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
);
5132 /* F2008, R610 alias F2018, R908. */
5133 if (current_part_dimension
|| seen_part_dimension
)
5135 gfc_error ("Substring reference of nonscalar not permitted at %L",
5142 if (((ref
->type
== REF_COMPONENT
&& n_components
> 1)
5143 || ref
->next
== NULL
)
5144 && current_part_dimension
5145 && seen_part_dimension
)
5147 gfc_error ("Two or more part references with nonzero rank must "
5148 "not be specified at %L", &expr
->where
);
5152 if (ref
->type
== REF_COMPONENT
)
5154 if (current_part_dimension
)
5155 seen_part_dimension
= 1;
5157 /* reset to make sure */
5158 current_part_dimension
= 0;
5166 /* Given an expression, determine its shape. This is easier than it sounds.
5167 Leaves the shape array NULL if it is not possible to determine the shape. */
5170 expression_shape (gfc_expr
*e
)
5172 mpz_t array
[GFC_MAX_DIMENSIONS
];
5175 if (e
->rank
<= 0 || e
->shape
!= NULL
)
5178 for (i
= 0; i
< e
->rank
; i
++)
5179 if (!gfc_array_dimen_size (e
, i
, &array
[i
]))
5182 e
->shape
= gfc_get_shape (e
->rank
);
5184 memcpy (e
->shape
, array
, e
->rank
* sizeof (mpz_t
));
5189 for (i
--; i
>= 0; i
--)
5190 mpz_clear (array
[i
]);
5194 /* Given a variable expression node, compute the rank of the expression by
5195 examining the base symbol and any reference structures it may have. */
5198 expression_rank (gfc_expr
*e
)
5203 /* Just to make sure, because EXPR_COMPCALL's also have an e->ref and that
5204 could lead to serious confusion... */
5205 gcc_assert (e
->expr_type
!= EXPR_COMPCALL
);
5209 if (e
->expr_type
== EXPR_ARRAY
)
5211 /* Constructors can have a rank different from one via RESHAPE(). */
5213 if (e
->symtree
== NULL
)
5219 e
->rank
= (e
->symtree
->n
.sym
->as
== NULL
)
5220 ? 0 : e
->symtree
->n
.sym
->as
->rank
;
5226 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
5228 if (ref
->type
== REF_COMPONENT
&& ref
->u
.c
.component
->attr
.proc_pointer
5229 && ref
->u
.c
.component
->attr
.function
&& !ref
->next
)
5230 rank
= ref
->u
.c
.component
->as
? ref
->u
.c
.component
->as
->rank
: 0;
5232 if (ref
->type
!= REF_ARRAY
)
5235 if (ref
->u
.ar
.type
== AR_FULL
)
5237 rank
= ref
->u
.ar
.as
->rank
;
5241 if (ref
->u
.ar
.type
== AR_SECTION
)
5243 /* Figure out the rank of the section. */
5245 gfc_internal_error ("expression_rank(): Two array specs");
5247 for (i
= 0; i
< ref
->u
.ar
.dimen
; i
++)
5248 if (ref
->u
.ar
.dimen_type
[i
] == DIMEN_RANGE
5249 || ref
->u
.ar
.dimen_type
[i
] == DIMEN_VECTOR
)
5259 expression_shape (e
);
5264 add_caf_get_intrinsic (gfc_expr
*e
)
5266 gfc_expr
*wrapper
, *tmp_expr
;
5270 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
5271 if (ref
->type
== REF_ARRAY
&& ref
->u
.ar
.codimen
> 0)
5276 for (n
= ref
->u
.ar
.dimen
; n
< ref
->u
.ar
.dimen
+ ref
->u
.ar
.codimen
; n
++)
5277 if (ref
->u
.ar
.dimen_type
[n
] != DIMEN_ELEMENT
)
5280 tmp_expr
= XCNEW (gfc_expr
);
5282 wrapper
= gfc_build_intrinsic_call (gfc_current_ns
, GFC_ISYM_CAF_GET
,
5283 "caf_get", tmp_expr
->where
, 1, tmp_expr
);
5284 wrapper
->ts
= e
->ts
;
5285 wrapper
->rank
= e
->rank
;
5287 wrapper
->shape
= gfc_copy_shape (e
->shape
, e
->rank
);
5294 remove_caf_get_intrinsic (gfc_expr
*e
)
5296 gcc_assert (e
->expr_type
== EXPR_FUNCTION
&& e
->value
.function
.isym
5297 && e
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
);
5298 gfc_expr
*e2
= e
->value
.function
.actual
->expr
;
5299 e
->value
.function
.actual
->expr
= NULL
;
5300 gfc_free_actual_arglist (e
->value
.function
.actual
);
5301 gfc_free_shape (&e
->shape
, e
->rank
);
5307 /* Resolve a variable expression. */
5310 resolve_variable (gfc_expr
*e
)
5317 if (e
->symtree
== NULL
)
5319 sym
= e
->symtree
->n
.sym
;
5321 /* Use same check as for TYPE(*) below; this check has to be before TYPE(*)
5322 as ts.type is set to BT_ASSUMED in resolve_symbol. */
5323 if (sym
->attr
.ext_attr
& (1 << EXT_ATTR_NO_ARG_CHECK
))
5325 if (!actual_arg
|| inquiry_argument
)
5327 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute may only "
5328 "be used as actual argument", sym
->name
, &e
->where
);
5332 /* TS 29113, 407b. */
5333 else if (e
->ts
.type
== BT_ASSUMED
)
5337 gfc_error ("Assumed-type variable %s at %L may only be used "
5338 "as actual argument", sym
->name
, &e
->where
);
5341 else if (inquiry_argument
&& !first_actual_arg
)
5343 /* FIXME: It doesn't work reliably as inquiry_argument is not set
5344 for all inquiry functions in resolve_function; the reason is
5345 that the function-name resolution happens too late in that
5347 gfc_error ("Assumed-type variable %s at %L as actual argument to "
5348 "an inquiry function shall be the first argument",
5349 sym
->name
, &e
->where
);
5353 /* TS 29113, C535b. */
5354 else if ((sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
5355 && CLASS_DATA (sym
)->as
5356 && CLASS_DATA (sym
)->as
->type
== AS_ASSUMED_RANK
)
5357 || (sym
->ts
.type
!= BT_CLASS
&& sym
->as
5358 && sym
->as
->type
== AS_ASSUMED_RANK
))
5362 gfc_error ("Assumed-rank variable %s at %L may only be used as "
5363 "actual argument", sym
->name
, &e
->where
);
5366 else if (inquiry_argument
&& !first_actual_arg
)
5368 /* FIXME: It doesn't work reliably as inquiry_argument is not set
5369 for all inquiry functions in resolve_function; the reason is
5370 that the function-name resolution happens too late in that
5372 gfc_error ("Assumed-rank variable %s at %L as actual argument "
5373 "to an inquiry function shall be the first argument",
5374 sym
->name
, &e
->where
);
5379 if ((sym
->attr
.ext_attr
& (1 << EXT_ATTR_NO_ARG_CHECK
)) && e
->ref
5380 && !(e
->ref
->type
== REF_ARRAY
&& e
->ref
->u
.ar
.type
== AR_FULL
5381 && e
->ref
->next
== NULL
))
5383 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute shall not have "
5384 "a subobject reference", sym
->name
, &e
->ref
->u
.ar
.where
);
5387 /* TS 29113, 407b. */
5388 else if (e
->ts
.type
== BT_ASSUMED
&& e
->ref
5389 && !(e
->ref
->type
== REF_ARRAY
&& e
->ref
->u
.ar
.type
== AR_FULL
5390 && e
->ref
->next
== NULL
))
5392 gfc_error ("Assumed-type variable %s at %L shall not have a subobject "
5393 "reference", sym
->name
, &e
->ref
->u
.ar
.where
);
5397 /* TS 29113, C535b. */
5398 if (((sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
5399 && CLASS_DATA (sym
)->as
5400 && CLASS_DATA (sym
)->as
->type
== AS_ASSUMED_RANK
)
5401 || (sym
->ts
.type
!= BT_CLASS
&& sym
->as
5402 && sym
->as
->type
== AS_ASSUMED_RANK
))
5404 && !(e
->ref
->type
== REF_ARRAY
&& e
->ref
->u
.ar
.type
== AR_FULL
5405 && e
->ref
->next
== NULL
))
5407 gfc_error ("Assumed-rank variable %s at %L shall not have a subobject "
5408 "reference", sym
->name
, &e
->ref
->u
.ar
.where
);
5412 /* For variables that are used in an associate (target => object) where
5413 the object's basetype is array valued while the target is scalar,
5414 the ts' type of the component refs is still array valued, which
5415 can't be translated that way. */
5416 if (sym
->assoc
&& e
->rank
== 0 && e
->ref
&& sym
->ts
.type
== BT_CLASS
5417 && sym
->assoc
->target
->ts
.type
== BT_CLASS
5418 && CLASS_DATA (sym
->assoc
->target
)->as
)
5420 gfc_ref
*ref
= e
->ref
;
5426 ref
->u
.c
.sym
= sym
->ts
.u
.derived
;
5427 /* Stop the loop. */
5437 /* If this is an associate-name, it may be parsed with an array reference
5438 in error even though the target is scalar. Fail directly in this case.
5439 TODO Understand why class scalar expressions must be excluded. */
5440 if (sym
->assoc
&& !(sym
->ts
.type
== BT_CLASS
&& e
->rank
== 0))
5442 if (sym
->ts
.type
== BT_CLASS
)
5443 gfc_fix_class_refs (e
);
5444 if (!sym
->attr
.dimension
&& e
->ref
&& e
->ref
->type
== REF_ARRAY
)
5448 if (sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
->attr
.generic
)
5449 sym
->ts
.u
.derived
= gfc_find_dt_in_generic (sym
->ts
.u
.derived
);
5451 /* On the other hand, the parser may not have known this is an array;
5452 in this case, we have to add a FULL reference. */
5453 if (sym
->assoc
&& sym
->attr
.dimension
&& !e
->ref
)
5455 e
->ref
= gfc_get_ref ();
5456 e
->ref
->type
= REF_ARRAY
;
5457 e
->ref
->u
.ar
.type
= AR_FULL
;
5458 e
->ref
->u
.ar
.dimen
= 0;
5461 /* Like above, but for class types, where the checking whether an array
5462 ref is present is more complicated. Furthermore make sure not to add
5463 the full array ref to _vptr or _len refs. */
5464 if (sym
->assoc
&& sym
->ts
.type
== BT_CLASS
5465 && CLASS_DATA (sym
)->attr
.dimension
5466 && (e
->ts
.type
!= BT_DERIVED
|| !e
->ts
.u
.derived
->attr
.vtype
))
5468 gfc_ref
*ref
, *newref
;
5470 newref
= gfc_get_ref ();
5471 newref
->type
= REF_ARRAY
;
5472 newref
->u
.ar
.type
= AR_FULL
;
5473 newref
->u
.ar
.dimen
= 0;
5474 /* Because this is an associate var and the first ref either is a ref to
5475 the _data component or not, no traversal of the ref chain is
5476 needed. The array ref needs to be inserted after the _data ref,
5477 or when that is not present, which may happend for polymorphic
5478 types, then at the first position. */
5482 else if (ref
->type
== REF_COMPONENT
5483 && strcmp ("_data", ref
->u
.c
.component
->name
) == 0)
5485 if (!ref
->next
|| ref
->next
->type
!= REF_ARRAY
)
5487 newref
->next
= ref
->next
;
5491 /* Array ref present already. */
5492 gfc_free_ref_list (newref
);
5494 else if (ref
->type
== REF_ARRAY
)
5495 /* Array ref present already. */
5496 gfc_free_ref_list (newref
);
5504 if (e
->ref
&& !resolve_ref (e
))
5507 if (sym
->attr
.flavor
== FL_PROCEDURE
5508 && (!sym
->attr
.function
5509 || (sym
->attr
.function
&& sym
->result
5510 && sym
->result
->attr
.proc_pointer
5511 && !sym
->result
->attr
.function
)))
5513 e
->ts
.type
= BT_PROCEDURE
;
5514 goto resolve_procedure
;
5517 if (sym
->ts
.type
!= BT_UNKNOWN
)
5518 gfc_variable_attr (e
, &e
->ts
);
5519 else if (sym
->attr
.flavor
== FL_PROCEDURE
5520 && sym
->attr
.function
&& sym
->result
5521 && sym
->result
->ts
.type
!= BT_UNKNOWN
5522 && sym
->result
->attr
.proc_pointer
)
5523 e
->ts
= sym
->result
->ts
;
5526 /* Must be a simple variable reference. */
5527 if (!gfc_set_default_type (sym
, 1, sym
->ns
))
5532 if (check_assumed_size_reference (sym
, e
))
5535 /* Deal with forward references to entries during gfc_resolve_code, to
5536 satisfy, at least partially, 12.5.2.5. */
5537 if (gfc_current_ns
->entries
5538 && current_entry_id
== sym
->entry_id
5541 && cs_base
->current
->op
!= EXEC_ENTRY
)
5543 gfc_entry_list
*entry
;
5544 gfc_formal_arglist
*formal
;
5546 bool seen
, saved_specification_expr
;
5548 /* If the symbol is a dummy... */
5549 if (sym
->attr
.dummy
&& sym
->ns
== gfc_current_ns
)
5551 entry
= gfc_current_ns
->entries
;
5554 /* ...test if the symbol is a parameter of previous entries. */
5555 for (; entry
&& entry
->id
<= current_entry_id
; entry
= entry
->next
)
5556 for (formal
= entry
->sym
->formal
; formal
; formal
= formal
->next
)
5558 if (formal
->sym
&& sym
->name
== formal
->sym
->name
)
5565 /* If it has not been seen as a dummy, this is an error. */
5568 if (specification_expr
)
5569 gfc_error ("Variable %qs, used in a specification expression"
5570 ", is referenced at %L before the ENTRY statement "
5571 "in which it is a parameter",
5572 sym
->name
, &cs_base
->current
->loc
);
5574 gfc_error ("Variable %qs is used at %L before the ENTRY "
5575 "statement in which it is a parameter",
5576 sym
->name
, &cs_base
->current
->loc
);
5581 /* Now do the same check on the specification expressions. */
5582 saved_specification_expr
= specification_expr
;
5583 specification_expr
= true;
5584 if (sym
->ts
.type
== BT_CHARACTER
5585 && !gfc_resolve_expr (sym
->ts
.u
.cl
->length
))
5589 for (n
= 0; n
< sym
->as
->rank
; n
++)
5591 if (!gfc_resolve_expr (sym
->as
->lower
[n
]))
5593 if (!gfc_resolve_expr (sym
->as
->upper
[n
]))
5596 specification_expr
= saved_specification_expr
;
5599 /* Update the symbol's entry level. */
5600 sym
->entry_id
= current_entry_id
+ 1;
5603 /* If a symbol has been host_associated mark it. This is used latter,
5604 to identify if aliasing is possible via host association. */
5605 if (sym
->attr
.flavor
== FL_VARIABLE
5606 && gfc_current_ns
->parent
5607 && (gfc_current_ns
->parent
== sym
->ns
5608 || (gfc_current_ns
->parent
->parent
5609 && gfc_current_ns
->parent
->parent
== sym
->ns
)))
5610 sym
->attr
.host_assoc
= 1;
5612 if (gfc_current_ns
->proc_name
5613 && sym
->attr
.dimension
5614 && (sym
->ns
!= gfc_current_ns
5615 || sym
->attr
.use_assoc
5616 || sym
->attr
.in_common
))
5617 gfc_current_ns
->proc_name
->attr
.array_outer_dependency
= 1;
5620 if (t
&& !resolve_procedure_expression (e
))
5623 /* F2008, C617 and C1229. */
5624 if (!inquiry_argument
&& (e
->ts
.type
== BT_CLASS
|| e
->ts
.type
== BT_DERIVED
)
5625 && gfc_is_coindexed (e
))
5627 gfc_ref
*ref
, *ref2
= NULL
;
5629 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
5631 if (ref
->type
== REF_COMPONENT
)
5633 if (ref
->type
== REF_ARRAY
&& ref
->u
.ar
.codimen
> 0)
5637 for ( ; ref
; ref
= ref
->next
)
5638 if (ref
->type
== REF_COMPONENT
)
5641 /* Expression itself is not coindexed object. */
5642 if (ref
&& e
->ts
.type
== BT_CLASS
)
5644 gfc_error ("Polymorphic subobject of coindexed object at %L",
5649 /* Expression itself is coindexed object. */
5653 c
= ref2
? ref2
->u
.c
.component
: e
->symtree
->n
.sym
->components
;
5654 for ( ; c
; c
= c
->next
)
5655 if (c
->attr
.allocatable
&& c
->ts
.type
== BT_CLASS
)
5657 gfc_error ("Coindexed object with polymorphic allocatable "
5658 "subcomponent at %L", &e
->where
);
5666 expression_rank (e
);
5668 if (t
&& flag_coarray
== GFC_FCOARRAY_LIB
&& gfc_is_coindexed (e
))
5669 add_caf_get_intrinsic (e
);
5671 /* Simplify cases where access to a parameter array results in a
5672 single constant. Suppress errors since those will have been
5673 issued before, as warnings. */
5674 if (e
->rank
== 0 && sym
->as
&& sym
->attr
.flavor
== FL_PARAMETER
)
5676 gfc_push_suppress_errors ();
5677 gfc_simplify_expr (e
, 1);
5678 gfc_pop_suppress_errors ();
5685 /* Checks to see that the correct symbol has been host associated.
5686 The only situation where this arises is that in which a twice
5687 contained function is parsed after the host association is made.
5688 Therefore, on detecting this, change the symbol in the expression
5689 and convert the array reference into an actual arglist if the old
5690 symbol is a variable. */
5692 check_host_association (gfc_expr
*e
)
5694 gfc_symbol
*sym
, *old_sym
;
5698 gfc_actual_arglist
*arg
, *tail
= NULL
;
5699 bool retval
= e
->expr_type
== EXPR_FUNCTION
;
5701 /* If the expression is the result of substitution in
5702 interface.c(gfc_extend_expr) because there is no way in
5703 which the host association can be wrong. */
5704 if (e
->symtree
== NULL
5705 || e
->symtree
->n
.sym
== NULL
5706 || e
->user_operator
)
5709 old_sym
= e
->symtree
->n
.sym
;
5711 if (gfc_current_ns
->parent
5712 && old_sym
->ns
!= gfc_current_ns
)
5714 /* Use the 'USE' name so that renamed module symbols are
5715 correctly handled. */
5716 gfc_find_symbol (e
->symtree
->name
, gfc_current_ns
, 1, &sym
);
5718 if (sym
&& old_sym
!= sym
5719 && sym
->ts
.type
== old_sym
->ts
.type
5720 && sym
->attr
.flavor
== FL_PROCEDURE
5721 && sym
->attr
.contained
)
5723 /* Clear the shape, since it might not be valid. */
5724 gfc_free_shape (&e
->shape
, e
->rank
);
5726 /* Give the expression the right symtree! */
5727 gfc_find_sym_tree (e
->symtree
->name
, NULL
, 1, &st
);
5728 gcc_assert (st
!= NULL
);
5730 if (old_sym
->attr
.flavor
== FL_PROCEDURE
5731 || e
->expr_type
== EXPR_FUNCTION
)
5733 /* Original was function so point to the new symbol, since
5734 the actual argument list is already attached to the
5736 e
->value
.function
.esym
= NULL
;
5741 /* Original was variable so convert array references into
5742 an actual arglist. This does not need any checking now
5743 since resolve_function will take care of it. */
5744 e
->value
.function
.actual
= NULL
;
5745 e
->expr_type
= EXPR_FUNCTION
;
5748 /* Ambiguity will not arise if the array reference is not
5749 the last reference. */
5750 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
5751 if (ref
->type
== REF_ARRAY
&& ref
->next
== NULL
)
5754 gcc_assert (ref
->type
== REF_ARRAY
);
5756 /* Grab the start expressions from the array ref and
5757 copy them into actual arguments. */
5758 for (n
= 0; n
< ref
->u
.ar
.dimen
; n
++)
5760 arg
= gfc_get_actual_arglist ();
5761 arg
->expr
= gfc_copy_expr (ref
->u
.ar
.start
[n
]);
5762 if (e
->value
.function
.actual
== NULL
)
5763 tail
= e
->value
.function
.actual
= arg
;
5771 /* Dump the reference list and set the rank. */
5772 gfc_free_ref_list (e
->ref
);
5774 e
->rank
= sym
->as
? sym
->as
->rank
: 0;
5777 gfc_resolve_expr (e
);
5781 /* This might have changed! */
5782 return e
->expr_type
== EXPR_FUNCTION
;
5787 gfc_resolve_character_operator (gfc_expr
*e
)
5789 gfc_expr
*op1
= e
->value
.op
.op1
;
5790 gfc_expr
*op2
= e
->value
.op
.op2
;
5791 gfc_expr
*e1
= NULL
;
5792 gfc_expr
*e2
= NULL
;
5794 gcc_assert (e
->value
.op
.op
== INTRINSIC_CONCAT
);
5796 if (op1
->ts
.u
.cl
&& op1
->ts
.u
.cl
->length
)
5797 e1
= gfc_copy_expr (op1
->ts
.u
.cl
->length
);
5798 else if (op1
->expr_type
== EXPR_CONSTANT
)
5799 e1
= gfc_get_int_expr (gfc_charlen_int_kind
, NULL
,
5800 op1
->value
.character
.length
);
5802 if (op2
->ts
.u
.cl
&& op2
->ts
.u
.cl
->length
)
5803 e2
= gfc_copy_expr (op2
->ts
.u
.cl
->length
);
5804 else if (op2
->expr_type
== EXPR_CONSTANT
)
5805 e2
= gfc_get_int_expr (gfc_charlen_int_kind
, NULL
,
5806 op2
->value
.character
.length
);
5808 e
->ts
.u
.cl
= gfc_new_charlen (gfc_current_ns
, NULL
);
5818 e
->ts
.u
.cl
->length
= gfc_add (e1
, e2
);
5819 e
->ts
.u
.cl
->length
->ts
.type
= BT_INTEGER
;
5820 e
->ts
.u
.cl
->length
->ts
.kind
= gfc_charlen_int_kind
;
5821 gfc_simplify_expr (e
->ts
.u
.cl
->length
, 0);
5822 gfc_resolve_expr (e
->ts
.u
.cl
->length
);
5828 /* Ensure that an character expression has a charlen and, if possible, a
5829 length expression. */
5832 fixup_charlen (gfc_expr
*e
)
5834 /* The cases fall through so that changes in expression type and the need
5835 for multiple fixes are picked up. In all circumstances, a charlen should
5836 be available for the middle end to hang a backend_decl on. */
5837 switch (e
->expr_type
)
5840 gfc_resolve_character_operator (e
);
5844 if (e
->expr_type
== EXPR_ARRAY
)
5845 gfc_resolve_character_array_constructor (e
);
5848 case EXPR_SUBSTRING
:
5849 if (!e
->ts
.u
.cl
&& e
->ref
)
5850 gfc_resolve_substring_charlen (e
);
5855 e
->ts
.u
.cl
= gfc_new_charlen (gfc_current_ns
, NULL
);
5862 /* Update an actual argument to include the passed-object for type-bound
5863 procedures at the right position. */
5865 static gfc_actual_arglist
*
5866 update_arglist_pass (gfc_actual_arglist
* lst
, gfc_expr
* po
, unsigned argpos
,
5869 gcc_assert (argpos
> 0);
5873 gfc_actual_arglist
* result
;
5875 result
= gfc_get_actual_arglist ();
5879 result
->name
= name
;
5885 lst
->next
= update_arglist_pass (lst
->next
, po
, argpos
- 1, name
);
5887 lst
= update_arglist_pass (NULL
, po
, argpos
- 1, name
);
5892 /* Extract the passed-object from an EXPR_COMPCALL (a copy of it). */
5895 extract_compcall_passed_object (gfc_expr
* e
)
5899 gcc_assert (e
->expr_type
== EXPR_COMPCALL
);
5901 if (e
->value
.compcall
.base_object
)
5902 po
= gfc_copy_expr (e
->value
.compcall
.base_object
);
5905 po
= gfc_get_expr ();
5906 po
->expr_type
= EXPR_VARIABLE
;
5907 po
->symtree
= e
->symtree
;
5908 po
->ref
= gfc_copy_ref (e
->ref
);
5909 po
->where
= e
->where
;
5912 if (!gfc_resolve_expr (po
))
5919 /* Update the arglist of an EXPR_COMPCALL expression to include the
5923 update_compcall_arglist (gfc_expr
* e
)
5926 gfc_typebound_proc
* tbp
;
5928 tbp
= e
->value
.compcall
.tbp
;
5933 po
= extract_compcall_passed_object (e
);
5937 if (tbp
->nopass
|| e
->value
.compcall
.ignore_pass
)
5943 if (tbp
->pass_arg_num
<= 0)
5946 e
->value
.compcall
.actual
= update_arglist_pass (e
->value
.compcall
.actual
, po
,
5954 /* Extract the passed object from a PPC call (a copy of it). */
5957 extract_ppc_passed_object (gfc_expr
*e
)
5962 po
= gfc_get_expr ();
5963 po
->expr_type
= EXPR_VARIABLE
;
5964 po
->symtree
= e
->symtree
;
5965 po
->ref
= gfc_copy_ref (e
->ref
);
5966 po
->where
= e
->where
;
5968 /* Remove PPC reference. */
5970 while ((*ref
)->next
)
5971 ref
= &(*ref
)->next
;
5972 gfc_free_ref_list (*ref
);
5975 if (!gfc_resolve_expr (po
))
5982 /* Update the actual arglist of a procedure pointer component to include the
5986 update_ppc_arglist (gfc_expr
* e
)
5990 gfc_typebound_proc
* tb
;
5992 ppc
= gfc_get_proc_ptr_comp (e
);
6000 else if (tb
->nopass
)
6003 po
= extract_ppc_passed_object (e
);
6010 gfc_error ("Passed-object at %L must be scalar", &e
->where
);
6015 if (po
->ts
.type
== BT_DERIVED
&& po
->ts
.u
.derived
->attr
.abstract
)
6017 gfc_error ("Base object for procedure-pointer component call at %L is of"
6018 " ABSTRACT type %qs", &e
->where
, po
->ts
.u
.derived
->name
);
6022 gcc_assert (tb
->pass_arg_num
> 0);
6023 e
->value
.compcall
.actual
= update_arglist_pass (e
->value
.compcall
.actual
, po
,
6031 /* Check that the object a TBP is called on is valid, i.e. it must not be
6032 of ABSTRACT type (as in subobject%abstract_parent%tbp()). */
6035 check_typebound_baseobject (gfc_expr
* e
)
6038 bool return_value
= false;
6040 base
= extract_compcall_passed_object (e
);
6044 gcc_assert (base
->ts
.type
== BT_DERIVED
|| base
->ts
.type
== BT_CLASS
);
6046 if (base
->ts
.type
== BT_CLASS
&& !gfc_expr_attr (base
).class_ok
)
6050 if (base
->ts
.type
== BT_DERIVED
&& base
->ts
.u
.derived
->attr
.abstract
)
6052 gfc_error ("Base object for type-bound procedure call at %L is of"
6053 " ABSTRACT type %qs", &e
->where
, base
->ts
.u
.derived
->name
);
6057 /* F08:C1230. If the procedure called is NOPASS,
6058 the base object must be scalar. */
6059 if (e
->value
.compcall
.tbp
->nopass
&& base
->rank
!= 0)
6061 gfc_error ("Base object for NOPASS type-bound procedure call at %L must"
6062 " be scalar", &e
->where
);
6066 return_value
= true;
6069 gfc_free_expr (base
);
6070 return return_value
;
6074 /* Resolve a call to a type-bound procedure, either function or subroutine,
6075 statically from the data in an EXPR_COMPCALL expression. The adapted
6076 arglist and the target-procedure symtree are returned. */
6079 resolve_typebound_static (gfc_expr
* e
, gfc_symtree
** target
,
6080 gfc_actual_arglist
** actual
)
6082 gcc_assert (e
->expr_type
== EXPR_COMPCALL
);
6083 gcc_assert (!e
->value
.compcall
.tbp
->is_generic
);
6085 /* Update the actual arglist for PASS. */
6086 if (!update_compcall_arglist (e
))
6089 *actual
= e
->value
.compcall
.actual
;
6090 *target
= e
->value
.compcall
.tbp
->u
.specific
;
6092 gfc_free_ref_list (e
->ref
);
6094 e
->value
.compcall
.actual
= NULL
;
6096 /* If we find a deferred typebound procedure, check for derived types
6097 that an overriding typebound procedure has not been missed. */
6098 if (e
->value
.compcall
.name
6099 && !e
->value
.compcall
.tbp
->non_overridable
6100 && e
->value
.compcall
.base_object
6101 && e
->value
.compcall
.base_object
->ts
.type
== BT_DERIVED
)
6104 gfc_symbol
*derived
;
6106 /* Use the derived type of the base_object. */
6107 derived
= e
->value
.compcall
.base_object
->ts
.u
.derived
;
6110 /* If necessary, go through the inheritance chain. */
6111 while (!st
&& derived
)
6113 /* Look for the typebound procedure 'name'. */
6114 if (derived
->f2k_derived
&& derived
->f2k_derived
->tb_sym_root
)
6115 st
= gfc_find_symtree (derived
->f2k_derived
->tb_sym_root
,
6116 e
->value
.compcall
.name
);
6118 derived
= gfc_get_derived_super_type (derived
);
6121 /* Now find the specific name in the derived type namespace. */
6122 if (st
&& st
->n
.tb
&& st
->n
.tb
->u
.specific
)
6123 gfc_find_sym_tree (st
->n
.tb
->u
.specific
->name
,
6124 derived
->ns
, 1, &st
);
6132 /* Get the ultimate declared type from an expression. In addition,
6133 return the last class/derived type reference and the copy of the
6134 reference list. If check_types is set true, derived types are
6135 identified as well as class references. */
6137 get_declared_from_expr (gfc_ref
**class_ref
, gfc_ref
**new_ref
,
6138 gfc_expr
*e
, bool check_types
)
6140 gfc_symbol
*declared
;
6147 *new_ref
= gfc_copy_ref (e
->ref
);
6149 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
6151 if (ref
->type
!= REF_COMPONENT
)
6154 if ((ref
->u
.c
.component
->ts
.type
== BT_CLASS
6155 || (check_types
&& gfc_bt_struct (ref
->u
.c
.component
->ts
.type
)))
6156 && ref
->u
.c
.component
->attr
.flavor
!= FL_PROCEDURE
)
6158 declared
= ref
->u
.c
.component
->ts
.u
.derived
;
6164 if (declared
== NULL
)
6165 declared
= e
->symtree
->n
.sym
->ts
.u
.derived
;
6171 /* Given an EXPR_COMPCALL calling a GENERIC typebound procedure, figure out
6172 which of the specific bindings (if any) matches the arglist and transform
6173 the expression into a call of that binding. */
6176 resolve_typebound_generic_call (gfc_expr
* e
, const char **name
)
6178 gfc_typebound_proc
* genproc
;
6179 const char* genname
;
6181 gfc_symbol
*derived
;
6183 gcc_assert (e
->expr_type
== EXPR_COMPCALL
);
6184 genname
= e
->value
.compcall
.name
;
6185 genproc
= e
->value
.compcall
.tbp
;
6187 if (!genproc
->is_generic
)
6190 /* Try the bindings on this type and in the inheritance hierarchy. */
6191 for (; genproc
; genproc
= genproc
->overridden
)
6195 gcc_assert (genproc
->is_generic
);
6196 for (g
= genproc
->u
.generic
; g
; g
= g
->next
)
6199 gfc_actual_arglist
* args
;
6202 gcc_assert (g
->specific
);
6204 if (g
->specific
->error
)
6207 target
= g
->specific
->u
.specific
->n
.sym
;
6209 /* Get the right arglist by handling PASS/NOPASS. */
6210 args
= gfc_copy_actual_arglist (e
->value
.compcall
.actual
);
6211 if (!g
->specific
->nopass
)
6214 po
= extract_compcall_passed_object (e
);
6217 gfc_free_actual_arglist (args
);
6221 gcc_assert (g
->specific
->pass_arg_num
> 0);
6222 gcc_assert (!g
->specific
->error
);
6223 args
= update_arglist_pass (args
, po
, g
->specific
->pass_arg_num
,
6224 g
->specific
->pass_arg
);
6226 resolve_actual_arglist (args
, target
->attr
.proc
,
6227 is_external_proc (target
)
6228 && gfc_sym_get_dummy_args (target
) == NULL
);
6230 /* Check if this arglist matches the formal. */
6231 matches
= gfc_arglist_matches_symbol (&args
, target
);
6233 /* Clean up and break out of the loop if we've found it. */
6234 gfc_free_actual_arglist (args
);
6237 e
->value
.compcall
.tbp
= g
->specific
;
6238 genname
= g
->specific_st
->name
;
6239 /* Pass along the name for CLASS methods, where the vtab
6240 procedure pointer component has to be referenced. */
6248 /* Nothing matching found! */
6249 gfc_error ("Found no matching specific binding for the call to the GENERIC"
6250 " %qs at %L", genname
, &e
->where
);
6254 /* Make sure that we have the right specific instance for the name. */
6255 derived
= get_declared_from_expr (NULL
, NULL
, e
, true);
6257 st
= gfc_find_typebound_proc (derived
, NULL
, genname
, true, &e
->where
);
6259 e
->value
.compcall
.tbp
= st
->n
.tb
;
6265 /* Resolve a call to a type-bound subroutine. */
6268 resolve_typebound_call (gfc_code
* c
, const char **name
, bool *overridable
)
6270 gfc_actual_arglist
* newactual
;
6271 gfc_symtree
* target
;
6273 /* Check that's really a SUBROUTINE. */
6274 if (!c
->expr1
->value
.compcall
.tbp
->subroutine
)
6276 if (!c
->expr1
->value
.compcall
.tbp
->is_generic
6277 && c
->expr1
->value
.compcall
.tbp
->u
.specific
6278 && c
->expr1
->value
.compcall
.tbp
->u
.specific
->n
.sym
6279 && c
->expr1
->value
.compcall
.tbp
->u
.specific
->n
.sym
->attr
.subroutine
)
6280 c
->expr1
->value
.compcall
.tbp
->subroutine
= 1;
6283 gfc_error ("%qs at %L should be a SUBROUTINE",
6284 c
->expr1
->value
.compcall
.name
, &c
->loc
);
6289 if (!check_typebound_baseobject (c
->expr1
))
6292 /* Pass along the name for CLASS methods, where the vtab
6293 procedure pointer component has to be referenced. */
6295 *name
= c
->expr1
->value
.compcall
.name
;
6297 if (!resolve_typebound_generic_call (c
->expr1
, name
))
6300 /* Pass along the NON_OVERRIDABLE attribute of the specific TBP. */
6302 *overridable
= !c
->expr1
->value
.compcall
.tbp
->non_overridable
;
6304 /* Transform into an ordinary EXEC_CALL for now. */
6306 if (!resolve_typebound_static (c
->expr1
, &target
, &newactual
))
6309 c
->ext
.actual
= newactual
;
6310 c
->symtree
= target
;
6311 c
->op
= (c
->expr1
->value
.compcall
.assign
? EXEC_ASSIGN_CALL
: EXEC_CALL
);
6313 gcc_assert (!c
->expr1
->ref
&& !c
->expr1
->value
.compcall
.actual
);
6315 gfc_free_expr (c
->expr1
);
6316 c
->expr1
= gfc_get_expr ();
6317 c
->expr1
->expr_type
= EXPR_FUNCTION
;
6318 c
->expr1
->symtree
= target
;
6319 c
->expr1
->where
= c
->loc
;
6321 return resolve_call (c
);
6325 /* Resolve a component-call expression. */
6327 resolve_compcall (gfc_expr
* e
, const char **name
)
6329 gfc_actual_arglist
* newactual
;
6330 gfc_symtree
* target
;
6332 /* Check that's really a FUNCTION. */
6333 if (!e
->value
.compcall
.tbp
->function
)
6335 gfc_error ("%qs at %L should be a FUNCTION",
6336 e
->value
.compcall
.name
, &e
->where
);
6340 /* These must not be assign-calls! */
6341 gcc_assert (!e
->value
.compcall
.assign
);
6343 if (!check_typebound_baseobject (e
))
6346 /* Pass along the name for CLASS methods, where the vtab
6347 procedure pointer component has to be referenced. */
6349 *name
= e
->value
.compcall
.name
;
6351 if (!resolve_typebound_generic_call (e
, name
))
6353 gcc_assert (!e
->value
.compcall
.tbp
->is_generic
);
6355 /* Take the rank from the function's symbol. */
6356 if (e
->value
.compcall
.tbp
->u
.specific
->n
.sym
->as
)
6357 e
->rank
= e
->value
.compcall
.tbp
->u
.specific
->n
.sym
->as
->rank
;
6359 /* For now, we simply transform it into an EXPR_FUNCTION call with the same
6360 arglist to the TBP's binding target. */
6362 if (!resolve_typebound_static (e
, &target
, &newactual
))
6365 e
->value
.function
.actual
= newactual
;
6366 e
->value
.function
.name
= NULL
;
6367 e
->value
.function
.esym
= target
->n
.sym
;
6368 e
->value
.function
.isym
= NULL
;
6369 e
->symtree
= target
;
6370 e
->ts
= target
->n
.sym
->ts
;
6371 e
->expr_type
= EXPR_FUNCTION
;
6373 /* Resolution is not necessary if this is a class subroutine; this
6374 function only has to identify the specific proc. Resolution of
6375 the call will be done next in resolve_typebound_call. */
6376 return gfc_resolve_expr (e
);
6380 static bool resolve_fl_derived (gfc_symbol
*sym
);
6383 /* Resolve a typebound function, or 'method'. First separate all
6384 the non-CLASS references by calling resolve_compcall directly. */
6387 resolve_typebound_function (gfc_expr
* e
)
6389 gfc_symbol
*declared
;
6401 /* Deal with typebound operators for CLASS objects. */
6402 expr
= e
->value
.compcall
.base_object
;
6403 overridable
= !e
->value
.compcall
.tbp
->non_overridable
;
6404 if (expr
&& expr
->ts
.type
== BT_CLASS
&& e
->value
.compcall
.name
)
6406 /* If the base_object is not a variable, the corresponding actual
6407 argument expression must be stored in e->base_expression so
6408 that the corresponding tree temporary can be used as the base
6409 object in gfc_conv_procedure_call. */
6410 if (expr
->expr_type
!= EXPR_VARIABLE
)
6412 gfc_actual_arglist
*args
;
6414 for (args
= e
->value
.function
.actual
; args
; args
= args
->next
)
6416 if (expr
== args
->expr
)
6421 /* Since the typebound operators are generic, we have to ensure
6422 that any delays in resolution are corrected and that the vtab
6425 declared
= ts
.u
.derived
;
6426 c
= gfc_find_component (declared
, "_vptr", true, true, NULL
);
6427 if (c
->ts
.u
.derived
== NULL
)
6428 c
->ts
.u
.derived
= gfc_find_derived_vtab (declared
);
6430 if (!resolve_compcall (e
, &name
))
6433 /* Use the generic name if it is there. */
6434 name
= name
? name
: e
->value
.function
.esym
->name
;
6435 e
->symtree
= expr
->symtree
;
6436 e
->ref
= gfc_copy_ref (expr
->ref
);
6437 get_declared_from_expr (&class_ref
, NULL
, e
, false);
6439 /* Trim away the extraneous references that emerge from nested
6440 use of interface.c (extend_expr). */
6441 if (class_ref
&& class_ref
->next
)
6443 gfc_free_ref_list (class_ref
->next
);
6444 class_ref
->next
= NULL
;
6446 else if (e
->ref
&& !class_ref
&& expr
->ts
.type
!= BT_CLASS
)
6448 gfc_free_ref_list (e
->ref
);
6452 gfc_add_vptr_component (e
);
6453 gfc_add_component_ref (e
, name
);
6454 e
->value
.function
.esym
= NULL
;
6455 if (expr
->expr_type
!= EXPR_VARIABLE
)
6456 e
->base_expr
= expr
;
6461 return resolve_compcall (e
, NULL
);
6463 if (!resolve_ref (e
))
6466 /* Get the CLASS declared type. */
6467 declared
= get_declared_from_expr (&class_ref
, &new_ref
, e
, true);
6469 if (!resolve_fl_derived (declared
))
6472 /* Weed out cases of the ultimate component being a derived type. */
6473 if ((class_ref
&& gfc_bt_struct (class_ref
->u
.c
.component
->ts
.type
))
6474 || (!class_ref
&& st
->n
.sym
->ts
.type
!= BT_CLASS
))
6476 gfc_free_ref_list (new_ref
);
6477 return resolve_compcall (e
, NULL
);
6480 c
= gfc_find_component (declared
, "_data", true, true, NULL
);
6481 declared
= c
->ts
.u
.derived
;
6483 /* Treat the call as if it is a typebound procedure, in order to roll
6484 out the correct name for the specific function. */
6485 if (!resolve_compcall (e
, &name
))
6487 gfc_free_ref_list (new_ref
);
6494 /* Convert the expression to a procedure pointer component call. */
6495 e
->value
.function
.esym
= NULL
;
6501 /* '_vptr' points to the vtab, which contains the procedure pointers. */
6502 gfc_add_vptr_component (e
);
6503 gfc_add_component_ref (e
, name
);
6505 /* Recover the typespec for the expression. This is really only
6506 necessary for generic procedures, where the additional call
6507 to gfc_add_component_ref seems to throw the collection of the
6508 correct typespec. */
6512 gfc_free_ref_list (new_ref
);
6517 /* Resolve a typebound subroutine, or 'method'. First separate all
6518 the non-CLASS references by calling resolve_typebound_call
6522 resolve_typebound_subroutine (gfc_code
*code
)
6524 gfc_symbol
*declared
;
6534 st
= code
->expr1
->symtree
;
6536 /* Deal with typebound operators for CLASS objects. */
6537 expr
= code
->expr1
->value
.compcall
.base_object
;
6538 overridable
= !code
->expr1
->value
.compcall
.tbp
->non_overridable
;
6539 if (expr
&& expr
->ts
.type
== BT_CLASS
&& code
->expr1
->value
.compcall
.name
)
6541 /* If the base_object is not a variable, the corresponding actual
6542 argument expression must be stored in e->base_expression so
6543 that the corresponding tree temporary can be used as the base
6544 object in gfc_conv_procedure_call. */
6545 if (expr
->expr_type
!= EXPR_VARIABLE
)
6547 gfc_actual_arglist
*args
;
6549 args
= code
->expr1
->value
.function
.actual
;
6550 for (; args
; args
= args
->next
)
6551 if (expr
== args
->expr
)
6555 /* Since the typebound operators are generic, we have to ensure
6556 that any delays in resolution are corrected and that the vtab
6558 declared
= expr
->ts
.u
.derived
;
6559 c
= gfc_find_component (declared
, "_vptr", true, true, NULL
);
6560 if (c
->ts
.u
.derived
== NULL
)
6561 c
->ts
.u
.derived
= gfc_find_derived_vtab (declared
);
6563 if (!resolve_typebound_call (code
, &name
, NULL
))
6566 /* Use the generic name if it is there. */
6567 name
= name
? name
: code
->expr1
->value
.function
.esym
->name
;
6568 code
->expr1
->symtree
= expr
->symtree
;
6569 code
->expr1
->ref
= gfc_copy_ref (expr
->ref
);
6571 /* Trim away the extraneous references that emerge from nested
6572 use of interface.c (extend_expr). */
6573 get_declared_from_expr (&class_ref
, NULL
, code
->expr1
, false);
6574 if (class_ref
&& class_ref
->next
)
6576 gfc_free_ref_list (class_ref
->next
);
6577 class_ref
->next
= NULL
;
6579 else if (code
->expr1
->ref
&& !class_ref
)
6581 gfc_free_ref_list (code
->expr1
->ref
);
6582 code
->expr1
->ref
= NULL
;
6585 /* Now use the procedure in the vtable. */
6586 gfc_add_vptr_component (code
->expr1
);
6587 gfc_add_component_ref (code
->expr1
, name
);
6588 code
->expr1
->value
.function
.esym
= NULL
;
6589 if (expr
->expr_type
!= EXPR_VARIABLE
)
6590 code
->expr1
->base_expr
= expr
;
6595 return resolve_typebound_call (code
, NULL
, NULL
);
6597 if (!resolve_ref (code
->expr1
))
6600 /* Get the CLASS declared type. */
6601 get_declared_from_expr (&class_ref
, &new_ref
, code
->expr1
, true);
6603 /* Weed out cases of the ultimate component being a derived type. */
6604 if ((class_ref
&& gfc_bt_struct (class_ref
->u
.c
.component
->ts
.type
))
6605 || (!class_ref
&& st
->n
.sym
->ts
.type
!= BT_CLASS
))
6607 gfc_free_ref_list (new_ref
);
6608 return resolve_typebound_call (code
, NULL
, NULL
);
6611 if (!resolve_typebound_call (code
, &name
, &overridable
))
6613 gfc_free_ref_list (new_ref
);
6616 ts
= code
->expr1
->ts
;
6620 /* Convert the expression to a procedure pointer component call. */
6621 code
->expr1
->value
.function
.esym
= NULL
;
6622 code
->expr1
->symtree
= st
;
6625 code
->expr1
->ref
= new_ref
;
6627 /* '_vptr' points to the vtab, which contains the procedure pointers. */
6628 gfc_add_vptr_component (code
->expr1
);
6629 gfc_add_component_ref (code
->expr1
, name
);
6631 /* Recover the typespec for the expression. This is really only
6632 necessary for generic procedures, where the additional call
6633 to gfc_add_component_ref seems to throw the collection of the
6634 correct typespec. */
6635 code
->expr1
->ts
= ts
;
6638 gfc_free_ref_list (new_ref
);
6644 /* Resolve a CALL to a Procedure Pointer Component (Subroutine). */
6647 resolve_ppc_call (gfc_code
* c
)
6649 gfc_component
*comp
;
6651 comp
= gfc_get_proc_ptr_comp (c
->expr1
);
6652 gcc_assert (comp
!= NULL
);
6654 c
->resolved_sym
= c
->expr1
->symtree
->n
.sym
;
6655 c
->expr1
->expr_type
= EXPR_VARIABLE
;
6657 if (!comp
->attr
.subroutine
)
6658 gfc_add_subroutine (&comp
->attr
, comp
->name
, &c
->expr1
->where
);
6660 if (!resolve_ref (c
->expr1
))
6663 if (!update_ppc_arglist (c
->expr1
))
6666 c
->ext
.actual
= c
->expr1
->value
.compcall
.actual
;
6668 if (!resolve_actual_arglist (c
->ext
.actual
, comp
->attr
.proc
,
6669 !(comp
->ts
.interface
6670 && comp
->ts
.interface
->formal
)))
6673 if (!pure_subroutine (comp
->ts
.interface
, comp
->name
, &c
->expr1
->where
))
6676 gfc_ppc_use (comp
, &c
->expr1
->value
.compcall
.actual
, &c
->expr1
->where
);
6682 /* Resolve a Function Call to a Procedure Pointer Component (Function). */
6685 resolve_expr_ppc (gfc_expr
* e
)
6687 gfc_component
*comp
;
6689 comp
= gfc_get_proc_ptr_comp (e
);
6690 gcc_assert (comp
!= NULL
);
6692 /* Convert to EXPR_FUNCTION. */
6693 e
->expr_type
= EXPR_FUNCTION
;
6694 e
->value
.function
.isym
= NULL
;
6695 e
->value
.function
.actual
= e
->value
.compcall
.actual
;
6697 if (comp
->as
!= NULL
)
6698 e
->rank
= comp
->as
->rank
;
6700 if (!comp
->attr
.function
)
6701 gfc_add_function (&comp
->attr
, comp
->name
, &e
->where
);
6703 if (!resolve_ref (e
))
6706 if (!resolve_actual_arglist (e
->value
.function
.actual
, comp
->attr
.proc
,
6707 !(comp
->ts
.interface
6708 && comp
->ts
.interface
->formal
)))
6711 if (!update_ppc_arglist (e
))
6714 if (!check_pure_function(e
))
6717 gfc_ppc_use (comp
, &e
->value
.compcall
.actual
, &e
->where
);
6724 gfc_is_expandable_expr (gfc_expr
*e
)
6726 gfc_constructor
*con
;
6728 if (e
->expr_type
== EXPR_ARRAY
)
6730 /* Traverse the constructor looking for variables that are flavor
6731 parameter. Parameters must be expanded since they are fully used at
6733 con
= gfc_constructor_first (e
->value
.constructor
);
6734 for (; con
; con
= gfc_constructor_next (con
))
6736 if (con
->expr
->expr_type
== EXPR_VARIABLE
6737 && con
->expr
->symtree
6738 && (con
->expr
->symtree
->n
.sym
->attr
.flavor
== FL_PARAMETER
6739 || con
->expr
->symtree
->n
.sym
->attr
.flavor
== FL_VARIABLE
))
6741 if (con
->expr
->expr_type
== EXPR_ARRAY
6742 && gfc_is_expandable_expr (con
->expr
))
6751 /* Sometimes variables in specification expressions of the result
6752 of module procedures in submodules wind up not being the 'real'
6753 dummy. Find this, if possible, in the namespace of the first
6757 fixup_unique_dummy (gfc_expr
*e
)
6759 gfc_symtree
*st
= NULL
;
6760 gfc_symbol
*s
= NULL
;
6762 if (e
->symtree
->n
.sym
->ns
->proc_name
6763 && e
->symtree
->n
.sym
->ns
->proc_name
->formal
)
6764 s
= e
->symtree
->n
.sym
->ns
->proc_name
->formal
->sym
;
6767 st
= gfc_find_symtree (s
->ns
->sym_root
, e
->symtree
->n
.sym
->name
);
6770 && st
->n
.sym
!= NULL
6771 && st
->n
.sym
->attr
.dummy
)
6775 /* Resolve an expression. That is, make sure that types of operands agree
6776 with their operators, intrinsic operators are converted to function calls
6777 for overloaded types and unresolved function references are resolved. */
6780 gfc_resolve_expr (gfc_expr
*e
)
6783 bool inquiry_save
, actual_arg_save
, first_actual_arg_save
;
6788 /* inquiry_argument only applies to variables. */
6789 inquiry_save
= inquiry_argument
;
6790 actual_arg_save
= actual_arg
;
6791 first_actual_arg_save
= first_actual_arg
;
6793 if (e
->expr_type
!= EXPR_VARIABLE
)
6795 inquiry_argument
= false;
6797 first_actual_arg
= false;
6799 else if (e
->symtree
!= NULL
6800 && *e
->symtree
->name
== '@'
6801 && e
->symtree
->n
.sym
->attr
.dummy
)
6803 /* Deal with submodule specification expressions that are not
6804 found to be referenced in module.c(read_cleanup). */
6805 fixup_unique_dummy (e
);
6808 switch (e
->expr_type
)
6811 t
= resolve_operator (e
);
6817 if (check_host_association (e
))
6818 t
= resolve_function (e
);
6820 t
= resolve_variable (e
);
6822 if (e
->ts
.type
== BT_CHARACTER
&& e
->ts
.u
.cl
== NULL
&& e
->ref
6823 && e
->ref
->type
!= REF_SUBSTRING
)
6824 gfc_resolve_substring_charlen (e
);
6829 t
= resolve_typebound_function (e
);
6832 case EXPR_SUBSTRING
:
6833 t
= resolve_ref (e
);
6842 t
= resolve_expr_ppc (e
);
6847 if (!resolve_ref (e
))
6850 t
= gfc_resolve_array_constructor (e
);
6851 /* Also try to expand a constructor. */
6854 expression_rank (e
);
6855 if (gfc_is_constant_expr (e
) || gfc_is_expandable_expr (e
))
6856 gfc_expand_constructor (e
, false);
6859 /* This provides the opportunity for the length of constructors with
6860 character valued function elements to propagate the string length
6861 to the expression. */
6862 if (t
&& e
->ts
.type
== BT_CHARACTER
)
6864 /* For efficiency, we call gfc_expand_constructor for BT_CHARACTER
6865 here rather then add a duplicate test for it above. */
6866 gfc_expand_constructor (e
, false);
6867 t
= gfc_resolve_character_array_constructor (e
);
6872 case EXPR_STRUCTURE
:
6873 t
= resolve_ref (e
);
6877 t
= resolve_structure_cons (e
, 0);
6881 t
= gfc_simplify_expr (e
, 0);
6885 gfc_internal_error ("gfc_resolve_expr(): Bad expression type");
6888 if (e
->ts
.type
== BT_CHARACTER
&& t
&& !e
->ts
.u
.cl
)
6891 inquiry_argument
= inquiry_save
;
6892 actual_arg
= actual_arg_save
;
6893 first_actual_arg
= first_actual_arg_save
;
6899 /* Resolve an expression from an iterator. They must be scalar and have
6900 INTEGER or (optionally) REAL type. */
6903 gfc_resolve_iterator_expr (gfc_expr
*expr
, bool real_ok
,
6904 const char *name_msgid
)
6906 if (!gfc_resolve_expr (expr
))
6909 if (expr
->rank
!= 0)
6911 gfc_error ("%s at %L must be a scalar", _(name_msgid
), &expr
->where
);
6915 if (expr
->ts
.type
!= BT_INTEGER
)
6917 if (expr
->ts
.type
== BT_REAL
)
6920 return gfc_notify_std (GFC_STD_F95_DEL
,
6921 "%s at %L must be integer",
6922 _(name_msgid
), &expr
->where
);
6925 gfc_error ("%s at %L must be INTEGER", _(name_msgid
),
6932 gfc_error ("%s at %L must be INTEGER", _(name_msgid
), &expr
->where
);
6940 /* Resolve the expressions in an iterator structure. If REAL_OK is
6941 false allow only INTEGER type iterators, otherwise allow REAL types.
