1 /* Perform type resolution on the various structures.
2 Copyright (C) 2001-2018 Free Software Foundation, Inc.
3 Contributed by Andy Vaught
5 This file is part of GCC.
7 GCC is free software; you can redistribute it and/or modify it under
8 the terms of the GNU General Public License as published by the Free
9 Software Foundation; either version 3, or (at your option) any later
12 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
13 WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
17 You should have received a copy of the GNU General Public License
18 along with GCC; see the file COPYING3. If not see
19 <http://www.gnu.org/licenses/>. */
23 #include "coretypes.h"
27 #include "arith.h" /* For gfc_compare_expr(). */
28 #include "dependency.h"
30 #include "target-memory.h" /* for gfc_simplify_transfer */
31 #include "constructor.h"
33 /* Types used in equivalence statements. */
37 SEQ_NONDEFAULT
, SEQ_NUMERIC
, SEQ_CHARACTER
, SEQ_MIXED
40 /* Stack to keep track of the nesting of blocks as we move through the
41 code. See resolve_branch() and gfc_resolve_code(). */
43 typedef struct code_stack
45 struct gfc_code
*head
, *current
;
46 struct code_stack
*prev
;
48 /* This bitmap keeps track of the targets valid for a branch from
49 inside this block except for END {IF|SELECT}s of enclosing
51 bitmap reachable_labels
;
55 static code_stack
*cs_base
= NULL
;
58 /* Nonzero if we're inside a FORALL or DO CONCURRENT block. */
60 static int forall_flag
;
61 int gfc_do_concurrent_flag
;
63 /* True when we are resolving an expression that is an actual argument to
65 static bool actual_arg
= false;
66 /* True when we are resolving an expression that is the first actual argument
68 static bool first_actual_arg
= false;
71 /* Nonzero if we're inside a OpenMP WORKSHARE or PARALLEL WORKSHARE block. */
73 static int omp_workshare_flag
;
75 /* True if we are processing a formal arglist. The corresponding function
76 resets the flag each time that it is read. */
77 static bool formal_arg_flag
= false;
79 /* True if we are resolving a specification expression. */
80 static bool specification_expr
= false;
82 /* The id of the last entry seen. */
83 static int current_entry_id
;
85 /* We use bitmaps to determine if a branch target is valid. */
86 static bitmap_obstack labels_obstack
;
88 /* True when simplifying a EXPR_VARIABLE argument to an inquiry function. */
89 static bool inquiry_argument
= false;
93 gfc_is_formal_arg (void)
95 return formal_arg_flag
;
98 /* Is the symbol host associated? */
100 is_sym_host_assoc (gfc_symbol
*sym
, gfc_namespace
*ns
)
102 for (ns
= ns
->parent
; ns
; ns
= ns
->parent
)
111 /* Ensure a typespec used is valid; for instance, TYPE(t) is invalid if t is
112 an ABSTRACT derived-type. If where is not NULL, an error message with that
113 locus is printed, optionally using name. */
116 resolve_typespec_used (gfc_typespec
* ts
, locus
* where
, const char* name
)
118 if (ts
->type
== BT_DERIVED
&& ts
->u
.derived
->attr
.abstract
)
123 gfc_error ("%qs at %L is of the ABSTRACT type %qs",
124 name
, where
, ts
->u
.derived
->name
);
126 gfc_error ("ABSTRACT type %qs used at %L",
127 ts
->u
.derived
->name
, where
);
138 check_proc_interface (gfc_symbol
*ifc
, locus
*where
)
140 /* Several checks for F08:C1216. */
141 if (ifc
->attr
.procedure
)
143 gfc_error ("Interface %qs at %L is declared "
144 "in a later PROCEDURE statement", ifc
->name
, where
);
149 /* For generic interfaces, check if there is
150 a specific procedure with the same name. */
151 gfc_interface
*gen
= ifc
->generic
;
152 while (gen
&& strcmp (gen
->sym
->name
, ifc
->name
) != 0)
156 gfc_error ("Interface %qs at %L may not be generic",
161 if (ifc
->attr
.proc
== PROC_ST_FUNCTION
)
163 gfc_error ("Interface %qs at %L may not be a statement function",
167 if (gfc_is_intrinsic (ifc
, 0, ifc
->declared_at
)
168 || gfc_is_intrinsic (ifc
, 1, ifc
->declared_at
))
169 ifc
->attr
.intrinsic
= 1;
170 if (ifc
->attr
.intrinsic
&& !gfc_intrinsic_actual_ok (ifc
->name
, 0))
172 gfc_error ("Intrinsic procedure %qs not allowed in "
173 "PROCEDURE statement at %L", ifc
->name
, where
);
176 if (!ifc
->attr
.if_source
&& !ifc
->attr
.intrinsic
&& ifc
->name
[0] != '\0')
178 gfc_error ("Interface %qs at %L must be explicit", ifc
->name
, where
);
185 static void resolve_symbol (gfc_symbol
*sym
);
188 /* Resolve the interface for a PROCEDURE declaration or procedure pointer. */
191 resolve_procedure_interface (gfc_symbol
*sym
)
193 gfc_symbol
*ifc
= sym
->ts
.interface
;
200 gfc_error ("PROCEDURE %qs at %L may not be used as its own interface",
201 sym
->name
, &sym
->declared_at
);
204 if (!check_proc_interface (ifc
, &sym
->declared_at
))
207 if (ifc
->attr
.if_source
|| ifc
->attr
.intrinsic
)
209 /* Resolve interface and copy attributes. */
210 resolve_symbol (ifc
);
211 if (ifc
->attr
.intrinsic
)
212 gfc_resolve_intrinsic (ifc
, &ifc
->declared_at
);
216 sym
->ts
= ifc
->result
->ts
;
217 sym
->attr
.allocatable
= ifc
->result
->attr
.allocatable
;
218 sym
->attr
.pointer
= ifc
->result
->attr
.pointer
;
219 sym
->attr
.dimension
= ifc
->result
->attr
.dimension
;
220 sym
->attr
.class_ok
= ifc
->result
->attr
.class_ok
;
221 sym
->as
= gfc_copy_array_spec (ifc
->result
->as
);
227 sym
->attr
.allocatable
= ifc
->attr
.allocatable
;
228 sym
->attr
.pointer
= ifc
->attr
.pointer
;
229 sym
->attr
.dimension
= ifc
->attr
.dimension
;
230 sym
->attr
.class_ok
= ifc
->attr
.class_ok
;
231 sym
->as
= gfc_copy_array_spec (ifc
->as
);
233 sym
->ts
.interface
= ifc
;
234 sym
->attr
.function
= ifc
->attr
.function
;
235 sym
->attr
.subroutine
= ifc
->attr
.subroutine
;
237 sym
->attr
.pure
= ifc
->attr
.pure
;
238 sym
->attr
.elemental
= ifc
->attr
.elemental
;
239 sym
->attr
.contiguous
= ifc
->attr
.contiguous
;
240 sym
->attr
.recursive
= ifc
->attr
.recursive
;
241 sym
->attr
.always_explicit
= ifc
->attr
.always_explicit
;
242 sym
->attr
.ext_attr
|= ifc
->attr
.ext_attr
;
243 sym
->attr
.is_bind_c
= ifc
->attr
.is_bind_c
;
244 /* Copy char length. */
245 if (ifc
->ts
.type
== BT_CHARACTER
&& ifc
->ts
.u
.cl
)
247 sym
->ts
.u
.cl
= gfc_new_charlen (sym
->ns
, ifc
->ts
.u
.cl
);
248 if (sym
->ts
.u
.cl
->length
&& !sym
->ts
.u
.cl
->resolved
249 && !gfc_resolve_expr (sym
->ts
.u
.cl
->length
))
258 /* Resolve types of formal argument lists. These have to be done early so that
259 the formal argument lists of module procedures can be copied to the
260 containing module before the individual procedures are resolved
261 individually. We also resolve argument lists of procedures in interface
262 blocks because they are self-contained scoping units.
264 Since a dummy argument cannot be a non-dummy procedure, the only
265 resort left for untyped names are the IMPLICIT types. */
268 resolve_formal_arglist (gfc_symbol
*proc
)
270 gfc_formal_arglist
*f
;
272 bool saved_specification_expr
;
275 if (proc
->result
!= NULL
)
280 if (gfc_elemental (proc
)
281 || sym
->attr
.pointer
|| sym
->attr
.allocatable
282 || (sym
->as
&& sym
->as
->rank
!= 0))
284 proc
->attr
.always_explicit
= 1;
285 sym
->attr
.always_explicit
= 1;
288 formal_arg_flag
= true;
290 for (f
= proc
->formal
; f
; f
= f
->next
)
298 /* Alternate return placeholder. */
299 if (gfc_elemental (proc
))
300 gfc_error ("Alternate return specifier in elemental subroutine "
301 "%qs at %L is not allowed", proc
->name
,
303 if (proc
->attr
.function
)
304 gfc_error ("Alternate return specifier in function "
305 "%qs at %L is not allowed", proc
->name
,
309 else if (sym
->attr
.procedure
&& sym
->attr
.if_source
!= IFSRC_DECL
310 && !resolve_procedure_interface (sym
))
313 if (strcmp (proc
->name
, sym
->name
) == 0)
315 gfc_error ("Self-referential argument "
316 "%qs at %L is not allowed", sym
->name
,
321 if (sym
->attr
.if_source
!= IFSRC_UNKNOWN
)
322 resolve_formal_arglist (sym
);
324 if (sym
->attr
.subroutine
|| sym
->attr
.external
)
326 if (sym
->attr
.flavor
== FL_UNKNOWN
)
327 gfc_add_flavor (&sym
->attr
, FL_PROCEDURE
, sym
->name
, &sym
->declared_at
);
331 if (sym
->ts
.type
== BT_UNKNOWN
&& !proc
->attr
.intrinsic
332 && (!sym
->attr
.function
|| sym
->result
== sym
))
333 gfc_set_default_type (sym
, 1, sym
->ns
);
336 as
= sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
337 ? CLASS_DATA (sym
)->as
: sym
->as
;
339 saved_specification_expr
= specification_expr
;
340 specification_expr
= true;
341 gfc_resolve_array_spec (as
, 0);
342 specification_expr
= saved_specification_expr
;
344 /* We can't tell if an array with dimension (:) is assumed or deferred
345 shape until we know if it has the pointer or allocatable attributes.
347 if (as
&& as
->rank
> 0 && as
->type
== AS_DEFERRED
348 && ((sym
->ts
.type
!= BT_CLASS
349 && !(sym
->attr
.pointer
|| sym
->attr
.allocatable
))
350 || (sym
->ts
.type
== BT_CLASS
351 && !(CLASS_DATA (sym
)->attr
.class_pointer
352 || CLASS_DATA (sym
)->attr
.allocatable
)))
353 && sym
->attr
.flavor
!= FL_PROCEDURE
)
355 as
->type
= AS_ASSUMED_SHAPE
;
356 for (i
= 0; i
< as
->rank
; i
++)
357 as
->lower
[i
] = gfc_get_int_expr (gfc_default_integer_kind
, NULL
, 1);
360 if ((as
&& as
->rank
> 0 && as
->type
== AS_ASSUMED_SHAPE
)
361 || (as
&& as
->type
== AS_ASSUMED_RANK
)
362 || sym
->attr
.pointer
|| sym
->attr
.allocatable
|| sym
->attr
.target
363 || (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
364 && (CLASS_DATA (sym
)->attr
.class_pointer
365 || CLASS_DATA (sym
)->attr
.allocatable
366 || CLASS_DATA (sym
)->attr
.target
))
367 || sym
->attr
.optional
)
369 proc
->attr
.always_explicit
= 1;
371 proc
->result
->attr
.always_explicit
= 1;
374 /* If the flavor is unknown at this point, it has to be a variable.
375 A procedure specification would have already set the type. */
377 if (sym
->attr
.flavor
== FL_UNKNOWN
)
378 gfc_add_flavor (&sym
->attr
, FL_VARIABLE
, sym
->name
, &sym
->declared_at
);
382 if (sym
->attr
.flavor
== FL_PROCEDURE
)
387 gfc_error ("Dummy procedure %qs of PURE procedure at %L must "
388 "also be PURE", sym
->name
, &sym
->declared_at
);
392 else if (!sym
->attr
.pointer
)
394 if (proc
->attr
.function
&& sym
->attr
.intent
!= INTENT_IN
)
397 gfc_notify_std (GFC_STD_F2008
, "Argument %qs"
398 " of pure function %qs at %L with VALUE "
399 "attribute but without INTENT(IN)",
400 sym
->name
, proc
->name
, &sym
->declared_at
);
402 gfc_error ("Argument %qs of pure function %qs at %L must "
403 "be INTENT(IN) or VALUE", sym
->name
, proc
->name
,
407 if (proc
->attr
.subroutine
&& sym
->attr
.intent
== INTENT_UNKNOWN
)
410 gfc_notify_std (GFC_STD_F2008
, "Argument %qs"
411 " of pure subroutine %qs at %L with VALUE "
412 "attribute but without INTENT", sym
->name
,
413 proc
->name
, &sym
->declared_at
);
415 gfc_error ("Argument %qs of pure subroutine %qs at %L "
416 "must have its INTENT specified or have the "
417 "VALUE attribute", sym
->name
, proc
->name
,
423 if (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.intent
== INTENT_OUT
)
425 gfc_error ("INTENT(OUT) argument %qs of pure procedure %qs at %L"
426 " may not be polymorphic", sym
->name
, proc
->name
,
432 if (proc
->attr
.implicit_pure
)
434 if (sym
->attr
.flavor
== FL_PROCEDURE
)
437 proc
->attr
.implicit_pure
= 0;
439 else if (!sym
->attr
.pointer
)
441 if (proc
->attr
.function
&& sym
->attr
.intent
!= INTENT_IN
443 proc
->attr
.implicit_pure
= 0;
445 if (proc
->attr
.subroutine
&& sym
->attr
.intent
== INTENT_UNKNOWN
447 proc
->attr
.implicit_pure
= 0;
451 if (gfc_elemental (proc
))
454 if (sym
->attr
.codimension
455 || (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
)
456 && CLASS_DATA (sym
)->attr
.codimension
))
458 gfc_error ("Coarray dummy argument %qs at %L to elemental "
459 "procedure", sym
->name
, &sym
->declared_at
);
463 if (sym
->as
|| (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
)
464 && CLASS_DATA (sym
)->as
))
466 gfc_error ("Argument %qs of elemental procedure at %L must "
467 "be scalar", sym
->name
, &sym
->declared_at
);
471 if (sym
->attr
.allocatable
472 || (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
)
473 && CLASS_DATA (sym
)->attr
.allocatable
))
475 gfc_error ("Argument %qs of elemental procedure at %L cannot "
476 "have the ALLOCATABLE attribute", sym
->name
,
481 if (sym
->attr
.pointer
482 || (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
)
483 && CLASS_DATA (sym
)->attr
.class_pointer
))
485 gfc_error ("Argument %qs of elemental procedure at %L cannot "
486 "have the POINTER attribute", sym
->name
,
491 if (sym
->attr
.flavor
== FL_PROCEDURE
)
493 gfc_error ("Dummy procedure %qs not allowed in elemental "
494 "procedure %qs at %L", sym
->name
, proc
->name
,
499 /* Fortran 2008 Corrigendum 1, C1290a. */
500 if (sym
->attr
.intent
== INTENT_UNKNOWN
&& !sym
->attr
.value
)
502 gfc_error ("Argument %qs of elemental procedure %qs at %L must "
503 "have its INTENT specified or have the VALUE "
504 "attribute", sym
->name
, proc
->name
,
510 /* Each dummy shall be specified to be scalar. */
511 if (proc
->attr
.proc
== PROC_ST_FUNCTION
)
515 /* F03:C1263 (R1238) The function-name and each dummy-arg-name
516 shall be specified, explicitly or implicitly, to be scalar. */
517 gfc_error ("Argument '%s' of statement function '%s' at %L "
518 "must be scalar", sym
->name
, proc
->name
,
523 if (sym
->ts
.type
== BT_CHARACTER
)
525 gfc_charlen
*cl
= sym
->ts
.u
.cl
;
526 if (!cl
|| !cl
->length
|| cl
->length
->expr_type
!= EXPR_CONSTANT
)
528 gfc_error ("Character-valued argument %qs of statement "
529 "function at %L must have constant length",
530 sym
->name
, &sym
->declared_at
);
536 formal_arg_flag
= false;
540 /* Work function called when searching for symbols that have argument lists
541 associated with them. */
544 find_arglists (gfc_symbol
*sym
)
546 if (sym
->attr
.if_source
== IFSRC_UNKNOWN
|| sym
->ns
!= gfc_current_ns
547 || gfc_fl_struct (sym
->attr
.flavor
) || sym
->attr
.intrinsic
)
550 resolve_formal_arglist (sym
);
554 /* Given a namespace, resolve all formal argument lists within the namespace.
558 resolve_formal_arglists (gfc_namespace
*ns
)
563 gfc_traverse_ns (ns
, find_arglists
);
568 resolve_contained_fntype (gfc_symbol
*sym
, gfc_namespace
*ns
)
572 if (sym
&& sym
->attr
.flavor
== FL_PROCEDURE
574 && sym
->ns
->parent
->proc_name
575 && sym
->ns
->parent
->proc_name
->attr
.flavor
== FL_PROCEDURE
576 && !strcmp (sym
->name
, sym
->ns
->parent
->proc_name
->name
))
577 gfc_error ("Contained procedure %qs at %L has the same name as its "
578 "encompassing procedure", sym
->name
, &sym
->declared_at
);
580 /* If this namespace is not a function or an entry master function,
582 if (! sym
|| !(sym
->attr
.function
|| sym
->attr
.flavor
== FL_VARIABLE
)
583 || sym
->attr
.entry_master
)
586 /* Try to find out of what the return type is. */
587 if (sym
->result
->ts
.type
== BT_UNKNOWN
&& sym
->result
->ts
.interface
== NULL
)
589 t
= gfc_set_default_type (sym
->result
, 0, ns
);
591 if (!t
&& !sym
->result
->attr
.untyped
)
593 if (sym
->result
== sym
)
594 gfc_error ("Contained function %qs at %L has no IMPLICIT type",
595 sym
->name
, &sym
->declared_at
);
596 else if (!sym
->result
->attr
.proc_pointer
)
597 gfc_error ("Result %qs of contained function %qs at %L has "
598 "no IMPLICIT type", sym
->result
->name
, sym
->name
,
599 &sym
->result
->declared_at
);
600 sym
->result
->attr
.untyped
= 1;
604 /* Fortran 2008 Draft Standard, page 535, C418, on type-param-value
605 type, lists the only ways a character length value of * can be used:
606 dummy arguments of procedures, named constants, function results and
607 in allocate statements if the allocate_object is an assumed length dummy
608 in external functions. Internal function results and results of module
609 procedures are not on this list, ergo, not permitted. */
611 if (sym
->result
->ts
.type
== BT_CHARACTER
)
613 gfc_charlen
*cl
= sym
->result
->ts
.u
.cl
;
614 if ((!cl
|| !cl
->length
) && !sym
->result
->ts
.deferred
)
616 /* See if this is a module-procedure and adapt error message
619 gcc_assert (ns
->parent
&& ns
->parent
->proc_name
);
620 module_proc
= (ns
->parent
->proc_name
->attr
.flavor
== FL_MODULE
);
622 gfc_error (module_proc
623 ? G_("Character-valued module procedure %qs at %L"
624 " must not be assumed length")
625 : G_("Character-valued internal function %qs at %L"
626 " must not be assumed length"),
627 sym
->name
, &sym
->declared_at
);
633 /* Add NEW_ARGS to the formal argument list of PROC, taking care not to
634 introduce duplicates. */
637 merge_argument_lists (gfc_symbol
*proc
, gfc_formal_arglist
*new_args
)
639 gfc_formal_arglist
*f
, *new_arglist
;
642 for (; new_args
!= NULL
; new_args
= new_args
->next
)
644 new_sym
= new_args
->sym
;
645 /* See if this arg is already in the formal argument list. */
646 for (f
= proc
->formal
; f
; f
= f
->next
)
648 if (new_sym
== f
->sym
)
655 /* Add a new argument. Argument order is not important. */
656 new_arglist
= gfc_get_formal_arglist ();
657 new_arglist
->sym
= new_sym
;
658 new_arglist
->next
= proc
->formal
;
659 proc
->formal
= new_arglist
;
664 /* Flag the arguments that are not present in all entries. */
667 check_argument_lists (gfc_symbol
*proc
, gfc_formal_arglist
*new_args
)
669 gfc_formal_arglist
*f
, *head
;
672 for (f
= proc
->formal
; f
; f
= f
->next
)
677 for (new_args
= head
; new_args
; new_args
= new_args
->next
)
679 if (new_args
->sym
== f
->sym
)
686 f
->sym
->attr
.not_always_present
= 1;
691 /* Resolve alternate entry points. If a symbol has multiple entry points we
692 create a new master symbol for the main routine, and turn the existing
693 symbol into an entry point. */
696 resolve_entries (gfc_namespace
*ns
)
698 gfc_namespace
*old_ns
;
702 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
703 static int master_count
= 0;
705 if (ns
->proc_name
== NULL
)
708 /* No need to do anything if this procedure doesn't have alternate entry
713 /* We may already have resolved alternate entry points. */
714 if (ns
->proc_name
->attr
.entry_master
)
717 /* If this isn't a procedure something has gone horribly wrong. */
718 gcc_assert (ns
->proc_name
->attr
.flavor
== FL_PROCEDURE
);
720 /* Remember the current namespace. */
721 old_ns
= gfc_current_ns
;
725 /* Add the main entry point to the list of entry points. */
726 el
= gfc_get_entry_list ();
727 el
->sym
= ns
->proc_name
;
729 el
->next
= ns
->entries
;
731 ns
->proc_name
->attr
.entry
= 1;
733 /* If it is a module function, it needs to be in the right namespace
734 so that gfc_get_fake_result_decl can gather up the results. The
735 need for this arose in get_proc_name, where these beasts were
736 left in their own namespace, to keep prior references linked to
737 the entry declaration.*/
738 if (ns
->proc_name
->attr
.function
739 && ns
->parent
&& ns
->parent
->proc_name
->attr
.flavor
== FL_MODULE
)
742 /* Do the same for entries where the master is not a module
743 procedure. These are retained in the module namespace because
744 of the module procedure declaration. */
745 for (el
= el
->next
; el
; el
= el
->next
)
746 if (el
->sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
747 && el
->sym
->attr
.mod_proc
)
751 /* Add an entry statement for it. */
752 c
= gfc_get_code (EXEC_ENTRY
);
757 /* Create a new symbol for the master function. */
758 /* Give the internal function a unique name (within this file).
759 Also include the function name so the user has some hope of figuring
760 out what is going on. */
761 snprintf (name
, GFC_MAX_SYMBOL_LEN
, "master.%d.%s",
762 master_count
++, ns
->proc_name
->name
);
763 gfc_get_ha_symbol (name
, &proc
);
764 gcc_assert (proc
!= NULL
);
766 gfc_add_procedure (&proc
->attr
, PROC_INTERNAL
, proc
->name
, NULL
);
767 if (ns
->proc_name
->attr
.subroutine
)
768 gfc_add_subroutine (&proc
->attr
, proc
->name
, NULL
);
772 gfc_typespec
*ts
, *fts
;
773 gfc_array_spec
*as
, *fas
;
774 gfc_add_function (&proc
->attr
, proc
->name
, NULL
);
776 fas
= ns
->entries
->sym
->as
;
777 fas
= fas
? fas
: ns
->entries
->sym
->result
->as
;
778 fts
= &ns
->entries
->sym
->result
->ts
;
779 if (fts
->type
== BT_UNKNOWN
)
780 fts
= gfc_get_default_type (ns
->entries
->sym
->result
->name
, NULL
);
781 for (el
= ns
->entries
->next
; el
; el
= el
->next
)
783 ts
= &el
->sym
->result
->ts
;
785 as
= as
? as
: el
->sym
->result
->as
;
786 if (ts
->type
== BT_UNKNOWN
)
787 ts
= gfc_get_default_type (el
->sym
->result
->name
, NULL
);
789 if (! gfc_compare_types (ts
, fts
)
790 || (el
->sym
->result
->attr
.dimension
791 != ns
->entries
->sym
->result
->attr
.dimension
)
792 || (el
->sym
->result
->attr
.pointer
793 != ns
->entries
->sym
->result
->attr
.pointer
))
795 else if (as
&& fas
&& ns
->entries
->sym
->result
!= el
->sym
->result
796 && gfc_compare_array_spec (as
, fas
) == 0)
797 gfc_error ("Function %s at %L has entries with mismatched "
798 "array specifications", ns
->entries
->sym
->name
,
799 &ns
->entries
->sym
->declared_at
);
800 /* The characteristics need to match and thus both need to have
801 the same string length, i.e. both len=*, or both len=4.
802 Having both len=<variable> is also possible, but difficult to
803 check at compile time. */
804 else if (ts
->type
== BT_CHARACTER
&& ts
->u
.cl
&& fts
->u
.cl
805 && (((ts
->u
.cl
->length
&& !fts
->u
.cl
->length
)
806 ||(!ts
->u
.cl
->length
&& fts
->u
.cl
->length
))
808 && ts
->u
.cl
->length
->expr_type
809 != fts
->u
.cl
->length
->expr_type
)
811 && ts
->u
.cl
->length
->expr_type
== EXPR_CONSTANT
812 && mpz_cmp (ts
->u
.cl
->length
->value
.integer
,
813 fts
->u
.cl
->length
->value
.integer
) != 0)))
814 gfc_notify_std (GFC_STD_GNU
, "Function %s at %L with "
815 "entries returning variables of different "
816 "string lengths", ns
->entries
->sym
->name
,
817 &ns
->entries
->sym
->declared_at
);
822 sym
= ns
->entries
->sym
->result
;
823 /* All result types the same. */
825 if (sym
->attr
.dimension
)
826 gfc_set_array_spec (proc
, gfc_copy_array_spec (sym
->as
), NULL
);
827 if (sym
->attr
.pointer
)
828 gfc_add_pointer (&proc
->attr
, NULL
);
832 /* Otherwise the result will be passed through a union by
834 proc
->attr
.mixed_entry_master
= 1;
835 for (el
= ns
->entries
; el
; el
= el
->next
)
837 sym
= el
->sym
->result
;
838 if (sym
->attr
.dimension
)
840 if (el
== ns
->entries
)
841 gfc_error ("FUNCTION result %s can't be an array in "
842 "FUNCTION %s at %L", sym
->name
,
843 ns
->entries
->sym
->name
, &sym
->declared_at
);
845 gfc_error ("ENTRY result %s can't be an array in "
846 "FUNCTION %s at %L", sym
->name
,
847 ns
->entries
->sym
->name
, &sym
->declared_at
);
849 else if (sym
->attr
.pointer
)
851 if (el
== ns
->entries
)
852 gfc_error ("FUNCTION result %s can't be a POINTER in "
853 "FUNCTION %s at %L", sym
->name
,
854 ns
->entries
->sym
->name
, &sym
->declared_at
);
856 gfc_error ("ENTRY result %s can't be a POINTER in "
857 "FUNCTION %s at %L", sym
->name
,
858 ns
->entries
->sym
->name
, &sym
->declared_at
);
863 if (ts
->type
== BT_UNKNOWN
)
864 ts
= gfc_get_default_type (sym
->name
, NULL
);
868 if (ts
->kind
== gfc_default_integer_kind
)
872 if (ts
->kind
== gfc_default_real_kind
873 || ts
->kind
== gfc_default_double_kind
)
877 if (ts
->kind
== gfc_default_complex_kind
)
881 if (ts
->kind
== gfc_default_logical_kind
)
885 /* We will issue error elsewhere. */
893 if (el
== ns
->entries
)
894 gfc_error ("FUNCTION result %s can't be of type %s "
895 "in FUNCTION %s at %L", sym
->name
,
896 gfc_typename (ts
), ns
->entries
->sym
->name
,
899 gfc_error ("ENTRY result %s can't be of type %s "
900 "in FUNCTION %s at %L", sym
->name
,
901 gfc_typename (ts
), ns
->entries
->sym
->name
,
908 proc
->attr
.access
= ACCESS_PRIVATE
;
909 proc
->attr
.entry_master
= 1;
911 /* Merge all the entry point arguments. */
912 for (el
= ns
->entries
; el
; el
= el
->next
)
913 merge_argument_lists (proc
, el
->sym
->formal
);
915 /* Check the master formal arguments for any that are not
916 present in all entry points. */
917 for (el
= ns
->entries
; el
; el
= el
->next
)
918 check_argument_lists (proc
, el
->sym
->formal
);
920 /* Use the master function for the function body. */
921 ns
->proc_name
= proc
;
923 /* Finalize the new symbols. */
924 gfc_commit_symbols ();
926 /* Restore the original namespace. */
927 gfc_current_ns
= old_ns
;
931 /* Resolve common variables. */
933 resolve_common_vars (gfc_common_head
*common_block
, bool named_common
)
935 gfc_symbol
*csym
= common_block
->head
;
937 for (; csym
; csym
= csym
->common_next
)
939 /* gfc_add_in_common may have been called before, but the reported errors
940 have been ignored to continue parsing.
941 We do the checks again here. */
942 if (!csym
->attr
.use_assoc
)
943 gfc_add_in_common (&csym
->attr
, csym
->name
, &common_block
->where
);
945 if (csym
->value
|| csym
->attr
.data
)
947 if (!csym
->ns
->is_block_data
)
948 gfc_notify_std (GFC_STD_GNU
, "Variable %qs at %L is in COMMON "
949 "but only in BLOCK DATA initialization is "
950 "allowed", csym
->name
, &csym
->declared_at
);
951 else if (!named_common
)
952 gfc_notify_std (GFC_STD_GNU
, "Initialized variable %qs at %L is "
953 "in a blank COMMON but initialization is only "
954 "allowed in named common blocks", csym
->name
,
958 if (UNLIMITED_POLY (csym
))
959 gfc_error_now ("%qs in cannot appear in COMMON at %L "
960 "[F2008:C5100]", csym
->name
, &csym
->declared_at
);
962 if (csym
->ts
.type
!= BT_DERIVED
)
965 if (!(csym
->ts
.u
.derived
->attr
.sequence
966 || csym
->ts
.u
.derived
->attr
.is_bind_c
))
967 gfc_error_now ("Derived type variable %qs in COMMON at %L "
968 "has neither the SEQUENCE nor the BIND(C) "
969 "attribute", csym
->name
, &csym
->declared_at
);
970 if (csym
->ts
.u
.derived
->attr
.alloc_comp
)
971 gfc_error_now ("Derived type variable %qs in COMMON at %L "
972 "has an ultimate component that is "
973 "allocatable", csym
->name
, &csym
->declared_at
);
974 if (gfc_has_default_initializer (csym
->ts
.u
.derived
))
975 gfc_error_now ("Derived type variable %qs in COMMON at %L "
976 "may not have default initializer", csym
->name
,
979 if (csym
->attr
.flavor
== FL_UNKNOWN
&& !csym
->attr
.proc_pointer
)
980 gfc_add_flavor (&csym
->attr
, FL_VARIABLE
, csym
->name
, &csym
->declared_at
);
984 /* Resolve common blocks. */
986 resolve_common_blocks (gfc_symtree
*common_root
)
991 if (common_root
== NULL
)
994 if (common_root
->left
)
995 resolve_common_blocks (common_root
->left
);
996 if (common_root
->right
)
997 resolve_common_blocks (common_root
->right
);
999 resolve_common_vars (common_root
->n
.common
, true);
1001 if (!gfc_notify_std (GFC_STD_F2018_OBS
, "COMMON block at %L",
1002 &common_root
->n
.common
->where
))
1005 /* The common name is a global name - in Fortran 2003 also if it has a
1006 C binding name, since Fortran 2008 only the C binding name is a global
1008 if (!common_root
->n
.common
->binding_label
1009 || gfc_notification_std (GFC_STD_F2008
))
1011 gsym
= gfc_find_gsymbol (gfc_gsym_root
,
1012 common_root
->n
.common
->name
);
1014 if (gsym
&& gfc_notification_std (GFC_STD_F2008
)
1015 && gsym
->type
== GSYM_COMMON
1016 && ((common_root
->n
.common
->binding_label
1017 && (!gsym
->binding_label
1018 || strcmp (common_root
->n
.common
->binding_label
,
1019 gsym
->binding_label
) != 0))
1020 || (!common_root
->n
.common
->binding_label
1021 && gsym
->binding_label
)))
1023 gfc_error ("In Fortran 2003 COMMON %qs block at %L is a global "
1024 "identifier and must thus have the same binding name "
1025 "as the same-named COMMON block at %L: %s vs %s",
1026 common_root
->n
.common
->name
, &common_root
->n
.common
->where
,
1028 common_root
->n
.common
->binding_label
1029 ? common_root
->n
.common
->binding_label
: "(blank)",
1030 gsym
->binding_label
? gsym
->binding_label
: "(blank)");
1034 if (gsym
&& gsym
->type
!= GSYM_COMMON
1035 && !common_root
->n
.common
->binding_label
)
1037 gfc_error ("COMMON block %qs at %L uses the same global identifier "
1039 common_root
->n
.common
->name
, &common_root
->n
.common
->where
,
1043 if (gsym
&& gsym
->type
!= GSYM_COMMON
)
1045 gfc_error ("Fortran 2008: COMMON block %qs with binding label at "
1046 "%L sharing the identifier with global non-COMMON-block "
1047 "entity at %L", common_root
->n
.common
->name
,
1048 &common_root
->n
.common
->where
, &gsym
->where
);
1053 gsym
= gfc_get_gsymbol (common_root
->n
.common
->name
);
1054 gsym
->type
= GSYM_COMMON
;
1055 gsym
->where
= common_root
->n
.common
->where
;
1061 if (common_root
->n
.common
->binding_label
)
1063 gsym
= gfc_find_gsymbol (gfc_gsym_root
,
1064 common_root
->n
.common
->binding_label
);
1065 if (gsym
&& gsym
->type
!= GSYM_COMMON
)
1067 gfc_error ("COMMON block at %L with binding label %qs uses the same "
1068 "global identifier as entity at %L",
1069 &common_root
->n
.common
->where
,
1070 common_root
->n
.common
->binding_label
, &gsym
->where
);
1075 gsym
= gfc_get_gsymbol (common_root
->n
.common
->binding_label
);
1076 gsym
->type
= GSYM_COMMON
;
1077 gsym
->where
= common_root
->n
.common
->where
;
1083 gfc_find_symbol (common_root
->name
, gfc_current_ns
, 0, &sym
);
1087 if (sym
->attr
.flavor
== FL_PARAMETER
)
1088 gfc_error ("COMMON block %qs at %L is used as PARAMETER at %L",
1089 sym
->name
, &common_root
->n
.common
->where
, &sym
->declared_at
);
1091 if (sym
->attr
.external
)
1092 gfc_error ("COMMON block %qs at %L can not have the EXTERNAL attribute",
1093 sym
->name
, &common_root
->n
.common
->where
);
1095 if (sym
->attr
.intrinsic
)
1096 gfc_error ("COMMON block %qs at %L is also an intrinsic procedure",
1097 sym
->name
, &common_root
->n
.common
->where
);
1098 else if (sym
->attr
.result
1099 || gfc_is_function_return_value (sym
, gfc_current_ns
))
1100 gfc_notify_std (GFC_STD_F2003
, "COMMON block %qs at %L "
1101 "that is also a function result", sym
->name
,
1102 &common_root
->n
.common
->where
);
1103 else if (sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.proc
!= PROC_INTERNAL
1104 && sym
->attr
.proc
!= PROC_ST_FUNCTION
)
1105 gfc_notify_std (GFC_STD_F2003
, "COMMON block %qs at %L "
1106 "that is also a global procedure", sym
->name
,
1107 &common_root
->n
.common
->where
);
1111 /* Resolve contained function types. Because contained functions can call one
1112 another, they have to be worked out before any of the contained procedures
1115 The good news is that if a function doesn't already have a type, the only
1116 way it can get one is through an IMPLICIT type or a RESULT variable, because
1117 by definition contained functions are contained namespace they're contained
1118 in, not in a sibling or parent namespace. */
1121 resolve_contained_functions (gfc_namespace
*ns
)
1123 gfc_namespace
*child
;
1126 resolve_formal_arglists (ns
);
1128 for (child
= ns
->contained
; child
; child
= child
->sibling
)
1130 /* Resolve alternate entry points first. */
1131 resolve_entries (child
);
1133 /* Then check function return types. */
1134 resolve_contained_fntype (child
->proc_name
, child
);
1135 for (el
= child
->entries
; el
; el
= el
->next
)
1136 resolve_contained_fntype (el
->sym
, child
);
1142 /* A Parameterized Derived Type constructor must contain values for
1143 the PDT KIND parameters or they must have a default initializer.
1144 Go through the constructor picking out the KIND expressions,
1145 storing them in 'param_list' and then call gfc_get_pdt_instance
1146 to obtain the PDT instance. */
1148 static gfc_actual_arglist
*param_list
, *param_tail
, *param
;
1151 get_pdt_spec_expr (gfc_component
*c
, gfc_expr
*expr
)
1153 param
= gfc_get_actual_arglist ();
1155 param_list
= param_tail
= param
;
1158 param_tail
->next
= param
;
1159 param_tail
= param_tail
->next
;
1162 param_tail
->name
= c
->name
;
1164 param_tail
->expr
= gfc_copy_expr (expr
);
1165 else if (c
->initializer
)
1166 param_tail
->expr
= gfc_copy_expr (c
->initializer
);
1169 param_tail
->spec_type
= SPEC_ASSUMED
;
1170 if (c
->attr
.pdt_kind
)
1172 gfc_error ("The KIND parameter %qs in the PDT constructor "
1173 "at %C has no value", param
->name
);
1182 get_pdt_constructor (gfc_expr
*expr
, gfc_constructor
**constr
,
1183 gfc_symbol
*derived
)
1185 gfc_constructor
*cons
= NULL
;
1186 gfc_component
*comp
;
1189 if (expr
&& expr
->expr_type
== EXPR_STRUCTURE
)
1190 cons
= gfc_constructor_first (expr
->value
.constructor
);
1195 comp
= derived
->components
;
1197 for (; comp
&& cons
; comp
= comp
->next
, cons
= gfc_constructor_next (cons
))
1200 && cons
->expr
->expr_type
== EXPR_STRUCTURE
1201 && comp
->ts
.type
== BT_DERIVED
)
1203 t
= get_pdt_constructor (cons
->expr
, NULL
, comp
->ts
.u
.derived
);
1207 else if (comp
->ts
.type
== BT_DERIVED
)
1209 t
= get_pdt_constructor (NULL
, &cons
, comp
->ts
.u
.derived
);
1213 else if ((comp
->attr
.pdt_kind
|| comp
->attr
.pdt_len
)
1214 && derived
->attr
.pdt_template
)
1216 t
= get_pdt_spec_expr (comp
, cons
->expr
);
1225 static bool resolve_fl_derived0 (gfc_symbol
*sym
);
1226 static bool resolve_fl_struct (gfc_symbol
*sym
);
1229 /* Resolve all of the elements of a structure constructor and make sure that
1230 the types are correct. The 'init' flag indicates that the given
1231 constructor is an initializer. */
1234 resolve_structure_cons (gfc_expr
*expr
, int init
)
1236 gfc_constructor
*cons
;
1237 gfc_component
*comp
;
1243 if (expr
->ts
.type
== BT_DERIVED
|| expr
->ts
.type
== BT_UNION
)
1245 if (expr
->ts
.u
.derived
->attr
.flavor
== FL_DERIVED
)
1246 resolve_fl_derived0 (expr
->ts
.u
.derived
);
1248 resolve_fl_struct (expr
->ts
.u
.derived
);
1250 /* If this is a Parameterized Derived Type template, find the
1251 instance corresponding to the PDT kind parameters. */
1252 if (expr
->ts
.u
.derived
->attr
.pdt_template
)
1255 t
= get_pdt_constructor (expr
, NULL
, expr
->ts
.u
.derived
);
1258 gfc_get_pdt_instance (param_list
, &expr
->ts
.u
.derived
, NULL
);
1260 expr
->param_list
= gfc_copy_actual_arglist (param_list
);
1263 gfc_free_actual_arglist (param_list
);
1265 if (!expr
->ts
.u
.derived
->attr
.pdt_type
)
1270 cons
= gfc_constructor_first (expr
->value
.constructor
);
1272 /* A constructor may have references if it is the result of substituting a
1273 parameter variable. In this case we just pull out the component we
1276 comp
= expr
->ref
->u
.c
.sym
->components
;
1278 comp
= expr
->ts
.u
.derived
->components
;
1280 for (; comp
&& cons
; comp
= comp
->next
, cons
= gfc_constructor_next (cons
))
1287 /* Unions use an EXPR_NULL contrived expression to tell the translation
1288 phase to generate an initializer of the appropriate length.
1290 if (cons
->expr
->ts
.type
== BT_UNION
&& cons
->expr
->expr_type
== EXPR_NULL
)
1293 if (!gfc_resolve_expr (cons
->expr
))
1299 rank
= comp
->as
? comp
->as
->rank
: 0;
1300 if (comp
->ts
.type
== BT_CLASS
1301 && !comp
->ts
.u
.derived
->attr
.unlimited_polymorphic
1302 && CLASS_DATA (comp
)->as
)
1303 rank
= CLASS_DATA (comp
)->as
->rank
;
1305 if (cons
->expr
->expr_type
!= EXPR_NULL
&& rank
!= cons
->expr
->rank
1306 && (comp
->attr
.allocatable
|| cons
->expr
->rank
))
1308 gfc_error ("The rank of the element in the structure "
1309 "constructor at %L does not match that of the "
1310 "component (%d/%d)", &cons
->expr
->where
,
1311 cons
->expr
->rank
, rank
);
1315 /* If we don't have the right type, try to convert it. */
1317 if (!comp
->attr
.proc_pointer
&&
1318 !gfc_compare_types (&cons
->expr
->ts
, &comp
->ts
))
1320 if (strcmp (comp
->name
, "_extends") == 0)
1322 /* Can afford to be brutal with the _extends initializer.
1323 The derived type can get lost because it is PRIVATE
1324 but it is not usage constrained by the standard. */
1325 cons
->expr
->ts
= comp
->ts
;
1327 else if (comp
->attr
.pointer
&& cons
->expr
->ts
.type
!= BT_UNKNOWN
)
1329 gfc_error ("The element in the structure constructor at %L, "
1330 "for pointer component %qs, is %s but should be %s",
1331 &cons
->expr
->where
, comp
->name
,
1332 gfc_basic_typename (cons
->expr
->ts
.type
),
1333 gfc_basic_typename (comp
->ts
.type
));
1338 bool t2
= gfc_convert_type (cons
->expr
, &comp
->ts
, 1);
1344 /* For strings, the length of the constructor should be the same as
1345 the one of the structure, ensure this if the lengths are known at
1346 compile time and when we are dealing with PARAMETER or structure
1348 if (cons
->expr
->ts
.type
== BT_CHARACTER
&& comp
->ts
.u
.cl
1349 && comp
->ts
.u
.cl
->length
1350 && comp
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
1351 && cons
->expr
->ts
.u
.cl
&& cons
->expr
->ts
.u
.cl
->length
1352 && cons
->expr
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
1353 && cons
->expr
->rank
!= 0
1354 && mpz_cmp (cons
->expr
->ts
.u
.cl
->length
->value
.integer
,
1355 comp
->ts
.u
.cl
->length
->value
.integer
) != 0)
1357 if (cons
->expr
->expr_type
== EXPR_VARIABLE
1358 && cons
->expr
->symtree
->n
.sym
->attr
.flavor
== FL_PARAMETER
)
1360 /* Wrap the parameter in an array constructor (EXPR_ARRAY)
1361 to make use of the gfc_resolve_character_array_constructor
1362 machinery. The expression is later simplified away to
1363 an array of string literals. */
1364 gfc_expr
*para
= cons
->expr
;
1365 cons
->expr
= gfc_get_expr ();
1366 cons
->expr
->ts
= para
->ts
;
1367 cons
->expr
->where
= para
->where
;
1368 cons
->expr
->expr_type
= EXPR_ARRAY
;
1369 cons
->expr
->rank
= para
->rank
;
1370 cons
->expr
->shape
= gfc_copy_shape (para
->shape
, para
->rank
);
1371 gfc_constructor_append_expr (&cons
->expr
->value
.constructor
,
1372 para
, &cons
->expr
->where
);
1375 if (cons
->expr
->expr_type
== EXPR_ARRAY
)
1377 /* Rely on the cleanup of the namespace to deal correctly with
1378 the old charlen. (There was a block here that attempted to
1379 remove the charlen but broke the chain in so doing.) */
1380 cons
->expr
->ts
.u
.cl
= gfc_new_charlen (gfc_current_ns
, NULL
);
1381 cons
->expr
->ts
.u
.cl
->length_from_typespec
= true;
1382 cons
->expr
->ts
.u
.cl
->length
= gfc_copy_expr (comp
->ts
.u
.cl
->length
);
1383 gfc_resolve_character_array_constructor (cons
->expr
);
1387 if (cons
->expr
->expr_type
== EXPR_NULL
1388 && !(comp
->attr
.pointer
|| comp
->attr
.allocatable
1389 || comp
->attr
.proc_pointer
|| comp
->ts
.f90_type
== BT_VOID
1390 || (comp
->ts
.type
== BT_CLASS
1391 && (CLASS_DATA (comp
)->attr
.class_pointer
1392 || CLASS_DATA (comp
)->attr
.allocatable
))))
1395 gfc_error ("The NULL in the structure constructor at %L is "
1396 "being applied to component %qs, which is neither "
1397 "a POINTER nor ALLOCATABLE", &cons
->expr
->where
,
1401 if (comp
->attr
.proc_pointer
&& comp
->ts
.interface
)
1403 /* Check procedure pointer interface. */
1404 gfc_symbol
*s2
= NULL
;
1409 c2
= gfc_get_proc_ptr_comp (cons
->expr
);
1412 s2
= c2
->ts
.interface
;
1415 else if (cons
->expr
->expr_type
== EXPR_FUNCTION
)
1417 s2
= cons
->expr
->symtree
->n
.sym
->result
;
1418 name
= cons
->expr
->symtree
->n
.sym
->result
->name
;
1420 else if (cons
->expr
->expr_type
!= EXPR_NULL
)
1422 s2
= cons
->expr
->symtree
->n
.sym
;
1423 name
= cons
->expr
->symtree
->n
.sym
->name
;
1426 if (s2
&& !gfc_compare_interfaces (comp
->ts
.interface
, s2
, name
, 0, 1,
1427 err
, sizeof (err
), NULL
, NULL
))
1429 gfc_error_opt (OPT_Wargument_mismatch
,
1430 "Interface mismatch for procedure-pointer "
1431 "component %qs in structure constructor at %L:"
1432 " %s", comp
->name
, &cons
->expr
->where
, err
);
1437 if (!comp
->attr
.pointer
|| comp
->attr
.proc_pointer
1438 || cons
->expr
->expr_type
== EXPR_NULL
)
1441 a
= gfc_expr_attr (cons
->expr
);
1443 if (!a
.pointer
&& !a
.target
)
1446 gfc_error ("The element in the structure constructor at %L, "
1447 "for pointer component %qs should be a POINTER or "
1448 "a TARGET", &cons
->expr
->where
, comp
->name
);
1453 /* F08:C461. Additional checks for pointer initialization. */
1457 gfc_error ("Pointer initialization target at %L "
1458 "must not be ALLOCATABLE", &cons
->expr
->where
);
1463 gfc_error ("Pointer initialization target at %L "
1464 "must have the SAVE attribute", &cons
->expr
->where
);
1468 /* F2003, C1272 (3). */
1469 bool impure
= cons
->expr
->expr_type
== EXPR_VARIABLE
1470 && (gfc_impure_variable (cons
->expr
->symtree
->n
.sym
)
1471 || gfc_is_coindexed (cons
->expr
));
1472 if (impure
&& gfc_pure (NULL
))
1475 gfc_error ("Invalid expression in the structure constructor for "
1476 "pointer component %qs at %L in PURE procedure",
1477 comp
->name
, &cons
->expr
->where
);
1481 gfc_unset_implicit_pure (NULL
);
1488 /****************** Expression name resolution ******************/
1490 /* Returns 0 if a symbol was not declared with a type or
1491 attribute declaration statement, nonzero otherwise. */
1494 was_declared (gfc_symbol
*sym
)
1500 if (!a
.implicit_type
&& sym
->ts
.type
!= BT_UNKNOWN
)
1503 if (a
.allocatable
|| a
.dimension
|| a
.dummy
|| a
.external
|| a
.intrinsic
1504 || a
.optional
|| a
.pointer
|| a
.save
|| a
.target
|| a
.volatile_
1505 || a
.value
|| a
.access
!= ACCESS_UNKNOWN
|| a
.intent
!= INTENT_UNKNOWN
1506 || a
.asynchronous
|| a
.codimension
)
1513 /* Determine if a symbol is generic or not. */
1516 generic_sym (gfc_symbol
*sym
)
1520 if (sym
->attr
.generic
||
1521 (sym
->attr
.intrinsic
&& gfc_generic_intrinsic (sym
->name
)))
1524 if (was_declared (sym
) || sym
->ns
->parent
== NULL
)
1527 gfc_find_symbol (sym
->name
, sym
->ns
->parent
, 1, &s
);
1534 return generic_sym (s
);
1541 /* Determine if a symbol is specific or not. */
1544 specific_sym (gfc_symbol
*sym
)
1548 if (sym
->attr
.if_source
== IFSRC_IFBODY
1549 || sym
->attr
.proc
== PROC_MODULE
1550 || sym
->attr
.proc
== PROC_INTERNAL
1551 || sym
->attr
.proc
== PROC_ST_FUNCTION
1552 || (sym
->attr
.intrinsic
&& gfc_specific_intrinsic (sym
->name
))
1553 || sym
->attr
.external
)
1556 if (was_declared (sym
) || sym
->ns
->parent
== NULL
)
1559 gfc_find_symbol (sym
->name
, sym
->ns
->parent
, 1, &s
);
1561 return (s
== NULL
) ? 0 : specific_sym (s
);
1565 /* Figure out if the procedure is specific, generic or unknown. */
1568 { PTYPE_GENERIC
= 1, PTYPE_SPECIFIC
, PTYPE_UNKNOWN
};
1571 procedure_kind (gfc_symbol
*sym
)
1573 if (generic_sym (sym
))
1574 return PTYPE_GENERIC
;
1576 if (specific_sym (sym
))
1577 return PTYPE_SPECIFIC
;
1579 return PTYPE_UNKNOWN
;
1582 /* Check references to assumed size arrays. The flag need_full_assumed_size
1583 is nonzero when matching actual arguments. */
1585 static int need_full_assumed_size
= 0;
1588 check_assumed_size_reference (gfc_symbol
*sym
, gfc_expr
*e
)
1590 if (need_full_assumed_size
|| !(sym
->as
&& sym
->as
->type
== AS_ASSUMED_SIZE
))
1593 /* FIXME: The comparison "e->ref->u.ar.type == AR_FULL" is wrong.
1594 What should it be? */
1595 if (e
->ref
&& (e
->ref
->u
.ar
.end
[e
->ref
->u
.ar
.as
->rank
- 1] == NULL
)
1596 && (e
->ref
->u
.ar
.as
->type
== AS_ASSUMED_SIZE
)
1597 && (e
->ref
->u
.ar
.type
== AR_FULL
))
1599 gfc_error ("The upper bound in the last dimension must "
1600 "appear in the reference to the assumed size "
1601 "array %qs at %L", sym
->name
, &e
->where
);
1608 /* Look for bad assumed size array references in argument expressions
1609 of elemental and array valued intrinsic procedures. Since this is
1610 called from procedure resolution functions, it only recurses at
1614 resolve_assumed_size_actual (gfc_expr
*e
)
1619 switch (e
->expr_type
)
1622 if (e
->symtree
&& check_assumed_size_reference (e
->symtree
->n
.sym
, e
))
1627 if (resolve_assumed_size_actual (e
->value
.op
.op1
)
1628 || resolve_assumed_size_actual (e
->value
.op
.op2
))
1639 /* Check a generic procedure, passed as an actual argument, to see if
1640 there is a matching specific name. If none, it is an error, and if
1641 more than one, the reference is ambiguous. */
1643 count_specific_procs (gfc_expr
*e
)
1650 sym
= e
->symtree
->n
.sym
;
1652 for (p
= sym
->generic
; p
; p
= p
->next
)
1653 if (strcmp (sym
->name
, p
->sym
->name
) == 0)
1655 e
->symtree
= gfc_find_symtree (p
->sym
->ns
->sym_root
,
1661 gfc_error ("%qs at %L is ambiguous", e
->symtree
->n
.sym
->name
,
1665 gfc_error ("GENERIC procedure %qs is not allowed as an actual "
1666 "argument at %L", sym
->name
, &e
->where
);
1672 /* See if a call to sym could possibly be a not allowed RECURSION because of
1673 a missing RECURSIVE declaration. This means that either sym is the current
1674 context itself, or sym is the parent of a contained procedure calling its
1675 non-RECURSIVE containing procedure.
1676 This also works if sym is an ENTRY. */
1679 is_illegal_recursion (gfc_symbol
* sym
, gfc_namespace
* context
)
1681 gfc_symbol
* proc_sym
;
1682 gfc_symbol
* context_proc
;
1683 gfc_namespace
* real_context
;
1685 if (sym
->attr
.flavor
== FL_PROGRAM
1686 || gfc_fl_struct (sym
->attr
.flavor
))
1689 gcc_assert (sym
->attr
.flavor
== FL_PROCEDURE
);
1691 /* If we've got an ENTRY, find real procedure. */
1692 if (sym
->attr
.entry
&& sym
->ns
->entries
)
1693 proc_sym
= sym
->ns
->entries
->sym
;
1697 /* If sym is RECURSIVE, all is well of course. */
1698 if (proc_sym
->attr
.recursive
|| flag_recursive
)
1701 /* Find the context procedure's "real" symbol if it has entries.
1702 We look for a procedure symbol, so recurse on the parents if we don't
1703 find one (like in case of a BLOCK construct). */
1704 for (real_context
= context
; ; real_context
= real_context
->parent
)
1706 /* We should find something, eventually! */
1707 gcc_assert (real_context
);
1709 context_proc
= (real_context
->entries
? real_context
->entries
->sym
1710 : real_context
->proc_name
);
1712 /* In some special cases, there may not be a proc_name, like for this
1714 real(bad_kind()) function foo () ...
1715 when checking the call to bad_kind ().
1716 In these cases, we simply return here and assume that the
1721 if (context_proc
->attr
.flavor
!= FL_LABEL
)
1725 /* A call from sym's body to itself is recursion, of course. */
1726 if (context_proc
== proc_sym
)
1729 /* The same is true if context is a contained procedure and sym the
1731 if (context_proc
->attr
.contained
)
1733 gfc_symbol
* parent_proc
;
1735 gcc_assert (context
->parent
);
1736 parent_proc
= (context
->parent
->entries
? context
->parent
->entries
->sym
1737 : context
->parent
->proc_name
);
1739 if (parent_proc
== proc_sym
)
1747 /* Resolve an intrinsic procedure: Set its function/subroutine attribute,
1748 its typespec and formal argument list. */
1751 gfc_resolve_intrinsic (gfc_symbol
*sym
, locus
*loc
)
1753 gfc_intrinsic_sym
* isym
= NULL
;
1759 /* Already resolved. */
1760 if (sym
->from_intmod
&& sym
->ts
.type
!= BT_UNKNOWN
)
1763 /* We already know this one is an intrinsic, so we don't call
1764 gfc_is_intrinsic for full checking but rather use gfc_find_function and
1765 gfc_find_subroutine directly to check whether it is a function or
1768 if (sym
->intmod_sym_id
&& sym
->attr
.subroutine
)
1770 gfc_isym_id id
= gfc_isym_id_by_intmod_sym (sym
);
1771 isym
= gfc_intrinsic_subroutine_by_id (id
);
1773 else if (sym
->intmod_sym_id
)
1775 gfc_isym_id id
= gfc_isym_id_by_intmod_sym (sym
);
1776 isym
= gfc_intrinsic_function_by_id (id
);
1778 else if (!sym
->attr
.subroutine
)
1779 isym
= gfc_find_function (sym
->name
);
1781 if (isym
&& !sym
->attr
.subroutine
)
1783 if (sym
->ts
.type
!= BT_UNKNOWN
&& warn_surprising
1784 && !sym
->attr
.implicit_type
)
1785 gfc_warning (OPT_Wsurprising
,
1786 "Type specified for intrinsic function %qs at %L is"
1787 " ignored", sym
->name
, &sym
->declared_at
);
1789 if (!sym
->attr
.function
&&
1790 !gfc_add_function(&sym
->attr
, sym
->name
, loc
))
1795 else if (isym
|| (isym
= gfc_find_subroutine (sym
->name
)))
1797 if (sym
->ts
.type
!= BT_UNKNOWN
&& !sym
->attr
.implicit_type
)
1799 gfc_error ("Intrinsic subroutine %qs at %L shall not have a type"
1800 " specifier", sym
->name
, &sym
->declared_at
);
1804 if (!sym
->attr
.subroutine
&&
1805 !gfc_add_subroutine(&sym
->attr
, sym
->name
, loc
))
1810 gfc_error ("%qs declared INTRINSIC at %L does not exist", sym
->name
,
1815 gfc_copy_formal_args_intr (sym
, isym
, NULL
);
1817 sym
->attr
.pure
= isym
->pure
;
1818 sym
->attr
.elemental
= isym
->elemental
;
1820 /* Check it is actually available in the standard settings. */
1821 if (!gfc_check_intrinsic_standard (isym
, &symstd
, false, sym
->declared_at
))
1823 gfc_error ("The intrinsic %qs declared INTRINSIC at %L is not "
1824 "available in the current standard settings but %s. Use "
1825 "an appropriate %<-std=*%> option or enable "
1826 "%<-fall-intrinsics%> in order to use it.",
1827 sym
->name
, &sym
->declared_at
, symstd
);
1835 /* Resolve a procedure expression, like passing it to a called procedure or as
1836 RHS for a procedure pointer assignment. */
1839 resolve_procedure_expression (gfc_expr
* expr
)
1843 if (expr
->expr_type
!= EXPR_VARIABLE
)
1845 gcc_assert (expr
->symtree
);
1847 sym
= expr
->symtree
->n
.sym
;
1849 if (sym
->attr
.intrinsic
)
1850 gfc_resolve_intrinsic (sym
, &expr
->where
);
1852 if (sym
->attr
.flavor
!= FL_PROCEDURE
1853 || (sym
->attr
.function
&& sym
->result
== sym
))
1856 /* A non-RECURSIVE procedure that is used as procedure expression within its
1857 own body is in danger of being called recursively. */
1858 if (is_illegal_recursion (sym
, gfc_current_ns
))
1859 gfc_warning (0, "Non-RECURSIVE procedure %qs at %L is possibly calling"
1860 " itself recursively. Declare it RECURSIVE or use"
1861 " %<-frecursive%>", sym
->name
, &expr
->where
);
1867 /* Resolve an actual argument list. Most of the time, this is just
1868 resolving the expressions in the list.
1869 The exception is that we sometimes have to decide whether arguments
1870 that look like procedure arguments are really simple variable
1874 resolve_actual_arglist (gfc_actual_arglist
*arg
, procedure_type ptype
,
1875 bool no_formal_args
)
1878 gfc_symtree
*parent_st
;
1880 gfc_component
*comp
;
1881 int save_need_full_assumed_size
;
1882 bool return_value
= false;
1883 bool actual_arg_sav
= actual_arg
, first_actual_arg_sav
= first_actual_arg
;
1886 first_actual_arg
= true;
1888 for (; arg
; arg
= arg
->next
)
1893 /* Check the label is a valid branching target. */
1896 if (arg
->label
->defined
== ST_LABEL_UNKNOWN
)
1898 gfc_error ("Label %d referenced at %L is never defined",
1899 arg
->label
->value
, &arg
->label
->where
);
1903 first_actual_arg
= false;
1907 if (e
->expr_type
== EXPR_VARIABLE
1908 && e
->symtree
->n
.sym
->attr
.generic
1910 && count_specific_procs (e
) != 1)
1913 if (e
->ts
.type
!= BT_PROCEDURE
)
1915 save_need_full_assumed_size
= need_full_assumed_size
;
1916 if (e
->expr_type
!= EXPR_VARIABLE
)
1917 need_full_assumed_size
= 0;
1918 if (!gfc_resolve_expr (e
))
1920 need_full_assumed_size
= save_need_full_assumed_size
;
1924 /* See if the expression node should really be a variable reference. */
1926 sym
= e
->symtree
->n
.sym
;
1928 if (sym
->attr
.flavor
== FL_PROCEDURE
1929 || sym
->attr
.intrinsic
1930 || sym
->attr
.external
)
1934 /* If a procedure is not already determined to be something else
1935 check if it is intrinsic. */
1936 if (gfc_is_intrinsic (sym
, sym
->attr
.subroutine
, e
->where
))
1937 sym
->attr
.intrinsic
= 1;
1939 if (sym
->attr
.proc
== PROC_ST_FUNCTION
)
1941 gfc_error ("Statement function %qs at %L is not allowed as an "
1942 "actual argument", sym
->name
, &e
->where
);
1945 actual_ok
= gfc_intrinsic_actual_ok (sym
->name
,
1946 sym
->attr
.subroutine
);
1947 if (sym
->attr
.intrinsic
&& actual_ok
== 0)
1949 gfc_error ("Intrinsic %qs at %L is not allowed as an "
1950 "actual argument", sym
->name
, &e
->where
);
1953 if (sym
->attr
.contained
&& !sym
->attr
.use_assoc
1954 && sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
)
1956 if (!gfc_notify_std (GFC_STD_F2008
, "Internal procedure %qs is"
1957 " used as actual argument at %L",
1958 sym
->name
, &e
->where
))
1962 if (sym
->attr
.elemental
&& !sym
->attr
.intrinsic
)
1964 gfc_error ("ELEMENTAL non-INTRINSIC procedure %qs is not "
1965 "allowed as an actual argument at %L", sym
->name
,
1969 /* Check if a generic interface has a specific procedure
1970 with the same name before emitting an error. */
1971 if (sym
->attr
.generic
&& count_specific_procs (e
) != 1)
1974 /* Just in case a specific was found for the expression. */
1975 sym
= e
->symtree
->n
.sym
;
1977 /* If the symbol is the function that names the current (or
1978 parent) scope, then we really have a variable reference. */
1980 if (gfc_is_function_return_value (sym
, sym
->ns
))
1983 /* If all else fails, see if we have a specific intrinsic. */
1984 if (sym
->ts
.type
== BT_UNKNOWN
&& sym
->attr
.intrinsic
)
1986 gfc_intrinsic_sym
*isym
;
1988 isym
= gfc_find_function (sym
->name
);
1989 if (isym
== NULL
|| !isym
->specific
)
1991 gfc_error ("Unable to find a specific INTRINSIC procedure "
1992 "for the reference %qs at %L", sym
->name
,
1997 sym
->attr
.intrinsic
= 1;
1998 sym
->attr
.function
= 1;
2001 if (!gfc_resolve_expr (e
))
2006 /* See if the name is a module procedure in a parent unit. */
2008 if (was_declared (sym
) || sym
->ns
->parent
== NULL
)
2011 if (gfc_find_sym_tree (sym
->name
, sym
->ns
->parent
, 1, &parent_st
))
2013 gfc_error ("Symbol %qs at %L is ambiguous", sym
->name
, &e
->where
);
2017 if (parent_st
== NULL
)
2020 sym
= parent_st
->n
.sym
;
2021 e
->symtree
= parent_st
; /* Point to the right thing. */
2023 if (sym
->attr
.flavor
== FL_PROCEDURE
2024 || sym
->attr
.intrinsic
2025 || sym
->attr
.external
)
2027 if (!gfc_resolve_expr (e
))
2033 e
->expr_type
= EXPR_VARIABLE
;
2035 if ((sym
->as
!= NULL
&& sym
->ts
.type
!= BT_CLASS
)
2036 || (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
2037 && CLASS_DATA (sym
)->as
))
2039 e
->rank
= sym
->ts
.type
== BT_CLASS
2040 ? CLASS_DATA (sym
)->as
->rank
: sym
->as
->rank
;
2041 e
->ref
= gfc_get_ref ();
2042 e
->ref
->type
= REF_ARRAY
;
2043 e
->ref
->u
.ar
.type
= AR_FULL
;
2044 e
->ref
->u
.ar
.as
= sym
->ts
.type
== BT_CLASS
2045 ? CLASS_DATA (sym
)->as
: sym
->as
;
2048 /* Expressions are assigned a default ts.type of BT_PROCEDURE in
2049 primary.c (match_actual_arg). If above code determines that it
2050 is a variable instead, it needs to be resolved as it was not
2051 done at the beginning of this function. */
2052 save_need_full_assumed_size
= need_full_assumed_size
;
2053 if (e
->expr_type
!= EXPR_VARIABLE
)
2054 need_full_assumed_size
= 0;
2055 if (!gfc_resolve_expr (e
))
2057 need_full_assumed_size
= save_need_full_assumed_size
;
2060 /* Check argument list functions %VAL, %LOC and %REF. There is
2061 nothing to do for %REF. */
2062 if (arg
->name
&& arg
->name
[0] == '%')
2064 if (strcmp ("%VAL", arg
->name
) == 0)
2066 if (e
->ts
.type
== BT_CHARACTER
|| e
->ts
.type
== BT_DERIVED
)
2068 gfc_error ("By-value argument at %L is not of numeric "
2075 gfc_error ("By-value argument at %L cannot be an array or "
2076 "an array section", &e
->where
);
2080 /* Intrinsics are still PROC_UNKNOWN here. However,
2081 since same file external procedures are not resolvable
2082 in gfortran, it is a good deal easier to leave them to
2084 if (ptype
!= PROC_UNKNOWN
2085 && ptype
!= PROC_DUMMY
2086 && ptype
!= PROC_EXTERNAL
2087 && ptype
!= PROC_MODULE
)
2089 gfc_error ("By-value argument at %L is not allowed "
2090 "in this context", &e
->where
);
2095 /* Statement functions have already been excluded above. */
2096 else if (strcmp ("%LOC", arg
->name
) == 0
2097 && e
->ts
.type
== BT_PROCEDURE
)
2099 if (e
->symtree
->n
.sym
->attr
.proc
== PROC_INTERNAL
)
2101 gfc_error ("Passing internal procedure at %L by location "
2102 "not allowed", &e
->where
);
2108 comp
= gfc_get_proc_ptr_comp(e
);
2109 if (e
->expr_type
== EXPR_VARIABLE
2110 && comp
&& comp
->attr
.elemental
)
2112 gfc_error ("ELEMENTAL procedure pointer component %qs is not "
2113 "allowed as an actual argument at %L", comp
->name
,
2117 /* Fortran 2008, C1237. */
2118 if (e
->expr_type
== EXPR_VARIABLE
&& gfc_is_coindexed (e
)
2119 && gfc_has_ultimate_pointer (e
))
2121 gfc_error ("Coindexed actual argument at %L with ultimate pointer "
2122 "component", &e
->where
);
2126 first_actual_arg
= false;
2129 return_value
= true;
2132 actual_arg
= actual_arg_sav
;
2133 first_actual_arg
= first_actual_arg_sav
;
2135 return return_value
;
2139 /* Do the checks of the actual argument list that are specific to elemental
2140 procedures. If called with c == NULL, we have a function, otherwise if
2141 expr == NULL, we have a subroutine. */
2144 resolve_elemental_actual (gfc_expr
*expr
, gfc_code
*c
)
2146 gfc_actual_arglist
*arg0
;
2147 gfc_actual_arglist
*arg
;
2148 gfc_symbol
*esym
= NULL
;
2149 gfc_intrinsic_sym
*isym
= NULL
;
2151 gfc_intrinsic_arg
*iformal
= NULL
;
2152 gfc_formal_arglist
*eformal
= NULL
;
2153 bool formal_optional
= false;
2154 bool set_by_optional
= false;
2158 /* Is this an elemental procedure? */
2159 if (expr
&& expr
->value
.function
.actual
!= NULL
)
2161 if (expr
->value
.function
.esym
!= NULL
2162 && expr
->value
.function
.esym
->attr
.elemental
)
2164 arg0
= expr
->value
.function
.actual
;
2165 esym
= expr
->value
.function
.esym
;
2167 else if (expr
->value
.function
.isym
!= NULL
2168 && expr
->value
.function
.isym
->elemental
)
2170 arg0
= expr
->value
.function
.actual
;
2171 isym
= expr
->value
.function
.isym
;
2176 else if (c
&& c
->ext
.actual
!= NULL
)
2178 arg0
= c
->ext
.actual
;
2180 if (c
->resolved_sym
)
2181 esym
= c
->resolved_sym
;
2183 esym
= c
->symtree
->n
.sym
;
2186 if (!esym
->attr
.elemental
)
2192 /* The rank of an elemental is the rank of its array argument(s). */
2193 for (arg
= arg0
; arg
; arg
= arg
->next
)
2195 if (arg
->expr
!= NULL
&& arg
->expr
->rank
!= 0)
2197 rank
= arg
->expr
->rank
;
2198 if (arg
->expr
->expr_type
== EXPR_VARIABLE
2199 && arg
->expr
->symtree
->n
.sym
->attr
.optional
)
2200 set_by_optional
= true;
2202 /* Function specific; set the result rank and shape. */
2206 if (!expr
->shape
&& arg
->expr
->shape
)
2208 expr
->shape
= gfc_get_shape (rank
);
2209 for (i
= 0; i
< rank
; i
++)
2210 mpz_init_set (expr
->shape
[i
], arg
->expr
->shape
[i
]);
2217 /* If it is an array, it shall not be supplied as an actual argument
2218 to an elemental procedure unless an array of the same rank is supplied
2219 as an actual argument corresponding to a nonoptional dummy argument of
2220 that elemental procedure(12.4.1.5). */
2221 formal_optional
= false;
2223 iformal
= isym
->formal
;
2225 eformal
= esym
->formal
;
2227 for (arg
= arg0
; arg
; arg
= arg
->next
)
2231 if (eformal
->sym
&& eformal
->sym
->attr
.optional
)
2232 formal_optional
= true;
2233 eformal
= eformal
->next
;
2235 else if (isym
&& iformal
)
2237 if (iformal
->optional
)
2238 formal_optional
= true;
2239 iformal
= iformal
->next
;
2242 formal_optional
= true;
2244 if (pedantic
&& arg
->expr
!= NULL
2245 && arg
->expr
->expr_type
== EXPR_VARIABLE
2246 && arg
->expr
->symtree
->n
.sym
->attr
.optional
2249 && (set_by_optional
|| arg
->expr
->rank
!= rank
)
2250 && !(isym
&& isym
->id
== GFC_ISYM_CONVERSION
))
2252 gfc_warning (OPT_Wpedantic
,
2253 "%qs at %L is an array and OPTIONAL; IF IT IS "
2254 "MISSING, it cannot be the actual argument of an "
2255 "ELEMENTAL procedure unless there is a non-optional "
2256 "argument with the same rank (12.4.1.5)",
2257 arg
->expr
->symtree
->n
.sym
->name
, &arg
->expr
->where
);
2261 for (arg
= arg0
; arg
; arg
= arg
->next
)
2263 if (arg
->expr
== NULL
|| arg
->expr
->rank
== 0)
2266 /* Being elemental, the last upper bound of an assumed size array
2267 argument must be present. */
2268 if (resolve_assumed_size_actual (arg
->expr
))
2271 /* Elemental procedure's array actual arguments must conform. */
2274 if (!gfc_check_conformance (arg
->expr
, e
, "elemental procedure"))
2281 /* INTENT(OUT) is only allowed for subroutines; if any actual argument
2282 is an array, the intent inout/out variable needs to be also an array. */
2283 if (rank
> 0 && esym
&& expr
== NULL
)
2284 for (eformal
= esym
->formal
, arg
= arg0
; arg
&& eformal
;
2285 arg
= arg
->next
, eformal
= eformal
->next
)
2286 if ((eformal
->sym
->attr
.intent
== INTENT_OUT
2287 || eformal
->sym
->attr
.intent
== INTENT_INOUT
)
2288 && arg
->expr
&& arg
->expr
->rank
== 0)
2290 gfc_error ("Actual argument at %L for INTENT(%s) dummy %qs of "
2291 "ELEMENTAL subroutine %qs is a scalar, but another "
2292 "actual argument is an array", &arg
->expr
->where
,
2293 (eformal
->sym
->attr
.intent
== INTENT_OUT
) ? "OUT"
2294 : "INOUT", eformal
->sym
->name
, esym
->name
);
2301 /* This function does the checking of references to global procedures
2302 as defined in sections 18.1 and 14.1, respectively, of the Fortran
2303 77 and 95 standards. It checks for a gsymbol for the name, making
2304 one if it does not already exist. If it already exists, then the
2305 reference being resolved must correspond to the type of gsymbol.
