nsz Git - cparser/blob - main.c

   1 /*
   2  * This file is part of cparser.
   3  * Copyright (C) 2007-2008 Matthias Braun <matze@braunis.de>
   4  *
   5  * This program is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU General Public License
   7  * as published by the Free Software Foundation; either version 2
   8  * of the License, or (at your option) any 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; if not, write to the Free Software
  17  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
  18  * 02111-1307, USA.
  19  */
  20 #include <config.h>
  21
  22 #define _GNU_SOURCE
  23
  24 #include <stdio.h>
  25 #include <stdlib.h>
  26 #include <stdbool.h>
  27 #include <errno.h>
  28 #include <string.h>
  29 #include <assert.h>
  30
  31 #ifdef _WIN32
  32
  33 #include <fcntl.h>
  34 #include <io.h>
  35
  36 /* no eXecute on Win32 */
  37 #define X_OK 0
  38 #define W_OK 2
  39 #define R_OK 4
  40
  41 #define O_RDWR          _O_RDWR
  42 #define O_CREAT         _O_CREAT
  43 #define O_EXCL          _O_EXCL
  44 #define O_BINARY        _O_BINARY
  45
  46 /* remap some names, we are not in the POSIX world */
  47 #define access(fname, mode)      _access(fname, mode)
  48 #define mktemp(tmpl)             _mktemp(tmpl)
  49 #define open(fname, oflag, mode) _open(fname, oflag, mode)
  50 #define fdopen(fd, mode)         _fdopen(fd, mode)
  51 #define popen(cmd, mode)         _popen(cmd, mode)
  52 #define pclose(file)             _pclose(file)
  53
  54 #else
  55 #include <unistd.h>
  56 #define HAVE_MKSTEMP
  57 #endif
  58
  59 #ifndef WITH_LIBCORE
  60 #define WITH_LIBCORE
  61 #endif
  62
  63 #include <libfirm/firm.h>
  64 #include <libfirm/be.h>
  65
  66 #include "lexer.h"
  67 #include "token_t.h"
  68 #include "types.h"
  69 #include "type_hash.h"
  70 #include "parser.h"
  71 #include "ast2firm.h"
  72 #include "diagnostic.h"
  73 #include "lang_features.h"
  74 #include "driver/firm_opt.h"
  75 #include "driver/firm_cmdline.h"
  76 #include "adt/error.h"
  77 #include "write_fluffy.h"
  78 #include "revision.h"
  79 #include "warning.h"
  80
  81 #ifndef PREPROCESSOR
  82 #define PREPROCESSOR "cpp -std=c99 -U__WCHAR_TYPE__ -D__WCHAR_TYPE__=int -m32"
  83 #endif
  84
  85 #ifndef LINKER
  86 #define LINKER    "gcc -m32"
  87 #endif
  88
  89 #ifndef ASSEMBLER
  90 #define ASSEMBLER "as --32"
  91 #endif
  92
  93 /** The current c mode/dialect. */
  94 unsigned int c_mode = _C89|_C99|_GNUC;
  95
  96 /** The 'machine size', 16, 32 or 64 bit, 32bit is the default. */
  97 unsigned int machine_size = 32;
  98
  99 /** true if the char type is signed. */
 100 bool char_is_signed = true;
 101
 102 /** true for strict language checking. */
 103 bool strict_mode = false;
 104
 105 /* to switch on printing of implicit casts */
 106 extern bool print_implicit_casts;
 107
 108 /* to switch on printing of parenthesis to indicate operator precedence */
 109 extern bool print_parenthesis;
 110
 111 static int            verbose;
 112 static struct obstack cppflags_obst, ldflags_obst;
 113
 114 typedef struct file_list_entry_t file_list_entry_t;
 115
 116 struct file_list_entry_t {
 117         const char        *filename;
 118         file_list_entry_t *next;
 119 };
 120
 121 #if defined(_DEBUG) || defined(FIRM_DEBUG)
 122 /**
 123  * Debug printf implementation.
 124  *
 125  * @param fmt  printf style format parameter
 126  */
 127 void dbg_printf(const char *fmt, ...)
 128 {
 129         va_list list;
 130
 131         if (firm_dump.debug_print) {
 132                 va_start(list, fmt);
 133                 vprintf(fmt, list);
 134                 va_end(list);
 135         }  /* if */
 136 }
 137 #endif /* defined(_DEBUG) || defined(FIRM_DEBUG) */
 138
 139 static void initialize_firm(void)
 140 {
 141         firm_early_init();
 142
 143         dump_consts_local(1);
 144         dump_keepalive_edges(1);
 145 }
 146
 147 static void get_output_name(char *buf, size_t buflen, const char *inputname,
 148                             const char *newext)
 149 {
 150         size_t last_dot = 0xffffffff;
 151         size_t i = 0;
 152
 153         if(inputname == NULL) {
 154                 snprintf(buf, buflen, "a%s", newext);
 155                 return;
 156         }
 157
 158         for(const char *c = inputname; *c != 0; ++c) {
 159                 if(*c == '.')
