1 /* Default language-specific hooks.
2 Copyright 2001, 2002 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 2, 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 COPYING. If not, write to
19 the Free Software Foundation, 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA. */
24 #include "coretypes.h"
29 #include "tree-inline.h"
31 #include "insn-config.h"
32 #include "integrate.h"
34 #include "langhooks.h"
35 #include "langhooks-def.h"
37 /* Do nothing; in many cases the default hook. */
44 /* Do nothing (tree). */
48 tree t ATTRIBUTE_UNUSED
;
52 /* Do nothing (int). */
56 int i ATTRIBUTE_UNUSED
;
60 /* Do nothing (function). */
64 struct function
*f ATTRIBUTE_UNUSED
;
68 /* Do nothing (return the tree node passed). */
77 /* Do nothing (return NULL_TREE). */
80 lhd_return_null_tree (t
)
81 tree t ATTRIBUTE_UNUSED
;
86 /* Do nothing; the default hook to decode an option. */
89 lhd_decode_option (argc
, argv
)
90 int argc ATTRIBUTE_UNUSED
;
91 char **argv ATTRIBUTE_UNUSED
;
96 /* The default post options hook. */
99 lhd_post_options (pfilename
)
100 const char **pfilename ATTRIBUTE_UNUSED
;
105 /* Called from by print-tree.c. */
108 lhd_print_tree_nothing (file
, node
, indent
)
109 FILE *file ATTRIBUTE_UNUSED
;
110 tree node ATTRIBUTE_UNUSED
;
111 int indent ATTRIBUTE_UNUSED
;
115 /* Called from safe_from_p. */
118 lhd_safe_from_p (x
, exp
)
119 rtx x ATTRIBUTE_UNUSED
;
120 tree exp ATTRIBUTE_UNUSED
;
125 /* Called from unsafe_for_reeval. */
128 lhd_unsafe_for_reeval (t
)
129 tree t ATTRIBUTE_UNUSED
;
134 /* Called from staticp. */
138 tree exp ATTRIBUTE_UNUSED
;
143 /* Called from check_global_declarations. */
146 lhd_warn_unused_global_decl (decl
)
149 /* This is what used to exist in check_global_declarations. Probably
150 not many of these actually apply to non-C languages. */
152 if (TREE_CODE (decl
) == FUNCTION_DECL
&& DECL_INLINE (decl
))
154 if (TREE_CODE (decl
) == VAR_DECL
&& TREE_READONLY (decl
))
156 if (DECL_IN_SYSTEM_HEADER (decl
))
162 /* Set the DECL_ASSEMBLER_NAME for DECL. */
164 lhd_set_decl_assembler_name (decl
)
167 /* The language-independent code should never use the
168 DECL_ASSEMBLER_NAME for lots of DECLs. Only FUNCTION_DECLs and
169 VAR_DECLs for variables with static storage duration need a real
170 DECL_ASSEMBLER_NAME. */
171 if (TREE_CODE (decl
) == FUNCTION_DECL
172 || (TREE_CODE (decl
) == VAR_DECL
173 && (TREE_STATIC (decl
)
174 || DECL_EXTERNAL (decl
)
175 || TREE_PUBLIC (decl
))))
176 /* By default, assume the name to use in assembly code is the
177 same as that used in the source language. (That's correct
178 for C, and GCC used to set DECL_ASSEMBLER_NAME to the same
179 value as DECL_NAME in build_decl, so this choice provides
180 backwards compatibility with existing front-ends. */
181 SET_DECL_ASSEMBLER_NAME (decl
, DECL_NAME (decl
));
183 /* Nobody should ever be asking for the DECL_ASSEMBLER_NAME of
184 these DECLs -- unless they're in language-dependent code, in
185 which case set_decl_assembler_name hook should handle things. */
189 /* By default we always allow bit-field based optimizations. */
191 lhd_can_use_bit_fields_p ()
196 /* Provide a default routine to clear the binding stack. This is used
197 by languages that don't need to do anything special. */
199 lhd_clear_binding_stack ()
201 while (! (*lang_hooks
.decls
.global_bindings_p
) ())
205 /* Type promotion for variable arguments. */
207 lhd_type_promotes_to (type
)
208 tree type ATTRIBUTE_UNUSED
;
213 /* Invalid use of an incomplete type. */
