+++ /dev/null
-//===-- Constants.cpp - Implement Constant nodes --------------------------===//
-//
-// The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
-//
-//===----------------------------------------------------------------------===//
-//
-// This file implements the Constant* classes.
-//
-//===----------------------------------------------------------------------===//
-
-#include "llvm/Constants.h"
-#include "ConstantFold.h"
-#include "LLVMContextImpl.h"
-#include "llvm/ADT/DenseMap.h"
-#include "llvm/ADT/FoldingSet.h"
-#include "llvm/ADT/STLExtras.h"
-#include "llvm/ADT/SmallVector.h"
-#include "llvm/ADT/StringExtras.h"
-#include "llvm/ADT/StringMap.h"
-#include "llvm/DerivedTypes.h"
-#include "llvm/GlobalValue.h"
-#include "llvm/Instructions.h"
-#include "llvm/Module.h"
-#include "llvm/Operator.h"
-#include "llvm/Support/Compiler.h"
-#include "llvm/Support/Debug.h"
-#include "llvm/Support/ErrorHandling.h"
-#include "llvm/Support/GetElementPtrTypeIterator.h"
-#include "llvm/Support/ManagedStatic.h"
-#include "llvm/Support/MathExtras.h"
-#include "llvm/Support/raw_ostream.h"
-#include <algorithm>
-#include <cstdarg>
-using namespace llvm;
-
-//===----------------------------------------------------------------------===//
-// Constant Class
-//===----------------------------------------------------------------------===//
-
-void Constant::anchor() { }
-
-bool Constant::isNegativeZeroValue() const {
- // Floating point values have an explicit -0.0 value.
- if (const ConstantFP *CFP = dyn_cast<ConstantFP>(this))
- return CFP->isZero() && CFP->isNegative();
-
- // Otherwise, just use +0.0.
- return isNullValue();
-}
-
-bool Constant::isNullValue() const {
- // 0 is null.
- if (const ConstantInt *CI = dyn_cast<ConstantInt>(this))
- return CI->isZero();
-
- // +0.0 is null.
- if (const ConstantFP *CFP = dyn_cast<ConstantFP>(this))
- return CFP->isZero() && !CFP->isNegative();
-
- // constant zero is zero for aggregates and cpnull is null for pointers.
- return isa<ConstantAggregateZero>(this) || isa<ConstantPointerNull>(this);
-}
-
-bool Constant::isAllOnesValue() const {
- // Check for -1 integers
- if (const ConstantInt *CI = dyn_cast<ConstantInt>(this))
- return CI->isMinusOne();
-
- // Check for FP which are bitcasted from -1 integers
- if (const ConstantFP *CFP = dyn_cast<ConstantFP>(this))
- return CFP->getValueAPF().bitcastToAPInt().isAllOnesValue();
-
- // Check for constant vectors which are splats of -1 values.
- if (const ConstantVector *CV = dyn_cast<ConstantVector>(this))
- if (Constant *Splat = CV->getSplatValue())
- return Splat->isAllOnesValue();
-
- // Check for constant vectors which are splats of -1 values.
- if (const ConstantDataVector *CV = dyn_cast<ConstantDataVector>(this))
- if (Constant *Splat = CV->getSplatValue())
- return Splat->isAllOnesValue();
-
- return false;
-}
-
-// Constructor to create a '0' constant of arbitrary type...
-Constant *Constant::getNullValue(Type *Ty) {
- switch (Ty->getTypeID()) {
- case Type::IntegerTyID:
- return ConstantInt::get(Ty, 0);
- case Type::HalfTyID:
- return ConstantFP::get(Ty->getContext(),
- APFloat::getZero(APFloat::IEEEhalf));
- case Type::FloatTyID:
- return ConstantFP::get(Ty->getContext(),
- APFloat::getZero(APFloat::IEEEsingle));
- case Type::DoubleTyID:
- return ConstantFP::get(Ty->getContext(),
- APFloat::getZero(APFloat::IEEEdouble));
- case Type::X86_FP80TyID:
- return ConstantFP::get(Ty->getContext(),
- APFloat::getZero(APFloat::x87DoubleExtended));
- case Type::FP128TyID:
- return ConstantFP::get(Ty->getContext(),
- APFloat::getZero(APFloat::IEEEquad));
- case Type::PPC_FP128TyID:
- return ConstantFP::get(Ty->getContext(),
- APFloat(APInt::getNullValue(128)));
- case Type::PointerTyID:
- return ConstantPointerNull::get(cast<PointerType>(Ty));
- case Type::StructTyID:
- case Type::ArrayTyID:
- case Type::VectorTyID:
- return ConstantAggregateZero::get(Ty);
- default:
- // Function, Label, or Opaque type?
