[PATCH] D38128: Handle COPYs of physregs better (regalloc hints)

[Eli Friedman via Phabricator via llvm-commits]

efriedma added a comment.

> Not sure if it is clear that coalescing with %R8 is generally better than %R0.

What do you mean, it isn't clear?  Is the performance problem not clear?  Or do you mean you're not sure how to detect this situation when you're sorting the hints?


https://reviews.llvm.org/D38128