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 "write_caml.h"
  79 #include "revision.h"
  80 #include "warning.h"
  81
  82 #ifndef PREPROCESSOR
  83 #define PREPROCESSOR "cpp -std=c99 -U__WCHAR_TYPE__ -D__WCHAR_TYPE__=int -U__SIZE_TYPE__ -D__SIZE_TYPE__=__SIZE_TYPE__ -m32 -U__STRICT_ANSI__"
  84 #endif
  85
  86 #ifndef LINKER
  87 #define LINKER    "gcc -m32"
  88 #endif
  89
  90 #ifndef ASSEMBLER
  91 #define ASSEMBLER "as --32"
  92 #endif
  93
  94 /** The current c mode/dialect. */
  95 unsigned int c_mode = _C89|_C99|_GNUC;
  96
  97 /** The 'machine size', 16, 32 or 64 bit, 32bit is the default. */
  98 unsigned int machine_size = 32;
  99
 100 /** true if the char type is signed. */
 101 bool char_is_signed = true;
 102
 103 /** true for strict language checking. */
 104 bool strict_mode = false;
 105
 106 /** use builtins for some libc functions */
 107 bool use_builtins = false;
 108
 109 /* to switch on printing of implicit casts */
 110 extern bool print_implicit_casts;
 111
 112 /* to switch on printing of parenthesis to indicate operator precedence */
 113 extern bool print_parenthesis;
 114
 115 static int             verbose;
 116 static struct obstack  cppflags_obst, ldflags_obst;
 117 static char            dep_target[1024];
 118 static const char     *outname;
 119
 120 typedef struct file_list_entry_t file_list_entry_t;
 121
 122 typedef enum filetype_t {
 123         FILETYPE_AUTODETECT,
 124         FILETYPE_C,
 125         FILETYPE_PREPROCESSED_C,
 126         FILETYPE_ASSEMBLER,
 127         FILETYPE_PREPROCESSED_ASSEMBLER,
 128         FILETYPE_OBJECT,
 129         FILETYPE_UNKNOWN
 130 } filetype_t;
 131
 132 struct file_list_entry_t {
 133         const char        *name; /**< filename or NULL for stdin */
 134         filetype_t         type;
 135         file_list_entry_t *next;
 136 };
 137
 138 #if defined(_DEBUG) || defined(FIRM_DEBUG)
 139 /**
 140  * Debug printf implementation.
 141  *
 142  * @param fmt  printf style format parameter
 143  */
 144 void dbg_printf(const char *fmt, ...)
 145 {
 146         va_list list;
 147
 148         if (firm_dump.debug_print) {
 149                 va_start(list, fmt);
 150                 vprintf(fmt, list);
 151                 va_end(list);
 152         }  /* if */
 153 }
 154 #endif /* defined(_DEBUG) || defined(FIRM_DEBUG) */
 155
 156 static void initialize_firm(void)
 157 {
 158         firm_early_init();
 159
 160         dump_consts_local(1);
 161         dump_keepalive_edges(1);
 162 }
 163
 164 static void get_output_name(char *buf, size_t buflen, const char *inputname,
 165                             const char *newext)
 166 {
 167         size_t last_dot = 0xffffffff;
 168         size_t i = 0;
 169
 170         if(inputname == NULL) {
 171                 snprintf(buf, buflen, "a%s", newext);
 172                 return;
 173         }
 174
 175         for(const char *c = inputname; *c != 0; ++c) {
 176                 if(*c == '.')
 177                         last_dot = i;
 178                 ++i;
 179         }
 180         if(last_dot == 0xffffffff)
 181                 last_dot = i;
 182
 183         if(last_dot >= buflen)
 184                 panic("filename too long");
 185         memcpy(buf, inputname, last_dot);
 186
 187         size_t extlen = strlen(newext) + 1;
 188         if(extlen + last_dot >= buflen)
 189                 panic("filename too long");
 190         memcpy(buf+last_dot, newext, extlen);
 191 }
 192
 193 #include "builtins.h"
 194
 195 static translation_unit_t *do_parsing(FILE *const in, const char *const input_name)
 196 {
 197         start_parsing();
 198
 199         if (use_builtins) {
 200                 lexer_open_buffer(builtins, sizeof(builtins)-1, "<builtin>");
 201                 parse();
 202         }
 203
 204         lexer_open_stream(in, input_name);
 205         parse();
 206
 207         translation_unit_t *unit = finish_parsing();
 208         return unit;
 209 }
 210
 211 static void lextest(FILE *in, const char *fname)
 212 {
 213         lexer_open_stream(in, fname);
 214
 215         do {
 216                 lexer_next_preprocessing_token();
 217                 print_token(stdout, &lexer_token);
 218                 puts("");
 219         } while(lexer_token.type != T_EOF);
 220 }
 221
 222 static void add_flag(struct obstack *obst, const char *format, ...)
