[Bug c/77280] program using sizeof(array) fails after adding a statement with sizeof(array)

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=77280

--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Comment on attachment 39467
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=39467
source

Pr has an undefined value the first time through the loop.