Canonicalize X86ISD::MOVDDUP nodes to v2f64 to make sure all cases match. Also eliminate unneeded isel patterns. rdar://8520311

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@115977 91177308-0d34-0410-b5e6-96231b3b80d8
3 files changed