[llvm] r260587 - Set load alignment on aggregate loads.

[Hans Wennborg via llvm-commits]

On Thu, Feb 11, 2016 at 1:10 PM, Pete Cooper via llvm-commits
<llvm-commits at lists.llvm.org> wrote:
> Author: pete
> Date: Thu Feb 11 15:10:40 2016
> New Revision: 260587
>
> URL: http://llvm.org/viewvc/llvm-project?rev=260587&view=rev
> Log:
> Set load alignment on aggregate loads.
>
> When optimizing a extractvalue(load), we generate a load from the
> aggregate type.  This load didn't have alignment set and so would
> get the alignment of the type.  This breaks when the type is packed
> and so the alignment should be lower.
>
> For example, loading { int, int } would give us alignment of 4, but
> the original load from this type may have an alignment of 1 if packed.
>
> Reviewed by David Majnemer
>
> Differential revision: http://reviews.llvm.org/D17158

Merged to 3.8 in r260640 as suggested on the review.

Cheers,
Hans