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 * x)
 157 {
 158         if(!x)
 159         {
 160                 name[0] = 0;
 161                 return;
 162         }
 163
 164         int add_module_prefix;
 165         switch(x -> class)
 166         {
 167                 case OBERON_CLASS_FIELD:
 168                 case OBERON_CLASS_PARAM:
 169                 case OBERON_CLASS_VAR_PARAM:
 170                         /* В локальных областях префиксы излишни */
 171                         add_module_prefix = 0;
 172                         break;
 173                 default:
 174                         add_module_prefix = 1;
 175                         break;
 176         }
 177
 178         char parent[256];
 179         oberon_generator_get_full_name(parent, 256, x -> parent);
 180
 181         if(strlen(parent) > 0)
 182         {
 183                 snprintf(name, max_len, "%s_%s", parent, x -> name);
 184         }
 185         else if(add_module_prefix)
 186         {
 187                 snprintf(name, max_len, "%s_%s", x -> module -> name, x -> name);
 188         }
 189         else
 190         {
 191                 snprintf(name, max_len, "%s", x -> name);
 192         }
 193 }
 194
 195 void
 196 oberon_generator_init_var(oberon_context_t * ctx, oberon_object_t * var)
 197 {
 198         gen_context_t * gen_context = ctx -> gen_context;
 199         gen_type_t * gen_type = var -> type -> gen_type;
 200
 201         gen_var_t * gen_var = malloc(sizeof *gen_var);
 202         memset(gen_var, 0, sizeof *gen_var);
 203         var -> gen_var = gen_var;
 204
 205         gcc_jit_context * gcc_context = gen_context -> gcc_context;
 206         gcc_jit_type * gcc_type = gen_type -> gcc_type;
 207
 208         char name[256];
 209         oberon_generator_get_full_name(name, 256, var);
 210
 211         gcc_jit_lvalue * gcc_lvalue = NULL;
 212         gcc_jit_param * gcc_param = NULL;
 213         gcc_jit_field * gcc_field = NULL;
 214         if(var -> class == OBERON_CLASS_VAR)
 215         {
 216                 if(var -> local)
 217                 {
 218                         gen_proc_t * gen_func = var -> parent -> gen_proc;
 219                         gcc_jit_function * func = gen_func -> gcc_func;
 220
 221                         gcc_lvalue = gcc_jit_function_new_local(func, NULL, gcc_type, name);
 222                 }
 223                 else
 224                 {
 225                         gcc_lvalue = gcc_jit_context_new_global(
 226                                 gcc_context, NULL, GCC_JIT_GLOBAL_INTERNAL, gcc_type, name
 227                         );
 228                 }
 229         }
 230         else if(var -> class == OBERON_CLASS_PARAM)
 231         {
 232                 gcc_param = gcc_jit_context_new_param(gcc_context, NULL, gcc_type, name);
 233                 gcc_lvalue = gcc_jit_param_as_lvalue(gcc_param);
 234         }
 235         else if(var -> class == OBERON_CLASS_VAR_PARAM)
 236         {
 237                 gcc_type = gcc_jit_type_get_pointer(gcc_type);
 238                 gcc_param = gcc_jit_context_new_param(gcc_context, NULL, gcc_type, name);
 239                 gcc_lvalue = gcc_jit_param_as_lvalue(gcc_param);
 240         }
 241         else if(var -> class == OBERON_CLASS_FIELD)
 242         {
 243                 gcc_field = gcc_jit_context_new_field(gcc_context, NULL, gcc_type, name);
 244         }
 245         else
 246         {
 247                 oberon_error(ctx, "oberon_generator_init_var: invalid class %i", var -> class);
 248         }
 249
 250         gen_var -> gcc_lvalue = gcc_lvalue;
 251         gen_var -> gcc_param = gcc_param;
 252         gen_var -> gcc_field = gcc_field;
 253 }
 254
 255 void
