1 /* Backend function setup
2 Copyright (C) 2002, 2003, 2004, 2005, 2006 Free Software Foundation,
4 Contributed by Paul Brook
6 This file is part of GCC.
8 GCC is free software; you can redistribute it and/or modify it under
9 the terms of the GNU General Public License as published by the Free
10 Software Foundation; either version 2, or (at your option) any later
13 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
14 WARRANTY; without even the implied warranty of MERCHANTABILITY or
15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
18 You should have received a copy of the GNU General Public License
19 along with GCC; see the file COPYING. If not, write to the Free
20 Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
23 /* trans-decl.c -- Handling of backend function and variable decls, etc */
27 #include "coretypes.h"
29 #include "tree-dump.h"
30 #include "tree-gimple.h"
41 #include "trans-types.h"
42 #include "trans-array.h"
43 #include "trans-const.h"
44 /* Only for gfc_trans_code. Shouldn't need to include this. */
45 #include "trans-stmt.h"
47 #define MAX_LABEL_VALUE 99999
50 /* Holds the result of the function if no result variable specified. */
52 static GTY(()) tree current_fake_result_decl;
53 static GTY(()) tree parent_fake_result_decl;
55 static GTY(()) tree current_function_return_label;
58 /* Holds the variable DECLs for the current function. */
60 static GTY(()) tree saved_function_decls;
61 static GTY(()) tree saved_parent_function_decls;
64 /* The namespace of the module we're currently generating. Only used while
65 outputting decls for module variables. Do not rely on this being set. */
67 static gfc_namespace *module_namespace;
70 /* List of static constructor functions. */
72 tree gfc_static_ctors;
75 /* Function declarations for builtin library functions. */
77 tree gfor_fndecl_internal_malloc;
78 tree gfor_fndecl_internal_malloc64;
79 tree gfor_fndecl_internal_realloc;
80 tree gfor_fndecl_internal_realloc64;
81 tree gfor_fndecl_internal_free;
82 tree gfor_fndecl_allocate;
83 tree gfor_fndecl_allocate64;
84 tree gfor_fndecl_allocate_array;
85 tree gfor_fndecl_allocate64_array;
86 tree gfor_fndecl_deallocate;
87 tree gfor_fndecl_pause_numeric;
88 tree gfor_fndecl_pause_string;
89 tree gfor_fndecl_stop_numeric;
90 tree gfor_fndecl_stop_string;
91 tree gfor_fndecl_select_string;
92 tree gfor_fndecl_runtime_error;
93 tree gfor_fndecl_set_fpe;
94 tree gfor_fndecl_set_std;
95 tree gfor_fndecl_set_convert;
96 tree gfor_fndecl_set_record_marker;
97 tree gfor_fndecl_ctime;
98 tree gfor_fndecl_fdate;
99 tree gfor_fndecl_ttynam;
100 tree gfor_fndecl_in_pack;
101 tree gfor_fndecl_in_unpack;
102 tree gfor_fndecl_associated;
105 /* Math functions. Many other math functions are handled in
106 trans-intrinsic.c. */
108 gfc_powdecl_list gfor_fndecl_math_powi[4][3];
109 tree gfor_fndecl_math_cpowf;
110 tree gfor_fndecl_math_cpow;
111 tree gfor_fndecl_math_cpowl10;
112 tree gfor_fndecl_math_cpowl16;
113 tree gfor_fndecl_math_ishftc4;
114 tree gfor_fndecl_math_ishftc8;
115 tree gfor_fndecl_math_ishftc16;
116 tree gfor_fndecl_math_exponent4;
117 tree gfor_fndecl_math_exponent8;
118 tree gfor_fndecl_math_exponent10;
119 tree gfor_fndecl_math_exponent16;
122 /* String functions. */
124 tree gfor_fndecl_compare_string;
125 tree gfor_fndecl_concat_string;
126 tree gfor_fndecl_string_len_trim;
127 tree gfor_fndecl_string_index;
128 tree gfor_fndecl_string_scan;
129 tree gfor_fndecl_string_verify;
130 tree gfor_fndecl_string_trim;
131 tree gfor_fndecl_string_repeat;
132 tree gfor_fndecl_adjustl;
133 tree gfor_fndecl_adjustr;
136 /* Other misc. runtime library functions. */
138 tree gfor_fndecl_size0;
139 tree gfor_fndecl_size1;
140 tree gfor_fndecl_iargc;
142 /* Intrinsic functions implemented in FORTRAN. */
143 tree gfor_fndecl_si_kind;
144 tree gfor_fndecl_sr_kind;
146 /* BLAS gemm functions. */
147 tree gfor_fndecl_sgemm;
148 tree gfor_fndecl_dgemm;
149 tree gfor_fndecl_cgemm;
150 tree gfor_fndecl_zgemm;
154 gfc_add_decl_to_parent_function (tree decl)
157 DECL_CONTEXT (decl) = DECL_CONTEXT (current_function_decl);
158 DECL_NONLOCAL (decl) = 1;
159 TREE_CHAIN (decl) = saved_parent_function_decls;
160 saved_parent_function_decls = decl;
164 gfc_add_decl_to_function (tree decl)
167 TREE_USED (decl) = 1;
168 DECL_CONTEXT (decl) = current_function_decl;
169 TREE_CHAIN (decl) = saved_function_decls;
170 saved_function_decls = decl;
174 /* Build a backend label declaration. Set TREE_USED for named labels.
175 The context of the label is always the current_function_decl. All
176 labels are marked artificial. */
179 gfc_build_label_decl (tree label_id)
181 /* 2^32 temporaries should be enough. */
182 static unsigned int tmp_num = 1;
186 if (label_id == NULL_TREE)
188 /* Build an internal label name. */
189 ASM_FORMAT_PRIVATE_NAME (label_name, "L", tmp_num++);
190 label_id = get_identifier (label_name);
195 /* Build the LABEL_DECL node. Labels have no type. */
196 label_decl = build_decl (LABEL_DECL, label_id, void_type_node);
197 DECL_CONTEXT (label_decl) = current_function_decl;
198 DECL_MODE (label_decl) = VOIDmode;
200 /* We always define the label as used, even if the original source
201 file never references the label. We don't want all kinds of
202 spurious warnings for old-style Fortran code with too many
204 TREE_USED (label_decl) = 1;
206 DECL_ARTIFICIAL (label_decl) = 1;
211 /* Returns the return label for the current function. */
214 gfc_get_return_label (void)
216 char name[GFC_MAX_SYMBOL_LEN + 10];
218 if (current_function_return_label)
219 return current_function_return_label;
221 sprintf (name, "__return_%s",
222 IDENTIFIER_POINTER (DECL_NAME (current_function_decl)));
224 current_function_return_label =
225 gfc_build_label_decl (get_identifier (name));
227 DECL_ARTIFICIAL (current_function_return_label) = 1;
229 return current_function_return_label;
233 /* Set the backend source location of a decl. */
236 gfc_set_decl_location (tree decl, locus * loc)
238 #ifdef USE_MAPPED_LOCATION
239 DECL_SOURCE_LOCATION (decl) = loc->lb->location;
241 DECL_SOURCE_LINE (decl) = loc->lb->linenum;
242 DECL_SOURCE_FILE (decl) = loc->lb->file->filename;
247 /* Return the backend label declaration for a given label structure,
248 or create it if it doesn't exist yet. */
251 gfc_get_label_decl (gfc_st_label * lp)
253 if (lp->backend_decl)
254 return lp->backend_decl;
257 char label_name[GFC_MAX_SYMBOL_LEN + 1];
260 /* Validate the label declaration from the front end. */
261 gcc_assert (lp != NULL && lp->value <= MAX_LABEL_VALUE);
263 /* Build a mangled name for the label. */
264 sprintf (label_name, "__label_%.6d", lp->value);
266 /* Build the LABEL_DECL node. */
267 label_decl = gfc_build_label_decl (get_identifier (label_name));
269 /* Tell the debugger where the label came from. */
270 if (lp->value <= MAX_LABEL_VALUE) /* An internal label. */
271 gfc_set_decl_location (label_decl, &lp->where);
273 DECL_ARTIFICIAL (label_decl) = 1;
275 /* Store the label in the label list and return the LABEL_DECL. */
276 lp->backend_decl = label_decl;
282 /* Convert a gfc_symbol to an identifier of the same name. */
285 gfc_sym_identifier (gfc_symbol * sym)
287 return (get_identifier (sym->name));
291 /* Construct mangled name from symbol name. */
294 gfc_sym_mangled_identifier (gfc_symbol * sym)
296 char name[GFC_MAX_MANGLED_SYMBOL_LEN + 1];
298 if (sym->module == NULL)
299 return gfc_sym_identifier (sym);
302 snprintf (name, sizeof name, "__%s__%s", sym->module, sym->name);
303 return get_identifier (name);
308 /* Construct mangled function name from symbol name. */
311 gfc_sym_mangled_function_id (gfc_symbol * sym)
314 char name[GFC_MAX_MANGLED_SYMBOL_LEN + 1];
316 if (sym->module == NULL || sym->attr.proc == PROC_EXTERNAL
317 || (sym->module != NULL && sym->attr.if_source == IFSRC_IFBODY))
319 if (strcmp (sym->name, "MAIN__") == 0
320 || sym->attr.proc == PROC_INTRINSIC)
321 return get_identifier (sym->name);
323 if (gfc_option.flag_underscoring)
325 has_underscore = strchr (sym->name, '_') != 0;
326 if (gfc_option.flag_second_underscore && has_underscore)
327 snprintf (name, sizeof name, "%s__", sym->name);
329 snprintf (name, sizeof name, "%s_", sym->name);
330 return get_identifier (name);
333 return get_identifier (sym->name);
337 snprintf (name, sizeof name, "__%s__%s", sym->module, sym->name);
338 return get_identifier (name);
343 /* Returns true if a variable of specified size should go on the stack. */
346 gfc_can_put_var_on_stack (tree size)
348 unsigned HOST_WIDE_INT low;
350 if (!INTEGER_CST_P (size))
353 if (gfc_option.flag_max_stack_var_size < 0)
356 if (TREE_INT_CST_HIGH (size) != 0)
359 low = TREE_INT_CST_LOW (size);
360 if (low > (unsigned HOST_WIDE_INT) gfc_option.flag_max_stack_var_size)
363 /* TODO: Set a per-function stack size limit. */
369 /* gfc_finish_cray_pointee sets DECL_VALUE_EXPR for a Cray pointee to
370 an expression involving its corresponding pointer. There are
371 2 cases; one for variable size arrays, and one for everything else,
372 because variable-sized arrays require one fewer level of
376 gfc_finish_cray_pointee (tree decl, gfc_symbol *sym)
378 tree ptr_decl = gfc_get_symbol_decl (sym->cp_pointer);
381 /* Parameters need to be dereferenced. */
382 if (sym->cp_pointer->attr.dummy)
383 ptr_decl = build_fold_indirect_ref (ptr_decl);
385 /* Check to see if we're dealing with a variable-sized array. */
386 if (sym->attr.dimension
387 && TREE_CODE (TREE_TYPE (decl)) == POINTER_TYPE)
389 /* These decls will be dereferenced later, so we don't dereference
391 value = convert (TREE_TYPE (decl), ptr_decl);
395 ptr_decl = convert (build_pointer_type (TREE_TYPE (decl)),
397 value = build_fold_indirect_ref (ptr_decl);
400 SET_DECL_VALUE_EXPR (decl, value);
401 DECL_HAS_VALUE_EXPR_P (decl) = 1;
402 GFC_DECL_CRAY_POINTEE (decl) = 1;
403 /* This is a fake variable just for debugging purposes. */
404 TREE_ASM_WRITTEN (decl) = 1;
408 /* Finish processing of a declaration and install its initial value. */
411 gfc_finish_decl (tree decl, tree init)
413 if (TREE_CODE (decl) == PARM_DECL)
414 gcc_assert (init == NULL_TREE);
415 /* Remember that PARM_DECL doesn't have a DECL_INITIAL field per se
416 -- it overlaps DECL_ARG_TYPE. */
417 else if (init == NULL_TREE)
418 gcc_assert (DECL_INITIAL (decl) == NULL_TREE);
420 gcc_assert (DECL_INITIAL (decl) == error_mark_node);
422 if (init != NULL_TREE)
424 if (TREE_CODE (decl) != TYPE_DECL)
425 DECL_INITIAL (decl) = init;
428 /* typedef foo = bar; store the type of bar as the type of foo. */
429 TREE_TYPE (decl) = TREE_TYPE (init);
430 DECL_INITIAL (decl) = init = 0;
434 if (TREE_CODE (decl) == VAR_DECL)
436 if (DECL_SIZE (decl) == NULL_TREE
437 && TYPE_SIZE (TREE_TYPE (decl)) != NULL_TREE)
438 layout_decl (decl, 0);
440 /* A static variable with an incomplete type is an error if it is
441 initialized. Also if it is not file scope. Otherwise, let it
442 through, but if it is not `extern' then it may cause an error
444 /* An automatic variable with an incomplete type is an error. */
445 if (DECL_SIZE (decl) == NULL_TREE
446 && (TREE_STATIC (decl) ? (DECL_INITIAL (decl) != 0
447 || DECL_CONTEXT (decl) != 0)
448 : !DECL_EXTERNAL (decl)))
450 gfc_fatal_error ("storage size not known");
453 if ((DECL_EXTERNAL (decl) || TREE_STATIC (decl))
454 && (DECL_SIZE (decl) != 0)
455 && (TREE_CODE (DECL_SIZE (decl)) != INTEGER_CST))
457 gfc_fatal_error ("storage size not constant");
464 /* Apply symbol attributes to a variable, and add it to the function scope. */
467 gfc_finish_var_decl (tree decl, gfc_symbol * sym)
469 /* TREE_ADDRESSABLE means the address of this variable is actually needed.
