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 lowerFormalArguments(MachineIRBuilder &MIRBuilder, const Function &F,
36 ArrayRef<ArrayRef<Register>> VRegs,
37 FunctionLoweringInfo &FLI) const override;
38
39 bool lowerCall(MachineIRBuilder &MIRBuilder,
40 CallLoweringInfo &Info) const override;
41
42private:
43 bool lowerReturnVal(MachineIRBuilder &MIRBuilder, const Value *Val,
44 ArrayRef<Register> VRegs, MachineInstrBuilder &Ret) const;
45
46 void saveVarArgRegisters(MachineIRBuilder &MIRBuilder,
47 CallLowering::IncomingValueHandler &Handler,
48 IncomingValueAssigner &Assigner,
49 CCState &CCInfo) const;
50};
51
52} // end namespace llvm
53
54#endif // LLVM_LIB_TARGET_RISCV_RISCVCALLLOWERING_H
55