[llvm] r202224 - [SROA] Fix PR18615 with some long overdue simplifications to the bounds

[Chandler Carruth]

On Tue, Feb 25, 2014 at 7:14 PM, Chandler Carruth <chandlerc at gmail.com>wrote:

> We continue to allow loading past the end of the allocation in part to
> support cases where there is a PHI and some loads are larger than others
> and the larger ones reach past the end of the allocation. We could solve
> this a different and more conservative way, but I'm still somewhat
> paranoid about this.
>

Joerg was confused by this last sentence. What I'm trying to say is that we
could be more conservative ("strict" would be a better word) in what we
allow as a "legal" use of the alloca, but I'm still somewhat paranoid about
this tripping up latent bugs / assumptions in both frontends and
optimization passes.
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