[mlir][memref][transform][python] Create .td file for bindings.

[ingomueller-net]

Summary

This patch creates the .td files for the Python bindings of the
transform ops of the MemRef dialect and integrates them into the build
systems (CMake and Bazel).

[ftynse]

Can we have a test with one simple op to make sure import actually works?

[ingomueller-net]

I am working an a patch with a mixin that will have a test. Would that be enough?

mlir/python/CMakeLists.txt

SOURCES
     dialects/_loop_transform_ops_ext.py
     dialects/transform/loop.py
   DIALECT_NAME transform
   EXTENSION_NAME loop_transform)
 
 declare_mlir_dialect_extension_python_bindings(
   ADD_TO_PARENT MLIRPythonSources.Dialects
   ROOT_DIR "${CMAKE_CURRENT_SOURCE_DIR}/mlir"
+  TD_FILE dialects/MemRefTransformOps.td
+  SOURCES
+    dialects/transform/memref.py
+  DIALECT_NAME transform
+  EXTENSION_NAME memref_transform)
+
+declare_mlir_dialect_extension_python_bindings(
+  ADD_TO_PARENT MLIRPythonSources.Dialects
+  ROOT_DIR "${CMAKE_CURRENT_SOURCE_DIR}/mlir"
   TD_FILE dialects/LinalgStructuredTransformOps.td
   SOURCES
     dialects/_structured_transform_ops_ext.py
     dialects/transform/structured.py
   DIALECT_NAME transform
   EXTENSION_NAME structured_transform)
 
 declare_mlir_dialect_python_bindings(

mlir/python/mlir/dialects/MemRefTransformOps.td

+//===-- MemRefTransformOps.td - Memref transform ops -------*- tablegen -*-===//
+//
+// 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
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef PYTHON_BINDINGS_MEMREF_TRANSFORM_OPS
+#define PYTHON_BINDINGS_MEMREF_TRANSFORM_OPS
+
+include "mlir/Dialect/MemRef/TransformOps/MemRefTransformOps.td"
+
+#endif

mlir/python/mlir/dialects/transform/memref.py

+#  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
+
+from .._memref_transform_ops_gen import *

utils/bazel/llvm-project-overlay/mlir/python/BUILD.bazel

deps = [
         "//mlir:FunctionInterfacesTdFiles",
         "//mlir:OpBaseTdFiles",
         "//mlir:TransformDialectTdFiles",
         "//mlir:SCFTransformOpsTdFiles",
     ],
 )
 
 gentbl_filegroup(
+    name = "MemRefTransformOpsPyGen",
+    tbl_outs = [
+        (
+            [
+                "-gen-python-op-bindings",
+                "-bind-dialect=transform",
+                "-dialect-extension=memref_transform",
+            ],
+            "mlir/dialects/_memref_transform_ops_gen.py",
+        ),
+    ],
+    tblgen = "//mlir:mlir-tblgen",
+    td_file = "mlir/dialects/MemRefTransformOps.td",
+    deps = [
+        "//mlir:MemRefTransformOpsTdFiles",
+    ],
+)
+
+gentbl_filegroup(
     name = "PDLTransformOpsPyGen",
     tbl_outs = [
         (
             [
                 "-gen-python-op-bindings",
                 "-bind-dialect=transform",
                 "-dialect-extension=transform_pdl_extension",
             ],
srcs = [
         "mlir/dialects/_gpu_transform_ops_ext.py",
         "mlir/dialects/_loop_transform_ops_ext.py",
         "mlir/dialects/_structured_transform_ops_ext.py",
         "mlir/dialects/_transform_ops_ext.py",
         "mlir/dialects/_transform_pdl_extension_ops_ext.py",
         ":BufferizationTransformOpsPyGen",
         ":GPUTransformOpsPyGen",
         ":LoopTransformOpsPyGen",
+        ":MemRefTransformOpsPyGen",
         ":PDLTransformOpsPyGen",
         ":StructuredTransformOpsPyGen",
         ":TransformOpsPyGen",
     ],
 )
 
 filegroup(
     name = "TransformOpsPackagePyFiles",