NFC: Simplify dumpStmt child handling

Reviewers: aaron.ballman

Subscribers: cfe-commits

Differential Revision: https://reviews.llvm.org/D55068

llvm-svn: 348189
diff --git a/clang/lib/AST/ASTDumper.cpp b/clang/lib/AST/ASTDumper.cpp
index fb78047..8007282 100644
--- a/clang/lib/AST/ASTDumper.cpp
+++ b/clang/lib/AST/ASTDumper.cpp
@@ -1989,18 +1989,13 @@
       return;
     }
 
-    // Some statements have custom mechanisms for dumping their children.
-    if (const DeclStmt *DS = dyn_cast<DeclStmt>(S)) {
-      VisitDeclStmt(DS);
-      return;
-    }
-    if (const GenericSelectionExpr *GSE = dyn_cast<GenericSelectionExpr>(S)) {
-      VisitGenericSelectionExpr(GSE);
-      return;
-    }
-
     ConstStmtVisitor<ASTDumper>::Visit(S);
 
+    // Some statements have custom mechanisms for dumping their children.
+    if (isa<DeclStmt>(S) || isa<GenericSelectionExpr>(S)) {
+      return;
+    }
+
     for (const Stmt *SubStmt : S->children())
       dumpStmt(SubStmt);
   });