generator.c

   1 #include <stdio.h>
   2 #include <stdlib.h>
   3 #include <stdarg.h>
   4 #include <ctype.h>
   5 #include <string.h>
   6 #include <assert.h>
   7
   8 #include "oberon.h"
   9 #include "generator.h"
  10
  11 // =======================================================================
  12 //   ALLOC
  13 // =======================================================================
  14
  15 static void
  16 oberon_generator_open_block(gen_context_t * gen_context, gcc_jit_block * gcc_block)
  17 {
  18         gen_block_t * block = malloc(sizeof *block);
  19         memset(block, 0, sizeof *block);
  20
  21         block -> gcc_block = gcc_block;
  22         block -> up = gen_context -> block;
  23
  24         gen_context -> block = block;
  25 }
  26
  27 static void
  28 oberon_generator_close_block(gen_context_t * gen_context)
  29 {
  30         gen_context -> block = gen_context -> block -> up;
  31 }
  32
  33 void
  34 oberon_generator_init_context(oberon_context_t * ctx)
  35 {
  36         gen_context_t * gen_context = malloc(sizeof *gen_context);
  37         memset(gen_context, 0, sizeof *gen_context);
  38
  39         gcc_jit_context * gcc_context;
  40         gcc_context = gcc_jit_context_acquire();
  41
  42         ctx -> gen_context = gen_context;
  43         gen_context -> gcc_context = gcc_context;
  44 }
  45
  46 void
  47 oberon_generator_destroy_context(oberon_context_t * ctx)
  48 {
  49         gen_context_t * gen_context = ctx -> gen_context;
  50         gcc_jit_context * gcc_context = gen_context -> gcc_context;
  51
  52         gcc_jit_context_release(gcc_context);
  53 }
  54
  55 void
  56 oberon_generator_init_type(oberon_context_t * ctx, oberon_type_t * type)
  57 {
  58         gen_type_t * gen_type = malloc(sizeof *gen_type);
  59         memset(gen_type, 0, sizeof *gen_type);
  60         type -> gen_type = gen_type;
  61
  62         gen_context_t * gen_context = ctx -> gen_context;
  63         gcc_jit_context * gcc_context = gen_context -> gcc_context;
  64
  65         gcc_jit_type * gcc_type = NULL;
  66         gcc_jit_struct * gcc_struct = NULL;
  67         if(type -> class == OBERON_TYPE_VOID)
  68         {
  69                 gcc_type = gcc_jit_context_get_type(gcc_context, GCC_JIT_TYPE_VOID);
  70         }
  71         else if(type -> class == OBERON_TYPE_INTEGER)
  72         {
  73                 gcc_type = gcc_jit_context_get_int_type(gcc_context, type -> size, 1);
  74         }
  75         else if(type -> class == OBERON_TYPE_BOOLEAN)
  76         {
  77                 gcc_type = gcc_jit_context_get_type(gcc_context, GCC_JIT_TYPE_BOOL);
  78         }
  79         else if(type -> class == OBERON_TYPE_ARRAY)
  80         {
  81                 gen_type_t * gen_base = type -> base -> gen_type;
  82                 gcc_jit_type * gcc_base = gen_base -> gcc_type;
  83                 gcc_type = gcc_jit_context_new_array_type(gcc_context, NULL, gcc_base, type -> size);
  84         }
  85         else if(type -> class == OBERON_TYPE_RECORD)
  86         {
  87                 char name[32];
  88                 snprintf(name, 32, "RECORD%u", gen_context -> record_count);
  89                 gen_context -> record_count += 1;
  90
  91                 gcc_struct = gcc_jit_context_new_opaque_struct(gcc_context, NULL, name);
  92                 gcc_type = gcc_jit_struct_as_type(gcc_struct);
  93         }
  94         else if(type -> class == OBERON_TYPE_POINTER)
  95         {
  96                 gen_type_t * gen_base = type -> base -> gen_type;
  97                 gcc_jit_type * gcc_base = gen_base -> gcc_type;
  98                 gcc_type = gcc_jit_type_get_pointer(gcc_base);
  99         }
 100         else if(type -> class == OBERON_TYPE_PROCEDURE)
 101         {
 102                 int num_params = type -> num_decl;
 103                 gcc_jit_type * params[num_params];
 104                 oberon_object_t * o = type -> decl;
 105                 for(int i = 0; i < num_params; i++)
