gcc/opth-gen.awk

   1 #  Copyright (C) 2003-2020 Free Software Foundation, Inc.
   2 #  Contributed by Kelley Cook, June 2004.
   3 #  Original code from Neil Booth, May 2003.
   4 #
   5 # This program is free software; you can redistribute it and/or modify it
   6 # under the terms of the GNU General Public License as published by the
   7 # Free Software Foundation; either version 3, or (at your option) any
   8 # later version.
   9 #
  10 # This program is distributed in the hope that it will be useful,
  11 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 # GNU General Public License for more details.
  14 #
  15 # You should have received a copy of the GNU General Public License
  16 # along with this program; see the file COPYING3.  If not see
  17 # <http://www.gnu.org/licenses/>.
  18
  19 # This Awk script reads in the option records generated from
  20 # opt-gather.awk, combines the flags of duplicate options and generates a
  21 # C header file.
  22 #
  23 # This program uses functions from opt-functions.awk and code from
  24 # opt-read.awk.
  25 # Usage: awk -f opt-functions.awk -f opt-read.awk -f opth-gen.awk \
  26 #            < inputfile > options.h
  27
  28 # Dump out an enumeration into a .h file.
  29 # Combine the flags of duplicate options.
  30 END {
  31 print "/* This file is auto-generated by opth-gen.awk.  */"
  32 print ""
  33 print "#ifndef OPTIONS_H"
  34 print "#define OPTIONS_H"
  35 print ""
  36 print "#include \"flag-types.h\""
  37 print ""
  38
  39 if (n_extra_h_includes > 0) {
  40         for (i = 0; i < n_extra_h_includes; i++) {
  41                 print "#include " quote extra_h_includes[i] quote
  42         }
  43         print ""
  44 }
  45
  46 print "#if !defined(IN_LIBGCC2) && !defined(IN_TARGET_LIBS) && !defined(IN_RTS)"
  47 print "#ifndef GENERATOR_FILE"
  48 print "#if !defined(IN_LIBGCC2) && !defined(IN_TARGET_LIBS)"
  49 print "struct GTY(()) gcc_options"
  50 print "#else"
  51 print "struct gcc_options"
  52 print "#endif"
  53 print "{"
  54 print "#endif"
  55
  56 for (i = 0; i < n_extra_vars; i++) {
  57         var = extra_vars[i]
  58         sub(" *=.*", "", var)
  59         orig_var = var
  60         name = var
  61         type = var
  62         type_after = var
  63         sub("^.*[ *]", "", name)
  64         sub("\\[.*\\]$", "", name)
  65         sub("\\[.*\\]$", "", type)
  66         sub(" *" name "$", "", type)
  67         sub("^.*" name, "", type_after)
  68         var_seen[name] = 1
  69         print "#ifdef GENERATOR_FILE"
  70         print "extern " orig_var ";"
  71         print "#else"
  72         print "  " type " x_" name type_after ";"
  73         print "#define " name " global_options.x_" name
  74         print "#endif"
  75 }
  76
  77 for (i = 0; i < n_opts; i++) {
  78         if (flag_set_p("Save", flags[i]))
  79                 have_save = 1;
  80
  81         name = var_name(flags[i]);
  82         if (name == "")
  83                 continue;
  84
  85         if (name in var_seen)
  86                 continue;
  87
  88         var_seen[name] = 1;
  89         print "#ifdef GENERATOR_FILE"
  90         print "extern " var_type(flags[i]) name ";"
  91         print "#else"
  92         print "  " var_type(flags[i]) "x_" name ";"
  93         print "#define " name " global_options.x_" name
  94         print "#endif"
  95 }
  96 for (i = 0; i < n_opts; i++) {
  97         name = static_var(opts[i], flags[i]);
  98         if (name != "") {
  99                 print "#ifndef GENERATOR_FILE"
 100                 print "  " var_type(flags[i]) "x_" name ";"
 101                 print "#define x_" name " do_not_use"
 102                 print "#endif"
 103         }
 104 }
 105 for (i = 0; i < n_opts; i++) {
 106         if (flag_set_p("SetByCombined", flags[i])) {
 107                 print "#ifndef GENERATOR_FILE"
 108                 print "  bool frontend_set_" var_name(flags[i]) ";"
 109                 print "#endif"
 110         }
 111 }
 112 print "#ifndef GENERATOR_FILE"
 113 print "};"
 114 print "extern struct gcc_options global_options;"
 115 print "extern const struct gcc_options global_options_init;"
 116 print "extern struct gcc_options global_options_set;"
 117 print "#define target_flags_explicit global_options_set.x_target_flags"
 118 print "#endif"
 119 print "#endif"
 120 print ""
 121
 122 # All of the optimization switches gathered together so they can be saved and restored.
