gcc/flag-types.h

   1 /* Compilation switch flag type definitions for GCC.
   2    Copyright (C) 1987-2013 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 #ifndef GCC_FLAG_TYPES_H
  21 #define GCC_FLAG_TYPES_H
  22
  23 enum debug_info_type
  24 {
  25   NO_DEBUG,         /* Write no debug info.  */
  26   DBX_DEBUG,        /* Write BSD .stabs for DBX (using dbxout.c).  */
  27   SDB_DEBUG,        /* Write COFF for (old) SDB (using sdbout.c).  */
  28   DWARF2_DEBUG,     /* Write Dwarf v2 debug info (using dwarf2out.c).  */
  29   XCOFF_DEBUG,      /* Write IBM/Xcoff debug info (using dbxout.c).  */
  30   VMS_DEBUG,        /* Write VMS debug info (using vmsdbgout.c).  */
  31   VMS_AND_DWARF2_DEBUG /* Write VMS debug info (using vmsdbgout.c).
  32                           and DWARF v2 debug info (using dwarf2out.c).  */
  33 };
  34
  35 enum debug_info_levels
  36 {
  37   DINFO_LEVEL_NONE,     /* Write no debugging info.  */
  38   DINFO_LEVEL_TERSE,    /* Write minimal info to support tracebacks only.  */
  39   DINFO_LEVEL_NORMAL,   /* Write info for all declarations (and line table).  */
  40   DINFO_LEVEL_VERBOSE   /* Write normal info plus #define/#undef info.  */
  41 };
  42
  43 /* A major contribution to object and executable size is debug
  44    information size.  A major contribution to debug information
  45    size is struct descriptions replicated in several object files.
  46    The following function determines whether or not debug information
  47    should be generated for a given struct.  The indirect parameter
  48    indicates that the struct is being handled indirectly, via
  49    a pointer.  See opts.c for the implementation. */
  50
  51 enum debug_info_usage
  52 {
  53   DINFO_USAGE_DFN,      /* A struct definition. */
  54   DINFO_USAGE_DIR_USE,  /* A direct use, such as the type of a variable. */
  55   DINFO_USAGE_IND_USE,  /* An indirect use, such as through a pointer. */
  56   DINFO_USAGE_NUM_ENUMS /* The number of enumerators. */
  57 };
  58
  59 /* A major contribution to object and executable size is debug
  60    information size.  A major contribution to debug information size
  61    is struct descriptions replicated in several object files. The
  62    following flags attempt to reduce this information.  The basic
  63    idea is to not emit struct debugging information in the current
  64    compilation unit when that information will be generated by
  65    another compilation unit.
  66
  67    Debug information for a struct defined in the current source
  68    file should be generated in the object file.  Likewise the
  69    debug information for a struct defined in a header should be
  70    generated in the object file of the corresponding source file.
  71    Both of these case are handled when the base name of the file of
  72    the struct definition matches the base name of the source file
  73    of the current compilation unit.  This matching emits minimal
  74    struct debugging information.
  75
  76    The base file name matching rule above will fail to emit debug
  77    information for structs defined in system headers.  So a second
  78    category of files includes system headers in addition to files
  79    with matching bases.
