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