gcc/testsuite/gcc.dg/tree-ssa/builtin-snprintf-2.c

   1 /* PR middle-end/79496 - call to snprintf with non-zero size eliminated
   2    with -Wformat-truncation=2
   3    { dg-do compile }
   4    { dg-options "-O2 -Wall -Wformat-truncation=2 -fprintf-return-value -fdump-tree-optimized" } */
   5
   6 char d[2];
   7
   8 int test_cst (unsigned n)
   9 {
  10   if (1 < n)
  11     n = 0;
  12
  13   return __builtin_snprintf (d, n, "%d", 1);
  14 }
  15
  16 int test_var (char *d, unsigned n)
  17 {
  18   if (2 < n)
  19     n = 0;
  20
  21   return __builtin_snprintf (d, n, "%i", 1);
  22 }
  23
  24 /* { dg-final { scan-tree-dump-times "snprintf" 2 "optimized"} } */