LDC is explicitly mentioned in the LLVM 3.3 Release Notes [0]. In contrast to other frontends, LDC seems to follow upstream much more closely (or maybe is forced to due to bugs?).
Anyhow, kudos to David Nadlinger and whoever else was involved! [0] http://llvm.org/releases/3.3/docs/ReleaseNotes.html#ldc-the-llvm-based- d-compiler
