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1 # Copyright (C) 2003,2004,2005,2006,2007,2008 Free Software Foundation, Inc.
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2 # Contributed by Kelley Cook, June 2004.
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3 # Original code from Neil Booth, May 2003.
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4 #
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5 # This program is free software; you can redistribute it and/or modify it
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6 # under the terms of the GNU General Public License as published by the
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7 # Free Software Foundation; either version 3, or (at your option) any
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8 # later version.
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9 #
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10 # This program is distributed in the hope that it will be useful,
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11 # but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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13 # GNU General Public License for more details.
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14 #
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15 # You should have received a copy of the GNU General Public License
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16 # along with this program; see the file COPYING3. If not see
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17 # <http://www.gnu.org/licenses/>.
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18
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19 # This Awk script reads in the option records generated from
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20 # opt-gather.awk, combines the flags of duplicate options and generates a
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21 # C header file.
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22 #
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23 # This program uses functions from opt-functions.awk
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24 # Usage: awk -f opt-functions.awk -f opth-gen.awk < inputfile > options.h
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25
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26 BEGIN {
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27 n_opts = 0
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28 n_langs = 0
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29 n_target_save = 0
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30 n_extra_masks = 0
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31 quote = "\042"
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32 comma = ","
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33 FS=SUBSEP
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34 }
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35
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36 # Collect the text and flags of each option into an array
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37 {
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38 if ($1 == "Language") {
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39 langs[n_langs] = $2
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40 n_langs++;
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41 }
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42 else if ($1 == "TargetSave") {
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43 # Make sure the declarations are put in source order
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44 target_save_decl[n_target_save] = $2
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45 n_target_save++
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46 }
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47 else {
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48 name = opt_args("Mask", $1)
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49 if (name == "") {
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50 opts[n_opts] = $1
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51 flags[n_opts] = $2
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52 help[n_opts] = $3
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53 n_opts++;
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54 }
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55 else {
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56 extra_masks[n_extra_masks++] = name
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57 }
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58 }
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59 }
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60
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61 # Dump out an enumeration into a .h file.
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62 # Combine the flags of duplicate options.
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63 END {
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64 print "/* This file is auto-generated by opth-gen.awk. */"
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65 print ""
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66 print "#ifndef OPTIONS_H"
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67 print "#define OPTIONS_H"
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68 print ""
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69 print "extern int target_flags;"
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70 print "extern int target_flags_explicit;"
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71 print ""
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72
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73 have_save = 0;
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74
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75 for (i = 0; i < n_opts; i++) {
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76 if (flag_set_p("Save", flags[i]))
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77 have_save = 1;
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78
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79 name = var_name(flags[i]);
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80 if (name == "")
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81 continue;
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82
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83 if (name in var_seen)
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84 continue;
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85
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86 var_seen[name] = 1;
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87 print "extern " var_type(flags[i]) name ";"
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88 }
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89 print ""
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90
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91 # All of the optimization switches gathered together so they can be saved and restored.
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92 # This will allow attribute((cold)) to turn on space optimization.
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93
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94 # Change the type of normal switches from int to unsigned char to save space.
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95 # Also, order the structure so that pointer fields occur first, then int
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96 # fields, and then char fields to provide the best packing.
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97
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98 print "#if !defined(GCC_DRIVER) && !defined(IN_LIBGCC2) && !defined(IN_TARGET_LIBS)"
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99 print ""
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100 print "/* Structure to save/restore optimization and target specific options. */";
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101 print "struct cl_optimization GTY(())";
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102 print "{";
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103
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104 n_opt_char = 2;
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105 n_opt_short = 0;
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106 n_opt_int = 0;
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107 n_opt_other = 0;
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108 var_opt_char[0] = "unsigned char optimize";
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109 var_opt_char[1] = "unsigned char optimize_size";
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110
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111 for (i = 0; i < n_opts; i++) {
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112 if (flag_set_p("Optimization", flags[i])) {
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113 name = var_name(flags[i])
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114 if(name == "")
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115 continue;
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116
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117 if(name in var_opt_seen)
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118 continue;
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119
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120 var_opt_seen[name]++;
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121 otype = var_type_struct(flags[i]);
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122 if (otype ~ "^((un)?signed +)?int *$")
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123 var_opt_int[n_opt_int++] = otype name;
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124
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125 else if (otype ~ "^((un)?signed +)?short *$")
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126 var_opt_short[n_opt_short++] = otype name;
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127
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128 else if (otype ~ "^((un)?signed +)?char *$")
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129 var_opt_char[n_opt_char++] = otype name;
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130
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131 else
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132 var_opt_other[n_opt_other++] = otype name;
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133 }
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134 }
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135
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136 for (i = 0; i < n_opt_other; i++) {
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137 print " " var_opt_other[i] ";";
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138 }
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139
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140 for (i = 0; i < n_opt_int; i++) {
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141 print " " var_opt_int[i] ";";
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142 }
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143
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144 for (i = 0; i < n_opt_short; i++) {
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145 print " " var_opt_short[i] ";";
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146 }
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147
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148 for (i = 0; i < n_opt_char; i++) {
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149 print " " var_opt_char[i] ";";
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150 }
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151
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152 print "};";
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153 print "";
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154
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155 # Target and optimization save/restore/print functions.
