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 /* { dg-xfail-run-if "PR36571 untyped return is char register" { "avr-*-*" } } */
   5 /* { dg-require-effective-target untyped_assembly } */
   6 /* This used to fail on SPARC because the (undefined) return
   7    value of 'bar' was overwriting that of 'foo'.  */
   8
   9 extern void abort(void);
  10
  11 int foo(int n)
  12 {
  13   return n+1;
  14 }
  15
  16 int bar(int n)
  17 {
  18   __builtin_return(__builtin_apply((void (*)(void))foo, __builtin_apply_args(), 64));
  19 }
  20
  21 char *g;
  22
  23 int main(void)
  24 {
  25   /* Allocate 64 bytes on the stack to make sure that __builtin_apply
  26      can read at least 64 bytes above the return address.  */
  27   char dummy[64];
  28
  29   g = dummy;
  30
  31   if (bar(1) != 2)
  32     abort();
  33
  34   return 0;
  35 }