[PATCH] Handle big index in getelementptr instruction

[Chilledheart]

In http://reviews.llvm.org/D8219#158348, @chfast wrote:

> The fix was applied to generic CodeGen and is target independent. But it looks like the test case revealed bugs in target-specific code for some other targets. It looks like the crashes discovered are similar to the one I fixed - the assumption that GEP index is never bigger than 64 bit.
>
> I can take a deeper look at that if you want.


Hi chfast,

These revealed bugs seem probably unrelated with this fix, so we can just submit them into the bugzilla. But if it doesn't take you much time, please go ahead. Anyway, either is fine with me.

Cheers,
Chilledheart


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