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 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 42 private: 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