diff options
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/Module/CMakeLists.txt | 1 | ||||
| -rw-r--r-- | lib/Module/Passes.h | 7 | ||||
| -rw-r--r-- | lib/Module/Scalarizer.cpp | 651 |
3 files changed, 0 insertions, 659 deletions
diff --git a/lib/Module/CMakeLists.txt b/lib/Module/CMakeLists.txt index 341af9df..5f234237 100644 --- a/lib/Module/CMakeLists.txt +++ b/lib/Module/CMakeLists.txt @@ -19,7 +19,6 @@ set(KLEE_MODULE_COMPONENT_SRCS OptNone.cpp PhiCleaner.cpp RaiseAsm.cpp - Scalarizer.cpp ) if (USE_WORKAROUND_LLVM_PR39177) diff --git a/lib/Module/Passes.h b/lib/Module/Passes.h index 6a302819..d5f8d821 100644 --- a/lib/Module/Passes.h +++ b/lib/Module/Passes.h @@ -150,13 +150,6 @@ private: llvm::BasicBlock *defaultBlock); }; -// This is the interface to a back-ported LLVM pass. -// Therefore this interface is only needed for -// LLVM 3.4. -#if LLVM_VERSION_CODE == LLVM_VERSION(3, 4) -llvm::FunctionPass *createScalarizerPass(); -#endif - /// InstructionOperandTypeCheckPass - Type checks the types of instruction /// operands to check that they conform to invariants expected by the Executor. /// diff --git a/lib/Module/Scalarizer.cpp b/lib/Module/Scalarizer.cpp deleted file mode 100644 index 0d8e1f48..00000000 --- a/lib/Module/Scalarizer.cpp +++ /dev/null @@ -1,651 +0,0 @@ -//===--- Scalarizer.cpp - Scalarize vector operations ---------------------===// -// -// The LLVM Compiler Infrastructure -// -// This file is distributed under the University of Illinois Open Source -// License. See LICENSE.TXT for details. -// -//===----------------------------------------------------------------------===// -// -// This pass converts vector operations into scalar operations, in order -// to expose optimization opportunities on the individual scalar operations. -// It is mainly intended for targets that do not have vector units, but it -// may also be useful for revectorizing code to different vector widths. -// -//===----------------------------------------------------------------------===// -#include "klee/Config/Version.h" - -// This is taken from r195471 in LLVM. This unfortunately was introduced just -// after LLVM branched for 3.4 so it has been copied into KLEE's source tree. -// We only use this for LLVM 3.4 because newer LLVM's have this pass in-tree. -#if LLVM_VERSION_CODE == LLVM_VERSION(3,4) - -#define DEBUG_TYPE "scalarizer" -#include "llvm/ADT/STLExtras.h" -#include "llvm/IR/IRBuilder.h" -#include "llvm/InstVisitor.h" -#include "llvm/Pass.h" -#include "llvm/Support/CommandLine.h" -#include "llvm/Transforms/Scalar.h" -#include "llvm/Transforms/Utils/BasicBlockUtils.h" - -using namespace llvm; - -namespace { -// Used to store the scattered form of a vector. -typedef SmallVector<Value *, 8> ValueVector; - -// Used to map a vector Value to its scattered form. We use std::map -// because we want iterators to persist across insertion and because the -// values are relatively large. -typedef std::map<Value *, ValueVector> ScatterMap; - -// Lists Instructions that have been replaced with scalar implementations, -// along with a pointer to their scattered forms. -typedef SmallVector<std::pair<Instruction *, ValueVector *>, 16> GatherList; - -// Provides a very