 106                 {
 107                         gen_type_t * gen_type = o -> type -> gen_type;
 108                         params[i] = gen_type -> gcc_type;
 109                         o = o -> next;
 110                 }
 111
 112                 gen_type_t * base = type -> base -> gen_type;
 113                 gcc_jit_type * result_type = base -> gcc_type;
 114
 115                 gcc_type = gcc_jit_context_new_function_ptr_type(
 116                         gcc_context, NULL, result_type, num_params, params, 0
 117                 );
 118         }
 119         else
 120         {
 121                 oberon_error(ctx, "oberon_generator_init_type: invalid type class %i", type -> class);
 122         }
 123
 124         assert(gcc_type);
 125         gen_type -> gcc_type = gcc_type;
 126         gen_type -> gcc_struct = gcc_struct;
 127 }
 128
 129 void
 130 oberon_generator_init_record(oberon_context_t * ctx, oberon_type_t * type)
 131 {
 132         assert(type -> class == OBERON_TYPE_RECORD);
 133
 134         gen_type_t * gen_type = type -> gen_type;
 135         gcc_jit_struct * gcc_struct = gen_type -> gcc_struct;
 136
 137         // TODO type exstension
 138
 139         int num_fields = type -> num_decl;
 140         gcc_jit_field * fields[num_fields];
 141         oberon_object_t * o = type -> decl;
 142         for(int i = 0; i < num_fields; i++)
 143         {
 144                 assert(o -> class == OBERON_CLASS_FIELD);
 145                 gen_var_t * var = o -> gen_var;
 146                 fields[i] = var -> gcc_field;
 147                 o = o -> next;
 148         }
 149
 150         gcc_jit_struct_set_fields (gcc_struct, NULL, num_fields, fields);
 151
 152         //gcc_struct = gcc_jit_context_new_struct_type(gcc_context, NULL, "", num_fields, fields);
 153 }
 154
 155 static void
 156 oberon_generator_get_full_name(char * name, int max_len, oberon_object_t * o)
 157 {
 158         if(!o)
 159         {
 160                 name[0] = 0;
 161                 return;
 162         }
 163
 164         char parent[256];
 165         oberon_generator_get_full_name(parent, 256, o -> parent);
 166
 167         char * xname;
 168 //      if(o -> class == OBERON_CLASS_MODULE)
 169 //      {
 170 //              xname = o -> module -> name;
 171 //      }
 172 //      else
 173 //      {
 174                 xname = o -> name;
 175 //      }
 176
 177         if(strlen(parent) > 0)
 178         {
 179                 snprintf(name, max_len, "%s_%s", parent, xname);
 180         }
 181         else
 182         {
 183                 snprintf(name, max_len, "%s", xname);
 184         }
 185 }
 186
 187 void
 188 oberon_generator_init_var(oberon_context_t * ctx, oberon_object_t * var)
 189 {
 190         gen_context_t * gen_context = ctx -> gen_context;
 191         gen_type_t * gen_type = var -> type -> gen_type;
 192
 193         gen_var_t * gen_var = malloc(sizeof *gen_var);
 194         memset(gen_var, 0, sizeof *gen_var);
 195         var -> gen_var = gen_var;
 196
 197         gcc_jit_context * gcc_context = gen_context -> gcc_context;
 198         gcc_jit_type * gcc_type = gen_type -> gcc_type;
 199
 200         char name[256];
 201         oberon_generator_get_full_name(name, 256, var);
 202
 203         gcc_jit_lvalue * gcc_lvalue = NULL;
 204         gcc_jit_param * gcc_param = NULL;
 205         gcc_jit_field * gcc_field = NULL;
 206         if(var -> class == OBERON_CLASS_VAR)
 207         {
 208                 if(var -> local)
 209                 {
 210                         gen_proc_t * gen_func = var -> parent -> gen_proc;
 211                         gcc_jit_function * func = gen_func -> gcc_func;
 212
 213                         gcc_lvalue = gcc_jit_function_new_local(func, NULL, gcc_type, name);
 214                 }
 215                 else
 216                 {
 217                         gcc_lvalue = gcc_jit_context_new_global(
 218                                 gcc_context, NULL, GCC_JIT_GLOBAL_INTERNAL, gcc_type, name
