1 | /* |
2 | * Licensed to the Apache Software Foundation (ASF) under one |
3 | * or more contributor license agreements. See the NOTICE file |
4 | * distributed with this work for additional information |
5 | * regarding copyright ownership. The ASF licenses this file |
6 | * to you under the Apache License, Version 2.0 (the |
7 | * "License"); you may not use this file except in compliance |
8 | * with the License. You may obtain a copy of the License at |
9 | * |
10 | * http://www.apache.org/licenses/LICENSE-2.0 |
11 | * |
12 | * Unless required by applicable law or agreed to in writing, |
13 | * software distributed under the License is distributed on an |
14 | * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
15 | * KIND, either express or implied. See the License for the |
16 | * specific language governing permissions and limitations |
17 | * under the License. |
18 | */ |
19 | |
20 | /*! |
21 | * \file fold_constant.h |
22 | * \brief Utility functions for folding constants in expressions. |
23 | */ |
24 | #ifndef TVM_RELAY_TRANSFORMS_FOLD_CONSTANT_H_ |
25 | #define TVM_RELAY_TRANSFORMS_FOLD_CONSTANT_H_ |
26 | |
27 | #include <tvm/relay/expr.h> |
28 | |
29 | namespace tvm { |
30 | namespace relay { |
31 | namespace transform { |
32 | |
33 | /*! |
34 | * \brief Apply constant folding on an expression. |
35 | * |
36 | * \param expr The expression to fold. |
37 | * \param fold_qnn Whether to fold constants for QNN operations. |
38 | * \returns The new folded expression. |
39 | */ |
40 | Expr FoldConstantExpr(const Expr& expr, bool fold_qnn = true); |
41 | |
42 | /*! |
43 | * \brief Returns \p expr with any constants expressions evaluated and let-bound constants |
44 | * inlined. Returns \p expr unchanged if no change. |
45 | * |
46 | * CAUTION: The importers rely on this function returning \p expr unchanged to preserve sharing |
47 | * from their p.o.v. Furthermore, this function can be called before conversion to ANF so |
48 | * we must avoid all recursion. |
49 | */ |
50 | Expr FoldConstantExpr(const Expr& expr, const IRModule& mod, bool fold_qnn); |
51 | |
52 | } // namespace transform |
53 | } // namespace relay |
54 | } // namespace tvm |
55 | #endif // TVM_RELAY_TRANSFORMS_FOLD_CONSTANT_H_ |
56 | |