CSKYTargetMachine.h

//===--- CSKYTargetMachine.h - Define TargetMachine for CSKY ----*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// This file declares the CSKY specific subclass of TargetMachine.
//
//===----------------------------------------------------------------------===//

#ifndef LLVM_LIB_TARGET_CSKY_CSKYTARGETMACHINE_H
#define LLVM_LIB_TARGET_CSKY_CSKYTARGETMACHINE_H

#include "CSKYSubtarget.h"
#include "llvm/IR/DataLayout.h"
#include "llvm/Target/TargetMachine.h"
#include <optional>

namespace llvm {

class CSKYTargetMachine : public LLVMTargetMachine {
  std::unique_ptr<TargetLoweringObjectFile> TLOF;
  mutable StringMap<std::unique_ptr<CSKYSubtarget>> SubtargetMap;

public:
  CSKYTargetMachine(const Target &T, const Triple &TT, StringRef CPU,
                    StringRef FS, const TargetOptions &Options,
                    std::optional<Reloc::Model> RM,
                    std::optional<CodeModel::Model> CM, CodeGenOptLevel OL,
                    bool JIT);

  TargetPassConfig *createPassConfig(PassManagerBase &PM) override;

  const CSKYSubtarget *getSubtargetImpl(const Function &F) const override;
  // DO NOT IMPLEMENT: There is no such thing as a valid default subtarget,
  // subtargets are per-function entities based on the target-specific
  // attributes of each function.
  const CSKYSubtarget *getSubtargetImpl() const = delete;

  TargetLoweringObjectFile *getObjFileLowering() const override {
    return TLOF.get();
  }

  MachineFunctionInfo *
  createMachineFunctionInfo(BumpPtrAllocator &Allocator, const Function &F,
                            const TargetSubtargetInfo *STI) const override;
};
} // namespace llvm

#endif