gcc/testsuite/gcc.dg/trampoline-1.c

   1 /* PR target/12865 */
   2 /* Origin: Waldek Hebisch <hebisch@math.uni.wroc.pl> */
   3
   4 /* { dg-do run } */
   5 /* { dg-options "-O2" } */
   6
   7 /* This used to fail on various versions of Solaris 2 because the
   8    trampoline couldn't be made executable.  */
   9
  10 extern void abort(void);
  11 extern double fabs(double);
  12
  13 void foo (void)
  14 {
  15   const int correct[1100] = {1, 0, -2, 0, 1, 0, 1, -1, -10, -30, -67};
  16   int i;
  17
  18   double x1 (void) {return 1; }
  19   double x2 (void) {return -1;}
  20   double x3 (void) {return -1;}
  21   double x4 (void) {return 1; }
  22   double x5 (void) {return 0; }
  23
  24   typedef double pfun(void);
  25
  26   double a (int k, pfun x1, pfun x2, pfun x3, pfun x4, pfun x5)
  27   {
  28     double b (void)
  29     {
  30       k = k - 1;
  31       return a (k, b, x1, x2, x3, x4 );
  32     }
  33
  34     if (k <= 0)
  35       return x4 () + x5 ();
  36     else
  37       return b ();
  38   }
  39
  40   for (i=0; i<=10; i++)
  41   {
  42     if (fabs(a( i, x1, x2, x3, x4, x5 ) - correct [i]) > 0.1)
  43       abort();
  44   }
  45 }
  46
  47 int main (void)
  48 {
  49   foo ();
  50   return 0;
  51 }