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, CodeGenOpt::Level 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
68