sparse-llvm.c

   1 /*
   2  * Example usage:
   3  *      ./sparse-llvm hello.c | llc | as -o hello.o
   4  */
   5
   6 #include <llvm-c/Core.h>
   7 #include <llvm-c/BitWriter.h>
   8 #include <llvm-c/Analysis.h>
   9 #include <llvm-c/Target.h>
  10
  11 #include <stdbool.h>
  12 #include <stdio.h>
  13 #include <unistd.h>
  14 #include <string.h>
  15 #include <assert.h>
  16
  17 #include "symbol.h"
  18 #include "expression.h"
  19 #include "linearize.h"
  20 #include "flow.h"
  21
  22 struct function {
  23         LLVMBuilderRef                  builder;
  24         LLVMValueRef                    fn;
  25         LLVMModuleRef                   module;
  26 };
  27
  28 static LLVMTypeRef symbol_type(struct symbol *sym);
  29
  30 static LLVMTypeRef func_return_type(struct symbol *sym)
  31 {
  32         return symbol_type(sym->ctype.base_type);
  33 }
  34
  35 static LLVMTypeRef sym_func_type(struct symbol *sym)
  36 {
  37         int n_arg = symbol_list_size(sym->arguments);
  38         LLVMTypeRef *arg_type = calloc(n_arg, sizeof(LLVMTypeRef));
  39         LLVMTypeRef ret_type = func_return_type(sym);
  40         struct symbol *arg;
  41         int idx = 0;
  42
  43         FOR_EACH_PTR(sym->arguments, arg) {
  44                 struct symbol *arg_sym = arg->ctype.base_type;
  45
  46                 arg_type[idx++] = symbol_type(arg_sym);
  47         } END_FOR_EACH_PTR(arg);
  48
  49         return LLVMFunctionType(ret_type, arg_type, n_arg, sym->variadic);
  50 }
  51
  52 static LLVMTypeRef sym_array_type(struct symbol *sym)
  53 {
  54         LLVMTypeRef elem_type;
  55         struct symbol *base_type;
  56
  57         base_type = sym->ctype.base_type;
  58         /* empty struct is undefined [6.7.2.1(8)] */
  59         assert(base_type->bit_size > 0);
  60
  61         elem_type = symbol_type(base_type);
  62         if (!elem_type)
  63                 return NULL;
  64
  65         return LLVMArrayType(elem_type, sym->bit_size / base_type->bit_size);
  66 }
  67
  68 #define MAX_STRUCT_MEMBERS 64
  69
  70 static LLVMTypeRef sym_struct_type(struct symbol *sym)
  71 {
  72         LLVMTypeRef elem_types[MAX_STRUCT_MEMBERS];
  73         struct symbol *member;
  74         char buffer[256];
  75         LLVMTypeRef ret;
  76         unsigned nr = 0;
  77
  78         snprintf(buffer, sizeof(buffer), "struct.%s", sym->ident ? sym->ident->name : "anno");
  79         ret = LLVMStructCreateNamed(LLVMGetGlobalContext(), buffer);
  80         /* set ->aux to avoid recursion */
  81         sym->aux = ret;
  82
  83         FOR_EACH_PTR(sym->symbol_list, member) {
  84                 LLVMTypeRef member_type;
  85
  86                 assert(nr < MAX_STRUCT_MEMBERS);
  87
  88                 member_type = symbol_type(member);
  89
  90                 elem_types[nr++] = member_type;
  91         } END_FOR_EACH_PTR(member);
  92
  93         LLVMStructSetBody(ret, elem_types, nr, 0 /* packed? */);
  94         return ret;
  95 }
  96
  97 static LLVMTypeRef sym_union_type(struct symbol *sym)
  98 {
  99         LLVMTypeRef elements;
 100         unsigned union_size;
 101
 102         /*
 103          * There's no union support in the LLVM API so we treat unions as
 104          * opaque structs. The downside is that we lose type information on the
 105          * members but as LLVM doesn't care, neither do we.
 106          */
 107         union_size = sym->bit_size / 8;
 108
 109         elements = LLVMArrayType(LLVMInt8Type(), union_size);
 110
 111         return LLVMStructType(&elements, 1, 0 /* packed? */);
 112 }
 113
 114 static LLVMTypeRef sym_ptr_type(struct symbol *sym)
 115 {
 116         LLVMTypeRef type;
 117
 118         /* 'void *' is treated like 'char *' */
 119         if (is_void_type(sym->ctype.base_type))
 120                 type = LLVMInt8Type();
 121         else
 122                 type = symbol_type(sym->ctype.base_type);
 123
 124         return LLVMPointerType(type, 0);
 125 }
 126
 127 static LLVMTypeRef sym_basetype_type(struct symbol *sym)
 128 {
 129         LLVMTypeRef ret = NULL;
 130
 131         if (is_float_type(sym)) {
 132                 switch (sym->bit_size) {
 133                 case 32:
 134                         ret = LLVMFloatType();
 135                         break;
 136                 case 64:
 137                         ret = LLVMDoubleType();
 138                         break;
 139                 case 80:
 140                         ret = LLVMX86FP80Type();
 141                         break;
 142                 default:
 143                         die("invalid bit size %d for type %d", sym->bit_size, sym->type);
 144                         break;
 145                 }
 146         } else {
 147                 switch (sym->bit_size) {
 148                 case -1:
 149                         ret = LLVMVoidType();
 150                         break;
 151                 case 1:
 152                         ret = LLVMInt1Type();
 153                         break;
 154                 case 8:
 155                         ret = LLVMInt8Type();
 156                         break;
 157                 case 16:
 158                         ret = LLVMInt16Type();
 159                         break;
 160                 case 32:
 161                         ret = LLVMInt32Type();
 162                         break;
 163                 case 64:
 164                         ret = LLVMInt64Type();
 165                         break;
 166                 default:
 167                         die("invalid bit size %d for type %d", sym->bit_size, sym->type);
 168                         break;
 169                 }
 170         }
 171
 172         return ret;
 173 }
 174
 175 static LLVMTypeRef symbol_type(struct symbol *sym)
 176 {
 177         LLVMTypeRef ret = NULL;
 178
 179         /* don't cache the result for SYM_NODE */
 180         if (sym->type == SYM_NODE)
 181                 return symbol_type(sym->ctype.base_type);
 182
 183         if (sym->aux)
 184                 return sym->aux;
 185
 186         switch (sym->type) {
 187         case SYM_BITFIELD:
 188                 ret = LLVMIntType(sym->bit_size);
 189                 break;
