hfinkel added a comment.

> With this patch we avoid unaligned loads and stores, at least on MIPS 
> architecture.

Can you please explain the nature of the problematic situations?

Also, this patch does not update the comments that describe the splitting 
algorithm. That should be improved.

If this is just addressing the classic problem that, once we narrow a load we 
can't re-widen it, it might be best to solve this another way (e.g., by adding 
metadata noting the dereferenceable range).


https://reviews.llvm.org/D39053



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