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...!) I am trying to fix an assert that occurs when the transforms in llvm/lib/Transforms/Coroutines are applied to LLVM IR that has been generated with UBSan enabled -- specifically, '-fsanitize=null'. You can see an example of the assert in this 26-line C++ file here: https://godbolt.org/g/Gw9UZq Note that without the '-fsanitize=null' option this compiles fine, but when that option is used, Clang/LLVM crashes due to "error in backend: cannot move instruction since its users are not dominated by CoroBegin". The coroutine pass coro-split is responsible for transforming in...

...rying to fix an assert that occurs when the transforms in llvm/lib/Transforms/Coroutines are applied to LLVM IR that has been generated with UBSan enabled -- specifically, '-fsanitize=null'. > > You can see an example of the assert in this 26-line C++ file here: https://godbolt.org/g/Gw9UZq <https://godbolt.org/g/Gw9UZq> > > Note that without the '-fsanitize=null' option this compiles fine, but when that option is used, Clang/LLVM crashes due to "error in backend: cannot move instruction since its users are not dominated by CoroBegin". > > The cor...