passed-object
13484 dummy argument is generally fine. */
13486 gcc_assert (me_arg
);
13488 if (me_arg
->ts
.type
!= BT_CLASS
)
13490 gfc_error ("Non-polymorphic passed-object dummy argument of %qs"
13491 " at %L", proc
->name
, &where
);
13495 if (CLASS_DATA (me_arg
)->ts
.u
.derived
13496 != resolve_bindings_derived
)
13498 gfc_error ("Argument %qs of %qs with PASS(%s) at %L must be of"
13499 " the derived-type %qs", me_arg
->name
, proc
->name
,
13500 me_arg
->name
, &where
, resolve_bindings_derived
->name
);
13504 gcc_assert (me_arg
->ts
.type
== BT_CLASS
);
13505 if (CLASS_DATA (me_arg
)->as
&& CLASS_DATA (me_arg
)->as
->rank
!= 0)
13507 gfc_error ("Passed-object dummy argument of %qs at %L must be"
13508 " scalar", proc
->name
, &where
);
13511 if (CLASS_DATA (me_arg
)->attr
.allocatable
)
13513 gfc_error ("Passed-object dummy argument of %qs at %L must not"
13514 " be ALLOCATABLE", proc
->name
, &where
);
13517 if (CLASS_DATA (me_arg
)->attr
.class_pointer
)
13519 gfc_error ("Passed-object dummy argument of %qs at %L must not"
13520 " be POINTER", proc
->name
, &where
);
13525 /* If we are extending some type, check that we don't override a procedure
13526 flagged NON_OVERRIDABLE. */
13527 stree
->n
.tb
->overridden
= NULL
;
13530 gfc_symtree
* overridden
;
13531 overridden
= gfc_find_typebound_proc (super_type
, NULL
,
13532 stree
->name
, true, NULL
);
13536 if (overridden
->n
.tb
)
13537 stree
->n
.tb
->overridden
= overridden
->n
.tb
;
13539 if (!gfc_check_typebound_override (stree
, overridden
))
13544 /* See if there's a name collision with a component directly in this type. */
13545 for (comp
= resolve_bindings_derived
->components
; comp
; comp
= comp
->next
)
13546 if (!strcmp (comp
->name
, stree
->name
))
13548 gfc_error ("Procedure %qs at %L has the same name as a component of"
13550 stree
->name
, &where
, resolve_bindings_derived
->name
);
13554 /* Try to find a name collision with an inherited component. */
13555 if (super_type
&& gfc_find_component (super_type
, stree
->name
, true, true,
13558 gfc_error ("Procedure %qs at %L has the same name as an inherited"
13559 " component of %qs",
13560 stree
->name
, &where
, resolve_bindings_derived
->name
);
13564 stree
->n
.tb
->error
= 0;
13568 resolve_bindings_result
= false;
13569 stree
->n
.tb
->error
= 1;
13574 resolve_typebound_procedures (gfc_symbol
* derived
)
13577 gfc_symbol
* super_type
;
13579 if (!derived
->f2k_derived
|| !derived
->f2k_derived
->tb_sym_root
)
13582 super_type
= gfc_get_derived_super_type (derived
);
13584 resolve_symbol (super_type
);
13586 resolve_bindings_derived
= derived
;
13587 resolve_bindings_result
= true;
13589 if (derived
->f2k_derived
->tb_sym_root
)
13590 gfc_traverse_symtree (derived
->f2k_derived
->tb_sym_root
,
13591 &resolve_typebound_procedure
);
13593 if (derived
->f2k_derived
->tb_uop_root
)
13594 gfc_traverse_symtree (derived
->f2k_derived
->tb_uop_root
,
13595 &resolve_typebound_user_op
);
13597 for (op
= 0; op
!= GFC_INTRINSIC_OPS
; ++op
)
13599 gfc_typebound_proc
* p
= derived
->f2k_derived
->tb_op
[op
];
13600 if (p
&& !resolve_typebound_intrinsic_op (derived
,
13601 (gfc_intrinsic_op
)op
, p
))
13602 resolve_bindings_result
= false;
13605 return resolve_bindings_result
;
13609 /* Add a derived type to the dt_list. The dt_list is used in trans-types.c
13610 to give all identical derived types the same backend_decl. */
13612 add_dt_to_dt_list (gfc_symbol
*derived
)
13614 if (!derived
->dt_next
)
13616 if (gfc_derived_types
)
13618 derived
->dt_next
= gfc_derived_types
->dt_next
;
13619 gfc_derived_types
->dt_next
= derived
;
13623 derived
->dt_next
= derived
;
13625 gfc_derived_types
= derived
;
13630 /* Ensure that a derived-type is really not abstract, meaning that every
13631 inherited DEFERRED binding is overridden by a non-DEFERRED one. */
13634 ensure_not_abstract_walker (gfc_symbol
* sub
, gfc_symtree
* st
)
13639 if (!ensure_not_abstract_walker (sub
, st
->left
))
13641 if (!ensure_not_abstract_walker (sub
, st
->right
))
13644 if (st
->n
.tb
&& st
->n
.tb
->deferred
)
13646 gfc_symtree
* overriding
;
13647 overriding
= gfc_find_typebound_proc (sub
, NULL
, st
->name
, true, NULL
);
13650 gcc_assert (overriding
->n
.tb
);
13651 if (overriding
->n
.tb
->deferred
)
13653 gfc_error ("Derived-type %qs declared at %L must be ABSTRACT because"
13654 " %qs is DEFERRED and not overridden",
13655 sub
->name
, &sub
->declared_at
, st
->name
);
13664 ensure_not_abstract (gfc_symbol
* sub
, gfc_symbol
* ancestor
)
13666 /* The algorithm used here is to recursively travel up the ancestry of sub
13667 and for each ancestor-type, check all bindings. If any of them is
13668 DEFERRED, look it up starting from sub and see if the found (overriding)
13669 binding is not DEFERRED.
13670 This is not the most efficient way to do this, but it should be ok and is
13671 clearer than something sophisticated. */
13673 gcc_assert (ancestor
&& !sub
->attr
.abstract
);
13675 if (!ancestor
->attr
.abstract
)
13678 /* Walk bindings of this ancestor. */
13679 if (ancestor
->f2k_derived
)
13682 t
= ensure_not_abstract_walker (sub
, ancestor
->f2k_derived
->tb_sym_root
);
13687 /* Find next ancestor type and recurse on it. */
13688 ancestor
= gfc_get_derived_super_type (ancestor
);
13690 return ensure_not_abstract (sub
, ancestor
);
13696 /* This check for typebound defined assignments is done recursively
13697 since the order in which derived types are resolved is not always in
13698 order of the declarations. */
13701 check_defined_assignments (gfc_symbol
*derived
)
13705 for (c
= derived
->components
; c
; c
= c
->next
)
13707 if (!gfc_bt_struct (c
->ts
.type
)
13709 || c
->attr
.allocatable
13710 || c
->attr
.proc_pointer_comp
13711 || c
->attr
.class_pointer
13712 || c
->attr
.proc_pointer
)
13715 if (c
->ts
.u
.derived
->attr
.defined_assign_comp
13716 || (c
->ts
.u
.derived
->f2k_derived
13717 && c
->ts
.u
.derived
->f2k_derived
->tb_op
[INTRINSIC_ASSIGN
]))
13719 derived
->attr
.defined_assign_comp
= 1;
13723 check_defined_assignments (c
->ts
.u
.derived
);
13724 if (c
->ts
.u
.derived
->attr
.defined_assign_comp
)
13726 derived
->attr
.defined_assign_comp
= 1;
13733 /* Resolve a single component of a derived type or structure. */
13736 resolve_component (gfc_component
*c
, gfc_symbol
*sym
)
13738 gfc_symbol
*super_type
;
13740 if (c
->attr
.artificial
)
13743 /* Do not allow vtype components to be resolved in nameless namespaces
13744 such as block data because the procedure pointers will cause ICEs
13745 and vtables are not needed in these contexts. */
13746 if (sym
->attr
.vtype
&& sym
->attr
.use_assoc
13747 && sym
->ns
->proc_name
== NULL
)
13751 if ((!sym
->attr
.is_class
|| c
!= sym
->components
)
13752 && c
->attr
.codimension
13753 && (!c
->attr
.allocatable
|| (c
->as
&& c
->as
->type
!= AS_DEFERRED
)))
13755 gfc_error ("Coarray component %qs at %L must be allocatable with "
13756 "deferred shape", c
->name
, &c
->loc
);
13761 if (c
->attr
.codimension
&& c
->ts
.type
== BT_DERIVED
13762 && c
->ts
.u
.derived
->ts
.is_iso_c
)
13764 gfc_error ("Component %qs at %L of TYPE(C_PTR) or TYPE(C_FUNPTR) "
13765 "shall not be a coarray", c
->name
, &c
->loc
);
13770 if (gfc_bt_struct (c
->ts
.type
) && c
->ts
.u
.derived
->attr
.coarray_comp
13771 && (c
->attr
.codimension
|| c
->attr
.pointer
|| c
->attr
.dimension
13772 || c
->attr
.allocatable
))
13774 gfc_error ("Component %qs at %L with coarray component "
13775 "shall be a nonpointer, nonallocatable scalar",
13781 if (c
->attr
.contiguous
&& (!c
->attr
.dimension
|| !c
->attr
.pointer
))
13783 gfc_error ("Component %qs at %L has the CONTIGUOUS attribute but "
13784 "is not an array pointer", c
->name
, &c
->loc
);
13788 /* F2003, 15.2.1 - length has to be one. */
13789 if (sym
->attr
.is_bind_c
&& c
->ts
.type
== BT_CHARACTER
13790 && (c
->ts
.u
.cl
== NULL
|| c
->ts
.u
.cl
->length
== NULL
13791 || !gfc_is_constant_expr (c
->ts
.u
.cl
->length
)
13792 || mpz_cmp_si (c
->ts
.u
.cl
->length
->value
.integer
, 1) != 0))
13794 gfc_error ("Component %qs of BIND(C) type at %L must have length one",
13799 if (c
->attr
.proc_pointer
&& c
->ts
.interface
)
13801 gfc_symbol
*ifc
= c
->ts
.interface
;
13803 if (!sym
->attr
.vtype
&& !check_proc_interface (ifc
, &c
->loc
))
13809 if (ifc
->attr
.if_source
|| ifc
->attr
.intrinsic
)
13811 /* Resolve interface and copy attributes. */
13812 if (ifc
->formal
&& !ifc
->formal_ns
)
13813 resolve_symbol (ifc
);
13814 if (ifc
->attr
.intrinsic
)
13815 gfc_resolve_intrinsic (ifc
, &ifc
->declared_at
);
13819 c
->ts
= ifc
->result
->ts
;
13820 c
->attr
.allocatable
= ifc
->result
->attr
.allocatable
;
13821 c
->attr
.pointer
= ifc
->result
->attr
.pointer
;
13822 c
->attr
.dimension
= ifc
->result
->attr
.dimension
;
13823 c
->as
= gfc_copy_array_spec (ifc
->result
->as
);
13824 c
->attr
.class_ok
= ifc
->result
->attr
.class_ok
;
13829 c
->attr
.allocatable
= ifc
->attr
.allocatable
;
13830 c
->attr
.pointer
= ifc
->attr
.pointer
;
13831 c
->attr
.dimension
= ifc
->attr
.dimension
;
13832 c
->as
= gfc_copy_array_spec (ifc
->as
);
13833 c
->attr
.class_ok
= ifc
->attr
.class_ok
;
13835 c
->ts
.interface
= ifc
;
13836 c
->attr
.function
= ifc
->attr
.function
;
13837 c
->attr
.subroutine
= ifc
->attr
.subroutine
;
13839 c
->attr
.pure
= ifc
->attr
.pure
;
13840 c
->attr
.elemental
= ifc
->attr
.elemental
;
13841 c
->attr
.recursive
= ifc
->attr
.recursive
;
13842 c
->attr
.always_explicit
= ifc
->attr
.always_explicit
;
13843 c
->attr
.ext_attr
|= ifc
->attr
.ext_attr
;
13844 /* Copy char length. */
13845 if (ifc
->ts
.type
== BT_CHARACTER
&& ifc
->ts
.u
.cl
)
13847 gfc_charlen
*cl
= gfc_new_charlen (sym
->ns
, ifc
->ts
.u
.cl
);
13848 if (cl
->length
&& !cl
->resolved
13849 && !gfc_resolve_expr (cl
->length
))
13858 else if (c
->attr
.proc_pointer
&& c
->ts
.type
== BT_UNKNOWN
)
13860 /* Since PPCs are not implicitly typed, a PPC without an explicit
13861 interface must be a subroutine. */
13862 gfc_add_subroutine (&c
->attr
, c
->name
, &c
->loc
);
13865 /* Procedure pointer components: Check PASS arg. */
13866 if (c
->attr
.proc_pointer
&& !c
->tb
->nopass
&& c
->tb
->pass_arg_num
== 0
13867 && !sym
->attr
.vtype
)
13869 gfc_symbol
* me_arg
;
13871 if (c
->tb
->pass_arg
)
13873 gfc_formal_arglist
* i
;
13875 /* If an explicit passing argument name is given, walk the arg-list
13876 and look for it. */
13879 c
->tb
->pass_arg_num
= 1;
13880 for (i
= c
->ts
.interface
->formal
; i
; i
= i
->next
)
13882 if (!strcmp (i
->sym
->name
, c
->tb
->pass_arg
))
13887 c
->tb
->pass_arg_num
++;
13892 gfc_error ("Procedure pointer component %qs with PASS(%s) "
