1 //===- Thumb1RegisterInfo.h - Thumb-1 Register Information Impl -*- C++ -*-===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is distributed under the University of Illinois Open Source 6 // License. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 // 10 // This file contains the Thumb-1 implementation of the TargetRegisterInfo 11 // class. 12 // 13 //===----------------------------------------------------------------------===// 14 15 #ifndef THUMB1REGISTERINFO_H 16 #define THUMB1REGISTERINFO_H 17 18 #include "ARMBaseRegisterInfo.h" 19 #include "llvm/Target/TargetRegisterInfo.h" 20 21 namespace llvm { 22 class ARMSubtarget; 23 class ARMBaseInstrInfo; 24 25 struct Thumb1RegisterInfo : public ARMBaseRegisterInfo { 26 public: 27 Thumb1RegisterInfo(const ARMSubtarget &STI); 28 29 const TargetRegisterClass * 30 getLargestLegalSuperClass(const TargetRegisterClass *RC) const override; 31 32 const TargetRegisterClass * 33 getPointerRegClass(const MachineFunction &MF, 34 unsigned Kind = 0) const override; 35 36 /// emitLoadConstPool - Emits a load from constpool to materialize the 37 /// specified immediate. 38 void 39 emitLoadConstPool(MachineBasicBlock &MBB, MachineBasicBlock::iterator &MBBI, 40 DebugLoc dl, unsigned DestReg, unsigned SubIdx, int Val, 41 ARMCC::CondCodes Pred = ARMCC::AL, unsigned PredReg = 0, 42 unsigned MIFlags = MachineInstr::NoFlags) const override; 43 44 // rewrite MI to access 'Offset' bytes from the FP. Update Offset to be 45 // however much remains to be handled. Return 'true' if no further 46 // work is required. 47 bool rewriteFrameIndex(MachineBasicBlock::iterator II, unsigned FrameRegIdx, 48 unsigned FrameReg, int &Offset, 49 const ARMBaseInstrInfo &TII) const; 50 void resolveFrameIndex(MachineInstr &MI, unsigned BaseReg, 51 int64_t Offset) const override; 52 bool saveScavengerRegister(MachineBasicBlock &MBB, 53 MachineBasicBlock::iterator I, 54 MachineBasicBlock::iterator &UseMI, 55 const TargetRegisterClass *RC, 56 unsigned Reg) const override; 57 void eliminateFrameIndex(MachineBasicBlock::iterator II, 58 int SPAdj, unsigned FIOperandNum, 59 RegScavenger *RS = nullptr) const override; 60 }; 61 } 62 63 #endif // THUMB1REGISTERINFO_H 64
