| //==- HexagonRegisterInfo.h - Hexagon Register Information Impl --*- C++ -*-==// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is distributed under the University of Illinois Open Source |
| // License. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| // |
| // This file contains the Hexagon implementation of the TargetRegisterInfo |
| // class. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #ifndef HexagonREGISTERINFO_H |
| #define HexagonREGISTERINFO_H |
| |
| #include "llvm/MC/MachineLocation.h" |
| #include "llvm/Target/TargetRegisterInfo.h" |
| |
| #define GET_REGINFO_HEADER |
| #include "HexagonGenRegisterInfo.inc" |
| |
| // |
| // We try not to hard code the reserved registers in our code, |
| // so the following two macros were defined. However, there |
| // are still a few places that R11 and R10 are hard wired. |
| // See below. If, in the future, we decided to change the reserved |
| // register. Don't forget changing the following places. |
| // |
| // 1. the "Defs" set of STriw_pred in HexagonInstrInfo.td |
| // 2. the "Defs" set of LDri_pred in HexagonInstrInfo.td |
| // 3. the definition of "IntRegs" in HexagonRegisterInfo.td |
| // 4. the definition of "DoubleRegs" in HexagonRegisterInfo.td |
| // |
| #define HEXAGON_RESERVED_REG_1 Hexagon::R10 |
| #define HEXAGON_RESERVED_REG_2 Hexagon::R11 |
| |
| namespace llvm { |
| |
| class HexagonSubtarget; |
| class HexagonInstrInfo; |
| class Type; |
| |
| struct HexagonRegisterInfo : public HexagonGenRegisterInfo { |
| HexagonSubtarget &Subtarget; |
| const HexagonInstrInfo &TII; |
| |
| HexagonRegisterInfo(HexagonSubtarget &st, const HexagonInstrInfo &tii); |
| |
| /// Code Generation virtual methods... |
| const uint16_t *getCalleeSavedRegs(const MachineFunction *MF = 0) const; |
| |
| const TargetRegisterClass* const* getCalleeSavedRegClasses( |
| const MachineFunction *MF = 0) const; |
| |
| BitVector getReservedRegs(const MachineFunction &MF) const; |
| |
| void eliminateFrameIndex(MachineBasicBlock::iterator II, |
| int SPAdj, unsigned FIOperandNum, |
| RegScavenger *RS = NULL) const; |
| |
| /// determineFrameLayout - Determine the size of the frame and maximum call |
| /// frame size. |
| void determineFrameLayout(MachineFunction &MF) const; |
| |
| /// requiresRegisterScavenging - returns true since we may need scavenging for |
| /// a temporary register when generating hardware loop instructions. |
| bool requiresRegisterScavenging(const MachineFunction &MF) const { |
| return true; |
| } |
| |
| bool trackLivenessAfterRegAlloc(const MachineFunction &MF) const { |
| return true; |
| } |
| |
| // Debug information queries. |
| unsigned getRARegister() const; |
| unsigned getFrameRegister(const MachineFunction &MF) const; |
| unsigned getFrameRegister() const; |
| void getInitialFrameState(std::vector<MachineMove> &Moves) const; |
| unsigned getStackRegister() const; |
| |
| // Exception handling queries. |
| unsigned getEHExceptionRegister() const; |
| unsigned getEHHandlerRegister() const; |
| }; |
| |
| } // end namespace llvm |
| |
| #endif |