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//===-- Constants.cpp - Implement Constant nodes --------------------------===//
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// The LLVM Compiler Infrastructure
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//===----------------------------------------------------------------------===//
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// This file implements the Constant* classes.
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//===----------------------------------------------------------------------===//
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#include "llvm/Constants.h"
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#include "LLVMContextImpl.h"
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#include "ConstantFold.h"
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#include "llvm/DerivedTypes.h"
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#include "llvm/GlobalValue.h"
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#include "llvm/Instructions.h"
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#include "llvm/Module.h"
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#include "llvm/Operator.h"
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#include "llvm/ADT/FoldingSet.h"
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#include "llvm/ADT/StringExtras.h"
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#include "llvm/ADT/StringMap.h"
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#include "llvm/Support/Compiler.h"
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#include "llvm/Support/Debug.h"
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#include "llvm/Support/ErrorHandling.h"
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#include "llvm/Support/ManagedStatic.h"
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#include "llvm/Support/MathExtras.h"
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#include "llvm/Support/raw_ostream.h"
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#include "llvm/Support/GetElementPtrTypeIterator.h"
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#include "llvm/ADT/DenseMap.h"
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#include "llvm/ADT/SmallVector.h"
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//===----------------------------------------------------------------------===//
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//===----------------------------------------------------------------------===//
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// Constructor to create a '0' constant of arbitrary type...
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static const uint64_t zero[2] = {0, 0};
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Constant *Constant::getNullValue(const Type *Ty) {
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switch (Ty->getTypeID()) {
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case Type::IntegerTyID:
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return ConstantInt::get(Ty, 0);
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return ConstantFP::get(Ty->getContext(), APFloat(APInt(32, 0)));
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case Type::DoubleTyID:
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return ConstantFP::get(Ty->getContext(), APFloat(APInt(64, 0)));
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case Type::X86_FP80TyID:
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return ConstantFP::get(Ty->getContext(), APFloat(APInt(80, 2, zero)));
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return ConstantFP::get(Ty->getContext(),
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APFloat(APInt(128, 2, zero), true));
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case Type::PPC_FP128TyID:
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return ConstantFP::get(Ty->getContext(), APFloat(APInt(128, 2, zero)));
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case Type::PointerTyID:
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return ConstantPointerNull::get(cast<PointerType>(Ty));
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case Type::StructTyID:
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case Type::VectorTyID:
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return ConstantAggregateZero::get(Ty);
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// Function, Label, or Opaque type?
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assert(!"Cannot create a null constant of that type!");
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Constant* Constant::getIntegerValue(const Type *Ty, const APInt &V) {
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const Type *ScalarTy = Ty->getScalarType();
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// Create the base integer constant.
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Constant *C = ConstantInt::get(Ty->getContext(), V);
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// Convert an integer to a pointer, if necessary.
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if (const PointerType *PTy = dyn_cast<PointerType>(ScalarTy))
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C = ConstantExpr::getIntToPtr(C, PTy);
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// Broadcast a scalar to a vector, if necessary.
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if (const VectorType *VTy = dyn_cast<VectorType>(Ty))
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C = ConstantVector::get(std::vector<Constant *>(VTy->getNumElements(), C));
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Constant* Constant::getAllOnesValue(const Type *Ty) {
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if (const IntegerType *ITy = dyn_cast<IntegerType>(Ty))
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return ConstantInt::get(Ty->getContext(),
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APInt::getAllOnesValue(ITy->getBitWidth()));
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std::vector<Constant*> Elts;
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const VectorType *VTy = cast<VectorType>(Ty);
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Elts.resize(VTy->getNumElements(), getAllOnesValue(VTy->getElementType()));
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assert(Elts[0] && "Not a vector integer type!");
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return cast<ConstantVector>(ConstantVector::get(Elts));
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void Constant::destroyConstantImpl() {
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// When a Constant is destroyed, there may be lingering
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// references to the constant by other constants in the constant pool. These
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// constants are implicitly dependent on the module that is being deleted,
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// but they don't know that. Because we only find out when the CPV is
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// deleted, we must now notify all of our users (that should only be
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// Constants) that they are, in fact, invalid now and should be deleted.
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while (!use_empty()) {
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Value *V = use_back();
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#ifndef NDEBUG // Only in -g mode...
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if (!isa<Constant>(V)) {
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dbgs() << "While deleting: " << *this
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<< "\n\nUse still stuck around after Def is destroyed: "
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assert(isa<Constant>(V) && "References remain to Constant being destroyed");
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Constant *CV = cast<Constant>(V);
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CV->destroyConstant();
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// The constant should remove itself from our use list...
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assert((use_empty() || use_back() != V) && "Constant not removed!");
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// Value has no outstanding references it is safe to delete it now...
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/// canTrap - Return true if evaluation of this constant could trap. This is
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/// true for things like constant expressions that could divide by zero.
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bool Constant::canTrap() const {
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assert(getType()->isFirstClassType() && "Cannot evaluate aggregate vals!");
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// The only thing that could possibly trap are constant exprs.
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const ConstantExpr *CE = dyn_cast<ConstantExpr>(this);
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if (!CE) return false;
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// ConstantExpr traps if any operands can trap.
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for (unsigned i = 0, e = getNumOperands(); i != e; ++i)
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if (CE->getOperand(i)->canTrap())
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// Otherwise, only specific operations can trap.
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switch (CE->getOpcode()) {
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case Instruction::UDiv:
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case Instruction::SDiv:
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case Instruction::FDiv:
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case Instruction::URem:
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case Instruction::SRem:
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case Instruction::FRem:
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// Div and rem can trap if the RHS is not known to be non-zero.
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if (!isa<ConstantInt>(CE->getOperand(1)) ||CE->getOperand(1)->isNullValue())
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/// isConstantUsed - Return true if the constant has users other than constant
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/// exprs and other dangling things.
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bool Constant::isConstantUsed() const {
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for (use_const_iterator UI = use_begin(), E = use_end(); UI != E; ++UI) {
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const Constant *UC = dyn_cast<Constant>(*UI);
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if (UC == 0 || isa<GlobalValue>(UC))
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if (UC->isConstantUsed())
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/// getRelocationInfo - This method classifies the entry according to
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/// whether or not it may generate a relocation entry. This must be
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/// conservative, so if it might codegen to a relocatable entry, it should say
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/// so. The return values are:
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/// NoRelocation: This constant pool entry is guaranteed to never have a
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/// relocation applied to it (because it holds a simple constant like
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/// LocalRelocation: This entry has relocations, but the entries are
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/// guaranteed to be resolvable by the static linker, so the dynamic
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/// linker will never see them.
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/// GlobalRelocations: This entry may have arbitrary relocations.
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/// FIXME: This really should not be in VMCore.
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Constant::PossibleRelocationsTy Constant::getRelocationInfo() const {
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if (const GlobalValue *GV = dyn_cast<GlobalValue>(this)) {
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if (GV->hasLocalLinkage() || GV->hasHiddenVisibility())
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return LocalRelocation; // Local to this file/library.
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return GlobalRelocations; // Global reference.
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if (const BlockAddress *BA = dyn_cast<BlockAddress>(this))
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return BA->getFunction()->getRelocationInfo();
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// While raw uses of blockaddress need to be relocated, differences between
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// two of them don't when they are for labels in the same function. This is a
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// common idiom when creating a table for the indirect goto extension, so we
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// handle it efficiently here.
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if (const ConstantExpr *CE = dyn_cast<ConstantExpr>(this))
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if (CE->getOpcode() == Instruction::Sub) {
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ConstantExpr *LHS = dyn_cast<ConstantExpr>(CE->getOperand(0));
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ConstantExpr *RHS = dyn_cast<ConstantExpr>(CE->getOperand(1));
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LHS->getOpcode() == Instruction::PtrToInt &&
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RHS->getOpcode() == Instruction::PtrToInt &&
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isa<BlockAddress>(LHS->getOperand(0)) &&
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isa<BlockAddress>(RHS->getOperand(0)) &&
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cast<BlockAddress>(LHS->getOperand(0))->getFunction() ==
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cast<BlockAddress>(RHS->getOperand(0))->getFunction())
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PossibleRelocationsTy Result = NoRelocation;
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for (unsigned i = 0, e = getNumOperands(); i != e; ++i)
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Result = std::max(Result,
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cast<Constant>(getOperand(i))->getRelocationInfo());
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/// getVectorElements - This method, which is only valid on constant of vector
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/// type, returns the elements of the vector in the specified smallvector.
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/// This handles breaking down a vector undef into undef elements, etc. For
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/// constant exprs and other cases we can't handle, we return an empty vector.
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void Constant::getVectorElements(SmallVectorImpl<Constant*> &Elts) const {
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assert(getType()->isVectorTy() && "Not a vector constant!");
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if (const ConstantVector *CV = dyn_cast<ConstantVector>(this)) {
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for (unsigned i = 0, e = CV->getNumOperands(); i != e; ++i)
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Elts.push_back(CV->getOperand(i));
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const VectorType *VT = cast<VectorType>(getType());
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if (isa<ConstantAggregateZero>(this)) {
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Elts.assign(VT->getNumElements(),
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Constant::getNullValue(VT->getElementType()));
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if (isa<UndefValue>(this)) {
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Elts.assign(VT->getNumElements(), UndefValue::get(VT->getElementType()));
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// Unknown type, must be constant expr etc.
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//===----------------------------------------------------------------------===//
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//===----------------------------------------------------------------------===//
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ConstantInt::ConstantInt(const IntegerType *Ty, const APInt& V)
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: Constant(Ty, ConstantIntVal, 0, 0), Val(V) {
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assert(V.getBitWidth() == Ty->getBitWidth() && "Invalid constant for type");
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ConstantInt* ConstantInt::getTrue(LLVMContext &Context) {
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LLVMContextImpl *pImpl = Context.pImpl;
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if (pImpl->TheTrueVal)
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return pImpl->TheTrueVal;
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return (pImpl->TheTrueVal =
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ConstantInt::get(IntegerType::get(Context, 1), 1));
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ConstantInt* ConstantInt::getFalse(LLVMContext &Context) {
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LLVMContextImpl *pImpl = Context.pImpl;
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if (pImpl->TheFalseVal)
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return pImpl->TheFalseVal;
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return (pImpl->TheFalseVal =
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ConstantInt::get(IntegerType::get(Context, 1), 0));
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// Get a ConstantInt from an APInt. Note that the value stored in the DenseMap
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// as the key, is a DenseMapAPIntKeyInfo::KeyTy which has provided the
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// operator== and operator!= to ensure that the DenseMap doesn't attempt to
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// compare APInt's of different widths, which would violate an APInt class
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// invariant which generates an assertion.
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ConstantInt *ConstantInt::get(LLVMContext &Context, const APInt& V) {
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// Get the corresponding integer type for the bit width of the value.
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const IntegerType *ITy = IntegerType::get(Context, V.getBitWidth());
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// get an existing value or the insertion position
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DenseMapAPIntKeyInfo::KeyTy Key(V, ITy);
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ConstantInt *&Slot = Context.pImpl->IntConstants[Key];
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if (!Slot) Slot = new ConstantInt(ITy, V);
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Constant* ConstantInt::get(const Type* Ty, uint64_t V, bool isSigned) {
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Constant *C = get(cast<IntegerType>(Ty->getScalarType()),
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// For vectors, broadcast the value.
