1 /* Default language-specific hooks.
2 Copyright 2001 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. */
42 /* Do nothing (return the tree node passed). */
51 /* Do nothing; the default hook to decode an option. */
54 lhd_decode_option (argc
, argv
)
55 int argc ATTRIBUTE_UNUSED
;
56 char **argv ATTRIBUTE_UNUSED
;
61 /* Called from by print-tree.c. */
64 lhd_print_tree_nothing (file
, node
, indent
)
65 FILE *file ATTRIBUTE_UNUSED
;
66 tree node ATTRIBUTE_UNUSED
;
67 int indent ATTRIBUTE_UNUSED
;
71 /* Called from safe_from_p. */
74 lhd_safe_from_p (x
, exp
)
75 rtx x ATTRIBUTE_UNUSED
;
76 tree exp ATTRIBUTE_UNUSED
;
81 /* Called from staticp. */
85 tree exp ATTRIBUTE_UNUSED
;
90 /* Called when -dy is given on the command line. */
93 lhd_set_yydebug (value
)
97 fprintf (stderr
, "warning: no yacc/bison-generated output to debug!\n");
100 /* Provide a default routine to clear the binding stack. This is used
101 by languages that don't need to do anything special. */
103 lhd_clear_binding_stack ()
105 while (! global_bindings_p ())
109 /* Provide a default routine for alias sets that always returns -1. This
110 is used by languages that don't need to do anything special. */
113 lhd_get_alias_set (t
)
114 tree t ATTRIBUTE_UNUSED
;
119 /* Provide a hook routine for alias sets that always returns 0. This is
120 used by languages that haven't deal with alias sets yet. */
123 hook_get_alias_set_0 (t
)
124 tree t ATTRIBUTE_UNUSED
;
129 /* lang_hooks.tree_inlining.walk_subtrees is called by walk_tree()
130 after handling common cases, but before walking code-specific
131 sub-trees. If this hook is overridden for a language, it should
132 handle language-specific tree codes, as well as language-specific
133 information associated to common tree codes. If a tree node is
134 completely handled within this function, it should set *SUBTREES to
135 0, so that generic handling isn't attempted. For language-specific
136 tree codes, generic handling would abort(), so make sure it is set
137 properly. Both SUBTREES and *SUBTREES is guaranteed to be non-zero
138 when the function is called. */
141 lhd_tree_inlining_walk_subtrees (tp
,subtrees
,func
,data
,htab
)
142 tree
*tp ATTRIBUTE_UNUSED
;
143 int *subtrees ATTRIBUTE_UNUSED
;
144 walk_tree_fn func ATTRIBUTE_UNUSED
;
145 void *data ATTRIBUTE_UNUSED
;
146 void *htab ATTRIBUTE_UNUSED
;
151 /* lang_hooks.tree_inlining.cannot_inline_tree_fn is called to
152 determine whether there are language-specific reasons for not
153 inlining a given function. */
156 lhd_tree_inlining_cannot_inline_tree_fn (fnp
)
160 && lookup_attribute ("always_inline", DECL_ATTRIBUTES (*fnp
)) == NULL
)
166 /* lang_hooks.tree_inlining.disregard_inline_limits is called to
167 determine whether a function should be considered for inlining even
168 if it would exceed inlining limits. */
171 lhd_tree_inlining_disregard_inline_limits (fn
)
174 if (lookup_attribute ("always_inline", DECL_ATTRIBUTES (fn
)) != NULL
)
180 /* lang_hooks.tree_inlining.add_pending_fn_decls is called before
181 starting to inline a function, to push any language-specific
182 functions that should not be inlined into the current function,
183 into VAFNP. PFN is the top of varray, and should be returned if no
184 functions are pushed into VAFNP. The top of the varray should be
188 lhd_tree_inlining_add_pending_fn_decls (vafnp
, pfn
)
189 void *vafnp ATTRIBUTE_UNUSED
;
195 /* lang_hooks.tree_inlining.tree_chain_matters_p indicates whether the
196 TREE_CHAIN of a language-specific tree node is relevant, i.e.,
197 whether it should be walked, copied and preserved across copies. */
200 lhd_tree_inlining_tree_chain_matters_p (t
)
201 tree t ATTRIBUTE_UNUSED
;
206 /* lang_hooks.tree_inlining.auto_var_in_fn_p is called to determine
207 whether VT is an automatic variable defined in function FT. */
210 lhd_tree_inlining_auto_var_in_fn_p (var
, fn
)
213 return (DECL_P (var
) && DECL_CONTEXT (var
) == fn
214 && (((TREE_CODE (var
) == VAR_DECL
|| TREE_CODE (var
) == PARM_DECL
)
215 && ! TREE_STATIC (var
))
216 || TREE_CODE (var
) == LABEL_DECL
217 || TREE_CODE (var
) == RESULT_DECL
));
220 /* lang_hooks.tree_inlining.copy_res_decl_for_inlining should return a
221 declaration for the result RES of function FN to be inlined into
222 CALLER. NDP points to an integer that should be set in case a new
223 declaration wasn't created (presumably because RES was of aggregate
224 type, such that a TARGET_EXPR is used for the result). TEXPS is a
225 pointer to a varray with the stack of TARGET_EXPRs seen while
226 inlining functions into caller; the top of TEXPS is supposed to
230 lhd_tree_inlining_copy_res_decl_for_inlining (res
, fn
, caller
,
232 tree res
, fn
, caller
;
233 void *dm ATTRIBUTE_UNUSED
;
234 int *ndp ATTRIBUTE_UNUSED
;
235 void *texps ATTRIBUTE_UNUSED
;
237 return copy_decl_for_inlining (res
, fn
, caller
);
240 /* lang_hooks.tree_inlining.anon_aggr_type_p determines whether T is a
241 type node representing an anonymous aggregate (union, struct, etc),
242 i.e., one whose members are in the same scope as the union itself. */
245 lhd_tree_inlining_anon_aggr_type_p (t
)
246 tree t ATTRIBUTE_UNUSED
;
251 /* lang_hooks.tree_inlining.start_inlining and end_inlining perform any
252 language-specific bookkeeping necessary for processing
253 FN. start_inlining returns non-zero if inlining should proceed, zero if
256 For instance, the C++ version keeps track of template instantiations to
257 avoid infinite recursion. */
260 lhd_tree_inlining_start_inlining (fn
)
261 tree fn ATTRIBUTE_UNUSED
;
267 lhd_tree_inlining_end_inlining (fn
)
268 tree fn ATTRIBUTE_UNUSED
;
272 /* lang_hooks.tree_dump.dump_tree: Dump language-specific parts of tree
273 nodes. Returns non-zero if it does not want the usual dumping of the
277 lhd_tree_dump_dump_tree (di
, t
)
278 void *di ATTRIBUTE_UNUSED
;
279 tree t ATTRIBUTE_UNUSED
;
284 /* lang_hooks.tree_dump.type_qual: Determine type qualifiers in a
285 language-specific way. */
288 lhd_tree_dump_type_quals (t
)
291 return TYPE_QUALS (t
);