src/share/vm/opto/escape.cpp

*** 522,537 ****
    //
    // It could happened on subclass's branch (from the type profiling
    // inlining) which was not eliminated during parsing since the exactness
    // of the allocation type was not propagated to the subclass type check.
    //
    // Do nothing for such AddP node and don't process its users since
    // this code branch will go away.
    //
    if (!t->is_known_instance() &&
!       !t->klass()->equals(base_t->klass()) &&
!       t->klass()->is_subtype_of(base_t->klass())) {
       return false; // bail out
    }
  
    const TypeOopPtr *tinst = base_t->add_offset(t->offset())->is_oopptr();
    // Do NOT remove the next call: ensure an new alias index is allocated
--- 522,540 ----
    //
    // It could happened on subclass's branch (from the type profiling
    // inlining) which was not eliminated during parsing since the exactness
    // of the allocation type was not propagated to the subclass type check.
    //
+   // Or the type 't' could be not related to 'base_t' at all.
+   // It could happened when CHA type is different from MDO type on a dead path 
+   // (for example, from instanceof check) which is not collapsed during parsing.
+   //
    // Do nothing for such AddP node and don't process its users since
    // this code branch will go away.
    //
    if (!t->is_known_instance() &&
!       !base_t->klass()->is_subtype_of(t->klass())) {
       return false; // bail out
    }
  
    const TypeOopPtr *tinst = base_t->add_offset(t->offset())->is_oopptr();
    // Do NOT remove the next call: ensure an new alias index is allocated