SystemZRegisterInfo.h revision dce4a407a24b04eebc6a376f8e62b41aaa7b071f
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 19namespace llvm { 20 21namespace 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. 24inline unsigned even128(bool Is32bit) { 25 return Is32bit ? subreg_hl32 : subreg_h64; 26} 27inline unsigned odd128(bool Is32bit) { 28 return Is32bit ? subreg_l32 : subreg_l64; 29} 30} // end namespace SystemZ 31 32class SystemZSubtarget; 33class SystemZInstrInfo; 34 35struct SystemZRegisterInfo : public SystemZGenRegisterInfo { 36private: 37 SystemZTargetMachine &TM; 38 39public: 40 SystemZRegisterInfo(SystemZTargetMachine &tm); 41 42 // Override TargetRegisterInfo.h. 43 bool requiresRegisterScavenging(const MachineFunction &MF) const override { 44 return true; 45 } 46 bool requiresFrameIndexScavenging(const MachineFunction &MF) const override { 47 return true; 48 } 49 bool trackLivenessAfterRegAlloc(const MachineFunction &MF) const override { 50 return true; 51 } 52 const MCPhysReg *getCalleeSavedRegs(const MachineFunction *MF = nullptr) const 53 override; 54 BitVector getReservedRegs(const MachineFunction &MF) const override; 55 void eliminateFrameIndex(MachineBasicBlock::iterator MI, 56 int SPAdj, unsigned FIOperandNum, 57 RegScavenger *RS) const override; 58 unsigned getFrameRegister(const MachineFunction &MF) const override; 59}; 60 61} // end namespace llvm 62 63#endif 64