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if (const VectorType *VTy = dyn_cast<VectorType>(Ty))
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return ConstantVector::get(
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std::vector<Constant *>(VTy->getNumElements(), C));
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ConstantInt* ConstantInt::get(const IntegerType* Ty, uint64_t V,
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return get(Ty->getContext(), APInt(Ty->getBitWidth(), V, isSigned));
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ConstantInt* ConstantInt::getSigned(const IntegerType* Ty, int64_t V) {
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return get(Ty, V, true);
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Constant *ConstantInt::getSigned(const Type *Ty, int64_t V) {
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return get(Ty, V, true);
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Constant* ConstantInt::get(const Type* Ty, const APInt& V) {
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ConstantInt *C = get(Ty->getContext(), V);
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assert(C->getType() == Ty->getScalarType() &&
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"ConstantInt type doesn't match the type implied by its value!");
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// For vectors, broadcast the value.
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if (const VectorType *VTy = dyn_cast<VectorType>(Ty))
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return ConstantVector::get(
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std::vector<Constant *>(VTy->getNumElements(), C));
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ConstantInt* ConstantInt::get(const IntegerType* Ty, StringRef Str,
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return get(Ty->getContext(), APInt(Ty->getBitWidth(), Str, radix));
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//===----------------------------------------------------------------------===//
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//===----------------------------------------------------------------------===//
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static const fltSemantics *TypeToFloatSemantics(const Type *Ty) {
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return &APFloat::IEEEsingle;
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if (Ty->isDoubleTy())
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return &APFloat::IEEEdouble;
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if (Ty->isX86_FP80Ty())
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return &APFloat::x87DoubleExtended;
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else if (Ty->isFP128Ty())
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return &APFloat::IEEEquad;
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assert(Ty->isPPC_FP128Ty() && "Unknown FP format");
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return &APFloat::PPCDoubleDouble;
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/// get() - This returns a constant fp for the specified value in the
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/// specified type. This should only be used for simple constant values like
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/// 2.0/1.0 etc, that are known-valid both as double and as the target format.
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Constant* ConstantFP::get(const Type* Ty, double V) {
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LLVMContext &Context = Ty->getContext();
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FV.convert(*TypeToFloatSemantics(Ty->getScalarType()),
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APFloat::rmNearestTiesToEven, &ignored);
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Constant *C = get(Context, FV);
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// For vectors, broadcast the value.
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if (const VectorType *VTy = dyn_cast<VectorType>(Ty))
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return ConstantVector::get(
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std::vector<Constant *>(VTy->getNumElements(), C));
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Constant* ConstantFP::get(const Type* Ty, StringRef Str) {
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LLVMContext &Context = Ty->getContext();
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APFloat FV(*TypeToFloatSemantics(Ty->getScalarType()), Str);
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Constant *C = get(Context, FV);
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// For vectors, broadcast the value.
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if (const VectorType *VTy = dyn_cast<VectorType>(Ty))
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return ConstantVector::get(
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std::vector<Constant *>(VTy->getNumElements(), C));
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ConstantFP* ConstantFP::getNegativeZero(const Type* Ty) {
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LLVMContext &Context = Ty->getContext();
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APFloat apf = cast <ConstantFP>(Constant::getNullValue(Ty))->getValueAPF();
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return get(Context, apf);
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Constant* ConstantFP::getZeroValueForNegation(const Type* Ty) {
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if (const VectorType *PTy = dyn_cast<VectorType>(Ty))
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if (PTy->getElementType()->isFloatingPointTy()) {
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std::vector<Constant*> zeros(PTy->getNumElements(),
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getNegativeZero(PTy->getElementType()));
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return ConstantVector::get(PTy, zeros);
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if (Ty->isFloatingPointTy())
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return getNegativeZero(Ty);
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return Constant::getNullValue(Ty);
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// ConstantFP accessors.
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ConstantFP* ConstantFP::get(LLVMContext &Context, const APFloat& V) {
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DenseMapAPFloatKeyInfo::KeyTy Key(V);
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LLVMContextImpl* pImpl = Context.pImpl;
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ConstantFP *&Slot = pImpl->FPConstants[Key];
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if (&V.getSemantics() == &APFloat::IEEEsingle)
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Ty = Type::getFloatTy(Context);
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else if (&V.getSemantics() == &APFloat::IEEEdouble)
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Ty = Type::getDoubleTy(Context);
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else if (&V.getSemantics() == &APFloat::x87DoubleExtended)
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Ty = Type::getX86_FP80Ty(Context);
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else if (&V.getSemantics() == &APFloat::IEEEquad)
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Ty = Type::getFP128Ty(Context);
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assert(&V.getSemantics() == &APFloat::PPCDoubleDouble &&
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"Unknown FP format");
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Ty = Type::getPPC_FP128Ty(Context);
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Slot = new ConstantFP(Ty, V);
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ConstantFP *ConstantFP::getInfinity(const Type *Ty, bool Negative) {
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const fltSemantics &Semantics = *TypeToFloatSemantics(Ty);
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return ConstantFP::get(Ty->getContext(),
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APFloat::getInf(Semantics, Negative));
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ConstantFP::ConstantFP(const Type *Ty, const APFloat& V)
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: Constant(Ty, ConstantFPVal, 0, 0), Val(V) {
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assert(&V.getSemantics() == TypeToFloatSemantics(Ty) &&
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bool ConstantFP::isNullValue() const {
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return Val.isZero() && !Val.isNegative();
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bool ConstantFP::isExactlyValue(const APFloat& V) const {
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return Val.bitwiseIsEqual(V);
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//===----------------------------------------------------------------------===//
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// ConstantXXX Classes
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//===----------------------------------------------------------------------===//
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ConstantArray::ConstantArray(const ArrayType *T,
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const std::vector<Constant*> &V)
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: Constant(T, ConstantArrayVal,
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OperandTraits<ConstantArray>::op_end(this) - V.size(),
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assert(V.size() == T->getNumElements() &&
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"Invalid initializer vector for constant array");
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Use *OL = OperandList;
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for (std::vector<Constant*>::const_iterator I = V.begin(), E = V.end();
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assert(C->getType() == T->getElementType() &&
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"Initializer for array element doesn't match array element type!");
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Constant *ConstantArray::get(const ArrayType *Ty,
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const std::vector<Constant*> &V) {
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for (unsigned i = 0, e = V.size(); i != e; ++i) {
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assert(V[i]->getType() == Ty->getElementType() &&
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"Wrong type in array element initializer");
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LLVMContextImpl *pImpl = Ty->getContext().pImpl;
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// If this is an all-zero array, return a ConstantAggregateZero object
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if (!C->isNullValue())
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return pImpl->ArrayConstants.getOrCreate(Ty, V);
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for (unsigned i = 1, e = V.size(); i != e; ++i)
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return pImpl->ArrayConstants.getOrCreate(Ty, V);
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return ConstantAggregateZero::get(Ty);
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Constant* ConstantArray::get(const ArrayType* T, Constant* const* Vals,
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// FIXME: make this the primary ctor method.
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return get(T, std::vector<Constant*>(Vals, Vals+NumVals));
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/// ConstantArray::get(const string&) - Return an array that is initialized to
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/// contain the specified string. If length is zero then a null terminator is
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/// added to the specified string so that it may be used in a natural way.
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/// Otherwise, the length parameter specifies how much of the string to use
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/// and it won't be null terminated.
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Constant* ConstantArray::get(LLVMContext &Context, StringRef Str,
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std::vector<Constant*> ElementVals;
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for (unsigned i = 0; i < Str.size(); ++i)
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ElementVals.push_back(ConstantInt::get(Type::getInt8Ty(Context), Str[i]));
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// Add a null terminator to the string...
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ElementVals.push_back(ConstantInt::get(Type::getInt8Ty(Context), 0));
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ArrayType *ATy = ArrayType::get(Type::getInt8Ty(Context), ElementVals.size());
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return get(ATy, ElementVals);
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ConstantStruct::ConstantStruct(const StructType *T,
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const std::vector<Constant*> &V)
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: Constant(T, ConstantStructVal,
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OperandTraits<ConstantStruct>::op_end(this) - V.size(),
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assert(V.size() == T->getNumElements() &&
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"Invalid initializer vector for constant structure");
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Use *OL = OperandList;
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for (std::vector<Constant*>::const_iterator I = V.begin(), E = V.end();
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assert(C->getType() == T->getElementType(I-V.begin()) &&
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"Initializer for struct element doesn't match struct element type!");
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// ConstantStruct accessors.
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Constant* ConstantStruct::get(const StructType* T,
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const std::vector<Constant*>& V) {
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LLVMContextImpl* pImpl = T->getContext().pImpl;
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// Create a ConstantAggregateZero value if all elements are zeros...
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for (unsigned i = 0, e = V.size(); i != e; ++i)
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if (!V[i]->isNullValue())
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return pImpl->StructConstants.getOrCreate(T, V);
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return ConstantAggregateZero::get(T);
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Constant* ConstantStruct::get(LLVMContext &Context,
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const std::vector<Constant*>& V, bool packed) {
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std::vector<const Type*> StructEls;
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StructEls.reserve(V.size());
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for (unsigned i = 0, e = V.size(); i != e; ++i)
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StructEls.push_back(V[i]->getType());
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return get(StructType::get(Context, StructEls, packed), V);
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Constant* ConstantStruct::get(LLVMContext &Context,
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Constant* const *Vals, unsigned NumVals,
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// FIXME: make this the primary ctor method.
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return get(Context, std::vector<Constant*>(Vals, Vals+NumVals), Packed);
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ConstantUnion::ConstantUnion(const UnionType *T, Constant* V)
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: Constant(T, ConstantUnionVal,
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OperandTraits<ConstantUnion>::op_end(this) - 1, 1) {
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Use *OL = OperandList;
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assert(T->getElementTypeIndex(V->getType()) >= 0 &&
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"Initializer for union element isn't a member of union type!");
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// ConstantUnion accessors.
598
Constant* ConstantUnion::get(const UnionType* T, Constant* V) {
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LLVMContextImpl* pImpl = T->getContext().pImpl;
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// Create a ConstantAggregateZero value if all elements are zeros...
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if (!V->isNullValue())
603
return pImpl->UnionConstants.getOrCreate(T, V);
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return ConstantAggregateZero::get(T);
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ConstantVector::ConstantVector(const VectorType *T,
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const std::vector<Constant*> &V)
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: Constant(T, ConstantVectorVal,
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OperandTraits<ConstantVector>::op_end(this) - V.size(),
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Use *OL = OperandList;
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for (std::vector<Constant*>::const_iterator I = V.begin(), E = V.end();
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assert(C->getType() == T->getElementType() &&
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"Initializer for vector element doesn't match vector element type!");
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// ConstantVector accessors.
625
Constant* ConstantVector::get(const VectorType* T,
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const std::vector<Constant*>& V) {
627
assert(!V.empty() && "Vectors can't be empty");
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LLVMContext &Context = T->getContext();
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LLVMContextImpl *pImpl = Context.pImpl;
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// If this is an all-undef or alll-zero vector, return a
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// ConstantAggregateZero or UndefValue.
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bool isZero = C->isNullValue();
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bool isUndef = isa<UndefValue>(C);
637
if (isZero || isUndef) {
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for (unsigned i = 1, e = V.size(); i != e; ++i)
640
isZero = isUndef = false;
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return ConstantAggregateZero::get(T);
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return UndefValue::get(T);
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return pImpl->VectorConstants.getOrCreate(T, V);
653
Constant* ConstantVector::get(const std::vector<Constant*>& V) {
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assert(!V.empty() && "Cannot infer type if V is empty");
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return get(VectorType::get(V.front()->getType(),V.size()), V);
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Constant* ConstantVector::get(Constant* const* Vals, unsigned NumVals) {
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// FIXME: make this the primary ctor method.
