Calling setVisibility directly only makes (some) sense when the visibility is
explicit.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@154969 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/include/clang/AST/Decl.h b/include/clang/AST/Decl.h
index 708d6c6..ac7ab0f 100644
--- a/include/clang/AST/Decl.h
+++ b/include/clang/AST/Decl.h
@@ -245,7 +245,6 @@
     bool visibilityExplicit() const { return explicit_; }
 
     void setLinkage(Linkage L) { linkage_ = L; }
-    void setVisibility(Visibility V) { visibility_ = V; }
     void setVisibility(Visibility V, bool E) { visibility_ = V; explicit_ = E; }
 
     void mergeLinkage(Linkage L) {
diff --git a/lib/AST/Decl.cpp b/lib/AST/Decl.cpp
index 07098fd..53032bc 100644
--- a/lib/AST/Decl.cpp
+++ b/lib/AST/Decl.cpp
@@ -785,7 +785,7 @@
       LinkageInfo LV;
       if (Flags.ConsiderVisibilityAttributes) {
         if (llvm::Optional<Visibility> Vis = Function->getExplicitVisibility())
-          LV.setVisibility(*Vis);
+          LV.setVisibility(*Vis, true);
       }
       
       if (const FunctionDecl *Prev = Function->getPreviousDecl()) {
@@ -806,10 +806,10 @@
 
         LinkageInfo LV;
         if (Var->getStorageClass() == SC_PrivateExtern)
-          LV.setVisibility(HiddenVisibility);
+          LV.setVisibility(HiddenVisibility, true);
         else if (Flags.ConsiderVisibilityAttributes) {
           if (llvm::Optional<Visibility> Vis = Var->getExplicitVisibility())
-            LV.setVisibility(*Vis);
+            LV.setVisibility(*Vis, true);
         }
         
         if (const VarDecl *Prev = Var->getPreviousDecl()) {