diff --git a/lib/CodeGen/AsmPrinter/AsmPrinter.cpp b/lib/CodeGen/AsmPrinter/AsmPrinter.cpp
index db1b37a..0f0ac77 100644
--- a/lib/CodeGen/AsmPrinter/AsmPrinter.cpp
+++ b/lib/CodeGen/AsmPrinter/AsmPrinter.cpp
@@ -510,12 +510,8 @@
   }
   
   // Check for spill-induced copies
-  unsigned SrcReg, DstReg, SrcSubIdx, DstSubIdx;
-  if (TM.getInstrInfo()->isMoveInstr(MI, SrcReg, DstReg,
-                                     SrcSubIdx, DstSubIdx)) {
-    if (MI.getAsmPrinterFlag(MachineInstr::ReloadReuse))
-      CommentOS << " Reload Reuse\n";
-  }
+  if (MI.getAsmPrinterFlag(MachineInstr::ReloadReuse))
+    CommentOS << " Reload Reuse\n";
 }
 
 /// EmitImplicitDef - This method emits the specified machine instruction
diff --git a/lib/CodeGen/LiveIntervalAnalysis.cpp b/lib/CodeGen/LiveIntervalAnalysis.cpp
index 194d03d..9e65edb 100644
--- a/lib/CodeGen/LiveIntervalAnalysis.cpp
+++ b/lib/CodeGen/LiveIntervalAnalysis.cpp
@@ -188,10 +188,6 @@
     const MachineInstr &MI = *I;
 
     // Allow copies to and from li.reg
-    unsigned SrcReg, DstReg, SrcSubReg, DstSubReg;
-    if (tii_->isMoveInstr(MI, SrcReg, DstReg, SrcSubReg, DstSubReg))
-      if (SrcReg == li.reg || DstReg == li.reg)
-        continue;
     if (MI.isCopy())
       if (MI.getOperand(0).getReg() == li.reg ||
           MI.getOperand(1).getReg() == li.reg)
@@ -324,9 +320,7 @@
       mi->addRegisterDefined(interval.reg);
 
     MachineInstr *CopyMI = NULL;
-    unsigned SrcReg, DstReg, SrcSubReg, DstSubReg;
-    if (mi->isCopyLike() ||
-        tii_->isMoveInstr(*mi, SrcReg, DstReg, SrcSubReg, DstSubReg)) {
+    if (mi->isCopyLike()) {
       CopyMI = mi;
     }
 
@@ -454,9 +448,7 @@
       OldValNo->setCopy(0);
 
       // A re-def may be a copy. e.g. %reg1030:6<def> = VMOVD %reg1026, ...
-      unsigned SrcReg, DstReg, SrcSubReg, DstSubReg;
-      if (PartReDef && (mi->isCopyLike() ||
-          tii_->isMoveInstr(*mi, SrcReg, DstReg, SrcSubReg, DstSubReg)))
+      if (PartReDef && mi->isCopyLike())
         OldValNo->setCopy(&*mi);
       
       // Add the new live interval which replaces the range for the input copy.
@@ -485,9 +477,7 @@
 
       VNInfo *ValNo;
       MachineInstr *CopyMI = NULL;
-      unsigned SrcReg, DstReg, SrcSubReg, DstSubReg;
-      if (mi->isCopyLike() ||
-          tii_->isMoveInstr(*mi, SrcReg, DstReg, SrcSubReg, DstSubReg))
+      if (mi->isCopyLike())
         CopyMI = mi;
       ValNo = interval.getNextValue(defIndex, CopyMI, true, VNInfoAllocator);
       
