--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/graal/GraalCompiler/src/com/sun/c1x/debug/IdealGraphPrinterObserver.java	Mon May 16 17:31:53 2011 +0200
@@ -0,0 +1,90 @@
+/*
+ * Copyright (c) 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.debug;
+
+import java.io.*;
+
+import com.oracle.graal.graph.*;
+import com.sun.c1x.*;
+import com.sun.c1x.observer.*;
+import com.sun.c1x.value.*;
+
+/**
+ * Observes compilation events and uses {@link IdealGraphPrinter} to generate a graph representation that can be
+ * inspected with the <a href="http://kenai.com/projects/igv">Ideal Graph Visualizer</a>.
+ * 
+ * @author Peter Hofer
+ */
+public class IdealGraphPrinterObserver implements CompilationObserver {
+
+    private IdealGraphPrinter printer;
+    private OutputStream stream;
+
+    @Override
+    public void compilationStarted(CompilationEvent event) {
+        assert (stream == null && printer == null);
+
+        if (!TTY.isSuppressed()) {
+            String name = event.getMethod().holder().name();
+            name = name.substring(1, name.length() - 1).replace('/', '.');
+            name = name + "." + event.getMethod().name();
+            String filename = name + ".igv.xml";
+            try {
+                stream = new FileOutputStream(filename);
+                printer = new IdealGraphPrinter(stream);
+
+                if (C1XOptions.OmitDOTFrameStates) {
+                    printer.addOmittedClass(FrameState.class);
+                }
+
+                printer.begin(name, name, -1);
+            } catch (IOException e) {
+                e.printStackTrace();
+            }
+        }
+    }
+
+    @Override
+    public void compilationEvent(CompilationEvent event) {
+        if (printer != null && event.getStartBlock() != null) {
+            Graph graph = event.getStartBlock().graph();
+            printer.print(graph, event.getLabel(), true);
+        }
+    }
+
+    @Override
+    public void compilationFinished(CompilationEvent event) {
+        if (printer != null) {
+            try {
+                printer.end();
+                stream.close();
+            } catch (IOException e) {
+                e.printStackTrace();
+            } finally {
+                printer = null;
+                stream = null;
+            }
+        }
+    }
+
+}