215 lhd_incomplete_type_error (value
, type
)
216 tree value ATTRIBUTE_UNUSED
, type
;
218 if (TREE_CODE (type
) == ERROR_MARK
)
224 /* Provide a default routine for alias sets that always returns -1. This
225 is used by languages that don't need to do anything special. */
228 lhd_get_alias_set (t
)
229 tree t ATTRIBUTE_UNUSED
;
234 /* Provide a hook routine for alias sets that always returns 0. This is
235 used by languages that haven't deal with alias sets yet. */
238 hook_get_alias_set_0 (t
)
239 tree t ATTRIBUTE_UNUSED
;
244 /* This is the default expand_expr function. */
247 lhd_expand_expr (t
, r
, mm
, em
)
248 tree t ATTRIBUTE_UNUSED
;
249 rtx r ATTRIBUTE_UNUSED
;
250 enum machine_mode mm ATTRIBUTE_UNUSED
;
251 int em ATTRIBUTE_UNUSED
;
256 /* This is the default decl_printable_name function. */
259 lhd_decl_printable_name (decl
, verbosity
)
261 int verbosity ATTRIBUTE_UNUSED
;
263 return IDENTIFIER_POINTER (DECL_NAME (decl
));
266 /* lang_hooks.tree_inlining.walk_subtrees is called by walk_tree()
267 after handling common cases, but before walking code-specific
268 sub-trees. If this hook is overridden for a language, it should
269 handle language-specific tree codes, as well as language-specific
270 information associated to common tree codes. If a tree node is
271 completely handled within this function, it should set *SUBTREES to
272 0, so that generic handling isn't attempted. For language-specific
273 tree codes, generic handling would abort(), so make sure it is set
274 properly. Both SUBTREES and *SUBTREES is guaranteed to be nonzero
275 when the function is called. */
278 lhd_tree_inlining_walk_subtrees (tp
,subtrees
,func
,data
,htab
)
279 tree
*tp ATTRIBUTE_UNUSED
;
280 int *subtrees ATTRIBUTE_UNUSED
;
281 walk_tree_fn func ATTRIBUTE_UNUSED
;
282 void *data ATTRIBUTE_UNUSED
;
283 void *htab ATTRIBUTE_UNUSED
;
288 /* lang_hooks.tree_inlining.cannot_inline_tree_fn is called to
289 determine whether there are language-specific reasons for not
290 inlining a given function. */
293 lhd_tree_inlining_cannot_inline_tree_fn (fnp
)
296 if (flag_really_no_inline
297 && lookup_attribute ("always_inline", DECL_ATTRIBUTES (*fnp
)) == NULL
)
303 /* lang_hooks.tree_inlining.disregard_inline_limits is called to
304 determine whether a function should be considered for inlining even
305 if it would exceed inlining limits. */
308 lhd_tree_inlining_disregard_inline_limits (fn
)
311 if (lookup_attribute ("always_inline", DECL_ATTRIBUTES (fn
)) != NULL
)
317 /* lang_hooks.tree_inlining.add_pending_fn_decls is called before
318 starting to inline a function, to push any language-specific
319 functions that should not be inlined into the current function,
320 into VAFNP. PFN is the top of varray, and should be returned if no
321 functions are pushed into VAFNP. The top of the varray should be
325 lhd_tree_inlining_add_pending_fn_decls (vafnp
, pfn
)
326 void *vafnp ATTRIBUTE_UNUSED
;
332 /* lang_hooks.tree_inlining.tree_chain_matters_p indicates whether the
333 TREE_CHAIN of a language-specific tree node is relevant, i.e.,
334 whether it should be walked, copied and preserved across copies. */
337 lhd_tree_inlining_tree_chain_matters_p (t
)
338 tree t ATTRIBUTE_UNUSED
;
343 /* lang_hooks.tree_inlining.auto_var_in_fn_p is called to determine
344 whether VT is an automatic variable defined in function FT. */
347 lhd_tree_inlining_auto_var_in_fn_p (var
, fn
)
350 return (DECL_P (var
) && DECL_CONTEXT (var
) == fn
351 && (((TREE_CODE (var
) == VAR_DECL
|| TREE_CODE (var
) == PARM_DECL