@@ -602,9 +592,7 @@
                              getOrCreateInterval(MO.getReg()));
   else if (allocatableRegs_[MO.getReg()]) {
     MachineInstr *CopyMI = NULL;
-    unsigned SrcReg, DstReg, SrcSubReg, DstSubReg;
-    if (MI->isCopyLike() ||
-        tii_->isMoveInstr(*MI, SrcReg, DstReg, SrcSubReg, DstSubReg))
+    if (MI->isCopyLike())
       CopyMI = MI;
     handlePhysicalRegisterDef(MBB, MI, MIIdx, MO,
                               getOrCreateInterval(MO.getReg()), CopyMI);
diff --git a/lib/CodeGen/MachineCSE.cpp b/lib/CodeGen/MachineCSE.cpp
index 833cc00..aa3a102 100644
--- a/lib/CodeGen/MachineCSE.cpp
+++ b/lib/CodeGen/MachineCSE.cpp
@@ -107,29 +107,9 @@
     MachineInstr *DefMI = MRI->getVRegDef(Reg);
     if (DefMI->getParent() != MBB)
       continue;
-    unsigned SrcReg, DstReg, SrcSubIdx, DstSubIdx;
-    if (TII->isMoveInstr(*DefMI, SrcReg, DstReg, SrcSubIdx, DstSubIdx) &&
-        TargetRegisterInfo::isVirtualRegister(SrcReg) &&
-        !SrcSubIdx && !DstSubIdx) {
-      const TargetRegisterClass *SRC   = MRI->getRegClass(SrcReg);
-      const TargetRegisterClass *RC    = MRI->getRegClass(Reg);
-      const TargetRegisterClass *NewRC = getCommonSubClass(RC, SRC);
-      if (!NewRC)
-        continue;
-      DEBUG(dbgs() << "Coalescing: " << *DefMI);
-      DEBUG(dbgs() << "*** to: " << *MI);
-      MO.setReg(SrcReg);
-      MRI->clearKillFlags(SrcReg);
-      if (NewRC != SRC)
-        MRI->setRegClass(SrcReg, NewRC);
-      DefMI->eraseFromParent();
-      ++NumCoalesces;
-      Changed = true;
-    }
-
     if (!DefMI->isCopy())
       continue;
-    SrcReg = DefMI->getOperand(1).getReg();
+    unsigned SrcReg = DefMI->getOperand(1).getReg();
     if (!TargetRegisterInfo::isVirtualRegister(SrcReg))
       continue;
     if (DefMI->getOperand(0).getSubReg() || DefMI->getOperand(1).getSubReg())
@@ -261,19 +241,13 @@
   return false;
 }
 
-static bool isCopy(const MachineInstr *MI, const TargetInstrInfo *TII) {
-  unsigned SrcReg, DstReg, SrcSubIdx, DstSubIdx;
-  return MI->isCopyLike() ||
-    TII->isMoveInstr(*MI, SrcReg, DstReg, SrcSubIdx, DstSubIdx);
-}
-
 bool MachineCSE::isCSECandidate(MachineInstr *MI) {
   if (MI->isLabel() || MI->isPHI() || MI->isImplicitDef() ||
       MI->isKill() || MI->isInlineAsm() || MI->isDebugValue())
     return false;
 
   // Ignore copies.
-  if (isCopy(MI, TII))
+  if (MI->isCopyLike())
     return false;
 
   // Ignore stuff that we obviously can't move.
@@ -329,7 +303,7 @@
            E = MRI->use_nodbg_end(); I != E; ++I) {
       MachineInstr *Use = &*I;
       // Ignore copies.
-      if (!isCopy(Use, TII)) {
+      if (!Use->isCopyLike()) {
         HasNonCopyUse = true;
         break;
       }
@@ -385,7 +359,7 @@
       // Look for trivial copy coalescing opportunities.
       if (PerformTrivialCoalescing(MI, MBB)) {
         // After coalescing MI itself may become a copy.
-        if (isCopy(MI, TII))
+        if (MI->isCopyLike())
           continue;
         FoundCSE = VNT.count(MI);
       }
diff --git a/lib/CodeGen/OptimizePHIs.cpp b/lib/CodeGen/OptimizePHIs.cpp
index 1613fe2..9b7a4ea 100644
--- a/lib/CodeGen/OptimizePHIs.cpp
+++ b/lib/CodeGen/OptimizePHIs.cpp
@@ -101,16 +101,10 @@
     MachineInstr *SrcMI = MRI->getVRegDef(SrcReg);
 
