Nicolai Hähnle b37db11d95 MachineSSAUpdater: Allow initialization with just a register class ...

The register class is required for inserting PHIs, but the "current
virtual register" isn't actually used for anything, so let's remove it
while we're at it.

Differential Revision: https://reviews.llvm.org/D85602

Change-Id: I1e647f31570ef21a7ea8e20db3454178e98a6a8b

2020-08-21 23:04:35 +02:00

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