[Bug middle-end/93806] Wrong optimization: instability of floating-point results with -funsafe-math-optimizations leads to nonsense

[vincent-gcc at vinc17 dot net]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=93806

--- Comment #23 from Vincent Lefèvre <vincent-gcc at vinc17 dot net> ---
(In reply to Vincent Lefèvre from comment #22)
> Note that if one adds "if (s == u)" (which is true, and noticed by GCC)

Sorry, this is not noticed by GCC (I used an incorrect command line).

Anyway, the opaque's prevent any optimization.