     // Skip over register-to-register moves.
-    unsigned MvSrcReg, MvDstReg, SrcSubIdx, DstSubIdx;
-    if (SrcMI &&
-        TII->isMoveInstr(*SrcMI, MvSrcReg, MvDstReg, SrcSubIdx, DstSubIdx) &&
-        SrcSubIdx == 0 && DstSubIdx == 0 &&
-        TargetRegisterInfo::isVirtualRegister(MvSrcReg))
-      SrcMI = MRI->getVRegDef(MvSrcReg);
-    else if (SrcMI && SrcMI->isCopy() &&
-             !SrcMI->getOperand(0).getSubReg() &&
-             !SrcMI->getOperand(1).getSubReg() &&
-           TargetRegisterInfo::isVirtualRegister(SrcMI->getOperand(1).getReg()))
+    if (SrcMI && SrcMI->isCopy() &&
+        !SrcMI->getOperand(0).getSubReg() &&
+        !SrcMI->getOperand(1).getSubReg() &&
+        TargetRegisterInfo::isVirtualRegister(SrcMI->getOperand(1).getReg()))
       SrcMI = MRI->getVRegDef(SrcMI->getOperand(1).getReg());
     if (!SrcMI)
       return false;
diff --git a/lib/CodeGen/PreAllocSplitting.cpp b/lib/CodeGen/PreAllocSplitting.cpp
index fb2f909..4cbd53a 100644
--- a/lib/CodeGen/PreAllocSplitting.cpp
+++ b/lib/CodeGen/PreAllocSplitting.cpp
@@ -676,11 +676,7 @@
     VNInfo* NewVN = LI->getNextValue(DefIdx, 0, true, Alloc);
     
     // If the def is a move, set the copy field.
-    unsigned SrcReg, DstReg, SrcSubIdx, DstSubIdx;
-    if (TII->isMoveInstr(*DI, SrcReg, DstReg, SrcSubIdx, DstSubIdx)) {
-      if (DstReg == LI->reg)
-        NewVN->setCopy(&*DI);
-    } else if (DI->isCopyLike() && DI->getOperand(0).getReg() == LI->reg)
+    if (DI->isCopyLike() && DI->getOperand(0).getReg() == LI->reg)
       NewVN->setCopy(&*DI);
 
     NewVNs[&*DI] = NewVN;
diff --git a/lib/CodeGen/ProcessImplicitDefs.cpp b/lib/CodeGen/ProcessImplicitDefs.cpp
index 2e31908..023af79 100644
--- a/lib/CodeGen/ProcessImplicitDefs.cpp
+++ b/lib/CodeGen/ProcessImplicitDefs.cpp
@@ -46,12 +46,6 @@
                                             unsigned Reg, unsigned OpIdx,
                                             const TargetInstrInfo *tii_,
                                             SmallSet<unsigned, 8> &ImpDefRegs) {
-  unsigned SrcReg, DstReg, SrcSubReg, DstSubReg;
-  if (tii_->isMoveInstr(*MI, SrcReg, DstReg, SrcSubReg, DstSubReg) &&
-      Reg == SrcReg &&
-      (DstSubReg == 0 || ImpDefRegs.count(DstReg)))
-    return true;
-
   switch(OpIdx) {
   case 1:
     return MI->isCopy() && (MI->getOperand(0).getSubReg() == 0 ||
@@ -75,14 +69,6 @@
       return true;
     return false;
   }
-
-  unsigned SrcReg, DstReg, SrcSubReg, DstSubReg;
-  if (tii_->isMoveInstr(*MI, SrcReg, DstReg, SrcSubReg, DstSubReg)) {
-    if (Reg != SrcReg)
-      return false;
-    if (DstSubReg == 0 || ImpDefRegs.count(DstReg))
-      return true;
-  }
   return false;
 }
 
