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" 19using namespace llvm; 20 21//===----------------------------------------------------------------------===// 22// Type Class Implementation 23//===----------------------------------------------------------------------===// 24 25Type *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. 44Type *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. 51bool 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/// 58bool 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/// 68bool 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// 82bool 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 115bool 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 134unsigned 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. 152unsigned 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. 159int 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. 175bool 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 195unsigned Type::getIntegerBitWidth() const { 196 return cast<IntegerType>(this)->getBitWidth(); 197} 198 199bool Type::isFunctionVarArg() const { 200 return cast<FunctionType>(this)->isVarArg(); 201} 202 203Type *Type::getFunctionParamType(unsigned i) const { 204 return cast<FunctionType>(this)->getParamType(i); 205} 206 207unsigned Type::getFunctionNumParams() const { 208 return cast<FunctionType>(this)->getNumParams(); 209} 210 211StringRef Type::getStructName() const { 212 return cast<StructType>(this)->getName(); 213} 214 215unsigned Type::getStructNumElements() const { 216 return cast<StructType>(this)->getNumElements(); 217} 218 219Type *Type::getStructElementType(unsigned N) const { 220 return cast<StructType>(this)->getElementType(N); 221} 222 223Type *Type::getSequentialElementType() const { 224 return cast<SequentialType>(this)->getElementType(); 225} 226 227uint64_t Type::getArrayNumElements() const { 228 return cast<ArrayType>(this)->getNumElements(); 229} 230 231unsigned Type::getVectorNumElements() const { 232 return cast<VectorType>(this)->getNumElements(); 233} 234 235unsigned Type::getPointerAddressSpace() const { 236 return cast<PointerType>(this)->getAddressSpace(); 237} 238 239 240//===----------------------------------------------------------------------===// 241// Primitive 'Type' data 242//===----------------------------------------------------------------------===// 243 244Type *Type::getVoidTy(LLVMContext &C) { return &C.pImpl->VoidTy; } 245Type *Type::getLabelTy(LLVMContext &C) { return &C.pImpl->LabelTy; } 246Type *Type::getHalfTy(LLVMContext &C) { return &C.pImpl->HalfTy; } 247Type *Type::getFloatTy(LLVMContext &C) { return &C.pImpl->FloatTy; } 248Type *Type::getDoubleTy(LLVMContext &C) { return &C.pImpl->DoubleTy; } 249Type *Type::getMetadataTy(LLVMContext &C) { return &C.pImpl->MetadataTy; } 250Type *Type::getX86_FP80Ty(LLVMContext &C) { return &C.pImpl->X86_FP80Ty; } 251Type *Type::getFP128Ty(LLVMContext &C) { return &C.pImpl->FP128Ty; } 252Type *Type::getPPC_FP128Ty(LLVMContext &C) { return &C.pImpl->PPC_FP128Ty; } 253Type *Type::getX86_MMXTy(LLVMContext &C) { return &C.pImpl->X86_MMXTy; } 254 255IntegerType *Type::getInt1Ty(LLVMContext &C) { return &C.pImpl->Int1Ty; } 256IntegerType *Type::getInt8Ty(LLVMContext &C) { return &C.pImpl->Int8Ty; } 257IntegerType *Type::getInt16Ty(LLVMContext &C) { return &C.pImpl->Int16Ty; } 258IntegerType *Type::getInt32Ty(LLVMContext &C) { return &C.pImpl->Int32Ty; } 259IntegerType *Type::getInt64Ty(LLVMContext &C) { return &C.pImpl->Int64Ty; } 260 261IntegerType *Type::getIntNTy(LLVMContext &C, unsigned N) { 262 return IntegerType::get(C, N); 263} 264 265PointerType *Type::getHalfPtrTy(LLVMContext &C, unsigned AS) { 266 return getHalfTy(C)->getPointerTo(AS); 267} 268 269PointerType *Type::getFloatPtrTy(LLVMContext &C, unsigned AS) { 270 return getFloatTy(C)->getPointerTo(AS); 271} 272 273PointerType *Type::getDoublePtrTy(LLVMContext &C, unsigned AS) { 274 return getDoubleTy(C)->getPointerTo(AS); 275} 276 277PointerType *Type::getX86_FP80PtrTy(LLVMContext &C, unsigned AS) { 278 return getX86_FP80Ty(C)->getPointerTo(AS); 279} 280 281PointerType *Type::getFP128PtrTy(LLVMContext &C, unsigned AS) { 282 return getFP128Ty(C)->getPointerTo(AS); 283} 284 285PointerType *Type::getPPC_FP128PtrTy(LLVMContext &C, unsigned AS) { 286 return getPPC_FP128Ty(C)->getPointerTo(AS); 287} 288 289PointerType *Type::getX86_MMXPtrTy(LLVMContext &C, unsigned AS) { 290 return getX86_MMXTy(C)->getPointerTo(AS); 291} 292 293PointerType *Type::getIntNPtrTy(LLVMContext &C, unsigned N, unsigned AS) { 294 return getIntNTy(C, N)->getPointerTo(AS); 295} 296 297PointerType *Type::getInt1PtrTy(LLVMContext &C, unsigned AS) { 298 return getInt1Ty(C)->getPointerTo(AS); 299} 300 301PointerType *Type::getInt8PtrTy(LLVMContext &C, unsigned AS) { 302 return getInt8Ty(C)->getPointerTo(AS); 303} 304 305PointerType *Type::getInt16PtrTy(LLVMContext &C, unsigned AS) { 306 return getInt16Ty(C)->getPointerTo(AS); 307} 308 309PointerType *Type::getInt32PtrTy(LLVMContext &C, unsigned AS) { 310 return getInt32Ty(C)->getPointerTo(AS); 311} 312 313PointerType *Type::getInt64PtrTy(LLVMContext &C, unsigned AS) { 314 return getInt64Ty(C)->getPointerTo(AS); 315} 316 317 318//===----------------------------------------------------------------------===// 319// IntegerType Implementation 320//===----------------------------------------------------------------------===// 321 322IntegerType *IntegerType::get(LLVMContext &C, unsigned NumBits) { 323 assert(NumBits >= MIN_INT_BITS && "bitwidth too small"); 324 assert(NumBits <= MAX_INT_BITS && "bitwidth too large"); 325 326 // Check for the built-in integer types 327 switch (NumBits) { 328 case 1: return cast<IntegerType>(Type::getInt1Ty(C)); 329 case 8: return cast<IntegerType>(Type::getInt8Ty(C)); 330 case 16: return cast<IntegerType>(Type::getInt16Ty(C)); 331 case 32: return cast<IntegerType>(Type::getInt32Ty(C)); 332 case 64: return cast<IntegerType>(Type::getInt64Ty(C)); 333 default: 334 break; 335 } 336 337 IntegerType *&Entry = C.pImpl->IntegerTypes[NumBits]; 338 339 if (Entry == 0) 340 Entry = new (C.pImpl->TypeAllocator) IntegerType(C, NumBits); 341 342 return Entry; 343} 344 345bool IntegerType::isPowerOf2ByteWidth() const { 346 unsigned BitWidth = getBitWidth(); 347 return (BitWidth > 7) && isPowerOf2_32(BitWidth); 348} 349 350APInt IntegerType::getMask() const { 351 return APInt::getAllOnesValue(getBitWidth()); 352} 353 354//===----------------------------------------------------------------------===// 355// FunctionType Implementation 356//===----------------------------------------------------------------------===// 357 358FunctionType::FunctionType(Type *Result, ArrayRef<Type*> Params, 359 bool IsVarArgs) 360 : Type(Result->getContext(), FunctionTyID) { 361 Type **SubTys = reinterpret_cast<Type**>(this+1); 362 assert(isValidReturnType(Result) && "invalid return type for function"); 363 setSubclassData(IsVarArgs); 364 365 SubTys[0] = const_cast<Type*>(Result); 366 367 for (unsigned i = 0, e = Params.size(); i != e; ++i) { 368 assert(isValidArgumentType(Params[i]) && 369 "Not a valid type for function argument!"); 370 SubTys[i+1] = Params[i]; 371 } 372 373 ContainedTys = SubTys; 374 NumContainedTys = Params.size() + 1; // + 1 for result type 375} 376 377// FunctionType::get - The factory function for the FunctionType class. 