llvm dev - Nov 2018 - Failures Coroutine Optimization

Hey guys, I've recently open source a coroutine based library
<https://github.com/loopperfect/conduit>.

We identified couple cases where clang/llvm is not able to optimize away
some heap allocations. I was wondering whether there is a way to fix this,
either by a workaround, compiler flags or fix in the llvm-optimisation pass.

Here is an link to the compiler explorer:
https://godbolt.org/z/kMEWEO

Feedback highly appreciated.

-- 
Regards,

Gaetano Checinski
Founder of Loopperfect
https://loopperfect.com
https://buckaroo.pm
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