- llvm_unreachable("Cannot create a null constant of that type!");
- }
-}
-
-Constant *Constant::getIntegerValue(Type *Ty, const APInt &V) {
- Type *ScalarTy = Ty->getScalarType();
-
- // Create the base integer constant.
- Constant *C = ConstantInt::get(Ty->getContext(), V);
-
- // Convert an integer to a pointer, if necessary.
- if (PointerType *PTy = dyn_cast<PointerType>(ScalarTy))
- C = ConstantExpr::getIntToPtr(C, PTy);
-
- // Broadcast a scalar to a vector, if necessary.
- if (VectorType *VTy = dyn_cast<VectorType>(Ty))
- C = ConstantVector::getSplat(VTy->getNumElements(), C);
-
- return C;
-}
-
-Constant *Constant::getAllOnesValue(Type *Ty) {
- if (IntegerType *ITy = dyn_cast<IntegerType>(Ty))
- return ConstantInt::get(Ty->getContext(),
- APInt::getAllOnesValue(ITy->getBitWidth()));
-
- if (Ty->isFloatingPointTy()) {
- APFloat FL = APFloat::getAllOnesValue(Ty->getPrimitiveSizeInBits(),
- !Ty->isPPC_FP128Ty());
- return ConstantFP::get(Ty->getContext(), FL);
- }
-
- VectorType *VTy = cast<VectorType>(Ty);
- return ConstantVector::getSplat(VTy->getNumElements(),
- getAllOnesValue(VTy->getElementType()));
-}
-
-/// getAggregateElement - For aggregates (struct/array/vector) return the
-/// constant that corresponds to the specified element if possible, or null if
-/// not. This can return null if the element index is a ConstantExpr, or if
-/// 'this' is a constant expr.
-Constant *Constant::getAggregateElement(unsigned Elt) const {
- if (const ConstantStruct *CS = dyn_cast<ConstantStruct>(this))
- return Elt < CS->getNumOperands() ? CS->getOperand(Elt) : 0;
-
- if (const ConstantArray *CA = dyn_cast<ConstantArray>(this))
- return Elt < CA->getNumOperands() ? CA->getOperand(Elt) : 0;
-
- if (const ConstantVector *CV = dyn_cast<ConstantVector>(this))
- return Elt < CV->getNumOperands() ? CV->getOperand(Elt) : 0;
-
- if (const ConstantAggregateZero *CAZ =dyn_cast<ConstantAggregateZero>(this))
- return CAZ->getElementValue(Elt);
-
- if (const UndefValue *UV = dyn_cast<UndefValue>(this))
- return UV->getElementValue(Elt);
-
- if (const ConstantDataSequential *CDS =dyn_cast<ConstantDataSequential>(this))
- return Elt < CDS->getNumElements() ? CDS->getElementAsConstant(Elt) : 0;
- return 0;
-}
-
-Constant *Constant::getAggregateElement(Constant *Elt) const {
- assert(isa<IntegerType>(Elt->getType()) && "Index must be an integer");
- if (ConstantInt *CI = dyn_cast<ConstantInt>(Elt))
- return getAggregateElement(CI->getZExtValue());
- return 0;
-}
-
-
-void Constant::destroyConstantImpl() {
- // When a Constant is destroyed, there may be lingering
- // references to the constant by other constants in the constant pool. These
- // constants are implicitly dependent on the module that is being deleted,
- // but they don't know that. Because we only find out when the CPV is
- // deleted, we must now notify all of our users (that should only be
- // Constants) that they are, in fact, invalid now and should be deleted.
- //
- while (!use_empty()) {
- Value *V = use_back();
-#ifndef NDEBUG // Only in -g mode...
- if (!isa<Constant>(V)) {
- dbgs() << "While deleting: " << *this
- << "\n\nUse still stuck around after Def is destroyed: "
- << *V << "\n\n";
- }
-#endif
- assert(isa<Constant>(V) && "References remain to Constant being destroyed");
- cast<Constant>(V)->destroyConstant();
-
- // The constant should remove itself from our use list...
