--- /dev/null	2016-05-31 09:42:47.975716356 -0700
+++ new/src/jdk.vm.compiler/share/classes/org.graalvm.compiler.hotspot/src/org/graalvm/compiler/hotspot/word/MetaspacePointer.java	2016-12-07 13:50:55.041206535 -0800
@@ -0,0 +1,1002 @@
+/*
+ * Copyright (c) 2014, 2016, 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.hotspot.word;
+
+import static org.graalvm.compiler.hotspot.word.HotSpotOperation.HotspotOpcode.FROM_POINTER;
+import static org.graalvm.compiler.hotspot.word.HotSpotOperation.HotspotOpcode.IS_NULL;
+
+import org.graalvm.compiler.core.common.LocationIdentity;
+import org.graalvm.compiler.nodes.memory.HeapAccess.BarrierType;
+import org.graalvm.compiler.word.Pointer;
+import org.graalvm.compiler.word.Signed;
+import org.graalvm.compiler.word.Unsigned;
+import org.graalvm.compiler.word.Word;
+import org.graalvm.compiler.word.Word.Opcode;
+import org.graalvm.compiler.word.Word.Operation;
+import org.graalvm.compiler.word.WordBase;
+
+/**
+ * Marker type for a metaspace pointer.
+ */
+public abstract class MetaspacePointer {
+
+    @HotSpotOperation(opcode = IS_NULL)
+    public abstract boolean isNull();
+
+    @HotSpotOperation(opcode = FROM_POINTER)
+    public abstract Pointer asWord();
+
+    /**
+     * Reads the memory at address {@code (this + offset)}. Both the base address and offset are in
+     * bytes.
+     * <p>
+     * The offset is always treated as a {@link Signed} value. However, the static type is
+     * {@link WordBase} to avoid the frequent casts to of {@link Unsigned} values (where the caller
+     * knows that the highest-order bit of the unsigned value is never used).
+     *
+     * @param offset the signed offset for the memory access
+     * @param locationIdentity the identity of the read
+     * @return the result of the memory access
+     */
+    @Operation(opcode = Opcode.READ_POINTER)
+    public abstract byte readByte(WordBase offset, LocationIdentity locationIdentity);
+
+    /**
+     * Reads the memory at address {@code (this + offset)}. Both the base address and offset are in
+     * bytes.
+     * <p>
+     * The offset is always treated as a {@link Signed} value. However, the static type is
+     * {@link WordBase} to avoid the frequent casts to of {@link Unsigned} values (where the caller
+     * knows that the highest-order bit of the unsigned value is never used).
+     *
+     * @param offset the signed offset for the memory access
+     * @param locationIdentity the identity of the read
+     * @return the result of the memory access
+     */
+    @Operation(opcode = Opcode.READ_POINTER)
+    public abstract char readChar(WordBase offset, LocationIdentity locationIdentity);
+
+    /**
+     * Reads the memory at address {@code (this + offset)}. Both the base address and offset are in
+     * bytes.
+     * <p>
+     * The offset is always treated as a {@link Signed} value. However, the static type is
+     * {@link WordBase} to avoid the frequent casts to of {@link Unsigned} values (where the caller
+     * knows that the highest-order bit of the unsigned value is never used).
+     *
+     * @param offset the signed offset for the memory access
+     * @param locationIdentity the identity of the read
+     * @return the result of the memory access
+     */
+    @Operation(opcode = Opcode.READ_POINTER)
+    public abstract short readShort(WordBase offset, LocationIdentity locationIdentity);
+
+    /**
+     * Reads the memory at address {@code (this + offset)}. Both the base address and offset are in
+     * bytes.
+     * <p>
+     * The offset is always treated as a {@link Signed} value. However, the static type is
+     * {@link WordBase} to avoid the frequent casts to of {@link Unsigned} values (where the caller
+     * knows that the highest-order bit of the unsigned value is never used).
+     *
+     * @param offset the signed offset for the memory access
+     * @param locationIdentity the identity of the read
+     * @return the result of the memory access
+     */
+    @Operation(opcode = Opcode.READ_POINTER)
+    public abstract int readInt(WordBase offset, LocationIdentity locationIdentity);
+
+    /**
+     * Reads the memory at address {@code (this + offset)}. Both the base address and offset are in
+     * bytes.
+     * <p>
+     * The offset is always treated as a {@link Signed} value. However, the static type is
+     * {@link WordBase} to avoid the frequent casts to of {@link Unsigned} values (where the caller
+     * knows that the highest-order bit of the unsigned value is never used).
+     *
+     * @param offset the signed offset for the memory access
+     * @param locationIdentity the identity of the read
+     * @return the result of the memory access
+     */
+    @Operation(opcode = Opcode.READ_POINTER)
+    public abstract long readLong(WordBase offset, LocationIdentity locationIdentity);
+
+    /**
+     * Reads the memory at address {@code (this + offset)}. Both the base address and offset are in
+     * bytes.
