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

[Matthias Braun via Phabricator via llvm-commits]

MatzeB added a comment.

In https://reviews.llvm.org/D32563#742848, @wmi wrote:

> + Andy, for the history on pre-RA-sched and misched.


pre-RA scheduling is deprecated it should only be concerned about bringing the SelectionDAG nodes into an order. The actual scheduling decisions should be done by the MachineScheduler nowadays.

Is this pass necessary because the machine scheduler doesn't schedule instructions accross calls? Then https://reviews.llvm.org/D15667 may be related...


https://reviews.llvm.org/D32563