gcc/testsuite/gcc.dg/tree-ssa/tailcall-3.c

   1 /* The return argument needs a type conversion which on some targets
   2    (e.g. s390) needs additional code.  So it is invalid to do tail
   3    call optimization here.  */
   4
   5 /* { dg-do compile } */
   6 /* { dg-options "-O2" } */
   7
   8 extern void abort (void);
   9
  10 long long __attribute__((noinline))
  11 foo ()
  12 {
  13   return 3;
  14 }
  15
  16 int __attribute__((noinline))
  17 boo ()
  18 {
  19   return foo ();
  20 }
  21
  22 int
  23 main ()
  24 {
  25   if (boo () != 3)
  26     abort ();
  27 }
  28