+     * <p>
+     * The offset is always treated as a {@link Signed} value. However, the static type is
+     * {@link WordBase} to avoid the frequent casts to of {@link Unsigned} values (where the caller
+     * knows that the highest-order bit of the unsigned value is never used).
+     *
+     * @param offset the signed offset for the memory access
+     * @param locationIdentity the identity of the read
+     * @return the result of the memory access
+     */
+    @Operation(opcode = Opcode.READ_POINTER)
+    public abstract float readFloat(WordBase offset, LocationIdentity locationIdentity);
+
+    /**
+     * Reads the memory at address {@code (this + offset)}. Both the base address and offset are in
+     * bytes.
+     * <p>
+     * The offset is always treated as a {@link Signed} value. However, the static type is
+     * {@link WordBase} to avoid the frequent casts to of {@link Unsigned} values (where the caller
+     * knows that the highest-order bit of the unsigned value is never used).
+     *
+     * @param offset the signed offset for the memory access
+     * @param locationIdentity the identity of the read
+     * @return the result of the memory access
+     */
+    @Operation(opcode = Opcode.READ_POINTER)
+    public abstract double readDouble(WordBase offset, LocationIdentity locationIdentity);
+
+    /**
+     * Reads the memory at address {@code (this + offset)}. Both the base address and offset are in
+     * bytes.
+     * <p>
+     * The offset is always treated as a {@link Signed} value. However, the static type is
+     * {@link WordBase} to avoid the frequent casts to of {@link Unsigned} values (where the caller
+     * knows that the highest-order bit of the unsigned value is never used).
+     *
+     * @param offset the signed offset for the memory access
+     * @param locationIdentity the identity of the read
+     * @return the result of the memory access
+     */
+    @Operation(opcode = Opcode.READ_POINTER)
+    public abstract Word readWord(WordBase offset, LocationIdentity locationIdentity);
+
+    /**
+     * Reads the memory at address {@code (this + offset)}. Both the base address and offset are in
+     * bytes.
+     * <p>
+     * The offset is always treated as a {@link Signed} value. However, the static type is
+     * {@link WordBase} to avoid the frequent casts to of {@link Unsigned} values (where the caller
+     * knows that the highest-order bit of the unsigned value is never used).
+     *
+     * @param offset the signed offset for the memory access
+     * @param locationIdentity the identity of the read
+     * @return the result of the memory access
+     */
+    @Operation(opcode = Opcode.READ_POINTER)
+    public abstract Object readObject(WordBase offset, LocationIdentity locationIdentity);
+
+    /**
+     * Reads the memory at address {@code (this + offset)}. Both the base address and offset are in
+     * bytes.
+     *
+     * @param offset the signed offset for the memory access
+     * @param locationIdentity the identity of the read
+     * @return the result of the memory access
+     */
+    @Operation(opcode = Opcode.READ_POINTER)
+    public abstract byte readByte(int offset, LocationIdentity locationIdentity);
+
+    /**
+     * Reads the memory at address {@code (this + offset)}. Both the base address and offset are in
+     * bytes.
+     *
+     * @param offset the signed offset for the memory access
+     * @param locationIdentity the identity of the read
+     * @return the result of the memory access
+     */
+    @Operation(opcode = Opcode.READ_POINTER)
+    public abstract char readChar(int offset, LocationIdentity locationIdentity);
+
+    /**
+     * Reads the memory at address {@code (this + offset)}. Both the base address and offset are in
+     * bytes.
+     *
+     * @param offset the signed offset for the memory access
+     * @param locationIdentity the identity of the read
+     * @return the result of the memory access
+     */
+    @Operation(opcode = Opcode.READ_POINTER)
+    public abstract short readShort(int offset, LocationIdentity locationIdentity);
+
+    /**
+     * Reads the memory at address {@code (this + offset)}. Both the base address and offset are in
+     * bytes.
+     *
+     * @param offset the signed offset for the memory access
+     * @param locationIdentity the identity of the read
+     * @return the result of the memory access
+     */
+    @Operation(opcode = Opcode.READ_POINTER)
+    public abstract int readInt(int offset, LocationIdentity locationIdentity);
+
+    /**
+     * Reads the memory at address {@code (this + offset)}. Both the base address and offset are in
+     * bytes.
+     *
+     * @param offset the signed offset for the memory access
+     * @param locationIdentity the identity of the read
+     * @return the result of the memory access
+     */
+    @Operation(opcode = Opcode.READ_POINTER)
+    public abstract long readLong(int offset, LocationIdentity locationIdentity);
+
+    /**
+     * Reads the memory at address {@code (this + offset)}. Both the base address and offset are in
+     * bytes.
+     *
+     * @param offset the signed offset for the memory access
+     * @param locationIdentity the identity of the read
+     * @return the result of the memory access
+     */
+    @Operation(opcode = Opcode.READ_POINTER)
+    public abstract float readFloat(int offset, LocationIdentity locationIdentity);
+
+    /**
+     * Reads the memory at address {@code (this + offset)}. Both the base address and offset are in
+     * bytes.