 190         case SYM_RESTRICT:
 191         case SYM_ENUM:
 192                 ret = symbol_type(sym->ctype.base_type);
 193                 break;
 194         case SYM_BASETYPE:
 195                 ret = sym_basetype_type(sym);
 196                 break;
 197         case SYM_PTR:
 198                 ret = sym_ptr_type(sym);
 199                 break;
 200         case SYM_UNION:
 201                 ret = sym_union_type(sym);
 202                 break;
 203         case SYM_STRUCT:
 204                 ret = sym_struct_type(sym);
 205                 break;
 206         case SYM_ARRAY:
 207                 ret = sym_array_type(sym);
 208                 break;
 209         case SYM_FN:
 210                 ret = sym_func_type(sym);
 211                 break;
 212         default:
 213                 assert(0);
 214         }
 215
 216         /* cache the result */
 217         sym->aux = ret;
 218         return ret;
 219 }
 220
 221 static LLVMTypeRef insn_symbol_type(struct instruction *insn)
 222 {
 223         if (insn->type)
 224                 return symbol_type(insn->type);
 225
 226         switch (insn->size) {
 227                 case 8:         return LLVMInt8Type();
 228                 case 16:        return LLVMInt16Type();
 229                 case 32:        return LLVMInt32Type();
 230                 case 64:        return LLVMInt64Type();
 231
 232                 default:
 233                         die("invalid bit size %d", insn->size);
 234                         break;
 235         }
 236
 237         return NULL;    /* not reached */
 238 }
 239
 240 static LLVMLinkage data_linkage(struct symbol *sym)
 241 {
 242         if (sym->ctype.modifiers & MOD_STATIC)
 243                 return LLVMPrivateLinkage;
 244
 245         return LLVMExternalLinkage;
 246 }
 247
 248 static LLVMLinkage function_linkage(struct symbol *sym)
 249 {
 250         if (sym->ctype.modifiers & MOD_STATIC)
 251                 return LLVMInternalLinkage;
 252
 253         return LLVMExternalLinkage;
 254 }
 255
 256 #define MAX_PSEUDO_NAME 64
 257
 258 static const char *pseudo_name(pseudo_t pseudo, char *buf)
 259 {
 260         switch (pseudo->type) {
 261         case PSEUDO_REG:
 262                 snprintf(buf, MAX_PSEUDO_NAME, "R%d.", pseudo->nr);
 263                 break;
 264         case PSEUDO_PHI:
 265                 snprintf(buf, MAX_PSEUDO_NAME, "PHI%d.", pseudo->nr);
 266                 break;
 267         case PSEUDO_SYM:
 268         case PSEUDO_VAL:
 269         case PSEUDO_ARG:
 270         case PSEUDO_VOID:
 271                 buf[0] = '\0';
 272                 break;
 273         case PSEUDO_UNDEF:
 274                 assert(0);
 275                 break;
 276         default:
 277                 assert(0);
 278         }
 279
 280         return buf;
 281 }
 282
 283 static LLVMValueRef get_sym_value(LLVMModuleRef module, struct symbol *sym)
 284 {
 285         const char *name = show_ident(sym->ident);
 286         LLVMTypeRef type = symbol_type(sym);
 287         LLVMValueRef result = NULL;
 288         struct expression *expr;
 289
 290         assert(sym->bb_target == NULL);
 291
 292         expr = sym->initializer;
 293         if (expr && !sym->ident) {
 294                 switch (expr->type) {
 295                 case EXPR_STRING: {
 296                         const char *s = expr->string->data;
 297                         LLVMValueRef indices[] = { LLVMConstInt(LLVMInt64Type(), 0, 0), LLVMConstInt(LLVMInt64Type(), 0, 0) };
 298                         LLVMValueRef data;
 299
 300                         data = LLVMAddGlobal(module, LLVMArrayType(LLVMInt8Type(), strlen(s) + 1), ".str");
 301                         LLVMSetLinkage(data, LLVMPrivateLinkage);
 302                         LLVMSetGlobalConstant(data, 1);
 303                         LLVMSetInitializer(data, LLVMConstString(strdup(s), strlen(s) + 1, true));
 304
 305                         result = LLVMConstGEP(data, indices, ARRAY_SIZE(indices));
 306                         return result;
 307                 }
 308                 default:
 309                         break;
 310                 }
 311         }
 312
 313         if (LLVMGetTypeKind(type) == LLVMFunctionTypeKind) {
 314                 result = LLVMGetNamedFunction(module, name);
 315                 if (!result)
 316                         result = LLVMAddFunction(module, name, type);
 317         } else {
 318                 result = LLVMGetNamedGlobal(module, name);
 319                 if (!result)
 320                         result = LLVMAddGlobal(module, type, name);
 321         }
 322
 323         return result;
 324 }
 325
 326 static LLVMValueRef constant_value(unsigned long long val, LLVMTypeRef dtype)
 327 {
 328         LLVMValueRef result;
 329
 330         switch (LLVMGetTypeKind(dtype)) {
 331         case LLVMPointerTypeKind:
 332                 if (val != 0) {  // for example: ... = (void*) 0x123;
 333                         LLVMTypeRef itype = LLVMIntType(bits_in_pointer);
 334                         result = LLVMConstInt(itype, val, 1);
 335                         result = LLVMConstIntToPtr(result, dtype);
 336                 } else {
 337                         result = LLVMConstPointerNull(dtype);
 338                 }
 339                 break;
 340         case LLVMIntegerTypeKind:
 341                 result = LLVMConstInt(dtype, val, 1);
 342                 break;
 343         case LLVMArrayTypeKind:
 344         case LLVMStructTypeKind:
 345                 if (val != 0)
 346                         return NULL;
 347                 result = LLVMConstNull(dtype);
 348                 break;
 349         default:
 350                 return NULL;
 351         }
 352         return result;
 353 }
 354
 355 static LLVMValueRef val_to_value(unsigned long long val, struct symbol *ctype)
 356 {
 357         LLVMValueRef result;
 358         LLVMTypeRef dtype;
 359
 360         assert(ctype);
 361         dtype = symbol_type(ctype);
 362         result = constant_value(val, dtype);
 363         if (result)
 364                 return result;
 365         sparse_error(ctype->pos, "no value possible for %s", show_typename(ctype));
