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 /** allow dollar signs in symbols */
 110 extern bool allow_dollar_in_symbols;
 111
 112 /* to switch on printing of implicit casts */
 113 extern bool print_implicit_casts;
 114
 115 /* to switch on printing of parenthesis to indicate operator precedence */
 116 extern bool print_parenthesis;
 117
 118 static int            verbose;
 119 static struct obstack cppflags_obst, ldflags_obst;
 120
 121 typedef struct file_list_entry_t file_list_entry_t;
 122
 123 typedef enum filetype_t {
 124         FILETYPE_AUTODETECT,
 125         FILETYPE_C,
 126         FILETYPE_PREPROCESSED_C,
 127         FILETYPE_ASSEMBLER,
 128         FILETYPE_PREPROCESSED_ASSEMBLER,
 129         FILETYPE_OBJECT,
 130         FILETYPE_UNKNOWN
 131 } filetype_t;
 132
 133 struct file_list_entry_t {
 134         const char        *name; /**< filename or NULL for stdin */
 135         filetype_t         type;
 136         file_list_entry_t *next;
 137 };
 138
 139 #if defined(_DEBUG) || defined(FIRM_DEBUG)
 140 /**
 141  * Debug printf implementation.
 142  *
 143  * @param fmt  printf style format parameter
 144  */
 145 void dbg_printf(const char *fmt, ...)
 146 {
 147         va_list list;
 148
 149         if (firm_dump.debug_print) {
 150                 va_start(list, fmt);
 151                 vprintf(fmt, list);
 152                 va_end(list);
 153         }  /* if */
 154 }
 155 #endif /* defined(_DEBUG) || defined(FIRM_DEBUG) */
 156
 157 static void initialize_firm(void)
 158 {
 159         firm_early_init();
 160
 161         dump_consts_local(1);
 162         dump_keepalive_edges(1);
 163 }
 164
 165 static void get_output_name(char *buf, size_t buflen, const char *inputname,
 166                             const char *newext)
 167 {
 168         size_t last_dot = 0xffffffff;
 169         size_t i = 0;
 170
 171         if(inputname == NULL) {
 172                 snprintf(buf, buflen, "a%s", newext);
 173                 return;
 174         }
 175
 176         for(const char *c = inputname; *c != 0; ++c) {
 177                 if(*c == '.')
 178                         last_dot = i;
 179                 ++i;
 180         }
 181         if(last_dot == 0xffffffff)
 182                 last_dot = i;
 183
 184         if(last_dot >= buflen)
 185                 panic("filename too long");
 186         memcpy(buf, inputname, last_dot);
 187
 188         size_t extlen = strlen(newext) + 1;
 189         if(extlen + last_dot >= buflen)
 190                 panic("filename too long");
 191         memcpy(buf+last_dot, newext, extlen);
 192 }
 193
 194 #include "builtins.h"
 195
 196 static translation_unit_t *do_parsing(FILE *const in, const char *const input_name)
 197 {
 198         start_parsing();
 199
 200         if (use_builtins) {
 201                 lexer_open_buffer(builtins, sizeof(builtins)-1, "<builtin>");
 202                 parse();
 203         }
 204
 205         lexer_open_stream(in, input_name);
 206         parse();
 207
 208         translation_unit_t *unit = finish_parsing();
 209         return unit;
 210 }
 211
 212 static void lextest(FILE *in, const char *fname)
 213 {
 214         lexer_open_stream(in, fname);
 215
 216         do {
 217                 lexer_next_preprocessing_token();
 218                 print_token(stdout, &lexer_token);
 219                 puts("");
 220         } while(lexer_token.type != T_EOF);
 221 }
 222
 223 static void add_flag(struct obstack *obst, const char *format, ...)
