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, bool to_stdout)
 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         if(to_stdout) {
 204                 int res = system(buf);
 205                 exit(res);
 206         } else {
 207                 FILE *f = popen(buf, "r");
 208                 if(f == NULL) {
 209                         fprintf(stderr, "invoking preprocessor failed\n");
 210                         exit(1);
 211                 }
 212                 return f;
 213         }
 214 }
 215
 216 static void do_link(const char *out, const char *in)
 217 {
 218         char buf[4096];
 219         obstack_1grow(&ldflags_obst, '\0');
 220         const char *flags = obstack_finish(&ldflags_obst);
 221
 222         snprintf(buf, sizeof(buf), LINKER " %s -o %s %s", flags, out, in);
 223         if(verbose) {
 224                 puts(buf);
 225         }
 226         int err = system(buf);
 227         if(err != 0) {
 228                 fprintf(stderr, "linker reported an error\n");
 229                 exit(1);
 230         }
 231 }
 232
 233 static void assemble(const char *out, const char *in)
 234 {
 235         char buf[4096];
 236
 237         snprintf(buf, sizeof(buf), "%s %s -o %s", ASSEMBLER, in, out);
 238         if(verbose) {
 239                 puts(buf);
 240         }
 241
 242         int err = system(buf);
 243         if(err != 0) {
 244                 fprintf(stderr, "assembler reported an error\n");
 245                 exit(1);
 246         }
 247 }
 248
 249 static const char *try_dir(const char *dir)
 250 {
 251         if(dir == NULL)
 252                 return dir;
 253         if(access(dir, R_OK | W_OK | X_OK) == 0)
 254                 return dir;
 255         return NULL;
 256 }
 257
 258 static const char *get_tempdir(void)
 259 {
 260         static const char *tmpdir = NULL;
 261
 262         if(tmpdir != NULL)
 263                 return tmpdir;
 264
 265         if(tmpdir == NULL)
 266                 tmpdir = try_dir(getenv("TMPDIR"));
 267         if(tmpdir == NULL)
 268                 tmpdir = try_dir(getenv("TMP"));
 269         if(tmpdir == NULL)
 270                 tmpdir = try_dir(getenv("TEMP"));
 271
 272 #ifdef P_tmpdir
 273         if(tmpdir == NULL)
 274                 tmpdir = try_dir(P_tmpdir);
 275 #endif
 276
 277         if(tmpdir == NULL)
 278                 tmpdir = try_dir("/var/tmp");
 279         if(tmpdir == NULL)
 280                 tmpdir = try_dir("/usr/tmp");
 281         if(tmpdir == NULL)
 282                 tmpdir = try_dir("/tmp");
 283
 284         if(tmpdir == NULL)
 285                 tmpdir = ".";
 286
 287         return tmpdir;
 288 }
 289
 290 #ifndef HAVE_MKSTEMP
 291 /* cheap and nasty mkstemp replacement */
 292 static int mkstemp(char *templ)
 293 {
 294         mktemp(templ);
 295         return open(templ, O_RDWR|O_CREAT|O_EXCL|O_BINARY, 0600);
 296 }
 297 #endif
 298
 299 /**
 300  * an own version of tmpnam, which: writes in a buffer, appends a user specified
 301  * suffix, emits no warnings during linking (like glibc/gnu ld do for tmpnam)...
 302  */
 303 static FILE *make_temp_file(char *buffer, size_t buflen,
 304                             const char *prefix, const char *suffix)
 305 {
 306         const char *tempdir = get_tempdir();
 307
 308         /* oh well... mkstemp doesn't accept a suffix after XXXXXX... */
 309         (void) suffix;
 310         suffix = "";
 311
 312         snprintf(buffer, buflen, "%s/%sXXXXXX%s", tempdir, prefix, suffix);
 313
 314         int fd = mkstemp(buffer);
 315         if(fd == -1) {
 316                 fprintf(stderr, "couldn't create temporary file: %s\n",
 317                         strerror(errno));
 318                 exit(1);
 319         }
 320         FILE *out = fdopen(fd, "w");
 321         if(out == NULL) {
 322                 fprintf(stderr, "couldn't create temporary file FILE*\n");
 323                 exit(1);
 324         }
 325
 326         return out;
 327 }
 328
 329 /**
 330  * Do the necessary lowering for compound parameters.
