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 /* Provide a default routine for alias sets that always returns -1. This
182 is used by languages that don't need to do anything special. */
185 lhd_get_alias_set (t
)
186 tree t ATTRIBUTE_UNUSED
;
191 /* Provide a hook routine for alias sets that always returns 0. This is
192 used by languages that haven't deal with alias sets yet. */
195 hook_get_alias_set_0 (t
)
196 tree t ATTRIBUTE_UNUSED
;
201 /* This is the default expand_expr function. */
204 lhd_expand_expr (t
, r
, mm
, em
)
205 tree t ATTRIBUTE_UNUSED
;
206 rtx r ATTRIBUTE_UNUSED
;
207 enum machine_mode mm ATTRIBUTE_UNUSED
;
208 int em ATTRIBUTE_UNUSED
;
213 /* This is the default decl_printable_name function. */
216 lhd_decl_printable_name (decl
, verbosity
)
218 int verbosity ATTRIBUTE_UNUSED
;
220 return IDENTIFIER_POINTER (DECL_NAME (decl
));
223 /* lang_hooks.tree_inlining.walk_subtrees is called by walk_tree()
224 after handling common cases, but before walking code-specific
225 sub-trees. If this hook is overridden for a language, it should
226 handle language-specific tree codes, as well as language-specific
227 information associated to common tree codes. If a tree node is
228 completely handled within this function, it should set *SUBTREES to
229 0, so that generic handling isn't attempted. For language-specific
230 tree codes, generic handling would abort(), so make sure it is set
231 properly. Both SUBTREES and *SUBTREES is guaranteed to be non-zero
232 when the function is called. */
235 lhd_tree_inlining_walk_subtrees (tp
,subtrees
,func
,data
,htab
)
236 tree
*tp ATTRIBUTE_UNUSED
;
237 int *subtrees ATTRIBUTE_UNUSED
;
238 walk_tree_fn func ATTRIBUTE_UNUSED
;
239 void *data ATTRIBUTE_UNUSED
;
240 void *htab ATTRIBUTE_UNUSED
;
245 /* lang_hooks.tree_inlining.cannot_inline_tree_fn is called to
246 determine whether there are language-specific reasons for not
247 inlining a given function. */
250 lhd_tree_inlining_cannot_inline_tree_fn (fnp
)
253 if (flag_really_no_inline
254 && lookup_attribute ("always_inline", DECL_ATTRIBUTES (*fnp
)) == NULL
)
260 /* lang_hooks.tree_inlining.disregard_inline_limits is called to
261 determine whether a function should be considered for inlining even
262 if it would exceed inlining limits. */
265 lhd_tree_inlining_disregard_inline_limits (fn
)
268 if (lookup_attribute ("always_inline", DECL_ATTRIBUTES (fn
)) != NULL
)
274 /* lang_hooks.tree_inlining.add_pending_fn_decls is called before
275 starting to inline a function, to push any language-specific
276 functions that should not be inlined into the current function,
277 into VAFNP. PFN is the top of varray, and should be returned if no
278 functions are pushed into VAFNP. The top of the varray should be
282 lhd_tree_inlining_add_pending_fn_decls (vafnp
, pfn
)
283 void *vafnp ATTRIBUTE_UNUSED
;
289 /* lang_hooks.tree_inlining.tree_chain_matters_p indicates whether the
290 TREE_CHAIN of a language-specific tree node is relevant, i.e.,
291 whether it should be walked, copied and preserved across copies. */
294 lhd_tree_inlining_tree_chain_matters_p (t
)
295 tree t ATTRIBUTE_UNUSED
;
300 /* lang_hooks.tree_inlining.auto_var_in_fn_p is called to determine
301 whether VT is an automatic variable defined in function FT. */
304 lhd_tree_inlining_auto_var_in_fn_p (var
, fn
)
307 return (DECL_P (var
) && DECL_CONTEXT (var
) == fn
308 && (((TREE_CODE (var
) == VAR_DECL
|| TREE_CODE (var
) == PARM_DECL
)
309 && ! TREE_STATIC (var
))
310 || TREE_CODE (var
) == LABEL_DECL
311 || TREE_CODE (var
) == RESULT_DECL
));
314 /* lang_hooks.tree_inlining.copy_res_decl_for_inlining should return a
315 declaration for the result RES of function FN to be inlined into
316 CALLER. NDP points to an integer that should be set in case a new
317 declaration wasn't created (presumably because RES was of aggregate
318 type, such that a TARGET_EXPR is used for the result). TEXPS is a
319 pointer to a varray with the stack of TARGET_EXPRs seen while
320 inlining functions into caller; the top of TEXPS is supposed to
324 lhd_tree_inlining_copy_res_decl_for_inlining (res
, fn
, caller
,
326 tree res
, fn
, caller
;
327 void *dm ATTRIBUTE_UNUSED
;
328 int *ndp ATTRIBUTE_UNUSED
;
329 void *texps ATTRIBUTE_UNUSED
;
331 return copy_decl_for_inlining (res
, fn
, caller
);
334 /* lang_hooks.tree_inlining.anon_aggr_type_p determines whether T is a
335 type node representing an anonymous aggregate (union, struct, etc),
336 i.e., one whose members are in the same scope as the union itself. */
339 lhd_tree_inlining_anon_aggr_type_p (t
)
340 tree t ATTRIBUTE_UNUSED
;
345 /* lang_hooks.tree_inlining.start_inlining and end_inlining perform any
346 language-specific bookkeeping necessary for processing
347 FN. start_inlining returns non-zero if inlining should proceed, zero if
350 For instance, the C++ version keeps track of template instantiations to
351 avoid infinite recursion. */
354 lhd_tree_inlining_start_inlining (fn
)
355 tree fn ATTRIBUTE_UNUSED
;
361 lhd_tree_inlining_end_inlining (fn
)
362 tree fn ATTRIBUTE_UNUSED
;
366 /* lang_hooks.tree_inlining.convert_parm_for_inlining performs any
367 language-specific conversion before assigning VALUE to PARM. */
370 lhd_tree_inlining_convert_parm_for_inlining (parm
, value
, fndecl
)
371 tree parm ATTRIBUTE_UNUSED
;
373 tree fndecl ATTRIBUTE_UNUSED
;
378 /* lang_hooks.tree_dump.dump_tree: Dump language-specific parts of tree
379 nodes. Returns non-zero if it does not want the usual dumping of the
383 lhd_tree_dump_dump_tree (di
, t
)
384 void *di ATTRIBUTE_UNUSED
;
385 tree t ATTRIBUTE_UNUSED
;
390 /* lang_hooks.tree_dump.type_qual: Determine type qualifiers in a
391 language-specific way. */
394 lhd_tree_dump_type_quals (t
)
397 return TYPE_QUALS (t
);