 366         return LLVMGetUndef(symbol_type(ctype));
 367 }
 368
 369 static LLVMValueRef pseudo_to_value(struct function *fn, struct symbol *ctype, pseudo_t pseudo)
 370 {
 371         LLVMValueRef result = NULL;
 372
 373         switch (pseudo->type) {
 374         case PSEUDO_REG:
 375                 result = pseudo->priv;
 376                 break;
 377         case PSEUDO_SYM:
 378                 result = get_sym_value(fn->module, pseudo->sym);
 379                 break;
 380         case PSEUDO_VAL:
 381                 result = val_to_value(pseudo->value, ctype);
 382                 break;
 383         case PSEUDO_ARG: {
 384                 result = LLVMGetParam(fn->fn, pseudo->nr - 1);
 385                 break;
 386         }
 387         case PSEUDO_PHI:
 388                 result = pseudo->priv;
 389                 break;
 390         case PSEUDO_VOID:
 391                 result = NULL;
 392                 break;
 393         case PSEUDO_UNDEF:
 394                 result = LLVMGetUndef(symbol_type(ctype));
 395                 break;
 396         default:
 397                 assert(0);
 398         }
 399
 400         return result;
 401 }
 402
 403 static LLVMValueRef pseudo_to_rvalue(struct function *fn, struct symbol *ctype, pseudo_t pseudo)
 404 {
 405         LLVMValueRef val = pseudo_to_value(fn, ctype, pseudo);
 406         LLVMTypeRef dtype = symbol_type(ctype);
 407         char name[MAX_PSEUDO_NAME];
 408
 409         pseudo_name(pseudo, name);
 410         return LLVMBuildBitCast(fn->builder, val, dtype, name);
 411 }
 412
 413 static LLVMValueRef value_to_ivalue(struct function *fn, struct symbol *ctype, LLVMValueRef val)
 414 {
 415         const char *name = LLVMGetValueName(val);
 416         LLVMTypeRef dtype = symbol_type(ctype);
 417
 418         if (LLVMGetTypeKind(LLVMTypeOf(val)) == LLVMPointerTypeKind) {
 419                 LLVMTypeRef dtype = LLVMIntType(bits_in_pointer);
 420                 val = LLVMBuildPtrToInt(fn->builder, val, dtype, name);
 421         }
 422         if (ctype && is_int_type(ctype)) {
 423                 val = LLVMBuildIntCast(fn->builder, val, dtype, name);
 424         }
 425         return val;
 426 }
 427
 428 static LLVMValueRef value_to_pvalue(struct function *fn, struct symbol *ctype, LLVMValueRef val)
 429 {
 430         const char *name = LLVMGetValueName(val);
 431         LLVMTypeRef dtype = symbol_type(ctype);
 432
 433         assert(is_ptr_type(ctype));
 434         switch (LLVMGetTypeKind(LLVMTypeOf(val))) {
 435         case LLVMIntegerTypeKind:
 436                 val = LLVMBuildIntToPtr(fn->builder, val, dtype, name);
 437                 break;
 438         case LLVMPointerTypeKind:
 439                 val = LLVMBuildBitCast(fn->builder, val, dtype, name);
 440                 break;
 441         default:
 442                 break;
 443         }
 444         return val;
 445 }
 446
 447 static LLVMValueRef adjust_type(struct function *fn, struct symbol *ctype, LLVMValueRef val)
 448 {
 449         if (is_int_type(ctype))
 450                 return value_to_ivalue(fn, ctype, val);
 451         if (is_ptr_type(ctype))
 452                 return value_to_pvalue(fn, ctype, val);
 453         return val;
 454 }
 455
 456 /*
 457  * Get the LLVMValue corresponding to the pseudo
 458  * and force the type corresponding to ctype.
 459  */
 460 static LLVMValueRef get_operand(struct function *fn, struct symbol *ctype, pseudo_t pseudo)
 461 {
 462         LLVMValueRef target = pseudo_to_value(fn, ctype, pseudo);
 463         return adjust_type(fn, ctype, target);
 464 }
 465
 466 /*
 467  * Get the LLVMValue corresponding to the pseudo
 468  * and force the type corresponding to ctype but
 469  * map all pointers to intptr_t.
 470  */
 471 static LLVMValueRef get_ioperand(struct function *fn, struct symbol *ctype, pseudo_t pseudo)
 472 {
 473         LLVMValueRef target = pseudo_to_value(fn, ctype, pseudo);
 474         return value_to_ivalue(fn, ctype, target);
 475 }
 476
 477 static LLVMValueRef calc_gep(LLVMBuilderRef builder, LLVMValueRef base, LLVMValueRef off)
 478 {
 479         LLVMTypeRef type = LLVMTypeOf(base);
 480         unsigned int as = LLVMGetPointerAddressSpace(type);
 481         LLVMTypeRef bytep = LLVMPointerType(LLVMInt8Type(), as);
 482         LLVMValueRef addr;
 483         const char *name = LLVMGetValueName(off);
 484
 485         /* convert base to char* type */
 486         base = LLVMBuildPointerCast(builder, base, bytep, name);
 487         /* addr = base + off */
 488         addr = LLVMBuildInBoundsGEP(builder, base, &off, 1, name);
 489         /* convert back to the actual pointer type */
 490         addr = LLVMBuildPointerCast(builder, addr, type, name);
 491         return addr;
 492 }
 493
 494 static LLVMRealPredicate translate_fop(int opcode)
 495 {
 496         static const LLVMRealPredicate trans_tbl[] = {
 497                 [OP_FCMP_ORD]   = LLVMRealORD,
 498                 [OP_FCMP_OEQ]   = LLVMRealOEQ,
 499                 [OP_FCMP_ONE]   = LLVMRealONE,
 500                 [OP_FCMP_OLE]   = LLVMRealOLE,
 501                 [OP_FCMP_OGE]   = LLVMRealOGE,
 502                 [OP_FCMP_OLT]   = LLVMRealOLT,
 503                 [OP_FCMP_OGT]   = LLVMRealOGT,
 504                 [OP_FCMP_UEQ]   = LLVMRealUEQ,
 505                 [OP_FCMP_UNE]   = LLVMRealUNE,
 506                 [OP_FCMP_ULE]   = LLVMRealULE,
 507                 [OP_FCMP_UGE]   = LLVMRealUGE,
 508                 [OP_FCMP_ULT]   = LLVMRealULT,
 509                 [OP_FCMP_UGT]   = LLVMRealUGT,
 510                 [OP_FCMP_UNO]   = LLVMRealUNO,
 511         };
 512
 513         return trans_tbl[opcode];
 514 }
 515
 516 static LLVMIntPredicate translate_op(int opcode)
 517 {
 518         static const LLVMIntPredicate trans_tbl[] = {
 519                 [OP_SET_EQ]     = LLVMIntEQ,
 520                 [OP_SET_NE]     = LLVMIntNE,
 521                 [OP_SET_LE]     = LLVMIntSLE,
 522                 [OP_SET_GE]     = LLVMIntSGE,
 523                 [OP_SET_LT]     = LLVMIntSLT,
 524                 [OP_SET_GT]     = LLVMIntSGT,
 525                 [OP_SET_B]      = LLVMIntULT,