 331  */
 332 void lower_compound_params(void)
 333 {
 334         lower_params_t params;
 335
 336         params.def_ptr_alignment    = 4;
 337         params.flags                = LF_COMPOUND_RETURN | LF_RETURN_HIDDEN;
 338         params.hidden_params        = ADD_HIDDEN_ALWAYS_IN_FRONT;
 339         params.find_pointer_type    = NULL;
 340         params.ret_compound_in_regs = NULL;
 341         lower_calls_with_compounds(&params);
 342 }
 343
 344 typedef enum compile_mode_t {
 345         BenchmarkParser,
 346         PreprocessOnly,
 347         ParseOnly,
 348         Compile,
 349         CompileDump,
 350         CompileAssemble,
 351         CompileAssembleLink,
 352         LexTest,
 353         PrintAst,
 354         PrintFluffy
 355 } compile_mode_t;
 356
 357 static void usage(const char *argv0)
 358 {
 359         fprintf(stderr, "Usage %s input [-o output] [-c]\n", argv0);
 360 }
 361
 362 int main(int argc, char **argv)
 363 {
 364         initialize_firm();
 365
 366         const char     *input        = NULL;
 367         const char     *outname      = NULL;
 368         const char     *dumpfunction = NULL;
 369         compile_mode_t  mode         = CompileAssembleLink;
 370         int             opt_level    = 1;
 371         int             result       = EXIT_SUCCESS;
 372         char            cpu_arch[16] = "ia32";
 373
 374         obstack_init(&cppflags_obst);
 375         obstack_init(&ldflags_obst);
 376
 377 #define GET_ARG_AFTER(def, args)                                             \
 378         def = &arg[sizeof(args)-1];                                              \
 379         if(def[0] == '\0') {                                                     \
 380                 ++i;                                                                 \
 381                 if(i >= argc) {                                                      \
 382                         fprintf(stderr, "error: expected argument after '" args "'\n");  \
 383                         argument_errors = true;                                          \
 384                         break;                                                           \
 385                 }                                                                    \
 386                 def = argv[i];                                                       \
 387                 if(def[0] == '-' && def[1] != '\0') {                                \
 388                         fprintf(stderr, "error: expected argument after '" args "'\n");  \
 389                         argument_errors = true;                                          \
 390                         continue;                                                        \
 391                 }                                                                    \
 392         }
 393
 394 #define SINGLE_OPTION(ch) (option[0] == (ch) && option[1] == '\0')
 395
 396         /* early options parsing (find out optimisation level) */
 397         for(int i = 1; i < argc; ++i) {
 398                 const char *arg = argv[i];
 399                 if(arg[0] != '-')
 400                         continue;
 401
 402                 const char *option = &arg[1];
 403                 if(option[0] == 'O') {
 404                         sscanf(&option[1], "%d", &opt_level);
 405                 }
 406         }
 407
 408         /* apply optimisation level */
 409         switch(opt_level) {
 410         case 0:
 411                 firm_option("no-opt");
 412                 break;
 413         case 1:
 414                 firm_option("no-inline");
 415                 break;
 416         default:
 417         case 4:
 418                 firm_option("strict-aliasing");
 419                 /* fallthrough */
 420         case 3:
 421                 firm_option("cond-eval");
 422                 firm_option("if-conv");
 423                 /* fallthrough */
 424         case 2:
 425                 firm_option("inline");
 426                 firm_option("deconv");
 427                 firm_be_option("omitfp");
 428                 break;
 429         }
 430
 431         /* parse rest of options */
 432         bool help_displayed  = false;
 433         bool argument_errors = false;
 434         for(int i = 1; i < argc; ++i) {
 435                 const char *arg = argv[i];
 436                 if(arg[0] == '-') {
 437                         /* an option */
 438                         const char *option = &arg[1];
 439                         if(option[0] == 'o') {
 440                                 GET_ARG_AFTER(outname, "-o");
 441                         } else if(option[0] == 'g') {
 442                                 firm_be_option("stabs=yes");
 443                                 firm_be_option("omitfp=no");
 444                                 firm_be_option("ia32-nooptcc=yes");
 445                         } else if(SINGLE_OPTION('c')) {
 446                                 mode = CompileAssemble;
 447                         } else if(SINGLE_OPTION('E')) {
 448                                 mode = PreprocessOnly;
 449                         } else if(SINGLE_OPTION('S')) {
 450                                 mode = Compile;
 451                         } else if(option[0] == 'O') {
 452                                 continue;
 453                         } else if(option[0] == 'I') {
 454                                 const char *opt;
