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
))
108 /* Excess precision other than "fast" requires front-end
110 flag_excess_precision_cmdline
= EXCESS_PRECISION_FAST
;
114 /* Called from by print-tree.c. */
117 lhd_print_tree_nothing (FILE * ARG_UNUSED (file
),
118 tree
ARG_UNUSED (node
),
119 int ARG_UNUSED (indent
))
123 /* Called from check_global_declarations. */
126 lhd_warn_unused_global_decl (const_tree decl
)
128 /* This is what used to exist in check_global_declarations. Probably
129 not many of these actually apply to non-C languages. */
131 if (TREE_CODE (decl
) == FUNCTION_DECL
&& DECL_DECLARED_INLINE_P (decl
))
133 if (TREE_CODE (decl
) == VAR_DECL
&& TREE_READONLY (decl
))
135 if (DECL_IN_SYSTEM_HEADER (decl
))
141 /* Set the DECL_ASSEMBLER_NAME for DECL. */
143 lhd_set_decl_assembler_name (tree decl
)
147 /* The language-independent code should never use the
148 DECL_ASSEMBLER_NAME for lots of DECLs. Only FUNCTION_DECLs and
149 VAR_DECLs for variables with static storage duration need a real
150 DECL_ASSEMBLER_NAME. */
151 gcc_assert (TREE_CODE (decl
) == FUNCTION_DECL
152 || (TREE_CODE (decl
) == VAR_DECL
153 && (TREE_STATIC (decl
)
154 || DECL_EXTERNAL (decl
)
155 || TREE_PUBLIC (decl
))));
157 /* By default, assume the name to use in assembly code is the same
158 as that used in the source language. (That's correct for C, and
159 GCC used to set DECL_ASSEMBLER_NAME to the same value as
160 DECL_NAME in build_decl, so this choice provides backwards
161 compatibility with existing front-ends. This assumption is wrapped
162 in a target hook, to allow for target-specific modification of the
165 Can't use just the variable's own name for a variable whose scope
166 is less than the whole compilation. Concatenate a distinguishing
167 number - we use the DECL_UID. */
169 if (TREE_PUBLIC (decl
) || DECL_CONTEXT (decl
) == NULL_TREE
)
170 id
= targetm
.mangle_decl_assembler_name (decl
, DECL_NAME (decl
));
173 const char *name
= IDENTIFIER_POINTER (DECL_NAME (decl
));
176 ASM_FORMAT_PRIVATE_NAME (label
, name
, DECL_UID (decl
));
177 id
= get_identifier (label
);
179 SET_DECL_ASSEMBLER_NAME (decl
, id
);
183 /* Type promotion for variable arguments. */
185 lhd_type_promotes_to (tree
ARG_UNUSED (type
))
190 /* Registration of machine- or os-specific builtin types. */
192 lhd_register_builtin_type (tree
ARG_UNUSED (type
),
193 const char * ARG_UNUSED (name
))
197 /* Invalid use of an incomplete type. */
199 lhd_incomplete_type_error (const_tree
ARG_UNUSED (value
), const_tree type
)
201 gcc_assert (TREE_CODE (type
) == ERROR_MARK
);
205 /* Provide a default routine for alias sets that always returns -1. This
206 is used by languages that don't need to do anything special. */
209 lhd_get_alias_set (tree
ARG_UNUSED (t
))
214 /* This is the default decl_printable_name function. */
217 lhd_decl_printable_name (tree decl
, int ARG_UNUSED (verbosity
))
219 gcc_assert (decl
&& DECL_NAME (decl
));
220 return IDENTIFIER_POINTER (DECL_NAME (decl
));
223 /* This is the default dwarf_name function. */
226 lhd_dwarf_name (tree t
, int verbosity
)
228 gcc_assert (DECL_P (t
));
230 return lang_hooks
.decl_printable_name (t
, verbosity
);
233 /* This compares two types for equivalence ("compatible" in C-based languages).
