1 /* Default language-specific hooks.
2 Copyright (C) 2001-2014 Free Software Foundation, Inc.
3 Contributed by Alexandre Oliva <aoliva@redhat.com>
5 This file is part of GCC.
7 GCC is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3, or (at your option)
12 GCC is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with GCC; see the file COPYING3. If not see
19 <http://www.gnu.org/licenses/>. */
23 #include "coretypes.h"
28 #include "stringpool.h"
30 #include "tree-inline.h"
33 #include "insn-config.h"
35 #include "langhooks.h"
37 #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
))
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 timevar_start (TV_PHASE_DEFERRED
);
344 /* Really define vars that have had only a tentative definition.
345 Really output inline functions that must actually be callable
346 and have not been output so far. */
348 globals
= lang_hooks
.decls
.getdecls ();
349 len
= list_length (globals
);
350 vec
= XNEWVEC (tree
, len
);
352 /* Process the decls in reverse order--earliest first.
353 Put them into VEC from back to front, then take out from front. */
355 for (i
= 0, decl
= globals
; i
< len
; i
++, decl
= DECL_CHAIN (decl
))
356 vec
[len
- i
- 1] = decl
;
358 wrapup_global_declarations (vec
, len
);
359 check_global_declarations (vec
, len
);
360 timevar_stop (TV_PHASE_DEFERRED
);
362 timevar_start (TV_PHASE_OPT_GEN
);
363 /* This lang hook is dual-purposed, and also finalizes the
365 finalize_compilation_unit ();
366 timevar_stop (TV_PHASE_OPT_GEN
);
368 timevar_start (TV_PHASE_DBGINFO
);
369 emit_debug_global_declarations (vec
, len
);
370 timevar_stop (TV_PHASE_DBGINFO
);
376 /* Called to perform language-specific initialization of CTX. */
378 lhd_initialize_diagnostics (diagnostic_context
*ctx ATTRIBUTE_UNUSED
)
382 /* Called to perform language-specific options initialization. */
384 lhd_init_options (unsigned int decoded_options_count ATTRIBUTE_UNUSED
,
385 struct cl_decoded_option
*decoded_options ATTRIBUTE_UNUSED
)
389 /* By default, always complain about options for the wrong language. */
391 lhd_complain_wrong_lang_p (const struct cl_option
*option ATTRIBUTE_UNUSED
)
396 /* By default, no language-specific options are valid. */
398 lhd_handle_option (size_t code ATTRIBUTE_UNUSED
,
399 const char *arg ATTRIBUTE_UNUSED
,
400 int value ATTRIBUTE_UNUSED
, int kind ATTRIBUTE_UNUSED
,
401 location_t loc ATTRIBUTE_UNUSED
,
402 const struct cl_option_handlers
*handlers ATTRIBUTE_UNUSED
)
407 /* The default function to print out name of current function that caused
410 lhd_print_error_function (diagnostic_context
*context
, const char *file
,
411 diagnostic_info
*diagnostic
)
413 if (diagnostic_last_function_changed (context
, diagnostic
))
415 const char *old_prefix
= context
->printer
->prefix
;
416 tree abstract_origin
= diagnostic_abstract_origin (diagnostic
);
417 char *new_prefix
= (file
&& abstract_origin
== NULL
)
418 ? file_name_as_prefix (context
, file
) : NULL
;
420 pp_set_prefix (context
->printer
, new_prefix
);
422 if (current_function_decl
== NULL
)
423 pp_printf (context
->printer
, _("At top level:"));
430 ao
= BLOCK_ABSTRACT_ORIGIN (abstract_origin
);
431 while (TREE_CODE (ao
) == BLOCK
432 && BLOCK_ABSTRACT_ORIGIN (ao
)
433 && BLOCK_ABSTRACT_ORIGIN (ao
) != ao
)
434 ao
= BLOCK_ABSTRACT_ORIGIN (ao
);
435 gcc_assert (TREE_CODE (ao
) == FUNCTION_DECL
);
439 fndecl
= current_function_decl
;
441 if (TREE_CODE (TREE_TYPE (fndecl
)) == METHOD_TYPE
)
443 (context
->printer
, _("In member function %qs"),
444 identifier_to_locale (lang_hooks
.decl_printable_name (fndecl
, 2)));
447 (context
->printer
, _("In function %qs"),
448 identifier_to_locale (lang_hooks
.decl_printable_name (fndecl
, 2)));
450 while (abstract_origin
)
453 tree block
= abstract_origin
;
455 locus
= &BLOCK_SOURCE_LOCATION (block
);
457 block
= BLOCK_SUPERCONTEXT (block
);
458 while (block
&& TREE_CODE (block
) == BLOCK
459 && BLOCK_ABSTRACT_ORIGIN (block
))
461 ao
= BLOCK_ABSTRACT_ORIGIN (block
);
463 while (TREE_CODE (ao
) == BLOCK
464 && BLOCK_ABSTRACT_ORIGIN (ao
)
465 && BLOCK_ABSTRACT_ORIGIN (ao
) != ao
)
466 ao
= BLOCK_ABSTRACT_ORIGIN (ao
);
468 if (TREE_CODE (ao
) == FUNCTION_DECL
)
473 else if (TREE_CODE (ao
) != BLOCK
)
476 block
= BLOCK_SUPERCONTEXT (block
);
479 abstract_origin
= block
;
482 while (block
&& TREE_CODE (block
) == BLOCK
)
483 block
= BLOCK_SUPERCONTEXT (block
);
485 if (block
&& TREE_CODE (block
) == FUNCTION_DECL
)
487 abstract_origin
= NULL
;
491 expanded_location s
= expand_location (*locus
);
492 pp_comma (context
->printer
);
493 pp_newline (context
->printer
);
496 if (context
->show_column
)
