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_32bit : subreg_high; 26 } 27 inline unsigned odd128(bool Is32bit) { 28 return Is32bit ? subreg_low32 : subreg_low; 29 } 30 } 31 32 class SystemZSubtarget; 33 class SystemZInstrInfo; 34 35 struct SystemZRegisterInfo : public SystemZGenRegisterInfo { 36 private: 37 SystemZTargetMachine &TM; 38 39 public: 40 SystemZRegisterInfo(SystemZTargetMachine &tm); 41 42 // Override TargetRegisterInfo.h. 43 virtual bool requiresRegisterScavenging(const MachineFunction &MF) const 44 LLVM_OVERRIDE { 45 return true; 46 } 47 virtual bool requiresFrameIndexScavenging(const MachineFunction &MF) const 48 LLVM_OVERRIDE { 49 return true; 50 } 51 virtual const uint16_t *getCalleeSavedRegs(const MachineFunction *MF = 0) 52 const LLVM_OVERRIDE; 53 virtual BitVector getReservedRegs(const MachineFunction &MF) 54 const LLVM_OVERRIDE; 55 virtual void eliminateFrameIndex(MachineBasicBlock::iterator MI, 56 int SPAdj, unsigned FIOperandNum, 57 RegScavenger *RS) const LLVM_OVERRIDE; 58 virtual unsigned getFrameRegister(const MachineFunction &MF) const 59 LLVM_OVERRIDE; 60 }; 61 62 } // end namespace llvm 63 64 #endif 65
