nsz Git - cparser/blob - main.c

   1 /*
   2  * This file is part of cparser.
   3  * Copyright (C) 2012 Matthias Braun <matze@braunis.de>
   4  */
   5 #include <config.h>
   6
   7 #define _GNU_SOURCE
   8
   9 #include <stdio.h>
  10 #include <stdlib.h>
  11 #include <stdbool.h>
  12 #include <errno.h>
  13 #include <string.h>
  14 #include <assert.h>
  15
  16 #ifdef _WIN32
  17
  18 #include <fcntl.h>
  19 #include <io.h>
  20
  21 /* no eXecute on Win32 */
  22 #define X_OK 0
  23 #define W_OK 2
  24 #define R_OK 4
  25
  26 #define O_RDWR          _O_RDWR
  27 #define O_CREAT         _O_CREAT
  28 #define O_EXCL          _O_EXCL
  29 #define O_BINARY        _O_BINARY
  30
  31 /* remap some names, we are not in the POSIX world */
  32 #define access(fname, mode)      _access(fname, mode)
  33 #define mktemp(tmpl)             _mktemp(tmpl)
  34 #define open(fname, oflag, mode) _open(fname, oflag, mode)
  35 #define fdopen(fd, mode)         _fdopen(fd, mode)
  36 #define popen(cmd, mode)         _popen(cmd, mode)
  37 #define pclose(file)             _pclose(file)
  38 #define unlink(filename)         _unlink(filename)
  39
  40 #else
  41 #include <unistd.h>
  42 #define HAVE_MKSTEMP
  43 #endif
  44
  45 #include <libfirm/firm.h>
  46 #include <libfirm/be.h>
  47 #include <libfirm/statev.h>
  48
  49 #include "preprocessor.h"
  50 #include "token_t.h"
  51 #include "types.h"
  52 #include "type_hash.h"
  53 #include "parser.h"
  54 #include "type_t.h"
  55 #include "ast2firm.h"
  56 #include "diagnostic.h"
  57 #include "lang_features.h"
  58 #include "driver/firm_opt.h"
  59 #include "driver/firm_timing.h"
  60 #include "driver/firm_machine.h"
  61 #include "adt/error.h"
  62 #include "adt/strutil.h"
  63 #include "adt/array.h"
  64 #include "wrappergen/write_fluffy.h"
  65 #include "wrappergen/write_jna.h"
  66 #include "wrappergen/write_compoundsizes.h"
  67 #include "revision.h"
  68 #include "warning.h"
  69 #include "help.h"
  70 #include "mangle.h"
  71 #include "printer.h"
  72
  73 #ifndef PREPROCESSOR
  74 #ifndef __WIN32__
  75 #define PREPROCESSOR "gcc -E -U__STRICT_ANSI__ -U__BLOCKS__"
  76 #else
  77 #define PREPROCESSOR "cpp -U__STRICT_ANSI__"
  78 #endif
  79 #endif
  80
  81 #ifndef LINKER
  82 #define LINKER    "gcc"
  83 #endif
  84
  85 #ifndef ASSEMBLER
  86 #define ASSEMBLER "gcc -c -xassembler"
  87 #endif
  88
  89 unsigned int        c_mode                    = _C89 | _C99 | _GNUC;
  90 bool                byte_order_big_endian     = false;
  91 bool                strict_mode               = false;
  92 bool                enable_main_collect2_hack = false;
  93 bool                freestanding              = false;
  94 unsigned            architecture_modulo_shift = 0;
  95
  96 static bool               char_is_signed      = true;
  97 static atomic_type_kind_t wchar_atomic_kind   = ATOMIC_TYPE_INT;
  98 static unsigned           features_on         = 0;
  99 static unsigned           features_off        = 0;
 100 static const char        *dumpfunction        = NULL;
 101 static struct obstack     file_obst;
 102 static const char        *external_preprocessor = PREPROCESSOR;
 103
 104 static machine_triple_t *target_machine;
 105 static const char       *target_triple;
 106 static int               verbose;
 107 static struct obstack    cppflags_obst;
 108 static struct obstack    ldflags_obst;
 109 static struct obstack    asflags_obst;
 110 static const char       *outname;
 111 static bool              define_intmax_types;
 112 static const char       *input_encoding;
 113 static bool              construct_dep_target;
 114
 115 typedef enum lang_standard_t {
 116         STANDARD_DEFAULT, /* gnu99 (for C, GCC does gnu89) or gnu++98 (for C++) */
 117         STANDARD_ANSI,    /* ISO C90 (for C) or ISO C++ 1998 (for C++) */
 118         STANDARD_C89,     /* ISO C90 (sic) */
 119         STANDARD_C89AMD1, /* ISO C90 as modified in amendment 1 */
 120         STANDARD_C99,     /* ISO C99 */
 121         STANDARD_C11,     /* ISO C11 */
 122         STANDARD_GNU89,   /* ISO C90 plus GNU extensions (including some C99) */
 123         STANDARD_GNU99,   /* ISO C99 plus GNU extensions */
 124         STANDARD_GNU11,   /* ISO C11 plus GNU extensions */
 125         STANDARD_CXX98,   /* ISO C++ 1998 plus amendments */
 126         STANDARD_GNUXX98  /* ISO C++ 1998 plus amendments and GNU extensions */
 127 } lang_standard_t;
 128
 129 typedef enum compilation_unit_type_t {
 130         COMPILATION_UNIT_AUTODETECT,
 131         COMPILATION_UNIT_C,
 132         COMPILATION_UNIT_PREPROCESSED_C,
 133         COMPILATION_UNIT_CXX,
 134         COMPILATION_UNIT_PREPROCESSED_CXX,
 135         COMPILATION_UNIT_AST,
 136         COMPILATION_UNIT_INTERMEDIATE_REPRESENTATION,
 137         COMPILATION_UNIT_ASSEMBLER,
 138         COMPILATION_UNIT_PREPROCESSED_ASSEMBLER,
 139         COMPILATION_UNIT_OBJECT,
 140         COMPILATION_UNIT_IR,
 141         COMPILATION_UNIT_UNKNOWN
 142 } compilation_unit_type_t;
 143
 144 typedef struct compilation_unit_t compilation_unit_t;
 145 struct compilation_unit_t {
 146         const char             *name;  /**< filename or "-" for stdin */
 147         FILE                   *input; /**< input (NULL if not opened yet) */
 148         bool                    input_is_pipe;
 149         compilation_unit_type_t type;
 150         lang_standard_t         standard;
 151         translation_unit_t     *ast;
 152         bool                    parse_errors;
 153         compilation_unit_t     *next;
 154 };
 155
 156 static char **temp_files;
 157
 158 static void get_output_name(char *buf, size_t buflen, const char *inputname,
 159                             const char *newext)
 160 {
 161         if (inputname == NULL)
 162                 inputname = "a";
 163
 164         char const *const last_slash = strrchr(inputname, '/');
 165         char const *const filename   =
 166                 last_slash != NULL ? last_slash + 1 : inputname;
 167         char const *const last_dot   = strrchr(filename, '.');
 168         char const *const name_end   =
 169                 last_dot != NULL ? last_dot : strchr(filename, '\0');
 170
 171         int const len = snprintf(buf, buflen, "%.*s%s",
 172                         (int)(name_end - filename), filename, newext);
 173 #ifdef _WIN32
 174         if (len < 0 || buflen <= (size_t)len)
 175 #else
 176         if (buflen <= (size_t)len)
 177 #endif
 178                 panic("filename too long");
 179 }
 180
 181 static bool close_input(compilation_unit_t *unit)
 182 {
 183         assert(unit->input);
 184         bool res;
 185         if (unit->input == stdin) {
 186                 res = true;
 187         } else if (unit->input_is_pipe) {
 188                 res = pclose(unit->input) == EXIT_SUCCESS;
 189         } else {
 190                 fclose(unit->input);
 191                 res = true;
 192         }
 193         unit->input = NULL;
 194         unit->name  = NULL;
 195         return res;
 196 }
 197
 198 static void print_error_summary(void)
 199 {
 200         if (error_count > 0) {
 201                 /* parsing failed because of errors */
 202                 fprintf(stderr, "%u error(s), %u warning(s)\n", error_count,
 203                                 warning_count);
 204         } else if (warning_count > 0) {
 205                 fprintf(stderr, "%u warning(s)\n", warning_count);
 206         }
 207 }
 208
 209 static void do_parsing(compilation_unit_t *unit)
 210 {
 211         ir_timer_t *t_parsing = ir_timer_new();
 212         timer_register(t_parsing, "Frontend: Parsing");
 213         timer_start(t_parsing);
 214
 215         start_parsing();
 216
 217         switch_pp_input(unit->input, unit->name, NULL, false);
 218         parse();
 219         unit->ast = finish_parsing();
 220         check_unclosed_conditionals();
 221         close_pp_input();
 222         bool res = close_input(unit);
 223
 224         print_error_summary();
 225
 226         unit->type         = COMPILATION_UNIT_AST;
 227         unit->parse_errors = error_count > 0 || !res;
 228         timer_stop(t_parsing);
 229         if (stat_ev_enabled) {
 230                 stat_ev_dbl("time_parsing", ir_timer_elapsed_sec(t_parsing));
 231         }
 232 }
 233
 234 static void add_flag(struct obstack *obst, const char *format, ...)
