src/jdk.internal.vm.compiler/share/classes/org.graalvm.compiler.nodes/src/org/graalvm/compiler/nodes/calc/IsNullNode.java

*** 119,129 ****
          }
      }
  
      @Override
      public Stamp getSucceedingStampForValue(boolean negated) {
!         AbstractPointerStamp pointerStamp = (AbstractPointerStamp) getValue().stamp();
          return negated ? pointerStamp.asNonNull() : pointerStamp.asAlwaysNull();
      }
  
      @Override
      public TriState tryFold(Stamp valueStamp) {
--- 119,130 ----
          }
      }
  
      @Override
      public Stamp getSucceedingStampForValue(boolean negated) {
!         // Ignore any more precise input stamp since canonicalization will skip through PiNodes
!         AbstractPointerStamp pointerStamp = (AbstractPointerStamp) getValue().stamp().unrestricted();
          return negated ? pointerStamp.asNonNull() : pointerStamp.asAlwaysNull();
      }
  
      @Override
      public TriState tryFold(Stamp valueStamp) {