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_vars = 0
  32         n_extra_target_vars = 0
  33         n_extra_masks = 0
  34         n_extra_c_includes = 0
  35         n_extra_h_includes = 0
  36         have_save = 0;
  37         quote = "\042"
  38         FS=SUBSEP
  39 }
  40
  41 # Collect the text and flags of each option into an array
  42         {
  43                 if ($1 == "Language") {
  44                         langs[n_langs] = $2
  45                         n_langs++;
  46                 }
  47                 else if ($1 == "TargetSave") {
  48                         # Make sure the declarations are put in source order
  49                         target_save_decl[n_target_save] = $2
  50                         n_target_save++
  51                 }
  52                 else if ($1 == "Variable") {
  53                         extra_vars[n_extra_vars] = $2
  54                         n_extra_vars++
  55                 }
  56                 else if ($1 == "TargetVariable") {
  57                         # Combination of TargetSave and Variable
  58                         extra_vars[n_extra_vars] = $2
  59                         n_extra_vars++
  60
  61                         var = $2
  62                         sub(" *=.*", "", var)
  63                         orig_var = var
  64                         name = var
  65                         type = var
  66                         sub("^.*[ *]", "", name)
  67                         sub(" *" name "$", "", type)
  68                         target_save_decl[n_target_save] = type " x_" name
  69                         n_target_save++
  70
  71                         extra_target_vars[n_extra_target_vars] = name
  72                         n_extra_target_vars++
  73                 }
  74                 else if ($1 == "HeaderInclude") {
  75                         extra_h_includes[n_extra_h_includes++] = $2;
  76                 }
  77                 else if ($1 == "SourceInclude")  {
  78                         extra_c_includes[n_extra_c_includes++] = $2;
  79                 }
  80                 else {
  81                         name = opt_args("Mask", $1)
  82                         if (name == "") {
  83                                 opts[n_opts]  = $1
  84                                 flags[n_opts] = $2
  85                                 help[n_opts]  = $3
  86                                 n_opts++;
  87                         }
  88                         else {
  89                                 extra_masks[n_extra_masks++] = name
  90                         }
  91                 }
  92         }
  93
  94 # Dump out an enumeration into a .h file.
  95 # Combine the flags of duplicate options.
  96 END {
  97 print "/* This file is auto-generated by opth-gen.awk.  */"
  98 print ""
  99 print "#ifndef OPTIONS_H"
 100 print "#define OPTIONS_H"
 101 print ""
 102 print "#include \"flag-types.h\""
 103 print ""
 104
 105 if (n_extra_h_includes > 0) {
 106         for (i = 0; i < n_extra_h_includes; i++) {
 107                 print "#include " quote extra_h_includes[i] quote
 108         }
 109         print ""
 110 }
 111
 112 print "#if !defined(IN_LIBGCC2) && !defined(IN_TARGET_LIBS) && !defined(IN_RTS)"
 113 print "#ifndef GENERATOR_FILE"
 114 print "#if !defined(GCC_DRIVER) && !defined(IN_LIBGCC2) && !defined(IN_TARGET_LIBS)"
 115 print "struct GTY(()) gcc_options"
 116 print "#else"
 117 print "struct gcc_options"
 118 print "#endif"
 119 print "{"
 120 print "#endif"
 121
 122 for (i = 0; i < n_extra_vars; i++) {
 123         var = extra_vars[i]
 124         sub(" *=.*", "", var)
 125         orig_var = var
 126         name = var
 127         type = var
 128         type_after = var
 129         sub("^.*[ *]", "", name)
 130         sub("\\[.*\\]$", "", name)
 131         sub("\\[.*\\]$", "", type)
 132         sub(" *" name "$", "", type)
 133         sub("^.*" name, "", type_after)
 134         var_seen[name] = 1
 135         print "#ifdef GENERATOR_FILE"
 136         print "extern " orig_var ";"
 137         print "#else"
 138         print "  " type " x_" name type_after ";"
 139         print "#define " name " global_options.x_" name
 140         print "#endif"
 141 }
 142
 143 for (i = 0; i < n_opts; i++) {
 144         if (flag_set_p("Save", flags[i]))
 145                 have_save = 1;
 146
 147         name = var_name(flags[i]);
 148         if (name == "")
 149                 continue;
 150
 151         if (name in var_seen)
 152                 continue;
 153
 154         var_seen[name] = 1;
 155         print "#ifdef GENERATOR_FILE"
 156         print "extern " var_type(flags[i]) name ";"
 157         print "#else"
 158         print "  " var_type(flags[i]) "x_" name ";"
 159         print "#define " name " global_options.x_" name
 160         print "#endif"
 161 }
 162 for (i = 0; i < n_opts; i++) {
 163         name = static_var(opts[i], flags[i]);
 164         if (name != "") {
 165                 print "#ifndef GENERATOR_FILE"
 166                 print "  " var_type(flags[i]) "x_" name ";"
 167                 print "#define x_" name " do_not_use"
 168                 print "#endif"
 169         }
 170 }
 171 print "#ifndef GENERATOR_FILE"
 172 print "};"
 173 print "extern struct gcc_options global_options;"
 174 print "extern const struct gcc_options global_options_init;"
 175 print "extern struct gcc_options global_options_set;"
 176 print "#define target_flags_explicit global_options_set.x_target_flags"
 177 print "#endif"
 178 print "#endif"
 179 print ""
 180
 181 # All of the optimization switches gathered together so they can be saved and restored.