 235 {
 236         char buf[65536];
 237         va_list ap;
 238
 239         va_start(ap, format);
 240 #ifdef _WIN32
 241         int len =
 242 #endif
 243                 vsnprintf(buf, sizeof(buf), format, ap);
 244         va_end(ap);
 245
 246         obstack_1grow(obst, ' ');
 247 #ifdef _WIN32
 248         obstack_1grow(obst, '"');
 249         obstack_grow(obst, buf, len);
 250         obstack_1grow(obst, '"');
 251 #else
 252         /* escape stuff... */
 253         for (char *c = buf; *c != '\0'; ++c) {
 254                 switch (*c) {
 255                 case ' ':
 256                 case '"':
 257                 case '$':
 258                 case '&':
 259                 case '(':
 260                 case ')':
 261                 case ';':
 262                 case '<':
 263                 case '>':
 264                 case '\'':
 265                 case '\\':
 266                 case '\n':
 267                 case '\r':
 268                 case '\t':
 269                 case '`':
 270                 case '|':
 271                         obstack_1grow(obst, '\\');
 272                         /* FALLTHROUGH */
 273                 default:
 274                         obstack_1grow(obst, *c);
 275                         break;
 276                 }
 277         }
 278 #endif
 279 }
 280
 281 static const char *type_to_string(type_t *type)
 282 {
 283         assert(type->kind == TYPE_ATOMIC);
 284         return get_atomic_kind_name(type->atomic.akind);
 285 }
 286
 287 static char const* str_lang_standard(lang_standard_t const standard)
 288 {
 289         switch (standard) {
 290         case STANDARD_C89:     return "c89";
 291         case STANDARD_C89AMD1: return "iso9899:199409";
 292         case STANDARD_C99:     return "c99";
 293         case STANDARD_C11:     return "c11";
 294         case STANDARD_GNU89:   return "gnu89";
 295         case STANDARD_GNU99:   return "gnu99";
 296         case STANDARD_GNU11:   return "gnu11";
 297         case STANDARD_CXX98:   return "c++98";
 298         case STANDARD_GNUXX98: return "gnu++98";
 299         case STANDARD_ANSI:    break;
 300         case STANDARD_DEFAULT: break;
 301         }
 302         panic("invalid standard");
 303 }
 304
 305 static bool run_external_preprocessor(compilation_unit_t *unit)
 306 {
 307         obstack_1grow(&cppflags_obst, '\0');
 308         const char *flags = obstack_finish(&cppflags_obst);
 309
 310         const char *preprocessor = getenv("CPARSER_PP");
 311         if (preprocessor != NULL) {
 312                 obstack_printf(&cppflags_obst, "%s ", preprocessor);
 313         } else {
 314                 if (target_triple != NULL)
 315                         obstack_printf(&cppflags_obst, "%s-", target_triple);
 316                 obstack_printf(&cppflags_obst, "%s", external_preprocessor);
 317         }
 318
 319         char const *lang;
 320         switch (unit->type) {
 321         case COMPILATION_UNIT_C:         lang = "c";                  break;
 322         case COMPILATION_UNIT_CXX:       lang = "c++";                break;
 323         case COMPILATION_UNIT_ASSEMBLER: lang = "assembler-with-cpp"; break;
 324         default:                         lang = NULL;                 break;
 325         }
 326         if (lang)
 327                 add_flag(&cppflags_obst, "-x%s", lang);
 328
 329         if (unit->type == COMPILATION_UNIT_C
 330          || unit->type == COMPILATION_UNIT_CXX) {
 331                 add_flag(&cppflags_obst, "-std=%s", str_lang_standard(unit->standard));
 332
 333                 /* setup default defines */
 334                 add_flag(&cppflags_obst, "-U__WCHAR_TYPE__");
 335                 add_flag(&cppflags_obst, "-D__WCHAR_TYPE__=%s", type_to_string(type_wchar_t));
 336                 add_flag(&cppflags_obst, "-U__SIZE_TYPE__");
 337                 add_flag(&cppflags_obst, "-D__SIZE_TYPE__=%s", type_to_string(type_size_t));
 338
 339                 add_flag(&cppflags_obst, "-U__VERSION__");
 340                 add_flag(&cppflags_obst, "-D__VERSION__=\"%s\"", cparser_REVISION);
 341
 342                 if (define_intmax_types) {
 343                         add_flag(&cppflags_obst, "-U__INTMAX_TYPE__");
 344                         add_flag(&cppflags_obst, "-D__INTMAX_TYPE__=%s", type_to_string(type_intmax_t));
 345                         add_flag(&cppflags_obst, "-U__UINTMAX_TYPE__");
 346                         add_flag(&cppflags_obst, "-D__UINTMAX_TYPE__=%s", type_to_string(type_uintmax_t));
 347                 }
 348         }
 349         if (flags[0] != '\0') {
 350                 size_t len = strlen(flags);
 351                 obstack_1grow(&cppflags_obst, ' ');
 352                 obstack_grow(&cppflags_obst, flags, len);
 353         }
 354
 355         /* handle dependency generation */
 356         if (construct_dep_target) {
 357                 static char dep_target[4096];
 358                 if (outname != 0) {
 359                         size_t len = strlen(outname);
 360                         if (len > sizeof(dep_target)-4) /* leave room for .d extension */
 361                                 len = sizeof(dep_target)-4;
 362                         memcpy(dep_target, outname, len);
 363                         /* replace extension with .d if found */
 364                         char *dot = &dep_target[len-1];
 365                         for ( ; dot >= dep_target && *dot != '/'; --dot) {
 366                                 if (*dot == '.') {
 367                                         dot[1] = 'd';
 368                                         len = (dot-dep_target)+2;
 369                                         break;
 370                                 }
 371                         }
 372                         dep_target[len] = '\0';
 373                 } else {
 374                         get_output_name(dep_target, sizeof(dep_target), unit->name, ".d");
 375                 }
 376
 377                 add_flag(&cppflags_obst, "-MF");
 378                 add_flag(&cppflags_obst, dep_target);
 379         }
 380         assert(unit->input == NULL);
 381         add_flag(&cppflags_obst, unit->name);
 382         obstack_1grow(&cppflags_obst, '\0');
 383
 384         char *commandline = obstack_finish(&cppflags_obst);
 385         if (verbose) {
 386                 puts(commandline);
 387         }
 388         FILE *f = popen(commandline, "r");
 389         if (f == NULL) {
 390                 position_t const pos = { unit->name, 0, 0, 0 };
 391                 errorf(&pos, "invoking preprocessor failed");
 392                 return false;
 393         }
 394         /* we do not really need that anymore */
 395         obstack_free(&cppflags_obst, commandline);
 396
 397         unit->input         = f;
 398         unit->input_is_pipe = true;
 399         switch (unit->type) {
 400         case COMPILATION_UNIT_ASSEMBLER:
 401                 unit->type = COMPILATION_UNIT_PREPROCESSED_ASSEMBLER;
 402                 break;
 403         case COMPILATION_UNIT_C:
 404                 unit->type = COMPILATION_UNIT_PREPROCESSED_C;
 405                 break;
 406         case COMPILATION_UNIT_CXX:
 407                 unit->type = COMPILATION_UNIT_PREPROCESSED_CXX;
 408                 break;
 409         default:
 410                 unit->type = COMPILATION_UNIT_UNKNOWN;
 411                 break;
 412         }
 413
 414         return true;
 415 }
 416
 417 static void assemble(const char *out, const char *in)
 418 {
 419         obstack_1grow(&asflags_obst, '\0');
 420         const char *flags = obstack_finish(&asflags_obst);
 421
 422         const char *assembler = getenv("CPARSER_AS");
 423         if (assembler != NULL) {
 424                 obstack_printf(&asflags_obst, "%s", assembler);
 425         } else {
 426                 if (target_triple != NULL)
 427                         obstack_printf(&asflags_obst, "%s-", target_triple);
 428                 obstack_printf(&asflags_obst, "%s", ASSEMBLER);
 429         }
 430         if (flags[0] != '\0')
 431                 obstack_printf(&asflags_obst, " %s", flags);
 432
 433         obstack_printf(&asflags_obst, " %s -o %s", in, out);
 434         obstack_1grow(&asflags_obst, '\0');
 435
 436         char *commandline = obstack_finish(&asflags_obst);
 437         if (verbose) {
 438                 puts(commandline);
 439         }
 440         int err = system(commandline);
 441         if (err != EXIT_SUCCESS) {
 442                 position_t const pos = { in, 0, 0, 0 };
 443                 errorf(&pos, "assembler reported an error");
 444                 exit(EXIT_FAILURE);
 445         }
 446         obstack_free(&asflags_obst, commandline);
 447 }
 448
 449 static void print_file_name(const char *file)
 450 {
 451         add_flag(&ldflags_obst, "-print-file-name=%s", file);
 452
 453         obstack_1grow(&ldflags_obst, '\0');
 454         const char *flags = obstack_finish(&ldflags_obst);
 455
 456         /* construct commandline */
 457         const char *linker = getenv("CPARSER_LINK");
 458         if (linker != NULL) {
 459                 obstack_printf(&ldflags_obst, "%s ", linker);
 460         } else {
 461                 if (target_triple != NULL)
 462                         obstack_printf(&ldflags_obst, "%s-", target_triple);
 463                 obstack_printf(&ldflags_obst, "%s ", LINKER);
 464         }
 465         obstack_printf(&ldflags_obst, "%s ", linker);
 466         obstack_printf(&ldflags_obst, "%s", flags);
 467         obstack_1grow(&ldflags_obst, '\0');
 468
 469         char *commandline = obstack_finish(&ldflags_obst);
 470         if (verbose) {
 471                 puts(commandline);
 472         }
 473         int err = system(commandline);
 474         if (err != EXIT_SUCCESS) {
 475                 position_t const pos = { file, 0, 0, 0 };
 476                 errorf(&pos, "linker reported an error");
 477                 exit(EXIT_FAILURE);
 478         }
 479         obstack_free(&ldflags_obst, commandline);
 480 }
 481
 482 static const char *try_dir(const char *dir)
 483 {
 484         if (dir == NULL)
 485                 return dir;
 486         if (access(dir, R_OK | W_OK | X_OK) == 0)
 487                 return dir;
 488         return NULL;
 489 }
 490
 491 static const char *get_tempdir(void)
 492 {
 493         static const char *tmpdir = NULL;
 494
 495         if (tmpdir != NULL)
 496                 return tmpdir;
 497
 498         if (tmpdir == NULL)
 499                 tmpdir = try_dir(getenv("TMPDIR"));
 500         if (tmpdir == NULL)
 501                 tmpdir = try_dir(getenv("TMP"));
 502         if (tmpdir == NULL)
 503                 tmpdir = try_dir(getenv("TEMP"));
 504
 505 #ifdef P_tmpdir
 506         if (tmpdir == NULL)
 507                 tmpdir = try_dir(P_tmpdir);
 508 #endif
 509
 510         if (tmpdir == NULL)
 511                 tmpdir = try_dir("/var/tmp");
 512         if (tmpdir == NULL)
 513                 tmpdir = try_dir("/usr/tmp");
 514         if (tmpdir == NULL)
 515                 tmpdir = try_dir("/tmp");
 516
 517         if (tmpdir == NULL)
 518                 tmpdir = ".";
 519
 520         return tmpdir;
 521 }
 522
 523 #ifndef HAVE_MKSTEMP
 524 /* cheap and nasty mkstemp replacement */
 525 static int mkstemp(char *templ)
 526 {
 527         mktemp(templ);
 528         return open(templ, O_RDWR|O_CREAT|O_EXCL|O_BINARY, 0600);
 529 }
 530 #endif
 531
 532 /**
 533  * custom version of tmpnam, which: writes to an obstack, emits no warnings
 534  * during linking (like glibc/gnu ld do for tmpnam)...
 535  */
 536 static FILE *make_temp_file(const char *prefix, const char **name_result)
 537 {
 538         const char *tempdir = get_tempdir();
 539         assert(obstack_object_size(&file_obst) == 0);
 540         obstack_printf(&file_obst, "%s/%sXXXXXX", tempdir, prefix);
 541         obstack_1grow(&file_obst, '\0');
 542
 543         char *name = obstack_finish(&file_obst);
 544         int fd = mkstemp(name);
 545         if (fd == -1) {
 546                 position_t const pos = { name, 0, 0, 0 };
 547                 errorf(&pos, "could not create temporary file: %s", strerror(errno));
 548                 return NULL;
 549         }
 550         FILE *out = fdopen(fd, "w");
 551         if (out == NULL) {
 552                 position_t const pos = { name, 0, 0, 0 };
 553                 errorf(&pos, "could not open temporary file as FILE*");
 554                 return NULL;
 555         }
 556
 557         ARR_APP1(char*, temp_files, name);
 558         *name_result = name;
 559         return out;
 560 }
 561
 562 static void free_temp_files(void)
 563 {
 564         if (temp_files == NULL)
 565                 return;
 566
 567         size_t n_temp_files = ARR_LEN(temp_files);
 568         size_t i;
 569         for (i = 0; i < n_temp_files; ++i) {
 570                 char *file = temp_files[i];
 571                 unlink(file);
 572         }
 573         DEL_ARR_F(temp_files);
 574         temp_files = NULL;
 575 }
 576
 577 typedef enum compile_mode_t {
 578         BenchmarkParser,
 579         PreprocessOnly,
 580         ParseOnly,
 581         Compile,
 582         CompileDump,
 583         CompileExportIR,
 584         CompileAssemble,
 585         CompileAssembleLink,
 586         PrintAst,
 587         PrintFluffy,
 588         PrintJna,
 589         PrintCompoundSizes,
 590 } compile_mode_t;
 591
 592 static void usage(const char *argv0)
 593 {
 594         fprintf(stderr, "Usage %s [options] input [-o output]\n", argv0);
 595 }
 596
 597 static void print_cparser_version(void)
 598 {
 599         printf("cparser (%s) using libFirm (%u.%u",
 600                cparser_REVISION, ir_get_version_major(),
 601                ir_get_version_minor());
 602
 603         const char *revision = ir_get_version_revision();
 604         if (revision[0] != 0) {
 605                 putchar('-');
 606                 fputs(revision, stdout);
 607         }
 608
 609         const char *build = ir_get_version_build();
 610         if (build[0] != 0) {
 611                 putchar(' ');
 612                 fputs(build, stdout);
 613         }
 614         puts(")");
 615         puts("This is free software; see the source for copying conditions.  There is NO\n"
 616              "warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.\n");
 617 }
 618
 619 static void print_cparser_version_short(void)
 620 {
 621         puts(cparser_REVISION);
 622 }
 623
 624 static void print_help_basic(const char *argv0)
 625 {
 626         usage(argv0);
 627         puts("");
 628         put_help("--help",                   "Display this information");
 629         put_help("--version",                "Display compiler version");
 630         put_help("--help-parser",            "Display information about parser options");
 631         put_help("--help-warnings",          "Display information about warning options");
 632         put_help("--help-codegen",           "Display information about code-generation options");
 633         put_help("--help-optimization",      "Display information about optimization options");
 634         put_help("--help-linker",            "Display information about linker options");
 635         put_help("--help-language-tools",    "Display information about language tools options");
 636         put_help("--help-debug",             "Display information about compiler debugging options");
