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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@194314 91177308-0d34-0410-b5e6-96231b3b80d8
93 lines
3.0 KiB
C++
93 lines
3.0 KiB
C++
//===-- Solution.h ------- PBQP Solution ------------------------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// PBQP Solution class.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_CODEGEN_PBQP_SOLUTION_H
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#define LLVM_CODEGEN_PBQP_SOLUTION_H
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#include "Graph.h"
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#include "Math.h"
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#include <map>
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namespace PBQP {
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/// \brief Represents a solution to a PBQP problem.
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///
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/// To get the selection for each node in the problem use the getSelection method.
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class Solution {
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private:
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typedef std::map<Graph::NodeId, unsigned> SelectionsMap;
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SelectionsMap selections;
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unsigned r0Reductions, r1Reductions, r2Reductions, rNReductions;
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public:
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/// \brief Initialise an empty solution.
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Solution()
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: r0Reductions(0), r1Reductions(0), r2Reductions(0), rNReductions(0) {}
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/// \brief Number of nodes for which selections have been made.
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/// @return Number of nodes for which selections have been made.
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unsigned numNodes() const { return selections.size(); }
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/// \brief Records a reduction via the R0 rule. Should be called from the
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/// solver only.
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void recordR0() { ++r0Reductions; }
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/// \brief Returns the number of R0 reductions applied to solve the problem.
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unsigned numR0Reductions() const { return r0Reductions; }
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/// \brief Records a reduction via the R1 rule. Should be called from the
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/// solver only.
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void recordR1() { ++r1Reductions; }
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/// \brief Returns the number of R1 reductions applied to solve the problem.
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unsigned numR1Reductions() const { return r1Reductions; }
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/// \brief Records a reduction via the R2 rule. Should be called from the
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/// solver only.
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void recordR2() { ++r2Reductions; }
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/// \brief Returns the number of R2 reductions applied to solve the problem.
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unsigned numR2Reductions() const { return r2Reductions; }
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/// \brief Records a reduction via the RN rule. Should be called from the
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/// solver only.
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void recordRN() { ++ rNReductions; }
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/// \brief Returns the number of RN reductions applied to solve the problem.
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unsigned numRNReductions() const { return rNReductions; }
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/// \brief Set the selection for a given node.
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/// @param nodeId Node id.
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/// @param selection Selection for nodeId.
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void setSelection(Graph::NodeId nodeId, unsigned selection) {
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selections[nodeId] = selection;
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}
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/// \brief Get a node's selection.
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/// @param nodeId Node id.
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/// @return The selection for nodeId;
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unsigned getSelection(Graph::NodeId nodeId) const {
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SelectionsMap::const_iterator sItr = selections.find(nodeId);
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assert(sItr != selections.end() && "No selection for node.");
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return sItr->second;
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}
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};
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}
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#endif // LLVM_CODEGEN_PBQP_SOLUTION_H
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