gcc/testsuite/c-c++-common/analyzer/overlapping-buffers-pr113998.c

   1 /* Verify we don't ICE on -Wanalyzer-overlapping-buffers on
   2    execution paths where the size is constant zero, but the
   3    optimizer didn't see that.  */
   4
   5 typedef __SIZE_TYPE__ size_t;
   6
   7 extern char a[];
   8 size_t n;
   9
  10 size_t  __attribute__((noinline))
  11 get_hidden_zero ()
  12 {
  13   return 0;
  14 }
  15
  16 void
  17 test_pr113998 ()
  18 {
  19   size_t n = get_hidden_zero ();
  20   __builtin_strncpy (a, a, n); /* { dg-warning "overlapping buffers passed as arguments to" } */
  21 }