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 var_opt_char[0] = "unsigned char x_optimize";
 141 var_opt_char[1] = "unsigned char x_optimize_size";
 142 var_opt_char[2] = "unsigned char x_optimize_debug";
 143 var_opt_char[3] = "unsigned char x_optimize_fast";
 144
 145 for (i = 0; i < n_opts; i++) {
 146         if (flag_set_p("(Optimization|PerFunction)", flags[i])) {
 147                 name = var_name(flags[i])
 148                 if(name == "")
 149                         continue;
 150
 151                 if(name in var_opt_seen)
 152                         continue;
 153
 154                 var_opt_seen[name]++;
 155                 otype = var_type_struct(flags[i]);
 156                 if (otype ~ "^((un)?signed +)?int *$")
 157                         var_opt_int[n_opt_int++] = otype "x_" name;
 158
 159                 else if (otype ~ "^((un)?signed +)?short *$")
 160                         var_opt_short[n_opt_short++] = otype "x_" name;
 161
 162                 else if (otype ~ "^((un)?signed +)?char *$")
 163                         var_opt_char[n_opt_char++] = otype "x_" name;
 164
 165                 else if (otype ~ ("^enum +[_" alnum "]+ *$"))
 166                         var_opt_enum[n_opt_enum++] = otype "x_" name;
 167
 168                 else
 169                         var_opt_other[n_opt_other++] = otype "x_" name;
 170         }
 171 }
 172
 173 for (i = 0; i < n_opt_other; i++) {
 174         print "  " var_opt_other[i] ";";
 175 }
 176
 177 for (i = 0; i < n_opt_int; i++) {
 178         print "  " var_opt_int[i] ";";
 179 }
 180
 181 for (i = 0; i < n_opt_enum; i++) {
 182         print "  " var_opt_enum[i] ";";
 183 }
 184
 185 for (i = 0; i < n_opt_short; i++) {
 186         print "  " var_opt_short[i] ";";
 187 }
 188
 189 for (i = 0; i < n_opt_char; i++) {
 190         print "  " var_opt_char[i] ";";
 191 }
 192
 193 print "};";
 194 print "";
 195
 196 # Target and optimization save/restore/print functions.
 197 print "/* Structure to save/restore selected target specific options.  */";
 198 print "struct GTY(()) cl_target_option";
 199 print "{";
 200
 201 n_target_char = 0;
 202 n_target_short = 0;
 203 n_target_int = 0;
 204 n_target_enum = 0;
 205 n_target_other = 0;
 206
 207 for (i = 0; i < n_target_save; i++) {
 208         if (target_save_decl[i] ~ "^((un)?signed +)?int +[_" alnum "]+$")
 209                 var_target_int[n_target_int++] = target_save_decl[i];
 210
 211         else if (target_save_decl[i] ~ "^((un)?signed +)?short +[_" alnum "]+$")
 212                 var_target_short[n_target_short++] = target_save_decl[i];
 213
 214         else if (target_save_decl[i] ~ "^((un)?signed +)?char +[_ " alnum "]+$")
 215                 var_target_char[n_target_char++] = target_save_decl[i];
 216
 217         else if (target_save_decl[i] ~ ("^enum +[_" alnum "]+ +[_" alnum "]+$")) {
 218                 var_target_enum[n_target_enum++] = target_save_decl[i];
 219         }
 220         else
 221                 var_target_other[n_target_other++] = target_save_decl[i];
 222 }
 223
 224 if (have_save) {
 225         for (i = 0; i < n_opts; i++) {
 226                 if (flag_set_p("Save", flags[i])) {
 227                         name = var_name(flags[i])
 228                         if(name == "")
 229                                 name = "target_flags";
 230
 231                         if(name in var_save_seen)
 232                                 continue;
 233
 234                         var_save_seen[name]++;
 235                         otype = var_type_struct(flags[i])
 236                         if (otype ~ "^((un)?signed +)?int *$")
 237                                 var_target_int[n_target_int++] = otype "x_" name;
 238
 239                         else if (otype ~ "^((un)?signed +)?short *$")
 240                                 var_target_short[n_target_short++] = otype "x_" name;
 241
 242                         else if (otype ~ "^((un)?signed +)?char *$")
 243                                 var_target_char[n_target_char++] = otype "x_" name;
 244
 245                         else if (otype ~ ("^enum +[_" alnum "]+ +[_" alnum "]+"))
 246                                 var_target_enum[n_target_enum++] = otype "x_" name;
 247
 248                         else
 249                                 var_target_other[n_target_other++] = otype "x_" name;
 250                 }
 251         }
 252 } else {
 253         var_target_int[n_target_int++] = "int x_target_flags";
 254 }
 255
 256 for (i = 0; i < n_target_other; i++) {
