1 /* Some code common to C and ObjC front ends.
2 Copyright (C) 2001, 2002, 2003 Free Software Foundation, Inc.
4 This file is part of GCC.
6 GCC is free software; you can redistribute it and/or modify it under
7 the terms of the GNU General Public License as published by the Free
8 Software Foundation; either version 2, or (at your option) any later
11 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
12 WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
16 You should have received a copy of the GNU General Public License
17 along with GCC; see the file COPYING. If not, write to the Free
18 Software Foundation, 59 Temple Place - Suite 330, Boston, MA
23 #include "coretypes.h"
27 #include "insn-config.h"
28 #include "integrate.h"
34 #include "diagnostic.h"
35 #include "tree-inline.h"
38 #include "langhooks.h"
42 static bool c_tree_printer (pretty_printer *, text_info *);
43 static tree start_cdtor (int);
44 static void finish_cdtor (tree);
47 c_missing_noreturn_ok_p (tree decl)
49 /* A missing noreturn is not ok for freestanding implementations and
50 ok for the `main' function in hosted implementations. */
51 return flag_hosted && MAIN_NAME_P (DECL_ASSEMBLER_NAME (decl));
54 /* We want to inline `extern inline' functions even if this would
55 violate inlining limits. Some glibc and linux constructs depend on
56 such functions always being inlined when optimizing. */
59 c_disregard_inline_limits (tree fn)
61 if (lookup_attribute ("always_inline", DECL_ATTRIBUTES (fn)) != NULL)
64 return DECL_DECLARED_INLINE_P (fn) && DECL_EXTERNAL (fn);
68 c_cannot_inline_tree_fn (tree *fnp)
72 bool do_warning = (warn_inline
74 && DECL_DECLARED_INLINE_P (fn)
75 && !DECL_IN_SYSTEM_HEADER (fn));
77 if (flag_really_no_inline
78 && lookup_attribute ("always_inline", DECL_ATTRIBUTES (fn)) == NULL)
81 warning ("%Jfunction '%F' can never be inlined because it "
82 "is supressed using -fno-inline", fn, fn);
86 /* Don't auto-inline anything that might not be bound within
87 this unit of translation. */
88 if (!DECL_DECLARED_INLINE_P (fn) && !(*targetm.binds_local_p) (fn))
91 warning ("%Jfunction '%F' can never be inlined because it might not "
92 "be bound within this unit of translation", fn, fn);
96 if (! function_attribute_inlinable_p (fn))
99 warning ("%Jfunction '%F' can never be inlined because it uses "
100 "attributes conflicting with inlining", fn, fn);
104 /* If a function has pending sizes, we must not defer its
105 compilation, and we can't inline it as a tree. */
106 if (fn == current_function_decl)
108 t = get_pending_sizes ();
109 put_pending_sizes (t);
114 warning ("%Jfunction '%F' can never be inlined because it has "
115 "pending sizes", fn, fn);
120 if (! DECL_FILE_SCOPE_P (fn))
122 /* If a nested function has pending sizes, we may have already
124 if (DECL_LANG_SPECIFIC (fn)->pending_sizes)
127 warning ("%Jnested function '%F' can never be inlined because it "
128 "has possibly saved pending sizes", fn, fn);
136 DECL_UNINLINABLE (fn) = 1;
140 /* Called from check_global_declarations. */
143 c_warn_unused_global_decl (tree decl)
145 if (TREE_CODE (decl) == FUNCTION_DECL && DECL_DECLARED_INLINE_P (decl))
147 if (DECL_IN_SYSTEM_HEADER (decl))
153 /* Initialization common to C and Objective-C front ends. */
155 c_objc_common_init (void)
157 static const enum tree_code stmt_codes[] = {
161 INIT_STATEMENT_CODES (stmt_codes);
163 c_init_decl_processing ();
165 if (c_common_init () == false)
168 lang_expand_decl_stmt = c_expand_decl_stmt;
170 /* These were not defined in the Objective-C front end, but I'm
171 putting them here anyway. The diagnostic format decoder might
172 want an enhanced ObjC implementation. */
173 diagnostic_format_decoder (global_dc) = &c_tree_printer;
174 lang_missing_noreturn_ok_p = &c_missing_noreturn_ok_p;
176 /* If still unspecified, make it match -std=c99
177 (allowing for -pedantic-errors). */
178 if (mesg_implicit_function_declaration < 0)
181 mesg_implicit_function_declaration = flag_pedantic_errors ? 2 : 1;
183 mesg_implicit_function_declaration = 0;
190 start_cdtor (int method_type)
192 tree fnname = get_file_function_name (method_type);
193 tree void_list_node_1 = build_tree_list (NULL_TREE, void_type_node);
196 start_function (void_list_node_1,
197 build_nt (CALL_EXPR, fnname,
198 tree_cons (NULL_TREE, NULL_TREE, void_list_node_1),
203 current_function_cannot_inline
204 = "static constructors and destructors cannot be inlined";
206 body = c_begin_compound_stmt ();
210 add_scope_stmt (/*begin_p=*/1, /*partial_p=*/0);
216 finish_cdtor (tree body)
221 scope = add_scope_stmt (/*begin_p=*/0, /*partial_p=*/0);
222 block = poplevel (0, 0, 0);
223 SCOPE_STMT_BLOCK (TREE_PURPOSE (scope)) = block;
224 SCOPE_STMT_BLOCK (TREE_VALUE (scope)) = block;
226 RECHAIN_STMTS (body, COMPOUND_BODY (body));
231 /* Called at end of parsing, but before end-of-file processing. */
234 c_objc_common_finish_file (void)
237 c_common_write_pch ();
239 /* If multiple translation units were built, copy information between
240 them based on linkage rules. */
241 merge_translation_unit_decls ();
243 cgraph_finalize_compilation_unit ();
248 tree body = start_cdtor ('I');
250 for (; static_ctors; static_ctors = TREE_CHAIN (static_ctors))
251 c_expand_expr_stmt (build_function_call (TREE_VALUE (static_ctors),
259 tree body = start_cdtor ('D');
261 for (; static_dtors; static_dtors = TREE_CHAIN (static_dtors))
262 c_expand_expr_stmt (build_function_call (TREE_VALUE (static_dtors),
270 FILE *stream = dump_begin (TDI_all, &flags);
274 dump_node (getdecls (), flags & ~TDF_SLIM, stream);
275 dump_end (TDI_all, stream);
280 /* Called during diagnostic message formatting process to print a
281 source-level entity onto BUFFER. The meaning of the format specifiers
285 %F: a function declaration,
288 These format specifiers form a subset of the format specifiers set used
289 by the C++ front-end.
290 Please notice when called, the `%' part was already skipped by the
291 diagnostic machinery. */
293 c_tree_printer (pretty_printer *pp, text_info *text)
295 tree t = va_arg (*text->args_ptr, tree);
297 switch (*text->format_spec)
303 const char *n = DECL_NAME (t)
304 ? (*lang_hooks.decl_printable_name) (t, 2)
311 if (TREE_CODE (t) == IDENTIFIER_NODE)
313 pp_string (pp, IDENTIFIER_POINTER (t));