Per an offline conversation with John McCall, have StmtPrinter actually print out the source expression for OpaqueValueExpr.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@145524 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/AST/StmtPrinter.cpp b/lib/AST/StmtPrinter.cpp
index 807d358..220e50a0 100644
--- a/lib/AST/StmtPrinter.cpp
+++ b/lib/AST/StmtPrinter.cpp
@@ -1616,7 +1616,9 @@
   OS << *Node->getDecl();
 }
 
-void StmtPrinter::VisitOpaqueValueExpr(OpaqueValueExpr *Node) {}
+void StmtPrinter::VisitOpaqueValueExpr(OpaqueValueExpr *Node) { 
+  PrintExpr(Node->getSourceExpr());
+}
 
 void StmtPrinter::VisitAsTypeExpr(AsTypeExpr *Node) {
   OS << "__builtin_astype(";