Craig Topper 317a51e886 [X86][InstCombine] Add some simplifications for BZHI intrinsics
This intrinsic clears the upper bits starting at a specified index. If the index is a constant we can do some simplifications.

This could be in InstSimplify, but we don't handle any target specific intrinsics there today.

Differential Revision: https://reviews.llvm.org/D36069

llvm-svn: 309604
2017-07-31 18:52:15 +00:00
..
2017-07-11 06:04:59 +00:00