gcc/testsuite/gcc.dg/tree-ssa/pr86017.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-O2 -fno-tree-vectorize -fdump-tree-store-merging" } */
   3
   4 void f (void*);
   5
   6 void g (void)
   7 {
   8   char a[8];
   9   __builtin_memset (a, 0, 8);
  10
  11   f (a);
  12 }
  13
  14 void h (void)
  15 {
  16   char a[8];
  17   __builtin_memset (a, 0, 1);
  18   __builtin_memset (a + 1, 0, 1);
  19   __builtin_memset (a + 2, 0, 1);
  20   __builtin_memset (a + 3, 0, 1);
  21   __builtin_memset (a + 4, 0, 1);
  22   __builtin_memset (a + 5, 0, 1);
  23   __builtin_memset (a + 6, 0, 1);
  24   __builtin_memset (a + 7, 0, 1);
  25
  26   f (a);
  27 }
  28
  29 /* { dg-final { scan-tree-dump "Merged into 1 stores" "store-merging" } } */