 123 # This will allow attribute((cold)) to turn on space optimization.
 124
 125 # Change the type of normal switches from int to unsigned char to save space.
 126 # Also, order the structure so that pointer fields occur first, then int
 127 # fields, and then char fields to provide the best packing.
 128
 129 print "#if !defined(IN_LIBGCC2) && !defined(IN_TARGET_LIBS) && !defined(IN_RTS)"
 130 print ""
 131 print "/* Structure to save/restore optimization and target specific options.  */";
 132 print "struct GTY(()) cl_optimization";
 133 print "{";
 134
 135 n_opt_char = 4;
 136 n_opt_short = 0;
 137 n_opt_int = 0;
 138 n_opt_enum = 0;
 139 n_opt_other = 0;
 140 n_opt_explicit = 4;
 141 var_opt_char[0] = "unsigned char x_optimize";
 142 var_opt_char[1] = "unsigned char x_optimize_size";
 143 var_opt_char[2] = "unsigned char x_optimize_debug";
 144 var_opt_char[3] = "unsigned char x_optimize_fast";
 145
 146 for (i = 0; i < n_opts; i++) {
 147         if (flag_set_p("(Optimization|PerFunction)", flags[i])) {
 148                 name = var_name(flags[i])
 149                 if(name == "")
 150                         continue;
 151
 152                 if(name in var_opt_seen)
 153                         continue;
 154
 155                 var_opt_seen[name]++;
 156                 n_opt_explicit++;
 157                 otype = var_type_struct(flags[i]);
 158                 if (otype ~ "^((un)?signed +)?int *$")
 159                         var_opt_int[n_opt_int++] = otype "x_" name;
 160
 161                 else if (otype ~ "^((un)?signed +)?short *$")
 162                         var_opt_short[n_opt_short++] = otype "x_" name;
 163
 164                 else if (otype ~ "^((un)?signed +)?char *$")
 165                         var_opt_char[n_opt_char++] = otype "x_" name;
 166
 167                 else if (otype ~ ("^enum +[_" alnum "]+ *$"))
 168                         var_opt_enum[n_opt_enum++] = otype "x_" name;
 169
 170                 else
 171                         var_opt_other[n_opt_other++] = otype "x_" name;
 172         }
 173 }
 174
 175 for (i = 0; i < n_opt_other; i++) {
 176         print "  " var_opt_other[i] ";";
 177 }
 178
 179 for (i = 0; i < n_opt_int; i++) {
 180         print "  " var_opt_int[i] ";";
 181 }
 182
 183 for (i = 0; i < n_opt_enum; i++) {
 184         print "  " var_opt_enum[i] ";";
 185 }
 186
 187 for (i = 0; i < n_opt_short; i++) {
 188         print "  " var_opt_short[i] ";";
 189 }
 190
 191 for (i = 0; i < n_opt_char; i++) {
 192         print "  " var_opt_char[i] ";";
 193 }
 194
 195 print "  /* " n_opt_explicit " members */";
 196 print "  unsigned HOST_WIDE_INT explicit_mask[" int ((n_opt_explicit + 63) / 64) "];";
 197
 198 print "};";
 199 print "";
 200
 201 # Target and optimization save/restore/print functions.
