gcc/testsuite/gcc.dg/store_merging_27.c

   1 /* PR tree-optimization/88709 */
   2 /* { dg-do run } */
   3 /* { dg-require-effective-target store_merge } */
   4 /* { dg-options "-O2 -fdump-tree-store-merging-details" } */
   5 /* { dg-final { scan-tree-dump "New sequence of \[12] stores to replace old one of 3 stores" "store-merging" } } */
   6
   7 struct S { char buf[8]; };
   8
   9 __attribute__((noipa)) void
  10 bar (struct S *x)
  11 {
  12   int i;
  13   for (i = 0; i < 8; i++)
  14     if (x->buf[i] != ((i == 1) + (i == 3) * 2))
  15       __builtin_abort ();
  16 }
  17
  18 int
  19 main ()
  20 {
  21   __attribute__((aligned(8))) struct S s = {};
  22   s.buf[1] = 1;
  23   s.buf[3] = 2;
  24   bar (&s);
  25   return 0;
  26 }