--- a/nashorn/src/jdk/nashorn/internal/runtime/SpecializedMethodChooser.java	Wed Jul 05 18:46:58 2017 +0200
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,99 +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.runtime;
-
-import java.lang.invoke.MethodHandle;
-import java.lang.invoke.MethodType;
-import jdk.nashorn.internal.codegen.types.Type;
-import jdk.nashorn.internal.runtime.options.Options;
-
-class SpecializedMethodChooser {
-    /** Should specialized function and specialized constructors for the builtin be used if available? */
-    private static final boolean DISABLE_SPECIALIZATION = Options.getBooleanProperty("nashorn.scriptfunction.specialization.disable");
-
-    static MethodHandle candidateWithLowestWeight(final MethodType descType, final MethodHandle initialCandidate, final MethodHandle[] specs) {
-        if (DISABLE_SPECIALIZATION || specs == null) {
-            return initialCandidate;
-        }
-
-        int          minimumWeight = Integer.MAX_VALUE;
-        MethodHandle candidate     = initialCandidate;
-
-        for (final MethodHandle spec : specs) {
-            final MethodType specType = spec.type();
-
-            if (!typeCompatible(descType, specType)) {
-                continue;
-            }
-
-            //return type is ok. we want a wider or equal one for our callsite.
-            final int specWeight = weigh(specType);
-            if (specWeight < minimumWeight) {
-                candidate = spec;
-                minimumWeight = specWeight;
-            }
-        }
-
-        return candidate;
-    }
-
-    private static boolean typeCompatible(final MethodType desc, final MethodType spec) {
-        //spec must fit in desc
-        final Class<?>[] dparray = desc.parameterArray();
-        final Class<?>[] sparray = spec.parameterArray();
-
-        if (dparray.length != sparray.length) {
-            return false;
-        }
-
-        for (int i = 0; i < dparray.length; i++) {
-            final Type dp = Type.typeFor(dparray[i]);
-            final Type sp = Type.typeFor(sparray[i]);
-
-            if (dp.isBoolean()) {
-                return false; //don't specialize on booleans, we have the "true" vs int 1 ambiguity in resolution
-            }
-
-            //specialization arguments must be at least as wide as dp, if not wider
-            if (Type.widest(dp, sp) != sp) {
-                //e.g. specialization takes double and callsite says "object". reject.
-                //but if specialization says double and callsite says "int" or "long" or "double", that's fine
-                return false;
-            }
-        }
-
-        return true; // anything goes for return type, take the convenient one and it will be upcasted thru dynalink magic.
-    }
-
-    private static int weigh(final MethodType t) {
-        int weight = Type.typeFor(t.returnType()).getWeight();
-        for (final Class<?> paramType : t.parameterArray()) {
-            final int pweight = Type.typeFor(paramType).getWeight();
-            weight += pweight;
-        }
-        return weight;
-    }
-}