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 <errno.h>
   8 #include <string.h>
   9 #include <assert.h>
  10
  11 #ifndef WITH_LIBCORE
  12 #define WITH_LIBCORE
  13 #endif
  14
  15 #include <libfirm/firm.h>
  16 #include <libfirm/be.h>
  17
  18 #include "lexer.h"
  19 #include "token_t.h"
  20 #include "type_hash.h"
  21 #include "parser.h"
  22 #include "ast2firm.h"
  23 #include "adt/error.h"
  24
  25 #define PREPROCESSOR "cpp"
  26 #define LINKER       "gcc"
  27
  28 #ifdef _WIN32
  29 /* remap some names */
  30 #define popen(cmd, mode)  _popen(cmd, mode)
  31 #define pclose(file)      _pclose(file)
  32 #endif /* _WIN32 */
  33
  34 static int verbose;
  35
  36 static const ir_settings_if_conv_t *if_conv_info = NULL;
  37
  38 static void initialize_firm(void)
  39 {
  40         be_opt_register();
  41         firm_init_options(NULL, 0, NULL);
  42
  43         const backend_params *be_params;
  44         firm_parameter_t params;
  45         memset(&params, 0, sizeof(params));
  46
  47         params.size = sizeof(params);
  48         params.enable_statistics = 0;
  49         params.initialize_local_func = uninitialized_local_var;
  50         params.cc_mask = 0;
  51         params.builtin_dbg = NULL;
  52
  53         /* initialize backend */
  54         be_params = be_init();
  55         be_set_debug_retrieve(retrieve_dbg);
  56         params.arch_op_settings = be_params->arch_op_settings;
  57         if_conv_info            = be_params->if_conv_info;
  58
  59         /* intialize firm itself */
  60         init_firm(&params);
  61         dbg_init(NULL, NULL, dbg_snprint);
  62
  63         set_opt_constant_folding(1);
  64         set_opt_unreachable_code(1);
  65         set_opt_control_flow_straightening(1);
  66         set_opt_control_flow_weak_simplification(1);
  67         set_opt_control_flow_strong_simplification(1);
  68         set_opt_dyn_meth_dispatch(1);
  69         set_opt_normalize(1);
  70         set_opt_precise_exc_context(0);
  71         set_opt_strength_red(0);
  72         set_opt_fragile_ops(0);
  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(FILE *const in, const char *const input)
 113 {
 114         lexer_open_stream(in, input);
 115         translation_unit_t *unit = parse();
 116         return unit;
 117 }
 118
 119 static void lextest(const char *fname)
 120 {
 121         FILE *in = fopen(fname, "r");
 122         if(in == NULL) {
 123                 fprintf(stderr, "Couldn't open '%s': %s\n", fname, strerror(errno));
 124                 exit(1);
 125         }
 126
 127         lexer_open_stream(in, fname);
 128
 129         do {
 130                 lexer_next_preprocessing_token();
 131                 print_token(stdout, &lexer_token);
 132                 puts("");
 133         } while(lexer_token.type != T_EOF);
 134
 135         fclose(in);
 136 }
 137
 138 static void backend(const char *inputname, const char *outname)
 139 {
 140         FILE *out = fopen(outname, "w");
 141         if(out == NULL) {
 142                 fprintf(stderr, "couldn't open '%s' for writing: %s\n", outname,
 143                                 strerror(errno));
 144                 exit(1);
 145         }
 146
 147         be_main(out, inputname);
 148
 149         fclose(out);
 150 }
 151
 152 static void emit(const char *input_name, const char *out_name)
 153 {
 154         backend(input_name, out_name);
 155 }
 156
 157 static FILE* preprocess(const char *in)
 158 {
 159         char buf[4096];
 160
 161         snprintf(buf, sizeof(buf), PREPROCESSOR " %s -o -",in);
 162         if(verbose) {
 163                 puts(buf);
 164         }
 165         FILE* f = popen(buf, "r");
 166         if (f == NULL) {
 167                 fprintf(stderr, "invoking preprocessor failed\n");
 168                 exit(1);
 169         }
 170         return f;
 171 }
 172
