1 //===- SideEffectUtils.h - Side Effect Utils --------------------*- C++ -*-===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 
9 #ifndef MLIR_TRANSFORMS_SIDEFFECTUTILS_H
10 #define MLIR_TRANSFORMS_SIDEFFECTUTILS_H
11 
12 namespace mlir {
13 
14 class Operation;
15 
16 /// Returns true if the given operation is side-effect free.
17 ///
18 /// An operation is side-effect free if its implementation of
19 /// `MemoryEffectOpInterface` indicates that it has no memory effects. For
20 /// example, it may implement `NoSideEffect` in ODS. Alternatively, if the
21 /// operation `HasRecursiveSideEffects`, then it is side-effect free if all of
22 /// its nested operations are side-effect free.
23 ///
24 /// If the operation has both, then it is side-effect free if both conditions
25 /// are satisfied.
26 bool isSideEffectFree(Operation *op);
27 
28 } // end namespace mlir
29 
30 #endif // MLIR_TRANSFORMS_SIDEFFECTUTILS_H
31