[OPENMP] Codegen for 'in_reduction' clause.

Added codegen for task-based directive with in_reduction clause.
```
<body>
```
The next code is emitted:
```
void *td;
...
td = call i8* @__kmpc_task_reduction_init();
...
<type> *priv = (<type> *)call i8* @__kmpc_task_reduction_get_th_data(i32
GTID, i8* td, i8* <orig>)
```

llvm-svn: 309270
diff --git a/clang/lib/AST/StmtProfile.cpp b/clang/lib/AST/StmtProfile.cpp
index 1b6c83f..c1ba1e8 100644
--- a/clang/lib/AST/StmtProfile.cpp
+++ b/clang/lib/AST/StmtProfile.cpp
@@ -596,6 +596,10 @@
     if (E)
       Profiler->VisitStmt(E);
   }
+  for (auto *E : C->taskgroup_descriptors()) {
+    if (E)
+      Profiler->VisitStmt(E);
+  }
 }
 void OMPClauseProfiler::VisitOMPLinearClause(const OMPLinearClause *C) {
   VisitOMPClauseList(C);