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 /* Do nothing (int). */
59 lhd_do_nothing_i (int ARG_UNUSED (i))
63 /* Do nothing (int, int, int). Return NULL_TREE. */
66 lhd_do_nothing_iii_return_null_tree (int ARG_UNUSED (i),
73 /* Do nothing (function). */
76 lhd_do_nothing_f (struct function * ARG_UNUSED (f))
80 /* Do nothing (return NULL_TREE). */
83 lhd_return_null_tree_v (void)
88 /* Do nothing (return NULL_TREE). */
91 lhd_return_null_tree (tree ARG_UNUSED (t))
96 /* Do nothing (return NULL_TREE). */
99 lhd_return_null_const_tree (const_tree ARG_UNUSED (t))
104 /* The default post options hook. */
107 lhd_post_options (const char ** ARG_UNUSED (pfilename))
109 /* Excess precision other than "fast" requires front-end
111 flag_excess_precision_cmdline = EXCESS_PRECISION_FAST;
115 /* Called from by print-tree.c. */
118 lhd_print_tree_nothing (FILE * ARG_UNUSED (file),
119 tree ARG_UNUSED (node),
120 int ARG_UNUSED (indent))
124 /* Called from check_global_declarations. */
127 lhd_warn_unused_global_decl (const_tree decl)
129 /* This is what used to exist in check_global_declarations. Probably
130 not many of these actually apply to non-C languages. */
132 if (TREE_CODE (decl) == FUNCTION_DECL && DECL_DECLARED_INLINE_P (decl))
134 if (TREE_CODE (decl) == VAR_DECL && TREE_READONLY (decl))
136 if (DECL_IN_SYSTEM_HEADER (decl))
142 /* Set the DECL_ASSEMBLER_NAME for DECL. */
144 lhd_set_decl_assembler_name (tree decl)
148 /* The language-independent code should never use the
149 DECL_ASSEMBLER_NAME for lots of DECLs. Only FUNCTION_DECLs and
150 VAR_DECLs for variables with static storage duration need a real
151 DECL_ASSEMBLER_NAME. */
152 gcc_assert (TREE_CODE (decl) == FUNCTION_DECL
153 || (TREE_CODE (decl) == VAR_DECL
154 && (TREE_STATIC (decl)
155 || DECL_EXTERNAL (decl)
156 || TREE_PUBLIC (decl))));
158 /* By default, assume the name to use in assembly code is the same
159 as that used in the source language. (That's correct for C, and
160 GCC used to set DECL_ASSEMBLER_NAME to the same value as
161 DECL_NAME in build_decl, so this choice provides backwards
162 compatibility with existing front-ends. This assumption is wrapped
163 in a target hook, to allow for target-specific modification of the
166 Can't use just the variable's own name for a variable whose scope
167 is less than the whole compilation. Concatenate a distinguishing
168 number - we use the DECL_UID. */
170 if (TREE_PUBLIC (decl) || DECL_CONTEXT (decl) == NULL_TREE)
171 id = targetm.mangle_decl_assembler_name (decl, DECL_NAME (decl));
174 const char *name = IDENTIFIER_POINTER (DECL_NAME (decl));
177 ASM_FORMAT_PRIVATE_NAME (label, name, DECL_UID (decl));
178 id = get_identifier (label);
180 SET_DECL_ASSEMBLER_NAME (decl, id);
184 /* Type promotion for variable arguments. */
186 lhd_type_promotes_to (tree ARG_UNUSED (type))
191 /* Registration of machine- or os-specific builtin types. */
193 lhd_register_builtin_type (tree ARG_UNUSED (type),
194 const char * ARG_UNUSED (name))
198 /* Invalid use of an incomplete type. */
200 lhd_incomplete_type_error (const_tree ARG_UNUSED (value), const_tree type)
202 gcc_assert (TREE_CODE (type) == ERROR_MARK);
206 /* Provide a default routine for alias sets that always returns -1. This
207 is used by languages that don't need to do anything special. */
210 lhd_get_alias_set (tree ARG_UNUSED (t))
215 /* This is the default decl_printable_name function. */
218 lhd_decl_printable_name (tree decl, int ARG_UNUSED (verbosity))
220 gcc_assert (decl && DECL_NAME (decl));
221 return IDENTIFIER_POINTER (DECL_NAME (decl));
224 /* This is the default dwarf_name function. */
227 lhd_dwarf_name (tree t, int verbosity)
229 gcc_assert (DECL_P (t));
231 return lang_hooks.decl_printable_name (t, verbosity);
234 /* This compares two types for equivalence ("compatible" in C-based languages).
