gcc/testsuite/gcc.dg/vect/bb-slp-layout-7.c

   1 /* { dg-do compile } */
   2 /* { dg-additional-options "-fno-tree-loop-vectorize" } */
   3
   4 int a[4], b[400];
   5
   6 void f1()
   7 {
   8   for (int i = 0; i < 100; ++i)
   9     {
  10       a[0] += b[i * 4 + 3];
  11       a[1] += b[i * 4 + 2];
  12       a[2] += b[i * 4 + 1];
  13       a[3] += b[i * 4 + 0];
  14     }
  15 }
  16
  17 /* { dg-final { scan-tree-dump-times "add new stmt: \[^\\n\\r\]* = VEC_PERM_EXPR" 2 "slp1" { target { vect_int && vect_perm } } } } */