1# Copyright (C) 2003-2017 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 file. 22# 23 24# This program uses functions from opt-functions.awk and code from 25# opt-read.awk. 26# 27# Usage: awk -f opt-functions.awk -f opt-read.awk -f optc-gen.awk \ 28# [-v header_name=header.h] < inputfile > options.c 29 30# Dump that array of options into a C file. 31END { 32 33 34# Combine the flags of identical switches. Switches 35# appear many times if they are handled by many front 36# ends, for example. 37for (i = 0; i < n_opts; i++) { 38 merged_flags[i] = flags[i] 39} 40for (i = 0; i < n_opts; i++) { 41 while(i + 1 != n_opts && opts[i] == opts[i + 1] ) { 42 merged_flags[i + 1] = merged_flags[i] " " merged_flags[i + 1]; 43 i++; 44 } 45} 46 47# Record EnabledBy and LangEnabledBy uses. 48n_enabledby = 0; 49for (i = 0; i < n_langs; i++) { 50 n_enabledby_lang[i] = 0; 51} 52for (i = 0; i < n_opts; i++) { 53 enabledby_arg = opt_args("EnabledBy", flags[i]); 54 if (enabledby_arg != "") { 55 logical_and = index(enabledby_arg, " && "); 56 if (logical_and != 0) { 57 # EnabledBy(arg1 && arg2) 58 split_sep = " && "; 59 } else { 60 # EnabledBy(arg) or EnabledBy(arg1 || arg2 || arg3) 61 split_sep = " \\|\\| "; 62 } 63 n_enabledby_names = split(enabledby_arg, enabledby_names, split_sep); 64 if (logical_and != 0 && n_enabledby_names > 2) { 65 print "#error " opts[i] " EnabledBy(Wfoo && Wbar && Wbaz) currently not supported" 66 } 67 for (j = 1; j <= n_enabledby_names; j++) { 68 enabledby_name = enabledby_names[j]; 69 enabledby_index = opt_numbers[enabledby_name]; 70 if (enabledby_index == "") { 71 print "#error " opts[i] " Enabledby(" enabledby_name "), unknown option '" enabledby_name "'" 72 } else if (!flag_set_p("Common", merged_flags[enabledby_index])) { 73 print "#error " opts[i] " Enabledby(" enabledby_name "), '" \ 74 enabledby_name "' must have flag 'Common'" \ 75 " to use Enabledby(), otherwise use LangEnabledBy()" 76 } else { 77 condition = ""; 78 if (logical_and != 0) { 79 opt_var_name_1 = search_var_name(enabledby_names[1], opt_numbers, opts, flags, n_opts); 80 opt_var_name_2 = search_var_name(enabledby_names[2], opt_numbers, opts, flags, n_opts); 81 if (opt_var_name_1 == "") { 82 print "#error " enabledby_names[1] " does not have a Var() flag" 83 } 84 if (opt_var_name_2 == "") { 85 print "#error " enabledby_names[2] " does not have a Var() flag" 86 } 87 condition = "opts->x_" opt_var_name_1 " && opts->x_" opt_var_name_2; 88 } 89 if (enables[enabledby_name] == "") { 90 enabledby[n_enabledby] = enabledby_name; 91 n_enabledby++; 92 } 93 enables[enabledby_name] = enables[enabledby_name] opts[i] ";"; 94 enablesif[enabledby_name] = enablesif[enabledby_name] condition ";"; 95 } 96 } 97 } 98 99 enabledby_arg = opt_args("LangEnabledBy", flags[i]); 100 if (enabledby_arg != "") { 101 enabledby_langs = nth_arg(0, enabledby_arg); 102 enabledby_name = nth_arg(1, enabledby_arg); 103 enabledby_posarg = nth_arg(2, enabledby_arg); 104 enabledby_negarg = nth_arg(3, enabledby_arg); 105 lang_enabled_by(enabledby_langs, enabledby_name, enabledby_posarg, enabledby_negarg); 106 } 107} 108 109 110print "/* This file is auto-generated by optc-gen.awk. */" 111print "" 112n_headers = split(header_name, headers, " ") 113for (i = 1; i <= n_headers; i++) 114 print "#include " quote headers[i] quote 115print "#include " quote "opts.h" quote 116print "#include " quote "intl.h" quote 117print "#include " quote "insn-attr-common.h" quote 118print "" 119 120if (n_extra_c_includes > 0) { 121 for (i = 0; i < n_extra_c_includes; i++) { 122 print "#include " quote extra_c_includes[i] quote 123 } 124 print "" 125} 126 127for (i = 0; i < n_enums; i++) { 128 name = enum_names[i] 129 type = enum_type[name] 130 print "static const struct cl_enum_arg cl_enum_" name \ 131 "_data[] = " 132 print "{" 133 print enum_data[name] " { NULL, 0, 0 }" 134 print "};" 135 print "" 136 print "static void" 137 print "cl_enum_" name "_set (void *var, int value)" 138 print "{" 139 print " *((" type " *) var) = (" type ") value;" 140 print "}" 141 print "" 142 print "static int" 143 print "cl_enum_" name "_get (const void *var)" 144 print "{" 145 print " return (int) *((const " type " *) var);" 146 print "}" 147 print "" 148} 149 150print "const struct cl_enum cl_enums[] =" 151print "{" 152for (i = 0; i < n_enums; i++) { 153 name = enum_names[i] 154 ehelp = enum_help[name] 155 if (ehelp == "") 156 ehelp = "NULL" 157 else 158 ehelp = quote ehelp quote 159 unknown_error = enum_unknown_error[name] 160 if (unknown_error == "") 161 unknown_error = "NULL" 162 else 163 unknown_error = quote unknown_error quote 164 print " {" 165 print " " ehelp "," 166 print " " unknown_error "," 167 print " cl_enum_" name "_data," 168 print " sizeof (" enum_type[name] ")," 169 print " cl_enum_" name "_set," 170 print " cl_enum_" name "_get" 171 print " }," 172} 173print "};" 174print "const unsigned int cl_enums_count = " n_enums ";" 175print "" 176 177print "const struct gcc_options global_options_init =\n{" 178for (i = 0; i < n_extra_vars; i++) { 179 var = extra_vars[i] 180 init = extra_vars[i] 181 if (var ~ "=" ) { 182 sub(".*= *", "", init) 183 } else { 184 init = "0" 185 } 186 sub(" *=.*", "", var) 187 name = var 188 sub("^.*[ *]", "", name) 189 sub("\\[.*\\]$", "", name) 190 var_seen[name] = 1 191 print " " init ", /* " name " */" 192} 193for (i = 0; i < n_opts; i++) { 194 name = var_name(flags[i]); 195 if (name == "") 196 continue; 197 198 init = opt_args("Init", flags[i]) 199 if (init != "") { 200 if (name in var_init && var_init[name] != init) 201 print "#error multiple initializers for " name 202 var_init[name] = init 203 } 204} 205for (i = 0; i < n_opts; i++) { 206 name = var_name(flags[i]); 207 if (name == "") 208 continue; 209 210 if (name in var_seen) 211 continue; 212 213 if (name in var_init) 214 init = var_init[name] 215 else 216 init = "0" 217 218 print " " init ", /* " name " */" 219 220 var_seen[name] = 1; 221} 222for (i = 0; i < n_opts; i++) { 223 name = static_var(opts[i], flags[i]); 224 if (name != "") { 225 print " 0, /* " name " (private state) */" 226 print "#undef x_" name 227 } 228} 229for (i = 0; i < n_opts; i++) { 230 if (flag_set_p("SetByCombined", flags[i])) 231 print " false, /* frontend_set_" var_name(flags[i]) " */" 232} 233print "};" 234print "" 235print "struct gcc_options global_options;" 236print "struct gcc_options global_options_set;" 237print "" 238 239print "const char * const lang_names[] =\n{" 240for (i = 0; i < n_langs; i++) { 241 macros[i] = "CL_" lang_sanitized_name(langs[i]) 242 s = substr(" ", length (macros[i])) 243 print " " quote langs[i] quote "," 244 } 245 246print " 0\n};\n" 247print "const unsigned int cl_options_count = N_OPTS;\n" 248print "#if (1U << " n_langs ") > CL_MIN_OPTION_CLASS" 249print " #error the number of languages exceeds the implementation limit" 250print "#endif" 251print "const unsigned int cl_lang_count = " n_langs ";\n" 252 253print "const struct cl_option cl_options[] =\n{" 254 255j = 0 256for (i = 0; i < n_opts; i++) { 257 back_chain[i] = "N_OPTS"; 258 indices[opts[i]] = j; 259 # Combine the flags of identical switches. Switches 260 # appear many times if they are handled by many front 261 # ends, for example. 