diff --git a/lib/CodeGen/RegAllocFast.cpp b/lib/CodeGen/RegAllocFast.cpp
index f44478e..6bfadf9 100644
--- a/lib/CodeGen/RegAllocFast.cpp
+++ b/lib/CodeGen/RegAllocFast.cpp
@@ -520,12 +520,9 @@
     if ((!Hint || !TargetRegisterInfo::isPhysicalRegister(Hint)) &&
         MRI->hasOneNonDBGUse(VirtReg)) {
       const MachineInstr &UseMI = *MRI->use_nodbg_begin(VirtReg);
-      unsigned SrcReg, DstReg, SrcSubReg, DstSubReg;
       // It's a copy, use the destination register as a hint.
       if (UseMI.isCopyLike())
         Hint = UseMI.getOperand(0).getReg();
-      else if (TII->isMoveInstr(UseMI, SrcReg, DstReg, SrcSubReg, DstSubReg))
-        Hint = DstReg;
     }
     allocVirtReg(MI, *LRI, Hint);
   } else if (LR.LastUse) {
@@ -789,14 +786,13 @@
     }
 
     // If this is a copy, we may be able to coalesce.
-    unsigned CopySrc, CopyDst, CopySrcSub, CopyDstSub;
+    unsigned CopySrc = 0, CopyDst = 0, CopySrcSub = 0, CopyDstSub = 0;
     if (MI->isCopy()) {
       CopyDst = MI->getOperand(0).getReg();
       CopySrc = MI->getOperand(1).getReg();
       CopyDstSub = MI->getOperand(0).getSubReg();
       CopySrcSub = MI->getOperand(1).getSubReg();
-    } else if (!TII->isMoveInstr(*MI, CopySrc, CopyDst, CopySrcSub, CopyDstSub))
-      CopySrc = CopyDst = 0;
+    }
 
     // Track registers used by instruction.
     UsedInInstr.reset();
diff --git a/lib/CodeGen/RegAllocLinearScan.cpp b/lib/CodeGen/RegAllocLinearScan.cpp
index 044672d..47863e3 100644
--- a/lib/CodeGen/RegAllocLinearScan.cpp
+++ b/lib/CodeGen/RegAllocLinearScan.cpp
@@ -419,20 +419,15 @@
   unsigned CandReg;
   {
     MachineInstr *CopyMI;
-    unsigned SrcReg, DstReg, SrcSubReg, DstSubReg;
     if (vni->def != SlotIndex() && vni->isDefAccurate() &&
-        (CopyMI = li_->getInstructionFromIndex(vni->def)) &&
-        (CopyMI->isCopy() ||
-         tii_->isMoveInstr(*CopyMI, SrcReg, DstReg, SrcSubReg, DstSubReg)))
+        (CopyMI = li_->getInstructionFromIndex(vni->def)) && CopyMI->isCopy())
       // Defined by a copy, try to extend SrcReg forward
-      CandReg = CopyMI->isCopy() ? CopyMI->getOperand(1).getReg() : SrcReg;
+      CandReg = CopyMI->getOperand(1).getReg();
     else if (TrivCoalesceEnds &&
-             (CopyMI =
-              li_->getInstructionFromIndex(range.end.getBaseIndex())) &&
-             tii_->isMoveInstr(*CopyMI, SrcReg, DstReg, SrcSubReg, DstSubReg) &&
-             cur.reg == SrcReg)
+            (CopyMI = li_->getInstructionFromIndex(range.end.getBaseIndex())) &&
+             CopyMI->isCopy() && cur.reg == CopyMI->getOperand(1).getReg())
       // Only used by a copy, try to extend DstReg backwards
-      CandReg = DstReg;
+      CandReg = CopyMI->getOperand(0).getReg();
     else
       return Reg;
   }
@@ -978,27 +973,10 @@
     if ((vni->def != SlotIndex()) && !vni->isUnused() &&
          vni->isDefAccurate()) {
       MachineInstr *CopyMI = li_->getInstructionFromIndex(vni->def);
-      unsigned SrcReg, DstReg, SrcSubReg, DstSubReg;
-      if (CopyMI &&
-          tii_->isMoveInstr(*CopyMI, SrcReg, DstReg, SrcSubReg, DstSubReg)) {
-        unsigned Reg = 0;
-        if (TargetRegisterInfo::isPhysicalRegister(SrcReg))
-          Reg = SrcReg;
-        else if (vrm_->isAssignedReg(SrcReg))
-          Reg = vrm_->getPhys(SrcReg);
-        if (Reg) {
-          if (SrcSubReg)
-            Reg = tri_->getSubReg(Reg, SrcSubReg);
-          if (DstSubReg)
-            Reg = tri_->getMatchingSuperReg(Reg, DstSubReg, RC);
-          if (Reg && allocatableRegs_[Reg] && RC->contains(Reg))
-            mri_->setRegAllocationHint(cur->reg, 0, Reg);
-        }
-      } else if (CopyMI && CopyMI->isCopy()) {
-        DstReg = CopyMI->getOperand(0).getReg();
-        DstSubReg = CopyMI->getOperand(0).getSubReg();
-        SrcReg = CopyMI->getOperand(1).getReg();
-        SrcSubReg = CopyMI->getOperand(1).getSubReg();
+      if (CopyMI && CopyMI->isCopy()) {
+        unsigned DstSubReg = CopyMI->getOperand(0).getSubReg();
+        unsigned SrcReg = CopyMI->getOperand(1).getReg();
+        unsigned SrcSubReg = CopyMI->getOperand(1).getSubReg();
         unsigned Reg = 0;
         if (TargetRegisterInfo::isPhysicalRegister(SrcReg))
           Reg = SrcReg;
diff --git a/lib/CodeGen/RegAllocPBQP.cpp b/lib/CodeGen/RegAllocPBQP.cpp
index 7e61a12..45104b4 100644
--- a/lib/CodeGen/RegAllocPBQP.cpp
+++ b/lib/CodeGen/RegAllocPBQP.cpp
@@ -379,12 +379,14 @@
          iItr != iEnd; ++iItr) {
 
