gcc/testsuite/gcc.dg/tree-ssa/ssa-dse-14.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-O -fdump-tree-dse1-details" } */
   3
   4 struct A { char c[4]; } a, b;
   5
   6 void
   7 f1 (void)
   8 {
   9   a.c[2] = '\0';
  10   __builtin_memset (&a.c[1], 1, 2);
  11 }
  12
  13 void
  14 f2 (void)
  15 {
  16   __builtin_memcpy (&a.c[0], "a", 1);
  17   __builtin_memcpy (&a, &b, 3);
  18 }
  19
  20 /* { dg-final { scan-tree-dump-times "Deleted dead store" 2 "dse1" } } */