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_set_max_subrecord_length;
98 tree gfor_fndecl_ctime;
99 tree gfor_fndecl_fdate;
100 tree gfor_fndecl_ttynam;
101 tree gfor_fndecl_in_pack;
102 tree gfor_fndecl_in_unpack;
103 tree gfor_fndecl_associated;
106 /* Math functions. Many other math functions are handled in
107 trans-intrinsic.c. */
109 gfc_powdecl_list gfor_fndecl_math_powi[4][3];
110 tree gfor_fndecl_math_cpowf;
111 tree gfor_fndecl_math_cpow;
112 tree gfor_fndecl_math_cpowl10;
113 tree gfor_fndecl_math_cpowl16;
114 tree gfor_fndecl_math_ishftc4;
115 tree gfor_fndecl_math_ishftc8;
116 tree gfor_fndecl_math_ishftc16;
117 tree gfor_fndecl_math_exponent4;
118 tree gfor_fndecl_math_exponent8;
119 tree gfor_fndecl_math_exponent10;
120 tree gfor_fndecl_math_exponent16;
123 /* String functions. */
125 tree gfor_fndecl_compare_string;
126 tree gfor_fndecl_concat_string;
127 tree gfor_fndecl_string_len_trim;
128 tree gfor_fndecl_string_index;
129 tree gfor_fndecl_string_scan;
130 tree gfor_fndecl_string_verify;
131 tree gfor_fndecl_string_trim;
132 tree gfor_fndecl_string_repeat;
133 tree gfor_fndecl_adjustl;
134 tree gfor_fndecl_adjustr;
137 /* Other misc. runtime library functions. */
139 tree gfor_fndecl_size0;
140 tree gfor_fndecl_size1;
141 tree gfor_fndecl_iargc;
143 /* Intrinsic functions implemented in FORTRAN. */
144 tree gfor_fndecl_si_kind;
145 tree gfor_fndecl_sr_kind;
147 /* BLAS gemm functions. */
148 tree gfor_fndecl_sgemm;
149 tree gfor_fndecl_dgemm;
150 tree gfor_fndecl_cgemm;
151 tree gfor_fndecl_zgemm;
155 gfc_add_decl_to_parent_function (tree decl)
158 DECL_CONTEXT (decl) = DECL_CONTEXT (current_function_decl);
159 DECL_NONLOCAL (decl) = 1;
160 TREE_CHAIN (decl) = saved_parent_function_decls;
161 saved_parent_function_decls = decl;
165 gfc_add_decl_to_function (tree decl)
168 TREE_USED (decl) = 1;
169 DECL_CONTEXT (decl) = current_function_decl;
170 TREE_CHAIN (decl) = saved_function_decls;
171 saved_function_decls = decl;
175 /* Build a backend label declaration. Set TREE_USED for named labels.
176 The context of the label is always the current_function_decl. All
177 labels are marked artificial. */
180 gfc_build_label_decl (tree label_id)
182 /* 2^32 temporaries should be enough. */
183 static unsigned int tmp_num = 1;
187 if (label_id == NULL_TREE)
189 /* Build an internal label name. */
190 ASM_FORMAT_PRIVATE_NAME (label_name, "L", tmp_num++);
191 label_id = get_identifier (label_name);
196 /* Build the LABEL_DECL node. Labels have no type. */
197 label_decl = build_decl (LABEL_DECL, label_id, void_type_node);
198 DECL_CONTEXT (label_decl) = current_function_decl;
199 DECL_MODE (label_decl) = VOIDmode;
201 /* We always define the label as used, even if the original source
202 file never references the label. We don't want all kinds of
203 spurious warnings for old-style Fortran code with too many
205 TREE_USED (label_decl) = 1;
207 DECL_ARTIFICIAL (label_decl) = 1;
212 /* Returns the return label for the current function. */
215 gfc_get_return_label (void)
217 char name[GFC_MAX_SYMBOL_LEN + 10];
219 if (current_function_return_label)
220 return current_function_return_label;
222 sprintf (name, "__return_%s",
223 IDENTIFIER_POINTER (DECL_NAME (current_function_decl)));
225 current_function_return_label =
226 gfc_build_label_decl (get_identifier (name));
228 DECL_ARTIFICIAL (current_function_return_label) = 1;
230 return current_function_return_label;
234 /* Set the backend source location of a decl. */
237 gfc_set_decl_location (tree decl, locus * loc)
239 #ifdef USE_MAPPED_LOCATION
240 DECL_SOURCE_LOCATION (decl) = loc->lb->location;
242 DECL_SOURCE_LINE (decl) = loc->lb->linenum;
243 DECL_SOURCE_FILE (decl) = loc->lb->file->filename;
248 /* Return the backend label declaration for a given label structure,
249 or create it if it doesn't exist yet. */
252 gfc_get_label_decl (gfc_st_label * lp)
254 if (lp->backend_decl)
255 return lp->backend_decl;
258 char label_name[GFC_MAX_SYMBOL_LEN + 1];
261 /* Validate the label declaration from the front end. */
262 gcc_assert (lp != NULL && lp->value <= MAX_LABEL_VALUE);
264 /* Build a mangled name for the label. */
265 sprintf (label_name, "__label_%.6d", lp->value);
267 /* Build the LABEL_DECL node. */
268 label_decl = gfc_build_label_decl (get_identifier (label_name));
270 /* Tell the debugger where the label came from. */
271 if (lp->value <= MAX_LABEL_VALUE) /* An internal label. */
272 gfc_set_decl_location (label_decl, &lp->where);
274 DECL_ARTIFICIAL (label_decl) = 1;
276 /* Store the label in the label list and return the LABEL_DECL. */
277 lp->backend_decl = label_decl;
283 /* Convert a gfc_symbol to an identifier of the same name. */
286 gfc_sym_identifier (gfc_symbol * sym)
288 return (get_identifier (sym->name));
292 /* Construct mangled name from symbol name. */
295 gfc_sym_mangled_identifier (gfc_symbol * sym)
297 char name[GFC_MAX_MANGLED_SYMBOL_LEN + 1];
299 if (sym->module == NULL)
300 return gfc_sym_identifier (sym);
303 snprintf (name, sizeof name, "__%s__%s", sym->module, sym->name);
304 return get_identifier (name);
309 /* Construct mangled function name from symbol name. */
312 gfc_sym_mangled_function_id (gfc_symbol * sym)
315 char name[GFC_MAX_MANGLED_SYMBOL_LEN + 1];
317 if (sym->module == NULL || sym->attr.proc == PROC_EXTERNAL
318 || (sym->module != NULL && sym->attr.if_source == IFSRC_IFBODY))
320 if (strcmp (sym->name, "MAIN__") == 0
321 || sym->attr.proc == PROC_INTRINSIC)
322 return get_identifier (sym->name);
324 if (gfc_option.flag_underscoring)
326 has_underscore = strchr (sym->name, '_') != 0;
327 if (gfc_option.flag_second_underscore && has_underscore)
328 snprintf (name, sizeof name, "%s__", sym->name);
330 snprintf (name, sizeof name, "%s_", sym->name);
331 return get_identifier (name);
334 return get_identifier (sym->name);
338 snprintf (name, sizeof name, "__%s__%s", sym->module, sym->name);
339 return get_identifier (name);
344 /* Returns true if a variable of specified size should go on the stack. */
347 gfc_can_put_var_on_stack (tree size)
349 unsigned HOST_WIDE_INT low;
351 if (!INTEGER_CST_P (size))
354 if (gfc_option.flag_max_stack_var_size < 0)
357 if (TREE_INT_CST_HIGH (size) != 0)
360 low = TREE_INT_CST_LOW (size);
361 if (low > (unsigned HOST_WIDE_INT) gfc_option.flag_max_stack_var_size)
364 /* TODO: Set a per-function stack size limit. */
370 /* gfc_finish_cray_pointee sets DECL_VALUE_EXPR for a Cray pointee to
371 an expression involving its corresponding pointer. There are
372 2 cases; one for variable size arrays, and one for everything else,
373 because variable-sized arrays require one fewer level of
377 gfc_finish_cray_pointee (tree decl, gfc_symbol *sym)
379 tree ptr_decl = gfc_get_symbol_decl (sym->cp_pointer);
382 /* Parameters need to be dereferenced. */
383 if (sym->cp_pointer->attr.dummy)
384 ptr_decl = build_fold_indirect_ref (ptr_decl);
386 /* Check to see if we're dealing with a variable-sized array. */
387 if (sym->attr.dimension
388 && TREE_CODE (TREE_TYPE (decl)) == POINTER_TYPE)
390 /* These decls will be dereferenced later, so we don't dereference
392 value = convert (TREE_TYPE (decl), ptr_decl);
396 ptr_decl = convert (build_pointer_type (TREE_TYPE (decl)),
398 value = build_fold_indirect_ref (ptr_decl);
401 SET_DECL_VALUE_EXPR (decl, value);
402 DECL_HAS_VALUE_EXPR_P (decl) = 1;
403 GFC_DECL_CRAY_POINTEE (decl) = 1;
404 /* This is a fake variable just for debugging purposes. */
405 TREE_ASM_WRITTEN (decl) = 1;
409 /* Finish processing of a declaration and install its initial value. */
412 gfc_finish_decl (tree decl, tree init)
414 if (TREE_CODE (decl) == PARM_DECL)
415 gcc_assert (init == NULL_TREE);
416 /* Remember that PARM_DECL doesn't have a DECL_INITIAL field per se
417 -- it overlaps DECL_ARG_TYPE. */
418 else if (init == NULL_TREE)
419 gcc_assert (DECL_INITIAL (decl) == NULL_TREE);
421 gcc_assert (DECL_INITIAL (decl) == error_mark_node);
423 if (init != NULL_TREE)
425 if (TREE_CODE (decl) != TYPE_DECL)
426 DECL_INITIAL (decl) = init;
429 /* typedef foo = bar; store the type of bar as the type of foo. */
430 TREE_TYPE (decl) = TREE_TYPE (init);
431 DECL_INITIAL (decl) = init = 0;
435 if (TREE_CODE (decl) == VAR_DECL)
437 if (DECL_SIZE (decl) == NULL_TREE
438 && TYPE_SIZE (TREE_TYPE (decl)) != NULL_TREE)
439 layout_decl (decl, 0);
441 /* A static variable with an incomplete type is an error if it is
442 initialized. Also if it is not file scope. Otherwise, let it
443 through, but if it is not `extern' then it may cause an error
445 /* An automatic variable with an incomplete type is an error. */
446 if (DECL_SIZE (decl) == NULL_TREE
447 && (TREE_STATIC (decl) ? (DECL_INITIAL (decl) != 0
448 || DECL_CONTEXT (decl) != 0)
449 : !DECL_EXTERNAL (decl)))
451 gfc_fatal_error ("storage size not known");
454 if ((DECL_EXTERNAL (decl) || TREE_STATIC (decl))
455 && (DECL_SIZE (decl) != 0)
456 && (TREE_CODE (DECL_SIZE (decl)) != INTEGER_CST))
458 gfc_fatal_error ("storage size not constant");
465 /* Apply symbol attributes to a variable, and add it to the function scope. */
468 gfc_finish_var_decl (tree decl, gfc_symbol * sym)
470 /* TREE_ADDRESSABLE means the address of this variable is actually needed.
471 This is the equivalent of the TARGET variables.
472 We also need to set this if the variable is passed by reference in a
475 /* Set DECL_VALUE_EXPR for Cray Pointees. */
476 if (sym->attr.cray_pointee)
477 gfc_finish_cray_pointee (decl, sym);
479 if (sym->attr.target)
480 TREE_ADDRESSABLE (decl) = 1;
481 /* If it wasn't used we wouldn't be getting it. */
482 TREE_USED (decl) = 1;
484 /* Chain this decl to the pending declarations. Don't do pushdecl()
485 because this would add them to the current scope rather than the
487 if (current_function_decl != NULL_TREE)
489 if (sym->ns->proc_name->backend_decl == current_function_decl
490 || sym->result == sym)
491 gfc_add_decl_to_function (decl);
493 gfc_add_decl_to_parent_function (decl);
496 if (sym->attr.cray_pointee)
499 /* If a variable is USE associated, it's always external. */
500 if (sym->attr.use_assoc)
502 DECL_EXTERNAL (decl) = 1;
503 TREE_PUBLIC (decl) = 1;
505 else if (sym->module && !sym->attr.result && !sym->attr.dummy)
507 /* TODO: Don't set sym->module for result or dummy variables. */
508 gcc_assert (current_function_decl == NULL_TREE || sym->result == sym);
509 /* This is the declaration of a module variable. */
510 TREE_PUBLIC (decl) = 1;
511 TREE_STATIC (decl) = 1;
514 if ((sym->attr.save || sym->attr.data || sym->value)
515 && !sym->attr.use_assoc)
516 TREE_STATIC (decl) = 1;
518 if (sym->attr.volatile_)
521 TREE_THIS_VOLATILE (decl) = 1;
522 new = build_qualified_type (TREE_TYPE (decl), TYPE_QUAL_VOLATILE);
523 TREE_TYPE (decl) = new;
526 /* Keep variables larger than max-stack-var-size off stack. */
527 if (!sym->ns->proc_name->attr.recursive
528 && INTEGER_CST_P (DECL_SIZE_UNIT (decl))
529 && !gfc_can_put_var_on_stack (DECL_SIZE_UNIT (decl))
530 /* Put variable length auto array pointers always into stack. */
531 && (TREE_CODE (TREE_TYPE (decl)) != POINTER_TYPE
532 || sym->attr.dimension == 0
533 || sym->as->type != AS_EXPLICIT
535 || sym->attr.allocatable)
536 && !DECL_ARTIFICIAL (decl))
537 TREE_STATIC (decl) = 1;
539 /* Handle threadprivate variables. */
540 if (sym->attr.threadprivate && targetm.have_tls
541 && (TREE_STATIC (decl) || DECL_EXTERNAL (decl)))
542 DECL_TLS_MODEL (decl) = decl_default_tls_model (decl);
546 /* Allocate the lang-specific part of a decl. */
549 gfc_allocate_lang_decl (tree decl)
551 DECL_LANG_SPECIFIC (decl) = (struct lang_decl *)
552 ggc_alloc_cleared (sizeof (struct lang_decl));
555 /* Remember a symbol to generate initialization/cleanup code at function
559 gfc_defer_symbol_init (gfc_symbol * sym)
565 /* Don't add a symbol twice. */
569 last = head = sym->ns->proc_name;
572 /* Make sure that setup code for dummy variables which are used in the
573 setup of other variables is generated first. */
576 /* Find the first dummy arg seen after us, or the first non-dummy arg.