 256 oberon_generator_init_proc(oberon_context_t * ctx, oberon_object_t * proc)
 257 {
 258         if(proc -> local)
 259         {
 260                 oberon_error(ctx, "generator: local procedures not supported");
 261         }
 262
 263         gen_context_t * gen_context = ctx -> gen_context;
 264         gcc_jit_context * gcc_context = gen_context -> gcc_context;
 265
 266         gen_proc_t * gen_proc = malloc(sizeof *gen_proc);
 267         memset(gen_proc, 0, sizeof *gen_proc);
 268         proc -> gen_proc = gen_proc;
 269
 270         char name[256];
 271         oberon_generator_get_full_name(name, 256, proc);
 272
 273         gen_type_t * gen_result_type = proc -> type -> base -> gen_type;
 274         gcc_jit_type * result_type = gen_result_type -> gcc_type;
 275
 276         /* Строим список параметров */
 277         int num_param = proc -> type -> num_decl;
 278         oberon_object_t * o = proc -> type -> decl;
 279         gcc_jit_param * params[num_param];
 280         for(int i = 0; i < num_param; i++)
 281         {
 282                 gen_var_t * param_var = o -> gen_var;
 283                 params[i] = param_var -> gcc_param;
 284                 o = o -> next;
 285         }
 286
 287         gcc_jit_function * gcc_func;
 288         gcc_func = gcc_jit_context_new_function(
 289                 gcc_context, NULL, GCC_JIT_FUNCTION_EXPORTED, result_type, name, num_param, params, 0
 290         );
 291
 292         gen_proc -> gcc_func = gcc_func;
 293 }
 294
 295 // =======================================================================
 296 //   GENERATOR
 297 // =======================================================================
 298
 299 static gcc_jit_rvalue * rvalue_from_item(oberon_context_t * ctx, oberon_item_t * item);
 300 static gcc_jit_rvalue * rvalue_from_expr(oberon_context_t * ctx, oberon_expr_t * expr);
 301
 302 void
 303 oberon_generate_begin_module(oberon_context_t * ctx)
 304 {
 305         gen_context_t * gen_context = ctx -> gen_context;
 306         gcc_jit_context * gcc_context = gen_context -> gcc_context;
 307
 308         char name[256];
 309         snprintf(name, 256, "%s_BEGIN", ctx -> mod -> name);
 310
 311         gcc_jit_type * void_type = gcc_jit_context_get_type(gcc_context, GCC_JIT_TYPE_VOID);
 312         gcc_jit_function * func = gcc_jit_context_new_function(
 313                 gcc_context, NULL, GCC_JIT_FUNCTION_EXPORTED, void_type, name, 0, NULL, 0
 314         );
 315         gcc_jit_block * gcc_block = gcc_jit_function_new_block(func, NULL);
 316
 317         oberon_generator_open_block(gen_context, gcc_block);
 318 }
 319
 320 void
 321 oberon_generate_end_module(oberon_context_t * ctx)
 322 {
 323         gen_context_t * gen_context = ctx -> gen_context;
 324         gcc_jit_block * gcc_block = gen_context -> block -> gcc_block;
 325
 326         gcc_jit_block_end_with_void_return(gcc_block, NULL);
 327
 328         oberon_generator_close_block(gen_context);
 329 }
 330
 331 void
 332 oberon_generate_begin_proc(oberon_context_t * ctx, oberon_object_t * proc)
 333 {
 334         gen_context_t * gen_context = ctx -> gen_context;
 335         gen_proc_t * gen_proc = proc -> gen_proc;
 336
 337         gcc_jit_function * func = gen_proc -> gcc_func;
 338         gcc_jit_block * gcc_block = gcc_jit_function_new_block(func, NULL);
 339
 340         oberon_generator_open_block(gen_context, gcc_block);
 341 }
 342
 343 void
 344 oberon_generate_call_proc(oberon_context_t * ctx, oberon_expr_t * desig)
 345 {
 346         gen_context_t * gen_context = ctx -> gen_context;
 347         gen_block_t * gen_block = gen_context -> block;
 348         gcc_jit_block * block = gen_block -> gcc_block;
 349
 350         gcc_jit_rvalue * return_value;