 160                         last_dot = i;
 161                 ++i;
 162         }
 163         if(last_dot == 0xffffffff)
 164                 last_dot = i;
 165
 166         if(last_dot >= buflen)
 167                 panic("filename too long");
 168         memcpy(buf, inputname, last_dot);
 169
 170         size_t extlen = strlen(newext) + 1;
 171         if(extlen + last_dot >= buflen)
 172                 panic("filename too long");
 173         memcpy(buf+last_dot, newext, extlen);
 174 }
 175
 176 static translation_unit_t *do_parsing(FILE *const in, const char *const input_name)
 177 {
 178         lexer_open_stream(in, input_name);
 179         translation_unit_t *unit = parse();
 180         return unit;
 181 }
 182
 183 static void lextest(FILE *in, const char *fname)
 184 {
 185         lexer_open_stream(in, fname);
 186
 187         do {
 188                 lexer_next_preprocessing_token();
 189                 print_token(stdout, &lexer_token);
 190                 puts("");
 191         } while(lexer_token.type != T_EOF);
 192 }
 193
 194 static FILE *preprocess(FILE *in, const char *fname, bool to_stdout)
 195 {
 196         char buf[4096];
 197         obstack_1grow(&cppflags_obst, '\0');
 198         const char *flags = obstack_finish(&cppflags_obst);
 199
 200         if(in != stdin) {
 201                 snprintf(buf, sizeof(buf), PREPROCESSOR " %s %s", flags, fname);
 202         } else {
 203                 /* read from stdin */
 204                 snprintf(buf, sizeof(buf), PREPROCESSOR " %s -", flags);
 205         }
 206
 207         if(verbose) {
 208                 puts(buf);
 209         }
 210         if(to_stdout) {
 211                 int res = system(buf);
 212                 exit(res);
 213         } else {
 214                 FILE *f = popen(buf, "r");
 215                 if(f == NULL) {
 216                         fprintf(stderr, "invoking preprocessor failed\n");
 217                         exit(1);
 218                 }
 219                 return f;
 220         }
 221 }
 222
 223 static void do_link(const char *out, const char *in)
 224 {
 225         char buf[4096];
 226         obstack_1grow(&ldflags_obst, '\0');
 227         const char *flags = obstack_finish(&ldflags_obst);
 228
 229         snprintf(buf, sizeof(buf), LINKER " %s -o %s %s", flags, out, in);
 230         if(verbose) {
 231                 puts(buf);
 232         }
 233         int err = system(buf);
 234         if(err != 0) {
 235                 fprintf(stderr, "linker reported an error\n");
 236                 exit(1);
 237         }
 238 }
 239
 240 static void assemble(const char *out, const char *in)
 241 {
 242         char buf[4096];
 243
 244         snprintf(buf, sizeof(buf), "%s %s -o %s", ASSEMBLER, in, out);
 245         if(verbose) {
 246                 puts(buf);
 247         }
 248
 249         int err = system(buf);
 250         if(err != 0) {
 251                 fprintf(stderr, "assembler reported an error\n");
 252                 exit(1);
 253         }
 254 }
 255
 256 static const char *try_dir(const char *dir)
 257 {
 258         if(dir == NULL)
 259                 return dir;
 260         if(access(dir, R_OK | W_OK | X_OK) == 0)
 261                 return dir;
 262         return NULL;
 263 }
 264
 265 static const char *get_tempdir(void)
 266 {
 267         static const char *tmpdir = NULL;
 268
 269         if(tmpdir != NULL)
 270                 return tmpdir;
 271
 272         if(tmpdir == NULL)
 273                 tmpdir = try_dir(getenv("TMPDIR"));
 274         if(tmpdir == NULL)
 275                 tmpdir = try_dir(getenv("TMP"));
 276         if(tmpdir == NULL)
 277                 tmpdir = try_dir(getenv("TEMP"));
 278
 279 #ifdef P_tmpdir
 280         if(tmpdir == NULL)
 281                 tmpdir = try_dir(P_tmpdir);
 282 #endif
 283
 284         if(tmpdir == NULL)
 285                 tmpdir = try_dir("/var/tmp");
 286         if(tmpdir == NULL)
 287                 tmpdir = try_dir("/usr/tmp");
 288         if(tmpdir == NULL)
 289                 tmpdir = try_dir("/tmp");
 290
 291         if(tmpdir == NULL)
 292                 tmpdir = ".";
 293
 294         return tmpdir;
 295 }
 296
 297 #ifndef HAVE_MKSTEMP
 298 /* cheap and nasty mkstemp replacement */
 299 static int mkstemp(char *templ)
 300 {
 301         mktemp(templ);
 302         return open(templ, O_RDWR|O_CREAT|O_EXCL|O_BINARY, 0600);
 303 }
 304 #endif
 305
 306 /**
 307  * an own version of tmpnam, which: writes in a buffer, appends a user specified
 308  * suffix, emits no warnings during linking (like glibc/gnu ld do for tmpnam)...
