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Summary: This is the 4c patch of the coroutine series. CoroElide pass now checks if PostSplit coro.begin is referenced by coro.subfn.addr intrinsics. If so replace coro.subfn.addrs with an appropriate coroutine subfunction associated with that coro.begin. Documentation and overview is here: http://llvm.org/docs/Coroutines.html. Upstreaming sequence (rough plan) 1.Add documentation. (https://reviews.llvm.org/D22603) 2.Add coroutine intrinsics. (https://reviews.llvm.org/D22659) 3.Add empty coroutine passes. (https://reviews.llvm.org/D22847) 4.Add coroutine devirtualization + tests. ab) Lower coro.resume and coro.destroy (https://reviews.llvm.org/D22998) c) Do devirtualization <= we are here 5.Add CGSCC restart trigger + tests. 6.Add coroutine heap elision + tests. 7.Add the rest of the logic (split into more patches) Reviewers: majnemer Subscribers: mehdi_amini, llvm-commits Differential Revision: https://reviews.llvm.org/D23229 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@277908 91177308-0d34-0410-b5e6-96231b3b80d8
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