577 This is a circular list, so don't go past the head. */
579 && (!p->attr.dummy || p->dummy_order > sym->dummy_order))
585 /* Insert in between last and p. */
591 /* Create an array index type variable with function scope. */
594 create_index_var (const char * pfx, int nest)
598 decl = gfc_create_var_np (gfc_array_index_type, pfx);
600 gfc_add_decl_to_parent_function (decl);
602 gfc_add_decl_to_function (decl);
607 /* Create variables to hold all the non-constant bits of info for a
608 descriptorless array. Remember these in the lang-specific part of the
612 gfc_build_qualified_array (tree decl, gfc_symbol * sym)
618 type = TREE_TYPE (decl);
620 /* We just use the descriptor, if there is one. */
621 if (GFC_DESCRIPTOR_TYPE_P (type))
624 gcc_assert (GFC_ARRAY_TYPE_P (type));
625 nest = (sym->ns->proc_name->backend_decl != current_function_decl)
626 && !sym->attr.contained;
628 for (dim = 0; dim < GFC_TYPE_ARRAY_RANK (type); dim++)
630 if (GFC_TYPE_ARRAY_LBOUND (type, dim) == NULL_TREE)
631 GFC_TYPE_ARRAY_LBOUND (type, dim) = create_index_var ("lbound", nest);
632 /* Don't try to use the unknown bound for assumed shape arrays. */
633 if (GFC_TYPE_ARRAY_UBOUND (type, dim) == NULL_TREE
634 && (sym->as->type != AS_ASSUMED_SIZE
635 || dim < GFC_TYPE_ARRAY_RANK (type) - 1))
636 GFC_TYPE_ARRAY_UBOUND (type, dim) = create_index_var ("ubound", nest);
638 if (GFC_TYPE_ARRAY_STRIDE (type, dim) == NULL_TREE)
639 GFC_TYPE_ARRAY_STRIDE (type, dim) = create_index_var ("stride", nest);
641 if (GFC_TYPE_ARRAY_OFFSET (type) == NULL_TREE)
643 GFC_TYPE_ARRAY_OFFSET (type) = gfc_create_var_np (gfc_array_index_type,
646 gfc_add_decl_to_parent_function (GFC_TYPE_ARRAY_OFFSET (type));
648 gfc_add_decl_to_function (GFC_TYPE_ARRAY_OFFSET (type));
651 if (GFC_TYPE_ARRAY_SIZE (type) == NULL_TREE
652 && sym->as->type != AS_ASSUMED_SIZE)
653 GFC_TYPE_ARRAY_SIZE (type) = create_index_var ("size", nest);
655 if (POINTER_TYPE_P (type))
657 gcc_assert (GFC_ARRAY_TYPE_P (TREE_TYPE (type)));
658 gcc_assert (TYPE_LANG_SPECIFIC (type)
659 == TYPE_LANG_SPECIFIC (TREE_TYPE (type)));
660 type = TREE_TYPE (type);
663 if (! COMPLETE_TYPE_P (type) && GFC_TYPE_ARRAY_SIZE (type))
667 size = build2 (MINUS_EXPR, gfc_array_index_type,
668 GFC_TYPE_ARRAY_SIZE (type), gfc_index_one_node);
669 range = build_range_type (gfc_array_index_type, gfc_index_zero_node,
671 TYPE_DOMAIN (type) = range;
677 /* For some dummy arguments we don't use the actual argument directly.
678 Instead we create a local decl and use that. This allows us to perform
679 initialization, and construct full type information. */
682 gfc_build_dummy_array_decl (gfc_symbol * sym, tree dummy)
692 if (sym->attr.pointer || sym->attr.allocatable)
695 /* Add to list of variables if not a fake result variable. */
696 if (sym->attr.result || sym->attr.dummy)
697 gfc_defer_symbol_init (sym);
699 type = TREE_TYPE (dummy);
700 gcc_assert (TREE_CODE (dummy) == PARM_DECL
701 && POINTER_TYPE_P (type));
703 /* Do we know the element size? */
704 known_size = sym->ts.type != BT_CHARACTER
705 || INTEGER_CST_P (sym->ts.cl->backend_decl);
707 if (known_size && !GFC_DESCRIPTOR_TYPE_P (TREE_TYPE (type)))
709 /* For descriptorless arrays with known element size the actual
710 argument is sufficient. */
711 gcc_assert (GFC_ARRAY_TYPE_P (type));
712 gfc_build_qualified_array (dummy, sym);
716 type = TREE_TYPE (type);
717 if (GFC_DESCRIPTOR_TYPE_P (type))
719 /* Create a descriptorless array pointer. */
722 if (!gfc_option.flag_repack_arrays)
724 if (as->type == AS_ASSUMED_SIZE)
729 if (as->type == AS_EXPLICIT)
732 for (n = 0; n < as->rank; n++)
736 && as->upper[n]->expr_type == EXPR_CONSTANT
737 && as->lower[n]->expr_type == EXPR_CONSTANT))
745 type = gfc_typenode_for_spec (&sym->ts);
746 type = gfc_get_nodesc_array_type (type, sym->as, packed);
750 /* We now have an expression for the element size, so create a fully
751 qualified type. Reset sym->backend decl or this will just return the
753 DECL_ARTIFICIAL (sym->backend_decl) = 1;
754 sym->backend_decl = NULL_TREE;
755 type = gfc_sym_type (sym);
759 ASM_FORMAT_PRIVATE_NAME (name, IDENTIFIER_POINTER (DECL_NAME (dummy)), 0);
760 decl = build_decl (VAR_DECL, get_identifier (name), type);
762 DECL_ARTIFICIAL (decl) = 1;
763 TREE_PUBLIC (decl) = 0;
764 TREE_STATIC (decl) = 0;
765 DECL_EXTERNAL (decl) = 0;
767 /* We should never get deferred shape arrays here. We used to because of
769 gcc_assert (sym->as->type != AS_DEFERRED);
774 GFC_DECL_PARTIAL_PACKED_ARRAY (decl) = 1;
778 GFC_DECL_PACKED_ARRAY (decl) = 1;
782 gfc_build_qualified_array (decl, sym);
784 if (DECL_LANG_SPECIFIC (dummy))
785 DECL_LANG_SPECIFIC (decl) = DECL_LANG_SPECIFIC (dummy);
787 gfc_allocate_lang_decl (decl);
789 GFC_DECL_SAVED_DESCRIPTOR (decl) = dummy;
791 if (sym->ns->proc_name->backend_decl == current_function_decl
792 || sym->attr.contained)
793 gfc_add_decl_to_function (decl);
795 gfc_add_decl_to_parent_function (decl);
801 /* Return a constant or a variable to use as a string length. Does not
802 add the decl to the current scope. */
805 gfc_create_string_length (gfc_symbol * sym)
809 gcc_assert (sym->ts.cl);
810 gfc_conv_const_charlen (sym->ts.cl);
812 if (sym->ts.cl->backend_decl == NULL_TREE)
814 char name[GFC_MAX_MANGLED_SYMBOL_LEN + 2];
816 /* Also prefix the mangled name. */
817 strcpy (&name[1], sym->name);
819 length = build_decl (VAR_DECL, get_identifier (name),
820 gfc_charlen_type_node);
821 DECL_ARTIFICIAL (length) = 1;
822 TREE_USED (length) = 1;
823 if (sym->ns->proc_name->tlink != NULL)
824 gfc_defer_symbol_init (sym);
825 sym->ts.cl->backend_decl = length;
828 return sym->ts.cl->backend_decl;
831 /* If a variable is assigned a label, we add another two auxiliary
835 gfc_add_assign_aux_vars (gfc_symbol * sym)
841 gcc_assert (sym->backend_decl);
843 decl = sym->backend_decl;
844 gfc_allocate_lang_decl (decl);
845 GFC_DECL_ASSIGN (decl) = 1;
846 length = build_decl (VAR_DECL, create_tmp_var_name (sym->name),
847 gfc_charlen_type_node);
848 addr = build_decl (VAR_DECL, create_tmp_var_name (sym->name),
850 gfc_finish_var_decl (length, sym);
851 gfc_finish_var_decl (addr, sym);
852 /* STRING_LENGTH is also used as flag. Less than -1 means that
853 ASSIGN_ADDR can not be used. Equal -1 means that ASSIGN_ADDR is the
854 target label's address. Otherwise, value is the length of a format string
855 and ASSIGN_ADDR is its address. */
856 if (TREE_STATIC (length))
857 DECL_INITIAL (length) = build_int_cst (NULL_TREE, -2);
859 gfc_defer_symbol_init (sym);
861 GFC_DECL_STRING_LEN (decl) = length;
862 GFC_DECL_ASSIGN_ADDR (decl) = addr;
865 /* Return the decl for a gfc_symbol, create it if it doesn't already
869 gfc_get_symbol_decl (gfc_symbol * sym)
872 tree length = NULL_TREE;
875 gcc_assert (sym->attr.referenced
876 || sym->ns->proc_name->attr.if_source == IFSRC_IFBODY);
878 if (sym->ns && sym->ns->proc_name->attr.function)
879 byref = gfc_return_by_reference (sym->ns->proc_name);
883 if ((sym->attr.dummy && ! sym->attr.function) || (sym->attr.result && byref))
885 /* Return via extra parameter. */
886 if (sym->attr.result && byref
887 && !sym->backend_decl)
890 DECL_ARGUMENTS (sym->ns->proc_name->backend_decl);
891 /* For entry master function skip over the __entry
893 if (sym->ns->proc_name->attr.entry_master)
894 sym->backend_decl = TREE_CHAIN (sym->backend_decl);
897 /* Dummy variables should already have been created. */
898 gcc_assert (sym->backend_decl);
900 /* Create a character length variable. */
901 if (sym->ts.type == BT_CHARACTER)
903 if (sym->ts.cl->backend_decl == NULL_TREE)
904 length = gfc_create_string_length (sym);
906 length = sym->ts.cl->backend_decl;
907 if (TREE_CODE (length) == VAR_DECL
908 && DECL_CONTEXT (length) == NULL_TREE)
910 /* Add the string length to the same context as the symbol. */
911 if (DECL_CONTEXT (sym->backend_decl) == current_function_decl)
912 gfc_add_decl_to_function (length);
914 gfc_add_decl_to_parent_function (length);
916 gcc_assert (DECL_CONTEXT (sym->backend_decl) ==
917 DECL_CONTEXT (length));
919 gfc_defer_symbol_init (sym);
923 /* Use a copy of the descriptor for dummy arrays. */
924 if (sym->attr.dimension && !TREE_USED (sym->backend_decl))
926 decl = gfc_build_dummy_array_decl (sym, sym->backend_decl);
927 /* Prevent the dummy from being detected as unused if it is copied. */
928 if (sym->backend_decl != NULL && decl != sym->backend_decl)
929 DECL_ARTIFICIAL (sym->backend_decl) = 1;
930 sym->backend_decl = decl;
933 TREE_USED (sym->backend_decl) = 1;
934 if (sym->attr.assign && GFC_DECL_ASSIGN (sym->backend_decl) == 0)
936 gfc_add_assign_aux_vars (sym);
938 return sym->backend_decl;
941 if (sym->backend_decl)
942 return sym->backend_decl;
944 /* Catch function declarations. Only used for actual parameters. */
945 if (sym->attr.flavor == FL_PROCEDURE)
947 decl = gfc_get_extern_function_decl (sym);
951 if (sym->attr.intrinsic)
952 internal_error ("intrinsic variable which isn't a procedure");
954 /* Create string length decl first so that they can be used in the
956 if (sym->ts.type == BT_CHARACTER)
957 length = gfc_create_string_length (sym);
959 /* Create the decl for the variable. */
960 decl = build_decl (VAR_DECL, gfc_sym_identifier (sym), gfc_sym_type (sym));
962 gfc_set_decl_location (decl, &sym->declared_at);
964 /* Symbols from modules should have their assembler names mangled.
