1 /* toplev.h - Various declarations for functions found in toplev.c
2 Copyright (C) 1998, 1999, 2000, 2001, 2003, 2004, 2005, 2006, 2007,
4 Free Software Foundation, Inc.
6 This file is part of GCC.
8 GCC is free software; you can redistribute it and/or modify it under
9 the terms of the GNU General Public License as published by the Free
10 Software Foundation; either version 3, or (at your option) any later
13 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
14 WARRANTY; without even the implied warranty of MERCHANTABILITY or
15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
18 You should have received a copy of the GNU General Public License
19 along with GCC; see the file COPYING3. If not see
20 <http://www.gnu.org/licenses/>. */
27 /* If non-NULL, return one past-the-end of the matching SUBPART of
29 #define skip_leading_substring(whole, part) \
30 (strncmp (whole, part, strlen (part)) ? NULL : whole + strlen (part))
32 /* Decoded options, and number of such options. */
33 extern struct cl_decoded_option *save_decoded_options;
34 extern unsigned int save_decoded_options_count;
36 extern int toplev_main (int, char **);
37 extern void strip_off_ending (char *, int);
38 extern void rest_of_decl_compilation (tree, int, int);
39 extern void rest_of_type_compilation (tree, int);
40 extern void tree_rest_of_compilation (tree);
41 extern void init_optimization_passes (void);
42 extern void finish_optimization_passes (void);
43 extern bool enable_rtl_dump_file (void);
45 /* In except.c. Initialize exception handling. This is used by the Ada
46 and LTO front ends to initialize EH "on demand". See lto-streamer-in.c
47 and ada/gcc-interface/misc.c. */
48 extern void init_eh (void);
50 extern void announce_function (tree);
52 extern void warn_deprecated_use (tree, tree);
53 extern bool parse_optimize_options (tree, bool);
56 extern void output_quoted_string (FILE *, const char *);
59 extern void wrapup_global_declaration_1 (tree);
60 extern bool wrapup_global_declaration_2 (tree);
61 extern bool wrapup_global_declarations (tree *, int);
62 extern void check_global_declaration_1 (tree);
63 extern void check_global_declarations (tree *, int);
64 extern void emit_debug_global_declarations (tree *, int);
65 extern void write_global_declarations (void);
67 extern void dump_memory_report (bool);
69 extern void target_reinit (void);
71 /* A unique local time stamp, might be zero if none is available. */
72 extern unsigned local_tick;
74 /* Top-level source file. */
75 extern const char *main_input_filename;
77 extern const char *dump_base_name;
78 extern const char *dump_dir_name;
79 extern const char *aux_base_name;
80 extern const char *aux_info_file_name;
81 extern const char *profile_data_prefix;
82 extern const char *asm_file_name;
83 extern bool exit_after_options;
85 /* True if the user has tagged the function with the 'section'
88 extern bool user_defined_section_attribute;
91 extern int flag_rerun_cse_after_global_opts;
93 /* Things to do with target switches. */
94 extern void print_version (FILE *, const char *);
95 extern void * default_get_pch_validity (size_t *);
96 extern const char * default_pch_valid_p (const void *, size_t);
98 /* The hashtable, so that the C front ends can pass it to cpplib. */
99 extern struct ht *ident_hash;
101 /* Handle -d switch. */
102 extern void decode_d_option (const char *);
104 /* Return true iff flags are set as if -ffast-math. */
105 extern bool fast_math_flags_set_p (void);
106 extern bool fast_math_flags_struct_set_p (struct cl_optimization *);
108 /* Inline versions of the above for speed. */
109 #if GCC_VERSION < 3004
111 extern int clz_hwi (unsigned HOST_WIDE_INT x);
112 extern int ctz_hwi (unsigned HOST_WIDE_INT x);
113 extern int ffs_hwi (unsigned HOST_WIDE_INT x);
115 /* Return log2, or -1 if not exact. */
116 extern int exact_log2 (unsigned HOST_WIDE_INT);
118 /* Return floor of log2, with -1 for zero. */
119 extern int floor_log2 (unsigned HOST_WIDE_INT);
121 #else /* GCC_VERSION >= 3004 */
123 /* For convenience, define 0 -> word_size. */
125 clz_hwi (unsigned HOST_WIDE_INT x)
128 return HOST_BITS_PER_WIDE_INT;
129 # if HOST_BITS_PER_WIDE_INT == HOST_BITS_PER_LONG
130 return __builtin_clzl (x);
131 # elif HOST_BITS_PER_WIDE_INT == HOST_BITS_PER_LONGLONG
132 return __builtin_clzll (x);
134 return __builtin_clz (x);
139 ctz_hwi (unsigned HOST_WIDE_INT x)
142 return HOST_BITS_PER_WIDE_INT;
143 # if HOST_BITS_PER_WIDE_INT == HOST_BITS_PER_LONG
144 return __builtin_ctzl (x);
145 # elif HOST_BITS_PER_WIDE_INT == HOST_BITS_PER_LONGLONG
146 return __builtin_ctzll (x);
148 return __builtin_ctz (x);
153 ffs_hwi (unsigned HOST_WIDE_INT x)
155 # if HOST_BITS_PER_WIDE_INT == HOST_BITS_PER_LONG
156 return __builtin_ffsl (x);
157 # elif HOST_BITS_PER_WIDE_INT == HOST_BITS_PER_LONGLONG
158 return __builtin_ffsll (x);
160 return __builtin_ffs (x);
165 floor_log2 (unsigned HOST_WIDE_INT x)
167 return HOST_BITS_PER_WIDE_INT - 1 - clz_hwi (x);
171 exact_log2 (unsigned HOST_WIDE_INT x)
173 return x == (x & -x) && x ? ctz_hwi (x) : -1;
176 #endif /* GCC_VERSION >= 3004 */
178 /* Functions used to get and set GCC's notion of in what directory
179 compilation was started. */
181 extern const char *get_src_pwd (void);
182 extern bool set_src_pwd (const char *);
184 /* Functions used to manipulate the random seed. */
186 extern const char *get_random_seed (bool);
187 extern const char *set_random_seed (const char *);
189 #endif /* ! GCC_TOPLEV_H */