470 This is the equivalent of the TARGET variables.
471 We also need to set this if the variable is passed by reference in a
474 /* Set DECL_VALUE_EXPR for Cray Pointees. */
475 if (sym->attr.cray_pointee)
476 gfc_finish_cray_pointee (decl, sym);
478 if (sym->attr.target)
479 TREE_ADDRESSABLE (decl) = 1;
480 /* If it wasn't used we wouldn't be getting it. */
481 TREE_USED (decl) = 1;
483 /* Chain this decl to the pending declarations. Don't do pushdecl()
484 because this would add them to the current scope rather than the
486 if (current_function_decl != NULL_TREE)
488 if (sym->ns->proc_name->backend_decl == current_function_decl
489 || sym->result == sym)
490 gfc_add_decl_to_function (decl);
492 gfc_add_decl_to_parent_function (decl);
495 if (sym->attr.cray_pointee)
498 /* If a variable is USE associated, it's always external. */
499 if (sym->attr.use_assoc)
501 DECL_EXTERNAL (decl) = 1;
502 TREE_PUBLIC (decl) = 1;
504 else if (sym->module && !sym->attr.result && !sym->attr.dummy)
506 /* TODO: Don't set sym->module for result or dummy variables. */
507 gcc_assert (current_function_decl == NULL_TREE || sym->result == sym);
508 /* This is the declaration of a module variable. */
509 TREE_PUBLIC (decl) = 1;
510 TREE_STATIC (decl) = 1;
513 if ((sym->attr.save || sym->attr.data || sym->value)
514 && !sym->attr.use_assoc)
515 TREE_STATIC (decl) = 1;
517 if (sym->attr.volatile_)
520 TREE_THIS_VOLATILE (decl) = 1;
521 new = build_qualified_type (TREE_TYPE (decl), TYPE_QUAL_VOLATILE);
522 TREE_TYPE (decl) = new;
525 /* Keep variables larger than max-stack-var-size off stack. */
526 if (!sym->ns->proc_name->attr.recursive
527 && INTEGER_CST_P (DECL_SIZE_UNIT (decl))
528 && !gfc_can_put_var_on_stack (DECL_SIZE_UNIT (decl))
529 /* Put variable length auto array pointers always into stack. */
530 && (TREE_CODE (TREE_TYPE (decl)) != POINTER_TYPE
531 || sym->attr.dimension == 0
532 || sym->as->type != AS_EXPLICIT
534 || sym->attr.allocatable)
535 && !DECL_ARTIFICIAL (decl))
536 TREE_STATIC (decl) = 1;
538 /* Handle threadprivate variables. */
539 if (sym->attr.threadprivate && targetm.have_tls
540 && (TREE_STATIC (decl) || DECL_EXTERNAL (decl)))
541 DECL_TLS_MODEL (decl) = decl_default_tls_model (decl);
545 /* Allocate the lang-specific part of a decl. */
548 gfc_allocate_lang_decl (tree decl)
550 DECL_LANG_SPECIFIC (decl) = (struct lang_decl *)
551 ggc_alloc_cleared (sizeof (struct lang_decl));
554 /* Remember a symbol to generate initialization/cleanup code at function
558 gfc_defer_symbol_init (gfc_symbol * sym)
564 /* Don't add a symbol twice. */
568 last = head = sym->ns->proc_name;
571 /* Make sure that setup code for dummy variables which are used in the
572 setup of other variables is generated first. */
575 /* Find the first dummy arg seen after us, or the first non-dummy arg.
576 This is a circular list, so don't go past the head. */
578 && (!p->attr.dummy || p->dummy_order > sym->dummy_order))
584 /* Insert in between last and p. */
590 /* Create an array index type variable with function scope. */
593 create_index_var (const char * pfx, int nest)
597 decl = gfc_create_var_np (gfc_array_index_type, pfx);
599 gfc_add_decl_to_parent_function (decl);
601 gfc_add_decl_to_function (decl);
606 /* Create variables to hold all the non-constant bits of info for a
607 descriptorless array. Remember these in the lang-specific part of the
611 gfc_build_qualified_array (tree decl, gfc_symbol * sym)
617 type = TREE_TYPE (decl);
619 /* We just use the descriptor, if there is one. */
620 if (GFC_DESCRIPTOR_TYPE_P (type))
623 gcc_assert (GFC_ARRAY_TYPE_P (type));
624 nest = (sym->ns->proc_name->backend_decl != current_function_decl)
625 && !sym->attr.contained;
627 for (dim = 0; dim < GFC_TYPE_ARRAY_RANK (type); dim++)
629 if (GFC_TYPE_ARRAY_LBOUND (type, dim) == NULL_TREE)
630 GFC_TYPE_ARRAY_LBOUND (type, dim) = create_index_var ("lbound", nest);
631 /* Don't try to use the unknown bound for assumed shape arrays. */
632 if (GFC_TYPE_ARRAY_UBOUND (type, dim) == NULL_TREE
633 && (sym->as->type != AS_ASSUMED_SIZE
634 || dim < GFC_TYPE_ARRAY_RANK (type) - 1))
635 GFC_TYPE_ARRAY_UBOUND (type, dim) = create_index_var ("ubound", nest);
637 if (GFC_TYPE_ARRAY_STRIDE (type, dim) == NULL_TREE)
638 GFC_TYPE_ARRAY_STRIDE (type, dim) = create_index_var ("stride", nest);
640 if (GFC_TYPE_ARRAY_OFFSET (type) == NULL_TREE)
642 GFC_TYPE_ARRAY_OFFSET (type) = gfc_create_var_np (gfc_array_index_type,
645 gfc_add_decl_to_parent_function (GFC_TYPE_ARRAY_OFFSET (type));
647 gfc_add_decl_to_function (GFC_TYPE_ARRAY_OFFSET (type));
650 if (GFC_TYPE_ARRAY_SIZE (type) == NULL_TREE
651 && sym->as->type != AS_ASSUMED_SIZE)
652 GFC_TYPE_ARRAY_SIZE (type) = create_index_var ("size", nest);
654 if (POINTER_TYPE_P (type))
656 gcc_assert (GFC_ARRAY_TYPE_P (TREE_TYPE (type)));
657 gcc_assert (TYPE_LANG_SPECIFIC (type)
658 == TYPE_LANG_SPECIFIC (TREE_TYPE (type)));
659 type = TREE_TYPE (type);
662 if (! COMPLETE_TYPE_P (type) && GFC_TYPE_ARRAY_SIZE (type))
666 size = build2 (MINUS_EXPR, gfc_array_index_type,
667 GFC_TYPE_ARRAY_SIZE (type), gfc_index_one_node);
668 range = build_range_type (gfc_array_index_type, gfc_index_zero_node,
670 TYPE_DOMAIN (type) = range;
676 /* For some dummy arguments we don't use the actual argument directly.
677 Instead we create a local decl and use that. This allows us to perform
678 initialization, and construct full type information. */
681 gfc_build_dummy_array_decl (gfc_symbol * sym, tree dummy)
691 if (sym->attr.pointer || sym->attr.allocatable)
694 /* Add to list of variables if not a fake result variable. */
695 if (sym->attr.result || sym->attr.dummy)
696 gfc_defer_symbol_init (sym);
698 type = TREE_TYPE (dummy);
699 gcc_assert (TREE_CODE (dummy) == PARM_DECL
700 && POINTER_TYPE_P (type));
702 /* Do we know the element size? */
703 known_size = sym->ts.type != BT_CHARACTER
704 || INTEGER_CST_P (sym->ts.cl->backend_decl);
706 if (known_size && !GFC_DESCRIPTOR_TYPE_P (TREE_TYPE (type)))
708 /* For descriptorless arrays with known element size the actual
709 argument is sufficient. */
710 gcc_assert (GFC_ARRAY_TYPE_P (type));
711 gfc_build_qualified_array (dummy, sym);
715 type = TREE_TYPE (type);
716 if (GFC_DESCRIPTOR_TYPE_P (type))
718 /* Create a descriptorless array pointer. */
721 if (!gfc_option.flag_repack_arrays)
723 if (as->type == AS_ASSUMED_SIZE)
728 if (as->type == AS_EXPLICIT)
731 for (n = 0; n < as->rank; n++)
735 && as->upper[n]->expr_type == EXPR_CONSTANT
736 && as->lower[n]->expr_type == EXPR_CONSTANT))
744 type = gfc_typenode_for_spec (&sym->ts);
745 type = gfc_get_nodesc_array_type (type, sym->as, packed);
749 /* We now have an expression for the element size, so create a fully
750 qualified type. Reset sym->backend decl or this will just return the
752 DECL_ARTIFICIAL (sym->backend_decl) = 1;
753 sym->backend_decl = NULL_TREE;
754 type = gfc_sym_type (sym);
758 ASM_FORMAT_PRIVATE_NAME (name, IDENTIFIER_POINTER (DECL_NAME (dummy)), 0);
759 decl = build_decl (VAR_DECL, get_identifier (name), type);
761 DECL_ARTIFICIAL (decl) = 1;
762 TREE_PUBLIC (decl) = 0;
763 TREE_STATIC (decl) = 0;
764 DECL_EXTERNAL (decl) = 0;
766 /* We should never get deferred shape arrays here. We used to because of
768 gcc_assert (sym->as->type != AS_DEFERRED);
773 GFC_DECL_PARTIAL_PACKED_ARRAY (decl) = 1;
777 GFC_DECL_PACKED_ARRAY (decl) = 1;
781 gfc_build_qualified_array (decl, sym);
783 if (DECL_LANG_SPECIFIC (dummy))
784 DECL_LANG_SPECIFIC (decl) = DECL_LANG_SPECIFIC (dummy);
786 gfc_allocate_lang_decl (decl);
788 GFC_DECL_SAVED_DESCRIPTOR (decl) = dummy;
790 if (sym->ns->proc_name->backend_decl == current_function_decl
791 || sym->attr.contained)
792 gfc_add_decl_to_function (decl);
794 gfc_add_decl_to_parent_function (decl);
800 /* Return a constant or a variable to use as a string length. Does not
801 add the decl to the current scope. */
804 gfc_create_string_length (gfc_symbol * sym)
808 gcc_assert (sym->ts.cl);
809 gfc_conv_const_charlen (sym->ts.cl);
811 if (sym->ts.cl->backend_decl == NULL_TREE)
813 char name[GFC_MAX_MANGLED_SYMBOL_LEN + 2];
815 /* Also prefix the mangled name. */
816 strcpy (&name[1], sym->name);
818 length = build_decl (VAR_DECL, get_identifier (name),
819 gfc_charlen_type_node);
820 DECL_ARTIFICIAL (length) = 1;
821 TREE_USED (length) = 1;
822 if (sym->ns->proc_name->tlink != NULL)
823 gfc_defer_symbol_init (sym);
824 sym->ts.cl->backend_decl = length;
827 return sym->ts.cl->backend_decl;
830 /* If a variable is assigned a label, we add another two auxiliary
834 gfc_add_assign_aux_vars (gfc_symbol * sym)
840 gcc_assert (sym->backend_decl);
842 decl = sym->backend_decl;
843 gfc_allocate_lang_decl (decl);
844 GFC_DECL_ASSIGN (decl) = 1;
845 length = build_decl (VAR_DECL, create_tmp_var_name (sym->name),
846 gfc_charlen_type_node);
847 addr = build_decl (VAR_DECL, create_tmp_var_name (sym->name),
849 gfc_finish_var_decl (length, sym);
850 gfc_finish_var_decl (addr, sym);
851 /* STRING_LENGTH is also used as flag. Less than -1 means that
852 ASSIGN_ADDR can not be used. Equal -1 means that ASSIGN_ADDR is the
853 target label's address. Otherwise, value is the length of a format string
854 and ASSIGN_ADDR is its address. */
855 if (TREE_STATIC (length))
856 DECL_INITIAL (length) = build_int_cst (NULL_TREE, -2);
858 gfc_defer_symbol_init (sym);
860 GFC_DECL_STRING_LEN (decl) = length;
861 GFC_DECL_ASSIGN_ADDR (decl) = addr;
864 /* Return the decl for a gfc_symbol, create it if it doesn't already
868 gfc_get_symbol_decl (gfc_symbol * sym)
871 tree length = NULL_TREE;
874 gcc_assert (sym->attr.referenced
875 || sym->ns->proc_name->attr.if_source == IFSRC_IFBODY);
877 if (sym->ns && sym->ns->proc_name->attr.function)
878 byref = gfc_return_by_reference (sym->ns->proc_name);
882 if ((sym->attr.dummy && ! sym->attr.function) || (sym->attr.result && byref))
884 /* Return via extra parameter. */
885 if (sym->attr.result && byref
886 && !sym->backend_decl)
889 DECL_ARGUMENTS (sym->ns->proc_name->backend_decl);
890 /* For entry master function skip over the __entry
892 if (sym->ns->proc_name->attr.entry_master)
893 sym->backend_decl = TREE_CHAIN (sym->backend_decl);
896 /* Dummy variables should already have been created. */
897 gcc_assert (sym->backend_decl);
899 /* Create a character length variable. */
900 if (sym->ts.type == BT_CHARACTER)
902 if (sym->ts.cl->backend_decl == NULL_TREE)
903 length = gfc_create_string_length (sym);
905 length = sym->ts.cl->backend_decl;
906 if (TREE_CODE (length) == VAR_DECL
907 && DECL_CONTEXT (length) == NULL_TREE)
909 /* Add the string length to the same context as the symbol. */
910 if (DECL_CONTEXT (sym->backend_decl) == current_function_decl)
911 gfc_add_decl_to_function (length);
913 gfc_add_decl_to_parent_function (length);
915 gcc_assert (DECL_CONTEXT (sym->backend_decl) ==
916 DECL_CONTEXT (length));
918 gfc_defer_symbol_init (sym);
922 /* Use a copy of the descriptor for dummy arrays. */
923 if (sym->attr.dimension && !TREE_USED (sym->backend_decl))
925 decl = gfc_build_dummy_array_decl (sym, sym->backend_decl);
926 /* Prevent the dummy from being detected as unused if it is copied. */
927 if (sym->backend_decl != NULL && decl != sym->backend_decl)
928 DECL_ARTIFICIAL (sym->backend_decl) = 1;
929 sym->backend_decl = decl;
932 TREE_USED (sym->backend_decl) = 1;
933 if (sym->attr.assign && GFC_DECL_ASSIGN (sym->backend_decl) == 0)
935 gfc_add_assign_aux_vars (sym);
937 return sym->backend_decl;
940 if (sym->backend_decl)
941 return sym->backend_decl;
943 /* Catch function declarations. Only used for actual parameters. */
944 if (sym->attr.flavor == FL_PROCEDURE)
946 decl = gfc_get_extern_function_decl (sym);
950 if (sym->attr.intrinsic)
951 internal_error ("intrinsic variable which isn't a procedure");
953 /* Create string length decl first so that they can be used in the
955 if (sym->ts.type == BT_CHARACTER)
956 length = gfc_create_string_length (sym);
958 /* Create the decl for the variable. */
959 decl = build_decl (VAR_DECL, gfc_sym_identifier (sym), gfc_sym_type (sym));
961 gfc_set_decl_location (decl, &sym->declared_at);
963 /* Symbols from modules should have their assembler names mangled.
