Alex Zinenko cc82a94aff Materialize IndexType in the API. ... Previously, index (aka affint) type was hidden under OtherType in the type API. We will need to identify and operate on values of index types in the upcoming MLFunc->CFGFunc(->LLVM) lowering passes. Materialize index type into a separate class and make it visible to LLVM RTTI hierarchy directly. Practically, index is an integer type of unknown bit width and is accetable in most places where regular integer types are. This is purely an API change that does not affect the IR. After IndexType is separated out from OtherType, the remaining "other types" are, in fact, TF-specific types only. Further renaming may be of interest. PiperOrigin-RevId: 220614026		2019-03-29 13:51:04 -07:00
mlir	Materialize IndexType in the API.	2019-03-29 13:51:04 -07:00