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//===-- llvm/lib/Target/ARM/ARMCallLowering.h - Call lowering -------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
///
/// \file
/// This file describes how to lower LLVM calls to machine code calls.
///
//===----------------------------------------------------------------------===//
#ifndef LLVM_LIB_TARGET_ARM_ARMCALLLOWERING
#define LLVM_LIB_TARGET_ARM_ARMCALLLOWERING
#include "llvm/CodeGen/CallingConvLower.h"
#include "llvm/CodeGen/GlobalISel/CallLowering.h"
#include "llvm/CodeGen/ValueTypes.h"
namespace llvm {
class ARMTargetLowering;
class MachineInstrBuilder;
class ARMCallLowering : public CallLowering {
public:
ARMCallLowering(const ARMTargetLowering &TLI);
bool lowerReturn(MachineIRBuilder &MIRBuiler, const Value *Val,
unsigned VReg) 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,
unsigned VReg, MachineInstrBuilder &Ret) const;
typedef std::function<void(unsigned Reg, uint64_t Offset)> SplitArgTy;
/// 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 of namespace llvm
#endif
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