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156 print "/* Structure to save/restore selected target specific options. */";
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157 print "struct cl_target_option GTY(())";
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158 print "{";
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159
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160 n_target_char = 0;
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161 n_target_short = 0;
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162 n_target_int = 0;
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163 n_target_other = 0;
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164
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165 for (i = 0; i < n_target_save; i++) {
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166 if (target_save_decl[i] ~ "^((un)?signed +)?int +[_a-zA-Z0-9]+$")
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167 var_target_int[n_target_int++] = target_save_decl[i];
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168
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169 else if (target_save_decl[i] ~ "^((un)?signed +)?short +[_a-zA-Z0-9]+$")
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170 var_target_short[n_target_short++] = target_save_decl[i];
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171
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172 else if (target_save_decl[i] ~ "^((un)?signed +)?char +[_a-zA-Z0-9]+$")
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173 var_target_char[n_target_char++] = target_save_decl[i];
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174
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175 else
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176 var_target_other[n_target_other++] = target_save_decl[i];
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177 }
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178
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179 if (have_save) {
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180 for (i = 0; i < n_opts; i++) {
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181 if (flag_set_p("Save", flags[i])) {
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182 name = var_name(flags[i])
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183 if(name == "")
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184 name = "target_flags";
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185
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186 if(name in var_save_seen)
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187 continue;
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188
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189 var_save_seen[name]++;
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190 otype = var_type_struct(flags[i])
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191 if (otype ~ "^((un)?signed +)?int *$")
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192 var_target_int[n_target_int++] = otype name;
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193
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194 else if (otype ~ "^((un)?signed +)?short *$")
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195 var_target_short[n_target_short++] = otype name;
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196
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197 else if (otype ~ "^((un)?signed +)?char *$")
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198 var_target_char[n_target_char++] = otype name;
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199
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200 else
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201 var_target_other[n_target_other++] = otype name;
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202 }
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203 }
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204 } else {
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205 var_target_int[n_target_int++] = "int target_flags";
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206 }
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207
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208 for (i = 0; i < n_target_other; i++) {
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209 print " " var_target_other[i] ";";
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210 }
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211
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212 for (i = 0; i < n_target_int; i++) {
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213 print " " var_target_int[i] ";";
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214 }
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215
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216 for (i = 0; i < n_target_short; i++) {
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217 print " " var_target_short[i] ";";
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218 }
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219
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220 for (i = 0; i < n_target_char; i++) {
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221 print " " var_target_char[i] ";";
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222 }
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223
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224 print "};";
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225 print "";
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226 print "";
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227 print "/* Save optimization variables into a structure. */"
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228 print "extern void cl_optimization_save (struct cl_optimization *);";
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229 print "";
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230 print "/* Restore optimization variables from a structure. */";
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231 print "extern void cl_optimization_restore (struct cl_optimization *);";
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232 print "";
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233 print "/* Print optimization variables from a structure. */";
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234 print "extern void cl_optimization_print (FILE *, int, struct cl_optimization *);";
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235 print "";
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236 print "/* Save selected option variables into a structure. */"
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237 print "extern void cl_target_option_save (struct cl_target_option *);";
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238 print "";
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239 print "/* Restore selected option variables from a structure. */"
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240 print "extern void cl_target_option_restore (struct cl_target_option *);";
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241 print "";
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242 print "/* Print target option variables from a structure. */";
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243 print "extern void cl_target_option_print (FILE *, int, struct cl_target_option *);";
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244 print "#endif";
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245 print "";
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246
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247 for (i = 0; i < n_opts; i++) {
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248 name = opt_args("Mask", flags[i])
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249 vname = var_name(flags[i])
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250 mask = "MASK_"
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251 if (vname != "") {
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252 mask = "OPTION_MASK_"
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253 }
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254 if (name != "" && !flag_set_p("MaskExists", flags[i]))
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255 print "#define " mask name " (1 << " masknum[vname]++ ")"
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256 }
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257 for (i = 0; i < n_extra_masks; i++) {
