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* Cnstants are now global objects

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* ConstantPools no longer exist
* Constants are global objects in the LLVM system
* Constants are structurally equilivant if they are pointer equilivant
* Support abstract & opaque types
* Support setName on constants even though they don't track names
* Constnats don't get copy ctors anymore
* ConstPoolVal::equals is no longer useful [use ptr equivalency]
* Support generic factory classes to create and maintain constants


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@460 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2001-09-07 16:46:31 +00:00
parent 6892b126e3
commit 531daef154
1 changed files with 234 additions and 291 deletions
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537
lib/VMCore/ConstantPool.cpp
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@ -6,199 +6,43 @@
#define __STDC_LIMIT_MACROS // Get defs for INT64_MAX and friends... #define __STDC_LIMIT_MACROS // Get defs for INT64_MAX and friends...
#include "llvm/ConstPoolVals.h" #include "llvm/ConstPoolVals.h"
#include "llvm/ConstantPool.h"
#include "llvm/Support/StringExtras.h" // itostr #include "llvm/Support/StringExtras.h" // itostr
#include "llvm/DerivedTypes.h" #include "llvm/DerivedTypes.h"
#include "llvm/SymbolTable.h" #include "llvm/SymbolTable.h"
#include <algorithm> #include <algorithm>
#include <assert.h> #include <assert.h>
//===----------------------------------------------------------------------===// ConstPoolBool *ConstPoolBool::True = new ConstPoolBool(true);
// ConstantPool Class ConstPoolBool *ConstPoolBool::False = new ConstPoolBool(false);
//===----------------------------------------------------------------------===//
void ConstantPool::setParent(SymTabValue *STV) {
Parent = STV;
for (unsigned i = 0; i < Planes.size(); i++)
Planes[i]->setParent(Parent);
}
const Value *ConstantPool::getParentV() const { return Parent->getSTVParent(); }
Value *ConstantPool::getParentV() { return Parent->getSTVParent(); }
// Constant getPlane - Returns true if the type plane does not exist, otherwise
// updates the pointer to point to the correct plane.
//
bool ConstantPool::getPlane(const Type *T, const PlaneType *&Plane) const {
unsigned Ty = T->getUniqueID();
if (Ty >= Planes.size()) return true;
Plane = Planes[Ty];
return false;
}
// Constant getPlane - Returns true if the type plane does not exist, otherwise
// updates the pointer to point to the correct plane.
//
bool ConstantPool::getPlane(const Type *T, PlaneType *&Plane) {
unsigned Ty = T->getUniqueID();
if (Ty >= Planes.size()) return true;
Plane = Planes[Ty];
return false;
}
void ConstantPool::resize(unsigned size) {
unsigned oldSize = Planes.size();
Planes.resize(size, 0);
while (oldSize < size)
Planes[oldSize++] = new PlaneType(Parent, Parent);
}
ConstantPool::PlaneType &ConstantPool::getPlane(const Type *T) {
unsigned Ty = T->getUniqueID();
if (Ty >= Planes.size()) resize(Ty+1);
return *Planes[Ty];
}
// insert - Add constant into the symbol table...
