LLVM 3.7.1 is a little less than 10 months old. Our RC period lasts for about 3 months, the start of which is the last point we'd have possibly upgraded LLVM. U

LLVM 3.7.1 is a little less than 10 months old. Our RC period lasts for about 3 months, the start of which is the last point we'd have possibly upgraded LLVM. Upgrading LLVM is a little bit of a scary prospect for us since we find new bugs in every version (and fix them!), so though we considered moving to 3.8, 3.7 had been stable for a few months, so we didn't want to risk it. There's currently a PR to bump LLVM to 3.9 for 0.6, so I'd expect 0.6 to be released with LLVM 3.9.1.