 224 {
 225         va_list ap;
 226         va_start(ap, format);
 227
 228         char buf[4096];
 229         vsnprintf(buf, sizeof(buf), format, ap);
 230
 231         /* escape stuff... */
 232         obstack_1grow(obst, ' ');
 233         for (char *c = buf; *c != '\0'; ++c) {
 234                 switch(*c) {
 235                 case '"':
 236                 case '\'':
 237                 case '`':
 238                 case ' ':
 239                 case '\t':
 240                 case '\n':
 241                 case '\r':
 242                 case '\\':
 243                 case '$':
 244                 case '(':
 245                 case ')':
 246                         obstack_1grow(obst, '\\');
 247                         /* fallthrough */
 248                 default:
 249                         obstack_1grow(obst, *c);
 250                         break;
 251                 }
 252         }
 253
 254         va_end(ap);
 255 }
 256
 257 static FILE *preprocess(const char *fname)
 258 {
 259         char buf[4096];
 260         obstack_1grow(&cppflags_obst, '\0');
 261         const char *flags = obstack_finish(&cppflags_obst);
 262
 263         snprintf(buf, sizeof(buf), PREPROCESSOR " %s %s", flags, fname);
 264         if(verbose) {
 265                 puts(buf);
 266         }
 267
 268         FILE *f = popen(buf, "r");
 269         if(f == NULL) {
 270                 fprintf(stderr, "invoking preprocessor failed\n");
 271                 exit(1);
 272         }
 273         return f;
 274 }
 275
 276 static void assemble(const char *out, const char *in)
 277 {
 278         char buf[4096];
 279
 280         snprintf(buf, sizeof(buf), "%s %s -o %s", ASSEMBLER, in, out);
 281         if(verbose) {
 282                 puts(buf);
 283         }
 284
 285         int err = system(buf);
 286         if(err != 0) {
 287                 fprintf(stderr, "assembler reported an error\n");
 288                 exit(1);
 289         }
 290 }
 291
 292 static const char *try_dir(const char *dir)
 293 {
 294         if(dir == NULL)
 295                 return dir;
 296         if(access(dir, R_OK | W_OK | X_OK) == 0)
 297                 return dir;
 298         return NULL;
 299 }
 300
 301 static const char *get_tempdir(void)
 302 {
 303         static const char *tmpdir = NULL;
 304
 305         if(tmpdir != NULL)
 306                 return tmpdir;
 307
 308         if(tmpdir == NULL)
 309                 tmpdir = try_dir(getenv("TMPDIR"));
 310         if(tmpdir == NULL)
 311                 tmpdir = try_dir(getenv("TMP"));
 312         if(tmpdir == NULL)
 313                 tmpdir = try_dir(getenv("TEMP"));
 314
 315 #ifdef P_tmpdir
 316         if(tmpdir == NULL)
 317                 tmpdir = try_dir(P_tmpdir);
 318 #endif
 319
 320         if(tmpdir == NULL)
 321                 tmpdir = try_dir("/var/tmp");
 322         if(tmpdir == NULL)
 323                 tmpdir = try_dir("/usr/tmp");
 324         if(tmpdir == NULL)
 325                 tmpdir = try_dir("/tmp");
 326
 327         if(tmpdir == NULL)
 328                 tmpdir = ".";
 329
 330         return tmpdir;
 331 }
 332
 333 #ifndef HAVE_MKSTEMP
 334 /* cheap and nasty mkstemp replacement */
 335 static int mkstemp(char *templ)
 336 {
 337         mktemp(templ);
 338         return open(templ, O_RDWR|O_CREAT|O_EXCL|O_BINARY, 0600);
 339 }
 340 #endif
 341
 342 /**
 343  * an own version of tmpnam, which: writes in a buffer, emits no warnings
 344  * during linking (like glibc/gnu ld do for tmpnam)...
 345  */
 346 static FILE *make_temp_file(char *buffer, size_t buflen, const char *prefix)
 347 {
 348         const char *tempdir = get_tempdir();
 349
 350         snprintf(buffer, buflen, "%s/%sXXXXXX", tempdir, prefix);
 351
 352         int fd = mkstemp(buffer);
 353         if(fd == -1) {
 354                 fprintf(stderr, "couldn't create temporary file: %s\n",
 355                         strerror(errno));
 356                 exit(1);
 357         }
 358         FILE *out = fdopen(fd, "w");
 359         if(out == NULL) {
 360                 fprintf(stderr, "couldn't create temporary file FILE*\n");
 361                 exit(1);
 362         }
 363
 364         return out;
 365 }
 366
 367 /**
 368  * Do the necessary lowering for compound parameters.
 369  */
 370 void lower_compound_params(void)
 371 {
 372         lower_params_t params;
 373
 374         params.def_ptr_alignment    = 4;
 375         params.flags                = LF_COMPOUND_RETURN | LF_RETURN_HIDDEN;
 376         params.hidden_params        = ADD_HIDDEN_ALWAYS_IN_FRONT;
 377         params.find_pointer_type    = NULL;
 378         params.ret_compound_in_regs = NULL;
 379         lower_calls_with_compounds(&params);
 380 }
 381
 382 typedef enum compile_mode_t {
 383         BenchmarkParser,
 384         PreprocessOnly,
 385         ParseOnly,
 386         Compile,
 387         CompileDump,
 388         CompileAssemble,
 389         CompileAssembleLink,
 390         LexTest,
 391         PrintAst,
 392         PrintFluffy,
 393         PrintCaml
 394 } compile_mode_t;
 395
 396 static void usage(const char *argv0)
 397 {
 398         fprintf(stderr, "Usage %s input [-o output] [-c]\n", argv0);
 399 }
 400
 401 static void print_cparser_version(void) {
 402         firm_version_t ver;
 403         firm_get_version(&ver);
 404
 405         printf("cparser (%s) using libFirm (%u.%u",
 406                 cparser_REVISION, ver.major, ver.minor);
 407         if(ver.revision[0] != 0) {
 408                 putchar(' ');
 409                 fputs(ver.revision, stdout);
 410         }
 411         if(ver.build[0] != 0) {
 412                 putchar(' ');
 413                 fputs(ver.build, stdout);
 414         }
 415         puts(")\n");
 416 }
 417
 418 static void set_be_option(const char *arg)
 419 {
 420         int res = firm_be_option(arg);
 421         (void) res;
 422         assert(res);
 423 }
 424
 425 static void set_option(const char *arg)
 426 {
 427         int res = firm_option(arg);
 428         (void) res;
 429         assert(res);
 430 }
 431
 432 static void copy_file(FILE *dest, FILE *input)
 433 {
 434         char buf[16384];
 435
 436         while (!feof(input) && !ferror(dest)) {
 437                 size_t read = fread(buf, 1, sizeof(buf), input);
 438                 if(fwrite(buf, 1, read, dest) != read) {
 439                         perror("couldn't write output");
 440                 }
