1 //===- DataflowLattice.h ----------------------------------------*- 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 // This file defines base types for building lattices to be used in dataflow 10 // analyses that run over Control-Flow Graphs (CFGs). 11 // 12 //===----------------------------------------------------------------------===// 13 14 #ifndef LLVM_CLANG_ANALYSIS_FLOWSENSITIVE_DATAFLOWLATTICE_H 15 #define LLVM_CLANG_ANALYSIS_FLOWSENSITIVE_DATAFLOWLATTICE_H 16 17 namespace clang { 18 namespace dataflow { 19 20 /// Effect indicating whether a lattice join operation resulted in a new value. 21 // FIXME: Rename to `LatticeEffect` since `widen` uses it as well, and we are 22 // likely removing it from `join`. 23 enum class LatticeJoinEffect { 24 Unchanged, 25 Changed, 26 }; 27 28 } // namespace dataflow 29 } // namespace clang 30 31 #endif // LLVM_CLANG_ANALYSIS_FLOWSENSITIVE_DATAFLOWLATTICE_H 32