[PATCH] D36160: Liveness issues in tail merging, and the ARM::LR saved-but-not-restored

[Krzysztof Parzyszek via Phabricator via llvm-commits]

kparzysz added a comment.

I think the problem is that LR is not really a callee-saved register in the sense that it doesn't need to (and isn't) preserved across function calls.  It is still included in the save lists returned by `getCalleeSavedRegs`.  Would it make sense to change the ARM backend to remove it from these lists?


Repository:
  rL LLVM

https://reviews.llvm.org/D36160