[PATCH] D69868: Allow "callbr" to return non-void values

[Quentin Colombet via Phabricator via llvm-commits]

qcolombet added a comment.

> I've been concerned about the register live-ins too (I'm less concerned about the successors issue). Is there documentation on the original decision to disallow physical register live-ins for MBBs before register allocation? We could then check to see if we're violating the original reasoning.

IIRC the regallocators don't rely on this. Actually, I think the live-ins sets are supposed to be correct only after regalloc (expect for the entry block, I don’t know for the landing pads.)


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https://reviews.llvm.org/D69868