234 This routine should only return 1 if it is sure. It should not be used
235 in contexts where erroneously returning 0 causes problems. */
238 lhd_types_compatible_p (tree x
, tree y
)
240 return TYPE_MAIN_VARIANT (x
) == TYPE_MAIN_VARIANT (y
);
243 /* lang_hooks.tree_dump.dump_tree: Dump language-specific parts of tree
244 nodes. Returns nonzero if it does not want the usual dumping of the
248 lhd_tree_dump_dump_tree (void *di ATTRIBUTE_UNUSED
, tree t ATTRIBUTE_UNUSED
)
253 /* lang_hooks.tree_dump.type_qual: Determine type qualifiers in a
254 language-specific way. */
257 lhd_tree_dump_type_quals (const_tree t
)
259 return TYPE_QUALS (t
);
262 /* lang_hooks.expr_size: Determine the size of the value of an expression T
263 in a language-specific way. Returns a tree for the size in bytes. */
266 lhd_expr_size (const_tree exp
)
269 && DECL_SIZE_UNIT (exp
) != 0)
270 return DECL_SIZE_UNIT (exp
);
272 return size_in_bytes (TREE_TYPE (exp
));
275 /* lang_hooks.gimplify_expr re-writes *EXPR_P into GIMPLE form. */
278 lhd_gimplify_expr (tree
*expr_p ATTRIBUTE_UNUSED
,
279 gimple_seq
*pre_p ATTRIBUTE_UNUSED
,
280 gimple_seq
*post_p ATTRIBUTE_UNUSED
)
285 /* lang_hooks.tree_size: Determine the size of a tree with code C,
286 which is a language-specific tree code in category tcc_constant or
287 tcc_exceptional. The default expects never to be called. */
289 lhd_tree_size (enum tree_code c ATTRIBUTE_UNUSED
)
294 /* Return true if decl, which is a function decl, may be called by a
298 lhd_decl_ok_for_sibcall (const_tree decl ATTRIBUTE_UNUSED
)
303 /* Return the COMDAT group into which DECL should be placed. */
306 lhd_comdat_group (tree decl
)
308 return IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl
));
311 /* lang_hooks.decls.final_write_globals: perform final processing on
314 write_global_declarations (void)
316 /* Really define vars that have had only a tentative definition.
317 Really output inline functions that must actually be callable
318 and have not been output so far. */
320 tree globals
= lang_hooks
.decls
.getdecls ();
321 int len
= list_length (globals
);
322 tree
*vec
= XNEWVEC (tree
, len
);
326 /* Process the decls in reverse order--earliest first.
327 Put them into VEC from back to front, then take out from front. */
329 for (i
= 0, decl
= globals
; i
< len
; i
++, decl
= TREE_CHAIN (decl
))
330 vec
[len
- i
- 1] = decl
;
332 wrapup_global_declarations (vec
, len
);
333 check_global_declarations (vec
, len
);
334 emit_debug_global_declarations (vec
, len
);
340 /* Called to perform language-specific initialization of CTX. */
342 lhd_initialize_diagnostics (struct diagnostic_context
*ctx ATTRIBUTE_UNUSED
)
346 /* The default function to print out name of current function that caused
349 lhd_print_error_function (diagnostic_context
*context
, const char *file
,
350 diagnostic_info
*diagnostic
)
352 if (diagnostic_last_function_changed (context
, diagnostic
))
354 const char *old_prefix
= context
->printer
->prefix
;
355 tree abstract_origin
= diagnostic
->abstract_origin
;
356 char *new_prefix
= (file
&& abstract_origin
== NULL
)
357 ? file_name_as_prefix (file
) : NULL
;
359 pp_set_prefix (context
->printer
, new_prefix
);
361 if (current_function_decl
== NULL
)
362 pp_printf (context
->printer
, _("At top level:"));
369 ao
= BLOCK_ABSTRACT_ORIGIN (abstract_origin
);
370 while (TREE_CODE (ao
) == BLOCK
371 && BLOCK_ABSTRACT_ORIGIN (ao
)
372 && BLOCK_ABSTRACT_ORIGIN (ao
) != ao
)
373 ao
= BLOCK_ABSTRACT_ORIGIN (ao
);
374 gcc_assert (TREE_CODE (ao
) == FUNCTION_DECL
);
378 fndecl
= current_function_decl
;
380 if (TREE_CODE (TREE_TYPE (fndecl
)) == METHOD_TYPE
)
382 (context
->printer
, _("In member function %qs"),
383 identifier_to_locale (lang_hooks
.decl_printable_name (fndecl
, 2)));
386 (context
->printer
, _("In function %qs"),
387 identifier_to_locale (lang_hooks
.decl_printable_name (fndecl
, 2)));
389 while (abstract_origin
)
392 tree block
= abstract_origin
;
394 locus
= &BLOCK_SOURCE_LOCATION (block
);
396 block
= BLOCK_SUPERCONTEXT (block
);
397 while (block
&& TREE_CODE (block
) == BLOCK
398 && BLOCK_ABSTRACT_ORIGIN (block
))
400 ao
= BLOCK_ABSTRACT_ORIGIN (block
);
402 while (TREE_CODE (ao
) == BLOCK
403 && BLOCK_ABSTRACT_ORIGIN (ao