235 This routine should only return 1 if it is sure. It should not be used
236 in contexts where erroneously returning 0 causes problems. */
239 lhd_types_compatible_p (tree x, tree y)
241 return TYPE_MAIN_VARIANT (x) == TYPE_MAIN_VARIANT (y);
244 /* lang_hooks.tree_dump.dump_tree: Dump language-specific parts of tree
245 nodes. Returns nonzero if it does not want the usual dumping of the
249 lhd_tree_dump_dump_tree (void *di ATTRIBUTE_UNUSED, tree t ATTRIBUTE_UNUSED)
254 /* lang_hooks.tree_dump.type_qual: Determine type qualifiers in a
255 language-specific way. */
258 lhd_tree_dump_type_quals (const_tree t)
260 return TYPE_QUALS (t);
263 /* lang_hooks.gimplify_expr re-writes *EXPR_P into GIMPLE form. */
266 lhd_gimplify_expr (tree *expr_p ATTRIBUTE_UNUSED,
267 gimple_seq *pre_p ATTRIBUTE_UNUSED,
268 gimple_seq *post_p ATTRIBUTE_UNUSED)
273 /* lang_hooks.tree_size: Determine the size of a tree with code C,
274 which is a language-specific tree code in category tcc_constant or
275 tcc_exceptional. The default expects never to be called. */
277 lhd_tree_size (enum tree_code c ATTRIBUTE_UNUSED)
282 /* Return true if decl, which is a function decl, may be called by a
286 lhd_decl_ok_for_sibcall (const_tree decl ATTRIBUTE_UNUSED)
291 /* lang_hooks.decls.final_write_globals: perform final processing on
294 write_global_declarations (void)
296 tree globals, decl, *vec;
299 /* This lang hook is dual-purposed, and also finalizes the
301 cgraph_finalize_compilation_unit ();
303 /* Really define vars that have had only a tentative definition.
304 Really output inline functions that must actually be callable
305 and have not been output so far. */
307 globals = lang_hooks.decls.getdecls ();
308 len = list_length (globals);
309 vec = XNEWVEC (tree, len);
311 /* Process the decls in reverse order--earliest first.
312 Put them into VEC from back to front, then take out from front. */
314 for (i = 0, decl = globals; i < len; i++, decl = TREE_CHAIN (decl))
315 vec[len - i - 1] = decl;
317 wrapup_global_declarations (vec, len);
318 check_global_declarations (vec, len);
319 emit_debug_global_declarations (vec, len);
325 /* Called to perform language-specific initialization of CTX. */
327 lhd_initialize_diagnostics (struct diagnostic_context *ctx ATTRIBUTE_UNUSED)
331 /* The default function to print out name of current function that caused
334 lhd_print_error_function (diagnostic_context *context, const char *file,
335 diagnostic_info *diagnostic)
337 if (diagnostic_last_function_changed (context, diagnostic))
339 const char *old_prefix = context->printer->prefix;
340 tree abstract_origin = diagnostic->abstract_origin;
341 char *new_prefix = (file && abstract_origin == NULL)
342 ? file_name_as_prefix (file) : NULL;
344 pp_set_prefix (context->printer, new_prefix);
346 if (current_function_decl == NULL)
347 pp_printf (context->printer, _("At top level:"));
354 ao = BLOCK_ABSTRACT_ORIGIN (abstract_origin);
355 while (TREE_CODE (ao) == BLOCK
356 && BLOCK_ABSTRACT_ORIGIN (ao)
357 && BLOCK_ABSTRACT_ORIGIN (ao) != ao)
358 ao = BLOCK_ABSTRACT_ORIGIN (ao);
359 gcc_assert (TREE_CODE (ao) == FUNCTION_DECL);
363 fndecl = current_function_decl;
365 if (TREE_CODE (TREE_TYPE (fndecl)) == METHOD_TYPE)
367 (context->printer, _("In member function %qs"),
368 identifier_to_locale (lang_hooks.decl_printable_name (fndecl, 2)));
371 (context->printer, _("In function %qs"),
372 identifier_to_locale (lang_hooks.decl_printable_name (fndecl, 2)));
374 while (abstract_origin)
377 tree block = abstract_origin;
379 locus = &BLOCK_SOURCE_LOCATION (block);
381 block = BLOCK_SUPERCONTEXT (block);
382 while (block && TREE_CODE (block) == BLOCK
383 && BLOCK_ABSTRACT_ORIGIN (block))
385 ao = BLOCK_ABSTRACT_ORIGIN (block);
387 while (TREE_CODE (ao) == BLOCK
388 && BLOCK_ABSTRACT_ORIGIN (ao)
389 && BLOCK_ABSTRACT_ORIGIN (ao) != ao)
390 ao = BLOCK_ABSTRACT_ORIGIN (ao);
392 if (TREE_CODE (ao) == FUNCTION_DECL)
397 else if (TREE_CODE (ao) != BLOCK)
