gcc/testsuite/gcc.dg/store_merging_8.c

   1 /* { dg-do compile } */
   2 /* { dg-require-effective-target store_merge } */
   3 /* { dg-options "-O2 -fdump-tree-store-merging" } */
   4
   5 struct baz {
   6   struct bar {
   7       int a;
   8       char b;
   9       char c;
  10       char d;
  11       char e;
  12       char f;
  13       char g;
  14   } a[4];
  15 } x;
  16 struct baz *xx = &x;
  17
  18 void
  19 foo1 (int i)
  20 {
  21   x.a[i].b = 0;
  22   x.a[i].a = 0;
  23   x.a[i].c = 0;
  24   x.a[i].d = 0;
  25   x.a[i].e = 0;
  26 }
  27
  28 void
  29 foo2 (int i)
  30 {
  31   x.a[i].b = 0;
  32   x.a[i].a = 0;
  33   x.a[i].c = 1;
  34   x.a[i].d = 0;
  35   x.a[i].e = 0;
  36 }
  37
  38 /* { dg-final { scan-tree-dump-times "Merging successful" 2 "store-merging" } } */