2306 Otherwise, the new symbol is equipped with the attributes of the
2307 reference. The corresponding code that is called in creating
2308 global entities is parse.c.
2310 In addition, for all but -std=legacy, the gsymbols are used to
2311 check the interfaces of external procedures from the same file.
2312 The namespace of the gsymbol is resolved and then, once this is
2313 done the interface is checked. */
2317 not_in_recursive (gfc_symbol
*sym
, gfc_namespace
*gsym_ns
)
2319 if (!gsym_ns
->proc_name
->attr
.recursive
)
2322 if (sym
->ns
== gsym_ns
)
2325 if (sym
->ns
->parent
&& sym
->ns
->parent
== gsym_ns
)
2332 not_entry_self_reference (gfc_symbol
*sym
, gfc_namespace
*gsym_ns
)
2334 if (gsym_ns
->entries
)
2336 gfc_entry_list
*entry
= gsym_ns
->entries
;
2338 for (; entry
; entry
= entry
->next
)
2340 if (strcmp (sym
->name
, entry
->sym
->name
) == 0)
2342 if (strcmp (gsym_ns
->proc_name
->name
,
2343 sym
->ns
->proc_name
->name
) == 0)
2347 && strcmp (gsym_ns
->proc_name
->name
,
2348 sym
->ns
->parent
->proc_name
->name
) == 0)
2357 /* Check for the requirement of an explicit interface. F08:12.4.2.2. */
2360 gfc_explicit_interface_required (gfc_symbol
*sym
, char *errmsg
, int err_len
)
2362 gfc_formal_arglist
*arg
= gfc_sym_get_dummy_args (sym
);
2364 for ( ; arg
; arg
= arg
->next
)
2369 if (arg
->sym
->attr
.allocatable
) /* (2a) */
2371 strncpy (errmsg
, _("allocatable argument"), err_len
);
2374 else if (arg
->sym
->attr
.asynchronous
)
2376 strncpy (errmsg
, _("asynchronous argument"), err_len
);
2379 else if (arg
->sym
->attr
.optional
)
2381 strncpy (errmsg
, _("optional argument"), err_len
);
2384 else if (arg
->sym
->attr
.pointer
)
2386 strncpy (errmsg
, _("pointer argument"), err_len
);
2389 else if (arg
->sym
->attr
.target
)
2391 strncpy (errmsg
, _("target argument"), err_len
);
2394 else if (arg
->sym
->attr
.value
)
2396 strncpy (errmsg
, _("value argument"), err_len
);
2399 else if (arg
->sym
->attr
.volatile_
)
2401 strncpy (errmsg
, _("volatile argument"), err_len
);
2404 else if (arg
->sym
->as
&& arg
->sym
->as
->type
== AS_ASSUMED_SHAPE
) /* (2b) */
2406 strncpy (errmsg
, _("assumed-shape argument"), err_len
);
2409 else if (arg
->sym
->as
&& arg
->sym
->as
->type
== AS_ASSUMED_RANK
) /* TS 29113, 6.2. */
2411 strncpy (errmsg
, _("assumed-rank argument"), err_len
);
2414 else if (arg
->sym
->attr
.codimension
) /* (2c) */
2416 strncpy (errmsg
, _("coarray argument"), err_len
);
2419 else if (false) /* (2d) TODO: parametrized derived type */
2421 strncpy (errmsg
, _("parametrized derived type argument"), err_len
);
2424 else if (arg
->sym
->ts
.type
== BT_CLASS
) /* (2e) */
2426 strncpy (errmsg
, _("polymorphic argument"), err_len
);
2429 else if (arg
->sym
->attr
.ext_attr
& (1 << EXT_ATTR_NO_ARG_CHECK
))
2431 strncpy (errmsg
, _("NO_ARG_CHECK attribute"), err_len
);
2434 else if (arg
->sym
->ts
.type
== BT_ASSUMED
)
2436 /* As assumed-type is unlimited polymorphic (cf. above).
2437 See also TS 29113, Note 6.1. */
2438 strncpy (errmsg
, _("assumed-type argument"), err_len
);
2443 if (sym
->attr
.function
)
2445 gfc_symbol
*res
= sym
->result
? sym
->result
: sym
;
2447 if (res
->attr
.dimension
) /* (3a) */
2449 strncpy (errmsg
, _("array result"), err_len
);
2452 else if (res
->attr
.pointer
|| res
->attr
.allocatable
) /* (3b) */
2454 strncpy (errmsg
, _("pointer or allocatable result"), err_len
);
2457 else if (res
->ts
.type
== BT_CHARACTER
&& res
->ts
.u
.cl
2458 && res
->ts
.u
.cl
->length
2459 && res
->ts
.u
.cl
->length
->expr_type
!= EXPR_CONSTANT
) /* (3c) */
2461 strncpy (errmsg
, _("result with non-constant character length"), err_len
);
2466 if (sym
->attr
.elemental
&& !sym
->attr
.intrinsic
) /* (4) */
2468 strncpy (errmsg
, _("elemental procedure"), err_len
);
2471 else if (sym
->attr
.is_bind_c
) /* (5) */
2473 strncpy (errmsg
, _("bind(c) procedure"), err_len
);
2482 resolve_global_procedure (gfc_symbol
*sym
, locus
*where
,
2483 gfc_actual_arglist
**actual
, int sub
)
2487 enum gfc_symbol_type type
;
2490 type
= sub
? GSYM_SUBROUTINE
: GSYM_FUNCTION
;
2492 gsym
= gfc_get_gsymbol (sym
->binding_label
? sym
->binding_label
: sym
->name
);
2494 if ((gsym
->type
!= GSYM_UNKNOWN
&& gsym
->type
!= type
))
2495 gfc_global_used (gsym
, where
);
2497 if ((sym
->attr
.if_source
== IFSRC_UNKNOWN
2498 || sym
->attr
.if_source
== IFSRC_IFBODY
)
2499 && gsym
->type
!= GSYM_UNKNOWN
2500 && !gsym
->binding_label
2502 && gsym
->ns
->resolved
!= -1
2503 && gsym
->ns
->proc_name
2504 && not_in_recursive (sym
, gsym
->ns
)
2505 && not_entry_self_reference (sym
, gsym
->ns
))
2507 gfc_symbol
*def_sym
;
2509 /* Resolve the gsymbol namespace if needed. */
2510 if (!gsym
->ns
->resolved
)
2512 gfc_symbol
*old_dt_list
;
2514 /* Stash away derived types so that the backend_decls do not
2516 old_dt_list
= gfc_derived_types
;
2517 gfc_derived_types
= NULL
;
2519 gfc_resolve (gsym
->ns
);
2521 /* Store the new derived types with the global namespace. */
2522 if (gfc_derived_types
)
2523 gsym
->ns
->derived_types
= gfc_derived_types
;
2525 /* Restore the derived types of this namespace. */
2526 gfc_derived_types
= old_dt_list
;
2529 /* Make sure that translation for the gsymbol occurs before
2530 the procedure currently being resolved. */
2531 ns
= gfc_global_ns_list
;
2532 for (; ns
&& ns
!= gsym
->ns
; ns
= ns
->sibling
)
2534 if (ns
->sibling
== gsym
->ns
)
2536 ns
->sibling
= gsym
->ns
->sibling
;
2537 gsym
->ns
->sibling
= gfc_global_ns_list
;
2538 gfc_global_ns_list
= gsym
->ns
;
2543 def_sym
= gsym
->ns
->proc_name
;
2545 /* This can happen if a binding name has been specified. */
2546 if (gsym
->binding_label
&& gsym
->sym_name
!= def_sym
->name
)
2547 gfc_find_symbol (gsym
->sym_name
, gsym
->ns
, 0, &def_sym
);
2549 if (def_sym
->attr
.entry_master
)
2551 gfc_entry_list
*entry
;
2552 for (entry
= gsym
->ns
->entries
; entry
; entry
= entry
->next
)
2553 if (strcmp (entry
->sym
->name
, sym
->name
) == 0)
2555 def_sym
= entry
->sym
;
2560 if (sym
->attr
.function
&& !gfc_compare_types (&sym
->ts
, &def_sym
->ts
))
2562 gfc_error ("Return type mismatch of function %qs at %L (%s/%s)",
2563 sym
->name
, &sym
->declared_at
, gfc_typename (&sym
->ts
),
2564 gfc_typename (&def_sym
->ts
));
2568 if (sym
->attr
.if_source
== IFSRC_UNKNOWN
2569 && gfc_explicit_interface_required (def_sym
, reason
, sizeof(reason
)))
2571 gfc_error ("Explicit interface required for %qs at %L: %s",
2572 sym
->name
, &sym
->declared_at
, reason
);
2576 if (!pedantic
&& (gfc_option
.allow_std
& GFC_STD_GNU
))
2577 /* Turn erros into warnings with -std=gnu and -std=legacy. */
2578 gfc_errors_to_warnings (true);
2580 if (!gfc_compare_interfaces (sym
, def_sym
, sym
->name
, 0, 1,
2581 reason
, sizeof(reason
), NULL
, NULL
))
2583 gfc_error_opt (OPT_Wargument_mismatch
,
2584 "Interface mismatch in global procedure %qs at %L:"
2585 " %s", sym
->name
, &sym
->declared_at
, reason
);
2590 || ((gfc_option
.warn_std
& GFC_STD_LEGACY
)
2591 && !(gfc_option
.warn_std
& GFC_STD_GNU
)))
2592 gfc_errors_to_warnings (true);
2594 if (sym
->attr
.if_source
!= IFSRC_IFBODY
)
2595 gfc_procedure_use (def_sym
, actual
, where
);
2599 gfc_errors_to_warnings (false);
2601 if (gsym
->type
== GSYM_UNKNOWN
)
2604 gsym
->where
= *where
;
2611 /************* Function resolution *************/
2613 /* Resolve a function call known to be generic.
2614 Section 14.1.2.4.1. */
2617 resolve_generic_f0 (gfc_expr
*expr
, gfc_symbol
*sym
)
2621 if (sym
->attr
.generic
)
2623 s
= gfc_search_interface (sym
->generic
, 0, &expr
->value
.function
.actual
);
2626 expr
->value
.function
.name
= s
->name
;
2627 expr
->value
.function
.esym
= s
;
2629 if (s
->ts
.type
!= BT_UNKNOWN
)
2631 else if (s
->result
!= NULL
&& s
->result
->ts
.type
!= BT_UNKNOWN
)
2632 expr
->ts
= s
->result
->ts
;
2635 expr
->rank
= s
->as
->rank
;
2636 else if (s
->result
!= NULL
&& s
->result
->as
!= NULL
)
2637 expr
->rank
= s
->result
->as
->rank
;
2639 gfc_set_sym_referenced (expr
->value
.function
.esym
);
2644 /* TODO: Need to search for elemental references in generic
2648 if (sym
->attr
.intrinsic
)
2649 return gfc_intrinsic_func_interface (expr
, 0);
2656 resolve_generic_f (gfc_expr
*expr
)
2660 gfc_interface
*intr
= NULL
;
2662 sym
= expr
->symtree
->n
.sym
;
2666 m
= resolve_generic_f0 (expr
, sym
);
2669 else if (m
== MATCH_ERROR
)
2674 for (intr
= sym
->generic
; intr
; intr
= intr
->next
)
2675 if (gfc_fl_struct (intr
->sym
->attr
.flavor
))
2678 if (sym
->ns
->parent
== NULL
)
2680 gfc_find_symbol (sym
->name
, sym
->ns
->parent
, 1, &sym
);
2684 if (!generic_sym (sym
))
2688 /* Last ditch attempt. See if the reference is to an intrinsic
2689 that possesses a matching interface. 14.1.2.4 */
2690 if (sym
&& !intr
&& !gfc_is_intrinsic (sym
, 0, expr
->where
))
2692 if (gfc_init_expr_flag
)
2693 gfc_error ("Function %qs in initialization expression at %L "
2694 "must be an intrinsic function",
2695 expr
->symtree
->n
.sym
->name
, &expr
->where
);
2697 gfc_error ("There is no specific function for the generic %qs "
2698 "at %L", expr
->symtree
->n
.sym
->name
, &expr
->where
);
2704 if (!gfc_convert_to_structure_constructor (expr
, intr
->sym
, NULL
,
2707 if (!gfc_use_derived (expr
->ts
.u
.derived
))
2709 return resolve_structure_cons (expr
, 0);
2712 m
= gfc_intrinsic_func_interface (expr
, 0);
2717 gfc_error ("Generic function %qs at %L is not consistent with a "
2718 "specific intrinsic interface", expr
->symtree
->n
.sym
->name
,
2725 /* Resolve a function call known to be specific. */
2728 resolve_specific_f0 (gfc_symbol
*sym
, gfc_expr
*expr
)
2732 if (sym
->attr
.external
|| sym
->attr
.if_source
== IFSRC_IFBODY
)
2734 if (sym
->attr
.dummy
)
2736 sym
->attr
.proc
= PROC_DUMMY
;
2740 sym
->attr
.proc
= PROC_EXTERNAL
;
2744 if (sym
->attr
.proc
== PROC_MODULE
2745 || sym
->attr
.proc
== PROC_ST_FUNCTION
2746 || sym
->attr
.proc
== PROC_INTERNAL
)
2749 if (sym
->attr
.intrinsic
)
2751 m
= gfc_intrinsic_func_interface (expr
, 1);
2755 gfc_error ("Function %qs at %L is INTRINSIC but is not compatible "
2756 "with an intrinsic", sym
->name
, &expr
->where
);
2764 gfc_procedure_use (sym
, &expr
->value
.function
.actual
, &expr
->where
);
2767 expr
->ts
= sym
->result
->ts
;
2770 expr
->value
.function
.name
= sym
->name
;
2771 expr
->value
.function
.esym
= sym
;
2772 /* Prevent crash when sym->ts.u.derived->components is not set due to previous
2774 if (sym
->ts
.type
== BT_CLASS
&& !CLASS_DATA (sym
))
2776 if (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
)->as
)
2777 expr
->rank
= CLASS_DATA (sym
)->as
->rank
;
2778 else if (sym
->as
!= NULL
)
2779 expr
->rank
= sym
->as
->rank
;
2786 resolve_specific_f (gfc_expr
*expr
)
2791 sym
= expr
->symtree
->n
.sym
;
2795 m
= resolve_specific_f0 (sym
, expr
);
2798 if (m
== MATCH_ERROR
)
2801 if (sym
->ns
->parent
== NULL
)
2804 gfc_find_symbol (sym
->name
, sym
->ns
->parent
, 1, &sym
);
2810 gfc_error ("Unable to resolve the specific function %qs at %L",
2811 expr
->symtree
->n
.sym
->name
, &expr
->where
);
2816 /* Recursively append candidate SYM to CANDIDATES. Store the number of
2817 candidates in CANDIDATES_LEN. */
2820 lookup_function_fuzzy_find_candidates (gfc_symtree
*sym
,
2822 size_t &candidates_len
)
2828 if ((sym
->n
.sym
->ts
.type
!= BT_UNKNOWN
|| sym
->n
.sym
->attr
.external
)
2829 && sym
->n
.sym
->attr
.flavor
== FL_PROCEDURE
)
2830 vec_push (candidates
, candidates_len
, sym
->name
);
2834 lookup_function_fuzzy_find_candidates (p
, candidates
, candidates_len
);
2838 lookup_function_fuzzy_find_candidates (p
, candidates
, candidates_len
);
2842 /* Lookup function FN fuzzily, taking names in SYMROOT into account. */
2845 gfc_lookup_function_fuzzy (const char *fn
, gfc_symtree
*symroot
)
2847 char **candidates
= NULL
;
2848 size_t candidates_len
= 0;
2849 lookup_function_fuzzy_find_candidates (symroot
, candidates
, candidates_len
);
2850 return gfc_closest_fuzzy_match (fn
, candidates
);
2854 /* Resolve a procedure call not known to be generic nor specific. */
2857 resolve_unknown_f (gfc_expr
*expr
)
2862 sym
= expr
->symtree
->n
.sym
;
2864 if (sym
->attr
.dummy
)
2866 sym
->attr
.proc
= PROC_DUMMY
;
2867 expr
->value
.function
.name
= sym
->name
;
2871 /* See if we have an intrinsic function reference. */
2873 if (gfc_is_intrinsic (sym
, 0, expr
->where
))
2875 if (gfc_intrinsic_func_interface (expr
, 1) == MATCH_YES
)
2880 /* The reference is to an external name. */
2882 sym
->attr
.proc
= PROC_EXTERNAL
;
2883 expr
->value
.function
.name
= sym
->name
;
2884 expr
->value
.function
.esym
= expr
->symtree
->n
.sym
;
2886 if (sym
->as
!= NULL
)
2887 expr
->rank
= sym
->as
->rank
;
2889 /* Type of the expression is either the type of the symbol or the
2890 default type of the symbol. */
2893 gfc_procedure_use (sym
, &expr
->value
.function
.actual
, &expr
->where
);
2895 if (sym
->ts
.type
!= BT_UNKNOWN
)
2899 ts
= gfc_get_default_type (sym
->name
, sym
->ns
);
2901 if (ts
->type
== BT_UNKNOWN
)
2904 = gfc_lookup_function_fuzzy (sym
->name
, sym
->ns
->sym_root
);
2906 gfc_error ("Function %qs at %L has no IMPLICIT type"
2907 "; did you mean %qs?",
2908 sym
->name
, &expr
->where
, guessed
);
2910 gfc_error ("Function %qs at %L has no IMPLICIT type",
2911 sym
->name
, &expr
->where
);
2922 /* Return true, if the symbol is an external procedure. */
2924 is_external_proc (gfc_symbol
*sym
)
2926 if (!sym
->attr
.dummy
&& !sym
->attr
.contained
2927 && !gfc_is_intrinsic (sym
, sym
->attr
.subroutine
, sym
->declared_at
)
2928 && sym
->attr
.proc
!= PROC_ST_FUNCTION
2929 && !sym
->attr
.proc_pointer
2930 && !sym
->attr
.use_assoc
2938 /* Figure out if a function reference is pure or not. Also set the name
2939 of the function for a potential error message. Return nonzero if the
2940 function is PURE, zero if not. */
2942 pure_stmt_function (gfc_expr
*, gfc_symbol
*);
2945 gfc_pure_function (gfc_expr
*e
, const char **name
)
2948 gfc_component
*comp
;
2952 if (e
->symtree
!= NULL
2953 && e
->symtree
->n
.sym
!= NULL
2954 && e
->symtree
->n
.sym
->attr
.proc
== PROC_ST_FUNCTION
)
2955 return pure_stmt_function (e
, e
->symtree
->n
.sym
);
2957 comp
= gfc_get_proc_ptr_comp (e
);
2960 pure
= gfc_pure (comp
->ts
.interface
);
2963 else if (e
->value
.function
.esym
)
2965 pure
= gfc_pure (e
->value
.function
.esym
);
2966 *name
= e
->value
.function
.esym
->name
;
2968 else if (e
->value
.function
.isym
)
2970 pure
= e
->value
.function
.isym
->pure
2971 || e
->value
.function
.isym
->elemental
;
2972 *name
= e
->value
.function
.isym
->name
;
2976 /* Implicit functions are not pure. */
2978 *name
= e
->value
.function
.name
;
2985 /* Check if the expression is a reference to an implicitly pure function. */
2988 gfc_implicit_pure_function (gfc_expr
*e
)
2990 gfc_component
*comp
= gfc_get_proc_ptr_comp (e
);
2992 return gfc_implicit_pure (comp
->ts
.interface
);
2993 else if (e
->value
.function
.esym
)
2994 return gfc_implicit_pure (e
->value
.function
.esym
);
3001 impure_stmt_fcn (gfc_expr
*e
, gfc_symbol
*sym
,
3002 int *f ATTRIBUTE_UNUSED
)
3006 /* Don't bother recursing into other statement functions
3007 since they will be checked individually for purity. */
3008 if (e
->expr_type
!= EXPR_FUNCTION
3010 || e
->symtree
->n
.sym
== sym
3011 || e
->symtree
->n
.sym
->attr
.proc
== PROC_ST_FUNCTION
)
3014 return gfc_pure_function (e
, &name
) ? false : true;
3019 pure_stmt_function (gfc_expr
*e
, gfc_symbol
*sym
)
3021 return gfc_traverse_expr (e
, sym
, impure_stmt_fcn
, 0) ? 0 : 1;
3025 /* Check if an impure function is allowed in the current context. */
3027 static bool check_pure_function (gfc_expr
*e
)
3029 const char *name
= NULL
;
3030 if (!gfc_pure_function (e
, &name
) && name
)
3034 gfc_error ("Reference to impure function %qs at %L inside a "
3035 "FORALL %s", name
, &e
->where
,
3036 forall_flag
== 2 ? "mask" : "block");
3039 else if (gfc_do_concurrent_flag
)
3041 gfc_error ("Reference to impure function %qs at %L inside a "
3042 "DO CONCURRENT %s", name
, &e
->where
,
3043 gfc_do_concurrent_flag
== 2 ? "mask" : "block");
3046 else if (gfc_pure (NULL
))
3048 gfc_error ("Reference to impure function %qs at %L "
3049 "within a PURE procedure", name
, &e
->where
);
3052 if (!gfc_implicit_pure_function (e
))
3053 gfc_unset_implicit_pure (NULL
);
3059 /* Update current procedure's array_outer_dependency flag, considering
3060 a call to procedure SYM. */
3063 update_current_proc_array_outer_dependency (gfc_symbol
*sym
)
3065 /* Check to see if this is a sibling function that has not yet
3067 gfc_namespace
*sibling
= gfc_current_ns
->sibling
;
3068 for (; sibling
; sibling
= sibling
->sibling
)
3070 if (sibling
->proc_name
== sym
)
3072 gfc_resolve (sibling
);
3077 /* If SYM has references to outer arrays, so has the procedure calling
3078 SYM. If SYM is a procedure pointer, we can assume the worst. */
3079 if ((sym
->attr
.array_outer_dependency
|| sym
->attr
.proc_pointer
)
3080 && gfc_current_ns
->proc_name
)
3081 gfc_current_ns
->proc_name
->attr
.array_outer_dependency
= 1;
3085 /* Resolve a function call, which means resolving the arguments, then figuring
3086 out which entity the name refers to. */
3089 resolve_function (gfc_expr
*expr
)
3091 gfc_actual_arglist
*arg
;
3095 procedure_type p
= PROC_INTRINSIC
;
3096 bool no_formal_args
;
3100 sym
= expr
->symtree
->n
.sym
;
3102 /* If this is a procedure pointer component, it has already been resolved. */
3103 if (gfc_is_proc_ptr_comp (expr
))
3106 /* Avoid re-resolving the arguments of caf_get, which can lead to inserting
3108 if (sym
&& sym
->attr
.intrinsic
3109 && (sym
->intmod_sym_id
== GFC_ISYM_CAF_GET
3110 || sym
->intmod_sym_id
== GFC_ISYM_CAF_SEND
))
3113 if (sym
&& sym
->attr
.intrinsic
3114 && !gfc_resolve_intrinsic (sym
, &expr
->where
))
3117 if (sym
&& (sym
->attr
.flavor
== FL_VARIABLE
|| sym
->attr
.subroutine
))
3119 gfc_error ("%qs at %L is not a function", sym
->name
, &expr
->where
);
3123 /* If this is a deferred TBP with an abstract interface (which may
3124 of course be referenced), expr->value.function.esym will be set. */
3125 if (sym
&& sym
->attr
.abstract
&& !expr
->value
.function
.esym
)
3127 gfc_error ("ABSTRACT INTERFACE %qs must not be referenced at %L",
3128 sym
->name
, &expr
->where
);
3132 /* If this is a deferred TBP with an abstract interface, its result
3133 cannot be an assumed length character (F2003: C418). */
3134 if (sym
&& sym
->attr
.abstract
&& sym
->attr
.function
3135 && sym
->result
->ts
.u
.cl
3136 && sym
->result
->ts
.u
.cl
->length
== NULL
3137 && !sym
->result
->ts
.deferred
)
3139 gfc_error ("ABSTRACT INTERFACE %qs at %L must not have an assumed "
3140 "character length result (F2008: C418)", sym
->name
,
3145 /* Switch off assumed size checking and do this again for certain kinds
3146 of procedure, once the procedure itself is resolved. */
3147 need_full_assumed_size
++;
3149 if (expr
->symtree
&& expr
->symtree
->n
.sym
)
3150 p
= expr
->symtree
->n
.sym
->attr
.proc
;
3152 if (expr
->value
.function
.isym
&& expr
->value
.function
.isym
->inquiry
)
3153 inquiry_argument
= true;
3154 no_formal_args
= sym
&& is_external_proc (sym
)
3155 && gfc_sym_get_dummy_args (sym
) == NULL
;
3157 if (!resolve_actual_arglist (expr
->value
.function
.actual
,
3160 inquiry_argument
= false;
3164 inquiry_argument
= false;
3166 /* Resume assumed_size checking. */
3167 need_full_assumed_size
--;
3169 /* If the procedure is external, check for usage. */
3170 if (sym
&& is_external_proc (sym
))
3171 resolve_global_procedure (sym
, &expr
->where
,
3172 &expr
->value
.function
.actual
, 0);
3174 if (sym
&& sym
->ts
.type
== BT_CHARACTER
3176 && sym
->ts
.u
.cl
->length
== NULL
3178 && !sym
->ts
.deferred
3179 && expr
->value
.function
.esym
== NULL
3180 && !sym
->attr
.contained
)
3182 /* Internal procedures are taken care of in resolve_contained_fntype. */
3183 gfc_error ("Function %qs is declared CHARACTER(*) and cannot "
3184 "be used at %L since it is not a dummy argument",
3185 sym
->name
, &expr
->where
);
3189 /* See if function is already resolved. */
3191 if (expr
->value
.function
.name
!= NULL
3192 || expr
->value
.function
.isym
!= NULL
)
3194 if (expr
->ts
.type
== BT_UNKNOWN
)
3200 /* Apply the rules of section 14.1.2. */
3202 switch (procedure_kind (sym
))
3205 t
= resolve_generic_f (expr
);
3208 case PTYPE_SPECIFIC
:
3209 t
= resolve_specific_f (expr
);
3213 t
= resolve_unknown_f (expr
);
3217 gfc_internal_error ("resolve_function(): bad function type");
3221 /* If the expression is still a function (it might have simplified),
3222 then we check to see if we are calling an elemental function. */
3224 if (expr
->expr_type
!= EXPR_FUNCTION
)
3227 temp
= need_full_assumed_size
;
3228 need_full_assumed_size
= 0;
3230 if (!resolve_elemental_actual (expr
, NULL
))
3233 if (omp_workshare_flag
3234 && expr
->value
.function
.esym
3235 && ! gfc_elemental (expr
->value
.function
.esym
))
3237 gfc_error ("User defined non-ELEMENTAL function %qs at %L not allowed "
3238 "in WORKSHARE construct", expr
->value
.function
.esym
->name
,
3243 #define GENERIC_ID expr->value.function.isym->id
3244 else if (expr
->value
.function
.actual
!= NULL
3245 && expr
->value
.function
.isym
!= NULL
3246 && GENERIC_ID
!= GFC_ISYM_LBOUND
3247 && GENERIC_ID
!= GFC_ISYM_LCOBOUND
3248 && GENERIC_ID
!= GFC_ISYM_UCOBOUND
3249 && GENERIC_ID
!= GFC_ISYM_LEN
3250 && GENERIC_ID
!= GFC_ISYM_LOC
3251 && GENERIC_ID
!= GFC_ISYM_C_LOC
3252 && GENERIC_ID
!= GFC_ISYM_PRESENT
)
3254 /* Array intrinsics must also have the last upper bound of an
3255 assumed size array argument. UBOUND and SIZE have to be
3256 excluded from the check if the second argument is anything
3259 for (arg
= expr
->value
.function
.actual
; arg
; arg
= arg
->next
)
3261 if ((GENERIC_ID
== GFC_ISYM_UBOUND
|| GENERIC_ID
== GFC_ISYM_SIZE
)
3262 && arg
== expr
->value
.function
.actual
3263 && arg
->next
!= NULL
&& arg
->next
->expr
)
3265 if (arg
->next
->expr
->expr_type
!= EXPR_CONSTANT
)
3268 if (arg
->next
->name
&& strcmp (arg
->next
->name
, "kind") == 0)
3271 if ((int)mpz_get_si (arg
->next
->expr
->value
.integer
)
3276 if (arg
->expr
!= NULL
3277 && arg
->expr
->rank
> 0
3278 && resolve_assumed_size_actual (arg
->expr
))
3284 need_full_assumed_size
= temp
;
3286 if (!check_pure_function(expr
))
3289 /* Functions without the RECURSIVE attribution are not allowed to
3290 * call themselves. */
3291 if (expr
->value
.function
.esym
&& !expr
->value
.function
.esym
->attr
.recursive
)
3294 esym
= expr
->value
.function
.esym
;
3296 if (is_illegal_recursion (esym
, gfc_current_ns
))
3298 if (esym
->attr
.entry
&& esym
->ns
->entries
)
3299 gfc_error ("ENTRY %qs at %L cannot be called recursively, as"
3300 " function %qs is not RECURSIVE",
3301 esym
->name
, &expr
->where
, esym
->ns
->entries
->sym
->name
);
3303 gfc_error ("Function %qs at %L cannot be called recursively, as it"
3304 " is not RECURSIVE", esym
->name
, &expr
->where
);
3310 /* Character lengths of use associated functions may contains references to
3311 symbols not referenced from the current program unit otherwise. Make sure
3312 those symbols are marked as referenced. */
3314 if (expr
->ts
.type
== BT_CHARACTER
&& expr
->value
.function
.esym
3315 && expr
->value
.function
.esym
->attr
.use_assoc
)
3317 gfc_expr_set_symbols_referenced (expr
->ts
.u
.cl
->length
);
3320 /* Make sure that the expression has a typespec that works. */
3321 if (expr
->ts
.type
== BT_UNKNOWN
)
3323 if (expr
->symtree
->n
.sym
->result
3324 && expr
->symtree
->n
.sym
->result
->ts
.type
!= BT_UNKNOWN
3325 && !expr
->symtree
->n
.sym
->result
->attr
.proc_pointer
)
3326 expr
->ts
= expr
->symtree
->n
.sym
->result
->ts
;
3329 if (!expr
->ref
&& !expr
->value
.function
.isym
)
3331 if (expr
->value
.function
.esym
)
3332 update_current_proc_array_outer_dependency (expr
->value
.function
.esym
);
3334 update_current_proc_array_outer_dependency (sym
);
3337 /* typebound procedure: Assume the worst. */
3338 gfc_current_ns
->proc_name
->attr
.array_outer_dependency
= 1;
3344 /************* Subroutine resolution *************/
3347 pure_subroutine (gfc_symbol
*sym
, const char *name
, locus
*loc
)
3354 gfc_error ("Subroutine call to %qs in FORALL block at %L is not PURE",
3358 else if (gfc_do_concurrent_flag
)
3360 gfc_error ("Subroutine call to %qs in DO CONCURRENT block at %L is not "
3364 else if (gfc_pure (NULL
))
3366 gfc_error ("Subroutine call to %qs at %L is not PURE", name
, loc
);
3370 gfc_unset_implicit_pure (NULL
);
3376 resolve_generic_s0 (gfc_code
*c
, gfc_symbol
*sym
)
3380 if (sym
->attr
.generic
)
3382 s
= gfc_search_interface (sym
->generic
, 1, &c
->ext
.actual
);
3385 c
->resolved_sym
= s
;
3386 if (!pure_subroutine (s
, s
->name
, &c
->loc
))
3391 /* TODO: Need to search for elemental references in generic interface. */
3394 if (sym
->attr
.intrinsic
)
3395 return gfc_intrinsic_sub_interface (c
, 0);
3402 resolve_generic_s (gfc_code
*c
)
3407 sym
= c
->symtree
->n
.sym
;
3411 m
= resolve_generic_s0 (c
, sym
);
3414 else if (m
== MATCH_ERROR
)
3418 if (sym
->ns
->parent
== NULL
)
3420 gfc_find_symbol (sym
->name
, sym
->ns
->parent
, 1, &sym
);
3424 if (!generic_sym (sym
))
3428 /* Last ditch attempt. See if the reference is to an intrinsic
3429 that possesses a matching interface. 14.1.2.4 */
3430 sym
= c
->symtree
->n
.sym
;
3432 if (!gfc_is_intrinsic (sym
, 1, c
->loc
))
3434 gfc_error ("There is no specific subroutine for the generic %qs at %L",
3435 sym
->name
, &c
->loc
);
3439 m
= gfc_intrinsic_sub_interface (c
, 0);
3443 gfc_error ("Generic subroutine %qs at %L is not consistent with an "
3444 "intrinsic subroutine interface", sym
->name
, &c
->loc
);
3450 /* Resolve a subroutine call known to be specific. */
3453 resolve_specific_s0 (gfc_code
*c
, gfc_symbol
*sym
)
3457 if (sym
->attr
.external
|| sym
->attr
.if_source
== IFSRC_IFBODY
)
3459 if (sym
->attr
.dummy
)
3461 sym
->attr
.proc
= PROC_DUMMY
;
3465 sym
->attr
.proc
= PROC_EXTERNAL
;
3469 if (sym
->attr
.proc
== PROC_MODULE
|| sym
->attr
.proc
== PROC_INTERNAL
)
3472 if (sym
->attr
.intrinsic
)
3474 m
= gfc_intrinsic_sub_interface (c
, 1);
3478 gfc_error ("Subroutine %qs at %L is INTRINSIC but is not compatible "
3479 "with an intrinsic", sym
->name
, &c
->loc
);
3487 gfc_procedure_use (sym
, &c
->ext
.actual
, &c
->loc
);
3489 c
->resolved_sym
= sym
;
3490 if (!pure_subroutine (sym
, sym
->name
, &c
->loc
))
3498 resolve_specific_s (gfc_code
*c
)
3503 sym
= c
->symtree
->n
.sym
;
3507 m
= resolve_specific_s0 (c
, sym
);
3510 if (m
== MATCH_ERROR
)
3513 if (sym
->ns
->parent
== NULL
)
3516 gfc_find_symbol (sym
->name
, sym
->ns
->parent
, 1, &sym
);
3522 sym
= c
->symtree
->n
.sym
;
3523 gfc_error ("Unable to resolve the specific subroutine %qs at %L",
3524 sym
->name
, &c
->loc
);
3530 /* Resolve a subroutine call not known to be generic nor specific. */
3533 resolve_unknown_s (gfc_code
*c
)
3537 sym
= c
->symtree
->n
.sym
;
3539 if (sym
->attr
.dummy
)
3541 sym
->attr
.proc
= PROC_DUMMY
;
3545 /* See if we have an intrinsic function reference. */
3547 if (gfc_is_intrinsic (sym
, 1, c
->loc
))
3549 if (gfc_intrinsic_sub_interface (c
, 1) == MATCH_YES
)
3554 /* The reference is to an external name. */
3557 gfc_procedure_use (sym
, &c
->ext
.actual
, &c
->loc
);
3559 c
->resolved_sym
= sym
;
3561 return pure_subroutine (sym
, sym
->name
, &c
->loc
);
3565 /* Resolve a subroutine call. Although it was tempting to use the same code
3566 for functions, subroutines and functions are stored differently and this
3567 makes things awkward. */
3570 resolve_call (gfc_code
*c
)
3573 procedure_type ptype
= PROC_INTRINSIC
;
3574 gfc_symbol
*csym
, *sym
;
3575 bool no_formal_args
;
3577 csym
= c
->symtree
? c
->symtree
->n
.sym
: NULL
;
3579 if (csym
&& csym
->ts
.type
!= BT_UNKNOWN
)
3581 gfc_error ("%qs at %L has a type, which is not consistent with "
3582 "the CALL at %L", csym
->name
, &csym
->declared_at
, &c
->loc
);
3586 if (csym
&& gfc_current_ns
->parent
&& csym
->ns
!= gfc_current_ns
)
3589 gfc_find_sym_tree (c
->symtree
->name
, gfc_current_ns
, 1, &st
);
3590 sym
= st
? st
->n
.sym
: NULL
;
3591 if (sym
&& csym
!= sym
3592 && sym
->ns
== gfc_current_ns
3593 && sym
->attr
.flavor
== FL_PROCEDURE
3594 && sym
->attr
.contained
)
3597 if (csym
->attr
.generic
)
3598 c
->symtree
->n
.sym
= sym
;
3601 csym
= c
->symtree
->n
.sym
;
3605 /* If this ia a deferred TBP, c->expr1 will be set. */
3606 if (!c
->expr1
&& csym
)
3608 if (csym
->attr
.abstract
)
3610 gfc_error ("ABSTRACT INTERFACE %qs must not be referenced at %L",
3611 csym
->name
, &c
->loc
);
3615 /* Subroutines without the RECURSIVE attribution are not allowed to
3617 if (is_illegal_recursion (csym
, gfc_current_ns
))
3619 if (csym
->attr
.entry
&& csym
->ns
->entries
)
3620 gfc_error ("ENTRY %qs at %L cannot be called recursively, "
3621 "as subroutine %qs is not RECURSIVE",
3622 csym
->name
, &c
->loc
, csym
->ns
->entries
->sym
->name
);
3624 gfc_error ("SUBROUTINE %qs at %L cannot be called recursively, "
3625 "as it is not RECURSIVE", csym
->name
, &c
->loc
);
3631 /* Switch off assumed size checking and do this again for certain kinds
3632 of procedure, once the procedure itself is resolved. */
3633 need_full_assumed_size
++;
3636 ptype
= csym
->attr
.proc
;
3638 no_formal_args
= csym
&& is_external_proc (csym
)
3639 && gfc_sym_get_dummy_args (csym
) == NULL
;
3640 if (!resolve_actual_arglist (c
->ext
.actual
, ptype
, no_formal_args
))
3643 /* Resume assumed_size checking. */
3644 need_full_assumed_size
--;
3646 /* If external, check for usage. */
3647 if (csym
&& is_external_proc (csym
))
3648 resolve_global_procedure (csym
, &c
->loc
, &c
->ext
.actual
, 1);
3651 if (c
->resolved_sym
== NULL
)
3653 c
->resolved_isym
= NULL
;
3654 switch (procedure_kind (csym
))
3657 t
= resolve_generic_s (c
);
3660 case PTYPE_SPECIFIC
:
3661 t
= resolve_specific_s (c
);
3665 t
= resolve_unknown_s (c
);
3669 gfc_internal_error ("resolve_subroutine(): bad function type");
3673 /* Some checks of elemental subroutine actual arguments. */
3674 if (!resolve_elemental_actual (NULL
, c
))
3678 update_current_proc_array_outer_dependency (csym
);
3680 /* Typebound procedure: Assume the worst. */
3681 gfc_current_ns
->proc_name
->attr
.array_outer_dependency
= 1;
3687 /* Compare the shapes of two arrays that have non-NULL shapes. If both
3688 op1->shape and op2->shape are non-NULL return true if their shapes
3689 match. If both op1->shape and op2->shape are non-NULL return false
3690 if their shapes do not match. If either op1->shape or op2->shape is
3691 NULL, return true. */
3694 compare_shapes (gfc_expr
*op1
, gfc_expr
*op2
)
3701 if (op1
->shape
!= NULL
&& op2
->shape
!= NULL
)
3703 for (i
= 0; i
< op1
->rank
; i
++)
3705 if (mpz_cmp (op1
->shape
[i
], op2
->shape
[i
]) != 0)
3707 gfc_error ("Shapes for operands at %L and %L are not conformable",
3708 &op1
->where
, &op2
->where
);
3718 /* Convert a logical operator to the corresponding bitwise intrinsic call.
3719 For example A .AND. B becomes IAND(A, B). */
3721 logical_to_bitwise (gfc_expr
*e
)
3723 gfc_expr
*tmp
, *op1
, *op2
;
3725 gfc_actual_arglist
*args
= NULL
;
3727 gcc_assert (e
->expr_type
== EXPR_OP
);
3729 isym
= GFC_ISYM_NONE
;
3730 op1
= e
->value
.op
.op1
;
3731 op2
= e
->value
.op
.op2
;
3733 switch (e
->value
.op
.op
)
3736 isym
= GFC_ISYM_NOT
;
3739 isym
= GFC_ISYM_IAND
;
3742 isym
= GFC_ISYM_IOR
;
3744 case INTRINSIC_NEQV
:
3745 isym
= GFC_ISYM_IEOR
;
3748 /* "Bitwise eqv" is just the complement of NEQV === IEOR.
3749 Change the old expression to NEQV, which will get replaced by IEOR,
3750 and wrap it in NOT. */
3751 tmp
= gfc_copy_expr (e
);
3752 tmp
->value
.op
.op
= INTRINSIC_NEQV
;
3753 tmp
= logical_to_bitwise (tmp
);
3754 isym
= GFC_ISYM_NOT
;
3759 gfc_internal_error ("logical_to_bitwise(): Bad intrinsic");
3762 /* Inherit the original operation's operands as arguments. */
3763 args
= gfc_get_actual_arglist ();
3767 args
->next
= gfc_get_actual_arglist ();
3768 args
->next
->expr
= op2
;
3771 /* Convert the expression to a function call. */
3772 e
->expr_type
= EXPR_FUNCTION
;
3773 e
->value
.function
.actual
= args
;
3774 e
->value
.function
.isym
= gfc_intrinsic_function_by_id (isym
);
3775 e
->value
.function
.name
= e
->value
.function
.isym
->name
;
3776 e
->value
.function
.esym
= NULL
;
3778 /* Make up a pre-resolved function call symtree if we need to. */
3779 if (!e
->symtree
|| !e
->symtree
->n
.sym
)
3782 gfc_get_ha_sym_tree (e
->value
.function
.isym
->name
, &e
->symtree
);
3783 sym
= e
->symtree
->n
.sym
;
3785 sym
->attr
.flavor
= FL_PROCEDURE
;
3786 sym
->attr
.function
= 1;
3787 sym
->attr
.elemental
= 1;
3789 sym
->attr
.referenced
= 1;
3790 gfc_intrinsic_symbol (sym
);
3791 gfc_commit_symbol (sym
);
3794 args
->name
= e
->value
.function
.isym
->formal
->name
;
3795 if (e
->value
.function
.isym
->formal
->next
)
3796 args
->next
->name
= e
->value
.function
.isym
->formal
->next
->name
;
3801 /* Recursively append candidate UOP to CANDIDATES. Store the number of
3802 candidates in CANDIDATES_LEN. */
3804 lookup_uop_fuzzy_find_candidates (gfc_symtree
*uop
,
3806 size_t &candidates_len
)
3813 /* Not sure how to properly filter here. Use all for a start.
3814 n.uop.op is NULL for empty interface operators (is that legal?) disregard
3815 these as i suppose they don't make terribly sense. */
3817 if (uop
->n
.uop
->op
!= NULL
)
3818 vec_push (candidates
, candidates_len
, uop
->name
);
3822 lookup_uop_fuzzy_find_candidates (p
, candidates
, candidates_len
);
3826 lookup_uop_fuzzy_find_candidates (p
, candidates
, candidates_len
);
3829 /* Lookup user-operator OP fuzzily, taking names in UOP into account. */
3832 lookup_uop_fuzzy (const char *op
, gfc_symtree
*uop
)
3834 char **candidates
= NULL
;
3835 size_t candidates_len
= 0;
3836 lookup_uop_fuzzy_find_candidates (uop
, candidates
, candidates_len
);
3837 return gfc_closest_fuzzy_match (op
, candidates
);
3841 /* Callback finding an impure function as an operand to an .and. or
3842 .or. expression. Remember the last function warned about to
3843 avoid double warnings when recursing. */
3846 impure_function_callback (gfc_expr
**e
, int *walk_subtrees ATTRIBUTE_UNUSED
,
3851 static gfc_expr
*last
= NULL
;
3852 bool *found
= (bool *) data
;
3854 if (f
->expr_type
== EXPR_FUNCTION
)
3857 if (f
!= last
&& !gfc_pure_function (f
, &name
)
3858 && !gfc_implicit_pure_function (f
))
3861 gfc_warning (OPT_Wfunction_elimination
,
3862 "Impure function %qs at %L might not be evaluated",
3865 gfc_warning (OPT_Wfunction_elimination
,
3866 "Impure function at %L might not be evaluated",
3876 /* Resolve an operator expression node. This can involve replacing the
3877 operation with a user defined function call. */
3880 resolve_operator (gfc_expr
*e
)
3882 gfc_expr
*op1
, *op2
;
3884 bool dual_locus_error
;
3887 /* Resolve all subnodes-- give them types. */
3889 switch (e
->value
.op
.op
)
3892 if (!gfc_resolve_expr (e
->value
.op
.op2
))
3898 case INTRINSIC_UPLUS
:
3899 case INTRINSIC_UMINUS
:
3900 case INTRINSIC_PARENTHESES
:
3901 if (!gfc_resolve_expr (e
->value
.op
.op1
))
3906 /* Typecheck the new node. */
3908 op1
= e
->value
.op
.op1
;
3909 op2
= e
->value
.op
.op2
;
3910 dual_locus_error
= false;
3912 if ((op1
&& op1
->expr_type
== EXPR_NULL
)
3913 || (op2
&& op2
->expr_type
== EXPR_NULL
))
3915 sprintf (msg
, _("Invalid context for NULL() pointer at %%L"));
3919 switch (e
->value
.op
.op
)
3921 case INTRINSIC_UPLUS
:
3922 case INTRINSIC_UMINUS
:
3923 if (op1
->ts
.type
== BT_INTEGER
3924 || op1
->ts
.type
== BT_REAL
3925 || op1
->ts
.type
== BT_COMPLEX
)
3931 sprintf (msg
, _("Operand of unary numeric operator %%<%s%%> at %%L is %s"),
3932 gfc_op2string (e
->value
.op
.op
), gfc_typename (&e
->ts
));
3935 case INTRINSIC_PLUS
:
3936 case INTRINSIC_MINUS
:
3937 case INTRINSIC_TIMES
:
3938 case INTRINSIC_DIVIDE
:
3939 case INTRINSIC_POWER
:
3940 if (gfc_numeric_ts (&op1
->ts
) && gfc_numeric_ts (&op2
->ts
))
3942 gfc_type_convert_binary (e
, 1);
3946 if (op1
->ts
.type
== BT_DERIVED
|| op2
->ts
.type
== BT_DERIVED
)
3948 _("Unexpected derived-type entities in binary intrinsic "
3949 "numeric operator %%<%s%%> at %%L"),
3950 gfc_op2string (e
->value
.op
.op
));
3953 _("Operands of binary numeric operator %%<%s%%> at %%L are %s/%s"),
3954 gfc_op2string (e
->value
.op
.op
), gfc_typename (&op1
->ts
),
3955 gfc_typename (&op2
->ts
));
3958 case INTRINSIC_CONCAT
:
3959 if (op1
->ts
.type
== BT_CHARACTER
&& op2
->ts
.type
== BT_CHARACTER
3960 && op1
->ts
.kind
== op2
->ts
.kind
)
3962 e
->ts
.type
= BT_CHARACTER
;
3963 e
->ts
.kind
= op1
->ts
.kind
;
3968 _("Operands of string concatenation operator at %%L are %s/%s"),
3969 gfc_typename (&op1
->ts
), gfc_typename (&op2
->ts
));
3975 case INTRINSIC_NEQV
:
3976 if (op1
->ts
.type
== BT_LOGICAL
&& op2
->ts
.type
== BT_LOGICAL
)
3978 e
->ts
.type
= BT_LOGICAL
;
3979 e
->ts
.kind
= gfc_kind_max (op1
, op2
);
3980 if (op1
->ts
.kind
< e
->ts
.kind
)
3981 gfc_convert_type (op1
, &e
->ts
, 2);
3982 else if (op2
->ts
.kind
< e
->ts
.kind
)
3983 gfc_convert_type (op2
, &e
->ts
, 2);
3985 if (flag_frontend_optimize
&&
3986 (e
->value
.op
.op
== INTRINSIC_AND
|| e
->value
.op
.op
== INTRINSIC_OR
))
3988 /* Warn about short-circuiting
3989 with impure function as second operand. */
3991 gfc_expr_walker (&op2
, impure_function_callback
, &op2_f
);
3996 /* Logical ops on integers become bitwise ops with -fdec. */
3998 && (op1
->ts
.type
== BT_INTEGER
|| op2
->ts
.type
== BT_INTEGER
))
4000 e
->ts
.type
= BT_INTEGER
;
4001 e
->ts
.kind
= gfc_kind_max (op1
, op2
);
4002 if (op1
->ts
.type
!= e
->ts
.type
|| op1
->ts
.kind
!= e
->ts
.kind
)
4003 gfc_convert_type (op1
, &e
->ts
, 1);
4004 if (op2
->ts
.type
!= e
->ts
.type
|| op2
->ts
.kind
!= e
->ts
.kind
)
4005 gfc_convert_type (op2
, &e
->ts
, 1);
4006 e
= logical_to_bitwise (e
);
4007 return resolve_function (e
);
4010 sprintf (msg
, _("Operands of logical operator %%<%s%%> at %%L are %s/%s"),
4011 gfc_op2string (e
->value
.op
.op
), gfc_typename (&op1
->ts
),
4012 gfc_typename (&op2
->ts
));
4017 /* Logical ops on integers become bitwise ops with -fdec. */
4018 if (flag_dec
&& op1
->ts
.type
== BT_INTEGER
)
4020 e
->ts
.type
= BT_INTEGER
;
4021 e
->ts
.kind
= op1
->ts
.kind
;
4022 e
= logical_to_bitwise (e
);
4023 return resolve_function (e
);
4026 if (op1
->ts
.type
== BT_LOGICAL
)
4028 e
->ts
.type
= BT_LOGICAL
;
4029 e
->ts
.kind
= op1
->ts
.kind
;
4033 sprintf (msg
, _("Operand of .not. operator at %%L is %s"),
4034 gfc_typename (&op1
->ts
));
4038 case INTRINSIC_GT_OS
:
4040 case INTRINSIC_GE_OS
:
4042 case INTRINSIC_LT_OS
:
4044 case INTRINSIC_LE_OS
:
4045 if (op1
->ts
.type
== BT_COMPLEX
|| op2
->ts
.type
== BT_COMPLEX
)
4047 strcpy (msg
, _("COMPLEX quantities cannot be compared at %L"));
4054 case INTRINSIC_EQ_OS
:
4056 case INTRINSIC_NE_OS
:
4057 if (op1
->ts
.type
== BT_CHARACTER
&& op2
->ts
.type
== BT_CHARACTER
4058 && op1
->ts
.kind
== op2
->ts
.kind
)
4060 e
->ts
.type
= BT_LOGICAL
;
4061 e
->ts
.kind
= gfc_default_logical_kind
;
4065 if (gfc_numeric_ts (&op1
->ts
) && gfc_numeric_ts (&op2
->ts
))
4067 gfc_type_convert_binary (e
, 1);
4069 e
->ts
.type
= BT_LOGICAL
;
4070 e
->ts
.kind
= gfc_default_logical_kind
;
4072 if (warn_compare_reals
)
4074 gfc_intrinsic_op op
= e
->value
.op
.op
;
4076 /* Type conversion has made sure that the types of op1 and op2
4077 agree, so it is only necessary to check the first one. */
4078 if ((op1
->ts
.type
== BT_REAL
|| op1
->ts
.type
== BT_COMPLEX
)
4079 && (op
== INTRINSIC_EQ
|| op
== INTRINSIC_EQ_OS
4080 || op
== INTRINSIC_NE
|| op
== INTRINSIC_NE_OS
))
4084 if (op
== INTRINSIC_EQ
|| op
== INTRINSIC_EQ_OS
)
4085 msg
= "Equality comparison for %s at %L";
4087 msg
= "Inequality comparison for %s at %L";
4089 gfc_warning (OPT_Wcompare_reals
, msg
,
4090 gfc_typename (&op1
->ts
), &op1
->where
);
4097 if (op1
->ts
.type
== BT_LOGICAL
&& op2
->ts
.type
== BT_LOGICAL
)
4099 _("Logicals at %%L must be compared with %s instead of %s"),
4100 (e
->value
.op
.op
== INTRINSIC_EQ
4101 || e
->value
.op
.op
== INTRINSIC_EQ_OS
)
4102 ? ".eqv." : ".neqv.", gfc_op2string (e
->value
.op
.op
));
4105 _("Operands of comparison operator %%<%s%%> at %%L are %s/%s"),
4106 gfc_op2string (e
->value
.op
.op
), gfc_typename (&op1
->ts
),
4107 gfc_typename (&op2
->ts
));
4111 case INTRINSIC_USER
:
4112 if (e
->value
.op
.uop
->op
== NULL
)
4114 const char *name
= e
->value
.op
.uop
->name
;
4115 const char *guessed
;
4116 guessed
= lookup_uop_fuzzy (name
, e
->value
.op
.uop
->ns
->uop_root
);
4118 sprintf (msg
, _("Unknown operator %%<%s%%> at %%L; did you mean '%s'?"),
4121 sprintf (msg
, _("Unknown operator %%<%s%%> at %%L"), name
);
4123 else if (op2
== NULL
)
4124 sprintf (msg
, _("Operand of user operator %%<%s%%> at %%L is %s"),
4125 e
->value
.op
.uop
->name
, gfc_typename (&op1
->ts
));
4128 sprintf (msg
, _("Operands of user operator %%<%s%%> at %%L are %s/%s"),
4129 e
->value
.op
.uop
->name
, gfc_typename (&op1
->ts
),
4130 gfc_typename (&op2
->ts
));
4131 e
->value
.op
.uop
->op
->sym
->attr
.referenced
= 1;
4136 case INTRINSIC_PARENTHESES
:
4138 if (e
->ts
.type
== BT_CHARACTER
)
4139 e
->ts
.u
.cl
= op1
->ts
.u
.cl
;
4143 gfc_internal_error ("resolve_operator(): Bad intrinsic");
4146 /* Deal with arrayness of an operand through an operator. */
4150 switch (e
->value
.op
.op
)
4152 case INTRINSIC_PLUS
:
4153 case INTRINSIC_MINUS
:
4154 case INTRINSIC_TIMES
:
4155 case INTRINSIC_DIVIDE
:
4156 case INTRINSIC_POWER
:
4157 case INTRINSIC_CONCAT
:
4161 case INTRINSIC_NEQV
:
4163 case INTRINSIC_EQ_OS
:
4165 case INTRINSIC_NE_OS
:
4167 case INTRINSIC_GT_OS
:
4169 case INTRINSIC_GE_OS
:
4171 case INTRINSIC_LT_OS
:
4173 case INTRINSIC_LE_OS
:
4175 if (op1
->rank
== 0 && op2
->rank
== 0)
4178 if (op1
->rank
== 0 && op2
->rank
!= 0)
4180 e
->rank
= op2
->rank
;
4182 if (e
->shape
== NULL
)
4183 e
->shape
= gfc_copy_shape (op2
->shape
, op2
->rank
);
4186 if (op1
->rank
!= 0 && op2
->rank
== 0)
4188 e
->rank
= op1
->rank
;
4190 if (e
->shape
== NULL
)
4191 e
->shape
= gfc_copy_shape (op1
->shape
, op1
->rank
);
4194 if (op1
->rank
!= 0 && op2
->rank
!= 0)
4196 if (op1
->rank
== op2
->rank
)
4198 e
->rank
= op1
->rank
;
4199 if (e
->shape
== NULL
)
4201 t
= compare_shapes (op1
, op2
);
4205 e
->shape
= gfc_copy_shape (op1
->shape
, op1
->rank
);
4210 /* Allow higher level expressions to work. */
4213 /* Try user-defined operators, and otherwise throw an error. */
4214 dual_locus_error
= true;
4216 _("Inconsistent ranks for operator at %%L and %%L"));
4223 case INTRINSIC_PARENTHESES
:
4225 case INTRINSIC_UPLUS
:
4226 case INTRINSIC_UMINUS
:
4227 /* Simply copy arrayness attribute */
4228 e
->rank
= op1
->rank
;
4230 if (e
->shape
== NULL
)
4231 e
->shape
= gfc_copy_shape (op1
->shape
, op1
->rank
);
4239 /* Attempt to simplify the expression. */
4242 t
= gfc_simplify_expr (e
, 0);
4243 /* Some calls do not succeed in simplification and return false
4244 even though there is no error; e.g. variable references to
4245 PARAMETER arrays. */
4246 if (!gfc_is_constant_expr (e
))
4254 match m
= gfc_extend_expr (e
);
4257 if (m
== MATCH_ERROR
)
4261 if (dual_locus_error
)
4262 gfc_error (msg
, &op1
->where
, &op2
->where
);
4264 gfc_error (msg
, &e
->where
);
4270 /************** Array resolution subroutines **************/
4273 { CMP_LT
, CMP_EQ
, CMP_GT
, CMP_UNKNOWN
};
4275 /* Compare two integer expressions. */
4277 static compare_result
4278 compare_bound (gfc_expr
*a
, gfc_expr
*b
)
4282 if (a
== NULL
|| a
->expr_type
!= EXPR_CONSTANT
4283 || b
== NULL
|| b
->expr_type
!= EXPR_CONSTANT
)
4286 /* If either of the types isn't INTEGER, we must have
4287 raised an error earlier. */
4289 if (a
->ts
.type
!= BT_INTEGER
|| b
->ts
.type
!= BT_INTEGER
)
4292 i
= mpz_cmp (a
->value
.integer
, b
->value
.integer
);
4302 /* Compare an integer expression with an integer. */
4304 static compare_result
4305 compare_bound_int (gfc_expr
*a
, int b
)
4309 if (a
== NULL
|| a
->expr_type
!= EXPR_CONSTANT
)
4312 if (a
->ts
.type
!= BT_INTEGER
)
4313 gfc_internal_error ("compare_bound_int(): Bad expression");
4315 i
= mpz_cmp_si (a
->value
.integer
, b
);
4325 /* Compare an integer expression with a mpz_t. */
4327 static compare_result
4328 compare_bound_mpz_t (gfc_expr
*a
, mpz_t b
)
4332 if (a
== NULL
|| a
->expr_type
!= EXPR_CONSTANT
)
4335 if (a
->ts
.type
!= BT_INTEGER
)
4336 gfc_internal_error ("compare_bound_int(): Bad expression");
4338 i
= mpz_cmp (a
->value
.integer
, b
);
4348 /* Compute the last value of a sequence given by a triplet.
