gcc/opth-gen.awk

   1 #  Copyright (C) 2003,2004,2005,2006,2007,2008, 2010
   2 #  Free Software Foundation, Inc.
   3 #  Contributed by Kelley Cook, June 2004.
   4 #  Original code from Neil Booth, May 2003.
   5 #
   6 # This program is free software; you can redistribute it and/or modify it
   7 # under the terms of the GNU General Public License as published by the
   8 # Free Software Foundation; either version 3, or (at your option) any
   9 # later version.
  10 #
  11 # This program is distributed in the hope that it will be useful,
  12 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 # GNU General Public License for more details.
  15 #
  16 # You should have received a copy of the GNU General Public License
  17 # along with this program; see the file COPYING3.  If not see
  18 # <http://www.gnu.org/licenses/>.
  19
  20 # This Awk script reads in the option records generated from
  21 # opt-gather.awk, combines the flags of duplicate options and generates a
  22 # C header file.
  23 #
  24 # This program uses functions from opt-functions.awk
  25 # Usage: awk -f opt-functions.awk -f opth-gen.awk < inputfile > options.h
  26
  27 BEGIN {
  28         n_opts = 0
  29         n_langs = 0
  30         n_target_save = 0
  31         n_extra_masks = 0
  32         FS=SUBSEP
  33 }
  34
  35 # Collect the text and flags of each option into an array
  36         {
  37                 if ($1 == "Language") {
  38                         langs[n_langs] = $2
  39                         n_langs++;
  40                 }
  41                 else if ($1 == "TargetSave") {
  42                         # Make sure the declarations are put in source order
  43                         target_save_decl[n_target_save] = $2
  44                         n_target_save++
  45                 }
  46                 else {
  47                         name = opt_args("Mask", $1)
  48                         if (name == "") {
  49                                 opts[n_opts]  = $1
  50                                 flags[n_opts] = $2
  51                                 help[n_opts]  = $3
  52                                 n_opts++;
  53                         }
  54                         else {
  55                                 extra_masks[n_extra_masks++] = name
  56                         }
  57                 }
  58         }
  59
  60 # Dump out an enumeration into a .h file.
  61 # Combine the flags of duplicate options.
  62 END {
  63 print "/* This file is auto-generated by opth-gen.awk.  */"
  64 print ""
  65 print "#ifndef OPTIONS_H"
  66 print "#define OPTIONS_H"
  67 print ""
  68 print "extern int target_flags;"
  69 print "extern int target_flags_explicit;"
  70 print ""
  71
  72 have_save = 0;
  73
  74 for (i = 0; i < n_opts; i++) {
  75         if (flag_set_p("Save", flags[i]))
  76                 have_save = 1;
  77
  78         name = var_name(flags[i]);
  79         if (name == "")
  80                 continue;
  81
  82         if (name in var_seen)
  83                 continue;
  84
  85         var_seen[name] = 1;
  86         print "extern " var_type(flags[i]) name ";"
  87 }
  88 print ""
  89
  90 # All of the optimization switches gathered together so they can be saved and restored.
  91 # This will allow attribute((cold)) to turn on space optimization.
  92
  93 # Change the type of normal switches from int to unsigned char to save space.
  94 # Also, order the structure so that pointer fields occur first, then int
  95 # fields, and then char fields to provide the best packing.
  96
  97 print "#if !defined(GCC_DRIVER) && !defined(IN_LIBGCC2) && !defined(IN_TARGET_LIBS)"
  98 print ""
  99 print "/* Structure to save/restore optimization and target specific options.  */";
 100 print "struct GTY(()) cl_optimization";
 101 print "{";
 102
 103 n_opt_char = 2;
 104 n_opt_short = 0;
 105 n_opt_int = 0;
 106 n_opt_other = 0;
 107 var_opt_char[0] = "unsigned char optimize";
 108 var_opt_char[1] = "unsigned char optimize_size";
 109
 110 for (i = 0; i < n_opts; i++) {
 111         if (flag_set_p("Optimization", flags[i])) {
 112                 name = var_name(flags[i])
 113                 if(name == "")
 114                         continue;
 115
 116                 if(name in var_opt_seen)
 117                         continue;
 118
 119                 var_opt_seen[name]++;
 120                 otype = var_type_struct(flags[i]);
 121                 if (otype ~ "^((un)?signed +)?int *$")
 122                         var_opt_int[n_opt_int++] = otype name;
 123
 124                 else if (otype ~ "^((un)?signed +)?short *$")
 125                         var_opt_short[n_opt_short++] = otype name;
 126
 127                 else if (otype ~ "^((un)?signed +)?char *$")
 128                         var_opt_char[n_opt_char++] = otype name;
 129
 130                 else
 131                         var_opt_other[n_opt_other++] = otype name;
 132         }
 133 }
 134
 135 for (i = 0; i < n_opt_other; i++) {
 136         print "  " var_opt_other[i] ";";
 137 }
 138
 139 for (i = 0; i < n_opt_int; i++) {
 140         print "  " var_opt_int[i] ";";
 141 }
 142
 143 for (i = 0; i < n_opt_short; i++) {
 144         print "  " var_opt_short[i] ";";
 145 }
 146
 147 for (i = 0; i < n_opt_char; i++) {
 148         print "  " var_opt_char[i] ";";
 149 }
 150
 151 print "};";
 152 print "";
 153
 154 # Target and optimization save/restore/print functions.
