[llvm] [X86] Fix missing ByValTemporaries update in CopyViaTemp path for musttail calls (PR #190540)

[Zile Xiong via llvm-commits]

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@@ -0,0 +1,90 @@
+; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py UTC_ARGS: --version 6
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xiongzile wrote:

You're right — the existing test already covers this case after the update.
I've removed the additional test in the latest commit. Thanks!

https://github.com/llvm/llvm-project/pull/190540