 637         put_help("--help-firm",              "Display information about direct firm options");
 638         put_help("--help-all",               "Display information about all options");
 639         put_help("-c",                       "Compile and assemble but do not link");
 640         put_help("-E",                       "Preprocess only");
 641         put_help("-S",                       "Compile but do not assembler or link");
 642         put_help("-o",                       "Specify output file");
 643         put_help("-v",                       "Verbose output (show invocation of sub-processes)");
 644         put_help("-x",                       "Force input language:");
 645         put_choice("c",                      "C");
 646         put_choice("c++",                    "C++");
 647         put_choice("assembler",              "Assembler (no preprocessing)");
 648         put_choice("assembler-with-cpp",     "Assembler with preprocessing");
 649         put_choice("none",                   "Autodetection");
 650         put_help("-pipe",                    "Ignored (gcc compatibility)");
 651 }
 652
 653 static void print_help_preprocessor(void)
 654 {
 655         put_help("-nostdinc",                "Do not search standard system include directories");
 656         put_help("-trigraphs",               "Support ISO C trigraphs");
 657         put_help("-isystem",                 "");
 658         put_help("-include",                 "");
 659         put_help("-I PATH",                  "");
 660         put_help("-D SYMBOL[=value]",        "");
 661         put_help("-U SYMBOL",                "");
 662         put_help("-Wp,OPTION",               "Pass option directly to preprocessor");
 663         put_help("-Xpreprocessor OPTION",    "Pass option directly to preprocessor");
 664         put_help("-M",                       "");
 665         put_help("-MD",                      "");
 666         put_help("-MMD",                     "");
 667         put_help("-MM",                      "");
 668         put_help("-MP",                      "");
 669         put_help("-MT",                      "");
 670         put_help("-MQ",                      "");
 671         put_help("-MF",                      "");
 672 }
 673
 674 static void print_help_parser(void)
 675 {
 676         put_help("-finput-charset=CHARSET",  "Select encoding of input files");
 677         put_help("-fmessage-length=LEN",     "Ignored (gcc compatibility)");
 678         put_help("-fshort-wchar",            "Type \"wchar_t\" is unsigned short instead of int");
 679         put_help("-fshow-column",            "Show the column number in diagnostic messages");
 680         put_help("-fsigned-char",            "Type \"char\" is a signed type");
 681         put_help("-funsigned-char",          "Type \"char\" is an unsigned type");
 682         put_help("--ms",                     "Enable msvc extensions");
 683         put_help("--no-ms",                  "Disable msvc extensions");
 684         put_help("--gcc",                    "Enable gcc extensions");
 685         put_help("--no-gcc",                 "Disable gcc extensions");
 686         put_help("-std=STANDARD",            "Specify language standard:");
 687         put_choice("c99",                    "ISO C99 standard");
 688         put_choice("c89",                    "ISO C89 standard");
 689         put_choice("c90",                    "Same as -std=c89");
 690         put_choice("c11",                    "ISO C11 standard");
 691         put_choice("c9x",                    "Deprecated");
 692         put_choice("c++",                    "ISO C++ 98");
 693         put_choice("c++98",                  "ISO C++ 98");
 694         put_choice("gnu99",                  "ISO C99 + GNU extensions (default)");
 695         put_choice("gnu89",                  "ISO C89 + GNU extensions");
 696         put_choice("gnu11",                  "ISO C11 + GNU extensions");
 697         put_choice("gnu9x",                  "Deprecated");
 698         put_choice("iso9899:1990",           "ISO C89");
 699         put_choice("iso9899:199409",         "ISO C90");
 700         put_choice("iso9899:1999",           "ISO C99");
 701         put_choice("iso9899:199x",           "Deprecated");
 702         put_help("-pedantic",                "Ignored (gcc compatibility)");
 703         put_help("-ansi",                    "-std=c90 (for C) or -std=c++98 (for C++)");
 704         put_help("--strict",                 "Enable strict conformance checking");
 705 }
 706
 707 static void print_help_warnings(void)
 708 {
 709         put_help("-f[no-]diagnostics-show-option", "Show the switch, which controls a warning, after each warning");
 710         put_help("-w",                             "Disable all warnings");
 711         put_help("-Wno-trigraphs",                 "Warn if input contains trigraphs");
 712         put_help("-Wundef",                        "Warn if an undefined macro is used in an #if");
 713         put_help("-Wmissing-include-dirs",         "Warn about missing user-specified include directories");
 714         put_help("-Wendif-labels",                 "Warn about stray text after #elif and #endif");
 715         put_help("-Winit-self",                    "Ignored (gcc compatibility)");
 716         put_help("-Wformat-y2k",                   "Ignored (gcc compatibility)");
 717         put_help("-Wformat-security",              "Ignored (gcc compatibility)");
 718         put_help("-Wold-style-declaration",        "Ignored (gcc compatibility)");
 719         put_help("-Wtype-limits",                  "Ignored (gcc compatibility)");
 720         print_warning_opt_help();
 721 }
 722
 723 static void print_help_optimization(void)
 724 {
 725         put_help("-O LEVEL",                 "Select optimization level (0-4)");
 726         firm_option_help(put_help);
 727         put_help("-fexpensive-optimizations","Ignored (gcc compatibility)");
 728 }
 729
 730 static void print_help_codegeneration(void)
 731 {
 732         put_help("-g",                       "Generate debug information");
 733         put_help("-pg",                      "Instrument code for gnu gprof");
 734         put_help("-fomit-frame-pointer",     "Produce code without frame pointer where possible");
 735         put_help("-ffreestanding",           "Compile in freestanding mode (see ISO C standard)");
 736         put_help("-fhosted",                 "Compile in hosted (not freestanding) mode");
 737         put_help("-fprofile-generate",       "Generate instrumented code to collect profile information");
 738         put_help("-fprofile-use",            "Use profile information generated by instrumented binaries");
 739         put_help("-ffp-precise",             "Precise floating point model");
 740         put_help("-ffp-fast",                "Imprecise floating point model");
 741         put_help("-ffp-strict",              "Strict floating point model");
 742         put_help("-pthread",                 "Use pthread threading library");
 743         put_help("-mtarget=TARGET",          "Specify target architecture as CPU-manufacturer-OS triple");
 744         put_help("-mtriple=TARGET",          "Alias for -mtarget (clang compatibility)");
 745         put_help("-march=ARCH",              "");
 746         put_help("-mtune=ARCH",              "");
 747         put_help("-mcpu=CPU",                "");
 748         put_help("-mfpmath=",                "");
 749         put_help("-mpreferred-stack-boundary=", "");
 750         put_help("-mrtd",                    "");
 751         put_help("-mregparm=",               "Not supported yet");
 752         put_help("-msoft-float",             "Not supported yet");
 753         put_help("-m32",                     "Generate 32bit code");
 754         put_help("-m64",                     "Generate 64bit code");
 755         put_help("-fverbose-asm",            "Ignored (gcc compatibility)");
 756         put_help("-fjump-tables",            "Ignored (gcc compatibility)");
 757         put_help("-fcommon",                 "Ignored (gcc compatibility)");
 758         put_help("-foptimize-sibling-calls", "Ignored (gcc compatibility)");
 759         put_help("-falign-loops",            "Ignored (gcc compatibility)");
 760         put_help("-falign-jumps",            "Ignored (gcc compatibility)");
 761         put_help("-falign-functions",        "Ignored (gcc compatibility)");
 762         put_help("-fPIC",                    "Ignored (gcc compatibility)");
 763         put_help("-ffast-math",              "Same as -ffp-fast (gcc compatibility)");
 764         puts("");
 765         puts("\tMost of these options can be used with a no- prefix to disable them");
 766         puts("\te.g. -fno-omit-frame-pointer");
 767 }
 768
 769 static void print_help_linker(void)
 770 {
 771         put_help("-l LIBRARY",               "");
 772         put_help("-L PATH",                  "");
 773         put_help("-s",                       "Do not produce symbol table and relocation information");
 774         put_help("-shared",                  "Produce a shared library");
 775         put_help("-static",                  "Produce statically linked binary");
 776         put_help("-Wa,OPTION",               "Pass option directly to assembler");
 777         put_help("-Xassembler OPTION",       "Pass option directly to assembler");
 778         put_help("-Wl,OPTION",               "Pass option directly to linker");
 779         put_help("-Xlinker OPTION",          "Pass option directly to linker");
 780 }
 781
 782 static void print_help_debug(void)
 783 {
 784         put_help("--print-ast",              "Preprocess, parse and print AST");
 785         put_help("--print-implicit-cast",    "");
 786         put_help("--print-parenthesis",      "");
 787         put_help("--benchmark",              "Preprocess and parse, produces no output");
 788         put_help("--time",                   "Measure time of compiler passes");
 789         put_help("--statev",                 "Produce statev output");
 790         put_help("--filtev=filter",          "Set statev filter regex");
 791         put_help("--dump-function func",     "Preprocess, parse and output vcg graph of func");
 792         put_help("--export-ir",              "Preprocess, parse and output compiler intermediate representation");
 793 }
 794
 795 static void print_help_language_tools(void)
 796 {
 797         put_help("--print-fluffy",           "Preprocess, parse and generate declarations for the fluffy language");
 798         put_help("--print-jna",              "Preprocess, parse and generate declarations for JNA");
 799         put_help("--jna-limit filename",     "");
 800         put_help("--jna-libname name",       "");
 801 }
 802
 803 static void print_help_firm(void)
 804 {
 805         put_help("-bOPTION",                 "Directly pass option to libFirm backend");
 806         int res = be_parse_arg("help");
 807         (void) res;
 808         assert(res);
 809 }
 810
 811 typedef enum {
 812         HELP_NONE          = 0,
 813         HELP_BASIC         = 1 << 0,
 814         HELP_PREPROCESSOR  = 1 << 1,
 815         HELP_PARSER        = 1 << 2,
 816         HELP_WARNINGS      = 1 << 3,
 817         HELP_OPTIMIZATION  = 1 << 4,
 818         HELP_CODEGEN       = 1 << 5,
 819         HELP_LINKER        = 1 << 6,
 820         HELP_LANGUAGETOOLS = 1 << 7,
 821         HELP_DEBUG         = 1 << 8,
 822         HELP_FIRM          = 1 << 9,
 823
 824         HELP_ALL           = -1
 825 } help_sections_t;
 826
 827 static void print_help(const char *argv0, help_sections_t sections)
 828 {
 829         if (sections & HELP_BASIC)         print_help_basic(argv0);
 830         if (sections & HELP_PREPROCESSOR)  print_help_preprocessor();
 831         if (sections & HELP_PARSER)        print_help_parser();
 832         if (sections & HELP_WARNINGS)      print_help_warnings();
 833         if (sections & HELP_OPTIMIZATION)  print_help_optimization();
 834         if (sections & HELP_CODEGEN)       print_help_codegeneration();
 835         if (sections & HELP_LINKER)        print_help_linker();
 836         if (sections & HELP_LANGUAGETOOLS) print_help_language_tools();
 837         if (sections & HELP_DEBUG)         print_help_debug();
 838         if (sections & HELP_FIRM)          print_help_firm();
 839 }
 840
 841 static void set_be_option(const char *arg)
 842 {
 843         int res = be_parse_arg(arg);
 844         (void) res;
 845         assert(res);
 846 }
 847
 848 static compilation_unit_type_t get_unit_type_from_string(const char *string)
 849 {
 850         if (streq(string, "c") || streq(string, "c-header"))
 851                 return COMPILATION_UNIT_C;
 852         if (streq(string, "c++") || streq(string, "c++-header"))
 853                 return COMPILATION_UNIT_CXX;
 854         if (streq(string, "assembler"))
 855                 return COMPILATION_UNIT_PREPROCESSED_ASSEMBLER;
 856         if (streq(string, "assembler-with-cpp"))
 857                 return COMPILATION_UNIT_ASSEMBLER;
 858         if (streq(string, "none"))
 859                 return COMPILATION_UNIT_AUTODETECT;
 860
 861         return COMPILATION_UNIT_UNKNOWN;
 862 }
 863
 864 static bool init_os_support(void)
 865 {
 866         wchar_atomic_kind         = ATOMIC_TYPE_INT;
 867         enable_main_collect2_hack = false;
 868         define_intmax_types       = false;
 869
 870         if (firm_is_unixish_os(target_machine)) {
 871                 set_create_ld_ident(create_name_linux_elf);
 872         } else if (firm_is_darwin_os(target_machine)) {
 873                 set_create_ld_ident(create_name_macho);
 874                 define_intmax_types = true;
 875         } else if (firm_is_windows_os(target_machine)) {
 876                 wchar_atomic_kind         = ATOMIC_TYPE_USHORT;
 877                 enable_main_collect2_hack = true;
 878                 set_create_ld_ident(create_name_win32);
 879         } else {
 880                 return false;
 881         }
 882
 883         return true;
 884 }
 885
 886 static bool parse_target_triple(const char *arg)
 887 {
 888         machine_triple_t *triple = firm_parse_machine_triple(arg);
 889         if (triple == NULL) {
 890                 errorf(NULL, "target-triple '%s' is not in the form 'cpu_type-manufacturer-operating_system'", arg);
 891                 return false;
 892         }
 893         target_machine = triple;
 894         return true;
 895 }
 896
 897 static unsigned decide_modulo_shift(unsigned type_size)
 898 {
 899         if (architecture_modulo_shift == 0)
 900                 return 0;
 901         if (type_size < architecture_modulo_shift)
 902                 return architecture_modulo_shift;
 903         return type_size;
 904 }
 905
 906 static bool is_ia32_cpu(const char *architecture)
 907 {
 908         return streq(architecture, "i386")
 909             || streq(architecture, "i486")
 910             || streq(architecture, "i586")
 911             || streq(architecture, "i686")
 912             || streq(architecture, "i786");
 913 }
 914
 915 static const char *setup_isa_from_tripel(const machine_triple_t *machine)
 916 {
 917         const char *cpu = machine->cpu_type;
 918
 919         if (is_ia32_cpu(cpu)) {
 920                 return "ia32";
 921         } else if (streq(cpu, "x86_64")) {
 922                 return "amd64";
 923         } else if (streq(cpu, "sparc")) {
