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 unsafe_for_reeval. */
101 lhd_unsafe_for_reeval (t)
102 tree t ATTRIBUTE_UNUSED;
107 /* Called from staticp. */
111 tree exp ATTRIBUTE_UNUSED;
116 /* Called from check_global_declarations. */
119 lhd_warn_unused_global_decl (decl)
122 /* This is what used to exist in check_global_declarations. Probably
123 not many of these actually apply to non-C languages. */
125 if (TREE_CODE (decl) == FUNCTION_DECL && DECL_INLINE (decl))
127 if (TREE_CODE (decl) == VAR_DECL && TREE_READONLY (decl))
129 if (DECL_IN_SYSTEM_HEADER (decl))
135 /* Called when -dy is given on the command line. */
138 lhd_set_yydebug (value)
142 fprintf (stderr, "warning: no yacc/bison-generated output to debug!\n");
145 /* Set the DECL_ASSEMBLER_NAME for DECL. */
147 lhd_set_decl_assembler_name (decl)
150 /* The language-independent code should never use the
151 DECL_ASSEMBLER_NAME for lots of DECLs. Only FUNCTION_DECLs and
152 VAR_DECLs for variables with static storage duration need a real
153 DECL_ASSEMBLER_NAME. */
154 if (TREE_CODE (decl) == FUNCTION_DECL
155 || (TREE_CODE (decl) == VAR_DECL
156 && (TREE_STATIC (decl)
157 || DECL_EXTERNAL (decl)
158 || TREE_PUBLIC (decl))))
159 /* By default, assume the name to use in assembly code is the
160 same as that used in the source language. (That's correct
161 for C, and GCC used to set DECL_ASSEMBLER_NAME to the same
162 value as DECL_NAME in build_decl, so this choice provides
163 backwards compatibility with existing front-ends. */
164 SET_DECL_ASSEMBLER_NAME (decl, DECL_NAME (decl));
166 /* Nobody should ever be asking for the DECL_ASSEMBLER_NAME of
167 these DECLs -- unless they're in language-dependent code, in
168 which case set_decl_assembler_name hook should handle things. */
172 /* Provide a default routine to clear the binding stack. This is used
173 by languages that don't need to do anything special. */
175 lhd_clear_binding_stack ()
177 while (! (*lang_hooks.decls.global_bindings_p) ())
181 /* Invalid use of an incomplete type. */
183 lhd_incomplete_type_error (value, type)
184 tree value ATTRIBUTE_UNUSED, type;
186 if (TREE_CODE (type) == ERROR_MARK)
192 /* Provide a default routine for alias sets that always returns -1. This
193 is used by languages that don't need to do anything special. */
196 lhd_get_alias_set (t)
197 tree t ATTRIBUTE_UNUSED;
202 /* Provide a hook routine for alias sets that always returns 0. This is
203 used by languages that haven't deal with alias sets yet. */
206 hook_get_alias_set_0 (t)
207 tree t ATTRIBUTE_UNUSED;
212 /* This is the default expand_expr function. */
215 lhd_expand_expr (t, r, mm, em)
216 tree t ATTRIBUTE_UNUSED;
217 rtx r ATTRIBUTE_UNUSED;
218 enum machine_mode mm ATTRIBUTE_UNUSED;
219 int em ATTRIBUTE_UNUSED;
224 /* This is the default decl_printable_name function. */
227 lhd_decl_printable_name (decl, verbosity)
229 int verbosity ATTRIBUTE_UNUSED;
231 return IDENTIFIER_POINTER (DECL_NAME (decl));
234 /* lang_hooks.tree_inlining.walk_subtrees is called by walk_tree()
235 after handling common cases, but before walking code-specific
236 sub-trees. If this hook is overridden for a language, it should
237 handle language-specific tree codes, as well as language-specific
238 information associated to common tree codes. If a tree node is
239 completely handled within this function, it should set *SUBTREES to
240 0, so that generic handling isn't attempted. For language-specific
241 tree codes, generic handling would abort(), so make sure it is set
242 properly. Both SUBTREES and *SUBTREES is guaranteed to be non-zero
243 when the function is called. */
246 lhd_tree_inlining_walk_subtrees (tp,subtrees,func,data,htab)
247 tree *tp ATTRIBUTE_UNUSED;
248 int *subtrees ATTRIBUTE_UNUSED;
249 walk_tree_fn func ATTRIBUTE_UNUSED;
250 void *data ATTRIBUTE_UNUSED;
251 void *htab ATTRIBUTE_UNUSED;
