1 //===-- Type.cpp - Implement the Type class -------------------------------===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is distributed under the University of Illinois Open Source 6 // License. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 // 10 // This file implements the Type class for the VMCore library. 11 // 12 //===----------------------------------------------------------------------===// 13 14 #include "LLVMContextImpl.h" 15 #include "llvm/Module.h" 16 #include <algorithm> 17 #include <cstdarg> 18 #include "llvm/ADT/SmallString.h" 19 using namespace llvm; 20 21 //===----------------------------------------------------------------------===// 22 // Type Class Implementation 23 //===----------------------------------------------------------------------===// 24 25 Type *Type::getPrimitiveType(LLVMContext &C, TypeID IDNumber) { 26 switch (IDNumber) { 27 case VoidTyID : return getVoidTy(C); 28 case HalfTyID : return getHalfTy(C); 29 case FloatTyID : return getFloatTy(C); 30 case DoubleTyID : return getDoubleTy(C); 31 case X86_FP80TyID : return getX86_FP80Ty(C); 32 case FP128TyID : return getFP128Ty(C); 33 case PPC_FP128TyID : return getPPC_FP128Ty(C); 34 case LabelTyID : return getLabelTy(C); 35 case MetadataTyID : return getMetadataTy(C); 36 case X86_MMXTyID : return getX86_MMXTy(C); 37 default: 38 return 0; 39 } 40 } 41 42 /// getScalarType - If this is a vector type, return the element type, 43 /// otherwise return this. 44 Type *Type::getScalarType() { 45 if (VectorType *VTy = dyn_cast<VectorType>(this)) 46 return VTy->getElementType(); 47 return this; 48 } 49 50 /// isIntegerTy - Return true if this is an IntegerType of the specified width. 51 bool Type::isIntegerTy(unsigned Bitwidth) const { 52 return isIntegerTy() && cast<IntegerType>(this)->getBitWidth() == Bitwidth; 53 } 54 55 /// isIntOrIntVectorTy - Return true if this is an integer type or a vector of 56 /// integer types. 57 /// 58 bool Type::isIntOrIntVectorTy() const { 59 if (isIntegerTy()) 60 return true; 61 if (getTypeID() != Type::VectorTyID) return false; 62 63 return cast<VectorType>(this)->getElementType()->isIntegerTy(); 64 } 65 66 /// isFPOrFPVectorTy - Return true if this is a FP type or a vector of FP types. 67 /// 68 bool Type::isFPOrFPVectorTy() const { 69 if (getTypeID() == Type::HalfTyID || getTypeID() == Type::FloatTyID || 70 getTypeID() == Type::DoubleTyID || 71 getTypeID() == Type::FP128TyID || getTypeID() == Type::X86_FP80TyID || 72 getTypeID() == Type::PPC_FP128TyID) 73 return true; 74 if (getTypeID() != Type::VectorTyID) return false; 75 76 return cast<VectorType>(this)->getElementType()->isFloatingPointTy(); 77 } 78 79 // canLosslesslyBitCastTo - Return true if this type can be converted to 80 // 'Ty' without any reinterpretation of bits. For example, i8* to i32*. 81 // 82 bool Type::canLosslesslyBitCastTo(Type *Ty) const { 83 // Identity cast means no change so return true 84 if (this == Ty) 85 return true; 86 87 // They are not convertible unless they are at least first class types 88 if (!this->isFirstClassType() || !Ty->isFirstClassType()) 89 return false; 90 91 // Vector -> Vector conversions are always lossless if the two vector types 92 // have the same size, otherwise not. Also, 64-bit vector types can be 93 // converted to x86mmx. 94 if (const VectorType *thisPTy = dyn_cast<VectorType>(this)) { 95 if (const VectorType *thatPTy = dyn_cast<VectorType>(Ty)) 96 return thisPTy->getBitWidth() == thatPTy->getBitWidth(); 97 if (Ty->getTypeID() == Type::X86_MMXTyID && 98 thisPTy->getBitWidth() == 64) 99 return true; 100 } 101 102 if (this->getTypeID() == Type::X86_MMXTyID) 103 if (const VectorType *thatPTy = dyn_cast<VectorType>(Ty)) 104 if (thatPTy->getBitWidth() == 64) 105 return true; 106 107 // At this point we have only various mismatches of the first class types 108 // remaining and ptr->ptr. Just select the lossless conversions. Everything 109 // else is not lossless. 