378FunctionType *FunctionType::get(Type *ReturnType, 379 ArrayRef<Type*> Params, bool isVarArg) { 380 LLVMContextImpl *pImpl = ReturnType->getContext().pImpl; 381 FunctionTypeKeyInfo::KeyTy Key(ReturnType, Params, isVarArg); 382 LLVMContextImpl::FunctionTypeMap::iterator I = 383 pImpl->FunctionTypes.find_as(Key); 384 FunctionType *FT; 385 386 if (I == pImpl->FunctionTypes.end()) { 387 FT = (FunctionType*) pImpl->TypeAllocator. 388 Allocate(sizeof(FunctionType) + sizeof(Type*) * (Params.size() + 1), 389 AlignOf<FunctionType>::Alignment); 390 new (FT) FunctionType(ReturnType, Params, isVarArg); 391 pImpl->FunctionTypes[FT] = true; 392 } else { 393 FT = I->first; 394 } 395 396 return FT; 397} 398 399FunctionType *FunctionType::get(Type *Result, bool isVarArg) { 400 return get(Result, ArrayRef<Type *>(), isVarArg); 401} 402 403/// isValidReturnType - Return true if the specified type is valid as a return 404/// type. 405bool FunctionType::isValidReturnType(Type *RetTy) { 406 return !RetTy->isFunctionTy() && !RetTy->isLabelTy() && 407 !RetTy->isMetadataTy(); 408} 409 410/// isValidArgumentType - Return true if the specified type is valid as an 411/// argument type. 412bool FunctionType::isValidArgumentType(Type *ArgTy) { 413 return ArgTy->isFirstClassType(); 414} 415 416//===----------------------------------------------------------------------===// 417// StructType Implementation 418//===----------------------------------------------------------------------===// 419 420// Primitive Constructors. 421 422StructType *StructType::get(LLVMContext &Context, ArrayRef<Type*> ETypes, 423 bool isPacked) { 424 LLVMContextImpl *pImpl = Context.pImpl; 425 AnonStructTypeKeyInfo::KeyTy Key(ETypes, isPacked); 426 LLVMContextImpl::StructTypeMap::iterator I = 427 pImpl->AnonStructTypes.find_as(Key); 428 StructType *ST; 429 430 if (I == pImpl->AnonStructTypes.end()) { 431 // Value not found. Create a new type! 432 ST = new (Context.pImpl->TypeAllocator) StructType(Context); 433 ST->setSubclassData(SCDB_IsLiteral); // Literal struct. 434 ST->setBody(ETypes, isPacked); 435 Context.pImpl->AnonStructTypes[ST] = true; 436 } else { 437 ST = I->first; 438 } 439 440 return ST; 441} 442 443void StructType::setBody(ArrayRef<Type*> Elements, bool isPacked) { 444 assert(isOpaque() && "Struct body already set!"); 445 446 setSubclassData(getSubclassData() | SCDB_HasBody); 447 if (isPacked) 448 setSubclassData(getSubclassData() | SCDB_Packed); 449 450 unsigned NumElements = Elements.size(); 451 Type **Elts = getContext().pImpl->TypeAllocator.Allocate<Type*>(NumElements); 452 memcpy(Elts, Elements.data(), sizeof(Elements[0]) * NumElements); 453 454 ContainedTys = Elts; 455 NumContainedTys = NumElements; 456} 457 458void StructType::setName(StringRef Name) { 459 if (Name == getName()) return; 460 461 StringMap<StructType *> &SymbolTable = getContext().pImpl->NamedStructTypes; 462 typedef StringMap<StructType *>::MapEntryTy EntryTy; 463 464 // If this struct already had a name, remove its symbol table entry. Don't 465 // delete the data yet because it may be part of the new name. 466 if (SymbolTableEntry) 467 SymbolTable.remove((EntryTy *)SymbolTableEntry); 468 469 // If this is just removing the name, we're done. 470 if (Name.empty()) { 471 if (SymbolTableEntry) { 472 // Delete the old string data. 473 ((EntryTy *)SymbolTableEntry)->Destroy(SymbolTable.getAllocator()); 474 SymbolTableEntry = 0; 475 } 476 return; 477 } 478 479 // Look up the entry for the name. 480 EntryTy *Entry = &getContext().pImpl->NamedStructTypes.GetOrCreateValue(Name); 481 482 // While we have a name collision, try a random rename. 