[Bug target/118984] Unnecessary instructions are emitted when addition terms are in an unfortunate order

[pinskia at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=118984

--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
(In reply to Andrew Pinski from comment #1)
> It only shows up with arguments and returns due to register allocation
> constraints.

Acually I was wrong here.
but it is still by accident really.

Register allocation is NP complete problem after all.