gt:         return getTag(slot) == FrameSlotKind.Object.ordinal();
context: /*
   * Copyright (c) 2012, 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.oracle.truffle.api.impl;
  
  import java.util.*;
  
  import com.oracle.truffle.api.*;
  import com.oracle.truffle.api.frame.*;
  
  /**
   * This is an implementation-specific class. Do not use or instantiate it. Instead, use
   * {@link TruffleRuntime#createVirtualFrame(Object[], FrameDescriptor)} to create a
   * {@link VirtualFrame}.
   */
  final class DefaultVirtualFrame implements VirtualFrame {
  
      private final FrameDescriptor descriptor;
      private final Object[] arguments;
      private Object[] locals;
      private byte[] tags;
  
      DefaultVirtualFrame(FrameDescriptor descriptor, Object[] arguments) {
          this.descriptor = descriptor;
          this.arguments = arguments;
          this.locals = new Object[descriptor.getSize()];
          Arrays.fill(locals, descriptor.getTypeConversion().getDefaultValue());
          this.tags = new byte[descriptor.getSize()];
      }
  
      @Override
      public Object[] getArguments() {
          return arguments;
      }
  
      @Override
      public MaterializedFrame materialize() {
          return new DefaultMaterializedFrame(this);
      }
  
      @Override
      public Object getObject(FrameSlot slot) throws FrameSlotTypeException {
          verifyGet(slot, FrameSlotKind.Object);
          return locals[slot.getIndex()];
      }
  
      @Override
      public void setObject(FrameSlot slot, Object value) {
          verifySet(slot, FrameSlotKind.Object);
          locals[slot.getIndex()] = value;
      }
  
      @Override
      public byte getByte(FrameSlot slot) throws FrameSlotTypeException {
          verifyGet(slot, FrameSlotKind.Byte);
          return (byte) locals[slot.getIndex()];
      }
  
      @Override
      public void setByte(FrameSlot slot, byte value) {
          verifySet(slot, FrameSlotKind.Byte);
          locals[slot.getIndex()] = value;
      }
  
      @Override
      public boolean getBoolean(FrameSlot slot) throws FrameSlotTypeException {
          verifyGet(slot, FrameSlotKind.Boolean);
          return (boolean) locals[slot.getIndex()];
      }
  
      @Override
      public void setBoolean(FrameSlot slot, boolean value) {
          verifySet(slot, FrameSlotKind.Boolean);
          locals[slot.getIndex()] = value;
      }
  
      @Override
      public int getInt(FrameSlot slot) throws FrameSlotTypeException {
          verifyGet(slot, FrameSlotKind.Int);
          return (int) locals[slot.getIndex()];
      }
  
      @Override
      public void setInt(FrameSlot slot, int value) {
          verifySet(slot, FrameSlotKind.Int);
          locals[slot.getIndex()] = value;
      }
  
      @Override
      public long getLong(FrameSlot slot) throws FrameSlotTypeException {
          verifyGet(slot, FrameSlotKind.Long);
          return (long) locals[slot.getIndex()];
      }
  
      @Override
      public void setLong(FrameSlot slot, long value) {
          verifySet(slot, FrameSlotKind.Long);
          locals[slot.getIndex()] = value;
      }
  
      @Override
      public float getFloat(FrameSlot slot) throws FrameSlotTypeException {
          verifyGet(slot, FrameSlotKind.Float);
          return (float) locals[slot.getIndex()];
      }
  
      @Override
      public void setFloat(FrameSlot slot, float value) {
          verifySet(slot, FrameSlotKind.Float);
          locals[slot.getIndex()] = value;
      }
  
      @Override
      public double getDouble(FrameSlot slot) throws FrameSlotTypeException {
          verifyGet(slot, FrameSlotKind.Double);
          return (double) locals[slot.getIndex()];
      }
  
      @Override
      public void setDouble(FrameSlot slot, double value) {
          verifySet(slot, FrameSlotKind.Double);
          locals[slot.getIndex()] = value;
      }
  
      @Override
      public FrameDescriptor getFrameDescriptor() {
          return this.descriptor;
      }
  
      @Override
      public Object getValue(FrameSlot slot) {
          int slotIndex = slot.getIndex();
          if (slotIndex >= tags.length) {
              if (!resize()) {
                  throw new IllegalArgumentException(String.format("The frame slot '%s' is not known by the frame descriptor.", slot));
              }
          }
          return locals[slotIndex];
      }
  
      private void verifySet(FrameSlot slot, FrameSlotKind accessKind) {
          int slotIndex = slot.getIndex();
          if (slotIndex >= tags.length) {
              if (!resize()) {
                  throw new IllegalArgumentException(String.format("The frame slot '%s' is not known by the frame descriptor.", slot));
              }
          }
          tags[slotIndex] = (byte) accessKind.ordinal();
      }
  
      private void verifyGet(FrameSlot slot, FrameSlotKind accessKind) throws FrameSlotTypeException {
          int slotIndex = slot.getIndex();
          if (slotIndex >= tags.length) {
              if (!resize()) {
                  throw new IllegalArgumentException(String.format("The frame slot '%s' is not known by the frame descriptor.", slot));
              }
          }
          byte tag = tags[slotIndex];
          if (accessKind == FrameSlotKind.Object ? tag != 0 : tag != accessKind.ordinal()) {
              if (slot.getKind() == accessKind || tag == 0) {
                  descriptor.getTypeConversion().updateFrameSlot(this, slot, getValue(slot));
                  if (tags[slotIndex] == accessKind.ordinal()) {
                      return;
                  }
              }
              throw new FrameSlotTypeException();
          }
      }
  
      private boolean resize() {
          int oldSize = tags.length;
          int newSize = descriptor.getSize();
          if (newSize > oldSize) {
              locals = Arrays.copyOf(locals, newSize);
              Arrays.fill(locals, oldSize, newSize, descriptor.getTypeConversion().getDefaultValue());
              tags = Arrays.copyOf(tags, newSize);
              return true;
          }
          return false;
      }
  
      private byte getTag(FrameSlot slot) {
          int slotIndex = slot.getIndex();
          if (slotIndex >= tags.length) {
              if (!resize()) {
                  throw new IllegalArgumentException(String.format("The frame slot '%s' is not known by the frame descriptor.", slot));
              }
          }
          return tags[slotIndex];
      }
  
      @Override
      public boolean isObject(FrameSlot slot) {
  