[mlir][NFC] Migrate to OpAsmAttrInterface for some Builtin Attributes for alias (#128191)

After the introduction of `OpAsmAttrInterface` for alias in #124721, the
natural thought to exercise it would be migrating the MLIR existing
alias generation method, i.e. `OpAsmDialectInterface`, to use the new
interface.

There is a `BuiltinOpAsmDialectInterface` that generates aliases for
`AffineMapAttr` and `IntegerSetAttr`, and these attributes could be
migrated to use `OpAsmAttrInterface`.

However, the tricky part is that `OpAsmAttrInterface` lives in
`OpImplementation.h`. If `BuiltinAttributes.h` includes that, it would
become a cyclic inclusion.

Note that only BuiltinAttribute/Type would face such issue as outside
user can just include `OpImplementation.h` (see downstream example
https://github.com/google/heir/pull/1437)

The dependency is introduced by the fact that `OpAsmAttrInterface` uses
`OpAsmDialectInterface::AliasResult`.

The solution to is: Put the `AliasResult` in `OpAsmSupport.h` that all
interfaces can include that header safely. The API wont break as
`mlir::OpAsmDialectInterface::AliasResult` is a typedef of this class.

0 files changed, 0 insertions, 0 deletions