gcc-4.9/gcc/testsuite/gcc.dg/Wstrict-overflow-23.c


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/* { dg-do compile } */
/* { dg-options "-O2 -Wstrict-overflow" } */

unsigned int
do_scrolling (unsigned int window_size, unsigned int writecost)
{
  unsigned int i = window_size;

  int terminal_window_p = 0;
  unsigned int queue = 0;

  for (i = window_size; i; i--)
    {
      if (writecost < i)
    ++queue;
      else if (writecost & 1)
    terminal_window_p = 1;
    }

  if (queue > 0)
    {
      if (!terminal_window_p)
    {
      terminal_window_p = 1;
    }
    }

  if (terminal_window_p)
    return 100;
  return 0;
}