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 GCC.
7 GCC 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 GCC 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 GCC; see the file COPYING. If not, write to
19 the Free Software Foundation, 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA. */
24 #include "coretypes.h"
29 #include "tree-inline.h"
31 #include "insn-config.h"
32 #include "integrate.h"
34 #include "langhooks.h"
35 #include "langhooks-def.h"
37 /* Do nothing; in many cases the default hook. */
44 /* Do nothing (tree). */
48 tree t ATTRIBUTE_UNUSED;
52 /* Do nothing (int). */
56 int i ATTRIBUTE_UNUSED;
60 /* Do nothing (function). */
64 struct function *f ATTRIBUTE_UNUSED;
68 /* Do nothing (return the tree node passed). */
77 /* Do nothing (return NULL_TREE). */
80 lhd_return_null_tree (t)
81 tree t ATTRIBUTE_UNUSED;
86 /* The default post options hook. */
89 lhd_post_options (pfilename)
90 const char **pfilename ATTRIBUTE_UNUSED;
95 /* Called from by print-tree.c. */
98 lhd_print_tree_nothing (file, node, indent)
99 FILE *file ATTRIBUTE_UNUSED;
100 tree node ATTRIBUTE_UNUSED;
101 int indent ATTRIBUTE_UNUSED;
105 /* Called from safe_from_p. */
108 lhd_safe_from_p (x, exp)
109 rtx x ATTRIBUTE_UNUSED;
110 tree exp ATTRIBUTE_UNUSED;
115 /* Called from unsafe_for_reeval. */
118 lhd_unsafe_for_reeval (t)
119 tree t ATTRIBUTE_UNUSED;
124 /* Called from staticp. */
128 tree exp ATTRIBUTE_UNUSED;
133 /* Called from check_global_declarations. */
136 lhd_warn_unused_global_decl (decl)
139 /* This is what used to exist in check_global_declarations. Probably
140 not many of these actually apply to non-C languages. */
142 if (TREE_CODE (decl) == FUNCTION_DECL && DECL_INLINE (decl))
144 if (TREE_CODE (decl) == VAR_DECL && TREE_READONLY (decl))
146 if (DECL_IN_SYSTEM_HEADER (decl))
152 /* Set the DECL_ASSEMBLER_NAME for DECL. */
154 lhd_set_decl_assembler_name (decl)
157 /* The language-independent code should never use the
158 DECL_ASSEMBLER_NAME for lots of DECLs. Only FUNCTION_DECLs and
159 VAR_DECLs for variables with static storage duration need a real
160 DECL_ASSEMBLER_NAME. */
161 if (TREE_CODE (decl) == FUNCTION_DECL
162 || (TREE_CODE (decl) == VAR_DECL
163 && (TREE_STATIC (decl)
164 || DECL_EXTERNAL (decl)
165 || TREE_PUBLIC (decl))))
166 /* By default, assume the name to use in assembly code is the
167 same as that used in the source language. (That's correct
168 for C, and GCC used to set DECL_ASSEMBLER_NAME to the same
169 value as DECL_NAME in build_decl, so this choice provides
170 backwards compatibility with existing front-ends. */
171 SET_DECL_ASSEMBLER_NAME (decl, DECL_NAME (decl));
173 /* Nobody should ever be asking for the DECL_ASSEMBLER_NAME of
174 these DECLs -- unless they're in language-dependent code, in
175 which case set_decl_assembler_name hook should handle things. */
179 /* By default we always allow bit-field based optimizations. */
181 lhd_can_use_bit_fields_p ()
186 /* Provide a default routine to clear the binding stack. This is used
187 by languages that don't need to do anything special. */
189 lhd_clear_binding_stack ()
191 while (! (*lang_hooks.decls.global_bindings_p) ())
195 /* Type promotion for variable arguments. */
197 lhd_type_promotes_to (type)
198 tree type ATTRIBUTE_UNUSED;
203 /* Invalid use of an incomplete type. */
205 lhd_incomplete_type_error (value, type)
206 tree value ATTRIBUTE_UNUSED, type;
208 if (TREE_CODE (type) == ERROR_MARK)
214 /* Provide a default routine for alias sets that always returns -1. This