 924                 return "sparc";
 925         } else if (streq(cpu, "arm")) {
 926                 return "arm";
 927         } else {
 928                 errorf(NULL, "unknown cpu '%s' in target-triple", cpu);
 929                 return NULL;
 930         }
 931 }
 932
 933 static const char *setup_target_machine(void)
 934 {
 935         if (!setup_firm_for_machine(target_machine))
 936                 exit(1);
 937
 938         const char *isa = setup_isa_from_tripel(target_machine);
 939
 940         if (isa == NULL)
 941                 exit(1);
 942
 943         init_os_support();
 944
 945         return isa;
 946 }
 947
 948 /**
 949  * initialize cparser type properties based on a firm type
 950  */
 951 static void set_typeprops_type(atomic_type_properties_t* props, ir_type *type)
 952 {
 953         props->size             = get_type_size_bytes(type);
 954         props->alignment        = get_type_alignment_bytes(type);
 955         props->struct_alignment = props->alignment;
 956 }
 957
 958 /**
 959  * Copy atomic type properties except the integer conversion rank
 960  */
 961 static void copy_typeprops(atomic_type_properties_t *dest,
 962                            const atomic_type_properties_t *src)
 963 {
 964         dest->size             = src->size;
 965         dest->alignment        = src->alignment;
 966         dest->struct_alignment = src->struct_alignment;
 967         dest->flags            = src->flags;
 968 }
 969
 970 static void init_types_and_adjust(void)
 971 {
 972         const backend_params *be_params = be_get_backend_param();
 973         unsigned machine_size = be_params->machine_size;
 974         init_types(machine_size);
 975
 976         atomic_type_properties_t *props = atomic_type_properties;
 977
 978         /* adjust types as requested by target architecture */
 979         ir_type *const type_ld = be_params->type_long_double;
 980         if (type_ld) {
 981                 set_typeprops_type(&props[ATOMIC_TYPE_LONG_DOUBLE], type_ld);
 982                 atomic_modes[ATOMIC_TYPE_LONG_DOUBLE] = get_type_mode(type_ld);
 983         }
 984
 985         ir_type *const type_ll = be_params->type_long_long;
 986         if (type_ll)
 987                 set_typeprops_type(&props[ATOMIC_TYPE_LONGLONG], type_ll);
 988
 989         ir_type *const type_ull = be_params->type_unsigned_long_long;
 990         if (type_ull)
 991                 set_typeprops_type(&props[ATOMIC_TYPE_ULONGLONG], type_ull);
 992
 993         /* operating system ABI specifics */
 994         if (firm_is_darwin_os(target_machine)) {
 995                 if (is_ia32_cpu(target_machine->cpu_type)) {
 996                         props[ATOMIC_TYPE_LONGLONG].struct_alignment    =  4;
 997                         props[ATOMIC_TYPE_ULONGLONG].struct_alignment   =  4;
 998                         props[ATOMIC_TYPE_DOUBLE].struct_alignment      =  4;
 999                         props[ATOMIC_TYPE_LONG_DOUBLE].size             = 16;
1000                         props[ATOMIC_TYPE_LONG_DOUBLE].alignment        = 16;
1001                         props[ATOMIC_TYPE_LONG_DOUBLE].struct_alignment = 16;
1002                 }
1003         } else if (firm_is_windows_os(target_machine)) {
1004                 if (is_ia32_cpu(target_machine->cpu_type)) {
1005                         props[ATOMIC_TYPE_LONGLONG].struct_alignment    =  8;
1006                         props[ATOMIC_TYPE_ULONGLONG].struct_alignment   =  8;
1007                         props[ATOMIC_TYPE_DOUBLE].struct_alignment      =  8;
1008                 } else if (machine_size == 64) {
1009                         /* to ease porting of old c-code microsoft decided to use 32bits
1010                          * even for long */
1011                         props[ATOMIC_TYPE_LONG]  = props[ATOMIC_TYPE_INT];
1012                         props[ATOMIC_TYPE_ULONG] = props[ATOMIC_TYPE_UINT];
1013                 }
1014
1015                 /* on windows long double is not supported */
1016                 props[ATOMIC_TYPE_LONG_DOUBLE] = props[ATOMIC_TYPE_DOUBLE];
1017         } else if (firm_is_unixish_os(target_machine)) {
1018                 if (is_ia32_cpu(target_machine->cpu_type)) {
1019                         props[ATOMIC_TYPE_DOUBLE].struct_alignment    = 4;
1020                         props[ATOMIC_TYPE_LONGLONG].struct_alignment  = 4;
1021                         props[ATOMIC_TYPE_ULONGLONG].struct_alignment = 4;
1022                 }
1023         }
1024
1025         /* stuff decided after processing operating system specifics and
1026          * commandline flags */
1027         if (char_is_signed) {
1028                 props[ATOMIC_TYPE_CHAR].flags |= ATOMIC_TYPE_FLAG_SIGNED;
1029         } else {
1030                 props[ATOMIC_TYPE_CHAR].flags &= ~ATOMIC_TYPE_FLAG_SIGNED;
1031         }
1032         /* copy over wchar_t properties (including rank) */
1033         props[ATOMIC_TYPE_WCHAR_T] = props[wchar_atomic_kind];
1034
1035         /* initialize defaults for unsupported types */
1036         if (!type_ll) {
1037                 copy_typeprops(&props[ATOMIC_TYPE_LONGLONG], &props[ATOMIC_TYPE_LONG]);
1038         }
1039         if (!type_ull) {
1040                 copy_typeprops(&props[ATOMIC_TYPE_ULONGLONG],
1041                                &props[ATOMIC_TYPE_ULONG]);
1042         }
1043         if (!type_ld) {
1044                 copy_typeprops(&props[ATOMIC_TYPE_LONG_DOUBLE],
1045                                &props[ATOMIC_TYPE_DOUBLE]);
1046         }
1047
1048         /* initialize firm pointer modes */
1049         char               name[64];
1050         unsigned           bit_size     = machine_size;
1051         unsigned           modulo_shift = decide_modulo_shift(bit_size);
1052
1053         snprintf(name, sizeof(name), "p%u", machine_size);
1054         ir_mode *ptr_mode = new_reference_mode(name, irma_twos_complement, bit_size, modulo_shift);
1055
1056         if (machine_size == 16) {
1057                 set_reference_mode_signed_eq(ptr_mode, mode_Hs);
1058                 set_reference_mode_unsigned_eq(ptr_mode, mode_Hu);
1059         } else if (machine_size == 32) {
1060                 set_reference_mode_signed_eq(ptr_mode, mode_Is);
1061                 set_reference_mode_unsigned_eq(ptr_mode, mode_Iu);
1062         } else if (machine_size == 64) {
1063                 set_reference_mode_signed_eq(ptr_mode, mode_Ls);
1064                 set_reference_mode_unsigned_eq(ptr_mode, mode_Lu);
1065         } else {
1066                 panic("strange machine_size when determining pointer modes");
1067         }
1068
1069         /* Hmm, pointers should be machine size */
1070         set_modeP_data(ptr_mode);
1071         set_modeP_code(ptr_mode);
1072
1073         byte_order_big_endian = be_params->byte_order_big_endian;
1074         if (be_params->modulo_shift_efficient) {
1075                 architecture_modulo_shift = machine_size;
1076         } else {
1077                 architecture_modulo_shift = 0;
1078         }
1079 }
1080
1081 static void setup_cmode(const compilation_unit_t *unit)
1082 {
1083         compilation_unit_type_t type     = unit->type;
1084         lang_standard_t         standard = unit->standard;
1085         if (type == COMPILATION_UNIT_PREPROCESSED_C || type == COMPILATION_UNIT_C) {
1086                 switch (standard) {
1087                 case STANDARD_C89:     c_mode = _C89;                       break;
1088                                                            /* TODO determine difference between these two */
1089                 case STANDARD_C89AMD1: c_mode = _C89;                       break;
1090                 case STANDARD_C99:     c_mode = _C89 | _C99;                break;
1091                 case STANDARD_C11:     c_mode = _C89 | _C99 | _C11;         break;
1092                 case STANDARD_GNU89:   c_mode = _C89 |               _GNUC; break;
1093                 case STANDARD_GNU11:   c_mode = _C89 | _C99 | _C11 | _GNUC; break;
1094
1095                 case STANDARD_ANSI:
1096                 case STANDARD_CXX98:
1097                 case STANDARD_GNUXX98:
1098                 case STANDARD_DEFAULT:
1099                         fprintf(stderr, "warning: command line option \"-std=%s\" is not valid for C\n", str_lang_standard(standard));
1100                         /* FALLTHROUGH */
1101                 case STANDARD_GNU99:   c_mode = _C89 | _C99 | _GNUC; break;
1102                 }
1103         } else if (type == COMPILATION_UNIT_PREPROCESSED_CXX
1104                    || type == COMPILATION_UNIT_CXX) {
1105                 switch (standard) {
1106                 case STANDARD_CXX98: c_mode = _CXX; break;
1107
1108                 case STANDARD_ANSI:
1109                 case STANDARD_C89:
1110                 case STANDARD_C89AMD1:
1111                 case STANDARD_C99:
1112                 case STANDARD_C11:
1113                 case STANDARD_GNU89:
1114                 case STANDARD_GNU99:
1115                 case STANDARD_GNU11:
1116                 case STANDARD_DEFAULT:
1117                         fprintf(stderr, "warning: command line option \"-std=%s\" is not valid for C++\n", str_lang_standard(standard));
1118                         /* FALLTHROUGH */
1119                 case STANDARD_GNUXX98: c_mode = _CXX | _GNUC; break;
1120                 }
1121         }
1122
1123         c_mode |= features_on;
1124         c_mode &= ~features_off;
1125 }
1126
1127 static void determine_unit_standard(compilation_unit_t *unit,
1128                                     lang_standard_t standard)
1129 {
1130         unit->standard = standard;
1131         switch (standard) {
1132         case STANDARD_ANSI:
1133                 switch (unit->type) {
1134                 case COMPILATION_UNIT_C:
1135                 case COMPILATION_UNIT_PREPROCESSED_C:
1136                         unit->standard = STANDARD_C89;
1137                         break;
1138                 case COMPILATION_UNIT_CXX:
1139                 case COMPILATION_UNIT_PREPROCESSED_CXX:
1140                         unit->standard = STANDARD_CXX98;
1141                         break;
1142                 default:
1143                         break;
1144                 }
1145                 break;
1146
1147         case STANDARD_DEFAULT:
1148                 switch (unit->type) {
1149                 case COMPILATION_UNIT_C:
1150                 case COMPILATION_UNIT_PREPROCESSED_C:
1151                         unit->standard = STANDARD_GNU99;
1152                         break;
1153                 case COMPILATION_UNIT_CXX:
1154                 case COMPILATION_UNIT_PREPROCESSED_CXX:
1155                         unit->standard = STANDARD_GNUXX98;
1156                         break;
1157                 default:
1158                         break;
1159                 }
1160                 break;
1161
1162         default:
1163                 break;
1164         }
1165 }
1166
1167 static bool output_preprocessor_tokens(compilation_unit_t *unit, FILE *out)
1168 {
1169         /* just here for gcc compatibility */
1170         fprintf(out, "# 1 \"%s\"\n", unit->name);
1171         fprintf(out, "# 1 \"<built-in>\"\n");
1172         fprintf(out, "# 1 \"<command-line>\"\n");
1173
1174         set_preprocessor_output(out);
1175         switch_pp_input(unit->input, unit->name, NULL, false);
1176
1177         for (;;) {
1178                 next_preprocessing_token();
1179                 if (pp_token.kind == T_EOF)
1180                         break;
1181                 emit_pp_token();
1182         }
1183
1184         fputc('\n', out);
1185         check_unclosed_conditionals();
1186         close_pp_input();
1187         print_error_summary();
1188         set_preprocessor_output(NULL);
1189
1190         if (unit->type == COMPILATION_UNIT_C) {
1191                 unit->type = COMPILATION_UNIT_PREPROCESSED_C;
1192         } else if (unit->type == COMPILATION_UNIT_CXX) {
1193                 unit->type = COMPILATION_UNIT_PREPROCESSED_CXX;
1194         }
1195         bool res = close_input(unit);
1196         return res && error_count == 0;
1197 }
1198
1199 static void copy_file(FILE *dest, FILE *input)
1200 {
1201         char buf[16384];
1202
1203         while (!feof(input) && !ferror(dest)) {
1204                 size_t read = fread(buf, 1, sizeof(buf), input);
1205                 if (fwrite(buf, 1, read, dest) != read) {
1206                         perror("could not write output");
1207                 }
1208         }
1209 }
1210
1211 static bool open_input(compilation_unit_t *unit)
1212 {
1213         /* input already available as FILE? */
1214         if (unit->input != NULL)
1215                 return true;
1216
1217         const char *const inputname = unit->name;
1218         unit->input_is_pipe = false;
1219         if (streq(inputname, "-")) {
1220                 unit->input   = stdin;
1221         } else {
1222                 unit->input = fopen(inputname, "r");
1223                 if (unit->input == NULL) {
1224                         position_t const pos = { inputname, 0, 0, 0 };
1225                         errorf(&pos, "could not open: %s", strerror(errno));
1226                         return false;
1227                 }
1228         }
1229         return true;
1230 }
1231
1232 static void node_counter(ir_node *node, void *env)
1233 {
1234         (void)node;
1235         unsigned long long *count = (unsigned long long*)env;
1236         ++(*count);
1237 }
1238
1239 static unsigned long long count_firm_nodes(void)
1240 {
1241         unsigned long long count = 0;
1242
1243         int n_irgs = get_irp_n_irgs();
1244         for (int i = 0; i < n_irgs; ++i) {
1245                 ir_graph *irg = get_irp_irg(i);
1246                 irg_walk_graph(irg, node_counter, NULL, &count);
1247         }
1248         return count;
1249 }
1250
1251 static int compilation_loop(compile_mode_t mode, compilation_unit_t *units,
1252                                                         lang_standard_t standard, FILE *out)
1253 {
1254         int  result                   = EXIT_SUCCESS;
1255         bool already_constructed_firm = false;
1256         for (compilation_unit_t *unit = units; unit != NULL; unit = unit->next) {
1257                 const char *const inputname = unit->name;
1258
1259                 determine_unit_standard(unit, standard);
1260                 setup_cmode(unit);
1261
1262                 stat_ev_ctx_push_str("compilation_unit", inputname);
1263
1264 again:
1265                 switch (unit->type) {
1266                 case COMPILATION_UNIT_IR: {
1267                         if (!open_input(unit)) {
1268                                 result = EXIT_FAILURE;
1269                                 break;
1270                         }
1271                         if (ir_import_file(unit->input, unit->name)) {
1272                                 position_t const pos = { inputname, 0, 0, 0 };
1273                                 errorf(&pos, "import of firm graph failed");
1274                                 result = EXIT_FAILURE;
1275                                 break;
1276                         }
1277                         unit->type = COMPILATION_UNIT_INTERMEDIATE_REPRESENTATION;
1278                         goto again;
1279                 }
1280                 case COMPILATION_UNIT_ASSEMBLER: {
1281                         if (external_preprocessor == NULL) {
