Track IntrusiveRefCntPtr::get() changes from LLVM r212366

llvm-svn: 212369
diff --git a/clang/lib/Frontend/CompilerInvocation.cpp b/clang/lib/Frontend/CompilerInvocation.cpp
index a5cdb8c..d04d829 100644
--- a/clang/lib/Frontend/CompilerInvocation.cpp
+++ b/clang/lib/Frontend/CompilerInvocation.cpp
@@ -2039,7 +2039,7 @@
 
     IntrusiveRefCntPtr<vfs::FileSystem> FS =
         vfs::getVFSFromYAML(Buffer.release(), /*DiagHandler*/nullptr);
-    if (!FS.getPtr()) {
+    if (!FS.get()) {
       Diags.Report(diag::err_invalid_vfs_overlay) << File;
       return IntrusiveRefCntPtr<vfs::FileSystem>();
     }