1 | /* Compilation switch flag definitions for GNU CC. |
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2 | Copyright (C) 1987, 1988, 1994, 1995 Free Software Foundation, Inc. |
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3 | |
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4 | This file is part of GNU CC. |
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5 | |
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6 | GNU CC is free software; you can redistribute it and/or modify |
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7 | it under the terms of the GNU General Public License as published by |
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8 | the Free Software Foundation; either version 2, or (at your option) |
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9 | any later version. |
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10 | |
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11 | GNU CC is distributed in the hope that it will be useful, |
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12 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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14 | GNU General Public License for more details. |
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15 | |
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16 | You should have received a copy of the GNU General Public License |
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17 | along with GNU CC; see the file COPYING. If not, write to |
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18 | the Free Software Foundation, 59 Temple Place - Suite 330, |
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19 | Boston, MA 02111-1307, USA. */ |
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20 | |
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21 | /* Name of the input .c file being compiled. */ |
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22 | extern char *main_input_filename; |
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23 | |
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24 | enum debug_info_type |
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25 | { |
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26 | NO_DEBUG, /* Write no debug info. */ |
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27 | DBX_DEBUG, /* Write BSD .stabs for DBX (using dbxout.c). */ |
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28 | SDB_DEBUG, /* Write COFF for (old) SDB (using sdbout.c). */ |
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29 | DWARF_DEBUG, /* Write Dwarf debug info (using dwarfout.c). */ |
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30 | XCOFF_DEBUG /* Write IBM/Xcoff debug info (using dbxout.c). */ |
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31 | }; |
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32 | |
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33 | /* Specify which kind of debugging info to generate. */ |
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34 | extern enum debug_info_type write_symbols; |
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35 | |
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36 | enum debug_info_level |
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37 | { |
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38 | DINFO_LEVEL_NONE, /* Write no debugging info. */ |
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39 | DINFO_LEVEL_TERSE, /* Write minimal info to support tracebacks only. */ |
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40 | DINFO_LEVEL_NORMAL, /* Write info for all declarations (and line table). */ |
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41 | DINFO_LEVEL_VERBOSE /* Write normal info plus #define/#undef info. */ |
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42 | }; |
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43 | |
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44 | /* Specify how much debugging info to generate. */ |
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45 | extern enum debug_info_level debug_info_level; |
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46 | |
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47 | /* Nonzero means use GNU-only extensions in the generated symbolic |
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48 | debugging information. */ |
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49 | extern int use_gnu_debug_info_extensions; |
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50 | |
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51 | /* Nonzero means do optimizations. -opt. */ |
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52 | |
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53 | extern int optimize; |
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54 | |
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55 | /* Nonzero means do stupid register allocation. -noreg. |
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56 | Currently, this is 1 if `optimize' is 0. */ |
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57 | |
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58 | extern int obey_regdecls; |
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59 | |
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60 | /* Don't print functions as they are compiled and don't print |
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61 | times taken by the various passes. -quiet. */ |
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62 | |
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63 | extern int quiet_flag; |
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64 | |
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65 | /* Don't print warning messages. -w. */ |
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66 | |
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67 | extern int inhibit_warnings; |
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68 | |
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69 | /* Do print extra warnings (such as for uninitialized variables). -W. */ |
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70 | |
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71 | extern int extra_warnings; |
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72 | |
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73 | /* Nonzero to warn about unused local variables. */ |
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74 | |
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75 | extern int warn_unused; |
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76 | |
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77 | /* Nonzero means warn if inline function is too large. */ |
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78 | |
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79 | extern int warn_inline; |
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80 | |
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81 | /* Nonzero to warn about variables used before they are initialized. */ |
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82 | |
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83 | extern int warn_uninitialized; |
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84 | |
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85 | /* Nonzero means warn about all declarations which shadow others. */ |
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86 | |
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87 | extern int warn_shadow; |
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88 | |
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89 | /* Warn if a switch on an enum fails to have a case for every enum value. */ |
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90 | |
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91 | extern int warn_switch; |
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92 | |
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93 | /* Nonzero means warn about function definitions that default the return type |
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94 | or that use a null return and have a return-type other than void. */ |
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95 | |
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96 | extern int warn_return_type; |
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97 | |
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98 | /* Nonzero means warn about pointer casts that increase the required |
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99 | alignment of the target type (and might therefore lead to a crash |
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100 | due to a misaligned access). */ |
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101 | |
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102 | extern int warn_cast_align; |
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103 | |
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104 | /* Nonzero means warn that dbx info for template class methods isn't fully |
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105 | supported yet. */ |
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106 | |
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107 | extern int warn_template_debugging; |
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108 | |
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109 | /* Nonzero means warn about any identifiers that match in the first N |
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110 | characters. The value N is in `id_clash_len'. */ |
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111 | |
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112 | extern int warn_id_clash; |
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113 | extern unsigned id_clash_len; |
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114 | |
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115 | /* Nonzero means warn about any objects definitions whose size is larger |
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116 | than N bytes. Also want about function definitions whose returned |
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117 | values are larger than N bytes. The value N is in `larger_than_size'. */ |
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118 | |
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119 | extern int warn_larger_than; |
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120 | extern unsigned larger_than_size; |
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121 | |
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122 | /* Warn if a function returns an aggregate, |
