gcc/testsuite/gcc.dg/builtin-return-1.c

   1 /* PR middle-end/11151 */
   2 /* Originator: Andrew Church <gcczilla@achurch.org> */
   3 /* { dg-do run } */
   4
   5 /* This used to fail on SPARC because the (undefined) return
   6    value of 'bar' was overwriting that of 'foo'.  */
   7
   8 extern void abort(void);
   9
  10 int foo(int n)
  11 {
  12   return n+1;
  13 }
  14
  15 int bar(int n)
  16 {
  17   __builtin_return(__builtin_apply((void (*)(void))foo, __builtin_apply_args(), 64));
  18 }
  19
  20 char *g;
  21
  22 int main(void)
  23 {
  24   /* Allocate 64 bytes on the stack to make sure that __builtin_apply
  25      can read at least 64 bytes above the return address.  */
  26   char dummy[64];
  27
  28   g = dummy;
  29
  30   if (bar(1) != 2)
  31     abort();
  32
  33   return 0;
  34 }