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Move the ConstantInt uniquing table into LLVMContextImpl. This exposed a number of issues in

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our current context-passing stuff, which is also fixed here


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@76089 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Owen Anderson
2009-07-16 18:04:31 +00:00
parent f96db468fc
commit 001dbfebcb
34 changed files with 174 additions and 92 deletions
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61
lib/VMCore/Constants.cpp
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@@ -190,67 +190,6 @@ ConstantInt *ConstantInt::CreateTrueFalseVals(bool WhichOne) {
return WhichOne ? TheTrueVal : TheFalseVal;
}
namespace {
struct DenseMapAPIntKeyInfo {
struct KeyTy {
APInt val;
const Type* type;
KeyTy(const APInt& V, const Type* Ty) : val(V), type(Ty) {}
KeyTy(const KeyTy& that) : val(that.val), type(that.type) {}
bool operator==(const KeyTy& that) const {
return type == that.type && this->val == that.val;
}
bool operator!=(const KeyTy& that) const {
return !this->operator==(that);
}
};
static inline KeyTy getEmptyKey() { return KeyTy(APInt(1,0), 0); }
static inline KeyTy getTombstoneKey() { return KeyTy(APInt(1,1), 0); }
static unsigned getHashValue(const KeyTy &Key) {
return DenseMapInfo<void*>::getHashValue(Key.type) ^
Key.val.getHashValue();
}
static bool isEqual(const KeyTy &LHS, const KeyTy &RHS) {
return LHS == RHS;
}
static bool isPod() { return false; }
};
}
typedef DenseMap<DenseMapAPIntKeyInfo::KeyTy, ConstantInt*,
DenseMapAPIntKeyInfo> IntMapTy;
static ManagedStatic<IntMapTy> IntConstants;
// Get a ConstantInt from an APInt. Note that the value stored in the DenseMap
// as the key, is a DenseMapAPIntKeyInfo::KeyTy which has provided the
// operator== and operator!= to ensure that the DenseMap doesn't attempt to
// compare APInt's of different widths, which would violate an APInt class
// invariant which generates an assertion.
ConstantInt *ConstantInt::get(const APInt& V) {
// Get the corresponding integer type for the bit width of the value.
const IntegerType *ITy = IntegerType::get(V.getBitWidth());
// get an existing value or the insertion position
DenseMapAPIntKeyInfo::KeyTy Key(V, ITy);
ConstantsLock->reader_acquire();
ConstantInt *&Slot = (*IntConstants)[Key];
ConstantsLock->reader_release();
if (!Slot) {
sys::SmartScopedWriter<true> Writer(*ConstantsLock);
ConstantInt *&NewSlot = (*IntConstants)[Key];
if (!Slot) {
NewSlot = new ConstantInt(ITy, V);
}
return NewSlot;
} else {
return Slot;
}
}
//===----------------------------------------------------------------------===//
// ConstantFP
//===----------------------------------------------------------------------===//