[mlir:python] Port Python bindings of IRDL to bazel build.

This PR sets up build rules for the Python bindings of the IRDL dialect
introduced by llvm#158488. The absence of them does not break the bazel
build but some downstream users rely on them.

Signed-off-by: Ingo Müller <[email protected]>

Author: ingomueller-net

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

@@ -1211,6 +1211,20 @@ cc_binary(
     ],
 )
 
+cc_binary(
+    name = "_mlirDialectsIRDL.so",
+    srcs = ["lib/Bindings/Python/DialectIRDL.cpp"],
+    copts = PYBIND11_COPTS,
+    features = PYBIND11_FEATURES,
+    linkshared = 1,
+    linkstatic = 0,
+    deps = [
+        ":CAPIIR",
+        ":MLIRBindingsPythonNanobindHeadersAndDeps",
+        "@nanobind",
+    ],
+)
+
 cc_binary(
     name = "_mlirDialectsLinalg.so",
     srcs = ["lib/Bindings/Python/DialectLinalg.cpp"],

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

@@ -537,6 +537,38 @@ filegroup(
     ],
 )
 
+##---------------------------------------------------------------------------##
+# IRDL dialect.
+##---------------------------------------------------------------------------##
+
+gentbl_filegroup(
+    name = "IRDLOpsPyGen",
+    tbl_outs = {
+        "mlir/dialects/_irdl_enum_gen.py": [
+            "-gen-python-enum-bindings",
+            "-bind-dialect=irdl",
+        ],
+        "mlir/dialects/_irdl_ops_gen.py": [
+            "-gen-python-op-bindings",
+            "-bind-dialect=irdl",
+        ],
+    },
+    tblgen = "//mlir:mlir-tblgen",
+    td_file = "mlir/dialects/IRDLOps.td",
+    deps = [
+        "//mlir:IRDLTdFiles",
+        "//mlir:OpBaseTdFiles",
+    ],
+)
+
+filegroup(
+    name = "IRDLPyFiles",
+    srcs = [
+        "mlir/dialects/irdl.py",
+        ":IRDLOpsPyGen",
+    ],
+)
+
 ##---------------------------------------------------------------------------##
 # Math dialect.
 ##---------------------------------------------------------------------------##