Yingwei Zheng 27bf45aa36 [InstCombine] Fix poison safety of folding shufflevector into select (#115483) ...

We are allowed to fold shufflevector into select iff the condition is
guaranteed not to be poison or the RHS is a poison.
Alive2: https://alive2.llvm.org/ce/z/28zEWR

Closes https://github.com/llvm/llvm-project/issues/115465.

2024-11-10 17:07:25 +08:00

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