-// $Id$ -*- C++ -*--
//***************************************************************************
// File:
// SparcInternals.h
bool ignore;
if (this->maxImmedConstant(opCode, ignore) != 0)
{
- assert(! this->isStore((MachineOpCode) STB - 1)); // first store is STB
- assert(! this->isStore((MachineOpCode) STD + 1)); // last store is STD
- return (opCode >= STB && opCode <= STD)? 2 : 1;
+ assert(! this->isStore((MachineOpCode) STB - 1)); // 1st store opcode
+ assert(! this->isStore((MachineOpCode) STXFSR+1));// last store opcode
+ return (opCode >= STB && opCode <= STXFSR)? 2 : 1;
}
else
return -1;
// function args and return values etc.) with specific hardware registers
// as required. See SparcRegInfo.cpp for the implementation.
//
- void setCallOrRetArgCol(LiveRange *LR, unsigned RegNo,
- const MachineInstr *MI,
- std::hash_map<const MachineInstr *,
- AddedInstrns *> &AIMap) const;
-
- MachineInstr *getCopy2RegMI(const Value *SrcVal, unsigned Reg,
- unsigned RegClassID) const;
-
- void suggestReg4RetAddr(const MachineInstr *RetMI,
+ void suggestReg4RetAddr(MachineInstr *RetMI,
LiveRangeInfo &LRI) const;
- void suggestReg4CallAddr(const MachineInstr *CallMI, LiveRangeInfo &LRI,
+ void suggestReg4CallAddr(MachineInstr *CallMI, LiveRangeInfo &LRI,
std::vector<RegClass *> RCList) const;
-
- void InitializeOutgoingArg(const MachineInstr* CallMI, AddedInstrns *CallAI,
+
+ void InitializeOutgoingArg(MachineInstr* CallMI, AddedInstrns *CallAI,
PhyRegAlloc &PRA, LiveRange* LR,
unsigned regType, unsigned RegClassID,
int UniArgReg, unsigned int argNo,
const;
// The following 4 methods are used to find the RegType (see enum above)
- // of a LiveRange, Value and using the unified RegClassID
+ // 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.
+ //
int getRegType(unsigned regClassID, const Type* type) const;
int getRegType(const LiveRange *LR) const;
int getRegType(const Value *Val) const;
- int getRegType(int reg) const;
-
-
- // The following methods are used to generate copy instructions to move
- // data between condition code registers
- //
- MachineInstr *cpCCR2IntMI(unsigned IntReg) const;
- MachineInstr *cpInt2CCRMI(unsigned IntReg) const;
+ int getRegType(int unifiedRegNum) const;
// Used to generate a copy instruction based on the register class of
// value.
// To find the register class used for a specified Type
//
- inline unsigned getRegClassIDOfType(const Type *type,
- bool isCCReg = false) const {
- Type::PrimitiveID ty = type->getPrimitiveID();
- unsigned res;
-
- // FIXME: Comparing types like this isn't very safe...
- if ((ty && ty <= Type::LongTyID) || (ty == Type::LabelTyID) ||
- (ty == Type::FunctionTyID) || (ty == Type::PointerTyID) )
- res = IntRegClassID; // sparc int reg (ty=0: void)
- else if (ty <= Type::DoubleTyID)
- res = FloatRegClassID; // sparc float reg class
- else {
- //std::cerr << "TypeID: " << ty << "\n";
- assert(0 && "Cannot resolve register class for type");
- return 0;
- }
-
- if(isCCReg)
- return res + 2; // corresponidng condition code regiser
- else
- return res;
- }
+ unsigned getRegClassIDOfType(const Type *type,
+ bool isCCReg = false) const;
// To find the register class of a Value
//
return getRegClassIDOfType(Val->getType(), isCCReg);
}
+ // To find the register class to which a specified register belongs
+ //
+ unsigned getRegClassIDOfReg(int unifiedRegNum) const;
+ unsigned getRegClassIDOfRegType(int regType) const;
-
// getZeroRegNum - returns the register that contains always zero this is the
// unified register number
//
void suggestRegs4MethodArgs(const Function *Meth,
LiveRangeInfo& LRI) const;
- void suggestRegs4CallArgs(const MachineInstr *CallMI,
+ void suggestRegs4CallArgs(MachineInstr *CallMI,
LiveRangeInfo& LRI,
std::vector<RegClass *> RCL) const;
- void suggestReg4RetValue(const MachineInstr *RetMI,
+ void suggestReg4RetValue(MachineInstr *RetMI,
LiveRangeInfo& LRI) const;
-
-
+
void colorMethodArgs(const Function *Meth, LiveRangeInfo &LRI,
AddedInstrns *FirstAI) const;
- void colorCallArgs(const MachineInstr *CallMI, LiveRangeInfo &LRI,
+ void colorCallArgs(MachineInstr *CallMI, LiveRangeInfo &LRI,
AddedInstrns *CallAI, PhyRegAlloc &PRA,
const BasicBlock *BB) const;
- void colorRetValue(const MachineInstr *RetI, LiveRangeInfo& LRI,
+ void colorRetValue(MachineInstr *RetI, LiveRangeInfo& LRI,
AddedInstrns *RetAI) const;
-
// method used for printing a register for debugging purposes
//
static void printReg(const LiveRange *LR);
- // this method provides a unique number for each register
+ // Each register class has a seperate space for register IDs. To convert
+ // a regId in a register class to a common Id, or vice versa,
+ // we use the folloing methods.
