gcc/testsuite/gcc.dg/Wstringop-overflow-10.c

   1 /* PR tree-optimization/89500 - ICE: tree check: expected integer_cst,
   2    have ssa_name in get_len
   3    { dg-do compile }
   4    { dg-options "-O2 -Wstringop-overflow -Wstringop-truncation" } */
   5
   6 void
   7 foo (char *a)
   8 {
   9   char b[16] = "abcdefg";
  10   __builtin_strncpy (a, b, __builtin_strlen (b));       /* { dg-warning "specified bound depends on the length of the source argument" } */
  11 }
  12
  13 void
  14 bar (char *a)
  15 {
  16   char b[16] = "abcdefg";
  17   __builtin_strncpy (a, b, __builtin_strnlen (b, 8));   /* { dg-warning "specified bound depends on the length of the source argument" } */
  18 }
  19
  20 void
  21 baz (char *a)
  22 {
  23   char b[16] = "abcdefg";
  24   __builtin_strncpy (a, b, __builtin_strnlen (b, 7));   /* { dg-warning "output truncated before terminating nul" } */
  25 }
  26
  27 void fill (char *);
  28
  29 void
  30 qux (char *a)
  31 {
  32   char b[16];
  33   fill (b);
  34   __builtin_memcpy (b, "abcdefg", 7);
  35   __builtin_strncpy (a, b, __builtin_strnlen (b, 8));   /* { dg-bogus "specified bound depends on the length of the source argument" } */
  36 }