1 /* Default language-specific hooks.
2 Copyright 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009
3 Free Software Foundation, Inc.
4 Contributed by Alexandre Oliva <aoliva@redhat.com>
6 This file is part of GCC.
8 GCC is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3, or (at your option)
13 GCC is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with GCC; see the file COPYING3. If not see
20 <http://www.gnu.org/licenses/>. */
24 #include "coretypes.h"
29 #include "tree-inline.h"
32 #include "insn-config.h"
33 #include "integrate.h"
35 #include "langhooks.h"
37 #include "langhooks-def.h"
39 #include "diagnostic.h"
41 /* Do nothing; in many cases the default hook. */
48 /* Do nothing (tree). */
51 lhd_do_nothing_t (tree ARG_UNUSED (t))
55 /* Do nothing (int). */
58 lhd_do_nothing_i (int ARG_UNUSED (i))
62 /* Do nothing (int, int, int). Return NULL_TREE. */
65 lhd_do_nothing_iii_return_null_tree (int ARG_UNUSED (i),
72 /* Do nothing (function). */
75 lhd_do_nothing_f (struct function * ARG_UNUSED (f))
79 /* Do nothing (return NULL_TREE). */
82 lhd_return_null_tree_v (void)
87 /* Do nothing (return NULL_TREE). */
90 lhd_return_null_tree (tree ARG_UNUSED (t))
95 /* Do nothing (return NULL_TREE). */
98 lhd_return_null_const_tree (const_tree ARG_UNUSED (t))
103 /* The default post options hook. */
106 lhd_post_options (const char ** ARG_UNUSED (pfilename))
111 /* Called from by print-tree.c. */
114 lhd_print_tree_nothing (FILE * ARG_UNUSED (file),
115 tree ARG_UNUSED (node),
116 int ARG_UNUSED (indent))
120 /* Called from check_global_declarations. */
123 lhd_warn_unused_global_decl (const_tree decl)
125 /* This is what used to exist in check_global_declarations. Probably
126 not many of these actually apply to non-C languages. */
128 if (TREE_CODE (decl) == FUNCTION_DECL && DECL_DECLARED_INLINE_P (decl))
130 if (TREE_CODE (decl) == VAR_DECL && TREE_READONLY (decl))
132 if (DECL_IN_SYSTEM_HEADER (decl))
138 /* Set the DECL_ASSEMBLER_NAME for DECL. */
140 lhd_set_decl_assembler_name (tree decl)
144 /* The language-independent code should never use the
145 DECL_ASSEMBLER_NAME for lots of DECLs. Only FUNCTION_DECLs and
146 VAR_DECLs for variables with static storage duration need a real
147 DECL_ASSEMBLER_NAME. */
148 gcc_assert (TREE_CODE (decl) == FUNCTION_DECL
149 || (TREE_CODE (decl) == VAR_DECL
150 && (TREE_STATIC (decl)
151 || DECL_EXTERNAL (decl)
152 || TREE_PUBLIC (decl))));
154 /* By default, assume the name to use in assembly code is the same
155 as that used in the source language. (That's correct for C, and
156 GCC used to set DECL_ASSEMBLER_NAME to the same value as
157 DECL_NAME in build_decl, so this choice provides backwards
158 compatibility with existing front-ends. This assumption is wrapped
159 in a target hook, to allow for target-specific modification of the
162 Can't use just the variable's own name for a variable whose scope
163 is less than the whole compilation. Concatenate a distinguishing
164 number - we use the DECL_UID. */
166 if (TREE_PUBLIC (decl) || DECL_CONTEXT (decl) == NULL_TREE)
167 id = targetm.mangle_decl_assembler_name (decl, DECL_NAME (decl));
170 const char *name = IDENTIFIER_POINTER (DECL_NAME (decl));
173 ASM_FORMAT_PRIVATE_NAME (label, name, DECL_UID (decl));
174 id = get_identifier (label);
176 SET_DECL_ASSEMBLER_NAME (decl, id);
180 /* Type promotion for variable arguments. */
182 lhd_type_promotes_to (tree ARG_UNUSED (type))
187 /* Registration of machine- or os-specific builtin types. */
189 lhd_register_builtin_type (tree ARG_UNUSED (type),
190 const char * ARG_UNUSED (name))
194 /* Invalid use of an incomplete type. */
196 lhd_incomplete_type_error (const_tree ARG_UNUSED (value), const_tree type)
198 gcc_assert (TREE_CODE (type) == ERROR_MARK);
202 /* Provide a default routine for alias sets that always returns -1. This
203 is used by languages that don't need to do anything special. */
206 lhd_get_alias_set (tree ARG_UNUSED (t))
211 /* This is the default decl_printable_name function. */
214 lhd_decl_printable_name (tree decl, int ARG_UNUSED (verbosity))
216 gcc_assert (decl && DECL_NAME (decl));
217 return IDENTIFIER_POINTER (DECL_NAME (decl));
220 /* This is the default dwarf_name function. */
223 lhd_dwarf_name (tree t, int verbosity)
225 gcc_assert (DECL_P (t));
227 return lang_hooks.decl_printable_name (t, verbosity);
230 /* This compares two types for equivalence ("compatible" in C-based languages).
