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