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

   1 /* { dg-options "-O2 -msoft-stack" } */
   2 /* { dg-do run } */
   3
   4 /* See also 'gcc.target/nvptx/alloca-5.c'.  */
   5
   6 static __attribute__((noinline,noclone)) int f(int *p)
   7 {
   8   return __sync_lock_test_and_set(p, 1);
   9 }
  10
  11 static __attribute__((noinline,noclone)) int g(int n)
  12 {
  13   /* Check that variable-length stack allocation works.  */
  14   int v[n];
  15   v[0] = 0;
  16   /* Check that atomic operations can be applied to auto data.  */
  17   return f(v) == 0 && v[0] == 1;
  18 }
  19
  20 int main()
  21 {
  22   if (!g(1))
  23     __builtin_abort();
  24   return 0;
  25 }