[llvm] [GVN] Load-store forwaring of scalable store to fixed load. (PR #124748)

[Nikita Popov via llvm-commits]

https://github.com/nikic commented:

Looks reasonable from a cursory look.

I think this could be straightforwardly generalized to the case where store >= load rather than store == load (in which case we don't need to know vscale exactly, just the minimum). In that case it's still correct to extract the prefix.

https://github.com/llvm/llvm-project/pull/124748