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* [Bug tree-optimization/33711] Missed optimization: reduction by subtraction (vectorizer)
[not found] <bug-33711-4@http.gcc.gnu.org/bugzilla/>
@ 2012-07-13 8:49 ` rguenth at gcc dot gnu.org
2012-07-16 13:05 ` rguenth at gcc dot gnu.org
1 sibling, 0 replies; 4+ messages in thread
From: rguenth at gcc dot gnu.org @ 2012-07-13 8:49 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=33711
Richard Guenther <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Blocks| |53947
--- Comment #3 from Richard Guenther <rguenth at gcc dot gnu.org> 2012-07-13 08:49:08 UTC ---
Link to vectorizer missed-optimization meta-bug.
^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug tree-optimization/33711] Missed optimization: reduction by subtraction (vectorizer)
[not found] <bug-33711-4@http.gcc.gnu.org/bugzilla/>
2012-07-13 8:49 ` [Bug tree-optimization/33711] Missed optimization: reduction by subtraction (vectorizer) rguenth at gcc dot gnu.org
@ 2012-07-16 13:05 ` rguenth at gcc dot gnu.org
1 sibling, 0 replies; 4+ messages in thread
From: rguenth at gcc dot gnu.org @ 2012-07-16 13:05 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=33711
Richard Guenther <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution| |FIXED
--- Comment #4 from Richard Guenther <rguenth at gcc dot gnu.org> 2012-07-16 13:05:15 UTC ---
Fixed.
^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug tree-optimization/33711] Missed optimization: reduction by subtraction (vectorizer)
2007-10-09 13:20 [Bug c/33711] New: " eres at il dot ibm dot com
2007-10-09 13:50 ` [Bug tree-optimization/33711] " eres at il dot ibm dot com
@ 2007-12-08 23:12 ` pinskia at gcc dot gnu dot org
1 sibling, 0 replies; 4+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2007-12-08 23:12 UTC (permalink / raw)
To: gcc-bugs
------- Comment #2 from pinskia at gcc dot gnu dot org 2007-12-08 23:12 -------
Confirmed.
--
pinskia at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
Severity|normal |enhancement
Status|UNCONFIRMED |NEW
Ever Confirmed|0 |1
Keywords| |missed-optimization
Last reconfirmed|0000-00-00 00:00:00 |2007-12-08 23:12:46
date| |
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=33711
^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug tree-optimization/33711] Missed optimization: reduction by subtraction (vectorizer)
2007-10-09 13:20 [Bug c/33711] New: " eres at il dot ibm dot com
@ 2007-10-09 13:50 ` eres at il dot ibm dot com
2007-12-08 23:12 ` pinskia at gcc dot gnu dot org
1 sibling, 0 replies; 4+ messages in thread
From: eres at il dot ibm dot com @ 2007-10-09 13:50 UTC (permalink / raw)
To: gcc-bugs
------- Comment #1 from eres at il dot ibm dot com 2007-10-09 13:49 -------
The loop in the above example does not get vectorized because of the
subtraction in reduction; which is currently not supported.
Taken from the vectorizer dump:
test.c:19: note: worklist: examine stmt: udiff_7 = udiff_20 - D.2210_6
test.c:19: note: vect_is_simple_use: operand udiff_20
test.c:19: note: def_stmt: udiff_20 = PHI <udiff_7(4), 1.5e+3(2)>
test.c:19: note: Unsupported pattern.
test.c:19: note: not vectorized: unsupported use in stmt.
test.c:19: note: unexpected pattern.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=33711
^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2012-07-16 13:05 UTC | newest]
Thread overview: 4+ messages (download: mbox.gz / follow: Atom feed)
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[not found] <bug-33711-4@http.gcc.gnu.org/bugzilla/>
2012-07-13 8:49 ` [Bug tree-optimization/33711] Missed optimization: reduction by subtraction (vectorizer) rguenth at gcc dot gnu.org
2012-07-16 13:05 ` rguenth at gcc dot gnu.org
2007-10-09 13:20 [Bug c/33711] New: " eres at il dot ibm dot com
2007-10-09 13:50 ` [Bug tree-optimization/33711] " eres at il dot ibm dot com
2007-12-08 23:12 ` pinskia at gcc dot gnu dot org
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