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 "ARM.h" 19 #include "ARMBaseRegisterInfo.h" 20 #include "llvm/Target/TargetRegisterInfo.h" 21 22 namespace llvm { 23 class ARMSubtarget; 24 class ARMBaseInstrInfo; 25 26 struct Thumb1RegisterInfo : public ARMBaseRegisterInfo { 27 public: 28 Thumb1RegisterInfo(const ARMBaseInstrInfo &tii, const ARMSubtarget &STI); 29 30 const TargetRegisterClass* 31 getLargestLegalSuperClass(const TargetRegisterClass *RC) const; 32 33 const TargetRegisterClass* 34 getPointerRegClass(const MachineFunction &MF, unsigned Kind = 0) const; 35 36 /// emitLoadConstPool - Emits a load from constpool to materialize the 37 /// specified immediate. 38 void emitLoadConstPool(MachineBasicBlock &MBB, 39 MachineBasicBlock::iterator &MBBI, 40 DebugLoc dl, 41 unsigned DestReg, unsigned SubIdx, int Val, 42 ARMCC::CondCodes Pred = ARMCC::AL, 43 unsigned PredReg = 0, 44 unsigned MIFlags = MachineInstr::NoFlags) const; 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(MachineBasicBlock::iterator I, 53 unsigned BaseReg, int64_t Offset) const; 54 bool saveScavengerRegister(MachineBasicBlock &MBB, 55 MachineBasicBlock::iterator I, 56 MachineBasicBlock::iterator &UseMI, 57 const TargetRegisterClass *RC, 58 unsigned Reg) const; 59 void eliminateFrameIndex(MachineBasicBlock::iterator II, 60 int SPAdj, unsigned FIOperandNum, 61 RegScavenger *RS = NULL) const; 62 }; 63 } 64 65 #endif // THUMB1REGISTERINFO_H 66
