[TII] remove overrides of isUnpredicatedTerminator

Summary:
They all match the base implementation in
TargetInstrInfo::isUnpredicatedTerminator.

Follow up to D62749.

Reviewers: echristo, MaskRay, hfinkel

Reviewed By: echristo

Subscribers: wuzish, nemanjai, hiraditya, kbarton, llvm-commits, srhines

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D78976

Author: nickdesaulniers

llvm/include/llvm/CodeGen/TargetInstrInfo.h

@@ -1316,7 +1316,7 @@ class TargetInstrInfo : public MCInstrInfo {
 
   /// Returns true if the instruction is a
   /// terminator instruction that has not been predicated.
-  virtual bool isUnpredicatedTerminator(const MachineInstr &MI) const;
+  bool isUnpredicatedTerminator(const MachineInstr &MI) const;
 
   /// Returns true if MI is an unconditional tail call.
   virtual bool isUnconditionalTailCall(const MachineInstr &MI) const {

llvm/lib/Target/MSP430/MSP430InstrInfo.cpp

@@ -160,18 +160,6 @@ reverseBranchCondition(SmallVectorImpl<MachineOperand> &Cond) const {
   return false;
 }
 
-bool MSP430InstrInfo::isUnpredicatedTerminator(const MachineInstr &MI) const {
-  if (!MI.isTerminator())
-    return false;
-
-  // Conditional branch is a special case.
-  if (MI.isBranch() && !MI.isBarrier())
-    return true;
-  if (!MI.isPredicable())
-    return true;
-  return !isPredicated(MI);
-}
-
 bool MSP430InstrInfo::analyzeBranch(MachineBasicBlock &MBB,
                                     MachineBasicBlock *&TBB,
                                     MachineBasicBlock *&FBB,

llvm/lib/Target/MSP430/MSP430InstrInfo.h

@@ -56,7 +56,6 @@ class MSP430InstrInfo : public MSP430GenInstrInfo {
   // Branch folding goodness
   bool
   reverseBranchCondition(SmallVectorImpl<MachineOperand> &Cond) const override;
-  bool isUnpredicatedTerminator(const MachineInstr &MI) const override;
   bool analyzeBranch(MachineBasicBlock &MBB, MachineBasicBlock *&TBB,
                      MachineBasicBlock *&FBB,
                      SmallVectorImpl<MachineOperand> &Cond,

llvm/lib/Target/PowerPC/PPCInstrInfo.cpp

@@ -1452,17 +1452,6 @@ bool PPCInstrInfo::isPredicated(const MachineInstr &MI) const {
   return false;
 }
 
-bool PPCInstrInfo::isUnpredicatedTerminator(const MachineInstr &MI) const {
-  if (!MI.isTerminator())
-    return false;
-
-  // Conditional branch is a special case.
-  if (MI.isBranch() && !MI.isBarrier())
-    return true;
-
-  return !isPredicated(MI);
-}
-
 bool PPCInstrInfo::PredicateInstruction(MachineInstr &MI,
                                         ArrayRef<MachineOperand> Pred) const {
   unsigned OpC = MI.getOpcode();

llvm/lib/Target/PowerPC/PPCInstrInfo.h

@@ -364,8 +364,6 @@ class PPCInstrInfo : public PPCGenInstrInfo {
   // Predication support.
   bool isPredicated(const MachineInstr &MI) const override;
 
-  bool isUnpredicatedTerminator(const MachineInstr &MI) const override;
-
   bool PredicateInstruction(MachineInstr &MI,
                             ArrayRef<MachineOperand> Pred) const override;