diff --git a/include/llvm/Target/TargetRegInfo.h b/include/llvm/Target/TargetRegInfo.h deleted file mode 100644 index 3b268ced418..00000000000 --- a/include/llvm/Target/TargetRegInfo.h +++ /dev/null @@ -1,296 +0,0 @@ -//===-- llvm/Target/TargetRegInfo.h - Target Register Info ------*- C++ -*-===// -// -// The LLVM Compiler Infrastructure -// -// This file was developed by the LLVM research group and is distributed under -// the University of Illinois Open Source License. See LICENSE.TXT for details. -// -//===----------------------------------------------------------------------===// -// -// This file is used to describe the register system of a target to the -// register allocator. -// -//===----------------------------------------------------------------------===// - -#ifndef LLVM_TARGET_TARGETREGINFO_H -#define LLVM_TARGET_TARGETREGINFO_H - -#include "Support/hash_map" -#include -#include - -namespace llvm { - -class TargetMachine; -class IGNode; -class Type; -class Value; -class LiveRangeInfo; -class Function; -class LiveRange; -class AddedInstrns; -class MachineInstr; -class BasicBlock; - -///---------------------------------------------------------------------------- -/// Interface to description of machine register class (e.g., int reg class -/// float reg class etc) -/// -class TargetRegClassInfo { -protected: - const unsigned RegClassID; // integer ID of a reg class - const unsigned NumOfAvailRegs; // # of avail for coloring -without SP etc. - const unsigned NumOfAllRegs; // # of all registers -including SP,g0 etc. - -public: - inline unsigned getRegClassID() const { return RegClassID; } - inline unsigned getNumOfAvailRegs() const { return NumOfAvailRegs; } - inline unsigned getNumOfAllRegs() const { return NumOfAllRegs; } - - // This method marks the registers used for a given register number. - // This defaults to marking a single register but may mark multiple - // registers when a single number denotes paired registers. - // - virtual void markColorsUsed(unsigned RegInClass, - int UserRegType, - int RegTypeWanted, - std::vector &IsColorUsedArr) const { - assert(RegInClass < NumOfAllRegs && RegInClass < IsColorUsedArr.size()); - assert(UserRegType == RegTypeWanted && - "Default method is probably incorrect for class with multiple types."); - IsColorUsedArr[RegInClass] = true; - } - - // This method finds unused registers of the specified register type, - // using the given "used" flag array IsColorUsedArr. It defaults to - // checking a single entry in the array directly, but that can be overridden - // for paired registers and other such silliness. - // It returns -1 if no unused color is found. - // - virtual int findUnusedColor(int RegTypeWanted, - const std::vector &IsColorUsedArr) const { - // find first unused color in the IsColorUsedArr directly - unsigned NC = this->getNumOfAvailRegs(); - assert(IsColorUsedArr.size() >= NC && "Invalid colors-used array"); - for (unsigned c = 0; c < NC; c++) - if (!IsColorUsedArr[c]) - return c; - return -1; - } - - // 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 &IsColorUsedArr) const = 0; - - // Check whether a specific register is volatile, i.e., whether it is not - // preserved across calls - virtual bool isRegVolatile(int Reg) const = 0; - - // Check whether a specific register is modified as a side-effect of the - // call instruction itself, - virtual bool modifiedByCall(int Reg) const {return false; } - - virtual const char* const getRegName(unsigned reg) const = 0; - - TargetRegClassInfo(unsigned ID, unsigned NVR, unsigned NAR) - : RegClassID(ID), NumOfAvailRegs(NVR), NumOfAllRegs(NAR) {} -}; - - - -//--------------------------------------------------------------------------- -/// TargetRegInfo - Interface to register info of target machine -/// -class TargetRegInfo { - TargetRegInfo(const TargetRegInfo &); // DO NOT IMPLEMENT - void operator=(const TargetRegInfo &); // DO NOT IMPLEMENT -protected: - // A vector of all machine register classes - // - std::vector MachineRegClassArr; - -public: - const TargetMachine ⌖ - - // A register can be initialized to an invalid number. That number can - // be obtained using this method. - // - 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; - - unsigned getRegClassIDOfReg(int unifiedRegNum) const { - unsigned classId = 0; - (void) getClassRegNum(unifiedRegNum, classId); - return classId; - } - - unsigned int getNumOfRegClasses() const { - return MachineRegClassArr.size(); - } - - const TargetRegClassInfo *getMachineRegClass(unsigned i) const { - return MachineRegClassArr[i]; - } - - // returns the register that is hardwired to zero if any (-1 if none) - // - 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; - - // 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; - - virtual void suggestRegs4CallArgs(MachineInstr *CallI, - LiveRangeInfo& LRI) const = 0; - - virtual void suggestReg4RetValue(MachineInstr *RetI, - LiveRangeInfo& LRI) const = 0; - - virtual void colorMethodArgs(const Function *Func, - LiveRangeInfo &LRI, - std::vector& InstrnsBefore, - std::vector& 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& mvec, - unsigned SrcReg, unsigned DestReg, - int RegType) const = 0; - - virtual void cpReg2MemMI(std::vector& mvec, - unsigned SrcReg, unsigned DestPtrReg, int Offset, - int RegType, int scratchReg = -1) const=0; - - virtual void cpMem2RegMI(std::vector& mvec, - unsigned SrcPtrReg, int Offset, unsigned DestReg, - int RegType, int scratchReg = -1) const=0; - - virtual void cpValue2Value(Value *Src, Value *Dest, - std::vector& 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 { - 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 { - 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 - // - virtual unsigned getCallAddressReg() const = 0; - - // 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. - // - // This method converts from class reg. number to unified register number. - int getUnifiedRegNum(unsigned regClassID, int reg) const { - if (reg == getInvalidRegNum()) { return getInvalidRegNum(); } - assert(regClassID < getNumOfRegClasses() && "Invalid register class"); - int totalRegs = 0; - for (unsigned rcid = 0; rcid < regClassID; ++rcid) - totalRegs += MachineRegClassArr[rcid]->getNumOfAllRegs(); - return reg + totalRegs; - } - - // This method converts the unified number to the number in its class, - // and returns the class ID in regClassID. - int getClassRegNum(int uRegNum, unsigned& regClassID) const { - if (uRegNum == getInvalidRegNum()) { return getInvalidRegNum(); } - - int totalRegs = 0, rcid = 0, NC = getNumOfRegClasses(); - while (rcid < NC && - uRegNum>= totalRegs+(int)MachineRegClassArr[rcid]->getNumOfAllRegs()) - { - totalRegs += MachineRegClassArr[rcid]->getNumOfAllRegs(); - rcid++; - } - if (rcid == NC) { - assert(0 && "getClassRegNum(): Invalid register number"); - return getInvalidRegNum(); - } - regClassID = rcid; - return uRegNum - totalRegs; - } - - // Returns the assembly-language name of the specified machine register. - // - const char * const getUnifiedRegName(int UnifiedRegNum) const { - unsigned regClassID = getNumOfRegClasses(); // initialize to invalid value - int regNumInClass = getClassRegNum(UnifiedRegNum, regClassID); - 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 spaceallocated - // to a register when it is spilled to the stack. - // - virtual int getSpilledRegSize(int RegType) const = 0; -}; - -} // End llvm namespace - -#endif