1 /* Default language-specific hooks.
2 Copyright 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010
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"
34 #include "langhooks.h"
36 #include "langhooks-def.h"
38 #include "diagnostic.h"
39 #include "tree-diagnostic.h"
44 /* Do nothing; in many cases the default hook. */
51 /* Do nothing (tree). */
54 lhd_do_nothing_t (tree
ARG_UNUSED (t
))
58 /* Pass through (tree). */
60 lhd_pass_through_t (tree t
)
65 /* Do nothing (int, int, int). Return NULL_TREE. */
68 lhd_do_nothing_iii_return_null_tree (int ARG_UNUSED (i
),
75 /* Do nothing (function). */
78 lhd_do_nothing_f (struct function
* ARG_UNUSED (f
))
82 /* Do nothing (return NULL_TREE). */
85 lhd_return_null_tree_v (void)
90 /* Do nothing (return NULL_TREE). */
93 lhd_return_null_tree (tree
ARG_UNUSED (t
))
98 /* Do nothing (return NULL_TREE). */
101 lhd_return_null_const_tree (const_tree
ARG_UNUSED (t
))
106 /* The default post options hook. */
109 lhd_post_options (const char ** ARG_UNUSED (pfilename
))
111 /* Excess precision other than "fast" requires front-end
113 flag_excess_precision_cmdline
= EXCESS_PRECISION_FAST
;
117 /* Called from by print-tree.c. */
120 lhd_print_tree_nothing (FILE * ARG_UNUSED (file
),
121 tree
ARG_UNUSED (node
),
122 int ARG_UNUSED (indent
))
126 /* Called from check_global_declarations. */
129 lhd_warn_unused_global_decl (const_tree decl
)
131 /* This is what used to exist in check_global_declarations. Probably
132 not many of these actually apply to non-C languages. */
134 if (TREE_CODE (decl
) == FUNCTION_DECL
&& DECL_DECLARED_INLINE_P (decl
))
136 if (TREE_CODE (decl
) == VAR_DECL
&& TREE_READONLY (decl
))
138 if (DECL_IN_SYSTEM_HEADER (decl
))
144 /* Set the DECL_ASSEMBLER_NAME for DECL. */
146 lhd_set_decl_assembler_name (tree decl
)
150 /* The language-independent code should never use the
151 DECL_ASSEMBLER_NAME for lots of DECLs. Only FUNCTION_DECLs and
152 VAR_DECLs for variables with static storage duration need a real
153 DECL_ASSEMBLER_NAME. */
154 gcc_assert (TREE_CODE (decl
) == FUNCTION_DECL
155 || (TREE_CODE (decl
) == VAR_DECL
156 && (TREE_STATIC (decl
)
157 || DECL_EXTERNAL (decl
)
158 || TREE_PUBLIC (decl
))));
160 /* By default, assume the name to use in assembly code is the same
161 as that used in the source language. (That's correct for C, and
162 GCC used to set DECL_ASSEMBLER_NAME to the same value as
163 DECL_NAME in build_decl, so this choice provides backwards
164 compatibility with existing front-ends. This assumption is wrapped
165 in a target hook, to allow for target-specific modification of the
168 Can't use just the variable's own name for a variable whose scope
169 is less than the whole compilation. Concatenate a distinguishing
170 number - we use the DECL_UID. */
172 if (TREE_PUBLIC (decl
) || DECL_FILE_SCOPE_P (decl
))
173 id
= targetm
.mangle_decl_assembler_name (decl
, DECL_NAME (decl
));
176 const char *name
= IDENTIFIER_POINTER (DECL_NAME (decl
));
179 ASM_FORMAT_PRIVATE_NAME (label
, name
, DECL_UID (decl
));
180 id
= get_identifier (label
);
182 SET_DECL_ASSEMBLER_NAME (decl
, id
);
186 /* Type promotion for variable arguments. */
188 lhd_type_promotes_to (tree
ARG_UNUSED (type
))
193 /* Registration of machine- or os-specific builtin types. */
195 lhd_register_builtin_type (tree
ARG_UNUSED (type
),
196 const char * ARG_UNUSED (name
))
200 /* Invalid use of an incomplete type. */
202 lhd_incomplete_type_error (const_tree
ARG_UNUSED (value
), const_tree type
)
204 gcc_assert (TREE_CODE (type
) == ERROR_MARK
);
208 /* Provide a default routine for alias sets that always returns -1. This
209 is used by languages that don't need to do anything special. */
212 lhd_get_alias_set (tree
ARG_UNUSED (t
))
217 /* This is the default decl_printable_name function. */
220 lhd_decl_printable_name (tree decl
, int ARG_UNUSED (verbosity
))
222 gcc_assert (decl
&& DECL_NAME (decl
));
223 return IDENTIFIER_POINTER (DECL_NAME (decl
));
226 /* This is the default dwarf_name function. */
229 lhd_dwarf_name (tree t
, int verbosity
)
231 gcc_assert (DECL_P (t
));
233 return lang_hooks
.decl_printable_name (t
, verbosity
);
236 /* This compares two types for equivalence ("compatible" in C-based languages).