 182 # This will allow attribute((cold)) to turn on space optimization.
 183
 184 # Change the type of normal switches from int to unsigned char to save space.
 185 # Also, order the structure so that pointer fields occur first, then int
 186 # fields, and then char fields to provide the best packing.
 187
 188 print "#if !defined(GCC_DRIVER) && !defined(IN_LIBGCC2) && !defined(IN_TARGET_LIBS)"
 189 print ""
 190 print "/* Structure to save/restore optimization and target specific options.  */";
 191 print "struct GTY(()) cl_optimization";
 192 print "{";
 193
 194 n_opt_char = 2;
 195 n_opt_short = 0;
 196 n_opt_int = 0;
 197 n_opt_enum = 1;
 198 n_opt_other = 0;
 199 var_opt_char[0] = "unsigned char x_optimize";
 200 var_opt_char[1] = "unsigned char x_optimize_size";
 201 var_opt_enum[0] = "enum fp_contract_mode x_flag_fp_contract_mode";
 202
 203 for (i = 0; i < n_opts; i++) {
 204         if (flag_set_p("Optimization", flags[i])) {
 205                 name = var_name(flags[i])
 206                 if(name == "")
 207                         continue;
 208
 209                 if(name in var_opt_seen)
 210                         continue;
 211
 212                 var_opt_seen[name]++;
 213                 otype = var_type_struct(flags[i]);
 214                 if (otype ~ "^((un)?signed +)?int *$")
 215                         var_opt_int[n_opt_int++] = otype "x_" name;
 216
 217                 else if (otype ~ "^((un)?signed +)?short *$")
 218                         var_opt_short[n_opt_short++] = otype "x_" name;
 219
 220                 else if (otype ~ "^((un)?signed +)?char *$")
 221                         var_opt_char[n_opt_char++] = otype "x_" name;
 222
 223                 else if (otype ~ ("^enum +[_" alnum "]+ *$"))
 224                         var_opt_enum[n_opt_enum++] = otype "x_" name;
 225
 226                 else
 227                         var_opt_other[n_opt_other++] = otype "x_" name;
 228         }
 229 }
 230
 231 for (i = 0; i < n_opt_other; i++) {
 232         print "  " var_opt_other[i] ";";
 233 }
 234
 235 for (i = 0; i < n_opt_int; i++) {
 236         print "  " var_opt_int[i] ";";
 237 }
 238
 239 for (i = 0; i < n_opt_enum; i++) {
 240         print "  " var_opt_enum[i] ";";
 241 }
 242
 243 for (i = 0; i < n_opt_short; i++) {
 244         print "  " var_opt_short[i] ";";
 245 }
 246
 247 for (i = 0; i < n_opt_char; i++) {
 248         print "  " var_opt_char[i] ";";
 249 }
 250
 251 print "};";
 252 print "";
 253
 254 # Target and optimization save/restore/print functions.
