src/hotspot/share/opto/loopopts.cpp

@@ -691,11 +691,13 @@
 
 // Try moving a store out of a loop, right before the loop
 Node* PhaseIdealLoop::try_move_store_before_loop(Node* n, Node *n_ctrl) {
   // Store has to be first in the loop body
   IdealLoopTree *n_loop = get_loop(n_ctrl);
-  if (n->is_Store() && n_loop != _ltree_root && n_loop->is_loop() && n->in(0) != NULL) {
+  if (n->is_Store() && n_loop != _ltree_root &&
+      n_loop->is_loop() && n_loop->_head->is_Loop() &&
+      n->in(0) != NULL) {
     Node* address = n->in(MemNode::Address);
     Node* value = n->in(MemNode::ValueIn);
     Node* mem = n->in(MemNode::Memory);
     IdealLoopTree* address_loop = get_loop(get_ctrl(address));
     IdealLoopTree* value_loop = get_loop(get_ctrl(value));