 202 print "/* Structure to save/restore selected target specific options.  */";
 203 print "struct GTY(()) cl_target_option";
 204 print "{";
 205
 206 n_target_char = 0;
 207 n_target_short = 0;
 208 n_target_int = 0;
 209 n_target_enum = 0;
 210 n_target_other = 0;
 211 n_target_explicit = n_extra_target_vars;
 212 n_target_explicit_mask = 0;
 213
 214 for (i = 0; i < n_target_save; i++) {
 215         if (target_save_decl[i] ~ "^((un)?signed +)?int +[_" alnum "]+$")
 216                 var_target_int[n_target_int++] = target_save_decl[i];
 217
 218         else if (target_save_decl[i] ~ "^((un)?signed +)?short +[_" alnum "]+$")
 219                 var_target_short[n_target_short++] = target_save_decl[i];
 220
 221         else if (target_save_decl[i] ~ "^((un)?signed +)?char +[_ " alnum "]+$")
 222                 var_target_char[n_target_char++] = target_save_decl[i];
 223
 224         else if (target_save_decl[i] ~ ("^enum +[_" alnum "]+ +[_" alnum "]+$")) {
 225                 var_target_enum[n_target_enum++] = target_save_decl[i];
 226         }
 227         else
 228                 var_target_other[n_target_other++] = target_save_decl[i];
 229 }
 230
 231 if (have_save) {
 232         for (i = 0; i < n_opts; i++) {
 233                 if (flag_set_p("Save", flags[i])) {
 234                         name = var_name(flags[i])
 235                         if(name == "")
 236                                 name = "target_flags";
 237
 238                         if(name in var_save_seen)
 239                                 continue;
 240
 241                         var_save_seen[name]++;
 242                         n_target_explicit++;
 243                         otype = var_type_struct(flags[i])
 244
 245                         if (opt_args("Mask", flags[i]) != "" \
 246                             || opt_args("InverseMask", flags[i]))
 247                                 var_target_explicit_mask[n_target_explicit_mask++] \
 248                                     = otype "explicit_mask_" name;
 249
 250                         if (otype ~ "^((un)?signed +)?int *$")
 251                                 var_target_int[n_target_int++] = otype "x_" name;
 252
 253                         else if (otype ~ "^((un)?signed +)?short *$")
 254                                 var_target_short[n_target_short++] = otype "x_" name;
 255
 256                         else if (otype ~ "^((un)?signed +)?char *$")
 257                                 var_target_char[n_target_char++] = otype "x_" name;
 258
 259                         else if (otype ~ ("^enum +[_" alnum "]+ +[_" alnum "]+"))
 260                                 var_target_enum[n_target_enum++] = otype "x_" name;
 261
 262                         else
 263                                 var_target_other[n_target_other++] = otype "x_" name;
 264                 }
 265         }
 266 } else {
 267         var_target_int[n_target_int++] = "int x_target_flags";
 268         n_target_explicit++;
 269         var_target_explicit_mask[n_target_explicit_mask++] \
 270             = "int explicit_mask_target_flags";
 271 }
 272
 273 for (i = 0; i < n_target_other; i++) {
 274         print "  " var_target_other[i] ";";
 275 }
 276
 277 for (i = 0; i < n_target_enum; i++) {
 278         print "  " var_target_enum[i] ";";
 279 }
 280
 281 for (i = 0; i < n_target_int; i++) {
 282         print "  " var_target_int[i] ";";
 283 }
 284
 285 for (i = 0; i < n_target_short; i++) {
 286         print "  " var_target_short[i] ";";
 287 }
 288
 289 for (i = 0; i < n_target_char; i++) {
 290         print "  " var_target_char[i] ";";
 291 }
 292
 293 print "  /* " n_target_explicit - n_target_explicit_mask " members */";
 294 if (n_target_explicit > n_target_explicit_mask) {
 295         print "  unsigned HOST_WIDE_INT explicit_mask[" \
 296           int ((n_target_explicit - n_target_explicit_mask + 63) / 64) "];";
 297 }
 298
 299 for (i = 0; i < n_target_explicit_mask; i++) {
 300         print "  " var_target_explicit_mask[i] ";";
 301 }
 302
 303 print "};";
 304 print "";
 305 print "";
 306 print "/* Save optimization variables into a structure.  */"
 307 print "extern void cl_optimization_save (struct cl_optimization *, struct gcc_options *, struct gcc_options *);";
 308 print "";
 309 print "/* Restore optimization variables from a structure.  */";
