[llvm] [Coroutines] fix coroutines + std::unique_ptr with async exceptions validation errors (PR #149691)

[via llvm-commits]

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@@ -2229,6 +2325,8 @@ PreservedAnalyses CoroSplitPass::run(LazyCallGraph::SCC &C,
     if (!Shape.CoroBegin)
       continue;
 
+    enforceDominationByCoroBegin(F, Shape);
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tzuralon wrote:

No problem, on it.

https://github.com/llvm/llvm-project/pull/149691