237 This routine should only return 1 if it is sure. It should not be used
238 in contexts where erroneously returning 0 causes problems. */
241 lhd_types_compatible_p (tree x
, tree y
)
243 return TYPE_MAIN_VARIANT (x
) == TYPE_MAIN_VARIANT (y
);
246 /* lang_hooks.tree_dump.dump_tree: Dump language-specific parts of tree
247 nodes. Returns nonzero if it does not want the usual dumping of the
251 lhd_tree_dump_dump_tree (void *di ATTRIBUTE_UNUSED
, tree t ATTRIBUTE_UNUSED
)
256 /* lang_hooks.tree_dump.type_qual: Determine type qualifiers in a
257 language-specific way. */
260 lhd_tree_dump_type_quals (const_tree t
)
262 return TYPE_QUALS (t
);
265 /* lang_hooks.gimplify_expr re-writes *EXPR_P into GIMPLE form. */
268 lhd_gimplify_expr (tree
*expr_p ATTRIBUTE_UNUSED
,
269 gimple_seq
*pre_p ATTRIBUTE_UNUSED
,
270 gimple_seq
*post_p ATTRIBUTE_UNUSED
)
275 /* lang_hooks.tree_size: Determine the size of a tree with code C,
276 which is a language-specific tree code in category tcc_constant or
277 tcc_exceptional. The default expects never to be called. */
279 lhd_tree_size (enum tree_code c ATTRIBUTE_UNUSED
)
284 /* Return true if decl, which is a function decl, may be called by a
288 lhd_decl_ok_for_sibcall (const_tree decl ATTRIBUTE_UNUSED
)
293 /* lang_hooks.decls.final_write_globals: perform final processing on
296 write_global_declarations (void)
298 tree globals
, decl
, *vec
;
301 timevar_start (TV_PHASE_DEFERRED
);
302 /* Really define vars that have had only a tentative definition.
303 Really output inline functions that must actually be callable
304 and have not been output so far. */
306 globals
= lang_hooks
.decls
.getdecls ();
307 len
= list_length (globals
);
308 vec
= XNEWVEC (tree
, len
);
310 /* Process the decls in reverse order--earliest first.
311 Put them into VEC from back to front, then take out from front. */
313 for (i
= 0, decl
= globals
; i
< len
; i
++, decl
= DECL_CHAIN (decl
))
314 vec
[len
- i
- 1] = decl
;
316 wrapup_global_declarations (vec
, len
);
317 check_global_declarations (vec
, len
);
318 timevar_stop (TV_PHASE_DEFERRED
);
320 timevar_start (TV_PHASE_OPT_GEN
);
321 /* This lang hook is dual-purposed, and also finalizes the
323 finalize_compilation_unit ();
324 timevar_stop (TV_PHASE_OPT_GEN
);
326 timevar_start (TV_PHASE_DBGINFO
);
327 emit_debug_global_declarations (vec
, len
);
328 timevar_stop (TV_PHASE_DBGINFO
);
334 /* Called to perform language-specific initialization of CTX. */
336 lhd_initialize_diagnostics (diagnostic_context
*ctx ATTRIBUTE_UNUSED
)
340 /* Called to perform language-specific options initialization. */
342 lhd_init_options (unsigned int decoded_options_count ATTRIBUTE_UNUSED
,
343 struct cl_decoded_option
*decoded_options ATTRIBUTE_UNUSED
)
347 /* By default, always complain about options for the wrong language. */
349 lhd_complain_wrong_lang_p (const struct cl_option
*option ATTRIBUTE_UNUSED
)
354 /* By default, no language-specific options are valid. */
356 lhd_handle_option (size_t code ATTRIBUTE_UNUSED
,
357 const char *arg ATTRIBUTE_UNUSED
,
358 int value ATTRIBUTE_UNUSED
, int kind ATTRIBUTE_UNUSED
,
359 location_t loc ATTRIBUTE_UNUSED
,
360 const struct cl_option_handlers
*handlers ATTRIBUTE_UNUSED
)
365 /* The default function to print out name of current function that caused
368 lhd_print_error_function (diagnostic_context
*context
, const char *file
,
369 diagnostic_info
