[llvm] [VectorCombine] Fix invalid shuffle cost argument of foldShuffleOfSelects (PR #130281)

[via llvm-commits]

ParkHanbum wrote:

The test for `PhaseOrdering/X86` has been changed. 

The IR hasn't changed, but the variable names have changed, so update_test_check.py doesn't work, so I added the Check prefix. could let me know if it's okay to do it this way.




https://github.com/llvm/llvm-project/pull/130281