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-rw-r--r--lib/AST/RecordLayoutBuilder.cpp102
1 files changed, 51 insertions, 51 deletions
diff --git a/lib/AST/RecordLayoutBuilder.cpp b/lib/AST/RecordLayoutBuilder.cpp
index 071e3e8955..05b5ee977c 100644
--- a/lib/AST/RecordLayoutBuilder.cpp
+++ b/lib/AST/RecordLayoutBuilder.cpp
@@ -21,8 +21,8 @@
using namespace clang;
-ASTRecordLayoutBuilder::ASTRecordLayoutBuilder(ASTContext &Ctx)
- : Ctx(Ctx), Size(0), Alignment(8), Packed(false), MaxFieldAlignment(0),
+ASTRecordLayoutBuilder::ASTRecordLayoutBuilder(ASTContext &Ctx)
+ : Ctx(Ctx), Size(0), Alignment(8), Packed(false), MaxFieldAlignment(0),
NextOffset(0), IsUnion(false), NonVirtualSize(0), NonVirtualAlignment(8) {}
/// LayoutVtable - Lay out the vtable and set PrimaryBase.
@@ -43,12 +43,12 @@ void ASTRecordLayoutBuilder::LayoutVtable(const CXXRecordDecl *RD,
}
}
-void
+void
ASTRecordLayoutBuilder::LayoutNonVirtualBases(const CXXRecordDecl *RD) {
for (CXXRecordDecl::base_class_const_iterator i = RD->bases_begin(),
e = RD->bases_end(); i != e; ++i) {
if (!i->isVirtual()) {
- const CXXRecordDecl *Base =
+ const CXXRecordDecl *Base =
cast<CXXRecordDecl>(i->getType()->getAs<RecordType>()->getDecl());
// Skip the PrimaryBase here, as it is laid down first.
if (Base != PrimaryBase || PrimaryBaseWasVirtual)
@@ -83,7 +83,7 @@ void ASTRecordLayoutBuilder::SelectPrimaryForBase(const CXXRecordDecl *RD,
for (CXXRecordDecl::base_class_const_iterator i = RD->bases_begin(),
e = RD->bases_end(); i != e; ++i) {
- const CXXRecordDecl *Base =
+ const CXXRecordDecl *Base =
cast<CXXRecordDecl>(i->getType()->getAs<RecordType>()->getDecl());
// Only bases with virtual bases participate in computing the
// indirect primary virtual base classes.
@@ -97,7 +97,7 @@ void ASTRecordLayoutBuilder::SelectPrimaryVBase(const CXXRecordDecl *RD,
llvm::SmallSet<const CXXRecordDecl*, 32> &IndirectPrimary) {
for (CXXRecordDecl::base_class_const_iterator i = RD->bases_begin(),
e = RD->bases_end(); i != e; ++i) {
- const CXXRecordDecl *Base =
+ const CXXRecordDecl *Base =
cast<CXXRecordDecl>(i->getType()->getAs<RecordType>()->getDecl());
if (!i->isVirtual()) {
SelectPrimaryVBase(Base, FirstPrimary, IndirectPrimary);
@@ -125,7 +125,7 @@ void ASTRecordLayoutBuilder::SelectPrimaryBase(const CXXRecordDecl *RD,
const CXXRecordDecl *FirstPrimary = 0;
for (CXXRecordDecl::base_class_const_iterator i = RD->bases_begin(),
e = RD->bases_end(); i != e; ++i) {
- const CXXRecordDecl *Base =
+ const CXXRecordDecl *Base =
cast<CXXRecordDecl>(i->getType()->getAs<RecordType>()->getDecl());
SelectPrimaryForBase(Base, IndirectPrimary);
}
@@ -135,7 +135,7 @@ void ASTRecordLayoutBuilder::SelectPrimaryBase(const CXXRecordDecl *RD,
for (CXXRecordDecl::base_class_const_iterator i = RD->bases_begin(),
e = RD->bases_end(); i != e; ++i) {
if (!i->isVirtual()) {
- const CXXRecordDecl *Base =
+ const CXXRecordDecl *Base =
cast<CXXRecordDecl>(i->getType()->getAs<RecordType>()->getDecl());
if (Base->isDynamicClass()) {
setPrimaryBase(Base, false);
@@ -174,7 +174,7 @@ void ASTRecordLayoutBuilder::LayoutVirtualBases(const CXXRecordDecl *RD,
llvm::SmallSet<const CXXRecordDecl*, 32> &IndirectPrimary) {
for (CXXRecordDecl::base_class_const_iterator i = RD->bases_begin(),
e = RD->bases_end(); i != e; ++i) {
- const CXXRecordDecl *Base =
+ const CXXRecordDecl *Base =
cast<CXXRecordDecl>(i->getType()->getAs<RecordType>()->getDecl());
#if 0
const ASTRecordLayout &L = Ctx.getASTRecordLayout(Base);
@@ -224,12 +224,12 @@ void ASTRecordLayoutBuilder::LayoutVirtualBases(const CXXRecordDecl *RD,
void ASTRecordLayoutBuilder::LayoutBaseNonVirtually(const CXXRecordDecl *RD,
bool IsVirtualBase) {
const ASTRecordLayout &BaseInfo = Ctx.getASTRecordLayout(RD);
- assert(BaseInfo.getDataSize() > 0 &&
+ assert(BaseInfo.getDataSize() > 0 &&
"FIXME: Handle empty classes.");
-
+
unsigned BaseAlign = BaseInfo.getNonVirtualAlign();
uint64_t BaseSize = BaseInfo.getNonVirtualSize();
-
+
// Round up the current record size to the base's alignment boundary.
