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activated
2015 Jan 12
4
[LLVMdev] Separating loop nests based on profile information?
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> 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