llvm-project

d9274cdd - [AArch64][GlobalISel] Preserve scalar type when widening atomic G_STORE (#216162)

[AArch64][GlobalISel] Preserve scalar type when widening atomic G_STORE (#216162) Use `changeElementSizeTo` instead of `changeTo` in the G_STORE legalization rule for narrow atomic stores. `changeTo` changes the type of the stored value to generic `s32`, which can be propagated to its defining instruction. For example, this can turn an integer `G_AND` into an `s32` operation and prevent it from being correctly selected. Changing only the element size preserves the value's scalar type while still widening the value as required by the legalization rule.