nsz Git - cparser/blob - main.c

   1 #include <config.h>
   2
   3 #define _GNU_SOURCE
   4
   5 #include <stdio.h>
   6 #include <stdlib.h>
   7 #include <stdbool.h>
   8 #include <errno.h>
   9 #include <string.h>
  10 #include <unistd.h>
  11 #include <assert.h>
  12
  13 #ifndef WITH_LIBCORE
  14 #define WITH_LIBCORE
  15 #endif
  16
  17 #include <libfirm/firm.h>
  18 #include <libfirm/be.h>
  19
  20 #include "lexer.h"
  21 #include "token_t.h"
  22 #include "type_hash.h"
  23 #include "parser.h"
  24 #include "ast2firm.h"
  25 #include "adt/error.h"
  26 #include "write_fluffy.h"
  27
  28 #ifndef PREPROCESSOR
  29 #define PREPROCESSOR "cpp -std=c99 -U__WCHAR_TYPE__ -D__WCHAR_TYPE__=int"
  30 #endif
  31
  32 #ifndef LINKER
  33 #define LINKER       "gcc"
  34 #endif
  35
  36 #ifndef ASSEMBLER
  37 #define ASSEMBLER "as"
  38 #endif
  39
  40 #ifdef _WIN32
  41 /* remap some names */
  42 #define popen(cmd, mode)  _popen(cmd, mode)
  43 #define pclose(file)      _pclose(file)
  44 #endif /* _WIN32 */
  45
  46 static int  verbose;
  47 static bool do_dump;
  48
  49 static const ir_settings_if_conv_t *if_conv_info = NULL;
  50 static const backend_params        *be_params    = NULL;
  51
  52 static void initialize_firm(void)
  53 {
  54         be_opt_register();
  55         firm_init_options(NULL, 0, NULL);
  56
  57         firm_parameter_t params;
  58         memset(&params, 0, sizeof(params));
  59
  60         params.size = sizeof(params);
  61         params.enable_statistics = 0;
  62         params.initialize_local_func = uninitialized_local_var;
  63         params.cc_mask = 0;
  64         params.builtin_dbg = NULL;
  65
  66         /* initialize backend */
  67         be_params = be_init();
  68         ir_set_debug_retrieve(retrieve_dbg);
  69         params.arch_op_settings = be_params->arch_op_settings;
  70         if_conv_info            = be_params->if_conv_info;
  71
  72         (void) if_conv_info; /* avoid unused warning */
  73
  74         /* intialize firm itself */
  75         init_firm(&params);
  76         dbg_init(NULL, NULL, dbg_snprint);
  77
  78         set_opt_constant_folding(1);
  79         set_opt_unreachable_code(1);
  80         set_opt_control_flow_straightening(1);
  81         set_opt_control_flow_weak_simplification(1);
  82         set_opt_control_flow_strong_simplification(1);
  83         set_opt_dyn_meth_dispatch(1);
  84         set_opt_normalize(1);
  85         set_opt_precise_exc_context(0);
  86         set_opt_strength_red(0);
  87         set_opt_fragile_ops(0);
  88         set_opt_optimize_class_casts(0);
  89         set_opt_suppress_downcast_optimization(0);
  90         set_opt_remove_confirm(1);
  91         set_opt_scalar_replacement(1);
  92         set_opt_ldst_only_null_ptr_exceptions(1);
  93         set_opt_alias_analysis(1);
  94
  95         dump_consts_local(1);
  96         dump_keepalive_edges(1);
  97 }
  98
  99 static void dump(ir_graph *irg, const char *suffix)
 100 {
 101         if(do_dump) {
 102                 dump_ir_block_graph(irg, suffix);
 103         }
 104 }
 105
 106 static void get_output_name(char *buf, size_t buflen, const char *inputname,
 107                             const char *newext)
 108 {
 109         size_t last_dot = 0xffffffff;
 110         size_t i = 0;
 111
 112         if(inputname == NULL) {
 113                 snprintf(buf, buflen, "a%s", newext);
 114                 return;
 115         }
 116
 117         for(const char *c = inputname; *c != 0; ++c) {
 118                 if(*c == '.')
