1 //===-- SystemZRegisterInfo.h - SystemZ register information ----*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 #ifndef SystemZREGISTERINFO_H
11 #define SystemZREGISTERINFO_H
14 #include "llvm/Target/TargetRegisterInfo.h"
16 #define GET_REGINFO_HEADER
17 #include "SystemZGenRegisterInfo.inc"
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;
27 inline unsigned odd128(bool Is32bit) {
28 return Is32bit ? subreg_low32 : subreg_low;
32 class SystemZSubtarget;
33 class SystemZInstrInfo;
35 struct SystemZRegisterInfo : public SystemZGenRegisterInfo {
37 SystemZTargetMachine &TM;
38 const SystemZInstrInfo &TII;
41 SystemZRegisterInfo(SystemZTargetMachine &tm, const SystemZInstrInfo &tii);
43 // Override TargetRegisterInfo.h.
44 virtual bool requiresRegisterScavenging(const MachineFunction &MF) const
48 virtual bool requiresFrameIndexScavenging(const MachineFunction &MF) const
52 virtual const uint16_t *getCalleeSavedRegs(const MachineFunction *MF = 0)
54 virtual BitVector getReservedRegs(const MachineFunction &MF)
56 virtual bool saveScavengerRegister(MachineBasicBlock &MBB,
57 MachineBasicBlock::iterator SaveMBBI,
58 MachineBasicBlock::iterator &UseMBBI,
59 const TargetRegisterClass *RC,
60 unsigned Reg) const LLVM_OVERRIDE;
61 virtual void eliminateFrameIndex(MachineBasicBlock::iterator MI,
62 int SPAdj, unsigned FIOperandNum,
63 RegScavenger *RS) const LLVM_OVERRIDE;
64 virtual unsigned getFrameRegister(const MachineFunction &MF) const
68 } // end namespace llvm