# HG changeset patch
# User Gilles Duboscq <duboscq@ssw.jku.at>
# Date 1389871109 -3600
# Node ID 32af063cc29c7f2f03b09e232eee12c0f31c6fb0
# Parent  966f65db51152e67c68b9f2b6bf7b945291100eb
Don't create null guards for values that are already known to be non-null.

diff -r 966f65db5115 -r 32af063cc29c graal/com.oracle.graal.hotspot/src/com/oracle/graal/hotspot/meta/HotSpotLoweringProvider.java
--- a/graal/com.oracle.graal.hotspot/src/com/oracle/graal/hotspot/meta/HotSpotLoweringProvider.java	Wed Jan 15 21:30:34 2014 +0100
+++ b/graal/com.oracle.graal.hotspot/src/com/oracle/graal/hotspot/meta/HotSpotLoweringProvider.java	Thu Jan 16 12:18:29 2014 +0100
@@ -705,6 +705,9 @@
     }
 
     private static GuardingNode createNullCheck(ValueNode object, FixedNode before, LoweringTool tool) {
+        if (ObjectStamp.isObjectNonNull(object)) {
+            return null;
+        }
         return tool.createGuard(before, before.graph().unique(new IsNullNode(object)), DeoptimizationReason.NullCheckException, DeoptimizationAction.InvalidateReprofile, true);
     }