weird optimization in sin+cos, x86 backend

[Andrew Haley]

On 02/10/2012 10:07 AM, Richard Guenther wrote:
> 
> The issue with libm in glibc here is that Drepper absolutely does
> not want new ABIs in libm - he believes that for example vectorized
> routines do not belong there (nor the SSE calling-convention variants
> for i686 I tried to push once).

That's a good reason why we can't do this in glibc.  I accept
the point; it'll have to be GNU libm.

Andrew.