[TableGen] Use "= default" (NFC) (llvm#165968)

Identified with modernize-use-equals-default.

Author: kazutakahirata

llvm/utils/TableGen/Basic/RuntimeLibcallsEmitter.cpp

@@ -154,7 +154,7 @@ class RuntimeLibcallImpl {
       Provides = ProvideMap.lookup(ProvidesDef);
   }
 
-  ~RuntimeLibcallImpl() {}
+  ~RuntimeLibcallImpl() = default;
 
   const Record *getDef() const { return TheDef; }
 

llvm/utils/TableGen/Basic/TargetFeaturesEmitter.h

@@ -43,7 +43,7 @@ class TargetFeaturesEmitter {
   void printFeatureKeyValues(raw_ostream &OS, const FeatureMapTy &FeatureMap);
   void printCPUKeyValues(raw_ostream &OS, const FeatureMapTy &FeatureMap);
   virtual void run(raw_ostream &O);
-  virtual ~TargetFeaturesEmitter() {};
+  virtual ~TargetFeaturesEmitter() = default;
 };
 } // namespace llvm
 #endif

llvm/utils/TableGen/Common/CodeGenTarget.cpp

@@ -80,7 +80,7 @@ CodeGenTarget::CodeGenTarget(const RecordKeeper &records)
   MacroFusions = Records.getAllDerivedDefinitions("Fusion");
 }
 
-CodeGenTarget::~CodeGenTarget() {}
+CodeGenTarget::~CodeGenTarget() = default;
 
 StringRef CodeGenTarget::getName() const { return TargetRec->getName(); }
 

llvm/utils/TableGen/Common/DAGISelMatcher.h

@@ -105,7 +105,7 @@ class Matcher {
   Matcher(KindTy K) : Kind(K) {}
 
 public:
-  virtual ~Matcher() {}
+  virtual ~Matcher() = default;
 
   unsigned getSize() const { return Size; }
   void setSize(unsigned sz) { Size = sz; }

llvm/utils/TableGen/Common/GlobalISel/GlobalISelMatchTable.cpp

@@ -457,7 +457,7 @@ std::optional<LLTCodeGen> llvm::gi::MVTToLLT(MVT::SimpleValueType SVT) {
 
 void Matcher::optimize() {}
 
-Matcher::~Matcher() {}
+Matcher::~Matcher() = default;
 
 //===- GroupMatcher -------------------------------------------------------===//
 
@@ -1150,11 +1150,11 @@ void RuleMatcher::insnmatchers_pop_front() { Matchers.erase(Matchers.begin()); }
 
 //===- PredicateMatcher ---------------------------------------------------===//
 
-PredicateMatcher::~PredicateMatcher() {}
+PredicateMatcher::~PredicateMatcher() = default;
 
 //===- OperandPredicateMatcher --------------------------------------------===//
 
-OperandPredicateMatcher::~OperandPredicateMatcher() {}
+OperandPredicateMatcher::~OperandPredicateMatcher() = default;
 
 bool OperandPredicateMatcher::isHigherPriorityThan(
     const OperandPredicateMatcher &B) const {
@@ -1941,7 +1941,7 @@ bool InstructionOperandMatcher::isHigherPriorityThan(
 
 //===- OperandRenderer ----------------------------------------------------===//
 
-OperandRenderer::~OperandRenderer() {}
+OperandRenderer::~OperandRenderer() = default;
 
 //===- CopyRenderer -------------------------------------------------------===//
 

llvm/utils/TableGen/Common/GlobalISel/GlobalISelMatchTable.h

@@ -1375,7 +1375,7 @@ class InstructionPredicateMatcher : public PredicateMatcher {
 public:
   InstructionPredicateMatcher(PredicateKind Kind, unsigned InsnVarID)
       : PredicateMatcher(Kind, InsnVarID) {}
-  ~InstructionPredicateMatcher() override {}
+  ~InstructionPredicateMatcher() override = default;
 
   /// Compare the priority of this object and B.
   ///
@@ -2319,7 +2319,7 @@ class MatchAction {
 
   ActionKind getKind() const { return Kind; }
 
-  virtual ~MatchAction() {}
+  virtual ~MatchAction() = default;
 
   // Some actions may need to add extra predicates to ensure they can run.
   virtual void emitAdditionalPredicates(MatchTable &Table,

llvm/utils/TableGen/FastISelEmitter.cpp

@@ -85,7 +85,7 @@ struct OperandsSignature {
     char Repr = OK_Invalid;
 
   public:
-    OpKind() {}
+    OpKind() = default;
 
     bool operator<(OpKind RHS) const { return Repr < RHS.Repr; }
     bool operator==(OpKind RHS) const { return Repr == RHS.Repr; }

llvm/utils/TableGen/GlobalISelCombinerEmitter.cpp

@@ -2441,7 +2441,7 @@ class GICombinerEmitter final : public GlobalISelMatchTableExecutorEmitter {
   explicit GICombinerEmitter(const RecordKeeper &RK,
                              const CodeGenTarget &Target, StringRef Name,
                              const Record *Combiner);
-  ~GICombinerEmitter() override {}
+  ~GICombinerEmitter() override = default;
 
   void run(raw_ostream &OS);
 };

llvm/utils/TableGen/X86DisassemblerTables.cpp

@@ -708,7 +708,7 @@ DisassemblerTables::DisassemblerTables() {
   HasConflicts = false;
 }
 
-DisassemblerTables::~DisassemblerTables() {}
+DisassemblerTables::~DisassemblerTables() = default;
 
 void DisassemblerTables::emitModRMDecision(raw_ostream &o1, raw_ostream &o2,
                                            unsigned &i1, unsigned &i2,

llvm/utils/TableGen/X86ModRMFilters.h

@@ -28,7 +28,7 @@ class ModRMFilter {
 
 public:
   /// Destructor    - Override as necessary.
-  virtual ~ModRMFilter() {}
+  virtual ~ModRMFilter() = default;
 
   /// isDumb        - Indicates whether this filter returns the same value for
   ///                 any value of the ModR/M byte.