)
404 && BLOCK_ABSTRACT_ORIGIN (ao
) != ao
)
405 ao
= BLOCK_ABSTRACT_ORIGIN (ao
);
407 if (TREE_CODE (ao
) == FUNCTION_DECL
)
412 else if (TREE_CODE (ao
) != BLOCK
)
415 block
= BLOCK_SUPERCONTEXT (block
);
418 abstract_origin
= block
;
421 while (block
&& TREE_CODE (block
) == BLOCK
)
422 block
= BLOCK_SUPERCONTEXT (block
);
424 if (block
&& TREE_CODE (block
) == FUNCTION_DECL
)
426 abstract_origin
= NULL
;
430 expanded_location s
= expand_location (*locus
);
431 pp_character (context
->printer
, ',');
432 pp_newline (context
->printer
);
435 if (flag_show_column
)
436 pp_printf (context
->printer
,
437 _(" inlined from %qs at %s:%d:%d"),
438 identifier_to_locale (lang_hooks
.decl_printable_name (fndecl
, 2)),
439 s
.file
, s
.line
, s
.column
);
441 pp_printf (context
->printer
,
442 _(" inlined from %qs at %s:%d"),
443 identifier_to_locale (lang_hooks
.decl_printable_name (fndecl
, 2)),
448 pp_printf (context
->printer
, _(" inlined from %qs"),
449 identifier_to_locale (lang_hooks
.decl_printable_name (fndecl
, 2)));
452 pp_character (context
->printer
, ':');
455 diagnostic_set_last_function (context
, diagnostic
);
456 pp_flush (context
->printer
);
457 context
->printer
->prefix
= old_prefix
;
458 free ((char*) new_prefix
);
463 lhd_callgraph_analyze_expr (tree
*tp ATTRIBUTE_UNUSED
,
464 int *walk_subtrees ATTRIBUTE_UNUSED
)
470 lhd_make_node (enum tree_code code
)
472 return make_node (code
);
476 lhd_to_target_charset (HOST_WIDE_INT c
)
482 lhd_expr_to_decl (tree expr
, bool *tc ATTRIBUTE_UNUSED
, bool *se ATTRIBUTE_UNUSED
)
487 /* Return sharing kind if OpenMP sharing attribute of DECL is
488 predetermined, OMP_CLAUSE_DEFAULT_UNSPECIFIED otherwise. */
490 enum omp_clause_default_kind
491 lhd_omp_predetermined_sharing (tree decl ATTRIBUTE_UNUSED
)
493 if (DECL_ARTIFICIAL (decl
))
494 return OMP_CLAUSE_DEFAULT_SHARED
;
495 return OMP_CLAUSE_DEFAULT_UNSPECIFIED
;
498 /* Generate code to copy SRC to DST. */
501 lhd_omp_assignment (tree clause ATTRIBUTE_UNUSED
, tree dst
, tree src
)
503 return build2 (MODIFY_EXPR
, TREE_TYPE (dst
), dst
, src
);
506 /* Register language specific type size variables as potentially OpenMP
507 firstprivate variables. */
510 lhd_omp_firstprivatize_type_sizes (struct gimplify_omp_ctx
*c ATTRIBUTE_UNUSED
,
511 tree t ATTRIBUTE_UNUSED
)
515 /* Common function for add_builtin_function and
516 add_builtin_function_ext_scope. */
518 add_builtin_function_common (const char *name
,
521 enum built_in_class cl
,
522 const char *library_name
,
526 tree id
= get_identifier (name
);
527 tree decl
= build_decl (BUILTINS_LOCATION
, FUNCTION_DECL
, id
, type
);
529 TREE_PUBLIC (decl
) = 1;
530 DECL_EXTERNAL (decl
) = 1;
531 DECL_BUILT_IN_CLASS (decl
) = cl
;
533 DECL_FUNCTION_CODE (decl
) = (enum built_in_function
) function_code
;
535 /* DECL_FUNCTION_CODE is a bitfield; verify that the value fits. */
536 gcc_assert (DECL_FUNCTION_CODE (decl
) == function_code
);
540 tree libname
= get_identifier (library_name
);
541 SET_DECL_ASSEMBLER_NAME (decl
, libname
);
544 /* Possibly apply some default attributes to this built-in function. */
546 decl_attributes (&decl
, attrs
, ATTR_FLAG_BUILT_IN
);
548 decl_attributes (&decl
, NULL_TREE
, 0);
554 /* Create a builtin function. */
557 add_builtin_function (const char *name
,
560 enum built_in_class cl
,
561 const char *library_name
,
564 return add_builtin_function_common (name
, type
, function_code
, cl
,
566 lang_hooks
.builtin_function
);
569 /* Like add_builtin_function, but make sure the scope is the external scope.
570 This is used to delay putting in back end builtin functions until the ISA
571 that defines the builtin is declared via function specific target options,
572 which can save memory for machines like the x86_64 that have multiple ISAs.
573 If this points to the same function as builtin_function, the backend must
574 add all of the builtins at program initialization time. */
577 add_builtin_function_ext_scope (const char *name
,
580 enum built_in_class cl
,
581 const char *library_name
,
584 return add_builtin_function_common (name
, type
, function_code
, cl
,
586 lang_hooks
.builtin_function_ext_scope
);
590 lhd_builtin_function (tree decl
)
592 lang_hooks
.decls
.pushdecl (decl
);