 119                         last_dot = i;
 120                 ++i;
 121         }
 122         if(last_dot == 0xffffffff)
 123                 last_dot = i;
 124
 125         if(last_dot >= buflen)
 126                 panic("filename too long");
 127         memcpy(buf, inputname, last_dot);
 128
 129         size_t extlen = strlen(newext) + 1;
 130         if(extlen + last_dot >= buflen)
 131                 panic("filename too long");
 132         memcpy(buf+last_dot, newext, extlen);
 133 }
 134
 135 static translation_unit_t *do_parsing(FILE *const in, const char *const input)
 136 {
 137         lexer_open_stream(in, input);
 138         translation_unit_t *unit = parse();
 139         return unit;
 140 }
 141
 142 static void lextest(FILE *in, const char *fname)
 143 {
 144         lexer_open_stream(in, fname);
 145
 146         do {
 147                 lexer_next_preprocessing_token();
 148                 print_token(stdout, &lexer_token);
 149                 puts("");
 150         } while(lexer_token.type != T_EOF);
 151 }
 152
 153 static void emit(FILE *out, const char *input_name)
 154 {
 155         be_main(out, input_name);
 156 }
 157
 158 static FILE* preprocess(FILE* in, const char *fname)
 159 {
 160         char buf[4096];
 161
 162         if(in != stdin) {
 163                 snprintf(buf, sizeof(buf), PREPROCESSOR " %s", fname);
 164         } else {
 165                 /* read from stdin */
 166                 snprintf(buf, sizeof(buf), PREPROCESSOR " -");
 167         }
 168
 169         if(verbose) {
 170                 puts(buf);
 171         }
 172         FILE* f = popen(buf, "r");
 173         if (f == NULL) {
 174                 fprintf(stderr, "invoking preprocessor failed\n");
 175                 exit(1);
 176         }
 177         return f;
 178 }
 179
 180 static void do_link(const char *out, const char *in)
 181 {
 182         char buf[4096];
 183
 184         snprintf(buf, sizeof(buf), "%s %s -o %s", LINKER, in, out);
 185         if(verbose) {
 186                 puts(buf);
 187         }
 188         int err = system(buf);
 189         if(err != 0) {
 190                 fprintf(stderr, "linker reported an error\n");
 191                 exit(1);
 192         }
 193 }
 194
 195 static void assemble(const char *out, const char *in)
 196 {
 197         char buf[4096];
 198
 199         snprintf(buf, sizeof(buf), "%s %s -o %s", ASSEMBLER, in, out);
 200         if(verbose) {
 201                 puts(buf);
 202         }
 203
 204         int err = system(buf);
 205         if(err != 0) {
 206                 fprintf(stderr, "assembler reported an error\n");
 207                 exit(1);
 208         }
 209 }
 210
 211 static const char *try_dir(const char *dir)
 212 {
 213         if(dir == NULL)
 214                 return dir;
 215         if(access(dir, R_OK | W_OK | X_OK) == 0)
 216                 return dir;
 217         return NULL;
 218 }
 219
 220 static const char *get_tempdir(void)
 221 {
 222         static const char *tmpdir = NULL;
 223
 224         if(tmpdir != NULL)
 225                 return tmpdir;
 226
 227         if(tmpdir == NULL)
 228                 tmpdir = try_dir(getenv("TMPDIR"));
 229         if(tmpdir == NULL)
 230                 tmpdir = try_dir(getenv("TMP"));
 231         if(tmpdir == NULL)
 232                 tmpdir = try_dir(getenv("TEMP"));
 233
 234 #ifdef P_tmpdir
 235         if(tmpdir == NULL)
 236                 tmpdir = try_dir(P_tmpdir);
 237 #endif
 238
 239         if(tmpdir == NULL)
 240                 tmpdir = try_dir("/var/tmp");
 241         if(tmpdir == NULL)
 242                 tmpdir = try_dir("/usr/tmp");
 243         if(tmpdir == NULL)
 244                 tmpdir = try_dir("/tmp");
 245
 246         if(tmpdir == NULL)
 247                 tmpdir = ".";
 248
 249         return tmpdir;
 250 }
 251
 252 /**
 253  * an own version of tmpnam, which: writes in a buffer, appends a user specified
 254  * suffix, emits no warnings during linking (like glibc/gnu ld do for tmpnam)...
