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.expr_size: Determine the size of the value of an expression T
264 in a language-specific way. Returns a tree for the size in bytes. */
267 lhd_expr_size (const_tree exp
)
270 && DECL_SIZE_UNIT (exp
) != 0)
271 return DECL_SIZE_UNIT (exp
);
273 return size_in_bytes (TREE_TYPE (exp
));
276 /* lang_hooks.gimplify_expr re-writes *EXPR_P into GIMPLE form. */
279 lhd_gimplify_expr (tree
*expr_p ATTRIBUTE_UNUSED
,
280 gimple_seq
*pre_p ATTRIBUTE_UNUSED
,
281 gimple_seq
*post_p ATTRIBUTE_UNUSED
)
286 /* lang_hooks.tree_size: Determine the size of a tree with code C,
287 which is a language-specific tree code in category tcc_constant or
288 tcc_exceptional. The default expects never to be called. */
290 lhd_tree_size (enum tree_code c ATTRIBUTE_UNUSED
)
295 /* Return true if decl, which is a function decl, may be called by a
299 lhd_decl_ok_for_sibcall (const_tree decl ATTRIBUTE_UNUSED
)
304 /* lang_hooks.decls.final_write_globals: perform final processing on
307 write_global_declarations (void)
309 tree globals
, decl
, *vec
;
312 /* This lang hook is dual-purposed, and also finalizes the
314 cgraph_finalize_compilation_unit ();
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 globals
= lang_hooks
.decls
.getdecls ();
321 len
= list_length (globals
);
322 vec
= XNEWVEC (tree
, len
);
324 /* Process the decls in reverse order--earliest first.
325 Put them into VEC from back to front, then take out from front. */
327 for (i
= 0, decl
= globals
; i
< len
; i
++, decl
= TREE_CHAIN (decl
))
328 vec
[len
- i
- 1] = decl
;
330 wrapup_global_declarations (vec
, len
);
331 check_global_declarations (vec
, len
);
332 emit_debug_global_declarations (vec
, len
);
338 /* Called to perform language-specific initialization of CTX. */
340 lhd_initialize_diagnostics (struct diagnostic_context
*ctx ATTRIBUTE_UNUSED
)
344 /* The default function to print out name of current function that caused
347 lhd_print_error_function (diagnostic_context
*context
, const char *file
,
348 diagnostic_info
*diagnostic
)
350 if (diagnostic_last_function_changed (context
, diagnostic
))
352 const char *old_prefix
= context
->printer
->prefix
;
353 tree abstract_origin
= diagnostic
->abstract_origin
;
354 char *new_prefix
= (file
&& abstract_origin
== NULL
)
355 ? file_name_as_prefix (file
) : NULL
;
357 pp_set_prefix (context
->printer
, new_prefix
);
359 if (current_function_decl
== NULL
)
360 pp_printf (context
->printer
, _("At top level:"));
367 ao
= BLOCK_ABSTRACT_ORIGIN (abstract_origin
);
368 while (TREE_CODE (ao
) == BLOCK
369 && BLOCK_ABSTRACT_ORIGIN (ao
)
370 && BLOCK_ABSTRACT_ORIGIN (ao
) != ao
)
371 ao
= BLOCK_ABSTRACT_ORIGIN (ao
);
372 gcc_assert (TREE_CODE (ao
) == FUNCTION_DECL
);
376 fndecl
= current_function_decl
;
378 if (TREE_CODE (TREE_TYPE (fndecl
)) == METHOD_TYPE
)
380 (context
->printer
, _("In member function %qs"),
381 identifier_to_locale (lang_hooks
.decl_printable_name (fndecl
, 2)));
384 (context
->printer
, _("In function %qs"),
385 identifier_to_locale (lang_hooks
.decl_printable_name (fndecl
, 2)));
387 while (abstract_origin
)
390 tree block
= abstract_origin
;
392 locus
= &BLOCK_SOURCE_LOCATION (block
);
394 block
= BLOCK_SUPERCONTEXT (block
);
395 while (block
&& TREE_CODE (block
) == BLOCK
396 && BLOCK_ABSTRACT_ORIGIN (block
))
398 ao
= BLOCK_ABSTRACT_ORIGIN (block
);
400 while (TREE_CODE (ao
) == BLOCK
401 && BLOCK_ABSTRACT_ORIGIN (ao
)
402 && BLOCK_ABSTRACT_ORIGIN (ao
) != ao
)
403 ao
= BLOCK_ABSTRACT_ORIGIN (ao
);
405 if (TREE_CODE (ao
) == FUNCTION_DECL
)
410 else if (TREE_CODE (ao
) != BLOCK
)
413 block
= BLOCK_SUPERCONTEXT (block
);
416 abstract_origin
= block
;
419 while (block
&& TREE_CODE (block
) == BLOCK
)
420 block
= BLOCK_SUPERCONTEXT (block
);
422 if (block
&& TREE_CODE (block
) == FUNCTION_DECL
)
424 abstract_origin
