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Summary: If coroutine has no suspend points, remove heap allocation and turn a coroutine into a normal function. Also, if a pattern is detected that coroutine resumes or destroys itself prior to coro.suspend call, turn the suspend point into a simple jump to resume or cleanup label. This pattern occurs when coroutines are used to propagate errors in functions that return expected<T>. Reviewers: majnemer Subscribers: mehdi_amini, llvm-commits Differential Revision: https://reviews.llvm.org/D24408 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@282414 91177308-0d34-0410-b5e6-96231b3b80d8
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