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-//===-- InterferenceGraph.h - Interference graph for register coloring -*- C++ -*-===//
-//
-// The LLVM Compiler Infrastructure
-//
-// This file was developed by the LLVM research group and is distributed under
-// the University of Illinois Open Source License. See LICENSE.TXT for details.
-//
-//===----------------------------------------------------------------------===//
-
-/* Title: InterferenceGraph.h -*- C++ -*-
- Author: Ruchira Sasanka
- Date: July 20, 01
- Purpose: Interference Graph used for register coloring.
-
- Notes:
- Adj Info is stored in the lower trangular matrix (i.e., row > col )
-
- This class must be used in the following way:
-
- * Construct class
- * call addLRToIG as many times to add ALL LRs to this IG
- * call createGraph to create the actual matrix
- * Then setInterference, getInterference, mergeIGNodesOfLRs can be
- called as desired to modify the graph.
- * Once the modifications to the graph are over, call
- setCurDegreeOfIGNodes() before pushing IGNodes on to stack for coloring.
-*/
-
-#ifndef INTERFERENCEGRAPH_H
-#define INTERFERENCEGRAPH_H
-
-#include <vector>
-class LiveRange;
-class RegClass;
-class IGNode;
-
-class InterferenceGraph {
- char **IG; // a poiner to the interference graph
- unsigned int Size; // size of a side of the IG
- RegClass *const RegCl; // RegCl contains this IG
- std::vector<IGNode *> IGNodeList; // a list of all IGNodes in a reg class
-
- public:
- // the matrix is not yet created by the constructor. Call createGraph()
- // to create it after adding all IGNodes to the IGNodeList
- InterferenceGraph(RegClass *RC);
- ~InterferenceGraph();
-
- void createGraph();
-
- void addLRToIG(LiveRange *LR);
-
- void setInterference(const LiveRange *LR1,
- const LiveRange *LR2);
-
- unsigned getInterference(const LiveRange *LR1,
- const LiveRange *LR2) const ;
-
- void mergeIGNodesOfLRs(const LiveRange *LR1, LiveRange *LR2);
-
- std::vector<IGNode *> &getIGNodeList() { return IGNodeList; }
- const std::vector<IGNode *> &getIGNodeList() const { return IGNodeList; }
-
- void setCurDegreeOfIGNodes();
-
- void printIG() const;
- void printIGNodeList() const;
-};
-
-#endif