# HG changeset patch
# User Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
# Date 1367123524 -7200
# Node ID 6a050090dff89b8ba5be42128750ebbdee327c50
# Parent  b59b10ddc797ee7ee12cfa3a85000678c80cdab1
Preserve begin nodes with associated state.

diff -r b59b10ddc797 -r 6a050090dff8 graal/com.oracle.graal.nodes/src/com/oracle/graal/nodes/BeginNode.java
--- a/graal/com.oracle.graal.nodes/src/com/oracle/graal/nodes/BeginNode.java	Sun Apr 28 06:31:30 2013 +0200
+++ b/graal/com.oracle.graal.nodes/src/com/oracle/graal/nodes/BeginNode.java	Sun Apr 28 06:32:04 2013 +0200
@@ -73,6 +73,8 @@
             // This is the start node.
         } else if (prev instanceof ControlSplitNode) {
             // This begin node is necessary.
+        } else if (this.stateAfter() != null) {
+            // Begin node necessary to preserve state.
         } else {
             // This begin node can be removed and all guards moved up to the preceding begin node.
             prepareDelete();