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9de6bbe4af
Otherwise we'll discard the wrong half of a uint64_t on big-endian systems. llvm-svn: 230016
3036 lines
112 KiB
C++
3036 lines
112 KiB
C++
//===-- Constants.cpp - Implement Constant nodes --------------------------===//
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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 Constant* classes.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/IR/Constants.h"
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#include "ConstantFold.h"
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#include "LLVMContextImpl.h"
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#include "llvm/ADT/DenseMap.h"
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#include "llvm/ADT/FoldingSet.h"
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#include "llvm/ADT/STLExtras.h"
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#include "llvm/ADT/SmallVector.h"
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#include "llvm/ADT/StringExtras.h"
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#include "llvm/ADT/StringMap.h"
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#include "llvm/IR/DerivedTypes.h"
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#include "llvm/IR/GetElementPtrTypeIterator.h"
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#include "llvm/IR/GlobalValue.h"
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#include "llvm/IR/Instructions.h"
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#include "llvm/IR/Module.h"
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#include "llvm/IR/Operator.h"
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#include "llvm/Support/Compiler.h"
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#include "llvm/Support/Debug.h"
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#include "llvm/Support/ErrorHandling.h"
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#include "llvm/Support/ManagedStatic.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 <algorithm>
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#include <cstdarg>
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using namespace llvm;
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//===----------------------------------------------------------------------===//
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// Constant Class
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//===----------------------------------------------------------------------===//
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void Constant::anchor() { }
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bool Constant::isNegativeZeroValue() const {
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// Floating point values have an explicit -0.0 value.
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if (const ConstantFP *CFP = dyn_cast<ConstantFP>(this))
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return CFP->isZero() && CFP->isNegative();
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// Equivalent for a vector of -0.0's.
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if (const ConstantDataVector *CV = dyn_cast<ConstantDataVector>(this))
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if (ConstantFP *SplatCFP = dyn_cast_or_null<ConstantFP>(CV->getSplatValue()))
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if (SplatCFP && SplatCFP->isZero() && SplatCFP->isNegative())
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return true;
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// We've already handled true FP case; any other FP vectors can't represent -0.0.
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if (getType()->isFPOrFPVectorTy())
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return false;
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// Otherwise, just use +0.0.
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return isNullValue();
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}
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// Return true iff this constant is positive zero (floating point), negative
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// zero (floating point), or a null value.
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bool Constant::isZeroValue() const {
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// Floating point values have an explicit -0.0 value.
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if (const ConstantFP *CFP = dyn_cast<ConstantFP>(this))
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return CFP->isZero();
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// Otherwise, just use +0.0.
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return isNullValue();
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}
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bool Constant::isNullValue() const {
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// 0 is null.
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if (const ConstantInt *CI = dyn_cast<ConstantInt>(this))
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return CI->isZero();
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// +0.0 is null.
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if (const ConstantFP *CFP = dyn_cast<ConstantFP>(this))
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return CFP->isZero() && !CFP->isNegative();
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// constant zero is zero for aggregates and cpnull is null for pointers.
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return isa<ConstantAggregateZero>(this) || isa<ConstantPointerNull>(this);
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}
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bool Constant::isAllOnesValue() const {
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// Check for -1 integers
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if (const ConstantInt *CI = dyn_cast<ConstantInt>(this))
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return CI->isMinusOne();
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// Check for FP which are bitcasted from -1 integers
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if (const ConstantFP *CFP = dyn_cast<ConstantFP>(this))
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return CFP->getValueAPF().bitcastToAPInt().isAllOnesValue();
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// Check for constant vectors which are splats of -1 values.
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if (const ConstantVector *CV = dyn_cast<ConstantVector>(this))
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if (Constant *Splat = CV->getSplatValue())
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return Splat->isAllOnesValue();
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// Check for constant vectors which are splats of -1 values.
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if (const ConstantDataVector *CV = dyn_cast<ConstantDataVector>(this))
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if (Constant *Splat = CV->getSplatValue())
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return Splat->isAllOnesValue();
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return false;
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}
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bool Constant::isOneValue() const {
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// Check for 1 integers
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if (const ConstantInt *CI = dyn_cast<ConstantInt>(this))
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return CI->isOne();
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// Check for FP which are bitcasted from 1 integers
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if (const ConstantFP *CFP = dyn_cast<ConstantFP>(this))
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return CFP->getValueAPF().bitcastToAPInt() == 1;
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// Check for constant vectors which are splats of 1 values.
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if (const ConstantVector *CV = dyn_cast<ConstantVector>(this))
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if (Constant *Splat = CV->getSplatValue())
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return Splat->isOneValue();
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// Check for constant vectors which are splats of 1 values.
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if (const ConstantDataVector *CV = dyn_cast<ConstantDataVector>(this))
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if (Constant *Splat = CV->getSplatValue())
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return Splat->isOneValue();
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return false;
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}
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bool Constant::isMinSignedValue() const {
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// Check for INT_MIN integers
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if (const ConstantInt *CI = dyn_cast<ConstantInt>(this))
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return CI->isMinValue(/*isSigned=*/true);
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// Check for FP which are bitcasted from INT_MIN integers
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if (const ConstantFP *CFP = dyn_cast<ConstantFP>(this))
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return CFP->getValueAPF().bitcastToAPInt().isMinSignedValue();
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// Check for constant vectors which are splats of INT_MIN values.
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if (const ConstantVector *CV = dyn_cast<ConstantVector>(this))
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if (Constant *Splat = CV->getSplatValue())
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return Splat->isMinSignedValue();
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// Check for constant vectors which are splats of INT_MIN values.
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if (const ConstantDataVector *CV = dyn_cast<ConstantDataVector>(this))
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if (Constant *Splat = CV->getSplatValue())
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return Splat->isMinSignedValue();
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return false;
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}
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bool Constant::isNotMinSignedValue() const {
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// Check for INT_MIN integers
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if (const ConstantInt *CI = dyn_cast<ConstantInt>(this))
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return !CI->isMinValue(/*isSigned=*/true);
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// Check for FP which are bitcasted from INT_MIN integers
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if (const ConstantFP *CFP = dyn_cast<ConstantFP>(this))
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return !CFP->getValueAPF().bitcastToAPInt().isMinSignedValue();
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// Check for constant vectors which are splats of INT_MIN values.
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if (const ConstantVector *CV = dyn_cast<ConstantVector>(this))
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if (Constant *Splat = CV->getSplatValue())
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return Splat->isNotMinSignedValue();
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// Check for constant vectors which are splats of INT_MIN values.
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if (const ConstantDataVector *CV = dyn_cast<ConstantDataVector>(this))
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if (Constant *Splat = CV->getSplatValue())
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return Splat->isNotMinSignedValue();
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// It *may* contain INT_MIN, we can't tell.
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return false;
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}
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// Constructor to create a '0' constant of arbitrary type...
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Constant *Constant::getNullValue(Type *Ty) {
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switch (Ty->getTypeID()) {
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case Type::IntegerTyID:
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return ConstantInt::get(Ty, 0);
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case Type::HalfTyID:
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return ConstantFP::get(Ty->getContext(),
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APFloat::getZero(APFloat::IEEEhalf));
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case Type::FloatTyID:
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return ConstantFP::get(Ty->getContext(),
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APFloat::getZero(APFloat::IEEEsingle));
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case Type::DoubleTyID:
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return ConstantFP::get(Ty->getContext(),
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APFloat::getZero(APFloat::IEEEdouble));
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case Type::X86_FP80TyID:
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return ConstantFP::get(Ty->getContext(),
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APFloat::getZero(APFloat::x87DoubleExtended));
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case Type::FP128TyID:
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return ConstantFP::get(Ty->getContext(),
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APFloat::getZero(APFloat::IEEEquad));
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case Type::PPC_FP128TyID:
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return ConstantFP::get(Ty->getContext(),
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APFloat(APFloat::PPCDoubleDouble,
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APInt::getNullValue(128)));
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case Type::PointerTyID:
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return ConstantPointerNull::get(cast<PointerType>(Ty));
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case Type::StructTyID:
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case Type::ArrayTyID:
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case Type::VectorTyID:
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return ConstantAggregateZero::get(Ty);
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default:
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// Function, Label, or Opaque type?
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llvm_unreachable("Cannot create a null constant of that type!");
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}
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}
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Constant *Constant::getIntegerValue(Type *Ty, const APInt &V) {
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Type *ScalarTy = Ty->getScalarType();
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// Create the base integer constant.
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Constant *C = ConstantInt::get(Ty->getContext(), V);
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// Convert an integer to a pointer, if necessary.
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if (PointerType *PTy = dyn_cast<PointerType>(ScalarTy))
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C = ConstantExpr::getIntToPtr(C, PTy);
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// Broadcast a scalar to a vector, if necessary.
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if (VectorType *VTy = dyn_cast<VectorType>(Ty))
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C = ConstantVector::getSplat(VTy->getNumElements(), C);
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return C;
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}
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Constant *Constant::getAllOnesValue(Type *Ty) {
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if (IntegerType *ITy = dyn_cast<IntegerType>(Ty))
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return ConstantInt::get(Ty->getContext(),
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APInt::getAllOnesValue(ITy->getBitWidth()));
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if (Ty->isFloatingPointTy()) {
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APFloat FL = APFloat::getAllOnesValue(Ty->getPrimitiveSizeInBits(),
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!Ty->isPPC_FP128Ty());
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return ConstantFP::get(Ty->getContext(), FL);
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}
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VectorType *VTy = cast<VectorType>(Ty);
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return ConstantVector::getSplat(VTy->getNumElements(),
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getAllOnesValue(VTy->getElementType()));
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}
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/// getAggregateElement - For aggregates (struct/array/vector) return the
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/// constant that corresponds to the specified element if possible, or null if
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/// not. This can return null if the element index is a ConstantExpr, or if
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/// 'this' is a constant expr.
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Constant *Constant::getAggregateElement(unsigned Elt) const {
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if (const ConstantStruct *CS = dyn_cast<ConstantStruct>(this))
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return Elt < CS->getNumOperands() ? CS->getOperand(Elt) : nullptr;
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if (const ConstantArray *CA = dyn_cast<ConstantArray>(this))
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return Elt < CA->getNumOperands() ? CA->getOperand(Elt) : nullptr;
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if (const ConstantVector *CV = dyn_cast<ConstantVector>(this))
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return Elt < CV->getNumOperands() ? CV->getOperand(Elt) : nullptr;
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if (const ConstantAggregateZero *CAZ = dyn_cast<ConstantAggregateZero>(this))
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return Elt < CAZ->getNumElements() ? CAZ->getElementValue(Elt) : nullptr;
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if (const UndefValue *UV = dyn_cast<UndefValue>(this))
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return Elt < UV->getNumElements() ? UV->getElementValue(Elt) : nullptr;
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if (const ConstantDataSequential *CDS =dyn_cast<ConstantDataSequential>(this))
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return Elt < CDS->getNumElements() ? CDS->getElementAsConstant(Elt)
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: nullptr;
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return nullptr;
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}
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Constant *Constant::getAggregateElement(Constant *Elt) const {
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assert(isa<IntegerType>(Elt->getType()) && "Index must be an integer");
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if (ConstantInt *CI = dyn_cast<ConstantInt>(Elt))
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return getAggregateElement(CI->getZExtValue());
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return nullptr;
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}
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void Constant::destroyConstantImpl() {
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// When a Constant is destroyed, there may be lingering
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// references to the constant by other constants in the constant pool. These
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// constants are implicitly dependent on the module that is being deleted,
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// but they don't know that. Because we only find out when the CPV is
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// deleted, we must now notify all of our users (that should only be
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// Constants) that they are, in fact, invalid now and should be deleted.
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//
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while (!use_empty()) {
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Value *V = user_back();
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#ifndef NDEBUG // Only in -g mode...
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if (!isa<Constant>(V)) {
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dbgs() << "While deleting: " << *this
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<< "\n\nUse still stuck around after Def is destroyed: "
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<< *V << "\n\n";
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}
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#endif
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assert(isa<Constant>(V) && "References remain to Constant being destroyed");
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cast<Constant>(V)->destroyConstant();
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// The constant should remove itself from our use list...
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assert((use_empty() || user_back() != V) && "Constant not removed!");
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}
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// Value has no outstanding references it is safe to delete it now...
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delete this;
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}
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static bool canTrapImpl(const Constant *C,
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SmallPtrSetImpl<const ConstantExpr *> &NonTrappingOps) {
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assert(C->getType()->isFirstClassType() && "Cannot evaluate aggregate vals!");
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// The only thing that could possibly trap are constant exprs.
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const ConstantExpr *CE = dyn_cast<ConstantExpr>(C);
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if (!CE)
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return false;
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// ConstantExpr traps if any operands can trap.
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for (unsigned i = 0, e = C->getNumOperands(); i != e; ++i) {
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if (ConstantExpr *Op = dyn_cast<ConstantExpr>(CE->getOperand(i))) {
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if (NonTrappingOps.insert(Op).second && canTrapImpl(Op, NonTrappingOps))
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return true;
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}
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}
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// Otherwise, only specific operations can trap.
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switch (CE->getOpcode()) {
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default:
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return false;
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case Instruction::UDiv:
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case Instruction::SDiv:
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case Instruction::FDiv:
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case Instruction::URem:
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case Instruction::SRem:
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case Instruction::FRem:
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// Div and rem can trap if the RHS is not known to be non-zero.
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if (!isa<ConstantInt>(CE->getOperand(1)) ||CE->getOperand(1)->isNullValue())
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return true;
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return false;
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}
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}
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/// canTrap - Return true if evaluation of this constant could trap. This is
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/// true for things like constant expressions that could divide by zero.
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bool Constant::canTrap() const {
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SmallPtrSet<const ConstantExpr *, 4> NonTrappingOps;
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return canTrapImpl(this, NonTrappingOps);
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}
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/// Check if C contains a GlobalValue for which Predicate is true.
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static bool
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ConstHasGlobalValuePredicate(const Constant *C,
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bool (*Predicate)(const GlobalValue *)) {
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SmallPtrSet<const Constant *, 8> Visited;
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SmallVector<const Constant *, 8> WorkList;
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WorkList.push_back(C);
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Visited.insert(C);
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while (!WorkList.empty()) {
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const Constant *WorkItem = WorkList.pop_back_val();
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if (const auto *GV = dyn_cast<GlobalValue>(WorkItem))
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if (Predicate(GV))
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return true;
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for (const Value *Op : WorkItem->operands()) {
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const Constant *ConstOp = dyn_cast<Constant>(Op);
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if (!ConstOp)
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continue;
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if (Visited.insert(ConstOp).second)
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WorkList.push_back(ConstOp);
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}
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}
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return false;
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}
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/// Return true if the value can vary between threads.
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bool Constant::isThreadDependent() const {
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auto DLLImportPredicate = [](const GlobalValue *GV) {
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return GV->isThreadLocal();
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};
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return ConstHasGlobalValuePredicate(this, DLLImportPredicate);
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}
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bool Constant::isDLLImportDependent() const {
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auto DLLImportPredicate = [](const GlobalValue *GV) {
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return GV->hasDLLImportStorageClass();
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};
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return ConstHasGlobalValuePredicate(this, DLLImportPredicate);
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}
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/// Return true if the constant has users other than constant exprs and other
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/// dangling things.
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bool Constant::isConstantUsed() const {
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for (const User *U : users()) {
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const Constant *UC = dyn_cast<Constant>(U);
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if (!UC || isa<GlobalValue>(UC))
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return true;
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if (UC->isConstantUsed())
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return true;
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}
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return false;
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}
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/// getRelocationInfo - This method classifies the entry according to
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/// whether or not it may generate a relocation entry. This must be
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/// conservative, so if it might codegen to a relocatable entry, it should say
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/// so. The return values are:
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///
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/// NoRelocation: This constant pool entry is guaranteed to never have a
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/// relocation applied to it (because it holds a simple constant like
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/// '4').
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/// LocalRelocation: This entry has relocations, but the entries are
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/// guaranteed to be resolvable by the static linker, so the dynamic
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/// linker will never see them.
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/// GlobalRelocations: This entry may have arbitrary relocations.
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///
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/// FIXME: This really should not be in IR.
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Constant::PossibleRelocationsTy Constant::getRelocationInfo() const {
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if (const GlobalValue *GV = dyn_cast<GlobalValue>(this)) {
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if (GV->hasLocalLinkage() || GV->hasHiddenVisibility())
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return LocalRelocation; // Local to this file/library.
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return GlobalRelocations; // Global reference.
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}
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if (const BlockAddress *BA = dyn_cast<BlockAddress>(this))
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return BA->getFunction()->getRelocationInfo();
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// While raw uses of blockaddress need to be relocated, differences between
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// two of them don't when they are for labels in the same function. This is a
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// common idiom when creating a table for the indirect goto extension, so we
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// handle it efficiently here.
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if (const ConstantExpr *CE = dyn_cast<ConstantExpr>(this))
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if (CE->getOpcode() == Instruction::Sub) {
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ConstantExpr *LHS = dyn_cast<ConstantExpr>(CE->getOperand(0));
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ConstantExpr *RHS = dyn_cast<ConstantExpr>(CE->getOperand(1));
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if (LHS && RHS &&
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LHS->getOpcode() == Instruction::PtrToInt &&
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RHS->getOpcode() == Instruction::PtrToInt &&
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isa<BlockAddress>(LHS->getOperand(0)) &&
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isa<BlockAddress>(RHS->getOperand(0)) &&
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cast<BlockAddress>(LHS->getOperand(0))->getFunction() ==
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cast<BlockAddress>(RHS->getOperand(0))->getFunction())
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return NoRelocation;
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}
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PossibleRelocationsTy Result = NoRelocation;
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for (unsigned i = 0, e = getNumOperands(); i != e; ++i)
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Result = std::max(Result,
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cast<Constant>(getOperand(i))->getRelocationInfo());
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return Result;
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}
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/// removeDeadUsersOfConstant - If the specified constantexpr is dead, remove
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/// it. This involves recursively eliminating any dead users of the
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/// constantexpr.
