651 lines
22 KiB
C++
651 lines
22 KiB
C++
//===- Type.cpp - Implement the Type class --------------------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file implements the Type class for the IR library.
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//
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//===----------------------------------------------------------------------===//
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#include "LLVMContextImpl.h"
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#include "llvm/ADT/APInt.h"
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#include "llvm/ADT/None.h"
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#include "llvm/ADT/SmallString.h"
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#include "llvm/ADT/StringMap.h"
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#include "llvm/ADT/StringRef.h"
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#include "llvm/IR/Constant.h"
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#include "llvm/IR/Constants.h"
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#include "llvm/IR/DerivedTypes.h"
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#include "llvm/IR/LLVMContext.h"
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#include "llvm/IR/Module.h"
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#include "llvm/IR/Type.h"
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#include "llvm/IR/Value.h"
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#include "llvm/Support/Casting.h"
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#include "llvm/Support/MathExtras.h"
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#include "llvm/Support/raw_ostream.h"
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#include <cassert>
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#include <utility>
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using namespace llvm;
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//===----------------------------------------------------------------------===//
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// Type Class Implementation
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//===----------------------------------------------------------------------===//
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Type *Type::getPrimitiveType(LLVMContext &C, TypeID IDNumber) {
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switch (IDNumber) {
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case VoidTyID : return getVoidTy(C);
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case HalfTyID : return getHalfTy(C);
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case FloatTyID : return getFloatTy(C);
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case DoubleTyID : return getDoubleTy(C);
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case X86_FP80TyID : return getX86_FP80Ty(C);
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case FP128TyID : return getFP128Ty(C);
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case PPC_FP128TyID : return getPPC_FP128Ty(C);
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case LabelTyID : return getLabelTy(C);
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case MetadataTyID : return getMetadataTy(C);
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case X86_MMXTyID : return getX86_MMXTy(C);
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case TokenTyID : return getTokenTy(C);
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default:
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return nullptr;
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}
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}
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bool Type::isIntegerTy(unsigned Bitwidth) const {
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return isIntegerTy() && cast<IntegerType>(this)->getBitWidth() == Bitwidth;
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}
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bool Type::canLosslesslyBitCastTo(Type *Ty) const {
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// Identity cast means no change so return true
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if (this == Ty)
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return true;
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// They are not convertible unless they are at least first class types
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if (!this->isFirstClassType() || !Ty->isFirstClassType())
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return false;
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// Vector -> Vector conversions are always lossless if the two vector types
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// have the same size, otherwise not. Also, 64-bit vector types can be
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// converted to x86mmx.
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if (auto *thisPTy = dyn_cast<VectorType>(this)) {
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if (auto *thatPTy = dyn_cast<VectorType>(Ty))
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return thisPTy->getBitWidth() == thatPTy->getBitWidth();
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if (Ty->getTypeID() == Type::X86_MMXTyID &&
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thisPTy->getBitWidth() == 64)
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return true;
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}
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if (this->getTypeID() == Type::X86_MMXTyID)
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if (auto *thatPTy = dyn_cast<VectorType>(Ty))
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if (thatPTy->getBitWidth() == 64)
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return true;
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// At this point we have only various mismatches of the first class types
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// remaining and ptr->ptr. Just select the lossless conversions. Everything
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// else is not lossless. Conservatively assume we can't losslessly convert
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// between pointers with different address spaces.
