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Add a Layout overload that takes a CXXRecordDecl. 

llvm-svn: 104695
This commit is contained in:
Anders Carlsson 2010-05-26 15:10:00 +00:00
parent c7656cdf83
commit c28a6c9251
1 changed files with 53 additions and 43 deletions
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96
clang/lib/AST/RecordLayoutBuilder.cpp
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@ -96,6 +96,7 @@ class RecordLayoutBuilder {
RecordLayoutBuilder(ASTContext &Ctx);
void Layout(const RecordDecl *D);
void Layout(const CXXRecordDecl *D);
void Layout(const ObjCInterfaceDecl *D);
void LayoutFields(const RecordDecl *D);
@ -162,6 +163,9 @@ class RecordLayoutBuilder {
/// given offset.
void UpdateEmptyClassOffsets(const FieldDecl *FD, uint64_t Offset);
/// InitializeLayout - Initialize record layout for the given record decl.
void InitializeLayout(const RecordDecl *D);
/// FinishLayout - Finalize record layout. Adjust record size based on the
/// alignment.
void FinishLayout();
@ -732,65 +736,71 @@ RecordLayoutBuilder::UpdateEmptyClassOffsets(const FieldDecl *FD,
}
}
void RecordLayoutBuilder::Layout(const RecordDecl *D) {
void RecordLayoutBuilder::InitializeLayout(const RecordDecl *D) {
IsUnion = D->isUnion();
Packed = D->hasAttr<PackedAttr>();
// The #pragma pack attribute specifies the maximum field alignment.
if (const PragmaPackAttr *PPA = D->getAttr<PragmaPackAttr>())
MaxFieldAlignment = PPA->getAlignment();
if (const AlignedAttr *AA = D->getAttr<AlignedAttr>())
UpdateAlignment(AA->getMaxAlignment());
}
// If this is a C++ class, lay out the vtable and the non-virtual bases.
const CXXRecordDecl *RD = dyn_cast<CXXRecordDecl>(D);
if (RD) {
ComputeEmptySubobjectSizes(RD);
LayoutNonVirtualBases(RD);
}
void RecordLayoutBuilder::Layout(const RecordDecl *D) {
InitializeLayout(D);
LayoutFields(D);
NonVirtualSize = Size;
NonVirtualAlignment = Alignment;
// If this is a C++ class, lay out its virtual bases and add its primary
// virtual base offsets.
if (RD) {
LayoutVirtualBases(RD, RD);
VisitedVirtualBases.clear();
AddPrimaryVirtualBaseOffsets(RD, 0, RD);
}
// Finally, round the size of the total struct up to the alignment of the
// struct itself.
FinishLayout();
}
void RecordLayoutBuilder::Layout(const CXXRecordDecl *RD) {
InitializeLayout(RD);
ComputeEmptySubobjectSizes(RD);
// Lay out the vtable and the non-virtual bases.
LayoutNonVirtualBases(RD);
LayoutFields(RD);
NonVirtualSize = Size;
NonVirtualAlignment = Alignment;
// Lay out the virtual bases and add the primary virtual base offsets.
LayoutVirtualBases(RD, RD);
VisitedVirtualBases.clear();
AddPrimaryVirtualBaseOffsets(RD, 0, RD);
// Finally, round the size of the total struct up to the alignment of the
// struct itself.
FinishLayout();
#ifndef NDEBUG
if (RD) {
// Check that we have base offsets for all bases.
for (CXXRecordDecl::base_class_const_iterator I = RD->bases_begin(),
E = RD->bases_end(); I != E; ++I) {
if (I->isVirtual())
continue;
// Check that we have base offsets for all bases.
for (CXXRecordDecl::base_class_const_iterator I = RD->bases_begin(),
E = RD->bases_end(); I != E; ++I) {
if (I->isVirtual())
continue;
const CXXRecordDecl *BaseDecl =
cast<CXXRecordDecl>(I->getType()->getAs<RecordType>()->getDecl());
assert(Bases.count(BaseDecl) && "Did not find base offset!");
}
const CXXRecordDecl *BaseDecl =
cast<CXXRecordDecl>(I->getType()->getAs<RecordType>()->getDecl());
assert(Bases.count(BaseDecl) && "Did not find base offset!");
}
// And all virtual bases.
for (CXXRecordDecl::base_class_const_iterator I = RD->vbases_begin(),
E = RD->vbases_end(); I != E; ++I) {
const CXXRecordDecl *BaseDecl =
cast<CXXRecordDecl>(I->getType()->getAs<RecordType>()->getDecl());
// And all virtual bases.
for (CXXRecordDecl::base_class_const_iterator I = RD->vbases_begin(),
E = RD->vbases_end(); I != E; ++I) {
const CXXRecordDecl *BaseDecl =
cast<CXXRecordDecl>(I->getType()->getAs<RecordType>()->getDecl());
assert(VBases.count(BaseDecl) && "Did not find base offset!");
}
assert(VBases.count(BaseDecl) && "Did not find base offset!");
}
#endif
}