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"
  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 #if defined(_DEBUG) || defined(FIRM_DEBUG)
 115 /**
 116  * Debug printf implementation.
 117  *
 118  * @param fmt  printf style format parameter
 119  */
 120 void dbg_printf(const char *fmt, ...)
 121 {
 122         va_list list;
 123
 124         if (firm_dump.debug_print) {
 125                 va_start(list, fmt);
 126                 vprintf(fmt, list);
 127                 va_end(list);
 128         }  /* if */
 129 }
 130 #endif /* defined(_DEBUG) || defined(FIRM_DEBUG) */
 131
 132 static void initialize_firm(void)
 133 {
 134         firm_early_init();
 135
 136         dump_consts_local(1);
 137         dump_keepalive_edges(1);
 138 }
 139
 140 static void get_output_name(char *buf, size_t buflen, const char *inputname,
 141                             const char *newext)
 142 {
 143         size_t last_dot = 0xffffffff;
 144         size_t i = 0;
 145
 146         if(inputname == NULL) {
 147                 snprintf(buf, buflen, "a%s", newext);
 148                 return;
 149         }
 150
 151         for(const char *c = inputname; *c != 0; ++c) {
 152                 if(*c == '.')
 153                         last_dot = i;
 154                 ++i;
 155         }
 156         if(last_dot == 0xffffffff)
 157                 last_dot = i;
 158
 159         if(last_dot >= buflen)
 160                 panic("filename too long");
 161         memcpy(buf, inputname, last_dot);
 162
 163         size_t extlen = strlen(newext) + 1;
 164         if(extlen + last_dot >= buflen)
 165                 panic("filename too long");
 166         memcpy(buf+last_dot, newext, extlen);
 167 }
 168
 169 static translation_unit_t *do_parsing(FILE *const in, const char *const input_name)
 170 {
 171         lexer_open_stream(in, input_name);
 172         translation_unit_t *unit = parse();
 173         return unit;
 174 }
 175
 176 static void lextest(FILE *in, const char *fname)
 177 {
 178         lexer_open_stream(in, fname);
 179
 180         do {
 181                 lexer_next_preprocessing_token();
 182                 print_token(stdout, &lexer_token);
 183                 puts("");
 184         } while(lexer_token.type != T_EOF);
 185 }
 186
 187 static FILE *preprocess(FILE *in, const char *fname)
 188 {
 189         char buf[4096];
 190         obstack_1grow(&cppflags_obst, '\0');
 191         const char *flags = obstack_finish(&cppflags_obst);
 192
 193         if(in != stdin) {
 194                 snprintf(buf, sizeof(buf), PREPROCESSOR " %s %s", flags, fname);
 195         } else {
 196                 /* read from stdin */
 197                 snprintf(buf, sizeof(buf), PREPROCESSOR " %s -", flags);
 198         }
 199
 200         if(verbose) {
 201                 puts(buf);
 202         }
 203         FILE *f = popen(buf, "r");
 204         if(f == NULL) {
 205                 fprintf(stderr, "invoking preprocessor failed\n");
 206                 exit(1);
 207         }
 208         return f;
 209 }
 210
 211 static void do_link(const char *out, const char *in)
 212 {
 213         char buf[4096];
 214         obstack_1grow(&ldflags_obst, '\0');
 215         const char *flags = obstack_finish(&ldflags_obst);
 216