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return get(std::vector<Constant*>(Vals, Vals+NumVals));
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Constant* ConstantExpr::getNSWNeg(Constant* C) {
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assert(C->getType()->isIntOrIntVectorTy() &&
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"Cannot NEG a nonintegral value!");
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return getNSWSub(ConstantFP::getZeroValueForNegation(C->getType()), C);
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Constant* ConstantExpr::getNUWNeg(Constant* C) {
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assert(C->getType()->isIntOrIntVectorTy() &&
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"Cannot NEG a nonintegral value!");
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return getNUWSub(ConstantFP::getZeroValueForNegation(C->getType()), C);
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Constant* ConstantExpr::getNSWAdd(Constant* C1, Constant* C2) {
676
return getTy(C1->getType(), Instruction::Add, C1, C2,
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OverflowingBinaryOperator::NoSignedWrap);
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Constant* ConstantExpr::getNUWAdd(Constant* C1, Constant* C2) {
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return getTy(C1->getType(), Instruction::Add, C1, C2,
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OverflowingBinaryOperator::NoUnsignedWrap);
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Constant* ConstantExpr::getNSWSub(Constant* C1, Constant* C2) {
686
return getTy(C1->getType(), Instruction::Sub, C1, C2,
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OverflowingBinaryOperator::NoSignedWrap);
690
Constant* ConstantExpr::getNUWSub(Constant* C1, Constant* C2) {
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return getTy(C1->getType(), Instruction::Sub, C1, C2,
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OverflowingBinaryOperator::NoUnsignedWrap);
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Constant* ConstantExpr::getNSWMul(Constant* C1, Constant* C2) {
696
return getTy(C1->getType(), Instruction::Mul, C1, C2,
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OverflowingBinaryOperator::NoSignedWrap);
700
Constant* ConstantExpr::getNUWMul(Constant* C1, Constant* C2) {
701
return getTy(C1->getType(), Instruction::Mul, C1, C2,
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OverflowingBinaryOperator::NoUnsignedWrap);
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Constant* ConstantExpr::getExactSDiv(Constant* C1, Constant* C2) {
706
return getTy(C1->getType(), Instruction::SDiv, C1, C2,
707
SDivOperator::IsExact);
710
// Utility function for determining if a ConstantExpr is a CastOp or not. This
711
// can't be inline because we don't want to #include Instruction.h into
713
bool ConstantExpr::isCast() const {
714
return Instruction::isCast(getOpcode());
717
bool ConstantExpr::isCompare() const {
718
return getOpcode() == Instruction::ICmp || getOpcode() == Instruction::FCmp;
721
bool ConstantExpr::isGEPWithNoNotionalOverIndexing() const {
722
if (getOpcode() != Instruction::GetElementPtr) return false;
724
gep_type_iterator GEPI = gep_type_begin(this), E = gep_type_end(this);
725
User::const_op_iterator OI = next(this->op_begin());
727
// Skip the first index, as it has no static limit.
731
// The remaining indices must be compile-time known integers within the
732
// bounds of the corresponding notional static array types.
733
for (; GEPI != E; ++GEPI, ++OI) {
734
ConstantInt *CI = dyn_cast<ConstantInt>(*OI);
735
if (!CI) return false;
736
if (const ArrayType *ATy = dyn_cast<ArrayType>(*GEPI))
737
if (CI->getValue().getActiveBits() > 64 ||
738
CI->getZExtValue() >= ATy->getNumElements())
742
// All the indices checked out.
746
bool ConstantExpr::hasIndices() const {
747
return getOpcode() == Instruction::ExtractValue ||
748
getOpcode() == Instruction::InsertValue;
751
const SmallVector<unsigned, 4> &ConstantExpr::getIndices() const {
752
if (const ExtractValueConstantExpr *EVCE =
753
dyn_cast<ExtractValueConstantExpr>(this))
754
return EVCE->Indices;
756
return cast<InsertValueConstantExpr>(this)->Indices;
759
unsigned ConstantExpr::getPredicate() const {
760
assert(getOpcode() == Instruction::FCmp ||
761
getOpcode() == Instruction::ICmp);
762
return ((const CompareConstantExpr*)this)->predicate;
765
/// getWithOperandReplaced - Return a constant expression identical to this
766
/// one, but with the specified operand set to the specified value.
768
ConstantExpr::getWithOperandReplaced(unsigned OpNo, Constant *Op) const {
769
assert(OpNo < getNumOperands() && "Operand num is out of range!");
770
assert(Op->getType() == getOperand(OpNo)->getType() &&
771
"Replacing operand with value of different type!");
772
if (getOperand(OpNo) == Op)
773
return const_cast<ConstantExpr*>(this);
775
Constant *Op0, *Op1, *Op2;
776
switch (getOpcode()) {
777
case Instruction::Trunc:
778
case Instruction::ZExt:
779
case Instruction::SExt:
780
case Instruction::FPTrunc:
781
case Instruction::FPExt:
782
case Instruction::UIToFP:
783
case Instruction::SIToFP:
784
case Instruction::FPToUI:
785
case Instruction::FPToSI:
786
case Instruction::PtrToInt:
787
case Instruction::IntToPtr:
788
case Instruction::BitCast:
789
return ConstantExpr::getCast(getOpcode(), Op, getType());
790
case Instruction::Select:
791
Op0 = (OpNo == 0) ? Op : getOperand(0);
792
Op1 = (OpNo == 1) ? Op : getOperand(1);
793
Op2 = (OpNo == 2) ? Op : getOperand(2);
794
return ConstantExpr::getSelect(Op0, Op1, Op2);
795
case Instruction::InsertElement:
796
Op0 = (OpNo == 0) ? Op : getOperand(0);
797
Op1 = (OpNo == 1) ? Op : getOperand(1);
798
Op2 = (OpNo == 2) ? Op : getOperand(2);
799
return ConstantExpr::getInsertElement(Op0, Op1, Op2);
800
case Instruction::ExtractElement:
801
Op0 = (OpNo == 0) ? Op : getOperand(0);
802
Op1 = (OpNo == 1) ? Op : getOperand(1);
803
return ConstantExpr::getExtractElement(Op0, Op1);
804
case Instruction::ShuffleVector:
805
Op0 = (OpNo == 0) ? Op : getOperand(0);
806
Op1 = (OpNo == 1) ? Op : getOperand(1);
807
Op2 = (OpNo == 2) ? Op : getOperand(2);
808
return ConstantExpr::getShuffleVector(Op0, Op1, Op2);
809
case Instruction::GetElementPtr: {
810
SmallVector<Constant*, 8> Ops;
811
Ops.resize(getNumOperands()-1);
812
for (unsigned i = 1, e = getNumOperands(); i != e; ++i)
813
Ops[i-1] = getOperand(i);
815
return cast<GEPOperator>(this)->isInBounds() ?
816
ConstantExpr::getInBoundsGetElementPtr(Op, &Ops[0], Ops.size()) :
817
ConstantExpr::getGetElementPtr(Op, &Ops[0], Ops.size());
819
return cast<GEPOperator>(this)->isInBounds() ?
820
ConstantExpr::getInBoundsGetElementPtr(getOperand(0), &Ops[0],Ops.size()):
821
ConstantExpr::getGetElementPtr(getOperand(0), &Ops[0], Ops.size());
824
assert(getNumOperands() == 2 && "Must be binary operator?");
825
Op0 = (OpNo == 0) ? Op : getOperand(0);
826
Op1 = (OpNo == 1) ? Op : getOperand(1);
827
return ConstantExpr::get(getOpcode(), Op0, Op1, SubclassOptionalData);
831
/// getWithOperands - This returns the current constant expression with the
832
/// operands replaced with the specified values. The specified operands must
833
/// match count and type with the existing ones.
834
Constant *ConstantExpr::
835
getWithOperands(Constant* const *Ops, unsigned NumOps) const {
836
assert(NumOps == getNumOperands() && "Operand count mismatch!");
837
bool AnyChange = false;
838
for (unsigned i = 0; i != NumOps; ++i) {
839
assert(Ops[i]->getType() == getOperand(i)->getType() &&
840
"Operand type mismatch!");
841
AnyChange |= Ops[i] != getOperand(i);
843
if (!AnyChange) // No operands changed, return self.
844
return const_cast<ConstantExpr*>(this);
846
switch (getOpcode()) {
847
case Instruction::Trunc:
848
case Instruction::ZExt:
849
case Instruction::SExt:
850
case Instruction::FPTrunc:
851
case Instruction::FPExt:
852
case Instruction::UIToFP:
853
case Instruction::SIToFP:
854
case Instruction::FPToUI:
855
case Instruction::FPToSI:
856
case Instruction::PtrToInt:
857
case Instruction::IntToPtr:
858
case Instruction::BitCast:
859
return ConstantExpr::getCast(getOpcode(), Ops[0], getType());
860
case Instruction::Select:
861
return ConstantExpr::getSelect(Ops[0], Ops[1], Ops[2]);
862
case Instruction::InsertElement:
863
return ConstantExpr::getInsertElement(Ops[0], Ops[1], Ops[2]);
864
case Instruction::ExtractElement:
865
return ConstantExpr::getExtractElement(Ops[0], Ops[1]);
866
case Instruction::ShuffleVector:
867
return ConstantExpr::getShuffleVector(Ops[0], Ops[1], Ops[2]);
868
case Instruction::GetElementPtr:
869
return cast<GEPOperator>(this)->isInBounds() ?
870
ConstantExpr::getInBoundsGetElementPtr(Ops[0], &Ops[1], NumOps-1) :
871
ConstantExpr::getGetElementPtr(Ops[0], &Ops[1], NumOps-1);
872
case Instruction::ICmp:
873
case Instruction::FCmp:
874
return ConstantExpr::getCompare(getPredicate(), Ops[0], Ops[1]);
876
assert(getNumOperands() == 2 && "Must be binary operator?");
877
return ConstantExpr::get(getOpcode(), Ops[0], Ops[1], SubclassOptionalData);
882
//===----------------------------------------------------------------------===//
883
// isValueValidForType implementations
885
bool ConstantInt::isValueValidForType(const Type *Ty, uint64_t Val) {
886
unsigned NumBits = cast<IntegerType>(Ty)->getBitWidth(); // assert okay
887
if (Ty == Type::getInt1Ty(Ty->getContext()))
888
return Val == 0 || Val == 1;
890
return true; // always true, has to fit in largest type
891
uint64_t Max = (1ll << NumBits) - 1;
895
bool ConstantInt::isValueValidForType(const Type *Ty, int64_t Val) {
896
unsigned NumBits = cast<IntegerType>(Ty)->getBitWidth(); // assert okay
897
if (Ty == Type::getInt1Ty(Ty->getContext()))
898
return Val == 0 || Val == 1 || Val == -1;
900
return true; // always true, has to fit in largest type
901
int64_t Min = -(1ll << (NumBits-1));
902
int64_t Max = (1ll << (NumBits-1)) - 1;
903
return (Val >= Min && Val <= Max);
906
bool ConstantFP::isValueValidForType(const Type *Ty, const APFloat& Val) {
907
// convert modifies in place, so make a copy.
908
APFloat Val2 = APFloat(Val);
910
switch (Ty->getTypeID()) {
912
return false; // These can't be represented as floating point!
