1597432fbe53bda0069b0ad13e5ad57ae0ee7ee45Richard Osborne//===-- XCoreLowerThreadLocal - Lower thread local variables --------------===// 2597432fbe53bda0069b0ad13e5ad57ae0ee7ee45Richard Osborne// 3597432fbe53bda0069b0ad13e5ad57ae0ee7ee45Richard Osborne// The LLVM Compiler Infrastructure 4597432fbe53bda0069b0ad13e5ad57ae0ee7ee45Richard Osborne// 5597432fbe53bda0069b0ad13e5ad57ae0ee7ee45Richard Osborne// This file is distributed under the University of Illinois Open Source 6597432fbe53bda0069b0ad13e5ad57ae0ee7ee45Richard Osborne// License. See LICENSE.TXT for details. 7597432fbe53bda0069b0ad13e5ad57ae0ee7ee45Richard Osborne// 8597432fbe53bda0069b0ad13e5ad57ae0ee7ee45Richard Osborne//===----------------------------------------------------------------------===// 9597432fbe53bda0069b0ad13e5ad57ae0ee7ee45Richard Osborne/// 10597432fbe53bda0069b0ad13e5ad57ae0ee7ee45Richard Osborne/// \file 11597432fbe53bda0069b0ad13e5ad57ae0ee7ee45Richard Osborne/// \brief This file contains a pass that lowers thread local variables on the 12597432fbe53bda0069b0ad13e5ad57ae0ee7ee45Richard Osborne/// XCore. 13597432fbe53bda0069b0ad13e5ad57ae0ee7ee45Richard Osborne/// 14597432fbe53bda0069b0ad13e5ad57ae0ee7ee45Richard Osborne//===----------------------------------------------------------------------===// 15597432fbe53bda0069b0ad13e5ad57ae0ee7ee45Richard Osborne 16597432fbe53bda0069b0ad13e5ad57ae0ee7ee45Richard Osborne#include "XCore.h" 17597432fbe53bda0069b0ad13e5ad57ae0ee7ee45Richard Osborne#include "llvm/IR/Constants.h" 18597432fbe53bda0069b0ad13e5ad57ae0ee7ee45Richard Osborne#include "llvm/IR/DerivedTypes.h" 19597432fbe53bda0069b0ad13e5ad57ae0ee7ee45Richard Osborne#include "llvm/IR/GlobalVariable.h" 20597432fbe53bda0069b0ad13e5ad57ae0ee7ee45Richard Osborne#include "llvm/IR/IRBuilder.h" 2136b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines#include "llvm/IR/Intrinsics.h" 22597432fbe53bda0069b0ad13e5ad57ae0ee7ee45Richard Osborne#include "llvm/IR/Module.h" 2336b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines#include "llvm/IR/NoFolder.h" 2436b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines#include "llvm/IR/ValueHandle.h" 25597432fbe53bda0069b0ad13e5ad57ae0ee7ee45Richard Osborne#include "llvm/Pass.h" 26597432fbe53bda0069b0ad13e5ad57ae0ee7ee45Richard Osborne#include "llvm/Support/CommandLine.h" 27fb312f9f5a9f8cd8be1dbeaf011768e186eb8f98Robert Lytton#include "llvm/Transforms/Utils/BasicBlockUtils.h" 28597432fbe53bda0069b0ad13e5ad57ae0ee7ee45Richard Osborne 29597432fbe53bda0069b0ad13e5ad57ae0ee7ee45Richard Osborne#define DEBUG_TYPE "xcore-lower-thread-local" 30597432fbe53bda0069b0ad13e5ad57ae0ee7ee45Richard Osborne 31597432fbe53bda0069b0ad13e5ad57ae0ee7ee45Richard Osborneusing namespace llvm; 32597432fbe53bda0069b0ad13e5ad57ae0ee7ee45Richard Osborne 33597432fbe53bda0069b0ad13e5ad57ae0ee7ee45Richard Osbornestatic cl::opt<unsigned> MaxThreads( 34597432fbe53bda0069b0ad13e5ad57ae0ee7ee45Richard Osborne "xcore-max-threads", cl::Optional, 35597432fbe53bda0069b0ad13e5ad57ae0ee7ee45Richard