 219                         );
 220                 }
 221         }
 222         else if(var -> class == OBERON_CLASS_PARAM)
 223         {
 224                 gcc_param = gcc_jit_context_new_param(gcc_context, NULL, gcc_type, name);
 225                 gcc_lvalue = gcc_jit_param_as_lvalue(gcc_param);
 226         }
 227         else if(var -> class == OBERON_CLASS_VAR_PARAM)
 228         {
 229                 gcc_type = gcc_jit_type_get_pointer(gcc_type);
 230                 gcc_param = gcc_jit_context_new_param(gcc_context, NULL, gcc_type, name);
 231                 gcc_lvalue = gcc_jit_param_as_lvalue(gcc_param);
 232         }
 233         else if(var -> class == OBERON_CLASS_FIELD)
 234         {
 235                 gcc_field = gcc_jit_context_new_field(gcc_context, NULL, gcc_type, name);
 236         }
 237         else
 238         {
 239                 oberon_error(ctx, "oberon_generator_init_var: invalid class %i", var -> class);
 240         }
 241
 242         gen_var -> gcc_lvalue = gcc_lvalue;
 243         gen_var -> gcc_param = gcc_param;
 244         gen_var -> gcc_field = gcc_field;
 245 }
 246
 247 void
 248 oberon_generator_init_proc(oberon_context_t * ctx, oberon_object_t * proc)
 249 {
 250         if(proc -> local)
 251         {
 252                 oberon_error(ctx, "generator: local procedures not supported");
 253         }
 254
 255         gen_context_t * gen_context = ctx -> gen_context;
 256         gcc_jit_context * gcc_context = gen_context -> gcc_context;
 257
 258         gen_proc_t * gen_proc = malloc(sizeof *gen_proc);
 259         memset(gen_proc, 0, sizeof *gen_proc);
 260         proc -> gen_proc = gen_proc;
 261
 262         char name[256];
 263         oberon_generator_get_full_name(name, 256, proc);
 264
 265         gen_type_t * gen_result_type = proc -> type -> base -> gen_type;
 266         gcc_jit_type * result_type = gen_result_type -> gcc_type;
 267
 268         /* Строим список параметров */
 269         int num_param = proc -> type -> num_decl;
 270         oberon_object_t * o = proc -> type -> decl;
 271         gcc_jit_param * params[num_param];
 272         for(int i = 0; i < num_param; i++)
 273         {
 274                 gen_var_t * param_var = o -> gen_var;
 275                 params[i] = param_var -> gcc_param;
 276                 o = o -> next;
 277         }
 278
 279         gcc_jit_function * gcc_func;
 280         gcc_func = gcc_jit_context_new_function(
 281                 gcc_context, NULL, GCC_JIT_FUNCTION_EXPORTED, result_type, name, num_param, params, 0
 282         );
 283
 284         gen_proc -> gcc_func = gcc_func;
 285 }
 286
 287 // =======================================================================
 288 //   GENERATOR
 289 // =======================================================================
 290
 291 static gcc_jit_rvalue * rvalue_from_item(oberon_context_t * ctx, oberon_item_t * item);
 292 static gcc_jit_rvalue * rvalue_from_expr(oberon_context_t * ctx, oberon_expr_t * expr);
 293
 294 void
 295 oberon_generate_begin_module(oberon_context_t * ctx)
 296 {
 297         gen_context_t * gen_context = ctx -> gen_context;
 298         gcc_jit_context * gcc_context = gen_context -> gcc_context;
 299
 300         char name[256];
 301         snprintf(name, 256, "%s_BEGIN", ctx -> mod -> name);
 302
 303         gcc_jit_type * void_type = gcc_jit_context_get_type(gcc_context, GCC_JIT_TYPE_VOID);
 304         gcc_jit_function * func = gcc_jit_context_new_function(
 305                 gcc_context, NULL, GCC_JIT_FUNCTION_EXPORTED, void_type, name, 0, NULL, 0
 306         );
 307         gcc_jit_block * gcc_block = gcc_jit_function_new_block(func, NULL);
 308
 309         oberon_generator_open_block(gen_context, gcc_block);
 310 }
 311
 312 void
 313 oberon_generate_end_module(oberon_context_t * ctx)
 314 {
 315         gen_context_t * gen_context = ctx -> gen_context;
 316         gcc_jit_block * gcc_block = gen_context -> block -> gcc_block;