 455                                 GET_ARG_AFTER(opt, "-I");
 456                                 obstack_printf(&cppflags_obst, " -I%s", opt);
 457                         } else if(option[0] == 'D') {
 458                                 const char *opt;
 459                                 GET_ARG_AFTER(opt, "-D");
 460                                 obstack_printf(&cppflags_obst, " -D%s", opt);
 461                         } else if(option[0] == 'U') {
 462                                 const char *opt;
 463                                 GET_ARG_AFTER(opt, "-U");
 464                                 obstack_printf(&cppflags_obst, " -U%s", opt);
 465                         } else if(option[0] == 'l') {
 466                                 const char *opt;
 467                                 GET_ARG_AFTER(opt, "-l");
 468                                 obstack_printf(&ldflags_obst, " -l%s", opt);
 469                         } else if(option[0] == 'L') {
 470                                 const char *opt;
 471                                 GET_ARG_AFTER(opt, "-L");
 472                                 obstack_printf(&ldflags_obst, " -L%s", opt);
 473                         } else if(SINGLE_OPTION('v')) {
 474                                 verbose = 1;
 475                         } else if(SINGLE_OPTION('w')) {
 476                                 inhibit_all_warnings = true;
 477                         } else if(option[0] == 'f') {
 478                                 const char *opt;
 479                                 GET_ARG_AFTER(opt, "-f");
 480
 481                                 if(strcmp(opt, "syntax-only") == 0) {
 482                                         mode = ParseOnly;
 483                                 } else if(strcmp(opt, "omit-frame-pointer") == 0) {
 484                                         firm_be_option("omitfp");
 485                                 } else if(strcmp(opt, "no-omit-frame-pointer") == 0) {
 486                                         firm_be_option("omitfp=no");
 487                                 } else {
 488                                         int res = firm_option(opt);
 489                                         if (res == 0) {
 490                                                 fprintf(stderr, "error: unknown Firm option '-f %s'\n",
 491                                                         opt);
 492                                                 argument_errors = true;
 493                                                 continue;
 494                                         } else if (res == -1) {
 495                                                 help_displayed = true;
 496                                         }
 497                                 }
 498                         } else if(option[0] == 'b') {
 499                                 const char *opt;
 500                                 GET_ARG_AFTER(opt, "-b");
 501                                 int res = firm_be_option(opt);
 502                                 if (res == 0) {
 503                                         fprintf(stderr, "error: unknown Firm backend option '-b %s'\n",
 504                                                 opt);
 505                                         argument_errors = true;
 506                                 } else if (res == -1) {
 507                                         help_displayed = true;
 508                                 } else {
 509                                         if (strncmp(opt, "isa=", 4) == 0)
 510                                                 strncpy(cpu_arch, opt, sizeof(cpu_arch));
 511                                 }
 512                         } else if(option[0] == 'W') {
 513                                 set_warning_opt(&option[1]);
 514                         } else if(option[0] == 'm') {
 515                                 const char *opt;
 516                                 char arch_opt[64];
 517
 518                                 GET_ARG_AFTER(opt, "-m");
 519                                 if(strncmp(opt, "arch=", 5) == 0) {
 520                                         GET_ARG_AFTER(opt, "-march=");
 521                                         snprintf(arch_opt, sizeof(arch_opt), "%s-arch=%s", cpu_arch, opt);
 522                                         int res = firm_be_option(arch_opt);
 523                                         if (res == 0)
 524                                                 argument_errors = true;
 525                                         else {
 526                                                 snprintf(arch_opt, sizeof(arch_opt), "%s-opt=%s", cpu_arch, opt);
 527                                                 int res = firm_be_option(arch_opt);
 528                                                 if (res == 0)
 529                                                         argument_errors = true;
 530                                         }
 531                                 } else if(strncmp(opt, "tune=", 5) == 0) {
 532                                         GET_ARG_AFTER(opt, "-mtune=");
 533                                         snprintf(arch_opt, sizeof(arch_opt), "%s-opt=%s", cpu_arch, opt);
 534                                         int res = firm_be_option(arch_opt);
 535                                         if (res == 0)
