[PATCH] D158503: [CGP] Remove dead PHI nodes before elimination of mostly empty blocks

[Eli Friedman via Phabricator via llvm-commits]

efriedma added a comment.

AArch64 changes look fine; it looks like atomic lowering is generating weird code that gets simplified here.  (It was mostly getting simplified anyway, but after register allocation, so the register couldn't be eliminated.)


CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D158503/new/

https://reviews.llvm.org/D158503