diff options
Diffstat (limited to 'include/llvm/ADT/DenseMap.h')
-rw-r--r-- | include/llvm/ADT/DenseMap.h | 98 |
1 files changed, 1 insertions, 97 deletions
diff --git a/include/llvm/ADT/DenseMap.h b/include/llvm/ADT/DenseMap.h index c8a90eb..79672f9 100644 --- a/include/llvm/ADT/DenseMap.h +++ b/include/llvm/ADT/DenseMap.h @@ -16,6 +16,7 @@ #include "llvm/Support/PointerLikeTypeTraits.h" #include "llvm/Support/MathExtras.h" +#include "llvm/ADT/DenseMapInfo.h" #include <cassert> #include <cstring> #include <utility> @@ -23,103 +24,6 @@ namespace llvm { -template<typename T> -struct DenseMapInfo { - //static inline T getEmptyKey(); - //static inline T getTombstoneKey(); - //static unsigned getHashValue(const T &Val); - //static bool isEqual(const T &LHS, const T &RHS); - //static bool isPod() -}; - -// Provide DenseMapInfo for all pointers. -template<typename T> -struct DenseMapInfo<T*> { - static inline T* getEmptyKey() { - intptr_t Val = -1; - Val <<= PointerLikeTypeTraits<T*>::NumLowBitsAvailable; - return reinterpret_cast<T*>(Val); - } - static inline T* getTombstoneKey() { - intptr_t Val = -2; - Val <<= PointerLikeTypeTraits<T*>::NumLowBitsAvailable; - return reinterpret_cast<T*>(Val); - } - static unsigned getHashValue(const T *PtrVal) { - return (unsigned((uintptr_t)PtrVal) >> 4) ^ - (unsigned((uintptr_t)PtrVal) >> 9); - } - static bool isEqual(const T *LHS, const T *RHS) { return LHS == RHS; } - static bool isPod() { return true; } -}; - -// Provide DenseMapInfo for chars. -template<> struct DenseMapInfo<char> { - static inline char getEmptyKey() { return ~0; } - static inline char getTombstoneKey() { return ~0 - 1; } - static unsigned getHashValue(const char& Val) { return Val * 37; } - static bool isPod() { return true; } - static bool isEqual(const char &LHS, const char &RHS) { - return LHS == RHS; - } -}; - -// Provide DenseMapInfo for unsigned ints. -template<> struct DenseMapInfo<unsigned> { - static inline unsigned getEmptyKey() { return ~0; } - static inline unsigned getTombstoneKey() { return ~0 - 1; } - static unsigned getHashValue(const unsigned& Val) { return Val * 37; } - static bool isPod() { return true; } - static bool isEqual(const unsigned& LHS, const unsigned& RHS) { - return LHS == RHS; - } -}; - -// Provide DenseMapInfo for unsigned longs. -template<> struct DenseMapInfo<unsigned long> { - static inline unsigned long getEmptyKey() { return ~0L; } - static inline unsigned long getTombstoneKey() { return ~0L - 1L; } - static unsigned getHashValue(const unsigned long& Val) { - return (unsigned)(Val * 37L); - } - static bool isPod() { return true; } - static bool isEqual(const unsigned long& LHS, const unsigned long& RHS) { - return LHS == RHS; - } -}; - -// Provide DenseMapInfo for all pairs whose members have info. -template<typename T, typename U> -struct DenseMapInfo<std::pair<T, U> > { - typedef std::pair<T, U> Pair; - typedef DenseMapInfo<T> FirstInfo; - typedef DenseMapInfo<U> SecondInfo; - - static inline Pair getEmptyKey() { - return std::make_pair(FirstInfo::getEmptyKey(), - SecondInfo::getEmptyKey()); - } - static inline Pair getTombstoneKey() { - return std::make_pair(FirstInfo::getTombstoneKey(), - SecondInfo::getEmptyKey()); - } - static unsigned getHashValue(const Pair& PairVal) { - uint64_t key = (uint64_t)FirstInfo::getHashValue(PairVal.first) << 32 - | (uint64_t)SecondInfo::getHashValue(PairVal.second); - key += ~(key << 32); - key ^= (key >> 22); - key += ~(key << 13); - key ^= (key >> 8); - key += (key << 3); - key ^= (key >> 15); - key += ~(key << 27); - key ^= (key >> 31); - return (unsigned)key; - } - static bool isEqual(const Pair& LHS, const Pair& RHS) { return LHS == RHS; } - static bool isPod() { return FirstInfo::isPod() && SecondInfo::isPod(); } -}; - template<typename KeyT, typename ValueT, typename KeyInfoT = DenseMapInfo<KeyT>, typename ValueInfoT = DenseMapInfo<ValueT> > |