964 This is done here rather than in gfc_finish_var_decl because it
965 is different for string length variables. */
967 SET_DECL_ASSEMBLER_NAME (decl, gfc_sym_mangled_identifier (sym));
969 if (sym->attr.dimension)
971 /* Create variables to hold the non-constant bits of array info. */
972 gfc_build_qualified_array (decl, sym);
974 /* Remember this variable for allocation/cleanup. */
975 gfc_defer_symbol_init (sym);
977 if ((sym->attr.allocatable || !sym->attr.dummy) && !sym->attr.pointer)
978 GFC_DECL_PACKED_ARRAY (decl) = 1;
981 if (sym->ts.type == BT_DERIVED && sym->ts.derived->attr.alloc_comp)
982 gfc_defer_symbol_init (sym);
984 gfc_finish_var_decl (decl, sym);
986 if (sym->ts.type == BT_CHARACTER)
988 /* Character variables need special handling. */
989 gfc_allocate_lang_decl (decl);
991 if (TREE_CODE (length) != INTEGER_CST)
993 char name[GFC_MAX_MANGLED_SYMBOL_LEN + 2];
997 /* Also prefix the mangled name for symbols from modules. */
998 strcpy (&name[1], sym->name);
1001 IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (length)));
1002 SET_DECL_ASSEMBLER_NAME (decl, get_identifier (name));
1004 gfc_finish_var_decl (length, sym);
1005 gcc_assert (!sym->value);
1008 sym->backend_decl = decl;
1010 if (sym->attr.assign)
1012 gfc_add_assign_aux_vars (sym);
1015 if (TREE_STATIC (decl) && !sym->attr.use_assoc)
1017 /* Add static initializer. */
1018 DECL_INITIAL (decl) = gfc_conv_initializer (sym->value, &sym->ts,
1019 TREE_TYPE (decl), sym->attr.dimension,
1020 sym->attr.pointer || sym->attr.allocatable);
1027 /* Substitute a temporary variable in place of the real one. */
1030 gfc_shadow_sym (gfc_symbol * sym, tree decl, gfc_saved_var * save)
1032 save->attr = sym->attr;
1033 save->decl = sym->backend_decl;
1035 gfc_clear_attr (&sym->attr);
1036 sym->attr.referenced = 1;
1037 sym->attr.flavor = FL_VARIABLE;
1039 sym->backend_decl = decl;
1043 /* Restore the original variable. */
1046 gfc_restore_sym (gfc_symbol * sym, gfc_saved_var * save)
1048 sym->attr = save->attr;
1049 sym->backend_decl = save->decl;
1053 /* Get a basic decl for an external function. */
1056 gfc_get_extern_function_decl (gfc_symbol * sym)
1061 gfc_intrinsic_sym *isym;
1063 char s[GFC_MAX_SYMBOL_LEN + 13]; /* "f2c_specific" and '\0'. */
1067 if (sym->backend_decl)
1068 return sym->backend_decl;
1070 /* We should never be creating external decls for alternate entry points.
1071 The procedure may be an alternate entry point, but we don't want/need
1073 gcc_assert (!(sym->attr.entry || sym->attr.entry_master));
1075 if (sym->attr.intrinsic)
1077 /* Call the resolution function to get the actual name. This is
1078 a nasty hack which relies on the resolution functions only looking
1079 at the first argument. We pass NULL for the second argument
1080 otherwise things like AINT get confused. */
1081 isym = gfc_find_function (sym->name);
1082 gcc_assert (isym->resolve.f0 != NULL);
1084 memset (&e, 0, sizeof (e));
1085 e.expr_type = EXPR_FUNCTION;
1087 memset (&argexpr, 0, sizeof (argexpr));
1088 gcc_assert (isym->formal);
1089 argexpr.ts = isym->formal->ts;
1091 if (isym->formal->next == NULL)
1092 isym->resolve.f1 (&e, &argexpr);
1095 if (isym->formal->next->next == NULL)
1096 isym->resolve.f2 (&e, &argexpr, NULL);
1099 /* All specific intrinsics take less than 4 arguments. */
1100 gcc_assert (isym->formal->next->next->next == NULL);
1101 isym->resolve.f3 (&e, &argexpr, NULL, NULL);
1105 if (gfc_option.flag_f2c
1106 && ((e.ts.type == BT_REAL && e.ts.kind == gfc_default_real_kind)
1107 || e.ts.type == BT_COMPLEX))
1109 /* Specific which needs a different implementation if f2c
1110 calling conventions are used. */
1111 sprintf (s, "f2c_specific%s", e.value.function.name);
1114 sprintf (s, "specific%s", e.value.function.name);
1116 name = get_identifier (s);
1117 mangled_name = name;
1121 name = gfc_sym_identifier (sym);
1122 mangled_name = gfc_sym_mangled_function_id (sym);
1125 type = gfc_get_function_type (sym);
1126 fndecl = build_decl (FUNCTION_DECL, name, type);
1128 SET_DECL_ASSEMBLER_NAME (fndecl, mangled_name);
1129 /* If the return type is a pointer, avoid alias issues by setting
1130 DECL_IS_MALLOC to nonzero. This means that the function should be
1131 treated as if it were a malloc, meaning it returns a pointer that
1133 if (POINTER_TYPE_P (type))
1134 DECL_IS_MALLOC (fndecl) = 1;
1136 /* Set the context of this decl. */
1137 if (0 && sym->ns && sym->ns->proc_name)
1139 /* TODO: Add external decls to the appropriate scope. */
1140 DECL_CONTEXT (fndecl) = sym->ns->proc_name->backend_decl;
1144 /* Global declaration, e.g. intrinsic subroutine. */
1145 DECL_CONTEXT (fndecl) = NULL_TREE;
1148 DECL_EXTERNAL (fndecl) = 1;
1150 /* This specifies if a function is globally addressable, i.e. it is
1151 the opposite of declaring static in C. */
1152 TREE_PUBLIC (fndecl) = 1;
1154 /* Set attributes for PURE functions. A call to PURE function in the
1155 Fortran 95 sense is both pure and without side effects in the C
1157 if (sym->attr.pure || sym->attr.elemental)
1159 if (sym->attr.function && !gfc_return_by_reference (sym))
1160 DECL_IS_PURE (fndecl) = 1;
1161 /* TODO: check if pure SUBROUTINEs don't have INTENT(OUT)
1162 parameters and don't use alternate returns (is this
1163 allowed?). In that case, calls to them are meaningless, and
1164 can be optimized away. See also in build_function_decl(). */
1165 TREE_SIDE_EFFECTS (fndecl) = 0;
1168 /* Mark non-returning functions. */
1169 if (sym->attr.noreturn)
1170 TREE_THIS_VOLATILE(fndecl) = 1;
1172 sym->backend_decl = fndecl;
1174 if (DECL_CONTEXT (fndecl) == NULL_TREE)
1175 pushdecl_top_level (fndecl);
1181 /* Create a declaration for a procedure. For external functions (in the C
1182 sense) use gfc_get_extern_function_decl. HAS_ENTRIES is true if this is
1183 a master function with alternate entry points. */
1186 build_function_decl (gfc_symbol * sym)
1189 symbol_attribute attr;
1191 gfc_formal_arglist *f;
1193 gcc_assert (!sym->backend_decl);
1194 gcc_assert (!sym->attr.external);
1196 /* Set the line and filename. sym->declared_at seems to point to the
1197 last statement for subroutines, but it'll do for now. */
1198 gfc_set_backend_locus (&sym->declared_at);
1200 /* Allow only one nesting level. Allow public declarations. */
1201 gcc_assert (current_function_decl == NULL_TREE
1202 || DECL_CONTEXT (current_function_decl) == NULL_TREE);
1204 type = gfc_get_function_type (sym);
1205 fndecl = build_decl (FUNCTION_DECL, gfc_sym_identifier (sym), type);
1207 /* Perform name mangling if this is a top level or module procedure. */
1208 if (current_function_decl == NULL_TREE)
1209 SET_DECL_ASSEMBLER_NAME (fndecl, gfc_sym_mangled_function_id (sym));
1211 /* Figure out the return type of the declared function, and build a
1212 RESULT_DECL for it. If this is a subroutine with alternate
1213 returns, build a RESULT_DECL for it. */
1216 result_decl = NULL_TREE;
1217 /* TODO: Shouldn't this just be TREE_TYPE (TREE_TYPE (fndecl)). */
1220 if (gfc_return_by_reference (sym))
1221 type = void_type_node;
1224 if (sym->result != sym)
1225 result_decl = gfc_sym_identifier (sym->result);
1227 type = TREE_TYPE (TREE_TYPE (fndecl));
1232 /* Look for alternate return placeholders. */
1233 int has_alternate_returns = 0;
1234 for (f = sym->formal; f; f = f->next)
1238 has_alternate_returns = 1;
1243 if (has_alternate_returns)
1244 type = integer_type_node;
1246 type = void_type_node;
1249 result_decl = build_decl (RESULT_DECL, result_decl, type);
1250 DECL_ARTIFICIAL (result_decl) = 1;
1251 DECL_IGNORED_P (result_decl) = 1;
1252 DECL_CONTEXT (result_decl) = fndecl;
1253 DECL_RESULT (fndecl) = result_decl;
1255 /* Don't call layout_decl for a RESULT_DECL.
