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Compute instaceStart/instanceSize fields of the class_ro_t meta-data 

for objc2's non-fragile abi.

llvm-svn: 62945
This commit is contained in:
Fariborz Jahanian 2009-01-24 23:43:01 +00:00
parent c6d52f5dfb
commit a887e63434
1 changed files with 41 additions and 2 deletions
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43
clang/lib/CodeGen/CGObjCMac.cpp
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@ -3294,9 +3294,48 @@ void CGObjCNonFragileABIMac::GenerateClass(const ObjCImplementationDecl *ID) {
}
InstanceStart = InstanceSize = 0;
if (ObjCInterfaceDecl *OID =
const_cast<ObjCInterfaceDecl*>(ID->getClassInterface())) {
// FIXME. Share this with the one in EmitIvarList.
int countSuperClassIvars = countInheritedIvars(OID->getSuperClass());
const RecordDecl *RD = CGM.getContext().addRecordToClass(OID);
RecordDecl::field_iterator firstField = RD->field_begin();
RecordDecl::field_iterator lastField = RD->field_end();
while (countSuperClassIvars-- > 0) {
lastField = firstField;
++firstField;
}
for (RecordDecl::field_iterator e = RD->field_end(),
ifield = firstField; ifield != e; ++ifield)
lastField = ifield;
const llvm::Type *InterfaceTy =
CGM.getTypes().ConvertType(CGM.getContext().getObjCInterfaceType(OID));
const llvm::StructLayout *Layout =
CGM.getTargetData().getStructLayout(cast<llvm::StructType>(InterfaceTy));
if (lastField != RD->field_end()) {
FieldDecl *Field = *lastField;
const llvm::Type *FieldTy =
CGM.getTypes().ConvertTypeForMem(Field->getType());
unsigned Size = CGM.getTargetData().getTypePaddedSize(FieldTy);
InstanceSize = Layout->getElementOffset(
CGM.getTypes().getLLVMFieldNo(Field)) +
Size;
if (firstField == RD->field_end())
InstanceStart = InstanceSize;
else
InstanceStart = Layout->getElementOffset(CGM.getTypes().
getLLVMFieldNo(*firstField));
}
}
CLASS_RO_GV = BuildClassRoTInitializer(flags,
0,
0,ID);
InstanceStart,
InstanceSize,
ID);
TClassName = ObjCClassName + ClassName;
BuildClassMetaData(TClassName, MetaTClass, SuperClassGV, CLASS_RO_GV);