[Bug tree-optimization/81740] [7 Regression] wrong code at -O3 in both 32-bit and 64-bit modes on x86_64-linux-gnu

2019-09-05 Thread rguenth at gcc dot gnu.org 
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81740

Richard Biener  changed:

   What|Removed |Added

 Status|ASSIGNED|RESOLVED
  Known to work||7.4.1
 Resolution|--- |FIXED
  Known to fail||7.4.0

--- Comment #14 from Richard Biener  ---
Fixed.

[Bug tree-optimization/81740] [7 Regression] wrong code at -O3 in both 32-bit and 64-bit modes on x86_64-linux-gnu

2019-09-04 Thread rguenth at gcc dot gnu.org 
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81740

--- Comment #13 from Richard Biener  ---
Author: rguenth
Date: Wed Sep  4 11:56:15 2019
New Revision: 275372

URL: https://gcc.gnu.org/viewcvs?rev=275372=gcc=rev
Log:
2019-09-04  Richard Biener  

Backport from mainline
2019-03-26  Bin Cheng  

PR tree-optimization/81740
* tree-vect-data-refs.c (vect_analyze_data_ref_dependence):
In case of outer loop vectorization, check for backward dependence
at the inner loop if outer loop dependence is reversed.

* gcc.dg/vect/pr81740-1.c: New testcase.
* gcc.dg/vect/pr81740-2.c: Likewise.

Added:
branches/gcc-7-branch/gcc/testsuite/gcc.dg/vect/pr81740-1.c
branches/gcc-7-branch/gcc/testsuite/gcc.dg/vect/pr81740-2.c
Modified:
branches/gcc-7-branch/gcc/ChangeLog
branches/gcc-7-branch/gcc/testsuite/ChangeLog
branches/gcc-7-branch/gcc/tree-vect-data-refs.c

[Bug tree-optimization/81740] [7 Regression] wrong code at -O3 in both 32-bit and 64-bit modes on x86_64-linux-gnu

2019-09-02 Thread clyon at gcc dot gnu.org 
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81740

Christophe Lyon  changed:

   What|Removed |Added

 CC||clyon at gcc dot gnu.org

--- Comment #12 from Christophe Lyon  ---

> Added:
> branches/gcc-8-branch/gcc/testsuite/gcc.dg/tree-ssa/pr89725.c
> branches/gcc-8-branch/gcc/testsuite/gcc.dg/vect/bb-slp-pr90006.c
> branches/gcc-8-branch/gcc/testsuite/gcc.dg/vect/pr81740-1.c
> branches/gcc-8-branch/gcc/testsuite/gcc.dg/vect/pr81740-2.c

Hi Richard,
I think you need to backport r269978:
2019-03-27  Bill Schmidt  

* gcc.dg/vect/pr81740-2.c: Require vect_hw_misalign.

(FWIW I see this test failing on armeb, while it is unsupported on trunk)