nsz Git - cparser/blob - main.c

   1 #include <config.h>
   2
   3 #include <stdio.h>
   4 #include <stdlib.h>
   5 #include <errno.h>
   6 #include <string.h>
   7 #include <assert.h>
   8
   9 #ifndef WITH_LIBCORE
  10 #define WITH_LIBCORE
  11 #endif
  12
  13 #include <libfirm/firm.h>
  14 #include <libfirm/be.h>
  15
  16 #include "lexer.h"
  17 #include "token_t.h"
  18 #include "type_hash.h"
  19 #include "parser.h"
  20 #include "ast2firm.h"
  21 #include "adt/error.h"
  22
  23 #define PREPROCESSOR "gcc -E"
  24 #define LINKER       "gcc"
  25
  26 static int verbose;
  27
  28 static const ir_settings_if_conv_t *if_conv_info = NULL;
  29
  30 static void initialize_firm(void)
  31 {
  32         be_opt_register();
  33         firm_init_options(NULL, 0, NULL);
  34
  35         const backend_params *be_params;
  36         firm_parameter_t params;
  37         memset(&params, 0, sizeof(params));
  38
  39         params.size = sizeof(params);
  40         params.enable_statistics = 0;
  41         params.initialize_local_func = uninitialized_local_var;
  42         params.cc_mask = 0;
  43         params.builtin_dbg = NULL;
  44
  45         /* initialize backend */
  46         be_params = be_init();
  47         be_set_debug_retrieve(retrieve_dbg);
  48         params.arch_op_settings = be_params->arch_op_settings;
  49         if_conv_info            = be_params->if_conv_info;
  50
  51         /* intialize firm itself */
  52         init_firm(&params);
  53         dbg_init(NULL, NULL, dbg_snprint);
  54
  55         set_opt_constant_folding(1);
  56         set_opt_unreachable_code(1);
  57         set_opt_control_flow_straightening(1);
  58         set_opt_control_flow_weak_simplification(1);
  59         set_opt_control_flow_strong_simplification(1);
  60         set_opt_dead_node_elimination(1);
  61         set_opt_reassociation(1);
  62         set_opt_inline(1);
  63         set_opt_dyn_meth_dispatch(1);
  64         set_opt_normalize(1);
  65         set_opt_tail_recursion(1);
  66         set_opt_dead_method_elimination(1);
  67         set_opt_precise_exc_context(0);
  68         set_opt_loop_unrolling(0);
  69         set_opt_strength_red(0);
  70         set_opt_redundant_loadstore(1);
  71         set_opt_fragile_ops(0);
  72         set_opt_function_call(1);
  73         set_opt_optimize_class_casts(0);
  74         set_opt_suppress_downcast_optimization(0);
  75         set_opt_remove_confirm(1);
  76         set_opt_scalar_replacement(1);
  77         set_opt_ldst_only_null_ptr_exceptions(1);
  78         set_opt_alias_analysis(1);
  79
  80         dump_consts_local(1);
  81         dump_keepalive_edges(1);
  82 }
  83
  84 static void dump(ir_graph *irg, const char *suffix)
  85 {
  86         dump_ir_block_graph(irg, suffix);
  87 }
  88
  89 static void get_output_name(char *buf, size_t buflen, const char *inputname,
  90                             const char *newext)
  91 {
  92         size_t last_dot = 0xffffffff;
  93         size_t i = 0;
  94         for(const char *c = inputname; *c != 0; ++c) {
  95                 if(*c == '.')
