[PATCH] D48768: [X86] When have BMI2, prefer shifts to clear low/high bits, rather than variable mask.

[Craig Topper via Phabricator via llvm-commits]

craig.topper added a comment.

Is it possible to reverse this as a DAG combine? I'd rather not produce 2 instructions from one pattern if we can avoid it.


Repository:
  rL LLVM

https://reviews.llvm.org/D48768