965 This is done here rather than in gfc_finish_var_decl because it
966 is different for string length variables. */
968 SET_DECL_ASSEMBLER_NAME (decl, gfc_sym_mangled_identifier (sym));
970 if (sym->attr.dimension)
972 /* Create variables to hold the non-constant bits of array info. */
973 gfc_build_qualified_array (decl, sym);
975 /* Remember this variable for allocation/cleanup. */
976 gfc_defer_symbol_init (sym);
978 if ((sym->attr.allocatable || !sym->attr.dummy) && !sym->attr.pointer)
979 GFC_DECL_PACKED_ARRAY (decl) = 1;
982 if (sym->ts.type == BT_DERIVED && sym->ts.derived->attr.alloc_comp)
983 gfc_defer_symbol_init (sym);
985 gfc_finish_var_decl (decl, sym);
987 if (sym->ts.type == BT_CHARACTER)
989 /* Character variables need special handling. */
990 gfc_allocate_lang_decl (decl);
992 if (TREE_CODE (length) != INTEGER_CST)
994 char name[GFC_MAX_MANGLED_SYMBOL_LEN + 2];
998 /* Also prefix the mangled name for symbols from modules. */
999 strcpy (&name[1], sym->name);
1002 IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (length)));
1003 SET_DECL_ASSEMBLER_NAME (decl, get_identifier (name));
1005 gfc_finish_var_decl (length, sym);
1006 gcc_assert (!sym->value);
1009 sym->backend_decl = decl;
1011 if (sym->attr.assign)
1012 gfc_add_assign_aux_vars (sym);
1014 if (TREE_STATIC (decl) && !sym->attr.use_assoc)
1016 /* Add static initializer. */
1017 DECL_INITIAL (decl) = gfc_conv_initializer (sym->value, &sym->ts,
1018 TREE_TYPE (decl), sym->attr.dimension,
1019 sym->attr.pointer || sym->attr.allocatable);
1026 /* Substitute a temporary variable in place of the real one. */
1029 gfc_shadow_sym (gfc_symbol * sym, tree decl, gfc_saved_var * save)
1031 save->attr = sym->attr;
1032 save->decl = sym->backend_decl;
1034 gfc_clear_attr (&sym->attr);
1035 sym->attr.referenced = 1;
1036 sym->attr.flavor = FL_VARIABLE;
1038 sym->backend_decl = decl;
1042 /* Restore the original variable. */
1045 gfc_restore_sym (gfc_symbol * sym, gfc_saved_var * save)
1047 sym->attr = save->attr;
1048 sym->backend_decl = save->decl;
1052 /* Get a basic decl for an external function. */
1055 gfc_get_extern_function_decl (gfc_symbol * sym)
1060 gfc_intrinsic_sym *isym;
1062 char s[GFC_MAX_SYMBOL_LEN + 13]; /* "f2c_specific" and '\0'. */
1066 if (sym->backend_decl)
1067 return sym->backend_decl;
1069 /* We should never be creating external decls for alternate entry points.
1070 The procedure may be an alternate entry point, but we don't want/need
1072 gcc_assert (!(sym->attr.entry || sym->attr.entry_master));
1074 if (sym->attr.intrinsic)
1076 /* Call the resolution function to get the actual name. This is
1077 a nasty hack which relies on the resolution functions only looking
1078 at the first argument. We pass NULL for the second argument
1079 otherwise things like AINT get confused. */
1080 isym = gfc_find_function (sym->name);
1081 gcc_assert (isym->resolve.f0 != NULL);
1083 memset (&e, 0, sizeof (e));
1084 e.expr_type = EXPR_FUNCTION;
1086 memset (&argexpr, 0, sizeof (argexpr));
1087 gcc_assert (isym->formal);
1088 argexpr.ts = isym->formal->ts;
1090 if (isym->formal->next == NULL)
1091 isym->resolve.f1 (&e, &argexpr);
1094 if (isym->formal->next->next == NULL)
1095 isym->resolve.f2 (&e, &argexpr, NULL);
1098 /* All specific intrinsics take less than 4 arguments. */
1099 gcc_assert (isym->formal->next->next->next == NULL);
1100 isym->resolve.f3 (&e, &argexpr, NULL, NULL);
1104 if (gfc_option.flag_f2c
1105 && ((e.ts.type == BT_REAL && e.ts.kind == gfc_default_real_kind)
1106 || e.ts.type == BT_COMPLEX))
1108 /* Specific which needs a different implementation if f2c
1109 calling conventions are used. */
1110 sprintf (s, "f2c_specific%s", e.value.function.name);
1113 sprintf (s, "specific%s", e.value.function.name);
1115 name = get_identifier (s);
1116 mangled_name = name;
1120 name = gfc_sym_identifier (sym);
1121 mangled_name = gfc_sym_mangled_function_id (sym);
1124 type = gfc_get_function_type (sym);
1125 fndecl = build_decl (FUNCTION_DECL, name, type);
1127 SET_DECL_ASSEMBLER_NAME (fndecl, mangled_name);
1128 /* If the return type is a pointer, avoid alias issues by setting
1129 DECL_IS_MALLOC to nonzero. This means that the function should be
1130 treated as if it were a malloc, meaning it returns a pointer that
1132 if (POINTER_TYPE_P (type))
1133 DECL_IS_MALLOC (fndecl) = 1;
1135 /* Set the context of this decl. */
1136 if (0 && sym->ns && sym->ns->proc_name)
1138 /* TODO: Add external decls to the appropriate scope. */
1139 DECL_CONTEXT (fndecl) = sym->ns->proc_name->backend_decl;
1143 /* Global declaration, e.g. intrinsic subroutine. */
1144 DECL_CONTEXT (fndecl) = NULL_TREE;
1147 DECL_EXTERNAL (fndecl) = 1;
1149 /* This specifies if a function is globally addressable, i.e. it is
1150 the opposite of declaring static in C. */
1151 TREE_PUBLIC (fndecl) = 1;
1153 /* Set attributes for PURE functions. A call to PURE function in the
1154 Fortran 95 sense is both pure and without side effects in the C
1156 if (sym->attr.pure || sym->attr.elemental)
1158 if (sym->attr.function && !gfc_return_by_reference (sym))
1159 DECL_IS_PURE (fndecl) = 1;
1160 /* TODO: check if pure SUBROUTINEs don't have INTENT(OUT)
1161 parameters and don't use alternate returns (is this
1162 allowed?). In that case, calls to them are meaningless, and
1163 can be optimized away. See also in build_function_decl(). */
1164 TREE_SIDE_EFFECTS (fndecl) = 0;
1167 /* Mark non-returning functions. */
1168 if (sym->attr.noreturn)
1169 TREE_THIS_VOLATILE(fndecl) = 1;
1171 sym->backend_decl = fndecl;
1173 if (DECL_CONTEXT (fndecl) == NULL_TREE)
1174 pushdecl_top_level (fndecl);
1180 /* Create a declaration for a procedure. For external functions (in the C
1181 sense) use gfc_get_extern_function_decl. HAS_ENTRIES is true if this is
1182 a master function with alternate entry points. */
1185 build_function_decl (gfc_symbol * sym)
1188 symbol_attribute attr;
1190 gfc_formal_arglist *f;
1192 gcc_assert (!sym->backend_decl);
1193 gcc_assert (!sym->attr.external);
1195 /* Set the line and filename. sym->declared_at seems to point to the
1196 last statement for subroutines, but it'll do for now. */
1197 gfc_set_backend_locus (&sym->declared_at);
1199 /* Allow only one nesting level. Allow public declarations. */
1200 gcc_assert (current_function_decl == NULL_TREE
1201 || DECL_CONTEXT (current_function_decl) == NULL_TREE);
1203 type = gfc_get_function_type (sym);
1204 fndecl = build_decl (FUNCTION_DECL, gfc_sym_identifier (sym), type);
1206 /* Perform name mangling if this is a top level or module procedure. */
1207 if (current_function_decl == NULL_TREE)
1208 SET_DECL_ASSEMBLER_NAME (fndecl, gfc_sym_mangled_function_id (sym));
1210 /* Figure out the return type of the declared function, and build a
1211 RESULT_DECL for it. If this is a subroutine with alternate
1212 returns, build a RESULT_DECL for it. */
1215 result_decl = NULL_TREE;
1216 /* TODO: Shouldn't this just be TREE_TYPE (TREE_TYPE (fndecl)). */
1219 if (gfc_return_by_reference (sym))
1220 type = void_type_node;
1223 if (sym->result != sym)
1224 result_decl = gfc_sym_identifier (sym->result);
1226 type = TREE_TYPE (TREE_TYPE (fndecl));
1231 /* Look for alternate return placeholders. */
1232 int has_alternate_returns = 0;
1233 for (f = sym->formal; f; f = f->next)
1237 has_alternate_returns = 1;
1242 if (has_alternate_returns)
1243 type = integer_type_node;
1245 type = void_type_node;
1248 result_decl = build_decl (RESULT_DECL, result_decl, type);
1249 DECL_ARTIFICIAL (result_decl) = 1;
1250 DECL_IGNORED_P (result_decl) = 1;
1251 DECL_CONTEXT (result_decl) = fndecl;
1252 DECL_RESULT (fndecl) = result_decl;
1254 /* Don't call layout_decl for a RESULT_DECL.
1255 layout_decl (result_decl, 0); */
1257 /* If the return type is a pointer, avoid alias issues by setting
1258 DECL_IS_MALLOC to nonzero. This means that the function should be
1259 treated as if it were a malloc, meaning it returns a pointer that
1261 if (POINTER_TYPE_P (type))
1262 DECL_IS_MALLOC (fndecl) = 1;
1264 /* Set up all attributes for the function. */
1265 DECL_CONTEXT (fndecl) = current_function_decl;
1266 DECL_EXTERNAL (fndecl) = 0;
1268 /* This specifies if a function is globally visible, i.e. it is
1269 the opposite of declaring static in C. */
1270 if (DECL_CONTEXT (fndecl) == NULL_TREE
1271 && !sym->attr.entry_master)
1272 TREE_PUBLIC (fndecl) = 1;
1274 /* TREE_STATIC means the function body is defined here. */
1275 TREE_STATIC (fndecl) = 1;
1277 /* Set attributes for PURE functions. A call to a PURE function in the
1278 Fortran 95 sense is both pure and without side effects in the C
1280 if (attr.pure || attr.elemental)
1282 /* TODO: check if a pure SUBROUTINE has no INTENT(OUT) arguments
1283 including a alternate return. In that case it can also be
1284 marked as PURE. See also in gfc_get_extern_function_decl(). */
1285 if (attr.function && !gfc_return_by_reference (sym))
1286 DECL_IS_PURE (fndecl) = 1;
1287 TREE_SIDE_EFFECTS (fndecl) = 0;
1290 /* Layout the function declaration and put it in the binding level
1291 of the current function. */
1294 sym->backend_decl = fndecl;
1298 /* Create the DECL_ARGUMENTS for a procedure. */
1301 create_function_arglist (gfc_symbol * sym)
1304 gfc_formal_arglist *f;
1305 tree typelist, hidden_typelist;
1306 tree arglist, hidden_arglist;
1310 fndecl = sym->backend_decl;
1312 /* Build formal argument list. Make sure that their TREE_CONTEXT is
1313 the new FUNCTION_DECL node. */
1314 arglist = NULL_TREE;
1315 hidden_arglist = NULL_TREE;
1316 typelist = TYPE_ARG_TYPES (TREE_TYPE (fndecl));
1318 if (sym->attr.entry_master)
1320 type = TREE_VALUE (typelist);
1321 parm = build_decl (PARM_DECL, get_identifier ("__entry"), type);
1323 DECL_CONTEXT (parm) = fndecl;
1324 DECL_ARG_TYPE (parm) = type;
1325 TREE_READONLY (parm) = 1;
1326 gfc_finish_decl (parm, NULL_TREE);
1327 DECL_ARTIFICIAL (parm) = 1;
1329 arglist = chainon (arglist, parm);
1330 typelist = TREE_CHAIN (typelist);
1333 if (gfc_return_by_reference (sym))
1335 tree type = TREE_VALUE (typelist), length = NULL;
1337 if (sym->ts.type == BT_CHARACTER)
1339 /* Length of character result. */
1340 tree len_type = TREE_VALUE (TREE_CHAIN (typelist));
1341 gcc_assert (len_type == gfc_charlen_type_node);
1343 length = build_decl (PARM_DECL,
1344 get_identifier (".__result"),
1346 if (!sym->ts.cl->length)
1348 sym->ts.cl->backend_decl = length;
1349 TREE_USED (length) = 1;
1351 gcc_assert (TREE_CODE (length) == PARM_DECL);
1352 DECL_CONTEXT (length) = fndecl;
1353 DECL_ARG_TYPE (length) = len_type;
1354 TREE_READONLY (length) = 1;
1355 DECL_ARTIFICIAL (length) = 1;
1356 gfc_finish_decl (length, NULL_TREE);
1357 if (sym->ts.cl->backend_decl == NULL
1358 || sym->ts.cl->backend_decl == length)
1363 if (sym->ts.cl->backend_decl == NULL)
1365 tree len = build_decl (VAR_DECL,
1366 get_identifier ("..__result"),
1367 gfc_charlen_type_node);
1368 DECL_ARTIFICIAL (len) = 1;
1369 TREE_USED (len) = 1;
1370 sym->ts.cl->backend_decl = len;
1373 /* Make sure PARM_DECL type doesn't point to incomplete type. */
1374 arg = sym->result ? sym->result : sym;
1375 backend_decl = arg->backend_decl;
1376 /* Temporary clear it, so that gfc_sym_type creates complete
1378 arg->backend_decl = NULL;
1379 type = gfc_sym_type (arg);
1380 arg->backend_decl = backend_decl;
1381 type = build_reference_type (type);
1385 parm = build_decl (PARM_DECL, get_identifier ("__result"), type);
1387 DECL_CONTEXT (parm) = fndecl;
1388 DECL_ARG_TYPE (parm) = TREE_VALUE (typelist);
1389 TREE_READONLY (parm) = 1;
1390 DECL_ARTIFICIAL (parm) = 1;
1391 gfc_finish_decl (parm, NULL_TREE);
1393 arglist = chainon (arglist, parm);
1394 typelist = TREE_CHAIN (typelist);
1396 if (sym->ts.type == BT_CHARACTER)
1398 gfc_allocate_lang_decl (parm);
1399 arglist = chainon (arglist, length);
1400 typelist = TREE_CHAIN (typelist);
1404 hidden_typelist = typelist;
1405 for (f = sym->formal; f; f = f->next)
1406 if (f->sym != NULL) /* Ignore alternate returns. */
1407 hidden_typelist = TREE_CHAIN (hidden_typelist);
1409 for (f = sym->formal; f; f = f->next)
1411 char name[GFC_MAX_SYMBOL_LEN + 2];
1413 /* Ignore alternate returns. */
1417 type = TREE_VALUE (typelist);
1419 if (f->sym->ts.type == BT_CHARACTER)
1421 tree len_type = TREE_VALUE (hidden_typelist);
1422 tree length = NULL_TREE;
1423 gcc_assert (len_type == gfc_charlen_type_node);
1425 strcpy (&name[1], f->sym->name);
1427 length = build_decl (PARM_DECL, get_identifier (name), len_type);
1429 hidden_arglist = chainon (hidden_arglist, length);
1430 DECL_CONTEXT (length) = fndecl;
1431 DECL_ARTIFICIAL (length) = 1;
1432 DECL_ARG_TYPE (length) = len_type;
1433 TREE_READONLY (length) = 1;
1434 gfc_finish_decl (length, NULL_TREE);
1436 /* TODO: Check string lengths when -fbounds-check. */
1438 /* Use the passed value for assumed length variables. */
1439 if (!f->sym->ts.cl->length)
1441 TREE_USED (length) = 1;
1442 if (!f->sym->ts.cl->backend_decl)
1443 f->sym->ts.cl->backend_decl = length;
1446 /* there is already another variable using this
1447 gfc_charlen node, build a new one for this variable
1448 and chain it into the list of gfc_charlens.