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static bool removeDeadUsersOfConstant(const Constant *C) {
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if (isa<GlobalValue>(C)) return false; // Cannot remove this
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while (!C->use_empty()) {
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const Constant *User = dyn_cast<Constant>(C->user_back());
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if (!User) return false; // Non-constant usage;
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if (!removeDeadUsersOfConstant(User))
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return false; // Constant wasn't dead
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}
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const_cast<Constant*>(C)->destroyConstant();
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return true;
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}
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/// removeDeadConstantUsers - If there are any dead constant users dangling
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/// off of this constant, remove them. This method is useful for clients
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/// that want to check to see if a global is unused, but don't want to deal
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/// with potentially dead constants hanging off of the globals.
|
|
void Constant::removeDeadConstantUsers() const {
|
|
Value::const_user_iterator I = user_begin(), E = user_end();
|
|
Value::const_user_iterator LastNonDeadUser = E;
|
|
while (I != E) {
|
|
const Constant *User = dyn_cast<Constant>(*I);
|
|
if (!User) {
|
|
LastNonDeadUser = I;
|
|
++I;
|
|
continue;
|
|
}
|
|
|
|
if (!removeDeadUsersOfConstant(User)) {
|
|
// If the constant wasn't dead, remember that this was the last live use
|
|
// and move on to the next constant.
|
|
LastNonDeadUser = I;
|
|
++I;
|
|
continue;
|
|
}
|
|
|
|
// If the constant was dead, then the iterator is invalidated.
|
|
if (LastNonDeadUser == E) {
|
|
I = user_begin();
|
|
if (I == E) break;
|
|
} else {
|
|
I = LastNonDeadUser;
|
|
++I;
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
// ConstantInt
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
void ConstantInt::anchor() { }
|
|
|
|
ConstantInt::ConstantInt(IntegerType *Ty, const APInt& V)
|
|
: Constant(Ty, ConstantIntVal, nullptr, 0), Val(V) {
|
|
assert(V.getBitWidth() == Ty->getBitWidth() && "Invalid constant for type");
|
|
}
|
|
|
|
ConstantInt *ConstantInt::getTrue(LLVMContext &Context) {
|
|
LLVMContextImpl *pImpl = Context.pImpl;
|
|
if (!pImpl->TheTrueVal)
|
|
pImpl->TheTrueVal = ConstantInt::get(Type::getInt1Ty(Context), 1);
|
|
return pImpl->TheTrueVal;
|
|
}
|
|
|
|
ConstantInt *ConstantInt::getFalse(LLVMContext &Context) {
|
|
LLVMContextImpl *pImpl = Context.pImpl;
|
|
if (!pImpl->TheFalseVal)
|
|
pImpl->TheFalseVal = ConstantInt::get(Type::getInt1Ty(Context), 0);
|
|
return pImpl->TheFalseVal;
|
|
}
|
|
|
|
Constant *ConstantInt::getTrue(Type *Ty) {
|
|
VectorType *VTy = dyn_cast<VectorType>(Ty);
|
|
if (!VTy) {
|
|
assert(Ty->isIntegerTy(1) && "True must be i1 or vector of i1.");
|
|
return ConstantInt::getTrue(Ty->getContext());
|
|
}
|
|
assert(VTy->getElementType()->isIntegerTy(1) &&
|
|
"True must be vector of i1 or i1.");
|
|
return ConstantVector::getSplat(VTy->getNumElements(),
|
|
ConstantInt::getTrue(Ty->getContext()));
|
|
}
|
|
|
|
Constant *ConstantInt::getFalse(Type *Ty) {
|
|
VectorType *VTy = dyn_cast<VectorType>(Ty);
|
|
if (!VTy) {
|
|
assert(Ty->isIntegerTy(1) && "False must be i1 or vector of i1.");
|
|
return ConstantInt::getFalse(Ty->getContext());
|
|
}
|
|
assert(VTy->getElementType()->isIntegerTy(1) &&
|
|
"False must be vector of i1 or i1.");
|
|
return ConstantVector::getSplat(VTy->getNumElements(),
|
|
ConstantInt::getFalse(Ty->getContext()));
|
|
}
|
|
|
|
// Get a ConstantInt from an APInt.
|
|
ConstantInt *ConstantInt::get(LLVMContext &Context, const APInt &V) {
|
|
// get an existing value or the insertion position
|
|
LLVMContextImpl *pImpl = Context.pImpl;
|
|
ConstantInt *&Slot = pImpl->IntConstants[V];
|
|
if (!Slot) {
|
|
// Get the corresponding integer type for the bit width of the value.
|
|
IntegerType *ITy = IntegerType::get(Context, V.getBitWidth());
|
|
Slot = new ConstantInt(ITy, V);
|
|
}
|
|
assert(Slot->getType() == IntegerType::get(Context, V.getBitWidth()));
|
|
return Slot;
|
|
}
|
|
|
|
Constant *ConstantInt::get(Type *Ty, uint64_t V, bool isSigned) {
|
|
Constant *C = get(cast<IntegerType>(Ty->getScalarType()), V, isSigned);
|
|
|
|
// For vectors, broadcast the value.
|
|
if (VectorType *VTy = dyn_cast<VectorType>(Ty))
|
|
return ConstantVector::getSplat(VTy->getNumElements(), C);
|
|
|
|
return C;
|
|
}
|
|
|
|
ConstantInt *ConstantInt::get(IntegerType *Ty, uint64_t V,
|
|
bool isSigned) {
|
|
return get(Ty->getContext(), APInt(Ty->getBitWidth(), V, isSigned));
|
|
}
|
|
|
|
ConstantInt *ConstantInt::getSigned(IntegerType *Ty, int64_t V) {
|
|
return get(Ty, V, true);
|
|
}
|
|
|
|
Constant *ConstantInt::getSigned(Type *Ty, int64_t V) {
|
|
return get(Ty, V, true);
|
|
}
|
|
|
|
Constant *ConstantInt::get(Type *Ty, const APInt& V) {
|
|
ConstantInt *C = get(Ty->getContext(), V);
|
|
assert(C->getType() == Ty->getScalarType() &&
|
|
"ConstantInt type doesn't match the type implied by its value!");
|
|
|
|
// For vectors, broadcast the value.
|
|
if (VectorType *VTy = dyn_cast<VectorType>(Ty))
|
|
return ConstantVector::getSplat(VTy->getNumElements(), C);
|
|
|
|
return C;
|
|
}
|
|
|
|
ConstantInt *ConstantInt::get(IntegerType* Ty, StringRef Str,
|
|
uint8_t radix) {
|
|
return get(Ty->getContext(), APInt(Ty->getBitWidth(), Str, radix));
|
|
}
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
// ConstantFP
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
static const fltSemantics *TypeToFloatSemantics(Type *Ty) {
|
|
if (Ty->isHalfTy())
|
|
return &APFloat::IEEEhalf;
|
|
if (Ty->isFloatTy())
|
|
return &APFloat::IEEEsingle;
|
|
if (Ty->isDoubleTy())
|
|
return &APFloat::IEEEdouble;
|
|
if (Ty->isX86_FP80Ty())
|
|
return &APFloat::x87DoubleExtended;
|
|
else if (Ty->isFP128Ty())
|
|
return &APFloat::IEEEquad;
|
|
|
|
assert(Ty->isPPC_FP128Ty() && "Unknown FP format");
|
|
return &APFloat::PPCDoubleDouble;
|
|
}
|
|
|
|
void ConstantFP::anchor() { }
|
|
|
|
/// get() - This returns a constant fp for the specified value in the
|
|
/// specified type. This should only be used for simple constant values like
|
|
/// 2.0/1.0 etc, that are known-valid both as double and as the target format.
|
|
Constant *ConstantFP::get(Type *Ty, double V) {
|
|
LLVMContext &Context = Ty->getContext();
|
|
|
|
APFloat FV(V);
|
|
bool ignored;
|
|
FV.convert(*TypeToFloatSemantics(Ty->getScalarType()),
|
|
APFloat::rmNearestTiesToEven, &ignored);
|
|
Constant *C = get(Context, FV);
|
|
|
|
// For vectors, broadcast the value.
|
|
if (VectorType *VTy = dyn_cast<VectorType>(Ty))
|
|
return ConstantVector::getSplat(VTy->getNumElements(), C);
|
|
|
|
return C;
|
|
}
|
|
|
|
|
|
Constant *ConstantFP::get(Type *Ty, StringRef Str) {
|
|
LLVMContext &Context = Ty->getContext();
|
|
|
|
APFloat FV(*TypeToFloatSemantics(Ty->getScalarType()), Str);
|
|
Constant *C = get(Context, FV);
|
|
|
|
// For vectors, broadcast the value.
|
|
if (VectorType *VTy = dyn_cast<VectorType>(Ty))
|
|
return ConstantVector::getSplat(VTy->getNumElements(), C);
|
|
|
|
return C;
|
|
}
|
|
|
|
Constant *ConstantFP::getNegativeZero(Type *Ty) {
|
|
const fltSemantics &Semantics = *TypeToFloatSemantics(Ty->getScalarType());
|
|
APFloat NegZero = APFloat::getZero(Semantics, /*Negative=*/true);
|
|
Constant *C = get(Ty->getContext(), NegZero);
|
|
|
|
if (VectorType *VTy = dyn_cast<VectorType>(Ty))
|
|
return ConstantVector::getSplat(VTy->getNumElements(), C);
|
|
|
|
return C;
|
|
}
|
|
|
|
|
|
Constant *ConstantFP::getZeroValueForNegation(Type *Ty) {
|
|
if (Ty->isFPOrFPVectorTy())
|
|
return getNegativeZero(Ty);
|
|
|
|
return Constant::getNullValue(Ty);
|
|
}
|
|
|
|
|
|
// ConstantFP accessors.
|
|
ConstantFP* ConstantFP::get(LLVMContext &Context, const APFloat& V) {
|
|
LLVMContextImpl* pImpl = Context.pImpl;
|
|
|
|
ConstantFP *&Slot = pImpl->FPConstants[V];
|
|
|
|
if (!Slot) {
|
|
Type *Ty;
|
|
if (&V.getSemantics() == &APFloat::IEEEhalf)
|
|
Ty = Type::getHalfTy(Context);
|
|
else if (&V.getSemantics() == &APFloat::IEEEsingle)
|
|
Ty = Type::getFloatTy(Context);
|
|
else if (&V.getSemantics() == &APFloat::IEEEdouble)
|
|
Ty = Type::getDoubleTy(Context);
|
|
else if (&V.getSemantics() == &APFloat::x87DoubleExtended)
|
|
Ty = Type::getX86_FP80Ty(Context);
|
|
else if (&V.getSemantics() == &APFloat::IEEEquad)
|
|
Ty = Type::getFP128Ty(Context);
|
|
else {
|
|
assert(&V.getSemantics() == &APFloat::PPCDoubleDouble &&
|
|
"Unknown FP format");
|
|
Ty = Type::getPPC_FP128Ty(Context);
|
|
}
|
|
Slot = new ConstantFP(Ty, V);
|
|
}
|
|
|
|
return Slot;
|
|
}
|
|
|
|
Constant *ConstantFP::getInfinity(Type *Ty, bool Negative) {
|
|
const fltSemantics &Semantics = *TypeToFloatSemantics(Ty->getScalarType());
|
|
Constant *C = get(Ty->getContext(), APFloat::getInf(Semantics, Negative));
|
|
|
|
if (VectorType *VTy = dyn_cast<VectorType>(Ty))
|
|
return ConstantVector::getSplat(VTy->getNumElements(), C);
|
|
|
|
return C;
|
|
}
|
|
|
|
ConstantFP::ConstantFP(Type *Ty, const APFloat& V)
|
|
: Constant(Ty, ConstantFPVal, nullptr, 0), Val(V) {
|
|
assert(&V.getSemantics() == TypeToFloatSemantics(Ty) &&
|
|
"FP type Mismatch");
|
|
}
|
|
|
|
bool ConstantFP::isExactlyValue(const APFloat &V) const {
|
|
return Val.bitwiseIsEqual(V);
|
|
}
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
// ConstantAggregateZero Implementation
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
/// getSequentialElement - If this CAZ has array or vector type, return a zero
|
|
/// with the right element type.
|
|
Constant *ConstantAggregateZero::getSequentialElement() const {
|
|
return Constant::getNullValue(getType()->getSequentialElementType());
|
|
}
|
|
|
|
/// getStructElement - If this CAZ has struct type, return a zero with the
|
|
/// right element type for the specified element.
|
|
Constant *ConstantAggregateZero::getStructElement(unsigned Elt) const {
|
|
return Constant::getNullValue(getType()->getStructElementType(Elt));
|
|
}
|
|
|
|
/// getElementValue - Return a zero of the right value for the specified GEP
|
|
/// index if we can, otherwise return null (e.g. if C is a ConstantExpr).
|
|
Constant *ConstantAggregateZero::getElementValue(Constant *C) const {
|
|
if (isa<SequentialType>(getType()))
|
|
return getSequentialElement();
|
|
return getStructElement(cast<ConstantInt>(C)->getZExtValue());
|
|
}
|
|
|
|
/// getElementValue - Return a zero of the right value for the specified GEP
|
|
/// index.
|
|
Constant *ConstantAggregateZero::getElementValue(unsigned Idx) const {
|
|
if (isa<SequentialType>(getType()))
|
|
return getSequentialElement();
|
|
return getStructElement(Idx);
|
|
}
|
|
|
|
unsigned ConstantAggregateZero::getNumElements() const {
|
|
const Type *Ty = getType();
|
|
if (const auto *AT = dyn_cast<ArrayType>(Ty))
|
|
return AT->getNumElements();
|
|
if (const auto *VT = dyn_cast<VectorType>(Ty))
|
|
return VT->getNumElements();
|
|
return Ty->getStructNumElements();
|
|
}
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
// UndefValue Implementation
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
/// getSequentialElement - If this undef has array or vector type, return an
|
|
/// undef with the right element type.
|
|
UndefValue *UndefValue::getSequentialElement() const {
|
|
return UndefValue::get(getType()->getSequentialElementType());
|
|
}
|
|
|
|
/// getStructElement - If this undef has struct type, return a zero with the
|
|
/// right element type for the specified element.
|
|
UndefValue *UndefValue::getStructElement(unsigned Elt) const {
|
|
return UndefValue::get(getType()->getStructElementType(Elt));
|
|
}
|
|
|
|
/// getElementValue - Return an undef of the right value for the specified GEP
|
|
/// index if we can, otherwise return null (e.g. if C is a ConstantExpr).
|
|
UndefValue *UndefValue::getElementValue(Constant *C) const {
|
|
if (isa<SequentialType>(getType()))
|
|
return getSequentialElement();
|
|
return getStructElement(cast<ConstantInt>(C)->getZExtValue());
|
|
}
|
|
|
|
/// getElementValue - Return an undef of the right value for the specified GEP
|
|
/// index.
|
|
UndefValue *UndefValue::getElementValue(unsigned Idx) const {
|
|
if (isa<SequentialType>(getType()))
|
|
return getSequentialElement();
|
|
return getStructElement(Idx);
|
|
}
|
|
|
|
unsigned UndefValue::getNumElements() const {
|
|
const Type *Ty = getType();
|
|
if (const auto *AT = dyn_cast<ArrayType>(Ty))
|
|
return AT->getNumElements();
|
|
if (const auto *VT = dyn_cast<VectorType>(Ty))
|
|
return VT->getNumElements();
|
|
return Ty->getStructNumElements();
|
|
}
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
// ConstantXXX Classes
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
template <typename ItTy, typename EltTy>
|
|
static bool rangeOnlyContains(ItTy Start, ItTy End, EltTy Elt) {
|
|
for (; Start != End; ++Start)
|
|
if (*Start != Elt)
|
|
return false;
|
|
return true;
|
|
}
|
|
|
|
ConstantArray::ConstantArray(ArrayType *T, ArrayRef<Constant *> V)
|
|
: Constant(T, ConstantArrayVal,
|
|
OperandTraits<ConstantArray>::op_end(this) - V.size(),
|
|
V.size()) {
|
|
assert(V.size() == T->getNumElements() &&
|
|
"Invalid initializer vector for constant array");
|
|
for (unsigned i = 0, e = V.size(); i != e; ++i)
|
|
assert(V[i]->getType() == T->getElementType() &&
|
|
"Initializer for array element doesn't match array element type!");
|
|
std::copy(V.begin(), V.end(), op_begin());
|
|
}
|
|
|
|
Constant *ConstantArray::get(ArrayType *Ty, ArrayRef<Constant*> V) {
|
|
if (Constant *C = getImpl(Ty, V))
|
|
return C;
|
|
return Ty->getContext().pImpl->ArrayConstants.getOrCreate(Ty, V);
|
|
}
|
|
Constant *ConstantArray::getImpl(ArrayType *Ty, ArrayRef<Constant*> V) {
|
|
// Empty arrays are canonicalized to ConstantAggregateZero.
|
|
if (V.empty())
|
|
return ConstantAggregateZero::get(Ty);
|
|
|
|
for (unsigned i = 0, e = V.size(); i != e; ++i) {
|
|
assert(V[i]->getType() == Ty->getElementType() &&
|
|
"Wrong type in array element initializer");
|
|
}
|
|
|
|
// If this is an all-zero array, return a ConstantAggregateZero object. If
|
|
// all undef, return an UndefValue, if "all simple", then return a
|
|
// ConstantDataArray.
|
|
Constant *C = V[0];
|
|
if (isa<UndefValue>(C) && rangeOnlyContains(V.begin(), V.end(), C))
|
|
return UndefValue::get(Ty);
|
|
|
|
if (C->isNullValue() && rangeOnlyContains(V.begin(), V.end(), C))
|
|
return ConstantAggregateZero::get(Ty);
|
|
|
|
// Check to see if all of the elements are ConstantFP or ConstantInt and if
|
|
// the element type is compatible with ConstantDataVector. If so, use it.
|
|
if (ConstantDataSequential::isElementTypeCompatible(C->getType())) {
|
|
// We speculatively build the elements here even if it turns out that there
|
|
// is a constantexpr or something else weird in the array, since it is so
|
|
// uncommon for that to happen.
