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. */
26 #include "tree-inline.h"
28 #include "insn-config.h"
29 #include "integrate.h"
30 #include "langhooks.h"
31 #include "langhooks-def.h"
33 /* Do nothing; in many cases the default hook. */
40 /* Do nothing; the default hook to decode an option. */
43 lhd_decode_option (argc
, argv
)
44 int argc ATTRIBUTE_UNUSED
;
45 char **argv ATTRIBUTE_UNUSED
;
50 /* Provide a default routine to clear the binding stack. This is used
51 by languages that don't need to do anything special. */
53 lhd_clear_binding_stack ()
55 while (! global_bindings_p ())
59 /* Provide a default routine for alias sets that always returns -1. This
60 is used by languages that don't need to do anything special. */
64 tree t ATTRIBUTE_UNUSED
;
69 /* Provide a hook routine for alias sets that always returns 0. This is
70 used by languages that haven't deal with alias sets yet. */
73 hook_get_alias_set_0 (t
)
74 tree t ATTRIBUTE_UNUSED
;
79 /* lang_hooks.tree_inlining.walk_subtrees is called by walk_tree()
80 after handling common cases, but before walking code-specific
81 sub-trees. If this hook is overridden for a language, it should
82 handle language-specific tree codes, as well as language-specific
83 information associated to common tree codes. If a tree node is
84 completely handled within this function, it should set *SUBTREES to
85 0, so that generic handling isn't attempted. For language-specific
86 tree codes, generic handling would abort(), so make sure it is set
87 properly. Both SUBTREES and *SUBTREES is guaranteed to be non-zero
88 when the function is called. */
91 lhd_tree_inlining_walk_subtrees (tp
,subtrees
,func
,data
,htab
)
92 tree
*tp ATTRIBUTE_UNUSED
;
93 int *subtrees ATTRIBUTE_UNUSED
;
94 walk_tree_fn func ATTRIBUTE_UNUSED
;
95 void *data ATTRIBUTE_UNUSED
;
96 void *htab ATTRIBUTE_UNUSED
;
101 /* lang_hooks.tree_inlining.cannot_inline_tree_fn is called to
102 determine whether there are language-specific reasons for not
103 inlining a given function. */
106 lhd_tree_inlining_cannot_inline_tree_fn (fnp
)
107 tree
*fnp ATTRIBUTE_UNUSED
;
112 /* lang_hooks.tree_inlining.disregard_inline_limits is called to
113 determine whether a function should be considered for inlining even
114 if it would exceed inlining limits. */
117 lhd_tree_inlining_disregard_inline_limits (fn
)
118 tree fn ATTRIBUTE_UNUSED
;
123 /* lang_hooks.tree_inlining.add_pending_fn_decls is called before
124 starting to inline a function, to push any language-specific
125 functions that should not be inlined into the current function,
126 into VAFNP. PFN is the top of varray, and should be returned if no
127 functions are pushed into VAFNP. The top of the varray should be
131 lhd_tree_inlining_add_pending_fn_decls (vafnp
, pfn
)
132 void *vafnp ATTRIBUTE_UNUSED
;
138 /* lang_hooks.tree_inlining.tree_chain_matters_p indicates whether the
139 TREE_CHAIN of a language-specific tree node is relevant, i.e.,
140 whether it should be walked, copied and preserved across copies. */
143 lhd_tree_inlining_tree_chain_matters_p (t
)
144 tree t ATTRIBUTE_UNUSED
;
149 /* lang_hooks.tree_inlining.auto_var_in_fn_p is called to determine
150 whether VT is an automatic variable defined in function FT. */
153 lhd_tree_inlining_auto_var_in_fn_p (var
, fn
)
156 return (DECL_P (var
) && DECL_CONTEXT (var
) == fn
157 && (((TREE_CODE (var
) == VAR_DECL
|| TREE_CODE (var
) == PARM_DECL
)
158 && ! TREE_STATIC (var
))
159 || TREE_CODE (var
) == LABEL_DECL
160 || TREE_CODE (var
) == RESULT_DECL
));
163 /* lang_hooks.tree_inlining.copy_res_decl_for_inlining should return a
164 declaration for the result RES of function FN to be inlined into
165 CALLER. NDP points to an integer that should be set in case a new
166 declaration wasn't created (presumably because RES was of aggregate
167 type, such that a TARGET_EXPR is used for the result). TEXPS is a
168 pointer to a varray with the stack of TARGET_EXPRs seen while
169 inlining functions into caller; the top of TEXPS is supposed to
173 lhd_tree_inlining_copy_res_decl_for_inlining (res
, fn
, caller
,
175 tree res
, fn
, caller
;
176 void *dm ATTRIBUTE_UNUSED
;
177 int *ndp ATTRIBUTE_UNUSED
;
178 void *texps ATTRIBUTE_UNUSED
;
180 return copy_decl_for_inlining (res
, fn
, caller
);
183 /* lang_hooks.tree_inlining.anon_aggr_type_p determines whether T is a
184 type node representing an anonymous aggregate (union, struct, etc),
185 i.e., one whose members are in the same scope as the union itself. */
188 lhd_tree_inlining_anon_aggr_type_p (t
)
189 tree t ATTRIBUTE_UNUSED
;