# HG changeset patch
# User Lukas Stadler <lukas.stadler@oracle.com>
# Date 1401290064 -7200
# Node ID a750e0d83535576518ab90f29e9f392c4f7c3122
# Parent  b7748fffea09f58363e2df1d25058ab03a983d58
cache last receiver stamp in MethodCallTargetNode

diff -r b7748fffea09 -r a750e0d83535 graal/com.oracle.graal.nodes/src/com/oracle/graal/nodes/java/MethodCallTargetNode.java
--- a/graal/com.oracle.graal.nodes/src/com/oracle/graal/nodes/java/MethodCallTargetNode.java	Wed May 28 17:14:24 2014 +0200
+++ b/graal/com.oracle.graal.nodes/src/com/oracle/graal/nodes/java/MethodCallTargetNode.java	Wed May 28 17:14:24 2014 +0200
@@ -42,6 +42,8 @@
     private ResolvedJavaMethod targetMethod;
     private InvokeKind invokeKind;
 
+    private transient Stamp lastCanonicalizedReceiverStamp;
+
     /**
      * @param arguments
      */
@@ -138,12 +140,17 @@
             }
 
             // check if the type of the receiver can narrow the result
-            ValueNode receiver = receiver();
-            ResolvedJavaType type = StampTool.typeOrNull(receiver);
+            Stamp receiverStamp = receiver().stamp();
+            if (receiverStamp.equals(lastCanonicalizedReceiverStamp)) {
+                return this;
+            }
+            lastCanonicalizedReceiverStamp = receiverStamp;
+
+            ResolvedJavaType type = StampTool.typeOrNull(receiverStamp);
             if (type != null && (invoke().stateAfter() != null || invoke().stateDuring() != null)) {
                 // either the holder class is exact, or the receiver object has an exact type
                 ResolvedJavaMethod resolvedMethod = type.resolveMethod(targetMethod, invoke().getContextType());
-                if (resolvedMethod != null && (resolvedMethod.canBeStaticallyBound() || StampTool.isExactType(receiver))) {
+                if (resolvedMethod != null && (resolvedMethod.canBeStaticallyBound() || StampTool.isExactType(receiverStamp))) {
                     invokeKind = InvokeKind.Special;
                     targetMethod = resolvedMethod;
                     return this;