1 /* Default language-specific hooks.
2 Copyright 2001, 2002, 2003 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"
28 #include "tree-inline.h"
30 #include "insn-config.h"
31 #include "integrate.h"
33 #include "langhooks.h"
34 #include "langhooks-def.h"
36 #include "diagnostic.h"
38 /* Do nothing; in many cases the default hook. */
45 /* Do nothing (tree). */
48 lhd_do_nothing_t (tree t ATTRIBUTE_UNUSED)
52 /* Do nothing (int). */
55 lhd_do_nothing_i (int i ATTRIBUTE_UNUSED)
59 /* Do nothing (int, int, int). Return NULL_TREE. */
62 lhd_do_nothing_iii_return_null_tree (int i ATTRIBUTE_UNUSED,
63 int j ATTRIBUTE_UNUSED,
64 int k ATTRIBUTE_UNUSED)
69 /* Do nothing (function). */
72 lhd_do_nothing_f (struct function *f ATTRIBUTE_UNUSED)
76 /* Do nothing (return the tree node passed). */
79 lhd_return_tree (tree t)
84 /* Do nothing (return NULL_TREE). */
87 lhd_return_null_tree (tree t ATTRIBUTE_UNUSED)
92 /* The default post options hook. */
95 lhd_post_options (const char **pfilename ATTRIBUTE_UNUSED)
100 /* Called from by print-tree.c. */
103 lhd_print_tree_nothing (FILE *file ATTRIBUTE_UNUSED,
104 tree node ATTRIBUTE_UNUSED,
105 int indent ATTRIBUTE_UNUSED)
109 /* Called from safe_from_p. */
112 lhd_safe_from_p (rtx x ATTRIBUTE_UNUSED, tree exp ATTRIBUTE_UNUSED)
117 /* Called from unsafe_for_reeval. */
120 lhd_unsafe_for_reeval (tree t ATTRIBUTE_UNUSED)
125 /* Called from staticp. */
128 lhd_staticp (tree exp ATTRIBUTE_UNUSED)
133 /* Called from check_global_declarations. */
136 lhd_warn_unused_global_decl (tree decl)
138 /* This is what used to exist in check_global_declarations. Probably
139 not many of these actually apply to non-C languages. */
141 if (TREE_CODE (decl) == FUNCTION_DECL && DECL_INLINE (decl))
143 if (TREE_CODE (decl) == VAR_DECL && TREE_READONLY (decl))
145 if (DECL_IN_SYSTEM_HEADER (decl))
151 /* Number for making the label on the next
152 static variable internal to a function. */
154 static GTY(()) int var_labelno;
156 /* Set the DECL_ASSEMBLER_NAME for DECL. */
158 lhd_set_decl_assembler_name (tree decl)
160 /* The language-independent code should never use the
161 DECL_ASSEMBLER_NAME for lots of DECLs. Only FUNCTION_DECLs and
162 VAR_DECLs for variables with static storage duration need a real
163 DECL_ASSEMBLER_NAME. */
164 if (TREE_CODE (decl) == FUNCTION_DECL
165 || (TREE_CODE (decl) == VAR_DECL
166 && (TREE_STATIC (decl)
167 || DECL_EXTERNAL (decl)
168 || TREE_PUBLIC (decl))))
170 /* By default, assume the name to use in assembly code is the
171 same as that used in the source language. (That's correct
172 for C, and GCC used to set DECL_ASSEMBLER_NAME to the same
173 value as DECL_NAME in build_decl, so this choice provides
174 backwards compatibility with existing front-ends.