  96                         last_dot = i;
  97                 ++i;
  98         }
  99         if(last_dot == 0xffffffff)
 100                 last_dot = i;
 101
 102         if(last_dot >= buflen)
 103                 panic("filename too long");
 104         memcpy(buf, inputname, last_dot);
 105
 106         size_t extlen = strlen(newext) + 1;
 107         if(extlen + last_dot >= buflen)
 108                 panic("filename too long");
 109         memcpy(buf+last_dot, newext, extlen);
 110 }
 111
 112 static translation_unit_t *do_parsing(const char *fname, const char *input)
 113 {
 114         FILE *in = fopen(fname, "r");
 115         if(in == NULL) {
 116                 fprintf(stderr, "Couldn't open '%s': %s\n", fname, strerror(errno));
 117                 exit(1);
 118         }
 119
 120         lexer_open_stream(in, input);
 121
 122         translation_unit_t *unit = parse();
 123
 124         fclose(in);
 125
 126         return unit;
 127 }
 128
 129 static void lextest(const char *fname)
 130 {
 131         FILE *in = fopen(fname, "r");
 132         if(in == NULL) {
 133                 fprintf(stderr, "Couldn't open '%s': %s\n", fname, strerror(errno));
 134                 exit(1);
 135         }
 136
 137         lexer_open_stream(in, fname);
 138
 139         do {
 140                 lexer_next_preprocessing_token();
 141                 print_token(stdout, &lexer_token);
 142                 puts("");
 143         } while(lexer_token.type != T_EOF);
 144
 145         fclose(in);
 146 }
 147
 148 static void backend(const char *inputname, const char *outname)
 149 {
 150         FILE *out = fopen(outname, "w");
 151         if(out == NULL) {
 152                 fprintf(stderr, "couldn't open '%s' for writing: %s\n", outname,
 153                                 strerror(errno));
 154                 exit(1);
 155         }
 156
 157         be_main(out, inputname);
 158
 159         fclose(out);
 160 }
 161
 162 static void emit(const char *input_name, const char *out_name)
 163 {
 164         backend(input_name, out_name);
 165 }
 166
 167 static void preprocess(const char *in, const char *out)
 168 {
 169         char buf[4096];
 170
 171         snprintf(buf, sizeof(buf), "%s %s -o %s", PREPROCESSOR, in, out);
 172         if(verbose) {
 173                 puts(buf);
 174         }
 175         int err = system(buf);
 176         if(err != 0) {
 177                 fprintf(stderr, "preprocessor reported an error\n");
 178                 exit(1);
 179         }
 180 }
 181
 182 static void link(const char *in, const char *out)
 183 {
 184         char buf[4096];
 185
 186         snprintf(buf, sizeof(buf), "%s %s -o %s", LINKER, in, out);
 187         if(verbose) {
 188                 puts(buf);
 189         }
 190         int err = system(buf);
 191         if(err != 0) {
 192                 fprintf(stderr, "linker reported an error\n");
 193                 exit(1);
 194         }
 195 }
 196
 197 static void assemble(const char *in, const char *out)
 198 {
 199         char buf[4096];
 200
 201         snprintf(buf, sizeof(buf), "%s %s -c -o %s", LINKER, in, out);
 202         if(verbose) {
 203                 puts(buf);
 204         }
 205         int err = system(buf);
 206         if(err != 0) {
 207                 fprintf(stderr, "assembler reported an error\n");
 208                 exit(1);
 209         }
 210 }
 211
 212 static void create_firm_prog(translation_unit_t *unit)
 213 {
 214         translation_unit_to_firm(unit);
 215
 216         int n_irgs = get_irp_n_irgs();
 217         for(int i = 0; i < n_irgs; ++i) {
 218                 ir_graph *const irg = get_irp_irg(i);
 219                 dump(irg, "-start");
 220         }
 221 }
 222
 223 static void optimize(void)
 224 {
 225         int         arr_len;
 226         ir_entity **keep_methods;
 227
 228         cgana(&arr_len, &keep_methods);
 229         gc_irgs(arr_len, keep_methods);
 230         free(keep_methods);
 231
 232         optimize_funccalls(0);
 233
 234         for(int i = 0; i < get_irp_n_irgs(); ++i) {
 235                 ir_graph *irg = get_irp_irg(i);
 236                 place_code(irg);
 237                 dump(irg, "-place");
 238                 optimize_graph_df(irg);
 239                 dump(irg, "-localopt");
 240                 optimize_cf(irg);
 241                 dump(irg, "-cf");
 242         }
 243 }
 244
 245 void write_fluffy_decls(translation_unit_t *unit);
 246