 309  */
 310 static FILE *make_temp_file(char *buffer, size_t buflen,
 311                             const char *prefix, const char *suffix)
 312 {
 313         const char *tempdir = get_tempdir();
 314
 315         /* oh well... mkstemp doesn't accept a suffix after XXXXXX... */
 316         (void) suffix;
 317         suffix = "";
 318
 319         snprintf(buffer, buflen, "%s/%sXXXXXX%s", tempdir, prefix, suffix);
 320
 321         int fd = mkstemp(buffer);
 322         if(fd == -1) {
 323                 fprintf(stderr, "couldn't create temporary file: %s\n",
 324                         strerror(errno));
 325                 exit(1);
 326         }
 327         FILE *out = fdopen(fd, "w");
 328         if(out == NULL) {
 329                 fprintf(stderr, "couldn't create temporary file FILE*\n");
 330                 exit(1);
 331         }
 332
 333         return out;
 334 }
 335
 336 /**
 337  * Do the necessary lowering for compound parameters.
 338  */
 339 void lower_compound_params(void)
 340 {
 341         lower_params_t params;
 342
 343         params.def_ptr_alignment    = 4;
 344         params.flags                = LF_COMPOUND_RETURN | LF_RETURN_HIDDEN;
 345         params.hidden_params        = ADD_HIDDEN_ALWAYS_IN_FRONT;
 346         params.find_pointer_type    = NULL;
 347         params.ret_compound_in_regs = NULL;
 348         lower_calls_with_compounds(&params);
 349 }
 350
 351 typedef enum compile_mode_t {
 352         BenchmarkParser,
 353         PreprocessOnly,
 354         ParseOnly,
 355         Compile,
 356         CompileDump,
 357         CompileAssemble,
 358         CompileAssembleLink,
 359         LexTest,
 360         PrintAst,
 361         PrintFluffy,
 362         Link
 363 } compile_mode_t;
 364
 365 static void usage(const char *argv0)
 366 {
 367         fprintf(stderr, "Usage %s input [-o output] [-c]\n", argv0);
 368 }
 369
 370 static void print_cparser_version(void) {
 371         firm_version_t ver;
 372         firm_get_version(&ver);
 373
 374         printf("cparser (%s) using libFirm (%u.%u",
 375                 cparser_REVISION, ver.major, ver.minor);
 376         if(ver.revision[0] != 0) {
 377                 putchar(' ');
 378                 fputs(ver.revision, stdout);
 379         }
 380         if(ver.build[0] != 0) {
 381                 putchar(' ');
 382                 fputs(ver.build, stdout);
 383         }
 384         puts(")\n");
 385 }
 386
 387 int main(int argc, char **argv)
 388 {
 389         initialize_firm();
 390
 391         const char        *input        = NULL;
 392         const char        *outname      = NULL;
 393         const char        *dumpfunction = NULL;
 394         compile_mode_t     mode         = CompileAssembleLink;
 395         int                opt_level    = 1;
 396         int                result       = EXIT_SUCCESS;
 397         char               cpu_arch[16] = "ia32";
 398         file_list_entry_t *c_files      = NULL;
 399         file_list_entry_t *s_files      = NULL;
 400         file_list_entry_t *o_files      = NULL;
 401         struct obstack     file_obst;
 402
 403         obstack_init(&cppflags_obst);
 404         obstack_init(&ldflags_obst);
 405         obstack_init(&file_obst);
 406
 407 #define GET_ARG_AFTER(def, args)                                             \
 408         def = &arg[sizeof(args)-1];                                              \
 409         if(def[0] == '\0') {                                                     \
 410                 ++i;                                                                 \
 411                 if(i >= argc) {                                                      \
 412                         fprintf(stderr, "error: expected argument after '" args "'\n");  \
 413                         argument_errors = true;                                          \
 414                         break;                                                           \
 415                 }                                                                    \
 416                 def = argv[i];                                                       \
 417                 if(def[0] == '-' && def[1] != '\0') {                                \
 418                         fprintf(stderr, "error: expected argument after '" args "'\n");  \
 419                         argument_errors = true;                                          \
 420                         continue;                                                        \
 421                 }                                                                    \
 422         }
 423
 424 #define SINGLE_OPTION(ch) (option[0] == (ch) && option[1] == '\0')
 425
 426         /* early options parsing (find out optimisation level) */
 427         for(int i = 1; i < argc; ++i) {
 428                 const char *arg = argv[i];
 429                 if(arg[0] != '-')
 430                         continue;
 431
 432                 const char *option = &arg[1];
 433                 if(option[0] == 'O') {
 434                         sscanf(&option[1], "%d", &opt_level);
 435                 }
 436         }
 437
 438         /* apply optimisation level */
 439         switch(opt_level) {
 440         case 0:
 441                 firm_option("no-opt");
 442                 break;
 443         case 1:
 444                 firm_option("no-inline");
 445                 break;
 446         default:
 447         case 4:
 448                 firm_option("strict-aliasing");
