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"
31 #include "langhooks.h"
32 #include "langhooks-def.h"
34 /* Do nothing; in many cases the default hook. */
41 /* Do nothing (return the tree node passed). */
50 /* Do nothing; the default hook to decode an option. */
53 lhd_decode_option (argc
, argv
)
54 int argc ATTRIBUTE_UNUSED
;
55 char **argv ATTRIBUTE_UNUSED
;
60 /* Called from by print-tree.c. */
63 lhd_print_tree_nothing (file
, node
, indent
)
64 FILE *file ATTRIBUTE_UNUSED
;
65 tree node ATTRIBUTE_UNUSED
;
66 int indent ATTRIBUTE_UNUSED
;
70 /* Called from safe_from_p. */
73 lhd_safe_from_p (x
, exp
)
74 rtx x ATTRIBUTE_UNUSED
;
75 tree exp ATTRIBUTE_UNUSED
;
80 /* Called from staticp. */
89 /* Called when -dy is given on the command line. */
92 lhd_set_yydebug (value
)
96 fprintf (stderr
, "warning: no yacc/bison-generated output to debug!\n");
99 /* Provide a default routine to clear the binding stack. This is used
100 by languages that don't need to do anything special. */
102 lhd_clear_binding_stack ()
104 while (! global_bindings_p ())
108 /* Provide a default routine for alias sets that always returns -1. This
109 is used by languages that don't need to do anything special. */
112 lhd_get_alias_set (t
)
113 tree t ATTRIBUTE_UNUSED
;
118 /* Provide a hook routine for alias sets that always returns 0. This is
119 used by languages that haven't deal with alias sets yet. */
122 hook_get_alias_set_0 (t
)
123 tree t ATTRIBUTE_UNUSED
;
128 /* lang_hooks.tree_inlining.walk_subtrees is called by walk_tree()
129 after handling common cases, but before walking code-specific
130 sub-trees. If this hook is overridden for a language, it should
131 handle language-specific tree codes, as well as language-specific
132 information associated to common tree codes. If a tree node is
133 completely handled within this function, it should set *SUBTREES to
134 0, so that generic handling isn't attempted. For language-specific
135 tree codes, generic handling would abort(), so make sure it is set
136 properly. Both SUBTREES and *SUBTREES is guaranteed to be non-zero
137 when the function is called. */
140 lhd_tree_inlining_walk_subtrees (tp
,subtrees
,func
,data
,htab
)
141 tree
*tp ATTRIBUTE_UNUSED
;
142 int *subtrees ATTRIBUTE_UNUSED
;
143 walk_tree_fn func ATTRIBUTE_UNUSED
;
144 void *data ATTRIBUTE_UNUSED
;
145 void *htab ATTRIBUTE_UNUSED
;
150 /* lang_hooks.tree_inlining.cannot_inline_tree_fn is called to
151 determine whether there are language-specific reasons for not
152 inlining a given function. */
155 lhd_tree_inlining_cannot_inline_tree_fn (fnp
)
156 tree
*fnp ATTRIBUTE_UNUSED
;
161 /* lang_hooks.tree_inlining.disregard_inline_limits is called to
162 determine whether a function should be considered for inlining even
163 if it would exceed inlining limits. */
166 lhd_tree_inlining_disregard_inline_limits (fn
)
167 tree fn ATTRIBUTE_UNUSED
;
172 /* lang_hooks.tree_inlining.add_pending_fn_decls is called before
173 starting to inline a function, to push any language-specific
174 functions that should not be inlined into the current function,
175 into VAFNP. PFN is the top of varray, and should be returned if no
176 functions are pushed into VAFNP. The top of the varray should be
180 lhd_tree_inlining_add_pending_fn_decls (vafnp
, pfn
)
181 void *vafnp ATTRIBUTE_UNUSED
;
187 /* lang_hooks.tree_inlining.tree_chain_matters_p indicates whether the
188 TREE_CHAIN of a language-specific tree node is relevant, i.e.,
189 whether it should be walked, copied and preserved across copies. */
192 lhd_tree_inlining_tree_chain_matters_p (t
)
193 tree t ATTRIBUTE_UNUSED
;
198 /* lang_hooks.tree_inlining.auto_var_in_fn_p is called to determine
199 whether VT is an automatic variable defined in function FT. */
202 lhd_tree_inlining_auto_var_in_fn_p (var
, fn
)
205 return (DECL_P (var
) && DECL_CONTEXT (var
) == fn
206 && (((TREE_CODE (var
) == VAR_DECL
|| TREE_CODE (var
) == PARM_DECL
)
207 && ! TREE_STATIC (var
))
208 || TREE_CODE (var
) == LABEL_DECL
209 || TREE_CODE (var
) == RESULT_DECL
));
212 /* lang_hooks.tree_inlining.copy_res_decl_for_inlining should return a
213 declaration for the result RES of function FN to be inlined into
214 CALLER. NDP points to an integer that should be set in case a new
215 declaration wasn't created (presumably because RES was of aggregate
216 type, such that a TARGET_EXPR is used for the result). TEXPS is a
217 pointer to a varray with the stack of TARGET_EXPRs seen while
218 inlining functions into caller; the top of TEXPS is supposed to
222 lhd_tree_inlining_copy_res_decl_for_inlining (res
, fn
, caller
,
224 tree res
, fn
, caller
;
225 void *dm ATTRIBUTE_UNUSED
;
226 int *ndp ATTRIBUTE_UNUSED
;
227 void *texps ATTRIBUTE_UNUSED
;
229 return copy_decl_for_inlining (res
, fn
, caller
);
232 /* lang_hooks.tree_inlining.anon_aggr_type_p determines whether T is a
233 type node representing an anonymous aggregate (union, struct, etc),
234 i.e., one whose members are in the same scope as the union itself. */
237 lhd_tree_inlining_anon_aggr_type_p (t
)
238 tree t ATTRIBUTE_UNUSED
;
243 /* lang_hooks.tree_inlining.start_inlining and end_inlining perform any
244 language-specific bookkeeping necessary for processing
245 FN. start_inlining returns non-zero if inlining should proceed, zero if
248 For instance, the C++ version keeps track of template instantiations to
249 avoid infinite recursion. */
252 lhd_tree_inlining_start_inlining (fn
)
253 tree fn ATTRIBUTE_UNUSED
;
259 lhd_tree_inlining_end_inlining (fn
)
260 tree fn ATTRIBUTE_UNUSED
;
264 /* lang_hooks.tree_dump.dump_tree: Dump language-specific parts of tree
265 nodes. Returns non-zero if it does not want the usual dumping of the
269 lhd_tree_dump_dump_tree (di
, t
)
270 void *di ATTRIBUTE_UNUSED
;
271 tree t ATTRIBUTE_UNUSED
;
276 /* lang_hooks.tree_dump.type_qual: Determine type qualifiers in a
277 language-specific way. */
280 lhd_tree_dump_type_quals (t
)
283 return TYPE_QUALS (t
);