 247 typedef enum compile_mode_t {
 248         Compile,
 249         CompileAssemble,
 250         CompileAssembleLink,
 251         LexTest,
 252         PrintAst,
 253         PrintFluffy
 254 } compile_mode_t;
 255
 256 static void usage(const char *argv0)
 257 {
 258         fprintf(stderr, "Usage %s input [-o output] [-c]\n", argv0);
 259 }
 260
 261 int main(int argc, char **argv)
 262 {
 263         initialize_firm();
 264
 265         init_symbol_table();
 266         init_tokens();
 267         init_lexer();
 268         init_types();
 269         init_typehash();
 270         init_ast();
 271         init_parser();
 272         init_ast2firm();
 273
 274         const char *input   = NULL;
 275         const char *outname = NULL;
 276         compile_mode_t mode = CompileAssembleLink;
 277
 278         for(int i = 1; i < argc; ++i) {
 279                 const char *arg = argv[i];
 280                 if(strcmp(arg, "-o") == 0) {
 281                         ++i;
 282                         if(i >= argc) {
 283                                 usage(argv[0]);
 284                                 return 1;
 285                         }
 286                         outname = argv[i];
 287                 } else if(strcmp(arg, "-c") == 0) {
 288                         mode = CompileAssemble;
 289                 } else if(strcmp(arg, "-S") == 0) {
 290                         mode = Compile;
 291                 } else if(strcmp(arg, "--lextest") == 0) {
 292                         mode = LexTest;
 293                 } else if(strcmp(arg, "--print-ast") == 0) {
 294                         mode = PrintAst;
 295                 } else if(strcmp(arg, "--print-fluffy") == 0) {
 296                         mode = PrintFluffy;
 297                 } else if(strcmp(arg, "-v") == 0) {
 298                         verbose = 1;
 299                 } else if(arg[0] == '-') {
 300                         usage(argv[0]);
 301                         return 1;
 302                 } else {
 303                         if(input != NULL) {
 304                                 fprintf(stderr, "Error: multiple input files specified\n");
 305                                 usage(argv[0]);
 306                                 return 1;
 307                         } else {
 308                                 input = arg;
 309                         }
 310                 }
 311         }
 312
 313         if(input == NULL) {
 314                 fprintf(stderr, "%s: no input files\n", argv[0]);
 315                 return 1;
 316         }
 317
 318         if(mode == LexTest) {
 319                 lextest(input);
 320                 return 0;
 321         }
 322
 323         const char *tmpfile = tmpnam(NULL);
 324         preprocess(input, tmpfile);
 325
 326         translation_unit_t *unit = do_parsing(tmpfile, input);
 327         if(unit == NULL)
 328                 return 1;
 329
 330         if(mode == PrintAst) {
 331                 print_ast(unit);
 332                 return 0;
 333         }
 334         if(mode == PrintFluffy) {
 335                 ast_set_output(stdout);
 336                 write_fluffy_decls(unit);
 337         }
 338
 339         char outsname[4096];
 340         const char *sname = NULL;
 341         if(mode == Compile) {
 342                 sname = outname;
 343         }
 344         if(sname == NULL) {
 345                 get_output_name(outsname, sizeof(outsname), input, ".s");
 346                 sname = outsname;
 347         }
 348
 349         create_firm_prog(unit);
 350         optimize();
 351         emit(input, sname);
 352
 353         if(mode == CompileAssemble) {
 354                 char outoname[4096];
 355                 const char *oname = outname;
 356                 if(oname == NULL) {
 357                         get_output_name(outoname, sizeof(outoname), input, ".o");
 358                         oname = outoname;
 359                 }
 360                 assemble(sname, oname);
 361         } else {
 362                 assert(mode == CompileAssembleLink);
 363
 364                 if(outname == NULL)
 365                         outname = "a.out";
 366
 367                 link(sname, outname);
 368         }
 369
 370         exit_ast2firm();
 371         exit_parser();
 372         exit_ast();
 373         exit_typehash();
 374         exit_types();
 375         exit_lexer();
 376         exit_tokens();
 377         exit_symbol_table();
 378         return 0;
 379 }