[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.

That's what i meant. I think I didn't understand this statement "It will still need to produce two instructions (which is safe, since there is one-use check on the mask)."


Repository:
  rL LLVM

https://reviews.llvm.org/D48768