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 GNU CC.
7 GNU CC 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 GNU CC 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 GNU CC; see the file COPYING. If not, write to
19 the Free Software Foundation, 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA. */
27 #include "tree-inline.h"
29 #include "insn-config.h"
30 #include "integrate.h"
32 #include "langhooks.h"
33 #include "langhooks-def.h"
35 /* Do nothing; in many cases the default hook. */
46 tree t ATTRIBUTE_UNUSED
;
50 /* Do nothing (return the tree node passed). */
59 /* Do nothing (return NULL_TREE). */
62 lhd_return_null_tree (t
)
63 tree t ATTRIBUTE_UNUSED
;
68 /* Do nothing; the default hook to decode an option. */
71 lhd_decode_option (argc
, argv
)
72 int argc ATTRIBUTE_UNUSED
;
73 char **argv ATTRIBUTE_UNUSED
;
78 /* Called from by print-tree.c. */
81 lhd_print_tree_nothing (file
, node
, indent
)
82 FILE *file ATTRIBUTE_UNUSED
;
83 tree node ATTRIBUTE_UNUSED
;
84 int indent ATTRIBUTE_UNUSED
;
88 /* Called from safe_from_p. */
91 lhd_safe_from_p (x
, exp
)
92 rtx x ATTRIBUTE_UNUSED
;
93 tree exp ATTRIBUTE_UNUSED
;
98 /* Called from unsafe_for_reeval. */
101 lhd_unsafe_for_reeval (t
)
102 tree t ATTRIBUTE_UNUSED
;
107 /* Called from staticp. */
111 tree exp ATTRIBUTE_UNUSED
;
116 /* Called from check_global_declarations. */
119 lhd_warn_unused_global_decl (decl
)
122 /* This is what used to exist in check_global_declarations. Probably
123 not many of these actually apply to non-C languages. */
125 if (TREE_CODE (decl
) == FUNCTION_DECL
&& DECL_INLINE (decl
))
127 if (TREE_CODE (decl
) == VAR_DECL
&& TREE_READONLY (decl
))
129 if (DECL_IN_SYSTEM_HEADER (decl
))
135 /* Called when -dy is given on the command line. */
138 lhd_set_yydebug (value
)
142 fprintf (stderr
, "warning: no yacc/bison-generated output to debug!\n");
145 /* Set the DECL_ASSEMBLER_NAME for DECL. */
147 lhd_set_decl_assembler_name (decl
)
150 /* The language-independent code should never use the
151 DECL_ASSEMBLER_NAME for lots of DECLs. Only FUNCTION_DECLs and
152 VAR_DECLs for variables with static storage duration need a real
153 DECL_ASSEMBLER_NAME. */
154 if (TREE_CODE (decl
) == FUNCTION_DECL
155 || (TREE_CODE (decl
) == VAR_DECL
156 && (TREE_STATIC (decl
)
157 || DECL_EXTERNAL (decl
)
158 || TREE_PUBLIC (decl
))))
159 /* By default, assume the name to use in assembly code is the
160 same as that used in the source language. (That's correct
161 for C, and GCC used to set DECL_ASSEMBLER_NAME to the same
162 value as DECL_NAME in build_decl, so this choice provides
163 backwards compatibility with existing front-ends. */
164 SET_DECL_ASSEMBLER_NAME (decl
, DECL_NAME (decl
));
166 /* Nobody should ever be asking for the DECL_ASSEMBLER_NAME of
167 these DECLs -- unless they're in language-dependent code, in
168 which case set_decl_assembler_name hook should handle things. */
172 /* Provide a default routine to clear the binding stack. This is used
173 by languages that don't need to do anything special. */
175 lhd_clear_binding_stack ()
177 while (! (*lang_hooks
.decls
.global_bindings_p
) ())
181 /* Type promotion for variable arguments. */
183 lhd_type_promotes_to (type
)
184 tree type ATTRIBUTE_UNUSED
;
189 /* Invalid use of an incomplete type. */
191 lhd_incomplete_type_error (value
, type
)
192 tree value ATTRIBUTE_UNUSED
, type
;
194 if (TREE_CODE (type
) == ERROR_MARK
)
200 /* Provide a default routine for alias sets that always returns -1. This
201 is used by languages that don't need to do anything special. */
204 lhd_get_alias_set (t
)
205 tree t ATTRIBUTE_UNUSED
;
210 /* Provide a hook routine for alias sets that always returns 0. This is
211 used by languages that haven't deal with alias sets yet. */
214 hook_get_alias_set_0 (t
)
215 tree t ATTRIBUTE_UNUSED
;
220 /* This is the default expand_expr function. */
223 lhd_expand_expr (t
, r
, mm
, em
)
224 tree t ATTRIBUTE_UNUSED
;
225 rtx r ATTRIBUTE_UNUSED
;
226 enum machine_mode mm ATTRIBUTE_UNUSED
;
227 int em ATTRIBUTE_UNUSED
;
232 /* This is the default decl_printable_name function. */
235 lhd_decl_printable_name (decl
, verbosity
)
237 int verbosity ATTRIBUTE_UNUSED
;
239 return IDENTIFIER_POINTER (DECL_NAME (decl
));
242 /* lang_hooks.tree_inlining.walk_subtrees is called by walk_tree()
243 after handling common cases, but before walking code-specific
244 sub-trees. If this hook is overridden for a language, it should
245 handle language-specific tree codes, as well as language-specific
246 information associated to common tree codes. If a tree node is
