[AST] Incorrectly qualified unscoped enumeration as template actual parameter.

An unscoped enumeration used as template argument, should not have any
qualified information about its enclosing scope, as its visibility is
global.

In the case of scoped enumerations, they must include information
about their enclosing scope.

Patch by Carlos Alberto Enciso!

Differential Revision: https://reviews.llvm.org/D39239

llvm-svn: 321312
diff --git a/clang/lib/AST/Decl.cpp b/clang/lib/AST/Decl.cpp
index 2f51ec3..ee15a4d 100644
--- a/clang/lib/AST/Decl.cpp
+++ b/clang/lib/AST/Decl.cpp
@@ -1548,7 +1548,10 @@
       // enumerator is declared in the scope that immediately contains
       // the enum-specifier. Each scoped enumerator is declared in the
       // scope of the enumeration.
-      if (ED->isScoped() || ED->getIdentifier())
+      // For the case of unscoped enumerator, do not include in the qualified
+      // name any information about its enum enclosing scope, as is visibility
+      // is global.
+      if (ED->isScoped())
         OS << *ED;
       else
         continue;
diff --git a/clang/test/Modules/odr.cpp b/clang/test/Modules/odr.cpp
index 9cdbb4f..c470011 100644
--- a/clang/test/Modules/odr.cpp
+++ b/clang/test/Modules/odr.cpp
@@ -18,6 +18,6 @@
 // expected-note@a.h:3 {{declaration of 'f' does not match}}
 // expected-note@a.h:1 {{definition has no member 'm'}}
 
-// expected-error@b.h:5 {{'E::e2' from module 'b' is not present in definition of 'E' in module 'a'}}
+// expected-error@b.h:5 {{'e2' from module 'b' is not present in definition of 'E' in module 'a'}}
 // expected-error@b.h:3 {{'Y::f' from module 'b' is not present in definition of 'Y' in module 'a'}}
 // expected-error@b.h:2 {{'Y::m' from module 'b' is not present in definition of 'Y' in module 'a'}}
diff --git a/clang/test/SemaCXX/return-noreturn.cpp b/clang/test/SemaCXX/return-noreturn.cpp
index cdd96e6..cfeddff 100644
--- a/clang/test/SemaCXX/return-noreturn.cpp
+++ b/clang/test/SemaCXX/return-noreturn.cpp
@@ -143,7 +143,7 @@
 } // expected-warning {{control reaches end of non-void function}}
 
 void PR9412_f() {
-    PR9412_t<PR9412_Exact>(); // expected-note {{in instantiation of function template specialization 'PR9412_t<PR9412_MatchType::PR9412_Exact>' requested here}}
+    PR9412_t<PR9412_Exact>(); // expected-note {{in instantiation of function template specialization 'PR9412_t<PR9412_Exact>' requested here}}
 }
 
 struct NoReturn {
diff --git a/clang/test/SemaTemplate/temp_arg_enum_printing.cpp b/clang/test/SemaTemplate/temp_arg_enum_printing.cpp
index bdf277d..dbb4db8 100644
--- a/clang/test/SemaTemplate/temp_arg_enum_printing.cpp
+++ b/clang/test/SemaTemplate/temp_arg_enum_printing.cpp
@@ -13,9 +13,9 @@
 void foo();
   
 void test() {
-  // CHECK: template<> void foo<NamedEnumNS::NamedEnum::Val0>()
+  // CHECK: template<> void foo<NamedEnumNS::Val0>()
   NamedEnumNS::foo<Val0>();
-  // CHECK: template<> void foo<NamedEnumNS::NamedEnum::Val1>()
+  // CHECK: template<> void foo<NamedEnumNS::Val1>()
   NamedEnumNS::foo<(NamedEnum)1>();
   // CHECK: template<> void foo<2>()
   NamedEnumNS::foo<(NamedEnum)2>();
diff --git a/clang/test/SemaTemplate/temp_arg_enum_printing_more.cpp b/clang/test/SemaTemplate/temp_arg_enum_printing_more.cpp
new file mode 100644
index 0000000..a3a7158
--- /dev/null
+++ b/clang/test/SemaTemplate/temp_arg_enum_printing_more.cpp
@@ -0,0 +1,26 @@
+// RUN: %clang_cc1 -fsyntax-only -ast-print %s -std=c++11 | FileCheck %s
+
+// Make sure that for template value arguments that are unscoped enumerators,
+// no qualified enum information is included in their name, as their visibility
+// is global. In the case of scoped enumerators, they must include information
+// about their enum enclosing scope.
+
+enum E1 { e1 };
+template<E1 v> struct tmpl_1 {};
+// CHECK: template<> struct tmpl_1<e1>
+tmpl_1<E1::e1> TMPL_1;                      // Name must be 'e1'.
+
+namespace nsp_1 { enum E2 { e2 }; }
+template<nsp_1::E2 v> struct tmpl_2 {};
+// CHECK: template<> struct tmpl_2<nsp_1::e2>
+tmpl_2<nsp_1::E2::e2> TMPL_2;               // Name must be 'nsp_1::e2'.
+
+enum class E3 { e3 };
+template<E3 v> struct tmpl_3 {};
+// CHECK: template<> struct tmpl_3<E3::e3>
+tmpl_3<E3::e3> TMPL_3;                      // Name must be 'E3::e3'.
+
+namespace nsp_2 { enum class E4 { e4 }; }
+template<nsp_2::E4 v> struct tmpl_4 {};
+// CHECK: template<> struct tmpl_4<nsp_2::E4::e4>
+tmpl_4<nsp_2::E4::e4> TMPL_4;               // Name must be 'nsp_2::E4::e4'.
diff --git a/clang/unittests/AST/NamedDeclPrinterTest.cpp b/clang/unittests/AST/NamedDeclPrinterTest.cpp
index 92df457..002bb28 100644
--- a/clang/unittests/AST/NamedDeclPrinterTest.cpp
+++ b/clang/unittests/AST/NamedDeclPrinterTest.cpp
@@ -143,7 +143,7 @@
   ASSERT_TRUE(PrintedWrittenNamedDeclCXX11Matches(
     "enum X { A };",
     "A",
-    "X::A"));
+    "A"));
 }
 
 TEST(NamedDeclPrinter, TestScopedNamedEnum) {
@@ -164,7 +164,7 @@
   ASSERT_TRUE(PrintedWrittenNamedDeclCXX11Matches(
     "class X { enum Y { A }; };",
     "A",
-    "X::Y::A"));
+    "X::A"));
 }
 
 TEST(NamedDeclPrinter, TestClassWithScopedNamedEnum) {