 526                 [OP_SET_A]      = LLVMIntUGT,
 527                 [OP_SET_BE]     = LLVMIntULE,
 528                 [OP_SET_AE]     = LLVMIntUGE,
 529         };
 530
 531         return trans_tbl[opcode];
 532 }
 533
 534 static void output_op_binary(struct function *fn, struct instruction *insn)
 535 {
 536         LLVMValueRef lhs, rhs, target;
 537         char target_name[64];
 538
 539         lhs = get_ioperand(fn, insn->type, insn->src1);
 540         rhs = get_ioperand(fn, insn->type, insn->src2);
 541
 542         pseudo_name(insn->target, target_name);
 543
 544         switch (insn->opcode) {
 545         /* Binary */
 546         case OP_ADD:
 547                 target = LLVMBuildAdd(fn->builder, lhs, rhs, target_name);
 548                 break;
 549         case OP_SUB:
 550                 target = LLVMBuildSub(fn->builder, lhs, rhs, target_name);
 551                 break;
 552         case OP_MUL:
 553                 target = LLVMBuildMul(fn->builder, lhs, rhs, target_name);
 554                 break;
 555         case OP_DIVU:
 556                 target = LLVMBuildUDiv(fn->builder, lhs, rhs, target_name);
 557                 break;
 558         case OP_DIVS:
 559                 assert(!is_float_type(insn->type));
 560                 target = LLVMBuildSDiv(fn->builder, lhs, rhs, target_name);
 561                 break;
 562         case OP_MODU:
 563                 assert(!is_float_type(insn->type));
 564                 target = LLVMBuildURem(fn->builder, lhs, rhs, target_name);
 565                 break;
 566         case OP_MODS:
 567                 assert(!is_float_type(insn->type));
 568                 target = LLVMBuildSRem(fn->builder, lhs, rhs, target_name);
 569                 break;
 570         case OP_SHL:
 571                 assert(!is_float_type(insn->type));
 572                 target = LLVMBuildShl(fn->builder, lhs, rhs, target_name);
 573                 break;
 574         case OP_LSR:
 575                 assert(!is_float_type(insn->type));
 576                 target = LLVMBuildLShr(fn->builder, lhs, rhs, target_name);
 577                 break;
 578         case OP_ASR:
 579                 assert(!is_float_type(insn->type));
 580                 target = LLVMBuildAShr(fn->builder, lhs, rhs, target_name);
 581                 break;
 582
 583         /* floating-point */
 584         case OP_FADD:
 585                 target = LLVMBuildFAdd(fn->builder, lhs, rhs, target_name);
 586                 break;
 587         case OP_FSUB:
 588                 target = LLVMBuildFSub(fn->builder, lhs, rhs, target_name);
 589                 break;
 590         case OP_FMUL:
 591                 target = LLVMBuildFMul(fn->builder, lhs, rhs, target_name);
 592                 break;
 593         case OP_FDIV:
 594                 target = LLVMBuildFDiv(fn->builder, lhs, rhs, target_name);
 595                 break;
 596
 597         /* Logical */
 598         case OP_AND:
 599                 assert(!is_float_type(insn->type));
 600                 target = LLVMBuildAnd(fn->builder, lhs, rhs, target_name);
 601                 break;
 602         case OP_OR:
 603                 assert(!is_float_type(insn->type));
 604                 target = LLVMBuildOr(fn->builder, lhs, rhs, target_name);
 605                 break;
 606         case OP_XOR:
 607                 assert(!is_float_type(insn->type));
 608                 target = LLVMBuildXor(fn->builder, lhs, rhs, target_name);
 609                 break;
 610         default:
 611                 assert(0);
 612                 break;
 613         }
 614
 615         target = adjust_type(fn, insn->type, target);
 616         insn->target->priv = target;
 617 }
 618
 619 static void output_op_compare(struct function *fn, struct instruction *insn)
 620 {
 621         LLVMValueRef lhs, rhs, target;
 622         char target_name[64];
 623
 624         lhs = pseudo_to_value(fn, NULL, insn->src1);
 625         if (insn->src2->type == PSEUDO_VAL)
 626                 rhs = constant_value(insn->src2->value, LLVMTypeOf(lhs));
 627         else
 628                 rhs = pseudo_to_value(fn, NULL, insn->src2);
 629         if (!rhs)
 630                 rhs = LLVMGetUndef(symbol_type(insn->type));
 631
 632         pseudo_name(insn->target, target_name);
 633
 634         LLVMTypeRef dst_type = insn_symbol_type(insn);
 635
 636         switch  (LLVMGetTypeKind(LLVMTypeOf(lhs))) {
 637         case LLVMPointerTypeKind:
 638                 lhs = value_to_pvalue(fn, &ptr_ctype, lhs);
 639                 rhs = value_to_pvalue(fn, &ptr_ctype, rhs);
 640                 /* fall through */
 641
 642         case LLVMIntegerTypeKind: {
 643                 LLVMIntPredicate op = translate_op(insn->opcode);
 644
 645                 if (LLVMGetTypeKind(LLVMTypeOf(rhs)) == LLVMPointerTypeKind) {
 646                         LLVMTypeRef ltype = LLVMTypeOf(lhs);
 647                         rhs = LLVMBuildPtrToInt(fn->builder, rhs, ltype, "");
 648                 }
 649                 target = LLVMBuildICmp(fn->builder, op, lhs, rhs, target_name);
 650                 break;
 651         }
 652         case LLVMHalfTypeKind:
 653         case LLVMFloatTypeKind:
 654         case LLVMDoubleTypeKind:
 655         case LLVMX86_FP80TypeKind:
 656         case LLVMFP128TypeKind:
 657         case LLVMPPC_FP128TypeKind: {
 658                 LLVMRealPredicate op = translate_fop(insn->opcode);
 659
 660                 target = LLVMBuildFCmp(fn->builder, op, lhs, rhs, target_name);
 661                 break;
 662         }
 663         default:
 664                 assert(0);
 665         }
 666
 667         target = LLVMBuildZExt(fn->builder, target, dst_type, target_name);
 668
 669         insn->target->priv = target;
 670 }
 671
 672 static void output_op_ret(struct function *fn, struct instruction *insn)
 673 {
 674         pseudo_t pseudo = insn->src;
 675
 676         if (pseudo && pseudo != VOID) {
 677                 LLVMValueRef result = get_operand(fn, insn->type, pseudo);
 678                 LLVMBuildRet(fn->builder, result);
 679         } else
 680                 LLVMBuildRetVoid(fn->builder);
 681 }
 682