|
|
if (ConstantInt *CI = dyn_cast<ConstantInt>(C)) {
|
|
if (CI->getType()->isIntegerTy(8)) {
|
|
SmallVector<uint8_t, 16> Elts;
|
|
for (unsigned i = 0, e = V.size(); i != e; ++i)
|
|
if (ConstantInt *CI = dyn_cast<ConstantInt>(V[i]))
|
|
Elts.push_back(CI->getZExtValue());
|
|
else
|
|
break;
|
|
if (Elts.size() == V.size())
|
|
return ConstantDataArray::get(C->getContext(), Elts);
|
|
} else if (CI->getType()->isIntegerTy(16)) {
|
|
SmallVector<uint16_t, 16> Elts;
|
|
for (unsigned i = 0, e = V.size(); i != e; ++i)
|
|
if (ConstantInt *CI = dyn_cast<ConstantInt>(V[i]))
|
|
Elts.push_back(CI->getZExtValue());
|
|
else
|
|
break;
|
|
if (Elts.size() == V.size())
|
|
return ConstantDataArray::get(C->getContext(), Elts);
|
|
} else if (CI->getType()->isIntegerTy(32)) {
|
|
SmallVector<uint32_t, 16> Elts;
|
|
for (unsigned i = 0, e = V.size(); i != e; ++i)
|
|
if (ConstantInt *CI = dyn_cast<ConstantInt>(V[i]))
|
|
Elts.push_back(CI->getZExtValue());
|
|
else
|
|
break;
|
|
if (Elts.size() == V.size())
|
|
return ConstantDataArray::get(C->getContext(), Elts);
|
|
} else if (CI->getType()->isIntegerTy(64)) {
|
|
SmallVector<uint64_t, 16> Elts;
|
|
for (unsigned i = 0, e = V.size(); i != e; ++i)
|
|
if (ConstantInt *CI = dyn_cast<ConstantInt>(V[i]))
|
|
Elts.push_back(CI->getZExtValue());
|
|
else
|
|
break;
|
|
if (Elts.size() == V.size())
|
|
return ConstantDataArray::get(C->getContext(), Elts);
|
|
}
|
|
}
|
|
|
|
if (ConstantFP *CFP = dyn_cast<ConstantFP>(C)) {
|
|
if (CFP->getType()->isFloatTy()) {
|
|
SmallVector<uint32_t, 16> Elts;
|
|
for (unsigned i = 0, e = V.size(); i != e; ++i)
|
|
if (ConstantFP *CFP = dyn_cast<ConstantFP>(V[i]))
|
|
Elts.push_back(
|
|
CFP->getValueAPF().bitcastToAPInt().getLimitedValue());
|
|
else
|
|
break;
|
|
if (Elts.size() == V.size())
|
|
return ConstantDataArray::getFP(C->getContext(), Elts);
|
|
} else if (CFP->getType()->isDoubleTy()) {
|
|
SmallVector<uint64_t, 16> Elts;
|
|
for (unsigned i = 0, e = V.size(); i != e; ++i)
|
|
if (ConstantFP *CFP = dyn_cast<ConstantFP>(V[i]))
|
|
Elts.push_back(
|
|
CFP->getValueAPF().bitcastToAPInt().getLimitedValue());
|
|
else
|
|
break;
|
|
if (Elts.size() == V.size())
|
|
return ConstantDataArray::getFP(C->getContext(), Elts);
|
|
}
|
|
}
|
|
}
|
|
|
|
// Otherwise, we really do want to create a ConstantArray.
|
|
return nullptr;
|
|
}
|
|
|
|
/// getTypeForElements - Return an anonymous struct type to use for a constant
|
|
/// with the specified set of elements. The list must not be empty.
|
|
StructType *ConstantStruct::getTypeForElements(LLVMContext &Context,
|
|
ArrayRef<Constant*> V,
|
|
bool Packed) {
|
|
unsigned VecSize = V.size();
|
|
SmallVector<Type*, 16> EltTypes(VecSize);
|
|
for (unsigned i = 0; i != VecSize; ++i)
|
|
EltTypes[i] = V[i]->getType();
|
|
|
|
return StructType::get(Context, EltTypes, Packed);
|
|
}
|
|
|
|
|
|
StructType *ConstantStruct::getTypeForElements(ArrayRef<Constant*> V,
|
|
bool Packed) {
|
|
assert(!V.empty() &&
|
|
"ConstantStruct::getTypeForElements cannot be called on empty list");
|
|
return getTypeForElements(V[0]->getContext(), V, Packed);
|
|
}
|
|
|
|
|
|
ConstantStruct::ConstantStruct(StructType *T, ArrayRef<Constant *> V)
|
|
: Constant(T, ConstantStructVal,
|
|
OperandTraits<ConstantStruct>::op_end(this) - V.size(),
|
|
V.size()) {
|
|
assert(V.size() == T->getNumElements() &&
|
|
"Invalid initializer vector for constant structure");
|
|
for (unsigned i = 0, e = V.size(); i != e; ++i)
|
|
assert((T->isOpaque() || V[i]->getType() == T->getElementType(i)) &&
|
|
"Initializer for struct element doesn't match struct element type!");
|
|
std::copy(V.begin(), V.end(), op_begin());
|
|
}
|
|
|
|
// ConstantStruct accessors.
|
|
Constant *ConstantStruct::get(StructType *ST, ArrayRef<Constant*> V) {
|
|
assert((ST->isOpaque() || ST->getNumElements() == V.size()) &&
|
|
"Incorrect # elements specified to ConstantStruct::get");
|
|
|
|
// Create a ConstantAggregateZero value if all elements are zeros.
|
|
bool isZero = true;
|
|
bool isUndef = false;
|
|
|
|
if (!V.empty()) {
|
|
isUndef = isa<UndefValue>(V[0]);
|
|
isZero = V[0]->isNullValue();
|
|
if (isUndef || isZero) {
|
|
for (unsigned i = 0, e = V.size(); i != e; ++i) {
|
|
if (!V[i]->isNullValue())
|
|
isZero = false;
|
|
if (!isa<UndefValue>(V[i]))
|
|
isUndef = false;
|
|
}
|
|
}
|
|
}
|
|
if (isZero)
|
|
return ConstantAggregateZero::get(ST);
|
|
if (isUndef)
|
|
return UndefValue::get(ST);
|
|
|
|
return ST->getContext().pImpl->StructConstants.getOrCreate(ST, V);
|
|
}
|
|
|
|
Constant *ConstantStruct::get(StructType *T, ...) {
|
|
va_list ap;
|
|
SmallVector<Constant*, 8> Values;
|
|
va_start(ap, T);
|
|
while (Constant *Val = va_arg(ap, llvm::Constant*))
|
|
Values.push_back(Val);
|
|
va_end(ap);
|
|
return get(T, Values);
|
|
}
|
|
|
|
ConstantVector::ConstantVector(VectorType *T, ArrayRef<Constant *> V)
|
|
: Constant(T, ConstantVectorVal,
|
|
OperandTraits<ConstantVector>::op_end(this) - V.size(),
|
|
V.size()) {
|
|
for (size_t i = 0, e = V.size(); i != e; i++)
|
|
assert(V[i]->getType() == T->getElementType() &&
|
|
"Initializer for vector element doesn't match vector element type!");
|
|
std::copy(V.begin(), V.end(), op_begin());
|
|
}
|
|
|
|
// ConstantVector accessors.
|
|
Constant *ConstantVector::get(ArrayRef<Constant*> V) {
|
|
if (Constant *C = getImpl(V))
|
|
return C;
|
|
VectorType *Ty = VectorType::get(V.front()->getType(), V.size());
|
|
return Ty->getContext().pImpl->VectorConstants.getOrCreate(Ty, V);
|
|
}
|
|
Constant *ConstantVector::getImpl(ArrayRef<Constant*> V) {
|
|
assert(!V.empty() && "Vectors can't be empty");
|
|
VectorType *T = VectorType::get(V.front()->getType(), V.size());
|
|
|
|
// If this is an all-undef or all-zero vector, return a
|
|
// ConstantAggregateZero or UndefValue.
|
|
Constant *C = V[0];
|
|
bool isZero = C->isNullValue();
|
|
bool isUndef = isa<UndefValue>(C);
|
|
|
|
if (isZero || isUndef) {
|
|
for (unsigned i = 1, e = V.size(); i != e; ++i)
|
|
if (V[i] != C) {
|
|
isZero = isUndef = false;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (isZero)
|
|
return ConstantAggregateZero::get(T);
|
|
if (isUndef)
|
|
return UndefValue::get(T);
|
|
|
|
// Check to see if all of the elements are ConstantFP or ConstantInt and if
|
|
// the element type is compatible with ConstantDataVector. If so, use it.
|
|
if (ConstantDataSequential::isElementTypeCompatible(C->getType())) {
|
|
// We speculatively build the elements here even if it turns out that there
|
|
// is a constantexpr or something else weird in the array, since it is so
|
|
// uncommon for that to happen.
|
|
if (ConstantInt *CI = dyn_cast<ConstantInt>(C)) {
|
|
if (CI->getType()->isIntegerTy(8)) {
|
|
SmallVector<uint8_t, 16> Elts;
|
|
for (unsigned i = 0, e = V.size(); i != e; ++i)
|
|
if (ConstantInt *CI = dyn_cast<ConstantInt>(V[i]))
|
|
Elts.push_back(CI->getZExtValue());
|
|
else
|
|
break;
|
|
if (Elts.size() == V.size())
|
|
return ConstantDataVector::get(C->getContext(), Elts);
|
|
} else if (CI->getType()->isIntegerTy(16)) {
|
|
SmallVector<uint16_t, 16> Elts;
|
|
for (unsigned i = 0, e = V.size(); i != e; ++i)
|
|
if (ConstantInt *CI = dyn_cast<ConstantInt>(V[i]))
|
|
Elts.push_back(CI->getZExtValue());
|
|
else
|
|
break;
|
|
if (Elts.size() == V.size())
|
|
return ConstantDataVector::get(C->getContext(), Elts);
|
|
} else if (CI->getType()->isIntegerTy(32)) {
|
|
SmallVector<uint32_t, 16> Elts;
|
|
for (unsigned i = 0, e = V.size(); i != e; ++i)
|
|
if (ConstantInt *CI = dyn_cast<ConstantInt>(V[i]))
|
|
Elts.push_back(CI->getZExtValue());
|
|
else
|
|
break;
|
|
if (Elts.size() == V.size())
|
|
return ConstantDataVector::get(C->getContext(), Elts);
|
|
} else if (CI->getType()->isIntegerTy(64)) {
|
|
SmallVector<uint64_t, 16> Elts;
|
|
for (unsigned i = 0, e = V.size(); i != e; ++i)
|
|
if (ConstantInt *CI = dyn_cast<ConstantInt>(V[i]))
|
|
Elts.push_back(CI->getZExtValue());
|
|
else
|
|
break;
|
|
if (Elts.size() == V.size())
|
|
return ConstantDataVector::get(C->getContext(), Elts);
|
|
}
|
|
}
|
|
|
|
if (ConstantFP *CFP = dyn_cast<ConstantFP>(C)) {
|
|
if (CFP->getType()->isFloatTy()) {
|
|
SmallVector<uint32_t, 16> Elts;
|
|
for (unsigned i = 0, e = V.size(); i != e; ++i)
|
|
if (ConstantFP *CFP = dyn_cast<ConstantFP>(V[i]))
|
|
Elts.push_back(
|
|
CFP->getValueAPF().bitcastToAPInt().getLimitedValue());
|
|
else
|
|
break;
|
|
if (Elts.size() == V.size())
|
|
return ConstantDataVector::getFP(C->getContext(), Elts);
|
|
} else if (CFP->getType()->isDoubleTy()) {
|
|
SmallVector<uint64_t, 16> Elts;
|
|
for (unsigned i = 0, e = V.size(); i != e; ++i)
|
|
if (ConstantFP *CFP = dyn_cast<ConstantFP>(V[i]))
|
|
Elts.push_back(
|
|
CFP->getValueAPF().bitcastToAPInt().getLimitedValue());
|
|
else
|
|
break;
|
|
if (Elts.size() == V.size())
|
|
return ConstantDataVector::getFP(C->getContext(), Elts);
|
|
}
|
|
}
|
|
}
|
|
|
|
// Otherwise, the element type isn't compatible with ConstantDataVector, or
|
|
// the operand list constants a ConstantExpr or something else strange.
|
|
return nullptr;
|
|
}
|
|
|
|
Constant *ConstantVector::getSplat(unsigned NumElts, Constant *V) {
|
|
// If this splat is compatible with ConstantDataVector, use it instead of
|
|
// ConstantVector.
|
|
if ((isa<ConstantFP>(V) || isa<ConstantInt>(V)) &&
|
|
ConstantDataSequential::isElementTypeCompatible(V->getType()))
|
|
return ConstantDataVector::getSplat(NumElts, V);
|
|
|
|
SmallVector<Constant*, 32> Elts(NumElts, V);
|
|
return get(Elts);
|
|
}
|
|
|
|
|
|
// Utility function for determining if a ConstantExpr is a CastOp or not. This
|
|
// can't be inline because we don't want to #include Instruction.h into
|
|
// Constant.h
|
|
bool ConstantExpr::isCast() const {
|
|
return Instruction::isCast(getOpcode());
|
|
}
|
|
|
|
bool ConstantExpr::isCompare() const {
|
|
return getOpcode() == Instruction::ICmp || getOpcode() == Instruction::FCmp;
|
|
}
|
|
|
|
bool ConstantExpr::isGEPWithNoNotionalOverIndexing() const {
|
|
if (getOpcode() != Instruction::GetElementPtr) return false;
|
|
|
|
gep_type_iterator GEPI = gep_type_begin(this), E = gep_type_end(this);
|
|
User::const_op_iterator OI = std::next(this->op_begin());
|
|
|
|
// Skip the first index, as it has no static limit.
|
|
++GEPI;
|
|
++OI;
|
|
|
|
// The remaining indices must be compile-time known integers within the
|
|
// bounds of the corresponding notional static array types.
|
|
for (; GEPI != E; ++GEPI, ++OI) {
|
|
ConstantInt *CI = dyn_cast<ConstantInt>(*OI);
|
|
if (!CI) return false;
|
|
if (ArrayType *ATy = dyn_cast<ArrayType>(*GEPI))
|
|
if (CI->getValue().getActiveBits() > 64 ||
|
|
CI->getZExtValue() >= ATy->getNumElements())
|
|
return false;
|
|
}
|
|
|
|
// All the indices checked out.
|
|
return true;
|
|
}
|
|
|
|
bool ConstantExpr::hasIndices() const {
|
|
return getOpcode() == Instruction::ExtractValue ||
|
|
getOpcode() == Instruction::InsertValue;
|
|
}
|
|
|
|
ArrayRef<unsigned> ConstantExpr::getIndices() const {
|
|
if (const ExtractValueConstantExpr *EVCE =
|
|
dyn_cast<ExtractValueConstantExpr>(this))
|
|
return EVCE->Indices;
|
|
|
|
return cast<InsertValueConstantExpr>(this)->Indices;
|
|
}
|
|
|
|
unsigned ConstantExpr::getPredicate() const {
|
|
assert(isCompare());
|
|
return ((const CompareConstantExpr*)this)->predicate;
|
|
}
|
|
|
|
/// getWithOperandReplaced - Return a constant expression identical to this
|
|
/// one, but with the specified operand set to the specified value.
|
|
Constant *
|
|
ConstantExpr::getWithOperandReplaced(unsigned OpNo, Constant *Op) const {
|
|
assert(Op->getType() == getOperand(OpNo)->getType() &&
|
|
"Replacing operand with value of different type!");
|
|
if (getOperand(OpNo) == Op)
|
|
return const_cast<ConstantExpr*>(this);
|
|
|
|
SmallVector<Constant*, 8> NewOps;
|
|
for (unsigned i = 0, e = getNumOperands(); i != e; ++i)
|
|
NewOps.push_back(i == OpNo ? Op : getOperand(i));
|
|
|
|
return getWithOperands(NewOps);
|
|
}
|
|
|
|
/// getWithOperands - This returns the current constant expression with the
|
|
/// operands replaced with the specified values. The specified array must
|
|
/// have the same number of operands as our current one.
|
|
Constant *ConstantExpr::getWithOperands(ArrayRef<Constant *> Ops, Type *Ty,
|
|
bool OnlyIfReduced) const {
|
|
assert(Ops.size() == getNumOperands() && "Operand count mismatch!");
|
|
bool AnyChange = Ty != getType();
|
|
for (unsigned i = 0; i != Ops.size(); ++i)
|
|
AnyChange |= Ops[i] != getOperand(i);
|
|
|
|
if (!AnyChange) // No operands changed, return self.
|
|
return const_cast<ConstantExpr*>(this);
|
|
|
|
Type *OnlyIfReducedTy = OnlyIfReduced ? Ty : nullptr;
|
|
switch (getOpcode()) {
|
|
case Instruction::Trunc:
|
|
case Instruction::ZExt:
|
|
case Instruction::SExt:
|
|
case Instruction::FPTrunc:
|
|
case Instruction::FPExt:
|
|
case Instruction::UIToFP:
|
|
case Instruction::SIToFP:
|
|
case Instruction::FPToUI:
|
|
case Instruction::FPToSI:
|
|
case Instruction::PtrToInt:
|
|
case Instruction::IntToPtr:
|
|
case Instruction::BitCast:
|
|
case Instruction::AddrSpaceCast:
|
|
return ConstantExpr::getCast(getOpcode(), Ops[0], Ty, OnlyIfReduced);
|
|
case Instruction::Select:
|
|
return ConstantExpr::getSelect(Ops[0], Ops[1], Ops[2], OnlyIfReducedTy);
|
|
case Instruction::InsertElement:
|
|
return ConstantExpr::getInsertElement(Ops[0], Ops[1], Ops[2],
|
|
OnlyIfReducedTy);
|
|
case Instruction::ExtractElement:
|
|
return ConstantExpr::getExtractElement(Ops[0], Ops[1], OnlyIfReducedTy);
|
|
case Instruction::InsertValue:
|
|
return ConstantExpr::getInsertValue(Ops[0], Ops[1], getIndices(),
|
|
OnlyIfReducedTy);
|
|
case Instruction::ExtractValue:
|
|
return ConstantExpr::getExtractValue(Ops[0], getIndices(), OnlyIfReducedTy);
|
|
case Instruction::ShuffleVector:
|
|
return ConstantExpr::getShuffleVector(Ops[0], Ops[1], Ops[2],
|
|
OnlyIfReducedTy);
|
|
case Instruction::GetElementPtr:
|
|
return ConstantExpr::getGetElementPtr(Ops[0], Ops.slice(1),
|
|
cast<GEPOperator>(this)->isInBounds(),
|
|
OnlyIfReducedTy);
|
|
case Instruction::ICmp:
|
|
case Instruction::FCmp:
|
|
return ConstantExpr::getCompare(getPredicate(), Ops[0], Ops[1],
|
|
OnlyIfReducedTy);
|
|
default:
|
|
assert(getNumOperands() == 2 && "Must be binary operator?");
|
|
return ConstantExpr::get(getOpcode(), Ops[0], Ops[1], SubclassOptionalData,
|
|
OnlyIfReducedTy);
|
|
}
|
|
}
|
|
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
// isValueValidForType implementations
|
|
|
|
bool ConstantInt::isValueValidForType(Type *Ty, uint64_t Val) {
|
|
unsigned NumBits = Ty->getIntegerBitWidth(); // assert okay
|
|
if (Ty->isIntegerTy(1))
|
|
return Val == 0 || Val == 1;
|
|
if (NumBits >= 64)
|
|
return true; // always true, has to fit in largest type
|
|
uint64_t Max = (1ll << NumBits) - 1;
|
|
return Val <= Max;
|
|
}
|
|
|
|
bool ConstantInt::isValueValidForType(Type *Ty, int64_t Val) {
|
|
unsigned NumBits = Ty->getIntegerBitWidth();
|
|
if (Ty->isIntegerTy(1))
|
|
return Val == 0 || Val == 1 || Val == -1;
|
|
if (NumBits >= 64)
|
|
return true; // always true, has to fit in largest type
|
|
int64_t Min = -(1ll << (NumBits-1));
|
|
int64_t Max = (1ll << (NumBits-1)) - 1;
|
|
return (Val >= Min && Val <= Max);
|
|
}
|
|
|
|
bool ConstantFP::isValueValidForType(Type *Ty, const APFloat& Val) {
|
|
// convert modifies in place, so make a copy.