 317
 318         gcc_jit_block_end_with_void_return(gcc_block, NULL);
 319
 320         oberon_generator_close_block(gen_context);
 321 }
 322
 323 void
 324 oberon_generate_begin_proc(oberon_context_t * ctx, oberon_object_t * proc)
 325 {
 326         gen_context_t * gen_context = ctx -> gen_context;
 327         gen_proc_t * gen_proc = proc -> gen_proc;
 328
 329         gcc_jit_function * func = gen_proc -> gcc_func;
 330         gcc_jit_block * gcc_block = gcc_jit_function_new_block(func, NULL);
 331
 332         oberon_generator_open_block(gen_context, gcc_block);
 333 }
 334
 335 void
 336 oberon_generate_call_proc(oberon_context_t * ctx, oberon_expr_t * desig)
 337 {
 338         gen_context_t * gen_context = ctx -> gen_context;
 339         gen_block_t * gen_block = gen_context -> block;
 340         gcc_jit_block * block = gen_block -> gcc_block;
 341
 342         gcc_jit_rvalue * return_value;
 343         return_value = rvalue_from_expr(ctx, desig);
 344         gcc_jit_block_add_eval(block, NULL, return_value);
 345 }
 346
 347 void
 348 oberon_generate_end_proc(oberon_context_t * ctx)
 349 {
 350         gen_context_t * gen_context = ctx -> gen_context;
 351         oberon_generator_close_block(gen_context);
 352 }
 353
 354 void
 355 oberon_generate_return(oberon_context_t * ctx, oberon_expr_t * expr)
 356 {
 357         gen_context_t * gen_context = ctx -> gen_context;
 358         gen_block_t * gen_block = gen_context -> block;
 359         gcc_jit_block * gcc_block = gen_block -> gcc_block;
 360
 361         if(expr == NULL)
 362         {
 363                 gcc_jit_block_end_with_void_return(gcc_block, NULL);
 364         }
 365         else
 366         {
 367                 gcc_jit_rvalue * r = rvalue_from_expr(ctx, expr);
 368                 gcc_jit_block_end_with_return(gcc_block, NULL, r);
 369         }
 370 }
 371
 372 static gcc_jit_lvalue *
 373 lvalue_from_item(oberon_context_t * ctx, oberon_item_t * item)
 374 {
 375         gen_context_t * gen_context = ctx -> gen_context;
 376         gcc_jit_context * gcc_context = gen_context -> gcc_context;
 377
 378         gcc_jit_lvalue * left;
 379
 380         if(item -> mode == MODE_VAR)
 381         {
 382                 if(item -> var -> class == OBERON_CLASS_PROC)
 383                 {
 384                         oberon_error(ctx, "casting static procedure to pointer not supported by generator");
 385                 }
 386
 387                 gen_var_t * gen_var = item -> var -> gen_var;
 388                 left = gen_var -> gcc_lvalue;
 389                 if(item -> var -> class == OBERON_CLASS_VAR_PARAM)
 390                 {
 391                         gcc_jit_rvalue * r = gcc_jit_lvalue_as_rvalue(left);
 392                         left = gcc_jit_rvalue_dereference(r, NULL);
 393                 }
 394         }
 395         else if(item -> mode == MODE_INDEX)
 396         {
 397                 assert(item -> num_args == 1);
 398                 gcc_jit_rvalue * parent = rvalue_from_item(ctx, item -> parent);
 399                 gcc_jit_rvalue * index = rvalue_from_expr(ctx, item -> args);
 400                 left = gcc_jit_context_new_array_access(gcc_context, NULL, parent, index);
 401         }
 402         else if(item -> mode == MODE_FIELD)
 403         {
 404                 printf("lvalue_from_item: %s\n", item -> var -> name);
 405                 gen_var_t * gen_var = item -> var -> gen_var;
 406                 gcc_jit_field * gcc_field = gen_var -> gcc_field;
 407
 408                 gcc_jit_lvalue * parent = lvalue_from_item(ctx, item -> parent);
 409                 left = gcc_jit_lvalue_access_field(parent, NULL, gcc_field);
 410         }
 411         else if(item -> mode == MODE_DEREF)
 412         {
 413                 gcc_jit_rvalue * parent = rvalue_from_item(ctx, item -> parent);
 414                 left = gcc_jit_rvalue_dereference(parent, NULL);
 415         }
 416         else
 417         {