void ConstantPool::insert(ConstPoolVal *N) {
unsigned Ty = N->getType()->getUniqueID();
if (Ty >= Planes.size()) resize(Ty+1);
Planes[Ty]->push_back(N);
}
bool ConstantPool::remove(ConstPoolVal *N) {
unsigned Ty = N->getType()->getUniqueID();
if (Ty >= Planes.size()) return true; // Doesn't contain any of that type
PlaneType::iterator I = ::find(Planes[Ty]->begin(), Planes[Ty]->end(), N);
if (I == Planes[Ty]->end()) return true;
Planes[Ty]->remove(I);
return false;
}
void ConstantPool::delete_all() {
dropAllReferences();
for (unsigned i = 0; i < Planes.size(); i++) {
Planes[i]->delete_all();
Planes[i]->setParent(0);
delete Planes[i];
}
Planes.clear();
}
void ConstantPool::dropAllReferences() {
for (unsigned i = 0; i < Planes.size(); i++)
for_each(Planes[i]->begin(), Planes[i]->end(),
mem_fun(&ConstPoolVal::dropAllReferences));
}
struct EqualsConstant {
const ConstPoolVal *v;
inline EqualsConstant(const ConstPoolVal *V) { v = V; }
inline bool operator()(const ConstPoolVal *V) const {
return v->equals(V);
}
};
ConstPoolVal *ConstantPool::find(const ConstPoolVal *V) {
const PlaneType *P;
if (getPlane(V->getType(), P)) return 0;
PlaneType::const_iterator PI = find_if(P->begin(), P->end(),
EqualsConstant(V));
if (PI == P->end()) return 0;
return *PI;
}
const ConstPoolVal *ConstantPool::find(const ConstPoolVal *V) const {
const PlaneType *P;
if (getPlane(V->getType(), P)) return 0;
PlaneType::const_iterator PI = find_if(P->begin(), P->end(),
EqualsConstant(V));
if (PI == P->end()) return 0;
return *PI;
}
ConstPoolVal *ConstantPool::find(const Type *Ty) {
const PlaneType *P;
if (getPlane(Type::TypeTy, P)) return 0;
// TODO: This is kinda silly
ConstPoolType V(Ty);
PlaneType::const_iterator PI =
find_if(P->begin(), P->end(), EqualsConstant(&V));
if (PI == P->end()) return 0;
return *PI;
}
const ConstPoolVal *ConstantPool::find(const Type *Ty) const {
const PlaneType *P;
if (getPlane(Type::TypeTy, P)) return 0;
// TODO: This is kinda silly
ConstPoolType V(Ty);
PlaneType::const_iterator PI =
find_if(P->begin(), P->end(), EqualsConstant(&V));
if (PI == P->end()) return 0;
return *PI;
}
struct EqualsType {
const Type *T;
inline EqualsType(const Type *t) { T = t; }
inline bool operator()(const ConstPoolVal *CPV) const {
return static_cast<const ConstPoolType*>(CPV)->getValue() == T;
}
};
// ensureTypeAvailable - This is used to make sure that the specified type is
// in the constant pool. If it is not already in the constant pool, it is
// added.
//
const Type *ConstantPool::ensureTypeAvailable(const Type *Ty) {
// Get the type type plane...
PlaneType &P = getPlane(Type::TypeTy);
PlaneType::const_iterator PI = find_if(P.begin(), P.end(), EqualsType(Ty));
if (PI == P.end()) {
ConstPoolVal *CPT = new ConstPoolType(Ty);
insert(CPT);
}
return Ty;
}
//===----------------------------------------------------------------------===// //===----------------------------------------------------------------------===//
// ConstPoolVal Class // ConstPoolVal Class
//===----------------------------------------------------------------------===// //===----------------------------------------------------------------------===//
// Specialize setName to take care of symbol table majik // Specialize setName to take care of symbol table majik
void ConstPoolVal::setName(const string &name) { void ConstPoolVal::setName(const string &Name, SymbolTable *ST) {
SymTabValue *P; assert(ST && "Type::setName - Must provide symbol table argument!");
if ((P = getParent()) && hasName()) P->getSymbolTable()->remove(this);
Value::setName(name); if (Name.size()) ST->insert(Name, this);
if (P && hasName()) P->getSymbolTable()->insert(this);
} }
// Static constructor to create a '0' constant of arbitrary type... // Static constructor to create a '0' constant of arbitrary type...