       const MachineInstr *instr = &*iItr;
-      unsigned srcReg, dstReg, srcSubReg, dstSubReg;
 
       // If this isn't a copy then continue to the next instruction.
-      if (!tii->isMoveInstr(*instr, srcReg, dstReg, srcSubReg, dstSubReg))
+      if (!instr->isCopy())
         continue;
 
+      unsigned srcReg = instr->getOperand(1).getReg();
+      unsigned dstReg = instr->getOperand(0).getReg();
+
       // If the registers are already the same our job is nice and easy.
       if (dstReg == srcReg)
         continue;
diff --git a/lib/CodeGen/RegisterCoalescer.cpp b/lib/CodeGen/RegisterCoalescer.cpp
index ab0bc2d..02b5539 100644
--- a/lib/CodeGen/RegisterCoalescer.cpp
+++ b/lib/CodeGen/RegisterCoalescer.cpp
@@ -54,9 +54,8 @@
     DstSub = compose(MI->getOperand(0).getSubReg(), MI->getOperand(3).getImm());
     Src = MI->getOperand(2).getReg();
     SrcSub = MI->getOperand(2).getSubReg();
-  } else if (!tii_.isMoveInstr(*MI, Src, Dst, SrcSub, DstSub)) {
+  } else
     return false;
-  }
   return true;
 }
 
diff --git a/lib/CodeGen/SimpleRegisterCoalescing.cpp b/lib/CodeGen/SimpleRegisterCoalescing.cpp
index e69d3e4..7bf0fd2 100644
--- a/lib/CodeGen/SimpleRegisterCoalescing.cpp
+++ b/lib/CodeGen/SimpleRegisterCoalescing.cpp
@@ -470,16 +470,12 @@
       if (Extended)
         UseMO.setIsKill(false);
     }
-    unsigned SrcReg, DstReg, SrcSubIdx, DstSubIdx;
-    if (UseMI->isCopy()) {
-      if (UseMI->getOperand(0).getReg() != IntB.reg ||
-          UseMI->getOperand(0).getSubReg())
-        continue;
-    } else if (tii_->isMoveInstr(*UseMI, SrcReg, DstReg, SrcSubIdx, DstSubIdx)){
-      if (DstReg != IntB.reg || DstSubIdx)
-        continue;
-    } else
+    if (!UseMI->isCopy())
       continue;
+    if (UseMI->getOperand(0).getReg() != IntB.reg ||
+        UseMI->getOperand(0).getSubReg())
+      continue;
+        
     // This copy will become a noop. If it's defining a new val#,
     // remove that val# as well. However this live range is being
     // extended to the end of the existing live range defined by the copy.
@@ -628,14 +624,6 @@
       if (DefMO.getReg() == li.reg && !DefMO.getSubReg())
         DefMO.setIsDead();
     }
-    unsigned SrcReg, DstReg, SrcSubIdx, DstSubIdx;
-    if (tii_->isMoveInstr(*LastUseMI, SrcReg, DstReg, SrcSubIdx, DstSubIdx) &&
-        DstReg == li.reg && DstSubIdx == 0) {
-      // Last use is itself an identity code.
-      int DeadIdx = LastUseMI->findRegisterDefOperandIdx(li.reg,
-                                                         false, false, tri_);
-      LastUseMI->getOperand(DeadIdx).setIsDead();
-    }
     return true;
   }
 