1282                                 panic("preprocessed assembler not possible with internal preprocessor yet");
1283                         }
1284                         if (!run_external_preprocessor(unit)) {
1285                                 result = EXIT_FAILURE;
1286                                 break;
1287                         }
1288                         /* write file to output... */
1289                         FILE *asm_out;
1290                         if (mode == PreprocessOnly) {
1291                                 asm_out = out;
1292                         } else {
1293                                 asm_out = make_temp_file("ccs", &unit->name);
1294                         }
1295                         assert(unit->input != NULL);
1296                         assert(unit->input_is_pipe);
1297                         copy_file(asm_out, unit->input);
1298                         if (asm_out != out)
1299                                 fclose(asm_out);
1300                         unit->type = COMPILATION_UNIT_PREPROCESSED_ASSEMBLER;
1301                         goto again;
1302                 }
1303                 case COMPILATION_UNIT_C:
1304                 case COMPILATION_UNIT_CXX:
1305                         if (external_preprocessor != NULL) {
1306                                 if (!run_external_preprocessor(unit)) {
1307                                         result = EXIT_FAILURE;
1308                                         break;
1309                                 }
1310                                 goto again;
1311                         }
1312                         /* FALLTHROUGH */
1313
1314                 case COMPILATION_UNIT_PREPROCESSED_C:
1315                 case COMPILATION_UNIT_PREPROCESSED_CXX: {
1316                         if (!open_input(unit)) {
1317                                 result = EXIT_FAILURE;
1318                                 break;
1319                         }
1320                         init_tokens();
1321
1322                         if (mode == PreprocessOnly) {
1323                                 if (!output_preprocessor_tokens(unit, out)) {
1324                                         result = EXIT_FAILURE;
1325                                         break;
1326                                 }
1327                                 break;
1328                         }
1329
1330                         /* do the actual parsing */
1331                         do_parsing(unit);
1332                         goto again;
1333                 }
1334                 case COMPILATION_UNIT_AST:
1335                         /* prints the AST even if errors occurred */
1336                         if (mode == PrintAst) {
1337                                 print_to_file(out);
1338                                 print_ast(unit->ast);
1339                         }
1340                         if (unit->parse_errors) {
1341                                 result = EXIT_FAILURE;
1342                                 break;
1343                         }
1344
1345                         if (mode == BenchmarkParser) {
1346                                 break;
1347                         } else if (mode == PrintFluffy) {
1348                                 write_fluffy_decls(out, unit->ast);
1349                                 break;
1350                         } else if (mode == PrintJna) {
1351                                 write_jna_decls(out, unit->ast);
1352                                 break;
1353                         } else if (mode == PrintCompoundSizes) {
1354                                 write_compoundsizes(out, unit->ast);
1355                                 break;
1356                         }
1357
1358                         /* build the firm graph */
1359                         ir_timer_t *t_construct = ir_timer_new();
1360                         timer_register(t_construct, "Frontend: Graph construction");
1361                         timer_start(t_construct);
1362                         if (already_constructed_firm) {
1363                                 panic("compiling multiple files/translation units not possible");
1364                         }
1365                         init_implicit_optimizations();
1366                         translation_unit_to_firm(unit->ast);
1367                         already_constructed_firm = true;
1368                         timer_stop(t_construct);
1369                         if (stat_ev_enabled) {
1370                                 stat_ev_dbl("time_graph_construction", ir_timer_elapsed_sec(t_construct));
1371                                 stat_ev_int("size_graph_construction", count_firm_nodes());
1372                         }
1373                         unit->type = COMPILATION_UNIT_INTERMEDIATE_REPRESENTATION;
1374                         goto again;
1375
1376                 case COMPILATION_UNIT_INTERMEDIATE_REPRESENTATION:
1377                         if (mode == ParseOnly)
1378                                 break;
1379
1380                         if (mode == CompileDump) {
1381                                 /* find irg */
1382                                 ident    *id     = new_id_from_str(dumpfunction);
1383                                 ir_graph *irg    = NULL;
1384                                 int       n_irgs = get_irp_n_irgs();
1385                                 for (int i = 0; i < n_irgs; ++i) {
1386                                         ir_graph *tirg   = get_irp_irg(i);
1387                                         ident    *irg_id = get_entity_ident(get_irg_entity(tirg));
1388                                         if (irg_id == id) {
1389                                                 irg = tirg;
1390                                                 break;
1391                                         }
1392                                 }
1393
1394                                 if (irg == NULL) {
1395                                         errorf(NULL, "no graph for function '%s' found", dumpfunction);
1396                                         return EXIT_FAILURE;
1397                                 }
1398
1399                                 dump_ir_graph_file(out, irg);
1400                                 fclose(out);
1401                                 return EXIT_SUCCESS;
1402                         }
1403
1404                         if (mode == CompileExportIR) {
1405                                 ir_export_file(out);
1406                                 if (ferror(out) != 0) {
1407                                         errorf(NULL, "writing to output failed");
1408                                         return EXIT_FAILURE;
1409                                 }
1410                                 return EXIT_SUCCESS;
1411                         }
1412
1413                         FILE *asm_out;
1414                         if (mode == Compile) {
1415                                 asm_out = out;
1416                         } else {
1417                                 asm_out = make_temp_file("ccs", &unit->name);
1418                         }
1419                         ir_timer_t *t_opt_codegen = ir_timer_new();
1420                         timer_register(t_opt_codegen, "Optimization and Codegeneration");
1421                         timer_start(t_opt_codegen);
1422                         generate_code(asm_out, inputname);
1423                         timer_stop(t_opt_codegen);
1424                         if (stat_ev_enabled) {
1425                                 stat_ev_dbl("time_opt_codegen", ir_timer_elapsed_sec(t_opt_codegen));
1426                         }
1427                         if (asm_out != out) {
1428                                 fclose(asm_out);
1429                         }
1430                         unit->type = COMPILATION_UNIT_PREPROCESSED_ASSEMBLER;
1431                         goto again;
1432                 case COMPILATION_UNIT_PREPROCESSED_ASSEMBLER:
1433                         if (mode != CompileAssemble && mode != CompileAssembleLink)
1434                                 break;
1435
1436                         /* assemble */
1437                         const char *input = unit->name;
1438                         if (mode == CompileAssemble) {
1439                                 fclose(out);
1440                                 unit->name = outname;
1441                         } else {
1442                                 FILE *tempf = make_temp_file("cco", &unit->name);
1443                                 /* hackish... */
1444                                 fclose(tempf);
1445                         }
1446
1447                         assemble(unit->name, input);
1448
1449                         unit->type = COMPILATION_UNIT_OBJECT;
1450                         goto again;
1451                 case COMPILATION_UNIT_UNKNOWN:
1452                 case COMPILATION_UNIT_AUTODETECT:
1453                 case COMPILATION_UNIT_OBJECT:
1454                         break;
1455                 }
1456
1457                 stat_ev_ctx_pop("compilation_unit");
1458         }
1459         return result;
1460 }
1461
1462 static int link_program(compilation_unit_t *units)
1463 {
1464         obstack_1grow(&ldflags_obst, '\0');
1465         const char *flags = obstack_finish(&ldflags_obst);
1466
1467         /* construct commandline */
1468         const char *linker = getenv("CPARSER_LINK");
1469         if (linker != NULL) {
1470                 obstack_printf(&file_obst, "%s ", linker);
1471         } else {
1472                 if (target_triple != NULL)
1473                         obstack_printf(&file_obst, "%s-", target_triple);
1474                 obstack_printf(&file_obst, "%s ", LINKER);
1475         }
1476
1477         for (compilation_unit_t *unit = units; unit != NULL; unit = unit->next) {
1478                 if (unit->type != COMPILATION_UNIT_OBJECT)
1479                         continue;
1480
1481                 add_flag(&file_obst, "%s", unit->name);
1482         }
1483
1484         add_flag(&file_obst, "-o");
1485         add_flag(&file_obst, outname);
1486         obstack_printf(&file_obst, "%s", flags);
1487         obstack_1grow(&file_obst, '\0');
1488
1489         char *commandline = obstack_finish(&file_obst);
1490
1491         if (verbose) {
1492                 puts(commandline);
1493         }
1494         int err = system(commandline);
1495         if (err != EXIT_SUCCESS) {
1496                 errorf(NULL, "linker reported an error");
1497                 return EXIT_FAILURE;
1498         }
1499         return EXIT_SUCCESS;
1500 }
1501
1502 int main(int argc, char **argv)
1503 {
1504         const char         *print_file_name_file = NULL;
1505         compile_mode_t      mode                 = CompileAssembleLink;
1506         int                 opt_level            = 1;
1507         char                cpu_arch[16]         = "ia32";
1508         compilation_unit_t *units                = NULL;
1509         compilation_unit_t *last_unit            = NULL;
1510         bool                produce_statev       = false;
1511         const char         *filtev               = NULL;
1512         bool                profile_generate     = false;
1513         bool                profile_use          = false;
1514         bool                do_timing            = false;
1515         bool                print_timing         = false;
1516
1517         /* hack for now... */
1518         if (strstr(argv[0], "pptest") != NULL) {
1519                 extern int pptest_main(int argc, char **argv);
1520                 return pptest_main(argc, argv);
1521         }
1522
1523         temp_files = NEW_ARR_F(char*, 0);
1524         atexit(free_temp_files);
1525
1526         obstack_init(&cppflags_obst);
1527         obstack_init(&ldflags_obst);
1528         obstack_init(&asflags_obst);
1529         obstack_init(&file_obst);
1530         init_include_paths();
1531
1532 #define GET_ARG_AFTER(def, args)                                             \
1533         do {                                                                     \
1534         def = &arg[sizeof(args)-1];                                              \
1535         if (def[0] == '\0') {                                                    \
1536                 ++i;                                                                 \
1537                 if (i >= argc) {                                                     \
1538                         errorf(NULL, "expected argument after '" args "'"); \
1539                         argument_errors = true;                                          \
1540                         break;                                                           \
1541                 }                                                                    \
1542                 def = argv[i];                                                       \
1543                 if (def[0] == '-' && def[1] != '\0') {                               \
1544                         errorf(NULL, "expected argument after '" args "'"); \
1545                         argument_errors = true;                                          \
1546                         continue;                                                        \
1547                 }                                                                    \
1548         }                                                                        \
1549         } while (0)
1550
1551 #define SINGLE_OPTION(ch) (option[0] == (ch) && option[1] == '\0')
1552
1553         /* initialize this early because it has to parse options */
1554         gen_firm_init();
1555
1556         /* early options parsing (find out optimization level and OS) */
1557         for (int i = 1; i < argc; ++i) {
1558                 const char *arg = argv[i];
1559                 if (arg[0] != '-')
1560                         continue;
1561
1562                 const char *option = &arg[1];
1563                 if (option[0] == 'O') {
1564                         sscanf(&option[1], "%d", &opt_level);
1565                 }
1566         }
1567
1568         if (target_machine == NULL) {
1569                 target_machine = firm_get_host_machine();
1570         }
1571         choose_optimization_pack(opt_level);
1572         setup_target_machine();
1573
1574         /* parse rest of options */
1575         lang_standard_t         standard        = STANDARD_DEFAULT;
1576         compilation_unit_type_t forced_unittype = COMPILATION_UNIT_AUTODETECT;
1577         help_sections_t         help            = HELP_NONE;
1578         bool                    argument_errors = false;
1579         for (int i = 1; i < argc; ++i) {
1580                 const char *arg = argv[i];
1581                 if (arg[0] == '-' && arg[1] != '\0') {
1582                         /* an option */
1583                         const char *option = &arg[1];
1584                         if (option[0] == 'o') {
1585                                 GET_ARG_AFTER(outname, "-o");
1586                         } else if (option[0] == 'g') {
1587                                 /* TODO: parse -gX with 0<=x<=3... */
1588                                 set_be_option("debug=frameinfo");
1589                                 set_be_option("ia32-optcc=false");
1590                         } else if (SINGLE_OPTION('c')) {
1591                                 mode = CompileAssemble;