1256 layout_decl (result_decl, 0); */
1258 /* If the return type is a pointer, avoid alias issues by setting
1259 DECL_IS_MALLOC to nonzero. This means that the function should be
1260 treated as if it were a malloc, meaning it returns a pointer that
1262 if (POINTER_TYPE_P (type))
1263 DECL_IS_MALLOC (fndecl) = 1;
1265 /* Set up all attributes for the function. */
1266 DECL_CONTEXT (fndecl) = current_function_decl;
1267 DECL_EXTERNAL (fndecl) = 0;
1269 /* This specifies if a function is globally visible, i.e. it is
1270 the opposite of declaring static in C. */
1271 if (DECL_CONTEXT (fndecl) == NULL_TREE
1272 && !sym->attr.entry_master)
1273 TREE_PUBLIC (fndecl) = 1;
1275 /* TREE_STATIC means the function body is defined here. */
1276 TREE_STATIC (fndecl) = 1;
1278 /* Set attributes for PURE functions. A call to a PURE function in the
1279 Fortran 95 sense is both pure and without side effects in the C
1281 if (attr.pure || attr.elemental)
1283 /* TODO: check if a pure SUBROUTINE has no INTENT(OUT) arguments
1284 including a alternate return. In that case it can also be
1285 marked as PURE. See also in gfc_get_extern_function_decl(). */
1286 if (attr.function && !gfc_return_by_reference (sym))
1287 DECL_IS_PURE (fndecl) = 1;
1288 TREE_SIDE_EFFECTS (fndecl) = 0;
1291 /* Layout the function declaration and put it in the binding level
1292 of the current function. */
1295 sym->backend_decl = fndecl;
1299 /* Create the DECL_ARGUMENTS for a procedure. */
1302 create_function_arglist (gfc_symbol * sym)
1305 gfc_formal_arglist *f;
1306 tree typelist, hidden_typelist;
1307 tree arglist, hidden_arglist;
1311 fndecl = sym->backend_decl;
1313 /* Build formal argument list. Make sure that their TREE_CONTEXT is
1314 the new FUNCTION_DECL node. */
1315 arglist = NULL_TREE;
1316 hidden_arglist = NULL_TREE;
1317 typelist = TYPE_ARG_TYPES (TREE_TYPE (fndecl));
1319 if (sym->attr.entry_master)
1321 type = TREE_VALUE (typelist);
1322 parm = build_decl (PARM_DECL, get_identifier ("__entry"), type);
1324 DECL_CONTEXT (parm) = fndecl;
1325 DECL_ARG_TYPE (parm) = type;
1326 TREE_READONLY (parm) = 1;
1327 gfc_finish_decl (parm, NULL_TREE);
1328 DECL_ARTIFICIAL (parm) = 1;
1330 arglist = chainon (arglist, parm);
1331 typelist = TREE_CHAIN (typelist);
1334 if (gfc_return_by_reference (sym))
1336 tree type = TREE_VALUE (typelist), length = NULL;
1338 if (sym->ts.type == BT_CHARACTER)
1340 /* Length of character result. */
1341 tree len_type = TREE_VALUE (TREE_CHAIN (typelist));
1342 gcc_assert (len_type == gfc_charlen_type_node);
1344 length = build_decl (PARM_DECL,
1345 get_identifier (".__result"),
1347 if (!sym->ts.cl->length)
1349 sym->ts.cl->backend_decl = length;
1350 TREE_USED (length) = 1;
1352 gcc_assert (TREE_CODE (length) == PARM_DECL);
1353 DECL_CONTEXT (length) = fndecl;
1354 DECL_ARG_TYPE (length) = len_type;
1355 TREE_READONLY (length) = 1;
1356 DECL_ARTIFICIAL (length) = 1;
1357 gfc_finish_decl (length, NULL_TREE);
1358 if (sym->ts.cl->backend_decl == NULL
1359 || sym->ts.cl->backend_decl == length)
1364 if (sym->ts.cl->backend_decl == NULL)
1366 tree len = build_decl (VAR_DECL,
1367 get_identifier ("..__result"),
1368 gfc_charlen_type_node);
1369 DECL_ARTIFICIAL (len) = 1;
1370 TREE_USED (len) = 1;
1371 sym->ts.cl->backend_decl = len;
1374 /* Make sure PARM_DECL type doesn't point to incomplete type. */
1375 arg = sym->result ? sym->result : sym;
1376 backend_decl = arg->backend_decl;
1377 /* Temporary clear it, so that gfc_sym_type creates complete
1379 arg->backend_decl = NULL;
1380 type = gfc_sym_type (arg);
1381 arg->backend_decl = backend_decl;
1382 type = build_reference_type (type);
1386 parm = build_decl (PARM_DECL, get_identifier ("__result"), type);
1388 DECL_CONTEXT (parm) = fndecl;
1389 DECL_ARG_TYPE (parm) = TREE_VALUE (typelist);
1390 TREE_READONLY (parm) = 1;
1391 DECL_ARTIFICIAL (parm) = 1;
1392 gfc_finish_decl (parm, NULL_TREE);
1394 arglist = chainon (arglist, parm);
1395 typelist = TREE_CHAIN (typelist);
1397 if (sym->ts.type == BT_CHARACTER)
1399 gfc_allocate_lang_decl (parm);
1400 arglist = chainon (arglist, length);
1401 typelist = TREE_CHAIN (typelist);
1405 hidden_typelist = typelist;
1406 for (f = sym->formal; f; f = f->next)
1407 if (f->sym != NULL) /* Ignore alternate returns. */
1408 hidden_typelist = TREE_CHAIN (hidden_typelist);
1410 for (f = sym->formal; f; f = f->next)
1412 char name[GFC_MAX_SYMBOL_LEN + 2];
1414 /* Ignore alternate returns. */
1418 type = TREE_VALUE (typelist);
1420 if (f->sym->ts.type == BT_CHARACTER)
1422 tree len_type = TREE_VALUE (hidden_typelist);
1423 tree length = NULL_TREE;
1424 gcc_assert (len_type == gfc_charlen_type_node);
1426 strcpy (&name[1], f->sym->name);
1428 length = build_decl (PARM_DECL, get_identifier (name), len_type);
1430 hidden_arglist = chainon (hidden_arglist, length);
1431 DECL_CONTEXT (length) = fndecl;
1432 DECL_ARTIFICIAL (length) = 1;
1433 DECL_ARG_TYPE (length) = len_type;
1434 TREE_READONLY (length) = 1;
1435 gfc_finish_decl (length, NULL_TREE);
1437 /* TODO: Check string lengths when -fbounds-check. */
1439 /* Use the passed value for assumed length variables. */
1440 if (!f->sym->ts.cl->length)
1442 TREE_USED (length) = 1;
1443 if (!f->sym->ts.cl->backend_decl)
1444 f->sym->ts.cl->backend_decl = length;
1447 /* there is already another variable using this
1448 gfc_charlen node, build a new one for this variable
1449 and chain it into the list of gfc_charlens.
1450 This happens for e.g. in the case
1452 since CHARACTER declarations on the same line share
1453 the same gfc_charlen node. */
1456 cl = gfc_get_charlen ();
1457 cl->backend_decl = length;
1458 cl->next = f->sym->ts.cl->next;
1459 f->sym->ts.cl->next = cl;
1464 hidden_typelist = TREE_CHAIN (hidden_typelist);
1466 if (f->sym->ts.cl->backend_decl == NULL
1467 || f->sym->ts.cl->backend_decl == length)
1469 if (f->sym->ts.cl->backend_decl == NULL)
1470 gfc_create_string_length (f->sym);
1472 /* Make sure PARM_DECL type doesn't point to incomplete type. */
1473 if (f->sym->attr.flavor == FL_PROCEDURE)
1474 type = build_pointer_type (gfc_get_function_type (f->sym));
1476 type = gfc_sym_type (f->sym);
1480 /* For non-constant length array arguments, make sure they use
1481 a different type node from TYPE_ARG_TYPES type. */
1482 if (f->sym->attr.dimension
1483 && type == TREE_VALUE (typelist)
1484 && TREE_CODE (type) == POINTER_TYPE
1485 && GFC_ARRAY_TYPE_P (type)
1486 && f->sym->as->type != AS_ASSUMED_SIZE
1487 && ! COMPLETE_TYPE_P (TREE_TYPE (type)))
1489 if (f->sym->attr.flavor == FL_PROCEDURE)
1490 type = build_pointer_type (gfc_get_function_type (f->sym));
1492 type = gfc_sym_type (f->sym);
1495 /* Build a the argument declaration. */
1496 parm = build_decl (PARM_DECL, gfc_sym_identifier (f->sym), type);
1498 /* Fill in arg stuff. */
1499 DECL_CONTEXT (parm) = fndecl;
1500 DECL_ARG_TYPE (parm) = TREE_VALUE (typelist);
1501 /* All implementation args are read-only. */
1502 TREE_READONLY (parm) = 1;
1504 gfc_finish_decl (parm, NULL_TREE);
1506 f->sym->backend_decl = parm;
1508 arglist = chainon (arglist, parm);
1509 typelist = TREE_CHAIN (typelist);
1512 /* Add the hidden string length parameters. */
1513 arglist = chainon (arglist, hidden_arglist);
1515 gcc_assert (TREE_VALUE (hidden_typelist) == void_type_node);
1516 DECL_ARGUMENTS (fndecl) = arglist;
1519 /* Convert FNDECL's code to GIMPLE and handle any nested functions. */
1522 gfc_gimplify_function (tree fndecl)
1524 struct cgraph_node *cgn;
1526 gimplify_function_tree (fndecl);
1527 dump_function (TDI_generic, fndecl);
1529 /* Generate errors for structured block violations. */
1530 /* ??? Could be done as part of resolve_labels. */
1532 diagnose_omp_structured_block_errors (fndecl);
1534 /* Convert all nested functions to GIMPLE now. We do things in this order
1535 so that items like VLA sizes are expanded properly in the context of the
1536 correct function. */
1537 cgn = cgraph_node (fndecl);
1538 for (cgn = cgn->nested; cgn; cgn = cgn->next_nested)
1539 gfc_gimplify_function (cgn->decl);
1543 /* Do the setup necessary before generating the body of a function. */
1546 trans_function_start (gfc_symbol * sym)
1550 fndecl = sym->backend_decl;
1552 /* Let GCC know the current scope is this function. */
1553 current_function_decl = fndecl;
1555 /* Let the world know what we're about to do. */
1556 announce_function (fndecl);
1558 if (DECL_CONTEXT (fndecl) == NULL_TREE)
1560 /* Create RTL for function declaration. */
1561 rest_of_decl_compilation (fndecl, 1, 0);
1564 /* Create RTL for function definition. */
1565 make_decl_rtl (fndecl);
1567 init_function_start (fndecl);
1569 /* Even though we're inside a function body, we still don't want to
1570 call expand_expr to calculate the size of a variable-sized array.
1571 We haven't necessarily assigned RTL to all variables yet, so it's
1572 not safe to try to expand expressions involving them. */
1573 cfun->x_dont_save_pending_sizes_p = 1;
1575 /* function.c requires a push at the start of the function. */
1579 /* Create thunks for alternate entry points. */
1582 build_entry_thunks (gfc_namespace * ns)
1584 gfc_formal_arglist *formal;
1585 gfc_formal_arglist *thunk_formal;
1587 gfc_symbol *thunk_sym;
1595 /* This should always be a toplevel function. */
1596 gcc_assert (current_function_decl == NULL_TREE);
1598 gfc_get_backend_locus (&old_loc);
1599 for (el = ns->entries; el; el = el->next)
1601 thunk_sym = el->sym;
1603 build_function_decl (thunk_sym);
1604 create_function_arglist (thunk_sym);
1606 trans_function_start (thunk_sym);
1608 thunk_fndecl = thunk_sym->backend_decl;
1610 gfc_start_block (&body);
1612 /* Pass extra parameter identifying this entry point. */
1613 tmp = build_int_cst (gfc_array_index_type, el->id);
1614 args = tree_cons (NULL_TREE, tmp, NULL_TREE);
1615 string_args = NULL_TREE;
1617 if (thunk_sym->attr.function)
1619 if (gfc_return_by_reference (ns->proc_name))
1621 tree ref = DECL_ARGUMENTS (current_function_decl);
1622 args = tree_cons (NULL_TREE, ref, args);
1623 if (ns->proc_name->ts.type == BT_CHARACTER)
1624 args = tree_cons (NULL_TREE, TREE_CHAIN (ref),
1629 for (formal = ns->proc_name->formal; formal; formal = formal->next)
1631 /* Ignore alternate returns. */
1632 if (formal->sym == NULL)
1635 /* We don't have a clever way of identifying arguments, so resort to
1636 a brute-force search. */
1637 for (thunk_formal = thunk_sym->formal;
1639 thunk_formal = thunk_formal->next)
1641 if (thunk_formal->sym == formal->sym)
1647 /* Pass the argument. */
1648 DECL_ARTIFICIAL (thunk_formal->sym->backend_decl) = 1;
1649 args = tree_cons (NULL_TREE, thunk_formal->sym->backend_decl,
1651 if (formal->sym->ts.type == BT_CHARACTER)
1653 tmp = thunk_formal->sym->ts.cl->backend_decl;
1654 string_args = tree_cons (NULL_TREE, tmp, string_args);
1659 /* Pass NULL for a missing argument. */
1660 args = tree_cons (NULL_TREE, null_pointer_node, args);
1661 if (formal->sym->ts.type == BT_CHARACTER)
1663 tmp = build_int_cst (gfc_charlen_type_node, 0);
1664 string_args = tree_cons (NULL_TREE, tmp, string_args);
1669 /* Call the master function. */
1670 args = nreverse (args);
1671 args = chainon (args, nreverse (string_args));
1672 tmp = ns->proc_name->backend_decl;
1673 tmp = build_function_call_expr (tmp, args);
1674 if (ns->proc_name->attr.mixed_entry_master)
1676 tree union_decl, field;
1677 tree master_type = TREE_TYPE (ns->proc_name->backend_decl);
1679 union_decl = build_decl (VAR_DECL, get_identifier ("__result"),
1680 TREE_TYPE (master_type));
1681 DECL_ARTIFICIAL (union_decl) = 1;
1682 DECL_EXTERNAL (union_decl) = 0;
1683 TREE_PUBLIC (union_decl) = 0;
1684 TREE_USED (union_decl) = 1;
1685 layout_decl (union_decl, 0);
1686 pushdecl (union_decl);
1688 DECL_CONTEXT (union_decl) = current_function_decl;
1689 tmp = build2 (MODIFY_EXPR,
1690 TREE_TYPE (union_decl),
1692 gfc_add_expr_to_block (&body, tmp);
1694 for (field = TYPE_FIELDS (TREE_TYPE (union_decl));
1695 field; field = TREE_CHAIN (field))
1696 if (strcmp (IDENTIFIER_POINTER (DECL_NAME (field)),
1697 thunk_sym->result->name) == 0)
1699 gcc_assert (field != NULL_TREE);
1700 tmp = build3 (COMPONENT_REF, TREE_TYPE (field), union_decl, field,
1702 tmp = build2 (MODIFY_EXPR,
1703 TREE_TYPE (DECL_RESULT (current_function_decl)),
1704 DECL_RESULT (current_function_decl), tmp);
1705 tmp = build1_v (RETURN_EXPR, tmp);
1707 else if (TREE_TYPE (DECL_RESULT (current_function_decl))
1710 tmp = build2 (MODIFY_EXPR,
1711 TREE_TYPE (DECL_RESULT (current_function_decl)),
1712 DECL_RESULT (current_function_decl), tmp);
1713 tmp = build1_v (RETURN_EXPR, tmp);
1715 gfc_add_expr_to_block (&body, tmp);
1717 /* Finish off this function and send it for code generation. */
1718 DECL_SAVED_TREE (thunk_fndecl) = gfc_finish_block (&body);
1720 BLOCK_SUPERCONTEXT (DECL_INITIAL (thunk_fndecl)) = thunk_fndecl;
1722 /* Output the GENERIC tree. */
1723 dump_function (TDI_original, thunk_fndecl);
1725 /* Store the end of the function, so that we get good line number
1726 info for the epilogue. */
1727 cfun->function_end_locus = input_location;
1729 /* We're leaving the context of this function, so zap cfun.