 441         }
 442 }
 443
 444 static FILE *open_file(const char *filename)
 445 {
 446         if (strcmp(filename, "-") == 0) {
 447                 return stdin;
 448         }
 449
 450         FILE *in = fopen(filename, "r");
 451         if(in == NULL) {
 452                 fprintf(stderr, "Couldn't open '%s': %s\n", filename,
 453                                 strerror(errno));
 454                 exit(1);
 455         }
 456
 457         return in;
 458 }
 459
 460 static filetype_t get_filetype_from_string(const char *string)
 461 {
 462         if (strcmp(string, "c") == 0 || strcmp(string, "c-header") == 0)
 463                 return FILETYPE_C;
 464         if (strcmp(string, "assembler") == 0)
 465                 return FILETYPE_PREPROCESSED_ASSEMBLER;
 466         if (strcmp(string, "assembler-with-cpp") == 0)
 467                 return FILETYPE_ASSEMBLER;
 468         if (strcmp(string, "none") == 0)
 469                 return FILETYPE_AUTODETECT;
 470
 471         return FILETYPE_UNKNOWN;
 472 }
 473
 474 int main(int argc, char **argv)
 475 {
 476         initialize_firm();
 477
 478         const char        *outname      = NULL;
 479         const char        *dumpfunction = NULL;
 480         compile_mode_t     mode         = CompileAssembleLink;
 481         int                opt_level    = 1;
 482         int                result       = EXIT_SUCCESS;
 483         char               cpu_arch[16] = "ia32";
 484         file_list_entry_t *files        = NULL;
 485         file_list_entry_t *last_file    = NULL;
 486         struct obstack     file_obst;
 487
 488         obstack_init(&cppflags_obst);
 489         obstack_init(&ldflags_obst);
 490         obstack_init(&file_obst);
 491
 492 #define GET_ARG_AFTER(def, args)                                             \
 493         def = &arg[sizeof(args)-1];                                              \
 494         if(def[0] == '\0') {                                                     \
 495                 ++i;                                                                 \
 496                 if(i >= argc) {                                                      \
 497                         fprintf(stderr, "error: expected argument after '" args "'\n");  \
 498                         argument_errors = true;                                          \
 499                         break;                                                           \
 500                 }                                                                    \
 501                 def = argv[i];                                                       \
 502                 if(def[0] == '-' && def[1] != '\0') {                                \
 503                         fprintf(stderr, "error: expected argument after '" args "'\n");  \
 504                         argument_errors = true;                                          \
 505                         continue;                                                        \
 506                 }                                                                    \
 507         }
 508
 509 #define SINGLE_OPTION(ch) (option[0] == (ch) && option[1] == '\0')
 510
 511         /* early options parsing (find out optimisation level) */
 512         for(int i = 1; i < argc; ++i) {
 513                 const char *arg = argv[i];
 514                 if(arg[0] != '-')
 515                         continue;
 516
 517                 const char *option = &arg[1];
 518                 if(option[0] == 'O') {
 519                         sscanf(&option[1], "%d", &opt_level);
 520                 }
 521         }
 522
 523         /* apply optimisation level */
 524         switch(opt_level) {
 525         case 0:
 526                 set_option("no-opt");
 527                 break;
 528         case 1:
 529                 set_option("no-inline");
 530                 break;
 531         default:
 532         case 4:
 533                 set_option("strict-aliasing");
 534                 /* fallthrough */
 535         case 3:
 536                 set_option("cond-eval");
 537                 set_option("if-conv");
 538                 use_builtins = true;
 539                 /* fallthrough */
 540         case 2:
 541                 set_option("inline");
 542                 set_option("deconv");
 543                 set_be_option("omitfp");
 544                 break;
 545         }
 546
 547         /* parse rest of options */
 548         filetype_t  forced_filetype = FILETYPE_AUTODETECT;
 549         bool        help_displayed  = false;
 550         bool        argument_errors = false;
 551         for(int i = 1; i < argc; ++i) {
 552                 const char *arg = argv[i];
 553                 if(arg[0] == '-' && arg[1] != 0) {
 554                         /* an option */
 555                         const char *option = &arg[1];
 556                         if(option[0] == 'o') {
 557                                 GET_ARG_AFTER(outname, "-o");
 558                         } else if(option[0] == 'g') {
 559                                 set_be_option("debuginfo=stabs");
 560                                 set_be_option("omitfp=no");
 561                                 set_be_option("ia32-nooptcc=yes");
 562                         } else if(SINGLE_OPTION('c')) {
 563                                 mode = CompileAssemble;
 564                         } else if(SINGLE_OPTION('E')) {
 565                                 mode = PreprocessOnly;
 566                         } else if(SINGLE_OPTION('S')) {
 567                                 mode = Compile;
 568                         } else if(option[0] == 'O') {
 569                                 continue;
 570                         } else if(option[0] == 'I') {
 571                                 const char *opt;
 572                                 GET_ARG_AFTER(opt, "-I");
 573                                 add_flag(&cppflags_obst, "-I%s", opt);
 574                         } else if(option[0] == 'D') {
 575                                 const char *opt;
 576                                 GET_ARG_AFTER(opt, "-D");
 577                                 add_flag(&cppflags_obst, "-D%s", opt);
 578                         } else if(option[0] == 'U') {
 579                                 const char *opt;
 580                                 GET_ARG_AFTER(opt, "-U");
