[polly] [patch] [efficiency] Move getAliasSetForPointer under if (!IgnoreAliasing)

[Sebastian Pop]

Hi Dmitry,

The patch looks good to me.  Please allow Tobi to also comment on your patch
before committing.

Dmitry N. Mikushin wrote:
> -static cl::opt<bool>
> +cl::opt<bool>

Why do you remove static here? Your change does not touch any other files.

>  IgnoreAliasing("polly-ignore-aliasing",
>                 cl::desc("Ignore possible aliasing of the array bases"),
>                 cl::Hidden, cl::init(false), cl::cat(PollyCategory));


Also could you prepare a patch to disable AA with -polly-ignore-aliasing

  AA = &getAnalysisID<AliasAnalysis>(AliasAnalysis::getClassPassID());

Please test and fix any other places using AA with -polly-ignore-aliasing.

Also please add [polly] on the subject line on patches for polly.

Thanks,
Sebastian
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