1 //===-- SystemZRegisterInfo.h - SystemZ register information ----*- 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 #ifndef SystemZREGISTERINFO_H 11 #define SystemZREGISTERINFO_H 12 13 #include "SystemZ.h" 14 #include "llvm/Target/TargetRegisterInfo.h" 15 16 #define GET_REGINFO_HEADER 17 #include "SystemZGenRegisterInfo.inc" 18 19 namespace llvm { 20 21 namespace SystemZ { 22 // Return the subreg to use for referring to the even and odd registers 23 // in a GR128 pair. Is32Bit says whether we want a GR32 or GR64. 24 inline unsigned even128(bool Is32bit) { 25 return Is32bit ? subreg_hl32 : subreg_h64; 26 } 27 inline unsigned odd128(bool Is32bit) { 28 return Is32bit ? subreg_l32 : subreg_l64; 29 } 30 } // end namespace SystemZ 31 32 struct SystemZRegisterInfo : public SystemZGenRegisterInfo { 33 public: 34 SystemZRegisterInfo(); 35 36 // Override TargetRegisterInfo.h. 37 bool requiresRegisterScavenging(const MachineFunction &MF) const override { 38 return true; 39 } 40 bool requiresFrameIndexScavenging(const MachineFunction &MF) const override { 41 return true; 42 } 43 bool trackLivenessAfterRegAlloc(const MachineFunction &MF) const override { 44 return true; 45 } 46 const MCPhysReg *getCalleeSavedRegs(const MachineFunction *MF = nullptr) const 47 override; 48 const uint32_t *getCallPreservedMask(CallingConv::ID CC) const override; 49 BitVector getReservedRegs(const MachineFunction &MF) const override; 50 void eliminateFrameIndex(MachineBasicBlock::iterator MI, 51 int SPAdj, unsigned FIOperandNum, 52 RegScavenger *RS) const override; 53 unsigned getFrameRegister(const MachineFunction &MF) const override; 54 }; 55 56 } // end namespace llvm 57 58 #endif 59
