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Fix spello, add DenseMapInfo specialization for PointerIntPair.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60228 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2008-11-29 01:18:05 +00:00
parent d55da4de04
commit 9ac30537aa
1 changed files with 22 additions and 0 deletions
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22
include/llvm/ADT/PointerIntPair.h
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@ -18,6 +18,9 @@
namespace llvm {
template<typename T>
struct DenseMapInfo;
/// PointerIntPair - This class implements a pair of a pointer and small
/// integer. It is designed to represent this in the space required by one
/// pointer by bitmangling the integer into the low part of the pointer. This
@ -65,5 +68,24 @@ public:
}
};
// Provide specialization of DenseMapInfo for PointerIntPair.
template<typename PointerTy, unsigned IntBits, typename IntType>
struct DenseMapInfo<PointerIntPair<PointerTy, IntBits, IntType> > {
typedef PointerIntPair<PointerTy, IntBits, IntType> Ty;
static Ty getEmptyKey() {
return Ty(reinterpret_cast<PointerTy>(-1),
IntType((1 << IntBits)-1));
}
static Ty getTombstoneKey() {
return Ty(reinterpret_cast<PointerTy>(-2), IntType(0));
}
static unsigned getHashValue(Ty V) {
uintptr_t IV = reinterpret_cast<uintptr_t>(V.getOpaqueValue());
return unsigned(IV) ^ unsigned(IV >> 9);
}
static bool isEqual(const Ty &LHS, const Ty &RHS) { return LHS == RHS; }
static bool isPod() { return true; }
};
} // end namespace llvm
#endif