1449 This happens for e.g. in the case
1451 since CHARACTER declarations on the same line share
1452 the same gfc_charlen node. */
1455 cl = gfc_get_charlen ();
1456 cl->backend_decl = length;
1457 cl->next = f->sym->ts.cl->next;
1458 f->sym->ts.cl->next = cl;
1463 hidden_typelist = TREE_CHAIN (hidden_typelist);
1465 if (f->sym->ts.cl->backend_decl == NULL
1466 || f->sym->ts.cl->backend_decl == length)
1468 if (f->sym->ts.cl->backend_decl == NULL)
1469 gfc_create_string_length (f->sym);
1471 /* Make sure PARM_DECL type doesn't point to incomplete type. */
1472 if (f->sym->attr.flavor == FL_PROCEDURE)
1473 type = build_pointer_type (gfc_get_function_type (f->sym));
1475 type = gfc_sym_type (f->sym);
1479 /* For non-constant length array arguments, make sure they use
1480 a different type node from TYPE_ARG_TYPES type. */
1481 if (f->sym->attr.dimension
1482 && type == TREE_VALUE (typelist)
1483 && TREE_CODE (type) == POINTER_TYPE
1484 && GFC_ARRAY_TYPE_P (type)
1485 && f->sym->as->type != AS_ASSUMED_SIZE
1486 && ! COMPLETE_TYPE_P (TREE_TYPE (type)))
1488 if (f->sym->attr.flavor == FL_PROCEDURE)
1489 type = build_pointer_type (gfc_get_function_type (f->sym));
1491 type = gfc_sym_type (f->sym);
1494 /* Build a the argument declaration. */
1495 parm = build_decl (PARM_DECL, gfc_sym_identifier (f->sym), type);
1497 /* Fill in arg stuff. */
1498 DECL_CONTEXT (parm) = fndecl;
1499 DECL_ARG_TYPE (parm) = TREE_VALUE (typelist);
1500 /* All implementation args are read-only. */
1501 TREE_READONLY (parm) = 1;
1503 gfc_finish_decl (parm, NULL_TREE);
1505 f->sym->backend_decl = parm;
1507 arglist = chainon (arglist, parm);
1508 typelist = TREE_CHAIN (typelist);
1511 /* Add the hidden string length parameters. */
1512 arglist = chainon (arglist, hidden_arglist);
1514 gcc_assert (TREE_VALUE (hidden_typelist) == void_type_node);
1515 DECL_ARGUMENTS (fndecl) = arglist;
1518 /* Convert FNDECL's code to GIMPLE and handle any nested functions. */
1521 gfc_gimplify_function (tree fndecl)
1523 struct cgraph_node *cgn;
1525 gimplify_function_tree (fndecl);
1526 dump_function (TDI_generic, fndecl);
1528 /* Generate errors for structured block violations. */
1529 /* ??? Could be done as part of resolve_labels. */
1531 diagnose_omp_structured_block_errors (fndecl);
1533 /* Convert all nested functions to GIMPLE now. We do things in this order
1534 so that items like VLA sizes are expanded properly in the context of the
1535 correct function. */
1536 cgn = cgraph_node (fndecl);
1537 for (cgn = cgn->nested; cgn; cgn = cgn->next_nested)
1538 gfc_gimplify_function (cgn->decl);
1542 /* Do the setup necessary before generating the body of a function. */
1545 trans_function_start (gfc_symbol * sym)
1549 fndecl = sym->backend_decl;
1551 /* Let GCC know the current scope is this function. */
1552 current_function_decl = fndecl;
1554 /* Let the world know what we're about to do. */
1555 announce_function (fndecl);
1557 if (DECL_CONTEXT (fndecl) == NULL_TREE)
1559 /* Create RTL for function declaration. */
1560 rest_of_decl_compilation (fndecl, 1, 0);
1563 /* Create RTL for function definition. */
1564 make_decl_rtl (fndecl);
1566 init_function_start (fndecl);
1568 /* Even though we're inside a function body, we still don't want to
1569 call expand_expr to calculate the size of a variable-sized array.
1570 We haven't necessarily assigned RTL to all variables yet, so it's
1571 not safe to try to expand expressions involving them. */
1572 cfun->x_dont_save_pending_sizes_p = 1;
1574 /* function.c requires a push at the start of the function. */
1578 /* Create thunks for alternate entry points. */
1581 build_entry_thunks (gfc_namespace * ns)
1583 gfc_formal_arglist *formal;
1584 gfc_formal_arglist *thunk_formal;
1586 gfc_symbol *thunk_sym;
1594 /* This should always be a toplevel function. */
1595 gcc_assert (current_function_decl == NULL_TREE);
1597 gfc_get_backend_locus (&old_loc);
1598 for (el = ns->entries; el; el = el->next)
1600 thunk_sym = el->sym;
1602 build_function_decl (thunk_sym);
1603 create_function_arglist (thunk_sym);
1605 trans_function_start (thunk_sym);
1607 thunk_fndecl = thunk_sym->backend_decl;
1609 gfc_start_block (&body);
1611 /* Pass extra parameter identifying this entry point. */
1612 tmp = build_int_cst (gfc_array_index_type, el->id);
1613 args = tree_cons (NULL_TREE, tmp, NULL_TREE);
1614 string_args = NULL_TREE;
1616 if (thunk_sym->attr.function)
1618 if (gfc_return_by_reference (ns->proc_name))
1620 tree ref = DECL_ARGUMENTS (current_function_decl);
1621 args = tree_cons (NULL_TREE, ref, args);
1622 if (ns->proc_name->ts.type == BT_CHARACTER)
1623 args = tree_cons (NULL_TREE, TREE_CHAIN (ref),
1628 for (formal = ns->proc_name->formal; formal; formal = formal->next)
1630 /* Ignore alternate returns. */
1631 if (formal->sym == NULL)
1634 /* We don't have a clever way of identifying arguments, so resort to
1635 a brute-force search. */
1636 for (thunk_formal = thunk_sym->formal;
1638 thunk_formal = thunk_formal->next)
1640 if (thunk_formal->sym == formal->sym)
1646 /* Pass the argument. */
1647 DECL_ARTIFICIAL (thunk_formal->sym->backend_decl) = 1;
1648 args = tree_cons (NULL_TREE, thunk_formal->sym->backend_decl,
1650 if (formal->sym->ts.type == BT_CHARACTER)
1652 tmp = thunk_formal->sym->ts.cl->backend_decl;
1653 string_args = tree_cons (NULL_TREE, tmp, string_args);
1658 /* Pass NULL for a missing argument. */
1659 args = tree_cons (NULL_TREE, null_pointer_node, args);
1660 if (formal->sym->ts.type == BT_CHARACTER)
1662 tmp = build_int_cst (gfc_charlen_type_node, 0);
1663 string_args = tree_cons (NULL_TREE, tmp, string_args);
1668 /* Call the master function. */
1669 args = nreverse (args);
1670 args = chainon (args, nreverse (string_args));
1671 tmp = ns->proc_name->backend_decl;
1672 tmp = build_function_call_expr (tmp, args);
1673 if (ns->proc_name->attr.mixed_entry_master)
1675 tree union_decl, field;
1676 tree master_type = TREE_TYPE (ns->proc_name->backend_decl);
1678 union_decl = build_decl (VAR_DECL, get_identifier ("__result"),
1679 TREE_TYPE (master_type));
1680 DECL_ARTIFICIAL (union_decl) = 1;
1681 DECL_EXTERNAL (union_decl) = 0;
1682 TREE_PUBLIC (union_decl) = 0;
1683 TREE_USED (union_decl) = 1;
1684 layout_decl (union_decl, 0);
1685 pushdecl (union_decl);
1687 DECL_CONTEXT (union_decl) = current_function_decl;
1688 tmp = build2 (MODIFY_EXPR,
1689 TREE_TYPE (union_decl),
1691 gfc_add_expr_to_block (&body, tmp);
1693 for (field = TYPE_FIELDS (TREE_TYPE (union_decl));
1694 field; field = TREE_CHAIN (field))
1695 if (strcmp (IDENTIFIER_POINTER (DECL_NAME (field)),
1696 thunk_sym->result->name) == 0)
1698 gcc_assert (field != NULL_TREE);
1699 tmp = build3 (COMPONENT_REF, TREE_TYPE (field), union_decl, field,
1701 tmp = build2 (MODIFY_EXPR,
1702 TREE_TYPE (DECL_RESULT (current_function_decl)),
1703 DECL_RESULT (current_function_decl), tmp);
1704 tmp = build1_v (RETURN_EXPR, tmp);
1706 else if (TREE_TYPE (DECL_RESULT (current_function_decl))
1709 tmp = build2 (MODIFY_EXPR,
1710 TREE_TYPE (DECL_RESULT (current_function_decl)),
1711 DECL_RESULT (current_function_decl), tmp);
1712 tmp = build1_v (RETURN_EXPR, tmp);
1714 gfc_add_expr_to_block (&body, tmp);
1716 /* Finish off this function and send it for code generation. */
1717 DECL_SAVED_TREE (thunk_fndecl) = gfc_finish_block (&body);
1719 BLOCK_SUPERCONTEXT (DECL_INITIAL (thunk_fndecl)) = thunk_fndecl;
1721 /* Output the GENERIC tree. */
1722 dump_function (TDI_original, thunk_fndecl);
1724 /* Store the end of the function, so that we get good line number
1725 info for the epilogue. */
1726 cfun->function_end_locus = input_location;
1728 /* We're leaving the context of this function, so zap cfun.