6942 Set own_scope to true for ac-implied-do and data-implied-do as those
6943 have a separate scope such that, e.g., a INTENT(IN) doesn't apply. */
6946 gfc_resolve_iterator (gfc_iterator
*iter
, bool real_ok
, bool own_scope
)
6948 if (!gfc_resolve_iterator_expr (iter
->var
, real_ok
, "Loop variable"))
6951 if (!gfc_check_vardef_context (iter
->var
, false, false, own_scope
,
6952 _("iterator variable")))
6955 if (!gfc_resolve_iterator_expr (iter
->start
, real_ok
,
6956 "Start expression in DO loop"))
6959 if (!gfc_resolve_iterator_expr (iter
->end
, real_ok
,
6960 "End expression in DO loop"))
6963 if (!gfc_resolve_iterator_expr (iter
->step
, real_ok
,
6964 "Step expression in DO loop"))
6967 if (iter
->step
->expr_type
== EXPR_CONSTANT
)
6969 if ((iter
->step
->ts
.type
== BT_INTEGER
6970 && mpz_cmp_ui (iter
->step
->value
.integer
, 0) == 0)
6971 || (iter
->step
->ts
.type
== BT_REAL
6972 && mpfr_sgn (iter
->step
->value
.real
) == 0))
6974 gfc_error ("Step expression in DO loop at %L cannot be zero",
6975 &iter
->step
->where
);
6980 /* Convert start, end, and step to the same type as var. */
6981 if (iter
->start
->ts
.kind
!= iter
->var
->ts
.kind
6982 || iter
->start
->ts
.type
!= iter
->var
->ts
.type
)
6983 gfc_convert_type (iter
->start
, &iter
->var
->ts
, 1);
6985 if (iter
->end
->ts
.kind
!= iter
->var
->ts
.kind
6986 || iter
->end
->ts
.type
!= iter
->var
->ts
.type
)
6987 gfc_convert_type (iter
->end
, &iter
->var
->ts
, 1);
6989 if (iter
->step
->ts
.kind
!= iter
->var
->ts
.kind
6990 || iter
->step
->ts
.type
!= iter
->var
->ts
.type
)
6991 gfc_convert_type (iter
->step
, &iter
->var
->ts
, 1);
6993 if (iter
->start
->expr_type
== EXPR_CONSTANT
6994 && iter
->end
->expr_type
== EXPR_CONSTANT
6995 && iter
->step
->expr_type
== EXPR_CONSTANT
)
6998 if (iter
->start
->ts
.type
== BT_INTEGER
)
7000 sgn
= mpz_cmp_ui (iter
->step
->value
.integer
, 0);
7001 cmp
= mpz_cmp (iter
->end
->value
.integer
, iter
->start
->value
.integer
);
7005 sgn
= mpfr_sgn (iter
->step
->value
.real
);
7006 cmp
= mpfr_cmp (iter
->end
->value
.real
, iter
->start
->value
.real
);
7008 if (warn_zerotrip
&& ((sgn
> 0 && cmp
< 0) || (sgn
< 0 && cmp
> 0)))
7009 gfc_warning (OPT_Wzerotrip
,
7010 "DO loop at %L will be executed zero times",
7011 &iter
->step
->where
);
7014 if (iter
->end
->expr_type
== EXPR_CONSTANT
7015 && iter
->end
->ts
.type
== BT_INTEGER
7016 && iter
->step
->expr_type
== EXPR_CONSTANT
7017 && iter
->step
->ts
.type
== BT_INTEGER
7018 && (mpz_cmp_si (iter
->step
->value
.integer
, -1L) == 0
7019 || mpz_cmp_si (iter
->step
->value
.integer
, 1L) == 0))
7021 bool is_step_positive
= mpz_cmp_ui (iter
->step
->value
.integer
, 1) == 0;
7022 int k
= gfc_validate_kind (BT_INTEGER
, iter
->end
->ts
.kind
, false);
7024 if (is_step_positive
7025 && mpz_cmp (iter
->end
->value
.integer
, gfc_integer_kinds
[k
].huge
) == 0)
7026 gfc_warning (OPT_Wundefined_do_loop
,
7027 "DO loop at %L is undefined as it overflows",
7028 &iter
->step
->where
);
7029 else if (!is_step_positive
7030 && mpz_cmp (iter
->end
->value
.integer
,
7031 gfc_integer_kinds
[k
].min_int
) == 0)
7032 gfc_warning (OPT_Wundefined_do_loop
,
7033 "DO loop at %L is undefined as it underflows",
7034 &iter
->step
->where
);
7041 /* Traversal function for find_forall_index. f == 2 signals that
7042 that variable itself is not to be checked - only the references. */
7045 forall_index (gfc_expr
*expr
, gfc_symbol
*sym
, int *f
)
7047 if (expr
->expr_type
!= EXPR_VARIABLE
)
7050 /* A scalar assignment */
7051 if (!expr
->ref
|| *f
== 1)
7053 if (expr
->symtree
->n
.sym
== sym
)
7065 /* Check whether the FORALL index appears in the expression or not.
7066 Returns true if SYM is found in EXPR. */
7069 find_forall_index (gfc_expr
*expr
, gfc_symbol
*sym
, int f
)
7071 if (gfc_traverse_expr (expr
, sym
, forall_index
, f
))
7078 /* Resolve a list of FORALL iterators. The FORALL index-name is constrained
7079 to be a scalar INTEGER variable. The subscripts and stride are scalar
7080 INTEGERs, and if stride is a constant it must be nonzero.
7081 Furthermore "A subscript or stride in a forall-triplet-spec shall
7082 not contain a reference to any index-name in the
7083 forall-triplet-spec-list in which it appears." (7.5.4.1) */
7086 resolve_forall_iterators (gfc_forall_iterator
*it
)
7088 gfc_forall_iterator
*iter
, *iter2
;
7090 for (iter
= it
; iter
; iter
= iter
->next
)
7092 if (gfc_resolve_expr (iter
->var
)
7093 && (iter
->var
->ts
.type
!= BT_INTEGER
|| iter
->var
->rank
!= 0))
7094 gfc_error ("FORALL index-name at %L must be a scalar INTEGER",
7097 if (gfc_resolve_expr (iter
->start
)
7098 && (iter
->start
->ts
.type
!= BT_INTEGER
|| iter
->start
->rank
!= 0))
7099 gfc_error ("FORALL start expression at %L must be a scalar INTEGER",
7100 &iter
->start
->where
);
7101 if (iter
->var
->ts
.kind
!= iter
->start
->ts
.kind
)
7102 gfc_convert_type (iter
->start
, &iter
->var
->ts
, 1);
7104 if (gfc_resolve_expr (iter
->end
)
7105 && (iter
->end
->ts
.type
!= BT_INTEGER
|| iter
->end
->rank
!= 0))
7106 gfc_error ("FORALL end expression at %L must be a scalar INTEGER",
7108 if (iter
->var
->ts
.kind
!= iter
->end
->ts
.kind
)
7109 gfc_convert_type (iter
->end
, &iter
->var
->ts
, 1);
7111 if (gfc_resolve_expr (iter
->stride
))
7113 if (iter
->stride
->ts
.type
!= BT_INTEGER
|| iter
->stride
->rank
!= 0)
7114 gfc_error ("FORALL stride expression at %L must be a scalar %s",
7115 &iter
->stride
->where
, "INTEGER");
7117 if (iter
->stride
->expr_type
== EXPR_CONSTANT
7118 && mpz_cmp_ui (iter
->stride
->value
.integer
, 0) == 0)
7119 gfc_error ("FORALL stride expression at %L cannot be zero",
7120 &iter
->stride
->where
);
7122 if (iter
->var
->ts
.kind
!= iter
->stride
->ts
.kind
)
7123 gfc_convert_type (iter
->stride
, &iter
->var
->ts
, 1);
7126 for (iter
= it
; iter
; iter
= iter
->next
)
7127 for (iter2
= iter
; iter2
; iter2
= iter2
->next
)
7129 if (find_forall_index (iter2
->start
, iter
->var
->symtree
->n
.sym
, 0)
7130 || find_forall_index (iter2
->end
, iter
->var
->symtree
->n
.sym
, 0)
7131 || find_forall_index (iter2
->stride
, iter
->var
->symtree
->n
.sym
, 0))
7132 gfc_error ("FORALL index %qs may not appear in triplet "
7133 "specification at %L", iter
->var
->symtree
->name
,
7134 &iter2
->start
->where
);
7139 /* Given a pointer to a symbol that is a derived type, see if it's
7140 inaccessible, i.e. if it's defined in another module and the components are
7141 PRIVATE. The search is recursive if necessary. Returns zero if no
7142 inaccessible components are found, nonzero otherwise. */
7145 derived_inaccessible (gfc_symbol
*sym
)
7149 if (sym
->attr
.use_assoc
&& sym
->attr
.private_comp
)
7152 for (c
= sym
->components
; c
; c
= c
->next
)
7154 /* Prevent an infinite loop through this function. */
7155 if (c
->ts
.type
== BT_DERIVED
&& c
->attr
.pointer
7156 && sym
== c
->ts
.u
.derived
)
7159 if (c
->ts
.type
== BT_DERIVED
&& derived_inaccessible (c
->ts
.u
.derived
))
7167 /* Resolve the argument of a deallocate expression. The expression must be
7168 a pointer or a full array. */
7171 resolve_deallocate_expr (gfc_expr
*e
)
7173 symbol_attribute attr
;
7174 int allocatable
, pointer
;
7180 if (!gfc_resolve_expr (e
))
7183 if (e
->expr_type
!= EXPR_VARIABLE
)
7186 sym
= e
->symtree
->n
.sym
;
7187 unlimited
= UNLIMITED_POLY(sym
);
7189 if (sym
->ts
.type
== BT_CLASS
)
7191 allocatable
= CLASS_DATA (sym
)->attr
.allocatable
;
7192 pointer
= CLASS_DATA (sym
)->attr
.class_pointer
;
7196 allocatable
= sym
->attr
.allocatable
;
7197 pointer
= sym
->attr
.pointer
;
7199 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
7204 if (ref
->u
.ar
.type
!= AR_FULL
7205 && !(ref
->u
.ar
.type
== AR_ELEMENT
&& ref
->u
.ar
.as
->rank
== 0
7206 && ref
->u
.ar
.codimen
&& gfc_ref_this_image (ref
)))
7211 c
= ref
->u
.c
.component
;
7212 if (c
->ts
.type
== BT_CLASS
)
7214 allocatable
= CLASS_DATA (c
)->attr
.allocatable
;
7215 pointer
= CLASS_DATA (c
)->attr
.class_pointer
;
7219 allocatable
= c
->attr
.allocatable
;
7220 pointer
= c
->attr
.pointer
;
7230 attr
= gfc_expr_attr (e
);
7232 if (allocatable
== 0 && attr
.pointer
== 0 && !unlimited
)
7235 gfc_error ("Allocate-object at %L must be ALLOCATABLE or a POINTER",
7241 if (gfc_is_coindexed (e
))
7243 gfc_error ("Coindexed allocatable object at %L", &e
->where
);
7248 && !gfc_check_vardef_context (e
, true, true, false,
7249 _("DEALLOCATE object")))
7251 if (!gfc_check_vardef_context (e
, false, true, false,
7252 _("DEALLOCATE object")))
7259 /* Returns true if the expression e contains a reference to the symbol sym. */
7261 sym_in_expr (gfc_expr
*e
, gfc_symbol
*sym
, int *f ATTRIBUTE_UNUSED
)
7263 if (e
->expr_type
== EXPR_VARIABLE
&& e
->symtree
->n
.sym
== sym
)
7270 gfc_find_sym_in_expr (gfc_symbol
*sym
, gfc_expr
*e
)
7272 return gfc_traverse_expr (e
, sym
, sym_in_expr
, 0);
7276 /* Given the expression node e for an allocatable/pointer of derived type to be
7277 allocated, get the expression node to be initialized afterwards (needed for
7278 derived types with default initializers, and derived types with allocatable
7279 components that need nullification.) */
7282 gfc_expr_to_initialize (gfc_expr
*e
)
7288 result
= gfc_copy_expr (e
);
7290 /* Change the last array reference from AR_ELEMENT to AR_FULL. */
7291 for (ref
= result
->ref
; ref
; ref
= ref
->next
)
7292 if (ref
->type
== REF_ARRAY
&& ref
->next
== NULL
)
7294 ref
->u
.ar
.type
= AR_FULL
;
7296 for (i
= 0; i
< ref
->u
.ar
.dimen
; i
++)
7297 ref
->u
.ar
.start
[i
] = ref
->u
.ar
.end
[i
] = ref
->u
.ar
.stride
[i
] = NULL
;
7302 gfc_free_shape (&result
->shape
, result
->rank
);
7304 /* Recalculate rank, shape, etc. */
7305 gfc_resolve_expr (result
);
7310 /* If the last ref of an expression is an array ref, return a copy of the
7311 expression with that one removed. Otherwise, a copy of the original
7312 expression. This is used for allocate-expressions and pointer assignment
7313 LHS, where there may be an array specification that needs to be stripped
7314 off when using gfc_check_vardef_context. */
7317 remove_last_array_ref (gfc_expr
* e
)
7322 e2
= gfc_copy_expr (e
);
7323 for (r
= &e2
->ref
; *r
; r
= &(*r
)->next
)
7324 if ((*r
)->type
== REF_ARRAY
&& !(*r
)->next
)
7326 gfc_free_ref_list (*r
);
7335 /* Used in resolve_allocate_expr to check that a allocation-object and
7336 a source-expr are conformable. This does not catch all possible
7337 cases; in particular a runtime checking is needed. */
7340 conformable_arrays (gfc_expr
*e1
, gfc_expr
*e2
)
7343 for (tail
= e2
->ref
; tail
&& tail
->next
; tail
= tail
->next
);
7345 /* First compare rank. */
7346 if ((tail
&& e1
->rank
!= tail
->u
.ar
.as
->rank
)
7347 || (!tail
&& e1
->rank
!= e2
->rank
))
7349 gfc_error ("Source-expr at %L must be scalar or have the "
7350 "same rank as the allocate-object at %L",
7351 &e1
->where
, &e2
->where
);
7362 for (i
= 0; i
< e1
->rank
; i
++)
7364 if (tail
->u
.ar
.start
[i
] == NULL
)
7367 if (tail
->u
.ar
.end
[i
])
7369 mpz_set (s
, tail
->u
.ar
.end
[i
]->value
.integer
);
7370 mpz_sub (s
, s
, tail
->u
.ar
.start
[i
]->value
.integer
);
7371 mpz_add_ui (s
, s
, 1);
7375 mpz_set (s
, tail
->u
.ar
.start
[i
]->value
.integer
);
7378 if (mpz_cmp (e1
->shape
[i
], s
) != 0)
7380 gfc_error ("Source-expr at %L and allocate-object at %L must "
7381 "have the same shape", &e1
->where
, &e2
->where
);
7394 /* Resolve the expression in an ALLOCATE statement, doing the additional
7395 checks to see whether the expression is OK or not. The expression must
7396 have a trailing array reference that gives the size of the array. */
7399 resolve_allocate_expr (gfc_expr
*e
, gfc_code
*code
, bool *array_alloc_wo_spec
)
7401 int i
, pointer
, allocatable
, dimension
, is_abstract
;
7405 symbol_attribute attr
;
7406 gfc_ref
*ref
, *ref2
;
7409 gfc_symbol
*sym
= NULL
;
7414 /* Mark the utmost array component as being in allocate to allow DIMEN_STAR
7415 checking of coarrays. */
7416 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
7417 if (ref
->next
== NULL
)
7420 if (ref
&& ref
->type
== REF_ARRAY
)
7421 ref
->u
.ar
.in_allocate
= true;
7423 if (!gfc_resolve_expr (e
))
7426 /* Make sure the expression is allocatable or a pointer. If it is
7427 pointer, the next-to-last reference must be a pointer. */
7431 sym
= e
->symtree
->n
.sym
;
7433 /* Check whether ultimate component is abstract and CLASS. */
7436 /* Is the allocate-object unlimited polymorphic? */
7437 unlimited
= UNLIMITED_POLY(e
);
7439 if (e
->expr_type
!= EXPR_VARIABLE
)
7442 attr
= gfc_expr_attr (e
);
7443 pointer
= attr
.pointer
;
7444 dimension
= attr
.dimension
;
7445 codimension
= attr
.codimension
;
7449 if (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
))
7451 allocatable
= CLASS_DATA (sym
)->attr
.allocatable
;
7452 pointer
= CLASS_DATA (sym
)->attr
.class_pointer
;
7453 dimension
= CLASS_DATA (sym
)->attr
.dimension
;
7454 codimension
= CLASS_DATA (sym
)->attr
.codimension
;
7455 is_abstract
= CLASS_DATA (sym
)->attr
.abstract
;
7459 allocatable
= sym
->attr
.allocatable
;
7460 pointer
= sym
->attr
.pointer
;
7461 dimension
= sym
->attr
.dimension
;
7462 codimension
= sym
->attr
.codimension
;
7467 for (ref
= e
->ref
; ref
; ref2
= ref
, ref
= ref
->next
)
7472 if (ref
->u
.ar
.codimen
> 0)
7475 for (n
= ref
->u
.ar
.dimen
;
7476 n
< ref
->u
.ar
.dimen
+ ref
->u
.ar
.codimen
; n
++)
7477 if (ref
->u
.ar
.dimen_type
[n
] != DIMEN_THIS_IMAGE
)
7484 if (ref
->next
!= NULL
)
7492 gfc_error ("Coindexed allocatable object at %L",
7497 c
= ref
->u
.c
.component
;
7498 if (c
->ts
.type
== BT_CLASS
)
7500 allocatable
= CLASS_DATA (c
)->attr
.allocatable
;
7501 pointer
= CLASS_DATA (c
)->attr
.class_pointer
;
7502 dimension
= CLASS_DATA (c
)->attr
.dimension
;
7503 codimension
= CLASS_DATA (c
)->attr
.codimension
;
7504 is_abstract
= CLASS_DATA (c
)->attr
.abstract
;
7508 allocatable
= c
->attr
.allocatable
;
7509 pointer
= c
->attr
.pointer
;
7510 dimension
= c
->attr
.dimension
;
7511 codimension
= c
->attr
.codimension
;
7512 is_abstract
= c
->attr
.abstract
;
7524 /* Check for F08:C628. */
7525 if (allocatable
== 0 && pointer
== 0 && !unlimited
)
7527 gfc_error ("Allocate-object at %L must be ALLOCATABLE or a POINTER",
7532 /* Some checks for the SOURCE tag. */
7535 /* Check F03:C631. */
7536 if (!gfc_type_compatible (&e
->ts
, &code
->expr3
->ts
))
7538 gfc_error ("Type of entity at %L is type incompatible with "
7539 "source-expr at %L", &e
->where
, &code
->expr3
->where
);
7543 /* Check F03:C632 and restriction following Note 6.18. */
7544 if (code
->expr3
->rank
> 0 && !conformable_arrays (code
->expr3
, e
))
7547 /* Check F03:C633. */
7548 if (code
->expr3
->ts
.kind
!= e
->ts
.kind
&& !unlimited
)
7550 gfc_error ("The allocate-object at %L and the source-expr at %L "
7551 "shall have the same kind type parameter",
7552 &e
->where
, &code
->expr3
->where
);
7556 /* Check F2008, C642. */
7557 if (code
->expr3
->ts
.type
== BT_DERIVED
7558 && ((codimension
&& gfc_expr_attr (code
->expr3
).lock_comp
)
7559 || (code
->expr3
->ts
.u
.derived
->from_intmod
7560 == INTMOD_ISO_FORTRAN_ENV
7561 && code
->expr3
->ts
.u
.derived
->intmod_sym_id
7562 == ISOFORTRAN_LOCK_TYPE
)))
7564 gfc_error ("The source-expr at %L shall neither be of type "
7565 "LOCK_TYPE nor have a LOCK_TYPE component if "
7566 "allocate-object at %L is a coarray",
7567 &code
->expr3
->where
, &e
->where
);
7571 /* Check TS18508, C702/C703. */
7572 if (code
->expr3
->ts
.type
== BT_DERIVED
7573 && ((codimension
&& gfc_expr_attr (code
->expr3
).event_comp
)
7574 || (code
->expr3
->ts
.u
.derived
->from_intmod
7575 == INTMOD_ISO_FORTRAN_ENV
7576 && code
->expr3
->ts
.u
.derived
->intmod_sym_id
7577 == ISOFORTRAN_EVENT_TYPE
)))
7579 gfc_error ("The source-expr at %L shall neither be of type "
7580 "EVENT_TYPE nor have a EVENT_TYPE component if "
7581 "allocate-object at %L is a coarray",
7582 &code
->expr3
->where
, &e
->where
);
7587 /* Check F08:C629. */
7588 if (is_abstract
&& code
->ext
.alloc
.ts
.type
== BT_UNKNOWN
7591 gcc_assert (e
->ts
.type
== BT_CLASS
);
7592 gfc_error ("Allocating %s of ABSTRACT base type at %L requires a "
7593 "type-spec or source-expr", sym
->name
, &e
->where
);
7597 /* Check F08:C632. */
7598 if (code
->ext
.alloc
.ts
.type
== BT_CHARACTER
&& !e
->ts
.deferred
7599 && !UNLIMITED_POLY (e
))
7603 if (!e
->ts
.u
.cl
->length
)
7606 cmp
= gfc_dep_compare_expr (e
->ts
.u
.cl
->length
,
7607 code
->ext
.alloc
.ts
.u
.cl
->length
);
7608 if (cmp
== 1 || cmp
== -1 || cmp
== -3)
7610 gfc_error ("Allocating %s at %L with type-spec requires the same "
7611 "character-length parameter as in the declaration",
7612 sym
->name
, &e
->where
);
7617 /* In the variable definition context checks, gfc_expr_attr is used
7618 on the expression. This is fooled by the array specification
7619 present in e, thus we have to eliminate that one temporarily. */
7620 e2
= remove_last_array_ref (e
);
7623 t
= gfc_check_vardef_context (e2
, true, true, false,
7624 _("ALLOCATE object"));
7626 t
= gfc_check_vardef_context (e2
, false, true, false,
7627 _("ALLOCATE object"));
7632 if (e
->ts
.type
== BT_CLASS
&& CLASS_DATA (e
)->attr
.dimension
7633 && !code
->expr3
&& code
->ext
.alloc
.ts
.type
== BT_DERIVED
)
7635 /* For class arrays, the initialization with SOURCE is done
7636 using _copy and trans_call. It is convenient to exploit that
7637 when the allocated type is different from the declared type but
7638 no SOURCE exists by setting expr3. */
7639 code
->expr3
= gfc_default_initializer (&code
->ext
.alloc
.ts
);
7641 else if (flag_coarray
!= GFC_FCOARRAY_LIB
&& e
->ts
.type
== BT_DERIVED
7642 && e
->ts
.u
.derived
->from_intmod
== INTMOD_ISO_FORTRAN_ENV
7643 && e
->ts
.u
.derived
->intmod_sym_id
== ISOFORTRAN_EVENT_TYPE
)
7645 /* We have to zero initialize the integer variable. */
7646 code
->expr3
= gfc_get_int_expr (gfc_default_integer_kind
, &e
->where
, 0);
7649 if (e
->ts
.type
== BT_CLASS
&& !unlimited
&& !UNLIMITED_POLY (code
->expr3
))
7651 /* Make sure the vtab symbol is present when
7652 the module variables are generated. */
7653 gfc_typespec ts
= e
->ts
;
7655 ts
= code
->expr3
->ts
;
7656 else if (code
->ext
.alloc
.ts
.type
== BT_DERIVED
)
7657 ts
= code
->ext
.alloc
.ts
;
7659 /* Finding the vtab also publishes the type's symbol. Therefore this
7660 statement is necessary. */
7661 gfc_find_derived_vtab (ts
.u
.derived
);
7663 else if (unlimited
&& !UNLIMITED_POLY (code
->expr3
))
7665 /* Again, make sure the vtab symbol is present when
7666 the module variables are generated. */
7667 gfc_typespec
*ts
= NULL
;
7669 ts
= &code
->expr3
->ts
;
7671 ts
= &code
->ext
.alloc
.ts
;
7675 /* Finding the vtab also publishes the type's symbol. Therefore this
7676 statement is necessary. */
7680 if (dimension
== 0 && codimension
== 0)
7683 /* Make sure the last reference node is an array specification. */
7685 if (!ref2
|| ref2
->type
!= REF_ARRAY
|| ref2
->u
.ar
.type
== AR_FULL
7686 || (dimension
&& ref2
->u
.ar
.dimen
== 0))
7691 if (!gfc_notify_std (GFC_STD_F2008
, "Array specification required "
7692 "in ALLOCATE statement at %L", &e
->where
))
7694 if (code
->expr3
->rank
!= 0)
7695 *array_alloc_wo_spec
= true;
7698 gfc_error ("Array specification or array-valued SOURCE= "
7699 "expression required in ALLOCATE statement at %L",
7706 gfc_error ("Array specification required in ALLOCATE statement "
7707 "at %L", &e
->where
);
7712 /* Make sure that the array section reference makes sense in the
7713 context of an ALLOCATE specification. */
7718 for (i
= ar
->dimen
; i
< ar
->dimen
+ ar
->codimen
; i
++)
7719 if (ar
->dimen_type
[i
] == DIMEN_THIS_IMAGE
)
7721 gfc_error ("Coarray specification required in ALLOCATE statement "
7722 "at %L", &e
->where
);
7726 for (i
= 0; i
< ar
->dimen
; i
++)
7728 if (ar
->type
== AR_ELEMENT
|| ar
->type
== AR_FULL
)
7731 switch (ar
->dimen_type
[i
])
7737 if (ar
->start
[i
] != NULL
7738 && ar
->end
[i
] != NULL
7739 && ar
->stride
[i
] == NULL
)
7747 case DIMEN_THIS_IMAGE
:
7748 gfc_error ("Bad array specification in ALLOCATE statement at %L",
7754 for (a
= code
->ext
.alloc
.list
; a
; a
= a
->next
)
7756 sym
= a
->expr
->symtree
->n
.sym
;
7758 /* TODO - check derived type components. */
7759 if (gfc_bt_struct (sym
->ts
.type
) || sym
->ts
.type
== BT_CLASS
)
7762 if ((ar
->start
[i
] != NULL
7763 && gfc_find_sym_in_expr (sym
, ar
->start
[i
]))
7764 || (ar
->end
[i
] != NULL
7765 && gfc_find_sym_in_expr (sym
, ar
->end
[i
])))
7767 gfc_error ("%qs must not appear in the array specification at "
7768 "%L in the same ALLOCATE statement where it is "
7769 "itself allocated", sym
->name
, &ar
->where
);
7775 for (i
= ar
->dimen
; i
< ar
->codimen
+ ar
->dimen
; i
++)
7777 if (ar
->dimen_type
[i
] == DIMEN_ELEMENT
7778 || ar
->dimen_type
[i
] == DIMEN_RANGE
)
7780 if (i
== (ar
->dimen
+ ar
->codimen
- 1))
7782 gfc_error ("Expected '*' in coindex specification in ALLOCATE "
7783 "statement at %L", &e
->where
);
7789 if (ar
->dimen_type
[i
] == DIMEN_STAR
&& i
== (ar
->dimen
+ ar
->codimen
- 1)
7790 && ar
->stride
[i
] == NULL
)
7793 gfc_error ("Bad coarray specification in ALLOCATE statement at %L",
7807 resolve_allocate_deallocate (gfc_code
*code
, const char *fcn
)
7809 gfc_expr
*stat
, *errmsg
, *pe
, *qe
;
7810 gfc_alloc
*a
, *p
, *q
;
7813 errmsg
= code
->expr2
;
7815 /* Check the stat variable. */
7818 gfc_check_vardef_context (stat
, false, false, false,
7819 _("STAT variable"));
7821 if ((stat
->ts
.type
!= BT_INTEGER
7822 && !(stat
->ref
&& (stat
->ref
->type
== REF_ARRAY
7823 || stat
->ref
->type
== REF_COMPONENT
)))
7825 gfc_error ("Stat-variable at %L must be a scalar INTEGER "
7826 "variable", &stat
->where
);
7828 for (p
= code
->ext
.alloc
.list
; p
; p
= p
->next
)
7829 if (p
->expr
->symtree
->n
.sym
->name
== stat
->symtree
->n
.sym
->name
)
7831 gfc_ref
*ref1
, *ref2
;
7834 for (ref1
= p
->expr
->ref
, ref2
= stat
->ref
; ref1
&& ref2
;
7835 ref1
= ref1
->next
, ref2
= ref2
->next
)
7837 if (ref1
->type
!= REF_COMPONENT
|| ref2
->type
!= REF_COMPONENT
)
7839 if (ref1
->u
.c
.component
->name
!= ref2
->u
.c
.component
->name
)
7848 gfc_error ("Stat-variable at %L shall not be %sd within "
7849 "the same %s statement", &stat
->where
, fcn
, fcn
);
7855 /* Check the errmsg variable. */
7859 gfc_warning (0, "ERRMSG at %L is useless without a STAT tag",
7862 gfc_check_vardef_context (errmsg
, false, false, false,
7863 _("ERRMSG variable"));
7865 /* F18:R928 alloc-opt is ERRMSG = errmsg-variable
7866 F18:R930 errmsg-variable is scalar-default-char-variable
7867 F18:R906 default-char-variable is variable
7868 F18:C906 default-char-variable shall be default character. */
7869 if ((errmsg
->ts
.type
!= BT_CHARACTER
7871 && (errmsg
->ref
->type
== REF_ARRAY
7872 || errmsg
->ref
->type
== REF_COMPONENT
)))
7874 || errmsg
->ts
.kind
!= gfc_default_character_kind
)
7875 gfc_error ("ERRMSG variable at %L shall be a scalar default CHARACTER "
7876 "variable", &errmsg
->where
);
7878 for (p
= code
->ext
.alloc
.list
; p
; p
= p
->next
)
7879 if (p
->expr
->symtree
->n
.sym
->name
== errmsg
->symtree
->n
.sym
->name
)
7881 gfc_ref
*ref1
, *ref2
;
7884 for (ref1
= p
->expr
->ref
, ref2
= errmsg
->ref
; ref1
&& ref2
;
7885 ref1
= ref1
->next
, ref2
= ref2
->next
)
7887 if (ref1
->type
!= REF_COMPONENT
|| ref2
->type
!= REF_COMPONENT
)
7889 if (ref1
->u
.c
.component
->name
!= ref2
->u
.c
.component
->name
)
7898 gfc_error ("Errmsg-variable at %L shall not be %sd within "
7899 "the same %s statement", &errmsg
->where
, fcn
, fcn
);
7905 /* Check that an allocate-object appears only once in the statement. */
7907 for (p
= code
->ext
.alloc
.list
; p
; p
= p
->next
)
7910 for (q
= p
->next
; q
; q
= q
->next
)
7913 if (pe
->symtree
->n
.sym
->name
== qe
->symtree
->n
.sym
->name
)
7915 /* This is a potential collision. */
7916 gfc_ref
*pr
= pe
->ref
;
7917 gfc_ref
*qr
= qe
->ref
;
7919 /* Follow the references until
7920 a) They start to differ, in which case there is no error;
7921 you can deallocate a%b and a%c in a single statement
7922 b) Both of them stop, which is an error
7923 c) One of them stops, which is also an error. */
7926 if (pr
== NULL
&& qr
== NULL
)
7928 gfc_error ("Allocate-object at %L also appears at %L",
7929 &pe
->where
, &qe
->where
);
7932 else if (pr
!= NULL
&& qr
== NULL
)
7934 gfc_error ("Allocate-object at %L is subobject of"
7935 " object at %L", &pe
->where
, &qe
->where
);
7938 else if (pr
== NULL
&& qr
!= NULL
)
7940 gfc_error ("Allocate-object at %L is subobject of"
7941 " object at %L", &qe
->where
, &pe
->where
);
7944 /* Here, pr != NULL && qr != NULL */
7945 gcc_assert(pr
->type
== qr
->type
);
7946 if (pr
->type
== REF_ARRAY
)
7948 /* Handle cases like allocate(v(3)%x(3), v(2)%x(3)),
7950 gcc_assert (qr
->type
== REF_ARRAY
);
7952 if (pr
->next
&& qr
->next
)
7955 gfc_array_ref
*par
= &(pr
->u
.ar
);
7956 gfc_array_ref
*qar
= &(qr
->u
.ar
);
7958 for (i
=0; i
<par
->dimen
; i
++)
7960 if ((par
->start
[i
] != NULL
7961 || qar
->start
[i
] != NULL
)
7962 && gfc_dep_compare_expr (par
->start
[i
],
7963 qar
->start
[i
]) != 0)
7970 if (pr
->u
.c
.component
->name
!= qr
->u
.c
.component
->name
)
7983 if (strcmp (fcn
, "ALLOCATE") == 0)
7985 bool arr_alloc_wo_spec
= false;
7987 /* Resolving the expr3 in the loop over all objects to allocate would
7988 execute loop invariant code for each loop item. Therefore do it just
7990 if (code
->expr3
&& code
->expr3
->mold
7991 && code
->expr3
->ts
.type
== BT_DERIVED
)
7993 /* Default initialization via MOLD (non-polymorphic). */
7994 gfc_expr
*rhs
= gfc_default_initializer (&code
->expr3
->ts
);
7997 gfc_resolve_expr (rhs
);
7998 gfc_free_expr (code
->expr3
);
8002 for (a
= code
->ext
.alloc
.list
; a
; a
= a
->next
)
8003 resolve_allocate_expr (a
->expr
, code
, &arr_alloc_wo_spec
);
8005 if (arr_alloc_wo_spec
&& code
->expr3
)
8007 /* Mark the allocate to have to take the array specification
8009 code
->ext
.alloc
.arr_spec_from_expr3
= 1;
8014 for (a
= code
->ext
.alloc
.list
; a
; a
= a
->next
)
8015 resolve_deallocate_expr (a
->expr
);
8020 /************ SELECT CASE resolution subroutines ************/
8022 /* Callback function for our mergesort variant. Determines interval
8023 overlaps for CASEs. Return <0 if op1 < op2, 0 for overlap, >0 for
8024 op1 > op2. Assumes we're not dealing with the default case.
8025 We have op1 = (:L), (K:L) or (K:) and op2 = (:N), (M:N) or (M:).
8026 There are nine situations to check. */
8029 compare_cases (const gfc_case
*op1
, const gfc_case
*op2
)
8033 if (op1
->low
== NULL
) /* op1 = (:L) */
8035 /* op2 = (:N), so overlap. */
8037 /* op2 = (M:) or (M:N), L < M */
8038 if (op2
->low
!= NULL
8039 && gfc_compare_expr (op1
->high
, op2
->low
, INTRINSIC_LT
) < 0)
8042 else if (op1
->high
== NULL
) /* op1 = (K:) */
8044 /* op2 = (M:), so overlap. */
8046 /* op2 = (:N) or (M:N), K > N */
8047 if (op2
->high
!= NULL
8048 && gfc_compare_expr (op1
->low
, op2
->high
, INTRINSIC_GT
) > 0)
8051 else /* op1 = (K:L) */
8053 if (op2
->low
== NULL
) /* op2 = (:N), K > N */
8054 retval
= (gfc_compare_expr (op1
->low
, op2
->high
, INTRINSIC_GT
) > 0)
8056 else if (op2
->high
== NULL
) /* op2 = (M:), L < M */
8057 retval
= (gfc_compare_expr (op1
->high
, op2
->low
, INTRINSIC_LT
) < 0)
8059 else /* op2 = (M:N) */
8063 if (gfc_compare_expr (op1
->high
, op2
->low
, INTRINSIC_LT
) < 0)
8066 else if (gfc_compare_expr (op1
->low
, op2
->high
, INTRINSIC_GT
) > 0)
8075 /* Merge-sort a double linked case list, detecting overlap in the
8076 process. LIST is the head of the double linked case list before it
8077 is sorted. Returns the head of the sorted list if we don't see any
8078 overlap, or NULL otherwise. */
8081 check_case_overlap (gfc_case
*list
)
8083 gfc_case
*p
, *q
, *e
, *tail
;
8084 int insize
, nmerges
, psize
, qsize
, cmp
, overlap_seen
;
8086 /* If the passed list was empty, return immediately. */
8093 /* Loop unconditionally. The only exit from this loop is a return
8094 statement, when we've finished sorting the case list. */
8101 /* Count the number of merges we do in this pass. */
8104 /* Loop while there exists a merge to be done. */
8109 /* Count this merge. */
8112 /* Cut the list in two pieces by stepping INSIZE places
8113 forward in the list, starting from P. */
8116 for (i
= 0; i
< insize
; i
++)
8125 /* Now we have two lists. Merge them! */
8126 while (psize
> 0 || (qsize
> 0 && q
!= NULL
))
8128 /* See from which the next case to merge comes from. */
8131 /* P is empty so the next case must come from Q. */
8136 else if (qsize
== 0 || q
== NULL
)
8145 cmp
= compare_cases (p
, q
);
8148 /* The whole case range for P is less than the
8156 /* The whole case range for Q is greater than
8157 the case range for P. */
8164 /* The cases overlap, or they are the same
8165 element in the list. Either way, we must
8166 issue an error and get the next case from P. */
8167 /* FIXME: Sort P and Q by line number. */
8168 gfc_error ("CASE label at %L overlaps with CASE "
8169 "label at %L", &p
->where
, &q
->where
);
8177 /* Add the next element to the merged list. */
8186 /* P has now stepped INSIZE places along, and so has Q. So
8187 they're the same. */
8192 /* If we have done only one merge or none at all, we've
8193 finished sorting the cases. */
8202 /* Otherwise repeat, merging lists twice the size. */
8208 /* Check to see if an expression is suitable for use in a CASE statement.
8209 Makes sure that all case expressions are scalar constants of the same
8210 type. Return false if anything is wrong. */
8213 validate_case_label_expr (gfc_expr
*e
, gfc_expr
*case_expr
)
8215 if (e
== NULL
) return true;
8217 if (e
->ts
.type
!= case_expr
->ts
.type
)
8219 gfc_error ("Expression in CASE statement at %L must be of type %s",
8220 &e
->where
, gfc_basic_typename (case_expr
->ts
.type
));
8224 /* C805 (R808) For a given case-construct, each case-value shall be of
8225 the same type as case-expr. For character type, length differences
8226 are allowed, but the kind type parameters shall be the same. */
8228 if (case_expr
->ts
.type
== BT_CHARACTER
&& e
->ts
.kind
!= case_expr
->ts
.kind
)
8230 gfc_error ("Expression in CASE statement at %L must be of kind %d",
8231 &e
->where
, case_expr
->ts
.kind
);
8235 /* Convert the case value kind to that of case expression kind,
8238 if (e
->ts
.kind
!= case_expr
->ts
.kind
)
8239 gfc_convert_type_warn (e
, &case_expr
->ts
, 2, 0);
8243 gfc_error ("Expression in CASE statement at %L must be scalar",
8252 /* Given a completely parsed select statement, we:
8254 - Validate all expressions and code within the SELECT.
8255 - Make sure that the selection expression is not of the wrong type.
8256 - Make sure that no case ranges overlap.
8257 - Eliminate unreachable cases and unreachable code resulting from
8258 removing case labels.
8260 The standard does allow unreachable cases, e.g. CASE (5:3). But
8261 they are a hassle for code generation, and to prevent that, we just
8262 cut them out here. This is not necessary for overlapping cases
8263 because they are illegal and we never even try to generate code.