 449                 /* fallthrough */
 450         case 3:
 451                 firm_option("cond-eval");
 452                 firm_option("if-conv");
 453                 /* fallthrough */
 454         case 2:
 455                 firm_option("inline");
 456                 firm_option("deconv");
 457                 firm_be_option("omitfp");
 458                 break;
 459         }
 460
 461         /* parse rest of options */
 462         bool help_displayed  = false;
 463         bool argument_errors = false;
 464         for(int i = 1; i < argc; ++i) {
 465                 const char *arg = argv[i];
 466                 if(arg[0] == '-' && arg[1] != 0) {
 467                         /* an option */
 468                         const char *option = &arg[1];
 469                         if(option[0] == 'o') {
 470                                 GET_ARG_AFTER(outname, "-o");
 471                         } else if(option[0] == 'g') {
 472                                 firm_be_option("stabs=yes");
 473                                 firm_be_option("omitfp=no");
 474                                 firm_be_option("ia32-nooptcc=yes");
 475                         } else if(SINGLE_OPTION('c')) {
 476                                 mode = CompileAssemble;
 477                         } else if(SINGLE_OPTION('E')) {
 478                                 mode = PreprocessOnly;
 479                         } else if(SINGLE_OPTION('S')) {
 480                                 mode = Compile;
 481                         } else if(option[0] == 'O') {
 482                                 continue;
 483                         } else if(option[0] == 'I') {
 484                                 const char *opt;
 485                                 GET_ARG_AFTER(opt, "-I");
 486                                 obstack_printf(&cppflags_obst, " -I%s", opt);
 487                         } else if(option[0] == 'D') {
 488                                 const char *opt;
 489                                 GET_ARG_AFTER(opt, "-D");
 490                                 obstack_printf(&cppflags_obst, " -D%s", opt);
 491                         } else if(option[0] == 'U') {
 492                                 const char *opt;
 493                                 GET_ARG_AFTER(opt, "-U");
 494                                 obstack_printf(&cppflags_obst, " -U%s", opt);
 495                         } else if(option[0] == 'l') {
 496                                 const char *opt;
 497                                 GET_ARG_AFTER(opt, "-l");
 498                                 obstack_printf(&ldflags_obst, " -l%s", opt);
 499                         } else if(option[0] == 'L') {
 500                                 const char *opt;
 501                                 GET_ARG_AFTER(opt, "-L");
 502                                 obstack_printf(&ldflags_obst, " -L%s", opt);
 503                         } else if(SINGLE_OPTION('v')) {
 504                                 verbose = 1;
 505                         } else if(SINGLE_OPTION('w')) {
 506                                 inhibit_all_warnings = true;
 507                         } else if(option[0] == 'f') {
 508                                 const char *opt;
 509                                 GET_ARG_AFTER(opt, "-f");
 510
 511                                 if(strcmp(opt, "syntax-only") == 0) {
 512                                         mode = ParseOnly;
 513                                 } else if(strcmp(opt, "omit-frame-pointer") == 0) {
 514                                         firm_be_option("omitfp");
 515                                 } else if(strcmp(opt, "no-omit-frame-pointer") == 0) {
 516                                         firm_be_option("omitfp=no");
 517                                 } else {
 518                                         int res = firm_option(opt);
 519                                         if (res == 0) {
 520                                                 fprintf(stderr, "error: unknown Firm option '-f %s'\n",
 521                                                         opt);
 522                                                 argument_errors = true;
 523                                                 continue;
 524                                         } else if (res == -1) {
 525                                                 help_displayed = true;
 526                                         }
 527                                 }
 528                         } else if(option[0] == 'b') {
 529                                 const char *opt;
 530                                 GET_ARG_AFTER(opt, "-b");
 531                                 int res = firm_be_option(opt);
 532                                 if (res == 0) {
 533                                         fprintf(stderr, "error: unknown Firm backend option '-b %s'\n",
 534                                                 opt);
 535                                         argument_errors = true;
 536                                 } else if (res == -1) {
 537                                         help_displayed = true;
 538                                 } else {
 539                                         if (strncmp(opt, "isa=", 4) == 0)
 540                                                 strncpy(cpu_arch, opt, sizeof(cpu_arch));
 541                                 }
 542                         } else if(option[0] == 'W') {
 543                                 set_warning_opt(&option[1]);
