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//===- llvm/lib/Target/ARM/ARMCallLowering.h - Call lowering ----*- 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
/// \file
/// This file describes how to lower LLVM calls to machine code calls.


#include "llvm/ADT/ArrayRef.h"
#include "llvm/CodeGen/GlobalISel/CallLowering.h"
#include "llvm/IR/CallingConv.h"
#include <cstdint>
#include <functional>

namespace llvm {

class ARMTargetLowering;
class MachineFunction;
class MachineInstrBuilder;
class MachineIRBuilder;
class Value;

class ARMCallLowering : public CallLowering {
  ARMCallLowering(const ARMTargetLowering &TLI);

  bool lowerReturn(MachineIRBuilder &MIRBuilder, const Value *Val,
                   ArrayRef<Register> VRegs) const override;

  bool lowerFormalArguments(MachineIRBuilder &MIRBuilder, const Function &F,
                            ArrayRef<ArrayRef<Register>> VRegs) const override;

  bool lowerCall(MachineIRBuilder &MIRBuilder, CallingConv::ID CallConv,
                 const MachineOperand &Callee, const ArgInfo &OrigRet,
                 ArrayRef<ArgInfo> OrigArgs) const override;

  bool lowerReturnVal(MachineIRBuilder &MIRBuilder, const Value *Val,
                      ArrayRef<Register> VRegs,
                      MachineInstrBuilder &Ret) const;

  /// Split an argument into one or more arguments that the CC lowering can cope
  /// with.
  void splitToValueTypes(const ArgInfo &OrigArg,
                         SmallVectorImpl<ArgInfo> &SplitArgs,
                         MachineFunction &MF) const;

} // end namespace llvm