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

[Chuanqi Xu via cfe-commits]

================
@@ -232,16 +250,74 @@ static LValueOrRValue 
emitSuspendExpression(CodeGenFunction &CGF, CGCoroData &Co
   auto *NullPtr = llvm::ConstantPointerNull::get(CGF.CGM.Int8PtrTy);
   auto *SaveCall = Builder.CreateCall(CoroSave, {NullPtr});
 
+  const auto AwaitSuspendCanThrow =
+      AwaitSuspendStmtCanThrow(S.getSuspendExpr());
+
+  auto SuspendWrapper = CodeGenFunction(CGF.CGM).generateAwaitSuspendWrapper(
+      CGF.CurFn->getName(), Prefix, S);
+
+  llvm::CallBase *SuspendRet = nullptr;
----------------
ChuanqiXu9 wrote:

Let's sink the definitions to the uses.

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