 217         snprintf(buf, sizeof(buf), LINKER " %s -o %s %s", flags, out, in);
 218         if(verbose) {
 219                 puts(buf);
 220         }
 221         int err = system(buf);
 222         if(err != 0) {
 223                 fprintf(stderr, "linker reported an error\n");
 224                 exit(1);
 225         }
 226 }
 227
 228 static void assemble(const char *out, const char *in)
 229 {
 230         char buf[4096];
 231
 232         snprintf(buf, sizeof(buf), "%s %s -o %s", ASSEMBLER, in, out);
 233         if(verbose) {
 234                 puts(buf);
 235         }
 236
 237         int err = system(buf);
 238         if(err != 0) {
 239                 fprintf(stderr, "assembler reported an error\n");
 240                 exit(1);
 241         }
 242 }
 243
 244 static const char *try_dir(const char *dir)
 245 {
 246         if(dir == NULL)
 247                 return dir;
 248         if(access(dir, R_OK | W_OK | X_OK) == 0)
 249                 return dir;
 250         return NULL;
 251 }
 252
 253 static const char *get_tempdir(void)
 254 {
 255         static const char *tmpdir = NULL;
 256
 257         if(tmpdir != NULL)
 258                 return tmpdir;
 259
 260         if(tmpdir == NULL)
 261                 tmpdir = try_dir(getenv("TMPDIR"));
 262         if(tmpdir == NULL)
 263                 tmpdir = try_dir(getenv("TMP"));
 264         if(tmpdir == NULL)
 265                 tmpdir = try_dir(getenv("TEMP"));
 266
 267 #ifdef P_tmpdir
 268         if(tmpdir == NULL)
 269                 tmpdir = try_dir(P_tmpdir);
 270 #endif
 271
 272         if(tmpdir == NULL)
 273                 tmpdir = try_dir("/var/tmp");
 274         if(tmpdir == NULL)
 275                 tmpdir = try_dir("/usr/tmp");
 276         if(tmpdir == NULL)
 277                 tmpdir = try_dir("/tmp");
 278
 279         if(tmpdir == NULL)
 280                 tmpdir = ".";
 281
 282         return tmpdir;
 283 }
 284
 285 #ifndef HAVE_MKSTEMP
 286 /* cheap and nasty mkstemp replacement */
 287 static int mkstemp(char *templ)
 288 {
 289         mktemp(templ);
 290         return open(templ, O_RDWR|O_CREAT|O_EXCL|O_BINARY, 0600);
 291 }
 292 #endif
 293
 294 /**
 295  * an own version of tmpnam, which: writes in a buffer, appends a user specified
 296  * suffix, emits no warnings during linking (like glibc/gnu ld do for tmpnam)...
 297  */
 298 static FILE *make_temp_file(char *buffer, size_t buflen,
 299                             const char *prefix, const char *suffix)
 300 {
 301         const char *tempdir = get_tempdir();
 302
 303         /* oh well... mkstemp doesn't accept a suffix after XXXXXX... */
 304         (void) suffix;
 305         suffix = "";
 306
 307         snprintf(buffer, buflen, "%s/%sXXXXXX%s", tempdir, prefix, suffix);
 308
 309         int fd = mkstemp(buffer);
 310         if(fd == -1) {
 311                 fprintf(stderr, "couldn't create temporary file: %s\n",
 312                         strerror(errno));
 313                 exit(1);
 314         }
 315         FILE *out = fdopen(fd, "w");
 316         if(out == NULL) {
 317                 fprintf(stderr, "couldn't create temporary file FILE*\n");
 318                 exit(1);
 319         }
 320
 321         return out;
 322 }
 323
 324 /**
 325  * Do the necessary lowering for compound parameters.
