[Bug lto/60449] Merging function DECLs discards leaf attribute which causes cfg verifier to fail

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60449

--- Comment #6 from Richard Biener <rguenth at gcc dot gnu.org> ---
OTOH, why do we have to merge the decls/cgraph nodes at all?  Can't we simply
make them aliases if tree merging decides the decls are not equal?