tree 38c12ed59c42860361647673939c0338158d5cf1
parent 2b38b84a12ff96d6862b7927f92cbdae77653deb
author Craig Topper <craig.topper@intel.com> 1555266366 +0000
committer Craig Topper <craig.topper@intel.com> 1555266366 +0000

[X86] Don't form masked vpcmp/vcmp/vptestm operations if the setcc node has more than one use.

We're better of emitting a single compare + kand rather than a compare for the
other use and a masked compare.

I'm looking into using custom instruction selection for VPTESTM to reduce the
ridiculous number of permutations of patterns in the isel table. Putting a one
use check on all masked compare folding makes load fold matching in the custom
code easier.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@358358 91177308-0d34-0410-b5e6-96231b3b80d8