36cbdaa163
When reassociating GEPs, we can only keep inbounds if both original GEPs were inbounds, and their offsets have the same sign. For the sake of simplicity, I only handle the case where both offsets are non-negative here. It would probably be fine to just not preserve inbounds at all here, but as I don't see a compile-time impact for adding the isKnownNonNegative() calls I went with this more conservative approach. Fixes https://github.com/llvm/llvm-project/issues/44206. Differential Revision: https://reviews.llvm.org/D126687