Improved handling of the visibility attribute. Declarations now inherit their parent's visibility.

(This is kind of a risky change, but I did a self-host build and everything appears to work fine!)

llvm-svn: 95511

2 files changed, 70 insertions, 0 deletions

diff --git a/clang/lib/CodeGen/CodeGenModule.cpp b/clang/lib/CodeGen/CodeGenModule.cpp
index 644c5d0bf8c..c5d84d74db8 100644
--- a/clang/lib/CodeGen/CodeGenModule.cpp
+++ b/clang/lib/CodeGen/CodeGenModule.cpp
@@ -132,6 +132,10 @@ CodeGenModule::getDeclVisibilityMode(const Decl *D) const {
     }
   }
 
+  // This decl should have the same visibility as its parent.
+  if (const DeclContext *DC = D->getDeclContext()) 
+    return getDeclVisibilityMode(cast<Decl>(DC));
+
   return getLangOptions().getVisibilityMode();
 }
 
diff --git a/clang/test/CodeGenCXX/visibility.cpp b/clang/test/CodeGenCXX/visibility.cpp
new file mode 100644
index 00000000000..5edd27b8b27
--- /dev/null
+++ b/clang/test/CodeGenCXX/visibility.cpp
@@ -0,0 +1,66 @@
+// RUN: %clang_cc1 %s -triple=x86_64-apple-darwin10 -emit-llvm -o - | FileCheck %s
+
+#define HIDDEN __attribute__((visibility("hidden")))
+#define PROTECTED __attribute__((visibility("protected")))
+#define DEFAULT __attribute__((visibility("default")))
+
+// CHECK: @_ZN5Test425VariableInHiddenNamespaceE = hidden global i32 10
+
+namespace Test1 {
+  // CHECK: define hidden void @_ZN5Test11fEv
+  void HIDDEN f() { }
+  
+}
+
+namespace Test2 {
+  struct HIDDEN A {
+    void f();
+  };
+
+  // A::f is a member function of a hidden class.
+  // CHECK: define hidden void @_ZN5Test21A1fEv
+  void A::f() { }
+}
+ 
+namespace Test3 {
+  struct HIDDEN A {
+    struct B {
+      void f();
+    };
+  };
+
+  // B is a nested class where its parent class is hidden.
+  // CHECK: define hidden void @_ZN5Test31A1B1fEv
+  void A::B::f() { }  
+}
+
+namespace Test4 HIDDEN {
+  int VariableInHiddenNamespace = 10;
+
+  // Test4::g is in a hidden namespace.
+  // CHECK: define hidden void @_ZN5Test41gEv
+  void g() { } 
+  
+  struct DEFAULT A {
+    void f();
+  };
+  
+  // A has default visibility.
+  // CHECK: define void @_ZN5Test41A1fEv
+  void A::f() { } 
+}
+
+namespace Test5 {
+
+  namespace NS HIDDEN {
+    // f is in NS which is hidden.
+    // CHECK: define hidden void @_ZN5Test52NS1fEv()
+    void f() { }
+  }
+  
+  namespace NS {
+    // g is in NS, but this NS decl is not hidden.
+    // CHECK: define void @_ZN5Test52NS1gEv
+    void g() { }
+  }
+}