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Use the existing API for base offset. Use suitable llvm type 

for offset ir-gen.

llvm-svn: 77458
This commit is contained in:
Fariborz Jahanian 2009-07-29 15:54:56 +00:00
parent b2cde2db67
commit 72b1f24bd2
1 changed files with 4 additions and 20 deletions
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24
clang/lib/CodeGen/CGCXX.cpp
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@ -167,26 +167,10 @@ llvm::Value *CodeGenFunction::AddressCXXOfBaseClass(llvm::Value *BaseValue,
const ASTRecordLayout &Layout =
getContext().getASTRecordLayout(ClassDecl);
llvm::Type *I8Ptr = VMContext.getPointerTypeUnqual(llvm::Type::Int8Ty);
unsigned Idx = 0;
bool DerivedToBaseConversion = false;
for (CXXRecordDecl::base_class_const_iterator i =
ClassDecl->bases_begin(),
e = ClassDecl->bases_end(); i != e; ++i, ++Idx) {
if (!i->isVirtual()) {
const CXXRecordDecl *Base =
cast<CXXRecordDecl>(i->getType()->getAsRecordType()->getDecl());
if (Base == BaseClassDecl) {
DerivedToBaseConversion = true;
break;
}
}
}
if (!DerivedToBaseConversion) {
assert(false && "FIXME - Only derived to imm. base convesion is supported");
return BaseValue;
}
uint64_t Offset = Layout.getFieldOffset(Idx) / 8;
llvm::Value *OffsetVal = llvm::ConstantInt::get(llvm::Type::Int32Ty, Offset);
uint64_t Offset = Layout.getBaseClassOffset(BaseClassDecl) / 8;
llvm::Value *OffsetVal =
llvm::ConstantInt::get(
CGM.getTypes().ConvertType(CGM.getContext().LongTy), Offset);
BaseValue = Builder.CreateBitCast(BaseValue, I8Ptr);
BaseValue = Builder.CreateGEP(BaseValue, OffsetVal, "add.ptr");
QualType BTy =