115 lines
3.7 KiB
C++
115 lines
3.7 KiB
C++
//===-- AVRSubtarget.h - Define Subtarget for the AVR -----------*- C++ -*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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//
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// This file declares the AVR specific subclass of TargetSubtargetInfo.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_AVR_SUBTARGET_H
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#define LLVM_AVR_SUBTARGET_H
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#include "llvm/CodeGen/TargetSubtargetInfo.h"
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#include "llvm/IR/DataLayout.h"
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#include "llvm/Target/TargetMachine.h"
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#include "AVRFrameLowering.h"
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#include "AVRISelLowering.h"
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#include "AVRInstrInfo.h"
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#include "AVRSelectionDAGInfo.h"
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#include "MCTargetDesc/AVRMCTargetDesc.h"
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#define GET_SUBTARGETINFO_HEADER
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#include "AVRGenSubtargetInfo.inc"
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namespace llvm {
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/// A specific AVR target MCU.
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class AVRSubtarget : public AVRGenSubtargetInfo {
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public:
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//! Creates an AVR subtarget.
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//! \param TT The target triple.
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//! \param CPU The CPU to target.
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//! \param FS The feature string.
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//! \param TM The target machine.
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AVRSubtarget(const Triple &TT, const std::string &CPU, const std::string &FS,
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const AVRTargetMachine &TM);
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const AVRInstrInfo *getInstrInfo() const override { return &InstrInfo; }
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const TargetFrameLowering *getFrameLowering() const override {
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return &FrameLowering;
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}
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const AVRTargetLowering *getTargetLowering() const override {
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return &TLInfo;
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}
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const AVRSelectionDAGInfo *getSelectionDAGInfo() const override {
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return &TSInfo;
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}
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const AVRRegisterInfo *getRegisterInfo() const override {
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return &InstrInfo.getRegisterInfo();
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}
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/// Parses a subtarget feature string, setting appropriate options.
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/// \note Definition of function is auto generated by `tblgen`.
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void ParseSubtargetFeatures(StringRef CPU, StringRef TuneCPU, StringRef FS);
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AVRSubtarget &initializeSubtargetDependencies(StringRef CPU, StringRef FS,
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const TargetMachine &TM);
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// Subtarget feature getters.
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#define GET_SUBTARGETINFO_MACRO(ATTRIBUTE, DEFAULT, GETTER) \
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bool GETTER() const { return ATTRIBUTE; }
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#include "AVRGenSubtargetInfo.inc"
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uint8_t getIORegisterOffset() const { return hasMemMappedGPR() ? 0x20 : 0x0; }
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bool enableSubRegLiveness() const override { return true; }
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/// Gets the ELF architecture for the e_flags field
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/// of an ELF object file.
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unsigned getELFArch() const {
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assert(ELFArch != 0 &&
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"every device must have an associate ELF architecture");
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return ELFArch;
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}
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/// Get I/O register addresses.
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int getIORegRAMPZ() const { return hasELPM() ? 0x3b : -1; }
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int getIORegEIND() const { return hasEIJMPCALL() ? 0x3c : -1; }
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int getIORegSPL() const { return 0x3d; }
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int getIORegSPH() const { return hasSmallStack() ? -1 : 0x3e; }
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int getIORegSREG() const { return 0x3f; }
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/// Get GPR aliases.
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int getRegTmpIndex() const { return hasTinyEncoding() ? 16 : 0; }
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int getRegZeroIndex() const { return hasTinyEncoding() ? 17 : 1; }
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Register getTmpRegister() const {
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return hasTinyEncoding() ? AVR::R16 : AVR::R0;
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}
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Register getZeroRegister() const {
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return hasTinyEncoding() ? AVR::R17 : AVR::R1;
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}
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private:
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/// The ELF e_flags architecture.
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unsigned ELFArch = 0;
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// Subtarget feature settings
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#define GET_SUBTARGETINFO_MACRO(ATTRIBUTE, DEFAULT, GETTER) \
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bool ATTRIBUTE = DEFAULT;
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#include "AVRGenSubtargetInfo.inc"
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AVRInstrInfo InstrInfo;
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AVRFrameLowering FrameLowering;
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AVRTargetLowering TLInfo;
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AVRSelectionDAGInfo TSInfo;
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};
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} // end namespace llvm
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#endif // LLVM_AVR_SUBTARGET_H
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