gcc/opth-gen.awk

   1 #  Copyright (C) 2003-2018 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 = 3;
 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
 144 for (i = 0; i < n_opts; i++) {
 145         if (flag_set_p("(Optimization|PerFunction)", flags[i])) {
 146                 name = var_name(flags[i])
 147                 if(name == "")
 148                         continue;
 149
 150                 if(name in var_opt_seen)
 151                         continue;
 152
 153                 var_opt_seen[name]++;
 154                 otype = var_type_struct(flags[i]);
 155                 if (otype ~ "^((un)?signed +)?int *$")
 156                         var_opt_int[n_opt_int++] = otype "x_" name;
 157
 158                 else if (otype ~ "^((un)?signed +)?short *$")
 159                         var_opt_short[n_opt_short++] = otype "x_" name;
 160
 161                 else if (otype ~ "^((un)?signed +)?char *$")
 162                         var_opt_char[n_opt_char++] = otype "x_" name;
 163
 164                 else if (otype ~ ("^enum +[_" alnum "]+ *$"))
 165                         var_opt_enum[n_opt_enum++] = otype "x_" name;
 166
 167                 else
 168                         var_opt_other[n_opt_other++] = otype "x_" name;
 169         }
 170 }
 171
 172 for (i = 0; i < n_opt_other; i++) {
 173         print "  " var_opt_other[i] ";";
 174 }
 175
 176 for (i = 0; i < n_opt_int; i++) {
 177         print "  " var_opt_int[i] ";";
 178 }
 179
 180 for (i = 0; i < n_opt_enum; i++) {
 181         print "  " var_opt_enum[i] ";";
 182 }
 183
 184 for (i = 0; i < n_opt_short; i++) {
 185         print "  " var_opt_short[i] ";";
 186 }
 187
 188 for (i = 0; i < n_opt_char; i++) {
 189         print "  " var_opt_char[i] ";";
 190 }
 191
 192 print "};";
 193 print "";
 194
 195 # Target and optimization save/restore/print functions.
 196 print "/* Structure to save/restore selected target specific options.  */";
 197 print "struct GTY(()) cl_target_option";
 198 print "{";
 199
 200 n_target_char = 0;
 201 n_target_short = 0;
 202 n_target_int = 0;
 203 n_target_enum = 0;
 204 n_target_other = 0;
 205
 206 for (i = 0; i < n_target_save; i++) {
 207         if (target_save_decl[i] ~ "^((un)?signed +)?int +[_" alnum "]+$")
 208                 var_target_int[n_target_int++] = target_save_decl[i];
 209
 210         else if (target_save_decl[i] ~ "^((un)?signed +)?short +[_" alnum "]+$")
 211                 var_target_short[n_target_short++] = target_save_decl[i];
 212
 213         else if (target_save_decl[i] ~ "^((un)?signed +)?char +[_ " alnum "]+$")
 214                 var_target_char[n_target_char++] = target_save_decl[i];
 215
 216         else if (target_save_decl[i] ~ ("^enum +[_" alnum "]+ +[_" alnum "]+$")) {
 217                 var_target_enum[n_target_enum++] = target_save_decl[i];
 218         }
 219         else
 220                 var_target_other[n_target_other++] = target_save_decl[i];
 221 }
 222
 223 if (have_save) {
 224         for (i = 0; i < n_opts; i++) {
 225                 if (flag_set_p("Save", flags[i])) {
 226                         name = var_name(flags[i])
 227                         if(name == "")
 228                                 name = "target_flags";
 229
 230                         if(name in var_save_seen)
 231                                 continue;
 232
 233                         var_save_seen[name]++;
 234                         otype = var_type_struct(flags[i])
 235                         if (otype ~ "^((un)?signed +)?int *$")
 236                                 var_target_int[n_target_int++] = otype "x_" name;
 237
 238                         else if (otype ~ "^((un)?signed +)?short *$")
 239                                 var_target_short[n_target_short++] = otype "x_" name;
 240
 241                         else if (otype ~ "^((un)?signed +)?char *$")
 242                                 var_target_char[n_target_char++] = otype "x_" name;
 243
 244                         else if (otype ~ ("^enum +[_" alnum "]+ +[_" alnum "]+"))
 245                                 var_target_enum[n_target_enum++] = 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_enum; i++) {
