[PATCH] Enable fixed-point reductions in graphite

Tom de Vries Tom_deVries@mentor.com
Sun Jul 26 17:09:00 GMT 2015


Hi,

In patch "Don't allow unsafe reductions in graphite" ( submitted 
https://gcc.gnu.org/ml/gcc-patches/2015-07/msg01861.html , committed 
r226193) we've disabled fixed-point reductions.

In this patch we enable it again, for the case that it's safe, in other 
words, for the case that the fixed point overflow wraps.

The patch uses FIXED_POINT_TYPE_OVERFLOW_WRAPS_P, introduced in proposed 
patch https://gcc.gnu.org/ml/gcc-patches/2015-07/msg02049.html .

Bootstrapped and reg-tested on x86_64.

OK for trunk?

Thanks,
- Tom
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