914
// FIXME rounding mode needs to be more flexible
915
case Type::FloatTyID: {
916
if (&Val2.getSemantics() == &APFloat::IEEEsingle)
918
Val2.convert(APFloat::IEEEsingle, APFloat::rmNearestTiesToEven, &losesInfo);
921
case Type::DoubleTyID: {
922
if (&Val2.getSemantics() == &APFloat::IEEEsingle ||
923
&Val2.getSemantics() == &APFloat::IEEEdouble)
925
Val2.convert(APFloat::IEEEdouble, APFloat::rmNearestTiesToEven, &losesInfo);
928
case Type::X86_FP80TyID:
929
return &Val2.getSemantics() == &APFloat::IEEEsingle ||
930
&Val2.getSemantics() == &APFloat::IEEEdouble ||
931
&Val2.getSemantics() == &APFloat::x87DoubleExtended;
932
case Type::FP128TyID:
933
return &Val2.getSemantics() == &APFloat::IEEEsingle ||
934
&Val2.getSemantics() == &APFloat::IEEEdouble ||
935
&Val2.getSemantics() == &APFloat::IEEEquad;
936
case Type::PPC_FP128TyID:
937
return &Val2.getSemantics() == &APFloat::IEEEsingle ||
938
&Val2.getSemantics() == &APFloat::IEEEdouble ||
939
&Val2.getSemantics() == &APFloat::PPCDoubleDouble;
943
//===----------------------------------------------------------------------===//
944
// Factory Function Implementation
946
ConstantAggregateZero* ConstantAggregateZero::get(const Type* Ty) {
947
assert((Ty->isStructTy() || Ty->isArrayTy() || Ty->isVectorTy()) &&
948
"Cannot create an aggregate zero of non-aggregate type!");
950
LLVMContextImpl *pImpl = Ty->getContext().pImpl;
951
return pImpl->AggZeroConstants.getOrCreate(Ty, 0);
954
/// destroyConstant - Remove the constant from the constant table...
956
void ConstantAggregateZero::destroyConstant() {
957
getType()->getContext().pImpl->AggZeroConstants.remove(this);
958
destroyConstantImpl();
961
/// destroyConstant - Remove the constant from the constant table...
963
void ConstantArray::destroyConstant() {
964
getType()->getContext().pImpl->ArrayConstants.remove(this);
965
destroyConstantImpl();
968
/// isString - This method returns true if the array is an array of i8, and
969
/// if the elements of the array are all ConstantInt's.
970
bool ConstantArray::isString() const {
971
// Check the element type for i8...
972
if (!getType()->getElementType()->isIntegerTy(8))
974
// Check the elements to make sure they are all integers, not constant
976
for (unsigned i = 0, e = getNumOperands(); i != e; ++i)
977
if (!isa<ConstantInt>(getOperand(i)))
982
/// isCString - This method returns true if the array is a string (see
983
/// isString) and it ends in a null byte \\0 and does not contains any other
984
/// null bytes except its terminator.
985
bool ConstantArray::isCString() const {
986
// Check the element type for i8...
987
if (!getType()->getElementType()->isIntegerTy(8))
990
// Last element must be a null.
991
if (!getOperand(getNumOperands()-1)->isNullValue())
993
// Other elements must be non-null integers.
994
for (unsigned i = 0, e = getNumOperands()-1; i != e; ++i) {
995
if (!isa<ConstantInt>(getOperand(i)))
997
if (getOperand(i)->isNullValue())
1004
/// getAsString - If the sub-element type of this array is i8
1005
/// then this method converts the array to an std::string and returns it.
1006
/// Otherwise, it asserts out.
1008
std::string ConstantArray::getAsString() const {
1009
assert(isString() && "Not a string!");
1011
Result.reserve(getNumOperands());
1012
for (unsigned i = 0, e = getNumOperands(); i != e; ++i)
1013
Result.push_back((char)cast<ConstantInt>(getOperand(i))->getZExtValue());
1018
//---- ConstantStruct::get() implementation...
1025
// destroyConstant - Remove the constant from the constant table...
1027
void ConstantStruct::destroyConstant() {
1028
getType()->getContext().pImpl->StructConstants.remove(this);
1029
destroyConstantImpl();
1032
// destroyConstant - Remove the constant from the constant table...
1034
void ConstantUnion::destroyConstant() {
1035
getType()->getContext().pImpl->UnionConstants.remove(this);
1036
destroyConstantImpl();
1039
// destroyConstant - Remove the constant from the constant table...
1041
void ConstantVector::destroyConstant() {
1042
getType()->getContext().pImpl->VectorConstants.remove(this);
1043
destroyConstantImpl();
1046
/// This function will return true iff every element in this vector constant
1047
/// is set to all ones.
1048
/// @returns true iff this constant's emements are all set to all ones.
1049
/// @brief Determine if the value is all ones.
1050
bool ConstantVector::isAllOnesValue() const {
1051
// Check out first element.
1052
const Constant *Elt = getOperand(0);
1053
const ConstantInt *CI = dyn_cast<ConstantInt>(Elt);
1054
if (!CI || !CI->isAllOnesValue()) return false;
1055
// Then make sure all remaining elements point to the same value.
1056
for (unsigned I = 1, E = getNumOperands(); I < E; ++I) {
1057
if (getOperand(I) != Elt) return false;
1062
/// getSplatValue - If this is a splat constant, where all of the
1063
/// elements have the same value, return that value. Otherwise return null.
1064
Constant *ConstantVector::getSplatValue() {
1065
// Check out first element.
1066
Constant *Elt = getOperand(0);
1067
// Then make sure all remaining elements point to the same value.
1068
for (unsigned I = 1, E = getNumOperands(); I < E; ++I)
1069
if (getOperand(I) != Elt) return 0;
1073
//---- ConstantPointerNull::get() implementation.
1076
ConstantPointerNull *ConstantPointerNull::get(const PointerType *Ty) {
1077
return Ty->getContext().pImpl->NullPtrConstants.getOrCreate(Ty, 0);
1080
// destroyConstant - Remove the constant from the constant table...
1082
void ConstantPointerNull::destroyConstant() {
1083
getType()->getContext().pImpl->NullPtrConstants.remove(this);
1084
destroyConstantImpl();
1088
//---- UndefValue::get() implementation.
1091
UndefValue *UndefValue::get(const Type *Ty) {
1092
return Ty->getContext().pImpl->UndefValueConstants.getOrCreate(Ty, 0);
1095
// destroyConstant - Remove the constant from the constant table.
1097
void UndefValue::destroyConstant() {
1098
getType()->getContext().pImpl->UndefValueConstants.remove(this);
1099
destroyConstantImpl();
1102
//---- BlockAddress::get() implementation.
1105
BlockAddress *BlockAddress::get(BasicBlock *BB) {
1106
assert(BB->getParent() != 0 && "Block must have a parent");
1107
return get(BB->getParent(), BB);
1110
BlockAddress *BlockAddress::get(Function *F, BasicBlock *BB) {
1112
F->getContext().pImpl->BlockAddresses[std::make_pair(F, BB)];
1114
BA = new BlockAddress(F, BB);
1116
assert(BA->getFunction() == F && "Basic block moved between functions");
1120
BlockAddress::BlockAddress(Function *F, BasicBlock *BB)
1121
: Constant(Type::getInt8PtrTy(F->getContext()), Value::BlockAddressVal,
1125
BB->AdjustBlockAddressRefCount(1);
1129
// destroyConstant - Remove the constant from the constant table.
1131
void BlockAddress::destroyConstant() {
1132
getFunction()->getType()->getContext().pImpl
1133
->BlockAddresses.erase(std::make_pair(getFunction(), getBasicBlock()));
1134
getBasicBlock()->AdjustBlockAddressRefCount(-1);
1135
destroyConstantImpl();
1138
void BlockAddress::replaceUsesOfWithOnConstant(Value *From, Value *To, Use *U) {
1139
// This could be replacing either the Basic Block or the Function. In either
1140
// case, we have to remove the map entry.
1141
Function *NewF = getFunction();
1142
BasicBlock *NewBB = getBasicBlock();
1145
NewF = cast<Function>(To);
1147
NewBB = cast<BasicBlock>(To);
1149
// See if the 'new' entry already exists, if not, just update this in place
1150
// and return early.
1151
BlockAddress *&NewBA =
1152
getContext().pImpl->BlockAddresses[std::make_pair(NewF, NewBB)];
1154
getBasicBlock()->AdjustBlockAddressRefCount(-1);
1156
// Remove the old entry, this can't cause the map to rehash (just a
1157
// tombstone will get added).
1158
getContext().pImpl->BlockAddresses.erase(std::make_pair(getFunction(),
1161
setOperand(0, NewF);
1162
setOperand(1, NewBB);
1163
getBasicBlock()->AdjustBlockAddressRefCount(1);
1167
// Otherwise, I do need to replace this with an existing value.
1168
assert(NewBA != this && "I didn't contain From!");
1170
// Everyone using this now uses the replacement.
1171
uncheckedReplaceAllUsesWith(NewBA);
1176
//---- ConstantExpr::get() implementations.
1179
/// This is a utility function to handle folding of casts and lookup of the
1180
/// cast in the ExprConstants map. It is used by the various get* methods below.