110 if (this->isPointerTy()) 111 return Ty->isPointerTy(); 112 return false; // Other types have no identity values 113 } 114 115 bool Type::isEmptyTy() const { 116 const ArrayType *ATy = dyn_cast<ArrayType>(this); 117 if (ATy) { 118 unsigned NumElements = ATy->getNumElements(); 119 return NumElements == 0 || ATy->getElementType()->isEmptyTy(); 120 } 121 122 const StructType *STy = dyn_cast<StructType>(this); 123 if (STy) { 124 unsigned NumElements = STy->getNumElements(); 125 for (unsigned i = 0; i < NumElements; ++i) 126 if (!STy->getElementType(i)->isEmptyTy()) 127 return false; 128 return true; 129 } 130 131 return false; 132 } 133 134 unsigned Type::getPrimitiveSizeInBits() const { 135 switch (getTypeID()) { 136 case Type::HalfTyID: return 16; 137 case Type::FloatTyID: return 32; 138 case Type::DoubleTyID: return 64; 139 case Type::X86_FP80TyID: return 80; 140 case Type::FP128TyID: return 128; 141 case Type::PPC_FP128TyID: return 128; 142 case Type::X86_MMXTyID: return 64; 143 case Type::IntegerTyID: return cast<IntegerType>(this)->getBitWidth(); 144 case Type::VectorTyID: return cast<VectorType>(this)->getBitWidth(); 145 default: return 0; 146 } 147 } 148 149 /// getScalarSizeInBits - If this is a vector type, return the 150 /// getPrimitiveSizeInBits value for the element type. Otherwise return the 151 /// getPrimitiveSizeInBits value for this type. 152 unsigned Type::getScalarSizeInBits() { 153 return getScalarType()->getPrimitiveSizeInBits(); 154 } 155 156 /// getFPMantissaWidth - Return the width of the mantissa of this type. This 157 /// is only valid on floating point types. If the FP type does not 158 /// have a stable mantissa (e.g. ppc long double), this method returns -1. 159 int Type::getFPMantissaWidth() const { 160 if (const VectorType *VTy = dyn_cast<VectorType>(this)) 161 return VTy->getElementType()->getFPMantissaWidth(); 162 assert(isFloatingPointTy() && "Not a floating point type!"); 163 if (getTypeID() == HalfTyID) return 11; 164 if (getTypeID() == FloatTyID) return 24; 165 if (getTypeID() == DoubleTyID) return 53; 166 if (getTypeID() == X86_FP80TyID) return 64; 167 if (getTypeID() == FP128TyID) return 113; 168 assert(getTypeID() == PPC_FP128TyID && "unknown fp type"); 169 return -1; 170 } 171 172 /// isSizedDerivedType - Derived types like structures and arrays are sized 173 /// iff all of the members of the type are sized as well. Since asking for 174 /// their size is relatively uncommon, move this operation out of line. 175 bool Type::isSizedDerivedType() const { 176 if (this->isIntegerTy()) 177 return true; 178 179 if (const ArrayType *ATy = dyn_cast<ArrayType>(this)) 180 return ATy->getElementType()->isSized(); 181 182 if (const VectorType *VTy = dyn_cast<VectorType>(this)) 183 return VTy->getElementType()->isSized(); 184 185 if (!this->isStructTy()) 186 return false; 187 188 return cast<StructType>(this)->isSized(); 189 } 190 191 //===----------------------------------------------------------------------===// 192 // Subclass Helper Methods 193 //===----------------------------------------------------------------------===// 194 195 unsigned Type::getIntegerBitWidth() const { 196 return cast<IntegerType>(this)->getBitWidth(); 197 } 198 199 bool Type::isFunctionVarArg() const { 200 return cast<FunctionType>(this)->isVarArg(); 201 } 202 203 Type *Type::getFunctionParamType(unsigned i) const { 204 return cast<FunctionType>(this)->getParamType(i); 205 } 206 207 unsigned Type::getFunctionNumParams() const { 208 return cast<FunctionType>(this)->getNumParams(); 209 } 210 211 StringRef Type::getStructName() const { 212 return cast<StructType>(this)->getName(); 213 } 214 215 unsigned Type::getStructNumElements() const { 216 return cast<StructType>(this)->getNumElements(); 217 } 218 219 Type *Type::getStructElementType(unsigned N) const { 220 return cast<StructType>(this)->getElementType(N); 221 } 222 223 224 225 Type *Type::getSequentialElementType() const { 226 return cast<SequentialType>(this)->getElementType(); 227 } 228 229 uint64_t Type::getArrayNumElements() const { 230 return cast<ArrayType>(this)->getNumElements(); 231 } 232 233 unsigned Type::getVectorNumElements() const { 234 return cast<VectorType>(this)->getNumElements(); 235 } 236 237 unsigned Type::getPointerAddressSpace() const { 238 return cast<PointerType>(this)->getAddressSpace(); 239 } 240 241 242 243 244 //===----------------------------------------------------------------------===// 245 // Primitive 'Type' data 246 //===----------------------------------------------------------------------===// 247 248 Type *Type::getVoidTy(LLVMContext &C) { return &C.pImpl->VoidTy; } 249 Type *Type::getLabelTy(LLVMContext &C) { return &C.pImpl->LabelTy; } 250 Type *Type::getHalfTy(LLVMContext &C) { return &C.pImpl->HalfTy; } 251 Type *Type::getFloatTy(LLVMContext &C) { return &C.pImpl->FloatTy; } 252 Type *Type::getDoubleTy(LLVMContext &C) { return &C.pImpl->DoubleTy; } 253 Type *Type::getMetadataTy(LLVMContext &C) { return &C.pImpl->MetadataTy; } 254 Type *Type::getX86_FP80Ty(LLVMContext &C) { return &C.pImpl->X86_FP80Ty; } 255 Type *Type::getFP128Ty(LLVMContext &C) { return &C.pImpl->FP128Ty; } 256 Type *Type::getPPC_FP128Ty(LLVMContext &C) { return &C.pImpl->PPC_FP128Ty; } 257 Type *Type::getX86_MMXTy(LLVMContext &C) { return &C.pImpl->X86_MMXTy; } 258 259 IntegerType *Type::getInt1Ty(LLVMContext &C) { return &C.pImpl->Int1Ty; } 260 IntegerType *Type::getInt8Ty(LLVMContext &C) { return &C.pImpl->Int8Ty; } 261 IntegerType *Type::getInt16Ty(LLVMContext &C) { return &C.pImpl->Int16Ty; } 262 IntegerType *Type::getInt32Ty(LLVMContext &C) { return &C.pImpl->Int32Ty; } 263 IntegerType *Type::getInt64Ty(LLVMContext &C) { return &C.pImpl->Int64Ty; } 264 265 IntegerType *Type::getIntNTy(LLVMContext &C, unsigned N) { 266 return IntegerType::get(C, N); 267 } 268 269 PointerType *Type::getHalfPtrTy(LLVMContext &C, unsigned AS) { 270 return getHalfTy(C)->getPointerTo(AS); 271 } 272 273 PointerType *Type::getFloatPtrTy(LLVMContext &C, unsigned AS) { 274 return getFloatTy(C)->getPointerTo(AS); 275 } 276 277 PointerType *Type::getDoublePtrTy(LLVMContext &C, unsigned AS) { 278 return getDoubleTy(C)->getPointerTo(AS); 279 } 280 281 PointerType *Type::getX86_FP80PtrTy(LLVMContext &C, unsigned AS) { 282 return getX86_FP80Ty(C)->getPointerTo(AS); 283 } 284 285 PointerType *Type::getFP128PtrTy(LLVMContext &C, unsigned AS) { 286 return getFP128Ty(C)->getPointerTo(AS); 287 } 288 289 PointerType *Type::getPPC_FP128PtrTy(LLVMContext &C, unsigned AS) { 290 return getPPC_FP128Ty(C)->getPointerTo(AS); 291 } 292 293 PointerType *Type::getX86_MMXPtrTy(LLVMContext &C, unsigned AS) { 294 return getX86_MMXTy(C)->getPointerTo(AS); 295 } 296 297 PointerType *Type::getIntNPtrTy(LLVMContext &C, unsigned N, unsigned AS) { 298 return getIntNTy(C, N)->getPointerTo(AS); 299 } 300 301 PointerType *Type::getInt1PtrTy(LLVMContext &C, unsigned AS) { 302 return getInt1Ty(C)->getPointerTo(AS); 303 } 304 305 PointerType *Type::getInt8PtrTy(LLVMContext &C, unsigned AS) { 306 return getInt8Ty(C)->getPointerTo(AS); 307 } 308 309 PointerType *Type::getInt16PtrTy(LLVMContext &C, unsigned AS) { 310 return getInt16Ty(C)->getPointerTo(AS); 311 } 312 313 PointerType *Type::getInt32PtrTy(LLVMContext &C, unsigned AS) { 314 return getInt32Ty(C)->getPointerTo(AS); 315 } 316 317 PointerType *Type::getInt64PtrTy(LLVMContext &C, unsigned AS) { 318 return getInt64Ty(C)->getPointerTo(AS); 319 } 320 321 322 //===----------------------------------------------------------------------===// 323 // IntegerType Implementation 324 //===----------------------------------------------------------------------===// 325 326 IntegerType *IntegerType::get(LLVMContext &C, unsigned NumBits) { 327 assert(NumBits >= MIN_INT_BITS && "bitwidth too small"); 328 assert(NumBits <= MAX_INT_BITS && "bitwidth too large"); 329 330 // Check for the built-in integer types 331 switch (NumBits) { 332 case 1: return cast<IntegerType>(Type::getInt1Ty(C)); 333 case 8: return cast<IntegerType>(Type::getInt8Ty(C)); 334 case 16: return cast<IntegerType>(Type::getInt16Ty(C)); 335 case 32: return cast<IntegerType>(Type::getInt32Ty(C)); 336 case 64: return cast<IntegerType>(Type::getInt64Ty(C)); 337 default: 338 break; 339 } 340 341 IntegerType *&Entry = C.pImpl->IntegerTypes[NumBits]; 342 343 if (Entry == 0) 344 Entry = new (C.pImpl->TypeAllocator) IntegerType(C, NumBits); 345 346 return Entry; 347 } 348 349 bool IntegerType::isPowerOf2ByteWidth() const { 350 unsigned BitWidth = getBitWidth(); 351 return (BitWidth > 7) && isPowerOf2_32(BitWidth); 352 } 353 354 APInt IntegerType::getMask() const { 355 return APInt::getAllOnesValue(getBitWidth()); 356 } 357 358 //===----------------------------------------------------------------------===// 359 // FunctionType Implementation 360 //===----------------------------------------------------------------------===// 361 362 FunctionType::FunctionType(Type *Result, ArrayRef<Type*> Params, 363 bool IsVarArgs) 364 : Type(Result->getContext(), FunctionTyID) { 365 Type **SubTys = reinterpret_cast<Type**>(this+1); 366 assert(isValidReturnType(Result) && "invalid return type for function"); 367 setSubclassData(IsVarArgs); 368 369 SubTys[0] = const_cast<Type*>(Result); 370 371 for (unsigned i = 0, e = Params.size(); i != e; ++i) { 372 assert(isValidArgumentType(Params[i]) && 373 "Not a valid type for function argument!"); 374 SubTys[i+1] = Params[i]; 375 } 376 377 ContainedTys = SubTys; 378 NumContainedTys = Params.size() + 1; // + 1 for result type 379 } 380 381 // FunctionType::get - The factory function for the FunctionType class. 382 FunctionType *FunctionType::get(Type *ReturnType, 383 ArrayRef<Type*> Params, bool isVarArg) { 384 LLVMContextImpl *pImpl = ReturnType->getContext().pImpl; 385 FunctionTypeKeyInfo::KeyTy Key(ReturnType, Params, isVarArg); 386 LLVMContextImpl::FunctionTypeMap::iterator I = 387 pImpl->FunctionTypes.find_as(Key); 388 FunctionType *FT; 389 390 if (I == pImpl->FunctionTypes.end()) { 391 FT = (FunctionType*) pImpl->TypeAllocator. 