 326  */
 327 void lower_compound_params(void)
 328 {
 329         lower_params_t params;
 330
 331         params.def_ptr_alignment    = 4;
 332         params.flags                = LF_COMPOUND_RETURN | LF_RETURN_HIDDEN;
 333         params.hidden_params        = ADD_HIDDEN_ALWAYS_IN_FRONT;
 334         params.find_pointer_type    = NULL;
 335         params.ret_compound_in_regs = NULL;
 336         lower_calls_with_compounds(&params);
 337 }
 338
 339 typedef enum compile_mode_t {
 340         BenchmarkParser,
 341         ParseOnly,
 342         Compile,
 343         CompileDump,
 344         CompileAssemble,
 345         CompileAssembleLink,
 346         LexTest,
 347         PrintAst,
 348         PrintFluffy
 349 } compile_mode_t;
 350
 351 static void usage(const char *argv0)
 352 {
 353         fprintf(stderr, "Usage %s input [-o output] [-c]\n", argv0);
 354 }
 355
 356 int main(int argc, char **argv)
 357 {
 358         initialize_firm();
 359
 360         const char     *input        = NULL;
 361         const char     *outname      = NULL;
 362         const char     *dumpfunction = NULL;
 363         compile_mode_t  mode         = CompileAssembleLink;
 364         int             opt_level    = 1;
 365         int             result       = EXIT_SUCCESS;
 366         char            cpu_arch[16] = "ia32";
 367
 368         obstack_init(&cppflags_obst);
 369         obstack_init(&ldflags_obst);
 370
 371 #define GET_ARG_AFTER(def, args)                                             \
 372         def = &arg[sizeof(args)-1];                                              \
 373         if(def[0] == '\0') {                                                     \
 374                 ++i;                                                                 \
 375                 if(i >= argc) {                                                      \
 376                         fprintf(stderr, "error: expected argument after '" args "'\n");  \
 377                         argument_errors = true;                                          \
 378                         break;                                                           \
 379                 }                                                                    \
 380                 def = argv[i];                                                       \
 381                 if(def[0] == '-' && def[1] != '\0') {                                \
 382                         fprintf(stderr, "error: expected argument after '" args "'\n");  \
 383                         argument_errors = true;                                          \
 384                         continue;                                                        \
 385                 }                                                                    \
 386         }
 387
 388 #define SINGLE_OPTION(ch) (option[0] == (ch) && option[1] == '\0')
 389
 390         /* early options parsing (find out optimisation level) */
 391         for(int i = 1; i < argc; ++i) {
 392                 const char *arg = argv[i];
 393                 if(arg[0] != '-')
 394                         continue;
 395
 396                 const char *option = &arg[1];
 397                 if(option[0] == 'O') {
 398                         sscanf(&option[1], "%d", &opt_level);
 399                 }
 400         }
 401
 402         /* apply optimisation level */
 403         switch(opt_level) {
 404         case 0:
 405                 firm_option("no-opt");
 406                 break;
 407         case 1:
 408                 firm_option("no-inline");
 409                 break;
 410         default:
 411         case 4:
 412                 firm_option("strict-aliasing");
 413                 /* fallthrough */
 414         case 3:
 415                 firm_option("cond-eval");
 416                 firm_option("if-conv");
 417                 /* fallthrough */
 418         case 2:
 419                 firm_option("inline");
 420                 firm_option("deconv");
 421                 firm_be_option("omitfp");
 422                 break;
 423         }
 424
 425         /* parse rest of options */
 426         bool help_displayed  = false;
 427         bool argument_errors = false;
 428         for(int i = 1; i < argc; ++i) {
 429                 const char *arg = argv[i];
 430                 if(arg[0] == '-') {
 431                         /* an option */
 432                         const char *option = &arg[1];
 433                         if(option[0] == 'o') {
 434                                 GET_ARG_AFTER(outname, "-o");
 435                         } else if(option[0] == 'g') {
 436                                 firm_be_option("stabs=yes");
 437                                 firm_be_option("omitfp=no");
 438                                 firm_be_option("ia32-nooptcc=yes");
 439                         } else if(SINGLE_OPTION('c')) {
 440                                 mode = CompileAssemble;
 441                         } else if(SINGLE_OPTION('S')) {
 442                                 mode = Compile;
 443                         } else if(option[0] == 'O') {
 444                                 continue;
 445                         } else if(option[0] == 'I') {
 446                                 const char *opt;
 447                                 GET_ARG_AFTER(opt, "-I");
