1 /* Some code common to C and ObjC front ends.
2 Copyright (C) 2001, 2002, 2003, 2004 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"
30 #include "c-pretty-print.h"
34 #include "diagnostic.h"
35 #include "tree-inline.h"
38 #include "langhooks.h"
39 #include "tree-mudflap.h"
42 static bool c_tree_printer (pretty_printer *, text_info *);
45 c_missing_noreturn_ok_p (tree decl)
47 /* A missing noreturn is not ok for freestanding implementations and
48 ok for the `main' function in hosted implementations. */
49 return flag_hosted && MAIN_NAME_P (DECL_ASSEMBLER_NAME (decl));
52 /* We want to inline `extern inline' functions even if this would
53 violate inlining limits. Some glibc and linux constructs depend on
54 such functions always being inlined when optimizing. */
57 c_disregard_inline_limits (tree fn)
59 if (lookup_attribute ("always_inline", DECL_ATTRIBUTES (fn)) != NULL)
62 return (!flag_really_no_inline && DECL_DECLARED_INLINE_P (fn)
63 && DECL_EXTERNAL (fn));
67 c_cannot_inline_tree_fn (tree *fnp)
71 bool do_warning = (warn_inline
73 && DECL_DECLARED_INLINE_P (fn)
74 && !DECL_IN_SYSTEM_HEADER (fn));
76 if (flag_really_no_inline
77 && lookup_attribute ("always_inline", DECL_ATTRIBUTES (fn)) == NULL)
80 warning ("%Jfunction '%F' can never be inlined because it "
81 "is suppressed using -fno-inline", fn, fn);
85 /* Don't auto-inline anything that might not be bound within
86 this unit of translation. */
87 if (!DECL_DECLARED_INLINE_P (fn) && !targetm.binds_local_p (fn))
90 warning ("%Jfunction '%F' can never be inlined because it might not "
91 "be bound within this unit of translation", fn, fn);
95 if (! function_attribute_inlinable_p (fn))
98 warning ("%Jfunction '%F' can never be inlined because it uses "
99 "attributes conflicting with inlining", fn, fn);
103 /* If a function has pending sizes, we must not defer its
104 compilation, and we can't inline it as a tree. */
105 if (fn == current_function_decl)
107 t = get_pending_sizes ();
108 put_pending_sizes (t);
113 warning ("%Jfunction '%F' can never be inlined because it has "
114 "pending sizes", fn, fn);
119 if (! DECL_FILE_SCOPE_P (fn))
121 /* If a nested function has pending sizes, we may have already
123 if (DECL_LANG_SPECIFIC (fn)->pending_sizes)
126 warning ("%Jnested function '%F' can never be inlined because it "
127 "has possibly saved pending sizes", fn, fn);
135 DECL_UNINLINABLE (fn) = 1;
139 /* Called from check_global_declarations. */
142 c_warn_unused_global_decl (tree decl)
144 if (TREE_CODE (decl) == FUNCTION_DECL && DECL_DECLARED_INLINE_P (decl))
146 if (DECL_IN_SYSTEM_HEADER (decl))
152 /* Initialization common to C and Objective-C front ends. */
154 c_objc_common_init (void)
156 static const enum tree_code stmt_codes[] = {
160 INIT_STATEMENT_CODES (stmt_codes);
162 c_init_decl_processing ();
164 if (c_common_init () == false)
167 /* These were not defined in the Objective-C front end, but I'm
168 putting them here anyway. The diagnostic format decoder might
169 want an enhanced ObjC implementation. */
170 diagnostic_format_decoder (global_dc) = &c_tree_printer;
172 /* If still unspecified, make it match -std=c99
173 (allowing for -pedantic-errors). */
174 if (mesg_implicit_function_declaration < 0)
177 mesg_implicit_function_declaration = flag_pedantic_errors ? 2 : 1;
179 mesg_implicit_function_declaration = 0;
185 /* Called during diagnostic message formatting process to print a
186 source-level entity onto BUFFER. The meaning of the format specifiers
190 %F: a function declaration,
193 These format specifiers form a subset of the format specifiers set used
194 by the C++ front-end.
195 Please notice when called, the `%' part was already skipped by the
196 diagnostic machinery. */
198 c_tree_printer (pretty_printer *pp, text_info *text)
200 tree t = va_arg (*text->args_ptr, tree);
202 const char *n = "({anonymous})";
203 c_pretty_printer *cpp = (c_pretty_printer *) pp;
204 pp->padding = pp_none;
206 switch (*text->format_spec)
211 n = lang_hooks.decl_printable_name (t, 2);
216 name = TYPE_NAME (t);
219 if (name && TREE_CODE (name) == TYPE_DECL)
221 if (DECL_NAME (name))
222 pp_string (cpp, lang_hooks.decl_printable_name (name, 2));
235 if (TREE_CODE (t) == IDENTIFIER_NODE)
236 n = IDENTIFIER_POINTER (t);
250 c_objc_common_truthvalue_conversion (tree expr)
253 switch (TREE_CODE (TREE_TYPE (expr)))
256 expr = default_conversion (expr);
257 if (TREE_CODE (TREE_TYPE (expr)) != ARRAY_TYPE)
260 error ("used array that cannot be converted to pointer where scalar is required");
261 return error_mark_node;
264 error ("used struct type value where scalar is required");
265 return error_mark_node;
268 error ("used union type value where scalar is required");
269 return error_mark_node;
274 return c_common_truthvalue_conversion (expr);
277 /* In C and ObjC, all decls have "C" linkage. */
279 has_c_linkage (tree decl ATTRIBUTE_UNUSED)
285 c_initialize_diagnostics (diagnostic_context *context)
287 pretty_printer *base = context->printer;
288 c_pretty_printer *pp = xmalloc (sizeof (c_pretty_printer));
289 memcpy (pp_base (pp), base, sizeof (pretty_printer));
290 pp_c_pretty_printer_init (pp);
291 context->printer = (pretty_printer *) pp;
293 /* It is safe to free this object because it was previously malloc()'d. */