 223 {
 224         va_list ap;
 225         va_start(ap, format);
 226
 227         char buf[4096];
 228         vsnprintf(buf, sizeof(buf), format, ap);
 229
 230         /* escape stuff... */
 231         obstack_1grow(obst, ' ');
 232         for (char *c = buf; *c != '\0'; ++c) {
 233                 switch(*c) {
 234                 case '"':
 235                 case '\'':
 236                 case '`':
 237                 case ' ':
 238                 case '\t':
 239                 case '\n':
 240                 case '\r':
 241                 case '\\':
 242                 case '$':
 243                 case '(':
 244                 case ')':
 245                         obstack_1grow(obst, '\\');
 246                         /* fallthrough */
 247                 default:
 248                         obstack_1grow(obst, *c);
 249                         break;
 250                 }
 251         }
 252
 253         va_end(ap);
 254 }
 255
 256 static FILE *preprocess(const char *fname)
 257 {
 258         obstack_1grow(&cppflags_obst, '\0');
 259         const char *flags = obstack_finish(&cppflags_obst);
 260
 261         obstack_printf(&cppflags_obst, "%s", PREPROCESSOR);
 262         if (dep_target[0] != '\0') {
 263                 add_flag(&cppflags_obst, "-MF");
 264                 add_flag(&cppflags_obst, "%s", dep_target);
 265                 if (outname != NULL) {
 266                                 add_flag(&cppflags_obst, "-MQ");
 267                                 add_flag(&cppflags_obst, "%s", outname);
 268                 }
 269         }
 270         if (flags[0] != '\0') {
 271                 obstack_printf(&cppflags_obst, " %s", flags);
 272         }
 273         add_flag(&cppflags_obst, "%s", fname);
 274
 275         obstack_1grow(&cppflags_obst, '\0');
 276         const char *buf = obstack_finish(&cppflags_obst);
 277         if(verbose) {
 278                 puts(buf);
 279         }
 280
 281         FILE *f = popen(buf, "r");
 282         if(f == NULL) {
 283                 fprintf(stderr, "invoking preprocessor failed\n");
 284                 exit(1);
 285         }
 286
 287         return f;
 288 }
 289
 290 static void assemble(const char *out, const char *in)
 291 {
 292         char buf[4096];
 293
 294         snprintf(buf, sizeof(buf), "%s %s -o %s", ASSEMBLER, in, out);
 295         if(verbose) {
 296                 puts(buf);
 297         }
 298
 299         int err = system(buf);
 300         if(err != 0) {
 301                 fprintf(stderr, "assembler reported an error\n");
 302                 exit(1);
 303         }
 304 }
 305
 306 static const char *try_dir(const char *dir)
 307 {
 308         if(dir == NULL)
 309                 return dir;
 310         if(access(dir, R_OK | W_OK | X_OK) == 0)
 311                 return dir;
 312         return NULL;
 313 }
 314
 315 static const char *get_tempdir(void)
 316 {
 317         static const char *tmpdir = NULL;
 318
 319         if(tmpdir != NULL)
 320                 return tmpdir;
 321
 322         if(tmpdir == NULL)
 323                 tmpdir = try_dir(getenv("TMPDIR"));
 324         if(tmpdir == NULL)
 325                 tmpdir = try_dir(getenv("TMP"));
 326         if(tmpdir == NULL)
 327                 tmpdir = try_dir(getenv("TEMP"));
 328
 329 #ifdef P_tmpdir
 330         if(tmpdir == NULL)
 331                 tmpdir = try_dir(P_tmpdir);
 332 #endif
 333
 334         if(tmpdir == NULL)
 335                 tmpdir = try_dir("/var/tmp");
 336         if(tmpdir == NULL)
 337                 tmpdir = try_dir("/usr/tmp");
 338         if(tmpdir == NULL)
 339                 tmpdir = try_dir("/tmp");
 340
 341         if(tmpdir == NULL)
 342                 tmpdir = ".";
 343
 344         return tmpdir;
 345 }
 346
 347 #ifndef HAVE_MKSTEMP
 348 /* cheap and nasty mkstemp replacement */
 349 static int mkstemp(char *templ)
 350 {
 351         mktemp(templ);
 352         return open(templ, O_RDWR|O_CREAT|O_EXCL|O_BINARY, 0600);
 353 }
 354 #endif
 355
 356 /**
 357  * an own version of tmpnam, which: writes in a buffer, emits no warnings
 358  * during linking (like glibc/gnu ld do for tmpnam)...
 359  */
 360 static FILE *make_temp_file(char *buffer, size_t buflen, const char *prefix)
 361 {
 362         const char *tempdir = get_tempdir();
 363
 364         snprintf(buffer, buflen, "%s/%sXXXXXX", tempdir, prefix);
 365
 366         int fd = mkstemp(buffer);
 367         if(fd == -1) {
 368                 fprintf(stderr, "couldn't create temporary file: %s\n",
 369                         strerror(errno));
 370                 exit(1);
 371         }
 372         FILE *out = fdopen(fd, "w");
 373         if(out == NULL) {
 374                 fprintf(stderr, "couldn't create temporary file FILE*\n");
 375                 exit(1);
 376         }
 377
 378         return out;
 379 }
 380
 381 /**
 382  * Do the necessary lowering for compound parameters.