 255  */
 256 static FILE *make_temp_file(char *buffer, size_t buflen,
 257                             const char *prefix, const char *suffix)
 258 {
 259         const char *tempdir = get_tempdir();
 260
 261         /* oh well... mkstemp doesn't accept a suffix after XXXXXX... */
 262         (void) suffix;
 263         suffix = "";
 264
 265         snprintf(buffer, buflen, "%s/%sXXXXXX%s", tempdir, prefix, suffix);
 266
 267         int fd = mkstemp(buffer);
 268         if(fd == -1) {
 269                 fprintf(stderr, "couldn't create temporary file: %s\n",
 270                         strerror(errno));
 271                 exit(1);
 272         }
 273         FILE *out = fdopen(fd, "w");
 274         if(out == NULL) {
 275                 fprintf(stderr, "couldn't create temporary file FILE*\n");
 276                 exit(1);
 277         }
 278
 279         return out;
 280 }
 281
 282 static void create_firm_prog(translation_unit_t *unit)
 283 {
 284         translation_unit_to_firm(unit);
 285
 286         //dump_globals_as_text(dump_verbosity_max, "-globals");
 287
 288         int n_irgs = get_irp_n_irgs();
 289         for(int i = 0; i < n_irgs; ++i) {
 290                 ir_graph *const irg = get_irp_irg(i);
 291                 dump(irg, "-start");
 292         }
 293
 294         lower_params_t params;
 295
 296         params.def_ptr_alignment    = 4;
 297         params.flags                = LF_COMPOUND_RETURN | LF_RETURN_HIDDEN;
 298         params.hidden_params        = ADD_HIDDEN_ALWAYS_IN_FRONT;
 299         params.find_pointer_type    = NULL;
 300         params.ret_compound_in_regs = NULL;
 301         lower_calls_with_compounds(&params);
 302
 303         lower_highlevel();
 304
 305         for(int i = 0; i < n_irgs; ++i) {
 306                 ir_graph *const irg = get_irp_irg(i);
 307                 dump(irg, "-lower");
 308         }
 309 }
 310
 311 static void optimize(void)
 312 {
 313         int         arr_len;
 314         ir_entity **keep_methods;
 315
 316         cgana(&arr_len, &keep_methods);
 317         gc_irgs(arr_len, keep_methods);
 318         free(keep_methods);
 319
 320         optimize_funccalls(0);
 321
 322         lwrdw_param_t lwrdw_param = {
 323                 1,
 324                 1,
 325                 mode_Ls, mode_Lu,
 326                 mode_Is, mode_Iu,
 327                 def_create_intrinsic_fkt,
 328                 NULL
 329         };
 330         if (be_params->arch_create_intrinsic_fkt) {
 331                 lwrdw_param.create_intrinsic = be_params->arch_create_intrinsic_fkt;
 332                 lwrdw_param.ctx              = be_params->create_intrinsic_ctx;
 333         }
 334
 335         for(int i = 0; i < get_irp_n_irgs(); ++i) {
 336                 ir_graph *irg = get_irp_irg(i);
 337
 338                 optimize_graph_df(irg);
 339                 dump(irg, "-01-localopt");
 340                 place_code(irg);
 341                 dump(irg, "-02-place");
 342                 optimize_cf(irg);
 343                 dump(irg, "-03-cf");
 344                 lower_dw_ops(&lwrdw_param);
 345                 dump(irg, "-04-dw");
 346                 optimize_graph_df(irg);
 347                 dump(irg, "-05-localopt");
 348                 optimize_cf(irg);
 349                 dump(irg, "-06-cf");
 350         }
 351 }
 352
 353 typedef enum compile_mode_t {
 354         Compile,
 355         CompileDump,
 356         CompileAssemble,
 357         CompileAssembleLink,
 358         LexTest,
 359         PrintAst,
 360         PrintFluffy
 361 } compile_mode_t;
 362
 363 static void usage(const char *argv0)
 364 {
 365         fprintf(stderr, "Usage %s input [-o output] [-c]\n", argv0);
 366 }
 367
 368 int main(int argc, char **argv)
 369 {
 370         initialize_firm();
 371
 372         init_symbol_table();
 373         init_tokens();
 374         init_types();
 375         init_typehash();
 376         init_lexer();
 377         init_ast();
 378         init_parser();
 379         init_ast2firm();
 380
 381         const char *input        = NULL;
 382         const char *outname      = NULL;
 383         const char *dumpfunction = NULL;
 384         compile_mode_t mode = CompileAssembleLink;
 385
 386         for(int i = 1; i < argc; ++i) {
 387                 const char *arg = argv[i];
 388                 if(strcmp(arg, "-o") == 0) {
 389                         ++i;
 390                         if(i >= argc) {
 391                                 usage(argv[0]);
 392                                 return 1;
 393                         }
 394                         outname = argv[i];
