Implement protected visibility. This partly implements PR1363. Linker
should be taught to deal with protected symbols.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36565 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/AsmParser/llvmAsmParser.y b/lib/AsmParser/llvmAsmParser.y
index c47b6fc..63f2261 100644
--- a/lib/AsmParser/llvmAsmParser.y
+++ b/lib/AsmParser/llvmAsmParser.y
@@ -1099,7 +1099,7 @@
 %token NORETURN INREG SRET NOUNWIND
 
 // Visibility Styles
-%token DEFAULT HIDDEN
+%token DEFAULT HIDDEN PROTECTED
 
 %start Module
 %%
@@ -1180,9 +1180,10 @@
   ;
 
 GVVisibilityStyle
-  : /*empty*/ { $$ = GlobalValue::DefaultVisibility; }
-  | DEFAULT   { $$ = GlobalValue::DefaultVisibility; }
-  | HIDDEN    { $$ = GlobalValue::HiddenVisibility;  }
+  : /*empty*/ { $$ = GlobalValue::DefaultVisibility;   }
+  | DEFAULT   { $$ = GlobalValue::DefaultVisibility;   }
+  | HIDDEN    { $$ = GlobalValue::HiddenVisibility;    }
+  | PROTECTED { $$ = GlobalValue::ProtectedVisibility; }
   ;
 
 FunctionDeclareLinkage