[PATCH] D110561: [AArch64] Alter arith-cbz-fusion to fuse between pairs register instructions

[Matthias Braun via Phabricator via llvm-commits]

MatzeB added a comment.

> This code adds an SDep::Artificial dependency between the instruction and ExitSU:

But ExitSU is an artificial node not an to mark the end of the schedule graph. I don't think it makes sense trying to macro-fuse ExitSU with anything.

The thing that is odd with this diff is that it adds extra checks to one particular rule (`isArithmeticCbzPair`) while it seems to me that if this is required, then all the other rules are problematic in the same sense; so we'd better understand why and find a general fix.


CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D110561/new/

https://reviews.llvm.org/D110561