gcc/testsuite/gcc.dg/vect/bb-slp-49.c

   1 /* This checks that vectorized constructors have the correct ordering. */
   2 /* { dg-require-effective-target vect_int } */
   3
   4 typedef int V __attribute__((__vector_size__(16)));
   5
   6 __attribute__((__noipa__)) void
   7 foo (unsigned int x, V *y)
   8 {
   9   unsigned int a[4] = { x + 0, x + 2, x + 4, x + 6 };
  10   for (unsigned int i = 0; i < 3; ++i)
  11     if (a[i] == 1234)
  12       a[i]--;
  13   *y = (V) { a[3], a[2], a[1], a[0] };
  14 }
  15
  16 int
  17 main ()
  18 {
  19   V b;
  20   foo (0, &b);
  21   if (b[0] != 6 || b[1] != 4 || b[2] != 2 || b[3] != 0)
  22     __builtin_abort ();
  23   return 0;
  24 }
  25
  26 /* See that we vectorize an SLP instance.  */
  27 /* { dg-final { scan-tree-dump "Analyzing vectorizable constructor" "slp1" } } */
  28 /* { dg-final { scan-tree-dump "vectorizing stmts using SLP" "slp1" } } */