/// If this type is derived from a base type then return base type size.
uint64_t DebugHandlerBase::getBaseTypeSize(const DITypeRef TyRef) {
DIType *Ty = TyRef.resolve();
assert(Ty);
DIDerivedType *DDTy = dyn_cast<DIDerivedType>(Ty);
if (!DDTy)
return Ty->getSizeInBits();
unsigned Tag = DDTy->getTag();
if (Tag != dwarf::DW_TAG_member && Tag != dwarf::DW_TAG_typedef &&
Tag != dwarf::DW_TAG_const_type && Tag != dwarf::DW_TAG_volatile_type &&
Tag != dwarf::DW_TAG_restrict_type && Tag != dwarf::DW_TAG_atomic_type)
return DDTy->getSizeInBits();
DIType *BaseType = DDTy->getBaseType().resolve();
assert(BaseType && "Unexpected invalid base type");
// If this is a derived type, go ahead and get the base type, unless it's a
// reference then it's just the size of the field. Pointer types have no need
// of this since they're a different type of qualification on the type.
if (BaseType->getTag() == dwarf::DW_TAG_reference_type ||
BaseType->getTag() == dwarf::DW_TAG_rvalue_reference_type)
return Ty->getSizeInBits();
return getBaseTypeSize(BaseType);
}
/// \brief Return the size reported by the variable's type.
unsigned DIVariable::getSizeInBits(const DITypeIdentifierMap &Map) {
DIType Ty = getType().resolve(Map);
// Follow derived types until we reach a type that
// reports back a size.
while (Ty.isDerivedType() && !Ty.getSizeInBits()) {
DIDerivedType DT(&*Ty);
Ty = DT.getTypeDerivedFrom().resolve(Map);
}
assert(Ty.getSizeInBits() && "type with size 0");
return Ty.getSizeInBits();
}
/// getOriginalTypeSize - If this type is derived from a base type then
/// return base type size.
uint64_t DIDerivedType::getOriginalTypeSize() const {
unsigned Tag = getTag();
if (Tag == dwarf::DW_TAG_member || Tag == dwarf::DW_TAG_typedef ||
Tag == dwarf::DW_TAG_const_type || Tag == dwarf::DW_TAG_volatile_type ||
Tag == dwarf::DW_TAG_restrict_type) {
DIType BaseType = getTypeDerivedFrom();
// If this type is not derived from any type then take conservative
// approach.
if (!BaseType.isValid())
return getSizeInBits();
// If this is a derived type, go ahead and get the base type, unless
// it's a reference then it's just the size of the field. Pointer types
// have no need of this since they're a different type of qualification
// on the type.
if (BaseType.getTag() == dwarf::DW_TAG_reference_type)
return getSizeInBits();
else if (BaseType.isDerivedType())
return DIDerivedType(BaseType).getOriginalTypeSize();
else
return BaseType.getSizeInBits();
}
return getSizeInBits();
}
/// getOriginalTypeSize - If this type is derived from a base type then
/// return base type size.
uint64_t DIDerivedType::getOriginalTypeSize() const {
unsigned Tag = getTag();
if (Tag == dwarf::DW_TAG_member || Tag == dwarf::DW_TAG_typedef ||
Tag == dwarf::DW_TAG_const_type || Tag == dwarf::DW_TAG_volatile_type ||
Tag == dwarf::DW_TAG_restrict_type) {
DIType BaseType = getTypeDerivedFrom();
// If this type is not derived from any type then take conservative
// approach.
if (BaseType.isNull())
return getSizeInBits();
if (BaseType.isDerivedType())
return DIDerivedType(BaseType.getNode()).getOriginalTypeSize();
else
return BaseType.getSizeInBits();
}
return getSizeInBits();
}
/// addConstantValue - Add constant value entry in variable DIE.
bool CompileUnit::addConstantValue(DIE *Die, const MachineOperand &MO,
DIType Ty) {
assert (MO.isImm() && "Invalid machine operand!");
DIEBlock *Block = new (DIEValueAllocator) DIEBlock();
unsigned form = dwarf::DW_FORM_udata;
switch (Ty.getSizeInBits()) {
case 8: form = dwarf::DW_FORM_data1; break;
case 16: form = dwarf::DW_FORM_data2; break;
case 32: form = dwarf::DW_FORM_data4; break;
case 64: form = dwarf::DW_FORM_data8; break;
default: break;
}
DIBasicType BTy(Ty);
if (BTy.Verify() &&
(BTy.getEncoding() == dwarf::DW_ATE_signed
|| BTy.getEncoding() == dwarf::DW_ATE_signed_char))
addSInt(Block, 0, form, MO.getImm());
else
addUInt(Block, 0, form, MO.getImm());
addBlock(Die, dwarf::DW_AT_const_value, 0, Block);
return true;
}
