Index: cfe/trunk/lib/AST/StmtProfile.cpp
===================================================================
--- cfe/trunk/lib/AST/StmtProfile.cpp
+++ cfe/trunk/lib/AST/StmtProfile.cpp
@@ -1277,7 +1277,6 @@
   case OO_Arrow:
   case OO_Call:
   case OO_Conditional:
-  case OO_Coawait:
   case NUM_OVERLOADED_OPERATORS:
     llvm_unreachable("Invalid operator call kind");
 
@@ -1449,6 +1448,10 @@
 
   case OO_Subscript:
     return Stmt::ArraySubscriptExprClass;
+
+  case OO_Coawait:
+    UnaryOp = UO_Coawait;
+    return Stmt::UnaryOperatorClass;
   }
 
   llvm_unreachable("Invalid overloaded operator expression");
Index: cfe/trunk/test/PCH/coroutines.cpp
===================================================================
--- cfe/trunk/test/PCH/coroutines.cpp
+++ cfe/trunk/test/PCH/coroutines.cpp
@@ -66,6 +66,14 @@
   co_return x;   // checks coreturn_stmt with expr
 }
 
+struct S {};
+S operator co_await(S) { return S(); }
+
+template <typename T>
+int f3(T x) {
+  co_await x; // checks dependent_coawait with overloaded co_await operator
+}
+
 #else
 
 // expected-no-diagnostics