lib/Analysis/ValueTracking.cpp

5638       unsigned ShiftAmount = Width - 1;
5640         ShiftAmount = C->countTrailingZeros();
5644         Upper = C->ashr(ShiftAmount) + 1;
5647         Lower = C->ashr(ShiftAmount);
5659       unsigned ShiftAmount = Width - 1;
5661         ShiftAmount = C->countTrailingZeros();
5662       Lower = C->lshr(ShiftAmount);
5676           unsigned ShiftAmount = C->countLeadingOnes() - 1;
5677           Lower = C->shl(ShiftAmount);
5681           unsigned ShiftAmount = C->countLeadingZeros() - 1;
5683           Upper = C->shl(ShiftAmount) + 1;