gcc/testsuite/gcc.dg/pr105763.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-O3" } */
   3
   4 int rl2_decode_png_bit_depth;
   5 int *rl2_decode_png_p_data;
   6 void png_destroy_read_struct ();
   7 int __attribute__((returns_twice)) _setjmp ();
   8 void rl2_decode_png_row_pointers()
   9 {
  10   unsigned sample_type = 0;
  11   _setjmp();
  12   switch (rl2_decode_png_bit_depth)
  13   case 6:
  14     sample_type = 7;
  15   png_destroy_read_struct();
  16   for (;;)
  17     switch (sample_type)
  18     case 3:
  19     case 5:
  20       *rl2_decode_png_p_data;
  21 }