ConstPoolVal *ConstPoolVal::getNullConstant(const Type *Ty) { ConstPoolVal *ConstPoolVal::getNullConstant(const Type *Ty) {
switch (Ty->getPrimitiveID()) { switch (Ty->getPrimitiveID()) {
case Type::BoolTyID: return new ConstPoolBool(false); case Type::BoolTyID: return ConstPoolBool::get(false);
case Type::SByteTyID: case Type::SByteTyID:
case Type::ShortTyID: case Type::ShortTyID:
case Type::IntTyID: case Type::IntTyID:
case Type::LongTyID: return new ConstPoolSInt(Ty, 0); case Type::LongTyID: return ConstPoolSInt::get(Ty, 0);
case Type::UByteTyID: case Type::UByteTyID:
case Type::UShortTyID: case Type::UShortTyID:
case Type::UIntTyID: case Type::UIntTyID:
case Type::ULongTyID: return new ConstPoolUInt(Ty, 0); case Type::ULongTyID: return ConstPoolUInt::get(Ty, 0);
case Type::FloatTyID: case Type::FloatTyID:
case Type::DoubleTyID: return new ConstPoolFP(Ty, 0); case Type::DoubleTyID: return ConstPoolFP::get(Ty, 0);
default: default:
return 0; return 0;
} }
@ -213,47 +57,30 @@ ConstPoolVal *ConstPoolVal::getNullConstant(const Type *Ty) {
//===----------------------------------------------------------------------===// //===----------------------------------------------------------------------===//
// Normal Constructors // Normal Constructors
ConstPoolBool::ConstPoolBool(bool V, const string &Name = "") ConstPoolBool::ConstPoolBool(bool V) : ConstPoolVal(Type::BoolTy) {
: ConstPoolVal(Type::BoolTy, Name) {
Val = V;
}
ConstPoolBool::ConstPoolBool(const Type *Ty, bool V, const string &Name = "")
: ConstPoolVal(Type::BoolTy, Name) {
Val = V;
assert(Ty == Type::BoolTy && "BoolTy is only valid type for bool constant");
}
ConstPoolInt::ConstPoolInt(const Type *Ty, uint64_t V, const string &Name)
: ConstPoolVal(Ty, Name) { Val.Unsigned = V; }
ConstPoolInt::ConstPoolInt(const Type *Ty, int64_t V, const string &Name)
: ConstPoolVal(Ty, Name) { Val.Signed = V; }
ConstPoolSInt::ConstPoolSInt(const Type *Ty, int64_t V, const string &Name)
: ConstPoolInt(Ty, V, Name) {
//cerr << "value = " << (int)V << ": " << Ty->getName() << endl;
assert(isValueValidForType(Ty, V) && "Value too large for type!");
}
ConstPoolUInt::ConstPoolUInt(const Type *Ty, uint64_t V, const string &Name)
: ConstPoolInt(Ty, V, Name) {
//cerr << "Uvalue = " << (int)V << ": " << Ty->getName() << endl;
assert(isValueValidForType(Ty, V) && "Value too large for type!");
}
ConstPoolFP::ConstPoolFP(const Type *Ty, double V, const string &Name)
: ConstPoolVal(Ty, Name) {
assert(isValueValidForType(Ty, V) && "Value too large for type!");
Val = V; Val = V;
} }
ConstPoolType::ConstPoolType(const Type *V, const string &Name) ConstPoolInt::ConstPoolInt(const Type *Ty, uint64_t V) : ConstPoolVal(Ty) {
: ConstPoolVal(Type::TypeTy, Name), Val(V) { Val.Unsigned = V;
}
ConstPoolSInt::ConstPoolSInt(const Type *Ty, int64_t V) : ConstPoolInt(Ty, V) {
assert(isValueValidForType(Ty, V) && "Value too large for type!");
}
ConstPoolUInt::ConstPoolUInt(const Type *Ty, uint64_t V) : ConstPoolInt(Ty, V) {
assert(isValueValidForType(Ty, V) && "Value too large for type!");
}
ConstPoolFP::ConstPoolFP(const Type *Ty, double V) : ConstPoolVal(Ty) {
assert(isValueValidForType(Ty, V) && "Value too large for type!");
Val = V;
} }
ConstPoolArray::ConstPoolArray(const ArrayType *T, ConstPoolArray::ConstPoolArray(const ArrayType *T,
vector<ConstPoolVal*> &V, const vector<ConstPoolVal*> &V)
const string &Name) : ConstPoolVal(T) {
: ConstPoolVal(T, Name) {
for (unsigned i = 0; i < V.size(); i++) { for (unsigned i = 0; i < V.size(); i++) {
assert(V[i]->getType() == T->getElementType()); assert(V[i]->getType() == T->getElementType());
Operands.push_back(Use(V[i], this)); Operands.push_back(Use(V[i], this));
@ -261,9 +88,8 @@ ConstPoolArray::ConstPoolArray(const ArrayType *T,
} }
