mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-12-21 00:32:23 +00:00
ddcdcc8863
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130068 91177308-0d34-0410-b5e6-96231b3b80d8
425 lines
13 KiB
C++
425 lines
13 KiB
C++
//===-------------------- Graph.h - PBQP Graph ------------------*- C++ -*-===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// PBQP Graph class.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
|
|
#ifndef LLVM_CODEGEN_PBQP_GRAPH_H
|
|
#define LLVM_CODEGEN_PBQP_GRAPH_H
|
|
|
|
#include "Math.h"
|
|
|
|
#include <list>
|
|
#include <map>
|
|
|
|
namespace PBQP {
|
|
|
|
/// PBQP Graph class.
|
|
/// Instances of this class describe PBQP problems.
|
|
class Graph {
|
|
private:
|
|
|
|
// ----- TYPEDEFS -----
|
|
class NodeEntry;
|
|
class EdgeEntry;
|
|
|
|
typedef std::list<NodeEntry> NodeList;
|
|
typedef std::list<EdgeEntry> EdgeList;
|
|
|
|
public:
|
|
|
|
typedef NodeList::iterator NodeItr;
|
|
typedef NodeList::const_iterator ConstNodeItr;
|
|
|
|
typedef EdgeList::iterator EdgeItr;
|
|
typedef EdgeList::const_iterator ConstEdgeItr;
|
|
|
|
private:
|
|
|
|
typedef std::list<EdgeItr> AdjEdgeList;
|
|
|
|
public:
|
|
|
|
typedef AdjEdgeList::iterator AdjEdgeItr;
|
|
|
|
private:
|
|
|
|
class NodeEntry {
|
|
private:
|
|
Vector costs;
|
|
AdjEdgeList adjEdges;
|
|
unsigned degree;
|
|
void *data;
|
|
public:
|
|
NodeEntry(const Vector &costs) : costs(costs), degree(0) {}
|
|
Vector& getCosts() { return costs; }
|
|
const Vector& getCosts() const { return costs; }
|
|
unsigned getDegree() const { return degree; }
|
|
AdjEdgeItr edgesBegin() { return adjEdges.begin(); }
|
|
AdjEdgeItr edgesEnd() { return adjEdges.end(); }
|
|
AdjEdgeItr addEdge(EdgeItr e) {
|
|
++degree;
|
|
return adjEdges.insert(adjEdges.end(), e);
|
|
}
|
|
void removeEdge(AdjEdgeItr ae) {
|
|
--degree;
|
|
adjEdges.erase(ae);
|
|
}
|
|
void setData(void *data) { this->data = data; }
|
|
void* getData() { return data; }
|
|
};
|
|
|
|
class EdgeEntry {
|
|
private:
|
|
NodeItr node1, node2;
|
|
Matrix costs;
|
|
AdjEdgeItr node1AEItr, node2AEItr;
|
|
void *data;
|
|
public:
|
|
EdgeEntry(NodeItr node1, NodeItr node2, const Matrix &costs)
|
|
: node1(node1), node2(node2), costs(costs) {}
|
|
NodeItr getNode1() const { return node1; }
|
|
NodeItr getNode2() const { return node2; }
|
|
Matrix& getCosts() { return costs; }
|
|
const Matrix& getCosts() const { return costs; }
|
|
void setNode1AEItr(AdjEdgeItr ae) { node1AEItr = ae; }
|
|
AdjEdgeItr getNode1AEItr() { return node1AEItr; }
|
|
void setNode2AEItr(AdjEdgeItr ae) { node2AEItr = ae; }
|
|
AdjEdgeItr getNode2AEItr() { return node2AEItr; }
|
|
void setData(void *data) { this->data = data; }
|
|
void *getData() { return data; }
|
|
};
|
|
|
|
// ----- MEMBERS -----
|
|
|
|
NodeList nodes;
|
|
unsigned numNodes;
|
|
|
|
EdgeList edges;
|
|
unsigned numEdges;
|
|
|
|
// ----- INTERNAL METHODS -----
|
|
|
|
NodeEntry& getNode(NodeItr nItr) { return *nItr; }
|
|
const NodeEntry& getNode(ConstNodeItr nItr) const { return *nItr; }
|
|
|
|
EdgeEntry& getEdge(EdgeItr eItr) { return *eItr; }
|
|
const EdgeEntry& getEdge(ConstEdgeItr eItr) const { return *eItr; }
|
|
|
|
NodeItr addConstructedNode(const NodeEntry &n) {
|
|
++numNodes;
|
|
return nodes.insert(nodes.end(), n);
|
|
}
|
|
|
|
EdgeItr addConstructedEdge(const EdgeEntry &e) {
|
|
assert(findEdge(e.getNode1(), e.getNode2()) == edges.end() &&
|
|
"Attempt to add duplicate edge.");
|
|
++numEdges;
|
|
EdgeItr edgeItr = edges.insert(edges.end(), e);
|
|
EdgeEntry &ne = getEdge(edgeItr);
|
|
NodeEntry &n1 = getNode(ne.getNode1());
|
|
NodeEntry &n2 = getNode(ne.getNode2());
|
|
// Sanity check on matrix dimensions:
|
|
assert((n1.getCosts().getLength() == ne.getCosts().getRows()) &&
|
|
(n2.getCosts().getLength() == ne.getCosts().getCols()) &&
|
|
"Edge cost dimensions do not match node costs dimensions.");
|
|
ne.setNode1AEItr(n1.addEdge(edgeItr));
|
|
ne.setNode2AEItr(n2.addEdge(edgeItr));
|
|
return edgeItr;
|
|
}
|
|
|
|
inline void copyFrom(const Graph &other);
|
|
public:
|
|
|
|
/// \brief Construct an empty PBQP graph.
