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 staticp. */
102 tree exp ATTRIBUTE_UNUSED
;
107 /* Called when -dy is given on the command line. */
110 lhd_set_yydebug (value
)
114 fprintf (stderr
, "warning: no yacc/bison-generated output to debug!\n");
117 /* Provide a default routine to clear the binding stack. This is used
118 by languages that don't need to do anything special. */
120 lhd_clear_binding_stack ()
122 while (! (*lang_hooks
.decls
.global_bindings_p
) ())
126 /* Provide a default routine for alias sets that always returns -1. This
127 is used by languages that don't need to do anything special. */
130 lhd_get_alias_set (t
)
131 tree t ATTRIBUTE_UNUSED
;
136 /* Provide a hook routine for alias sets that always returns 0. This is
137 used by languages that haven't deal with alias sets yet. */
140 hook_get_alias_set_0 (t
)
141 tree t ATTRIBUTE_UNUSED
;
146 /* This is the default expand_expr function. */
149 lhd_expand_expr (t
, r
, mm
, em
)
150 tree t ATTRIBUTE_UNUSED
;
151 rtx r ATTRIBUTE_UNUSED
;
152 enum machine_mode mm ATTRIBUTE_UNUSED
;
153 int em ATTRIBUTE_UNUSED
;
158 /* This is the default decl_printable_name function. */
161 lhd_decl_printable_name (decl
, verbosity
)
163 int verbosity ATTRIBUTE_UNUSED
;
165 return IDENTIFIER_POINTER (DECL_NAME (decl
));
168 /* lang_hooks.tree_inlining.walk_subtrees is called by walk_tree()
169 after handling common cases, but before walking code-specific
170 sub-trees. If this hook is overridden for a language, it should
171 handle language-specific tree codes, as well as language-specific
172 information associated to common tree codes. If a tree node is
173 completely handled within this function, it should set *SUBTREES to
174 0, so that generic handling isn't attempted. For language-specific
175 tree codes, generic handling would abort(), so make sure it is set
176 properly. Both SUBTREES and *SUBTREES is guaranteed to be non-zero
177 when the function is called. */
180 lhd_tree_inlining_walk_subtrees (tp
,subtrees
,func
,data
,htab
)
181 tree
*tp ATTRIBUTE_UNUSED
;
182 int *subtrees ATTRIBUTE_UNUSED
;
183 walk_tree_fn func ATTRIBUTE_UNUSED
;
184 void *data ATTRIBUTE_UNUSED
;
185 void *htab ATTRIBUTE_UNUSED
;
190 /* lang_hooks.tree_inlining.cannot_inline_tree_fn is called to
191 determine whether there are language-specific reasons for not
192 inlining a given function. */
195 lhd_tree_inlining_cannot_inline_tree_fn (fnp
)
198 if (flag_really_no_inline
199 && lookup_attribute ("always_inline", DECL_ATTRIBUTES (*fnp
)) == NULL
)
205 /* lang_hooks.tree_inlining.disregard_inline_limits is called to
206 determine whether a function should be considered for inlining even
207 if it would exceed inlining limits. */
210 lhd_tree_inlining_disregard_inline_limits (fn
)
213 if (lookup_attribute ("always_inline", DECL_ATTRIBUTES (fn
)) != NULL
)
219 /* lang_hooks.tree_inlining.add_pending_fn_decls is called before
220 starting to inline a function, to push any language-specific
221 functions that should not be inlined into the current function,
222 into VAFNP. PFN is the top of varray, and should be returned if no
223 functions are pushed into VAFNP. The top of the varray should be
227 lhd_tree_inlining_add_pending_fn_decls (vafnp
, pfn
)
228 void *vafnp ATTRIBUTE_UNUSED
;
234 /* lang_hooks.tree_inlining.tree_chain_matters_p indicates whether the
235 TREE_CHAIN of a language-specific tree node is relevant, i.e.,
236 whether it should be walked, copied and preserved across copies. */
239 lhd_tree_inlining_tree_chain_matters_p (t
)
240 tree t ATTRIBUTE_UNUSED
;
245 /* lang_hooks.tree_inlining.auto_var_in_fn_p is called to determine
246 whether VT is an automatic variable defined in function FT. */
249 lhd_tree_inlining_auto_var_in_fn_p (var
, fn
)
252 return (DECL_P (var
) && DECL_CONTEXT (var
) == fn
253 && (((TREE_CODE (var
) == VAR_DECL
|| TREE_CODE (var
) == PARM_DECL
)
254 && ! TREE_STATIC (var
))
255 || TREE_CODE (var
) == LABEL_DECL
256 || TREE_CODE (var
) == RESULT_DECL
));
259 /* lang_hooks.tree_inlining.copy_res_decl_for_inlining should return a
260 declaration for the result RES of function FN to be inlined into
261 CALLER. NDP points to an integer that should be set in case a new
262 declaration wasn't created (presumably because RES was of aggregate
263 type, such that a TARGET_EXPR is used for the result). TEXPS is a
264 pointer to a varray with the stack of TARGET_EXPRs seen while
265 inlining functions into caller; the top of TEXPS is supposed to
269 lhd_tree_inlining_copy_res_decl_for_inlining (res
, fn
, caller
,
271 tree res
, fn
, caller
;
272 void *dm ATTRIBUTE_UNUSED
;
273 int *ndp ATTRIBUTE_UNUSED
;
274 void *texps ATTRIBUTE_UNUSED
;
276 return copy_decl_for_inlining (res
, fn
, caller
);
279 /* lang_hooks.tree_inlining.anon_aggr_type_p determines whether T is a
280 type node representing an anonymous aggregate (union, struct, etc),
281 i.e., one whose members are in the same scope as the union itself. */
284 lhd_tree_inlining_anon_aggr_type_p (t
)
285 tree t ATTRIBUTE_UNUSED
;
290 /* lang_hooks.tree_inlining.start_inlining and end_inlining perform any
291 language-specific bookkeeping necessary for processing
292 FN. start_inlining returns non-zero if inlining should proceed, zero if
295 For instance, the C++ version keeps track of template instantiations to
296 avoid infinite recursion. */
299 lhd_tree_inlining_start_inlining (fn
)
300 tree fn ATTRIBUTE_UNUSED
;
306 lhd_tree_inlining_end_inlining (fn
)
307 tree fn ATTRIBUTE_UNUSED
;
311 /* lang_hooks.tree_inlining.convert_parm_for_inlining performs any
312 language-specific conversion before assigning VALUE to PARM. */
315 lhd_tree_inlining_convert_parm_for_inlining (parm
, value
, fndecl
)
316 tree parm ATTRIBUTE_UNUSED
;
318 tree fndecl ATTRIBUTE_UNUSED
;
323 /* lang_hooks.tree_dump.dump_tree: Dump language-specific parts of tree
324 nodes. Returns non-zero if it does not want the usual dumping of the
328 lhd_tree_dump_dump_tree (di
, t
)
329 void *di ATTRIBUTE_UNUSED
;
330 tree t ATTRIBUTE_UNUSED
;
335 /* lang_hooks.tree_dump.type_qual: Determine type qualifiers in a
336 language-specific way. */
339 lhd_tree_dump_type_quals (t
)
342 return TYPE_QUALS (t
);