diff --git a/lib/CodeGen/RegAllocFast.cpp b/lib/CodeGen/RegAllocFast.cpp
index 88922169b30..3744b06f3ab 100644
--- a/lib/CodeGen/RegAllocFast.cpp
+++ b/lib/CodeGen/RegAllocFast.cpp
@@ -1127,7 +1127,6 @@ bool RAFast::runOnMachineFunction(MachineFunction &Fn) {
   TM = &Fn.getTarget();
   TRI = TM->getRegisterInfo();
   TII = TM->getInstrInfo();
-  MRI->freezeReservedRegs(Fn);
   RegClassInfo.runOnMachineFunction(Fn);
   UsedInInstr.clear();
   UsedInInstr.setUniverse(TRI->getNumRegs());
diff --git a/lib/CodeGen/RegAllocPBQP.cpp b/lib/CodeGen/RegAllocPBQP.cpp
index 02ebce7a11a..f58d45f1316 100644
--- a/lib/CodeGen/RegAllocPBQP.cpp
+++ b/lib/CodeGen/RegAllocPBQP.cpp
@@ -552,8 +552,6 @@ bool RegAllocPBQP::runOnMachineFunction(MachineFunction &MF) {
   vrm = &getAnalysis<VirtRegMap>();
   spiller.reset(createInlineSpiller(*this, MF, *vrm));
 
-  mri->freezeReservedRegs(MF);
-
   DEBUG(dbgs() << "PBQP Register Allocating for " << mf->getName() << "\n");
 
   // Allocator main loop: