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[Bug target/27855] [4.3 regression] reassociation causes the RA to be confused
- From: "pinskia at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 26 Dec 2007 01:37:03 -0000
- Subject: [Bug target/27855] [4.3 regression] reassociation causes the RA to be confused
- References: <bug-27855-1649@http.gcc.gnu.org/bugzilla/>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Comment #21 from pinskia at gcc dot gnu dot org 2007-12-26 01:37 -------
As mentioned, this is really a ra issue as I showed it with integers.
reassociation does nothing except for reschedule the instructions.
--
pinskia at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |pinskia at gcc dot gnu dot
| |org
Severity|normal |enhancement
GCC build triplet|i686-pc-linux-gnu |
GCC host triplet|i686-pc-linux-gnu |
Summary|[4.3 regression] |[4.3 regression]
|reassociation pass produces |reassociation causes the RA
|~30% slower matrix |to be confused
|multiplication code |
Target Milestone|--- |4.3.0
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=27855