DebugInfo: Handle emitting constants of C++ unicode character type.

Patch by Stephan Tolksdorf! (with some test case stuff by me)

Differential Revision: http://reviews.llvm.org/D3810

llvm-svn: 209037
diff --git a/llvm/lib/CodeGen/AsmPrinter/DwarfUnit.cpp b/llvm/lib/CodeGen/AsmPrinter/DwarfUnit.cpp
index b50478b..8adf78c 100644
--- a/llvm/lib/CodeGen/AsmPrinter/DwarfUnit.cpp
+++ b/llvm/lib/CodeGen/AsmPrinter/DwarfUnit.cpp
@@ -764,10 +764,11 @@
           Encoding == dwarf::DW_ATE_unsigned_char ||
           Encoding == dwarf::DW_ATE_signed ||
           Encoding == dwarf::DW_ATE_signed_char ||
-          Encoding == dwarf::DW_ATE_boolean) && "Unsupported encoding");
+          Encoding == dwarf::DW_ATE_UTF || Encoding == dwarf::DW_ATE_boolean) &&
+         "Unsupported encoding");
   return (Encoding == dwarf::DW_ATE_unsigned ||
           Encoding == dwarf::DW_ATE_unsigned_char ||
-          Encoding == dwarf::DW_ATE_boolean);
+          Encoding == dwarf::DW_ATE_UTF || Encoding == dwarf::DW_ATE_boolean);
 }
 
 /// If this type is derived from a base type then return base type size.