Always deserialize from PCH file scoped variables with non trivial constructor/destructor.

Fixes http://llvm.org/PR7692

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@109501 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/PCH/cxx-required-decls.cpp b/test/PCH/cxx-required-decls.cpp
new file mode 100644
index 0000000..0e39ce3
--- /dev/null
+++ b/test/PCH/cxx-required-decls.cpp
@@ -0,0 +1,8 @@
+// Test this without pch.
+// RUN: %clang_cc1 -include %S/cxx-required-decls.h %s -emit-llvm -o - | FileCheck %s
+
+// Test with pch.
+// RUN: %clang_cc1 -x c++-header -emit-pch -o %t %S/cxx-required-decls.h
+// RUN: %clang_cc1 -include-pch %t %s -emit-llvm -o - | FileCheck %s
+
+// CHECK: @_ZL5globS = internal global %struct.S zeroinitializer