gcc/testsuite/gcc.dg/torture/builtin-sprintf.c

   1 /* PR tree-optimization/86274 - SEGFAULT when logging std::to_string(NAN)
   2    { dg-do run }
   3    { dg-options "-O2 -Wall" } */
   4
   5 #define X        "0xdeadbeef"
   6 #define nan(x)   __builtin_nan (x)
   7
   8 volatile double nan_0 = nan ("0");
   9 volatile double nan_x = nan (X);
  10
  11 int main (void)
  12 {
  13   char buf[80];
  14
  15   /* Verify that folded results match those of the library calls.  */
  16   int cst_n_0 = __builtin_sprintf (buf, "%g", nan ("0"));
  17   int cst_n_x = __builtin_sprintf (buf, "%g", nan (X));
  18
  19   int var_n_0 = __builtin_sprintf (buf, "%g", nan_0);
  20   int var_n_x = __builtin_sprintf (buf, "%g", nan_x);
  21
  22   if (cst_n_0 != var_n_0)
  23     __builtin_abort ();
  24
  25   if (cst_n_x != var_n_x)
  26     __builtin_abort ();
  27
  28   return 0;
  29 }