Size = (Size + (BaseAlign-1)) & ~(BaseAlign-1);
@@ -260,10 +260,10 @@ void ASTRecordLayoutBuilder::LayoutBaseNonVirtually(const CXXRecordDecl *RD,
// Reserve space for this base.
Size += BaseSize;
-
+
// Remember the next available offset.
NextOffset = Size;
-
+
// Remember max struct/class alignment.
UpdateAlignment(BaseAlign);
}
@@ -276,7 +276,7 @@ void ASTRecordLayoutBuilder::Layout(const RecordDecl *D) {
// 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->getAlignment());
@@ -296,7 +296,7 @@ void ASTRecordLayoutBuilder::Layout(const RecordDecl *D) {
}
LayoutFields(D);
-
+
NonVirtualSize = Size;
NonVirtualAlignment = Alignment;
@@ -316,28 +316,28 @@ void ASTRecordLayoutBuilder::Layout(const ObjCInterfaceDecl *D,
const ASTRecordLayout &SL = Ctx.getASTObjCInterfaceLayout(SD);
UpdateAlignment(SL.getAlignment());
-
+
// We start laying out ivars not at the end of the superclass
// structure, but at the next byte following the last field.
Size = llvm::RoundUpToAlignment(SL.getDataSize(), 8);
NextOffset = Size;
}
-
+
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->getAlignment());
-
+
// Layout each ivar sequentially.
llvm::SmallVector<ObjCIvarDecl*, 16> Ivars;
Ctx.ShallowCollectObjCIvars(D, Ivars, Impl);
for (unsigned i = 0, e = Ivars.size(); i != e; ++i)
LayoutField(Ivars[i]);
-
+
// Finally, round the size of the total struct up to the alignment of the
// struct itself.
FinishLayout();
@@ -346,7 +346,7 @@ void ASTRecordLayoutBuilder::Layout(const ObjCInterfaceDecl *D,
void ASTRecordLayoutBuilder::LayoutFields(const RecordDecl *D) {
// Layout each field, for now, just sequentially, respecting alignment. In
// the future, this will need to be tweakable by targets.
- for (RecordDecl::field_iterator Field = D->field_begin(),
+ for (RecordDecl::field_iterator Field = D->field_begin(),
FieldEnd = D->field_end(); Field != FieldEnd; ++Field)
LayoutField(*Field);
}
@@ -356,19 +356,19 @@ void ASTRecordLayoutBuilder::LayoutField(const FieldDecl *D) {
uint64_t FieldOffset = IsUnion ? 0 : Size;
uint64_t FieldSize;
unsigned FieldAlign;
-
- FieldPacked |= D->hasAttr<PackedAttr>();
-
+
+ FieldPacked |= D->hasAttr<PackedAttr>();
+
if (const Expr *BitWidthExpr = D->getBitWidth()) {
// TODO: Need to check this algorithm on other targets!
// (tested on Linux-X86)
FieldSize = BitWidthExpr->EvaluateAsInt(Ctx).getZExtValue();
-
+
std::pair<uint64_t, unsigned> FieldInfo = Ctx.getTypeInfo(D->getType());
uint64_t TypeSize = FieldInfo.first;
FieldAlign = FieldInfo.second;
-
+
if (FieldPacked)
FieldAlign = 1;
if (const AlignedAttr *AA = D->getAttr<AlignedAttr>())
@@ -381,7 +381,7 @@ void ASTRecordLayoutBuilder::LayoutField(const FieldDecl *D) {
// alignment.
