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 #ifdef __APPLE__
  84 #define PREPROCESSOR "gcc -E -std=c99 -U__WCHAR_TYPE__ -D__WCHAR_TYPE__=int -U__SIZE_TYPE__ -D__SIZE_TYPE__=unsigned\\ long -m32 -U__STRICT_ANSI__"
  85 #else
  86 #define PREPROCESSOR "cpp -std=c99 -U__WCHAR_TYPE__ -D__WCHAR_TYPE__=int -U__SIZE_TYPE__ -D__SIZE_TYPE__=unsigned\\ long -m32 -U__STRICT_ANSI__"
  87 #endif
  88 #endif
  89
  90 #ifndef LINKER
  91 #define LINKER    "gcc -m32"
  92 #endif
  93
  94 #ifndef ASSEMBLER
  95 #ifdef __APPLE__
  96 #define ASSEMBLER "gcc -c -xassembler"
  97 #else
  98 #define ASSEMBLER "as --32"
  99 #endif
 100 #endif
 101
 102 /** The current c mode/dialect. */
 103 unsigned int c_mode = _C89|_C99|_GNUC;
 104
 105 /** The 'machine size', 16, 32 or 64 bit, 32bit is the default. */
 106 unsigned int machine_size = 32;
 107
 108 /** true if the char type is signed. */
 109 bool char_is_signed = true;
 110
 111 /** true for strict language checking. */
 112 bool strict_mode = false;
 113
 114 /** use builtins for some libc functions */
 115 bool use_builtins = false;
 116
 117 /** we have extern function with const attribute. */
 118 bool have_const_functions = false;
 119
 120 /* to switch on printing of implicit casts */
 121 extern bool print_implicit_casts;
 122
 123 /* to switch on printing of parenthesis to indicate operator precedence */
 124 extern bool print_parenthesis;
 125
 126 static int             verbose;
 127 static struct obstack  cppflags_obst, ldflags_obst;
 128 static char            dep_target[1024];
 129 static const char     *outname;
 130
 131 typedef struct file_list_entry_t file_list_entry_t;
 132
 133 typedef enum filetype_t {
 134         FILETYPE_AUTODETECT,
 135         FILETYPE_C,
 136         FILETYPE_PREPROCESSED_C,
 137         FILETYPE_ASSEMBLER,
 138         FILETYPE_PREPROCESSED_ASSEMBLER,
 139         FILETYPE_OBJECT,
 140         FILETYPE_UNKNOWN
 141 } filetype_t;
 142
 143 struct file_list_entry_t {
 144         const char        *name; /**< filename or NULL for stdin */
 145         filetype_t         type;
 146         file_list_entry_t *next;
 147 };
 148
 149 #if defined(_DEBUG) || defined(FIRM_DEBUG)
 150 /**
 151  * Debug printf implementation.
 152  *
 153  * @param fmt  printf style format parameter
 154  */
 155 void dbg_printf(const char *fmt, ...)
 156 {
 157         va_list list;
 158
 159         if (firm_dump.debug_print) {
 160                 va_start(list, fmt);
 161                 vprintf(fmt, list);
 162                 va_end(list);
 163         }  /* if */
 164 }
 165 #endif /* defined(_DEBUG) || defined(FIRM_DEBUG) */
 166
 167 static void initialize_firm(void)
 168 {
 169         firm_early_init();
 170
 171         dump_consts_local(1);
 172         dump_keepalive_edges(1);
 173 }
 174
 175 static void get_output_name(char *buf, size_t buflen, const char *inputname,
 176                             const char *newext)
 177 {
 178         size_t last_dot = 0xffffffff;
 179         size_t i = 0;
 180
 181         if(inputname == NULL) {
 182                 snprintf(buf, buflen, "a%s", newext);
 183                 return;
 184         }
 185
 186         for(const char *c = inputname; *c != 0; ++c) {
 187                 if(*c == '.')
 188                         last_dot = i;
 189                 ++i;
 190         }
 191         if(last_dot == 0xffffffff)
 192                 last_dot = i;
 193
 194         if(last_dot >= buflen)
 195                 panic("filename too long");
 196         memcpy(buf, inputname, last_dot);
 197
 198         size_t extlen = strlen(newext) + 1;
 199         if(extlen + last_dot >= buflen)
 200                 panic("filename too long");
 201         memcpy(buf+last_dot, newext, extlen);
 202 }
 203
 204 #include "builtins.h"
 205
 206 static translation_unit_t *do_parsing(FILE *const in, const char *const input_name)
 207 {
 208         start_parsing();
 209
 210         if (use_builtins) {
 211                 lexer_open_buffer(builtins, sizeof(builtins)-1, "<builtin>");
 212                 parse();
 213         }
 214
 215         lexer_open_stream(in, input_name);
 216         parse();
 217
 218         translation_unit_t *unit = finish_parsing();
 219         return unit;
 220 }
 221
 222 static void lextest(FILE *in, const char *fname)
 223 {
 224         lexer_open_stream(in, fname);
 225
 226         do {
 227                 lexer_next_preprocessing_token();
 228                 print_token(stdout, &lexer_token);
 229                 puts("");
 230         } while(lexer_token.type != T_EOF);
 231 }
 232
 233 static void add_flag(struct obstack *obst, const char *format, ...)