limited vector-like interface for lazily accessing one -// component of a scattered vector or vector pointer. -class Scatterer { -public: - // Scatter V into Size components. If new instructions are needed, - // insert them before BBI in BB. If Cache is nonnull, use it to cache - // the results. - Scatterer(BasicBlock *bb, BasicBlock::iterator bbi, Value *v, - ValueVector *cachePtr = 0); - - // Return component I, creating a new Value for it if necessary. - Value *operator[](unsigned I); - - // Return the number of components. - unsigned size() const { return Size; } - -private: - BasicBlock *BB; - BasicBlock::iterator BBI; - Value *V; - ValueVector *CachePtr; - PointerType *PtrTy; - ValueVector Tmp; - unsigned Size; -}; - -// FCmpSpliiter(FCI)(Builder, X, Y, Name) uses Builder to create an FCmp -// called Name that compares X and Y in the same way as FCI. -struct FCmpSplitter { - FCmpSplitter(FCmpInst &fci) : FCI(fci) {} - Value *operator()(IRBuilder<> &Builder, Value *Op0, Value *Op1, - const Twine &Name) const { - return Builder.CreateFCmp(FCI.getPredicate(), Op0, Op1, Name); - } - FCmpInst &FCI; -}; - -// ICmpSpliiter(ICI)(Builder, X, Y, Name) uses Builder to create an ICmp -// called Name that compares X and Y in the same way as ICI. -struct ICmpSplitter { - ICmpSplitter(ICmpInst &ici) : ICI(ici) {} - Value *operator()(IRBuilder<> &Builder, Value *Op0, Value *Op1, - const Twine &Name) const { - return Builder.CreateICmp(ICI.getPredicate(), Op0, Op1, Name); - } - ICmpInst &ICI; -}; - -// BinarySpliiter(BO)(Builder, X, Y, Name) uses Builder to create -// a binary operator like BO called Name with operands X and Y. -struct BinarySplitter { - BinarySplitter(BinaryOperator &bo) : BO(bo) {} - Value *operator()(IRBuilder<> &Builder, Value *Op0, Value *Op1, - const Twine &Name) const { - return Builder.CreateBinOp(BO.getOpcode(), Op0, Op1, Name); - } - BinaryOperator &BO; -}; - -// GEPSpliiter()(Builder, X, Y, Name) uses Builder to create -// a single GEP called Name with operands X and Y. -struct GEPSplitter { - GEPSplitter() {} - Value *operator()(IRBuilder<> &Builder, Value *Op0, Value *Op1, - const Twine &Name) const { - return Builder.CreateGEP(Op0, Op1, Name); - } -}; - -// Information about a load or store that we're scalarizing. -struct VectorLayout { - VectorLayout() : VecTy(0), ElemTy(0), VecAlign(0), ElemSize(0) {} - - // Return the alignment of element I. - uint64_t getElemAlign(unsigned I) { - return MinAlign(VecAlign, I * ElemSize); - } - - // The type of the vector. - VectorType *VecTy; - - // The type of each element. - Type *ElemTy; - - // The alignment of the vector. - uint64_t VecAlign; - - // The size of each element. - uint64_t ElemSize; -}; - -class Scalarizer : public FunctionPass, - public InstVisitor<Scalarizer, bool> { -public: - static char ID; - - Scalarizer() : - FunctionPass(ID) { - // HACK: - //initializeScalarizerPass(*PassRegistry::getPassRegistry()); - } - - virtual bool doInitialization(Module &M); - virtual bool runOnFunction(Function &F); - - // InstVisitor methods. They return true if the instruction was scalarized, - // false if nothing changed. - bool visitInstruction(Instruction &) { return false; } - bool visitSelectInst(SelectInst &SI); - bool visitICmpInst(ICmpInst &); - bool visitFCmpInst(FCmpInst &); - bool visitBinaryOperator(BinaryOperator &); - bool visitGetElementPtrInst(GetElementPtrInst &); - bool visitCastInst(CastInst &); - bool visitBitCastInst(BitCastInst &); - bool visitShuffleVectorInst(ShuffleVectorInst &); - bool visitPHINode(PHINode &); - bool visitLoadInst(LoadInst &); - bool visitStoreInst(StoreInst &); - -private: - Scatterer scatter(Instruction *, Value *); - void gather(Instruction *, const ValueVector &); - bool canTransferMetadata(unsigned Kind); - void transferMetadata(Instruction *, const ValueVector &); - bool getVectorLayout(Type *, unsigned, VectorLayout &); - bool finish(); - - template<typename T> bool splitBinary(Instruction &, const T &); - - ScatterMap Scattered; - GatherList Gathered; - unsigned ParallelLoopAccessMDKind; - const DataLayout *TDL; -}; - -char Scalarizer::ID = 0; -} // end anonymous namespace - -bool ScalarizeLoadStore = true; // HACK -/* -// This is disabled by default because having separate loads and stores makes -// it more likely that the -combiner-alias-analysis limits will be reached. -static cl::opt<bool> ScalarizeLoadStore - ("scalarize-load-store", cl::Hidden, cl::init(false), - cl::desc("Allow the scalarizer pass to scalarize loads and store")); - -INITIALIZE_PASS(Scalarizer, "scalarizer", "Scalarize vector operations", - false, false) -*/ - -Scatterer::Scatterer(BasicBlock *bb, BasicBlock::iterator bbi, Value *v, - ValueVector *cachePtr) - : BB(bb), BBI(bbi), V(v), CachePtr(cachePtr) { - Type *Ty = V->getType(); - PtrTy = dyn_cast<PointerType>(Ty); - if (PtrTy) - Ty = PtrTy->getElementType(); - Size = Ty->getVectorNumElements(); - if (!CachePtr) - Tmp.resize(Size, 0); - else if (CachePtr->empty()) - CachePtr->resize(Size, 0); - else - assert(Size == CachePtr->size() && "Inconsistent vector sizes"); -} - -// Return component I, creating a new Value for it if necessary. -Value *Scatterer::operator[](unsigned I) { - ValueVector &CV = (CachePtr ? *CachePtr : Tmp); - // Try to reuse a previous value. - if (CV[I]) - return CV[I]; - IRBuilder<> Builder(BB, BBI); - if (PtrTy) { - if (!CV[0]) { - Type *Ty = - PointerType::get(PtrTy->getElementType()->getVectorElementType(), - PtrTy->getAddressSpace()); - CV[0] = Builder.CreateBitCast(V, Ty, V->getName() + ".i0"); - } - if (I != 0) - CV[I] = Builder.CreateConstGEP1_32(CV[0], I, - V->getName() + ".i" + Twine(I)); - } else { - // Search through a chain of InsertElementInsts looking for element I. - // Record other elements in the cache. The new V is still suitable - // for all uncached indices. - for (;;) { - InsertElementInst *Insert = dyn_cast<InsertElementInst>(V); - if (!Insert) - break; - ConstantInt *Idx = dyn_cast<ConstantInt>(Insert->getOperand(2)); - if (!Idx) - break; - unsigned J = Idx->getZExtValue(); - CV[J] = Insert->getOperand(1); - V = Insert->getOperand(0); - if (I == J) - return CV[J]; - } - CV[I] = Builder.CreateExtractElement(V, Builder.getInt32(I), - V->getName() + ".i" + Twine(I)); - } - return CV[I]; -} - -bool Scalarizer::doInitialization(Module &M) { - ParallelLoopAccessMDKind = - M.getContext().getMDKindID("llvm.mem.parallel_loop_access"); - return false; -} - -bool