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Remove the CovariantThunk struct. 

llvm-svn: 90523
This commit is contained in:
Anders Carlsson 2009-12-04 02:22:02 +00:00
parent 597c776c41
commit c521f952d6
1 changed files with 15 additions and 23 deletions
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38
clang/lib/CodeGen/CGVtable.cpp
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@ -129,20 +129,11 @@ private:
typedef llvm::DenseMap<uint64_t, Thunk> ThunksMapTy;
ThunksMapTy Thunks;
/// CovariantThunk - Represents a single covariant thunk.
struct CovariantThunk {
CovariantThunk() { }
CovariantThunk(CanQualType ReturnType)
: ReturnType(ReturnType) { }
/// ReturnType - The return type of the function.
CanQualType ReturnType;
};
/// CovariantThunks - The covariant thunks in a vtable.
typedef llvm::DenseMap<uint64_t, CovariantThunk> CovariantThunksMapTy;
CovariantThunksMapTy CovariantThunks;
/// BaseReturnTypes - Contains the base return types of methods who have been
/// overridden with methods whose return types require adjustment. Used for
/// generating covariant thunk information.
typedef llvm::DenseMap<uint64_t, CanQualType> BaseReturnTypesMapTy;
BaseReturnTypesMapTy BaseReturnTypes;
/// PureVirtualMethods - Pure virtual methods.
typedef llvm::DenseSet<GlobalDecl> PureVirtualMethodsSetTy;
@ -308,8 +299,8 @@ public:
Index_t Offset, int64_t CurrentVBaseOffset);
void InstallThunks() {
for (CovariantThunksMapTy::const_iterator i = CovariantThunks.begin(),
e = CovariantThunks.end(); i != e; ++i) {
for (BaseReturnTypesMapTy::const_iterator i = BaseReturnTypes.begin(),
e = BaseReturnTypes.end(); i != e; ++i) {
uint64_t Index = i->first;
GlobalDecl GD = Methods[Index];
@ -317,7 +308,8 @@ public:
if (MD->isPure())
continue;
const CovariantThunk &Thunk = i->second;
QualType BaseReturnType = i->second;
assert(Index == VtableBuilder::Index[GD] && "Thunk index mismatch!");
// Check if there is an adjustment for the 'this' pointer.
@ -334,17 +326,17 @@ public:
MD->getType()->getAs<FunctionType>()->getResultType();
int64_t NonVirtualAdjustment =
getNVOffset(Thunk.ReturnType, DerivedType) / 8;
getNVOffset(BaseReturnType, DerivedType) / 8;
int64_t VirtualAdjustment =
getVbaseOffset(Thunk.ReturnType, DerivedType);
getVbaseOffset(BaseReturnType, DerivedType);
ThunkAdjustment ReturnAdjustment(NonVirtualAdjustment, VirtualAdjustment);
CovariantThunkAdjustment Adjustment(ThisAdjustment, ReturnAdjustment);
submethods[Index] = CGM.BuildCovariantThunk(MD, Extern, Adjustment);
}
CovariantThunks.clear();
BaseReturnTypes.clear();
for (ThunksMapTy::const_iterator i = Thunks.begin(), e = Thunks.end();
i != e; ++i) {
@ -854,15 +846,15 @@ bool VtableBuilder::OverrideMethod(GlobalDecl GD, llvm::Constant *m,
// Check if we need a return type adjustment.
if (TypeConversionRequiresAdjustment(CGM.getContext(), ReturnType,
OverriddenReturnType)) {
CovariantThunk &Adjustment = CovariantThunks[i];
CanQualType &BaseReturnType = BaseReturnTypes[i];
// Get the canonical return type.
CanQualType CanReturnType =
CGM.getContext().getCanonicalType(ReturnType);
// Insert the base return type.
if (Adjustment.ReturnType.isNull())
Adjustment.ReturnType =
if (BaseReturnType.isNull())
BaseReturnType =
CGM.getContext().getCanonicalType(OverriddenReturnType);
}