 234 {
 235         va_list ap;
 236         va_start(ap, format);
 237
 238         char buf[4096];
 239         vsnprintf(buf, sizeof(buf), format, ap);
 240
 241         /* escape stuff... */
 242         obstack_1grow(obst, ' ');
 243         for (char *c = buf; *c != '\0'; ++c) {
 244                 switch(*c) {
 245                 case '"':
 246                 case '\'':
 247                 case '`':
 248                 case ' ':
 249                 case '\t':
 250                 case '\n':
 251                 case '\r':
 252                 case '\\':
 253                 case '$':
 254                 case '(':
 255                 case ')':
 256                         obstack_1grow(obst, '\\');
 257                         /* fallthrough */
 258                 default:
 259                         obstack_1grow(obst, *c);
 260                         break;
 261                 }
 262         }
 263
 264         va_end(ap);
 265 }
 266
 267 static FILE *preprocess(const char *fname)
 268 {
 269         obstack_1grow(&cppflags_obst, '\0');
 270         const char *flags = obstack_finish(&cppflags_obst);
 271
 272         obstack_printf(&cppflags_obst, "%s", PREPROCESSOR);
 273         if (dep_target[0] != '\0') {
 274                 add_flag(&cppflags_obst, "-MF");
 275                 add_flag(&cppflags_obst, "%s", dep_target);
 276                 if (outname != NULL) {
 277                                 add_flag(&cppflags_obst, "-MQ");
 278                                 add_flag(&cppflags_obst, "%s", outname);
 279                 }
 280         }
 281         if (flags[0] != '\0') {
 282                 obstack_printf(&cppflags_obst, " %s", flags);
 283         }
 284         add_flag(&cppflags_obst, "%s", fname);
 285
 286         obstack_1grow(&cppflags_obst, '\0');
 287         const char *buf = obstack_finish(&cppflags_obst);
 288         if(verbose) {
 289                 puts(buf);
 290         }
 291
 292         FILE *f = popen(buf, "r");
 293         if(f == NULL) {
 294                 fprintf(stderr, "invoking preprocessor failed\n");
 295                 exit(1);
 296         }
 297
 298         return f;
 299 }
 300
 301 static void assemble(const char *out, const char *in)
 302 {
 303         char buf[4096];
 304
 305         snprintf(buf, sizeof(buf), "%s %s -o %s", ASSEMBLER, in, out);
 306         if(verbose) {
 307                 puts(buf);
 308         }
 309
 310         int err = system(buf);
 311         if(err != 0) {
 312                 fprintf(stderr, "assembler reported an error\n");
 313                 exit(1);
 314         }
 315 }
 316
 317 static const char *try_dir(const char *dir)
 318 {
 319         if(dir == NULL)
 320                 return dir;
 321         if(access(dir, R_OK | W_OK | X_OK) == 0)
 322                 return dir;
 323         return NULL;
 324 }
 325
 326 static const char *get_tempdir(void)
 327 {
 328         static const char *tmpdir = NULL;
 329
 330         if(tmpdir != NULL)
 331                 return tmpdir;
 332
 333         if(tmpdir == NULL)
 334                 tmpdir = try_dir(getenv("TMPDIR"));
 335         if(tmpdir == NULL)
 336                 tmpdir = try_dir(getenv("TMP"));
 337         if(tmpdir == NULL)
 338                 tmpdir = try_dir(getenv("TEMP"));
 339
 340 #ifdef P_tmpdir
 341         if(tmpdir == NULL)
 342                 tmpdir = try_dir(P_tmpdir);
 343 #endif
 344
 345         if(tmpdir == NULL)
 346                 tmpdir = try_dir("/var/tmp");
 347         if(tmpdir == NULL)
 348                 tmpdir = try_dir("/usr/tmp");
 349         if(tmpdir == NULL)
 350                 tmpdir = try_dir("/tmp");
 351
 352         if(tmpdir == NULL)
 353                 tmpdir = ".";
 354
 355         return tmpdir;
 356 }
 357
 358 #ifndef HAVE_MKSTEMP
 359 /* cheap and nasty mkstemp replacement */
 360 static int mkstemp(char *templ)
 361 {
 362         mktemp(templ);
 363         return open(templ, O_RDWR|O_CREAT|O_EXCL|O_BINARY, 0600);
 364 }
 365 #endif
 366
 367 /**
 368  * an own version of tmpnam, which: writes in a buffer, emits no warnings
 369  * during linking (like glibc/gnu ld do for tmpnam)...
 370  */
 371 static FILE *make_temp_file(char *buffer, size_t buflen, const char *prefix)
 372 {
 373         const char *tempdir = get_tempdir();
 374
 375         snprintf(buffer, buflen, "%s/%sXXXXXX", tempdir, prefix);
 376
 377         int fd = mkstemp(buffer);
 378         if(fd == -1) {
 379                 fprintf(stderr, "couldn't create temporary file: %s\n",
 380                         strerror(errno));
 381                 exit(1);
 382         }
 383         FILE *out = fdopen(fd, "w");
 384         if(out == NULL) {
 385                 fprintf(stderr, "couldn't create temporary file FILE*\n");
 386                 exit(1);
 387         }
 388
 389         return out;
 390 }
 391
 392 /**
 393  * Do the necessary lowering for compound parameters.
