rnk added inline comments.
================
Comment at: test/CodeGenCoroutines/coro-await-domination.cpp:33
+ int x = 42;
+ x = co_await A{};
+}
----------------
It looks like this is the expression in question. This expression should have
aggregate evaluation kind, not scalar. We don't need to reload aggregate
expression evaluation results because they are represented with temporary
allocas, and they don't have dominance problems. It seems like there is an
incorrect call to PopCleanupBlocks somewhere, and that's where the real fix
should be.
https://reviews.llvm.org/D33733
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