1 /* Copyright 2018 The TensorFlow Authors. All Rights Reserved.
2 
3 Licensed under the Apache License, Version 2.0 (the "License");
4 you may not use this file except in compliance with the License.
5 You may obtain a copy of the License at
6 
7     http://www.apache.org/licenses/LICENSE-2.0
8 
9 Unless required by applicable law or agreed to in writing, software
10 distributed under the License is distributed on an "AS IS" BASIS,
11 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 See the License for the specific language governing permissions and
13 limitations under the License.
14 ==============================================================================*/
15 
16 #ifndef TENSORFLOW_COMPILER_XLA_SERVICE_BATCH_DOT_SIMPLIFICATION_H_
17 #define TENSORFLOW_COMPILER_XLA_SERVICE_BATCH_DOT_SIMPLIFICATION_H_
18 
19 #include "tensorflow/compiler/xla/service/hlo_module.h"
20 #include "tensorflow/compiler/xla/service/hlo_pass_interface.h"
21 
22 namespace xla {
23 // Simplifies batch dot operations.
24 //
25 // Normally these would live in the algebraic simplifier, but we want to run
26 // this to fixpoint (this pass reaches fixed point in one execution) before we
27 // run the DotDecomposer.
28 class BatchDotSimplification : public HloModulePass {
29  public:
30   StatusOr<bool> Run(HloModule* module) override;
31   absl::string_view name() const override;
32 
33  private:
34   StatusOr<bool> ElideDegenerateBatchDimensionFromBatchDot(
35       HloInstruction* batch_dot);
36 };
37 }  // namespace xla
38 
39 #endif  // TENSORFLOW_COMPILER_XLA_SERVICE_BATCH_DOT_SIMPLIFICATION_H_
40