--- old/src/jdk.internal.vm.compiler/share/classes/org.graalvm.compiler.lir/src/org/graalvm/compiler/lir/LIRValueUtil.java	2019-03-12 08:09:30.519540336 +0100
+++ new/src/jdk.internal.vm.compiler/share/classes/org.graalvm.compiler.lir/src/org/graalvm/compiler/lir/LIRValueUtil.java	2019-03-12 08:09:30.147537922 +0100
@@ -71,6 +71,11 @@
         return asConstantValue(value).getJavaConstant();
     }
 
+    public static boolean isNullConstant(Value value) {
+        assert value != null;
+        return isJavaConstant(value) && asJavaConstant(value).isNull();
+    }
+
     public static boolean isIntConstant(Value value, long expected) {
         if (isJavaConstant(value)) {
             JavaConstant javaConstant = asJavaConstant(value);