1730 It's still in DECL_STRUCT_FUNCTION, and we'll restore it in
1731 tree_rest_of_compilation. */
1734 current_function_decl = NULL_TREE;
1736 gfc_gimplify_function (thunk_fndecl);
1737 cgraph_finalize_function (thunk_fndecl, false);
1739 /* We share the symbols in the formal argument list with other entry
1740 points and the master function. Clear them so that they are
1741 recreated for each function. */
1742 for (formal = thunk_sym->formal; formal; formal = formal->next)
1743 if (formal->sym != NULL) /* Ignore alternate returns. */
1745 formal->sym->backend_decl = NULL_TREE;
1746 if (formal->sym->ts.type == BT_CHARACTER)
1747 formal->sym->ts.cl->backend_decl = NULL_TREE;
1750 if (thunk_sym->attr.function)
1752 if (thunk_sym->ts.type == BT_CHARACTER)
1753 thunk_sym->ts.cl->backend_decl = NULL_TREE;
1754 if (thunk_sym->result->ts.type == BT_CHARACTER)
1755 thunk_sym->result->ts.cl->backend_decl = NULL_TREE;
1759 gfc_set_backend_locus (&old_loc);
1763 /* Create a decl for a function, and create any thunks for alternate entry
1767 gfc_create_function_decl (gfc_namespace * ns)
1769 /* Create a declaration for the master function. */
1770 build_function_decl (ns->proc_name);
1772 /* Compile the entry thunks. */
1774 build_entry_thunks (ns);
1776 /* Now create the read argument list. */
1777 create_function_arglist (ns->proc_name);
1780 /* Return the decl used to hold the function return value. If
1781 parent_flag is set, the context is the parent_scope*/
1784 gfc_get_fake_result_decl (gfc_symbol * sym, int parent_flag)
1788 tree this_fake_result_decl;
1789 tree this_function_decl;
1791 char name[GFC_MAX_SYMBOL_LEN + 10];
1795 this_fake_result_decl = parent_fake_result_decl;
1796 this_function_decl = DECL_CONTEXT (current_function_decl);
1800 this_fake_result_decl = current_fake_result_decl;
1801 this_function_decl = current_function_decl;
1805 && sym->ns->proc_name->backend_decl == this_function_decl
1806 && sym->ns->proc_name->attr.entry_master
1807 && sym != sym->ns->proc_name)
1810 if (this_fake_result_decl != NULL)
1811 for (t = TREE_CHAIN (this_fake_result_decl); t; t = TREE_CHAIN (t))
1812 if (strcmp (IDENTIFIER_POINTER (TREE_PURPOSE (t)), sym->name) == 0)
1815 return TREE_VALUE (t);
1816 decl = gfc_get_fake_result_decl (sym->ns->proc_name, parent_flag);
1819 this_fake_result_decl = parent_fake_result_decl;
1821 this_fake_result_decl = current_fake_result_decl;
1823 if (decl && sym->ns->proc_name->attr.mixed_entry_master)
1827 for (field = TYPE_FIELDS (TREE_TYPE (decl));
1828 field; field = TREE_CHAIN (field))
1829 if (strcmp (IDENTIFIER_POINTER (DECL_NAME (field)),
1833 gcc_assert (field != NULL_TREE);
1834 decl = build3 (COMPONENT_REF, TREE_TYPE (field), decl, field,
1838 var = create_tmp_var_raw (TREE_TYPE (decl), sym->name);
1840 gfc_add_decl_to_parent_function (var);
1842 gfc_add_decl_to_function (var);
1844 SET_DECL_VALUE_EXPR (var, decl);
1845 DECL_HAS_VALUE_EXPR_P (var) = 1;
1846 GFC_DECL_RESULT (var) = 1;
1848 TREE_CHAIN (this_fake_result_decl)
1849 = tree_cons (get_identifier (sym->name), var,
1850 TREE_CHAIN (this_fake_result_decl));
1854 if (this_fake_result_decl != NULL_TREE)
1855 return TREE_VALUE (this_fake_result_decl);
1857 /* Only when gfc_get_fake_result_decl is called by gfc_trans_return,
1862 if (sym->ts.type == BT_CHARACTER)
1864 if (sym->ts.cl->backend_decl == NULL_TREE)
1865 length = gfc_create_string_length (sym);
1867 length = sym->ts.cl->backend_decl;
1868 if (TREE_CODE (length) == VAR_DECL
1869 && DECL_CONTEXT (length) == NULL_TREE)
1870 gfc_add_decl_to_function (length);
1873 if (gfc_return_by_reference (sym))
1875 decl = DECL_ARGUMENTS (this_function_decl);
1877 if (sym->ns->proc_name->backend_decl == this_function_decl
1878 && sym->ns->proc_name->attr.entry_master)
1879 decl = TREE_CHAIN (decl);
1881 TREE_USED (decl) = 1;
1883 decl = gfc_build_dummy_array_decl (sym, decl);
1887 sprintf (name, "__result_%.20s",
1888 IDENTIFIER_POINTER (DECL_NAME (this_function_decl)));
1890 decl = build_decl (VAR_DECL, get_identifier (name),
1891 TREE_TYPE (TREE_TYPE (this_function_decl)));
1893 DECL_ARTIFICIAL (decl) = 1;
1894 DECL_EXTERNAL (decl) = 0;
1895 TREE_PUBLIC (decl) = 0;
1896 TREE_USED (decl) = 1;
1897 GFC_DECL_RESULT (decl) = 1;
1898 TREE_ADDRESSABLE (decl) = 1;
1900 layout_decl (decl, 0);
1903 gfc_add_decl_to_parent_function (decl);
1905 gfc_add_decl_to_function (decl);
1909 parent_fake_result_decl = build_tree_list (NULL, decl);
1911 current_fake_result_decl = build_tree_list (NULL, decl);
1917 /* Builds a function decl. The remaining parameters are the types of the
1918 function arguments. Negative nargs indicates a varargs function. */
1921 gfc_build_library_function_decl (tree name, tree rettype, int nargs, ...)
1930 /* Library functions must be declared with global scope. */
1931 gcc_assert (current_function_decl == NULL_TREE);
1933 va_start (p, nargs);
1936 /* Create a list of the argument types. */
1937 for (arglist = NULL_TREE, n = abs (nargs); n > 0; n--)
1939 argtype = va_arg (p, tree);
1940 arglist = gfc_chainon_list (arglist, argtype);
1945 /* Terminate the list. */
1946 arglist = gfc_chainon_list (arglist, void_type_node);
1949 /* Build the function type and decl. */
1950 fntype = build_function_type (rettype, arglist);
1951 fndecl = build_decl (FUNCTION_DECL, name, fntype);
1953 /* Mark this decl as external. */
1954 DECL_EXTERNAL (fndecl) = 1;
1955 TREE_PUBLIC (fndecl) = 1;
1961 rest_of_decl_compilation (fndecl, 1, 0);
1967 gfc_build_intrinsic_function_decls (void)
1969 tree gfc_int4_type_node = gfc_get_int_type (4);
1970 tree gfc_int8_type_node = gfc_get_int_type (8);
1971 tree gfc_int16_type_node = gfc_get_int_type (16);
1972 tree gfc_logical4_type_node = gfc_get_logical_type (4);
1973 tree gfc_real4_type_node = gfc_get_real_type (4);
1974 tree gfc_real8_type_node = gfc_get_real_type (8);
1975 tree gfc_real10_type_node = gfc_get_real_type (10);
1976 tree gfc_real16_type_node = gfc_get_real_type (16);
1977 tree gfc_complex4_type_node = gfc_get_complex_type (4);
1978 tree gfc_complex8_type_node = gfc_get_complex_type (8);
1979 tree gfc_complex10_type_node = gfc_get_complex_type (10);
1980 tree gfc_complex16_type_node = gfc_get_complex_type (16);
1981 tree gfc_c_int_type_node = gfc_get_int_type (gfc_c_int_kind);
1983 /* String functions. */
1984 gfor_fndecl_compare_string =
1985 gfc_build_library_function_decl (get_identifier (PREFIX("compare_string")),
1988 gfc_charlen_type_node, pchar_type_node,
1989 gfc_charlen_type_node, pchar_type_node);
1991 gfor_fndecl_concat_string =
1992 gfc_build_library_function_decl (get_identifier (PREFIX("concat_string")),
1995 gfc_charlen_type_node, pchar_type_node,
1996 gfc_charlen_type_node, pchar_type_node,
1997 gfc_charlen_type_node, pchar_type_node);
1999 gfor_fndecl_string_len_trim =
2000 gfc_build_library_function_decl (get_identifier (PREFIX("string_len_trim")),
2002 2, gfc_charlen_type_node,
2005 gfor_fndecl_string_index =
2006 gfc_build_library_function_decl (get_identifier (PREFIX("string_index")),
2008 5, gfc_charlen_type_node, pchar_type_node,
2009 gfc_charlen_type_node, pchar_type_node,
2010 gfc_logical4_type_node);
2012 gfor_fndecl_string_scan =
2013 gfc_build_library_function_decl (get_identifier (PREFIX("string_scan")),
2015 5, gfc_charlen_type_node, pchar_type_node,
2016 gfc_charlen_type_node, pchar_type_node,
2017 gfc_logical4_type_node);
2019 gfor_fndecl_string_verify =
2020 gfc_build_library_function_decl (get_identifier (PREFIX("string_verify")),
2022 5, gfc_charlen_type_node, pchar_type_node,
2023 gfc_charlen_type_node, pchar_type_node,
2024 gfc_logical4_type_node);
2026 gfor_fndecl_string_trim =
2027 gfc_build_library_function_decl (get_identifier (PREFIX("string_trim")),
2030 build_pointer_type (gfc_charlen_type_node),
2032 gfc_charlen_type_node,
2035 gfor_fndecl_string_repeat =
2036 gfc_build_library_function_decl (get_identifier (PREFIX("string_repeat")),
2040 gfc_charlen_type_node,
2042 gfc_int4_type_node);
2044 gfor_fndecl_ttynam =
2045 gfc_build_library_function_decl (get_identifier (PREFIX("ttynam")),
2049 gfc_charlen_type_node,
2050 gfc_c_int_type_node);
2053 gfc_build_library_function_decl (get_identifier (PREFIX("fdate")),
2057 gfc_charlen_type_node);
2060 gfc_build_library_function_decl (get_identifier (PREFIX("ctime")),
2064 gfc_charlen_type_node,
2065 gfc_int8_type_node);
2067 gfor_fndecl_adjustl =
2068 gfc_build_library_function_decl (get_identifier (PREFIX("adjustl")),
2072 gfc_charlen_type_node, pchar_type_node);
2074 gfor_fndecl_adjustr =
2075 gfc_build_library_function_decl (get_identifier (PREFIX("adjustr")),
2079 gfc_charlen_type_node, pchar_type_node);
2081 gfor_fndecl_si_kind =
2082 gfc_build_library_function_decl (get_identifier ("selected_int_kind"),
2087 gfor_fndecl_sr_kind =
2088 gfc_build_library_function_decl (get_identifier ("selected_real_kind"),
2093 /* Power functions. */
2095 tree ctype, rtype, itype, jtype;
2096 int rkind, ikind, jkind;
2099 static int ikinds[NIKINDS] = {4, 8, 16};
2100 static int rkinds[NRKINDS] = {4, 8, 10, 16};
2101 char name[PREFIX_LEN + 12]; /* _gfortran_pow_?n_?n */
2103 for (ikind=0; ikind < NIKINDS; ikind++)
2105 itype = gfc_get_int_type (ikinds[ikind]);
2107 for (jkind=0; jkind < NIKINDS; jkind++)
2109 jtype = gfc_get_int_type (ikinds[jkind]);
2112 sprintf(name, PREFIX("pow_i%d_i%d"), ikinds[ikind],
2114 gfor_fndecl_math_powi[jkind][ikind].integer =
2115 gfc_build_library_function_decl (get_identifier (name),
2116 jtype, 2, jtype, itype);
2120 for (rkind = 0; rkind < NRKINDS; rkind ++)
2122 rtype = gfc_get_real_type (rkinds[rkind]);
2125 sprintf(name, PREFIX("pow_r%d_i%d"), rkinds[rkind],
2127 gfor_fndecl_math_powi[rkind][ikind].real =
2128 gfc_build_library_function_decl (get_identifier (name),
2129 rtype, 2, rtype, itype);
2132 ctype = gfc_get_complex_type (rkinds[rkind]);
2135 sprintf(name, PREFIX("pow_c%d_i%d"), rkinds[rkind],
2137 gfor_fndecl_math_powi[rkind][ikind].cmplx =
2138 gfc_build_library_function_decl (get_identifier (name),
2139 ctype, 2,ctype, itype);
2147 gfor_fndecl_math_cpowf =
2148 gfc_build_library_function_decl (get_identifier ("cpowf"),
2149 gfc_complex4_type_node,
2150 1, gfc_complex4_type_node);
2151 gfor_fndecl_math_cpow =
2152 gfc_build_library_function_decl (get_identifier ("cpow"),
2153 gfc_complex8_type_node,
2154 1, gfc_complex8_type_node);
2155 if (gfc_complex10_type_node)
2156 gfor_fndecl_math_cpowl10 =
2157 gfc_build_library_function_decl (get_identifier ("cpowl"),
2158 gfc_complex10_type_node, 1,
2159 gfc_complex10_type_node);
2160 if (gfc_complex16_type_node)
2161 gfor_fndecl_math_cpowl16 =
2162 gfc_build_library_function_decl (get_identifier ("cpowl"),
2163 gfc_complex16_type_node, 1,
2164 gfc_complex16_type_node);
2166 gfor_fndecl_math_ishftc4 =
2167 gfc_build_library_function_decl (get_identifier (PREFIX("ishftc4")),
2169 3, gfc_int4_type_node,
2170 gfc_int4_type_node, gfc_int4_type_node);
2171 gfor_fndecl_math_ishftc8 =
2172 gfc_build_library_function_decl (get_identifier (PREFIX("ishftc8")),
2174 3, gfc_int8_type_node,
