https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70359
--- Comment #13 from Jeffrey A. Law <law at redhat dot com> --- The change to the assignment of p_22 is made by forwprop1. It does create a situation where p_2 is live outside the loop and hides the CSE opportunity, which may be the cause of the more significant differences at expansion time.