 394  */
 395 void lower_compound_params(void)
 396 {
 397         lower_params_t params;
 398
 399         params.def_ptr_alignment    = 4;
 400         params.flags                = LF_COMPOUND_RETURN | LF_RETURN_HIDDEN;
 401         params.hidden_params        = ADD_HIDDEN_ALWAYS_IN_FRONT;
 402         params.find_pointer_type    = NULL;
 403         params.ret_compound_in_regs = NULL;
 404         lower_calls_with_compounds(&params);
 405 }
 406
 407 typedef enum compile_mode_t {
 408         BenchmarkParser,
 409         PreprocessOnly,
 410         ParseOnly,
 411         Compile,
 412         CompileDump,
 413         CompileAssemble,
 414         CompileAssembleLink,
 415         LexTest,
 416         PrintAst,
 417         PrintFluffy,
 418         PrintCaml
 419 } compile_mode_t;
 420
 421 static void usage(const char *argv0)
 422 {
 423         fprintf(stderr, "Usage %s input [-o output] [-c]\n", argv0);
 424 }
 425
 426 static void print_cparser_version(void) {
 427         firm_version_t ver;
 428         firm_get_version(&ver);
 429
 430         printf("cparser (%s) using libFirm (%u.%u",
 431                 cparser_REVISION, ver.major, ver.minor);
 432         if(ver.revision[0] != 0) {
 433                 putchar(' ');
 434                 fputs(ver.revision, stdout);
 435         }
 436         if(ver.build[0] != 0) {
 437                 putchar(' ');
 438                 fputs(ver.build, stdout);
 439         }
 440         puts(")\n");
 441 }
 442
 443 static void set_be_option(const char *arg)
 444 {
 445         int res = firm_be_option(arg);
 446         (void) res;
 447         assert(res);
 448 }
 449
 450 static void set_option(const char *arg)
 451 {
 452         int res = firm_option(arg);
 453         (void) res;
 454         assert(res);
 455 }
 456
 457 static void copy_file(FILE *dest, FILE *input)
 458 {
 459         char buf[16384];
 460
 461         while (!feof(input) && !ferror(dest)) {
 462                 size_t read = fread(buf, 1, sizeof(buf), input);
 463                 if(fwrite(buf, 1, read, dest) != read) {
 464                         perror("couldn't write output");
 465                 }
 466         }
 467 }
 468
 469 static inline bool streq(char const* a, char const* b)
 470 {
 471         return strcmp(a, b) == 0;
 472 }
 473
 474 static inline bool strstart(char const* str, char const* start)
 475 {
 476         do {
 477                 if (*start == '\0')
 478                         return true;
 479         } while (*str++ == *start++);
 480         return false;
 481 }
 482
 483 static FILE *open_file(const char *filename)
 484 {
 485         if (streq(filename, "-")) {
 486                 return stdin;
 487         }
 488
 489         FILE *in = fopen(filename, "r");
 490         if(in == NULL) {
 491                 fprintf(stderr, "Couldn't open '%s': %s\n", filename,
 492                                 strerror(errno));
 493                 exit(1);
 494         }
 495
 496         return in;
 497 }
 498
 499 static filetype_t get_filetype_from_string(const char *string)
 500 {
 501         if (streq(string, "c") || streq(string, "c-header"))
 502                 return FILETYPE_C;
 503         if (streq(string, "assembler"))
 504                 return FILETYPE_PREPROCESSED_ASSEMBLER;
 505         if (streq(string, "assembler-with-cpp"))
 506                 return FILETYPE_ASSEMBLER;
 507         if (streq(string, "none"))
 508                 return FILETYPE_AUTODETECT;
 509
 510         return FILETYPE_UNKNOWN;
 511 }
 512
 513 int main(int argc, char **argv)
 514 {
 515         initialize_firm();
 516
 517         const char        *dumpfunction         = NULL;
 518         compile_mode_t     mode                 = CompileAssembleLink;
 519         int                opt_level            = 1;
 520         int                result               = EXIT_SUCCESS;
 521         char               cpu_arch[16]         = "ia32";
 522         file_list_entry_t *files                = NULL;
 523         file_list_entry_t *last_file            = NULL;
 524         bool               construct_dep_target = false;
 525         struct obstack     file_obst;
 526
 527         obstack_init(&cppflags_obst);
 528         obstack_init(&ldflags_obst);
 529         obstack_init(&file_obst);
 530
 531 #define GET_ARG_AFTER(def, args)                                             \
 532         def = &arg[sizeof(args)-1];                                              \
 533         if(def[0] == '\0') {                                                     \
 534                 ++i;                                                                 \
 535                 if(i >= argc) {                                                      \
 536                         fprintf(stderr, "error: expected argument after '" args "'\n");  \
 537                         argument_errors = true;                                          \
 538                         break;                                                           \
 539                 }                                                                    \
 540                 def = argv[i];                                                       \
 541                 if(def[0] == '-' && def[1] != '\0') {                                \
 542                         fprintf(stderr, "error: expected argument after '" args "'\n");  \
 543                         argument_errors = true;                                          \
 544                         continue;                                                        \
 545                 }                                                                    \
 546         }
 547
 548 #define SINGLE_OPTION(ch) (option[0] == (ch) && option[1] == '\0')
 549
 550         /* early options parsing (find out optimisation level) */
 551         for(int i = 1; i < argc; ++i) {
 552                 const char *arg = argv[i];
 553                 if(arg[0] != '-')
 554                         continue;
 555
 556                 const char *option = &arg[1];
 557                 if(option[0] == 'O') {
 558                         sscanf(&option[1], "%d", &opt_level);
 559                 }
 560         }
 561
 562         /* apply optimisation level */
 563         switch(opt_level) {
 564         case 0:
 565                 set_option("no-opt");
 566                 break;
 567         case 1:
 568                 set_option("no-inline");
 569                 break;
 570         default:
 571         case 4:
 572                 set_option("strict-aliasing");
 573                 /* use_builtins = true; */
 574                 /* fallthrough */
 575         case 3:
 576                 set_option("cond-eval");
 577                 set_option("if-conv");
 578                 /* fallthrough */
 579         case 2:
 580                 set_option("inline");
 581                 set_option("deconv");
 582                 set_be_option("omitfp");
 583                 break;
 584         }
 585
 586 #ifdef __APPLE__
 587         /* Darwin expects the stack to be aligned to 16byte boundary */
 588         firm_be_option("ia32-stackalign=4");
 589 #endif
 590
