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Add case for CK_DerivedToBaseMemberPointer cast kind to 

AggExprEmitter::VisitCastExpr.

llvm-svn: 89988
This commit is contained in:
Eli Friedman 2009-11-27 04:46:20 +00:00
parent e96f1d3b2f
commit 7eb0ccaa58
1 changed files with 13 additions and 6 deletions
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19
clang/lib/CodeGen/CGExprAgg.cpp
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@ -223,6 +223,7 @@ void AggExprEmitter::VisitCastExpr(CastExpr *E) {
break;
}
case CastExpr::CK_DerivedToBaseMemberPointer:
case CastExpr::CK_BaseToDerivedMemberPointer: {
QualType SrcType = E->getSubExpr()->getType();
@ -242,16 +243,22 @@ void AggExprEmitter::VisitCastExpr(CastExpr *E) {
llvm::Value *DstAdj = Builder.CreateStructGEP(DestPtr, 1, "dst.adj");
// Now See if we need to update the adjustment.
const CXXRecordDecl *SrcDecl =
const CXXRecordDecl *BaseDecl =
cast<CXXRecordDecl>(SrcType->getAs<MemberPointerType>()->
getClass()->getAs<RecordType>()->getDecl());
const CXXRecordDecl *DstDecl =
const CXXRecordDecl *DerivedDecl =
cast<CXXRecordDecl>(E->getType()->getAs<MemberPointerType>()->
getClass()->getAs<RecordType>()->getDecl());
llvm::Constant *Adj = CGF.CGM.GetCXXBaseClassOffset(DstDecl, SrcDecl);
if (Adj)
SrcAdj = Builder.CreateAdd(SrcAdj, Adj, "adj");
if (E->getCastKind() == CastExpr::CK_DerivedToBaseMemberPointer)
std::swap(DerivedDecl, BaseDecl);
llvm::Constant *Adj = CGF.CGM.GetCXXBaseClassOffset(DerivedDecl, BaseDecl);
if (Adj) {
if (E->getCastKind() == CastExpr::CK_DerivedToBaseMemberPointer)
SrcAdj = Builder.CreateSub(SrcAdj, Adj, "adj");
else
SrcAdj = Builder.CreateAdd(SrcAdj, Adj, "adj");
}
Builder.CreateStore(SrcAdj, DstAdj, VolatileDest);
break;