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//===-- Use.cpp - Implement the Use class ---------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include "llvm/IR/Use.h"
#include "llvm/IR/User.h"
#include "llvm/IR/Value.h"
#include <new>
namespace llvm {
void Use::swap(Use &RHS) {
if (Val == RHS.Val)
return;
if (Val)
removeFromList();
Value *OldVal = Val;
if (RHS.Val) {
RHS.removeFromList();
Val = RHS.Val;
Val->addUse(*this);
} else {
Val = nullptr;
}
if (OldVal) {
RHS.Val = OldVal;
RHS.Val->addUse(RHS);
} else {
RHS.Val = nullptr;
}
}
unsigned Use::getOperandNo() const {
return this - getUser()->op_begin();
}
void Use::zap(Use *Start, const Use *Stop, bool del) {
while (Start != Stop)
(--Stop)->~Use();
if (del)
::operator delete(Start);
}
} // namespace llvm
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