//
- inline int getUnifiedRegNum(int RegClassID, int reg) const {
-
- if( RegClassID == IntRegClassID && reg < 32 )
+ // This method provides a unique number for each register
+ inline int getUnifiedRegNum(unsigned regClassID, int reg) const {
+
+ if (regClassID == IntRegClassID) {
+ assert(reg < 32 && "Invalid reg. number");
return reg;
- else if ( RegClassID == FloatRegClassID && reg < 64)
+ }
+ else if (regClassID == FloatRegClassID) {
+ assert(reg < 64 && "Invalid reg. number");
return reg + 32; // we have 32 int regs
- else if( RegClassID == FloatCCRegClassID && reg < 4)
+ }
+ else if (regClassID == FloatCCRegClassID) {
+ assert(reg < 4 && "Invalid reg. number");
return reg + 32 + 64; // 32 int, 64 float
- else if( RegClassID == IntCCRegClassID )
- return reg + 4+ 32 + 64; // only int cc reg
- else if (reg==InvalidRegNum)
+ }
+ else if (regClassID == IntCCRegClassID ) {
+ assert(reg == 0 && "Invalid reg. number");
+ return reg + 4+ 32 + 64; // only one int CC reg
+ }
+ else if (reg==InvalidRegNum) {
return InvalidRegNum;
+ }
else
- assert(0 && "Invalid register class or reg number");
+ assert(0 && "Invalid register class");
return 0;
}
-
- // given the unified register number, this gives the name
- // for generating assembly code or debugging.
+
+ // This method converts the unified number to the number in its class,
+ // and returns the class ID in regClassID.
+ inline int getClassRegNum(int ureg, unsigned& regClassID) const {
+ if (ureg < 32) { regClassID = IntRegClassID; return ureg; }
+ else if (ureg < 32+64) { regClassID = FloatRegClassID; return ureg-32; }
+ else if (ureg < 4 +96) { regClassID = FloatCCRegClassID; return ureg-96; }
+ else if (ureg < 1 +100) { regClassID = IntCCRegClassID; return ureg-100;}
+ else if (ureg == InvalidRegNum) { return InvalidRegNum; }
+ else { assert(0 && "Invalid unified register number"); }
+ return 0;
+ }
+
+ // Returns the assembly-language name of the specified machine register.
//
virtual const std::string getUnifiedRegName(int reg) const;
// The following methods are used to generate "copy" machine instructions
// for an architecture.
//
- void cpReg2RegMI(unsigned SrcReg, unsigned DestReg,
- int RegType, vector<MachineInstr*>& mvec) const;
-
- void cpReg2MemMI(unsigned SrcReg, unsigned DestPtrReg,
- int Offset, int RegType, vector<MachineInstr*>& mvec) const;
+ // 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.
+ //
+ bool regTypeNeedsScratchReg(int RegType,
+ int& scratchRegClassId) const;
+
+ void cpReg2RegMI(std::vector<MachineInstr*>& mvec,
+ unsigned SrcReg, unsigned DestReg,
+ int RegType) const;
+
+ void cpReg2MemMI(std::vector<MachineInstr*>& mvec,
+ unsigned SrcReg, unsigned DestPtrReg,
+ int Offset, int RegType, int scratchReg = -1) const;
- void cpMem2RegMI(unsigned SrcPtrReg, int Offset, unsigned DestReg,
- int RegType, vector<MachineInstr*>& mvec) const;
+ void cpMem2RegMI(std::vector<MachineInstr*>& mvec,
+ unsigned SrcPtrReg, int Offset, unsigned DestReg,
+ int RegType, int scratchReg = -1) const;
void cpValue2Value(Value *Src, Value *Dest,
- vector<MachineInstr*>& mvec) const;
+ std::vector<MachineInstr*>& mvec) const;
// To see whether a register is a volatile (i.e., whehter it must be
// preserved acorss calls)
// This method inserts the caller saving code for call instructions
//
- void insertCallerSavingCode(const MachineInstr *MInst,
+ void insertCallerSavingCode(std::vector<MachineInstr*>& instrnsBefore,
+ std::vector<MachineInstr*>& instrnsAfter,
+ MachineInstr *MInst,
const BasicBlock *BB, PhyRegAlloc &PRA ) const;
};
projects / oota-llvm.git / blobdiff