diff --git a/lib/Target/X86/X86ATTAsmPrinter.cpp b/lib/Target/X86/X86ATTAsmPrinter.cpp
index 44040977fed..5575ee7795a 100644
--- a/lib/Target/X86/X86ATTAsmPrinter.cpp
+++ b/lib/Target/X86/X86ATTAsmPrinter.cpp
@@ -643,15 +643,6 @@ void X86ATTAsmPrinter::printMachineInstruction(const MachineInstr *MI) {
   case X86::PsMOVZX64rr32:
     O << TAI->getCommentString() << " ZERO-EXTEND " << "\n\t";
     break;
-  case X86::MOV8mr: {
-    const MachineOperand &MO = MI->getOperand(4);
-    switch (MO.getReg()) {
-      default: abort();
-      case X86::AH: case X86::DH: case X86::CH: case X86::BH:
-      case X86::AL: case X86::DL: case X86::CL: case X86::BL:
-        break;
-    }
-  }
   }
 
   // Call the autogenerated instruction printer routines.