[Bug tree-optimization/109164] thread_local initialization error with -ftree-pre

["pinskia at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109164

Andrew Pinski <pinskia at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|thread_local initialization |thread_local initialization
                   |error with -ftree-pre       |error with -ftree-pre
                   |-foptimize-sibling-calls    |
      Known to fail|                            |11.3.0

--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Here is a testcase which fails at `-O1 -ftree-pre` and does not need
`-foptimize-sibling-calls`:
struct Struct  {
  virtual void virtual_func();
};
extern thread_local Struct& thread_local_ref;
bool other_func(void);
bool test_func(void)
{
  while (1)
    {
      thread_local_ref.virtual_func();
      if (!other_func())
        return 0;
    }
}