1 files changed, 145 insertions, 0 deletions
diff --git a/Source/JavaScriptCore/dfg/DFGPureValue.h b/Source/JavaScriptCore/dfg/DFGPureValue.h
new file mode 100644
index 000000000..e7d6a3db4
--- /dev/null
+++ b/Source/JavaScriptCore/dfg/DFGPureValue.h
@@ -0,0 +1,145 @@
+/*
+ * Copyright (C) 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 DFGPureValue_h
+#define DFGPureValue_h
+
+#if ENABLE(DFG_JIT)
+
+#include "DFGNode.h"
+
+namespace JSC { namespace DFG {
+
+class PureValue {
+public:
+    PureValue()
+        : m_op(LastNodeType)
+        , m_info(0)
+    {
+    }
+    
+    PureValue(NodeType op, const AdjacencyList& children, uintptr_t info)
+        : m_op(op)
+        , m_children(children.sanitized())
+        , m_info(info)
+    {
+        ASSERT(!(defaultFlags(op) & NodeHasVarArgs));
+    }
+    
+    PureValue(NodeType op, const AdjacencyList& children, const void* ptr)
+        : PureValue(op, children, bitwise_cast<uintptr_t>(ptr))
+    {
+    }
+    
+    PureValue(NodeType op, const AdjacencyList& children)
+        : PureValue(op, children, static_cast<uintptr_t>(0))
+    {
+    }
+    
+    PureValue(Node* node, uintptr_t info)
+        : PureValue(node->op(), node->children, info)
+    {
+    }
+    
+    PureValue(Node* node, const void* ptr)
+        : PureValue(node->op(), node->children, ptr)
+    {
+    }
+    
+    PureValue(Node* node)
+        : PureValue(node->op(), node->children)
+    {
+    }
+    
+    PureValue(WTF::HashTableDeletedValueType)
+        : m_op(LastNodeType)
+        , m_info(1)
+    {
+    }
+    
+    bool operator!() const { return m_op == LastNodeType && !m_info; }
+    
+    NodeType op() const { return m_op; }
+    const AdjacencyList& children() const { return m_children; }
+    uintptr_t info() const { return m_info; }
+
+    unsigned hash() const
+    {
+        return WTF::IntHash<int>::hash(static_cast<int>(m_op)) + m_children.hash() + m_info;
+    }
+    
+    bool operator==(const PureValue& other) const
+    {
+        return m_op == other.m_op
+            && m_children == other.m_children
+            && m_info == other.m_info;
+    }
+    
+    bool isHashTableDeletedValue() const
+    {
+        return m_op == LastNodeType && m_info;
+    }
+    
+    void dump(PrintStream& out) const;
+    
+private:
+    NodeType m_op;
+    AdjacencyList m_children;
+    uintptr_t m_info;
+};
+
+struct PureValueHash {
+    static unsigned hash(const PureValue& key) { return key.hash(); }
+    static bool equal(const PureValue& a, const PureValue& b) { return a == b; }
+    static const bool safeToCompareToEmptyOrDeleted = true;
+};
+
+} } // namespace JSC::DFG
+
+namespace WTF {
+
+template<typename T> struct DefaultHash;
+template<> struct DefaultHash<JSC::DFG::PureValue> {
+    typedef JSC::DFG::PureValueHash Hash;
+};
+
+template<typename T> struct HashTraits;
+template<> struct HashTraits<JSC::DFG::PureValue> : SimpleClassHashTraits<JSC::DFG::PureValue> {
+    static const bool emptyValueIsZero = false;
+};
+
+} // namespace WTF
+
+namespace JSC { namespace DFG {
+
+typedef HashMap<PureValue, Node*> PureMap;
+typedef HashMap<PureValue, Vector<Node*>> PureMultiMap;
+
+} } // namespace JSC::DFG
+
+#endif // ENABLE(DFG_JIT)
+
+#endif // DFGPureValue_h
+