gcc/toplev.h

   1 /* toplev.h - Various declarations for functions found in toplev.c
   2    Copyright (C) 1998, 1999, 2000, 2001, 2003, 2004, 2005, 2006, 2007,
   3    2008, 2009, 2010
   4    Free Software Foundation, Inc.
   5
   6 This file is part of GCC.
   7
   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
  11 version.
  12
  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
  16 for more details.
  17
  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/>.  */
  21
  22 #ifndef GCC_TOPLEV_H
  23 #define GCC_TOPLEV_H
  24 #include "input.h"
  25 #include "bversion.h"
  26
  27 /* If non-NULL, return one past-the-end of the matching SUBPART of
  28    the WHOLE string.  */
  29 #define skip_leading_substring(whole,  part) \
  30    (strncmp (whole, part, strlen (part)) ? NULL : whole + strlen (part))
  31
  32 extern int toplev_main (int, char **);
  33 extern void strip_off_ending (char *, int);
  34 extern void rest_of_decl_compilation (tree, int, int);
  35 extern void rest_of_type_compilation (tree, int);
  36 extern void tree_rest_of_compilation (tree);
  37 extern void init_optimization_passes (void);
  38 extern void finish_optimization_passes (void);
  39 extern bool enable_rtl_dump_file (void);
  40
  41 /* In except.c.  Initialize exception handling.  This is used by the Ada
  42    and LTO front ends to initialize EH "on demand".  See lto-streamer-in.c
  43    and ada/gcc-interface/misc.c.  */
  44 extern void init_eh (void);
  45
  46 extern void announce_function (tree);
  47
  48 extern void warn_deprecated_use (tree, tree);
  49 extern bool parse_optimize_options (tree, bool);
  50
  51 #ifdef BUFSIZ
  52 extern void output_quoted_string        (FILE *, const char *);
  53 #endif
  54
  55 extern void wrapup_global_declaration_1 (tree);
  56 extern bool wrapup_global_declaration_2 (tree);
  57 extern bool wrapup_global_declarations (tree *, int);
  58 extern void check_global_declaration_1 (tree);
  59 extern void check_global_declarations (tree *, int);
  60 extern void emit_debug_global_declarations (tree *, int);
  61 extern void write_global_declarations (void);
  62
  63 extern void dump_memory_report (bool);
  64
  65 extern void target_reinit (void);
  66
  67 /* A unique local time stamp, might be zero if none is available.  */
  68 extern unsigned local_tick;
  69
  70 /* Top-level source file.  */
  71 extern const char *main_input_filename;
  72
  73 extern const char *dump_base_name;
  74 extern const char *dump_dir_name;
  75 extern const char *aux_base_name;
  76 extern const char *aux_info_file_name;
  77 extern const char *profile_data_prefix;
  78 extern const char *asm_file_name;
  79 extern bool exit_after_options;
  80
  81 /* True if the user has tagged the function with the 'section'
  82    attribute.  */
  83
  84 extern bool user_defined_section_attribute;
  85
  86 /* See toplev.c.  */
  87 extern int flag_rerun_cse_after_global_opts;
  88
  89 /* Things to do with target switches.  */
  90 extern void print_version (FILE *, const char *);
  91 extern void * default_get_pch_validity (size_t *);
  92 extern const char * default_pch_valid_p (const void *, size_t);
  93
  94 /* The hashtable, so that the C front ends can pass it to cpplib.  */
  95 extern struct ht *ident_hash;
  96
  97 /* This function can be used by targets to set the flags originally
  98     implied by -ffast-math and -fno-fast-math.  */
  99
 100 extern void set_fast_math_flags         (int);
 101
 102 extern void set_unsafe_math_optimizations_flags (int);
 103
 104 /* Handle -d switch.  */
 105 extern void decode_d_option             (const char *);
 106
 107 /* Return true iff flags are set as if -ffast-math.  */
 108 extern bool fast_math_flags_set_p       (void);
 109 extern bool fast_math_flags_struct_set_p (struct cl_optimization *);
 110
 111 /* Inline versions of the above for speed.  */
 112 #if GCC_VERSION < 3004
 113
 114 extern int clz_hwi (unsigned HOST_WIDE_INT x);
 115 extern int ctz_hwi (unsigned HOST_WIDE_INT x);
 116 extern int ffs_hwi (unsigned HOST_WIDE_INT x);
 117
 118 /* Return log2, or -1 if not exact.  */
 119 extern int exact_log2                  (unsigned HOST_WIDE_INT);
 120
 121 /* Return floor of log2, with -1 for zero.  */
 122 extern int floor_log2                  (unsigned HOST_WIDE_INT);
 123
 124 #else /* GCC_VERSION >= 3004 */
 125
 126 /* For convenience, define 0 -> word_size.  */
 127 static inline int
 128 clz_hwi (unsigned HOST_WIDE_INT x)
 129 {
 130   if (x == 0)
 131     return HOST_BITS_PER_WIDE_INT;
 132 # if HOST_BITS_PER_WIDE_INT == HOST_BITS_PER_LONG
 133   return __builtin_clzl (x);
 134 # elif HOST_BITS_PER_WIDE_INT == HOST_BITS_PER_LONGLONG
 135   return __builtin_clzll (x);
 136 # else
 137   return __builtin_clz (x);
 138 # endif
 139 }
 140
 141 static inline int
 142 ctz_hwi (unsigned HOST_WIDE_INT x)
 143 {
 144   if (x == 0)
 145     return HOST_BITS_PER_WIDE_INT;
 146 # if HOST_BITS_PER_WIDE_INT == HOST_BITS_PER_LONG
 147   return __builtin_ctzl (x);
 148 # elif HOST_BITS_PER_WIDE_INT == HOST_BITS_PER_LONGLONG
 149   return __builtin_ctzll (x);
 150 # else
 151   return __builtin_ctz (x);
 152 # endif
 153 }
 154
 155 static inline int
 156 ffs_hwi (unsigned HOST_WIDE_INT x)
 157 {
 158 # if HOST_BITS_PER_WIDE_INT == HOST_BITS_PER_LONG
 159   return __builtin_ffsl (x);
 160 # elif HOST_BITS_PER_WIDE_INT == HOST_BITS_PER_LONGLONG
 161   return __builtin_ffsll (x);
 162 # else
 163   return __builtin_ffs (x);
 164 # endif
 165 }
 166
 167 static inline int
 168 floor_log2 (unsigned HOST_WIDE_INT x)
 169 {
 170   return HOST_BITS_PER_WIDE_INT - 1 - clz_hwi (x);
 171 }
 172
 173 static inline int
 174 exact_log2 (unsigned HOST_WIDE_INT x)
 175 {
 176   return x == (x & -x) && x ? ctz_hwi (x) : -1;
 177 }
 178
 179 #endif /* GCC_VERSION >= 3004 */
 180
 181 /* Functions used to get and set GCC's notion of in what directory
 182    compilation was started.  */
 183
 184 extern const char *get_src_pwd         (void);
 185 extern bool set_src_pwd                (const char *);
 186
 187 /* Functions used to manipulate the random seed.  */
 188
 189 extern const char *get_random_seed (bool);
 190 extern const char *set_random_seed (const char *);
 191
 192 #endif /* ! GCC_TOPLEV_H */