[IR] Remove unused MINARITY operand trait tpl args, NFC (llvm#107165)

These don't look like they've been used since the original 'use-diet'
branch was merged in 2008 ( f6caff6)

Author: rnk

llvm/include/llvm/Analysis/MemorySSA.h

@@ -689,7 +689,7 @@ inline void MemoryUseOrDef::resetOptimized() {
     cast<MemoryUse>(this)->resetOptimized();
 }
 
-template <> struct OperandTraits<MemoryPhi> : public HungoffOperandTraits<2> {};
+template <> struct OperandTraits<MemoryPhi> : public HungoffOperandTraits {};
 DEFINE_TRANSPARENT_OPERAND_ACCESSORS(MemoryPhi, MemoryAccess)
 
 /// Encapsulates MemorySSA, including all data associated with memory

llvm/include/llvm/IR/Constants.h

@@ -1381,7 +1381,7 @@ class ConstantExpr : public Constant {
 
 template <>
 struct OperandTraits<ConstantExpr>
-    : public VariadicOperandTraits<ConstantExpr, 1> {};
+    : public VariadicOperandTraits<ConstantExpr> {};
 
 DEFINE_TRANSPARENT_OPERAND_ACCESSORS(ConstantExpr, Constant)
 

llvm/include/llvm/IR/Function.h

@@ -1038,8 +1038,7 @@ class LLVM_EXTERNAL_VISIBILITY Function : public GlobalObject,
 /// Return value: true =>  null pointer dereference is not undefined.
 bool NullPointerIsDefined(const Function *F, unsigned AS = 0);
 
-template <>
-struct OperandTraits<Function> : public HungoffOperandTraits<3> {};
+template <> struct OperandTraits<Function> : public HungoffOperandTraits {};
 
 DEFINE_TRANSPARENT_OPERAND_ACCESSORS(Function, Value)
 

llvm/include/llvm/IR/InstrTypes.h

@@ -2407,7 +2407,7 @@ class CallBase : public Instruction {
 };
 
 template <>
-struct OperandTraits<CallBase> : public VariadicOperandTraits<CallBase, 1> {};
+struct OperandTraits<CallBase> : public VariadicOperandTraits<CallBase> {};
 
 DEFINE_TRANSPARENT_OPERAND_ACCESSORS(CallBase, Value)
 
@@ -2474,7 +2474,7 @@ class FuncletPadInst : public Instruction {
 
 template <>
 struct OperandTraits<FuncletPadInst>
-    : public VariadicOperandTraits<FuncletPadInst, /*MINARITY=*/1> {};
+    : public VariadicOperandTraits<FuncletPadInst> {};
 
 DEFINE_TRANSPARENT_OPERAND_ACCESSORS(FuncletPadInst, Value)
 

llvm/include/llvm/IR/Instructions.h

@@ -1112,9 +1112,8 @@ class GetElementPtrInst : public Instruction {
 };
 
 template <>
-struct OperandTraits<GetElementPtrInst> :
-  public VariadicOperandTraits<GetElementPtrInst, 1> {
-};
+struct OperandTraits<GetElementPtrInst>
+    : public VariadicOperandTraits<GetElementPtrInst> {};
 
 GetElementPtrInst::GetElementPtrInst(Type *PointeeType, Value *Ptr,
                                      ArrayRef<Value *> IdxList, unsigned Values,
@@ -2723,9 +2722,7 @@ class PHINode : public Instruction {
   void growOperands();
 };
 
-template <>
-struct OperandTraits<PHINode> : public HungoffOperandTraits<2> {
-};
+template <> struct OperandTraits<PHINode> : public HungoffOperandTraits {};
 
 DEFINE_TRANSPARENT_OPERAND_ACCESSORS(PHINode, Value)
 
@@ -2825,8 +2822,7 @@ class LandingPadInst : public Instruction {
 };
 
 template <>
-struct OperandTraits<LandingPadInst> : public HungoffOperandTraits<1> {
-};
+struct OperandTraits<LandingPadInst> : public HungoffOperandTraits {};
 
 DEFINE_TRANSPARENT_OPERAND_ACCESSORS(LandingPadInst, Value)
 
@@ -2903,8 +2899,7 @@ class ReturnInst : public Instruction {
 };
 
 template <>
-struct OperandTraits<ReturnInst> : public VariadicOperandTraits<ReturnInst> {
-};
+struct OperandTraits<ReturnInst> : public VariadicOperandTraits<ReturnInst> {};
 
