gcc/testsuite/gcc.dg/tree-ssa/pr83198.c

   1 /* PR tree-optimization/83198 */
   2 /* { dg-do compile { target __float128 } } */
   3 /* { dg-options "-O2 -fprintf-return-value -Wno-format -fdump-tree-optimized" } */
   4 /* { dg-add-options __float128 } */
   5
   6 void bar (void);
   7 void link_error (void);
   8
   9 void
  10 foo (char *x, double y)
  11 {
  12   /* The expected result should not be constant but rather that
  13      of the %f directive with an unknown argument, i.e., at least
  14      [3, 317] (but in reality [3, 322] when taking into account
  15      that the decimal point can be up to MB_LEN_MAX bytes long).  */
  16   int a = __builtin_sprintf (x, "%f", 1.0Q);
  17   if (a < 3)
  18     link_error ();
  19   if (a > 13)
  20     bar ();
  21   if (a > 322)
  22     link_error ();
  23 }
  24
  25 /* Verify we don't optimize return value to [3, 13].  */
  26 /* { dg-final { scan-tree-dump-not "link_error \\(\\);" "optimized" } } */
  27 /* { dg-final { scan-tree-dump "bar \\(\\);" "optimized" } } */