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"
42 /* Do nothing; in many cases the default hook. */
49 /* Do nothing (tree). */
52 lhd_do_nothing_t (tree ARG_UNUSED (t))
56 /* Pass through (tree). */
58 lhd_pass_through_t (tree t)
63 /* Do nothing (int). */
66 lhd_do_nothing_i (int ARG_UNUSED (i))
70 /* Do nothing (int, int, int). Return NULL_TREE. */
73 lhd_do_nothing_iii_return_null_tree (int ARG_UNUSED (i),
80 /* Do nothing (function). */
83 lhd_do_nothing_f (struct function * ARG_UNUSED (f))
87 /* Do nothing (return NULL_TREE). */
90 lhd_return_null_tree_v (void)
95 /* Do nothing (return NULL_TREE). */
98 lhd_return_null_tree (tree ARG_UNUSED (t))
103 /* Do nothing (return NULL_TREE). */
106 lhd_return_null_const_tree (const_tree ARG_UNUSED (t))
111 /* The default post options hook. */
114 lhd_post_options (const char ** ARG_UNUSED (pfilename))
116 /* Excess precision other than "fast" requires front-end
118 flag_excess_precision_cmdline = EXCESS_PRECISION_FAST;
122 /* Called from by print-tree.c. */
125 lhd_print_tree_nothing (FILE * ARG_UNUSED (file),
126 tree ARG_UNUSED (node),
127 int ARG_UNUSED (indent))
131 /* Called from check_global_declarations. */
134 lhd_warn_unused_global_decl (const_tree decl)
136 /* This is what used to exist in check_global_declarations. Probably
137 not many of these actually apply to non-C languages. */
139 if (TREE_CODE (decl) == FUNCTION_DECL && DECL_DECLARED_INLINE_P (decl))
141 if (TREE_CODE (decl) == VAR_DECL && TREE_READONLY (decl))
143 if (DECL_IN_SYSTEM_HEADER (decl))
149 /* Set the DECL_ASSEMBLER_NAME for DECL. */
151 lhd_set_decl_assembler_name (tree decl)
155 /* The language-independent code should never use the
156 DECL_ASSEMBLER_NAME for lots of DECLs. Only FUNCTION_DECLs and
157 VAR_DECLs for variables with static storage duration need a real
158 DECL_ASSEMBLER_NAME. */
159 gcc_assert (TREE_CODE (decl) == FUNCTION_DECL
160 || (TREE_CODE (decl) == VAR_DECL
161 && (TREE_STATIC (decl)
162 || DECL_EXTERNAL (decl)
163 || TREE_PUBLIC (decl))));
165 /* By default, assume the name to use in assembly code is the same
166 as that used in the source language. (That's correct for C, and
167 GCC used to set DECL_ASSEMBLER_NAME to the same value as
168 DECL_NAME in build_decl, so this choice provides backwards
169 compatibility with existing front-ends. This assumption is wrapped
170 in a target hook, to allow for target-specific modification of the
173 Can't use just the variable's own name for a variable whose scope
174 is less than the whole compilation. Concatenate a distinguishing
175 number - we use the DECL_UID. */
177 if (TREE_PUBLIC (decl) || DECL_CONTEXT (decl) == NULL_TREE)
178 id = targetm.mangle_decl_assembler_name (decl, DECL_NAME (decl));
181 const char *name = IDENTIFIER_POINTER (DECL_NAME (decl));
184 ASM_FORMAT_PRIVATE_NAME (label, name, DECL_UID (decl));
185 id = get_identifier (label);
187 SET_DECL_ASSEMBLER_NAME (decl, id);
191 /* Type promotion for variable arguments. */
193 lhd_type_promotes_to (tree ARG_UNUSED (type))
198 /* Registration of machine- or os-specific builtin types. */
200 lhd_register_builtin_type (tree ARG_UNUSED (type),
201 const char * ARG_UNUSED (name))
205 /* Invalid use of an incomplete type. */
207 lhd_incomplete_type_error (const_tree ARG_UNUSED (value), const_tree type)
209 gcc_assert (TREE_CODE (type) == ERROR_MARK);
213 /* Provide a default routine for alias sets that always returns -1. This
214 is used by languages that don't need to do anything special. */
217 lhd_get_alias_set (tree ARG_UNUSED (t))
222 /* This is the default decl_printable_name function. */
225 lhd_decl_printable_name (tree decl, int ARG_UNUSED (verbosity))
227 gcc_assert (decl && DECL_NAME (decl));
228 return IDENTIFIER_POINTER (DECL_NAME (decl));
231 /* This is the default dwarf_name function. */
234 lhd_dwarf_name (tree t, int verbosity)
236 gcc_assert (DECL_P (t));
238 return lang_hooks.decl_printable_name (t, verbosity);
241 /* This compares two types for equivalence ("compatible" in C-based languages).
