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Make ConstantInt not care about sign any more. To ensure the AsmParser can

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still check the validity of signed values an overload to isValueValidForType
was added to allow passing in an int64_t to check.

llvm-svn: 32663
This commit is contained in:
Reid Spencer 2006-12-19 01:28:19 +00:00
parent 28c15ed860
commit e9d6e54b36
2 changed files with 25 additions and 17 deletions
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9
include/llvm/Constants.h
View File

@ -181,9 +181,12 @@ public:
/// This static method returns true if the type Ty is big enough to
/// represent the value V. This can be used to avoid having the get method
/// assert when V is larger than Ty can represent.
/// assert when V is larger than Ty can represent. Note that values are
/// always treated as unsigned so if the intention is to represent a signed
/// type, you must do the conversion first.
/// @returns true if V is a valid value for type Ty
/// @brief Determine if the value is in range for the given type.
static bool isValueValidForType(const Type *Ty, uint64_t V);
static bool isValueValidForType(const Type *Ty, int64_t V);
/// @returns true if this is the null integer value.
@ -205,7 +208,7 @@ public:
int64_t V = getSExtValue();
if (V < 0) return false; // Be careful about wrap-around on 'long's
++V;
return !isValueValidForType(getType()->getSignedVersion(), V) || V < 0;
return !isValueValidForType(getType(), V) || V < 0;
}
return isAllOnesValue();
}
@ -219,7 +222,7 @@ public:
int64_t V = getSExtValue();
if (V > 0) return false; // Be careful about wrap-around on 'long's
--V;
return !isValueValidForType(getType()->getSignedVersion(), V) || V > 0;
return !isValueValidForType(getType(), V) || V > 0;
}
return getZExtValue() == 0;
}

33
lib/VMCore/Constants.cpp
View File

@ -592,26 +592,31 @@ getWithOperands(const std::vector<Constant*> &Ops) const {
//===----------------------------------------------------------------------===//
// isValueValidForType implementations
bool ConstantInt::isValueValidForType(const Type *Ty, uint64_t Val) {
switch (Ty->getTypeID()) {
default: return false; // These can't be represented as integers!
case Type::SByteTyID:
case Type::UByteTyID: return Val <= UINT8_MAX;
case Type::ShortTyID:
case Type::UShortTyID:return Val <= UINT16_MAX;
case Type::IntTyID:
case Type::UIntTyID: return Val <= UINT32_MAX;
case Type::LongTyID:
case Type::ULongTyID: return true; // always true, has to fit in largest type
}
}
bool ConstantInt::isValueValidForType(const Type *Ty, int64_t Val) {
switch (Ty->getTypeID()) {
default:
return false; // These can't be represented as integers!!!
// Signed types...
default: return false; // These can't be represented as integers!
case Type::SByteTyID:
return (Val <= INT8_MAX && Val >= INT8_MIN);
case Type::UByteTyID:
return (Val >= 0) && (Val <= UINT8_MAX);
case Type::UByteTyID: return (Val >= INT8_MIN && Val <= INT8_MAX);
case Type::ShortTyID:
return (Val <= INT16_MAX && Val >= INT16_MIN);
case Type::UShortTyID:
return (Val >= 0) && (Val <= UINT16_MAX);
case Type::UShortTyID:return (Val >= INT16_MIN && Val <= UINT16_MAX);
case Type::IntTyID:
return (Val <= int(INT32_MAX) && Val >= int(INT32_MIN));
case Type::UIntTyID:
return (Val >= 0) && (Val <= UINT32_MAX);
case Type::UIntTyID: return (Val >= INT32_MIN && Val <= UINT32_MAX);
case Type::LongTyID:
case Type::ULongTyID:
return true; // always true, has to fit in largest type
case Type::ULongTyID: return true; // always true, has to fit in largest type
}
}