- assert((use_empty() || use_back() != V) && "Constant not removed!");
- }
-
- // Value has no outstanding references it is safe to delete it now...
- delete this;
-}
-
-/// canTrap - Return true if evaluation of this constant could trap. This is
-/// true for things like constant expressions that could divide by zero.
-bool Constant::canTrap() const {
- assert(getType()->isFirstClassType() && "Cannot evaluate aggregate vals!");
- // The only thing that could possibly trap are constant exprs.
- const ConstantExpr *CE = dyn_cast<ConstantExpr>(this);
- if (!CE) return false;
-
- // ConstantExpr traps if any operands can trap.
- for (unsigned i = 0, e = getNumOperands(); i != e; ++i)
- if (CE->getOperand(i)->canTrap())
- return true;
-
- // Otherwise, only specific operations can trap.
- switch (CE->getOpcode()) {
- default:
- return false;
- case Instruction::UDiv:
- case Instruction::SDiv:
- case Instruction::FDiv:
- case Instruction::URem:
- case Instruction::SRem:
- case Instruction::FRem:
- // Div and rem can trap if the RHS is not known to be non-zero.
- if (!isa<ConstantInt>(CE->getOperand(1)) ||CE->getOperand(1)->isNullValue())
- return true;
- return false;
- }
-}
-
-/// isThreadDependent - Return true if the value can vary between threads.
-bool Constant::isThreadDependent() const {
- SmallPtrSet<const Constant*, 64> Visited;
- SmallVector<const Constant*, 64> WorkList;
- WorkList.push_back(this);
- Visited.insert(this);
-
- while (!WorkList.empty()) {
- const Constant *C = WorkList.pop_back_val();
-
- if (const GlobalVariable *GV = dyn_cast<GlobalVariable>(C)) {
- if (GV->isThreadLocal())
- return true;
- }
-
- for (unsigned I = 0, E = C->getNumOperands(); I != E; ++I) {
- const Constant *D = dyn_cast<Constant>(C->getOperand(I));
- if (!D)
- continue;
- if (Visited.insert(D))
- WorkList.push_back(D);
- }
- }
-
- return false;
-}
-
-/// isConstantUsed - Return true if the constant has users other than constant
-/// exprs and other dangling things.
-bool Constant::isConstantUsed() const {
- for (const_use_iterator UI = use_begin(), E = use_end(); UI != E; ++UI) {
- const Constant *UC = dyn_cast<Constant>(*UI);
- if (UC == 0 || isa<GlobalValue>(UC))
- return true;
-
- if (UC->isConstantUsed())
- return true;
- }
- return false;
-}
-
-
-
-/// getRelocationInfo - This method classifies the entry according to
-/// whether or not it may generate a relocation entry. This must be
-/// conservative, so if it might codegen to a relocatable entry, it should say
-/// so. The return values are:
-///
-/// NoRelocation: This constant pool entry is guaranteed to never have a
-/// relocation applied to it (because it holds a simple constant like
-/// '4').
-/// LocalRelocation: This entry has relocations, but the entries are
-/// guaranteed to be resolvable by the static linker, so the dynamic
-/// linker will never see them.
-/// GlobalRelocations: This entry may have arbitrary relocations.
-///
-/// FIXME: This really should not be in VMCore.
-Constant::PossibleRelocationsTy Constant::getRelocationInfo() const {
- if (const GlobalValue *GV = dyn_cast<GlobalValue>(this)) {
- if (GV->hasLocalLinkage() || GV->hasHiddenVisibility())
- return LocalRelocation; // Local to this file/library.
- return GlobalRelocations; // Global reference.
- }
-
- if (const BlockAddress *BA = dyn_cast<BlockAddress>(this))
- return BA->getFunction()->getRelocationInfo();
-
- // While raw uses of blockaddress need to be relocated, differences between
- // two of them don't when they are for labels in the same function. This is a
- // common idiom when creating a table for the indirect goto extension, so we
- // handle it efficiently here.