 581                                 add_flag(&cppflags_obst, "-U%s", opt);
 582                         } else if(option[0] == 'l') {
 583                                 const char *opt;
 584                                 GET_ARG_AFTER(opt, "-l");
 585                                 add_flag(&ldflags_obst, "-l%s", opt);
 586                         } else if(option[0] == 'L') {
 587                                 const char *opt;
 588                                 GET_ARG_AFTER(opt, "-L");
 589                                 add_flag(&ldflags_obst, "-L%s", opt);
 590                         } else if(SINGLE_OPTION('v')) {
 591                                 verbose = 1;
 592                         } else if(SINGLE_OPTION('w')) {
 593                                 inhibit_all_warnings = true;
 594                         } else if(option[0] == 'x') {
 595                                 const char *opt;
 596                                 GET_ARG_AFTER(opt, "-x");
 597                                 forced_filetype = get_filetype_from_string(opt);
 598                                 if (forced_filetype == FILETYPE_UNKNOWN) {
 599                                         fprintf(stderr, "Unknown language '%s'\n", opt);
 600                                         argument_errors = true;
 601                                 }
 602                         } else if(strcmp(option, "M") == 0) {
 603                                 mode = PreprocessOnly;
 604                                 add_flag(&cppflags_obst, "-M");
 605                         } else if (strcmp(option, "MMD") == 0 ||
 606                                    strcmp(option, "MD")  == 0 ||
 607                                    strcmp(option, "MM")  == 0 ||
 608                                    strcmp(option, "MP")  == 0) {
 609                                 add_flag(&cppflags_obst, "-%s", option);
 610                         } else if(strcmp(option, "MT") == 0
 611                                         || strcmp(option, "MQ") == 0
 612                                         || strcmp(option, "MF") == 0) {
 613                                 const char *opt;
 614                                 GET_ARG_AFTER(opt, "-MT");
 615                                 add_flag(&cppflags_obst, "-%s", option);
 616                                 add_flag(&cppflags_obst, "%s", opt);
 617                         } else if(strcmp(option, "pipe") == 0) {
 618                                 /* here for gcc compatibility */
 619                         } else if(option[0] == 'f') {
 620                                 const char *opt;
 621                                 GET_ARG_AFTER(opt, "-f");
 622
 623                                 if(strcmp(opt, "syntax-only") == 0) {
 624                                         mode = ParseOnly;
 625                                 } else if(strcmp(opt, "omit-frame-pointer") == 0) {
 626                                         set_be_option("omitfp");
 627                                 } else if(strcmp(opt, "no-omit-frame-pointer") == 0) {
 628                                         set_be_option("omitfp=no");
 629                                 } else if(strcmp(opt, "strength-reduce") == 0) {
 630                                         firm_option("strength-red");
 631                                 } else if(strcmp(opt, "fast-math") == 0
 632                                                 || strcmp(opt, "unroll-loops") == 0
 633                                                 || strcmp(opt, "expensive-optimizations") == 0
 634                                                 || strcmp(opt, "no-common") == 0
 635                                                 || strcmp(opt, "PIC") == 0
 636                                                 || strncmp(opt, "align-loops=", sizeof("align-loops=")-1) == 0
 637                                                 || strncmp(opt, "align-jumps=", sizeof("align-jumps=")-1) == 0
 638                                                 || strncmp(opt, "align-functions=", sizeof("align-functions=")-1) == 0) {
 639                                         fprintf(stderr, "ignoring gcc option '-f %s'\n", opt);
 640                                 } else {
 641                                         int res = firm_option(opt);
 642                                         if (res == 0) {
 643                                                 fprintf(stderr, "error: unknown Firm option '-f %s'\n",
 644                                                         opt);
 645                                                 argument_errors = true;
 646                                                 continue;
 647                                         } else if (res == -1) {
 648                                                 help_displayed = true;
 649                                         }
 650                                 }
 651                         } else if(option[0] == 'b') {
 652                                 const char *opt;
 653                                 GET_ARG_AFTER(opt, "-b");
 654                                 int res = firm_be_option(opt);
 655                                 if (res == 0) {
 656                                         fprintf(stderr, "error: unknown Firm backend option '-b %s'\n",
 657                                                 opt);
 658                                         argument_errors = true;
 659                                 } else if (res == -1) {
 660                                         help_displayed = true;
 661                                 } else {
 662                                         if (strncmp(opt, "isa=", 4) == 0)
 663                                                 strncpy(cpu_arch, opt, sizeof(cpu_arch));
 664                                 }
 665                         } else if(option[0] == 'W') {
 666                                 if(strncmp(option + 1, "l,", 2) == 0)   // a gcc-style linker option
 667                                 {
 668                                         const char *opt;
 669                                         GET_ARG_AFTER(opt, "-Wl,");
 670                                         add_flag(&ldflags_obst, "-Wl,%s", opt);
 671                                 }
 672                                 else set_warning_opt(&option[1]);
 673                         } else if(option[0] == 'm') {
 674                                 /* -m options */