@@ -772,16 +760,6 @@
     // A PhysReg copy that won't be coalesced can perhaps be rematerialized
     // instead.
     if (DstIsPhys) {
-      unsigned CopySrcReg, CopyDstReg, CopySrcSubIdx, CopyDstSubIdx;
-      if (tii_->isMoveInstr(*UseMI, CopySrcReg, CopyDstReg,
-                            CopySrcSubIdx, CopyDstSubIdx) &&
-          CopySrcSubIdx == 0 && CopyDstSubIdx == 0 &&
-          CopySrcReg != CopyDstReg && CopySrcReg == SrcReg &&
-          CopyDstReg != DstReg && !JoinedCopies.count(UseMI) &&
-          ReMaterializeTrivialDef(li_->getInterval(SrcReg), CopyDstReg, 0,
-                                  UseMI))
-        continue;
-
       if (UseMI->isCopy() &&
           !UseMI->getOperand(1).getSubReg() &&
           !UseMI->getOperand(0).getSubReg() &&
@@ -834,28 +812,6 @@
           dbgs() << li_->getInstructionIndex(UseMI) << "\t";
         dbgs() << *UseMI;
       });
-
-
-    // After updating the operand, check if the machine instruction has
-    // become a copy. If so, update its val# information.
-    const TargetInstrDesc &TID = UseMI->getDesc();
-    if (DstIsPhys || TID.getNumDefs() != 1 || TID.getNumOperands() <= 2)
-      continue;
-
-    unsigned CopySrcReg, CopyDstReg, CopySrcSubIdx, CopyDstSubIdx;
-    if (tii_->isMoveInstr(*UseMI, CopySrcReg, CopyDstReg,
-                          CopySrcSubIdx, CopyDstSubIdx) &&
-        CopySrcReg != CopyDstReg &&
-        (TargetRegisterInfo::isVirtualRegister(CopyDstReg) ||
-         allocatableRegs_[CopyDstReg])) {
-      LiveInterval &LI = li_->getInterval(CopyDstReg);
-      SlotIndex DefIdx =
-        li_->getInstructionIndex(UseMI).getDefIndex();
-      if (const LiveRange *DLR = LI.getLiveRangeContaining(DefIdx)) {
-        if (DLR->valno->def == DefIdx)
-          DLR->valno->setCopy(UseMI);
-      }
-    }
   }
 }
 
@@ -1543,21 +1499,19 @@
     MachineInstr *Inst = MII++;
 
     // If this isn't a copy nor a extract_subreg, we can't join intervals.
-    unsigned SrcReg, DstReg, SrcSubIdx, DstSubIdx;
-    bool isInsUndef = false;
+    unsigned SrcReg, DstReg;
     if (Inst->isCopy()) {
       DstReg = Inst->getOperand(0).getReg();
       SrcReg = Inst->getOperand(1).getReg();
     } else if (Inst->isSubregToReg()) {
       DstReg = Inst->getOperand(0).getReg();
       SrcReg = Inst->getOperand(2).getReg();
-    } else if (!tii_->isMoveInstr(*Inst, SrcReg, DstReg, SrcSubIdx, DstSubIdx))
+    } else
       continue;
 
