1 /* Default language-specific hooks.
2 Copyright 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008
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"
30 #include "tree-gimple.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
))
111 /* Called from by print-tree.c. */
114 lhd_print_tree_nothing (FILE * ARG_UNUSED (file
),
115 tree
ARG_UNUSED (node
),
116 int ARG_UNUSED (indent
))
120 /* Called from staticp. */
123 lhd_staticp (tree
ARG_UNUSED (exp
))
128 /* Called from check_global_declarations. */
131 lhd_warn_unused_global_decl (const_tree decl
)
133 /* This is what used to exist in check_global_declarations. Probably
134 not many of these actually apply to non-C languages. */
136 if (TREE_CODE (decl
) == FUNCTION_DECL
&& DECL_INLINE (decl
))
138 if (TREE_CODE (decl
) == VAR_DECL
&& TREE_READONLY (decl
))
140 if (DECL_IN_SYSTEM_HEADER (decl
))
146 /* Set the DECL_ASSEMBLER_NAME for DECL. */
148 lhd_set_decl_assembler_name (tree decl
)
152 /* The language-independent code should never use the
153 DECL_ASSEMBLER_NAME for lots of DECLs. Only FUNCTION_DECLs and
154 VAR_DECLs for variables with static storage duration need a real
155 DECL_ASSEMBLER_NAME. */
156 gcc_assert (TREE_CODE (decl
) == FUNCTION_DECL
157 || (TREE_CODE (decl
) == VAR_DECL
158 && (TREE_STATIC (decl
)
159 || DECL_EXTERNAL (decl
)
160 || TREE_PUBLIC (decl
))));
162 /* By default, assume the name to use in assembly code is the same
163 as that used in the source language. (That's correct for C, and
164 GCC used to set DECL_ASSEMBLER_NAME to the same value as
165 DECL_NAME in build_decl, so this choice provides backwards
166 compatibility with existing front-ends. This assumption is wrapped
167 in a target hook, to allow for target-specific modification of the
170 Can't use just the variable's own name for a variable whose scope
171 is less than the whole compilation. Concatenate a distinguishing
172 number - we use the DECL_UID. */
174 if (TREE_PUBLIC (decl
) || DECL_CONTEXT (decl
) == NULL_TREE
)
175 id
= targetm
.mangle_decl_assembler_name (decl
, DECL_NAME (decl
));
178 const char *name
= IDENTIFIER_POINTER (DECL_NAME (decl
));
181 ASM_FORMAT_PRIVATE_NAME (label
, name
, DECL_UID (decl
));
182 id
= get_identifier (label
);
184 SET_DECL_ASSEMBLER_NAME (decl
, id
);
188 /* Type promotion for variable arguments. */
190 lhd_type_promotes_to (tree
ARG_UNUSED (type
))
195 /* Registration of machine- or os-specific builtin types. */
197 lhd_register_builtin_type (tree
ARG_UNUSED (type
),
198 const char * ARG_UNUSED (name
))
202 /* Invalid use of an incomplete type. */
204 lhd_incomplete_type_error (const_tree
ARG_UNUSED (value
), const_tree type
)
206 gcc_assert (TREE_CODE (type
) == ERROR_MARK
);
210 /* Provide a default routine for alias sets that always returns -1. This
211 is used by languages that don't need to do anything special. */
214 lhd_get_alias_set (tree
ARG_UNUSED (t
))
219 /* This is the default expand_expr function. */
222 lhd_expand_expr (tree
ARG_UNUSED (t
), rtx
ARG_UNUSED (r
),
223 enum machine_mode
ARG_UNUSED (mm
),
225 rtx
* ARG_UNUSED (a
))
230 /* The default language-specific function for expanding a decl. After
231 the language-independent cases are handled, this function will be
232 called. If this function is not defined, it is assumed that
233 declarations other than those for variables and labels do not require
234 any RTL generation. */
237 lhd_expand_decl (tree
ARG_UNUSED (t
))
242 /* This is the default decl_printable_name function. */
245 lhd_decl_printable_name (tree decl
, int ARG_UNUSED (verbosity
))
247 gcc_assert (decl
&& DECL_NAME (decl
));
248 return IDENTIFIER_POINTER (DECL_NAME (decl
));
251 /* This is the default dwarf_name function. */
254 lhd_dwarf_name (tree t
, int verbosity
)
256 gcc_assert (DECL_P (t
));
258 return lang_hooks
.decl_printable_name (t
, verbosity
);
261 /* This compares two types for equivalence ("compatible" in C-based languages).