 675                                 const char *opt;
 676                                 char arch_opt[64];
 677
 678                                 GET_ARG_AFTER(opt, "-m");
 679                                 if(strncmp(opt, "arch=", 5) == 0) {
 680                                         GET_ARG_AFTER(opt, "-march=");
 681                                         snprintf(arch_opt, sizeof(arch_opt), "%s-arch=%s", cpu_arch, opt);
 682                                         int res = firm_be_option(arch_opt);
 683                                         if (res == 0)
 684                                                 argument_errors = true;
 685                                         else {
 686                                                 snprintf(arch_opt, sizeof(arch_opt), "%s-opt=%s", cpu_arch, opt);
 687                                                 int res = firm_be_option(arch_opt);
 688                                                 if (res == 0)
 689                                                         argument_errors = true;
 690                                         }
 691                                 } else if(strncmp(opt, "tune=", 5) == 0) {
 692                                         GET_ARG_AFTER(opt, "-mtune=");
 693                                         snprintf(arch_opt, sizeof(arch_opt), "%s-opt=%s", cpu_arch, opt);
 694                                         int res = firm_be_option(arch_opt);
 695                                         if (res == 0)
 696                                                 argument_errors = true;
 697                                 } else if(strncmp(opt, "cpu=", 4) == 0) {
 698                                         GET_ARG_AFTER(opt, "-mcpu=");
 699                                         snprintf(arch_opt, sizeof(arch_opt), "%s-arch=%s", cpu_arch, opt);
 700                                         int res = firm_be_option(arch_opt);
 701                                         if (res == 0)
 702                                                 argument_errors = true;
 703                                 } else if(strncmp(opt, "fpmath=", 7) == 0) {
 704                                         GET_ARG_AFTER(opt, "-mfpmath=");
 705                                         if(strcmp(opt, "387") == 0)
 706                                                 opt = "x87";
 707                                         else if(strcmp(opt, "sse") == 0)
 708                                                 opt = "sse2";
 709                                         else {
 710                                                 fprintf(stderr, "error: option -mfpumath supports only 387 or sse\n");
 711                                                 argument_errors = true;
 712                                         }
 713                                         if(!argument_errors) {
 714                                                 snprintf(arch_opt, sizeof(arch_opt), "%s-fpunit=%s", cpu_arch, opt);
 715                                                 int res = firm_be_option(arch_opt);
 716                                                 if (res == 0)
 717                                                         argument_errors = true;
 718                                         }
 719                                 } else if(strncmp(opt, "preferred-stack-boundary=", 25) == 0) {
 720                                         GET_ARG_AFTER(opt, "-mpreferred-stack-boundary=");
 721                                         snprintf(arch_opt, sizeof(arch_opt), "%s-stackalign=%s", cpu_arch, opt);
 722                                         int res = firm_be_option(arch_opt);
 723                                         if (res == 0)
 724                                                 argument_errors = true;
 725                                 } else if(strcmp(opt, "omit-leaf-frame-pointer") == 0) {
 726                                         set_be_option("omitleaffp=1");
 727                                 } else if(strcmp(opt, "no-omit-leaf-frame-pointer") == 0) {
 728                                         set_be_option("omitleaffp=0");
 729                                 } else {
 730                                         char *endptr;
 731                                         long int value = strtol(opt, &endptr, 10);
 732                                         if (*endptr != '\0') {
 733                                                 fprintf(stderr, "error: wrong option '-m %s'\n",  opt);
 734                                                 argument_errors = true;
 735                                         }
 736                                         if (value != 16 && value != 32 && value != 64) {
 737                                                 fprintf(stderr, "error: option -m supports only 16, 32 or 64\n");
 738                                                 argument_errors = true;
 739                                         } else {
 740                                                 machine_size = (unsigned int)value;
 741                                         }
 742                                 }
 743                         } else if(strcmp(option, "pg") == 0) {
 744                                 set_be_option("gprof");
 745                                 add_flag(&ldflags_obst, "-pg");
 746                         } else if(strcmp(option, "pedantic") == 0
 747                                         || strcmp(option, "ansi") == 0) {
 748                                 fprintf(stderr, "warning: ignoring gcc option '%s'\n", arg);
 749                         } else if(strcmp(option, "shared") == 0) {
 750                                 add_flag(&ldflags_obst, "-shared");
 751                         } else if(strncmp(option, "std=", 4) == 0) {
 752                                 if(strcmp(&option[4], "c99") == 0) {
 753                                         c_mode = _C89|_C99;
 754                                 } else if(strcmp(&option[4], "c89") == 0) {
 755                                         c_mode = _C89;
 756                                 } else if(strcmp(&option[4], "gnu99") == 0) {
 757                                         c_mode = _C89|_C99|_GNUC;
 758                                 } else if(strcmp(&option[4], "microsoft") == 0) {
 759                                         c_mode = _C89|_C99|_MS;
 760                                 } else
