// This defaults to marking a single register but may mark multiple
// registers when a single number denotes paired registers.
//
- virtual void markColorsUsed(unsigned RegInClass,
+ void markColorsUsed(unsigned RegInClass,
int UserRegType,
int RegTypeWanted,
std::vector<bool> &IsColorUsedArr) const {
// for paired registers and other such silliness.
// It returns -1 if no unused color is found.
//
- virtual int findUnusedColor(int RegTypeWanted,
+ int findUnusedColor(int RegTypeWanted,
const std::vector<bool> &IsColorUsedArr) const {
// find first unused color in the IsColorUsedArr directly
unsigned NC = this->getNumOfAvailRegs();
// This method should find a color which is not used by neighbors
// (i.e., a false position in IsColorUsedArr) and
- virtual void colorIGNode(IGNode *Node,
- const std::vector<bool> &IsColorUsedArr) const = 0;
+ void colorIGNode(IGNode *Node,
+ const std::vector<bool> &IsColorUsedArr) const;
// Check whether a specific register is volatile, i.e., whether it is not
// preserved across calls
- virtual bool isRegVolatile(int Reg) const = 0;
+ bool isRegVolatile(int Reg) const;
// Check whether a specific register is modified as a side-effect of the
// call instruction itself,
- virtual bool modifiedByCall(int Reg) const {return false; }
+ bool modifiedByCall(int Reg) const {return false; }
- virtual const char* const getRegName(unsigned reg) const = 0;
+ virtual const char* const getRegName(unsigned reg) const;
TargetRegClassInfo(unsigned ID, unsigned NVR, unsigned NAR)
: RegClassID(ID), NumOfAvailRegs(NVR), NumOfAllRegs(NAR) {}
};
-
-//---------------------------------------------------------------------------
-/// TargetRegInfo - Interface to register info of target machine
+/// SparcV9RegInfo - Interface to register info of SparcV9 target machine
///
-class TargetRegInfo {
- TargetRegInfo(const TargetRegInfo &); // DO NOT IMPLEMENT
- void operator=(const TargetRegInfo &); // DO NOT IMPLEMENT
+class SparcV9RegInfo {
+ SparcV9RegInfo(const SparcV9RegInfo &); // DO NOT IMPLEMENT
+ void operator=(const SparcV9RegInfo &); // DO NOT IMPLEMENT
protected:
// A vector of all machine register classes
//
//
static int getInvalidRegNum() { return -1; }
- TargetRegInfo(const TargetMachine& tgt) : target(tgt) { }
- virtual ~TargetRegInfo() {
- for (unsigned i = 0, e = MachineRegClassArr.size(); i != e; ++i)
- delete MachineRegClassArr[i];
- }
// 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 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 getRegClassIDOfRegType(int regType) const = 0;
+
+ // To find the register class used for a specified Type
+ //
+ unsigned getRegClassIDOfType (const Type *type,
+ bool isCCReg = false) const;
+
+ // To find the register class to which a specified register belongs
+ //
+ unsigned getRegClassIDOfRegType(int regType) const;
unsigned getRegClassIDOfReg(int unifiedRegNum) const {
unsigned classId = 0;
return MachineRegClassArr[i];
}
- // returns the register that is hardwired to zero if any (-1 if none)
+ // getZeroRegNum - returns the register that is hardwired to always contain
+ // zero, if any (-1 if none). This is the unified register number.
//
- virtual unsigned getZeroRegNum() const = 0;
-
- // Number of registers used for passing int args (usually 6: %o0 - %o5)
- // and float args (usually 32: %f0 - %f31)
- //
- virtual unsigned const getNumOfIntArgRegs() const = 0;
- virtual unsigned const getNumOfFloatArgRegs() const = 0;
+ unsigned getZeroRegNum() const;
// The following methods are used to color special live ranges (e.g.
// method args and return values etc.) with specific hardware registers
// as required. See SparcRegInfo.cpp for the implementation for Sparc.
//
- virtual void suggestRegs4MethodArgs(const Function *Func,
- LiveRangeInfo& LRI) const = 0;
+ void suggestRegs4MethodArgs(const Function *Func,
+ LiveRangeInfo& LRI) const;
- virtual void suggestRegs4CallArgs(MachineInstr *CallI,
- LiveRangeInfo& LRI) const = 0;
+ void suggestRegs4CallArgs(MachineInstr *CallI,
+ LiveRangeInfo& LRI) const;
- virtual void suggestReg4RetValue(MachineInstr *RetI,
- LiveRangeInfo& LRI) const = 0;
+ void suggestReg4RetValue(MachineInstr *RetI,
+ LiveRangeInfo& LRI) const;
- virtual void colorMethodArgs(const Function *Func,
+ void colorMethodArgs(const Function *Func,
LiveRangeInfo &LRI,
std::vector<MachineInstr*>& InstrnsBefore,
- std::vector<MachineInstr*>& InstrnsAfter) const = 0;
-
- // The following methods are used to generate "copy" machine instructions
- // for an architecture. Currently they are used in TargetRegClass
- // interface. However, they can be moved to TargetInstrInfo interface if
- // necessary.
