--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/graal/Compiler/src/com/sun/c1x/ir/Throw.java	Wed Apr 27 11:43:22 2011 +0200
@@ -0,0 +1,92 @@
+/*
+ * Copyright (c) 2009, 2011, 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 com.sun.c1x.debug.*;
+import com.sun.c1x.value.*;
+import com.sun.cri.ci.*;
+
+/**
+ * The {@code Throw} instruction represents a throw of an exception.
+ *
+ * @author Ben L. Titzer
+ */
+public final class Throw extends BlockEnd {
+
+    Value exception;
+
+    FrameState stateBefore;
+
+    /**
+     * Creates a new Throw instruction.
+     * @param exception the instruction that generates the exception to throw
+     * @param stateAfter the state before the exception is thrown but after the exception object has been popped
+     * @param isSafepoint {@code true} if this instruction is a safepoint instruction
+     */
+    public Throw(Value exception, FrameState stateAfter, boolean isSafepoint) {
+        super(CiKind.Illegal, null, isSafepoint);
+        this.stateBefore = stateAfter;
+        this.exception = exception;
+    }
+
+    /**
+     * Gets the instruction which produces the exception to throw.
+     * @return the instruction producing the exception
+     */
+    public Value exception() {
+        return exception;
+    }
+
+    /**
+     * Returns the state before this throw would occur.
+     * @return the state before the throw
+     */
+    @Override
+    public FrameState stateBefore() {
+        return stateBefore;
+    }
+
+    /**
+     * Checks whether this instruction can trap.
+     * @return {@code true} because this instruction definitely throws an exception!
+     */
+    @Override
+    public boolean canTrap() {
+        return true;
+    }
+
+    @Override
+    public void inputValuesDo(ValueClosure closure) {
+        exception = closure.apply(exception);
+    }
+
+    @Override
+    public void accept(ValueVisitor v) {
+        v.visitThrow(this);
+    }
+
+    @Override
+    public void print(LogStream out) {
+        out.print("throw ").print(exception());
+    }
+}