[PATCH] D32563: Add LiveRangeShrink pass to shrink live range within BB.

[Andrew Trick via Phabricator via llvm-commits]

atrick added a comment.

Why are the adds "sunk down" in the first place? Is this reassociation at work?

Machine global code motion, using MachineTraceMetrics and RegisterPressure would be awesome. Nobody really followed through with implementing it so unfortunately there's no switch to turn on to try it.


https://reviews.llvm.org/D32563