46 lines · cpp
1//===-- BPFCallLowering.cpp - Call lowering for GlobalISel ------*- 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-exception6//7//===----------------------------------------------------------------------===//8///9/// \file10/// This file implements the lowering of LLVM calls to machine code calls for11/// GlobalISel.12///13//===----------------------------------------------------------------------===//14 15#include "BPFCallLowering.h"16#include "llvm/CodeGen/GlobalISel/MachineIRBuilder.h"17 18#define DEBUG_TYPE "bpf-call-lowering"19 20using namespace llvm;21 22BPFCallLowering::BPFCallLowering(const BPFTargetLowering &TLI)23 : CallLowering(&TLI) {}24 25bool BPFCallLowering::lowerReturn(MachineIRBuilder &MIRBuilder,26 const Value *Val, ArrayRef<Register> VRegs,27 FunctionLoweringInfo &FLI,28 Register SwiftErrorVReg) const {29 if (!VRegs.empty())30 return false;31 MIRBuilder.buildInstr(BPF::RET);32 return true;33}34 35bool BPFCallLowering::lowerFormalArguments(MachineIRBuilder &MIRBuilder,36 const Function &F,37 ArrayRef<ArrayRef<Register>> VRegs,38 FunctionLoweringInfo &FLI) const {39 return VRegs.empty();40}41 42bool BPFCallLowering::lowerCall(MachineIRBuilder &MIRBuilder,43 CallLoweringInfo &Info) const {44 return false;45}46