1 //==- AArch64RegisterInfo.h - AArch64 Register Information Impl -*- 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 // This file contains the AArch64 implementation of the MCRegisterInfo class.
12 //===----------------------------------------------------------------------===//
14 #ifndef LLVM_TARGET_AARCH64REGISTERINFO_H
15 #define LLVM_TARGET_AARCH64REGISTERINFO_H
17 #include "llvm/Target/TargetRegisterInfo.h"
19 #define GET_REGINFO_HEADER
20 #include "AArch64GenRegisterInfo.inc"
24 class AArch64InstrInfo;
25 class AArch64Subtarget;
27 struct AArch64RegisterInfo : public AArch64GenRegisterInfo {
28 AArch64RegisterInfo();
30 const uint16_t *getCalleeSavedRegs(const MachineFunction *MF = 0) const;
31 const uint32_t *getCallPreservedMask(CallingConv::ID) const;
33 const uint32_t *getTLSDescCallPreservedMask() const;
35 BitVector getReservedRegs(const MachineFunction &MF) const;
36 unsigned getFrameRegister(const MachineFunction &MF) const;
38 void eliminateFrameIndex(MachineBasicBlock::iterator II, int SPAdj,
39 unsigned FIOperandNum,
40 RegScavenger *Rs = NULL) const;
42 /// getCrossCopyRegClass - Returns a legal register class to copy a register
43 /// in the specified class to or from. Returns original class if it is
44 /// possible to copy between a two registers of the specified class.
45 const TargetRegisterClass *
46 getCrossCopyRegClass(const TargetRegisterClass *RC) const;
48 /// getLargestLegalSuperClass - Returns the largest super class of RC that is
49 /// legal to use in the current sub-target and has the same spill size.
50 const TargetRegisterClass*
51 getLargestLegalSuperClass(const TargetRegisterClass *RC) const {
52 if (RC == &AArch64::tcGPR64RegClass)
53 return &AArch64::GPR64RegClass;
58 bool requiresRegisterScavenging(const MachineFunction &MF) const {
62 bool requiresFrameIndexScavenging(const MachineFunction &MF) const {
66 bool useFPForScavengingIndex(const MachineFunction &MF) const;
69 } // end namespace llvm
71 #endif // LLVM_TARGET_AARCH64REGISTERINFO_H