[Bug c/70255] change of the order of summation of floating point numbers despite no-associative-math

[mpolacek at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70255

--- Comment #19 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Markus recently committed a patch (r235580) that points out that this attribute
should only be used for debugging.