[Bug target/45790] [4.6 Regression] rs6000 builtin vs LTO

["rguenther at suse dot de" <gcc-bugzilla at gcc dot gnu dot org>]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45790

--- Comment #8 from rguenther at suse dot de <rguenther at suse dot de> 2010-09-30 08:45:26 UTC ---
On Wed, 29 Sep 2010, pinskia at gcc dot gnu.org wrote:

> http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45790
> 
> Andrew Pinski <pinskia at gcc dot gnu.org> changed:
> 
>            What    |Removed                     |Added
> ----------------------------------------------------------------------------
>           Component|lto                         |target
>                Host|powerpc-apple-darwin9       |
>               Build|powerpc-apple-darwin9       |
> 
> --- Comment #4 from Andrew Pinski <pinskia at gcc dot gnu.org> 2010-09-29 17:08:53 UTC ---
> >lto1: fatal error: target specific builtin not available
> 
> PowerPC has the hook implemented, why is it failing for powerpc-darwin then?

Because

  else if (fclass == BUILT_IN_MD)
    {
      result = targetm.builtin_decl (fcode, true);
      if (!result || result == error_mark_node)
        fatal_error ("target specific builtin not available");

appearantly the ppc backends lazy construction doesn't work?  Or
target specific flags are not properly set (or recorded and
re-instantiated at link time).

Sth to investigate.