231 This routine should only return 1 if it is sure. It should not be used
232 in contexts where erroneously returning 0 causes problems. */
235 lhd_types_compatible_p (tree x, tree y)
237 return TYPE_MAIN_VARIANT (x) == TYPE_MAIN_VARIANT (y);
240 /* lang_hooks.tree_dump.dump_tree: Dump language-specific parts of tree
241 nodes. Returns nonzero if it does not want the usual dumping of the
245 lhd_tree_dump_dump_tree (void *di ATTRIBUTE_UNUSED, tree t ATTRIBUTE_UNUSED)
250 /* lang_hooks.tree_dump.type_qual: Determine type qualifiers in a
251 language-specific way. */
254 lhd_tree_dump_type_quals (const_tree t)
256 return TYPE_QUALS (t);
259 /* lang_hooks.expr_size: Determine the size of the value of an expression T
260 in a language-specific way. Returns a tree for the size in bytes. */
263 lhd_expr_size (const_tree exp)
266 && DECL_SIZE_UNIT (exp) != 0)
267 return DECL_SIZE_UNIT (exp);
269 return size_in_bytes (TREE_TYPE (exp));
272 /* lang_hooks.gimplify_expr re-writes *EXPR_P into GIMPLE form. */
275 lhd_gimplify_expr (tree *expr_p ATTRIBUTE_UNUSED,
276 gimple_seq *pre_p ATTRIBUTE_UNUSED,
277 gimple_seq *post_p ATTRIBUTE_UNUSED)
282 /* lang_hooks.tree_size: Determine the size of a tree with code C,
283 which is a language-specific tree code in category tcc_constant or
284 tcc_exceptional. The default expects never to be called. */
286 lhd_tree_size (enum tree_code c ATTRIBUTE_UNUSED)
291 /* Return true if decl, which is a function decl, may be called by a
295 lhd_decl_ok_for_sibcall (const_tree decl ATTRIBUTE_UNUSED)
300 /* Return the COMDAT group into which DECL should be placed. */
303 lhd_comdat_group (tree decl)
305 return IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl));
308 /* lang_hooks.decls.final_write_globals: perform final processing on
311 write_global_declarations (void)
313 /* Really define vars that have had only a tentative definition.
314 Really output inline functions that must actually be callable
315 and have not been output so far. */
317 tree globals = lang_hooks.decls.getdecls ();
318 int len = list_length (globals);
319 tree *vec = XNEWVEC (tree, len);
323 /* Process the decls in reverse order--earliest first.
324 Put them into VEC from back to front, then take out from front. */
326 for (i = 0, decl = globals; i < len; i++, decl = TREE_CHAIN (decl))
327 vec[len - i - 1] = decl;
329 wrapup_global_declarations (vec, len);
330 check_global_declarations (vec, len);
331 emit_debug_global_declarations (vec, len);
337 /* Called to perform language-specific initialization of CTX. */
339 lhd_initialize_diagnostics (struct diagnostic_context *ctx ATTRIBUTE_UNUSED)
343 /* The default function to print out name of current function that caused
346 lhd_print_error_function (diagnostic_context *context, const char *file,
347 diagnostic_info *diagnostic)
349 if (diagnostic_last_function_changed (context, diagnostic))
351 const char *old_prefix = context->printer->prefix;
352 tree abstract_origin = diagnostic->abstract_origin;
353 char *new_prefix = (file && abstract_origin == NULL)
354 ? file_name_as_prefix (file) : NULL;
356 pp_set_prefix (context->printer, new_prefix);
358 if (current_function_decl == NULL)
359 pp_printf (context->printer, _("At top level:"));
366 ao = BLOCK_ABSTRACT_ORIGIN (abstract_origin);
367 while (TREE_CODE (ao) == BLOCK
368 && BLOCK_ABSTRACT_ORIGIN (ao)
369 && BLOCK_ABSTRACT_ORIGIN (ao) != ao)
370 ao = BLOCK_ABSTRACT_ORIGIN (ao);
371 gcc_assert (TREE_CODE (ao) == FUNCTION_DECL);
375 fndecl = current_function_decl;
377 if (TREE_CODE (TREE_TYPE (fndecl)) == METHOD_TYPE)
379 (context->printer, _("In member function %qs"),
380 lang_hooks.decl_printable_name (fndecl, 2));
383 (context->printer, _("In function %qs"),
384 lang_hooks.decl_printable_name (fndecl, 2));
386 while (abstract_origin)
389 tree block = abstract_origin;
391 locus = &BLOCK_SOURCE_LOCATION (block);
393 block = BLOCK_SUPERCONTEXT (block);
394 while (block && TREE_CODE (block) == BLOCK
395 && BLOCK_ABSTRACT_ORIGIN (block))
397 ao = BLOCK_ABSTRACT_ORIGIN (block);