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if (auto *PTy = dyn_cast<PointerType>(this)) {
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if (auto *OtherPTy = dyn_cast<PointerType>(Ty))
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return PTy->getAddressSpace() == OtherPTy->getAddressSpace();
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return false;
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}
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return false; // Other types have no identity values
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}
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bool Type::isEmptyTy() const {
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if (auto *ATy = dyn_cast<ArrayType>(this)) {
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unsigned NumElements = ATy->getNumElements();
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return NumElements == 0 || ATy->getElementType()->isEmptyTy();
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}
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if (auto *STy = dyn_cast<StructType>(this)) {
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unsigned NumElements = STy->getNumElements();
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for (unsigned i = 0; i < NumElements; ++i)
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if (!STy->getElementType(i)->isEmptyTy())
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return false;
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return true;
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}
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return false;
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}
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unsigned Type::getPrimitiveSizeInBits() const {
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switch (getTypeID()) {
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case Type::HalfTyID: return 16;
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case Type::FloatTyID: return 32;
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case Type::DoubleTyID: return 64;
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case Type::X86_FP80TyID: return 80;
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case Type::FP128TyID: return 128;
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case Type::PPC_FP128TyID: return 128;
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case Type::X86_MMXTyID: return 64;
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case Type::IntegerTyID: return cast<IntegerType>(this)->getBitWidth();
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case Type::VectorTyID: return cast<VectorType>(this)->getBitWidth();
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default: return 0;
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}
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}
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unsigned Type::getScalarSizeInBits() const {
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return getScalarType()->getPrimitiveSizeInBits();
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}
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int Type::getFPMantissaWidth() const {
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if (auto *VTy = dyn_cast<VectorType>(this))
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return VTy->getElementType()->getFPMantissaWidth();
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assert(isFloatingPointTy() && "Not a floating point type!");
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if (getTypeID() == HalfTyID) return 11;
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if (getTypeID() == FloatTyID) return 24;
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if (getTypeID() == DoubleTyID) return 53;
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if (getTypeID() == X86_FP80TyID) return 64;
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if (getTypeID() == FP128TyID) return 113;
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assert(getTypeID() == PPC_FP128TyID && "unknown fp type");
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return -1;
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}
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bool Type::isSizedDerivedType(SmallPtrSetImpl<Type*> *Visited) const {
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if (auto *ATy = dyn_cast<ArrayType>(this))
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return ATy->getElementType()->isSized(Visited);
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if (auto *VTy = dyn_cast<VectorType>(this))
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return VTy->getElementType()->isSized(Visited);
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return cast<StructType>(this)->isSized(Visited);
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}
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//===----------------------------------------------------------------------===//
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// Primitive 'Type' data
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//===----------------------------------------------------------------------===//
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Type *Type::getVoidTy(LLVMContext &C) { return &C.pImpl->VoidTy; }
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Type *Type::getLabelTy(LLVMContext &C) { return &C.pImpl->LabelTy; }
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Type *Type::getHalfTy(LLVMContext &C) { return &C.pImpl->HalfTy; }
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Type *Type::getFloatTy(LLVMContext &C) { return &C.pImpl->FloatTy; }
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Type *Type::getDoubleTy(LLVMContext &C) { return &C.pImpl->DoubleTy; }
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Type *Type::getMetadataTy(LLVMContext &C) { return &C.pImpl->MetadataTy; }
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Type *Type::getTokenTy(LLVMContext &C) { return &C.pImpl->TokenTy; }
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Type *Type::getX86_FP80Ty(LLVMContext &C) { return &C.pImpl->X86_FP80Ty; }
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Type *Type::getFP128Ty(LLVMContext &C) { return &C.pImpl->FP128Ty; }
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Type *Type::getPPC_FP128Ty(LLVMContext &C) { return &C.pImpl->PPC_FP128Ty; }
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Type *Type::getX86_MMXTy(LLVMContext &C) { return &C.pImpl->X86_MMXTy; }
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IntegerType *Type::getInt1Ty(LLVMContext &C) { return &C.pImpl->Int1Ty; }
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IntegerType *Type::getInt8Ty(LLVMContext &C) { return &C.pImpl->Int8Ty; }
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IntegerType *Type::getInt16Ty(LLVMContext &C) { return &C.pImpl->Int16Ty; }
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IntegerType *Type::getInt32Ty(LLVMContext &C) { return &C.pImpl->Int32Ty; }
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IntegerType *Type::getInt64Ty(LLVMContext &C) { return &C.pImpl->Int64Ty; }
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IntegerType *Type::getInt128Ty(LLVMContext &C) { return &C.pImpl->Int128Ty; }
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IntegerType *Type::getIntNTy(LLVMContext &C, unsigned N) {
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return IntegerType::get(C, N);
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}
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PointerType *Type::getHalfPtrTy(LLVMContext &C, unsigned AS) {