 418                 oberon_error(ctx, "invalid lvalue expression");
 419         }
 420
 421         return left;
 422 }
 423
 424 static gcc_jit_lvalue *
 425 lvalue_from_expr(oberon_context_t *ctx, oberon_expr_t * expr)
 426 {
 427         gcc_jit_lvalue * left;
 428         oberon_item_t * item;
 429
 430         if(expr -> is_item)
 431         {
 432                 item = (oberon_item_t *) expr;
 433                 left = lvalue_from_item(ctx, item);
 434         }
 435         else
 436         {
 437                 oberon_error(ctx, "invalid lvalue expression");
 438         }
 439
 440         return left;
 441 }
 442
 443 static gcc_jit_rvalue *
 444 rvalue_from_item(oberon_context_t * ctx, oberon_item_t * item)
 445 {
 446         gen_context_t * gen_context = ctx -> gen_context;
 447         gcc_jit_context * gcc_context = gen_context -> gcc_context;
 448
 449         gcc_jit_rvalue * right;
 450         if(item -> mode == MODE_VAR)
 451         {
 452                 gcc_jit_lvalue * left = lvalue_from_item(ctx, item);
 453                 right = gcc_jit_lvalue_as_rvalue(left);
 454         }
 455         else if(item -> mode == MODE_INTEGER)
 456         {
 457                 gcc_jit_type * int_type = gcc_jit_context_get_type(gcc_context, GCC_JIT_TYPE_INT);
 458                 right = gcc_jit_context_new_rvalue_from_int(gcc_context, int_type, item -> integer);
 459         }
 460         else if(item -> mode == MODE_BOOLEAN)
 461         {
 462                 gcc_jit_type * bool_type = gcc_jit_context_get_type(gcc_context, GCC_JIT_TYPE_BOOL);
 463                 if(item -> boolean)
 464                 {
 465                         right = gcc_jit_context_one(gcc_context, bool_type);
 466                 }
 467                 else
 468                 {
 469                         right = gcc_jit_context_zero(gcc_context, bool_type);
 470                 }
 471         }
 472         else if(item -> mode == MODE_CALL)
 473         {
 474                 oberon_type_t * signature = item -> var -> type;
 475                 gen_proc_t * gen_proc = item -> var -> gen_proc;
 476
 477                 int num_args = item -> num_args;
 478                 gcc_jit_rvalue *args[num_args];
 479
 480                 oberon_expr_t * expr = item -> args;
 481                 oberon_object_t * arg_param = signature -> decl;
 482                 for(int i = 0; i < num_args; i++)
 483                 {
 484                         if(arg_param -> class == OBERON_CLASS_VAR_PARAM)
 485                         {
 486                                 gcc_jit_lvalue * left = lvalue_from_expr(ctx, expr);
 487                                 args[i] = gcc_jit_lvalue_get_address(left, NULL);
 488                         }
 489                         else
 490                         {
 491                                 args[i] = rvalue_from_expr(ctx, expr);
 492                         }
 493                         expr = expr -> next;
 494                         arg_param = arg_param -> next;
 495                 }
 496
 497                 gcc_jit_rvalue * fnptr;
 498                 gcc_jit_function * func;
 499                 switch(item -> var -> class)
 500                 {
 501                         case OBERON_CLASS_PROC:
 502                                 func = gen_proc -> gcc_func;
 503                                 right = gcc_jit_context_new_call(
 504                                         gcc_context, NULL, func, num_args, args
 505                                 );
 506                                 break;
 507                         case OBERON_CLASS_VAR:
 508                         case OBERON_CLASS_VAR_PARAM:
 509                         case OBERON_CLASS_PARAM:
 510                                 fnptr = gcc_jit_lvalue_as_rvalue(item -> var -> gen_var -> gcc_lvalue);
 511                                 right = gcc_jit_context_new_call_through_ptr(
 512                                         gcc_context, NULL, fnptr, num_args, args
