[llvm-dev] Useless exit instruction in "main", replaceable with return inst

[Dávid Bolvanský via llvm-dev]

Hi,

LLVM optimizer seems to leave "call exit" instruction in "main" function
but it could be replaced by a return instruction.
Any reason why leave it as is or this simple optimization could be
implemented e.g. in SimplifyLibCalls?

Thanks
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