 155 print "/* Structure to save/restore selected target specific options.  */";
 156 print "struct GTY(()) cl_target_option";
 157 print "{";
 158
 159 n_target_char = 0;
 160 n_target_short = 0;
 161 n_target_int = 0;
 162 n_target_other = 0;
 163
 164 for (i = 0; i < n_target_save; i++) {
 165         if (target_save_decl[i] ~ "^((un)?signed +)?int +[_a-zA-Z0-9]+$")
 166                 var_target_int[n_target_int++] = target_save_decl[i];
 167
 168         else if (target_save_decl[i] ~ "^((un)?signed +)?short +[_a-zA-Z0-9]+$")
 169                 var_target_short[n_target_short++] = target_save_decl[i];
 170
 171         else if (target_save_decl[i] ~ "^((un)?signed +)?char +[_a-zA-Z0-9]+$")
 172                 var_target_char[n_target_char++] = target_save_decl[i];
 173
 174         else
 175                 var_target_other[n_target_other++] = target_save_decl[i];
 176 }
 177
 178 if (have_save) {
 179         for (i = 0; i < n_opts; i++) {
 180                 if (flag_set_p("Save", flags[i])) {
 181                         name = var_name(flags[i])
 182                         if(name == "")
 183                                 name = "target_flags";
 184
 185                         if(name in var_save_seen)
 186                                 continue;
 187
 188                         var_save_seen[name]++;
 189                         otype = var_type_struct(flags[i])
 190                         if (otype ~ "^((un)?signed +)?int *$")
 191                                 var_target_int[n_target_int++] = otype name;
 192
 193                         else if (otype ~ "^((un)?signed +)?short *$")
 194                                 var_target_short[n_target_short++] = otype name;
 195
 196                         else if (otype ~ "^((un)?signed +)?char *$")
 197                                 var_target_char[n_target_char++] = otype name;
 198
 199                         else
 200                                 var_target_other[n_target_other++] = otype name;
 201                 }
 202         }
 203 } else {
 204         var_target_int[n_target_int++] = "int target_flags";
 205 }
 206
 207 for (i = 0; i < n_target_other; i++) {
 208         print "  " var_target_other[i] ";";
 209 }
 210
 211 for (i = 0; i < n_target_int; i++) {
 212         print "  " var_target_int[i] ";";
 213 }
 214
 215 for (i = 0; i < n_target_short; i++) {
 216         print "  " var_target_short[i] ";";
 217 }
 218
 219 for (i = 0; i < n_target_char; i++) {
 220         print "  " var_target_char[i] ";";
 221 }
 222
 223 print "};";
 224 print "";
 225 print "";
 226 print "/* Save optimization variables into a structure.  */"
 227 print "extern void cl_optimization_save (struct cl_optimization *);";
 228 print "";
 229 print "/* Restore optimization variables from a structure.  */";
 230 print "extern void cl_optimization_restore (struct cl_optimization *);";
 231 print "";
 232 print "/* Print optimization variables from a structure.  */";
 233 print "extern void cl_optimization_print (FILE *, int, struct cl_optimization *);";
 234 print "";
 235 print "/* Save selected option variables into a structure.  */"
 236 print "extern void cl_target_option_save (struct cl_target_option *);";
 237 print "";
 238 print "/* Restore selected option variables from a structure.  */"
 239 print "extern void cl_target_option_restore (struct cl_target_option *);";
 240 print "";
 241 print "/* Print target option variables from a structure.  */";
 242 print "extern void cl_target_option_print (FILE *, int, struct cl_target_option *);";
 243 print "#endif";
 244 print "";
 245
 246 for (i = 0; i < n_opts; i++) {
 247         name = opt_args("Mask", flags[i])
 248         vname = var_name(flags[i])
 249         mask = "MASK_"
 250         if (vname != "") {
 251                 mask = "OPTION_MASK_"
 252         }
 253         if (name != "" && !flag_set_p("MaskExists", flags[i]))
 254                 print "#define " mask name " (1 << " masknum[vname]++ ")"
 255 }
 256 for (i = 0; i < n_extra_masks; i++) {
 257         print "#define MASK_" extra_masks[i] " (1 << " masknum[""]++ ")"
 258 }
 259
 260 for (var in masknum) {