8265 We have the additional caveat that a SELECT construct could have
8266 been a computed GOTO in the source code. Fortunately we can fairly
8267 easily work around that here: The case_expr for a "real" SELECT CASE
8268 is in code->expr1, but for a computed GOTO it is in code->expr2. All
8269 we have to do is make sure that the case_expr is a scalar integer
8273 resolve_select (gfc_code
*code
, bool select_type
)
8276 gfc_expr
*case_expr
;
8277 gfc_case
*cp
, *default_case
, *tail
, *head
;
8278 int seen_unreachable
;
8284 if (code
->expr1
== NULL
)
8286 /* This was actually a computed GOTO statement. */
8287 case_expr
= code
->expr2
;
8288 if (case_expr
->ts
.type
!= BT_INTEGER
|| case_expr
->rank
!= 0)
8289 gfc_error ("Selection expression in computed GOTO statement "
8290 "at %L must be a scalar integer expression",
8293 /* Further checking is not necessary because this SELECT was built
8294 by the compiler, so it should always be OK. Just move the
8295 case_expr from expr2 to expr so that we can handle computed
8296 GOTOs as normal SELECTs from here on. */
8297 code
->expr1
= code
->expr2
;
8302 case_expr
= code
->expr1
;
8303 type
= case_expr
->ts
.type
;
8306 if (type
!= BT_LOGICAL
&& type
!= BT_INTEGER
&& type
!= BT_CHARACTER
)
8308 gfc_error ("Argument of SELECT statement at %L cannot be %s",
8309 &case_expr
->where
, gfc_typename (&case_expr
->ts
));
8311 /* Punt. Going on here just produce more garbage error messages. */
8316 if (!select_type
&& case_expr
->rank
!= 0)
8318 gfc_error ("Argument of SELECT statement at %L must be a scalar "
8319 "expression", &case_expr
->where
);
8325 /* Raise a warning if an INTEGER case value exceeds the range of
8326 the case-expr. Later, all expressions will be promoted to the
8327 largest kind of all case-labels. */
8329 if (type
== BT_INTEGER
)
8330 for (body
= code
->block
; body
; body
= body
->block
)
8331 for (cp
= body
->ext
.block
.case_list
; cp
; cp
= cp
->next
)
8334 && gfc_check_integer_range (cp
->low
->value
.integer
,
8335 case_expr
->ts
.kind
) != ARITH_OK
)
8336 gfc_warning (0, "Expression in CASE statement at %L is "
8337 "not in the range of %s", &cp
->low
->where
,
8338 gfc_typename (&case_expr
->ts
));
8341 && cp
->low
!= cp
->high
8342 && gfc_check_integer_range (cp
->high
->value
.integer
,
8343 case_expr
->ts
.kind
) != ARITH_OK
)
8344 gfc_warning (0, "Expression in CASE statement at %L is "
8345 "not in the range of %s", &cp
->high
->where
,
8346 gfc_typename (&case_expr
->ts
));
8349 /* PR 19168 has a long discussion concerning a mismatch of the kinds
8350 of the SELECT CASE expression and its CASE values. Walk the lists
8351 of case values, and if we find a mismatch, promote case_expr to
8352 the appropriate kind. */
8354 if (type
== BT_LOGICAL
|| type
== BT_INTEGER
)
8356 for (body
= code
->block
; body
; body
= body
->block
)
8358 /* Walk the case label list. */
8359 for (cp
= body
->ext
.block
.case_list
; cp
; cp
= cp
->next
)
8361 /* Intercept the DEFAULT case. It does not have a kind. */
8362 if (cp
->low
== NULL
&& cp
->high
== NULL
)
8365 /* Unreachable case ranges are discarded, so ignore. */
8366 if (cp
->low
!= NULL
&& cp
->high
!= NULL
8367 && cp
->low
!= cp
->high
8368 && gfc_compare_expr (cp
->low
, cp
->high
, INTRINSIC_GT
) > 0)
8372 && case_expr
->ts
.kind
!= gfc_kind_max(case_expr
, cp
->low
))
8373 gfc_convert_type_warn (case_expr
, &cp
->low
->ts
, 2, 0);
8375 if (cp
->high
!= NULL
8376 && case_expr
->ts
.kind
!= gfc_kind_max(case_expr
, cp
->high
))
8377 gfc_convert_type_warn (case_expr
, &cp
->high
->ts
, 2, 0);
8382 /* Assume there is no DEFAULT case. */
8383 default_case
= NULL
;
8388 for (body
= code
->block
; body
; body
= body
->block
)
8390 /* Assume the CASE list is OK, and all CASE labels can be matched. */
8392 seen_unreachable
= 0;
8394 /* Walk the case label list, making sure that all case labels
8396 for (cp
= body
->ext
.block
.case_list
; cp
; cp
= cp
->next
)
8398 /* Count the number of cases in the whole construct. */
8401 /* Intercept the DEFAULT case. */
8402 if (cp
->low
== NULL
&& cp
->high
== NULL
)
8404 if (default_case
!= NULL
)
8406 gfc_error ("The DEFAULT CASE at %L cannot be followed "
8407 "by a second DEFAULT CASE at %L",
8408 &default_case
->where
, &cp
->where
);
8419 /* Deal with single value cases and case ranges. Errors are
8420 issued from the validation function. */
8421 if (!validate_case_label_expr (cp
->low
, case_expr
)
8422 || !validate_case_label_expr (cp
->high
, case_expr
))
8428 if (type
== BT_LOGICAL
8429 && ((cp
->low
== NULL
|| cp
->high
== NULL
)
8430 || cp
->low
!= cp
->high
))
8432 gfc_error ("Logical range in CASE statement at %L is not "
8433 "allowed", &cp
->low
->where
);
8438 if (type
== BT_LOGICAL
&& cp
->low
->expr_type
== EXPR_CONSTANT
)
8441 value
= cp
->low
->value
.logical
== 0 ? 2 : 1;
8442 if (value
& seen_logical
)
8444 gfc_error ("Constant logical value in CASE statement "
8445 "is repeated at %L",
8450 seen_logical
|= value
;
8453 if (cp
->low
!= NULL
&& cp
->high
!= NULL
8454 && cp
->low
!= cp
->high
8455 && gfc_compare_expr (cp
->low
, cp
->high
, INTRINSIC_GT
) > 0)
8457 if (warn_surprising
)
8458 gfc_warning (OPT_Wsurprising
,
8459 "Range specification at %L can never be matched",
8462 cp
->unreachable
= 1;
8463 seen_unreachable
= 1;
8467 /* If the case range can be matched, it can also overlap with
8468 other cases. To make sure it does not, we put it in a
8469 double linked list here. We sort that with a merge sort
8470 later on to detect any overlapping cases. */
8474 head
->right
= head
->left
= NULL
;
8479 tail
->right
->left
= tail
;
8486 /* It there was a failure in the previous case label, give up
8487 for this case label list. Continue with the next block. */
8491 /* See if any case labels that are unreachable have been seen.
8492 If so, we eliminate them. This is a bit of a kludge because
8493 the case lists for a single case statement (label) is a
8494 single forward linked lists. */
8495 if (seen_unreachable
)
8497 /* Advance until the first case in the list is reachable. */
8498 while (body
->ext
.block
.case_list
!= NULL
8499 && body
->ext
.block
.case_list
->unreachable
)
8501 gfc_case
*n
= body
->ext
.block
.case_list
;
8502 body
->ext
.block
.case_list
= body
->ext
.block
.case_list
->next
;
8504 gfc_free_case_list (n
);
8507 /* Strip all other unreachable cases. */
8508 if (body
->ext
.block
.case_list
)
8510 for (cp
= body
->ext
.block
.case_list
; cp
&& cp
->next
; cp
= cp
->next
)
8512 if (cp
->next
->unreachable
)
8514 gfc_case
*n
= cp
->next
;
8515 cp
->next
= cp
->next
->next
;
8517 gfc_free_case_list (n
);
8524 /* See if there were overlapping cases. If the check returns NULL,
8525 there was overlap. In that case we don't do anything. If head
8526 is non-NULL, we prepend the DEFAULT case. The sorted list can
8527 then used during code generation for SELECT CASE constructs with
8528 a case expression of a CHARACTER type. */
8531 head
= check_case_overlap (head
);
8533 /* Prepend the default_case if it is there. */
8534 if (head
!= NULL
&& default_case
)
8536 default_case
->left
= NULL
;
8537 default_case
->right
= head
;
8538 head
->left
= default_case
;
8542 /* Eliminate dead blocks that may be the result if we've seen
8543 unreachable case labels for a block. */
8544 for (body
= code
; body
&& body
->block
; body
= body
->block
)
8546 if (body
->block
->ext
.block
.case_list
== NULL
)
8548 /* Cut the unreachable block from the code chain. */
8549 gfc_code
*c
= body
->block
;
8550 body
->block
= c
->block
;
8552 /* Kill the dead block, but not the blocks below it. */
8554 gfc_free_statements (c
);
8558 /* More than two cases is legal but insane for logical selects.
8559 Issue a warning for it. */
8560 if (warn_surprising
&& type
== BT_LOGICAL
&& ncases
> 2)
8561 gfc_warning (OPT_Wsurprising
,
8562 "Logical SELECT CASE block at %L has more that two cases",
8567 /* Check if a derived type is extensible. */
8570 gfc_type_is_extensible (gfc_symbol
*sym
)
8572 return !(sym
->attr
.is_bind_c
|| sym
->attr
.sequence
8573 || (sym
->attr
.is_class
8574 && sym
->components
->ts
.u
.derived
->attr
.unlimited_polymorphic
));
8579 resolve_types (gfc_namespace
*ns
);
8581 /* Resolve an associate-name: Resolve target and ensure the type-spec is
8582 correct as well as possibly the array-spec. */
8585 resolve_assoc_var (gfc_symbol
* sym
, bool resolve_target
)
8589 gcc_assert (sym
->assoc
);
8590 gcc_assert (sym
->attr
.flavor
== FL_VARIABLE
);
8592 /* If this is for SELECT TYPE, the target may not yet be set. In that
8593 case, return. Resolution will be called later manually again when
8595 target
= sym
->assoc
->target
;
8598 gcc_assert (!sym
->assoc
->dangling
);
8600 if (resolve_target
&& !gfc_resolve_expr (target
))
8603 /* For variable targets, we get some attributes from the target. */
8604 if (target
->expr_type
== EXPR_VARIABLE
)
8608 gcc_assert (target
->symtree
);
8609 tsym
= target
->symtree
->n
.sym
;
8611 sym
->attr
.asynchronous
= tsym
->attr
.asynchronous
;
8612 sym
->attr
.volatile_
= tsym
->attr
.volatile_
;
8614 sym
->attr
.target
= tsym
->attr
.target
8615 || gfc_expr_attr (target
).pointer
;
8616 if (is_subref_array (target
))
8617 sym
->attr
.subref_array_pointer
= 1;
8620 if (target
->expr_type
== EXPR_NULL
)
8622 gfc_error ("Selector at %L cannot be NULL()", &target
->where
);
8625 else if (target
->ts
.type
== BT_UNKNOWN
)
8627 gfc_error ("Selector at %L has no type", &target
->where
);
8631 /* Get type if this was not already set. Note that it can be
8632 some other type than the target in case this is a SELECT TYPE
8633 selector! So we must not update when the type is already there. */
8634 if (sym
->ts
.type
== BT_UNKNOWN
)
8635 sym
->ts
= target
->ts
;
8637 gcc_assert (sym
->ts
.type
!= BT_UNKNOWN
);
8639 /* See if this is a valid association-to-variable. */
8640 sym
->assoc
->variable
= (target
->expr_type
== EXPR_VARIABLE
8641 && !gfc_has_vector_subscript (target
));
8643 /* Finally resolve if this is an array or not. */
8644 if (sym
->attr
.dimension
&& target
->rank
== 0)
8646 /* primary.c makes the assumption that a reference to an associate
8647 name followed by a left parenthesis is an array reference. */
8648 if (sym
->ts
.type
!= BT_CHARACTER
)
8649 gfc_error ("Associate-name %qs at %L is used as array",
8650 sym
->name
, &sym
->declared_at
);
8651 sym
->attr
.dimension
= 0;
8656 /* We cannot deal with class selectors that need temporaries. */
8657 if (target
->ts
.type
== BT_CLASS
8658 && gfc_ref_needs_temporary_p (target
->ref
))
8660 gfc_error ("CLASS selector at %L needs a temporary which is not "
8661 "yet implemented", &target
->where
);
8665 if (target
->ts
.type
== BT_CLASS
)
8666 gfc_fix_class_refs (target
);
8668 if (target
->rank
!= 0)
8671 /* The rank may be incorrectly guessed at parsing, therefore make sure
8672 it is corrected now. */
8673 if (sym
->ts
.type
!= BT_CLASS
&& (!sym
->as
|| sym
->assoc
->rankguessed
))
8676 sym
->as
= gfc_get_array_spec ();
8678 as
->rank
= target
->rank
;
8679 as
->type
= AS_DEFERRED
;
8680 as
->corank
= gfc_get_corank (target
);
8681 sym
->attr
.dimension
= 1;
8682 if (as
->corank
!= 0)
8683 sym
->attr
.codimension
= 1;
8688 /* target's rank is 0, but the type of the sym is still array valued,
8689 which has to be corrected. */
8690 if (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
)->as
)
8693 symbol_attribute attr
;
8694 /* The associated variable's type is still the array type
8695 correct this now. */
8696 gfc_typespec
*ts
= &target
->ts
;
8699 for (ref
= target
->ref
; ref
!= NULL
; ref
= ref
->next
)
8704 ts
= &ref
->u
.c
.component
->ts
;
8707 if (ts
->type
== BT_CLASS
)
8708 ts
= &ts
->u
.derived
->components
->ts
;
8714 /* Create a scalar instance of the current class type. Because the
8715 rank of a class array goes into its name, the type has to be
8716 rebuild. The alternative of (re-)setting just the attributes
8717 and as in the current type, destroys the type also in other
8721 sym
->ts
.type
= BT_CLASS
;
8722 attr
= CLASS_DATA (sym
)->attr
;
8724 attr
.associate_var
= 1;
8725 attr
.dimension
= attr
.codimension
= 0;
8726 attr
.class_pointer
= 1;
8727 if (!gfc_build_class_symbol (&sym
->ts
, &attr
, &as
))
8729 /* Make sure the _vptr is set. */
8730 c
= gfc_find_component (sym
->ts
.u
.derived
, "_vptr", true, true, NULL
);
8731 if (c
->ts
.u
.derived
== NULL
)
8732 c
->ts
.u
.derived
= gfc_find_derived_vtab (sym
->ts
.u
.derived
);
8733 CLASS_DATA (sym
)->attr
.pointer
= 1;
8734 CLASS_DATA (sym
)->attr
.class_pointer
= 1;
8735 gfc_set_sym_referenced (sym
->ts
.u
.derived
);
8736 gfc_commit_symbol (sym
->ts
.u
.derived
);
8737 /* _vptr now has the _vtab in it, change it to the _vtype. */
8738 if (c
->ts
.u
.derived
->attr
.vtab
)
8739 c
->ts
.u
.derived
= c
->ts
.u
.derived
->ts
.u
.derived
;
8740 c
->ts
.u
.derived
->ns
->types_resolved
= 0;
8741 resolve_types (c
->ts
.u
.derived
->ns
);
8745 /* Mark this as an associate variable. */
8746 sym
->attr
.associate_var
= 1;
8748 /* Fix up the type-spec for CHARACTER types. */
8749 if (sym
->ts
.type
== BT_CHARACTER
&& !sym
->attr
.select_type_temporary
)
8752 sym
->ts
.u
.cl
= target
->ts
.u
.cl
;
8754 if (sym
->ts
.deferred
&& target
->expr_type
== EXPR_VARIABLE
8755 && target
->symtree
->n
.sym
->attr
.dummy
8756 && sym
->ts
.u
.cl
== target
->ts
.u
.cl
)
8758 sym
->ts
.u
.cl
= gfc_new_charlen (sym
->ns
, NULL
);
8759 sym
->ts
.deferred
= 1;
8762 if (!sym
->ts
.u
.cl
->length
8763 && !sym
->ts
.deferred
8764 && target
->expr_type
== EXPR_CONSTANT
)
8766 sym
->ts
.u
.cl
->length
=
8767 gfc_get_int_expr (gfc_charlen_int_kind
, NULL
,
8768 target
->value
.character
.length
);
8770 else if ((!sym
->ts
.u
.cl
->length
8771 || sym
->ts
.u
.cl
->length
->expr_type
!= EXPR_CONSTANT
)
8772 && target
->expr_type
!= EXPR_VARIABLE
)
8774 sym
->ts
.u
.cl
= gfc_new_charlen (sym
->ns
, NULL
);
8775 sym
->ts
.deferred
= 1;
8777 /* This is reset in trans-stmt.c after the assignment
8778 of the target expression to the associate name. */
8779 sym
->attr
.allocatable
= 1;
8783 /* If the target is a good class object, so is the associate variable. */
8784 if (sym
->ts
.type
== BT_CLASS
&& gfc_expr_attr (target
).class_ok
)
8785 sym
->attr
.class_ok
= 1;
8789 /* Ensure that SELECT TYPE expressions have the correct rank and a full
8790 array reference, where necessary. The symbols are artificial and so
8791 the dimension attribute and arrayspec can also be set. In addition,
8792 sometimes the expr1 arrives as BT_DERIVED, when the symbol is BT_CLASS.
8793 This is corrected here as well.*/
8796 fixup_array_ref (gfc_expr
**expr1
, gfc_expr
*expr2
,
8797 int rank
, gfc_ref
*ref
)
8799 gfc_ref
*nref
= (*expr1
)->ref
;
8800 gfc_symbol
*sym1
= (*expr1
)->symtree
->n
.sym
;
8801 gfc_symbol
*sym2
= expr2
? expr2
->symtree
->n
.sym
: NULL
;
8802 (*expr1
)->rank
= rank
;
8803 if (sym1
->ts
.type
== BT_CLASS
)
8805 if ((*expr1
)->ts
.type
!= BT_CLASS
)
8806 (*expr1
)->ts
= sym1
->ts
;
8808 CLASS_DATA (sym1
)->attr
.dimension
= 1;
8809 if (CLASS_DATA (sym1
)->as
== NULL
&& sym2
)
8810 CLASS_DATA (sym1
)->as
8811 = gfc_copy_array_spec (CLASS_DATA (sym2
)->as
);
8815 sym1
->attr
.dimension
= 1;
8816 if (sym1
->as
== NULL
&& sym2
)
8817 sym1
->as
= gfc_copy_array_spec (sym2
->as
);
8820 for (; nref
; nref
= nref
->next
)
8821 if (nref
->next
== NULL
)
8824 if (ref
&& nref
&& nref
->type
!= REF_ARRAY
)
8825 nref
->next
= gfc_copy_ref (ref
);
8826 else if (ref
&& !nref
)
8827 (*expr1
)->ref
= gfc_copy_ref (ref
);
8832 build_loc_call (gfc_expr
*sym_expr
)
8835 loc_call
= gfc_get_expr ();
8836 loc_call
->expr_type
= EXPR_FUNCTION
;
8837 gfc_get_sym_tree ("_loc", gfc_current_ns
, &loc_call
->symtree
, false);
8838 loc_call
->symtree
->n
.sym
->attr
.flavor
= FL_PROCEDURE
;
8839 loc_call
->symtree
->n
.sym
->attr
.intrinsic
= 1;
8840 loc_call
->symtree
->n
.sym
->result
= loc_call
->symtree
->n
.sym
;
8841 gfc_commit_symbol (loc_call
->symtree
->n
.sym
);
8842 loc_call
->ts
.type
= BT_INTEGER
;
8843 loc_call
->ts
.kind
= gfc_index_integer_kind
;
8844 loc_call
->value
.function
.isym
= gfc_intrinsic_function_by_id (GFC_ISYM_LOC
);
8845 loc_call
->value
.function
.actual
= gfc_get_actual_arglist ();
8846 loc_call
->value
.function
.actual
->expr
= sym_expr
;
8847 loc_call
->where
= sym_expr
->where
;
8851 /* Resolve a SELECT TYPE statement. */
8854 resolve_select_type (gfc_code
*code
, gfc_namespace
*old_ns
)
8856 gfc_symbol
*selector_type
;
8857 gfc_code
*body
, *new_st
, *if_st
, *tail
;
8858 gfc_code
*class_is
= NULL
, *default_case
= NULL
;
8861 char name
[GFC_MAX_SYMBOL_LEN
];
8865 gfc_ref
* ref
= NULL
;
8866 gfc_expr
*selector_expr
= NULL
;
8868 ns
= code
->ext
.block
.ns
;
8871 /* Check for F03:C813. */
8872 if (code
->expr1
->ts
.type
!= BT_CLASS
8873 && !(code
->expr2
&& code
->expr2
->ts
.type
== BT_CLASS
))
8875 gfc_error ("Selector shall be polymorphic in SELECT TYPE statement "
8876 "at %L", &code
->loc
);
8880 if (!code
->expr1
->symtree
->n
.sym
->attr
.class_ok
)
8885 if (code
->expr1
->symtree
->n
.sym
->attr
.untyped
)
8886 code
->expr1
->symtree
->n
.sym
->ts
= code
->expr2
->ts
;
8887 selector_type
= CLASS_DATA (code
->expr2
)->ts
.u
.derived
;
8889 if (code
->expr2
->rank
&& CLASS_DATA (code
->expr1
)->as
)
8890 CLASS_DATA (code
->expr1
)->as
->rank
= code
->expr2
->rank
;
8892 /* F2008: C803 The selector expression must not be coindexed. */
8893 if (gfc_is_coindexed (code
->expr2
))
8895 gfc_error ("Selector at %L must not be coindexed",
8896 &code
->expr2
->where
);
8903 selector_type
= CLASS_DATA (code
->expr1
)->ts
.u
.derived
;
8905 if (gfc_is_coindexed (code
->expr1
))
8907 gfc_error ("Selector at %L must not be coindexed",
8908 &code
->expr1
->where
);
8913 /* Loop over TYPE IS / CLASS IS cases. */
8914 for (body
= code
->block
; body
; body
= body
->block
)
8916 c
= body
->ext
.block
.case_list
;
8920 /* Check for repeated cases. */
8921 for (tail
= code
->block
; tail
; tail
= tail
->block
)
8923 gfc_case
*d
= tail
->ext
.block
.case_list
;
8927 if (c
->ts
.type
== d
->ts
.type
8928 && ((c
->ts
.type
== BT_DERIVED
8929 && c
->ts
.u
.derived
&& d
->ts
.u
.derived
8930 && !strcmp (c
->ts
.u
.derived
->name
,
8931 d
->ts
.u
.derived
->name
))
8932 || c
->ts
.type
== BT_UNKNOWN
8933 || (!(c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
8934 && c
->ts
.kind
== d
->ts
.kind
)))
8936 gfc_error ("TYPE IS at %L overlaps with TYPE IS at %L",
8937 &c
->where
, &d
->where
);
8943 /* Check F03:C815. */
8944 if ((c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
8945 && !selector_type
->attr
.unlimited_polymorphic
8946 && !gfc_type_is_extensible (c
->ts
.u
.derived
))
8948 gfc_error ("Derived type %qs at %L must be extensible",
8949 c
->ts
.u
.derived
->name
, &c
->where
);
8954 /* Check F03:C816. */
8955 if (c
->ts
.type
!= BT_UNKNOWN
&& !selector_type
->attr
.unlimited_polymorphic
8956 && ((c
->ts
.type
!= BT_DERIVED
&& c
->ts
.type
!= BT_CLASS
)
8957 || !gfc_type_is_extension_of (selector_type
, c
->ts
.u
.derived
)))
8959 if (c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
8960 gfc_error ("Derived type %qs at %L must be an extension of %qs",
8961 c
->ts
.u
.derived
->name
, &c
->where
, selector_type
->name
);
8963 gfc_error ("Unexpected intrinsic type %qs at %L",
8964 gfc_basic_typename (c
->ts
.type
), &c
->where
);
8969 /* Check F03:C814. */
8970 if (c
->ts
.type
== BT_CHARACTER
8971 && (c
->ts
.u
.cl
->length
!= NULL
|| c
->ts
.deferred
))
8973 gfc_error ("The type-spec at %L shall specify that each length "
8974 "type parameter is assumed", &c
->where
);
8979 /* Intercept the DEFAULT case. */
8980 if (c
->ts
.type
== BT_UNKNOWN
)
8982 /* Check F03:C818. */
8985 gfc_error ("The DEFAULT CASE at %L cannot be followed "
8986 "by a second DEFAULT CASE at %L",
8987 &default_case
->ext
.block
.case_list
->where
, &c
->where
);
8992 default_case
= body
;
8999 /* Transform SELECT TYPE statement to BLOCK and associate selector to
9000 target if present. If there are any EXIT statements referring to the
9001 SELECT TYPE construct, this is no problem because the gfc_code
9002 reference stays the same and EXIT is equally possible from the BLOCK
9003 it is changed to. */
9004 code
->op
= EXEC_BLOCK
;
9007 gfc_association_list
* assoc
;
9009 assoc
= gfc_get_association_list ();
9010 assoc
->st
= code
->expr1
->symtree
;
9011 assoc
->target
= gfc_copy_expr (code
->expr2
);
9012 assoc
->target
->where
= code
->expr2
->where
;
9013 /* assoc->variable will be set by resolve_assoc_var. */
9015 code
->ext
.block
.assoc
= assoc
;
9016 code
->expr1
->symtree
->n
.sym
->assoc
= assoc
;
9018 resolve_assoc_var (code
->expr1
->symtree
->n
.sym
, false);
9021 code
->ext
.block
.assoc
= NULL
;
9023 /* Ensure that the selector rank and arrayspec are available to
9024 correct expressions in which they might be missing. */
9025 if (code
->expr2
&& code
->expr2
->rank
)
9027 rank
= code
->expr2
->rank
;
9028 for (ref
= code
->expr2
->ref
; ref
; ref
= ref
->next
)
9029 if (ref
->next
== NULL
)
9031 if (ref
&& ref
->type
== REF_ARRAY
)
9032 ref
= gfc_copy_ref (ref
);
9034 /* Fixup expr1 if necessary. */
9036 fixup_array_ref (&code
->expr1
, code
->expr2
, rank
, ref
);
9038 else if (code
->expr1
->rank
)
9040 rank
= code
->expr1
->rank
;
9041 for (ref
= code
->expr1
->ref
; ref
; ref
= ref
->next
)
9042 if (ref
->next
== NULL
)
9044 if (ref
&& ref
->type
== REF_ARRAY
)
9045 ref
= gfc_copy_ref (ref
);
9048 /* Add EXEC_SELECT to switch on type. */
9049 new_st
= gfc_get_code (code
->op
);
9050 new_st
->expr1
= code
->expr1
;
9051 new_st
->expr2
= code
->expr2
;
9052 new_st
->block
= code
->block
;
9053 code
->expr1
= code
->expr2
= NULL
;
9058 ns
->code
->next
= new_st
;
9060 code
->op
= EXEC_SELECT_TYPE
;
9062 /* Use the intrinsic LOC function to generate an integer expression
9063 for the vtable of the selector. Note that the rank of the selector
9064 expression has to be set to zero. */
9065 gfc_add_vptr_component (code
->expr1
);
9066 code
->expr1
->rank
= 0;
9067 code
->expr1
= build_loc_call (code
->expr1
);
9068 selector_expr
= code
->expr1
->value
.function
.actual
->expr
;
9070 /* Loop over TYPE IS / CLASS IS cases. */
9071 for (body
= code
->block
; body
; body
= body
->block
)
9075 c
= body
->ext
.block
.case_list
;
9077 /* Generate an index integer expression for address of the
9078 TYPE/CLASS vtable and store it in c->low. The hash expression
9079 is stored in c->high and is used to resolve intrinsic cases. */
9080 if (c
->ts
.type
!= BT_UNKNOWN
)
9082 if (c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
9084 vtab
= gfc_find_derived_vtab (c
->ts
.u
.derived
);
9086 c
->high
= gfc_get_int_expr (gfc_integer_4_kind
, NULL
,
9087 c
->ts
.u
.derived
->hash_value
);
9091 vtab
= gfc_find_vtab (&c
->ts
);
9092 gcc_assert (vtab
&& CLASS_DATA (vtab
)->initializer
);
9093 e
= CLASS_DATA (vtab
)->initializer
;
9094 c
->high
= gfc_copy_expr (e
);
9095 if (c
->high
->ts
.kind
!= gfc_integer_4_kind
)
9098 ts
.kind
= gfc_integer_4_kind
;
9099 ts
.type
= BT_INTEGER
;
9100 gfc_convert_type_warn (c
->high
, &ts
, 2, 0);
9104 e
= gfc_lval_expr_from_sym (vtab
);
9105 c
->low
= build_loc_call (e
);
9110 /* Associate temporary to selector. This should only be done
9111 when this case is actually true, so build a new ASSOCIATE
9112 that does precisely this here (instead of using the
9115 if (c
->ts
.type
== BT_CLASS
)
9116 sprintf (name
, "__tmp_class_%s", c
->ts
.u
.derived
->name
);
9117 else if (c
->ts
.type
== BT_DERIVED
)
9118 sprintf (name
, "__tmp_type_%s", c
->ts
.u
.derived
->name
);
9119 else if (c
->ts
.type
== BT_CHARACTER
)
9121 HOST_WIDE_INT charlen
= 0;
9122 if (c
->ts
.u
.cl
&& c
->ts
.u
.cl
->length
9123 && c
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
)
9124 charlen
= gfc_mpz_get_hwi (c
->ts
.u
.cl
->length
->value
.integer
);
9125 snprintf (name
, sizeof (name
),
9126 "__tmp_%s_" HOST_WIDE_INT_PRINT_DEC
"_%d",
9127 gfc_basic_typename (c
->ts
.type
), charlen
, c
->ts
.kind
);
9130 sprintf (name
, "__tmp_%s_%d", gfc_basic_typename (c
->ts
.type
),
9133 st
= gfc_find_symtree (ns
->sym_root
, name
);
9134 gcc_assert (st
->n
.sym
->assoc
);
9135 st
->n
.sym
->assoc
->target
= gfc_get_variable_expr (selector_expr
->symtree
);
9136 st
->n
.sym
->assoc
->target
->where
= selector_expr
->where
;
9137 if (c
->ts
.type
!= BT_CLASS
&& c
->ts
.type
!= BT_UNKNOWN
)
9139 gfc_add_data_component (st
->n
.sym
->assoc
->target
);
9140 /* Fixup the target expression if necessary. */
9142 fixup_array_ref (&st
->n
.sym
->assoc
->target
, NULL
, rank
, ref
);
9145 new_st
= gfc_get_code (EXEC_BLOCK
);
9146 new_st
->ext
.block
.ns
= gfc_build_block_ns (ns
);
9147 new_st
->ext
.block
.ns
->code
= body
->next
;
9148 body
->next
= new_st
;
9150 /* Chain in the new list only if it is marked as dangling. Otherwise
9151 there is a CASE label overlap and this is already used. Just ignore,
9152 the error is diagnosed elsewhere. */
9153 if (st
->n
.sym
->assoc
->dangling
)
9155 new_st
->ext
.block
.assoc
= st
->n
.sym
->assoc
;
9156 st
->n
.sym
->assoc
->dangling
= 0;
9159 resolve_assoc_var (st
->n
.sym
, false);
9162 /* Take out CLASS IS cases for separate treatment. */
9164 while (body
&& body
->block
)
9166 if (body
->block
->ext
.block
.case_list
->ts
.type
== BT_CLASS
)
9168 /* Add to class_is list. */
9169 if (class_is
== NULL
)
9171 class_is
= body
->block
;
9176 for (tail
= class_is
; tail
->block
; tail
= tail
->block
) ;
9177 tail
->block
= body
->block
;
9180 /* Remove from EXEC_SELECT list. */
9181 body
->block
= body
->block
->block
;
9194 /* Add a default case to hold the CLASS IS cases. */
9195 for (tail
= code
; tail
->block
; tail
= tail
->block
) ;
9196 tail
->block
= gfc_get_code (EXEC_SELECT_TYPE
);
9198 tail
->ext
.block
.case_list
= gfc_get_case ();
9199 tail
->ext
.block
.case_list
->ts
.type
= BT_UNKNOWN
;
9201 default_case
= tail
;
9204 /* More than one CLASS IS block? */
9205 if (class_is
->block
)
9209 /* Sort CLASS IS blocks by extension level. */
9213 for (c1
= &class_is
; (*c1
) && (*c1
)->block
; c1
= &((*c1
)->block
))
9216 /* F03:C817 (check for doubles). */
9217 if ((*c1
)->ext
.block
.case_list
->ts
.u
.derived
->hash_value
9218 == c2
->ext
.block
.case_list
->ts
.u
.derived
->hash_value
)
9220 gfc_error ("Double CLASS IS block in SELECT TYPE "
9222 &c2
->ext
.block
.case_list
->where
);
9225 if ((*c1
)->ext
.block
.case_list
->ts
.u
.derived
->attr
.extension
9226 < c2
->ext
.block
.case_list
->ts
.u
.derived
->attr
.extension
)
9229 (*c1
)->block
= c2
->block
;
9239 /* Generate IF chain. */
9240 if_st
= gfc_get_code (EXEC_IF
);
9242 for (body
= class_is
; body
; body
= body
->block
)
9244 new_st
->block
= gfc_get_code (EXEC_IF
);
9245 new_st
= new_st
->block
;
9246 /* Set up IF condition: Call _gfortran_is_extension_of. */
9247 new_st
->expr1
= gfc_get_expr ();
9248 new_st
->expr1
->expr_type
= EXPR_FUNCTION
;
9249 new_st
->expr1
->ts
.type
= BT_LOGICAL
;
9250 new_st
->expr1
->ts
.kind
= 4;
9251 new_st
->expr1
->value
.function
.name
= gfc_get_string (PREFIX ("is_extension_of"));
9252 new_st
->expr1
->value
.function
.isym
= XCNEW (gfc_intrinsic_sym
);
9253 new_st
->expr1
->value
.function
.isym
->id
= GFC_ISYM_EXTENDS_TYPE_OF
;
9254 /* Set up arguments. */
9255 new_st
->expr1
->value
.function
.actual
= gfc_get_actual_arglist ();
9256 new_st
->expr1
->value
.function
.actual
->expr
= gfc_get_variable_expr (selector_expr
->symtree
);
9257 new_st
->expr1
->value
.function
.actual
->expr
->where
= code
->loc
;
9258 new_st
->expr1
->where
= code
->loc
;
9259 gfc_add_vptr_component (new_st
->expr1
->value
.function
.actual
->expr
);
9260 vtab
= gfc_find_derived_vtab (body
->ext
.block
.case_list
->ts
.u
.derived
);
9261 st
= gfc_find_symtree (vtab
->ns
->sym_root
, vtab
->name
);
9262 new_st
->expr1
->value
.function
.actual
->next
= gfc_get_actual_arglist ();
9263 new_st
->expr1
->value
.function
.actual
->next
->expr
= gfc_get_variable_expr (st
);
9264 new_st
->expr1
->value
.function
.actual
->next
->expr
->where
= code
->loc
;
9265 new_st
->next
= body
->next
;
9267 if (default_case
->next
)
9269 new_st
->block
= gfc_get_code (EXEC_IF
);
9270 new_st
= new_st
->block
;
9271 new_st
->next
= default_case
->next
;
9274 /* Replace CLASS DEFAULT code by the IF chain. */
9275 default_case
->next
= if_st
;
9278 /* Resolve the internal code. This can not be done earlier because
9279 it requires that the sym->assoc of selectors is set already. */
9280 gfc_current_ns
= ns
;
9281 gfc_resolve_blocks (code
->block
, gfc_current_ns
);
9282 gfc_current_ns
= old_ns
;
9289 /* Resolve a transfer statement. This is making sure that:
9290 -- a derived type being transferred has only non-pointer components
9291 -- a derived type being transferred doesn't have private components, unless
9292 it's being transferred from the module where the type was defined
9293 -- we're not trying to transfer a whole assumed size array. */
9296 resolve_transfer (gfc_code
*code
)
9298 gfc_symbol
*sym
, *derived
;
9302 bool formatted
= false;
9303 gfc_dt
*dt
= code
->ext
.dt
;
9304 gfc_symbol
*dtio_sub
= NULL
;
9308 while (exp
!= NULL
&& exp
->expr_type
== EXPR_OP
9309 && exp
->value
.op
.op
== INTRINSIC_PARENTHESES
)
9310 exp
= exp
->value
.op
.op1
;
9312 if (exp
&& exp
->expr_type
== EXPR_NULL
9315 gfc_error ("Invalid context for NULL () intrinsic at %L",
9320 if (exp
== NULL
|| (exp
->expr_type
!= EXPR_VARIABLE
9321 && exp
->expr_type
!= EXPR_FUNCTION
9322 && exp
->expr_type
!= EXPR_STRUCTURE
))
9325 /* If we are reading, the variable will be changed. Note that
9326 code->ext.dt may be NULL if the TRANSFER is related to
9327 an INQUIRE statement -- but in this case, we are not reading, either. */
9328 if (dt
&& dt
->dt_io_kind
->value
.iokind
== M_READ
9329 && !gfc_check_vardef_context (exp
, false, false, false,
9333 const gfc_typespec
*ts
= exp
->expr_type
== EXPR_STRUCTURE
9334 || exp
->expr_type
== EXPR_FUNCTION
9335 ? &exp
->ts
: &exp
->symtree
->n
.sym
->ts
;
9337 /* Go to actual component transferred. */
9338 for (ref
= exp
->ref
; ref
; ref
= ref
->next
)
9339 if (ref
->type
== REF_COMPONENT
)
9340 ts
= &ref
->u
.c
.component
->ts
;
9342 if (dt
&& dt
->dt_io_kind
->value
.iokind
!= M_INQUIRE
9343 && (ts
->type
== BT_DERIVED
|| ts
->type
== BT_CLASS
))
9345 if (ts
->type
== BT_DERIVED
|| ts
->type
== BT_CLASS
)
9346 derived
= ts
->u
.derived
;
9348 derived
= ts
->u
.derived
->components
->ts
.u
.derived
;
9350 /* Determine when to use the formatted DTIO procedure. */
9351 if (dt
&& (dt
->format_expr
|| dt
->format_label
))
9354 write
= dt
->dt_io_kind
->value
.iokind
== M_WRITE
9355 || dt
->dt_io_kind
->value
.iokind
== M_PRINT
;
9356 dtio_sub
= gfc_find_specific_dtio_proc (derived
, write
, formatted
);
9358 if (dtio_sub
!= NULL
&& exp
->expr_type
== EXPR_VARIABLE
)
9361 sym
= exp
->symtree
->n
.sym
->ns
->proc_name
;
9362 /* Check to see if this is a nested DTIO call, with the
9363 dummy as the io-list object. */
9364 if (sym
&& sym
== dtio_sub
&& sym
->formal
9365 && sym
->formal
->sym
== exp
->symtree
->n
.sym
9366 && exp
->ref
== NULL
)
9368 if (!sym
->attr
.recursive
)
9370 gfc_error ("DTIO %s procedure at %L must be recursive",
9371 sym
->name
, &sym
->declared_at
);
9378 if (ts
->type
== BT_CLASS
&& dtio_sub
== NULL
)
9380 gfc_error ("Data transfer element at %L cannot be polymorphic unless "
9381 "it is processed by a defined input/output procedure",
9386 if (ts
->type
== BT_DERIVED
)
9388 /* Check that transferred derived type doesn't contain POINTER
9389 components unless it is processed by a defined input/output
9391 if (ts
->u
.derived
->attr
.pointer_comp
&& dtio_sub
== NULL
)
9393 gfc_error ("Data transfer element at %L cannot have POINTER "
9394 "components unless it is processed by a defined "
9395 "input/output procedure", &code
->loc
);
9400 if (ts
->u
.derived
->attr
.proc_pointer_comp
)
9402 gfc_error ("Data transfer element at %L cannot have "
9403 "procedure pointer components", &code
->loc
);
9407 if (ts
->u
.derived
->attr
.alloc_comp
&& dtio_sub
== NULL
)
9409 gfc_error ("Data transfer element at %L cannot have ALLOCATABLE "
9410 "components unless it is processed by a defined "
9411 "input/output procedure", &code
->loc
);
9415 /* C_PTR and C_FUNPTR have private components which means they can not
9416 be printed. However, if -std=gnu and not -pedantic, allow
9417 the component to be printed to help debugging. */
9418 if (ts
->u
.derived
->ts
.f90_type
== BT_VOID
)
9420 if (!gfc_notify_std (GFC_STD_GNU
, "Data transfer element at %L "
9421 "cannot have PRIVATE components", &code
->loc
))
9424 else if (derived_inaccessible (ts
->u
.derived
) && dtio_sub
== NULL
)
9426 gfc_error ("Data transfer element at %L cannot have "
9427 "PRIVATE components unless it is processed by "
9428 "a defined input/output procedure", &code
->loc
);
9433 if (exp
->expr_type
== EXPR_STRUCTURE
)
9436 sym
= exp
->symtree
->n
.sym
;
9438 if (sym
->as
!= NULL
&& sym
->as
->type
== AS_ASSUMED_SIZE
&& exp
->ref
9439 && exp
->ref
->type
== REF_ARRAY
&& exp
->ref
->u
.ar
.type
== AR_FULL
)
9441 gfc_error ("Data transfer element at %L cannot be a full reference to "
9442 "an assumed-size array", &code
->loc
);
9446 if (async_io_dt
&& exp
->expr_type
== EXPR_VARIABLE
)
9447 exp
->symtree
->n
.sym
->attr
.asynchronous
= 1;
9451 /*********** Toplevel code resolution subroutines ***********/
9453 /* Find the set of labels that are reachable from this block. We also
9454 record the last statement in each block. */
9457 find_reachable_labels (gfc_code
*block
)
9464 cs_base
->reachable_labels
= bitmap_alloc (&labels_obstack
);
9466 /* Collect labels in this block. We don't keep those corresponding
9467 to END {IF|SELECT}, these are checked in resolve_branch by going
9468 up through the code_stack. */
9469 for (c
= block
; c
; c
= c
->next
)
9471 if (c
->here
&& c
->op
!= EXEC_END_NESTED_BLOCK
)
9472 bitmap_set_bit (cs_base
->reachable_labels
, c
->here
->value
);
9475 /* Merge with labels from parent block. */
9478 gcc_assert (cs_base
->prev
->reachable_labels
);
9479 bitmap_ior_into (cs_base
->reachable_labels
,
9480 cs_base
->prev
->reachable_labels
);
9486 resolve_lock_unlock_event (gfc_code
*code
)
9488 if (code
->expr1
->expr_type
== EXPR_FUNCTION
9489 && code
->expr1
->value
.function
.isym
9490 && code
->expr1
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
)
9491 remove_caf_get_intrinsic (code
->expr1
);
9493 if ((code
->op
== EXEC_LOCK
|| code
->op
== EXEC_UNLOCK
)
9494 && (code
->expr1
->ts
.type
!= BT_DERIVED
9495 || code
->expr1
->expr_type
!= EXPR_VARIABLE
9496 || code
->expr1
->ts
.u
.derived
->from_intmod
!= INTMOD_ISO_FORTRAN_ENV
9497 || code
->expr1
->ts
.u
.derived
->intmod_sym_id
!= ISOFORTRAN_LOCK_TYPE
9498 || code
->expr1
->rank
!= 0
9499 || (!gfc_is_coarray (code
->expr1
) &&
9500 !gfc_is_coindexed (code
->expr1
))))
9501 gfc_error ("Lock variable at %L must be a scalar of type LOCK_TYPE",
9502 &code
->expr1
->where
);
9503 else if ((code
->op
== EXEC_EVENT_POST
|| code
->op
== EXEC_EVENT_WAIT
)
9504 && (code
->expr1
->ts
.type
!= BT_DERIVED
9505 || code
->expr1
->expr_type
!= EXPR_VARIABLE
9506 || code
->expr1
->ts
.u
.derived
->from_intmod
9507 != INTMOD_ISO_FORTRAN_ENV
9508 || code
->expr1
->ts
.u
.derived
->intmod_sym_id
9509 != ISOFORTRAN_EVENT_TYPE
9510 || code
->expr1
->rank
!= 0))
9511 gfc_error ("Event variable at %L must be a scalar of type EVENT_TYPE",
9512 &code
->expr1
->where
);
9513 else if (code
->op
== EXEC_EVENT_POST
&& !gfc_is_coarray (code
->expr1
)
9514 && !gfc_is_coindexed (code
->expr1
))
9515 gfc_error ("Event variable argument at %L must be a coarray or coindexed",
9516 &code
->expr1
->where
);
9517 else if (code
->op
== EXEC_EVENT_WAIT
&& !gfc_is_coarray (code
->expr1
))
9518 gfc_error ("Event variable argument at %L must be a coarray but not "
9519 "coindexed", &code
->expr1
->where
);
9523 && (code
->expr2
->ts
.type
!= BT_INTEGER
|| code
->expr2
->rank
!= 0
9524 || code
->expr2
->expr_type
!= EXPR_VARIABLE
))
9525 gfc_error ("STAT= argument at %L must be a scalar INTEGER variable",
9526 &code
->expr2
->where
);
9529 && !gfc_check_vardef_context (code
->expr2
, false, false, false,
9530 _("STAT variable")))
9535 && (code
->expr3
->ts
.type
!= BT_CHARACTER
|| code
->expr3
->rank
!= 0
9536 || code
->expr3
->expr_type
!= EXPR_VARIABLE
))
9537 gfc_error ("ERRMSG= argument at %L must be a scalar CHARACTER variable",
9538 &code
->expr3
->where
);
9541 && !gfc_check_vardef_context (code
->expr3
, false, false, false,
9542 _("ERRMSG variable")))
9545 /* Check for LOCK the ACQUIRED_LOCK. */
9546 if (code
->op
!= EXEC_EVENT_WAIT
&& code
->expr4
9547 && (code
->expr4
->ts
.type
!= BT_LOGICAL
|| code
->expr4
->rank
!= 0
9548 || code
->expr4
->expr_type
!= EXPR_VARIABLE
))
9549 gfc_error ("ACQUIRED_LOCK= argument at %L must be a scalar LOGICAL "
9550 "variable", &code
->expr4
->where
);
9552 if (code
->op
!= EXEC_EVENT_WAIT
&& code
->expr4
9553 && !gfc_check_vardef_context (code
->expr4
, false, false, false,
9554 _("ACQUIRED_LOCK variable")))
9557 /* Check for EVENT WAIT the UNTIL_COUNT. */
9558 if (code
->op
== EXEC_EVENT_WAIT
&& code
->expr4
)
9560 if (!gfc_resolve_expr (code
->expr4
) || code
->expr4
->ts
.type
!= BT_INTEGER
9561 || code
->expr4
->rank
!= 0)
9562 gfc_error ("UNTIL_COUNT= argument at %L must be a scalar INTEGER "
9563 "expression", &code
->expr4
->where
);
9569 resolve_critical (gfc_code
*code
)
9571 gfc_symtree
*symtree
;
9572 gfc_symbol
*lock_type
;
9573 char name
[GFC_MAX_SYMBOL_LEN
];
9574 static int serial
= 0;
9576 if (flag_coarray
!= GFC_FCOARRAY_LIB
)
9579 symtree
= gfc_find_symtree (gfc_current_ns
->sym_root
,
9580 GFC_PREFIX ("lock_type"));
9582 lock_type
= symtree
->n
.sym
;
9585 if (gfc_get_sym_tree (GFC_PREFIX ("lock_type"), gfc_current_ns
, &symtree
,
9588 lock_type
= symtree
->n
.sym
;
9589 lock_type
->attr
.flavor
= FL_DERIVED
;
9590 lock_type
->attr
.zero_comp
= 1;
9591 lock_type
->from_intmod
= INTMOD_ISO_FORTRAN_ENV
;
9592 lock_type
->intmod_sym_id
= ISOFORTRAN_LOCK_TYPE
;
9595 sprintf(name
, GFC_PREFIX ("lock_var") "%d",serial
++);
9596 if (gfc_get_sym_tree (name
, gfc_current_ns
, &symtree
, false) != 0)
9599 code
->resolved_sym
= symtree
->n
.sym
;
9600 symtree
->n
.sym
->attr
.flavor
= FL_VARIABLE
;
9601 symtree
->n
.sym
->attr
.referenced
= 1;
9602 symtree
->n
.sym
->attr
.artificial
= 1;
9603 symtree
->n
.sym
->attr
.codimension
= 1;
9604 symtree
->n
.sym
->ts
.type
= BT_DERIVED
;
9605 symtree
->n
.sym
->ts
.u
.derived
= lock_type
;
9606 symtree
->n
.sym
->as
= gfc_get_array_spec ();
9607 symtree
->n
.sym
->as
->corank
= 1;
9608 symtree
->n
.sym
->as
->type
= AS_EXPLICIT
;
9609 symtree
->n
.sym
->as
->cotype
= AS_EXPLICIT
;
9610 symtree
->n
.sym
->as
->lower
[0] = gfc_get_int_expr (gfc_default_integer_kind
,
9612 gfc_commit_symbols();
9617 resolve_sync (gfc_code
*code
)
9619 /* Check imageset. The * case matches expr1 == NULL. */
9622 if (code
->expr1
->ts
.type
!= BT_INTEGER
|| code
->expr1
->rank
> 1)
9623 gfc_error ("Imageset argument at %L must be a scalar or rank-1 "
9624 "INTEGER expression", &code
->expr1
->where
);
9625 if (code
->expr1
->expr_type
== EXPR_CONSTANT
&& code
->expr1
->rank
== 0
9626 && mpz_cmp_si (code
->expr1
->value
.integer
, 1) < 0)
9627 gfc_error ("Imageset argument at %L must between 1 and num_images()",
9628 &code
->expr1
->where
);
9629 else if (code
->expr1
->expr_type
== EXPR_ARRAY
9630 && gfc_simplify_expr (code
->expr1
, 0))
9632 gfc_constructor
*cons
;
9633 cons
= gfc_constructor_first (code
->expr1
->value
.constructor
);
9634 for (; cons
; cons
= gfc_constructor_next (cons
))
9635 if (cons
->expr
->expr_type
== EXPR_CONSTANT
9636 && mpz_cmp_si (cons
->expr
->value
.integer
, 1) < 0)
9637 gfc_error ("Imageset argument at %L must between 1 and "
9638 "num_images()", &cons
->expr
->where
);
9643 gfc_resolve_expr (code
->expr2
);
9645 && (code
->expr2
->ts
.type
!= BT_INTEGER
|| code
->expr2
->rank
!= 0
9646 || code
->expr2
->expr_type
!= EXPR_VARIABLE
))
9647 gfc_error ("STAT= argument at %L must be a scalar INTEGER variable",
9648 &code
->expr2
->where
);
9651 gfc_resolve_expr (code
->expr3
);
9653 && (code
->expr3
->ts
.type
!= BT_CHARACTER
|| code
->expr3
->rank
!= 0
9654 || code
->expr3
->expr_type
!= EXPR_VARIABLE
))
9655 gfc_error ("ERRMSG= argument at %L must be a scalar CHARACTER variable",
9656 &code
->expr3
->where
);
9660 /* Given a branch to a label, see if the branch is conforming.
