Mangle dependent name expressions. Fixes PR5063.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@82915 91177308-0d34-0410-b5e6-96231b3b80d8

lib/CodeGen/Mangle.cpp

@@ -20,6 +20,7 @@
 #include "clang/AST/DeclCXX.h"
 #include "clang/AST/DeclObjC.h"
 #include "clang/AST/DeclTemplate.h"
+#include "clang/AST/ExprCXX.h"
 #include "clang/Basic/SourceManager.h"
 #include "llvm/Support/Compiler.h"
 #include "llvm/Support/raw_ostream.h"
@@ -971,7 +972,26 @@ void CXXNameMangler::mangleExpression(const Expr *E) {
     }
 
     }
+    
+    break;
   }
+  
+  case Expr::UnresolvedDeclRefExprClass: {
+    const UnresolvedDeclRefExpr *DRE = cast<UnresolvedDeclRefExpr>(E);
+    const Type *QTy = DRE->getQualifier()->getAsType();
+    assert(QTy && "Qualifier was not type!");
+
+    // ::= sr <type> <unqualified-name>                   # dependent name
+    Out << "sr";
+    mangleType(QualType(QTy, 0));
+    
+    assert(DRE->getDeclName().getNameKind() == DeclarationName::Identifier &&
+           "Unhandled decl name kind!");
+    mangleSourceName(DRE->getDeclName().getAsIdentifierInfo());
+    
+    break;
+  }
+
   }
 }
 

test/CodeGenCXX/mangle.cpp

@@ -180,3 +180,21 @@ template <typename T> typename T::U ft6(const T&) { return 0; }
 
 // CHECK: @_Z3ft6I1SENT_1UERKS1_
 template int ft6<S>(const S&);
+
+template<typename> struct __is_scalar {
+  enum { __value = 1 };
+};
+
+template<bool, typename> struct __enable_if { };
+
+template<typename T> struct __enable_if<true, T> {
+  typedef T __type;
+};
+
+// PR5063
+template<typename T> typename __enable_if<__is_scalar<T>::__value, void>::__type ft7() { }
+
+// CHECK: @_Z3ft7IiEN11__enable_ifIXsr11__is_scalarIT_E7__valueEvE6__typeEv
+template void ft7<int>();
+// CHECK: @_Z3ft7IPvEN11__enable_ifIXsr11__is_scalarIT_E7__valueEvE6__typeEv
+template void ft7<void*>();