|
|
APFloat Val2 = APFloat(Val);
|
|
bool losesInfo;
|
|
switch (Ty->getTypeID()) {
|
|
default:
|
|
return false; // These can't be represented as floating point!
|
|
|
|
// FIXME rounding mode needs to be more flexible
|
|
case Type::HalfTyID: {
|
|
if (&Val2.getSemantics() == &APFloat::IEEEhalf)
|
|
return true;
|
|
Val2.convert(APFloat::IEEEhalf, APFloat::rmNearestTiesToEven, &losesInfo);
|
|
return !losesInfo;
|
|
}
|
|
case Type::FloatTyID: {
|
|
if (&Val2.getSemantics() == &APFloat::IEEEsingle)
|
|
return true;
|
|
Val2.convert(APFloat::IEEEsingle, APFloat::rmNearestTiesToEven, &losesInfo);
|
|
return !losesInfo;
|
|
}
|
|
case Type::DoubleTyID: {
|
|
if (&Val2.getSemantics() == &APFloat::IEEEhalf ||
|
|
&Val2.getSemantics() == &APFloat::IEEEsingle ||
|
|
&Val2.getSemantics() == &APFloat::IEEEdouble)
|
|
return true;
|
|
Val2.convert(APFloat::IEEEdouble, APFloat::rmNearestTiesToEven, &losesInfo);
|
|
return !losesInfo;
|
|
}
|
|
case Type::X86_FP80TyID:
|
|
return &Val2.getSemantics() == &APFloat::IEEEhalf ||
|
|
&Val2.getSemantics() == &APFloat::IEEEsingle ||
|
|
&Val2.getSemantics() == &APFloat::IEEEdouble ||
|
|
&Val2.getSemantics() == &APFloat::x87DoubleExtended;
|
|
case Type::FP128TyID:
|
|
return &Val2.getSemantics() == &APFloat::IEEEhalf ||
|
|
&Val2.getSemantics() == &APFloat::IEEEsingle ||
|
|
&Val2.getSemantics() == &APFloat::IEEEdouble ||
|
|
&Val2.getSemantics() == &APFloat::IEEEquad;
|
|
case Type::PPC_FP128TyID:
|
|
return &Val2.getSemantics() == &APFloat::IEEEhalf ||
|
|
&Val2.getSemantics() == &APFloat::IEEEsingle ||
|
|
&Val2.getSemantics() == &APFloat::IEEEdouble ||
|
|
&Val2.getSemantics() == &APFloat::PPCDoubleDouble;
|
|
}
|
|
}
|
|
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
// Factory Function Implementation
|
|
|
|
ConstantAggregateZero *ConstantAggregateZero::get(Type *Ty) {
|
|
assert((Ty->isStructTy() || Ty->isArrayTy() || Ty->isVectorTy()) &&
|
|
"Cannot create an aggregate zero of non-aggregate type!");
|
|
|
|
ConstantAggregateZero *&Entry = Ty->getContext().pImpl->CAZConstants[Ty];
|
|
if (!Entry)
|
|
Entry = new ConstantAggregateZero(Ty);
|
|
|
|
return Entry;
|
|
}
|
|
|
|
/// destroyConstant - Remove the constant from the constant table.
|
|
///
|
|
void ConstantAggregateZero::destroyConstant() {
|
|
getContext().pImpl->CAZConstants.erase(getType());
|
|
destroyConstantImpl();
|
|
}
|
|
|
|
/// destroyConstant - Remove the constant from the constant table...
|
|
///
|
|
void ConstantArray::destroyConstant() {
|
|
getType()->getContext().pImpl->ArrayConstants.remove(this);
|
|
destroyConstantImpl();
|
|
}
|
|
|
|
|
|
//---- ConstantStruct::get() implementation...
|
|
//
|
|
|
|
// destroyConstant - Remove the constant from the constant table...
|
|
//
|
|
void ConstantStruct::destroyConstant() {
|
|
getType()->getContext().pImpl->StructConstants.remove(this);
|
|
destroyConstantImpl();
|
|
}
|
|
|
|
// destroyConstant - Remove the constant from the constant table...
|
|
//
|
|
void ConstantVector::destroyConstant() {
|
|
getType()->getContext().pImpl->VectorConstants.remove(this);
|
|
destroyConstantImpl();
|
|
}
|
|
|
|
/// getSplatValue - If this is a splat vector constant, meaning that all of
|
|
/// the elements have the same value, return that value. Otherwise return 0.
|
|
Constant *Constant::getSplatValue() const {
|
|
assert(this->getType()->isVectorTy() && "Only valid for vectors!");
|
|
if (isa<ConstantAggregateZero>(this))
|
|
return getNullValue(this->getType()->getVectorElementType());
|
|
if (const ConstantDataVector *CV = dyn_cast<ConstantDataVector>(this))
|
|
return CV->getSplatValue();
|
|
if (const ConstantVector *CV = dyn_cast<ConstantVector>(this))
|
|
return CV->getSplatValue();
|
|
return nullptr;
|
|
}
|
|
|
|
/// getSplatValue - If this is a splat constant, where all of the
|
|
/// elements have the same value, return that value. Otherwise return null.
|
|
Constant *ConstantVector::getSplatValue() const {
|
|
// Check out first element.
|
|
Constant *Elt = getOperand(0);
|
|
// Then make sure all remaining elements point to the same value.
|
|
for (unsigned I = 1, E = getNumOperands(); I < E; ++I)
|
|
if (getOperand(I) != Elt)
|
|
return nullptr;
|
|
return Elt;
|
|
}
|
|
|
|
/// If C is a constant integer then return its value, otherwise C must be a
|
|
/// vector of constant integers, all equal, and the common value is returned.
|
|
const APInt &Constant::getUniqueInteger() const {
|
|
if (const ConstantInt *CI = dyn_cast<ConstantInt>(this))
|
|
return CI->getValue();
|
|
assert(this->getSplatValue() && "Doesn't contain a unique integer!");
|
|
const Constant *C = this->getAggregateElement(0U);
|
|
assert(C && isa<ConstantInt>(C) && "Not a vector of numbers!");
|
|
return cast<ConstantInt>(C)->getValue();
|
|
}
|
|
|
|
|
|
//---- ConstantPointerNull::get() implementation.
|
|
//
|
|
|
|
ConstantPointerNull *ConstantPointerNull::get(PointerType *Ty) {
|
|
ConstantPointerNull *&Entry = Ty->getContext().pImpl->CPNConstants[Ty];
|
|
if (!Entry)
|
|
Entry = new ConstantPointerNull(Ty);
|
|
|
|
return Entry;
|
|
}
|
|
|
|
// destroyConstant - Remove the constant from the constant table...
|
|
//
|
|
void ConstantPointerNull::destroyConstant() {
|
|
getContext().pImpl->CPNConstants.erase(getType());
|
|
// Free the constant and any dangling references to it.
|
|
destroyConstantImpl();
|
|
}
|
|
|
|
|
|
//---- UndefValue::get() implementation.
|
|
//
|
|
|
|
UndefValue *UndefValue::get(Type *Ty) {
|
|
UndefValue *&Entry = Ty->getContext().pImpl->UVConstants[Ty];
|
|
if (!Entry)
|
|
Entry = new UndefValue(Ty);
|
|
|
|
return Entry;
|
|
}
|
|
|
|
// destroyConstant - Remove the constant from the constant table.
|
|
//
|
|
void UndefValue::destroyConstant() {
|
|
// Free the constant and any dangling references to it.
|
|
getContext().pImpl->UVConstants.erase(getType());
|
|
destroyConstantImpl();
|
|
}
|
|
|
|
//---- BlockAddress::get() implementation.
|
|
//
|
|
|
|
BlockAddress *BlockAddress::get(BasicBlock *BB) {
|
|
assert(BB->getParent() && "Block must have a parent");
|
|
return get(BB->getParent(), BB);
|
|
}
|
|
|
|
BlockAddress *BlockAddress::get(Function *F, BasicBlock *BB) {
|
|
BlockAddress *&BA =
|
|
F->getContext().pImpl->BlockAddresses[std::make_pair(F, BB)];
|
|
if (!BA)
|
|
BA = new BlockAddress(F, BB);
|
|
|
|
assert(BA->getFunction() == F && "Basic block moved between functions");
|
|
return BA;
|
|
}
|
|
|
|
BlockAddress::BlockAddress(Function *F, BasicBlock *BB)
|
|
: Constant(Type::getInt8PtrTy(F->getContext()), Value::BlockAddressVal,
|
|
&Op<0>(), 2) {
|
|
setOperand(0, F);
|
|
setOperand(1, BB);
|
|
BB->AdjustBlockAddressRefCount(1);
|
|
}
|
|
|
|
BlockAddress *BlockAddress::lookup(const BasicBlock *BB) {
|
|
if (!BB->hasAddressTaken())
|
|
return nullptr;
|
|
|
|
const Function *F = BB->getParent();
|
|
assert(F && "Block must have a parent");
|
|
BlockAddress *BA =
|
|
F->getContext().pImpl->BlockAddresses.lookup(std::make_pair(F, BB));
|
|
assert(BA && "Refcount and block address map disagree!");
|
|
return BA;
|
|
}
|
|
|
|
// destroyConstant - Remove the constant from the constant table.
|
|
//
|
|
void BlockAddress::destroyConstant() {
|
|
getFunction()->getType()->getContext().pImpl
|
|
->BlockAddresses.erase(std::make_pair(getFunction(), getBasicBlock()));
|
|
getBasicBlock()->AdjustBlockAddressRefCount(-1);
|
|
destroyConstantImpl();
|
|
}
|
|
|
|
void BlockAddress::replaceUsesOfWithOnConstant(Value *From, Value *To, Use *U) {
|
|
// This could be replacing either the Basic Block or the Function. In either
|
|
// case, we have to remove the map entry.
|
|
Function *NewF = getFunction();
|
|
BasicBlock *NewBB = getBasicBlock();
|
|
|
|
if (U == &Op<0>())
|
|
NewF = cast<Function>(To->stripPointerCasts());
|
|
else
|
|
NewBB = cast<BasicBlock>(To);
|
|
|
|
// See if the 'new' entry already exists, if not, just update this in place
|
|
// and return early.
|
|
BlockAddress *&NewBA =
|
|
getContext().pImpl->BlockAddresses[std::make_pair(NewF, NewBB)];
|
|
if (NewBA) {
|
|
replaceUsesOfWithOnConstantImpl(NewBA);
|
|
return;
|
|
}
|
|
|
|
getBasicBlock()->AdjustBlockAddressRefCount(-1);
|
|
|
|
// Remove the old entry, this can't cause the map to rehash (just a
|
|
// tombstone will get added).
|
|
getContext().pImpl->BlockAddresses.erase(std::make_pair(getFunction(),
|
|
getBasicBlock()));
|
|
NewBA = this;
|
|
setOperand(0, NewF);
|
|
setOperand(1, NewBB);
|
|
getBasicBlock()->AdjustBlockAddressRefCount(1);
|
|
}
|
|
|
|
//---- ConstantExpr::get() implementations.
|
|
//
|
|
|
|
/// This is a utility function to handle folding of casts and lookup of the
|
|
/// cast in the ExprConstants map. It is used by the various get* methods below.
|
|
static Constant *getFoldedCast(Instruction::CastOps opc, Constant *C, Type *Ty,
|
|
bool OnlyIfReduced = false) {
|
|
assert(Ty->isFirstClassType() && "Cannot cast to an aggregate type!");
|
|
// Fold a few common cases
|
|
if (Constant *FC = ConstantFoldCastInstruction(opc, C, Ty))
|
|
return FC;
|
|
|
|
if (OnlyIfReduced)
|
|
return nullptr;
|
|
|
|
LLVMContextImpl *pImpl = Ty->getContext().pImpl;
|
|
|
|
// Look up the constant in the table first to ensure uniqueness.