if (FieldSize == 0 || (FieldOffset & (FieldAlign-1)) + FieldSize > TypeSize)
FieldOffset = (FieldOffset + (FieldAlign-1)) & ~(FieldAlign-1);
-
+
// Padding members don't affect overall alignment
if (!D->getIdentifier())
FieldAlign = 1;
@@ -403,7 +403,7 @@ void ASTRecordLayoutBuilder::LayoutField(const FieldDecl *D) {
FieldSize = FieldInfo.first;
FieldAlign = FieldInfo.second;
}
-
+
if (FieldPacked)
FieldAlign = 8;
if (const AlignedAttr *AA = D->getAttr<AlignedAttr>())
@@ -411,23 +411,23 @@ void ASTRecordLayoutBuilder::LayoutField(const FieldDecl *D) {
// The maximum field alignment overrides the aligned attribute.
if (MaxFieldAlignment)
FieldAlign = std::min(FieldAlign, MaxFieldAlignment);
-
+
// Round up the current record size to the field's alignment boundary.
FieldOffset = (FieldOffset + (FieldAlign-1)) & ~(FieldAlign-1);
}
-
+
// Place this field at the current location.
FieldOffsets.push_back(FieldOffset);
-
+
// Reserve space for this field.
if (IsUnion)
Size = std::max(Size, FieldSize);
else
Size = FieldOffset + FieldSize;
-
+
// Remember the next available offset.
NextOffset = Size;
-
+
// Remember max struct/class alignment.
UpdateAlignment(FieldAlign);
}
@@ -444,14 +444,14 @@ void ASTRecordLayoutBuilder::FinishLayout() {
void ASTRecordLayoutBuilder::UpdateAlignment(unsigned NewAlignment) {
if (NewAlignment <= Alignment)
return;
-
+
assert(llvm::isPowerOf2_32(NewAlignment && "Alignment not a power of 2"));
-
+
Alignment = NewAlignment;
}
-
+
const ASTRecordLayout *
-ASTRecordLayoutBuilder::ComputeLayout(ASTContext &Ctx,
+ASTRecordLayoutBuilder::ComputeLayout(ASTContext &Ctx,
const RecordDecl *D) {
ASTRecordLayoutBuilder Builder(Ctx);
@@ -459,27 +459,27 @@ ASTRecordLayoutBuilder::ComputeLayout(ASTContext &Ctx,
if (!isa<CXXRecordDecl>(D))
return new ASTRecordLayout(Builder.Size, Builder.Alignment, Builder.Size,
- Builder.FieldOffsets.data(),
+ Builder.FieldOffsets.data(),
Builder.FieldOffsets.size());
-
+
// FIXME: This is not always correct. See the part about bitfields at
// http://www.codesourcery.com/public/cxx-abi/abi.html#POD for more info.
// FIXME: IsPODForThePurposeOfLayout should be stored in the record layout.
bool IsPODForThePurposeOfLayout = cast<CXXRecordDecl>(D)->isPOD();
-
- assert(Builder.Bases.size() == Builder.BaseOffsets.size() &&
+
+ assert(Builder.Bases.size() == Builder.BaseOffsets.size() &&
"Base offsets vector must be same size as bases vector!");
- assert(Builder.VBases.size() == Builder.VBaseOffsets.size() &&
+ assert(Builder.VBases.size() == Builder.VBaseOffsets.size() &&
"Base offsets vector must be same size as bases vector!");
// FIXME: This should be done in FinalizeLayout.
- uint64_t DataSize =
+ uint64_t DataSize =
IsPODForThePurposeOfLayout ? Builder.Size : Builder.NextOffset;
- uint64_t NonVirtualSize =
+ uint64_t NonVirtualSize =
IsPODForThePurposeOfLayout ? DataSize : Builder.NonVirtualSize;
-
+
return new ASTRecordLayout(Builder.Size, Builder.Alignment, DataSize,
- Builder.FieldOffsets.data(),
+ Builder.FieldOffsets.data(),
Builder.FieldOffsets.size(),
NonVirtualSize,
Builder.NonVirtualAlignment,
@@ -498,11 +498,11 @@ ASTRecordLayoutBuilder::ComputeLayout(ASTContext &Ctx,
const ObjCInterfaceDecl *D,
const ObjCImplementationDecl *Impl) {
ASTRecordLayoutBuilder Builder(Ctx);
-
+
Builder.Layout(D, Impl);
-
+
return new ASTRecordLayout(Builder.Size, Builder.Alignment,
Builder.NextOffset,
- Builder.FieldOffsets.data(),
+ Builder.FieldOffsets.data(),
Builder.FieldOffsets.size());
}
generated by cgit v1.2.3-18-g5258 (git 2.32.0) at 2025-04-30 15:47:11 +0000