 513                                 );
 514                                 break;
 515                         default:
 516                                 assert(0);
 517                                 break;
 518                 }
 519         }
 520         else if(item -> mode == MODE_INDEX)
 521         {
 522                 gcc_jit_lvalue * left = lvalue_from_item(ctx, item);
 523                 right = gcc_jit_lvalue_as_rvalue(left);
 524         }
 525         else if(item -> mode == MODE_FIELD)
 526         {
 527                 gen_var_t * gen_var = item -> var -> gen_var;
 528                 gcc_jit_field * gcc_field = gen_var -> gcc_field;
 529
 530                 gcc_jit_rvalue * parent = rvalue_from_item(ctx, item -> parent);
 531                 right = gcc_jit_rvalue_access_field(parent, NULL, gcc_field);
 532         }
 533         else if(item -> mode == MODE_DEREF)
 534         {
 535                 gcc_jit_lvalue * left = lvalue_from_item(ctx, item);
 536                 right = gcc_jit_lvalue_as_rvalue(left);
 537         }
 538         else if(item -> mode == MODE_NIL)
 539         {
 540                 gcc_jit_type * type = gcc_jit_context_get_type(gcc_context, GCC_JIT_TYPE_VOID_PTR);
 541                 right = gcc_jit_context_null(gcc_context, type);
 542         }
 543         else
 544         {
 545                 oberon_error(ctx, "rvalue_from_item: invalid mode %i", item -> mode);
 546         }
 547
 548         return right;
 549 }
 550
 551 struct {
 552         int type; // 0 - unary, 1 - binary, 2 - comp
 553         union {
 554                 enum gcc_jit_unary_op unary_op;
 555                 enum gcc_jit_binary_op binary_op;
 556                 enum gcc_jit_comparison comp_op;
 557         };
 558 } op_table[] = {
 559         { 0, .unary_op = GCC_JIT_UNARY_OP_MINUS },
 560         { 0, .unary_op = GCC_JIT_UNARY_OP_BITWISE_NEGATE },
 561         { 0, .unary_op = GCC_JIT_UNARY_OP_LOGICAL_NEGATE },
 562         { 0, .unary_op = GCC_JIT_UNARY_OP_ABS },
 563
 564         { 1, .binary_op = GCC_JIT_BINARY_OP_PLUS },
 565         { 1, .binary_op = GCC_JIT_BINARY_OP_MINUS },
 566         { 1, .binary_op = GCC_JIT_BINARY_OP_MULT },
 567         { 1, .binary_op = GCC_JIT_BINARY_OP_DIVIDE },
 568         { 1, .binary_op = GCC_JIT_BINARY_OP_MODULO },
 569         { 1, .binary_op = GCC_JIT_BINARY_OP_BITWISE_AND },
 570         { 1, .binary_op = GCC_JIT_BINARY_OP_BITWISE_XOR },
 571         { 1, .binary_op = GCC_JIT_BINARY_OP_BITWISE_OR },
 572         { 1, .binary_op = GCC_JIT_BINARY_OP_LOGICAL_AND },
 573         { 1, .binary_op = GCC_JIT_BINARY_OP_LOGICAL_OR },
 574
 575         { 2, .comp_op = GCC_JIT_COMPARISON_EQ },
 576         { 2, .comp_op = GCC_JIT_COMPARISON_NE },
 577         { 2, .comp_op = GCC_JIT_COMPARISON_LT },
 578         { 2, .comp_op = GCC_JIT_COMPARISON_LE },
 579         { 2, .comp_op = GCC_JIT_COMPARISON_GT },
 580         { 2, .comp_op = GCC_JIT_COMPARISON_GE }
 581 };
 582
 583 static gcc_jit_rvalue *
 584 rvalue_from_operator(oberon_context_t * ctx, oberon_oper_t * operator)
 585 {
 586         gcc_jit_rvalue * right;
 587
 588         gen_context_t * gen_context = ctx -> gen_context;
 589         gen_type_t * gen_type = operator -> result -> gen_type;
 590         gcc_jit_context * gcc_context = gen_context -> gcc_context;
 591         gcc_jit_type * result_type = gen_type -> gcc_type;
 592
 593         int expr_type = op_table[operator -> op].type;
 594         if(expr_type == 0)
 595         {
 596                 enum gcc_jit_unary_op op = op_table[operator -> op].unary_op;
 597                 gcc_jit_rvalue * l = rvalue_from_expr(ctx, operator -> left);
 598                 right = gcc_jit_context_new_unary_op(gcc_context, NULL, op, result_type, l);
 599         }
 600         else if(expr_type == 1)
 601         {
 602                 enum gcc_jit_unary_op op = op_table[operator -> op].binary_op;
 603                 gcc_jit_rvalue * l = rvalue_from_expr(ctx, operator -> left);
