[clang] [clang][CodeGen] Promote point of GRO(CWG2563) (PR #151067)

[Chuanqi Xu via cfe-commits]

================
@@ -768,6 +779,41 @@ struct GetReturnObjectManager {
     CGF.EmitAutoVarInit(GroEmission);
     Builder.CreateStore(Builder.getTrue(), GroActiveFlag);
   }
+
+  void EmitGroConv() {
+    // GRO conversion is unnecessary when get_return_object's type matches the
+    // coroutine return type.
+    if (DirectEmit)
+      return;
----------------
ChuanqiXu9 wrote:

nit: it reads better to move the condition to the caller of the function.

https://github.com/llvm/llvm-project/pull/151067