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[Bug middle-end/31723] Use reciprocal and reciprocal square root with -ffast-math
- From: "rguenth at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 10 Jun 2007 12:09:03 -0000
- Subject: [Bug middle-end/31723] Use reciprocal and reciprocal square root with -ffast-math
- References: <bug-31723-11659@http.gcc.gnu.org/bugzilla/>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Comment #15 from rguenth at gcc dot gnu dot org 2007-06-10 12:09 -------
And of course optimizing division or square root this way violates IEEE 754
which
specifies these as intrinsic operations. So a separate flag from
-funsafe-math-optimization should be used for this optimization.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=31723