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 20 namespace llvm { 21 22 class MachineInstrBuilder; 23 class MachineIRBuilder; 24 class RISCVTargetLowering; 25 26 class RISCVCallLowering : public CallLowering { 27 28 public: 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 46 private: 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