# HG changeset patch
# User Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
# Date 1367123490 -7200
# Node ID b59b10ddc797ee7ee12cfa3a85000678c80cdab1
# Parent  addc2a25d7279fad5f8d208f9a26590fdb9c522d
Do not combine merge with succeeding merge if it holds a stateAfter and the succeeding merge does not.

diff -r addc2a25d727 -r b59b10ddc797 graal/com.oracle.graal.nodes/src/com/oracle/graal/nodes/MergeNode.java
--- a/graal/com.oracle.graal.nodes/src/com/oracle/graal/nodes/MergeNode.java	Sun Apr 28 06:25:26 2013 +0200
+++ b/graal/com.oracle.graal.nodes/src/com/oracle/graal/nodes/MergeNode.java	Sun Apr 28 06:31:30 2013 +0200
@@ -154,6 +154,10 @@
             if (this.anchored().isNotEmpty()) {
                 return;
             }
+            if (merge.stateAfter() == null && this.stateAfter() != null) {
+                // We hold a state, but the succeeding merge does not => do not combine.
+                return;
+            }
             for (PhiNode phi : phis()) {
                 for (Node usage : phi.usages().filter(isNotA(FrameState.class))) {
                     if (!merge.isPhiAtMerge(usage)) {