 DEFINE_TRANSPARENT_OPERAND_ACCESSORS(ReturnInst, Value)
 
@@ -3039,8 +3034,7 @@ class BranchInst : public Instruction {
 };
 
 template <>
-struct OperandTraits<BranchInst> : public VariadicOperandTraits<BranchInst, 1> {
-};
+struct OperandTraits<BranchInst> : public VariadicOperandTraits<BranchInst> {};
 
 DEFINE_TRANSPARENT_OPERAND_ACCESSORS(BranchInst, Value)
 
@@ -3428,9 +3422,7 @@ class SwitchInstProfUpdateWrapper {
   static CaseWeightOpt getSuccessorWeight(const SwitchInst &SI, unsigned idx);
 };
 
-template <>
-struct OperandTraits<SwitchInst> : public HungoffOperandTraits<2> {
-};
+template <> struct OperandTraits<SwitchInst> : public HungoffOperandTraits {};
 
 DEFINE_TRANSPARENT_OPERAND_ACCESSORS(SwitchInst, Value)
 
@@ -3554,8 +3546,7 @@ class IndirectBrInst : public Instruction {
 };
 
 template <>
-struct OperandTraits<IndirectBrInst> : public HungoffOperandTraits<1> {
-};
+struct OperandTraits<IndirectBrInst> : public HungoffOperandTraits {};
 
 DEFINE_TRANSPARENT_OPERAND_ACCESSORS(IndirectBrInst, Value)
 
@@ -4105,7 +4096,7 @@ class CatchSwitchInst : public Instruction {
 };
 
 template <>
-struct OperandTraits<CatchSwitchInst> : public HungoffOperandTraits<2> {};
+struct OperandTraits<CatchSwitchInst> : public HungoffOperandTraits {};
 
 DEFINE_TRANSPARENT_OPERAND_ACCESSORS(CatchSwitchInst, Value)
 
@@ -4337,7 +4328,7 @@ class CleanupReturnInst : public Instruction {
 
 template <>
 struct OperandTraits<CleanupReturnInst>
-    : public VariadicOperandTraits<CleanupReturnInst, /*MINARITY=*/1> {};
+    : public VariadicOperandTraits<CleanupReturnInst> {};
 
 DEFINE_TRANSPARENT_OPERAND_ACCESSORS(CleanupReturnInst, Value)
 

llvm/include/llvm/IR/OperandTraits.h

@@ -64,8 +64,7 @@ struct OptionalOperandTraits : public FixedNumOperandTraits<SubClass, ARITY> {
 /// when it is a prefix to the User object, and the number of Use objects is
 /// only known at allocation time.
 
-template <typename SubClass, unsigned MINARITY = 0>
-struct VariadicOperandTraits {
+template <typename SubClass> struct VariadicOperandTraits {
   static Use *op_begin(SubClass* U) {
     static_assert(
         !std::is_polymorphic<SubClass>::value,
@@ -91,7 +90,6 @@ struct VariadicOperandTraits {
 /// This is the traits class that is needed when the Use array must be
 /// resizable.
 
-template <unsigned MINARITY = 1>
 struct HungoffOperandTraits {
   static Use *op_begin(User* U) {
     return U->getHungOffOperands();

llvm/include/llvm/IR/Operator.h

@@ -533,8 +533,8 @@ class GEPOperator
 };
 
 template <>
-struct OperandTraits<GEPOperator>
-    : public VariadicOperandTraits<GEPOperator, 1> {};
+struct OperandTraits<GEPOperator> : public VariadicOperandTraits<GEPOperator> {
+};
 
 DEFINE_TRANSPARENT_OPERAND_ACCESSORS(GEPOperator, Value)
 

llvm/include/llvm/IR/User.h

@@ -42,7 +42,6 @@ template <class>
 struct OperandTraits;
 
 class User : public Value {
-  template <unsigned>
   friend struct HungoffOperandTraits;
 
   LLVM_ATTRIBUTE_ALWAYS_INLINE static void *

llvm/lib/IR/ConstantsContext.h

@@ -246,7 +246,7 @@ DEFINE_TRANSPARENT_OPERAND_ACCESSORS(ShuffleVectorConstantExpr, Value)
 
 template <>
 struct OperandTraits<GetElementPtrConstantExpr>
-    : public VariadicOperandTraits<GetElementPtrConstantExpr, 1> {};
+    : public VariadicOperandTraits<GetElementPtrConstantExpr> {};
 
 DEFINE_TRANSPARENT_OPERAND_ACCESSORS(GetElementPtrConstantExpr, Value)