 351         return_value = rvalue_from_expr(ctx, desig);
 352         gcc_jit_block_add_eval(block, NULL, return_value);
 353 }
 354
 355 void
 356 oberon_generate_end_proc(oberon_context_t * ctx)
 357 {
 358         gen_context_t * gen_context = ctx -> gen_context;
 359         oberon_generator_close_block(gen_context);
 360 }
 361
 362 void
 363 oberon_generate_return(oberon_context_t * ctx, oberon_expr_t * expr)
 364 {
 365         gen_context_t * gen_context = ctx -> gen_context;
 366         gen_block_t * gen_block = gen_context -> block;
 367         gcc_jit_block * gcc_block = gen_block -> gcc_block;
 368
 369         if(expr == NULL)
 370         {
 371                 gcc_jit_block_end_with_void_return(gcc_block, NULL);
 372         }
 373         else
 374         {
 375                 gcc_jit_rvalue * r = rvalue_from_expr(ctx, expr);
 376                 gcc_jit_block_end_with_return(gcc_block, NULL, r);
 377         }
 378 }
 379
 380 static gcc_jit_lvalue *
 381 lvalue_from_item(oberon_context_t * ctx, oberon_item_t * item)
 382 {
 383         gen_context_t * gen_context = ctx -> gen_context;
 384         gcc_jit_context * gcc_context = gen_context -> gcc_context;
 385
 386         gcc_jit_lvalue * left;
 387
 388         if(item -> mode == MODE_VAR)
 389         {
 390                 if(item -> var -> class == OBERON_CLASS_PROC)
 391                 {
 392                         oberon_error(ctx, "casting static procedure to pointer not supported by generator");
 393                 }
 394
 395                 gen_var_t * gen_var = item -> var -> gen_var;
 396                 left = gen_var -> gcc_lvalue;
 397                 if(item -> var -> class == OBERON_CLASS_VAR_PARAM)
 398                 {
 399                         gcc_jit_rvalue * r = gcc_jit_lvalue_as_rvalue(left);
 400                         left = gcc_jit_rvalue_dereference(r, NULL);
 401                 }
 402         }
 403         else if(item -> mode == MODE_INDEX)
 404         {
 405                 assert(item -> num_args == 1);
 406                 gcc_jit_rvalue * parent = rvalue_from_item(ctx, item -> parent);
 407                 gcc_jit_rvalue * index = rvalue_from_expr(ctx, item -> args);
 408                 left = gcc_jit_context_new_array_access(gcc_context, NULL, parent, index);
 409         }
 410         else if(item -> mode == MODE_FIELD)
 411         {
 412                 printf("lvalue_from_item: %s\n", item -> var -> name);
 413                 gen_var_t * gen_var = item -> var -> gen_var;
 414                 gcc_jit_field * gcc_field = gen_var -> gcc_field;
 415
 416                 gcc_jit_lvalue * parent = lvalue_from_item(ctx, item -> parent);
 417                 left = gcc_jit_lvalue_access_field(parent, NULL, gcc_field);
 418         }
 419         else if(item -> mode == MODE_DEREF)
 420         {
 421                 gcc_jit_rvalue * parent = rvalue_from_item(ctx, item -> parent);
 422                 left = gcc_jit_rvalue_dereference(parent, NULL);
 423         }
 424         else
 425         {
 426                 oberon_error(ctx, "invalid lvalue expression");
 427         }
 428
 429         return left;
 430 }
 431
 432 static gcc_jit_lvalue *
 433 lvalue_from_expr(oberon_context_t *ctx, oberon_expr_t * expr)
 434 {
 435         gcc_jit_lvalue * left;
 436         oberon_item_t * item;
 437
 438         if(expr -> is_item)
 439         {
 440                 item = (oberon_item_t *) expr;
 441                 left = lvalue_from_item(ctx, item);
 442         }
 443         else
 444         {
 445                 oberon_error(ctx, "invalid lvalue expression");
 446         }
 447
 448         return left;
 449 }
 450
 451 static gcc_jit_rvalue *
 452 rvalue_from_item(oberon_context_t * ctx, oberon_item_t * item)
