1 files changed, 63 insertions, 0 deletions
diff --git a/Source/JavaScriptCore/b3/B3UseCounts.cpp b/Source/JavaScriptCore/b3/B3UseCounts.cpp
new file mode 100644
index 000000000..5fe18d4ff
--- /dev/null
+++ b/Source/JavaScriptCore/b3/B3UseCounts.cpp
@@ -0,0 +1,63 @@
+/*
+ * 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. 
+ */
+
+#include "config.h"
+#include "B3UseCounts.h"
+
+#if ENABLE(B3_JIT)
+
+#include "B3Procedure.h"
+
+namespace JSC { namespace B3 {
+
+UseCounts::UseCounts(Procedure& procedure)
+    : m_counts(procedure.values().size())
+{
+    Vector<Value*, 64> children;
+    for (Value* value : procedure.values()) {
+        children.resize(0);
+        for (Value* child : value->children()) {
+            m_counts[child].numUses++;
+            children.append(child);
+        }
+        std::sort(children.begin(), children.end());
+        Value* last = nullptr;
+        for (Value* child : children) {
+            if (child == last)
+                continue;
+
+            m_counts[child].numUsingInstructions++;
+            last = child;
+        }
+    }
+}
+
+UseCounts::~UseCounts()
+{
+}
+
+} } // namespace JSC::B3
+
+#endif // ENABLE(B3_JIT)