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"
33 #include "integrate.h"
35 #include "langhooks.h"
37 #include "langhooks-def.h"
39 #include "diagnostic.h"
40 #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
))
107 lhd_do_nothing_u (unsigned ARG_UNUSED (t
))
112 lhd_do_nothing_t_return_int (tree
ARG_UNUSED (t
))
118 lhd_do_nothing_t_return_bool (tree
ARG_UNUSED (t
))
125 lhd_do_nothing_t_t (tree
ARG_UNUSED (t
), tree
ARG_UNUSED (t2
))
130 lhd_do_nothing_t_t_return_int (tree
ARG_UNUSED (t
), tree
ARG_UNUSED (t2
))
136 lhd_do_nothing_t_vp_return_bool (tree
ARG_UNUSED (t
), void * ARG_UNUSED (t2
))
141 /* Do nothing (tree, tree). Return NULL_TREE. */
143 lhd_do_nothing_t_t_return_null_tree (tree
ARG_UNUSED (t
), tree
ARG_UNUSED (t2
))
148 /* The default post options hook. */
151 lhd_post_options (const char ** ARG_UNUSED (pfilename
))
153 /* Excess precision other than "fast" requires front-end
155 flag_excess_precision_cmdline
= EXCESS_PRECISION_FAST
;
159 /* Called from by print-tree.c. */
162 lhd_print_tree_nothing (FILE * ARG_UNUSED (file
),
163 tree
ARG_UNUSED (node
),
164 int ARG_UNUSED (indent
))
168 /* Called from check_global_declarations. */
171 lhd_warn_unused_global_decl (const_tree decl
)
173 /* This is what used to exist in check_global_declarations. Probably
174 not many of these actually apply to non-C languages. */
176 if (TREE_CODE (decl
) == FUNCTION_DECL
&& DECL_DECLARED_INLINE_P (decl
))
178 if (TREE_CODE (decl
) == VAR_DECL
&& TREE_READONLY (decl
))
180 if (DECL_IN_SYSTEM_HEADER (decl
))
186 /* Set the DECL_ASSEMBLER_NAME for DECL. */
188 lhd_set_decl_assembler_name (tree decl
)
192 /* The language-independent code should never use the
193 DECL_ASSEMBLER_NAME for lots of DECLs. Only FUNCTION_DECLs and
194 VAR_DECLs for variables with static storage duration need a real
195 DECL_ASSEMBLER_NAME. */
196 gcc_assert (TREE_CODE (decl
) == FUNCTION_DECL
197 || (TREE_CODE (decl
) == VAR_DECL
198 && (TREE_STATIC (decl
)
199 || DECL_EXTERNAL (decl
)
200 || TREE_PUBLIC (decl
))));
202 /* By default, assume the name to use in assembly code is the same
203 as that used in the source language. (That's correct for C, and
204 GCC used to set DECL_ASSEMBLER_NAME to the same value as
205 DECL_NAME in build_decl, so this choice provides backwards
206 compatibility with existing front-ends. This assumption is wrapped
207 in a target hook, to allow for target-specific modification of the
210 Can't use just the variable's own name for a variable whose scope
211 is less than the whole compilation. Concatenate a distinguishing
212 number - we use the DECL_UID. */
214 if (TREE_PUBLIC (decl
) || DECL_FILE_SCOPE_P (decl
))
215 id
= targetm
.mangle_decl_assembler_name (decl
, DECL_NAME (decl
));
218 const char *name
= IDENTIFIER_POINTER (DECL_NAME (decl
));
221 ASM_FORMAT_PRIVATE_NAME (label
, name
, DECL_UID (decl
));
222 id
= get_identifier (label
);
224 SET_DECL_ASSEMBLER_NAME (decl
, id
);
228 /* Type promotion for variable arguments. */
230 lhd_type_promotes_to (tree
ARG_UNUSED (type
))
235 /* Registration of machine- or os-specific builtin types. */
237 lhd_register_builtin_type (tree
ARG_UNUSED (type
),
238 const char * ARG_UNUSED (name
))
242 /* Invalid use of an incomplete type. */
244 lhd_incomplete_type_error (const_tree
ARG_UNUSED (value
), const_tree type
)
246 gcc_assert (TREE_CODE (type
) == ERROR_MARK
);
250 /* Provide a default routine for alias sets that always returns -1. This
251 is used by languages that don't need to do anything special. */
254 lhd_get_alias_set (tree
ARG_UNUSED (t
))
259 /* This is the default decl_printable_name function. */
262 lhd_decl_printable_name (tree decl
, int ARG_UNUSED (verbosity
))
264 gcc_assert (decl
&& DECL_NAME (decl
));
265 return IDENTIFIER_POINTER (DECL_NAME (decl
));
268 /* This is the default dwarf_name function. */
271 lhd_dwarf_name (tree t
, int verbosity
)
273 gcc_assert (DECL_P (t
));
275 return lang_hooks
.decl_printable_name (t
, verbosity
);
278 /* This compares two types for equivalence ("compatible" in C-based languages).
