Initial MLIR python bindings based on the C API.

* Basic support for context creation, module parsing and dumping.

Differential Revision: https://reviews.llvm.org/D85481

mlir/lib/Bindings/Python/IRModules.cpp

@@ -0,0 +1,36 @@
+//===- IRModules.cpp - IR Submodules of pybind module ---------------------===//
+//
+// 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 "IRModules.h"
+
+//------------------------------------------------------------------------------
+// Context Wrapper Class.
+//------------------------------------------------------------------------------
+
+PyMlirModule PyMlirContext::parse(const std::string &module) {
+  auto moduleRef = mlirModuleCreateParse(context, module.c_str());
+  return PyMlirModule(moduleRef);
+}
+
+//------------------------------------------------------------------------------
+// Module Wrapper Class.
+//------------------------------------------------------------------------------
+
+void PyMlirModule::dump() { mlirOperationDump(mlirModuleGetOperation(module)); }
+
+//------------------------------------------------------------------------------
+// Populates the pybind11 IR submodule.
+//------------------------------------------------------------------------------
+
+void populateIRSubmodule(py::module &m) {
+  py::class_<PyMlirContext>(m, "MlirContext")
+      .def(py::init<>())
+      .def("parse", &PyMlirContext::parse, py::keep_alive<0, 1>());
+
+  py::class_<PyMlirModule>(m, "MlirModule").def("dump", &PyMlirModule::dump);
+}