 383  */
 384 void lower_compound_params(void)
 385 {
 386         lower_params_t params;
 387
 388         params.def_ptr_alignment    = 4;
 389         params.flags                = LF_COMPOUND_RETURN | LF_RETURN_HIDDEN;
 390         params.hidden_params        = ADD_HIDDEN_ALWAYS_IN_FRONT;
 391         params.find_pointer_type    = NULL;
 392         params.ret_compound_in_regs = NULL;
 393         lower_calls_with_compounds(&params);
 394 }
 395
 396 typedef enum compile_mode_t {
 397         BenchmarkParser,
 398         PreprocessOnly,
 399         ParseOnly,
 400         Compile,
 401         CompileDump,
 402         CompileAssemble,
 403         CompileAssembleLink,
 404         LexTest,
 405         PrintAst,
 406         PrintFluffy,
 407         PrintCaml
 408 } compile_mode_t;
 409
 410 static void usage(const char *argv0)
 411 {
 412         fprintf(stderr, "Usage %s input [-o output] [-c]\n", argv0);
 413 }
 414
 415 static void print_cparser_version(void) {
 416         firm_version_t ver;
 417         firm_get_version(&ver);
 418
 419         printf("cparser (%s) using libFirm (%u.%u",
 420                 cparser_REVISION, ver.major, ver.minor);
 421         if(ver.revision[0] != 0) {
 422                 putchar(' ');
 423                 fputs(ver.revision, stdout);
 424         }
 425         if(ver.build[0] != 0) {
 426                 putchar(' ');
 427                 fputs(ver.build, stdout);
 428         }
 429         puts(")\n");
 430 }
 431
 432 static void set_be_option(const char *arg)
 433 {
 434         int res = firm_be_option(arg);
 435         (void) res;
 436         assert(res);
 437 }
 438
 439 static void set_option(const char *arg)
 440 {
 441         int res = firm_option(arg);
 442         (void) res;
 443         assert(res);
 444 }
 445
 446 static void copy_file(FILE *dest, FILE *input)
 447 {
 448         char buf[16384];
 449
 450         while (!feof(input) && !ferror(dest)) {
 451                 size_t read = fread(buf, 1, sizeof(buf), input);
 452                 if(fwrite(buf, 1, read, dest) != read) {
 453                         perror("couldn't write output");
 454                 }
 455         }
 456 }
 457
 458 static inline bool streq(char const* a, char const* b)
 459 {
 460         return strcmp(a, b) == 0;
 461 }
 462
 463 static inline bool strstart(char const* str, char const* start)
 464 {
 465         do {
 466                 if (*start == '\0')
 467                         return true;
 468         } while (*str++ == *start++);
 469         return false;
 470 }
 471
 472 static FILE *open_file(const char *filename)
 473 {
 474         if (streq(filename, "-")) {
 475                 return stdin;
 476         }
 477
 478         FILE *in = fopen(filename, "r");
 479         if(in == NULL) {
 480                 fprintf(stderr, "Couldn't open '%s': %s\n", filename,
 481                                 strerror(errno));
 482                 exit(1);
 483         }
 484
 485         return in;
 486 }
 487
 488 static filetype_t get_filetype_from_string(const char *string)
 489 {
 490         if (streq(string, "c") || streq(string, "c-header"))
 491                 return FILETYPE_C;
 492         if (streq(string, "assembler"))
 493                 return FILETYPE_PREPROCESSED_ASSEMBLER;
 494         if (streq(string, "assembler-with-cpp"))
 495                 return FILETYPE_ASSEMBLER;
 496         if (streq(string, "none"))
 497                 return FILETYPE_AUTODETECT;
 498
 499         return FILETYPE_UNKNOWN;
 500 }
 501
 502 int main(int argc, char **argv)
 503 {
 504         initialize_firm();
 505
 506         const char        *dumpfunction         = NULL;
 507         compile_mode_t     mode                 = CompileAssembleLink;
 508         int                opt_level            = 1;
 509         int                result               = EXIT_SUCCESS;
 510         char               cpu_arch[16]         = "ia32";
 511         file_list_entry_t *files                = NULL;
 512         file_list_entry_t *last_file            = NULL;
 513         bool               construct_dep_target = false;
 514         struct obstack     file_obst;
 515
 516         obstack_init(&cppflags_obst);
 517         obstack_init(&ldflags_obst);
 518         obstack_init(&file_obst);
 519
 520 #define GET_ARG_AFTER(def, args)                                             \
 521         def = &arg[sizeof(args)-1];                                              \
 522         if(def[0] == '\0') {                                                     \
 523                 ++i;                                                                 \
 524                 if(i >= argc) {                                                      \
 525                         fprintf(stderr, "error: expected argument after '" args "'\n");  \
 526                         argument_errors = true;                                          \
 527                         break;                                                           \
 528                 }                                                                    \
 529                 def = argv[i];                                                       \
 530                 if(def[0] == '-' && def[1] != '\0') {                                \
 531                         fprintf(stderr, "error: expected argument after '" args "'\n");  \
 532                         argument_errors = true;                                          \
 533                         continue;                                                        \
 534                 }                                                                    \
 535         }
 536
 537 #define SINGLE_OPTION(ch) (option[0] == (ch) && option[1] == '\0')
 538
 539         /* early options parsing (find out optimisation level) */
 540         for(int i = 1; i < argc; ++i) {
 541                 const char *arg = argv[i];
 542                 if(arg[0] != '-')
 543                         continue;
 544
 545                 const char *option = &arg[1];
 546                 if(option[0] == 'O') {
 547                         sscanf(&option[1], "%d", &opt_level);
 548                 }
 549         }
 550
 551         /* apply optimisation level */
 552         switch(opt_level) {
 553         case 0:
 554                 set_option("no-opt");
 555                 break;
 556         case 1:
 557                 set_option("no-inline");
 558                 break;
 559         default:
 560         case 4:
 561                 set_option("strict-aliasing");
 562                 /* fallthrough */
 563         case 3:
 564                 set_option("cond-eval");
 565                 set_option("if-conv");
 566                 use_builtins = true;
 567                 /* fallthrough */
 568         case 2:
 569                 set_option("inline");
 570                 set_option("deconv");
 571                 set_be_option("omitfp");
 572                 break;
 573         }
 574
 575         /* parse rest of options */
 576         filetype_t  forced_filetype = FILETYPE_AUTODETECT;
 577         bool        help_displayed  = false;