|
|
ConstantExprKeyType Key(opc, C);
|
|
|
|
return pImpl->ExprConstants.getOrCreate(Ty, Key);
|
|
}
|
|
|
|
Constant *ConstantExpr::getCast(unsigned oc, Constant *C, Type *Ty,
|
|
bool OnlyIfReduced) {
|
|
Instruction::CastOps opc = Instruction::CastOps(oc);
|
|
assert(Instruction::isCast(opc) && "opcode out of range");
|
|
assert(C && Ty && "Null arguments to getCast");
|
|
assert(CastInst::castIsValid(opc, C, Ty) && "Invalid constantexpr cast!");
|
|
|
|
switch (opc) {
|
|
default:
|
|
llvm_unreachable("Invalid cast opcode");
|
|
case Instruction::Trunc:
|
|
return getTrunc(C, Ty, OnlyIfReduced);
|
|
case Instruction::ZExt:
|
|
return getZExt(C, Ty, OnlyIfReduced);
|
|
case Instruction::SExt:
|
|
return getSExt(C, Ty, OnlyIfReduced);
|
|
case Instruction::FPTrunc:
|
|
return getFPTrunc(C, Ty, OnlyIfReduced);
|
|
case Instruction::FPExt:
|
|
return getFPExtend(C, Ty, OnlyIfReduced);
|
|
case Instruction::UIToFP:
|
|
return getUIToFP(C, Ty, OnlyIfReduced);
|
|
case Instruction::SIToFP:
|
|
return getSIToFP(C, Ty, OnlyIfReduced);
|
|
case Instruction::FPToUI:
|
|
return getFPToUI(C, Ty, OnlyIfReduced);
|
|
case Instruction::FPToSI:
|
|
return getFPToSI(C, Ty, OnlyIfReduced);
|
|
case Instruction::PtrToInt:
|
|
return getPtrToInt(C, Ty, OnlyIfReduced);
|
|
case Instruction::IntToPtr:
|
|
return getIntToPtr(C, Ty, OnlyIfReduced);
|
|
case Instruction::BitCast:
|
|
return getBitCast(C, Ty, OnlyIfReduced);
|
|
case Instruction::AddrSpaceCast:
|
|
return getAddrSpaceCast(C, Ty, OnlyIfReduced);
|
|
}
|
|
}
|
|
|
|
Constant *ConstantExpr::getZExtOrBitCast(Constant *C, Type *Ty) {
|
|
if (C->getType()->getScalarSizeInBits() == Ty->getScalarSizeInBits())
|
|
return getBitCast(C, Ty);
|
|
return getZExt(C, Ty);
|
|
}
|
|
|
|
Constant *ConstantExpr::getSExtOrBitCast(Constant *C, Type *Ty) {
|
|
if (C->getType()->getScalarSizeInBits() == Ty->getScalarSizeInBits())
|
|
return getBitCast(C, Ty);
|
|
return getSExt(C, Ty);
|
|
}
|
|
|
|
Constant *ConstantExpr::getTruncOrBitCast(Constant *C, Type *Ty) {
|
|
if (C->getType()->getScalarSizeInBits() == Ty->getScalarSizeInBits())
|
|
return getBitCast(C, Ty);
|
|
return getTrunc(C, Ty);
|
|
}
|
|
|
|
Constant *ConstantExpr::getPointerCast(Constant *S, Type *Ty) {
|
|
assert(S->getType()->isPtrOrPtrVectorTy() && "Invalid cast");
|
|
assert((Ty->isIntOrIntVectorTy() || Ty->isPtrOrPtrVectorTy()) &&
|
|
"Invalid cast");
|
|
|
|
if (Ty->isIntOrIntVectorTy())
|
|
return getPtrToInt(S, Ty);
|
|
|
|
unsigned SrcAS = S->getType()->getPointerAddressSpace();
|
|
if (Ty->isPtrOrPtrVectorTy() && SrcAS != Ty->getPointerAddressSpace())
|
|
return getAddrSpaceCast(S, Ty);
|
|
|
|
return getBitCast(S, Ty);
|
|
}
|
|
|
|
Constant *ConstantExpr::getPointerBitCastOrAddrSpaceCast(Constant *S,
|
|
Type *Ty) {
|
|
assert(S->getType()->isPtrOrPtrVectorTy() && "Invalid cast");
|
|
assert(Ty->isPtrOrPtrVectorTy() && "Invalid cast");
|
|
|
|
if (S->getType()->getPointerAddressSpace() != Ty->getPointerAddressSpace())
|
|
return getAddrSpaceCast(S, Ty);
|
|
|
|
return getBitCast(S, Ty);
|
|
}
|
|
|
|
Constant *ConstantExpr::getIntegerCast(Constant *C, Type *Ty,
|
|
bool isSigned) {
|
|
assert(C->getType()->isIntOrIntVectorTy() &&
|
|
Ty->isIntOrIntVectorTy() && "Invalid cast");
|
|
unsigned SrcBits = C->getType()->getScalarSizeInBits();
|
|
unsigned DstBits = Ty->getScalarSizeInBits();
|
|
Instruction::CastOps opcode =
|
|
(SrcBits == DstBits ? Instruction::BitCast :
|
|
(SrcBits > DstBits ? Instruction::Trunc :
|
|
(isSigned ? Instruction::SExt : Instruction::ZExt)));
|
|
return getCast(opcode, C, Ty);
|
|
}
|
|
|
|
Constant *ConstantExpr::getFPCast(Constant *C, Type *Ty) {
|
|
assert(C->getType()->isFPOrFPVectorTy() && Ty->isFPOrFPVectorTy() &&
|
|
"Invalid cast");
|
|
unsigned SrcBits = C->getType()->getScalarSizeInBits();
|
|
unsigned DstBits = Ty->getScalarSizeInBits();
|
|
if (SrcBits == DstBits)
|
|
return C; // Avoid a useless cast
|
|
Instruction::CastOps opcode =
|
|
(SrcBits > DstBits ? Instruction::FPTrunc : Instruction::FPExt);
|
|
return getCast(opcode, C, Ty);
|
|
}
|
|
|
|
Constant *ConstantExpr::getTrunc(Constant *C, Type *Ty, bool OnlyIfReduced) {
|
|
#ifndef NDEBUG
|
|
bool fromVec = C->getType()->getTypeID() == Type::VectorTyID;
|
|
bool toVec = Ty->getTypeID() == Type::VectorTyID;
|
|
#endif
|
|
assert((fromVec == toVec) && "Cannot convert from scalar to/from vector");
|
|
assert(C->getType()->isIntOrIntVectorTy() && "Trunc operand must be integer");
|
|
assert(Ty->isIntOrIntVectorTy() && "Trunc produces only integral");
|
|
assert(C->getType()->getScalarSizeInBits() > Ty->getScalarSizeInBits()&&
|
|
"SrcTy must be larger than DestTy for Trunc!");
|
|
|
|
return getFoldedCast(Instruction::Trunc, C, Ty, OnlyIfReduced);
|
|
}
|
|
|
|
Constant *ConstantExpr::getSExt(Constant *C, Type *Ty, bool OnlyIfReduced) {
|
|
#ifndef NDEBUG
|
|
bool fromVec = C->getType()->getTypeID() == Type::VectorTyID;
|
|
bool toVec = Ty->getTypeID() == Type::VectorTyID;
|
|
#endif
|
|
assert((fromVec == toVec) && "Cannot convert from scalar to/from vector");
|
|
assert(C->getType()->isIntOrIntVectorTy() && "SExt operand must be integral");
|
|
assert(Ty->isIntOrIntVectorTy() && "SExt produces only integer");
|
|
assert(C->getType()->getScalarSizeInBits() < Ty->getScalarSizeInBits()&&
|
|
"SrcTy must be smaller than DestTy for SExt!");
|
|
|
|
return getFoldedCast(Instruction::SExt, C, Ty, OnlyIfReduced);
|
|
}
|
|
|
|
Constant *ConstantExpr::getZExt(Constant *C, Type *Ty, bool OnlyIfReduced) {
|
|
#ifndef NDEBUG
|
|
bool fromVec = C->getType()->getTypeID() == Type::VectorTyID;
|
|
bool toVec = Ty->getTypeID() == Type::VectorTyID;
|
|
#endif
|
|
assert((fromVec == toVec) && "Cannot convert from scalar to/from vector");
|
|
assert(C->getType()->isIntOrIntVectorTy() && "ZEXt operand must be integral");
|
|
assert(Ty->isIntOrIntVectorTy() && "ZExt produces only integer");
|
|
assert(C->getType()->getScalarSizeInBits() < Ty->getScalarSizeInBits()&&
|
|
"SrcTy must be smaller than DestTy for ZExt!");
|
|
|
|
return getFoldedCast(Instruction::ZExt, C, Ty, OnlyIfReduced);
|
|
}
|
|
|
|
Constant *ConstantExpr::getFPTrunc(Constant *C, Type *Ty, bool OnlyIfReduced) {
|
|
#ifndef NDEBUG
|
|
bool fromVec = C->getType()->getTypeID() == Type::VectorTyID;
|
|
bool toVec = Ty->getTypeID() == Type::VectorTyID;
|
|
#endif
|
|
assert((fromVec == toVec) && "Cannot convert from scalar to/from vector");
|
|
assert(C->getType()->isFPOrFPVectorTy() && Ty->isFPOrFPVectorTy() &&
|
|
C->getType()->getScalarSizeInBits() > Ty->getScalarSizeInBits()&&
|
|
"This is an illegal floating point truncation!");
|
|
return getFoldedCast(Instruction::FPTrunc, C, Ty, OnlyIfReduced);
|
|
}
|
|
|
|
Constant *ConstantExpr::getFPExtend(Constant *C, Type *Ty, bool OnlyIfReduced) {
|
|
#ifndef NDEBUG
|
|
bool fromVec = C->getType()->getTypeID() == Type::VectorTyID;
|
|
bool toVec = Ty->getTypeID() == Type::VectorTyID;
|
|
#endif
|
|
assert((fromVec == toVec) && "Cannot convert from scalar to/from vector");
|
|
assert(C->getType()->isFPOrFPVectorTy() && Ty->isFPOrFPVectorTy() &&
|
|
C->getType()->getScalarSizeInBits() < Ty->getScalarSizeInBits()&&
|
|
"This is an illegal floating point extension!");
|
|
return getFoldedCast(Instruction::FPExt, C, Ty, OnlyIfReduced);
|
|
}
|
|
|
|
Constant *ConstantExpr::getUIToFP(Constant *C, Type *Ty, bool OnlyIfReduced) {
|
|
#ifndef NDEBUG
|
|
bool fromVec = C->getType()->getTypeID() == Type::VectorTyID;
|
|
bool toVec = Ty->getTypeID() == Type::VectorTyID;
|
|
#endif
|
|
assert((fromVec == toVec) && "Cannot convert from scalar to/from vector");
|
|
assert(C->getType()->isIntOrIntVectorTy() && Ty->isFPOrFPVectorTy() &&
|
|
"This is an illegal uint to floating point cast!");
|
|
return getFoldedCast(Instruction::UIToFP, C, Ty, OnlyIfReduced);
|
|
}
|
|
|
|
Constant *ConstantExpr::getSIToFP(Constant *C, Type *Ty, bool OnlyIfReduced) {
|
|
#ifndef NDEBUG
|
|
bool fromVec = C->getType()->getTypeID() == Type::VectorTyID;
|
|
bool toVec = Ty->getTypeID() == Type::VectorTyID;
|
|
#endif
|
|
assert((fromVec == toVec) && "Cannot convert from scalar to/from vector");
|
|
assert(C->getType()->isIntOrIntVectorTy() && Ty->isFPOrFPVectorTy() &&
|
|
"This is an illegal sint to floating point cast!");
|
|
return getFoldedCast(Instruction::SIToFP, C, Ty, OnlyIfReduced);
|
|
}
|
|
|
|
Constant *ConstantExpr::getFPToUI(Constant *C, Type *Ty, bool OnlyIfReduced) {
|
|
#ifndef NDEBUG
|
|
bool fromVec = C->getType()->getTypeID() == Type::VectorTyID;
|
|
bool toVec = Ty->getTypeID() == Type::VectorTyID;
|
|
#endif
|
|
assert((fromVec == toVec) && "Cannot convert from scalar to/from vector");
|
|
assert(C->getType()->isFPOrFPVectorTy() && Ty->isIntOrIntVectorTy() &&
|
|
"This is an illegal floating point to uint cast!");
|
|
return getFoldedCast(Instruction::FPToUI, C, Ty, OnlyIfReduced);
|
|
}
|
|
|
|
Constant *ConstantExpr::getFPToSI(Constant *C, Type *Ty, bool OnlyIfReduced) {
|
|
#ifndef NDEBUG
|
|
bool fromVec = C->getType()->getTypeID() == Type::VectorTyID;
|
|
bool toVec = Ty->getTypeID() == Type::VectorTyID;
|
|
#endif
|
|
assert((fromVec == toVec) && "Cannot convert from scalar to/from vector");
|
|
assert(C->getType()->isFPOrFPVectorTy() && Ty->isIntOrIntVectorTy() &&
|
|
"This is an illegal floating point to sint cast!");
|
|
return getFoldedCast(Instruction::FPToSI, C, Ty, OnlyIfReduced);
|
|
}
|
|
|
|
Constant *ConstantExpr::getPtrToInt(Constant *C, Type *DstTy,
|
|
bool OnlyIfReduced) {
|
|
assert(C->getType()->getScalarType()->isPointerTy() &&
|
|
"PtrToInt source must be pointer or pointer vector");
|
|
assert(DstTy->getScalarType()->isIntegerTy() &&
|
|
"PtrToInt destination must be integer or integer vector");
|
|
assert(isa<VectorType>(C->getType()) == isa<VectorType>(DstTy));
|
|
if (isa<VectorType>(C->getType()))
|
|
assert(C->getType()->getVectorNumElements()==DstTy->getVectorNumElements()&&
|
|
"Invalid cast between a different number of vector elements");
|
|
return getFoldedCast(Instruction::PtrToInt, C, DstTy, OnlyIfReduced);
|
|
}
|
|
|
|
Constant *ConstantExpr::getIntToPtr(Constant *C, Type *DstTy,
|
|
bool OnlyIfReduced) {
|
|
assert(C->getType()->getScalarType()->isIntegerTy() &&
|
|
"IntToPtr source must be integer or integer vector");
|
|
assert(DstTy->getScalarType()->isPointerTy() &&
|
|
"IntToPtr destination must be a pointer or pointer vector");
|
|
assert(isa<VectorType>(C->getType()) == isa<VectorType>(DstTy));
|
|
if (isa<VectorType>(C->getType()))
|
|
assert(C->getType()->getVectorNumElements()==DstTy->getVectorNumElements()&&
|
|
"Invalid cast between a different number of vector elements");
|
|
return getFoldedCast(Instruction::IntToPtr, C, DstTy, OnlyIfReduced);
|
|
}
|
|
|
|
Constant *ConstantExpr::getBitCast(Constant *C, Type *DstTy,
|
|
bool OnlyIfReduced) {
|
|
assert(CastInst::castIsValid(Instruction::BitCast, C, DstTy) &&
|
|
"Invalid constantexpr bitcast!");
|
|
|
|
// It is common to ask for a bitcast of a value to its own type, handle this
|
|
// speedily.
|
|
if (C->getType() == DstTy) return C;
|
|
|
|
return getFoldedCast(Instruction::BitCast, C, DstTy, OnlyIfReduced);
|
|
}
|
|
|
|
Constant *ConstantExpr::getAddrSpaceCast(Constant *C, Type *DstTy,
|
|
bool OnlyIfReduced) {
|
|
assert(CastInst::castIsValid(Instruction::AddrSpaceCast, C, DstTy) &&
|
|
"Invalid constantexpr addrspacecast!");
|
|
|
|
// Canonicalize addrspacecasts between different pointer types by first
|
|
// bitcasting the pointer type and then converting the address space.
|
|
PointerType *SrcScalarTy = cast<PointerType>(C->getType()->getScalarType());
|
|
PointerType *DstScalarTy = cast<PointerType>(DstTy->getScalarType());
|
|
Type *DstElemTy = DstScalarTy->getElementType();
|
|
if (SrcScalarTy->getElementType() != DstElemTy) {
|
|
Type *MidTy = PointerType::get(DstElemTy, SrcScalarTy->getAddressSpace());
|
|
if (VectorType *VT = dyn_cast<VectorType>(DstTy)) {
|
|
// Handle vectors of pointers.
|
|
MidTy = VectorType::get(MidTy, VT->getNumElements());
|
|
}
|
|
C = getBitCast(C, MidTy);
|
|
}
|
|
return getFoldedCast(Instruction::AddrSpaceCast, C, DstTy, OnlyIfReduced);
|
|
}
|
|
|
|
Constant *ConstantExpr::get(unsigned Opcode, Constant *C1, Constant *C2,
|
|
unsigned Flags, Type *OnlyIfReducedTy) {
|
|
// Check the operands for consistency first.
|
|
assert(Opcode >= Instruction::BinaryOpsBegin &&
|
|
Opcode < Instruction::BinaryOpsEnd &&
|
|
"Invalid opcode in binary constant expression");
|
|
assert(C1->getType() == C2->getType() &&
|
|
"Operand types in binary constant expression should match");
|
|
|
|
#ifndef NDEBUG
|
|
switch (Opcode) {
|
|
case Instruction::Add:
|
|
case Instruction::Sub:
|
|
case Instruction::Mul:
|
|
assert(C1->getType() == C2->getType() && "Op types should be identical!");
|
|
assert(C1->getType()->isIntOrIntVectorTy() &&
|
|
"Tried to create an integer operation on a non-integer type!");
|
|
break;
|
|
case Instruction::FAdd:
|
|
case Instruction::FSub:
|
|
case Instruction::FMul:
|
|
assert(C1->getType() == C2->getType() && "Op types should be identical!");
|
|
assert(C1->getType()->isFPOrFPVectorTy() &&
|
|
"Tried to create a floating-point operation on a "
|
|
"non-floating-point type!");
|
|
break;
|
|
case Instruction::UDiv:
|
|
case Instruction::SDiv:
|
|
assert(C1->getType() == C2->getType() && "Op types should be identical!");
|
|
assert(C1->getType()->isIntOrIntVectorTy() &&
|
|
"Tried to create an arithmetic operation on a non-arithmetic type!");
|
|
break;
|
|
case Instruction::FDiv:
|
|
assert(C1->getType() == C2->getType() && "Op types should be identical!");
|
|
assert(C1->getType()->isFPOrFPVectorTy() &&
|
|
"Tried to create an arithmetic operation on a non-arithmetic type!");
|
|
break;
|
|
case Instruction::URem:
|
|
case Instruction::SRem:
|
|
assert(C1->getType() == C2->getType() && "Op types should be identical!");
|
|
assert(C1->getType()->isIntOrIntVectorTy() &&
|
|
"Tried to create an arithmetic operation on a non-arithmetic type!");
|
|
break;
|
|
case Instruction::FRem:
|
|
assert(C1->getType() == C2->getType() && "Op types should be identical!");
|
|
assert(C1->getType()->isFPOrFPVectorTy() &&
|
|
"Tried to create an arithmetic operation on a non-arithmetic type!");
|
|
break;
|
|
case Instruction::And:
|
|
case Instruction::Or:
|
|
case Instruction::Xor:
|
|
assert(C1->getType() == C2->getType() && "Op types should be identical!");
|
|
assert(C1->getType()->isIntOrIntVectorTy() &&
|
|
"Tried to create a logical operation on a non-integral type!");
|
|
break;
|
|
case Instruction::Shl:
|
|
case Instruction::LShr:
|
|
case Instruction::AShr:
|
|
assert(C1->getType() == C2->getType() && "Op types should be identical!");
|
|
assert(C1->getType()->isIntOrIntVectorTy() &&
|
|
"Tried to create a shift operation on a non-integer type!");
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
#endif
|
|
|
|
if (Constant *FC = ConstantFoldBinaryInstruction(Opcode, C1, C2))
|
|
return FC; // Fold a few common cases.
|
|
|
|
if (OnlyIfReducedTy == C1->getType())
|
|
return nullptr;
|
|
|
|
Constant *ArgVec[] = { C1, C2 };
|
|
ConstantExprKeyType Key(Opcode, ArgVec, 0, Flags);
|
|
|
|
LLVMContextImpl *pImpl = C1->getContext().pImpl;
|
|
return pImpl->ExprConstants.getOrCreate(C1->getType(), Key);
|
|
}
|
|
|
|
Constant *ConstantExpr::getSizeOf(Type* Ty) {
|
|
// sizeof is implemented as: (i64) gep (Ty*)null, 1
|
|
// Note that a non-inbounds gep is used, as null isn't within any object.
|
|
Constant *GEPIdx = ConstantInt::get(Type::getInt32Ty(Ty->getContext()), 1);
|
|
Constant *GEP = getGetElementPtr(
|
|
Constant::getNullValue(PointerType::getUnqual(Ty)), GEPIdx);
|
|
return getPtrToInt(GEP,
|
|
Type::getInt64Ty(Ty->getContext()));
|
|
}
|
|
|
|
Constant *ConstantExpr::getAlignOf(Type* Ty) {
|
|
// alignof is implemented as: (i64) gep ({i1,Ty}*)null, 0, 1
|
|
// Note that a non-inbounds gep is used, as null isn't within any object.
|
|
Type *AligningTy =
|
|
StructType::get(Type::getInt1Ty(Ty->getContext()), Ty, nullptr);
|
|
Constant *NullPtr = Constant::getNullValue(AligningTy->getPointerTo(0));
|
|
Constant *Zero = ConstantInt::get(Type::getInt64Ty(Ty->getContext()), 0);
|
|
Constant *One = ConstantInt::get(Type::getInt32Ty(Ty->getContext()), 1);
|
|
Constant *Indices[2] = { Zero, One };
|
|
Constant *GEP = getGetElementPtr(NullPtr, Indices);
|
|
return getPtrToInt(GEP,
|
|
Type::getInt64Ty(Ty->getContext()));
|
|
}
|
|
|
|
Constant *ConstantExpr::getOffsetOf(StructType* STy, unsigned FieldNo) {
|
|
return getOffsetOf(STy, ConstantInt::get(Type::getInt32Ty(STy->getContext()),
|
|
FieldNo));
|
|
}
|
|
|
|
Constant *ConstantExpr::getOffsetOf(Type* Ty, Constant *FieldNo) {
|
|
// offsetof is implemented as: (i64) gep (Ty*)null, 0, FieldNo
|
|
// Note that a non-inbounds gep is used, as null isn't within any object.