242 This routine should only return 1 if it is sure. It should not be used
243 in contexts where erroneously returning 0 causes problems. */
246 lhd_types_compatible_p (tree x, tree y)
248 return TYPE_MAIN_VARIANT (x) == TYPE_MAIN_VARIANT (y);
251 /* lang_hooks.tree_dump.dump_tree: Dump language-specific parts of tree
252 nodes. Returns nonzero if it does not want the usual dumping of the
256 lhd_tree_dump_dump_tree (void *di ATTRIBUTE_UNUSED, tree t ATTRIBUTE_UNUSED)
261 /* lang_hooks.tree_dump.type_qual: Determine type qualifiers in a
262 language-specific way. */
265 lhd_tree_dump_type_quals (const_tree t)
267 return TYPE_QUALS (t);
270 /* lang_hooks.gimplify_expr re-writes *EXPR_P into GIMPLE form. */
273 lhd_gimplify_expr (tree *expr_p ATTRIBUTE_UNUSED,
274 gimple_seq *pre_p ATTRIBUTE_UNUSED,
275 gimple_seq *post_p ATTRIBUTE_UNUSED)
280 /* lang_hooks.tree_size: Determine the size of a tree with code C,
281 which is a language-specific tree code in category tcc_constant or
282 tcc_exceptional. The default expects never to be called. */
284 lhd_tree_size (enum tree_code c ATTRIBUTE_UNUSED)
289 /* Return true if decl, which is a function decl, may be called by a
293 lhd_decl_ok_for_sibcall (const_tree decl ATTRIBUTE_UNUSED)
298 /* lang_hooks.decls.final_write_globals: perform final processing on
301 write_global_declarations (void)
303 tree globals, decl, *vec;
306 /* This lang hook is dual-purposed, and also finalizes the
308 cgraph_finalize_compilation_unit ();
310 /* Really define vars that have had only a tentative definition.
311 Really output inline functions that must actually be callable
312 and have not been output so far. */
314 globals = lang_hooks.decls.getdecls ();
315 len = list_length (globals);
316 vec = XNEWVEC (tree, len);
318 /* Process the decls in reverse order--earliest first.
319 Put them into VEC from back to front, then take out from front. */
321 for (i = 0, decl = globals; i < len; i++, decl = TREE_CHAIN (decl))
322 vec[len - i - 1] = decl;
324 wrapup_global_declarations (vec, len);
325 check_global_declarations (vec, len);
326 emit_debug_global_declarations (vec, len);
332 /* Called to perform language-specific initialization of CTX. */
334 lhd_initialize_diagnostics (struct diagnostic_context *ctx ATTRIBUTE_UNUSED)
338 /* The default function to print out name of current function that caused
341 lhd_print_error_function (diagnostic_context *context, const char *file,
342 diagnostic_info *diagnostic)
344 if (diagnostic_last_function_changed (context, diagnostic))
346 const char *old_prefix = context->printer->prefix;
347 tree abstract_origin = diagnostic->abstract_origin;
348 char *new_prefix = (file && abstract_origin == NULL)
349 ? file_name_as_prefix (file) : NULL;
351 pp_set_prefix (context->printer, new_prefix);
353 if (current_function_decl == NULL)
354 pp_printf (context->printer, _("At top level:"));
361 ao = BLOCK_ABSTRACT_ORIGIN (abstract_origin);
362 while (TREE_CODE (ao) == BLOCK
363 && BLOCK_ABSTRACT_ORIGIN (ao)
364 && BLOCK_ABSTRACT_ORIGIN (ao) != ao)
365 ao = BLOCK_ABSTRACT_ORIGIN (ao);
366 gcc_assert (TREE_CODE (ao) == FUNCTION_DECL);
370 fndecl = current_function_decl;
372 if (TREE_CODE (TREE_TYPE (fndecl)) == METHOD_TYPE)
374 (context->printer, _("In member function %qs"),
375 identifier_to_locale (lang_hooks.decl_printable_name (fndecl, 2)));
378 (context->printer, _("In function %qs"),
379 identifier_to_locale (lang_hooks.decl_printable_name (fndecl, 2)));
381 while (abstract_origin)
384 tree block = abstract_origin;
386 locus = &BLOCK_SOURCE_LOCATION (block);
388 block = BLOCK_SUPERCONTEXT (block);
389 while (block && TREE_CODE (block) == BLOCK
390 && BLOCK_ABSTRACT_ORIGIN (block))
392 ao = BLOCK_ABSTRACT_ORIGIN (block);
394 while (TREE_CODE (ao) == BLOCK
395 && BLOCK_ABSTRACT_ORIGIN (ao)
396 && BLOCK_ABSTRACT_ORIGIN (ao) != ao)
397 ao = BLOCK_ABSTRACT_ORIGIN (ao);
399 if (TREE_CODE (ao) == FUNCTION_DECL)
404 else if (TREE_CODE (ao) != BLOCK)
