[Bug tree-optimization/57521] [4.7/4.8/4.9 Regression] wrong code for expressions in loop at -O3

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57521

--- Comment #3 from Richard Biener rguenth at gcc dot gnu.org ---
It's if-conversion (we do not vectorize anything here).  The predicates
are inserted correctly but the wrong ones are being used for the
predication.  That is because the predecessor edge we chose in
find_phi_replacement_condition is not fallthru and thus the predicate
we chose is bogus.  It seems to assume that critical edges are split.

I have a patch.

[Bug tree-optimization/57521] [4.7/4.8/4.9 Regression] wrong code for expressions in loop at -O3

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57521

Richard Biener rguenth at gcc dot gnu.org changed:

   What|Removed |Added

 Status|NEW |ASSIGNED
   Assignee|unassigned at gcc dot gnu.org  |rguenth at gcc dot 
gnu.org

--- Comment #2 from Richard Biener rguenth at gcc dot gnu.org ---
Hmhm, mine.

[Bug tree-optimization/57521] [4.7/4.8/4.9 Regression] wrong code for expressions in loop at -O3

[jakub at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57521

Jakub Jelinek jakub at gcc dot gnu.org changed:

   What|Removed |Added

 Status|UNCONFIRMED |NEW
   Last reconfirmed||2013-06-04
 CC||jakub at gcc dot gnu.org
   Target Milestone|--- |4.7.4
Summary|wrong code for expressions  |[4.7/4.8/4.9 Regression]
   |in loop at -O3  |wrong code for expressions
   ||in loop at -O3
 Ever confirmed|0   |1

--- Comment #1 from Jakub Jelinek jakub at gcc dot gnu.org ---
Started with r175704 aka PR46787.