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123 | since there are often incompatible calling conventions for doing this. */ |
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124 | |
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125 | extern int warn_aggregate_return; |
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126 | |
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127 | /* Nonzero if generating code to do profiling. */ |
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128 | |
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129 | extern int profile_flag; |
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130 | |
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131 | /* Nonzero if generating code to do profiling on the basis of basic blocks. */ |
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132 | |
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133 | extern int profile_block_flag; |
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134 | |
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135 | /* Nonzero for -pedantic switch: warn about anything |
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136 | that standard C forbids. */ |
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137 | |
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138 | extern int pedantic; |
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139 | |
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140 | /* Temporarily suppress certain warnings. |
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141 | This is set while reading code from a system header file. */ |
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142 | |
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143 | extern int in_system_header; |
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144 | |
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145 | /* Nonzero for -dp: annotate the assembly with a comment describing the |
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146 | pattern and alternative used. */ |
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147 | |
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148 | extern int flag_print_asm_name; |
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149 | |
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150 | /* Now the symbols that are set with `-f' switches. */ |
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151 | |
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152 | /* Nonzero means `char' should be signed. */ |
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153 | |
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154 | extern int flag_signed_char; |
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155 | |
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156 | /* Nonzero means give an enum type only as many bytes as it needs. */ |
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157 | |
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158 | extern int flag_short_enums; |
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159 | |
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160 | /* Nonzero for -fcaller-saves: allocate values in regs that need to |
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161 | be saved across function calls, if that produces overall better code. |
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162 | Optional now, so people can test it. */ |
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163 | |
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164 | extern int flag_caller_saves; |
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165 | |
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166 | /* Nonzero for -fpcc-struct-return: return values the same way PCC does. */ |
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167 | |
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168 | extern int flag_pcc_struct_return; |
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169 | |
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170 | /* Nonzero for -fforce-mem: load memory value into a register |
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171 | before arithmetic on it. This makes better cse but slower compilation. */ |
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172 | |
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173 | extern int flag_force_mem; |
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174 | |
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175 | /* Nonzero for -fforce-addr: load memory address into a register before |
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176 | reference to memory. This makes better cse but slower compilation. */ |
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177 | |
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178 | extern int flag_force_addr; |
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179 | |
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180 | /* Nonzero for -fdefer-pop: don't pop args after each function call; |
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181 | instead save them up to pop many calls' args with one insns. */ |
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182 | |
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183 | extern int flag_defer_pop; |
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184 | |
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185 | /* Nonzero for -ffloat-store: don't allocate floats and doubles |
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186 | in extended-precision registers. */ |
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187 | |
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188 | extern int flag_float_store; |
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189 | |
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190 | /* Nonzero enables strength-reduction in loop.c. */ |
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191 | |
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192 | extern int flag_strength_reduce; |
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193 | |
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194 | /* Nonzero enables loop unrolling in unroll.c. Only loops for which the |
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195 | number of iterations can be calculated at compile-time (UNROLL_COMPLETELY, |
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196 | UNROLL_MODULO) or at run-time (preconditioned to be UNROLL_MODULO) are |
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197 | unrolled. */ |
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198 | |
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199 | extern int flag_unroll_loops; |
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200 | |
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201 | /* Nonzero enables loop unrolling in unroll.c. All loops are unrolled. |
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202 | This is generally not a win. */ |
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203 | |
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204 | extern int flag_unroll_all_loops; |
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205 | |
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206 | /* Nonzero for -fcse-follow-jumps: |
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207 | have cse follow jumps to do a more extensive job. */ |
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208 | |
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209 | extern int flag_cse_follow_jumps; |
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210 | |
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211 | /* Nonzero for -fcse-skip-blocks: |
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212 | have cse follow a branch around a block. */ |
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213 | |
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214 | extern int flag_cse_skip_blocks; |
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215 | |
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216 | /* Nonzero for -fexpensive-optimizations: |
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217 | perform miscellaneous relatively-expensive optimizations. */ |
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218 | extern int flag_expensive_optimizations; |
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219 | |
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220 | /* Nonzero for -fwritable-strings: |
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221 | store string constants in data segment and don't uniquize them. */ |
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222 | |
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223 | extern int flag_writable_strings; |
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224 | |
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225 | /* Nonzero means don't put addresses of constant functions in registers. |
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226 | Used for compiling the Unix kernel, where strange substitutions are |
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227 | done on the assembly output. */ |
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228 | |
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229 | extern int flag_no_function_cse; |
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230 | |
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231 | /* Nonzero for -fomit-frame-pointer: |
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232 | don't make a frame pointer in simple functions that don't require one. */ |
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233 | |
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234 | extern int flag_omit_frame_pointer; |
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235 | |
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236 | /* Nonzero to inhibit use of define_optimization peephole opts. */ |
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237 | |
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238 | extern int flag_no_peephole; |
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239 | |
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240 | /* Nonzero means all references through pointers are volatile. */ |
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241 | |
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242 | extern int flag_volatile; |
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243 | |
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244 | /* Nonzero means treat all global and extern variables as global. */ |
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245 | |