 448                                 obstack_printf(&cppflags_obst, " -I%s", opt);
 449                         } else if(option[0] == 'D') {
 450                                 const char *opt;
 451                                 GET_ARG_AFTER(opt, "-D");
 452                                 obstack_printf(&cppflags_obst, " -D%s", opt);
 453                         } else if(option[0] == 'U') {
 454                                 const char *opt;
 455                                 GET_ARG_AFTER(opt, "-U");
 456                                 obstack_printf(&cppflags_obst, " -U%s", opt);
 457                         } else if(option[0] == 'l') {
 458                                 const char *opt;
 459                                 GET_ARG_AFTER(opt, "-l");
 460                                 obstack_printf(&ldflags_obst, " -l%s", opt);
 461                         } else if(option[0] == 'L') {
 462                                 const char *opt;
 463                                 GET_ARG_AFTER(opt, "-L");
 464                                 obstack_printf(&ldflags_obst, " -L%s", opt);
 465                         } else if(SINGLE_OPTION('v')) {
 466                                 verbose = 1;
 467                         } else if(SINGLE_OPTION('w')) {
 468                                 inhibit_all_warnings = true;
 469                         } else if(option[0] == 'f') {
 470                                 const char *opt;
 471                                 GET_ARG_AFTER(opt, "-f");
 472
 473                                 if(strcmp(opt, "syntax-only") == 0) {
 474                                         mode = ParseOnly;
 475                                 } else if(strcmp(opt, "omit-frame-pointer") == 0) {
 476                                         firm_be_option("omitfp");
 477                                 } else if(strcmp(opt, "no-omit-frame-pointer") == 0) {
 478                                         firm_be_option("omitfp=no");
 479                                 } else {
 480                                         int res = firm_option(opt);
 481                                         if (res == 0) {
 482                                                 fprintf(stderr, "error: unknown Firm option '-f %s'\n",
 483                                                         opt);
 484                                                 argument_errors = true;
 485                                                 continue;
 486                                         } else if (res == -1) {
 487                                                 help_displayed = true;
 488                                         }
 489                                 }
 490                         } else if(option[0] == 'b') {
 491                                 const char *opt;
 492                                 GET_ARG_AFTER(opt, "-b");
 493                                 int res = firm_be_option(opt);
 494                                 if (res == 0) {
 495                                         fprintf(stderr, "error: unknown Firm backend option '-b %s'\n",
 496                                                 opt);
 497                                         argument_errors = true;
 498                                 } else if (res == -1) {
 499                                         help_displayed = true;
 500                                 } else {
 501                                         if (strncmp(opt, "isa=", 4) == 0)
 502                                                 strncpy(cpu_arch, opt, sizeof(cpu_arch));
 503                                 }
 504                         } else if(option[0] == 'W') {
 505                                 set_warning_opt(&option[1]);
 506                         } else if(option[0] == 'm') {
 507                                 const char *opt;
 508                                 char arch_opt[64];
 509
 510                                 GET_ARG_AFTER(opt, "-m");
 511                                 if(strncmp(opt, "arch=", 5) == 0) {
 512                                         GET_ARG_AFTER(opt, "-march=");
 513                                         snprintf(arch_opt, sizeof(arch_opt), "%s-arch=%s", cpu_arch, opt);
 514                                         int res = firm_be_option(arch_opt);
 515                                         if (res == 0)
 516                                                 argument_errors = true;
 517                                         else {
 518                                                 snprintf(arch_opt, sizeof(arch_opt), "%s-opt=%s", cpu_arch, opt);
 519                                                 int res = firm_be_option(arch_opt);
 520                                                 if (res == 0)
 521                                                         argument_errors = true;
 522                                         }
 523                                 } else if(strncmp(opt, "tune=", 5) == 0) {
 524                                         GET_ARG_AFTER(opt, "-mtune=");
 525                                         snprintf(arch_opt, sizeof(arch_opt), "%s-opt=%s", cpu_arch, opt);
 526                                         int res = firm_be_option(arch_opt);
 527                                         if (res == 0)
 528                                                 argument_errors = true;
