SmallVector and SmallPtrSet allocations not power-of-two aligned

[Sean Silva]

On Wed, Mar 27, 2013 at 5:42 PM, Jean-Luc Duprat <jduprat at apple.com> wrote:

> These changes moved all the allocations identified above to proper
> power-of-two allocations.  These changes have no impact on performance, but
> will help pool memory allocations together if needed.
>
>

Have you dug into why the existing code is written so that the end iterator
always points at valid memory? That is mentioned in multiple comments. It
seems weird to do that, but I wouldn't change it without investigating why
that was done in the first place.

-- Sean Silva
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