+     *
+     * @param offset the signed offset for the memory access
+     * @param locationIdentity the identity of the read
+     * @return the result of the memory access
+     */
+    @Operation(opcode = Opcode.READ_POINTER)
+    public abstract double readDouble(int offset, LocationIdentity locationIdentity);
+
+    /**
+     * Reads the memory at address {@code (this + offset)}. Both the base address and offset are in
+     * bytes.
+     *
+     * @param offset the signed offset for the memory access
+     * @param locationIdentity the identity of the read
+     * @return the result of the memory access
+     */
+    @Operation(opcode = Opcode.READ_POINTER)
+    public abstract Word readWord(int offset, LocationIdentity locationIdentity);
+
+    /**
+     * Reads the memory at address {@code (this + offset)}. Both the base address and offset are in
+     * bytes.
+     *
+     * @param offset the signed offset for the memory access
+     * @param locationIdentity the identity of the read
+     * @return the result of the memory access
+     */
+    @Operation(opcode = Opcode.READ_POINTER)
+    public abstract Object readObject(int offset, LocationIdentity locationIdentity);
+
+    /**
+     * Writes the memory at address {@code (this + offset)}. Both the base address and offset are in
+     * bytes.
+     * <p>
+     * The offset is always treated as a {@link Signed} value. However, the static type is
+     * {@link WordBase} to avoid the frequent casts to of {@link Unsigned} values (where the caller
+     * knows that the highest-order bit of the unsigned value is never used).
+     *
+     * @param offset the signed offset for the memory access
+     * @param locationIdentity the identity of the write
+     * @param val the value to be written to memory
+     */
+    @Operation(opcode = Opcode.WRITE_POINTER)
+    public abstract void writeByte(WordBase offset, byte val, LocationIdentity locationIdentity);
+
+    /**
+     * Writes the memory at address {@code (this + offset)}. Both the base address and offset are in
+     * bytes.
+     * <p>
+     * The offset is always treated as a {@link Signed} value. However, the static type is
+     * {@link WordBase} to avoid the frequent casts to of {@link Unsigned} values (where the caller
+     * knows that the highest-order bit of the unsigned value is never used).
+     *
+     * @param offset the signed offset for the memory access
+     * @param locationIdentity the identity of the write
+     * @param val the value to be written to memory
+     */
+    @Operation(opcode = Opcode.WRITE_POINTER)
+    public abstract void writeChar(WordBase offset, char val, LocationIdentity locationIdentity);
+
+    /**
+     * Writes the memory at address {@code (this + offset)}. Both the base address and offset are in
+     * bytes.
+     * <p>
+     * The offset is always treated as a {@link Signed} value. However, the static type is
+     * {@link WordBase} to avoid the frequent casts to of {@link Unsigned} values (where the caller
+     * knows that the highest-order bit of the unsigned value is never used).
+     *
+     * @param offset the signed offset for the memory access
+     * @param locationIdentity the identity of the write
+     * @param val the value to be written to memory
+     */
+    @Operation(opcode = Opcode.WRITE_POINTER)
+    public abstract void writeShort(WordBase offset, short val, LocationIdentity locationIdentity);
+
+    /**
+     * Writes the memory at address {@code (this + offset)}. Both the base address and offset are in
+     * bytes.
+     * <p>
+     * The offset is always treated as a {@link Signed} value. However, the static type is
+     * {@link WordBase} to avoid the frequent casts to of {@link Unsigned} values (where the caller
+     * knows that the highest-order bit of the unsigned value is never used).
+     *
+     * @param offset the signed offset for the memory access
+     * @param locationIdentity the identity of the write
+     * @param val the value to be written to memory
+     */
+    @Operation(opcode = Opcode.WRITE_POINTER)
+    public abstract void writeInt(WordBase offset, int val, LocationIdentity locationIdentity);
+
+    /**
+     * Writes the memory at address {@code (this + offset)}. Both the base address and offset are in
+     * bytes.
+     * <p>
+     * The offset is always treated as a {@link Signed} value. However, the static type is
+     * {@link WordBase} to avoid the frequent casts to of {@link Unsigned} values (where the caller
+     * knows that the highest-order bit of the unsigned value is never used).
+     *
+     * @param offset the signed offset for the memory access
+     * @param locationIdentity the identity of the write
+     * @param val the value to be written to memory
+     */
+    @Operation(opcode = Opcode.WRITE_POINTER)
+    public abstract void writeLong(WordBase offset, long val, LocationIdentity locationIdentity);
+
+    /**
+     * Writes the memory at address {@code (this + offset)}. Both the base address and offset are in
+     * bytes.
+     * <p>
+     * The offset is always treated as a {@link Signed} value. However, the static type is
+     * {@link WordBase} to avoid the frequent casts to of {@link Unsigned} values (where the caller
+     * knows that the highest-order bit of the unsigned value is never used).
