[PATCH][mem-ref2] Fixup some ICEs, fix simple IPA analysis passes

[Toon Moene]

Richard Guenther wrote:

> Bootstrapped and tested on x86_64-unknown-linux-gnu, applied to the
> branch.

[ This might be wrong-headed ... ]

Is the MEM_REF tree a way to carry alignment information (thus 
simplifying vectorization) ?

Cheers,

-- 
Toon Moene - e-mail: toon@moene.org - phone: +31 346 214290
Saturnushof 14, 3738 XG  Maartensdijk, The Netherlands
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