gcc/testsuite/gcc.dg/Wtrampolines.c

   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 /* This used to fail on various versions of Solaris 2 because the
   9    trampoline couldn't be made executable.  */
  10
  11 extern void abort(void);
  12 extern double fabs(double);
  13
  14 void foo (void)
  15 {
  16   const int correct[1100] = {1, 0, -2, 0, 1, 0, 1, -1, -10, -30, -67};
  17   int i;
  18
  19   double x1 (void) {return 1; }
  20   double x2 (void) {return -1;}
  21   double x3 (void) {return -1;}
  22   double x4 (void) {return 1; }
  23   double x5 (void) {return 0; }
  24
  25   typedef double pfun(void);
  26
  27   double a (int k, pfun x1, pfun x2, pfun x3, pfun x4, pfun x5)
  28   {
  29     double b (void)  /* { dg-warning "trampoline generated for nested function 'b'" "standard descriptors" { xfail { { ia64-*-* *-*-aix* } || { powerpc*-*-* && lp64 } } } } */
  30     {
  31       k = k - 1;
  32       return a (k, b, x1, x2, x3, x4 );
  33     }
  34
  35     if (k <= 0)
  36       return x4 () + x5 ();
  37     else
  38       return b ();
  39   }
  40
  41   for (i=0; i<=10; i++)
  42   {
  43     if (fabs(a( i, x1, x2, x3, x4, x5 ) - correct [i]) > 0.1)
  44       abort();
  45   }
  46 }
  47
  48 int main (void)
  49 {
  50   foo ();
  51
  52   return 0;
  53 }