 591         /* parse rest of options */
 592         filetype_t  forced_filetype = FILETYPE_AUTODETECT;
 593         bool        help_displayed  = false;
 594         bool        argument_errors = false;
 595         for(int i = 1; i < argc; ++i) {
 596                 const char *arg = argv[i];
 597                 if(arg[0] == '-' && arg[1] != 0) {
 598                         /* an option */
 599                         const char *option = &arg[1];
 600                         if(option[0] == 'o') {
 601                                 GET_ARG_AFTER(outname, "-o");
 602                         } else if(option[0] == 'g') {
 603                                 set_be_option("debuginfo=stabs");
 604                                 set_be_option("omitfp=no");
 605                                 set_be_option("ia32-nooptcc=yes");
 606                         } else if(SINGLE_OPTION('c')) {
 607                                 mode = CompileAssemble;
 608                         } else if(SINGLE_OPTION('E')) {
 609                                 mode = PreprocessOnly;
 610                         } else if(SINGLE_OPTION('S')) {
 611                                 mode = Compile;
 612                         } else if(option[0] == 'O') {
 613                                 continue;
 614                         } else if(option[0] == 'I') {
 615                                 const char *opt;
 616                                 GET_ARG_AFTER(opt, "-I");
 617                                 add_flag(&cppflags_obst, "-I%s", opt);
 618                         } else if(option[0] == 'D') {
 619                                 const char *opt;
 620                                 GET_ARG_AFTER(opt, "-D");
 621                                 add_flag(&cppflags_obst, "-D%s", opt);
 622                         } else if(option[0] == 'U') {
 623                                 const char *opt;
 624                                 GET_ARG_AFTER(opt, "-U");
 625                                 add_flag(&cppflags_obst, "-U%s", opt);
 626                         } else if(option[0] == 'l') {
 627                                 const char *opt;
 628                                 GET_ARG_AFTER(opt, "-l");
 629                                 add_flag(&ldflags_obst, "-l%s", opt);
 630                         } else if(option[0] == 'L') {
 631                                 const char *opt;
 632                                 GET_ARG_AFTER(opt, "-L");
 633                                 add_flag(&ldflags_obst, "-L%s", opt);
 634                         } else if(SINGLE_OPTION('v')) {
 635                                 verbose = 1;
 636                         } else if(SINGLE_OPTION('w')) {
 637                                 memset(&warning, 0, sizeof(warning));
 638                         } else if(option[0] == 'x') {
 639                                 const char *opt;
 640                                 GET_ARG_AFTER(opt, "-x");
 641                                 forced_filetype = get_filetype_from_string(opt);
 642                                 if (forced_filetype == FILETYPE_UNKNOWN) {
 643                                         fprintf(stderr, "Unknown language '%s'\n", opt);
 644                                         argument_errors = true;
 645                                 }
 646                         } else if (streq(option, "M")) {
 647                                 mode = PreprocessOnly;
 648                                 add_flag(&cppflags_obst, "-M");
 649                         } else if (streq(option, "MMD") ||
 650                                    streq(option, "MD")) {
 651                             construct_dep_target = true;
 652                                 add_flag(&cppflags_obst, "-%s", option);
 653                         } else if(streq(option, "MM")  ||
 654                                    streq(option, "MP")) {
 655                                 add_flag(&cppflags_obst, "-%s", option);
 656                         } else if (streq(option, "MT") ||
 657                                    streq(option, "MQ") ||
 658                                    streq(option, "MF")) {
 659                                 const char *opt;
 660                                 GET_ARG_AFTER(opt, "-MT");
 661                                 add_flag(&cppflags_obst, "-%s", option);
 662                                 add_flag(&cppflags_obst, "%s", opt);
 663                         } else if (streq(option, "pipe")) {
 664                                 /* here for gcc compatibility */
 665                         } else if (option[0] == 'f') {
 666                                 char const *orig_opt;
 667                                 GET_ARG_AFTER(orig_opt, "-f");
 668
 669                                 if (strstart(orig_opt, "align-loops=") ||
 670                                     strstart(orig_opt, "align-jumps=") ||
 671                                     strstart(orig_opt, "align-functions=")) {
 672                                         fprintf(stderr, "ignoring gcc option '-f%s'\n", orig_opt);
 673                                 } else {
 674                                         char const *opt         = orig_opt;
 675                                         bool        truth_value = true;
 676                                         if (opt[0] == 'n' && opt[1] == 'o' && opt[2] == '-') {
 677                                                 truth_value = false;
 678                                                 opt += 3;
 679                                         }
 680
 681                                         if (streq(opt, "dollars-in-identifiers")) {
 682                                                 allow_dollar_in_symbol = truth_value;
 683                                         } if (streq(opt, "builtins")) {
 684                                                 use_builtins = truth_value;
 685                                         } else if (streq(opt, "short-wchar")) {
 686                                                 opt_short_wchar_t = truth_value;
 687                                         } else if (streq(opt, "syntax-only")) {
 688                                                 mode = truth_value ? ParseOnly : CompileAssembleLink;
 689                                         } else if (streq(opt, "omit-frame-pointer")) {
 690                                                 set_be_option(truth_value ? "omitfp" : "omitfp=no");
 691                                         } else if (streq(opt, "strength-reduce")) {
 692                                                 firm_option(truth_value ? "strength-red" : "no-strength-red");
 693                                         } else if (streq(opt, "fast-math")               ||
 694                                                    streq(opt, "jump-tables")             ||
 695                                                    streq(opt, "unroll-loops")            ||
 696                                                    streq(opt, "expensive-optimizations") ||
 697                                                    streq(opt, "common")                  ||