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258 print "#define MASK_" extra_masks[i] " (1 << " masknum[""]++ ")"
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259 }
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260
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261 for (var in masknum) {
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262 if (masknum[var] > 31) {
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263 if (var == "")
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264 print "#error too many target masks"
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265 else
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266 print "#error too many masks for " var
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267 }
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268 }
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269 print ""
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270
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271 for (i = 0; i < n_opts; i++) {
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272 name = opt_args("Mask", flags[i])
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273 vname = var_name(flags[i])
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274 macro = "OPTION_"
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275 mask = "OPTION_MASK_"
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276 if (vname == "") {
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277 vname = "target_flags"
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278 macro = "TARGET_"
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279 mask = "MASK_"
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280 }
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281 if (name != "" && !flag_set_p("MaskExists", flags[i]))
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282 print "#define " macro name \
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283 " ((" vname " & " mask name ") != 0)"
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284 }
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285 for (i = 0; i < n_extra_masks; i++) {
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286 print "#define TARGET_" extra_masks[i] \
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287 " ((target_flags & MASK_" extra_masks[i] ") != 0)"
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288 }
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289 print ""
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290
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291 for (i = 0; i < n_opts; i++) {
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292 opt = opt_args("InverseMask", flags[i])
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293 if (opt ~ ",") {
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294 vname = var_name(flags[i])
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295 macro = "OPTION_"
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296 mask = "OPTION_MASK_"
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297 if (vname == "") {
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298 vname = "target_flags"
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299 macro = "TARGET_"
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300 mask = "MASK_"
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301 }
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302 print "#define " macro nth_arg(1, opt) \
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303 " ((" vname " & " mask nth_arg(0, opt) ") == 0)"
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304 }
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305 }
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306 print ""
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307
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308 for (i = 0; i < n_langs; i++) {
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309 macros[i] = "CL_" langs[i]
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310 gsub( "[^A-Za-z0-9_]", "X", macros[i] )
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311 s = substr(" ", length (macros[i]))
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312 print "#define " macros[i] s " (1 << " i ")"
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313 }
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314 print "#define CL_LANG_ALL ((1 << " n_langs ") - 1)"
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315
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316 print ""
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317 print "enum opt_code"
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318 print "{"
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319
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320 for (i = 0; i < n_opts; i++)
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321 back_chain[i] = "N_OPTS";
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322
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323 for (i = 0; i < n_opts; i++) {
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324 # Combine the flags of identical switches. Switches
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325 # appear many times if they are handled by many front
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326 # ends, for example.
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327 while( i + 1 != n_opts && opts[i] == opts[i + 1] ) {
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328 flags[i + 1] = flags[i] " " flags[i + 1];
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329 i++;
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330 }
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331
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332 len = length (opts[i]);
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333 enum = "OPT_" opts[i]
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334 if (opts[i] == "finline-limit=" || opts[i] == "Wlarger-than=")
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335 enum = enum "eq"
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336 gsub ("[^A-Za-z0-9]", "_", enum)
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337
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338 # If this switch takes joined arguments, back-chain all
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339 # subsequent switches to it for which it is a prefix. If
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340 # a later switch S is a longer prefix of a switch T, T
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341 # will be back-chained to S in a later iteration of this
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342 # for() loop, which is what we want.
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343 if (flag_set_p("Joined.*", flags[i])) {
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344 for (j = i + 1; j < n_opts; j++) {
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345 if (substr (opts[j], 1, len) != opts[i])
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346 break;
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347 back_chain[j] = enum;
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348 }
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349 }
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350
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351 s = substr(" ", length (opts[i]))
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352 if (i + 1 == n_opts)
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353 comma = ""
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354
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355 if (help[i] == "")
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356 hlp = "0"
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357 else
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358 hlp = "N_(\"" help[i] "\")";
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359
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360 print " " enum "," s "/* -" opts[i] " */"
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361 }
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362
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363 print " N_OPTS"
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364 print "};"
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365 print ""
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366 print "#endif /* OPTIONS_H */"
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367 }
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