13893 "at %L has no argument %qs", c
->name
,
13894 c
->tb
->pass_arg
, &c
->loc
, c
->tb
->pass_arg
);
13901 /* Otherwise, take the first one; there should in fact be at least
13903 c
->tb
->pass_arg_num
= 1;
13904 if (!c
->ts
.interface
->formal
)
13906 gfc_error ("Procedure pointer component %qs with PASS at %L "
13907 "must have at least one argument",
13912 me_arg
= c
->ts
.interface
->formal
->sym
;
13915 /* Now check that the argument-type matches. */
13916 gcc_assert (me_arg
);
13917 if ((me_arg
->ts
.type
!= BT_DERIVED
&& me_arg
->ts
.type
!= BT_CLASS
)
13918 || (me_arg
->ts
.type
== BT_DERIVED
&& me_arg
->ts
.u
.derived
!= sym
)
13919 || (me_arg
->ts
.type
== BT_CLASS
13920 && CLASS_DATA (me_arg
)->ts
.u
.derived
!= sym
))
13922 gfc_error ("Argument %qs of %qs with PASS(%s) at %L must be of"
13923 " the derived type %qs", me_arg
->name
, c
->name
,
13924 me_arg
->name
, &c
->loc
, sym
->name
);
13929 /* Check for F03:C453. */
13930 if (CLASS_DATA (me_arg
)->attr
.dimension
)
13932 gfc_error ("Argument %qs of %qs with PASS(%s) at %L "
13933 "must be scalar", me_arg
->name
, c
->name
, me_arg
->name
,
13939 if (CLASS_DATA (me_arg
)->attr
.class_pointer
)
13941 gfc_error ("Argument %qs of %qs with PASS(%s) at %L "
13942 "may not have the POINTER attribute", me_arg
->name
,
13943 c
->name
, me_arg
->name
, &c
->loc
);
13948 if (CLASS_DATA (me_arg
)->attr
.allocatable
)
13950 gfc_error ("Argument %qs of %qs with PASS(%s) at %L "
13951 "may not be ALLOCATABLE", me_arg
->name
, c
->name
,
13952 me_arg
->name
, &c
->loc
);
13957 if (gfc_type_is_extensible (sym
) && me_arg
->ts
.type
!= BT_CLASS
)
13959 gfc_error ("Non-polymorphic passed-object dummy argument of %qs"
13960 " at %L", c
->name
, &c
->loc
);
13966 /* Check type-spec if this is not the parent-type component. */
13967 if (((sym
->attr
.is_class
13968 && (!sym
->components
->ts
.u
.derived
->attr
.extension
13969 || c
!= sym
->components
->ts
.u
.derived
->components
))
13970 || (!sym
->attr
.is_class
13971 && (!sym
->attr
.extension
|| c
!= sym
->components
)))
13972 && !sym
->attr
.vtype
13973 && !resolve_typespec_used (&c
->ts
, &c
->loc
, c
->name
))
13976 super_type
= gfc_get_derived_super_type (sym
);
13978 /* If this type is an extension, set the accessibility of the parent
13981 && ((sym
->attr
.is_class
13982 && c
== sym
->components
->ts
.u
.derived
->components
)
13983 || (!sym
->attr
.is_class
&& c
== sym
->components
))
13984 && strcmp (super_type
->name
, c
->name
) == 0)
13985 c
->attr
.access
= super_type
->attr
.access
;
13987 /* If this type is an extension, see if this component has the same name
13988 as an inherited type-bound procedure. */
13989 if (super_type
&& !sym
->attr
.is_class
13990 && gfc_find_typebound_proc (super_type
, NULL
, c
->name
, true, NULL
))
13992 gfc_error ("Component %qs of %qs at %L has the same name as an"
13993 " inherited type-bound procedure",
13994 c
->name
, sym
->name
, &c
->loc
);
13998 if (c
->ts
.type
== BT_CHARACTER
&& !c
->attr
.proc_pointer
13999 && !c
->ts
.deferred
)
14001 if (c
->ts
.u
.cl
->length
== NULL
14002 || (!resolve_charlen(c
->ts
.u
.cl
))
14003 || !gfc_is_constant_expr (c
->ts
.u
.cl
->length
))
14005 gfc_error ("Character length of component %qs needs to "
14006 "be a constant specification expression at %L",
14008 c
->ts
.u
.cl
->length
? &c
->ts
.u
.cl
->length
->where
: &c
->loc
);
14013 if (c
->ts
.type
== BT_CHARACTER
&& c
->ts
.deferred
14014 && !c
->attr
.pointer
&& !c
->attr
.allocatable
)
14016 gfc_error ("Character component %qs of %qs at %L with deferred "
14017 "length must be a POINTER or ALLOCATABLE",
14018 c
->name
, sym
->name
, &c
->loc
);
14022 /* Add the hidden deferred length field. */
14023 if (c
->ts
.type
== BT_CHARACTER
14024 && (c
->ts
.deferred
|| c
->attr
.pdt_string
)
14025 && !c
->attr
.function
14026 && !sym
->attr
.is_class
)
14028 char name
[GFC_MAX_SYMBOL_LEN
+9];
14029 gfc_component
*strlen
;
14030 sprintf (name
, "_%s_length", c
->name
);
14031 strlen
= gfc_find_component (sym
, name
, true, true, NULL
);
14032 if (strlen
== NULL
)
14034 if (!gfc_add_component (sym
, name
, &strlen
))
14036 strlen
->ts
.type
= BT_INTEGER
;
14037 strlen
->ts
.kind
= gfc_charlen_int_kind
;
14038 strlen
->attr
.access
= ACCESS_PRIVATE
;
14039 strlen
->attr
.artificial
= 1;
14043 if (c
->ts
.type
== BT_DERIVED
14044 && sym
->component_access
!= ACCESS_PRIVATE
14045 && gfc_check_symbol_access (sym
)
14046 && !is_sym_host_assoc (c
->ts
.u
.derived
, sym
->ns
)
14047 && !c
->ts
.u
.derived
->attr
.use_assoc
14048 && !gfc_check_symbol_access (c
->ts
.u
.derived
)
14049 && !gfc_notify_std (GFC_STD_F2003
, "the component %qs is a "
14050 "PRIVATE type and cannot be a component of "
14051 "%qs, which is PUBLIC at %L", c
->name
,
14052 sym
->name
, &sym
->declared_at
))
14055 if ((sym
->attr
.sequence
|| sym
->attr
.is_bind_c
) && c
->ts
.type
== BT_CLASS
)
14057 gfc_error ("Polymorphic component %s at %L in SEQUENCE or BIND(C) "
14058 "type %s", c
->name
, &c
->loc
, sym
->name
);
14062 if (sym
->attr
.sequence
)
14064 if (c
->ts
.type
== BT_DERIVED
&& c
->ts
.u
.derived
->attr
.sequence
== 0)
14066 gfc_error ("Component %s of SEQUENCE type declared at %L does "
14067 "not have the SEQUENCE attribute",
14068 c
->ts
.u
.derived
->name
, &sym
->declared_at
);
14073 if (c
->ts
.type
== BT_DERIVED
&& c
->ts
.u
.derived
->attr
.generic
)
14074 c
->ts
.u
.derived
= gfc_find_dt_in_generic (c
->ts
.u
.derived
);
14075 else if (c
->ts
.type
== BT_CLASS
&& c
->attr
.class_ok
14076 && CLASS_DATA (c
)->ts
.u
.derived
->attr
.generic
)
14077 CLASS_DATA (c
)->ts
.u
.derived
14078 = gfc_find_dt_in_generic (CLASS_DATA (c
)->ts
.u
.derived
);
14080 /* If an allocatable component derived type is of the same type as
14081 the enclosing derived type, we need a vtable generating so that
14082 the __deallocate procedure is created. */
14083 if ((c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
14084 && c
->ts
.u
.derived
== sym
&& c
->attr
.allocatable
== 1)
14085 gfc_find_vtab (&c
->ts
);
14087 /* Ensure that all the derived type components are put on the
14088 derived type list; even in formal namespaces, where derived type
14089 pointer components might not have been declared. */
14090 if (c
->ts
.type
== BT_DERIVED
14092 && c
->ts
.u
.derived
->components
14094 && sym
!= c
->ts
.u
.derived
)
14095 add_dt_to_dt_list (c
->ts
.u
.derived
);
14097 if (!gfc_resolve_array_spec (c
->as
,
14098 !(c
->attr
.pointer
|| c
->attr
.proc_pointer
14099 || c
->attr
.allocatable
)))
14102 if (c
->initializer
&& !sym
->attr
.vtype
14103 && !c
->attr
.pdt_kind
&& !c
->attr
.pdt_len
14104 && !gfc_check_assign_symbol (sym
, c
, c
->initializer
))
14111 /* Be nice about the locus for a structure expression - show the locus of the
14112 first non-null sub-expression if we can. */
14115 cons_where (gfc_expr
*struct_expr
)
14117 gfc_constructor
*cons
;
14119 gcc_assert (struct_expr
&& struct_expr
->expr_type
== EXPR_STRUCTURE
);
14121 cons
= gfc_constructor_first (struct_expr
->value
.constructor
);
14122 for (; cons
; cons
= gfc_constructor_next (cons
))
14124 if (cons
->expr
&& cons
->expr
->expr_type
!= EXPR_NULL
)
14125 return &cons
->expr
->where
;
14128 return &struct_expr
->where
;
14131 /* Resolve the components of a structure type. Much less work than derived
14135 resolve_fl_struct (gfc_symbol
*sym
)
14138 gfc_expr
*init
= NULL
;
14141 /* Make sure UNIONs do not have overlapping initializers. */
14142 if (sym
->attr
.flavor
== FL_UNION
)
14144 for (c
= sym
->components
; c
; c
= c
->next
)
14146 if (init
&& c
->initializer
)
14148 gfc_error ("Conflicting initializers in union at %L and %L",
14149 cons_where (init
), cons_where (c
->initializer
));
14150 gfc_free_expr (c
->initializer
);
14151 c
->initializer
= NULL
;
14154 init
= c
->initializer
;
14159 for (c
= sym
->components
; c
; c
= c
->next
)
14160 if (!resolve_component (c
, sym
))
14166 if (sym
->components
)
14167 add_dt_to_dt_list (sym
);
14173 /* Resolve the components of a derived type. This does not have to wait until
14174 resolution stage, but can be done as soon as the dt declaration has been
14178 resolve_fl_derived0 (gfc_symbol
*sym
)
14180 gfc_symbol
* super_type
;
14182 gfc_formal_arglist
*f
;
14185 if (sym
->attr
.unlimited_polymorphic
)
14188 super_type
= gfc_get_derived_super_type (sym
);
14191 if (super_type
&& sym
->attr
.coarray_comp
&& !super_type
->attr
.coarray_comp
)
14193 gfc_error ("As extending type %qs at %L has a coarray component, "
14194 "parent type %qs shall also have one", sym
->name
,
14195 &sym
->declared_at
, super_type
->name
);
14199 /* Ensure the extended type gets resolved before we do. */
14200 if (super_type
&& !resolve_fl_derived0 (super_type
))
14203 /* An ABSTRACT type must be extensible. */
14204 if (sym
->attr
.abstract
&& !gfc_type_is_extensible (sym
))
14206 gfc_error ("Non-extensible derived-type %qs at %L must not be ABSTRACT",
14207 sym
->name
, &sym
->declared_at
);
14211 c
= (sym
->attr
.is_class
) ? sym
->components
->ts
.u
.derived
->components
14215 for ( ; c
!= NULL
; c
= c
->next
)
14216 if (!resolve_component (c
, sym
))
14222 /* Now add the caf token field, where needed. */
14223 if (flag_coarray
!= GFC_FCOARRAY_NONE
14224 && !sym
->attr
.is_class
&& !sym
->attr
.vtype
)
14226 for (c
= sym
->components
; c
; c
= c
->next
)
14227 if (!c
->attr
.dimension
&& !c
->attr
.codimension
14228 && (c
->attr
.allocatable
|| c
->attr
.pointer
))
14230 char name
[GFC_MAX_SYMBOL_LEN
+9];
14231 gfc_component
*token
;
14232 sprintf (name
, "_caf_%s", c
->name
);
14233 token
= gfc_find_component (sym
, name
, true, true, NULL
);
14236 if (!gfc_add_component (sym
, name
, &token
))
14238 token
->ts
.type
= BT_VOID
;
14239 token
->ts
.kind
= gfc_default_integer_kind
;
14240 token
->attr
.access
= ACCESS_PRIVATE
;
14241 token
->attr
.artificial
= 1;
14242 token
->attr
.caf_token
= 1;
14247 check_defined_assignments (sym
);
14249 if (!sym
->attr
.defined_assign_comp
&& super_type
)
14250 sym
->attr
.defined_assign_comp
14251 = super_type
->attr
.defined_assign_comp
;
14253 /* If this is a non-ABSTRACT type extending an ABSTRACT one, ensure that
14254 all DEFERRED bindings are overridden. */
14255 if (super_type
&& super_type
->attr
.abstract
&& !sym
->attr
.abstract
14256 && !sym
->attr
.is_class
14257 && !ensure_not_abstract (sym
, super_type
))
14260 /* Check that there is a component for every PDT parameter. */
14261 if (sym
->attr
.pdt_template
)
14263 for (f
= sym
->formal
; f
; f
= f
->next
)
14267 c
= gfc_find_component (sym
, f
->sym
->name
, true, true, NULL
);
14270 gfc_error ("Parameterized type %qs does not have a component "
