https://gcc.gnu.org/bugzilla/show_bug.cgi?id=59478
--- Comment #1 from Oleg Endo <olegendo at gcc dot gnu.org> ---
(In reply to Oleg Endo from comment #0)
> This happens at least on SH with trunk rev 205905 (4.9).
> I'm not sure whether these are target specific or not.
>
> Accessing float values as integers can be done in various ways. One way is
> to do a byte copy...
>
> int float_as_int (float val)
> {
> char valbytes[sizeof (float)];
> __builtin_memcpy (valbytes, &val, sizeof (float));
>
> int result;
> __builtin_memcpy (&result, valbytes, sizeof (float));
>
> return result;
> }
>
> The above compiled with -m4-single -ml -O2 results in:
>
> add #-8,r15
> fmov.s fr5,@r15
> mov.l @r15,r0
> rts
> add #8,r15
>
> which is not so bad actually, but could be done better by utilizing the fpul
> register, as it is done when using the union approach:
This case got better. It now produces the expected sequence:
flds fr5,fpul
rts
sts fpul,r0