 544                         } else if(option[0] == 'm') {
 545                                 /* -m options */
 546                                 const char *opt;
 547                                 char arch_opt[64];
 548
 549                                 GET_ARG_AFTER(opt, "-m");
 550                                 if(strncmp(opt, "arch=", 5) == 0) {
 551                                         GET_ARG_AFTER(opt, "-march=");
 552                                         snprintf(arch_opt, sizeof(arch_opt), "%s-arch=%s", cpu_arch, opt);
 553                                         int res = firm_be_option(arch_opt);
 554                                         if (res == 0)
 555                                                 argument_errors = true;
 556                                         else {
 557                                                 snprintf(arch_opt, sizeof(arch_opt), "%s-opt=%s", cpu_arch, opt);
 558                                                 int res = firm_be_option(arch_opt);
 559                                                 if (res == 0)
 560                                                         argument_errors = true;
 561                                         }
 562                                 } else if(strncmp(opt, "tune=", 5) == 0) {
 563                                         GET_ARG_AFTER(opt, "-mtune=");
 564                                         snprintf(arch_opt, sizeof(arch_opt), "%s-opt=%s", cpu_arch, opt);
 565                                         int res = firm_be_option(arch_opt);
 566                                         if (res == 0)
 567                                                 argument_errors = true;
 568                                 } else if(strncmp(opt, "cpu=", 4) == 0) {
 569                                         GET_ARG_AFTER(opt, "-mcpu=");
 570                                         snprintf(arch_opt, sizeof(arch_opt), "%s-arch=%s", cpu_arch, opt);
 571                                         int res = firm_be_option(arch_opt);
 572                                         if (res == 0)
 573                                                 argument_errors = true;
 574                                 } else if(strncmp(opt, "fpmath=", 7) == 0) {
 575                                         GET_ARG_AFTER(opt, "-mfpmath=");
 576                                         if(strcmp(opt, "387") == 0)
 577                                                 opt = "x87";
 578                                         else if(strcmp(opt, "sse") == 0)
 579                                                 opt = "sse2";
 580                                         else {
 581                                                 fprintf(stderr, "error: option -mfpumath supports only 387 or sse\n");
 582                                                 argument_errors = true;
 583                                         }
 584                                         if(!argument_errors) {
 585                                                 snprintf(arch_opt, sizeof(arch_opt), "%s-fpunit=%s", cpu_arch, opt);
 586                                                 int res = firm_be_option(arch_opt);
 587                                                 if (res == 0)
 588                                                         argument_errors = true;
 589                                         }
 590                                 } else if(strncmp(opt, "preferred-stack-boundary=", 25) == 0) {
 591                                         GET_ARG_AFTER(opt, "-mpreferred-stack-boundary=");
 592                                         snprintf(arch_opt, sizeof(arch_opt), "%s-stackalign=%s", cpu_arch, opt);
 593                                         int res = firm_be_option(arch_opt);
 594                                         if (res == 0)
 595                                                 argument_errors = true;
 596                                 } else if(strcmp(opt, "omit-leaf-frame-pointer") == 0) {
 597                                         int res = firm_be_option("omitleaffp=1");
 598                                         if (res == 0)
 599                                                 argument_errors = true;
 600                                 } else if(strcmp(opt, "no-omit-leaf-frame-pointer") == 0) {
 601                                         int res = firm_be_option("omitleaffp=0");
 602                                         if (res == 0)
 603                                                 argument_errors = true;
 604                                 } else {
 605                                         char *endptr;
 606                                         long int value = strtol(opt, &endptr, 10);
 607                                         if (*endptr != '\0') {
 608                                                 fprintf(stderr, "error: wrong option '-m %s'\n",  opt);
 609                                                 argument_errors = true;
 610                                         }
 611                                         if (value != 16 && value != 32 && value != 64) {
 612                                                 fprintf(stderr, "error: option -m supports only 16, 32 or 64\n");
 613                                                 argument_errors = true;
 614                                         } else {
 615                                                 machine_size = (unsigned int)value;