407 block = BLOCK_SUPERCONTEXT (block);
410 abstract_origin = block;
413 while (block && TREE_CODE (block) == BLOCK)
414 block = BLOCK_SUPERCONTEXT (block);
416 if (block && TREE_CODE (block) == FUNCTION_DECL)
418 abstract_origin = NULL;
422 expanded_location s = expand_location (*locus);
423 pp_character (context->printer, ',');
424 pp_newline (context->printer);
427 if (flag_show_column)
428 pp_printf (context->printer,
429 _(" inlined from %qs at %s:%d:%d"),
430 identifier_to_locale (lang_hooks.decl_printable_name (fndecl, 2)),
431 s.file, s.line, s.column);
433 pp_printf (context->printer,
434 _(" inlined from %qs at %s:%d"),
435 identifier_to_locale (lang_hooks.decl_printable_name (fndecl, 2)),
440 pp_printf (context->printer, _(" inlined from %qs"),
441 identifier_to_locale (lang_hooks.decl_printable_name (fndecl, 2)));
444 pp_character (context->printer, ':');
447 diagnostic_set_last_function (context, diagnostic);
448 pp_flush (context->printer);
449 context->printer->prefix = old_prefix;
450 free ((char*) new_prefix);
455 lhd_callgraph_analyze_expr (tree *tp ATTRIBUTE_UNUSED,
456 int *walk_subtrees ATTRIBUTE_UNUSED)
462 lhd_make_node (enum tree_code code)
464 return make_node (code);
468 lhd_to_target_charset (HOST_WIDE_INT c)
474 lhd_expr_to_decl (tree expr, bool *tc ATTRIBUTE_UNUSED, bool *se ATTRIBUTE_UNUSED)
479 /* Return sharing kind if OpenMP sharing attribute of DECL is
480 predetermined, OMP_CLAUSE_DEFAULT_UNSPECIFIED otherwise. */
482 enum omp_clause_default_kind
483 lhd_omp_predetermined_sharing (tree decl ATTRIBUTE_UNUSED)
485 if (DECL_ARTIFICIAL (decl))
486 return OMP_CLAUSE_DEFAULT_SHARED;
487 return OMP_CLAUSE_DEFAULT_UNSPECIFIED;
490 /* Generate code to copy SRC to DST. */
493 lhd_omp_assignment (tree clause ATTRIBUTE_UNUSED, tree dst, tree src)
495 return build2 (MODIFY_EXPR, TREE_TYPE (dst), dst, src);
498 /* Register language specific type size variables as potentially OpenMP
499 firstprivate variables. */
502 lhd_omp_firstprivatize_type_sizes (struct gimplify_omp_ctx *c ATTRIBUTE_UNUSED,
503 tree t ATTRIBUTE_UNUSED)
507 /* Common function for add_builtin_function and
508 add_builtin_function_ext_scope. */
510 add_builtin_function_common (const char *name,
513 enum built_in_class cl,
514 const char *library_name,
518 tree id = get_identifier (name);
519 tree decl = build_decl (BUILTINS_LOCATION, FUNCTION_DECL, id, type);
521 TREE_PUBLIC (decl) = 1;
522 DECL_EXTERNAL (decl) = 1;
523 DECL_BUILT_IN_CLASS (decl) = cl;
525 DECL_FUNCTION_CODE (decl) = (enum built_in_function) function_code;
527 /* DECL_FUNCTION_CODE is a bitfield; verify that the value fits. */
528 gcc_assert (DECL_FUNCTION_CODE (decl) == function_code);
532 tree libname = get_identifier (library_name);
533 SET_DECL_ASSEMBLER_NAME (decl, libname);
536 /* Possibly apply some default attributes to this built-in function. */
538 decl_attributes (&decl, attrs, ATTR_FLAG_BUILT_IN);
540 decl_attributes (&decl, NULL_TREE, 0);
546 /* Create a builtin function. */
549 add_builtin_function (const char *name,
552 enum built_in_class cl,
553 const char *library_name,
556 return add_builtin_function_common (name, type, function_code, cl,
558 lang_hooks.builtin_function);
561 /* Like add_builtin_function, but make sure the scope is the external scope.
562 This is used to delay putting in back end builtin functions until the ISA
563 that defines the builtin is declared via function specific target options,
564 which can save memory for machines like the x86_64 that have multiple ISAs.
565 If this points to the same function as builtin_function, the backend must
566 add all of the builtins at program initialization time. */
569 add_builtin_function_ext_scope (const char *name,
572 enum built_in_class cl,
573 const char *library_name,
576 return add_builtin_function_common (name, type, function_code, cl,
578 lang_hooks.builtin_function_ext_scope);
582 lhd_builtin_function (tree decl)
584 lang_hooks.decls.pushdecl (decl);