9661 The code node describes where the branch is located. */
9664 resolve_branch (gfc_st_label
*label
, gfc_code
*code
)
9671 /* Step one: is this a valid branching target? */
9673 if (label
->defined
== ST_LABEL_UNKNOWN
)
9675 gfc_error ("Label %d referenced at %L is never defined", label
->value
,
9680 if (label
->defined
!= ST_LABEL_TARGET
&& label
->defined
!= ST_LABEL_DO_TARGET
)
9682 gfc_error ("Statement at %L is not a valid branch target statement "
9683 "for the branch statement at %L", &label
->where
, &code
->loc
);
9687 /* Step two: make sure this branch is not a branch to itself ;-) */
9689 if (code
->here
== label
)
9692 "Branch at %L may result in an infinite loop", &code
->loc
);
9696 /* Step three: See if the label is in the same block as the
9697 branching statement. The hard work has been done by setting up
9698 the bitmap reachable_labels. */
9700 if (bitmap_bit_p (cs_base
->reachable_labels
, label
->value
))
9702 /* Check now whether there is a CRITICAL construct; if so, check
9703 whether the label is still visible outside of the CRITICAL block,
9704 which is invalid. */
9705 for (stack
= cs_base
; stack
; stack
= stack
->prev
)
9707 if (stack
->current
->op
== EXEC_CRITICAL
9708 && bitmap_bit_p (stack
->reachable_labels
, label
->value
))
9709 gfc_error ("GOTO statement at %L leaves CRITICAL construct for "
9710 "label at %L", &code
->loc
, &label
->where
);
9711 else if (stack
->current
->op
== EXEC_DO_CONCURRENT
9712 && bitmap_bit_p (stack
->reachable_labels
, label
->value
))
9713 gfc_error ("GOTO statement at %L leaves DO CONCURRENT construct "
9714 "for label at %L", &code
->loc
, &label
->where
);
9720 /* Step four: If we haven't found the label in the bitmap, it may
9721 still be the label of the END of the enclosing block, in which
9722 case we find it by going up the code_stack. */
9724 for (stack
= cs_base
; stack
; stack
= stack
->prev
)
9726 if (stack
->current
->next
&& stack
->current
->next
->here
== label
)
9728 if (stack
->current
->op
== EXEC_CRITICAL
)
9730 /* Note: A label at END CRITICAL does not leave the CRITICAL
9731 construct as END CRITICAL is still part of it. */
9732 gfc_error ("GOTO statement at %L leaves CRITICAL construct for label"
9733 " at %L", &code
->loc
, &label
->where
);
9736 else if (stack
->current
->op
== EXEC_DO_CONCURRENT
)
9738 gfc_error ("GOTO statement at %L leaves DO CONCURRENT construct for "
9739 "label at %L", &code
->loc
, &label
->where
);
9746 gcc_assert (stack
->current
->next
->op
== EXEC_END_NESTED_BLOCK
);
9750 /* The label is not in an enclosing block, so illegal. This was
9751 allowed in Fortran 66, so we allow it as extension. No
9752 further checks are necessary in this case. */
9753 gfc_notify_std (GFC_STD_LEGACY
, "Label at %L is not in the same block "
9754 "as the GOTO statement at %L", &label
->where
,
9760 /* Check whether EXPR1 has the same shape as EXPR2. */
9763 resolve_where_shape (gfc_expr
*expr1
, gfc_expr
*expr2
)
9765 mpz_t shape
[GFC_MAX_DIMENSIONS
];
9766 mpz_t shape2
[GFC_MAX_DIMENSIONS
];
9767 bool result
= false;
9770 /* Compare the rank. */
9771 if (expr1
->rank
!= expr2
->rank
)
9774 /* Compare the size of each dimension. */
9775 for (i
=0; i
<expr1
->rank
; i
++)
9777 if (!gfc_array_dimen_size (expr1
, i
, &shape
[i
]))
9780 if (!gfc_array_dimen_size (expr2
, i
, &shape2
[i
]))
9783 if (mpz_cmp (shape
[i
], shape2
[i
]))
9787 /* When either of the two expression is an assumed size array, we
9788 ignore the comparison of dimension sizes. */
9793 gfc_clear_shape (shape
, i
);
9794 gfc_clear_shape (shape2
, i
);
9799 /* Check whether a WHERE assignment target or a WHERE mask expression
9800 has the same shape as the outmost WHERE mask expression. */
9803 resolve_where (gfc_code
*code
, gfc_expr
*mask
)
9809 cblock
= code
->block
;
9811 /* Store the first WHERE mask-expr of the WHERE statement or construct.
9812 In case of nested WHERE, only the outmost one is stored. */
9813 if (mask
== NULL
) /* outmost WHERE */
9815 else /* inner WHERE */
9822 /* Check if the mask-expr has a consistent shape with the
9823 outmost WHERE mask-expr. */
9824 if (!resolve_where_shape (cblock
->expr1
, e
))
9825 gfc_error ("WHERE mask at %L has inconsistent shape",
9826 &cblock
->expr1
->where
);
9829 /* the assignment statement of a WHERE statement, or the first
9830 statement in where-body-construct of a WHERE construct */
9831 cnext
= cblock
->next
;
9836 /* WHERE assignment statement */
9839 /* Check shape consistent for WHERE assignment target. */
9840 if (e
&& !resolve_where_shape (cnext
->expr1
, e
))
9841 gfc_error ("WHERE assignment target at %L has "
9842 "inconsistent shape", &cnext
->expr1
->where
);
9846 case EXEC_ASSIGN_CALL
:
9847 resolve_call (cnext
);
9848 if (!cnext
->resolved_sym
->attr
.elemental
)
9849 gfc_error("Non-ELEMENTAL user-defined assignment in WHERE at %L",
9850 &cnext
->ext
.actual
->expr
->where
);
9853 /* WHERE or WHERE construct is part of a where-body-construct */
9855 resolve_where (cnext
, e
);
9859 gfc_error ("Unsupported statement inside WHERE at %L",
9862 /* the next statement within the same where-body-construct */
9863 cnext
= cnext
->next
;
9865 /* the next masked-elsewhere-stmt, elsewhere-stmt, or end-where-stmt */
9866 cblock
= cblock
->block
;
9871 /* Resolve assignment in FORALL construct.
9872 NVAR is the number of FORALL index variables, and VAR_EXPR records the
9873 FORALL index variables. */
9876 gfc_resolve_assign_in_forall (gfc_code
*code
, int nvar
, gfc_expr
**var_expr
)
9880 for (n
= 0; n
< nvar
; n
++)
9882 gfc_symbol
*forall_index
;
9884 forall_index
= var_expr
[n
]->symtree
->n
.sym
;
9886 /* Check whether the assignment target is one of the FORALL index
9888 if ((code
->expr1
->expr_type
== EXPR_VARIABLE
)
9889 && (code
->expr1
->symtree
->n
.sym
== forall_index
))
9890 gfc_error ("Assignment to a FORALL index variable at %L",
9891 &code
->expr1
->where
);
9894 /* If one of the FORALL index variables doesn't appear in the
9895 assignment variable, then there could be a many-to-one
9896 assignment. Emit a warning rather than an error because the
9897 mask could be resolving this problem. */
9898 if (!find_forall_index (code
->expr1
, forall_index
, 0))
9899 gfc_warning (0, "The FORALL with index %qs is not used on the "
9900 "left side of the assignment at %L and so might "
9901 "cause multiple assignment to this object",
9902 var_expr
[n
]->symtree
->name
, &code
->expr1
->where
);
9908 /* Resolve WHERE statement in FORALL construct. */
9911 gfc_resolve_where_code_in_forall (gfc_code
*code
, int nvar
,
9912 gfc_expr
**var_expr
)
9917 cblock
= code
->block
;
9920 /* the assignment statement of a WHERE statement, or the first
9921 statement in where-body-construct of a WHERE construct */
9922 cnext
= cblock
->next
;
9927 /* WHERE assignment statement */
9929 gfc_resolve_assign_in_forall (cnext
, nvar
, var_expr
);
9932 /* WHERE operator assignment statement */
9933 case EXEC_ASSIGN_CALL
:
9934 resolve_call (cnext
);
9935 if (!cnext
->resolved_sym
->attr
.elemental
)
9936 gfc_error("Non-ELEMENTAL user-defined assignment in WHERE at %L",
9937 &cnext
->ext
.actual
->expr
->where
);
9940 /* WHERE or WHERE construct is part of a where-body-construct */
9942 gfc_resolve_where_code_in_forall (cnext
, nvar
, var_expr
);
9946 gfc_error ("Unsupported statement inside WHERE at %L",
9949 /* the next statement within the same where-body-construct */
9950 cnext
= cnext
->next
;
9952 /* the next masked-elsewhere-stmt, elsewhere-stmt, or end-where-stmt */
9953 cblock
= cblock
->block
;
9958 /* Traverse the FORALL body to check whether the following errors exist:
9959 1. For assignment, check if a many-to-one assignment happens.
9960 2. For WHERE statement, check the WHERE body to see if there is any
9961 many-to-one assignment. */
9964 gfc_resolve_forall_body (gfc_code
*code
, int nvar
, gfc_expr
**var_expr
)
9968 c
= code
->block
->next
;
9974 case EXEC_POINTER_ASSIGN
:
9975 gfc_resolve_assign_in_forall (c
, nvar
, var_expr
);
9978 case EXEC_ASSIGN_CALL
:
9982 /* Because the gfc_resolve_blocks() will handle the nested FORALL,
9983 there is no need to handle it here. */
9987 gfc_resolve_where_code_in_forall(c
, nvar
, var_expr
);
9992 /* The next statement in the FORALL body. */
9998 /* Counts the number of iterators needed inside a forall construct, including
9999 nested forall constructs. This is used to allocate the needed memory
10000 in gfc_resolve_forall. */
10003 gfc_count_forall_iterators (gfc_code
*code
)
10005 int max_iters
, sub_iters
, current_iters
;
10006 gfc_forall_iterator
*fa
;
10008 gcc_assert(code
->op
== EXEC_FORALL
);
10012 for (fa
= code
->ext
.forall_iterator
; fa
; fa
= fa
->next
)
10015 code
= code
->block
->next
;
10019 if (code
->op
== EXEC_FORALL
)
10021 sub_iters
= gfc_count_forall_iterators (code
);
10022 if (sub_iters
> max_iters
)
10023 max_iters
= sub_iters
;
10028 return current_iters
+ max_iters
;
10032 /* Given a FORALL construct, first resolve the FORALL iterator, then call
10033 gfc_resolve_forall_body to resolve the FORALL body. */
10036 gfc_resolve_forall (gfc_code
*code
, gfc_namespace
*ns
, int forall_save
)
10038 static gfc_expr
**var_expr
;
10039 static int total_var
= 0;
10040 static int nvar
= 0;
10041 int i
, old_nvar
, tmp
;
10042 gfc_forall_iterator
*fa
;
10046 if (!gfc_notify_std (GFC_STD_F2018_OBS
, "FORALL construct at %L", &code
->loc
))
10049 /* Start to resolve a FORALL construct */
10050 if (forall_save
== 0)
10052 /* Count the total number of FORALL indices in the nested FORALL
10053 construct in order to allocate the VAR_EXPR with proper size. */
10054 total_var
= gfc_count_forall_iterators (code
);
10056 /* Allocate VAR_EXPR with NUMBER_OF_FORALL_INDEX elements. */
10057 var_expr
= XCNEWVEC (gfc_expr
*, total_var
);
10060 /* The information about FORALL iterator, including FORALL indices start, end
10061 and stride. An outer FORALL indice cannot appear in start, end or stride. */
10062 for (fa
= code
->ext
.forall_iterator
; fa
; fa
= fa
->next
)
10064 /* Fortran 20008: C738 (R753). */
10065 if (fa
->var
->ref
&& fa
->var
->ref
->type
== REF_ARRAY
)
10067 gfc_error ("FORALL index-name at %L must be a scalar variable "
10068 "of type integer", &fa
->var
->where
);
10072 /* Check if any outer FORALL index name is the same as the current
10074 for (i
= 0; i
< nvar
; i
++)
10076 if (fa
->var
->symtree
->n
.sym
== var_expr
[i
]->symtree
->n
.sym
)
10077 gfc_error ("An outer FORALL construct already has an index "
10078 "with this name %L", &fa
->var
->where
);
10081 /* Record the current FORALL index. */
10082 var_expr
[nvar
] = gfc_copy_expr (fa
->var
);
10086 /* No memory leak. */
10087 gcc_assert (nvar
<= total_var
);
10090 /* Resolve the FORALL body. */
10091 gfc_resolve_forall_body (code
, nvar
, var_expr
);
10093 /* May call gfc_resolve_forall to resolve the inner FORALL loop. */
10094 gfc_resolve_blocks (code
->block
, ns
);
10098 /* Free only the VAR_EXPRs allocated in this frame. */
10099 for (i
= nvar
; i
< tmp
; i
++)
10100 gfc_free_expr (var_expr
[i
]);
10104 /* We are in the outermost FORALL construct. */
10105 gcc_assert (forall_save
== 0);
10107 /* VAR_EXPR is not needed any more. */
10114 /* Resolve a BLOCK construct statement. */
10117 resolve_block_construct (gfc_code
* code
)
10119 /* Resolve the BLOCK's namespace. */
10120 gfc_resolve (code
->ext
.block
.ns
);
10122 /* For an ASSOCIATE block, the associations (and their targets) are already
10123 resolved during resolve_symbol. */
10127 /* Resolve lists of blocks found in IF, SELECT CASE, WHERE, FORALL, GOTO and
10131 gfc_resolve_blocks (gfc_code
*b
, gfc_namespace
*ns
)
10135 for (; b
; b
= b
->block
)
10137 t
= gfc_resolve_expr (b
->expr1
);
10138 if (!gfc_resolve_expr (b
->expr2
))
10144 if (t
&& b
->expr1
!= NULL
10145 && (b
->expr1
->ts
.type
!= BT_LOGICAL
|| b
->expr1
->rank
!= 0))
10146 gfc_error ("IF clause at %L requires a scalar LOGICAL expression",
10152 && b
->expr1
!= NULL
10153 && (b
->expr1
->ts
.type
!= BT_LOGICAL
|| b
->expr1
->rank
== 0))
10154 gfc_error ("WHERE/ELSEWHERE clause at %L requires a LOGICAL array",
10159 resolve_branch (b
->label1
, b
);
10163 resolve_block_construct (b
);
10167 case EXEC_SELECT_TYPE
:
10170 case EXEC_DO_WHILE
:
10171 case EXEC_DO_CONCURRENT
:
10172 case EXEC_CRITICAL
:
10175 case EXEC_IOLENGTH
:
10179 case EXEC_OMP_ATOMIC
:
10180 case EXEC_OACC_ATOMIC
:
10182 gfc_omp_atomic_op aop
10183 = (gfc_omp_atomic_op
) (b
->ext
.omp_atomic
& GFC_OMP_ATOMIC_MASK
);
10185 /* Verify this before calling gfc_resolve_code, which might
10187 gcc_assert (b
->next
&& b
->next
->op
== EXEC_ASSIGN
);
10188 gcc_assert (((aop
!= GFC_OMP_ATOMIC_CAPTURE
)
10189 && b
->next
->next
== NULL
)
10190 || ((aop
== GFC_OMP_ATOMIC_CAPTURE
)
10191 && b
->next
->next
!= NULL
10192 && b
->next
->next
->op
== EXEC_ASSIGN
10193 && b
->next
->next
->next
== NULL
));
10197 case EXEC_OACC_PARALLEL_LOOP
:
10198 case EXEC_OACC_PARALLEL
:
10199 case EXEC_OACC_KERNELS_LOOP
:
10200 case EXEC_OACC_KERNELS
:
10201 case EXEC_OACC_DATA
:
10202 case EXEC_OACC_HOST_DATA
:
10203 case EXEC_OACC_LOOP
:
10204 case EXEC_OACC_UPDATE
:
10205 case EXEC_OACC_WAIT
:
10206 case EXEC_OACC_CACHE
:
10207 case EXEC_OACC_ENTER_DATA
:
10208 case EXEC_OACC_EXIT_DATA
:
10209 case EXEC_OACC_ROUTINE
:
10210 case EXEC_OMP_CRITICAL
:
10211 case EXEC_OMP_DISTRIBUTE
:
10212 case EXEC_OMP_DISTRIBUTE_PARALLEL_DO
:
10213 case EXEC_OMP_DISTRIBUTE_PARALLEL_DO_SIMD
:
10214 case EXEC_OMP_DISTRIBUTE_SIMD
:
10216 case EXEC_OMP_DO_SIMD
:
10217 case EXEC_OMP_MASTER
:
10218 case EXEC_OMP_ORDERED
:
10219 case EXEC_OMP_PARALLEL
:
10220 case EXEC_OMP_PARALLEL_DO
:
10221 case EXEC_OMP_PARALLEL_DO_SIMD
:
10222 case EXEC_OMP_PARALLEL_SECTIONS
:
10223 case EXEC_OMP_PARALLEL_WORKSHARE
:
10224 case EXEC_OMP_SECTIONS
:
10225 case EXEC_OMP_SIMD
:
10226 case EXEC_OMP_SINGLE
:
10227 case EXEC_OMP_TARGET
:
10228 case EXEC_OMP_TARGET_DATA
:
10229 case EXEC_OMP_TARGET_ENTER_DATA
:
10230 case EXEC_OMP_TARGET_EXIT_DATA
:
10231 case EXEC_OMP_TARGET_PARALLEL
:
10232 case EXEC_OMP_TARGET_PARALLEL_DO
:
10233 case EXEC_OMP_TARGET_PARALLEL_DO_SIMD
:
10234 case EXEC_OMP_TARGET_SIMD
:
10235 case EXEC_OMP_TARGET_TEAMS
:
10236 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE
:
10237 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO
:
10238 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
10239 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_SIMD
:
10240 case EXEC_OMP_TARGET_UPDATE
:
10241 case EXEC_OMP_TASK
:
10242 case EXEC_OMP_TASKGROUP
:
10243 case EXEC_OMP_TASKLOOP
:
10244 case EXEC_OMP_TASKLOOP_SIMD
:
10245 case EXEC_OMP_TASKWAIT
:
10246 case EXEC_OMP_TASKYIELD
:
10247 case EXEC_OMP_TEAMS
:
10248 case EXEC_OMP_TEAMS_DISTRIBUTE
:
10249 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO
:
10250 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
10251 case EXEC_OMP_TEAMS_DISTRIBUTE_SIMD
:
10252 case EXEC_OMP_WORKSHARE
:
10256 gfc_internal_error ("gfc_resolve_blocks(): Bad block type");
10259 gfc_resolve_code (b
->next
, ns
);
10264 /* Does everything to resolve an ordinary assignment. Returns true
10265 if this is an interface assignment. */
10267 resolve_ordinary_assign (gfc_code
*code
, gfc_namespace
*ns
)
10274 symbol_attribute attr
;
10276 if (gfc_extend_assign (code
, ns
))
10280 if (code
->op
== EXEC_ASSIGN_CALL
)
10282 lhs
= code
->ext
.actual
->expr
;
10283 rhsptr
= &code
->ext
.actual
->next
->expr
;
10287 gfc_actual_arglist
* args
;
10288 gfc_typebound_proc
* tbp
;
10290 gcc_assert (code
->op
== EXEC_COMPCALL
);
10292 args
= code
->expr1
->value
.compcall
.actual
;
10294 rhsptr
= &args
->next
->expr
;
10296 tbp
= code
->expr1
->value
.compcall
.tbp
;
10297 gcc_assert (!tbp
->is_generic
);
10300 /* Make a temporary rhs when there is a default initializer
10301 and rhs is the same symbol as the lhs. */
10302 if ((*rhsptr
)->expr_type
== EXPR_VARIABLE
10303 && (*rhsptr
)->symtree
->n
.sym
->ts
.type
== BT_DERIVED
10304 && gfc_has_default_initializer ((*rhsptr
)->symtree
->n
.sym
->ts
.u
.derived
)
10305 && (lhs
->symtree
->n
.sym
== (*rhsptr
)->symtree
->n
.sym
))
10306 *rhsptr
= gfc_get_parentheses (*rhsptr
);
10315 && !gfc_notify_std (GFC_STD_GNU
, "BOZ literal at %L outside "
10316 "a DATA statement and outside INT/REAL/DBLE/CMPLX",
10320 /* Handle the case of a BOZ literal on the RHS. */
10321 if (rhs
->is_boz
&& lhs
->ts
.type
!= BT_INTEGER
)
10324 if (warn_surprising
)
10325 gfc_warning (OPT_Wsurprising
,
10326 "BOZ literal at %L is bitwise transferred "
10327 "non-integer symbol %qs", &code
->loc
,
10328 lhs
->symtree
->n
.sym
->name
);
10330 if (!gfc_convert_boz (rhs
, &lhs
->ts
))
10332 if ((rc
= gfc_range_check (rhs
)) != ARITH_OK
)
10334 if (rc
== ARITH_UNDERFLOW
)
10335 gfc_error ("Arithmetic underflow of bit-wise transferred BOZ at %L"
10336 ". This check can be disabled with the option "
10337 "%<-fno-range-check%>", &rhs
->where
);
10338 else if (rc
== ARITH_OVERFLOW
)
10339 gfc_error ("Arithmetic overflow of bit-wise transferred BOZ at %L"
10340 ". This check can be disabled with the option "
10341 "%<-fno-range-check%>", &rhs
->where
);
10342 else if (rc
== ARITH_NAN
)
10343 gfc_error ("Arithmetic NaN of bit-wise transferred BOZ at %L"
10344 ". This check can be disabled with the option "
10345 "%<-fno-range-check%>", &rhs
->where
);
10350 if (lhs
->ts
.type
== BT_CHARACTER
10351 && warn_character_truncation
)
10353 HOST_WIDE_INT llen
= 0, rlen
= 0;
10354 if (lhs
->ts
.u
.cl
!= NULL
10355 && lhs
->ts
.u
.cl
->length
!= NULL
10356 && lhs
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
)
10357 llen
= gfc_mpz_get_hwi (lhs
->ts
.u
.cl
->length
->value
.integer
);
10359 if (rhs
->expr_type
== EXPR_CONSTANT
)
10360 rlen
= rhs
->value
.character
.length
;
10362 else if (rhs
->ts
.u
.cl
!= NULL
10363 && rhs
->ts
.u
.cl
->length
!= NULL
10364 && rhs
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
)
10365 rlen
= gfc_mpz_get_hwi (rhs
->ts
.u
.cl
->length
->value
.integer
);
10367 if (rlen
&& llen
&& rlen
> llen
)
10368 gfc_warning_now (OPT_Wcharacter_truncation
,
10369 "CHARACTER expression will be truncated "
10370 "in assignment (%ld/%ld) at %L",
10371 (long) llen
, (long) rlen
, &code
->loc
);
10374 /* Ensure that a vector index expression for the lvalue is evaluated
10375 to a temporary if the lvalue symbol is referenced in it. */
10378 for (ref
= lhs
->ref
; ref
; ref
= ref
->next
)
10379 if (ref
->type
== REF_ARRAY
)
10381 for (n
= 0; n
< ref
->u
.ar
.dimen
; n
++)
10382 if (ref
->u
.ar
.dimen_type
[n
] == DIMEN_VECTOR
10383 && gfc_find_sym_in_expr (lhs
->symtree
->n
.sym
,
10384 ref
->u
.ar
.start
[n
]))
10386 = gfc_get_parentheses (ref
->u
.ar
.start
[n
]);
10390 if (gfc_pure (NULL
))
10392 if (lhs
->ts
.type
== BT_DERIVED
10393 && lhs
->expr_type
== EXPR_VARIABLE
10394 && lhs
->ts
.u
.derived
->attr
.pointer_comp
10395 && rhs
->expr_type
== EXPR_VARIABLE
10396 && (gfc_impure_variable (rhs
->symtree
->n
.sym
)
10397 || gfc_is_coindexed (rhs
)))
10399 /* F2008, C1283. */
10400 if (gfc_is_coindexed (rhs
))
10401 gfc_error ("Coindexed expression at %L is assigned to "
10402 "a derived type variable with a POINTER "
10403 "component in a PURE procedure",
10406 gfc_error ("The impure variable at %L is assigned to "
10407 "a derived type variable with a POINTER "
10408 "component in a PURE procedure (12.6)",
10413 /* Fortran 2008, C1283. */
10414 if (gfc_is_coindexed (lhs
))
10416 gfc_error ("Assignment to coindexed variable at %L in a PURE "
10417 "procedure", &rhs
->where
);
10422 if (gfc_implicit_pure (NULL
))
10424 if (lhs
->expr_type
== EXPR_VARIABLE
10425 && lhs
->symtree
->n
.sym
!= gfc_current_ns
->proc_name
10426 && lhs
->symtree
->n
.sym
->ns
!= gfc_current_ns
)
10427 gfc_unset_implicit_pure (NULL
);
10429 if (lhs
->ts
.type
== BT_DERIVED
10430 && lhs
->expr_type
== EXPR_VARIABLE
10431 && lhs
->ts
.u
.derived
->attr
.pointer_comp
10432 && rhs
->expr_type
== EXPR_VARIABLE
10433 && (gfc_impure_variable (rhs
->symtree
->n
.sym
)
10434 || gfc_is_coindexed (rhs
)))
10435 gfc_unset_implicit_pure (NULL
);
10437 /* Fortran 2008, C1283. */
10438 if (gfc_is_coindexed (lhs
))
10439 gfc_unset_implicit_pure (NULL
);
10442 /* F2008, 7.2.1.2. */
10443 attr
= gfc_expr_attr (lhs
);
10444 if (lhs
->ts
.type
== BT_CLASS
&& attr
.allocatable
)
10446 if (attr
.codimension
)
10448 gfc_error ("Assignment to polymorphic coarray at %L is not "
10449 "permitted", &lhs
->where
);
10452 if (!gfc_notify_std (GFC_STD_F2008
, "Assignment to an allocatable "
10453 "polymorphic variable at %L", &lhs
->where
))
10455 if (!flag_realloc_lhs
)
10457 gfc_error ("Assignment to an allocatable polymorphic variable at %L "
10458 "requires %<-frealloc-lhs%>", &lhs
->where
);
10462 else if (lhs
->ts
.type
== BT_CLASS
)
10464 gfc_error ("Nonallocatable variable must not be polymorphic in intrinsic "
10465 "assignment at %L - check that there is a matching specific "
10466 "subroutine for '=' operator", &lhs
->where
);
10470 bool lhs_coindexed
= gfc_is_coindexed (lhs
);
10472 /* F2008, Section 7.2.1.2. */
10473 if (lhs_coindexed
&& gfc_has_ultimate_allocatable (lhs
))
10475 gfc_error ("Coindexed variable must not have an allocatable ultimate "
10476 "component in assignment at %L", &lhs
->where
);
10480 /* Assign the 'data' of a class object to a derived type. */
10481 if (lhs
->ts
.type
== BT_DERIVED
10482 && rhs
->ts
.type
== BT_CLASS
10483 && rhs
->expr_type
!= EXPR_ARRAY
)
10484 gfc_add_data_component (rhs
);
10486 /* Make sure there is a vtable and, in particular, a _copy for the
10488 if (UNLIMITED_POLY (lhs
) && lhs
->rank
&& rhs
->ts
.type
!= BT_CLASS
)
10489 gfc_find_vtab (&rhs
->ts
);
10491 bool caf_convert_to_send
= flag_coarray
== GFC_FCOARRAY_LIB
10493 || (code
->expr2
->expr_type
== EXPR_FUNCTION
10494 && code
->expr2
->value
.function
.isym
10495 && code
->expr2
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
10496 && (code
->expr1
->rank
== 0 || code
->expr2
->rank
!= 0)
10497 && !gfc_expr_attr (rhs
).allocatable
10498 && !gfc_has_vector_subscript (rhs
)));
10500 gfc_check_assign (lhs
, rhs
, 1, !caf_convert_to_send
);
10502 /* Insert a GFC_ISYM_CAF_SEND intrinsic, when the LHS is a coindexed variable.
10503 Additionally, insert this code when the RHS is a CAF as we then use the
10504 GFC_ISYM_CAF_SEND intrinsic just to avoid a temporary; but do not do so if
10505 the LHS is (re)allocatable or has a vector subscript. If the LHS is a
10506 noncoindexed array and the RHS is a coindexed scalar, use the normal code
10508 if (caf_convert_to_send
)
10510 if (code
->expr2
->expr_type
== EXPR_FUNCTION
10511 && code
->expr2
->value
.function
.isym
10512 && code
->expr2
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
)
10513 remove_caf_get_intrinsic (code
->expr2
);
10514 code
->op
= EXEC_CALL
;
10515 gfc_get_sym_tree (GFC_PREFIX ("caf_send"), ns
, &code
->symtree
, true);
10516 code
->resolved_sym
= code
->symtree
->n
.sym
;
10517 code
->resolved_sym
->attr
.flavor
= FL_PROCEDURE
;
10518 code
->resolved_sym
->attr
.intrinsic
= 1;
10519 code
->resolved_sym
->attr
.subroutine
= 1;
10520 code
->resolved_isym
= gfc_intrinsic_subroutine_by_id (GFC_ISYM_CAF_SEND
);
10521 gfc_commit_symbol (code
->resolved_sym
);
10522 code
->ext
.actual
= gfc_get_actual_arglist ();
10523 code
->ext
.actual
->expr
= lhs
;
10524 code
->ext
.actual
->next
= gfc_get_actual_arglist ();
10525 code
->ext
.actual
->next
->expr
= rhs
;
10526 code
->expr1
= NULL
;
10527 code
->expr2
= NULL
;
10534 /* Add a component reference onto an expression. */
10537 add_comp_ref (gfc_expr
*e
, gfc_component
*c
)
10542 ref
= &((*ref
)->next
);
10543 *ref
= gfc_get_ref ();
10544 (*ref
)->type
= REF_COMPONENT
;
10545 (*ref
)->u
.c
.sym
= e
->ts
.u
.derived
;
10546 (*ref
)->u
.c
.component
= c
;
10549 /* Add a full array ref, as necessary. */
10552 gfc_add_full_array_ref (e
, c
->as
);
10553 e
->rank
= c
->as
->rank
;
10558 /* Build an assignment. Keep the argument 'op' for future use, so that
10559 pointer assignments can be made. */
10562 build_assignment (gfc_exec_op op
, gfc_expr
*expr1
, gfc_expr
*expr2
,
10563 gfc_component
*comp1
, gfc_component
*comp2
, locus loc
)
10565 gfc_code
*this_code
;
10567 this_code
= gfc_get_code (op
);
10568 this_code
->next
= NULL
;
10569 this_code
->expr1
= gfc_copy_expr (expr1
);
10570 this_code
->expr2
= gfc_copy_expr (expr2
);
10571 this_code
->loc
= loc
;
10572 if (comp1
&& comp2
)
10574 add_comp_ref (this_code
->expr1
, comp1
);
10575 add_comp_ref (this_code
->expr2
, comp2
);
10582 /* Makes a temporary variable expression based on the characteristics of
10583 a given variable expression. */
10586 get_temp_from_expr (gfc_expr
*e
, gfc_namespace
*ns
)
10588 static int serial
= 0;
10589 char name
[GFC_MAX_SYMBOL_LEN
];
10591 gfc_array_spec
*as
;
10592 gfc_array_ref
*aref
;
10595 sprintf (name
, GFC_PREFIX("DA%d"), serial
++);
10596 gfc_get_sym_tree (name
, ns
, &tmp
, false);
10597 gfc_add_type (tmp
->n
.sym
, &e
->ts
, NULL
);
10603 /* Obtain the arrayspec for the temporary. */
10604 if (e
->rank
&& e
->expr_type
!= EXPR_ARRAY
10605 && e
->expr_type
!= EXPR_FUNCTION
10606 && e
->expr_type
!= EXPR_OP
)
10608 aref
= gfc_find_array_ref (e
);
10609 if (e
->expr_type
== EXPR_VARIABLE
10610 && e
->symtree
->n
.sym
->as
== aref
->as
)
10614 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
10615 if (ref
->type
== REF_COMPONENT
10616 && ref
->u
.c
.component
->as
== aref
->as
)
10624 /* Add the attributes and the arrayspec to the temporary. */
10625 tmp
->n
.sym
->attr
= gfc_expr_attr (e
);
10626 tmp
->n
.sym
->attr
.function
= 0;
10627 tmp
->n
.sym
->attr
.result
= 0;
10628 tmp
->n
.sym
->attr
.flavor
= FL_VARIABLE
;
10629 tmp
->n
.sym
->attr
.dummy
= 0;
10630 tmp
->n
.sym
->attr
.intent
= INTENT_UNKNOWN
;
10634 tmp
->n
.sym
->as
= gfc_copy_array_spec (as
);
10637 if (as
->type
== AS_DEFERRED
)
10638 tmp
->n
.sym
->attr
.allocatable
= 1;
10640 else if (e
->rank
&& (e
->expr_type
== EXPR_ARRAY
10641 || e
->expr_type
== EXPR_FUNCTION
10642 || e
->expr_type
== EXPR_OP
))
10644 tmp
->n
.sym
->as
= gfc_get_array_spec ();
10645 tmp
->n
.sym
->as
->type
= AS_DEFERRED
;
10646 tmp
->n
.sym
->as
->rank
= e
->rank
;
10647 tmp
->n
.sym
->attr
.allocatable
= 1;
10648 tmp
->n
.sym
->attr
.dimension
= 1;
10651 tmp
->n
.sym
->attr
.dimension
= 0;
10653 gfc_set_sym_referenced (tmp
->n
.sym
);
10654 gfc_commit_symbol (tmp
->n
.sym
);
10655 e
= gfc_lval_expr_from_sym (tmp
->n
.sym
);
10657 /* Should the lhs be a section, use its array ref for the
10658 temporary expression. */
10659 if (aref
&& aref
->type
!= AR_FULL
)
10661 gfc_free_ref_list (e
->ref
);
10662 e
->ref
= gfc_copy_ref (ref
);
10668 /* Add one line of code to the code chain, making sure that 'head' and
10669 'tail' are appropriately updated. */
10672 add_code_to_chain (gfc_code
**this_code
, gfc_code
**head
, gfc_code
**tail
)
10674 gcc_assert (this_code
);
10676 *head
= *tail
= *this_code
;
10678 *tail
= gfc_append_code (*tail
, *this_code
);
10683 /* Counts the potential number of part array references that would
10684 result from resolution of typebound defined assignments. */
10687 nonscalar_typebound_assign (gfc_symbol
*derived
, int depth
)
10690 int c_depth
= 0, t_depth
;
10692 for (c
= derived
->components
; c
; c
= c
->next
)
10694 if ((!gfc_bt_struct (c
->ts
.type
)
10696 || c
->attr
.allocatable
10697 || c
->attr
.proc_pointer_comp
10698 || c
->attr
.class_pointer
10699 || c
->attr
.proc_pointer
)
10700 && !c
->attr
.defined_assign_comp
)
10703 if (c
->as
&& c_depth
== 0)
10706 if (c
->ts
.u
.derived
->attr
.defined_assign_comp
)
10707 t_depth
= nonscalar_typebound_assign (c
->ts
.u
.derived
,
10712 c_depth
= t_depth
> c_depth
? t_depth
: c_depth
;
10714 return depth
+ c_depth
;
10718 /* Implement 7.2.1.3 of the F08 standard:
10719 "An intrinsic assignment where the variable is of derived type is
10720 performed as if each component of the variable were assigned from the
10721 corresponding component of expr using pointer assignment (7.2.2) for
10722 each pointer component, defined assignment for each nonpointer
10723 nonallocatable component of a type that has a type-bound defined
10724 assignment consistent with the component, intrinsic assignment for
10725 each other nonpointer nonallocatable component, ..."
10727 The pointer assignments are taken care of by the intrinsic
10728 assignment of the structure itself. This function recursively adds
10729 defined assignments where required. The recursion is accomplished
10730 by calling gfc_resolve_code.
10732 When the lhs in a defined assignment has intent INOUT, we need a
10733 temporary for the lhs. In pseudo-code:
10735 ! Only call function lhs once.
10736 if (lhs is not a constant or an variable)
10739 ! Do the intrinsic assignment
10741 ! Now do the defined assignments
10742 do over components with typebound defined assignment [%cmp]
10743 #if one component's assignment procedure is INOUT
10745 #if expr2 non-variable
10751 t1%cmp {defined=} expr2%cmp
10757 expr1%cmp {defined=} expr2%cmp
10761 /* The temporary assignments have to be put on top of the additional
10762 code to avoid the result being changed by the intrinsic assignment.
10764 static int component_assignment_level
= 0;
10765 static gfc_code
*tmp_head
= NULL
, *tmp_tail
= NULL
;
10768 generate_component_assignments (gfc_code
**code
, gfc_namespace
*ns
)
10770 gfc_component
*comp1
, *comp2
;
10771 gfc_code
*this_code
= NULL
, *head
= NULL
, *tail
= NULL
;
10773 int error_count
, depth
;
10775 gfc_get_errors (NULL
, &error_count
);
10777 /* Filter out continuing processing after an error. */
10779 || (*code
)->expr1
->ts
.type
!= BT_DERIVED
10780 || (*code
)->expr2
->ts
.type
!= BT_DERIVED
)
10783 /* TODO: Handle more than one part array reference in assignments. */
10784 depth
= nonscalar_typebound_assign ((*code
)->expr1
->ts
.u
.derived
,
10785 (*code
)->expr1
->rank
? 1 : 0);
10788 gfc_warning (0, "TODO: type-bound defined assignment(s) at %L not "
10789 "done because multiple part array references would "
10790 "occur in intermediate expressions.", &(*code
)->loc
);
10794 component_assignment_level
++;
10796 /* Create a temporary so that functions get called only once. */
10797 if ((*code
)->expr2
->expr_type
!= EXPR_VARIABLE
10798 && (*code
)->expr2
->expr_type
!= EXPR_CONSTANT
)
10800 gfc_expr
*tmp_expr
;
10802 /* Assign the rhs to the temporary. */
10803 tmp_expr
= get_temp_from_expr ((*code
)->expr1
, ns
);
10804 this_code
= build_assignment (EXEC_ASSIGN
,
10805 tmp_expr
, (*code
)->expr2
,
10806 NULL
, NULL
, (*code
)->loc
);
10807 /* Add the code and substitute the rhs expression. */
10808 add_code_to_chain (&this_code
, &tmp_head
, &tmp_tail
);
10809 gfc_free_expr ((*code
)->expr2
);
10810 (*code
)->expr2
= tmp_expr
;
10813 /* Do the intrinsic assignment. This is not needed if the lhs is one
10814 of the temporaries generated here, since the intrinsic assignment
10815 to the final result already does this. */
10816 if ((*code
)->expr1
->symtree
->n
.sym
->name
[2] != '@')
10818 this_code
= build_assignment (EXEC_ASSIGN
,
10819 (*code
)->expr1
, (*code
)->expr2
,
10820 NULL
, NULL
, (*code
)->loc
);
10821 add_code_to_chain (&this_code
, &head
, &tail
);
10824 comp1
= (*code
)->expr1
->ts
.u
.derived
->components
;
10825 comp2
= (*code
)->expr2
->ts
.u
.derived
->components
;
10828 for (; comp1
; comp1
= comp1
->next
, comp2
= comp2
->next
)
10830 bool inout
= false;
10832 /* The intrinsic assignment does the right thing for pointers
10833 of all kinds and allocatable components. */
10834 if (!gfc_bt_struct (comp1
->ts
.type
)
10835 || comp1
->attr
.pointer
10836 || comp1
->attr
.allocatable
10837 || comp1
->attr
.proc_pointer_comp
10838 || comp1
->attr
.class_pointer
10839 || comp1
->attr
.proc_pointer
)
10842 /* Make an assigment for this component. */
10843 this_code
= build_assignment (EXEC_ASSIGN
,
10844 (*code
)->expr1
, (*code
)->expr2
,
10845 comp1
, comp2
, (*code
)->loc
);
10847 /* Convert the assignment if there is a defined assignment for
10848 this type. Otherwise, using the call from gfc_resolve_code,
10849 recurse into its components. */
10850 gfc_resolve_code (this_code
, ns
);
10852 if (this_code
->op
== EXEC_ASSIGN_CALL
)
10854 gfc_formal_arglist
*dummy_args
;
10856 /* Check that there is a typebound defined assignment. If not,
10857 then this must be a module defined assignment. We cannot
10858 use the defined_assign_comp attribute here because it must
10859 be this derived type that has the defined assignment and not
10861 if (!(comp1
->ts
.u
.derived
->f2k_derived
10862 && comp1
->ts
.u
.derived
->f2k_derived
10863 ->tb_op
[INTRINSIC_ASSIGN
]))
10865 gfc_free_statements (this_code
);
10870 /* If the first argument of the subroutine has intent INOUT
10871 a temporary must be generated and used instead. */
10872 rsym
= this_code
->resolved_sym
;
10873 dummy_args
= gfc_sym_get_dummy_args (rsym
);
10875 && dummy_args
->sym
->attr
.intent
== INTENT_INOUT
)
10877 gfc_code
*temp_code
;
10880 /* Build the temporary required for the assignment and put
10881 it at the head of the generated code. */
10884 t1
= get_temp_from_expr ((*code
)->expr1
, ns
);
10885 temp_code
= build_assignment (EXEC_ASSIGN
,
10886 t1
, (*code
)->expr1
,
10887 NULL
, NULL
, (*code
)->loc
);
10889 /* For allocatable LHS, check whether it is allocated. Note
10890 that allocatable components with defined assignment are
10891 not yet support. See PR 57696. */
10892 if ((*code
)->expr1
->symtree
->n
.sym
->attr
.allocatable
)
10896 gfc_lval_expr_from_sym ((*code
)->expr1
->symtree
->n
.sym
);
10897 block
= gfc_get_code (EXEC_IF
);
10898 block
->block
= gfc_get_code (EXEC_IF
);
10899 block
->block
->expr1
10900 = gfc_build_intrinsic_call (ns
,
10901 GFC_ISYM_ALLOCATED
, "allocated",
10902 (*code
)->loc
, 1, e
);
10903 block
->block
->next
= temp_code
;
10906 add_code_to_chain (&temp_code
, &tmp_head
, &tmp_tail
);
10909 /* Replace the first actual arg with the component of the
10911 gfc_free_expr (this_code
->ext
.actual
->expr
);
10912 this_code
->ext
.actual
->expr
= gfc_copy_expr (t1
);
10913 add_comp_ref (this_code
->ext
.actual
->expr
, comp1
);
10915 /* If the LHS variable is allocatable and wasn't allocated and
10916 the temporary is allocatable, pointer assign the address of
10917 the freshly allocated LHS to the temporary. */
10918 if ((*code
)->expr1
->symtree
->n
.sym
->attr
.allocatable
10919 && gfc_expr_attr ((*code
)->expr1
).allocatable
)
10924 cond
= gfc_get_expr ();
10925 cond
->ts
.type
= BT_LOGICAL
;
10926 cond
->ts
.kind
= gfc_default_logical_kind
;
10927 cond
->expr_type
= EXPR_OP
;
10928 cond
->where
= (*code
)->loc
;
10929 cond
->value
.op
.op
= INTRINSIC_NOT
;
10930 cond
->value
.op
.op1
= gfc_build_intrinsic_call (ns
,
10931 GFC_ISYM_ALLOCATED
, "allocated",
10932 (*code
)->loc
, 1, gfc_copy_expr (t1
));
10933 block
= gfc_get_code (EXEC_IF
);
10934 block
->block
= gfc_get_code (EXEC_IF
);
10935 block
->block
->expr1
= cond
;
10936 block
->block
->next
= build_assignment (EXEC_POINTER_ASSIGN
,
10937 t1
, (*code
)->expr1
,
10938 NULL
, NULL
, (*code
)->loc
);
10939 add_code_to_chain (&block
, &head
, &tail
);
10943 else if (this_code
->op
== EXEC_ASSIGN
&& !this_code
->next
)
10945 /* Don't add intrinsic assignments since they are already
10946 effected by the intrinsic assignment of the structure. */
10947 gfc_free_statements (this_code
);
10952 add_code_to_chain (&this_code
, &head
, &tail
);
10956 /* Transfer the value to the final result. */
10957 this_code
= build_assignment (EXEC_ASSIGN
,
10958 (*code
)->expr1
, t1
,
10959 comp1
, comp2
, (*code
)->loc
);
10960 add_code_to_chain (&this_code
, &head
, &tail
);
10964 /* Put the temporary assignments at the top of the generated code. */
10965 if (tmp_head
&& component_assignment_level
== 1)
10967 gfc_append_code (tmp_head
, head
);
10969 tmp_head
= tmp_tail
= NULL
;
10972 // If we did a pointer assignment - thus, we need to ensure that the LHS is
10973 // not accidentally deallocated. Hence, nullify t1.