 578         bool        argument_errors = false;
 579         for(int i = 1; i < argc; ++i) {
 580                 const char *arg = argv[i];
 581                 if(arg[0] == '-' && arg[1] != 0) {
 582                         /* an option */
 583                         const char *option = &arg[1];
 584                         if(option[0] == 'o') {
 585                                 GET_ARG_AFTER(outname, "-o");
 586                         } else if(option[0] == 'g') {
 587                                 set_be_option("debuginfo=stabs");
 588                                 set_be_option("omitfp=no");
 589                                 set_be_option("ia32-nooptcc=yes");
 590                         } else if(SINGLE_OPTION('c')) {
 591                                 mode = CompileAssemble;
 592                         } else if(SINGLE_OPTION('E')) {
 593                                 mode = PreprocessOnly;
 594                         } else if(SINGLE_OPTION('S')) {
 595                                 mode = Compile;
 596                         } else if(option[0] == 'O') {
 597                                 continue;
 598                         } else if(option[0] == 'I') {
 599                                 const char *opt;
 600                                 GET_ARG_AFTER(opt, "-I");
 601                                 add_flag(&cppflags_obst, "-I%s", opt);
 602                         } else if(option[0] == 'D') {
 603                                 const char *opt;
 604                                 GET_ARG_AFTER(opt, "-D");
 605                                 add_flag(&cppflags_obst, "-D%s", opt);
 606                         } else if(option[0] == 'U') {
 607                                 const char *opt;
 608                                 GET_ARG_AFTER(opt, "-U");
 609                                 add_flag(&cppflags_obst, "-U%s", opt);
 610                         } else if(option[0] == 'l') {
 611                                 const char *opt;
 612                                 GET_ARG_AFTER(opt, "-l");
 613                                 add_flag(&ldflags_obst, "-l%s", opt);
 614                         } else if(option[0] == 'L') {
 615                                 const char *opt;
 616                                 GET_ARG_AFTER(opt, "-L");
 617                                 add_flag(&ldflags_obst, "-L%s", opt);
 618                         } else if(SINGLE_OPTION('v')) {
 619                                 verbose = 1;
 620                         } else if(SINGLE_OPTION('w')) {
 621                                 inhibit_all_warnings = true;
 622                         } else if(option[0] == 'x') {
 623                                 const char *opt;
 624                                 GET_ARG_AFTER(opt, "-x");
 625                                 forced_filetype = get_filetype_from_string(opt);
 626                                 if (forced_filetype == FILETYPE_UNKNOWN) {
 627                                         fprintf(stderr, "Unknown language '%s'\n", opt);
 628                                         argument_errors = true;
 629                                 }
 630                         } else if (streq(option, "M")) {
 631                                 mode = PreprocessOnly;
 632                                 add_flag(&cppflags_obst, "-M");
 633                         } else if (streq(option, "MMD") ||
 634                                    streq(option, "MD")) {
 635                             construct_dep_target = true;
 636                                 add_flag(&cppflags_obst, "-%s", option);
 637                         } else if(streq(option, "MM")  ||
 638                                    streq(option, "MP")) {
 639                                 add_flag(&cppflags_obst, "-%s", option);
 640                         } else if (streq(option, "MT") ||
 641                                    streq(option, "MQ") ||
 642                                    streq(option, "MF")) {
 643                                 const char *opt;
 644                                 GET_ARG_AFTER(opt, "-MT");
 645                                 add_flag(&cppflags_obst, "-%s", option);
 646                                 add_flag(&cppflags_obst, "%s", opt);
 647                         } else if (streq(option, "pipe")) {
 648                                 /* here for gcc compatibility */
 649                         } else if (option[0] == 'f') {
 650                                 char const *orig_opt;
 651                                 GET_ARG_AFTER(orig_opt, "-f");
 652
 653                                 if (strstart(orig_opt, "align-loops=") ||
 654                                     strstart(orig_opt, "align-jumps=") ||
 655                                     strstart(orig_opt, "align-functions=")) {
 656                                         fprintf(stderr, "ignoring gcc option '-f%s'\n", orig_opt);
 657                                 } else {
 658                                         char const *opt         = orig_opt;
 659                                         bool        truth_value = true;
 660                                         if (opt[0] == 'n' && opt[1] == 'o' && opt[2] == '-') {
 661                                                 truth_value = false;
 662                                                 opt += 3;
 663                                         }
 664
 665                                         if (streq(opt, "dollars-in-identifiers")) {
 666                                                 allow_dollar_in_symbol = truth_value;
 667                                         } else if (streq(opt, "short-wchar")) {
 668                                                 opt_short_wchar_t = truth_value;
 669                                         } else if (streq(opt, "syntax-only")) {
 670                                                 mode = truth_value ? ParseOnly : CompileAssembleLink;
 671                                         } else if (streq(opt, "omit-frame-pointer")) {
 672                                                 set_be_option(truth_value ? "omitfp" : "omitfp=no");
 673                                         } else if (streq(opt, "strength-reduce")) {
 674                                                 firm_option(truth_value ? "strength-red" : "no-strength-red");
 675                                         } else if (streq(opt, "fast-math")               ||
 676                                                    streq(opt, "jump-tables")             ||
 677                                                    streq(opt, "unroll-loops")            ||
 678                                                    streq(opt, "expensive-optimizations") ||
 679                                                    streq(opt, "common")                  ||
 680                                                    streq(opt, "PIC")                     ||
 681                                                    streq(opt, "align-loops")             ||
 682                                                    streq(opt, "align-jumps")             ||