4349 Return 0 if it wasn't able to compute the last value, or if the
4350 sequence if empty, and 1 otherwise. */
4353 compute_last_value_for_triplet (gfc_expr
*start
, gfc_expr
*end
,
4354 gfc_expr
*stride
, mpz_t last
)
4358 if (start
== NULL
|| start
->expr_type
!= EXPR_CONSTANT
4359 || end
== NULL
|| end
->expr_type
!= EXPR_CONSTANT
4360 || (stride
!= NULL
&& stride
->expr_type
!= EXPR_CONSTANT
))
4363 if (start
->ts
.type
!= BT_INTEGER
|| end
->ts
.type
!= BT_INTEGER
4364 || (stride
!= NULL
&& stride
->ts
.type
!= BT_INTEGER
))
4367 if (stride
== NULL
|| compare_bound_int (stride
, 1) == CMP_EQ
)
4369 if (compare_bound (start
, end
) == CMP_GT
)
4371 mpz_set (last
, end
->value
.integer
);
4375 if (compare_bound_int (stride
, 0) == CMP_GT
)
4377 /* Stride is positive */
4378 if (mpz_cmp (start
->value
.integer
, end
->value
.integer
) > 0)
4383 /* Stride is negative */
4384 if (mpz_cmp (start
->value
.integer
, end
->value
.integer
) < 0)
4389 mpz_sub (rem
, end
->value
.integer
, start
->value
.integer
);
4390 mpz_tdiv_r (rem
, rem
, stride
->value
.integer
);
4391 mpz_sub (last
, end
->value
.integer
, rem
);
4398 /* Compare a single dimension of an array reference to the array
4402 check_dimension (int i
, gfc_array_ref
*ar
, gfc_array_spec
*as
)
4406 if (ar
->dimen_type
[i
] == DIMEN_STAR
)
4408 gcc_assert (ar
->stride
[i
] == NULL
);
4409 /* This implies [*] as [*:] and [*:3] are not possible. */
4410 if (ar
->start
[i
] == NULL
)
4412 gcc_assert (ar
->end
[i
] == NULL
);
4417 /* Given start, end and stride values, calculate the minimum and
4418 maximum referenced indexes. */
4420 switch (ar
->dimen_type
[i
])
4423 case DIMEN_THIS_IMAGE
:
4428 if (compare_bound (ar
->start
[i
], as
->lower
[i
]) == CMP_LT
)
4431 gfc_warning (0, "Array reference at %L is out of bounds "
4432 "(%ld < %ld) in dimension %d", &ar
->c_where
[i
],
4433 mpz_get_si (ar
->start
[i
]->value
.integer
),
4434 mpz_get_si (as
->lower
[i
]->value
.integer
), i
+1);
4436 gfc_warning (0, "Array reference at %L is out of bounds "
4437 "(%ld < %ld) in codimension %d", &ar
->c_where
[i
],
4438 mpz_get_si (ar
->start
[i
]->value
.integer
),
4439 mpz_get_si (as
->lower
[i
]->value
.integer
),
4443 if (compare_bound (ar
->start
[i
], as
->upper
[i
]) == CMP_GT
)
4446 gfc_warning (0, "Array reference at %L is out of bounds "
4447 "(%ld > %ld) in dimension %d", &ar
->c_where
[i
],
4448 mpz_get_si (ar
->start
[i
]->value
.integer
),
4449 mpz_get_si (as
->upper
[i
]->value
.integer
), i
+1);
4451 gfc_warning (0, "Array reference at %L is out of bounds "
4452 "(%ld > %ld) in codimension %d", &ar
->c_where
[i
],
4453 mpz_get_si (ar
->start
[i
]->value
.integer
),
4454 mpz_get_si (as
->upper
[i
]->value
.integer
),
4463 #define AR_START (ar->start[i] ? ar->start[i] : as->lower[i])
4464 #define AR_END (ar->end[i] ? ar->end[i] : as->upper[i])
4466 compare_result comp_start_end
= compare_bound (AR_START
, AR_END
);
4468 /* Check for zero stride, which is not allowed. */
4469 if (compare_bound_int (ar
->stride
[i
], 0) == CMP_EQ
)
4471 gfc_error ("Illegal stride of zero at %L", &ar
->c_where
[i
]);
4475 /* if start == len || (stride > 0 && start < len)
4476 || (stride < 0 && start > len),
4477 then the array section contains at least one element. In this
4478 case, there is an out-of-bounds access if
4479 (start < lower || start > upper). */
4480 if (compare_bound (AR_START
, AR_END
) == CMP_EQ
4481 || ((compare_bound_int (ar
->stride
[i
], 0) == CMP_GT
4482 || ar
->stride
[i
] == NULL
) && comp_start_end
== CMP_LT
)
4483 || (compare_bound_int (ar
->stride
[i
], 0) == CMP_LT
4484 && comp_start_end
== CMP_GT
))
4486 if (compare_bound (AR_START
, as
->lower
[i
]) == CMP_LT
)
4488 gfc_warning (0, "Lower array reference at %L is out of bounds "
4489 "(%ld < %ld) in dimension %d", &ar
->c_where
[i
],
4490 mpz_get_si (AR_START
->value
.integer
),
4491 mpz_get_si (as
->lower
[i
]->value
.integer
), i
+1);
4494 if (compare_bound (AR_START
, as
->upper
[i
]) == CMP_GT
)
4496 gfc_warning (0, "Lower array reference at %L is out of bounds "
4497 "(%ld > %ld) in dimension %d", &ar
->c_where
[i
],
4498 mpz_get_si (AR_START
->value
.integer
),
4499 mpz_get_si (as
->upper
[i
]->value
.integer
), i
+1);
4504 /* If we can compute the highest index of the array section,
4505 then it also has to be between lower and upper. */
4506 mpz_init (last_value
);
4507 if (compute_last_value_for_triplet (AR_START
, AR_END
, ar
->stride
[i
],
4510 if (compare_bound_mpz_t (as
->lower
[i
], last_value
) == CMP_GT
)
4512 gfc_warning (0, "Upper array reference at %L is out of bounds "
4513 "(%ld < %ld) in dimension %d", &ar
->c_where
[i
],
4514 mpz_get_si (last_value
),
4515 mpz_get_si (as
->lower
[i
]->value
.integer
), i
+1);
4516 mpz_clear (last_value
);
4519 if (compare_bound_mpz_t (as
->upper
[i
], last_value
) == CMP_LT
)
4521 gfc_warning (0, "Upper array reference at %L is out of bounds "
4522 "(%ld > %ld) in dimension %d", &ar
->c_where
[i
],
4523 mpz_get_si (last_value
),
4524 mpz_get_si (as
->upper
[i
]->value
.integer
), i
+1);
4525 mpz_clear (last_value
);
4529 mpz_clear (last_value
);
4537 gfc_internal_error ("check_dimension(): Bad array reference");
4544 /* Compare an array reference with an array specification. */
4547 compare_spec_to_ref (gfc_array_ref
*ar
)
4554 /* TODO: Full array sections are only allowed as actual parameters. */
4555 if (as
->type
== AS_ASSUMED_SIZE
4556 && (/*ar->type == AR_FULL
4557 ||*/ (ar
->type
== AR_SECTION
4558 && ar
->dimen_type
[i
] == DIMEN_RANGE
&& ar
->end
[i
] == NULL
)))
4560 gfc_error ("Rightmost upper bound of assumed size array section "
4561 "not specified at %L", &ar
->where
);
4565 if (ar
->type
== AR_FULL
)
4568 if (as
->rank
!= ar
->dimen
)
4570 gfc_error ("Rank mismatch in array reference at %L (%d/%d)",
4571 &ar
->where
, ar
->dimen
, as
->rank
);
4575 /* ar->codimen == 0 is a local array. */
4576 if (as
->corank
!= ar
->codimen
&& ar
->codimen
!= 0)
4578 gfc_error ("Coindex rank mismatch in array reference at %L (%d/%d)",
4579 &ar
->where
, ar
->codimen
, as
->corank
);
4583 for (i
= 0; i
< as
->rank
; i
++)
4584 if (!check_dimension (i
, ar
, as
))
4587 /* Local access has no coarray spec. */
4588 if (ar
->codimen
!= 0)
4589 for (i
= as
->rank
; i
< as
->rank
+ as
->corank
; i
++)
4591 if (ar
->dimen_type
[i
] != DIMEN_ELEMENT
&& !ar
->in_allocate
4592 && ar
->dimen_type
[i
] != DIMEN_THIS_IMAGE
)
4594 gfc_error ("Coindex of codimension %d must be a scalar at %L",
4595 i
+ 1 - as
->rank
, &ar
->where
);
4598 if (!check_dimension (i
, ar
, as
))
4606 /* Resolve one part of an array index. */
4609 gfc_resolve_index_1 (gfc_expr
*index
, int check_scalar
,
4610 int force_index_integer_kind
)
4617 if (!gfc_resolve_expr (index
))
4620 if (check_scalar
&& index
->rank
!= 0)
4622 gfc_error ("Array index at %L must be scalar", &index
->where
);
4626 if (index
->ts
.type
!= BT_INTEGER
&& index
->ts
.type
!= BT_REAL
)
4628 gfc_error ("Array index at %L must be of INTEGER type, found %s",
4629 &index
->where
, gfc_basic_typename (index
->ts
.type
));
4633 if (index
->ts
.type
== BT_REAL
)
4634 if (!gfc_notify_std (GFC_STD_LEGACY
, "REAL array index at %L",
4638 if ((index
->ts
.kind
!= gfc_index_integer_kind
4639 && force_index_integer_kind
)
4640 || index
->ts
.type
!= BT_INTEGER
)
4643 ts
.type
= BT_INTEGER
;
4644 ts
.kind
= gfc_index_integer_kind
;
4646 gfc_convert_type_warn (index
, &ts
, 2, 0);
4652 /* Resolve one part of an array index. */
4655 gfc_resolve_index (gfc_expr
*index
, int check_scalar
)
4657 return gfc_resolve_index_1 (index
, check_scalar
, 1);
4660 /* Resolve a dim argument to an intrinsic function. */
4663 gfc_resolve_dim_arg (gfc_expr
*dim
)
4668 if (!gfc_resolve_expr (dim
))
4673 gfc_error ("Argument dim at %L must be scalar", &dim
->where
);
4678 if (dim
->ts
.type
!= BT_INTEGER
)
4680 gfc_error ("Argument dim at %L must be of INTEGER type", &dim
->where
);
4684 if (dim
->ts
.kind
!= gfc_index_integer_kind
)
4689 ts
.type
= BT_INTEGER
;
4690 ts
.kind
= gfc_index_integer_kind
;
4692 gfc_convert_type_warn (dim
, &ts
, 2, 0);
4698 /* Given an expression that contains array references, update those array
4699 references to point to the right array specifications. While this is
4700 filled in during matching, this information is difficult to save and load
4701 in a module, so we take care of it here.
4703 The idea here is that the original array reference comes from the
4704 base symbol. We traverse the list of reference structures, setting
4705 the stored reference to references. Component references can
4706 provide an additional array specification. */
4709 find_array_spec (gfc_expr
*e
)
4715 if (e
->symtree
->n
.sym
->ts
.type
== BT_CLASS
)
4716 as
= CLASS_DATA (e
->symtree
->n
.sym
)->as
;
4718 as
= e
->symtree
->n
.sym
->as
;
4720 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
4725 gfc_internal_error ("find_array_spec(): Missing spec");
4732 c
= ref
->u
.c
.component
;
4733 if (c
->attr
.dimension
)
4736 gfc_internal_error ("find_array_spec(): unused as(1)");
4747 gfc_internal_error ("find_array_spec(): unused as(2)");
4751 /* Resolve an array reference. */
4754 resolve_array_ref (gfc_array_ref
*ar
)
4756 int i
, check_scalar
;
4759 for (i
= 0; i
< ar
->dimen
+ ar
->codimen
; i
++)
4761 check_scalar
= ar
->dimen_type
[i
] == DIMEN_RANGE
;
4763 /* Do not force gfc_index_integer_kind for the start. We can
4764 do fine with any integer kind. This avoids temporary arrays
4765 created for indexing with a vector. */
4766 if (!gfc_resolve_index_1 (ar
->start
[i
], check_scalar
, 0))
4768 if (!gfc_resolve_index (ar
->end
[i
], check_scalar
))
4770 if (!gfc_resolve_index (ar
->stride
[i
], check_scalar
))
4775 if (ar
->dimen_type
[i
] == DIMEN_UNKNOWN
)
4779 ar
->dimen_type
[i
] = DIMEN_ELEMENT
;
4783 ar
->dimen_type
[i
] = DIMEN_VECTOR
;
4784 if (e
->expr_type
== EXPR_VARIABLE
4785 && e
->symtree
->n
.sym
->ts
.type
== BT_DERIVED
)
4786 ar
->start
[i
] = gfc_get_parentheses (e
);
4790 gfc_error ("Array index at %L is an array of rank %d",
4791 &ar
->c_where
[i
], e
->rank
);
4795 /* Fill in the upper bound, which may be lower than the
4796 specified one for something like a(2:10:5), which is
4797 identical to a(2:7:5). Only relevant for strides not equal
4798 to one. Don't try a division by zero. */
4799 if (ar
->dimen_type
[i
] == DIMEN_RANGE
4800 && ar
->stride
[i
] != NULL
&& ar
->stride
[i
]->expr_type
== EXPR_CONSTANT
4801 && mpz_cmp_si (ar
->stride
[i
]->value
.integer
, 1L) != 0
4802 && mpz_cmp_si (ar
->stride
[i
]->value
.integer
, 0L) != 0)
4806 if (gfc_ref_dimen_size (ar
, i
, &size
, &end
))
4808 if (ar
->end
[i
] == NULL
)
4811 gfc_get_constant_expr (BT_INTEGER
, gfc_index_integer_kind
,
4813 mpz_set (ar
->end
[i
]->value
.integer
, end
);
4815 else if (ar
->end
[i
]->ts
.type
== BT_INTEGER
4816 && ar
->end
[i
]->expr_type
== EXPR_CONSTANT
)
4818 mpz_set (ar
->end
[i
]->value
.integer
, end
);
4829 if (ar
->type
== AR_FULL
)
4831 if (ar
->as
->rank
== 0)
4832 ar
->type
= AR_ELEMENT
;
4834 /* Make sure array is the same as array(:,:), this way
4835 we don't need to special case all the time. */
4836 ar
->dimen
= ar
->as
->rank
;
4837 for (i
= 0; i
< ar
->dimen
; i
++)
4839 ar
->dimen_type
[i
] = DIMEN_RANGE
;
4841 gcc_assert (ar
->start
[i
] == NULL
);
4842 gcc_assert (ar
->end
[i
] == NULL
);
4843 gcc_assert (ar
->stride
[i
] == NULL
);
4847 /* If the reference type is unknown, figure out what kind it is. */
4849 if (ar
->type
== AR_UNKNOWN
)
4851 ar
->type
= AR_ELEMENT
;
4852 for (i
= 0; i
< ar
->dimen
; i
++)
4853 if (ar
->dimen_type
[i
] == DIMEN_RANGE
4854 || ar
->dimen_type
[i
] == DIMEN_VECTOR
)
4856 ar
->type
= AR_SECTION
;
4861 if (!ar
->as
->cray_pointee
&& !compare_spec_to_ref (ar
))
4864 if (ar
->as
->corank
&& ar
->codimen
== 0)
4867 ar
->codimen
= ar
->as
->corank
;
4868 for (n
= ar
->dimen
; n
< ar
->dimen
+ ar
->codimen
; n
++)
4869 ar
->dimen_type
[n
] = DIMEN_THIS_IMAGE
;
4877 resolve_substring (gfc_ref
*ref
)
4879 int k
= gfc_validate_kind (BT_INTEGER
, gfc_charlen_int_kind
, false);
4881 if (ref
->u
.ss
.start
!= NULL
)
4883 if (!gfc_resolve_expr (ref
->u
.ss
.start
))
4886 if (ref
->u
.ss
.start
->ts
.type
!= BT_INTEGER
)
4888 gfc_error ("Substring start index at %L must be of type INTEGER",
4889 &ref
->u
.ss
.start
->where
);
4893 if (ref
->u
.ss
.start
->rank
!= 0)
4895 gfc_error ("Substring start index at %L must be scalar",
4896 &ref
->u
.ss
.start
->where
);
4900 if (compare_bound_int (ref
->u
.ss
.start
, 1) == CMP_LT
4901 && (compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_EQ
4902 || compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_GT
))
4904 gfc_error ("Substring start index at %L is less than one",
4905 &ref
->u
.ss
.start
->where
);
4910 if (ref
->u
.ss
.end
!= NULL
)
4912 if (!gfc_resolve_expr (ref
->u
.ss
.end
))
4915 if (ref
->u
.ss
.end
->ts
.type
!= BT_INTEGER
)
4917 gfc_error ("Substring end index at %L must be of type INTEGER",
4918 &ref
->u
.ss
.end
->where
);
4922 if (ref
->u
.ss
.end
->rank
!= 0)
4924 gfc_error ("Substring end index at %L must be scalar",
4925 &ref
->u
.ss
.end
->where
);
4929 if (ref
->u
.ss
.length
!= NULL
4930 && compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.length
->length
) == CMP_GT
4931 && (compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_EQ
4932 || compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_GT
))
4934 gfc_error ("Substring end index at %L exceeds the string length",
4935 &ref
->u
.ss
.start
->where
);
4939 if (compare_bound_mpz_t (ref
->u
.ss
.end
,
4940 gfc_integer_kinds
[k
].huge
) == CMP_GT
4941 && (compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_EQ
4942 || compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_GT
))
4944 gfc_error ("Substring end index at %L is too large",
4945 &ref
->u
.ss
.end
->where
);
4954 /* This function supplies missing substring charlens. */
4957 gfc_resolve_substring_charlen (gfc_expr
*e
)
4960 gfc_expr
*start
, *end
;
4961 gfc_typespec
*ts
= NULL
;
4963 for (char_ref
= e
->ref
; char_ref
; char_ref
= char_ref
->next
)
4965 if (char_ref
->type
== REF_SUBSTRING
)
4967 if (char_ref
->type
== REF_COMPONENT
)
4968 ts
= &char_ref
->u
.c
.component
->ts
;
4974 gcc_assert (char_ref
->next
== NULL
);
4978 if (e
->ts
.u
.cl
->length
)
4979 gfc_free_expr (e
->ts
.u
.cl
->length
);
4980 else if (e
->expr_type
== EXPR_VARIABLE
&& e
->symtree
->n
.sym
->attr
.dummy
)
4984 e
->ts
.type
= BT_CHARACTER
;
4985 e
->ts
.kind
= gfc_default_character_kind
;
4988 e
->ts
.u
.cl
= gfc_new_charlen (gfc_current_ns
, NULL
);
4990 if (char_ref
->u
.ss
.start
)
4991 start
= gfc_copy_expr (char_ref
->u
.ss
.start
);
4993 start
= gfc_get_int_expr (gfc_charlen_int_kind
, NULL
, 1);
4995 if (char_ref
->u
.ss
.end
)
4996 end
= gfc_copy_expr (char_ref
->u
.ss
.end
);
4997 else if (e
->expr_type
== EXPR_VARIABLE
)
5000 ts
= &e
->symtree
->n
.sym
->ts
;
5001 end
= gfc_copy_expr (ts
->u
.cl
->length
);
5008 gfc_free_expr (start
);
5009 gfc_free_expr (end
);
5013 /* Length = (end - start + 1). */
5014 e
->ts
.u
.cl
->length
= gfc_subtract (end
, start
);
5015 e
->ts
.u
.cl
->length
= gfc_add (e
->ts
.u
.cl
->length
,
5016 gfc_get_int_expr (gfc_charlen_int_kind
,
5019 /* F2008, 6.4.1: Both the starting point and the ending point shall
5020 be within the range 1, 2, ..., n unless the starting point exceeds
5021 the ending point, in which case the substring has length zero. */
5023 if (mpz_cmp_si (e
->ts
.u
.cl
->length
->value
.integer
, 0) < 0)
5024 mpz_set_si (e
->ts
.u
.cl
->length
->value
.integer
, 0);
5026 e
->ts
.u
.cl
->length
->ts
.type
= BT_INTEGER
;
5027 e
->ts
.u
.cl
->length
->ts
.kind
= gfc_charlen_int_kind
;
5029 /* Make sure that the length is simplified. */
5030 gfc_simplify_expr (e
->ts
.u
.cl
->length
, 1);
5031 gfc_resolve_expr (e
->ts
.u
.cl
->length
);
5035 /* Resolve subtype references. */
5038 resolve_ref (gfc_expr
*expr
)
5040 int current_part_dimension
, n_components
, seen_part_dimension
;
5043 for (ref
= expr
->ref
; ref
; ref
= ref
->next
)
5044 if (ref
->type
== REF_ARRAY
&& ref
->u
.ar
.as
== NULL
)
5046 find_array_spec (expr
);
5050 for (ref
= expr
->ref
; ref
; ref
= ref
->next
)
5054 if (!resolve_array_ref (&ref
->u
.ar
))
5062 if (!resolve_substring (ref
))
5067 /* Check constraints on part references. */
5069 current_part_dimension
= 0;
5070 seen_part_dimension
= 0;
5073 for (ref
= expr
->ref
; ref
; ref
= ref
->next
)
5078 switch (ref
->u
.ar
.type
)
5081 /* Coarray scalar. */
5082 if (ref
->u
.ar
.as
->rank
== 0)
5084 current_part_dimension
= 0;
5089 current_part_dimension
= 1;
5093 current_part_dimension
= 0;
5097 gfc_internal_error ("resolve_ref(): Bad array reference");
5103 if (current_part_dimension
|| seen_part_dimension
)
5106 if (ref
->u
.c
.component
->attr
.pointer
5107 || ref
->u
.c
.component
->attr
.proc_pointer
5108 || (ref
->u
.c
.component
->ts
.type
== BT_CLASS
5109 && CLASS_DATA (ref
->u
.c
.component
)->attr
.pointer
))
5111 gfc_error ("Component to the right of a part reference "
5112 "with nonzero rank must not have the POINTER "
5113 "attribute at %L", &expr
->where
);
5116 else if (ref
->u
.c
.component
->attr
.allocatable
5117 || (ref
->u
.c
.component
->ts
.type
== BT_CLASS
5118 && CLASS_DATA (ref
->u
.c
.component
)->attr
.allocatable
))
5121 gfc_error ("Component to the right of a part reference "
5122 "with nonzero rank must not have the ALLOCATABLE "
5123 "attribute at %L", &expr
->where
);
5135 if (((ref
->type
== REF_COMPONENT
&& n_components
> 1)
5136 || ref
->next
== NULL
)
5137 && current_part_dimension
5138 && seen_part_dimension
)
5140 gfc_error ("Two or more part references with nonzero rank must "
5141 "not be specified at %L", &expr
->where
);
5145 if (ref
->type
== REF_COMPONENT
)
5147 if (current_part_dimension
)
5148 seen_part_dimension
= 1;
5150 /* reset to make sure */
5151 current_part_dimension
= 0;
5159 /* Given an expression, determine its shape. This is easier than it sounds.
5160 Leaves the shape array NULL if it is not possible to determine the shape. */
5163 expression_shape (gfc_expr
*e
)
5165 mpz_t array
[GFC_MAX_DIMENSIONS
];
5168 if (e
->rank
<= 0 || e
->shape
!= NULL
)
5171 for (i
= 0; i
< e
->rank
; i
++)
5172 if (!gfc_array_dimen_size (e
, i
, &array
[i
]))
5175 e
->shape
= gfc_get_shape (e
->rank
);
5177 memcpy (e
->shape
, array
, e
->rank
* sizeof (mpz_t
));
5182 for (i
--; i
>= 0; i
--)
5183 mpz_clear (array
[i
]);
5187 /* Given a variable expression node, compute the rank of the expression by
5188 examining the base symbol and any reference structures it may have. */
5191 expression_rank (gfc_expr
*e
)
5196 /* Just to make sure, because EXPR_COMPCALL's also have an e->ref and that
5197 could lead to serious confusion... */
5198 gcc_assert (e
->expr_type
!= EXPR_COMPCALL
);
5202 if (e
->expr_type
== EXPR_ARRAY
)
5204 /* Constructors can have a rank different from one via RESHAPE(). */
5206 if (e
->symtree
== NULL
)
5212 e
->rank
= (e
->symtree
->n
.sym
->as
== NULL
)
5213 ? 0 : e
->symtree
->n
.sym
->as
->rank
;
5219 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
5221 if (ref
->type
== REF_COMPONENT
&& ref
->u
.c
.component
->attr
.proc_pointer
5222 && ref
->u
.c
.component
->attr
.function
&& !ref
->next
)
5223 rank
= ref
->u
.c
.component
->as
? ref
->u
.c
.component
->as
->rank
: 0;
5225 if (ref
->type
!= REF_ARRAY
)
5228 if (ref
->u
.ar
.type
== AR_FULL
)
5230 rank
= ref
->u
.ar
.as
->rank
;
5234 if (ref
->u
.ar
.type
== AR_SECTION
)
5236 /* Figure out the rank of the section. */
5238 gfc_internal_error ("expression_rank(): Two array specs");
5240 for (i
= 0; i
< ref
->u
.ar
.dimen
; i
++)
5241 if (ref
->u
.ar
.dimen_type
[i
] == DIMEN_RANGE
5242 || ref
->u
.ar
.dimen_type
[i
] == DIMEN_VECTOR
)
5252 expression_shape (e
);
5257 add_caf_get_intrinsic (gfc_expr
*e
)
5259 gfc_expr
*wrapper
, *tmp_expr
;
5263 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
5264 if (ref
->type
== REF_ARRAY
&& ref
->u
.ar
.codimen
> 0)
5269 for (n
= ref
->u
.ar
.dimen
; n
< ref
->u
.ar
.dimen
+ ref
->u
.ar
.codimen
; n
++)
5270 if (ref
->u
.ar
.dimen_type
[n
] != DIMEN_ELEMENT
)
5273 tmp_expr
= XCNEW (gfc_expr
);
5275 wrapper
= gfc_build_intrinsic_call (gfc_current_ns
, GFC_ISYM_CAF_GET
,
5276 "caf_get", tmp_expr
->where
, 1, tmp_expr
);
5277 wrapper
->ts
= e
->ts
;
5278 wrapper
->rank
= e
->rank
;
5280 wrapper
->shape
= gfc_copy_shape (e
->shape
, e
->rank
);
5287 remove_caf_get_intrinsic (gfc_expr
*e
)
5289 gcc_assert (e
->expr_type
== EXPR_FUNCTION
&& e
->value
.function
.isym
5290 && e
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
);
5291 gfc_expr
*e2
= e
->value
.function
.actual
->expr
;
5292 e
->value
.function
.actual
->expr
= NULL
;
5293 gfc_free_actual_arglist (e
->value
.function
.actual
);
5294 gfc_free_shape (&e
->shape
, e
->rank
);
5300 /* Resolve a variable expression. */
5303 resolve_variable (gfc_expr
*e
)
5310 if (e
->symtree
== NULL
)
5312 sym
= e
->symtree
->n
.sym
;
5314 /* Use same check as for TYPE(*) below; this check has to be before TYPE(*)
5315 as ts.type is set to BT_ASSUMED in resolve_symbol. */
5316 if (sym
->attr
.ext_attr
& (1 << EXT_ATTR_NO_ARG_CHECK
))
5318 if (!actual_arg
|| inquiry_argument
)
5320 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute may only "
5321 "be used as actual argument", sym
->name
, &e
->where
);
5325 /* TS 29113, 407b. */
5326 else if (e
->ts
.type
== BT_ASSUMED
)
5330 gfc_error ("Assumed-type variable %s at %L may only be used "
5331 "as actual argument", sym
->name
, &e
->where
);
5334 else if (inquiry_argument
&& !first_actual_arg
)
5336 /* FIXME: It doesn't work reliably as inquiry_argument is not set
5337 for all inquiry functions in resolve_function; the reason is
5338 that the function-name resolution happens too late in that
5340 gfc_error ("Assumed-type variable %s at %L as actual argument to "
5341 "an inquiry function shall be the first argument",
5342 sym
->name
, &e
->where
);
5346 /* TS 29113, C535b. */
5347 else if ((sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
5348 && CLASS_DATA (sym
)->as
5349 && CLASS_DATA (sym
)->as
->type
== AS_ASSUMED_RANK
)
5350 || (sym
->ts
.type
!= BT_CLASS
&& sym
->as
5351 && sym
->as
->type
== AS_ASSUMED_RANK
))
5355 gfc_error ("Assumed-rank variable %s at %L may only be used as "
5356 "actual argument", sym
->name
, &e
->where
);
5359 else if (inquiry_argument
&& !first_actual_arg
)
5361 /* FIXME: It doesn't work reliably as inquiry_argument is not set
5362 for all inquiry functions in resolve_function; the reason is
5363 that the function-name resolution happens too late in that
5365 gfc_error ("Assumed-rank variable %s at %L as actual argument "
5366 "to an inquiry function shall be the first argument",
5367 sym
->name
, &e
->where
);
5372 if ((sym
->attr
.ext_attr
& (1 << EXT_ATTR_NO_ARG_CHECK
)) && e
->ref
5373 && !(e
->ref
->type
== REF_ARRAY
&& e
->ref
->u
.ar
.type
== AR_FULL
5374 && e
->ref
->next
== NULL
))
5376 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute shall not have "
5377 "a subobject reference", sym
->name
, &e
->ref
->u
.ar
.where
);
5380 /* TS 29113, 407b. */
5381 else if (e
->ts
.type
== BT_ASSUMED
&& e
->ref
5382 && !(e
->ref
->type
== REF_ARRAY
&& e
->ref
->u
.ar
.type
== AR_FULL
5383 && e
->ref
->next
== NULL
))
5385 gfc_error ("Assumed-type variable %s at %L shall not have a subobject "
5386 "reference", sym
->name
, &e
->ref
->u
.ar
.where
);
5390 /* TS 29113, C535b. */
5391 if (((sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
5392 && CLASS_DATA (sym
)->as
5393 && CLASS_DATA (sym
)->as
->type
== AS_ASSUMED_RANK
)
5394 || (sym
->ts
.type
!= BT_CLASS
&& sym
->as
5395 && sym
->as
->type
== AS_ASSUMED_RANK
))
5397 && !(e
->ref
->type
== REF_ARRAY
&& e
->ref
->u
.ar
.type
== AR_FULL
5398 && e
->ref
->next
== NULL
))
5400 gfc_error ("Assumed-rank variable %s at %L shall not have a subobject "
5401 "reference", sym
->name
, &e
->ref
->u
.ar
.where
);
5405 /* For variables that are used in an associate (target => object) where
5406 the object's basetype is array valued while the target is scalar,
5407 the ts' type of the component refs is still array valued, which
5408 can't be translated that way. */
5409 if (sym
->assoc
&& e
->rank
== 0 && e
->ref
&& sym
->ts
.type
== BT_CLASS
5410 && sym
->assoc
->target
->ts
.type
== BT_CLASS
5411 && CLASS_DATA (sym
->assoc
->target
)->as
)
5413 gfc_ref
*ref
= e
->ref
;
5419 ref
->u
.c
.sym
= sym
->ts
.u
.derived
;
5420 /* Stop the loop. */
5430 /* If this is an associate-name, it may be parsed with an array reference
5431 in error even though the target is scalar. Fail directly in this case.
5432 TODO Understand why class scalar expressions must be excluded. */
5433 if (sym
->assoc
&& !(sym
->ts
.type
== BT_CLASS
&& e
->rank
== 0))
5435 if (sym
->ts
.type
== BT_CLASS
)
5436 gfc_fix_class_refs (e
);
5437 if (!sym
->attr
.dimension
&& e
->ref
&& e
->ref
->type
== REF_ARRAY
)
5441 if (sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
->attr
.generic
)
5442 sym
->ts
.u
.derived
= gfc_find_dt_in_generic (sym
->ts
.u
.derived
);
5444 /* On the other hand, the parser may not have known this is an array;
5445 in this case, we have to add a FULL reference. */
5446 if (sym
->assoc
&& sym
->attr
.dimension
&& !e
->ref
)
5448 e
->ref
= gfc_get_ref ();
5449 e
->ref
->type
= REF_ARRAY
;
5450 e
->ref
->u
.ar
.type
= AR_FULL
;
5451 e
->ref
->u
.ar
.dimen
= 0;
5454 /* Like above, but for class types, where the checking whether an array
5455 ref is present is more complicated. Furthermore make sure not to add
5456 the full array ref to _vptr or _len refs. */
5457 if (sym
->assoc
&& sym
->ts
.type
== BT_CLASS
5458 && CLASS_DATA (sym
)->attr
.dimension
5459 && (e
->ts
.type
!= BT_DERIVED
|| !e
->ts
.u
.derived
->attr
.vtype
))
5461 gfc_ref
*ref
, *newref
;
5463 newref
= gfc_get_ref ();
5464 newref
->type
= REF_ARRAY
;
5465 newref
->u
.ar
.type
= AR_FULL
;
5466 newref
->u
.ar
.dimen
= 0;
5467 /* Because this is an associate var and the first ref either is a ref to
5468 the _data component or not, no traversal of the ref chain is
5469 needed. The array ref needs to be inserted after the _data ref,
5470 or when that is not present, which may happend for polymorphic
5471 types, then at the first position. */
5475 else if (ref
->type
== REF_COMPONENT
5476 && strcmp ("_data", ref
->u
.c
.component
->name
) == 0)
5478 if (!ref
->next
|| ref
->next
->type
!= REF_ARRAY
)
5480 newref
->next
= ref
->next
;
5484 /* Array ref present already. */
5485 gfc_free_ref_list (newref
);
5487 else if (ref
->type
== REF_ARRAY
)
5488 /* Array ref present already. */
5489 gfc_free_ref_list (newref
);
5497 if (e
->ref
&& !resolve_ref (e
))
5500 if (sym
->attr
.flavor
== FL_PROCEDURE
5501 && (!sym
->attr
.function
5502 || (sym
->attr
.function
&& sym
->result
5503 && sym
->result
->attr
.proc_pointer
5504 && !sym
->result
->attr
.function
)))
5506 e
->ts
.type
= BT_PROCEDURE
;
5507 goto resolve_procedure
;
5510 if (sym
->ts
.type
!= BT_UNKNOWN
)
5511 gfc_variable_attr (e
, &e
->ts
);
5512 else if (sym
->attr
.flavor
== FL_PROCEDURE
5513 && sym
->attr
.function
&& sym
->result
5514 && sym
->result
->ts
.type
!= BT_UNKNOWN
5515 && sym
->result
->attr
.proc_pointer
)
5516 e
->ts
= sym
->result
->ts
;
5519 /* Must be a simple variable reference. */
5520 if (!gfc_set_default_type (sym
, 1, sym
->ns
))
5525 if (check_assumed_size_reference (sym
, e
))
5528 /* Deal with forward references to entries during gfc_resolve_code, to
5529 satisfy, at least partially, 12.5.2.5. */
5530 if (gfc_current_ns
->entries
5531 && current_entry_id
== sym
->entry_id
5534 && cs_base
->current
->op
!= EXEC_ENTRY
)
5536 gfc_entry_list
*entry
;
5537 gfc_formal_arglist
*formal
;
5539 bool seen
, saved_specification_expr
;
5541 /* If the symbol is a dummy... */
5542 if (sym
->attr
.dummy
&& sym
->ns
== gfc_current_ns
)
5544 entry
= gfc_current_ns
->entries
;
5547 /* ...test if the symbol is a parameter of previous entries. */
5548 for (; entry
&& entry
->id
<= current_entry_id
; entry
= entry
->next
)
5549 for (formal
= entry
->sym
->formal
; formal
; formal
= formal
->next
)
5551 if (formal
->sym
&& sym
->name
== formal
->sym
->name
)
5558 /* If it has not been seen as a dummy, this is an error. */
5561 if (specification_expr
)
5562 gfc_error ("Variable %qs, used in a specification expression"
5563 ", is referenced at %L before the ENTRY statement "
5564 "in which it is a parameter",
5565 sym
->name
, &cs_base
->current
->loc
);
5567 gfc_error ("Variable %qs is used at %L before the ENTRY "
5568 "statement in which it is a parameter",
5569 sym
->name
, &cs_base
->current
->loc
);
5574 /* Now do the same check on the specification expressions. */
5575 saved_specification_expr
= specification_expr
;
5576 specification_expr
= true;
5577 if (sym
->ts
.type
== BT_CHARACTER
5578 && !gfc_resolve_expr (sym
->ts
.u
.cl
->length
))
5582 for (n
= 0; n
< sym
->as
->rank
; n
++)
5584 if (!gfc_resolve_expr (sym
->as
->lower
[n
]))
5586 if (!gfc_resolve_expr (sym
->as
->upper
[n
]))
5589 specification_expr
= saved_specification_expr
;
5592 /* Update the symbol's entry level. */
5593 sym
->entry_id
= current_entry_id
+ 1;
5596 /* If a symbol has been host_associated mark it. This is used latter,
5597 to identify if aliasing is possible via host association. */
5598 if (sym
->attr
.flavor
== FL_VARIABLE
5599 && gfc_current_ns
->parent
5600 && (gfc_current_ns
->parent
== sym
->ns
5601 || (gfc_current_ns
->parent
->parent
5602 && gfc_current_ns
->parent
->parent
== sym
->ns
)))
5603 sym
->attr
.host_assoc
= 1;
5605 if (gfc_current_ns
->proc_name
5606 && sym
->attr
.dimension
5607 && (sym
->ns
!= gfc_current_ns
5608 || sym
->attr
.use_assoc
5609 || sym
->attr
.in_common
))
5610 gfc_current_ns
->proc_name
->attr
.array_outer_dependency
= 1;
5613 if (t
&& !resolve_procedure_expression (e
))
5616 /* F2008, C617 and C1229. */
5617 if (!inquiry_argument
&& (e
->ts
.type
== BT_CLASS
|| e
->ts
.type
== BT_DERIVED
)
5618 && gfc_is_coindexed (e
))
5620 gfc_ref
*ref
, *ref2
= NULL
;
5622 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
5624 if (ref
->type
== REF_COMPONENT
)
5626 if (ref
->type
== REF_ARRAY
&& ref
->u
.ar
.codimen
> 0)
5630 for ( ; ref
; ref
= ref
->next
)
5631 if (ref
->type
== REF_COMPONENT
)
5634 /* Expression itself is not coindexed object. */
5635 if (ref
&& e
->ts
.type
== BT_CLASS
)
5637 gfc_error ("Polymorphic subobject of coindexed object at %L",
5642 /* Expression itself is coindexed object. */
5646 c
= ref2
? ref2
->u
.c
.component
: e
->symtree
->n
.sym
->components
;
5647 for ( ; c
; c
= c
->next
)
5648 if (c
->attr
.allocatable
&& c
->ts
.type
== BT_CLASS
)
5650 gfc_error ("Coindexed object with polymorphic allocatable "
5651 "subcomponent at %L", &e
->where
);
5659 expression_rank (e
);
5661 if (t
&& flag_coarray
== GFC_FCOARRAY_LIB
&& gfc_is_coindexed (e
))
5662 add_caf_get_intrinsic (e
);
5664 /* Simplify cases where access to a parameter array results in a
5665 single constant. Suppress errors since those will have been
5666 issued before, as warnings. */
5667 if (e
->rank
== 0 && sym
->as
&& sym
->attr
.flavor
== FL_PARAMETER
)
5669 gfc_push_suppress_errors ();
5670 gfc_simplify_expr (e
, 1);
5671 gfc_pop_suppress_errors ();
5678 /* Checks to see that the correct symbol has been host associated.
5679 The only situation where this arises is that in which a twice
5680 contained function is parsed after the host association is made.
5681 Therefore, on detecting this, change the symbol in the expression
5682 and convert the array reference into an actual arglist if the old
5683 symbol is a variable. */
5685 check_host_association (gfc_expr
*e
)
5687 gfc_symbol
*sym
, *old_sym
;
5691 gfc_actual_arglist
*arg
, *tail
= NULL
;
5692 bool retval
= e
->expr_type
== EXPR_FUNCTION
;
5694 /* If the expression is the result of substitution in
5695 interface.c(gfc_extend_expr) because there is no way in
5696 which the host association can be wrong. */
5697 if (e
->symtree
== NULL
5698 || e
->symtree
->n
.sym
== NULL
5699 || e
->user_operator
)
5702 old_sym
= e
->symtree
->n
.sym
;
5704 if (gfc_current_ns
->parent
5705 && old_sym
->ns
!= gfc_current_ns
)
5707 /* Use the 'USE' name so that renamed module symbols are
5708 correctly handled. */
5709 gfc_find_symbol (e
->symtree
->name
, gfc_current_ns
, 1, &sym
);
5711 if (sym
&& old_sym
!= sym
5712 && sym
->ts
.type
== old_sym
->ts
.type
5713 && sym
->attr
.flavor
== FL_PROCEDURE
5714 && sym
->attr
.contained
)
5716 /* Clear the shape, since it might not be valid. */
5717 gfc_free_shape (&e
->shape
, e
->rank
);
5719 /* Give the expression the right symtree! */
5720 gfc_find_sym_tree (e
->symtree
->name
, NULL
, 1, &st
);
5721 gcc_assert (st
!= NULL
);
5723 if (old_sym
->attr
.flavor
== FL_PROCEDURE
5724 || e
->expr_type
== EXPR_FUNCTION
)
5726 /* Original was function so point to the new symbol, since
5727 the actual argument list is already attached to the
5729 e
->value
.function
.esym
= NULL
;
5734 /* Original was variable so convert array references into
5735 an actual arglist. This does not need any checking now
5736 since resolve_function will take care of it. */
5737 e
->value
.function
.actual
= NULL
;
5738 e
->expr_type
= EXPR_FUNCTION
;
5741 /* Ambiguity will not arise if the array reference is not
5742 the last reference. */
5743 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
5744 if (ref
->type
== REF_ARRAY
&& ref
->next
== NULL
)
5747 gcc_assert (ref
->type
== REF_ARRAY
);
5749 /* Grab the start expressions from the array ref and
5750 copy them into actual arguments. */
5751 for (n
= 0; n
< ref
->u
.ar
.dimen
; n
++)
5753 arg
= gfc_get_actual_arglist ();
5754 arg
->expr
= gfc_copy_expr (ref
->u
.ar
.start
[n
]);
5755 if (e
->value
.function
.actual
== NULL
)
5756 tail
= e
->value
.function
.actual
= arg
;
5764 /* Dump the reference list and set the rank. */
5765 gfc_free_ref_list (e
->ref
);
5767 e
->rank
= sym
->as
? sym
->as
->rank
: 0;
5770 gfc_resolve_expr (e
);
5774 /* This might have changed! */
5775 return e
->expr_type
== EXPR_FUNCTION
;
5780 gfc_resolve_character_operator (gfc_expr
*e
)
5782 gfc_expr
*op1
= e
->value
.op
.op1
;
5783 gfc_expr
*op2
= e
->value
.op
.op2
;
5784 gfc_expr
*e1
= NULL
;
5785 gfc_expr
*e2
= NULL
;
5787 gcc_assert (e
->value
.op
.op
== INTRINSIC_CONCAT
);
5789 if (op1
->ts
.u
.cl
&& op1
->ts
.u
.cl
->length
)
5790 e1
= gfc_copy_expr (op1
->ts
.u
.cl
->length
);
5791 else if (op1
->expr_type
== EXPR_CONSTANT
)
5792 e1
= gfc_get_int_expr (gfc_charlen_int_kind
, NULL
,
5793 op1
->value
.character
.length
);
5795 if (op2
->ts
.u
.cl
&& op2
->ts
.u
.cl
->length
)
5796 e2
= gfc_copy_expr (op2
->ts
.u
.cl
->length
);
5797 else if (op2
->expr_type
== EXPR_CONSTANT
)
5798 e2
= gfc_get_int_expr (gfc_charlen_int_kind
, NULL
,
5799 op2
->value
.character
.length
);
5801 e
->ts
.u
.cl
= gfc_new_charlen (gfc_current_ns
, NULL
);
5811 e
->ts
.u
.cl
->length
= gfc_add (e1
, e2
);
5812 e
->ts
.u
.cl
->length
->ts
.type
= BT_INTEGER
;
5813 e
->ts
.u
.cl
->length
->ts
.kind
= gfc_charlen_int_kind
;
5814 gfc_simplify_expr (e
->ts
.u
.cl
->length
, 0);
5815 gfc_resolve_expr (e
->ts
.u
.cl
->length
);
5821 /* Ensure that an character expression has a charlen and, if possible, a
5822 length expression. */
5825 fixup_charlen (gfc_expr
*e
)
5827 /* The cases fall through so that changes in expression type and the need
5828 for multiple fixes are picked up. In all circumstances, a charlen should
5829 be available for the middle end to hang a backend_decl on. */
5830 switch (e
->expr_type
)
5833 gfc_resolve_character_operator (e
);
5837 if (e
->expr_type
== EXPR_ARRAY
)
5838 gfc_resolve_character_array_constructor (e
);
5841 case EXPR_SUBSTRING
:
5842 if (!e
->ts
.u
.cl
&& e
->ref
)
5843 gfc_resolve_substring_charlen (e
);
5848 e
->ts
.u
.cl
= gfc_new_charlen (gfc_current_ns
, NULL
);
5855 /* Update an actual argument to include the passed-object for type-bound
5856 procedures at the right position. */
5858 static gfc_actual_arglist
*
5859 update_arglist_pass (gfc_actual_arglist
* lst
, gfc_expr
* po
, unsigned argpos
,
5862 gcc_assert (argpos
> 0);
5866 gfc_actual_arglist
* result
;
5868 result
= gfc_get_actual_arglist ();
5872 result
->name
= name
;
5878 lst
->next
= update_arglist_pass (lst
->next
, po
, argpos
- 1, name
);
5880 lst
= update_arglist_pass (NULL
, po
, argpos
- 1, name
);
5885 /* Extract the passed-object from an EXPR_COMPCALL (a copy of it). */
5888 extract_compcall_passed_object (gfc_expr
* e
)
5892 gcc_assert (e
->expr_type
== EXPR_COMPCALL
);
5894 if (e
->value
.compcall
.base_object
)
5895 po
= gfc_copy_expr (e
->value
.compcall
.base_object
);
5898 po
= gfc_get_expr ();
5899 po
->expr_type
= EXPR_VARIABLE
;
5900 po
->symtree
= e
->symtree
;
5901 po
->ref
= gfc_copy_ref (e
->ref
);
5902 po
->where
= e
->where
;
5905 if (!gfc_resolve_expr (po
))
5912 /* Update the arglist of an EXPR_COMPCALL expression to include the
5916 update_compcall_arglist (gfc_expr
* e
)
5919 gfc_typebound_proc
* tbp
;
5921 tbp
= e
->value
.compcall
.tbp
;
5926 po
= extract_compcall_passed_object (e
);
5930 if (tbp
->nopass
|| e
->value
.compcall
.ignore_pass
)
5936 if (tbp
->pass_arg_num
<= 0)
5939 e
->value
.compcall
.actual
= update_arglist_pass (e
->value
.compcall
.actual
, po
,
5947 /* Extract the passed object from a PPC call (a copy of it). */
5950 extract_ppc_passed_object (gfc_expr
*e
)
5955 po
= gfc_get_expr ();
5956 po
->expr_type
= EXPR_VARIABLE
;
5957 po
->symtree
= e
->symtree
;
5958 po
->ref
= gfc_copy_ref (e
->ref
);
5959 po
->where
= e
->where
;
5961 /* Remove PPC reference. */
5963 while ((*ref
)->next
)
5964 ref
= &(*ref
)->next
;
5965 gfc_free_ref_list (*ref
);
5968 if (!gfc_resolve_expr (po
))
5975 /* Update the actual arglist of a procedure pointer component to include the
5979 update_ppc_arglist (gfc_expr
* e
)
5983 gfc_typebound_proc
* tb
;
5985 ppc
= gfc_get_proc_ptr_comp (e
);
5993 else if (tb
->nopass
)
5996 po
= extract_ppc_passed_object (e
);
6003 gfc_error ("Passed-object at %L must be scalar", &e
->where
);
6008 if (po
->ts
.type
== BT_DERIVED
&& po
->ts
.u
.derived
->attr
.abstract
)
6010 gfc_error ("Base object for procedure-pointer component call at %L is of"
6011 " ABSTRACT type %qs", &e
->where
, po
->ts
.u
.derived
->name
);
6015 gcc_assert (tb
->pass_arg_num
> 0);
6016 e
->value
.compcall
.actual
= update_arglist_pass (e
->value
.compcall
.actual
, po
,
6024 /* Check that the object a TBP is called on is valid, i.e. it must not be
6025 of ABSTRACT type (as in subobject%abstract_parent%tbp()). */
6028 check_typebound_baseobject (gfc_expr
* e
)
6031 bool return_value
= false;
6033 base
= extract_compcall_passed_object (e
);
6037 gcc_assert (base
->ts
.type
== BT_DERIVED
|| base
->ts
.type
== BT_CLASS
);
6039 if (base
->ts
.type
== BT_CLASS
&& !gfc_expr_attr (base
).class_ok
)
6043 if (base
->ts
.type
== BT_DERIVED
&& base
->ts
.u
.derived
->attr
.abstract
)
6045 gfc_error ("Base object for type-bound procedure call at %L is of"
6046 " ABSTRACT type %qs", &e
->where
, base
->ts
.u
.derived
->name
);
6050 /* F08:C1230. If the procedure called is NOPASS,
6051 the base object must be scalar. */
6052 if (e
->value
.compcall
.tbp
->nopass
&& base
->rank
!= 0)
6054 gfc_error ("Base object for NOPASS type-bound procedure call at %L must"
6055 " be scalar", &e
->where
);
6059 return_value
= true;
6062 gfc_free_expr (base
);
6063 return return_value
;
6067 /* Resolve a call to a type-bound procedure, either function or subroutine,
6068 statically from the data in an EXPR_COMPCALL expression. The adapted
6069 arglist and the target-procedure symtree are returned. */
6072 resolve_typebound_static (gfc_expr
* e
, gfc_symtree
** target
,
6073 gfc_actual_arglist
** actual
)
6075 gcc_assert (e
->expr_type
== EXPR_COMPCALL
);
6076 gcc_assert (!e
->value
.compcall
.tbp
->is_generic
);
6078 /* Update the actual arglist for PASS. */
6079 if (!update_compcall_arglist (e
))
6082 *actual
= e
->value
.compcall
.actual
;
6083 *target
= e
->value
.compcall
.tbp
->u
.specific
;
6085 gfc_free_ref_list (e
->ref
);
6087 e
->value
.compcall
.actual
= NULL
;
6089 /* If we find a deferred typebound procedure, check for derived types
6090 that an overriding typebound procedure has not been missed. */
6091 if (e
->value
.compcall
.name
6092 && !e
->value
.compcall
.tbp
->non_overridable
6093 && e
->value
.compcall
.base_object
6094 && e
->value
.compcall
.base_object
->ts
.type
== BT_DERIVED
)
6097 gfc_symbol
*derived
;
6099 /* Use the derived type of the base_object. */
6100 derived
= e
->value
.compcall
.base_object
->ts
.u
.derived
;
6103 /* If necessary, go through the inheritance chain. */
6104 while (!st
&& derived
)
6106 /* Look for the typebound procedure 'name'. */
6107 if (derived
->f2k_derived
&& derived
->f2k_derived
->tb_sym_root
)
6108 st
= gfc_find_symtree (derived
->f2k_derived
->tb_sym_root
,
6109 e
->value
.compcall
.name
);
6111 derived
= gfc_get_derived_super_type (derived
);
6114 /* Now find the specific name in the derived type namespace. */
6115 if (st
&& st
->n
.tb
&& st
->n
.tb
->u
.specific
)
6116 gfc_find_sym_tree (st
->n
.tb
->u
.specific
->name
,
6117 derived
->ns
, 1, &st
);
6125 /* Get the ultimate declared type from an expression. In addition,
6126 return the last class/derived type reference and the copy of the
6127 reference list. If check_types is set true, derived types are
6128 identified as well as class references. */
6130 get_declared_from_expr (gfc_ref
**class_ref
, gfc_ref
**new_ref
,
6131 gfc_expr
*e
, bool check_types
)
6133 gfc_symbol
*declared
;
6140 *new_ref
= gfc_copy_ref (e
->ref
);
6142 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
6144 if (ref
->type
!= REF_COMPONENT
)
6147 if ((ref
->u
.c
.component
->ts
.type
== BT_CLASS
6148 || (check_types
&& gfc_bt_struct (ref
->u
.c
.component
->ts
.type
)))
6149 && ref
->u
.c
.component
->attr
.flavor
!= FL_PROCEDURE
)
6151 declared
= ref
->u
.c
.component
->ts
.u
.derived
;
6157 if (declared
== NULL
)
6158 declared
= e
->symtree
->n
.sym
->ts
.u
.derived
;
6164 /* Given an EXPR_COMPCALL calling a GENERIC typebound procedure, figure out
6165 which of the specific bindings (if any) matches the arglist and transform
6166 the expression into a call of that binding. */
6169 resolve_typebound_generic_call (gfc_expr
* e
, const char **name
)
6171 gfc_typebound_proc
* genproc
;
6172 const char* genname
;
6174 gfc_symbol
*derived
;
6176 gcc_assert (e
->expr_type
== EXPR_COMPCALL
);
6177 genname
= e
->value
.compcall
.name
;
6178 genproc
= e
->value
.compcall
.tbp
;
6180 if (!genproc
->is_generic
)
6183 /* Try the bindings on this type and in the inheritance hierarchy. */
6184 for (; genproc
; genproc
= genproc
->overridden
)
6188 gcc_assert (genproc
->is_generic
);
6189 for (g
= genproc
->u
.generic
; g
; g
= g
->next
)
6192 gfc_actual_arglist
* args
;
6195 gcc_assert (g
->specific
);
6197 if (g
->specific
->error
)
6200 target
= g
->specific
->u
.specific
->n
.sym
;
6202 /* Get the right arglist by handling PASS/NOPASS. */
6203 args
= gfc_copy_actual_arglist (e
->value
.compcall
.actual
);
6204 if (!g
->specific
->nopass
)
6207 po
= extract_compcall_passed_object (e
);
6210 gfc_free_actual_arglist (args
);
6214 gcc_assert (g
->specific
->pass_arg_num
> 0);
6215 gcc_assert (!g
->specific
->error
);
6216 args
= update_arglist_pass (args
, po
, g
->specific
->pass_arg_num
,
6217 g
->specific
->pass_arg
);
6219 resolve_actual_arglist (args
, target
->attr
.proc
,
6220 is_external_proc (target
)
6221 && gfc_sym_get_dummy_args (target
) == NULL
);
6223 /* Check if this arglist matches the formal. */
6224 matches
= gfc_arglist_matches_symbol (&args
, target
);
6226 /* Clean up and break out of the loop if we've found it. */
6227 gfc_free_actual_arglist (args
);
6230 e
->value
.compcall
.tbp
= g
->specific
;
6231 genname
= g
->specific_st
->name
;
6232 /* Pass along the name for CLASS methods, where the vtab
6233 procedure pointer component has to be referenced. */
6241 /* Nothing matching found! */
6242 gfc_error ("Found no matching specific binding for the call to the GENERIC"
6243 " %qs at %L", genname
, &e
->where
);
6247 /* Make sure that we have the right specific instance for the name. */
6248 derived
= get_declared_from_expr (NULL
, NULL
, e
, true);
6250 st
= gfc_find_typebound_proc (derived
, NULL
, genname
, true, &e
->where
);
6252 e
->value
.compcall
.tbp
= st
->n
.tb
;
6258 /* Resolve a call to a type-bound subroutine. */
6261 resolve_typebound_call (gfc_code
* c
, const char **name
, bool *overridable
)
6263 gfc_actual_arglist
* newactual
;
6264 gfc_symtree
* target
;
6266 /* Check that's really a SUBROUTINE. */
6267 if (!c
->expr1
->value
.compcall
.tbp
->subroutine
)
6269 if (!c
->expr1
->value
.compcall
.tbp
->is_generic
6270 && c
->expr1
->value
.compcall
.tbp
->u
.specific
6271 && c
->expr1
->value
.compcall
.tbp
->u
.specific
->n
.sym
6272 && c
->expr1
->value
.compcall
.tbp
->u
.specific
->n
.sym
->attr
.subroutine
)
6273 c
->expr1
->value
.compcall
.tbp
->subroutine
= 1;
6276 gfc_error ("%qs at %L should be a SUBROUTINE",
6277 c
->expr1
->value
.compcall
.name
, &c
->loc
);
6282 if (!check_typebound_baseobject (c
->expr1
))
6285 /* Pass along the name for CLASS methods, where the vtab
6286 procedure pointer component has to be referenced. */
6288 *name
= c
->expr1
->value
.compcall
.name
;
6290 if (!resolve_typebound_generic_call (c
->expr1
, name
))
6293 /* Pass along the NON_OVERRIDABLE attribute of the specific TBP. */
6295 *overridable
= !c
->expr1
->value
.compcall
.tbp
->non_overridable
;
6297 /* Transform into an ordinary EXEC_CALL for now. */
6299 if (!resolve_typebound_static (c
->expr1
, &target
, &newactual
))
6302 c
->ext
.actual
= newactual
;
6303 c
->symtree
= target
;
6304 c
->op
= (c
->expr1
->value
.compcall
.assign
? EXEC_ASSIGN_CALL
: EXEC_CALL
);
6306 gcc_assert (!c
->expr1
->ref
&& !c
->expr1
->value
.compcall
.actual
);
6308 gfc_free_expr (c
->expr1
);
6309 c
->expr1
= gfc_get_expr ();
6310 c
->expr1
->expr_type
= EXPR_FUNCTION
;
6311 c
->expr1
->symtree
= target
;
6312 c
->expr1
->where
= c
->loc
;
6314 return resolve_call (c
);
6318 /* Resolve a component-call expression. */
6320 resolve_compcall (gfc_expr
* e
, const char **name
)
6322 gfc_actual_arglist
* newactual
;
6323 gfc_symtree
* target
;
6325 /* Check that's really a FUNCTION. */
6326 if (!e
->value
.compcall
.tbp
->function
)
6328 gfc_error ("%qs at %L should be a FUNCTION",
6329 e
->value
.compcall
.name
, &e
->where
);
6333 /* These must not be assign-calls! */
6334 gcc_assert (!e
->value
.compcall
.assign
);
6336 if (!check_typebound_baseobject (e
))
6339 /* Pass along the name for CLASS methods, where the vtab
6340 procedure pointer component has to be referenced. */
6342 *name
= e
->value
.compcall
.name
;
6344 if (!resolve_typebound_generic_call (e
, name
))
6346 gcc_assert (!e
->value
.compcall
.tbp
->is_generic
);
6348 /* Take the rank from the function's symbol. */
6349 if (e
->value
.compcall
.tbp
->u
.specific
->n
.sym
->as
)
6350 e
->rank
= e
->value
.compcall
.tbp
->u
.specific
->n
.sym
->as
->rank
;
6352 /* For now, we simply transform it into an EXPR_FUNCTION call with the same
6353 arglist to the TBP's binding target. */
6355 if (!resolve_typebound_static (e
, &target
, &newactual
))
6358 e
->value
.function
.actual
= newactual
;
6359 e
->value
.function
.name
= NULL
;
6360 e
->value
.function
.esym
= target
->n
.sym
;
6361 e
->value
.function
.isym
= NULL
;
6362 e
->symtree
= target
;
6363 e
->ts
= target
->n
.sym
->ts
;
6364 e
->expr_type
= EXPR_FUNCTION
;
6366 /* Resolution is not necessary if this is a class subroutine; this
6367 function only has to identify the specific proc. Resolution of
6368 the call will be done next in resolve_typebound_call. */
6369 return gfc_resolve_expr (e
);
6373 static bool resolve_fl_derived (gfc_symbol
*sym
);
6376 /* Resolve a typebound function, or 'method'. First separate all
6377 the non-CLASS references by calling resolve_compcall directly. */
6380 resolve_typebound_function (gfc_expr
* e
)
6382 gfc_symbol
*declared
;
6394 /* Deal with typebound operators for CLASS objects. */
6395 expr
= e
->value
.compcall
.base_object
;
6396 overridable
= !e
->value
.compcall
.tbp
->non_overridable
;
6397 if (expr
&& expr
->ts
.type
== BT_CLASS
&& e
->value
.compcall
.name
)
6399 /* If the base_object is not a variable, the corresponding actual
6400 argument expression must be stored in e->base_expression so
6401 that the corresponding tree temporary can be used as the base
6402 object in gfc_conv_procedure_call. */
6403 if (expr
->expr_type
!= EXPR_VARIABLE
)
6405 gfc_actual_arglist
*args
;
6407 for (args
= e
->value
.function
.actual
; args
; args
= args
->next
)
6409 if (expr
== args
->expr
)
6414 /* Since the typebound operators are generic, we have to ensure
6415 that any delays in resolution are corrected and that the vtab
6418 declared
= ts
.u
.derived
;
6419 c
= gfc_find_component (declared
, "_vptr", true, true, NULL
);
6420 if (c
->ts
.u
.derived
== NULL
)
6421 c
->ts
.u
.derived
= gfc_find_derived_vtab (declared
);
6423 if (!resolve_compcall (e
, &name
))
6426 /* Use the generic name if it is there. */
6427 name
= name
? name
: e
->value
.function
.esym
->name
;
6428 e
->symtree
= expr
->symtree
;
6429 e
->ref
= gfc_copy_ref (expr
->ref
);
6430 get_declared_from_expr (&class_ref
, NULL
, e
, false);
6432 /* Trim away the extraneous references that emerge from nested
6433 use of interface.c (extend_expr). */
6434 if (class_ref
&& class_ref
->next
)
6436 gfc_free_ref_list (class_ref
->next
);
6437 class_ref
->next
= NULL
;
6439 else if (e
->ref
&& !class_ref
&& expr
->ts
.type
!= BT_CLASS
)
6441 gfc_free_ref_list (e
->ref
);
6445 gfc_add_vptr_component (e
);
6446 gfc_add_component_ref (e
, name
);
6447 e
->value
.function
.esym
= NULL
;
6448 if (expr
->expr_type
!= EXPR_VARIABLE
)
6449 e
->base_expr
= expr
;
6454 return resolve_compcall (e
, NULL
);
6456 if (!resolve_ref (e
))
6459 /* Get the CLASS declared type. */
6460 declared
= get_declared_from_expr (&class_ref
, &new_ref
, e
, true);
6462 if (!resolve_fl_derived (declared
))
6465 /* Weed out cases of the ultimate component being a derived type. */
6466 if ((class_ref
&& gfc_bt_struct (class_ref
->u
.c
.component
->ts
.type
))
6467 || (!class_ref
&& st
->n
.sym
->ts
.type
!= BT_CLASS
))
6469 gfc_free_ref_list (new_ref
);
6470 return resolve_compcall (e
, NULL
);
6473 c
= gfc_find_component (declared
, "_data", true, true, NULL
);
6474 declared
= c
->ts
.u
.derived
;
6476 /* Treat the call as if it is a typebound procedure, in order to roll
6477 out the correct name for the specific function. */
6478 if (!resolve_compcall (e
, &name
))
6480 gfc_free_ref_list (new_ref
);
6487 /* Convert the expression to a procedure pointer component call. */
6488 e
->value
.function
.esym
= NULL
;
6494 /* '_vptr' points to the vtab, which contains the procedure pointers. */
6495 gfc_add_vptr_component (e
);
6496 gfc_add_component_ref (e
, name
);
6498 /* Recover the typespec for the expression. This is really only
6499 necessary for generic procedures, where the additional call
6500 to gfc_add_component_ref seems to throw the collection of the
6501 correct typespec. */
6505 gfc_free_ref_list (new_ref
);
6510 /* Resolve a typebound subroutine, or 'method'. First separate all
6511 the non-CLASS references by calling resolve_typebound_call
6515 resolve_typebound_subroutine (gfc_code
*code
)
6517 gfc_symbol
*declared
;
6527 st
= code
->expr1
->symtree
;
6529 /* Deal with typebound operators for CLASS objects. */
6530 expr
= code
->expr1
->value
.compcall
.base_object
;
6531 overridable
= !code
->expr1
->value
.compcall
.tbp
->non_overridable
;
6532 if (expr
&& expr
->ts
.type
== BT_CLASS
&& code
->expr1
->value
.compcall
.name
)
6534 /* If the base_object is not a variable, the corresponding actual
6535 argument expression must be stored in e->base_expression so
6536 that the corresponding tree temporary can be used as the base
6537 object in gfc_conv_procedure_call. */
6538 if (expr
->expr_type
!= EXPR_VARIABLE
)
6540 gfc_actual_arglist
*args
;
6542 args
= code
->expr1
->value
.function
.actual
;
6543 for (; args
; args
= args
->next
)
6544 if (expr
== args
->expr
)
6548 /* Since the typebound operators are generic, we have to ensure
6549 that any delays in resolution are corrected and that the vtab
6551 declared
= expr
->ts
.u
.derived
;
6552 c
= gfc_find_component (declared
, "_vptr", true, true, NULL
);
6553 if (c
->ts
.u
.derived
== NULL
)
6554 c
->ts
.u
.derived
= gfc_find_derived_vtab (declared
);
6556 if (!resolve_typebound_call (code
, &name
, NULL
))
6559 /* Use the generic name if it is there. */
6560 name
= name
? name
: code
->expr1
->value
.function
.esym
->name
;
6561 code
->expr1
->symtree
= expr
->symtree
;
6562 code
->expr1
->ref
= gfc_copy_ref (expr
->ref
);
6564 /* Trim away the extraneous references that emerge from nested
6565 use of interface.c (extend_expr). */
6566 get_declared_from_expr (&class_ref
, NULL
, code
->expr1
, false);
6567 if (class_ref
&& class_ref
->next
)
6569 gfc_free_ref_list (class_ref
->next
);
6570 class_ref
->next
= NULL
;
6572 else if (code
->expr1
->ref
&& !class_ref
)
6574 gfc_free_ref_list (code
->expr1
->ref
);
6575 code
->expr1
->ref
= NULL
;
6578 /* Now use the procedure in the vtable. */
6579 gfc_add_vptr_component (code
->expr1
);
6580 gfc_add_component_ref (code
->expr1
, name
);
6581 code
->expr1
->value
.function
.esym
= NULL
;
6582 if (expr
->expr_type
!= EXPR_VARIABLE
)
6583 code
->expr1
->base_expr
= expr
;
6588 return resolve_typebound_call (code
, NULL
, NULL
);
6590 if (!resolve_ref (code
->expr1
))
6593 /* Get the CLASS declared type. */
6594 get_declared_from_expr (&class_ref
, &new_ref
, code
->expr1
, true);
6596 /* Weed out cases of the ultimate component being a derived type. */
6597 if ((class_ref
&& gfc_bt_struct (class_ref
->u
.c
.component
->ts
.type
))
6598 || (!class_ref
&& st
->n
.sym
->ts
.type
!= BT_CLASS
))
6600 gfc_free_ref_list (new_ref
);
6601 return resolve_typebound_call (code
, NULL
, NULL
);
6604 if (!resolve_typebound_call (code
, &name
, &overridable
))
6606 gfc_free_ref_list (new_ref
);
6609 ts
= code
->expr1
->ts
;
6613 /* Convert the expression to a procedure pointer component call. */
6614 code
->expr1
->value
.function
.esym
= NULL
;
6615 code
->expr1
->symtree
= st
;
6618 code
->expr1
->ref
= new_ref
;
6620 /* '_vptr' points to the vtab, which contains the procedure pointers. */
6621 gfc_add_vptr_component (code
->expr1
);
6622 gfc_add_component_ref (code
->expr1
, name
);
6624 /* Recover the typespec for the expression. This is really only
6625 necessary for generic procedures, where the additional call
6626 to gfc_add_component_ref seems to throw the collection of the
6627 correct typespec. */
6628 code
->expr1
->ts
= ts
;
6631 gfc_free_ref_list (new_ref
);
6637 /* Resolve a CALL to a Procedure Pointer Component (Subroutine). */
6640 resolve_ppc_call (gfc_code
* c
)
6642 gfc_component
*comp
;
6644 comp
= gfc_get_proc_ptr_comp (c
->expr1
);
6645 gcc_assert (comp
!= NULL
);
6647 c
->resolved_sym
= c
->expr1
->symtree
->n
.sym
;
6648 c
->expr1
->expr_type
= EXPR_VARIABLE
;
6650 if (!comp
->attr
.subroutine
)
6651 gfc_add_subroutine (&comp
->attr
, comp
->name
, &c
->expr1
->where
);
6653 if (!resolve_ref (c
->expr1
))
6656 if (!update_ppc_arglist (c
->expr1
))
6659 c
->ext
.actual
= c
->expr1
->value
.compcall
.actual
;
6661 if (!resolve_actual_arglist (c
->ext
.actual
, comp
->attr
.proc
,
6662 !(comp
->ts
.interface
6663 && comp
->ts
.interface
->formal
)))
6666 if (!pure_subroutine (comp
->ts
.interface
, comp
->name
, &c
->expr1
->where
))
6669 gfc_ppc_use (comp
, &c
->expr1
->value
.compcall
.actual
, &c
->expr1
->where
);
6675 /* Resolve a Function Call to a Procedure Pointer Component (Function). */
6678 resolve_expr_ppc (gfc_expr
* e
)
6680 gfc_component
*comp
;
6682 comp
= gfc_get_proc_ptr_comp (e
);
6683 gcc_assert (comp
!= NULL
);
6685 /* Convert to EXPR_FUNCTION. */
6686 e
->expr_type
= EXPR_FUNCTION
;
6687 e
->value
.function
.isym
= NULL
;
6688 e
->value
.function
.actual
= e
->value
.compcall
.actual
;
6690 if (comp
->as
!= NULL
)
6691 e
->rank
= comp
->as
->rank
;
6693 if (!comp
->attr
.function
)
6694 gfc_add_function (&comp
->attr
, comp
->name
, &e
->where
);
6696 if (!resolve_ref (e
))
6699 if (!resolve_actual_arglist (e
->value
.function
.actual
, comp
->attr
.proc
,
6700 !(comp
->ts
.interface
6701 && comp
->ts
.interface
->formal
)))
6704 if (!update_ppc_arglist (e
))
6707 if (!check_pure_function(e
))
6710 gfc_ppc_use (comp
, &e
->value
.compcall
.actual
, &e
->where
);
6717 gfc_is_expandable_expr (gfc_expr
*e
)
6719 gfc_constructor
*con
;
6721 if (e
->expr_type
== EXPR_ARRAY
)
6723 /* Traverse the constructor looking for variables that are flavor
6724 parameter. Parameters must be expanded since they are fully used at
6726 con
= gfc_constructor_first (e
->value
.constructor
);
6727 for (; con
; con
= gfc_constructor_next (con
))
6729 if (con
->expr
->expr_type
== EXPR_VARIABLE
6730 && con
->expr
->symtree
6731 && (con
->expr
->symtree
->n
.sym
->attr
.flavor
== FL_PARAMETER
6732 || con
->expr
->symtree
->n
.sym
->attr
.flavor
== FL_VARIABLE
))
6734 if (con
->expr
->expr_type
== EXPR_ARRAY
6735 && gfc_is_expandable_expr (con
->expr
))
6744 /* Sometimes variables in specification expressions of the result
6745 of module procedures in submodules wind up not being the 'real'
6746 dummy. Find this, if possible, in the namespace of the first
6750 fixup_unique_dummy (gfc_expr
*e
)
6752 gfc_symtree
*st
= NULL
;
6753 gfc_symbol
*s
= NULL
;
6755 if (e
->symtree
->n
.sym
->ns
->proc_name
6756 && e
->symtree
->n
.sym
->ns
->proc_name
->formal
)
6757 s
= e
->symtree
->n
.sym
->ns
->proc_name
->formal
->sym
;
6760 st
= gfc_find_symtree (s
->ns
->sym_root
, e
->symtree
->n
.sym
->name
);
6763 && st
->n
.sym
!= NULL
6764 && st
->n
.sym
->attr
.dummy
)
6768 /* Resolve an expression. That is, make sure that types of operands agree
6769 with their operators, intrinsic operators are converted to function calls
6770 for overloaded types and unresolved function references are resolved. */
6773 gfc_resolve_expr (gfc_expr
*e
)
6776 bool inquiry_save
, actual_arg_save
, first_actual_arg_save
;
6781 /* inquiry_argument only applies to variables. */
6782 inquiry_save
= inquiry_argument
;
6783 actual_arg_save
= actual_arg
;
6784 first_actual_arg_save
= first_actual_arg
;
6786 if (e
->expr_type
!= EXPR_VARIABLE
)
6788 inquiry_argument
= false;
6790 first_actual_arg
= false;
6792 else if (e
->symtree
!= NULL
6793 && *e
->symtree
->name
== '@'
6794 && e
->symtree
->n
.sym
->attr
.dummy
)
6796 /* Deal with submodule specification expressions that are not
6797 found to be referenced in module.c(read_cleanup). */
6798 fixup_unique_dummy (e
);
6801 switch (e
->expr_type
)
6804 t
= resolve_operator (e
);
6810 if (check_host_association (e
))
6811 t
= resolve_function (e
);
6813 t
= resolve_variable (e
);
6815 if (e
->ts
.type
== BT_CHARACTER
&& e
->ts
.u
.cl
== NULL
&& e
->ref
6816 && e
->ref
->type
!= REF_SUBSTRING
)
6817 gfc_resolve_substring_charlen (e
);
6822 t
= resolve_typebound_function (e
);
6825 case EXPR_SUBSTRING
:
6826 t
= resolve_ref (e
);
6835 t
= resolve_expr_ppc (e
);
6840 if (!resolve_ref (e
))
6843 t
= gfc_resolve_array_constructor (e
);
6844 /* Also try to expand a constructor. */
6847 expression_rank (e
);
6848 if (gfc_is_constant_expr (e
) || gfc_is_expandable_expr (e
))
6849 gfc_expand_constructor (e
, false);
6852 /* This provides the opportunity for the length of constructors with
6853 character valued function elements to propagate the string length
6854 to the expression. */
6855 if (t
&& e
->ts
.type
== BT_CHARACTER
)
6857 /* For efficiency, we call gfc_expand_constructor for BT_CHARACTER
6858 here rather then add a duplicate test for it above. */
6859 gfc_expand_constructor (e
, false);
6860 t
= gfc_resolve_character_array_constructor (e
);
6865 case EXPR_STRUCTURE
:
6866 t
= resolve_ref (e
);
6870 t
= resolve_structure_cons (e
, 0);
6874 t
= gfc_simplify_expr (e
, 0);
6878 gfc_internal_error ("gfc_resolve_expr(): Bad expression type");
6881 if (e
->ts
.type
== BT_CHARACTER
&& t
&& !e
->ts
.u
.cl
)
6884 inquiry_argument
= inquiry_save
;
6885 actual_arg
= actual_arg_save
;
6886 first_actual_arg
= first_actual_arg_save
;
6892 /* Resolve an expression from an iterator. They must be scalar and have
6893 INTEGER or (optionally) REAL type. */
6896 gfc_resolve_iterator_expr (gfc_expr
*expr
, bool real_ok
,
6897 const char *name_msgid
)
6899 if (!gfc_resolve_expr (expr
))
6902 if (expr
->rank
!= 0)
6904 gfc_error ("%s at %L must be a scalar", _(name_msgid
), &expr
->where
);
6908 if (expr
->ts
.type
!= BT_INTEGER
)
6910 if (expr
->ts
.type
== BT_REAL
)
6913 return gfc_notify_std (GFC_STD_F95_DEL
,
6914 "%s at %L must be integer",
6915 _(name_msgid
), &expr
->where
);
6918 gfc_error ("%s at %L must be INTEGER", _(name_msgid
),
6925 gfc_error ("%s at %L must be INTEGER", _(name_msgid
), &expr
->where
);
6933 /* Resolve the expressions in an iterator structure. If REAL_OK is
6934 false allow only INTEGER type iterators, otherwise allow REAL types.