176 Can't use just the variable's own name for a variable whose
177 scope is less than the whole compilation. Concatenate a
178 distinguishing number. */
179 if (!TREE_PUBLIC (decl) && DECL_CONTEXT (decl))
181 const char *name = IDENTIFIER_POINTER (DECL_NAME (decl));
184 ASM_FORMAT_PRIVATE_NAME (label, name, var_labelno);
186 SET_DECL_ASSEMBLER_NAME (decl, get_identifier (label));
189 SET_DECL_ASSEMBLER_NAME (decl, DECL_NAME (decl));
192 /* Nobody should ever be asking for the DECL_ASSEMBLER_NAME of
193 these DECLs -- unless they're in language-dependent code, in
194 which case set_decl_assembler_name hook should handle things. */
198 /* By default we always allow bit-field based optimizations. */
200 lhd_can_use_bit_fields_p (void)
205 /* Provide a default routine to clear the binding stack. This is used
206 by languages that don't need to do anything special. */
208 lhd_clear_binding_stack (void)
210 while (! (*lang_hooks.decls.global_bindings_p) ())
214 /* Type promotion for variable arguments. */
216 lhd_type_promotes_to (tree type ATTRIBUTE_UNUSED)
221 /* Registration of machine- or os-specific builtin types. */
223 lhd_register_builtin_type (tree type ATTRIBUTE_UNUSED,
224 const char* name ATTRIBUTE_UNUSED)
228 /* Invalid use of an incomplete type. */
230 lhd_incomplete_type_error (tree value ATTRIBUTE_UNUSED, tree type)
232 if (TREE_CODE (type) == ERROR_MARK)
238 /* Provide a default routine for alias sets that always returns -1. This
239 is used by languages that don't need to do anything special. */
242 lhd_get_alias_set (tree t ATTRIBUTE_UNUSED)
247 /* Provide a hook routine for alias sets that always returns 0. This is
248 used by languages that haven't deal with alias sets yet. */
251 hook_get_alias_set_0 (tree t ATTRIBUTE_UNUSED)
256 /* This is the default expand_expr function. */
259 lhd_expand_expr (tree t ATTRIBUTE_UNUSED, rtx r ATTRIBUTE_UNUSED,
260 enum machine_mode mm ATTRIBUTE_UNUSED,
261 int em ATTRIBUTE_UNUSED)
266 /* This is the default decl_printable_name function. */
269 lhd_decl_printable_name (tree decl, int verbosity ATTRIBUTE_UNUSED)
271 return IDENTIFIER_POINTER (DECL_NAME (decl));
274 /* lang_hooks.tree_inlining.walk_subtrees is called by walk_tree()
275 after handling common cases, but before walking code-specific
276 sub-trees. If this hook is overridden for a language, it should
277 handle language-specific tree codes, as well as language-specific
278 information associated to common tree codes. If a tree node is
279 completely handled within this function, it should set *SUBTREES to
280 0, so that generic handling isn't attempted. For language-specific
281 tree codes, generic handling would abort(), so make sure it is set
282 properly. Both SUBTREES and *SUBTREES is guaranteed to be nonzero
283 when the function is called. */
286 lhd_tree_inlining_walk_subtrees (tree *tp ATTRIBUTE_UNUSED,
287 int *subtrees ATTRIBUTE_UNUSED,
288 walk_tree_fn func ATTRIBUTE_UNUSED,
289 void *data ATTRIBUTE_UNUSED,
290 void *htab ATTRIBUTE_UNUSED)
295 /* lang_hooks.tree_inlining.cannot_inline_tree_fn is called to
296 determine whether there are language-specific reasons for not
297 inlining a given function. */
300 lhd_tree_inlining_cannot_inline_tree_fn (tree *fnp)
302 if (flag_really_no_inline
303 && lookup_attribute ("always_inline", DECL_ATTRIBUTES (*fnp)) == NULL)
309 /* lang_hooks.tree_inlining.disregard_inline_limits is called to
310 determine whether a function should be considered for inlining even
311 if it would exceed inlining limits. */
314 lhd_tree_inlining_disregard_inline_limits (tree fn)
316 if (lookup_attribute ("always_inline", DECL_ATTRIBUTES (fn)) != NULL)
322 /* lang_hooks.tree_inlining.add_pending_fn_decls is called before
323 starting to inline a function, to push any language-specific
324 functions that should not be inlined into the current function,
325 into VAFNP. PFN is the top of varray, and should be returned if no
326 functions are pushed into VAFNP. The top of the varray should be
330 lhd_tree_inlining_add_pending_fn_decls (void *vafnp ATTRIBUTE_UNUSED, tree pfn)
335 /* lang_hooks.tree_inlining.tree_chain_matters_p indicates whether the
336 TREE_CHAIN of a language-specific tree node is relevant, i.e.,
337 whether it should be walked, copied and preserved across copies. */
340 lhd_tree_inlining_tree_chain_matters_p (tree t ATTRIBUTE_UNUSED)
345 /* lang_hooks.tree_inlining.auto_var_in_fn_p is called to determine
346 whether VT is an automatic variable defined in function FT. */
349 lhd_tree_inlining_auto_var_in_fn_p (tree var, tree fn)
351 return (DECL_P (var) && DECL_CONTEXT (var) == fn
352 && (((TREE_CODE (var) == VAR_DECL || TREE_CODE (var) == PARM_DECL)
353 && ! TREE_STATIC (var))
354 || TREE_CODE (var) == LABEL_DECL
355 || TREE_CODE (var) == RESULT_DECL));
358 /* lang_hooks.tree_inlining.copy_res_decl_for_inlining should return a
359 declaration for the result RES of function FN to be inlined into
