1 files changed, 65 insertions, 0 deletions
diff --git a/Source/JavaScriptCore/dfg/DFGEdgeUsesStructure.h b/Source/JavaScriptCore/dfg/DFGEdgeUsesStructure.h
new file mode 100644
index 000000000..d5e748f1f
--- /dev/null
+++ b/Source/JavaScriptCore/dfg/DFGEdgeUsesStructure.h
@@ -0,0 +1,65 @@
+/*
+ * Copyright (C) 2013 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 DFGEdgeUsesStructure_h
+#define DFGEdgeUsesStructure_h
+
+#if ENABLE(DFG_JIT)
+
+#include "DFGGraph.h"
+
+namespace JSC { namespace DFG {
+
+class EdgeUsesStructure {
+public:
+    EdgeUsesStructure()
+        : m_result(false)
+    {
+    }
+    
+    void operator()(Node*, Edge edge)
+    {
+        m_result |= usesStructure(edge.useKind());
+    }
+    
+    bool result() const { return m_result; }
+    
+private:
+    bool m_result;
+};
+
+inline bool edgesUseStructure(Graph& graph, Node* node)
+{
+    EdgeUsesStructure edgeUsesStructure;
+    DFG_NODE_DO_TO_CHILDREN(graph, node, edgeUsesStructure);
+    return edgeUsesStructure.result();
+}
+
+} } // namespace JSC::DFG
+
+#endif // ENABLE(DFG_JIT)
+
+#endif // DFGEdgeUsesStructure_h
+