 604                 gcc_jit_rvalue * r = rvalue_from_expr(ctx, operator -> right);
 605                 right = gcc_jit_context_new_binary_op(gcc_context, NULL, op, result_type, l, r);
 606         }
 607         else if(expr_type == 2)
 608         {
 609                 enum gcc_jit_comparison op = op_table[operator -> op].comp_op;
 610                 gcc_jit_rvalue * l = rvalue_from_expr(ctx, operator -> left);
 611                 gcc_jit_rvalue * r = rvalue_from_expr(ctx, operator -> right);
 612                 right = gcc_jit_context_new_comparison(gcc_context, NULL, op, l, r);
 613         }
 614         else
 615         {
 616                 oberon_error(ctx, "rvalue_from_operator: wat");
 617         }
 618
 619         return right;
 620 }
 621
 622 static gcc_jit_rvalue *
 623 rvalue_from_expr(oberon_context_t * ctx, oberon_expr_t * expr)
 624 {
 625         gcc_jit_rvalue * right;
 626
 627         if(expr -> is_item)
 628         {
 629                 oberon_item_t * item = (oberon_item_t *) expr;
 630                 right = rvalue_from_item(ctx, item);
 631         }
 632         else
 633         {
 634                 oberon_oper_t * operator = (oberon_oper_t *) expr;
 635                 right = rvalue_from_operator(ctx, operator);
 636         }
 637
 638         return right;
 639 }
 640
 641 void
 642 oberon_generate_assign(oberon_context_t * ctx, oberon_expr_t * src, oberon_expr_t * dst)
 643 {
 644         gcc_jit_lvalue * left;
 645         left = lvalue_from_expr(ctx, dst);
 646
 647         gcc_jit_rvalue * right;
 648         right = rvalue_from_expr(ctx, src);
 649
 650         if(src -> is_item)
 651         {
 652                 if(src -> item.mode == MODE_NIL)
 653                 {
 654                         gen_context_t * gen_context = ctx -> gen_context;
 655                         gcc_jit_context * gcc_context = gen_context -> gcc_context;
 656                         gen_type_t * gen_type = dst -> result -> gen_type;
 657                         gcc_jit_type * cast_to_type = gen_type -> gcc_type;
 658                         right = gcc_jit_context_new_cast(gcc_context, NULL, right, cast_to_type);
 659                 }
 660         }
 661
 662         printf("oberon_generate_assign: class %i := class %i\n", dst -> result -> class, src -> result -> class);
 663
 664         gen_context_t * gen_context = ctx -> gen_context;
 665         gen_block_t * gen_block = gen_context -> block;
 666         gcc_jit_block * gcc_block = gen_block -> gcc_block;
 667         gcc_jit_block_add_assignment(gcc_block, NULL, left, right);
 668 }
 669
 670 void
 671 oberon_generate_code(oberon_context_t * ctx)
 672 {
 673         gen_context_t * gen_context = ctx -> gen_context;
 674         gcc_jit_context * gcc_context = gen_context -> gcc_context;
 675
 676         gcc_jit_result * gcc_result;
 677         gcc_result = gcc_jit_context_compile(gcc_context);
 678
 679         gen_context -> gcc_result = gcc_result;
 680
 681 //      ctx -> mod -> begin = gcc_jit_result_get_code(gcc_result, "BEGIN");
 682 }
 683
 684 void
 685 oberon_generator_dump(oberon_context_t * ctx, char * path)
 686 {
 687         gen_context_t * gen_context = ctx -> gen_context;
 688         gcc_jit_context * gcc_context = gen_context -> gcc_context;
 689         gcc_jit_context_dump_to_file(gcc_context, path, 0);
 690 }
 691
 692 void *
 693 oberon_generator_get_procedure(oberon_context_t * ctx, const char * name)
 694 {
 695         gen_context_t * gen_context = ctx -> gen_context;
 696         gcc_jit_result * gcc_result = gen_context -> gcc_result;
 697
 698         return gcc_jit_result_get_code(gcc_result, name);
 699 }
 700
 701 void *
 702 oberon_generator_get_var(oberon_context_t * ctx, const char * name)
 703 {
 704         gen_context_t * gen_context = ctx -> gen_context;
 705         gcc_jit_result * gcc_result = gen_context -> gcc_result;
 706
 707         return gcc_jit_result_get_global(gcc_result, name);
 708 }