1181
static inline Constant *getFoldedCast(
1182
Instruction::CastOps opc, Constant *C, const Type *Ty) {
1183
assert(Ty->isFirstClassType() && "Cannot cast to an aggregate type!");
1184
// Fold a few common cases
1185
if (Constant *FC = ConstantFoldCastInstruction(opc, C, Ty))
1188
LLVMContextImpl *pImpl = Ty->getContext().pImpl;
1190
// Look up the constant in the table first to ensure uniqueness
1191
std::vector<Constant*> argVec(1, C);
1192
ExprMapKeyType Key(opc, argVec);
1194
return pImpl->ExprConstants.getOrCreate(Ty, Key);
1197
Constant *ConstantExpr::getCast(unsigned oc, Constant *C, const Type *Ty) {
1198
Instruction::CastOps opc = Instruction::CastOps(oc);
1199
assert(Instruction::isCast(opc) && "opcode out of range");
1200
assert(C && Ty && "Null arguments to getCast");
1201
assert(CastInst::castIsValid(opc, C, Ty) && "Invalid constantexpr cast!");
1205
llvm_unreachable("Invalid cast opcode");
1207
case Instruction::Trunc: return getTrunc(C, Ty);
1208
case Instruction::ZExt: return getZExt(C, Ty);
1209
case Instruction::SExt: return getSExt(C, Ty);
1210
case Instruction::FPTrunc: return getFPTrunc(C, Ty);
1211
case Instruction::FPExt: return getFPExtend(C, Ty);
1212
case Instruction::UIToFP: return getUIToFP(C, Ty);
1213
case Instruction::SIToFP: return getSIToFP(C, Ty);
1214
case Instruction::FPToUI: return getFPToUI(C, Ty);
1215
case Instruction::FPToSI: return getFPToSI(C, Ty);
1216
case Instruction::PtrToInt: return getPtrToInt(C, Ty);
1217
case Instruction::IntToPtr: return getIntToPtr(C, Ty);
1218
case Instruction::BitCast: return getBitCast(C, Ty);
1223
Constant *ConstantExpr::getZExtOrBitCast(Constant *C, const Type *Ty) {
1224
if (C->getType()->getScalarSizeInBits() == Ty->getScalarSizeInBits())
1225
return getCast(Instruction::BitCast, C, Ty);
1226
return getCast(Instruction::ZExt, C, Ty);
1229
Constant *ConstantExpr::getSExtOrBitCast(Constant *C, const Type *Ty) {
1230
if (C->getType()->getScalarSizeInBits() == Ty->getScalarSizeInBits())
1231
return getCast(Instruction::BitCast, C, Ty);
1232
return getCast(Instruction::SExt, C, Ty);
1235
Constant *ConstantExpr::getTruncOrBitCast(Constant *C, const Type *Ty) {
1236
if (C->getType()->getScalarSizeInBits() == Ty->getScalarSizeInBits())
1237
return getCast(Instruction::BitCast, C, Ty);
1238
return getCast(Instruction::Trunc, C, Ty);
1241
Constant *ConstantExpr::getPointerCast(Constant *S, const Type *Ty) {
1242
assert(S->getType()->isPointerTy() && "Invalid cast");
1243
assert((Ty->isIntegerTy() || Ty->isPointerTy()) && "Invalid cast");
1245
if (Ty->isIntegerTy())
1246
return getCast(Instruction::PtrToInt, S, Ty);
1247
return getCast(Instruction::BitCast, S, Ty);
1250
Constant *ConstantExpr::getIntegerCast(Constant *C, const Type *Ty,
1252
assert(C->getType()->isIntOrIntVectorTy() &&
1253
Ty->isIntOrIntVectorTy() && "Invalid cast");
1254
unsigned SrcBits = C->getType()->getScalarSizeInBits();
1255
unsigned DstBits = Ty->getScalarSizeInBits();
1256
Instruction::CastOps opcode =
1257
(SrcBits == DstBits ? Instruction::BitCast :
1258
(SrcBits > DstBits ? Instruction::Trunc :
1259
(isSigned ? Instruction::SExt : Instruction::ZExt)));
1260
return getCast(opcode, C, Ty);
1263
Constant *ConstantExpr::getFPCast(Constant *C, const Type *Ty) {
1264
assert(C->getType()->isFPOrFPVectorTy() && Ty->isFPOrFPVectorTy() &&
1266
unsigned SrcBits = C->getType()->getScalarSizeInBits();
1267
unsigned DstBits = Ty->getScalarSizeInBits();
1268
if (SrcBits == DstBits)
1269
return C; // Avoid a useless cast
1270
Instruction::CastOps opcode =
1271
(SrcBits > DstBits ? Instruction::FPTrunc : Instruction::FPExt);
1272
return getCast(opcode, C, Ty);
1275
Constant *ConstantExpr::getTrunc(Constant *C, const Type *Ty) {
1277
bool fromVec = C->getType()->getTypeID() == Type::VectorTyID;
1278
bool toVec = Ty->getTypeID() == Type::VectorTyID;
1280
assert((fromVec == toVec) && "Cannot convert from scalar to/from vector");
1281
assert(C->getType()->isIntOrIntVectorTy() && "Trunc operand must be integer");
1282
assert(Ty->isIntOrIntVectorTy() && "Trunc produces only integral");
1283
assert(C->getType()->getScalarSizeInBits() > Ty->getScalarSizeInBits()&&
1284
"SrcTy must be larger than DestTy for Trunc!");
1286
return getFoldedCast(Instruction::Trunc, C, Ty);
1289
Constant *ConstantExpr::getSExt(Constant *C, const Type *Ty) {
1291
bool fromVec = C->getType()->getTypeID() == Type::VectorTyID;
1292
bool toVec = Ty->getTypeID() == Type::VectorTyID;
1294
assert((fromVec == toVec) && "Cannot convert from scalar to/from vector");
1295
assert(C->getType()->isIntOrIntVectorTy() && "SExt operand must be integral");
1296
assert(Ty->isIntOrIntVectorTy() && "SExt produces only integer");
1297
assert(C->getType()->getScalarSizeInBits() < Ty->getScalarSizeInBits()&&
1298
"SrcTy must be smaller than DestTy for SExt!");
1300
return getFoldedCast(Instruction::SExt, C, Ty);
1303
Constant *ConstantExpr::getZExt(Constant *C, const Type *Ty) {
1305
bool fromVec = C->getType()->getTypeID() == Type::VectorTyID;
1306
bool toVec = Ty->getTypeID() == Type::VectorTyID;
1308
assert((fromVec == toVec) && "Cannot convert from scalar to/from vector");
1309
assert(C->getType()->isIntOrIntVectorTy() && "ZEXt operand must be integral");
1310
assert(Ty->isIntOrIntVectorTy() && "ZExt produces only integer");
1311
assert(C->getType()->getScalarSizeInBits() < Ty->getScalarSizeInBits()&&
1312
"SrcTy must be smaller than DestTy for ZExt!");
1314
return getFoldedCast(Instruction::ZExt, C, Ty);
1317
Constant *ConstantExpr::getFPTrunc(Constant *C, const Type *Ty) {
1319
bool fromVec = C->getType()->getTypeID() == Type::VectorTyID;
1320
bool toVec = Ty->getTypeID() == Type::VectorTyID;
1322
assert((fromVec == toVec) && "Cannot convert from scalar to/from vector");
1323
assert(C->getType()->isFPOrFPVectorTy() && Ty->isFPOrFPVectorTy() &&
1324
C->getType()->getScalarSizeInBits() > Ty->getScalarSizeInBits()&&
1325
"This is an illegal floating point truncation!");
1326
return getFoldedCast(Instruction::FPTrunc, C, Ty);
1329
Constant *ConstantExpr::getFPExtend(Constant *C, const Type *Ty) {
1331
bool fromVec = C->getType()->getTypeID() == Type::VectorTyID;
1332
bool toVec = Ty->getTypeID() == Type::VectorTyID;
1334
assert((fromVec == toVec) && "Cannot convert from scalar to/from vector");
1335
assert(C->getType()->isFPOrFPVectorTy() && Ty->isFPOrFPVectorTy() &&
1336
C->getType()->getScalarSizeInBits() < Ty->getScalarSizeInBits()&&
1337
"This is an illegal floating point extension!");
1338
return getFoldedCast(Instruction::FPExt, C, Ty);
1341
Constant *ConstantExpr::getUIToFP(Constant *C, const Type *Ty) {
1343
bool fromVec = C->getType()->getTypeID() == Type::VectorTyID;
1344
bool toVec = Ty->getTypeID() == Type::VectorTyID;
1346
assert((fromVec == toVec) && "Cannot convert from scalar to/from vector");
1347
assert(C->getType()->isIntOrIntVectorTy() && Ty->isFPOrFPVectorTy() &&
1348
"This is an illegal uint to floating point cast!");
1349
return getFoldedCast(Instruction::UIToFP, C, Ty);
1352
Constant *ConstantExpr::getSIToFP(Constant *C, const Type *Ty) {
1354
bool fromVec = C->getType()->getTypeID() == Type::VectorTyID;
1355
bool toVec = Ty->getTypeID() == Type::VectorTyID;
1357
assert((fromVec == toVec) && "Cannot convert from scalar to/from vector");
1358
assert(C->getType()->isIntOrIntVectorTy() && Ty->isFPOrFPVectorTy() &&
1359
"This is an illegal sint to floating point cast!");
1360
return getFoldedCast(Instruction::SIToFP, C, Ty);
1363
Constant *ConstantExpr::getFPToUI(Constant *C, const Type *Ty) {
1365
bool fromVec = C->getType()->getTypeID() == Type::VectorTyID;
1366
bool toVec = Ty->getTypeID() == Type::VectorTyID;
1368
assert((fromVec == toVec) && "Cannot convert from scalar to/from vector");
1369
assert(C->getType()->isFPOrFPVectorTy() && Ty->isIntOrIntVectorTy() &&
1370
"This is an illegal floating point to uint cast!");
1371
return getFoldedCast(Instruction::FPToUI, C, Ty);
1374
Constant *ConstantExpr::getFPToSI(Constant *C, const Type *Ty) {
1376
bool fromVec = C->getType()->getTypeID() == Type::VectorTyID;
1377
bool toVec = Ty->getTypeID() == Type::VectorTyID;
1379
assert((fromVec == toVec) && "Cannot convert from scalar to/from vector");
1380
assert(C->getType()->isFPOrFPVectorTy() && Ty->isIntOrIntVectorTy() &&
1381
"This is an illegal floating point to sint cast!");
1382
return getFoldedCast(Instruction::FPToSI, C, Ty);
1385
Constant *ConstantExpr::getPtrToInt(Constant *C, const Type *DstTy) {
1386
assert(C->getType()->isPointerTy() && "PtrToInt source must be pointer");
1387
assert(DstTy->isIntegerTy() && "PtrToInt destination must be integral");
1388
return getFoldedCast(Instruction::PtrToInt, C, DstTy);
1391
Constant *ConstantExpr::getIntToPtr(Constant *C, const Type *DstTy) {
1392
assert(C->getType()->isIntegerTy() && "IntToPtr source must be integral");
1393
assert(DstTy->isPointerTy() && "IntToPtr destination must be a pointer");
1394
return getFoldedCast(Instruction::IntToPtr, C, DstTy);
1397
Constant *ConstantExpr::getBitCast(Constant *C, const Type *DstTy) {
1398
assert(CastInst::castIsValid(Instruction::BitCast, C, DstTy) &&
1399
"Invalid constantexpr bitcast!");
1401
// It is common to ask for a bitcast of a value to its own type, handle this
1403
if (C->getType() == DstTy) return C;
1405
return getFoldedCast(Instruction::BitCast, C, DstTy);
1408
Constant *ConstantExpr::getTy(const Type *ReqTy, unsigned Opcode,
1409
Constant *C1, Constant *C2,
1411
// Check the operands for consistency first
1412
assert(Opcode >= Instruction::BinaryOpsBegin &&
1413
Opcode < Instruction::BinaryOpsEnd &&
1414
"Invalid opcode in binary constant expression");
1415
assert(C1->getType() == C2->getType() &&
1416
"Operand types in binary constant expression should match");
1418
if (ReqTy == C1->getType() || ReqTy == Type::getInt1Ty(ReqTy->getContext()))
1419
if (Constant *FC = ConstantFoldBinaryInstruction(Opcode, C1, C2))
1420
return FC; // Fold a few common cases...
1422
std::vector<Constant*> argVec(1, C1); argVec.push_back(C2);
1423
ExprMapKeyType Key(Opcode, argVec, 0, Flags);
1425
LLVMContextImpl *pImpl = ReqTy->getContext().pImpl;
1426
return pImpl->ExprConstants.getOrCreate(ReqTy, Key);
1429
Constant *ConstantExpr::getCompareTy(unsigned short predicate,
1430
Constant *C1, Constant *C2) {
1431
switch (predicate) {
1432
default: llvm_unreachable("Invalid CmpInst predicate");
1433
case CmpInst::FCMP_FALSE: case CmpInst::FCMP_OEQ: case CmpInst::FCMP_OGT:
1434
case CmpInst::FCMP_OGE: case CmpInst::FCMP_OLT: case CmpInst::FCMP_OLE:
1435
case CmpInst::FCMP_ONE: case CmpInst::FCMP_ORD: case CmpInst::FCMP_UNO:
1436
case CmpInst::FCMP_UEQ: case CmpInst::FCMP_UGT: case CmpInst::FCMP_UGE:
1437
case CmpInst::FCMP_ULT: case CmpInst::FCMP_ULE: case CmpInst::FCMP_UNE:
1438
case CmpInst::FCMP_TRUE:
1439
return getFCmp(predicate, C1, C2);
1441
case CmpInst::ICMP_EQ: case CmpInst::ICMP_NE: case CmpInst::ICMP_UGT:
1442
case CmpInst::ICMP_UGE: case CmpInst::ICMP_ULT: case CmpInst::ICMP_ULE:
1443
case CmpInst::ICMP_SGT: case CmpInst::ICMP_SGE: case CmpInst::ICMP_SLT:
1444
case CmpInst::ICMP_SLE:
1445
return getICmp(predicate, C1, C2);
1449
Constant *ConstantExpr::get(unsigned Opcode, Constant *C1, Constant *C2,
1451
// API compatibility: Adjust integer opcodes to floating-point opcodes.
