Mehdi Amini f61d1028fa Add a basic C API for the MLIR PassManager as well as a basic TableGen backend for creating passes ...

This is exposing the basic functionalities (create, nest, addPass, run) of
the PassManager through the C API in the new header: `include/mlir-c/Pass.h`.

In order to exercise it in the unit-test, a basic TableGen backend is
also provided to generate a simple C wrapper around the pass
constructor. It is used to expose the libTransforms passes to the C API.

Reviewed By: stellaraccident, ftynse

Differential Revision: https://reviews.llvm.org/D90667

2020-11-04 06:36:31 +00:00

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