1729 It's still in DECL_STRUCT_FUNCTION, and we'll restore it in
1730 tree_rest_of_compilation. */
1733 current_function_decl = NULL_TREE;
1735 gfc_gimplify_function (thunk_fndecl);
1736 cgraph_finalize_function (thunk_fndecl, false);
1738 /* We share the symbols in the formal argument list with other entry
1739 points and the master function. Clear them so that they are
1740 recreated for each function. */
1741 for (formal = thunk_sym->formal; formal; formal = formal->next)
1742 if (formal->sym != NULL) /* Ignore alternate returns. */
1744 formal->sym->backend_decl = NULL_TREE;
1745 if (formal->sym->ts.type == BT_CHARACTER)
1746 formal->sym->ts.cl->backend_decl = NULL_TREE;
1749 if (thunk_sym->attr.function)
1751 if (thunk_sym->ts.type == BT_CHARACTER)
1752 thunk_sym->ts.cl->backend_decl = NULL_TREE;
1753 if (thunk_sym->result->ts.type == BT_CHARACTER)
1754 thunk_sym->result->ts.cl->backend_decl = NULL_TREE;
1758 gfc_set_backend_locus (&old_loc);
1762 /* Create a decl for a function, and create any thunks for alternate entry
1766 gfc_create_function_decl (gfc_namespace * ns)
1768 /* Create a declaration for the master function. */
1769 build_function_decl (ns->proc_name);
1771 /* Compile the entry thunks. */
1773 build_entry_thunks (ns);
1775 /* Now create the read argument list. */
1776 create_function_arglist (ns->proc_name);
1779 /* Return the decl used to hold the function return value. If
1780 parent_flag is set, the context is the parent_scope*/
1783 gfc_get_fake_result_decl (gfc_symbol * sym, int parent_flag)
1787 tree this_fake_result_decl;
1788 tree this_function_decl;
1790 char name[GFC_MAX_SYMBOL_LEN + 10];
1794 this_fake_result_decl = parent_fake_result_decl;
1795 this_function_decl = DECL_CONTEXT (current_function_decl);
1799 this_fake_result_decl = current_fake_result_decl;
1800 this_function_decl = current_function_decl;
1804 && sym->ns->proc_name->backend_decl == this_function_decl
1805 && sym->ns->proc_name->attr.entry_master
1806 && sym != sym->ns->proc_name)
1809 if (this_fake_result_decl != NULL)
1810 for (t = TREE_CHAIN (this_fake_result_decl); t; t = TREE_CHAIN (t))
1811 if (strcmp (IDENTIFIER_POINTER (TREE_PURPOSE (t)), sym->name) == 0)
1814 return TREE_VALUE (t);
1815 decl = gfc_get_fake_result_decl (sym->ns->proc_name, parent_flag);
1818 this_fake_result_decl = parent_fake_result_decl;
1820 this_fake_result_decl = current_fake_result_decl;
1822 if (decl && sym->ns->proc_name->attr.mixed_entry_master)
1826 for (field = TYPE_FIELDS (TREE_TYPE (decl));
1827 field; field = TREE_CHAIN (field))
1828 if (strcmp (IDENTIFIER_POINTER (DECL_NAME (field)),
1832 gcc_assert (field != NULL_TREE);
1833 decl = build3 (COMPONENT_REF, TREE_TYPE (field), decl, field,
1837 var = create_tmp_var_raw (TREE_TYPE (decl), sym->name);
1839 gfc_add_decl_to_parent_function (var);
1841 gfc_add_decl_to_function (var);
1843 SET_DECL_VALUE_EXPR (var, decl);
1844 DECL_HAS_VALUE_EXPR_P (var) = 1;
1845 GFC_DECL_RESULT (var) = 1;
1847 TREE_CHAIN (this_fake_result_decl)
1848 = tree_cons (get_identifier (sym->name), var,
1849 TREE_CHAIN (this_fake_result_decl));
1853 if (this_fake_result_decl != NULL_TREE)
1854 return TREE_VALUE (this_fake_result_decl);
1856 /* Only when gfc_get_fake_result_decl is called by gfc_trans_return,
1861 if (sym->ts.type == BT_CHARACTER)
1863 if (sym->ts.cl->backend_decl == NULL_TREE)
1864 length = gfc_create_string_length (sym);
1866 length = sym->ts.cl->backend_decl;
1867 if (TREE_CODE (length) == VAR_DECL
1868 && DECL_CONTEXT (length) == NULL_TREE)
1869 gfc_add_decl_to_function (length);
1872 if (gfc_return_by_reference (sym))
1874 decl = DECL_ARGUMENTS (this_function_decl);
1876 if (sym->ns->proc_name->backend_decl == this_function_decl
1877 && sym->ns->proc_name->attr.entry_master)
1878 decl = TREE_CHAIN (decl);
1880 TREE_USED (decl) = 1;
1882 decl = gfc_build_dummy_array_decl (sym, decl);
1886 sprintf (name, "__result_%.20s",
1887 IDENTIFIER_POINTER (DECL_NAME (this_function_decl)));
1889 decl = build_decl (VAR_DECL, get_identifier (name),
1890 TREE_TYPE (TREE_TYPE (this_function_decl)));
1892 DECL_ARTIFICIAL (decl) = 1;
1893 DECL_EXTERNAL (decl) = 0;
1894 TREE_PUBLIC (decl) = 0;
1895 TREE_USED (decl) = 1;
1896 GFC_DECL_RESULT (decl) = 1;
1897 TREE_ADDRESSABLE (decl) = 1;
1899 layout_decl (decl, 0);
1902 gfc_add_decl_to_parent_function (decl);
1904 gfc_add_decl_to_function (decl);
1908 parent_fake_result_decl = build_tree_list (NULL, decl);
1910 current_fake_result_decl = build_tree_list (NULL, decl);
1916 /* Builds a function decl. The remaining parameters are the types of the
1917 function arguments. Negative nargs indicates a varargs function. */
1920 gfc_build_library_function_decl (tree name, tree rettype, int nargs, ...)
1929 /* Library functions must be declared with global scope. */
1930 gcc_assert (current_function_decl == NULL_TREE);
1932 va_start (p, nargs);
1935 /* Create a list of the argument types. */
1936 for (arglist = NULL_TREE, n = abs (nargs); n > 0; n--)
1938 argtype = va_arg (p, tree);
1939 arglist = gfc_chainon_list (arglist, argtype);
1944 /* Terminate the list. */
1945 arglist = gfc_chainon_list (arglist, void_type_node);
1948 /* Build the function type and decl. */
1949 fntype = build_function_type (rettype, arglist);
1950 fndecl = build_decl (FUNCTION_DECL, name, fntype);
1952 /* Mark this decl as external. */
1953 DECL_EXTERNAL (fndecl) = 1;
1954 TREE_PUBLIC (fndecl) = 1;
1960 rest_of_decl_compilation (fndecl, 1, 0);
1966 gfc_build_intrinsic_function_decls (void)
1968 tree gfc_int4_type_node = gfc_get_int_type (4);
1969 tree gfc_int8_type_node = gfc_get_int_type (8);
1970 tree gfc_int16_type_node = gfc_get_int_type (16);
1971 tree gfc_logical4_type_node = gfc_get_logical_type (4);
1972 tree gfc_real4_type_node = gfc_get_real_type (4);
1973 tree gfc_real8_type_node = gfc_get_real_type (8);
1974 tree gfc_real10_type_node = gfc_get_real_type (10);
1975 tree gfc_real16_type_node = gfc_get_real_type (16);
1976 tree gfc_complex4_type_node = gfc_get_complex_type (4);
1977 tree gfc_complex8_type_node = gfc_get_complex_type (8);
1978 tree gfc_complex10_type_node = gfc_get_complex_type (10);
1979 tree gfc_complex16_type_node = gfc_get_complex_type (16);
1980 tree gfc_c_int_type_node = gfc_get_int_type (gfc_c_int_kind);
1982 /* String functions. */
1983 gfor_fndecl_compare_string =
1984 gfc_build_library_function_decl (get_identifier (PREFIX("compare_string")),
1987 gfc_charlen_type_node, pchar_type_node,
1988 gfc_charlen_type_node, pchar_type_node);
1990 gfor_fndecl_concat_string =
1991 gfc_build_library_function_decl (get_identifier (PREFIX("concat_string")),
1994 gfc_charlen_type_node, pchar_type_node,
1995 gfc_charlen_type_node, pchar_type_node,
1996 gfc_charlen_type_node, pchar_type_node);
1998 gfor_fndecl_string_len_trim =
1999 gfc_build_library_function_decl (get_identifier (PREFIX("string_len_trim")),
2001 2, gfc_charlen_type_node,
2004 gfor_fndecl_string_index =
2005 gfc_build_library_function_decl (get_identifier (PREFIX("string_index")),
2007 5, gfc_charlen_type_node, pchar_type_node,
2008 gfc_charlen_type_node, pchar_type_node,
2009 gfc_logical4_type_node);
2011 gfor_fndecl_string_scan =
2012 gfc_build_library_function_decl (get_identifier (PREFIX("string_scan")),
2014 5, gfc_charlen_type_node, pchar_type_node,
2015 gfc_charlen_type_node, pchar_type_node,
2016 gfc_logical4_type_node);
2018 gfor_fndecl_string_verify =
2019 gfc_build_library_function_decl (get_identifier (PREFIX("string_verify")),
2021 5, gfc_charlen_type_node, pchar_type_node,
2022 gfc_charlen_type_node, pchar_type_node,
2023 gfc_logical4_type_node);
2025 gfor_fndecl_string_trim =
2026 gfc_build_library_function_decl (get_identifier (PREFIX("string_trim")),
2029 build_pointer_type (gfc_charlen_type_node),
2031 gfc_charlen_type_node,
2034 gfor_fndecl_string_repeat =
2035 gfc_build_library_function_decl (get_identifier (PREFIX("string_repeat")),
2039 gfc_charlen_type_node,
2041 gfc_int4_type_node);
2043 gfor_fndecl_ttynam =
2044 gfc_build_library_function_decl (get_identifier (PREFIX("ttynam")),
2048 gfc_charlen_type_node,
2049 gfc_c_int_type_node);
2052 gfc_build_library_function_decl (get_identifier (PREFIX("fdate")),
2056 gfc_charlen_type_node);
2059 gfc_build_library_function_decl (get_identifier (PREFIX("ctime")),
2063 gfc_charlen_type_node,
2064 gfc_int8_type_node);
2066 gfor_fndecl_adjustl =
2067 gfc_build_library_function_decl (get_identifier (PREFIX("adjustl")),
2071 gfc_charlen_type_node, pchar_type_node);
2073 gfor_fndecl_adjustr =
2074 gfc_build_library_function_decl (get_identifier (PREFIX("adjustr")),
2078 gfc_charlen_type_node, pchar_type_node);
2080 gfor_fndecl_si_kind =
2081 gfc_build_library_function_decl (get_identifier ("selected_int_kind"),
2086 gfor_fndecl_sr_kind =
2087 gfc_build_library_function_decl (get_identifier ("selected_real_kind"),
2092 /* Power functions. */
2094 tree ctype, rtype, itype, jtype;
2095 int rkind, ikind, jkind;
2098 static int ikinds[NIKINDS] = {4, 8, 16};
2099 static int rkinds[NRKINDS] = {4, 8, 10, 16};
2100 char name[PREFIX_LEN + 12]; /* _gfortran_pow_?n_?n */
2102 for (ikind=0; ikind < NIKINDS; ikind++)
2104 itype = gfc_get_int_type (ikinds[ikind]);
2106 for (jkind=0; jkind < NIKINDS; jkind++)
2108 jtype = gfc_get_int_type (ikinds[jkind]);
2111 sprintf(name, PREFIX("pow_i%d_i%d"), ikinds[ikind],
2113 gfor_fndecl_math_powi[jkind][ikind].integer =
2114 gfc_build_library_function_decl (get_identifier (name),
2115 jtype, 2, jtype, itype);
2116 TREE_READONLY (gfor_fndecl_math_powi[jkind][ikind].integer) = 1;
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);
2130 TREE_READONLY (gfor_fndecl_math_powi[rkind][ikind].real) = 1;
2133 ctype = gfc_get_complex_type (rkinds[rkind]);
2136 sprintf(name, PREFIX("pow_c%d_i%d"), rkinds[rkind],
2138 gfor_fndecl_math_powi[rkind][ikind].cmplx =
2139 gfc_build_library_function_decl (get_identifier (name),
2140 ctype, 2,ctype, itype);
2141 TREE_READONLY (gfor_fndecl_math_powi[rkind][ikind].cmplx) = 1;
2149 gfor_fndecl_math_cpowf =
2150 gfc_build_library_function_decl (get_identifier ("cpowf"),
2151 gfc_complex4_type_node,
2152 1, gfc_complex4_type_node);
2153 gfor_fndecl_math_cpow =
2154 gfc_build_library_function_decl (get_identifier ("cpow"),
2155 gfc_complex8_type_node,
2156 1, gfc_complex8_type_node);
2157 if (gfc_complex10_type_node)
2158 gfor_fndecl_math_cpowl10 =
2159 gfc_build_library_function_decl (get_identifier ("cpowl"),
2160 gfc_complex10_type_node, 1,
2161 gfc_complex10_type_node);
2162 if (gfc_complex16_type_node)
2163 gfor_fndecl_math_cpowl16 =
2164 gfc_build_library_function_decl (get_identifier ("cpowl"),
2165 gfc_complex16_type_node, 1,
2166 gfc_complex16_type_node);
2168 gfor_fndecl_math_ishftc4 =
2169 gfc_build_library_function_decl (get_identifier (PREFIX("ishftc4")),
2171 3, gfc_int4_type_node,
2172 gfc_int4_type_node, gfc_int4_type_node);
2173 gfor_fndecl_math_ishftc8 =
2174 gfc_build_library_function_decl (get_identifier (PREFIX("ishftc8")),
2176 3, gfc_int8_type_node,
2177 gfc_int4_type_node, gfc_int4_type_node);
2178 if (gfc_int16_type_node)
2179 gfor_fndecl_math_ishftc16 =
2180 gfc_build_library_function_decl (get_identifier (PREFIX("ishftc16")),
2181 gfc_int16_type_node, 3,