279 This routine should only return 1 if it is sure. It should not be used
280 in contexts where erroneously returning 0 causes problems. */
283 lhd_types_compatible_p (tree x
, tree y
)
285 return TYPE_MAIN_VARIANT (x
) == TYPE_MAIN_VARIANT (y
);
288 /* lang_hooks.tree_dump.dump_tree: Dump language-specific parts of tree
289 nodes. Returns nonzero if it does not want the usual dumping of the
293 lhd_tree_dump_dump_tree (void *di ATTRIBUTE_UNUSED
, tree t ATTRIBUTE_UNUSED
)
298 /* lang_hooks.tree_dump.type_qual: Determine type qualifiers in a
299 language-specific way. */
302 lhd_tree_dump_type_quals (const_tree t
)
304 return TYPE_QUALS (t
);
307 /* lang_hooks.gimplify_expr re-writes *EXPR_P into GIMPLE form. */
310 lhd_gimplify_expr (tree
*expr_p ATTRIBUTE_UNUSED
,
311 gimple_seq
*pre_p ATTRIBUTE_UNUSED
,
312 gimple_seq
*post_p ATTRIBUTE_UNUSED
)
317 /* lang_hooks.tree_size: Determine the size of a tree with code C,
318 which is a language-specific tree code in category tcc_constant or
319 tcc_exceptional. The default expects never to be called. */
321 lhd_tree_size (enum tree_code c ATTRIBUTE_UNUSED
)
326 /* Return true if decl, which is a function decl, may be called by a
330 lhd_decl_ok_for_sibcall (const_tree decl ATTRIBUTE_UNUSED
)
335 /* lang_hooks.decls.final_write_globals: perform final processing on
338 write_global_declarations (void)
340 tree globals
, decl
, *vec
;
343 /* This lang hook is dual-purposed, and also finalizes the
345 cgraph_finalize_compilation_unit ();
347 /* Really define vars that have had only a tentative definition.
348 Really output inline functions that must actually be callable
349 and have not been output so far. */
351 globals
= lang_hooks
.decls
.getdecls ();
352 len
= list_length (globals
);
353 vec
= XNEWVEC (tree
, len
);
355 /* Process the decls in reverse order--earliest first.
356 Put them into VEC from back to front, then take out from front. */
358 for (i
= 0, decl
= globals
; i
< len
; i
++, decl
= DECL_CHAIN (decl
))
359 vec
[len
- i
- 1] = decl
;
361 wrapup_global_declarations (vec
, len
);
362 check_global_declarations (vec
, len
);
363 emit_debug_global_declarations (vec
, len
);
369 /* Called to perform language-specific initialization of CTX. */
371 lhd_initialize_diagnostics (diagnostic_context
*ctx ATTRIBUTE_UNUSED
)
375 /* Called to perform language-specific options initialization. */
377 lhd_init_options (unsigned int decoded_options_count ATTRIBUTE_UNUSED
,
378 struct cl_decoded_option
*decoded_options ATTRIBUTE_UNUSED
)
382 /* By default, always complain about options for the wrong language. */
384 lhd_complain_wrong_lang_p (const struct cl_option
*option ATTRIBUTE_UNUSED
)
389 /* By default, no language-specific options are valid. */
391 lhd_handle_option (size_t code ATTRIBUTE_UNUSED
,
392 const char *arg ATTRIBUTE_UNUSED
,
393 int value ATTRIBUTE_UNUSED
, int kind ATTRIBUTE_UNUSED
,
394 location_t loc ATTRIBUTE_UNUSED
,
395 const struct cl_option_handlers
*handlers ATTRIBUTE_UNUSED
)
400 /* The default function to print out name of current function that caused
403 lhd_print_error_function (diagnostic_context
*context
, const char *file
,
404 diagnostic_info
*diagnostic
)
406 if (diagnostic_last_function_changed (context
, diagnostic
))
408 const char *old_prefix
= context
->printer
->prefix
;
409 tree abstract_origin