 683 static LLVMValueRef calc_memop_addr(struct function *fn, struct instruction *insn)
 684 {
 685         LLVMTypeRef int_type, addr_type;
 686         LLVMValueRef src, off, addr;
 687         unsigned int as;
 688
 689         /* int type large enough to hold a pointer */
 690         int_type = LLVMIntType(bits_in_pointer);
 691         off = LLVMConstInt(int_type, insn->offset, 0);
 692
 693         /* convert src to the effective pointer type */
 694         src = pseudo_to_value(fn, insn->type, insn->src);
 695         as = LLVMGetPointerAddressSpace(LLVMTypeOf(src));
 696         addr_type = LLVMPointerType(insn_symbol_type(insn), as);
 697         src = LLVMBuildPointerCast(fn->builder, src, addr_type, LLVMGetValueName(src));
 698
 699         /* addr = src + off */
 700         addr = calc_gep(fn->builder, src, off);
 701         return addr;
 702 }
 703
 704
 705 static void output_op_load(struct function *fn, struct instruction *insn)
 706 {
 707         LLVMValueRef addr, target;
 708         char name[MAX_PSEUDO_NAME];
 709
 710         addr = calc_memop_addr(fn, insn);
 711
 712         /* perform load */
 713         pseudo_name(insn->target, name);
 714         target = LLVMBuildLoad(fn->builder, addr, name);
 715
 716         insn->target->priv = target;
 717 }
 718
 719 static void output_op_store(struct function *fn, struct instruction *insn)
 720 {
 721         LLVMValueRef addr, target_in;
 722
 723         addr = calc_memop_addr(fn, insn);
 724
 725         target_in = pseudo_to_rvalue(fn, insn->type, insn->target);
 726
 727         /* perform store */
 728         LLVMBuildStore(fn->builder, target_in, addr);
 729 }
 730
 731 static LLVMValueRef bool_value(struct function *fn, LLVMValueRef value)
 732 {
 733         if (LLVMTypeOf(value) != LLVMInt1Type())
 734                 value = LLVMBuildIsNotNull(fn->builder, value, LLVMGetValueName(value));
 735
 736         return value;
 737 }
 738
 739 static void output_op_cbr(struct function *fn, struct instruction *br)
 740 {
 741         LLVMValueRef cond = bool_value(fn,
 742                         pseudo_to_value(fn, NULL, br->cond));
 743
 744         LLVMBuildCondBr(fn->builder, cond,
 745                         br->bb_true->priv,
 746                         br->bb_false->priv);
 747 }
 748
 749 static void output_op_br(struct function *fn, struct instruction *br)
 750 {
 751         LLVMBuildBr(fn->builder, br->bb_true->priv);
 752 }
 753
 754 static void output_op_sel(struct function *fn, struct instruction *insn)
 755 {
 756         LLVMValueRef target, src1, src2, src3;
 757         char name[MAX_PSEUDO_NAME];
 758
 759         src1 = bool_value(fn, pseudo_to_value(fn, NULL, insn->src1));
 760         src2 = get_operand(fn, insn->type, insn->src2);
 761         src3 = get_operand(fn, insn->type, insn->src3);
 762
 763         pseudo_name(insn->target, name);
 764         target = LLVMBuildSelect(fn->builder, src1, src2, src3, name);
 765
 766         insn->target->priv = adjust_type(fn, insn->type, target);
 767 }
 768
 769 static void output_op_switch(struct function *fn, struct instruction *insn)
 770 {
 771         LLVMValueRef sw_val, target;
 772         struct basic_block *def = NULL;
 773         struct multijmp *jmp;
 774         int n_jmp = 0;
 775
 776         FOR_EACH_PTR(insn->multijmp_list, jmp) {
 777                 if (jmp->begin <= jmp->end) {
 778                         n_jmp += (jmp->end - jmp->begin) + 1;
 779                 } else                                  /* default case */
 780                         def = jmp->target;
 781         } END_FOR_EACH_PTR(jmp);
 782
 783         sw_val = get_ioperand(fn, insn->type, insn->cond);
 784         target = LLVMBuildSwitch(fn->builder, sw_val,
 785                                  def ? def->priv : NULL, n_jmp);
 786
 787         FOR_EACH_PTR(insn->multijmp_list, jmp) {
 788                 long long val;
 789
 790                 for (val = jmp->begin; val <= jmp->end; val++) {
 791                         LLVMValueRef Val = val_to_value(val, insn->type);
 792                         LLVMAddCase(target, Val, jmp->target->priv);
 793                 }
 794         } END_FOR_EACH_PTR(jmp);
 795 }
 796
 797 static void output_op_call(struct function *fn, struct instruction *insn)
 798 {
 799         LLVMValueRef target, func;
 800         struct symbol *ctype;
 801         int n_arg = 0, i;
 802         struct pseudo *arg;
 803         LLVMValueRef *args;
 804         char name[64];
 805
 806         n_arg = pseudo_list_size(insn->arguments);
 807         args = calloc(n_arg, sizeof(LLVMValueRef));
 808
 809         PREPARE_PTR_LIST(insn->fntypes, ctype);
 810         if (insn->func->type == PSEUDO_REG || insn->func->type == PSEUDO_PHI)
 811                 func = get_operand(fn, ctype, insn->func);
 812         else
 813                 func = pseudo_to_value(fn, ctype, insn->func);
 814         i = 0;
 815         FOR_EACH_PTR(insn->arguments, arg) {
 816                 NEXT_PTR_LIST(ctype);
 817                 args[i++] = pseudo_to_rvalue(fn, ctype, arg);
 818         } END_FOR_EACH_PTR(arg);
 819         FINISH_PTR_LIST(ctype);
 820
 821         pseudo_name(insn->target, name);
 822         target = LLVMBuildCall(fn->builder, func, args, n_arg, name);
 823
 824         insn->target->priv = target;
 825 }
 826
 827 static void output_op_phisrc(struct function *fn, struct instruction *insn)
 828 {
 829         LLVMValueRef v;
 830         struct instruction *phi;
 831
 832         assert(insn->target->priv == NULL);
 833
 834         /* target = src */
 835         v = get_operand(fn, insn->type, insn->phi_src);
 836
 837         FOR_EACH_PTR(insn->phi_users, phi) {
 838                 LLVMValueRef load, ptr;
 839
 840                 assert(phi->opcode == OP_PHI);
 841                 /* phi must be load from alloca */
 842                 load = phi->target->priv;
 843                 assert(LLVMGetInstructionOpcode(load) == LLVMLoad);
 844                 ptr = LLVMGetOperand(load, 0);
 845                 /* store v to alloca */
 846                 LLVMBuildStore(fn->builder, v, ptr);
 847         } END_FOR_EACH_PTR(phi);
 848 }
 849
 850 static void output_op_phi(struct function *fn, struct instruction *insn)