392 Allocate(sizeof(FunctionType) + sizeof(Type*) * (Params.size() + 1), 393 AlignOf<FunctionType>::Alignment); 394 new (FT) FunctionType(ReturnType, Params, isVarArg); 395 pImpl->FunctionTypes[FT] = true; 396 } else { 397 FT = I->first; 398 } 399 400 return FT; 401 } 402 403 404 FunctionType *FunctionType::get(Type *Result, bool isVarArg) { 405 return get(Result, ArrayRef<Type *>(), isVarArg); 406 } 407 408 409 /// isValidReturnType - Return true if the specified type is valid as a return 410 /// type. 411 bool FunctionType::isValidReturnType(Type *RetTy) { 412 return !RetTy->isFunctionTy() && !RetTy->isLabelTy() && 413 !RetTy->isMetadataTy(); 414 } 415 416 /// isValidArgumentType - Return true if the specified type is valid as an 417 /// argument type. 418 bool FunctionType::isValidArgumentType(Type *ArgTy) { 419 return ArgTy->isFirstClassType(); 420 } 421 422 //===----------------------------------------------------------------------===// 423 // StructType Implementation 424 //===----------------------------------------------------------------------===// 425 426 // Primitive Constructors. 427 428 StructType *StructType::get(LLVMContext &Context, ArrayRef<Type*> ETypes, 429 bool isPacked) { 430 LLVMContextImpl *pImpl = Context.pImpl; 431 AnonStructTypeKeyInfo::KeyTy Key(ETypes, isPacked); 432 LLVMContextImpl::StructTypeMap::iterator I = 433 pImpl->AnonStructTypes.find_as(Key); 434 StructType *ST; 435 436 if (I == pImpl->AnonStructTypes.end()) { 437 // Value not found. Create a new type! 438 ST = new (Context.pImpl->TypeAllocator) StructType(Context); 439 ST->setSubclassData(SCDB_IsLiteral); // Literal struct. 440 ST->setBody(ETypes, isPacked); 441 Context.pImpl->AnonStructTypes[ST] = true; 442 } else { 443 ST = I->first; 444 } 445 446 return ST; 447 } 448 449 void StructType::setBody(ArrayRef<Type*> Elements, bool isPacked) { 450 assert(isOpaque() && "Struct body already set!"); 451 452 setSubclassData(getSubclassData() | SCDB_HasBody); 453 if (isPacked) 454 setSubclassData(getSubclassData() | SCDB_Packed); 455 456 unsigned NumElements = Elements.size(); 457 Type **Elts = getContext().pImpl->TypeAllocator.Allocate<Type*>(NumElements); 458 memcpy(Elts, Elements.data(), sizeof(Elements[0]) * NumElements); 459 460 ContainedTys = Elts; 461 NumContainedTys = NumElements; 462 } 463 464 void StructType::setName(StringRef Name) { 465 if (Name == getName()) return; 466 467 StringMap<StructType *> &SymbolTable = getContext().pImpl->NamedStructTypes; 468 typedef StringMap<StructType *>::MapEntryTy EntryTy; 469 470 // If this struct already had a name, remove its symbol table entry. Don't 471 // delete the data yet because it may be part of the new name. 472 if (SymbolTableEntry) 473 SymbolTable.remove((EntryTy *)SymbolTableEntry); 474 475 // If this is just removing the name, we're done. 476 if (Name.empty()) { 477 if (SymbolTableEntry) { 478 // Delete the old string data. 479 ((EntryTy *)SymbolTableEntry)->Destroy(SymbolTable.getAllocator()); 480 SymbolTableEntry = 0; 481 } 482 return; 483 } 484 485 // Look up the entry for the name. 486 EntryTy *Entry = &getContext().pImpl->NamedStructTypes.GetOrCreateValue(Name); 487 488 // While we have a name collision, try a random rename. 