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