 529                                 } else if(strncmp(opt, "cpu=", 4) == 0) {
 530                                         GET_ARG_AFTER(opt, "-mcpu=");
 531                                         snprintf(arch_opt, sizeof(arch_opt), "%s-arch=%s", cpu_arch, opt);
 532                                         int res = firm_be_option(arch_opt);
 533                                         if (res == 0)
 534                                                 argument_errors = true;
 535                                 } else if(strncmp(opt, "fpu=", 4) == 0) {
 536                                         GET_ARG_AFTER(opt, "-mfpu=");
 537                                         snprintf(arch_opt, sizeof(arch_opt), "%s-fpunit=%s", cpu_arch, opt);
 538                                         int res = firm_be_option(arch_opt);
 539                                         if (res == 0)
 540                                                 argument_errors = true;
 541                                 } else {
 542                                         char *endptr;
 543                                         long int value = strtol(opt, &endptr, 10);
 544                                         if (*endptr != '\0') {
 545                                                 fprintf(stderr, "error: wrong option '-m %s'\n",  opt);
 546                                                 argument_errors = true;
 547                                         }
 548                                         if (value != 16 && value != 32 && value != 64) {
 549                                                 fprintf(stderr, "error: option -m supports only 16, 32 or 64\n");
 550                                                 argument_errors = true;
 551                                         } else {
 552                                                 machine_size = (unsigned int)value;
 553                                         }
 554                                 }
 555                         } else if (option[0] == '\0') {
 556                                 if(input != NULL) {
 557                                         fprintf(stderr, "error: multiple input files specified\n");
 558                                         argument_errors = true;
 559                                 } else {
 560                                         input = arg;
 561                                 }
 562                         } else if(strcmp(option, "pg") == 0) {
 563                                 firm_be_option("-b gprof");
 564                                 obstack_printf(&ldflags_obst, " -pg");
 565                         } else if(strcmp(option, "pedantic") == 0) {
 566                                 fprintf(stderr, "warning: ignoring gcc option '%s'\n", arg);
 567                         } else if(strncmp(option, "std=", 4) == 0) {
 568                                 if(strcmp(&option[4], "c99") == 0) {
 569                                         c_mode = _C89|_C99;
 570                                 } else if(strcmp(&option[4], "c89") == 0) {
 571                                         c_mode = _C89;
 572                                 } else if(strcmp(&option[4], "gnu99") == 0) {
 573                                         c_mode = _C89|_C99|_GNUC;
 574                                 } else if(strcmp(&option[4], "microsoft") == 0) {
 575                                         c_mode = _C89|_C99|_MS;
 576                                 } else
 577                                         fprintf(stderr, "warning: ignoring gcc option '%s'\n", arg);
 578                         } else if (option[0] == '-') {
 579                                 /* double dash option */
 580                                 ++option;
 581                                 if(strcmp(option, "gcc") == 0) {
 582                                         c_mode |= _GNUC;
 583                                 } else if(strcmp(option, "no-gcc") == 0) {
 584                                         c_mode &= ~_GNUC;
 585                                 } else if(strcmp(option, "ms") == 0) {
 586                                         c_mode |= _MS;
 587                                 } else if(strcmp(option, "no-ms") == 0) {
 588                                         c_mode &= ~_MS;
 589                                 } else if(strcmp(option, "signed-chars") == 0) {
 590                                         char_is_signed = true;
 591                                 } else if(strcmp(option, "unsigned-chars") == 0) {
 592                                         char_is_signed = false;
 593                                 } else if(strcmp(option, "strict") == 0) {
 594                                         strict_mode = true;
 595                                 } else if(strcmp(option, "lextest") == 0) {
 596                                         mode = LexTest;
 597                                 } else if(strcmp(option, "benchmark") == 0) {
 598                                         mode = BenchmarkParser;
 599                                 } else if(strcmp(option, "print-ast") == 0) {
 600                                         mode = PrintAst;
 601                                 } else if(strcmp(option, "print-implicit-cast") == 0) {
 602                                         print_implicit_casts = true;