360 CALLER. NDP points to an integer that should be set in case a new
361 declaration wasn't created (presumably because RES was of aggregate
362 type, such that a TARGET_EXPR is used for the result). TEXPS is a
363 pointer to a varray with the stack of TARGET_EXPRs seen while
364 inlining functions into caller; the top of TEXPS is supposed to
368 lhd_tree_inlining_copy_res_decl_for_inlining (tree res, tree fn, tree caller,
369 void *dm ATTRIBUTE_UNUSED,
370 int *ndp ATTRIBUTE_UNUSED,
371 tree return_slot_addr ATTRIBUTE_UNUSED)
373 if (return_slot_addr)
374 return build1 (INDIRECT_REF, TREE_TYPE (TREE_TYPE (return_slot_addr)),
377 return copy_decl_for_inlining (res, fn, caller);
380 /* lang_hooks.tree_inlining.anon_aggr_type_p determines whether T is a
381 type node representing an anonymous aggregate (union, struct, etc),
382 i.e., one whose members are in the same scope as the union itself. */
385 lhd_tree_inlining_anon_aggr_type_p (tree t ATTRIBUTE_UNUSED)
390 /* lang_hooks.tree_inlining.start_inlining and end_inlining perform any
391 language-specific bookkeeping necessary for processing
392 FN. start_inlining returns nonzero if inlining should proceed, zero if
395 For instance, the C++ version keeps track of template instantiations to
396 avoid infinite recursion. */
399 lhd_tree_inlining_start_inlining (tree fn ATTRIBUTE_UNUSED)
405 lhd_tree_inlining_end_inlining (tree fn ATTRIBUTE_UNUSED)
409 /* lang_hooks.tree_inlining.convert_parm_for_inlining performs any
410 language-specific conversion before assigning VALUE to PARM. */
413 lhd_tree_inlining_convert_parm_for_inlining (tree parm ATTRIBUTE_UNUSED,
415 tree fndecl ATTRIBUTE_UNUSED)
420 /* lang_hooks.tree_dump.dump_tree: Dump language-specific parts of tree
421 nodes. Returns nonzero if it does not want the usual dumping of the
425 lhd_tree_dump_dump_tree (void *di ATTRIBUTE_UNUSED, tree t ATTRIBUTE_UNUSED)
430 /* lang_hooks.tree_dump.type_qual: Determine type qualifiers in a
431 language-specific way. */
434 lhd_tree_dump_type_quals (tree t)
436 return TYPE_QUALS (t);
439 /* lang_hooks.expr_size: Determine the size of the value of an expression T
440 in a language-specific way. Returns a tree for the size in bytes. */
443 lhd_expr_size (tree exp)
445 if (TREE_CODE_CLASS (TREE_CODE (exp)) == 'd'
446 && DECL_SIZE_UNIT (exp) != 0)
447 return DECL_SIZE_UNIT (exp);
449 return size_in_bytes (TREE_TYPE (exp));
451 /* lang_hooks.decl_uninit: Find out if a variable is uninitialized based
455 lhd_decl_uninit (tree t ATTRIBUTE_UNUSED)
460 /* lang_hooks.tree_size: Determine the size of a tree with code C,
461 which is a language-specific tree code in category 'x'. The
462 default expects never to be called. */
464 lhd_tree_size (enum tree_code c ATTRIBUTE_UNUSED)
470 /* Return true if decl, which is a function decl, may be called by a
474 lhd_decl_ok_for_sibcall (tree decl ATTRIBUTE_UNUSED)
479 /* lang_hooks.decls.final_write_globals: perform final processing on
482 write_global_declarations (void)
484 /* Really define vars that have had only a tentative definition.
485 Really output inline functions that must actually be callable
486 and have not been output so far. */
488 tree globals = (*lang_hooks.decls.getdecls) ();
489 int len = list_length (globals);
490 tree *vec = xmalloc (sizeof (tree) * len);
494 /* Process the decls in reverse order--earliest first.
495 Put them into VEC from back to front, then take out from front. */
497 for (i = 0, decl = globals; i < len; i++, decl = TREE_CHAIN (decl))
498 vec[len - i - 1] = decl;
500 wrapup_global_declarations (vec, len);
502 check_global_declarations (vec, len);
508 /* Called to perform language-specific initialization of CTX. */
510 lhd_initialize_diagnostics (struct diagnostic_context *ctx ATTRIBUTE_UNUSED)
514 /* The default function to print out name of current function that caused
517 lhd_print_error_function (diagnostic_context *context, const char *file)
519 if (diagnostic_last_function_changed (context))
521 const char *old_prefix = context->printer->prefix;
522 char *new_prefix = file ? file_name_as_prefix (file) : NULL;
524 pp_set_prefix (context->printer, new_prefix);
526 if (current_function_decl == NULL)
527 pp_printf (context->printer, "At top level:");
530 if (TREE_CODE (TREE_TYPE (current_function_decl)) == METHOD_TYPE)
532 (context->printer, "In member function `%s':",
533 (*lang_hooks.decl_printable_name) (current_function_decl, 2));
536 (context->printer, "In function `%s':",
537 (*lang_hooks.decl_printable_name) (current_function_decl, 2));
539 pp_newline (context->printer);
541 diagnostic_set_last_function (context);
542 pp_flush (context->printer);
543 context->printer->prefix = old_prefix;
544 free ((char*) new_prefix);
549 lhd_callgraph_analyze_expr (tree *tp ATTRIBUTE_UNUSED,
550 int *walk_subtrees ATTRIBUTE_UNUSED,
551 tree decl ATTRIBUTE_UNUSED)
556 #include "gt-langhooks.h"