// fold (shl (srl x, c1), c2) -> (and (shl x, (sub c2, c1), MASK) or
// (and (srl x, (sub c1, c2), MASK)
- if (N1C && N0.getOpcode() == ISD::SRL &&
+ // Only fold this if the inner shift has no other uses -- if it does, folding
+ // this will increase the total number of instructions.
+ if (N1C && N0.getOpcode() == ISD::SRL && N0.hasOneUse() &&
N0.getOperand(1).getOpcode() == ISD::Constant) {
uint64_t c1 = cast<ConstantSDNode>(N0.getOperand(1))->getZExtValue();
if (c1 < VT.getSizeInBits()) {