[GVN] missed load elimination when multiple stores contribute to a single value #61814
Description
Both GVN and NewGVN fail to perform load elimination in cases where multiple stores contribute to a single constant value.
; Function Attrs: nofree norecurse nosync nounwind define i16 @SampleFunc() local_unnamed_addr #0 { entry: %0 = load ptr, ptr @memory, align 8 %foo = getelementptr inbounds i8, ptr %0, i64 0 %foo1 = getelementptr inbounds i8, ptr %0, i64 1 store i8 7, ptr %foo, align 1 store i8 -53, ptr %foo1, align 1 %load158490 = load i16, ptr %foo, align 1 ret i16 %load158490 }