diff --git a/llvm/utils/TableGen/X86DisassemblerTables.cpp b/llvm/utils/TableGen/X86DisassemblerTables.cpp
index 14de3682a515..ac867dcfa32e 100644
--- a/llvm/utils/TableGen/X86DisassemblerTables.cpp
+++ b/llvm/utils/TableGen/X86DisassemblerTables.cpp
@@ -51,7 +51,6 @@ static inline bool inheritsFrom(InstructionContext child,
     return inheritsFrom(child, IC_64BIT_OPSIZE);
   case IC_XD:
     return inheritsFrom(child, IC_64BIT_XD);
-           inheritsFrom(child, IC_XD_OPSIZE);
   case IC_XS:
     return inheritsFrom(child, IC_64BIT_XS);
   case IC_XD_OPSIZE: