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(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 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