2182 gfc_int16_type_node,
2184 gfc_int4_type_node);
2186 gfor_fndecl_math_exponent4 =
2187 gfc_build_library_function_decl (get_identifier (PREFIX("exponent_r4")),
2189 1, gfc_real4_type_node);
2190 gfor_fndecl_math_exponent8 =
2191 gfc_build_library_function_decl (get_identifier (PREFIX("exponent_r8")),
2193 1, gfc_real8_type_node);
2194 if (gfc_real10_type_node)
2195 gfor_fndecl_math_exponent10 =
2196 gfc_build_library_function_decl (get_identifier (PREFIX("exponent_r10")),
2197 gfc_int4_type_node, 1,
2198 gfc_real10_type_node);
2199 if (gfc_real16_type_node)
2200 gfor_fndecl_math_exponent16 =
2201 gfc_build_library_function_decl (get_identifier (PREFIX("exponent_r16")),
2202 gfc_int4_type_node, 1,
2203 gfc_real16_type_node);
2205 /* BLAS functions. */
2207 tree pint = build_pointer_type (gfc_c_int_type_node);
2208 tree ps = build_pointer_type (gfc_get_real_type (gfc_default_real_kind));
2209 tree pd = build_pointer_type (gfc_get_real_type (gfc_default_double_kind));
2210 tree pc = build_pointer_type (gfc_get_complex_type (gfc_default_real_kind));
2211 tree pz = build_pointer_type
2212 (gfc_get_complex_type (gfc_default_double_kind));
2214 gfor_fndecl_sgemm = gfc_build_library_function_decl
2216 (gfc_option.flag_underscoring ? "sgemm_"
2218 void_type_node, 15, pchar_type_node,
2219 pchar_type_node, pint, pint, pint, ps, ps, pint,
2220 ps, pint, ps, ps, pint, gfc_c_int_type_node,
2221 gfc_c_int_type_node);
2222 gfor_fndecl_dgemm = gfc_build_library_function_decl
2224 (gfc_option.flag_underscoring ? "dgemm_"
2226 void_type_node, 15, pchar_type_node,
2227 pchar_type_node, pint, pint, pint, pd, pd, pint,
2228 pd, pint, pd, pd, pint, gfc_c_int_type_node,
2229 gfc_c_int_type_node);
2230 gfor_fndecl_cgemm = gfc_build_library_function_decl
2232 (gfc_option.flag_underscoring ? "cgemm_"
2234 void_type_node, 15, pchar_type_node,
2235 pchar_type_node, pint, pint, pint, pc, pc, pint,
2236 pc, pint, pc, pc, pint, gfc_c_int_type_node,
2237 gfc_c_int_type_node);
2238 gfor_fndecl_zgemm = gfc_build_library_function_decl
2240 (gfc_option.flag_underscoring ? "zgemm_"
2242 void_type_node, 15, pchar_type_node,
2243 pchar_type_node, pint, pint, pint, pz, pz, pint,
2244 pz, pint, pz, pz, pint, gfc_c_int_type_node,
2245 gfc_c_int_type_node);
2248 /* Other functions. */
2250 gfc_build_library_function_decl (get_identifier (PREFIX("size0")),
2251 gfc_array_index_type,
2252 1, pvoid_type_node);
2254 gfc_build_library_function_decl (get_identifier (PREFIX("size1")),
2255 gfc_array_index_type,
2257 gfc_array_index_type);
2260 gfc_build_library_function_decl (get_identifier (PREFIX ("iargc")),
2266 /* Make prototypes for runtime library functions. */
2269 gfc_build_builtin_function_decls (void)
2271 tree gfc_c_int_type_node = gfc_get_int_type (gfc_c_int_kind);
2272 tree gfc_int4_type_node = gfc_get_int_type (4);
2273 tree gfc_int8_type_node = gfc_get_int_type (8);
2274 tree gfc_logical4_type_node = gfc_get_logical_type (4);
2275 tree gfc_pint4_type_node = build_pointer_type (gfc_int4_type_node);
2277 /* Treat these two internal malloc wrappers as malloc. */
2278 gfor_fndecl_internal_malloc =
2279 gfc_build_library_function_decl (get_identifier (PREFIX("internal_malloc")),
2280 pvoid_type_node, 1, gfc_int4_type_node);
2281 DECL_IS_MALLOC (gfor_fndecl_internal_malloc) = 1;
2283 gfor_fndecl_internal_malloc64 =
2284 gfc_build_library_function_decl (get_identifier
2285 (PREFIX("internal_malloc64")),
2286 pvoid_type_node, 1, gfc_int8_type_node);
2287 DECL_IS_MALLOC (gfor_fndecl_internal_malloc64) = 1;
2289 gfor_fndecl_internal_realloc =
2290 gfc_build_library_function_decl (get_identifier
2291 (PREFIX("internal_realloc")),
2292 pvoid_type_node, 2, pvoid_type_node,
2293 gfc_int4_type_node);
2295 gfor_fndecl_internal_realloc64 =
2296 gfc_build_library_function_decl (get_identifier
2297 (PREFIX("internal_realloc64")),
2298 pvoid_type_node, 2, pvoid_type_node,
2299 gfc_int8_type_node);
2301 gfor_fndecl_internal_free =
2302 gfc_build_library_function_decl (get_identifier (PREFIX("internal_free")),
2303 void_type_node, 1, pvoid_type_node);
2305 gfor_fndecl_allocate =
2306 gfc_build_library_function_decl (get_identifier (PREFIX("allocate")),
2308 gfc_int4_type_node, gfc_pint4_type_node);
2309 DECL_IS_MALLOC (gfor_fndecl_allocate) = 1;
2311 gfor_fndecl_allocate64 =
2312 gfc_build_library_function_decl (get_identifier (PREFIX("allocate64")),
2314 gfc_int8_type_node, gfc_pint4_type_node);
2315 DECL_IS_MALLOC (gfor_fndecl_allocate64) = 1;
2317 gfor_fndecl_allocate_array =
2318 gfc_build_library_function_decl (get_identifier (PREFIX("allocate_array")),
2319 pvoid_type_node, 3, pvoid_type_node,
2320 gfc_int4_type_node, gfc_pint4_type_node);
2321 DECL_IS_MALLOC (gfor_fndecl_allocate_array) = 1;
2323 gfor_fndecl_allocate64_array =
2324 gfc_build_library_function_decl (get_identifier (PREFIX("allocate64_array")),
2325 pvoid_type_node, 3, pvoid_type_node,
2326 gfc_int8_type_node, gfc_pint4_type_node);
2327 DECL_IS_MALLOC (gfor_fndecl_allocate64_array) = 1;
2329 gfor_fndecl_deallocate =
2330 gfc_build_library_function_decl (get_identifier (PREFIX("deallocate")),
2331 void_type_node, 2, pvoid_type_node,
2332 gfc_pint4_type_node);
2334 gfor_fndecl_stop_numeric =
2335 gfc_build_library_function_decl (get_identifier (PREFIX("stop_numeric")),
2336 void_type_node, 1, gfc_int4_type_node);
2338 /* Stop doesn't return. */
2339 TREE_THIS_VOLATILE (gfor_fndecl_stop_numeric) = 1;
2341 gfor_fndecl_stop_string =
2342 gfc_build_library_function_decl (get_identifier (PREFIX("stop_string")),
2343 void_type_node, 2, pchar_type_node,
2344 gfc_int4_type_node);
2345 /* Stop doesn't return. */
2346 TREE_THIS_VOLATILE (gfor_fndecl_stop_string) = 1;
2348 gfor_fndecl_pause_numeric =
2349 gfc_build_library_function_decl (get_identifier (PREFIX("pause_numeric")),
2350 void_type_node, 1, gfc_int4_type_node);
2352 gfor_fndecl_pause_string =
2353 gfc_build_library_function_decl (get_identifier (PREFIX("pause_string")),
2354 void_type_node, 2, pchar_type_node,
2355 gfc_int4_type_node);
2357 gfor_fndecl_select_string =
2358 gfc_build_library_function_decl (get_identifier (PREFIX("select_string")),
2359 pvoid_type_node, 0);
2361 gfor_fndecl_runtime_error =
2362 gfc_build_library_function_decl (get_identifier (PREFIX("runtime_error")),
2363 void_type_node, 1, pchar_type_node);
2364 /* The runtime_error function does not return. */
2365 TREE_THIS_VOLATILE (gfor_fndecl_runtime_error) = 1;
2367 gfor_fndecl_set_fpe =
2368 gfc_build_library_function_decl (get_identifier (PREFIX("set_fpe")),
2369 void_type_node, 1, gfc_c_int_type_node);
2371 gfor_fndecl_set_std =
2372 gfc_build_library_function_decl (get_identifier (PREFIX("set_std")),
2377 gfc_int4_type_node);
2379 gfor_fndecl_set_convert =
2380 gfc_build_library_function_decl (get_identifier (PREFIX("set_convert")),
2381 void_type_node, 1, gfc_c_int_type_node);
2383 gfor_fndecl_set_record_marker =
2384 gfc_build_library_function_decl (get_identifier (PREFIX("set_record_marker")),
2385 void_type_node, 1, gfc_c_int_type_node);
2387 gfor_fndecl_set_max_subrecord_length =
2388 gfc_build_library_function_decl (get_identifier (PREFIX("set_max_subrecord_length")),
2389 void_type_node, 1, gfc_c_int_type_node);
2391 gfor_fndecl_in_pack = gfc_build_library_function_decl (
2392 get_identifier (PREFIX("internal_pack")),
2393 pvoid_type_node, 1, pvoid_type_node);
2395 gfor_fndecl_in_unpack = gfc_build_library_function_decl (
2396 get_identifier (PREFIX("internal_unpack")),
2397 pvoid_type_node, 1, pvoid_type_node);
2399 gfor_fndecl_associated =
2400 gfc_build_library_function_decl (
2401 get_identifier (PREFIX("associated")),
2402 gfc_logical4_type_node,
2407 gfc_build_intrinsic_function_decls ();
2408 gfc_build_intrinsic_lib_fndecls ();
2409 gfc_build_io_library_fndecls ();
2413 /* Evaluate the length of dummy character variables. */
2416 gfc_trans_dummy_character (gfc_symbol *sym, gfc_charlen *cl, tree fnbody)
2420 gfc_finish_decl (cl->backend_decl, NULL_TREE);
2422 gfc_start_block (&body);
2424 /* Evaluate the string length expression. */
2425 gfc_trans_init_string_length (cl, &body);
2427 gfc_trans_vla_type_sizes (sym, &body);
2429 gfc_add_expr_to_block (&body, fnbody);
2430 return gfc_finish_block (&body);
2434 /* Allocate and cleanup an automatic character variable. */
2437 gfc_trans_auto_character_variable (gfc_symbol * sym, tree fnbody)
2443 gcc_assert (sym->backend_decl);
2444 gcc_assert (sym->ts.cl && sym->ts.cl->length);
2446 gfc_start_block (&body);
2448 /* Evaluate the string length expression. */
2449 gfc_trans_init_string_length (sym->ts.cl, &body);
2451 gfc_trans_vla_type_sizes (sym, &body);
2453 decl = sym->backend_decl;
2455 /* Emit a DECL_EXPR for this variable, which will cause the
2456 gimplifier to allocate storage, and all that good stuff. */
2457 tmp = build1 (DECL_EXPR, TREE_TYPE (decl), decl);
2458 gfc_add_expr_to_block (&body, tmp);
2460 gfc_add_expr_to_block (&body, fnbody);
2461 return gfc_finish_block (&body);
2464 /* Set the initial value of ASSIGN statement auxiliary variable explicitly. */
2467 gfc_trans_assign_aux_var (gfc_symbol * sym, tree fnbody)
2471 gcc_assert (sym->backend_decl);
2472 gfc_start_block (&body);
2474 /* Set the initial value to length. See the comments in
2475 function gfc_add_assign_aux_vars in this file. */
2476 gfc_add_modify_expr (&body, GFC_DECL_STRING_LEN (sym->backend_decl),
2477 build_int_cst (NULL_TREE, -2));
2479 gfc_add_expr_to_block (&body, fnbody);
2480 return gfc_finish_block (&body);
2484 gfc_trans_vla_one_sizepos (tree *tp, stmtblock_t *body)
2486 tree t = *tp, var, val;
2488 if (t == NULL || t == error_mark_node)
2490 if (TREE_CONSTANT (t) || DECL_P (t))
2493 if (TREE_CODE (t) == SAVE_EXPR)
2495 if (SAVE_EXPR_RESOLVED_P (t))
2497 *tp = TREE_OPERAND (t, 0);
2500 val = TREE_OPERAND (t, 0);
2505 var = gfc_create_var_np (TREE_TYPE (t), NULL);
2506 gfc_add_decl_to_function (var);
2507 gfc_add_modify_expr (body, var, val);
2508 if (TREE_CODE (t) == SAVE_EXPR)
2509 TREE_OPERAND (t, 0) = var;
2514 gfc_trans_vla_type_sizes_1 (tree type, stmtblock_t *body)
2518 if (type == NULL || type == error_mark_node)
2521 type = TYPE_MAIN_VARIANT (type);
2523 if (TREE_CODE (type) == INTEGER_TYPE)
2525 gfc_trans_vla_one_sizepos (&TYPE_MIN_VALUE (type), body);
2526 gfc_trans_vla_one_sizepos (&TYPE_MAX_VALUE (type), body);
2528 for (t = TYPE_NEXT_VARIANT (type); t; t = TYPE_NEXT_VARIANT (t))
2530 TYPE_MIN_VALUE (t) = TYPE_MIN_VALUE (type);
2531 TYPE_MAX_VALUE (t) = TYPE_MAX_VALUE (type);
2534 else if (TREE_CODE (type) == ARRAY_TYPE)
2536 gfc_trans_vla_type_sizes_1 (TREE_TYPE (type), body);
2537 gfc_trans_vla_type_sizes_1 (TYPE_DOMAIN (type), body);
2538 gfc_trans_vla_one_sizepos (&TYPE_SIZE (type), body);
2539 gfc_trans_vla_one_sizepos (&TYPE_SIZE_UNIT (type), body);
2541 for (t = TYPE_NEXT_VARIANT (type); t; t = TYPE_NEXT_VARIANT (t))
2543 TYPE_SIZE (t) = TYPE_SIZE (type);
2544 TYPE_SIZE_UNIT (t) = TYPE_SIZE_UNIT (type);
2549 /* Make sure all type sizes and array domains are either constant,
2550 or variable or parameter decls. This is a simplified variant
2551 of gimplify_type_sizes, but we can't use it here, as none of the
2552 variables in the expressions have been gimplified yet.
