[PATCH] D48154: [VirtRegRewriter] Avoid clobbering registers when expanding copy bundles

[Matthias Braun via Phabricator via llvm-commits]

MatzeB added a comment.

Take a look at RAGreedy::selectOrSplit for an example on how to report fatal errors in the backend.


Repository:
  rL LLVM

https://reviews.llvm.org/D48154