[llvm] [GISel][CombinerHelper] Push freeze through non-poison-producing operands (PR #90618)

[Dhruv Chawla via llvm-commits]

dc03-work wrote:

> https://github.com/llvm/llvm-project/blob/f0cc3735217dd0da36ed14b65823bcb0d289fea6/llvm/lib/Transforms/InstCombine/InstructionCombining.cpp#L4420
> 
> 
> is missing.

This does not appear to be supported in GlobalISel.

https://github.com/llvm/llvm-project/pull/90618