1 //===-- RISCVCallLowering.cpp - 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 implements the lowering of LLVM calls to machine code calls for 11 /// GlobalISel. 12 // 13 //===----------------------------------------------------------------------===// 14 15 #include "RISCVCallLowering.h" 16 #include "RISCVISelLowering.h" 17 #include "llvm/CodeGen/GlobalISel/MachineIRBuilder.h" 18 19 using namespace llvm; 20 21 RISCVCallLowering::RISCVCallLowering(const RISCVTargetLowering &TLI) 22 : CallLowering(&TLI) {} 23 24 bool RISCVCallLowering::lowerReturn(MachineIRBuilder &MIRBuilder, 25 const Value *Val, ArrayRef<Register> VRegs, 26 FunctionLoweringInfo &FLI) const { 27 28 MachineInstrBuilder Ret = MIRBuilder.buildInstrNoInsert(RISCV::PseudoRET); 29 30 if (Val != nullptr) { 31 return false; 32 } 33 MIRBuilder.insertInstr(Ret); 34 return true; 35 } 36 37 bool RISCVCallLowering::lowerFormalArguments(MachineIRBuilder &MIRBuilder, 38 const Function &F, 39 ArrayRef<ArrayRef<Register>> VRegs, 40 FunctionLoweringInfo &FLI) const { 41 42 if (F.arg_empty()) 43 return true; 44 45 return false; 46 } 47 48 bool RISCVCallLowering::lowerCall(MachineIRBuilder &MIRBuilder, 49 CallLoweringInfo &Info) const { 50 return false; 51 } 52