 616                                         }
 617                                 }
 618                         } else if (option[0] == '\0') {
 619                                 if(input != NULL) {
 620                                         fprintf(stderr, "error: multiple input files specified\n");
 621                                         argument_errors = true;
 622                                 } else {
 623                                         input = arg;
 624                                 }
 625                         } else if(strcmp(option, "pg") == 0) {
 626                                 firm_be_option("-b gprof");
 627                                 obstack_printf(&ldflags_obst, " -pg");
 628                         } else if(strcmp(option, "pedantic") == 0) {
 629                                 fprintf(stderr, "warning: ignoring gcc option '%s'\n", arg);
 630                         } else if(strncmp(option, "std=", 4) == 0) {
 631                                 if(strcmp(&option[4], "c99") == 0) {
 632                                         c_mode = _C89|_C99;
 633                                 } else if(strcmp(&option[4], "c89") == 0) {
 634                                         c_mode = _C89;
 635                                 } else if(strcmp(&option[4], "gnu99") == 0) {
 636                                         c_mode = _C89|_C99|_GNUC;
 637                                 } else if(strcmp(&option[4], "microsoft") == 0) {
 638                                         c_mode = _C89|_C99|_MS;
 639                                 } else
 640                                         fprintf(stderr, "warning: ignoring gcc option '%s'\n", arg);
 641                         } else if(strcmp(option, "version") == 0) {
 642                                 print_cparser_version();
 643                         } else if (option[0] == '-') {
 644                                 /* double dash option */
 645                                 ++option;
 646                                 if(strcmp(option, "gcc") == 0) {
 647                                         c_mode |= _GNUC;
 648                                 } else if(strcmp(option, "no-gcc") == 0) {
 649                                         c_mode &= ~_GNUC;
 650                                 } else if(strcmp(option, "ms") == 0) {
 651                                         c_mode |= _MS;
 652                                 } else if(strcmp(option, "no-ms") == 0) {
 653                                         c_mode &= ~_MS;
 654                                 } else if(strcmp(option, "signed-chars") == 0) {
 655                                         char_is_signed = true;
 656                                 } else if(strcmp(option, "unsigned-chars") == 0) {
 657                                         char_is_signed = false;
 658                                 } else if(strcmp(option, "strict") == 0) {
 659                                         strict_mode = true;
 660                                 } else if(strcmp(option, "lextest") == 0) {
 661                                         mode = LexTest;
 662                                 } else if(strcmp(option, "benchmark") == 0) {
 663                                         mode = BenchmarkParser;
 664                                 } else if(strcmp(option, "print-ast") == 0) {
 665                                         mode = PrintAst;
 666                                 } else if(strcmp(option, "print-implicit-cast") == 0) {
 667                                         print_implicit_casts = true;
 668                                 } else if(strcmp(option, "print-parenthesis") == 0) {
 669                                         print_parenthesis = true;
 670                                 } else if(strcmp(option, "print-fluffy") == 0) {
 671                                         mode = PrintFluffy;
 672                                 } else if(strcmp(option, "version") == 0) {
 673                                         print_cparser_version();
 674                                         exit(EXIT_SUCCESS);
 675                                 } else if(strcmp(option, "dump-function") == 0) {
 676                                         ++i;
 677                                         if(i >= argc) {
 678                                                 fprintf(stderr, "error: "
 679                                                         "expected argument after '--dump-function'\n");
 680                                                 argument_errors = true;
 681                                                 break;
 682                                         }
 683                                         dumpfunction = argv[i];
 684                                         mode         = CompileDump;
 685                                 } else {
 686                                         fprintf(stderr, "error: unknown argument '%s'\n", arg);
 687                                         argument_errors = true;
 688                                 }
 689                         } else {
 690                                 fprintf(stderr, "error: unknown argument '%s'\n", arg);
 691                                 argument_errors = true;
 692                         }
 693                 } else {
 694
 695                         file_list_entry_t *entry
 696                                 = obstack_alloc(&file_obst, sizeof(entry[0]));
 697                         entry->filename = arg;