 851 {
 852         LLVMValueRef load = insn->target->priv;
 853
 854         /* forward load */
 855         assert(LLVMGetInstructionOpcode(load) == LLVMLoad);
 856         /* forward load has no parent block */
 857         assert(!LLVMGetInstructionParent(load));
 858         /* finalize load in current block  */
 859         LLVMInsertIntoBuilder(fn->builder, load);
 860 }
 861
 862 static void output_op_ptrcast(struct function *fn, struct instruction *insn)
 863 {
 864         LLVMValueRef src, target;
 865         LLVMTypeRef dtype;
 866         struct symbol *otype = insn->orig_type;
 867         LLVMOpcode op;
 868         char target_name[64];
 869
 870         src = get_operand(fn, otype, insn->src);
 871         pseudo_name(insn->target, target_name);
 872
 873         dtype = symbol_type(insn->type);
 874         switch (insn->opcode) {
 875         case OP_UTPTR:
 876         case OP_SEXT:                   // FIXME
 877                 assert(is_int_type(otype));
 878                 assert(is_ptr_type(insn->type));
 879                 op = LLVMIntToPtr;
 880                 break;
 881         case OP_PTRTU:
 882                 assert(is_ptr_type(otype));
 883                 assert(is_int_type(insn->type));
 884                 op = LLVMPtrToInt;
 885                 break;
 886         case OP_PTRCAST:
 887         case OP_ZEXT:                   // FIXME
 888                 assert(is_ptr_type(otype));
 889                 assert(is_ptr_type(insn->type));
 890                 op = LLVMBitCast;
 891                 break;
 892         default:
 893                 assert(0);
 894         }
 895
 896         target = LLVMBuildCast(fn->builder, op, src, dtype, target_name);
 897         insn->target->priv = target;
 898 }
 899
 900 static void output_op_cast(struct function *fn, struct instruction *insn, LLVMOpcode op)
 901 {
 902         LLVMValueRef src, target;
 903         LLVMTypeRef dtype;
 904         struct symbol *otype = insn->orig_type;
 905         char target_name[64];
 906
 907         if (is_ptr_type(insn->type))    // cast to void* is OP_CAST ...
 908                 return output_op_ptrcast(fn, insn);
 909
 910         assert(is_int_type(insn->type));
 911
 912         src = get_operand(fn, otype, insn->src);
 913         pseudo_name(insn->target, target_name);
 914
 915         dtype = symbol_type(insn->type);
 916         if (is_ptr_type(otype)) {
 917                 op = LLVMPtrToInt;
 918         } else if (is_float_type(otype)) {
 919                 assert(op == LLVMFPToUI || op == LLVMFPToSI);
 920         } else if (is_int_type(otype)) {
 921                 unsigned int width = otype->bit_size;
 922                 if (insn->size < width)
 923                         op = LLVMTrunc;
 924                 else if (insn->size == width)
 925                         op = LLVMBitCast;
 926         } else {
 927                 assert(0);
 928         }
 929
 930         target = LLVMBuildCast(fn->builder, op, src, dtype, target_name);
 931         insn->target->priv = target;
 932 }
 933
 934 static void output_op_fpcast(struct function *fn, struct instruction *insn)
 935 {
 936         LLVMTypeRef dtype = symbol_type(insn->type);
 937         LLVMValueRef src, target;
 938         struct symbol *otype = insn->orig_type;
 939         char name[64];
 940
 941         assert(is_float_type(insn->type));
 942
 943         pseudo_name(insn->target, name);
 944         src = get_operand(fn, otype, insn->src);
 945         switch (insn->opcode) {
 946         case OP_FCVTF:
 947                 target = LLVMBuildFPCast(fn->builder, src, dtype, name);
 948                 break;
 949         case OP_SCVTF:
 950                 target = LLVMBuildSIToFP(fn->builder, src, dtype, name);
 951                 break;
 952         case OP_UCVTF:
 953                 target = LLVMBuildUIToFP(fn->builder, src, dtype, name);
 954                 break;
 955         default:
 956                 assert(0);
 957         }
 958         insn->target->priv = target;
 959 }
 960
 961 static void output_op_setval(struct function *fn, struct instruction *insn)
 962 {
 963         struct expression *val = insn->val;
 964         LLVMValueRef target;
 965
 966         switch (val->type) {
 967         case EXPR_LABEL:
 968                 target = LLVMBlockAddress(fn->fn, val->symbol->bb_target->priv);
 969                 break;
 970         default:
 971                 assert(0);
 972         }
 973
 974         insn->target->priv = target;
 975 }
 976
 977 static void output_op_setfval(struct function *fn, struct instruction *insn)
 978 {
 979         LLVMTypeRef dtype = symbol_type(insn->type);
 980         LLVMValueRef target;
 981
 982         target = LLVMConstReal(dtype, insn->fvalue);
 983         insn->target->priv = target;
 984 }
 985
 986 static void output_insn(struct function *fn, struct instruction *insn)
 987 {
 988         switch (insn->opcode) {
 989         case OP_RET:
 990                 output_op_ret(fn, insn);
 991                 break;
 992         case OP_BR:
 993                 output_op_br(fn, insn);
 994                 break;
 995         case OP_CBR:
 996                 output_op_cbr(fn, insn);
 997                 break;
 998         case OP_SYMADDR:
 999                 assert(0);
1000                 break;
1001         case OP_SETVAL:
1002                 output_op_setval(fn, insn);
1003                 break;
1004         case OP_SETFVAL:
1005                 output_op_setfval(fn, insn);
1006                 break;
1007         case OP_SWITCH:
1008                 output_op_switch(fn, insn);
1009                 break;
1010         case OP_COMPUTEDGOTO:
1011                 assert(0);
1012                 break;
1013         case OP_PHISOURCE:
1014                 output_op_phisrc(fn, insn);
1015                 break;
1016         case OP_PHI:
1017                 output_op_phi(fn, insn);
1018                 break;
1019         case OP_LOAD:
1020                 output_op_load(fn, insn);
1021                 break;
1022         case OP_STORE:
1023                 output_op_store(fn, insn);
1024                 break;
1025         case OP_INLINED_CALL:
