[PATCH] D28527: Check for register clobbers when merging a vreg live range with a reserved physreg in RegisterCoalescer.

[Matthias Braun via Phabricator via llvm-commits]

MatzeB added a comment.

Makes sense, I am surprised this didn't hit us before.

Could you create a .mir based test that just runs the coalescer instead of the .ll one?


https://reviews.llvm.org/D28527