14271 "corresponding to parameter %qs at %L", sym
->name
,
14272 f
->sym
->name
, &sym
->declared_at
);
14278 /* Add derived type to the derived type list. */
14279 add_dt_to_dt_list (sym
);
14285 /* The following procedure does the full resolution of a derived type,
14286 including resolution of all type-bound procedures (if present). In contrast
14287 to 'resolve_fl_derived0' this can only be done after the module has been
14288 parsed completely. */
14291 resolve_fl_derived (gfc_symbol
*sym
)
14293 gfc_symbol
*gen_dt
= NULL
;
14295 if (sym
->attr
.unlimited_polymorphic
)
14298 if (!sym
->attr
.is_class
)
14299 gfc_find_symbol (sym
->name
, sym
->ns
, 0, &gen_dt
);
14300 if (gen_dt
&& gen_dt
->generic
&& gen_dt
->generic
->next
14301 && (!gen_dt
->generic
->sym
->attr
.use_assoc
14302 || gen_dt
->generic
->sym
->module
!= gen_dt
->generic
->next
->sym
->module
)
14303 && !gfc_notify_std (GFC_STD_F2003
, "Generic name %qs of function "
14304 "%qs at %L being the same name as derived "
14305 "type at %L", sym
->name
,
14306 gen_dt
->generic
->sym
== sym
14307 ? gen_dt
->generic
->next
->sym
->name
14308 : gen_dt
->generic
->sym
->name
,
14309 gen_dt
->generic
->sym
== sym
14310 ? &gen_dt
->generic
->next
->sym
->declared_at
14311 : &gen_dt
->generic
->sym
->declared_at
,
14312 &sym
->declared_at
))
14315 if (sym
->components
== NULL
&& !sym
->attr
.zero_comp
&& !sym
->attr
.use_assoc
)
14317 gfc_error ("Derived type %qs at %L has not been declared",
14318 sym
->name
, &sym
->declared_at
);
14322 /* Resolve the finalizer procedures. */
14323 if (!gfc_resolve_finalizers (sym
, NULL
))
14326 if (sym
->attr
.is_class
&& sym
->ts
.u
.derived
== NULL
)
14328 /* Fix up incomplete CLASS symbols. */
14329 gfc_component
*data
= gfc_find_component (sym
, "_data", true, true, NULL
);
14330 gfc_component
*vptr
= gfc_find_component (sym
, "_vptr", true, true, NULL
);
14332 /* Nothing more to do for unlimited polymorphic entities. */
14333 if (data
->ts
.u
.derived
->attr
.unlimited_polymorphic
)
14335 else if (vptr
->ts
.u
.derived
== NULL
)
14337 gfc_symbol
*vtab
= gfc_find_derived_vtab (data
->ts
.u
.derived
);
14339 vptr
->ts
.u
.derived
= vtab
->ts
.u
.derived
;
14340 if (!resolve_fl_derived0 (vptr
->ts
.u
.derived
))
14345 if (!resolve_fl_derived0 (sym
))
14348 /* Resolve the type-bound procedures. */
14349 if (!resolve_typebound_procedures (sym
))
14352 /* Generate module vtables subject to their accessibility and their not
14353 being vtables or pdt templates. If this is not done class declarations
14354 in external procedures wind up with their own version and so SELECT TYPE
14355 fails because the vptrs do not have the same address. */
14356 if (gfc_option
.allow_std
& GFC_STD_F2003
14357 && sym
->ns
->proc_name
14358 && sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
14359 && sym
->attr
.access
!= ACCESS_PRIVATE
14360 && !(sym
->attr
.use_assoc
|| sym
->attr
.vtype
|| sym
->attr
.pdt_template
))
14362 gfc_symbol
*vtab
= gfc_find_derived_vtab (sym
);
14363 gfc_set_sym_referenced (vtab
);
14371 resolve_fl_namelist (gfc_symbol
*sym
)
14376 for (nl
= sym
->namelist
; nl
; nl
= nl
->next
)
14378 /* Check again, the check in match only works if NAMELIST comes
14380 if (nl
->sym
->as
&& nl
->sym
->as
->type
== AS_ASSUMED_SIZE
)
14382 gfc_error ("Assumed size array %qs in namelist %qs at %L is not "
14383 "allowed", nl
->sym
->name
, sym
->name
, &sym
->declared_at
);
14387 if (nl
->sym
->as
&& nl
->sym
->as
->type
== AS_ASSUMED_SHAPE
14388 && !gfc_notify_std (GFC_STD_F2003
, "NAMELIST array object %qs "
14389 "with assumed shape in namelist %qs at %L",
14390 nl
->sym
->name
, sym
->name
, &sym
->declared_at
))
14393 if (is_non_constant_shape_array (nl
->sym
)
14394 && !gfc_notify_std (GFC_STD_F2003
, "NAMELIST array object %qs "
14395 "with nonconstant shape in namelist %qs at %L",
14396 nl
->sym
->name
, sym
->name
, &sym
->declared_at
))
14399 if (nl
->sym
->ts
.type
== BT_CHARACTER
14400 && (nl
->sym
->ts
.u
.cl
->length
== NULL
14401 || !gfc_is_constant_expr (nl
->sym
->ts
.u
.cl
->length
))
14402 && !gfc_notify_std (GFC_STD_F2003
, "NAMELIST object %qs with "
14403 "nonconstant character length in "
14404 "namelist %qs at %L", nl
->sym
->name
,
14405 sym
->name
, &sym
->declared_at
))
14410 /* Reject PRIVATE objects in a PUBLIC namelist. */
14411 if (gfc_check_symbol_access (sym
))
14413 for (nl
= sym
->namelist
; nl
; nl
= nl
->next
)
14415 if (!nl
->sym
->attr
.use_assoc
14416 && !is_sym_host_assoc (nl
->sym
, sym
->ns
)
14417 && !gfc_check_symbol_access (nl
->sym
))
14419 gfc_error ("NAMELIST object %qs was declared PRIVATE and "
14420 "cannot be member of PUBLIC namelist %qs at %L",
14421 nl
->sym
->name
, sym
->name
, &sym
->declared_at
);
14425 if (nl
->sym
->ts
.type
== BT_DERIVED
14426 && (nl
->sym
->ts
.u
.derived
->attr
.alloc_comp
14427 || nl
->sym
->ts
.u
.derived
->attr
.pointer_comp
))
14429 if (!gfc_notify_std (GFC_STD_F2003
, "NAMELIST object %qs in "
14430 "namelist %qs at %L with ALLOCATABLE "
14431 "or POINTER components", nl
->sym
->name
,
14432 sym
->name
, &sym
->declared_at
))
14437 /* Types with private components that came here by USE-association. */
14438 if (nl
->sym
->ts
.type
== BT_DERIVED
14439 && derived_inaccessible (nl
->sym
->ts
.u
.derived
))
14441 gfc_error ("NAMELIST object %qs has use-associated PRIVATE "
14442 "components and cannot be member of namelist %qs at %L",
14443 nl
->sym
->name
, sym
->name
, &sym
->declared_at
);
14447 /* Types with private components that are defined in the same module. */
14448 if (nl
->sym
->ts
.type
== BT_DERIVED
14449 && !is_sym_host_assoc (nl
->sym
->ts
.u
.derived
, sym
->ns
)
14450 && nl
->sym
->ts
.u
.derived
->attr
.private_comp
)
14452 gfc_error ("NAMELIST object %qs has PRIVATE components and "
14453 "cannot be a member of PUBLIC namelist %qs at %L",
14454 nl
->sym
->name
, sym
->name
, &sym
->declared_at
);
14461 /* 14.1.2 A module or internal procedure represent local entities
14462 of the same type as a namelist member and so are not allowed. */
14463 for (nl
= sym
->namelist
; nl
; nl
= nl
->next
)
14465 if (nl
->sym
->ts
.kind
!= 0 && nl
->sym
->attr
.flavor
== FL_VARIABLE
)
14468 if (nl
->sym
->attr
.function
&& nl
->sym
== nl
->sym
->result
)
14469 if ((nl
->sym
== sym
->ns
->proc_name
)
14471 (sym
->ns
->parent
&& nl
->sym
== sym
->ns
->parent
->proc_name
))
14476 gfc_find_symbol (nl
->sym
->name
, sym
->ns
, 1, &nlsym
);
14477 if (nlsym
&& nlsym
->attr
.flavor
== FL_PROCEDURE
)
14479 gfc_error ("PROCEDURE attribute conflicts with NAMELIST "
14480 "attribute in %qs at %L", nlsym
->name
,
14481 &sym
->declared_at
);
14488 for (nl
= sym
->namelist
; nl
; nl
= nl
->next
)
14489 nl
->sym
->attr
.asynchronous
= 1;
14496 resolve_fl_parameter (gfc_symbol
*sym
)
14498 /* A parameter array's shape needs to be constant. */
14499 if (sym
->as
!= NULL
14500 && (sym
->as
->type
== AS_DEFERRED
14501 || is_non_constant_shape_array (sym
)))
14503 gfc_error ("Parameter array %qs at %L cannot be automatic "
14504 "or of deferred shape", sym
->name
, &sym
->declared_at
);
14508 /* Constraints on deferred type parameter. */
14509 if (!deferred_requirements (sym
))
14512 /* Make sure a parameter that has been implicitly typed still
14513 matches the implicit type, since PARAMETER statements can precede
14514 IMPLICIT statements. */
14515 if (sym
->attr
.implicit_type
14516 && !gfc_compare_types (&sym
->ts
, gfc_get_default_type (sym
->name
,
14519 gfc_error ("Implicitly typed PARAMETER %qs at %L doesn't match a "
14520 "later IMPLICIT type", sym
->name
, &sym
->declared_at
);
14524 /* Make sure the types of derived parameters are consistent. This
14525 type checking is deferred until resolution because the type may
14526 refer to a derived type from the host. */
14527 if (sym
->ts
.type
== BT_DERIVED
14528 && !gfc_compare_types (&sym
->ts
, &sym
->value
->ts
))
14530 gfc_error ("Incompatible derived type in PARAMETER at %L",
14531 &sym
->value
->where
);
14535 /* F03:C509,C514. */
14536 if (sym
->ts
.type
== BT_CLASS
)
14538 gfc_error ("CLASS variable %qs at %L cannot have the PARAMETER attribute",
14539 sym
->name
, &sym
->declared_at
);
14547 /* Called by resolve_symbol to check PDTs. */
14550 resolve_pdt (gfc_symbol
* sym
)
14552 gfc_symbol
*derived
= NULL
;
14553 gfc_actual_arglist
*param
;
14555 bool const_len_exprs
= true;
14556 bool assumed_len_exprs
= false;
14557 symbol_attribute
*attr
;
14559 if (sym
->ts
.type
== BT_DERIVED
)
14561 derived
= sym
->ts
.u
.derived
;
14562 attr
= &(sym
->attr
);
14564 else if (sym
->ts
.type
== BT_CLASS
)
14566 derived
= CLASS_DATA (sym
)->ts
.u
.derived
;
14567 attr
= &(CLASS_DATA (sym
)->attr
);
14570 gcc_unreachable ();
14572 gcc_assert (derived
->attr
.pdt_type
);
14574 for (param
= sym
->param_list
; param
; param
= param
->next
)
14576 c
= gfc_find_component (derived
, param
->name
, false, true, NULL
);
14578 if (c
->attr
.pdt_kind
)
14581 if (param
->expr
&& !gfc_is_constant_expr (param
->expr
)
14582 && c
->attr
.pdt_len
)
14583 const_len_exprs
= false;
14584 else if (param
->spec_type
== SPEC_ASSUMED
)
14585 assumed_len_exprs
= true;
14587 if (param
->spec_type
== SPEC_DEFERRED
14588 && !attr
->allocatable
&& !attr
->pointer
)
14589 gfc_error ("The object %qs at %L has a deferred LEN "
14590 "parameter %qs and is neither allocatable "
14591 "nor a pointer", sym
->name
, &sym
->declared_at
,
14596 if (!const_len_exprs
14597 && (sym
->ns
->proc_name
->attr
.is_main_program
14598 || sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
14599 || sym
->attr
.save
!= SAVE_NONE
))
14600 gfc_error ("The AUTOMATIC object %qs at %L must not have the "
14601 "SAVE attribute or be a variable declared in the "
14602 "main program, a module or a submodule(F08/C513)",
14603 sym
->name
, &sym
->declared_at
);
14605 if (assumed_len_exprs
&& !(sym
->attr
.dummy
14606 || sym
->attr
.select_type_temporary
|| sym
->attr
.associate_var
))
14607 gfc_error ("The object %qs at %L with ASSUMED type parameters "
14608 "must be a dummy or a SELECT TYPE selector(F08/4.2)",
14609 sym
->name
, &sym
->declared_at
);
14613 /* Do anything necessary to resolve a symbol. Right now, we just
14614 assume that an otherwise unknown symbol is a variable. This sort
14615 of thing commonly happens for symbols in module. */
14618 resolve_symbol (gfc_symbol
*sym
)
14620 int check_constant
, mp_flag
;
14621 gfc_symtree
*symtree
;
14622 gfc_symtree
*this_symtree
;
14625 symbol_attribute class_attr
;
14626 gfc_array_spec
*as
;
14627 bool saved_specification_expr
;
14633 /* No symbol will ever have union type; only components can be unions.
