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