1//===-- RISCVCallLowering.h - Call lowering ---------------------*- C++ -*-===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8//
9/// \file
10/// This file describes how to lower LLVM calls to machine code calls.
11//
12//===----------------------------------------------------------------------===//
13
14#ifndef LLVM_LIB_TARGET_RISCV_RISCVCALLLOWERING_H
15#define LLVM_LIB_TARGET_RISCV_RISCVCALLLOWERING_H
16
17#include "llvm/CodeGen/CallingConvLower.h"
18#include "llvm/CodeGen/GlobalISel/CallLowering.h"
19
20namespace llvm {
21
22class MachineInstrBuilder;
23class MachineIRBuilder;
24class RISCVTargetLowering;
25
26class RISCVCallLowering : public CallLowering {
27
28public:
29 RISCVCallLowering(const RISCVTargetLowering &TLI);
30
31 bool lowerReturn(MachineIRBuilder &MIRBuiler, const Value *Val,
32 ArrayRef<Register> VRegs,
33 FunctionLoweringInfo &FLI) const override;
34
35 bool canLowerReturn(MachineFunction &MF, CallingConv::ID CallConv,
36 SmallVectorImpl<BaseArgInfo> &Outs,
37 bool IsVarArg) const override;
38
39 bool lowerFormalArguments(MachineIRBuilder &MIRBuilder, const Function &F,
40 ArrayRef<ArrayRef<Register>> VRegs,
41 FunctionLoweringInfo &FLI) const override;
42
43 bool lowerCall(MachineIRBuilder &MIRBuilder,
44 CallLoweringInfo &Info) const override;
45
46private:
47 void saveVarArgRegisters(MachineIRBuilder &MIRBuilder,
48 CallLowering::IncomingValueHandler &Handler,
49 IncomingValueAssigner &Assigner,
50 CCState &CCInfo) const;
51};
52
53} // end namespace llvm
54
55#endif // LLVM_LIB_TARGET_RISCV_RISCVCALLLOWERING_H
56