Bug fix in Combine load store with null pointer

[Philip Reames]

Submitted as revision 224961.


On 12/28/2014 08:27 AM, Raoux, Thomas F wrote:
>
> Hi,
>
> Could someone review and commit the patch attached? This fixes a bug 
> in instruction combine pass. The code assumed null pointer cannot be 
> dereferenced even though it should only be true for address space 0.
>
> The bug is discussed in this thread: 
> http://lists.cs.uiuc.edu/pipermail/llvmdev/2014-December/079802.html
>
> Cheers,
>
> Thomas
>
>
>
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