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//===- lib/Target/AMDGPU/AMDGPUCallLowering.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_AMDGPU_AMDGPUCALLLOWERING_H
#define LLVM_LIB_TARGET_AMDGPU_AMDGPUCALLLOWERING_H
#include "AMDGPU.h"
#include "llvm/CodeGen/GlobalISel/CallLowering.h"
namespace llvm {
class AMDGPUTargetLowering;
class MachineInstrBuilder;
class AMDGPUCallLowering: public CallLowering {
Register lowerParameterPtr(MachineIRBuilder &B, Type *ParamTy,
uint64_t Offset) const;
void lowerParameter(MachineIRBuilder &B, Type *ParamTy, uint64_t Offset,
Align Alignment, Register DstReg) const;
/// A function of this type is used to perform value split action.
using SplitArgTy = std::function<void(ArrayRef<Register>, Register, LLT, LLT, int)>;
void splitToValueTypes(MachineIRBuilder &B,
const ArgInfo &OrigArgInfo,
unsigned OrigArgIdx,
SmallVectorImpl<ArgInfo> &SplitArgs,
const DataLayout &DL,
CallingConv::ID CallConv,
SplitArgTy SplitArg) const;
bool lowerReturnVal(MachineIRBuilder &B, const Value *Val,
ArrayRef<Register> VRegs, MachineInstrBuilder &Ret) const;
public:
AMDGPUCallLowering(const AMDGPUTargetLowering &TLI);
bool lowerReturn(MachineIRBuilder &B, const Value *Val,
ArrayRef<Register> VRegs) const override;
bool lowerFormalArgumentsKernel(MachineIRBuilder &B, const Function &F,
ArrayRef<ArrayRef<Register>> VRegs) const;
bool lowerFormalArguments(MachineIRBuilder &B, const Function &F,
ArrayRef<ArrayRef<Register>> VRegs) const override;
static CCAssignFn *CCAssignFnForCall(CallingConv::ID CC, bool IsVarArg);
static CCAssignFn *CCAssignFnForReturn(CallingConv::ID CC, bool IsVarArg);
};
} // End of namespace llvm;
#endif
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