1 //==- HexagonRegisterInfo.h - Hexagon 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 Hexagon implementation of the TargetRegisterInfo
13 //===----------------------------------------------------------------------===//
15 #ifndef LLVM_LIB_TARGET_HEXAGON_HEXAGONREGISTERINFO_H
16 #define LLVM_LIB_TARGET_HEXAGON_HEXAGONREGISTERINFO_H
18 #include "llvm/MC/MachineLocation.h"
19 #include "llvm/Target/TargetRegisterInfo.h"
21 #define GET_REGINFO_HEADER
22 #include "HexagonGenRegisterInfo.inc"
27 // Generic (pseudo) subreg indices for use with getHexagonSubRegIndex.
28 enum { ps_sub_lo = 0, ps_sub_hi = 1 };
31 class HexagonRegisterInfo : public HexagonGenRegisterInfo {
33 HexagonRegisterInfo();
35 /// Code Generation virtual methods...
36 const MCPhysReg *getCalleeSavedRegs(const MachineFunction *MF)
40 BitVector getReservedRegs(const MachineFunction &MF) const override;
42 void eliminateFrameIndex(MachineBasicBlock::iterator II, int SPAdj,
43 unsigned FIOperandNum, RegScavenger *RS = nullptr) const override;
45 /// Returns true since we may need scavenging for a temporary register
46 /// when generating hardware loop instructions.
47 bool requiresRegisterScavenging(const MachineFunction &MF) const override {
51 /// Returns true. Spill code for predicate registers might need an extra
53 bool requiresFrameIndexScavenging(const MachineFunction &MF) const override {
57 /// Returns true if the frame pointer is valid.
58 bool useFPForScavengingIndex(const MachineFunction &MF) const override;
60 bool trackLivenessAfterRegAlloc(const MachineFunction &MF) const override {
64 // Debug information queries.
65 unsigned getRARegister() const;
66 unsigned getFrameRegister(const MachineFunction &MF) const override;
67 unsigned getFrameRegister() const;
68 unsigned getStackRegister() const;
70 unsigned getHexagonSubRegIndex(const TargetRegisterClass *RC,
71 unsigned GenIdx) const;
73 const MCPhysReg *getCallerSavedRegs(const MachineFunction *MF,
74 const TargetRegisterClass *RC) const;
76 unsigned getFirstCallerSavedNonParamReg() const;
78 bool isEHReturnCalleeSaveReg(unsigned Reg) const;
79 bool isCalleeSaveReg(unsigned Reg) const;
82 } // end namespace llvm