//
//===----------------------------------------------------------------------===//
-#define DEBUG_TYPE "loweratomic"
#include "llvm/Transforms/Scalar.h"
-#include "llvm/Function.h"
-#include "llvm/IRBuilder.h"
-#include "llvm/IntrinsicInst.h"
+#include "llvm/IR/Function.h"
+#include "llvm/IR/IRBuilder.h"
+#include "llvm/IR/IntrinsicInst.h"
#include "llvm/Pass.h"
using namespace llvm;
+#define DEBUG_TYPE "loweratomic"
+
static bool LowerAtomicCmpXchgInst(AtomicCmpXchgInst *CXI) {
- IRBuilder<> Builder(CXI->getParent(), CXI);
+ IRBuilder<> Builder(CXI);
Value *Ptr = CXI->getPointerOperand();
Value *Cmp = CXI->getCompareOperand();
Value *Val = CXI->getNewValOperand();
Value *Res = Builder.CreateSelect(Equal, Val, Orig);
Builder.CreateStore(Res, Ptr);
- CXI->replaceAllUsesWith(Orig);
+ Res = Builder.CreateInsertValue(UndefValue::get(CXI->getType()), Orig, 0);
+ Res = Builder.CreateInsertValue(Res, Equal, 1);
+
+ CXI->replaceAllUsesWith(Res);
CXI->eraseFromParent();
return true;
}
static bool LowerAtomicRMWInst(AtomicRMWInst *RMWI) {
- IRBuilder<> Builder(RMWI->getParent(), RMWI);
+ IRBuilder<> Builder(RMWI);
Value *Ptr = RMWI->getPointerOperand();
Value *Val = RMWI->getValOperand();
LoadInst *Orig = Builder.CreateLoad(Ptr);
- Value *Res = NULL;
+ Value *Res = nullptr;
switch (RMWI->getOperation()) {
default: llvm_unreachable("Unexpected RMW operation");
LowerAtomic() : BasicBlockPass(ID) {
initializeLowerAtomicPass(*PassRegistry::getPassRegistry());
}
- bool runOnBasicBlock(BasicBlock &BB) {
+ bool runOnBasicBlock(BasicBlock &BB) override {
+ if (skipOptnoneFunction(BB))
+ return false;
bool Changed = false;
for (BasicBlock::iterator DI = BB.begin(), DE = BB.end(); DI != DE; ) {
- Instruction *Inst = DI++;
+ Instruction *Inst = &*DI++;
if (FenceInst *FI = dyn_cast<FenceInst>(Inst))
Changed |= LowerFenceInst(FI);
else if (AtomicCmpXchgInst *CXI = dyn_cast<AtomicCmpXchgInst>(Inst))