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Privatize the ConstantFP table. I'm on a roll!

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@76097 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Owen Anderson
2009-07-16 19:05:41 +00:00
parent dfce360306
commit 914e50c841
13 changed files with 113 additions and 115 deletions
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70
lib/VMCore/Constants.cpp
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@@ -222,76 +222,6 @@ bool ConstantFP::isExactlyValue(const APFloat& V) const {
return Val.bitwiseIsEqual(V);
}
namespace {
struct DenseMapAPFloatKeyInfo {
struct KeyTy {
APFloat val;
KeyTy(const APFloat& V) : val(V){}
KeyTy(const KeyTy& that) : val(that.val) {}
bool operator==(const KeyTy& that) const {
return this->val.bitwiseIsEqual(that.val);
}
bool operator!=(const KeyTy& that) const {
return !this->operator==(that);
}
};
static inline KeyTy getEmptyKey() {
return KeyTy(APFloat(APFloat::Bogus,1));
}
static inline KeyTy getTombstoneKey() {
return KeyTy(APFloat(APFloat::Bogus,2));
}
static unsigned getHashValue(const KeyTy &Key) {
return Key.val.getHashValue();
}
static bool isEqual(const KeyTy &LHS, const KeyTy &RHS) {
return LHS == RHS;
}
static bool isPod() { return false; }
};
}
//---- ConstantFP::get() implementation...
//
typedef DenseMap<DenseMapAPFloatKeyInfo::KeyTy, ConstantFP*,
DenseMapAPFloatKeyInfo> FPMapTy;
static ManagedStatic<FPMapTy> FPConstants;
ConstantFP *ConstantFP::get(const APFloat &V) {
DenseMapAPFloatKeyInfo::KeyTy Key(V);
ConstantsLock->reader_acquire();
ConstantFP *&Slot = (*FPConstants)[Key];
ConstantsLock->reader_release();
if (!Slot) {
sys::SmartScopedWriter<true> Writer(*ConstantsLock);
ConstantFP *&NewSlot = (*FPConstants)[Key];
if (!NewSlot) {
const Type *Ty;
if (&V.getSemantics() == &APFloat::IEEEsingle)
Ty = Type::FloatTy;
else if (&V.getSemantics() == &APFloat::IEEEdouble)
Ty = Type::DoubleTy;
else if (&V.getSemantics() == &APFloat::x87DoubleExtended)
Ty = Type::X86_FP80Ty;
else if (&V.getSemantics() == &APFloat::IEEEquad)
Ty = Type::FP128Ty;
else {
assert(&V.getSemantics() == &APFloat::PPCDoubleDouble &&
"Unknown FP format");
Ty = Type::PPC_FP128Ty;
}
NewSlot = new ConstantFP(Ty, V);
}
return NewSlot;
}
return Slot;
}
//===----------------------------------------------------------------------===//
// ConstantXXX Classes
//===----------------------------------------------------------------------===//