14634 Union type declaration symbols have type BT_UNKNOWN but flavor FL_UNION
14635 (just like derived type declaration symbols have flavor FL_DERIVED). */
14636 gcc_assert (sym
->ts
.type
!= BT_UNION
);
14638 /* Coarrayed polymorphic objects with allocatable or pointer components are
14639 yet unsupported for -fcoarray=lib. */
14640 if (flag_coarray
== GFC_FCOARRAY_LIB
&& sym
->ts
.type
== BT_CLASS
14641 && sym
->ts
.u
.derived
&& CLASS_DATA (sym
)
14642 && CLASS_DATA (sym
)->attr
.codimension
14643 && (CLASS_DATA (sym
)->ts
.u
.derived
->attr
.alloc_comp
14644 || CLASS_DATA (sym
)->ts
.u
.derived
->attr
.pointer_comp
))
14646 gfc_error ("Sorry, allocatable/pointer components in polymorphic (CLASS) "
14647 "type coarrays at %L are unsupported", &sym
->declared_at
);
14651 if (sym
->attr
.artificial
)
14654 if (sym
->attr
.unlimited_polymorphic
)
14657 if (sym
->attr
.flavor
== FL_UNKNOWN
14658 || (sym
->attr
.flavor
== FL_PROCEDURE
&& !sym
->attr
.intrinsic
14659 && !sym
->attr
.generic
&& !sym
->attr
.external
14660 && sym
->attr
.if_source
== IFSRC_UNKNOWN
14661 && sym
->ts
.type
== BT_UNKNOWN
))
14664 /* If we find that a flavorless symbol is an interface in one of the
14665 parent namespaces, find its symtree in this namespace, free the
14666 symbol and set the symtree to point to the interface symbol. */
14667 for (ns
= gfc_current_ns
->parent
; ns
; ns
= ns
->parent
)
14669 symtree
= gfc_find_symtree (ns
->sym_root
, sym
->name
);
14670 if (symtree
&& (symtree
->n
.sym
->generic
||
14671 (symtree
->n
.sym
->attr
.flavor
== FL_PROCEDURE
14672 && sym
->ns
->construct_entities
)))
14674 this_symtree
= gfc_find_symtree (gfc_current_ns
->sym_root
,
14676 if (this_symtree
->n
.sym
== sym
)
14678 symtree
->n
.sym
->refs
++;
14679 gfc_release_symbol (sym
);
14680 this_symtree
->n
.sym
= symtree
->n
.sym
;
14686 /* Otherwise give it a flavor according to such attributes as
14688 if (sym
->attr
.flavor
== FL_UNKNOWN
&& sym
->attr
.external
== 0
14689 && sym
->attr
.intrinsic
== 0)
14690 sym
->attr
.flavor
= FL_VARIABLE
;
14691 else if (sym
->attr
.flavor
== FL_UNKNOWN
)
14693 sym
->attr
.flavor
= FL_PROCEDURE
;
14694 if (sym
->attr
.dimension
)
14695 sym
->attr
.function
= 1;
14699 if (sym
->attr
.external
&& sym
->ts
.type
!= BT_UNKNOWN
&& !sym
->attr
.function
)
14700 gfc_add_function (&sym
->attr
, sym
->name
, &sym
->declared_at
);
14702 if (sym
->attr
.procedure
&& sym
->attr
.if_source
!= IFSRC_DECL
14703 && !resolve_procedure_interface (sym
))
14706 if (sym
->attr
.is_protected
&& !sym
->attr
.proc_pointer
14707 && (sym
->attr
.procedure
|| sym
->attr
.external
))
14709 if (sym
->attr
.external
)
14710 gfc_error ("PROTECTED attribute conflicts with EXTERNAL attribute "
14711 "at %L", &sym
->declared_at
);
14713 gfc_error ("PROCEDURE attribute conflicts with PROTECTED attribute "
14714 "at %L", &sym
->declared_at
);
14719 if (sym
->attr
.flavor
== FL_DERIVED
&& !resolve_fl_derived (sym
))
14722 else if ((sym
->attr
.flavor
== FL_STRUCT
|| sym
->attr
.flavor
== FL_UNION
)
14723 && !resolve_fl_struct (sym
))
14726 /* Symbols that are module procedures with results (functions) have
14727 the types and array specification copied for type checking in
14728 procedures that call them, as well as for saving to a module
14729 file. These symbols can't stand the scrutiny that their results
14731 mp_flag
= (sym
->result
!= NULL
&& sym
->result
!= sym
);
14733 /* Make sure that the intrinsic is consistent with its internal
14734 representation. This needs to be done before assigning a default
14735 type to avoid spurious warnings. */
14736 if (sym
->attr
.flavor
!= FL_MODULE
&& sym
->attr
.intrinsic
14737 && !gfc_resolve_intrinsic (sym
, &sym
->declared_at
))
14740 /* Resolve associate names. */
14742 resolve_assoc_var (sym
, true);
14744 /* Assign default type to symbols that need one and don't have one. */
14745 if (sym
->ts
.type
== BT_UNKNOWN
)
14747 if (sym
->attr
.flavor
== FL_VARIABLE
|| sym
->attr
.flavor
== FL_PARAMETER
)
14749 gfc_set_default_type (sym
, 1, NULL
);
14752 if (sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.external
14753 && !sym
->attr
.function
&& !sym
->attr
.subroutine
14754 && gfc_get_default_type (sym
->name
, sym
->ns
)->type
== BT_UNKNOWN
)
14755 gfc_add_subroutine (&sym
->attr
, sym
->name
, &sym
->declared_at
);
14757 if (sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.function
)
14759 /* The specific case of an external procedure should emit an error
14760 in the case that there is no implicit type. */
14763 if (!sym
->attr
.mixed_entry_master
)
14764 gfc_set_default_type (sym
, sym
->attr
.external
, NULL
);
14768 /* Result may be in another namespace. */
14769 resolve_symbol (sym
->result
);
14771 if (!sym
->result
->attr
.proc_pointer
)
14773 sym
->ts
= sym
->result
->ts
;
14774 sym
->as
= gfc_copy_array_spec (sym
->result
->as
);
14775 sym
->attr
.dimension
= sym
->result
->attr
.dimension
;
14776 sym
->attr
.pointer
= sym
->result
->attr
.pointer
;
14777 sym
->attr
.allocatable
= sym
->result
->attr
.allocatable
;
14778 sym
->attr
.contiguous
= sym
->result
->attr
.contiguous
;
14783 else if (mp_flag
&& sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.function
)
14785 bool saved_specification_expr
= specification_expr
;
14786 specification_expr
= true;
14787 gfc_resolve_array_spec (sym
->result
->as
, false);
14788 specification_expr
= saved_specification_expr
;
14791 if (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
)
14793 as
= CLASS_DATA (sym
)->as
;
14794 class_attr
= CLASS_DATA (sym
)->attr
;
14795 class_attr
.pointer
= class_attr
.class_pointer
;
14799 class_attr
= sym
->attr
;
14804 if (sym
->attr
.contiguous
14805 && (!class_attr
.dimension
14806 || (as
->type
!= AS_ASSUMED_SHAPE
&& as
->type
!= AS_ASSUMED_RANK
14807 && !class_attr
.pointer
)))
14809 gfc_error ("%qs at %L has the CONTIGUOUS attribute but is not an "
14810 "array pointer or an assumed-shape or assumed-rank array",
14811 sym
->name
, &sym
->declared_at
);
14815 /* Assumed size arrays and assumed shape arrays must be dummy
14816 arguments. Array-spec's of implied-shape should have been resolved to
14817 AS_EXPLICIT already. */
14821 /* If AS_IMPLIED_SHAPE makes it to here, it must be a bad
14822 specification expression. */
14823 if (as
->type
== AS_IMPLIED_SHAPE
)
14826 for (i
=0; i
<as
->rank
; i
++)
14828 if (as
->lower
[i
] != NULL
&& as
->upper
[i
] == NULL
)
14830 gfc_error ("Bad specification for assumed size array at %L",
14831 &as
->lower
[i
]->where
);
14838 if (((as
->type
== AS_ASSUMED_SIZE
&& !as
->cp_was_assumed
)
14839 || as
->type
== AS_ASSUMED_SHAPE
)
14840 && !sym
->attr
.dummy
&& !sym
->attr
.select_type_temporary
)
14842 if (as
->type
== AS_ASSUMED_SIZE
)
14843 gfc_error ("Assumed size array at %L must be a dummy argument",
14844 &sym
->declared_at
);
14846 gfc_error ("Assumed shape array at %L must be a dummy argument",
14847 &sym
->declared_at
);
14850 /* TS 29113, C535a. */
14851 if (as
->type
== AS_ASSUMED_RANK
&& !sym
->attr
.dummy
14852 && !sym
->attr
.select_type_temporary
)
14854 gfc_error ("Assumed-rank array at %L must be a dummy argument",
14855 &sym
->declared_at
);
14858 if (as
->type
== AS_ASSUMED_RANK
14859 && (sym
->attr
.codimension
|| sym
->attr
.value
))
14861 gfc_error ("Assumed-rank array at %L may not have the VALUE or "
14862 "CODIMENSION attribute", &sym
->declared_at
);
14867 /* Make sure symbols with known intent or optional are really dummy
14868 variable. Because of ENTRY statement, this has to be deferred
14869 until resolution time. */
14871 if (!sym
->attr
.dummy
14872 && (sym
->attr
.optional
|| sym
->attr
.intent
!= INTENT_UNKNOWN
))
14874 gfc_error ("Symbol at %L is not a DUMMY variable", &sym
->declared_at
);
14878 if (sym
->attr
.value
&& !sym
->attr
.dummy
)
14880 gfc_error ("%qs at %L cannot have the VALUE attribute because "
14881 "it is not a dummy argument", sym
->name
, &sym
->declared_at
);
14885 if (sym
->attr
.value
&& sym
->ts
.type
== BT_CHARACTER
)
14887 gfc_charlen
*cl
= sym
->ts
.u
.cl
;
14888 if (!cl
|| !cl
->length
|| cl
->length
->expr_type
!= EXPR_CONSTANT
)
14890 gfc_error ("Character dummy variable %qs at %L with VALUE "
14891 "attribute must have constant length",
14892 sym
->name
, &sym
->declared_at
);
14896 if (sym
->ts
.is_c_interop
14897 && mpz_cmp_si (cl
->length
->value
.integer
, 1) != 0)
14899 gfc_error ("C interoperable character dummy variable %qs at %L "
14900 "with VALUE attribute must have length one",
14901 sym
->name
, &sym
->declared_at
);
14906 if (sym
->ts
.type
== BT_DERIVED
&& !sym
->attr
.is_iso_c
14907 && sym
->ts
.u
.derived
->attr
.generic
)
14909 sym
->ts
.u
.derived
= gfc_find_dt_in_generic (sym
->ts
.u
.derived
);
14910 if (!sym
->ts
.u
.derived
)
14912 gfc_error ("The derived type %qs at %L is of type %qs, "
14913 "which has not been defined", sym
->name
,
14914 &sym
->declared_at
, sym
->ts
.u
.derived
->name
);
14915 sym
->ts
.type
= BT_UNKNOWN
;
14920 /* Use the same constraints as TYPE(*), except for the type check
14921 and that only scalars and assumed-size arrays are permitted. */
14922 if (sym
->attr
.ext_attr
& (1 << EXT_ATTR_NO_ARG_CHECK
))
14924 if (!sym
->attr
.dummy
)
14926 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute shall be "
14927 "a dummy argument", sym
->name
, &sym
->declared_at
);
14931 if (sym
->ts
.type
!= BT_ASSUMED
&& sym
->ts
.type
!= BT_INTEGER
14932 && sym
->ts
.type
!= BT_REAL
&& sym
->ts
.type
!= BT_LOGICAL
14933 && sym
->ts
.type
!= BT_COMPLEX
)
14935 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute shall be "
14936 "of type TYPE(*) or of an numeric intrinsic type",
14937 sym
->name
, &sym
->declared_at
);
14941 if (sym
->attr
.allocatable
|| sym
->attr
.codimension
14942 || sym
->attr
.pointer
|| sym
->attr
.value
)
14944 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute may not "
14945 "have the ALLOCATABLE, CODIMENSION, POINTER or VALUE "
14946 "attribute", sym
->name
, &sym
->declared_at
);
14950 if (sym
->attr
.intent
== INTENT_OUT
)
14952 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute may not "
14953 "have the INTENT(OUT) attribute",
14954 sym
->name
, &sym
->declared_at
);
14957 if (sym
->attr
.dimension
&& sym
->as
->type
!= AS_ASSUMED_SIZE
)
14959 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute shall "
14960 "either be a scalar or an assumed-size array",
14961 sym
->name
, &sym
->declared_at
);
14965 /* Set the type to TYPE(*) and add a dimension(*) to ensure
14966 NO_ARG_CHECK is correctly handled in trans*.c, e.g. with
14968 sym
->ts
.type
= BT_ASSUMED
;
14969 sym
->as
= gfc_get_array_spec ();
14970 sym
->as
->type
= AS_ASSUMED_SIZE
;
14972 sym
->as
->lower
[0] = gfc_get_int_expr (gfc_default_integer_kind
, NULL
, 1);
14974 else if (sym
->ts
.type
== BT_ASSUMED
)
14976 /* TS 29113, C407a. */
14977 if (!sym
->attr
.dummy
)
14979 gfc_error ("Assumed type of variable %s at %L is only permitted "
14980 "for dummy variables", sym
->name
, &sym
->declared_at
);
14983 if (sym
->attr
.allocatable
|| sym
->attr
.codimension
14984 || sym
->attr
.pointer
|| sym
->attr
