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 39 namespace llvm { 40 41 class HexagonSubtarget; 42 class HexagonInstrInfo; 43 class Type; 44 45 struct 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
