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

[Phoebe Wang via llvm-commits]

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@@ -255,6 +255,18 @@ bool X86FixupInstTuningImpl::processInstruction(
     return ProcessUNPCKToIntDomain(NewOpc);
   };
 
+  // MOVUPS takes 1 less byte of code size. Only replace when
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phoebewang wrote:

MOVAPS also 1 byte less than MOVAPD

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