src/share/vm/opto/loopTransform.cpp

rev 8961 : [mq]: diff-shenandoah.patch

@@ -925,10 +925,11 @@
 
   Node *x = NULL;               // If required, a clone of 'n'
   // Check for 'n' being pinned in the backedge.
   if( n->in(0) && n->in(0) == back_ctrl ) {
     assert(clones.find(n->_idx) == NULL, "dead loop");
+    assert(n->Opcode() != Op_ShenandoahWriteBarrier, "no wbs yet");
     x = n->clone();             // Clone a copy of 'n' to preheader
     clones.push(x, n->_idx);
     x->set_req( 0, preheader_ctrl ); // Fix x's control input to preheader
   }