489 if (Entry->getValue()) { 490 SmallString<64> TempStr(Name); 491 TempStr.push_back('.'); 492 raw_svector_ostream TmpStream(TempStr); 493 unsigned NameSize = Name.size(); 494 495 do { 496 TempStr.resize(NameSize + 1); 497 TmpStream.resync(); 498 TmpStream << getContext().pImpl->NamedStructTypesUniqueID++; 499 500 Entry = &getContext().pImpl-> 501 NamedStructTypes.GetOrCreateValue(TmpStream.str()); 502 } while (Entry->getValue()); 503 } 504 505 // Okay, we found an entry that isn't used. It's us! 506 Entry->setValue(this); 507 508 // Delete the old string data. 509 if (SymbolTableEntry) 510 ((EntryTy *)SymbolTableEntry)->Destroy(SymbolTable.getAllocator()); 511 SymbolTableEntry = Entry; 512 } 513 514 //===----------------------------------------------------------------------===// 515 // StructType Helper functions. 516 517 StructType *StructType::create(LLVMContext &Context, StringRef Name) { 518 StructType *ST = new (Context.pImpl->TypeAllocator) StructType(Context); 519 if (!Name.empty()) 520 ST->setName(Name); 521 return ST; 522 } 523 524 StructType *StructType::get(LLVMContext &Context, bool isPacked) { 525 return get(Context, llvm::ArrayRef<Type*>(), isPacked); 526 } 527 528 StructType *StructType::get(Type *type, ...) { 529 assert(type != 0 && "Cannot create a struct type with no elements with this"); 530 LLVMContext &Ctx = type->getContext(); 531 va_list ap; 532 SmallVector<llvm::Type*, 8> StructFields; 533 va_start(ap, type); 534 while (type) { 535 StructFields.push_back(type); 536 type = va_arg(ap, llvm::Type*); 537 } 538 return llvm::StructType::get(Ctx, StructFields); 539 } 540 541 StructType *StructType::create(LLVMContext &Context, ArrayRef<Type*> Elements, 542 StringRef Name, bool isPacked) { 543 StructType *ST = create(Context, Name); 544 ST->setBody(Elements, isPacked); 545 return ST; 546 } 547 548 StructType *StructType::create(LLVMContext &Context, ArrayRef<Type*> Elements) { 549 return create(Context, Elements, StringRef()); 550 } 551 552 StructType *StructType::create(LLVMContext &Context) { 553 return create(Context, StringRef()); 554 } 555 556 557 StructType *StructType::create(ArrayRef<Type*> Elements, StringRef Name, 558 bool isPacked) { 559 assert(!Elements.empty() && 560 "This method may not be invoked with an empty list"); 561 return create(Elements[0]->getContext(), Elements, Name, isPacked); 562 } 563 564 StructType *StructType::create(ArrayRef<Type*> Elements) { 565 assert(!Elements.empty() && 566 "This method may not be invoked with an empty list"); 567 return create(Elements[0]->getContext(), Elements, StringRef()); 568 } 569 570 StructType *StructType::create(StringRef Name, Type *type, ...) { 571 assert(type != 0 && "Cannot create a struct type with no elements with this"); 572 LLVMContext &Ctx = type->getContext(); 573 va_list ap; 574 SmallVector<llvm::Type*, 8> StructFields; 575 va_start(ap, type); 576 while (type) { 577 StructFields.push_back(type); 578 type = va_arg(ap, llvm::Type*); 579 } 580 return llvm::StructType::create(Ctx, StructFields, Name); 581 } 582 583 bool StructType::isSized() const { 584 if ((getSubclassData() & SCDB_IsSized) != 0) 585 return true; 586 if (isOpaque()) 587 return false; 588 589 // Okay, our struct is sized if all of the elements are, but if one of the 590 // elements is opaque, the struct isn't sized *yet*, but may become sized in 591 // the future, so just bail out without caching. 592 for (element_iterator I = element_begin(), E = element_end(); I != E; ++I) 593 if (!