src/hotspot/share/opto/castnode.cpp

@@ -460,10 +460,27 @@
   if (t == Type::TOP) return Type::TOP;
   if (t->base() == Type::RawPtr && t->singleton()) {
     uintptr_t bits = (uintptr_t) t->is_rawptr()->get_con();
     return TypeX::make(bits);
   }
+
+  PhaseIterGVN* igvn = phase->is_IterGVN();
+  if (igvn != NULL && (t->is_zero_type() || !TypePtr::NULL_PTR->higher_equal(t))) {
+    for (DUIterator_Fast imax, i = fast_outs(imax); i < imax; i++) {
+      Node* u = fast_out(i);
+      if (u->Opcode() == Op_OrL) {
+        for (DUIterator_Fast jmax, j = u->fast_outs(jmax); j < jmax; j++) {
+          Node* cmp = u->fast_out(j);
+          if (cmp->Opcode() == Op_CmpL) {
+            // Give CmpL a chance to get optimized
+            igvn->_worklist.push(cmp);
+          }
+        }
+      }
+    }
+  }
+
   return CastP2XNode::bottom_type();
 }
 
 Node *CastP2XNode::Ideal(PhaseGVN *phase, bool can_reshape) {
   return (in(0) && remove_dead_region(phase, can_reshape)) ? this : NULL;