497 pp_printf (context
->printer
,
498 _(" inlined from %qs at %r%s:%d:%d%R"),
499 identifier_to_locale (lang_hooks
.decl_printable_name (fndecl
, 2)),
500 "locus", s
.file
, s
.line
, s
.column
);
502 pp_printf (context
->printer
,
503 _(" inlined from %qs at %r%s:%d%R"),
504 identifier_to_locale (lang_hooks
.decl_printable_name (fndecl
, 2)),
505 "locus", s
.file
, s
.line
);
509 pp_printf (context
->printer
, _(" inlined from %qs"),
510 identifier_to_locale (lang_hooks
.decl_printable_name (fndecl
, 2)));
513 pp_colon (context
->printer
);
516 diagnostic_set_last_function (context
, diagnostic
);
517 pp_newline_and_flush (context
->printer
);
518 context
->printer
->prefix
= old_prefix
;
519 free ((char*) new_prefix
);
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 /* Finalize clause C. */
563 lhd_omp_finish_clause (tree
, gimple_seq
*)
567 /* Register language specific type size variables as potentially OpenMP
568 firstprivate variables. */
571 lhd_omp_firstprivatize_type_sizes (struct gimplify_omp_ctx
*c ATTRIBUTE_UNUSED
,
572 tree t ATTRIBUTE_UNUSED
)
576 /* Return true if TYPE is an OpenMP mappable type. */
579 lhd_omp_mappable_type (tree type
)
581 /* Mappable type has to be complete. */
582 if (type
== error_mark_node
|| !COMPLETE_TYPE_P (type
))
587 /* Common function for add_builtin_function and
588 add_builtin_function_ext_scope. */
590 add_builtin_function_common (const char *name
,
593 enum built_in_class cl
,
594 const char *library_name
,
598 tree id
= get_identifier (name
);
599 tree decl
= build_decl (BUILTINS_LOCATION
, FUNCTION_DECL
, id
, type
);
601 TREE_PUBLIC (decl
) = 1;
602 DECL_EXTERNAL (decl
) = 1;
603 DECL_BUILT_IN_CLASS (decl
) = cl
;
605 DECL_FUNCTION_CODE (decl
) = (enum built_in_function
) function_code
;
607 /* DECL_FUNCTION_CODE is a bitfield; verify that the value fits. */
608 gcc_assert (DECL_FUNCTION_CODE (decl
) == function_code
);
612 tree libname
= get_identifier (library_name
);
613 SET_DECL_ASSEMBLER_NAME (decl
, libname
);
616 /* Possibly apply some default attributes to this built-in function. */
618 decl_attributes (&decl
, attrs
, ATTR_FLAG_BUILT_IN
);
620 decl_attributes (&decl
, NULL_TREE
, 0);
626 /* Create a builtin function. */
629 add_builtin_function (const char *name
,
632 enum built_in_class cl
,
633 const char *library_name
,
636 return add_builtin_function_common (name
, type
, function_code
, cl
,
638 lang_hooks
.builtin_function
);
641 /* Like add_builtin_function, but make sure the scope is the external scope.
642 This is used to delay putting in back end builtin functions until the ISA
643 that defines the builtin is declared via function specific target options,
644 which can save memory for machines like the x86_64 that have multiple ISAs.
645 If this points to the same function as builtin_function, the backend must
646 add all of the builtins at program initialization time. */
649 add_builtin_function_ext_scope (const char *name
,
652 enum built_in_class cl
,
653 const char *library_name
,
656 return add_builtin_function_common (name
, type
, function_code
, cl
,
658 lang_hooks
.builtin_function_ext_scope
);
662 lhd_builtin_function (tree decl
)
664 lang_hooks
.decls
.pushdecl (decl
);
669 lhd_user_conv_function_p (tree decl ATTRIBUTE_UNUSED
)
674 /* Create a builtin type. */
677 add_builtin_type (const char *name
, tree type
)
679 tree id
= get_identifier (name
);
680 tree decl
= build_decl (BUILTINS_LOCATION
, TYPE_DECL
, id
, type
);
681 return lang_hooks
.decls
.pushdecl (decl
);
686 /* Used to save and restore any previously active section. */
687 static section
*saved_section
;
690 /* Begin a new LTO output section named NAME. This default implementation
691 saves the old section and emits assembly code to switch to the new
695 lhd_begin_section (const char *name
)
699 /* Save the old section so we can restore it in lto_end_asm_section. */
700 gcc_assert (!saved_section
);
701 saved_section
= in_section
;
703 saved_section
= text_section
;
705 /* Create a new section and switch to it. */
706 section
= get_section (name
, SECTION_DEBUG
, NULL
);
707 switch_to_section (section
);
711 /* Write DATA of length LEN to the current LTO output section. This default
712 implementation just calls assemble_string and frees BLOCK. */
715 lhd_append_data (const void *data
, size_t len
, void *block
)
718 assemble_string ((const char *)data
, len
);
723 /* Finish the current LTO output section. This default implementation emits
724 assembly code to switch to any section previously saved by
725 lhd_begin_section. */
728 lhd_end_section (void)
732 switch_to_section (saved_section
);
733 saved_section
= NULL
;