(*I)->isSized()) 594 return false; 595 596 // Here we cheat a bit and cast away const-ness. The goal is to memoize when 597 // we find a sized type, as types can only move from opaque to sized, not the 598 // other way. 599 const_cast<StructType*>(this)->setSubclassData( 600 getSubclassData() | SCDB_IsSized); 601 return true; 602 } 603 604 StringRef StructType::getName() const { 605 assert(!isLiteral() && "Literal structs never have names"); 606 if (SymbolTableEntry == 0) return StringRef(); 607 608 return ((StringMapEntry<StructType*> *)SymbolTableEntry)->getKey(); 609 } 610 611 void StructType::setBody(Type *type, ...) { 612 assert(type != 0 && "Cannot create a struct type with no elements with this"); 613 va_list ap; 614 SmallVector<llvm::Type*, 8> StructFields; 615 va_start(ap, type); 616 while (type) { 617 StructFields.push_back(type); 618 type = va_arg(ap, llvm::Type*); 619 } 620 setBody(StructFields); 621 } 622 623 bool StructType::isValidElementType(Type *ElemTy) { 624 return !ElemTy->isVoidTy() && !ElemTy->isLabelTy() && 625 !ElemTy->isMetadataTy() && !ElemTy->isFunctionTy(); 626 } 627 628 /// isLayoutIdentical - Return true if this is layout identical to the 629 /// specified struct. 630 bool StructType::isLayoutIdentical(StructType *Other) const { 631 if (this == Other) return true; 632 633 if (isPacked() != Other->isPacked() || 634 getNumElements() != Other->getNumElements()) 635 return false; 636 637 return std::equal(element_begin(), element_end(), Other->element_begin()); 638 } 639 640 641 /// getTypeByName - Return the type with the specified name, or null if there 642 /// is none by that name. 643 StructType *Module::getTypeByName(StringRef Name) const { 644 StringMap<StructType*>::iterator I = 645 getContext().pImpl->NamedStructTypes.find(Name); 646 if (I != getContext().pImpl->NamedStructTypes.end()) 647 return I->second; 648 return 0; 649 } 650 651 652 //===----------------------------------------------------------------------===// 653 // CompositeType Implementation 654 //===----------------------------------------------------------------------===// 655 656 Type *CompositeType::getTypeAtIndex(const Value *V) { 657 if (StructType *STy = dyn_cast<StructType>(this)) { 658 unsigned Idx = (unsigned)cast<ConstantInt>(V)->getZExtValue(); 659 assert(indexValid(Idx) && "Invalid structure index!"); 660 return STy->getElementType(Idx); 661 } 662 663 return cast<SequentialType>(this)->getElementType(); 664 } 665 Type *CompositeType::getTypeAtIndex(unsigned Idx) { 666 if (StructType *STy = dyn_cast<StructType>(this)) { 667 assert(indexValid(Idx) && "Invalid structure index!"); 668 return STy->getElementType(Idx); 669 } 670 671 return cast<SequentialType>(this)->getElementType(); 672 } 673 bool CompositeType::indexValid(const Value *V) const { 674 if (const StructType *STy = dyn_cast<StructType>(this)) { 675 // Structure indexes require 32-bit integer constants. 676 if (V->getType()->isIntegerTy(32)) 677 if (const ConstantInt *CU = dyn_cast<ConstantInt>(V)) 678 return CU->getZExtValue() < STy->getNumElements(); 679 return false; 680 } 681 682 // Sequential types can be indexed by any integer. 683 return V->getType()->isIntegerTy(); 684 } 685 686 bool CompositeType::indexValid(unsigned Idx) const { 687 if (const StructType *STy = dyn_cast<StructType>(this)) 688 return Idx < STy->getNumElements(); 689 // Sequential types can be indexed by any integer. 