[clang] [llvm] [coroutine] Implement llvm.coro.await.suspend intrinsic (PR #79712)

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@@ -79,6 +79,73 @@ using namespace llvm;
 
 namespace {
 
+// Created on demand if the coro-early pass has work to do.
+class Lowerer : public coro::LowererBase {
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fpasserby wrote:

Yes, it is possible. Switched to a simple function.

https://github.com/llvm/llvm-project/pull/79712