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

[Justin Bogner via Phabricator via llvm-commits]

bogner added a comment.

In https://reviews.llvm.org/D48154#1131901, @MatzeB wrote:

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


Ah, thanks. Updated with a version that errors instead of ignoring the problem.


https://reviews.llvm.org/D48154