6935 Set own_scope to true for ac-implied-do and data-implied-do as those
6936 have a separate scope such that, e.g., a INTENT(IN) doesn't apply. */
6939 gfc_resolve_iterator (gfc_iterator
*iter
, bool real_ok
, bool own_scope
)
6941 if (!gfc_resolve_iterator_expr (iter
->var
, real_ok
, "Loop variable"))
6944 if (!gfc_check_vardef_context (iter
->var
, false, false, own_scope
,
6945 _("iterator variable")))
6948 if (!gfc_resolve_iterator_expr (iter
->start
, real_ok
,
6949 "Start expression in DO loop"))
6952 if (!gfc_resolve_iterator_expr (iter
->end
, real_ok
,
6953 "End expression in DO loop"))
6956 if (!gfc_resolve_iterator_expr (iter
->step
, real_ok
,
6957 "Step expression in DO loop"))
6960 if (iter
->step
->expr_type
== EXPR_CONSTANT
)
6962 if ((iter
->step
->ts
.type
== BT_INTEGER
6963 && mpz_cmp_ui (iter
->step
->value
.integer
, 0) == 0)
6964 || (iter
->step
->ts
.type
== BT_REAL
6965 && mpfr_sgn (iter
->step
->value
.real
) == 0))
6967 gfc_error ("Step expression in DO loop at %L cannot be zero",
6968 &iter
->step
->where
);
6973 /* Convert start, end, and step to the same type as var. */
6974 if (iter
->start
->ts
.kind
!= iter
->var
->ts
.kind
6975 || iter
->start
->ts
.type
!= iter
->var
->ts
.type
)
6976 gfc_convert_type (iter
->start
, &iter
->var
->ts
, 1);
6978 if (iter
->end
->ts
.kind
!= iter
->var
->ts
.kind
6979 || iter
->end
->ts
.type
!= iter
->var
->ts
.type
)
6980 gfc_convert_type (iter
->end
, &iter
->var
->ts
, 1);
6982 if (iter
->step
->ts
.kind
!= iter
->var
->ts
.kind
6983 || iter
->step
->ts
.type
!= iter
->var
->ts
.type
)
6984 gfc_convert_type (iter
->step
, &iter
->var
->ts
, 1);
6986 if (iter
->start
->expr_type
== EXPR_CONSTANT
6987 && iter
->end
->expr_type
== EXPR_CONSTANT
6988 && iter
->step
->expr_type
== EXPR_CONSTANT
)
6991 if (iter
->start
->ts
.type
== BT_INTEGER
)
6993 sgn
= mpz_cmp_ui (iter
->step
->value
.integer
, 0);
6994 cmp
= mpz_cmp (iter
->end
->value
.integer
, iter
->start
->value
.integer
);
6998 sgn
= mpfr_sgn (iter
->step
->value
.real
);
6999 cmp
= mpfr_cmp (iter
->end
->value
.real
, iter
->start
->value
.real
);
7001 if (warn_zerotrip
&& ((sgn
> 0 && cmp
< 0) || (sgn
< 0 && cmp
> 0)))
7002 gfc_warning (OPT_Wzerotrip
,
7003 "DO loop at %L will be executed zero times",
7004 &iter
->step
->where
);
7007 if (iter
->end
->expr_type
== EXPR_CONSTANT
7008 && iter
->end
->ts
.type
== BT_INTEGER
7009 && iter
->step
->expr_type
== EXPR_CONSTANT
7010 && iter
->step
->ts
.type
== BT_INTEGER
7011 && (mpz_cmp_si (iter
->step
->value
.integer
, -1L) == 0
7012 || mpz_cmp_si (iter
->step
->value
.integer
, 1L) == 0))
7014 bool is_step_positive
= mpz_cmp_ui (iter
->step
->value
.integer
, 1) == 0;
7015 int k
= gfc_validate_kind (BT_INTEGER
, iter
->end
->ts
.kind
, false);
7017 if (is_step_positive
7018 && mpz_cmp (iter
->end
->value
.integer
, gfc_integer_kinds
[k
].huge
) == 0)
7019 gfc_warning (OPT_Wundefined_do_loop
,
7020 "DO loop at %L is undefined as it overflows",
7021 &iter
->step
->where
);
7022 else if (!is_step_positive
7023 && mpz_cmp (iter
->end
->value
.integer
,
7024 gfc_integer_kinds
[k
].min_int
) == 0)
7025 gfc_warning (OPT_Wundefined_do_loop
,
7026 "DO loop at %L is undefined as it underflows",
7027 &iter
->step
->where
);
7034 /* Traversal function for find_forall_index. f == 2 signals that
7035 that variable itself is not to be checked - only the references. */
7038 forall_index (gfc_expr
*expr
, gfc_symbol
*sym
, int *f
)
7040 if (expr
->expr_type
!= EXPR_VARIABLE
)
7043 /* A scalar assignment */
7044 if (!expr
->ref
|| *f
== 1)
7046 if (expr
->symtree
->n
.sym
== sym
)
7058 /* Check whether the FORALL index appears in the expression or not.
7059 Returns true if SYM is found in EXPR. */
7062 find_forall_index (gfc_expr
*expr
, gfc_symbol
*sym
, int f
)
7064 if (gfc_traverse_expr (expr
, sym
, forall_index
, f
))
7071 /* Resolve a list of FORALL iterators. The FORALL index-name is constrained
7072 to be a scalar INTEGER variable. The subscripts and stride are scalar
7073 INTEGERs, and if stride is a constant it must be nonzero.
7074 Furthermore "A subscript or stride in a forall-triplet-spec shall
7075 not contain a reference to any index-name in the
7076 forall-triplet-spec-list in which it appears." (7.5.4.1) */
7079 resolve_forall_iterators (gfc_forall_iterator
*it
)
7081 gfc_forall_iterator
*iter
, *iter2
;
7083 for (iter
= it
; iter
; iter
= iter
->next
)
7085 if (gfc_resolve_expr (iter
->var
)
7086 && (iter
->var
->ts
.type
!= BT_INTEGER
|| iter
->var
->rank
!= 0))
7087 gfc_error ("FORALL index-name at %L must be a scalar INTEGER",
7090 if (gfc_resolve_expr (iter
->start
)
7091 && (iter
->start
->ts
.type
!= BT_INTEGER
|| iter
->start
->rank
!= 0))
7092 gfc_error ("FORALL start expression at %L must be a scalar INTEGER",
7093 &iter
->start
->where
);
7094 if (iter
->var
->ts
.kind
!= iter
->start
->ts
.kind
)
7095 gfc_convert_type (iter
->start
, &iter
->var
->ts
, 1);
7097 if (gfc_resolve_expr (iter
->end
)
7098 && (iter
->end
->ts
.type
!= BT_INTEGER
|| iter
->end
->rank
!= 0))
7099 gfc_error ("FORALL end expression at %L must be a scalar INTEGER",
7101 if (iter
->var
->ts
.kind
!= iter
->end
->ts
.kind
)
7102 gfc_convert_type (iter
->end
, &iter
->var
->ts
, 1);
7104 if (gfc_resolve_expr (iter
->stride
))
7106 if (iter
->stride
->ts
.type
!= BT_INTEGER
|| iter
->stride
->rank
!= 0)
7107 gfc_error ("FORALL stride expression at %L must be a scalar %s",
7108 &iter
->stride
->where
, "INTEGER");
7110 if (iter
->stride
->expr_type
== EXPR_CONSTANT
7111 && mpz_cmp_ui (iter
->stride
->value
.integer
, 0) == 0)
7112 gfc_error ("FORALL stride expression at %L cannot be zero",
7113 &iter
->stride
->where
);
7115 if (iter
->var
->ts
.kind
!= iter
->stride
->ts
.kind
)
7116 gfc_convert_type (iter
->stride
, &iter
->var
->ts
, 1);
7119 for (iter
= it
; iter
; iter
= iter
->next
)
7120 for (iter2
= iter
; iter2
; iter2
= iter2
->next
)
7122 if (find_forall_index (iter2
->start
, iter
->var
->symtree
->n
.sym
, 0)
7123 || find_forall_index (iter2
->end
, iter
->var
->symtree
->n
.sym
, 0)
7124 || find_forall_index (iter2
->stride
, iter
->var
->symtree
->n
.sym
, 0))
7125 gfc_error ("FORALL index %qs may not appear in triplet "
7126 "specification at %L", iter
->var
->symtree
->name
,
7127 &iter2
->start
->where
);
7132 /* Given a pointer to a symbol that is a derived type, see if it's
7133 inaccessible, i.e. if it's defined in another module and the components are
7134 PRIVATE. The search is recursive if necessary. Returns zero if no
7135 inaccessible components are found, nonzero otherwise. */
7138 derived_inaccessible (gfc_symbol
*sym
)
7142 if (sym
->attr
.use_assoc
&& sym
->attr
.private_comp
)
7145 for (c
= sym
->components
; c
; c
= c
->next
)
7147 /* Prevent an infinite loop through this function. */
7148 if (c
->ts
.type
== BT_DERIVED
&& c
->attr
.pointer
7149 && sym
== c
->ts
.u
.derived
)
7152 if (c
->ts
.type
== BT_DERIVED
&& derived_inaccessible (c
->ts
.u
.derived
))
7160 /* Resolve the argument of a deallocate expression. The expression must be
7161 a pointer or a full array. */
7164 resolve_deallocate_expr (gfc_expr
*e
)
7166 symbol_attribute attr
;
7167 int allocatable
, pointer
;
7173 if (!gfc_resolve_expr (e
))
7176 if (e
->expr_type
!= EXPR_VARIABLE
)
7179 sym
= e
->symtree
->n
.sym
;
7180 unlimited
= UNLIMITED_POLY(sym
);
7182 if (sym
->ts
.type
== BT_CLASS
)
7184 allocatable
= CLASS_DATA (sym
)->attr
.allocatable
;
7185 pointer
= CLASS_DATA (sym
)->attr
.class_pointer
;
7189 allocatable
= sym
->attr
.allocatable
;
7190 pointer
= sym
->attr
.pointer
;
7192 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
7197 if (ref
->u
.ar
.type
!= AR_FULL
7198 && !(ref
->u
.ar
.type
== AR_ELEMENT
&& ref
->u
.ar
.as
->rank
== 0
7199 && ref
->u
.ar
.codimen
&& gfc_ref_this_image (ref
)))
7204 c
= ref
->u
.c
.component
;
7205 if (c
->ts
.type
== BT_CLASS
)
7207 allocatable
= CLASS_DATA (c
)->attr
.allocatable
;
7208 pointer
= CLASS_DATA (c
)->attr
.class_pointer
;
7212 allocatable
= c
->attr
.allocatable
;
7213 pointer
= c
->attr
.pointer
;
7223 attr
= gfc_expr_attr (e
);
7225 if (allocatable
== 0 && attr
.pointer
== 0 && !unlimited
)
7228 gfc_error ("Allocate-object at %L must be ALLOCATABLE or a POINTER",
7234 if (gfc_is_coindexed (e
))
7236 gfc_error ("Coindexed allocatable object at %L", &e
->where
);
7241 && !gfc_check_vardef_context (e
, true, true, false,
7242 _("DEALLOCATE object")))
7244 if (!gfc_check_vardef_context (e
, false, true, false,
7245 _("DEALLOCATE object")))
7252 /* Returns true if the expression e contains a reference to the symbol sym. */
7254 sym_in_expr (gfc_expr
*e
, gfc_symbol
*sym
, int *f ATTRIBUTE_UNUSED
)
7256 if (e
->expr_type
== EXPR_VARIABLE
&& e
->symtree
->n
.sym
== sym
)
7263 gfc_find_sym_in_expr (gfc_symbol
*sym
, gfc_expr
*e
)
7265 return gfc_traverse_expr (e
, sym
, sym_in_expr
, 0);
7269 /* Given the expression node e for an allocatable/pointer of derived type to be
7270 allocated, get the expression node to be initialized afterwards (needed for
7271 derived types with default initializers, and derived types with allocatable
7272 components that need nullification.) */
7275 gfc_expr_to_initialize (gfc_expr
*e
)
7281 result
= gfc_copy_expr (e
);
7283 /* Change the last array reference from AR_ELEMENT to AR_FULL. */
7284 for (ref
= result
->ref
; ref
; ref
= ref
->next
)
7285 if (ref
->type
== REF_ARRAY
&& ref
->next
== NULL
)
7287 ref
->u
.ar
.type
= AR_FULL
;
7289 for (i
= 0; i
< ref
->u
.ar
.dimen
; i
++)
7290 ref
->u
.ar
.start
[i
] = ref
->u
.ar
.end
[i
] = ref
->u
.ar
.stride
[i
] = NULL
;
7295 gfc_free_shape (&result
->shape
, result
->rank
);
7297 /* Recalculate rank, shape, etc. */
7298 gfc_resolve_expr (result
);
7303 /* If the last ref of an expression is an array ref, return a copy of the
7304 expression with that one removed. Otherwise, a copy of the original
7305 expression. This is used for allocate-expressions and pointer assignment
7306 LHS, where there may be an array specification that needs to be stripped
7307 off when using gfc_check_vardef_context. */
7310 remove_last_array_ref (gfc_expr
* e
)
7315 e2
= gfc_copy_expr (e
);
7316 for (r
= &e2
->ref
; *r
; r
= &(*r
)->next
)
7317 if ((*r
)->type
== REF_ARRAY
&& !(*r
)->next
)
7319 gfc_free_ref_list (*r
);
7328 /* Used in resolve_allocate_expr to check that a allocation-object and
7329 a source-expr are conformable. This does not catch all possible
7330 cases; in particular a runtime checking is needed. */
7333 conformable_arrays (gfc_expr
*e1
, gfc_expr
*e2
)
7336 for (tail
= e2
->ref
; tail
&& tail
->next
; tail
= tail
->next
);
7338 /* First compare rank. */
7339 if ((tail
&& e1
->rank
!= tail
->u
.ar
.as
->rank
)
7340 || (!tail
&& e1
->rank
!= e2
->rank
))
7342 gfc_error ("Source-expr at %L must be scalar or have the "
7343 "same rank as the allocate-object at %L",
7344 &e1
->where
, &e2
->where
);
7355 for (i
= 0; i
< e1
->rank
; i
++)
7357 if (tail
->u
.ar
.start
[i
] == NULL
)
7360 if (tail
->u
.ar
.end
[i
])
7362 mpz_set (s
, tail
->u
.ar
.end
[i
]->value
.integer
);
7363 mpz_sub (s
, s
, tail
->u
.ar
.start
[i
]->value
.integer
);
7364 mpz_add_ui (s
, s
, 1);
7368 mpz_set (s
, tail
->u
.ar
.start
[i
]->value
.integer
);
7371 if (mpz_cmp (e1
->shape
[i
], s
) != 0)
7373 gfc_error ("Source-expr at %L and allocate-object at %L must "
7374 "have the same shape", &e1
->where
, &e2
->where
);
7387 /* Resolve the expression in an ALLOCATE statement, doing the additional
7388 checks to see whether the expression is OK or not. The expression must
7389 have a trailing array reference that gives the size of the array. */
7392 resolve_allocate_expr (gfc_expr
*e
, gfc_code
*code
, bool *array_alloc_wo_spec
)
7394 int i
, pointer
, allocatable
, dimension
, is_abstract
;
7398 symbol_attribute attr
;
7399 gfc_ref
*ref
, *ref2
;
7402 gfc_symbol
*sym
= NULL
;
7407 /* Mark the utmost array component as being in allocate to allow DIMEN_STAR
7408 checking of coarrays. */
7409 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
7410 if (ref
->next
== NULL
)
7413 if (ref
&& ref
->type
== REF_ARRAY
)
7414 ref
->u
.ar
.in_allocate
= true;
7416 if (!gfc_resolve_expr (e
))
7419 /* Make sure the expression is allocatable or a pointer. If it is
7420 pointer, the next-to-last reference must be a pointer. */
7424 sym
= e
->symtree
->n
.sym
;
7426 /* Check whether ultimate component is abstract and CLASS. */
7429 /* Is the allocate-object unlimited polymorphic? */
7430 unlimited
= UNLIMITED_POLY(e
);
7432 if (e
->expr_type
!= EXPR_VARIABLE
)
7435 attr
= gfc_expr_attr (e
);
7436 pointer
= attr
.pointer
;
7437 dimension
= attr
.dimension
;
7438 codimension
= attr
.codimension
;
7442 if (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
))
7444 allocatable
= CLASS_DATA (sym
)->attr
.allocatable
;
7445 pointer
= CLASS_DATA (sym
)->attr
.class_pointer
;
7446 dimension
= CLASS_DATA (sym
)->attr
.dimension
;
7447 codimension
= CLASS_DATA (sym
)->attr
.codimension
;
7448 is_abstract
= CLASS_DATA (sym
)->attr
.abstract
;
7452 allocatable
= sym
->attr
.allocatable
;
7453 pointer
= sym
->attr
.pointer
;
7454 dimension
= sym
->attr
.dimension
;
7455 codimension
= sym
->attr
.codimension
;
7460 for (ref
= e
->ref
; ref
; ref2
= ref
, ref
= ref
->next
)
7465 if (ref
->u
.ar
.codimen
> 0)
7468 for (n
= ref
->u
.ar
.dimen
;
7469 n
< ref
->u
.ar
.dimen
+ ref
->u
.ar
.codimen
; n
++)
7470 if (ref
->u
.ar
.dimen_type
[n
] != DIMEN_THIS_IMAGE
)
7477 if (ref
->next
!= NULL
)
7485 gfc_error ("Coindexed allocatable object at %L",
7490 c
= ref
->u
.c
.component
;
7491 if (c
->ts
.type
== BT_CLASS
)
7493 allocatable
= CLASS_DATA (c
)->attr
.allocatable
;
7494 pointer
= CLASS_DATA (c
)->attr
.class_pointer
;
7495 dimension
= CLASS_DATA (c
)->attr
.dimension
;
7496 codimension
= CLASS_DATA (c
)->attr
.codimension
;
7497 is_abstract
= CLASS_DATA (c
)->attr
.abstract
;
7501 allocatable
= c
->attr
.allocatable
;
7502 pointer
= c
->attr
.pointer
;
7503 dimension
= c
->attr
.dimension
;
7504 codimension
= c
->attr
.codimension
;
7505 is_abstract
= c
->attr
.abstract
;
7517 /* Check for F08:C628. */
7518 if (allocatable
== 0 && pointer
== 0 && !unlimited
)
7520 gfc_error ("Allocate-object at %L must be ALLOCATABLE or a POINTER",
7525 /* Some checks for the SOURCE tag. */
7528 /* Check F03:C631. */
7529 if (!gfc_type_compatible (&e
->ts
, &code
->expr3
->ts
))
7531 gfc_error ("Type of entity at %L is type incompatible with "
7532 "source-expr at %L", &e
->where
, &code
->expr3
->where
);
7536 /* Check F03:C632 and restriction following Note 6.18. */
7537 if (code
->expr3
->rank
> 0 && !conformable_arrays (code
->expr3
, e
))
7540 /* Check F03:C633. */
7541 if (code
->expr3
->ts
.kind
!= e
->ts
.kind
&& !unlimited
)
7543 gfc_error ("The allocate-object at %L and the source-expr at %L "
7544 "shall have the same kind type parameter",
7545 &e
->where
, &code
->expr3
->where
);
7549 /* Check F2008, C642. */
7550 if (code
->expr3
->ts
.type
== BT_DERIVED
7551 && ((codimension
&& gfc_expr_attr (code
->expr3
).lock_comp
)
7552 || (code
->expr3
->ts
.u
.derived
->from_intmod
7553 == INTMOD_ISO_FORTRAN_ENV
7554 && code
->expr3
->ts
.u
.derived
->intmod_sym_id
7555 == ISOFORTRAN_LOCK_TYPE
)))
7557 gfc_error ("The source-expr at %L shall neither be of type "
7558 "LOCK_TYPE nor have a LOCK_TYPE component if "
7559 "allocate-object at %L is a coarray",
7560 &code
->expr3
->where
, &e
->where
);
7564 /* Check TS18508, C702/C703. */
7565 if (code
->expr3
->ts
.type
== BT_DERIVED
7566 && ((codimension
&& gfc_expr_attr (code
->expr3
).event_comp
)
7567 || (code
->expr3
->ts
.u
.derived
->from_intmod
7568 == INTMOD_ISO_FORTRAN_ENV
7569 && code
->expr3
->ts
.u
.derived
->intmod_sym_id
7570 == ISOFORTRAN_EVENT_TYPE
)))
7572 gfc_error ("The source-expr at %L shall neither be of type "
7573 "EVENT_TYPE nor have a EVENT_TYPE component if "
7574 "allocate-object at %L is a coarray",
7575 &code
->expr3
->where
, &e
->where
);
7580 /* Check F08:C629. */
7581 if (is_abstract
&& code
->ext
.alloc
.ts
.type
== BT_UNKNOWN
7584 gcc_assert (e
->ts
.type
== BT_CLASS
);
7585 gfc_error ("Allocating %s of ABSTRACT base type at %L requires a "
7586 "type-spec or source-expr", sym
->name
, &e
->where
);
7590 /* Check F08:C632. */
7591 if (code
->ext
.alloc
.ts
.type
== BT_CHARACTER
&& !e
->ts
.deferred
7592 && !UNLIMITED_POLY (e
))
7596 if (!e
->ts
.u
.cl
->length
)
7599 cmp
= gfc_dep_compare_expr (e
->ts
.u
.cl
->length
,
7600 code
->ext
.alloc
.ts
.u
.cl
->length
);
7601 if (cmp
== 1 || cmp
== -1 || cmp
== -3)
7603 gfc_error ("Allocating %s at %L with type-spec requires the same "
7604 "character-length parameter as in the declaration",
7605 sym
->name
, &e
->where
);
7610 /* In the variable definition context checks, gfc_expr_attr is used
7611 on the expression. This is fooled by the array specification
7612 present in e, thus we have to eliminate that one temporarily. */
7613 e2
= remove_last_array_ref (e
);
7616 t
= gfc_check_vardef_context (e2
, true, true, false,
7617 _("ALLOCATE object"));
7619 t
= gfc_check_vardef_context (e2
, false, true, false,
7620 _("ALLOCATE object"));
7625 if (e
->ts
.type
== BT_CLASS
&& CLASS_DATA (e
)->attr
.dimension
7626 && !code
->expr3
&& code
->ext
.alloc
.ts
.type
== BT_DERIVED
)
7628 /* For class arrays, the initialization with SOURCE is done
7629 using _copy and trans_call. It is convenient to exploit that
7630 when the allocated type is different from the declared type but
7631 no SOURCE exists by setting expr3. */
7632 code
->expr3
= gfc_default_initializer (&code
->ext
.alloc
.ts
);
7634 else if (flag_coarray
!= GFC_FCOARRAY_LIB
&& e
->ts
.type
== BT_DERIVED
7635 && e
->ts
.u
.derived
->from_intmod
== INTMOD_ISO_FORTRAN_ENV
7636 && e
->ts
.u
.derived
->intmod_sym_id
== ISOFORTRAN_EVENT_TYPE
)
7638 /* We have to zero initialize the integer variable. */
7639 code
->expr3
= gfc_get_int_expr (gfc_default_integer_kind
, &e
->where
, 0);
7642 if (e
->ts
.type
== BT_CLASS
&& !unlimited
&& !UNLIMITED_POLY (code
->expr3
))
7644 /* Make sure the vtab symbol is present when
7645 the module variables are generated. */
7646 gfc_typespec ts
= e
->ts
;
7648 ts
= code
->expr3
->ts
;
7649 else if (code
->ext
.alloc
.ts
.type
== BT_DERIVED
)
7650 ts
= code
->ext
.alloc
.ts
;
7652 /* Finding the vtab also publishes the type's symbol. Therefore this
7653 statement is necessary. */
7654 gfc_find_derived_vtab (ts
.u
.derived
);
7656 else if (unlimited
&& !UNLIMITED_POLY (code
->expr3
))
7658 /* Again, make sure the vtab symbol is present when
7659 the module variables are generated. */
7660 gfc_typespec
*ts
= NULL
;
7662 ts
= &code
->expr3
->ts
;
7664 ts
= &code
->ext
.alloc
.ts
;
7668 /* Finding the vtab also publishes the type's symbol. Therefore this
7669 statement is necessary. */
7673 if (dimension
== 0 && codimension
== 0)
7676 /* Make sure the last reference node is an array specification. */
7678 if (!ref2
|| ref2
->type
!= REF_ARRAY
|| ref2
->u
.ar
.type
== AR_FULL
7679 || (dimension
&& ref2
->u
.ar
.dimen
== 0))
7684 if (!gfc_notify_std (GFC_STD_F2008
, "Array specification required "
7685 "in ALLOCATE statement at %L", &e
->where
))
7687 if (code
->expr3
->rank
!= 0)
7688 *array_alloc_wo_spec
= true;
7691 gfc_error ("Array specification or array-valued SOURCE= "
7692 "expression required in ALLOCATE statement at %L",
7699 gfc_error ("Array specification required in ALLOCATE statement "
7700 "at %L", &e
->where
);
7705 /* Make sure that the array section reference makes sense in the
7706 context of an ALLOCATE specification. */
7711 for (i
= ar
->dimen
; i
< ar
->dimen
+ ar
->codimen
; i
++)
7712 if (ar
->dimen_type
[i
] == DIMEN_THIS_IMAGE
)
7714 gfc_error ("Coarray specification required in ALLOCATE statement "
7715 "at %L", &e
->where
);
7719 for (i
= 0; i
< ar
->dimen
; i
++)
7721 if (ar
->type
== AR_ELEMENT
|| ar
->type
== AR_FULL
)
7724 switch (ar
->dimen_type
[i
])
7730 if (ar
->start
[i
] != NULL
7731 && ar
->end
[i
] != NULL
7732 && ar
->stride
[i
] == NULL
)
7740 case DIMEN_THIS_IMAGE
:
7741 gfc_error ("Bad array specification in ALLOCATE statement at %L",
7747 for (a
= code
->ext
.alloc
.list
; a
; a
= a
->next
)
7749 sym
= a
->expr
->symtree
->n
.sym
;
7751 /* TODO - check derived type components. */
7752 if (gfc_bt_struct (sym
->ts
.type
) || sym
->ts
.type
== BT_CLASS
)
7755 if ((ar
->start
[i
] != NULL
7756 && gfc_find_sym_in_expr (sym
, ar
->start
[i
]))
7757 || (ar
->end
[i
] != NULL
7758 && gfc_find_sym_in_expr (sym
, ar
->end
[i
])))
7760 gfc_error ("%qs must not appear in the array specification at "
7761 "%L in the same ALLOCATE statement where it is "
7762 "itself allocated", sym
->name
, &ar
->where
);
7768 for (i
= ar
->dimen
; i
< ar
->codimen
+ ar
->dimen
; i
++)
7770 if (ar
->dimen_type
[i
] == DIMEN_ELEMENT
7771 || ar
->dimen_type
[i
] == DIMEN_RANGE
)
7773 if (i
== (ar
->dimen
+ ar
->codimen
- 1))
7775 gfc_error ("Expected '*' in coindex specification in ALLOCATE "
7776 "statement at %L", &e
->where
);
7782 if (ar
->dimen_type
[i
] == DIMEN_STAR
&& i
== (ar
->dimen
+ ar
->codimen
- 1)
7783 && ar
->stride
[i
] == NULL
)
7786 gfc_error ("Bad coarray specification in ALLOCATE statement at %L",
7800 resolve_allocate_deallocate (gfc_code
*code
, const char *fcn
)
7802 gfc_expr
*stat
, *errmsg
, *pe
, *qe
;
7803 gfc_alloc
*a
, *p
, *q
;
7806 errmsg
= code
->expr2
;
7808 /* Check the stat variable. */
7811 gfc_check_vardef_context (stat
, false, false, false,
7812 _("STAT variable"));
7814 if ((stat
->ts
.type
!= BT_INTEGER
7815 && !(stat
->ref
&& (stat
->ref
->type
== REF_ARRAY
7816 || stat
->ref
->type
== REF_COMPONENT
)))
7818 gfc_error ("Stat-variable at %L must be a scalar INTEGER "
7819 "variable", &stat
->where
);
7821 for (p
= code
->ext
.alloc
.list
; p
; p
= p
->next
)
7822 if (p
->expr
->symtree
->n
.sym
->name
== stat
->symtree
->n
.sym
->name
)
7824 gfc_ref
*ref1
, *ref2
;
7827 for (ref1
= p
->expr
->ref
, ref2
= stat
->ref
; ref1
&& ref2
;
7828 ref1
= ref1
->next
, ref2
= ref2
->next
)
7830 if (ref1
->type
!= REF_COMPONENT
|| ref2
->type
!= REF_COMPONENT
)
7832 if (ref1
->u
.c
.component
->name
!= ref2
->u
.c
.component
->name
)
7841 gfc_error ("Stat-variable at %L shall not be %sd within "
7842 "the same %s statement", &stat
->where
, fcn
, fcn
);
7848 /* Check the errmsg variable. */
7852 gfc_warning (0, "ERRMSG at %L is useless without a STAT tag",
7855 gfc_check_vardef_context (errmsg
, false, false, false,
7856 _("ERRMSG variable"));
7858 /* F18:R928 alloc-opt is ERRMSG = errmsg-variable
7859 F18:R930 errmsg-variable is scalar-default-char-variable
7860 F18:R906 default-char-variable is variable
7861 F18:C906 default-char-variable shall be default character. */
7862 if ((errmsg
->ts
.type
!= BT_CHARACTER
7864 && (errmsg
->ref
->type
== REF_ARRAY
7865 || errmsg
->ref
->type
== REF_COMPONENT
)))
7867 || errmsg
->ts
.kind
!= gfc_default_character_kind
)
7868 gfc_error ("ERRMSG variable at %L shall be a scalar default CHARACTER "
7869 "variable", &errmsg
->where
);
7871 for (p
= code
->ext
.alloc
.list
; p
; p
= p
->next
)
7872 if (p
->expr
->symtree
->n
.sym
->name
== errmsg
->symtree
->n
.sym
->name
)
7874 gfc_ref
*ref1
, *ref2
;
7877 for (ref1
= p
->expr
->ref
, ref2
= errmsg
->ref
; ref1
&& ref2
;
7878 ref1
= ref1
->next
, ref2
= ref2
->next
)
7880 if (ref1
->type
!= REF_COMPONENT
|| ref2
->type
!= REF_COMPONENT
)
7882 if (ref1
->u
.c
.component
->name
!= ref2
->u
.c
.component
->name
)
7891 gfc_error ("Errmsg-variable at %L shall not be %sd within "
7892 "the same %s statement", &errmsg
->where
, fcn
, fcn
);
7898 /* Check that an allocate-object appears only once in the statement. */
7900 for (p
= code
->ext
.alloc
.list
; p
; p
= p
->next
)
7903 for (q
= p
->next
; q
; q
= q
->next
)
7906 if (pe
->symtree
->n
.sym
->name
== qe
->symtree
->n
.sym
->name
)
7908 /* This is a potential collision. */
7909 gfc_ref
*pr
= pe
->ref
;
7910 gfc_ref
*qr
= qe
->ref
;
7912 /* Follow the references until
7913 a) They start to differ, in which case there is no error;
7914 you can deallocate a%b and a%c in a single statement
7915 b) Both of them stop, which is an error
7916 c) One of them stops, which is also an error. */
7919 if (pr
== NULL
&& qr
== NULL
)
7921 gfc_error ("Allocate-object at %L also appears at %L",
7922 &pe
->where
, &qe
->where
);
7925 else if (pr
!= NULL
&& qr
== NULL
)
7927 gfc_error ("Allocate-object at %L is subobject of"
7928 " object at %L", &pe
->where
, &qe
->where
);
7931 else if (pr
== NULL
&& qr
!= NULL
)
7933 gfc_error ("Allocate-object at %L is subobject of"
7934 " object at %L", &qe
->where
, &pe
->where
);
7937 /* Here, pr != NULL && qr != NULL */
7938 gcc_assert(pr
->type
== qr
->type
);
7939 if (pr
->type
== REF_ARRAY
)
7941 /* Handle cases like allocate(v(3)%x(3), v(2)%x(3)),
7943 gcc_assert (qr
->type
== REF_ARRAY
);
7945 if (pr
->next
&& qr
->next
)
7948 gfc_array_ref
*par
= &(pr
->u
.ar
);
7949 gfc_array_ref
*qar
= &(qr
->u
.ar
);
7951 for (i
=0; i
<par
->dimen
; i
++)
7953 if ((par
->start
[i
] != NULL
7954 || qar
->start
[i
] != NULL
)
7955 && gfc_dep_compare_expr (par
->start
[i
],
7956 qar
->start
[i
]) != 0)
7963 if (pr
->u
.c
.component
->name
!= qr
->u
.c
.component
->name
)
7976 if (strcmp (fcn
, "ALLOCATE") == 0)
7978 bool arr_alloc_wo_spec
= false;
7980 /* Resolving the expr3 in the loop over all objects to allocate would
7981 execute loop invariant code for each loop item. Therefore do it just
7983 if (code
->expr3
&& code
->expr3
->mold
7984 && code
->expr3
->ts
.type
== BT_DERIVED
)
7986 /* Default initialization via MOLD (non-polymorphic). */
7987 gfc_expr
*rhs
= gfc_default_initializer (&code
->expr3
->ts
);
7990 gfc_resolve_expr (rhs
);
7991 gfc_free_expr (code
->expr3
);
7995 for (a
= code
->ext
.alloc
.list
; a
; a
= a
->next
)
7996 resolve_allocate_expr (a
->expr
, code
, &arr_alloc_wo_spec
);
7998 if (arr_alloc_wo_spec
&& code
->expr3
)
8000 /* Mark the allocate to have to take the array specification
8002 code
->ext
.alloc
.arr_spec_from_expr3
= 1;
8007 for (a
= code
->ext
.alloc
.list
; a
; a
= a
->next
)
8008 resolve_deallocate_expr (a
->expr
);
8013 /************ SELECT CASE resolution subroutines ************/
8015 /* Callback function for our mergesort variant. Determines interval
8016 overlaps for CASEs. Return <0 if op1 < op2, 0 for overlap, >0 for
8017 op1 > op2. Assumes we're not dealing with the default case.
8018 We have op1 = (:L), (K:L) or (K:) and op2 = (:N), (M:N) or (M:).
8019 There are nine situations to check. */
8022 compare_cases (const gfc_case
*op1
, const gfc_case
*op2
)
8026 if (op1
->low
== NULL
) /* op1 = (:L) */
8028 /* op2 = (:N), so overlap. */
8030 /* op2 = (M:) or (M:N), L < M */
8031 if (op2
->low
!= NULL
8032 && gfc_compare_expr (op1
->high
, op2
->low
, INTRINSIC_LT
) < 0)
8035 else if (op1
->high
== NULL
) /* op1 = (K:) */
8037 /* op2 = (M:), so overlap. */
8039 /* op2 = (:N) or (M:N), K > N */
8040 if (op2
->high
!= NULL
8041 && gfc_compare_expr (op1
->low
, op2
->high
, INTRINSIC_GT
) > 0)
8044 else /* op1 = (K:L) */
8046 if (op2
->low
== NULL
) /* op2 = (:N), K > N */
8047 retval
= (gfc_compare_expr (op1
->low
, op2
->high
, INTRINSIC_GT
) > 0)
8049 else if (op2
->high
== NULL
) /* op2 = (M:), L < M */
8050 retval
= (gfc_compare_expr (op1
->high
, op2
->low
, INTRINSIC_LT
) < 0)
8052 else /* op2 = (M:N) */
8056 if (gfc_compare_expr (op1
->high
, op2
->low
, INTRINSIC_LT
) < 0)
8059 else if (gfc_compare_expr (op1
->low
, op2
->high
, INTRINSIC_GT
) > 0)
8068 /* Merge-sort a double linked case list, detecting overlap in the
8069 process. LIST is the head of the double linked case list before it
8070 is sorted. Returns the head of the sorted list if we don't see any
8071 overlap, or NULL otherwise. */
8074 check_case_overlap (gfc_case
*list
)
8076 gfc_case
*p
, *q
, *e
, *tail
;
8077 int insize
, nmerges
, psize
, qsize
, cmp
, overlap_seen
;
8079 /* If the passed list was empty, return immediately. */
8086 /* Loop unconditionally. The only exit from this loop is a return
8087 statement, when we've finished sorting the case list. */
8094 /* Count the number of merges we do in this pass. */
8097 /* Loop while there exists a merge to be done. */
8102 /* Count this merge. */
8105 /* Cut the list in two pieces by stepping INSIZE places
8106 forward in the list, starting from P. */
8109 for (i
= 0; i
< insize
; i
++)
8118 /* Now we have two lists. Merge them! */
8119 while (psize
> 0 || (qsize
> 0 && q
!= NULL
))
8121 /* See from which the next case to merge comes from. */
8124 /* P is empty so the next case must come from Q. */
8129 else if (qsize
== 0 || q
== NULL
)
8138 cmp
= compare_cases (p
, q
);
8141 /* The whole case range for P is less than the
8149 /* The whole case range for Q is greater than
8150 the case range for P. */
8157 /* The cases overlap, or they are the same
8158 element in the list. Either way, we must
8159 issue an error and get the next case from P. */
8160 /* FIXME: Sort P and Q by line number. */
8161 gfc_error ("CASE label at %L overlaps with CASE "
8162 "label at %L", &p
->where
, &q
->where
);
8170 /* Add the next element to the merged list. */
8179 /* P has now stepped INSIZE places along, and so has Q. So
8180 they're the same. */
8185 /* If we have done only one merge or none at all, we've
8186 finished sorting the cases. */
8195 /* Otherwise repeat, merging lists twice the size. */
8201 /* Check to see if an expression is suitable for use in a CASE statement.
8202 Makes sure that all case expressions are scalar constants of the same
8203 type. Return false if anything is wrong. */
8206 validate_case_label_expr (gfc_expr
*e
, gfc_expr
*case_expr
)
8208 if (e
== NULL
) return true;
8210 if (e
->ts
.type
!= case_expr
->ts
.type
)
8212 gfc_error ("Expression in CASE statement at %L must be of type %s",
8213 &e
->where
, gfc_basic_typename (case_expr
->ts
.type
));
8217 /* C805 (R808) For a given case-construct, each case-value shall be of
8218 the same type as case-expr. For character type, length differences
8219 are allowed, but the kind type parameters shall be the same. */
8221 if (case_expr
->ts
.type
== BT_CHARACTER
&& e
->ts
.kind
!= case_expr
->ts
.kind
)
8223 gfc_error ("Expression in CASE statement at %L must be of kind %d",
8224 &e
->where
, case_expr
->ts
.kind
);
8228 /* Convert the case value kind to that of case expression kind,
8231 if (e
->ts
.kind
!= case_expr
->ts
.kind
)
8232 gfc_convert_type_warn (e
, &case_expr
->ts
, 2, 0);
8236 gfc_error ("Expression in CASE statement at %L must be scalar",
8245 /* Given a completely parsed select statement, we:
8247 - Validate all expressions and code within the SELECT.
8248 - Make sure that the selection expression is not of the wrong type.
8249 - Make sure that no case ranges overlap.
8250 - Eliminate unreachable cases and unreachable code resulting from
8251 removing case labels.
8253 The standard does allow unreachable cases, e.g. CASE (5:3). But
8254 they are a hassle for code generation, and to prevent that, we just
8255 cut them out here. This is not necessary for overlapping cases
8256 because they are illegal and we never even try to generate code.
8258 We have the additional caveat that a SELECT construct could have
8259 been a computed GOTO in the source code. Fortunately we can fairly
8260 easily work around that here: The case_expr for a "real" SELECT CASE
8261 is in code->expr1, but for a computed GOTO it is in code->expr2. All
8262 we have to do is make sure that the case_expr is a scalar integer
8266 resolve_select (gfc_code
*code
, bool select_type
)
8269 gfc_expr
*case_expr
;
8270 gfc_case
*cp
, *default_case
, *tail
, *head
;
8271 int seen_unreachable
;
8277 if (code
->expr1
== NULL
)
8279 /* This was actually a computed GOTO statement. */
8280 case_expr
= code
->expr2
;
8281 if (case_expr
->ts
.type
!= BT_INTEGER
|| case_expr
->rank
!= 0)
8282 gfc_error ("Selection expression in computed GOTO statement "
8283 "at %L must be a scalar integer expression",
8286 /* Further checking is not necessary because this SELECT was built
8287 by the compiler, so it should always be OK. Just move the
8288 case_expr from expr2 to expr so that we can handle computed
8289 GOTOs as normal SELECTs from here on. */
8290 code
->expr1
= code
->expr2
;
8295 case_expr
= code
->expr1
;
8296 type
= case_expr
->ts
.type
;
8299 if (type
!= BT_LOGICAL
&& type
!= BT_INTEGER
&& type
!= BT_CHARACTER
)
8301 gfc_error ("Argument of SELECT statement at %L cannot be %s",
8302 &case_expr
->where
, gfc_typename (&case_expr
->ts
));
8304 /* Punt. Going on here just produce more garbage error messages. */
8309 if (!select_type
&& case_expr
->rank
!= 0)
8311 gfc_error ("Argument of SELECT statement at %L must be a scalar "
8312 "expression", &case_expr
->where
);
8318 /* Raise a warning if an INTEGER case value exceeds the range of
8319 the case-expr. Later, all expressions will be promoted to the
8320 largest kind of all case-labels. */
8322 if (type
== BT_INTEGER
)
8323 for (body
= code
->block
; body
; body
= body
->block
)
8324 for (cp
= body
->ext
.block
.case_list
; cp
; cp
= cp
->next
)
8327 && gfc_check_integer_range (cp
->low
->value
.integer
,
8328 case_expr
->ts
.kind
) != ARITH_OK
)
8329 gfc_warning (0, "Expression in CASE statement at %L is "
8330 "not in the range of %s", &cp
->low
->where
,
8331 gfc_typename (&case_expr
->ts
));
8334 && cp
->low
!= cp
->high
8335 && gfc_check_integer_range (cp
->high
->value
.integer
,
8336 case_expr
->ts
.kind
) != ARITH_OK
)
8337 gfc_warning (0, "Expression in CASE statement at %L is "
8338 "not in the range of %s", &cp
->high
->where
,
8339 gfc_typename (&case_expr
->ts
));
8342 /* PR 19168 has a long discussion concerning a mismatch of the kinds
8343 of the SELECT CASE expression and its CASE values. Walk the lists
8344 of case values, and if we find a mismatch, promote case_expr to
8345 the appropriate kind. */
8347 if (type
== BT_LOGICAL
|| type
== BT_INTEGER
)
8349 for (body
= code
->block
; body
; body
= body
->block
)
8351 /* Walk the case label list. */
8352 for (cp
= body
->ext
.block
.case_list
; cp
; cp
= cp
->next
)
8354 /* Intercept the DEFAULT case. It does not have a kind. */
8355 if (cp
->low
== NULL
&& cp
->high
== NULL
)
8358 /* Unreachable case ranges are discarded, so ignore. */
8359 if (cp
->low
!= NULL
&& cp
->high
!= NULL
8360 && cp
->low
!= cp
->high
8361 && gfc_compare_expr (cp
->low
, cp
->high
, INTRINSIC_GT
) > 0)
8365 && case_expr
->ts
.kind
!= gfc_kind_max(case_expr
, cp
->low
))
8366 gfc_convert_type_warn (case_expr
, &cp
->low
->ts
, 2, 0);
8368 if (cp
->high
!= NULL
8369 && case_expr
->ts
.kind
!= gfc_kind_max(case_expr
, cp
->high
))
8370 gfc_convert_type_warn (case_expr
, &cp
->high
->ts
, 2, 0);
8375 /* Assume there is no DEFAULT case. */
8376 default_case
= NULL
;
8381 for (body
= code
->block
; body
; body
= body
->block
)
8383 /* Assume the CASE list is OK, and all CASE labels can be matched. */
8385 seen_unreachable
= 0;
8387 /* Walk the case label list, making sure that all case labels
8389 for (cp
= body
->ext
.block
.case_list
; cp
; cp
= cp
->next
)
8391 /* Count the number of cases in the whole construct. */
8394 /* Intercept the DEFAULT case. */
8395 if (cp
->low
== NULL
&& cp
->high
== NULL
)
8397 if (default_case
!= NULL
)
8399 gfc_error ("The DEFAULT CASE at %L cannot be followed "
8400 "by a second DEFAULT CASE at %L",
8401 &default_case
->where
, &cp
->where
);
8412 /* Deal with single value cases and case ranges. Errors are
8413 issued from the validation function. */
8414 if (!validate_case_label_expr (cp
->low
, case_expr
)
8415 || !validate_case_label_expr (cp
->high
, case_expr
))
8421 if (type
== BT_LOGICAL
8422 && ((cp
->low
== NULL
|| cp
->high
== NULL
)
8423 || cp
->low
!= cp
->high
))
8425 gfc_error ("Logical range in CASE statement at %L is not "
8426 "allowed", &cp
->low
->where
);
8431 if (type
== BT_LOGICAL
&& cp
->low
->expr_type
== EXPR_CONSTANT
)
8434 value
= cp
->low
->value
.logical
== 0 ? 2 : 1;
8435 if (value
& seen_logical
)
8437 gfc_error ("Constant logical value in CASE statement "
8438 "is repeated at %L",
8443 seen_logical
|= value
;
8446 if (cp
->low
!= NULL
&& cp
->high
!= NULL
8447 && cp
->low
!= cp
->high
8448 && gfc_compare_expr (cp
->low
, cp
->high
, INTRINSIC_GT
) > 0)
8450 if (warn_surprising
)
8451 gfc_warning (OPT_Wsurprising
,
8452 "Range specification at %L can never be matched",
8455 cp
->unreachable
= 1;
8456 seen_unreachable
= 1;
8460 /* If the case range can be matched, it can also overlap with
8461 other cases. To make sure it does not, we put it in a
8462 double linked list here. We sort that with a merge sort
8463 later on to detect any overlapping cases. */
8467 head
->right
= head
->left
= NULL
;
8472 tail
->right
->left
= tail
;
8479 /* It there was a failure in the previous case label, give up
8480 for this case label list. Continue with the next block. */
8484 /* See if any case labels that are unreachable have been seen.
8485 If so, we eliminate them. This is a bit of a kludge because
8486 the case lists for a single case statement (label) is a
8487 single forward linked lists. */
8488 if (seen_unreachable
)
8490 /* Advance until the first case in the list is reachable. */
8491 while (body
->ext
.block
.case_list
!= NULL
8492 && body
->ext
.block
.case_list
->unreachable
)
8494 gfc_case
*n
= body
->ext
.block
.case_list
;
8495 body
->ext
.block
.case_list
= body
->ext
.block
.case_list
->next
;
8497 gfc_free_case_list (n
);
8500 /* Strip all other unreachable cases. */
8501 if (body
->ext
.block
.case_list
)
8503 for (cp
= body
->ext
.block
.case_list
; cp
&& cp
->next
; cp
= cp
->next
)
8505 if (cp
->next
->unreachable
)
8507 gfc_case
*n
= cp
->next
;
8508 cp
->next
= cp
->next
->next
;
8510 gfc_free_case_list (n
);
8517 /* See if there were overlapping cases. If the check returns NULL,
8518 there was overlap. In that case we don't do anything. If head
8519 is non-NULL, we prepend the DEFAULT case. The sorted list can
8520 then used during code generation for SELECT CASE constructs with
8521 a case expression of a CHARACTER type. */
8524 head
= check_case_overlap (head
);
8526 /* Prepend the default_case if it is there. */
8527 if (head
!= NULL
&& default_case
)
8529 default_case
->left
= NULL
;
8530 default_case
->right
= head
;
8531 head
->left
= default_case
;
8535 /* Eliminate dead blocks that may be the result if we've seen
8536 unreachable case labels for a block. */
8537 for (body
= code
; body
&& body
->block
; body
= body
->block
)
8539 if (body
->block
->ext
.block
.case_list
== NULL
)
8541 /* Cut the unreachable block from the code chain. */
8542 gfc_code
*c
= body
->block
;
8543 body
->block
= c
->block
;
8545 /* Kill the dead block, but not the blocks below it. */
8547 gfc_free_statements (c
);
8551 /* More than two cases is legal but insane for logical selects.
8552 Issue a warning for it. */
8553 if (warn_surprising
&& type
== BT_LOGICAL
&& ncases
> 2)
8554 gfc_warning (OPT_Wsurprising
,
8555 "Logical SELECT CASE block at %L has more that two cases",
8560 /* Check if a derived type is extensible. */
8563 gfc_type_is_extensible (gfc_symbol
*sym
)
8565 return !(sym
->attr
.is_bind_c
|| sym
->attr
.sequence
8566 || (sym
->attr
.is_class
8567 && sym
->components
->ts
.u
.derived
->attr
.unlimited_polymorphic
));
8572 resolve_types (gfc_namespace
*ns
);
8574 /* Resolve an associate-name: Resolve target and ensure the type-spec is
8575 correct as well as possibly the array-spec. */
8578 resolve_assoc_var (gfc_symbol
* sym
, bool resolve_target
)
8582 gcc_assert (sym
->assoc
);
8583 gcc_assert (sym
->attr
.flavor
== FL_VARIABLE
);
8585 /* If this is for SELECT TYPE, the target may not yet be set. In that
8586 case, return. Resolution will be called later manually again when
8588 target
= sym
->assoc
->target
;
8591 gcc_assert (!sym
->assoc
->dangling
);
8593 if (resolve_target
&& !gfc_resolve_expr (target
))
8596 /* For variable targets, we get some attributes from the target. */
8597 if (target
->expr_type
== EXPR_VARIABLE
)
8601 gcc_assert (target
->symtree
);
8602 tsym
= target
->symtree
->n
.sym
;
8604 sym
->attr
.asynchronous
= tsym
->attr
.asynchronous
;
8605 sym
->attr
.volatile_
= tsym
->attr
.volatile_
;
8607 sym
->attr
.target
= tsym
->attr
.target
8608 || gfc_expr_attr (target
).pointer
;
8609 if (is_subref_array (target
))
8610 sym
->attr
.subref_array_pointer
= 1;
8613 if (target
->expr_type
== EXPR_NULL
)
8615 gfc_error ("Selector at %L cannot be NULL()", &target
->where
);
8618 else if (target
->ts
.type
== BT_UNKNOWN
)
8620 gfc_error ("Selector at %L has no type", &target
->where
);
8624 /* Get type if this was not already set. Note that it can be
8625 some other type than the target in case this is a SELECT TYPE
8626 selector! So we must not update when the type is already there. */
8627 if (sym
->ts
.type
== BT_UNKNOWN
)
8628 sym
->ts
= target
->ts
;
8630 gcc_assert (sym
->ts
.type
!= BT_UNKNOWN
);
8632 /* See if this is a valid association-to-variable. */
8633 sym
->assoc
->variable
= (target
->expr_type
== EXPR_VARIABLE
8634 && !gfc_has_vector_subscript (target
));
8636 /* Finally resolve if this is an array or not. */
8637 if (sym
->attr
.dimension
&& target
->rank
== 0)
8639 /* primary.c makes the assumption that a reference to an associate
8640 name followed by a left parenthesis is an array reference. */
8641 if (sym
->ts
.type
!= BT_CHARACTER
)
8642 gfc_error ("Associate-name %qs at %L is used as array",
8643 sym
->name
, &sym
->declared_at
);
8644 sym
->attr
.dimension
= 0;
8649 /* We cannot deal with class selectors that need temporaries. */
8650 if (target
->ts
.type
== BT_CLASS
8651 && gfc_ref_needs_temporary_p (target
->ref
))
8653 gfc_error ("CLASS selector at %L needs a temporary which is not "
8654 "yet implemented", &target
->where
);
8658 if (target
->ts
.type
== BT_CLASS
)
8659 gfc_fix_class_refs (target
);
8661 if (target
->rank
!= 0)
8664 /* The rank may be incorrectly guessed at parsing, therefore make sure
8665 it is corrected now. */
8666 if (sym
->ts
.type
!= BT_CLASS
&& (!sym
->as
|| sym
->assoc
->rankguessed
))
8669 sym
->as
= gfc_get_array_spec ();
8671 as
->rank
= target
->rank
;
8672 as
->type
= AS_DEFERRED
;
8673 as
->corank
= gfc_get_corank (target
);
8674 sym
->attr
.dimension
= 1;
8675 if (as
->corank
!= 0)
8676 sym
->attr
.codimension
= 1;
8678 else if (sym
->ts
.type
== BT_CLASS
&& (!CLASS_DATA (sym
)->as
|| sym
->assoc
->rankguessed
))
8680 if (!CLASS_DATA (sym
)->as
)
8681 CLASS_DATA (sym
)->as
= gfc_get_array_spec ();
8682 as
= CLASS_DATA (sym
)->as
;
8683 as
->rank
= target
->rank
;
8684 as
->type
= AS_DEFERRED
;
8685 as
->corank
= gfc_get_corank (target
);
8686 CLASS_DATA (sym
)->attr
.dimension
= 1;
8687 if (as
->corank
!= 0)
8688 CLASS_DATA (sym
)->attr
.codimension
= 1;
8693 /* target's rank is 0, but the type of the sym is still array valued,
8694 which has to be corrected. */
8695 if (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
)->as
)
8698 symbol_attribute attr
;
8699 /* The associated variable's type is still the array type
8700 correct this now. */
8701 gfc_typespec
*ts
= &target
->ts
;
8704 for (ref
= target
->ref
; ref
!= NULL
; ref
= ref
->next
)
8709 ts
= &ref
->u
.c
.component
->ts
;
8712 if (ts
->type
== BT_CLASS
)
8713 ts
= &ts
->u
.derived
->components
->ts
;
8719 /* Create a scalar instance of the current class type. Because the
8720 rank of a class array goes into its name, the type has to be
8721 rebuild. The alternative of (re-)setting just the attributes
8722 and as in the current type, destroys the type also in other
8726 sym
->ts
.type
= BT_CLASS
;
8727 attr
= CLASS_DATA (sym
)->attr
;
8729 attr
.associate_var
= 1;
8730 attr
.dimension
= attr
.codimension
= 0;
8731 attr
.class_pointer
= 1;
8732 if (!gfc_build_class_symbol (&sym
->ts
, &attr
, &as
))
8734 /* Make sure the _vptr is set. */
8735 c
= gfc_find_component (sym
->ts
.u
.derived
, "_vptr", true, true, NULL
);
8736 if (c
->ts
.u
.derived
== NULL
)
8737 c
->ts
.u
.derived
= gfc_find_derived_vtab (sym
->ts
.u
.derived
);
8738 CLASS_DATA (sym
)->attr
.pointer
= 1;
8739 CLASS_DATA (sym
)->attr
.class_pointer
= 1;
8740 gfc_set_sym_referenced (sym
->ts
.u
.derived
);
8741 gfc_commit_symbol (sym
->ts
.u
.derived
);
8742 /* _vptr now has the _vtab in it, change it to the _vtype. */
8743 if (c
->ts
.u
.derived
->attr
.vtab
)
8744 c
->ts
.u
.derived
= c
->ts
.u
.derived
->ts
.u
.derived
;
8745 c
->ts
.u
.derived
->ns
->types_resolved
= 0;
8746 resolve_types (c
->ts
.u
.derived
->ns
);
8750 /* Mark this as an associate variable. */
8751 sym
->attr
.associate_var
= 1;
8753 /* Fix up the type-spec for CHARACTER types. */
8754 if (sym
->ts
.type
== BT_CHARACTER
&& !sym
->attr
.select_type_temporary
)
8757 sym
->ts
.u
.cl
= target
->ts
.u
.cl
;
8759 if (sym
->ts
.deferred
&& target
->expr_type
== EXPR_VARIABLE
8760 && target
->symtree
->n
.sym
->attr
.dummy
8761 && sym
->ts
.u
.cl
== target
->ts
.u
.cl
)
8763 sym
->ts
.u
.cl
= gfc_new_charlen (sym
->ns
, NULL
);
8764 sym
->ts
.deferred
= 1;
8767 if (!sym
->ts
.u
.cl
->length
8768 && !sym
->ts
.deferred
8769 && target
->expr_type
== EXPR_CONSTANT
)
8771 sym
->ts
.u
.cl
->length
=
8772 gfc_get_int_expr (gfc_charlen_int_kind
, NULL
,
8773 target
->value
.character
.length
);
8775 else if ((!sym
->ts
.u
.cl
->length
8776 || sym
->ts
.u
.cl
->length
->expr_type
!= EXPR_CONSTANT
)
8777 && target
->expr_type
!= EXPR_VARIABLE
)
8779 sym
->ts
.u
.cl
= gfc_new_charlen (sym
->ns
, NULL
);
8780 sym
->ts
.deferred
= 1;
8782 /* This is reset in trans-stmt.c after the assignment
8783 of the target expression to the associate name. */
8784 sym
->attr
.allocatable
= 1;
8788 /* If the target is a good class object, so is the associate variable. */
8789 if (sym
->ts
.type
== BT_CLASS
&& gfc_expr_attr (target
).class_ok
)
8790 sym
->attr
.class_ok
= 1;
8794 /* Ensure that SELECT TYPE expressions have the correct rank and a full
8795 array reference, where necessary. The symbols are artificial and so
8796 the dimension attribute and arrayspec can also be set. In addition,
8797 sometimes the expr1 arrives as BT_DERIVED, when the symbol is BT_CLASS.
