Achieve same result but use fewer lines of code.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@42985 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Transforms/Scalar/InstructionCombining.cpp b/lib/Transforms/Scalar/InstructionCombining.cpp
index 3edc86b..29223da 100644
--- a/lib/Transforms/Scalar/InstructionCombining.cpp
+++ b/lib/Transforms/Scalar/InstructionCombining.cpp
@@ -7674,14 +7674,13 @@
unsigned Align = cast<ConstantInt>(CI.getOperand(4))->getZExtValue();
PointerType *NewPtrTy = NULL;
// Destination pointer type is always i8 *
- if (Size == 8)
- NewPtrTy = PointerType::get(Type::Int64Ty);
- else if (Size == 4)
- NewPtrTy = PointerType::get(Type::Int32Ty);
- else if (Size == 2)
- NewPtrTy = PointerType::get(Type::Int16Ty);
- else if (Size == 1)
- NewPtrTy = PointerType::get(Type::Int8Ty);
+ // If Size is 8 then use Int64Ty
+ // If Size is 4 then use Int32Ty
+ // If Size is 2 then use Int16Ty
+ // If Size is 1 then use Int8Ty
+ if (Size && Size <=8 && !(Size&(Size-1)))
+ NewPtrTy = PointerType::get(IntegerType::get(Size<<3));
+
if (NewPtrTy) {
Value *Src = InsertCastBefore(Instruction::BitCast, CI.getOperand(2), NewPtrTy, CI);
Value *Dest = InsertCastBefore(Instruction::BitCast, CI.getOperand(1), NewPtrTy, CI);