[Patch, fortran] PR24518 and PR24520 - Improvements to MOD and DOT_PRODUCT

[François-Xavier Coudert]

> It is proposed to retain the library version of the DOT_PRODUCT because
> the inline version does not work for types longer that 8 bytes and for a
> future implementation, where the library is used with the option -Os.

I'm not sure we want to work too much on that -Os option. Anyhow, you
don't know if the guy using -Os will end up linking statically or
dynamically.

By the way, are there really people compiling Fortran code and
optimizing for size?

> Unoptimized, the new version of MOD is a factor of two faster than the
> old but the improvement is only 20% for -O2 and more.

I'm not sure I understood that. In both cases, the library must be the
same, no? So it sounds like your new version of MOD is slower at high
optimization levels...

FX