[Bug c++/71753] Clamp function does not work with O3 optimization

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71753

--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Comment on attachment 38830
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38830
Code that reproduces the issue

value + 0x7FFFFF00

Will overflow most of the time.