|
|
Graph() : numNodes(0), numEdges(0) {}
|
|
|
|
/// \brief Copy construct this graph from "other". Note: Does not copy node
|
|
/// and edge data, only graph structure and costs.
|
|
/// @param other Source graph to copy from.
|
|
Graph(const Graph &other) : numNodes(0), numEdges(0) {
|
|
copyFrom(other);
|
|
}
|
|
|
|
/// \brief Make this graph a copy of "other". Note: Does not copy node and
|
|
/// edge data, only graph structure and costs.
|
|
/// @param other The graph to copy from.
|
|
/// @return A reference to this graph.
|
|
///
|
|
/// This will clear the current graph, erasing any nodes and edges added,
|
|
/// before copying from other.
|
|
Graph& operator=(const Graph &other) {
|
|
clear();
|
|
copyFrom(other);
|
|
return *this;
|
|
}
|
|
|
|
/// \brief Add a node with the given costs.
|
|
/// @param costs Cost vector for the new node.
|
|
/// @return Node iterator for the added node.
|
|
NodeItr addNode(const Vector &costs) {
|
|
return addConstructedNode(NodeEntry(costs));
|
|
}
|
|
|
|
/// \brief Add an edge between the given nodes with the given costs.
|
|
/// @param n1Itr First node.
|
|
/// @param n2Itr Second node.
|
|
/// @return Edge iterator for the added edge.
|
|
EdgeItr addEdge(Graph::NodeItr n1Itr, Graph::NodeItr n2Itr,
|
|
const Matrix &costs) {
|
|
assert(getNodeCosts(n1Itr).getLength() == costs.getRows() &&
|
|
getNodeCosts(n2Itr).getLength() == costs.getCols() &&
|
|
"Matrix dimensions mismatch.");
|
|
return addConstructedEdge(EdgeEntry(n1Itr, n2Itr, costs));
|
|
}
|
|
|
|
/// \brief Get the number of nodes in the graph.
|
|
/// @return Number of nodes in the graph.
|
|
unsigned getNumNodes() const { return numNodes; }
|
|
|
|
/// \brief Get the number of edges in the graph.
|
|
/// @return Number of edges in the graph.
|
|
unsigned getNumEdges() const { return numEdges; }
|
|
|
|
/// \brief Get a node's cost vector.
|
|
/// @param nItr Node iterator.
|
|
/// @return Node cost vector.
|
|
Vector& getNodeCosts(NodeItr nItr) { return getNode(nItr).getCosts(); }
|
|
|
|
/// \brief Get a node's cost vector (const version).
|
|
/// @param nItr Node iterator.
|
|
/// @return Node cost vector.
|
|
const Vector& getNodeCosts(ConstNodeItr nItr) const {
|
|
return getNode(nItr).getCosts();
|
|
}
|
|
|
|
/// \brief Set a node's data pointer.
|
|
/// @param nItr Node iterator.
|
|
/// @param data Pointer to node data.
|
|
///
|
|
/// Typically used by a PBQP solver to attach data to aid in solution.
|
|
void setNodeData(NodeItr nItr, void *data) { getNode(nItr).setData(data); }
|
|
|
|
/// \brief Get the node's data pointer.
|
|
/// @param nItr Node iterator.
|
|
/// @return Pointer to node data.
|
|
void* getNodeData(NodeItr nItr) { return getNode(nItr).getData(); }
|
|
|
|
/// \brief Get an edge's cost matrix.
