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2015 Jan 12
4
[LLVMdev] Separating loop nests based on profile information?
> > > Looking at what LLVM does, the failing on the PRE side is that our PRE/GVN > models are not strong enough to handle this. I'm not sure at all why we > think anything else is necessary. > By this i mean we don't actually perform real PRE for loads. It's a known deficiency and one that does not require any duplicate heuristics to solve. Right now we perform some