 453 {
 454         gen_context_t * gen_context = ctx -> gen_context;
 455         gcc_jit_context * gcc_context = gen_context -> gcc_context;
 456
 457         gcc_jit_rvalue * right;
 458         if(item -> mode == MODE_VAR)
 459         {
 460                 gcc_jit_lvalue * left = lvalue_from_item(ctx, item);
 461                 right = gcc_jit_lvalue_as_rvalue(left);
 462         }
 463         else if(item -> mode == MODE_INTEGER)
 464         {
 465                 gcc_jit_type * int_type = gcc_jit_context_get_type(gcc_context, GCC_JIT_TYPE_INT);
 466                 right = gcc_jit_context_new_rvalue_from_int(gcc_context, int_type, item -> integer);
 467         }
 468         else if(item -> mode == MODE_BOOLEAN)
 469         {
 470                 gcc_jit_type * bool_type = gcc_jit_context_get_type(gcc_context, GCC_JIT_TYPE_BOOL);
 471                 if(item -> boolean)
 472                 {
 473                         right = gcc_jit_context_one(gcc_context, bool_type);
 474                 }
 475                 else
 476                 {
 477                         right = gcc_jit_context_zero(gcc_context, bool_type);
 478                 }
 479         }
 480         else if(item -> mode == MODE_CALL)
 481         {
 482                 oberon_type_t * signature = item -> var -> type;
 483                 gen_proc_t * gen_proc = item -> var -> gen_proc;
 484
 485                 int num_args = item -> num_args;
 486                 gcc_jit_rvalue *args[num_args];
 487
 488                 oberon_expr_t * expr = item -> args;
 489                 oberon_object_t * arg_param = signature -> decl;
 490                 for(int i = 0; i < num_args; i++)
 491                 {
 492                         if(arg_param -> class == OBERON_CLASS_VAR_PARAM)
 493                         {
 494                                 gcc_jit_lvalue * left = lvalue_from_expr(ctx, expr);
 495                                 args[i] = gcc_jit_lvalue_get_address(left, NULL);
 496                         }
 497                         else
 498                         {
 499                                 args[i] = rvalue_from_expr(ctx, expr);
 500                         }
 501                         expr = expr -> next;
 502                         arg_param = arg_param -> next;
 503                 }
 504
 505                 gcc_jit_rvalue * fnptr;
 506                 gcc_jit_function * func;
 507                 switch(item -> var -> class)
 508                 {
 509                         case OBERON_CLASS_PROC:
 510                                 func = gen_proc -> gcc_func;
 511                                 right = gcc_jit_context_new_call(
 512                                         gcc_context, NULL, func, num_args, args
 513                                 );
 514                                 break;
 515                         case OBERON_CLASS_VAR:
 516                         case OBERON_CLASS_VAR_PARAM:
 517                         case OBERON_CLASS_PARAM:
 518                                 fnptr = gcc_jit_lvalue_as_rvalue(item -> var -> gen_var -> gcc_lvalue);
 519                                 right = gcc_jit_context_new_call_through_ptr(
 520                                         gcc_context, NULL, fnptr, num_args, args
 521                                 );
 522                                 break;
 523                         default:
 524                                 assert(0);
 525                                 break;
 526                 }
 527         }
 528         else if(item -> mode == MODE_INDEX)
 529         {
 530                 gcc_jit_lvalue * left = lvalue_from_item(ctx, item);
 531                 right = gcc_jit_lvalue_as_rvalue(left);
 532         }
