1  /* PR tree-optimization/79352 - -fprintf-return-value doesn't handle
       2     flexible-like array members properly
       3     { dg-do compile }
       4     { dg-options "-O2 -fdump-tree-optimized -fno-ipa-icf" } */
       5  
       6  struct A { int i; char a1[1]; };
       7  struct B { int i; char a3[3]; };
       8  struct C { int i; char ax[]; };
       9  
      10  int test_array_1 (int i, struct A *a)
      11  {
      12    return __builtin_snprintf (0, 0, "%-s", a->a1);
      13  }
      14  
      15  int test_array_3 (int i, struct B *b)
      16  {
      17    return __builtin_snprintf (0, 0, "%-s", b->a3);
      18  }
      19  
      20  int test_array_1_3 (int i, struct A *a, struct B *b)
      21  {
      22    return __builtin_snprintf (0, 0, "%-s", i ? a->a1 : b->a3);
      23  }
      24  
      25  int test_string_and_array_3 (int i, struct B *b)
      26  {
      27    return __builtin_snprintf (0, 0, "%-s", i ? "123" : b->a3);
      28  }
      29  
      30  int test_flexarray (struct C *c)
      31  {
      32    return __builtin_snprintf (0, 0, "%-s", c->ax);
      33  }
      34  
      35  int test_array_and_flexarray (int i, struct B *b, struct C *c)
      36  {
      37    return __builtin_snprintf (0, 0, "%-s", i ? b->a3 : c->ax);
      38  }
      39  
      40  int test_string_and_flexarray (int i, struct C *c)
      41  {
      42    return __builtin_snprintf (0, 0, "%-s", i ? "123" : c->ax);
      43  }
      44  
      45  /* { dg-final { scan-tree-dump-times "snprintf" 7 "optimized"} } */