Mangle block pointer types. Fixes PR5858.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@92069 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/Mangle.cpp b/lib/CodeGen/Mangle.cpp
index 367c868..f4c6ffe 100644
--- a/lib/CodeGen/Mangle.cpp
+++ b/lib/CodeGen/Mangle.cpp
@@ -990,7 +990,8 @@
 }
 
 void CXXNameMangler::mangleType(const BlockPointerType *T) {
-  assert(false && "can't mangle block pointer types yet");
+  Out << "U13block_pointer";
+  mangleType(T->getPointeeType());
 }
 
 void CXXNameMangler::mangleType(const FixedWidthIntType *T) {