262 This routine should only return 1 if it is sure. It should not be used
263 in contexts where erroneously returning 0 causes problems. */
266 lhd_types_compatible_p (tree x
, tree y
)
268 return TYPE_MAIN_VARIANT (x
) == TYPE_MAIN_VARIANT (y
);
271 /* lang_hooks.tree_dump.dump_tree: Dump language-specific parts of tree
272 nodes. Returns nonzero if it does not want the usual dumping of the
276 lhd_tree_dump_dump_tree (void *di ATTRIBUTE_UNUSED
, tree t ATTRIBUTE_UNUSED
)
281 /* lang_hooks.tree_dump.type_qual: Determine type qualifiers in a
282 language-specific way. */
285 lhd_tree_dump_type_quals (const_tree t
)
287 return TYPE_QUALS (t
);
290 /* lang_hooks.expr_size: Determine the size of the value of an expression T
291 in a language-specific way. Returns a tree for the size in bytes. */
294 lhd_expr_size (const_tree exp
)
297 && DECL_SIZE_UNIT (exp
) != 0)
298 return DECL_SIZE_UNIT (exp
);
300 return size_in_bytes (TREE_TYPE (exp
));
303 /* lang_hooks.gimplify_expr re-writes *EXPR_P into GIMPLE form. */
306 lhd_gimplify_expr (tree
*expr_p ATTRIBUTE_UNUSED
, tree
*pre_p ATTRIBUTE_UNUSED
,
307 tree
*post_p ATTRIBUTE_UNUSED
)
312 /* lang_hooks.tree_size: Determine the size of a tree with code C,
313 which is a language-specific tree code in category tcc_constant or
314 tcc_exceptional. The default expects never to be called. */
316 lhd_tree_size (enum tree_code c ATTRIBUTE_UNUSED
)
321 /* Return true if decl, which is a function decl, may be called by a
325 lhd_decl_ok_for_sibcall (const_tree decl ATTRIBUTE_UNUSED
)
330 /* Return the COMDAT group into which DECL should be placed. */
333 lhd_comdat_group (tree decl
)
335 return IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl
));
338 /* lang_hooks.decls.final_write_globals: perform final processing on
341 write_global_declarations (void)
343 /* Really define vars that have had only a tentative definition.
344 Really output inline functions that must actually be callable
345 and have not been output so far. */
347 tree globals
= lang_hooks
.decls
.getdecls ();
348 int len
= list_length (globals
);
349 tree
*vec
= XNEWVEC (tree
, len
);
353 /* Process the decls in reverse order--earliest first.
354 Put them into VEC from back to front, then take out from front. */
356 for (i
= 0, decl
= globals
; i
< len
; i
++, decl
= TREE_CHAIN (decl
))
357 vec
[len
- i
- 1] = decl
;
359 wrapup_global_declarations (vec
, len
);
360 check_global_declarations (vec
, len
);
361 emit_debug_global_declarations (vec
, len
);
367 /* Called to perform language-specific initialization of CTX. */
369 lhd_initialize_diagnostics (struct diagnostic_context
*ctx ATTRIBUTE_UNUSED
)
373 /* The default function to print out name of current function that caused
376 lhd_print_error_function (diagnostic_context
*context
, const char *file
,
377 diagnostic_info
*diagnostic
)
379 if (diagnostic_last_function_changed (context
, diagnostic
))
381 const char *old_prefix
= context
->printer
->prefix
;
382 tree abstract_origin
= diagnostic
->abstract_origin
;
383 char *new_prefix
= (file
&& abstract_origin
== NULL
)
384 ? file_name_as_prefix (file
) : NULL
;
386 pp_set_prefix (context
->printer
, new_prefix
);
388 if (current_function_decl
== NULL
)
389 pp_printf (context
->printer
, _("At top level:"));
396 ao
= BLOCK_ABSTRACT_ORIGIN (abstract_origin
);
397 while (TREE_CODE (ao
) == BLOCK
398 && BLOCK_ABSTRACT_ORIGIN (ao
)
399 && BLOCK_ABSTRACT_ORIGIN (ao
) != ao
)
400 ao
= BLOCK_ABSTRACT_ORIGIN (ao
);
401 gcc_assert (TREE_CODE (ao
) == FUNCTION_DECL
);
405 fndecl
= current_function_decl
;
407 if (TREE_CODE (TREE_TYPE (fndecl
)) == METHOD_TYPE
)