 698                                                    streq(opt, "PIC")                     ||
 699                                                    streq(opt, "align-loops")             ||
 700                                                    streq(opt, "align-jumps")             ||
 701                                                    streq(opt, "align-functions")) {
 702                                                 fprintf(stderr, "ignoring gcc option '-f%s'\n", orig_opt);
 703                                         } else {
 704                                                 int res = firm_option(orig_opt);
 705                                                 if (res == 0) {
 706                                                         fprintf(stderr, "error: unknown Firm option '-f%s'\n",
 707                                                                 orig_opt);
 708                                                         argument_errors = true;
 709                                                         continue;
 710                                                 } else if (res == -1) {
 711                                                         help_displayed = true;
 712                                                 }
 713                                         }
 714                                 }
 715                         } else if (option[0] == 'b') {
 716                                 const char *opt;
 717                                 GET_ARG_AFTER(opt, "-b");
 718                                 int res = firm_be_option(opt);
 719                                 if (res == 0) {
 720                                         fprintf(stderr, "error: unknown Firm backend option '-b %s'\n",
 721                                                 opt);
 722                                         argument_errors = true;
 723                                 } else if (res == -1) {
 724                                         help_displayed = true;
 725                                 } else if (strstart(opt, "isa=")) {
 726                                         strncpy(cpu_arch, opt, sizeof(cpu_arch));
 727                                 }
 728                         } else if (option[0] == 'W') {
 729                                 if (strstart(option + 1, "l,")) // a gcc-style linker option
 730                                 {
 731                                         const char *opt;
 732                                         GET_ARG_AFTER(opt, "-Wl,");
 733                                         add_flag(&ldflags_obst, "-Wl,%s", opt);
 734                                 }
 735                                 else set_warning_opt(&option[1]);
 736                         } else if(option[0] == 'm') {
 737                                 /* -m options */
 738                                 const char *opt;
 739                                 char arch_opt[64];
 740
 741                                 GET_ARG_AFTER(opt, "-m");
 742                                 if (strstart(opt, "arch=")) {
 743                                         GET_ARG_AFTER(opt, "-march=");
 744                                         snprintf(arch_opt, sizeof(arch_opt), "%s-arch=%s", cpu_arch, opt);
 745                                         int res = firm_be_option(arch_opt);
 746                                         if (res == 0)
 747                                                 argument_errors = true;
 748                                         else {
 749                                                 snprintf(arch_opt, sizeof(arch_opt), "%s-opt=%s", cpu_arch, opt);
 750                                                 int res = firm_be_option(arch_opt);
 751                                                 if (res == 0)
 752                                                         argument_errors = true;
 753                                         }
 754                                 } else if (strstart(opt, "tune=")) {
 755                                         GET_ARG_AFTER(opt, "-mtune=");
 756                                         snprintf(arch_opt, sizeof(arch_opt), "%s-opt=%s", cpu_arch, opt);
 757                                         int res = firm_be_option(arch_opt);
 758                                         if (res == 0)
 759                                                 argument_errors = true;
 760                                 } else if (strstart(opt, "cpu=")) {
 761                                         GET_ARG_AFTER(opt, "-mcpu=");
 762                                         snprintf(arch_opt, sizeof(arch_opt), "%s-arch=%s", cpu_arch, opt);
 763                                         int res = firm_be_option(arch_opt);
 764                                         if (res == 0)
 765                                                 argument_errors = true;
 766                                 } else if (strstart(opt, "fpmath=")) {
 767                                         GET_ARG_AFTER(opt, "-mfpmath=");
 768                                         if (streq(opt, "387"))
 769                                                 opt = "x87";
 770                                         else if (streq(opt, "sse"))
 771                                                 opt = "sse2";
 772                                         else {
 773                                                 fprintf(stderr, "error: option -mfpumath supports only 387 or sse\n");
 774                                                 argument_errors = true;
 775                                         }
 776                                         if(!argument_errors) {
 777                                                 snprintf(arch_opt, sizeof(arch_opt), "%s-fpunit=%s", cpu_arch, opt);
 778                                                 int res = firm_be_option(arch_opt);
 779                                                 if (res == 0)
 780                                                         argument_errors = true;
 781                                         }
 782                                 } else if (strstart(opt, "preferred-stack-boundary=")) {
 783                                         GET_ARG_AFTER(opt, "-mpreferred-stack-boundary=");
 784                                         snprintf(arch_opt, sizeof(arch_opt), "%s-stackalign=%s", cpu_arch, opt);
 785                                         int res = firm_be_option(arch_opt);
 786                                         if (res == 0)
 787                                                 argument_errors = true;
 788                                 } else if (streq(opt, "omit-leaf-frame-pointer")) {
 789                                         set_be_option("omitleaffp=1");
 790                                 } else if (streq(opt, "no-omit-leaf-frame-pointer")) {
 791                                         set_be_option("omitleaffp=0");
 792                                 } else {
 793                                         char *endptr;
 794                                         long int value = strtol(opt, &endptr, 10);
 795                                         if (*endptr != '\0') {