8798 This is corrected here as well.*/
8801 fixup_array_ref (gfc_expr
**expr1
, gfc_expr
*expr2
,
8802 int rank
, gfc_ref
*ref
)
8804 gfc_ref
*nref
= (*expr1
)->ref
;
8805 gfc_symbol
*sym1
= (*expr1
)->symtree
->n
.sym
;
8806 gfc_symbol
*sym2
= expr2
? expr2
->symtree
->n
.sym
: NULL
;
8807 (*expr1
)->rank
= rank
;
8808 if (sym1
->ts
.type
== BT_CLASS
)
8810 if ((*expr1
)->ts
.type
!= BT_CLASS
)
8811 (*expr1
)->ts
= sym1
->ts
;
8813 CLASS_DATA (sym1
)->attr
.dimension
= 1;
8814 if (CLASS_DATA (sym1
)->as
== NULL
&& sym2
)
8815 CLASS_DATA (sym1
)->as
8816 = gfc_copy_array_spec (CLASS_DATA (sym2
)->as
);
8820 sym1
->attr
.dimension
= 1;
8821 if (sym1
->as
== NULL
&& sym2
)
8822 sym1
->as
= gfc_copy_array_spec (sym2
->as
);
8825 for (; nref
; nref
= nref
->next
)
8826 if (nref
->next
== NULL
)
8829 if (ref
&& nref
&& nref
->type
!= REF_ARRAY
)
8830 nref
->next
= gfc_copy_ref (ref
);
8831 else if (ref
&& !nref
)
8832 (*expr1
)->ref
= gfc_copy_ref (ref
);
8837 build_loc_call (gfc_expr
*sym_expr
)
8840 loc_call
= gfc_get_expr ();
8841 loc_call
->expr_type
= EXPR_FUNCTION
;
8842 gfc_get_sym_tree ("_loc", gfc_current_ns
, &loc_call
->symtree
, false);
8843 loc_call
->symtree
->n
.sym
->attr
.flavor
= FL_PROCEDURE
;
8844 loc_call
->symtree
->n
.sym
->attr
.intrinsic
= 1;
8845 loc_call
->symtree
->n
.sym
->result
= loc_call
->symtree
->n
.sym
;
8846 gfc_commit_symbol (loc_call
->symtree
->n
.sym
);
8847 loc_call
->ts
.type
= BT_INTEGER
;
8848 loc_call
->ts
.kind
= gfc_index_integer_kind
;
8849 loc_call
->value
.function
.isym
= gfc_intrinsic_function_by_id (GFC_ISYM_LOC
);
8850 loc_call
->value
.function
.actual
= gfc_get_actual_arglist ();
8851 loc_call
->value
.function
.actual
->expr
= sym_expr
;
8852 loc_call
->where
= sym_expr
->where
;
8856 /* Resolve a SELECT TYPE statement. */
8859 resolve_select_type (gfc_code
*code
, gfc_namespace
*old_ns
)
8861 gfc_symbol
*selector_type
;
8862 gfc_code
*body
, *new_st
, *if_st
, *tail
;
8863 gfc_code
*class_is
= NULL
, *default_case
= NULL
;
8866 char name
[GFC_MAX_SYMBOL_LEN
];
8870 gfc_ref
* ref
= NULL
;
8871 gfc_expr
*selector_expr
= NULL
;
8873 ns
= code
->ext
.block
.ns
;
8876 /* Check for F03:C813. */
8877 if (code
->expr1
->ts
.type
!= BT_CLASS
8878 && !(code
->expr2
&& code
->expr2
->ts
.type
== BT_CLASS
))
8880 gfc_error ("Selector shall be polymorphic in SELECT TYPE statement "
8881 "at %L", &code
->loc
);
8885 if (!code
->expr1
->symtree
->n
.sym
->attr
.class_ok
)
8890 gfc_ref
*ref2
= NULL
;
8891 for (ref
= code
->expr2
->ref
; ref
!= NULL
; ref
= ref
->next
)
8892 if (ref
->type
== REF_COMPONENT
8893 && ref
->u
.c
.component
->ts
.type
== BT_CLASS
)
8898 if (code
->expr1
->symtree
->n
.sym
->attr
.untyped
)
8899 code
->expr1
->symtree
->n
.sym
->ts
= ref
->u
.c
.component
->ts
;
8900 selector_type
= CLASS_DATA (ref2
->u
.c
.component
)->ts
.u
.derived
;
8904 if (code
->expr1
->symtree
->n
.sym
->attr
.untyped
)
8905 code
->expr1
->symtree
->n
.sym
->ts
= code
->expr2
->ts
;
8906 selector_type
= CLASS_DATA (code
->expr2
)->ts
.u
.derived
;
8909 if (code
->expr2
->rank
&& CLASS_DATA (code
->expr1
)->as
)
8910 CLASS_DATA (code
->expr1
)->as
->rank
= code
->expr2
->rank
;
8912 /* F2008: C803 The selector expression must not be coindexed. */
8913 if (gfc_is_coindexed (code
->expr2
))
8915 gfc_error ("Selector at %L must not be coindexed",
8916 &code
->expr2
->where
);
8923 selector_type
= CLASS_DATA (code
->expr1
)->ts
.u
.derived
;
8925 if (gfc_is_coindexed (code
->expr1
))
8927 gfc_error ("Selector at %L must not be coindexed",
8928 &code
->expr1
->where
);
8933 /* Loop over TYPE IS / CLASS IS cases. */
8934 for (body
= code
->block
; body
; body
= body
->block
)
8936 c
= body
->ext
.block
.case_list
;
8940 /* Check for repeated cases. */
8941 for (tail
= code
->block
; tail
; tail
= tail
->block
)
8943 gfc_case
*d
= tail
->ext
.block
.case_list
;
8947 if (c
->ts
.type
== d
->ts
.type
8948 && ((c
->ts
.type
== BT_DERIVED
8949 && c
->ts
.u
.derived
&& d
->ts
.u
.derived
8950 && !strcmp (c
->ts
.u
.derived
->name
,
8951 d
->ts
.u
.derived
->name
))
8952 || c
->ts
.type
== BT_UNKNOWN
8953 || (!(c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
8954 && c
->ts
.kind
== d
->ts
.kind
)))
8956 gfc_error ("TYPE IS at %L overlaps with TYPE IS at %L",
8957 &c
->where
, &d
->where
);
8963 /* Check F03:C815. */
8964 if ((c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
8965 && !selector_type
->attr
.unlimited_polymorphic
8966 && !gfc_type_is_extensible (c
->ts
.u
.derived
))
8968 gfc_error ("Derived type %qs at %L must be extensible",
8969 c
->ts
.u
.derived
->name
, &c
->where
);
8974 /* Check F03:C816. */
8975 if (c
->ts
.type
!= BT_UNKNOWN
&& !selector_type
->attr
.unlimited_polymorphic
8976 && ((c
->ts
.type
!= BT_DERIVED
&& c
->ts
.type
!= BT_CLASS
)
8977 || !gfc_type_is_extension_of (selector_type
, c
->ts
.u
.derived
)))
8979 if (c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
8980 gfc_error ("Derived type %qs at %L must be an extension of %qs",
8981 c
->ts
.u
.derived
->name
, &c
->where
, selector_type
->name
);
8983 gfc_error ("Unexpected intrinsic type %qs at %L",
8984 gfc_basic_typename (c
->ts
.type
), &c
->where
);
8989 /* Check F03:C814. */
8990 if (c
->ts
.type
== BT_CHARACTER
8991 && (c
->ts
.u
.cl
->length
!= NULL
|| c
->ts
.deferred
))
8993 gfc_error ("The type-spec at %L shall specify that each length "
8994 "type parameter is assumed", &c
->where
);
8999 /* Intercept the DEFAULT case. */
9000 if (c
->ts
.type
== BT_UNKNOWN
)
9002 /* Check F03:C818. */
9005 gfc_error ("The DEFAULT CASE at %L cannot be followed "
9006 "by a second DEFAULT CASE at %L",
9007 &default_case
->ext
.block
.case_list
->where
, &c
->where
);
9012 default_case
= body
;
9019 /* Transform SELECT TYPE statement to BLOCK and associate selector to
9020 target if present. If there are any EXIT statements referring to the
9021 SELECT TYPE construct, this is no problem because the gfc_code
9022 reference stays the same and EXIT is equally possible from the BLOCK
9023 it is changed to. */
9024 code
->op
= EXEC_BLOCK
;
9027 gfc_association_list
* assoc
;
9029 assoc
= gfc_get_association_list ();
9030 assoc
->st
= code
->expr1
->symtree
;
9031 assoc
->target
= gfc_copy_expr (code
->expr2
);
9032 assoc
->target
->where
= code
->expr2
->where
;
9033 /* assoc->variable will be set by resolve_assoc_var. */
9035 code
->ext
.block
.assoc
= assoc
;
9036 code
->expr1
->symtree
->n
.sym
->assoc
= assoc
;
9038 resolve_assoc_var (code
->expr1
->symtree
->n
.sym
, false);
9041 code
->ext
.block
.assoc
= NULL
;
9043 /* Ensure that the selector rank and arrayspec are available to
9044 correct expressions in which they might be missing. */
9045 if (code
->expr2
&& code
->expr2
->rank
)
9047 rank
= code
->expr2
->rank
;
9048 for (ref
= code
->expr2
->ref
; ref
; ref
= ref
->next
)
9049 if (ref
->next
== NULL
)
9051 if (ref
&& ref
->type
== REF_ARRAY
)
9052 ref
= gfc_copy_ref (ref
);
9054 /* Fixup expr1 if necessary. */
9056 fixup_array_ref (&code
->expr1
, code
->expr2
, rank
, ref
);
9058 else if (code
->expr1
->rank
)
9060 rank
= code
->expr1
->rank
;
9061 for (ref
= code
->expr1
->ref
; ref
; ref
= ref
->next
)
9062 if (ref
->next
== NULL
)
9064 if (ref
&& ref
->type
== REF_ARRAY
)
9065 ref
= gfc_copy_ref (ref
);
9068 /* Add EXEC_SELECT to switch on type. */
9069 new_st
= gfc_get_code (code
->op
);
9070 new_st
->expr1
= code
->expr1
;
9071 new_st
->expr2
= code
->expr2
;
9072 new_st
->block
= code
->block
;
9073 code
->expr1
= code
->expr2
= NULL
;
9078 ns
->code
->next
= new_st
;
9080 code
->op
= EXEC_SELECT_TYPE
;
9082 /* Use the intrinsic LOC function to generate an integer expression
9083 for the vtable of the selector. Note that the rank of the selector
9084 expression has to be set to zero. */
9085 gfc_add_vptr_component (code
->expr1
);
9086 code
->expr1
->rank
= 0;
9087 code
->expr1
= build_loc_call (code
->expr1
);
9088 selector_expr
= code
->expr1
->value
.function
.actual
->expr
;
9090 /* Loop over TYPE IS / CLASS IS cases. */
9091 for (body
= code
->block
; body
; body
= body
->block
)
9095 c
= body
->ext
.block
.case_list
;
9097 /* Generate an index integer expression for address of the
9098 TYPE/CLASS vtable and store it in c->low. The hash expression
9099 is stored in c->high and is used to resolve intrinsic cases. */
9100 if (c
->ts
.type
!= BT_UNKNOWN
)
9102 if (c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
9104 vtab
= gfc_find_derived_vtab (c
->ts
.u
.derived
);
9106 c
->high
= gfc_get_int_expr (gfc_integer_4_kind
, NULL
,
9107 c
->ts
.u
.derived
->hash_value
);
9111 vtab
= gfc_find_vtab (&c
->ts
);
9112 gcc_assert (vtab
&& CLASS_DATA (vtab
)->initializer
);
9113 e
= CLASS_DATA (vtab
)->initializer
;
9114 c
->high
= gfc_copy_expr (e
);
9115 if (c
->high
->ts
.kind
!= gfc_integer_4_kind
)
9118 ts
.kind
= gfc_integer_4_kind
;
9119 ts
.type
= BT_INTEGER
;
9120 gfc_convert_type_warn (c
->high
, &ts
, 2, 0);
9124 e
= gfc_lval_expr_from_sym (vtab
);
9125 c
->low
= build_loc_call (e
);
9130 /* Associate temporary to selector. This should only be done
9131 when this case is actually true, so build a new ASSOCIATE
9132 that does precisely this here (instead of using the
9135 if (c
->ts
.type
== BT_CLASS
)
9136 sprintf (name
, "__tmp_class_%s", c
->ts
.u
.derived
->name
);
9137 else if (c
->ts
.type
== BT_DERIVED
)
9138 sprintf (name
, "__tmp_type_%s", c
->ts
.u
.derived
->name
);
9139 else if (c
->ts
.type
== BT_CHARACTER
)
9141 HOST_WIDE_INT charlen
= 0;
9142 if (c
->ts
.u
.cl
&& c
->ts
.u
.cl
->length
9143 && c
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
)
9144 charlen
= gfc_mpz_get_hwi (c
->ts
.u
.cl
->length
->value
.integer
);
9145 snprintf (name
, sizeof (name
),
9146 "__tmp_%s_" HOST_WIDE_INT_PRINT_DEC
"_%d",
9147 gfc_basic_typename (c
->ts
.type
), charlen
, c
->ts
.kind
);
9150 sprintf (name
, "__tmp_%s_%d", gfc_basic_typename (c
->ts
.type
),
9153 st
= gfc_find_symtree (ns
->sym_root
, name
);
9154 gcc_assert (st
->n
.sym
->assoc
);
9155 st
->n
.sym
->assoc
->target
= gfc_get_variable_expr (selector_expr
->symtree
);
9156 st
->n
.sym
->assoc
->target
->where
= selector_expr
->where
;
9157 if (c
->ts
.type
!= BT_CLASS
&& c
->ts
.type
!= BT_UNKNOWN
)
9159 gfc_add_data_component (st
->n
.sym
->assoc
->target
);
9160 /* Fixup the target expression if necessary. */
9162 fixup_array_ref (&st
->n
.sym
->assoc
->target
, NULL
, rank
, ref
);
9165 new_st
= gfc_get_code (EXEC_BLOCK
);
9166 new_st
->ext
.block
.ns
= gfc_build_block_ns (ns
);
9167 new_st
->ext
.block
.ns
->code
= body
->next
;
9168 body
->next
= new_st
;
9170 /* Chain in the new list only if it is marked as dangling. Otherwise
9171 there is a CASE label overlap and this is already used. Just ignore,
9172 the error is diagnosed elsewhere. */
9173 if (st
->n
.sym
->assoc
->dangling
)
9175 new_st
->ext
.block
.assoc
= st
->n
.sym
->assoc
;
9176 st
->n
.sym
->assoc
->dangling
= 0;
9179 resolve_assoc_var (st
->n
.sym
, false);
9182 /* Take out CLASS IS cases for separate treatment. */
9184 while (body
&& body
->block
)
9186 if (body
->block
->ext
.block
.case_list
->ts
.type
== BT_CLASS
)
9188 /* Add to class_is list. */
9189 if (class_is
== NULL
)
9191 class_is
= body
->block
;
9196 for (tail
= class_is
; tail
->block
; tail
= tail
->block
) ;
9197 tail
->block
= body
->block
;
9200 /* Remove from EXEC_SELECT list. */
9201 body
->block
= body
->block
->block
;
9214 /* Add a default case to hold the CLASS IS cases. */
9215 for (tail
= code
; tail
->block
; tail
= tail
->block
) ;
9216 tail
->block
= gfc_get_code (EXEC_SELECT_TYPE
);
9218 tail
->ext
.block
.case_list
= gfc_get_case ();
9219 tail
->ext
.block
.case_list
->ts
.type
= BT_UNKNOWN
;
9221 default_case
= tail
;
9224 /* More than one CLASS IS block? */
9225 if (class_is
->block
)
9229 /* Sort CLASS IS blocks by extension level. */
9233 for (c1
= &class_is
; (*c1
) && (*c1
)->block
; c1
= &((*c1
)->block
))
9236 /* F03:C817 (check for doubles). */
9237 if ((*c1
)->ext
.block
.case_list
->ts
.u
.derived
->hash_value
9238 == c2
->ext
.block
.case_list
->ts
.u
.derived
->hash_value
)
9240 gfc_error ("Double CLASS IS block in SELECT TYPE "
9242 &c2
->ext
.block
.case_list
->where
);
9245 if ((*c1
)->ext
.block
.case_list
->ts
.u
.derived
->attr
.extension
9246 < c2
->ext
.block
.case_list
->ts
.u
.derived
->attr
.extension
)
9249 (*c1
)->block
= c2
->block
;
9259 /* Generate IF chain. */
9260 if_st
= gfc_get_code (EXEC_IF
);
9262 for (body
= class_is
; body
; body
= body
->block
)
9264 new_st
->block
= gfc_get_code (EXEC_IF
);
9265 new_st
= new_st
->block
;
9266 /* Set up IF condition: Call _gfortran_is_extension_of. */
9267 new_st
->expr1
= gfc_get_expr ();
9268 new_st
->expr1
->expr_type
= EXPR_FUNCTION
;
9269 new_st
->expr1
->ts
.type
= BT_LOGICAL
;
9270 new_st
->expr1
->ts
.kind
= 4;
9271 new_st
->expr1
->value
.function
.name
= gfc_get_string (PREFIX ("is_extension_of"));
9272 new_st
->expr1
->value
.function
.isym
= XCNEW (gfc_intrinsic_sym
);
9273 new_st
->expr1
->value
.function
.isym
->id
= GFC_ISYM_EXTENDS_TYPE_OF
;
9274 /* Set up arguments. */
9275 new_st
->expr1
->value
.function
.actual
= gfc_get_actual_arglist ();
9276 new_st
->expr1
->value
.function
.actual
->expr
= gfc_get_variable_expr (selector_expr
->symtree
);
9277 new_st
->expr1
->value
.function
.actual
->expr
->where
= code
->loc
;
9278 new_st
->expr1
->where
= code
->loc
;
9279 gfc_add_vptr_component (new_st
->expr1
->value
.function
.actual
->expr
);
9280 vtab
= gfc_find_derived_vtab (body
->ext
.block
.case_list
->ts
.u
.derived
);
9281 st
= gfc_find_symtree (vtab
->ns
->sym_root
, vtab
->name
);
9282 new_st
->expr1
->value
.function
.actual
->next
= gfc_get_actual_arglist ();
9283 new_st
->expr1
->value
.function
.actual
->next
->expr
= gfc_get_variable_expr (st
);
9284 new_st
->expr1
->value
.function
.actual
->next
->expr
->where
= code
->loc
;
9285 new_st
->next
= body
->next
;
9287 if (default_case
->next
)
9289 new_st
->block
= gfc_get_code (EXEC_IF
);
9290 new_st
= new_st
->block
;
9291 new_st
->next
= default_case
->next
;
9294 /* Replace CLASS DEFAULT code by the IF chain. */
9295 default_case
->next
= if_st
;
9298 /* Resolve the internal code. This can not be done earlier because
9299 it requires that the sym->assoc of selectors is set already. */
9300 gfc_current_ns
= ns
;
9301 gfc_resolve_blocks (code
->block
, gfc_current_ns
);
9302 gfc_current_ns
= old_ns
;
9309 /* Resolve a transfer statement. This is making sure that:
9310 -- a derived type being transferred has only non-pointer components
9311 -- a derived type being transferred doesn't have private components, unless
9312 it's being transferred from the module where the type was defined
9313 -- we're not trying to transfer a whole assumed size array. */
9316 resolve_transfer (gfc_code
*code
)
9318 gfc_symbol
*sym
, *derived
;
9322 bool formatted
= false;
9323 gfc_dt
*dt
= code
->ext
.dt
;
9324 gfc_symbol
*dtio_sub
= NULL
;
9328 while (exp
!= NULL
&& exp
->expr_type
== EXPR_OP
9329 && exp
->value
.op
.op
== INTRINSIC_PARENTHESES
)
9330 exp
= exp
->value
.op
.op1
;
9332 if (exp
&& exp
->expr_type
== EXPR_NULL
9335 gfc_error ("Invalid context for NULL () intrinsic at %L",
9340 if (exp
== NULL
|| (exp
->expr_type
!= EXPR_VARIABLE
9341 && exp
->expr_type
!= EXPR_FUNCTION
9342 && exp
->expr_type
!= EXPR_STRUCTURE
))
9345 /* If we are reading, the variable will be changed. Note that
9346 code->ext.dt may be NULL if the TRANSFER is related to
9347 an INQUIRE statement -- but in this case, we are not reading, either. */
9348 if (dt
&& dt
->dt_io_kind
->value
.iokind
== M_READ
9349 && !gfc_check_vardef_context (exp
, false, false, false,
9353 const gfc_typespec
*ts
= exp
->expr_type
== EXPR_STRUCTURE
9354 || exp
->expr_type
== EXPR_FUNCTION
9355 ? &exp
->ts
: &exp
->symtree
->n
.sym
->ts
;
9357 /* Go to actual component transferred. */
9358 for (ref
= exp
->ref
; ref
; ref
= ref
->next
)
9359 if (ref
->type
== REF_COMPONENT
)
9360 ts
= &ref
->u
.c
.component
->ts
;
9362 if (dt
&& dt
->dt_io_kind
->value
.iokind
!= M_INQUIRE
9363 && (ts
->type
== BT_DERIVED
|| ts
->type
== BT_CLASS
))
9365 if (ts
->type
== BT_DERIVED
|| ts
->type
== BT_CLASS
)
9366 derived
= ts
->u
.derived
;
9368 derived
= ts
->u
.derived
->components
->ts
.u
.derived
;
9370 /* Determine when to use the formatted DTIO procedure. */
9371 if (dt
&& (dt
->format_expr
|| dt
->format_label
))
9374 write
= dt
->dt_io_kind
->value
.iokind
== M_WRITE
9375 || dt
->dt_io_kind
->value
.iokind
== M_PRINT
;
9376 dtio_sub
= gfc_find_specific_dtio_proc (derived
, write
, formatted
);
9378 if (dtio_sub
!= NULL
&& exp
->expr_type
== EXPR_VARIABLE
)
9381 sym
= exp
->symtree
->n
.sym
->ns
->proc_name
;
9382 /* Check to see if this is a nested DTIO call, with the
9383 dummy as the io-list object. */
9384 if (sym
&& sym
== dtio_sub
&& sym
->formal
9385 && sym
->formal
->sym
== exp
->symtree
->n
.sym
9386 && exp
->ref
== NULL
)
9388 if (!sym
->attr
.recursive
)
9390 gfc_error ("DTIO %s procedure at %L must be recursive",
9391 sym
->name
, &sym
->declared_at
);
9398 if (ts
->type
== BT_CLASS
&& dtio_sub
== NULL
)
9400 gfc_error ("Data transfer element at %L cannot be polymorphic unless "
9401 "it is processed by a defined input/output procedure",
9406 if (ts
->type
== BT_DERIVED
)
9408 /* Check that transferred derived type doesn't contain POINTER
9409 components unless it is processed by a defined input/output
9411 if (ts
->u
.derived
->attr
.pointer_comp
&& dtio_sub
== NULL
)
9413 gfc_error ("Data transfer element at %L cannot have POINTER "
9414 "components unless it is processed by a defined "
9415 "input/output procedure", &code
->loc
);
9420 if (ts
->u
.derived
->attr
.proc_pointer_comp
)
9422 gfc_error ("Data transfer element at %L cannot have "
9423 "procedure pointer components", &code
->loc
);
9427 if (ts
->u
.derived
->attr
.alloc_comp
&& dtio_sub
== NULL
)
9429 gfc_error ("Data transfer element at %L cannot have ALLOCATABLE "
9430 "components unless it is processed by a defined "
9431 "input/output procedure", &code
->loc
);
9435 /* C_PTR and C_FUNPTR have private components which means they can not
9436 be printed. However, if -std=gnu and not -pedantic, allow
9437 the component to be printed to help debugging. */
9438 if (ts
->u
.derived
->ts
.f90_type
== BT_VOID
)
9440 if (!gfc_notify_std (GFC_STD_GNU
, "Data transfer element at %L "
9441 "cannot have PRIVATE components", &code
->loc
))
9444 else if (derived_inaccessible (ts
->u
.derived
) && dtio_sub
== NULL
)
9446 gfc_error ("Data transfer element at %L cannot have "
9447 "PRIVATE components unless it is processed by "
9448 "a defined input/output procedure", &code
->loc
);
9453 if (exp
->expr_type
== EXPR_STRUCTURE
)
9456 sym
= exp
->symtree
->n
.sym
;
9458 if (sym
->as
!= NULL
&& sym
->as
->type
== AS_ASSUMED_SIZE
&& exp
->ref
9459 && exp
->ref
->type
== REF_ARRAY
&& exp
->ref
->u
.ar
.type
== AR_FULL
)
9461 gfc_error ("Data transfer element at %L cannot be a full reference to "
9462 "an assumed-size array", &code
->loc
);
9466 if (async_io_dt
&& exp
->expr_type
== EXPR_VARIABLE
)
9467 exp
->symtree
->n
.sym
->attr
.asynchronous
= 1;
9471 /*********** Toplevel code resolution subroutines ***********/
9473 /* Find the set of labels that are reachable from this block. We also
9474 record the last statement in each block. */
9477 find_reachable_labels (gfc_code
*block
)
9484 cs_base
->reachable_labels
= bitmap_alloc (&labels_obstack
);
9486 /* Collect labels in this block. We don't keep those corresponding
9487 to END {IF|SELECT}, these are checked in resolve_branch by going
9488 up through the code_stack. */
9489 for (c
= block
; c
; c
= c
->next
)
9491 if (c
->here
&& c
->op
!= EXEC_END_NESTED_BLOCK
)
9492 bitmap_set_bit (cs_base
->reachable_labels
, c
->here
->value
);
9495 /* Merge with labels from parent block. */
9498 gcc_assert (cs_base
->prev
->reachable_labels
);
9499 bitmap_ior_into (cs_base
->reachable_labels
,
9500 cs_base
->prev
->reachable_labels
);
9506 resolve_lock_unlock_event (gfc_code
*code
)
9508 if (code
->expr1
->expr_type
== EXPR_FUNCTION
9509 && code
->expr1
->value
.function
.isym
9510 && code
->expr1
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
)
9511 remove_caf_get_intrinsic (code
->expr1
);
9513 if ((code
->op
== EXEC_LOCK
|| code
->op
== EXEC_UNLOCK
)
9514 && (code
->expr1
->ts
.type
!= BT_DERIVED
9515 || code
->expr1
->expr_type
!= EXPR_VARIABLE
9516 || code
->expr1
->ts
.u
.derived
->from_intmod
!= INTMOD_ISO_FORTRAN_ENV
9517 || code
->expr1
->ts
.u
.derived
->intmod_sym_id
!= ISOFORTRAN_LOCK_TYPE
9518 || code
->expr1
->rank
!= 0
9519 || (!gfc_is_coarray (code
->expr1
) &&
9520 !gfc_is_coindexed (code
->expr1
))))
9521 gfc_error ("Lock variable at %L must be a scalar of type LOCK_TYPE",
9522 &code
->expr1
->where
);
9523 else if ((code
->op
== EXEC_EVENT_POST
|| code
->op
== EXEC_EVENT_WAIT
)
9524 && (code
->expr1
->ts
.type
!= BT_DERIVED
9525 || code
->expr1
->expr_type
!= EXPR_VARIABLE
9526 || code
->expr1
->ts
.u
.derived
->from_intmod
9527 != INTMOD_ISO_FORTRAN_ENV
9528 || code
->expr1
->ts
.u
.derived
->intmod_sym_id
9529 != ISOFORTRAN_EVENT_TYPE
9530 || code
->expr1
->rank
!= 0))
9531 gfc_error ("Event variable at %L must be a scalar of type EVENT_TYPE",
9532 &code
->expr1
->where
);
9533 else if (code
->op
== EXEC_EVENT_POST
&& !gfc_is_coarray (code
->expr1
)
9534 && !gfc_is_coindexed (code
->expr1
))
9535 gfc_error ("Event variable argument at %L must be a coarray or coindexed",
9536 &code
->expr1
->where
);
9537 else if (code
->op
== EXEC_EVENT_WAIT
&& !gfc_is_coarray (code
->expr1
))
9538 gfc_error ("Event variable argument at %L must be a coarray but not "
9539 "coindexed", &code
->expr1
->where
);
9543 && (code
->expr2
->ts
.type
!= BT_INTEGER
|| code
->expr2
->rank
!= 0
9544 || code
->expr2
->expr_type
!= EXPR_VARIABLE
))
9545 gfc_error ("STAT= argument at %L must be a scalar INTEGER variable",
9546 &code
->expr2
->where
);
9549 && !gfc_check_vardef_context (code
->expr2
, false, false, false,
9550 _("STAT variable")))
9555 && (code
->expr3
->ts
.type
!= BT_CHARACTER
|| code
->expr3
->rank
!= 0
9556 || code
->expr3
->expr_type
!= EXPR_VARIABLE
))
9557 gfc_error ("ERRMSG= argument at %L must be a scalar CHARACTER variable",
9558 &code
->expr3
->where
);
9561 && !gfc_check_vardef_context (code
->expr3
, false, false, false,
9562 _("ERRMSG variable")))
9565 /* Check for LOCK the ACQUIRED_LOCK. */
9566 if (code
->op
!= EXEC_EVENT_WAIT
&& code
->expr4
9567 && (code
->expr4
->ts
.type
!= BT_LOGICAL
|| code
->expr4
->rank
!= 0
9568 || code
->expr4
->expr_type
!= EXPR_VARIABLE
))
9569 gfc_error ("ACQUIRED_LOCK= argument at %L must be a scalar LOGICAL "
9570 "variable", &code
->expr4
->where
);
9572 if (code
->op
!= EXEC_EVENT_WAIT
&& code
->expr4
9573 && !gfc_check_vardef_context (code
->expr4
, false, false, false,
9574 _("ACQUIRED_LOCK variable")))
9577 /* Check for EVENT WAIT the UNTIL_COUNT. */
9578 if (code
->op
== EXEC_EVENT_WAIT
&& code
->expr4
)
9580 if (!gfc_resolve_expr (code
->expr4
) || code
->expr4
->ts
.type
!= BT_INTEGER
9581 || code
->expr4
->rank
!= 0)
9582 gfc_error ("UNTIL_COUNT= argument at %L must be a scalar INTEGER "
9583 "expression", &code
->expr4
->where
);
9589 resolve_critical (gfc_code
*code
)
9591 gfc_symtree
*symtree
;
9592 gfc_symbol
*lock_type
;
9593 char name
[GFC_MAX_SYMBOL_LEN
];
9594 static int serial
= 0;
9596 if (flag_coarray
!= GFC_FCOARRAY_LIB
)
9599 symtree
= gfc_find_symtree (gfc_current_ns
->sym_root
,
9600 GFC_PREFIX ("lock_type"));
9602 lock_type
= symtree
->n
.sym
;
9605 if (gfc_get_sym_tree (GFC_PREFIX ("lock_type"), gfc_current_ns
, &symtree
,
9608 lock_type
= symtree
->n
.sym
;
9609 lock_type
->attr
.flavor
= FL_DERIVED
;
9610 lock_type
->attr
.zero_comp
= 1;
9611 lock_type
->from_intmod
= INTMOD_ISO_FORTRAN_ENV
;
9612 lock_type
->intmod_sym_id
= ISOFORTRAN_LOCK_TYPE
;
9615 sprintf(name
, GFC_PREFIX ("lock_var") "%d",serial
++);
9616 if (gfc_get_sym_tree (name
, gfc_current_ns
, &symtree
, false) != 0)
9619 code
->resolved_sym
= symtree
->n
.sym
;
9620 symtree
->n
.sym
->attr
.flavor
= FL_VARIABLE
;
9621 symtree
->n
.sym
->attr
.referenced
= 1;
9622 symtree
->n
.sym
->attr
.artificial
= 1;
9623 symtree
->n
.sym
->attr
.codimension
= 1;
9624 symtree
->n
.sym
->ts
.type
= BT_DERIVED
;
9625 symtree
->n
.sym
->ts
.u
.derived
= lock_type
;
9626 symtree
->n
.sym
->as
= gfc_get_array_spec ();
9627 symtree
->n
.sym
->as
->corank
= 1;
9628 symtree
->n
.sym
->as
->type
= AS_EXPLICIT
;
9629 symtree
->n
.sym
->as
->cotype
= AS_EXPLICIT
;
9630 symtree
->n
.sym
->as
->lower
[0] = gfc_get_int_expr (gfc_default_integer_kind
,
9632 gfc_commit_symbols();
9637 resolve_sync (gfc_code
*code
)
9639 /* Check imageset. The * case matches expr1 == NULL. */
9642 if (code
->expr1
->ts
.type
!= BT_INTEGER
|| code
->expr1
->rank
> 1)
9643 gfc_error ("Imageset argument at %L must be a scalar or rank-1 "
9644 "INTEGER expression", &code
->expr1
->where
);
9645 if (code
->expr1
->expr_type
== EXPR_CONSTANT
&& code
->expr1
->rank
== 0
9646 && mpz_cmp_si (code
->expr1
->value
.integer
, 1) < 0)
9647 gfc_error ("Imageset argument at %L must between 1 and num_images()",
9648 &code
->expr1
->where
);
9649 else if (code
->expr1
->expr_type
== EXPR_ARRAY
9650 && gfc_simplify_expr (code
->expr1
, 0))
9652 gfc_constructor
*cons
;
9653 cons
= gfc_constructor_first (code
->expr1
->value
.constructor
);
9654 for (; cons
; cons
= gfc_constructor_next (cons
))
9655 if (cons
->expr
->expr_type
== EXPR_CONSTANT
9656 && mpz_cmp_si (cons
->expr
->value
.integer
, 1) < 0)
9657 gfc_error ("Imageset argument at %L must between 1 and "
9658 "num_images()", &cons
->expr
->where
);
9663 gfc_resolve_expr (code
->expr2
);
9665 && (code
->expr2
->ts
.type
!= BT_INTEGER
|| code
->expr2
->rank
!= 0
9666 || code
->expr2
->expr_type
!= EXPR_VARIABLE
))
9667 gfc_error ("STAT= argument at %L must be a scalar INTEGER variable",
9668 &code
->expr2
->where
);
9671 gfc_resolve_expr (code
->expr3
);
9673 && (code
->expr3
->ts
.type
!= BT_CHARACTER
|| code
->expr3
->rank
!= 0
9674 || code
->expr3
->expr_type
!= EXPR_VARIABLE
))
9675 gfc_error ("ERRMSG= argument at %L must be a scalar CHARACTER variable",
9676 &code
->expr3
->where
);
9680 /* Given a branch to a label, see if the branch is conforming.
9681 The code node describes where the branch is located. */
9684 resolve_branch (gfc_st_label
*label
, gfc_code
*code
)
9691 /* Step one: is this a valid branching target? */
9693 if (label
->defined
== ST_LABEL_UNKNOWN
)
9695 gfc_error ("Label %d referenced at %L is never defined", label
->value
,
9700 if (label
->defined
!= ST_LABEL_TARGET
&& label
->defined
!= ST_LABEL_DO_TARGET
)
9702 gfc_error ("Statement at %L is not a valid branch target statement "
9703 "for the branch statement at %L", &label
->where
, &code
->loc
);
9707 /* Step two: make sure this branch is not a branch to itself ;-) */
9709 if (code
->here
== label
)
9712 "Branch at %L may result in an infinite loop", &code
->loc
);
9716 /* Step three: See if the label is in the same block as the
9717 branching statement. The hard work has been done by setting up
9718 the bitmap reachable_labels. */
9720 if (bitmap_bit_p (cs_base
->reachable_labels
, label
->value
))
9722 /* Check now whether there is a CRITICAL construct; if so, check
9723 whether the label is still visible outside of the CRITICAL block,
9724 which is invalid. */
9725 for (stack
= cs_base
; stack
; stack
= stack
->prev
)
9727 if (stack
->current
->op
== EXEC_CRITICAL
9728 && bitmap_bit_p (stack
->reachable_labels
, label
->value
))
9729 gfc_error ("GOTO statement at %L leaves CRITICAL construct for "
9730 "label at %L", &code
->loc
, &label
->where
);
9731 else if (stack
->current
->op
== EXEC_DO_CONCURRENT
9732 && bitmap_bit_p (stack
->reachable_labels
, label
->value
))
9733 gfc_error ("GOTO statement at %L leaves DO CONCURRENT construct "
9734 "for label at %L", &code
->loc
, &label
->where
);
9740 /* Step four: If we haven't found the label in the bitmap, it may
9741 still be the label of the END of the enclosing block, in which
9742 case we find it by going up the code_stack. */
9744 for (stack
= cs_base
; stack
; stack
= stack
->prev
)
9746 if (stack
->current
->next
&& stack
->current
->next
->here
== label
)
9748 if (stack
->current
->op
== EXEC_CRITICAL
)
9750 /* Note: A label at END CRITICAL does not leave the CRITICAL
9751 construct as END CRITICAL is still part of it. */
9752 gfc_error ("GOTO statement at %L leaves CRITICAL construct for label"
9753 " at %L", &code
->loc
, &label
->where
);
9756 else if (stack
->current
->op
== EXEC_DO_CONCURRENT
)
9758 gfc_error ("GOTO statement at %L leaves DO CONCURRENT construct for "
9759 "label at %L", &code
->loc
, &label
->where
);
9766 gcc_assert (stack
->current
->next
->op
== EXEC_END_NESTED_BLOCK
);
9770 /* The label is not in an enclosing block, so illegal. This was
9771 allowed in Fortran 66, so we allow it as extension. No
9772 further checks are necessary in this case. */
9773 gfc_notify_std (GFC_STD_LEGACY
, "Label at %L is not in the same block "
9774 "as the GOTO statement at %L", &label
->where
,
9780 /* Check whether EXPR1 has the same shape as EXPR2. */
9783 resolve_where_shape (gfc_expr
*expr1
, gfc_expr
*expr2
)
9785 mpz_t shape
[GFC_MAX_DIMENSIONS
];
9786 mpz_t shape2
[GFC_MAX_DIMENSIONS
];
9787 bool result
= false;
9790 /* Compare the rank. */
9791 if (expr1
->rank
!= expr2
->rank
)
9794 /* Compare the size of each dimension. */
9795 for (i
=0; i
<expr1
->rank
; i
++)
9797 if (!gfc_array_dimen_size (expr1
, i
, &shape
[i
]))
9800 if (!gfc_array_dimen_size (expr2
, i
, &shape2
[i
]))
9803 if (mpz_cmp (shape
[i
], shape2
[i
]))
9807 /* When either of the two expression is an assumed size array, we
9808 ignore the comparison of dimension sizes. */
9813 gfc_clear_shape (shape
, i
);
9814 gfc_clear_shape (shape2
, i
);
9819 /* Check whether a WHERE assignment target or a WHERE mask expression
9820 has the same shape as the outmost WHERE mask expression. */
9823 resolve_where (gfc_code
*code
, gfc_expr
*mask
)
9829 cblock
= code
->block
;
9831 /* Store the first WHERE mask-expr of the WHERE statement or construct.
9832 In case of nested WHERE, only the outmost one is stored. */
9833 if (mask
== NULL
) /* outmost WHERE */
9835 else /* inner WHERE */
9842 /* Check if the mask-expr has a consistent shape with the
9843 outmost WHERE mask-expr. */
9844 if (!resolve_where_shape (cblock
->expr1
, e
))
9845 gfc_error ("WHERE mask at %L has inconsistent shape",
9846 &cblock
->expr1
->where
);
9849 /* the assignment statement of a WHERE statement, or the first
9850 statement in where-body-construct of a WHERE construct */
9851 cnext
= cblock
->next
;
9856 /* WHERE assignment statement */
9859 /* Check shape consistent for WHERE assignment target. */
9860 if (e
&& !resolve_where_shape (cnext
->expr1
, e
))
9861 gfc_error ("WHERE assignment target at %L has "
9862 "inconsistent shape", &cnext
->expr1
->where
);
9866 case EXEC_ASSIGN_CALL
:
9867 resolve_call (cnext
);
9868 if (!cnext
->resolved_sym
->attr
.elemental
)
9869 gfc_error("Non-ELEMENTAL user-defined assignment in WHERE at %L",
9870 &cnext
->ext
.actual
->expr
->where
);
9873 /* WHERE or WHERE construct is part of a where-body-construct */
9875 resolve_where (cnext
, e
);
9879 gfc_error ("Unsupported statement inside WHERE at %L",
9882 /* the next statement within the same where-body-construct */
9883 cnext
= cnext
->next
;
9885 /* the next masked-elsewhere-stmt, elsewhere-stmt, or end-where-stmt */
9886 cblock
= cblock
->block
;
9891 /* Resolve assignment in FORALL construct.
9892 NVAR is the number of FORALL index variables, and VAR_EXPR records the
9893 FORALL index variables. */
9896 gfc_resolve_assign_in_forall (gfc_code
*code
, int nvar
, gfc_expr
**var_expr
)
9900 for (n
= 0; n
< nvar
; n
++)
9902 gfc_symbol
*forall_index
;
9904 forall_index
= var_expr
[n
]->symtree
->n
.sym
;
9906 /* Check whether the assignment target is one of the FORALL index
9908 if ((code
->expr1
->expr_type
== EXPR_VARIABLE
)
9909 && (code
->expr1
->symtree
->n
.sym
== forall_index
))
9910 gfc_error ("Assignment to a FORALL index variable at %L",
9911 &code
->expr1
->where
);
9914 /* If one of the FORALL index variables doesn't appear in the
9915 assignment variable, then there could be a many-to-one
9916 assignment. Emit a warning rather than an error because the
9917 mask could be resolving this problem. */
9918 if (!find_forall_index (code
->expr1
, forall_index
, 0))
9919 gfc_warning (0, "The FORALL with index %qs is not used on the "
9920 "left side of the assignment at %L and so might "
9921 "cause multiple assignment to this object",
9922 var_expr
[n
]->symtree
->name
, &code
->expr1
->where
);
9928 /* Resolve WHERE statement in FORALL construct. */
9931 gfc_resolve_where_code_in_forall (gfc_code
*code
, int nvar
,
9932 gfc_expr
**var_expr
)
9937 cblock
= code
->block
;
9940 /* the assignment statement of a WHERE statement, or the first
9941 statement in where-body-construct of a WHERE construct */
9942 cnext
= cblock
->next
;
9947 /* WHERE assignment statement */
9949 gfc_resolve_assign_in_forall (cnext
, nvar
, var_expr
);
9952 /* WHERE operator assignment statement */
9953 case EXEC_ASSIGN_CALL
:
9954 resolve_call (cnext
);
9955 if (!cnext
->resolved_sym
->attr
.elemental
)
9956 gfc_error("Non-ELEMENTAL user-defined assignment in WHERE at %L",
9957 &cnext
->ext
.actual
->expr
->where
);
9960 /* WHERE or WHERE construct is part of a where-body-construct */
9962 gfc_resolve_where_code_in_forall (cnext
, nvar
, var_expr
);
9966 gfc_error ("Unsupported statement inside WHERE at %L",
9969 /* the next statement within the same where-body-construct */
9970 cnext
= cnext
->next
;
9972 /* the next masked-elsewhere-stmt, elsewhere-stmt, or end-where-stmt */
9973 cblock
= cblock
->block
;
9978 /* Traverse the FORALL body to check whether the following errors exist:
9979 1. For assignment, check if a many-to-one assignment happens.
9980 2. For WHERE statement, check the WHERE body to see if there is any
9981 many-to-one assignment. */
9984 gfc_resolve_forall_body (gfc_code
*code
, int nvar
, gfc_expr
**var_expr
)
9988 c
= code
->block
->next
;
9994 case EXEC_POINTER_ASSIGN
:
9995 gfc_resolve_assign_in_forall (c
, nvar
, var_expr
);
9998 case EXEC_ASSIGN_CALL
:
10002 /* Because the gfc_resolve_blocks() will handle the nested FORALL,
10003 there is no need to handle it here. */
10007 gfc_resolve_where_code_in_forall(c
, nvar
, var_expr
);
10012 /* The next statement in the FORALL body. */
10018 /* Counts the number of iterators needed inside a forall construct, including
10019 nested forall constructs. This is used to allocate the needed memory
10020 in gfc_resolve_forall. */
10023 gfc_count_forall_iterators (gfc_code
*code
)
10025 int max_iters
, sub_iters
, current_iters
;
10026 gfc_forall_iterator
*fa
;
10028 gcc_assert(code
->op
== EXEC_FORALL
);
10032 for (fa
= code
->ext
.forall_iterator
; fa
; fa
= fa
->next
)
10035 code
= code
->block
->next
;
10039 if (code
->op
== EXEC_FORALL
)
10041 sub_iters
= gfc_count_forall_iterators (code
);
10042 if (sub_iters
> max_iters
)
10043 max_iters
= sub_iters
;
10048 return current_iters
+ max_iters
;
10052 /* Given a FORALL construct, first resolve the FORALL iterator, then call
10053 gfc_resolve_forall_body to resolve the FORALL body. */
10056 gfc_resolve_forall (gfc_code
*code
, gfc_namespace
*ns
, int forall_save
)
10058 static gfc_expr
**var_expr
;
10059 static int total_var
= 0;
10060 static int nvar
= 0;
10061 int i
, old_nvar
, tmp
;
10062 gfc_forall_iterator
*fa
;
10066 if (!gfc_notify_std (GFC_STD_F2018_OBS
, "FORALL construct at %L", &code
->loc
))
10069 /* Start to resolve a FORALL construct */
10070 if (forall_save
== 0)
10072 /* Count the total number of FORALL indices in the nested FORALL
10073 construct in order to allocate the VAR_EXPR with proper size. */
10074 total_var
= gfc_count_forall_iterators (code
);
10076 /* Allocate VAR_EXPR with NUMBER_OF_FORALL_INDEX elements. */
10077 var_expr
= XCNEWVEC (gfc_expr
*, total_var
);
10080 /* The information about FORALL iterator, including FORALL indices start, end
10081 and stride. An outer FORALL indice cannot appear in start, end or stride. */
10082 for (fa
= code
->ext
.forall_iterator
; fa
; fa
= fa
->next
)
10084 /* Fortran 20008: C738 (R753). */
10085 if (fa
->var
->ref
&& fa
->var
->ref
->type
== REF_ARRAY
)
10087 gfc_error ("FORALL index-name at %L must be a scalar variable "
10088 "of type integer", &fa
->var
->where
);
10092 /* Check if any outer FORALL index name is the same as the current
10094 for (i
= 0; i
< nvar
; i
++)
10096 if (fa
->var
->symtree
->n
.sym
== var_expr
[i
]->symtree
->n
.sym
)
10097 gfc_error ("An outer FORALL construct already has an index "
10098 "with this name %L", &fa
->var
->where
);
10101 /* Record the current FORALL index. */
10102 var_expr
[nvar
] = gfc_copy_expr (fa
->var
);
10106 /* No memory leak. */
10107 gcc_assert (nvar
<= total_var
);
10110 /* Resolve the FORALL body. */
10111 gfc_resolve_forall_body (code
, nvar
, var_expr
);
10113 /* May call gfc_resolve_forall to resolve the inner FORALL loop. */
10114 gfc_resolve_blocks (code
->block
, ns
);
10118 /* Free only the VAR_EXPRs allocated in this frame. */
10119 for (i
= nvar
; i
< tmp
; i
++)
10120 gfc_free_expr (var_expr
[i
]);
10124 /* We are in the outermost FORALL construct. */
10125 gcc_assert (forall_save
== 0);
10127 /* VAR_EXPR is not needed any more. */
10134 /* Resolve a BLOCK construct statement. */
10137 resolve_block_construct (gfc_code
* code
)
10139 /* Resolve the BLOCK's namespace. */
10140 gfc_resolve (code
->ext
.block
.ns
);
10142 /* For an ASSOCIATE block, the associations (and their targets) are already
10143 resolved during resolve_symbol. */
10147 /* Resolve lists of blocks found in IF, SELECT CASE, WHERE, FORALL, GOTO and
10151 gfc_resolve_blocks (gfc_code
*b
, gfc_namespace
*ns
)
10155 for (; b
; b
= b
->block
)
10157 t
= gfc_resolve_expr (b
->expr1
);
10158 if (!gfc_resolve_expr (b
->expr2
))
10164 if (t
&& b
->expr1
!= NULL
10165 && (b
->expr1
->ts
.type
!= BT_LOGICAL
|| b
->expr1
->rank
!= 0))
10166 gfc_error ("IF clause at %L requires a scalar LOGICAL expression",
10172 && b
->expr1
!= NULL
10173 && (b
->expr1
->ts
.type
!= BT_LOGICAL
|| b
->expr1
->rank
== 0))
10174 gfc_error ("WHERE/ELSEWHERE clause at %L requires a LOGICAL array",
10179 resolve_branch (b
->label1
, b
);
10183 resolve_block_construct (b
);
10187 case EXEC_SELECT_TYPE
:
10190 case EXEC_DO_WHILE
:
10191 case EXEC_DO_CONCURRENT
:
10192 case EXEC_CRITICAL
:
10195 case EXEC_IOLENGTH
:
10199 case EXEC_OMP_ATOMIC
:
10200 case EXEC_OACC_ATOMIC
:
10202 gfc_omp_atomic_op aop
10203 = (gfc_omp_atomic_op
) (b
->ext
.omp_atomic
& GFC_OMP_ATOMIC_MASK
);
10205 /* Verify this before calling gfc_resolve_code, which might
10207 gcc_assert (b
->next
&& b
->next
->op
== EXEC_ASSIGN
);
10208 gcc_assert (((aop
!= GFC_OMP_ATOMIC_CAPTURE
)
10209 && b
->next
->next
== NULL
)
10210 || ((aop
== GFC_OMP_ATOMIC_CAPTURE
)
10211 && b
->next
->next
!= NULL
10212 && b
->next
->next
->op
== EXEC_ASSIGN
10213 && b
->next
->next
->next
== NULL
));
10217 case EXEC_OACC_PARALLEL_LOOP
:
10218 case EXEC_OACC_PARALLEL
:
10219 case EXEC_OACC_KERNELS_LOOP
:
10220 case EXEC_OACC_KERNELS
:
10221 case EXEC_OACC_DATA
:
10222 case EXEC_OACC_HOST_DATA
:
10223 case EXEC_OACC_LOOP
:
10224 case EXEC_OACC_UPDATE
:
10225 case EXEC_OACC_WAIT
:
10226 case EXEC_OACC_CACHE
:
10227 case EXEC_OACC_ENTER_DATA
:
10228 case EXEC_OACC_EXIT_DATA
:
10229 case EXEC_OACC_ROUTINE
:
10230 case EXEC_OMP_CRITICAL
:
10231 case EXEC_OMP_DISTRIBUTE
:
10232 case EXEC_OMP_DISTRIBUTE_PARALLEL_DO
:
10233 case EXEC_OMP_DISTRIBUTE_PARALLEL_DO_SIMD
:
10234 case EXEC_OMP_DISTRIBUTE_SIMD
:
10236 case EXEC_OMP_DO_SIMD
:
10237 case EXEC_OMP_MASTER
:
10238 case EXEC_OMP_ORDERED
:
10239 case EXEC_OMP_PARALLEL
:
10240 case EXEC_OMP_PARALLEL_DO
:
10241 case EXEC_OMP_PARALLEL_DO_SIMD
:
10242 case EXEC_OMP_PARALLEL_SECTIONS
:
10243 case EXEC_OMP_PARALLEL_WORKSHARE
:
10244 case EXEC_OMP_SECTIONS
:
10245 case EXEC_OMP_SIMD
:
10246 case EXEC_OMP_SINGLE
:
10247 case EXEC_OMP_TARGET
:
10248 case EXEC_OMP_TARGET_DATA
:
10249 case EXEC_OMP_TARGET_ENTER_DATA
:
10250 case EXEC_OMP_TARGET_EXIT_DATA
:
10251 case EXEC_OMP_TARGET_PARALLEL
:
10252 case EXEC_OMP_TARGET_PARALLEL_DO
:
10253 case EXEC_OMP_TARGET_PARALLEL_DO_SIMD
:
10254 case EXEC_OMP_TARGET_SIMD
:
10255 case EXEC_OMP_TARGET_TEAMS
:
10256 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE
:
10257 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO
:
10258 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
10259 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_SIMD
:
10260 case EXEC_OMP_TARGET_UPDATE
:
10261 case EXEC_OMP_TASK
:
10262 case EXEC_OMP_TASKGROUP
:
10263 case EXEC_OMP_TASKLOOP
:
10264 case EXEC_OMP_TASKLOOP_SIMD
:
10265 case EXEC_OMP_TASKWAIT
:
10266 case EXEC_OMP_TASKYIELD
:
10267 case EXEC_OMP_TEAMS
:
10268 case EXEC_OMP_TEAMS_DISTRIBUTE
:
10269 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO
:
10270 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
10271 case EXEC_OMP_TEAMS_DISTRIBUTE_SIMD
:
10272 case EXEC_OMP_WORKSHARE
:
10276 gfc_internal_error ("gfc_resolve_blocks(): Bad block type");
10279 gfc_resolve_code (b
->next
, ns
);
10284 /* Does everything to resolve an ordinary assignment. Returns true
10285 if this is an interface assignment. */
10287 resolve_ordinary_assign (gfc_code
*code
, gfc_namespace
*ns
)
10294 symbol_attribute attr
;
10296 if (gfc_extend_assign (code
, ns
))
10300 if (code
->op
== EXEC_ASSIGN_CALL
)
10302 lhs
= code
->ext
.actual
->expr
;
10303 rhsptr
= &code
->ext
.actual
->next
->expr
;
10307 gfc_actual_arglist
* args
;
10308 gfc_typebound_proc
* tbp
;
10310 gcc_assert (code
->op
== EXEC_COMPCALL
);
10312 args
= code
->expr1
->value
.compcall
.actual
;
10314 rhsptr
= &args
->next
->expr
;
10316 tbp
= code
->expr1
->value
.compcall
.tbp
;
10317 gcc_assert (!tbp
->is_generic
);
10320 /* Make a temporary rhs when there is a default initializer
10321 and rhs is the same symbol as the lhs. */
10322 if ((*rhsptr
)->expr_type
== EXPR_VARIABLE
10323 && (*rhsptr
)->symtree
->n
.sym
->ts
.type
== BT_DERIVED
10324 && gfc_has_default_initializer ((*rhsptr
)->symtree
->n
.sym
->ts
.u
.derived
)
10325 && (lhs
->symtree
->n
.sym
== (*rhsptr
)->symtree
->n
.sym
))
10326 *rhsptr
= gfc_get_parentheses (*rhsptr
);
10335 && !gfc_notify_std (GFC_STD_GNU
, "BOZ literal at %L outside "
10336 "a DATA statement and outside INT/REAL/DBLE/CMPLX",
10340 /* Handle the case of a BOZ literal on the RHS. */
10341 if (rhs
->is_boz
&& lhs
->ts
.type
!= BT_INTEGER
)
10344 if (warn_surprising
)
10345 gfc_warning (OPT_Wsurprising
,
10346 "BOZ literal at %L is bitwise transferred "
10347 "non-integer symbol %qs", &code
->loc
,
10348 lhs
->symtree
->n
.sym
->name
);
10350 if (!gfc_convert_boz (rhs
, &lhs
->ts
))
10352 if ((rc
= gfc_range_check (rhs
)) != ARITH_OK
)
10354 if (rc
== ARITH_UNDERFLOW
)
10355 gfc_error ("Arithmetic underflow of bit-wise transferred BOZ at %L"
10356 ". This check can be disabled with the option "
10357 "%<-fno-range-check%>", &rhs
->where
);
10358 else if (rc
== ARITH_OVERFLOW
)
10359 gfc_error ("Arithmetic overflow of bit-wise transferred BOZ at %L"
10360 ". This check can be disabled with the option "
10361 "%<-fno-range-check%>", &rhs
->where
);
10362 else if (rc
== ARITH_NAN
)
10363 gfc_error ("Arithmetic NaN of bit-wise transferred BOZ at %L"
10364 ". This check can be disabled with the option "
10365 "%<-fno-range-check%>", &rhs
->where
);
10370 if (lhs
->ts
.type
== BT_CHARACTER
10371 && warn_character_truncation
)
10373 HOST_WIDE_INT llen
= 0, rlen
= 0;
10374 if (lhs
->ts
.u
.cl
!= NULL
10375 && lhs
->ts
.u
.cl
->length
!= NULL
10376 && lhs
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
)
10377 llen
= gfc_mpz_get_hwi (lhs
->ts
.u
.cl
->length
->value
.integer
);
10379 if (rhs
->expr_type
== EXPR_CONSTANT
)
10380 rlen
= rhs
->value
.character
.length
;
10382 else if (rhs
->ts
.u
.cl
!= NULL
10383 && rhs
->ts
.u
.cl
->length
!= NULL
10384 && rhs
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
)
10385 rlen
= gfc_mpz_get_hwi (rhs
->ts
.u
.cl
->length
->value
.integer
);
10387 if (rlen
&& llen
&& rlen
> llen
)
10388 gfc_warning_now (OPT_Wcharacter_truncation
,
10389 "CHARACTER expression will be truncated "
10390 "in assignment (%ld/%ld) at %L",
10391 (long) llen
, (long) rlen
, &code
->loc
);
10394 /* Ensure that a vector index expression for the lvalue is evaluated
10395 to a temporary if the lvalue symbol is referenced in it. */
10398 for (ref
= lhs
->ref
; ref
; ref
= ref
->next
)
10399 if (ref
->type
== REF_ARRAY
)
10401 for (n
= 0; n
< ref
->u
.ar
.dimen
; n
++)
10402 if (ref
->u
.ar
.dimen_type
[n
] == DIMEN_VECTOR
10403 && gfc_find_sym_in_expr (lhs
->symtree
->n
.sym
,
10404 ref
->u
.ar
.start
[n
]))
10406 = gfc_get_parentheses (ref
->u
.ar
.start
[n
]);
10410 if (gfc_pure (NULL
))
10412 if (lhs
->ts
.type
== BT_DERIVED
10413 && lhs
->expr_type
== EXPR_VARIABLE
10414 && lhs
->ts
.u
.derived
->attr
.pointer_comp
10415 && rhs
->expr_type
== EXPR_VARIABLE
10416 && (gfc_impure_variable (rhs
->symtree
->n
.sym
)
10417 || gfc_is_coindexed (rhs
)))
10419 /* F2008, C1283. */
10420 if (gfc_is_coindexed (rhs
))
10421 gfc_error ("Coindexed expression at %L is assigned to "
10422 "a derived type variable with a POINTER "
10423 "component in a PURE procedure",
10426 gfc_error ("The impure variable at %L is assigned to "
10427 "a derived type variable with a POINTER "
10428 "component in a PURE procedure (12.6)",
10433 /* Fortran 2008, C1283. */
10434 if (gfc_is_coindexed (lhs
))
10436 gfc_error ("Assignment to coindexed variable at %L in a PURE "
10437 "procedure", &rhs
->where
);
10442 if (gfc_implicit_pure (NULL
))
10444 if (lhs
->expr_type
== EXPR_VARIABLE
10445 && lhs
->symtree
->n
.sym
!= gfc_current_ns
->proc_name
10446 && lhs
->symtree
->n
.sym
->ns
!= gfc_current_ns
)
10447 gfc_unset_implicit_pure (NULL
);
10449 if (lhs
->ts
.type
== BT_DERIVED
10450 && lhs
->expr_type
== EXPR_VARIABLE
10451 && lhs
->ts
.u
.derived
->attr
.pointer_comp
10452 && rhs
->expr_type
== EXPR_VARIABLE
10453 && (gfc_impure_variable (rhs
->symtree
->n
.sym
)
10454 || gfc_is_coindexed (rhs
)))
10455 gfc_unset_implicit_pure (NULL
);
10457 /* Fortran 2008, C1283. */
10458 if (gfc_is_coindexed (lhs
))
10459 gfc_unset_implicit_pure (NULL
);
10462 /* F2008, 7.2.1.2. */
10463 attr
= gfc_expr_attr (lhs
);
10464 if (lhs
->ts
.type
== BT_CLASS
&& attr
.allocatable
)
10466 if (attr
.codimension
)
10468 gfc_error ("Assignment to polymorphic coarray at %L is not "
10469 "permitted", &lhs
->where
);
10472 if (!gfc_notify_std (GFC_STD_F2008
, "Assignment to an allocatable "
10473 "polymorphic variable at %L", &lhs
->where
))
10475 if (!flag_realloc_lhs
)
10477 gfc_error ("Assignment to an allocatable polymorphic variable at %L "
10478 "requires %<-frealloc-lhs%>", &lhs
->where
);
10482 else if (lhs
->ts
.type
== BT_CLASS
)
10484 gfc_error ("Nonallocatable variable must not be polymorphic in intrinsic "
10485 "assignment at %L - check that there is a matching specific "
10486 "subroutine for '=' operator", &lhs
->where
);
10490 bool lhs_coindexed
= gfc_is_coindexed (lhs
);
10492 /* F2008, Section 7.2.1.2. */
10493 if (lhs_coindexed
&& gfc_has_ultimate_allocatable (lhs
))
10495 gfc_error ("Coindexed variable must not have an allocatable ultimate "
10496 "component in assignment at %L", &lhs
->where
);
10500 /* Assign the 'data' of a class object to a derived type. */
10501 if (lhs
->ts
.type
== BT_DERIVED
10502 && rhs
->ts
.type
== BT_CLASS
10503 && rhs
->expr_type
!= EXPR_ARRAY
)
10504 gfc_add_data_component (rhs
);
10506 /* Make sure there is a vtable and, in particular, a _copy for the
10508 if (UNLIMITED_POLY (lhs
) && lhs
->rank
&& rhs
->ts
.type
!= BT_CLASS
)
10509 gfc_find_vtab (&rhs
->ts
);
10511 bool caf_convert_to_send
= flag_coarray
== GFC_FCOARRAY_LIB
10513 || (code
->expr2
->expr_type
== EXPR_FUNCTION
10514 && code
->expr2
->value
.function
.isym
10515 && code
->expr2
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
10516 && (code
->expr1
->rank
== 0 || code
->expr2
->rank
!= 0)
10517 && !gfc_expr_attr (rhs
).allocatable
10518 && !gfc_has_vector_subscript (rhs
)));
10520 gfc_check_assign (lhs
, rhs
, 1, !caf_convert_to_send
);
10522 /* Insert a GFC_ISYM_CAF_SEND intrinsic, when the LHS is a coindexed variable.
10523 Additionally, insert this code when the RHS is a CAF as we then use the
10524 GFC_ISYM_CAF_SEND intrinsic just to avoid a temporary; but do not do so if
10525 the LHS is (re)allocatable or has a vector subscript. If the LHS is a
10526 noncoindexed array and the RHS is a coindexed scalar, use the normal code
10528 if (caf_convert_to_send
)
10530 if (code
->expr2
->expr_type
== EXPR_FUNCTION
10531 && code
->expr2
->value
.function
.isym
10532 && code
->expr2
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
)
10533 remove_caf_get_intrinsic (code
->expr2
);
10534 code
->op
= EXEC_CALL
;
10535 gfc_get_sym_tree (GFC_PREFIX ("caf_send"), ns
, &code
->symtree
, true);
10536 code
->resolved_sym
= code
->symtree
->n
.sym
;
10537 code
->resolved_sym
->attr
.flavor
= FL_PROCEDURE
;
10538 code
->resolved_sym
->attr
.intrinsic
= 1;
10539 code
->resolved_sym
->attr
.subroutine
= 1;
10540 code
->resolved_isym
= gfc_intrinsic_subroutine_by_id (GFC_ISYM_CAF_SEND
);
10541 gfc_commit_symbol (code
->resolved_sym
);
10542 code
->ext
.actual
= gfc_get_actual_arglist ();
10543 code
->ext
.actual
->expr
= lhs
;
10544 code
->ext
.actual
->next
= gfc_get_actual_arglist ();
10545 code
->ext
.actual
->next
->expr
= rhs
;
10546 code
->expr1
= NULL
;
10547 code
->expr2
= NULL
;
10554 /* Add a component reference onto an expression. */
10557 add_comp_ref (gfc_expr
*e
, gfc_component
*c
)
10562 ref
= &((*ref
)->next
);
10563 *ref
= gfc_get_ref ();
10564 (*ref
)->type
= REF_COMPONENT
;
10565 (*ref
)->u
.c
.sym
= e
->ts
.u
.derived
;
10566 (*ref
)->u
.c
.component
= c
;
10569 /* Add a full array ref, as necessary. */
10572 gfc_add_full_array_ref (e
, c
->as
);
10573 e
->rank
= c
->as
->rank
;
10578 /* Build an assignment. Keep the argument 'op' for future use, so that
10579 pointer assignments can be made. */
10582 build_assignment (gfc_exec_op op
, gfc_expr
*expr1
, gfc_expr
*expr2
,
10583 gfc_component
*comp1
, gfc_component
*comp2
, locus loc
)
10585 gfc_code
*this_code
;
10587 this_code
= gfc_get_code (op
);
10588 this_code
->next
= NULL
;
10589 this_code
->expr1
= gfc_copy_expr (expr1
);
10590 this_code
->expr2
= gfc_copy_expr (expr2
);
10591 this_code
->loc
= loc
;
10592 if (comp1
&& comp2
)
10594 add_comp_ref (this_code
->expr1
, comp1
);
10595 add_comp_ref (this_code
->expr2
, comp2
);
10602 /* Makes a temporary variable expression based on the characteristics of
10603 a given variable expression. */
10606 get_temp_from_expr (gfc_expr
*e
, gfc_namespace
*ns
)
10608 static int serial
= 0;
10609 char name
[GFC_MAX_SYMBOL_LEN
];
10611 gfc_array_spec
*as
;
10612 gfc_array_ref
*aref
;
10615 sprintf (name
, GFC_PREFIX("DA%d"), serial
++);
10616 gfc_get_sym_tree (name
, ns
, &tmp
, false);
10617 gfc_add_type (tmp
->n
.sym
, &e
->ts
, NULL
);
10623 /* Obtain the arrayspec for the temporary. */
10624 if (e
->rank
&& e
->expr_type
!= EXPR_ARRAY
10625 && e
->expr_type
!= EXPR_FUNCTION
10626 && e
->expr_type
!= EXPR_OP
)
10628 aref
= gfc_find_array_ref (e
);
10629 if (e
->expr_type
== EXPR_VARIABLE
10630 && e
->symtree
->n
.sym
->as
== aref
->as
)
10634 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
10635 if (ref
->type
== REF_COMPONENT
10636 && ref
->u
.c
.component
->as
== aref
->as
)
10644 /* Add the attributes and the arrayspec to the temporary. */
10645 tmp
->n
.sym
->attr
= gfc_expr_attr (e
);
10646 tmp
->n
.sym
->attr
.function
= 0;
10647 tmp
->n
.sym
->attr
.result
= 0;
10648 tmp
->n
.sym
->attr
.flavor
= FL_VARIABLE
;
10649 tmp
->n
.sym
->attr
.dummy
= 0;
10650 tmp
->n
.sym
->attr
.intent
= INTENT_UNKNOWN
;
10654 tmp
->n
.sym
->as
= gfc_copy_array_spec (as
);
10657 if (as
->type
== AS_DEFERRED
)
10658 tmp
->n
.sym
->attr
.allocatable
= 1;
10660 else if (e
->rank
&& (e
->expr_type
== EXPR_ARRAY
10661 || e
->expr_type
== EXPR_FUNCTION
10662 || e
->expr_type
== EXPR_OP
))
10664 tmp
->n
.sym
->as
= gfc_get_array_spec ();
10665 tmp
->n
.sym
->as
->type
= AS_DEFERRED
;
10666 tmp
->n
.sym
->as
->rank
= e
->rank
;
10667 tmp
->n
.sym
->attr
.allocatable
= 1;
10668 tmp
->n
.sym
->attr
.dimension
= 1;
10671 tmp
->n
.sym
->attr
.dimension
= 0;
10673 gfc_set_sym_referenced (tmp
->n
.sym
);
10674 gfc_commit_symbol (tmp
->n
.sym
);
10675 e
= gfc_lval_expr_from_sym (tmp
->n
.sym
);
10677 /* Should the lhs be a section, use its array ref for the
10678 temporary expression. */
10679 if (aref
&& aref
->type
!= AR_FULL
)
10681 gfc_free_ref_list (e
->ref
);
10682 e
->ref
= gfc_copy_ref (ref
);
10688 /* Add one line of code to the code chain, making sure that 'head' and
10689 'tail' are appropriately updated. */
10692 add_code_to_chain (gfc_code
**this_code
, gfc_code
**head
, gfc_code
**tail
)
10694 gcc_assert (this_code
);
10696 *head
= *tail
= *this_code
;
10698 *tail
= gfc_append_code (*tail
, *this_code
);
10703 /* Counts the potential number of part array references that would
10704 result from resolution of typebound defined assignments. */
10707 nonscalar_typebound_assign (gfc_symbol
*derived
, int depth
)
10710 int c_depth
= 0, t_depth
;
10712 for (c
= derived
->components
; c
; c
= c
->next
)
10714 if ((!gfc_bt_struct (c
->ts
.type
)
10716 || c
->attr
.allocatable
10717 || c
->attr
.proc_pointer_comp
10718 || c
->attr
.class_pointer
10719 || c
->attr
.proc_pointer
)
10720 && !c
->attr
.defined_assign_comp
)
10723 if (c
->as
&& c_depth
== 0)
10726 if (c
->ts
.u
.derived
->attr
.defined_assign_comp
)
10727 t_depth
= nonscalar_typebound_assign (c
->ts
.u
.derived
,
10732 c_depth
= t_depth
> c_depth
? t_depth
: c_depth
;
10734 return depth
+ c_depth
;
10738 /* Implement 7.2.1.3 of the F08 standard:
10739 "An intrinsic assignment where the variable is of derived type is
10740 performed as if each component of the variable were assigned from the
10741 corresponding component of expr using pointer assignment (7.2.2) for
10742 each pointer component, defined assignment for each nonpointer
10743 nonallocatable component of a type that has a type-bound defined
10744 assignment consistent with the component, intrinsic assignment for
10745 each other nonpointer nonallocatable component, ..."