10974 if (t1
&& (*code
)->expr1
->symtree
->n
.sym
->attr
.allocatable
10975 && gfc_expr_attr ((*code
)->expr1
).allocatable
)
10981 e
= gfc_lval_expr_from_sym ((*code
)->expr1
->symtree
->n
.sym
);
10982 cond
= gfc_build_intrinsic_call (ns
, GFC_ISYM_ASSOCIATED
, "associated",
10983 (*code
)->loc
, 2, gfc_copy_expr (t1
), e
);
10984 block
= gfc_get_code (EXEC_IF
);
10985 block
->block
= gfc_get_code (EXEC_IF
);
10986 block
->block
->expr1
= cond
;
10987 block
->block
->next
= build_assignment (EXEC_POINTER_ASSIGN
,
10988 t1
, gfc_get_null_expr (&(*code
)->loc
),
10989 NULL
, NULL
, (*code
)->loc
);
10990 gfc_append_code (tail
, block
);
10994 /* Now attach the remaining code chain to the input code. Step on
10995 to the end of the new code since resolution is complete. */
10996 gcc_assert ((*code
)->op
== EXEC_ASSIGN
);
10997 tail
->next
= (*code
)->next
;
10998 /* Overwrite 'code' because this would place the intrinsic assignment
10999 before the temporary for the lhs is created. */
11000 gfc_free_expr ((*code
)->expr1
);
11001 gfc_free_expr ((*code
)->expr2
);
11007 component_assignment_level
--;
11011 /* F2008: Pointer function assignments are of the form:
11012 ptr_fcn (args) = expr
11013 This function breaks these assignments into two statements:
11014 temporary_pointer => ptr_fcn(args)
11015 temporary_pointer = expr */
11018 resolve_ptr_fcn_assign (gfc_code
**code
, gfc_namespace
*ns
)
11020 gfc_expr
*tmp_ptr_expr
;
11021 gfc_code
*this_code
;
11022 gfc_component
*comp
;
11025 if ((*code
)->expr1
->expr_type
!= EXPR_FUNCTION
)
11028 /* Even if standard does not support this feature, continue to build
11029 the two statements to avoid upsetting frontend_passes.c. */
11030 gfc_notify_std (GFC_STD_F2008
, "Pointer procedure assignment at "
11031 "%L", &(*code
)->loc
);
11033 comp
= gfc_get_proc_ptr_comp ((*code
)->expr1
);
11036 s
= comp
->ts
.interface
;
11038 s
= (*code
)->expr1
->symtree
->n
.sym
;
11040 if (s
== NULL
|| !s
->result
->attr
.pointer
)
11042 gfc_error ("The function result on the lhs of the assignment at "
11043 "%L must have the pointer attribute.",
11044 &(*code
)->expr1
->where
);
11045 (*code
)->op
= EXEC_NOP
;
11049 tmp_ptr_expr
= get_temp_from_expr ((*code
)->expr2
, ns
);
11051 /* get_temp_from_expression is set up for ordinary assignments. To that
11052 end, where array bounds are not known, arrays are made allocatable.
11053 Change the temporary to a pointer here. */
11054 tmp_ptr_expr
->symtree
->n
.sym
->attr
.pointer
= 1;
11055 tmp_ptr_expr
->symtree
->n
.sym
->attr
.allocatable
= 0;
11056 tmp_ptr_expr
->where
= (*code
)->loc
;
11058 this_code
= build_assignment (EXEC_ASSIGN
,
11059 tmp_ptr_expr
, (*code
)->expr2
,
11060 NULL
, NULL
, (*code
)->loc
);
11061 this_code
->next
= (*code
)->next
;
11062 (*code
)->next
= this_code
;
11063 (*code
)->op
= EXEC_POINTER_ASSIGN
;
11064 (*code
)->expr2
= (*code
)->expr1
;
11065 (*code
)->expr1
= tmp_ptr_expr
;
11071 /* Deferred character length assignments from an operator expression
11072 require a temporary because the character length of the lhs can
11073 change in the course of the assignment. */
11076 deferred_op_assign (gfc_code
**code
, gfc_namespace
*ns
)
11078 gfc_expr
*tmp_expr
;
11079 gfc_code
*this_code
;
11081 if (!((*code
)->expr1
->ts
.type
== BT_CHARACTER
11082 && (*code
)->expr1
->ts
.deferred
&& (*code
)->expr1
->rank
11083 && (*code
)->expr2
->expr_type
== EXPR_OP
))
11086 if (!gfc_check_dependency ((*code
)->expr1
, (*code
)->expr2
, 1))
11089 tmp_expr
= get_temp_from_expr ((*code
)->expr1
, ns
);
11090 tmp_expr
->where
= (*code
)->loc
;
11092 /* A new charlen is required to ensure that the variable string
11093 length is different to that of the original lhs. */
11094 tmp_expr
->ts
.u
.cl
= gfc_get_charlen();
11095 tmp_expr
->symtree
->n
.sym
->ts
.u
.cl
= tmp_expr
->ts
.u
.cl
;
11096 tmp_expr
->ts
.u
.cl
->next
= (*code
)->expr2
->ts
.u
.cl
->next
;
11097 (*code
)->expr2
->ts
.u
.cl
->next
= tmp_expr
->ts
.u
.cl
;
11099 tmp_expr
->symtree
->n
.sym
->ts
.deferred
= 1;
11101 this_code
= build_assignment (EXEC_ASSIGN
,
11103 gfc_copy_expr (tmp_expr
),
11104 NULL
, NULL
, (*code
)->loc
);
11106 (*code
)->expr1
= tmp_expr
;
11108 this_code
->next
= (*code
)->next
;
11109 (*code
)->next
= this_code
;
11115 /* Given a block of code, recursively resolve everything pointed to by this
11119 gfc_resolve_code (gfc_code
*code
, gfc_namespace
*ns
)
11121 int omp_workshare_save
;
11122 int forall_save
, do_concurrent_save
;
11126 frame
.prev
= cs_base
;
11130 find_reachable_labels (code
);
11132 for (; code
; code
= code
->next
)
11134 frame
.current
= code
;
11135 forall_save
= forall_flag
;
11136 do_concurrent_save
= gfc_do_concurrent_flag
;
11138 if (code
->op
== EXEC_FORALL
)
11141 gfc_resolve_forall (code
, ns
, forall_save
);
11144 else if (code
->block
)
11146 omp_workshare_save
= -1;
11149 case EXEC_OACC_PARALLEL_LOOP
:
11150 case EXEC_OACC_PARALLEL
:
11151 case EXEC_OACC_KERNELS_LOOP
:
11152 case EXEC_OACC_KERNELS
:
11153 case EXEC_OACC_DATA
:
11154 case EXEC_OACC_HOST_DATA
:
11155 case EXEC_OACC_LOOP
:
11156 gfc_resolve_oacc_blocks (code
, ns
);
11158 case EXEC_OMP_PARALLEL_WORKSHARE
:
11159 omp_workshare_save
= omp_workshare_flag
;
11160 omp_workshare_flag
= 1;
11161 gfc_resolve_omp_parallel_blocks (code
, ns
);
11163 case EXEC_OMP_PARALLEL
:
11164 case EXEC_OMP_PARALLEL_DO
:
11165 case EXEC_OMP_PARALLEL_DO_SIMD
:
11166 case EXEC_OMP_PARALLEL_SECTIONS
:
11167 case EXEC_OMP_TARGET_PARALLEL
:
11168 case EXEC_OMP_TARGET_PARALLEL_DO
:
11169 case EXEC_OMP_TARGET_PARALLEL_DO_SIMD
:
11170 case EXEC_OMP_TARGET_TEAMS
:
11171 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE
:
11172 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO
:
11173 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
11174 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_SIMD
:
11175 case EXEC_OMP_TASK
:
11176 case EXEC_OMP_TASKLOOP
:
11177 case EXEC_OMP_TASKLOOP_SIMD
:
11178 case EXEC_OMP_TEAMS
:
11179 case EXEC_OMP_TEAMS_DISTRIBUTE
:
11180 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO
:
11181 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
11182 case EXEC_OMP_TEAMS_DISTRIBUTE_SIMD
:
11183 omp_workshare_save
= omp_workshare_flag
;
11184 omp_workshare_flag
= 0;
11185 gfc_resolve_omp_parallel_blocks (code
, ns
);
11187 case EXEC_OMP_DISTRIBUTE
:
11188 case EXEC_OMP_DISTRIBUTE_SIMD
:
11190 case EXEC_OMP_DO_SIMD
:
11191 case EXEC_OMP_SIMD
:
11192 case EXEC_OMP_TARGET_SIMD
:
11193 gfc_resolve_omp_do_blocks (code
, ns
);
11195 case EXEC_SELECT_TYPE
:
11196 /* Blocks are handled in resolve_select_type because we have
11197 to transform the SELECT TYPE into ASSOCIATE first. */
11199 case EXEC_DO_CONCURRENT
:
11200 gfc_do_concurrent_flag
= 1;
11201 gfc_resolve_blocks (code
->block
, ns
);
11202 gfc_do_concurrent_flag
= 2;
11204 case EXEC_OMP_WORKSHARE
:
11205 omp_workshare_save
= omp_workshare_flag
;
11206 omp_workshare_flag
= 1;
11209 gfc_resolve_blocks (code
->block
, ns
);
11213 if (omp_workshare_save
!= -1)
11214 omp_workshare_flag
= omp_workshare_save
;
11218 if (code
->op
!= EXEC_COMPCALL
&& code
->op
!= EXEC_CALL_PPC
)
11219 t
= gfc_resolve_expr (code
->expr1
);
11220 forall_flag
= forall_save
;
11221 gfc_do_concurrent_flag
= do_concurrent_save
;
11223 if (!gfc_resolve_expr (code
->expr2
))
11226 if (code
->op
== EXEC_ALLOCATE
11227 && !gfc_resolve_expr (code
->expr3
))
11233 case EXEC_END_BLOCK
:
11234 case EXEC_END_NESTED_BLOCK
:
11238 case EXEC_ERROR_STOP
:
11240 case EXEC_CONTINUE
:
11242 case EXEC_ASSIGN_CALL
:
11245 case EXEC_CRITICAL
:
11246 resolve_critical (code
);
11249 case EXEC_SYNC_ALL
:
11250 case EXEC_SYNC_IMAGES
:
11251 case EXEC_SYNC_MEMORY
:
11252 resolve_sync (code
);
11257 case EXEC_EVENT_POST
:
11258 case EXEC_EVENT_WAIT
:
11259 resolve_lock_unlock_event (code
);
11262 case EXEC_FAIL_IMAGE
:
11263 case EXEC_FORM_TEAM
:
11264 case EXEC_CHANGE_TEAM
:
11265 case EXEC_END_TEAM
:
11266 case EXEC_SYNC_TEAM
:
11270 /* Keep track of which entry we are up to. */
11271 current_entry_id
= code
->ext
.entry
->id
;
11275 resolve_where (code
, NULL
);
11279 if (code
->expr1
!= NULL
)
11281 if (code
->expr1
->ts
.type
!= BT_INTEGER
)
11282 gfc_error ("ASSIGNED GOTO statement at %L requires an "
11283 "INTEGER variable", &code
->expr1
->where
);
11284 else if (code
->expr1
->symtree
->n
.sym
->attr
.assign
!= 1)
11285 gfc_error ("Variable %qs has not been assigned a target "
11286 "label at %L", code
->expr1
->symtree
->n
.sym
->name
,
11287 &code
->expr1
->where
);
11290 resolve_branch (code
->label1
, code
);
11294 if (code
->expr1
!= NULL
11295 && (code
->expr1
->ts
.type
!= BT_INTEGER
|| code
->expr1
->rank
))
11296 gfc_error ("Alternate RETURN statement at %L requires a SCALAR-"
11297 "INTEGER return specifier", &code
->expr1
->where
);
11300 case EXEC_INIT_ASSIGN
:
11301 case EXEC_END_PROCEDURE
:
11308 /* Remove a GFC_ISYM_CAF_GET inserted for a coindexed variable on
11310 if (code
->expr1
->expr_type
== EXPR_FUNCTION
11311 && code
->expr1
->value
.function
.isym
11312 && code
->expr1
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
)
11313 remove_caf_get_intrinsic (code
->expr1
);
11315 /* If this is a pointer function in an lvalue variable context,
11316 the new code will have to be resolved afresh. This is also the
11317 case with an error, where the code is transformed into NOP to
11318 prevent ICEs downstream. */
11319 if (resolve_ptr_fcn_assign (&code
, ns
)
11320 || code
->op
== EXEC_NOP
)
11323 if (!gfc_check_vardef_context (code
->expr1
, false, false, false,
11327 if (resolve_ordinary_assign (code
, ns
))
11329 if (code
->op
== EXEC_COMPCALL
)
11335 /* Check for dependencies in deferred character length array
11336 assignments and generate a temporary, if necessary. */
11337 if (code
->op
== EXEC_ASSIGN
&& deferred_op_assign (&code
, ns
))
11340 /* F03 7.4.1.3 for non-allocatable, non-pointer components. */
11341 if (code
->op
!= EXEC_CALL
&& code
->expr1
->ts
.type
== BT_DERIVED
11342 && code
->expr1
->ts
.u
.derived
11343 && code
->expr1
->ts
.u
.derived
->attr
.defined_assign_comp
)
11344 generate_component_assignments (&code
, ns
);
11348 case EXEC_LABEL_ASSIGN
:
11349 if (code
->label1
->defined
== ST_LABEL_UNKNOWN
)
11350 gfc_error ("Label %d referenced at %L is never defined",
11351 code
->label1
->value
, &code
->label1
->where
);
11353 && (code
->expr1
->expr_type
!= EXPR_VARIABLE
11354 || code
->expr1
->symtree
->n
.sym
->ts
.type
!= BT_INTEGER
11355 || code
->expr1
->symtree
->n
.sym
->ts
.kind
11356 != gfc_default_integer_kind
11357 || code
->expr1
->symtree
->n
.sym
->as
!= NULL
))
11358 gfc_error ("ASSIGN statement at %L requires a scalar "
11359 "default INTEGER variable", &code
->expr1
->where
);
11362 case EXEC_POINTER_ASSIGN
:
11369 /* This is both a variable definition and pointer assignment
11370 context, so check both of them. For rank remapping, a final
11371 array ref may be present on the LHS and fool gfc_expr_attr
11372 used in gfc_check_vardef_context. Remove it. */
11373 e
= remove_last_array_ref (code
->expr1
);
11374 t
= gfc_check_vardef_context (e
, true, false, false,
11375 _("pointer assignment"));
11377 t
= gfc_check_vardef_context (e
, false, false, false,
11378 _("pointer assignment"));
11383 gfc_check_pointer_assign (code
->expr1
, code
->expr2
);
11385 /* Assigning a class object always is a regular assign. */
11386 if (code
->expr2
->ts
.type
== BT_CLASS
11387 && code
->expr1
->ts
.type
== BT_CLASS
11388 && !CLASS_DATA (code
->expr2
)->attr
.dimension
11389 && !(gfc_expr_attr (code
->expr1
).proc_pointer
11390 && code
->expr2
->expr_type
== EXPR_VARIABLE
11391 && code
->expr2
->symtree
->n
.sym
->attr
.flavor
11393 code
->op
= EXEC_ASSIGN
;
11397 case EXEC_ARITHMETIC_IF
:
11399 gfc_expr
*e
= code
->expr1
;
11401 gfc_resolve_expr (e
);
11402 if (e
->expr_type
== EXPR_NULL
)
11403 gfc_error ("Invalid NULL at %L", &e
->where
);
11405 if (t
&& (e
->rank
> 0
11406 || !(e
->ts
.type
== BT_REAL
|| e
->ts
.type
== BT_INTEGER
)))
11407 gfc_error ("Arithmetic IF statement at %L requires a scalar "
11408 "REAL or INTEGER expression", &e
->where
);
11410 resolve_branch (code
->label1
, code
);
11411 resolve_branch (code
->label2
, code
);
11412 resolve_branch (code
->label3
, code
);
11417 if (t
&& code
->expr1
!= NULL
11418 && (code
->expr1
->ts
.type
!= BT_LOGICAL
11419 || code
->expr1
->rank
!= 0))
11420 gfc_error ("IF clause at %L requires a scalar LOGICAL expression",
11421 &code
->expr1
->where
);
11426 resolve_call (code
);
11429 case EXEC_COMPCALL
:
11431 resolve_typebound_subroutine (code
);
11434 case EXEC_CALL_PPC
:
11435 resolve_ppc_call (code
);
11439 /* Select is complicated. Also, a SELECT construct could be
11440 a transformed computed GOTO. */
11441 resolve_select (code
, false);
11444 case EXEC_SELECT_TYPE
:
11445 resolve_select_type (code
, ns
);
11449 resolve_block_construct (code
);
11453 if (code
->ext
.iterator
!= NULL
)
11455 gfc_iterator
*iter
= code
->ext
.iterator
;
11456 if (gfc_resolve_iterator (iter
, true, false))
11457 gfc_resolve_do_iterator (code
, iter
->var
->symtree
->n
.sym
,
11462 case EXEC_DO_WHILE
:
11463 if (code
->expr1
== NULL
)
11464 gfc_internal_error ("gfc_resolve_code(): No expression on "
11467 && (code
->expr1
->rank
!= 0
11468 || code
->expr1
->ts
.type
!= BT_LOGICAL
))
11469 gfc_error ("Exit condition of DO WHILE loop at %L must be "
11470 "a scalar LOGICAL expression", &code
->expr1
->where
);
11473 case EXEC_ALLOCATE
:
11475 resolve_allocate_deallocate (code
, "ALLOCATE");
11479 case EXEC_DEALLOCATE
:
11481 resolve_allocate_deallocate (code
, "DEALLOCATE");
11486 if (!gfc_resolve_open (code
->ext
.open
))
11489 resolve_branch (code
->ext
.open
->err
, code
);
11493 if (!gfc_resolve_close (code
->ext
.close
))
11496 resolve_branch (code
->ext
.close
->err
, code
);
11499 case EXEC_BACKSPACE
:
11503 if (!gfc_resolve_filepos (code
->ext
.filepos
))
11506 resolve_branch (code
->ext
.filepos
->err
, code
);
11510 if (!gfc_resolve_inquire (code
->ext
.inquire
))
11513 resolve_branch (code
->ext
.inquire
->err
, code
);
11516 case EXEC_IOLENGTH
:
11517 gcc_assert (code
->ext
.inquire
!= NULL
);
11518 if (!gfc_resolve_inquire (code
->ext
.inquire
))
11521 resolve_branch (code
->ext
.inquire
->err
, code
);
11525 if (!gfc_resolve_wait (code
->ext
.wait
))
11528 resolve_branch (code
->ext
.wait
->err
, code
);
11529 resolve_branch (code
->ext
.wait
->end
, code
);
11530 resolve_branch (code
->ext
.wait
->eor
, code
);
11535 if (!gfc_resolve_dt (code
->ext
.dt
, &code
->loc
))
11538 resolve_branch (code
->ext
.dt
->err
, code
);
11539 resolve_branch (code
->ext
.dt
->end
, code
);
11540 resolve_branch (code
->ext
.dt
->eor
, code
);
11543 case EXEC_TRANSFER
:
11544 resolve_transfer (code
);
11547 case EXEC_DO_CONCURRENT
:
11549 resolve_forall_iterators (code
->ext
.forall_iterator
);
11551 if (code
->expr1
!= NULL
11552 && (code
->expr1
->ts
.type
!= BT_LOGICAL
|| code
->expr1
->rank
))
11553 gfc_error ("FORALL mask clause at %L requires a scalar LOGICAL "
11554 "expression", &code
->expr1
->where
);
11557 case EXEC_OACC_PARALLEL_LOOP
:
11558 case EXEC_OACC_PARALLEL
:
11559 case EXEC_OACC_KERNELS_LOOP
:
11560 case EXEC_OACC_KERNELS
:
11561 case EXEC_OACC_DATA
:
11562 case EXEC_OACC_HOST_DATA
:
11563 case EXEC_OACC_LOOP
:
11564 case EXEC_OACC_UPDATE
:
11565 case EXEC_OACC_WAIT
:
11566 case EXEC_OACC_CACHE
:
11567 case EXEC_OACC_ENTER_DATA
:
11568 case EXEC_OACC_EXIT_DATA
:
11569 case EXEC_OACC_ATOMIC
:
11570 case EXEC_OACC_DECLARE
:
11571 gfc_resolve_oacc_directive (code
, ns
);
11574 case EXEC_OMP_ATOMIC
:
11575 case EXEC_OMP_BARRIER
:
11576 case EXEC_OMP_CANCEL
:
11577 case EXEC_OMP_CANCELLATION_POINT
:
11578 case EXEC_OMP_CRITICAL
:
11579 case EXEC_OMP_FLUSH
:
11580 case EXEC_OMP_DISTRIBUTE
:
11581 case EXEC_OMP_DISTRIBUTE_PARALLEL_DO
:
11582 case EXEC_OMP_DISTRIBUTE_PARALLEL_DO_SIMD
:
11583 case EXEC_OMP_DISTRIBUTE_SIMD
:
11585 case EXEC_OMP_DO_SIMD
:
11586 case EXEC_OMP_MASTER
:
11587 case EXEC_OMP_ORDERED
:
11588 case EXEC_OMP_SECTIONS
:
11589 case EXEC_OMP_SIMD
:
11590 case EXEC_OMP_SINGLE
:
11591 case EXEC_OMP_TARGET
:
11592 case EXEC_OMP_TARGET_DATA
:
11593 case EXEC_OMP_TARGET_ENTER_DATA
:
11594 case EXEC_OMP_TARGET_EXIT_DATA
:
11595 case EXEC_OMP_TARGET_PARALLEL
:
11596 case EXEC_OMP_TARGET_PARALLEL_DO
:
11597 case EXEC_OMP_TARGET_PARALLEL_DO_SIMD
:
11598 case EXEC_OMP_TARGET_SIMD
:
11599 case EXEC_OMP_TARGET_TEAMS
:
11600 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE
:
11601 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO
:
11602 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
11603 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_SIMD
:
11604 case EXEC_OMP_TARGET_UPDATE
:
11605 case EXEC_OMP_TASK
:
11606 case EXEC_OMP_TASKGROUP
:
11607 case EXEC_OMP_TASKLOOP
:
11608 case EXEC_OMP_TASKLOOP_SIMD
:
11609 case EXEC_OMP_TASKWAIT
:
11610 case EXEC_OMP_TASKYIELD
:
11611 case EXEC_OMP_TEAMS
:
11612 case EXEC_OMP_TEAMS_DISTRIBUTE
:
11613 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO
:
11614 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
11615 case EXEC_OMP_TEAMS_DISTRIBUTE_SIMD
:
11616 case EXEC_OMP_WORKSHARE
:
11617 gfc_resolve_omp_directive (code
, ns
);
11620 case EXEC_OMP_PARALLEL
:
11621 case EXEC_OMP_PARALLEL_DO
:
11622 case EXEC_OMP_PARALLEL_DO_SIMD
:
11623 case EXEC_OMP_PARALLEL_SECTIONS
:
11624 case EXEC_OMP_PARALLEL_WORKSHARE
:
11625 omp_workshare_save
= omp_workshare_flag
;
11626 omp_workshare_flag
= 0;
11627 gfc_resolve_omp_directive (code
, ns
);
11628 omp_workshare_flag
= omp_workshare_save
;
11632 gfc_internal_error ("gfc_resolve_code(): Bad statement code");
11636 cs_base
= frame
.prev
;
11640 /* Resolve initial values and make sure they are compatible with
11644 resolve_values (gfc_symbol
*sym
)
11648 if (sym
->value
== NULL
)
11651 if (sym
->value
->expr_type
== EXPR_STRUCTURE
)
11652 t
= resolve_structure_cons (sym
->value
, 1);
11654 t
= gfc_resolve_expr (sym
->value
);
11659 gfc_check_assign_symbol (sym
, NULL
, sym
->value
);
11663 /* Verify any BIND(C) derived types in the namespace so we can report errors
11664 for them once, rather than for each variable declared of that type. */
11667 resolve_bind_c_derived_types (gfc_symbol
*derived_sym
)
11669 if (derived_sym
!= NULL
&& derived_sym
->attr
.flavor
== FL_DERIVED
11670 && derived_sym
->attr
.is_bind_c
== 1)
11671 verify_bind_c_derived_type (derived_sym
);
11677 /* Check the interfaces of DTIO procedures associated with derived
11678 type 'sym'. These procedures can either have typebound bindings or
11679 can appear in DTIO generic interfaces. */
11682 gfc_verify_DTIO_procedures (gfc_symbol
*sym
)
11684 if (!sym
|| sym
->attr
.flavor
!= FL_DERIVED
)
11687 gfc_check_dtio_interfaces (sym
);
11692 /* Verify that any binding labels used in a given namespace do not collide
11693 with the names or binding labels of any global symbols. Multiple INTERFACE
11694 for the same procedure are permitted. */
11697 gfc_verify_binding_labels (gfc_symbol
*sym
)
11700 const char *module
;
11702 if (!sym
|| !sym
->attr
.is_bind_c
|| sym
->attr
.is_iso_c
11703 || sym
->attr
.flavor
== FL_DERIVED
|| !sym
->binding_label
)
11706 gsym
= gfc_find_case_gsymbol (gfc_gsym_root
, sym
->binding_label
);
11709 module
= sym
->module
;
11710 else if (sym
->ns
&& sym
->ns
->proc_name
11711 && sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
)
11712 module
= sym
->ns
->proc_name
->name
;
11713 else if (sym
->ns
&& sym
->ns
->parent
11714 && sym
->ns
&& sym
->ns
->parent
->proc_name
11715 && sym
->ns
->parent
->proc_name
->attr
.flavor
== FL_MODULE
)
11716 module
= sym
->ns
->parent
->proc_name
->name
;
11722 && (gsym
->type
== GSYM_FUNCTION
|| gsym
->type
== GSYM_SUBROUTINE
)))
11725 gsym
= gfc_get_gsymbol (sym
->binding_label
);
11726 gsym
->where
= sym
->declared_at
;
11727 gsym
->sym_name
= sym
->name
;
11728 gsym
->binding_label
= sym
->binding_label
;
11729 gsym
->ns
= sym
->ns
;
11730 gsym
->mod_name
= module
;
11731 if (sym
->attr
.function
)
11732 gsym
->type
= GSYM_FUNCTION
;
11733 else if (sym
->attr
.subroutine
)
11734 gsym
->type
= GSYM_SUBROUTINE
;
11735 /* Mark as variable/procedure as defined, unless its an INTERFACE. */
11736 gsym
->defined
= sym
->attr
.if_source
!= IFSRC_IFBODY
;
11740 if (sym
->attr
.flavor
== FL_VARIABLE
&& gsym
->type
!= GSYM_UNKNOWN
)
11742 gfc_error ("Variable %qs with binding label %qs at %L uses the same global "
11743 "identifier as entity at %L", sym
->name
,
11744 sym
->binding_label
, &sym
->declared_at
, &gsym
->where
);
11745 /* Clear the binding label to prevent checking multiple times. */
11746 sym
->binding_label
= NULL
;
11749 else if (sym
->attr
.flavor
== FL_VARIABLE
&& module
11750 && (strcmp (module
, gsym
->mod_name
) != 0
11751 || strcmp (sym
->name
, gsym
->sym_name
) != 0))
11753 /* This can only happen if the variable is defined in a module - if it
11754 isn't the same module, reject it. */
11755 gfc_error ("Variable %qs from module %qs with binding label %qs at %L "
11756 "uses the same global identifier as entity at %L from module %qs",
11757 sym
->name
, module
, sym
->binding_label
,
11758 &sym
->declared_at
, &gsym
->where
, gsym
->mod_name
);
11759 sym
->binding_label
= NULL
;
11761 else if ((sym
->attr
.function
|| sym
->attr
.subroutine
)
11762 && ((gsym
->type
!= GSYM_SUBROUTINE
&& gsym
->type
!= GSYM_FUNCTION
)
11763 || (gsym
->defined
&& sym
->attr
.if_source
!= IFSRC_IFBODY
))
11764 && sym
!= gsym
->ns
->proc_name
11765 && (module
!= gsym
->mod_name
11766 || strcmp (gsym
->sym_name
, sym
->name
) != 0
11767 || (module
&& strcmp (module
, gsym
->mod_name
) != 0)))
11769 /* Print an error if the procedure is defined multiple times; we have to
11770 exclude references to the same procedure via module association or
11771 multiple checks for the same procedure. */
11772 gfc_error ("Procedure %qs with binding label %qs at %L uses the same "
11773 "global identifier as entity at %L", sym
->name
,
11774 sym
->binding_label
, &sym
->declared_at
, &gsym
->where
);
11775 sym
->binding_label
= NULL
;
11780 /* Resolve an index expression. */
11783 resolve_index_expr (gfc_expr
*e
)
11785 if (!gfc_resolve_expr (e
))
11788 if (!gfc_simplify_expr (e
, 0))
11791 if (!gfc_specification_expr (e
))
11798 /* Resolve a charlen structure. */
11801 resolve_charlen (gfc_charlen
*cl
)
11804 bool saved_specification_expr
;
11810 saved_specification_expr
= specification_expr
;
11811 specification_expr
= true;
11813 if (cl
->length_from_typespec
)
11815 if (!gfc_resolve_expr (cl
->length
))
11817 specification_expr
= saved_specification_expr
;
11821 if (!gfc_simplify_expr (cl
->length
, 0))
11823 specification_expr
= saved_specification_expr
;
11827 /* cl->length has been resolved. It should have an integer type. */
11828 if (cl
->length
->ts
.type
!= BT_INTEGER
)
11830 gfc_error ("Scalar INTEGER expression expected at %L",
11831 &cl
->length
->where
);
11837 if (!resolve_index_expr (cl
->length
))
11839 specification_expr
= saved_specification_expr
;
11844 /* F2008, 4.4.3.2: If the character length parameter value evaluates to
11845 a negative value, the length of character entities declared is zero. */
11846 if (cl
->length
&& cl
->length
->expr_type
== EXPR_CONSTANT
11847 && mpz_sgn (cl
->length
->value
.integer
) < 0)
11848 gfc_replace_expr (cl
->length
,
11849 gfc_get_int_expr (gfc_charlen_int_kind
, NULL
, 0));
11851 /* Check that the character length is not too large. */
11852 k
= gfc_validate_kind (BT_INTEGER
, gfc_charlen_int_kind
, false);
11853 if (cl
->length
&& cl
->length
->expr_type
== EXPR_CONSTANT
11854 && cl
->length
->ts
.type
== BT_INTEGER
11855 && mpz_cmp (cl
->length
->value
.integer
, gfc_integer_kinds
[k
].huge
) > 0)
11857 gfc_error ("String length at %L is too large", &cl
->length
->where
);
11858 specification_expr
= saved_specification_expr
;
11862 specification_expr
= saved_specification_expr
;
11867 /* Test for non-constant shape arrays. */
11870 is_non_constant_shape_array (gfc_symbol
*sym
)
11876 not_constant
= false;
11877 if (sym
->as
!= NULL
)
11879 /* Unfortunately, !gfc_is_compile_time_shape hits a legal case that
11880 has not been simplified; parameter array references. Do the
11881 simplification now. */
11882 for (i
= 0; i
< sym
->as
->rank
+ sym
->as
->corank
; i
++)
11884 e
= sym
->as
->lower
[i
];
11885 if (e
&& (!resolve_index_expr(e
)
11886 || !gfc_is_constant_expr (e
)))
11887 not_constant
= true;
11888 e
= sym
->as
->upper
[i
];
11889 if (e
&& (!resolve_index_expr(e
)
11890 || !gfc_is_constant_expr (e
)))
11891 not_constant
= true;
11894 return not_constant
;
11897 /* Given a symbol and an initialization expression, add code to initialize
11898 the symbol to the function entry. */
11900 build_init_assign (gfc_symbol
*sym
, gfc_expr
*init
)
11904 gfc_namespace
*ns
= sym
->ns
;
11906 /* Search for the function namespace if this is a contained
11907 function without an explicit result. */
11908 if (sym
->attr
.function
&& sym
== sym
->result
11909 && sym
->name
!= sym
->ns
->proc_name
->name
)
11911 ns
= ns
->contained
;
11912 for (;ns
; ns
= ns
->sibling
)
11913 if (strcmp (ns
->proc_name
->name
, sym
->name
) == 0)
11919 gfc_free_expr (init
);
11923 /* Build an l-value expression for the result. */
11924 lval
= gfc_lval_expr_from_sym (sym
);
11926 /* Add the code at scope entry. */
11927 init_st
= gfc_get_code (EXEC_INIT_ASSIGN
);
11928 init_st
->next
= ns
->code
;
11929 ns
->code
= init_st
;
11931 /* Assign the default initializer to the l-value. */
11932 init_st
->loc
= sym
->declared_at
;
11933 init_st
->expr1
= lval
;
11934 init_st
->expr2
= init
;
11938 /* Whether or not we can generate a default initializer for a symbol. */
11941 can_generate_init (gfc_symbol
*sym
)
11943 symbol_attribute
*a
;
11948 /* These symbols should never have a default initialization. */
11953 || (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
)
11954 && (CLASS_DATA (sym
)->attr
.class_pointer
11955 || CLASS_DATA (sym
)->attr
.proc_pointer
))
11956 || a
->in_equivalence
11963 || (!a
->referenced
&& !a
->result
)
11964 || (a
->dummy
&& a
->intent
!= INTENT_OUT
)
11965 || (a
->function
&& sym
!= sym
->result
)
11970 /* Assign the default initializer to a derived type variable or result. */
11973 apply_default_init (gfc_symbol
*sym
)
11975 gfc_expr
*init
= NULL
;
11977 if (sym
->attr
.flavor
!= FL_VARIABLE
&& !sym
->attr
.function
)
11980 if (sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
)
11981 init
= gfc_generate_initializer (&sym
->ts
, can_generate_init (sym
));
11983 if (init
== NULL
&& sym
->ts
.type
!= BT_CLASS
)
11986 build_init_assign (sym
, init
);
11987 sym
->attr
.referenced
= 1;
11991 /* Build an initializer for a local. Returns null if the symbol should not have
11992 a default initialization. */
11995 build_default_init_expr (gfc_symbol
*sym
)
11997 /* These symbols should never have a default initialization. */
11998 if (sym
->attr
.allocatable
11999 || sym
->attr
.external
12001 || sym
->attr
.pointer
12002 || sym
->attr
.in_equivalence
12003 || sym
->attr
.in_common
12006 || sym
->attr
.cray_pointee
12007 || sym
->attr
.cray_pointer
12011 /* Get the appropriate init expression. */
12012 return gfc_build_default_init_expr (&sym
->ts
, &sym
->declared_at
);
12015 /* Add an initialization expression to a local variable. */
12017 apply_default_init_local (gfc_symbol
*sym
)
12019 gfc_expr
*init
= NULL
;
12021 /* The symbol should be a variable or a function return value. */
12022 if ((sym
->attr
.flavor
!= FL_VARIABLE
&& !sym
->attr
.function
)
12023 || (sym
->attr
.function
&& sym
->result
!= sym
))
12026 /* Try to build the initializer expression. If we can't initialize
12027 this symbol, then init will be NULL. */
12028 init
= build_default_init_expr (sym
);
12032 /* For saved variables, we don't want to add an initializer at function
12033 entry, so we just add a static initializer. Note that automatic variables
12034 are stack allocated even with -fno-automatic; we have also to exclude
12035 result variable, which are also nonstatic. */
12036 if (!sym
->attr
.automatic
12037 && (sym
->attr
.save
|| sym
->ns
->save_all
12038 || (flag_max_stack_var_size
== 0 && !sym
->attr
.result
12039 && (sym
->ns
->proc_name
&& !sym
->ns
->proc_name
->attr
.recursive
)
12040 && (!sym
->attr
.dimension
|| !is_non_constant_shape_array (sym
)))))
12042 /* Don't clobber an existing initializer! */
12043 gcc_assert (sym
->value
== NULL
);
12048 build_init_assign (sym
, init
);
12052 /* Resolution of common features of flavors variable and procedure. */
12055 resolve_fl_var_and_proc (gfc_symbol
*sym
, int mp_flag
)
12057 gfc_array_spec
*as
;
12059 if (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
)
12060 as
= CLASS_DATA (sym
)->as
;
12064 /* Constraints on deferred shape variable. */
12065 if (as
== NULL
|| as
->type
!= AS_DEFERRED
)
12067 bool pointer
, allocatable
, dimension
;
12069 if (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
)
12071 pointer
= CLASS_DATA (sym
)->attr
.class_pointer
;
12072 allocatable
= CLASS_DATA (sym
)->attr
.allocatable
;
12073 dimension
= CLASS_DATA (sym
)->attr
.dimension
;
12077 pointer
= sym
->attr
.pointer
&& !sym
->attr
.select_type_temporary
;
12078 allocatable
= sym
->attr
.allocatable
;
12079 dimension
= sym
->attr
.dimension
;
12084 if (dimension
&& as
->type
!= AS_ASSUMED_RANK
)
12086 gfc_error ("Allocatable array %qs at %L must have a deferred "
12087 "shape or assumed rank", sym
->name
, &sym
->declared_at
);
12090 else if (!gfc_notify_std (GFC_STD_F2003
, "Scalar object "
12091 "%qs at %L may not be ALLOCATABLE",
12092 sym
->name
, &sym
->declared_at
))
12096 if (pointer
&& dimension
&& as
->type
!= AS_ASSUMED_RANK
)
12098 gfc_error ("Array pointer %qs at %L must have a deferred shape or "
12099 "assumed rank", sym
->name
, &sym
->declared_at
);
12105 if (!mp_flag
&& !sym
->attr
.allocatable
&& !sym
->attr
.pointer
12106 && sym
->ts
.type
!= BT_CLASS
&& !sym
->assoc
)
12108 gfc_error ("Array %qs at %L cannot have a deferred shape",
12109 sym
->name
, &sym
->declared_at
);
12114 /* Constraints on polymorphic variables. */
12115 if (sym
->ts
.type
== BT_CLASS
&& !(sym
->result
&& sym
->result
!= sym
))
12118 if (sym
->attr
.class_ok
12119 && !sym
->attr
.select_type_temporary
12120 && !UNLIMITED_POLY (sym
)
12121 && !gfc_type_is_extensible (CLASS_DATA (sym
)->ts
.u
.derived
))
12123 gfc_error ("Type %qs of CLASS variable %qs at %L is not extensible",
12124 CLASS_DATA (sym
)->ts
.u
.derived
->name
, sym
->name
,
12125 &sym
->declared_at
);
12130 /* Assume that use associated symbols were checked in the module ns.
12131 Class-variables that are associate-names are also something special
12132 and excepted from the test. */
12133 if (!sym
->attr
.class_ok
&& !sym
->attr
.use_assoc
&& !sym
->assoc
)
12135 gfc_error ("CLASS variable %qs at %L must be dummy, allocatable "
12136 "or pointer", sym
->name
, &sym
->declared_at
);
12145 /* Additional checks for symbols with flavor variable and derived
12146 type. To be called from resolve_fl_variable. */
12149 resolve_fl_variable_derived (gfc_symbol
*sym
, int no_init_flag
)
12151 gcc_assert (sym
->ts
.type
== BT_DERIVED
|| sym
->ts
.type
== BT_CLASS
);
12153 /* Check to see if a derived type is blocked from being host
12154 associated by the presence of another class I symbol in the same
12155 namespace. 14.6.1.3 of the standard and the discussion on
12156 comp.lang.fortran. */
12157 if (sym
->ns
!= sym
->ts
.u
.derived
->ns
12158 && !sym
->ts
.u
.derived
->attr
.use_assoc
12159 && sym
->ns
->proc_name
->attr
.if_source
!= IFSRC_IFBODY
)
12162 gfc_find_symbol (sym
->ts
.u
.derived
->name
, sym
->ns
, 0, &s
);
12163 if (s
&& s
->attr
.generic
)
12164 s
= gfc_find_dt_in_generic (s
);
12165 if (s
&& !gfc_fl_struct (s
->attr
.flavor
))
12167 gfc_error ("The type %qs cannot be host associated at %L "
12168 "because it is blocked by an incompatible object "
12169 "of the same name declared at %L",
12170 sym
->ts
.u
.derived
->name
, &sym
->declared_at
,
12176 /* 4th constraint in section 11.3: "If an object of a type for which
12177 component-initialization is specified (R429) appears in the
12178 specification-part of a module and does not have the ALLOCATABLE
12179 or POINTER attribute, the object shall have the SAVE attribute."
12181 The check for initializers is performed with
12182 gfc_has_default_initializer because gfc_default_initializer generates
12183 a hidden default for allocatable components. */
12184 if (!(sym
->value
|| no_init_flag
) && sym
->ns
->proc_name
12185 && sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
12186 && !(sym
->ns
->save_all
&& !sym
->attr
.automatic
) && !sym
->attr
.save
12187 && !sym
->attr
.pointer
&& !sym
->attr
.allocatable
12188 && gfc_has_default_initializer (sym
->ts
.u
.derived
)
12189 && !gfc_notify_std (GFC_STD_F2008
, "Implied SAVE for module variable "
12190 "%qs at %L, needed due to the default "
12191 "initialization", sym
->name
, &sym
->declared_at
))
12194 /* Assign default initializer. */
12195 if (!(sym
->value
|| sym
->attr
.pointer
|| sym
->attr
.allocatable
)
12196 && (!no_init_flag
|| sym
->attr
.intent
== INTENT_OUT
))
12197 sym
->value
= gfc_generate_initializer (&sym
->ts
, can_generate_init (sym
));
12203 /* F2008, C402 (R401): A colon shall not be used as a type-param-value
12204 except in the declaration of an entity or component that has the POINTER
12205 or ALLOCATABLE attribute. */
12208 deferred_requirements (gfc_symbol
*sym
)
12210 if (sym
->ts
.deferred
12211 && !(sym
->attr
.pointer
12212 || sym
->attr
.allocatable
12213 || sym
->attr
.associate_var
12214 || sym
->attr
.omp_udr_artificial_var
))
12216 gfc_error ("Entity %qs at %L has a deferred type parameter and "
12217 "requires either the POINTER or ALLOCATABLE attribute",
12218 sym
->name
, &sym
->declared_at
);
12225 /* Resolve symbols with flavor variable. */
12228 resolve_fl_variable (gfc_symbol
*sym
, int mp_flag
)
12230 int no_init_flag
, automatic_flag
;
12232 const char *auto_save_msg
;
12233 bool saved_specification_expr
;
12235 auto_save_msg
= "Automatic object %qs at %L cannot have the "
12238 if (!resolve_fl_var_and_proc (sym
, mp_flag
))
12241 /* Set this flag to check that variables are parameters of all entries.
12242 This check is effected by the call to gfc_resolve_expr through
12243 is_non_constant_shape_array. */
12244 saved_specification_expr
= specification_expr
;
12245 specification_expr
= true;
12247 if (sym
->ns
->proc_name
12248 && (sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
12249 || sym
->ns
->proc_name
->attr
.is_main_program
)
12250 && !sym
->attr
.use_assoc
12251 && !sym
->attr
.allocatable
12252 && !sym
->attr
.pointer
12253 && is_non_constant_shape_array (sym
))
12255 /* F08:C541. The shape of an array defined in a main program or module
12256 * needs to be constant. */
12257 gfc_error ("The module or main program array %qs at %L must "
12258 "have constant shape", sym
->name
, &sym
->declared_at
);
12259 specification_expr
= saved_specification_expr
;
12263 /* Constraints on deferred type parameter. */
12264 if (!deferred_requirements (sym
))
12267 if (sym
->ts
.type
== BT_CHARACTER
&& !sym
->attr
.associate_var
)
12269 /* Make sure that character string variables with assumed length are
12270 dummy arguments. */
12271 e
= sym
->ts
.u
.cl
->length
;
12272 if (e
== NULL
&& !sym
->attr
.dummy
&& !sym
->attr
.result
12273 && !sym
->ts
.deferred
&& !sym
->attr
.select_type_temporary
12274 && !sym
->attr
.omp_udr_artificial_var
)
12276 gfc_error ("Entity with assumed character length at %L must be a "
12277 "dummy argument or a PARAMETER", &sym
->declared_at
);
12278 specification_expr
= saved_specification_expr
;
12282 if (e
&& sym
->attr
.save
== SAVE_EXPLICIT
&& !gfc_is_constant_expr (e
))
12284 gfc_error (auto_save_msg
, sym
->name
, &sym
->declared_at
);
12285 specification_expr
= saved_specification_expr
;
12289 if (!gfc_is_constant_expr (e
)
12290 && !(e
->expr_type
== EXPR_VARIABLE
12291 && e
->symtree
->n
.sym
->attr
.flavor
== FL_PARAMETER
))
12293 if (!sym
->attr
.use_assoc
&& sym
->ns
->proc_name
12294 && (sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
12295 || sym
->ns
->proc_name
->attr
.is_main_program
))
12297 gfc_error ("%qs at %L must have constant character length "
12298 "in this context", sym
->name
, &sym
->declared_at
);
12299 specification_expr
= saved_specification_expr
;
12302 if (sym
->attr
.in_common
)
12304 gfc_error ("COMMON variable %qs at %L must have constant "
12305 "character length", sym
->name
, &sym
->declared_at
);
12306 specification_expr
= saved_specification_expr
;
12312 if (sym
->value
== NULL
&& sym
->attr
.referenced
)
12313 apply_default_init_local (sym
); /* Try to apply a default initialization. */
12315 /* Determine if the symbol may not have an initializer. */
12316 no_init_flag
= automatic_flag
= 0;
12317 if (sym
->attr
.allocatable
|| sym
->attr
.external
|| sym
->attr
.dummy
12318 || sym
->attr
.intrinsic
|| sym
->attr
.result
)
12320 else if ((sym
->attr
.dimension
|| sym
->attr
.codimension
) && !sym
->attr
.pointer
12321 && is_non_constant_shape_array (sym
))
12323 no_init_flag
= automatic_flag
= 1;
12325 /* Also, they must not have the SAVE attribute.
