[Bug testsuite/50637] New: gcc.dg/vect/vect-align-2.c is invalid (FAILs with -O2 -flto -fpeel-loops)

[Bug testsuite/50637] New: gcc.dg/vect/vect-align-2.c is invalid (FAILs with -O2 -flto -fpeel-loops)

[zsojka at seznam dot cz]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50637

             Bug #: 50637
           Summary: gcc.dg/vect/vect-align-2.c is invalid (FAILs with -O2
                    -flto -fpeel-loops)
    Classification: Unclassified
           Product: gcc
           Version: 4.7.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: testsuite
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: zsojka@seznam.cz
                CC: dorit@gcc.gnu.org


The testcase accesses an array out of bounds, causing a testsuite failure with
nondefault flags:

$ gcc gcc.dg/vect/vect-align-2.c -O2 -flto -fpeel-loops
$ ./a.out 
Aborted

The problem is:
...
#define N 17
...
int z[16] = {0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15};
...
   for (i=0; i<N; i++)
      for (j=0; j<N; j++)
        f2.y[i][j] = z[i];

   for (i=0; i<N; i++)
      for (j=0; j<N; j++)
        if (f2.y[i][j] != z[i])
          abort ();
...

z[16] is read out of bounds.


vect-align-1.c uses:
int x[N] = {0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15};
what might be a better solution

[Bug testsuite/50637] gcc.dg/vect/vect-align-2.c is invalid (FAILs with -O2 -flto -fpeel-loops)

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50637

Richard Guenther <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |RESOLVED
         Resolution|                            |FIXED

--- Comment #2 from Richard Guenther <rguenth at gcc dot gnu.org> 2011-10-07 08:29:03 UTC ---
Fixed.

[Bug testsuite/50637] gcc.dg/vect/vect-align-2.c is invalid (FAILs with -O2 -flto -fpeel-loops)

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50637

--- Comment #1 from Richard Guenther <rguenth at gcc dot gnu.org> 2011-10-07 08:28:53 UTC ---
Author: rguenth
Date: Fri Oct  7 08:28:48 2011
New Revision: 179648

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=179648
Log:
2011-10-07  Richard Guenther  <rguenther@suse.de>

    PR testsuite/50637
    * gcc.dg/vect/vect-align-2.c: Increase array size.

Modified:
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/testsuite/gcc.dg/vect/vect-align-2.c