Imported WebKit commit 8ff1f22783a32de82fee915abd55bd1b298f2644 (http://svn.webkit.org/repository/webkit/trunk@122325)

New snapshot that should work with the latest Qt build system changes

1 files changed, 129 insertions, 0 deletions

diff --git a/Source/JavaScriptCore/dfg/DFGMinifiedNode.h b/Source/JavaScriptCore/dfg/DFGMinifiedNode.h
new file mode 100644
index 000000000..b80cbd777
--- /dev/null
+++ b/Source/JavaScriptCore/dfg/DFGMinifiedNode.h
@@ -0,0 +1,129 @@
+/*
+ * Copyright (C) 2012 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 DFGMinifiedNode_h
+#define DFGMinifiedNode_h
+
+#include <wtf/Platform.h>
+
+#if ENABLE(DFG_JIT)
+
+#include "DFGCommon.h"
+#include "DFGNodeType.h"
+
+namespace JSC { namespace DFG {
+
+struct Node;
+
+inline bool belongsInMinifiedGraph(NodeType type)
+{
+    switch (type) {
+    case JSConstant:
+    case WeakJSConstant:
+    case ValueToInt32:
+    case Int32ToDouble:
+    case UInt32ToNumber:
+    case DoubleAsInt32:
+    case PhantomArguments:
+        return true;
+    default:
+        return false;
+    }
+}
+
+class MinifiedNode {
+public:
+    MinifiedNode() { }
+    
+    static MinifiedNode fromNode(NodeIndex, Node&);
+    
+    NodeIndex index() const { return m_index; }
+    NodeType op() const { return m_op; }
+    
+    bool hasChild1() const { return hasChild(m_op); }
+    
+    NodeIndex child1() const
+    {
+        ASSERT(hasChild(m_op));
+        return m_childOrInfo;
+    }
+    
+    bool hasConstant() const { return hasConstantNumber() || hasWeakConstant(); }
+    
+    bool hasConstantNumber() const { return hasConstantNumber(m_op); }
+    
+    unsigned constantNumber() const
+    {
+        ASSERT(hasConstantNumber(m_op));
+        return m_childOrInfo;
+    }
+    
+    bool hasWeakConstant() const { return hasWeakConstant(m_op); }
+    
+    JSCell* weakConstant() const
+    {
+        ASSERT(hasWeakConstant(m_op));
+        return bitwise_cast<JSCell*>(m_childOrInfo);
+    }
+    
+    static NodeIndex getIndex(MinifiedNode* node) { return node->index(); }
+    static bool compareByNodeIndex(const MinifiedNode& a, const MinifiedNode& b)
+    {
+        return a.m_index < b.m_index;
+    }
+    
+private:
+    static bool hasChild(NodeType type)
+    {
+        switch (type) {
+        case ValueToInt32:
+        case Int32ToDouble:
+        case UInt32ToNumber:
+        case DoubleAsInt32:
+            return true;
+        default:
+            return false;
+        }
+    }
+    static bool hasConstantNumber(NodeType type)
+    {
+        return type == JSConstant;
+    }
+    static bool hasWeakConstant(NodeType type)
+    {
+        return type == WeakJSConstant;
+    }
+    
+    NodeIndex m_index;
+    NodeType m_op;
+    uintptr_t m_childOrInfo; // Nodes in the minified graph have only one child each.
+};
+
+} } // namespace JSC::DFG
+
+#endif // ENABLE(DFG_JIT)
+
+#endif // DFGMinifiedNode_h
+