1452
if (C1->getType()->isFPOrFPVectorTy()) {
1453
if (Opcode == Instruction::Add) Opcode = Instruction::FAdd;
1454
else if (Opcode == Instruction::Sub) Opcode = Instruction::FSub;
1455
else if (Opcode == Instruction::Mul) Opcode = Instruction::FMul;
1459
case Instruction::Add:
1460
case Instruction::Sub:
1461
case Instruction::Mul:
1462
assert(C1->getType() == C2->getType() && "Op types should be identical!");
1463
assert(C1->getType()->isIntOrIntVectorTy() &&
1464
"Tried to create an integer operation on a non-integer type!");
1466
case Instruction::FAdd:
1467
case Instruction::FSub:
1468
case Instruction::FMul:
1469
assert(C1->getType() == C2->getType() && "Op types should be identical!");
1470
assert(C1->getType()->isFPOrFPVectorTy() &&
1471
"Tried to create a floating-point operation on a "
1472
"non-floating-point type!");
1474
case Instruction::UDiv:
1475
case Instruction::SDiv:
1476
assert(C1->getType() == C2->getType() && "Op types should be identical!");
1477
assert(C1->getType()->isIntOrIntVectorTy() &&
1478
"Tried to create an arithmetic operation on a non-arithmetic type!");
1480
case Instruction::FDiv:
1481
assert(C1->getType() == C2->getType() && "Op types should be identical!");
1482
assert(C1->getType()->isFPOrFPVectorTy() &&
1483
"Tried to create an arithmetic operation on a non-arithmetic type!");
1485
case Instruction::URem:
1486
case Instruction::SRem:
1487
assert(C1->getType() == C2->getType() && "Op types should be identical!");
1488
assert(C1->getType()->isIntOrIntVectorTy() &&
1489
"Tried to create an arithmetic operation on a non-arithmetic type!");
1491
case Instruction::FRem:
1492
assert(C1->getType() == C2->getType() && "Op types should be identical!");
1493
assert(C1->getType()->isFPOrFPVectorTy() &&
1494
"Tried to create an arithmetic operation on a non-arithmetic type!");
1496
case Instruction::And:
1497
case Instruction::Or:
1498
case Instruction::Xor:
1499
assert(C1->getType() == C2->getType() && "Op types should be identical!");
1500
assert(C1->getType()->isIntOrIntVectorTy() &&
1501
"Tried to create a logical operation on a non-integral type!");
1503
case Instruction::Shl:
1504
case Instruction::LShr:
1505
case Instruction::AShr:
1506
assert(C1->getType() == C2->getType() && "Op types should be identical!");
1507
assert(C1->getType()->isIntOrIntVectorTy() &&
1508
"Tried to create a shift operation on a non-integer type!");
1515
return getTy(C1->getType(), Opcode, C1, C2, Flags);
1518
Constant* ConstantExpr::getSizeOf(const Type* Ty) {
1519
// sizeof is implemented as: (i64) gep (Ty*)null, 1
1520
// Note that a non-inbounds gep is used, as null isn't within any object.
1521
Constant *GEPIdx = ConstantInt::get(Type::getInt32Ty(Ty->getContext()), 1);
1522
Constant *GEP = getGetElementPtr(
1523
Constant::getNullValue(PointerType::getUnqual(Ty)), &GEPIdx, 1);
1524
return getCast(Instruction::PtrToInt, GEP,
1525
Type::getInt64Ty(Ty->getContext()));
1528
Constant* ConstantExpr::getAlignOf(const Type* Ty) {
1529
// alignof is implemented as: (i64) gep ({i1,Ty}*)null, 0, 1
1530
// Note that a non-inbounds gep is used, as null isn't within any object.
1531
const Type *AligningTy = StructType::get(Ty->getContext(),
1532
Type::getInt1Ty(Ty->getContext()), Ty, NULL);
1533
Constant *NullPtr = Constant::getNullValue(AligningTy->getPointerTo());
1534
Constant *Zero = ConstantInt::get(Type::getInt64Ty(Ty->getContext()), 0);
1535
Constant *One = ConstantInt::get(Type::getInt32Ty(Ty->getContext()), 1);
1536
Constant *Indices[2] = { Zero, One };
1537
Constant *GEP = getGetElementPtr(NullPtr, Indices, 2);
1538
return getCast(Instruction::PtrToInt, GEP,
1539
Type::getInt64Ty(Ty->getContext()));
1542
Constant* ConstantExpr::getOffsetOf(const StructType* STy, unsigned FieldNo) {
1543
return getOffsetOf(STy, ConstantInt::get(Type::getInt32Ty(STy->getContext()),
1547
Constant* ConstantExpr::getOffsetOf(const Type* Ty, Constant *FieldNo) {
1548
// offsetof is implemented as: (i64) gep (Ty*)null, 0, FieldNo
1549
// Note that a non-inbounds gep is used, as null isn't within any object.
1550
Constant *GEPIdx[] = {
1551
ConstantInt::get(Type::getInt64Ty(Ty->getContext()), 0),
1554
Constant *GEP = getGetElementPtr(
1555
Constant::getNullValue(PointerType::getUnqual(Ty)), GEPIdx, 2);
1556
return getCast(Instruction::PtrToInt, GEP,
1557
Type::getInt64Ty(Ty->getContext()));
1560
Constant *ConstantExpr::getCompare(unsigned short pred,
1561
Constant *C1, Constant *C2) {
1562
assert(C1->getType() == C2->getType() && "Op types should be identical!");
1563
return getCompareTy(pred, C1, C2);
1566
Constant *ConstantExpr::getSelectTy(const Type *ReqTy, Constant *C,
1567
Constant *V1, Constant *V2) {
1568
assert(!SelectInst::areInvalidOperands(C, V1, V2)&&"Invalid select operands");
1570
if (ReqTy == V1->getType())
1571
if (Constant *SC = ConstantFoldSelectInstruction(C, V1, V2))
1572
return SC; // Fold common cases
1574
std::vector<Constant*> argVec(3, C);
1577
ExprMapKeyType Key(Instruction::Select, argVec);
1579
LLVMContextImpl *pImpl = ReqTy->getContext().pImpl;
1580
return pImpl->ExprConstants.getOrCreate(ReqTy, Key);
1583
Constant *ConstantExpr::getGetElementPtrTy(const Type *ReqTy, Constant *C,
1586
assert(GetElementPtrInst::getIndexedType(C->getType(), Idxs,
1588
cast<PointerType>(ReqTy)->getElementType() &&
1589
"GEP indices invalid!");
1591
if (Constant *FC = ConstantFoldGetElementPtr(C, /*inBounds=*/false,
1592
(Constant**)Idxs, NumIdx))
1593
return FC; // Fold a few common cases...
1595
assert(C->getType()->isPointerTy() &&
1596
"Non-pointer type for constant GetElementPtr expression");
1597
// Look up the constant in the table first to ensure uniqueness
1598
std::vector<Constant*> ArgVec;
1599
ArgVec.reserve(NumIdx+1);
1600
ArgVec.push_back(C);
1601
for (unsigned i = 0; i != NumIdx; ++i)
1602
ArgVec.push_back(cast<Constant>(Idxs[i]));
1603
const ExprMapKeyType Key(Instruction::GetElementPtr, ArgVec);
1605
LLVMContextImpl *pImpl = ReqTy->getContext().pImpl;
1606
return pImpl->ExprConstants.getOrCreate(ReqTy, Key);
1609
Constant *ConstantExpr::getInBoundsGetElementPtrTy(const Type *ReqTy,
1613
assert(GetElementPtrInst::getIndexedType(C->getType(), Idxs,
1615
cast<PointerType>(ReqTy)->getElementType() &&
1616
"GEP indices invalid!");
1618
if (Constant *FC = ConstantFoldGetElementPtr(C, /*inBounds=*/true,
1619
(Constant**)Idxs, NumIdx))
1620
return FC; // Fold a few common cases...
1622
assert(C->getType()->isPointerTy() &&
1623
"Non-pointer type for constant GetElementPtr expression");
1624
// Look up the constant in the table first to ensure uniqueness
1625
std::vector<Constant*> ArgVec;
1626
ArgVec.reserve(NumIdx+1);
1627
ArgVec.push_back(C);
1628
for (unsigned i = 0; i != NumIdx; ++i)
1629
ArgVec.push_back(cast<Constant>(Idxs[i]));
1630
const ExprMapKeyType Key(Instruction::GetElementPtr, ArgVec, 0,
1631
GEPOperator::IsInBounds);
1633
LLVMContextImpl *pImpl = ReqTy->getContext().pImpl;
1634
return pImpl->ExprConstants.getOrCreate(ReqTy, Key);
1637
Constant *ConstantExpr::getGetElementPtr(Constant *C, Value* const *Idxs,
1639
// Get the result type of the getelementptr!
1641
GetElementPtrInst::getIndexedType(C->getType(), Idxs, Idxs+NumIdx);
1642
assert(Ty && "GEP indices invalid!");
1643
unsigned As = cast<PointerType>(C->getType())->getAddressSpace();
1644
return getGetElementPtrTy(PointerType::get(Ty, As), C, Idxs, NumIdx);
1647
Constant *ConstantExpr::getInBoundsGetElementPtr(Constant *C,
1650
// Get the result type of the getelementptr!
1652
GetElementPtrInst::getIndexedType(C->getType(), Idxs, Idxs+NumIdx);
1653
assert(Ty && "GEP indices invalid!");
1654
unsigned As = cast<PointerType>(C->getType())->getAddressSpace();
1655
return getInBoundsGetElementPtrTy(PointerType::get(Ty, As), C, Idxs, NumIdx);
1658
Constant *ConstantExpr::getGetElementPtr(Constant *C, Constant* const *Idxs,
1660
return getGetElementPtr(C, (Value* const *)Idxs, NumIdx);
1663
Constant *ConstantExpr::getInBoundsGetElementPtr(Constant *C,
1664
Constant* const *Idxs,
1666
return getInBoundsGetElementPtr(C, (Value* const *)Idxs, NumIdx);
1670
ConstantExpr::getICmp(unsigned short pred, Constant *LHS, Constant *RHS) {
1671
assert(LHS->getType() == RHS->getType());
1672
assert(pred >= ICmpInst::FIRST_ICMP_PREDICATE &&
1673
pred <= ICmpInst::LAST_ICMP_PREDICATE && "Invalid ICmp Predicate");
1675
if (Constant *FC = ConstantFoldCompareInstruction(pred, LHS, RHS))
1676
return FC; // Fold a few common cases...
1678
// Look up the constant in the table first to ensure uniqueness
1679
std::vector<Constant*> ArgVec;
1680
ArgVec.push_back(LHS);
1681
ArgVec.push_back(RHS);
1682
// Get the key type with both the opcode and predicate
1683
const ExprMapKeyType Key(Instruction::ICmp, ArgVec, pred);
1685
const Type *ResultTy = Type::getInt1Ty(LHS->getContext());
1686
if (const VectorType *VT = dyn_cast<VectorType>(LHS->getType()))
1687
ResultTy = VectorType::get(ResultTy, VT->getNumElements());
1689
LLVMContextImpl *pImpl = LHS->getType()->getContext().pImpl;
1690
return pImpl->ExprConstants.getOrCreate(ResultTy, Key);
1694
ConstantExpr::getFCmp(unsigned short pred, Constant *LHS, Constant *RHS) {
1695
assert(LHS->getType() == RHS->getType());
1696
assert(pred <= FCmpInst::LAST_FCMP_PREDICATE && "Invalid FCmp Predicate");
1698
if (Constant *FC = ConstantFoldCompareInstruction(pred, LHS, RHS))
1699
return FC; // Fold a few common cases...