Osborne cl::desc("Maximum number of threads (for emulation thread-local storage)"), 36597432fbe53bda0069b0ad13e5ad57ae0ee7ee45Richard Osborne cl::Hidden, cl::value_desc("number"), cl::init(8)); 37597432fbe53bda0069b0ad13e5ad57ae0ee7ee45Richard Osborne 38597432fbe53bda0069b0ad13e5ad57ae0ee7ee45Richard Osbornenamespace { 39597432fbe53bda0069b0ad13e5ad57ae0ee7ee45Richard Osborne /// Lowers thread local variables on the XCore. Each thread local variable is 40597432fbe53bda0069b0ad13e5ad57ae0ee7ee45Richard Osborne /// expanded to an array of n elements indexed by the thread ID where n is the 41597432fbe53bda0069b0ad13e5ad57ae0ee7ee45Richard Osborne /// fixed number hardware threads supported by the device. 42597432fbe53bda0069b0ad13e5ad57ae0ee7ee45Richard Osborne struct XCoreLowerThreadLocal : public ModulePass { 43597432fbe53bda0069b0ad13e5ad57ae0ee7ee45Richard Osborne static char ID; 44597432fbe53bda0069b0ad13e5ad57ae0ee7ee45Richard Osborne 45597432fbe53bda0069b0ad13e5ad57ae0ee7ee45Richard Osborne XCoreLowerThreadLocal() : ModulePass(ID) { 46597432fbe53bda0069b0ad13e5ad57ae0ee7ee45Richard Osborne initializeXCoreLowerThreadLocalPass(*PassRegistry::getPassRegistry()); 47597432fbe53bda0069b0ad13e5ad57ae0ee7ee45Richard Osborne } 48597432fbe53bda0069b0ad13e5ad57ae0ee7ee45Richard Osborne 49597432fbe53bda0069b0ad13e5ad57ae0ee7ee45Richard Osborne bool lowerGlobal(GlobalVariable *GV); 50597432fbe53bda0069b0ad13e5ad57ae0ee7ee45Richard Osborne 51dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines bool runOnModule(Module &M) override; 52597432fbe53bda0069b0ad13e5ad57ae0ee7ee45Richard Osborne }; 53597432fbe53bda0069b0ad13e5ad57ae0ee7ee45Richard Osborne} 54597432fbe53bda0069b0ad13e5ad57ae0ee7ee45Richard Osborne 55597432fbe53bda0069b0ad13e5ad57ae0ee7ee45Richard Osbornechar XCoreLowerThreadLocal::ID = 0; 56597432fbe53bda0069b0ad13e5ad57ae0ee7ee45Richard Osborne 57597432fbe53bda0069b0ad13e5ad57ae0ee7ee45Richard OsborneINITIALIZE_PASS(XCoreLowerThreadLocal, "xcore-lower-thread-local", 58597432fbe53bda0069b0ad13e5ad57ae0ee7ee45Richard Osborne "Lower thread local variables", false, false) 59597432fbe53bda0069b0ad13e5ad57ae0ee7ee45Richard Osborne 60597432fbe53bda0069b0ad13e5ad57ae0ee7ee45Richard OsborneModulePass *llvm::createXCoreLowerThreadLocalPass() { 61597432fbe53bda0069b0ad13e5ad57ae0ee7ee45Richard Osborne return new XCoreLowerThreadLocal(); 62597432fbe53bda0069b0ad13e5ad57ae0ee7ee45Richard Osborne} 63597432fbe53bda0069b0ad13e5ad57ae0ee7ee45Richard Osborne 64597432fbe53bda0069b0ad13e5ad57ae0ee7ee45Richard Osbornestatic ArrayType *createLoweredType(Type *OriginalType) { 65597432fbe53bda0069b0ad13e5ad57ae0ee7ee45Richard Osborne return ArrayType::get(OriginalType, MaxThreads); 66597432fbe53bda0069b0ad13e5ad57ae0ee7ee45Richard Osborne} 67597432fbe53bda0069b0ad13e5ad57ae0ee7ee45Richard Osborne 68597432fbe53bda0069b0ad13e5ad57ae0ee7ee45Richard Osbornestatic Constant * 69597432fbe53bda0069b0ad13e5ad57ae0ee7ee45Richard OsbornecreateLoweredInitializer(ArrayType *NewType, Constant *OriginalInitializer) { 70597432fbe53bda0069b0ad13e5ad57ae0ee7ee45Richard Osborne SmallVector<Constant *, 8> Elements(MaxThreads); 71597432fbe53bda0069b0ad13e5ad57ae0ee7ee45Richard Osborne for (unsigned i = 0; i != MaxThreads; ++i) { 72597432fbe53bda0069b0ad13e5ad57ae0ee7ee45Richard Osborne Elements[i] = OriginalInitializer; 73597432fbe53bda0069b0ad13e5ad57ae0ee7ee45Richard Osborne } 74597432fbe53bda0069b0ad13e5ad57ae0ee7ee45Richard Osborne return ConstantArray::get(NewType, Elements); 75597432fbe53bda0069b0ad13e5ad57ae0ee7ee45Richard Osborne} 76597432fbe53bda0069b0ad13e5ad57ae0ee7ee45Richard Osborne 7771537c178303c9d3f44aa0b9e0de167a7d670c77Robert Lyttonstatic Instruction * 7871537c178303c9d3f44aa0b9e0de167a7d670c77Robert LyttoncreateReplacementInstr(ConstantExpr *CE, Instruction *Instr) { 7971537c178303c9d3f44aa0b9e0de167a7d670c77Robert Lytton IRBuilder<true,NoFolder> Builder(Instr); 8071537c178303c9d3f44aa0b9e0de167a7d670c77Robert Lytton unsigned OpCode = CE->getOpcode(); 8171537c178303c9d3f44aa0b9e0de167a7d670c77Robert Lytton switch (OpCode) { 8271537c178303c9d3f44aa0b9e0de167a7d670c77Robert Lytton case Instruction::GetElementPtr: { 8371537c178303c9d3f44aa0b9e0de167a7d670c77Robert Lytton SmallVector<Value *,4> CEOpVec(CE->op_begin(), CE->op_end()); 8471537c178303c9d3f44aa0b9e0de167a7d670c77Robert Lytton ArrayRef<Value *> CEOps(CEOpVec); 8571537c178303c9d3f44aa0b9e0de167a7d670c77Robert Lytton return dyn_cast<Instruction>(Builder.CreateInBoundsGEP(CEOps[0], 8671537c178303c9d3f44aa0b9e0de167a7d670c77Robert Lytton CEOps.slice(1))); 8771537c178303c9d3f44aa0b9e0de167a7d670c77Robert Lytton } 8871537c178303c9d3f44aa0b9e0de167a7d670c77Robert Lytton case Instruction::Add: 8971537c178303c9d3f44aa0b9e0de167a7d670c77Robert Lytton case Instruction::Sub: 9071537c178303c9d3f44aa0b9e0de167a7d670c77Robert Lytton case Instruction::Mul: 9171537c178303c9d3f44aa0b9e0de167a7d670c77Robert Lytton case Instruction::UDiv: 9271537c178303c9d3f44aa0b9e0de167a7d670c77Robert Lytton case Instruction::SDiv: 9371537c178303c9d3f44aa0b9e0de167a7d670c77Robert Lytton case Instruction::FDiv: 9471537c178303c9d3f44aa0b9e0de167a7d670c77Robert Lytton case Instruction::URem: 9571537c178303c9d3f44aa0b9e0de167a7d670c77Robert Lytton case Instruction::SRem: 9671537c178303c9d3f44aa0b9e0de167a7d670c77Robert Lytton case Instruction::FRem: 9771537c178303c9d3f44aa0b9e0de167a7d670c77Robert Lytton case Instruction::Shl: 9871537c178303c9d3f44aa0b9e0de167a7d670c77Robert Lytton case Instruction::LShr: 9971537c178303c9d3f44aa0b9e0de167a7d670c77Robert Lytton case Instruction::AShr: 10071537c178303c9d3f44aa0b9e0de167a7d670c77Robert Lytton case Instruction::And: 10171537c178303c9d3f44aa0b9e0de167a7d670c77Robert Lytton case Instruction::Or: 10271537c178303c9d3f44aa0b9e0de167a7d670c77Robert Lytton case Instruction::Xor: 10371537c178303c9d3f44aa0b9e0de167a7d670c77Robert Lytton return dyn_cast<Instruction>( 10471537c178303c9d3f44aa0b9e0de167a7d670c77Robert Lytton Builder.CreateBinOp((Instruction::BinaryOps)OpCode, 