[PATCH] D32616: [X86] Add more patterns for BZHI isel

[Simon Pilgrim via Phabricator via llvm-commits]

RKSimon added a comment.

According to the AMD APM v3:

> If the value of index is greater than or equal to the operand size, index is set to (op_size-1). In this case, the CF flag is set.




https://reviews.llvm.org/D32616