409 (context
->printer
, _("In member function %qs"),
410 lang_hooks
.decl_printable_name (fndecl
, 2));
413 (context
->printer
, _("In function %qs"),
414 lang_hooks
.decl_printable_name (fndecl
, 2));
416 while (abstract_origin
)
419 tree block
= abstract_origin
;
421 locus
= &BLOCK_SOURCE_LOCATION (block
);
423 block
= BLOCK_SUPERCONTEXT (block
);
424 while (block
&& TREE_CODE (block
) == BLOCK
425 && BLOCK_ABSTRACT_ORIGIN (block
))
427 ao
= BLOCK_ABSTRACT_ORIGIN (block
);
429 while (TREE_CODE (ao
) == BLOCK
430 && BLOCK_ABSTRACT_ORIGIN (ao
)
431 && BLOCK_ABSTRACT_ORIGIN (ao
) != ao
)
432 ao
= BLOCK_ABSTRACT_ORIGIN (ao
);
434 if (TREE_CODE (ao
) == FUNCTION_DECL
)
439 else if (TREE_CODE (ao
) != BLOCK
)
442 block
= BLOCK_SUPERCONTEXT (block
);
445 abstract_origin
= block
;
448 while (block
&& TREE_CODE (block
) == BLOCK
)
449 block
= BLOCK_SUPERCONTEXT (block
);
451 if (TREE_CODE (block
) == FUNCTION_DECL
)
453 abstract_origin
= NULL
;
457 expanded_location s
= expand_location (*locus
);
458 pp_character (context
->printer
, ',');
459 pp_newline (context
->printer
);
462 if (flag_show_column
&& s
.column
!= 0)
463 pp_printf (context
->printer
,
464 _(" inlined from %qs at %s:%d:%d"),
465 lang_hooks
.decl_printable_name (fndecl
, 2),
466 s
.file
, s
.line
, s
.column
);
468 pp_printf (context
->printer
,
469 _(" inlined from %qs at %s:%d"),
470 lang_hooks
.decl_printable_name (fndecl
, 2),
475 pp_printf (context
->printer
, _(" inlined from %qs"),
476 lang_hooks
.decl_printable_name (fndecl
, 2));
479 pp_character (context
->printer
, ':');
482 diagnostic_set_last_function (context
, diagnostic
);
483 pp_flush (context
->printer
);
484 context
->printer
->prefix
= old_prefix
;
485 free ((char*) new_prefix
);
490 lhd_callgraph_analyze_expr (tree
*tp ATTRIBUTE_UNUSED
,
491 int *walk_subtrees ATTRIBUTE_UNUSED
)
497 lhd_make_node (enum tree_code code
)
499 return make_node (code
);
503 lhd_to_target_charset (HOST_WIDE_INT c
)
509 lhd_expr_to_decl (tree expr
, bool *tc ATTRIBUTE_UNUSED
, bool *se ATTRIBUTE_UNUSED
)
514 /* Return sharing kind if OpenMP sharing attribute of DECL is
515 predetermined, OMP_CLAUSE_DEFAULT_UNSPECIFIED otherwise. */
517 enum omp_clause_default_kind
518 lhd_omp_predetermined_sharing (tree decl ATTRIBUTE_UNUSED
)
520 if (DECL_ARTIFICIAL (decl
))
521 return OMP_CLAUSE_DEFAULT_SHARED
;
522 return OMP_CLAUSE_DEFAULT_UNSPECIFIED
;
525 /* Generate code to copy SRC to DST. */
528 lhd_omp_assignment (tree clause ATTRIBUTE_UNUSED
, tree dst
, tree src
)
530 return build_gimple_modify_stmt (dst
, src
);
533 /* Register language specific type size variables as potentially OpenMP
534 firstprivate variables. */
537 lhd_omp_firstprivatize_type_sizes (struct gimplify_omp_ctx
*c ATTRIBUTE_UNUSED
,
538 tree t ATTRIBUTE_UNUSED
)
543 add_builtin_function (const char *name
,
546 enum built_in_class cl
,
547 const char *library_name
,
550 tree id
= get_identifier (name
);
551 tree decl
= build_decl (FUNCTION_DECL
, id
, type
);
553 TREE_PUBLIC (decl
) = 1;
554 DECL_EXTERNAL (decl
) = 1;
555 DECL_BUILT_IN_CLASS (decl
) = cl
;
557 DECL_FUNCTION_CODE (decl
) = -1;
558 gcc_assert (DECL_FUNCTION_CODE (decl
) >= function_code
);
559 DECL_FUNCTION_CODE (decl
) = function_code
;
563 tree libname
= get_identifier (library_name
);
564 SET_DECL_ASSEMBLER_NAME (decl
, libname
);
567 /* Possibly apply some default attributes to this built-in function. */
569 decl_attributes (&decl
, attrs
, ATTR_FLAG_BUILT_IN
);
571 decl_attributes (&decl
, NULL_TREE
, 0);
573 return lang_hooks
.builtin_function (decl
);
578 lhd_builtin_function (tree decl
)
580 lang_hooks
.decls
.pushdecl (decl
);