mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2025-10-30 16:17:05 +00:00
697954c15d
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@1503 91177308-0d34-0410-b5e6-96231b3b80d8
73 lines
2.0 KiB
C++
73 lines
2.0 KiB
C++
/* 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 "llvm/CodeGen/IGNode.h"
|
|
|
|
typedef std::vector <IGNode *> IGNodeListType;
|
|
|
|
|
|
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
|
|
IGNodeListType IGNodeList; // a list of all IGNodes in a reg class
|
|
|
|
// for asserting this IG node is infact in the IGNodeList of this class
|
|
inline void assertIGNode(const IGNode *const Node) const {
|
|
assert( IGNodeList[ Node->getIndex() ] == Node );
|
|
}
|
|
|
|
|
|
|
|
public:
|
|
|
|
// the matrix is not yet created by the constructor. Call createGraph()
|
|
// to create it after adding all IGNodes to the IGNodeList
|
|
|
|
InterferenceGraph(RegClass *const RC);
|
|
~InterferenceGraph();
|
|
|
|
void createGraph();
|
|
|
|
void addLRToIG(LiveRange *const LR);
|
|
|
|
void setInterference(const LiveRange *const LR1,
|
|
const LiveRange *const LR2 );
|
|
|
|
unsigned getInterference(const LiveRange *const LR1,
|
|
const LiveRange *const LR2 ) const ;
|
|
|
|
void mergeIGNodesOfLRs(const LiveRange *const LR1, LiveRange *const LR2);
|
|
|
|
inline IGNodeListType &getIGNodeList() { return IGNodeList; }
|
|
|
|
void setCurDegreeOfIGNodes();
|
|
|
|
void printIG() const;
|
|
void printIGNodeList() const;
|
|
};
|
|
|
|
#endif
|