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
Enable fixed-point reductions in graphite
2015-07-24 Tom de Vries <t...@codesourcery.com>
* graphite-sese-to-poly.c (is_reduction_operation_p): Allow wrapping
fixed-point operations.
---
gcc/graphite-sese-to-poly.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/gcc/graphite-sese-to-poly.c b/gcc/graphite-sese-to-poly.c
index 531c848..aa823f8 100644
--- a/gcc/graphite-sese-to-poly.c
+++ b/gcc/graphite-sese-to-poly.c
@@ -2626,6 +2626,9 @@ is_reduction_operation_p (gimple stmt)
return false;
}
+ if (FIXED_POINT_TYPE_P (type))
+ return FIXED_POINT_TYPE_OVERFLOW_WRAPS_P (type);
+
return false;
}
--
1.9.1