  80
  81    The remaining types of files are library headers and application
  82    headers.  We cannot currently distinguish these two types.  */
  83
  84 enum debug_struct_file
  85 {
  86   DINFO_STRUCT_FILE_NONE,   /* Debug no structs. */
  87   DINFO_STRUCT_FILE_BASE,   /* Debug structs defined in files with the
  88                                same base name as the compilation unit. */
  89   DINFO_STRUCT_FILE_SYS,    /* Also debug structs defined in system
  90                                header files.  */
  91   DINFO_STRUCT_FILE_ANY     /* Debug structs defined in all files. */
  92 };
  93
  94 /* Enumerate visibility settings.  This is deliberately ordered from most
  95    to least visibility.  */
  96 #ifndef SYMBOL_VISIBILITY_DEFINED
  97 #define SYMBOL_VISIBILITY_DEFINED
  98 enum symbol_visibility
  99 {
 100   VISIBILITY_DEFAULT,
 101   VISIBILITY_PROTECTED,
 102   VISIBILITY_HIDDEN,
 103   VISIBILITY_INTERNAL
 104 };
 105 #endif
 106
 107 /* The stack reuse level.  */
 108 enum stack_reuse_level
 109 {
 110   SR_NONE,
 111   SR_NAMED_VARS,
 112   SR_ALL
 113 };
 114
 115 /* The algorithm used for the integrated register allocator (IRA).  */
 116 enum ira_algorithm
 117 {
 118   IRA_ALGORITHM_CB,
 119   IRA_ALGORITHM_PRIORITY
 120 };
 121
 122 /* The regions used for the integrated register allocator (IRA).  */
 123 enum ira_region
 124 {
 125   IRA_REGION_ONE,
 126   IRA_REGION_ALL,
 127   IRA_REGION_MIXED,
 128   /* This value means that there were no options -fira-region on the
 129      command line and that we should choose a value depending on the
 130      used -O option.  */
 131   IRA_REGION_AUTODETECT
 132 };
 133
 134 /* The options for excess precision.  */
 135 enum excess_precision
 136 {
 137   EXCESS_PRECISION_DEFAULT,
 138   EXCESS_PRECISION_FAST,
 139   EXCESS_PRECISION_STANDARD
 140 };
 141
 142 /* Type of stack check.  */
 143 enum stack_check_type
 144 {
 145   /* Do not check the stack.  */
 146   NO_STACK_CHECK = 0,
 147
 148   /* Check the stack generically, i.e. assume no specific support
 149      from the target configuration files.  */
 150   GENERIC_STACK_CHECK,
 151
 152   /* Check the stack and rely on the target configuration files to
 153      check the static frame of functions, i.e. use the generic
 154      mechanism only for dynamic stack allocations.  */
 155   STATIC_BUILTIN_STACK_CHECK,
 156
 157   /* Check the stack and entirely rely on the target configuration
 158      files, i.e. do not use the generic mechanism at all.  */
 159   FULL_BUILTIN_STACK_CHECK
 160 };
 161
 162 /* Names for the different levels of -Wstrict-overflow=N.  The numeric
 163    values here correspond to N.  */
 164
 165 enum warn_strict_overflow_code
 166 {
 167   /* Overflow warning that should be issued with -Wall: a questionable
 168      construct that is easy to avoid even when using macros.  Example:
 169      folding (x + CONSTANT > x) to 1.  */
 170   WARN_STRICT_OVERFLOW_ALL = 1,
 171   /* Overflow warning about folding a comparison to a constant because
 172      of undefined signed overflow, other than cases covered by
 173      WARN_STRICT_OVERFLOW_ALL.  Example: folding (abs (x) >= 0) to 1
 174      (this is false when x == INT_MIN).  */
 175   WARN_STRICT_OVERFLOW_CONDITIONAL = 2,
 176   /* Overflow warning about changes to comparisons other than folding
 177      them to a constant.  Example: folding (x + 1 > 1) to (x > 0).  */
 178   WARN_STRICT_OVERFLOW_COMPARISON = 3,
 179   /* Overflow warnings not covered by the above cases.  Example:
 180      folding ((x * 10) / 5) to (x * 2).  */
 181   WARN_STRICT_OVERFLOW_MISC = 4,
 182   /* Overflow warnings about reducing magnitude of constants in
 183      comparison.  Example: folding (x + 2 > y) to (x + 1 >= y).  */
 184   WARN_STRICT_OVERFLOW_MAGNITUDE = 5
 185 };
 186
 187 /* Floating-point contraction mode.  */
 188 enum fp_contract_mode {
 189   FP_CONTRACT_OFF = 0,
 190   FP_CONTRACT_ON = 1,
 191   FP_CONTRACT_FAST = 2
 192 };
 193
 194 #endif /* ! GCC_FLAG_TYPES_H */