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_TRIANGULAR_SOLVE_EXPANDER_H_
17 #define TENSORFLOW_COMPILER_XLA_SERVICE_TRIANGULAR_SOLVE_EXPANDER_H_
18 
19 #include "absl/container/flat_hash_map.h"
20 #include "tensorflow/compiler/xla/service/op_expander_pass.h"
21 
22 namespace xla {
23 
24 class TriangularSolveExpander : public OpExpanderPass {
25  public:
name()26   absl::string_view name() const override {
27     return "triangular_solve_expander";
28   }
29 
30  protected:
31   bool InstructionMatchesPattern(HloInstruction* instruction) override;
32 
33   StatusOr<HloInstruction*> ExpandInstruction(
34       HloInstruction* instruction) override;
35 
36  private:
37   // Mapping from op signatures to existing computations.
38   absl::flat_hash_map<string, HloComputation*> computation_cache_;
39 };
40 
41 }  // namespace xla
42 
43 #endif  // TENSORFLOW_COMPILER_XLA_SERVICE_TRIANGULAR_SOLVE_EXPANDER_H_
44