10747 The pointer assignments are taken care of by the intrinsic
10748 assignment of the structure itself. This function recursively adds
10749 defined assignments where required. The recursion is accomplished
10750 by calling gfc_resolve_code.
10752 When the lhs in a defined assignment has intent INOUT, we need a
10753 temporary for the lhs. In pseudo-code:
10755 ! Only call function lhs once.
10756 if (lhs is not a constant or an variable)
10759 ! Do the intrinsic assignment
10761 ! Now do the defined assignments
10762 do over components with typebound defined assignment [%cmp]
10763 #if one component's assignment procedure is INOUT
10765 #if expr2 non-variable
10771 t1%cmp {defined=} expr2%cmp
10777 expr1%cmp {defined=} expr2%cmp
10781 /* The temporary assignments have to be put on top of the additional
10782 code to avoid the result being changed by the intrinsic assignment.
10784 static int component_assignment_level
= 0;
10785 static gfc_code
*tmp_head
= NULL
, *tmp_tail
= NULL
;
10788 generate_component_assignments (gfc_code
**code
, gfc_namespace
*ns
)
10790 gfc_component
*comp1
, *comp2
;
10791 gfc_code
*this_code
= NULL
, *head
= NULL
, *tail
= NULL
;
10793 int error_count
, depth
;
10795 gfc_get_errors (NULL
, &error_count
);
10797 /* Filter out continuing processing after an error. */
10799 || (*code
)->expr1
->ts
.type
!= BT_DERIVED
10800 || (*code
)->expr2
->ts
.type
!= BT_DERIVED
)
10803 /* TODO: Handle more than one part array reference in assignments. */
10804 depth
= nonscalar_typebound_assign ((*code
)->expr1
->ts
.u
.derived
,
10805 (*code
)->expr1
->rank
? 1 : 0);
10808 gfc_warning (0, "TODO: type-bound defined assignment(s) at %L not "
10809 "done because multiple part array references would "
10810 "occur in intermediate expressions.", &(*code
)->loc
);
10814 component_assignment_level
++;
10816 /* Create a temporary so that functions get called only once. */
10817 if ((*code
)->expr2
->expr_type
!= EXPR_VARIABLE
10818 && (*code
)->expr2
->expr_type
!= EXPR_CONSTANT
)
10820 gfc_expr
*tmp_expr
;
10822 /* Assign the rhs to the temporary. */
10823 tmp_expr
= get_temp_from_expr ((*code
)->expr1
, ns
);
10824 this_code
= build_assignment (EXEC_ASSIGN
,
10825 tmp_expr
, (*code
)->expr2
,
10826 NULL
, NULL
, (*code
)->loc
);
10827 /* Add the code and substitute the rhs expression. */
10828 add_code_to_chain (&this_code
, &tmp_head
, &tmp_tail
);
10829 gfc_free_expr ((*code
)->expr2
);
10830 (*code
)->expr2
= tmp_expr
;
10833 /* Do the intrinsic assignment. This is not needed if the lhs is one
10834 of the temporaries generated here, since the intrinsic assignment
10835 to the final result already does this. */
10836 if ((*code
)->expr1
->symtree
->n
.sym
->name
[2] != '@')
10838 this_code
= build_assignment (EXEC_ASSIGN
,
10839 (*code
)->expr1
, (*code
)->expr2
,
10840 NULL
, NULL
, (*code
)->loc
);
10841 add_code_to_chain (&this_code
, &head
, &tail
);
10844 comp1
= (*code
)->expr1
->ts
.u
.derived
->components
;
10845 comp2
= (*code
)->expr2
->ts
.u
.derived
->components
;
10848 for (; comp1
; comp1
= comp1
->next
, comp2
= comp2
->next
)
10850 bool inout
= false;
10852 /* The intrinsic assignment does the right thing for pointers
10853 of all kinds and allocatable components. */
10854 if (!gfc_bt_struct (comp1
->ts
.type
)
10855 || comp1
->attr
.pointer
10856 || comp1
->attr
.allocatable
10857 || comp1
->attr
.proc_pointer_comp
10858 || comp1
->attr
.class_pointer
10859 || comp1
->attr
.proc_pointer
)
10862 /* Make an assigment for this component. */
10863 this_code
= build_assignment (EXEC_ASSIGN
,
10864 (*code
)->expr1
, (*code
)->expr2
,
10865 comp1
, comp2
, (*code
)->loc
);
10867 /* Convert the assignment if there is a defined assignment for
10868 this type. Otherwise, using the call from gfc_resolve_code,
10869 recurse into its components. */
10870 gfc_resolve_code (this_code
, ns
);
10872 if (this_code
->op
== EXEC_ASSIGN_CALL
)
10874 gfc_formal_arglist
*dummy_args
;
10876 /* Check that there is a typebound defined assignment. If not,
10877 then this must be a module defined assignment. We cannot
10878 use the defined_assign_comp attribute here because it must
10879 be this derived type that has the defined assignment and not
10881 if (!(comp1
->ts
.u
.derived
->f2k_derived
10882 && comp1
->ts
.u
.derived
->f2k_derived
10883 ->tb_op
[INTRINSIC_ASSIGN
]))
10885 gfc_free_statements (this_code
);
10890 /* If the first argument of the subroutine has intent INOUT
10891 a temporary must be generated and used instead. */
10892 rsym
= this_code
->resolved_sym
;
10893 dummy_args
= gfc_sym_get_dummy_args (rsym
);
10895 && dummy_args
->sym
->attr
.intent
== INTENT_INOUT
)
10897 gfc_code
*temp_code
;
10900 /* Build the temporary required for the assignment and put
10901 it at the head of the generated code. */
10904 t1
= get_temp_from_expr ((*code
)->expr1
, ns
);
10905 temp_code
= build_assignment (EXEC_ASSIGN
,
10906 t1
, (*code
)->expr1
,
10907 NULL
, NULL
, (*code
)->loc
);
10909 /* For allocatable LHS, check whether it is allocated. Note
10910 that allocatable components with defined assignment are
10911 not yet support. See PR 57696. */
10912 if ((*code
)->expr1
->symtree
->n
.sym
->attr
.allocatable
)
10916 gfc_lval_expr_from_sym ((*code
)->expr1
->symtree
->n
.sym
);
10917 block
= gfc_get_code (EXEC_IF
);
10918 block
->block
= gfc_get_code (EXEC_IF
);
10919 block
->block
->expr1
10920 = gfc_build_intrinsic_call (ns
,
10921 GFC_ISYM_ALLOCATED
, "allocated",
10922 (*code
)->loc
, 1, e
);
10923 block
->block
->next
= temp_code
;
10926 add_code_to_chain (&temp_code
, &tmp_head
, &tmp_tail
);
10929 /* Replace the first actual arg with the component of the
10931 gfc_free_expr (this_code
->ext
.actual
->expr
);
10932 this_code
->ext
.actual
->expr
= gfc_copy_expr (t1
);
10933 add_comp_ref (this_code
->ext
.actual
->expr
, comp1
);
10935 /* If the LHS variable is allocatable and wasn't allocated and
10936 the temporary is allocatable, pointer assign the address of
10937 the freshly allocated LHS to the temporary. */
10938 if ((*code
)->expr1
->symtree
->n
.sym
->attr
.allocatable
10939 && gfc_expr_attr ((*code
)->expr1
).allocatable
)
10944 cond
= gfc_get_expr ();
10945 cond
->ts
.type
= BT_LOGICAL
;
10946 cond
->ts
.kind
= gfc_default_logical_kind
;
10947 cond
->expr_type
= EXPR_OP
;
10948 cond
->where
= (*code
)->loc
;
10949 cond
->value
.op
.op
= INTRINSIC_NOT
;
10950 cond
->value
.op
.op1
= gfc_build_intrinsic_call (ns
,
10951 GFC_ISYM_ALLOCATED
, "allocated",
10952 (*code
)->loc
, 1, gfc_copy_expr (t1
));
10953 block
= gfc_get_code (EXEC_IF
);
10954 block
->block
= gfc_get_code (EXEC_IF
);
10955 block
->block
->expr1
= cond
;
10956 block
->block
->next
= build_assignment (EXEC_POINTER_ASSIGN
,
10957 t1
, (*code
)->expr1
,
10958 NULL
, NULL
, (*code
)->loc
);
10959 add_code_to_chain (&block
, &head
, &tail
);
10963 else if (this_code
->op
== EXEC_ASSIGN
&& !this_code
->next
)
10965 /* Don't add intrinsic assignments since they are already
10966 effected by the intrinsic assignment of the structure. */
10967 gfc_free_statements (this_code
);
10972 add_code_to_chain (&this_code
, &head
, &tail
);
10976 /* Transfer the value to the final result. */
10977 this_code
= build_assignment (EXEC_ASSIGN
,
10978 (*code
)->expr1
, t1
,
10979 comp1
, comp2
, (*code
)->loc
);
10980 add_code_to_chain (&this_code
, &head
, &tail
);
10984 /* Put the temporary assignments at the top of the generated code. */
10985 if (tmp_head
&& component_assignment_level
== 1)
10987 gfc_append_code (tmp_head
, head
);
10989 tmp_head
= tmp_tail
= NULL
;
10992 // If we did a pointer assignment - thus, we need to ensure that the LHS is
10993 // not accidentally deallocated. Hence, nullify t1.
10994 if (t1
&& (*code
)->expr1
->symtree
->n
.sym
->attr
.allocatable
10995 && gfc_expr_attr ((*code
)->expr1
).allocatable
)
11001 e
= gfc_lval_expr_from_sym ((*code
)->expr1
->symtree
->n
.sym
);
11002 cond
= gfc_build_intrinsic_call (ns
, GFC_ISYM_ASSOCIATED
, "associated",
11003 (*code
)->loc
, 2, gfc_copy_expr (t1
), e
);
11004 block
= gfc_get_code (EXEC_IF
);
11005 block
->block
= gfc_get_code (EXEC_IF
);
11006 block
->block
->expr1
= cond
;
11007 block
->block
->next
= build_assignment (EXEC_POINTER_ASSIGN
,
11008 t1
, gfc_get_null_expr (&(*code
)->loc
),
11009 NULL
, NULL
, (*code
)->loc
);
11010 gfc_append_code (tail
, block
);
11014 /* Now attach the remaining code chain to the input code. Step on
11015 to the end of the new code since resolution is complete. */
11016 gcc_assert ((*code
)->op
== EXEC_ASSIGN
);
11017 tail
->next
= (*code
)->next
;
11018 /* Overwrite 'code' because this would place the intrinsic assignment
11019 before the temporary for the lhs is created. */
11020 gfc_free_expr ((*code
)->expr1
);
11021 gfc_free_expr ((*code
)->expr2
);
11027 component_assignment_level
--;
11031 /* F2008: Pointer function assignments are of the form:
11032 ptr_fcn (args) = expr
11033 This function breaks these assignments into two statements:
11034 temporary_pointer => ptr_fcn(args)
11035 temporary_pointer = expr */
11038 resolve_ptr_fcn_assign (gfc_code
**code
, gfc_namespace
*ns
)
11040 gfc_expr
*tmp_ptr_expr
;
11041 gfc_code
*this_code
;
11042 gfc_component
*comp
;
11045 if ((*code
)->expr1
->expr_type
!= EXPR_FUNCTION
)
11048 /* Even if standard does not support this feature, continue to build
11049 the two statements to avoid upsetting frontend_passes.c. */
11050 gfc_notify_std (GFC_STD_F2008
, "Pointer procedure assignment at "
11051 "%L", &(*code
)->loc
);
11053 comp
= gfc_get_proc_ptr_comp ((*code
)->expr1
);
11056 s
= comp
->ts
.interface
;
11058 s
= (*code
)->expr1
->symtree
->n
.sym
;
11060 if (s
== NULL
|| !s
->result
->attr
.pointer
)
11062 gfc_error ("The function result on the lhs of the assignment at "
11063 "%L must have the pointer attribute.",
11064 &(*code
)->expr1
->where
);
11065 (*code
)->op
= EXEC_NOP
;
11069 tmp_ptr_expr
= get_temp_from_expr ((*code
)->expr2
, ns
);
11071 /* get_temp_from_expression is set up for ordinary assignments. To that
11072 end, where array bounds are not known, arrays are made allocatable.
11073 Change the temporary to a pointer here. */
11074 tmp_ptr_expr
->symtree
->n
.sym
->attr
.pointer
= 1;
11075 tmp_ptr_expr
->symtree
->n
.sym
->attr
.allocatable
= 0;
11076 tmp_ptr_expr
->where
= (*code
)->loc
;
11078 this_code
= build_assignment (EXEC_ASSIGN
,
11079 tmp_ptr_expr
, (*code
)->expr2
,
11080 NULL
, NULL
, (*code
)->loc
);
11081 this_code
->next
= (*code
)->next
;
11082 (*code
)->next
= this_code
;
11083 (*code
)->op
= EXEC_POINTER_ASSIGN
;
11084 (*code
)->expr2
= (*code
)->expr1
;
11085 (*code
)->expr1
= tmp_ptr_expr
;
11091 /* Deferred character length assignments from an operator expression
11092 require a temporary because the character length of the lhs can
11093 change in the course of the assignment. */
11096 deferred_op_assign (gfc_code
**code
, gfc_namespace
*ns
)
11098 gfc_expr
*tmp_expr
;
11099 gfc_code
*this_code
;
11101 if (!((*code
)->expr1
->ts
.type
== BT_CHARACTER
11102 && (*code
)->expr1
->ts
.deferred
&& (*code
)->expr1
->rank
11103 && (*code
)->expr2
->expr_type
== EXPR_OP
))
11106 if (!gfc_check_dependency ((*code
)->expr1
, (*code
)->expr2
, 1))
11109 tmp_expr
= get_temp_from_expr ((*code
)->expr1
, ns
);
11110 tmp_expr
->where
= (*code
)->loc
;
11112 /* A new charlen is required to ensure that the variable string
11113 length is different to that of the original lhs. */
11114 tmp_expr
->ts
.u
.cl
= gfc_get_charlen();
11115 tmp_expr
->symtree
->n
.sym
->ts
.u
.cl
= tmp_expr
->ts
.u
.cl
;
11116 tmp_expr
->ts
.u
.cl
->next
= (*code
)->expr2
->ts
.u
.cl
->next
;
11117 (*code
)->expr2
->ts
.u
.cl
->next
= tmp_expr
->ts
.u
.cl
;
11119 tmp_expr
->symtree
->n
.sym
->ts
.deferred
= 1;
11121 this_code
= build_assignment (EXEC_ASSIGN
,
11123 gfc_copy_expr (tmp_expr
),
11124 NULL
, NULL
, (*code
)->loc
);
11126 (*code
)->expr1
= tmp_expr
;
11128 this_code
->next
= (*code
)->next
;
11129 (*code
)->next
= this_code
;
11135 /* Given a block of code, recursively resolve everything pointed to by this
11139 gfc_resolve_code (gfc_code
*code
, gfc_namespace
*ns
)
11141 int omp_workshare_save
;
11142 int forall_save
, do_concurrent_save
;
11146 frame
.prev
= cs_base
;
11150 find_reachable_labels (code
);
11152 for (; code
; code
= code
->next
)
11154 frame
.current
= code
;
11155 forall_save
= forall_flag
;
11156 do_concurrent_save
= gfc_do_concurrent_flag
;
11158 if (code
->op
== EXEC_FORALL
)
11161 gfc_resolve_forall (code
, ns
, forall_save
);
11164 else if (code
->block
)
11166 omp_workshare_save
= -1;
11169 case EXEC_OACC_PARALLEL_LOOP
:
11170 case EXEC_OACC_PARALLEL
:
11171 case EXEC_OACC_KERNELS_LOOP
:
11172 case EXEC_OACC_KERNELS
:
11173 case EXEC_OACC_DATA
:
11174 case EXEC_OACC_HOST_DATA
:
11175 case EXEC_OACC_LOOP
:
11176 gfc_resolve_oacc_blocks (code
, ns
);
11178 case EXEC_OMP_PARALLEL_WORKSHARE
:
11179 omp_workshare_save
= omp_workshare_flag
;
11180 omp_workshare_flag
= 1;
11181 gfc_resolve_omp_parallel_blocks (code
, ns
);
11183 case EXEC_OMP_PARALLEL
:
11184 case EXEC_OMP_PARALLEL_DO
:
11185 case EXEC_OMP_PARALLEL_DO_SIMD
:
11186 case EXEC_OMP_PARALLEL_SECTIONS
:
11187 case EXEC_OMP_TARGET_PARALLEL
:
11188 case EXEC_OMP_TARGET_PARALLEL_DO
:
11189 case EXEC_OMP_TARGET_PARALLEL_DO_SIMD
:
11190 case EXEC_OMP_TARGET_TEAMS
:
11191 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE
:
11192 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO
:
11193 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
11194 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_SIMD
:
11195 case EXEC_OMP_TASK
:
11196 case EXEC_OMP_TASKLOOP
:
11197 case EXEC_OMP_TASKLOOP_SIMD
:
11198 case EXEC_OMP_TEAMS
:
11199 case EXEC_OMP_TEAMS_DISTRIBUTE
:
11200 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO
:
11201 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
11202 case EXEC_OMP_TEAMS_DISTRIBUTE_SIMD
:
11203 omp_workshare_save
= omp_workshare_flag
;
11204 omp_workshare_flag
= 0;
11205 gfc_resolve_omp_parallel_blocks (code
, ns
);
11207 case EXEC_OMP_DISTRIBUTE
:
11208 case EXEC_OMP_DISTRIBUTE_SIMD
:
11210 case EXEC_OMP_DO_SIMD
:
11211 case EXEC_OMP_SIMD
:
11212 case EXEC_OMP_TARGET_SIMD
:
11213 gfc_resolve_omp_do_blocks (code
, ns
);
11215 case EXEC_SELECT_TYPE
:
11216 /* Blocks are handled in resolve_select_type because we have
11217 to transform the SELECT TYPE into ASSOCIATE first. */
11219 case EXEC_DO_CONCURRENT
:
11220 gfc_do_concurrent_flag
= 1;
11221 gfc_resolve_blocks (code
->block
, ns
);
11222 gfc_do_concurrent_flag
= 2;
11224 case EXEC_OMP_WORKSHARE
:
11225 omp_workshare_save
= omp_workshare_flag
;
11226 omp_workshare_flag
= 1;
11229 gfc_resolve_blocks (code
->block
, ns
);
11233 if (omp_workshare_save
!= -1)
11234 omp_workshare_flag
= omp_workshare_save
;
11238 if (code
->op
!= EXEC_COMPCALL
&& code
->op
!= EXEC_CALL_PPC
)
11239 t
= gfc_resolve_expr (code
->expr1
);
11240 forall_flag
= forall_save
;
11241 gfc_do_concurrent_flag
= do_concurrent_save
;
11243 if (!gfc_resolve_expr (code
->expr2
))
11246 if (code
->op
== EXEC_ALLOCATE
11247 && !gfc_resolve_expr (code
->expr3
))
11253 case EXEC_END_BLOCK
:
11254 case EXEC_END_NESTED_BLOCK
:
11258 case EXEC_ERROR_STOP
:
11260 case EXEC_CONTINUE
:
11262 case EXEC_ASSIGN_CALL
:
11265 case EXEC_CRITICAL
:
11266 resolve_critical (code
);
11269 case EXEC_SYNC_ALL
:
11270 case EXEC_SYNC_IMAGES
:
11271 case EXEC_SYNC_MEMORY
:
11272 resolve_sync (code
);
11277 case EXEC_EVENT_POST
:
11278 case EXEC_EVENT_WAIT
:
11279 resolve_lock_unlock_event (code
);
11282 case EXEC_FAIL_IMAGE
:
11283 case EXEC_FORM_TEAM
:
11284 case EXEC_CHANGE_TEAM
:
11285 case EXEC_END_TEAM
:
11286 case EXEC_SYNC_TEAM
:
11290 /* Keep track of which entry we are up to. */
11291 current_entry_id
= code
->ext
.entry
->id
;
11295 resolve_where (code
, NULL
);
11299 if (code
->expr1
!= NULL
)
11301 if (code
->expr1
->ts
.type
!= BT_INTEGER
)
11302 gfc_error ("ASSIGNED GOTO statement at %L requires an "
11303 "INTEGER variable", &code
->expr1
->where
);
11304 else if (code
->expr1
->symtree
->n
.sym
->attr
.assign
!= 1)
11305 gfc_error ("Variable %qs has not been assigned a target "
11306 "label at %L", code
->expr1
->symtree
->n
.sym
->name
,
11307 &code
->expr1
->where
);
11310 resolve_branch (code
->label1
, code
);
11314 if (code
->expr1
!= NULL
11315 && (code
->expr1
->ts
.type
!= BT_INTEGER
|| code
->expr1
->rank
))
11316 gfc_error ("Alternate RETURN statement at %L requires a SCALAR-"
11317 "INTEGER return specifier", &code
->expr1
->where
);
11320 case EXEC_INIT_ASSIGN
:
11321 case EXEC_END_PROCEDURE
:
11328 /* Remove a GFC_ISYM_CAF_GET inserted for a coindexed variable on
11330 if (code
->expr1
->expr_type
== EXPR_FUNCTION
11331 && code
->expr1
->value
.function
.isym
11332 && code
->expr1
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
)
11333 remove_caf_get_intrinsic (code
->expr1
);
11335 /* If this is a pointer function in an lvalue variable context,
11336 the new code will have to be resolved afresh. This is also the
11337 case with an error, where the code is transformed into NOP to
11338 prevent ICEs downstream. */
11339 if (resolve_ptr_fcn_assign (&code
, ns
)
11340 || code
->op
== EXEC_NOP
)
11343 if (!gfc_check_vardef_context (code
->expr1
, false, false, false,
11347 if (resolve_ordinary_assign (code
, ns
))
11349 if (code
->op
== EXEC_COMPCALL
)
11355 /* Check for dependencies in deferred character length array
11356 assignments and generate a temporary, if necessary. */
11357 if (code
->op
== EXEC_ASSIGN
&& deferred_op_assign (&code
, ns
))
11360 /* F03 7.4.1.3 for non-allocatable, non-pointer components. */
11361 if (code
->op
!= EXEC_CALL
&& code
->expr1
->ts
.type
== BT_DERIVED
11362 && code
->expr1
->ts
.u
.derived
11363 && code
->expr1
->ts
.u
.derived
->attr
.defined_assign_comp
)
11364 generate_component_assignments (&code
, ns
);
11368 case EXEC_LABEL_ASSIGN
:
11369 if (code
->label1
->defined
== ST_LABEL_UNKNOWN
)
11370 gfc_error ("Label %d referenced at %L is never defined",
11371 code
->label1
->value
, &code
->label1
->where
);
11373 && (code
->expr1
->expr_type
!= EXPR_VARIABLE
11374 || code
->expr1
->symtree
->n
.sym
->ts
.type
!= BT_INTEGER
11375 || code
->expr1
->symtree
->n
.sym
->ts
.kind
11376 != gfc_default_integer_kind
11377 || code
->expr1
->symtree
->n
.sym
->as
!= NULL
))
11378 gfc_error ("ASSIGN statement at %L requires a scalar "
11379 "default INTEGER variable", &code
->expr1
->where
);
11382 case EXEC_POINTER_ASSIGN
:
11389 /* This is both a variable definition and pointer assignment
11390 context, so check both of them. For rank remapping, a final
11391 array ref may be present on the LHS and fool gfc_expr_attr
11392 used in gfc_check_vardef_context. Remove it. */
11393 e
= remove_last_array_ref (code
->expr1
);
11394 t
= gfc_check_vardef_context (e
, true, false, false,
11395 _("pointer assignment"));
11397 t
= gfc_check_vardef_context (e
, false, false, false,
11398 _("pointer assignment"));
11403 gfc_check_pointer_assign (code
->expr1
, code
->expr2
);
11405 /* Assigning a class object always is a regular assign. */
11406 if (code
->expr2
->ts
.type
== BT_CLASS
11407 && code
->expr1
->ts
.type
== BT_CLASS
11408 && !CLASS_DATA (code
->expr2
)->attr
.dimension
11409 && !(gfc_expr_attr (code
->expr1
).proc_pointer
11410 && code
->expr2
->expr_type
== EXPR_VARIABLE
11411 && code
->expr2
->symtree
->n
.sym
->attr
.flavor
11413 code
->op
= EXEC_ASSIGN
;
11417 case EXEC_ARITHMETIC_IF
:
11419 gfc_expr
*e
= code
->expr1
;
11421 gfc_resolve_expr (e
);
11422 if (e
->expr_type
== EXPR_NULL
)
11423 gfc_error ("Invalid NULL at %L", &e
->where
);
11425 if (t
&& (e
->rank
> 0
11426 || !(e
->ts
.type
== BT_REAL
|| e
->ts
.type
== BT_INTEGER
)))
11427 gfc_error ("Arithmetic IF statement at %L requires a scalar "
11428 "REAL or INTEGER expression", &e
->where
);
11430 resolve_branch (code
->label1
, code
);
11431 resolve_branch (code
->label2
, code
);
11432 resolve_branch (code
->label3
, code
);
11437 if (t
&& code
->expr1
!= NULL
11438 && (code
->expr1
->ts
.type
!= BT_LOGICAL
11439 || code
->expr1
->rank
!= 0))
11440 gfc_error ("IF clause at %L requires a scalar LOGICAL expression",
11441 &code
->expr1
->where
);
11446 resolve_call (code
);
11449 case EXEC_COMPCALL
:
11451 resolve_typebound_subroutine (code
);
11454 case EXEC_CALL_PPC
:
11455 resolve_ppc_call (code
);
11459 /* Select is complicated. Also, a SELECT construct could be
11460 a transformed computed GOTO. */
11461 resolve_select (code
, false);
11464 case EXEC_SELECT_TYPE
:
11465 resolve_select_type (code
, ns
);
11469 resolve_block_construct (code
);
11473 if (code
->ext
.iterator
!= NULL
)
11475 gfc_iterator
*iter
= code
->ext
.iterator
;
11476 if (gfc_resolve_iterator (iter
, true, false))
11477 gfc_resolve_do_iterator (code
, iter
->var
->symtree
->n
.sym
,
11482 case EXEC_DO_WHILE
:
11483 if (code
->expr1
== NULL
)
11484 gfc_internal_error ("gfc_resolve_code(): No expression on "
11487 && (code
->expr1
->rank
!= 0
11488 || code
->expr1
->ts
.type
!= BT_LOGICAL
))
11489 gfc_error ("Exit condition of DO WHILE loop at %L must be "
11490 "a scalar LOGICAL expression", &code
->expr1
->where
);
11493 case EXEC_ALLOCATE
:
11495 resolve_allocate_deallocate (code
, "ALLOCATE");
11499 case EXEC_DEALLOCATE
:
11501 resolve_allocate_deallocate (code
, "DEALLOCATE");
11506 if (!gfc_resolve_open (code
->ext
.open
))
11509 resolve_branch (code
->ext
.open
->err
, code
);
11513 if (!gfc_resolve_close (code
->ext
.close
))
11516 resolve_branch (code
->ext
.close
->err
, code
);
11519 case EXEC_BACKSPACE
:
11523 if (!gfc_resolve_filepos (code
->ext
.filepos
))
11526 resolve_branch (code
->ext
.filepos
->err
, code
);
11530 if (!gfc_resolve_inquire (code
->ext
.inquire
))
11533 resolve_branch (code
->ext
.inquire
->err
, code
);
11536 case EXEC_IOLENGTH
:
11537 gcc_assert (code
->ext
.inquire
!= NULL
);
11538 if (!gfc_resolve_inquire (code
->ext
.inquire
))
11541 resolve_branch (code
->ext
.inquire
->err
, code
);
11545 if (!gfc_resolve_wait (code
->ext
.wait
))
11548 resolve_branch (code
->ext
.wait
->err
, code
);
11549 resolve_branch (code
->ext
.wait
->end
, code
);
11550 resolve_branch (code
->ext
.wait
->eor
, code
);
11555 if (!gfc_resolve_dt (code
->ext
.dt
, &code
->loc
))
11558 resolve_branch (code
->ext
.dt
->err
, code
);
11559 resolve_branch (code
->ext
.dt
->end
, code
);
11560 resolve_branch (code
->ext
.dt
->eor
, code
);
11563 case EXEC_TRANSFER
:
11564 resolve_transfer (code
);
11567 case EXEC_DO_CONCURRENT
:
11569 resolve_forall_iterators (code
->ext
.forall_iterator
);
11571 if (code
->expr1
!= NULL
11572 && (code
->expr1
->ts
.type
!= BT_LOGICAL
|| code
->expr1
->rank
))
11573 gfc_error ("FORALL mask clause at %L requires a scalar LOGICAL "
11574 "expression", &code
->expr1
->where
);
11577 case EXEC_OACC_PARALLEL_LOOP
:
11578 case EXEC_OACC_PARALLEL
:
11579 case EXEC_OACC_KERNELS_LOOP
:
11580 case EXEC_OACC_KERNELS
:
11581 case EXEC_OACC_DATA
:
11582 case EXEC_OACC_HOST_DATA
:
11583 case EXEC_OACC_LOOP
:
11584 case EXEC_OACC_UPDATE
:
11585 case EXEC_OACC_WAIT
:
11586 case EXEC_OACC_CACHE
:
11587 case EXEC_OACC_ENTER_DATA
:
11588 case EXEC_OACC_EXIT_DATA
:
11589 case EXEC_OACC_ATOMIC
:
11590 case EXEC_OACC_DECLARE
:
11591 gfc_resolve_oacc_directive (code
, ns
);
11594 case EXEC_OMP_ATOMIC
:
11595 case EXEC_OMP_BARRIER
:
11596 case EXEC_OMP_CANCEL
:
11597 case EXEC_OMP_CANCELLATION_POINT
:
11598 case EXEC_OMP_CRITICAL
:
11599 case EXEC_OMP_FLUSH
:
11600 case EXEC_OMP_DISTRIBUTE
:
11601 case EXEC_OMP_DISTRIBUTE_PARALLEL_DO
:
11602 case EXEC_OMP_DISTRIBUTE_PARALLEL_DO_SIMD
:
11603 case EXEC_OMP_DISTRIBUTE_SIMD
:
11605 case EXEC_OMP_DO_SIMD
:
11606 case EXEC_OMP_MASTER
:
11607 case EXEC_OMP_ORDERED
:
11608 case EXEC_OMP_SECTIONS
:
11609 case EXEC_OMP_SIMD
:
11610 case EXEC_OMP_SINGLE
:
11611 case EXEC_OMP_TARGET
:
11612 case EXEC_OMP_TARGET_DATA
:
11613 case EXEC_OMP_TARGET_ENTER_DATA
:
11614 case EXEC_OMP_TARGET_EXIT_DATA
:
11615 case EXEC_OMP_TARGET_PARALLEL
:
11616 case EXEC_OMP_TARGET_PARALLEL_DO
:
11617 case EXEC_OMP_TARGET_PARALLEL_DO_SIMD
:
11618 case EXEC_OMP_TARGET_SIMD
:
11619 case EXEC_OMP_TARGET_TEAMS
:
11620 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE
:
11621 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO
:
11622 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
11623 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_SIMD
:
11624 case EXEC_OMP_TARGET_UPDATE
:
11625 case EXEC_OMP_TASK
:
11626 case EXEC_OMP_TASKGROUP
:
11627 case EXEC_OMP_TASKLOOP
:
11628 case EXEC_OMP_TASKLOOP_SIMD
:
11629 case EXEC_OMP_TASKWAIT
:
11630 case EXEC_OMP_TASKYIELD
:
11631 case EXEC_OMP_TEAMS
:
11632 case EXEC_OMP_TEAMS_DISTRIBUTE
:
11633 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO
:
11634 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
11635 case EXEC_OMP_TEAMS_DISTRIBUTE_SIMD
:
11636 case EXEC_OMP_WORKSHARE
:
11637 gfc_resolve_omp_directive (code
, ns
);
11640 case EXEC_OMP_PARALLEL
:
11641 case EXEC_OMP_PARALLEL_DO
:
11642 case EXEC_OMP_PARALLEL_DO_SIMD
:
11643 case EXEC_OMP_PARALLEL_SECTIONS
:
11644 case EXEC_OMP_PARALLEL_WORKSHARE
:
11645 omp_workshare_save
= omp_workshare_flag
;
11646 omp_workshare_flag
= 0;
11647 gfc_resolve_omp_directive (code
, ns
);
11648 omp_workshare_flag
= omp_workshare_save
;
11652 gfc_internal_error ("gfc_resolve_code(): Bad statement code");
11656 cs_base
= frame
.prev
;
11660 /* Resolve initial values and make sure they are compatible with
11664 resolve_values (gfc_symbol
*sym
)
11668 if (sym
->value
== NULL
)
11671 if (sym
->value
->expr_type
== EXPR_STRUCTURE
)
11672 t
= resolve_structure_cons (sym
->value
, 1);
11674 t
= gfc_resolve_expr (sym
->value
);
11679 gfc_check_assign_symbol (sym
, NULL
, sym
->value
);
11683 /* Verify any BIND(C) derived types in the namespace so we can report errors
11684 for them once, rather than for each variable declared of that type. */
11687 resolve_bind_c_derived_types (gfc_symbol
*derived_sym
)
11689 if (derived_sym
!= NULL
&& derived_sym
->attr
.flavor
== FL_DERIVED
11690 && derived_sym
->attr
.is_bind_c
== 1)
11691 verify_bind_c_derived_type (derived_sym
);
11697 /* Check the interfaces of DTIO procedures associated with derived
11698 type 'sym'. These procedures can either have typebound bindings or
11699 can appear in DTIO generic interfaces. */
11702 gfc_verify_DTIO_procedures (gfc_symbol
*sym
)
11704 if (!sym
|| sym
->attr
.flavor
!= FL_DERIVED
)
11707 gfc_check_dtio_interfaces (sym
);
11712 /* Verify that any binding labels used in a given namespace do not collide
11713 with the names or binding labels of any global symbols. Multiple INTERFACE
11714 for the same procedure are permitted. */
11717 gfc_verify_binding_labels (gfc_symbol
*sym
)
11720 const char *module
;
11722 if (!sym
|| !sym
->attr
.is_bind_c
|| sym
->attr
.is_iso_c
11723 || sym
->attr
.flavor
== FL_DERIVED
|| !sym
->binding_label
)
11726 gsym
= gfc_find_case_gsymbol (gfc_gsym_root
, sym
->binding_label
);
11729 module
= sym
->module
;
11730 else if (sym
->ns
&& sym
->ns
->proc_name
11731 && sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
)
11732 module
= sym
->ns
->proc_name
->name
;
11733 else if (sym
->ns
&& sym
->ns
->parent
11734 && sym
->ns
&& sym
->ns
->parent
->proc_name
11735 && sym
->ns
->parent
->proc_name
->attr
.flavor
== FL_MODULE
)
11736 module
= sym
->ns
->parent
->proc_name
->name
;
11742 && (gsym
->type
== GSYM_FUNCTION
|| gsym
->type
== GSYM_SUBROUTINE
)))
11745 gsym
= gfc_get_gsymbol (sym
->binding_label
);
11746 gsym
->where
= sym
->declared_at
;
11747 gsym
->sym_name
= sym
->name
;
11748 gsym
->binding_label
= sym
->binding_label
;
11749 gsym
->ns
= sym
->ns
;
11750 gsym
->mod_name
= module
;
11751 if (sym
->attr
.function
)
11752 gsym
->type
= GSYM_FUNCTION
;
11753 else if (sym
->attr
.subroutine
)
11754 gsym
->type
= GSYM_SUBROUTINE
;
11755 /* Mark as variable/procedure as defined, unless its an INTERFACE. */
11756 gsym
->defined
= sym
->attr
.if_source
!= IFSRC_IFBODY
;
11760 if (sym
->attr
.flavor
== FL_VARIABLE
&& gsym
->type
!= GSYM_UNKNOWN
)
11762 gfc_error ("Variable %qs with binding label %qs at %L uses the same global "
11763 "identifier as entity at %L", sym
->name
,
11764 sym
->binding_label
, &sym
->declared_at
, &gsym
->where
);
11765 /* Clear the binding label to prevent checking multiple times. */
11766 sym
->binding_label
= NULL
;
11769 else if (sym
->attr
.flavor
== FL_VARIABLE
&& module
11770 && (strcmp (module
, gsym
->mod_name
) != 0
11771 || strcmp (sym
->name
, gsym
->sym_name
) != 0))
11773 /* This can only happen if the variable is defined in a module - if it
11774 isn't the same module, reject it. */
11775 gfc_error ("Variable %qs from module %qs with binding label %qs at %L "
11776 "uses the same global identifier as entity at %L from module %qs",
11777 sym
->name
, module
, sym
->binding_label
,
11778 &sym
->declared_at
, &gsym
->where
, gsym
->mod_name
);
11779 sym
->binding_label
= NULL
;
11781 else if ((sym
->attr
.function
|| sym
->attr
.subroutine
)
11782 && ((gsym
->type
!= GSYM_SUBROUTINE
&& gsym
->type
!= GSYM_FUNCTION
)
11783 || (gsym
->defined
&& sym
->attr
.if_source
!= IFSRC_IFBODY
))
11784 && sym
!= gsym
->ns
->proc_name
11785 && (module
!= gsym
->mod_name
11786 || strcmp (gsym
->sym_name
, sym
->name
) != 0
11787 || (module
&& strcmp (module
, gsym
->mod_name
) != 0)))
11789 /* Print an error if the procedure is defined multiple times; we have to
11790 exclude references to the same procedure via module association or
11791 multiple checks for the same procedure. */
11792 gfc_error ("Procedure %qs with binding label %qs at %L uses the same "
11793 "global identifier as entity at %L", sym
->name
,
11794 sym
->binding_label
, &sym
->declared_at
, &gsym
->where
);
11795 sym
->binding_label
= NULL
;
11800 /* Resolve an index expression. */
11803 resolve_index_expr (gfc_expr
*e
)
11805 if (!gfc_resolve_expr (e
))
11808 if (!gfc_simplify_expr (e
, 0))
11811 if (!gfc_specification_expr (e
))
11818 /* Resolve a charlen structure. */
11821 resolve_charlen (gfc_charlen
*cl
)
11824 bool saved_specification_expr
;
11830 saved_specification_expr
= specification_expr
;
11831 specification_expr
= true;
11833 if (cl
->length_from_typespec
)
11835 if (!gfc_resolve_expr (cl
->length
))
11837 specification_expr
= saved_specification_expr
;
11841 if (!gfc_simplify_expr (cl
->length
, 0))
11843 specification_expr
= saved_specification_expr
;
11847 /* cl->length has been resolved. It should have an integer type. */
11848 if (cl
->length
->ts
.type
!= BT_INTEGER
)
11850 gfc_error ("Scalar INTEGER expression expected at %L",
11851 &cl
->length
->where
);
11857 if (!resolve_index_expr (cl
->length
))
11859 specification_expr
= saved_specification_expr
;
11864 /* F2008, 4.4.3.2: If the character length parameter value evaluates to
11865 a negative value, the length of character entities declared is zero. */
11866 if (cl
->length
&& cl
->length
->expr_type
== EXPR_CONSTANT
11867 && mpz_sgn (cl
->length
->value
.integer
) < 0)
11868 gfc_replace_expr (cl
->length
,
11869 gfc_get_int_expr (gfc_charlen_int_kind
, NULL
, 0));
11871 /* Check that the character length is not too large. */
11872 k
= gfc_validate_kind (BT_INTEGER
, gfc_charlen_int_kind
, false);
11873 if (cl
->length
&& cl
->length
->expr_type
== EXPR_CONSTANT
11874 && cl
->length
->ts
.type
== BT_INTEGER
11875 && mpz_cmp (cl
->length
->value
.integer
, gfc_integer_kinds
[k
].huge
) > 0)
11877 gfc_error ("String length at %L is too large", &cl
->length
->where
);
11878 specification_expr
= saved_specification_expr
;
11882 specification_expr
= saved_specification_expr
;
11887 /* Test for non-constant shape arrays. */
11890 is_non_constant_shape_array (gfc_symbol
*sym
)
11896 not_constant
= false;
11897 if (sym
->as
!= NULL
)
11899 /* Unfortunately, !gfc_is_compile_time_shape hits a legal case that
11900 has not been simplified; parameter array references. Do the
11901 simplification now. */
11902 for (i
= 0; i
< sym
->as
->rank
+ sym
->as
->corank
; i
++)
11904 e
= sym
->as
->lower
[i
];
11905 if (e
&& (!resolve_index_expr(e
)
11906 || !gfc_is_constant_expr (e
)))
11907 not_constant
= true;
11908 e
= sym
->as
->upper
[i
];
11909 if (e
&& (!resolve_index_expr(e
)
11910 || !gfc_is_constant_expr (e
)))
11911 not_constant
= true;
11914 return not_constant
;
11917 /* Given a symbol and an initialization expression, add code to initialize
11918 the symbol to the function entry. */
11920 build_init_assign (gfc_symbol
*sym
, gfc_expr
*init
)
11924 gfc_namespace
*ns
= sym
->ns
;
11926 /* Search for the function namespace if this is a contained
11927 function without an explicit result. */
11928 if (sym
->attr
.function
&& sym
== sym
->result
11929 && sym
->name
!= sym
->ns
->proc_name
->name
)
11931 ns
= ns
->contained
;
11932 for (;ns
; ns
= ns
->sibling
)
11933 if (strcmp (ns
->proc_name
->name
, sym
->name
) == 0)
11939 gfc_free_expr (init
);
11943 /* Build an l-value expression for the result. */
11944 lval
= gfc_lval_expr_from_sym (sym
);
11946 /* Add the code at scope entry. */
11947 init_st
= gfc_get_code (EXEC_INIT_ASSIGN
);
11948 init_st
->next
= ns
->code
;
11949 ns
->code
= init_st
;
11951 /* Assign the default initializer to the l-value. */
11952 init_st
->loc
= sym
->declared_at
;
11953 init_st
->expr1
= lval
;
11954 init_st
->expr2
= init
;
11958 /* Whether or not we can generate a default initializer for a symbol. */
11961 can_generate_init (gfc_symbol
*sym
)
11963 symbol_attribute
*a
;
11968 /* These symbols should never have a default initialization. */
11973 || (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
)
11974 && (CLASS_DATA (sym
)->attr
.class_pointer
11975 || CLASS_DATA (sym
)->attr
.proc_pointer
))
11976 || a
->in_equivalence
11983 || (!a
->referenced
&& !a
->result
)
11984 || (a
->dummy
&& a
->intent
!= INTENT_OUT
)
11985 || (a
->function
&& sym
!= sym
->result
)
11990 /* Assign the default initializer to a derived type variable or result. */
11993 apply_default_init (gfc_symbol
*sym
)
11995 gfc_expr
*init
= NULL
;
11997 if (sym
->attr
.flavor
!= FL_VARIABLE
&& !sym
->attr
.function
)
12000 if (sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
)
12001 init
= gfc_generate_initializer (&sym
->ts
, can_generate_init (sym
));
12003 if (init
== NULL
&& sym
->ts
.type
!= BT_CLASS
)
12006 build_init_assign (sym
, init
);
12007 sym
->attr
.referenced
= 1;
12011 /* Build an initializer for a local. Returns null if the symbol should not have
12012 a default initialization. */
12015 build_default_init_expr (gfc_symbol
*sym
)
12017 /* These symbols should never have a default initialization. */
12018 if (sym
->attr
.allocatable
12019 || sym
->attr
.external
12021 || sym
->attr
.pointer
12022 || sym
->attr
.in_equivalence
12023 || sym
->attr
.in_common
12026 || sym
->attr
.cray_pointee
12027 || sym
->attr
.cray_pointer
12031 /* Get the appropriate init expression. */
12032 return gfc_build_default_init_expr (&sym
->ts
, &sym
->declared_at
);
12035 /* Add an initialization expression to a local variable. */
12037 apply_default_init_local (gfc_symbol
*sym
)
12039 gfc_expr
*init
= NULL
;
12041 /* The symbol should be a variable or a function return value. */
12042 if ((sym
->attr
.flavor
!= FL_VARIABLE
&& !sym
->attr
.function
)
12043 || (sym
->attr
.function
&& sym
->result
!= sym
))
12046 /* Try to build the initializer expression. If we can't initialize
12047 this symbol, then init will be NULL. */
12048 init
= build_default_init_expr (sym
);
12052 /* For saved variables, we don't want to add an initializer at function
12053 entry, so we just add a static initializer. Note that automatic variables
12054 are stack allocated even with -fno-automatic; we have also to exclude
12055 result variable, which are also nonstatic. */
12056 if (!sym
->attr
.automatic
12057 && (sym
->attr
.save
|| sym
->ns
->save_all
12058 || (flag_max_stack_var_size
== 0 && !sym
->attr
.result
12059 && (sym
->ns
->proc_name
&& !sym
->ns
->proc_name
->attr
.recursive
)
12060 && (!sym
->attr
.dimension
|| !is_non_constant_shape_array (sym
)))))
12062 /* Don't clobber an existing initializer! */
12063 gcc_assert (sym
->value
== NULL
);
12068 build_init_assign (sym
, init
);
12072 /* Resolution of common features of flavors variable and procedure. */
12075 resolve_fl_var_and_proc (gfc_symbol
*sym
, int mp_flag
)
12077 gfc_array_spec
*as
;
12079 if (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
)
12080 as
= CLASS_DATA (sym
)->as
;
12084 /* Constraints on deferred shape variable. */
12085 if (as
== NULL
|| as
->type
!= AS_DEFERRED
)
12087 bool pointer
, allocatable
, dimension
;
12089 if (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
)
12091 pointer
= CLASS_DATA (sym
)->attr
.class_pointer
;
12092 allocatable
= CLASS_DATA (sym
)->attr
.allocatable
;
12093 dimension
= CLASS_DATA (sym
)->attr
.dimension
;
12097 pointer
= sym
->attr
.pointer
&& !sym
->attr
.select_type_temporary
;
12098 allocatable
= sym
->attr
.allocatable
;
12099 dimension
= sym
->attr
.dimension
;
12104 if (dimension
&& as
->type
!= AS_ASSUMED_RANK
)
12106 gfc_error ("Allocatable array %qs at %L must have a deferred "
12107 "shape or assumed rank", sym
->name
, &sym
->declared_at
);
12110 else if (!gfc_notify_std (GFC_STD_F2003
, "Scalar object "
12111 "%qs at %L may not be ALLOCATABLE",
12112 sym
->name
, &sym
->declared_at
))
12116 if (pointer
&& dimension
&& as
->type
!= AS_ASSUMED_RANK
)
12118 gfc_error ("Array pointer %qs at %L must have a deferred shape or "
12119 "assumed rank", sym
->name
, &sym
->declared_at
);
12125 if (!mp_flag
&& !sym
->attr
.allocatable
&& !sym
->attr
.pointer
12126 && sym
->ts
.type
!= BT_CLASS
&& !sym
->assoc
)
12128 gfc_error ("Array %qs at %L cannot have a deferred shape",
12129 sym
->name
, &sym
->declared_at
);
12134 /* Constraints on polymorphic variables. */
12135 if (sym
->ts
.type
== BT_CLASS
&& !(sym
->result
&& sym
->result
!= sym
))
12138 if (sym
->attr
.class_ok
12139 && !sym
->attr
.select_type_temporary
12140 && !UNLIMITED_POLY (sym
)
12141 && !gfc_type_is_extensible (CLASS_DATA (sym
)->ts
.u
.derived
))
12143 gfc_error ("Type %qs of CLASS variable %qs at %L is not extensible",
12144 CLASS_DATA (sym
)->ts
.u
.derived
->name
, sym
->name
,
12145 &sym
->declared_at
);
12150 /* Assume that use associated symbols were checked in the module ns.
12151 Class-variables that are associate-names are also something special
12152 and excepted from the test. */
12153 if (!sym
->attr
.class_ok
&& !sym
->attr
.use_assoc
&& !sym
->assoc
)
12155 gfc_error ("CLASS variable %qs at %L must be dummy, allocatable "
12156 "or pointer", sym
->name
, &sym
->declared_at
);
12165 /* Additional checks for symbols with flavor variable and derived
12166 type. To be called from resolve_fl_variable. */
12169 resolve_fl_variable_derived (gfc_symbol
*sym
, int no_init_flag
)
12171 gcc_assert (sym
->ts
.type
== BT_DERIVED
|| sym
->ts
.type
== BT_CLASS
);
12173 /* Check to see if a derived type is blocked from being host
12174 associated by the presence of another class I symbol in the same
12175 namespace. 14.6.1.3 of the standard and the discussion on
12176 comp.lang.fortran. */
12177 if (sym
->ns
!= sym
->ts
.u
.derived
->ns
12178 && !sym
->ts
.u
.derived
->attr
.use_assoc
12179 && sym
->ns
->proc_name
->attr
.if_source
!= IFSRC_IFBODY
)
12182 gfc_find_symbol (sym
->ts
.u
.derived
->name
, sym
->ns
, 0, &s
);
12183 if (s
&& s
->attr
.generic
)
12184 s
= gfc_find_dt_in_generic (s
);
12185 if (s
&& !gfc_fl_struct (s
->attr
.flavor
))
12187 gfc_error ("The type %qs cannot be host associated at %L "
12188 "because it is blocked by an incompatible object "
12189 "of the same name declared at %L",
12190 sym
->ts
.u
.derived
->name
, &sym
->declared_at
,
12196 /* 4th constraint in section 11.3: "If an object of a type for which
12197 component-initialization is specified (R429) appears in the
12198 specification-part of a module and does not have the ALLOCATABLE
12199 or POINTER attribute, the object shall have the SAVE attribute."
12201 The check for initializers is performed with
12202 gfc_has_default_initializer because gfc_default_initializer generates
12203 a hidden default for allocatable components. */
12204 if (!(sym
->value
|| no_init_flag
) && sym
->ns
->proc_name
12205 && sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
12206 && !(sym
->ns
->save_all
&& !sym
->attr
.automatic
) && !sym
->attr
.save
12207 && !sym
->attr
.pointer
&& !sym
->attr
.allocatable
12208 && gfc_has_default_initializer (sym
->ts
.u
.derived
)
12209 && !gfc_notify_std (GFC_STD_F2008
, "Implied SAVE for module variable "
12210 "%qs at %L, needed due to the default "
12211 "initialization", sym
->name
, &sym
->declared_at
))
12214 /* Assign default initializer. */
12215 if (!(sym
->value
|| sym
->attr
.pointer
|| sym
->attr
.allocatable
)
12216 && (!no_init_flag
|| sym
->attr
.intent
== INTENT_OUT
))
12217 sym
->value
= gfc_generate_initializer (&sym
->ts
, can_generate_init (sym
));
12223 /* F2008, C402 (R401): A colon shall not be used as a type-param-value
12224 except in the declaration of an entity or component that has the POINTER
12225 or ALLOCATABLE attribute. */
12228 deferred_requirements (gfc_symbol
*sym
)
12230 if (sym
->ts
.deferred
12231 && !(sym
->attr
.pointer
12232 || sym
->attr
.allocatable
12233 || sym
->attr
.associate_var
12234 || sym
->attr
.omp_udr_artificial_var
))
12236 gfc_error ("Entity %qs at %L has a deferred type parameter and "
12237 "requires either the POINTER or ALLOCATABLE attribute",
12238 sym
->name
, &sym
->declared_at
);
12245 /* Resolve symbols with flavor variable. */
12248 resolve_fl_variable (gfc_symbol
*sym
, int mp_flag
)
12250 int no_init_flag
, automatic_flag
;
12252 const char *auto_save_msg
;
12253 bool saved_specification_expr
;
12255 auto_save_msg
= "Automatic object %qs at %L cannot have the "
12258 if (!resolve_fl_var_and_proc (sym
, mp_flag
))
12261 /* Set this flag to check that variables are parameters of all entries.
12262 This check is effected by the call to gfc_resolve_expr through
12263 is_non_constant_shape_array. */
12264 saved_specification_expr
= specification_expr
;
12265 specification_expr
= true;
12267 if (sym
->ns
->proc_name
12268 && (sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
12269 || sym
->ns
->proc_name
->attr
.is_main_program
)
12270 && !sym
->attr
.use_assoc
12271 && !sym
->attr
.allocatable
12272 && !sym
->attr
.pointer
12273 && is_non_constant_shape_array (sym
))
12275 /* F08:C541. The shape of an array defined in a main program or module
12276 * needs to be constant. */
12277 gfc_error ("The module or main program array %qs at %L must "
12278 "have constant shape", sym
->name
, &sym
->declared_at
);
12279 specification_expr
= saved_specification_expr
;
12283 /* Constraints on deferred type parameter. */
12284 if (!deferred_requirements (sym
))
12287 if (sym
->ts
.type
== BT_CHARACTER
&& !sym
->attr
.associate_var
)
12289 /* Make sure that character string variables with assumed length are
12290 dummy arguments. */
12291 e
= sym
->ts
.u
.cl
->length
;
12292 if (e
== NULL
&& !sym
->attr
.dummy
&& !sym
->attr
.result
12293 && !sym
->ts
.deferred
&& !sym
->attr
.select_type_temporary
12294 && !sym
->attr
.omp_udr_artificial_var
)
12296 gfc_error ("Entity with assumed character length at %L must be a "
12297 "dummy argument or a PARAMETER", &sym
->declared_at
);
12298 specification_expr
= saved_specification_expr
;
12302 if (e
&& sym
->attr
.save
== SAVE_EXPLICIT
&& !gfc_is_constant_expr (e
))
12304 gfc_error (auto_save_msg
, sym
->name
, &sym
->declared_at
);
12305 specification_expr
= saved_specification_expr
;
12309 if (!gfc_is_constant_expr (e
)
12310 && !(e
->expr_type
== EXPR_VARIABLE
12311 && e
->symtree
->n
.sym
->attr
.flavor
== FL_PARAMETER
))
12313 if (!sym
->attr
.use_assoc
&& sym
->ns
->proc_name
12314 && (sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
12315 || sym
->ns
->proc_name
->attr
.is_main_program
))
12317 gfc_error ("%qs at %L must have constant character length "
12318 "in this context", sym
->name
, &sym
->declared_at
);
12319 specification_expr
= saved_specification_expr
;
12322 if (sym
->attr
.in_common
)
12324 gfc_error ("COMMON variable %qs at %L must have constant "
12325 "character length", sym
->name
, &sym
->declared_at
);
12326 specification_expr
= saved_specification_expr
;
12332 if (sym
->value
== NULL
&& sym
->attr
.referenced
)
12333 apply_default_init_local (sym
); /* Try to apply a default initialization. */
12335 /* Determine if the symbol may not have an initializer. */
12336 no_init_flag
= automatic_flag
= 0;
12337 if (sym
->attr
.allocatable
|| sym
->attr
.external
|| sym
->attr
.dummy
12338 || sym
->attr
.intrinsic
|| sym
->attr
.result
)
12340 else if ((sym
->attr
.dimension
|| sym
->attr
.codimension
) && !sym
->attr
.pointer
12341 && is_non_constant_shape_array (sym
))
12343 no_init_flag
= automatic_flag
= 1;
12345 /* Also, they must not have the SAVE attribute.
12346 SAVE_IMPLICIT is checked below. */
12347 if (sym
->as
&& sym
->attr
.codimension
)
12349 int corank
= sym
->as
->corank
;
12350 sym
->as
->corank
= 0;
12351 no_init_flag
= automatic_flag
= is_non_constant_shape_array (sym
);
12352 sym
->as
->corank
= corank
;
12354 if (automatic_flag
&& sym
->attr
.save
== SAVE_EXPLICIT
)
12356 gfc_error (auto_save_msg
, sym
->name
, &sym
->declared_at
);
12357 specification_expr
= saved_specification_expr
;
12362 /* Ensure that any initializer is simplified. */
12364 gfc_simplify_expr (sym
->value
, 1);
12366 /* Reject illegal initializers. */
12367 if (!sym
->mark
&& sym
->value
)
12369 if (sym
->attr
.allocatable
|| (sym
->ts
.type
== BT_CLASS
12370 && CLASS_DATA (sym
)->attr
.allocatable
))
12371 gfc_error ("Allocatable %qs at %L cannot have an initializer",
12372 sym
->name
, &sym
->declared_at
);
12373 else if (sym
->attr
.external
)
12374 gfc_error ("External %qs at %L cannot have an initializer",
12375 sym
->name
, &sym
->declared_at
);
12376 else if (sym
->attr
.dummy
12377 && !(sym
->ts
.type
== BT_DERIVED
&& sym
->attr
.intent
== INTENT_OUT
))
12378 gfc_error ("Dummy %qs at %L cannot have an initializer",
12379 sym
->name
, &sym
->declared_at
);
12380 else if (sym
->attr
.intrinsic
)
12381 gfc_error ("Intrinsic %qs at %L cannot have an initializer",
12382 sym
->name
, &sym
->declared_at
);
12383 else if (sym
->attr
.result
)
12384 gfc_error ("Function result %qs at %L cannot have an initializer",
12385 sym
->name
, &sym
->declared_at
);
12386 else if (automatic_flag
)
12387 gfc_error ("Automatic array %qs at %L cannot have an initializer",
12388 sym
->name
, &sym
->declared_at
);
12390 goto no_init_error
;
12391 specification_expr
= saved_specification_expr
;
12396 if (sym
->ts
.type
== BT_DERIVED
|| sym
->ts
.type
== BT_CLASS
)
12398 bool res
= resolve_fl_variable_derived (sym
, no_init_flag
);
12399 specification_expr
= saved_specification_expr
;
12403 specification_expr
= saved_specification_expr
;
12408 /* Compare the dummy characteristics of a module procedure interface
12409 declaration with the corresponding declaration in a submodule. */
12410 static gfc_formal_arglist
*new_formal
;
12411 static char errmsg
[200];
12414 compare_fsyms (gfc_symbol
*sym
)
12418 if (sym
== NULL
|| new_formal
== NULL
)
12421 fsym
= new_formal
->sym
;
12426 if (strcmp (sym
->name
, fsym
->name
) == 0)
12428 if (!gfc_check_dummy_characteristics (fsym
, sym
, true, errmsg
, 200))
12429 gfc_error ("%s at %L", errmsg
, &fsym
->declared_at
);
12434 /* Resolve a procedure. */
12437 resolve_fl_procedure (gfc_symbol
*sym
, int mp_flag
)
12439 gfc_formal_arglist
*arg
;
12441 if (sym
->attr
.function
12442 && !resolve_fl_var_and_proc (sym
, mp_flag
))
12445 if (sym
->ts
.type
== BT_CHARACTER
)
12447 gfc_charlen
*cl
= sym
->ts
.u
.cl
;
12449 if (cl
&& cl
->length
&& gfc_is_constant_expr (cl
->length
)
12450 && !resolve_charlen (cl
))
12453 if ((!cl
|| !cl
->length
|| cl
->length
->expr_type
!= EXPR_CONSTANT
)
12454 && sym
->attr
.proc
== PROC_ST_FUNCTION
)
12456 gfc_error ("Character-valued statement function %qs at %L must "
12457 "have constant length", sym
->name
, &sym
->declared_at
);
12462 /* Ensure that derived type for are not of a private type. Internal
12463 module procedures are excluded by 2.2.3.3 - i.e., they are not
12464 externally accessible and can access all the objects accessible in
12466 if (!(sym
->ns
->parent
12467 && sym
->ns
->parent
->proc_name
->attr
.flavor
== FL_MODULE
)
12468 && gfc_check_symbol_access (sym
))
12470 gfc_interface
*iface
;
12472 for (arg
= gfc_sym_get_dummy_args (sym
); arg
; arg
= arg
->next
)
12475 && arg
->sym
->ts
.type
== BT_DERIVED
12476 && !arg
->sym
->ts
.u
.derived
->attr
.use_assoc
12477 && !gfc_check_symbol_access (arg
->sym
->ts
.u
.derived
)
12478 && !gfc_notify_std (GFC_STD_F2003
, "%qs is of a PRIVATE type "
12479 "and cannot be a dummy argument"
12480 " of %qs, which is PUBLIC at %L",
12481 arg
->sym
->name
, sym
->name
,
12482 &sym
->declared_at
))
12484 /* Stop this message from recurring. */
12485 arg
->sym
->ts
.u
.derived
->attr
.access
= ACCESS_PUBLIC
;
12490 /* PUBLIC interfaces may expose PRIVATE procedures that take types
12491 PRIVATE to the containing module. */
12492 for (iface
= sym
->generic
; iface
; iface
= iface
->next
)
12494 for (arg
= gfc_sym_get_dummy_args (iface
->sym
); arg
; arg
= arg
->next
)
12497 && arg
->sym
->ts
.type
== BT_DERIVED
12498 && !arg
->sym
->ts
.u
.derived
->attr
.use_assoc
12499 && !gfc_check_symbol_access (arg
->sym
->ts
.u
.derived
)
12500 && !gfc_notify_std (GFC_STD_F2003
, "Procedure %qs in "
12501 "PUBLIC interface %qs at %L "
12502 "takes dummy arguments of %qs which "
12503 "is PRIVATE", iface
->sym
->name
,
12504 sym
->name
, &iface
->sym
->declared_at
,
12505 gfc_typename(&arg
->sym
->ts
)))
12507 /* Stop this message from recurring. */
12508 arg
->sym
->ts
.u
.derived
->attr
.access
= ACCESS_PUBLIC
;
12515 if (sym
->attr
.function
&& sym
->value
&& sym
->attr
.proc
!= PROC_ST_FUNCTION
12516 && !sym
->attr
.proc_pointer
)
12518 gfc_error ("Function %qs at %L cannot have an initializer",
12519 sym
->name
, &sym
->declared_at
);
12523 /* An external symbol may not have an initializer because it is taken to be
12524 a procedure. Exception: Procedure Pointers. */
12525 if (sym
->attr
.external
&& sym
->value
&& !sym
->attr
.proc_pointer
)
12527 gfc_error ("External object %qs at %L may not have an initializer",
12528 sym
->name
, &sym
->declared_at
);
12532 /* An elemental function is required to return a scalar 12.7.1 */
12533 if (sym
->attr
.elemental
&& sym
->attr
.function
12534 && (sym
->as
|| (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
)->as
)))
12536 gfc_error ("ELEMENTAL function %qs at %L must have a scalar "
12537 "result", sym
->name
, &sym
->declared_at
);
12538 /* Reset so that the error only occurs once. */
12539 sym
->attr
.elemental
= 0;
12543 if (sym
->attr
.proc
== PROC_ST_FUNCTION
12544 && (sym
->attr
.allocatable
|| sym
->attr
.pointer
))
12546 gfc_error ("Statement function %qs at %L may not have pointer or "
12547 "allocatable attribute", sym
->name
, &sym
->declared_at
);
12551 /* 5.1.1.5 of the Standard: A function name declared with an asterisk
12552 char-len-param shall not be array-valued, pointer-valued, recursive
12553 or pure. ....snip... A character value of * may only be used in the
12554 following ways: (i) Dummy arg of procedure - dummy associates with
12555 actual length; (ii) To declare a named constant; or (iii) External
12556 function - but length must be declared in calling scoping unit. */
12557 if (sym
->attr
.function
12558 && sym
->ts
.type
== BT_CHARACTER
&& !sym
->ts
.deferred
12559 && sym
->ts
.u
.cl
&& sym
->ts
.u
.cl
->length
== NULL
)
12561 if ((sym
->as
&& sym
->as
->rank
) || (sym
->attr
.pointer
)
12562 || (sym
->attr
.recursive
) || (sym
->attr
.pure
))
12564 if (sym
->as
&& sym
->as
->rank
)
12565 gfc_error ("CHARACTER(*) function %qs at %L cannot be "
12566 "array-valued", sym
->name
, &sym
->declared_at
);
12568 if (sym
->attr
.pointer
)
12569 gfc_error ("CHARACTER(*) function %qs at %L cannot be "
12570 "pointer-valued", sym
->name
, &sym
->declared_at
);
12572 if (sym
->attr
.pure
)
12573 gfc_error ("CHARACTER(*) function %qs at %L cannot be "
12574 "pure", sym
->name
, &sym
->declared_at
);
12576 if (sym
->attr
.recursive
)
12577 gfc_error ("CHARACTER(*) function %qs at %L cannot be "
12578 "recursive", sym
->name
, &sym
->declared_at
);
12583 /* Appendix B.2 of the standard. Contained functions give an
12584 error anyway. Deferred character length is an F2003 feature.