- if (const ConstantExpr *CE = dyn_cast<ConstantExpr>(this))
- if (CE->getOpcode() == Instruction::Sub) {
- ConstantExpr *LHS = dyn_cast<ConstantExpr>(CE->getOperand(0));
- ConstantExpr *RHS = dyn_cast<ConstantExpr>(CE->getOperand(1));
- if (LHS && RHS &&
- LHS->getOpcode() == Instruction::PtrToInt &&
- RHS->getOpcode() == Instruction::PtrToInt &&
- isa<BlockAddress>(LHS->getOperand(0)) &&
- isa<BlockAddress>(RHS->getOperand(0)) &&
- cast<BlockAddress>(LHS->getOperand(0))->getFunction() ==
- cast<BlockAddress>(RHS->getOperand(0))->getFunction())
- return NoRelocation;
- }
-
- PossibleRelocationsTy Result = NoRelocation;
- for (unsigned i = 0, e = getNumOperands(); i != e; ++i)
- Result = std::max(Result,
- cast<Constant>(getOperand(i))->getRelocationInfo());
-
- return Result;
-}
-
-/// removeDeadUsersOfConstant - If the specified constantexpr is dead, remove
-/// it. This involves recursively eliminating any dead users of the
-/// constantexpr.
-static bool removeDeadUsersOfConstant(const Constant *C) {
- if (isa<GlobalValue>(C)) return false; // Cannot remove this
-
- while (!C->use_empty()) {
- const Constant *User = dyn_cast<Constant>(C->use_back());
- if (!User) return false; // Non-constant usage;
- if (!removeDeadUsersOfConstant(User))
- return false; // Constant wasn't dead
- }
-
- const_cast<Constant*>(C)->destroyConstant();
- return true;
-}
-
-
-/// removeDeadConstantUsers - If there are any dead constant users dangling
-/// off of this constant, remove them. This method is useful for clients
-/// that want to check to see if a global is unused, but don't want to deal
-/// with potentially dead constants hanging off of the globals.
-void Constant::removeDeadConstantUsers() const {
- Value::const_use_iterator I = use_begin(), E = use_end();
- Value::const_use_iterator LastNonDeadUser = E;
- while (I != E) {
- const Constant *User = dyn_cast<Constant>(*I);
- if (User == 0) {
- 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 = use_begin();
- if (I == E) break;
- } else {
- I = LastNonDeadUser;
- ++I;
- }
- }
-}
-
-
-
-//===----------------------------------------------------------------------===//
-// ConstantInt
-//===----------------------------------------------------------------------===//
-
-void ConstantInt::anchor() { }
-
-ConstantInt::ConstantInt(IntegerType *Ty, const APInt& V)
- : Constant(Ty, ConstantIntVal, 0, 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. Note that the value stored in the DenseMap
-// as the key, is a DenseMapAPIntKeyInfo::KeyTy which has provided the
-// operator== and operator!= to ensure that the DenseMap doesn't attempt to
-// compare APInt's of different widths, which would violate an APInt class
-// invariant which generates an assertion.
-ConstantInt *ConstantInt::get(LLVMContext &Context, const APInt &V) {
- // Get the corresponding integer type for the bit width of the value.
- IntegerType *ITy = IntegerType::get(Context, V.getBitWidth());
- // get an existing value or the insertion position
- DenseMapAPIntKeyInfo::KeyTy Key(V, ITy);
- ConstantInt *&Slot = Context.pImpl->IntConstants[Key];
- if (!Slot) Slot = new ConstantInt(ITy, V);
- 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;
-}
-
-
-ConstantFP *ConstantFP::getNegativeZero(Type *Ty) {
- LLVMContext &Context = Ty->getContext();
- APFloat apf = cast<ConstantFP>(Constant::getNullValue(Ty))->getValueAPF();
- apf.changeSign();
- return get(Context, apf);
-}
-
-
-Constant *ConstantFP::getZeroValueForNegation(Type *Ty) {
- Type *ScalarTy = Ty->getScalarType();
- if (ScalarTy->isFloatingPointTy()) {
- Constant *C = getNegativeZero(ScalarTy);
- if (VectorType *VTy = dyn_cast<VectorType>(Ty))
- return ConstantVector::getSplat(VTy->getNumElements(), C);
- return C;
- }
-
- return Constant::getNullValue(Ty);
-}
-
-
-// ConstantFP accessors.
