1/* Origin: trampoline-1.c Waldek Hebisch <hebisch@math.uni.wroc.pl> */
2/* Ported to test -Wtrampolines Magnus Granberg <zorry@gentoo.org> */
3
4/* { dg-do compile } */
5/* { dg-require-effective-target trampolines } */
6/* { dg-options "-O2 -Wtrampolines" } */
7
8#ifndef NO_TRAMPOLINES
9
10/* This used to fail on various versions of Solaris 2 because the
11   trampoline couldn't be made executable.  */
12
13extern void abort(void);
14extern double fabs(double);
15
16void foo (void)
17{
18  const int correct[1100] = {1, 0, -2, 0, 1, 0, 1, -1, -10, -30, -67};
19  int i;
20
21  double x1 (void) {return 1; }
22  double x2 (void) {return -1;}
23  double x3 (void) {return -1;}
24  double x4 (void) {return 1; }
25  double x5 (void) {return 0; }
26
27  typedef double pfun(void);
28
29  double a (int k, pfun x1, pfun x2, pfun x3, pfun x4, pfun x5)
30  {
31    double b (void)  /* { dg-warning "trampoline generated for nested function 'b'" } */
32    {
33      k = k - 1;
34      return a (k, b, x1, x2, x3, x4 );
35    }
36
37    if (k <= 0)
38      return x4 () + x5 ();
39    else
40      return b ();
41  }
42
43  for (i=0; i<=10; i++)
44  {
45    if (fabs(a( i, x1, x2, x3, x4, x5 ) - correct [i]) > 0.1)
46      abort();
47  }
48}
49#endif
50
51int main (void)
52{
53#ifndef NO_TRAMPOLINES
54  foo ();
55#endif
56  return 0;
57}
58