12585 Don't warn on intrinsic conversion functions, which start
12586 with two underscores. */
12587 if (!sym
->attr
.contained
&& !sym
->ts
.deferred
12588 && (sym
->name
[0] != '_' || sym
->name
[1] != '_'))
12589 gfc_notify_std (GFC_STD_F95_OBS
,
12590 "CHARACTER(*) function %qs at %L",
12591 sym
->name
, &sym
->declared_at
);
12594 /* F2008, C1218. */
12595 if (sym
->attr
.elemental
)
12597 if (sym
->attr
.proc_pointer
)
12599 gfc_error ("Procedure pointer %qs at %L shall not be elemental",
12600 sym
->name
, &sym
->declared_at
);
12603 if (sym
->attr
.dummy
)
12605 gfc_error ("Dummy procedure %qs at %L shall not be elemental",
12606 sym
->name
, &sym
->declared_at
);
12611 /* F2018, C15100: "The result of an elemental function shall be scalar,
12612 and shall not have the POINTER or ALLOCATABLE attribute." The scalar
12613 pointer is tested and caught elsewhere. */
12614 if (sym
->attr
.elemental
&& sym
->result
12615 && (sym
->result
->attr
.allocatable
|| sym
->result
->attr
.pointer
))
12617 gfc_error ("Function result variable %qs at %L of elemental "
12618 "function %qs shall not have an ALLOCATABLE or POINTER "
12619 "attribute", sym
->result
->name
,
12620 &sym
->result
->declared_at
, sym
->name
);
12624 if (sym
->attr
.is_bind_c
&& sym
->attr
.is_c_interop
!= 1)
12626 gfc_formal_arglist
*curr_arg
;
12627 int has_non_interop_arg
= 0;
12629 if (!verify_bind_c_sym (sym
, &(sym
->ts
), sym
->attr
.in_common
,
12630 sym
->common_block
))
12632 /* Clear these to prevent looking at them again if there was an
12634 sym
->attr
.is_bind_c
= 0;
12635 sym
->attr
.is_c_interop
= 0;
12636 sym
->ts
.is_c_interop
= 0;
12640 /* So far, no errors have been found. */
12641 sym
->attr
.is_c_interop
= 1;
12642 sym
->ts
.is_c_interop
= 1;
12645 curr_arg
= gfc_sym_get_dummy_args (sym
);
12646 while (curr_arg
!= NULL
)
12648 /* Skip implicitly typed dummy args here. */
12649 if (curr_arg
->sym
&& curr_arg
->sym
->attr
.implicit_type
== 0)
12650 if (!gfc_verify_c_interop_param (curr_arg
->sym
))
12651 /* If something is found to fail, record the fact so we
12652 can mark the symbol for the procedure as not being
12653 BIND(C) to try and prevent multiple errors being
12655 has_non_interop_arg
= 1;
12657 curr_arg
= curr_arg
->next
;
12660 /* See if any of the arguments were not interoperable and if so, clear
12661 the procedure symbol to prevent duplicate error messages. */
12662 if (has_non_interop_arg
!= 0)
12664 sym
->attr
.is_c_interop
= 0;
12665 sym
->ts
.is_c_interop
= 0;
12666 sym
->attr
.is_bind_c
= 0;
12670 if (!sym
->attr
.proc_pointer
)
12672 if (sym
->attr
.save
== SAVE_EXPLICIT
)
12674 gfc_error ("PROCEDURE attribute conflicts with SAVE attribute "
12675 "in %qs at %L", sym
->name
, &sym
->declared_at
);
12678 if (sym
->attr
.intent
)
12680 gfc_error ("PROCEDURE attribute conflicts with INTENT attribute "
12681 "in %qs at %L", sym
->name
, &sym
->declared_at
);
12684 if (sym
->attr
.subroutine
&& sym
->attr
.result
)
12686 gfc_error ("PROCEDURE attribute conflicts with RESULT attribute "
12687 "in %qs at %L", sym
->name
, &sym
->declared_at
);
12690 if (sym
->attr
.external
&& sym
->attr
.function
&& !sym
->attr
.module_procedure
12691 && ((sym
->attr
.if_source
== IFSRC_DECL
&& !sym
->attr
.procedure
)
12692 || sym
->attr
.contained
))
12694 gfc_error ("EXTERNAL attribute conflicts with FUNCTION attribute "
12695 "in %qs at %L", sym
->name
, &sym
->declared_at
);
12698 if (strcmp ("ppr@", sym
->name
) == 0)
12700 gfc_error ("Procedure pointer result %qs at %L "
12701 "is missing the pointer attribute",
12702 sym
->ns
->proc_name
->name
, &sym
->declared_at
);
12707 /* Assume that a procedure whose body is not known has references
12708 to external arrays. */
12709 if (sym
->attr
.if_source
!= IFSRC_DECL
)
12710 sym
->attr
.array_outer_dependency
= 1;
12712 /* Compare the characteristics of a module procedure with the
12713 interface declaration. Ideally this would be done with
12714 gfc_compare_interfaces but, at present, the formal interface
12715 cannot be copied to the ts.interface. */
12716 if (sym
->attr
.module_procedure
12717 && sym
->attr
.if_source
== IFSRC_DECL
)
12720 char name
[2*GFC_MAX_SYMBOL_LEN
+ 1];
12722 char *submodule_name
;
12723 strcpy (name
, sym
->ns
->proc_name
->name
);
12724 module_name
= strtok (name
, ".");
12725 submodule_name
= strtok (NULL
, ".");
12727 iface
= sym
->tlink
;
12730 /* Make sure that the result uses the correct charlen for deferred
12732 if (iface
&& sym
->result
12733 && iface
->ts
.type
== BT_CHARACTER
12734 && iface
->ts
.deferred
)
12735 sym
->result
->ts
.u
.cl
= iface
->ts
.u
.cl
;
12740 /* Check the procedure characteristics. */
12741 if (sym
->attr
.elemental
!= iface
->attr
.elemental
)
12743 gfc_error ("Mismatch in ELEMENTAL attribute between MODULE "
12744 "PROCEDURE at %L and its interface in %s",
12745 &sym
->declared_at
, module_name
);
12749 if (sym
->attr
.pure
!= iface
->attr
.pure
)
12751 gfc_error ("Mismatch in PURE attribute between MODULE "
12752 "PROCEDURE at %L and its interface in %s",
12753 &sym
->declared_at
, module_name
);
12757 if (sym
->attr
.recursive
!= iface
->attr
.recursive
)
12759 gfc_error ("Mismatch in RECURSIVE attribute between MODULE "
12760 "PROCEDURE at %L and its interface in %s",
12761 &sym
->declared_at
, module_name
);
12765 /* Check the result characteristics. */
12766 if (!gfc_check_result_characteristics (sym
, iface
, errmsg
, 200))
12768 gfc_error ("%s between the MODULE PROCEDURE declaration "
12769 "in MODULE %qs and the declaration at %L in "
12771 errmsg
, module_name
, &sym
->declared_at
,
12772 submodule_name
? submodule_name
: module_name
);
12777 /* Check the characteristics of the formal arguments. */
12778 if (sym
->formal
&& sym
->formal_ns
)
12780 for (arg
= sym
->formal
; arg
&& arg
->sym
; arg
= arg
->next
)
12783 gfc_traverse_ns (sym
->formal_ns
, compare_fsyms
);
12791 /* Resolve a list of finalizer procedures. That is, after they have hopefully
12792 been defined and we now know their defined arguments, check that they fulfill
12793 the requirements of the standard for procedures used as finalizers. */
12796 gfc_resolve_finalizers (gfc_symbol
* derived
, bool *finalizable
)
12798 gfc_finalizer
* list
;
12799 gfc_finalizer
** prev_link
; /* For removing wrong entries from the list. */
12800 bool result
= true;
12801 bool seen_scalar
= false;
12804 gfc_symbol
*parent
= gfc_get_derived_super_type (derived
);
12807 gfc_resolve_finalizers (parent
, finalizable
);
12809 /* Ensure that derived-type components have a their finalizers resolved. */
12810 bool has_final
= derived
->f2k_derived
&& derived
->f2k_derived
->finalizers
;
12811 for (c
= derived
->components
; c
; c
= c
->next
)
12812 if (c
->ts
.type
== BT_DERIVED
12813 && !c
->attr
.pointer
&& !c
->attr
.proc_pointer
&& !c
->attr
.allocatable
)
12815 bool has_final2
= false;
12816 if (!gfc_resolve_finalizers (c
->ts
.u
.derived
, &has_final2
))
12817 return false; /* Error. */
12818 has_final
= has_final
|| has_final2
;
12820 /* Return early if not finalizable. */
12824 *finalizable
= false;
12828 /* Walk over the list of finalizer-procedures, check them, and if any one
12829 does not fit in with the standard's definition, print an error and remove
12830 it from the list. */
12831 prev_link
= &derived
->f2k_derived
->finalizers
;
12832 for (list
= derived
->f2k_derived
->finalizers
; list
; list
= *prev_link
)
12834 gfc_formal_arglist
*dummy_args
;
12839 /* Skip this finalizer if we already resolved it. */
12840 if (list
->proc_tree
)
12842 if (list
->proc_tree
->n
.sym
->formal
->sym
->as
== NULL
12843 || list
->proc_tree
->n
.sym
->formal
->sym
->as
->rank
== 0)
12844 seen_scalar
= true;
12845 prev_link
= &(list
->next
);
12849 /* Check this exists and is a SUBROUTINE. */
12850 if (!list
->proc_sym
->attr
.subroutine
)
12852 gfc_error ("FINAL procedure %qs at %L is not a SUBROUTINE",
12853 list
->proc_sym
->name
, &list
->where
);
12857 /* We should have exactly one argument. */
12858 dummy_args
= gfc_sym_get_dummy_args (list
->proc_sym
);
12859 if (!dummy_args
|| dummy_args
->next
)
12861 gfc_error ("FINAL procedure at %L must have exactly one argument",
12865 arg
= dummy_args
->sym
;
12867 /* This argument must be of our type. */
12868 if (arg
->ts
.type
!= BT_DERIVED
|| arg
->ts
.u
.derived
!= derived
)
12870 gfc_error ("Argument of FINAL procedure at %L must be of type %qs",
12871 &arg
->declared_at
, derived
->name
);
12875 /* It must neither be a pointer nor allocatable nor optional. */
12876 if (arg
->attr
.pointer
)
12878 gfc_error ("Argument of FINAL procedure at %L must not be a POINTER",
12879 &arg
->declared_at
);
12882 if (arg
->attr
.allocatable
)
12884 gfc_error ("Argument of FINAL procedure at %L must not be"
12885 " ALLOCATABLE", &arg
->declared_at
);
12888 if (arg
->attr
.optional
)
12890 gfc_error ("Argument of FINAL procedure at %L must not be OPTIONAL",
12891 &arg
->declared_at
);
12895 /* It must not be INTENT(OUT). */
12896 if (arg
->attr
.intent
== INTENT_OUT
)
12898 gfc_error ("Argument of FINAL procedure at %L must not be"
12899 " INTENT(OUT)", &arg
->declared_at
);
12903 /* Warn if the procedure is non-scalar and not assumed shape. */
12904 if (warn_surprising
&& arg
->as
&& arg
->as
->rank
!= 0
12905 && arg
->as
->type
!= AS_ASSUMED_SHAPE
)
12906 gfc_warning (OPT_Wsurprising
,
12907 "Non-scalar FINAL procedure at %L should have assumed"
12908 " shape argument", &arg
->declared_at
);
12910 /* Check that it does not match in kind and rank with a FINAL procedure
12911 defined earlier. To really loop over the *earlier* declarations,
12912 we need to walk the tail of the list as new ones were pushed at the
12914 /* TODO: Handle kind parameters once they are implemented. */
12915 my_rank
= (arg
->as
? arg
->as
->rank
: 0);
12916 for (i
= list
->next
; i
; i
= i
->next
)
12918 gfc_formal_arglist
*dummy_args
;
12920 /* Argument list might be empty; that is an error signalled earlier,
12921 but we nevertheless continued resolving. */
12922 dummy_args
= gfc_sym_get_dummy_args (i
->proc_sym
);
12925 gfc_symbol
* i_arg
= dummy_args
->sym
;
12926 const int i_rank
= (i_arg
->as
? i_arg
->as
->rank
: 0);
12927 if (i_rank
== my_rank
)
12929 gfc_error ("FINAL procedure %qs declared at %L has the same"
12930 " rank (%d) as %qs",
12931 list
->proc_sym
->name
, &list
->where
, my_rank
,
12932 i
->proc_sym
->name
);
12938 /* Is this the/a scalar finalizer procedure? */
12940 seen_scalar
= true;
12942 /* Find the symtree for this procedure. */
12943 gcc_assert (!list
->proc_tree
);
12944 list
->proc_tree
= gfc_find_sym_in_symtree (list
->proc_sym
);
12946 prev_link
= &list
->next
;
12949 /* Remove wrong nodes immediately from the list so we don't risk any
12950 troubles in the future when they might fail later expectations. */
12953 *prev_link
= list
->next
;
12954 gfc_free_finalizer (i
);
12958 if (result
== false)
12961 /* Warn if we haven't seen a scalar finalizer procedure (but we know there
12962 were nodes in the list, must have been for arrays. It is surely a good
12963 idea to have a scalar version there if there's something to finalize. */
12964 if (warn_surprising
&& derived
->f2k_derived
->finalizers
&& !seen_scalar
)
12965 gfc_warning (OPT_Wsurprising
,
12966 "Only array FINAL procedures declared for derived type %qs"
12967 " defined at %L, suggest also scalar one",
12968 derived
->name
, &derived
->declared_at
);
12970 vtab
= gfc_find_derived_vtab (derived
);
12971 c
= vtab
->ts
.u
.derived
->components
->next
->next
->next
->next
->next
;
12972 gfc_set_sym_referenced (c
->initializer
->symtree
->n
.sym
);
12975 *finalizable
= true;
12981 /* Check if two GENERIC targets are ambiguous and emit an error is they are. */
12984 check_generic_tbp_ambiguity (gfc_tbp_generic
* t1
, gfc_tbp_generic
* t2
,
12985 const char* generic_name
, locus where
)
12987 gfc_symbol
*sym1
, *sym2
;
12988 const char *pass1
, *pass2
;
12989 gfc_formal_arglist
*dummy_args
;
12991 gcc_assert (t1
->specific
&& t2
->specific
);
12992 gcc_assert (!t1
->specific
->is_generic
);
12993 gcc_assert (!t2
->specific
->is_generic
);
12994 gcc_assert (t1
->is_operator
== t2
->is_operator
);
12996 sym1
= t1
->specific
->u
.specific
->n
.sym
;
12997 sym2
= t2
->specific
->u
.specific
->n
.sym
;
13002 /* Both must be SUBROUTINEs or both must be FUNCTIONs. */
13003 if (sym1
->attr
.subroutine
!= sym2
->attr
.subroutine
13004 || sym1
->attr
.function
!= sym2
->attr
.function
)
13006 gfc_error ("%qs and %qs can't be mixed FUNCTION/SUBROUTINE for"
13007 " GENERIC %qs at %L",
13008 sym1
->name
, sym2
->name
, generic_name
, &where
);
13012 /* Determine PASS arguments. */
13013 if (t1
->specific
->nopass
)
13015 else if (t1
->specific
->pass_arg
)
13016 pass1
= t1
->specific
->pass_arg
;
13019 dummy_args
= gfc_sym_get_dummy_args (t1
->specific
->u
.specific
->n
.sym
);
13021 pass1
= dummy_args
->sym
->name
;
13025 if (t2
->specific
->nopass
)
13027 else if (t2
->specific
->pass_arg
)
13028 pass2
= t2
->specific
->pass_arg
;
13031 dummy_args
= gfc_sym_get_dummy_args (t2
->specific
->u
.specific
->n
.sym
);
13033 pass2
= dummy_args
->sym
->name
;
13038 /* Compare the interfaces. */
13039 if (gfc_compare_interfaces (sym1
, sym2
, sym2
->name
, !t1
->is_operator
, 0,
13040 NULL
, 0, pass1
, pass2
))
13042 gfc_error ("%qs and %qs for GENERIC %qs at %L are ambiguous",
13043 sym1
->name
, sym2
->name
, generic_name
, &where
);
13051 /* Worker function for resolving a generic procedure binding; this is used to
13052 resolve GENERIC as well as user and intrinsic OPERATOR typebound procedures.
13054 The difference between those cases is finding possible inherited bindings
13055 that are overridden, as one has to look for them in tb_sym_root,
13056 tb_uop_root or tb_op, respectively. Thus the caller must already find
13057 the super-type and set p->overridden correctly. */
13060 resolve_tb_generic_targets (gfc_symbol
* super_type
,
13061 gfc_typebound_proc
* p
, const char* name
)
13063 gfc_tbp_generic
* target
;
13064 gfc_symtree
* first_target
;
13065 gfc_symtree
* inherited
;
13067 gcc_assert (p
&& p
->is_generic
);
13069 /* Try to find the specific bindings for the symtrees in our target-list. */
13070 gcc_assert (p
->u
.generic
);
13071 for (target
= p
->u
.generic
; target
; target
= target
->next
)
13072 if (!target
->specific
)
13074 gfc_typebound_proc
* overridden_tbp
;
13075 gfc_tbp_generic
* g
;
13076 const char* target_name
;
13078 target_name
= target
->specific_st
->name
;
13080 /* Defined for this type directly. */
13081 if (target
->specific_st
->n
.tb
&& !target
->specific_st
->n
.tb
->error
)
13083 target
->specific
= target
->specific_st
->n
.tb
;
13084 goto specific_found
;
13087 /* Look for an inherited specific binding. */
13090 inherited
= gfc_find_typebound_proc (super_type
, NULL
, target_name
,
13095 gcc_assert (inherited
->n
.tb
);
13096 target
->specific
= inherited
->n
.tb
;
13097 goto specific_found
;
13101 gfc_error ("Undefined specific binding %qs as target of GENERIC %qs"
13102 " at %L", target_name
, name
, &p
->where
);
13105 /* Once we've found the specific binding, check it is not ambiguous with
13106 other specifics already found or inherited for the same GENERIC. */
13108 gcc_assert (target
->specific
);
13110 /* This must really be a specific binding! */
13111 if (target
->specific
->is_generic
)
13113 gfc_error ("GENERIC %qs at %L must target a specific binding,"
13114 " %qs is GENERIC, too", name
, &p
->where
, target_name
);
13118 /* Check those already resolved on this type directly. */
13119 for (g
= p
->u
.generic
; g
; g
= g
->next
)
13120 if (g
!= target
&& g
->specific
13121 && !check_generic_tbp_ambiguity (target
, g
, name
, p
->where
))
13124 /* Check for ambiguity with inherited specific targets. */
13125 for (overridden_tbp
= p
->overridden
; overridden_tbp
;
13126 overridden_tbp
= overridden_tbp
->overridden
)
13127 if (overridden_tbp
->is_generic
)
13129 for (g
= overridden_tbp
->u
.generic
; g
; g
= g
->next
)
13131 gcc_assert (g
->specific
);
13132 if (!check_generic_tbp_ambiguity (target
, g
, name
, p
->where
))
13138 /* If we attempt to "overwrite" a specific binding, this is an error. */
13139 if (p
->overridden
&& !p
->overridden
->is_generic
)
13141 gfc_error ("GENERIC %qs at %L can't overwrite specific binding with"
13142 " the same name", name
, &p
->where
);
13146 /* Take the SUBROUTINE/FUNCTION attributes of the first specific target, as
13147 all must have the same attributes here. */
13148 first_target
= p
->u
.generic
->specific
->u
.specific
;
13149 gcc_assert (first_target
);
13150 p
->subroutine
= first_target
->n
.sym
->attr
.subroutine
;
13151 p
->function
= first_target
->n
.sym
->attr
.function
;
13157 /* Resolve a GENERIC procedure binding for a derived type. */
13160 resolve_typebound_generic (gfc_symbol
* derived
, gfc_symtree
* st
)
13162 gfc_symbol
* super_type
;
13164 /* Find the overridden binding if any. */
13165 st
->n
.tb
->overridden
= NULL
;
13166 super_type
= gfc_get_derived_super_type (derived
);
13169 gfc_symtree
* overridden
;
13170 overridden
= gfc_find_typebound_proc (super_type
, NULL
, st
->name
,
13173 if (overridden
&& overridden
->n
.tb
)
13174 st
->n
.tb
->overridden
= overridden
->n
.tb
;
13177 /* Resolve using worker function. */
13178 return resolve_tb_generic_targets (super_type
, st
->n
.tb
, st
->name
);
13182 /* Retrieve the target-procedure of an operator binding and do some checks in
13183 common for intrinsic and user-defined type-bound operators. */
13186 get_checked_tb_operator_target (gfc_tbp_generic
* target
, locus where
)
13188 gfc_symbol
* target_proc
;
13190 gcc_assert (target
->specific
&& !target
->specific
->is_generic
);
13191 target_proc
= target
->specific
->u
.specific
->n
.sym
;
13192 gcc_assert (target_proc
);
13194 /* F08:C468. All operator bindings must have a passed-object dummy argument. */
13195 if (target
->specific
->nopass
)
13197 gfc_error ("Type-bound operator at %L can't be NOPASS", &where
);
13201 return target_proc
;
13205 /* Resolve a type-bound intrinsic operator. */
13208 resolve_typebound_intrinsic_op (gfc_symbol
* derived
, gfc_intrinsic_op op
,
13209 gfc_typebound_proc
* p
)
13211 gfc_symbol
* super_type
;
13212 gfc_tbp_generic
* target
;
13214 /* If there's already an error here, do nothing (but don't fail again). */
13218 /* Operators should always be GENERIC bindings. */
13219 gcc_assert (p
->is_generic
);
13221 /* Look for an overridden binding. */
13222 super_type
= gfc_get_derived_super_type (derived
);
13223 if (super_type
&& super_type
->f2k_derived
)
13224 p
->overridden
= gfc_find_typebound_intrinsic_op (super_type
, NULL
,
13227 p
->overridden
= NULL
;
13229 /* Resolve general GENERIC properties using worker function. */
13230 if (!resolve_tb_generic_targets (super_type
, p
, gfc_op2string(op
)))
13233 /* Check the targets to be procedures of correct interface. */
13234 for (target
= p
->u
.generic
; target
; target
= target
->next
)
13236 gfc_symbol
* target_proc
;
13238 target_proc
= get_checked_tb_operator_target (target
, p
->where
);
13242 if (!gfc_check_operator_interface (target_proc
, op
, p
->where
))
13245 /* Add target to non-typebound operator list. */
13246 if (!target
->specific
->deferred
&& !derived
->attr
.use_assoc
13247 && p
->access
!= ACCESS_PRIVATE
&& derived
->ns
== gfc_current_ns
)
13249 gfc_interface
*head
, *intr
;
13251 /* Preempt 'gfc_check_new_interface' for submodules, where the
13252 mechanism for handling module procedures winds up resolving
13253 operator interfaces twice and would otherwise cause an error. */
13254 for (intr
= derived
->ns
->op
[op
]; intr
; intr
= intr
->next
)
13255 if (intr
->sym
== target_proc
13256 && target_proc
->attr
.used_in_submodule
)
13259 if (!gfc_check_new_interface (derived
->ns
->op
[op
],
13260 target_proc
, p
->where
))
13262 head
= derived
->ns
->op
[op
];
13263 intr
= gfc_get_interface ();
13264 intr
->sym
= target_proc
;
13265 intr
->where
= p
->where
;
13267 derived
->ns
->op
[op
] = intr
;
13279 /* Resolve a type-bound user operator (tree-walker callback). */
13281 static gfc_symbol
* resolve_bindings_derived
;
13282 static bool resolve_bindings_result
;
13284 static bool check_uop_procedure (gfc_symbol
* sym
, locus where
);
13287 resolve_typebound_user_op (gfc_symtree
* stree
)
13289 gfc_symbol
* super_type
;
13290 gfc_tbp_generic
* target
;
13292 gcc_assert (stree
&& stree
->n
.tb
);
13294 if (stree
->n
.tb
->error
)
13297 /* Operators should always be GENERIC bindings. */
13298 gcc_assert (stree
->n
.tb
->is_generic
);
13300 /* Find overridden procedure, if any. */
13301 super_type
= gfc_get_derived_super_type (resolve_bindings_derived
);
13302 if (super_type
&& super_type
->f2k_derived
)
13304 gfc_symtree
* overridden
;
13305 overridden
= gfc_find_typebound_user_op (super_type
, NULL
,
13306 stree
->name
, true, NULL
);
13308 if (overridden
&& overridden
->n
.tb
)
13309 stree
->n
.tb
->overridden
= overridden
->n
.tb
;
13312 stree
->n
.tb
->overridden
= NULL
;
13314 /* Resolve basically using worker function. */
13315 if (!resolve_tb_generic_targets (super_type
, stree
->n
.tb
, stree
->name
))
13318 /* Check the targets to be functions of correct interface. */
13319 for (target
= stree
->n
.tb
->u
.generic
; target
; target
= target
->next
)
13321 gfc_symbol
* target_proc
;
13323 target_proc
= get_checked_tb_operator_target (target
, stree
->n
.tb
->where
);
13327 if (!check_uop_procedure (target_proc
, stree
->n
.tb
->where
))
13334 resolve_bindings_result
= false;
13335 stree
->n
.tb
->error
= 1;
13339 /* Resolve the type-bound procedures for a derived type. */
13342 resolve_typebound_procedure (gfc_symtree
* stree
)
13346 gfc_symbol
* me_arg
;
13347 gfc_symbol
* super_type
;
13348 gfc_component
* comp
;
13350 gcc_assert (stree
);
13352 /* Undefined specific symbol from GENERIC target definition. */
13356 if (stree
->n
.tb
->error
)
13359 /* If this is a GENERIC binding, use that routine. */
13360 if (stree
->n
.tb
->is_generic
)
13362 if (!resolve_typebound_generic (resolve_bindings_derived
, stree
))
13367 /* Get the target-procedure to check it. */
13368 gcc_assert (!stree
->n
.tb
->is_generic
);
13369 gcc_assert (stree
->n
.tb
->u
.specific
);
13370 proc
= stree
->n
.tb
->u
.specific
->n
.sym
;
13371 where
= stree
->n
.tb
->where
;
13373 /* Default access should already be resolved from the parser. */
13374 gcc_assert (stree
->n
.tb
->access
!= ACCESS_UNKNOWN
);
13376 if (stree
->n
.tb
->deferred
)
13378 if (!check_proc_interface (proc
, &where
))
13383 /* Check for F08:C465. */
13384 if ((!proc
->attr
.subroutine
&& !proc
->attr
.function
)
13385 || (proc
->attr
.proc
!= PROC_MODULE
13386 && proc
->attr
.if_source
!= IFSRC_IFBODY
)
13387 || proc
->attr
.abstract
)
13389 gfc_error ("%qs must be a module procedure or an external procedure with"
13390 " an explicit interface at %L", proc
->name
, &where
);
13395 stree
->n
.tb
->subroutine
= proc
->attr
.subroutine
;
13396 stree
->n
.tb
->function
= proc
->attr
.function
;
13398 /* Find the super-type of the current derived type. We could do this once and
13399 store in a global if speed is needed, but as long as not I believe this is
13400 more readable and clearer. */
13401 super_type
= gfc_get_derived_super_type (resolve_bindings_derived
);
13403 /* If PASS, resolve and check arguments if not already resolved / loaded
13404 from a .mod file. */
13405 if (!stree
->n
.tb
->nopass
&& stree
->n
.tb
->pass_arg_num
== 0)
13407 gfc_formal_arglist
*dummy_args
;
13409 dummy_args
= gfc_sym_get_dummy_args (proc
);
13410 if (stree
->n
.tb
->pass_arg
)
13412 gfc_formal_arglist
*i
;
13414 /* If an explicit passing argument name is given, walk the arg-list
13415 and look for it. */
13418 stree
->n
.tb
->pass_arg_num
= 1;
13419 for (i
= dummy_args
; i
; i
= i
->next
)
13421 if (!strcmp (i
->sym
->name
, stree
->n
.tb
->pass_arg
))
13426 ++stree
->n
.tb
->pass_arg_num
;
13431 gfc_error ("Procedure %qs with PASS(%s) at %L has no"
13433 proc
->name
, stree
->n
.tb
->pass_arg
, &where
,
13434 stree
->n
.tb
->pass_arg
);
13440 /* Otherwise, take the first one; there should in fact be at least
13442 stree
->n
.tb
->pass_arg_num
= 1;
13445 gfc_error ("Procedure %qs with PASS at %L must have at"
13446 " least one argument", proc
->name
, &where
);
13449 me_arg
= dummy_args
->sym
;
13452 /* Now check that the argument-type matches and the passed-object
13453 dummy argument is generally fine. */
13455 gcc_assert (me_arg
);
13457 if (me_arg
->ts
.type
!= BT_CLASS
)
13459 gfc_error ("Non-polymorphic passed-object dummy argument of %qs"
13460 " at %L", proc
->name
, &where
);
13464 if (CLASS_DATA (me_arg
)->ts
.u
.derived
13465 != resolve_bindings_derived
)
13467 gfc_error ("Argument %qs of %qs with PASS(%s) at %L must be of"
13468 " the derived-type %qs", me_arg
->name
, proc
->name
,
13469 me_arg
->name
, &where
, resolve_bindings_derived
->name
);
13473 gcc_assert (me_arg
->ts
.type
== BT_CLASS
);
13474 if (CLASS_DATA (me_arg
)->as
&& CLASS_DATA (me_arg
)->as
->rank
!= 0)
13476 gfc_error ("Passed-object dummy argument of %qs at %L must be"
13477 " scalar", proc
->name
, &where
);
13480 if (CLASS_DATA (me_arg
)->attr
.allocatable
)
13482 gfc_error ("Passed-object dummy argument of %qs at %L must not"
13483 " be ALLOCATABLE", proc
->name
, &where
);
13486 if (CLASS_DATA (me_arg
)->attr
.class_pointer
)
13488 gfc_error ("Passed-object dummy argument of %qs at %L must not"
13489 " be POINTER", proc
->name
, &where
);
13494 /* If we are extending some type, check that we don't override a procedure
13495 flagged NON_OVERRIDABLE. */
13496 stree
->n
.tb
->overridden
= NULL
;
13499 gfc_symtree
* overridden
;
13500 overridden
= gfc_find_typebound_proc (super_type
, NULL
,
13501 stree
->name
, true, NULL
);
13505 if (overridden
->n
.tb
)
13506 stree
->n
.tb
->overridden
= overridden
->n
.tb
;
13508 if (!gfc_check_typebound_override (stree
, overridden
))
13513 /* See if there's a name collision with a component directly in this type. */
13514 for (comp
= resolve_bindings_derived
->components
; comp
; comp
= comp
->next
)
13515 if (!strcmp (comp
->name
, stree
->name
))
13517 gfc_error ("Procedure %qs at %L has the same name as a component of"
13519 stree
->name
, &where
, resolve_bindings_derived
->name
);
13523 /* Try to find a name collision with an inherited component. */
13524 if (super_type
&& gfc_find_component (super_type
, stree
->name
, true, true,
13527 gfc_error ("Procedure %qs at %L has the same name as an inherited"
13528 " component of %qs",
13529 stree
->name
, &where
, resolve_bindings_derived
->name
);
13533 stree
->n
.tb
->error
= 0;
13537 resolve_bindings_result
= false;
13538 stree
->n
.tb
->error
= 1;
13543 resolve_typebound_procedures (gfc_symbol
* derived
)
13546 gfc_symbol
* super_type
;
13548 if (!derived
->f2k_derived
|| !derived
->f2k_derived
->tb_sym_root
)
13551 super_type
= gfc_get_derived_super_type (derived
);
13553 resolve_symbol (super_type
);
13555 resolve_bindings_derived
= derived
;
13556 resolve_bindings_result
= true;
13558 if (derived
->f2k_derived
->tb_sym_root
)
13559 gfc_traverse_symtree (derived
->f2k_derived
->tb_sym_root
,
13560 &resolve_typebound_procedure
);
13562 if (derived
->f2k_derived
->tb_uop_root
)
13563 gfc_traverse_symtree (derived
->f2k_derived
->tb_uop_root
,
13564 &resolve_typebound_user_op
);
13566 for (op
= 0; op
!= GFC_INTRINSIC_OPS
; ++op
)
13568 gfc_typebound_proc
* p
= derived
->f2k_derived
->tb_op
[op
];
13569 if (p
&& !resolve_typebound_intrinsic_op (derived
,
13570 (gfc_intrinsic_op
)op
, p
))
13571 resolve_bindings_result
= false;
13574 return resolve_bindings_result
;
13578 /* Add a derived type to the dt_list. The dt_list is used in trans-types.c
13579 to give all identical derived types the same backend_decl. */
13581 add_dt_to_dt_list (gfc_symbol
*derived
)
13583 if (!derived
->dt_next
)
13585 if (gfc_derived_types
)
13587 derived
->dt_next
= gfc_derived_types
->dt_next
;
13588 gfc_derived_types
->dt_next
= derived
;
13592 derived
->dt_next
= derived
;
13594 gfc_derived_types
= derived
;
13599 /* Ensure that a derived-type is really not abstract, meaning that every
13600 inherited DEFERRED binding is overridden by a non-DEFERRED one. */
13603 ensure_not_abstract_walker (gfc_symbol
* sub
, gfc_symtree
* st
)
13608 if (!ensure_not_abstract_walker (sub
, st
->left
))
13610 if (!ensure_not_abstract_walker (sub
, st
->right
))
13613 if (st
->n
.tb
&& st
->n
.tb
->deferred
)
13615 gfc_symtree
* overriding
;
13616 overriding
= gfc_find_typebound_proc (sub
, NULL
, st
->name
, true, NULL
);
13619 gcc_assert (overriding
->n
.tb
);
13620 if (overriding
->n
.tb
->deferred
)
13622 gfc_error ("Derived-type %qs declared at %L must be ABSTRACT because"
13623 " %qs is DEFERRED and not overridden",
13624 sub
->name
, &sub
->declared_at
, st
->name
);
13633 ensure_not_abstract (gfc_symbol
* sub
, gfc_symbol
* ancestor
)
13635 /* The algorithm used here is to recursively travel up the ancestry of sub
13636 and for each ancestor-type, check all bindings. If any of them is
13637 DEFERRED, look it up starting from sub and see if the found (overriding)
13638 binding is not DEFERRED.
13639 This is not the most efficient way to do this, but it should be ok and is
13640 clearer than something sophisticated. */
13642 gcc_assert (ancestor
&& !sub
->attr
.abstract
);
13644 if (!ancestor
->attr
.abstract
)
13647 /* Walk bindings of this ancestor. */
13648 if (ancestor
->f2k_derived
)
13651 t
= ensure_not_abstract_walker (sub
, ancestor
->f2k_derived
->tb_sym_root
);
13656 /* Find next ancestor type and recurse on it. */
13657 ancestor
= gfc_get_derived_super_type (ancestor
);
13659 return ensure_not_abstract (sub
, ancestor
);
13665 /* This check for typebound defined assignments is done recursively
13666 since the order in which derived types are resolved is not always in
13667 order of the declarations. */
13670 check_defined_assignments (gfc_symbol
*derived
)
13674 for (c
= derived
->components
; c
; c
= c
->next
)
13676 if (!gfc_bt_struct (c
->ts
.type
)
13678 || c
->attr
.allocatable
13679 || c
->attr
.proc_pointer_comp
13680 || c
->attr
.class_pointer
13681 || c
->attr
.proc_pointer
)
13684 if (c
->ts
.u
.derived
->attr
.defined_assign_comp
13685 || (c
->ts
.u
.derived
->f2k_derived
13686 && c
->ts
.u
.derived
->f2k_derived
->tb_op
[INTRINSIC_ASSIGN
]))
13688 derived
->attr
.defined_assign_comp
= 1;
13692 check_defined_assignments (c
->ts
.u
.derived
);
13693 if (c
->ts
.u
.derived
->attr
.defined_assign_comp
)
13695 derived
->attr
.defined_assign_comp
= 1;
13702 /* Resolve a single component of a derived type or structure. */
13705 resolve_component (gfc_component
*c
, gfc_symbol
*sym
)
13707 gfc_symbol
*super_type
;
13709 if (c
->attr
.artificial
)
13712 /* Do not allow vtype components to be resolved in nameless namespaces
13713 such as block data because the procedure pointers will cause ICEs
13714 and vtables are not needed in these contexts. */
13715 if (sym
->attr
.vtype
&& sym
->attr
.use_assoc
13716 && sym
->ns
->proc_name
== NULL
)
13720 if ((!sym
->attr
.is_class
|| c
!= sym
->components
)
13721 && c
->attr
.codimension
13722 && (!c
->attr
.allocatable
|| (c
->as
&& c
->as
->type
!= AS_DEFERRED
)))
13724 gfc_error ("Coarray component %qs at %L must be allocatable with "
13725 "deferred shape", c
->name
, &c
->loc
);
13730 if (c
->attr
.codimension
&& c
->ts
.type
== BT_DERIVED
13731 && c
->ts
.u
.derived
->ts
.is_iso_c
)
13733 gfc_error ("Component %qs at %L of TYPE(C_PTR) or TYPE(C_FUNPTR) "
13734 "shall not be a coarray", c
->name
, &c
->loc
);
13739 if (gfc_bt_struct (c
->ts
.type
) && c
->ts
.u
.derived
->attr
.coarray_comp
13740 && (c
->attr
.codimension
|| c
->attr
.pointer
|| c
->attr
.dimension
13741 || c
->attr
.allocatable
))
13743 gfc_error ("Component %qs at %L with coarray component "
13744 "shall be a nonpointer, nonallocatable scalar",
13750 if (c
->attr
.contiguous
&& (!c
->attr
.dimension
|| !c
->attr
.pointer
))
13752 gfc_error ("Component %qs at %L has the CONTIGUOUS attribute but "
13753 "is not an array pointer", c
->name
, &c
->loc
);
13757 /* F2003, 15.2.1 - length has to be one. */
13758 if (sym
->attr
.is_bind_c
&& c
->ts
.type
== BT_CHARACTER
13759 && (c
->ts
.u
.cl
== NULL
|| c
->ts
.u
.cl
->length
== NULL
13760 || !gfc_is_constant_expr (c
->ts
.u
.cl
->length
)
13761 || mpz_cmp_si (c
->ts
.u
.cl
->length
->value
.integer
, 1) != 0))
13763 gfc_error ("Component %qs of BIND(C) type at %L must have length one",
13768 if (c
->attr
.proc_pointer
&& c
->ts
.interface
)
13770 gfc_symbol
*ifc
= c
->ts
.interface
;
13772 if (!sym
->attr
.vtype
&& !check_proc_interface (ifc
, &c
->loc
))
13778 if (ifc
->attr
.if_source
|| ifc
->attr
.intrinsic
)
13780 /* Resolve interface and copy attributes. */
13781 if (ifc
->formal
&& !ifc
->formal_ns
)
13782 resolve_symbol (ifc
);
13783 if (ifc
->attr
.intrinsic
)
13784 gfc_resolve_intrinsic (ifc
, &ifc
->declared_at
);
13788 c
->ts
= ifc
->result
->ts
;
13789 c
->attr
.allocatable
= ifc
->result
->attr
.allocatable
;
13790 c
->attr
.pointer
= ifc
->result
->attr
.pointer
;
13791 c
->attr
.dimension
= ifc
->result
->attr
.dimension
;
13792 c
->as
= gfc_copy_array_spec (ifc
->result
->as
);
13793 c
->attr
.class_ok
= ifc
->result
->attr
.class_ok
;
13798 c
->attr
.allocatable
= ifc
->attr
.allocatable
;
13799 c
->attr
.pointer
= ifc
->attr
.pointer
;
13800 c
->attr
.dimension
= ifc
->attr
.dimension
;
13801 c
->as
= gfc_copy_array_spec (ifc
->as
);
13802 c
->attr
.class_ok
= ifc
->attr
.class_ok
;
13804 c
->ts
.interface
= ifc
;
13805 c
->attr
.function
= ifc
->attr
.function
;
13806 c
->attr
.subroutine
= ifc
->attr
.subroutine
;
13808 c
->attr
.pure
= ifc
->attr
.pure
;
13809 c
->attr
.elemental
= ifc
->attr
.elemental
;
13810 c
->attr
.recursive
= ifc
->attr
.recursive
;
13811 c
->attr
.always_explicit
= ifc
->attr
.always_explicit
;
13812 c
->attr
.ext_attr
|= ifc
->attr
.ext_attr
;
13813 /* Copy char length. */
13814 if (ifc
->ts
.type
== BT_CHARACTER
&& ifc
->ts
.u
.cl
)
13816 gfc_charlen
*cl
= gfc_new_charlen (sym
->ns
, ifc
->ts
.u
.cl
);
13817 if (cl
->length
&& !cl
->resolved
13818 && !gfc_resolve_expr (cl
->length
))
13827 else if (c
->attr
.proc_pointer
&& c
->ts
.type
== BT_UNKNOWN
)
13829 /* Since PPCs are not implicitly typed, a PPC without an explicit
13830 interface must be a subroutine. */
13831 gfc_add_subroutine (&c
->attr
, c
->name
, &c
->loc
);
13834 /* Procedure pointer components: Check PASS arg. */
13835 if (c
->attr
.proc_pointer
&& !c
->tb
->nopass
&& c
->tb
->pass_arg_num
== 0
13836 && !sym
->attr
.vtype
)
13838 gfc_symbol
* me_arg
;
13840 if (c
->tb
->pass_arg
)
13842 gfc_formal_arglist
* i
;
13844 /* If an explicit passing argument name is given, walk the arg-list
13845 and look for it. */
13848 c
->tb
->pass_arg_num
= 1;
13849 for (i
= c
->ts
.interface
->formal
; i
; i
= i
->next
)
13851 if (!strcmp (i
->sym
->name
, c
->tb
->pass_arg
))
13856 c
->tb
->pass_arg_num
++;
13861 gfc_error ("Procedure pointer component %qs with PASS(%s) "
13862 "at %L has no argument %qs", c
->name
,
13863 c
->tb
->pass_arg
, &c
->loc
, c
->tb
->pass_arg
);
13870 /* Otherwise, take the first one; there should in fact be at least
13872 c
->tb
->pass_arg_num
= 1;
13873 if (!c
->ts
.interface
->formal
)
13875 gfc_error ("Procedure pointer component %qs with PASS at %L "
13876 "must have at least one argument",
13881 me_arg
= c
->ts
.interface
->formal
->sym
;
13884 /* Now check that the argument-type matches. */
13885 gcc_assert (me_arg
);
13886 if ((me_arg
->ts
.type
!= BT_DERIVED
&& me_arg
->ts
.type
!= BT_CLASS
)
13887 || (me_arg
->ts
.type
== BT_DERIVED
&& me_arg
->ts
.u
.derived
!= sym
)
13888 || (me_arg
->ts
.type
== BT_CLASS
13889 && CLASS_DATA (me_arg
)->ts
.u
.derived
!= sym
))
13891 gfc_error ("Argument %qs of %qs with PASS(%s) at %L must be of"
13892 " the derived type %qs", me_arg
->name
, c
->name
,
13893 me_arg
->name
, &c
->loc
, sym
->name
);
13898 /* Check for F03:C453. */
13899 if (CLASS_DATA (me_arg
)->attr
.dimension
)
13901 gfc_error ("Argument %qs of %qs with PASS(%s) at %L "
13902 "must be scalar", me_arg
->name
, c
->name
, me_arg
->name
,
13908 if (CLASS_DATA (me_arg
)->attr
.class_pointer
)
13910 gfc_error ("Argument %qs of %qs with PASS(%s) at %L "
13911 "may not have the POINTER attribute", me_arg
->name
,
13912 c
->name
, me_arg
->name
, &c
->loc
);
13917 if (CLASS_DATA (me_arg
)->attr
.allocatable
)
13919 gfc_error ("Argument %qs of %qs with PASS(%s) at %L "
13920 "may not be ALLOCATABLE", me_arg
->name
, c
->name
,
13921 me_arg
->name
, &c
->loc
);
13926 if (gfc_type_is_extensible (sym
) && me_arg
->ts
.type
!= BT_CLASS
)
13928 gfc_error ("Non-polymorphic passed-object dummy argument of %qs"
13929 " at %L", c
->name
, &c
->loc
);
13935 /* Check type-spec if this is not the parent-type component. */
13936 if (((sym
->attr
.is_class
13937 && (!sym
->components
->ts
.u
.derived
->attr
.extension
13938 || c
!= sym
->components
->ts
.u
.derived
->components
))
13939 || (!sym
->attr
.is_class
13940 && (!sym
->attr
.extension
|| c
!= sym
->components
)))
13941 && !sym
->attr
.vtype
13942 && !resolve_typespec_used (&c
->ts
, &c
->loc
, c
->name
))
13945 super_type
= gfc_get_derived_super_type (sym
);
13947 /* If this type is an extension, set the accessibility of the parent
13950 && ((sym
->attr
.is_class
13951 && c
== sym
->components
->ts
.u
.derived
->components
)
13952 || (!sym
->attr
.is_class
&& c
== sym
->components
))
13953 && strcmp (super_type
->name
, c
->name
) == 0)
13954 c
->attr
.access
= super_type
->attr
.access
;
13956 /* If this type is an extension, see if this component has the same name
13957 as an inherited type-bound procedure. */
13958 if (super_type
&& !sym
->attr
.is_class
13959 && gfc_find_typebound_proc (super_type
, NULL
, c
->name
, true, NULL
))
13961 gfc_error ("Component %qs of %qs at %L has the same name as an"
13962 " inherited type-bound procedure",
13963 c
->name
, sym
->name
, &c
->loc
);
13967 if (c
->ts
.type
== BT_CHARACTER
&& !c
->attr
.proc_pointer
13968 && !c
->ts
.deferred
)
13970 if (c
->ts
.u
.cl
->length
== NULL
13971 || (!resolve_charlen(c
->ts
.u
.cl
))
13972 || !gfc_is_constant_expr (c
->ts
.u
.cl
->length
))
13974 gfc_error ("Character length of component %qs needs to "
13975 "be a constant specification expression at %L",
13977 c
->ts
.u
.cl
->length
? &c
->ts
.u
.cl
->length
->where
: &c
->loc
);
13982 if (c
->ts
.type
== BT_CHARACTER
&& c
->ts
.deferred
13983 && !c
->attr
.pointer
&& !c
->attr
.allocatable
)
13985 gfc_error ("Character component %qs of %qs at %L with deferred "
13986 "length must be a POINTER or ALLOCATABLE",
13987 c
->name
, sym
->name
, &c
->loc
);
13991 /* Add the hidden deferred length field. */
13992 if (c
->ts
.type
== BT_CHARACTER
13993 && (c
->ts
.deferred
|| c
->attr
.pdt_string
)
13994 && !c
->attr
.function
13995 && !sym
->attr
.is_class
)
13997 char name
[GFC_MAX_SYMBOL_LEN
+9];
13998 gfc_component
*strlen
;
13999 sprintf (name
, "_%s_length", c
->name
);
14000 strlen
= gfc_find_component (sym
, name
, true, true, NULL
);
14001 if (strlen
== NULL
)
14003 if (!gfc_add_component (sym
, name
, &strlen
))
14005 strlen
->ts
.type
= BT_INTEGER
;
14006 strlen
->ts
.kind
= gfc_charlen_int_kind
;
14007 strlen
->attr
.access
= ACCESS_PRIVATE
;
14008 strlen
->attr
.artificial
= 1;
14012 if (c
->ts
.type
== BT_DERIVED
14013 && sym
->component_access
!= ACCESS_PRIVATE
14014 && gfc_check_symbol_access (sym
)
14015 && !is_sym_host_assoc (c
->ts
.u
.derived
, sym
->ns
)
14016 && !c
->ts
.u
.derived
->attr
.use_assoc
14017 && !gfc_check_symbol_access (c
->ts
.u
.derived
)
14018 && !gfc_notify_std (GFC_STD_F2003
, "the component %qs is a "
14019 "PRIVATE type and cannot be a component of "
14020 "%qs, which is PUBLIC at %L", c
->name
,
14021 sym
->name
, &sym
->declared_at
))
14024 if ((sym
->attr
.sequence
|| sym
->attr
.is_bind_c
) && c
->ts
.type
== BT_CLASS
)
14026 gfc_error ("Polymorphic component %s at %L in SEQUENCE or BIND(C) "
14027 "type %s", c
->name
, &c
->loc
, sym
->name
);
14031 if (sym
->attr
.sequence
)
14033 if (c
->ts
.type
== BT_DERIVED
&& c
->ts
.u
.derived
->attr
.sequence
== 0)
14035 gfc_error ("Component %s of SEQUENCE type declared at %L does "
14036 "not have the SEQUENCE attribute",
14037 c
->ts
.u
.derived
->name
, &sym
->declared_at
);
14042 if (c
->ts
.type
== BT_DERIVED
&& c
->ts
.u
.derived
->attr
.generic
)
14043 c
->ts
.u
.derived
= gfc_find_dt_in_generic (c
->ts
.u
.derived
);
14044 else if (c
->ts
.type
== BT_CLASS
&& c
->attr
.class_ok
14045 && CLASS_DATA (c
)->ts
.u
.derived
->attr
.generic
)
14046 CLASS_DATA (c
)->ts
.u
.derived
14047 = gfc_find_dt_in_generic (CLASS_DATA (c
)->ts
.u
.derived
);
14049 /* If an allocatable component derived type is of the same type as
14050 the enclosing derived type, we need a vtable generating so that
14051 the __deallocate procedure is created. */
14052 if ((c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
14053 && c
->ts
.u
.derived
== sym
&& c
->attr
.allocatable
== 1)
14054 gfc_find_vtab (&c
->ts
);
14056 /* Ensure that all the derived type components are put on the
14057 derived type list; even in formal namespaces, where derived type
14058 pointer components might not have been declared. */
14059 if (c
->ts
.type
== BT_DERIVED
14061 && c
->ts
.u
.derived
->components
14063 && sym
!= c
->ts
.u
.derived
)
14064 add_dt_to_dt_list (c
->ts
.u
.derived
);
14066 if (!gfc_resolve_array_spec (c
->as
,
14067 !(c
->attr
.pointer
|| c
->attr
.proc_pointer
14068 || c
->attr
.allocatable
)))
14071 if (c
->initializer
&& !sym
->attr
.vtype
14072 && !c
->attr
.pdt_kind
&& !c
->attr
.pdt_len
14073 && !gfc_check_assign_symbol (sym
, c
, c
->initializer
))
14080 /* Be nice about the locus for a structure expression - show the locus of the
14081 first non-null sub-expression if we can. */
14084 cons_where (gfc_expr
*struct_expr
)
14086 gfc_constructor
*cons
;
14088 gcc_assert (struct_expr
&& struct_expr
->expr_type
== EXPR_STRUCTURE
);
14090 cons
= gfc_constructor_first (struct_expr
->value
.constructor
);
14091 for (; cons
; cons
= gfc_constructor_next (cons
))
14093 if (cons
->expr
&& cons
->expr
->expr_type
!= EXPR_NULL
)
14094 return &cons
->expr
->where
;
14097 return &struct_expr
->where
;
14100 /* Resolve the components of a structure type. Much less work than derived
14104 resolve_fl_struct (gfc_symbol
*sym
)
14107 gfc_expr
*init
= NULL
;
14110 /* Make sure UNIONs do not have overlapping initializers. */
14111 if (sym
->attr
.flavor
== FL_UNION
)
14113 for (c
= sym
->components
; c
; c
= c
->next
)
14115 if (init
&& c
->initializer
)
14117 gfc_error ("Conflicting initializers in union at %L and %L",
14118 cons_where (init
), cons_where (c
->initializer
));
14119 gfc_free_expr (c
->initializer
);
14120 c
->initializer
= NULL
;
14123 init
= c
->initializer
;
14128 for (c
= sym
->components
; c
; c
= c
->next
)
14129 if (!resolve_component (c
, sym
))
14135 if (sym
->components
)
14136 add_dt_to_dt_list (sym
);
14142 /* Resolve the components of a derived type. This does not have to wait until
14143 resolution stage, but can be done as soon as the dt declaration has been
14147 resolve_fl_derived0 (gfc_symbol
*sym
)
14149 gfc_symbol
* super_type
;
14151 gfc_formal_arglist
*f
;
14154 if (sym
->attr
.unlimited_polymorphic
)
14157 super_type
= gfc_get_derived_super_type (sym
);
14160 if (super_type
&& sym
->attr
.coarray_comp
&& !super_type
->attr
.coarray_comp
)
14162 gfc_error ("As extending type %qs at %L has a coarray component, "
14163 "parent type %qs shall also have one", sym
->name
,
14164 &sym
->declared_at
, super_type
->name
);
14168 /* Ensure the extended type gets resolved before we do. */
14169 if (super_type
&& !resolve_fl_derived0 (super_type
))
14172 /* An ABSTRACT type must be extensible. */
14173 if (sym
->attr
.abstract
&& !gfc_type_is_extensible (sym
))
14175 gfc_error ("Non-extensible derived-type %qs at %L must not be ABSTRACT",
14176 sym
->name
, &sym
->declared_at
);
14180 c
= (sym
->attr
.is_class
) ? sym
->components
->ts
.u
.derived
->components
14184 for ( ; c
!= NULL
; c
= c
->next
)
14185 if (!resolve_component (c
, sym
))
14191 /* Now add the caf token field, where needed. */
14192 if (flag_coarray
!= GFC_FCOARRAY_NONE
14193 && !sym
->attr
.is_class
&& !sym
->attr
.vtype
)
14195 for (c
= sym
->components
; c
; c
= c
->next
)
14196 if (!c
->attr
.dimension
&& !c
->attr
.codimension
14197 && (c
->attr
.allocatable
|| c
->attr
.pointer
))
14199 char name
[GFC_MAX_SYMBOL_LEN
+9];
14200 gfc_component
*token
;
14201 sprintf (name
, "_caf_%s", c
->name
);
14202 token
= gfc_find_component (sym
, name
, true, true, NULL
);
14205 if (!gfc_add_component (sym
, name
, &token
))
14207 token
->ts
.type
= BT_VOID
;
14208 token
->ts
.kind
= gfc_default_integer_kind
;
14209 token
->attr
.access
= ACCESS_PRIVATE
;
14210 token
->attr
.artificial
= 1;
14211 token
->attr
.caf_token
= 1;
14216 check_defined_assignments (sym
);
14218 if (!sym
->attr
.defined_assign_comp
&& super_type
)
14219 sym
->attr
.defined_assign_comp
14220 = super_type
->attr
.defined_assign_comp
;
14222 /* If this is a non-ABSTRACT type extending an ABSTRACT one, ensure that
14223 all DEFERRED bindings are overridden. */
14224 if (super_type
&& super_type
->attr
.abstract
&& !sym
->attr
.abstract
14225 && !sym
->attr
.is_class
14226 && !ensure_not_abstract (sym
, super_type
))
14229 /* Check that there is a component for every PDT parameter. */
14230 if (sym
->attr
.pdt_template
)
14232 for (f
= sym
->formal
; f
; f
= f
->next
)
14236 c
= gfc_find_component (sym
, f
->sym
->name
, true, true, NULL
);
14239 gfc_error ("Parameterized type %qs does not have a component "
14240 "corresponding to parameter %qs at %L", sym
->name
,
14241 f
->sym
->name
, &sym
->declared_at
);
14247 /* Add derived type to the derived type list. */
14248 add_dt_to_dt_list (sym
);
14254 /* The following procedure does the full resolution of a derived type,
14255 including resolution of all type-bound procedures (if present). In contrast
14256 to 'resolve_fl_derived0' this can only be done after the module has been
14257 parsed completely. */
14260 resolve_fl_derived (gfc_symbol
*sym
)
14262 gfc_symbol
*gen_dt
= NULL
;
14264 if (sym
->attr
.unlimited_polymorphic
)
14267 if (!sym
->attr
.is_class
)
14268 gfc_find_symbol (sym
->name
, sym
->ns
, 0, &gen_dt
);
14269 if (gen_dt
&& gen_dt
->generic
&& gen_dt
->generic
->next
14270 && (!gen_dt
->generic
->sym
->attr
.use_assoc
14271 || gen_dt
->generic
->sym
->module
!= gen_dt
->generic
->next
->sym
->module
)
14272 && !gfc_notify_std (GFC_STD_F2003
, "Generic name %qs of function "
14273 "%qs at %L being the same name as derived "
14274 "type at %L", sym
->name
,
14275 gen_dt
->generic
->sym
== sym
14276 ? gen_dt
->generic
->next
->sym
->name
14277 : gen_dt
->generic
->sym
->name
,
14278 gen_dt
->generic
->sym
== sym
14279 ? &gen_dt
->generic
->next
->sym
->declared_at
14280 : &gen_dt
->generic
->sym
->declared_at
,
14281 &sym
->declared_at
))
14284 if (sym
->components
== NULL
&& !sym
->attr
.zero_comp
&& !sym
->attr
.use_assoc
)
14286 gfc_error ("Derived type %qs at %L has not been declared",
14287 sym
->name
, &sym
->declared_at
);
14291 /* Resolve the finalizer procedures. */
14292 if (!gfc_resolve_finalizers (sym
, NULL
))
14295 if (sym
->attr
.is_class
&& sym
->ts
.u
.derived
== NULL
)
14297 /* Fix up incomplete CLASS symbols. */
14298 gfc_component
*data
= gfc_find_component (sym
, "_data", true, true, NULL
);
14299 gfc_component
*vptr
= gfc_find_component (sym
, "_vptr", true, true, NULL
);
14301 /* Nothing more to do for unlimited polymorphic entities. */
14302 if (data
->ts
.u
.derived
->attr
.unlimited_polymorphic
)
14304 else if (vptr
->ts
.u
.derived
== NULL
)
14306 gfc_symbol
*vtab
= gfc_find_derived_vtab (data
->ts
.u
.derived
);
14308 vptr
->ts
.u
.derived
= vtab
->ts
.u
.derived
;
14309 if (!resolve_fl_derived0 (vptr
->ts
.u
.derived
))
14314 if (!resolve_fl_derived0 (sym
))
14317 /* Resolve the type-bound procedures. */
14318 if (!resolve_typebound_procedures (sym
))
14321 /* Generate module vtables subject to their accessibility and their not
14322 being vtables or pdt templates. If this is not done class declarations
14323 in external procedures wind up with their own version and so SELECT TYPE
14324 fails because the vptrs do not have the same address. */
14325 if (gfc_option
.allow_std
& GFC_STD_F2003
14326 && sym
->ns
->proc_name
14327 && sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
14328 && sym
->attr
.access
!= ACCESS_PRIVATE
14329 && !(sym
->attr
.use_assoc
|| sym
->attr
.vtype
|| sym
->attr
.pdt_template
))
14331 gfc_symbol
*vtab
= gfc_find_derived_vtab (sym
);
14332 gfc_set_sym_referenced (vtab
);
14340 resolve_fl_namelist (gfc_symbol
*sym
)
14345 for (nl
= sym
->namelist
; nl
; nl
= nl
->next
)
14347 /* Check again, the check in match only works if NAMELIST comes
14349 if (nl
->sym
->as
&& nl
->sym
->as
->type
== AS_ASSUMED_SIZE
)
14351 gfc_error ("Assumed size array %qs in namelist %qs at %L is not "
14352 "allowed", nl
->sym
->name
, sym
->name
, &sym
->declared_at
);
14356 if (nl
->sym
->as
&& nl
->sym
->as
->type
== AS_ASSUMED_SHAPE
14357 && !gfc_notify_std (GFC_STD_F2003
, "NAMELIST array object %qs "
14358 "with assumed shape in namelist %qs at %L",
14359 nl
->sym
->name
, sym
->name
, &sym
->declared_at
))
14362 if (is_non_constant_shape_array (nl
->sym
)
14363 && !gfc_notify_std (GFC_STD_F2003
, "NAMELIST array object %qs "
14364 "with nonconstant shape in namelist %qs at %L",
14365 nl
->sym
->name
, sym
->name
, &sym
->declared_at
))
14368 if (nl
->sym
->ts
.type
== BT_CHARACTER
14369 && (nl
->sym
->ts
.u
.cl
->length
== NULL
14370 || !gfc_is_constant_expr (nl
->sym
->ts
.u
.cl
->length
))
14371 && !gfc_notify_std (GFC_STD_F2003
, "NAMELIST object %qs with "
14372 "nonconstant character length in "
14373 "namelist %qs at %L", nl
->sym
->name
,
14374 sym
->name
, &sym
->declared_at
))
14379 /* Reject PRIVATE objects in a PUBLIC namelist. */
14380 if (gfc_check_symbol_access (sym
))
14382 for (nl
= sym
->namelist
; nl
; nl
= nl
->next
)
14384 if (!nl
->sym
->attr
.use_assoc
14385 && !is_sym_host_assoc (nl
->sym
, sym
->ns
)
14386 && !gfc_check_symbol_access (nl
->sym
))
14388 gfc_error ("NAMELIST object %qs was declared PRIVATE and "
14389 "cannot be member of PUBLIC namelist %qs at %L",
14390 nl
->sym
->name
, sym
->name
, &sym
->declared_at
);
14394 if (nl
->sym
->ts
.type
== BT_DERIVED
14395 && (nl
->sym
->ts
.u
.derived
->attr
.alloc_comp
14396 || nl
->sym
->ts
.u
.derived
->attr
.pointer_comp
))
14398 if (!gfc_notify_std (GFC_STD_F2003
, "NAMELIST object %qs in "
14399 "namelist %qs at %L with ALLOCATABLE "
14400 "or POINTER components", nl
->sym
->name
,
14401 sym
->name
, &sym
->declared_at
))
14406 /* Types with private components that came here by USE-association. */
14407 if (nl
->sym
->ts
.type
== BT_DERIVED
14408 && derived_inaccessible (nl
->sym
->ts
.u
.derived
))
14410 gfc_error ("NAMELIST object %qs has use-associated PRIVATE "
14411 "components and cannot be member of namelist %qs at %L",
14412 nl
->sym
->name
, sym
->name
, &sym
->declared_at
);
14416 /* Types with private components that are defined in the same module. */
14417 if (nl
->sym
->ts
.type
== BT_DERIVED
14418 && !is_sym_host_assoc (nl
->sym
->ts
.u
.derived
, sym
->ns
)
14419 && nl
->sym
->ts
.u
.derived
->attr
.private_comp
)
14421 gfc_error ("NAMELIST object %qs has PRIVATE components and "
14422 "cannot be a member of PUBLIC namelist %qs at %L",
14423 nl
->sym
->name
, sym
->name
, &sym
->declared_at
);
14430 /* 14.1.2 A module or internal procedure represent local entities
14431 of the same type as a namelist member and so are not allowed. */
14432 for (nl
= sym
->namelist
; nl
; nl
= nl
->next
)
14434 if (nl
->sym
->ts
.kind
!= 0 && nl
->sym
->attr
.flavor
== FL_VARIABLE
)
14437 if (nl
->sym
->attr
.function
&& nl
->sym
== nl
->sym
->result
)
14438 if ((nl
->sym
== sym
->ns
->proc_name
)
14440 (sym
->ns
->parent
&& nl
->sym
== sym
->ns
->parent
->proc_name
))
14445 gfc_find_symbol (nl
->sym
->name
, sym
->ns
, 1, &nlsym
);
14446 if (nlsym
&& nlsym
->attr
.flavor
== FL_PROCEDURE
)
14448 gfc_error ("PROCEDURE attribute conflicts with NAMELIST "
14449 "attribute in %qs at %L", nlsym
->name
,
14450 &sym
->declared_at
);
14457 for (nl
= sym
->namelist
; nl
; nl
= nl
->next
)
14458 nl
->sym
->attr
.asynchronous
= 1;
14465 resolve_fl_parameter (gfc_symbol
*sym
)
14467 /* A parameter array's shape needs to be constant. */
14468 if (sym
->as
!= NULL
14469 && (sym
->as
->type
== AS_DEFERRED
14470 || is_non_constant_shape_array (sym
)))
14472 gfc_error ("Parameter array %qs at %L cannot be automatic "
14473 "or of deferred shape", sym
->name
, &sym
->declared_at
);
14477 /* Constraints on deferred type parameter. */
14478 if (!deferred_requirements (sym
))
14481 /* Make sure a parameter that has been implicitly typed still
14482 matches the implicit type, since PARAMETER statements can precede
14483 IMPLICIT statements. */
14484 if (sym
->attr
.implicit_type
14485 && !gfc_compare_types (&sym
->ts
, gfc_get_default_type (sym
->name
,
14488 gfc_error ("Implicitly typed PARAMETER %qs at %L doesn't match a "
14489 "later IMPLICIT type", sym
->name
, &sym
->declared_at
);
14493 /* Make sure the types of derived parameters are consistent. This
14494 type checking is deferred until resolution because the type may
14495 refer to a derived type from the host. */
14496 if (sym
->ts
.type
== BT_DERIVED
14497 && !gfc_compare_types (&sym
->ts
, &sym
->value
->ts
))
14499 gfc_error ("Incompatible derived type in PARAMETER at %L",
14500 &sym
->value
->where
);
14504 /* F03:C509,C514. */
14505 if (sym
->ts
.type
== BT_CLASS
)
14507 gfc_error ("CLASS variable %qs at %L cannot have the PARAMETER attribute",
14508 sym
->name
, &sym
->declared_at
);
14516 /* Called by resolve_symbol to check PDTs. */
14519 resolve_pdt (gfc_symbol
* sym
)
14521 gfc_symbol
*derived
= NULL
;
14522 gfc_actual_arglist
*param
;
14524 bool const_len_exprs
= true;
14525 bool assumed_len_exprs
= false;
14526 symbol_attribute
*attr
;
14528 if (sym
->ts
.type
== BT_DERIVED
)
14530 derived
= sym
->ts
.u
.derived
;
14531 attr
= &(sym
->attr
);
14533 else if (sym
->ts
.type
== BT_CLASS
)
14535 derived
= CLASS_DATA (sym
)->ts
.u
.derived
;
14536 attr
= &(CLASS_DATA (sym
)->attr
);
14539 gcc_unreachable ();
14541 gcc_assert (derived
->attr
.pdt_type
);
14543 for (param
= sym
->param_list
; param
; param
= param
->next
)
14545 c
= gfc_find_component (derived
, param
->name
, false, true, NULL
);
14547 if (c
->attr
.pdt_kind
)
14550 if (param
->expr
&& !gfc_is_constant_expr (param
->expr
)
14551 && c
->attr
.pdt_len
)
14552 const_len_exprs
= false;
14553 else if (param
->spec_type
== SPEC_ASSUMED
)
14554 assumed_len_exprs
= true;
14556 if (param
->spec_type
== SPEC_DEFERRED
14557 && !attr
->allocatable
&& !attr
->pointer
)
14558 gfc_error ("The object %qs at %L has a deferred LEN "
14559 "parameter %qs and is neither allocatable "
14560 "nor a pointer", sym
->name
, &sym
->declared_at
,
14565 if (!const_len_exprs
14566 && (sym
->ns
->proc_name
->attr
.is_main_program
14567 || sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
14568 || sym
->attr
.save
!= SAVE_NONE
))
14569 gfc_error ("The AUTOMATIC object %qs at %L must not have the "
14570 "SAVE attribute or be a variable declared in the "
14571 "main program, a module or a submodule(F08/C513)",
14572 sym
->name
, &sym
->declared_at
);
14574 if (assumed_len_exprs
&& !(sym
->attr
.dummy
14575 || sym
->attr
.select_type_temporary
|| sym
->attr
.associate_var
))
14576 gfc_error ("The object %qs at %L with ASSUMED type parameters "
14577 "must be a dummy or a SELECT TYPE selector(F08/4.2)",
14578 sym
->name
, &sym
->declared_at
);
14582 /* Do anything necessary to resolve a symbol. Right now, we just
14583 assume that an otherwise unknown symbol is a variable. This sort
14584 of thing commonly happens for symbols in module. */
14587 resolve_symbol (gfc_symbol
*sym
)
14589 int check_constant
, mp_flag
;
14590 gfc_symtree
*symtree
;
14591 gfc_symtree
*this_symtree
;
14594 symbol_attribute class_attr
;
14595 gfc_array_spec
*as
;
14596 bool saved_specification_expr
;
14602 /* No symbol will ever have union type; only components can be unions.
