[PATCH] D52426: [X86] Move X86DAGToDAGISel::matchBEXTRFromAnd() into X86ISelLowering

[Craig Topper via Phabricator via llvm-commits]

craig.topper added a comment.

I'm not sure matchBEXTRFromAnd() for BMI was ever a good idea for Intel CPUs. I took it out and got performance improvements on several benchmarks in our internal list. Only a couple regressions and one of those was on a test that's really sensitive to code layout.


Repository:
  rL LLVM

https://reviews.llvm.org/D52426