215 is used by languages that don't need to do anything special. */
218 lhd_get_alias_set (t)
219 tree t ATTRIBUTE_UNUSED;
224 /* Provide a hook routine for alias sets that always returns 0. This is
225 used by languages that haven't deal with alias sets yet. */
228 hook_get_alias_set_0 (t)
229 tree t ATTRIBUTE_UNUSED;
234 /* This is the default expand_expr function. */
237 lhd_expand_expr (t, r, mm, em)
238 tree t ATTRIBUTE_UNUSED;
239 rtx r ATTRIBUTE_UNUSED;
240 enum machine_mode mm ATTRIBUTE_UNUSED;
241 int em ATTRIBUTE_UNUSED;
246 /* This is the default decl_printable_name function. */
249 lhd_decl_printable_name (decl, verbosity)
251 int verbosity ATTRIBUTE_UNUSED;
253 return IDENTIFIER_POINTER (DECL_NAME (decl));
256 /* lang_hooks.tree_inlining.walk_subtrees is called by walk_tree()
257 after handling common cases, but before walking code-specific
258 sub-trees. If this hook is overridden for a language, it should
259 handle language-specific tree codes, as well as language-specific
260 information associated to common tree codes. If a tree node is
261 completely handled within this function, it should set *SUBTREES to
262 0, so that generic handling isn't attempted. For language-specific
263 tree codes, generic handling would abort(), so make sure it is set
264 properly. Both SUBTREES and *SUBTREES is guaranteed to be nonzero
265 when the function is called. */
268 lhd_tree_inlining_walk_subtrees (tp,subtrees,func,data,htab)
269 tree *tp ATTRIBUTE_UNUSED;
270 int *subtrees ATTRIBUTE_UNUSED;
271 walk_tree_fn func ATTRIBUTE_UNUSED;
272 void *data ATTRIBUTE_UNUSED;
273 void *htab ATTRIBUTE_UNUSED;
278 /* lang_hooks.tree_inlining.cannot_inline_tree_fn is called to
279 determine whether there are language-specific reasons for not
280 inlining a given function. */
283 lhd_tree_inlining_cannot_inline_tree_fn (fnp)
286 if (flag_really_no_inline
287 && lookup_attribute ("always_inline", DECL_ATTRIBUTES (*fnp)) == NULL)
293 /* lang_hooks.tree_inlining.disregard_inline_limits is called to
294 determine whether a function should be considered for inlining even
295 if it would exceed inlining limits. */
298 lhd_tree_inlining_disregard_inline_limits (fn)
301 if (lookup_attribute ("always_inline", DECL_ATTRIBUTES (fn)) != NULL)
307 /* lang_hooks.tree_inlining.add_pending_fn_decls is called before
308 starting to inline a function, to push any language-specific
309 functions that should not be inlined into the current function,
310 into VAFNP. PFN is the top of varray, and should be returned if no
311 functions are pushed into VAFNP. The top of the varray should be
315 lhd_tree_inlining_add_pending_fn_decls (vafnp, pfn)
316 void *vafnp ATTRIBUTE_UNUSED;
322 /* lang_hooks.tree_inlining.tree_chain_matters_p indicates whether the
323 TREE_CHAIN of a language-specific tree node is relevant, i.e.,
324 whether it should be walked, copied and preserved across copies. */
327 lhd_tree_inlining_tree_chain_matters_p (t)
328 tree t ATTRIBUTE_UNUSED;
333 /* lang_hooks.tree_inlining.auto_var_in_fn_p is called to determine
334 whether VT is an automatic variable defined in function FT. */
337 lhd_tree_inlining_auto_var_in_fn_p (var, fn)
340 return (DECL_P (var) && DECL_CONTEXT (var) == fn
341 && (((TREE_CODE (var) == VAR_DECL || TREE_CODE (var) == PARM_DECL)
342 && ! TREE_STATIC (var))
343 || TREE_CODE (var) == LABEL_DECL
344 || TREE_CODE (var) == RESULT_DECL));
347 /* lang_hooks.tree_inlining.copy_res_decl_for_inlining should return a
348 declaration for the result RES of function FN to be inlined into