2553 As type sizes and domains for various variable length arrays
2554 contain VAR_DECLs that are only initialized at gfc_trans_deferred_vars
2555 time, without this routine gimplify_type_sizes in the middle-end
2556 could result in the type sizes being gimplified earlier than where
2557 those variables are initialized. */
2560 gfc_trans_vla_type_sizes (gfc_symbol *sym, stmtblock_t *body)
2562 tree type = TREE_TYPE (sym->backend_decl);
2564 if (TREE_CODE (type) == FUNCTION_TYPE
2565 && (sym->attr.function || sym->attr.result || sym->attr.entry))
2567 if (! current_fake_result_decl)
2570 type = TREE_TYPE (TREE_VALUE (current_fake_result_decl));
2573 while (POINTER_TYPE_P (type))
2574 type = TREE_TYPE (type);
2576 if (GFC_DESCRIPTOR_TYPE_P (type))
2578 tree etype = GFC_TYPE_ARRAY_DATAPTR_TYPE (type);
2580 while (POINTER_TYPE_P (etype))
2581 etype = TREE_TYPE (etype);
2583 gfc_trans_vla_type_sizes_1 (etype, body);
2586 gfc_trans_vla_type_sizes_1 (type, body);
2590 /* Generate function entry and exit code, and add it to the function body.
2592 Allocation and initialization of array variables.
2593 Allocation of character string variables.
2594 Initialization and possibly repacking of dummy arrays.
2595 Initialization of ASSIGN statement auxiliary variable. */
2598 gfc_trans_deferred_vars (gfc_symbol * proc_sym, tree fnbody)
2602 gfc_formal_arglist *f;
2604 bool seen_trans_deferred_array = false;
2606 /* Deal with implicit return variables. Explicit return variables will
2607 already have been added. */
2608 if (gfc_return_by_reference (proc_sym) && proc_sym->result == proc_sym)
2610 if (!current_fake_result_decl)
2612 gfc_entry_list *el = NULL;
2613 if (proc_sym->attr.entry_master)
2615 for (el = proc_sym->ns->entries; el; el = el->next)
2616 if (el->sym != el->sym->result)
2620 warning (0, "Function does not return a value");
2622 else if (proc_sym->as)
2624 tree result = TREE_VALUE (current_fake_result_decl);
2625 fnbody = gfc_trans_dummy_array_bias (proc_sym, result, fnbody);
2627 /* An automatic character length, pointer array result. */
2628 if (proc_sym->ts.type == BT_CHARACTER
2629 && TREE_CODE (proc_sym->ts.cl->backend_decl) == VAR_DECL)
2630 fnbody = gfc_trans_dummy_character (proc_sym, proc_sym->ts.cl,
2633 else if (proc_sym->ts.type == BT_CHARACTER)
2635 if (TREE_CODE (proc_sym->ts.cl->backend_decl) == VAR_DECL)
2636 fnbody = gfc_trans_dummy_character (proc_sym, proc_sym->ts.cl,
2640 gcc_assert (gfc_option.flag_f2c
2641 && proc_sym->ts.type == BT_COMPLEX);
2644 for (sym = proc_sym->tlink; sym != proc_sym; sym = sym->tlink)
2646 bool sym_has_alloc_comp = (sym->ts.type == BT_DERIVED)
2647 && sym->ts.derived->attr.alloc_comp;
2648 if (sym->attr.dimension)
2650 switch (sym->as->type)
2653 if (sym->attr.dummy || sym->attr.result)
2655 gfc_trans_dummy_array_bias (sym, sym->backend_decl, fnbody);
2656 else if (sym->attr.pointer || sym->attr.allocatable)
2658 if (TREE_STATIC (sym->backend_decl))
2659 gfc_trans_static_array_pointer (sym);
2662 seen_trans_deferred_array = true;
2663 fnbody = gfc_trans_deferred_array (sym, fnbody);
2668 if (sym_has_alloc_comp)
2670 seen_trans_deferred_array = true;
2671 fnbody = gfc_trans_deferred_array (sym, fnbody);
2674 gfc_get_backend_locus (&loc);
2675 gfc_set_backend_locus (&sym->declared_at);
2676 fnbody = gfc_trans_auto_array_allocation (sym->backend_decl,
2678 gfc_set_backend_locus (&loc);
2682 case AS_ASSUMED_SIZE:
2683 /* Must be a dummy parameter. */
2684 gcc_assert (sym->attr.dummy);
2686 /* We should always pass assumed size arrays the g77 way. */
2687 fnbody = gfc_trans_g77_array (sym, fnbody);
2690 case AS_ASSUMED_SHAPE:
2691 /* Must be a dummy parameter. */
2692 gcc_assert (sym->attr.dummy);
2694 fnbody = gfc_trans_dummy_array_bias (sym, sym->backend_decl,
2699 seen_trans_deferred_array = true;
2700 fnbody = gfc_trans_deferred_array (sym, fnbody);
2706 if (sym_has_alloc_comp && !seen_trans_deferred_array)
2707 fnbody = gfc_trans_deferred_array (sym, fnbody);
2709 else if (sym_has_alloc_comp)
2710 fnbody = gfc_trans_deferred_array (sym, fnbody);
2711 else if (sym->ts.type == BT_CHARACTER)
2713 gfc_get_backend_locus (&loc);
2714 gfc_set_backend_locus (&sym->declared_at);
2715 if (sym->attr.dummy || sym->attr.result)
2716 fnbody = gfc_trans_dummy_character (sym, sym->ts.cl, fnbody);
2718 fnbody = gfc_trans_auto_character_variable (sym, fnbody);
2719 gfc_set_backend_locus (&loc);
2721 else if (sym->attr.assign)
2723 gfc_get_backend_locus (&loc);
2724 gfc_set_backend_locus (&sym->declared_at);
2725 fnbody = gfc_trans_assign_aux_var (sym, fnbody);
2726 gfc_set_backend_locus (&loc);
2732 gfc_init_block (&body);
2734 for (f = proc_sym->formal; f; f = f->next)
2735 if (f->sym && f->sym->tlink == NULL && f->sym->ts.type == BT_CHARACTER)
2737 gcc_assert (f->sym->ts.cl->backend_decl != NULL);
2738 if (TREE_CODE (f->sym->ts.cl->backend_decl) == PARM_DECL)
2739 gfc_trans_vla_type_sizes (f->sym, &body);
2742 if (gfc_return_by_reference (proc_sym) && proc_sym->ts.type == BT_CHARACTER
2743 && current_fake_result_decl != NULL)
2745 gcc_assert (proc_sym->ts.cl->backend_decl != NULL);
2746 if (TREE_CODE (proc_sym->ts.cl->backend_decl) == PARM_DECL)
2747 gfc_trans_vla_type_sizes (proc_sym, &body);
2750 gfc_add_expr_to_block (&body, fnbody);
2751 return gfc_finish_block (&body);
2755 /* Output an initialized decl for a module variable. */
2758 gfc_create_module_variable (gfc_symbol * sym)
2762 /* Module functions with alternate entries are dealt with later and
2763 would get caught by the next condition. */
2764 if (sym->attr.entry)
2767 /* Only output variables and array valued parameters. */
2768 if (sym->attr.flavor != FL_VARIABLE
2769 && (sym->attr.flavor != FL_PARAMETER || sym->attr.dimension == 0))
2772 /* Don't generate variables from other modules. Variables from
2773 COMMONs will already have been generated. */
2774 if (sym->attr.use_assoc || sym->attr.in_common)
2777 /* Equivalenced variables arrive here after creation. */
2778 if (sym->backend_decl
2779 && (sym->equiv_built || sym->attr.in_equivalence))
2782 if (sym->backend_decl)
2783 internal_error ("backend decl for module variable %s already exists",
2786 /* We always want module variables to be created. */
2787 sym->attr.referenced = 1;
2788 /* Create the decl. */
2789 decl = gfc_get_symbol_decl (sym);
2791 /* Create the variable. */
2793 rest_of_decl_compilation (decl, 1, 0);
2795 /* Also add length of strings. */
2796 if (sym->ts.type == BT_CHARACTER)
2800 length = sym->ts.cl->backend_decl;
2801 if (!INTEGER_CST_P (length))
2804 rest_of_decl_compilation (length, 1, 0);
2810 /* Generate all the required code for module variables. */
2813 gfc_generate_module_vars (gfc_namespace * ns)
2815 module_namespace = ns;
2817 /* Check if the frontend left the namespace in a reasonable state. */
2818 gcc_assert (ns->proc_name && !ns->proc_name->tlink);
2820 /* Generate COMMON blocks. */
2821 gfc_trans_common (ns);
2823 /* Create decls for all the module variables. */
2824 gfc_traverse_ns (ns, gfc_create_module_variable);
2828 gfc_generate_contained_functions (gfc_namespace * parent)
2832 /* We create all the prototypes before generating any code. */
2833 for (ns = parent->contained; ns; ns = ns->sibling)
2835 /* Skip namespaces from used modules. */
2836 if (ns->parent != parent)
2839 gfc_create_function_decl (ns);
2842 for (ns = parent->contained; ns; ns = ns->sibling)
2844 /* Skip namespaces from used modules. */
2845 if (ns->parent != parent)
2848 gfc_generate_function_code (ns);
2853 /* Drill down through expressions for the array specification bounds and
2854 character length calling generate_local_decl for all those variables
2855 that have not already been declared. */
2858 generate_local_decl (gfc_symbol *);
2861 generate_expr_decls (gfc_symbol *sym, gfc_expr *e)
2863 gfc_actual_arglist *arg;
2870 switch (e->expr_type)
2873 for (arg = e->value.function.actual; arg; arg = arg->next)
2874 generate_expr_decls (sym, arg->expr);
2877 /* If the variable is not the same as the dependent, 'sym', and
2878 it is not marked as being declared and it is in the same
2879 namespace as 'sym', add it to the local declarations. */
2881 if (sym == e->symtree->n.sym
2882 || e->symtree->n.sym->mark
2883 || e->symtree->n.sym->ns != sym->ns)
2886 generate_local_decl (e->symtree->n.sym);
2890 generate_expr_decls (sym, e->value.op.op1);
2891 generate_expr_decls (sym, e->value.op.op2);
2900 for (ref = e->ref; ref; ref = ref->next)
2905 for (i = 0; i < ref->u.ar.dimen; i++)
2907 generate_expr_decls (sym, ref->u.ar.start[i]);
2908 generate_expr_decls (sym, ref->u.ar.end[i]);
2909 generate_expr_decls (sym, ref->u.ar.stride[i]);
2914 generate_expr_decls (sym, ref->u.ss.start);
2915 generate_expr_decls (sym, ref->u.ss.end);
2919 if (ref->u.c.component->ts.type == BT_CHARACTER
2920 && ref->u.c.component->ts.cl->length->expr_type
2922 generate_expr_decls (sym, ref->u.c.component->ts.cl->length);
2924 if (ref->u.c.component->as)
2925 for (i = 0; i < ref->u.c.component->as->rank; i++)
2927 generate_expr_decls (sym, ref->u.c.component->as->lower[i]);
2928 generate_expr_decls (sym, ref->u.c.component->as->upper[i]);
2937 /* Check for dependencies in the character length and array spec. */
2940 generate_dependency_declarations (gfc_symbol *sym)
2944 if (sym->ts.type == BT_CHARACTER
2945 && sym->ts.cl->length->expr_type != EXPR_CONSTANT)
2946 generate_expr_decls (sym, sym->ts.cl->length);
2948 if (sym->as && sym->as->rank)
2950 for (i = 0; i < sym->as->rank; i++)
2952 generate_expr_decls (sym, sym->as->lower[i]);
2953 generate_expr_decls (sym, sym->as->upper[i]);
2959 /* Generate decls for all local variables. We do this to ensure correct
2960 handling of expressions which only appear in the specification of
2964 generate_local_decl (gfc_symbol * sym)
2966 if (sym->attr.flavor == FL_VARIABLE)
2968 /* Check for dependencies in the array specification and string
2969 length, adding the necessary declarations to the function. We
2970 mark the symbol now, as well as in traverse_ns, to prevent
2971 getting stuck in a circular dependency. */
2973 if (!sym->attr.dummy && !sym->ns->proc_name->attr.entry_master)
2974 generate_dependency_declarations (sym);
2976 if (sym->attr.referenced)
2977 gfc_get_symbol_decl (sym);
2978 else if (sym->attr.dummy && warn_unused_parameter)
2979 gfc_warning ("Unused parameter %s declared at %L", sym->name,
2981 /* Warn for unused variables, but not if they're inside a common
2982 block or are use-associated. */
2983 else if (warn_unused_variable
2984 && !(sym->attr.in_common || sym->attr.use_assoc))
2985 gfc_warning ("Unused variable %s declared at %L", sym->name,
2987 /* For variable length CHARACTER parameters, the PARM_DECL already
2988 references the length variable, so force gfc_get_symbol_decl
2989 even when not referenced. If optimize > 0, it will be optimized