= diagnostic_abstract_origin (diagnostic
);
410 char *new_prefix
= (file
&& abstract_origin
== NULL
)
411 ? file_name_as_prefix (file
) : NULL
;
413 pp_set_prefix (context
->printer
, new_prefix
);
415 if (current_function_decl
== NULL
)
416 pp_printf (context
->printer
, _("At top level:"));
423 ao
= BLOCK_ABSTRACT_ORIGIN (abstract_origin
);
424 while (TREE_CODE (ao
) == BLOCK
425 && BLOCK_ABSTRACT_ORIGIN (ao
)
426 && BLOCK_ABSTRACT_ORIGIN (ao
) != ao
)
427 ao
= BLOCK_ABSTRACT_ORIGIN (ao
);
428 gcc_assert (TREE_CODE (ao
) == FUNCTION_DECL
);
432 fndecl
= current_function_decl
;
434 if (TREE_CODE (TREE_TYPE (fndecl
)) == METHOD_TYPE
)
436 (context
->printer
, _("In member function %qs"),
437 identifier_to_locale (lang_hooks
.decl_printable_name (fndecl
, 2)));
440 (context
->printer
, _("In function %qs"),
441 identifier_to_locale (lang_hooks
.decl_printable_name (fndecl
, 2)));
443 while (abstract_origin
)
446 tree block
= abstract_origin
;
448 locus
= &BLOCK_SOURCE_LOCATION (block
);
450 block
= BLOCK_SUPERCONTEXT (block
);
451 while (block
&& TREE_CODE (block
) == BLOCK
452 && BLOCK_ABSTRACT_ORIGIN (block
))
454 ao
= BLOCK_ABSTRACT_ORIGIN (block
);
456 while (TREE_CODE (ao
) == BLOCK
457 && BLOCK_ABSTRACT_ORIGIN (ao
)
458 && BLOCK_ABSTRACT_ORIGIN (ao
) != ao
)
459 ao
= BLOCK_ABSTRACT_ORIGIN (ao
);
461 if (TREE_CODE (ao
) == FUNCTION_DECL
)
466 else if (TREE_CODE (ao
) != BLOCK
)
469 block
= BLOCK_SUPERCONTEXT (block
);
472 abstract_origin
= block
;
475 while (block
&& TREE_CODE (block
) == BLOCK
)
476 block
= BLOCK_SUPERCONTEXT (block
);
478 if (block
&& TREE_CODE (block
) == FUNCTION_DECL
)
480 abstract_origin
= NULL
;
484 expanded_location s
= expand_location (*locus
);
485 pp_character (context
->printer
, ',');
486 pp_newline (context
->printer
);
489 if (context
->show_column
)
490 pp_printf (context
->printer
,
491 _(" inlined from %qs at %s:%d:%d"),
492 identifier_to_locale (lang_hooks
.decl_printable_name (fndecl
, 2)),
493 s
.file
, s
.line
, s
.column
);
495 pp_printf (context
->printer
,
496 _(" inlined from %qs at %s:%d"),
497 identifier_to_locale (lang_hooks
.decl_printable_name (fndecl
, 2)),
502 pp_printf (context
->printer
, _(" inlined from %qs"),
503 identifier_to_locale (lang_hooks
.decl_printable_name (fndecl
, 2)));
506 pp_character (context
->printer
, ':');
509 diagnostic_set_last_function (context
, diagnostic
);
510 pp_flush (context
->printer
);
511 context
->printer
->prefix
= old_prefix
;
512 free ((char*) new_prefix
);
517 lhd_callgraph_analyze_expr (tree
*tp ATTRIBUTE_UNUSED
,
518 int *walk_subtrees ATTRIBUTE_UNUSED
)
524 lhd_make_node (enum tree_code code
)
526 return make_node (code
);
530 lhd_to_target_charset (HOST_WIDE_INT c
)
536 lhd_expr_to_decl (tree expr
, bool *tc ATTRIBUTE_UNUSED
, bool *se ATTRIBUTE_UNUSED
)
541 /* Return sharing kind if OpenMP sharing attribute of DECL is
542 predetermined, OMP_CLAUSE_DEFAULT_UNSPECIFIED otherwise. */
544 enum omp_clause_default_kind
545 lhd_omp_predetermined_sharing (tree decl ATTRIBUTE_UNUSED
)
547 if (DECL_ARTIFICIAL (decl
))
548 return OMP_CLAUSE_DEFAULT_SHARED
;
549 return OMP_CLAUSE_DEFAULT_UNSPECIFIED
;
552 /* Generate code to copy SRC to DST. */
555 lhd_omp_assignment (tree clause ATTRIBUTE_UNUSED
, tree dst
, tree src
)
557 return build2 (MODIFY_EXPR
, TREE_TYPE (dst
), dst
, src
);