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return getHalfTy(C)->getPointerTo(AS);
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}
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PointerType *Type::getFloatPtrTy(LLVMContext &C, unsigned AS) {
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return getFloatTy(C)->getPointerTo(AS);
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}
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PointerType *Type::getDoublePtrTy(LLVMContext &C, unsigned AS) {
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return getDoubleTy(C)->getPointerTo(AS);
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}
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PointerType *Type::getX86_FP80PtrTy(LLVMContext &C, unsigned AS) {
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return getX86_FP80Ty(C)->getPointerTo(AS);
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}
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PointerType *Type::getFP128PtrTy(LLVMContext &C, unsigned AS) {
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return getFP128Ty(C)->getPointerTo(AS);
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}
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PointerType *Type::getPPC_FP128PtrTy(LLVMContext &C, unsigned AS) {
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return getPPC_FP128Ty(C)->getPointerTo(AS);
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}
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PointerType *Type::getX86_MMXPtrTy(LLVMContext &C, unsigned AS) {
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return getX86_MMXTy(C)->getPointerTo(AS);
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}
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PointerType *Type::getIntNPtrTy(LLVMContext &C, unsigned N, unsigned AS) {
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return getIntNTy(C, N)->getPointerTo(AS);
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}
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PointerType *Type::getInt1PtrTy(LLVMContext &C, unsigned AS) {
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return getInt1Ty(C)->getPointerTo(AS);
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}
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PointerType *Type::getInt8PtrTy(LLVMContext &C, unsigned AS) {
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return getInt8Ty(C)->getPointerTo(AS);
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}
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PointerType *Type::getInt16PtrTy(LLVMContext &C, unsigned AS) {
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return getInt16Ty(C)->getPointerTo(AS);
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}
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PointerType *Type::getInt32PtrTy(LLVMContext &C, unsigned AS) {
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return getInt32Ty(C)->getPointerTo(AS);
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}
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PointerType *Type::getInt64PtrTy(LLVMContext &C, unsigned AS) {
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return getInt64Ty(C)->getPointerTo(AS);
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}
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//===----------------------------------------------------------------------===//
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// IntegerType Implementation
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//===----------------------------------------------------------------------===//
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IntegerType *IntegerType::get(LLVMContext &C, unsigned NumBits) {
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assert(NumBits >= MIN_INT_BITS && "bitwidth too small");
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assert(NumBits <= MAX_INT_BITS && "bitwidth too large");
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// Check for the built-in integer types
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switch (NumBits) {
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case 1: return cast<IntegerType>(Type::getInt1Ty(C));
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case 8: return cast<IntegerType>(Type::getInt8Ty(C));
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case 16: return cast<IntegerType>(Type::getInt16Ty(C));
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case 32: return cast<IntegerType>(Type::getInt32Ty(C));
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case 64: return cast<IntegerType>(Type::getInt64Ty(C));
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case 128: return cast<IntegerType>(Type::getInt128Ty(C));
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default:
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break;
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}
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IntegerType *&Entry = C.pImpl->IntegerTypes[NumBits];
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if (!Entry)
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Entry = new (C.pImpl->TypeAllocator) IntegerType(C, NumBits);
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return Entry;
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}
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bool IntegerType::isPowerOf2ByteWidth() const {
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unsigned BitWidth = getBitWidth();
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return (BitWidth > 7) && isPowerOf2_32(BitWidth);
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}
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APInt IntegerType::getMask() const {
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return APInt::getAllOnesValue(getBitWidth());
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}
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//===----------------------------------------------------------------------===//
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// FunctionType Implementation
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//===----------------------------------------------------------------------===//
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FunctionType::FunctionType(Type *Result, ArrayRef<Type*> Params,
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bool IsVarArgs)
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: Type(Result->getContext(), FunctionTyID) {
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Type **SubTys = reinterpret_cast<Type**>(this+1);
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assert(isValidReturnType(Result) && "invalid return type for function");
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setSubclassData(IsVarArgs);
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SubTys[0] = Result;
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for (unsigned i = 0, e = Params.size(); i != e; ++i) {
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assert(isValidArgumentType(Params[i]) &&
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"Not a valid type for function argument!");
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SubTys[i+1] = Params[i];
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}
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ContainedTys = SubTys;
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NumContainedTys = Params.size() + 1; // + 1 for result type
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}
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// This is the factory function for the FunctionType class.