247 completely handled within this function, it should set *SUBTREES to
248 0, so that generic handling isn't attempted. For language-specific
249 tree codes, generic handling would abort(), so make sure it is set
250 properly. Both SUBTREES and *SUBTREES is guaranteed to be non-zero
251 when the function is called. */
254 lhd_tree_inlining_walk_subtrees (tp
,subtrees
,func
,data
,htab
)
255 tree
*tp ATTRIBUTE_UNUSED
;
256 int *subtrees ATTRIBUTE_UNUSED
;
257 walk_tree_fn func ATTRIBUTE_UNUSED
;
258 void *data ATTRIBUTE_UNUSED
;
259 void *htab ATTRIBUTE_UNUSED
;
264 /* lang_hooks.tree_inlining.cannot_inline_tree_fn is called to
265 determine whether there are language-specific reasons for not
266 inlining a given function. */
269 lhd_tree_inlining_cannot_inline_tree_fn (fnp
)
272 if (flag_really_no_inline
273 && lookup_attribute ("always_inline", DECL_ATTRIBUTES (*fnp
)) == NULL
)
279 /* lang_hooks.tree_inlining.disregard_inline_limits is called to
280 determine whether a function should be considered for inlining even
281 if it would exceed inlining limits. */
284 lhd_tree_inlining_disregard_inline_limits (fn
)
287 if (lookup_attribute ("always_inline", DECL_ATTRIBUTES (fn
)) != NULL
)
293 /* lang_hooks.tree_inlining.add_pending_fn_decls is called before
294 starting to inline a function, to push any language-specific
295 functions that should not be inlined into the current function,
296 into VAFNP. PFN is the top of varray, and should be returned if no
297 functions are pushed into VAFNP. The top of the varray should be
301 lhd_tree_inlining_add_pending_fn_decls (vafnp
, pfn
)
302 void *vafnp ATTRIBUTE_UNUSED
;
308 /* lang_hooks.tree_inlining.tree_chain_matters_p indicates whether the
309 TREE_CHAIN of a language-specific tree node is relevant, i.e.,
310 whether it should be walked, copied and preserved across copies. */
313 lhd_tree_inlining_tree_chain_matters_p (t
)
314 tree t ATTRIBUTE_UNUSED
;
319 /* lang_hooks.tree_inlining.auto_var_in_fn_p is called to determine
320 whether VT is an automatic variable defined in function FT. */
323 lhd_tree_inlining_auto_var_in_fn_p (var
, fn
)
326 return (DECL_P (var
) && DECL_CONTEXT (var
) == fn
327 && (((TREE_CODE (var
) == VAR_DECL
|| TREE_CODE (var
) == PARM_DECL
)
328 && ! TREE_STATIC (var
))
329 || TREE_CODE (var
) == LABEL_DECL
330 || TREE_CODE (var
) == RESULT_DECL
));
333 /* lang_hooks.tree_inlining.copy_res_decl_for_inlining should return a
334 declaration for the result RES of function FN to be inlined into
335 CALLER. NDP points to an integer that should be set in case a new
336 declaration wasn't created (presumably because RES was of aggregate
337 type, such that a TARGET_EXPR is used for the result). TEXPS is a
338 pointer to a varray with the stack of TARGET_EXPRs seen while
339 inlining functions into caller; the top of TEXPS is supposed to
343 lhd_tree_inlining_copy_res_decl_for_inlining (res
, fn
, caller
,
345 tree res
, fn
, caller
;
346 void *dm ATTRIBUTE_UNUSED
;
347 int *ndp ATTRIBUTE_UNUSED
;
348 void *texps ATTRIBUTE_UNUSED
;
350 return copy_decl_for_inlining (res
, fn
, caller
);
353 /* lang_hooks.tree_inlining.anon_aggr_type_p determines whether T is a
354 type node representing an anonymous aggregate (union, struct, etc),
355 i.e., one whose members are in the same scope as the union itself. */
358 lhd_tree_inlining_anon_aggr_type_p (t
)
359 tree t ATTRIBUTE_UNUSED
;
364 /* lang_hooks.tree_inlining.start_inlining and end_inlining perform any
365 language-specific bookkeeping necessary for processing
366 FN. start_inlining returns non-zero if inlining should proceed, zero if
369 For instance, the C++ version keeps track of template instantiations to
370 avoid infinite recursion. */
373 lhd_tree_inlining_start_inlining (fn
)
374 tree fn ATTRIBUTE_UNUSED
;
380 lhd_tree_inlining_end_inlining (fn
)
381 tree fn ATTRIBUTE_UNUSED
;
385 /* lang_hooks.tree_inlining.convert_parm_for_inlining performs any
386 language-specific conversion before assigning VALUE to PARM. */
389 lhd_tree_inlining_convert_parm_for_inlining (parm
, value
, fndecl
)
390 tree parm ATTRIBUTE_UNUSED
;
392 tree fndecl ATTRIBUTE_UNUSED
;
397 /* lang_hooks.tree_dump.dump_tree: Dump language-specific parts of tree
398 nodes. Returns non-zero if it does not want the usual dumping of the
402 lhd_tree_dump_dump_tree (di
, t
)
403 void *di ATTRIBUTE_UNUSED
;
404 tree t ATTRIBUTE_UNUSED
;
409 /* lang_hooks.tree_dump.type_qual: Determine type qualifiers in a
410 language-specific way. */
413 lhd_tree_dump_type_quals (t
)
416 return TYPE_QUALS (t
);