+     *
+     * @param offset the signed offset for the memory access
+     * @param locationIdentity the identity of the write
+     * @param val the value to be written to memory
+     */
+    @Operation(opcode = Opcode.WRITE_POINTER)
+    public abstract void writeFloat(WordBase offset, float val, LocationIdentity locationIdentity);
+
+    /**
+     * Writes the memory at address {@code (this + offset)}. Both the base address and offset are in
+     * bytes.
+     * <p>
+     * The offset is always treated as a {@link Signed} value. However, the static type is
+     * {@link WordBase} to avoid the frequent casts to of {@link Unsigned} values (where the caller
+     * knows that the highest-order bit of the unsigned value is never used).
+     *
+     * @param offset the signed offset for the memory access
+     * @param locationIdentity the identity of the write
+     * @param val the value to be written to memory
+     */
+    @Operation(opcode = Opcode.WRITE_POINTER)
+    public abstract void writeDouble(WordBase offset, double val, LocationIdentity locationIdentity);
+
+    /**
+     * Writes the memory at address {@code (this + offset)}. Both the base address and offset are in
+     * bytes.
+     * <p>
+     * The offset is always treated as a {@link Signed} value. However, the static type is
+     * {@link WordBase} to avoid the frequent casts to of {@link Unsigned} values (where the caller
+     * knows that the highest-order bit of the unsigned value is never used).
+     *
+     * @param offset the signed offset for the memory access
+     * @param locationIdentity the identity of the write
+     * @param val the value to be written to memory
+     */
+    @Operation(opcode = Opcode.WRITE_POINTER)
+    public abstract void writeWord(WordBase offset, WordBase val, LocationIdentity locationIdentity);
+
+    /**
+     * Initializes the memory at address {@code (this + offset)}. Both the base address and offset
+     * are in bytes. The memory must be uninitialized or zero prior to this operation.
+     * <p>
+     * The offset is always treated as a {@link Signed} value. However, the static type is
+     * {@link WordBase} to avoid the frequent casts to of {@link Unsigned} values (where the caller
+     * knows that the highest-order bit of the unsigned value is never used).
+     *
+     * @param offset the signed offset for the memory access
+     * @param locationIdentity the identity of the write
+     * @param val the value to be written to memory
+     */
+    @Operation(opcode = Opcode.INITIALIZE)
+    public abstract void initializeLong(WordBase offset, long val, LocationIdentity locationIdentity);
+
+    /**
+     * Writes the memory at address {@code (this + offset)}. Both the base address and offset are in
+     * bytes.
+     * <p>
+     * The offset is always treated as a {@link Signed} value. However, the static type is
+     * {@link WordBase} to avoid the frequent casts to of {@link Unsigned} values (where the caller
+     * knows that the highest-order bit of the unsigned value is never used).
+     *
+     * @param offset the signed offset for the memory access
+     * @param locationIdentity the identity of the write
+     * @param val the value to be written to memory
+     */
+    @Operation(opcode = Opcode.WRITE_POINTER)
+    public abstract void writeObject(WordBase offset, Object val, LocationIdentity locationIdentity);
+
+    /**
+     * Writes the memory at address {@code (this + offset)}. Both the base address and offset are in
+     * bytes.
+     *
+     * @param offset the signed offset for the memory access
+     * @param locationIdentity the identity of the write
+     * @param val the value to be written to memory
+     */
+    @Operation(opcode = Opcode.WRITE_POINTER)
+    public abstract void writeByte(int offset, byte val, LocationIdentity locationIdentity);
+
+    /**
+     * Writes the memory at address {@code (this + offset)}. Both the base address and offset are in
+     * bytes.
+     *
+     * @param offset the signed offset for the memory access
+     * @param locationIdentity the identity of the write
+     * @param val the value to be written to memory
+     */
+    @Operation(opcode = Opcode.WRITE_POINTER)
+    public abstract void writeChar(int offset, char val, LocationIdentity locationIdentity);
+
+    /**
+     * Writes the memory at address {@code (this + offset)}. Both the base address and offset are in
+     * bytes.
+     *
+     * @param offset the signed offset for the memory access
+     * @param locationIdentity the identity of the write
+     * @param val the value to be written to memory
+     */
+    @Operation(opcode = Opcode.WRITE_POINTER)
+    public abstract void writeShort(int offset, short val, LocationIdentity locationIdentity);
+
+    /**
+     * Writes the memory at address {@code (this + offset)}. Both the base address and offset are in
+     * bytes.
+     *
+     * @param offset the signed offset for the memory access
+     * @param locationIdentity the identity of the write
+     * @param val the value to be written to memory
+     */
+    @Operation(opcode = Opcode.WRITE_POINTER)
+    public abstract void writeInt(int offset, int val, LocationIdentity locationIdentity);
+
+    /**
+     * Writes the memory at address {@code (this + offset)}. Both the base address and offset are in
+     * bytes.
+     *
+     * @param offset the signed offset for the memory access
+     * @param locationIdentity the identity of the write
+     * @param val the value to be written to memory
+     */
+    @Operation(opcode = Opcode.WRITE_POINTER)
+    public abstract void writeLong(int offset, long val, LocationIdentity locationIdentity);
+
+    /**
+     * Writes the memory at address {@code (this + offset)}. Both the base address and offset are in
+     * bytes.