 761                                         fprintf(stderr, "warning: ignoring gcc option '%s'\n", arg);
 762                         } else if(strcmp(option, "version") == 0) {
 763                                 print_cparser_version();
 764                         } else if (option[0] == '-') {
 765                                 /* double dash option */
 766                                 ++option;
 767                                 if(strcmp(option, "gcc") == 0) {
 768                                         c_mode |= _GNUC;
 769                                 } else if(strcmp(option, "no-gcc") == 0) {
 770                                         c_mode &= ~_GNUC;
 771                                 } else if(strcmp(option, "ms") == 0) {
 772                                         c_mode |= _MS;
 773                                 } else if(strcmp(option, "no-ms") == 0) {
 774                                         c_mode &= ~_MS;
 775                                 } else if(strcmp(option, "signed-chars") == 0) {
 776                                         char_is_signed = true;
 777                                 } else if(strcmp(option, "unsigned-chars") == 0) {
 778                                         char_is_signed = false;
 779                                 } else if(strcmp(option, "strict") == 0) {
 780                                         strict_mode = true;
 781                                 } else if(strcmp(option, "lextest") == 0) {
 782                                         mode = LexTest;
 783                                 } else if(strcmp(option, "benchmark") == 0) {
 784                                         mode = BenchmarkParser;
 785                                 } else if(strcmp(option, "print-ast") == 0) {
 786                                         mode = PrintAst;
 787                                 } else if(strcmp(option, "print-implicit-cast") == 0) {
 788                                         print_implicit_casts = true;
 789                                 } else if(strcmp(option, "print-parenthesis") == 0) {
 790                                         print_parenthesis = true;
 791                                 } else if(strcmp(option, "print-fluffy") == 0) {
 792                                         mode = PrintFluffy;
 793                                 } else if(strcmp(option, "print-caml") == 0) {
 794                                         mode = PrintCaml;
 795                                 } else if(strcmp(option, "version") == 0) {
 796                                         print_cparser_version();
 797                                         exit(EXIT_SUCCESS);
 798                                 } else if(strcmp(option, "dump-function") == 0) {
 799                                         ++i;
 800                                         if(i >= argc) {
 801                                                 fprintf(stderr, "error: "
 802                                                         "expected argument after '--dump-function'\n");
 803                                                 argument_errors = true;
 804                                                 break;
 805                                         }
 806                                         dumpfunction = argv[i];
 807                                         mode         = CompileDump;
 808                                 } else {
 809                                         fprintf(stderr, "error: unknown argument '%s'\n", arg);
 810                                         argument_errors = true;
 811                                 }
 812                         } else {
 813                                 fprintf(stderr, "error: unknown argument '%s'\n", arg);
 814                                 argument_errors = true;
 815                         }
 816                 } else {
 817                         filetype_t  type     = forced_filetype;
 818                         const char *filename = arg;
 819                         if (type == FILETYPE_AUTODETECT) {
 820                                 size_t      len      = strlen(arg);
 821                                 if (len < 2 && arg[0] == '-') {
 822                                         /* - implicitely means C source file */
 823                                         type     = FILETYPE_C;
 824                                         filename = NULL;
 825                                 } else if (len > 2 && arg[len-2] == '.') {
 826                                         switch(arg[len-1]) {
 827                                         case 'c': type = FILETYPE_C; break;
 828                                         case 'h': type = FILETYPE_C; break;
 829                                         case 's': type = FILETYPE_PREPROCESSED_ASSEMBLER; break;
 830                                         case 'S': type = FILETYPE_ASSEMBLER; break;
 831
 832                                         case 'a':
 833                                         case 'o': type = FILETYPE_OBJECT; break;
 834                                         }
 835                                 } else if (len > 3 && arg[len-3] == '.') {
 836                                         if(strcmp(arg + len - 2, "so") == 0) {
 837                                                 type = FILETYPE_OBJECT;
 838                                         }
 839                                 }
 840
 841                                 if (type == FILETYPE_AUTODETECT) {
 842                                         fprintf(stderr, "'%s': file format not recognized\n", arg);
 843                                         continue;
 844                                 }
 845                         }
 846
 847                         file_list_entry_t *entry
 848                                 = obstack_alloc(&file_obst, sizeof(entry[0]));
 849                         memset(entry, 0, sizeof(entry[0]));
 850                         entry->name = arg;
 851                         entry->type = type;
 852
 853                         if (last_file != NULL) {
 854                                 last_file->next = entry;
 855                         } else {
 856                                 files = entry;
 857                         }
 858                         last_file = entry;
 859                 }
 860         }
 861
 862         if (files == NULL) {
