--- a/src/jdk.internal.vm.compiler/share/classes/org.graalvm.compiler.phases/src/org/graalvm/compiler/phases/verify/VerifyUpdateUsages.java	Mon Dec 10 16:49:54 2018 -0500
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,116 +0,0 @@
-/*
- * Copyright (c) 2013, 2015, 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.
- *
- * 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 org.graalvm.compiler.phases.verify;
-
-import java.util.List;
-
-import org.graalvm.compiler.graph.Node;
-import org.graalvm.compiler.graph.Node.Input;
-import org.graalvm.compiler.graph.Node.OptionalInput;
-import org.graalvm.compiler.graph.NodeInputList;
-import org.graalvm.compiler.nodes.StructuredGraph;
-import org.graalvm.compiler.nodes.java.LoadFieldNode;
-import org.graalvm.compiler.nodes.java.MethodCallTargetNode;
-import org.graalvm.compiler.nodes.java.StoreFieldNode;
-import org.graalvm.compiler.phases.VerifyPhase;
-import org.graalvm.compiler.phases.tiers.PhaseContext;
-
-import jdk.vm.ci.meta.ResolvedJavaField;
-import jdk.vm.ci.meta.ResolvedJavaMethod;
-import jdk.vm.ci.meta.ResolvedJavaType;
-
-/**
- * Try to ensure that methods which update {@link Input} or {@link OptionalInput} fields also
- * include a call to {@link Node#updateUsages} or {@link Node#updateUsagesInterface}.
- */
-public class VerifyUpdateUsages extends VerifyPhase<PhaseContext> {
-
-    @Override
-    public boolean checkContract() {
-        return false;
-    }
-
-    public VerifyUpdateUsages() {
-    }
-
-    @Override
-    protected boolean verify(StructuredGraph graph, PhaseContext context) {
-        if (graph.method().isConstructor()) {
-            return true;
-        }
-        /*
-         * There are only two acceptable patterns for methods which update Node inputs, either a
-         * single StoreField node and invoke of updateUsages or updateUsagesInterface, or 2
-         * StoreFields that come from LoadFields on the same object. Other patterns can be added as
-         * needed but it would be best to keep things simple so that verification can be simple.
-         */
-        List<StoreFieldNode> stores = graph.getNodes().filter(StoreFieldNode.class).snapshot();
-        ResolvedJavaType declaringClass = graph.method().getDeclaringClass();
-        ResolvedJavaType nodeInputList = context.getMetaAccess().lookupJavaType(NodeInputList.class);
-        StoreFieldNode storeField1 = null;
-        StoreFieldNode storeField2 = null;
-        for (StoreFieldNode store : stores) {
-            if (isNodeInput(store.field(), declaringClass, nodeInputList)) {
-                if (storeField1 == null) {
-                    storeField1 = store;
-                } else if (storeField2 == null) {
-                    storeField2 = store;
-                } else {
-                    return false;
-                }
-            }
-        }
-        if (storeField1 == null) {
-            return true;
-        }
-        if (storeField2 == null) {
-            // Single input field update so just check for updateUsages or updateUsagesInterface
-            // call
-            ResolvedJavaType node = context.getMetaAccess().lookupJavaType(Node.class);
-            for (MethodCallTargetNode call : graph.getNodes().filter(MethodCallTargetNode.class)) {
-                ResolvedJavaMethod callee = call.targetMethod();
-                if (callee.getDeclaringClass().equals(node) && (callee.getName().equals("updateUsages") || callee.getName().equals("updateUsagesInterface"))) {
-                    return true;
-                }
-            }
-        } else {
-            if (storeField1.value() instanceof LoadFieldNode && storeField2.value() instanceof LoadFieldNode) {
-                LoadFieldNode load1 = (LoadFieldNode) storeField1.value();
-                LoadFieldNode load2 = (LoadFieldNode) storeField2.value();
-                // Check for swapping values within the same object
-                if (load1.object() == storeField1.object() && load2.object() == storeField2.object() && storeField1.object() == storeField2.object() &&
-                                load1.field().equals(storeField2.field()) && load2.field().equals(storeField1.field())) {
-                    return true;
-                }
-            }
-        }
-        return false;
-    }
-
-    boolean isNodeInput(ResolvedJavaField field, ResolvedJavaType declaringClass, ResolvedJavaType nodeInputList) {
-        return declaringClass.isAssignableFrom(field.getDeclaringClass()) && (field.getAnnotation(Input.class) != null || field.getAnnotation(OptionalInput.class) != null) &&
-                        !field.getType().equals(nodeInputList);
-    }
-}