diff --git a/lib/Target/Mips/Mips16ISelLowering.cpp b/lib/Target/Mips/Mips16ISelLowering.cpp
index 9102450dc53..81a05df1a70 100644
--- a/lib/Target/Mips/Mips16ISelLowering.cpp
+++ b/lib/Target/Mips/Mips16ISelLowering.cpp
@@ -120,13 +120,6 @@ static const Mips16IntrinsicHelperType Mips16IntrinsicHelper[] = {
 
 Mips16TargetLowering::Mips16TargetLowering(MipsTargetMachine &TM)
   : MipsTargetLowering(TM) {
-  //
-  // set up as if mips32 and then revert so we can test the mechanism
-  // for switching
-  addRegisterClass(MVT::i32, &Mips::GPR32RegClass);
-  addRegisterClass(MVT::f32, &Mips::FGR32RegClass);
-  computeRegisterProperties();
-  clearRegisterClasses();
 
   // Set up the register classes
   addRegisterClass(MVT::i32, &Mips::CPU16RegsRegClass);