It's my impression that Unladen Swallow failed because of insufficient manpower, not because of the general approach. It's true that LLVM is missing some featur

It's my impression that Unladen Swallow failed because of insufficient manpower, not because of the general approach. It's true that LLVM is missing some features for a JIT like this (mainly OSR and back-patching), but those can be added. For example, there was a discussion a few months ago on llvm-dev about adding patching support [1] (it was originally meant for garbage collectors, but would also work for JITs). 1 - http://lists.cs.uiuc.edu/pipermail/llvmdev/2013-October/066573.html http://lists.cs.uiuc.edu/pipermail/llvmdev/2013-October/0665...