 310 print "extern void cl_optimization_restore (struct gcc_options *, struct gcc_options *, struct cl_optimization *);";
 311 print "";
 312 print "/* Print optimization variables from a structure.  */";
 313 print "extern void cl_optimization_print (FILE *, int, struct cl_optimization *);";
 314 print "";
 315 print "/* Print different optimization variables from structures provided as arguments.  */";
 316 print "extern void cl_optimization_print_diff (FILE *, int, cl_optimization *ptr1, cl_optimization *ptr2);";
 317 print "";
 318 print "/* Save selected option variables into a structure.  */"
 319 print "extern void cl_target_option_save (struct cl_target_option *, struct gcc_options *, struct gcc_options *);";
 320 print "";
 321 print "/* Restore selected option variables from a structure.  */"
 322 print "extern void cl_target_option_restore (struct gcc_options *, struct gcc_options *, struct cl_target_option *);";
 323 print "";
 324 print "/* Print target option variables from a structure.  */";
 325 print "extern void cl_target_option_print (FILE *, int, struct cl_target_option *);";
 326 print "";
 327 print "/* Print different target option variables from structures provided as arguments.  */";
 328 print "extern void cl_target_option_print_diff (FILE *, int, cl_target_option *ptr1, cl_target_option *ptr2);";
 329 print "";
 330 print "/* Compare two target option variables from a structure.  */";
 331 print "extern bool cl_target_option_eq (const struct cl_target_option *, const struct cl_target_option *);";
 332 print "";
 333 print "/* Free heap memory used by target option variables.  */";
 334 print "extern void cl_target_option_free (struct cl_target_option *);";
 335 print "";
 336 print "/* Hash option variables from a structure.  */";
 337 print "extern hashval_t cl_target_option_hash (const struct cl_target_option *);";
 338 print "";
 339 print "/* Hash optimization from a structure.  */";
 340 print "extern hashval_t cl_optimization_hash (const struct cl_optimization *);";
 341 print "";
 342 print "/* Compare two optimization options.  */";
 343 print "extern bool cl_optimization_option_eq (cl_optimization const *ptr1, cl_optimization const *ptr2);"
 344 print "";
 345 print "/* Free heap memory used by optimization options.  */";
 346 print "extern void cl_optimization_option_free (cl_optimization *ptr1);"
 347 print "";
 348 print "/* Compare and report difference for a part of cl_optimization options.  */";
 349 print "extern void cl_optimization_compare (gcc_options *ptr1, gcc_options *ptr2);";
 350 print "";
 351 print "/* Generator files may not have access to location_t, and don't need these.  */"
 352 print "#if defined(UNKNOWN_LOCATION)"
 353 print "bool                                                                  "
 354 print "common_handle_option_auto (struct gcc_options *opts,                  "
 355 print "                           struct gcc_options *opts_set,              "
 356 print "                           const struct cl_decoded_option *decoded,   "
 357 print "                           unsigned int lang_mask, int kind,          "
 358 print "                           location_t loc,                            "
 359 print "                           const struct cl_option_handlers *handlers, "
 360 print "                           diagnostic_context *dc);                   "
 361 for (i = 0; i < n_langs; i++) {
 362     lang_name = lang_sanitized_name(langs[i]);
 363     print "bool"
 364     print lang_name "_handle_option_auto (struct gcc_options *opts,"
 365     print "                           struct gcc_options *opts_set,"
 366     print "                           size_t scode, const char *arg,"
 367     print "                           HOST_WIDE_INT value,"
 368     print "                           unsigned int lang_mask, int kind,"
 369     print "                           location_t loc,"
 370     print "                           const struct cl_option_handlers *handlers,"
 371     print "                           diagnostic_context *dc);"
 372 }
 373 print "void cpp_handle_option_auto (const struct gcc_options * opts, size_t scode,"
 374 print "                             struct cpp_options * cpp_opts);"
 375 print "void init_global_opts_from_cpp(struct gcc_options * opts,      "