ConstPoolStruct::ConstPoolStruct(const StructType *T, ConstPoolStruct::ConstPoolStruct(const StructType *T,
vector<ConstPoolVal*> &V, const vector<ConstPoolVal*> &V)
const string &Name) : ConstPoolVal(T) {
: ConstPoolVal(T, Name) {
const StructType::ElementTypes &ETypes = T->getElementTypes(); const StructType::ElementTypes &ETypes = T->getElementTypes();
for (unsigned i = 0; i < V.size(); i++) { for (unsigned i = 0; i < V.size(); i++) {
@ -273,40 +99,6 @@ ConstPoolStruct::ConstPoolStruct(const StructType *T,
} }
//===----------------------------------------------------------------------===//
// Copy Constructors
ConstPoolBool::ConstPoolBool(const ConstPoolBool &CPB)
: ConstPoolVal(Type::BoolTy) {
Val = CPB.Val;
}
ConstPoolInt::ConstPoolInt(const ConstPoolInt &CPI)
: ConstPoolVal(CPI.getType()) {
Val.Signed = CPI.Val.Signed;
}
ConstPoolFP::ConstPoolFP(const ConstPoolFP &CPFP)
: ConstPoolVal(CPFP.getType()) {
Val = CPFP.Val;
}
ConstPoolType::ConstPoolType(const ConstPoolType &CPT)
: ConstPoolVal(Type::TypeTy), Val(CPT.Val) {
}
ConstPoolArray::ConstPoolArray(const ConstPoolArray &CPA)
: ConstPoolVal(CPA.getType()) {
for (unsigned i = 0; i < CPA.Operands.size(); i++)
Operands.push_back(Use(CPA.Operands[i], this));
}
ConstPoolStruct::ConstPoolStruct(const ConstPoolStruct &CPS)
: ConstPoolVal(CPS.getType()) {
for (unsigned i = 0; i < CPS.Operands.size(); i++)
Operands.push_back(Use(CPS.Operands[i], this));
}
//===----------------------------------------------------------------------===// //===----------------------------------------------------------------------===//
// getStrValue implementations // getStrValue implementations
@ -326,17 +118,13 @@ string ConstPoolFP::getStrValue() const {
return ftostr(Val); return ftostr(Val);
} }
string ConstPoolType::getStrValue() const {
return Val->getName();
}
string ConstPoolArray::getStrValue() const { string ConstPoolArray::getStrValue() const {
string Result = "["; string Result = "[";
if (Operands.size()) { if (Operands.size()) {
Result += " " + Operands[0]->getType()->getName() + Result += " " + Operands[0]->getType()->getDescription() +
" " + Operands[0]->castConstantAsserting()->getStrValue(); " " + Operands[0]->castConstantAsserting()->getStrValue();
for (unsigned i = 1; i < Operands.size(); i++) for (unsigned i = 1; i < Operands.size(); i++)
Result += ", " + Operands[i]->getType()->getName() + Result += ", " + Operands[i]->getType()->getDescription() +
" " + Operands[i]->castConstantAsserting()->getStrValue(); " " + Operands[i]->castConstantAsserting()->getStrValue();
} }
@ -346,63 +134,16 @@ string ConstPoolArray::getStrValue() const {
string ConstPoolStruct::getStrValue() const { string ConstPoolStruct::getStrValue() const {
string Result = "{"; string Result = "{";
if (Operands.size()) { if (Operands.size()) {
Result += " " + Operands[0]->getType()->getName() + Result += " " + Operands[0]->getType()->getDescription() +
" " + Operands[0]->castConstantAsserting()->getStrValue(); " " + Operands[0]->castConstantAsserting()->getStrValue();
for (unsigned i = 1; i < Operands.size(); i++) for (unsigned i = 1; i < Operands.size(); i++)
Result += ", " + Operands[i]->getType()->getName() + Result += ", " + Operands[i]->getType()->getDescription() +
" " + Operands[i]->castConstantAsserting()->getStrValue(); " " + Operands[i]->castConstantAsserting()->getStrValue();
} }
return Result + " }"; return Result + " }";
} }
//===----------------------------------------------------------------------===//
// equals implementations
bool ConstPoolBool::equals(const ConstPoolVal *V) const {
assert(getType() == V->getType());
return ((ConstPoolBool*)V)->getValue() == Val;
}
bool ConstPoolInt::equals(const ConstPoolVal *V) const {
assert(getType() == V->getType());
return ((ConstPoolInt*)V)->Val.Signed == Val.Signed;
}
