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Re: [Bug target/27855] reassociation pass produces ~30% slower matrix multiplication code
- From: Daniel Berlin <dberlin at dberlin dot org>
- To: gcc-bugzilla at gcc dot gnu dot org
- Cc: gcc-bugs at gcc dot gnu dot org
- Date: Fri, 02 Jun 2006 22:11:13 -0400
- Subject: Re: [Bug target/27855] reassociation pass produces ~30% slower matrix multiplication code
- References: <bug-27855-1649@http.gcc.gnu.org/bugzilla/> <20060602231937.11857.qmail@sourceware.org>
steven at gcc dot gnu dot org wrote:
> ------- Comment #4 from steven at gcc dot gnu dot org 2006-06-02 23:19 -------
> Real bug, despite Andrew's usual portion of x86-hate.
>
>
It'd be good to know what exactly is going wrong.
Reassociation only touches floating point because someone asked me to
make it touch floating point.
It still shouldn't have *this* much of an affect, my guess is it is
triggering some bad behavior elsewhere.