The problem is quite real, it's just bitten us with some ARM changes.
The fact that we don't have types for libcall function args is very
unfortunate. Maybe that's something we need to change? It would be a
much better fix, and it might not even be _that_ much work to add an
optional type field to each optab entry, which could then be passed to
emit_library_call - if it's nonnull, we'd use the normal
promote_function_mode hook otherwise ignore the problem as before. This
would allow us to solve the s390 problem reasonably quickly and lets us
add more libcall types later.
If it is not for ABI differences anymore what's the reason for
handling libcalls differently from normal calls anymore? Couldn't we
get rid of all the special handling and deal with them like normal
calls?
Bye,
-Andreas-