 533         else if(item -> mode == MODE_FIELD)
 534         {
 535                 gen_var_t * gen_var = item -> var -> gen_var;
 536                 gcc_jit_field * gcc_field = gen_var -> gcc_field;
 537
 538                 gcc_jit_rvalue * parent = rvalue_from_item(ctx, item -> parent);
 539                 right = gcc_jit_rvalue_access_field(parent, NULL, gcc_field);
 540         }
 541         else if(item -> mode == MODE_DEREF)
 542         {
 543                 gcc_jit_lvalue * left = lvalue_from_item(ctx, item);
 544                 right = gcc_jit_lvalue_as_rvalue(left);
 545         }
 546         else if(item -> mode == MODE_NIL)
 547         {
 548                 gcc_jit_type * type = gcc_jit_context_get_type(gcc_context, GCC_JIT_TYPE_VOID_PTR);
 549                 right = gcc_jit_context_null(gcc_context, type);
 550         }
 551         else
 552         {
 553                 oberon_error(ctx, "rvalue_from_item: invalid mode %i", item -> mode);
 554         }
 555
 556         return right;
 557 }
 558
 559 struct {
 560         int type; // 0 - unary, 1 - binary, 2 - comp
 561         union {
 562                 enum gcc_jit_unary_op unary_op;
 563                 enum gcc_jit_binary_op binary_op;
 564                 enum gcc_jit_comparison comp_op;
 565         };
 566 } op_table[] = {
 567         { 0, .unary_op = GCC_JIT_UNARY_OP_MINUS },
 568         { 0, .unary_op = GCC_JIT_UNARY_OP_BITWISE_NEGATE },
 569         { 0, .unary_op = GCC_JIT_UNARY_OP_LOGICAL_NEGATE },
 570         { 0, .unary_op = GCC_JIT_UNARY_OP_ABS },
 571
 572         { 1, .binary_op = GCC_JIT_BINARY_OP_PLUS },
 573         { 1, .binary_op = GCC_JIT_BINARY_OP_MINUS },
 574         { 1, .binary_op = GCC_JIT_BINARY_OP_MULT },
 575         { 1, .binary_op = GCC_JIT_BINARY_OP_DIVIDE },
 576         { 1, .binary_op = GCC_JIT_BINARY_OP_MODULO },
 577         { 1, .binary_op = GCC_JIT_BINARY_OP_BITWISE_AND },
 578         { 1, .binary_op = GCC_JIT_BINARY_OP_BITWISE_XOR },
 579         { 1, .binary_op = GCC_JIT_BINARY_OP_BITWISE_OR },
 580         { 1, .binary_op = GCC_JIT_BINARY_OP_LOGICAL_AND },
 581         { 1, .binary_op = GCC_JIT_BINARY_OP_LOGICAL_OR },
 582
 583         { 2, .comp_op = GCC_JIT_COMPARISON_EQ },
 584         { 2, .comp_op = GCC_JIT_COMPARISON_NE },
 585         { 2, .comp_op = GCC_JIT_COMPARISON_LT },
 586         { 2, .comp_op = GCC_JIT_COMPARISON_LE },
 587         { 2, .comp_op = GCC_JIT_COMPARISON_GT },
 588         { 2, .comp_op = GCC_JIT_COMPARISON_GE }
 589 };
 590
 591 static gcc_jit_rvalue *
 592 rvalue_from_operator(oberon_context_t * ctx, oberon_oper_t * operator)
 593 {
 594         gcc_jit_rvalue * right;
 595
 596         gen_context_t * gen_context = ctx -> gen_context;
 597         gen_type_t * gen_type = operator -> result -> gen_type;
 598         gcc_jit_context * gcc_context = gen_context -> gcc_context;
 599         gcc_jit_type * result_type = gen_type -> gcc_type;
 600
 601         int expr_type = op_table[operator -> op].type;
 602         if(expr_type == 0)
 603         {
 604                 enum gcc_jit_unary_op op = op_table[operator -> op].unary_op;
 605                 gcc_jit_rvalue * l = rvalue_from_expr(ctx, operator -> left);
 606                 right = gcc_jit_context_new_unary_op(gcc_context, NULL, op, result_type, l);
 607         }
 608         else if(expr_type == 1)
 609         {
 610                 enum gcc_jit_unary_op op = op_table[operator -> op].binary_op;
 611                 gcc_jit_rvalue * l = rvalue_from_expr(ctx, operator -> left);
 612                 gcc_jit_rvalue * r = rvalue_from_expr(ctx, operator -> right);
 613                 right = gcc_jit_context_new_binary_op(gcc_context, NULL, op, result_type, l, r);
 614         }
