From 35cebc3eea898637057b10b5cf7dd08b1d788980 Mon Sep 17 00:00:00 2001
From: John McCall <rjmccall@apple.com>
Date: Tue, 2 Nov 2010 18:38:13 +0000
Subject: [PATCH] Unbreak private_extern, which apparently we had zero tests
 for.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@118034 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/AST/Decl.cpp          |  8 ++++++--
 test/CodeGen/visibility.c | 14 ++++++++++++++
 2 files changed, 20 insertions(+), 2 deletions(-)

diff --git a/lib/AST/Decl.cpp b/lib/AST/Decl.cpp
index 2eef54cf14..ca963ad7e5 100644
--- a/lib/AST/Decl.cpp
+++ b/lib/AST/Decl.cpp
@@ -278,11 +278,12 @@ static LinkageInfo getLVForNamespaceScopeDecl(const NamedDecl *D, LVFlags F) {
         LV.mergeVisibility(TypeLV.second);
     }
 
+    if (Var->getStorageClass() == SC_PrivateExtern)
+      LV.setVisibility(HiddenVisibility, true);
+
     if (!Context.getLangOptions().CPlusPlus &&
         (Var->getStorageClass() == SC_Extern ||
          Var->getStorageClass() == SC_PrivateExtern)) {
-      if (Var->getStorageClass() == SC_PrivateExtern)
-        LV.setVisibility(HiddenVisibility, true);
 
       // C99 6.2.2p4:
       //   For an identifier declared with the storage-class specifier
@@ -307,6 +308,9 @@ static LinkageInfo getLVForNamespaceScopeDecl(const NamedDecl *D, LVFlags F) {
     // for justification).  In practice, GCC doesn't do this, so it's
     // just too painful to make work.
 
+    if (Function->getStorageClass() == SC_PrivateExtern)
+      LV.setVisibility(HiddenVisibility, true);
+
     // C99 6.2.2p5:
     //   If the declaration of an identifier for a function has no
     //   storage-class specifier, its linkage is determined exactly
diff --git a/test/CodeGen/visibility.c b/test/CodeGen/visibility.c
index 42b116f7aa..fa4b599309 100644
--- a/test/CodeGen/visibility.c
+++ b/test/CodeGen/visibility.c
@@ -19,6 +19,10 @@ int g_def = 0;
 extern int g_ext;
 static char g_deferred[] = "hello";
 
+// CHECK-DEFAULT: @test4 = hidden global i32 10
+// CHECK-PROTECTED: @test4 = hidden global i32 10
+// CHECK-HIDDEN: @test4 = hidden global i32 10
+
 // CHECK-DEFAULT: define i32 @f_def()
 // CHECK-DEFAULT: declare void @f_ext()
 // CHECK-DEFAULT: define internal void @f_deferred()
@@ -53,3 +57,13 @@ void  __attribute__((visibility("default"))) test1(struct Test1 *v) { }
 // CHECK-HIDDEN: define void @test2()
 void test2(void);
 void __attribute__((visibility("default"))) test2(void) {}
+
+// CHECK-DEFAULT: define hidden void @test3()
+// CHECK-PROTECTED: define hidden void @test3()
+// CHECK-HIDDEN: define hidden void @test3()
+extern void test3(void);
+__private_extern__ void test3(void) {}
+
+// Top of file.
+extern int test4;
+__private_extern__ int test4 = 10;
-- 
2.40.0