r305918 and "Bad machine code: Using an undefined physical register"

[Tim Northover via llvm-commits]

On 26 Jun 2017, at 11:03, Kuba Mracek <mracek at apple.com> wrote:
> Here's a minimal reproducer (preprocessed):

I definitely know what the issue is now. I've just about got a patch for it, but I'm trying to compress the reproducer down even more. Not quite sure how it was caused by the commit I pointed at, but I don't think that really matters now.

Cheers.

Tim.