[PATCH] BumpPtr allocate SimpleReferences

[Rui Ueyama]

I think the other way is to pass a custom Allocator backed by a BumpPtr owned by File to std::vector owned by DefinedAtom, so that the vector in a DefinedAtom is freed when the file is deleted. I'd expect it would be faster than the linked list (because of better memory locality). Also could eliminate the copy-to-vector-and-sort code.

http://reviews.llvm.org/D6518