LLVM  10.0.0svn
Solution.h
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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 
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(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
Represents a solution to a PBQP problem.
Definition: Solution.h:26
This class represents lattice values for constants.
Definition: AllocatorList.h:23
Solution()=default
Initialise an empty solution.
void setSelection(GraphBase::NodeId nodeId, unsigned selection)
Set the selection for a given node.
Definition: Solution.h:38
unsigned getSelection(GraphBase::NodeId nodeId) const
Get a node&#39;s selection.
Definition: Solution.h:45
assert(ImpDefSCC.getReg()==AMDGPU::SCC &&ImpDefSCC.isDef())