10571537c178303c9d3f44aa0b9e0de167a7d670c77Robert Lytton CE->getOperand(0), CE->getOperand(1), 10671537c178303c9d3f44aa0b9e0de167a7d670c77Robert Lytton CE->getName())); 10771537c178303c9d3f44aa0b9e0de167a7d670c77Robert Lytton case Instruction::Trunc: 10871537c178303c9d3f44aa0b9e0de167a7d670c77Robert Lytton case Instruction::ZExt: 10971537c178303c9d3f44aa0b9e0de167a7d670c77Robert Lytton case Instruction::SExt: 11071537c178303c9d3f44aa0b9e0de167a7d670c77Robert Lytton case Instruction::FPToUI: 11171537c178303c9d3f44aa0b9e0de167a7d670c77Robert Lytton case Instruction::FPToSI: 11271537c178303c9d3f44aa0b9e0de167a7d670c77Robert Lytton case Instruction::UIToFP: 11371537c178303c9d3f44aa0b9e0de167a7d670c77Robert Lytton case Instruction::SIToFP: 11471537c178303c9d3f44aa0b9e0de167a7d670c77Robert Lytton case Instruction::FPTrunc: 11571537c178303c9d3f44aa0b9e0de167a7d670c77Robert Lytton case Instruction::FPExt: 11671537c178303c9d3f44aa0b9e0de167a7d670c77Robert Lytton case Instruction::PtrToInt: 11771537c178303c9d3f44aa0b9e0de167a7d670c77Robert Lytton case Instruction::IntToPtr: 11871537c178303c9d3f44aa0b9e0de167a7d670c77Robert Lytton case Instruction::BitCast: 11971537c178303c9d3f44aa0b9e0de167a7d670c77Robert Lytton return dyn_cast<Instruction>( 12071537c178303c9d3f44aa0b9e0de167a7d670c77Robert Lytton Builder.CreateCast((Instruction::CastOps)OpCode, 12171537c178303c9d3f44aa0b9e0de167a7d670c77Robert Lytton CE->getOperand(0), CE->getType(), 12271537c178303c9d3f44aa0b9e0de167a7d670c77Robert Lytton CE->getName())); 12371537c178303c9d3f44aa0b9e0de167a7d670c77Robert Lytton default: 1247b80d9233a0a69c47d1e5ebe647951349ed166e8Aaron Ballman llvm_unreachable("Unhandled constant expression!\n"); 12571537c178303c9d3f44aa0b9e0de167a7d670c77Robert Lytton } 12671537c178303c9d3f44aa0b9e0de167a7d670c77Robert Lytton} 127597432fbe53bda0069b0ad13e5ad57ae0ee7ee45Richard Osborne 128fb312f9f5a9f8cd8be1dbeaf011768e186eb8f98Robert Lyttonstatic bool replaceConstantExprOp(ConstantExpr *CE, Pass *P) { 12971537c178303c9d3f44aa0b9e0de167a7d670c77Robert Lytton do { 13036b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines SmallVector<WeakVH,8> WUsers(CE->user_begin(), CE->user_end()); 131fb312f9f5a9f8cd8be1dbeaf011768e186eb8f98Robert Lytton std::sort(WUsers.begin(), WUsers.end()); 132fb312f9f5a9f8cd8be1dbeaf011768e186eb8f98Robert Lytton WUsers.erase(std::unique(WUsers.begin(), WUsers.end()), WUsers.end()); 13371537c178303c9d3f44aa0b9e0de167a7d670c77Robert Lytton while (!WUsers.empty()) 13471537c178303c9d3f44aa0b9e0de167a7d670c77Robert Lytton if (WeakVH WU = WUsers.pop_back_val()) { 135fb312f9f5a9f8cd8be1dbeaf011768e186eb8f98Robert Lytton if (PHINode *PN = dyn_cast<PHINode>(WU)) { 136fb312f9f5a9f8cd8be1dbeaf011768e186eb8f98Robert Lytton for (int I = 0, E = PN->getNumIncomingValues(); I < E; ++I) 137fb312f9f5a9f8cd8be1dbeaf011768e186eb8f98Robert Lytton if (PN->getIncomingValue(I) == CE) { 138fb312f9f5a9f8cd8be1dbeaf011768e186eb8f98Robert Lytton BasicBlock *PredBB = PN->getIncomingBlock(I); 