12326 SAVE_IMPLICIT is checked below. */
12327 if (sym
->as
&& sym
->attr
.codimension
)
12329 int corank
= sym
->as
->corank
;
12330 sym
->as
->corank
= 0;
12331 no_init_flag
= automatic_flag
= is_non_constant_shape_array (sym
);
12332 sym
->as
->corank
= corank
;
12334 if (automatic_flag
&& sym
->attr
.save
== SAVE_EXPLICIT
)
12336 gfc_error (auto_save_msg
, sym
->name
, &sym
->declared_at
);
12337 specification_expr
= saved_specification_expr
;
12342 /* Ensure that any initializer is simplified. */
12344 gfc_simplify_expr (sym
->value
, 1);
12346 /* Reject illegal initializers. */
12347 if (!sym
->mark
&& sym
->value
)
12349 if (sym
->attr
.allocatable
|| (sym
->ts
.type
== BT_CLASS
12350 && CLASS_DATA (sym
)->attr
.allocatable
))
12351 gfc_error ("Allocatable %qs at %L cannot have an initializer",
12352 sym
->name
, &sym
->declared_at
);
12353 else if (sym
->attr
.external
)
12354 gfc_error ("External %qs at %L cannot have an initializer",
12355 sym
->name
, &sym
->declared_at
);
12356 else if (sym
->attr
.dummy
12357 && !(sym
->ts
.type
== BT_DERIVED
&& sym
->attr
.intent
== INTENT_OUT
))
12358 gfc_error ("Dummy %qs at %L cannot have an initializer",
12359 sym
->name
, &sym
->declared_at
);
12360 else if (sym
->attr
.intrinsic
)
12361 gfc_error ("Intrinsic %qs at %L cannot have an initializer",
12362 sym
->name
, &sym
->declared_at
);
12363 else if (sym
->attr
.result
)
12364 gfc_error ("Function result %qs at %L cannot have an initializer",
12365 sym
->name
, &sym
->declared_at
);
12366 else if (automatic_flag
)
12367 gfc_error ("Automatic array %qs at %L cannot have an initializer",
12368 sym
->name
, &sym
->declared_at
);
12370 goto no_init_error
;
12371 specification_expr
= saved_specification_expr
;
12376 if (sym
->ts
.type
== BT_DERIVED
|| sym
->ts
.type
== BT_CLASS
)
12378 bool res
= resolve_fl_variable_derived (sym
, no_init_flag
);
12379 specification_expr
= saved_specification_expr
;
12383 specification_expr
= saved_specification_expr
;
12388 /* Compare the dummy characteristics of a module procedure interface
12389 declaration with the corresponding declaration in a submodule. */
12390 static gfc_formal_arglist
*new_formal
;
12391 static char errmsg
[200];
12394 compare_fsyms (gfc_symbol
*sym
)
12398 if (sym
== NULL
|| new_formal
== NULL
)
12401 fsym
= new_formal
->sym
;
12406 if (strcmp (sym
->name
, fsym
->name
) == 0)
12408 if (!gfc_check_dummy_characteristics (fsym
, sym
, true, errmsg
, 200))
12409 gfc_error ("%s at %L", errmsg
, &fsym
->declared_at
);
12414 /* Resolve a procedure. */
12417 resolve_fl_procedure (gfc_symbol
*sym
, int mp_flag
)
12419 gfc_formal_arglist
*arg
;
12421 if (sym
->attr
.function
12422 && !resolve_fl_var_and_proc (sym
, mp_flag
))
12425 if (sym
->ts
.type
== BT_CHARACTER
)
12427 gfc_charlen
*cl
= sym
->ts
.u
.cl
;
12429 if (cl
&& cl
->length
&& gfc_is_constant_expr (cl
->length
)
12430 && !resolve_charlen (cl
))
12433 if ((!cl
|| !cl
->length
|| cl
->length
->expr_type
!= EXPR_CONSTANT
)
12434 && sym
->attr
.proc
== PROC_ST_FUNCTION
)
12436 gfc_error ("Character-valued statement function %qs at %L must "
12437 "have constant length", sym
->name
, &sym
->declared_at
);
12442 /* Ensure that derived type for are not of a private type. Internal
12443 module procedures are excluded by 2.2.3.3 - i.e., they are not
12444 externally accessible and can access all the objects accessible in
12446 if (!(sym
->ns
->parent
12447 && sym
->ns
->parent
->proc_name
->attr
.flavor
== FL_MODULE
)
12448 && gfc_check_symbol_access (sym
))
12450 gfc_interface
*iface
;
12452 for (arg
= gfc_sym_get_dummy_args (sym
); arg
; arg
= arg
->next
)
12455 && arg
->sym
->ts
.type
== BT_DERIVED
12456 && !arg
->sym
->ts
.u
.derived
->attr
.use_assoc
12457 && !gfc_check_symbol_access (arg
->sym
->ts
.u
.derived
)
12458 && !gfc_notify_std (GFC_STD_F2003
, "%qs is of a PRIVATE type "
12459 "and cannot be a dummy argument"
12460 " of %qs, which is PUBLIC at %L",
12461 arg
->sym
->name
, sym
->name
,
12462 &sym
->declared_at
))
12464 /* Stop this message from recurring. */
12465 arg
->sym
->ts
.u
.derived
->attr
.access
= ACCESS_PUBLIC
;
12470 /* PUBLIC interfaces may expose PRIVATE procedures that take types
12471 PRIVATE to the containing module. */
12472 for (iface
= sym
->generic
; iface
; iface
= iface
->next
)
12474 for (arg
= gfc_sym_get_dummy_args (iface
->sym
); arg
; arg
= arg
->next
)
12477 && arg
->sym
->ts
.type
== BT_DERIVED
12478 && !arg
->sym
->ts
.u
.derived
->attr
.use_assoc
12479 && !gfc_check_symbol_access (arg
->sym
->ts
.u
.derived
)
12480 && !gfc_notify_std (GFC_STD_F2003
, "Procedure %qs in "
12481 "PUBLIC interface %qs at %L "
12482 "takes dummy arguments of %qs which "
12483 "is PRIVATE", iface
->sym
->name
,
12484 sym
->name
, &iface
->sym
->declared_at
,
12485 gfc_typename(&arg
->sym
->ts
)))
12487 /* Stop this message from recurring. */
12488 arg
->sym
->ts
.u
.derived
->attr
.access
= ACCESS_PUBLIC
;
12495 if (sym
->attr
.function
&& sym
->value
&& sym
->attr
.proc
!= PROC_ST_FUNCTION
12496 && !sym
->attr
.proc_pointer
)
12498 gfc_error ("Function %qs at %L cannot have an initializer",
12499 sym
->name
, &sym
->declared_at
);
12503 /* An external symbol may not have an initializer because it is taken to be
12504 a procedure. Exception: Procedure Pointers. */
12505 if (sym
->attr
.external
&& sym
->value
&& !sym
->attr
.proc_pointer
)
12507 gfc_error ("External object %qs at %L may not have an initializer",
12508 sym
->name
, &sym
->declared_at
);
12512 /* An elemental function is required to return a scalar 12.7.1 */
12513 if (sym
->attr
.elemental
&& sym
->attr
.function
12514 && (sym
->as
|| (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
)->as
)))
12516 gfc_error ("ELEMENTAL function %qs at %L must have a scalar "
12517 "result", sym
->name
, &sym
->declared_at
);
12518 /* Reset so that the error only occurs once. */
12519 sym
->attr
.elemental
= 0;
12523 if (sym
->attr
.proc
== PROC_ST_FUNCTION
12524 && (sym
->attr
.allocatable
|| sym
->attr
.pointer
))
12526 gfc_error ("Statement function %qs at %L may not have pointer or "
12527 "allocatable attribute", sym
->name
, &sym
->declared_at
);
12531 /* 5.1.1.5 of the Standard: A function name declared with an asterisk
12532 char-len-param shall not be array-valued, pointer-valued, recursive
12533 or pure. ....snip... A character value of * may only be used in the
12534 following ways: (i) Dummy arg of procedure - dummy associates with
12535 actual length; (ii) To declare a named constant; or (iii) External
12536 function - but length must be declared in calling scoping unit. */
12537 if (sym
->attr
.function
12538 && sym
->ts
.type
== BT_CHARACTER
&& !sym
->ts
.deferred
12539 && sym
->ts
.u
.cl
&& sym
->ts
.u
.cl
->length
== NULL
)
12541 if ((sym
->as
&& sym
->as
->rank
) || (sym
->attr
.pointer
)
12542 || (sym
->attr
.recursive
) || (sym
->attr
.pure
))
12544 if (sym
->as
&& sym
->as
->rank
)
12545 gfc_error ("CHARACTER(*) function %qs at %L cannot be "
12546 "array-valued", sym
->name
, &sym
->declared_at
);
12548 if (sym
->attr
.pointer
)
12549 gfc_error ("CHARACTER(*) function %qs at %L cannot be "
12550 "pointer-valued", sym
->name
, &sym
->declared_at
);
12552 if (sym
->attr
.pure
)
12553 gfc_error ("CHARACTER(*) function %qs at %L cannot be "
12554 "pure", sym
->name
, &sym
->declared_at
);
12556 if (sym
->attr
.recursive
)
12557 gfc_error ("CHARACTER(*) function %qs at %L cannot be "
12558 "recursive", sym
->name
, &sym
->declared_at
);
12563 /* Appendix B.2 of the standard. Contained functions give an
12564 error anyway. Deferred character length is an F2003 feature.
12565 Don't warn on intrinsic conversion functions, which start
12566 with two underscores. */
12567 if (!sym
->attr
.contained
&& !sym
->ts
.deferred
12568 && (sym
->name
[0] != '_' || sym
->name
[1] != '_'))
12569 gfc_notify_std (GFC_STD_F95_OBS
,
12570 "CHARACTER(*) function %qs at %L",
12571 sym
->name
, &sym
->declared_at
);
12574 /* F2008, C1218. */
12575 if (sym
->attr
.elemental
)
12577 if (sym
->attr
.proc_pointer
)
12579 gfc_error ("Procedure pointer %qs at %L shall not be elemental",
12580 sym
->name
, &sym
->declared_at
);
12583 if (sym
->attr
.dummy
)
12585 gfc_error ("Dummy procedure %qs at %L shall not be elemental",
12586 sym
->name
, &sym
->declared_at
);
12591 /* F2018, C15100: "The result of an elemental function shall be scalar,
12592 and shall not have the POINTER or ALLOCATABLE attribute." The scalar
12593 pointer is tested and caught elsewhere. */
12594 if (sym
->attr
.elemental
&& sym
->result
12595 && (sym
->result
->attr
.allocatable
|| sym
->result
->attr
.pointer
))
12597 gfc_error ("Function result variable %qs at %L of elemental "
12598 "function %qs shall not have an ALLOCATABLE or POINTER "
12599 "attribute", sym
->result
->name
,
12600 &sym
->result
->declared_at
, sym
->name
);
12604 if (sym
->attr
.is_bind_c
&& sym
->attr
.is_c_interop
!= 1)
12606 gfc_formal_arglist
*curr_arg
;
12607 int has_non_interop_arg
= 0;
12609 if (!verify_bind_c_sym (sym
, &(sym
->ts
), sym
->attr
.in_common
,
12610 sym
->common_block
))
12612 /* Clear these to prevent looking at them again if there was an
12614 sym
->attr
.is_bind_c
= 0;
12615 sym
->attr
.is_c_interop
= 0;
12616 sym
->ts
.is_c_interop
= 0;
12620 /* So far, no errors have been found. */
12621 sym
->attr
.is_c_interop
= 1;
12622 sym
->ts
.is_c_interop
= 1;
12625 curr_arg
= gfc_sym_get_dummy_args (sym
);
12626 while (curr_arg
!= NULL
)
12628 /* Skip implicitly typed dummy args here. */
12629 if (curr_arg
->sym
&& curr_arg
->sym
->attr
.implicit_type
== 0)
12630 if (!gfc_verify_c_interop_param (curr_arg
->sym
))
12631 /* If something is found to fail, record the fact so we
12632 can mark the symbol for the procedure as not being
12633 BIND(C) to try and prevent multiple errors being
12635 has_non_interop_arg
= 1;
12637 curr_arg
= curr_arg
->next
;
12640 /* See if any of the arguments were not interoperable and if so, clear
12641 the procedure symbol to prevent duplicate error messages. */
12642 if (has_non_interop_arg
!= 0)
12644 sym
->attr
.is_c_interop
= 0;
12645 sym
->ts
.is_c_interop
= 0;
12646 sym
->attr
.is_bind_c
= 0;
12650 if (!sym
->attr
.proc_pointer
)
12652 if (sym
->attr
.save
== SAVE_EXPLICIT
)
12654 gfc_error ("PROCEDURE attribute conflicts with SAVE attribute "
12655 "in %qs at %L", sym
->name
, &sym
->declared_at
);
12658 if (sym
->attr
.intent
)
12660 gfc_error ("PROCEDURE attribute conflicts with INTENT attribute "
12661 "in %qs at %L", sym
->name
, &sym
->declared_at
);
12664 if (sym
->attr
.subroutine
&& sym
->attr
.result
)
12666 gfc_error ("PROCEDURE attribute conflicts with RESULT attribute "
12667 "in %qs at %L", sym
->name
, &sym
->declared_at
);
12670 if (sym
->attr
.external
&& sym
->attr
.function
&& !sym
->attr
.module_procedure
12671 && ((sym
->attr
.if_source
== IFSRC_DECL
&& !sym
->attr
.procedure
)
12672 || sym
->attr
.contained
))
12674 gfc_error ("EXTERNAL attribute conflicts with FUNCTION attribute "
12675 "in %qs at %L", sym
->name
, &sym
->declared_at
);
12678 if (strcmp ("ppr@", sym
->name
) == 0)
12680 gfc_error ("Procedure pointer result %qs at %L "
12681 "is missing the pointer attribute",
12682 sym
->ns
->proc_name
->name
, &sym
->declared_at
);
12687 /* Assume that a procedure whose body is not known has references
12688 to external arrays. */
12689 if (sym
->attr
.if_source
!= IFSRC_DECL
)
12690 sym
->attr
.array_outer_dependency
= 1;
12692 /* Compare the characteristics of a module procedure with the
12693 interface declaration. Ideally this would be done with
12694 gfc_compare_interfaces but, at present, the formal interface
12695 cannot be copied to the ts.interface. */
12696 if (sym
->attr
.module_procedure
12697 && sym
->attr
.if_source
== IFSRC_DECL
)
12700 char name
[2*GFC_MAX_SYMBOL_LEN
+ 1];
12702 char *submodule_name
;
12703 strcpy (name
, sym
->ns
->proc_name
->name
);
12704 module_name
= strtok (name
, ".");
12705 submodule_name
= strtok (NULL
, ".");
12707 iface
= sym
->tlink
;
12710 /* Make sure that the result uses the correct charlen for deferred
12712 if (iface
&& sym
->result
12713 && iface
->ts
.type
== BT_CHARACTER
12714 && iface
->ts
.deferred
)
12715 sym
->result
->ts
.u
.cl
= iface
->ts
.u
.cl
;
12720 /* Check the procedure characteristics. */
12721 if (sym
->attr
.elemental
!= iface
->attr
.elemental
)
12723 gfc_error ("Mismatch in ELEMENTAL attribute between MODULE "
12724 "PROCEDURE at %L and its interface in %s",
12725 &sym
->declared_at
, module_name
);
12729 if (sym
->attr
.pure
!= iface
->attr
.pure
)
12731 gfc_error ("Mismatch in PURE attribute between MODULE "
12732 "PROCEDURE at %L and its interface in %s",
12733 &sym
->declared_at
, module_name
);
12737 if (sym
->attr
.recursive
!= iface
->attr
.recursive
)
12739 gfc_error ("Mismatch in RECURSIVE attribute between MODULE "
12740 "PROCEDURE at %L and its interface in %s",
12741 &sym
->declared_at
, module_name
);
12745 /* Check the result characteristics. */
12746 if (!gfc_check_result_characteristics (sym
, iface
, errmsg
, 200))
12748 gfc_error ("%s between the MODULE PROCEDURE declaration "
12749 "in MODULE %qs and the declaration at %L in "
12751 errmsg
, module_name
, &sym
->declared_at
,
12752 submodule_name
? submodule_name
: module_name
);
12757 /* Check the characteristics of the formal arguments. */
12758 if (sym
->formal
&& sym
->formal_ns
)
12760 for (arg
= sym
->formal
; arg
&& arg
->sym
; arg
= arg
->next
)
12763 gfc_traverse_ns (sym
->formal_ns
, compare_fsyms
);
12771 /* Resolve a list of finalizer procedures. That is, after they have hopefully
12772 been defined and we now know their defined arguments, check that they fulfill
12773 the requirements of the standard for procedures used as finalizers. */
12776 gfc_resolve_finalizers (gfc_symbol
* derived
, bool *finalizable
)
12778 gfc_finalizer
* list
;
12779 gfc_finalizer
** prev_link
; /* For removing wrong entries from the list. */
12780 bool result
= true;
12781 bool seen_scalar
= false;
12784 gfc_symbol
*parent
= gfc_get_derived_super_type (derived
);
12787 gfc_resolve_finalizers (parent
, finalizable
);
12789 /* Ensure that derived-type components have a their finalizers resolved. */
12790 bool has_final
= derived
->f2k_derived
&& derived
->f2k_derived
->finalizers
;
12791 for (c
= derived
->components
; c
; c
= c
->next
)
12792 if (c
->ts
.type
== BT_DERIVED
12793 && !c
->attr
.pointer
&& !c
->attr
.proc_pointer
&& !c
->attr
.allocatable
)
12795 bool has_final2
= false;
12796 if (!gfc_resolve_finalizers (c
->ts
.u
.derived
, &has_final2
))
12797 return false; /* Error. */
12798 has_final
= has_final
|| has_final2
;
12800 /* Return early if not finalizable. */
12804 *finalizable
= false;
12808 /* Walk over the list of finalizer-procedures, check them, and if any one
12809 does not fit in with the standard's definition, print an error and remove
12810 it from the list. */
12811 prev_link
= &derived
->f2k_derived
->finalizers
;
12812 for (list
= derived
->f2k_derived
->finalizers
; list
; list
= *prev_link
)
12814 gfc_formal_arglist
*dummy_args
;
12819 /* Skip this finalizer if we already resolved it. */
12820 if (list
->proc_tree
)
12822 if (list
->proc_tree
->n
.sym
->formal
->sym
->as
== NULL
12823 || list
->proc_tree
->n
.sym
->formal
->sym
->as
->rank
== 0)
12824 seen_scalar
= true;
12825 prev_link
= &(list
->next
);
12829 /* Check this exists and is a SUBROUTINE. */
12830 if (!list
->proc_sym
->attr
.subroutine
)
12832 gfc_error ("FINAL procedure %qs at %L is not a SUBROUTINE",
12833 list
->proc_sym
->name
, &list
->where
);
12837 /* We should have exactly one argument. */
12838 dummy_args
= gfc_sym_get_dummy_args (list
->proc_sym
);
12839 if (!dummy_args
|| dummy_args
->next
)
12841 gfc_error ("FINAL procedure at %L must have exactly one argument",
12845 arg
= dummy_args
->sym
;
12847 /* This argument must be of our type. */
12848 if (arg
->ts
.type
!= BT_DERIVED
|| arg
->ts
.u
.derived
!= derived
)
12850 gfc_error ("Argument of FINAL procedure at %L must be of type %qs",
12851 &arg
->declared_at
, derived
->name
);
12855 /* It must neither be a pointer nor allocatable nor optional. */
12856 if (arg
->attr
.pointer
)
12858 gfc_error ("Argument of FINAL procedure at %L must not be a POINTER",
12859 &arg
->declared_at
);
12862 if (arg
->attr
.allocatable
)
12864 gfc_error ("Argument of FINAL procedure at %L must not be"
12865 " ALLOCATABLE", &arg
->declared_at
);
12868 if (arg
->attr
.optional
)
12870 gfc_error ("Argument of FINAL procedure at %L must not be OPTIONAL",
12871 &arg
->declared_at
);
12875 /* It must not be INTENT(OUT). */
12876 if (arg
->attr
.intent
== INTENT_OUT
)
12878 gfc_error ("Argument of FINAL procedure at %L must not be"
12879 " INTENT(OUT)", &arg
->declared_at
);
12883 /* Warn if the procedure is non-scalar and not assumed shape. */
12884 if (warn_surprising
&& arg
->as
&& arg
->as
->rank
!= 0
12885 && arg
->as
->type
!= AS_ASSUMED_SHAPE
)
12886 gfc_warning (OPT_Wsurprising
,
12887 "Non-scalar FINAL procedure at %L should have assumed"
12888 " shape argument", &arg
->declared_at
);
12890 /* Check that it does not match in kind and rank with a FINAL procedure
12891 defined earlier. To really loop over the *earlier* declarations,
12892 we need to walk the tail of the list as new ones were pushed at the
12894 /* TODO: Handle kind parameters once they are implemented. */
12895 my_rank
= (arg
->as
? arg
->as
->rank
: 0);
12896 for (i
= list
->next
; i
; i
= i
->next
)
12898 gfc_formal_arglist
*dummy_args
;
12900 /* Argument list might be empty; that is an error signalled earlier,
12901 but we nevertheless continued resolving. */
12902 dummy_args
= gfc_sym_get_dummy_args (i
->proc_sym
);
12905 gfc_symbol
* i_arg
= dummy_args
->sym
;
12906 const int i_rank
= (i_arg
->as
? i_arg
->as
->rank
: 0);
12907 if (i_rank
== my_rank
)
12909 gfc_error ("FINAL procedure %qs declared at %L has the same"
12910 " rank (%d) as %qs",
12911 list
->proc_sym
->name
, &list
->where
, my_rank
,
12912 i
->proc_sym
->name
);
12918 /* Is this the/a scalar finalizer procedure? */
12920 seen_scalar
= true;
12922 /* Find the symtree for this procedure. */
12923 gcc_assert (!list
->proc_tree
);
12924 list
->proc_tree
= gfc_find_sym_in_symtree (list
->proc_sym
);
12926 prev_link
= &list
->next
;
12929 /* Remove wrong nodes immediately from the list so we don't risk any
12930 troubles in the future when they might fail later expectations. */
12933 *prev_link
= list
->next
;
12934 gfc_free_finalizer (i
);
12938 if (result
== false)
12941 /* Warn if we haven't seen a scalar finalizer procedure (but we know there
12942 were nodes in the list, must have been for arrays. It is surely a good
12943 idea to have a scalar version there if there's something to finalize. */
12944 if (warn_surprising
&& derived
->f2k_derived
->finalizers
&& !seen_scalar
)
12945 gfc_warning (OPT_Wsurprising
,
12946 "Only array FINAL procedures declared for derived type %qs"
12947 " defined at %L, suggest also scalar one",
12948 derived
->name
, &derived
->declared_at
);
12950 vtab
= gfc_find_derived_vtab (derived
);
12951 c
= vtab
->ts
.u
.derived
->components
->next
->next
->next
->next
->next
;
12952 gfc_set_sym_referenced (c
->initializer
->symtree
->n
.sym
);
12955 *finalizable
= true;
12961 /* Check if two GENERIC targets are ambiguous and emit an error is they are. */
12964 check_generic_tbp_ambiguity (gfc_tbp_generic
* t1
, gfc_tbp_generic
* t2
,
12965 const char* generic_name
, locus where
)
12967 gfc_symbol
*sym1
, *sym2
;
12968 const char *pass1
, *pass2
;
12969 gfc_formal_arglist
*dummy_args
;
12971 gcc_assert (t1
->specific
&& t2
->specific
);
12972 gcc_assert (!t1
->specific
->is_generic
);
12973 gcc_assert (!t2
->specific
->is_generic
);
12974 gcc_assert (t1
->is_operator
== t2
->is_operator
);
12976 sym1
= t1
->specific
->u
.specific
->n
.sym
;
12977 sym2
= t2
->specific
->u
.specific
->n
.sym
;
12982 /* Both must be SUBROUTINEs or both must be FUNCTIONs. */
12983 if (sym1
->attr
.subroutine
!= sym2
->attr
.subroutine
12984 || sym1
->attr
.function
!= sym2
->attr
.function
)
12986 gfc_error ("%qs and %qs can't be mixed FUNCTION/SUBROUTINE for"
12987 " GENERIC %qs at %L",
12988 sym1
->name
, sym2
->name
, generic_name
, &where
);
12992 /* Determine PASS arguments. */
12993 if (t1
->specific
->nopass
)
12995 else if (t1
->specific
->pass_arg
)
12996 pass1
= t1
->specific
->pass_arg
;
12999 dummy_args
= gfc_sym_get_dummy_args (t1
->specific
->u
.specific
->n
.sym
);
13001 pass1
= dummy_args
->sym
->name
;
13005 if (t2
->specific
->nopass
)
13007 else if (t2
->specific
->pass_arg
)
13008 pass2
= t2
->specific
->pass_arg
;
13011 dummy_args
= gfc_sym_get_dummy_args (t2
->specific
->u
.specific
->n
.sym
);
13013 pass2
= dummy_args
->sym
->name
;
13018 /* Compare the interfaces. */
13019 if (gfc_compare_interfaces (sym1
, sym2
, sym2
->name
, !t1
->is_operator
, 0,
13020 NULL
, 0, pass1
, pass2
))
13022 gfc_error ("%qs and %qs for GENERIC %qs at %L are ambiguous",
13023 sym1
->name
, sym2
->name
, generic_name
, &where
);
13031 /* Worker function for resolving a generic procedure binding; this is used to
13032 resolve GENERIC as well as user and intrinsic OPERATOR typebound procedures.
13034 The difference between those cases is finding possible inherited bindings
13035 that are overridden, as one has to look for them in tb_sym_root,
13036 tb_uop_root or tb_op, respectively. Thus the caller must already find
13037 the super-type and set p->overridden correctly. */
13040 resolve_tb_generic_targets (gfc_symbol
* super_type
,
13041 gfc_typebound_proc
* p
, const char* name
)
13043 gfc_tbp_generic
* target
;
13044 gfc_symtree
* first_target
;
13045 gfc_symtree
* inherited
;
13047 gcc_assert (p
&& p
->is_generic
);
13049 /* Try to find the specific bindings for the symtrees in our target-list. */
13050 gcc_assert (p
->u
.generic
);
13051 for (target
= p
->u
.generic
; target
; target
= target
->next
)
13052 if (!target
->specific
)
13054 gfc_typebound_proc
* overridden_tbp
;
13055 gfc_tbp_generic
* g
;
13056 const char* target_name
;
13058 target_name
= target
->specific_st
->name
;
13060 /* Defined for this type directly. */
13061 if (target
->specific_st
->n
.tb
&& !target
->specific_st
->n
.tb
->error
)
13063 target
->specific
= target
->specific_st
->n
.tb
;
13064 goto specific_found
;
13067 /* Look for an inherited specific binding. */
13070 inherited
= gfc_find_typebound_proc (super_type
, NULL
, target_name
,
13075 gcc_assert (inherited
->n
.tb
);
13076 target
->specific
= inherited
->n
.tb
;
13077 goto specific_found
;
13081 gfc_error ("Undefined specific binding %qs as target of GENERIC %qs"
13082 " at %L", target_name
, name
, &p
->where
);
13085 /* Once we've found the specific binding, check it is not ambiguous with
13086 other specifics already found or inherited for the same GENERIC. */
13088 gcc_assert (target
->specific
);
13090 /* This must really be a specific binding! */
13091 if (target
->specific
->is_generic
)
13093 gfc_error ("GENERIC %qs at %L must target a specific binding,"
13094 " %qs is GENERIC, too", name
, &p
->where
, target_name
);
13098 /* Check those already resolved on this type directly. */
13099 for (g
= p
->u
.generic
; g
; g
= g
->next
)
13100 if (g
!= target
&& g
->specific
13101 && !check_generic_tbp_ambiguity (target
, g
, name
, p
->where
))
13104 /* Check for ambiguity with inherited specific targets. */
13105 for (overridden_tbp
= p
->overridden
; overridden_tbp
;
13106 overridden_tbp
= overridden_tbp
->overridden
)
13107 if (overridden_tbp
->is_generic
)
13109 for (g
= overridden_tbp
->u
.generic
; g
; g
= g
->next
)
13111 gcc_assert (g
->specific
);
13112 if (!check_generic_tbp_ambiguity (target
, g
, name
, p
->where
))
13118 /* If we attempt to "overwrite" a specific binding, this is an error. */
13119 if (p
->overridden
&& !p
->overridden
->is_generic
)
13121 gfc_error ("GENERIC %qs at %L can't overwrite specific binding with"
13122 " the same name", name
, &p
->where
);
13126 /* Take the SUBROUTINE/FUNCTION attributes of the first specific target, as
13127 all must have the same attributes here. */
13128 first_target
= p
->u
.generic
->specific
->u
.specific
;
13129 gcc_assert (first_target
);
13130 p
->subroutine
= first_target
->n
.sym
->attr
.subroutine
;
13131 p
->function
= first_target
->n
.sym
->attr
.function
;
13137 /* Resolve a GENERIC procedure binding for a derived type. */
13140 resolve_typebound_generic (gfc_symbol
* derived
, gfc_symtree
* st
)
13142 gfc_symbol
* super_type
;
13144 /* Find the overridden binding if any. */
13145 st
->n
.tb
->overridden
= NULL
;
13146 super_type
= gfc_get_derived_super_type (derived
);
13149 gfc_symtree
* overridden
;
13150 overridden
= gfc_find_typebound_proc (super_type
, NULL
, st
->name
,
13153 if (overridden
&& overridden
->n
.tb
)
13154 st
->n
.tb
->overridden
= overridden
->n
.tb
;
13157 /* Resolve using worker function. */
13158 return resolve_tb_generic_targets (super_type
, st
->n
.tb
, st
->name
);
13162 /* Retrieve the target-procedure of an operator binding and do some checks in
13163 common for intrinsic and user-defined type-bound operators. */
13166 get_checked_tb_operator_target (gfc_tbp_generic
* target
, locus where
)
13168 gfc_symbol
* target_proc
;
13170 gcc_assert (target
->specific
&& !target
->specific
->is_generic
);
13171 target_proc
= target
->specific
->u
.specific
->n
.sym
;
13172 gcc_assert (target_proc
);
13174 /* F08:C468. All operator bindings must have a passed-object dummy argument. */
13175 if (target
->specific
->nopass
)
13177 gfc_error ("Type-bound operator at %L can't be NOPASS", &where
);
13181 return target_proc
;
13185 /* Resolve a type-bound intrinsic operator. */
13188 resolve_typebound_intrinsic_op (gfc_symbol
* derived
, gfc_intrinsic_op op
,
13189 gfc_typebound_proc
* p
)
13191 gfc_symbol
* super_type
;
13192 gfc_tbp_generic
* target
;
13194 /* If there's already an error here, do nothing (but don't fail again). */
13198 /* Operators should always be GENERIC bindings. */
13199 gcc_assert (p
->is_generic
);
13201 /* Look for an overridden binding. */
13202 super_type
= gfc_get_derived_super_type (derived
);
13203 if (super_type
&& super_type
->f2k_derived
)
13204 p
->overridden
= gfc_find_typebound_intrinsic_op (super_type
, NULL
,
13207 p
->overridden
= NULL
;
13209 /* Resolve general GENERIC properties using worker function. */
13210 if (!resolve_tb_generic_targets (super_type
, p
, gfc_op2string(op
)))
13213 /* Check the targets to be procedures of correct interface. */
13214 for (target
= p
->u
.generic
; target
; target
= target
->next
)
13216 gfc_symbol
* target_proc
;
13218 target_proc
= get_checked_tb_operator_target (target
, p
->where
);
13222 if (!gfc_check_operator_interface (target_proc
, op
, p
->where
))
13225 /* Add target to non-typebound operator list. */
13226 if (!target
->specific
->deferred
&& !derived
->attr
.use_assoc
13227 && p
->access
!= ACCESS_PRIVATE
&& derived
->ns
== gfc_current_ns
)
13229 gfc_interface
*head
, *intr
;
13231 /* Preempt 'gfc_check_new_interface' for submodules, where the
13232 mechanism for handling module procedures winds up resolving
13233 operator interfaces twice and would otherwise cause an error. */
13234 for (intr
= derived
->ns
->op
[op
]; intr
; intr
= intr
->next
)
13235 if (intr
->sym
== target_proc
13236 && target_proc
->attr
.used_in_submodule
)
13239 if (!gfc_check_new_interface (derived
->ns
->op
[op
],
13240 target_proc
, p
->where
))
13242 head
= derived
->ns
->op
[op
];
13243 intr
= gfc_get_interface ();
13244 intr
->sym
= target_proc
;
13245 intr
->where
= p
->where
;
13247 derived
->ns
->op
[op
] = intr
;
13259 /* Resolve a type-bound user operator (tree-walker callback). */
13261 static gfc_symbol
* resolve_bindings_derived
;
13262 static bool resolve_bindings_result
;
13264 static bool check_uop_procedure (gfc_symbol
* sym
, locus where
);
13267 resolve_typebound_user_op (gfc_symtree
* stree
)
13269 gfc_symbol
* super_type
;
13270 gfc_tbp_generic
* target
;
13272 gcc_assert (stree
&& stree
->n
.tb
);
13274 if (stree
->n
.tb
->error
)
13277 /* Operators should always be GENERIC bindings. */
13278 gcc_assert (stree
->n
.tb
->is_generic
);
13280 /* Find overridden procedure, if any. */
13281 super_type
= gfc_get_derived_super_type (resolve_bindings_derived
);
13282 if (super_type
&& super_type
->f2k_derived
)
13284 gfc_symtree
* overridden
;
13285 overridden
= gfc_find_typebound_user_op (super_type
, NULL
,
13286 stree
->name
, true, NULL
);
13288 if (overridden
&& overridden
->n
.tb
)
13289 stree
->n
.tb
->overridden
= overridden
->n
.tb
;
13292 stree
->n
.tb
->overridden
= NULL
;
13294 /* Resolve basically using worker function. */
13295 if (!resolve_tb_generic_targets (super_type
, stree
->n
.tb
, stree
->name
))
13298 /* Check the targets to be functions of correct interface. */
13299 for (target
= stree
->n
.tb
->u
.generic
; target
; target
= target
->next
)
13301 gfc_symbol
* target_proc
;
13303 target_proc
= get_checked_tb_operator_target (target
, stree
->n
.tb
->where
);
13307 if (!check_uop_procedure (target_proc
, stree
->n
.tb
->where
))
13314 resolve_bindings_result
= false;
13315 stree
->n
.tb
->error
= 1;
13319 /* Resolve the type-bound procedures for a derived type. */
13322 resolve_typebound_procedure (gfc_symtree
* stree
)
13326 gfc_symbol
* me_arg
;
13327 gfc_symbol
* super_type
;
13328 gfc_component
* comp
;
13330 gcc_assert (stree
);
13332 /* Undefined specific symbol from GENERIC target definition. */
13336 if (stree
->n
.tb
->error
)
13339 /* If this is a GENERIC binding, use that routine. */
13340 if (stree
->n
.tb
->is_generic
)
13342 if (!resolve_typebound_generic (resolve_bindings_derived
, stree
))
13347 /* Get the target-procedure to check it. */
13348 gcc_assert (!stree
->n
.tb
->is_generic
);
13349 gcc_assert (stree
->n
.tb
->u
.specific
);
13350 proc
= stree
->n
.tb
->u
.specific
->n
.sym
;
13351 where
= stree
->n
.tb
->where
;
13353 /* Default access should already be resolved from the parser. */
13354 gcc_assert (stree
->n
.tb
->access
!= ACCESS_UNKNOWN
);
13356 if (stree
->n
.tb
->deferred
)
13358 if (!check_proc_interface (proc
, &where
))
13363 /* Check for F08:C465. */
13364 if ((!proc
->attr
.subroutine
&& !proc
->attr
.function
)
13365 || (proc
->attr
.proc
!= PROC_MODULE
13366 && proc
->attr
.if_source
!= IFSRC_IFBODY
)
13367 || proc
->attr
.abstract
)
13369 gfc_error ("%qs must be a module procedure or an external procedure with"
13370 " an explicit interface at %L", proc
->name
, &where
);
13375 stree
->n
.tb
->subroutine
= proc
->attr
.subroutine
;
13376 stree
->n
.tb
->function
= proc
->attr
.function
;
13378 /* Find the super-type of the current derived type. We could do this once and
13379 store in a global if speed is needed, but as long as not I believe this is
13380 more readable and clearer. */
13381 super_type
= gfc_get_derived_super_type (resolve_bindings_derived
);
13383 /* If PASS, resolve and check arguments if not already resolved / loaded
13384 from a .mod file. */
13385 if (!stree
->n
.tb
->nopass
&& stree
->n
.tb
->pass_arg_num
== 0)
13387 gfc_formal_arglist
*dummy_args
;
13389 dummy_args
= gfc_sym_get_dummy_args (proc
);
13390 if (stree
->n
.tb
->pass_arg
)
13392 gfc_formal_arglist
*i
;
13394 /* If an explicit passing argument name is given, walk the arg-list
13395 and look for it. */
13398 stree
->n
.tb
->pass_arg_num
= 1;
13399 for (i
= dummy_args
; i
; i
= i
->next
)
13401 if (!strcmp (i
->sym
->name
, stree
->n
.tb
->pass_arg
))
13406 ++stree
->n
.tb
->pass_arg_num
;
13411 gfc_error ("Procedure %qs with PASS(%s) at %L has no"
13413 proc
->name
, stree
->n
.tb
->pass_arg
, &where
,
13414 stree
->n
.tb
->pass_arg
);
13420 /* Otherwise, take the first one; there should in fact be at least
13422 stree
->n
.tb
->pass_arg_num
= 1;
13425 gfc_error ("Procedure %qs with PASS at %L must have at"
13426 " least one argument", proc
->name
, &where
);
13429 me_arg
= dummy_args
->sym
;
13432 /* Now check that the argument-type matches and the passed-object
13433 dummy argument is generally fine. */
13435 gcc_assert (me_arg
);
13437 if (me_arg
->ts
.type
!= BT_CLASS
)
13439 gfc_error ("Non-polymorphic passed-object dummy argument of %qs"
13440 " at %L", proc
->name
, &where
);
13444 if (CLASS_DATA (me_arg
)->ts
.u
.derived
13445 != resolve_bindings_derived
)
13447 gfc_error ("Argument %qs of %qs with PASS(%s) at %L must be of"
13448 " the derived-type %qs", me_arg
->name
, proc
->name
,
13449 me_arg
->name
, &where
, resolve_bindings_derived
->name
);
13453 gcc_assert (me_arg
->ts
.type
== BT_CLASS
);
13454 if (CLASS_DATA (me_arg
)->as
&& CLASS_DATA (me_arg
)->as
->rank
!= 0)
13456 gfc_error ("Passed-object dummy argument of %qs at %L must be"
13457 " scalar", proc
->name
, &where
);
13460 if (CLASS_DATA (me_arg
)->attr
.allocatable
)
13462 gfc_error ("Passed-object dummy argument of %qs at %L must not"
13463 " be ALLOCATABLE", proc
->name
, &where
);
13466 if (CLASS_DATA (me_arg
)->attr
.class_pointer
)
13468 gfc_error ("Passed-object dummy argument of %qs at %L must not"
13469 " be POINTER", proc
->name
, &where
);
13474 /* If we are extending some type, check that we don't override a procedure
13475 flagged NON_OVERRIDABLE. */
13476 stree
->n
.tb
->overridden
= NULL
;
13479 gfc_symtree
* overridden
;
13480 overridden
= gfc_find_typebound_proc (super_type
, NULL
,
13481 stree
->name
, true, NULL
);
13485 if (overridden
->n
.tb
)
13486 stree
->n
.tb
->overridden
= overridden
->n
.tb
;
13488 if (!gfc_check_typebound_override (stree
, overridden
))
13493 /* See if there's a name collision with a component directly in this type. */
13494 for (comp
= resolve_bindings_derived
->components
; comp
; comp
= comp
->next
)
13495 if (!strcmp (comp
->name
, stree
->name
))
13497 gfc_error ("Procedure %qs at %L has the same name as a component of"
13499 stree
->name
, &where
, resolve_bindings_derived
->name
);
13503 /* Try to find a name collision with an inherited component. */
13504 if (super_type
&& gfc_find_component (super_type
, stree
->name
, true, true,
13507 gfc_error ("Procedure %qs at %L has the same name as an inherited"
13508 " component of %qs",
13509 stree
->name
, &where
, resolve_bindings_derived
->name
);
13513 stree
->n
.tb
->error
= 0;
13517 resolve_bindings_result
= false;
13518 stree
->n
.tb
->error
= 1;
13523 resolve_typebound_procedures (gfc_symbol
* derived
)
13526 gfc_symbol
* super_type
;
13528 if (!derived
->f2k_derived
|| !derived
->f2k_derived
->tb_sym_root
)
13531 super_type
= gfc_get_derived_super_type (derived
);
13533 resolve_symbol (super_type
);
13535 resolve_bindings_derived
= derived
;
13536 resolve_bindings_result
= true;
13538 if (derived
->f2k_derived
->tb_sym_root
)
13539 gfc_traverse_symtree (derived
->f2k_derived
->tb_sym_root
,
13540 &resolve_typebound_procedure
);
13542 if (derived
->f2k_derived
->tb_uop_root
)
13543 gfc_traverse_symtree (derived
->f2k_derived
->tb_uop_root
,
13544 &resolve_typebound_user_op
);
13546 for (op
= 0; op
!= GFC_INTRINSIC_OPS
; ++op
)
13548 gfc_typebound_proc
* p
= derived
->f2k_derived
->tb_op
[op
];
13549 if (p
&& !resolve_typebound_intrinsic_op (derived
,
13550 (gfc_intrinsic_op
)op
, p
))
13551 resolve_bindings_result
= false;
13554 return resolve_bindings_result
;
13558 /* Add a derived type to the dt_list. The dt_list is used in trans-types.c
13559 to give all identical derived types the same backend_decl. */
13561 add_dt_to_dt_list (gfc_symbol
*derived
)
13563 if (!derived
->dt_next
)
13565 if (gfc_derived_types
)
13567 derived
->dt_next
= gfc_derived_types
->dt_next
;
13568 gfc_derived_types
->dt_next
= derived
;
13572 derived
->dt_next
= derived
;
13574 gfc_derived_types
= derived
;
13579 /* Ensure that a derived-type is really not abstract, meaning that every
13580 inherited DEFERRED binding is overridden by a non-DEFERRED one. */
13583 ensure_not_abstract_walker (gfc_symbol
* sub
, gfc_symtree
* st
)
13588 if (!ensure_not_abstract_walker (sub
, st
->left
))
13590 if (!ensure_not_abstract_walker (sub
, st
->right
))
13593 if (st
->n
.tb
&& st
->n
.tb
->deferred
)
13595 gfc_symtree
* overriding
;
13596 overriding
= gfc_find_typebound_proc (sub
, NULL
, st
->name
, true, NULL
);
13599 gcc_assert (overriding
->n
.tb
);
13600 if (overriding
->n
.tb
->deferred
)
13602 gfc_error ("Derived-type %qs declared at %L must be ABSTRACT because"
13603 " %qs is DEFERRED and not overridden",
13604 sub
->name
, &sub
->declared_at
, st
->name
);
13613 ensure_not_abstract (gfc_symbol
* sub
, gfc_symbol
* ancestor
)
13615 /* The algorithm used here is to recursively travel up the ancestry of sub
13616 and for each ancestor-type, check all bindings. If any of them is
13617 DEFERRED, look it up starting from sub and see if the found (overriding)
13618 binding is not DEFERRED.