 395                 } else if(strcmp(arg, "-c") == 0) {
 396                         mode = CompileAssemble;
 397                 } else if(strcmp(arg, "-S") == 0) {
 398                         mode = Compile;
 399                 } else if(strcmp(arg, "--lextest") == 0) {
 400                         mode = LexTest;
 401                 } else if(strcmp(arg, "--print-ast") == 0) {
 402                         mode = PrintAst;
 403                 } else if(strcmp(arg, "--print-fluffy") == 0) {
 404                         mode = PrintFluffy;
 405                 } else if(strcmp(arg, "--dump") == 0) {
 406                         do_dump = true;
 407                 } else if(strcmp(arg, "--dump-function") == 0) {
 408                         ++i;
 409                         if(i >= argc) {
 410                                 usage(argv[0]);
 411                                 return 1;
 412                         }
 413                         dumpfunction = argv[i];
 414                         mode         = CompileDump;
 415                 } else if(strcmp(arg, "-v") == 0) {
 416                         verbose = 1;
 417                 } else if(arg[0] == '-' && arg[1] == 'f') {
 418                         const char *opt = &arg[2];
 419                         if(opt[0] == 0) {
 420                                 ++i;
 421                                 if(i >= argc) {
 422                                         usage(argv[0]);
 423                                         return 1;
 424                                 }
 425                                 opt = argv[i];
 426                                 if(opt[0] == '-') {
 427                                         usage(argv[0]);
 428                                         return 1;
 429                                 }
 430                         }
 431                         //firm_option(opt);
 432                 } else if(arg[0] == '-' && arg[1] == 'b') {
 433                         const char *opt = &arg[2];
 434                         if(opt[0] == 0) {
 435                                 ++i;
 436                                 if(i >= argc) {
 437                                         usage(argv[0]);
 438                                         return 1;
 439                                 }
 440                                 opt = argv[i];
 441                                 if(opt[0] == '-') {
 442                                         usage(argv[0]);
 443                                         return 1;
 444                                 }
 445                         }
 446                         //be_parse_arg(opt);
 447                 } else if(arg[0] == '-') {
 448                         if (arg[1] == '\0') {
 449                                 input = "-";
 450                         } else if (arg[1] == 'D' ||
 451                                         arg[1] == 'O' ||
 452                                         arg[1] == 'f' ||
 453                                         arg[1] == 'W' ||
 454                                         arg[1] == 'g' ||
 455                                         strncmp(arg + 1, "std=", 4) == 0) {
 456                                 fprintf(stderr, "Warning: Ignoring option '%s'\n", arg);
 457                         } else {
 458                                 usage(argv[0]);
 459                                 return 1;
 460                         }
 461                 } else {
 462                         if(input != NULL) {
 463                                 fprintf(stderr, "Error: multiple input files specified\n");
 464                                 usage(argv[0]);
 465                                 return 1;
 466                         } else {
 467                                 input = arg;
 468                         }
 469                 }
 470         }
 471
 472         FILE *out;
 473         char  outnamebuf[4096];
 474         if(outname == NULL) {
 475                 switch(mode) {
 476                 case PrintAst:
 477                 case PrintFluffy:
 478                 case LexTest:
 479                         break;
 480                 case Compile:
 481                         get_output_name(outnamebuf, sizeof(outnamebuf), input, ".s");
 482                         outname = outnamebuf;
 483                         break;
 484                 case CompileAssemble:
 485                         get_output_name(outnamebuf, sizeof(outnamebuf), input, ".o");
 486                         outname = outnamebuf;
 487                         break;
 488                 case CompileDump:
 489                         get_output_name(outnamebuf, sizeof(outnamebuf), dumpfunction,
