+++ /dev/null
-/* 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 INTERFERENCE_GRAPH_H
-#define INTERFERENCE_GRAPH_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
+++ /dev/null
-/* Title: RegClass.h -*- C++ -*-
- Author: Ruchira Sasanka
- Date: Aug 20, 01
- Purpose: Contains machine independent methods for register coloring.
-
-*/
-
-#ifndef REG_CLASS_H
-#define REG_CLASS_H
-
-#include "llvm/CodeGen/InterferenceGraph.h"
-#include "llvm/Target/TargetRegInfo.h"
-#include <stack>
-class TargetRegClassInfo;
-
-typedef std::vector<unsigned> ReservedColorListType;
-
-
-//-----------------------------------------------------------------------------
-// Class RegClass
-//
-// Implements a machine independant register class.
-//
-// This is the class that contains all data structures and common algos
-// for coloring a particular register class (e.g., int class, fp class).
-// This class is hardware independent. This class accepts a hardware
-// dependent description of machine registers (TargetRegInfo class) to
-// get hardware specific info and to color an individual IG node.
-//
-// This class contains the InterferenceGraph (IG).
-// Also it contains an IGNode stack that can be used for coloring.
-// The class provides some easy access methods to the IG methods, since these
-// methods are called thru a register class.
-//
-//-----------------------------------------------------------------------------
-class RegClass {
- const Function *const Meth; // Function we are working on
- const TargetRegClassInfo *const MRC; // corresponding MRC
- const unsigned RegClassID; // my int ID
-
- InterferenceGraph IG; // Interference graph - constructed by
- // buildInterferenceGraph
- std::stack<IGNode *> IGNodeStack; // the stack used for coloring
-
- // ReservedColorList - for passing registers that are pre-allocated and cannot
- // be used by the register allocator for this function.
- //
- const ReservedColorListType *const ReservedColorList;
-
- // IsColorUsedArr - An array used for coloring each node. This array must be
- // of size MRC->getNumOfAllRegs(). Allocated once in the constructor for
- // efficiency.
- //
- std::vector<bool> IsColorUsedArr;
-
-
-
- //--------------------------- private methods ------------------------------
-
- void pushAllIGNodes();
-
- bool pushUnconstrainedIGNodes();
-
- IGNode * getIGNodeWithMinSpillCost();
-
- void colorIGNode(IGNode *const Node);
-
-
- public:
-
- RegClass(const Function *M,
- const TargetRegClassInfo *MRC,
- const ReservedColorListType *RCL = 0);
-
- inline void createInterferenceGraph() { IG.createGraph(); }
-
- inline InterferenceGraph &getIG() { return IG; }
-
- inline const unsigned getID() const { return RegClassID; }
-
- // main method called for coloring regs
- //
- void colorAllRegs();
-
- inline unsigned getNumOfAvailRegs() const
- { return MRC->getNumOfAvailRegs(); }
-
-
- // --- following methods are provided to access the IG contained within this
- // ---- RegClass easilly.
-
- inline void addLRToIG(LiveRange *const LR)
- { IG.addLRToIG(LR); }
-
- inline void setInterference(const LiveRange *const LR1,
- const LiveRange *const LR2)
- { IG.setInterference(LR1, LR2); }
-
- inline unsigned getInterference(const LiveRange *const LR1,
- const LiveRange *const LR2) const
- { return IG.getInterference(LR1, LR2); }
-
- inline void mergeIGNodesOfLRs(const LiveRange *const LR1,
- LiveRange *const LR2)
- { IG.mergeIGNodesOfLRs(LR1, LR2); }
-
-
- inline std::vector<bool> &getIsColorUsedArr() { return IsColorUsedArr; }
-
-
- void printIGNodeList() const;
- void printIG();
-};
-
-#endif