 536                                                 argument_errors = true;
 537                                 } else if(strncmp(opt, "cpu=", 4) == 0) {
 538                                         GET_ARG_AFTER(opt, "-mcpu=");
 539                                         snprintf(arch_opt, sizeof(arch_opt), "%s-arch=%s", cpu_arch, opt);
 540                                         int res = firm_be_option(arch_opt);
 541                                         if (res == 0)
 542                                                 argument_errors = true;
 543                                 } else if(strncmp(opt, "fpu=", 4) == 0) {
 544                                         GET_ARG_AFTER(opt, "-mfpu=");
 545                                         snprintf(arch_opt, sizeof(arch_opt), "%s-fpunit=%s", cpu_arch, opt);
 546                                         int res = firm_be_option(arch_opt);
 547                                         if (res == 0)
 548                                                 argument_errors = true;
 549                                 } else {
 550                                         char *endptr;
 551                                         long int value = strtol(opt, &endptr, 10);
 552                                         if (*endptr != '\0') {
 553                                                 fprintf(stderr, "error: wrong option '-m %s'\n",  opt);
 554                                                 argument_errors = true;
 555                                         }
 556                                         if (value != 16 && value != 32 && value != 64) {
 557                                                 fprintf(stderr, "error: option -m supports only 16, 32 or 64\n");
 558                                                 argument_errors = true;
 559                                         } else {
 560                                                 machine_size = (unsigned int)value;
 561                                         }
 562                                 }
 563                         } else if (option[0] == '\0') {
 564                                 if(input != NULL) {
 565                                         fprintf(stderr, "error: multiple input files specified\n");
 566                                         argument_errors = true;
 567                                 } else {
 568                                         input = arg;
 569                                 }
 570                         } else if(strcmp(option, "pg") == 0) {
 571                                 firm_be_option("-b gprof");
 572                                 obstack_printf(&ldflags_obst, " -pg");
 573                         } else if(strcmp(option, "pedantic") == 0) {
 574                                 fprintf(stderr, "warning: ignoring gcc option '%s'\n", arg);
 575                         } else if(strncmp(option, "std=", 4) == 0) {
 576                                 if(strcmp(&option[4], "c99") == 0) {
 577                                         c_mode = _C89|_C99;
 578                                 } else if(strcmp(&option[4], "c89") == 0) {
 579                                         c_mode = _C89;
 580                                 } else if(strcmp(&option[4], "gnu99") == 0) {
 581                                         c_mode = _C89|_C99|_GNUC;
 582                                 } else if(strcmp(&option[4], "microsoft") == 0) {
 583                                         c_mode = _C89|_C99|_MS;
 584                                 } else
 585                                         fprintf(stderr, "warning: ignoring gcc option '%s'\n", arg);
 586                         } else if (option[0] == '-') {
 587                                 /* double dash option */
 588                                 ++option;
 589                                 if(strcmp(option, "gcc") == 0) {
 590                                         c_mode |= _GNUC;
 591                                 } else if(strcmp(option, "no-gcc") == 0) {
 592                                         c_mode &= ~_GNUC;
 593                                 } else if(strcmp(option, "ms") == 0) {
 594                                         c_mode |= _MS;
 595                                 } else if(strcmp(option, "no-ms") == 0) {
 596                                         c_mode &= ~_MS;
 597                                 } else if(strcmp(option, "signed-chars") == 0) {
 598                                         char_is_signed = true;
 599                                 } else if(strcmp(option, "unsigned-chars") == 0) {
 600                                         char_is_signed = false;
 601                                 } else if(strcmp(option, "strict") == 0) {
 602                                         strict_mode = true;
 603                                 } else if(strcmp(option, "lextest") == 0) {
 604                                         mode = LexTest;
 605                                 } else if(strcmp(option, "benchmark") == 0) {
 606                                         mode = BenchmarkParser;
 607                                 } else if(strcmp(option, "print-ast") == 0) {
 608                                         mode = PrintAst;
 609                                 } else if(strcmp(option, "print-implicit-cast") == 0) {
 610                                         print_implicit_casts = true;