2990 away anyway. But do this only after emitting -Wunused-parameter
2991 warning if requested. */
2992 if (sym->attr.dummy && ! sym->attr.referenced
2993 && sym->ts.type == BT_CHARACTER
2994 && sym->ts.cl->backend_decl != NULL
2995 && TREE_CODE (sym->ts.cl->backend_decl) == VAR_DECL)
2997 sym->attr.referenced = 1;
2998 gfc_get_symbol_decl (sym);
3004 generate_local_vars (gfc_namespace * ns)
3006 gfc_traverse_ns (ns, generate_local_decl);
3010 /* Generate a switch statement to jump to the correct entry point. Also
3011 creates the label decls for the entry points. */
3014 gfc_trans_entry_master_switch (gfc_entry_list * el)
3021 gfc_init_block (&block);
3022 for (; el; el = el->next)
3024 /* Add the case label. */
3025 label = gfc_build_label_decl (NULL_TREE);
3026 val = build_int_cst (gfc_array_index_type, el->id);
3027 tmp = build3_v (CASE_LABEL_EXPR, val, NULL_TREE, label);
3028 gfc_add_expr_to_block (&block, tmp);
3030 /* And jump to the actual entry point. */
3031 label = gfc_build_label_decl (NULL_TREE);
3032 tmp = build1_v (GOTO_EXPR, label);
3033 gfc_add_expr_to_block (&block, tmp);
3035 /* Save the label decl. */
3038 tmp = gfc_finish_block (&block);
3039 /* The first argument selects the entry point. */
3040 val = DECL_ARGUMENTS (current_function_decl);
3041 tmp = build3_v (SWITCH_EXPR, val, tmp, NULL_TREE);
3046 /* Generate code for a function. */
3049 gfc_generate_function_code (gfc_namespace * ns)
3062 sym = ns->proc_name;
3064 /* Check that the frontend isn't still using this. */
3065 gcc_assert (sym->tlink == NULL);
3068 /* Create the declaration for functions with global scope. */
3069 if (!sym->backend_decl)
3070 gfc_create_function_decl (ns);
3072 fndecl = sym->backend_decl;
3073 old_context = current_function_decl;
3077 push_function_context ();
3078 saved_parent_function_decls = saved_function_decls;
3079 saved_function_decls = NULL_TREE;
3082 trans_function_start (sym);
3084 gfc_start_block (&block);
3086 if (ns->entries && ns->proc_name->ts.type == BT_CHARACTER)
3088 /* Copy length backend_decls to all entry point result
3093 gfc_conv_const_charlen (ns->proc_name->ts.cl);
3094 backend_decl = ns->proc_name->result->ts.cl->backend_decl;
3095 for (el = ns->entries; el; el = el->next)
3096 el->sym->result->ts.cl->backend_decl = backend_decl;
3099 /* Translate COMMON blocks. */
3100 gfc_trans_common (ns);
3102 /* Null the parent fake result declaration if this namespace is
3103 a module function or an external procedures. */
3104 if ((ns->parent && ns->parent->proc_name->attr.flavor == FL_MODULE)
3105 || ns->parent == NULL)
3106 parent_fake_result_decl = NULL_TREE;
3108 gfc_generate_contained_functions (ns);
3110 generate_local_vars (ns);
3112 /* Keep the parent fake result declaration in module functions
3113 or external procedures. */
3114 if ((ns->parent && ns->parent->proc_name->attr.flavor == FL_MODULE)
3115 || ns->parent == NULL)
3116 current_fake_result_decl = parent_fake_result_decl;
3118 current_fake_result_decl = NULL_TREE;
3120 current_function_return_label = NULL;
3122 /* Now generate the code for the body of this function. */
3123 gfc_init_block (&body);
3125 /* If this is the main program, add a call to set_std to set up the
3126 runtime library Fortran language standard parameters. */
3128 if (sym->attr.is_main_program)
3130 tree arglist, gfc_int4_type_node;
3132 gfc_int4_type_node = gfc_get_int_type (4);
3133 arglist = gfc_chainon_list (NULL_TREE,
3134 build_int_cst (gfc_int4_type_node,
3135 gfc_option.warn_std));
3136 arglist = gfc_chainon_list (arglist,
3137 build_int_cst (gfc_int4_type_node,
3138 gfc_option.allow_std));
3139 arglist = gfc_chainon_list (arglist,
3140 build_int_cst (gfc_int4_type_node,
3142 tmp = build_function_call_expr (gfor_fndecl_set_std, arglist);
3143 gfc_add_expr_to_block (&body, tmp);
3146 /* If this is the main program and a -ffpe-trap option was provided,
3147 add a call to set_fpe so that the library will raise a FPE when
3149 if (sym->attr.is_main_program && gfc_option.fpe != 0)
3151 tree arglist, gfc_c_int_type_node;
3153 gfc_c_int_type_node = gfc_get_int_type (gfc_c_int_kind);
3154 arglist = gfc_chainon_list (NULL_TREE,
3155 build_int_cst (gfc_c_int_type_node,
3157 tmp = build_function_call_expr (gfor_fndecl_set_fpe, arglist);
3158 gfc_add_expr_to_block (&body, tmp);
3161 /* If this is the main program and an -fconvert option was provided,
3162 add a call to set_convert. */
3164 if (sym->attr.is_main_program && gfc_option.convert != CONVERT_NATIVE)
3166 tree arglist, gfc_c_int_type_node;
3168 gfc_c_int_type_node = gfc_get_int_type (gfc_c_int_kind);
3169 arglist = gfc_chainon_list (NULL_TREE,
3170 build_int_cst (gfc_c_int_type_node,
3171 gfc_option.convert));
3172 tmp = build_function_call_expr (gfor_fndecl_set_convert, arglist);
3173 gfc_add_expr_to_block (&body, tmp);
3176 /* If this is the main program and an -frecord-marker option was provided,
3177 add a call to set_record_marker. */
3179 if (sym->attr.is_main_program && gfc_option.record_marker != 0)
3181 tree arglist, gfc_c_int_type_node;
3183 gfc_c_int_type_node = gfc_get_int_type (gfc_c_int_kind);
3184 arglist = gfc_chainon_list (NULL_TREE,
3185 build_int_cst (gfc_c_int_type_node,
3186 gfc_option.record_marker));
3187 tmp = build_function_call_expr (gfor_fndecl_set_record_marker, arglist);
3188 gfc_add_expr_to_block (&body, tmp);
3192 if (sym->attr.is_main_program && gfc_option.max_subrecord_length != 0)
3194 tree arglist, gfc_c_int_type_node;
3196 gfc_c_int_type_node = gfc_get_int_type (gfc_c_int_kind);
3197 arglist = gfc_chainon_list (NULL_TREE,
3198 build_int_cst (gfc_c_int_type_node,
3199 gfc_option.max_subrecord_length));
3200 tmp = build_function_call_expr (gfor_fndecl_set_max_subrecord_length, arglist);
3201 gfc_add_expr_to_block (&body, tmp);
3204 if (TREE_TYPE (DECL_RESULT (fndecl)) != void_type_node
3205 && sym->attr.subroutine)
3207 tree alternate_return;
3208 alternate_return = gfc_get_fake_result_decl (sym, 0);
3209 gfc_add_modify_expr (&body, alternate_return, integer_zero_node);
3214 /* Jump to the correct entry point. */
3215 tmp = gfc_trans_entry_master_switch (ns->entries);
3216 gfc_add_expr_to_block (&body, tmp);
3219 tmp = gfc_trans_code (ns->code);
3220 gfc_add_expr_to_block (&body, tmp);
3222 /* Add a return label if needed. */
3223 if (current_function_return_label)
3225 tmp = build1_v (LABEL_EXPR, current_function_return_label);
3226 gfc_add_expr_to_block (&body, tmp);
3229 tmp = gfc_finish_block (&body);
3230 /* Add code to create and cleanup arrays. */
3231 tmp = gfc_trans_deferred_vars (sym, tmp);
3233 if (TREE_TYPE (DECL_RESULT (fndecl)) != void_type_node)
3235 if (sym->attr.subroutine || sym == sym->result)
3237 if (current_fake_result_decl != NULL)
3238 result = TREE_VALUE (current_fake_result_decl);
3241 current_fake_result_decl = NULL_TREE;
3244 result = sym->result->backend_decl;
3246 if (result != NULL_TREE && sym->attr.function
3247 && sym->ts.type == BT_DERIVED
3248 && sym->ts.derived->attr.alloc_comp)
3250 rank = sym->as ? sym->as->rank : 0;
3251 tmp2 = gfc_nullify_alloc_comp (sym->ts.derived, result, rank);
3252 gfc_add_expr_to_block (&block, tmp2);
3255 gfc_add_expr_to_block (&block, tmp);
3257 if (result == NULL_TREE)
3258 warning (0, "Function return value not set");
3261 /* Set the return value to the dummy result variable. */
3262 tmp = build2 (MODIFY_EXPR, TREE_TYPE (result),
3263 DECL_RESULT (fndecl), result);
3264 tmp = build1_v (RETURN_EXPR, tmp);
3265 gfc_add_expr_to_block (&block, tmp);
3269 gfc_add_expr_to_block (&block, tmp);
3272 /* Add all the decls we created during processing. */
3273 decl = saved_function_decls;
3278 next = TREE_CHAIN (decl);
3279 TREE_CHAIN (decl) = NULL_TREE;
3283 saved_function_decls = NULL_TREE;
3285 DECL_SAVED_TREE (fndecl) = gfc_finish_block (&block);
3287 /* Finish off this function and send it for code generation. */
3289 BLOCK_SUPERCONTEXT (DECL_INITIAL (fndecl)) = fndecl;
3291 /* Output the GENERIC tree. */
3292 dump_function (TDI_original, fndecl);
3294 /* Store the end of the function, so that we get good line number
3295 info for the epilogue. */
3296 cfun->function_end_locus = input_location;
3298 /* We're leaving the context of this function, so zap cfun.
3299 It's still in DECL_STRUCT_FUNCTION, and we'll restore it in
3300 tree_rest_of_compilation. */
3305 pop_function_context ();
3306 saved_function_decls = saved_parent_function_decls;
3308 current_function_decl = old_context;
3310 if (decl_function_context (fndecl))
3311 /* Register this function with cgraph just far enough to get it
3312 added to our parent's nested function list. */
3313 (void) cgraph_node (fndecl);
3316 gfc_gimplify_function (fndecl);
3317 cgraph_finalize_function (fndecl, false);
3322 gfc_generate_constructors (void)
3324 gcc_assert (gfc_static_ctors == NULL_TREE);
3332 if (gfc_static_ctors == NULL_TREE)
3335 fnname = get_file_function_name ("I");
3336 type = build_function_type (void_type_node,
3337 gfc_chainon_list (NULL_TREE, void_type_node));
3339 fndecl = build_decl (FUNCTION_DECL, fnname, type);
3340 TREE_PUBLIC (fndecl) = 1;
3342 decl = build_decl (RESULT_DECL, NULL_TREE, void_type_node);
3343 DECL_ARTIFICIAL (decl) = 1;
3344 DECL_IGNORED_P (decl) = 1;
3345 DECL_CONTEXT (decl) = fndecl;
3346 DECL_RESULT (fndecl) = decl;
3350 current_function_decl = fndecl;
3352 rest_of_decl_compilation (fndecl, 1, 0);
3354 make_decl_rtl (fndecl);
3356 init_function_start (fndecl);
3360 for (; gfc_static_ctors; gfc_static_ctors = TREE_CHAIN (gfc_static_ctors))
3363 build_function_call_expr (TREE_VALUE (gfc_static_ctors), NULL_TREE);
3364 DECL_SAVED_TREE (fndecl) = build_stmt (EXPR_STMT, tmp);
3369 BLOCK_SUPERCONTEXT (DECL_INITIAL (fndecl)) = fndecl;
3371 free_after_parsing (cfun);
3372 free_after_compilation (cfun);
3374 tree_rest_of_compilation (fndecl);
3376 current_function_decl = NULL_TREE;
3380 /* Translates a BLOCK DATA program unit. This means emitting the
3381 commons contained therein plus their initializations. We also emit
3382 a globally visible symbol to make sure that each BLOCK DATA program
3383 unit remains unique. */
3386 gfc_generate_block_data (gfc_namespace * ns)
3391 /* Tell the backend the source location of the block data. */
3393 gfc_set_backend_locus (&ns->proc_name->declared_at);
3395 gfc_set_backend_locus (&gfc_current_locus);
3397 /* Process the DATA statements. */
3398 gfc_trans_common (ns);
3400 /* Create a global symbol with the mane of the block data. This is to
3401 generate linker errors if the same name is used twice. It is never
3404 id = gfc_sym_mangled_function_id (ns->proc_name);
3406 id = get_identifier ("__BLOCK_DATA__");
3408 decl = build_decl (VAR_DECL, id, gfc_array_index_type);
3409 TREE_PUBLIC (decl) = 1;
3410 TREE_STATIC (decl) = 1;
3413 rest_of_decl_compilation (decl, 1, 0);
3417 #include "gt-fortran-trans-decl.h"