Scalarizer::runOnFunction(Function &F) { - TDL = getAnalysisIfAvailable<DataLayout>(); - for (Function::iterator BBI = F.begin(), BBE = F.end(); BBI != BBE; ++BBI) { - BasicBlock *BB = BBI; - for (BasicBlock::iterator II = BB->begin(), IE = BB->end(); II != IE;) { - Instruction *I = II; - bool Done = visit(I); - ++II; - if (Done && I->getType()->isVoidTy()) - I->eraseFromParent(); - } - } - return finish(); -} - -// Return a scattered form of V that can be accessed by Point. V must be a -// vector or a pointer to a vector. -Scatterer Scalarizer::scatter(Instruction *Point, Value *V) { - if (Argument *VArg = dyn_cast<Argument>(V)) { - // Put the scattered form of arguments in the entry block, - // so that it can be used everywhere. - Function *F = VArg->getParent(); - BasicBlock *BB = &F->getEntryBlock(); - return Scatterer(BB, BB->begin(), V, &Scattered[V]); - } - if (Instruction *VOp = dyn_cast<Instruction>(V)) { - // Put the scattered form of an instruction directly after the - // instruction. - BasicBlock *BB = VOp->getParent(); - return Scatterer(BB, llvm::next(BasicBlock::iterator(VOp)), - V, &Scattered[V]); - } - // In the fallback case, just put the scattered before Point and - // keep the result local to Point. - return Scatterer(Point->getParent(), Point, V); -} - -// Replace Op with the gathered form of the components in CV. Defer the -// deletion of Op and creation of the gathered form to the end of the pass, -// so that we can avoid creating the gathered form if all uses of Op are -// replaced with uses of CV. -void Scalarizer::gather(Instruction *Op, const ValueVector &CV) { - // Since we're not deleting Op yet, stub out its operands, so that it - // doesn't make anything live unnecessarily. - for (unsigned I = 0, E = Op->getNumOperands(); I != E; ++I) - Op->setOperand(I, UndefValue::get(Op->getOperand(I)->getType())); - - transferMetadata(Op, CV); - - // If we already have a scattered form of Op (created from ExtractElements - // of Op itself), replace them with the new form. - ValueVector &SV = Scattered[Op]; - if (!SV.empty()) { - for (unsigned I = 0, E = SV.size(); I != E; ++I) { - Instruction *Old = cast<Instruction>(SV[I]); - CV[I]->takeName(Old); - Old->replaceAllUsesWith(CV[I]); - Old->eraseFromParent(); - } - } - SV = CV; - Gathered.push_back(GatherList::value_type(Op, &SV)); -} - -// Return true if it is safe to transfer the given metadata tag from -// vector to scalar instructions. -bool Scalarizer::canTransferMetadata(unsigned Tag) { - return (Tag == LLVMContext::MD_tbaa - || Tag == LLVMContext::MD_fpmath - || Tag == LLVMContext::MD_tbaa_struct - || Tag == LLVMContext::MD_invariant_load - || Tag == ParallelLoopAccessMDKind); -} - -// Transfer metadata from Op to the instructions in CV if it is known -// to be safe to do so. -void Scalarizer::transferMetadata(Instruction *Op, const ValueVector &CV) { - SmallVector<std::pair<unsigned, MDNode *>, 4> MDs; - Op->getAllMetadataOtherThanDebugLoc(MDs); - for (unsigned I = 0, E = CV.size(); I != E; ++I) { - if (Instruction *New = dyn_cast<Instruction>(CV[I])) { - for (SmallVectorImpl<std::pair<unsigned, MDNode *> >::iterator - MI = MDs.begin(), ME = MDs.end(); MI != ME; ++MI) - if (canTransferMetadata(MI->first)) - New->setMetadata(MI->first, MI->second); - New->setDebugLoc(Op->getDebugLoc()); - } - } -} - -// Try to fill in Layout from Ty, returning true on success. Alignment is -// the alignment of the vector, or 0 if the ABI default should be used. -bool Scalarizer::getVectorLayout(Type *Ty, unsigned Alignment, - VectorLayout &Layout) { - if (!TDL) - return false; - - // Make sure we're dealing with a vector. - Layout.VecTy = dyn_cast<VectorType>(Ty); - if (!Layout.VecTy) - return false; - - // Check that we're dealing with full-byte elements. - Layout.ElemTy = Layout.VecTy->getElementType(); - if (TDL->getTypeSizeInBits(Layout.ElemTy) != - TDL->getTypeStoreSizeInBits(Layout.ElemTy)) - return false; - - if (Alignment) - Layout.VecAlign = Alignment; - else - Layout.VecAlign = TDL->getABITypeAlignment(Layout.VecTy); - Layout.ElemSize = TDL->getTypeStoreSize(Layout.ElemTy); - return true; -} - -// Scalarize two-operand instruction I, using Split(Builder, X, Y, Name) -// to create an instruction like I with operands X and Y and name Name. -template<typename Splitter> -bool Scalarizer::splitBinary(Instruction &I, const Splitter &Split) { - VectorType *VT = dyn_cast<VectorType>(I.getType()); - if (!VT) - return false; - - unsigned NumElems = VT->getNumElements(); - IRBuilder<> Builder(I.getParent(), &I); - Scatterer Op0 = scatter(&I, I.getOperand(0)); - Scatterer Op1 = scatter(&I, I.getOperand(1)); - assert(Op0.size() == NumElems && "Mismatched binary operation"); - assert(Op1.size() == NumElems && "Mismatched binary operation"); - ValueVector Res; - Res.resize(NumElems); - for (unsigned Elem = 0; Elem < NumElems; ++Elem) - Res[Elem] = Split(Builder, Op0[Elem], Op1[Elem], - I.getName() + ".i" + Twine(Elem)); - gather(&I, Res); - return true; -} - -bool Scalarizer::visitSelectInst(SelectInst &SI) { - VectorType *VT = dyn_cast<VectorType>(SI.getType()); - if (!VT) - return false; - - unsigned NumElems = VT->getNumElements(); - IRBuilder<> Builder(SI.getParent(), &SI); - Scatterer Op1 = scatter(&SI, SI.getOperand(1)); - Scatterer Op2 = scatter(&SI, SI.getOperand(2)); - assert(Op1.size() == NumElems && "Mismatched select"); - assert(Op2.size() == NumElems && "Mismatched select"); - ValueVector Res; - Res.resize(NumElems); - - if (SI.getOperand(0)->getType()->isVectorTy()) { - Scatterer Op0 = scatter(&SI, SI.getOperand(0)); - assert(Op0.size() == NumElems && "Mismatched select"); - for (unsigned I = 0; I < NumElems; ++I) - Res[I] = Builder.CreateSelect(Op0[I], Op1[I], Op2[I], - SI.getName() + ".i" + Twine(I)); - } else { - Value *Op0 = SI.getOperand(0); - for (unsigned I = 0; I < NumElems; ++I) - Res[I] = Builder.CreateSelect(Op0, Op1[I], Op2[I], - SI.getName() + ".i" + Twine(I)); - } - gather(&SI, Res); - return true; -} - -bool Scalarizer::visitICmpInst(ICmpInst &ICI) { - return splitBinary(ICI, ICmpSplitter(ICI)); -} - -bool Scalarizer::visitFCmpInst(FCmpInst &FCI) { - return splitBinary(FCI, FCmpSplitter(FCI)); -} - -bool Scalarizer::visitBinaryOperator(BinaryOperator &BO) { - return splitBinary(BO, BinarySplitter(BO)); -} - -bool Scalarizer::visitGetElementPtrInst(GetElementPtrInst &GEPI) { - return splitBinary(GEPI, GEPSplitter()); -} - -bool Scalarizer::visitCastInst(CastInst &CI) { - VectorType *VT = dyn_cast<VectorType>(CI.getDestTy()); - if (!VT) - return false; - - unsigned NumElems = VT->getNumElements(); - IRBuilder<> Builder(CI.getParent(), &CI); - Scatterer Op0 = scatter(&CI, CI.getOperand(0)); - assert(Op0.size() == NumElems && "Mismatched cast"); - ValueVector Res; - Res.resize(NumElems); - for (unsigned I = 0; I < NumElems; ++I) - Res[I] = Builder.CreateCast(CI.getOpcode(), Op0[I], VT->getElementType(), - CI.getName() + ".i" + Twine(I)); - gather(&CI, Res); - return true; -} - -bool Scalarizer::visitBitCastInst(BitCastInst &BCI) { - VectorType *DstVT = dyn_cast<VectorType>(BCI.getDestTy()); - VectorType *SrcVT = dyn_cast<VectorType>(BCI.getSrcTy()); - if (!DstVT || !SrcVT) - return false; - - unsigned DstNumElems = DstVT->getNumElements(); - unsigned SrcNumElems = SrcVT->getNumElements(); - IRBuilder<> Builder(BCI.getParent(), &BCI); - Scatterer Op0 = scatter(&BCI, BCI.getOperand(0)); - ValueVector Res; - Res.resize(DstNumElems); - - if (DstNumElems == SrcNumElems) { - for (unsigned I = 0; I < DstNumElems; ++I) - Res[I] = Builder.CreateBitCast(Op0[I], DstVT->getElementType(), - BCI.getName() + ".i" + Twine(I)); - } else if (DstNumElems > SrcNumElems) { - // <M x t1> -> <N*M x t2>. Convert each t1 to <N x t2> and copy the - // individual elements to the destination. - unsigned FanOut = DstNumElems / SrcNumElems; - Type *MidTy = VectorType::get(DstVT->getElementType(), FanOut); - unsigned ResI = 0; - for (unsigned Op0I = 0; Op0I < SrcNumElems; ++Op0I) { - Value *V = Op0[Op0I]; - Instruction *VI; - // Look through any existing bitcasts before converting to <N x t2>. - // In the best case, the resulting conversion might be a no-op. - while ((VI = dyn_cast<Instruction>(V)) && - VI->getOpcode() == Instruction::BitCast) - V = VI->getOperand(0); - V = Builder.CreateBitCast(V, MidTy, V->getName() + ".cast"); - Scatterer Mid = scatter(&BCI, V); - for (unsigned MidI = 0; MidI < FanOut; ++MidI) - Res[ResI++] = Mid[MidI]; - } - } else { - // <N*M x t1> -> <M x t2>. Convert each group of <N x t1> into a t2. - unsigned FanIn = SrcNumElems / DstNumElems; - Type *MidTy = VectorType::get(SrcVT->getElementType(), FanIn); - unsigned Op0I = 0; - for (unsigned ResI = 0; ResI < DstNumElems; ++ResI) { - Value *V = UndefValue::get(MidTy); - for (unsigned MidI = 0; MidI < FanIn; ++MidI) - V = Builder.CreateInsertElement(V, Op0[Op0I++], Builder.getInt32(MidI), - BCI.getName() + ".i" + Twine(ResI) - + ".upto" + Twine(MidI)); - Res[ResI] = Builder.CreateBitCast(V, DstVT->getElementType(), - BCI.getName() + ".i" + Twine(ResI)); - } - } - gather(&BCI, Res); - return true; -} - -bool Scalarizer::visitShuffleVectorInst(ShuffleVectorInst &SVI) { - VectorType *VT = dyn_cast<VectorType>(SVI.getType()); - if (!VT) - return false; - - unsigned NumElems = VT->getNumElements(); - Scatterer Op0 = scatter(&SVI, SVI.getOperand(0)); - Scatterer Op1 = scatter(&SVI, SVI.getOperand(1)); - ValueVector Res; - Res.resize(NumElems); - - for (unsigned I = 0; I < NumElems; ++I) { - int Selector = SVI.getMaskValue(I); - if (Selector < 0) - Res[I] = UndefValue::get(VT->getElementType()); - else if (unsigned(Selector) < Op0.size()) - Res[I] = Op0[Selector]; - else - Res[I] = Op1[Selector - Op0.size()]; - } - gather(&SVI, Res); - return true; -} - -bool Scalarizer::visitPHINode(PHINode &PHI) { - VectorType *VT = dyn_cast<VectorType>(PHI.getType()); - if (!VT) - return false; - - unsigned NumElems = VT->getNumElements(); - IRBuilder<> Builder(PHI.getParent(), &PHI); - ValueVector Res; - Res.resize(NumElems); - - unsigned NumOps = PHI.getNumOperands(); - for (unsigned I = 0; I < NumElems; ++I) - Res[I] = Builder.CreatePHI(VT->getElementType(), NumOps, - PHI.getName() + ".i" + Twine(I)); - - for (unsigned I = 0; I < NumOps; ++I) { - Scatterer Op = scatter(&PHI, PHI.getIncomingValue(I)); - BasicBlock *IncomingBlock = PHI.getIncomingBlock(I); - for (unsigned J = 0; J < NumElems; ++J) - cast<PHINode>(Res[J])->addIncoming(Op[J], IncomingBlock); - } - gather(&PHI, Res); - return true; -} - -bool Scalarizer::visitLoadInst(LoadInst &LI) { - if (!ScalarizeLoadStore) - return false; - if (!LI.isSimple()) - return false; - - VectorLayout Layout; - if (!getVectorLayout(LI.getType(), LI.getAlignment(), Layout)) - return false; - - unsigned NumElems = Layout.VecTy->getNumElements(); - IRBuilder<> Builder(LI.getParent(), &LI); - Scatterer Ptr = scatter(&LI, LI.getPointerOperand()); - ValueVector Res; - Res.resize(NumElems); - - for (unsigned I = 0; I < NumElems; ++I) - Res[I] = Builder.CreateAlignedLoad(Ptr[I], Layout.getElemAlign(I), - LI.getName() + ".i" + Twine(I)); - gather(&LI, Res); - return true; -} - -bool Scalarizer::visitStoreInst(StoreInst &SI) { - if (!ScalarizeLoadStore) - return false; - if (!SI.isSimple()) - return false; - - VectorLayout Layout; - Value *FullValue = SI.getValueOperand(); - if (!getVectorLayout(FullValue->getType(), SI.getAlignment(), Layout)) - return false; - - unsigned NumElems = Layout.VecTy->getNumElements(); - IRBuilder<> Builder(SI.getParent(), &SI); - Scatterer Ptr = scatter(&SI, SI.getPointerOperand()); - Scatterer Val = scatter(&SI, FullValue); - - ValueVector Stores; - Stores.resize(NumElems); - for (unsigned I = 0; I < NumElems; ++I) { - unsigned Align = Layout.getElemAlign(I); - Stores[I] = Builder.CreateAlignedStore(Val[I], Ptr[I], Align); - } - transferMetadata(&SI, Stores); - return true; -} - -// Delete the instructions that we scalarized. If a full vector result -// is still needed, recreate it using InsertElements. -bool Scalarizer::finish() { - if (Gathered.empty()) - return false; - for (GatherList::iterator GMI = Gathered.begin(), GME = Gathered.end(); - GMI != GME; ++GMI) { - Instruction *Op = GMI->first; - ValueVector &CV = *GMI->second; - if (!Op->use_empty()) { - // The value is still needed, so recreate it using a series of - // InsertElements. - Type *Ty = Op->getType(); - Value *Res = UndefValue::get(Ty); - unsigned Count = Ty->getVectorNumElements(); - IRBuilder<> Builder(Op->getParent(), Op); - for (unsigned I = 0; I < Count; ++I) - Res = Builder.CreateInsertElement(Res, CV[I], Builder.getInt32(I), - Op->getName() + ".upto" + Twine(I)); - Res->takeName(Op); - Op->replaceAllUsesWith(Res); - } - Op->eraseFromParent(); - } - Gathered.clear(); - Scattered.clear(); - return true; -} - -namespace klee { - llvm::FunctionPass *createScalarizerPass() { - return new Scalarizer(); - } -} - -#endif |