[llvm-branch-commits] [llvm] [LivePhysRegs] Add callee-saved regs from MFI in addLiveOutsNoPristines. (PR #73553)

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qcolombet wrote:

I haven't looked closely to the patch, but I share @MatzeB's concerns here.

Essentially this patch is reverting https://reviews.llvm.org/D36160, which was fixing a modeling issue with LR on ARM to begin with!

https://github.com/llvm/llvm-project/pull/73553