|
|
Constant *GEPIdx[] = {
|
|
ConstantInt::get(Type::getInt64Ty(Ty->getContext()), 0),
|
|
FieldNo
|
|
};
|
|
Constant *GEP = getGetElementPtr(
|
|
Constant::getNullValue(PointerType::getUnqual(Ty)), GEPIdx);
|
|
return getPtrToInt(GEP,
|
|
Type::getInt64Ty(Ty->getContext()));
|
|
}
|
|
|
|
Constant *ConstantExpr::getCompare(unsigned short Predicate, Constant *C1,
|
|
Constant *C2, bool OnlyIfReduced) {
|
|
assert(C1->getType() == C2->getType() && "Op types should be identical!");
|
|
|
|
switch (Predicate) {
|
|
default: llvm_unreachable("Invalid CmpInst predicate");
|
|
case CmpInst::FCMP_FALSE: case CmpInst::FCMP_OEQ: case CmpInst::FCMP_OGT:
|
|
case CmpInst::FCMP_OGE: case CmpInst::FCMP_OLT: case CmpInst::FCMP_OLE:
|
|
case CmpInst::FCMP_ONE: case CmpInst::FCMP_ORD: case CmpInst::FCMP_UNO:
|
|
case CmpInst::FCMP_UEQ: case CmpInst::FCMP_UGT: case CmpInst::FCMP_UGE:
|
|
case CmpInst::FCMP_ULT: case CmpInst::FCMP_ULE: case CmpInst::FCMP_UNE:
|
|
case CmpInst::FCMP_TRUE:
|
|
return getFCmp(Predicate, C1, C2, OnlyIfReduced);
|
|
|
|
case CmpInst::ICMP_EQ: case CmpInst::ICMP_NE: case CmpInst::ICMP_UGT:
|
|
case CmpInst::ICMP_UGE: case CmpInst::ICMP_ULT: case CmpInst::ICMP_ULE:
|
|
case CmpInst::ICMP_SGT: case CmpInst::ICMP_SGE: case CmpInst::ICMP_SLT:
|
|
case CmpInst::ICMP_SLE:
|
|
return getICmp(Predicate, C1, C2, OnlyIfReduced);
|
|
}
|
|
}
|
|
|
|
Constant *ConstantExpr::getSelect(Constant *C, Constant *V1, Constant *V2,
|
|
Type *OnlyIfReducedTy) {
|
|
assert(!SelectInst::areInvalidOperands(C, V1, V2)&&"Invalid select operands");
|
|
|
|
if (Constant *SC = ConstantFoldSelectInstruction(C, V1, V2))
|
|
return SC; // Fold common cases
|
|
|
|
if (OnlyIfReducedTy == V1->getType())
|
|
return nullptr;
|
|
|
|
Constant *ArgVec[] = { C, V1, V2 };
|
|
ConstantExprKeyType Key(Instruction::Select, ArgVec);
|
|
|
|
LLVMContextImpl *pImpl = C->getContext().pImpl;
|
|
return pImpl->ExprConstants.getOrCreate(V1->getType(), Key);
|
|
}
|
|
|
|
Constant *ConstantExpr::getGetElementPtr(Constant *C, ArrayRef<Value *> Idxs,
|
|
bool InBounds, Type *OnlyIfReducedTy) {
|
|
assert(C->getType()->isPtrOrPtrVectorTy() &&
|
|
"Non-pointer type for constant GetElementPtr expression");
|
|
|
|
if (Constant *FC = ConstantFoldGetElementPtr(C, InBounds, Idxs))
|
|
return FC; // Fold a few common cases.
|
|
|
|
// Get the result type of the getelementptr!
|
|
Type *Ty = GetElementPtrInst::getIndexedType(C->getType(), Idxs);
|
|
assert(Ty && "GEP indices invalid!");
|
|
unsigned AS = C->getType()->getPointerAddressSpace();
|
|
Type *ReqTy = Ty->getPointerTo(AS);
|
|
if (VectorType *VecTy = dyn_cast<VectorType>(C->getType()))
|
|
ReqTy = VectorType::get(ReqTy, VecTy->getNumElements());
|
|
|
|
if (OnlyIfReducedTy == ReqTy)
|
|
return nullptr;
|
|
|
|
// Look up the constant in the table first to ensure uniqueness
|
|
std::vector<Constant*> ArgVec;
|
|
ArgVec.reserve(1 + Idxs.size());
|
|
ArgVec.push_back(C);
|
|
for (unsigned i = 0, e = Idxs.size(); i != e; ++i) {
|
|
assert(Idxs[i]->getType()->isVectorTy() == ReqTy->isVectorTy() &&
|
|
"getelementptr index type missmatch");
|
|
assert((!Idxs[i]->getType()->isVectorTy() ||
|
|
ReqTy->getVectorNumElements() ==
|
|
Idxs[i]->getType()->getVectorNumElements()) &&
|
|
"getelementptr index type missmatch");
|
|
ArgVec.push_back(cast<Constant>(Idxs[i]));
|
|
}
|
|
const ConstantExprKeyType Key(Instruction::GetElementPtr, ArgVec, 0,
|
|
InBounds ? GEPOperator::IsInBounds : 0);
|
|
|
|
LLVMContextImpl *pImpl = C->getContext().pImpl;
|
|
return pImpl->ExprConstants.getOrCreate(ReqTy, Key);
|
|
}
|
|
|
|
Constant *ConstantExpr::getICmp(unsigned short pred, Constant *LHS,
|
|
Constant *RHS, bool OnlyIfReduced) {
|
|
assert(LHS->getType() == RHS->getType());
|
|
assert(pred >= ICmpInst::FIRST_ICMP_PREDICATE &&
|
|
pred <= ICmpInst::LAST_ICMP_PREDICATE && "Invalid ICmp Predicate");
|
|
|
|
if (Constant *FC = ConstantFoldCompareInstruction(pred, LHS, RHS))
|
|
return FC; // Fold a few common cases...
|
|
|
|
if (OnlyIfReduced)
|
|
return nullptr;
|
|
|
|
// Look up the constant in the table first to ensure uniqueness
|
|
Constant *ArgVec[] = { LHS, RHS };
|
|
// Get the key type with both the opcode and predicate
|
|
const ConstantExprKeyType Key(Instruction::ICmp, ArgVec, pred);
|
|
|
|
Type *ResultTy = Type::getInt1Ty(LHS->getContext());
|
|
if (VectorType *VT = dyn_cast<VectorType>(LHS->getType()))
|
|
ResultTy = VectorType::get(ResultTy, VT->getNumElements());
|
|
|
|
LLVMContextImpl *pImpl = LHS->getType()->getContext().pImpl;
|
|
return pImpl->ExprConstants.getOrCreate(ResultTy, Key);
|
|
}
|
|
|
|
Constant *ConstantExpr::getFCmp(unsigned short pred, Constant *LHS,
|
|
Constant *RHS, bool OnlyIfReduced) {
|
|
assert(LHS->getType() == RHS->getType());
|
|
assert(pred <= FCmpInst::LAST_FCMP_PREDICATE && "Invalid FCmp Predicate");
|
|
|
|
if (Constant *FC = ConstantFoldCompareInstruction(pred, LHS, RHS))
|
|
return FC; // Fold a few common cases...
|
|
|
|
if (OnlyIfReduced)
|
|
return nullptr;
|
|
|
|
// Look up the constant in the table first to ensure uniqueness
|
|
Constant *ArgVec[] = { LHS, RHS };
|
|
// Get the key type with both the opcode and predicate
|
|
const ConstantExprKeyType Key(Instruction::FCmp, ArgVec, pred);
|
|
|
|
Type *ResultTy = Type::getInt1Ty(LHS->getContext());
|
|
if (VectorType *VT = dyn_cast<VectorType>(LHS->getType()))
|
|
ResultTy = VectorType::get(ResultTy, VT->getNumElements());
|
|
|
|
LLVMContextImpl *pImpl = LHS->getType()->getContext().pImpl;
|
|
return pImpl->ExprConstants.getOrCreate(ResultTy, Key);
|
|
}
|
|
|
|
Constant *ConstantExpr::getExtractElement(Constant *Val, Constant *Idx,
|
|
Type *OnlyIfReducedTy) {
|
|
assert(Val->getType()->isVectorTy() &&
|
|
"Tried to create extractelement operation on non-vector type!");
|
|
assert(Idx->getType()->isIntegerTy() &&
|
|
"Extractelement index must be an integer type!");
|
|
|
|
if (Constant *FC = ConstantFoldExtractElementInstruction(Val, Idx))
|
|
return FC; // Fold a few common cases.
|
|
|
|
Type *ReqTy = Val->getType()->getVectorElementType();
|
|
if (OnlyIfReducedTy == ReqTy)
|
|
return nullptr;
|
|
|
|
// Look up the constant in the table first to ensure uniqueness
|
|
Constant *ArgVec[] = { Val, Idx };
|
|
const ConstantExprKeyType Key(Instruction::ExtractElement, ArgVec);
|
|
|
|
LLVMContextImpl *pImpl = Val->getContext().pImpl;
|
|
return pImpl->ExprConstants.getOrCreate(ReqTy, Key);
|
|
}
|
|
|
|
Constant *ConstantExpr::getInsertElement(Constant *Val, Constant *Elt,
|
|
Constant *Idx, Type *OnlyIfReducedTy) {
|
|
assert(Val->getType()->isVectorTy() &&
|
|
"Tried to create insertelement operation on non-vector type!");
|
|
assert(Elt->getType() == Val->getType()->getVectorElementType() &&
|
|
"Insertelement types must match!");
|
|
assert(Idx->getType()->isIntegerTy() &&
|
|
"Insertelement index must be i32 type!");
|
|
|
|
if (Constant *FC = ConstantFoldInsertElementInstruction(Val, Elt, Idx))
|
|
return FC; // Fold a few common cases.
|
|
|
|
if (OnlyIfReducedTy == Val->getType())
|
|
return nullptr;
|
|
|
|
// Look up the constant in the table first to ensure uniqueness
|
|
Constant *ArgVec[] = { Val, Elt, Idx };
|
|
const ConstantExprKeyType Key(Instruction::InsertElement, ArgVec);
|
|
|
|
LLVMContextImpl *pImpl = Val->getContext().pImpl;
|
|
return pImpl->ExprConstants.getOrCreate(Val->getType(), Key);
|
|
}
|
|
|
|
Constant *ConstantExpr::getShuffleVector(Constant *V1, Constant *V2,
|
|
Constant *Mask, Type *OnlyIfReducedTy) {
|
|
assert(ShuffleVectorInst::isValidOperands(V1, V2, Mask) &&
|
|
"Invalid shuffle vector constant expr operands!");
|
|
|
|
if (Constant *FC = ConstantFoldShuffleVectorInstruction(V1, V2, Mask))
|
|
return FC; // Fold a few common cases.
|
|
|
|
unsigned NElts = Mask->getType()->getVectorNumElements();
|
|
Type *EltTy = V1->getType()->getVectorElementType();
|
|
Type *ShufTy = VectorType::get(EltTy, NElts);
|
|
|
|
if (OnlyIfReducedTy == ShufTy)
|
|
return nullptr;
|
|
|
|
// Look up the constant in the table first to ensure uniqueness
|
|
Constant *ArgVec[] = { V1, V2, Mask };
|
|
const ConstantExprKeyType Key(Instruction::ShuffleVector, ArgVec);
|
|
|
|
LLVMContextImpl *pImpl = ShufTy->getContext().pImpl;
|
|
return pImpl->ExprConstants.getOrCreate(ShufTy, Key);
|
|
}
|
|
|
|
Constant *ConstantExpr::getInsertValue(Constant *Agg, Constant *Val,
|
|
ArrayRef<unsigned> Idxs,
|
|
Type *OnlyIfReducedTy) {
|
|
assert(Agg->getType()->isFirstClassType() &&
|
|
"Non-first-class type for constant insertvalue expression");
|
|
|
|
assert(ExtractValueInst::getIndexedType(Agg->getType(),
|
|
Idxs) == Val->getType() &&
|
|
"insertvalue indices invalid!");
|
|
Type *ReqTy = Val->getType();
|
|
|
|
if (Constant *FC = ConstantFoldInsertValueInstruction(Agg, Val, Idxs))
|
|
return FC;
|
|
|
|
if (OnlyIfReducedTy == ReqTy)
|
|
return nullptr;
|
|
|
|
Constant *ArgVec[] = { Agg, Val };
|
|
const ConstantExprKeyType Key(Instruction::InsertValue, ArgVec, 0, 0, Idxs);
|
|
|
|
LLVMContextImpl *pImpl = Agg->getContext().pImpl;
|
|
return pImpl->ExprConstants.getOrCreate(ReqTy, Key);
|
|
}
|
|
|
|
Constant *ConstantExpr::getExtractValue(Constant *Agg, ArrayRef<unsigned> Idxs,
|
|
Type *OnlyIfReducedTy) {
|
|
assert(Agg->getType()->isFirstClassType() &&
|
|
"Tried to create extractelement operation on non-first-class type!");
|
|
|
|
Type *ReqTy = ExtractValueInst::getIndexedType(Agg->getType(), Idxs);
|
|
(void)ReqTy;
|
|
assert(ReqTy && "extractvalue indices invalid!");
|
|
|
|
assert(Agg->getType()->isFirstClassType() &&
|
|
"Non-first-class type for constant extractvalue expression");
|
|
if (Constant *FC = ConstantFoldExtractValueInstruction(Agg, Idxs))
|
|
return FC;
|
|
|
|
if (OnlyIfReducedTy == ReqTy)
|
|
return nullptr;
|
|
|
|
Constant *ArgVec[] = { Agg };
|
|
const ConstantExprKeyType Key(Instruction::ExtractValue, ArgVec, 0, 0, Idxs);
|
|
|
|
LLVMContextImpl *pImpl = Agg->getContext().pImpl;
|
|
return pImpl->ExprConstants.getOrCreate(ReqTy, Key);
|
|
}
|
|
|
|
Constant *ConstantExpr::getNeg(Constant *C, bool HasNUW, bool HasNSW) {
|
|
assert(C->getType()->isIntOrIntVectorTy() &&
|
|
"Cannot NEG a nonintegral value!");
|
|
return getSub(ConstantFP::getZeroValueForNegation(C->getType()),
|
|
C, HasNUW, HasNSW);
|
|
}
|
|
|
|
Constant *ConstantExpr::getFNeg(Constant *C) {
|
|
assert(C->getType()->isFPOrFPVectorTy() &&
|
|
"Cannot FNEG a non-floating-point value!");
|
|
return getFSub(ConstantFP::getZeroValueForNegation(C->getType()), C);
|
|
}
|
|
|
|
Constant *ConstantExpr::getNot(Constant *C) {
|
|
assert(C->getType()->isIntOrIntVectorTy() &&
|
|
"Cannot NOT a nonintegral value!");
|
|
return get(Instruction::Xor, C, Constant::getAllOnesValue(C->getType()));
|
|
}
|
|
|
|
Constant *ConstantExpr::getAdd(Constant *C1, Constant *C2,
|
|
bool HasNUW, bool HasNSW) {
|
|
unsigned Flags = (HasNUW ? OverflowingBinaryOperator::NoUnsignedWrap : 0) |
|
|
(HasNSW ? OverflowingBinaryOperator::NoSignedWrap : 0);
|
|
return get(Instruction::Add, C1, C2, Flags);
|
|
}
|
|
|
|
Constant *ConstantExpr::getFAdd(Constant *C1, Constant *C2) {
|
|
return get(Instruction::FAdd, C1, C2);
|
|
}
|
|
|
|
Constant *ConstantExpr::getSub(Constant *C1, Constant *C2,
|
|
bool HasNUW, bool HasNSW) {
|
|
unsigned Flags = (HasNUW ? OverflowingBinaryOperator::NoUnsignedWrap : 0) |
|
|
(HasNSW ? OverflowingBinaryOperator::NoSignedWrap : 0);
|
|
return get(Instruction::Sub, C1, C2, Flags);
|
|
}
|
|
|
|
Constant *ConstantExpr::getFSub(Constant *C1, Constant *C2) {
|
|
return get(Instruction::FSub, C1, C2);
|
|
}
|
|
|
|
Constant *ConstantExpr::getMul(Constant *C1, Constant *C2,
|
|
bool HasNUW, bool HasNSW) {
|
|
unsigned Flags = (HasNUW ? OverflowingBinaryOperator::NoUnsignedWrap : 0) |
|
|
(HasNSW ? OverflowingBinaryOperator::NoSignedWrap : 0);
|
|
return get(Instruction::Mul, C1, C2, Flags);
|
|
}
|
|
|
|
Constant *ConstantExpr::getFMul(Constant *C1, Constant *C2) {
|
|
return get(Instruction::FMul, C1, C2);
|
|
}
|
|
|
|
Constant *ConstantExpr::getUDiv(Constant *C1, Constant *C2, bool isExact) {
|
|
return get(Instruction::UDiv, C1, C2,
|
|
isExact ? PossiblyExactOperator::IsExact : 0);
|
|
}
|
|
|
|
Constant *ConstantExpr::getSDiv(Constant *C1, Constant *C2, bool isExact) {
|
|
return get(Instruction::SDiv, C1, C2,
|
|
isExact ? PossiblyExactOperator::IsExact : 0);
|
|
}
|
|
|
|
Constant *ConstantExpr::getFDiv(Constant *C1, Constant *C2) {
|
|
return get(Instruction::FDiv, C1, C2);
|
|
}
|
|
|
|
Constant *ConstantExpr::getURem(Constant *C1, Constant *C2) {
|
|
return get(Instruction::URem, C1, C2);
|
|
}
|
|
|
|
Constant *ConstantExpr::getSRem(Constant *C1, Constant *C2) {
|
|
return get(Instruction::SRem, C1, C2);
|
|
}
|
|
|
|
Constant *ConstantExpr::getFRem(Constant *C1, Constant *C2) {
|
|
return get(Instruction::FRem, C1, C2);
|
|
}
|
|
|
|
Constant *ConstantExpr::getAnd(Constant *C1, Constant *C2) {
|
|
return get(Instruction::And, C1, C2);
|
|
}
|
|
|
|
Constant *ConstantExpr::getOr(Constant *C1, Constant *C2) {
|
|
return get(Instruction::Or, C1, C2);
|
|
}
|
|
|
|
Constant *ConstantExpr::getXor(Constant *C1, Constant *C2) {
|
|
return get(Instruction::Xor, C1, C2);
|
|
}
|
|
|
|
Constant *ConstantExpr::getShl(Constant *C1, Constant *C2,
|
|
bool HasNUW, bool HasNSW) {
|
|
unsigned Flags = (HasNUW ? OverflowingBinaryOperator::NoUnsignedWrap : 0) |
|
|
(HasNSW ? OverflowingBinaryOperator::NoSignedWrap : 0);
|
|
return get(Instruction::Shl, C1, C2, Flags);
|
|
}
|
|
|
|
Constant *ConstantExpr::getLShr(Constant *C1, Constant *C2, bool isExact) {
|
|
return get(Instruction::LShr, C1, C2,
|
|
isExact ? PossiblyExactOperator::IsExact : 0);
|
|
}
|
|
|
|
Constant *ConstantExpr::getAShr(Constant *C1, Constant *C2, bool isExact) {
|
|
return get(Instruction::AShr, C1, C2,
|
|
isExact ? PossiblyExactOperator::IsExact : 0);
|
|
}
|
|
|
|
/// getBinOpIdentity - Return the identity for the given binary operation,
|
|
/// i.e. a constant C such that X op C = X and C op X = X for every X. It
|
|
/// returns null if the operator doesn't have an identity.