2175 gfc_int4_type_node, gfc_int4_type_node);
2176 if (gfc_int16_type_node)
2177 gfor_fndecl_math_ishftc16 =
2178 gfc_build_library_function_decl (get_identifier (PREFIX("ishftc16")),
2179 gfc_int16_type_node, 3,
2180 gfc_int16_type_node,
2182 gfc_int4_type_node);
2184 gfor_fndecl_math_exponent4 =
2185 gfc_build_library_function_decl (get_identifier (PREFIX("exponent_r4")),
2187 1, gfc_real4_type_node);
2188 gfor_fndecl_math_exponent8 =
2189 gfc_build_library_function_decl (get_identifier (PREFIX("exponent_r8")),
2191 1, gfc_real8_type_node);
2192 if (gfc_real10_type_node)
2193 gfor_fndecl_math_exponent10 =
2194 gfc_build_library_function_decl (get_identifier (PREFIX("exponent_r10")),
2195 gfc_int4_type_node, 1,
2196 gfc_real10_type_node);
2197 if (gfc_real16_type_node)
2198 gfor_fndecl_math_exponent16 =
2199 gfc_build_library_function_decl (get_identifier (PREFIX("exponent_r16")),
2200 gfc_int4_type_node, 1,
2201 gfc_real16_type_node);
2203 /* BLAS functions. */
2205 tree pint = build_pointer_type (gfc_c_int_type_node);
2206 tree ps = build_pointer_type (gfc_get_real_type (gfc_default_real_kind));
2207 tree pd = build_pointer_type (gfc_get_real_type (gfc_default_double_kind));
2208 tree pc = build_pointer_type (gfc_get_complex_type (gfc_default_real_kind));
2209 tree pz = build_pointer_type
2210 (gfc_get_complex_type (gfc_default_double_kind));
2212 gfor_fndecl_sgemm = gfc_build_library_function_decl
2214 (gfc_option.flag_underscoring ? "sgemm_"
2216 void_type_node, 15, pchar_type_node,
2217 pchar_type_node, pint, pint, pint, ps, ps, pint,
2218 ps, pint, ps, ps, pint, gfc_c_int_type_node,
2219 gfc_c_int_type_node);
2220 gfor_fndecl_dgemm = gfc_build_library_function_decl
2222 (gfc_option.flag_underscoring ? "dgemm_"
2224 void_type_node, 15, pchar_type_node,
2225 pchar_type_node, pint, pint, pint, pd, pd, pint,
2226 pd, pint, pd, pd, pint, gfc_c_int_type_node,
2227 gfc_c_int_type_node);
2228 gfor_fndecl_cgemm = gfc_build_library_function_decl
2230 (gfc_option.flag_underscoring ? "cgemm_"
2232 void_type_node, 15, pchar_type_node,
2233 pchar_type_node, pint, pint, pint, pc, pc, pint,
2234 pc, pint, pc, pc, pint, gfc_c_int_type_node,
2235 gfc_c_int_type_node);
2236 gfor_fndecl_zgemm = gfc_build_library_function_decl
2238 (gfc_option.flag_underscoring ? "zgemm_"
2240 void_type_node, 15, pchar_type_node,
2241 pchar_type_node, pint, pint, pint, pz, pz, pint,
2242 pz, pint, pz, pz, pint, gfc_c_int_type_node,
2243 gfc_c_int_type_node);
2246 /* Other functions. */
2248 gfc_build_library_function_decl (get_identifier (PREFIX("size0")),
2249 gfc_array_index_type,
2250 1, pvoid_type_node);
2252 gfc_build_library_function_decl (get_identifier (PREFIX("size1")),
2253 gfc_array_index_type,
2255 gfc_array_index_type);
2258 gfc_build_library_function_decl (get_identifier (PREFIX ("iargc")),
2264 /* Make prototypes for runtime library functions. */
2267 gfc_build_builtin_function_decls (void)
2269 tree gfc_c_int_type_node = gfc_get_int_type (gfc_c_int_kind);
2270 tree gfc_int4_type_node = gfc_get_int_type (4);
2271 tree gfc_int8_type_node = gfc_get_int_type (8);
2272 tree gfc_logical4_type_node = gfc_get_logical_type (4);
2273 tree gfc_pint4_type_node = build_pointer_type (gfc_int4_type_node);
2275 /* Treat these two internal malloc wrappers as malloc. */
2276 gfor_fndecl_internal_malloc =
2277 gfc_build_library_function_decl (get_identifier (PREFIX("internal_malloc")),
2278 pvoid_type_node, 1, gfc_int4_type_node);
2279 DECL_IS_MALLOC (gfor_fndecl_internal_malloc) = 1;
2281 gfor_fndecl_internal_malloc64 =
2282 gfc_build_library_function_decl (get_identifier
2283 (PREFIX("internal_malloc64")),
2284 pvoid_type_node, 1, gfc_int8_type_node);
2285 DECL_IS_MALLOC (gfor_fndecl_internal_malloc64) = 1;
2287 gfor_fndecl_internal_realloc =
2288 gfc_build_library_function_decl (get_identifier
2289 (PREFIX("internal_realloc")),
2290 pvoid_type_node, 2, pvoid_type_node,
2291 gfc_int4_type_node);
2293 gfor_fndecl_internal_realloc64 =
2294 gfc_build_library_function_decl (get_identifier
2295 (PREFIX("internal_realloc64")),
2296 pvoid_type_node, 2, pvoid_type_node,
2297 gfc_int8_type_node);
2299 gfor_fndecl_internal_free =
2300 gfc_build_library_function_decl (get_identifier (PREFIX("internal_free")),
2301 void_type_node, 1, pvoid_type_node);
2303 gfor_fndecl_allocate =
2304 gfc_build_library_function_decl (get_identifier (PREFIX("allocate")),
2305 void_type_node, 2, ppvoid_type_node,
2306 gfc_int4_type_node);
2308 gfor_fndecl_allocate64 =
2309 gfc_build_library_function_decl (get_identifier (PREFIX("allocate64")),
2310 void_type_node, 2, ppvoid_type_node,
2311 gfc_int8_type_node);
2313 gfor_fndecl_allocate_array =
2314 gfc_build_library_function_decl (get_identifier (PREFIX("allocate_array")),
2315 void_type_node, 2, ppvoid_type_node,
2316 gfc_int4_type_node);
2318 gfor_fndecl_allocate64_array =
2319 gfc_build_library_function_decl (get_identifier (PREFIX("allocate64_array")),
2320 void_type_node, 2, ppvoid_type_node,
2321 gfc_int8_type_node);
2323 gfor_fndecl_deallocate =
2324 gfc_build_library_function_decl (get_identifier (PREFIX("deallocate")),
2325 void_type_node, 2, ppvoid_type_node,
2326 gfc_pint4_type_node);
2328 gfor_fndecl_stop_numeric =
2329 gfc_build_library_function_decl (get_identifier (PREFIX("stop_numeric")),
2330 void_type_node, 1, gfc_int4_type_node);
2332 /* Stop doesn't return. */
2333 TREE_THIS_VOLATILE (gfor_fndecl_stop_numeric) = 1;
2335 gfor_fndecl_stop_string =
2336 gfc_build_library_function_decl (get_identifier (PREFIX("stop_string")),
2337 void_type_node, 2, pchar_type_node,
2338 gfc_int4_type_node);
2339 /* Stop doesn't return. */
2340 TREE_THIS_VOLATILE (gfor_fndecl_stop_string) = 1;
2342 gfor_fndecl_pause_numeric =
2343 gfc_build_library_function_decl (get_identifier (PREFIX("pause_numeric")),
2344 void_type_node, 1, gfc_int4_type_node);
2346 gfor_fndecl_pause_string =
2347 gfc_build_library_function_decl (get_identifier (PREFIX("pause_string")),
2348 void_type_node, 2, pchar_type_node,
2349 gfc_int4_type_node);
2351 gfor_fndecl_select_string =
2352 gfc_build_library_function_decl (get_identifier (PREFIX("select_string")),
2353 pvoid_type_node, 0);
2355 gfor_fndecl_runtime_error =
2356 gfc_build_library_function_decl (get_identifier (PREFIX("runtime_error")),
2357 void_type_node, 1, pchar_type_node);
2358 /* The runtime_error function does not return. */
2359 TREE_THIS_VOLATILE (gfor_fndecl_runtime_error) = 1;
2361 gfor_fndecl_set_fpe =
2362 gfc_build_library_function_decl (get_identifier (PREFIX("set_fpe")),
2363 void_type_node, 1, gfc_c_int_type_node);
2365 gfor_fndecl_set_std =
2366 gfc_build_library_function_decl (get_identifier (PREFIX("set_std")),
2371 gfc_int4_type_node);
2373 gfor_fndecl_set_convert =
2374 gfc_build_library_function_decl (get_identifier (PREFIX("set_convert")),
2375 void_type_node, 1, gfc_c_int_type_node);
2377 gfor_fndecl_set_record_marker =
2378 gfc_build_library_function_decl (get_identifier (PREFIX("set_record_marker")),
2379 void_type_node, 1, gfc_c_int_type_node);
2381 gfor_fndecl_in_pack = gfc_build_library_function_decl (
2382 get_identifier (PREFIX("internal_pack")),
2383 pvoid_type_node, 1, pvoid_type_node);
2385 gfor_fndecl_in_unpack = gfc_build_library_function_decl (
2386 get_identifier (PREFIX("internal_unpack")),
2387 pvoid_type_node, 1, pvoid_type_node);
2389 gfor_fndecl_associated =
2390 gfc_build_library_function_decl (
2391 get_identifier (PREFIX("associated")),
2392 gfc_logical4_type_node,
2397 gfc_build_intrinsic_function_decls ();
2398 gfc_build_intrinsic_lib_fndecls ();
2399 gfc_build_io_library_fndecls ();
2403 /* Evaluate the length of dummy character variables. */
2406 gfc_trans_dummy_character (gfc_symbol *sym, gfc_charlen *cl, tree fnbody)
2410 gfc_finish_decl (cl->backend_decl, NULL_TREE);
2412 gfc_start_block (&body);
2414 /* Evaluate the string length expression. */
2415 gfc_trans_init_string_length (cl, &body);
2417 gfc_trans_vla_type_sizes (sym, &body);
2419 gfc_add_expr_to_block (&body, fnbody);
2420 return gfc_finish_block (&body);
2424 /* Allocate and cleanup an automatic character variable. */
2427 gfc_trans_auto_character_variable (gfc_symbol * sym, tree fnbody)
2433 gcc_assert (sym->backend_decl);
2434 gcc_assert (sym->ts.cl && sym->ts.cl->length);
2436 gfc_start_block (&body);
2438 /* Evaluate the string length expression. */
2439 gfc_trans_init_string_length (sym->ts.cl, &body);
2441 gfc_trans_vla_type_sizes (sym, &body);
2443 decl = sym->backend_decl;
2445 /* Emit a DECL_EXPR for this variable, which will cause the
2446 gimplifier to allocate storage, and all that good stuff. */
2447 tmp = build1 (DECL_EXPR, TREE_TYPE (decl), decl);
2448 gfc_add_expr_to_block (&body, tmp);
2450 gfc_add_expr_to_block (&body, fnbody);
2451 return gfc_finish_block (&body);
2454 /* Set the initial value of ASSIGN statement auxiliary variable explicitly. */
2457 gfc_trans_assign_aux_var (gfc_symbol * sym, tree fnbody)
2461 gcc_assert (sym->backend_decl);
2462 gfc_start_block (&body);
2464 /* Set the initial value to length. See the comments in
2465 function gfc_add_assign_aux_vars in this file. */
2466 gfc_add_modify_expr (&body, GFC_DECL_STRING_LEN (sym->backend_decl),
2467 build_int_cst (NULL_TREE, -2));
2469 gfc_add_expr_to_block (&body, fnbody);
2470 return gfc_finish_block (&body);
2474 gfc_trans_vla_one_sizepos (tree *tp, stmtblock_t *body)
2476 tree t = *tp, var, val;
2478 if (t == NULL || t == error_mark_node)
2480 if (TREE_CONSTANT (t) || DECL_P (t))
2483 if (TREE_CODE (t) == SAVE_EXPR)
2485 if (SAVE_EXPR_RESOLVED_P (t))
2487 *tp = TREE_OPERAND (t, 0);
2490 val = TREE_OPERAND (t, 0);
2495 var = gfc_create_var_np (TREE_TYPE (t), NULL);
2496 gfc_add_decl_to_function (var);
2497 gfc_add_modify_expr (body, var, val);
2498 if (TREE_CODE (t) == SAVE_EXPR)
2499 TREE_OPERAND (t, 0) = var;
2504 gfc_trans_vla_type_sizes_1 (tree type, stmtblock_t *body)
2508 if (type == NULL || type == error_mark_node)
2511 type = TYPE_MAIN_VARIANT (type);
2513 if (TREE_CODE (type) == INTEGER_TYPE)
2515 gfc_trans_vla_one_sizepos (&TYPE_MIN_VALUE (type), body);
2516 gfc_trans_vla_one_sizepos (&TYPE_MAX_VALUE (type), body);
2518 for (t = TYPE_NEXT_VARIANT (type); t; t = TYPE_NEXT_VARIANT (t))
2520 TYPE_MIN_VALUE (t) = TYPE_MIN_VALUE (type);
2521 TYPE_MAX_VALUE (t) = TYPE_MAX_VALUE (type);
2524 else if (TREE_CODE (type) == ARRAY_TYPE)
2526 gfc_trans_vla_type_sizes_1 (TREE_TYPE (type), body);
2527 gfc_trans_vla_type_sizes_1 (TYPE_DOMAIN (type), body);
2528 gfc_trans_vla_one_sizepos (&TYPE_SIZE (type), body);
2529 gfc_trans_vla_one_sizepos (&TYPE_SIZE_UNIT (type), body);
2531 for (t = TYPE_NEXT_VARIANT (type); t; t = TYPE_NEXT_VARIANT (t))
2533 TYPE_SIZE (t) = TYPE_SIZE (type);
2534 TYPE_SIZE_UNIT (t) = TYPE_SIZE_UNIT (type);
2539 /* Make sure all type sizes and array domains are either constant,
2540 or variable or parameter decls. This is a simplified variant
2541 of gimplify_type_sizes, but we can't use it here, as none of the
2542 variables in the expressions have been gimplified yet.
