src/jdk.internal.vm.compiler/share/classes/org.graalvm.compiler.hotspot/src/org/graalvm/compiler/hotspot/meta/HotSpotWordOperationPlugin.java

*** 38,48 ****
  import org.graalvm.compiler.hotspot.nodes.type.MetaspacePointerStamp;
  import org.graalvm.compiler.hotspot.nodes.type.MethodPointerStamp;
  import org.graalvm.compiler.hotspot.word.HotSpotOperation;
  import org.graalvm.compiler.hotspot.word.HotSpotOperation.HotspotOpcode;
  import org.graalvm.compiler.hotspot.word.PointerCastNode;
- import org.graalvm.compiler.nodes.AbstractBeginNode;
  import org.graalvm.compiler.nodes.LogicNode;
  import org.graalvm.compiler.nodes.ValueNode;
  import org.graalvm.compiler.nodes.calc.ConditionalNode;
  import org.graalvm.compiler.nodes.calc.IsNullNode;
  import org.graalvm.compiler.nodes.calc.PointerEqualsNode;
--- 38,47 ----
*** 147,161 ****
                  } else {
                      assert args[2].isConstant();
                      location = snippetReflection.asObject(LocationIdentity.class, args[2].asJavaConstant());
                  }
                  ReadNode read = b.add(new ReadNode(address, location, readStamp, BarrierType.NONE));
-                 /*
-                  * The read must not float outside its block otherwise it may float above an
-                  * explicit zero check on its base address.
-                  */
-                 read.setGuard(AbstractBeginNode.prevBegin(read));
                  b.push(returnKind, read);
                  break;
  
              default:
                  throw GraalError.shouldNotReachHere("unknown operation: " + operation.opcode());
--- 146,155 ----