--- a/graal/GraalCompiler/src/com/sun/c1x/debug/GraphvizPrinterObserver.java	Fri May 27 14:20:30 2011 +0200
+++ b/graal/GraalCompiler/src/com/sun/c1x/debug/GraphvizPrinterObserver.java	Fri May 27 17:48:28 2011 +0200
@@ -28,6 +28,7 @@
 import com.oracle.graal.graph.*;
 import com.oracle.graal.graph.vis.*;
 import com.sun.c1x.*;
+import com.sun.c1x.ir.*;
 import com.sun.c1x.observer.*;
 import com.sun.c1x.value.*;
 
@@ -70,26 +71,14 @@
             try {
                 if (pdf) {
                     ByteArrayOutputStream buffer = new ByteArrayOutputStream();
-                    GraphvizPrinter printer = new GraphvizPrinter(buffer);
-                    if (C1XOptions.OmitDOTFrameStates) {
-                        printer.addOmittedClass(FrameState.class);
-                    }
-                    printer.begin(name);
-                    printer.print(graph, true);
-                    printer.end();
+                    printGraph(graph, name, buffer);
 
                     out = new FileOutputStream(filename + ".pdf");
                     GraphvizRunner.process(GraphvizRunner.DOT_LAYOUT, new ByteArrayInputStream(buffer.toByteArray()), out, "pdf");
                 } else {
                     out = new FileOutputStream(filename + ".gv");
 
-                    GraphvizPrinter printer = new GraphvizPrinter(out);
-                    if (C1XOptions.OmitDOTFrameStates) {
-                        printer.addOmittedClass(FrameState.class);
-                    }
-                    printer.begin(name);
-                    printer.print(graph, true);
-                    printer.end();
+                    printGraph(graph, name, out);
                 }
             } catch (IOException e) {
                 e.printStackTrace();
@@ -103,4 +92,20 @@
             }
         }
     }
+
+    private static void printGraph(Graph graph, String name, OutputStream buffer) {
+        GraphvizPrinter printer = new GraphvizPrinter(buffer);
+        if (C1XOptions.OmitDOTFrameStates) {
+            printer.addOmittedClass(FrameState.class);
+        }
+        printer.addClassColor(StartNode.class, "snow3");
+        printer.addClassColor(EndNode.class, "snow3");
+        printer.addClassColor(LoopBegin.class, "skyblue");
+        printer.addClassColor(LoopEnd.class, "skyblue3");
+        printer.addClassColor(Unwind.class, "red");
+        printer.addClassColor(Return.class, "indianred1");
+        printer.begin(name);
+        printer.print(graph, true);
+        printer.end();
+    }
 }