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 LLVM_LIB_TARGET_SYSTEMZ_SYSTEMZREGISTERINFO_H
11 #define LLVM_LIB_TARGET_SYSTEMZ_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_hl32 : subreg_h64;
27 inline unsigned odd128(bool Is32bit) {
28 return Is32bit ? subreg_l32 : subreg_l64;
30 } // end namespace SystemZ
32 struct SystemZRegisterInfo : public SystemZGenRegisterInfo {
34 SystemZRegisterInfo();
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;
45 // Override TargetRegisterInfo.h.
46 bool requiresRegisterScavenging(const MachineFunction &MF) const override {
49 bool requiresFrameIndexScavenging(const MachineFunction &MF) const override {
52 bool trackLivenessAfterRegAlloc(const MachineFunction &MF) const override {
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;
65 } // end namespace llvm