add FIXME comment; NFC
llvm-svn: 265970
diff --git a/llvm/lib/Transforms/InstCombine/InstCombineShifts.cpp b/llvm/lib/Transforms/InstCombine/InstCombineShifts.cpp
index 4a563b4..08e16a7 100644
--- a/llvm/lib/Transforms/InstCombine/InstCombineShifts.cpp
+++ b/llvm/lib/Transforms/InstCombine/InstCombineShifts.cpp
@@ -62,7 +62,7 @@
Instruction *SecondShift, InstCombiner &IC,
Instruction *CxtI) {
assert(SecondShift->isLogicalShift() && "Unexpected instruction type");
-
+
// We need constant shifts.
auto *SecondShiftConst = dyn_cast<ConstantInt>(SecondShift->getOperand(1));
if (!SecondShiftConst)
@@ -256,6 +256,8 @@
BO->setHasNoSignedWrap(false);
return BO;
}
+ // FIXME: This is almost identical to the SHL case. Refactor both cases into
+ // a helper function.
case Instruction::LShr: {
BinaryOperator *BO = cast<BinaryOperator>(I);
unsigned TypeWidth = BO->getType()->getScalarSizeInBits();