 796                                                 fprintf(stderr, "error: wrong option '-m %s'\n",  opt);
 797                                                 argument_errors = true;
 798                                         }
 799                                         if (value != 16 && value != 32 && value != 64) {
 800                                                 fprintf(stderr, "error: option -m supports only 16, 32 or 64\n");
 801                                                 argument_errors = true;
 802                                         } else {
 803                                                 machine_size = (unsigned int)value;
 804                                         }
 805                                 }
 806                         } else if (streq(option, "pg")) {
 807                                 set_be_option("gprof");
 808                                 add_flag(&ldflags_obst, "-pg");
 809                         } else if (streq(option, "pedantic") ||
 810                                    streq(option, "ansi")) {
 811                                 fprintf(stderr, "warning: ignoring gcc option '%s'\n", arg);
 812                         } else if (streq(option, "shared")) {
 813                                 add_flag(&ldflags_obst, "-shared");
 814                         } else if (strstart(option, "std=")) {
 815                                 if (streq(&option[4], "c99")) {
 816                                         c_mode = _C89|_C99;
 817                                 } else if (streq(&option[4], "c89")) {
 818                                         c_mode = _C89;
 819                                 } else if (streq(&option[4], "gnu99")) {
 820                                         c_mode = _C89|_C99|_GNUC;
 821                                 } else if (streq(&option[4], "microsoft")) {
 822                                         c_mode = _C89|_C99|_MS;
 823                                 } else
 824                                         fprintf(stderr, "warning: ignoring gcc option '%s'\n", arg);
 825                         } else if (streq(option, "version")) {
 826                                 print_cparser_version();
 827                         } else if (option[0] == '-') {
 828                                 /* double dash option */
 829                                 ++option;
 830                                 if (streq(option, "gcc")) {
 831                                         c_mode |= _GNUC;
 832                                 } else if (streq(option, "no-gcc")) {
 833                                         c_mode &= ~_GNUC;
 834                                 } else if (streq(option, "ms")) {
 835                                         c_mode |= _MS;
 836                                 } else if (streq(option, "no-ms")) {
 837                                         c_mode &= ~_MS;
 838                                 } else if (streq(option, "signed-chars")) {
 839                                         char_is_signed = true;
 840                                 } else if (streq(option, "unsigned-chars")) {
 841                                         char_is_signed = false;
 842                                 } else if (streq(option, "strict")) {
 843                                         strict_mode = true;
 844                                 } else if (streq(option, "lextest")) {
 845                                         mode = LexTest;
 846                                 } else if (streq(option, "benchmark")) {
 847                                         mode = BenchmarkParser;
 848                                 } else if (streq(option, "print-ast")) {
 849                                         mode = PrintAst;
 850                                 } else if (streq(option, "print-implicit-cast")) {
 851                                         print_implicit_casts = true;
 852                                 } else if (streq(option, "print-parenthesis")) {
 853                                         print_parenthesis = true;
 854                                 } else if (streq(option, "print-fluffy")) {
 855                                         mode = PrintFluffy;
 856                                 } else if (streq(option, "print-caml")) {
 857                                         mode = PrintCaml;
 858                                 } else if (streq(option, "version")) {
 859                                         print_cparser_version();
 860                                         exit(EXIT_SUCCESS);
 861                                 } else if (streq(option, "dump-function")) {
 862                                         ++i;
 863                                         if(i >= argc) {
 864                                                 fprintf(stderr, "error: "
 865                                                         "expected argument after '--dump-function'\n");
 866                                                 argument_errors = true;
 867                                                 break;
 868                                         }
 869                                         dumpfunction = argv[i];
 870                                         mode         = CompileDump;
 871                                 } else {
 872                                         fprintf(stderr, "error: unknown argument '%s'\n", arg);
 873                                         argument_errors = true;
 874                                 }
 875                         } else {
 876                                 fprintf(stderr, "error: unknown argument '%s'\n", arg);
 877                                 argument_errors = true;
 878                         }
 879                 } else {
 880                         filetype_t type = forced_filetype;
 881                         if (type == FILETYPE_AUTODETECT) {
 882                                 size_t const len = strlen(arg);
 883                                 if (len < 2 && arg[0] == '-') {
 884                                         /* - implicitly means C source file */
 885                                         type = FILETYPE_C;
 886                                 } else if (len > 2 && arg[len - 2] == '.') {
 887                                         switch (arg[len - 1]) {
 888                                         case 'c': type = FILETYPE_C;                      break;
 889                                         case 'h': type = FILETYPE_C;                      break;
 890                                         case 's': type = FILETYPE_PREPROCESSED_ASSEMBLER; break;
 891                                         case 'S': type = FILETYPE_ASSEMBLER;              break;
 892
 893                                         case 'a':
 894                                         case 'o': type = FILETYPE_OBJECT;                 break;
 895                                         }
 896                                 } else if (len > 3 && arg[len - 3] == '.') {
 897                                         if (streq(arg + len - 2, "so")) {
 898                                                 type = FILETYPE_OBJECT;