 611                                 } else if(strcmp(option, "print-parenthesis") == 0) {
 612                                         print_parenthesis = true;
 613                                 } else if(strcmp(option, "print-fluffy") == 0) {
 614                                         mode = PrintFluffy;
 615                                 } else if(strcmp(option, "version") == 0) {
 616                                         firm_version_t ver;
 617                                         firm_get_version(&ver);
 618                                         printf("cparser (%s) using libFirm (%u.%u",
 619                                                cparser_REVISION, ver.major, ver.minor);
 620                                         if(ver.revision[0] != 0) {
 621                                                 putchar(' ');
 622                                                 fputs(ver.revision, stdout);
 623                                         }
 624                                         if(ver.build[0] != 0) {
 625                                                 putchar(' ');
 626                                                 fputs(ver.build, stdout);
 627                                         }
 628                                         puts(")\n");
 629                                         exit(EXIT_SUCCESS);
 630                                 } else if(strcmp(option, "dump-function") == 0) {
 631                                         ++i;
 632                                         if(i >= argc) {
 633                                                 fprintf(stderr, "error: "
 634                                                         "expected argument after '--dump-function'\n");
 635                                                 argument_errors = true;
 636                                                 break;
 637                                         }
 638                                         dumpfunction = argv[i];
 639                                         mode         = CompileDump;
 640                                 } else {
 641                                         fprintf(stderr, "error: unknown argument '%s'\n", arg);
 642                                         argument_errors = true;
 643                                 }
 644                         } else {
 645                                 fprintf(stderr, "error: unknown argument '%s'\n", arg);
 646                                 argument_errors = true;
 647                         }
 648                 } else {
 649                         if(input != NULL) {
 650                                 fprintf(stderr, "error: multiple input files specified\n");
 651                                 argument_errors = true;
 652                         } else {
 653                                 input = arg;
 654                         }
 655                 }
 656         }
 657
 658         /* we do the lowering in ast2firm */
 659         firm_opt.lower_bitfields = FALSE;
 660
 661         if(help_displayed) {
 662                 return !argument_errors;
 663         }
 664         if(argument_errors) {
 665                 usage(argv[0]);
 666                 return 1;
 667         }
 668
 669         gen_firm_init();
 670         init_symbol_table();
 671         init_tokens();
 672         init_types();
 673         init_typehash();
 674         init_basic_types();
 675         init_lexer();
 676         init_ast();
 677         init_parser();
 678         init_ast2firm();
 679
 680         FILE *out = NULL;
 681         char  outnamebuf[4096];
 682         if(outname == NULL) {
 683                 switch(mode) {
 684                 case BenchmarkParser:
 685                 case PrintAst:
 686                 case PrintFluffy:
 687                 case LexTest:
 688                         if(outname == NULL)
 689                                 outname = "-";
 690                         break;
 691                 case PreprocessOnly:
 692                         break;
 693                 case ParseOnly:
 694                         break;
 695                 case Compile:
 696                         get_output_name(outnamebuf, sizeof(outnamebuf), input, ".s");
 697                         outname = outnamebuf;
 698                         break;
 699                 case CompileAssemble:
 700                         get_output_name(outnamebuf, sizeof(outnamebuf), input, ".o");
 701                         outname = outnamebuf;
 702                         break;
 703                 case CompileDump:
 704                         get_output_name(outnamebuf, sizeof(outnamebuf), dumpfunction,
 705                                         ".vcg");
 706                         outname = outnamebuf;
 707                         break;
 708                 case CompileAssembleLink:
 709 #ifdef _WIN32
 710                         /* Windows compiler typically derive the output name from
 711                            the first source file */
 712                         get_output_name(outnamebuf, sizeof(outnamebuf), input, ".exe");
 713                         outname = outnamebuf;
 714 #else
 715                         outname = "a.out";
 716 #endif
 717                         break;
 718                 }
 719         }
 720
 721         if(outname != NULL) {
 722                 if(strcmp(outname, "-") == 0) {
 723                         out = stdout;