*diagnostic
)
371 if (diagnostic_last_function_changed (context
, diagnostic
))
373 const char *old_prefix
= context
->printer
->prefix
;
374 tree abstract_origin
= diagnostic_abstract_origin (diagnostic
);
375 char *new_prefix
= (file
&& abstract_origin
== NULL
)
376 ? file_name_as_prefix (file
) : NULL
;
378 pp_set_prefix (context
->printer
, new_prefix
);
380 if (current_function_decl
== NULL
)
381 pp_printf (context
->printer
, _("At top level:"));
388 ao
= BLOCK_ABSTRACT_ORIGIN (abstract_origin
);
389 while (TREE_CODE (ao
) == BLOCK
390 && BLOCK_ABSTRACT_ORIGIN (ao
)
391 && BLOCK_ABSTRACT_ORIGIN (ao
) != ao
)
392 ao
= BLOCK_ABSTRACT_ORIGIN (ao
);
393 gcc_assert (TREE_CODE (ao
) == FUNCTION_DECL
);
397 fndecl
= current_function_decl
;
399 if (TREE_CODE (TREE_TYPE (fndecl
)) == METHOD_TYPE
)
401 (context
->printer
, _("In member function %qs"),
402 identifier_to_locale (lang_hooks
.decl_printable_name (fndecl
, 2)));
405 (context
->printer
, _("In function %qs"),
406 identifier_to_locale (lang_hooks
.decl_printable_name (fndecl
, 2)));
408 while (abstract_origin
)
411 tree block
= abstract_origin
;
413 locus
= &BLOCK_SOURCE_LOCATION (block
);
415 block
= BLOCK_SUPERCONTEXT (block
);
416 while (block
&& TREE_CODE (block
) == BLOCK
417 && BLOCK_ABSTRACT_ORIGIN (block
))
419 ao
= BLOCK_ABSTRACT_ORIGIN (block
);
421 while (TREE_CODE (ao
) == BLOCK
422 && BLOCK_ABSTRACT_ORIGIN (ao
)
423 && BLOCK_ABSTRACT_ORIGIN (ao
) != ao
)
424 ao
= BLOCK_ABSTRACT_ORIGIN (ao
);
426 if (TREE_CODE (ao
) == FUNCTION_DECL
)
431 else if (TREE_CODE (ao
) != BLOCK
)
434 block
= BLOCK_SUPERCONTEXT (block
);
437 abstract_origin
= block
;
440 while (block
&& TREE_CODE (block
) == BLOCK
)
441 block
= BLOCK_SUPERCONTEXT (block
);
443 if (block
&& TREE_CODE (block
) == FUNCTION_DECL
)
445 abstract_origin
= NULL
;
449 expanded_location s
= expand_location (*locus
);
450 pp_character (context
->printer
, ',');
451 pp_newline (context
->printer
);
454 if (context
->show_column
)
455 pp_printf (context
->printer
,
456 _(" inlined from %qs at %s:%d:%d"),
457 identifier_to_locale (lang_hooks
.decl_printable_name (fndecl
, 2)),
458 s
.file
, s
.line
, s
.column
);
460 pp_printf (context
->printer
,
461 _(" inlined from %qs at %s:%d"),
462 identifier_to_locale (lang_hooks
.decl_printable_name (fndecl
, 2)),
467 pp_printf (context
->printer
, _(" inlined from %qs"),
468 identifier_to_locale (lang_hooks
.decl_printable_name (fndecl
, 2)));
471 pp_character (context
->printer
, ':');
474 diagnostic_set_last_function (context
, diagnostic
);
475 pp_newline_and_flush (context
->printer
);
476 context
->printer
->prefix
= old_prefix
;
477 free ((char*) new_prefix
);
482 lhd_make_node (enum tree_code code
)
484 return make_node (code
);
488 lhd_to_target_charset (HOST_WIDE_INT c
)
494 lhd_expr_to_decl (tree expr
, bool *tc ATTRIBUTE_UNUSED
, bool *se ATTRIBUTE_UNUSED
)
499 /* Return sharing kind if OpenMP sharing attribute of DECL is
500 predetermined, OMP_CLAUSE_DEFAULT_UNSPECIFIED otherwise. */
502 enum omp_clause_default_kind
503 lhd_omp_predetermined_sharing (tree decl ATTRIBUTE_UNUSED
)
505 if (DECL_ARTIFICIAL (decl
))
506 return OMP_CLAUSE_DEFAULT_SHARED
;
507 return OMP_CLAUSE_DEFAULT_UNSPECIFIED
;
510 /* Generate code to copy SRC to DST. */
513 lhd_omp_assignment (tree clause ATTRIBUTE_UNUSED
, tree dst
, tree src
)
515 return build2 (MODIFY_EXPR
, TREE_TYPE (dst
), dst
, src
);
