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 #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
  13 extern void abort(void);
  14 extern double fabs(double);
  15
  16 void 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
  51 int main (void)
  52 {
  53 #ifndef NO_TRAMPOLINES
  54   foo ();
  55 #endif
  56   return 0;
  57 }