 683                                                    streq(opt, "align-functions")) {
 684                                                 fprintf(stderr, "ignoring gcc option '-f%s'\n", orig_opt);
 685                                         } else {
 686                                                 int res = firm_option(orig_opt);
 687                                                 if (res == 0) {
 688                                                         fprintf(stderr, "error: unknown Firm option '-f%s'\n",
 689                                                                 orig_opt);
 690                                                         argument_errors = true;
 691                                                         continue;
 692                                                 } else if (res == -1) {
 693                                                         help_displayed = true;
 694                                                 }
 695                                         }
 696                                 }
 697                         } else if (option[0] == 'b') {
 698                                 const char *opt;
 699                                 GET_ARG_AFTER(opt, "-b");
 700                                 int res = firm_be_option(opt);
 701                                 if (res == 0) {
 702                                         fprintf(stderr, "error: unknown Firm backend option '-b %s'\n",
 703                                                 opt);
 704                                         argument_errors = true;
 705                                 } else if (res == -1) {
 706                                         help_displayed = true;
 707                                 } else if (strstart(opt, "isa=")) {
 708                                         strncpy(cpu_arch, opt, sizeof(cpu_arch));
 709                                 }
 710                         } else if (option[0] == 'W') {
 711                                 if (strstart(option + 1, "l,")) // a gcc-style linker option
 712                                 {
 713                                         const char *opt;
 714                                         GET_ARG_AFTER(opt, "-Wl,");
 715                                         add_flag(&ldflags_obst, "-Wl,%s", opt);
 716                                 }
 717                                 else set_warning_opt(&option[1]);
 718                         } else if(option[0] == 'm') {
 719                                 /* -m options */
 720                                 const char *opt;
 721                                 char arch_opt[64];
 722
 723                                 GET_ARG_AFTER(opt, "-m");
 724                                 if (strstart(opt, "arch=")) {
 725                                         GET_ARG_AFTER(opt, "-march=");
 726                                         snprintf(arch_opt, sizeof(arch_opt), "%s-arch=%s", cpu_arch, opt);
 727                                         int res = firm_be_option(arch_opt);
 728                                         if (res == 0)
 729                                                 argument_errors = true;
 730                                         else {
 731                                                 snprintf(arch_opt, sizeof(arch_opt), "%s-opt=%s", cpu_arch, opt);
 732                                                 int res = firm_be_option(arch_opt);
 733                                                 if (res == 0)
 734                                                         argument_errors = true;
 735                                         }
 736                                 } else if (strstart(opt, "tune=")) {
 737                                         GET_ARG_AFTER(opt, "-mtune=");
 738                                         snprintf(arch_opt, sizeof(arch_opt), "%s-opt=%s", cpu_arch, opt);
 739                                         int res = firm_be_option(arch_opt);
 740                                         if (res == 0)
 741                                                 argument_errors = true;
 742                                 } else if (strstart(opt, "cpu=")) {
 743                                         GET_ARG_AFTER(opt, "-mcpu=");
 744                                         snprintf(arch_opt, sizeof(arch_opt), "%s-arch=%s", cpu_arch, opt);
 745                                         int res = firm_be_option(arch_opt);
 746                                         if (res == 0)
 747                                                 argument_errors = true;
 748                                 } else if (strstart(opt, "fpmath=")) {
 749                                         GET_ARG_AFTER(opt, "-mfpmath=");
 750                                         if (streq(opt, "387"))
 751                                                 opt = "x87";
 752                                         else if (streq(opt, "sse"))
 753                                                 opt = "sse2";
 754                                         else {
 755                                                 fprintf(stderr, "error: option -mfpumath supports only 387 or sse\n");
 756                                                 argument_errors = true;
 757                                         }
 758                                         if(!argument_errors) {
 759                                                 snprintf(arch_opt, sizeof(arch_opt), "%s-fpunit=%s", cpu_arch, opt);
 760                                                 int res = firm_be_option(arch_opt);
 761                                                 if (res == 0)
 762                                                         argument_errors = true;
 763                                         }
 764                                 } else if (strstart(opt, "preferred-stack-boundary=")) {
 765                                         GET_ARG_AFTER(opt, "-mpreferred-stack-boundary=");
 766                                         snprintf(arch_opt, sizeof(arch_opt), "%s-stackalign=%s", cpu_arch, opt);
 767                                         int res = firm_be_option(arch_opt);
 768                                         if (res == 0)
 769                                                 argument_errors = true;
 770                                 } else if (streq(opt, "omit-leaf-frame-pointer")) {
 771                                         set_be_option("omitleaffp=1");
 772                                 } else if (streq(opt, "no-omit-leaf-frame-pointer")) {
 773                                         set_be_option("omitleaffp=0");
 774                                 } else {
 775                                         char *endptr;
 776                                         long int value = strtol(opt, &endptr, 10);
 777                                         if (*endptr != '\0') {
 778                                                 fprintf(stderr, "error: wrong option '-m %s'\n",  opt);
 779                                                 argument_errors = true;
 780                                         }
