[PATCH] MachineVerifier: Allow undef reads if a matching superreg is defined.

[Quentin Colombet]

Hi Matthias,

LGTM.
I guess this was failing only when sub register liveness will be enabled by default.
Could you add in the related PR the test case that we would need to commit to match-up this patch?

Thanks,
-Quentin


http://reviews.llvm.org/D6973

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