262 while( i + 1 != n_opts && opts[i] == opts[i + 1] ) { 263 flags[i + 1] = flags[i] " " flags[i + 1]; 264 if (help[i + 1] == "") 265 help[i + 1] = help[i] 266 else if (help[i] != "" && help[i + 1] != help[i]) 267 print "#error Multiple different help strings for " \ 268 opts[i] ":\n\t" help[i] "\n\t" help[i + 1] 269 270 i++; 271 back_chain[i] = "N_OPTS"; 272 indices[opts[i]] = j; 273 } 274 j++; 275} 276 277for (i = 0; i < n_opts; i++) { 278 # With identical flags, pick only the last one. The 279 # earlier loop ensured that it has all flags merged, 280 # and a nonempty help text if one of the texts was nonempty. 281 while( i + 1 != n_opts && opts[i] == opts[i + 1] ) { 282 i++; 283 } 284 285 len = length (opts[i]); 286 enum = opt_enum(opts[i]) 287 288 # If this switch takes joined arguments, back-chain all 289 # subsequent switches to it for which it is a prefix. If 290 # a later switch S is a longer prefix of a switch T, T 291 # will be back-chained to S in a later iteration of this 292 # for() loop, which is what we want. 293 if (flag_set_p("Joined.*", flags[i])) { 294 for (j = i + 1; j < n_opts; j++) { 295 if (substr (opts[j], 1, len) != opts[i]) 296 break; 297 back_chain[j] = enum; 298 } 299 } 300 301 s = substr(" ", length (opts[i])) 302 if (i + 1 == n_opts) 303 comma = "" 304 305 if (help[i] == "") 306 hlp = "0" 307 else 308 hlp = quote help[i] quote; 309 310 missing_arg_error = opt_args("MissingArgError", flags[i]) 311 if (missing_arg_error == "") 312 missing_arg_error = "0" 313 else 314 missing_arg_error = quote missing_arg_error quote 315 316 317 warn_message = opt_args("Warn", flags[i]) 318 if (warn_message == "") 319 warn_message = "0" 320 else 321 warn_message = quote warn_message quote 322 323 alias_arg = opt_args("Alias", flags[i]) 324 if (alias_arg == "") { 325 if (flag_set_p("Ignore", flags[i])) 326 alias_data = "NULL, NULL, OPT_SPECIAL_ignore" 327 else 328 alias_data = "NULL, NULL, N_OPTS" 329 if (flag_set_p("Enum.*", flags[i])) { 330 if (!flag_set_p("RejectNegative", flags[i]) \ 331 && opts[i] ~ "^[Wfm]") 332 print "#error Enum allowing negative form" 333 } 334 } else { 335 alias_opt = nth_arg(0, alias_arg) 336 alias_posarg = nth_arg(1, alias_arg) 337 alias_negarg = nth_arg(2, alias_arg) 338 339 if (var_ref(opts[i], flags[i]) != "-1") 340 print "#error Alias setting variable" 341 342 if (alias_posarg != "" && alias_negarg == "") { 343 if (!flag_set_p("RejectNegative", flags[i]) \ 344 && opts[i] ~ "^[Wfm]") 345 print "#error Alias with single argument " \ 346 "allowing negative form" 347 } 348 if (alias_posarg != "" \ 349 && flag_set_p("NegativeAlias", flags[i])) { 350 print "#error Alias with multiple arguments " \ 351 "used with NegativeAlias" 352 } 353 354 alias_opt = opt_enum(alias_opt) 355 if (alias_posarg == "") 356 alias_posarg = "NULL" 357 else 358 alias_posarg = quote alias_posarg quote 359 if (alias_negarg == "") 360 alias_negarg = "NULL" 361 else 362 alias_negarg = quote alias_negarg quote 363 alias_data = alias_posarg ", " alias_negarg ", " alias_opt 364 } 365 366 neg = opt_args("Negative", flags[i]); 367 if (neg != "") 368 idx = indices[neg] 369 else { 370 if (flag_set_p("RejectNegative", flags[i])) 371 idx = -1; 372 else { 373 if (opts[i] ~ "^[Wfm]") 374 idx = indices[opts[i]]; 375 else 376 idx = -1; 377 } 378 } 379 # Split the printf after %u to work around an ia64-hp-hpux11.23 380 # awk bug. 381 printf(" { %c-%s%c,\n %s,\n %s,\n %s,\n %s, %s, %u,", 382 quote, opts[i], quote, hlp, missing_arg_error, warn_message, 383 alias_data, back_chain[i], len) 384 printf(" %d,\n", idx) 385 condition = opt_args("Condition", flags[i]) 386 cl_flags = switch_flags(flags[i]) 387 cl_bit_fields = switch_bit_fields(flags[i]) 388 cl_zero_bit_fields = switch_bit_fields("") 389 if (condition != "") 390 printf("#if %s\n" \ 391 " %s,\n" \ 392 " 0, %s,\n" \ 393 "#else\n" \ 394 " 0,\n" \ 395 " 1 /* Disabled. */, %s,\n" \ 396 "#endif\n", 397 condition, cl_flags, cl_bit_fields, cl_zero_bit_fields) 398 else 399 printf(" %s,\n" \ 400 " 0, %s,\n", 401 cl_flags, cl_bit_fields) 402 printf(" %s, %s }%s\n", var_ref(opts[i], flags[i]), 403 var_set(flags[i]), comma) 404} 405 406print "};" 407 408print "\n\n" 409print "bool " 410print "common_handle_option_auto (struct gcc_options *opts, " 411print " struct gcc_options *opts_set, " 412print " const struct cl_decoded_option *decoded, " 413print " unsigned int lang_mask, int kind, " 414print " location_t loc, " 415print " const struct cl_option_handlers *handlers, " 416print " diagnostic_context *dc) " 417print "{ " 418print " size_t scode = decoded->opt_index; " 419print " int value = decoded->value; " 420print " enum opt_code code = (enum opt_code) scode; " 421print " " 422print " gcc_assert (decoded->canonical_option_num_elements <= 2); " 423print " " 424print " switch (code) " 425print " { " 426# Handle EnabledBy 427for (i = 0; i < n_enabledby; i++) { 428 enabledby_name = enabledby[i]; 429 print " case " opt_enum(enabledby_name) ":" 430 n_enables = split(enables[enabledby_name], thisenable, ";"); 431 n_enablesif = split(enablesif[enabledby_name], thisenableif, ";"); 432 if (n_enables != n_enablesif) { 433 print "#error n_enables != n_enablesif: Something went wrong!" 434 } 435 for (j = 1; j < n_enables; j++) { 436 opt_var_name = var_name(flags[opt_numbers[thisenable[j]]]); 437 if (opt_var_name != "") { 438 condition = "!opts_set->x_" opt_var_name 439 if (thisenableif[j] != "") { 440 value = "(" thisenableif[j] ")" 441 } else { 442 value = "value" 443 } 444 print " if (" condition ")" 445 print " handle_generated_option (opts, opts_set," 446 print " " opt_enum(thisenable[j]) ", NULL, " value "," 447 print " lang_mask, kind, loc, handlers, true, dc);" 448 } else { 449 print "#error " thisenable[j] " does not have a Var() flag" 450 } 451 } 452 print " break;\n" 453} 454print " default: " 455print " break; " 456print " } " 457print " return true; " 458print "} " 459 460# Handle LangEnabledBy 461for (i = 0; i < n_langs; i++) { 462 lang_name = lang_sanitized_name(langs[i]); 463 mark_unused = " ATTRIBUTE_UNUSED"; 464 465 print "\n\n" 466 print "bool " 467 print lang_name "_handle_option_auto (struct gcc_options *opts" mark_unused ", " 468 print " struct gcc_options *opts_set" mark_unused ", " 469 print " size_t scode" mark_unused ", const char *arg" mark_unused ", int value" mark_unused ", " 470 print " unsigned int lang_mask" mark_unused ", int kind" mark_unused ", " 471 print " location_t loc" mark_unused ", " 472 print " const struct cl_option_handlers *handlers" mark_unused ", " 473 print " diagnostic_context *dc" mark_unused ") " 474 print "{ " 475 print " enum opt_code code = (enum opt_code) scode; " 476 print " " 477 print " switch (code) " 478 print " { " 479 480 for (k = 0; k < n_enabledby_lang[i]; k++) { 481 enabledby_name = enabledby[lang_name,k]; 482 print " case " opt_enum(enabledby_name) ":" 483 n_thisenable = split(enables[lang_name,enabledby_name], thisenable, ";"); 484 for (j = 1; j < n_thisenable; j++) { 485 n_thisenable_args = split(thisenable[j], thisenable_args, ","); 486 if (n_thisenable_args == 1) { 487 thisenable_opt = thisenable[j]; 488 value = "value"; 489 } else { 490 thisenable_opt = thisenable_args[1]; 491 with_posarg = thisenable_args[2]; 492 with_negarg = thisenable_args[3]; 493 value = "value ? " with_posarg " : " with_negarg; 494 } 495 opt_var_name = var_name(flags[opt_numbers[thisenable_opt]]); 496 if (opt_var_name != "") { 497 print " if (!opts_set->x_" opt_var_name ")" 498 print " handle_generated_option (opts, opts_set," 499 print " " opt_enum(thisenable_opt) ", NULL, " value "," 500 print " lang_mask, kind, loc, handlers, true, dc);" 501 } else { 502 print "#error " thisenable_opt " does not have a Var() flag" 503 } 504 } 505 print " break;\n" 506 } 507 print " default: " 508 print " break; " 509 print " } " 510 print " return true; " 511 print "} " 512} 513 514#Handle CPP() 515print "\n" 516print "#include " quote "cpplib.h" quote; 517print "void" 518print "cpp_handle_option_auto (const struct gcc_options * opts, " 519print " size_t scode, struct cpp_options * cpp_opts)" 520print "{ " 521print " enum opt_code code = (enum opt_code) scode; " 522print " " 523print " switch (code) " 524print " { " 525for (i = 0; i < n_opts; i++) { 526 # With identical flags, pick only the last one. The 527 # earlier loop ensured that it has all flags merged, 528 # and a nonempty help text if one of the texts was nonempty. 529 while( i + 1 != n_opts && opts[i] == opts[i + 1] ) { 530 i++; 531 } 532 533 cpp_option = nth_arg(0, opt_args("CPP", flags[i])); 534 if (cpp_option != "") { 535 opt_var_name = var_name(flags[i]); 536 init = opt_args("Init", flags[i]) 537 if (opt_var_name != "" && init != "") { 538 print " case " opt_enum(opts[i]) ":" 539 print " cpp_opts->" cpp_option " = opts->x_" opt_var_name ";" 540 print " break;" 541 } else if (opt_var_name == "" && init == "") { 542 print "#error CPP() requires setting Init() and Var() for " opts[i] 543 } else if (opt_var_name != "") { 544 print "#error CPP() requires setting Init() for " opts[i] 545 } else { 546 print "#error CPP() requires setting Var() for " opts[i] 547 } 548 } 549} 550print " default: " 551print " break; " 552print " } " 553print "}\n" 554print "void" 555print "init_global_opts_from_cpp(struct gcc_options * opts, " 556print " const struct cpp_options * cpp_opts)" 557print "{ " 558for (i = 0; i < n_opts; i++) { 559 # With identical flags, pick only the last one. The 560 # earlier loop ensured that it has all flags merged, 561 # and a nonempty help text if one of the texts was nonempty. 562 while( i + 1 != n_opts && opts[i] == opts[i + 1] ) { 563 i++; 564 } 565 cpp_option = nth_arg(0, opt_args("CPP", flags[i])); 566 opt_var_name = var_name(flags[i]); 567 if (cpp_option != "" && opt_var_name != "") { 568 print " opts->x_" opt_var_name " = cpp_opts->" cpp_option ";" 569 } 570} 571print "} " 572 573} 574 575