[PATCH] D10909: PrologEpilogInserter: Improve API to determine callee save regsiters.

[Matthias Braun]

MatzeB added a subscriber: dsanders.
MatzeB added a comment.

+CC Daniel (this time for real):

While doing this I hit some strange issues in MipsFrameLowering where the frame and base pointer declared to be saved and the one in the callee save list don't always match (32bit vs. 64bit version of the register). This worked by accident before because PhysRegUsed was tracking register units. I put in a register alias iterator to fix it in this patch, but I assume this mismatch was not intentional.


rL LLVM

http://reviews.llvm.org/D10909