 899                                         }
 900                                 }
 901
 902                                 if (type == FILETYPE_AUTODETECT) {
 903                                         fprintf(stderr, "'%s': file format not recognized\n", arg);
 904                                         continue;
 905                                 }
 906                         }
 907
 908                         file_list_entry_t *entry
 909                                 = obstack_alloc(&file_obst, sizeof(entry[0]));
 910                         memset(entry, 0, sizeof(entry[0]));
 911                         entry->name = arg;
 912                         entry->type = type;
 913
 914                         if (last_file != NULL) {
 915                                 last_file->next = entry;
 916                         } else {
 917                                 files = entry;
 918                         }
 919                         last_file = entry;
 920                 }
 921         }
 922
 923         if (files == NULL) {
 924                 fprintf(stderr, "error: no input files specified\n");
 925                 argument_errors = true;
 926         }
 927
 928         if (help_displayed) {
 929                 return !argument_errors;
 930         }
 931         if (argument_errors) {
 932                 usage(argv[0]);
 933                 return 1;
 934         }
 935
 936         /* we do the lowering in ast2firm */
 937         firm_opt.lower_bitfields = FALSE;
 938
 939         gen_firm_init();
 940         init_symbol_table();
 941         init_tokens();
 942         init_types();
 943         init_typehash();
 944         init_basic_types();
 945         init_lexer();
 946         init_ast();
 947         init_parser();
 948         init_ast2firm();
 949
 950         if (construct_dep_target) {
 951                 if (outname != 0 && strlen(outname) >= 2) {
 952                         get_output_name(dep_target, sizeof(dep_target), outname, ".d");
 953                 } else {
 954                         get_output_name(dep_target, sizeof(dep_target), files->name, ".d");
 955                 }
 956         } else {
 957                 dep_target[0] = '\0';
 958         }
 959
 960         char outnamebuf[4096];
 961         if (outname == NULL) {
 962                 const char *filename = files->name;
 963
 964                 switch(mode) {
 965                 case BenchmarkParser:
 966                 case PrintAst:
 967                 case PrintFluffy:
 968                 case PrintCaml:
 969                 case LexTest:
 970                 case PreprocessOnly:
 971                 case ParseOnly:
 972                         outname = "-";
 973                         break;
 974                 case Compile:
 975                         get_output_name(outnamebuf, sizeof(outnamebuf), filename, ".s");
 976                         outname = outnamebuf;
 977                         break;
 978                 case CompileAssemble:
 979                         get_output_name(outnamebuf, sizeof(outnamebuf), filename, ".o");
 980                         outname = outnamebuf;
 981                         break;
 982                 case CompileDump:
 983                         get_output_name(outnamebuf, sizeof(outnamebuf), dumpfunction,
 984                                         ".vcg");
 985                         outname = outnamebuf;
 986                         break;
 987                 case CompileAssembleLink:
 988 #ifdef _WIN32
 989                         outname = "a.exe";
 990 #else
 991                         outname = "a.out";
 992 #endif
 993                         break;
 994                 }
 995         }
 996
 997         assert(outname != NULL);
 998
 999         FILE *out;
1000         if (streq(outname, "-")) {
1001                 out = stdout;
1002         } else {
1003                 out = fopen(outname, "w");
1004                 if(out == NULL) {
1005                         fprintf(stderr, "Couldn't open '%s' for writing: %s\n", outname,
1006                                         strerror(errno));
1007                         return 1;
1008                 }
1009         }
1010
1011         file_list_entry_t *file;
1012         for (file = files; file != NULL; file = file->next) {
1013                 char        asm_tempfile[1024];
1014                 const char *filename = file->name;
1015                 filetype_t  filetype = file->type;
1016
1017                 if (file->type == FILETYPE_OBJECT)
1018                         continue;
1019
1020                 FILE *in = NULL;
1021                 if (mode == LexTest) {
1022                         if (in == NULL)
1023                                 in = open_file(filename);
1024                         lextest(in, filename);
1025                         fclose(in);
1026                         exit(EXIT_SUCCESS);
1027                 }
1028
1029                 FILE *preprocessed_in = NULL;
1030                 if (filetype == FILETYPE_C || filetype == FILETYPE_ASSEMBLER) {
1031                         /* no support for input on FILE* yet */
1032                         if (in != NULL)
1033                                 panic("internal compiler error: in for preprocessor != NULL");
1034
1035                         preprocessed_in = preprocess(filename);
1036                         if (mode == PreprocessOnly) {
1037                                 copy_file(out, preprocessed_in);
1038                                 int result = pclose(preprocessed_in);
1039                                 fclose(out);
1040                                 return result;
1041                         }
1042
1043                         if (filetype == FILETYPE_C) {
1044                                 filetype = FILETYPE_PREPROCESSED_C;
1045                         } else if (filetype == FILETYPE_ASSEMBLER) {
1046                                 filetype = FILETYPE_PREPROCESSED_ASSEMBLER;
1047                         } else {
1048                                 panic("internal compiler error: unknown filetype at preproc");
1049                         }
1050
1051                         in = preprocessed_in;
1052                 }
1053
1054                 FILE *asm_out;
1055                 if(mode == Compile) {
1056                         asm_out = out;
1057                 } else {
1058                         asm_out = make_temp_file(asm_tempfile, sizeof(asm_tempfile),
1059                                                  "ccs");
1060                 }
1061
1062                 if (in == NULL)
1063                         in = open_file(filename);
1064
1065                 /* preprocess and compile */
1066                 if (filetype == FILETYPE_PREPROCESSED_C) {
1067                         translation_unit_t *const unit = do_parsing(in, filename);
1068
1069                         /* prints the AST even if errors occurred */
1070                         if (mode == PrintAst) {
1071                                 type_set_output(out);
1072                                 ast_set_output(out);
1073                                 print_ast(unit);
