--- old/src/jdk.scripting.nashorn/share/classes/jdk/nashorn/internal/ir/JoinPredecessorExpression.java	2020-04-15 18:47:49.000000000 +0530
+++ /dev/null	2020-04-15 18:47:49.000000000 +0530
@@ -1,131 +0,0 @@
-/*
- * Copyright (c) 2010, 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 jdk.nashorn.internal.ir;
-
-import jdk.nashorn.internal.codegen.types.Type;
-import jdk.nashorn.internal.ir.visitor.NodeVisitor;
-
-/**
- * A wrapper for an expression that is in a position to be a join predecessor.
- */
-public class JoinPredecessorExpression extends Expression implements JoinPredecessor {
-    private static final long serialVersionUID = 1L;
-
-    private final Expression expression;
-    private final LocalVariableConversion conversion;
-
-    /**
-     * A no-arg constructor does not wrap any expression on its own, but can be used as a place to contain a local
-     * variable conversion in a place where an expression can otherwise stand.
-     */
-    public JoinPredecessorExpression() {
-        this(null);
-    }
-
-    /**
-     * A constructor for wrapping an expression and making it a join predecessor. Typically used on true and false
-     * subexpressions of the ternary node as well as on the operands of short-circuiting logical expressions {@code &&}
-     * and {@code ||}.
-     * @param expression the expression to wrap
-     */
-    public JoinPredecessorExpression(final Expression expression) {
-        this(expression, null);
-    }
-
-    private JoinPredecessorExpression(final Expression expression, final LocalVariableConversion conversion) {
-        super(expression == null ? 0L : expression.getToken(), expression == null ? 0 : expression.getStart(), expression == null ? 0 : expression.getFinish());
-        this.expression = expression;
-        this.conversion = conversion;
-    }
-
-    @Override
-    public JoinPredecessor setLocalVariableConversion(final LexicalContext lc, final LocalVariableConversion conversion) {
-        if(conversion == this.conversion) {
-            return this;
-        }
-        return new JoinPredecessorExpression(expression, conversion);
-    }
-
-    @Override
-    public Type getType() {
-        return expression.getType();
-    }
-
-    @Override
-    public boolean isAlwaysFalse() {
-        return expression != null && expression.isAlwaysFalse();
-    }
-
-    @Override
-    public boolean isAlwaysTrue() {
-        return expression != null && expression.isAlwaysTrue();
-    }
-
-    /**
-     * Returns the underlying expression.
-     * @return the underlying expression.
-     */
-    public Expression getExpression() {
-        return expression;
-    }
-
-    /**
-     * Sets the underlying expression.
-     * @param expression the new underlying expression
-     * @return this or modified join predecessor expression object.
-     */
-    public JoinPredecessorExpression setExpression(final Expression expression) {
-        if(expression == this.expression) {
-            return this;
-        }
-        return new JoinPredecessorExpression(expression, conversion);
-    }
-
-    @Override
-    public LocalVariableConversion getLocalVariableConversion() {
-        return conversion;
-    }
-
-    @Override
-    public Node accept(final NodeVisitor<? extends LexicalContext> visitor) {
-        if(visitor.enterJoinPredecessorExpression(this)) {
-            final Expression expr = getExpression();
-            return visitor.leaveJoinPredecessorExpression(expr == null ? this : setExpression((Expression)expr.accept(visitor)));
-        }
-        return this;
-    }
-
-    @Override
-    public void toString(final StringBuilder sb, final boolean printType) {
-        if(expression != null) {
-            expression.toString(sb, printType);
-        }
-        if(conversion != null) {
-            conversion.toString(sb);
-        }
-    }
-
-}