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* [Bug optimization/13745] New: [tree-ssa] expressions not converted back to array form
@ 2004-01-19 18:54 dann at godzilla dot ics dot uci dot edu
  2004-01-19 18:54 ` [Bug optimization/13745] " dann at godzilla dot ics dot uci dot edu
                   ` (13 more replies)
  0 siblings, 14 replies; 16+ messages in thread
From: dann at godzilla dot ics dot uci dot edu @ 2004-01-19 18:54 UTC (permalink / raw)
  To: gcc-bugs

In the oopack benchmark converted to use ints instead of doubles the following
can be seen in the .optimized dump:

in Matrix::c_style
 sum = C[pretmp.432 + k] * D[k * 50 + j] + sum;

The equivalent in Matrix::oop_style: 
<L2>:;
  <D7085> = (int *)((unsigned int)(pretmp.525 + k) * 4) + &C;
<L3>:;
  T.275 = *<D7085>;
  <D7098> = (int *)((unsigned int)(k * 50 + j) * 4) + &D;
<L4>:;
  sum = T.275 * *<D7098> + sum;


This might or might not be related to the Matrix slowdown mentioned at:
 http://gcc.gnu.org/ml/gcc/2004-01/msg01161.html

-- 
           Summary: [tree-ssa] expressions not converted back to array form
           Product: gcc
           Version: tree-ssa
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: optimization
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: dann at godzilla dot ics dot uci dot edu
                CC: gcc-bugs at gcc dot gnu dot org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13745


^ permalink raw reply	[flat|nested] 16+ messages in thread
[parent not found: <bug-13745-1008@http.gcc.gnu.org/bugzilla/>]
end of thread, other threads:[~2010-07-21 20:54 UTC | newest]

Thread overview: 16+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2004-01-19 18:54 [Bug optimization/13745] New: [tree-ssa] expressions not converted back to array form dann at godzilla dot ics dot uci dot edu
2004-01-19 18:54 ` [Bug optimization/13745] " dann at godzilla dot ics dot uci dot edu
2004-01-19 19:04 ` pinskia at gcc dot gnu dot org
2004-01-21 20:11 ` pinskia at gcc dot gnu dot org
2004-01-21 20:12 ` pinskia at gcc dot gnu dot org
2004-02-15 22:55 ` pinskia at gcc dot gnu dot org
2004-02-19 22:28 ` [Bug c++/13745] " pinskia at gcc dot gnu dot org
2004-02-23 20:40 ` pinskia at gcc dot gnu dot org
2004-03-07  3:42 ` pinskia at gcc dot gnu dot org
2004-04-04  7:19 ` [Bug optimization/13745] " pinskia at gcc dot gnu dot org
2004-05-24 15:40 ` [Bug tree-optimization/13745] " pinskia at gcc dot gnu dot org
2004-08-24  1:35 ` pinskia at gcc dot gnu dot org
2004-09-03  9:33 ` pinskia at gcc dot gnu dot org
2005-07-12 21:28 ` pinskia at gcc dot gnu dot org
2005-09-20 17:17 ` pinskia at gcc dot gnu dot org
     [not found] <bug-13745-1008@http.gcc.gnu.org/bugzilla/>
2010-07-21 20:54 ` steven at gcc dot gnu dot org

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