|
|
/// @param eItr Edge iterator.
|
|
/// @return Edge cost matrix.
|
|
Matrix& getEdgeCosts(EdgeItr eItr) { return getEdge(eItr).getCosts(); }
|
|
|
|
/// \brief Get an edge's cost matrix (const version).
|
|
/// @param eItr Edge iterator.
|
|
/// @return Edge cost matrix.
|
|
const Matrix& getEdgeCosts(ConstEdgeItr eItr) const {
|
|
return getEdge(eItr).getCosts();
|
|
}
|
|
|
|
/// \brief Set an edge's data pointer.
|
|
/// @param eItr Edge iterator.
|
|
/// @param data Pointer to edge data.
|
|
///
|
|
/// Typically used by a PBQP solver to attach data to aid in solution.
|
|
void setEdgeData(EdgeItr eItr, void *data) { getEdge(eItr).setData(data); }
|
|
|
|
/// \brief Get an edge's data pointer.
|
|
/// @param eItr Edge iterator.
|
|
/// @return Pointer to edge data.
|
|
void* getEdgeData(EdgeItr eItr) { return getEdge(eItr).getData(); }
|
|
|
|
/// \brief Get a node's degree.
|
|
/// @param nItr Node iterator.
|
|
/// @return The degree of the node.
|
|
unsigned getNodeDegree(NodeItr nItr) const {
|
|
return getNode(nItr).getDegree();
|
|
}
|
|
|
|
/// \brief Begin iterator for node set.
|
|
NodeItr nodesBegin() { return nodes.begin(); }
|
|
|
|
/// \brief Begin const iterator for node set.
|
|
ConstNodeItr nodesBegin() const { return nodes.begin(); }
|
|
|
|
/// \brief End iterator for node set.
|
|
NodeItr nodesEnd() { return nodes.end(); }
|
|
|
|
/// \brief End const iterator for node set.
|
|
ConstNodeItr nodesEnd() const { return nodes.end(); }
|
|
|
|
/// \brief Begin iterator for edge set.
|
|
EdgeItr edgesBegin() { return edges.begin(); }
|
|
|
|
/// \brief End iterator for edge set.
|
|
EdgeItr edgesEnd() { return edges.end(); }
|
|
|
|
/// \brief Get begin iterator for adjacent edge set.
|
|
/// @param nItr Node iterator.
|
|
/// @return Begin iterator for the set of edges connected to the given node.
|
|
AdjEdgeItr adjEdgesBegin(NodeItr nItr) {
|
|
return getNode(nItr).edgesBegin();
|
|
}
|
|
|
|
/// \brief Get end iterator for adjacent edge set.
|
|
/// @param nItr Node iterator.
|
|
/// @return End iterator for the set of edges connected to the given node.
|
|
AdjEdgeItr adjEdgesEnd(NodeItr nItr) {
|
|
return getNode(nItr).edgesEnd();
|
|
}
|
|
|
|
/// \brief Get the first node connected to this edge.
|
|
/// @param eItr Edge iterator.
|
|
/// @return The first node connected to the given edge.
|
|
NodeItr getEdgeNode1(EdgeItr eItr) {
|
|
return getEdge(eItr).getNode1();
|
|
}
|
|
|
|
/// \brief Get the second node connected to this edge.
|
|
/// @param eItr Edge iterator.
|
|
/// @return The second node connected to the given edge.
|
|
NodeItr getEdgeNode2(EdgeItr eItr) {
|
|
return getEdge(eItr).getNode2();
|
|
}
|
|
|
|
/// \brief Get the "other" node connected to this edge.
|
|
/// @param eItr Edge iterator.
|
|
/// @param nItr Node iterator for the "given" node.
|
|
/// @return The iterator for the "other" node connected to this edge.
|
|
NodeItr getEdgeOtherNode(EdgeItr eItr, NodeItr nItr) {
|
|
EdgeEntry &e = getEdge(eItr);
|
|
if (e.getNode1() == nItr) {
|
|
return e.getNode2();
|
|
} // else
|
|
return e.getNode1();
|
|
}
|
|
|
|
/// \brief Get the edge connecting two nodes.
|
|
/// @param n1Itr First node iterator.
|
|
/// @param n2Itr Second node iterator.
|
|
/// @return An iterator for edge (n1Itr, n2Itr) if such an edge exists,
|
|
/// otherwise returns edgesEnd().