13619 This is not the most efficient way to do this, but it should be ok and is
13620 clearer than something sophisticated. */
13622 gcc_assert (ancestor
&& !sub
->attr
.abstract
);
13624 if (!ancestor
->attr
.abstract
)
13627 /* Walk bindings of this ancestor. */
13628 if (ancestor
->f2k_derived
)
13631 t
= ensure_not_abstract_walker (sub
, ancestor
->f2k_derived
->tb_sym_root
);
13636 /* Find next ancestor type and recurse on it. */
13637 ancestor
= gfc_get_derived_super_type (ancestor
);
13639 return ensure_not_abstract (sub
, ancestor
);
13645 /* This check for typebound defined assignments is done recursively
13646 since the order in which derived types are resolved is not always in
13647 order of the declarations. */
13650 check_defined_assignments (gfc_symbol
*derived
)
13654 for (c
= derived
->components
; c
; c
= c
->next
)
13656 if (!gfc_bt_struct (c
->ts
.type
)
13658 || c
->attr
.allocatable
13659 || c
->attr
.proc_pointer_comp
13660 || c
->attr
.class_pointer
13661 || c
->attr
.proc_pointer
)
13664 if (c
->ts
.u
.derived
->attr
.defined_assign_comp
13665 || (c
->ts
.u
.derived
->f2k_derived
13666 && c
->ts
.u
.derived
->f2k_derived
->tb_op
[INTRINSIC_ASSIGN
]))
13668 derived
->attr
.defined_assign_comp
= 1;
13672 check_defined_assignments (c
->ts
.u
.derived
);
13673 if (c
->ts
.u
.derived
->attr
.defined_assign_comp
)
13675 derived
->attr
.defined_assign_comp
= 1;
13682 /* Resolve a single component of a derived type or structure. */
13685 resolve_component (gfc_component
*c
, gfc_symbol
*sym
)
13687 gfc_symbol
*super_type
;
13689 if (c
->attr
.artificial
)
13692 /* Do not allow vtype components to be resolved in nameless namespaces
13693 such as block data because the procedure pointers will cause ICEs
13694 and vtables are not needed in these contexts. */
13695 if (sym
->attr
.vtype
&& sym
->attr
.use_assoc
13696 && sym
->ns
->proc_name
== NULL
)
13700 if ((!sym
->attr
.is_class
|| c
!= sym
->components
)
13701 && c
->attr
.codimension
13702 && (!c
->attr
.allocatable
|| (c
->as
&& c
->as
->type
!= AS_DEFERRED
)))
13704 gfc_error ("Coarray component %qs at %L must be allocatable with "
13705 "deferred shape", c
->name
, &c
->loc
);
13710 if (c
->attr
.codimension
&& c
->ts
.type
== BT_DERIVED
13711 && c
->ts
.u
.derived
->ts
.is_iso_c
)
13713 gfc_error ("Component %qs at %L of TYPE(C_PTR) or TYPE(C_FUNPTR) "
13714 "shall not be a coarray", c
->name
, &c
->loc
);
13719 if (gfc_bt_struct (c
->ts
.type
) && c
->ts
.u
.derived
->attr
.coarray_comp
13720 && (c
->attr
.codimension
|| c
->attr
.pointer
|| c
->attr
.dimension
13721 || c
->attr
.allocatable
))
13723 gfc_error ("Component %qs at %L with coarray component "
13724 "shall be a nonpointer, nonallocatable scalar",
13730 if (c
->attr
.contiguous
&& (!c
->attr
.dimension
|| !c
->attr
.pointer
))
13732 gfc_error ("Component %qs at %L has the CONTIGUOUS attribute but "
13733 "is not an array pointer", c
->name
, &c
->loc
);
13737 /* F2003, 15.2.1 - length has to be one. */
13738 if (sym
->attr
.is_bind_c
&& c
->ts
.type
== BT_CHARACTER
13739 && (c
->ts
.u
.cl
== NULL
|| c
->ts
.u
.cl
->length
== NULL
13740 || !gfc_is_constant_expr (c
->ts
.u
.cl
->length
)
13741 || mpz_cmp_si (c
->ts
.u
.cl
->length
->value
.integer
, 1) != 0))
13743 gfc_error ("Component %qs of BIND(C) type at %L must have length one",
13748 if (c
->attr
.proc_pointer
&& c
->ts
.interface
)
13750 gfc_symbol
*ifc
= c
->ts
.interface
;
13752 if (!sym
->attr
.vtype
&& !check_proc_interface (ifc
, &c
->loc
))
13758 if (ifc
->attr
.if_source
|| ifc
->attr
.intrinsic
)
13760 /* Resolve interface and copy attributes. */
13761 if (ifc
->formal
&& !ifc
->formal_ns
)
13762 resolve_symbol (ifc
);
13763 if (ifc
->attr
.intrinsic
)
13764 gfc_resolve_intrinsic (ifc
, &ifc
->declared_at
);
13768 c
->ts
= ifc
->result
->ts
;
13769 c
->attr
.allocatable
= ifc
->result
->attr
.allocatable
;
13770 c
->attr
.pointer
= ifc
->result
->attr
.pointer
;
13771 c
->attr
.dimension
= ifc
->result
->attr
.dimension
;
13772 c
->as
= gfc_copy_array_spec (ifc
->result
->as
);
13773 c
->attr
.class_ok
= ifc
->result
->attr
.class_ok
;
13778 c
->attr
.allocatable
= ifc
->attr
.allocatable
;
13779 c
->attr
.pointer
= ifc
->attr
.pointer
;
13780 c
->attr
.dimension
= ifc
->attr
.dimension
;
13781 c
->as
= gfc_copy_array_spec (ifc
->as
);
13782 c
->attr
.class_ok
= ifc
->attr
.class_ok
;
13784 c
->ts
.interface
= ifc
;
13785 c
->attr
.function
= ifc
->attr
.function
;
13786 c
->attr
.subroutine
= ifc
->attr
.subroutine
;
13788 c
->attr
.pure
= ifc
->attr
.pure
;
13789 c
->attr
.elemental
= ifc
->attr
.elemental
;
13790 c
->attr
.recursive
= ifc
->attr
.recursive
;
13791 c
->attr
.always_explicit
= ifc
->attr
.always_explicit
;
13792 c
->attr
.ext_attr
|= ifc
->attr
.ext_attr
;
13793 /* Copy char length. */
13794 if (ifc
->ts
.type
== BT_CHARACTER
&& ifc
->ts
.u
.cl
)
13796 gfc_charlen
*cl
= gfc_new_charlen (sym
->ns
, ifc
->ts
.u
.cl
);
13797 if (cl
->length
&& !cl
->resolved
13798 && !gfc_resolve_expr (cl
->length
))
13807 else if (c
->attr
.proc_pointer
&& c
->ts
.type
== BT_UNKNOWN
)
13809 /* Since PPCs are not implicitly typed, a PPC without an explicit
13810 interface must be a subroutine. */
13811 gfc_add_subroutine (&c
->attr
, c
->name
, &c
->loc
);
13814 /* Procedure pointer components: Check PASS arg. */
13815 if (c
->attr
.proc_pointer
&& !c
->tb
->nopass
&& c
->tb
->pass_arg_num
== 0
13816 && !sym
->attr
.vtype
)
13818 gfc_symbol
* me_arg
;
13820 if (c
->tb
->pass_arg
)
13822 gfc_formal_arglist
* i
;
13824 /* If an explicit passing argument name is given, walk the arg-list
13825 and look for it. */
13828 c
->tb
->pass_arg_num
= 1;
13829 for (i
= c
->ts
.interface
->formal
; i
; i
= i
->next
)
13831 if (!strcmp (i
->sym
->name
, c
->tb
->pass_arg
))
13836 c
->tb
->pass_arg_num
++;
13841 gfc_error ("Procedure pointer component %qs with PASS(%s) "
13842 "at %L has no argument %qs", c
->name
,
13843 c
->tb
->pass_arg
, &c
->loc
, c
->tb
->pass_arg
);
13850 /* Otherwise, take the first one; there should in fact be at least
13852 c
->tb
->pass_arg_num
= 1;
13853 if (!c
->ts
.interface
->formal
)
13855 gfc_error ("Procedure pointer component %qs with PASS at %L "
13856 "must have at least one argument",
13861 me_arg
= c
->ts
.interface
->formal
->sym
;
13864 /* Now check that the argument-type matches. */
13865 gcc_assert (me_arg
);
13866 if ((me_arg
->ts
.type
!= BT_DERIVED
&& me_arg
->ts
.type
!= BT_CLASS
)
13867 || (me_arg
->ts
.type
== BT_DERIVED
&& me_arg
->ts
.u
.derived
!= sym
)
13868 || (me_arg
->ts
.type
== BT_CLASS
13869 && CLASS_DATA (me_arg
)->ts
.u
.derived
!= sym
))
13871 gfc_error ("Argument %qs of %qs with PASS(%s) at %L must be of"
13872 " the derived type %qs", me_arg
->name
, c
->name
,
13873 me_arg
->name
, &c
->loc
, sym
->name
);
13878 /* Check for F03:C453. */
13879 if (CLASS_DATA (me_arg
)->attr
.dimension
)
13881 gfc_error ("Argument %qs of %qs with PASS(%s) at %L "
13882 "must be scalar", me_arg
->name
, c
->name
, me_arg
->name
,
13888 if (CLASS_DATA (me_arg
)->attr
.class_pointer
)
13890 gfc_error ("Argument %qs of %qs with PASS(%s) at %L "
13891 "may not have the POINTER attribute", me_arg
->name
,
13892 c
->name
, me_arg
->name
, &c
->loc
);
13897 if (CLASS_DATA (me_arg
)->attr
.allocatable
)
13899 gfc_error ("Argument %qs of %qs with PASS(%s) at %L "
13900 "may not be ALLOCATABLE", me_arg
->name
, c
->name
,
13901 me_arg
->name
, &c
->loc
);
13906 if (gfc_type_is_extensible (sym
) && me_arg
->ts
.type
!= BT_CLASS
)
13908 gfc_error ("Non-polymorphic passed-object dummy argument of %qs"
13909 " at %L", c
->name
, &c
->loc
);
13915 /* Check type-spec if this is not the parent-type component. */
13916 if (((sym
->attr
.is_class
13917 && (!sym
->components
->ts
.u
.derived
->attr
.extension
13918 || c
!= sym
->components
->ts
.u
.derived
->components
))
13919 || (!sym
->attr
.is_class
13920 && (!sym
->attr
.extension
|| c
!= sym
->components
)))
13921 && !sym
->attr
.vtype
13922 && !resolve_typespec_used (&c
->ts
, &c
->loc
, c
->name
))
13925 super_type
= gfc_get_derived_super_type (sym
);
13927 /* If this type is an extension, set the accessibility of the parent
13930 && ((sym
->attr
.is_class
13931 && c
== sym
->components
->ts
.u
.derived
->components
)
13932 || (!sym
->attr
.is_class
&& c
== sym
->components
))
13933 && strcmp (super_type
->name
, c
->name
) == 0)
13934 c
->attr
.access
= super_type
->attr
.access
;
13936 /* If this type is an extension, see if this component has the same name
13937 as an inherited type-bound procedure. */
13938 if (super_type
&& !sym
->attr
.is_class
13939 && gfc_find_typebound_proc (super_type
, NULL
, c
->name
, true, NULL
))
13941 gfc_error ("Component %qs of %qs at %L has the same name as an"
13942 " inherited type-bound procedure",
13943 c
->name
, sym
->name
, &c
->loc
);
13947 if (c
->ts
.type
== BT_CHARACTER
&& !c
->attr
.proc_pointer
13948 && !c
->ts
.deferred
)
13950 if (c
->ts
.u
.cl
->length
== NULL
13951 || (!resolve_charlen(c
->ts
.u
.cl
))
13952 || !gfc_is_constant_expr (c
->ts
.u
.cl
->length
))
13954 gfc_error ("Character length of component %qs needs to "
13955 "be a constant specification expression at %L",
13957 c
->ts
.u
.cl
->length
? &c
->ts
.u
.cl
->length
->where
: &c
->loc
);
13962 if (c
->ts
.type
== BT_CHARACTER
&& c
->ts
.deferred
13963 && !c
->attr
.pointer
&& !c
->attr
.allocatable
)
13965 gfc_error ("Character component %qs of %qs at %L with deferred "
13966 "length must be a POINTER or ALLOCATABLE",
13967 c
->name
, sym
->name
, &c
->loc
);
13971 /* Add the hidden deferred length field. */
13972 if (c
->ts
.type
== BT_CHARACTER
13973 && (c
->ts
.deferred
|| c
->attr
.pdt_string
)
13974 && !c
->attr
.function
13975 && !sym
->attr
.is_class
)
13977 char name
[GFC_MAX_SYMBOL_LEN
+9];
13978 gfc_component
*strlen
;
13979 sprintf (name
, "_%s_length", c
->name
);
13980 strlen
= gfc_find_component (sym
, name
, true, true, NULL
);
13981 if (strlen
== NULL
)
13983 if (!gfc_add_component (sym
, name
, &strlen
))
13985 strlen
->ts
.type
= BT_INTEGER
;
13986 strlen
->ts
.kind
= gfc_charlen_int_kind
;
13987 strlen
->attr
.access
= ACCESS_PRIVATE
;
13988 strlen
->attr
.artificial
= 1;
13992 if (c
->ts
.type
== BT_DERIVED
13993 && sym
->component_access
!= ACCESS_PRIVATE
13994 && gfc_check_symbol_access (sym
)
13995 && !is_sym_host_assoc (c
->ts
.u
.derived
, sym
->ns
)
13996 && !c
->ts
.u
.derived
->attr
.use_assoc
13997 && !gfc_check_symbol_access (c
->ts
.u
.derived
)
13998 && !gfc_notify_std (GFC_STD_F2003
, "the component %qs is a "
13999 "PRIVATE type and cannot be a component of "
14000 "%qs, which is PUBLIC at %L", c
->name
,
14001 sym
->name
, &sym
->declared_at
))
14004 if ((sym
->attr
.sequence
|| sym
->attr
.is_bind_c
) && c
->ts
.type
== BT_CLASS
)
14006 gfc_error ("Polymorphic component %s at %L in SEQUENCE or BIND(C) "
14007 "type %s", c
->name
, &c
->loc
, sym
->name
);
14011 if (sym
->attr
.sequence
)
14013 if (c
->ts
.type
== BT_DERIVED
&& c
->ts
.u
.derived
->attr
.sequence
== 0)
14015 gfc_error ("Component %s of SEQUENCE type declared at %L does "
14016 "not have the SEQUENCE attribute",
14017 c
->ts
.u
.derived
->name
, &sym
->declared_at
);
14022 if (c
->ts
.type
== BT_DERIVED
&& c
->ts
.u
.derived
->attr
.generic
)
14023 c
->ts
.u
.derived
= gfc_find_dt_in_generic (c
->ts
.u
.derived
);
14024 else if (c
->ts
.type
== BT_CLASS
&& c
->attr
.class_ok
14025 && CLASS_DATA (c
)->ts
.u
.derived
->attr
.generic
)
14026 CLASS_DATA (c
)->ts
.u
.derived
14027 = gfc_find_dt_in_generic (CLASS_DATA (c
)->ts
.u
.derived
);
14029 /* If an allocatable component derived type is of the same type as
14030 the enclosing derived type, we need a vtable generating so that
14031 the __deallocate procedure is created. */
14032 if ((c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
14033 && c
->ts
.u
.derived
== sym
&& c
->attr
.allocatable
== 1)
14034 gfc_find_vtab (&c
->ts
);
14036 /* Ensure that all the derived type components are put on the
14037 derived type list; even in formal namespaces, where derived type
14038 pointer components might not have been declared. */
14039 if (c
->ts
.type
== BT_DERIVED
14041 && c
->ts
.u
.derived
->components
14043 && sym
!= c
->ts
.u
.derived
)
14044 add_dt_to_dt_list (c
->ts
.u
.derived
);
14046 if (!gfc_resolve_array_spec (c
->as
,
14047 !(c
->attr
.pointer
|| c
->attr
.proc_pointer
14048 || c
->attr
.allocatable
)))
14051 if (c
->initializer
&& !sym
->attr
.vtype
14052 && !c
->attr
.pdt_kind
&& !c
->attr
.pdt_len
14053 && !gfc_check_assign_symbol (sym
, c
, c
->initializer
))
14060 /* Be nice about the locus for a structure expression - show the locus of the
14061 first non-null sub-expression if we can. */
14064 cons_where (gfc_expr
*struct_expr
)
14066 gfc_constructor
*cons
;
14068 gcc_assert (struct_expr
&& struct_expr
->expr_type
== EXPR_STRUCTURE
);
14070 cons
= gfc_constructor_first (struct_expr
->value
.constructor
);
14071 for (; cons
; cons
= gfc_constructor_next (cons
))
14073 if (cons
->expr
&& cons
->expr
->expr_type
!= EXPR_NULL
)
14074 return &cons
->expr
->where
;
14077 return &struct_expr
->where
;
14080 /* Resolve the components of a structure type. Much less work than derived
14084 resolve_fl_struct (gfc_symbol
*sym
)
14087 gfc_expr
*init
= NULL
;
14090 /* Make sure UNIONs do not have overlapping initializers. */
14091 if (sym
->attr
.flavor
== FL_UNION
)
14093 for (c
= sym
->components
; c
; c
= c
->next
)
14095 if (init
&& c
->initializer
)
14097 gfc_error ("Conflicting initializers in union at %L and %L",
14098 cons_where (init
), cons_where (c
->initializer
));
14099 gfc_free_expr (c
->initializer
);
14100 c
->initializer
= NULL
;
14103 init
= c
->initializer
;
14108 for (c
= sym
->components
; c
; c
= c
->next
)
14109 if (!resolve_component (c
, sym
))
14115 if (sym
->components
)
14116 add_dt_to_dt_list (sym
);
14122 /* Resolve the components of a derived type. This does not have to wait until
14123 resolution stage, but can be done as soon as the dt declaration has been
14127 resolve_fl_derived0 (gfc_symbol
*sym
)
14129 gfc_symbol
* super_type
;
14131 gfc_formal_arglist
*f
;
14134 if (sym
->attr
.unlimited_polymorphic
)
14137 super_type
= gfc_get_derived_super_type (sym
);
14140 if (super_type
&& sym
->attr
.coarray_comp
&& !super_type
->attr
.coarray_comp
)
14142 gfc_error ("As extending type %qs at %L has a coarray component, "
14143 "parent type %qs shall also have one", sym
->name
,
14144 &sym
->declared_at
, super_type
->name
);
14148 /* Ensure the extended type gets resolved before we do. */
14149 if (super_type
&& !resolve_fl_derived0 (super_type
))
14152 /* An ABSTRACT type must be extensible. */
14153 if (sym
->attr
.abstract
&& !gfc_type_is_extensible (sym
))
14155 gfc_error ("Non-extensible derived-type %qs at %L must not be ABSTRACT",
14156 sym
->name
, &sym
->declared_at
);
14160 c
= (sym
->attr
.is_class
) ? sym
->components
->ts
.u
.derived
->components
14164 for ( ; c
!= NULL
; c
= c
->next
)
14165 if (!resolve_component (c
, sym
))
14171 /* Now add the caf token field, where needed. */
14172 if (flag_coarray
!= GFC_FCOARRAY_NONE
14173 && !sym
->attr
.is_class
&& !sym
->attr
.vtype
)
14175 for (c
= sym
->components
; c
; c
= c
->next
)
14176 if (!c
->attr
.dimension
&& !c
->attr
.codimension
14177 && (c
->attr
.allocatable
|| c
->attr
.pointer
))
14179 char name
[GFC_MAX_SYMBOL_LEN
+9];
14180 gfc_component
*token
;
14181 sprintf (name
, "_caf_%s", c
->name
);
14182 token
= gfc_find_component (sym
, name
, true, true, NULL
);
14185 if (!gfc_add_component (sym
, name
, &token
))
14187 token
->ts
.type
= BT_VOID
;
14188 token
->ts
.kind
= gfc_default_integer_kind
;
14189 token
->attr
.access
= ACCESS_PRIVATE
;
14190 token
->attr
.artificial
= 1;
14191 token
->attr
.caf_token
= 1;
14196 check_defined_assignments (sym
);
14198 if (!sym
->attr
.defined_assign_comp
&& super_type
)
14199 sym
->attr
.defined_assign_comp
14200 = super_type
->attr
.defined_assign_comp
;
14202 /* If this is a non-ABSTRACT type extending an ABSTRACT one, ensure that
14203 all DEFERRED bindings are overridden. */
14204 if (super_type
&& super_type
->attr
.abstract
&& !sym
->attr
.abstract
14205 && !sym
->attr
.is_class
14206 && !ensure_not_abstract (sym
, super_type
))
14209 /* Check that there is a component for every PDT parameter. */
14210 if (sym
->attr
.pdt_template
)
14212 for (f
= sym
->formal
; f
; f
= f
->next
)
14216 c
= gfc_find_component (sym
, f
->sym
->name
, true, true, NULL
);
14219 gfc_error ("Parameterized type %qs does not have a component "
14220 "corresponding to parameter %qs at %L", sym
->name
,
14221 f
->sym
->name
, &sym
->declared_at
);
14227 /* Add derived type to the derived type list. */
14228 add_dt_to_dt_list (sym
);
14234 /* The following procedure does the full resolution of a derived type,
14235 including resolution of all type-bound procedures (if present). In contrast
14236 to 'resolve_fl_derived0' this can only be done after the module has been
14237 parsed completely. */
14240 resolve_fl_derived (gfc_symbol
*sym
)
14242 gfc_symbol
*gen_dt
= NULL
;
14244 if (sym
->attr
.unlimited_polymorphic
)
14247 if (!sym
->attr
.is_class
)
14248 gfc_find_symbol (sym
->name
, sym
->ns
, 0, &gen_dt
);
14249 if (gen_dt
&& gen_dt
->generic
&& gen_dt
->generic
->next
14250 && (!gen_dt
->generic
->sym
->attr
.use_assoc
14251 || gen_dt
->generic
->sym
->module
!= gen_dt
->generic
->next
->sym
->module
)
14252 && !gfc_notify_std (GFC_STD_F2003
, "Generic name %qs of function "
14253 "%qs at %L being the same name as derived "
14254 "type at %L", sym
->name
,
14255 gen_dt
->generic
->sym
== sym
14256 ? gen_dt
->generic
->next
->sym
->name
14257 : gen_dt
->generic
->sym
->name
,
14258 gen_dt
->generic
->sym
== sym
14259 ? &gen_dt
->generic
->next
->sym
->declared_at
14260 : &gen_dt
->generic
->sym
->declared_at
,
14261 &sym
->declared_at
))
14264 if (sym
->components
== NULL
&& !sym
->attr
.zero_comp
&& !sym
->attr
.use_assoc
)
14266 gfc_error ("Derived type %qs at %L has not been declared",
14267 sym
->name
, &sym
->declared_at
);
14271 /* Resolve the finalizer procedures. */
14272 if (!gfc_resolve_finalizers (sym
, NULL
))
14275 if (sym
->attr
.is_class
&& sym
->ts
.u
.derived
== NULL
)
14277 /* Fix up incomplete CLASS symbols. */
14278 gfc_component
*data
= gfc_find_component (sym
, "_data", true, true, NULL
);
14279 gfc_component
*vptr
= gfc_find_component (sym
, "_vptr", true, true, NULL
);
14281 /* Nothing more to do for unlimited polymorphic entities. */
14282 if (data
->ts
.u
.derived
->attr
.unlimited_polymorphic
)
14284 else if (vptr
->ts
.u
.derived
== NULL
)
14286 gfc_symbol
*vtab
= gfc_find_derived_vtab (data
->ts
.u
.derived
);
14288 vptr
->ts
.u
.derived
= vtab
->ts
.u
.derived
;
14289 if (!resolve_fl_derived0 (vptr
->ts
.u
.derived
))
14294 if (!resolve_fl_derived0 (sym
))
14297 /* Resolve the type-bound procedures. */
14298 if (!resolve_typebound_procedures (sym
))
14301 /* Generate module vtables subject to their accessibility and their not
14302 being vtables or pdt templates. If this is not done class declarations
14303 in external procedures wind up with their own version and so SELECT TYPE
14304 fails because the vptrs do not have the same address. */
14305 if (gfc_option
.allow_std
& GFC_STD_F2003
14306 && sym
->ns
->proc_name
14307 && sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
14308 && sym
->attr
.access
!= ACCESS_PRIVATE
14309 && !(sym
->attr
.use_assoc
|| sym
->attr
.vtype
|| sym
->attr
.pdt_template
))
14311 gfc_symbol
*vtab
= gfc_find_derived_vtab (sym
);
14312 gfc_set_sym_referenced (vtab
);
14320 resolve_fl_namelist (gfc_symbol
*sym
)
14325 for (nl
= sym
->namelist
; nl
; nl
= nl
->next
)
14327 /* Check again, the check in match only works if NAMELIST comes
14329 if (nl
->sym
->as
&& nl
->sym
->as
->type
== AS_ASSUMED_SIZE
)
14331 gfc_error ("Assumed size array %qs in namelist %qs at %L is not "
14332 "allowed", nl
->sym
->name
, sym
->name
, &sym
->declared_at
);
14336 if (nl
->sym
->as
&& nl
->sym
->as
->type
== AS_ASSUMED_SHAPE
14337 && !gfc_notify_std (GFC_STD_F2003
, "NAMELIST array object %qs "
14338 "with assumed shape in namelist %qs at %L",
14339 nl
->sym
->name
, sym
->name
, &sym
->declared_at
))
14342 if (is_non_constant_shape_array (nl
->sym
)
14343 && !gfc_notify_std (GFC_STD_F2003
, "NAMELIST array object %qs "
14344 "with nonconstant shape in namelist %qs at %L",
14345 nl
->sym
->name
, sym
->name
, &sym
->declared_at
))
14348 if (nl
->sym
->ts
.type
== BT_CHARACTER
14349 && (nl
->sym
->ts
.u
.cl
->length
== NULL
14350 || !gfc_is_constant_expr (nl
->sym
->ts
.u
.cl
->length
))
14351 && !gfc_notify_std (GFC_STD_F2003
, "NAMELIST object %qs with "
14352 "nonconstant character length in "
14353 "namelist %qs at %L", nl
->sym
->name
,
14354 sym
->name
, &sym
->declared_at
))
14359 /* Reject PRIVATE objects in a PUBLIC namelist. */
14360 if (gfc_check_symbol_access (sym
))
14362 for (nl
= sym
->namelist
; nl
; nl
= nl
->next
)
14364 if (!nl
->sym
->attr
.use_assoc
14365 && !is_sym_host_assoc (nl
->sym
, sym
->ns
)
14366 && !gfc_check_symbol_access (nl
->sym
))
14368 gfc_error ("NAMELIST object %qs was declared PRIVATE and "
14369 "cannot be member of PUBLIC namelist %qs at %L",
14370 nl
->sym
->name
, sym
->name
, &sym
->declared_at
);
14374 if (nl
->sym
->ts
.type
== BT_DERIVED
14375 && (nl
->sym
->ts
.u
.derived
->attr
.alloc_comp
14376 || nl
->sym
->ts
.u
.derived
->attr
.pointer_comp
))
14378 if (!gfc_notify_std (GFC_STD_F2003
, "NAMELIST object %qs in "
14379 "namelist %qs at %L with ALLOCATABLE "
14380 "or POINTER components", nl
->sym
->name
,
14381 sym
->name
, &sym
->declared_at
))
14386 /* Types with private components that came here by USE-association. */
14387 if (nl
->sym
->ts
.type
== BT_DERIVED
14388 && derived_inaccessible (nl
->sym
->ts
.u
.derived
))
14390 gfc_error ("NAMELIST object %qs has use-associated PRIVATE "
14391 "components and cannot be member of namelist %qs at %L",
14392 nl
->sym
->name
, sym
->name
, &sym
->declared_at
);
14396 /* Types with private components that are defined in the same module. */
14397 if (nl
->sym
->ts
.type
== BT_DERIVED
14398 && !is_sym_host_assoc (nl
->sym
->ts
.u
.derived
, sym
->ns
)
14399 && nl
->sym
->ts
.u
.derived
->attr
.private_comp
)
14401 gfc_error ("NAMELIST object %qs has PRIVATE components and "
14402 "cannot be a member of PUBLIC namelist %qs at %L",
14403 nl
->sym
->name
, sym
->name
, &sym
->declared_at
);
14410 /* 14.1.2 A module or internal procedure represent local entities
14411 of the same type as a namelist member and so are not allowed. */
14412 for (nl
= sym
->namelist
; nl
; nl
= nl
->next
)
14414 if (nl
->sym
->ts
.kind
!= 0 && nl
->sym
->attr
.flavor
== FL_VARIABLE
)
14417 if (nl
->sym
->attr
.function
&& nl
->sym
== nl
->sym
->result
)
14418 if ((nl
->sym
== sym
->ns
->proc_name
)
14420 (sym
->ns
->parent
&& nl
->sym
== sym
->ns
->parent
->proc_name
))
14425 gfc_find_symbol (nl
->sym
->name
, sym
->ns
, 1, &nlsym
);
14426 if (nlsym
&& nlsym
->attr
.flavor
== FL_PROCEDURE
)
14428 gfc_error ("PROCEDURE attribute conflicts with NAMELIST "
14429 "attribute in %qs at %L", nlsym
->name
,
14430 &sym
->declared_at
);
14437 for (nl
= sym
->namelist
; nl
; nl
= nl
->next
)
14438 nl
->sym
->attr
.asynchronous
= 1;
14445 resolve_fl_parameter (gfc_symbol
*sym
)
14447 /* A parameter array's shape needs to be constant. */
14448 if (sym
->as
!= NULL
14449 && (sym
->as
->type
== AS_DEFERRED
14450 || is_non_constant_shape_array (sym
)))
14452 gfc_error ("Parameter array %qs at %L cannot be automatic "
14453 "or of deferred shape", sym
->name
, &sym
->declared_at
);
14457 /* Constraints on deferred type parameter. */
14458 if (!deferred_requirements (sym
))
14461 /* Make sure a parameter that has been implicitly typed still
14462 matches the implicit type, since PARAMETER statements can precede
14463 IMPLICIT statements. */
14464 if (sym
->attr
.implicit_type
14465 && !gfc_compare_types (&sym
->ts
, gfc_get_default_type (sym
->name
,
14468 gfc_error ("Implicitly typed PARAMETER %qs at %L doesn't match a "
14469 "later IMPLICIT type", sym
->name
, &sym
->declared_at
);
14473 /* Make sure the types of derived parameters are consistent. This
14474 type checking is deferred until resolution because the type may
14475 refer to a derived type from the host. */
14476 if (sym
->ts
.type
== BT_DERIVED
14477 && !gfc_compare_types (&sym
->ts
, &sym
->value
->ts
))
14479 gfc_error ("Incompatible derived type in PARAMETER at %L",
14480 &sym
->value
->where
);
14484 /* F03:C509,C514. */
14485 if (sym
->ts
.type
== BT_CLASS
)
14487 gfc_error ("CLASS variable %qs at %L cannot have the PARAMETER attribute",
14488 sym
->name
, &sym
->declared_at
);
14496 /* Called by resolve_symbol to check PDTs. */
14499 resolve_pdt (gfc_symbol
* sym
)
14501 gfc_symbol
*derived
= NULL
;
14502 gfc_actual_arglist
*param
;
14504 bool const_len_exprs
= true;
14505 bool assumed_len_exprs
= false;
14506 symbol_attribute
*attr
;
14508 if (sym
->ts
.type
== BT_DERIVED
)
14510 derived
= sym
->ts
.u
.derived
;
14511 attr
= &(sym
->attr
);
14513 else if (sym
->ts
.type
== BT_CLASS
)
14515 derived
= CLASS_DATA (sym
)->ts
.u
.derived
;
14516 attr
= &(CLASS_DATA (sym
)->attr
);
14519 gcc_unreachable ();
14521 gcc_assert (derived
->attr
.pdt_type
);
14523 for (param
= sym
->param_list
; param
; param
= param
->next
)
14525 c
= gfc_find_component (derived
, param
->name
, false, true, NULL
);
14527 if (c
->attr
.pdt_kind
)
14530 if (param
->expr
&& !gfc_is_constant_expr (param
->expr
)
14531 && c
->attr
.pdt_len
)
14532 const_len_exprs
= false;
14533 else if (param
->spec_type
== SPEC_ASSUMED
)
14534 assumed_len_exprs
= true;
14536 if (param
->spec_type
== SPEC_DEFERRED
14537 && !attr
->allocatable
&& !attr
->pointer
)
14538 gfc_error ("The object %qs at %L has a deferred LEN "
14539 "parameter %qs and is neither allocatable "
14540 "nor a pointer", sym
->name
, &sym
->declared_at
,
14545 if (!const_len_exprs
14546 && (sym
->ns
->proc_name
->attr
.is_main_program
14547 || sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
14548 || sym
->attr
.save
!= SAVE_NONE
))
14549 gfc_error ("The AUTOMATIC object %qs at %L must not have the "
14550 "SAVE attribute or be a variable declared in the "
14551 "main program, a module or a submodule(F08/C513)",
14552 sym
->name
, &sym
->declared_at
);
14554 if (assumed_len_exprs
&& !(sym
->attr
.dummy
14555 || sym
->attr
.select_type_temporary
|| sym
->attr
.associate_var
))
14556 gfc_error ("The object %qs at %L with ASSUMED type parameters "
14557 "must be a dummy or a SELECT TYPE selector(F08/4.2)",
14558 sym
->name
, &sym
->declared_at
);
14562 /* Do anything necessary to resolve a symbol. Right now, we just
14563 assume that an otherwise unknown symbol is a variable. This sort
14564 of thing commonly happens for symbols in module. */
14567 resolve_symbol (gfc_symbol
*sym
)
14569 int check_constant
, mp_flag
;
14570 gfc_symtree
*symtree
;
14571 gfc_symtree
*this_symtree
;
14574 symbol_attribute class_attr
;
14575 gfc_array_spec
*as
;
14576 bool saved_specification_expr
;
14582 /* No symbol will ever have union type; only components can be unions.
14583 Union type declaration symbols have type BT_UNKNOWN but flavor FL_UNION
14584 (just like derived type declaration symbols have flavor FL_DERIVED). */
14585 gcc_assert (sym
->ts
.type
!= BT_UNION
);
14587 /* Coarrayed polymorphic objects with allocatable or pointer components are
14588 yet unsupported for -fcoarray=lib. */
14589 if (flag_coarray
== GFC_FCOARRAY_LIB
&& sym
->ts
.type
== BT_CLASS
14590 && sym
->ts
.u
.derived
&& CLASS_DATA (sym
)
14591 && CLASS_DATA (sym
)->attr
.codimension
14592 && (CLASS_DATA (sym
)->ts
.u
.derived
->attr
.alloc_comp
14593 || CLASS_DATA (sym
)->ts
.u
.derived
->attr
.pointer_comp
))
14595 gfc_error ("Sorry, allocatable/pointer components in polymorphic (CLASS) "
14596 "type coarrays at %L are unsupported", &sym
->declared_at
);
14600 if (sym
->attr
.artificial
)
14603 if (sym
->attr
.unlimited_polymorphic
)
14606 if (sym
->attr
.flavor
== FL_UNKNOWN
14607 || (sym
->attr
.flavor
== FL_PROCEDURE
&& !sym
->attr
.intrinsic
14608 && !sym
->attr
.generic
&& !sym
->attr
.external
14609 && sym
->attr
.if_source
== IFSRC_UNKNOWN
14610 && sym
->ts
.type
== BT_UNKNOWN
))
14613 /* If we find that a flavorless symbol is an interface in one of the
14614 parent namespaces, find its symtree in this namespace, free the
14615 symbol and set the symtree to point to the interface symbol. */
14616 for (ns
= gfc_current_ns
->parent
; ns
; ns
= ns
->parent
)
14618 symtree
= gfc_find_symtree (ns
->sym_root
, sym
->name
);
14619 if (symtree
&& (symtree
->n
.sym
->generic
||
14620 (symtree
->n
.sym
->attr
.flavor
== FL_PROCEDURE
14621 && sym
->ns
->construct_entities
)))
14623 this_symtree
= gfc_find_symtree (gfc_current_ns
->sym_root
,
14625 if (this_symtree
->n
.sym
== sym
)
14627 symtree
->n
.sym
->refs
++;
14628 gfc_release_symbol (sym
);
14629 this_symtree
->n
.sym
= symtree
->n
.sym
;
14635 /* Otherwise give it a flavor according to such attributes as
14637 if (sym
->attr
.flavor
== FL_UNKNOWN
&& sym
->attr
.external
== 0
14638 && sym
->attr
.intrinsic
== 0)
14639 sym
->attr
.flavor
= FL_VARIABLE
;
14640 else if (sym
->attr
.flavor
== FL_UNKNOWN
)
14642 sym
->attr
.flavor
= FL_PROCEDURE
;
14643 if (sym
->attr
.dimension
)
14644 sym
->attr
.function
= 1;
14648 if (sym
->attr
.external
&& sym
->ts
.type
!= BT_UNKNOWN
&& !sym
->attr
.function
)
14649 gfc_add_function (&sym
->attr
, sym
->name
, &sym
->declared_at
);
14651 if (sym
->attr
.procedure
&& sym
->attr
.if_source
!= IFSRC_DECL
14652 && !resolve_procedure_interface (sym
))
14655 if (sym
->attr
.is_protected
&& !sym
->attr
.proc_pointer
14656 && (sym
->attr
.procedure
|| sym
->attr
.external
))
14658 if (sym
->attr
.external
)
14659 gfc_error ("PROTECTED attribute conflicts with EXTERNAL attribute "
14660 "at %L", &sym
->declared_at
);
14662 gfc_error ("PROCEDURE attribute conflicts with PROTECTED attribute "
14663 "at %L", &sym
->declared_at
);
14668 if (sym
->attr
.flavor
== FL_DERIVED
&& !resolve_fl_derived (sym
))
14671 else if ((sym
->attr
.flavor
== FL_STRUCT
|| sym
->attr
.flavor
== FL_UNION
)
14672 && !resolve_fl_struct (sym
))
14675 /* Symbols that are module procedures with results (functions) have
14676 the types and array specification copied for type checking in
14677 procedures that call them, as well as for saving to a module
14678 file. These symbols can't stand the scrutiny that their results
14680 mp_flag
= (sym
->result
!= NULL
&& sym
->result
!= sym
);
14682 /* Make sure that the intrinsic is consistent with its internal
14683 representation. This needs to be done before assigning a default
14684 type to avoid spurious warnings. */
14685 if (sym
->attr
.flavor
!= FL_MODULE
&& sym
->attr
.intrinsic
14686 && !gfc_resolve_intrinsic (sym
, &sym
->declared_at
))
14689 /* Resolve associate names. */
14691 resolve_assoc_var (sym
, true);
14693 /* Assign default type to symbols that need one and don't have one. */
14694 if (sym
->ts
.type
== BT_UNKNOWN
)
14696 if (sym
->attr
.flavor
== FL_VARIABLE
|| sym
->attr
.flavor
== FL_PARAMETER
)
14698 gfc_set_default_type (sym
, 1, NULL
);
14701 if (sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.external
14702 && !sym
->attr
.function
&& !sym
->attr
.subroutine
14703 && gfc_get_default_type (sym
->name
, sym
->ns
)->type
== BT_UNKNOWN
)
14704 gfc_add_subroutine (&sym
->attr
, sym
->name
, &sym
->declared_at
);
14706 if (sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.function
)
14708 /* The specific case of an external procedure should emit an error
14709 in the case that there is no implicit type. */
14712 if (!sym
->attr
.mixed_entry_master
)
14713 gfc_set_default_type (sym
, sym
->attr
.external
, NULL
);
14717 /* Result may be in another namespace. */
14718 resolve_symbol (sym
->result
);
14720 if (!sym
->result
->attr
.proc_pointer
)
14722 sym
->ts
= sym
->result
->ts
;
14723 sym
->as
= gfc_copy_array_spec (sym
->result
->as
);
14724 sym
->attr
.dimension
= sym
->result
->attr
.dimension
;
14725 sym
->attr
.pointer
= sym
->result
->attr
.pointer
;
14726 sym
->attr
.allocatable
= sym
->result
->attr
.allocatable
;
14727 sym
->attr
.contiguous
= sym
->result
->attr
.contiguous
;
14732 else if (mp_flag
&& sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.function
)
14734 bool saved_specification_expr
= specification_expr
;
14735 specification_expr
= true;
14736 gfc_resolve_array_spec (sym
->result
->as
, false);
14737 specification_expr
= saved_specification_expr
;
14740 if (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
)
14742 as
= CLASS_DATA (sym
)->as
;
14743 class_attr
= CLASS_DATA (sym
)->attr
;
14744 class_attr
.pointer
= class_attr
.class_pointer
;
14748 class_attr
= sym
->attr
;
14753 if (sym
->attr
.contiguous
14754 && (!class_attr
.dimension
14755 || (as
->type
!= AS_ASSUMED_SHAPE
&& as
->type
!= AS_ASSUMED_RANK
14756 && !class_attr
.pointer
)))
14758 gfc_error ("%qs at %L has the CONTIGUOUS attribute but is not an "
14759 "array pointer or an assumed-shape or assumed-rank array",
14760 sym
->name
, &sym
->declared_at
);
14764 /* Assumed size arrays and assumed shape arrays must be dummy
14765 arguments. Array-spec's of implied-shape should have been resolved to
14766 AS_EXPLICIT already. */
14770 /* If AS_IMPLIED_SHAPE makes it to here, it must be a bad
14771 specification expression. */
14772 if (as
->type
== AS_IMPLIED_SHAPE
)
14775 for (i
=0; i
<as
->rank
; i
++)
14777 if (as
->lower
[i
] != NULL
&& as
->upper
[i
] == NULL
)
14779 gfc_error ("Bad specification for assumed size array at %L",
14780 &as
->lower
[i
]->where
);
14787 if (((as
->type
== AS_ASSUMED_SIZE
&& !as
->cp_was_assumed
)
14788 || as
->type
== AS_ASSUMED_SHAPE
)
14789 && !sym
->attr
.dummy
&& !sym
->attr
.select_type_temporary
)
14791 if (as
->type
== AS_ASSUMED_SIZE
)
14792 gfc_error ("Assumed size array at %L must be a dummy argument",
14793 &sym
->declared_at
);
14795 gfc_error ("Assumed shape array at %L must be a dummy argument",
14796 &sym
->declared_at
);
14799 /* TS 29113, C535a. */
14800 if (as
->type
== AS_ASSUMED_RANK
&& !sym
->attr
.dummy
14801 && !sym
->attr
.select_type_temporary
)
14803 gfc_error ("Assumed-rank array at %L must be a dummy argument",
14804 &sym
->declared_at
);
14807 if (as
->type
== AS_ASSUMED_RANK
14808 && (sym
->attr
.codimension
|| sym
->attr
.value
))
14810 gfc_error ("Assumed-rank array at %L may not have the VALUE or "
14811 "CODIMENSION attribute", &sym
->declared_at
);
14816 /* Make sure symbols with known intent or optional are really dummy
14817 variable. Because of ENTRY statement, this has to be deferred
14818 until resolution time. */
14820 if (!sym
->attr
.dummy
14821 && (sym
->attr
.optional
|| sym
->attr
.intent
!= INTENT_UNKNOWN
))
14823 gfc_error ("Symbol at %L is not a DUMMY variable", &sym
->declared_at
);
14827 if (sym
->attr
.value
&& !sym
->attr
.dummy
)
14829 gfc_error ("%qs at %L cannot have the VALUE attribute because "
14830 "it is not a dummy argument", sym
->name
, &sym
->declared_at
);
14834 if (sym
->attr
.value
&& sym
->ts
.type
== BT_CHARACTER
)
14836 gfc_charlen
*cl
= sym
->ts
.u
.cl
;
14837 if (!cl
|| !cl
->length
|| cl
->length
->expr_type
!= EXPR_CONSTANT
)
14839 gfc_error ("Character dummy variable %qs at %L with VALUE "
14840 "attribute must have constant length",
14841 sym
->name
, &sym
->declared_at
);
14845 if (sym
->ts
.is_c_interop
14846 && mpz_cmp_si (cl
->length
->value
.integer
, 1) != 0)
14848 gfc_error ("C interoperable character dummy variable %qs at %L "
14849 "with VALUE attribute must have length one",
14850 sym
->name
, &sym
->declared_at
);
14855 if (sym
->ts
.type
== BT_DERIVED
&& !sym
->attr
.is_iso_c
14856 && sym
->ts
.u
.derived
->attr
.generic
)
14858 sym
->ts
.u
.derived
= gfc_find_dt_in_generic (sym
->ts
.u
.derived
);
14859 if (!sym
->ts
.u
.derived
)
14861 gfc_error ("The derived type %qs at %L is of type %qs, "
14862 "which has not been defined", sym
->name
,
14863 &sym
->declared_at
, sym
->ts
.u
.derived
->name
);
14864 sym
->ts
.type
= BT_UNKNOWN
;
14869 /* Use the same constraints as TYPE(*), except for the type check
14870 and that only scalars and assumed-size arrays are permitted. */
14871 if (sym
->attr
.ext_attr
& (1 << EXT_ATTR_NO_ARG_CHECK
))
14873 if (!sym
->attr
.dummy
)
14875 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute shall be "
14876 "a dummy argument", sym
->name
, &sym
->declared_at
);
14880 if (sym
->ts
.type
!= BT_ASSUMED
&& sym
->ts
.type
!= BT_INTEGER
14881 && sym
->ts
.type
!= BT_REAL
&& sym
->ts
.type
!= BT_LOGICAL
14882 && sym
->ts
.type
!= BT_COMPLEX
)
14884 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute shall be "
14885 "of type TYPE(*) or of an numeric intrinsic type",
14886 sym
->name
, &sym
->declared_at
);
14890 if (sym
->attr
.allocatable
|| sym
->attr
.codimension
14891 || sym
->attr
.pointer
|| sym
->attr
.value
)
14893 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute may not "
14894 "have the ALLOCATABLE, CODIMENSION, POINTER or VALUE "
14895 "attribute", sym
->name
, &sym
->declared_at
);
14899 if (sym
->attr
.intent
== INTENT_OUT
)
14901 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute may not "
14902 "have the INTENT(OUT) attribute",
14903 sym
->name
, &sym
->declared_at
);
14906 if (sym
->attr
.dimension
&& sym
->as
->type
!= AS_ASSUMED_SIZE
)
14908 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute shall "
14909 "either be a scalar or an assumed-size array",
14910 sym
->name
, &sym
->declared_at
);
14914 /* Set the type to TYPE(*) and add a dimension(*) to ensure
14915 NO_ARG_CHECK is correctly handled in trans*.c, e.g. with
14917 sym
->ts
.type
= BT_ASSUMED
;
14918 sym
->as
= gfc_get_array_spec ();
14919 sym
->as
->type
= AS_ASSUMED_SIZE
;
14921 sym
->as
->lower
[0] = gfc_get_int_expr (gfc_default_integer_kind
, NULL
, 1);
14923 else if (sym
->ts
.type
== BT_ASSUMED
)
14925 /* TS 29113, C407a. */
14926 if (!sym
->attr
.dummy
)
14928 gfc_error ("Assumed type of variable %s at %L is only permitted "
14929 "for dummy variables", sym
->name
, &sym
->declared_at
);
14932 if (sym
->attr
.allocatable
|| sym
->attr
.codimension
14933 || sym
->attr
.pointer
|| sym
->attr
.value
)
14935 gfc_error ("Assumed-type variable %s at %L may not have the "
14936 "ALLOCATABLE, CODIMENSION, POINTER or VALUE attribute",
14937 sym
->name
, &sym
->declared_at
);
14940 if (sym
->attr
.intent
== INTENT_OUT
)
14942 gfc_error ("Assumed-type variable %s at %L may not have the "
14943 "INTENT(OUT) attribute",
14944 sym
->name
, &sym
->declared_at
);
14947 if (sym
->attr
.dimension
&& sym
->as
->type
== AS_EXPLICIT
)
14949 gfc_error ("Assumed-type variable %s at %L shall not be an "
14950 "explicit-shape array", sym
->name
, &sym
->declared_at
);
14955 /* If the symbol is marked as bind(c), that it is declared at module level
14956 scope and verify its type and kind. Do not do the latter for symbols
14957 that are implicitly typed because that is handled in
14958 gfc_set_default_type. Handle dummy arguments and procedure definitions
14959 separately. Also, anything that is use associated is not handled here
14960 but instead is handled in the module it is declared in. Finally, derived
14961 type definitions are allowed to be BIND(C) since that only implies that
14962 they're interoperable, and they are checked fully for interoperability
14963 when a variable is declared of that type. */
14964 if (sym
->attr
.is_bind_c
&& sym
->attr
.use_assoc
== 0
14965 && sym
->attr
.dummy
== 0 && sym
->attr
.flavor
!= FL_PROCEDURE
14966 && sym
->attr
.flavor
!= FL_DERIVED
)
14970 /* First, make sure the variable is declared at the
14971 module-level scope (J3/04-007, Section 15.3). */
14972 if (sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
&&
14973 sym
->attr
.in_common
== 0)
14975 gfc_error ("Variable %qs at %L cannot be BIND(C) because it "
14976 "is neither a COMMON block nor declared at the "
14977 "module level scope", sym
->name
, &(sym
->declared_at
));
14980 else if (sym
->ts
.type
== BT_CHARACTER
14981 && (sym
->ts
.u
.cl
== NULL
|| sym
->ts
.u
.cl
->length
== NULL
14982 || !gfc_is_constant_expr (sym
->ts
.u
.cl
->length
)
14983 || mpz_cmp_si (sym
->ts
.u
.cl
->length
->value
.integer
, 1) != 0))
14985 gfc_error ("BIND(C) Variable %qs at %L must have length one",
14986 sym
->name
, &sym
->declared_at
);
14989 else if (sym
->common_head
!= NULL
&& sym
->attr
.implicit_type
== 0)
14991 t
= verify_com_block_vars_c_interop (sym
->common_head
);
14993 else if (sym
->attr
.implicit_type
== 0)
14995 /* If type() declaration, we need to verify that the components
14996 of the given type are all C interoperable, etc. */
14997 if (sym
->ts
.type
== BT_DERIVED
&&
14998 sym
->ts
.u
.derived
->attr
.is_c_interop
!= 1)
15000 /* Make sure the user marked the derived type as BIND(C). If
15001 not, call the verify routine. This could print an error
15002 for the derived type more than once if multiple variables
15003 of that type are declared. */
15004 if (sym
->ts
.u
.derived
->attr
.is_bind_c
!= 1)
15005 verify_bind_c_derived_type (sym
->ts
.u
.derived
);
15009 /* Verify the variable itself as C interoperable if it
15010 is BIND(C). It is not possible for this to succeed if
15011 the verify_bind_c_derived_type failed, so don't have to handle
15012 any error returned by verify_bind_c_derived_type. */
15013 t
= verify_bind_c_sym (sym
, &(sym
->ts
), sym
->attr
.in_common
,
15014 sym
->common_block
);
15019 /* clear the is_bind_c flag to prevent reporting errors more than
15020 once if something failed. */
15021 sym
->attr
.is_bind_c
= 0;
15026 /* If a derived type symbol has reached this point, without its
15027 type being declared, we have an error. Notice that most
15028 conditions that produce undefined derived types have already
15029 been dealt with. However, the likes of:
15030 implicit type(t) (t) ..... call foo (t) will get us here if
15031 the type is not declared in the scope of the implicit
15032 statement. Change the type to BT_UNKNOWN, both because it is so
15033 and to prevent an ICE. */
15034 if (sym
->ts
.type
== BT_DERIVED
&& !sym
->attr
.is_iso_c
15035 && sym
->ts
.u
.derived
->components
== NULL
15036 && !sym
->ts
.u
.derived
->attr
.zero_comp
)
15038 gfc_error ("The derived type %qs at %L is of type %qs, "
15039 "which has not been defined", sym
->name
,
15040 &sym
->declared_at
, sym
->ts
.u
.derived
->name
);
15041 sym
->ts
.type
= BT_UNKNOWN
;
15045 /* Make sure that the derived type has been resolved and that the
15046 derived type is visible in the symbol's namespace, if it is a
15047 module function and is not PRIVATE. */
15048 if (sym
->ts
.type
== BT_DERIVED
15049 && sym
->ts
.u
.derived
->attr
.use_assoc
15050 && sym
->ns
->proc_name
15051 && sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
15052 && !resolve_fl_derived (sym
->ts
.u
.derived
))
15055 /* Unless the derived-type declaration is use associated, Fortran 95
15056 does not allow public entries of private derived types.