399 while (TREE_CODE (ao) == BLOCK
400 && BLOCK_ABSTRACT_ORIGIN (ao)
401 && BLOCK_ABSTRACT_ORIGIN (ao) != ao)
402 ao = BLOCK_ABSTRACT_ORIGIN (ao);
404 if (TREE_CODE (ao) == FUNCTION_DECL)
409 else if (TREE_CODE (ao) != BLOCK)
412 block = BLOCK_SUPERCONTEXT (block);
415 abstract_origin = block;
418 while (block && TREE_CODE (block) == BLOCK)
419 block = BLOCK_SUPERCONTEXT (block);
421 if (block && TREE_CODE (block) == FUNCTION_DECL)
423 abstract_origin = NULL;
427 expanded_location s = expand_location (*locus);
428 pp_character (context->printer, ',');
429 pp_newline (context->printer);
432 if (flag_show_column && s.column != 0)
433 pp_printf (context->printer,
434 _(" inlined from %qs at %s:%d:%d"),
435 lang_hooks.decl_printable_name (fndecl, 2),
436 s.file, s.line, s.column);
438 pp_printf (context->printer,
439 _(" inlined from %qs at %s:%d"),
440 lang_hooks.decl_printable_name (fndecl, 2),
445 pp_printf (context->printer, _(" inlined from %qs"),
446 lang_hooks.decl_printable_name (fndecl, 2));
449 pp_character (context->printer, ':');
452 diagnostic_set_last_function (context, diagnostic);
453 pp_flush (context->printer);
454 context->printer->prefix = old_prefix;
455 free ((char*) new_prefix);
460 lhd_callgraph_analyze_expr (tree *tp ATTRIBUTE_UNUSED,
461 int *walk_subtrees ATTRIBUTE_UNUSED)
467 lhd_make_node (enum tree_code code)
469 return make_node (code);
473 lhd_to_target_charset (HOST_WIDE_INT c)
479 lhd_expr_to_decl (tree expr, bool *tc ATTRIBUTE_UNUSED, bool *se ATTRIBUTE_UNUSED)
484 /* Return sharing kind if OpenMP sharing attribute of DECL is
485 predetermined, OMP_CLAUSE_DEFAULT_UNSPECIFIED otherwise. */
487 enum omp_clause_default_kind
488 lhd_omp_predetermined_sharing (tree decl ATTRIBUTE_UNUSED)
490 if (DECL_ARTIFICIAL (decl))
491 return OMP_CLAUSE_DEFAULT_SHARED;
492 return OMP_CLAUSE_DEFAULT_UNSPECIFIED;
495 /* Generate code to copy SRC to DST. */
498 lhd_omp_assignment (tree clause ATTRIBUTE_UNUSED, tree dst, tree src)
500 return build2 (MODIFY_EXPR, TREE_TYPE (dst), dst, src);
503 /* Register language specific type size variables as potentially OpenMP
504 firstprivate variables. */
507 lhd_omp_firstprivatize_type_sizes (struct gimplify_omp_ctx *c ATTRIBUTE_UNUSED,
508 tree t ATTRIBUTE_UNUSED)
512 /* Common function for add_builtin_function and
513 add_builtin_function_ext_scope. */
515 add_builtin_function_common (const char *name,
518 enum built_in_class cl,
519 const char *library_name,
523 tree id = get_identifier (name);
524 tree decl = build_decl (FUNCTION_DECL, id, type);
526 TREE_PUBLIC (decl) = 1;
527 DECL_EXTERNAL (decl) = 1;
528 DECL_BUILT_IN_CLASS (decl) = cl;
530 DECL_FUNCTION_CODE (decl) = -1;
531 gcc_assert (DECL_FUNCTION_CODE (decl) >= function_code);
532 DECL_FUNCTION_CODE (decl) = function_code;
536 tree libname = get_identifier (library_name);
537 SET_DECL_ASSEMBLER_NAME (decl, libname);
540 /* Possibly apply some default attributes to this built-in function. */
542 decl_attributes (&decl, attrs, ATTR_FLAG_BUILT_IN);
544 decl_attributes (&decl, NULL_TREE, 0);
550 /* Create a builtin function. */
553 add_builtin_function (const char *name,
556 enum built_in_class cl,
557 const char *library_name,
560 return add_builtin_function_common (name, type, function_code, cl,
562 lang_hooks.builtin_function);
565 /* Like add_builtin_function, but make sure the scope is the external scope.
566 This is used to delay putting in back end builtin functions until the ISA
567 that defines the builtin is declared via function specific target options,
568 which can save memory for machines like the x86_64 that have multiple ISAs.
569 If this points to the same function as builtin_function, the backend must
570 add all of the builtins at program initialization time. */
573 add_builtin_function_ext_scope (const char *name,
576 enum built_in_class cl,
577 const char *library_name,
580 return add_builtin_function_common (name, type, function_code, cl,
582 lang_hooks.builtin_function_ext_scope);
586 lhd_builtin_function (tree decl)
588 lang_hooks.decls.pushdecl (decl);