 781                                         if (value != 16 && value != 32 && value != 64) {
 782                                                 fprintf(stderr, "error: option -m supports only 16, 32 or 64\n");
 783                                                 argument_errors = true;
 784                                         } else {
 785                                                 machine_size = (unsigned int)value;
 786                                         }
 787                                 }
 788                         } else if (streq(option, "pg")) {
 789                                 set_be_option("gprof");
 790                                 add_flag(&ldflags_obst, "-pg");
 791                         } else if (streq(option, "pedantic") ||
 792                                    streq(option, "ansi")) {
 793                                 fprintf(stderr, "warning: ignoring gcc option '%s'\n", arg);
 794                         } else if (streq(option, "shared")) {
 795                                 add_flag(&ldflags_obst, "-shared");
 796                         } else if (strstart(option, "std=")) {
 797                                 if (streq(&option[4], "c99")) {
 798                                         c_mode = _C89|_C99;
 799                                 } else if (streq(&option[4], "c89")) {
 800                                         c_mode = _C89;
 801                                 } else if (streq(&option[4], "gnu99")) {
 802                                         c_mode = _C89|_C99|_GNUC;
 803                                 } else if (streq(&option[4], "microsoft")) {
 804                                         c_mode = _C89|_C99|_MS;
 805                                 } else
 806                                         fprintf(stderr, "warning: ignoring gcc option '%s'\n", arg);
 807                         } else if (streq(option, "version")) {
 808                                 print_cparser_version();
 809                         } else if (option[0] == '-') {
 810                                 /* double dash option */
 811                                 ++option;
 812                                 if (streq(option, "gcc")) {
 813                                         c_mode |= _GNUC;
 814                                 } else if (streq(option, "no-gcc")) {
 815                                         c_mode &= ~_GNUC;
 816                                 } else if (streq(option, "ms")) {
 817                                         c_mode |= _MS;
 818                                 } else if (streq(option, "no-ms")) {
 819                                         c_mode &= ~_MS;
 820                                 } else if (streq(option, "signed-chars")) {
 821                                         char_is_signed = true;
 822                                 } else if (streq(option, "unsigned-chars")) {
 823                                         char_is_signed = false;
 824                                 } else if (streq(option, "strict")) {
 825                                         strict_mode = true;
 826                                 } else if (streq(option, "lextest")) {
 827                                         mode = LexTest;
 828                                 } else if (streq(option, "benchmark")) {
 829                                         mode = BenchmarkParser;
 830                                 } else if (streq(option, "print-ast")) {
 831                                         mode = PrintAst;
 832                                 } else if (streq(option, "print-implicit-cast")) {
 833                                         print_implicit_casts = true;
 834                                 } else if (streq(option, "print-parenthesis")) {
 835                                         print_parenthesis = true;
 836                                 } else if (streq(option, "print-fluffy")) {
 837                                         mode = PrintFluffy;
 838                                 } else if (streq(option, "print-caml")) {
 839                                         mode = PrintCaml;
 840                                 } else if (streq(option, "version")) {
 841                                         print_cparser_version();
 842                                         exit(EXIT_SUCCESS);
 843                                 } else if (streq(option, "dump-function")) {
 844                                         ++i;
 845                                         if(i >= argc) {
 846                                                 fprintf(stderr, "error: "
 847                                                         "expected argument after '--dump-function'\n");
 848                                                 argument_errors = true;
 849                                                 break;
 850                                         }
 851                                         dumpfunction = argv[i];
 852                                         mode         = CompileDump;
 853                                 } else {
 854                                         fprintf(stderr, "error: unknown argument '%s'\n", arg);
 855                                         argument_errors = true;
 856                                 }
 857                         } else {
 858                                 fprintf(stderr, "error: unknown argument '%s'\n", arg);
 859                                 argument_errors = true;
 860                         }
 861                 } else {
 862                         filetype_t  type     = forced_filetype;
 863                         const char *filename = arg;
 864                         if (type == FILETYPE_AUTODETECT) {
 865                                 size_t const len = strlen(arg);
 866                                 if (len < 2 && arg[0] == '-') {
 867                                         /* - implicitly means C source file */
 868                                         type     = FILETYPE_C;
 869                                         filename = NULL;
 870                                 } else if (len > 2 && arg[len - 2] == '.') {
 871                                         switch (arg[len - 1]) {
 872                                         case 'c': type = FILETYPE_C;                      break;
 873                                         case 'h': type = FILETYPE_C;                      break;
 874                                         case 's': type = FILETYPE_PREPROCESSED_ASSEMBLER; break;
 875                                         case 'S': type = FILETYPE_ASSEMBLER;              break;
 876
 877                                         case 'a':
 878                                         case 'o': type = FILETYPE_OBJECT;                 break;
 879                                         }
 880                                 } else if (len > 3 && arg[len - 3] == '.') {
 881                                         if (streq(arg + len - 2, "so")) {
 882                                                 type = FILETYPE_OBJECT;
 883                                         }