     bool SrcIsPhys = TargetRegisterInfo::isPhysicalRegister(SrcReg);
     bool DstIsPhys = TargetRegisterInfo::isPhysicalRegister(DstReg);
-    if (isInsUndef ||
-        (li_->hasInterval(SrcReg) && li_->getInterval(SrcReg).empty()))
+    if (li_->hasInterval(SrcReg) && li_->getInterval(SrcReg).empty())
       ImpDefCopies.push_back(CopyRec(Inst, 0));
     else if (SrcIsPhys || DstIsPhys)
       PhysCopies.push_back(CopyRec(Inst, 0));
@@ -1679,11 +1633,6 @@
       MachineInstr *UseMI = Use.getParent();
       if (UseMI->isIdentityCopy())
         continue;
-      unsigned SrcReg, DstReg, SrcSubIdx, DstSubIdx;
-      if (tii_->isMoveInstr(*UseMI, SrcReg, DstReg, SrcSubIdx, DstSubIdx) &&
-          SrcReg == DstReg && SrcSubIdx == DstSubIdx)
-        // Ignore identity copies.
-        continue;
       SlotIndex Idx = li_->getInstructionIndex(UseMI);
       // FIXME: Should this be Idx != UseIdx? SlotIndex() will return something
       // that compares higher than any other interval.
@@ -1708,10 +1657,7 @@
       return NULL;
 
     // Ignore identity copies.
-    unsigned SrcReg, DstReg, SrcSubIdx, DstSubIdx;
-    if (!MI->isIdentityCopy() &&
-        !(tii_->isMoveInstr(*MI, SrcReg, DstReg, SrcSubIdx, DstSubIdx) &&
-          SrcReg == DstReg && SrcSubIdx == DstSubIdx))
+    if (!MI->isIdentityCopy())
       for (unsigned i = 0, NumOps = MI->getNumOperands(); i != NumOps; ++i) {
         MachineOperand &Use = MI->getOperand(i);
         if (Use.isReg() && Use.isUse() && Use.getReg() &&
@@ -1775,21 +1721,19 @@
     for (MachineBasicBlock::iterator mii = mbb->begin(), mie = mbb->end();
          mii != mie; ) {
       MachineInstr *MI = mii;
-      unsigned SrcReg, DstReg, SrcSubIdx, DstSubIdx;
       if (JoinedCopies.count(MI)) {
         // Delete all coalesced copies.
         bool DoDelete = true;
-        if (!tii_->isMoveInstr(*MI, SrcReg, DstReg, SrcSubIdx, DstSubIdx)) {
-          assert(MI->isCopyLike() && "Unrecognized copy instruction");
-          SrcReg = MI->getOperand(MI->isSubregToReg() ? 2 : 1).getReg();
-          if (TargetRegisterInfo::isPhysicalRegister(SrcReg))
-            // Do not delete extract_subreg, insert_subreg of physical
-            // registers unless the definition is dead. e.g.
-            // %DO<def> = INSERT_SUBREG %D0<undef>, %S0<kill>, 1
-            // or else the scavenger may complain. LowerSubregs will
-            // delete them later.
-            DoDelete = false;
-        }
+        assert(MI->isCopyLike() && "Unrecognized copy instruction");
+        unsigned SrcReg = MI->getOperand(MI->isSubregToReg() ? 2 : 1).getReg();
+        if (TargetRegisterInfo::isPhysicalRegister(SrcReg))
+          // Do not delete extract_subreg, insert_subreg of physical
+          // registers unless the definition is dead. e.g.
+          // %DO<def> = INSERT_SUBREG %D0<undef>, %S0<kill>, 1
+          // or else the scavenger may complain. LowerSubregs will
+          // delete them later.
+          DoDelete = false;
+        
         if (MI->allDefsAreDead()) {
           LiveInterval &li = li_->getInterval(SrcReg);
           if (!ShortenDeadCopySrcLiveRange(li, MI))
@@ -1840,9 +1784,8 @@
       }
 
