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changeset 6552:3cd6c6743a6a

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Do not generate null check for values already proven to be non-null.
author Christian Wimmer <christian.wimmer@oracle.com>
date Fri, 12 Oct 2012 16:10:05 -0700
parents 4ecd2f236bd8
children 85724a16e4c2
files graal/com.oracle.graal.java/src/com/oracle/graal/java/GraphBuilderPhase.java
diffstat 1 files changed, 3 insertions(+), 0 deletions(-) [+]
line wrap: on
line diff
--- a/graal/com.oracle.graal.java/src/com/oracle/graal/java/GraphBuilderPhase.java	Fri Oct 12 16:09:36 2012 -0700
+++ b/graal/com.oracle.graal.java/src/com/oracle/graal/java/GraphBuilderPhase.java	Fri Oct 12 16:10:05 2012 -0700
@@ -759,6 +759,9 @@
     }
 
     private void emitNullCheck(ValueNode receiver) {
+        if (receiver.stamp().nonNull()) {
+            return;
+        }
         BlockPlaceholderNode trueSucc = currentGraph.add(new BlockPlaceholderNode());
         BlockPlaceholderNode falseSucc = currentGraph.add(new BlockPlaceholderNode());
         IfNode ifNode = currentGraph.add(new IfNode(currentGraph.unique(new IsNullNode(receiver)), trueSucc, falseSucc, 0.5, graphId));