gcc/testsuite/gcc.c-torture/execute/20000605-1.c

   1 typedef struct _RenderInfo RenderInfo;
   2 struct _RenderInfo
   3 {
   4     int y;
   5     float scaley;
   6     int src_y;
   7 };
   8
   9 static void bar(void) { }
  10
  11 static int
  12 render_image_rgb_a (RenderInfo * info)
  13 {
  14   int y, ye;
  15   float error;
  16   float step;
  17
  18   y = info->y;
  19   ye = 256;
  20
  21   step = 1.0 / info->scaley;
  22
  23   error = y * step;
  24   error -= ((int) error) - step;
  25
  26   for (; y < ye; y++) {
  27       if (error >= 1.0) {
  28           info->src_y += (int) error;
  29           error -= (int) error;
  30           bar();
  31       }
  32       error += step;
  33   }
  34   return info->src_y;
  35 }
  36
  37 int main (void)
  38 {
  39     RenderInfo info;
  40
  41     info.y = 0;
  42     info.src_y = 0;
  43     info.scaley = 1.0;
  44
  45     if (render_image_rgb_a(&info) != 256)
  46        abort ();
  47     exit(0);
  48 }