gcc/testsuite/gcc.dg/Wstringop-truncation-6.c

   1 /* PR tree-optimization/88659 - ICE in maybe_warn_nonstring_arg
   2    { dg-do compile }
   3    { dg-options "-O0 -Wall" }  */
   4
   5 const char a[5] = "1234";
   6
   7 int cst_idx_cst_bnd (void)
   8 {
   9   return __builtin_strnlen (&a[1], 0);
  10 }
  11
  12 int var_idx_cst_bnd (void)
  13 {
  14   int i = 1;
  15   return __builtin_strnlen (&a[i], 0);
  16 }
  17
  18 int phi_idx_cst_bnd (int i)
  19 {
  20   return __builtin_strnlen (&a[i ? 1 : 2], 0);
  21 }
  22
  23 int unk_idx_cst_bnd (int i)
  24 {
  25   return __builtin_strnlen (&a[i], 0);
  26 }
  27
  28 int cst_idx_var_bnd (void)
  29 {
  30   int n = 0;
  31   return __builtin_strnlen (&a[1], n);
  32 }
  33
  34 int cst_idx_phi_bnd (int n)
  35 {
  36   return __builtin_strnlen (&a[1], n ? 1 : 2);
  37 }
  38
  39 int cst_idx_unk_bnd (int n)
  40 {
  41   return __builtin_strnlen (&a[1], n);
  42 }