-ConstantFP* ConstantFP::get(LLVMContext &Context, const APFloat& V) {
- DenseMapAPFloatKeyInfo::KeyTy Key(V);
-
- LLVMContextImpl* pImpl = Context.pImpl;
-
- ConstantFP *&Slot = pImpl->FPConstants[Key];
-
- 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;
-}
-
-ConstantFP *ConstantFP::getInfinity(Type *Ty, bool Negative) {
- const fltSemantics &Semantics = *TypeToFloatSemantics(Ty);
- return ConstantFP::get(Ty->getContext(),
- APFloat::getInf(Semantics, Negative));
-}
-
-ConstantFP::ConstantFP(Type *Ty, const APFloat& V)
- : Constant(Ty, ConstantFPVal, 0, 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);
-}
-
-
-//===----------------------------------------------------------------------===//
-// 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);
-}
-
-
-
-//===----------------------------------------------------------------------===//
-// 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) {
- // 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");
- }
- LLVMContextImpl *pImpl = Ty->getContext().pImpl;
-
- // 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<float, 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().convertToFloat());
- else
- break;
- if (Elts.size() == V.size())
- return ConstantDataArray::get(C->getContext(), Elts);
- } else if (CFP->getType()->isDoubleTy()) {
- SmallVector<double, 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().convertToDouble());
- else
- break;
- if (Elts.size() == V.size())
- return ConstantDataArray::get(C->getContext(), Elts);
- }
- }
- }
-
- // Otherwise, we really do want to create a ConstantArray.
- return pImpl->ArrayConstants.getOrCreate(Ty, V);
-}
-
-/// 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) {
- assert(!V.empty() && "Vectors can't be empty");
- VectorType *T = VectorType::get(V.front()->getType(), V.size());
- LLVMContextImpl *pImpl = T->getContext().pImpl;
-
- // 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<float, 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().convertToFloat());
- else
- break;
- if (Elts.size() == V.size())
- return ConstantDataVector::get(C->getContext(), Elts);
- } else if (CFP->getType()->isDoubleTy()) {
- SmallVector<double, 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().convertToDouble());
- else
- break;
- if (Elts.size() == V.size())
- return ConstantDataVector::get(C->getContext(), Elts);
- }
- }
- }
-
- // Otherwise, the element type isn't compatible with ConstantDataVector, or
- // the operand list constants a ConstantExpr or something else strange.
- return pImpl->VectorConstants.getOrCreate(T, V);
-}
-
-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 = llvm::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) 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);
-
- 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:
- return ConstantExpr::getCast(getOpcode(), Ops[0], Ty);
- case Instruction::Select:
- return ConstantExpr::getSelect(Ops[0], Ops[1], Ops[2]);
- case Instruction::InsertElement:
- return ConstantExpr::getInsertElement(Ops[0], Ops[1], Ops[2]);
- case Instruction::ExtractElement:
- return ConstantExpr::getExtractElement(Ops[0], Ops[1]);
- case Instruction::InsertValue:
- return ConstantExpr::getInsertValue(Ops[0], Ops[1], getIndices());
- case Instruction::ExtractValue:
- return ConstantExpr::getExtractValue(Ops[0], getIndices());
- case Instruction::ShuffleVector:
- return ConstantExpr::getShuffleVector(Ops[0], Ops[1], Ops[2]);
- case Instruction::GetElementPtr:
- return ConstantExpr::getGetElementPtr(Ops[0], Ops.slice(1),
- cast<GEPOperator>(this)->isInBounds());
- case Instruction::ICmp:
- case Instruction::FCmp:
- return ConstantExpr::getCompare(getPredicate(), Ops[0], Ops[1]);
- default:
- assert(getNumOperands() == 2 && "Must be binary operator?");
- return ConstantExpr::get(getOpcode(), Ops[0], Ops[1], SubclassOptionalData);
- }
-}
-
-
-//===----------------------------------------------------------------------===//
-// 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 == 0)
- 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 0;
-}
-
-/// 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 0;
- 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 == 0)
- 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 == 0)
- 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() != 0 && "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 == 0)
- 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);
-}
-
-
-// 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);
- 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 == 0) {
- 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);
- return;
- }
-
- // Otherwise, I do need to replace this with an existing value.
- assert(NewBA != this && "I didn't contain From!");
-
- // Everyone using this now uses the replacement.
