[Mlir-commits] [mlir] [mlir] Initial patch to add an MPI dialect (PR #68892)

[Christian Ulmann]

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+//===- MPIBase.td - Base defs for mpi 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_MPI_IR_MPI_TD
+#define MLIR_DIALECT_MPI_IR_MPI_TD
+
+include "mlir/IR/AttrTypeBase.td"
+include "mlir/IR/OpBase.td"
+include "mlir/IR/EnumAttr.td"
+
+def MPI_Dialect : Dialect {
+  let name = "mpi";
+  let cppNamespace = "::mlir::mpi";
+  let description = [{
+    This dialect models the Message Passing Interface (MPI), version 4.0. It is
+    meant to serve as an interfacing dialect that is targeted by higher-level dialects.
+    The MPI dialect itself can be lowered to multiple MPI implementations and hide
+    differences in ABI. The dialect models the functions of the MPI specification as
+    close to 1:1 as possible while preserving SSA value semantics where it makes sense,
+    and uses `memref` types instead of bare pointers.
+
+    This dialect is under active development, and while stability is an
+    eventual goal, it is not guaranteed at this juncture. Given the early state,
+    it is recommended to inquire further prior to using this dialect.
+
+    For an in-depth documentation of the MPI library interface, please refer to official documentation
+    such as the [OpenMPI online documentation](https://www.open-mpi.org/doc/current/).
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Dinistro wrote:

Nit: Please ensure that this does not exceed the 80 character limit.

https://github.com/llvm/llvm-project/pull/68892