gcc/testsuite/gcc.dg/store_merging_1.c

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