139fb312f9f5a9f8cd8be1dbeaf011768e186eb8f98Robert Lytton if (PredBB->getTerminator()->getNumSuccessors() > 1) 140fb312f9f5a9f8cd8be1dbeaf011768e186eb8f98Robert Lytton PredBB = SplitEdge(PredBB, PN->getParent(), P); 141fb312f9f5a9f8cd8be1dbeaf011768e186eb8f98Robert Lytton Instruction *InsertPos = PredBB->getTerminator(); 142fb312f9f5a9f8cd8be1dbeaf011768e186eb8f98Robert Lytton Instruction *NewInst = createReplacementInstr(CE, InsertPos); 143fb312f9f5a9f8cd8be1dbeaf011768e186eb8f98Robert Lytton PN->setOperand(I, NewInst); 144fb312f9f5a9f8cd8be1dbeaf011768e186eb8f98Robert Lytton } 145fb312f9f5a9f8cd8be1dbeaf011768e186eb8f98Robert Lytton } else if (Instruction *Instr = dyn_cast<Instruction>(WU)) { 14671537c178303c9d3f44aa0b9e0de167a7d670c77Robert Lytton Instruction *NewInst = createReplacementInstr(CE, Instr); 14771537c178303c9d3f44aa0b9e0de167a7d670c77Robert Lytton Instr->replaceUsesOfWith(CE, NewInst); 14871537c178303c9d3f44aa0b9e0de167a7d670c77Robert Lytton } else { 14971537c178303c9d3f44aa0b9e0de167a7d670c77Robert Lytton ConstantExpr *CExpr = dyn_cast<ConstantExpr>(WU); 150fb312f9f5a9f8cd8be1dbeaf011768e186eb8f98Robert Lytton if (!CExpr || !replaceConstantExprOp(CExpr, P)) 15171537c178303c9d3f44aa0b9e0de167a7d670c77Robert Lytton return false; 15271537c178303c9d3f44aa0b9e0de167a7d670c77Robert Lytton } 15371537c178303c9d3f44aa0b9e0de167a7d670c77Robert Lytton } 15436b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines } while (CE->hasNUsesOrMore(1)); // We need to check because a recursive 15536b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines // sibling may have used 'CE' when createReplacementInstr was called. 15671537c178303c9d3f44aa0b9e0de167a7d670c77Robert Lytton CE->destroyConstant(); 15771537c178303c9d3f44aa0b9e0de167a7d670c77Robert Lytton return true; 15871537c178303c9d3f44aa0b9e0de167a7d670c77Robert Lytton} 15971537c178303c9d3f44aa0b9e0de167a7d670c77Robert Lytton 160fb312f9f5a9f8cd8be1dbeaf011768e186eb8f98Robert Lyttonstatic bool rewriteNonInstructionUses(GlobalVariable *GV, Pass *P) { 16171537c178303c9d3f44aa0b9e0de167a7d670c77Robert Lytton SmallVector<WeakVH,8> WUsers; 16236b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines for (User *U : GV->users()) 16336b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines if (!isa<Instruction>(U)) 16436b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines WUsers.push_back(WeakVH(U)); 16571537c178303c9d3f44aa0b9e0de167a7d670c77Robert Lytton while (!WUsers.empty()) 16671537c178303c9d3f44aa0b9e0de167a7d670c77Robert Lytton if (WeakVH WU = WUsers.pop_back_val()) { 16771537c178303c9d3f44aa0b9e0de167a7d670c77Robert Lytton ConstantExpr *CE = dyn_cast<ConstantExpr>(WU); 168fb312f9f5a9f8cd8be1dbeaf011768e186eb8f98Robert Lytton if (!CE || !replaceConstantExprOp(CE, P)) 16971537c178303c9d3f44aa0b9e0de167a7d670c77Robert Lytton return false; 17071537c178303c9d3f44aa0b9e0de167a7d670c77Robert Lytton } 17171537c178303c9d3f44aa0b9e0de167a7d670c77Robert Lytton return true; 172597432fbe53bda0069b0ad13e5ad57ae0ee7ee45Richard Osborne} 