[PATCH] D42697: [GlobalISel] Fix crash due to assuming a COPY src reg has a reg class

[Amara Emerson via Phabricator via llvm-commits]

aemerson created this revision.
aemerson added reviewers: aditya_nandakumar, qcolombet.
Herald added subscribers: javed.absar, kristof.beyls, rovka.

I'm familiar with this part of the code base, is this correct?

The code was introduced originally in r323291.

rdar://36870311


Repository:
  rL LLVM

https://reviews.llvm.org/D42697

Files:
  lib/CodeGen/GlobalISel/InstructionSelect.cpp
  test/CodeGen/AArch64/GlobalISel/select-copy-norc.mir

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