|
|
Constant *ConstantExpr::getBinOpIdentity(unsigned Opcode, Type *Ty) {
|
|
switch (Opcode) {
|
|
default:
|
|
// Doesn't have an identity.
|
|
return nullptr;
|
|
|
|
case Instruction::Add:
|
|
case Instruction::Or:
|
|
case Instruction::Xor:
|
|
return Constant::getNullValue(Ty);
|
|
|
|
case Instruction::Mul:
|
|
return ConstantInt::get(Ty, 1);
|
|
|
|
case Instruction::And:
|
|
return Constant::getAllOnesValue(Ty);
|
|
}
|
|
}
|
|
|
|
/// getBinOpAbsorber - Return the absorbing element for the given binary
|
|
/// operation, i.e. a constant C such that X op C = C and C op X = C for
|
|
/// every X. For example, this returns zero for integer multiplication.
|
|
/// It returns null if the operator doesn't have an absorbing element.
|
|
Constant *ConstantExpr::getBinOpAbsorber(unsigned Opcode, Type *Ty) {
|
|
switch (Opcode) {
|
|
default:
|
|
// Doesn't have an absorber.
|
|
return nullptr;
|
|
|
|
case Instruction::Or:
|
|
return Constant::getAllOnesValue(Ty);
|
|
|
|
case Instruction::And:
|
|
case Instruction::Mul:
|
|
return Constant::getNullValue(Ty);
|
|
}
|
|
}
|
|
|
|
// destroyConstant - Remove the constant from the constant table...
|
|
//
|
|
void ConstantExpr::destroyConstant() {
|
|
getType()->getContext().pImpl->ExprConstants.remove(this);
|
|
destroyConstantImpl();
|
|
}
|
|
|
|
const char *ConstantExpr::getOpcodeName() const {
|
|
return Instruction::getOpcodeName(getOpcode());
|
|
}
|
|
|
|
|
|
|
|
GetElementPtrConstantExpr::
|
|
GetElementPtrConstantExpr(Constant *C, ArrayRef<Constant*> IdxList,
|
|
Type *DestTy)
|
|
: ConstantExpr(DestTy, Instruction::GetElementPtr,
|
|
OperandTraits<GetElementPtrConstantExpr>::op_end(this)
|
|
- (IdxList.size()+1), IdxList.size()+1) {
|
|
OperandList[0] = C;
|
|
for (unsigned i = 0, E = IdxList.size(); i != E; ++i)
|
|
OperandList[i+1] = IdxList[i];
|
|
}
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
// ConstantData* implementations
|
|
|
|
void ConstantDataArray::anchor() {}
|
|
void ConstantDataVector::anchor() {}
|
|
|
|
/// getElementType - Return the element type of the array/vector.
|
|
Type *ConstantDataSequential::getElementType() const {
|
|
return getType()->getElementType();
|
|
}
|
|
|
|
StringRef ConstantDataSequential::getRawDataValues() const {
|
|
return StringRef(DataElements, getNumElements()*getElementByteSize());
|
|
}
|
|
|
|
/// isElementTypeCompatible - Return true if a ConstantDataSequential can be
|
|
/// formed with a vector or array of the specified element type.
|
|
/// ConstantDataArray only works with normal float and int types that are
|
|
/// stored densely in memory, not with things like i42 or x86_f80.
|
|
bool ConstantDataSequential::isElementTypeCompatible(const Type *Ty) {
|
|
if (Ty->isFloatTy() || Ty->isDoubleTy()) return true;
|
|
if (const IntegerType *IT = dyn_cast<IntegerType>(Ty)) {
|
|
switch (IT->getBitWidth()) {
|
|
case 8:
|
|
case 16:
|
|
case 32:
|
|
case 64:
|
|
return true;
|
|
default: break;
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
/// getNumElements - Return the number of elements in the array or vector.
|
|
unsigned ConstantDataSequential::getNumElements() const {
|
|
if (ArrayType *AT = dyn_cast<ArrayType>(getType()))
|
|
return AT->getNumElements();
|
|
return getType()->getVectorNumElements();
|
|
}
|
|
|
|
|
|
/// getElementByteSize - Return the size in bytes of the elements in the data.
|
|
uint64_t ConstantDataSequential::getElementByteSize() const {
|
|
return getElementType()->getPrimitiveSizeInBits()/8;
|
|
}
|
|
|
|
/// getElementPointer - Return the start of the specified element.
|
|
const char *ConstantDataSequential::getElementPointer(unsigned Elt) const {
|
|
assert(Elt < getNumElements() && "Invalid Elt");
|
|
return DataElements+Elt*getElementByteSize();
|
|
}
|
|
|
|
|
|
/// isAllZeros - return true if the array is empty or all zeros.
|
|
static bool isAllZeros(StringRef Arr) {
|
|
for (StringRef::iterator I = Arr.begin(), E = Arr.end(); I != E; ++I)
|
|
if (*I != 0)
|
|
return false;
|
|
return true;
|
|
}
|
|
|
|
/// getImpl - This is the underlying implementation of all of the
|
|
/// ConstantDataSequential::get methods. They all thunk down to here, providing
|
|
/// the correct element type. We take the bytes in as a StringRef because
|
|
/// we *want* an underlying "char*" to avoid TBAA type punning violations.
|
|
Constant *ConstantDataSequential::getImpl(StringRef Elements, Type *Ty) {
|
|
assert(isElementTypeCompatible(Ty->getSequentialElementType()));
|
|
// If the elements are all zero or there are no elements, return a CAZ, which
|
|
// is more dense and canonical.
|
|
if (isAllZeros(Elements))
|
|
return ConstantAggregateZero::get(Ty);
|
|
|
|
// Do a lookup to see if we have already formed one of these.
|
|
auto &Slot =
|
|
*Ty->getContext()
|
|
.pImpl->CDSConstants.insert(std::make_pair(Elements, nullptr))
|
|
.first;
|
|
|
|
// The bucket can point to a linked list of different CDS's that have the same
|
|
// body but different types. For example, 0,0,0,1 could be a 4 element array
|
|
// of i8, or a 1-element array of i32. They'll both end up in the same
|
|
/// StringMap bucket, linked up by their Next pointers. Walk the list.
|
|
ConstantDataSequential **Entry = &Slot.second;
|
|
for (ConstantDataSequential *Node = *Entry; Node;
|
|
Entry = &Node->Next, Node = *Entry)
|
|
if (Node->getType() == Ty)
|
|
return Node;
|
|
|
|
// Okay, we didn't get a hit. Create a node of the right class, link it in,
|
|
// and return it.
|
|
if (isa<ArrayType>(Ty))
|
|
return *Entry = new ConstantDataArray(Ty, Slot.first().data());
|
|
|
|
assert(isa<VectorType>(Ty));
|
|
return *Entry = new ConstantDataVector(Ty, Slot.first().data());
|
|
}
|
|
|
|
void ConstantDataSequential::destroyConstant() {
|
|
// Remove the constant from the StringMap.
|
|
StringMap<ConstantDataSequential*> &CDSConstants =
|
|
getType()->getContext().pImpl->CDSConstants;
|
|
|
|
StringMap<ConstantDataSequential*>::iterator Slot =
|
|
CDSConstants.find(getRawDataValues());
|
|
|
|
assert(Slot != CDSConstants.end() && "CDS not found in uniquing table");
|
|
|
|
ConstantDataSequential **Entry = &Slot->getValue();
|
|
|
|
// Remove the entry from the hash table.
|
|
if (!(*Entry)->Next) {
|
|
// If there is only one value in the bucket (common case) it must be this
|
|
// entry, and removing the entry should remove the bucket completely.
|
|
assert((*Entry) == this && "Hash mismatch in ConstantDataSequential");
|
|
getContext().pImpl->CDSConstants.erase(Slot);
|
|
} else {
|
|
// Otherwise, there are multiple entries linked off the bucket, unlink the
|
|
// node we care about but keep the bucket around.
|
|
for (ConstantDataSequential *Node = *Entry; ;
|
|
Entry = &Node->Next, Node = *Entry) {
|
|
assert(Node && "Didn't find entry in its uniquing hash table!");
|
|
// If we found our entry, unlink it from the list and we're done.
|
|
if (Node == this) {
|
|
*Entry = Node->Next;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
// If we were part of a list, make sure that we don't delete the list that is
|
|
// still owned by the uniquing map.
|
|
Next = nullptr;
|
|
|
|
// Finally, actually delete it.
|
|
destroyConstantImpl();
|
|
}
|
|
|
|
/// get() constructors - Return a constant with array type with an element
|
|
/// count and element type matching the ArrayRef passed in. Note that this
|
|
/// can return a ConstantAggregateZero object.
|
|
Constant *ConstantDataArray::get(LLVMContext &Context, ArrayRef<uint8_t> Elts) {
|
|
Type *Ty = ArrayType::get(Type::getInt8Ty(Context), Elts.size());
|
|
const char *Data = reinterpret_cast<const char *>(Elts.data());
|
|
return getImpl(StringRef(const_cast<char *>(Data), Elts.size()*1), Ty);
|
|
}
|
|
Constant *ConstantDataArray::get(LLVMContext &Context, ArrayRef<uint16_t> Elts){
|
|
Type *Ty = ArrayType::get(Type::getInt16Ty(Context), Elts.size());
|
|
const char *Data = reinterpret_cast<const char *>(Elts.data());
|
|
return getImpl(StringRef(const_cast<char *>(Data), Elts.size()*2), Ty);
|
|
}
|
|
Constant *ConstantDataArray::get(LLVMContext &Context, ArrayRef<uint32_t> Elts){
|
|
Type *Ty = ArrayType::get(Type::getInt32Ty(Context), Elts.size());
|
|
const char *Data = reinterpret_cast<const char *>(Elts.data());
|
|
return getImpl(StringRef(const_cast<char *>(Data), Elts.size()*4), Ty);
|
|
}
|
|
Constant *ConstantDataArray::get(LLVMContext &Context, ArrayRef<uint64_t> Elts){
|
|
Type *Ty = ArrayType::get(Type::getInt64Ty(Context), Elts.size());
|
|
const char *Data = reinterpret_cast<const char *>(Elts.data());
|
|
return getImpl(StringRef(const_cast<char *>(Data), Elts.size()*8), Ty);
|
|
}
|
|
Constant *ConstantDataArray::get(LLVMContext &Context, ArrayRef<float> Elts) {
|
|
Type *Ty = ArrayType::get(Type::getFloatTy(Context), Elts.size());
|
|
const char *Data = reinterpret_cast<const char *>(Elts.data());
|
|
return getImpl(StringRef(const_cast<char *>(Data), Elts.size()*4), Ty);
|
|
}
|
|
Constant *ConstantDataArray::get(LLVMContext &Context, ArrayRef<double> Elts) {
|
|
Type *Ty = ArrayType::get(Type::getDoubleTy(Context), Elts.size());
|
|
const char *Data = reinterpret_cast<const char *>(Elts.data());
|
|
return getImpl(StringRef(const_cast<char *>(Data), Elts.size() * 8), Ty);
|
|
}
|
|
|
|
/// getFP() constructors - Return a constant with array type with an element
|
|
/// count and element type of float with precision matching the number of
|
|
/// bits in the ArrayRef passed in. (i.e. half for 16bits, float for 32bits,
|
|
/// double for 64bits) Note that this can return a ConstantAggregateZero
|
|
/// object.
|
|
Constant *ConstantDataArray::getFP(LLVMContext &Context,
|
|
ArrayRef<uint16_t> Elts) {
|
|
Type *Ty = VectorType::get(Type::getHalfTy(Context), Elts.size());
|
|
const char *Data = reinterpret_cast<const char *>(Elts.data());
|
|
return getImpl(StringRef(const_cast<char *>(Data), Elts.size() * 2), Ty);
|
|
}
|
|
Constant *ConstantDataArray::getFP(LLVMContext &Context,
|
|
ArrayRef<uint32_t> Elts) {
|
|
Type *Ty = ArrayType::get(Type::getFloatTy(Context), Elts.size());
|
|
const char *Data = reinterpret_cast<const char *>(Elts.data());
|
|
return getImpl(StringRef(const_cast<char *>(Data), Elts.size() * 4), Ty);
|
|
}
|
|
Constant *ConstantDataArray::getFP(LLVMContext &Context,
|
|
ArrayRef<uint64_t> Elts) {
|
|
Type *Ty = ArrayType::get(Type::getDoubleTy(Context), Elts.size());
|
|
const char *Data = reinterpret_cast<const char *>(Elts.data());
|
|
return getImpl(StringRef(const_cast<char *>(Data), Elts.size() * 8), Ty);
|
|
}
|
|
|
|
/// getString - This method constructs a CDS and initializes it with a text
|
|
/// string. The default behavior (AddNull==true) causes a null terminator to
|
|
/// be placed at the end of the array (increasing the length of the string by
|
|
/// one more than the StringRef would normally indicate. Pass AddNull=false
|
|
/// to disable this behavior.
|
|
Constant *ConstantDataArray::getString(LLVMContext &Context,
|
|
StringRef Str, bool AddNull) {
|
|
if (!AddNull) {
|
|
const uint8_t *Data = reinterpret_cast<const uint8_t *>(Str.data());
|
|
return get(Context, makeArrayRef(const_cast<uint8_t *>(Data),
|
|
Str.size()));
|
|
}
|
|
|
|
SmallVector<uint8_t, 64> ElementVals;
|
|
ElementVals.append(Str.begin(), Str.end());
|
|
ElementVals.push_back(0);
|
|
return get(Context, ElementVals);
|
|
}
|
|
|
|
/// get() constructors - Return a constant with vector type with an element
|
|
/// count and element type matching the ArrayRef passed in. Note that this
|
|
/// can return a ConstantAggregateZero object.
|
|
Constant *ConstantDataVector::get(LLVMContext &Context, ArrayRef<uint8_t> Elts){
|
|
Type *Ty = VectorType::get(Type::getInt8Ty(Context), Elts.size());
|
|
const char *Data = reinterpret_cast<const char *>(Elts.data());
|
|
return getImpl(StringRef(const_cast<char *>(Data), Elts.size()*1), Ty);
|
|
}
|
|
Constant *ConstantDataVector::get(LLVMContext &Context, ArrayRef<uint16_t> Elts){
|
|
Type *Ty = VectorType::get(Type::getInt16Ty(Context), Elts.size());
|
|
const char *Data = reinterpret_cast<const char *>(Elts.data());
|
|
return getImpl(StringRef(const_cast<char *>(Data), Elts.size()*2), Ty);
|
|
}
|
|
Constant *ConstantDataVector::get(LLVMContext &Context, ArrayRef<uint32_t> Elts){
|
|
Type *Ty = VectorType::get(Type::getInt32Ty(Context), Elts.size());
|
|
const char *Data = reinterpret_cast<const char *>(Elts.data());
|
|
return getImpl(StringRef(const_cast<char *>(Data), Elts.size()*4), Ty);
|
|
}
|
|
Constant *ConstantDataVector::get(LLVMContext &Context, ArrayRef<uint64_t> Elts){
|
|
Type *Ty = VectorType::get(Type::getInt64Ty(Context), Elts.size());
|
|
const char *Data = reinterpret_cast<const char *>(Elts.data());
|
|
return getImpl(StringRef(const_cast<char *>(Data), Elts.size()*8), Ty);
|
|
}
|
|
Constant *ConstantDataVector::get(LLVMContext &Context, ArrayRef<float> Elts) {
|
|
Type *Ty = VectorType::get(Type::getFloatTy(Context), Elts.size());
|
|
const char *Data = reinterpret_cast<const char *>(Elts.data());
|
|
return getImpl(StringRef(const_cast<char *>(Data), Elts.size()*4), Ty);
|
|
}
|
|
Constant *ConstantDataVector::get(LLVMContext &Context, ArrayRef<double> Elts) {
|
|
Type *Ty = VectorType::get(Type::getDoubleTy(Context), Elts.size());
|
|
const char *Data = reinterpret_cast<const char *>(Elts.data());
|
|
return getImpl(StringRef(const_cast<char *>(Data), Elts.size() * 8), Ty);
|
|
}
|
|
|
|
/// getFP() constructors - Return a constant with vector type with an element
|
|
/// count and element type of float with the precision matching the number of
|
|
/// bits in the ArrayRef passed in. (i.e. half for 16bits, float for 32bits,
|
|
/// double for 64bits) Note that this can return a ConstantAggregateZero
|
|
/// object.
