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- Rename ConstantGenericIntegral -> ConstantIntegral

Browse Source 
- Add new methods to ConstantIntegral: getMaxValue, getMinValue,
   getAllOnesValue

llvm-svn: 3299
This commit is contained in:
Chris Lattner 2002-08-13 17:50:20 +00:00
parent 3e63ddad5b
commit b639abc322
1 changed files with 105 additions and 28 deletions
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133
lib/VMCore/Constants.cpp
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@ -34,30 +34,6 @@ void Constant::setName(const std::string &Name, SymbolTable *ST) {
if (Name.size()) ST->insert(Name, this);
}
// Static constructor to create a '0' constant of arbitrary type...
Constant *Constant::getNullValue(const Type *Ty) {
switch (Ty->getPrimitiveID()) {
case Type::BoolTyID: return ConstantBool::get(false);
case Type::SByteTyID:
case Type::ShortTyID:
case Type::IntTyID:
case Type::LongTyID: return ConstantSInt::get(Ty, 0);
case Type::UByteTyID:
case Type::UShortTyID:
case Type::UIntTyID:
case Type::ULongTyID: return ConstantUInt::get(Ty, 0);
case Type::FloatTyID:
case Type::DoubleTyID: return ConstantFP::get(Ty, 0);
case Type::PointerTyID:
return ConstantPointerNull::get(cast<PointerType>(Ty));
default:
return 0;
}
}
void Constant::destroyConstantImpl() {
// When a Constant is destroyed, there may be lingering
// references to the constant by other constants in the constant pool. These
@ -86,6 +62,108 @@ void Constant::destroyConstantImpl() {
delete this;
}
// Static constructor to create a '0' constant of arbitrary type...
Constant *Constant::getNullValue(const Type *Ty) {
switch (Ty->getPrimitiveID()) {
case Type::BoolTyID: return ConstantBool::get(false);
case Type::SByteTyID:
case Type::ShortTyID:
case Type::IntTyID:
case Type::LongTyID: return ConstantSInt::get(Ty, 0);
case Type::UByteTyID:
case Type::UShortTyID:
case Type::UIntTyID:
case Type::ULongTyID: return ConstantUInt::get(Ty, 0);
case Type::FloatTyID:
case Type::DoubleTyID: return ConstantFP::get(Ty, 0);
case Type::PointerTyID:
return ConstantPointerNull::get(cast<PointerType>(Ty));
default:
return 0;
}
}
// Static constructor to create the maximum constant of an integral type...
ConstantIntegral *ConstantIntegral::getMaxValue(const Type *Ty) {
switch (Ty->getPrimitiveID()) {
case Type::BoolTyID: return ConstantBool::True;
case Type::SByteTyID:
case Type::ShortTyID:
case Type::IntTyID:
case Type::LongTyID: {
// Calculate 011111111111111...
unsigned TypeBits = Ty->getPrimitiveSize()*8;
int64_t Val = INT64_MAX; // All ones
Val >>= 64-TypeBits; // Shift out unwanted 1 bits...
return ConstantSInt::get(Ty, Val);
}
case Type::UByteTyID:
case Type::UShortTyID:
case Type::UIntTyID:
case Type::ULongTyID: return getAllOnesValue(Ty);
default:
assert(0 && "Non-integral type specified!");
return 0;
}
}
// Static constructor to create the minimum constant for an integral type...
ConstantIntegral *ConstantIntegral::getMinValue(const Type *Ty) {
switch (Ty->getPrimitiveID()) {
case Type::BoolTyID: return ConstantBool::False;
case Type::SByteTyID:
case Type::ShortTyID:
case Type::IntTyID:
case Type::LongTyID: {
// Calculate 1111111111000000000000
unsigned TypeBits = Ty->getPrimitiveSize()*8;
int64_t Val = -1; // All ones
Val <<= TypeBits-1; // Shift over to the right spot
return ConstantSInt::get(Ty, Val);
}
case Type::UByteTyID:
case Type::UShortTyID:
case Type::UIntTyID:
case Type::ULongTyID: return ConstantUInt::get(Ty, 0);
default:
assert(0 && "Non-integral type specified!");
return 0;
}
}
// Static constructor to create an integral constant with all bits set
ConstantIntegral *ConstantIntegral::getAllOnesValue(const Type *Ty) {
switch (Ty->getPrimitiveID()) {
case Type::BoolTyID: return ConstantBool::True;
case Type::SByteTyID:
case Type::ShortTyID:
case Type::IntTyID:
case Type::LongTyID: return ConstantSInt::get(Ty, -1);
case Type::UByteTyID:
case Type::UShortTyID:
case Type::UIntTyID:
case Type::ULongTyID: {
// Calculate ~0 of the right type...
unsigned TypeBits = Ty->getPrimitiveSize()*8;
uint64_t Val = ~0ULL; // All ones
Val >>= 64-TypeBits; // Shift out unwanted 1 bits...
return ConstantUInt::get(Ty, Val);
}
default:
assert(0 && "Non-integral type specified!");
return 0;
}
}
//===----------------------------------------------------------------------===//
// ConstantXXX Classes
//===----------------------------------------------------------------------===//
@ -93,12 +171,11 @@ void Constant::destroyConstantImpl() {
//===----------------------------------------------------------------------===//
// Normal Constructors
ConstantBool::ConstantBool(bool V) : ConstantGenericIntegral(Type::BoolTy) {
ConstantBool::ConstantBool(bool V) : ConstantIntegral(Type::BoolTy) {
Val = V;
}
ConstantInt::ConstantInt(const Type *Ty, uint64_t V)
: ConstantGenericIntegral(Ty) {
ConstantInt::ConstantInt(const Type *Ty, uint64_t V) : ConstantIntegral(Ty) {
Val.Unsigned = V;
}
@ -164,7 +241,7 @@ ConstantExpr::ConstantExpr(Constant *C, const std::vector<Constant*> &IdxList,
//===----------------------------------------------------------------------===//
// classof implementations
bool ConstantGenericIntegral::classof(const Constant *CPV) {
bool ConstantIntegral::classof(const Constant *CPV) {
return (CPV->getType()->isIntegral() || CPV->getType() == Type::BoolTy) &&
!isa<ConstantExpr>(CPV);
}