1701
// Look up the constant in the table first to ensure uniqueness
1702
std::vector<Constant*> ArgVec;
1703
ArgVec.push_back(LHS);
1704
ArgVec.push_back(RHS);
1705
// Get the key type with both the opcode and predicate
1706
const ExprMapKeyType Key(Instruction::FCmp, ArgVec, pred);
1708
const Type *ResultTy = Type::getInt1Ty(LHS->getContext());
1709
if (const VectorType *VT = dyn_cast<VectorType>(LHS->getType()))
1710
ResultTy = VectorType::get(ResultTy, VT->getNumElements());
1712
LLVMContextImpl *pImpl = LHS->getType()->getContext().pImpl;
1713
return pImpl->ExprConstants.getOrCreate(ResultTy, Key);
1716
Constant *ConstantExpr::getExtractElementTy(const Type *ReqTy, Constant *Val,
1718
if (Constant *FC = ConstantFoldExtractElementInstruction(Val, Idx))
1719
return FC; // Fold a few common cases.
1720
// Look up the constant in the table first to ensure uniqueness
1721
std::vector<Constant*> ArgVec(1, Val);
1722
ArgVec.push_back(Idx);
1723
const ExprMapKeyType Key(Instruction::ExtractElement,ArgVec);
1725
LLVMContextImpl *pImpl = ReqTy->getContext().pImpl;
1726
return pImpl->ExprConstants.getOrCreate(ReqTy, Key);
1729
Constant *ConstantExpr::getExtractElement(Constant *Val, Constant *Idx) {
1730
assert(Val->getType()->isVectorTy() &&
1731
"Tried to create extractelement operation on non-vector type!");
1732
assert(Idx->getType()->isIntegerTy(32) &&
1733
"Extractelement index must be i32 type!");
1734
return getExtractElementTy(cast<VectorType>(Val->getType())->getElementType(),
1738
Constant *ConstantExpr::getInsertElementTy(const Type *ReqTy, Constant *Val,
1739
Constant *Elt, Constant *Idx) {
1740
if (Constant *FC = ConstantFoldInsertElementInstruction(Val, Elt, Idx))
1741
return FC; // Fold a few common cases.
1742
// Look up the constant in the table first to ensure uniqueness
1743
std::vector<Constant*> ArgVec(1, Val);
1744
ArgVec.push_back(Elt);
1745
ArgVec.push_back(Idx);
1746
const ExprMapKeyType Key(Instruction::InsertElement,ArgVec);
1748
LLVMContextImpl *pImpl = ReqTy->getContext().pImpl;
1749
return pImpl->ExprConstants.getOrCreate(ReqTy, Key);
1752
Constant *ConstantExpr::getInsertElement(Constant *Val, Constant *Elt,
1754
assert(Val->getType()->isVectorTy() &&
1755
"Tried to create insertelement operation on non-vector type!");
1756
assert(Elt->getType() == cast<VectorType>(Val->getType())->getElementType()
1757
&& "Insertelement types must match!");
1758
assert(Idx->getType()->isIntegerTy(32) &&
1759
"Insertelement index must be i32 type!");
1760
return getInsertElementTy(Val->getType(), Val, Elt, Idx);
1763
Constant *ConstantExpr::getShuffleVectorTy(const Type *ReqTy, Constant *V1,
1764
Constant *V2, Constant *Mask) {
1765
if (Constant *FC = ConstantFoldShuffleVectorInstruction(V1, V2, Mask))
1766
return FC; // Fold a few common cases...
1767
// Look up the constant in the table first to ensure uniqueness
1768
std::vector<Constant*> ArgVec(1, V1);
1769
ArgVec.push_back(V2);
1770
ArgVec.push_back(Mask);
1771
const ExprMapKeyType Key(Instruction::ShuffleVector,ArgVec);
1773
LLVMContextImpl *pImpl = ReqTy->getContext().pImpl;
1774
return pImpl->ExprConstants.getOrCreate(ReqTy, Key);
1777
Constant *ConstantExpr::getShuffleVector(Constant *V1, Constant *V2,
1779
assert(ShuffleVectorInst::isValidOperands(V1, V2, Mask) &&
1780
"Invalid shuffle vector constant expr operands!");
1782
unsigned NElts = cast<VectorType>(Mask->getType())->getNumElements();
1783
const Type *EltTy = cast<VectorType>(V1->getType())->getElementType();
1784
const Type *ShufTy = VectorType::get(EltTy, NElts);
1785
return getShuffleVectorTy(ShufTy, V1, V2, Mask);
1788
Constant *ConstantExpr::getInsertValueTy(const Type *ReqTy, Constant *Agg,
1790
const unsigned *Idxs, unsigned NumIdx) {
1791
assert(ExtractValueInst::getIndexedType(Agg->getType(), Idxs,
1792
Idxs+NumIdx) == Val->getType() &&
1793
"insertvalue indices invalid!");
1794
assert(Agg->getType() == ReqTy &&
1795
"insertvalue type invalid!");
1796
assert(Agg->getType()->isFirstClassType() &&
1797
"Non-first-class type for constant InsertValue expression");
1798
Constant *FC = ConstantFoldInsertValueInstruction(Agg, Val, Idxs, NumIdx);
1799
assert(FC && "InsertValue constant expr couldn't be folded!");
1803
Constant *ConstantExpr::getInsertValue(Constant *Agg, Constant *Val,
1804
const unsigned *IdxList, unsigned NumIdx) {
1805
assert(Agg->getType()->isFirstClassType() &&
1806
"Tried to create insertelement operation on non-first-class type!");
1808
const Type *ReqTy = Agg->getType();
1811
ExtractValueInst::getIndexedType(Agg->getType(), IdxList, IdxList+NumIdx);
1813
assert(ValTy == Val->getType() && "insertvalue indices invalid!");
1814
return getInsertValueTy(ReqTy, Agg, Val, IdxList, NumIdx);
1817
Constant *ConstantExpr::getExtractValueTy(const Type *ReqTy, Constant *Agg,
1818
const unsigned *Idxs, unsigned NumIdx) {
1819
assert(ExtractValueInst::getIndexedType(Agg->getType(), Idxs,
1820
Idxs+NumIdx) == ReqTy &&
1821
"extractvalue indices invalid!");
1822
assert(Agg->getType()->isFirstClassType() &&
1823
"Non-first-class type for constant extractvalue expression");
1824
Constant *FC = ConstantFoldExtractValueInstruction(Agg, Idxs, NumIdx);
1825
assert(FC && "ExtractValue constant expr couldn't be folded!");
1829
Constant *ConstantExpr::getExtractValue(Constant *Agg,
1830
const unsigned *IdxList, unsigned NumIdx) {
1831
assert(Agg->getType()->isFirstClassType() &&
1832
"Tried to create extractelement operation on non-first-class type!");
1835
ExtractValueInst::getIndexedType(Agg->getType(), IdxList, IdxList+NumIdx);
1836
assert(ReqTy && "extractvalue indices invalid!");
1837
return getExtractValueTy(ReqTy, Agg, IdxList, NumIdx);
1840
Constant* ConstantExpr::getNeg(Constant* C) {
1841
// API compatibility: Adjust integer opcodes to floating-point opcodes.
1842
if (C->getType()->isFPOrFPVectorTy())
1844
assert(C->getType()->isIntOrIntVectorTy() &&
1845
"Cannot NEG a nonintegral value!");
1846
return get(Instruction::Sub,
1847
ConstantFP::getZeroValueForNegation(C->getType()),
1851
Constant* ConstantExpr::getFNeg(Constant* C) {
1852
assert(C->getType()->isFPOrFPVectorTy() &&
1853
"Cannot FNEG a non-floating-point value!");
1854
return get(Instruction::FSub,
1855
ConstantFP::getZeroValueForNegation(C->getType()),
1859
Constant* ConstantExpr::getNot(Constant* C) {
1860
assert(C->getType()->isIntOrIntVectorTy() &&
1861
"Cannot NOT a nonintegral value!");
1862
return get(Instruction::Xor, C, Constant::getAllOnesValue(C->getType()));
1865
Constant* ConstantExpr::getAdd(Constant* C1, Constant* C2) {
1866
return get(Instruction::Add, C1, C2);
1869
Constant* ConstantExpr::getFAdd(Constant* C1, Constant* C2) {
1870
return get(Instruction::FAdd, C1, C2);
1873
Constant* ConstantExpr::getSub(Constant* C1, Constant* C2) {
1874
return get(Instruction::Sub, C1, C2);
1877
Constant* ConstantExpr::getFSub(Constant* C1, Constant* C2) {
1878
return get(Instruction::FSub, C1, C2);
1881
Constant* ConstantExpr::getMul(Constant* C1, Constant* C2) {
1882
return get(Instruction::Mul, C1, C2);
1885
Constant* ConstantExpr::getFMul(Constant* C1, Constant* C2) {
1886
return get(Instruction::FMul, C1, C2);
1889
Constant* ConstantExpr::getUDiv(Constant* C1, Constant* C2) {
1890
return get(Instruction::UDiv, C1, C2);
1893
Constant* ConstantExpr::getSDiv(Constant* C1, Constant* C2) {
1894
return get(Instruction::SDiv, C1, C2);
1897
Constant* ConstantExpr::getFDiv(Constant* C1, Constant* C2) {
1898
return get(Instruction::FDiv, C1, C2);
1901
Constant* ConstantExpr::getURem(Constant* C1, Constant* C2) {
1902
return get(Instruction::URem, C1, C2);
1905
Constant* ConstantExpr::getSRem(Constant* C1, Constant* C2) {
1906
return get(Instruction::SRem, C1, C2);
1909
Constant* ConstantExpr::getFRem(Constant* C1, Constant* C2) {
1910
return get(Instruction::FRem, C1, C2);
1913
Constant* ConstantExpr::getAnd(Constant* C1, Constant* C2) {
1914
return get(Instruction::And, C1, C2);
1917
Constant* ConstantExpr::getOr(Constant* C1, Constant* C2) {
1918
return get(Instruction::Or, C1, C2);
1921
Constant* ConstantExpr::getXor(Constant* C1, Constant* C2) {
1922
return get(Instruction::Xor, C1, C2);
1925
Constant* ConstantExpr::getShl(Constant* C1, Constant* C2) {
1926
return get(Instruction::Shl, C1, C2);
1929
Constant* ConstantExpr::getLShr(Constant* C1, Constant* C2) {
1930
return get(Instruction::LShr, C1, C2);
1933
Constant* ConstantExpr::getAShr(Constant* C1, Constant* C2) {
1934
return get(Instruction::AShr, C1, C2);
1937
// destroyConstant - Remove the constant from the constant table...
1939
void ConstantExpr::destroyConstant() {
1940
getType()->getContext().pImpl->ExprConstants.remove(this);
1941
destroyConstantImpl();
1944
const char *ConstantExpr::getOpcodeName() const {
1945
return Instruction::getOpcodeName(getOpcode());
1948
//===----------------------------------------------------------------------===//
1949
// replaceUsesOfWithOnConstant implementations
1951
/// replaceUsesOfWithOnConstant - Update this constant array to change uses of
1952
/// 'From' to be uses of 'To'. This must update the uniquing data structures
1955
/// Note that we intentionally replace all uses of From with To here. Consider
1956
/// a large array that uses 'From' 1000 times. By handling this case all here,
1957
/// ConstantArray::replaceUsesOfWithOnConstant is only invoked once, and that
1958
/// single invocation handles all 1000 uses. Handling them one at a time would
1959
/// work, but would be really slow because it would have to unique each updated
1962
void ConstantArray::replaceUsesOfWithOnConstant(Value *From, Value *To,
1964
assert(isa<Constant>(To) && "Cannot make Constant refer to non-constant!");
1965
Constant *ToC = cast<Constant>(To);
1967
LLVMContext &Context = getType()->getContext();
1968
LLVMContextImpl *pImpl = Context.pImpl;
1970
std::pair<LLVMContextImpl::ArrayConstantsTy::MapKey, ConstantArray*> Lookup;
1971
Lookup.first.first = getType();
1972
Lookup.second = this;
1974
std::vector<Constant*> &Values = Lookup.first.second;
1975
Values.reserve(getNumOperands()); // Build replacement array.