+     *
+     * @param offset the signed offset for the memory access
+     * @param locationIdentity the identity of the write
+     * @param val the value to be written to memory
+     */
+    @Operation(opcode = Opcode.WRITE_POINTER)
+    public abstract void writeFloat(int offset, float val, LocationIdentity locationIdentity);
+
+    /**
+     * Writes the memory at address {@code (this + offset)}. Both the base address and offset are in
+     * bytes.
+     *
+     * @param offset the signed offset for the memory access
+     * @param locationIdentity the identity of the write
+     * @param val the value to be written to memory
+     */
+    @Operation(opcode = Opcode.WRITE_POINTER)
+    public abstract void writeDouble(int offset, double val, LocationIdentity locationIdentity);
+
+    /**
+     * Writes the memory at address {@code (this + offset)}. Both the base address and offset are in
+     * bytes.
+     *
+     * @param offset the signed offset for the memory access
+     * @param locationIdentity the identity of the write
+     * @param val the value to be written to memory
+     */
+    @Operation(opcode = Opcode.WRITE_POINTER)
+    public abstract void writeWord(int offset, WordBase val, LocationIdentity locationIdentity);
+
+    /**
+     * Initializes the memory at address {@code (this + offset)}. Both the base address and offset
+     * are in bytes. The memory must be uninitialized or zero prior to this operation.
+     *
+     * @param offset the signed offset for the memory access
+     * @param locationIdentity the identity of the write
+     * @param val the value to be written to memory
+     */
+    @Operation(opcode = Opcode.INITIALIZE)
+    public abstract void initializeLong(int offset, long val, LocationIdentity locationIdentity);
+
+    /**
+     * Writes the memory at address {@code (this + offset)}. Both the base address and offset are in
+     * bytes.
+     *
+     * @param offset the signed offset for the memory access
+     * @param locationIdentity the identity of the write
+     * @param val the value to be written to memory
+     */
+    @Operation(opcode = Opcode.WRITE_POINTER)
+    public abstract void writeObject(int offset, Object val, LocationIdentity locationIdentity);
+
+    /**
+     * Reads the memory at address {@code (this + offset)}. Both the base address and offset are in
+     * bytes.
+     * <p>
+     * The offset is always treated as a {@link Signed} value. However, the static type is
+     * {@link WordBase} to avoid the frequent casts to of {@link Unsigned} values (where the caller
+     * knows that the highest-order bit of the unsigned value is never used).
+     *
+     * @param offset the signed offset for the memory access
+     * @return the result of the memory access
+     */
+    @Operation(opcode = Opcode.READ_POINTER)
+    public abstract byte readByte(WordBase offset);
+
+    /**
+     * Reads the memory at address {@code (this + offset)}. Both the base address and offset are in
+     * bytes.
+     * <p>
+     * The offset is always treated as a {@link Signed} value. However, the static type is
+     * {@link WordBase} to avoid the frequent casts to of {@link Unsigned} values (where the caller
+     * knows that the highest-order bit of the unsigned value is never used).
+     *
+     * @param offset the signed offset for the memory access
+     * @return the result of the memory access
+     */
+    @Operation(opcode = Opcode.READ_POINTER)
+    public abstract char readChar(WordBase offset);
+
+    /**
+     * Reads the memory at address {@code (this + offset)}. Both the base address and offset are in
+     * bytes.
+     * <p>
+     * The offset is always treated as a {@link Signed} value. However, the static type is
+     * {@link WordBase} to avoid the frequent casts to of {@link Unsigned} values (where the caller
+     * knows that the highest-order bit of the unsigned value is never used).
+     *
+     * @param offset the signed offset for the memory access
+     * @return the result of the memory access
+     */
+    @Operation(opcode = Opcode.READ_POINTER)
+    public abstract short readShort(WordBase offset);
+
+    /**
+     * Reads the memory at address {@code (this + offset)}. Both the base address and offset are in
+     * bytes.
+     * <p>
+     * The offset is always treated as a {@link Signed} value. However, the static type is
+     * {@link WordBase} to avoid the frequent casts to of {@link Unsigned} values (where the caller
+     * knows that the highest-order bit of the unsigned value is never used).
+     *
+     * @param offset the signed offset for the memory access
+     * @return the result of the memory access
+     */
+    @Operation(opcode = Opcode.READ_POINTER)
+    public abstract int readInt(WordBase offset);
+
+    /**
+     * Reads the memory at address {@code (this + offset)}. Both the base address and offset are in
+     * bytes.
+     * <p>
+     * The offset is always treated as a {@link Signed} value. However, the static type is
+     * {@link WordBase} to avoid the frequent casts to of {@link Unsigned} values (where the caller
+     * knows that the highest-order bit of the unsigned value is never used).