 603                                 } else if(strcmp(option, "print-parenthesis") == 0) {
 604                                         print_parenthesis = true;
 605                                 } else if(strcmp(option, "print-fluffy") == 0) {
 606                                         mode = PrintFluffy;
 607                                 } else if(strcmp(option, "version") == 0) {
 608                                         firm_version_t ver;
 609                                         firm_get_version(&ver);
 610                                         printf("cparser (%s) using libFirm (%u.%u",
 611                                                cparser_REVISION, ver.major, ver.minor);
 612                                         if(ver.revision[0] != 0) {
 613                                                 putchar(' ');
 614                                                 fputs(ver.revision, stdout);
 615                                         }
 616                                         if(ver.build[0] != 0) {
 617                                                 putchar(' ');
 618                                                 fputs(ver.build, stdout);
 619                                         }
 620                                         puts(")\n");
 621                                         exit(EXIT_SUCCESS);
 622                                 } else if(strcmp(option, "dump-function") == 0) {
 623                                         ++i;
 624                                         if(i >= argc) {
 625                                                 fprintf(stderr, "error: "
 626                                                         "expected argument after '--dump-function'\n");
 627                                                 argument_errors = true;
 628                                                 break;
 629                                         }
 630                                         dumpfunction = argv[i];
 631                                         mode         = CompileDump;
 632                                 } else {
 633                                         fprintf(stderr, "error: unknown argument '%s'\n", arg);
 634                                         argument_errors = true;
 635                                 }
 636                         } else {
 637                                 fprintf(stderr, "error: unknown argument '%s'\n", arg);
 638                                 argument_errors = true;
 639                         }
 640                 } else {
 641                         if(input != NULL) {
 642                                 fprintf(stderr, "error: multiple input files specified\n");
 643                                 argument_errors = true;
 644                         } else {
 645                                 input = arg;
 646                         }
 647                 }
 648         }
 649
 650         /* we do the lowering in ast2firm */
 651         firm_opt.lower_bitfields = FALSE;
 652
 653         if(help_displayed) {
 654                 return !argument_errors;
 655         }
 656         if(argument_errors) {
 657                 usage(argv[0]);
 658                 return 1;
 659         }
 660
 661         gen_firm_init();
 662         init_symbol_table();
 663         init_tokens();
 664         init_types();
 665         init_typehash();
 666         init_basic_types();
 667         init_lexer();
 668         init_ast();
 669         init_parser();
 670         init_ast2firm();
 671
 672         FILE *out = NULL;
 673         char  outnamebuf[4096];
 674         if(outname == NULL) {
 675                 switch(mode) {
 676                 case BenchmarkParser:
 677                 case PrintAst:
 678                 case PrintFluffy:
 679                 case LexTest:
 680                         if(outname == NULL)
 681                                 outname = "-";
 682                         break;
 683                 case ParseOnly:
 684                         break;
 685                 case Compile:
 686                         get_output_name(outnamebuf, sizeof(outnamebuf), input, ".s");
 687                         outname = outnamebuf;
 688                         break;
 689                 case CompileAssemble:
 690                         get_output_name(outnamebuf, sizeof(outnamebuf), input, ".o");
 691                         outname = outnamebuf;
 692                         break;
 693                 case CompileDump:
 694                         get_output_name(outnamebuf, sizeof(outnamebuf), dumpfunction,
 695                                         ".vcg");
 696                         outname = outnamebuf;
 697                         break;
 698                 case CompileAssembleLink:
 699 #ifdef _WIN32
 700                         /* Windows compiler typically derive the output name from
 701                            the first source file */
 702                         get_output_name(outnamebuf, sizeof(outnamebuf), input, ".exe");
 703                         outname = outnamebuf;
 704 #else
 705                         outname = "a.out";
 706 #endif
 707                         break;
 708                 }
 709         }
 710
 711         if(outname != NULL) {
 712                 if(strcmp(outname, "-") == 0) {
 713                         out = stdout;
 714                 } else {
