[llvm] [MachineLICM] Rematerialize instructions that may be hoisted before LICM (PR #158479)

[via llvm-commits]

https://github.com/hzwangchaochen commented:

Will this patch be merged into the LLVM main? The issue I encountered can be resolved by using `-mllvm --sink-insts-before-licm=1` using your patch.

https://github.com/llvm/llvm-project/pull/158479