Eric Fiselier 10b9a1bb42 Flatten the tuple_element and __make_tuple_types implementations.
This patch attempts to improve the QoI of std::tuples tuple_element and
__make_tuple_types helpers. Previously they required O(N) instantiations,
one for every element in the tuple

The new implementations are O(1) after __tuple_indices<Id...> is created.

llvm-svn: 274330
2016-07-01 03:54:54 +00:00
..