 260         print "  " var_target_enum[i] ";";
 261 }
 262
 263 for (i = 0; i < n_target_int; i++) {
 264         print "  " var_target_int[i] ";";
 265 }
 266
 267 for (i = 0; i < n_target_short; i++) {
 268         print "  " var_target_short[i] ";";
 269 }
 270
 271 for (i = 0; i < n_target_char; i++) {
 272         print "  " var_target_char[i] ";";
 273 }
 274
 275 print "};";
 276 print "";
 277 print "";
 278 print "/* Save optimization variables into a structure.  */"
 279 print "extern void cl_optimization_save (struct cl_optimization *, struct gcc_options *);";
 280 print "";
 281 print "/* Restore optimization variables from a structure.  */";
 282 print "extern void cl_optimization_restore (struct gcc_options *, struct cl_optimization *);";
 283 print "";
 284 print "/* Print optimization variables from a structure.  */";
 285 print "extern void cl_optimization_print (FILE *, int, struct cl_optimization *);";
 286 print "";
 287 print "/* Print different optimization variables from structures provided as arguments.  */";
 288 print "extern void cl_optimization_print_diff (FILE *, int, cl_optimization *ptr1, cl_optimization *ptr2);";
 289 print "";
 290 print "/* Save selected option variables into a structure.  */"
 291 print "extern void cl_target_option_save (struct cl_target_option *, struct gcc_options *);";
 292 print "";
 293 print "/* Restore selected option variables from a structure.  */"
 294 print "extern void cl_target_option_restore (struct gcc_options *, struct cl_target_option *);";
 295 print "";
 296 print "/* Print target option variables from a structure.  */";
 297 print "extern void cl_target_option_print (FILE *, int, struct cl_target_option *);";
 298 print "";
 299 print "/* Print different target option variables from structures provided as arguments.  */";
 300 print "extern void cl_target_option_print_diff (FILE *, int, cl_target_option *ptr1, cl_target_option *ptr2);";
 301 print "";
 302 print "/* Compare two target option variables from a structure.  */";
 303 print "extern bool cl_target_option_eq (const struct cl_target_option *, const struct cl_target_option *);";
 304 print "";
 305 print "/* Hash option variables from a structure.  */";
 306 print "extern hashval_t cl_target_option_hash (const struct cl_target_option *);";
 307 print "";
 308 print "/* Hash optimization from a structure.  */";
 309 print "extern hashval_t cl_optimization_hash (const struct cl_optimization *);";
 310 print "";
 311 print "/* Generator files may not have access to location_t, and don't need these.  */"
 312 print "#if defined(UNKNOWN_LOCATION)"
 313 print "bool                                                                  "
 314 print "common_handle_option_auto (struct gcc_options *opts,                  "
 315 print "                           struct gcc_options *opts_set,              "
 316 print "                           const struct cl_decoded_option *decoded,   "
 317 print "                           unsigned int lang_mask, int kind,          "
 318 print "                           location_t loc,                            "
 319 print "                           const struct cl_option_handlers *handlers, "
 320 print "                           diagnostic_context *dc);                   "
 321 for (i = 0; i < n_langs; i++) {
 322     lang_name = lang_sanitized_name(langs[i]);
 323     print "bool                                                                  "
 324     print lang_name "_handle_option_auto (struct gcc_options *opts,              "
 325     print "                           struct gcc_options *opts_set,              "
 326     print "                           size_t scode, const char *arg, int value,  "
 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 }
 332 print "void cpp_handle_option_auto (const struct gcc_options * opts, size_t scode,"
 333 print "                             struct cpp_options * cpp_opts);"
 334 print "void init_global_opts_from_cpp(struct gcc_options * opts,      "
 335 print "                               const struct cpp_options * cpp_opts);"
 336 print "#endif";
 337 print "#endif";
 338 print "";
 339
 340 for (i = 0; i < n_opts; i++) {