- //
- // 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;
+ std::vector<MachineInstr*>& InstrnsAfter) const;
- 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;
// Check whether a specific register is volatile, i.e., whether it is not
// preserved across calls
- inline virtual bool isRegVolatile(int RegClassID, int Reg) const {
+ inline bool isRegVolatile(int RegClassID, int Reg) const {
return MachineRegClassArr[RegClassID]->isRegVolatile(Reg);
}
// Check whether a specific register is modified as a side-effect of the
// call instruction itself,
- inline virtual bool modifiedByCall(int RegClassID, int Reg) const {
+ inline bool modifiedByCall(int RegClassID, int Reg) const {
return MachineRegClassArr[RegClassID]->modifiedByCall(Reg);
}
- // Returns the reg used for pushing the address when a method is called.
- // This can be used for other purposes between calls
+ // getCallAddressReg - Returns the reg used for pushing the address
+ // when a method is called. This can be used for other purposes
+ // between calls
//
- virtual unsigned getCallAddressReg() const = 0;
+ unsigned getCallAddressReg() const;
- // Returns the register containing the return address.
- //It should be made sure that this
- // register contains the return value when a return instruction is reached.
- //
- virtual unsigned getReturnAddressReg() const = 0;
-
// Each register class has a separate space for register IDs. To convert
// a regId in a register class to a common Id, or vice versa,
// we use the folloing two methods.
return MachineRegClassArr[regClassID]->getRegName(regNumInClass);
}
- // Get the register type for a register identified different ways.
- // Note that getRegTypeForLR(LR) != getRegTypeForDataType(LR->getType())!
- // The reg class of a LR depends both on the Value types in it and whether
- // they are CC registers or not (for example).
- virtual int getRegTypeForDataType(const Type* type) const = 0;
- virtual int getRegTypeForLR(const LiveRange *LR) const = 0;
- virtual int getRegType(int unifiedRegNum) const = 0;
-
- // The following methods are used to get the frame/stack pointers
- //
- virtual unsigned getFramePointer() const = 0;
- virtual unsigned getStackPointer() const = 0;
-
// This method gives the the number of bytes of stack space allocated
- // to a register when it is spilled to the stack.
+ // to a register when it is spilled to the stack, according to its
+ // register type.
//
- virtual int getSpilledRegSize(int RegType) const = 0;
-};
-
+ // For SparcV9, currently we allocate 8 bytes on stack for all
+ // register types. We can optimize this later if necessary to save stack
+ // space (However, should make sure that stack alignment is correct)
+ //
+ int getSpilledRegSize(int RegType) const {
+ return 8;
+ }
-/// This class implements the virtual class TargetRegInfo for SparcV9.
-///
-class SparcV9RegInfo : public TargetRegInfo {
private:
// Number of registers used for passing int args (usually 6: %o0 - %o5)
//
SparcV9RegInfo(const SparcV9TargetMachine &tgt);
- // To find the register class used for a specified Type
- //
- unsigned getRegClassIDOfType(const Type *type,
- bool isCCReg = false) const;
-
- // To find the register class to which a specified register belongs
- //
- unsigned getRegClassIDOfRegType(int regType) const;
-
- // getZeroRegNum - returns the register that contains always zero this is the
- // unified register number
- //
- virtual unsigned getZeroRegNum() const;
-
- // getCallAddressReg - returns the reg used for pushing the address when a
- // function is called. This can be used for other purposes between calls
- //
- unsigned getCallAddressReg() const;
+ ~SparcV9RegInfo() {
+ for (unsigned i = 0, e = MachineRegClassArr.size(); i != e; ++i)
+ delete MachineRegClassArr[i];
+ }
// Returns the register containing the return address.
// It should be made sure that this register contains the return
int regNumForFPArg(unsigned RegType, bool inCallee, bool isVarArgsCall,
unsigned argNo, unsigned& regClassId) const;
- // The following methods are used to color special live ranges (e.g.
- // function args and return values etc.) with specific hardware registers
- // as required. See SparcV9RegInfo.cpp for the implementation for SparcV9.
- //
- void suggestRegs4MethodArgs(const Function *Meth,
- LiveRangeInfo& LRI) const;
-
- void suggestRegs4CallArgs(MachineInstr *CallMI,
- LiveRangeInfo& LRI) const;
-
- void suggestReg4RetValue(MachineInstr *RetMI,
- LiveRangeInfo& LRI) const;
-
- void colorMethodArgs(const Function *Meth, LiveRangeInfo& LRI,
- std::vector<MachineInstr*>& InstrnsBefore,
- std::vector<MachineInstr*>& InstrnsAfter) const;
// method used for printing a register for debugging purposes
//
void printReg(const LiveRange *LR) const;
-
- // returns the # of bytes of stack space allocated for each register
- // type. For SparcV9, currently we allocate 8 bytes on stack for all
- // register types. We can optimize this later if necessary to save stack
- // space (However, should make sure that stack alignment is correct)
- //
- inline int getSpilledRegSize(int RegType) const {
- return 8;
- }
// To obtain the return value and the indirect call address (if any)
// contained in a CALL machine instruction
const Value * getCallInstIndirectAddrVal(const MachineInstr *CallMI) const;
// The following methods are used to generate "copy" machine instructions
- // for an architecture.
+ // for an architecture. Currently they are used in TargetRegClass
+ // interface. However, they can be moved to TargetInstrInfo interface if
+ // necessary.
//
// 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.
//
+
bool regTypeNeedsScratchReg(int RegType,
int& scratchRegClassId) const;
int getRegTypeForLR(const LiveRange *LR) const;
int getRegType(int unifiedRegNum) const;
- virtual unsigned getFramePointer() const;
- virtual unsigned getStackPointer() const;
+ unsigned getFramePointer() const;
+ unsigned getStackPointer() const;
};
} // End llvm namespace
projects / oota-llvm.git / commitdiff