1 | //===- Solution.h - PBQP Solution -------------------------------*- 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 | // PBQP Solution class. |
10 | // |
11 | //===----------------------------------------------------------------------===// |
12 | |
13 | #ifndef LLVM_CODEGEN_PBQP_SOLUTION_H |
14 | #define LLVM_CODEGEN_PBQP_SOLUTION_H |
15 | |
16 | #include "llvm/CodeGen/PBQP/Graph.h" |
17 | #include <cassert> |
18 | #include <map> |
19 | |
20 | namespace llvm { |
21 | namespace PBQP { |
22 | |
23 | /// Represents a solution to a PBQP problem. |
24 | /// |
25 | /// To get the selection for each node in the problem use the getSelection method. |
26 | class Solution { |
27 | private: |
28 | using SelectionsMap = std::map<GraphBase::NodeId, unsigned>; |
29 | SelectionsMap selections; |
30 | |
31 | public: |
32 | /// Initialise an empty solution. |
33 | Solution() = default; |
34 | |
35 | /// Set the selection for a given node. |
36 | /// @param nodeId Node id. |
37 | /// @param selection Selection for nodeId. |
38 | void setSelection(GraphBase::NodeId nodeId, unsigned selection) { |
39 | selections[nodeId] = selection; |
40 | } |
41 | |
42 | /// Get a node's selection. |
43 | /// @param nodeId Node id. |
44 | /// @return The selection for nodeId; |
45 | unsigned getSelection(GraphBase::NodeId nodeId) const { |
46 | SelectionsMap::const_iterator sItr = selections.find(x: nodeId); |
47 | assert(sItr != selections.end() && "No selection for node." ); |
48 | return sItr->second; |
49 | } |
50 | }; |
51 | |
52 | } // end namespace PBQP |
53 | } // end namespace llvm |
54 | |
55 | #endif // LLVM_CODEGEN_PBQP_SOLUTION_H |
56 | |