 257         print "  " var_target_other[i] ";";
 258 }
 259
 260 for (i = 0; i < n_target_enum; i++) {
 261         print "  " var_target_enum[i] ";";
 262 }
 263
 264 for (i = 0; i < n_target_int; i++) {
 265         print "  " var_target_int[i] ";";
 266 }
 267
 268 for (i = 0; i < n_target_short; i++) {
 269         print "  " var_target_short[i] ";";
 270 }
 271
 272 for (i = 0; i < n_target_char; i++) {
 273         print "  " var_target_char[i] ";";
 274 }
 275
 276 print "};";
 277 print "";
 278 print "";
 279 print "/* Save optimization variables into a structure.  */"
 280 print "extern void cl_optimization_save (struct cl_optimization *, struct gcc_options *);";
 281 print "";
 282 print "/* Restore optimization variables from a structure.  */";
 283 print "extern void cl_optimization_restore (struct gcc_options *, struct cl_optimization *);";
 284 print "";
 285 print "/* Print optimization variables from a structure.  */";
 286 print "extern void cl_optimization_print (FILE *, int, struct cl_optimization *);";
 287 print "";
 288 print "/* Print different optimization variables from structures provided as arguments.  */";
 289 print "extern void cl_optimization_print_diff (FILE *, int, cl_optimization *ptr1, cl_optimization *ptr2);";
 290 print "";
 291 print "/* Save selected option variables into a structure.  */"
 292 print "extern void cl_target_option_save (struct cl_target_option *, struct gcc_options *);";
 293 print "";
 294 print "/* Restore selected option variables from a structure.  */"
 295 print "extern void cl_target_option_restore (struct gcc_options *, struct cl_target_option *);";
 296 print "";
 297 print "/* Print target option variables from a structure.  */";
 298 print "extern void cl_target_option_print (FILE *, int, struct cl_target_option *);";
 299 print "";
 300 print "/* Print different target option variables from structures provided as arguments.  */";
 301 print "extern void cl_target_option_print_diff (FILE *, int, cl_target_option *ptr1, cl_target_option *ptr2);";
 302 print "";
 303 print "/* Compare two target option variables from a structure.  */";
 304 print "extern bool cl_target_option_eq (const struct cl_target_option *, const struct cl_target_option *);";
 305 print "";
 306 print "/* Free heap memory used by target option variables.  */";
 307 print "extern void cl_target_option_free (struct cl_target_option *);";
 308 print "";
 309 print "/* Hash option variables from a structure.  */";
 310 print "extern hashval_t cl_target_option_hash (const struct cl_target_option *);";
 311 print "";
 312 print "/* Hash optimization from a structure.  */";
 313 print "extern hashval_t cl_optimization_hash (const struct cl_optimization *);";
 314 print "";
 315 print "/* Compare two optimization options.  */";
 316 print "extern bool cl_optimization_option_eq (cl_optimization const *ptr1, cl_optimization const *ptr2);"
 317 print "";
 318 print "/* Free heap memory used by optimization options.  */";
 319 print "extern void cl_optimization_option_free (cl_optimization *ptr1);"
 320 print "";
 321 print "/* Generator files may not have access to location_t, and don't need these.  */"
 322 print "#if defined(UNKNOWN_LOCATION)"
 323 print "bool                                                                  "
 324 print "common_handle_option_auto (struct gcc_options *opts,                  "
 325 print "                           struct gcc_options *opts_set,              "
 326 print "                           const struct cl_decoded_option *decoded,   "
 327 print "                           unsigned int lang_mask, int kind,          "
 328 print "                           location_t loc,                            "
 329 print "                           const struct cl_option_handlers *handlers, "
 330 print "                           diagnostic_context *dc);                   "
 331 for (i = 0; i < n_langs; i++) {
 332     lang_name = lang_sanitized_name(langs[i]);
 333     print "bool"
 334     print lang_name "_handle_option_auto (struct gcc_options *opts,"
 335     print "                           struct gcc_options *opts_set,"
 336     print "                           size_t scode, const char *arg,"
 337     print "                           HOST_WIDE_INT value,"
 338     print "                           unsigned int lang_mask, int kind,"
 339     print "                           location_t loc,"
 340     print "                           const struct cl_option_handlers *handlers,"
 341     print "                           diagnostic_context *dc);"
 342 }
