RISCVCallLowering.cpp revision 360784 
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
19using namespace llvm;
20
21RISCVCallLowering::RISCVCallLowering(const RISCVTargetLowering &TLI)
22    : CallLowering(&TLI) {}
23
24bool RISCVCallLowering::lowerReturn(MachineIRBuilder &MIRBuilder,
25                                    const Value *Val,
26                                    ArrayRef<Register> VRegs) 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
37bool RISCVCallLowering::lowerFormalArguments(
38    MachineIRBuilder &MIRBuilder, const Function &F,
39    ArrayRef<ArrayRef<Register>> VRegs) const {
40
41  if (F.arg_empty())
42    return true;
43
44  return false;
45}
46
47bool RISCVCallLowering::lowerCall(MachineIRBuilder &MIRBuilder,
48                                  CallLoweringInfo &Info) const {
49  return false;
50}
51