--- a/langtools/src/jdk.compiler/share/classes/com/sun/tools/javac/jvm/LVTRanges.java	Thu Jan 15 11:18:14 2015 +0100
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,129 +0,0 @@
-/*
- * Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved.
- * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
- *
- * This code is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License version 2 only, as
- * published by the Free Software Foundation.  Oracle designates this
- * particular file as subject to the "Classpath" exception as provided
- * by Oracle in the LICENSE file that accompanied this code.
- *
- * This code is distributed in the hope that it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
- * version 2 for more details (a copy is included in the LICENSE file that
- * accompanied this code).
- *
- * You should have received a copy of the GNU General Public License version
- * 2 along with this work; if not, write to the Free Software Foundation,
- * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
- *
- * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
- * or visit www.oracle.com if you need additional information or have any
- * questions.
- */
-
-package com.sun.tools.javac.jvm;
-
-import java.util.Map;
-import java.util.Map.Entry;
-import java.util.WeakHashMap;
-
-import com.sun.tools.javac.code.Symbol.MethodSymbol;
-import com.sun.tools.javac.code.Symbol.VarSymbol;
-import com.sun.tools.javac.tree.JCTree;
-import com.sun.tools.javac.util.Context;
-import com.sun.tools.javac.util.List;
-
-/** This class contains a one to many relation between a tree and a set of variables.
- *  The relation implies that the given tree closes the DA (definite assignment)
- *  range for the set of variables.
- *
- *  <p><b>This is NOT part of any supported API.
- *  If you write code that depends on this, you do so at your own risk.
- *  This code and its internal interfaces are subject to change or
- *  deletion without notice.</b>
- */
-public class LVTRanges {
-    /** The context key for the LVT ranges. */
-    protected static final Context.Key<LVTRanges> lvtRangesKey = new Context.Key<>();
-
-    /** Get the LVTRanges instance for this context. */
-    public static LVTRanges instance(Context context) {
-        LVTRanges instance = context.get(lvtRangesKey);
-        if (instance == null) {
-            instance = new LVTRanges(context);
-        }
-        return instance;
-    }
-
-    private static final long serialVersionUID = 1812267524140424433L;
-
-    protected Context context;
-
-    protected Map<MethodSymbol, Map<JCTree, List<VarSymbol>>>
-            aliveRangeClosingTrees = new WeakHashMap<>();
-
-    public LVTRanges(Context context) {
-        this.context = context;
-        context.put(lvtRangesKey, this);
-    }
-
-    public List<VarSymbol> getVars(MethodSymbol method, JCTree tree) {
-        Map<JCTree, List<VarSymbol>> varMap = aliveRangeClosingTrees.get(method);
-        return (varMap != null) ? varMap.get(tree) : null;
-    }
-
-    public boolean containsKey(MethodSymbol method, JCTree tree) {
-        Map<JCTree, List<VarSymbol>> varMap = aliveRangeClosingTrees.get(method);
-        if (varMap == null) {
-            return false;
-        }
-        return varMap.containsKey(tree);
-    }
-
-    public void setEntry(MethodSymbol method, JCTree tree, List<VarSymbol> vars) {
-        Map<JCTree, List<VarSymbol>> varMap = aliveRangeClosingTrees.get(method);
-        if (varMap != null) {
-            varMap.put(tree, vars);
-        } else {
-            varMap = new WeakHashMap<>();
-            varMap.put(tree, vars);
-            aliveRangeClosingTrees.put(method, varMap);
-        }
-    }
-
-    public List<VarSymbol> removeEntry(MethodSymbol method, JCTree tree) {
-        Map<JCTree, List<VarSymbol>> varMap = aliveRangeClosingTrees.get(method);
-        if (varMap != null) {
-            List<VarSymbol> result = varMap.remove(tree);
-            if (varMap.isEmpty()) {
-                aliveRangeClosingTrees.remove(method);
-            }
-            return result;
-        }
-        return null;
-    }
-
-    /* This method should be used for debugging LVT related issues.
-     */
-    @Override
-    public String toString() {
-        String result = "";
-        for (Entry<MethodSymbol, Map<JCTree, List<VarSymbol>>> mainEntry: aliveRangeClosingTrees.entrySet()) {
-            result += "Method: \n" + mainEntry.getKey().flatName() + "\n";
-            int i = 1;
-            for (Entry<JCTree, List<VarSymbol>> treeEntry: mainEntry.getValue().entrySet()) {
-                result += "    Tree " + i + ": \n" + treeEntry.getKey().toString() + "\n";
-                result += "        Variables closed:\n";
-                for (VarSymbol var: treeEntry.getValue()) {
-                    result += "            " + var.toString();
-                }
-                result += "\n";
-                i++;
-            }
-        }
-        return result;
-    }
-
-}