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 LLVM_LIB_TARGET_SYSTEMZ_SYSTEMZREGISTERINFO_H 11 #define LLVM_LIB_TARGET_SYSTEMZ_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. even128(bool Is32bit)24inline unsigned even128(bool Is32bit) { 25 return Is32bit ? subreg_hl32 : subreg_h64; 26 } odd128(bool Is32bit)27inline 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 /// getPointerRegClass - Return the register class to use to hold pointers. 37 /// This is currently only used by LOAD_STACK_GUARD, which requires a non-%r0 38 /// register, hence ADDR64. 39 const TargetRegisterClass * 40 getPointerRegClass(const MachineFunction &MF, 41 unsigned Kind=0) const override { 42 return &SystemZ::ADDR64BitRegClass; 43 } 44 45 // Override TargetRegisterInfo.h. requiresRegisterScavengingSystemZRegisterInfo46 bool requiresRegisterScavenging(const MachineFunction &MF) const override { 47 return true; 48 } requiresFrameIndexScavengingSystemZRegisterInfo49 bool requiresFrameIndexScavenging(const MachineFunction &MF) const override { 50 return true; 51 } trackLivenessAfterRegAllocSystemZRegisterInfo52 bool trackLivenessAfterRegAlloc(const MachineFunction &MF) const override { 53 return true; 54 } 55 const MCPhysReg *getCalleeSavedRegs(const MachineFunction *MF) const override; 56 const uint32_t *getCallPreservedMask(const MachineFunction &MF, 57 CallingConv::ID CC) const override; 58 BitVector getReservedRegs(const MachineFunction &MF) const override; 59 void eliminateFrameIndex(MachineBasicBlock::iterator MI, 60 int SPAdj, unsigned FIOperandNum, 61 RegScavenger *RS) const override; 62 unsigned getFrameRegister(const MachineFunction &MF) const override; 63 }; 64 65 } // end namespace llvm 66 67 #endif 68