Hello!
I was wondering if there are objects to automatically activating Uros' new -mrecip flag when -ffast-math is specified. It looks like a good match since -mrecip is exactly about fast non-precise mathematics.
There is a discussion in gcc-patches@ mailing list about this topic, in "Re: [PATCH, middle-end, i386]: reciprocal rsqrt pass + full recip x86 backend support" thread [1]. The main problem is, that one of the polyhedron tests segfaults with this patch (not the problem of the recip patch, but usage of questionable FP equivalence tests and FP indexes in the array).
Uros. [1]: http://gcc.gnu.org/ml/gcc-patches/2007-06/msg01146.html