15057 See 4.4.1 (F95) and 4.5.1.1 (F2003); and related interpretation
15058 161 in 95-006r3. */
15059 if (sym
->ts
.type
== BT_DERIVED
15060 && sym
->ns
->proc_name
&& sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
15061 && !sym
->ts
.u
.derived
->attr
.use_assoc
15062 && gfc_check_symbol_access (sym
)
15063 && !gfc_check_symbol_access (sym
->ts
.u
.derived
)
15064 && !gfc_notify_std (GFC_STD_F2003
, "PUBLIC %s %qs at %L of PRIVATE "
15065 "derived type %qs",
15066 (sym
->attr
.flavor
== FL_PARAMETER
)
15067 ? "parameter" : "variable",
15068 sym
->name
, &sym
->declared_at
,
15069 sym
->ts
.u
.derived
->name
))
15072 /* F2008, C1302. */
15073 if (sym
->ts
.type
== BT_DERIVED
15074 && ((sym
->ts
.u
.derived
->from_intmod
== INTMOD_ISO_FORTRAN_ENV
15075 && sym
->ts
.u
.derived
->intmod_sym_id
== ISOFORTRAN_LOCK_TYPE
)
15076 || sym
->ts
.u
.derived
->attr
.lock_comp
)
15077 && !sym
->attr
.codimension
&& !sym
->ts
.u
.derived
->attr
.coarray_comp
)
15079 gfc_error ("Variable %s at %L of type LOCK_TYPE or with subcomponent of "
15080 "type LOCK_TYPE must be a coarray", sym
->name
,
15081 &sym
->declared_at
);
15085 /* TS18508, C702/C703. */
15086 if (sym
->ts
.type
== BT_DERIVED
15087 && ((sym
->ts
.u
.derived
->from_intmod
== INTMOD_ISO_FORTRAN_ENV
15088 && sym
->ts
.u
.derived
->intmod_sym_id
== ISOFORTRAN_EVENT_TYPE
)
15089 || sym
->ts
.u
.derived
->attr
.event_comp
)
15090 && !sym
->attr
.codimension
&& !sym
->ts
.u
.derived
->attr
.coarray_comp
)
15092 gfc_error ("Variable %s at %L of type EVENT_TYPE or with subcomponent of "
15093 "type EVENT_TYPE must be a coarray", sym
->name
,
15094 &sym
->declared_at
);
15098 /* An assumed-size array with INTENT(OUT) shall not be of a type for which
15099 default initialization is defined (5.1.2.4.4). */
15100 if (sym
->ts
.type
== BT_DERIVED
15102 && sym
->attr
.intent
== INTENT_OUT
15104 && sym
->as
->type
== AS_ASSUMED_SIZE
)
15106 for (c
= sym
->ts
.u
.derived
->components
; c
; c
= c
->next
)
15108 if (c
->initializer
)
15110 gfc_error ("The INTENT(OUT) dummy argument %qs at %L is "
15111 "ASSUMED SIZE and so cannot have a default initializer",
15112 sym
->name
, &sym
->declared_at
);
15119 if (sym
->ts
.type
== BT_DERIVED
&& sym
->attr
.dummy
15120 && sym
->attr
.intent
== INTENT_OUT
&& sym
->attr
.lock_comp
)
15122 gfc_error ("Dummy argument %qs at %L of LOCK_TYPE shall not be "
15123 "INTENT(OUT)", sym
->name
, &sym
->declared_at
);
15128 if (sym
->ts
.type
== BT_DERIVED
&& sym
->attr
.dummy
15129 && sym
->attr
.intent
== INTENT_OUT
&& sym
->attr
.event_comp
)
15131 gfc_error ("Dummy argument %qs at %L of EVENT_TYPE shall not be "
15132 "INTENT(OUT)", sym
->name
, &sym
->declared_at
);
15137 if ((((sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
->attr
.coarray_comp
)
15138 || (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
15139 && CLASS_DATA (sym
)->attr
.coarray_comp
))
15140 || class_attr
.codimension
)
15141 && (sym
->attr
.result
|| sym
->result
== sym
))
15143 gfc_error ("Function result %qs at %L shall not be a coarray or have "
15144 "a coarray component", sym
->name
, &sym
->declared_at
);
15149 if (sym
->attr
.codimension
&& sym
->ts
.type
== BT_DERIVED
15150 && sym
->ts
.u
.derived
->ts
.is_iso_c
)
15152 gfc_error ("Variable %qs at %L of TYPE(C_PTR) or TYPE(C_FUNPTR) "
15153 "shall not be a coarray", sym
->name
, &sym
->declared_at
);
15158 if (((sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
->attr
.coarray_comp
)
15159 || (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
15160 && CLASS_DATA (sym
)->attr
.coarray_comp
))
15161 && (class_attr
.codimension
|| class_attr
.pointer
|| class_attr
.dimension
15162 || class_attr
.allocatable
))
15164 gfc_error ("Variable %qs at %L with coarray component shall be a "
15165 "nonpointer, nonallocatable scalar, which is not a coarray",
15166 sym
->name
, &sym
->declared_at
);
15170 /* F2008, C526. The function-result case was handled above. */
15171 if (class_attr
.codimension
15172 && !(class_attr
.allocatable
|| sym
->attr
.dummy
|| sym
->attr
.save
15173 || sym
->attr
.select_type_temporary
15174 || sym
->attr
.associate_var
15175 || (sym
->ns
->save_all
&& !sym
->attr
.automatic
)
15176 || sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
15177 || sym
->ns
->proc_name
->attr
.is_main_program
15178 || sym
->attr
.function
|| sym
->attr
.result
|| sym
->attr
.use_assoc
))
15180 gfc_error ("Variable %qs at %L is a coarray and is not ALLOCATABLE, SAVE "
15181 "nor a dummy argument", sym
->name
, &sym
->declared_at
);
15185 else if (class_attr
.codimension
&& !sym
->attr
.select_type_temporary
15186 && !class_attr
.allocatable
&& as
&& as
->cotype
== AS_DEFERRED
)
15188 gfc_error ("Coarray variable %qs at %L shall not have codimensions with "
15189 "deferred shape", sym
->name
, &sym
->declared_at
);
15192 else if (class_attr
.codimension
&& class_attr
.allocatable
&& as
15193 && (as
->cotype
!= AS_DEFERRED
|| as
->type
!= AS_DEFERRED
))
15195 gfc_error ("Allocatable coarray variable %qs at %L must have "
15196 "deferred shape", sym
->name
, &sym
->declared_at
);
15201 if ((((sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
->attr
.coarray_comp
)
15202 || (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
15203 && CLASS_DATA (sym
)->attr
.coarray_comp
))
15204 || (class_attr
.codimension
&& class_attr
.allocatable
))
15205 && sym
->attr
.dummy
&& sym
->attr
.intent
== INTENT_OUT
)
15207 gfc_error ("Variable %qs at %L is INTENT(OUT) and can thus not be an "
15208 "allocatable coarray or have coarray components",
15209 sym
->name
, &sym
->declared_at
);
15213 if (class_attr
.codimension
&& sym
->attr
.dummy
15214 && sym
->ns
->proc_name
&& sym
->ns
->proc_name
->attr
.is_bind_c
)
15216 gfc_error ("Coarray dummy variable %qs at %L not allowed in BIND(C) "
15217 "procedure %qs", sym
->name
, &sym
->declared_at
,
15218 sym
->ns
->proc_name
->name
);
15222 if (sym
->ts
.type
== BT_LOGICAL
15223 && ((sym
->attr
.function
&& sym
->attr
.is_bind_c
&& sym
->result
== sym
)
15224 || ((sym
->attr
.dummy
|| sym
->attr
.result
) && sym
->ns
->proc_name
15225 && sym
->ns
->proc_name
->attr
.is_bind_c
)))
15228 for (i
= 0; gfc_logical_kinds
[i
].kind
; i
++)
15229 if (gfc_logical_kinds
[i
].kind
== sym
->ts
.kind
)
15231 if (!gfc_logical_kinds
[i
].c_bool
&& sym
->attr
.dummy
15232 && !gfc_notify_std (GFC_STD_GNU
, "LOGICAL dummy argument %qs at "
15233 "%L with non-C_Bool kind in BIND(C) procedure "
15234 "%qs", sym
->name
, &sym
->declared_at
,
15235 sym
->ns
->proc_name
->name
))
15237 else if (!gfc_logical_kinds
[i
].c_bool
15238 && !gfc_notify_std (GFC_STD_GNU
, "LOGICAL result variable "
15239 "%qs at %L with non-C_Bool kind in "
15240 "BIND(C) procedure %qs", sym
->name
,
15242 sym
->attr
.function
? sym
->name
15243 : sym
->ns
->proc_name
->name
))
15247 switch (sym
->attr
.flavor
)
15250 if (!resolve_fl_variable (sym
, mp_flag
))
15255 if (sym
->formal
&& !sym
->formal_ns
)
15257 /* Check that none of the arguments are a namelist. */
15258 gfc_formal_arglist
*formal
= sym
->formal
;
15260 for (; formal
; formal
= formal
->next
)
15261 if (formal
->sym
&& formal
->sym
->attr
.flavor
== FL_NAMELIST
)
15263 gfc_error ("Namelist %qs can not be an argument to "
15264 "subroutine or function at %L",
15265 formal
->sym
->name
, &sym
->declared_at
);
15270 if (!resolve_fl_procedure (sym
, mp_flag
))
15275 if (!resolve_fl_namelist (sym
))
15280 if (!resolve_fl_parameter (sym
))
15288 /* Resolve array specifier. Check as well some constraints
15289 on COMMON blocks. */
15291 check_constant
= sym
->attr
.in_common
&& !sym
->attr
.pointer
;
15293 /* Set the formal_arg_flag so that check_conflict will not throw
15294 an error for host associated variables in the specification
15295 expression for an array_valued function. */
15296 if (sym
->attr
.function
&& sym
->as
)
15297 formal_arg_flag
= true;
15299 saved_specification_expr
= specification_expr
;
15300 specification_expr
= true;
15301 gfc_resolve_array_spec (sym
->as
, check_constant
);
15302 specification_expr
= saved_specification_expr
;
15304 formal_arg_flag
= false;
15306 /* Resolve formal namespaces. */
15307 if (sym
->formal_ns
&& sym
->formal_ns
!= gfc_current_ns
15308 && !sym
->attr
.contained
&& !sym
->attr
.intrinsic
)
15309 gfc_resolve (sym
->formal_ns
);
15311 /* Make sure the formal namespace is present. */
15312 if (sym
->formal
&& !sym
->formal_ns
)
15314 gfc_formal_arglist
*formal
= sym
->formal
;
15315 while (formal
&& !formal
->sym
)
15316 formal
= formal
->next
;
15320 sym
->formal_ns
= formal
->sym
->ns
;
15321 if (sym
->ns
!= formal
->sym
->ns
)
15322 sym
->formal_ns
->refs
++;
15326 /* Check threadprivate restrictions. */
15327 if (sym
->attr
.threadprivate
&& !sym
->attr
.save
15328 && !(sym
->ns
->save_all
&& !sym
->attr
.automatic
)
15329 && (!sym
->attr
.in_common
15330 && sym
->module
== NULL
15331 && (sym
->ns
->proc_name
== NULL
15332 || sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
)))
15333 gfc_error ("Threadprivate at %L isn't SAVEd", &sym
->declared_at
);
15335 /* Check omp declare target restrictions. */
15336 if (sym
->attr
.omp_declare_target
15337 && sym
->attr
.flavor
== FL_VARIABLE
15339 && !(sym
->ns
->save_all
&& !sym
->attr
.automatic
)
15340 && (!sym
->attr
.in_common
15341 && sym
->module
== NULL
15342 && (sym
->ns
->proc_name
== NULL
15343 || sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
)))
15344 gfc_error ("!$OMP DECLARE TARGET variable %qs at %L isn't SAVEd",
15345 sym
->name
, &sym
->declared_at
);
15347 /* If we have come this far we can apply default-initializers, as
15348 described in 14.7.5, to those variables that have not already
15349 been assigned one. */
15350 if (sym
->ts
.type
== BT_DERIVED
15352 && !sym
->attr
.allocatable
15353 && !sym
->attr
.alloc_comp
)
15355 symbol_attribute
*a
= &sym
->attr
;
15357 if ((!a
->save
&& !a
->dummy
&& !a
->pointer
15358 && !a
->in_common
&& !a
->use_assoc
15360 && !((a
->function
|| a
->result
)
15362 || sym
->ts
.u
.derived
->attr
.alloc_comp
15363 || sym
->ts
.u
.derived
->attr
.pointer_comp
))
15364 && !(a
->function
&& sym
!= sym
->result
))
15365 || (a
->dummy
&& a
->intent
== INTENT_OUT
&& !a
->pointer
))
15366 apply_default_init (sym
);
15367 else if (a
->function
&& sym
->result
&& a
->access
!= ACCESS_PRIVATE
15368 && (sym
->ts
.u
.derived
->attr
.alloc_comp
15369 || sym
->ts
.u
.derived
->attr
.pointer_comp
))
15370 /* Mark the result symbol to be referenced, when it has allocatable
15372 sym
->result
->attr
.referenced
= 1;
15375 if (sym
->ts
.type
== BT_CLASS
&& sym
->ns
== gfc_current_ns
15376 && sym
->attr
.dummy
&& sym
->attr
.intent
== INTENT_OUT
15377 && !CLASS_DATA (sym
)->attr
.class_pointer
15378 && !CLASS_DATA (sym
)->attr
.allocatable
)
15379 apply_default_init (sym
);
15381 /* If this symbol has a type-spec, check it. */
15382 if (sym
->attr
.flavor
== FL_VARIABLE
|| sym
->attr
.flavor
== FL_PARAMETER
15383 || (sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.function
))
15384 if (!resolve_typespec_used (&sym
->ts
, &sym
->declared_at
, sym
->name
))
15387 if (sym
->param_list
)
15392 /************* Resolve DATA statements *************/
15396 gfc_data_value
*vnode
;
15402 /* Advance the values structure to point to the next value in the data list. */
15405 next_data_value (void)
15407 while (mpz_cmp_ui (values
.left
, 0) == 0)
15410 if (values
.vnode
->next
== NULL
)
15413 values
.vnode
= values
.vnode
->next
;
15414 mpz_set (values
.left
, values
.vnode
->repeat
);
15422 check_data_variable (gfc_data_variable
*var
, locus
*where
)
15428 ar_type mark
= AR_UNKNOWN
;
15430 mpz_t section_index
[GFC_MAX_DIMENSIONS
];
15436 if (!gfc_resolve_expr (var
->expr
))
15440 mpz_init_set_si (offset
, 0);
15443 if (e
->expr_type
== EXPR_FUNCTION
&& e
->value
.function
.isym
15444 && e
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
)
15445 e
= e
->value
.function
.actual
->expr
;
15447 if (e
->expr_type
!= EXPR_VARIABLE
)
15448 gfc_internal_error ("check_data_variable(): Bad expression");
15450 sym
= e
->symtree
->n
.sym
;
15452 if (sym
->ns
->is_block_data
&& !sym
->attr
.in_common
)
15454 gfc_error ("BLOCK DATA element %qs at %L must be in COMMON",
15455 sym
->name
, &sym
->declared_at
);
15458 if (e
->ref
== NULL
&& sym
->as
)
15460 gfc_error ("DATA array %qs at %L must be specified in a previous"
15461 " declaration", sym
->name
, where
);
15465 has_pointer
= sym
->attr
.pointer
;
15467 if (gfc_is_coindexed (e
))
15469 gfc_error ("DATA element %qs at %L cannot have a coindex", sym
->name
,
15474 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
15476 if (ref
->type
== REF_COMPONENT
&& ref
->u
.c
.component
->attr
.pointer
)
15480 && ref
->type
== REF_ARRAY
15481 && ref
->u
.ar
.type
!= AR_FULL
)
15483 gfc_error ("DATA element %qs at %L is a pointer and so must "
15484 "be a full array", sym
->name
, where
);
15489 if (e
->rank
== 0 || has_pointer
)
15491 mpz_init_set_ui (size
, 1);
15498 /* Find the array section reference. */
15499 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
15501 if (ref
->type
!= REF_ARRAY
)
15503 if (ref
->u
.ar
.type
== AR_ELEMENT
)
15509 /* Set marks according to the reference pattern. */
15510 switch (ref
->u
.ar
.type
)
15518 /* Get the start position of array section. */
15519 gfc_get_section_index (ar
, section_index
, &offset
);
15524 gcc_unreachable ();
15527 if (!gfc_array_size (e
, &size
))
15529 gfc_error ("Nonconstant array section at %L in DATA statement",
15531 mpz_clear (offset
);
15538 while (mpz_cmp_ui (size
, 0) > 0)
15540 if (!next_data_value ())
15542 gfc_error ("DATA statement at %L has more variables than values",
15548 t
= gfc_check_assign (var
->expr
, values
.vnode
->expr
, 0);
15552 /* If we have more than one element left in the repeat count,
15553 and we have more than one element left in the target variable,
15554 then create a range assignment. */
15555 /* FIXME: Only done for full arrays for now, since array sections
15557 if (mark
== AR_FULL
&& ref
&& ref
->next
== NULL
15558 && mpz_cmp_ui (values
.left
, 1) > 0 && mpz_cmp_ui (size
, 1) > 0)
15562 if (mpz_cmp (size
, values
.left
) >= 0)
15564 mpz_init_set (range
, values
.left
);
15565 mpz_sub (size
, size
, values
.left
);
15566 mpz_set_ui (values
.left
, 0);
15570 mpz_init_set (range
, size
);
15571 mpz_sub (values
.left
, values
.left
, size
);
15572 mpz_set_ui (size
, 0);
15575 t
= gfc_assign_data_value (var
->expr
, values
.vnode
->expr
,
15578 mpz_add (offset
, offset
, range
);
15585 /* Assign initial value to symbol. */
15588 mpz_sub_ui (values
.left
, values
.left
, 1);
15589 mpz_sub_ui (size
, size
, 1);
15591 t
= gfc_assign_data_value (var
->expr
, values
.vnode
->expr
,
15596 if (mark
== AR_FULL
)
15597 mpz_add_ui (offset
, offset
, 1);
15599 /* Modify the array section indexes and recalculate the offset
15600 for next element. */
15601 else if (mark
== AR_SECTION
)
15602 gfc_advance_section (section_index
, ar
, &offset
);
15606 if (mark
== AR_SECTION
)
15608 for (i
= 0; i
< ar
->dimen
; i
++)
15609 mpz_clear (section_index
[i
]);
15613 mpz_clear (offset
);
15619 static bool traverse_data_var (gfc_data_variable
*, locus
*);
15621 /* Iterate over a list of elements in a DATA statement. */
15624 traverse_data_list (gfc_data_variable
*var
, locus
*where
)
15627 iterator_stack frame
;
15628 gfc_expr
*e
, *start
, *end
, *step
;
15629 bool retval
= true;
15631 mpz_init (frame
.value
);
15634 start
= gfc_copy_expr (var
->iter
.start
);
15635 end
= gfc_copy_expr (var
->iter
.end
);
15636 step
= gfc_copy_expr (var
->iter
.step
);
15638 if (!gfc_simplify_expr (start
, 1)
15639 || start
->expr_type
!= EXPR_CONSTANT
)
15641 gfc_error ("start of implied-do loop at %L could not be "
15642 "simplified to a constant value", &start
->where
);
15646 if (!gfc_simplify_expr (end
, 1)
15647 || end
->expr_type
!= EXPR_CONSTANT
)
15649 gfc_error ("end of implied-do loop at %L could not be "
15650 "simplified to a constant value", &start
->where
);
15654 if (!gfc_simplify_expr (step
, 1)
15655 || step
->expr_type
!= EXPR_CONSTANT
)
15657 gfc_error ("step of implied-do loop at %L could not be "
15658 "simplified to a constant value", &start
->where
);
15663 mpz_set (trip
, end
->value
.integer
);
15664 mpz_sub (trip
, trip
, start
->value
.integer
);
15665 mpz_add (trip
, trip
, step
->value
.integer
);
15667 mpz_div (trip
, trip
, step
->value
.integer
);
15669 mpz_set (frame
.value
, start
->value
.integer
);
15671 frame
.prev
= iter_stack
;
15672 frame
.variable
= var
->iter
.var
->symtree
;
15673 iter_stack
= &frame
;
15675 while (mpz_cmp_ui (trip
, 0) > 0)
15677 if (!traverse_data_var (var
->list
, where
))
15683 e
= gfc_copy_expr (var
->expr
);
15684 if (!gfc_simplify_expr (e
, 1))
15691 mpz_add (frame
.value
, frame
.value
, step
->value
.integer
);
15693 mpz_sub_ui (trip
, trip
, 1);
15697 mpz_clear (frame
.value
);
15700 gfc_free_expr (start
);
15701 gfc_free_expr (end
);
15702 gfc_free_expr (step
);
15704 iter_stack
= frame
.prev
;
15709 /* Type resolve variables in the variable list of a DATA statement. */
15712 traverse_data_var (gfc_data_variable
*var
, locus
*where
)
15716 for (; var
; var
= var
->next
)
15718 if (var
->expr
== NULL
)
15719 t
= traverse_data_list (var
, where
);
15721 t
= check_data_variable (var
, where
);
15731 /* Resolve the expressions and iterators associated with a data statement.
15732 This is separate from the assignment checking because data lists should
15733 only be resolved once. */
15736 resolve_data_variables (gfc_data_variable
*d
)
15738 for (; d
; d
= d
->next
)
15740 if (d
->list
== NULL
)
15742 if (!gfc_resolve_expr (d
->expr
))
15747 if (!gfc_resolve_iterator (&d
->iter
, false, true))
15750 if (!resolve_data_variables (d
->list
))
15759 /* Resolve a single DATA statement. We implement this by storing a pointer to
15760 the value list into static variables, and then recursively traversing the
15761 variables list, expanding iterators and such. */
15764 resolve_data (gfc_data
*d
)
15767 if (!resolve_data_variables (d
->var
))
15770 values
.vnode
= d
->value
;
15771 if (d
->value
== NULL
)
15772 mpz_set_ui (values
.left
, 0);
15774 mpz_set (values
.left
, d
->value
->repeat
);
15776 if (!traverse_data_var (d
->var
, &d
->where
))
15779 /* At this point, we better not have any values left. */
15781 if (next_data_value ())
15782 gfc_error ("DATA statement at %L has more values than variables",
15787 /* 12.6 Constraint: In a pure subprogram any variable which is in common or
15788 accessed by host or use association, is a dummy argument to a pure function,
15789 is a dummy argument with INTENT (IN) to a pure subroutine, or an object that
15790 is storage associated with any such variable, shall not be used in the
15791 following contexts: (clients of this function). */
15793 /* Determines if a variable is not 'pure', i.e., not assignable within a pure
15794 procedure. Returns zero if assignment is OK, nonzero if there is a
15797 gfc_impure_variable (gfc_symbol
*sym
)
15802 if (sym
->attr
.use_assoc
|| sym
->attr
.in_common
)
15805 /* Check if the symbol's ns is inside the pure procedure. */
15806 for (ns
= gfc_current_ns
; ns
; ns
= ns
->parent
)
15810 if (ns
->proc_name
->attr
.flavor
== FL_PROCEDURE
&& !sym
->attr
.function
)
15814 proc
= sym
->ns
->proc_name
;
15815 if (sym
->attr
.dummy
15816 && ((proc
->attr
.subroutine
&& sym
->attr
.intent
== INTENT_IN
)
15817 || proc
->attr
.function
))
15820 /* TODO: Sort out what can be storage associated, if anything, and include
15821 it here. In principle equivalences should be scanned but it does not
15822 seem to be possible to storage associate an impure variable this way. */
15827 /* Test whether a symbol is pure or not. For a NULL pointer, checks if the
15828 current namespace is inside a pure procedure. */
15831 gfc_pure (gfc_symbol
*sym
)
15833 symbol_attribute attr
;
15838 /* Check if the current namespace or one of its parents
15839 belongs to a pure procedure. */
15840 for (ns
= gfc_current_ns
; ns
; ns
= ns
->parent
)
15842 sym
= ns
->proc_name
;
15846 if (attr
.flavor
== FL_PROCEDURE
&& attr
.pure
)
15854 return attr
.flavor
== FL_PROCEDURE
&& attr
.pure
;
15858 /* Test whether a symbol is implicitly pure or not. For a NULL pointer,
15859 checks if the current namespace is implicitly pure. Note that this
15860 function returns false for a PURE procedure. */
15863 gfc_implicit_pure (gfc_symbol
*sym
)
15869 /* Check if the current procedure is implicit_pure. Walk up
15870 the procedure list until we find a procedure. */
15871 for (ns
= gfc_current_ns
; ns
; ns
= ns
->parent
)
15873 sym
= ns
->proc_name
;
15877 if (sym
->attr
.flavor
== FL_PROCEDURE
)
15882 return sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.implicit_pure
15883 && !sym
->attr
.pure
;
15888 gfc_unset_implicit_pure (gfc_symbol
*sym
)
15894 /* Check if the current procedure is implicit_pure. Walk up
15895 the procedure list until we find a procedure. */
15896 for (ns
= gfc_current_ns
; ns
; ns
= ns
->parent
)
15898 sym
= ns
->proc_name
;
15902 if (sym
->attr
.flavor
== FL_PROCEDURE
)
15907 if (sym
->attr
.flavor
== FL_PROCEDURE
)
15908 sym
->attr
.implicit_pure
= 0;
15910 sym
->attr
.pure
= 0;
15914 /* Test whether the current procedure is elemental or not. */
15917 gfc_elemental (gfc_symbol
*sym
)
15919 symbol_attribute attr
;
15922 sym
= gfc_current_ns
->proc_name
;
15927 return attr
.flavor
== FL_PROCEDURE
&& attr
.elemental
;
15931 /* Warn about unused labels. */
15934 warn_unused_fortran_label (gfc_st_label
*label
)
15939 warn_unused_fortran_label (label
->left
);
15941 if (label
->defined
== ST_LABEL_UNKNOWN
)
15944 switch (label
->referenced
)
15946 case ST_LABEL_UNKNOWN
:
15947 gfc_warning (OPT_Wunused_label
, "Label %d at %L defined but not used",
15948 label
->value
, &label
->where
);
15951 case ST_LABEL_BAD_TARGET
:
15952 gfc_warning (OPT_Wunused_label
,
15953 "Label %d at %L defined but cannot be used",
15954 label
->value
, &label
->where
);
15961 warn_unused_fortran_label (label
->right
);
15965 /* Returns the sequence type of a symbol or sequence. */
15968 sequence_type (gfc_typespec ts
)
15977 if (ts
.u
.derived
->components
== NULL
)
15978 return SEQ_NONDEFAULT
;
15980 result
= sequence_type (ts
.u
.derived
->components
->ts
);
15981 for (c
= ts
.u
.derived
->components
->next
; c
; c
= c
->next
)
15982 if (sequence_type (c
->ts
) != result
)
15988 if (ts
.kind
!= gfc_default_character_kind
)
15989 return SEQ_NONDEFAULT
;
15991 return SEQ_CHARACTER
;
15994 if (ts
.kind
!= gfc_default_integer_kind
)
15995 return SEQ_NONDEFAULT
;
15997 return SEQ_NUMERIC
;
16000 if (!(ts
.kind
== gfc_default_real_kind
16001 || ts
.kind
== gfc_default_double_kind
))
16002 return SEQ_NONDEFAULT
;
16004 return SEQ_NUMERIC
;
16007 if (ts
.kind
!= gfc_default_complex_kind
)
16008 return SEQ_NONDEFAULT
;
16010 return SEQ_NUMERIC
;
16013 if (ts
.kind
!= gfc_default_logical_kind
)
16014 return SEQ_NONDEFAULT
;
16016 return SEQ_NUMERIC
;
16019 return SEQ_NONDEFAULT
;
16024 /* Resolve derived type EQUIVALENCE object. */
16027 resolve_equivalence_derived (gfc_symbol
*derived
, gfc_symbol
*sym
, gfc_expr
*e
)
16029 gfc_component
*c
= derived
->components
;
16034 /* Shall not be an object of nonsequence derived type. */
16035 if (!derived
->attr
.sequence
)
16037 gfc_error ("Derived type variable %qs at %L must have SEQUENCE "
16038 "attribute to be an EQUIVALENCE object", sym
->name
,
16043 /* Shall not have allocatable components. */
16044 if (derived
->attr
.alloc_comp
)
16046 gfc_error ("Derived type variable %qs at %L cannot have ALLOCATABLE "
16047 "components to be an EQUIVALENCE object",sym
->name
,
16052 if (sym
->attr
.in_common
&& gfc_has_default_initializer (sym
->ts
.u
.derived
))
16054 gfc_error ("Derived type variable %qs at %L with default "
16055 "initialization cannot be in EQUIVALENCE with a variable "
16056 "in COMMON", sym
->name
, &e
->where
);
16060 for (; c
; c
= c
->next
)
16062 if (gfc_bt_struct (c
->ts
.type
)
16063 && (!resolve_equivalence_derived(c
->ts
.u
.derived
, sym
, e
)))
16066 /* Shall not be an object of sequence derived type containing a pointer
16067 in the structure. */
16068 if (c
->attr
.pointer
)
16070 gfc_error ("Derived type variable %qs at %L with pointer "
16071 "component(s) cannot be an EQUIVALENCE object",
16072 sym
->name
, &e
->where
);
16080 /* Resolve equivalence object.
16081 An EQUIVALENCE object shall not be a dummy argument, a pointer, a target,
16082 an allocatable array, an object of nonsequence derived type, an object of
16083 sequence derived type containing a pointer at any level of component
16084 selection, an automatic object, a function name, an entry name, a result
16085 name, a named constant, a structure component, or a subobject of any of
16086 the preceding objects. A substring shall not have length zero. A
16087 derived type shall not have components with default initialization nor
16088 shall two objects of an equivalence group be initialized.
16089 Either all or none of the objects shall have an protected attribute.
16090 The simple constraints are done in symbol.c(check_conflict) and the rest
16091 are implemented here. */
16094 resolve_equivalence (gfc_equiv
*eq
)
16097 gfc_symbol
*first_sym
;
16100 locus
*last_where
= NULL
;
16101 seq_type eq_type
, last_eq_type
;
16102 gfc_typespec
*last_ts
;
16103 int object
, cnt_protected
;
16106 last_ts
= &eq
->expr
->symtree
->n
.sym
->ts
;
16108 first_sym
= eq
->expr
->symtree
->n
.sym
;
16112 for (object
= 1; eq
; eq
= eq
->eq
, object
++)
16116 e
->ts
= e
->symtree
->n
.sym
->ts
;
16117 /* match_varspec might not know yet if it is seeing
16118 array reference or substring reference, as it doesn't
16120 if (e
->ref
&& e
->ref
->type
== REF_ARRAY
)
16122 gfc_ref
*ref
= e
->ref
;
16123 sym
= e
->symtree
->n
.sym
;
16125 if (sym
->attr
.dimension
)
16127 ref
->u
.ar
.as
= sym
->as
;
16131 /* For substrings, convert REF_ARRAY into REF_SUBSTRING. */
16132 if (e
->ts
.type
== BT_CHARACTER
16134 && ref
->type
== REF_ARRAY
16135 && ref
->u
.ar
.dimen
== 1
16136 && ref
->u
.ar
.dimen_type
[0] == DIMEN_RANGE
16137 && ref
->u
.ar
.stride
[0] == NULL
)
16139 gfc_expr
*start
= ref
->u
.ar
.start
[0];
16140 gfc_expr
*end
= ref
->u
.ar
.end
[0];
16143 /* Optimize away the (:) reference. */
16144 if (start
== NULL
&& end
== NULL
)
16147 e
->ref
= ref
->next
;
16149 e
->ref
->next
= ref
->next
;
16154 ref
->type
= REF_SUBSTRING
;
16156 start
= gfc_get_int_expr (gfc_charlen_int_kind
,
16158 ref
->u
.ss
.start
= start
;
16159 if (end
== NULL
&& e
->ts
.u
.cl
)
16160 end
= gfc_copy_expr (e
->ts
.u
.cl
->length
);
16161 ref
->u
.ss
.end
= end
;
16162 ref
->u
.ss
.length
= e
->ts
.u
.cl
;
16169 /* Any further ref is an error. */
16172 gcc_assert (ref
->type
== REF_ARRAY
);
16173 gfc_error ("Syntax error in EQUIVALENCE statement at %L",
16179 if (!gfc_resolve_expr (e
))
16182 sym
= e
->symtree
->n
.sym
;
16184 if (sym
->attr
.is_protected
)
16186 if (cnt_protected
> 0 && cnt_protected
!= object
)
16188 gfc_error ("Either all or none of the objects in the "
16189 "EQUIVALENCE set at %L shall have the "
16190 "PROTECTED attribute",
16195 /* Shall not equivalence common block variables in a PURE procedure. */
16196 if (sym
->ns
->proc_name
16197 && sym
->ns
->proc_name
->attr
.pure
16198 && sym
->attr
.in_common
)
16200 /* Need to check for symbols that may have entered the pure
16201 procedure via a USE statement. */
16202 bool saw_sym
= false;
16203 if (sym
->ns
->use_stmts
)
16206 for (r
= sym
->ns
->use_stmts
->rename
; r
; r
= r
->next
)
16207 if (strcmp(r
->use_name
, sym
->name
) == 0) saw_sym
= true;
16213 gfc_error ("COMMON block member %qs at %L cannot be an "
16214 "EQUIVALENCE object in the pure procedure %qs",
16215 sym
->name
, &e
->where
, sym
->ns
->proc_name
->name
);
16219 /* Shall not be a named constant. */
16220 if (e
->expr_type
== EXPR_CONSTANT
)
16222 gfc_error ("Named constant %qs at %L cannot be an EQUIVALENCE "
16223 "object", sym
->name
, &e
->where
);
16227 if (e
->ts
.type
== BT_DERIVED
16228 && !resolve_equivalence_derived (e
->ts
.u
.derived
, sym
, e
))
16231 /* Check that the types correspond correctly:
16233 A numeric sequence structure may be equivalenced to another sequence
16234 structure, an object of default integer type, default real type, double
16235 precision real type, default logical type such that components of the
16236 structure ultimately only become associated to objects of the same
16237 kind. A character sequence structure may be equivalenced to an object
16238 of default character kind or another character sequence structure.
16239 Other objects may be equivalenced only to objects of the same type and
16240 kind parameters. */
16242 /* Identical types are unconditionally OK. */
16243 if (object
== 1 || gfc_compare_types (last_ts
, &sym
->ts
))
16244 goto identical_types
;
16246 last_eq_type
= sequence_type (*last_ts
);
16247 eq_type
= sequence_type (sym
->ts
);
16249 /* Since the pair of objects is not of the same type, mixed or
16250 non-default sequences can be rejected. */
16252 msg
= "Sequence %s with mixed components in EQUIVALENCE "
16253 "statement at %L with different type objects";
16255 && last_eq_type
== SEQ_MIXED
16256 && !gfc_notify_std (GFC_STD_GNU
, msg
, first_sym
->name
, last_where
))
16257 || (eq_type
== SEQ_MIXED
16258 && !gfc_notify_std (GFC_STD_GNU
, msg
, sym
->name
, &e
->where
)))
16261 msg
= "Non-default type object or sequence %s in EQUIVALENCE "
16262 "statement at %L with objects of different type";
16264 && last_eq_type
== SEQ_NONDEFAULT
16265 && !gfc_notify_std (GFC_STD_GNU
, msg
, first_sym
->name
, last_where
))
16266 || (eq_type
== SEQ_NONDEFAULT
16267 && !gfc_notify_std (GFC_STD_GNU
, msg
, sym
->name
, &e
->where
)))
16270 msg
="Non-CHARACTER object %qs in default CHARACTER "
16271 "EQUIVALENCE statement at %L";
16272 if (last_eq_type
== SEQ_CHARACTER
16273 && eq_type
!= SEQ_CHARACTER
16274 && !gfc_notify_std (GFC_STD_GNU
, msg
, sym
->name
, &e
->where
))
16277 msg
="Non-NUMERIC object %qs in default NUMERIC "
16278 "EQUIVALENCE statement at %L";
16279 if (last_eq_type
== SEQ_NUMERIC
16280 && eq_type
!= SEQ_NUMERIC
16281 && !gfc_notify_std (GFC_STD_GNU
, msg
, sym
->name
, &e
->where
))
16286 last_where
= &e
->where
;
16291 /* Shall not be an automatic array. */
16292 if (e
->ref
->type
== REF_ARRAY
16293 && !gfc_resolve_array_spec (e
->ref
->u
.ar
.as
, 1))
16295 gfc_error ("Array %qs at %L with non-constant bounds cannot be "
16296 "an EQUIVALENCE object", sym
->name
, &e
->where
);
16303 /* Shall not be a structure component. */
16304 if (r
->type
== REF_COMPONENT
)
16306 gfc_error ("Structure component %qs at %L cannot be an "
16307 "EQUIVALENCE object",
16308 r
->u
.c
.component
->name
, &e
->where
);
16312 /* A substring shall not have length zero. */
16313 if (r
->type
== REF_SUBSTRING
)
16315 if (compare_bound (r
->u
.ss
.start
, r
->u
.ss
.end
) == CMP_GT
)
16317 gfc_error ("Substring at %L has length zero",
16318 &r
->u
.ss
.start
->where
);
16328 /* Function called by resolve_fntype to flag other symbol used in the
16329 length type parameter specification of function resuls. */
16332 flag_fn_result_spec (gfc_expr
*expr
,
16334 int *f ATTRIBUTE_UNUSED
)
16339 if (expr
->expr_type
== EXPR_VARIABLE
)
16341 s
= expr
->symtree
->n
.sym
;
16342 for (ns
= s
->ns
; ns
; ns
= ns
->parent
)
16348 gfc_error ("Self reference in character length expression "
16349 "for %qs at %L", sym
->name
, &expr
->where
);
16353 if (!s
->fn_result_spec
16354 && s
->attr
.flavor
== FL_PARAMETER
)
16356 /* Function contained in a module.... */
16357 if (ns
->proc_name
&& ns
->proc_name
->attr
.flavor
== FL_MODULE
)
16360 s
->fn_result_spec
= 1;
16361 /* Make sure that this symbol is translated as a module
16363 st
= gfc_get_unique_symtree (ns
);
16367 /* ... which is use associated and called. */
16368 else if (s
->attr
.use_assoc
|| s
->attr
.used_in_submodule
16370 /* External function matched with an interface. */
16373 && s
->ns
->proc_name
->attr
.if_source
== IFSRC_DECL
)
16374 || s
->ns
->proc_name
->attr
.if_source
== IFSRC_IFBODY
)
16375 && s
->ns
->proc_name
->attr
.function
))
16376 s
->fn_result_spec
= 1;
16383 /* Resolve function and ENTRY types, issue diagnostics if needed. */
16386 resolve_fntype (gfc_namespace
*ns
)
16388 gfc_entry_list
*el
;
16391 if (ns
->proc_name
== NULL
|| !ns
->proc_name
->attr
.function
)
16394 /* If there are any entries, ns->proc_name is the entry master
16395 synthetic symbol and ns->entries->sym actual FUNCTION symbol. */
16397 sym
= ns
->entries
->sym
;
16399 sym
= ns
->proc_name
;
16400 if (sym
->result
== sym
16401 && sym
->ts
.type
== BT_UNKNOWN
16402 && !gfc_set_default_type (sym
, 0, NULL
)
16403 && !sym
->attr
.untyped
)
16405 gfc_error ("Function %qs at %L has no IMPLICIT type",
16406 sym
->name
, &sym
->declared_at
);
16407 sym
->attr
.untyped
= 1;
16410 if (sym
->ts
.type
== BT_DERIVED
&& !sym
->ts
.u
.derived
->attr
.use_assoc
16411 && !sym
->attr
.contained
16412 && !gfc_check_symbol_access (sym
->ts
.u
.derived
)
16413 && gfc_check_symbol_access (sym
))
16415 gfc_notify_std (GFC_STD_F2003
, "PUBLIC function %qs at "
16416 "%L of PRIVATE type %qs", sym
->name
,
16417 &sym
->declared_at
, sym
->ts
.u
.derived
->name
);
16421 for (el
= ns
->entries
->next
; el
; el
= el
->next
)
16423 if (el
->sym
->result
== el
->sym
16424 && el
->sym
->ts
.type
== BT_UNKNOWN
16425 && !gfc_set_default_type (el
->sym
, 0, NULL
)
16426 && !el
->sym
->attr
.untyped
)
16428 gfc_error ("ENTRY %qs at %L has no IMPLICIT type",
16429 el
->sym
->name
, &el
->sym
->declared_at
);
16430 el
->sym
->attr
.untyped
= 1;
16434 if (sym
->ts
.type
== BT_CHARACTER
)
16435 gfc_traverse_expr (sym
->ts
.u
.cl
->length
, sym
, flag_fn_result_spec
, 0);
16439 /* 12.3.2.1.1 Defined operators. */
16442 check_uop_procedure (gfc_symbol
*sym
, locus where
)
16444 gfc_formal_arglist
*formal
;
16446 if (!sym
->attr
.function
)
16448 gfc_error ("User operator procedure %qs at %L must be a FUNCTION",
16449 sym
->name
, &where
);
16453 if (sym
->ts
.type
== BT_CHARACTER
16454 && !((sym
->ts
.u
.cl
&& sym
->ts
.u
.cl
->length
) || sym
->ts
.deferred
)
16455 && !(sym
->result
&& ((sym
->result
->ts
.u
.cl
16456 && sym
->result
->ts
.u
.cl
->length
) || sym
->result
->ts
.deferred
)))
16458 gfc_error ("User operator procedure %qs at %L cannot be assumed "
16459 "character length", sym
->name
, &where
);
16463 formal
= gfc_sym_get_dummy_args (sym
);
16464 if (!formal
|| !formal
->sym
)
16466 gfc_error ("User operator procedure %qs at %L must have at least "
16467 "one argument", sym
->name
, &where
);
16471 if (formal
->sym
->attr
.intent
!= INTENT_IN
)
16473 gfc_error ("First argument of operator interface at %L must be "
16474 "INTENT(IN)", &where
);
16478 if (formal
->sym
->attr
.optional
)
16480 gfc_error ("First argument of operator interface at %L cannot be "
16481 "optional", &where
);
16485 formal
= formal
->next
;
16486 if (!formal
|| !formal
->sym
)
16489 if (formal
->sym
->attr
.intent
!= INTENT_IN
)
16491 gfc_error ("Second argument of operator interface at %L must be "
16492 "INTENT(IN)", &where
);
16496 if (formal
->sym
->attr
.optional
)
16498 gfc_error ("Second argument of operator interface at %L cannot be "
16499 "optional", &where
);
16505 gfc_error ("Operator interface at %L must have, at most, two "
16506 "arguments", &where
);
16514 gfc_resolve_uops (gfc_symtree
*symtree
)
16516 gfc_interface
*itr
;
16518 if (symtree
== NULL
)
16521 gfc_resolve_uops (symtree
->left
);
16522 gfc_resolve_uops (symtree
->right
);
16524 for (itr
= symtree
->n
.uop
->op
; itr
; itr
= itr
->next
)
16525 check_uop_procedure (itr
->sym
, itr
->sym
->declared_at
);
16529 /* Examine all of the expressions associated with a program unit,
16530 assign types to all intermediate expressions, make sure that all
16531 assignments are to compatible types and figure out which names
16532 refer to which functions or subroutines. It doesn't check code
16533 block, which is handled by gfc_resolve_code. */
16536 resolve_types (gfc_namespace
*ns
)
16542 gfc_namespace
* old_ns
= gfc_current_ns
;
16544 if (ns
->types_resolved
)
16547 /* Check that all IMPLICIT types are ok. */
16548 if (!ns
->seen_implicit_none
)
16551 for (letter
= 0; letter
!= GFC_LETTERS
; ++letter
)
16552 if (ns
->set_flag
[letter
]
16553 && !resolve_typespec_used (&ns
->default_type
[letter
],
16554 &ns
->implicit_loc
[letter
], NULL
))
16558 gfc_current_ns
= ns
;
16560 resolve_entries (ns
);
16562 resolve_common_vars (&ns
->blank_common
, false);
16563 resolve_common_blocks (ns
->common_root
);
16565 resolve_contained_functions (ns
);
16567 if (ns
->proc_name
&& ns
->proc_name
->attr
.flavor
== FL_PROCEDURE
16568 && ns
->proc_name
->attr
.if_source
== IFSRC_IFBODY
)
16569 resolve_formal_arglist (ns
->proc_name
);
16571 gfc_traverse_ns (ns
, resolve_bind_c_derived_types
);
16573 for (cl
= ns
->cl_list
; cl
; cl
= cl
->next
)
16574 resolve_charlen (cl
);
16576 gfc_traverse_ns (ns
, resolve_symbol
);
16578 resolve_fntype (ns
);
16580 for (n
= ns
->contained
; n
; n
= n
->sibling
)
16582 if (gfc_pure (ns
->proc_name
) && !gfc_pure (n
->proc_name
))
16583 gfc_error ("Contained procedure %qs at %L of a PURE procedure must "
16584 "also be PURE", n
->proc_name
->name
,
16585 &n
->proc_name
->declared_at
);
16591 gfc_do_concurrent_flag
= 0;
16592 gfc_check_interfaces (ns
);
16594 gfc_traverse_ns (ns
, resolve_values
);
16600 for (d
= ns
->data
; d
; d
= d
->next
)
16604 gfc_traverse_ns (ns
, gfc_formalize_init_value
);
16606 gfc_traverse_ns (ns
, gfc_verify_binding_labels
);
16608 for (eq
= ns
->equiv
; eq
; eq
= eq
->next
)
16609 resolve_equivalence (eq
);
16611 /* Warn about unused labels. */
16612 if (warn_unused_label
)
16613 warn_unused_fortran_label (ns
->st_labels
);
16615 gfc_resolve_uops (ns
->uop_root
);
16617 gfc_traverse_ns (ns
, gfc_verify_DTIO_procedures
);
16619 gfc_resolve_omp_declare_simd (ns
);
16621 gfc_resolve_omp_udrs (ns
->omp_udr_root
);
16623 ns
->types_resolved
= 1;
16625 gfc_current_ns
= old_ns
;
16629 /* Call gfc_resolve_code recursively. */
16632 resolve_codes (gfc_namespace
*ns
)
16635 bitmap_obstack old_obstack
;
16637 if (ns
->resolved
== 1)
16640 for (n
= ns
->contained
; n
; n
= n
->sibling
)
16643 gfc_current_ns
= ns
;
16645 /* Don't clear 'cs_base' if this is the namespace of a BLOCK construct. */
16646 if (!(ns
->proc_name
&& ns
->proc_name
->attr
.flavor
== FL_LABEL
))
16649 /* Set to an out of range value. */
16650 current_entry_id
= -1;
16652 old_obstack
= labels_obstack
;
16653 bitmap_obstack_initialize (&labels_obstack
);
16655 gfc_resolve_oacc_declare (ns
);
16656 gfc_resolve_omp_local_vars (ns
);
16657 gfc_resolve_code (ns
->code
, ns
);
16659 bitmap_obstack_release (&labels_obstack
);
16660 labels_obstack
= old_obstack
;
16664 /* This function is called after a complete program unit has been compiled.
16665 Its purpose is to examine all of the expressions associated with a program
16666 unit, assign types to all intermediate expressions, make sure that all
16667 assignments are to compatible types and figure out which names refer to
16668 which functions or subroutines. */
16671 gfc_resolve (gfc_namespace
*ns
)
16673 gfc_namespace
*old_ns
;
16674 code_stack
*old_cs_base
;
16675 struct gfc_omp_saved_state old_omp_state
;
16681 old_ns
= gfc_current_ns
;
16682 old_cs_base
= cs_base
;
16684 /* As gfc_resolve can be called during resolution of an OpenMP construct
16685 body, we should clear any state associated to it, so that say NS's
16686 DO loops are not interpreted as OpenMP loops. */
16687 if (!ns
->construct_entities
)
16688 gfc_omp_save_and_clear_state (&old_omp_state
);
16690 resolve_types (ns
);
16691 component_assignment_level
= 0;
16692 resolve_codes (ns
);
16694 gfc_current_ns
= old_ns
;
16695 cs_base
= old_cs_base
;
16698 gfc_run_passes (ns
);
16700 if (!ns
->construct_entities
)
16701 gfc_omp_restore_state (&old_omp_state
);