| 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 | |
| 12 | namespace llvm { |
| 13 | |
| 14 | void 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 | *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 | |
| 31 | unsigned Use::getOperandNo() const { |
| 32 | return this - getUser()->op_begin(); |
| 33 | } |
| 34 | |
| 35 | void 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 |