|
|
EdgeItr findEdge(NodeItr n1Itr, NodeItr n2Itr) {
|
|
for (AdjEdgeItr aeItr = adjEdgesBegin(n1Itr), aeEnd = adjEdgesEnd(n1Itr);
|
|
aeItr != aeEnd; ++aeItr) {
|
|
if ((getEdgeNode1(*aeItr) == n2Itr) ||
|
|
(getEdgeNode2(*aeItr) == n2Itr)) {
|
|
return *aeItr;
|
|
}
|
|
}
|
|
return edges.end();
|
|
}
|
|
|
|
/// \brief Remove a node from the graph.
|
|
/// @param nItr Node iterator.
|
|
void removeNode(NodeItr nItr) {
|
|
NodeEntry &n = getNode(nItr);
|
|
for (AdjEdgeItr itr = n.edgesBegin(), end = n.edgesEnd(); itr != end;) {
|
|
EdgeItr eItr = *itr;
|
|
++itr;
|
|
removeEdge(eItr);
|
|
}
|
|
nodes.erase(nItr);
|
|
--numNodes;
|
|
}
|
|
|
|
/// \brief Remove an edge from the graph.
|
|
/// @param eItr Edge iterator.
|
|
void removeEdge(EdgeItr eItr) {
|
|
EdgeEntry &e = getEdge(eItr);
|
|
NodeEntry &n1 = getNode(e.getNode1());
|
|
NodeEntry &n2 = getNode(e.getNode2());
|
|
n1.removeEdge(e.getNode1AEItr());
|
|
n2.removeEdge(e.getNode2AEItr());
|
|
edges.erase(eItr);
|
|
--numEdges;
|
|
}
|
|
|
|
/// \brief Remove all nodes and edges from the graph.
|
|
void clear() {
|
|
nodes.clear();
|
|
edges.clear();
|
|
numNodes = numEdges = 0;
|
|
}
|
|
|
|
/// \brief Print a representation of this graph in DOT format.
|
|
/// @param os Output stream to print on.
|
|
template <typename OStream>
|
|
void printDot(OStream &os) {
|
|
|
|
os << "graph {\n";
|
|
|
|
for (NodeItr nodeItr = nodesBegin(), nodeEnd = nodesEnd();
|
|
nodeItr != nodeEnd; ++nodeItr) {
|
|
|
|
os << " node" << nodeItr << " [ label=\""
|
|
<< nodeItr << ": " << getNodeCosts(nodeItr) << "\" ]\n";
|
|
}
|
|
|
|
os << " edge [ len=" << getNumNodes() << " ]\n";
|
|
|
|
for (EdgeItr edgeItr = edgesBegin(), edgeEnd = edgesEnd();
|
|
edgeItr != edgeEnd; ++edgeItr) {
|
|
|
|
os << " node" << getEdgeNode1(edgeItr)
|
|
<< " -- node" << getEdgeNode2(edgeItr)
|
|
<< " [ label=\"";
|
|
|
|
const Matrix &edgeCosts = getEdgeCosts(edgeItr);
|
|
|
|
for (unsigned i = 0; i < edgeCosts.getRows(); ++i) {
|
|
os << edgeCosts.getRowAsVector(i) << "\\n";
|
|
}
|
|
os << "\" ]\n";
|
|
}
|
|
os << "}\n";
|
|
}
|
|
|
|
};
|
|
|
|
class NodeItrComparator {
|
|
public:
|
|
bool operator()(Graph::NodeItr n1, Graph::NodeItr n2) const {
|
|
return &*n1 < &*n2;
|
|
}
|
|
|
|
bool operator()(Graph::ConstNodeItr n1, Graph::ConstNodeItr n2) const {
|
|
return &*n1 < &*n2;
|
|
}
|
|
};
|
|
|
|
class EdgeItrCompartor {
|
|
public:
|
|
bool operator()(Graph::EdgeItr e1, Graph::EdgeItr e2) const {
|
|
return &*e1 < &*e2;
|
|
}
|
|
|
|
bool operator()(Graph::ConstEdgeItr e1, Graph::ConstEdgeItr e2) const {
|
|
return &*e1 < &*e2;
|
|
}
|
|
};
|
|
|
|
void Graph::copyFrom(const Graph &other) {
|
|
std::map<Graph::ConstNodeItr, Graph::NodeItr,
|
|
NodeItrComparator> nodeMap;
|
|
|
|
for (Graph::ConstNodeItr nItr = other.nodesBegin(),
|
|
nEnd = other.nodesEnd();
|
|
nItr != nEnd; ++nItr) {
|
|
nodeMap[nItr] = addNode(other.getNodeCosts(nItr));
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
#endif // LLVM_CODEGEN_PBQP_GRAPH_HPP
|