256 /* lang_hooks.tree_inlining.cannot_inline_tree_fn is called to
257 determine whether there are language-specific reasons for not
258 inlining a given function. */
261 lhd_tree_inlining_cannot_inline_tree_fn (fnp)
264 if (flag_really_no_inline
265 && lookup_attribute ("always_inline", DECL_ATTRIBUTES (*fnp)) == NULL)
271 /* lang_hooks.tree_inlining.disregard_inline_limits is called to
272 determine whether a function should be considered for inlining even
273 if it would exceed inlining limits. */
276 lhd_tree_inlining_disregard_inline_limits (fn)
279 if (lookup_attribute ("always_inline", DECL_ATTRIBUTES (fn)) != NULL)
285 /* lang_hooks.tree_inlining.add_pending_fn_decls is called before
286 starting to inline a function, to push any language-specific
287 functions that should not be inlined into the current function,
288 into VAFNP. PFN is the top of varray, and should be returned if no
289 functions are pushed into VAFNP. The top of the varray should be
293 lhd_tree_inlining_add_pending_fn_decls (vafnp, pfn)
294 void *vafnp ATTRIBUTE_UNUSED;
300 /* lang_hooks.tree_inlining.tree_chain_matters_p indicates whether the
301 TREE_CHAIN of a language-specific tree node is relevant, i.e.,
302 whether it should be walked, copied and preserved across copies. */
305 lhd_tree_inlining_tree_chain_matters_p (t)
306 tree t ATTRIBUTE_UNUSED;
311 /* lang_hooks.tree_inlining.auto_var_in_fn_p is called to determine
312 whether VT is an automatic variable defined in function FT. */
315 lhd_tree_inlining_auto_var_in_fn_p (var, fn)
318 return (DECL_P (var) && DECL_CONTEXT (var) == fn
319 && (((TREE_CODE (var) == VAR_DECL || TREE_CODE (var) == PARM_DECL)
320 && ! TREE_STATIC (var))
321 || TREE_CODE (var) == LABEL_DECL
322 || TREE_CODE (var) == RESULT_DECL));
325 /* lang_hooks.tree_inlining.copy_res_decl_for_inlining should return a
326 declaration for the result RES of function FN to be inlined into
327 CALLER. NDP points to an integer that should be set in case a new
328 declaration wasn't created (presumably because RES was of aggregate
329 type, such that a TARGET_EXPR is used for the result). TEXPS is a
330 pointer to a varray with the stack of TARGET_EXPRs seen while
331 inlining functions into caller; the top of TEXPS is supposed to
335 lhd_tree_inlining_copy_res_decl_for_inlining (res, fn, caller,
337 tree res, fn, caller;
338 void *dm ATTRIBUTE_UNUSED;
339 int *ndp ATTRIBUTE_UNUSED;
340 void *texps ATTRIBUTE_UNUSED;
342 return copy_decl_for_inlining (res, fn, caller);
345 /* lang_hooks.tree_inlining.anon_aggr_type_p determines whether T is a
346 type node representing an anonymous aggregate (union, struct, etc),
347 i.e., one whose members are in the same scope as the union itself. */
350 lhd_tree_inlining_anon_aggr_type_p (t)
351 tree t ATTRIBUTE_UNUSED;
356 /* lang_hooks.tree_inlining.start_inlining and end_inlining perform any
357 language-specific bookkeeping necessary for processing
358 FN. start_inlining returns non-zero if inlining should proceed, zero if
361 For instance, the C++ version keeps track of template instantiations to
362 avoid infinite recursion. */
365 lhd_tree_inlining_start_inlining (fn)
366 tree fn ATTRIBUTE_UNUSED;
372 lhd_tree_inlining_end_inlining (fn)
373 tree fn ATTRIBUTE_UNUSED;
377 /* lang_hooks.tree_inlining.convert_parm_for_inlining performs any
378 language-specific conversion before assigning VALUE to PARM. */
381 lhd_tree_inlining_convert_parm_for_inlining (parm, value, fndecl)
382 tree parm ATTRIBUTE_UNUSED;
384 tree fndecl ATTRIBUTE_UNUSED;
389 /* lang_hooks.tree_dump.dump_tree: Dump language-specific parts of tree
390 nodes. Returns non-zero if it does not want the usual dumping of the
394 lhd_tree_dump_dump_tree (di, t)
395 void *di ATTRIBUTE_UNUSED;
396 tree t ATTRIBUTE_UNUSED;
401 /* lang_hooks.tree_dump.type_qual: Determine type qualifiers in a
402 language-specific way. */
405 lhd_tree_dump_type_quals (t)
408 return TYPE_QUALS (t);