 376 print "                               const struct cpp_options * cpp_opts);"
 377 print "#endif";
 378 print "#endif";
 379 print "";
 380
 381 for (i = 0; i < n_opts; i++) {
 382         name = opt_args("Mask", flags[i])
 383         if (name == "") {
 384                 opt = opt_args("InverseMask", flags[i])
 385                 if (opt ~ ",")
 386                         name = nth_arg(0, opt)
 387                 else
 388                         name = opt
 389         }
 390         if (name != "" && mask_bits[name] == 0) {
 391                 mask_bits[name] = 1
 392                 vname = var_name(flags[i])
 393                 mask = "MASK_"
 394                 mask_1 = "1U"
 395                 if (vname != "") {
 396                         mask = "OPTION_MASK_"
 397                         if (host_wide_int[vname] == "yes")
 398                                 mask_1 = "HOST_WIDE_INT_1U"
 399                 } else
 400                         extra_mask_bits[name] = 1
 401                 print "#define " mask name " (" mask_1 " << " masknum[vname]++ ")"
 402         }
 403 }
 404 for (i = 0; i < n_extra_masks; i++) {
 405         if (extra_mask_bits[extra_masks[i]] == 0)
 406                 print "#define MASK_" extra_masks[i] " (1U << " masknum[""]++ ")"
 407 }
 408
 409 for (var in masknum) {
 410         if (var != "" && host_wide_int[var] == "yes") {
 411                 print "#if defined(HOST_BITS_PER_WIDE_INT) && " masknum[var] " > HOST_BITS_PER_WIDE_INT"
 412                 print "#error too many masks for " var
 413                 print "#endif"
 414         }
 415         else if (masknum[var] > 32) {
 416                 if (var == "")
 417                         print "#error too many target masks"
 418                 else
 419                         print "#error too many masks for " var
 420         }
 421 }
 422 print ""
 423
 424 for (i = 0; i < n_opts; i++) {
 425         name = opt_args("Mask", flags[i])
 426         if (name == "") {
 427                 opt = opt_args("InverseMask", flags[i])
 428                 if (opt ~ ",")
 429                         name = nth_arg(0, opt)
 430                 else
 431                         name = opt
 432         }
 433         if (name != "" && mask_macros[name] == 0) {
 434                 mask_macros[name] = 1
 435                 vname = var_name(flags[i])
 436                 mask = "OPTION_MASK_"
 437                 if (vname == "") {
 438                         vname = "target_flags"
 439                         mask = "MASK_"
 440                         extra_mask_macros[name] = 1
 441                 }
 442                 print "#define TARGET_" name \
 443                       " ((" vname " & " mask name ") != 0)"
 444                 print "#define TARGET_" name "_P(" vname ")" \
 445                       " (((" vname ") & " mask name ") != 0)"
 446         }
 447 }
 448 for (i = 0; i < n_extra_masks; i++) {
 449         if (extra_mask_macros[extra_masks[i]] == 0)
 450                 print "#define TARGET_" extra_masks[i] \
 451                       " ((target_flags & MASK_" extra_masks[i] ") != 0)"
 452 }
 453 print ""
 454
 455 for (i = 0; i < n_opts; i++) {
 456         opt = opt_args("InverseMask", flags[i])
 457         if (opt ~ ",") {
 458                 vname = var_name(flags[i])
 459                 mask = "OPTION_MASK_"
 460                 if (vname == "") {
 461                         vname = "target_flags"
 462                         mask = "MASK_"
 463                 }
 464                 print "#define TARGET_" nth_arg(1, opt) \
 465                       " ((" vname " & " mask nth_arg(0, opt) ") == 0)"
 466         }
 467 }
 468 print ""
 469
 470 for (i = 0; i < n_langs; i++) {
 471         macros[i] = "CL_" lang_sanitized_name(langs[i])
 472         s = substr("            ", length (macros[i]))
 473         print "#define " macros[i] s " (1U << " i ")"
 474     }
 475 print "#define CL_LANG_ALL   ((1U << " n_langs ") - 1)"
 476
 477 print ""
 478 print "enum opt_code"
 479 print "{"
 480
 481 for (i = 0; i < n_opts; i++)
 482         back_chain[i] = "N_OPTS";
 483
 484 enum_value = 0
 485 for (i = 0; i < n_opts; i++) {
 486         # Combine the flags of identical switches.  Switches
 487         # appear many times if they are handled by many front
 488         # ends, for example.
