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cpMem<->Reg functions now support CC registers (int and FP) correctly.

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A scratch register has to be provided when needed to do the copy.
Also, cpMem<->Reg functions now return a vector of machine instructions.

Added several get{Class,Type} functions.

Suggest/Color methods may modify the MachineInstr (and always did),
so don't make that argument const!

llvm-svn: 2824
This commit is contained in:
Vikram S. Adve 2002-07-08 22:44:14 +00:00
parent bacbe6b240
commit bfd03d50ce
1 changed files with 42 additions and 24 deletions
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66
include/llvm/Target/TargetRegInfo.h
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@ -87,14 +87,15 @@ public:
// According the definition of a MachineOperand class, a Value in a
// machine instruction can go into either a normal register or a
// condition code register. If isCCReg is true below, the ID of the condition
// code regiter class will be returned. Otherwise, the normal register
// code register class will be returned. Otherwise, the normal register
// class (eg. int, float) must be returned.
virtual unsigned getRegClassIDOfType (const Type *type,
bool isCCReg = false) const =0;
virtual unsigned getRegClassIDOfValue (const Value *Val,
bool isCCReg = false) const =0;
virtual unsigned getRegClassIDOfReg (int unifiedRegNum) const =0;
virtual unsigned getRegClassIDOfRegType(int regType) const =0;
inline unsigned int getNumOfRegClasses() const {
return MachineRegClassArr.size();
}
@ -120,20 +121,20 @@ public:
virtual void suggestRegs4MethodArgs(const Function *Func,
LiveRangeInfo &LRI) const = 0;
virtual void suggestRegs4CallArgs(const MachineInstr *CallI,
virtual void suggestRegs4CallArgs(MachineInstr *CallI,
LiveRangeInfo &LRI, std::vector<RegClass *> RCL) const = 0;
virtual void suggestReg4RetValue(const MachineInstr *RetI,
virtual void suggestReg4RetValue(MachineInstr *RetI,
LiveRangeInfo &LRI) const = 0;
virtual void colorMethodArgs(const Function *Func, LiveRangeInfo &LRI,
AddedInstrns *FirstAI) const = 0;
virtual void colorCallArgs(const MachineInstr *CalI,
virtual void colorCallArgs(MachineInstr *CalI,
LiveRangeInfo& LRI, AddedInstrns *CallAI,
PhyRegAlloc &PRA, const BasicBlock *BB) const = 0;
virtual void colorRetValue(const MachineInstr *RetI, LiveRangeInfo &LRI,
virtual void colorRetValue(MachineInstr *RetI, LiveRangeInfo &LRI,
AddedInstrns *RetAI) const = 0;
@ -143,15 +144,29 @@ public:
// interface. However, they can be moved to MachineInstrInfo interface if
// necessary.
//
virtual void cpReg2RegMI(unsigned SrcReg, unsigned DestReg,
int RegType, std::vector<MachineInstr*>& mvec) const = 0;
virtual void cpReg2MemMI(unsigned SrcReg, unsigned DestPtrReg, int Offset,
int RegTypee, std::vector<MachineInstr*>& mvec) const=0;
virtual void cpMem2RegMI(unsigned SrcPtrReg, int Offset, unsigned DestReg,
int RegTypee, std::vector<MachineInstr*>& mvec) const=0;
// The function regTypeNeedsScratchReg() can be used to check whether a
// scratch register is needed to copy a register of type `regType' to
// or from memory. If so, such a scratch register can be provided by
// the caller (e.g., if it knows which regsiters are free); otherwise
// an arbitrary one will be chosen and spilled by the copy instructions.
// If a scratch reg is needed, the reg. type that must be used
// for scratch registers is returned in scratchRegType.
//
virtual bool regTypeNeedsScratchReg(int RegType,
int& scratchRegType) const = 0;
virtual void cpReg2RegMI(std::vector<MachineInstr*>& mvec,
unsigned SrcReg, unsigned DestReg,
int RegType) const = 0;
virtual void cpReg2MemMI(std::vector<MachineInstr*>& mvec,
unsigned SrcReg, unsigned DestPtrReg, int Offset,
int RegType, int scratchReg = -1) const=0;
virtual void cpMem2RegMI(std::vector<MachineInstr*>& mvec,
unsigned SrcPtrReg, int Offset, unsigned DestReg,
int RegType, int scratchReg = -1) const=0;
virtual void cpValue2Value(Value *Src, Value *Dest,
std::vector<MachineInstr*>& mvec) const = 0;
@ -170,21 +185,24 @@ public:
// Each register class has a seperate space for register IDs. To convert
// a regId in a register class to a common Id, we use the folloing method(s)
// a regId in a register class to a common Id, or vice versa,
// we use the folloing methods.
//
virtual int getUnifiedRegNum(int RegClassID, int reg) const = 0;
virtual int getUnifiedRegNum(unsigned regClassID, int reg) const = 0;
virtual int getClassRegNum(int unifiedRegNum, unsigned& regClassID) const =0;
// Returns the assembly-language name of the specified machine register.
virtual const std::string getUnifiedRegName(int UnifiedRegNum) const = 0;
// The following 4 methods are used to find the RegType (see enum above)
// of a LiveRange, Value and using the unified RegClassID
//
// The following 4 methods are used to find the RegType (a target-specific
// enum) for a reg class and a given primitive type, a LiveRange, a Value,
// or a particular machine register.
// The fifth function gives the reg class of the given RegType.
//
virtual int getRegType(unsigned regClassID, const Type* type) const = 0;
virtual int getRegType(const LiveRange *LR) const = 0;
virtual int getRegType(const Value *Val) const = 0;
virtual int getRegType(int reg) const = 0;
virtual int getRegType(int unifiedRegNum) const = 0;
// The following methods are used to get the frame/stack pointers
//
@ -202,7 +220,7 @@ public:
// an architecture. This must insert code for saving and restoring
// such registers on
//
virtual void insertCallerSavingCode(const MachineInstr *MInst,
virtual void insertCallerSavingCode(MachineInstr *MInst,
const BasicBlock *BB,
PhyRegAlloc &PRA) const = 0;