 490                                         ".vcg");
 491                         outname = outnamebuf;
 492                         break;
 493                 case CompileAssembleLink:
 494                         outname = "a.out";
 495                         break;
 496                 }
 497                 assert(outname != NULL);
 498         }
 499
 500         if(strcmp(outname, "-") == 0) {
 501                 out = stdout;
 502         } else {
 503                 out = fopen(outname, "w");
 504                 if(out == NULL) {
 505                         fprintf(stderr, "Couldn't open '%s' for writing: %s\n", outname,
 506                                 strerror(errno));
 507                         return 1;
 508                 }
 509         }
 510
 511         FILE *in;
 512         if(input == NULL) {
 513                 fprintf(stderr, "%s: no input files\n", argv[0]);
 514                 return 1;
 515         } else if(strcmp(input, "-") == 0) {
 516                 in    = stdin;
 517                 input = "<stdin>";
 518         } else {
 519                 in = fopen(input, "r");
 520                 if(in == NULL) {
 521                         fprintf(stderr, "Couldn't open '%s': %s\n", input, strerror(errno));
 522                         return 1;
 523                 }
 524         }
 525
 526         if(mode == LexTest) {
 527                 lextest(in, input);
 528                 fclose(in);
 529                 return 0;
 530         }
 531
 532         FILE *preprocessed_in = preprocess(in, input);
 533         translation_unit_t *const unit = do_parsing(preprocessed_in, input);
 534         pclose(preprocessed_in);
 535         if(unit == NULL)
 536                 return 1;
 537
 538         if(mode == PrintAst) {
 539                 ast_set_output(out);
 540                 print_ast(unit);
 541                 return 0;
 542         }
 543         if(mode == PrintFluffy) {
 544                 write_fluffy_decls(out, unit);
 545         }
 546
 547         create_firm_prog(unit);
 548         optimize();
 549
 550         if(mode == CompileDump) {
 551                 /* find irg */
 552                 ident    *id     = new_id_from_str(dumpfunction);
 553                 ir_graph *irg    = NULL;
 554                 int       n_irgs = get_irp_n_irgs();
 555                 for(int i = 0; i < n_irgs; ++i) {
 556                         ir_graph *tirg   = get_irp_irg(i);
 557                         ident    *irg_id = get_entity_ident(get_irg_entity(tirg));
 558                         if(irg_id == id) {
 559                                 irg = tirg;
 560                                 break;
 561                         }
 562                 }
 563
 564                 if(irg == NULL) {
 565                         fprintf(stderr, "No graph for function '%s' found\n", dumpfunction);
 566                         return 1;
 567                 }
 568
 569                 dump_ir_block_graph_file(irg, out);
 570                 fclose(out);
 571                 return 0;
 572         }
 573
 574         /* generate code and emit assembler */
 575         FILE *asm_out;
 576         char  asm_tempfile[1024];
 577         if(mode == Compile) {
 578                 asm_out = out;
 579         } else {
 580                 asm_out
 581                         = make_temp_file(asm_tempfile, sizeof(asm_tempfile), "cc", ".s");
 582         }
 583         emit(asm_out, input);
 584         fclose(asm_out);
 585
 586         /* assemble assembler and create object file */
 587         char obj_tfile[1024];
 588         if(mode == CompileAssemble || mode == CompileAssembleLink) {
 589                 const char *obj_outfile;
 590                 if(mode == CompileAssemble) {
 591                         fclose(out);
 592                         obj_outfile = outname;
 593                 } else {
 594                         FILE *tempf
 595                                 = make_temp_file(obj_tfile, sizeof(obj_tfile), "cc", ".o");
 596                         fclose(tempf);
 597                         obj_outfile = obj_tfile;
 598                 }
 599
 600                 assemble(obj_outfile, asm_tempfile);
 601         }
 602
 603         /* link object file */
 604         if(mode == CompileAssembleLink) {
 605                 do_link(outname, obj_tfile);
 606         }
 607
 608         exit_ast2firm();
 609         exit_parser();
 610         exit_ast();
 611         exit_lexer();
 612         exit_typehash();
 613         exit_types();
 614         exit_tokens();
 615         exit_symbol_table();
 616         return 0;
 617 }