Nicolas Vasilache af6c3f7a63 Start a new implementation for edsc::Builder ... This CL reworks the design of EDSCs from first principles. It introduces a ValueHandle which can hold either: 1. an eagerly typed, delayed Value* 2. a precomputed Value* A ValueHandle can be manipulated with intrinsic operations a nested within a NestedBuilder. These NestedBuilder are a more idiomatic nested builder abstraction that should feel intuitive to program in C++. Notably, this abstraction does not require an AST to stage the construction of MLIR snippets from C++. Instead, the abstraction makes use of orderings between definition and declaration of ValueHandles and provides a NestedBuilder and a LoopBuilder helper classes to handle those orderings. All instruction creations are meant to use the templated ValueHandle::create<> which directly calls mlir::Builder.create<>. For now the EDSC AST and the builders live side-by-side until the C API is ported. PiperOrigin-RevId: 237030945		2019-03-29 16:59:50 -07:00
mlir	Start a new implementation for edsc::Builder	2019-03-29 16:59:50 -07:00