= NULL
;
428 expanded_location s
= expand_location (*locus
);
429 pp_character (context
->printer
, ',');
430 pp_newline (context
->printer
);
433 if (flag_show_column
)
434 pp_printf (context
->printer
,
435 _(" inlined from %qs at %s:%d:%d"),
436 identifier_to_locale (lang_hooks
.decl_printable_name (fndecl
, 2)),
437 s
.file
, s
.line
, s
.column
);
439 pp_printf (context
->printer
,
440 _(" inlined from %qs at %s:%d"),
441 identifier_to_locale (lang_hooks
.decl_printable_name (fndecl
, 2)),
446 pp_printf (context
->printer
, _(" inlined from %qs"),
447 identifier_to_locale (lang_hooks
.decl_printable_name (fndecl
, 2)));
450 pp_character (context
->printer
, ':');
453 diagnostic_set_last_function (context
, diagnostic
);
454 pp_flush (context
->printer
);
455 context
->printer
->prefix
= old_prefix
;
456 free ((char*) new_prefix
);
461 lhd_callgraph_analyze_expr (tree
*tp ATTRIBUTE_UNUSED
,
462 int *walk_subtrees ATTRIBUTE_UNUSED
)
468 lhd_make_node (enum tree_code code
)
470 return make_node (code
);
474 lhd_to_target_charset (HOST_WIDE_INT c
)
480 lhd_expr_to_decl (tree expr
, bool *tc ATTRIBUTE_UNUSED
, bool *se ATTRIBUTE_UNUSED
)
485 /* Return sharing kind if OpenMP sharing attribute of DECL is
486 predetermined, OMP_CLAUSE_DEFAULT_UNSPECIFIED otherwise. */
488 enum omp_clause_default_kind
489 lhd_omp_predetermined_sharing (tree decl ATTRIBUTE_UNUSED
)
491 if (DECL_ARTIFICIAL (decl
))
492 return OMP_CLAUSE_DEFAULT_SHARED
;
493 return OMP_CLAUSE_DEFAULT_UNSPECIFIED
;
496 /* Generate code to copy SRC to DST. */
499 lhd_omp_assignment (tree clause ATTRIBUTE_UNUSED
, tree dst
, tree src
)
501 return build2 (MODIFY_EXPR
, TREE_TYPE (dst
), dst
, src
);
504 /* Register language specific type size variables as potentially OpenMP
505 firstprivate variables. */
508 lhd_omp_firstprivatize_type_sizes (struct gimplify_omp_ctx
*c ATTRIBUTE_UNUSED
,
509 tree t ATTRIBUTE_UNUSED
)
513 /* Common function for add_builtin_function and
514 add_builtin_function_ext_scope. */
516 add_builtin_function_common (const char *name
,
519 enum built_in_class cl
,
520 const char *library_name
,
524 tree id
= get_identifier (name
);
525 tree decl
= build_decl (BUILTINS_LOCATION
, FUNCTION_DECL
, id
, type
);
527 TREE_PUBLIC (decl
) = 1;
528 DECL_EXTERNAL (decl
) = 1;
529 DECL_BUILT_IN_CLASS (decl
) = cl
;
531 DECL_FUNCTION_CODE (decl
) = (enum built_in_function
) function_code
;
533 /* DECL_FUNCTION_CODE is a bitfield; verify that the value fits. */
534 gcc_assert (DECL_FUNCTION_CODE (decl
) == function_code
);
538 tree libname
= get_identifier (library_name
);
539 SET_DECL_ASSEMBLER_NAME (decl
, libname
);
542 /* Possibly apply some default attributes to this built-in function. */
544 decl_attributes (&decl
, attrs
, ATTR_FLAG_BUILT_IN
);
546 decl_attributes (&decl
, NULL_TREE
, 0);
552 /* Create a builtin function. */
555 add_builtin_function (const char *name
,
558 enum built_in_class cl
,
559 const char *library_name
,
562 return add_builtin_function_common (name
, type
, function_code
, cl
,
564 lang_hooks
.builtin_function
);
567 /* Like add_builtin_function, but make sure the scope is the external scope.
568 This is used to delay putting in back end builtin functions until the ISA
569 that defines the builtin is declared via function specific target options,
570 which can save memory for machines like the x86_64 that have multiple ISAs.
571 If this points to the same function as builtin_function, the backend must
572 add all of the builtins at program initialization time. */
575 add_builtin_function_ext_scope (const char *name
,
578 enum built_in_class cl
,
579 const char *library_name
,
582 return add_builtin_function_common (name
, type
, function_code
, cl
,
584 lang_hooks
.builtin_function_ext_scope
);
588 lhd_builtin_function (tree decl
)
590 lang_hooks
.decls
.pushdecl (decl
);