--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/graal/Compiler/src/com/sun/c1x/ir/Info.java	Wed Apr 27 11:43:22 2011 +0200
@@ -0,0 +1,130 @@
+/*
+ * Copyright (c) 2009, 2010, 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.sun.c1x.ir;
+
+import java.util.*;
+
+import com.sun.c1x.value.*;
+import com.sun.cri.ci.*;
+
+/**
+ * This class collects a number of debugging and exception-related information about
+ * an HIR node. Instances of this class can be attached to HIR nodes and contain
+ * the {@link com.sun.cri.ci.CiCodePos code position}, the {@link com.sun.c1x.value.FrameState frame state}
+ * potential exceptions, and exception handlers.
+ *
+ * @author Ben L. Titzer
+ */
+public class Info {
+
+    /**
+     * An enumeration of the possible exceptions or stops that an instruction may generate.
+     */
+    public enum StopType {
+        /**
+         * This instruction may throw {@link ArrayIndexOutOfBoundsException}.
+         */
+        java_lang_ArrayOutOfBoundsException,
+
+        /**
+         * This instruction may throw {@link NullPointerException}.
+         */
+        java_lang_NullPointerException,
+
+        /**
+         * This instruction may throw {@link ClassCastException}.
+         */
+        java_lang_ClassCastException,
+
+        /**
+         * This instruction may throw {@link ArrayStoreException}.
+         */
+        java_lang_ArrayStoreException,
+
+        /**
+         * This instruction may throw {@link ArithmeticException}.
+         */
+        java_lang_ArithmeticException,
+
+        /**
+         * This instruction may throw {@link NegativeArraySizeException}.
+         */
+        java_lang_NegativeArraySizeException,
+
+        /**
+         * This instruction may throw {@link OutOfMemoryError}.
+         */
+        java_lang_OutOfMemoryError,
+
+        /**
+         * This instruction may throw {@link IncompatibleClassChangeError}.
+         */
+        java_lang_IncompatibleClassChangeError,
+
+        /**
+         * This instruction may cause a safepoint.
+         */
+        Safepoint,
+
+        /**
+         * This instruction may throw any exception or cause a safepoint.
+         */
+        Unknown;
+
+        public final int mask = 1 << ordinal();
+
+    }
+
+    public final CiCodePos pos;
+    public final int id;
+    private int stopFlags;
+    private FrameState state;
+    private List<ExceptionHandler> exceptionHandlers;
+
+    public Info(CiCodePos pos, int id, FrameState javaFrameState) {
+        this.pos = pos;
+        this.id = id;
+        this.state = javaFrameState;
+    }
+
+    public FrameState frameState() {
+        return state;
+    }
+
+    public boolean mayStop() {
+        return stopFlags != 0;
+    }
+
+    public boolean mayCauseException() {
+        return (stopFlags & ~StopType.Safepoint.mask) != 0;
+    }
+
+    public void clearStop(StopType stopType) {
+        stopFlags &= ~stopType.mask;
+    }
+
+    public void setStop(StopType stopType) {
+        stopFlags |= stopType.mask;
+    }
+
+}