[patch] fix loopvectorizer bug with multiple address spaces PR16306

[Eli Friedman]

I forwarded this to llvm-commits.  Please pay attention to which list you
are sending a patch to.

-Eli

On Mon, Jun 17, 2013 at 8:06 AM, Pekka Jääskeläinen <
pekka.jaaskelainen at tut.fi> wrote:

> Hello,
>
> Attached patch fixes a severe regression caused by LoopVectorizer when
> vectorizing loops with memory accesses to non-zero address spaces. It
> simply drops the AS info. It's a rather nasty problem as there is no
> way (at least known to me) to disable the loop vectorizer *only* from
> clang/opt command line.
>
> Seems like an obvious fix.
>
> http://llvm.org/bugs/show_bug.**cgi?id=16306<http://llvm.org/bugs/show_bug.cgi?id=16306>
>
> The patch applies to trunk and 3.3 branches. Tom, could you apply
> this to the (upcoming?) 3.3 maintenance branch as well?
>
> Thanks,
> --
> --Pekka
>
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