349 CALLER. NDP points to an integer that should be set in case a new
350 declaration wasn't created (presumably because RES was of aggregate
351 type, such that a TARGET_EXPR is used for the result). TEXPS is a
352 pointer to a varray with the stack of TARGET_EXPRs seen while
353 inlining functions into caller; the top of TEXPS is supposed to
357 lhd_tree_inlining_copy_res_decl_for_inlining (res, fn, caller,
358 dm, ndp, return_slot_addr)
359 tree res, fn, caller;
360 void *dm ATTRIBUTE_UNUSED;
361 int *ndp ATTRIBUTE_UNUSED;
362 tree return_slot_addr ATTRIBUTE_UNUSED;
364 if (return_slot_addr)
365 return build1 (INDIRECT_REF, TREE_TYPE (TREE_TYPE (return_slot_addr)),
368 return copy_decl_for_inlining (res, fn, caller);
371 /* lang_hooks.tree_inlining.anon_aggr_type_p determines whether T is a
372 type node representing an anonymous aggregate (union, struct, etc),
373 i.e., one whose members are in the same scope as the union itself. */
376 lhd_tree_inlining_anon_aggr_type_p (t)
377 tree t ATTRIBUTE_UNUSED;
382 /* lang_hooks.tree_inlining.start_inlining and end_inlining perform any
383 language-specific bookkeeping necessary for processing
384 FN. start_inlining returns nonzero if inlining should proceed, zero if
387 For instance, the C++ version keeps track of template instantiations to
388 avoid infinite recursion. */
391 lhd_tree_inlining_start_inlining (fn)
392 tree fn ATTRIBUTE_UNUSED;
398 lhd_tree_inlining_end_inlining (fn)
399 tree fn ATTRIBUTE_UNUSED;
403 /* lang_hooks.tree_inlining.convert_parm_for_inlining performs any
404 language-specific conversion before assigning VALUE to PARM. */
407 lhd_tree_inlining_convert_parm_for_inlining (parm, value, fndecl)
408 tree parm ATTRIBUTE_UNUSED;
410 tree fndecl ATTRIBUTE_UNUSED;
415 /* lang_hooks.tree_dump.dump_tree: Dump language-specific parts of tree
416 nodes. Returns nonzero if it does not want the usual dumping of the
420 lhd_tree_dump_dump_tree (di, t)
421 void *di ATTRIBUTE_UNUSED;
422 tree t ATTRIBUTE_UNUSED;
427 /* lang_hooks.tree_dump.type_qual: Determine type qualifiers in a
428 language-specific way. */
431 lhd_tree_dump_type_quals (t)
434 return TYPE_QUALS (t);
437 /* lang_hooks.expr_size: Determine the size of the value of an expression T
438 in a language-specific way. Returns a tree for the size in bytes. */
444 if (TREE_CODE_CLASS (TREE_CODE (exp)) == 'd'
445 && DECL_SIZE_UNIT (exp) != 0)
446 return DECL_SIZE_UNIT (exp);
448 return size_in_bytes (TREE_TYPE (exp));
451 /* lang_hooks.tree_size: Determine the size of a tree with code C,
452 which is a language-specific tree code in category 'x'. The
453 default expects never to be called. */
456 enum tree_code c ATTRIBUTE_UNUSED;
462 /* Return true if decl, which is a function decl, may be called by a
466 lhd_decl_ok_for_sibcall (decl)
467 tree decl ATTRIBUTE_UNUSED;
472 /* lang_hooks.decls.final_write_globals: perform final processing on
475 write_global_declarations ()
477 /* Really define vars that have had only a tentative definition.
478 Really output inline functions that must actually be callable
479 and have not been output so far. */
481 tree globals = (*lang_hooks.decls.getdecls) ();
482 int len = list_length (globals);
483 tree *vec = (tree *) xmalloc (sizeof (tree) * len);
487 /* Process the decls in reverse order--earliest first.
488 Put them into VEC from back to front, then take out from front. */
490 for (i = 0, decl = globals; i < len; i++, decl = TREE_CHAIN (decl))
491 vec[len - i - 1] = decl;
493 wrapup_global_declarations (vec, len);
495 check_global_declarations (vec, len);