llvm/lib/Target/AVR/AVRTargetMachine.h

   1 //===-- AVRTargetMachine.h - Define TargetMachine for 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 TargetMachine.
  10 //
  11 //===----------------------------------------------------------------------===//
  12
  13 #ifndef LLVM_AVR_TARGET_MACHINE_H
  14 #define LLVM_AVR_TARGET_MACHINE_H
  15
  16 #include "llvm/IR/DataLayout.h"
  17 #include "llvm/Target/TargetMachine.h"
  18
  19 #include "AVRFrameLowering.h"
  20 #include "AVRISelLowering.h"
  21 #include "AVRInstrInfo.h"
  22 #include "AVRSelectionDAGInfo.h"
  23 #include "AVRSubtarget.h"
  24
  25 #include <optional>
  26
  27 namespace llvm {
  28
  29 /// A generic AVR implementation.
  30 class AVRTargetMachine : public LLVMTargetMachine {
  31 public:
  32   AVRTargetMachine(const Target &T, const Triple &TT, StringRef CPU,
  33                    StringRef FS, const TargetOptions &Options,
  34                    std::optional<Reloc::Model> RM,
  35                    std::optional<CodeModel::Model> CM, CodeGenOptLevel OL,
  36                    bool JIT);
  37
  38   const AVRSubtarget *getSubtargetImpl() const;
  39   const AVRSubtarget *getSubtargetImpl(const Function &) const override;
  40
  41   TargetLoweringObjectFile *getObjFileLowering() const override {
  42     return this->TLOF.get();
  43   }
  44
  45   TargetPassConfig *createPassConfig(PassManagerBase &PM) override;
  46
  47   MachineFunctionInfo *
  48   createMachineFunctionInfo(BumpPtrAllocator &Allocator, const Function &F,
  49                             const TargetSubtargetInfo *STI) const override;
  50
  51   bool isNoopAddrSpaceCast(unsigned SrcAs, unsigned DestAs) const override {
  52     // While AVR has different address spaces, they are all represented by
  53     // 16-bit pointers that can be freely casted between (of course, a pointer
  54     // must be cast back to its original address space to be dereferenceable).
  55     // To be safe, also check the pointer size in case we implement __memx
  56     // pointers.
  57     return getPointerSize(SrcAs) == getPointerSize(DestAs);
  58   }
  59
  60 private:
  61   std::unique_ptr<TargetLoweringObjectFile> TLOF;
  62   AVRSubtarget SubTarget;
  63 };
  64
  65 } // end namespace llvm
  66
  67 #endif // LLVM_AVR_TARGET_MACHINE_H