[Bug tree-optimization/33711] Missed optimization: reduction by subtraction (vectorizer)

2012-07-16 Thread rguenth at gcc dot gnu.org 
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=33711

Richard Guenther  changed:

   What|Removed |Added

 Status|NEW |RESOLVED
 Resolution||FIXED

--- Comment #4 from Richard Guenther  2012-07-16 
13:05:15 UTC ---
Fixed.

[Bug tree-optimization/33711] Missed optimization: reduction by subtraction (vectorizer)

2012-07-13 Thread rguenth at gcc dot gnu.org 
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=33711

Richard Guenther  changed:

   What|Removed |Added

 Blocks||53947

--- Comment #3 from Richard Guenther  2012-07-13 
08:49:08 UTC ---
Link to vectorizer missed-optimization meta-bug.

[Bug tree-optimization/33711] Missed optimization: reduction by subtraction (vectorizer)

2007-12-08 Thread pinskia at gcc dot gnu dot org 


--- Comment #2 from pinskia at gcc dot gnu dot org  2007-12-08 23:12 ---
Confirmed.


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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|-00-00 00:00:00 |2007-12-08 23:12:46
   date||


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=33711

[Bug tree-optimization/33711] Missed optimization: reduction by subtraction (vectorizer)

2007-10-09 Thread eres at il dot ibm dot com 


--- 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 
test.c:19: note: Unsupported pattern.
test.c:19: note: not vectorized: unsupported use in stmt.
test.c:19: note: unexpected pattern.


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=33711