1026                 break;
1027         case OP_CALL:
1028                 output_op_call(fn, insn);
1029                 break;
1030         case OP_ZEXT:
1031                 output_op_cast(fn, insn, LLVMZExt);
1032                 break;
1033         case OP_SEXT:
1034                 output_op_cast(fn, insn, LLVMSExt);
1035                 break;
1036         case OP_TRUNC:
1037                 output_op_cast(fn, insn, LLVMTrunc);
1038                 break;
1039         case OP_FCVTU:
1040                 output_op_cast(fn, insn, LLVMFPToUI);
1041                 break;
1042         case OP_FCVTS:
1043                 output_op_cast(fn, insn, LLVMFPToSI);
1044                 break;
1045         case OP_UCVTF: case OP_SCVTF:
1046         case OP_FCVTF:
1047                 output_op_fpcast(fn, insn);
1048                 break;
1049         case OP_UTPTR:
1050         case OP_PTRTU:
1051         case OP_PTRCAST:
1052                 output_op_ptrcast(fn, insn);
1053                 break;
1054         case OP_BINARY ... OP_BINARY_END:
1055                 output_op_binary(fn, insn);
1056                 break;
1057         case OP_FPCMP ... OP_BINCMP_END:
1058                 output_op_compare(fn, insn);
1059                 break;
1060         case OP_SEL:
1061                 output_op_sel(fn, insn);
1062                 break;
1063         case OP_SLICE:
1064                 assert(0);
1065                 break;
1066         case OP_NOT: {
1067                 LLVMValueRef src, target;
1068                 char target_name[64];
1069
1070                 src = pseudo_to_value(fn, insn->type, insn->src);
1071
1072                 pseudo_name(insn->target, target_name);
1073
1074                 target = LLVMBuildNot(fn->builder, src, target_name);
1075
1076                 insn->target->priv = target;
1077                 break;
1078         }
1079         case OP_FNEG:
1080         case OP_NEG: {
1081                 LLVMValueRef src, target;
1082                 char target_name[64];
1083
1084                 src = pseudo_to_value(fn, insn->type, insn->src);
1085
1086                 pseudo_name(insn->target, target_name);
1087
1088                 if (insn->opcode == OP_FNEG)
1089                         target = LLVMBuildFNeg(fn->builder, src, target_name);
1090                 else
1091                         target = LLVMBuildNeg(fn->builder, src, target_name);
1092
1093                 insn->target->priv = target;
1094                 break;
1095         }
1096         case OP_CONTEXT:
1097                 assert(0);
1098                 break;
1099         case OP_RANGE:
1100                 assert(0);
1101                 break;
1102         case OP_NOP:
1103                 assert(0);
1104                 break;
1105         case OP_DEATHNOTE:
1106                 break;
1107         case OP_ASM:
1108                 assert(0);
1109                 break;
1110         case OP_COPY:
1111                 assert(0);
1112                 break;
1113         default:
1114                 break;
1115         }
1116 }
1117
1118 static void output_bb(struct function *fn, struct basic_block *bb)
1119 {
1120         struct instruction *insn;
1121
1122         FOR_EACH_PTR(bb->insns, insn) {
1123                 if (!insn->bb)
1124                         continue;
1125
1126                 output_insn(fn, insn);
1127         }
1128         END_FOR_EACH_PTR(insn);
1129 }
1130
1131 #define MAX_ARGS        64
1132
1133 static void output_fn(LLVMModuleRef module, struct entrypoint *ep)
1134 {
1135         struct symbol *sym = ep->name;
1136         struct symbol *base_type = sym->ctype.base_type;
1137         struct function function = { .module = module };
1138         struct basic_block *bb;
1139         int nr_args = 0;
1140         int i;
1141
1142         function.fn = get_sym_value(module, sym);
1143         LLVMSetFunctionCallConv(function.fn, LLVMCCallConv);
1144         LLVMSetLinkage(function.fn, function_linkage(sym));
1145
1146         function.builder = LLVMCreateBuilder();
1147
1148         /* give a name to each argument */
1149         nr_args = symbol_list_size(base_type->arguments);
1150         for (i = 0; i < nr_args; i++) {
1151                 char name[MAX_PSEUDO_NAME];
1152                 LLVMValueRef arg;
1153
1154                 arg = LLVMGetParam(function.fn, i);
1155                 snprintf(name, sizeof(name), "ARG%d.", i+1);
1156                 LLVMSetValueName(arg, name);
1157         }
1158
1159         /* create the BBs */
1160         FOR_EACH_PTR(ep->bbs, bb) {
1161                 static int nr_bb;
1162                 LLVMBasicBlockRef bbr;
1163                 char bbname[32];
1164                 struct instruction *insn;
1165
1166                 sprintf(bbname, "L%d", nr_bb++);
1167                 bbr = LLVMAppendBasicBlock(function.fn, bbname);
1168
1169                 bb->priv = bbr;
1170
1171                 /* allocate alloca for each phi */
1172                 FOR_EACH_PTR(bb->insns, insn) {
1173                         LLVMBasicBlockRef entrybbr;
1174                         LLVMTypeRef phi_type;
1175                         LLVMValueRef ptr;
1176
1177                         if (!insn->bb || insn->opcode != OP_PHI)
1178                                 continue;
1179                         /* insert alloca into entry block */
1180                         entrybbr = LLVMGetEntryBasicBlock(function.fn);
1181                         LLVMPositionBuilderAtEnd(function.builder, entrybbr);
1182                         phi_type = insn_symbol_type(insn);
1183                         ptr = LLVMBuildAlloca(function.builder, phi_type, "");
1184                         /* emit forward load for phi */
1185                         LLVMClearInsertionPosition(function.builder);
1186                         insn->target->priv = LLVMBuildLoad(function.builder, ptr, "phi");
1187                 } END_FOR_EACH_PTR(insn);
1188         }
1189         END_FOR_EACH_PTR(bb);
1190
1191         FOR_EACH_PTR(ep->bbs, bb) {
1192                 LLVMPositionBuilderAtEnd(function.builder, bb->priv);
1193
1194                 output_bb(&function, bb);
1195         }
1196         END_FOR_EACH_PTR(bb);