)
352 && ! TREE_STATIC (var
))
353 || TREE_CODE (var
) == LABEL_DECL
354 || TREE_CODE (var
) == RESULT_DECL
));
357 /* lang_hooks.tree_inlining.copy_res_decl_for_inlining should return a
358 declaration for the result RES of function FN to be inlined into
359 CALLER. NDP points to an integer that should be set in case a new
360 declaration wasn't created (presumably because RES was of aggregate
361 type, such that a TARGET_EXPR is used for the result). TEXPS is a
362 pointer to a varray with the stack of TARGET_EXPRs seen while
363 inlining functions into caller; the top of TEXPS is supposed to
367 lhd_tree_inlining_copy_res_decl_for_inlining (res
, fn
, caller
,
368 dm
, ndp
, return_slot_addr
)
369 tree res
, fn
, caller
;
370 void *dm ATTRIBUTE_UNUSED
;
371 int *ndp ATTRIBUTE_UNUSED
;
372 tree return_slot_addr ATTRIBUTE_UNUSED
;
374 if (return_slot_addr
)
375 return build1 (INDIRECT_REF
, TREE_TYPE (TREE_TYPE (return_slot_addr
)),
378 return copy_decl_for_inlining (res
, fn
, caller
);
381 /* lang_hooks.tree_inlining.anon_aggr_type_p determines whether T is a
382 type node representing an anonymous aggregate (union, struct, etc),
383 i.e., one whose members are in the same scope as the union itself. */
386 lhd_tree_inlining_anon_aggr_type_p (t
)
387 tree t ATTRIBUTE_UNUSED
;
392 /* lang_hooks.tree_inlining.start_inlining and end_inlining perform any
393 language-specific bookkeeping necessary for processing
394 FN. start_inlining returns nonzero if inlining should proceed, zero if
397 For instance, the C++ version keeps track of template instantiations to
398 avoid infinite recursion. */
401 lhd_tree_inlining_start_inlining (fn
)
402 tree fn ATTRIBUTE_UNUSED
;
408 lhd_tree_inlining_end_inlining (fn
)
409 tree fn ATTRIBUTE_UNUSED
;
413 /* lang_hooks.tree_inlining.convert_parm_for_inlining performs any
414 language-specific conversion before assigning VALUE to PARM. */
417 lhd_tree_inlining_convert_parm_for_inlining (parm
, value
, fndecl
)
418 tree parm ATTRIBUTE_UNUSED
;
420 tree fndecl ATTRIBUTE_UNUSED
;
425 /* lang_hooks.tree_dump.dump_tree: Dump language-specific parts of tree
426 nodes. Returns nonzero if it does not want the usual dumping of the
430 lhd_tree_dump_dump_tree (di
, t
)
431 void *di ATTRIBUTE_UNUSED
;
432 tree t ATTRIBUTE_UNUSED
;
437 /* lang_hooks.tree_dump.type_qual: Determine type qualifiers in a
438 language-specific way. */
441 lhd_tree_dump_type_quals (t
)
444 return TYPE_QUALS (t
);
447 /* lang_hooks.expr_size: Determine the size of the value of an expression T
448 in a language-specific way. Returns a tree for the size in bytes. */
454 if (TREE_CODE_CLASS (TREE_CODE (exp
)) == 'd'
455 && DECL_SIZE_UNIT (exp
) != 0)
456 return DECL_SIZE_UNIT (exp
);
458 return size_in_bytes (TREE_TYPE (exp
));
461 /* lang_hooks.decls.final_write_globals: perform final processing on
464 write_global_declarations ()
466 /* Really define vars that have had only a tentative definition.
467 Really output inline functions that must actually be callable
468 and have not been output so far. */
470 tree globals
= (*lang_hooks
.decls
.getdecls
) ();
471 int len
= list_length (globals
);
472 tree
*vec
= (tree
*) xmalloc (sizeof (tree
) * len
);
476 /* Process the decls in reverse order--earliest first.
477 Put them into VEC from back to front, then take out from front. */
479 for (i
= 0, decl
= globals
; i
< len
; i
++, decl
= TREE_CHAIN (decl
))
480 vec
[len
- i
- 1] = decl
;
482 wrapup_global_declarations (vec
, len
);
484 check_global_declarations (vec
, len
);