 341         name = opt_args("Mask", flags[i])
 342         if (name == "") {
 343                 opt = opt_args("InverseMask", flags[i])
 344                 if (opt ~ ",")
 345                         name = nth_arg(0, opt)
 346                 else
 347                         name = opt
 348         }
 349         if (name != "" && mask_bits[name] == 0) {
 350                 mask_bits[name] = 1
 351                 vname = var_name(flags[i])
 352                 mask = "MASK_"
 353                 mask_1 = "1U"
 354                 if (vname != "") {
 355                         mask = "OPTION_MASK_"
 356                         if (host_wide_int[vname] == "yes")
 357                                 mask_1 = "HOST_WIDE_INT_1U"
 358                 } else
 359                         extra_mask_bits[name] = 1
 360                 print "#define " mask name " (" mask_1 " << " masknum[vname]++ ")"
 361         }
 362 }
 363 for (i = 0; i < n_extra_masks; i++) {
 364         if (extra_mask_bits[extra_masks[i]] == 0)
 365                 print "#define MASK_" extra_masks[i] " (1U << " masknum[""]++ ")"
 366 }
 367
 368 for (var in masknum) {
 369         if (var != "" && host_wide_int[var] == "yes") {
 370                 print "#if defined(HOST_BITS_PER_WIDE_INT) && " masknum[var] " > HOST_BITS_PER_WIDE_INT"
 371                 print "#error too many masks for " var
 372                 print "#endif"
 373         }
 374         else if (masknum[var] > 32) {
 375                 if (var == "")
 376                         print "#error too many target masks"
 377                 else
 378                         print "#error too many masks for " var
 379         }
 380 }
 381 print ""
 382
 383 for (i = 0; i < n_opts; i++) {
 384         name = opt_args("Mask", flags[i])
 385         if (name == "") {
 386                 opt = opt_args("InverseMask", flags[i])
 387                 if (opt ~ ",")
 388                         name = nth_arg(0, opt)
 389                 else
 390                         name = opt
 391         }
 392         if (name != "" && mask_macros[name] == 0) {
 393                 mask_macros[name] = 1
 394                 vname = var_name(flags[i])
 395                 mask = "OPTION_MASK_"
 396                 if (vname == "") {
 397                         vname = "target_flags"
 398                         mask = "MASK_"
 399                         extra_mask_macros[name] = 1
 400                 }
 401                 print "#define TARGET_" name \
 402                       " ((" vname " & " mask name ") != 0)"
 403                 print "#define TARGET_" name "_P(" vname ")" \
 404                       " (((" vname ") & " mask name ") != 0)"
 405         }
 406 }
 407 for (i = 0; i < n_extra_masks; i++) {
 408         if (extra_mask_macros[extra_masks[i]] == 0)
 409                 print "#define TARGET_" extra_masks[i] \
 410                       " ((target_flags & MASK_" extra_masks[i] ") != 0)"
 411 }
 412 print ""
 413
 414 for (i = 0; i < n_opts; i++) {
 415         opt = opt_args("InverseMask", flags[i])
 416         if (opt ~ ",") {
 417                 vname = var_name(flags[i])
 418                 mask = "OPTION_MASK_"
 419                 if (vname == "") {
 420                         vname = "target_flags"
 421                         mask = "MASK_"
 422                 }
 423                 print "#define TARGET_" nth_arg(1, opt) \
 424                       " ((" vname " & " mask nth_arg(0, opt) ") == 0)"
 425         }
 426 }
 427 print ""
 428
 429 for (i = 0; i < n_langs; i++) {
 430         macros[i] = "CL_" lang_sanitized_name(langs[i])
 431         s = substr("            ", length (macros[i]))
 432         print "#define " macros[i] s " (1U << " i ")"
 433     }
 434 print "#define CL_LANG_ALL   ((1U << " n_langs ") - 1)"
 435
 436 print ""
 437 print "enum opt_code"
 438 print "{"
 439
 440 for (i = 0; i < n_opts; i++)
 441         back_chain[i] = "N_OPTS";
 442
 443 enum_value = 0
 444 for (i = 0; i < n_opts; i++) {
 445         # Combine the flags of identical switches.  Switches
 446         # appear many times if they are handled by many front
 447         # ends, for example.
