6732732: CTW with EA: assert(n != 0L,"Bad immediate dominator info.") Summary: Missing edge to a call's return value in EA Connection Graph. Reviewed-by: never

6741738: TypePtr::add_offset() set incorrect offset when the add overflows Summary: Set offset to OffsetBot when the add overflows in TypePtr::add_offset() Reviewed-by: jrose, never

6736417: Fastdebug C2 crashes in StoreBNode::Ideal Summary: The result of step_through_mergemem() and remove_dead_region() is not checked in some cases. Reviewed-by: never