LLVM has a decent amount of documentation on integrating garbage collection, not on how to write one though. Some more advanced GC integration functionality wa

LLVM has a decent amount of documentation on integrating garbage collection, not on how to write one though. Some more advanced GC integration functionality was added more recently because of the work on Webkit's FTL JIT: http://llvm.org/docs/Statepoints.html http://llvm.org/docs/Statepoints.html