- replaceAllUsesWith(NewBA);
-
- destroyConstant();
-}
-
-//---- 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 inline Constant *getFoldedCast(
- Instruction::CastOps opc, Constant *C, Type *Ty) {
- assert(Ty->isFirstClassType() && "Cannot cast to an aggregate type!");
- // Fold a few common cases
- if (Constant *FC = ConstantFoldCastInstruction(opc, C, Ty))
- return FC;
-
- LLVMContextImpl *pImpl = Ty->getContext().pImpl;
-
- // Look up the constant in the table first to ensure uniqueness
- std::vector<Constant*> argVec(1, C);
- ExprMapKeyType Key(opc, argVec);
-
- return pImpl->ExprConstants.getOrCreate(Ty, Key);
-}
-
-Constant *ConstantExpr::getCast(unsigned oc, Constant *C, Type *Ty) {
- 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);
- case Instruction::ZExt: return getZExt(C, Ty);
- case Instruction::SExt: return getSExt(C, Ty);
- case Instruction::FPTrunc: return getFPTrunc(C, Ty);
- case Instruction::FPExt: return getFPExtend(C, Ty);
- case Instruction::UIToFP: return getUIToFP(C, Ty);
- case Instruction::SIToFP: return getSIToFP(C, Ty);
- case Instruction::FPToUI: return getFPToUI(C, Ty);
- case Instruction::FPToSI: return getFPToSI(C, Ty);
- case Instruction::PtrToInt: return getPtrToInt(C, Ty);
- case Instruction::IntToPtr: return getIntToPtr(C, Ty);
- case Instruction::BitCast: return getBitCast(C, Ty);
- }
-}
-
-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()->isPointerTy() && "Invalid cast");
- assert((Ty->isIntegerTy() || Ty->isPointerTy()) && "Invalid cast");
-
- if (Ty->isIntegerTy())
- return getPtrToInt(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) {
-#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);
-}
-
-Constant *ConstantExpr::getSExt(Constant *C, Type *Ty) {
-#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);
-}
-
-Constant *ConstantExpr::getZExt(Constant *C, Type *Ty) {
-#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);
-}
-
-Constant *ConstantExpr::getFPTrunc(Constant *C, Type *Ty) {
-#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);
-}
-
-Constant *ConstantExpr::getFPExtend(Constant *C, Type *Ty) {
-#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);
-}
-
-Constant *ConstantExpr::getUIToFP(Constant *C, Type *Ty) {
-#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);
-}
-
-Constant *ConstantExpr::getSIToFP(Constant *C, Type *Ty) {
-#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);
-}
-
-Constant *ConstantExpr::getFPToUI(Constant *C, Type *Ty) {
-#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);
-}
-
-Constant *ConstantExpr::getFPToSI(Constant *C, Type *Ty) {
-#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);
-}
-
-Constant *ConstantExpr::getPtrToInt(Constant *C, Type *DstTy) {
- 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);
-}
-
-Constant *ConstantExpr::getIntToPtr(Constant *C, Type *DstTy) {
- 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);
-}
-
-Constant *ConstantExpr::getBitCast(Constant *C, Type *DstTy) {
- 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);
-}
-
-Constant *ConstantExpr::get(unsigned Opcode, Constant *C1, Constant *C2,
- unsigned Flags) {
- // 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.
-
- std::vector<Constant*> argVec(1, C1);
- argVec.push_back(C2);
- ExprMapKeyType 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, NULL);
- Constant *NullPtr = Constant::getNullValue(AligningTy->getPointerTo());
- 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) {
- 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);
-
- 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);
- }
-}
-
-Constant *ConstantExpr::getSelect(Constant *C, Constant *V1, Constant *V2) {
- assert(!SelectInst::areInvalidOperands(C, V1, V2)&&"Invalid select operands");
-
- if (Constant *SC = ConstantFoldSelectInstruction(C, V1, V2))
- return SC; // Fold common cases
-
- std::vector<Constant*> argVec(3, C);
- argVec[1] = V1;
- argVec[2] = V2;
- ExprMapKeyType 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) {
- 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());
-
- // 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 ExprMapKeyType 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) {
- 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...
-
- // Look up the constant in the table first to ensure uniqueness
- std::vector<Constant*> ArgVec;
- ArgVec.push_back(LHS);
- ArgVec.push_back(RHS);
- // Get the key type with both the opcode and predicate
- const ExprMapKeyType 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) {
- 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...