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246 | extern int flag_volatile_global; |
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247 | |
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248 | /* Nonzero allows GCC to violate some IEEE or ANSI rules regarding math |
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249 | operations in the interest of optimization. For example it allows |
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250 | GCC to assume arguments to sqrt are nonnegative numbers, allowing |
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251 | faster code for sqrt to be generated. */ |
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252 | |
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253 | extern int flag_fast_math; |
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254 | |
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255 | /* Nonzero means make functions that look like good inline candidates |
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256 | go inline. */ |
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257 | |
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258 | extern int flag_inline_functions; |
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259 | |
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260 | /* Nonzero for -fkeep-inline-functions: even if we make a function |
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261 | go inline everywhere, keep its definition around for debugging |
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262 | purposes. */ |
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263 | |
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264 | extern int flag_keep_inline_functions; |
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265 | |
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266 | /* Nonzero means that functions declared `inline' will be treated |
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267 | as `static'. Prevents generation of zillions of copies of unused |
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268 | static inline functions; instead, `inlines' are written out |
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269 | only when actually used. Used in conjunction with -g. Also |
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270 | does the right thing with #pragma interface. */ |
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271 | |
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272 | extern int flag_no_inline; |
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273 | |
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274 | /* Nonzero if we are only using compiler to check syntax errors. */ |
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275 | |
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276 | extern int flag_syntax_only; |
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277 | |
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278 | /* Nonzero means we should save auxiliary info into a .X file. */ |
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279 | |
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280 | extern int flag_gen_aux_info; |
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281 | |
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282 | /* Nonzero means make the text shared if supported. */ |
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283 | |
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284 | extern int flag_shared_data; |
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285 | |
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286 | /* flag_schedule_insns means schedule insns within basic blocks (before |
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287 | local_alloc). |
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288 | flag_schedule_insns_after_reload means schedule insns after |
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289 | global_alloc. */ |
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290 | |
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291 | extern int flag_schedule_insns; |
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292 | extern int flag_schedule_insns_after_reload; |
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293 | |
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294 | /* Nonzero means put things in delayed-branch slots if supported. */ |
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295 | |
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296 | extern int flag_delayed_branch; |
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297 | |
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298 | /* Nonzero means to run cleanups after CALL_EXPRs. */ |
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299 | |
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300 | extern int flag_short_temps; |
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301 | |
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302 | /* Nonzero means pretend it is OK to examine bits of target floats, |
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303 | even if that isn't true. The resulting code will have incorrect constants, |
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304 | but the same series of instructions that the native compiler would make. */ |
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305 | |
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306 | extern int flag_pretend_float; |
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307 | |
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308 | /* Nonzero means change certain warnings into errors. |
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309 | Usually these are warnings about failure to conform to some standard. */ |
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310 | |
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311 | extern int flag_pedantic_errors; |
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312 | |
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313 | /* Nonzero means generate position-independent code. |
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314 | This is not fully implemented yet. */ |
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315 | |
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316 | extern int flag_pic; |
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317 | |
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318 | /* Nonzero means place uninitialized global data in the bss section. */ |
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319 | |
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320 | extern int flag_no_common; |
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321 | |
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322 | /* -finhibit-size-directive inhibits output of .size for ELF. |
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323 | This is used only for compiling crtstuff.c, |
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324 | and it may be extended to other effects |
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325 | needed for crtstuff.c on other systems. */ |
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326 | extern int flag_inhibit_size_directive; |
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327 | |
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328 | /* -fverbose-asm causes extra commentary information to be produced in |
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329 | the generated assembly code (to make it more readable). This option |
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330 | is generally only of use to those who actually need to read the |
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331 | generated assembly code (perhaps while debugging the compiler itself). */ |
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332 | |
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333 | extern int flag_verbose_asm; |
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334 | |
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335 | /* -fgnu-linker specifies use of the GNU linker for initializations. |
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336 | -fno-gnu-linker says that collect will be used. */ |
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337 | extern int flag_gnu_linker; |
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338 | |
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339 | /* Tag all structures with __attribute__(packed) */ |
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340 | extern int flag_pack_struct; |
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341 | |
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342 | /* Other basic status info about current function. */ |
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343 | |
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344 | /* Nonzero means current function must be given a frame pointer. |
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345 | Set in stmt.c if anything is allocated on the stack there. |
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346 | Set in reload1.c if anything is allocated on the stack there. */ |
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347 | |
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348 | extern int frame_pointer_needed; |
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349 | |
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350 | /* Set nonzero if jump_optimize finds that control falls through |
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351 | at the end of the function. */ |
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352 | |
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353 | extern int can_reach_end; |
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354 | |
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355 | /* Nonzero if function being compiled receives nonlocal gotos |
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356 | from nested functions. */ |
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357 | |
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358 | extern int current_function_has_nonlocal_label; |
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359 | |
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360 | /* Nonzero if function being compiled has nonlocal gotos to parent |
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361 | function. */ |
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362 | |
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363 | extern int current_function_has_nonlocal_goto; |
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