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Code gen for '.*' binary expressions - WIP. 

llvm-svn: 84800
This commit is contained in:
Fariborz Jahanian 2009-10-21 23:45:42 +00:00
parent 966526cbfb
commit 52987dc581
2 changed files with 29 additions and 2 deletions
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27
clang/lib/CodeGen/CGExprScalar.cpp
View File

@ -106,6 +106,8 @@ public:
return 0;
}
Value *VisitExpr(Expr *S);
Value *VisitPointerToDataMemberBinaryExpr(const BinaryOperator *BExpr);
Value *VisitParenExpr(ParenExpr *PE) { return Visit(PE->getSubExpr()); }
// Leaves.
@ -536,12 +538,37 @@ EmitComplexToScalarConversion(CodeGenFunction::ComplexPairTy Src,
//===----------------------------------------------------------------------===//
Value *ScalarExprEmitter::VisitExpr(Expr *E) {
if (const BinaryOperator *BExpr = dyn_cast<BinaryOperator>(E))
if (BExpr->getOpcode() == BinaryOperator::PtrMemD)
return VisitPointerToDataMemberBinaryExpr(BExpr);
CGF.ErrorUnsupported(E, "scalar expression");
if (E->getType()->isVoidType())
return 0;
return llvm::UndefValue::get(CGF.ConvertType(E->getType()));
}
Value *ScalarExprEmitter::VisitPointerToDataMemberBinaryExpr(
const BinaryOperator *E) {
Value *BaseV = EmitLValue(E->getLHS()).getAddress();
const llvm::Type *i8Ty = llvm::Type::getInt8PtrTy(CGF.getLLVMContext());
BaseV = Builder.CreateBitCast(BaseV, i8Ty);
Value *OffsetV = EmitLoadOfLValue(E->getRHS());
const llvm::Type* ResultType = ConvertType(
CGF.getContext().getPointerDiffType());
OffsetV = Builder.CreateBitCast(OffsetV, ResultType);
Value *AddV = Builder.CreateInBoundsGEP(BaseV, OffsetV, "add.ptr");
QualType Ty = E->getRHS()->getType();
const MemberPointerType *MemPtrType = Ty->getAs<MemberPointerType>();
Ty = MemPtrType->getPointeeType();
const llvm::Type* PType =
ConvertType(CGF.getContext().getPointerType(Ty));
AddV = Builder.CreateBitCast(AddV, PType);
LValue LV = LValue::MakeAddr(AddV, CGF.MakeQualifiers(Ty));
Value *InVal = CGF.EmitLoadOfLValue(LV, Ty).getScalarVal();
return InVal;
}
Value *ScalarExprEmitter::VisitShuffleVectorExpr(ShuffleVectorExpr *E) {
llvm::SmallVector<llvm::Constant*, 32> indices;
for (unsigned i = 2; i < E->getNumSubExprs(); i++) {

4
clang/test/CodeGenCXX/ptr-to-datamember.cpp
View File

@ -19,6 +19,7 @@ struct B1 : virtual V{
class A : public B, public B1 {
public:
A() : f(1.0), d(2.0), Ai(3) {}
float f;
double d;
int Ai;
@ -38,6 +39,5 @@ int main()
printf("%d\n", &A::B1::iV);
printf("%d\n", &A::B::V::iV);
printf("%d\n", &A::B1::V::iV);
// FIXME. NYI
// printf(" %d, %f, %f \n", a1.*pa, a1.f, a1.d);
printf("%d, %f, %f \n", a1.*pa, a1.*pf, a1.*pd);
}