# HG changeset patch
# User Lukas Stadler <lukas.stadler@oracle.com>
# Date 1412853977 -7200
# Node ID 763a34f283f9171eb911acf7d7e6a763b7c4859a
# Parent  9e5abd0e7916543203bf0f2d9201de9d8b877fc3
make Truffle Node parent @CompilationFinal, let getEncapsulatingSourceSection evaluate at compile time

diff -r 9e5abd0e7916 -r 763a34f283f9 graal/com.oracle.truffle.api/src/com/oracle/truffle/api/nodes/Node.java
--- a/graal/com.oracle.truffle.api/src/com/oracle/truffle/api/nodes/Node.java	Thu Oct 09 14:51:39 2014 +0200
+++ b/graal/com.oracle.truffle.api/src/com/oracle/truffle/api/nodes/Node.java	Thu Oct 09 13:26:17 2014 +0200
@@ -38,7 +38,7 @@
  */
 public abstract class Node implements Cloneable {
 
-    private Node parent;
+    @CompilationFinal private Node parent;
 
     @CompilationFinal private SourceSection sourceSection;
 
@@ -124,12 +124,16 @@
      *
      * @return the assigned source code section
      */
-    @CompilerDirectives.SlowPath
+    @ExplodeLoop
     public final SourceSection getEncapsulatingSourceSection() {
-        if (sourceSection == null && getParent() != null) {
-            return getParent().getEncapsulatingSourceSection();
+        Node current = this;
+        while (current != null) {
+            if (current.sourceSection != null) {
+                return current.sourceSection;
+            }
+            current = current.parent;
         }
-        return sourceSection;
+        return null;
     }
 
     /**