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FunctionType *FunctionType::get(Type *ReturnType,
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ArrayRef<Type*> Params, bool isVarArg) {
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LLVMContextImpl *pImpl = ReturnType->getContext().pImpl;
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FunctionTypeKeyInfo::KeyTy Key(ReturnType, Params, isVarArg);
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auto I = pImpl->FunctionTypes.find_as(Key);
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FunctionType *FT;
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if (I == pImpl->FunctionTypes.end()) {
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FT = (FunctionType *)pImpl->TypeAllocator.Allocate(
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sizeof(FunctionType) + sizeof(Type *) * (Params.size() + 1),
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alignof(FunctionType));
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new (FT) FunctionType(ReturnType, Params, isVarArg);
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pImpl->FunctionTypes.insert(FT);
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} else {
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FT = *I;
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}
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return FT;
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}
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FunctionType *FunctionType::get(Type *Result, bool isVarArg) {
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return get(Result, None, isVarArg);
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}
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bool FunctionType::isValidReturnType(Type *RetTy) {
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return !RetTy->isFunctionTy() && !RetTy->isLabelTy() &&
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!RetTy->isMetadataTy();
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}
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bool FunctionType::isValidArgumentType(Type *ArgTy) {
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return ArgTy->isFirstClassType();
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}
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//===----------------------------------------------------------------------===//
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// StructType Implementation
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//===----------------------------------------------------------------------===//
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// Primitive Constructors.
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StructType *StructType::get(LLVMContext &Context, ArrayRef<Type*> ETypes,
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bool isPacked) {
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LLVMContextImpl *pImpl = Context.pImpl;
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AnonStructTypeKeyInfo::KeyTy Key(ETypes, isPacked);
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auto I = pImpl->AnonStructTypes.find_as(Key);
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StructType *ST;
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if (I == pImpl->AnonStructTypes.end()) {
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// Value not found. Create a new type!
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ST = new (Context.pImpl->TypeAllocator) StructType(Context);
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ST->setSubclassData(SCDB_IsLiteral); // Literal struct.
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ST->setBody(ETypes, isPacked);
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Context.pImpl->AnonStructTypes.insert(ST);
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} else {
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ST = *I;
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}
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return ST;
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}
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void StructType::setBody(ArrayRef<Type*> Elements, bool isPacked) {
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assert(isOpaque() && "Struct body already set!");
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setSubclassData(getSubclassData() | SCDB_HasBody);
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if (isPacked)
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setSubclassData(getSubclassData() | SCDB_Packed);
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NumContainedTys = Elements.size();
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if (Elements.empty()) {
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ContainedTys = nullptr;
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return;
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}
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ContainedTys = Elements.copy(getContext().pImpl->TypeAllocator).data();
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}
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void StructType::setName(StringRef Name) {
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if (Name == getName()) return;
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StringMap<StructType *> &SymbolTable = getContext().pImpl->NamedStructTypes;
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using EntryTy = StringMap<StructType *>::MapEntryTy;
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// If this struct already had a name, remove its symbol table entry. Don't
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// delete the data yet because it may be part of the new name.
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if (SymbolTableEntry)
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SymbolTable.remove((EntryTy *)SymbolTableEntry);
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// If this is just removing the name, we're done.
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if (Name.empty()) {
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if (SymbolTableEntry) {
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// Delete the old string data.
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((EntryTy *)SymbolTableEntry)->Destroy(SymbolTable.getAllocator());
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SymbolTableEntry = nullptr;
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}
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return;
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}
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// Look up the entry for the name.
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auto IterBool =
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getContext().pImpl->NamedStructTypes.insert(std::make_pair(Name, this));
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// While we have a name collision, try a random rename.
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if (!IterBool.second) {
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SmallString<64> TempStr(Name);
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TempStr.push_back('.');
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raw_svector_ostream TmpStream(TempStr);
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unsigned NameSize = Name.size();
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do {
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TempStr.resize(NameSize + 1);
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TmpStream << getContext().pImpl->NamedStructTypesUniqueID++;
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IterBool = getContext().pImpl->NamedStructTypes.insert(
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std::make_pair(TmpStream.str(), this));
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} while (!IterBool.second);
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}
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// Delete the old string data.
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if (SymbolTableEntry)
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((EntryTy *)SymbolTableEntry)->Destroy(SymbolTable.getAllocator());
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SymbolTableEntry = &*IterBool.first;
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}
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//===----------------------------------------------------------------------===//
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// StructType Helper functions.
