Implement name mangling for template template parameters

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@95427 91177308-0d34-0410-b5e6-96231b3b80d8

2 files changed, 22 insertions, 2 deletions

diff --git a/lib/CodeGen/Mangle.cpp b/lib/CodeGen/Mangle.cpp
index cb304960ce..3f541ae87a 100644
--- a/lib/CodeGen/Mangle.cpp
+++ b/lib/CodeGen/Mangle.cpp
@@ -400,6 +400,13 @@ void CXXNameMangler::mangleUnscopedTemplateName(const TemplateDecl *ND) {
   if (mangleSubstitution(ND))
     return;
 
+  // <template-template-param> ::= <template-param>
+  if (const TemplateTemplateParmDecl *TTP
+                                     = dyn_cast<TemplateTemplateParmDecl>(ND)) {
+    mangleTemplateParameter(TTP->getIndex());
+    return;
+  } 
+
   mangleUnscopedName(ND->getTemplatedDecl());
   addSubstitution(ND);
 }
@@ -674,15 +681,21 @@ void CXXNameMangler::mangleTemplatePrefix(const TemplateDecl *ND) {
   // <template-prefix> ::= <prefix> <template unqualified-name>
   //                   ::= <template-param>
   //                   ::= <substitution>
+  // <template-template-param> ::= <template-param>
+  //                               <substitution>
 
   if (mangleSubstitution(ND))
     return;
 
-  // FIXME: <template-param>
+  // <template-template-param> ::= <template-param>
+  if (const TemplateTemplateParmDecl *TTP
+                                     = dyn_cast<TemplateTemplateParmDecl>(ND)) {
+    mangleTemplateParameter(TTP->getIndex());
+    return;
+  } 
 
   manglePrefix(ND->getDeclContext());
   mangleUnqualifiedName(ND->getTemplatedDecl());
-
   addSubstitution(ND);
 }
 
diff --git a/test/CodeGenCXX/mangle.cpp b/test/CodeGenCXX/mangle.cpp
index a1dc67bee4..8f45175ae8 100644
--- a/test/CodeGenCXX/mangle.cpp
+++ b/test/CodeGenCXX/mangle.cpp
@@ -365,3 +365,10 @@ namespace test0 {
   }
   // CHECK: define linkonce_odr void @_ZN5test01jINS_1AEEEvRAszmecvT__E6buffer_c(
 }
+
+namespace test1 {
+  template<typename T> struct X { };
+  template<template<class> class Y, typename T> void f(Y<T>) { }
+  // CHECK: define void @_ZN5test11fINS_1XEiEEvT_IT0_E
+  template void f(X<int>);
+}