#ifndef LLVM_ADT_POINTERINTPAIR_H
#define LLVM_ADT_POINTERINTPAIR_H
-#include "llvm/Support/DataTypes.h"
#include "llvm/Support/PointerLikeTypeTraits.h"
#include <cassert>
/// type.
///
/// Note that PointerIntPair always puts the Int part in the highest bits
-/// possible. For example, PointerIntPair<void*, 1,bool> will put the bit for
+/// possible. For example, PointerIntPair<void*, 1, bool> will put the bit for
/// the bool into bit #2, not bit #0, which allows the low two bits to be used
/// for something else. For example, this allows:
-/// PointerIntPair<PointerIntPair<void*, 1,bool>, 1, bool>
+/// PointerIntPair<PointerIntPair<void*, 1, bool>, 1, bool>
/// ... and the two bools will land in different bits.
///
-template <typename PointerTy, unsigned IntBits, typename IntType=unsigned>
+template <typename PointerTy, unsigned IntBits, typename IntType=unsigned,
+ typename PtrTraits = PointerLikeTypeTraits<PointerTy> >
class PointerIntPair {
intptr_t Value;
- typedef PointerLikeTypeTraits<PointerTy> PtrTraits;
enum {
/// PointerBitMask - The bits that come from the pointer.
- PointerBitMask = ~(((intptr_t)1 << PtrTraits::NumLowBitsAvailable)-1),
+ PointerBitMask =
+ ~(uintptr_t)(((intptr_t)1 << PtrTraits::NumLowBitsAvailable)-1),
+
/// IntShift - The number of low bits that we reserve for other uses, and
/// keep zero.
- IntShift = PtrTraits::NumLowBitsAvailable-IntBits,
+ IntShift = (uintptr_t)PtrTraits::NumLowBitsAvailable-IntBits,
/// IntMask - This is the unshifted mask for valid bits of the int type.
- IntMask = ((intptr_t)1 << IntBits)-1,
+ IntMask = (uintptr_t)(((intptr_t)1 << IntBits)-1),
// ShiftedIntMask - This is the bits for the integer shifted in place.
- ShiftedIntMask = IntMask << IntShift
+ ShiftedIntMask = (uintptr_t)(IntMask << IntShift)
};
public:
PointerIntPair() : Value(0) {}
}
PointerTy getPointer() const {
- return reinterpret_cast<PointerTy>(Value & PointerBitMask);
+ return PtrTraits::getFromVoidPointer(
+ reinterpret_cast<void*>(Value & PointerBitMask));
}
IntType getInt() const {
}
void setPointer(PointerTy Ptr) {
- intptr_t PtrVal = reinterpret_cast<intptr_t>(Ptr);
+ intptr_t PtrVal
+ = reinterpret_cast<intptr_t>(PtrTraits::getAsVoidPointer(Ptr));
assert((PtrVal & ((1 << PtrTraits::NumLowBitsAvailable)-1)) == 0 &&
"Pointer is not sufficiently aligned");
// Preserve all low bits, just update the pointer.
bool operator>=(const PointerIntPair &RHS) const {return Value >= RHS.Value;}
};
+template <typename T> struct isPodLike;
+template<typename PointerTy, unsigned IntBits, typename IntType>
+struct isPodLike<PointerIntPair<PointerTy, IntBits, IntType> > {
+ static const bool value = true;
+};
+
// 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 << IntBits),
- IntType((1 << IntBits)-1));
+ intptr_t Val = -1;
+ Val <<= PointerLikeTypeTraits<PointerTy>::NumLowBitsAvailable;
+ return Ty(reinterpret_cast<PointerTy>(Val), IntType((1 << IntBits)-1));
}
static Ty getTombstoneKey() {
- return Ty(reinterpret_cast<PointerTy>(-2 << IntBits), IntType(0));
+ intptr_t Val = -2;
+ Val <<= PointerLikeTypeTraits<PointerTy>::NumLowBitsAvailable;
+ return Ty(reinterpret_cast<PointerTy>(Val), 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; }
};
// Teach SmallPtrSet that PointerIntPair is "basically a pointer".
-template<typename PointerTy, unsigned IntBits, typename IntType>
-class PointerLikeTypeTraits<PointerIntPair<PointerTy, IntBits, IntType> > {
+template<typename PointerTy, unsigned IntBits, typename IntType,
+ typename PtrTraits>
+class PointerLikeTypeTraits<PointerIntPair<PointerTy, IntBits, IntType,
+ PtrTraits> > {
public:
static inline void *
getAsVoidPointer(const PointerIntPair<PointerTy, IntBits, IntType> &P) {
return PointerIntPair<PointerTy, IntBits, IntType>::getFromOpaqueValue(P);
}
enum {
- NumLowBitsAvailable =
- PointerLikeTypeTraits<PointerTy>::NumLowBitsAvailable - IntBits
+ NumLowBitsAvailable = PtrTraits::NumLowBitsAvailable - IntBits
};
};