2 files changed, 62 insertions, 0 deletions
diff --git a/lib/CodeGen/Mangle.cpp b/lib/CodeGen/Mangle.cpp
index b6bebd0247..93b9a8fbc7 100644
--- a/lib/CodeGen/Mangle.cpp
+++ b/lib/CodeGen/Mangle.cpp
@@ -1098,6 +1098,24 @@ void CXXNameMangler::mangleExpression(const Expr *E) {
     break;
   }
 
+  case Expr::ImplicitCastExprClass: {
+    mangleExpression(cast<ImplicitCastExpr>(E)->getSubExpr());
+    break;
+  }
+
+  case Expr::CStyleCastExprClass:
+  case Expr::CXXStaticCastExprClass:
+  case Expr::CXXDynamicCastExprClass:
+  case Expr::CXXReinterpretCastExprClass:
+  case Expr::CXXConstCastExprClass:
+  case Expr::CXXFunctionalCastExprClass: {
+    const ExplicitCastExpr *ECE = cast<ExplicitCastExpr>(E);
+    Out << "cv";
+    mangleType(ECE->getType());
+    mangleExpression(ECE->getSubExpr());
+    break;
+  }
+    
   case Expr::CXXOperatorCallExprClass: {
     const CXXOperatorCallExpr *CE = cast<CXXOperatorCallExpr>(E);
     unsigned NumArgs = CE->getNumArgs();
diff --git a/test/CodeGenCXX/mangle-exprs.cpp b/test/CodeGenCXX/mangle-exprs.cpp
new file mode 100644
index 0000000000..cdad39852c
--- /dev/null
+++ b/test/CodeGenCXX/mangle-exprs.cpp
@@ -0,0 +1,44 @@
+// RUN: %clang_cc1 -emit-llvm %s -o - -triple=x86_64-apple-darwin9 | FileCheck %s
+
+template < bool condition, typename T = void >
+struct enable_if { typedef T type; };
+
+template< typename T >
+struct enable_if< false, T > {};
+
+// PR5876
+namespace Casts {
+  template< unsigned O >
+  void implicit(typename enable_if< O <= 4 >::type* = 0) {
+  }
+  
+  template< unsigned O >
+  void cstyle(typename enable_if< O <= (unsigned)4 >::type* = 0) {
+  }
+
+  template< unsigned O >
+  void functional(typename enable_if< O <= unsigned(4) >::type* = 0) {
+  }
+  
+  template< unsigned O >
+  void static_(typename enable_if< O <= static_cast<unsigned>(4) >::type* = 0) {
+  }
+
+  // FIXME: Test const_cast, reinterpret_cast, dynamic_cast, which are
+  // a bit harder to use in template arguments.
+  template <unsigned N> struct T {};
+
+  template <int N> T<N> f() { return T<N>(); }
+  
+  // CHECK: define void @_ZN5Casts8implicitILj4EEEvPN9enable_ifIXleT_Li4EEvE4typeE
+  template void implicit<4>(void*);
+  // CHECK: define void @_ZN5Casts6cstyleILj4EEEvPN9enable_ifIXleT_cvjLi4EEvE4typeE
+  template void cstyle<4>(void*);
+  // CHECK: define void @_ZN5Casts10functionalILj4EEEvPN9enable_ifIXleT_cvjLi4EEvE4typeE
+  template void functional<4>(void*);
+  // CHECK: define void @_ZN5Casts7static_ILj4EEEvPN9enable_ifIXleT_cvjLi4EEvE4typeE
+  template void static_<4>(void*);
+
+  // CHECK: define i64 @_ZN5Casts1fILi6EEENS_1TIXT_EEEv
+  template T<6> f<6>();
+}