690 return true; 691 } 692 693 694 //===----------------------------------------------------------------------===// 695 // ArrayType Implementation 696 //===----------------------------------------------------------------------===// 697 698 ArrayType::ArrayType(Type *ElType, uint64_t NumEl) 699 : SequentialType(ArrayTyID, ElType) { 700 NumElements = NumEl; 701 } 702 703 704 ArrayType *ArrayType::get(Type *elementType, uint64_t NumElements) { 705 Type *ElementType = const_cast<Type*>(elementType); 706 assert(isValidElementType(ElementType) && "Invalid type for array element!"); 707 708 LLVMContextImpl *pImpl = ElementType->getContext().pImpl; 709 ArrayType *&Entry = 710 pImpl->ArrayTypes[std::make_pair(ElementType, NumElements)]; 711 712 if (Entry == 0) 713 Entry = new (pImpl->TypeAllocator) ArrayType(ElementType, NumElements); 714 return Entry; 715 } 716 717 bool ArrayType::isValidElementType(Type *ElemTy) { 718 return !ElemTy->isVoidTy() && !ElemTy->isLabelTy() && 719 !ElemTy->isMetadataTy() && !ElemTy->isFunctionTy(); 720 } 721 722 //===----------------------------------------------------------------------===// 723 // VectorType Implementation 724 //===----------------------------------------------------------------------===// 725 726 VectorType::VectorType(Type *ElType, unsigned NumEl) 727 : SequentialType(VectorTyID, ElType) { 728 NumElements = NumEl; 729 } 730 731 VectorType *VectorType::get(Type *elementType, unsigned NumElements) { 732 Type *ElementType = const_cast<Type*>(elementType); 733 assert(NumElements > 0 && "#Elements of a VectorType must be greater than 0"); 734 assert(isValidElementType(ElementType) && 735 "Elements of a VectorType must be a primitive type"); 736 737 LLVMContextImpl *pImpl = ElementType->getContext().pImpl; 738 VectorType *&Entry = ElementType->getContext().pImpl 739 ->VectorTypes[std::make_pair(ElementType, NumElements)]; 740 741 if (Entry == 0) 742 Entry = new (pImpl->TypeAllocator) VectorType(ElementType, NumElements); 743 return Entry; 744 } 745 746 bool VectorType::isValidElementType(Type *ElemTy) { 747 if (PointerType *PTy = dyn_cast<PointerType>(ElemTy)) 748 ElemTy = PTy->getElementType(); 749 return ElemTy->isIntegerTy() || ElemTy->isFloatingPointTy(); 750 } 751 752 //===----------------------------------------------------------------------===// 753 // PointerType Implementation 754 //===----------------------------------------------------------------------===// 755 756 PointerType *PointerType::get(Type *EltTy, unsigned AddressSpace) { 757 assert(EltTy && "Can't get a pointer to <null> type!"); 758 assert(isValidElementType(EltTy) && "Invalid type for pointer element!"); 759 760 LLVMContextImpl *CImpl = EltTy->getContext().pImpl; 761 762 // Since AddressSpace #0 is the common case, we special case it. 763 PointerType *&Entry = AddressSpace == 0 ? CImpl->PointerTypes[EltTy] 764 : CImpl->ASPointerTypes[std::make_pair(EltTy, AddressSpace)]; 765 766 if (Entry == 0) 767 Entry = new (CImpl->TypeAllocator) PointerType(EltTy, AddressSpace); 768 return Entry; 769 } 770 771 772 PointerType::PointerType(Type *E, unsigned AddrSpace) 773 : SequentialType(PointerTyID, E) { 774 #ifndef NDEBUG 775 const unsigned oldNCT = NumContainedTys; 776 #endif 777 setSubclassData(AddrSpace); 778 // Check for miscompile. PR11652. 779 assert(oldNCT == NumContainedTys && "bitfield written out of bounds?"); 780 } 781 782 PointerType *Type::getPointerTo(unsigned addrs) { 783 return PointerType::get(this, addrs); 784 } 785 786 bool PointerType::isValidElementType(Type *ElemTy) { 787 return !ElemTy->isVoidTy() && !ElemTy->isLabelTy() && 788 !ElemTy->isMetadataTy(); 789 } 790