[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.

In https://reviews.llvm.org/D36160#827796, @efriedma wrote:

> If we are going to add a marking to CalleeSavedInfo, it would probably be better to add it in assignCalleeSavedSpillSlots, where we construct the CalleeSavedInfo, rather than waiting until restoreCalleeSavedRegisters.


The problem is that restoreCalleeSavedRegisters decides whether to use a pop instruction or not, which determines whether LR is restored, or loaded into PC directly.  Are you suggesting moving some of that logic into assignCalleeSavedSpillSlots?


Repository:
  rL LLVM

https://reviews.llvm.org/D36160