.value
)
14986 gfc_error ("Assumed-type variable %s at %L may not have the "
14987 "ALLOCATABLE, CODIMENSION, POINTER or VALUE attribute",
14988 sym
->name
, &sym
->declared_at
);
14991 if (sym
->attr
.intent
== INTENT_OUT
)
14993 gfc_error ("Assumed-type variable %s at %L may not have the "
14994 "INTENT(OUT) attribute",
14995 sym
->name
, &sym
->declared_at
);
14998 if (sym
->attr
.dimension
&& sym
->as
->type
== AS_EXPLICIT
)
15000 gfc_error ("Assumed-type variable %s at %L shall not be an "
15001 "explicit-shape array", sym
->name
, &sym
->declared_at
);
15006 /* If the symbol is marked as bind(c), that it is declared at module level
15007 scope and verify its type and kind. Do not do the latter for symbols
15008 that are implicitly typed because that is handled in
15009 gfc_set_default_type. Handle dummy arguments and procedure definitions
15010 separately. Also, anything that is use associated is not handled here
15011 but instead is handled in the module it is declared in. Finally, derived
15012 type definitions are allowed to be BIND(C) since that only implies that
15013 they're interoperable, and they are checked fully for interoperability
15014 when a variable is declared of that type. */
15015 if (sym
->attr
.is_bind_c
&& sym
->attr
.use_assoc
== 0
15016 && sym
->attr
.dummy
== 0 && sym
->attr
.flavor
!= FL_PROCEDURE
15017 && sym
->attr
.flavor
!= FL_DERIVED
)
15021 /* First, make sure the variable is declared at the
15022 module-level scope (J3/04-007, Section 15.3). */
15023 if (sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
&&
15024 sym
->attr
.in_common
== 0)
15026 gfc_error ("Variable %qs at %L cannot be BIND(C) because it "
15027 "is neither a COMMON block nor declared at the "
15028 "module level scope", sym
->name
, &(sym
->declared_at
));
15031 else if (sym
->ts
.type
== BT_CHARACTER
15032 && (sym
->ts
.u
.cl
== NULL
|| sym
->ts
.u
.cl
->length
== NULL
15033 || !gfc_is_constant_expr (sym
->ts
.u
.cl
->length
)
15034 || mpz_cmp_si (sym
->ts
.u
.cl
->length
->value
.integer
, 1) != 0))
15036 gfc_error ("BIND(C) Variable %qs at %L must have length one",
15037 sym
->name
, &sym
->declared_at
);
15040 else if (sym
->common_head
!= NULL
&& sym
->attr
.implicit_type
== 0)
15042 t
= verify_com_block_vars_c_interop (sym
->common_head
);
15044 else if (sym
->attr
.implicit_type
== 0)
15046 /* If type() declaration, we need to verify that the components
15047 of the given type are all C interoperable, etc. */
15048 if (sym
->ts
.type
== BT_DERIVED
&&
15049 sym
->ts
.u
.derived
->attr
.is_c_interop
!= 1)
15051 /* Make sure the user marked the derived type as BIND(C). If
15052 not, call the verify routine. This could print an error
15053 for the derived type more than once if multiple variables
15054 of that type are declared. */
15055 if (sym
->ts
.u
.derived
->attr
.is_bind_c
!= 1)
15056 verify_bind_c_derived_type (sym
->ts
.u
.derived
);
15060 /* Verify the variable itself as C interoperable if it
15061 is BIND(C). It is not possible for this to succeed if
15062 the verify_bind_c_derived_type failed, so don't have to handle
15063 any error returned by verify_bind_c_derived_type. */
15064 t
= verify_bind_c_sym (sym
, &(sym
->ts
), sym
->attr
.in_common
,
15065 sym
->common_block
);
15070 /* clear the is_bind_c flag to prevent reporting errors more than
15071 once if something failed. */
15072 sym
->attr
.is_bind_c
= 0;
15077 /* If a derived type symbol has reached this point, without its
15078 type being declared, we have an error. Notice that most
15079 conditions that produce undefined derived types have already
15080 been dealt with. However, the likes of:
15081 implicit type(t) (t) ..... call foo (t) will get us here if
15082 the type is not declared in the scope of the implicit
15083 statement. Change the type to BT_UNKNOWN, both because it is so
15084 and to prevent an ICE. */
15085 if (sym
->ts
.type
== BT_DERIVED
&& !sym
->attr
.is_iso_c
15086 && sym
->ts
.u
.derived
->components
== NULL
15087 && !sym
->ts
.u
.derived
->attr
.zero_comp
)
15089 gfc_error ("The derived type %qs at %L is of type %qs, "
15090 "which has not been defined", sym
->name
,
15091 &sym
->declared_at
, sym
->ts
.u
.derived
->name
);
15092 sym
->ts
.type
= BT_UNKNOWN
;
15096 /* Make sure that the derived type has been resolved and that the
15097 derived type is visible in the symbol's namespace, if it is a
15098 module function and is not PRIVATE. */
15099 if (sym
->ts
.type
== BT_DERIVED
15100 && sym
->ts
.u
.derived
->attr
.use_assoc
15101 && sym
->ns
->proc_name
15102 && sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
15103 && !resolve_fl_derived (sym
->ts
.u
.derived
))
15106 /* Unless the derived-type declaration is use associated, Fortran 95
15107 does not allow public entries of private derived types.
15108 See 4.4.1 (F95) and 4.5.1.1 (F2003); and related interpretation
15109 161 in 95-006r3. */
15110 if (sym
->ts
.type
== BT_DERIVED
15111 && sym
->ns
->proc_name
&& sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
15112 && !sym
->ts
.u
.derived
->attr
.use_assoc
15113 && gfc_check_symbol_access (sym
)
15114 && !gfc_check_symbol_access (sym
->ts
.u
.derived
)
15115 && !gfc_notify_std (GFC_STD_F2003
, "PUBLIC %s %qs at %L of PRIVATE "
15116 "derived type %qs",
15117 (sym
->attr
.flavor
== FL_PARAMETER
)
15118 ? "parameter" : "variable",
15119 sym
->name
, &sym
->declared_at
,
15120 sym
->ts
.u
.derived
->name
))
15123 /* F2008, C1302. */
15124 if (sym
->ts
.type
== BT_DERIVED
15125 && ((sym
->ts
.u
.derived
->from_intmod
== INTMOD_ISO_FORTRAN_ENV
15126 && sym
->ts
.u
.derived
->intmod_sym_id
== ISOFORTRAN_LOCK_TYPE
)
15127 || sym
->ts
.u
.derived
->attr
.lock_comp
)
15128 && !sym
->attr
.codimension
&& !sym
->ts
.u
.derived
->attr
.coarray_comp
)
15130 gfc_error ("Variable %s at %L of type LOCK_TYPE or with subcomponent of "
15131 "type LOCK_TYPE must be a coarray", sym
->name
,
15132 &sym
->declared_at
);
15136 /* TS18508, C702/C703. */
15137 if (sym
->ts
.type
== BT_DERIVED
15138 && ((sym
->ts
.u
.derived
->from_intmod
== INTMOD_ISO_FORTRAN_ENV
15139 && sym
->ts
.u
.derived
->intmod_sym_id
== ISOFORTRAN_EVENT_TYPE
)
15140 || sym
->ts
.u
.derived
->attr
.event_comp
)
15141 && !sym
->attr
.codimension
&& !sym
->ts
.u
.derived
->attr
.coarray_comp
)
15143 gfc_error ("Variable %s at %L of type EVENT_TYPE or with subcomponent of "
15144 "type EVENT_TYPE must be a coarray", sym
->name
,
15145 &sym
->declared_at
);
15149 /* An assumed-size array with INTENT(OUT) shall not be of a type for which
15150 default initialization is defined (5.1.2.4.4). */
15151 if (sym
->ts
.type
== BT_DERIVED
15153 && sym
->attr
.intent
== INTENT_OUT
15155 && sym
->as
->type
== AS_ASSUMED_SIZE
)
15157 for (c
= sym
->ts
.u
.derived
->components
; c
; c
= c
->next
)
15159 if (c
->initializer
)
15161 gfc_error ("The INTENT(OUT) dummy argument %qs at %L is "
15162 "ASSUMED SIZE and so cannot have a default initializer",
15163 sym
->name
, &sym
->declared_at
);
15170 if (sym
->ts
.type
== BT_DERIVED
&& sym
->attr
.dummy
15171 && sym
->attr
.intent
== INTENT_OUT
&& sym
->attr
.lock_comp
)
15173 gfc_error ("Dummy argument %qs at %L of LOCK_TYPE shall not be "
15174 "INTENT(OUT)", sym
->name
, &sym
->declared_at
);
15179 if (sym
->ts
.type
== BT_DERIVED
&& sym
->attr
.dummy
15180 && sym
->attr
.intent
== INTENT_OUT
&& sym
->attr
.event_comp
)
15182 gfc_error ("Dummy argument %qs at %L of EVENT_TYPE shall not be "
15183 "INTENT(OUT)", sym
->name
, &sym
->declared_at
);
15188 if ((((sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
->attr
.coarray_comp
)
15189 || (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
15190 && CLASS_DATA (sym
)->attr
.coarray_comp
))
15191 || class_attr
.codimension
)
15192 && (sym
->attr
.result
|| sym
->result
== sym
))
15194 gfc_error ("Function result %qs at %L shall not be a coarray or have "
15195 "a coarray component", sym
->name
, &sym
->declared_at
);
15200 if (sym
->attr
.codimension
&& sym
->ts
.type
== BT_DERIVED
15201 && sym
->ts
.u
.derived
->ts
.is_iso_c
)
15203 gfc_error ("Variable %qs at %L of TYPE(C_PTR) or TYPE(C_FUNPTR) "
15204 "shall not be a coarray", sym
->name
, &sym
->declared_at
);
15209 if (((sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
->attr
.coarray_comp
)
15210 || (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
15211 && CLASS_DATA (sym
)->attr
.coarray_comp
))
15212 && (class_attr
.codimension
|| class_attr
.pointer
|| class_attr
.dimension
15213 || class_attr
.allocatable
))
15215 gfc_error ("Variable %qs at %L with coarray component shall be a "
15216 "nonpointer, nonallocatable scalar, which is not a coarray",
15217 sym
->name
, &sym
->declared_at
);
15221 /* F2008, C526. The function-result case was handled above. */
15222 if (class_attr
.codimension
15223 && !(class_attr
.allocatable
|| sym
->attr
.dummy
|| sym
->attr
.save
15224 || sym
->attr
.select_type_temporary
15225 || sym
->attr
.associate_var
15226 || (sym
->ns
->save_all
&& !sym
->attr
.automatic
)
15227 || sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
15228 || sym
->ns
->proc_name
->attr
.is_main_program
15229 || sym
->attr
.function
|| sym
->attr
.result
|| sym
->attr
.use_assoc
))
15231 gfc_error ("Variable %qs at %L is a coarray and is not ALLOCATABLE, SAVE "
15232 "nor a dummy argument", sym
->name
, &sym
->declared_at
);
15236 else if (class_attr
.codimension
&& !sym
->attr
.select_type_temporary
15237 && !class_attr
.allocatable
&& as
&& as
->cotype
== AS_DEFERRED
)
15239 gfc_error ("Coarray variable %qs at %L shall not have codimensions with "
15240 "deferred shape", sym
->name
, &sym
->declared_at
);
15243 else if (class_attr
.codimension
&& class_attr
.allocatable
&& as
15244 && (as
->cotype
!= AS_DEFERRED
|| as
->type
!= AS_DEFERRED
))
15246 gfc_error ("Allocatable coarray variable %qs at %L must have "
15247 "deferred shape", sym
->name
, &sym
->declared_at
);
15252 if ((((sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
->attr
.coarray_comp
)
15253 || (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
15254 && CLASS_DATA (sym
)->attr
.coarray_comp
))
15255 || (class_attr
.codimension
&& class_attr
.allocatable
))
15256 && sym
->attr
.dummy
&& sym
->attr
.intent
== INTENT_OUT
)
15258 gfc_error ("Variable %qs at %L is INTENT(OUT) and can thus not be an "
15259 "allocatable coarray or have coarray components",
15260 sym
->name
, &sym
->declared_at
);
15264 if (class_attr
.codimension
&& sym
->attr
.dummy
15265 && sym
->ns
->proc_name
&& sym
->ns
->proc_name
->attr
.is_bind_c
)
15267 gfc_error ("Coarray dummy variable %qs at %L not allowed in BIND(C) "
15268 "procedure %qs", sym
->name
, &sym
->declared_at
,
15269 sym
->ns
->proc_name
->name
);
15273 if (sym
->ts
.type
== BT_LOGICAL
15274 && ((sym
->attr
.function
&& sym
->attr
.is_bind_c
&& sym
->result
== sym
)
15275 || ((sym
->attr
.dummy
|| sym
->attr
.result
) && sym
->ns
->proc_name
15276 && sym
->ns
->proc_name
->attr
.is_bind_c
)))
15279 for (i
= 0; gfc_logical_kinds
[i
].kind
; i
++)
15280 if (gfc_logical_kinds
[i
].kind
== sym
->ts
.kind
)
15282 if (!gfc_logical_kinds
