[Bug target/27855] [4.3 regression] reassociation causes the RA to be confused

[pinskia 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