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 /* Decoded options, and number of such options.  */
  33 extern struct cl_decoded_option *save_decoded_options;
  34 extern unsigned int save_decoded_options_count;
  35
  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);
  44
  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);
  49
  50 extern void announce_function (tree);
  51
  52 extern void warn_deprecated_use (tree, tree);
  53 extern bool parse_optimize_options (tree, bool);
  54
  55 #ifdef BUFSIZ
  56 extern void output_quoted_string        (FILE *, const char *);
  57 #endif
  58
  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);
  66
  67 extern void dump_memory_report (bool);
  68
  69 extern void target_reinit (void);
  70
  71 /* A unique local time stamp, might be zero if none is available.  */
  72 extern unsigned local_tick;
  73
  74 /* Top-level source file.  */
  75 extern const char *main_input_filename;
  76
  77 extern const char *profile_data_prefix;
  78 extern bool exit_after_options;
  79
  80 /* True if the user has tagged the function with the 'section'
  81    attribute.  */
  82
  83 extern bool user_defined_section_attribute;
  84
  85 /* See toplev.c.  */
  86 extern int flag_rerun_cse_after_global_opts;
  87
  88 /* Things to do with target switches.  */
  89 extern void print_version (FILE *, const char *);
  90 extern void * default_get_pch_validity (size_t *);
  91 extern const char * default_pch_valid_p (const void *, size_t);
  92
  93 /* The hashtable, so that the C front ends can pass it to cpplib.  */
  94 extern struct ht *ident_hash;
  95
  96 /* Handle -d switch.  */
  97 extern void decode_d_option             (const char *);
  98
  99 /* Return true iff flags are set as if -ffast-math.  */
 100 extern bool fast_math_flags_set_p       (void);
 101 extern bool fast_math_flags_struct_set_p (struct cl_optimization *);
 102
 103 /* Inline versions of the above for speed.  */
 104 #if GCC_VERSION < 3004
 105
 106 extern int clz_hwi (unsigned HOST_WIDE_INT x);
 107 extern int ctz_hwi (unsigned HOST_WIDE_INT x);
 108 extern int ffs_hwi (unsigned HOST_WIDE_INT x);
 109
 110 /* Return log2, or -1 if not exact.  */
 111 extern int exact_log2                  (unsigned HOST_WIDE_INT);
 112
 113 /* Return floor of log2, with -1 for zero.  */
 114 extern int floor_log2                  (unsigned HOST_WIDE_INT);
 115
 116 #else /* GCC_VERSION >= 3004 */
 117
 118 /* For convenience, define 0 -> word_size.  */
 119 static inline int
 120 clz_hwi (unsigned HOST_WIDE_INT x)
 121 {
 122   if (x == 0)
 123     return HOST_BITS_PER_WIDE_INT;
 124 # if HOST_BITS_PER_WIDE_INT == HOST_BITS_PER_LONG
 125   return __builtin_clzl (x);
 126 # elif HOST_BITS_PER_WIDE_INT == HOST_BITS_PER_LONGLONG
 127   return __builtin_clzll (x);
 128 # else
 129   return __builtin_clz (x);
 130 # endif
 131 }
 132
 133 static inline int
 134 ctz_hwi (unsigned HOST_WIDE_INT x)
 135 {
 136   if (x == 0)
 137     return HOST_BITS_PER_WIDE_INT;
 138 # if HOST_BITS_PER_WIDE_INT == HOST_BITS_PER_LONG
 139   return __builtin_ctzl (x);
 140 # elif HOST_BITS_PER_WIDE_INT == HOST_BITS_PER_LONGLONG
 141   return __builtin_ctzll (x);
 142 # else
 143   return __builtin_ctz (x);
 144 # endif
 145 }
 146
 147 static inline int
 148 ffs_hwi (unsigned HOST_WIDE_INT x)
 149 {
 150 # if HOST_BITS_PER_WIDE_INT == HOST_BITS_PER_LONG
 151   return __builtin_ffsl (x);
 152 # elif HOST_BITS_PER_WIDE_INT == HOST_BITS_PER_LONGLONG
 153   return __builtin_ffsll (x);
 154 # else
 155   return __builtin_ffs (x);
 156 # endif
 157 }
 158
 159 static inline int
 160 floor_log2 (unsigned HOST_WIDE_INT x)
 161 {
 162   return HOST_BITS_PER_WIDE_INT - 1 - clz_hwi (x);
 163 }
 164
 165 static inline int
 166 exact_log2 (unsigned HOST_WIDE_INT x)
 167 {
 168   return x == (x & -x) && x ? ctz_hwi (x) : -1;
 169 }
 170
 171 #endif /* GCC_VERSION >= 3004 */
 172
 173 /* Functions used to get and set GCC's notion of in what directory
 174    compilation was started.  */
 175
 176 extern const char *get_src_pwd         (void);
 177 extern bool set_src_pwd                (const char *);
 178
 179 /* Functions used to manipulate the random seed.  */
 180
 181 extern const char *get_random_seed (bool);
 182 extern const char *set_random_seed (const char *);
 183
 184 #endif /* ! GCC_TOPLEV_H */