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

[Chuanqi Xu via cfe-commits]

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@@ -1553,6 +1625,9 @@ static bool hasCallsInBlocksBetween(BasicBlock *SaveBB, BasicBlock *ResDesBB) {
 }
 
 static bool hasCallsBetween(Instruction *Save, Instruction *ResumeOrDestroy) {
+  if (Save == ResumeOrDestroy)
+    return false;
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ChuanqiXu9 wrote:

How can this be true?

Oh, I see you use it in `isSimpleHelper`.

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