 489         while( i + 1 != n_opts && opts[i] == opts[i + 1] ) {
 490                 flags[i + 1] = flags[i] " " flags[i + 1];
 491                 i++;
 492         }
 493
 494         len = length (opts[i]);
 495         enum = opt_enum(opts[i])
 496         enum_string = enum " = " enum_value ","
 497
 498         # Aliases do not get enumeration names.
 499         if ((flag_set_p("Alias.*", flags[i]) \
 500              && !flag_set_p("SeparateAlias", flags[i])) \
 501             || flag_set_p("Ignore", flags[i])) {
 502                 enum_string = "/* " enum_string " */"
 503         }
 504
 505         # If this switch takes joined arguments, back-chain all
 506         # subsequent switches to it for which it is a prefix.  If
 507         # a later switch S is a longer prefix of a switch T, T
 508         # will be back-chained to S in a later iteration of this
 509         # for() loop, which is what we want.
 510         if (flag_set_p("Joined.*", flags[i])) {
 511                 for (j = i + 1; j < n_opts; j++) {
 512                         if (substr (opts[j], 1, len) != opts[i])
 513                                 break;
 514                         back_chain[j] = enum;
 515                 }
 516         }
 517
 518         s = substr("                                          ",
 519                    length (enum_string))
 520
 521         if (help[i] == "")
 522                 hlp = "0"
 523         else
 524                 hlp = "N_(\"" help[i] "\")";
 525
 526         print "  " enum_string s "/* -" opts[i] " */"
 527         enum_value++
 528 }
 529
 530 print "  N_OPTS,"
 531 print "  OPT_SPECIAL_unknown,"
 532 print "  OPT_SPECIAL_ignore,"
 533 print "  OPT_SPECIAL_warn_removed,"
 534 print "  OPT_SPECIAL_program_name,"
 535 print "  OPT_SPECIAL_input_file"
 536 print "};"
 537 print ""
 538 print "#ifdef GCC_C_COMMON_C"
 539 print "/* Mapping from cpp message reasons to the options that enable them.  */"
 540 print "#include <cpplib.h>"
 541 print "struct cpp_reason_option_codes_t"
 542 print "{"
 543 print "  /* cpplib message reason.  */"
 544 print "  const enum cpp_warning_reason reason;"
 545 print "  /* gcc option that controls this message.  */"
 546 print "  const int option_code;"
 547 print "};"
 548 print ""
 549 print "static const struct cpp_reason_option_codes_t cpp_reason_option_codes[] = {"
 550 for (i = 0; i < n_opts; i++) {
 551     # With identical flags, pick only the last one.  The
 552     # earlier loop ensured that it has all flags merged,
 553     # and a nonempty help text if one of the texts was nonempty.
 554     while( i + 1 != n_opts && opts[i] == opts[i + 1] ) {
 555         i++;
 556     }
 557     cpp_reason = nth_arg(0, opt_args("CppReason", flags[i]));
 558     if (cpp_reason != "") {
 559         cpp_reason = cpp_reason ",";
 560         printf("  {%-40s %s},\n", cpp_reason, opt_enum(opts[i]))
 561     }
 562 }
 563 printf("  {%-40s 0},\n", "CPP_W_NONE,")
 564 print "};"
 565 print "#endif"
 566 print ""
 567 print "#endif /* OPTIONS_H */"
 568 }