[i
].c_bool
&& sym
->attr
.dummy
15283 && !gfc_notify_std (GFC_STD_GNU
, "LOGICAL dummy argument %qs at "
15284 "%L with non-C_Bool kind in BIND(C) procedure "
15285 "%qs", sym
->name
, &sym
->declared_at
,
15286 sym
->ns
->proc_name
->name
))
15288 else if (!gfc_logical_kinds
[i
].c_bool
15289 && !gfc_notify_std (GFC_STD_GNU
, "LOGICAL result variable "
15290 "%qs at %L with non-C_Bool kind in "
15291 "BIND(C) procedure %qs", sym
->name
,
15293 sym
->attr
.function
? sym
->name
15294 : sym
->ns
->proc_name
->name
))
15298 switch (sym
->attr
.flavor
)
15301 if (!resolve_fl_variable (sym
, mp_flag
))
15306 if (sym
->formal
&& !sym
->formal_ns
)
15308 /* Check that none of the arguments are a namelist. */
15309 gfc_formal_arglist
*formal
= sym
->formal
;
15311 for (; formal
; formal
= formal
->next
)
15312 if (formal
->sym
&& formal
->sym
->attr
.flavor
== FL_NAMELIST
)
15314 gfc_error ("Namelist %qs cannot be an argument to "
15315 "subroutine or function at %L",
15316 formal
->sym
->name
, &sym
->declared_at
);
15321 if (!resolve_fl_procedure (sym
, mp_flag
))
15326 if (!resolve_fl_namelist (sym
))
15331 if (!resolve_fl_parameter (sym
))
15339 /* Resolve array specifier. Check as well some constraints
15340 on COMMON blocks. */
15342 check_constant
= sym
->attr
.in_common
&& !sym
->attr
.pointer
;
15344 /* Set the formal_arg_flag so that check_conflict will not throw
15345 an error for host associated variables in the specification
15346 expression for an array_valued function. */
15347 if (sym
->attr
.function
&& sym
->as
)
15348 formal_arg_flag
= true;
15350 saved_specification_expr
= specification_expr
;
15351 specification_expr
= true;
15352 gfc_resolve_array_spec (sym
->as
, check_constant
);
15353 specification_expr
= saved_specification_expr
;
15355 formal_arg_flag
= false;
15357 /* Resolve formal namespaces. */
15358 if (sym
->formal_ns
&& sym
->formal_ns
!= gfc_current_ns
15359 && !sym
->attr
.contained
&& !sym
->attr
.intrinsic
)
15360 gfc_resolve (sym
->formal_ns
);
15362 /* Make sure the formal namespace is present. */
15363 if (sym
->formal
&& !sym
->formal_ns
)
15365 gfc_formal_arglist
*formal
= sym
->formal
;
15366 while (formal
&& !formal
->sym
)
15367 formal
= formal
->next
;
15371 sym
->formal_ns
= formal
->sym
->ns
;
15372 if (sym
->ns
!= formal
->sym
->ns
)
15373 sym
->formal_ns
->refs
++;
15377 /* Check threadprivate restrictions. */
15378 if (sym
->attr
.threadprivate
&& !sym
->attr
.save
15379 && !(sym
->ns
->save_all
&& !sym
->attr
.automatic
)
15380 && (!sym
->attr
.in_common
15381 && sym
->module
== NULL
15382 && (sym
->ns
->proc_name
== NULL
15383 || sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
)))
15384 gfc_error ("Threadprivate at %L isn't SAVEd", &sym
->declared_at
);
15386 /* Check omp declare target restrictions. */
15387 if (sym
->attr
.omp_declare_target
15388 && sym
->attr
.flavor
== FL_VARIABLE
15390 && !(sym
->ns
->save_all
&& !sym
->attr
.automatic
)
15391 && (!sym
->attr
.in_common
15392 && sym
->module
== NULL
15393 && (sym
->ns
->proc_name
== NULL
15394 || sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
)))
15395 gfc_error ("!$OMP DECLARE TARGET variable %qs at %L isn't SAVEd",
15396 sym
->name
, &sym
->declared_at
);
15398 /* If we have come this far we can apply default-initializers, as
15399 described in 14.7.5, to those variables that have not already
15400 been assigned one. */
15401 if (sym
->ts
.type
== BT_DERIVED
15403 && !sym
->attr
.allocatable
15404 && !sym
->attr
.alloc_comp
)
15406 symbol_attribute
*a
= &sym
->attr
;
15408 if ((!a
->save
&& !a
->dummy
&& !a
->pointer
15409 && !a
->in_common
&& !a
->use_assoc
15411 && !((a
->function
|| a
->result
)
15413 || sym
->ts
.u
.derived
->attr
.alloc_comp
15414 || sym
->ts
.u
.derived
->attr
.pointer_comp
))
15415 && !(a
->function
&& sym
!= sym
->result
))
15416 || (a
->dummy
&& a
->intent
== INTENT_OUT
&& !a
->pointer
))
15417 apply_default_init (sym
);
15418 else if (a
->function
&& sym
->result
&& a
->access
!= ACCESS_PRIVATE
15419 && (sym
->ts
.u
.derived
->attr
.alloc_comp
15420 || sym
->ts
.u
.derived
->attr
.pointer_comp
))
15421 /* Mark the result symbol to be referenced, when it has allocatable
15423 sym
->result
->attr
.referenced
= 1;
15426 if (sym
->ts
.type
== BT_CLASS
&& sym
->ns
== gfc_current_ns
15427 && sym
->attr
.dummy
&& sym
->attr
.intent
== INTENT_OUT
15428 && !CLASS_DATA (sym
)->attr
.class_pointer
15429 && !CLASS_DATA (sym
)->attr
.allocatable
)
15430 apply_default_init (sym
);
15432 /* If this symbol has a type-spec, check it. */
15433 if (sym
->attr
.flavor
== FL_VARIABLE
|| sym
->attr
.flavor
== FL_PARAMETER
15434 || (sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.function
))
15435 if (!resolve_typespec_used (&sym
->ts
, &sym
->declared_at
, sym
->name
))
15438 if (sym
->param_list
)
15443 /************* Resolve DATA statements *************/
15447 gfc_data_value
*vnode
;
15453 /* Advance the values structure to point to the next value in the data list. */
15456 next_data_value (void)
15458 while (mpz_cmp_ui (values
.left
, 0) == 0)
15461 if (values
.vnode
->next
== NULL
)
15464 values
.vnode
= values
.vnode
->next
;
15465 mpz_set (values
.left
, values
.vnode
->repeat
);
15473 check_data_variable (gfc_data_variable
*var
, locus
*where
)
15479 ar_type mark
= AR_UNKNOWN
;
15481 mpz_t section_index
[GFC_MAX_DIMENSIONS
];
15487 if (!gfc_resolve_expr (var
->expr
))
15491 mpz_init_set_si (offset
, 0);
15494 if (e
->expr_type
== EXPR_FUNCTION
&& e
->value
.function
.isym
15495 && e
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
)
15496 e
= e
->value
.function
.actual
->expr
;
15498 if (e
->expr_type
!= EXPR_VARIABLE
)
15500 gfc_error ("Expecting definable entity near %L", where
);
15504 sym
= e
->symtree
->n
.sym
;
15506 if (sym
->ns
->is_block_data
&& !sym
->attr
.in_common
)
15508 gfc_error ("BLOCK DATA element %qs at %L must be in COMMON",
15509 sym
->name
, &sym
->declared_at
);
15513 if (e
->ref
== NULL
&& sym
->as
)
15515 gfc_error ("DATA array %qs at %L must be specified in a previous"
15516 " declaration", sym
->name
, where
);
15520 has_pointer
= sym
->attr
.pointer
;
15522 if (gfc_is_coindexed (e
))
15524 gfc_error ("DATA element %qs at %L cannot have a coindex", sym
->name
,
15529 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
15531 if (ref
->type
== REF_COMPONENT
&& ref
->u
.c
.component
->attr
.pointer
)
15535 && ref
->type
== REF_ARRAY
15536 && ref
->u
.ar
.type
!= AR_FULL
)
15538 gfc_error ("DATA element %qs at %L is a pointer and so must "
15539 "be a full array", sym
->name
, where
);
15544 if (e
->rank
== 0 || has_pointer
)
15546 mpz_init_set_ui (size
, 1);
15553 /* Find the array section reference. */
15554 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
15556 if (ref
->type
!= REF_ARRAY
)
15558 if (ref
->u
.ar
.type
== AR_ELEMENT
)
15564 /* Set marks according to the reference pattern. */
15565 switch (ref
->u
.ar
.type
)
15573 /* Get the start position of array section. */
15574 gfc_get_section_index (ar
, section_index
, &offset
);
15579 gcc_unreachable ();
15582 if (!gfc_array_size (e
, &size
))
15584 gfc_error ("Nonconstant array section at %L in DATA statement",
15586 mpz_clear (offset
);
15593 while (mpz_cmp_ui (size
, 0) > 0)
15595 if (!next_data_value ())
15597 gfc_error ("DATA statement at %L has more variables than values",
15603 t
= gfc_check_assign (var
->expr
, values
.vnode
->expr
, 0);
15607 /* If we have more than one element left in the repeat count,
15608 and we have more than one element left in the target variable,
15609 then create a range assignment. */
15610 /* FIXME: Only done for full arrays for now, since array sections
15612 if (mark
== AR_FULL
&& ref
&& ref
->next
== NULL
15613 && mpz_cmp_ui (values
.left
, 1) > 0 && mpz_cmp_ui (size
, 1) > 0)
15617 if (mpz_cmp (size
, values
.left
) >= 0)
15619 mpz_init_set (range
, values
.left
);
15620 mpz_sub (size
, size
, values
.left
);
15621 mpz_set_ui (values
.left
, 0);
15625 mpz_init_set (range
, size
);
15626 mpz_sub (values
.left
, values
.left
, size
);
15627 mpz_set_ui (size
, 0);
15630 t
= gfc_assign_data_value (var
->expr
, values
.vnode
->expr
,
15633 mpz_add (offset
, offset
, range
);
15640 /* Assign initial value to symbol. */
15643 mpz_sub_ui (values
.left
, values
.left
, 1);
15644 mpz_sub_ui (size
, size
, 1);
15646 t
= gfc_assign_data_value (var
->expr
, values
.vnode
->expr
,
15651 if (mark
== AR_FULL
)
15652 mpz_add_ui (offset
, offset
, 1);
15654 /* Modify the array section indexes and recalculate the offset
15655 for next element. */
15656 else if (mark
== AR_SECTION
)
15657 gfc_advance_section (section_index
, ar
, &offset
);
15661 if (mark
== AR_SECTION
)
15663 for (i
= 0; i
< ar
->dimen
; i
++)
15664 mpz_clear (section_index
[i
]);
15668 mpz_clear (offset
);
15674 static bool traverse_data_var (gfc_data_variable
*, locus
*);
15676 /* Iterate over a list of elements in a DATA statement. */
15679 traverse_data_list (gfc_data_variable
*var
, locus
*where
)
15682 iterator_stack frame
;
15683 gfc_expr
*e
, *start
, *end
, *step
;
15684 bool retval
= true;
15686 mpz_init (frame
.value
);
15689 start
= gfc_copy_expr (var
->iter
.start
);
15690 end
= gfc_copy_expr (var
->iter
.end
);
15691 step
= gfc_copy_expr (var
->iter
.step
);
15693 if (!gfc_simplify_expr (start
, 1)
15694 || start
->expr_type
!= EXPR_CONSTANT
)
15696 gfc_error ("start of implied-do loop at %L could not be "
15697 "simplified to a constant value", &start
->where
);
15701 if (!gfc_simplify_expr (end
, 1)
15702 || end
->expr_type
!= EXPR_CONSTANT
)
15704 gfc_error ("end of implied-do loop at %L could not be "
15705 "simplified to a constant value", &start
->where
);
15709 if (!gfc_simplify_expr (step
, 1)
15710 || step
->expr_type
!= EXPR_CONSTANT
)
15712 gfc_error ("step of implied-do loop at %L could not be "
15713 "simplified to a constant value", &start
->where
);
15718 mpz_set (trip
, end
->value
.integer
);
15719 mpz_sub (trip
, trip
, start
->value
.integer
);
15720 mpz_add (trip
, trip
, step
->value
.integer
);
15722 mpz_div (trip
, trip
, step
->value
.integer
);
15724 mpz_set (frame
.value
, start
->value
.integer
);
15726 frame
.prev
= iter_stack
;
15727 frame
.variable
= var
->iter
.var
->symtree
;
15728 iter_stack
= &frame
;
15730 while (mpz_cmp_ui (trip
, 0) > 0)
15732 if (!traverse_data_var (var
->list
, where
))
15738 e
= gfc_copy_expr (var
->expr
);
15739 if (!gfc_simplify_expr (e
, 1))
15746 mpz_add (frame
.value
, frame
.value
, step
->value
.integer
);
15748 mpz_sub_ui (trip
, trip
, 1);
15752 mpz_clear (frame
.value
);
15755 gfc_free_expr (start
);
15756 gfc_free_expr (end
);
15757 gfc_free_expr (step
);
15759 iter_stack
= frame
.prev
;
15764 /* Type resolve variables in the variable list of a DATA statement. */
15767 traverse_data_var (gfc_data_variable
*var
, locus
*where
)
15771 for (; var
; var
= var
->next
)
15773 if (var
->expr
== NULL
)
15774 t
= traverse_data_list (var
, where
);
15776 t
= check_data_variable (var
, where
);
15786 /* Resolve the expressions and iterators associated with a data statement.
