[mlir] support interfaces in Python bindings

Introduce the initial support for operation interfaces in C API and Python
bindings. Interfaces are a key component of MLIR's extensibility and should be
available in bindings to make use of full potential of MLIR.

This initial implementation exposes InferTypeOpInterface all the way to the
Python bindings since it can be later used to simplify the operation
construction methods by inferring their return types instead of requiring the
user to do so. The general infrastructure for binding interfaces is defined and
InferTypeOpInterface can be used as an example for binding other interfaces.

Reviewed By: gysit

Differential Revision: https://reviews.llvm.org/D111656

1 files changed, 14 insertions, 0 deletions

diff --git a/mlir/test/python/lib/PythonTestCAPI.cpp b/mlir/test/python/lib/PythonTestCAPI.cpp
new file mode 100644
index 000000000000..474476e74198
--- /dev/null
+++ b/mlir/test/python/lib/PythonTestCAPI.cpp
@@ -0,0 +1,14 @@
+//===- PythonTestCAPI.cpp - C API for the PythonTest dialect --------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#include "PythonTestCAPI.h"
+#include "PythonTestDialect.h"
+#include "mlir/CAPI/Registration.h"
+
+MLIR_DEFINE_CAPI_DIALECT_REGISTRATION(PythonTest, python_test,
+                                      python_test::PythonTestDialect)