[Clang][NFC] Remove duplicated specialization of llvm::DenseMapInfo<llvm::FoldingSetNodeID> (#159718)

In preparation of #141776

Author: cor3ntin

clang/include/clang/AST/ASTContext.h

@@ -3843,4 +3843,25 @@ typename clang::LazyGenerationalUpdatePtr<Owner, T, Update>::ValueType
  return Value;
 }
 
+template <> struct llvm::DenseMapInfo<llvm::FoldingSetNodeID> {
+ static FoldingSetNodeID getEmptyKey() { return FoldingSetNodeID{}; }
+
+ static FoldingSetNodeID getTombstoneKey() {
+ FoldingSetNodeID ID;
+ for (size_t I = 0; I < sizeof(ID) / sizeof(unsigned); ++I) {
+ ID.AddInteger(std::numeric_limits<unsigned>::max());
+ }
+ return ID;
+ }
+
+ static unsigned getHashValue(const FoldingSetNodeID &Val) {
+ return Val.ComputeHash();
+ }
+
+ static bool isEqual(const FoldingSetNodeID &LHS,
+ const FoldingSetNodeID &RHS) {
+ return LHS == RHS;
+ }
+};
+
 #endif // LLVM_CLANG_AST_ASTCONTEXT_H

clang/lib/AST/ASTContext.cpp

@@ -114,27 +114,6 @@ enum FloatingRank {
  Ibm128Rank
 };
 
-template <> struct llvm::DenseMapInfo<llvm::FoldingSetNodeID> {
- static FoldingSetNodeID getEmptyKey() { return FoldingSetNodeID{}; }
-
- static FoldingSetNodeID getTombstoneKey() {
- FoldingSetNodeID id;
- for (size_t i = 0; i < sizeof(id) / sizeof(unsigned); ++i) {
- id.AddInteger(std::numeric_limits<unsigned>::max());
- }
- return id;
- }
-
- static unsigned getHashValue(const FoldingSetNodeID &Val) {
- return Val.ComputeHash();
- }
-
- static bool isEqual(const FoldingSetNodeID &LHS,
- const FoldingSetNodeID &RHS) {
- return LHS == RHS;
- }
-};
-
 /// \returns The locations that are relevant when searching for Doc comments
 /// related to \p D.
 static SmallVector<SourceLocation, 2>

clang/lib/Sema/SemaConcept.cpp

@@ -1864,33 +1864,6 @@ NormalizedConstraint::getFoldExpandedConstraint() const {
 // ------------------------ Subsumption -----------------------------------
 //
 //
-
-template <> struct llvm::DenseMapInfo<llvm::FoldingSetNodeID> {
-
- static FoldingSetNodeID getEmptyKey() {
- FoldingSetNodeID ID;
- ID.AddInteger(std::numeric_limits<unsigned>::max());
- return ID;
- }
-
- static FoldingSetNodeID getTombstoneKey() {
- FoldingSetNodeID ID;
- for (unsigned I = 0; I < sizeof(ID) / sizeof(unsigned); ++I) {
- ID.AddInteger(std::numeric_limits<unsigned>::max());
- }
- return ID;
- }
-
- static unsigned getHashValue(const FoldingSetNodeID &Val) {
- return Val.ComputeHash();
- }
-
- static bool isEqual(const FoldingSetNodeID &LHS,
- const FoldingSetNodeID &RHS) {
- return LHS == RHS;
- }
-};
-
 SubsumptionChecker::SubsumptionChecker(Sema &SemaRef,
  SubsumptionCallable Callable)
  : SemaRef(SemaRef), Callable(Callable), NextID(1) {}