[llvm] [SLP] Sort PHIs by ExtractElements when relevant (PR #131229)

[Alexey Bataev via llvm-commits]

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+; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 5
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alexey-bataev wrote:

The new test should be added in a separate patch

https://github.com/llvm/llvm-project/pull/131229