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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.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_LIB_TARGET_ARM_ARMCALLLOWERING_H
#define LLVM_LIB_TARGET_ARM_ARMCALLLOWERING_H
#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 {
public:
ARMCallLowering(const ARMTargetLowering &TLI);
bool lowerReturn(MachineIRBuilder &MIRBuilder, const Value *Val,
ArrayRef<unsigned> VRegs) const override;
bool lowerFormalArguments(MachineIRBuilder &MIRBuilder, const Function &F,
ArrayRef<unsigned> VRegs) const override;
bool lowerCall(MachineIRBuilder &MIRBuilder, CallingConv::ID CallConv,
const MachineOperand &Callee, const ArgInfo &OrigRet,
ArrayRef<ArgInfo> OrigArgs) const override;
private:
bool lowerReturnVal(MachineIRBuilder &MIRBuilder, const Value *Val,
ArrayRef<unsigned> VRegs,
MachineInstrBuilder &Ret) const;
using SplitArgTy = std::function<void(unsigned Reg, uint64_t Offset)>;
/// Split an argument into one or more arguments that the CC lowering can cope
/// with (e.g. replace pointers with integers).
void splitToValueTypes(const ArgInfo &OrigArg,
SmallVectorImpl<ArgInfo> &SplitArgs,
MachineFunction &MF,
const SplitArgTy &PerformArgSplit) const;
};
} // end namespace llvm
#endif // LLVM_LIB_TARGET_ARM_ARMCALLLOWERING_H
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