[Bug middle-end/30816] gfortran.dg/g77/intrinsic-unix-erf.f tests fail with optimization

["ghazi at gcc dot gnu dot org" <gcc-bugzilla@gcc.gnu.org>]

------- Comment #6 from ghazi at gcc dot gnu dot org  2007-02-16 05:16 -------
(In reply to comment #4)
> [...] It may be darwin-specific.
> This is my best guess.  Consider
> program j
>   x = erf(1.5)
> end program j
> With a 4.2 gfortran prior to your patches, -fdump-tree-original gives
> MAIN__ ()
> {
>   real4 x;
>   _gfortran_set_std (70, 127, 0);
>   x = __builtin_erff (1.5e+0);
> }
> With a fairly up to date trunk with your patch, I get
> MAIN__ ()
> {
>   real4 x;
>   _gfortran_set_std (70, 127, 0, 0);
>   x = 9.66105163097381591796875e-1;
> }

Okay, actually I'm pleased to know that fortran uses the generic middle-end
builtins infrastructure.  Anyway, looks like it works for you (and me) so I
agree it's likely darwin specific and I'm still of the opinion it's not a
darwin GCC bug, but rather a buggy build of GMP and/or MPFR on Tobi's darwin
box.  What say you Tobi, can you confirm either way?


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=30816