483 if (Entry->getValue()) { 484 SmallString<64> TempStr(Name); 485 TempStr.push_back('.'); 486 raw_svector_ostream TmpStream(TempStr); 487 unsigned NameSize = Name.size(); 488 489 do { 490 TempStr.resize(NameSize + 1); 491 TmpStream.resync(); 492 TmpStream << getContext().pImpl->NamedStructTypesUniqueID++; 493 494 Entry = &getContext().pImpl-> 495 NamedStructTypes.GetOrCreateValue(TmpStream.str()); 496 } while (Entry->getValue()); 497 } 498 499 // Okay, we found an entry that isn't used. It's us! 500 Entry->setValue(this); 501 502 // Delete the old string data. 503 if (SymbolTableEntry) 504 ((EntryTy *)SymbolTableEntry)->Destroy(SymbolTable.getAllocator()); 505 SymbolTableEntry = Entry; 506} 507 508//===----------------------------------------------------------------------===// 509// StructType Helper functions. 510 511StructType *StructType::create(LLVMContext &Context, StringRef Name) { 512 StructType *ST = new (Context.pImpl->TypeAllocator) StructType(Context); 513 if (!Name.empty()) 514 ST->setName(Name); 515 return ST; 516} 517 518StructType *StructType::get(LLVMContext &Context, bool isPacked) { 519 return get(Context, llvm::ArrayRef<Type*>(), isPacked); 520} 521 522StructType *StructType::get(Type *type, ...) { 523 assert(type != 0 && "Cannot create a struct type with no elements with this"); 524 LLVMContext &Ctx = type->getContext(); 525 va_list ap; 526 SmallVector<llvm::Type*, 8> StructFields; 527 va_start(ap, type); 528 while (type) { 529 StructFields.push_back(type); 530 type = va_arg(ap, llvm::Type*); 531 } 532 return llvm::StructType::get(Ctx, StructFields); 533} 534 535StructType *StructType::create(LLVMContext &Context, ArrayRef<Type*> Elements, 536 StringRef Name, bool isPacked) { 537 StructType *ST = create(Context, Name); 538 ST->setBody(Elements, isPacked); 539 return ST; 540} 541 542StructType *StructType::create(LLVMContext &Context, ArrayRef<Type*> Elements) { 543 return create(Context, Elements, StringRef()); 544} 545 546StructType *StructType::create(LLVMContext &Context) { 547 return create(Context, StringRef()); 548} 549 550StructType *StructType::create(ArrayRef<Type*> Elements, StringRef Name, 551 bool isPacked) { 552 assert(!Elements.empty() && 553 "This method may not be invoked with an empty list"); 554 return create(Elements[0]->getContext(), Elements, Name, isPacked); 555} 556 557StructType *StructType::create(ArrayRef<Type*> Elements) { 558 assert(!Elements.empty() && 559 "This method may not be invoked with an empty list"); 560 return create(Elements[0]->getContext(), Elements, StringRef()); 561} 562 563StructType *StructType::create(StringRef Name, Type *type, ...) { 564 assert(type != 0 && "Cannot create a struct type with no elements with this"); 565 LLVMContext &Ctx = type->getContext(); 566 va_list ap; 567 SmallVector<llvm::Type*, 8> StructFields; 568 va_start(ap, type); 569 while (type) { 570 StructFields.push_back(type); 571 type = va_arg(ap, llvm::Type*); 572 } 573 return llvm::StructType::create(Ctx, StructFields, Name); 574} 575 576bool StructType::isSized() const { 577 if ((getSubclassData() & SCDB_IsSized) != 0) 578 return true; 579 if (isOpaque()) 580 return false; 581 582 // Okay, our struct is sized if all of the elements are, but if one of the 583 // elements is opaque, the struct isn't sized *yet*, but may become sized in 584 // the future, so just bail out without caching. 