1197 }
1198
1199 static LLVMValueRef output_data(LLVMModuleRef module, struct symbol *sym)
1200 {
1201         struct expression *initializer = sym->initializer;
1202         LLVMValueRef initial_value;
1203         LLVMValueRef data;
1204         const char *name;
1205
1206         if (initializer) {
1207                 switch (initializer->type) {
1208                 case EXPR_VALUE:
1209                         initial_value = LLVMConstInt(symbol_type(sym), initializer->value, 1);
1210                         break;
1211                 case EXPR_FVALUE:
1212                         initial_value = LLVMConstReal(symbol_type(sym), initializer->fvalue);
1213                         break;
1214                 case EXPR_SYMBOL: {
1215                         struct symbol *sym = initializer->symbol;
1216
1217                         initial_value = LLVMGetNamedGlobal(module, show_ident(sym->ident));
1218                         if (!initial_value)
1219                                 initial_value = output_data(module, sym);
1220                         break;
1221                 }
1222                 case EXPR_STRING: {
1223                         const char *s = initializer->string->data;
1224
1225                         initial_value = LLVMConstString(strdup(s), strlen(s) + 1, true);
1226                         break;
1227                 }
1228                 default:
1229                         warning(initializer->pos, "can't initialize type: %s", show_typename(sym));
1230                         initial_value = NULL;
1231                         break;
1232                 }
1233         } else {
1234                 LLVMTypeRef type = symbol_type(sym);
1235
1236                 initial_value = LLVMConstNull(type);
1237         }
1238
1239         if (!initial_value)
1240                 return NULL;
1241
1242         name = sym->ident ? show_ident(sym->ident) : "" ;
1243
1244         data = LLVMAddGlobal(module, LLVMTypeOf(initial_value), name);
1245
1246         LLVMSetLinkage(data, data_linkage(sym));
1247         if (sym->ctype.modifiers & MOD_CONST)
1248                 LLVMSetGlobalConstant(data, 1);
1249         if (sym->ctype.modifiers & MOD_TLS)
1250                 LLVMSetThreadLocal(data, 1);
1251         if (sym->ctype.alignment)
1252                 LLVMSetAlignment(data, sym->ctype.alignment);
1253
1254         if (!(sym->ctype.modifiers & MOD_EXTERN))
1255                 LLVMSetInitializer(data, initial_value);
1256
1257         return data;
1258 }
1259
1260 static int is_prototype(struct symbol *sym)
1261 {
1262         if (sym->type == SYM_NODE)
1263                 sym = sym->ctype.base_type;
1264         return sym && sym->type == SYM_FN && !sym->stmt;
1265 }
1266
1267 static int compile(LLVMModuleRef module, struct symbol_list *list)
1268 {
1269         struct symbol *sym;
1270
1271         FOR_EACH_PTR(list, sym) {
1272                 struct entrypoint *ep;
1273                 expand_symbol(sym);
1274
1275                 if (is_prototype(sym)) {
1276                         // this will do the LLVMAddFunction() we want
1277                         get_sym_value(module, sym);
1278                         continue;
1279                 }
1280
1281                 ep = linearize_symbol(sym);
1282                 if (ep)
1283                         output_fn(module, ep);
1284                 else
1285                         output_data(module, sym);
1286         }
1287         END_FOR_EACH_PTR(sym);
1288
1289         return 0;
1290 }
1291
1292 #ifndef LLVM_DEFAULT_TARGET_TRIPLE
1293 #define LLVM_DEFAULT_TARGET_TRIPLE LLVM_HOSTTRIPLE
1294 #endif
1295
1296 #define X86_LINUX_LAYOUT \
1297         "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-" \
1298         "i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-" \
1299         "a0:0:64-f80:32:32-n8:16:32-S128"
1300
1301 #define X86_64_LINUX_LAYOUT \
1302         "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-" \
1303         "i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-" \
1304         "a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128"
1305
1306 static void set_target(LLVMModuleRef module)
1307 {
1308         char target[] = LLVM_DEFAULT_TARGET_TRIPLE;
1309         const char *arch, *vendor, *os, *env, *layout = NULL;
1310         char triple[256];
1311
1312         arch = strtok(target, "-");
1313         vendor = strtok(NULL, "-");
1314         os = strtok(NULL, "-");
1315         env = strtok(NULL, "-");
1316
1317         if (!os)
1318                 return;
1319         if (!env)
1320                 env = "unknown";
1321
1322         if (!strcmp(arch, "x86_64") && !strcmp(os, "linux")) {
1323                 if (arch_m64) {
1324                         layout = X86_64_LINUX_LAYOUT;
1325                 } else {
1326                         arch = "i386";
1327                         layout = X86_LINUX_LAYOUT;
1328                 }
1329         }
1330
1331         /* unsupported target */
1332         if (!layout)
1333                 return;
1334
1335         snprintf(triple, sizeof(triple), "%s-%s-%s-%s", arch, vendor, os, env);
1336         LLVMSetTarget(module, triple);
1337         LLVMSetDataLayout(module, layout);
1338 }
1339
1340 int main(int argc, char **argv)
1341 {
1342         struct string_list *filelist = NULL;
1343         struct symbol_list *symlist;
1344         LLVMModuleRef module;
1345         char *file;
1346
1347         symlist = sparse_initialize(argc, argv, &filelist);
1348
1349         module = LLVMModuleCreateWithName("sparse");
1350         set_target(module);
1351
1352         compile(module, symlist);
1353
1354         /* need ->phi_users */
1355         dbg_dead = 1;
1356         FOR_EACH_PTR(filelist, file) {
1357                 symlist = sparse(file);
1358                 if (die_if_error)
1359                         return 1;
1360                 compile(module, symlist);
1361         } END_FOR_EACH_PTR(file);
1362
1363         LLVMVerifyModule(module, LLVMPrintMessageAction, NULL);
1364
1365         LLVMWriteBitcodeToFD(module, STDOUT_FILENO, 0, 0);
1366
1367         LLVMDisposeModule(module);
1368
1369         report_stats();
1370         return 0;
1371 }