10b57cec5SDimitry Andric //===-- Use.cpp - Implement the Use class ---------------------------------===// 20b57cec5SDimitry Andric // 30b57cec5SDimitry Andric // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 40b57cec5SDimitry Andric // See https://llvm.org/LICENSE.txt for license information. 50b57cec5SDimitry Andric // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 60b57cec5SDimitry Andric // 70b57cec5SDimitry Andric //===----------------------------------------------------------------------===// 80b57cec5SDimitry Andric 90b57cec5SDimitry Andric #include "llvm/IR/Use.h" 100b57cec5SDimitry Andric #include "llvm/IR/User.h" 110b57cec5SDimitry Andric #include "llvm/IR/Value.h" 120b57cec5SDimitry Andric #include <new> 130b57cec5SDimitry Andric 140b57cec5SDimitry Andric namespace llvm { 150b57cec5SDimitry Andric 160b57cec5SDimitry Andric void Use::swap(Use &RHS) { 170b57cec5SDimitry Andric if (Val == RHS.Val) 180b57cec5SDimitry Andric return; 190b57cec5SDimitry Andric 20*e8d8bef9SDimitry Andric std::swap(Val, RHS.Val); 21*e8d8bef9SDimitry Andric std::swap(Next, RHS.Next); 22*e8d8bef9SDimitry Andric std::swap(Prev, RHS.Prev); 230b57cec5SDimitry Andric 24*e8d8bef9SDimitry Andric *Prev = this; 25*e8d8bef9SDimitry Andric if (Next) 26*e8d8bef9SDimitry Andric Next->Prev = &Next; 270b57cec5SDimitry Andric 28*e8d8bef9SDimitry Andric *RHS.Prev = &RHS; 29*e8d8bef9SDimitry Andric if (RHS.Next) 30*e8d8bef9SDimitry Andric RHS.Next->Prev = &RHS.Next; 310b57cec5SDimitry Andric } 320b57cec5SDimitry Andric 330b57cec5SDimitry Andric unsigned Use::getOperandNo() const { 340b57cec5SDimitry Andric return this - getUser()->op_begin(); 350b57cec5SDimitry Andric } 360b57cec5SDimitry Andric 370b57cec5SDimitry Andric void Use::zap(Use *Start, const Use *Stop, bool del) { 380b57cec5SDimitry Andric while (Start != Stop) 390b57cec5SDimitry Andric (--Stop)->~Use(); 400b57cec5SDimitry Andric if (del) 410b57cec5SDimitry Andric ::operator delete(Start); 420b57cec5SDimitry Andric } 430b57cec5SDimitry Andric 445ffd83dbSDimitry Andric } // namespace llvm 45