 615         else if(expr_type == 2)
 616         {
 617                 enum gcc_jit_comparison op = op_table[operator -> op].comp_op;
 618                 gcc_jit_rvalue * l = rvalue_from_expr(ctx, operator -> left);
 619                 gcc_jit_rvalue * r = rvalue_from_expr(ctx, operator -> right);
 620                 right = gcc_jit_context_new_comparison(gcc_context, NULL, op, l, r);
 621         }
 622         else
 623         {
 624                 oberon_error(ctx, "rvalue_from_operator: wat");
 625         }
 626
 627         return right;
 628 }
 629
 630 static gcc_jit_rvalue *
 631 rvalue_from_expr(oberon_context_t * ctx, oberon_expr_t * expr)
 632 {
 633         gcc_jit_rvalue * right;
 634
 635         if(expr -> is_item)
 636         {
 637                 oberon_item_t * item = (oberon_item_t *) expr;
 638                 right = rvalue_from_item(ctx, item);
 639         }
 640         else
 641         {
 642                 oberon_oper_t * operator = (oberon_oper_t *) expr;
 643                 right = rvalue_from_operator(ctx, operator);
 644         }
 645
 646         return right;
 647 }
 648
 649 void
 650 oberon_generate_assign(oberon_context_t * ctx, oberon_expr_t * src, oberon_expr_t * dst)
 651 {
 652         gcc_jit_lvalue * left;
 653         left = lvalue_from_expr(ctx, dst);
 654
 655         gcc_jit_rvalue * right;
 656         right = rvalue_from_expr(ctx, src);
 657
 658         if(src -> is_item)
 659         {
 660                 if(src -> item.mode == MODE_NIL)
 661                 {
 662                         gen_context_t * gen_context = ctx -> gen_context;
 663                         gcc_jit_context * gcc_context = gen_context -> gcc_context;
 664                         gen_type_t * gen_type = dst -> result -> gen_type;
 665                         gcc_jit_type * cast_to_type = gen_type -> gcc_type;
 666                         right = gcc_jit_context_new_cast(gcc_context, NULL, right, cast_to_type);
 667                 }
 668         }
 669
 670         printf("oberon_generate_assign: class %i := class %i\n", dst -> result -> class, src -> result -> class);
 671
 672         gen_context_t * gen_context = ctx -> gen_context;
 673         gen_block_t * gen_block = gen_context -> block;
 674         gcc_jit_block * gcc_block = gen_block -> gcc_block;
 675         gcc_jit_block_add_assignment(gcc_block, NULL, left, right);
 676 }
 677
 678 void
 679 oberon_generate_code(oberon_context_t * ctx)
 680 {
 681         gen_context_t * gen_context = ctx -> gen_context;
 682         gcc_jit_context * gcc_context = gen_context -> gcc_context;
 683
 684         gcc_jit_result * gcc_result;
 685         gcc_result = gcc_jit_context_compile(gcc_context);
 686
 687         gen_context -> gcc_result = gcc_result;
 688
 689 //      ctx -> mod -> begin = gcc_jit_result_get_code(gcc_result, "BEGIN");
 690 }
 691
 692 void
 693 oberon_generator_dump(oberon_context_t * ctx, char * path)
 694 {
 695         gen_context_t * gen_context = ctx -> gen_context;
 696         gcc_jit_context * gcc_context = gen_context -> gcc_context;
 697         gcc_jit_context_dump_to_file(gcc_context, path, 0);
 698 }
 699
 700 void *
 701 oberon_generator_get_procedure(oberon_context_t * ctx, const char * name)
 702 {
 703         gen_context_t * gen_context = ctx -> gen_context;
 704         gcc_jit_result * gcc_result = gen_context -> gcc_result;
 705
 706         return gcc_jit_result_get_code(gcc_result, name);
 707 }
 708
 709 void *
 710 oberon_generator_get_var(oberon_context_t * ctx, const char * name)
 711 {
 712         gen_context_t * gen_context = ctx -> gen_context;
 713         gcc_jit_result * gcc_result = gen_context -> gcc_result;
 714
 715         return gcc_jit_result_get_global(gcc_result, name);
 716 }