HexagonRegisterInfo.h revision dce4a407a24b04eebc6a376f8e62b41aaa7b071f
1//==- HexagonRegisterInfo.h - Hexagon Register Information Impl --*- 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// This file contains the Hexagon implementation of the TargetRegisterInfo 11// class. 12// 13//===----------------------------------------------------------------------===// 14 15#ifndef HexagonREGISTERINFO_H 16#define HexagonREGISTERINFO_H 17 18#include "llvm/MC/MachineLocation.h" 19#include "llvm/Target/TargetRegisterInfo.h" 20 21#define GET_REGINFO_HEADER 22#include "HexagonGenRegisterInfo.inc" 23 24// 25// We try not to hard code the reserved registers in our code, 26// so the following two macros were defined. However, there 27// are still a few places that R11 and R10 are hard wired. 28// See below. If, in the future, we decided to change the reserved 29// register. Don't forget changing the following places. 30// 31// 1. the "Defs" set of STriw_pred in HexagonInstrInfo.td 32// 2. the "Defs" set of LDri_pred in HexagonInstrInfo.td 33// 3. the definition of "IntRegs" in HexagonRegisterInfo.td 34// 4. the definition of "DoubleRegs" in HexagonRegisterInfo.td 35// 36#define HEXAGON_RESERVED_REG_1 Hexagon::R10 37#define HEXAGON_RESERVED_REG_2 Hexagon::R11 38 39namespace llvm { 40 41class HexagonSubtarget; 42class HexagonInstrInfo; 43class Type; 44 45struct HexagonRegisterInfo : public HexagonGenRegisterInfo { 46 HexagonSubtarget &Subtarget; 47 48 HexagonRegisterInfo(HexagonSubtarget &st); 49 50 /// Code Generation virtual methods... 51 const MCPhysReg * 52 getCalleeSavedRegs(const MachineFunction *MF = nullptr) const override; 53 54 const TargetRegisterClass* const* 55 getCalleeSavedRegClasses(const MachineFunction *MF = nullptr) const; 56 57 BitVector getReservedRegs(const MachineFunction &MF) const override; 58 59 void eliminateFrameIndex(MachineBasicBlock::iterator II, 60 int SPAdj, unsigned FIOperandNum, 61 RegScavenger *RS = nullptr) const override; 62 63 /// determineFrameLayout - Determine the size of the frame and maximum call 64 /// frame size. 65 void determineFrameLayout(MachineFunction &MF) const; 66 67 /// requiresRegisterScavenging - returns true since we may need scavenging for 68 /// a temporary register when generating hardware loop instructions. 69 bool requiresRegisterScavenging(const MachineFunction &MF) const override { 70 return true; 71 } 72 73 bool trackLivenessAfterRegAlloc(const MachineFunction &MF) const override { 74 return true; 75 } 76 77 // Debug information queries. 78 unsigned getRARegister() const; 79 unsigned getFrameRegister(const MachineFunction &MF) const override; 80 unsigned getFrameRegister() const; 81 unsigned getStackRegister() const; 82}; 83 84} // end namespace llvm 85 86#endif 87