mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-07-19 19:30:10 +00:00
4bc86976bb
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@603 91177308-0d34-0410-b5e6-96231b3b80d8
122 lines
3.3 KiB
C++
122 lines
3.3 KiB
C++
/* Title: RegClass.h -*- C++ -*-
|
|
Author: Ruchira Sasanka
|
|
Date: Aug 20, 01
|
|
Purpose: Contains machine independent methods for register coloring.
|
|
|
|
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 (MachineRegInfo class) to
|
|
get hardware specific info and color and indidual 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.
|
|
|
|
*/
|
|
|
|
#ifndef REG_CLASS_H
|
|
#define REG_CLASS_H
|
|
|
|
#include "llvm/CodeGen/IGNode.h"
|
|
#include "llvm/CodeGen/InterferenceGraph.h"
|
|
#include "llvm/Target/TargetMachine.h"
|
|
#include "llvm/Target/MachineRegInfo.h"
|
|
#include <stack>
|
|
|
|
typedef vector<unsigned int> ReservedColorListType;
|
|
|
|
|
|
class RegClass
|
|
{
|
|
|
|
private:
|
|
const Method *const Meth; // Method we are working on
|
|
|
|
const MachineRegClassInfo *const MRC; // corresponding MRC
|
|
|
|
const unsigned RegClassID; // my int ID
|
|
|
|
InterferenceGraph IG; // Interference graph - constructed by
|
|
// buildInterferenceGraph
|
|
stack <IGNode *> IGNodeStack; // the stack used for coloring
|
|
|
|
// for passing registered that are pre-allocated (e.g., %g's)
|
|
const ReservedColorListType *const ReservedColorList;
|
|
|
|
// An array used for coloring each node. This array must be of size
|
|
// MRC->getNumOfAllRegs(). Allocated once in the constructor
|
|
// for efficiency.
|
|
bool *IsColorUsedArr;
|
|
|
|
|
|
//------------ private methods ------------------
|
|
|
|
void pushAllIGNodes();
|
|
bool pushUnconstrainedIGNodes();
|
|
IGNode * getIGNodeWithMinSpillCost();
|
|
void colorIGNode(IGNode *const Node);
|
|
|
|
public:
|
|
|
|
RegClass(const Method *const M,
|
|
const MachineRegClassInfo *const MRC,
|
|
const ReservedColorListType *const RCL = NULL);
|
|
|
|
inline void createInterferenceGraph()
|
|
{ IG.createGraph(); }
|
|
|
|
inline InterferenceGraph &getIG() { return IG; }
|
|
|
|
inline const unsigned getID() const { return RegClassID; }
|
|
|
|
void colorAllRegs(); // main method called for coloring regs
|
|
|
|
inline unsigned getNumOfAvailRegs() const
|
|
{ return MRC->getNumOfAvailRegs(); }
|
|
|
|
~RegClass() { delete[] IsColorUsedArr; };
|
|
|
|
|
|
|
|
// --- 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 void printIGNodeList() const {
|
|
cout << "IG Nodes for Register Class " << RegClassID << ":" << endl;
|
|
IG.printIGNodeList();
|
|
}
|
|
|
|
inline void printIG() {
|
|
cout << "IG for Register Class " << RegClassID << ":" << endl;
|
|
IG.printIG();
|
|
}
|
|
|
|
};
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
#endif
|