[Mlir-commits] [mlir] [mlir][spirv] Handle signedness casts (PR #155388)

[Jakub Kuderski]

kuhar wrote:

> So there's a problem at `%6 = builtin.unrealized_conversion_cast %in : ui8 to i8` because that should have been lowered to `spirv.Bitcast`

I think the real issue is that step 2 (after tosa to linalg) has an unresolved cast. In general, these are supposed to be inserted automatically by the dialect conversion driver and eventually cancel out. Once you start emitting those manually, this assumption no longer holds.

https://github.com/llvm/llvm-project/pull/155388