585 for (element_iterator I = element_begin(), E = element_end(); I != E; ++I) 586 if (!(*I)->isSized()) 587 return false; 588 589 // Here we cheat a bit and cast away const-ness. The goal is to memoize when 590 // we find a sized type, as types can only move from opaque to sized, not the 591 // other way. 592 const_cast<StructType*>(this)->setSubclassData( 593 getSubclassData() | SCDB_IsSized); 594 return true; 595} 596 597StringRef StructType::getName() const { 598 assert(!isLiteral() && "Literal structs never have names"); 599 if (SymbolTableEntry == 0) return StringRef(); 600 601 return ((StringMapEntry<StructType*> *)SymbolTableEntry)->getKey(); 602} 603 604void StructType::setBody(Type *type, ...) { 605 assert(type != 0 && "Cannot create a struct type with no elements with this"); 606 va_list ap; 607 SmallVector<llvm::Type*, 8> StructFields; 608 va_start(ap, type); 609 while (type) { 610 StructFields.push_back(type); 611 type = va_arg(ap, llvm::Type*); 612 } 613 setBody(StructFields); 614} 615 616bool StructType::isValidElementType(Type *ElemTy) { 617 return !ElemTy->isVoidTy() && !ElemTy->isLabelTy() && 618 !ElemTy->isMetadataTy() && !ElemTy->isFunctionTy(); 619} 620 621/// isLayoutIdentical - Return true if this is layout identical to the 622/// specified struct. 623bool StructType::isLayoutIdentical(StructType *Other) const { 624 if (this == Other) return true; 625 626 if (isPacked() != Other->isPacked() || 627 getNumElements() != Other->getNumElements()) 628 return false; 629 630 return std::equal(element_begin(), element_end(), Other->element_begin()); 631} 632 633/// getTypeByName - Return the type with the specified name, or null if there 634/// is none by that name. 635StructType *Module::getTypeByName(StringRef Name) const { 636 StringMap<StructType*>::iterator I = 637 getContext().pImpl->NamedStructTypes.find(Name); 638 if (I != getContext().pImpl->NamedStructTypes.end()) 639 return I->second; 640 return 0; 641} 642 643 644//===----------------------------------------------------------------------===// 645// CompositeType Implementation 646//===----------------------------------------------------------------------===// 647 648Type *CompositeType::getTypeAtIndex(const Value *V) { 649 if (StructType *STy = dyn_cast<StructType>(this)) { 650 unsigned Idx = (unsigned)cast<ConstantInt>(V)->getZExtValue(); 651 assert(indexValid(Idx) && "Invalid structure index!"); 652 return STy->getElementType(Idx); 653 } 654 655 return cast<SequentialType>(this)->getElementType(); 656} 657Type *CompositeType::getTypeAtIndex(unsigned Idx) { 658 if (StructType *STy = dyn_cast<StructType>(this)) { 659 assert(indexValid(Idx) && "Invalid structure index!"); 660 return STy->getElementType(Idx); 661 } 662 663 return cast<SequentialType>(this)->getElementType(); 664} 665bool CompositeType::indexValid(const Value *V) const { 666 if (const StructType *STy = dyn_cast<StructType>(this)) { 667 // Structure indexes require 32-bit integer constants. 668 if (V->getType()->isIntegerTy(32)) 669 if (const ConstantInt *CU = dyn_cast<ConstantInt>(V)) 670 return CU->getZExtValue() < STy->getNumElements(); 671 return false; 672 } 673 674 // Sequential types can be indexed by any integer. 675 return V->getType()->isIntegerTy(); 676} 677 678bool CompositeType::indexValid(unsigned Idx) const { 679 if (const StructType *STy = dyn_cast<StructType>(this)) 680 return Idx < STy->getNumElements(); 681 // Sequential types can be indexed by any integer. 