 343 print "void cpp_handle_option_auto (const struct gcc_options * opts, size_t scode,"
 344 print "                             struct cpp_options * cpp_opts);"
 345 print "void init_global_opts_from_cpp(struct gcc_options * opts,      "
 346 print "                               const struct cpp_options * cpp_opts);"
 347 print "#endif";
 348 print "#endif";
 349 print "";
 350
 351 for (i = 0; i < n_opts; i++) {
 352         name = opt_args("Mask", flags[i])
 353         if (name == "") {
 354                 opt = opt_args("InverseMask", flags[i])
 355                 if (opt ~ ",")
 356                         name = nth_arg(0, opt)
 357                 else
 358                         name = opt
 359         }
 360         if (name != "" && mask_bits[name] == 0) {
 361                 mask_bits[name] = 1
 362                 vname = var_name(flags[i])
 363                 mask = "MASK_"
 364                 mask_1 = "1U"
 365                 if (vname != "") {
 366                         mask = "OPTION_MASK_"
 367                         if (host_wide_int[vname] == "yes")
 368                                 mask_1 = "HOST_WIDE_INT_1U"
 369                 } else
 370                         extra_mask_bits[name] = 1
 371                 print "#define " mask name " (" mask_1 " << " masknum[vname]++ ")"
 372         }
 373 }
 374 for (i = 0; i < n_extra_masks; i++) {
 375         if (extra_mask_bits[extra_masks[i]] == 0)
 376                 print "#define MASK_" extra_masks[i] " (1U << " masknum[""]++ ")"
 377 }
 378
 379 for (var in masknum) {
 380         if (var != "" && host_wide_int[var] == "yes") {
 381                 print "#if defined(HOST_BITS_PER_WIDE_INT) && " masknum[var] " > HOST_BITS_PER_WIDE_INT"
 382                 print "#error too many masks for " var
 383                 print "#endif"
 384         }
 385         else if (masknum[var] > 32) {
 386                 if (var == "")
 387                         print "#error too many target masks"
 388                 else
 389                         print "#error too many masks for " var
 390         }
 391 }
 392 print ""
 393
 394 for (i = 0; i < n_opts; i++) {
 395         name = opt_args("Mask", flags[i])
 396         if (name == "") {
 397                 opt = opt_args("InverseMask", flags[i])
 398                 if (opt ~ ",")
 399                         name = nth_arg(0, opt)
 400                 else
 401                         name = opt
 402         }
 403         if (name != "" && mask_macros[name] == 0) {
 404                 mask_macros[name] = 1
 405                 vname = var_name(flags[i])
 406                 mask = "OPTION_MASK_"
 407                 if (vname == "") {
 408                         vname = "target_flags"
 409                         mask = "MASK_"
 410                         extra_mask_macros[name] = 1
 411                 }
 412                 print "#define TARGET_" name \
 413                       " ((" vname " & " mask name ") != 0)"
 414                 print "#define TARGET_" name "_P(" vname ")" \
 415                       " (((" vname ") & " mask name ") != 0)"
 416         }
 417 }
 418 for (i = 0; i < n_extra_masks; i++) {
 419         if (extra_mask_macros[extra_masks[i]] == 0)
 420                 print "#define TARGET_" extra_masks[i] \
 421                       " ((target_flags & MASK_" extra_masks[i] ") != 0)"
 422 }
 423 print ""
 424
 425 for (i = 0; i < n_opts; i++) {
 426         opt = opt_args("InverseMask", flags[i])
 427         if (opt ~ ",") {
 428                 vname = var_name(flags[i])
 429                 mask = "OPTION_MASK_"
 430                 if (vname == "") {
 431                         vname = "target_flags"
 432                         mask = "MASK_"
 433                 }
 434                 print "#define TARGET_" nth_arg(1, opt) \
 435                       " ((" vname " & " mask nth_arg(0, opt) ") == 0)"
 436         }
 437 }
 438 print ""
 439
 440 for (i = 0; i < n_langs; i++) {
 441         macros[i] = "CL_" lang_sanitized_name(langs[i])
 442         s = substr("            ", length (macros[i]))
 443         print "#define " macros[i] s " (1U << " i ")"
 444     }
 445 print "#define CL_LANG_ALL   ((1U << " n_langs ") - 1)"
 446
 447 print ""
 448 print "enum opt_code"
 449 print "{"
 450
 451 for (i = 0; i < n_opts; i++)
 452         back_chain[i] = "N_OPTS";
 453
 454 enum_value = 0
 455 for (i = 0; i < n_opts; i++) {
 456         # Combine the flags of identical switches.  Switches
 457         # appear many times if they are handled by many front
 458         # ends, for example.