-
- // Look up the constant in the table first to ensure uniqueness
- std::vector<Constant*> ArgVec;
- ArgVec.push_back(LHS);
- ArgVec.push_back(RHS);
- // Get the key type with both the opcode and predicate
- const ExprMapKeyType 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) {
- assert(Val->getType()->isVectorTy() &&
- "Tried to create extractelement operation on non-vector type!");
- assert(Idx->getType()->isIntegerTy(32) &&
- "Extractelement index must be i32 type!");
-
- if (Constant *FC = ConstantFoldExtractElementInstruction(Val, Idx))
- return FC; // Fold a few common cases.
-
- // Look up the constant in the table first to ensure uniqueness
- std::vector<Constant*> ArgVec(1, Val);
- ArgVec.push_back(Idx);
- const ExprMapKeyType Key(Instruction::ExtractElement,ArgVec);
-
- LLVMContextImpl *pImpl = Val->getContext().pImpl;
- Type *ReqTy = Val->getType()->getVectorElementType();
- return pImpl->ExprConstants.getOrCreate(ReqTy, Key);
-}
-
-Constant *ConstantExpr::getInsertElement(Constant *Val, Constant *Elt,
- Constant *Idx) {
- 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(32) &&
- "Insertelement index must be i32 type!");
-
- if (Constant *FC = ConstantFoldInsertElementInstruction(Val, Elt, Idx))
- return FC; // Fold a few common cases.
- // Look up the constant in the table first to ensure uniqueness
- std::vector<Constant*> ArgVec(1, Val);
- ArgVec.push_back(Elt);
- ArgVec.push_back(Idx);
- const ExprMapKeyType 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) {
- 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);
-
- // Look up the constant in the table first to ensure uniqueness
- std::vector<Constant*> ArgVec(1, V1);
- ArgVec.push_back(V2);
- ArgVec.push_back(Mask);
- const ExprMapKeyType 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) {
- assert(ExtractValueInst::getIndexedType(Agg->getType(),
- Idxs) == Val->getType() &&
- "insertvalue indices invalid!");
- assert(Agg->getType()->isFirstClassType() &&
- "Non-first-class type for constant insertvalue expression");
- Constant *FC = ConstantFoldInsertValueInstruction(Agg, Val, Idxs);
- assert(FC && "insertvalue constant expr couldn't be folded!");
- return FC;
-}
-
-Constant *ConstantExpr::getExtractValue(Constant *Agg,
- ArrayRef<unsigned> Idxs) {
- 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");
- Constant *FC = ConstantFoldExtractValueInstruction(Agg, Idxs);
- assert(FC && "ExtractValue constant expr couldn't be folded!");
- return FC;
-}
-
-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 0;
-
- 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 0;
-
- 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.
- StringMap<ConstantDataSequential*>::MapEntryTy &Slot =
- Ty->getContext().pImpl->CDSConstants.GetOrCreateValue(Elements);
-
- // 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.getValue();
- for (ConstantDataSequential *Node = *Entry; Node != 0;
- 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.getKeyData());
-
- assert(isa<VectorType>(Ty));
- return *Entry = new ConstantDataVector(Ty, Slot.getKeyData());
-}
-
-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 == 0) {
- // 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 = 0;
-
- // 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);
-}
-
-/// 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, ArrayRef<uint8_t>(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);
-}
-
-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<float, 16> Elts(NumElts, CFP->getValueAPF().convertToFloat());
- return get(V->getContext(), Elts);
- }
- if (CFP->getType()->isDoubleTy()) {
- SmallVector<double, 16> Elts(NumElts,
- CFP->getValueAPF().convertToDouble());
- return get(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: {
- const float *FloatPrt = reinterpret_cast<const float *>(EltPtr);
- return APFloat(*const_cast<float *>(FloatPrt));
- }
- case Type::DoubleTyID: {
- const double *DoublePtr = reinterpret_cast<const double *>(EltPtr);
- return APFloat(*const_cast<double *>(DoublePtr));
- }
- }
-}
-
-/// 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 NULL.
-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 0;
-
- // 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 ConstantArray::replaceUsesOfWithOnConstant(Value *From, Value *To,
- Use *U) {
- assert(isa<Constant>(To) && "Cannot make Constant refer to non-constant!");
- Constant *ToC = cast<Constant>(To);
-
- LLVMContextImpl *pImpl = getType()->getContext().pImpl;
-
- SmallVector<Constant*, 8> Values;
- LLVMContextImpl::ArrayConstantsTy::LookupKey Lookup;
- Lookup.first = cast<ArrayType>(getType());
- 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;
- }
-
- Constant *Replacement = 0;
- if (AllSame && ToC->isNullValue()) {
- Replacement = ConstantAggregateZero::get(getType());
- } else if (AllSame && isa<UndefValue>(ToC)) {
- Replacement = UndefValue::get(getType());
- } else {
- // Check to see if we have this array type already.
