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diff --git a/Source/JavaScriptCore/dfg/DFGNaiveDominators.h b/Source/JavaScriptCore/dfg/DFGNaiveDominators.h
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--- a/Source/JavaScriptCore/dfg/DFGNaiveDominators.h
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-/*
- * Copyright (C) 2011, 2014 Apple Inc. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- *
- * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
- * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
- * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
- * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
- * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
- * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
- * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 
- */
-
-#ifndef DFGNaiveDominators_h
-#define DFGNaiveDominators_h
-
-#if ENABLE(DFG_JIT)
-
-#include "DFGBasicBlock.h"
-#include "DFGCommon.h"
-#include <wtf/FastBitVector.h>
-
-namespace JSC { namespace DFG {
-
-class Graph;
-
-// This class is only used for validating the real dominators implementation.
-
-class NaiveDominators {
-public:
-    NaiveDominators();
-    ~NaiveDominators();
-    
-    void compute(Graph&);
-    
-    bool dominates(BlockIndex from, BlockIndex to) const
-    {
-        return m_results[to].get(from);
-    }
-    
-    bool dominates(BasicBlock* from, BasicBlock* to) const
-    {
-        return dominates(from->index, to->index);
-    }
-    
-    void dump(Graph&, PrintStream&) const;
-    
-private:
-    bool pruneDominators(Graph&, BlockIndex);
-    
-    Vector<FastBitVector> m_results; // For each block, the bitvector of blocks that dominate it.
-    FastBitVector m_scratch; // A temporary bitvector with bit for each block. We recycle this to save new/deletes.
-};
-
-} } // namespace JSC::DFG
-
-#endif // ENABLE(DFG_JIT)
-
-#endif // DFGNaiveDominators_h