src/share/vm/opto/phaseX.cpp

*** 1513,1522 ****
--- 1513,1537 ----
  void PhaseCCP::do_transform() {
    // Correct leaves of new-space Nodes; they point to old-space.
    C->set_root( transform(C->root())->as_Root() );
    assert( C->top(),  "missing TOP node" );
    assert( C->root(), "missing root" );
+ 
+   // Eagerly remove castPP nodes here. CastPP nodes might not be
+   // removed in the subsequent IGVN phase if a node that changes
+   // in(1) of a castPP is processed prior to the castPP node.
+   for (uint i = 0; i < _worklist.size(); i++) {
+     Node* n = _worklist.at(i);
+ 
+     if (n->is_ConstraintCast()) {
+       Node* nn = n->Identity(this);
+       if (nn != n) {
+         replace_node(n, nn);
+         _worklist.remove(n);
+       }
+     }
+   }
  }
  
  //------------------------------transform--------------------------------------
  // Given a Node in old-space, clone him into new-space.
  // Convert any of his old-space children into new-space children.