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100 lines
2.9 KiB
C++
100 lines
2.9 KiB
C++
//===-- llvm/Target/RegInfo.h - Target Register Information ------*- C++ -*-==//
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//
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// This file is used to describe the register system of a target to the register
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// allocator.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_TARGET_REGINFO_H
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#define LLVM_TARGET_REGINFO_H
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class LiveRangeInfo;
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class Method;
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class Instruction;
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class LiveRange;
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class AddedInstrns;
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class MachineInstr;
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//-----------------------------------------------------------------------------
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// class MachineRegClassInfo
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//
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// Purpose:
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// Interface to description of machine register class (e.g., int reg class
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// float reg class etc)
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//
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//--------------------------------------------------------------------------
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class IGNode;
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class MachineRegClassInfo {
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protected:
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const unsigned RegClassID; // integer ID of a reg class
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const unsigned NumOfAvailRegs; // # of avail for coloring -without SP etc.
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const unsigned NumOfAllRegs; // # of all registers -including SP,g0 etc.
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public:
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inline unsigned getRegClassID() const { return RegClassID; }
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inline unsigned getNumOfAvailRegs() const { return NumOfAvailRegs; }
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inline unsigned getNumOfAllRegs() const { return NumOfAllRegs; }
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// This method should find a color which is not used by neighbors
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// (i.e., a false position in IsColorUsedArr) and
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virtual void colorIGNode(IGNode * Node, bool IsColorUsedArr[] ) const = 0;
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MachineRegClassInfo(const unsigned ID, const unsigned NVR,
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const unsigned NAR): RegClassID(ID), NumOfAvailRegs(NVR),
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NumOfAllRegs(NAR) { }
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};
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//---------------------------------------------------------------------------
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// class MachineRegInfo
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//
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// Purpose:
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// Interface to register info of target machine
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//
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//--------------------------------------------------------------------------
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typedef hash_map<const MachineInstr *, AddedInstrns *> AddedInstrMapType;
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// A vector of all machine register classes
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typedef vector<const MachineRegClassInfo *> MachineRegClassArrayType;
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class MachineRegInfo : public NonCopyableV {
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protected:
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MachineRegClassArrayType MachineRegClassArr;
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public:
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inline unsigned int getNumOfRegClasses() const {
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return MachineRegClassArr.size();
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}
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const MachineRegClassInfo *const getMachineRegClass(unsigned i) const {
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return MachineRegClassArr[i];
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}
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virtual unsigned getRegClassIDOfValue (const Value *const Val) const = 0;
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virtual void colorArgs(const Method *const Meth,
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LiveRangeInfo & LRI) const = 0;
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virtual void colorCallArgs(vector<const Instruction *> & CallInstrList,
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LiveRangeInfo& LRI,
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AddedInstrMapType& AddedInstrMap ) const = 0;
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virtual int getUnifiedRegNum(int RegClassID, int reg) const = 0;
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virtual const string getUnifiedRegName(int reg) const = 0;
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//virtual void printReg(const LiveRange *const LR) const =0;
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MachineRegInfo() { }
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};
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#endif
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