[llvm] SelectionDAG store merging default implementations are unreasonable #90714 (PR #131424)

[Nikita Popov via llvm-commits]

nikic wrote:

Though from a very cursory look, I doubt this makes sense. This predicate just checks whether store merging is attempted at all, there are more checks (isTypeLegal, canMergeStoresTo, allowsMemoryAccess) before actually doing the merge. Possibly your target is not handling some of these correctly?

https://github.com/llvm/llvm-project/pull/131424