 448         while( i + 1 != n_opts && opts[i] == opts[i + 1] ) {
 449                 flags[i + 1] = flags[i] " " flags[i + 1];
 450                 i++;
 451         }
 452
 453         len = length (opts[i]);
 454         enum = opt_enum(opts[i])
 455         enum_string = enum " = " enum_value ","
 456
 457         # Aliases do not get enumeration names.
 458         if ((flag_set_p("Alias.*", flags[i]) \
 459              && !flag_set_p("SeparateAlias", flags[i])) \
 460             || flag_set_p("Ignore", flags[i])) {
 461                 enum_string = "/* " enum_string " */"
 462         }
 463
 464         # If this switch takes joined arguments, back-chain all
 465         # subsequent switches to it for which it is a prefix.  If
 466         # a later switch S is a longer prefix of a switch T, T
 467         # will be back-chained to S in a later iteration of this
 468         # for() loop, which is what we want.
 469         if (flag_set_p("Joined.*", flags[i])) {
 470                 for (j = i + 1; j < n_opts; j++) {
 471                         if (substr (opts[j], 1, len) != opts[i])
 472                                 break;
 473                         back_chain[j] = enum;
 474                 }
 475         }
 476
 477         s = substr("                                          ",
 478                    length (enum_string))
 479
 480         if (help[i] == "")
 481                 hlp = "0"
 482         else
 483                 hlp = "N_(\"" help[i] "\")";
 484
 485         print "  " enum_string s "/* -" opts[i] " */"
 486         enum_value++
 487 }
 488
 489 print "  N_OPTS,"
 490 print "  OPT_SPECIAL_unknown,"
 491 print "  OPT_SPECIAL_ignore,"
 492 print "  OPT_SPECIAL_program_name,"
 493 print "  OPT_SPECIAL_input_file"
 494 print "};"
 495 print ""
 496 print "#ifdef GCC_C_COMMON_C"
 497 print "/* Mapping from cpp message reasons to the options that enable them.  */"
 498 print "#include <cpplib.h>"
 499 print "struct cpp_reason_option_codes_t"
 500 print "{"
 501 print "  const int reason;              /* cpplib message reason.  */"
 502 print "  const int option_code; /* gcc option that controls this message.  */"
 503 print "};"
 504 print ""
 505 print "static const struct cpp_reason_option_codes_t cpp_reason_option_codes[] = {"
 506 for (i = 0; i < n_opts; i++) {
 507     # With identical flags, pick only the last one.  The
 508     # earlier loop ensured that it has all flags merged,
 509     # and a nonempty help text if one of the texts was nonempty.
 510     while( i + 1 != n_opts && opts[i] == opts[i + 1] ) {
 511         i++;
 512     }
 513     cpp_reason = nth_arg(0, opt_args("CppReason", flags[i]));
 514     if (cpp_reason != "") {
 515         cpp_reason = cpp_reason ",";
 516         printf("  {%-40s %s},\n", cpp_reason, opt_enum(opts[i]))
 517     }
 518 }
 519 printf("  {%-40s 0},\n", "CPP_W_NONE,")
 520 print "};"
 521 print "#endif"
 522 print ""
 523 print "#endif /* OPTIONS_H */"
 524 }