[Bug tree-optimization/55812] Unnecessary TLS accesses

[pinskia at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55812

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2012-12-26
          Component|target                      |tree-optimization
     Ever Confirmed|0                           |1
           Severity|normal                      |enhancement

--- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> 2012-12-26 21:57:12 UTC ---
The issue is rather the call to _ZTH1v ( __tls_init) than anything else.
So it is not TLS accesses which are expensive but rather making sure the
thread_local variable has been initialized.

I think Jason had proposed an attribute for these function calls but it was
rejected IIRC.