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