[PATCH] Handle big index in getelementptr instruction for AArch64FastISel

[Tim Northover]

I think it's reasonable with just the AArch64 test added.

I'm not a massive fan of the way the test is written in general, but it might actually allow it to live in test/Generic once R600 is fixed.

Tim.


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  rL LLVM

http://reviews.llvm.org/D9140

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