1592                         } else if (SINGLE_OPTION('E')) {
1593                                 mode = PreprocessOnly;
1594                         } else if (SINGLE_OPTION('s')) {
1595                                 add_flag(&ldflags_obst, "-s");
1596                         } else if (SINGLE_OPTION('S')) {
1597                                 mode = Compile;
1598                         } else if (option[0] == 'O') {
1599                                 continue;
1600                         } else if (option[0] == 'I') {
1601                                 const char *opt;
1602                                 GET_ARG_AFTER(opt, "-I");
1603                                 add_flag(&cppflags_obst, "-I%s", opt);
1604                                 append_include_path(&bracket_searchpath, opt);
1605                         } else if (option[0] == 'D') {
1606                                 const char *opt;
1607                                 GET_ARG_AFTER(opt, "-D");
1608                                 add_flag(&cppflags_obst, "-D%s", opt);
1609                         } else if (option[0] == 'U') {
1610                                 const char *opt;
1611                                 GET_ARG_AFTER(opt, "-U");
1612                                 add_flag(&cppflags_obst, "-U%s", opt);
1613                         } else if (option[0] == 'l') {
1614                                 const char *opt;
1615                                 GET_ARG_AFTER(opt, "-l");
1616                                 add_flag(&ldflags_obst, "-l%s", opt);
1617                         } else if (option[0] == 'L') {
1618                                 const char *opt;
1619                                 GET_ARG_AFTER(opt, "-L");
1620                                 add_flag(&ldflags_obst, "-L%s", opt);
1621                         } else if (SINGLE_OPTION('v')) {
1622                                 verbose = 1;
1623                         } else if (SINGLE_OPTION('w')) {
1624                                 add_flag(&cppflags_obst, "-w");
1625                                 disable_all_warnings();
1626                         } else if (option[0] == 'x') {
1627                                 const char *opt;
1628                                 GET_ARG_AFTER(opt, "-x");
1629                                 forced_unittype = get_unit_type_from_string(opt);
1630                                 if (forced_unittype == COMPILATION_UNIT_UNKNOWN) {
1631                                         errorf(NULL, "unknown language '%s'", opt);
1632                                         argument_errors = true;
1633                                 }
1634                         } else if (streq(option, "M")) {
1635                                 mode = PreprocessOnly;
1636                                 add_flag(&cppflags_obst, "-M");
1637                         } else if (streq(option, "MMD") ||
1638                                    streq(option, "MD")) {
1639                             construct_dep_target = true;
1640                                 add_flag(&cppflags_obst, "-%s", option);
1641                         } else if (streq(option, "MM")  ||
1642                                    streq(option, "MP")) {
1643                                 add_flag(&cppflags_obst, "-%s", option);
1644                         } else if (streq(option, "MT") ||
1645                                    streq(option, "MQ") ||
1646                                    streq(option, "MF")) {
1647                                 const char *opt;
1648                                 GET_ARG_AFTER(opt, "-MT");
1649                                 add_flag(&cppflags_obst, "-%s", option);
1650                                 add_flag(&cppflags_obst, "%s", opt);
1651                         } else if (streq(option, "include")) {
1652                                 const char *opt;
1653                                 GET_ARG_AFTER(opt, "-include");
1654                                 add_flag(&cppflags_obst, "-include");
1655                                 add_flag(&cppflags_obst, "%s", opt);
1656                         } else if (streq(option, "idirafter")) {
1657                                 const char *opt;
1658                                 GET_ARG_AFTER(opt, "-idirafter");
1659                                 add_flag(&cppflags_obst, "-idirafter");
1660                                 add_flag(&cppflags_obst, "%s", opt);
1661                                 append_include_path(&after_searchpath, opt);
1662                         } else if (streq(option, "isystem")) {
1663                                 const char *opt;
1664                                 GET_ARG_AFTER(opt, "-isystem");
1665                                 add_flag(&cppflags_obst, "-isystem");
1666                                 add_flag(&cppflags_obst, "%s", opt);
1667                                 append_include_path(&system_searchpath, opt);
1668                         } else if (streq(option, "iquote")) {
1669                                 const char *opt;
1670                                 GET_ARG_AFTER(opt, "-iquote");
1671                                 add_flag(&cppflags_obst, "-iquote");
1672                                 add_flag(&cppflags_obst, "%s", opt);
1673                                 append_include_path(&quote_searchpath, opt);
1674                         } else if (streq(option, "pthread")) {
1675                                 /* set flags for the preprocessor */
1676                                 add_flag(&cppflags_obst, "-D_REENTRANT");
1677                                 /* set flags for the linker */
1678                                 add_flag(&ldflags_obst, "-lpthread");
1679                         } else if (streq(option, "nostdinc")
1680                                         || streq(option, "trigraphs")) {
1681                                 /* pass these through to the preprocessor */
1682                                 add_flag(&cppflags_obst, "%s", arg);
1683                         } else if (streq(option, "pipe")) {
1684                                 /* here for gcc compatibility */
1685                         } else if (streq(option, "static")) {
1686                                 add_flag(&ldflags_obst, "-static");
1687                         } else if (streq(option, "shared")) {
1688                                 add_flag(&ldflags_obst, "-shared");
1689                         } else if (option[0] == 'f') {
1690                                 char const *orig_opt;
1691                                 GET_ARG_AFTER(orig_opt, "-f");
1692
1693                                 if (strstart(orig_opt, "input-charset=")) {
1694                                         char const* const encoding = strchr(orig_opt, '=') + 1;
1695                                         input_encoding = encoding;
1696                                 } else if (strstart(orig_opt, "align-loops=") ||
1697                                            strstart(orig_opt, "align-jumps=") ||
1698                                            strstart(orig_opt, "align-functions=")) {
1699                                         fprintf(stderr, "ignoring gcc option '-f%s'\n", orig_opt);
1700                                 } else if (strstart(orig_opt, "visibility=")) {
1701                                         const char *val = strchr(orig_opt, '=')+1;
1702                                         elf_visibility_tag_t visibility
1703                                                 = get_elf_visibility_from_string(val);
1704                                         if (visibility == ELF_VISIBILITY_ERROR) {
1705                                                 errorf(NULL, "invalid visibility '%s' specified", val);
1706                                                 argument_errors = true;
1707                                         } else {
1708                                                 set_default_visibility(visibility);
1709                                         }
1710                                 } else if (strstart(orig_opt, "message-length=")) {
1711                                         /* ignore: would only affect error message format */
1712                                 } else if (streq(orig_opt, "fast-math") ||
1713                                            streq(orig_opt, "fp-fast")) {
1714                                         firm_fp_model = fp_model_fast;
1715                                 } else if (streq(orig_opt, "fp-precise")) {
1716                                         firm_fp_model = fp_model_precise;
1717                                 } else if (streq(orig_opt, "fp-strict")) {
1718                                         firm_fp_model = fp_model_strict;
1719                                 } else if (streq(orig_opt, "help")) {
1720                                         fprintf(stderr, "warning: -fhelp is deprecated\n");
1721                                         help |= HELP_OPTIMIZATION;
1722                                 } else {
1723                                         /* -f options which have an -fno- variant */
1724                                         char const *opt         = orig_opt;
1725                                         bool        truth_value = true;
1726                                         if (opt[0] == 'n' && opt[1] == 'o' && opt[2] == '-') {
1727                                                 truth_value = false;
1728                                                 opt += 3;
1729                                         }
1730
1731                                         if (streq(opt, "diagnostics-show-option")) {
1732                                                 diagnostics_show_option = truth_value;
1733                                         } else if (streq(opt, "dollars-in-identifiers")) {
1734                                                 allow_dollar_in_symbol = truth_value;
1735                                         } else if (streq(opt, "omit-frame-pointer")) {
1736                                                 set_be_option(truth_value ? "omitfp" : "omitfp=no");
1737                                         } else if (streq(opt, "short-wchar")) {
1738                                                 wchar_atomic_kind = truth_value ? ATOMIC_TYPE_USHORT
1739                                                         : ATOMIC_TYPE_INT;
1740                                         } else if (streq(opt, "show-column")) {
1741                                                 show_column = truth_value;
1742                                         } else if (streq(opt, "signed-char")) {
1743                                                 char_is_signed = truth_value;
1744                                         } else if (streq(opt, "strength-reduce")) {
1745                                                 /* does nothing, for gcc compatibility (even gcc does
1746                                                  * nothing for this switch anymore) */
1747                                         } else if (streq(opt, "syntax-only")) {
1748                                                 mode = truth_value ? ParseOnly : CompileAssembleLink;
1749                                         } else if (streq(opt, "unsigned-char")) {
1750                                                 char_is_signed = !truth_value;
1751                                         } else if (streq(opt, "freestanding")) {
1752                                                 freestanding = truth_value;
1753                                         } else if (streq(opt, "hosted")) {
1754                                                 freestanding = !truth_value;
1755                                         } else if (streq(opt, "profile-generate")) {
1756                                                 profile_generate = truth_value;
1757                                         } else if (streq(opt, "profile-use")) {
1758                                                 profile_use = truth_value;
1759                                         } else if (!truth_value &&
1760                                                    streq(opt, "asynchronous-unwind-tables")) {
1761                                             /* nothing todo, a gcc feature which we do not support
1762                                              * anyway was deactivated */
1763                                         } else if (streq(opt, "verbose-asm")) {
1764                                                 /* ignore: we always print verbose assembler */
1765                                         } else if (streq(opt, "jump-tables")             ||
1766                                                    streq(opt, "expensive-optimizations") ||
1767                                                    streq(opt, "common")                  ||
1768                                                    streq(opt, "optimize-sibling-calls")  ||
1769                                                    streq(opt, "align-loops")             ||
1770                                                    streq(opt, "align-jumps")             ||
1771                                                    streq(opt, "align-functions")         ||
1772                                                    streq(opt, "PIC")                     ||
1773                                                    streq(opt, "stack-protector")         ||
1774                                                    streq(opt, "stack-protector-all")) {
1775                                                 fprintf(stderr, "ignoring gcc option '-f%s'\n", orig_opt);
1776                                         } else {
1777                                                 if (firm_option(orig_opt) == 0) {
1778                                                         errorf(NULL, "unknown Firm option '-f%s'", orig_opt);
1779                                                         argument_errors = true;
1780                                                         continue;
1781                                                 }
1782                                         }
1783                                 }
1784                         } else if (option[0] == 'b') {
1785                                 const char *opt;
1786                                 GET_ARG_AFTER(opt, "-b");
1787
1788                                 if (streq(opt, "help")) {
1789                                         fprintf(stderr, "warning: -bhelp is deprecated (use --help-firm)\n");
1790                                         help |= HELP_FIRM;
1791                                 } else {
1792                                         if (be_parse_arg(opt) == 0) {
1793                                                 errorf(NULL, "unknown Firm backend option '-b %s'", opt);
1794                                                 argument_errors = true;
1795                                         } else if (strstart(opt, "isa=")) {
1796                                                 strncpy(cpu_arch, opt, sizeof(cpu_arch));
1797                                         }
1798                                 }
1799                         } else if (option[0] == 'W') {
1800                                 if (strstart(option + 1, "a,")) {
1801                                         const char *opt;
1802                                         GET_ARG_AFTER(opt, "-Wa,");
