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1//===-- AVRSubtarget.h - Define Subtarget for the AVR -----------*- C++ -*-===//2//3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.4// See https://llvm.org/LICENSE.txt for license information.5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception6//7//===----------------------------------------------------------------------===//8//9// This file declares the AVR specific subclass of TargetSubtargetInfo.10//11//===----------------------------------------------------------------------===//12 13#ifndef LLVM_AVR_SUBTARGET_H14#define LLVM_AVR_SUBTARGET_H15 16#include "llvm/CodeGen/TargetSubtargetInfo.h"17#include "llvm/IR/DataLayout.h"18#include "llvm/Target/TargetMachine.h"19 20#include "AVRFrameLowering.h"21#include "AVRISelLowering.h"22#include "AVRInstrInfo.h"23#include "AVRSelectionDAGInfo.h"24#include "MCTargetDesc/AVRMCTargetDesc.h"25 26#define GET_SUBTARGETINFO_HEADER27#include "AVRGenSubtargetInfo.inc"28 29namespace llvm {30 31/// A specific AVR target MCU.32class AVRSubtarget : public AVRGenSubtargetInfo {33public:34 //! Creates an AVR subtarget.35 //! \param TT The target triple.36 //! \param CPU The CPU to target.37 //! \param FS The feature string.38 //! \param TM The target machine.39 AVRSubtarget(const Triple &TT, const std::string &CPU, const std::string &FS,40 const AVRTargetMachine &TM);41 42 const AVRInstrInfo *getInstrInfo() const override { return &InstrInfo; }43 const TargetFrameLowering *getFrameLowering() const override {44 return &FrameLowering;45 }46 const AVRTargetLowering *getTargetLowering() const override {47 return &TLInfo;48 }49 const AVRSelectionDAGInfo *getSelectionDAGInfo() const override {50 return &TSInfo;51 }52 const AVRRegisterInfo *getRegisterInfo() const override {53 return &InstrInfo.getRegisterInfo();54 }55 56 /// Parses a subtarget feature string, setting appropriate options.57 /// \note Definition of function is auto generated by `tblgen`.58 void ParseSubtargetFeatures(StringRef CPU, StringRef TuneCPU, StringRef FS);59 60 AVRSubtarget &initializeSubtargetDependencies(StringRef CPU, StringRef FS,61 const TargetMachine &TM);62 63 // Subtarget feature getters.64#define GET_SUBTARGETINFO_MACRO(ATTRIBUTE, DEFAULT, GETTER) \65 bool GETTER() const { return ATTRIBUTE; }66#include "AVRGenSubtargetInfo.inc"67 68 uint8_t getIORegisterOffset() const { return hasMemMappedGPR() ? 0x20 : 0x0; }69 70 bool enableSubRegLiveness() const override { return true; }71 72 /// Gets the ELF architecture for the e_flags field73 /// of an ELF object file.74 unsigned getELFArch() const {75 assert(ELFArch != 0 &&76 "every device must have an associate ELF architecture");77 return ELFArch;78 }79 80 /// Get I/O register addresses.81 int getIORegRAMPZ() const { return hasELPM() ? 0x3b : -1; }82 int getIORegEIND() const { return hasEIJMPCALL() ? 0x3c : -1; }83 int getIORegSPL() const { return 0x3d; }84 int getIORegSPH() const { return hasSmallStack() ? -1 : 0x3e; }85 int getIORegSREG() const { return 0x3f; }86 87 /// Get GPR aliases.88 int getRegTmpIndex() const { return hasTinyEncoding() ? 16 : 0; }89 int getRegZeroIndex() const { return hasTinyEncoding() ? 17 : 1; }90 91 Register getTmpRegister() const {92 return hasTinyEncoding() ? AVR::R16 : AVR::R0;93 }94 Register getZeroRegister() const {95 return hasTinyEncoding() ? AVR::R17 : AVR::R1;96 }97 98private:99 /// The ELF e_flags architecture.100 unsigned ELFArch = 0;101 102 // Subtarget feature settings103#define GET_SUBTARGETINFO_MACRO(ATTRIBUTE, DEFAULT, GETTER) \104 bool ATTRIBUTE = DEFAULT;105#include "AVRGenSubtargetInfo.inc"106 107 AVRInstrInfo InstrInfo;108 AVRFrameLowering FrameLowering;109 AVRTargetLowering TLInfo;110 AVRSelectionDAGInfo TSInfo;111};112 113} // end namespace llvm114 115#endif // LLVM_AVR_SUBTARGET_H116