 863                 fprintf(stderr, "error: no input files specified\n");
 864                 argument_errors = true;
 865         }
 866
 867         if (help_displayed) {
 868                 return !argument_errors;
 869         }
 870         if (argument_errors) {
 871                 usage(argv[0]);
 872                 return 1;
 873         }
 874
 875         /* we do the lowering in ast2firm */
 876         firm_opt.lower_bitfields = FALSE;
 877
 878         gen_firm_init();
 879         init_symbol_table();
 880         init_tokens();
 881         init_types();
 882         init_typehash();
 883         init_basic_types();
 884         init_lexer(allow_dollar_in_symbols);
 885         init_ast();
 886         init_parser();
 887         init_ast2firm();
 888
 889         char outnamebuf[4096];
 890         if (outname == NULL) {
 891                 const char *filename = files->name;
 892
 893                 switch(mode) {
 894                 case BenchmarkParser:
 895                 case PrintAst:
 896                 case PrintFluffy:
 897                 case PrintCaml:
 898                 case LexTest:
 899                 case PreprocessOnly:
 900                         outname = "-";
 901                         break;
 902                 case ParseOnly:
 903                         break;
 904                 case Compile:
 905                         get_output_name(outnamebuf, sizeof(outnamebuf), filename, ".s");
 906                         outname = outnamebuf;
 907                         break;
 908                 case CompileAssemble:
 909                         get_output_name(outnamebuf, sizeof(outnamebuf), filename, ".o");
 910                         outname = outnamebuf;
 911                         break;
 912                 case CompileDump:
 913                         get_output_name(outnamebuf, sizeof(outnamebuf), dumpfunction,
 914                                         ".vcg");
 915                         outname = outnamebuf;
 916                         break;
 917                 case CompileAssembleLink:
 918 #ifdef _WIN32
 919                         outname = "a.exe";
 920 #else
 921                         outname = "a.out";
 922 #endif
 923                         break;
 924                 }
 925         }
 926
 927         assert(outname != NULL);
 928
 929         FILE *out;
 930         if(strcmp(outname, "-") == 0) {
 931                 out = stdout;
 932         } else {
 933                 out = fopen(outname, "w");
 934                 if(out == NULL) {
 935                         fprintf(stderr, "Couldn't open '%s' for writing: %s\n", outname,
 936                                         strerror(errno));
 937                         return 1;
 938                 }
 939         }
 940
 941         file_list_entry_t *file;
 942         for (file = files; file != NULL; file = file->next) {
 943                 char        asm_tempfile[1024];
 944                 const char *filename = file->name;
 945                 filetype_t  filetype = file->type;
 946
 947                 if (file->type == FILETYPE_OBJECT)
 948                         continue;
 949
 950                 FILE *in = NULL;
 951                 if (mode == LexTest) {
 952                         if (in == NULL)
 953                                 in = open_file(filename);
 954                         lextest(in, filename);
 955                         fclose(in);
 956                         exit(EXIT_SUCCESS);
 957                 }
 958
 959                 FILE *preprocessed_in = NULL;
 960                 if (filetype == FILETYPE_C || filetype == FILETYPE_ASSEMBLER) {
 961                         /* no support for input on FILE* yet */
 962                         if (in != NULL)
 963                                 panic("internal compiler error: in for preprocessor != NULL");
 964
 965                         preprocessed_in = preprocess(filename);
 966                         if (mode == PreprocessOnly) {
 967                                 copy_file(out, preprocessed_in);
 968                                 int result = pclose(preprocessed_in);
 969                                 fclose(out);
 970                                 return result;
 971                         }
 972
 973                         if (filetype == FILETYPE_C) {
 974                                 filetype = FILETYPE_PREPROCESSED_C;
 975                         } else if (filetype == FILETYPE_ASSEMBLER) {
 976                                 filetype = FILETYPE_PREPROCESSED_ASSEMBLER;
 977                         } else {
 978                                 panic("internal compiler error: unknown filetype at preproc");
 979                         }
 980
 981                         in = preprocessed_in;
 982                 }
 983
 984                 FILE *asm_out;
 985                 if(mode == Compile) {
 986                         asm_out = out;
 987                 } else {
 988                         asm_out = make_temp_file(asm_tempfile, sizeof(asm_tempfile),
 989                                                  "ccs");
 990                 }
 991
 992                 if (in == NULL)
 993                         in = open_file(filename);
 994
 995                 /* preprocess and compile */
 996                 if (filetype == FILETYPE_PREPROCESSED_C) {
 997                         translation_unit_t *const unit = do_parsing(in, filename);
 998                         if (in == preprocessed_in) {
 999                                 int pp_result = pclose(preprocessed_in);
1000                                 if (pp_result != EXIT_SUCCESS) {
1001                                         exit(EXIT_FAILURE);
1002                                 }
1003                         }
1004
1005                         /* prints the AST even if errors occurred */
1006                         if (mode == PrintAst) {
1007                                 type_set_output(out);
1008                                 ast_set_output(out);
1009                                 print_ast(unit);
1010                         }
1011
1012                         if(error_count > 0) {
1013                                 /* parsing failed because of errors */
1014                                 fprintf(stderr, "%u error(s), %u warning(s)\n", error_count,
1015                                         warning_count);
1016                                 result = EXIT_FAILURE;
