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comparison gcc/c-objc-common.c @ 0:a06113de4d67

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author kent <kent@cr.ie.u-ryukyu.ac.jp>
date Fri, 17 Jul 2009 14:47:48 +0900
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children 77e2b8dfacca
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-1:000000000000 0:a06113de4d67
1 /* Some code common to C and ObjC front ends.
2 Copyright (C) 2001, 2002, 2003, 2004, 2005, 2007 Free Software Foundation, Inc.
3
4 This file is part of GCC.
5
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 3, or (at your option) any later
9 version.
10
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
14 for more details.
15
16 You should have received a copy of the GNU General Public License
17 along with GCC; see the file COPYING3. If not see
18 <http://www.gnu.org/licenses/>. */
19
20 #include "config.h"
21 #include "system.h"
22 #include "coretypes.h"
23 #include "tm.h"
24 #include "tree.h"
25 #include "rtl.h"
26 #include "insn-config.h"
27 #include "integrate.h"
28 #include "c-tree.h"
29 #include "c-pretty-print.h"
30 #include "function.h"
31 #include "flags.h"
32 #include "toplev.h"
33 #include "diagnostic.h"
34 #include "tree-inline.h"
35 #include "varray.h"
36 #include "ggc.h"
37 #include "langhooks.h"
38 #include "tree-mudflap.h"
39 #include "target.h"
40 #include "c-objc-common.h"
41
42 static bool c_tree_printer (pretty_printer *, text_info *, const char *,
43 int, bool, bool, bool);
44
45 bool
46 c_missing_noreturn_ok_p (tree decl)
47 {
48 /* A missing noreturn is not ok for freestanding implementations and
49 ok for the `main' function in hosted implementations. */
50 return flag_hosted && MAIN_NAME_P (DECL_ASSEMBLER_NAME (decl));
51 }
52
53 /* Called from check_global_declarations. */
54
55 bool
56 c_warn_unused_global_decl (const_tree decl)
57 {
58 if (TREE_CODE (decl) == FUNCTION_DECL && DECL_DECLARED_INLINE_P (decl))
59 return false;
60 if (DECL_IN_SYSTEM_HEADER (decl))
61 return false;
62
63 return true;
64 }
65
66 /* Initialization common to C and Objective-C front ends. */
67 bool
68 c_objc_common_init (void)
69 {
70 c_init_decl_processing ();
71
72 if (c_common_init () == false)
73 return false;
74
75 /* These were not defined in the Objective-C front end, but I'm
76 putting them here anyway. The diagnostic format decoder might
77 want an enhanced ObjC implementation. */
78 diagnostic_format_decoder (global_dc) = &c_tree_printer;
79
80 return true;
81 }
82
83 /* Called during diagnostic message formatting process to print a
84 source-level entity onto BUFFER. The meaning of the format specifiers
85 is as follows:
86 %D: a general decl,
87 %E: an identifier or expression,
88 %F: a function declaration,
89 %T: a type.
90
91 These format specifiers form a subset of the format specifiers set used
92 by the C++ front-end.
93 Please notice when called, the `%' part was already skipped by the
94 diagnostic machinery. */
95 static bool
96 c_tree_printer (pretty_printer *pp, text_info *text, const char *spec,
97 int precision, bool wide, bool set_locus, bool hash)
98 {
99 tree t = va_arg (*text->args_ptr, tree);
100 tree name;
101 const char *n = "({anonymous})";
102 c_pretty_printer *cpp = (c_pretty_printer *) pp;
103 pp->padding = pp_none;
104
105 if (precision != 0 || wide || hash)
106 return false;
107
108 if (set_locus && text->locus)
109 *text->locus = DECL_SOURCE_LOCATION (t);
110
111 switch (*spec)
112 {
113 case 'D':
114 if (DECL_DEBUG_EXPR_IS_FROM (t) && DECL_DEBUG_EXPR (t))
115 {
116 t = DECL_DEBUG_EXPR (t);
117 if (!DECL_P (t))
118 {
119 pp_c_expression (cpp, t);
120 return true;
121 }
122 }
123 /* FALLTHRU */
124
125 case 'F':
126 if (DECL_NAME (t))
127 n = lang_hooks.decl_printable_name (t, 2);
128 break;
129
130 case 'T':
131 gcc_assert (TYPE_P (t));
132 name = TYPE_NAME (t);
133
134 if (name && TREE_CODE (name) == TYPE_DECL)
135 {
136 if (DECL_NAME (name))
137 pp_string (cpp, lang_hooks.decl_printable_name (name, 2));
138 else
139 pp_type_id (cpp, t);
140 return true;
141 }
142 else
143 {
144 pp_type_id (cpp, t);
145 return true;
146 }
147 break;
148
149 case 'E':
150 if (TREE_CODE (t) == IDENTIFIER_NODE)
151 n = IDENTIFIER_POINTER (t);
152 else
153 {
154 pp_expression (cpp, t);
155 return true;
156 }
157 break;
158
159 default:
160 return false;
161 }
162
163 pp_string (cpp, n);
164 return true;
165 }
166
167 /* In C and ObjC, all decls have "C" linkage. */
168 bool
169 has_c_linkage (const_tree decl ATTRIBUTE_UNUSED)
170 {
171 return true;
172 }
173
174 void
175 c_initialize_diagnostics (diagnostic_context *context)
176 {
177 pretty_printer *base = context->printer;
178 c_pretty_printer *pp = XNEW (c_pretty_printer);
179 memcpy (pp_base (pp), base, sizeof (pretty_printer));
180 pp_c_pretty_printer_init (pp);
181 context->printer = (pretty_printer *) pp;
182
183 /* It is safe to free this object because it was previously XNEW()'d. */
184 XDELETE (base);
185 }
186
187 int
188 c_types_compatible_p (tree x, tree y)
189 {
190 return comptypes (TYPE_MAIN_VARIANT (x), TYPE_MAIN_VARIANT (y));
191 }
192
193 /* Determine if the type is a vla type for the backend. */
194
195 bool
196 c_vla_unspec_p (tree x, tree fn ATTRIBUTE_UNUSED)
197 {
198 return c_vla_type_p (x);
199 }