400 block = BLOCK_SUPERCONTEXT (block);
403 abstract_origin = block;
406 while (block && TREE_CODE (block) == BLOCK)
407 block = BLOCK_SUPERCONTEXT (block);
409 if (block && TREE_CODE (block) == FUNCTION_DECL)
411 abstract_origin = NULL;
415 expanded_location s = expand_location (*locus);
416 pp_character (context->printer, ',');
417 pp_newline (context->printer);
420 if (flag_show_column)
421 pp_printf (context->printer,
422 _(" inlined from %qs at %s:%d:%d"),
423 identifier_to_locale (lang_hooks.decl_printable_name (fndecl, 2)),
424 s.file, s.line, s.column);
426 pp_printf (context->printer,
427 _(" inlined from %qs at %s:%d"),
428 identifier_to_locale (lang_hooks.decl_printable_name (fndecl, 2)),
433 pp_printf (context->printer, _(" inlined from %qs"),
434 identifier_to_locale (lang_hooks.decl_printable_name (fndecl, 2)));
437 pp_character (context->printer, ':');
440 diagnostic_set_last_function (context, diagnostic);
441 pp_flush (context->printer);
442 context->printer->prefix = old_prefix;
443 free ((char*) new_prefix);
448 lhd_callgraph_analyze_expr (tree *tp ATTRIBUTE_UNUSED,
449 int *walk_subtrees ATTRIBUTE_UNUSED)
455 lhd_make_node (enum tree_code code)
457 return make_node (code);
461 lhd_to_target_charset (HOST_WIDE_INT c)
467 lhd_expr_to_decl (tree expr, bool *tc ATTRIBUTE_UNUSED, bool *se ATTRIBUTE_UNUSED)
472 /* Return sharing kind if OpenMP sharing attribute of DECL is
473 predetermined, OMP_CLAUSE_DEFAULT_UNSPECIFIED otherwise. */
475 enum omp_clause_default_kind
476 lhd_omp_predetermined_sharing (tree decl ATTRIBUTE_UNUSED)
478 if (DECL_ARTIFICIAL (decl))
479 return OMP_CLAUSE_DEFAULT_SHARED;
480 return OMP_CLAUSE_DEFAULT_UNSPECIFIED;
483 /* Generate code to copy SRC to DST. */
486 lhd_omp_assignment (tree clause ATTRIBUTE_UNUSED, tree dst, tree src)
488 return build2 (MODIFY_EXPR, TREE_TYPE (dst), dst, src);
491 /* Register language specific type size variables as potentially OpenMP
492 firstprivate variables. */
495 lhd_omp_firstprivatize_type_sizes (struct gimplify_omp_ctx *c ATTRIBUTE_UNUSED,
496 tree t ATTRIBUTE_UNUSED)
500 /* Common function for add_builtin_function and
501 add_builtin_function_ext_scope. */
503 add_builtin_function_common (const char *name,
506 enum built_in_class cl,
507 const char *library_name,
511 tree id = get_identifier (name);
512 tree decl = build_decl (BUILTINS_LOCATION, FUNCTION_DECL, id, type);
514 TREE_PUBLIC (decl) = 1;
515 DECL_EXTERNAL (decl) = 1;
516 DECL_BUILT_IN_CLASS (decl) = cl;
518 DECL_FUNCTION_CODE (decl) = (enum built_in_function) function_code;
520 /* DECL_FUNCTION_CODE is a bitfield; verify that the value fits. */
521 gcc_assert (DECL_FUNCTION_CODE (decl) == function_code);
525 tree libname = get_identifier (library_name);
526 SET_DECL_ASSEMBLER_NAME (decl, libname);
529 /* Possibly apply some default attributes to this built-in function. */
531 decl_attributes (&decl, attrs, ATTR_FLAG_BUILT_IN);
533 decl_attributes (&decl, NULL_TREE, 0);
539 /* Create a builtin function. */
542 add_builtin_function (const char *name,
545 enum built_in_class cl,
546 const char *library_name,
549 return add_builtin_function_common (name, type, function_code, cl,
551 lang_hooks.builtin_function);
554 /* Like add_builtin_function, but make sure the scope is the external scope.
555 This is used to delay putting in back end builtin functions until the ISA
556 that defines the builtin is declared via function specific target options,
557 which can save memory for machines like the x86_64 that have multiple ISAs.
558 If this points to the same function as builtin_function, the backend must
559 add all of the builtins at program initialization time. */
562 add_builtin_function_ext_scope (const char *name,
565 enum built_in_class cl,
566 const char *library_name,
569 return add_builtin_function_common (name, type, function_code, cl,
571 lang_hooks.builtin_function_ext_scope);
575 lhd_builtin_function (tree decl)
577 lang_hooks.decls.pushdecl (decl);