[X86] When post-processing the DAG to remove zero extending moves for YMM/ZMM, make sure the producing instruction is VEX/XOP/EVEX encoded.
If the producing instruction is legacy encoded it doesn't implicitly zero the upper bits. This is important for the SHA instructions which don't have a VEX encoded version. We might also be able to hit this with the incomplete f128 support that hasn't been ported to VEX.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@338812 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed