[RFC] Allow pointers as element type of `vector`

MLIR
13

Here’s a PR that adds a ScalarTypeInterface: [mlir][IR] Add `ScalarTypeInterface` and use as `VectorType` element type by matthias-springer · Pull Request #132400 · llvm/llvm-project · GitHub

Is this description accurate? I tried to summarize what was written in this thread.

    Indication that this type is a scalar type.

    The bitwidth of a scalar type is a fixed constant but may be unknown in the
    absence of data layout information.

    Scalar types are POD (plain-old-data) entities that have an in-memory
    representation: scalar values can be loaded/store from/to memory, so
    abstract types like function types or async tokens cannot be scalar types.

EDIT: I removed this sentence because it is vague and does not give a clear answer:

    Scalar types should be limited to types that can lower to something that
    egress dialects would consider a valid vector element type.