[X86] Remove some isel patterns that shouldn't be possible.

These included a bitcast of a load from v4f32 to v2f64, but DAG combine should have already changed the type of the load to remove the cast.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@344573 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed