gcc/testsuite/gcc.dg/fold-perm.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-O -fdump-tree-fre1" } */
   3
   4 typedef int veci __attribute__ ((vector_size (4 * sizeof (int))));
   5
   6 void fun (veci *f, veci *g, veci *h, veci *i)
   7 {
   8   veci m = { 7, 7, 4, 6 };
   9   veci n = { 0, 1, 2, 3 };
  10   veci p = { 1, 1, 7, 6 };
  11   *i = __builtin_shuffle (*i,  p, m);
  12   *h = __builtin_shuffle (*h, *h, p);
  13   *g = __builtin_shuffle (*f, *g, m);
  14   *f = __builtin_shuffle (*f, *g, n);
  15 }
  16
  17 /* { dg-final { scan-tree-dump "VEC_PERM_EXPR.*{ 3, 3, 0, 2 }" "fre1" } } */
  18 /* { dg-final { scan-tree-dump "VEC_PERM_EXPR.*{ 1, 1, 3, 2 }" "fre1" } } */
  19 /* { dg-final { scan-tree-dump-times "VEC_PERM_EXPR" 2 "fre1" } } */