 715                         out = fopen(outname, "w");
 716                         if(out == NULL) {
 717                                 fprintf(stderr, "Couldn't open '%s' for writing: %s\n", outname,
 718                                         strerror(errno));
 719                                 return 1;
 720                         }
 721                 }
 722         }
 723
 724         FILE *in;
 725         if(input == NULL) {
 726                 fprintf(stderr, "%s: no input files\n", argv[0]);
 727                 return 1;
 728         } else if(strcmp(input, "-") == 0) {
 729                 in    = stdin;
 730                 input = "<stdin>";
 731         } else {
 732                 in = fopen(input, "r");
 733                 if(in == NULL) {
 734                         fprintf(stderr, "Couldn't open '%s': %s\n", input, strerror(errno));
 735                         return 1;
 736                 }
 737         }
 738
 739         if(mode == LexTest) {
 740                 lextest(in, input);
 741                 fclose(in);
 742                 return 0;
 743         }
 744
 745         FILE *preprocessed_in = preprocess(in, input);
 746         translation_unit_t *const unit = do_parsing(preprocessed_in, input);
 747         int res = pclose(preprocessed_in);
 748         if(res != 0) {
 749                 return res;
 750         }
 751
 752         if(error_count > 0) {
 753                 /* parsing failed because of errors */
 754                 fprintf(stderr, "%u error(s), %u warning(s)\n", error_count, warning_count);
 755                 result = EXIT_FAILURE;
 756         } else if(warning_count > 0) {
 757                 fprintf(stderr, "%u warning(s)\n", warning_count);
 758         }
 759
 760         if(mode == BenchmarkParser) {
 761                 return result;
 762         }
 763
 764         /* prints the AST even if errors occurred */
 765         if(mode == PrintAst) {
 766                 type_set_output(out);
 767                 ast_set_output(out);
 768                 print_ast(unit);
 769                 return result;
 770         }
 771
 772         /* cannot handle other modes with errors */
 773         if(result != EXIT_SUCCESS)
 774                 return result;
 775
 776         if(mode == PrintFluffy) {
 777                 type_set_output(out);
 778                 ast_set_output(out);
 779                 write_fluffy_decls(out, unit);
 780         }
 781
 782         translation_unit_to_firm(unit);
 783
 784         if(mode == ParseOnly) {
 785                 return 0;
 786         }
 787
 788         FILE *asm_out;
 789         char  asm_tempfile[1024];
 790         if(mode == CompileDump) {
 791                 asm_out = NULL;
 792                 firm_be_opt.selection = BE_NONE;
 793         } else if(mode == Compile) {
 794                 asm_out = out;
 795         } else {
 796                 asm_out
 797                         = make_temp_file(asm_tempfile, sizeof(asm_tempfile), "cc", ".s");
 798         }
 799         gen_firm_finish(asm_out, input, /*c_mode=*/1, /*firm_const_exists=*/0);
 800
 801         if(mode == CompileDump) {
 802                 /* find irg */
 803                 ident    *id     = new_id_from_str(dumpfunction);
 804                 ir_graph *irg    = NULL;
 805                 int       n_irgs = get_irp_n_irgs();
 806                 for(int i = 0; i < n_irgs; ++i) {
 807                         ir_graph *tirg   = get_irp_irg(i);
 808                         ident    *irg_id = get_entity_ident(get_irg_entity(tirg));
 809                         if(irg_id == id) {
 810                                 irg = tirg;
 811                                 break;
 812                         }
 813                 }
 814
 815                 if(irg == NULL) {
 816                         fprintf(stderr, "No graph for function '%s' found\n", dumpfunction);
 817                         return 1;
 818                 }
 819
 820                 dump_ir_block_graph_file(irg, out);
 821                 fclose(out);
 822                 return 0;
 823         }
 824
 825         fclose(asm_out);
 826
 827         /* assemble assembler and create object file */
 828         char obj_tfile[1024];
 829         if(mode == CompileAssemble || mode == CompileAssembleLink) {
 830                 const char *obj_outfile;
 831                 if(mode == CompileAssemble) {
 832                         fclose(out);
 833                         obj_outfile = outname;
 834                 } else {
 835                         FILE *tempf
 836                                 = make_temp_file(obj_tfile, sizeof(obj_tfile), "cc", ".o");
 837                         fclose(tempf);
 838                         obj_outfile = obj_tfile;
 839                 }
 840
 841                 assemble(obj_outfile, asm_tempfile);
 842         }
 843
 844         /* link object file */
 845         if(mode == CompileAssembleLink) {
 846                 do_link(outname, obj_tfile);
 847         }
 848
 849         obstack_free(&cppflags_obst, NULL);
 850         obstack_free(&ldflags_obst, NULL);
 851
 852         exit_ast2firm();
 853         exit_parser();
 854         exit_ast();
 855         exit_lexer();
 856         exit_typehash();
 857         exit_types();
 858         exit_tokens();
 859         exit_symbol_table();
 860         return 0;
 861 }