15787 This is separate from the assignment checking because data lists should
15788 only be resolved once. */
15791 resolve_data_variables (gfc_data_variable
*d
)
15793 for (; d
; d
= d
->next
)
15795 if (d
->list
== NULL
)
15797 if (!gfc_resolve_expr (d
->expr
))
15802 if (!gfc_resolve_iterator (&d
->iter
, false, true))
15805 if (!resolve_data_variables (d
->list
))
15814 /* Resolve a single DATA statement. We implement this by storing a pointer to
15815 the value list into static variables, and then recursively traversing the
15816 variables list, expanding iterators and such. */
15819 resolve_data (gfc_data
*d
)
15822 if (!resolve_data_variables (d
->var
))
15825 values
.vnode
= d
->value
;
15826 if (d
->value
== NULL
)
15827 mpz_set_ui (values
.left
, 0);
15829 mpz_set (values
.left
, d
->value
->repeat
);
15831 if (!traverse_data_var (d
->var
, &d
->where
))
15834 /* At this point, we better not have any values left. */
15836 if (next_data_value ())
15837 gfc_error ("DATA statement at %L has more values than variables",
15842 /* 12.6 Constraint: In a pure subprogram any variable which is in common or
15843 accessed by host or use association, is a dummy argument to a pure function,
15844 is a dummy argument with INTENT (IN) to a pure subroutine, or an object that
15845 is storage associated with any such variable, shall not be used in the
15846 following contexts: (clients of this function). */
15848 /* Determines if a variable is not 'pure', i.e., not assignable within a pure
15849 procedure. Returns zero if assignment is OK, nonzero if there is a
15852 gfc_impure_variable (gfc_symbol
*sym
)
15857 if (sym
->attr
.use_assoc
|| sym
->attr
.in_common
)
15860 /* Check if the symbol's ns is inside the pure procedure. */
15861 for (ns
= gfc_current_ns
; ns
; ns
= ns
->parent
)
15865 if (ns
->proc_name
->attr
.flavor
== FL_PROCEDURE
&& !sym
->attr
.function
)
15869 proc
= sym
->ns
->proc_name
;
15870 if (sym
->attr
.dummy
15871 && ((proc
->attr
.subroutine
&& sym
->attr
.intent
== INTENT_IN
)
15872 || proc
->attr
.function
))
15875 /* TODO: Sort out what can be storage associated, if anything, and include
15876 it here. In principle equivalences should be scanned but it does not
15877 seem to be possible to storage associate an impure variable this way. */
15882 /* Test whether a symbol is pure or not. For a NULL pointer, checks if the
15883 current namespace is inside a pure procedure. */
15886 gfc_pure (gfc_symbol
*sym
)
15888 symbol_attribute attr
;
15893 /* Check if the current namespace or one of its parents
15894 belongs to a pure procedure. */
15895 for (ns
= gfc_current_ns
; ns
; ns
= ns
->parent
)
15897 sym
= ns
->proc_name
;
15901 if (attr
.flavor
== FL_PROCEDURE
&& attr
.pure
)
15909 return attr
.flavor
== FL_PROCEDURE
&& attr
.pure
;
15913 /* Test whether a symbol is implicitly pure or not. For a NULL pointer,
15914 checks if the current namespace is implicitly pure. Note that this
15915 function returns false for a PURE procedure. */
15918 gfc_implicit_pure (gfc_symbol
*sym
)
15924 /* Check if the current procedure is implicit_pure. Walk up
15925 the procedure list until we find a procedure. */
15926 for (ns
= gfc_current_ns
; ns
; ns
= ns
->parent
)
15928 sym
= ns
->proc_name
;
15932 if (sym
->attr
.flavor
== FL_PROCEDURE
)
15937 return sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.implicit_pure
15938 && !sym
->attr
.pure
;
15943 gfc_unset_implicit_pure (gfc_symbol
*sym
)
15949 /* Check if the current procedure is implicit_pure. Walk up
15950 the procedure list until we find a procedure. */
15951 for (ns
= gfc_current_ns
; ns
; ns
= ns
->parent
)
15953 sym
= ns
->proc_name
;
15957 if (sym
->attr
.flavor
== FL_PROCEDURE
)
15962 if (sym
->attr
.flavor
== FL_PROCEDURE
)
15963 sym
->attr
.implicit_pure
= 0;
15965 sym
->attr
.pure
= 0;
15969 /* Test whether the current procedure is elemental or not. */
15972 gfc_elemental (gfc_symbol
*sym
)
15974 symbol_attribute attr
;
15977 sym
= gfc_current_ns
->proc_name
;
15982 return attr
.flavor
== FL_PROCEDURE
&& attr
.elemental
;
15986 /* Warn about unused labels. */
15989 warn_unused_fortran_label (gfc_st_label
*label
)
15994 warn_unused_fortran_label (label
->left
);
15996 if (label
->defined
== ST_LABEL_UNKNOWN
)
15999 switch (label
->referenced
)
16001 case ST_LABEL_UNKNOWN
:
16002 gfc_warning (OPT_Wunused_label
, "Label %d at %L defined but not used",
16003 label
->value
, &label
->where
);
16006 case ST_LABEL_BAD_TARGET
:
16007 gfc_warning (OPT_Wunused_label
,
16008 "Label %d at %L defined but cannot be used",
16009 label
->value
, &label
->where
);
16016 warn_unused_fortran_label (label
->right
);
16020 /* Returns the sequence type of a symbol or sequence. */
16023 sequence_type (gfc_typespec ts
)
16032 if (ts
.u
.derived
->components
== NULL
)
16033 return SEQ_NONDEFAULT
;
16035 result
= sequence_type (ts
.u
.derived
->components
->ts
);
16036 for (c
= ts
.u
.derived
->components
->next
; c
; c
= c
->next
)
16037 if (sequence_type (c
->ts
) != result
)
16043 if (ts
.kind
!= gfc_default_character_kind
)
16044 return SEQ_NONDEFAULT
;
16046 return SEQ_CHARACTER
;
16049 if (ts
.kind
!= gfc_default_integer_kind
)
16050 return SEQ_NONDEFAULT
;
16052 return SEQ_NUMERIC
;
16055 if (!(ts
.kind
== gfc_default_real_kind
16056 || ts
.kind
== gfc_default_double_kind
))
16057 return SEQ_NONDEFAULT
;
16059 return SEQ_NUMERIC
;
16062 if (ts
.kind
!= gfc_default_complex_kind
)
16063 return SEQ_NONDEFAULT
;
16065 return SEQ_NUMERIC
;
16068 if (ts
.kind
!= gfc_default_logical_kind
)
16069 return SEQ_NONDEFAULT
;
16071 return SEQ_NUMERIC
;
16074 return SEQ_NONDEFAULT
;
16079 /* Resolve derived type EQUIVALENCE object. */
16082 resolve_equivalence_derived (gfc_symbol
*derived
, gfc_symbol
*sym
, gfc_expr
*e
)
16084 gfc_component
*c
= derived
->components
;
16089 /* Shall not be an object of nonsequence derived type. */
16090 if (!derived
->attr
.sequence
)
16092 gfc_error ("Derived type variable %qs at %L must have SEQUENCE "
16093 "attribute to be an EQUIVALENCE object", sym
->name
,
16098 /* Shall not have allocatable components. */
16099 if (derived
->attr
.alloc_comp
)
16101 gfc_error ("Derived type variable %qs at %L cannot have ALLOCATABLE "
16102 "components to be an EQUIVALENCE object",sym
->name
,
16107 if (sym
->attr
.in_common
&& gfc_has_default_initializer (sym
->ts
.u
.derived
))
16109 gfc_error ("Derived type variable %qs at %L with default "
16110 "initialization cannot be in EQUIVALENCE with a variable "
16111 "in COMMON", sym
->name
, &e
->where
);
16115 for (; c
; c
= c
->next
)
16117 if (gfc_bt_struct (c
->ts
.type
)
16118 && (!resolve_equivalence_derived(c
->ts
.u
.derived
, sym
, e
)))
16121 /* Shall not be an object of sequence derived type containing a pointer
16122 in the structure. */
16123 if (c
->attr
.pointer
)
16125 gfc_error ("Derived type variable %qs at %L with pointer "
16126 "component(s) cannot be an EQUIVALENCE object",
16127 sym
->name
, &e
->where
);
16135 /* Resolve equivalence object.
16136 An EQUIVALENCE object shall not be a dummy argument, a pointer, a target,
16137 an allocatable array, an object of nonsequence derived type, an object of
16138 sequence derived type containing a pointer at any level of component
16139 selection, an automatic object, a function name, an entry name, a result
16140 name, a named constant, a structure component, or a subobject of any of
16141 the preceding objects. A substring shall not have length zero. A
16142 derived type shall not have components with default initialization nor
16143 shall two objects of an equivalence group be initialized.
16144 Either all or none of the objects shall have an protected attribute.
16145 The simple constraints are done in symbol.c(check_conflict) and the rest
16146 are implemented here. */
16149 resolve_equivalence (gfc_equiv
*eq
)
16152 gfc_symbol
*first_sym
;
16155 locus
*last_where
= NULL
;
16156 seq_type eq_type
, last_eq_type
;
16157 gfc_typespec
*last_ts
;
16158 int object
, cnt_protected
;
16161 last_ts
= &eq
->expr
->symtree
->n
.sym
->ts
;
16163 first_sym
= eq
->expr
->symtree
->n
.sym
;
16167 for (object
= 1; eq
; eq
= eq
->eq
, object
++)
16171 e
->ts
= e
->symtree
->n
.sym
->ts
;
16172 /* match_varspec might not know yet if it is seeing
16173 array reference or substring reference, as it doesn't
16175 if (e
->ref
&& e
->ref
->type
== REF_ARRAY
)
16177 gfc_ref
*ref
= e
->ref
;
16178 sym
= e
->symtree
->n
.sym
;
16180 if (sym
->attr
.dimension
)
16182 ref
->u
.ar
.as
= sym
->as
;
16186 /* For substrings, convert REF_ARRAY into REF_SUBSTRING. */
16187 if (e
->ts
.type
== BT_CHARACTER
16189 && ref
->type
== REF_ARRAY
16190 && ref
->u
.ar
.dimen
== 1
16191 && ref
->u
.ar
.dimen_type
[0] == DIMEN_RANGE
16192 && ref
->u
.ar
.stride
[0] == NULL
)
16194 gfc_expr
*start
= ref
->u
.ar
.start
[0];
16195 gfc_expr
*end
= ref
->u
.ar
.end
[0];
16198 /* Optimize away the (:) reference. */
16199 if (start
== NULL
&& end
== NULL
)
16202 e
->ref
= ref
->next
;
16204 e
->ref
->next
= ref
->next
;
16209 ref
->type
= REF_SUBSTRING
;
16211 start
= gfc_get_int_expr (gfc_charlen_int_kind
,
16213 ref
->u
.ss
.start
= start
;
16214 if (end
== NULL
&& e
->ts
.u
.cl
)
16215 end
= gfc_copy_expr (e
->ts
.u
.cl
->length
);
16216 ref
->u
.ss
.end
= end
;
16217 ref
->u
.ss
.length
= e
->ts
.u
.cl
;
16224 /* Any further ref is an error. */
16227 gcc_assert (ref
->type
== REF_ARRAY
);
16228 gfc_error ("Syntax error in EQUIVALENCE statement at %L",
16234 if (!gfc_resolve_expr (e
))
16237 sym
= e
->symtree
->n
.sym
;
16239 if (sym
->attr
.is_protected
)
16241 if (cnt_protected
> 0 && cnt_protected
!= object
)
16243 gfc_error ("Either all or none of the objects in the "
16244 "EQUIVALENCE set at %L shall have the "
16245 "PROTECTED attribute",
16250 /* Shall not equivalence common block variables in a PURE procedure. */
16251 if (sym
->ns
->proc_name
16252 && sym
->ns
->proc_name
->attr
.pure
16253 && sym
->attr
.in_common
)
16255 /* Need to check for symbols that may have entered the pure
16256 procedure via a USE statement. */
16257 bool saw_sym
= false;
16258 if (sym
->ns
->use_stmts
)
16261 for (r
= sym
->ns
->use_stmts
->rename
; r
; r
= r
->next
)
16262 if (strcmp(r
->use_name
, sym
->name
) == 0) saw_sym
= true;
16268 gfc_error ("COMMON block member %qs at %L cannot be an "
16269 "EQUIVALENCE object in the pure procedure %qs",
16270 sym
->name
, &e
->where
, sym
->ns
->proc_name
->name
);
16274 /* Shall not be a named constant. */
16275 if (e
->expr_type
== EXPR_CONSTANT
)
16277 gfc_error ("Named constant %qs at %L cannot be an EQUIVALENCE "
16278 "object", sym
->name
, &e
->where
);
16282 if (e
->ts
.type
== BT_DERIVED
16283 && !resolve_equivalence_derived (e
->ts
.u
.derived
, sym
, e
))
16286 /* Check that the types correspond correctly:
16288 A numeric sequence structure may be equivalenced to another sequence
16289 structure, an object of default integer type, default real type, double
16290 precision real type, default logical type such that components of the
16291 structure ultimately only become associated to objects of the same
16292 kind. A character sequence structure may be equivalenced to an object
16293 of default character kind or another character sequence structure.
