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[Bug target/19150] [3.3/3.4/4.0/4.1 Regression] suboptimal fp division with -ffast-math
- From: "uros at kss-loka dot si" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 13 Apr 2005 09:59:02 -0000
- Subject: [Bug target/19150] [3.3/3.4/4.0/4.1 Regression] suboptimal fp division with -ffast-math
- References: <20041224192336.19150.pinskia@gcc.gnu.org>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Additional Comments From uros at kss-loka dot si 2005-04-13 09:58 -------
(In reply to comment #7)
> Uros, what's the state of this bug? I don't understand if the patch linked in
> comment #6 was committed, or which is its final version still pending
> review/approval.
Another approach was suggested by Roger Sayle in
http://gcc.gnu.org/ml/gcc-patches/2004-09/msg02017.html. We would force
CONST_DOUBLE to memory only if (newly created) combined instruction with
CONST_DOUBLE operand doesn't match. However, this approach requires some more
hacking, and I havn't look into it (yet...?).
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19150