+struct AnonStructTypeKeyInfo {
+ struct KeyTy {
+ ArrayRef<Type*> ETypes;
+ bool isPacked;
+ KeyTy(const ArrayRef<Type*>& E, bool P) :
+ ETypes(E), isPacked(P) {}
+ KeyTy(const KeyTy& that) :
+ ETypes(that.ETypes), isPacked(that.isPacked) {}
+ KeyTy(const StructType* ST) :
+ ETypes(ArrayRef<Type*>(ST->element_begin(), ST->element_end())),
+ isPacked(ST->isPacked()) {}
+ bool operator==(const KeyTy& that) const {
+ if (isPacked != that.isPacked)
+ return false;
+ if (ETypes != that.ETypes)
+ return false;
+ return true;
+ }
+ bool operator!=(const KeyTy& that) const {
+ return !this->operator==(that);
+ }
+ };
+ static inline StructType* getEmptyKey() {
+ return DenseMapInfo<StructType*>::getEmptyKey();
+ }
+ static inline StructType* getTombstoneKey() {
+ return DenseMapInfo<StructType*>::getTombstoneKey();
+ }
+ static unsigned getHashValue(const KeyTy& Key) {
+ return hash_combine(hash_combine_range(Key.ETypes.begin(),
+ Key.ETypes.end()),
+ Key.isPacked);
+ }
+ static unsigned getHashValue(const StructType *ST) {
+ return getHashValue(KeyTy(ST));
+ }
+ static bool isEqual(const KeyTy& LHS, const StructType *RHS) {
+ if (RHS == getEmptyKey() || RHS == getTombstoneKey())
+ return false;
+ return LHS == KeyTy(RHS);
+ }
+ static bool isEqual(const StructType *LHS, const StructType *RHS) {
+ return LHS == RHS;
+ }
+};
+
+struct FunctionTypeKeyInfo {
+ struct KeyTy {
+ const Type *ReturnType;
+ ArrayRef<Type*> Params;
+ bool isVarArg;
+ KeyTy(const Type* R, const ArrayRef<Type*>& P, bool V) :
+ ReturnType(R), Params(P), isVarArg(V) {}
+ KeyTy(const KeyTy& that) :
+ ReturnType(that.ReturnType),
+ Params(that.Params),
+ isVarArg(that.isVarArg) {}
+ KeyTy(const FunctionType* FT) :
+ ReturnType(FT->getReturnType()),
+ Params(ArrayRef<Type*>(FT->param_begin(), FT->param_end())),
+ isVarArg(FT->isVarArg()) {}
+ bool operator==(const KeyTy& that) const {
+ if (ReturnType != that.ReturnType)
+ return false;
+ if (isVarArg != that.isVarArg)
+ return false;
+ if (Params != that.Params)
+ return false;
+ return true;
+ }
+ bool operator!=(const KeyTy& that) const {
+ return !this->operator==(that);
+ }
+ };
+ static inline FunctionType* getEmptyKey() {
+ return DenseMapInfo<FunctionType*>::getEmptyKey();
+ }
+ static inline FunctionType* getTombstoneKey() {
+ return DenseMapInfo<FunctionType*>::getTombstoneKey();
+ }
+ static unsigned getHashValue(const KeyTy& Key) {
+ return hash_combine(Key.ReturnType,
+ hash_combine_range(Key.Params.begin(),
+ Key.Params.end()),
+ Key.isVarArg);
+ }
+ static unsigned getHashValue(const FunctionType *FT) {
+ return getHashValue(KeyTy(FT));
+ }
+ static bool isEqual(const KeyTy& LHS, const FunctionType *RHS) {
+ if (RHS == getEmptyKey() || RHS == getTombstoneKey())
+ return false;
+ return LHS == KeyTy(RHS);
+ }
+ static bool isEqual(const FunctionType *LHS, const FunctionType *RHS) {
+ return LHS == RHS;
+ }
+};
+
+// Provide a FoldingSetTrait::Equals specialization for MDNode that can use a
+// shortcut to avoid comparing all operands.
+template<> struct FoldingSetTrait<MDNode> : DefaultFoldingSetTrait<MDNode> {
+ static bool Equals(const MDNode &X, const FoldingSetNodeID &ID,
+ unsigned IDHash, FoldingSetNodeID &TempID) {
+ assert(!X.isNotUniqued() && "Non-uniqued MDNode in FoldingSet?");
+ // First, check if the cached hashes match. If they don't we can skip the
+ // expensive operand walk.
+ if (X.Hash != IDHash)
+ return false;
+
+ // If they match we have to compare the operands.
+ X.Profile(TempID);
+ return TempID == ID;
+ }
+ static unsigned ComputeHash(const MDNode &X, FoldingSetNodeID &) {
+ return X.Hash; // Return cached hash.
+ }
+};
+
+/// DebugRecVH - This is a CallbackVH used to keep the Scope -> index maps
+/// up to date as MDNodes mutate. This class is implemented in DebugLoc.cpp.
+class DebugRecVH : public CallbackVH {
+ /// Ctx - This is the LLVM Context being referenced.
+ LLVMContextImpl *Ctx;
+
+ /// Idx - The index into either ScopeRecordIdx or ScopeInlinedAtRecords that
+ /// this reference lives in. If this is zero, then it represents a
+ /// non-canonical entry that has no DenseMap value. This can happen due to
+ /// RAUW.
+ int Idx;
+public:
+ DebugRecVH(MDNode *n, LLVMContextImpl *ctx, int idx)
+ : CallbackVH(n), Ctx(ctx), Idx(idx) {}
+
+ MDNode *get() const {
+ return cast_or_null<MDNode>(getValPtr());
+ }
+
+ virtual void deleted();
+ virtual void allUsesReplacedWith(Value *VNew);
+};
+