1//===-- Use.cpp - Implement the Use class ---------------------------------===//
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#include "llvm/IR/Use.h"
10#include "llvm/IR/User.h"
11
12namespace llvm {
13
14void Use::swap(Use &RHS) {
15  if (Val == RHS.Val)
16    return;
17
18  std::swap(Val, RHS.Val);
19  std::swap(Next, RHS.Next);
20  std::swap(Prev, RHS.Prev);
21
22  *Prev = this;
23  if (Next)
24    Next->Prev = &Next;
25
26  *RHS.Prev = &RHS;
27  if (RHS.Next)
28    RHS.Next->Prev = &RHS.Next;
29}
30
31unsigned Use::getOperandNo() const {
32  return this - getUser()->op_begin();
33}
34
35void Use::zap(Use *Start, const Use *Stop, bool del) {
36  while (Start != Stop)
37    (--Stop)->~Use();
38  if (del)
39    ::operator delete(Start);
40}
41
42} // namespace llvm
43