+     *
+     * @param offset the signed offset for the memory access
+     * @return the result of the memory access
+     */
+    @Operation(opcode = Opcode.READ_POINTER)
+    public abstract long readLong(WordBase offset);
+
+    /**
+     * Reads the memory at address {@code (this + offset)}. Both the base address and offset are in
+     * bytes.
+     * <p>
+     * The offset is always treated as a {@link Signed} value. However, the static type is
+     * {@link WordBase} to avoid the frequent casts to of {@link Unsigned} values (where the caller
+     * knows that the highest-order bit of the unsigned value is never used).
+     *
+     * @param offset the signed offset for the memory access
+     * @return the result of the memory access
+     */
+    @Operation(opcode = Opcode.READ_POINTER)
+    public abstract float readFloat(WordBase offset);
+
+    /**
+     * Reads the memory at address {@code (this + offset)}. Both the base address and offset are in
+     * bytes.
+     * <p>
+     * The offset is always treated as a {@link Signed} value. However, the static type is
+     * {@link WordBase} to avoid the frequent casts to of {@link Unsigned} values (where the caller
+     * knows that the highest-order bit of the unsigned value is never used).
+     *
+     * @param offset the signed offset for the memory access
+     * @return the result of the memory access
+     */
+    @Operation(opcode = Opcode.READ_POINTER)
+    public abstract double readDouble(WordBase offset);
+
+    /**
+     * Reads the memory at address {@code (this + offset)}. Both the base address and offset are in
+     * bytes.
+     * <p>
+     * The offset is always treated as a {@link Signed} value. However, the static type is
+     * {@link WordBase} to avoid the frequent casts to of {@link Unsigned} values (where the caller
+     * knows that the highest-order bit of the unsigned value is never used).
+     *
+     * @param offset the signed offset for the memory access
+     * @return the result of the memory access
+     */
+    @Operation(opcode = Opcode.READ_POINTER)
+    public abstract Word readWord(WordBase offset);
+
+    /**
+     * Reads the memory at address {@code (this + offset)}. Both the base address and offset are in
+     * bytes.
+     * <p>
+     * The offset is always treated as a {@link Signed} value. However, the static type is
+     * {@link WordBase} to avoid the frequent casts to of {@link Unsigned} values (where the caller
+     * knows that the highest-order bit of the unsigned value is never used).
+     *
+     * @param offset the signed offset for the memory access
+     * @return the result of the memory access
+     */
+    @Operation(opcode = Opcode.READ_POINTER)
+    public abstract Object readObject(WordBase offset);
+
+    /**
+     * Reads the memory at address {@code (this + offset)}. This access will decompress the oop if
+     * the VM uses compressed oops, and it can be parameterized to allow read barriers (G1 referent
+     * field).
+     * <p>
+     * The offset is always treated as a {@link Signed} value. However, the static type is
+     * {@link WordBase} to avoid the frequent casts to of {@link Unsigned} values (where the caller
+     * knows that the highest-order bit of the unsigned value is never used).
+     *
+     * @param offset the signed offset for the memory access
+     * @param barrierType the type of the read barrier to be added
+     * @return the result of the memory access
+     */
+    @Operation(opcode = Opcode.READ_POINTER)
+    public abstract Object readObject(WordBase offset, BarrierType barrierType);
+
+    /**
+     * Reads the memory at address {@code (this + offset)}. Both the base address and offset are in
+     * bytes.
+     *
+     * @param offset the signed offset for the memory access
+     * @return the result of the memory access
+     */
+    @Operation(opcode = Opcode.READ_POINTER)
+    public abstract byte readByte(int offset);
+
+    /**
+     * Reads the memory at address {@code (this + offset)}. Both the base address and offset are in
+     * bytes.
+     *
+     * @param offset the signed offset for the memory access
+     * @return the result of the memory access
+     */
+    @Operation(opcode = Opcode.READ_POINTER)
+    public abstract char readChar(int offset);
+
+    /**
+     * Reads the memory at address {@code (this + offset)}. Both the base address and offset are in
+     * bytes.
+     *
+     * @param offset the signed offset for the memory access
+     * @return the result of the memory access
+     */
+    @Operation(opcode = Opcode.READ_POINTER)
+    public abstract short readShort(int offset);
+
+    /**
+     * Reads the memory at address {@code (this + offset)}. Both the base address and offset are in
+     * bytes.
+     *
+     * @param offset the signed offset for the memory access
+     * @return the result of the memory access
+     */
+    @Operation(opcode = Opcode.READ_POINTER)
+    public abstract int readInt(int offset);
+
+    /**
+     * Reads the memory at address {@code (this + offset)}. Both the base address and offset are in
+     * bytes.
+     *
+     * @param offset the signed offset for the memory access
+     * @return the result of the memory access
+     */
+    @Operation(opcode = Opcode.READ_POINTER)
+    public abstract long readLong(int offset);
+
+    /**
+     * Reads the memory at address {@code (this + offset)}. Both the base address and offset are in
+     * bytes.