 724                 } else {
 725                         out = fopen(outname, "w");
 726                         if(out == NULL) {
 727                                 fprintf(stderr, "Couldn't open '%s' for writing: %s\n", outname,
 728                                         strerror(errno));
 729                                 return 1;
 730                         }
 731                 }
 732         }
 733
 734         FILE *in;
 735         if(input == NULL) {
 736                 fprintf(stderr, "%s: no input files\n", argv[0]);
 737                 return 1;
 738         } else if(strcmp(input, "-") == 0) {
 739                 in    = stdin;
 740                 input = "<stdin>";
 741         } else {
 742                 in = fopen(input, "r");
 743                 if(in == NULL) {
 744                         fprintf(stderr, "Couldn't open '%s': %s\n", input, strerror(errno));
 745                         return 1;
 746                 }
 747         }
 748
 749         if(mode == LexTest) {
 750                 lextest(in, input);
 751                 fclose(in);
 752                 return 0;
 753         }
 754
 755         FILE *preprocessed_in = preprocess(in, input, mode == PreprocessOnly);
 756         translation_unit_t *const unit = do_parsing(preprocessed_in, input);
 757         int res = pclose(preprocessed_in);
 758         if(res != 0) {
 759                 return res;
 760         }
 761
 762         if(error_count > 0) {
 763                 /* parsing failed because of errors */
 764                 fprintf(stderr, "%u error(s), %u warning(s)\n", error_count, warning_count);
 765                 result = EXIT_FAILURE;
 766         } else if(warning_count > 0) {
 767                 fprintf(stderr, "%u warning(s)\n", warning_count);
 768         }
 769
 770         if(mode == BenchmarkParser) {
 771                 return result;
 772         }
 773
 774         /* prints the AST even if errors occurred */
 775         if(mode == PrintAst) {
 776                 type_set_output(out);
 777                 ast_set_output(out);
 778                 print_ast(unit);
 779                 return result;
 780         }
 781
 782         /* cannot handle other modes with errors */
 783         if(result != EXIT_SUCCESS)
 784                 return result;
 785
 786         if(mode == PrintFluffy) {
 787                 type_set_output(out);
 788                 ast_set_output(out);
 789                 write_fluffy_decls(out, unit);
 790         }
 791
 792         translation_unit_to_firm(unit);
 793
 794         if(mode == ParseOnly) {
 795                 return 0;
 796         }
 797
 798         FILE *asm_out;
 799         char  asm_tempfile[1024];
 800         if(mode == CompileDump) {
 801                 asm_out = NULL;
 802                 firm_be_opt.selection = BE_NONE;
 803         } else if(mode == Compile) {
 804                 asm_out = out;
 805         } else {
 806                 asm_out
 807                         = make_temp_file(asm_tempfile, sizeof(asm_tempfile), "cc", ".s");
 808         }
 809         gen_firm_finish(asm_out, input, /*c_mode=*/1, /*firm_const_exists=*/0);
 810
 811         if(mode == CompileDump) {
 812                 /* find irg */
 813                 ident    *id     = new_id_from_str(dumpfunction);
 814                 ir_graph *irg    = NULL;
 815                 int       n_irgs = get_irp_n_irgs();
 816                 for(int i = 0; i < n_irgs; ++i) {
 817                         ir_graph *tirg   = get_irp_irg(i);
 818                         ident    *irg_id = get_entity_ident(get_irg_entity(tirg));
 819                         if(irg_id == id) {
 820                                 irg = tirg;
 821                                 break;
 822                         }
 823                 }
 824
 825                 if(irg == NULL) {
 826                         fprintf(stderr, "No graph for function '%s' found\n", dumpfunction);
 827                         return 1;
 828                 }
 829
 830                 dump_ir_block_graph_file(irg, out);
 831                 fclose(out);
 832                 return 0;
 833         }
 834
 835         fclose(asm_out);
 836
 837         /* assemble assembler and create object file */
 838         char obj_tfile[1024];
 839         if(mode == CompileAssemble || mode == CompileAssembleLink) {
 840                 const char *obj_outfile;
 841                 if(mode == CompileAssemble) {
 842                         fclose(out);
 843                         obj_outfile = outname;
 844                 } else {
 845                         FILE *tempf
 846                                 = make_temp_file(obj_tfile, sizeof(obj_tfile), "cc", ".o");
 847                         fclose(tempf);
 848                         obj_outfile = obj_tfile;
 849                 }
 850
 851                 assemble(obj_outfile, asm_tempfile);
 852         }
 853
 854         /* link object file */
 855         if(mode == CompileAssembleLink) {
 856                 do_link(outname, obj_tfile);
 857         }
 858
 859         obstack_free(&cppflags_obst, NULL);
 860         obstack_free(&ldflags_obst, NULL);
 861
 862         exit_ast2firm();
 863         exit_parser();
 864         exit_ast();
 865         exit_lexer();
 866         exit_typehash();
 867         exit_types();
 868         exit_tokens();
 869         exit_symbol_table();
 870         return 0;
 871 }