 173 static void link(const char *in, const char *out)
 174 {
 175         char buf[4096];
 176
 177         snprintf(buf, sizeof(buf), "%s %s -o %s", LINKER, in, out);
 178         if(verbose) {
 179                 puts(buf);
 180         }
 181         int err = system(buf);
 182         if(err != 0) {
 183                 fprintf(stderr, "linker reported an error\n");
 184                 exit(1);
 185         }
 186 }
 187
 188 static void assemble(const char *in, const char *out)
 189 {
 190         char buf[4096];
 191
 192         snprintf(buf, sizeof(buf), "%s %s -c -o %s", LINKER, in, out);
 193         if(verbose) {
 194                 puts(buf);
 195         }
 196         int err = system(buf);
 197         if(err != 0) {
 198                 fprintf(stderr, "assembler reported an error\n");
 199                 exit(1);
 200         }
 201 }
 202
 203 static void create_firm_prog(translation_unit_t *unit)
 204 {
 205         translation_unit_to_firm(unit);
 206
 207         //dump_globals_as_text(dump_verbosity_max, "-globals");
 208
 209         int n_irgs = get_irp_n_irgs();
 210         for(int i = 0; i < n_irgs; ++i) {
 211                 ir_graph *const irg = get_irp_irg(i);
 212                 dump(irg, "-start");
 213         }
 214
 215         lower_highlevel();
 216         for(int i = 0; i < n_irgs; ++i) {
 217                 ir_graph *const irg = get_irp_irg(i);
 218                 dump(irg, "-lower");
 219         }
 220 }
 221
 222 static void optimize(void)
 223 {
 224         int         arr_len;
 225         ir_entity **keep_methods;
 226
 227         cgana(&arr_len, &keep_methods);
 228         gc_irgs(arr_len, keep_methods);
 229         free(keep_methods);
 230
 231         optimize_funccalls(0);
 232
 233         for(int i = 0; i < get_irp_n_irgs(); ++i) {
 234                 ir_graph *irg = get_irp_irg(i);
 235
 236                 optimize_graph_df(irg);
 237                 dump(irg, "-localopt");
 238                 place_code(irg);
 239                 dump(irg, "-place");
 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         FILE *const in = preprocess(input);
 324         translation_unit_t *const unit = do_parsing(in, input);
 325         pclose(in);
 326         if(unit == NULL)
 327                 return 1;
 328
 329         if(mode == PrintAst) {
 330                 print_ast(unit);
 331                 return 0;
 332         }
 333         if(mode == PrintFluffy) {
 334                 ast_set_output(stdout);
 335                 write_fluffy_decls(unit);
 336         }
 337
 338         char outsname[4096];
 339         const char *sname = NULL;
 340         if(mode == Compile) {
 341                 sname = outname;
 342         }
 343         if(sname == NULL) {
 344                 get_output_name(outsname, sizeof(outsname), input, ".s");
 345                 sname = outsname;
 346         }
 347
 348         create_firm_prog(unit);
 349         optimize();
 350         emit(input, sname);
 351
 352         if(mode == CompileAssemble) {
 353                 char outoname[4096];
 354                 const char *oname = outname;
 355                 if(oname == NULL) {
 356                         get_output_name(outoname, sizeof(outoname), input, ".o");
 357                         oname = outoname;
 358                 }
 359                 assemble(sname, oname);
 360         } else {
 361                 assert(mode == CompileAssembleLink);
 362
 363                 if(outname == NULL)
 364                         outname = "a.out";
 365
 366                 link(sname, outname);
 367         }
 368
 369         exit_ast2firm();
 370         exit_parser();
 371         exit_ast();
 372         exit_typehash();
 373         exit_types();
 374         exit_lexer();
 375         exit_tokens();
 376         exit_symbol_table();
 377         return 0;
 378 }