[Bug tree-optimization/58955] [4.9 Regression] wrong code at -O3 on x86_64-linux-gnu

2013-11-08 Thread rguenth at gcc dot gnu.org 
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58955

--- Comment #6 from Richard Biener rguenth at gcc dot gnu.org ---
Author: rguenth
Date: Fri Nov  8 08:44:02 2013
New Revision: 204561

URL: http://gcc.gnu.org/viewcvs?rev=204561root=gccview=rev
Log:
2013-11-08  Richard Biener  rguent...@suse.de

PR tree-optimization/59038
PR tree-optimization/58955
* tree-loop-distribution.c (pg_add_dependence_edges): Revert
previous change.  Handle known dependences correctly.

* gcc.dg/torture/pr59038.c: New testcase.

Added:
trunk/gcc/testsuite/gcc.dg/torture/pr59038.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/tree-loop-distribution.c

[Bug tree-optimization/58955] [4.9 Regression] wrong code at -O3 on x86_64-linux-gnu

2013-11-05 Thread rguenth at gcc dot gnu.org 
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58955

--- Comment #4 from Richard Biener rguenth at gcc dot gnu.org ---
Author: rguenth
Date: Tue Nov  5 15:08:43 2013
New Revision: 204398

URL: http://gcc.gnu.org/viewcvs?rev=204398root=gccview=rev
Log:
2013-11-05  Richard Biener  rguent...@suse.de

PR tree-optimization/58955
* tree-loop-distribution.c (pg_add_dependence_edges): Fix
edge direction.

* gcc.dg/torture/pr58955-1.c: New testcase.
* gcc.dg/torture/pr58955-2.c: Likewise.

Added:
trunk/gcc/testsuite/gcc.dg/torture/pr58955-1.c
trunk/gcc/testsuite/gcc.dg/torture/pr58955-2.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-loop-distribution.c

[Bug tree-optimization/58955] [4.9 Regression] wrong code at -O3 on x86_64-linux-gnu

2013-11-05 Thread rguenth at gcc dot gnu.org 
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58955

Richard Biener rguenth at gcc dot gnu.org changed:

   What|Removed |Added

 Status|ASSIGNED|RESOLVED
 Resolution|--- |FIXED

--- Comment #5 from Richard Biener rguenth at gcc dot gnu.org ---
Fixed.

[Bug tree-optimization/58955] [4.9 Regression] wrong code at -O3 on x86_64-linux-gnu

2013-11-04 Thread rguenth at gcc dot gnu.org 
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58955

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 #3 from Richard Biener rguenth at gcc dot gnu.org ---
Mine.

[Bug tree-optimization/58955] [4.9 Regression] wrong code at -O3 on x86_64-linux-gnu

2013-11-02 Thread su at cs dot ucdavis.edu 
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58955

--- Comment #2 from Zhendong Su su at cs dot ucdavis.edu ---
Here is another testcase that seems related (also goes away with
-fno-tree-loop-distribute-patterns.  




int printf (const char *, ...);

int a, b[10];

int
main ()
{
  for (; a  2; a++)
{
  b[a] = 1;
  b[a + 1] = 0;
}
  printf (%d\n, b[1]);
  return 0;
}

[Bug tree-optimization/58955] [4.9 Regression] wrong code at -O3 on x86_64-linux-gnu

2013-11-01 Thread mpolacek at gcc dot gnu.org 
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58955

Marek Polacek mpolacek at gcc dot gnu.org changed:

   What|Removed |Added

 Status|UNCONFIRMED |NEW
   Last reconfirmed||2013-11-01
 CC||mpolacek at gcc dot gnu.org
   Target Milestone|--- |4.9.0
Summary|wrong code at -O3 on|[4.9 Regression] wrong code
   |x86_64-linux-gnu|at -O3 on x86_64-linux-gnu
 Ever confirmed|0   |1

--- Comment #1 from Marek Polacek mpolacek at gcc dot gnu.org ---
Confirmed.  Goes away with -fno-tree-loop-distribute-patterns.