       // If the move will be an identity move delete it
-      bool isMove= tii_->isMoveInstr(*MI, SrcReg, DstReg, SrcSubIdx, DstSubIdx);
-      if (MI->isIdentityCopy() ||
-          (isMove && SrcReg == DstReg && SrcSubIdx == DstSubIdx)) {
+      if (MI->isIdentityCopy()) {
+        unsigned SrcReg = MI->getOperand(1).getReg();
         if (li_->hasInterval(SrcReg)) {
           LiveInterval &RegInt = li_->getInterval(SrcReg);
           // If def of this move instruction is dead, remove its live range
diff --git a/lib/CodeGen/TailDuplication.cpp b/lib/CodeGen/TailDuplication.cpp
index 075db80..aac8a0a 100644
--- a/lib/CodeGen/TailDuplication.cpp
+++ b/lib/CodeGen/TailDuplication.cpp
@@ -254,14 +254,15 @@
       // SSA form.
       for (unsigned i = 0, e = Copies.size(); i != e; ++i) {
         MachineInstr *Copy = Copies[i];
-        unsigned Src, Dst, SrcSR, DstSR;
-        if (TII->isMoveInstr(*Copy, Src, Dst, SrcSR, DstSR)) {
-          MachineRegisterInfo::use_iterator UI = MRI->use_begin(Src);
-          if (++UI == MRI->use_end()) {
-            // Copy is the only use. Do trivial copy propagation here.
-            MRI->replaceRegWith(Dst, Src);
-            Copy->eraseFromParent();
-          }
+        if (!Copy->isCopy())
+          continue;
+        unsigned Dst = Copy->getOperand(0).getReg();
+        unsigned Src = Copy->getOperand(1).getReg();
+        MachineRegisterInfo::use_iterator UI = MRI->use_begin(Src);
+        if (++UI == MRI->use_end()) {
+          // Copy is the only use. Do trivial copy propagation here.
+          MRI->replaceRegWith(Dst, Src);
+          Copy->eraseFromParent();
         }
       }
 
diff --git a/lib/CodeGen/TwoAddressInstructionPass.cpp b/lib/CodeGen/TwoAddressInstructionPass.cpp
index 5649143..9c280fa 100644
--- a/lib/CodeGen/TwoAddressInstructionPass.cpp
+++ b/lib/CodeGen/TwoAddressInstructionPass.cpp
@@ -380,26 +380,18 @@
                         bool &IsSrcPhys, bool &IsDstPhys) {
   SrcReg = 0;
   DstReg = 0;
-  unsigned SrcSubIdx, DstSubIdx;
-  if (!TII->isMoveInstr(MI, SrcReg, DstReg, SrcSubIdx, DstSubIdx)) {
-    if (MI.isCopy()) {
-      DstReg = MI.getOperand(0).getReg();
-      SrcReg = MI.getOperand(1).getReg();
-    } else if (MI.isInsertSubreg()) {
-      DstReg = MI.getOperand(0).getReg();
-      SrcReg = MI.getOperand(2).getReg();
-    } else if (MI.isSubregToReg()) {
-      DstReg = MI.getOperand(0).getReg();
-      SrcReg = MI.getOperand(2).getReg();
-    }
-  }
+  if (MI.isCopy()) {
+    DstReg = MI.getOperand(0).getReg();
+    SrcReg = MI.getOperand(1).getReg();
+  } else if (MI.isInsertSubreg() || MI.isSubregToReg()) {
+    DstReg = MI.getOperand(0).getReg();
+    SrcReg = MI.getOperand(2).getReg();
+  } else
+    return false;
 
-  if (DstReg) {
-    IsSrcPhys = TargetRegisterInfo::isPhysicalRegister(SrcReg);
-    IsDstPhys = TargetRegisterInfo::isPhysicalRegister(DstReg);
-    return true;
-  }
-  return false;
+  IsSrcPhys = TargetRegisterInfo::isPhysicalRegister(SrcReg);
+  IsDstPhys = TargetRegisterInfo::isPhysicalRegister(DstReg);
+  return true;
 }
 
 /// isKilled - Test if the given register value, which is used by the given