1 //===- ThumbRegisterInfo.h - Thumb 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 implementation of the TargetRegisterInfo 11 // class. With the exception of emitLoadConstPool Thumb2 tracks 12 // ARMBaseRegisterInfo, Thumb1 overloads the functions below. 13 // 14 //===----------------------------------------------------------------------===// 15 16 #ifndef LLVM_LIB_TARGET_ARM_THUMB1REGISTERINFO_H 17 #define LLVM_LIB_TARGET_ARM_THUMB1REGISTERINFO_H 18 19 #include "ARMBaseRegisterInfo.h" 20 #include "llvm/Target/TargetRegisterInfo.h" 21 22 namespace llvm { 23 class ARMSubtarget; 24 class ARMBaseInstrInfo; 25 26 struct ThumbRegisterInfo : public ARMBaseRegisterInfo { 27 public: 28 ThumbRegisterInfo(); 29 30 const TargetRegisterClass * 31 getLargestLegalSuperClass(const TargetRegisterClass *RC, 32 const MachineFunction &MF) const override; 33 34 const TargetRegisterClass * 35 getPointerRegClass(const MachineFunction &MF, 36 unsigned Kind = 0) const override; 37 38 /// emitLoadConstPool - Emits a load from constpool to materialize the 39 /// specified immediate. 40 void 41 emitLoadConstPool(MachineBasicBlock &MBB, MachineBasicBlock::iterator &MBBI, 42 DebugLoc dl, unsigned DestReg, unsigned SubIdx, int Val, 43 ARMCC::CondCodes Pred = ARMCC::AL, unsigned PredReg = 0, 44 unsigned MIFlags = MachineInstr::NoFlags) const override; 45 46 // rewrite MI to access 'Offset' bytes from the FP. Update Offset to be 47 // however much remains to be handled. Return 'true' if no further 48 // work is required. 49 bool rewriteFrameIndex(MachineBasicBlock::iterator II, unsigned FrameRegIdx, 50 unsigned FrameReg, int &Offset, 51 const ARMBaseInstrInfo &TII) const; 52 void resolveFrameIndex(MachineInstr &MI, unsigned BaseReg, 53 int64_t Offset) const override; 54 bool saveScavengerRegister(MachineBasicBlock &MBB, 55 MachineBasicBlock::iterator I, 56 MachineBasicBlock::iterator &UseMI, 57 const TargetRegisterClass *RC, 58 unsigned Reg) const override; 59 void eliminateFrameIndex(MachineBasicBlock::iterator II, 60 int SPAdj, unsigned FIOperandNum, 61 RegScavenger *RS = nullptr) const override; 62 }; 63 } 64 65 #endif 66
