[PATCH] D52109: [TwoAddressInstructionPass] Don't update SrcRegMap for copies inserted for tied register constraint when the src isn't killed

[Craig Topper via Phabricator via llvm-commits]

craig.topper added a comment.

Based on what happened in psubus.ll I'm not sure if this is the right fix. We lost the information that was making it make the correct decision. Maybe we really need another heuristic in the commute decision making code.


Repository:
  rL LLVM

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D52109/new/

https://reviews.llvm.org/D52109