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On Jul 6, 2011, at 3:24 PM, Talin wrote: > Overall Proposal: Support marking SSA values as roots (an evolutionary approach) > > My proposal consists of three rather significant changes to LLVM: > Allow frontends to mark SSA values - or even portions of SSA values - as stack roots. > For alloca roots, add a way to communicate to LLVM when a root goes out of scope. > Transfer the

*Motivation & Abstract* It has been observed by a number of LLVM users that the current garbage collection framework requires frontends to generate complex and inefficient code. This is primarily due to the fact that only allocas can be stack roots - it is not possible to trace SSA values directly. Because of this limitation, a frontend wanting to support garbage collection has to manually