gcc/testsuite/gcc.dg/pr28243.c

   1 /* PR rtl-optimization/28243 */
   2 /* Reported by Mike Frysinger <vapier@gentoo.org> */
   3
   4 /* { dg-do compile } */
   5 /* { dg-require-effective-target fpic } */
   6 /* { dg-options "-std=gnu17 -O2 -ftracer -fPIC" } */
   7
   8 struct displayfuncs {
   9   void (*init) ();
  10 } funcs;
  11
  12 struct gpsdisplay {
  13   struct displayfuncs *funcs;
  14 };
  15
  16 void PSDoArc ();
  17
  18 static void PSMyArc(double cx, double cy, double radx, double rady, double sa,
  19                     double ta)
  20 {
  21   double ea;
  22   double temp;
  23   ea = sa + ta;
  24   while (sa < ea) {
  25     temp = ((sa + 90) / 90) * 90;
  26     PSDoArc(cx, sa, ea < temp ? ea : temp);
  27     sa = temp;
  28   }
  29 }
  30
  31 static void PSDrawElipse()
  32 {
  33   float cx;
  34   float cy;
  35   float radx;
  36   float rady;
  37   if (radx != rady)
  38     PSMyArc(cx, cy, radx, rady, 0, 360);
  39 }
  40
  41 static void PSDrawFillCircle()
  42 {
  43   PSDrawElipse();
  44 }
  45
  46 static struct displayfuncs psfuncs[] = {
  47   PSDrawFillCircle
  48 };
  49
  50 void _GPSDraw_CreateDisplay()
  51 {
  52   struct gpsdisplay *gdisp;
  53   gdisp->funcs = (void *)&psfuncs;
  54 }