[LLVMdev] LLVM 3.4 performance regressed?

[Jonas Wagner]

Hi,

One reason for the regression might be that the SROA pass is now used
instead of mem2reg; consider replacing your use of mem2reg by SROA.

I also think it's meaningless to talk about performance without actually
enabling any optimization passes. You mention "Inlining failed?" but don't
enable any passes that would inline functions. If performance matters for
you, consider using -O3 or a similar flag.

Best,
Jonas


On Mon, Apr 7, 2014 at 4:05 AM, Jens Tröger <jens.troeger at light-speed.de>
wrote:
>
> Hi,
>
> It was suggested that I post my question regarding a LLVM 3.4 performance
> regression to this mailing list, rather than stackoverflow.  So here is
> the link:
>
>
https://stackoverflow.com/questions/22902034/llvm-3-4-performance-regressed
>
> Thanks :)
> Jens
>
> --
> Jens Tröger
> http://savage.light-speed.de/
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