+     *
+     * @param offset the signed offset for the memory access
+     * @return the result of the memory access
+     */
+    @Operation(opcode = Opcode.READ_POINTER)
+    public abstract float readFloat(int offset);
+
+    /**
+     * Reads the memory at address {@code (this + offset)}. Both the base address and offset are in
+     * bytes.
+     *
+     * @param offset the signed offset for the memory access
+     * @return the result of the memory access
+     */
+    @Operation(opcode = Opcode.READ_POINTER)
+    public abstract double readDouble(int offset);
+
+    /**
+     * Reads the memory at address {@code (this + offset)}. Both the base address and offset are in
+     * bytes.
+     *
+     * @param offset the signed offset for the memory access
+     * @return the result of the memory access
+     */
+    @Operation(opcode = Opcode.READ_POINTER)
+    public abstract Word readWord(int offset);
+
+    /**
+     * Reads the memory at address {@code (this + offset)}. Both the base address and offset are in
+     * bytes.
+     *
+     * @param offset the signed offset for the memory access
+     * @return the result of the memory access
+     */
+    @Operation(opcode = Opcode.READ_POINTER)
+    public abstract Object readObject(int offset);
+
+    /**
+     * Reads the memory at address {@code (this + offset)}. This access will decompress the oop if
+     * the VM uses compressed oops, and it can be parameterized to allow read barriers (G1 referent
+     * field).
+     *
+     * @param offset the signed offset for the memory access
+     * @param barrierType the type of the read barrier to be added
+     * @return the result of the memory access
+     */
+    @Operation(opcode = Opcode.READ_POINTER)
+    public abstract Object readObject(int offset, BarrierType barrierType);
+
+    /**
+     * Writes the memory at address {@code (this + offset)}. Both the base address and offset are in
+     * bytes.
+     * <p>
+     * The offset is always treated as a {@link Signed} value. However, the static type is
+     * {@link WordBase} to avoid the frequent casts to of {@link Unsigned} values (where the caller
+     * knows that the highest-order bit of the unsigned value is never used).
+     *
+     * @param offset the signed offset for the memory access
+     * @param val the value to be written to memory
+     */
+    @Operation(opcode = Opcode.WRITE_POINTER)
+    public abstract void writeByte(WordBase offset, byte val);
+
+    /**
+     * Writes the memory at address {@code (this + offset)}. Both the base address and offset are in
+     * bytes.
+     * <p>
+     * The offset is always treated as a {@link Signed} value. However, the static type is
+     * {@link WordBase} to avoid the frequent casts to of {@link Unsigned} values (where the caller
+     * knows that the highest-order bit of the unsigned value is never used).
+     *
+     * @param offset the signed offset for the memory access
+     * @param val the value to be written to memory
+     */
+    @Operation(opcode = Opcode.WRITE_POINTER)
+    public abstract void writeChar(WordBase offset, char val);
+
+    /**
+     * Writes the memory at address {@code (this + offset)}. Both the base address and offset are in
+     * bytes.
+     * <p>
+     * The offset is always treated as a {@link Signed} value. However, the static type is
+     * {@link WordBase} to avoid the frequent casts to of {@link Unsigned} values (where the caller
+     * knows that the highest-order bit of the unsigned value is never used).
+     *
+     * @param offset the signed offset for the memory access
+     * @param val the value to be written to memory
+     */
+    @Operation(opcode = Opcode.WRITE_POINTER)
+    public abstract void writeShort(WordBase offset, short val);
+
+    /**
+     * Writes the memory at address {@code (this + offset)}. Both the base address and offset are in
+     * bytes.
+     * <p>
+     * The offset is always treated as a {@link Signed} value. However, the static type is
+     * {@link WordBase} to avoid the frequent casts to of {@link Unsigned} values (where the caller
+     * knows that the highest-order bit of the unsigned value is never used).
+     *
+     * @param offset the signed offset for the memory access
+     * @param val the value to be written to memory
+     */
+    @Operation(opcode = Opcode.WRITE_POINTER)
+    public abstract void writeInt(WordBase offset, int val);
+
+    /**
+     * Writes the memory at address {@code (this + offset)}. Both the base address and offset are in
+     * bytes.
+     * <p>
+     * The offset is always treated as a {@link Signed} value. However, the static type is
+     * {@link WordBase} to avoid the frequent casts to of {@link Unsigned} values (where the caller
+     * knows that the highest-order bit of the unsigned value is never used).
+     *
+     * @param offset the signed offset for the memory access
+     * @param val the value to be written to memory
+     */
+    @Operation(opcode = Opcode.WRITE_POINTER)
+    public abstract void writeLong(WordBase offset, long val);
+
+    /**
+     * Writes the memory at address {@code (this + offset)}. Both the base address and offset are in
+     * bytes.
+     * <p>
+     * The offset is always treated as a {@link Signed} value. However, the static type is
+     * {@link WordBase} to avoid the frequent casts to of {@link Unsigned} values (where the caller
+     * knows that the highest-order bit of the unsigned value is never used).
