f8655c08cf
Derive HloModulePass and HloModuleGroupPass from HloPassInterface which run module-scoped and module-group-scoped respectively. Replace all existing uses of HloPassInterface with HloModulePass because all existing passes are module-scoped. Also rewrite HloPassPipeline to support both module-scoped and module-group-scoped passes. PiperOrigin-RevId: 213629604
51 lines
2.0 KiB
C++
51 lines
2.0 KiB
C++
/* Copyright 2017 The TensorFlow Authors. All Rights Reserved.
|
|
|
|
Licensed under the Apache License, Version 2.0 (the "License");
|
|
you may not use this file except in compliance with the License.
|
|
You may obtain a copy of the License at
|
|
|
|
http://www.apache.org/licenses/LICENSE-2.0
|
|
|
|
Unless required by applicable law or agreed to in writing, software
|
|
distributed under the License is distributed on an "AS IS" BASIS,
|
|
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
See the License for the specific language governing permissions and
|
|
limitations under the License.
|
|
==============================================================================*/
|
|
|
|
#ifndef TENSORFLOW_COMPILER_XLA_SERVICE_HLO_CSE_H_
|
|
#define TENSORFLOW_COMPILER_XLA_SERVICE_HLO_CSE_H_
|
|
|
|
#include "tensorflow/compiler/xla/service/hlo_module.h"
|
|
#include "tensorflow/compiler/xla/service/hlo_pass_interface.h"
|
|
|
|
namespace xla {
|
|
|
|
// A pass which performs common-subexpression elimination. Identical constants
|
|
// and identical instructions with the same operands are commoned. The pass
|
|
// iterates over the instructions in topological order which enables the pass to
|
|
// find arbitrarily large common expressions.
|
|
class HloCSE : public HloModulePass {
|
|
public:
|
|
// If is_layout_sensitive is true, then the simplifier preserves layout during
|
|
// transformation. Otherwise, layout is ignored.
|
|
explicit HloCSE(bool is_layout_sensitive,
|
|
bool only_fusion_computations = false)
|
|
: is_layout_sensitive_(is_layout_sensitive),
|
|
only_fusion_computations_(only_fusion_computations) {}
|
|
~HloCSE() override = default;
|
|
absl::string_view name() const override { return "cse"; }
|
|
|
|
// Run CSE on the given module. Returns whether the module was changed (common
|
|
// subexpressions were found and eliminated).
|
|
StatusOr<bool> Run(HloModule* module) override;
|
|
|
|
private:
|
|
const bool is_layout_sensitive_;
|
|
const bool only_fusion_computations_;
|
|
};
|
|
|
|
} // namespace xla
|
|
|
|
#endif // TENSORFLOW_COMPILER_XLA_SERVICE_HLO_CSE_H_
|