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1 files changed, 0 insertions, 138 deletions

diff --git a/Source/JavaScriptCore/runtime/InferredValue.h b/Source/JavaScriptCore/runtime/InferredValue.h
deleted file mode 100644
index 28318e992..000000000
--- a/Source/JavaScriptCore/runtime/InferredValue.h
+++ /dev/null
@@ -1,138 +0,0 @@
-/*
- * Copyright (C) 2015 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 InferredValue_h
-#define InferredValue_h
-
-#include "JSCell.h"
-#include "Watchpoint.h"
-#include "WriteBarrier.h"
-
-namespace JSC {
-
-// Allocate one of these if you'd like to infer a constant value. Writes to the value should use
-// notifyWrite(). So long as exactly one value had ever been written and invalidate() has never been
-// called, and you register a watchpoint, you can rely on the inferredValue() being the one true
-// value.
-//
-// Commonly used for inferring singletons - in that case each allocation does notifyWrite(). But you
-// can use it for other things as well.
-
-class InferredValue : public JSCell {
-public:
-    typedef JSCell Base;
-    
-    static InferredValue* create(VM&);
-    
-    static const bool needsDestruction = true;
-    static void destroy(JSCell*);
-    
-    static Structure* createStructure(VM&, JSGlobalObject*, JSValue prototype);
-    
-    static void visitChildren(JSCell*, SlotVisitor&);
-    
-    DECLARE_INFO;
-    
-    // For the purpose of deciding whether or not to watch this variable, you only need
-    // to inspect inferredValue(). If this returns something other than the empty
-    // value, then it means that at all future safepoints, this watchpoint set will be
-    // in one of these states:
-    //
-    //    IsWatched: in this case, the variable's value must still be the
-    //        inferredValue.
-    //
-    //    IsInvalidated: in this case the variable's value may be anything but you'll
-    //        either notice that it's invalidated and not install the watchpoint, or
-    //        you will have been notified that the watchpoint was fired.
-    JSValue inferredValue() { return m_value.get(); }
-
-    // Forwards some WatchpointSet methods.
-    WatchpointState state() const { return m_set.state(); }
-    bool isStillValid() const { return m_set.isStillValid(); }
-    bool hasBeenInvalidated() const { return m_set.hasBeenInvalidated(); }
-    void add(Watchpoint* watchpoint) { m_set.add(watchpoint); }
-    
-    void notifyWrite(VM& vm, JSValue value, const FireDetail& detail)
-    {
-        if (LIKELY(m_set.stateOnJSThread() == IsInvalidated))
-            return;
-        notifyWriteSlow(vm, value, detail);
-    }
-    
-    void notifyWrite(VM& vm, JSValue value, const char* reason)
-    {
-        if (LIKELY(m_set.stateOnJSThread() == IsInvalidated))
-            return;
-        notifyWriteSlow(vm, value, reason);
-    }
-    
-    void invalidate(const FireDetail& detail)
-    {
-        m_value.clear();
-        m_set.invalidate(detail);
-    }
-    
-    static const unsigned StructureFlags = StructureIsImmortal | Base::StructureFlags;
-    
-    // We could have used Weak<>. But we want arbitrary JSValues, not just cells. It's also somewhat
-    // convenient to have eager notification of death.
-    //
-    // Also note that this should be a private class, but it isn't because Windows.
-    class ValueCleanup : public UnconditionalFinalizer {
-        WTF_MAKE_FAST_ALLOCATED;
-        
-    public:
-        ValueCleanup(InferredValue*);
-        virtual ~ValueCleanup();
-        
-    protected:
-        void finalizeUnconditionally() override;
-        
-    private:
-        InferredValue* m_owner;
-    };
-    
-private:
-    InferredValue(VM&);
-    ~InferredValue();
-    
-    JS_EXPORT_PRIVATE void notifyWriteSlow(VM&, JSValue, const FireDetail&);
-    JS_EXPORT_PRIVATE void notifyWriteSlow(VM&, JSValue, const char* reason);
-    
-    friend class ValueCleanup;
-    
-    InlineWatchpointSet m_set;
-    WriteBarrier<Unknown> m_value;
-    std::unique_ptr<ValueCleanup> m_cleanup;
-};
-
-// FIXME: We could have an InlineInferredValue, which only allocates the InferredValue object when
-// a notifyWrite() transitions us towards watching, and then clears the reference (allowing the object
-// to die) when we get invalidated.
-
-} // namespace JSC
-
-#endif // InferredValue_h
-