--- a/src/jdk.internal.vm.compiler/share/classes/org.graalvm.compiler.lir/src/org/graalvm/compiler/lir/alloc/trace/TraceUtil.java	Mon Dec 10 16:49:54 2018 -0500
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,102 +0,0 @@
-/*
- * Copyright (c) 2015, 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.lir.alloc.trace;
-
-import java.util.ArrayList;
-
-import org.graalvm.compiler.core.common.alloc.Trace;
-import org.graalvm.compiler.core.common.alloc.TraceBuilderResult;
-import org.graalvm.compiler.core.common.cfg.AbstractBlockBase;
-import org.graalvm.compiler.lir.LIR;
-import org.graalvm.compiler.lir.LIRInstruction;
-import org.graalvm.compiler.lir.StandardOp.JumpOp;
-import org.graalvm.compiler.lir.StandardOp.LabelOp;
-
-import jdk.vm.ci.meta.Value;
-
-public class TraceUtil {
-
-    public static boolean isShadowedRegisterValue(Value value) {
-        assert value != null;
-        return value instanceof ShadowedRegisterValue;
-    }
-
-    public static ShadowedRegisterValue asShadowedRegisterValue(Value value) {
-        assert isShadowedRegisterValue(value);
-        return (ShadowedRegisterValue) value;
-    }
-
-    public static boolean isTrivialTrace(LIR lir, Trace trace) {
-        if (trace.size() != 1) {
-            return false;
-        }
-        ArrayList<LIRInstruction> instructions = lir.getLIRforBlock(trace.getBlocks()[0]);
-        if (instructions.size() != 2) {
-            return false;
-        }
-        assert instructions.get(0) instanceof LabelOp : "First instruction not a LabelOp: " + instructions.get(0);
-        if (((LabelOp) instructions.get(0)).isPhiIn()) {
-            /*
-             * Merge blocks are in general not trivial block because variables defined by a PHI
-             * always need a location. If the outgoing value of the predecessor is a constant we
-             * need to find an appropriate location (register or stack).
-             *
-             * Note that this case should not happen in practice since the trace containing the
-             * merge block should also contain one of the predecessors. For non-standard trace
-             * builders (e.g. the single block trace builder) this is not the true, though.
-             */
-            return false;
-        }
-        /*
-         * Now we need to check if the BlockEndOp has no special operand requirements (i.e.
-         * stack-slot, register). For now we just check for JumpOp because we know that it doesn't.
-         */
-        return instructions.get(1) instanceof JumpOp;
-    }
-
-    public static boolean hasInterTracePredecessor(TraceBuilderResult result, Trace trace, AbstractBlockBase<?> block) {
-        assert result.getTraceForBlock(block).equals(trace);
-        if (block.getPredecessorCount() == 0) {
-            // start block
-            return false;
-        }
-        if (block.getPredecessorCount() == 1) {
-            return !result.getTraceForBlock(block.getPredecessors()[0]).equals(trace);
-        }
-        return true;
-    }
-
-    public static boolean hasInterTraceSuccessor(TraceBuilderResult result, Trace trace, AbstractBlockBase<?> block) {
-        assert result.getTraceForBlock(block).equals(trace);
-        if (block.getSuccessorCount() == 0) {
-            // method end block
-            return false;
-        }
-        if (block.getSuccessorCount() == 1) {
-            return !result.getTraceForBlock(block.getSuccessors()[0]).equals(trace);
-        }
-        return true;
-    }
-}