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

*** 27,46 ****
  import org.graalvm.compiler.core.common.type.StampFactory;
  import org.graalvm.compiler.graph.NodeClass;
  import org.graalvm.compiler.nodeinfo.InputType;
  import org.graalvm.compiler.nodeinfo.NodeCycles;
  import org.graalvm.compiler.nodeinfo.NodeInfo;
- import org.graalvm.compiler.nodes.ConstantNode;
  import org.graalvm.compiler.nodes.FrameState;
  import org.graalvm.compiler.nodes.StateSplit;
  import org.graalvm.compiler.nodes.ValueNode;
  import org.graalvm.compiler.nodes.spi.Virtualizable;
  import org.graalvm.compiler.nodes.spi.VirtualizerTool;
  import org.graalvm.compiler.nodes.virtual.VirtualInstanceNode;
  import org.graalvm.compiler.nodes.virtual.VirtualObjectNode;
  
- import jdk.vm.ci.meta.JavaConstant;
  import jdk.vm.ci.meta.ResolvedJavaField;
  
  /**
   * The {@code StoreFieldNode} represents a write to a static or instance field.
   */
--- 27,44 ----
*** 88,106 ****
          ValueNode alias = tool.getAlias(object());
          if (alias instanceof VirtualObjectNode) {
              VirtualInstanceNode virtual = (VirtualInstanceNode) alias;
              int fieldIndex = virtual.fieldIndex(field());
              if (fieldIndex != -1) {
!                 ValueNode existing = tool.getEntry((VirtualObjectNode) alias, fieldIndex);
!                 if (existing.stamp().isCompatible(value().stamp())) {
!                     tool.setVirtualEntry(virtual, fieldIndex, value(), false);
                      tool.delete();
-                 } else {
-                     // stamp of the value is not compatible with the value in the virtualizer
-                     // can only happen with unsafe two slot writes on one slot fields
-                     assert existing instanceof ConstantNode && ((ConstantNode) existing).asConstant().equals(JavaConstant.forIllegal()) : value.stamp() + " vs " + existing.stamp();
-                 }
              }
          }
      }
  
      public FrameState getState() {
--- 86,97 ----
          ValueNode alias = tool.getAlias(object());
          if (alias instanceof VirtualObjectNode) {
              VirtualInstanceNode virtual = (VirtualInstanceNode) alias;
              int fieldIndex = virtual.fieldIndex(field());
              if (fieldIndex != -1) {
!                 tool.setVirtualEntry(virtual, fieldIndex, value());
                  tool.delete();
              }
          }
      }
  
      public FrameState getState() {