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"
32 /* Do nothing; in many cases the default hook. */
35 lang_hook_default_do_nothing ()
39 /* Do nothing; the default hook to decode an option. */
42 lang_hook_default_decode_option (argc
, argv
)
43 int argc ATTRIBUTE_UNUSED
;
44 char **argv ATTRIBUTE_UNUSED
;
49 /* Provide a default routine to clear the binding stack. This is used
50 by languages that don't need to do anything special. */
52 lang_hook_default_clear_binding_stack ()
54 while (! global_bindings_p ())
58 /* Provide a default routine for alias sets that always returns -1. This
59 is used by languages that don't need to do anything special. */
62 lang_hook_default_get_alias_set (t
)
63 tree t ATTRIBUTE_UNUSED
;
68 /* Provide a hook routine for alias sets that always returns 0. This is
69 used by languages that haven't deal with alias sets yet. */
72 hook_get_alias_set_0 (t
)
73 tree t ATTRIBUTE_UNUSED
;
78 /* lang_hooks.tree_inlining.walk_subtrees is called by walk_tree()
79 after handling common cases, but before walking code-specific
80 sub-trees. If this hook is overridden for a language, it should
81 handle language-specific tree codes, as well as language-specific
82 information associated to common tree codes. If a tree node is
83 completely handled within this function, it should set *SUBTREES to
84 0, so that generic handling isn't attempted. For language-specific
85 tree codes, generic handling would abort(), so make sure it is set
86 properly. Both SUBTREES and *SUBTREES is guaranteed to be non-zero
87 when the function is called. */
90 tree_inlining_default_hook_walk_subtrees (tp
,subtrees
,func
,data
,htab
)
91 tree
*tp ATTRIBUTE_UNUSED
;
92 int *subtrees ATTRIBUTE_UNUSED
;
93 walk_tree_fn func ATTRIBUTE_UNUSED
;
94 void *data ATTRIBUTE_UNUSED
;
95 void *htab ATTRIBUTE_UNUSED
;
100 /* lang_hooks.tree_inlining.cannot_inline_tree_fn is called to
101 determine whether there are language-specific reasons for not
102 inlining a given function. */
105 tree_inlining_default_hook_cannot_inline_tree_fn (fnp
)
106 tree
*fnp ATTRIBUTE_UNUSED
;
111 /* lang_hooks.tree_inlining.disregard_inline_limits is called to
112 determine whether a function should be considered for inlining even
113 if it would exceed inlining limits. */
116 tree_inlining_default_hook_disregard_inline_limits (fn
)
117 tree fn ATTRIBUTE_UNUSED
;
122 /* lang_hooks.tree_inlining.add_pending_fn_decls is called before
123 starting to inline a function, to push any language-specific
124 functions that should not be inlined into the current function,
125 into VAFNP. PFN is the top of varray, and should be returned if no
126 functions are pushed into VAFNP. The top of the varray should be
130 tree_inlining_default_hook_add_pending_fn_decls (vafnp
, pfn
)
131 void *vafnp ATTRIBUTE_UNUSED
;
137 /* lang_hooks.tree_inlining.tree_chain_matters_p indicates whether the
138 TREE_CHAIN of a language-specific tree node is relevant, i.e.,
139 whether it should be walked, copied and preserved across copies. */
142 tree_inlining_default_hook_tree_chain_matters_p (t
)
143 tree t ATTRIBUTE_UNUSED
;
148 /* lang_hooks.tree_inlining.auto_var_in_fn_p is called to determine
149 whether VT is an automatic variable defined in function FT. */
152 tree_inlining_default_hook_auto_var_in_fn_p (var
, fn
)
155 return (DECL_P (var
) && DECL_CONTEXT (var
) == fn
156 && (((TREE_CODE (var
) == VAR_DECL
|| TREE_CODE (var
) == PARM_DECL
)
157 && ! TREE_STATIC (var
))
158 || TREE_CODE (var
) == LABEL_DECL
159 || TREE_CODE (var
) == RESULT_DECL
));
162 /* lang_hooks.tree_inlining.copy_res_decl_for_inlining should return a
163 declaration for the result RES of function FN to be inlined into
164 CALLER. NDP points to an integer that should be set in case a new
165 declaration wasn't created (presumably because RES was of aggregate
166 type, such that a TARGET_EXPR is used for the result). TEXPS is a
167 pointer to a varray with the stack of TARGET_EXPRs seen while
168 inlining functions into caller; the top of TEXPS is supposed to
172 tree_inlining_default_hook_copy_res_decl_for_inlining (res
, fn
, caller
,
174 tree res
, fn
, caller
;
175 void *dm ATTRIBUTE_UNUSED
;
176 int *ndp ATTRIBUTE_UNUSED
;
177 void *texps ATTRIBUTE_UNUSED
;
179 return copy_decl_for_inlining (res
, fn
, caller
);
182 /* lang_hooks.tree_inlining.anon_aggr_type_p determines whether T is a
183 type node representing an anonymous aggregate (union, struct, etc),
184 i.e., one whose members are in the same scope as the union itself. */
187 tree_inlining_default_hook_anon_aggr_type_p (t
)
188 tree t ATTRIBUTE_UNUSED
;