bool ConstPoolFP::equals(const ConstPoolVal *V) const {
assert(getType() == V->getType());
return ((ConstPoolFP*)V)->getValue() == Val;
}
bool ConstPoolType::equals(const ConstPoolVal *V) const {
assert(getType() == V->getType());
return ((ConstPoolType*)V)->getValue() == Val;
}
bool ConstPoolArray::equals(const ConstPoolVal *V) const {
assert(getType() == V->getType());
ConstPoolArray *AV = (ConstPoolArray*)V;
if (Operands.size() != AV->Operands.size()) return false;
for (unsigned i = 0; i < Operands.size(); i++)
if (!Operands[i]->castConstantAsserting()->equals(
AV->Operands[i]->castConstantAsserting()))
return false;
return true;
}
bool ConstPoolStruct::equals(const ConstPoolVal *V) const {
assert(getType() == V->getType());
ConstPoolStruct *SV = (ConstPoolStruct*)V;
if (Operands.size() != SV->Operands.size()) return false;
for (unsigned i = 0; i < Operands.size(); i++)
if (!Operands[i]->castConstantAsserting()->equals(
SV->Operands[i]->castConstantAsserting()))
return false;
return true;
}
//===----------------------------------------------------------------------===// //===----------------------------------------------------------------------===//
// isValueValidForType implementations // isValueValidForType implementations
@ -459,12 +200,214 @@ bool ConstPoolFP::isValueValidForType(const Type *Ty, double Val) {
} }
}; };
//===----------------------------------------------------------------------===//
// Hash Function Implementations
#if 0
unsigned ConstPoolSInt::hash(const Type *Ty, int64_t V) {
return unsigned(Ty->getPrimitiveID() ^ V);
}
unsigned ConstPoolUInt::hash(const Type *Ty, uint64_t V) {
return unsigned(Ty->getPrimitiveID() ^ V);
}
unsigned ConstPoolFP::hash(const Type *Ty, double V) {
return Ty->getPrimitiveID() ^ unsigned(V);
}
unsigned ConstPoolArray::hash(const ArrayType *Ty,
const vector<ConstPoolVal*> &V) {
unsigned Result = (Ty->getUniqueID() << 5) ^ (Ty->getUniqueID() * 7);
for (unsigned i = 0; i < V.size(); ++i)
Result ^= V[i]->getHash() << (i & 7);
return Result;
}
unsigned ConstPoolStruct::hash(const StructType *Ty,
const vector<ConstPoolVal*> &V) {
unsigned Result = (Ty->getUniqueID() << 5) ^ (Ty->getUniqueID() * 7);
for (unsigned i = 0; i < V.size(); ++i)
Result ^= V[i]->getHash() << (i & 7);
return Result;
}
#endif
//===----------------------------------------------------------------------===//
// Factory Function Implementation
template<class ValType, class ConstPoolClass>
struct ValueMap {
typedef pair<const Type*, ValType> ConstHashKey;
map<ConstHashKey, ConstPoolClass *> Map;
inline ConstPoolClass *get(const Type *Ty, ValType V) {
map<ConstHashKey,ConstPoolClass *>::iterator I =
Map.find(ConstHashKey(Ty, V));
return (I != Map.end()) ? I->second : 0;
}
inline void add(const Type *Ty, ValType V, ConstPoolClass *CP) {
Map.insert(make_pair(ConstHashKey(Ty, V), CP));
}
};
//---- ConstPoolUInt::get() and ConstPoolSInt::get() implementations...
//
static ValueMap<uint64_t, ConstPoolInt> IntConstants;
ConstPoolSInt *ConstPoolSInt::get(const Type *Ty, int64_t V) {
ConstPoolSInt *Result = (ConstPoolSInt*)IntConstants.get(Ty, (uint64_t)V);
if (!Result) // If no preexisting value, create one now...
IntConstants.add(Ty, V, Result = new ConstPoolSInt(Ty, V));
return Result;
}
ConstPoolUInt *ConstPoolUInt::get(const Type *Ty, uint64_t V) {
ConstPoolUInt *Result = (ConstPoolUInt*)IntConstants.get(Ty, V);
if (!Result) // If no preexisting value, create one now...
IntConstants.add(Ty, V, Result = new ConstPoolUInt(Ty, V));
return Result;
}
ConstPoolInt *ConstPoolInt::get(const Type *Ty, unsigned char V) {
assert(V <= 127 && "Can only be used with very small positive constants!");
if (Ty->isSigned()) return ConstPoolSInt::get(Ty, V);
return ConstPoolUInt::get(Ty, V);
}
//---- ConstPoolFP::get() implementation...