682 return true; 683} 684 685 686//===----------------------------------------------------------------------===// 687// ArrayType Implementation 688//===----------------------------------------------------------------------===// 689 690ArrayType::ArrayType(Type *ElType, uint64_t NumEl) 691 : SequentialType(ArrayTyID, ElType) { 692 NumElements = NumEl; 693} 694 695ArrayType *ArrayType::get(Type *elementType, uint64_t NumElements) { 696 Type *ElementType = const_cast<Type*>(elementType); 697 assert(isValidElementType(ElementType) && "Invalid type for array element!"); 698 699 LLVMContextImpl *pImpl = ElementType->getContext().pImpl; 700 ArrayType *&Entry = 701 pImpl->ArrayTypes[std::make_pair(ElementType, NumElements)]; 702 703 if (Entry == 0) 704 Entry = new (pImpl->TypeAllocator) ArrayType(ElementType, NumElements); 705 return Entry; 706} 707 708bool ArrayType::isValidElementType(Type *ElemTy) { 709 return !ElemTy->isVoidTy() && !ElemTy->isLabelTy() && 710 !ElemTy->isMetadataTy() && !ElemTy->isFunctionTy(); 711} 712 713//===----------------------------------------------------------------------===// 714// VectorType Implementation 715//===----------------------------------------------------------------------===// 716 717VectorType::VectorType(Type *ElType, unsigned NumEl) 718 : SequentialType(VectorTyID, ElType) { 719 NumElements = NumEl; 720} 721 722VectorType *VectorType::get(Type *elementType, unsigned NumElements) { 723 Type *ElementType = const_cast<Type*>(elementType); 724 assert(NumElements > 0 && "#Elements of a VectorType must be greater than 0"); 725 assert(isValidElementType(ElementType) && 726 "Elements of a VectorType must be a primitive type"); 727 728 LLVMContextImpl *pImpl = ElementType->getContext().pImpl; 729 VectorType *&Entry = ElementType->getContext().pImpl 730 ->VectorTypes[std::make_pair(ElementType, NumElements)]; 731 732 if (Entry == 0) 733 Entry = new (pImpl->TypeAllocator) VectorType(ElementType, NumElements); 734 return Entry; 735} 736 737bool VectorType::isValidElementType(Type *ElemTy) { 738 if (PointerType *PTy = dyn_cast<PointerType>(ElemTy)) 739 ElemTy = PTy->getElementType(); 740 return ElemTy->isIntegerTy() || ElemTy->isFloatingPointTy(); 741} 742 743//===----------------------------------------------------------------------===// 744// PointerType Implementation 745//===----------------------------------------------------------------------===// 746 747PointerType *PointerType::get(Type *EltTy, unsigned AddressSpace) { 748 assert(EltTy && "Can't get a pointer to <null> type!"); 749 assert(isValidElementType(EltTy) && "Invalid type for pointer element!"); 750 751 LLVMContextImpl *CImpl = EltTy->getContext().pImpl; 752 753 // Since AddressSpace #0 is the common case, we special case it. 754 PointerType *&Entry = AddressSpace == 0 ? CImpl->PointerTypes[EltTy] 755 : CImpl->ASPointerTypes[std::make_pair(EltTy, AddressSpace)]; 756 757 if (Entry == 0) 758 Entry = new (CImpl->TypeAllocator) PointerType(EltTy, AddressSpace); 759 return Entry; 760} 761 762 763PointerType::PointerType(Type *E, unsigned AddrSpace) 764 : SequentialType(PointerTyID, E) { 765#ifndef NDEBUG 766 const unsigned oldNCT = NumContainedTys; 767#endif 768 setSubclassData(AddrSpace); 769 // Check for miscompile. PR11652. 770 assert(oldNCT == NumContainedTys && "bitfield written out of bounds?"); 771} 772 773PointerType *Type::getPointerTo(unsigned addrs) { 774 return PointerType::get(this, addrs); 775} 776 777bool PointerType::isValidElementType(Type *ElemTy) { 778 return !ElemTy->isVoidTy() && !ElemTy->isLabelTy() && 779 !ElemTy->isMetadataTy(); 780} 781