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

["zsojka at seznam dot cz" <gcc-bugzilla at gcc dot gnu dot org>]

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