The last assume in the test says that %B12 is 0.
The first assume says that %and1 is less than %B12.
Therefore, %and1 is unsigned less than 0...does not compute.
That means this line:
Known.Zero.setHighBits(RHSKnown.countMinLeadingZeros() + 1);
...tries to set more bits than exist.
Differential Revision: https://reviews.llvm.org/D43052
llvm-svn: 324610
a60aec1ab7