14603 Union type declaration symbols have type BT_UNKNOWN but flavor FL_UNION
14604 (just like derived type declaration symbols have flavor FL_DERIVED). */
14605 gcc_assert (sym
->ts
.type
!= BT_UNION
);
14607 /* Coarrayed polymorphic objects with allocatable or pointer components are
14608 yet unsupported for -fcoarray=lib. */
14609 if (flag_coarray
== GFC_FCOARRAY_LIB
&& sym
->ts
.type
== BT_CLASS
14610 && sym
->ts
.u
.derived
&& CLASS_DATA (sym
)
14611 && CLASS_DATA (sym
)->attr
.codimension
14612 && (CLASS_DATA (sym
)->ts
.u
.derived
->attr
.alloc_comp
14613 || CLASS_DATA (sym
)->ts
.u
.derived
->attr
.pointer_comp
))
14615 gfc_error ("Sorry, allocatable/pointer components in polymorphic (CLASS) "
14616 "type coarrays at %L are unsupported", &sym
->declared_at
);
14620 if (sym
->attr
.artificial
)
14623 if (sym
->attr
.unlimited_polymorphic
)
14626 if (sym
->attr
.flavor
== FL_UNKNOWN
14627 || (sym
->attr
.flavor
== FL_PROCEDURE
&& !sym
->attr
.intrinsic
14628 && !sym
->attr
.generic
&& !sym
->attr
.external
14629 && sym
->attr
.if_source
== IFSRC_UNKNOWN
14630 && sym
->ts
.type
== BT_UNKNOWN
))
14633 /* If we find that a flavorless symbol is an interface in one of the
14634 parent namespaces, find its symtree in this namespace, free the
14635 symbol and set the symtree to point to the interface symbol. */
14636 for (ns
= gfc_current_ns
->parent
; ns
; ns
= ns
->parent
)
14638 symtree
= gfc_find_symtree (ns
->sym_root
, sym
->name
);
14639 if (symtree
&& (symtree
->n
.sym
->generic
||
14640 (symtree
->n
.sym
->attr
.flavor
== FL_PROCEDURE
14641 && sym
->ns
->construct_entities
)))
14643 this_symtree
= gfc_find_symtree (gfc_current_ns
->sym_root
,
14645 if (this_symtree
->n
.sym
== sym
)
14647 symtree
->n
.sym
->refs
++;
14648 gfc_release_symbol (sym
);
14649 this_symtree
->n
.sym
= symtree
->n
.sym
;
14655 /* Otherwise give it a flavor according to such attributes as
14657 if (sym
->attr
.flavor
== FL_UNKNOWN
&& sym
->attr
.external
== 0
14658 && sym
->attr
.intrinsic
== 0)
14659 sym
->attr
.flavor
= FL_VARIABLE
;
14660 else if (sym
->attr
.flavor
== FL_UNKNOWN
)
14662 sym
->attr
.flavor
= FL_PROCEDURE
;
14663 if (sym
->attr
.dimension
)
14664 sym
->attr
.function
= 1;
14668 if (sym
->attr
.external
&& sym
->ts
.type
!= BT_UNKNOWN
&& !sym
->attr
.function
)
14669 gfc_add_function (&sym
->attr
, sym
->name
, &sym
->declared_at
);
14671 if (sym
->attr
.procedure
&& sym
->attr
.if_source
!= IFSRC_DECL
14672 && !resolve_procedure_interface (sym
))
14675 if (sym
->attr
.is_protected
&& !sym
->attr
.proc_pointer
14676 && (sym
->attr
.procedure
|| sym
->attr
.external
))
14678 if (sym
->attr
.external
)
14679 gfc_error ("PROTECTED attribute conflicts with EXTERNAL attribute "
14680 "at %L", &sym
->declared_at
);
14682 gfc_error ("PROCEDURE attribute conflicts with PROTECTED attribute "
14683 "at %L", &sym
->declared_at
);
14688 if (sym
->attr
.flavor
== FL_DERIVED
&& !resolve_fl_derived (sym
))
14691 else if ((sym
->attr
.flavor
== FL_STRUCT
|| sym
->attr
.flavor
== FL_UNION
)
14692 && !resolve_fl_struct (sym
))
14695 /* Symbols that are module procedures with results (functions) have
14696 the types and array specification copied for type checking in
14697 procedures that call them, as well as for saving to a module
14698 file. These symbols can't stand the scrutiny that their results
14700 mp_flag
= (sym
->result
!= NULL
&& sym
->result
!= sym
);
14702 /* Make sure that the intrinsic is consistent with its internal
14703 representation. This needs to be done before assigning a default
14704 type to avoid spurious warnings. */
14705 if (sym
->attr
.flavor
!= FL_MODULE
&& sym
->attr
.intrinsic
14706 && !gfc_resolve_intrinsic (sym
, &sym
->declared_at
))
14709 /* Resolve associate names. */
14711 resolve_assoc_var (sym
, true);
14713 /* Assign default type to symbols that need one and don't have one. */
14714 if (sym
->ts
.type
== BT_UNKNOWN
)
14716 if (sym
->attr
.flavor
== FL_VARIABLE
|| sym
->attr
.flavor
== FL_PARAMETER
)
14718 gfc_set_default_type (sym
, 1, NULL
);
14721 if (sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.external
14722 && !sym
->attr
.function
&& !sym
->attr
.subroutine
14723 && gfc_get_default_type (sym
->name
, sym
->ns
)->type
== BT_UNKNOWN
)
14724 gfc_add_subroutine (&sym
->attr
, sym
->name
, &sym
->declared_at
);
14726 if (sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.function
)
14728 /* The specific case of an external procedure should emit an error
14729 in the case that there is no implicit type. */
14732 if (!sym
->attr
.mixed_entry_master
)
14733 gfc_set_default_type (sym
, sym
->attr
.external
, NULL
);
14737 /* Result may be in another namespace. */
14738 resolve_symbol (sym
->result
);
14740 if (!sym
->result
->attr
.proc_pointer
)
14742 sym
->ts
= sym
->result
->ts
;
14743 sym
->as
= gfc_copy_array_spec (sym
->result
->as
);
14744 sym
->attr
.dimension
= sym
->result
->attr
.dimension
;
14745 sym
->attr
.pointer
= sym
->result
->attr
.pointer
;
14746 sym
->attr
.allocatable
= sym
->result
->attr
.allocatable
;
14747 sym
->attr
.contiguous
= sym
->result
->attr
.contiguous
;
14752 else if (mp_flag
&& sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.function
)
14754 bool saved_specification_expr
= specification_expr
;
14755 specification_expr
= true;
14756 gfc_resolve_array_spec (sym
->result
->as
, false);
14757 specification_expr
= saved_specification_expr
;
14760 if (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
)
14762 as
= CLASS_DATA (sym
)->as
;
14763 class_attr
= CLASS_DATA (sym
)->attr
;
14764 class_attr
.pointer
= class_attr
.class_pointer
;
14768 class_attr
= sym
->attr
;
14773 if (sym
->attr
.contiguous
14774 && (!class_attr
.dimension
14775 || (as
->type
!= AS_ASSUMED_SHAPE
&& as
->type
!= AS_ASSUMED_RANK
14776 && !class_attr
.pointer
)))
14778 gfc_error ("%qs at %L has the CONTIGUOUS attribute but is not an "
14779 "array pointer or an assumed-shape or assumed-rank array",
14780 sym
->name
, &sym
->declared_at
);
14784 /* Assumed size arrays and assumed shape arrays must be dummy
14785 arguments. Array-spec's of implied-shape should have been resolved to
14786 AS_EXPLICIT already. */
14790 /* If AS_IMPLIED_SHAPE makes it to here, it must be a bad
14791 specification expression. */
14792 if (as
->type
== AS_IMPLIED_SHAPE
)
14795 for (i
=0; i
<as
->rank
; i
++)
14797 if (as
->lower
[i
] != NULL
&& as
->upper
[i
] == NULL
)
14799 gfc_error ("Bad specification for assumed size array at %L",
14800 &as
->lower
[i
]->where
);
14807 if (((as
->type
== AS_ASSUMED_SIZE
&& !as
->cp_was_assumed
)
14808 || as
->type
== AS_ASSUMED_SHAPE
)
14809 && !sym
->attr
.dummy
&& !sym
->attr
.select_type_temporary
)
14811 if (as
->type
== AS_ASSUMED_SIZE
)
14812 gfc_error ("Assumed size array at %L must be a dummy argument",
14813 &sym
->declared_at
);
14815 gfc_error ("Assumed shape array at %L must be a dummy argument",
14816 &sym
->declared_at
);
14819 /* TS 29113, C535a. */
14820 if (as
->type
== AS_ASSUMED_RANK
&& !sym
->attr
.dummy
14821 && !sym
->attr
.select_type_temporary
)
14823 gfc_error ("Assumed-rank array at %L must be a dummy argument",
14824 &sym
->declared_at
);
14827 if (as
->type
== AS_ASSUMED_RANK
14828 && (sym
->attr
.codimension
|| sym
->attr
.value
))
14830 gfc_error ("Assumed-rank array at %L may not have the VALUE or "
14831 "CODIMENSION attribute", &sym
->declared_at
);
14836 /* Make sure symbols with known intent or optional are really dummy
14837 variable. Because of ENTRY statement, this has to be deferred
14838 until resolution time. */
14840 if (!sym
->attr
.dummy
14841 && (sym
->attr
.optional
|| sym
->attr
.intent
!= INTENT_UNKNOWN
))
14843 gfc_error ("Symbol at %L is not a DUMMY variable", &sym
->declared_at
);
14847 if (sym
->attr
.value
&& !sym
->attr
.dummy
)
14849 gfc_error ("%qs at %L cannot have the VALUE attribute because "
14850 "it is not a dummy argument", sym
->name
, &sym
->declared_at
);
14854 if (sym
->attr
.value
&& sym
->ts
.type
== BT_CHARACTER
)
14856 gfc_charlen
*cl
= sym
->ts
.u
.cl
;
14857 if (!cl
|| !cl
->length
|| cl
->length
->expr_type
!= EXPR_CONSTANT
)
14859 gfc_error ("Character dummy variable %qs at %L with VALUE "
14860 "attribute must have constant length",
14861 sym
->name
, &sym
->declared_at
);
14865 if (sym
->ts
.is_c_interop
14866 && mpz_cmp_si (cl
->length
->value
.integer
, 1) != 0)
14868 gfc_error ("C interoperable character dummy variable %qs at %L "
14869 "with VALUE attribute must have length one",
14870 sym
->name
, &sym
->declared_at
);
14875 if (sym
->ts
.type
== BT_DERIVED
&& !sym
->attr
.is_iso_c
14876 && sym
->ts
.u
.derived
->attr
.generic
)
14878 sym
->ts
.u
.derived
= gfc_find_dt_in_generic (sym
->ts
.u
.derived
);
14879 if (!sym
->ts
.u
.derived
)
14881 gfc_error ("The derived type %qs at %L is of type %qs, "
14882 "which has not been defined", sym
->name
,
14883 &sym
->declared_at
, sym
->ts
.u
.derived
->name
);
14884 sym
->ts
.type
= BT_UNKNOWN
;
14889 /* Use the same constraints as TYPE(*), except for the type check
14890 and that only scalars and assumed-size arrays are permitted. */
14891 if (sym
->attr
.ext_attr
& (1 << EXT_ATTR_NO_ARG_CHECK
))
14893 if (!sym
->attr
.dummy
)
14895 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute shall be "
14896 "a dummy argument", sym
->name
, &sym
->declared_at
);
14900 if (sym
->ts
.type
!= BT_ASSUMED
&& sym
->ts
.type
!= BT_INTEGER
14901 && sym
->ts
.type
!= BT_REAL
&& sym
->ts
.type
!= BT_LOGICAL
14902 && sym
->ts
.type
!= BT_COMPLEX
)
14904 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute shall be "
14905 "of type TYPE(*) or of an numeric intrinsic type",
14906 sym
->name
, &sym
->declared_at
);
14910 if (sym
->attr
.allocatable
|| sym
->attr
.codimension
14911 || sym
->attr
.pointer
|| sym
->attr
.value
)
14913 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute may not "
14914 "have the ALLOCATABLE, CODIMENSION, POINTER or VALUE "
14915 "attribute", sym
->name
, &sym
->declared_at
);
14919 if (sym
->attr
.intent
== INTENT_OUT
)
14921 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute may not "
14922 "have the INTENT(OUT) attribute",
14923 sym
->name
, &sym
->declared_at
);
14926 if (sym
->attr
.dimension
&& sym
->as
->type
!= AS_ASSUMED_SIZE
)
14928 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute shall "
14929 "either be a scalar or an assumed-size array",
14930 sym
->name
, &sym
->declared_at
);
14934 /* Set the type to TYPE(*) and add a dimension(*) to ensure
14935 NO_ARG_CHECK is correctly handled in trans*.c, e.g. with
14937 sym
->ts
.type
= BT_ASSUMED
;
14938 sym
->as
= gfc_get_array_spec ();
14939 sym
->as
->type
= AS_ASSUMED_SIZE
;
14941 sym
->as
->lower
[0] = gfc_get_int_expr (gfc_default_integer_kind
, NULL
, 1);
14943 else if (sym
->ts
.type
== BT_ASSUMED
)
14945 /* TS 29113, C407a. */
14946 if (!sym
->attr
.dummy
)
14948 gfc_error ("Assumed type of variable %s at %L is only permitted "
14949 "for dummy variables", sym
->name
, &sym
->declared_at
);
14952 if (sym
->attr
.allocatable
|| sym
->attr
.codimension
14953 || sym
->attr
.pointer
|| sym
->attr
.value
)
14955 gfc_error ("Assumed-type variable %s at %L may not have the "
14956 "ALLOCATABLE, CODIMENSION, POINTER or VALUE attribute",
14957 sym
->name
, &sym
->declared_at
);
14960 if (sym
->attr
.intent
== INTENT_OUT
)
14962 gfc_error ("Assumed-type variable %s at %L may not have the "
14963 "INTENT(OUT) attribute",
14964 sym
->name
, &sym
->declared_at
);
14967 if (sym
->attr
.dimension
&& sym
->as
->type
== AS_EXPLICIT
)
14969 gfc_error ("Assumed-type variable %s at %L shall not be an "
14970 "explicit-shape array", sym
->name
, &sym
->declared_at
);
14975 /* If the symbol is marked as bind(c), that it is declared at module level
14976 scope and verify its type and kind. Do not do the latter for symbols
14977 that are implicitly typed because that is handled in
14978 gfc_set_default_type. Handle dummy arguments and procedure definitions
14979 separately. Also, anything that is use associated is not handled here
14980 but instead is handled in the module it is declared in. Finally, derived
14981 type definitions are allowed to be BIND(C) since that only implies that
14982 they're interoperable, and they are checked fully for interoperability
14983 when a variable is declared of that type. */
14984 if (sym
->attr
.is_bind_c
&& sym
->attr
.use_assoc
== 0
14985 && sym
->attr
.dummy
== 0 && sym
->attr
.flavor
!= FL_PROCEDURE
14986 && sym
->attr
.flavor
!= FL_DERIVED
)
14990 /* First, make sure the variable is declared at the
14991 module-level scope (J3/04-007, Section 15.3). */
14992 if (sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
&&
14993 sym
->attr
.in_common
== 0)
14995 gfc_error ("Variable %qs at %L cannot be BIND(C) because it "
14996 "is neither a COMMON block nor declared at the "
14997 "module level scope", sym
->name
, &(sym
->declared_at
));
15000 else if (sym
->ts
.type
== BT_CHARACTER
15001 && (sym
->ts
.u
.cl
== NULL
|| sym
->ts
.u
.cl
->length
== NULL
15002 || !gfc_is_constant_expr (sym
->ts
.u
.cl
->length
)
15003 || mpz_cmp_si (sym
->ts
.u
.cl
->length
->value
.integer
, 1) != 0))
15005 gfc_error ("BIND(C) Variable %qs at %L must have length one",
15006 sym
->name
, &sym
->declared_at
);
15009 else if (sym
->common_head
!= NULL
&& sym
->attr
.implicit_type
== 0)
15011 t
= verify_com_block_vars_c_interop (sym
->common_head
);
15013 else if (sym
->attr
.implicit_type
== 0)
15015 /* If type() declaration, we need to verify that the components
15016 of the given type are all C interoperable, etc. */
15017 if (sym
->ts
.type
== BT_DERIVED
&&
15018 sym
->ts
.u
.derived
->attr
.is_c_interop
!= 1)
15020 /* Make sure the user marked the derived type as BIND(C). If
15021 not, call the verify routine. This could print an error
15022 for the derived type more than once if multiple variables
15023 of that type are declared. */
15024 if (sym
->ts
.u
.derived
->attr
.is_bind_c
!= 1)
15025 verify_bind_c_derived_type (sym
->ts
.u
.derived
);
15029 /* Verify the variable itself as C interoperable if it
15030 is BIND(C). It is not possible for this to succeed if
15031 the verify_bind_c_derived_type failed, so don't have to handle
15032 any error returned by verify_bind_c_derived_type. */
15033 t
= verify_bind_c_sym (sym
, &(sym
->ts
), sym
->attr
.in_common
,
15034 sym
->common_block
);
15039 /* clear the is_bind_c flag to prevent reporting errors more than
15040 once if something failed. */
15041 sym
->attr
.is_bind_c
= 0;
15046 /* If a derived type symbol has reached this point, without its
15047 type being declared, we have an error. Notice that most
15048 conditions that produce undefined derived types have already
15049 been dealt with. However, the likes of:
15050 implicit type(t) (t) ..... call foo (t) will get us here if
15051 the type is not declared in the scope of the implicit
15052 statement. Change the type to BT_UNKNOWN, both because it is so
15053 and to prevent an ICE. */
15054 if (sym
->ts
.type
== BT_DERIVED
&& !sym
->attr
.is_iso_c
15055 && sym
->ts
.u
.derived
->components
== NULL
15056 && !sym
->ts
.u
.derived
->attr
.zero_comp
)
15058 gfc_error ("The derived type %qs at %L is of type %qs, "
15059 "which has not been defined", sym
->name
,
15060 &sym
->declared_at
, sym
->ts
.u
.derived
->name
);
15061 sym
->ts
.type
= BT_UNKNOWN
;
15065 /* Make sure that the derived type has been resolved and that the
15066 derived type is visible in the symbol's namespace, if it is a
15067 module function and is not PRIVATE. */
15068 if (sym
->ts
.type
== BT_DERIVED
15069 && sym
->ts
.u
.derived
->attr
.use_assoc
15070 && sym
->ns
->proc_name
15071 && sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
15072 && !resolve_fl_derived (sym
->ts
.u
.derived
))
15075 /* Unless the derived-type declaration is use associated, Fortran 95
15076 does not allow public entries of private derived types.
15077 See 4.4.1 (F95) and 4.5.1.1 (F2003); and related interpretation
15078 161 in 95-006r3. */
15079 if (sym
->ts
.type
== BT_DERIVED
15080 && sym
->ns
->proc_name
&& sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
15081 && !sym
->ts
.u
.derived
->attr
.use_assoc
15082 && gfc_check_symbol_access (sym
)
15083 && !gfc_check_symbol_access (sym
->ts
.u
.derived
)
15084 && !gfc_notify_std (GFC_STD_F2003
, "PUBLIC %s %qs at %L of PRIVATE "
15085 "derived type %qs",
15086 (sym
->attr
.flavor
== FL_PARAMETER
)
15087 ? "parameter" : "variable",
15088 sym
->name
, &sym
->declared_at
,
15089 sym
->ts
.u
.derived
->name
))
15092 /* F2008, C1302. */
15093 if (sym
->ts
.type
== BT_DERIVED
15094 && ((sym
->ts
.u
.derived
->from_intmod
== INTMOD_ISO_FORTRAN_ENV
15095 && sym
->ts
.u
.derived
->intmod_sym_id
== ISOFORTRAN_LOCK_TYPE
)
15096 || sym
->ts
.u
.derived
->attr
.lock_comp
)
15097 && !sym
->attr
.codimension
&& !sym
->ts
.u
.derived
->attr
.coarray_comp
)
15099 gfc_error ("Variable %s at %L of type LOCK_TYPE or with subcomponent of "
15100 "type LOCK_TYPE must be a coarray", sym
->name
,
15101 &sym
->declared_at
);
15105 /* TS18508, C702/C703. */
15106 if (sym
->ts
.type
== BT_DERIVED
15107 && ((sym
->ts
.u
.derived
->from_intmod
== INTMOD_ISO_FORTRAN_ENV
15108 && sym
->ts
.u
.derived
->intmod_sym_id
== ISOFORTRAN_EVENT_TYPE
)
15109 || sym
->ts
.u
.derived
->attr
.event_comp
)
15110 && !sym
->attr
.codimension
&& !sym
->ts
.u
.derived
->attr
.coarray_comp
)
15112 gfc_error ("Variable %s at %L of type EVENT_TYPE or with subcomponent of "
15113 "type EVENT_TYPE must be a coarray", sym
->name
,
15114 &sym
->declared_at
);
15118 /* An assumed-size array with INTENT(OUT) shall not be of a type for which
15119 default initialization is defined (5.1.2.4.4). */
15120 if (sym
->ts
.type
== BT_DERIVED
15122 && sym
->attr
.intent
== INTENT_OUT
15124 && sym
->as
->type
== AS_ASSUMED_SIZE
)
15126 for (c
= sym
->ts
.u
.derived
->components
; c
; c
= c
->next
)
15128 if (c
->initializer
)
15130 gfc_error ("The INTENT(OUT) dummy argument %qs at %L is "
15131 "ASSUMED SIZE and so cannot have a default initializer",
15132 sym
->name
, &sym
->declared_at
);
15139 if (sym
->ts
.type
== BT_DERIVED
&& sym
->attr
.dummy
15140 && sym
->attr
.intent
== INTENT_OUT
&& sym
->attr
.lock_comp
)
15142 gfc_error ("Dummy argument %qs at %L of LOCK_TYPE shall not be "
15143 "INTENT(OUT)", sym
->name
, &sym
->declared_at
);
15148 if (sym
->ts
.type
== BT_DERIVED
&& sym
->attr
.dummy
15149 && sym
->attr
.intent
== INTENT_OUT
&& sym
->attr
.event_comp
)
15151 gfc_error ("Dummy argument %qs at %L of EVENT_TYPE shall not be "
15152 "INTENT(OUT)", sym
->name
, &sym
->declared_at
);
15157 if ((((sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
->attr
.coarray_comp
)
15158 || (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
15159 && CLASS_DATA (sym
)->attr
.coarray_comp
))
15160 || class_attr
.codimension
)
15161 && (sym
->attr
.result
|| sym
->result
== sym
))
15163 gfc_error ("Function result %qs at %L shall not be a coarray or have "
15164 "a coarray component", sym
->name
, &sym
->declared_at
);
15169 if (sym
->attr
.codimension
&& sym
->ts
.type
== BT_DERIVED
15170 && sym
->ts
.u
.derived
->ts
.is_iso_c
)
15172 gfc_error ("Variable %qs at %L of TYPE(C_PTR) or TYPE(C_FUNPTR) "
15173 "shall not be a coarray", sym
->name
, &sym
->declared_at
);
15178 if (((sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
->attr
.coarray_comp
)
15179 || (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
15180 && CLASS_DATA (sym
)->attr
.coarray_comp
))
15181 && (class_attr
.codimension
|| class_attr
.pointer
|| class_attr
.dimension
15182 || class_attr
.allocatable
))
15184 gfc_error ("Variable %qs at %L with coarray component shall be a "
15185 "nonpointer, nonallocatable scalar, which is not a coarray",
15186 sym
->name
, &sym
->declared_at
);
15190 /* F2008, C526. The function-result case was handled above. */
15191 if (class_attr
.codimension
15192 && !(class_attr
.allocatable
|| sym
->attr
.dummy
|| sym
->attr
.save
15193 || sym
->attr
.select_type_temporary
15194 || sym
->attr
.associate_var
15195 || (sym
->ns
->save_all
&& !sym
->attr
.automatic
)
15196 || sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
15197 || sym
->ns
->proc_name
->attr
.is_main_program
15198 || sym
->attr
.function
|| sym
->attr
.result
|| sym
->attr
.use_assoc
))
15200 gfc_error ("Variable %qs at %L is a coarray and is not ALLOCATABLE, SAVE "
15201 "nor a dummy argument", sym
->name
, &sym
->declared_at
);
15205 else if (class_attr
.codimension
&& !sym
->attr
.select_type_temporary
15206 && !class_attr
.allocatable
&& as
&& as
->cotype
== AS_DEFERRED
)
15208 gfc_error ("Coarray variable %qs at %L shall not have codimensions with "
15209 "deferred shape", sym
->name
, &sym
->declared_at
);
15212 else if (class_attr
.codimension
&& class_attr
.allocatable
&& as
15213 && (as
->cotype
!= AS_DEFERRED
|| as
->type
!= AS_DEFERRED
))
15215 gfc_error ("Allocatable coarray variable %qs at %L must have "
15216 "deferred shape", sym
->name
, &sym
->declared_at
);
15221 if ((((sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
->attr
.coarray_comp
)
15222 || (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
15223 && CLASS_DATA (sym
)->attr
.coarray_comp
))
15224 || (class_attr
.codimension
&& class_attr
.allocatable
))
15225 && sym
->attr
.dummy
&& sym
->attr
.intent
== INTENT_OUT
)
15227 gfc_error ("Variable %qs at %L is INTENT(OUT) and can thus not be an "
15228 "allocatable coarray or have coarray components",
15229 sym
->name
, &sym
->declared_at
);
15233 if (class_attr
.codimension
&& sym
->attr
.dummy
15234 && sym
->ns
->proc_name
&& sym
->ns
->proc_name
->attr
.is_bind_c
)
15236 gfc_error ("Coarray dummy variable %qs at %L not allowed in BIND(C) "
15237 "procedure %qs", sym
->name
, &sym
->declared_at
,
15238 sym
->ns
->proc_name
->name
);
15242 if (sym
->ts
.type
== BT_LOGICAL
15243 && ((sym
->attr
.function
&& sym
->attr
.is_bind_c
&& sym
->result
== sym
)
15244 || ((sym
->attr
.dummy
|| sym
->attr
.result
) && sym
->ns
->proc_name
15245 && sym
->ns
->proc_name
->attr
.is_bind_c
)))
15248 for (i
= 0; gfc_logical_kinds
[i
].kind
; i
++)
15249 if (gfc_logical_kinds
[i
].kind
== sym
->ts
.kind
)
15251 if (!gfc_logical_kinds
[i
].c_bool
&& sym
->attr
.dummy
15252 && !gfc_notify_std (GFC_STD_GNU
, "LOGICAL dummy argument %qs at "
15253 "%L with non-C_Bool kind in BIND(C) procedure "
15254 "%qs", sym
->name
, &sym
->declared_at
,
15255 sym
->ns
->proc_name
->name
))
15257 else if (!gfc_logical_kinds
[i
].c_bool
15258 && !gfc_notify_std (GFC_STD_GNU
, "LOGICAL result variable "
15259 "%qs at %L with non-C_Bool kind in "
15260 "BIND(C) procedure %qs", sym
->name
,
15262 sym
->attr
.function
? sym
->name
15263 : sym
->ns
->proc_name
->name
))
15267 switch (sym
->attr
.flavor
)
15270 if (!resolve_fl_variable (sym
, mp_flag
))
15275 if (sym
->formal
&& !sym
->formal_ns
)
15277 /* Check that none of the arguments are a namelist. */
15278 gfc_formal_arglist
*formal
= sym
->formal
;
15280 for (; formal
; formal
= formal
->next
)
15281 if (formal
->sym
&& formal
->sym
->attr
.flavor
== FL_NAMELIST
)
15283 gfc_error ("Namelist %qs can not be an argument to "
15284 "subroutine or function at %L",
15285 formal
->sym
->name
, &sym
->declared_at
);
15290 if (!resolve_fl_procedure (sym
, mp_flag
))
15295 if (!resolve_fl_namelist (sym
))
15300 if (!resolve_fl_parameter (sym
))
15308 /* Resolve array specifier. Check as well some constraints
15309 on COMMON blocks. */
15311 check_constant
= sym
->attr
.in_common
&& !sym
->attr
.pointer
;
15313 /* Set the formal_arg_flag so that check_conflict will not throw
15314 an error for host associated variables in the specification
15315 expression for an array_valued function. */
15316 if (sym
->attr
.function
&& sym
->as
)
15317 formal_arg_flag
= true;
15319 saved_specification_expr
= specification_expr
;
15320 specification_expr
= true;
15321 gfc_resolve_array_spec (sym
->as
, check_constant
);
15322 specification_expr
= saved_specification_expr
;
15324 formal_arg_flag
= false;
15326 /* Resolve formal namespaces. */
15327 if (sym
->formal_ns
&& sym
->formal_ns
!= gfc_current_ns
15328 && !sym
->attr
.contained
&& !sym
->attr
.intrinsic
)
15329 gfc_resolve (sym
->formal_ns
);
15331 /* Make sure the formal namespace is present. */
15332 if (sym
->formal
&& !sym
->formal_ns
)
15334 gfc_formal_arglist
*formal
= sym
->formal
;
15335 while (formal
&& !formal
->sym
)
15336 formal
= formal
->next
;
15340 sym
->formal_ns
= formal
->sym
->ns
;
15341 if (sym
->ns
!= formal
->sym
->ns
)
15342 sym
->formal_ns
->refs
++;
15346 /* Check threadprivate restrictions. */
15347 if (sym
->attr
.threadprivate
&& !sym
->attr
.save
15348 && !(sym
->ns
->save_all
&& !sym
->attr
.automatic
)
15349 && (!sym
->attr
.in_common
15350 && sym
->module
== NULL
15351 && (sym
->ns
->proc_name
== NULL
15352 || sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
)))
15353 gfc_error ("Threadprivate at %L isn't SAVEd", &sym
->declared_at
);
15355 /* Check omp declare target restrictions. */
15356 if (sym
->attr
.omp_declare_target
15357 && sym
->attr
.flavor
== FL_VARIABLE
15359 && !(sym
->ns
->save_all
&& !sym
->attr
.automatic
)
15360 && (!sym
->attr
.in_common
15361 && sym
->module
== NULL
15362 && (sym
->ns
->proc_name
== NULL
15363 || sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
)))
15364 gfc_error ("!$OMP DECLARE TARGET variable %qs at %L isn't SAVEd",
15365 sym
->name
, &sym
->declared_at
);
15367 /* If we have come this far we can apply default-initializers, as
15368 described in 14.7.5, to those variables that have not already
15369 been assigned one. */
15370 if (sym
->ts
.type
== BT_DERIVED
15372 && !sym
->attr
.allocatable
15373 && !sym
->attr
.alloc_comp
)
15375 symbol_attribute
*a
= &sym
->attr
;
15377 if ((!a
->save
&& !a
->dummy
&& !a
->pointer
15378 && !a
->in_common
&& !a
->use_assoc
15380 && !((a
->function
|| a
->result
)
15382 || sym
->ts
.u
.derived
->attr
.alloc_comp
15383 || sym
->ts
.u
.derived
->attr
.pointer_comp
))
15384 && !(a
->function
&& sym
!= sym
->result
))
15385 || (a
->dummy
&& a
->intent
== INTENT_OUT
&& !a
->pointer
))
15386 apply_default_init (sym
);
15387 else if (a
->function
&& sym
->result
&& a
->access
!= ACCESS_PRIVATE
15388 && (sym
->ts
.u
.derived
->attr
.alloc_comp
15389 || sym
->ts
.u
.derived
->attr
.pointer_comp
))
15390 /* Mark the result symbol to be referenced, when it has allocatable
15392 sym
->result
->attr
.referenced
= 1;
15395 if (sym
->ts
.type
== BT_CLASS
&& sym
->ns
== gfc_current_ns
15396 && sym
->attr
.dummy
&& sym
->attr
.intent
== INTENT_OUT
15397 && !CLASS_DATA (sym
)->attr
.class_pointer
15398 && !CLASS_DATA (sym
)->attr
.allocatable
)
15399 apply_default_init (sym
);
15401 /* If this symbol has a type-spec, check it. */
15402 if (sym
->attr
.flavor
== FL_VARIABLE
|| sym
->attr
.flavor
== FL_PARAMETER
15403 || (sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.function
))
15404 if (!resolve_typespec_used (&sym
->ts
, &sym
->declared_at
, sym
->name
))
15407 if (sym
->param_list
)
15412 /************* Resolve DATA statements *************/
15416 gfc_data_value
*vnode
;
15422 /* Advance the values structure to point to the next value in the data list. */
15425 next_data_value (void)
15427 while (mpz_cmp_ui (values
.left
, 0) == 0)
15430 if (values
.vnode
->next
== NULL
)
15433 values
.vnode
= values
.vnode
->next
;
15434 mpz_set (values
.left
, values
.vnode
->repeat
);
15442 check_data_variable (gfc_data_variable
*var
, locus
*where
)
15448 ar_type mark
= AR_UNKNOWN
;
15450 mpz_t section_index
[GFC_MAX_DIMENSIONS
];
15456 if (!gfc_resolve_expr (var
->expr
))
15460 mpz_init_set_si (offset
, 0);
15463 if (e
->expr_type
== EXPR_FUNCTION
&& e
->value
.function
.isym
15464 && e
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
)
15465 e
= e
->value
.function
.actual
->expr
;
15467 if (e
->expr_type
!= EXPR_VARIABLE
)
15468 gfc_internal_error ("check_data_variable(): Bad expression");
15470 sym
= e
->symtree
->n
.sym
;
15472 if (sym
->ns
->is_block_data
&& !sym
->attr
.in_common
)
15474 gfc_error ("BLOCK DATA element %qs at %L must be in COMMON",
15475 sym
->name
, &sym
->declared_at
);
15478 if (e
->ref
== NULL
&& sym
->as
)
15480 gfc_error ("DATA array %qs at %L must be specified in a previous"
15481 " declaration", sym
->name
, where
);
15485 has_pointer
= sym
->attr
.pointer
;
15487 if (gfc_is_coindexed (e
))
15489 gfc_error ("DATA element %qs at %L cannot have a coindex", sym
->name
,
15494 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
15496 if (ref
->type
== REF_COMPONENT
&& ref
->u
.c
.component
->attr
.pointer
)
15500 && ref
->type
== REF_ARRAY
15501 && ref
->u
.ar
.type
!= AR_FULL
)
15503 gfc_error ("DATA element %qs at %L is a pointer and so must "
15504 "be a full array", sym
->name
, where
);
15509 if (e
->rank
== 0 || has_pointer
)
15511 mpz_init_set_ui (size
, 1);
15518 /* Find the array section reference. */
15519 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
15521 if (ref
->type
!= REF_ARRAY
)
15523 if (ref
->u
.ar
.type
== AR_ELEMENT
)
15529 /* Set marks according to the reference pattern. */
15530 switch (ref
->u
.ar
.type
)
15538 /* Get the start position of array section. */
15539 gfc_get_section_index (ar
, section_index
, &offset
);
15544 gcc_unreachable ();
15547 if (!gfc_array_size (e
, &size
))
15549 gfc_error ("Nonconstant array section at %L in DATA statement",
15551 mpz_clear (offset
);
15558 while (mpz_cmp_ui (size
, 0) > 0)
15560 if (!next_data_value ())
15562 gfc_error ("DATA statement at %L has more variables than values",
15568 t
= gfc_check_assign (var
->expr
, values
.vnode
->expr
, 0);
15572 /* If we have more than one element left in the repeat count,
15573 and we have more than one element left in the target variable,
15574 then create a range assignment. */
15575 /* FIXME: Only done for full arrays for now, since array sections
15577 if (mark
== AR_FULL
&& ref
&& ref
->next
== NULL
15578 && mpz_cmp_ui (values
.left
, 1) > 0 && mpz_cmp_ui (size
, 1) > 0)
15582 if (mpz_cmp (size
, values
.left
) >= 0)
15584 mpz_init_set (range
, values
.left
);
15585 mpz_sub (size
, size
, values
.left
);
15586 mpz_set_ui (values
.left
, 0);
15590 mpz_init_set (range
, size
);
15591 mpz_sub (values
.left
, values
.left
, size
);
15592 mpz_set_ui (size
, 0);
15595 t
= gfc_assign_data_value (var
->expr
, values
.vnode
->expr
,
15598 mpz_add (offset
, offset
, range
);
15605 /* Assign initial value to symbol. */
15608 mpz_sub_ui (values
.left
, values
.left
, 1);
15609 mpz_sub_ui (size
, size
, 1);
15611 t
= gfc_assign_data_value (var
->expr
, values
.vnode
->expr
,
15616 if (mark
== AR_FULL
)
15617 mpz_add_ui (offset
, offset
, 1);
15619 /* Modify the array section indexes and recalculate the offset
15620 for next element. */
15621 else if (mark
== AR_SECTION
)
15622 gfc_advance_section (section_index
, ar
, &offset
);
15626 if (mark
== AR_SECTION
)
15628 for (i
= 0; i
< ar
->dimen
; i
++)
15629 mpz_clear (section_index
[i
]);
15633 mpz_clear (offset
);
15639 static bool traverse_data_var (gfc_data_variable
*, locus
*);
15641 /* Iterate over a list of elements in a DATA statement. */
15644 traverse_data_list (gfc_data_variable
*var
, locus
*where
)
15647 iterator_stack frame
;
15648 gfc_expr
*e
, *start
, *end
, *step
;
15649 bool retval
= true;
15651 mpz_init (frame
.value
);
15654 start
= gfc_copy_expr (var
->iter
.start
);
15655 end
= gfc_copy_expr (var
->iter
.end
);
15656 step
= gfc_copy_expr (var
->iter
.step
);
15658 if (!gfc_simplify_expr (start
, 1)
15659 || start
->expr_type
!= EXPR_CONSTANT
)
15661 gfc_error ("start of implied-do loop at %L could not be "
15662 "simplified to a constant value", &start
->where
);
15666 if (!gfc_simplify_expr (end
, 1)
15667 || end
->expr_type
!= EXPR_CONSTANT
)
15669 gfc_error ("end of implied-do loop at %L could not be "
15670 "simplified to a constant value", &start
->where
);
15674 if (!gfc_simplify_expr (step
, 1)
15675 || step
->expr_type
!= EXPR_CONSTANT
)
15677 gfc_error ("step of implied-do loop at %L could not be "
15678 "simplified to a constant value", &start
->where
);
15683 mpz_set (trip
, end
->value
.integer
);
15684 mpz_sub (trip
, trip
, start
->value
.integer
);
15685 mpz_add (trip
, trip
, step
->value
.integer
);
15687 mpz_div (trip
, trip
, step
->value
.integer
);
15689 mpz_set (frame
.value
, start
->value
.integer
);
15691 frame
.prev
= iter_stack
;
15692 frame
.variable
= var
->iter
.var
->symtree
;
15693 iter_stack
= &frame
;
15695 while (mpz_cmp_ui (trip
, 0) > 0)
15697 if (!traverse_data_var (var
->list
, where
))
15703 e
= gfc_copy_expr (var
->expr
);
15704 if (!gfc_simplify_expr (e
, 1))
15711 mpz_add (frame
.value
, frame
.value
, step
->value
.integer
);
15713 mpz_sub_ui (trip
, trip
, 1);
15717 mpz_clear (frame
.value
);
15720 gfc_free_expr (start
);
15721 gfc_free_expr (end
);
15722 gfc_free_expr (step
);
15724 iter_stack
= frame
.prev
;
15729 /* Type resolve variables in the variable list of a DATA statement. */
15732 traverse_data_var (gfc_data_variable
*var
, locus
*where
)
15736 for (; var
; var
= var
->next
)
15738 if (var
->expr
== NULL
)
15739 t
= traverse_data_list (var
, where
);
15741 t
= check_data_variable (var
, where
);
15751 /* Resolve the expressions and iterators associated with a data statement.
15752 This is separate from the assignment checking because data lists should
15753 only be resolved once. */
15756 resolve_data_variables (gfc_data_variable
*d
)
15758 for (; d
; d
= d
->next
)
15760 if (d
->list
== NULL
)
15762 if (!gfc_resolve_expr (d
->expr
))
15767 if (!gfc_resolve_iterator (&d
->iter
, false, true))
15770 if (!resolve_data_variables (d
->list
))
15779 /* Resolve a single DATA statement. We implement this by storing a pointer to
15780 the value list into static variables, and then recursively traversing the
15781 variables list, expanding iterators and such. */
15784 resolve_data (gfc_data
*d
)
15787 if (!resolve_data_variables (d
->var
))
15790 values
.vnode
= d
->value
;
15791 if (d
->value
== NULL
)
15792 mpz_set_ui (values
.left
, 0);
15794 mpz_set (values
.left
, d
->value
->repeat
);
15796 if (!traverse_data_var (d
->var
, &d
->where
))
15799 /* At this point, we better not have any values left. */
15801 if (next_data_value ())
15802 gfc_error ("DATA statement at %L has more values than variables",
15807 /* 12.6 Constraint: In a pure subprogram any variable which is in common or
15808 accessed by host or use association, is a dummy argument to a pure function,
15809 is a dummy argument with INTENT (IN) to a pure subroutine, or an object that
15810 is storage associated with any such variable, shall not be used in the
15811 following contexts: (clients of this function). */
15813 /* Determines if a variable is not 'pure', i.e., not assignable within a pure
15814 procedure. Returns zero if assignment is OK, nonzero if there is a
15817 gfc_impure_variable (gfc_symbol
*sym
)
15822 if (sym
->attr
.use_assoc
|| sym
->attr
.in_common
)
15825 /* Check if the symbol's ns is inside the pure procedure. */
15826 for (ns
= gfc_current_ns
; ns
; ns
= ns
->parent
)
15830 if (ns
->proc_name
->attr
.flavor
== FL_PROCEDURE
&& !sym
->attr
.function
)
15834 proc
= sym
->ns
->proc_name
;
15835 if (sym
->attr
.dummy
15836 && ((proc
->attr
.subroutine
&& sym
->attr
.intent
== INTENT_IN
)
15837 || proc
->attr
.function
))
15840 /* TODO: Sort out what can be storage associated, if anything, and include
15841 it here. In principle equivalences should be scanned but it does not
15842 seem to be possible to storage associate an impure variable this way. */
15847 /* Test whether a symbol is pure or not. For a NULL pointer, checks if the
15848 current namespace is inside a pure procedure. */
15851 gfc_pure (gfc_symbol
*sym
)
15853 symbol_attribute attr
;
15858 /* Check if the current namespace or one of its parents
15859 belongs to a pure procedure. */
15860 for (ns
= gfc_current_ns
; ns
; ns
= ns
->parent
)
15862 sym
= ns
->proc_name
;
15866 if (attr
.flavor
== FL_PROCEDURE
&& attr
.pure
)
15874 return attr
.flavor
== FL_PROCEDURE
&& attr
.pure
;
15878 /* Test whether a symbol is implicitly pure or not. For a NULL pointer,
15879 checks if the current namespace is implicitly pure. Note that this
15880 function returns false for a PURE procedure. */
15883 gfc_implicit_pure (gfc_symbol
*sym
)
15889 /* Check if the current procedure is implicit_pure. Walk up
15890 the procedure list until we find a procedure. */
15891 for (ns
= gfc_current_ns
; ns
; ns
= ns
->parent
)
15893 sym
= ns
->proc_name
;
15897 if (sym
->attr
.flavor
== FL_PROCEDURE
)
15902 return sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.implicit_pure
15903 && !sym
->attr
.pure
;
15908 gfc_unset_implicit_pure (gfc_symbol
*sym
)
15914 /* Check if the current procedure is implicit_pure. Walk up
15915 the procedure list until we find a procedure. */
15916 for (ns
= gfc_current_ns
; ns
; ns
= ns
->parent
)
15918 sym
= ns
->proc_name
;
15922 if (sym
->attr
.flavor
== FL_PROCEDURE
)
15927 if (sym
->attr
.flavor
== FL_PROCEDURE
)
15928 sym
->attr
.implicit_pure
= 0;
15930 sym
->attr
.pure
= 0;
15934 /* Test whether the current procedure is elemental or not. */
15937 gfc_elemental (gfc_symbol
*sym
)
15939 symbol_attribute attr
;
15942 sym
= gfc_current_ns
->proc_name
;
15947 return attr
.flavor
== FL_PROCEDURE
&& attr
.elemental
;
15951 /* Warn about unused labels. */
15954 warn_unused_fortran_label (gfc_st_label
*label
)
15959 warn_unused_fortran_label (label
->left
);
15961 if (label
->defined
== ST_LABEL_UNKNOWN
)
15964 switch (label
->referenced
)
15966 case ST_LABEL_UNKNOWN
:
15967 gfc_warning (OPT_Wunused_label
, "Label %d at %L defined but not used",
15968 label
->value
, &label
->where
);
15971 case ST_LABEL_BAD_TARGET
:
15972 gfc_warning (OPT_Wunused_label
,
15973 "Label %d at %L defined but cannot be used",
15974 label
->value
, &label
->where
);
15981 warn_unused_fortran_label (label
->right
);
15985 /* Returns the sequence type of a symbol or sequence. */
15988 sequence_type (gfc_typespec ts
)
15997 if (ts
.u
.derived
->components
== NULL
)
15998 return SEQ_NONDEFAULT
;
16000 result
= sequence_type (ts
.u
.derived
->components
->ts
);
16001 for (c
= ts
.u
.derived
->components
->next
; c
; c
= c
->next
)
16002 if (sequence_type (c
->ts
) != result
)
16008 if (ts
.kind
!= gfc_default_character_kind
)
16009 return SEQ_NONDEFAULT
;
16011 return SEQ_CHARACTER
;
16014 if (ts
.kind
!= gfc_default_integer_kind
)
16015 return SEQ_NONDEFAULT
;
16017 return SEQ_NUMERIC
;
16020 if (!(ts
.kind
== gfc_default_real_kind
16021 || ts
.kind
== gfc_default_double_kind
))
16022 return SEQ_NONDEFAULT
;
16024 return SEQ_NUMERIC
;
16027 if (ts
.kind
!= gfc_default_complex_kind
)
16028 return SEQ_NONDEFAULT
;
16030 return SEQ_NUMERIC
;
16033 if (ts
.kind
!= gfc_default_logical_kind
)
16034 return SEQ_NONDEFAULT
;
16036 return SEQ_NUMERIC
;
16039 return SEQ_NONDEFAULT
;
16044 /* Resolve derived type EQUIVALENCE object. */
16047 resolve_equivalence_derived (gfc_symbol
*derived
, gfc_symbol
*sym
, gfc_expr
*e
)
16049 gfc_component
*c
= derived
->components
;
16054 /* Shall not be an object of nonsequence derived type. */
16055 if (!derived
->attr
.sequence
)
16057 gfc_error ("Derived type variable %qs at %L must have SEQUENCE "
16058 "attribute to be an EQUIVALENCE object", sym
->name
,
16063 /* Shall not have allocatable components. */
16064 if (derived
->attr
.alloc_comp
)
16066 gfc_error ("Derived type variable %qs at %L cannot have ALLOCATABLE "
16067 "components to be an EQUIVALENCE object",sym
->name
,
16072 if (sym
->attr
.in_common
&& gfc_has_default_initializer (sym
->ts
.u
.derived
))
16074 gfc_error ("Derived type variable %qs at %L with default "
16075 "initialization cannot be in EQUIVALENCE with a variable "
16076 "in COMMON", sym
->name
, &e
->where
);
16080 for (; c
; c
= c
->next
)
16082 if (gfc_bt_struct (c
->ts
.type
)
16083 && (!resolve_equivalence_derived(c
->ts
.u
.derived
, sym
, e
)))
16086 /* Shall not be an object of sequence derived type containing a pointer
16087 in the structure. */
16088 if (c
->attr
.pointer
)
16090 gfc_error ("Derived type variable %qs at %L with pointer "
16091 "component(s) cannot be an EQUIVALENCE object",
16092 sym
->name
, &e
->where
);
16100 /* Resolve equivalence object.
16101 An EQUIVALENCE object shall not be a dummy argument, a pointer, a target,
16102 an allocatable array, an object of nonsequence derived type, an object of
16103 sequence derived type containing a pointer at any level of component
16104 selection, an automatic object, a function name, an entry name, a result
16105 name, a named constant, a structure component, or a subobject of any of
16106 the preceding objects. A substring shall not have length zero. A
16107 derived type shall not have components with default initialization nor
16108 shall two objects of an equivalence group be initialized.
16109 Either all or none of the objects shall have an protected attribute.
16110 The simple constraints are done in symbol.c(check_conflict) and the rest
16111 are implemented here. */
16114 resolve_equivalence (gfc_equiv
*eq
)
16117 gfc_symbol
*first_sym
;
16120 locus
*last_where
= NULL
;
16121 seq_type eq_type
, last_eq_type
;
16122 gfc_typespec
*last_ts
;
16123 int object
, cnt_protected
;
16126 last_ts
= &eq
->expr
->symtree
->n
.sym
->ts
;
16128 first_sym
= eq
->expr
->symtree
->n
.sym
;
16132 for (object
= 1; eq
; eq
= eq
->eq
, object
++)
16136 e
->ts
= e
->symtree
->n
.sym
->ts
;
16137 /* match_varspec might not know yet if it is seeing
16138 array reference or substring reference, as it doesn't
16140 if (e
->ref
&& e
->ref
->type
== REF_ARRAY
)
16142 gfc_ref
*ref
= e
->ref
;
16143 sym
= e
->symtree
->n
.sym
;
16145 if (sym
->attr
.dimension
)
16147 ref
->u
.ar
.as
= sym
->as
;
16151 /* For substrings, convert REF_ARRAY into REF_SUBSTRING. */
16152 if (e
->ts
.type
== BT_CHARACTER
16154 && ref
->type
== REF_ARRAY
16155 && ref
->u
.ar
.dimen
== 1
16156 && ref
->u
.ar
.dimen_type
[0] == DIMEN_RANGE
16157 && ref
->u
.ar
.stride
[0] == NULL
)
16159 gfc_expr
*start
= ref
->u
.ar
.start
[0];
16160 gfc_expr
*end
= ref
->u
.ar
.end
[0];
16163 /* Optimize away the (:) reference. */
16164 if (start
== NULL
&& end
== NULL
)
16167 e
->ref
= ref
->next
;
16169 e
->ref
->next
= ref
->next
;
16174 ref
->type
= REF_SUBSTRING
;
16176 start
= gfc_get_int_expr (gfc_charlen_int_kind
,
16178 ref
->u
.ss
.start
= start
;
16179 if (end
== NULL
&& e
->ts
.u
.cl
)
16180 end
= gfc_copy_expr (e
->ts
.u
.cl
->length
);
16181 ref
->u
.ss
.end
= end
;
16182 ref
->u
.ss
.length
= e
->ts
.u
.cl
;
16189 /* Any further ref is an error. */
16192 gcc_assert (ref
->type
== REF_ARRAY
);
16193 gfc_error ("Syntax error in EQUIVALENCE statement at %L",
16199 if (!gfc_resolve_expr (e
))
16202 sym
= e
->symtree
->n
.sym
;
16204 if (sym
->attr
.is_protected
)
16206 if (cnt_protected
> 0 && cnt_protected
!= object
)
16208 gfc_error ("Either all or none of the objects in the "
16209 "EQUIVALENCE set at %L shall have the "
16210 "PROTECTED attribute",
16215 /* Shall not equivalence common block variables in a PURE procedure. */
16216 if (sym
->ns
->proc_name
16217 && sym
->ns
->proc_name
->attr
.pure
16218 && sym
->attr
.in_common
)
16220 /* Need to check for symbols that may have entered the pure
16221 procedure via a USE statement. */
16222 bool saw_sym
= false;
16223 if (sym
->ns
->use_stmts
)
16226 for (r
= sym
->ns
->use_stmts
->rename
; r
; r
= r
->next
)
16227 if (strcmp(r
->use_name
, sym
->name
) == 0) saw_sym
= true;
16233 gfc_error ("COMMON block member %qs at %L cannot be an "
16234 "EQUIVALENCE object in the pure procedure %qs",
16235 sym
->name
, &e
->where
, sym
->ns
->proc_name
->name
);
16239 /* Shall not be a named constant. */
16240 if (e
->expr_type
== EXPR_CONSTANT
)
16242 gfc_error ("Named constant %qs at %L cannot be an EQUIVALENCE "
16243 "object", sym
->name
, &e
->where
);
16247 if (e
->ts
.type
== BT_DERIVED
16248 && !resolve_equivalence_derived (e
->ts
.u
.derived
, sym
, e
))
16251 /* Check that the types correspond correctly:
16253 A numeric sequence structure may be equivalenced to another sequence
16254 structure, an object of default integer type, default real type, double
16255 precision real type, default logical type such that components of the
16256 structure ultimately only become associated to objects of the same
16257 kind. A character sequence structure may be equivalenced to an object
16258 of default character kind or another character sequence structure.
16259 Other objects may be equivalenced only to objects of the same type and
16260 kind parameters. */
16262 /* Identical types are unconditionally OK. */
16263 if (object
== 1 || gfc_compare_types (last_ts
, &sym
->ts
))
16264 goto identical_types
;
16266 last_eq_type
= sequence_type (*last_ts
);
16267 eq_type
= sequence_type (sym
->ts
);
16269 /* Since the pair of objects is not of the same type, mixed or
16270 non-default sequences can be rejected. */
16272 msg
= "Sequence %s with mixed components in EQUIVALENCE "
16273 "statement at %L with different type objects";
16275 && last_eq_type
== SEQ_MIXED
16276 && !gfc_notify_std (GFC_STD_GNU
, msg
, first_sym
->name
, last_where
))
16277 || (eq_type
== SEQ_MIXED
16278 && !gfc_notify_std (GFC_STD_GNU
, msg
, sym
->name
, &e
->where
)))
16281 msg
= "Non-default type object or sequence %s in EQUIVALENCE "
16282 "statement at %L with objects of different type";
16284 && last_eq_type
== SEQ_NONDEFAULT
16285 && !gfc_notify_std (GFC_STD_GNU
, msg
, first_sym
->name
, last_where
))
16286 || (eq_type
== SEQ_NONDEFAULT
16287 && !gfc_notify_std (GFC_STD_GNU
, msg
, sym
->name
, &e
->where
)))
16290 msg
="Non-CHARACTER object %qs in default CHARACTER "
16291 "EQUIVALENCE statement at %L";
16292 if (last_eq_type
== SEQ_CHARACTER
16293 && eq_type
!= SEQ_CHARACTER
16294 && !gfc_notify_std (GFC_STD_GNU
, msg
, sym
->name
, &e
->where
))
16297 msg
="Non-NUMERIC object %qs in default NUMERIC "
16298 "EQUIVALENCE statement at %L";
16299 if (last_eq_type
== SEQ_NUMERIC
16300 && eq_type
!= SEQ_NUMERIC
16301 && !gfc_notify_std (GFC_STD_GNU
, msg
, sym
->name
, &e
->where
))
16306 last_where
= &e
->where
;
16311 /* Shall not be an automatic array. */
16312 if (e
->ref
->type
== REF_ARRAY
16313 && !gfc_resolve_array_spec (e
->ref
->u
.ar
.as
, 1))
16315 gfc_error ("Array %qs at %L with non-constant bounds cannot be "
16316 "an EQUIVALENCE object", sym
->name
, &e
->where
);
16323 /* Shall not be a structure component. */
16324 if (r
->type
== REF_COMPONENT
)
16326 gfc_error ("Structure component %qs at %L cannot be an "
16327 "EQUIVALENCE object",
16328 r
->u
.c
.component
->name
, &e
->where
);
16332 /* A substring shall not have length zero. */
16333 if (r
->type
== REF_SUBSTRING
)
16335 if (compare_bound (r
->u
.ss
.start
, r
->u
.ss
.end
) == CMP_GT
)
16337 gfc_error ("Substring at %L has length zero",
16338 &r
->u
.ss
.start
->where
);
16348 /* Function called by resolve_fntype to flag other symbol used in the
16349 length type parameter specification of function resuls. */
16352 flag_fn_result_spec (gfc_expr
*expr
,
16354 int *f ATTRIBUTE_UNUSED
)
16359 if (expr
->expr_type
== EXPR_VARIABLE
)
16361 s
= expr
->symtree
->n
.sym
;
16362 for (ns
= s
->ns
; ns
; ns
= ns
->parent
)
16368 gfc_error ("Self reference in character length expression "
16369 "for %qs at %L", sym
->name
, &expr
->where
);
16373 if (!s
->fn_result_spec
16374 && s
->attr
.flavor
== FL_PARAMETER
)
16376 /* Function contained in a module.... */
16377 if (ns
->proc_name
&& ns
->proc_name
->attr
.flavor
== FL_MODULE
)
16380 s
->fn_result_spec
= 1;
16381 /* Make sure that this symbol is translated as a module
16383 st
= gfc_get_unique_symtree (ns
);
16387 /* ... which is use associated and called. */
16388 else if (s
->attr
.use_assoc
|| s
->attr
.used_in_submodule
16390 /* External function matched with an interface. */
16393 && s
->ns
->proc_name
->attr
.if_source
== IFSRC_DECL
)
16394 || s
->ns
->proc_name
->attr
.if_source
== IFSRC_IFBODY
)
16395 && s
->ns
->proc_name
->attr
.function
))
16396 s
->fn_result_spec
= 1;
16403 /* Resolve function and ENTRY types, issue diagnostics if needed. */
16406 resolve_fntype (gfc_namespace
*ns
)
16408 gfc_entry_list
*el
;
16411 if (ns
->proc_name
== NULL
|| !ns
->proc_name
->attr
.function
)
16414 /* If there are any entries, ns->proc_name is the entry master
16415 synthetic symbol and ns->entries->sym actual FUNCTION symbol. */
16417 sym
= ns
->entries
->sym
;
16419 sym
= ns
->proc_name
;
16420 if (sym
->result
== sym
16421 && sym
->ts
.type
== BT_UNKNOWN
16422 && !gfc_set_default_type (sym
, 0, NULL
)
16423 && !sym
->attr
.untyped
)
16425 gfc_error ("Function %qs at %L has no IMPLICIT type",
16426 sym
->name
, &sym
->declared_at
);
16427 sym
->attr
.untyped
= 1;
16430 if (sym
->ts
.type
== BT_DERIVED
&& !sym
->ts
.u
.derived
->attr
.use_assoc
16431 && !sym
->attr
.contained
16432 && !gfc_check_symbol_access (sym
->ts
.u
.derived
)
16433 && gfc_check_symbol_access (sym
))
16435 gfc_notify_std (GFC_STD_F2003
, "PUBLIC function %qs at "
16436 "%L of PRIVATE type %qs", sym
->name
,
16437 &sym
->declared_at
, sym
->ts
.u
.derived
->name
);
16441 for (el
= ns
->entries
->next
; el
; el
= el
->next
)
16443 if (el
->sym
->result
== el
->sym
16444 && el
->sym
->ts
.type
== BT_UNKNOWN
16445 && !gfc_set_default_type (el
->sym
, 0, NULL
)
16446 && !el
->sym
->attr
.untyped
)
16448 gfc_error ("ENTRY %qs at %L has no IMPLICIT type",
16449 el
->sym
->name
, &el
->sym
->declared_at
);
16450 el
->sym
->attr
.untyped
= 1;
16454 if (sym
->ts
.type
== BT_CHARACTER
)
16455 gfc_traverse_expr (sym
->ts
.u
.cl
->length
, sym
, flag_fn_result_spec
, 0);
16459 /* 12.3.2.1.1 Defined operators. */
16462 check_uop_procedure (gfc_symbol
*sym
, locus where
)
16464 gfc_formal_arglist
*formal
;
16466 if (!sym
->attr
.function
)
16468 gfc_error ("User operator procedure %qs at %L must be a FUNCTION",
16469 sym
->name
, &where
);
16473 if (sym
->ts
.type
== BT_CHARACTER
16474 && !((sym
->ts
.u
.cl
&& sym
->ts
.u
.cl
->length
) || sym
->ts
.deferred
)
16475 && !(sym
->result
&& ((sym
->result
->ts
.u
.cl
16476 && sym
->result
->ts
.u
.cl
->length
) || sym
->result
->ts
.deferred
)))
16478 gfc_error ("User operator procedure %qs at %L cannot be assumed "
16479 "character length", sym
->name
, &where
);
16483 formal
= gfc_sym_get_dummy_args (sym
);
16484 if (!formal
|| !formal
->sym
)
16486 gfc_error ("User operator procedure %qs at %L must have at least "
16487 "one argument", sym
->name
, &where
);
16491 if (formal
->sym
->attr
.intent
!= INTENT_IN
)
16493 gfc_error ("First argument of operator interface at %L must be "
16494 "INTENT(IN)", &where
);
16498 if (formal
->sym
->attr
.optional
)
16500 gfc_error ("First argument of operator interface at %L cannot be "
16501 "optional", &where
);
16505 formal
= formal
->next
;
16506 if (!formal
|| !formal
->sym
)
16509 if (formal
->sym
->attr
.intent
!= INTENT_IN
)
16511 gfc_error ("Second argument of operator interface at %L must be "
16512 "INTENT(IN)", &where
);
16516 if (formal
->sym
->attr
.optional
)
16518 gfc_error ("Second argument of operator interface at %L cannot be "
16519 "optional", &where
);
16525 gfc_error ("Operator interface at %L must have, at most, two "
16526 "arguments", &where
);
16534 gfc_resolve_uops (gfc_symtree
*symtree
)
16536 gfc_interface
*itr
;
16538 if (symtree
== NULL
)
16541 gfc_resolve_uops (symtree
->left
);
16542 gfc_resolve_uops (symtree
->right
);
16544 for (itr
= symtree
->n
.uop
->op
; itr
; itr
= itr
->next
)
16545 check_uop_procedure (itr
->sym
, itr
->sym
->declared_at
);
16549 /* Examine all of the expressions associated with a program unit,
16550 assign types to all intermediate expressions, make sure that all
16551 assignments are to compatible types and figure out which names
16552 refer to which functions or subroutines. It doesn't check code
16553 block, which is handled by gfc_resolve_code. */
16556 resolve_types (gfc_namespace
*ns
)
16562 gfc_namespace
* old_ns
= gfc_current_ns
;
16564 if (ns
->types_resolved
)
16567 /* Check that all IMPLICIT types are ok. */
16568 if (!ns
->seen_implicit_none
)
16571 for (letter
= 0; letter
!= GFC_LETTERS
; ++letter
)
16572 if (ns
->set_flag
[letter
]
16573 && !resolve_typespec_used (&ns
->default_type
[letter
],
16574 &ns
->implicit_loc
[letter
], NULL
))
16578 gfc_current_ns
= ns
;
16580 resolve_entries (ns
);
16582 resolve_common_vars (&ns
->blank_common
, false);
16583 resolve_common_blocks (ns
->common_root
);
16585 resolve_contained_functions (ns
);
16587 if (ns
->proc_name
&& ns
->proc_name
->attr
.flavor
== FL_PROCEDURE
16588 && ns
->proc_name
->attr
.if_source
== IFSRC_IFBODY
)
16589 resolve_formal_arglist (ns
->proc_name
);
16591 gfc_traverse_ns (ns
, resolve_bind_c_derived_types
);
16593 for (cl
= ns
->cl_list
; cl
; cl
= cl
->next
)
16594 resolve_charlen (cl
);
16596 gfc_traverse_ns (ns
, resolve_symbol
);
16598 resolve_fntype (ns
);
16600 for (n
= ns
->contained
; n
; n
= n
->sibling
)
16602 if (gfc_pure (ns
->proc_name
) && !gfc_pure (n
->proc_name
))
16603 gfc_error ("Contained procedure %qs at %L of a PURE procedure must "
16604 "also be PURE", n
->proc_name
->name
,
16605 &n
->proc_name
->declared_at
);
16611 gfc_do_concurrent_flag
= 0;
16612 gfc_check_interfaces (ns
);
16614 gfc_traverse_ns (ns
, resolve_values
);
16620 for (d
= ns
->data
; d
; d
= d
->next
)
16624 gfc_traverse_ns (ns
, gfc_formalize_init_value
);
16626 gfc_traverse_ns (ns
, gfc_verify_binding_labels
);
16628 for (eq
= ns
->equiv
; eq
; eq
= eq
->next
)
16629 resolve_equivalence (eq
);
16631 /* Warn about unused labels. */
16632 if (warn_unused_label
)
16633 warn_unused_fortran_label (ns
->st_labels
);
16635 gfc_resolve_uops (ns
->uop_root
);
16637 gfc_traverse_ns (ns
, gfc_verify_DTIO_procedures
);
16639 gfc_resolve_omp_declare_simd (ns
);
16641 gfc_resolve_omp_udrs (ns
->omp_udr_root
);
16643 ns
->types_resolved
= 1;
16645 gfc_current_ns
= old_ns
;
16649 /* Call gfc_resolve_code recursively. */
16652 resolve_codes (gfc_namespace
*ns
)
16655 bitmap_obstack old_obstack
;
16657 if (ns
->resolved
== 1)
16660 for (n
= ns
->contained
; n
; n
= n
->sibling
)
16663 gfc_current_ns
= ns
;
16665 /* Don't clear 'cs_base' if this is the namespace of a BLOCK construct. */
16666 if (!(ns
->proc_name
&& ns
->proc_name
->attr
.flavor
== FL_LABEL
))
16669 /* Set to an out of range value. */
16670 current_entry_id
= -1;
16672 old_obstack
= labels_obstack
;
16673 bitmap_obstack_initialize (&labels_obstack
);
16675 gfc_resolve_oacc_declare (ns
);
16676 gfc_resolve_omp_local_vars (ns
);
16677 gfc_resolve_code (ns
->code
, ns
);
16679 bitmap_obstack_release (&labels_obstack
);
16680 labels_obstack
= old_obstack
;
16684 /* This function is called after a complete program unit has been compiled.
16685 Its purpose is to examine all of the expressions associated with a program
16686 unit, assign types to all intermediate expressions, make sure that all
16687 assignments are to compatible types and figure out which names refer to
16688 which functions or subroutines. */
16691 gfc_resolve (gfc_namespace
*ns
)
16693 gfc_namespace
*old_ns
;
16694 code_stack
*old_cs_base
;
16695 struct gfc_omp_saved_state old_omp_state
;
16701 old_ns
= gfc_current_ns
;
16702 old_cs_base
= cs_base
;
16704 /* As gfc_resolve can be called during resolution of an OpenMP construct
16705 body, we should clear any state associated to it, so that say NS's
16706 DO loops are not interpreted as OpenMP loops. */
16707 if (!ns
->construct_entities
)
16708 gfc_omp_save_and_clear_state (&old_omp_state
);
16710 resolve_types (ns
);
16711 component_assignment_level
= 0;
16712 resolve_codes (ns
);
16714 gfc_current_ns
= old_ns
;
16715 cs_base
= old_cs_base
;
16718 gfc_run_passes (ns
);
16720 if (!ns
->construct_entities
)
16721 gfc_omp_restore_state (&old_omp_state
);