gcc/testsuite/gcc.target/nvptx/softstack.c

   1 /* { dg-options "-O2 -msoft-stack" } */
   2 /* { dg-do run } */
   3
   4 static __attribute__((noinline,noclone)) int f(int *p)
   5 {
   6   return __sync_lock_test_and_set(p, 1);
   7 }
   8
   9 static __attribute__((noinline,noclone)) int g(int n)
  10 {
  11   /* Check that variable-length stack allocation works.  */
  12   int v[n];
  13   v[0] = 0;
  14   /* Check that atomic operations can be applied to auto data.  */
  15   return f(v) == 0 && v[0] == 1;
  16 }
  17
  18 int main()
  19 {
  20   if (!g(1))
  21     __builtin_abort();
  22   return 0;
  23 }