 255 print "/* Structure to save/restore selected target specific options.  */";
 256 print "struct GTY(()) cl_target_option";
 257 print "{";
 258
 259 n_target_char = 0;
 260 n_target_short = 0;
 261 n_target_int = 0;
 262 n_target_enum = 0;
 263 n_target_other = 0;
 264
 265 for (i = 0; i < n_target_save; i++) {
 266         if (target_save_decl[i] ~ "^((un)?signed +)?int +[_" alnum "]+$")
 267                 var_target_int[n_target_int++] = target_save_decl[i];
 268
 269         else if (target_save_decl[i] ~ "^((un)?signed +)?short +[_" alnum "]+$")
 270                 var_target_short[n_target_short++] = target_save_decl[i];
 271
 272         else if (target_save_decl[i] ~ "^((un)?signed +)?char +[_ " alnum "]+$")
 273                 var_target_char[n_target_char++] = target_save_decl[i];
 274
 275         else if (target_save_decl[i] ~ ("^enum +[_" alnum "]+ +[_" alnum "]+$")) {
 276                 var_target_enum[n_target_enum++] = target_save_decl[i];
 277         }
 278         else
 279                 var_target_other[n_target_other++] = target_save_decl[i];
 280 }
 281
 282 if (have_save) {
 283         for (i = 0; i < n_opts; i++) {
 284                 if (flag_set_p("Save", flags[i])) {
 285                         name = var_name(flags[i])
 286                         if(name == "")
 287                                 name = "target_flags";
 288
 289                         if(name in var_save_seen)
 290                                 continue;
 291
 292                         var_save_seen[name]++;
 293                         otype = var_type_struct(flags[i])
 294                         if (otype ~ "^((un)?signed +)?int *$")
 295                                 var_target_int[n_target_int++] = otype "x_" name;
 296
 297                         else if (otype ~ "^((un)?signed +)?short *$")
 298                                 var_target_short[n_target_short++] = otype "x_" name;
 299
 300                         else if (otype ~ "^((un)?signed +)?char *$")
 301                                 var_target_char[n_target_char++] = otype "x_" name;
 302
 303                         else if (otype ~ ("^enum +[_" alnum "]+ +[_" alnum "]+"))
 304                                 var_target_enum[n_target_enum++] = otype "x_" name;
 305
 306                         else
 307                                 var_target_other[n_target_other++] = otype "x_" name;
 308                 }
 309         }
 310 } else {
 311         var_target_int[n_target_int++] = "int x_target_flags";
 312 }
 313
 314 for (i = 0; i < n_target_other; i++) {
 315         print "  " var_target_other[i] ";";
 316 }
 317
 318 for (i = 0; i < n_target_enum; i++) {
 319         print "  " var_target_enum[i] ";";
 320 }
 321
 322 for (i = 0; i < n_target_int; i++) {
 323         print "  " var_target_int[i] ";";
 324 }
 325
 326 for (i = 0; i < n_target_short; i++) {
 327         print "  " var_target_short[i] ";";
 328 }
 329
 330 for (i = 0; i < n_target_char; i++) {
 331         print "  " var_target_char[i] ";";
 332 }
 333
 334 print "};";
 335 print "";
 336 print "";
 337 print "/* Save optimization variables into a structure.  */"
 338 print "extern void cl_optimization_save (struct cl_optimization *, struct gcc_options *);";
 339 print "";
 340 print "/* Restore optimization variables from a structure.  */";
 341 print "extern void cl_optimization_restore (struct gcc_options *, struct cl_optimization *);";
 342 print "";
 343 print "/* Print optimization variables from a structure.  */";
 344 print "extern void cl_optimization_print (FILE *, int, struct cl_optimization *);";
 345 print "";
 346 print "/* Save selected option variables into a structure.  */"
 347 print "extern void cl_target_option_save (struct cl_target_option *, struct gcc_options *);";
 348 print "";
 349 print "/* Restore selected option variables from a structure.  */"
 350 print "extern void cl_target_option_restore (struct gcc_options *, struct cl_target_option *);";
 351 print "";
 352 print "/* Print target option variables from a structure.  */";
 353 print "extern void cl_target_option_print (FILE *, int, struct cl_target_option *);";
 354 print "#endif";
 355 print "";
 356
 357 for (i = 0; i < n_opts; i++) {
 358         name = opt_args("Mask", flags[i])
 359         vname = var_name(flags[i])
 360         mask = "MASK_"
 361         if (vname != "") {
 362                 mask = "OPTION_MASK_"
 363         }