+     *
+     * @param offset the signed offset for the memory access
+     * @param val the value to be written to memory
+     */
+    @Operation(opcode = Opcode.WRITE_POINTER)
+    public abstract void writeFloat(WordBase offset, float val);
+
+    /**
+     * Writes the memory at address {@code (this + offset)}. Both the base address and offset are in
+     * bytes.
+     * <p>
+     * The offset is always treated as a {@link Signed} value. However, the static type is
+     * {@link WordBase} to avoid the frequent casts to of {@link Unsigned} values (where the caller
+     * knows that the highest-order bit of the unsigned value is never used).
+     *
+     * @param offset the signed offset for the memory access
+     * @param val the value to be written to memory
+     */
+    @Operation(opcode = Opcode.WRITE_POINTER)
+    public abstract void writeDouble(WordBase offset, double val);
+
+    /**
+     * Writes the memory at address {@code (this + offset)}. Both the base address and offset are in
+     * bytes.
+     * <p>
+     * The offset is always treated as a {@link Signed} value. However, the static type is
+     * {@link WordBase} to avoid the frequent casts to of {@link Unsigned} values (where the caller
+     * knows that the highest-order bit of the unsigned value is never used).
+     *
+     * @param offset the signed offset for the memory access
+     * @param val the value to be written to memory
+     */
+    @Operation(opcode = Opcode.WRITE_POINTER)
+    public abstract void writeWord(WordBase offset, WordBase val);
+
+    /**
+     * Writes the memory at address {@code (this + offset)}. Both the base address and offset are in
+     * bytes.
+     * <p>
+     * The offset is always treated as a {@link Signed} value. However, the static type is
+     * {@link WordBase} to avoid the frequent casts to of {@link Unsigned} values (where the caller
+     * knows that the highest-order bit of the unsigned value is never used).
+     *
+     * @param offset the signed offset for the memory access
+     * @param val the value to be written to memory
+     */
+    @Operation(opcode = Opcode.WRITE_POINTER)
+    public abstract void writeObject(WordBase offset, Object val);
+
+    /**
+     * Writes the memory at address {@code (this + offset)}. Both the base address and offset are in
+     * bytes.
+     *
+     * @param offset the signed offset for the memory access
+     * @param val the value to be written to memory
+     */
+    @Operation(opcode = Opcode.WRITE_POINTER)
+    public abstract void writeByte(int offset, byte val);
+
+    /**
+     * Writes the memory at address {@code (this + offset)}. Both the base address and offset are in
+     * bytes.
+     *
+     * @param offset the signed offset for the memory access
+     * @param val the value to be written to memory
+     */
+    @Operation(opcode = Opcode.WRITE_POINTER)
+    public abstract void writeChar(int offset, char val);
+
+    /**
+     * Writes the memory at address {@code (this + offset)}. Both the base address and offset are in
+     * bytes.
+     *
+     * @param offset the signed offset for the memory access
+     * @param val the value to be written to memory
+     */
+    @Operation(opcode = Opcode.WRITE_POINTER)
+    public abstract void writeShort(int offset, short val);
+
+    /**
+     * Writes the memory at address {@code (this + offset)}. Both the base address and offset are in
+     * bytes.
+     *
+     * @param offset the signed offset for the memory access
+     * @param val the value to be written to memory
+     */
+    @Operation(opcode = Opcode.WRITE_POINTER)
+    public abstract void writeInt(int offset, int val);
+
+    /**
+     * Writes the memory at address {@code (this + offset)}. Both the base address and offset are in
+     * bytes.
+     *
+     * @param offset the signed offset for the memory access
+     * @param val the value to be written to memory
+     */
+    @Operation(opcode = Opcode.WRITE_POINTER)
+    public abstract void writeLong(int offset, long val);
+
+    /**
+     * Writes the memory at address {@code (this + offset)}. Both the base address and offset are in
+     * bytes.
+     *
+     * @param offset the signed offset for the memory access
+     * @param val the value to be written to memory
+     */
+    @Operation(opcode = Opcode.WRITE_POINTER)
+    public abstract void writeFloat(int offset, float val);
+
+    /**
+     * Writes the memory at address {@code (this + offset)}. Both the base address and offset are in
+     * bytes.
+     *
+     * @param offset the signed offset for the memory access
+     * @param val the value to be written to memory
+     */
+    @Operation(opcode = Opcode.WRITE_POINTER)
+    public abstract void writeDouble(int offset, double val);
+
+    /**
+     * Writes the memory at address {@code (this + offset)}. Both the base address and offset are in
+     * bytes.
+     *
+     * @param offset the signed offset for the memory access
+     * @param val the value to be written to memory
+     */
+    @Operation(opcode = Opcode.WRITE_POINTER)
+    public abstract void writeWord(int offset, WordBase val);
+
+    /**
+     * Writes the memory at address {@code (this + offset)}. Both the base address and offset are in
+     * bytes.
+     *
+     * @param offset the signed offset for the memory access
+     * @param val the value to be written to memory
+     */
+    @Operation(opcode = Opcode.WRITE_POINTER)
+    public abstract void writeObject(int offset, Object val);
+}