[llvm-dev] [RFC] New pass: LoopExitValues

[Steve King via llvm-dev]

Hi Folks, Let's keep this optimization alive.  To summarize: several
folks voiced general support, but with questions about why existing
optimizations do not already catch this case.  Deep dive by Wei Mi
showed that the optimization is most likely not a clean-up of LSR
sloppiness, but something new.  Follow-up by myself confirmed that the
redundancy eliminated the LoopExitValues pass exists in the original
IR from Clang.

As a next step, can we come to consensus on where the LoopExitValues
optimization belongs?

Regards,
-steve