 698
 699                         size_t len = strlen(arg);
 700                         if (len < 2) {
 701                                 if (arg[0] == '-') {
 702                                         /* exception: '-' as name reads C from stdin */
 703                                         entry->next = c_files;
 704                                         c_files     = entry;
 705                                         continue;
 706                                 }
 707                                 fprintf(stderr, "'%s': file format not recognized\n", input);
 708                                 continue;
 709                         }
 710
 711                         if (strcmp(arg+len-2, ".c") == 0) {
 712                                 entry->next = c_files;
 713                                 c_files     = entry;
 714                         } else if (strcmp(arg+len-2, ".s") == 0) {
 715                                 entry->next = s_files;
 716                                 s_files     = entry;
 717                         } else if (strcmp(arg+len-2, ".o") == 0) {
 718                                 entry->next = o_files;
 719                                 o_files     = entry;
 720                         } else {
 721                                 fprintf(stderr, "'%s': file format not recognized\n", input);
 722                         }
 723                 }
 724         }
 725
 726         if (c_files == NULL && s_files == NULL && o_files != NULL) {
 727                 mode = Link;
 728         } else if (c_files != NULL && c_files->next == NULL) {
 729                 input = c_files->filename;
 730         } else {
 731                 if (c_files == NULL) {
 732                         fprintf(stderr, "error: no input files specified\n");
 733                 } else {
 734                         fprintf(stderr, "error: multiple input files specified\n");
 735                 }
 736                 argument_errors = true;
 737         }
 738
 739         /* we do the lowering in ast2firm */
 740         firm_opt.lower_bitfields = FALSE;
 741
 742         if (help_displayed) {
 743                 return !argument_errors;
 744         }
 745         if (argument_errors) {
 746                 usage(argv[0]);
 747                 return 1;
 748         }
 749
 750         gen_firm_init();
 751         init_symbol_table();
 752         init_tokens();
 753         init_types();
 754         init_typehash();
 755         init_basic_types();
 756         init_lexer();
 757         init_ast();
 758         init_parser();
 759         init_ast2firm();
 760
 761         FILE *out = NULL;
 762         char  outnamebuf[4096];
 763         if(outname == NULL) {
 764                 switch(mode) {
 765                 case BenchmarkParser:
 766                 case PrintAst:
 767                 case PrintFluffy:
 768                 case LexTest:
 769                         if(outname == NULL)
 770                                 outname = "-";
 771                         break;
 772                 case PreprocessOnly:
 773                         break;
 774                 case ParseOnly:
 775                         break;
 776                 case Compile:
 777                         get_output_name(outnamebuf, sizeof(outnamebuf), input, ".s");
 778                         outname = outnamebuf;
 779                         break;
 780                 case CompileAssemble:
 781                         get_output_name(outnamebuf, sizeof(outnamebuf), input, ".o");
 782                         outname = outnamebuf;
 783                         break;
 784                 case CompileDump:
 785                         get_output_name(outnamebuf, sizeof(outnamebuf), dumpfunction,
 786                                         ".vcg");
 787                         outname = outnamebuf;
 788                         break;
 789                 case Link:
 790                 case CompileAssembleLink:
 791 #ifdef _WIN32
 792                         /* Windows compiler typically derive the output name from
 793                            the first source file */
 794                         get_output_name(outnamebuf, sizeof(outnamebuf), input, ".exe");
 795                         outname = outnamebuf;
 796 #else
 797                         outname = "a.out";
 798 #endif
 799                         break;
 800                 }
 801         }
 802
 803         if (mode == Link) {
 804                 obstack_1grow(&ldflags_obst, '\0');
 805                 const char *flags = obstack_finish(&ldflags_obst);
 806
 807                 obstack_printf(&file_obst, "%s", LINKER);
 808
 809                 for (file_list_entry_t *entry = o_files; entry != NULL;
 810                                 entry = entry->next) {
 811                         obstack_printf(&file_obst, " %s", entry->filename);
 812                 }
 813
 814                 obstack_printf(&file_obst, " -o %s %s", outname, flags);
 815
 816                 char *buf = obstack_finish(&file_obst);
 817
 818                 if(verbose) {
 819                         puts(buf);
 820                 }
 821                 int err = system(buf);
 822                 if(err != 0) {
 823                         fprintf(stderr, "linker reported an error\n");
 824                         exit(1);
 825                 }
 826                 return 0;
 827         }
 828
 829         if(outname != NULL) {
 830                 if(strcmp(outname, "-") == 0) {
