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switch ConstantFP's from ValueMap to DenseMap, which is much faster to query

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and is more memory efficient.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@34446 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2007-02-20 07:17:17 +00:00
parent 6b6f6ba66c
commit 9b4ee0c1bd
1 changed files with 59 additions and 51 deletions
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110
lib/VMCore/Constants.cpp
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@ -165,12 +165,9 @@ ConstantInt *ConstantInt::CreateTrueFalseVals(bool WhichOne) {
}
//---- ConstantInt::get() implementations...
//
// Provide DenseMapKeyInfo for all pointers.
namespace {
struct DenseMapIntegerKeyInfo {
typedef std::pair<uint64_t, const IntegerType*> KeyTy;
struct DenseMapInt64KeyInfo {
typedef std::pair<uint64_t, const Type*> KeyTy;
static inline KeyTy getEmptyKey() { return KeyTy(0, 0); }
static inline KeyTy getTombstoneKey() { return KeyTy(1, 0); }
static unsigned getHashValue(const KeyTy &Key) {
@ -181,8 +178,8 @@ namespace {
}
typedef DenseMap<DenseMapIntegerKeyInfo::KeyTy, ConstantInt*,
DenseMapIntegerKeyInfo> IntMapTy;
typedef DenseMap<DenseMapInt64KeyInfo::KeyTy, ConstantInt*,
DenseMapInt64KeyInfo> IntMapTy;
static ManagedStatic<IntMapTy> IntConstants;
// Get a ConstantInt from an int64_t. Note here that we canoncialize the value
@ -193,22 +190,74 @@ static ManagedStatic<IntMapTy> IntConstants;
ConstantInt *ConstantInt::get(const Type *Ty, int64_t V) {
const IntegerType *ITy = cast<IntegerType>(Ty);
V &= ITy->getBitMask();
ConstantInt *&Slot = (*IntConstants)[std::make_pair(uint64_t(V), ITy)];
ConstantInt *&Slot = (*IntConstants)[std::make_pair(uint64_t(V), Ty)];
if (Slot) return Slot;
return Slot = new ConstantInt(ITy, V);
}
//===----------------------------------------------------------------------===//
// ConstantXXX Classes
// ConstantFP
//===----------------------------------------------------------------------===//
ConstantFP::ConstantFP(const Type *Ty, double V)
: Constant(Ty, ConstantFPVal, 0, 0) {
assert(isValueValidForType(Ty, V) && "Value too large for type!");
Val = V;
}
bool ConstantFP::isNullValue() const {
return DoubleToBits(Val) == 0;
}
bool ConstantFP::isExactlyValue(double V) const {
return DoubleToBits(V) == DoubleToBits(Val);
}
namespace {
struct DenseMapInt32KeyInfo {
typedef std::pair<uint32_t, const Type*> KeyTy;
static inline KeyTy getEmptyKey() { return KeyTy(0, 0); }
static inline KeyTy getTombstoneKey() { return KeyTy(1, 0); }
static unsigned getHashValue(const KeyTy &Key) {
return DenseMapKeyInfo<void*>::getHashValue(Key.second) ^ Key.first;
}
static bool isPod() { return true; }
};
}
//---- ConstantFP::get() implementation...
//
typedef DenseMap<DenseMapInt32KeyInfo::KeyTy, ConstantFP*,
DenseMapInt32KeyInfo> FloatMapTy;
typedef DenseMap<DenseMapInt64KeyInfo::KeyTy, ConstantFP*,
DenseMapInt64KeyInfo> DoubleMapTy;
static ManagedStatic<FloatMapTy> FloatConstants;
static ManagedStatic<DoubleMapTy> DoubleConstants;
ConstantFP *ConstantFP::get(const Type *Ty, double V) {
if (Ty == Type::FloatTy) {
uint32_t IntVal = FloatToBits((float)V);
ConstantFP *&Slot = (*FloatConstants)[std::make_pair(IntVal, Ty)];
if (Slot) return Slot;
return Slot = new ConstantFP(Ty, (float)V);
} else {
assert(Ty == Type::DoubleTy);
uint64_t IntVal = DoubleToBits(V);
ConstantFP *&Slot = (*DoubleConstants)[std::make_pair(IntVal, Ty)];
if (Slot) return Slot;
return Slot = new ConstantFP(Ty, (float)V);
}
}
//===----------------------------------------------------------------------===//
// ConstantXXX Classes
//===----------------------------------------------------------------------===//
ConstantArray::ConstantArray(const ArrayType *T,
const std::vector<Constant*> &V)
: Constant(T, ConstantArrayVal, new Use[V.size()], V.size()) {
@ -847,47 +896,6 @@ public:
//---- ConstantFP::get() implementation...
//
namespace llvm {
template<>
struct ConstantCreator<ConstantFP, Type, uint64_t> {
static ConstantFP *create(const Type *Ty, uint64_t V) {
assert(Ty == Type::DoubleTy);
return new ConstantFP(Ty, BitsToDouble(V));
}
};
template<>
struct ConstantCreator<ConstantFP, Type, uint32_t> {
static ConstantFP *create(const Type *Ty, uint32_t V) {
assert(Ty == Type::FloatTy);
return new ConstantFP(Ty, BitsToFloat(V));
}
};
}
static ManagedStatic<ValueMap<uint64_t, Type, ConstantFP> > DoubleConstants;
static ManagedStatic<ValueMap<uint32_t, Type, ConstantFP> > FloatConstants;
bool ConstantFP::isNullValue() const {
return DoubleToBits(Val) == 0;
}
bool ConstantFP::isExactlyValue(double V) const {
return DoubleToBits(V) == DoubleToBits(Val);
}
ConstantFP *ConstantFP::get(const Type *Ty, double V) {
if (Ty == Type::FloatTy) {
// Force the value through memory to normalize it.
return FloatConstants->getOrCreate(Ty, FloatToBits(V));
} else {
assert(Ty == Type::DoubleTy);
return DoubleConstants->getOrCreate(Ty, DoubleToBits(V));
}
}
//---- ConstantAggregateZero::get() implementation...
//
namespace llvm {