2543 As type sizes and domains for various variable length arrays
2544 contain VAR_DECLs that are only initialized at gfc_trans_deferred_vars
2545 time, without this routine gimplify_type_sizes in the middle-end
2546 could result in the type sizes being gimplified earlier than where
2547 those variables are initialized. */
2550 gfc_trans_vla_type_sizes (gfc_symbol *sym, stmtblock_t *body)
2552 tree type = TREE_TYPE (sym->backend_decl);
2554 if (TREE_CODE (type) == FUNCTION_TYPE
2555 && (sym->attr.function || sym->attr.result || sym->attr.entry))
2557 if (! current_fake_result_decl)
2560 type = TREE_TYPE (TREE_VALUE (current_fake_result_decl));
2563 while (POINTER_TYPE_P (type))
2564 type = TREE_TYPE (type);
2566 if (GFC_DESCRIPTOR_TYPE_P (type))
2568 tree etype = GFC_TYPE_ARRAY_DATAPTR_TYPE (type);
2570 while (POINTER_TYPE_P (etype))
2571 etype = TREE_TYPE (etype);
2573 gfc_trans_vla_type_sizes_1 (etype, body);
2576 gfc_trans_vla_type_sizes_1 (type, body);
2580 /* Generate function entry and exit code, and add it to the function body.
2582 Allocation and initialization of array variables.
2583 Allocation of character string variables.
2584 Initialization and possibly repacking of dummy arrays.
2585 Initialization of ASSIGN statement auxiliary variable. */
2588 gfc_trans_deferred_vars (gfc_symbol * proc_sym, tree fnbody)
2592 gfc_formal_arglist *f;
2594 bool seen_trans_deferred_array = false;
2596 /* Deal with implicit return variables. Explicit return variables will
2597 already have been added. */
2598 if (gfc_return_by_reference (proc_sym) && proc_sym->result == proc_sym)
2600 if (!current_fake_result_decl)
2602 gfc_entry_list *el = NULL;
2603 if (proc_sym->attr.entry_master)
2605 for (el = proc_sym->ns->entries; el; el = el->next)
2606 if (el->sym != el->sym->result)
2610 warning (0, "Function does not return a value");
2612 else if (proc_sym->as)
2614 tree result = TREE_VALUE (current_fake_result_decl);
2615 fnbody = gfc_trans_dummy_array_bias (proc_sym, result, fnbody);
2617 /* An automatic character length, pointer array result. */
2618 if (proc_sym->ts.type == BT_CHARACTER
2619 && TREE_CODE (proc_sym->ts.cl->backend_decl) == VAR_DECL)
2620 fnbody = gfc_trans_dummy_character (proc_sym, proc_sym->ts.cl,
2623 else if (proc_sym->ts.type == BT_CHARACTER)
2625 if (TREE_CODE (proc_sym->ts.cl->backend_decl) == VAR_DECL)
2626 fnbody = gfc_trans_dummy_character (proc_sym, proc_sym->ts.cl,
2630 gcc_assert (gfc_option.flag_f2c
2631 && proc_sym->ts.type == BT_COMPLEX);
2634 for (sym = proc_sym->tlink; sym != proc_sym; sym = sym->tlink)
2636 bool sym_has_alloc_comp = (sym->ts.type == BT_DERIVED)
2637 && sym->ts.derived->attr.alloc_comp;
2638 if (sym->attr.dimension)
2640 switch (sym->as->type)
2643 if (sym->attr.dummy || sym->attr.result)
2645 gfc_trans_dummy_array_bias (sym, sym->backend_decl, fnbody);
2646 else if (sym->attr.pointer || sym->attr.allocatable)
2648 if (TREE_STATIC (sym->backend_decl))
2649 gfc_trans_static_array_pointer (sym);
2652 seen_trans_deferred_array = true;
2653 fnbody = gfc_trans_deferred_array (sym, fnbody);
2658 if (sym_has_alloc_comp)
2660 seen_trans_deferred_array = true;
2661 fnbody = gfc_trans_deferred_array (sym, fnbody);
2664 gfc_get_backend_locus (&loc);
2665 gfc_set_backend_locus (&sym->declared_at);
2666 fnbody = gfc_trans_auto_array_allocation (sym->backend_decl,
2668 gfc_set_backend_locus (&loc);
2672 case AS_ASSUMED_SIZE:
2673 /* Must be a dummy parameter. */
2674 gcc_assert (sym->attr.dummy);
2676 /* We should always pass assumed size arrays the g77 way. */
2677 fnbody = gfc_trans_g77_array (sym, fnbody);
2680 case AS_ASSUMED_SHAPE:
2681 /* Must be a dummy parameter. */
2682 gcc_assert (sym->attr.dummy);
2684 fnbody = gfc_trans_dummy_array_bias (sym, sym->backend_decl,
2689 seen_trans_deferred_array = true;
2690 fnbody = gfc_trans_deferred_array (sym, fnbody);
2696 if (sym_has_alloc_comp && !seen_trans_deferred_array)
2697 fnbody = gfc_trans_deferred_array (sym, fnbody);
2699 else if (sym_has_alloc_comp)
2700 fnbody = gfc_trans_deferred_array (sym, fnbody);
2701 else if (sym->ts.type == BT_CHARACTER)
2703 gfc_get_backend_locus (&loc);
2704 gfc_set_backend_locus (&sym->declared_at);
2705 if (sym->attr.dummy || sym->attr.result)
2706 fnbody = gfc_trans_dummy_character (sym, sym->ts.cl, fnbody);
2708 fnbody = gfc_trans_auto_character_variable (sym, fnbody);
2709 gfc_set_backend_locus (&loc);
2711 else if (sym->attr.assign)
2713 gfc_get_backend_locus (&loc);
2714 gfc_set_backend_locus (&sym->declared_at);
2715 fnbody = gfc_trans_assign_aux_var (sym, fnbody);
2716 gfc_set_backend_locus (&loc);
2722 gfc_init_block (&body);
2724 for (f = proc_sym->formal; f; f = f->next)
2725 if (f->sym && f->sym->tlink == NULL && f->sym->ts.type == BT_CHARACTER)
2727 gcc_assert (f->sym->ts.cl->backend_decl != NULL);
2728 if (TREE_CODE (f->sym->ts.cl->backend_decl) == PARM_DECL)
2729 gfc_trans_vla_type_sizes (f->sym, &body);
2732 if (gfc_return_by_reference (proc_sym) && proc_sym->ts.type == BT_CHARACTER
2733 && current_fake_result_decl != NULL)
2735 gcc_assert (proc_sym->ts.cl->backend_decl != NULL);
2736 if (TREE_CODE (proc_sym->ts.cl->backend_decl) == PARM_DECL)
2737 gfc_trans_vla_type_sizes (proc_sym, &body);
2740 gfc_add_expr_to_block (&body, fnbody);
2741 return gfc_finish_block (&body);
2745 /* Output an initialized decl for a module variable. */
2748 gfc_create_module_variable (gfc_symbol * sym)
2752 /* Module functions with alternate entries are dealt with later and
2753 would get caught by the next condition. */
2754 if (sym->attr.entry)
2757 /* Only output symbols from this module. */
2758 if (sym->ns != module_namespace)
2760 /* I don't think this should ever happen. */
2761 internal_error ("module symbol %s in wrong namespace", sym->name);
2764 /* Only output variables and array valued parameters. */
2765 if (sym->attr.flavor != FL_VARIABLE
2766 && (sym->attr.flavor != FL_PARAMETER || sym->attr.dimension == 0))
2769 /* Don't generate variables from other modules. Variables from
2770 COMMONs will already have been generated. */
2771 if (sym->attr.use_assoc || sym->attr.in_common)
2774 /* Equivalenced variables arrive here after creation. */
2775 if (sym->backend_decl
2776 && (sym->equiv_built || sym->attr.in_equivalence))
2779 if (sym->backend_decl)
2780 internal_error ("backend decl for module variable %s already exists",
2783 /* We always want module variables to be created. */
2784 sym->attr.referenced = 1;
2785 /* Create the decl. */
2786 decl = gfc_get_symbol_decl (sym);
2788 /* Create the variable. */
2790 rest_of_decl_compilation (decl, 1, 0);
2792 /* Also add length of strings. */
2793 if (sym->ts.type == BT_CHARACTER)
2797 length = sym->ts.cl->backend_decl;
2798 if (!INTEGER_CST_P (length))
2801 rest_of_decl_compilation (length, 1, 0);
2807 /* Generate all the required code for module variables. */
2810 gfc_generate_module_vars (gfc_namespace * ns)
2812 module_namespace = ns;
2814 /* Check if the frontend left the namespace in a reasonable state. */
2815 gcc_assert (ns->proc_name && !ns->proc_name->tlink);
2817 /* Generate COMMON blocks. */
2818 gfc_trans_common (ns);
2820 /* Create decls for all the module variables. */
2821 gfc_traverse_ns (ns, gfc_create_module_variable);
2825 gfc_generate_contained_functions (gfc_namespace * parent)
2829 /* We create all the prototypes before generating any code. */
2830 for (ns = parent->contained; ns; ns = ns->sibling)
2832 /* Skip namespaces from used modules. */
2833 if (ns->parent != parent)
2836 gfc_create_function_decl (ns);
2839 for (ns = parent->contained; ns; ns = ns->sibling)
2841 /* Skip namespaces from used modules. */
2842 if (ns->parent != parent)
2845 gfc_generate_function_code (ns);
2850 /* Drill down through expressions for the array specification bounds and
2851 character length calling generate_local_decl for all those variables
2852 that have not already been declared. */
2855 generate_local_decl (gfc_symbol *);
2858 generate_expr_decls (gfc_symbol *sym, gfc_expr *e)
2860 gfc_actual_arglist *arg;
2867 switch (e->expr_type)
2870 for (arg = e->value.function.actual; arg; arg = arg->next)
2871 generate_expr_decls (sym, arg->expr);
2874 /* If the variable is not the same as the dependent, 'sym', and
2875 it is not marked as being declared and it is in the same
2876 namespace as 'sym', add it to the local declarations. */
2878 if (sym == e->symtree->n.sym
2879 || e->symtree->n.sym->mark
2880 || e->symtree->n.sym->ns != sym->ns)
2883 generate_local_decl (e->symtree->n.sym);
2887 generate_expr_decls (sym, e->value.op.op1);
2888 generate_expr_decls (sym, e->value.op.op2);
2897 for (ref = e->ref; ref; ref = ref->next)
2902 for (i = 0; i < ref->u.ar.dimen; i++)
2904 generate_expr_decls (sym, ref->u.ar.start[i]);
2905 generate_expr_decls (sym, ref->u.ar.end[i]);
2906 generate_expr_decls (sym, ref->u.ar.stride[i]);
2911 generate_expr_decls (sym, ref->u.ss.start);
2912 generate_expr_decls (sym, ref->u.ss.end);
2916 if (ref->u.c.component->ts.type == BT_CHARACTER
2917 && ref->u.c.component->ts.cl->length->expr_type
2919 generate_expr_decls (sym, ref->u.c.component->ts.cl->length);
2921 if (ref->u.c.component->as)
2922 for (i = 0; i < ref->u.c.component->as->rank; i++)
2924 generate_expr_decls (sym, ref->u.c.component->as->lower[i]);
2925 generate_expr_decls (sym, ref->u.c.component->as->upper[i]);
2934 /* Check for dependencies in the character length and array spec. */
2937 generate_dependency_declarations (gfc_symbol *sym)
2941 if (sym->ts.type == BT_CHARACTER
2942 && sym->ts.cl->length->expr_type != EXPR_CONSTANT)
2943 generate_expr_decls (sym, sym->ts.cl->length);
2945 if (sym->as && sym->as->rank)
2947 for (i = 0; i < sym->as->rank; i++)
2949 generate_expr_decls (sym, sym->as->lower[i]);
2950 generate_expr_decls (sym, sym->as->upper[i]);
2956 /* Generate decls for all local variables. We do this to ensure correct
2957 handling of expressions which only appear in the specification of
2961 generate_local_decl (gfc_symbol * sym)
2963 if (sym->attr.flavor == FL_VARIABLE)
2965 /* Check for dependencies in the array specification and string
2966 length, adding the necessary declarations to the function. We
2967 mark the symbol now, as well as in traverse_ns, to prevent
2968 getting stuck in a circular dependency. */
2970 if (!sym->attr.dummy && !sym->ns->proc_name->attr.entry_master)
2971 generate_dependency_declarations (sym);
2973 if (sym->attr.referenced)
2974 gfc_get_symbol_decl (sym);
2975 else if (sym->attr.dummy && warn_unused_parameter)
2976 gfc_warning ("Unused parameter %s declared at %L", sym->name,
2978 /* Warn for unused variables, but not if they're inside a common
2979 block or are use-associated. */
2980 else if (warn_unused_variable
