LLVM/Clang 3.3 Planned For Release In June
Among the improvements to be found out of LLVM 3.3 include better Intel Haswell support (improved AVX2, etc), some noted performance improvements, Clang will have better C++11 support, the long-awaited AMD R600 GPU LLVM back-end, 64-bit ARM / AArch64 support, and many other features to be discussed in the coming weeks.
Bill Wendling's release announcement can be found on the cfe-dev list. Basically, testing will happen in May and a release will come in June. Information on branching of the code-bases and the release candidates will come later.
Right now they're planning for official releases on Mac OS X x86, Ubuntu Linux x86, FreeBSD x86, and experimental Windows support. LLVM developers also want feedback on other operating systems and CPU architectures to officially support with LLVM 3.3.