16294 Other objects may be equivalenced only to objects of the same type and
16295 kind parameters. */
16297 /* Identical types are unconditionally OK. */
16298 if (object
== 1 || gfc_compare_types (last_ts
, &sym
->ts
))
16299 goto identical_types
;
16301 last_eq_type
= sequence_type (*last_ts
);
16302 eq_type
= sequence_type (sym
->ts
);
16304 /* Since the pair of objects is not of the same type, mixed or
16305 non-default sequences can be rejected. */
16307 msg
= "Sequence %s with mixed components in EQUIVALENCE "
16308 "statement at %L with different type objects";
16310 && last_eq_type
== SEQ_MIXED
16311 && !gfc_notify_std (GFC_STD_GNU
, msg
, first_sym
->name
, last_where
))
16312 || (eq_type
== SEQ_MIXED
16313 && !gfc_notify_std (GFC_STD_GNU
, msg
, sym
->name
, &e
->where
)))
16316 msg
= "Non-default type object or sequence %s in EQUIVALENCE "
16317 "statement at %L with objects of different type";
16319 && last_eq_type
== SEQ_NONDEFAULT
16320 && !gfc_notify_std (GFC_STD_GNU
, msg
, first_sym
->name
, last_where
))
16321 || (eq_type
== SEQ_NONDEFAULT
16322 && !gfc_notify_std (GFC_STD_GNU
, msg
, sym
->name
, &e
->where
)))
16325 msg
="Non-CHARACTER object %qs in default CHARACTER "
16326 "EQUIVALENCE statement at %L";
16327 if (last_eq_type
== SEQ_CHARACTER
16328 && eq_type
!= SEQ_CHARACTER
16329 && !gfc_notify_std (GFC_STD_GNU
, msg
, sym
->name
, &e
->where
))
16332 msg
="Non-NUMERIC object %qs in default NUMERIC "
16333 "EQUIVALENCE statement at %L";
16334 if (last_eq_type
== SEQ_NUMERIC
16335 && eq_type
!= SEQ_NUMERIC
16336 && !gfc_notify_std (GFC_STD_GNU
, msg
, sym
->name
, &e
->where
))
16341 last_where
= &e
->where
;
16346 /* Shall not be an automatic array. */
16347 if (e
->ref
->type
== REF_ARRAY
16348 && !gfc_resolve_array_spec (e
->ref
->u
.ar
.as
, 1))
16350 gfc_error ("Array %qs at %L with non-constant bounds cannot be "
16351 "an EQUIVALENCE object", sym
->name
, &e
->where
);
16358 /* Shall not be a structure component. */
16359 if (r
->type
== REF_COMPONENT
)
16361 gfc_error ("Structure component %qs at %L cannot be an "
16362 "EQUIVALENCE object",
16363 r
->u
.c
.component
->name
, &e
->where
);
16367 /* A substring shall not have length zero. */
16368 if (r
->type
== REF_SUBSTRING
)
16370 if (compare_bound (r
->u
.ss
.start
, r
->u
.ss
.end
) == CMP_GT
)
16372 gfc_error ("Substring at %L has length zero",
16373 &r
->u
.ss
.start
->where
);
16383 /* Function called by resolve_fntype to flag other symbol used in the
16384 length type parameter specification of function resuls. */
16387 flag_fn_result_spec (gfc_expr
*expr
,
16389 int *f ATTRIBUTE_UNUSED
)
16394 if (expr
->expr_type
== EXPR_VARIABLE
)
16396 s
= expr
->symtree
->n
.sym
;
16397 for (ns
= s
->ns
; ns
; ns
= ns
->parent
)
16403 gfc_error ("Self reference in character length expression "
16404 "for %qs at %L", sym
->name
, &expr
->where
);
16408 if (!s
->fn_result_spec
16409 && s
->attr
.flavor
== FL_PARAMETER
)
16411 /* Function contained in a module.... */
16412 if (ns
->proc_name
&& ns
->proc_name
->attr
.flavor
== FL_MODULE
)
16415 s
->fn_result_spec
= 1;
16416 /* Make sure that this symbol is translated as a module
16418 st
= gfc_get_unique_symtree (ns
);
16422 /* ... which is use associated and called. */
16423 else if (s
->attr
.use_assoc
|| s
->attr
.used_in_submodule
16425 /* External function matched with an interface. */
16428 && s
->ns
->proc_name
->attr
.if_source
== IFSRC_DECL
)
16429 || s
->ns
->proc_name
->attr
.if_source
== IFSRC_IFBODY
)
16430 && s
->ns
->proc_name
->attr
.function
))
16431 s
->fn_result_spec
= 1;
16438 /* Resolve function and ENTRY types, issue diagnostics if needed. */
16441 resolve_fntype (gfc_namespace
*ns
)
16443 gfc_entry_list
*el
;
16446 if (ns
->proc_name
== NULL
|| !ns
->proc_name
->attr
.function
)
16449 /* If there are any entries, ns->proc_name is the entry master
16450 synthetic symbol and ns->entries->sym actual FUNCTION symbol. */
16452 sym
= ns
->entries
->sym
;
16454 sym
= ns
->proc_name
;
16455 if (sym
->result
== sym
16456 && sym
->ts
.type
== BT_UNKNOWN
16457 && !gfc_set_default_type (sym
, 0, NULL
)
16458 && !sym
->attr
.untyped
)
16460 gfc_error ("Function %qs at %L has no IMPLICIT type",
16461 sym
->name
, &sym
->declared_at
);
16462 sym
->attr
.untyped
= 1;
16465 if (sym
->ts
.type
== BT_DERIVED
&& !sym
->ts
.u
.derived
->attr
.use_assoc
16466 && !sym
->attr
.contained
16467 && !gfc_check_symbol_access (sym
->ts
.u
.derived
)
16468 && gfc_check_symbol_access (sym
))
16470 gfc_notify_std (GFC_STD_F2003
, "PUBLIC function %qs at "
16471 "%L of PRIVATE type %qs", sym
->name
,
16472 &sym
->declared_at
, sym
->ts
.u
.derived
->name
);
16476 for (el
= ns
->entries
->next
; el
; el
= el
->next
)
16478 if (el
->sym
->result
== el
->sym
16479 && el
->sym
->ts
.type
== BT_UNKNOWN
16480 && !gfc_set_default_type (el
->sym
, 0, NULL
)
16481 && !el
->sym
->attr
.untyped
)
16483 gfc_error ("ENTRY %qs at %L has no IMPLICIT type",
16484 el
->sym
->name
, &el
->sym
->declared_at
);
16485 el
->sym
->attr
.untyped
= 1;
16489 if (sym
->ts
.type
== BT_CHARACTER
)
16490 gfc_traverse_expr (sym
->ts
.u
.cl
->length
, sym
, flag_fn_result_spec
, 0);
16494 /* 12.3.2.1.1 Defined operators. */
16497 check_uop_procedure (gfc_symbol
*sym
, locus where
)
16499 gfc_formal_arglist
*formal
;
16501 if (!sym
->attr
.function
)
16503 gfc_error ("User operator procedure %qs at %L must be a FUNCTION",
16504 sym
->name
, &where
);
16508 if (sym
->ts
.type
== BT_CHARACTER
16509 && !((sym
->ts
.u
.cl
&& sym
->ts
.u
.cl
->length
) || sym
->ts
.deferred
)
16510 && !(sym
->result
&& ((sym
->result
->ts
.u
.cl
16511 && sym
->result
->ts
.u
.cl
->length
) || sym
->result
->ts
.deferred
)))
16513 gfc_error ("User operator procedure %qs at %L cannot be assumed "
16514 "character length", sym
->name
, &where
);
16518 formal
= gfc_sym_get_dummy_args (sym
);
16519 if (!formal
|| !formal
->sym
)
16521 gfc_error ("User operator procedure %qs at %L must have at least "
16522 "one argument", sym
->name
, &where
);
16526 if (formal
->sym
->attr
.intent
!= INTENT_IN
)
16528 gfc_error ("First argument of operator interface at %L must be "
16529 "INTENT(IN)", &where
);
16533 if (formal
->sym
->attr
.optional
)
16535 gfc_error ("First argument of operator interface at %L cannot be "
16536 "optional", &where
);
16540 formal
= formal
->next
;
16541 if (!formal
|| !formal
->sym
)
16544 if (formal
->sym
->attr
.intent
!= INTENT_IN
)
16546 gfc_error ("Second argument of operator interface at %L must be "
16547 "INTENT(IN)", &where
);
16551 if (formal
->sym
->attr
.optional
)
16553 gfc_error ("Second argument of operator interface at %L cannot be "
16554 "optional", &where
);
16560 gfc_error ("Operator interface at %L must have, at most, two "
16561 "arguments", &where
);
16569 gfc_resolve_uops (gfc_symtree
*symtree
)
16571 gfc_interface
*itr
;
16573 if (symtree
== NULL
)
16576 gfc_resolve_uops (symtree
->left
);
16577 gfc_resolve_uops (symtree
->right
);
16579 for (itr
= symtree
->n
.uop
->op
; itr
; itr
= itr
->next
)
16580 check_uop_procedure (itr
->sym
, itr
->sym
->declared_at
);
16584 /* Examine all of the expressions associated with a program unit,
16585 assign types to all intermediate expressions, make sure that all
16586 assignments are to compatible types and figure out which names
16587 refer to which functions or subroutines. It doesn't check code
16588 block, which is handled by gfc_resolve_code. */
16591 resolve_types (gfc_namespace
*ns
)
16597 gfc_namespace
* old_ns
= gfc_current_ns
;
16599 if (ns
->types_resolved
)
16602 /* Check that all IMPLICIT types are ok. */
16603 if (!ns
->seen_implicit_none
)
16606 for (letter
= 0; letter
!= GFC_LETTERS
; ++letter
)
16607 if (ns
->set_flag
[letter
]
16608 && !resolve_typespec_used (&ns
->default_type
[letter
],
16609 &ns
->implicit_loc
[letter
], NULL
))
16613 gfc_current_ns
= ns
;
16615 resolve_entries (ns
);
16617 resolve_common_vars (&ns
->blank_common
, false);
16618 resolve_common_blocks (ns
->common_root
);
16620 resolve_contained_functions (ns
);
16622 if (ns
->proc_name
&& ns
->proc_name
->attr
.flavor
== FL_PROCEDURE
16623 && ns
->proc_name
->attr
.if_source
== IFSRC_IFBODY
)
16624 resolve_formal_arglist (ns
->proc_name
);
16626 gfc_traverse_ns (ns
, resolve_bind_c_derived_types
);
16628 for (cl
= ns
->cl_list
; cl
; cl
= cl
->next
)
16629 resolve_charlen (cl
);
16631 gfc_traverse_ns (ns
, resolve_symbol
);
16633 resolve_fntype (ns
);
16635 for (n
= ns
->contained
; n
; n
= n
->sibling
)
16637 if (gfc_pure (ns
->proc_name
) && !gfc_pure (n
->proc_name
))
16638 gfc_error ("Contained procedure %qs at %L of a PURE procedure must "
16639 "also be PURE", n
->proc_name
->name
,
16640 &n
->proc_name
->declared_at
);
16646 gfc_do_concurrent_flag
= 0;
16647 gfc_check_interfaces (ns
);
16649 gfc_traverse_ns (ns
, resolve_values
);
16655 for (d
= ns
->data
; d
; d
= d
->next
)
16659 gfc_traverse_ns (ns
, gfc_formalize_init_value
);
16661 gfc_traverse_ns (ns
, gfc_verify_binding_labels
);
16663 for (eq
= ns
->equiv
; eq
; eq
= eq
->next
)
16664 resolve_equivalence (eq
);
16666 /* Warn about unused labels. */
16667 if (warn_unused_label
)
16668 warn_unused_fortran_label (ns
->st_labels
);
16670 gfc_resolve_uops (ns
->uop_root
);
16672 gfc_traverse_ns (ns
, gfc_verify_DTIO_procedures
);
16674 gfc_resolve_omp_declare_simd (ns
);
16676 gfc_resolve_omp_udrs (ns
->omp_udr_root
);
16678 ns
->types_resolved
= 1;
16680 gfc_current_ns
= old_ns
;
16684 /* Call gfc_resolve_code recursively. */
16687 resolve_codes (gfc_namespace
*ns
)
16690 bitmap_obstack old_obstack
;
16692 if (ns
->resolved
== 1)
16695 for (n
= ns
->contained
; n
; n
= n
->sibling
)
16698 gfc_current_ns
= ns
;
16700 /* Don't clear 'cs_base' if this is the namespace of a BLOCK construct. */
16701 if (!(ns
->proc_name
&& ns
->proc_name
->attr
.flavor
== FL_LABEL
))
16704 /* Set to an out of range value. */
16705 current_entry_id
= -1;
16707 old_obstack
= labels_obstack
;
16708 bitmap_obstack_initialize (&labels_obstack
);
16710 gfc_resolve_oacc_declare (ns
);
16711 gfc_resolve_omp_local_vars (ns
);
16712 gfc_resolve_code (ns
->code
, ns
);
16714 bitmap_obstack_release (&labels_obstack
);
16715 labels_obstack
= old_obstack
;
16719 /* This function is called after a complete program unit has been compiled.
16720 Its purpose is to examine all of the expressions associated with a program
16721 unit, assign types to all intermediate expressions, make sure that all
16722 assignments are to compatible types and figure out which names refer to
16723 which functions or subroutines. */
16726 gfc_resolve (gfc_namespace
*ns
)
16728 gfc_namespace
*old_ns
;
16729 code_stack
*old_cs_base
;
16730 struct gfc_omp_saved_state old_omp_state
;
16736 old_ns
= gfc_current_ns
;
16737 old_cs_base
= cs_base
;
16739 /* As gfc_resolve can be called during resolution of an OpenMP construct
16740 body, we should clear any state associated to it, so that say NS's
16741 DO loops are not interpreted as OpenMP loops. */
16742 if (!ns
->construct_entities
)
16743 gfc_omp_save_and_clear_state (&old_omp_state
);
16745 resolve_types (ns
);
16746 component_assignment_level
= 0;
16747 resolve_codes (ns
);
16749 gfc_current_ns
= old_ns
;
16750 cs_base
= old_cs_base
;
16753 gfc_run_passes (ns
);
16755 if (!ns
->construct_entities
)
16756 gfc_omp_restore_state (&old_omp_state
);