1074                         }
1075
1076                         if(error_count > 0) {
1077                                 /* parsing failed because of errors */
1078                                 fprintf(stderr, "%u error(s), %u warning(s)\n", error_count,
1079                                         warning_count);
1080                                 result = EXIT_FAILURE;
1081                                 continue;
1082                         } else if(warning_count > 0) {
1083                                 fprintf(stderr, "%u warning(s)\n", warning_count);
1084                         }
1085
1086                         if (in == preprocessed_in) {
1087                                 int pp_result = pclose(preprocessed_in);
1088                                 if (pp_result != EXIT_SUCCESS) {
1089                                         exit(EXIT_FAILURE);
1090                                 }
1091                         }
1092
1093                         if(mode == BenchmarkParser) {
1094                                 return result;
1095                         } else if(mode == PrintFluffy) {
1096                                 write_fluffy_decls(out, unit);
1097                                 continue;
1098                         } else if (mode == PrintCaml) {
1099                                 write_caml_decls(out, unit);
1100                                 continue;
1101                         }
1102
1103                         translation_unit_to_firm(unit);
1104
1105                         if (mode == ParseOnly) {
1106                                 continue;
1107                         }
1108
1109                         if (mode == CompileDump) {
1110                                 /* find irg */
1111                                 ident    *id     = new_id_from_str(dumpfunction);
1112                                 ir_graph *irg    = NULL;
1113                                 int       n_irgs = get_irp_n_irgs();
1114                                 for(int i = 0; i < n_irgs; ++i) {
1115                                         ir_graph *tirg   = get_irp_irg(i);
1116                                         ident    *irg_id = get_entity_ident(get_irg_entity(tirg));
1117                                         if(irg_id == id) {
1118                                                 irg = tirg;
1119                                                 break;
1120                                         }
1121                                 }
1122
1123                                 if(irg == NULL) {
1124                                         fprintf(stderr, "No graph for function '%s' found\n",
1125                                                 dumpfunction);
1126                                         exit(1);
1127                                 }
1128
1129                                 dump_ir_block_graph_file(irg, out);
1130                                 fclose(out);
1131                                 exit(0);
1132                         }
1133
1134                         gen_firm_finish(asm_out, filename, /*c_mode=*/1,
1135                                         have_const_functions);
1136                         if (asm_out != out) {
1137                                 fclose(asm_out);
1138                         }
1139
1140                 } else if (filetype == FILETYPE_PREPROCESSED_ASSEMBLER) {
1141                         copy_file(asm_out, in);
1142                         if (in == preprocessed_in) {
1143                                 int pp_result = pclose(preprocessed_in);
1144                                 if (pp_result != EXIT_SUCCESS) {
1145                                         return pp_result;
1146                                 }
1147                         }
1148                         if(asm_out != out) {
1149                                 fclose(asm_out);
1150                         }
1151                 }
1152
1153                 if (mode == Compile)
1154                         continue;
1155
1156                 /* if we're here then we have preprocessed assembly */
1157                 filename = asm_tempfile;
1158                 filetype = FILETYPE_PREPROCESSED_ASSEMBLER;
1159
1160                 /* assemble */
1161                 if (filetype == FILETYPE_PREPROCESSED_ASSEMBLER) {
1162                         char        temp[1024];
1163                         const char *filename_o;
1164                         if(mode == CompileAssemble) {
1165                                 fclose(out);
1166                                 filename_o = outname;
1167                         } else {
1168                                 FILE *tempf = make_temp_file(temp, sizeof(temp), "cco");
1169                                 fclose(tempf);
1170                                 filename_o = temp;
1171                         }
1172
1173                         assemble(filename_o, filename);
1174
1175                         size_t len = strlen(filename_o) + 1;
1176                         filename = obstack_copy(&file_obst, filename_o, len);
1177                         filetype = FILETYPE_OBJECT;
1178                 }
1179
1180                 /* ok we're done here, process next file */
1181                 file->name = filename;
1182                 file->type = filetype;
1183         }
1184
1185         if (result != EXIT_SUCCESS)
1186                 return result;
1187
1188         /* link program file */
1189         if(mode == CompileAssembleLink) {
1190                 obstack_1grow(&ldflags_obst, '\0');
1191                 const char *flags = obstack_finish(&ldflags_obst);
1192
1193                 /* construct commandline */
1194                 obstack_printf(&file_obst, "%s", LINKER);
1195                 for (file_list_entry_t *entry = files; entry != NULL;
1196                                 entry = entry->next) {
1197                         if (entry->type != FILETYPE_OBJECT)
1198                                 continue;
1199
1200                         add_flag(&file_obst, "%s", entry->name);
1201                 }
1202
1203                 add_flag(&file_obst, "-o");
1204                 add_flag(&file_obst, outname);
1205                 obstack_printf(&file_obst, "%s", flags);
1206                 obstack_1grow(&file_obst, '\0');
1207
1208                 char *commandline = obstack_finish(&file_obst);
1209
1210                 if(verbose) {
1211                         puts(commandline);
1212                 }
1213                 int err = system(commandline);
1214                 if(err != EXIT_SUCCESS) {
1215                         fprintf(stderr, "linker reported an error\n");
1216                         exit(1);
1217                 }
1218         }
1219
1220         obstack_free(&cppflags_obst, NULL);
1221         obstack_free(&ldflags_obst, NULL);
1222         obstack_free(&file_obst, NULL);
1223
1224         exit_ast2firm();
1225         exit_parser();
1226         exit_ast();
1227         exit_lexer();
1228         exit_typehash();
1229         exit_types();
1230         exit_tokens();
1231         exit_symbol_table();
1232         return 0;
1233 }