- Lookup.second = makeArrayRef(Values);
- LLVMContextImpl::ArrayConstantsTy::MapTy::iterator I =
- pImpl->ArrayConstants.find(Lookup);
-
- if (I != pImpl->ArrayConstants.map_end()) {
- Replacement = I->first;
- } else {
- // Okay, the new shape doesn't exist in the system yet. Instead of
- // creating a new constant array, inserting it, replaceallusesof'ing the
- // old with the new, then deleting the old... just update the current one
- // in place!
- pImpl->ArrayConstants.remove(this);
-
- // Update to the new value. Optimize for the case when we have a single
- // operand that we're changing, but handle bulk updates efficiently.
- if (NumUpdated == 1) {
- unsigned OperandToUpdate = U - OperandList;
- assert(getOperand(OperandToUpdate) == From &&
- "ReplaceAllUsesWith broken!");
- setOperand(OperandToUpdate, ToC);
- } else {
- for (unsigned i = 0, e = getNumOperands(); i != e; ++i)
- if (getOperand(i) == From)
- setOperand(i, ToC);
- }
- pImpl->ArrayConstants.insert(this);
- return;
- }
- }
-
- // Otherwise, 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 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;
- LLVMContextImpl::StructConstantsTy::LookupKey Lookup;
- Lookup.first = cast<StructType>(getType());
- 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;
-
- LLVMContextImpl *pImpl = getContext().pImpl;
-
- Constant *Replacement = 0;
- if (isAllZeros) {
- Replacement = ConstantAggregateZero::get(getType());
- } else if (isAllUndef) {
- Replacement = UndefValue::get(getType());
- } else {
- // Check to see if we have this struct type already.
- Lookup.second = makeArrayRef(Values);
- LLVMContextImpl::StructConstantsTy::MapTy::iterator I =
- pImpl->StructConstants.find(Lookup);
-
- if (I != pImpl->StructConstants.map_end()) {
- Replacement = I->first;
- } else {
- // Okay, the new shape doesn't exist in the system yet. Instead of
- // creating a new constant struct, inserting it, replaceallusesof'ing the
- // old with the new, then deleting the old... just update the current one
- // in place!
- pImpl->StructConstants.remove(this);
-
- // Update to the new value.
- setOperand(OperandToUpdate, ToC);
- pImpl->StructConstants.insert(this);
- return;
- }
- }
-
- assert(Replacement != this && "I didn't contain From!");
-
- // Everyone using this now uses the replacement.
- replaceAllUsesWith(Replacement);
-
- // Delete the old constant!
- destroyConstant();
-}
-
-void ConstantVector::replaceUsesOfWithOnConstant(Value *From, Value *To,
- Use *U) {
- assert(isa<Constant>(To) && "Cannot make Constant refer to non-constant!");
-
- SmallVector<Constant*, 8> Values;
- Values.reserve(getNumOperands()); // Build replacement array...
- for (unsigned i = 0, e = getNumOperands(); i != e; ++i) {
- Constant *Val = getOperand(i);
- if (Val == From) Val = cast<Constant>(To);
- Values.push_back(Val);
- }
-
- Constant *Replacement = get(Values);
- assert(Replacement != this && "I didn't contain From!");
-
- // Everyone using this now uses the replacement.
- replaceAllUsesWith(Replacement);
-
- // Delete the old constant!
- destroyConstant();
-}
-
-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;
- for (unsigned i = 0, e = getNumOperands(); i != e; ++i) {
- Constant *Op = getOperand(i);
- NewOps.push_back(Op == From ? To : Op);
- }
-
- Constant *Replacement = getWithOperands(NewOps);
- assert(Replacement != this && "I didn't contain From!");
-
- // Everyone using this now uses the replacement.
- replaceAllUsesWith(Replacement);
-
- // Delete the old constant!
- destroyConstant();
-}
-
-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:
- 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;
- }
-}
projects / oota-llvm.git / blobdiff