[llvm] [VectorCombine] Fix duplicate freeze scheduling for shared indexes (PR #213461)

[Aditya prakash jha via llvm-commits]

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AdityaOP007 wrote:

These were additional test cases I used while validating the fix and aren't intended to be part of the final regression suite. If required I'll remove them

https://github.com/llvm/llvm-project/pull/213461