2981 && !(sym->attr.in_common || sym->attr.use_assoc))
2982 gfc_warning ("Unused variable %s declared at %L", sym->name,
2984 /* For variable length CHARACTER parameters, the PARM_DECL already
2985 references the length variable, so force gfc_get_symbol_decl
2986 even when not referenced. If optimize > 0, it will be optimized
2987 away anyway. But do this only after emitting -Wunused-parameter
2988 warning if requested. */
2989 if (sym->attr.dummy && ! sym->attr.referenced
2990 && sym->ts.type == BT_CHARACTER
2991 && sym->ts.cl->backend_decl != NULL
2992 && TREE_CODE (sym->ts.cl->backend_decl) == VAR_DECL)
2994 sym->attr.referenced = 1;
2995 gfc_get_symbol_decl (sym);
3001 generate_local_vars (gfc_namespace * ns)
3003 gfc_traverse_ns (ns, generate_local_decl);
3007 /* Generate a switch statement to jump to the correct entry point. Also
3008 creates the label decls for the entry points. */
3011 gfc_trans_entry_master_switch (gfc_entry_list * el)
3018 gfc_init_block (&block);
3019 for (; el; el = el->next)
3021 /* Add the case label. */
3022 label = gfc_build_label_decl (NULL_TREE);
3023 val = build_int_cst (gfc_array_index_type, el->id);
3024 tmp = build3_v (CASE_LABEL_EXPR, val, NULL_TREE, label);
3025 gfc_add_expr_to_block (&block, tmp);
3027 /* And jump to the actual entry point. */
3028 label = gfc_build_label_decl (NULL_TREE);
3029 tmp = build1_v (GOTO_EXPR, label);
3030 gfc_add_expr_to_block (&block, tmp);
3032 /* Save the label decl. */
3035 tmp = gfc_finish_block (&block);
3036 /* The first argument selects the entry point. */
3037 val = DECL_ARGUMENTS (current_function_decl);
3038 tmp = build3_v (SWITCH_EXPR, val, tmp, NULL_TREE);
3043 /* Generate code for a function. */
3046 gfc_generate_function_code (gfc_namespace * ns)
3059 sym = ns->proc_name;
3061 /* Check that the frontend isn't still using this. */
3062 gcc_assert (sym->tlink == NULL);
3065 /* Create the declaration for functions with global scope. */
3066 if (!sym->backend_decl)
3067 gfc_create_function_decl (ns);
3069 fndecl = sym->backend_decl;
3070 old_context = current_function_decl;
3074 push_function_context ();
3075 saved_parent_function_decls = saved_function_decls;
3076 saved_function_decls = NULL_TREE;
3079 trans_function_start (sym);
3081 gfc_start_block (&block);
3083 if (ns->entries && ns->proc_name->ts.type == BT_CHARACTER)
3085 /* Copy length backend_decls to all entry point result
3090 gfc_conv_const_charlen (ns->proc_name->ts.cl);
3091 backend_decl = ns->proc_name->result->ts.cl->backend_decl;
3092 for (el = ns->entries; el; el = el->next)
3093 el->sym->result->ts.cl->backend_decl = backend_decl;
3096 /* Translate COMMON blocks. */
3097 gfc_trans_common (ns);
3099 /* Null the parent fake result declaration if this namespace is
3100 a module function or an external procedures. */
3101 if ((ns->parent && ns->parent->proc_name->attr.flavor == FL_MODULE)
3102 || ns->parent == NULL)
3103 parent_fake_result_decl = NULL_TREE;
3105 gfc_generate_contained_functions (ns);
3107 generate_local_vars (ns);
3109 /* Keep the parent fake result declaration in module functions
3110 or external procedures. */
3111 if ((ns->parent && ns->parent->proc_name->attr.flavor == FL_MODULE)
3112 || ns->parent == NULL)
3113 current_fake_result_decl = parent_fake_result_decl;
3115 current_fake_result_decl = NULL_TREE;
3117 current_function_return_label = NULL;
3119 /* Now generate the code for the body of this function. */
3120 gfc_init_block (&body);
3122 /* If this is the main program, add a call to set_std to set up the
3123 runtime library Fortran language standard parameters. */
3125 if (sym->attr.is_main_program)
3127 tree arglist, gfc_int4_type_node;
3129 gfc_int4_type_node = gfc_get_int_type (4);
3130 arglist = gfc_chainon_list (NULL_TREE,
3131 build_int_cst (gfc_int4_type_node,
3132 gfc_option.warn_std));
3133 arglist = gfc_chainon_list (arglist,
3134 build_int_cst (gfc_int4_type_node,
3135 gfc_option.allow_std));
3136 arglist = gfc_chainon_list (arglist,
3137 build_int_cst (gfc_int4_type_node,
3139 tmp = build_function_call_expr (gfor_fndecl_set_std, arglist);
3140 gfc_add_expr_to_block (&body, tmp);
3143 /* If this is the main program and a -ffpe-trap option was provided,
3144 add a call to set_fpe so that the library will raise a FPE when
3146 if (sym->attr.is_main_program && gfc_option.fpe != 0)
3148 tree arglist, gfc_c_int_type_node;
3150 gfc_c_int_type_node = gfc_get_int_type (gfc_c_int_kind);
3151 arglist = gfc_chainon_list (NULL_TREE,
3152 build_int_cst (gfc_c_int_type_node,
3154 tmp = build_function_call_expr (gfor_fndecl_set_fpe, arglist);
3155 gfc_add_expr_to_block (&body, tmp);
3158 /* If this is the main program and an -fconvert option was provided,
3159 add a call to set_convert. */
3161 if (sym->attr.is_main_program && gfc_option.convert != CONVERT_NATIVE)
3163 tree arglist, gfc_c_int_type_node;
3165 gfc_c_int_type_node = gfc_get_int_type (gfc_c_int_kind);
3166 arglist = gfc_chainon_list (NULL_TREE,
3167 build_int_cst (gfc_c_int_type_node,
3168 gfc_option.convert));
3169 tmp = build_function_call_expr (gfor_fndecl_set_convert, arglist);
3170 gfc_add_expr_to_block (&body, tmp);
3173 /* If this is the main program and an -frecord-marker option was provided,
3174 add a call to set_record_marker. */
3176 if (sym->attr.is_main_program && gfc_option.record_marker != 0)
3178 tree arglist, gfc_c_int_type_node;
3180 gfc_c_int_type_node = gfc_get_int_type (gfc_c_int_kind);
3181 arglist = gfc_chainon_list (NULL_TREE,
3182 build_int_cst (gfc_c_int_type_node,
3183 gfc_option.record_marker));
3184 tmp = build_function_call_expr (gfor_fndecl_set_record_marker, arglist);
3185 gfc_add_expr_to_block (&body, tmp);
3189 if (TREE_TYPE (DECL_RESULT (fndecl)) != void_type_node
3190 && sym->attr.subroutine)
3192 tree alternate_return;
3193 alternate_return = gfc_get_fake_result_decl (sym, 0);
3194 gfc_add_modify_expr (&body, alternate_return, integer_zero_node);
3199 /* Jump to the correct entry point. */
3200 tmp = gfc_trans_entry_master_switch (ns->entries);
3201 gfc_add_expr_to_block (&body, tmp);
3204 tmp = gfc_trans_code (ns->code);
3205 gfc_add_expr_to_block (&body, tmp);
3207 /* Add a return label if needed. */
3208 if (current_function_return_label)
3210 tmp = build1_v (LABEL_EXPR, current_function_return_label);
3211 gfc_add_expr_to_block (&body, tmp);
3214 tmp = gfc_finish_block (&body);
3215 /* Add code to create and cleanup arrays. */
3216 tmp = gfc_trans_deferred_vars (sym, tmp);
3218 if (TREE_TYPE (DECL_RESULT (fndecl)) != void_type_node)
3220 if (sym->attr.subroutine || sym == sym->result)
3222 if (current_fake_result_decl != NULL)
3223 result = TREE_VALUE (current_fake_result_decl);
3226 current_fake_result_decl = NULL_TREE;
3229 result = sym->result->backend_decl;
3231 if (result != NULL_TREE && sym->attr.function
3232 && sym->ts.type == BT_DERIVED
3233 && sym->ts.derived->attr.alloc_comp)
3235 rank = sym->as ? sym->as->rank : 0;
3236 tmp2 = gfc_nullify_alloc_comp (sym->ts.derived, result, rank);
3237 gfc_add_expr_to_block (&block, tmp2);
3240 gfc_add_expr_to_block (&block, tmp);
3242 if (result == NULL_TREE)
3243 warning (0, "Function return value not set");
3246 /* Set the return value to the dummy result variable. */
3247 tmp = build2 (MODIFY_EXPR, TREE_TYPE (result),
3248 DECL_RESULT (fndecl), result);
3249 tmp = build1_v (RETURN_EXPR, tmp);
3250 gfc_add_expr_to_block (&block, tmp);
3254 gfc_add_expr_to_block (&block, tmp);
3257 /* Add all the decls we created during processing. */
3258 decl = saved_function_decls;
3263 next = TREE_CHAIN (decl);
3264 TREE_CHAIN (decl) = NULL_TREE;
3268 saved_function_decls = NULL_TREE;
3270 DECL_SAVED_TREE (fndecl) = gfc_finish_block (&block);
3272 /* Finish off this function and send it for code generation. */
3274 BLOCK_SUPERCONTEXT (DECL_INITIAL (fndecl)) = fndecl;
3276 /* Output the GENERIC tree. */
3277 dump_function (TDI_original, fndecl);
3279 /* Store the end of the function, so that we get good line number
3280 info for the epilogue. */
3281 cfun->function_end_locus = input_location;
3283 /* We're leaving the context of this function, so zap cfun.
3284 It's still in DECL_STRUCT_FUNCTION, and we'll restore it in
3285 tree_rest_of_compilation. */
3290 pop_function_context ();
3291 saved_function_decls = saved_parent_function_decls;
3293 current_function_decl = old_context;
3295 if (decl_function_context (fndecl))
3296 /* Register this function with cgraph just far enough to get it
3297 added to our parent's nested function list. */
3298 (void) cgraph_node (fndecl);
3301 gfc_gimplify_function (fndecl);
3302 cgraph_finalize_function (fndecl, false);
3307 gfc_generate_constructors (void)
3309 gcc_assert (gfc_static_ctors == NULL_TREE);
3317 if (gfc_static_ctors == NULL_TREE)
3320 fnname = get_file_function_name ("I");
3321 type = build_function_type (void_type_node,
3322 gfc_chainon_list (NULL_TREE, void_type_node));
3324 fndecl = build_decl (FUNCTION_DECL, fnname, type);
3325 TREE_PUBLIC (fndecl) = 1;
3327 decl = build_decl (RESULT_DECL, NULL_TREE, void_type_node);
3328 DECL_ARTIFICIAL (decl) = 1;
3329 DECL_IGNORED_P (decl) = 1;
3330 DECL_CONTEXT (decl) = fndecl;
3331 DECL_RESULT (fndecl) = decl;
3335 current_function_decl = fndecl;
3337 rest_of_decl_compilation (fndecl, 1, 0);
3339 make_decl_rtl (fndecl);
3341 init_function_start (fndecl);
3345 for (; gfc_static_ctors; gfc_static_ctors = TREE_CHAIN (gfc_static_ctors))
3348 build_function_call_expr (TREE_VALUE (gfc_static_ctors), NULL_TREE);
3349 DECL_SAVED_TREE (fndecl) = build_stmt (EXPR_STMT, tmp);
3354 BLOCK_SUPERCONTEXT (DECL_INITIAL (fndecl)) = fndecl;
3356 free_after_parsing (cfun);
3357 free_after_compilation (cfun);
3359 tree_rest_of_compilation (fndecl);
3361 current_function_decl = NULL_TREE;
3365 /* Translates a BLOCK DATA program unit. This means emitting the
3366 commons contained therein plus their initializations. We also emit
3367 a globally visible symbol to make sure that each BLOCK DATA program
3368 unit remains unique. */
3371 gfc_generate_block_data (gfc_namespace * ns)
3376 /* Tell the backend the source location of the block data. */
3378 gfc_set_backend_locus (&ns->proc_name->declared_at);
3380 gfc_set_backend_locus (&gfc_current_locus);
3382 /* Process the DATA statements. */
3383 gfc_trans_common (ns);
3385 /* Create a global symbol with the mane of the block data. This is to
3386 generate linker errors if the same name is used twice. It is never
3389 id = gfc_sym_mangled_function_id (ns->proc_name);
3391 id = get_identifier ("__BLOCK_DATA__");
3393 decl = build_decl (VAR_DECL, id, gfc_array_index_type);
3394 TREE_PUBLIC (decl) = 1;
3395 TREE_STATIC (decl) = 1;
3398 rest_of_decl_compilation (decl, 1, 0);
3402 #include "gt-fortran-trans-decl.h"