|
|
Constant *ConstantDataVector::getFP(LLVMContext &Context,
|
|
ArrayRef<uint16_t> Elts) {
|
|
Type *Ty = VectorType::get(Type::getHalfTy(Context), Elts.size());
|
|
const char *Data = reinterpret_cast<const char *>(Elts.data());
|
|
return getImpl(StringRef(const_cast<char *>(Data), Elts.size() * 2), Ty);
|
|
}
|
|
Constant *ConstantDataVector::getFP(LLVMContext &Context,
|
|
ArrayRef<uint32_t> Elts) {
|
|
Type *Ty = VectorType::get(Type::getFloatTy(Context), Elts.size());
|
|
const char *Data = reinterpret_cast<const char *>(Elts.data());
|
|
return getImpl(StringRef(const_cast<char *>(Data), Elts.size() * 4), Ty);
|
|
}
|
|
Constant *ConstantDataVector::getFP(LLVMContext &Context,
|
|
ArrayRef<uint64_t> Elts) {
|
|
Type *Ty = VectorType::get(Type::getDoubleTy(Context), Elts.size());
|
|
const char *Data = reinterpret_cast<const char *>(Elts.data());
|
|
return getImpl(StringRef(const_cast<char *>(Data), Elts.size() * 8), Ty);
|
|
}
|
|
|
|
Constant *ConstantDataVector::getSplat(unsigned NumElts, Constant *V) {
|
|
assert(isElementTypeCompatible(V->getType()) &&
|
|
"Element type not compatible with ConstantData");
|
|
if (ConstantInt *CI = dyn_cast<ConstantInt>(V)) {
|
|
if (CI->getType()->isIntegerTy(8)) {
|
|
SmallVector<uint8_t, 16> Elts(NumElts, CI->getZExtValue());
|
|
return get(V->getContext(), Elts);
|
|
}
|
|
if (CI->getType()->isIntegerTy(16)) {
|
|
SmallVector<uint16_t, 16> Elts(NumElts, CI->getZExtValue());
|
|
return get(V->getContext(), Elts);
|
|
}
|
|
if (CI->getType()->isIntegerTy(32)) {
|
|
SmallVector<uint32_t, 16> Elts(NumElts, CI->getZExtValue());
|
|
return get(V->getContext(), Elts);
|
|
}
|
|
assert(CI->getType()->isIntegerTy(64) && "Unsupported ConstantData type");
|
|
SmallVector<uint64_t, 16> Elts(NumElts, CI->getZExtValue());
|
|
return get(V->getContext(), Elts);
|
|
}
|
|
|
|
if (ConstantFP *CFP = dyn_cast<ConstantFP>(V)) {
|
|
if (CFP->getType()->isFloatTy()) {
|
|
SmallVector<uint32_t, 16> Elts(
|
|
NumElts, CFP->getValueAPF().bitcastToAPInt().getLimitedValue());
|
|
return getFP(V->getContext(), Elts);
|
|
}
|
|
if (CFP->getType()->isDoubleTy()) {
|
|
SmallVector<uint64_t, 16> Elts(
|
|
NumElts, CFP->getValueAPF().bitcastToAPInt().getLimitedValue());
|
|
return getFP(V->getContext(), Elts);
|
|
}
|
|
}
|
|
return ConstantVector::getSplat(NumElts, V);
|
|
}
|
|
|
|
|
|
/// getElementAsInteger - If this is a sequential container of integers (of
|
|
/// any size), return the specified element in the low bits of a uint64_t.
|
|
uint64_t ConstantDataSequential::getElementAsInteger(unsigned Elt) const {
|
|
assert(isa<IntegerType>(getElementType()) &&
|
|
"Accessor can only be used when element is an integer");
|
|
const char *EltPtr = getElementPointer(Elt);
|
|
|
|
// The data is stored in host byte order, make sure to cast back to the right
|
|
// type to load with the right endianness.
|
|
switch (getElementType()->getIntegerBitWidth()) {
|
|
default: llvm_unreachable("Invalid bitwidth for CDS");
|
|
case 8:
|
|
return *const_cast<uint8_t *>(reinterpret_cast<const uint8_t *>(EltPtr));
|
|
case 16:
|
|
return *const_cast<uint16_t *>(reinterpret_cast<const uint16_t *>(EltPtr));
|
|
case 32:
|
|
return *const_cast<uint32_t *>(reinterpret_cast<const uint32_t *>(EltPtr));
|
|
case 64:
|
|
return *const_cast<uint64_t *>(reinterpret_cast<const uint64_t *>(EltPtr));
|
|
}
|
|
}
|
|
|
|
/// getElementAsAPFloat - If this is a sequential container of floating point
|
|
/// type, return the specified element as an APFloat.
|
|
APFloat ConstantDataSequential::getElementAsAPFloat(unsigned Elt) const {
|
|
const char *EltPtr = getElementPointer(Elt);
|
|
|
|
switch (getElementType()->getTypeID()) {
|
|
default:
|
|
llvm_unreachable("Accessor can only be used when element is float/double!");
|
|
case Type::FloatTyID: {
|
|
auto EltVal = *reinterpret_cast<const uint32_t *>(EltPtr);
|
|
return APFloat(APFloat::IEEEsingle, APInt(32, EltVal));
|
|
}
|
|
case Type::DoubleTyID: {
|
|
auto EltVal = *reinterpret_cast<const uint64_t *>(EltPtr);
|
|
return APFloat(APFloat::IEEEdouble, APInt(64, EltVal));
|
|
}
|
|
}
|
|
}
|
|
|
|
/// getElementAsFloat - If this is an sequential container of floats, return
|
|
/// the specified element as a float.
|
|
float ConstantDataSequential::getElementAsFloat(unsigned Elt) const {
|
|
assert(getElementType()->isFloatTy() &&
|
|
"Accessor can only be used when element is a 'float'");
|
|
const float *EltPtr = reinterpret_cast<const float *>(getElementPointer(Elt));
|
|
return *const_cast<float *>(EltPtr);
|
|
}
|
|
|
|
/// getElementAsDouble - If this is an sequential container of doubles, return
|
|
/// the specified element as a float.
|
|
double ConstantDataSequential::getElementAsDouble(unsigned Elt) const {
|
|
assert(getElementType()->isDoubleTy() &&
|
|
"Accessor can only be used when element is a 'float'");
|
|
const double *EltPtr =
|
|
reinterpret_cast<const double *>(getElementPointer(Elt));
|
|
return *const_cast<double *>(EltPtr);
|
|
}
|
|
|
|
/// getElementAsConstant - Return a Constant for a specified index's element.
|
|
/// Note that this has to compute a new constant to return, so it isn't as
|
|
/// efficient as getElementAsInteger/Float/Double.
|
|
Constant *ConstantDataSequential::getElementAsConstant(unsigned Elt) const {
|
|
if (getElementType()->isFloatTy() || getElementType()->isDoubleTy())
|
|
return ConstantFP::get(getContext(), getElementAsAPFloat(Elt));
|
|
|
|
return ConstantInt::get(getElementType(), getElementAsInteger(Elt));
|
|
}
|
|
|
|
/// isString - This method returns true if this is an array of i8.
|
|
bool ConstantDataSequential::isString() const {
|
|
return isa<ArrayType>(getType()) && getElementType()->isIntegerTy(8);
|
|
}
|
|
|
|
/// isCString - This method returns true if the array "isString", ends with a
|
|
/// nul byte, and does not contains any other nul bytes.
|
|
bool ConstantDataSequential::isCString() const {
|
|
if (!isString())
|
|
return false;
|
|
|
|
StringRef Str = getAsString();
|
|
|
|
// The last value must be nul.
|
|
if (Str.back() != 0) return false;
|
|
|
|
// Other elements must be non-nul.
|
|
return Str.drop_back().find(0) == StringRef::npos;
|
|
}
|
|
|
|
/// getSplatValue - If this is a splat constant, meaning that all of the
|
|
/// elements have the same value, return that value. Otherwise return nullptr.
|
|
Constant *ConstantDataVector::getSplatValue() const {
|
|
const char *Base = getRawDataValues().data();
|
|
|
|
// Compare elements 1+ to the 0'th element.
|
|
unsigned EltSize = getElementByteSize();
|
|
for (unsigned i = 1, e = getNumElements(); i != e; ++i)
|
|
if (memcmp(Base, Base+i*EltSize, EltSize))
|
|
return nullptr;
|
|
|
|
// If they're all the same, return the 0th one as a representative.
|
|
return getElementAsConstant(0);
|
|
}
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
// replaceUsesOfWithOnConstant implementations
|
|
|
|
/// replaceUsesOfWithOnConstant - Update this constant array to change uses of
|
|
/// 'From' to be uses of 'To'. This must update the uniquing data structures
|
|
/// etc.
|
|
///
|
|
/// Note that we intentionally replace all uses of From with To here. Consider
|
|
/// a large array that uses 'From' 1000 times. By handling this case all here,
|
|
/// ConstantArray::replaceUsesOfWithOnConstant is only invoked once, and that
|
|
/// single invocation handles all 1000 uses. Handling them one at a time would
|
|
/// work, but would be really slow because it would have to unique each updated
|
|
/// array instance.
|
|
///
|
|
void Constant::replaceUsesOfWithOnConstantImpl(Constant *Replacement) {
|
|
// I do need to replace this with an existing value.
|
|
assert(Replacement != this && "I didn't contain From!");
|
|
|
|
// Everyone using this now uses the replacement.
|
|
replaceAllUsesWith(Replacement);
|
|
|
|
// Delete the old constant!
|
|
destroyConstant();
|
|
}
|
|
|
|
void ConstantArray::replaceUsesOfWithOnConstant(Value *From, Value *To,
|
|
Use *U) {
|
|
assert(isa<Constant>(To) && "Cannot make Constant refer to non-constant!");
|
|
Constant *ToC = cast<Constant>(To);
|
|
|
|
SmallVector<Constant*, 8> Values;
|
|
Values.reserve(getNumOperands()); // Build replacement array.
|
|
|
|
// Fill values with the modified operands of the constant array. Also,
|
|
// compute whether this turns into an all-zeros array.
|
|
unsigned NumUpdated = 0;
|
|
|
|
// Keep track of whether all the values in the array are "ToC".
|
|
bool AllSame = true;
|
|
for (Use *O = OperandList, *E = OperandList+getNumOperands(); O != E; ++O) {
|
|
Constant *Val = cast<Constant>(O->get());
|
|
if (Val == From) {
|
|
Val = ToC;
|
|
++NumUpdated;
|
|
}
|
|
Values.push_back(Val);
|
|
AllSame &= Val == ToC;
|
|
}
|
|
|
|
if (AllSame && ToC->isNullValue()) {
|
|
replaceUsesOfWithOnConstantImpl(ConstantAggregateZero::get(getType()));
|
|
return;
|
|
}
|
|
if (AllSame && isa<UndefValue>(ToC)) {
|
|
replaceUsesOfWithOnConstantImpl(UndefValue::get(getType()));
|
|
return;
|
|
}
|
|
|
|
// Check for any other type of constant-folding.
|
|
if (Constant *C = getImpl(getType(), Values)) {
|
|
replaceUsesOfWithOnConstantImpl(C);
|
|
return;
|
|
}
|
|
|
|
// Update to the new value.
|
|
if (Constant *C = getContext().pImpl->ArrayConstants.replaceOperandsInPlace(
|
|
Values, this, From, ToC, NumUpdated, U - OperandList))
|
|
replaceUsesOfWithOnConstantImpl(C);
|
|
}
|
|
|
|
void ConstantStruct::replaceUsesOfWithOnConstant(Value *From, Value *To,
|
|
Use *U) {
|
|
assert(isa<Constant>(To) && "Cannot make Constant refer to non-constant!");
|
|
Constant *ToC = cast<Constant>(To);
|
|
|
|
unsigned OperandToUpdate = U-OperandList;
|
|
assert(getOperand(OperandToUpdate) == From && "ReplaceAllUsesWith broken!");
|
|
|
|
SmallVector<Constant*, 8> Values;
|
|
Values.reserve(getNumOperands()); // Build replacement struct.
|
|
|
|
// Fill values with the modified operands of the constant struct. Also,
|
|
// compute whether this turns into an all-zeros struct.
|
|
bool isAllZeros = false;
|
|
bool isAllUndef = false;
|
|
if (ToC->isNullValue()) {
|
|
isAllZeros = true;
|
|
for (Use *O = OperandList, *E = OperandList+getNumOperands(); O != E; ++O) {
|
|
Constant *Val = cast<Constant>(O->get());
|
|
Values.push_back(Val);
|
|
if (isAllZeros) isAllZeros = Val->isNullValue();
|
|
}
|
|
} else if (isa<UndefValue>(ToC)) {
|
|
isAllUndef = true;
|
|
for (Use *O = OperandList, *E = OperandList+getNumOperands(); O != E; ++O) {
|
|
Constant *Val = cast<Constant>(O->get());
|
|
Values.push_back(Val);
|
|
if (isAllUndef) isAllUndef = isa<UndefValue>(Val);
|
|
}
|
|
} else {
|
|
for (Use *O = OperandList, *E = OperandList + getNumOperands(); O != E; ++O)
|
|
Values.push_back(cast<Constant>(O->get()));
|
|
}
|
|
Values[OperandToUpdate] = ToC;
|
|
|
|
if (isAllZeros) {
|
|
replaceUsesOfWithOnConstantImpl(ConstantAggregateZero::get(getType()));
|
|
return;
|
|
}
|
|
if (isAllUndef) {
|
|
replaceUsesOfWithOnConstantImpl(UndefValue::get(getType()));
|
|
return;
|
|
}
|
|
|
|
// Update to the new value.
|
|
if (Constant *C = getContext().pImpl->StructConstants.replaceOperandsInPlace(
|
|
Values, this, From, ToC))
|
|
replaceUsesOfWithOnConstantImpl(C);
|
|
}
|
|
|
|
void ConstantVector::replaceUsesOfWithOnConstant(Value *From, Value *To,
|
|
Use *U) {
|
|
assert(isa<Constant>(To) && "Cannot make Constant refer to non-constant!");
|
|
Constant *ToC = cast<Constant>(To);
|
|
|
|
SmallVector<Constant*, 8> Values;
|
|
Values.reserve(getNumOperands()); // Build replacement array...
|
|
unsigned NumUpdated = 0;
|
|
for (unsigned i = 0, e = getNumOperands(); i != e; ++i) {
|
|
Constant *Val = getOperand(i);
|
|
if (Val == From) {
|
|
++NumUpdated;
|
|
Val = ToC;
|
|
}
|
|
Values.push_back(Val);
|
|
}
|
|
|
|
if (Constant *C = getImpl(Values)) {
|
|
replaceUsesOfWithOnConstantImpl(C);
|
|
return;
|
|
}
|
|
|
|
// Update to the new value.
|
|
if (Constant *C = getContext().pImpl->VectorConstants.replaceOperandsInPlace(
|
|
Values, this, From, ToC, NumUpdated, U - OperandList))
|
|
replaceUsesOfWithOnConstantImpl(C);
|
|
}
|
|
|
|
void ConstantExpr::replaceUsesOfWithOnConstant(Value *From, Value *ToV,
|
|
Use *U) {
|
|
assert(isa<Constant>(ToV) && "Cannot make Constant refer to non-constant!");
|
|
Constant *To = cast<Constant>(ToV);
|
|
|
|
SmallVector<Constant*, 8> NewOps;
|
|
unsigned NumUpdated = 0;
|
|
for (unsigned i = 0, e = getNumOperands(); i != e; ++i) {
|
|
Constant *Op = getOperand(i);
|
|
if (Op == From) {
|
|
++NumUpdated;
|
|
Op = To;
|
|
}
|
|
NewOps.push_back(Op);
|
|
}
|
|
assert(NumUpdated && "I didn't contain From!");
|
|
|
|
if (Constant *C = getWithOperands(NewOps, getType(), true)) {
|
|
replaceUsesOfWithOnConstantImpl(C);
|
|
return;
|
|
}
|
|
|
|
// Update to the new value.
|
|
if (Constant *C = getContext().pImpl->ExprConstants.replaceOperandsInPlace(
|
|
NewOps, this, From, To, NumUpdated, U - OperandList))
|
|
replaceUsesOfWithOnConstantImpl(C);
|
|
}
|
|
|
|
Instruction *ConstantExpr::getAsInstruction() {
|
|
SmallVector<Value*,4> ValueOperands;
|
|
for (op_iterator I = op_begin(), E = op_end(); I != E; ++I)
|
|
ValueOperands.push_back(cast<Value>(I));
|
|
|
|
ArrayRef<Value*> Ops(ValueOperands);
|
|
|
|
switch (getOpcode()) {
|
|
case Instruction::Trunc:
|
|
case Instruction::ZExt:
|
|
case Instruction::SExt:
|
|
case Instruction::FPTrunc:
|
|
case Instruction::FPExt:
|
|
case Instruction::UIToFP:
|
|
case Instruction::SIToFP:
|
|
case Instruction::FPToUI:
|
|
case Instruction::FPToSI:
|
|
case Instruction::PtrToInt:
|
|
case Instruction::IntToPtr:
|
|
case Instruction::BitCast:
|
|
case Instruction::AddrSpaceCast:
|
|
return CastInst::Create((Instruction::CastOps)getOpcode(),
|
|
Ops[0], getType());
|
|
case Instruction::Select:
|
|
return SelectInst::Create(Ops[0], Ops[1], Ops[2]);
|
|
case Instruction::InsertElement:
|
|
return InsertElementInst::Create(Ops[0], Ops[1], Ops[2]);
|
|
case Instruction::ExtractElement:
|
|
return ExtractElementInst::Create(Ops[0], Ops[1]);
|
|
case Instruction::InsertValue:
|
|
return InsertValueInst::Create(Ops[0], Ops[1], getIndices());
|
|
case Instruction::ExtractValue:
|
|
return ExtractValueInst::Create(Ops[0], getIndices());
|
|
case Instruction::ShuffleVector:
|
|
return new ShuffleVectorInst(Ops[0], Ops[1], Ops[2]);
|
|
|
|
case Instruction::GetElementPtr:
|
|
if (cast<GEPOperator>(this)->isInBounds())
|
|
return GetElementPtrInst::CreateInBounds(Ops[0], Ops.slice(1));
|
|
else
|
|
return GetElementPtrInst::Create(Ops[0], Ops.slice(1));
|
|
|
|
case Instruction::ICmp:
|
|
case Instruction::FCmp:
|
|
return CmpInst::Create((Instruction::OtherOps)getOpcode(),
|
|
getPredicate(), Ops[0], Ops[1]);
|
|
|
|
default:
|
|
assert(getNumOperands() == 2 && "Must be binary operator?");
|
|
BinaryOperator *BO =
|
|
BinaryOperator::Create((Instruction::BinaryOps)getOpcode(),
|
|
Ops[0], Ops[1]);
|
|
if (isa<OverflowingBinaryOperator>(BO)) {
|
|
BO->setHasNoUnsignedWrap(SubclassOptionalData &
|
|
OverflowingBinaryOperator::NoUnsignedWrap);
|
|
BO->setHasNoSignedWrap(SubclassOptionalData &
|
|
OverflowingBinaryOperator::NoSignedWrap);
|
|
}
|
|
if (isa<PossiblyExactOperator>(BO))
|
|
BO->setIsExact(SubclassOptionalData & PossiblyExactOperator::IsExact);
|
|
return BO;
|
|
}
|
|
}
|