llvm/lib/Target/AVR/AVRSubtarget.h

   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-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8 //
   9 // This file declares the AVR specific subclass of TargetSubtargetInfo.
  10 //
  11 //===----------------------------------------------------------------------===//
  12
  13 #ifndef LLVM_AVR_SUBTARGET_H
  14 #define LLVM_AVR_SUBTARGET_H
  15
  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_HEADER
  27 #include "AVRGenSubtargetInfo.inc"
  28
  29 namespace llvm {
  30
  31 /// A specific AVR target MCU.
  32 class AVRSubtarget : public AVRGenSubtargetInfo {
  33 public:
  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 field
  73   /// 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
  98 private:
  99   /// The ELF e_flags architecture.
 100   unsigned ELFArch = 0;
 101
 102   // Subtarget feature settings
 103 #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 llvm
 114
 115 #endif // LLVM_AVR_SUBTARGET_H