gcc/testsuite/gcc.dg/vect/fast-math-slp-38.c

   1 /* { dg-do compile } */
   2 /* { dg-require-effective-target vect_double } */
   3
   4 double self[1024];
   5 double a[1024][1024];
   6 double b[1024];
   7
   8 void __attribute__((noinline,noclone))
   9 foo (void)
  10 {
  11   int i, j;
  12   for (i = 0; i < 1024; i+=6)
  13     for (j = 0; j < 1024; j+=6)
  14       {
  15         self[i] = self[i] + a[i][j]*b[j];
  16         self[i+1] = self[i+1] + a[i][j+1]*b[j+1];
  17       }
  18 }
  19
  20 /* { dg-final { scan-tree-dump-times "vectorized 1 loops" 1 "vect" } } */
  21 /* { dg-final { scan-tree-dump-times "vectorizing stmts using SLP" 1 "vect" { target { ! vect_strided6 } } } } */