//
//===----------------------------------------------------------------------===//
-#define DEBUG_TYPE "loweratomic"
#include "llvm/Transforms/Scalar.h"
#include "llvm/IR/Function.h"
#include "llvm/IR/IRBuilder.h"
#include "llvm/Pass.h"
using namespace llvm;
+#define DEBUG_TYPE "loweratomic"
+
static bool LowerAtomicCmpXchgInst(AtomicCmpXchgInst *CXI) {
IRBuilder<> Builder(CXI->getParent(), CXI);
Value *Ptr = CXI->getPointerOperand();
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;
}
Value *Val = RMWI->getValOperand();
LoadInst *Orig = Builder.CreateLoad(Ptr);
- Value *Res = NULL;
+ Value *Res = nullptr;
switch (RMWI->getOperation()) {
default: llvm_unreachable("Unexpected RMW operation");