[llvm] [X86] Rewrite MOVUPD to MOVUPS in X86FixupInstTuning (PR #217676)

[via llvm-commits]

AZero13 wrote:

The patch also transforms MOVUPDrm and MOVUPDmr, so I would add explicit MIR tests for those two forms as well. The switch definitely contains those transformations, but testing all three transformed operand forms would make the PR more complete.

https://github.com/llvm/llvm-project/pull/217676