Comment 8 for bug 1270789

Here is a reduced testcase:
static unsigned long global_max_fast;
int __libc_mallopt (int param_number, int value)
{
 __asm__ __volatile__ ("# %[_SDT_A2]" :: [_SDT_A2] "nor" ((global_max_fast)));
 global_max_fast = 1;
}