[llvm-dev] High memory use and LVI/Correlated Value Propagation

[Akira Hatanaka via llvm-dev]

Did it take an hour to compile the file attached to PR10584 (hugemem.ii)?

It took about 4 minutes and about 450MB of memory on my machine to compile
the file with "clang++ -O2".

On Thu, Jan 14, 2016 at 9:56 AM, Bruno Cardoso Lopes via llvm-dev <
llvm-dev at lists.llvm.org> wrote:

> Hi Joerg,
>
> > with the current trunk I have two major cases where clang needs more
> > than 2GB memory for compiling programs with -O2. One is related to GVN
> > and MemoryDependenceAnalysis and has a pending patch. The other is
> > related to the Correlated Value Propagation and Lazy Value Information
> > cache.
>
> For the LVI part, how recent are you measurements? I wonder whether
> Akira's r255320 helps.
>
> r255320 => [LazyValueInfo] Stop inserting overdefined values into
> ValueCache to reduce memory usage.
>
> --
> Bruno Cardoso Lopes
> http://www.brunocardoso.cc
> _______________________________________________
> LLVM Developers mailing list
> llvm-dev at lists.llvm.org
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>
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