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On 7/6/2011 6:24 PM, Talin wrote: > The LLVM code generators and analysis passes have a much more thorough > knowledge of SSA value lifetimes than frontends do, and therefore > could avoid spilling and reloading of values when it wasn't needed. Although this would indeed be nice, it is not done by similar platforms in practice. I have investigated [very] briefly into whether the

...and in registers are automatically GC roots. Unlike LLVM, the JVM (and I think the CLR) doesn't even have a concept of a non-GC pointer. Sebastian -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.llvm.org/pipermail/llvm-dev/attachments/20110707/789d671e/attachment.html>

*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