1803                                         add_flag(&asflags_obst, "-Wa,%s", opt);
1804                                 } else if (strstart(option + 1, "p,")) {
1805                                         // pass options directly to the preprocessor
1806                                         const char *opt;
1807                                         GET_ARG_AFTER(opt, "-Wp,");
1808                                         add_flag(&cppflags_obst, "-Wp,%s", opt);
1809                                 } else if (strstart(option + 1, "l,")) {
1810                                         // pass options directly to the linker
1811                                         const char *opt;
1812                                         GET_ARG_AFTER(opt, "-Wl,");
1813                                         add_flag(&ldflags_obst, "-Wl,%s", opt);
1814                                 } else if (streq(option + 1, "no-trigraphs")
1815                                                         || streq(option + 1, "undef")
1816                                                         || streq(option + 1, "missing-include-dirs")
1817                                                         || streq(option + 1, "endif-labels")) {
1818                                         add_flag(&cppflags_obst, "%s", arg);
1819                                 } else if (streq(option+1, "init-self")) {
1820                                         /* ignored (same as gcc does) */
1821                                 } else if (streq(option+1, "format-y2k")
1822                                            || streq(option+1, "format-security")
1823                                            || streq(option+1, "old-style-declaration")
1824                                            || streq(option+1, "type-limits")) {
1825                                     /* ignore (gcc compatibility) */
1826                                 } else {
1827                                         set_warning_opt(&option[1]);
1828                                 }
1829                         } else if (option[0] == 'm') {
1830                                 /* -m options */
1831                                 const char *opt;
1832                                 char arch_opt[64];
1833
1834                                 GET_ARG_AFTER(opt, "-m");
1835                                 if (strstart(opt, "target=")) {
1836                                         GET_ARG_AFTER(opt, "-mtarget=");
1837                                         if (!parse_target_triple(opt)) {
1838                                                 argument_errors = true;
1839                                         } else {
1840                                                 const char *isa = setup_target_machine();
1841                                                 strncpy(cpu_arch, isa, sizeof(cpu_arch));
1842                                                 target_triple = opt;
1843                                         }
1844                                 } else if (strstart(opt, "triple=")) {
1845                                         GET_ARG_AFTER(opt, "-mtriple=");
1846                                         if (!parse_target_triple(opt)) {
1847                                                 argument_errors = true;
1848                                         } else {
1849                                                 const char *isa = setup_target_machine();
1850                                                 strncpy(cpu_arch, isa, sizeof(cpu_arch));
1851                                                 target_triple = opt;
1852                                         }
1853                                 } else if (strstart(opt, "arch=")) {
1854                                         GET_ARG_AFTER(opt, "-march=");
1855                                         snprintf(arch_opt, sizeof(arch_opt), "%s-arch=%s", cpu_arch, opt);
1856                                         int res = be_parse_arg(arch_opt);
1857                                         snprintf(arch_opt, sizeof(arch_opt), "%s-opt=%s", cpu_arch, opt);
1858                                         res &= be_parse_arg(arch_opt);
1859
1860                                         if (res == 0) {
1861                                                 errorf(NULL, "unknown architecture '%s'", arch_opt);
1862                                                 argument_errors = true;
1863                                         }
1864                                 } else if (strstart(opt, "tune=")) {
1865                                         GET_ARG_AFTER(opt, "-mtune=");
1866                                         snprintf(arch_opt, sizeof(arch_opt), "%s-opt=%s", cpu_arch, opt);
1867                                         if (be_parse_arg(arch_opt) == 0)
1868                                                 argument_errors = true;
1869                                 } else if (strstart(opt, "cpu=")) {
1870                                         GET_ARG_AFTER(opt, "-mcpu=");
1871                                         snprintf(arch_opt, sizeof(arch_opt), "%s-arch=%s", cpu_arch, opt);
1872                                         if (be_parse_arg(arch_opt) == 0)
1873                                                 argument_errors = true;
1874                                 } else if (strstart(opt, "fpmath=")) {
1875                                         GET_ARG_AFTER(opt, "-mfpmath=");
1876                                         if (streq(opt, "387"))
1877                                                 opt = "x87";
1878                                         else if (streq(opt, "sse"))
1879                                                 opt = "sse2";
1880                                         else {
1881                                                 errorf(NULL, "option -mfpmath supports only 387 or sse");
1882                                                 argument_errors = true;
1883                                         }
1884                                         if (!argument_errors) {
1885                                                 snprintf(arch_opt, sizeof(arch_opt), "%s-fpunit=%s", cpu_arch, opt);
1886                                                 if (be_parse_arg(arch_opt) == 0)
1887                                                         argument_errors = true;
1888                                         }
1889                                 } else if (strstart(opt, "preferred-stack-boundary=")) {
1890                                         GET_ARG_AFTER(opt, "-mpreferred-stack-boundary=");
1891                                         snprintf(arch_opt, sizeof(arch_opt), "%s-stackalign=%s", cpu_arch, opt);
1892                                         if (be_parse_arg(arch_opt) == 0)
1893                                                 argument_errors = true;
1894                                 } else if (streq(opt, "rtd")) {
1895                                         default_calling_convention = CC_STDCALL;
1896                                 } else if (strstart(opt, "regparm=")) {
1897                                         errorf(NULL, "regparm convention not supported yet");
1898                                         argument_errors = true;
1899                                 } else if (streq(opt, "soft-float")) {
1900                                         add_flag(&ldflags_obst, "-msoft-float");
1901                                         snprintf(arch_opt, sizeof(arch_opt), "%s-fpunit=softfloat", cpu_arch);
1902                                         if (be_parse_arg(arch_opt) == 0)
1903                                                 argument_errors = true;
1904                                 } else if (streq(opt, "sse2")) {
1905                                         /* ignore for now, our x86 backend always uses sse when
1906                                          * sse is requested */
1907                                 } else {
1908                                         long int value = strtol(opt, NULL, 10);
1909                                         if (value == 0) {
1910                                                 errorf(NULL, "wrong option '-m %s'",  opt);
1911                                                 argument_errors = true;
1912                                         } else if (value != 16 && value != 32 && value != 64) {
1913                                                 errorf(NULL, "option -m supports only 16, 32 or 64");
1914                                                 argument_errors = true;
1915                                         } else {
1916                                                 unsigned machine_size = (unsigned)value;
1917                                                 /* TODO: choose/change backend based on this */
1918                                                 add_flag(&cppflags_obst, "-m%u", machine_size);
1919                                                 add_flag(&asflags_obst, "-m%u", machine_size);
1920                                                 add_flag(&ldflags_obst, "-m%u", machine_size);
1921                                         }
1922                                 }
1923                         } else if (option[0] == 'X') {
1924                                 if (streq(option + 1, "assembler")) {
1925                                         const char *opt;
1926                                         GET_ARG_AFTER(opt, "-Xassembler");
1927                                         add_flag(&asflags_obst, "-Xassembler");
1928                                         add_flag(&asflags_obst, opt);
1929                                 } else if (streq(option + 1, "preprocessor")) {
1930                                         const char *opt;
1931                                         GET_ARG_AFTER(opt, "-Xpreprocessor");
1932                                         add_flag(&cppflags_obst, "-Xpreprocessor");
1933                                         add_flag(&cppflags_obst, opt);
1934                                 } else if (streq(option + 1, "linker")) {
1935                                         const char *opt;
1936                                         GET_ARG_AFTER(opt, "-Xlinker");
1937                                         add_flag(&ldflags_obst, "-Xlinker");
1938                                         add_flag(&ldflags_obst, opt);
1939                                 }
1940                         } else if (streq(option, "pg")) {
1941                                 set_be_option("gprof");
1942                                 add_flag(&ldflags_obst, "-pg");
1943                         } else if (streq(option, "ansi")) {
1944                                 standard = STANDARD_ANSI;
1945                         } else if (streq(option, "pedantic")) {
1946                                 fprintf(stderr, "warning: ignoring gcc option '%s'\n", arg);
1947                         } else if (strstart(option, "std=")) {
1948                                 const char *const o = &option[4];
1949                                 standard =
1950                                         streq(o, "c++")            ? STANDARD_CXX98   :
1951                                         streq(o, "c++98")          ? STANDARD_CXX98   :
1952                                         streq(o, "c11")            ? STANDARD_C11     :
1953                                         streq(o, "c1x")            ? STANDARD_C11     : // deprecated
1954                                         streq(o, "c89")            ? STANDARD_C89     :
1955                                         streq(o, "c90")            ? STANDARD_C89     :
1956                                         streq(o, "c99")            ? STANDARD_C99     :
1957                                         streq(o, "c9x")            ? STANDARD_C99     : // deprecated
1958                                         streq(o, "gnu++98")        ? STANDARD_GNUXX98 :
1959                                         streq(o, "gnu11")          ? STANDARD_GNU11   :
1960                                         streq(o, "gnu1x")          ? STANDARD_GNU11   : // deprecated
1961                                         streq(o, "gnu89")          ? STANDARD_GNU89   :
1962                                         streq(o, "gnu99")          ? STANDARD_GNU99   :
1963                                         streq(o, "gnu9x")          ? STANDARD_GNU99   : // deprecated
1964                                         streq(o, "iso9899:1990")   ? STANDARD_C89     :
1965                                         streq(o, "iso9899:199409") ? STANDARD_C89AMD1 :
1966                                         streq(o, "iso9899:1999")   ? STANDARD_C99     :
1967                                         streq(o, "iso9899:199x")   ? STANDARD_C99     : // deprecated
1968                                         streq(o, "iso9899:2011")   ? STANDARD_C11     :
1969                                         (fprintf(stderr, "warning: ignoring gcc option '%s'\n", arg), standard);
1970                         } else if (streq(option, "version")) {
1971                                 print_cparser_version();
1972                                 return EXIT_SUCCESS;
1973                         } else if (streq(option, "dumpversion")) {
1974                                 /* gcc compatibility option */
1975                                 print_cparser_version_short();
1976                                 return EXIT_SUCCESS;
1977                         } else if (strstart(option, "print-file-name=")) {
1978                                 GET_ARG_AFTER(print_file_name_file, "-print-file-name=");
1979                         } else if (option[0] == '-') {
1980                                 /* double dash option */
1981                                 ++option;
1982                                 if (streq(option, "gcc")) {
1983                                         features_on  |=  _GNUC;
1984                                         features_off &= ~_GNUC;
1985                                 } else if (streq(option, "no-gcc")) {
1986                                         features_on  &= ~_GNUC;
1987                                         features_off |=  _GNUC;
1988                                 } else if (streq(option, "ms")) {
1989                                         features_on  |=  _MS;
1990                                         features_off &= ~_MS;
1991                                 } else if (streq(option, "no-ms")) {
1992                                         features_on  &= ~_MS;
1993                                         features_off |=  _MS;
1994                                 } else if (streq(option, "strict")) {
1995                                         strict_mode = true;
1996                                 } else if (streq(option, "benchmark")) {
1997                                         mode = BenchmarkParser;
1998                                 } else if (streq(option, "print-ast")) {
1999                                         mode = PrintAst;
2000                                 } else if (streq(option, "print-implicit-cast")) {
2001                                         print_implicit_casts = true;
2002                                 } else if (streq(option, "print-parenthesis")) {
2003                                         print_parenthesis = true;
2004                                 } else if (streq(option, "print-fluffy")) {
