| //===-- PPCRegisterInfo.h - PowerPC Register Information Impl ---*- C++ -*-===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is distributed under the University of Illinois Open Source |
| // License. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| // |
| // This file contains the PowerPC implementation of the TargetRegisterInfo |
| // class. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #ifndef LLVM_LIB_TARGET_POWERPC_PPCREGISTERINFO_H |
| #define LLVM_LIB_TARGET_POWERPC_PPCREGISTERINFO_H |
| |
| #include "PPC.h" |
| #include "llvm/ADT/DenseMap.h" |
| |
| #define GET_REGINFO_HEADER |
| #include "PPCGenRegisterInfo.inc" |
| |
| namespace llvm { |
| class PPCSubtarget; |
| class TargetInstrInfo; |
| class Type; |
| |
| class PPCRegisterInfo : public PPCGenRegisterInfo { |
| DenseMap<unsigned, unsigned> ImmToIdxMap; |
| const PPCSubtarget &Subtarget; |
| public: |
| PPCRegisterInfo(const PPCSubtarget &SubTarget); |
| |
| /// getPointerRegClass - Return the register class to use to hold pointers. |
| /// This is used for addressing modes. |
| const TargetRegisterClass * |
| getPointerRegClass(const MachineFunction &MF, unsigned Kind=0) const override; |
| |
| unsigned getRegPressureLimit(const TargetRegisterClass *RC, |
| MachineFunction &MF) const override; |
| |
| const TargetRegisterClass* |
| getLargestLegalSuperClass(const TargetRegisterClass *RC) const override; |
| |
| /// Code Generation virtual methods... |
| const MCPhysReg * |
| getCalleeSavedRegs(const MachineFunction* MF =nullptr) const override; |
| const uint32_t *getCallPreservedMask(CallingConv::ID CC) const override; |
| const uint32_t *getNoPreservedMask() const; |
| |
| void adjustStackMapLiveOutMask(uint32_t *Mask) const override; |
| |
| BitVector getReservedRegs(const MachineFunction &MF) const override; |
| |
| /// We require the register scavenger. |
| bool requiresRegisterScavenging(const MachineFunction &MF) const override { |
| return true; |
| } |
| |
| bool requiresFrameIndexScavenging(const MachineFunction &MF) const override { |
| return true; |
| } |
| |
| bool trackLivenessAfterRegAlloc(const MachineFunction &MF) const override { |
| return true; |
| } |
| |
| bool requiresVirtualBaseRegisters(const MachineFunction &MF) const override { |
| return true; |
| } |
| |
| void lowerDynamicAlloc(MachineBasicBlock::iterator II) const; |
| void lowerCRSpilling(MachineBasicBlock::iterator II, |
| unsigned FrameIndex) const; |
| void lowerCRRestore(MachineBasicBlock::iterator II, |
| unsigned FrameIndex) const; |
| void lowerCRBitSpilling(MachineBasicBlock::iterator II, |
| unsigned FrameIndex) const; |
| void lowerCRBitRestore(MachineBasicBlock::iterator II, |
| unsigned FrameIndex) const; |
| void lowerVRSAVESpilling(MachineBasicBlock::iterator II, |
| unsigned FrameIndex) const; |
| void lowerVRSAVERestore(MachineBasicBlock::iterator II, |
| unsigned FrameIndex) const; |
| |
| bool hasReservedSpillSlot(const MachineFunction &MF, unsigned Reg, |
| int &FrameIdx) const override; |
| void eliminateFrameIndex(MachineBasicBlock::iterator II, |
| int SPAdj, unsigned FIOperandNum, |
| RegScavenger *RS = nullptr) const override; |
| |
| // Support for virtual base registers. |
| bool needsFrameBaseReg(MachineInstr *MI, int64_t Offset) const override; |
| void materializeFrameBaseRegister(MachineBasicBlock *MBB, |
| unsigned BaseReg, int FrameIdx, |
| int64_t Offset) const override; |
| void resolveFrameIndex(MachineInstr &MI, unsigned BaseReg, |
| int64_t Offset) const override; |
| bool isFrameOffsetLegal(const MachineInstr *MI, |
| int64_t Offset) const override; |
| |
| // Debug information queries. |
| unsigned getFrameRegister(const MachineFunction &MF) const override; |
| |
| // Base pointer (stack realignment) support. |
| unsigned getBaseRegister(const MachineFunction &MF) const; |
| bool hasBasePointer(const MachineFunction &MF) const; |
| bool canRealignStack(const MachineFunction &MF) const; |
| bool needsStackRealignment(const MachineFunction &MF) const override; |
| }; |
| |
| } // end namespace llvm |
| |
| #endif |