 261         if (masknum[var] > 31) {
 262                 if (var == "")
 263                         print "#error too many target masks"
 264                 else
 265                         print "#error too many masks for " var
 266         }
 267 }
 268 print ""
 269
 270 for (i = 0; i < n_opts; i++) {
 271         name = opt_args("Mask", flags[i])
 272         vname = var_name(flags[i])
 273         macro = "OPTION_"
 274         mask = "OPTION_MASK_"
 275         if (vname == "") {
 276                 vname = "target_flags"
 277                 macro = "TARGET_"
 278                 mask = "MASK_"
 279         }
 280         if (name != "" && !flag_set_p("MaskExists", flags[i]))
 281                 print "#define " macro name \
 282                       " ((" vname " & " mask name ") != 0)"
 283 }
 284 for (i = 0; i < n_extra_masks; i++) {
 285         print "#define TARGET_" extra_masks[i] \
 286               " ((target_flags & MASK_" extra_masks[i] ") != 0)"
 287 }
 288 print ""
 289
 290 for (i = 0; i < n_opts; i++) {
 291         opt = opt_args("InverseMask", flags[i])
 292         if (opt ~ ",") {
 293                 vname = var_name(flags[i])
 294                 macro = "OPTION_"
 295                 mask = "OPTION_MASK_"
 296                 if (vname == "") {
 297                         vname = "target_flags"
 298                         macro = "TARGET_"
 299                         mask = "MASK_"
 300                 }
 301                 print "#define " macro nth_arg(1, opt) \
 302                       " ((" vname " & " mask nth_arg(0, opt) ") == 0)"
 303         }
 304 }
 305 print ""
 306
 307 for (i = 0; i < n_langs; i++) {
 308         macros[i] = "CL_" langs[i]
 309         gsub( "[^A-Za-z0-9_]", "X", macros[i] )
 310         s = substr("            ", length (macros[i]))
 311         print "#define " macros[i] s " (1 << " i ")"
 312     }
 313 print "#define CL_LANG_ALL   ((1 << " n_langs ") - 1)"
 314
 315 print ""
 316 print "enum opt_code"
 317 print "{"
 318
 319 for (i = 0; i < n_opts; i++)
 320         back_chain[i] = "N_OPTS";
 321
 322 enum_value = 0
 323 for (i = 0; i < n_opts; i++) {
 324         # Combine the flags of identical switches.  Switches
 325         # appear many times if they are handled by many front
 326         # ends, for example.
 327         while( i + 1 != n_opts && opts[i] == opts[i + 1] ) {
 328                 flags[i + 1] = flags[i] " " flags[i + 1];
 329                 i++;
 330         }
 331
 332         len = length (opts[i]);
 333         enum = opt_enum(opts[i])
 334         enum_string = enum " = " enum_value ","
 335
 336         # Aliases do not get enumeration names.
 337         if ((flag_set_p("Alias.*", flags[i]) \
 338              && !flag_set_p("SeparateAlias", flags[i])) \
 339             || flag_set_p("Ignore", flags[i])) {
 340                 enum_string = "/* " enum_string " */"
 341         }
 342
 343         # If this switch takes joined arguments, back-chain all
 344         # subsequent switches to it for which it is a prefix.  If
 345         # a later switch S is a longer prefix of a switch T, T
 346         # will be back-chained to S in a later iteration of this
 347         # for() loop, which is what we want.
 348         if (flag_set_p("Joined.*", flags[i])) {
 349                 for (j = i + 1; j < n_opts; j++) {
 350                         if (substr (opts[j], 1, len) != opts[i])
 351                                 break;
 352                         back_chain[j] = enum;
 353                 }
 354         }
 355
 356         s = substr("                                          ",
 357                    length (enum_string))
 358
 359         if (help[i] == "")
 360                 hlp = "0"
 361         else
 362                 hlp = "N_(\"" help[i] "\")";
 363
 364         print "  " enum_string s "/* -" opts[i] " */"
 365         enum_value++
 366 }
 367
 368 print "  N_OPTS,"
 369 print "  OPT_SPECIAL_unknown,"
 370 print "  OPT_SPECIAL_ignore,"
 371 print "  OPT_SPECIAL_program_name,"
 372 print "  OPT_SPECIAL_input_file"
 373 print "};"
 374 print ""
 375 print "#endif /* OPTIONS_H */"
 376 }