src/jdk.internal.vm.compiler/share/classes/org.graalvm.compiler.graph/src/org/graalvm/compiler/graph/Node.java

@@ -36,10 +36,11 @@
 import java.util.Formatter;
 import java.util.HashMap;
 import java.util.Map;
 import java.util.Objects;
 import java.util.function.Predicate;
+import java.util.function.Supplier;
 
 import org.graalvm.compiler.core.common.Fields;
 import org.graalvm.compiler.core.common.type.AbstractPointerStamp;
 import org.graalvm.compiler.core.common.type.Stamp;
 import org.graalvm.compiler.debug.DebugCloseable;

@@ -596,10 +597,19 @@
         if (sourcePosition != null && graph != null && !graph.seenNodeSourcePosition) {
             graph.seenNodeSourcePosition = true;
         }
     }
 
+    /**
+     * Update the source position only if it is null.
+     */
+    public void updateNodeSourcePosition(Supplier<NodeSourcePosition> sourcePositionSupp) {
+        if (this.sourcePosition == null) {
+            setNodeSourcePosition(sourcePositionSupp.get());
+        }
+    }
+
     public DebugCloseable withNodeSourcePosition() {
         return graph.withNodeSourcePosition(this);
     }
 
     public final NodeClass<? extends Node> getNodeClass() {