//
static ValueMap<double, ConstPoolFP> FPConstants;
ConstPoolFP *ConstPoolFP::get(const Type *Ty, double V) {
ConstPoolFP *Result = FPConstants.get(Ty, V);
if (!Result) // If no preexisting value, create one now...
FPConstants.add(Ty, V, Result = new ConstPoolFP(Ty, V));
return Result;
}
//---- ConstPoolArray::get() implementation...
//
static ValueMap<vector<ConstPoolVal*>, ConstPoolArray> ArrayConstants;
ConstPoolArray *ConstPoolArray::get(const ArrayType *Ty,
const vector<ConstPoolVal*> &V) {
ConstPoolArray *Result = ArrayConstants.get(Ty, V);
if (!Result) // If no preexisting value, create one now...
ArrayConstants.add(Ty, V, Result = new ConstPoolArray(Ty, V));
return Result;
}
//---- ConstPoolStruct::get() implementation...
//
static ValueMap<vector<ConstPoolVal*>, ConstPoolStruct> StructConstants;
ConstPoolStruct *ConstPoolStruct::get(const StructType *Ty,
const vector<ConstPoolVal*> &V) {
ConstPoolStruct *Result = StructConstants.get(Ty, V);
if (!Result) // If no preexisting value, create one now...
StructConstants.add(Ty, V, Result = new ConstPoolStruct(Ty, V));
return Result;
}
//===----------------------------------------------------------------------===// //===----------------------------------------------------------------------===//
// Extra Method implementations // Extra Method implementations
ConstPoolInt *ConstPoolInt::get(const Type *Ty, unsigned char V) {
assert(V <= 127 && "equals: Can only be used with very small constants!");
if (Ty->isSigned()) return new ConstPoolSInt(Ty, V);
return new ConstPoolUInt(Ty, V);
// Convenience functions to get the value of an integer constant, for an
// appropriate integer or non-integer type that can be held in an integer.
// The type of the argument must be the following:
// GetSignedIntConstantValue: signed integer or bool
// GetUnsignedIntConstantValue: unsigned integer, bool, or pointer
// GetConstantValueAsSignedInt: any of the above, but the value
// must fit into a int64_t.
//
// isValidConstant is set to true if a valid constant was found.
//
int64_t
GetSignedIntConstantValue(const Value* val, bool& isValidConstant)
{
int64_t intValue = 0;
isValidConstant = false;
if (val->getValueType() == Value::ConstantVal)
{
switch(val->getType()->getPrimitiveID())
{
case Type::BoolTyID:
intValue = ((ConstPoolBool*) val)->getValue()? 1 : 0;
isValidConstant = true;
break;
case Type::SByteTyID:
case Type::ShortTyID:
case Type::IntTyID:
case Type::LongTyID:
intValue = ((ConstPoolSInt*) val)->getValue();
isValidConstant = true;
break;
default:
break;
}
}
return intValue;
}
uint64_t
GetUnsignedIntConstantValue(const Value* val, bool& isValidConstant)
{
uint64_t intValue = 0;
isValidConstant = false;
if (val->getValueType() == Value::ConstantVal)
{
switch(val->getType()->getPrimitiveID())
{
case Type::BoolTyID:
intValue = ((ConstPoolBool*) val)->getValue()? 1 : 0;
isValidConstant = true;
break;
case Type::UByteTyID:
case Type::UShortTyID:
case Type::UIntTyID:
case Type::ULongTyID:
case Type::PointerTyID:
intValue = ((ConstPoolUInt*) val)->getValue();
isValidConstant = true;
break;
default:
break;
}
}
return intValue;
}
int64_t
GetConstantValueAsSignedInt(const Value* val, bool& isValidConstant)
{
int64_t intValue = 0;
if (val->getType()->isSigned())
{
intValue = GetSignedIntConstantValue(val, isValidConstant);
}
else // non-numeric types will fall here
{
uint64_t uintValue = GetUnsignedIntConstantValue(val, isValidConstant);
if (isValidConstant && uintValue < INT64_MAX) // then safe to cast to signed
intValue = (int64_t) uintValue;
else
isValidConstant = false;
}
return intValue;
} }