 884                                 }
 885
 886                                 if (type == FILETYPE_AUTODETECT) {
 887                                         fprintf(stderr, "'%s': file format not recognized\n", arg);
 888                                         continue;
 889                                 }
 890                         }
 891
 892                         file_list_entry_t *entry
 893                                 = obstack_alloc(&file_obst, sizeof(entry[0]));
 894                         memset(entry, 0, sizeof(entry[0]));
 895                         entry->name = arg;
 896                         entry->type = type;
 897
 898                         if (last_file != NULL) {
 899                                 last_file->next = entry;
 900                         } else {
 901                                 files = entry;
 902                         }
 903                         last_file = entry;
 904                 }
 905         }
 906
 907         if (files == NULL) {
 908                 fprintf(stderr, "error: no input files specified\n");
 909                 argument_errors = true;
 910         }
 911
 912         if (help_displayed) {
 913                 return !argument_errors;
 914         }
 915         if (argument_errors) {
 916                 usage(argv[0]);
 917                 return 1;
 918         }
 919
 920         /* we do the lowering in ast2firm */
 921         firm_opt.lower_bitfields = FALSE;
 922
 923         gen_firm_init();
 924         init_symbol_table();
 925         init_tokens();
 926         init_types();
 927         init_typehash();
 928         init_basic_types();
 929         init_lexer();
 930         init_ast();
 931         init_parser();
 932         init_ast2firm();
 933
 934         if (construct_dep_target) {
 935                 if (outname != 0 && strlen(outname) >= 2) {
 936                         get_output_name(dep_target, sizeof(dep_target), outname, ".d");
 937                 } else {
 938                         get_output_name(dep_target, sizeof(dep_target), files->name, ".d");
 939                 }
 940         } else {
 941                 dep_target[0] = '\0';
 942         }
 943
 944         char outnamebuf[4096];
 945         if (outname == NULL) {
 946                 const char *filename = files->name;
 947
 948                 switch(mode) {
 949                 case BenchmarkParser:
 950                 case PrintAst:
 951                 case PrintFluffy:
 952                 case PrintCaml:
 953                 case LexTest:
 954                 case PreprocessOnly:
 955                         outname = "-";
 956                         break;
 957                 case ParseOnly:
 958                         break;
 959                 case Compile:
 960                         get_output_name(outnamebuf, sizeof(outnamebuf), filename, ".s");
 961                         outname = outnamebuf;
 962                         break;
 963                 case CompileAssemble:
 964                         get_output_name(outnamebuf, sizeof(outnamebuf), filename, ".o");
 965                         outname = outnamebuf;
 966                         break;
 967                 case CompileDump:
 968                         get_output_name(outnamebuf, sizeof(outnamebuf), dumpfunction,
 969                                         ".vcg");
 970                         outname = outnamebuf;
 971                         break;
 972                 case CompileAssembleLink:
 973 #ifdef _WIN32
 974                         outname = "a.exe";
 975 #else
 976                         outname = "a.out";
 977 #endif
 978                         break;
 979                 }
 980         }
 981
 982         assert(outname != NULL);
 983
 984         FILE *out;
 985         if (streq(outname, "-")) {
 986                 out = stdout;
 987         } else {
 988                 out = fopen(outname, "w");
 989                 if(out == NULL) {
 990                         fprintf(stderr, "Couldn't open '%s' for writing: %s\n", outname,
 991                                         strerror(errno));
 992                         return 1;
 993                 }
 994         }
 995
 996         file_list_entry_t *file;
 997         for (file = files; file != NULL; file = file->next) {
 998                 char        asm_tempfile[1024];
 999                 const char *filename = file->name;
1000                 filetype_t  filetype = file->type;
1001
1002                 if (file->type == FILETYPE_OBJECT)
1003                         continue;
1004
1005                 FILE *in = NULL;
1006                 if (mode == LexTest) {
1007                         if (in == NULL)
1008                                 in = open_file(filename);
1009                         lextest(in, filename);
1010                         fclose(in);
1011                         exit(EXIT_SUCCESS);
1012                 }
1013
1014                 FILE *preprocessed_in = NULL;
1015                 if (filetype == FILETYPE_C || filetype == FILETYPE_ASSEMBLER) {
1016                         /* no support for input on FILE* yet */
1017                         if (in != NULL)
1018                                 panic("internal compiler error: in for preprocessor != NULL");
1019
1020                         preprocessed_in = preprocess(filename);
1021                         if (mode == PreprocessOnly) {
1022                                 copy_file(out, preprocessed_in);
1023                                 int result = pclose(preprocessed_in);
1024                                 fclose(out);
1025                                 return result;
1026                         }
1027
1028                         if (filetype == FILETYPE_C) {
1029                                 filetype = FILETYPE_PREPROCESSED_C;
1030                         } else if (filetype == FILETYPE_ASSEMBLER) {
1031                                 filetype = FILETYPE_PREPROCESSED_ASSEMBLER;
1032                         } else {
1033                                 panic("internal compiler error: unknown filetype at preproc");
1034                         }
1035
1036                         in = preprocessed_in;
1037                 }
1038
1039                 FILE *asm_out;
1040                 if(mode == Compile) {
1041                         asm_out = out;
1042                 } else {
1043                         asm_out = make_temp_file(asm_tempfile, sizeof(asm_tempfile),
1044                                                  "ccs");
1045                 }
1046
1047                 if (in == NULL)
1048                         in = open_file(filename);
1049
1050                 /* preprocess and compile */
1051                 if (filetype == FILETYPE_PREPROCESSED_C) {
1052                         translation_unit_t *const unit = do_parsing(in, filename);
1053                         if (in == preprocessed_in) {
1054                                 int pp_result = pclose(preprocessed_in);
1055                                 if (pp_result != EXIT_SUCCESS) {
1056                                         exit(EXIT_FAILURE);
1057                                 }
