llvm-project

29555ad5 - [InstCombine] Improve inbounds preservation for ADD+GEP -> GEP+GEP (#135155)

[InstCombine] Improve inbounds preservation for ADD+GEP -> GEP+GEP (#135155) Given that we have a "add nuw" and a "getelementptr inbounds nuw" like this: %idx = add nuw i64 %idx1, %idx2 %gep = getelementptr inbounds nuw i32, ptr %ptr, i64 %idx Then we can preserve the "inbounds nuw" flag when transforming that into two getelementptr instructions: %gep1 = getelementptr inbounds nuw i32, ptr %ptr, i64 %idx1 %gep = getelementptr inbounds nuw i32, ptr %ptr, i64 %idx2 Similarly for just having "nuw", and "nusw nuw" instead of "inbounds nuw" on the getelementptr. Proof: https://alive2.llvm.org/ce/z/QSweWW