 831                         out = stdout;
 832                 } else {
 833                         out = fopen(outname, "w");
 834                         if(out == NULL) {
 835                                 fprintf(stderr, "Couldn't open '%s' for writing: %s\n", outname,
 836                                         strerror(errno));
 837                                 return 1;
 838                         }
 839                 }
 840         }
 841
 842         FILE *in;
 843         if(input == NULL) {
 844                 fprintf(stderr, "%s: no input files\n", argv[0]);
 845                 return 1;
 846         } else if(strcmp(input, "-") == 0) {
 847                 in    = stdin;
 848                 input = "<stdin>";
 849         } else {
 850                 in = fopen(input, "r");
 851                 if(in == NULL) {
 852                         fprintf(stderr, "Couldn't open '%s': %s\n", input, strerror(errno));
 853                         return 1;
 854                 }
 855         }
 856
 857         if(mode == LexTest) {
 858                 lextest(in, input);
 859                 fclose(in);
 860                 return 0;
 861         }
 862
 863         FILE *preprocessed_in = preprocess(in, input, mode == PreprocessOnly);
 864         translation_unit_t *const unit = do_parsing(preprocessed_in, input);
 865         int res = pclose(preprocessed_in);
 866         if(res != 0) {
 867                 return res;
 868         }
 869
 870         if(error_count > 0) {
 871                 /* parsing failed because of errors */
 872                 fprintf(stderr, "%u error(s), %u warning(s)\n", error_count, warning_count);
 873                 result = EXIT_FAILURE;
 874         } else if(warning_count > 0) {
 875                 fprintf(stderr, "%u warning(s)\n", warning_count);
 876         }
 877
 878         if(mode == BenchmarkParser) {
 879                 return result;
 880         }
 881
 882         /* prints the AST even if errors occurred */
 883         if(mode == PrintAst) {
 884                 type_set_output(out);
 885                 ast_set_output(out);
 886                 print_ast(unit);
 887                 return result;
 888         }
 889
 890         /* cannot handle other modes with errors */
 891         if(result != EXIT_SUCCESS)
 892                 return result;
 893
 894         if(mode == PrintFluffy) {
 895                 type_set_output(out);
 896                 ast_set_output(out);
 897                 write_fluffy_decls(out, unit);
 898         }
 899
 900         translation_unit_to_firm(unit);
 901
 902         if(mode == ParseOnly) {
 903                 return 0;
 904         }
 905
 906         FILE *asm_out;
 907         char  asm_tempfile[1024];
 908         if(mode == CompileDump) {
 909                 asm_out = NULL;
 910                 firm_be_opt.selection = BE_NONE;
 911         } else if(mode == Compile) {
 912                 asm_out = out;
 913         } else {
 914                 asm_out
 915                         = make_temp_file(asm_tempfile, sizeof(asm_tempfile), "cc", ".s");
 916         }
 917         gen_firm_finish(asm_out, input, /*c_mode=*/1, /*firm_const_exists=*/0);
 918
 919         if(mode == CompileDump) {
 920                 /* find irg */
 921                 ident    *id     = new_id_from_str(dumpfunction);
 922                 ir_graph *irg    = NULL;
 923                 int       n_irgs = get_irp_n_irgs();
 924                 for(int i = 0; i < n_irgs; ++i) {
 925                         ir_graph *tirg   = get_irp_irg(i);
 926                         ident    *irg_id = get_entity_ident(get_irg_entity(tirg));
 927                         if(irg_id == id) {
 928                                 irg = tirg;
 929                                 break;
 930                         }
 931                 }
 932
 933                 if(irg == NULL) {
 934                         fprintf(stderr, "No graph for function '%s' found\n", dumpfunction);
 935                         return 1;
 936                 }
 937
 938                 dump_ir_block_graph_file(irg, out);
 939                 fclose(out);
 940                 return 0;
 941         }
 942
 943         fclose(asm_out);
 944
 945         /* assemble assembler and create object file */
 946         char obj_tfile[1024];
 947         if(mode == CompileAssemble || mode == CompileAssembleLink) {
 948                 const char *obj_outfile;
 949                 if(mode == CompileAssemble) {
 950                         fclose(out);
 951                         obj_outfile = outname;
 952                 } else {
 953                         FILE *tempf
 954                                 = make_temp_file(obj_tfile, sizeof(obj_tfile), "cc", ".o");
 955                         fclose(tempf);
 956                         obj_outfile = obj_tfile;
 957                 }
 958
 959                 assemble(obj_outfile, asm_tempfile);
 960         }
 961
 962         /* link object file */
 963         if(mode == CompileAssembleLink) {
 964                 do_link(outname, obj_tfile);
 965         }
 966
 967         obstack_free(&cppflags_obst, NULL);
 968         obstack_free(&ldflags_obst, NULL);
 969         obstack_free(&file_obst, NULL);
 970
 971         exit_ast2firm();
 972         exit_parser();
 973         exit_ast();
 974         exit_lexer();
 975         exit_typehash();
 976         exit_types();
 977         exit_tokens();
 978         exit_symbol_table();
 979         return 0;
 980 }