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StructType *StructType::create(LLVMContext &Context, StringRef Name) {
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StructType *ST = new (Context.pImpl->TypeAllocator) StructType(Context);
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if (!Name.empty())
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ST->setName(Name);
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return ST;
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}
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StructType *StructType::get(LLVMContext &Context, bool isPacked) {
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return get(Context, None, isPacked);
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}
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StructType *StructType::create(LLVMContext &Context, ArrayRef<Type*> Elements,
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StringRef Name, bool isPacked) {
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StructType *ST = create(Context, Name);
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ST->setBody(Elements, isPacked);
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return ST;
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}
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StructType *StructType::create(LLVMContext &Context, ArrayRef<Type*> Elements) {
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return create(Context, Elements, StringRef());
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}
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StructType *StructType::create(LLVMContext &Context) {
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return create(Context, StringRef());
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}
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StructType *StructType::create(ArrayRef<Type*> Elements, StringRef Name,
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bool isPacked) {
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assert(!Elements.empty() &&
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"This method may not be invoked with an empty list");
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return create(Elements[0]->getContext(), Elements, Name, isPacked);
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}
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StructType *StructType::create(ArrayRef<Type*> Elements) {
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assert(!Elements.empty() &&
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"This method may not be invoked with an empty list");
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return create(Elements[0]->getContext(), Elements, StringRef());
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}
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bool StructType::isSized(SmallPtrSetImpl<Type*> *Visited) const {
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if ((getSubclassData() & SCDB_IsSized) != 0)
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return true;
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if (isOpaque())
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return false;
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if (Visited && !Visited->insert(const_cast<StructType*>(this)).second)
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return false;
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// Okay, our struct is sized if all of the elements are, but if one of the
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// elements is opaque, the struct isn't sized *yet*, but may become sized in
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// the future, so just bail out without caching.
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for (element_iterator I = element_begin(), E = element_end(); I != E; ++I)
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if (!(*I)->isSized(Visited))
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return false;
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// Here we cheat a bit and cast away const-ness. The goal is to memoize when
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// we find a sized type, as types can only move from opaque to sized, not the
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// other way.
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const_cast<StructType*>(this)->setSubclassData(
|
|
getSubclassData() | SCDB_IsSized);
|
|
return true;
|
|
}
|
|
|
|
StringRef StructType::getName() const {
|
|
assert(!isLiteral() && "Literal structs never have names");
|
|
if (!SymbolTableEntry) return StringRef();
|
|
|
|
return ((StringMapEntry<StructType*> *)SymbolTableEntry)->getKey();
|
|
}
|
|
|
|
bool StructType::isValidElementType(Type *ElemTy) {
|
|
return !ElemTy->isVoidTy() && !ElemTy->isLabelTy() &&
|
|
!ElemTy->isMetadataTy() && !ElemTy->isFunctionTy() &&
|
|
!ElemTy->isTokenTy();
|
|
}
|
|
|
|
bool StructType::isLayoutIdentical(StructType *Other) const {
|
|
if (this == Other) return true;
|
|
|
|
if (isPacked() != Other->isPacked())
|
|
return false;
|
|
|
|
return elements() == Other->elements();
|
|
}
|
|
|
|
StructType *Module::getTypeByName(StringRef Name) const {
|
|
return getContext().pImpl->NamedStructTypes.lookup(Name);
|
|
}
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
// CompositeType Implementation
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
Type *CompositeType::getTypeAtIndex(const Value *V) const {
|
|
if (auto *STy = dyn_cast<StructType>(this)) {
|
|
unsigned Idx =
|
|
(unsigned)cast<Constant>(V)->getUniqueInteger().getZExtValue();
|
|
assert(indexValid(Idx) && "Invalid structure index!");
|
|
return STy->getElementType(Idx);
|
|
}
|
|
|
|
return cast<SequentialType>(this)->getElementType();
|
|
}
|
|
|
|
Type *CompositeType::getTypeAtIndex(unsigned Idx) const{
|
|
if (auto *STy = dyn_cast<StructType>(this)) {
|
|
assert(indexValid(Idx) && "Invalid structure index!");
|
|
return STy->getElementType(Idx);
|
|
}
|
|
|
|
return cast<SequentialType>(this)->getElementType();
|
|
}
|
|
|
|
bool CompositeType::indexValid(const Value *V) const {
|
|
if (auto *STy = dyn_cast<StructType>(this)) {
|
|
// Structure indexes require (vectors of) 32-bit integer constants. In the
|
|
// vector case all of the indices must be equal.
|
|
if (!V->getType()->getScalarType()->isIntegerTy(32))
|
|
return false;
|
|
const Constant *C = dyn_cast<Constant>(V);
|
|
if (C && V->getType()->isVectorTy())
|
|
C = C->getSplatValue();
|
|
const ConstantInt *CU = dyn_cast_or_null<ConstantInt>(C);
|
|
return CU && CU->getZExtValue() < STy->getNumElements();
|
|
}
|
|
|
|
// Sequential types can be indexed by any integer.