1017                                 continue;
1018                         } else if(warning_count > 0) {
1019                                 fprintf(stderr, "%u warning(s)\n", warning_count);
1020                         }
1021
1022                         if(mode == BenchmarkParser) {
1023                                 return result;
1024                         } else if(mode == PrintFluffy) {
1025                                 write_fluffy_decls(out, unit);
1026                                 continue;
1027                         } else if (mode == PrintCaml) {
1028                                 write_caml_decls(out, unit);
1029                                 continue;
1030                         }
1031
1032                         translation_unit_to_firm(unit);
1033
1034                         if (mode == ParseOnly) {
1035                                 continue;
1036                         }
1037
1038                         if (mode == CompileDump) {
1039                                 /* find irg */
1040                                 ident    *id     = new_id_from_str(dumpfunction);
1041                                 ir_graph *irg    = NULL;
1042                                 int       n_irgs = get_irp_n_irgs();
1043                                 for(int i = 0; i < n_irgs; ++i) {
1044                                         ir_graph *tirg   = get_irp_irg(i);
1045                                         ident    *irg_id = get_entity_ident(get_irg_entity(tirg));
1046                                         if(irg_id == id) {
1047                                                 irg = tirg;
1048                                                 break;
1049                                         }
1050                                 }
1051
1052                                 if(irg == NULL) {
1053                                         fprintf(stderr, "No graph for function '%s' found\n",
1054                                                 dumpfunction);
1055                                         exit(1);
1056                                 }
1057
1058                                 dump_ir_block_graph_file(irg, out);
1059                                 fclose(out);
1060                                 exit(0);
1061                         }
1062
1063                         gen_firm_finish(asm_out, filename, /*c_mode=*/1,
1064                                         /*firm_const_exists=*/0);
1065                         if (asm_out != out) {
1066                                 fclose(asm_out);
1067                         }
1068
1069                 } else if (filetype == FILETYPE_PREPROCESSED_ASSEMBLER) {
1070                         copy_file(asm_out, in);
1071                         if (in == preprocessed_in) {
1072                                 int pp_result = pclose(preprocessed_in);
1073                                 if (pp_result != EXIT_SUCCESS) {
1074                                         return pp_result;
1075                                 }
1076                         }
1077                         if(asm_out != out) {
1078                                 fclose(asm_out);
1079                         }
1080                 }
1081
1082                 if (mode == Compile)
1083                         continue;
1084
1085                 /* if we're here then we have preprocessed assembly */
1086                 filename = asm_tempfile;
1087                 filetype = FILETYPE_PREPROCESSED_ASSEMBLER;
1088
1089                 /* assemble */
1090                 if (filetype == FILETYPE_PREPROCESSED_ASSEMBLER) {
1091                         char        temp[1024];
1092                         const char *filename_o;
1093                         if(mode == CompileAssemble) {
1094                                 fclose(out);
1095                                 filename_o = outname;
1096                         } else {
1097                                 FILE *tempf = make_temp_file(temp, sizeof(temp), "cco");
1098                                 fclose(tempf);
1099                                 filename_o = temp;
1100                         }
1101
1102                         assemble(filename_o, filename);
1103
1104                         size_t len = strlen(filename_o) + 1;
1105                         filename = obstack_copy(&file_obst, filename_o, len);
1106                         filetype = FILETYPE_OBJECT;
1107                 }
1108
1109                 /* ok we're done here, process next file */
1110                 file->name = filename;
1111                 file->type = filetype;
1112         }
1113
1114         if (result != EXIT_SUCCESS)
1115                 return result;
1116
1117         /* link program file */
1118         if(mode == CompileAssembleLink) {
1119                 obstack_1grow(&ldflags_obst, '\0');
1120                 const char *flags = obstack_finish(&ldflags_obst);
1121
1122                 /* construct commandline */
1123                 obstack_printf(&file_obst, "%s", LINKER);
1124                 for (file_list_entry_t *entry = files; entry != NULL;
1125                                 entry = entry->next) {
1126                         if (entry->type != FILETYPE_OBJECT)
1127                                 continue;
1128
1129                         add_flag(&file_obst, "%s", entry->name);
1130                 }
1131
1132                 add_flag(&file_obst, "-o");
1133                 add_flag(&file_obst, outname);
1134                 obstack_printf(&file_obst, "%s", flags);
1135                 obstack_1grow(&file_obst, '\0');
1136
1137                 char *commandline = obstack_finish(&file_obst);
1138
1139                 if(verbose) {
1140                         puts(commandline);
1141                 }
1142                 int err = system(commandline);
1143                 if(err != EXIT_SUCCESS) {
1144                         fprintf(stderr, "linker reported an error\n");
1145                         exit(1);
1146                 }
1147         }
1148
1149         obstack_free(&cppflags_obst, NULL);
1150         obstack_free(&ldflags_obst, NULL);
1151         obstack_free(&file_obst, NULL);
1152
1153         exit_ast2firm();
1154         exit_parser();
1155         exit_ast();
1156         exit_lexer();
1157         exit_typehash();
1158         exit_types();
1159         exit_tokens();
1160         exit_symbol_table();
1161         return 0;
1162 }