Implement DTPOFF.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@117546 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/MC/MCExpr.cpp b/lib/MC/MCExpr.cpp
index 6ee2520..5780ba9 100644
--- a/lib/MC/MCExpr.cpp
+++ b/lib/MC/MCExpr.cpp
@@ -180,6 +180,7 @@
   case VK_TLSGD: return "TLSGD";
   case VK_TLSLDM: return "TLSLDM";
   case VK_TPOFF: return "TPOFF";
+  case VK_DTPOFF: return "DTPOFF";
   case VK_ARM_HI16: return ":upper16:";
   case VK_ARM_LO16: return ":lower16:";
   case VK_ARM_PLT: return "(PLT)";
@@ -201,6 +202,7 @@
     .Case("TLSGD", VK_TLSGD)
     .Case("TLSLDM", VK_TLSLDM)
     .Case("TPOFF", VK_TPOFF)
+    .Case("DTPOFF", VK_DTPOFF)
     .Case("TLVP", VK_TLVP)
     .Default(VK_Invalid);
 }