|
|
return V->getType()->isIntOrIntVectorTy();
|
|
}
|
|
|
|
bool CompositeType::indexValid(unsigned Idx) const {
|
|
if (auto *STy = dyn_cast<StructType>(this))
|
|
return Idx < STy->getNumElements();
|
|
// Sequential types can be indexed by any integer.
|
|
return true;
|
|
}
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
// ArrayType Implementation
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
ArrayType::ArrayType(Type *ElType, uint64_t NumEl)
|
|
: SequentialType(ArrayTyID, ElType, NumEl) {}
|
|
|
|
ArrayType *ArrayType::get(Type *ElementType, uint64_t NumElements) {
|
|
assert(isValidElementType(ElementType) && "Invalid type for array element!");
|
|
|
|
LLVMContextImpl *pImpl = ElementType->getContext().pImpl;
|
|
ArrayType *&Entry =
|
|
pImpl->ArrayTypes[std::make_pair(ElementType, NumElements)];
|
|
|
|
if (!Entry)
|
|
Entry = new (pImpl->TypeAllocator) ArrayType(ElementType, NumElements);
|
|
return Entry;
|
|
}
|
|
|
|
bool ArrayType::isValidElementType(Type *ElemTy) {
|
|
return !ElemTy->isVoidTy() && !ElemTy->isLabelTy() &&
|
|
!ElemTy->isMetadataTy() && !ElemTy->isFunctionTy() &&
|
|
!ElemTy->isTokenTy();
|
|
}
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
// VectorType Implementation
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
VectorType::VectorType(Type *ElType, unsigned NumEl)
|
|
: SequentialType(VectorTyID, ElType, NumEl) {}
|
|
|
|
VectorType *VectorType::get(Type *ElementType, unsigned NumElements) {
|
|
assert(NumElements > 0 && "#Elements of a VectorType must be greater than 0");
|
|
assert(isValidElementType(ElementType) && "Element type of a VectorType must "
|
|
"be an integer, floating point, or "
|
|
"pointer type.");
|
|
|
|
LLVMContextImpl *pImpl = ElementType->getContext().pImpl;
|
|
VectorType *&Entry = ElementType->getContext().pImpl
|
|
->VectorTypes[std::make_pair(ElementType, NumElements)];
|
|
|
|
if (!Entry)
|
|
Entry = new (pImpl->TypeAllocator) VectorType(ElementType, NumElements);
|
|
return Entry;
|
|
}
|
|
|
|
bool VectorType::isValidElementType(Type *ElemTy) {
|
|
return ElemTy->isIntegerTy() || ElemTy->isFloatingPointTy() ||
|
|
ElemTy->isPointerTy();
|
|
}
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
// PointerType Implementation
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
PointerType *PointerType::get(Type *EltTy, unsigned AddressSpace) {
|
|
assert(EltTy && "Can't get a pointer to <null> type!");
|
|
assert(isValidElementType(EltTy) && "Invalid type for pointer element!");
|
|
|
|
LLVMContextImpl *CImpl = EltTy->getContext().pImpl;
|
|
|
|
// Since AddressSpace #0 is the common case, we special case it.
|
|
PointerType *&Entry = AddressSpace == 0 ? CImpl->PointerTypes[EltTy]
|
|
: CImpl->ASPointerTypes[std::make_pair(EltTy, AddressSpace)];
|
|
|
|
if (!Entry)
|
|
Entry = new (CImpl->TypeAllocator) PointerType(EltTy, AddressSpace);
|
|
return Entry;
|
|
}
|
|
|
|
PointerType::PointerType(Type *E, unsigned AddrSpace)
|
|
: Type(E->getContext(), PointerTyID), PointeeTy(E) {
|
|
ContainedTys = &PointeeTy;
|
|
NumContainedTys = 1;
|
|
setSubclassData(AddrSpace);
|
|
}
|
|
|
|
PointerType *Type::getPointerTo(unsigned addrs) const {
|
|
return PointerType::get(const_cast<Type*>(this), addrs);
|
|
}
|
|
|
|
bool PointerType::isValidElementType(Type *ElemTy) {
|
|
return !ElemTy->isVoidTy() && !ElemTy->isLabelTy() &&
|
|
!ElemTy->isMetadataTy() && !ElemTy->isTokenTy();
|
|
}
|
|
|
|
bool PointerType::isLoadableOrStorableType(Type *ElemTy) {
|
|
return isValidElementType(ElemTy) && !ElemTy->isFunctionTy();
|
|
}
|