 364         if (name != "" && !flag_set_p("MaskExists", flags[i]))
 365                 print "#define " mask name " (1 << " masknum[vname]++ ")"
 366 }
 367 for (i = 0; i < n_extra_masks; i++) {
 368         print "#define MASK_" extra_masks[i] " (1 << " masknum[""]++ ")"
 369 }
 370
 371 for (var in masknum) {
 372         if (masknum[var] > 31) {
 373                 if (var == "")
 374                         print "#error too many target masks"
 375                 else
 376                         print "#error too many masks for " var
 377         }
 378 }
 379 print ""
 380
 381 for (i = 0; i < n_opts; i++) {
 382         name = opt_args("Mask", flags[i])
 383         vname = var_name(flags[i])
 384         macro = "OPTION_"
 385         mask = "OPTION_MASK_"
 386         if (vname == "") {
 387                 vname = "target_flags"
 388                 macro = "TARGET_"
 389                 mask = "MASK_"
 390         }
 391         if (name != "" && !flag_set_p("MaskExists", flags[i]))
 392                 print "#define " macro name \
 393                       " ((" vname " & " mask name ") != 0)"
 394 }
 395 for (i = 0; i < n_extra_masks; i++) {
 396         print "#define TARGET_" extra_masks[i] \
 397               " ((target_flags & MASK_" extra_masks[i] ") != 0)"
 398 }
 399 print ""
 400
 401 for (i = 0; i < n_opts; i++) {
 402         opt = opt_args("InverseMask", flags[i])
 403         if (opt ~ ",") {
 404                 vname = var_name(flags[i])
 405                 macro = "OPTION_"
 406                 mask = "OPTION_MASK_"
 407                 if (vname == "") {
 408                         vname = "target_flags"
 409                         macro = "TARGET_"
 410                         mask = "MASK_"
 411                 }
 412                 print "#define " macro nth_arg(1, opt) \
 413                       " ((" vname " & " mask nth_arg(0, opt) ") == 0)"
 414         }
 415 }
 416 print ""
 417
 418 for (i = 0; i < n_langs; i++) {
 419         macros[i] = "CL_" langs[i]
 420         gsub( "[^" alnum "_]", "X", macros[i] )
 421         s = substr("            ", length (macros[i]))
 422         print "#define " macros[i] s " (1 << " i ")"
 423     }
 424 print "#define CL_LANG_ALL   ((1 << " n_langs ") - 1)"
 425
 426 print ""
 427 print "enum opt_code"
 428 print "{"
 429
 430 for (i = 0; i < n_opts; i++)
 431         back_chain[i] = "N_OPTS";
 432
 433 enum_value = 0
 434 for (i = 0; i < n_opts; i++) {
 435         # Combine the flags of identical switches.  Switches
 436         # appear many times if they are handled by many front
 437         # ends, for example.
 438         while( i + 1 != n_opts && opts[i] == opts[i + 1] ) {
 439                 flags[i + 1] = flags[i] " " flags[i + 1];
 440                 i++;
 441         }
 442
 443         len = length (opts[i]);
 444         enum = opt_enum(opts[i])
 445         enum_string = enum " = " enum_value ","
 446
 447         # Aliases do not get enumeration names.
 448         if ((flag_set_p("Alias.*", flags[i]) \
 449              && !flag_set_p("SeparateAlias", flags[i])) \
 450             || flag_set_p("Ignore", flags[i])) {
 451                 enum_string = "/* " enum_string " */"
 452         }
 453
 454         # If this switch takes joined arguments, back-chain all
 455         # subsequent switches to it for which it is a prefix.  If
 456         # a later switch S is a longer prefix of a switch T, T
 457         # will be back-chained to S in a later iteration of this
 458         # for() loop, which is what we want.
 459         if (flag_set_p("Joined.*", flags[i])) {
 460                 for (j = i + 1; j < n_opts; j++) {
 461                         if (substr (opts[j], 1, len) != opts[i])
 462                                 break;
 463                         back_chain[j] = enum;
 464                 }
 465         }
 466
 467         s = substr("                                          ",
 468                    length (enum_string))
 469
 470         if (help[i] == "")
 471                 hlp = "0"
 472         else
 473                 hlp = "N_(\"" help[i] "\")";
 474
 475         print "  " enum_string s "/* -" opts[i] " */"
 476         enum_value++
 477 }
 478
 479 print "  N_OPTS,"
 480 print "  OPT_SPECIAL_unknown,"
 481 print "  OPT_SPECIAL_ignore,"
 482 print "  OPT_SPECIAL_program_name,"
 483 print "  OPT_SPECIAL_input_file"
 484 print "};"
 485 print ""
 486 print "#endif /* OPTIONS_H */"
 487 }