src/share/vm/opto/loopTransform.cpp
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rev 4327 : [mq]: JDK-8009181
@@ -884,12 +884,14 @@
#endif
C->set_major_progress();
// Find common pieces of the loop being guarded with pre & post loops
CountedLoopNode *main_head = loop->_head->as_CountedLoop();
+ guarantee(main_head != NULL, "no main head loop node");
assert( main_head->is_normal_loop(), "" );
CountedLoopEndNode *main_end = main_head->loopexit();
+ guarantee(main_end != NULL, "no main end loop node");
assert( main_end->outcnt() == 2, "1 true, 1 false path only" );
uint dd_main_head = dom_depth(main_head);
uint max = main_head->outcnt();
Node *pre_header= main_head->in(LoopNode::EntryControl);
@@ -2552,17 +2554,20 @@
// store related values are ok
ok.set(store->_idx);
ok.set(store->in(MemNode::Memory)->_idx);
+ CountedLoopEndNode* head_exit = head->loopexit();
+ guarantee(head_exit != NULL, "no head exit loop node");
+
// Loop structure is ok
ok.set(head->_idx);
- ok.set(head->loopexit()->_idx);
+ ok.set(head_exit->_idx);
ok.set(head->phi()->_idx);
ok.set(head->incr()->_idx);
- ok.set(head->loopexit()->cmp_node()->_idx);
- ok.set(head->loopexit()->in(1)->_idx);
+ ok.set(head_exit->cmp_node()->_idx);
+ ok.set(head_exit->in(1)->_idx);
// Address elements are ok
if (con) ok.set(con->_idx);
if (shift) ok.set(shift->_idx);
if (conv) ok.set(conv->_idx);