1058                         }
1059
1060                         /* prints the AST even if errors occurred */
1061                         if (mode == PrintAst) {
1062                                 type_set_output(out);
1063                                 ast_set_output(out);
1064                                 print_ast(unit);
1065                         }
1066
1067                         if(error_count > 0) {
1068                                 /* parsing failed because of errors */
1069                                 fprintf(stderr, "%u error(s), %u warning(s)\n", error_count,
1070                                         warning_count);
1071                                 result = EXIT_FAILURE;
1072                                 continue;
1073                         } else if(warning_count > 0) {
1074                                 fprintf(stderr, "%u warning(s)\n", warning_count);
1075                         }
1076
1077                         if(mode == BenchmarkParser) {
1078                                 return result;
1079                         } else if(mode == PrintFluffy) {
1080                                 write_fluffy_decls(out, unit);
1081                                 continue;
1082                         } else if (mode == PrintCaml) {
1083                                 write_caml_decls(out, unit);
1084                                 continue;
1085                         }
1086
1087                         translation_unit_to_firm(unit);
1088
1089                         if (mode == ParseOnly) {
1090                                 continue;
1091                         }
1092
1093                         if (mode == CompileDump) {
1094                                 /* find irg */
1095                                 ident    *id     = new_id_from_str(dumpfunction);
1096                                 ir_graph *irg    = NULL;
1097                                 int       n_irgs = get_irp_n_irgs();
1098                                 for(int i = 0; i < n_irgs; ++i) {
1099                                         ir_graph *tirg   = get_irp_irg(i);
1100                                         ident    *irg_id = get_entity_ident(get_irg_entity(tirg));
1101                                         if(irg_id == id) {
1102                                                 irg = tirg;
1103                                                 break;
1104                                         }
1105                                 }
1106
1107                                 if(irg == NULL) {
1108                                         fprintf(stderr, "No graph for function '%s' found\n",
1109                                                 dumpfunction);
1110                                         exit(1);
1111                                 }
1112
1113                                 dump_ir_block_graph_file(irg, out);
1114                                 fclose(out);
1115                                 exit(0);
1116                         }
1117
1118                         gen_firm_finish(asm_out, filename, /*c_mode=*/1,
1119                                         /*firm_const_exists=*/0);
1120                         if (asm_out != out) {
1121                                 fclose(asm_out);
1122                         }
1123
1124                 } else if (filetype == FILETYPE_PREPROCESSED_ASSEMBLER) {
1125                         copy_file(asm_out, in);
1126                         if (in == preprocessed_in) {
1127                                 int pp_result = pclose(preprocessed_in);
1128                                 if (pp_result != EXIT_SUCCESS) {
1129                                         return pp_result;
1130                                 }
1131                         }
1132                         if(asm_out != out) {
1133                                 fclose(asm_out);
1134                         }
1135                 }
1136
1137                 if (mode == Compile)
1138                         continue;
1139
1140                 /* if we're here then we have preprocessed assembly */
1141                 filename = asm_tempfile;
1142                 filetype = FILETYPE_PREPROCESSED_ASSEMBLER;
1143
1144                 /* assemble */
1145                 if (filetype == FILETYPE_PREPROCESSED_ASSEMBLER) {
1146                         char        temp[1024];
1147                         const char *filename_o;
1148                         if(mode == CompileAssemble) {
1149                                 fclose(out);
1150                                 filename_o = outname;
1151                         } else {
1152                                 FILE *tempf = make_temp_file(temp, sizeof(temp), "cco");
1153                                 fclose(tempf);
1154                                 filename_o = temp;
1155                         }
1156
1157                         assemble(filename_o, filename);
1158
1159                         size_t len = strlen(filename_o) + 1;
1160                         filename = obstack_copy(&file_obst, filename_o, len);
1161                         filetype = FILETYPE_OBJECT;
1162                 }
1163
1164                 /* ok we're done here, process next file */
1165                 file->name = filename;
1166                 file->type = filetype;
1167         }
1168
1169         if (result != EXIT_SUCCESS)
1170                 return result;
1171
1172         /* link program file */
1173         if(mode == CompileAssembleLink) {
1174                 obstack_1grow(&ldflags_obst, '\0');
1175                 const char *flags = obstack_finish(&ldflags_obst);
1176
1177                 /* construct commandline */
1178                 obstack_printf(&file_obst, "%s", LINKER);
1179                 for (file_list_entry_t *entry = files; entry != NULL;
1180                                 entry = entry->next) {
1181                         if (entry->type != FILETYPE_OBJECT)
1182                                 continue;
1183
1184                         add_flag(&file_obst, "%s", entry->name);
1185                 }
1186
1187                 add_flag(&file_obst, "-o");
1188                 add_flag(&file_obst, outname);
1189                 obstack_printf(&file_obst, "%s", flags);
1190                 obstack_1grow(&file_obst, '\0');
1191
1192                 char *commandline = obstack_finish(&file_obst);
1193
1194                 if(verbose) {
1195                         puts(commandline);
1196                 }
1197                 int err = system(commandline);
1198                 if(err != EXIT_SUCCESS) {
1199                         fprintf(stderr, "linker reported an error\n");
1200                         exit(1);
1201                 }
1202         }
1203
1204         obstack_free(&cppflags_obst, NULL);
1205         obstack_free(&ldflags_obst, NULL);
1206         obstack_free(&file_obst, NULL);
1207
1208         exit_ast2firm();
1209         exit_parser();
1210         exit_ast();
1211         exit_lexer();
1212         exit_typehash();
1213         exit_types();
1214         exit_tokens();
1215         exit_symbol_table();
1216         return 0;
1217 }