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(a&: Val, b&: RHS.Val);
19 std::swap(a&: Next, b&: RHS.Next);
20 std::swap(a&: Prev, b&: RHS.Prev);
21
22 if (Prev)
23 *Prev = this;
24
25 if (Next)
26 Next->Prev = &Next;
27
28 if (RHS.Prev)
29 *RHS.Prev = &RHS;
30
31 if (RHS.Next)
32 RHS.Next->Prev = &RHS.Next;
33}
34
35unsigned Use::getOperandNo() const {
36 return this - getUser()->op_begin();
37}
38
39void Use::zap(Use *Start, const Use *Stop, bool del) {
40 while (Start != Stop)
41 (--Stop)->~Use();
42 if (del)
43 ::operator delete(Start);
44}
45
46} // namespace llvm
47