[MLIR] Add native Bytecode support for properties

This is adding a new interface (`BytecodeOpInterface`) to allow operations to
opt-in skipping conversion to attribute and serializing properties to native
bytecode.

The scheme relies on a new section where properties are stored in sequence

  { size, serialize_properties }, ...

The operations are storing the index of a properties, a table of offset is
built when loading the properties section the first time.

Back-deployment to version prior to 4 are relying on getAttrDictionnary() which
we intend to deprecate and remove: that is putting a de-factor end-of-support
horizon for supporting deployments to version older than 4.

Differential Revision: https://reviews.llvm.org/D151065

1 files changed, 17 insertions, 0 deletions

diff --git a/mlir/lib/Bytecode/BytecodeOpInterface.cpp b/mlir/lib/Bytecode/BytecodeOpInterface.cpp
new file mode 100644
index 000000000000..e767f57b9bb4
--- /dev/null
+++ b/mlir/lib/Bytecode/BytecodeOpInterface.cpp
@@ -0,0 +1,17 @@
+//===- BytecodeOpInterface.cpp - Bytecode Op Interfaces -------------------===//
+//
+// 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 "mlir/Bytecode/BytecodeOpInterface.h"
+
+using namespace mlir;
+
+//===----------------------------------------------------------------------===//
+// BytecodeOpInterface
+//===----------------------------------------------------------------------===//
+
+#include "mlir/Bytecode/BytecodeOpInterface.cpp.inc"