[Mlir-commits] [mlir] [Mesh] initialize mesh dialect (PR #68007)

[Chengji Yao]

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@@ -0,0 +1,91 @@
+//===- MeshBase.td - Mesh Dialect --------------------------*- 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 MLIR_DIALECT_MESH_IR_MESHBASE_TD
+#define MLIR_DIALECT_MESH_IR_MESHBASE_TD
+
+include "mlir/IR/OpBase.td"
+include "mlir/IR/AttrTypeBase.td"
+include "mlir/IR/BuiltinTypeInterfaces.td"
+
+//===----------------------------------------------------------------------===//
+// Mesh Dialect
+//===----------------------------------------------------------------------===//
+
+def Mesh_Dialect : Dialect {
+  let name = "mesh";
+  let cppNamespace = "::mlir::mesh";
+
+  let description = [{
+    The `mesh` dialect contains a set of attributes, operations, interfaces that
+    are useful for representing sharding and communication on device mesh
+    cluster.
+  }];
+
+  let dependentDialects = [
+    "arith::ArithDialect"
+  ];
+
+  let useDefaultAttributePrinterParser = 1;
+  let hasConstantMaterializer = 1;
+}
+
+//===----------------------------------------------------------------------===//
+// Mesh Attribute
+//===----------------------------------------------------------------------===//
+
+def MeshSharding : AttrDef<Mesh_Dialect, "MeshSharding"> {
+  let mnemonic = "shard";
+
+  let parameters = (ins
+    OptionalParameter<"::mlir::SymbolRefAttr">:$cluster,
----------------
yaochengji wrote:

I'm thinking about the default `cluster` symbol ref could be fetched from func op's attributes to simplify the IR text. The downside is that some complexity will be introduced in the implementation of related passes.

I'd like to hear your preference regarding whether the cluster should be optional or not.

https://github.com/llvm/llvm-project/pull/68007