 459         while( i + 1 != n_opts && opts[i] == opts[i + 1] ) {
 460                 flags[i + 1] = flags[i] " " flags[i + 1];
 461                 i++;
 462         }
 463
 464         len = length (opts[i]);
 465         enum = opt_enum(opts[i])
 466         enum_string = enum " = " enum_value ","
 467
 468         # Aliases do not get enumeration names.
 469         if ((flag_set_p("Alias.*", flags[i]) \
 470              && !flag_set_p("SeparateAlias", flags[i])) \
 471             || flag_set_p("Ignore", flags[i])) {
 472                 enum_string = "/* " enum_string " */"
 473         }
 474
 475         # If this switch takes joined arguments, back-chain all
 476         # subsequent switches to it for which it is a prefix.  If
 477         # a later switch S is a longer prefix of a switch T, T
 478         # will be back-chained to S in a later iteration of this
 479         # for() loop, which is what we want.
 480         if (flag_set_p("Joined.*", flags[i])) {
 481                 for (j = i + 1; j < n_opts; j++) {
 482                         if (substr (opts[j], 1, len) != opts[i])
 483                                 break;
 484                         back_chain[j] = enum;
 485                 }
 486         }
 487
 488         s = substr("                                          ",
 489                    length (enum_string))
 490
 491         if (help[i] == "")
 492                 hlp = "0"
 493         else
 494                 hlp = "N_(\"" help[i] "\")";
 495
 496         print "  " enum_string s "/* -" opts[i] " */"
 497         enum_value++
 498 }
 499
 500 print "  N_OPTS,"
 501 print "  OPT_SPECIAL_unknown,"
 502 print "  OPT_SPECIAL_ignore,"
 503 print "  OPT_SPECIAL_warn_removed,"
 504 print "  OPT_SPECIAL_program_name,"
 505 print "  OPT_SPECIAL_input_file"
 506 print "};"
 507 print ""
 508 print "#ifdef GCC_C_COMMON_C"
 509 print "/* Mapping from cpp message reasons to the options that enable them.  */"
 510 print "#include <cpplib.h>"
 511 print "struct cpp_reason_option_codes_t"
 512 print "{"
 513 print "  /* cpplib message reason.  */"
 514 print "  const enum cpp_warning_reason reason;"
 515 print "  /* gcc option that controls this message.  */"
 516 print "  const int option_code;"
 517 print "};"
 518 print ""
 519 print "static const struct cpp_reason_option_codes_t cpp_reason_option_codes[] = {"
 520 for (i = 0; i < n_opts; i++) {
 521     # With identical flags, pick only the last one.  The
 522     # earlier loop ensured that it has all flags merged,
 523     # and a nonempty help text if one of the texts was nonempty.
 524     while( i + 1 != n_opts && opts[i] == opts[i + 1] ) {
 525         i++;
 526     }
 527     cpp_reason = nth_arg(0, opt_args("CppReason", flags[i]));
 528     if (cpp_reason != "") {
 529         cpp_reason = cpp_reason ",";
 530         printf("  {%-40s %s},\n", cpp_reason, opt_enum(opts[i]))
 531     }
 532 }
 533 printf("  {%-40s 0},\n", "CPP_W_NONE,")
 534 print "};"
 535 print "#endif"
 536 print ""
 537 print "#endif /* OPTIONS_H */"
 538 }