Remove remaining calls to TII::isMoveInstr.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@108556 91177308-0d34-0410-b5e6-96231b3b80d8

include/llvm/Target/TargetInstrInfo.h

@@ -113,22 +113,6 @@ public:
     return false;
   }
 
-  /// isIdentityCopy - Return true if the instruction is a copy (or
-  /// extract_subreg, insert_subreg, subreg_to_reg) where the source and
-  /// destination registers are the same.
-  bool isIdentityCopy(const MachineInstr &MI) const {
-    unsigned SrcReg, DstReg, SrcSubIdx, DstSubIdx;
-    if (isMoveInstr(MI, SrcReg, DstReg, SrcSubIdx, DstSubIdx) &&
-        SrcReg == DstReg)
-      return true;
-
-    if ((MI.getOpcode() == TargetOpcode::INSERT_SUBREG ||
-         MI.getOpcode() == TargetOpcode::SUBREG_TO_REG) &&
-        MI.getOperand(0).getReg() == MI.getOperand(2).getReg())
-      return true;
-    return false;
-  }
-  
   /// isLoadFromStackSlot - If the specified machine instruction is a direct
   /// load from a stack slot, return the virtual or physical register number of
   /// the destination along with the FrameIndex of the loaded stack slot.  If

lib/CodeGen/CalcSpillWeights.cpp

@@ -43,7 +43,6 @@ bool CalculateSpillWeights::runOnMachineFunction(MachineFunction &fn) {
 
   LiveIntervals *lis = &getAnalysis<LiveIntervals>();
   MachineLoopInfo *loopInfo = &getAnalysis<MachineLoopInfo>();
-  const TargetInstrInfo *tii = fn.getTarget().getInstrInfo();
   MachineRegisterInfo *mri = &fn.getRegInfo();
 
   SmallSet<unsigned, 4> processed;
@@ -58,7 +57,7 @@ bool CalculateSpillWeights::runOnMachineFunction(MachineFunction &fn) {
     for (MachineBasicBlock::const_iterator mii = mbb->begin(), mie = mbb->end();
          mii != mie; ++mii) {
       const MachineInstr *mi = mii;
-      if (tii->isIdentityCopy(*mi) || mi->isImplicitDef() || mi->isDebugValue())
+      if (mi->isIdentityCopy() || mi->isImplicitDef() || mi->isDebugValue())
         continue;
 
       for (unsigned i = 0, e = mi->getNumOperands(); i != e; ++i) {

lib/CodeGen/VirtRegRewriter.cpp

@@ -2442,28 +2442,6 @@ LocalRewriter::RewriteMBB(LiveIntervals *LIs,
           Spills.disallowClobberPhysReg(VirtReg);
           goto ProcessNextInst;
         }
-        unsigned Src, Dst, SrcSR, DstSR;
-        if (TII->isMoveInstr(MI, Src, Dst, SrcSR, DstSR) &&
-            Src == Dst && SrcSR == DstSR &&
-            !MI.findRegisterUseOperand(Src)->isUndef()) {
-          ++NumDCE;
-          DEBUG(dbgs() << "Removing now-noop copy: " << MI);
-          SmallVector<unsigned, 2> KillRegs;
-          InvalidateKills(MI, TRI, RegKills, KillOps, &KillRegs);
-          if (MO.isDead() && !KillRegs.empty()) {
-            // Source register or an implicit super/sub-register use is killed.
-            assert(KillRegs[0] == Dst ||
-                   TRI->isSubRegister(KillRegs[0], Dst) ||
-                   TRI->isSuperRegister(KillRegs[0], Dst));
-            // Last def is now dead.
-            TransferDeadness(Src, RegKills, KillOps);
-          }
-          VRM->RemoveMachineInstrFromMaps(&MI);
-          MBB->erase(&MI);
-          Erased = true;
-          Spills.disallowClobberPhysReg(VirtReg);
-          goto ProcessNextInst;
-        }
 
         // If it's not a no-op copy, it clobbers the value in the destreg.
         Spills.ClobberPhysReg(VirtReg);
@@ -2541,20 +2519,6 @@ LocalRewriter::RewriteMBB(LiveIntervals *LIs,
           UpdateKills(*LastStore, TRI, RegKills, KillOps);
           goto ProcessNextInst;
         }
-        {
-          unsigned Src, Dst, SrcSR, DstSR;
-          if (TII->isMoveInstr(MI, Src, Dst, SrcSR, DstSR) &&
-              Src == Dst && SrcSR == DstSR) {
-            ++NumDCE;
-            DEBUG(dbgs() << "Removing now-noop copy: " << MI);
-            InvalidateKills(MI, TRI, RegKills, KillOps);
-            VRM->RemoveMachineInstrFromMaps(&MI);
-            MBB->erase(&MI);
-            Erased = true;
-            UpdateKills(*LastStore, TRI, RegKills, KillOps);
-            goto ProcessNextInst;
-          }
-        }
       }
     }
     ProcessNextInst: