gcc/testsuite/gcc.dg/store_merging_4.c

   1 /* { dg-do compile } */
   2 /* { dg-require-effective-target non_strict_align } */
   3 /* { dg-options "-O2 -fdump-tree-store-merging" } */
   4
   5 /* Check that we can merge interleaving stores that are guaranteed
   6    to be non-aliasing.  */
   7
   8 struct bar
   9 {
  10   int a;
  11   char b;
  12   char c;
  13   short d;
  14   char e;
  15   char f;
  16   char g;
  17 };
  18
  19 void
  20 foozero (struct bar *restrict p, struct bar *restrict p2)
  21 {
  22   p->b = 0xff;
  23   p2->b = 0xa;
  24   p->a = 0xfffff;
  25   p2->a = 0xab;
  26   p2->c = 0xc;
  27   p->c = 0xff;
  28   p2->d = 0xbf;
  29   p->d = 0xfff;
  30 }
  31
  32 /* { dg-final { scan-tree-dump-times "Merging successful" 2 "store-merging" } } */