1977
// Fill values with the modified operands of the constant array. Also,
1978
// compute whether this turns into an all-zeros array.
1979
bool isAllZeros = false;
1980
unsigned NumUpdated = 0;
1981
if (!ToC->isNullValue()) {
1982
for (Use *O = OperandList, *E = OperandList+getNumOperands(); O != E; ++O) {
1983
Constant *Val = cast<Constant>(O->get());
1988
Values.push_back(Val);
1992
for (Use *O = OperandList, *E = OperandList+getNumOperands();O != E; ++O) {
1993
Constant *Val = cast<Constant>(O->get());
1998
Values.push_back(Val);
1999
if (isAllZeros) isAllZeros = Val->isNullValue();
2003
Constant *Replacement = 0;
2005
Replacement = ConstantAggregateZero::get(getType());
2007
// Check to see if we have this array type already.
2009
LLVMContextImpl::ArrayConstantsTy::MapTy::iterator I =
2010
pImpl->ArrayConstants.InsertOrGetItem(Lookup, Exists);
2013
Replacement = I->second;
2015
// Okay, the new shape doesn't exist in the system yet. Instead of
2016
// creating a new constant array, inserting it, replaceallusesof'ing the
2017
// old with the new, then deleting the old... just update the current one
2019
pImpl->ArrayConstants.MoveConstantToNewSlot(this, I);
2021
// Update to the new value. Optimize for the case when we have a single
2022
// operand that we're changing, but handle bulk updates efficiently.
2023
if (NumUpdated == 1) {
2024
unsigned OperandToUpdate = U - OperandList;
2025
assert(getOperand(OperandToUpdate) == From &&
2026
"ReplaceAllUsesWith broken!");
2027
setOperand(OperandToUpdate, ToC);
2029
for (unsigned i = 0, e = getNumOperands(); i != e; ++i)
2030
if (getOperand(i) == From)
2037
// Otherwise, I do need to replace this with an existing value.
2038
assert(Replacement != this && "I didn't contain From!");
2040
// Everyone using this now uses the replacement.
2041
uncheckedReplaceAllUsesWith(Replacement);
2043
// Delete the old constant!
2047
void ConstantStruct::replaceUsesOfWithOnConstant(Value *From, Value *To,
2049
assert(isa<Constant>(To) && "Cannot make Constant refer to non-constant!");
2050
Constant *ToC = cast<Constant>(To);
2052
unsigned OperandToUpdate = U-OperandList;
2053
assert(getOperand(OperandToUpdate) == From && "ReplaceAllUsesWith broken!");
2055
std::pair<LLVMContextImpl::StructConstantsTy::MapKey, ConstantStruct*> Lookup;
2056
Lookup.first.first = getType();
2057
Lookup.second = this;
2058
std::vector<Constant*> &Values = Lookup.first.second;
2059
Values.reserve(getNumOperands()); // Build replacement struct.
2062
// Fill values with the modified operands of the constant struct. Also,
2063
// compute whether this turns into an all-zeros struct.
2064
bool isAllZeros = false;
2065
if (!ToC->isNullValue()) {
2066
for (Use *O = OperandList, *E = OperandList + getNumOperands(); O != E; ++O)
2067
Values.push_back(cast<Constant>(O->get()));
2070
for (Use *O = OperandList, *E = OperandList+getNumOperands(); O != E; ++O) {
2071
Constant *Val = cast<Constant>(O->get());
2072
Values.push_back(Val);
2073
if (isAllZeros) isAllZeros = Val->isNullValue();
2076
Values[OperandToUpdate] = ToC;
2078
LLVMContext &Context = getType()->getContext();
2079
LLVMContextImpl *pImpl = Context.pImpl;
2081
Constant *Replacement = 0;
2083
Replacement = ConstantAggregateZero::get(getType());
2085
// Check to see if we have this array type already.
2087
LLVMContextImpl::StructConstantsTy::MapTy::iterator I =
2088
pImpl->StructConstants.InsertOrGetItem(Lookup, Exists);
2091
Replacement = I->second;
2093
// Okay, the new shape doesn't exist in the system yet. Instead of
2094
// creating a new constant struct, inserting it, replaceallusesof'ing the
2095
// old with the new, then deleting the old... just update the current one
2097
pImpl->StructConstants.MoveConstantToNewSlot(this, I);
2099
// Update to the new value.
2100
setOperand(OperandToUpdate, ToC);
2105
assert(Replacement != this && "I didn't contain From!");
2107
// Everyone using this now uses the replacement.
2108
uncheckedReplaceAllUsesWith(Replacement);
2110
// Delete the old constant!
2114
void ConstantUnion::replaceUsesOfWithOnConstant(Value *From, Value *To,
2116
assert(isa<Constant>(To) && "Cannot make Constant refer to non-constant!");
2117
Constant *ToC = cast<Constant>(To);
2119
assert(U == OperandList && "Union constants can only have one use!");
2120
assert(getNumOperands() == 1 && "Union constants can only have one use!");
2121
assert(getOperand(0) == From && "ReplaceAllUsesWith broken!");
2123
std::pair<LLVMContextImpl::UnionConstantsTy::MapKey, ConstantUnion*> Lookup;
2124
Lookup.first.first = getType();
2125
Lookup.second = this;
2126
Lookup.first.second = ToC;
2128
LLVMContext &Context = getType()->getContext();
2129
LLVMContextImpl *pImpl = Context.pImpl;
2131
Constant *Replacement = 0;
2132
if (ToC->isNullValue()) {
2133
Replacement = ConstantAggregateZero::get(getType());
2135
// Check to see if we have this union type already.
2137
LLVMContextImpl::UnionConstantsTy::MapTy::iterator I =
2138
pImpl->UnionConstants.InsertOrGetItem(Lookup, Exists);
2141
Replacement = I->second;
2143
// Okay, the new shape doesn't exist in the system yet. Instead of
2144
// creating a new constant union, inserting it, replaceallusesof'ing the
2145
// old with the new, then deleting the old... just update the current one
2147
pImpl->UnionConstants.MoveConstantToNewSlot(this, I);
2149
// Update to the new value.
2155
assert(Replacement != this && "I didn't contain From!");
2157
// Everyone using this now uses the replacement.
2158
uncheckedReplaceAllUsesWith(Replacement);
2160
// Delete the old constant!
2164
void ConstantVector::replaceUsesOfWithOnConstant(Value *From, Value *To,
2166
assert(isa<Constant>(To) && "Cannot make Constant refer to non-constant!");
2168
std::vector<Constant*> Values;
2169
Values.reserve(getNumOperands()); // Build replacement array...
2170
for (unsigned i = 0, e = getNumOperands(); i != e; ++i) {
2171
Constant *Val = getOperand(i);
2172
if (Val == From) Val = cast<Constant>(To);
2173
Values.push_back(Val);
2176
Constant *Replacement = get(getType(), Values);
2177
assert(Replacement != this && "I didn't contain From!");
2179
// Everyone using this now uses the replacement.
2180
uncheckedReplaceAllUsesWith(Replacement);
2182
// Delete the old constant!
2186
void ConstantExpr::replaceUsesOfWithOnConstant(Value *From, Value *ToV,
2188
assert(isa<Constant>(ToV) && "Cannot make Constant refer to non-constant!");
2189
Constant *To = cast<Constant>(ToV);
2191
Constant *Replacement = 0;
2192
if (getOpcode() == Instruction::GetElementPtr) {
2193
SmallVector<Constant*, 8> Indices;
2194
Constant *Pointer = getOperand(0);
2195
Indices.reserve(getNumOperands()-1);
2196
if (Pointer == From) Pointer = To;
2198
for (unsigned i = 1, e = getNumOperands(); i != e; ++i) {
2199
Constant *Val = getOperand(i);
2200
if (Val == From) Val = To;
2201
Indices.push_back(Val);
2203
Replacement = ConstantExpr::getGetElementPtr(Pointer,
2204
&Indices[0], Indices.size());
2205
} else if (getOpcode() == Instruction::ExtractValue) {
2206
Constant *Agg = getOperand(0);
2207
if (Agg == From) Agg = To;
2209
const SmallVector<unsigned, 4> &Indices = getIndices();
2210
Replacement = ConstantExpr::getExtractValue(Agg,
2211
&Indices[0], Indices.size());
2212
} else if (getOpcode() == Instruction::InsertValue) {
2213
Constant *Agg = getOperand(0);
2214
Constant *Val = getOperand(1);
2215
if (Agg == From) Agg = To;
2216
if (Val == From) Val = To;
2218
const SmallVector<unsigned, 4> &Indices = getIndices();
2219
Replacement = ConstantExpr::getInsertValue(Agg, Val,
2220
&Indices[0], Indices.size());
2221
} else if (isCast()) {
2222
assert(getOperand(0) == From && "Cast only has one use!");
2223
Replacement = ConstantExpr::getCast(getOpcode(), To, getType());
2224
} else if (getOpcode() == Instruction::Select) {
2225
Constant *C1 = getOperand(0);
2226
Constant *C2 = getOperand(1);
2227
Constant *C3 = getOperand(2);
2228
if (C1 == From) C1 = To;
2229
if (C2 == From) C2 = To;
2230
if (C3 == From) C3 = To;
2231
Replacement = ConstantExpr::getSelect(C1, C2, C3);
2232
} else if (getOpcode() == Instruction::ExtractElement) {
2233
Constant *C1 = getOperand(0);
2234
Constant *C2 = getOperand(1);
2235
if (C1 == From) C1 = To;
2236
if (C2 == From) C2 = To;
2237
Replacement = ConstantExpr::getExtractElement(C1, C2);
2238
} else if (getOpcode() == Instruction::InsertElement) {
2239
Constant *C1 = getOperand(0);
2240
Constant *C2 = getOperand(1);
2241
Constant *C3 = getOperand(1);
2242
if (C1 == From) C1 = To;
2243
if (C2 == From) C2 = To;
2244
if (C3 == From) C3 = To;
2245
Replacement = ConstantExpr::getInsertElement(C1, C2, C3);
2246
} else if (getOpcode() == Instruction::ShuffleVector) {
2247
Constant *C1 = getOperand(0);
2248
Constant *C2 = getOperand(1);
2249
Constant *C3 = getOperand(2);
2250
if (C1 == From) C1 = To;
2251
if (C2 == From) C2 = To;
2252
if (C3 == From) C3 = To;
2253
Replacement = ConstantExpr::getShuffleVector(C1, C2, C3);
2254
} else if (isCompare()) {
2255
Constant *C1 = getOperand(0);
2256
Constant *C2 = getOperand(1);
2257
if (C1 == From) C1 = To;
2258
if (C2 == From) C2 = To;
2259
if (getOpcode() == Instruction::ICmp)
2260
Replacement = ConstantExpr::getICmp(getPredicate(), C1, C2);
2262
assert(getOpcode() == Instruction::FCmp);
2263
Replacement = ConstantExpr::getFCmp(getPredicate(), C1, C2);
2265
} else if (getNumOperands() == 2) {
2266
Constant *C1 = getOperand(0);
2267
Constant *C2 = getOperand(1);
2268
if (C1 == From) C1 = To;
2269
if (C2 == From) C2 = To;
2270
Replacement = ConstantExpr::get(getOpcode(), C1, C2, SubclassOptionalData);
2272
llvm_unreachable("Unknown ConstantExpr type!");
2276
assert(Replacement != this && "I didn't contain From!");
2278
// Everyone using this now uses the replacement.
2279
uncheckedReplaceAllUsesWith(Replacement);
2281
// Delete the old constant!
added
removed
libclamav/c++/llvm/lib/VMCore/Constants.cpp