518 /* Register language specific type size variables as potentially OpenMP
519 firstprivate variables. */
522 lhd_omp_firstprivatize_type_sizes (struct gimplify_omp_ctx
*c ATTRIBUTE_UNUSED
,
523 tree t ATTRIBUTE_UNUSED
)
527 /* Common function for add_builtin_function and
528 add_builtin_function_ext_scope. */
530 add_builtin_function_common (const char *name
,
533 enum built_in_class cl
,
534 const char *library_name
,
538 tree id
= get_identifier (name
);
539 tree decl
= build_decl (BUILTINS_LOCATION
, FUNCTION_DECL
, id
, type
);
541 TREE_PUBLIC (decl
) = 1;
542 DECL_EXTERNAL (decl
) = 1;
543 DECL_BUILT_IN_CLASS (decl
) = cl
;
545 DECL_FUNCTION_CODE (decl
) = (enum built_in_function
) function_code
;
547 /* DECL_FUNCTION_CODE is a bitfield; verify that the value fits. */
548 gcc_assert (DECL_FUNCTION_CODE (decl
) == function_code
);
552 tree libname
= get_identifier (library_name
);
553 SET_DECL_ASSEMBLER_NAME (decl
, libname
);
556 /* Possibly apply some default attributes to this built-in function. */
558 decl_attributes (&decl
, attrs
, ATTR_FLAG_BUILT_IN
);
560 decl_attributes (&decl
, NULL_TREE
, 0);
566 /* Create a builtin function. */
569 add_builtin_function (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
);
581 /* Like add_builtin_function, but make sure the scope is the external scope.
582 This is used to delay putting in back end builtin functions until the ISA
583 that defines the builtin is declared via function specific target options,
584 which can save memory for machines like the x86_64 that have multiple ISAs.
585 If this points to the same function as builtin_function, the backend must
586 add all of the builtins at program initialization time. */
589 add_builtin_function_ext_scope (const char *name
,
592 enum built_in_class cl
,
593 const char *library_name
,
596 return add_builtin_function_common (name
, type
, function_code
, cl
,
598 lang_hooks
.builtin_function_ext_scope
);
602 lhd_builtin_function (tree decl
)
604 lang_hooks
.decls
.pushdecl (decl
);
608 /* Create a builtin type. */
611 add_builtin_type (const char *name
, tree type
)
613 tree id
= get_identifier (name
);
614 tree decl
= build_decl (BUILTINS_LOCATION
, TYPE_DECL
, id
, type
);
615 return lang_hooks
.decls
.pushdecl (decl
);
620 /* Used to save and restore any previously active section. */
621 static section
*saved_section
;
624 /* Begin a new LTO output section named NAME. This default implementation
625 saves the old section and emits assembly code to switch to the new
629 lhd_begin_section (const char *name
)
633 /* Save the old section so we can restore it in lto_end_asm_section. */
634 gcc_assert (!saved_section
);
635 saved_section
= in_section
;
637 saved_section
= text_section
;
639 /* Create a new section and switch to it. */
640 section
= get_section (name
, SECTION_DEBUG
, NULL
);
641 switch_to_section (section
);
645 /* Write DATA of length LEN to the current LTO output section. This default
646 implementation just calls assemble_string and frees BLOCK. */
649 lhd_append_data (const void *data
, size_t len
, void *block
)
652 assemble_string ((const char *)data
, len
);
657 /* Finish the current LTO output section. This default implementation emits
658 assembly code to switch to any section previously saved by
659 lhd_begin_section. */
662 lhd_end_section (void)
666 switch_to_section (saved_section
);
667 saved_section
= NULL
;