2005                                         mode = PrintFluffy;
2006                                 } else if (streq(option, "print-compound-sizes")) {
2007                                         mode = PrintCompoundSizes;
2008                                 } else if (streq(option, "print-jna")) {
2009                                         mode = PrintJna;
2010                                 } else if (streq(option, "jna-limit")) {
2011                                         ++i;
2012                                         if (i >= argc) {
2013                                                 errorf(NULL, "expected argument after '--jna-limit'");
2014                                                 argument_errors = true;
2015                                                 break;
2016                                         }
2017                                         jna_limit_output(argv[i]);
2018                                 } else if (streq(option, "jna-libname")) {
2019                                         ++i;
2020                                         if (i >= argc) {
2021                                                 errorf(NULL, "expected argument after '--jna-libname'");
2022                                                 argument_errors = true;
2023                                                 break;
2024                                         }
2025                                         jna_set_libname(argv[i]);
2026                                 } else if (streq(option, "external-pp")) {
2027                                         if (i+1 < argc && argv[i+1][0] != '-') {
2028                                                 ++i;
2029                                                 external_preprocessor = argv[i+1];
2030                                         } else {
2031                                                 external_preprocessor = PREPROCESSOR;
2032                                         }
2033                                 } else if (streq(option, "no-external-pp")) {
2034                                         external_preprocessor = NULL;
2035                                 } else if (streq(option, "time")) {
2036                                         do_timing    = true;
2037                                         print_timing = true;
2038                                 } else if (streq(option, "statev")) {
2039                                         do_timing      = true;
2040                                         produce_statev = true;
2041                                 } else if (strstart(option, "filtev=")) {
2042                                         GET_ARG_AFTER(filtev, "--filtev=");
2043                                 } else if (streq(option, "version")) {
2044                                         print_cparser_version();
2045                                         return EXIT_SUCCESS;
2046                                 } else if (streq(option, "help")) {
2047                                         help |= HELP_BASIC;
2048                                 } else if (streq(option, "help-parser")) {
2049                                         help |= HELP_PARSER;
2050                                 } else if (streq(option, "help-warnings")) {
2051                                         help |= HELP_WARNINGS;
2052                                 } else if (streq(option, "help-codegen")) {
2053                                         help |= HELP_CODEGEN;
2054                                 } else if (streq(option, "help-linker")) {
2055                                         help |= HELP_LINKER;
2056                                 } else if (streq(option, "help-optimization")) {
2057                                         help |= HELP_OPTIMIZATION;
2058                                 } else if (streq(option, "help-language-tools")) {
2059                                         help |= HELP_LANGUAGETOOLS;
2060                                 } else if (streq(option, "help-debug")) {
2061                                         help |= HELP_DEBUG;
2062                                 } else if (streq(option, "help-firm")) {
2063                                         help |= HELP_FIRM;
2064                                 } else if (streq(option, "help-all")) {
2065                                         help |= HELP_ALL;
2066                                 } else if (streq(option, "dump-function")) {
2067                                         ++i;
2068                                         if (i >= argc) {
2069                                                 errorf(NULL, "expected argument after '--dump-function'");
2070                                                 argument_errors = true;
2071                                                 break;
2072                                         }
2073                                         dumpfunction = argv[i];
2074                                         mode         = CompileDump;
2075                                 } else if (streq(option, "export-ir")) {
2076                                         mode = CompileExportIR;
2077                                 } else if (streq(option, "unroll-loops")) {
2078                                         /* ignore (gcc compatibility) */
2079                                 } else {
2080                                         errorf(NULL, "unknown argument '%s'", arg);
2081                                         argument_errors = true;
2082                                 }
2083                         } else {
2084                                 errorf(NULL, "unknown argument '%s'", arg);
2085                                 argument_errors = true;
2086                         }
2087                 } else {
2088                         compilation_unit_type_t type = forced_unittype;
2089                         if (type == COMPILATION_UNIT_AUTODETECT) {
2090                                 if (streq(arg, "-")) {
2091                                         /* - implicitly means C source file */
2092                                         type = COMPILATION_UNIT_C;
2093                                 } else {
2094                                         const char *suffix = strrchr(arg, '.');
2095                                         /* Ensure there is at least one char before the suffix */
2096                                         if (suffix != NULL && suffix != arg) {
2097                                                 ++suffix;
2098                                                 type =
2099                                                         streq(suffix, "S")   ? COMPILATION_UNIT_ASSEMBLER              :
2100                                                         streq(suffix, "a")   ? COMPILATION_UNIT_OBJECT                 :
2101                                                         streq(suffix, "c")   ? COMPILATION_UNIT_C                      :
2102                                                         streq(suffix, "i")   ? COMPILATION_UNIT_PREPROCESSED_C         :
2103                                                         streq(suffix, "C")   ? COMPILATION_UNIT_CXX                    :
2104                                                         streq(suffix, "cc")  ? COMPILATION_UNIT_CXX                    :
2105                                                         streq(suffix, "cp")  ? COMPILATION_UNIT_CXX                    :
2106                                                         streq(suffix, "cpp") ? COMPILATION_UNIT_CXX                    :
2107                                                         streq(suffix, "CPP") ? COMPILATION_UNIT_CXX                    :
2108                                                         streq(suffix, "cxx") ? COMPILATION_UNIT_CXX                    :
2109                                                         streq(suffix, "c++") ? COMPILATION_UNIT_CXX                    :
2110                                                         streq(suffix, "ii")  ? COMPILATION_UNIT_PREPROCESSED_CXX       :
2111                                                         streq(suffix, "h")   ? COMPILATION_UNIT_C                      :
2112                                                         streq(suffix, "ir")  ? COMPILATION_UNIT_IR                     :
2113                                                         streq(suffix, "o")   ? COMPILATION_UNIT_OBJECT                 :
2114                                                         streq(suffix, "s")   ? COMPILATION_UNIT_PREPROCESSED_ASSEMBLER :
2115                                                         streq(suffix, "so")  ? COMPILATION_UNIT_OBJECT                 :
2116                                                         COMPILATION_UNIT_OBJECT; /* gcc behavior: unknown file extension means object file */
2117                                         }
2118                                 }
2119                         }
2120
2121                         compilation_unit_t *entry = OALLOCZ(&file_obst, compilation_unit_t);
2122                         entry->name = arg;
2123                         entry->type = type;
2124
2125                         if (last_unit != NULL) {
2126                                 last_unit->next = entry;
2127                         } else {
2128                                 units = entry;
2129                         }
2130                         last_unit = entry;
2131                 }
2132         }
2133
2134         if (help != HELP_NONE) {
2135                 print_help(argv[0], help);
2136                 return !argument_errors;
2137         }
2138
2139         if (print_file_name_file != NULL) {
2140                 print_file_name(print_file_name_file);
2141                 return EXIT_SUCCESS;
2142         }
2143         if (units == NULL) {
2144                 errorf(NULL, "no input files specified");
2145                 argument_errors = true;
2146         }
2147
2148         if (argument_errors) {
2149                 usage(argv[0]);
2150                 return EXIT_FAILURE;
2151         }
2152
2153         /* apply some effects from switches */
2154         c_mode |= features_on;
2155         c_mode &= ~features_off;
2156         if (profile_generate) {
2157                 add_flag(&ldflags_obst, "-lfirmprof");
2158                 set_be_option("profilegenerate");
2159         }
2160         if (profile_use) {
2161                 set_be_option("profileuse");
2162         }
2163
2164         init_symbol_table();
2165         init_types_and_adjust();
2166         init_typehash();
2167         init_basic_types();
2168         if (c_mode & _CXX) {
2169                 init_wchar_types(ATOMIC_TYPE_WCHAR_T);
2170         } else {
2171                 init_wchar_types(wchar_atomic_kind);
2172         }
2173         init_preprocessor();
2174         init_ast();
2175         init_parser();
2176         init_ast2firm();
2177         init_mangle();
2178
2179         if (do_timing)
2180                 timer_init();
2181
2182         char outnamebuf[4096];
2183         if (outname == NULL) {
2184                 const char *filename = units->name;
2185
2186                 switch (mode) {
2187                 case BenchmarkParser:
2188                 case PrintAst:
2189                 case PrintFluffy:
2190                 case PrintJna:
2191                 case PrintCompoundSizes:
2192                 case PreprocessOnly:
2193                 case ParseOnly:
2194                         outname = "-";
2195                         break;
2196                 case Compile:
2197                         get_output_name(outnamebuf, sizeof(outnamebuf), filename, ".s");
2198                         outname = outnamebuf;
2199                         break;
2200                 case CompileAssemble:
2201                         get_output_name(outnamebuf, sizeof(outnamebuf), filename, ".o");
2202                         outname = outnamebuf;
2203                         break;
2204                 case CompileDump:
2205                         get_output_name(outnamebuf, sizeof(outnamebuf), dumpfunction,
2206                                         ".vcg");
2207                         outname = outnamebuf;
2208                         break;
2209                 case CompileExportIR:
2210                         get_output_name(outnamebuf, sizeof(outnamebuf), filename, ".ir");
2211                         outname = outnamebuf;
2212                         break;
2213                 case CompileAssembleLink:
2214                         if (firm_is_windows_os(target_machine)) {
2215                                 outname = "a.exe";
2216                         } else {
2217                                 outname = "a.out";
2218                         }
2219                         break;
2220                 }
2221         }
2222
2223         assert(outname != NULL);
2224
2225         FILE *out;
2226         if (streq(outname, "-")) {
2227                 out = stdout;
2228         } else {
2229                 out = fopen(outname, "w");
2230                 if (out == NULL) {
2231                         position_t const pos = { outname, 0, 0, 0 };
2232                         errorf(&pos, "could not open for writing: %s", strerror(errno));
2233                         return EXIT_FAILURE;
2234                 }
2235         }
2236
2237         if (produce_statev && units != NULL) {
2238                 /* attempt to guess a good name for the file */
2239                 const char *first_cup = units->name;
2240                 if (first_cup != NULL) {
2241                         const char *dot = strrchr(first_cup, '.');
2242                         const char *pos = dot ? dot : first_cup + strlen(first_cup);
2243                         char        buf[pos-first_cup+1];
2244                         strncpy(buf, first_cup, pos-first_cup);
2245                         buf[pos-first_cup] = '\0';
2246
2247                         stat_ev_begin(buf, filtev);
2248                 }
2249         }
2250
2251         int result = compilation_loop(mode, units, standard, out);
2252         if (stat_ev_enabled) {
2253                 stat_ev_end();
2254         }
2255
2256         if (result != EXIT_SUCCESS) {
2257                 if (out != stdout)
2258                         unlink(outname);
2259                 return result;
2260         }
2261
2262         /* link program file */
2263         if (mode == CompileAssembleLink) {
2264                 int const link_result = link_program(units);
2265                 if (link_result != EXIT_SUCCESS) {
2266                         if (out != stdout)
2267                                 unlink(outname);
2268                         return link_result;
2269                 }
2270         }
2271
2272         if (do_timing)
2273                 timer_term(print_timing ? stderr : NULL);
2274
2275         free_temp_files();
2276         obstack_free(&cppflags_obst, NULL);
2277         obstack_free(&ldflags_obst, NULL);
2278         obstack_free(&asflags_obst, NULL);
2279         obstack_free(&file_obst, NULL);
2280
2281         gen_firm_finish();
2282         exit_mangle();
2283         exit_ast2firm();
2284         exit_parser();
2285         exit_ast();
2286         exit_preprocessor();
2287         exit_typehash();
2288         exit_types();
2289         exit_tokens();
2290         exit_symbol_table();
2291         return EXIT_SUCCESS;
2292 }