173597432fbe53bda0069b0ad13e5ad57ae0ee7ee45Richard Osborne 174597432fbe53bda0069b0ad13e5ad57ae0ee7ee45Richard Osbornestatic bool isZeroLengthArray(Type *Ty) { 175597432fbe53bda0069b0ad13e5ad57ae0ee7ee45Richard Osborne ArrayType *AT = dyn_cast<ArrayType>(Ty); 176597432fbe53bda0069b0ad13e5ad57ae0ee7ee45Richard Osborne return AT && (AT->getNumElements() == 0); 177597432fbe53bda0069b0ad13e5ad57ae0ee7ee45Richard Osborne} 178597432fbe53bda0069b0ad13e5ad57ae0ee7ee45Richard Osborne 179597432fbe53bda0069b0ad13e5ad57ae0ee7ee45Richard Osbornebool XCoreLowerThreadLocal::lowerGlobal(GlobalVariable *GV) { 180597432fbe53bda0069b0ad13e5ad57ae0ee7ee45Richard Osborne Module *M = GV->getParent(); 181597432fbe53bda0069b0ad13e5ad57ae0ee7ee45Richard Osborne LLVMContext &Ctx = M->getContext(); 182597432fbe53bda0069b0ad13e5ad57ae0ee7ee45Richard Osborne if (!GV->isThreadLocal()) 183597432fbe53bda0069b0ad13e5ad57ae0ee7ee45Richard Osborne return false; 184597432fbe53bda0069b0ad13e5ad57ae0ee7ee45Richard Osborne 185597432fbe53bda0069b0ad13e5ad57ae0ee7ee45Richard Osborne // Skip globals that we can't lower and leave it for the backend to error. 186fb312f9f5a9f8cd8be1dbeaf011768e186eb8f98Robert Lytton if (!rewriteNonInstructionUses(GV, this) || 187597432fbe53bda0069b0ad13e5ad57ae0ee7ee45Richard Osborne !GV->getType()->isSized() || isZeroLengthArray(GV->getType())) 188597432fbe53bda0069b0ad13e5ad57ae0ee7ee45Richard Osborne return false; 189597432fbe53bda0069b0ad13e5ad57ae0ee7ee45Richard Osborne 190597432fbe53bda0069b0ad13e5ad57ae0ee7ee45Richard Osborne // Create replacement global. 191597432fbe53bda0069b0ad13e5ad57ae0ee7ee45Richard Osborne ArrayType *NewType = createLoweredType(GV->getType()->getElementType()); 192dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines Constant *NewInitializer = nullptr; 19371537c178303c9d3f44aa0b9e0de167a7d670c77Robert Lytton if (GV->hasInitializer()) 19471537c178303c9d3f44aa0b9e0de167a7d670c77Robert Lytton NewInitializer = createLoweredInitializer(NewType, 19571537c178303c9d3f44aa0b9e0de167a7d670c77Robert Lytton GV->getInitializer()); 196597432fbe53bda0069b0ad13e5ad57ae0ee7ee45Richard Osborne GlobalVariable *NewGV = 197597432fbe53bda0069b0ad13e5ad57ae0ee7ee45Richard Osborne new GlobalVariable(*M, NewType, GV->isConstant(), GV->getLinkage(), 198dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines NewInitializer, "", nullptr, 199dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines GlobalVariable::NotThreadLocal, 200597432fbe53bda0069b0ad13e5ad57ae0ee7ee45Richard Osborne GV->getType()->getAddressSpace(), 201597432fbe53bda0069b0ad13e5ad57ae0ee7ee45Richard Osborne GV->isExternallyInitialized()); 202597432fbe53bda0069b0ad13e5ad57ae0ee7ee45Richard Osborne 203597432fbe53bda0069b0ad13e5ad57ae0ee7ee45Richard Osborne // Update uses. 20436b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines SmallVector<User *, 16> Users(GV->user_begin(), GV->user_end()); 205597432fbe53bda0069b0ad13e5ad57ae0ee7ee45Richard Osborne for (unsigned I = 0, E = Users.size(); I != E; ++I) { 206597432fbe53bda0069b0ad13e5ad57ae0ee7ee45Richard Osborne User *U = Users[I]; 207597432fbe53bda0069b0ad13e5ad57ae0ee7ee45Richard Osborne Instruction *Inst = cast<Instruction>(U); 208597432fbe53bda0069b0ad13e5ad57ae0ee7ee45Richard Osborne IRBuilder<> Builder(Inst); 209597432fbe53bda0069b0ad13e5ad57ae0ee7ee45Richard Osborne Function *GetID = Intrinsic::getDeclaration(GV->getParent(), 210597432fbe53bda0069b0ad13e5ad57ae0ee7ee45Richard Osborne Intrinsic::xcore_getid); 211597432fbe53bda0069b0ad13e5ad57ae0ee7ee45Richard Osborne Value *ThreadID = Builder.CreateCall(GetID); 212597432fbe53bda0069b0ad13e5ad57ae0ee7ee45Richard Osborne SmallVector<Value *, 2> Indices; 213597432fbe53bda0069b0ad13e5ad57ae0ee7ee45Richard Osborne Indices.push_back(Constant::getNullValue(Type::getInt64Ty(Ctx))); 214597432fbe53bda0069b0ad13e5ad57ae0ee7ee45Richard Osborne Indices.push_back(ThreadID); 215597432fbe53bda0069b0ad13e5ad57ae0ee7ee45Richard Osborne Value *Addr = Builder.CreateInBoundsGEP(NewGV, Indices); 216597432fbe53bda0069b0ad13e5ad57ae0ee7ee45Richard Osborne U->replaceUsesOfWith(GV, Addr); 217597432fbe53bda0069b0ad13e5ad57ae0ee7ee45Richard Osborne } 218597432fbe53bda0069b0ad13e5ad57ae0ee7ee45Richard Osborne 219597432fbe53bda0069b0ad13e5ad57ae0ee7ee45Richard Osborne // Remove old global. 220597432fbe53bda0069b0ad13e5ad57ae0ee7ee45Richard Osborne NewGV->takeName(GV); 221597432fbe53bda0069b0ad13e5ad57ae0ee7ee45Richard Osborne GV->eraseFromParent(); 222597432fbe53bda0069b0ad13e5ad57ae0ee7ee45Richard Osborne return true; 223597432fbe53bda0069b0ad13e5ad57ae0ee7ee45Richard Osborne} 224597432fbe53bda0069b0ad13e5ad57ae0ee7ee45Richard Osborne 225597432fbe53bda0069b0ad13e5ad57ae0ee7ee45Richard Osbornebool XCoreLowerThreadLocal::runOnModule(Module &M) { 226597432fbe53bda0069b0ad13e5ad57ae0ee7ee45Richard Osborne // Find thread local globals. 227597432fbe53bda0069b0ad13e5ad57ae0ee7ee45Richard Osborne bool MadeChange = false; 228597432fbe53bda0069b0ad13e5ad57ae0ee7ee45Richard Osborne SmallVector<GlobalVariable *, 16> ThreadLocalGlobals; 229597432fbe53bda0069b0ad13e5ad57ae0ee7ee45Richard Osborne for (Module::global_iterator GVI = M.global_begin(), E = M.global_end(); 230597432fbe53bda0069b0ad13e5ad57ae0ee7ee45Richard Osborne GVI != E; ++GVI) { 231597432fbe53bda0069b0ad13e5ad57ae0ee7ee45Richard Osborne GlobalVariable *GV = GVI; 232597432fbe53bda0069b0ad13e5ad57ae0ee7ee45Richard Osborne if (GV->isThreadLocal()) 233597432fbe53bda0069b0ad13e5ad57ae0ee7ee45Richard Osborne ThreadLocalGlobals.push_back(GV); 234597432fbe53bda0069b0ad13e5ad57ae0ee7ee45Richard Osborne } 235597432fbe53bda0069b0ad13e5ad57ae0ee7ee45Richard Osborne for (unsigned I = 0, E = ThreadLocalGlobals.size(); I != E; ++I) { 236597432fbe53bda0069b0ad13e5ad57ae0ee7ee45Richard Osborne MadeChange |= lowerGlobal(ThreadLocalGlobals[I]); 237597432fbe53bda0069b0ad13e5ad57ae0ee7ee45Richard Osborne } 238597432fbe53bda0069b0ad13e5ad57ae0ee7ee45Richard Osborne return MadeChange; 239597432fbe53bda0069b0ad13e5ad57ae0ee7ee45Richard Osborne} 240