--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/graal/com.oracle.jvmci.code/src/com/oracle/jvmci/code/TargetDescription.java	Wed May 27 00:36:16 2015 +0200
@@ -0,0 +1,143 @@
+/*
+ * Copyright (c) 2009, 2014, 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 com.oracle.jvmci.code;
+
+import com.oracle.jvmci.meta.Kind;
+import com.oracle.jvmci.meta.PlatformKind;
+import com.oracle.jvmci.meta.LIRKind;
+import static com.oracle.jvmci.meta.MetaUtil.*;
+
+/**
+ * Represents the target machine for a compiler, including the CPU architecture, the size of
+ * pointers and references, alignment of stacks, caches, etc.
+ */
+public abstract class TargetDescription {
+
+    public final Architecture arch;
+
+    /**
+     * Specifies if this is a multi-processor system.
+     */
+    public final boolean isMP;
+
+    /**
+     * Specifies if this target supports encoding objects inline in the machine code.
+     */
+    public final boolean inlineObjects;
+
+    /**
+     * The machine word size on this target.
+     */
+    public final int wordSize;
+
+    /**
+     * The kind to be used for representing raw pointers and CPU registers.
+     */
+    public final Kind wordKind;
+
+    /**
+     * The stack alignment requirement of the platform. For example, from Appendix D of <a
+     * href="http://www.intel.com/Assets/PDF/manual/248966.pdf">Intel 64 and IA-32 Architectures
+     * Optimization Reference Manual</a>:
+     *
+     * <pre>
+     *     "It is important to ensure that the stack frame is aligned to a
+     *      16-byte boundary upon function entry to keep local __m128 data,
+     *      parameters, and XMM register spill locations aligned throughout
+     *      a function invocation."
+     * </pre>
+     */
+    public final int stackAlignment;
+
+    /**
+     * Maximum constant displacement at which a memory access can no longer be an implicit null
+     * check.
+     */
+    public final int implicitNullCheckLimit;
+
+    public TargetDescription(Architecture arch, boolean isMP, int stackAlignment, int implicitNullCheckLimit, boolean inlineObjects) {
+        this.arch = arch;
+        this.isMP = isMP;
+        this.wordSize = arch.getWordSize();
+        this.wordKind = Kind.fromWordSize(wordSize);
+        this.stackAlignment = stackAlignment;
+        this.implicitNullCheckLimit = implicitNullCheckLimit;
+        this.inlineObjects = inlineObjects;
+    }
+
+    @Override
+    public final int hashCode() {
+        throw new UnsupportedOperationException();
+    }
+
+    @Override
+    public final boolean equals(Object obj) {
+        if (this == obj) {
+            return true;
+        }
+        if (obj instanceof TargetDescription) {
+            TargetDescription that = (TargetDescription) obj;
+            // @formatter:off
+            if (this.implicitNullCheckLimit == that.implicitNullCheckLimit &&
+                this.inlineObjects == that.inlineObjects &&
+                this.isMP == that.isMP &&
+                this.stackAlignment == that.stackAlignment &&
+                this.wordKind.equals(that.wordKind) &&
+                this.wordSize == that.wordSize &&
+                this.arch.equals(that.arch)) {
+                return true;
+            }
+            // @formatter:on
+        }
+        return false;
+    }
+
+    @Override
+    public String toString() {
+        return identityHashCodeString(this);
+    }
+
+    public int getSizeInBytes(PlatformKind kind) {
+        return arch.getSizeInBytes(kind);
+    }
+
+    public LIRKind getLIRKind(Kind javaKind) {
+        switch (javaKind) {
+            case Boolean:
+            case Byte:
+            case Short:
+            case Char:
+            case Int:
+            case Long:
+            case Float:
+            case Double:
+                return LIRKind.value(javaKind);
+            case Object:
+                return LIRKind.reference(javaKind);
+            default:
+                return LIRKind.Illegal;
+        }
+    }
+
+    public abstract ReferenceMap createReferenceMap(boolean hasRegisters, int stackSlotCount);
+}