[PATCH] D45695: [CodeGen] Use RegUnits to track register aliases (NFC)

[Matthias Braun via Phabricator via llvm-commits]

MatzeB added a comment.

Have you seen `LiveRegUnits::accumulate()` glancing over the code here (and earlier) it seems to me that `TII::tracksRegDefsUses()` was just invented to do the same thing: figuring out which registers are free/usable over a range of instructions...


https://reviews.llvm.org/D45695