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 rest_of_decl_compilation (tree, int, int);
  38 extern void rest_of_type_compilation (tree, int);
  39 extern void tree_rest_of_compilation (tree);
  40 extern void init_optimization_passes (void);
  41 extern void finish_optimization_passes (void);
  42 extern bool enable_rtl_dump_file (void);
  43
  44 /* In except.c.  Initialize exception handling.  This is used by the Ada
  45    and LTO front ends to initialize EH "on demand".  See lto-streamer-in.c
  46    and ada/gcc-interface/misc.c.  */
  47 extern void init_eh (void);
  48
  49 extern void announce_function (tree);
  50
  51 extern void warn_deprecated_use (tree, tree);
  52 extern bool parse_optimize_options (tree, bool);
  53
  54 #ifdef BUFSIZ
  55 extern void output_quoted_string        (FILE *, const char *);
  56 #endif
  57
  58 extern void wrapup_global_declaration_1 (tree);
  59 extern bool wrapup_global_declaration_2 (tree);
  60 extern bool wrapup_global_declarations (tree *, int);
  61 extern void check_global_declaration_1 (tree);
  62 extern void check_global_declarations (tree *, int);
  63 extern void emit_debug_global_declarations (tree *, int);
  64 extern void write_global_declarations (void);
  65
  66 extern void dump_memory_report (bool);
  67
  68 extern void target_reinit (void);
  69
  70 /* A unique local time stamp, might be zero if none is available.  */
  71 extern unsigned local_tick;
  72
  73 /* Top-level source file.  */
  74 extern const char *main_input_filename;
  75 extern const char *main_input_basename;
  76 extern int main_input_baselength;
  77
  78 /* True if the user has tagged the function with the 'section'
  79    attribute.  */
  80
  81 extern bool user_defined_section_attribute;
  82
  83 /* See toplev.c.  */
  84 extern int flag_rerun_cse_after_global_opts;
  85
  86 /* Things to do with target switches.  */
  87 extern void print_version (FILE *, const char *);
  88 extern void * default_get_pch_validity (size_t *);
  89 extern const char * default_pch_valid_p (const void *, size_t);
  90
  91 /* The hashtable, so that the C front ends can pass it to cpplib.  */
  92 extern struct ht *ident_hash;
  93
  94 /* Inline versions of the above for speed.  */
  95 #if GCC_VERSION < 3004
  96
  97 extern int clz_hwi (unsigned HOST_WIDE_INT x);
  98 extern int ctz_hwi (unsigned HOST_WIDE_INT x);
  99 extern int ffs_hwi (unsigned HOST_WIDE_INT x);
 100
 101 /* Return log2, or -1 if not exact.  */
 102 extern int exact_log2                  (unsigned HOST_WIDE_INT);
 103
 104 /* Return floor of log2, with -1 for zero.  */
 105 extern int floor_log2                  (unsigned HOST_WIDE_INT);
 106
 107 #else /* GCC_VERSION >= 3004 */
 108
 109 /* For convenience, define 0 -> word_size.  */
 110 static inline int
 111 clz_hwi (unsigned HOST_WIDE_INT x)
 112 {
 113   if (x == 0)
 114     return HOST_BITS_PER_WIDE_INT;
 115 # if HOST_BITS_PER_WIDE_INT == HOST_BITS_PER_LONG
 116   return __builtin_clzl (x);
 117 # elif HOST_BITS_PER_WIDE_INT == HOST_BITS_PER_LONGLONG
 118   return __builtin_clzll (x);
 119 # else
 120   return __builtin_clz (x);
 121 # endif
 122 }
 123
 124 static inline int
 125 ctz_hwi (unsigned HOST_WIDE_INT x)
 126 {
 127   if (x == 0)
 128     return HOST_BITS_PER_WIDE_INT;
 129 # if HOST_BITS_PER_WIDE_INT == HOST_BITS_PER_LONG
 130   return __builtin_ctzl (x);
 131 # elif HOST_BITS_PER_WIDE_INT == HOST_BITS_PER_LONGLONG
 132   return __builtin_ctzll (x);
 133 # else
 134   return __builtin_ctz (x);
 135 # endif
 136 }
 137
 138 static inline int
 139 ffs_hwi (unsigned HOST_WIDE_INT x)
 140 {
 141 # if HOST_BITS_PER_WIDE_INT == HOST_BITS_PER_LONG
 142   return __builtin_ffsl (x);
 143 # elif HOST_BITS_PER_WIDE_INT == HOST_BITS_PER_LONGLONG
 144   return __builtin_ffsll (x);
 145 # else
 146   return __builtin_ffs (x);
 147 # endif
 148 }
 149
 150 static inline int
 151 floor_log2 (unsigned HOST_WIDE_INT x)
 152 {
 153   return HOST_BITS_PER_WIDE_INT - 1 - clz_hwi (x);
 154 }
 155
 156 static inline int
 157 exact_log2 (unsigned HOST_WIDE_INT x)
 158 {
 159   return x == (x & -x) && x ? ctz_hwi (x) : -1;
 160 }
 161
 162 #endif /* GCC_VERSION >= 3004 */
 163
 164 /* Functions used to get and set GCC's notion of in what directory
 165    compilation was started.  */
 166
 167 extern const char *get_src_pwd         (void);
 168 extern bool set_src_pwd                (const char *);
 169
 170 /* Functions used to manipulate the random seed.  */
 171
 172 extern const char *get_random_seed (bool);
 173 extern const char *set_random_seed (const char *);
 174
 175 #endif /* ! GCC_TOPLEV_H */