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changeset 9512:05b8a812b487

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Remove dead IsNull nodes in Guard lowering phase
author Gilles Duboscq <duboscq@ssw.jku.at>
date Thu, 02 May 2013 14:37:27 +0200
parents 715f82d1f695
children 3bb1834202f7 c45c0bda3602
files graal/com.oracle.graal.phases.common/src/com/oracle/graal/phases/common/GuardLoweringPhase.java
diffstat 1 files changed, 3 insertions(+), 0 deletions(-) [+]
line wrap: on
line diff
--- a/graal/com.oracle.graal.phases.common/src/com/oracle/graal/phases/common/GuardLoweringPhase.java	Thu May 02 14:35:48 2013 +0200
+++ b/graal/com.oracle.graal.phases.common/src/com/oracle/graal/phases/common/GuardLoweringPhase.java	Thu May 02 14:37:27 2013 +0200
@@ -193,6 +193,9 @@
             IsNullNode isNull = (IsNullNode) guard.condition();
             NullCheckNode nullCheck = guard.graph().add(new NullCheckNode(isNull.object()));
             replaceCurrent(nullCheck);
+            if (isNull.usages().isEmpty()) {
+                isNull.safeDelete();
+            }
         }
 
         private void insertLoopExits(DeoptimizeNode deopt) {