560 /* Register language specific type size variables as potentially OpenMP
561 firstprivate variables. */
564 lhd_omp_firstprivatize_type_sizes (struct gimplify_omp_ctx
*c ATTRIBUTE_UNUSED
,
565 tree t ATTRIBUTE_UNUSED
)
569 /* Common function for add_builtin_function and
570 add_builtin_function_ext_scope. */
572 add_builtin_function_common (const char *name
,
575 enum built_in_class cl
,
576 const char *library_name
,
580 tree id
= get_identifier (name
);
581 tree decl
= build_decl (BUILTINS_LOCATION
, FUNCTION_DECL
, id
, type
);
583 TREE_PUBLIC (decl
) = 1;
584 DECL_EXTERNAL (decl
) = 1;
585 DECL_BUILT_IN_CLASS (decl
) = cl
;
587 DECL_FUNCTION_CODE (decl
) = (enum built_in_function
) function_code
;
589 /* DECL_FUNCTION_CODE is a bitfield; verify that the value fits. */
590 gcc_assert (DECL_FUNCTION_CODE (decl
) == function_code
);
594 tree libname
= get_identifier (library_name
);
595 SET_DECL_ASSEMBLER_NAME (decl
, libname
);
598 /* Possibly apply some default attributes to this built-in function. */
600 decl_attributes (&decl
, attrs
, ATTR_FLAG_BUILT_IN
);
602 decl_attributes (&decl
, NULL_TREE
, 0);
608 /* Create a builtin function. */
611 add_builtin_function (const char *name
,
614 enum built_in_class cl
,
615 const char *library_name
,
618 return add_builtin_function_common (name
, type
, function_code
, cl
,
620 lang_hooks
.builtin_function
);
623 /* Like add_builtin_function, but make sure the scope is the external scope.
624 This is used to delay putting in back end builtin functions until the ISA
625 that defines the builtin is declared via function specific target options,
626 which can save memory for machines like the x86_64 that have multiple ISAs.
627 If this points to the same function as builtin_function, the backend must
628 add all of the builtins at program initialization time. */
631 add_builtin_function_ext_scope (const char *name
,
634 enum built_in_class cl
,
635 const char *library_name
,
638 return add_builtin_function_common (name
, type
, function_code
, cl
,
640 lang_hooks
.builtin_function_ext_scope
);
644 lhd_builtin_function (tree decl
)
646 lang_hooks
.decls
.pushdecl (decl
);
651 lhd_user_conv_function_p (tree decl ATTRIBUTE_UNUSED
)
658 /* Used to save and restore any previously active section. */
659 static section
*saved_section
;
662 /* Begin a new LTO output section named NAME. This default implementation
663 saves the old section and emits assembly code to switch to the new
667 lhd_begin_section (const char *name
)
671 /* Save the old section so we can restore it in lto_end_asm_section. */
672 gcc_assert (!saved_section
);
673 saved_section
= in_section
;
675 saved_section
= text_section
;
677 /* Create a new section and switch to it. */
678 section
= get_section (name
, SECTION_DEBUG
, NULL
);
679 switch_to_section (section
);
683 /* Write DATA of length LEN to the current LTO output section. This default
684 implementation just calls assemble_string and frees BLOCK. */
687 lhd_append_data (const void *data
, size_t len
, void *block
)
690 assemble_string ((const char *)data
, len
);
695 /* Finish the current LTO output section. This default implementation emits
696 assembly code to switch to any section previously saved by
697 lhd_begin_section. */
700 lhd_end_section (void)
704 switch_to_section (saved_section
);
705 saved_section
= NULL
;