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