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
  12 void foo (void)
  13 {
  14   const int correct[1100] = {1, 0, -2, 0, 1, 0, 1, -1, -10, -30, -67};
  15   int i;
  16
  17   double x1 (void) {return 1; }
  18   double x2 (void) {return -1;}
  19   double x3 (void) {return -1;}
  20   double x4 (void) {return 1; }
  21   double x5 (void) {return 0; }
  22
  23   typedef double pfun(void);
  24
  25   double a (int k, pfun x1, pfun x2, pfun x3, pfun x4, pfun x5)
  26   {
  27     double b (void)
  28     {
  29       k = k - 1;
  30       return a (k, b, x1, x2, x3, x4 );
  31     }
  32
  33     if (k <= 0)
  34       return x4 () + x5 ();
  35     else
  36       return b ();
  37   }
  38
  39   for (i=0; i<=10; i++)
  40   {
  41     if (fabs(a( i, x1, x2, x3, x4, x5 ) - correct [i]) > 0.1)
  42       abort();
  43   }
  44 }
  45
  46 int main (void)
  47 {
  48   foo ();
  49   return 0;
  50 }