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

[iains at gcc dot gnu.org]

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

--- Comment #6 from Iain Sandoe <iains at gcc dot gnu.org> 2010-09-29 17:26:51 UTC ---
(In reply to comment #5)
> rs6000_builtin_decl should be working correctly.

Indeed, 
I suspect it is because we patch the builtin names to append $LDBL128 for the
case that we have 128bit long doubles.   However, I've not had a chance to
investigate why that patching process does not result in a correctly emitted
builtin (or maybe the target needs to get to opportunity to do so in lto).