/// \brief Returns the size of type source info data block for the given type.
static unsigned getFullDataSizeForType(QualType Ty);
+ /// \brief Returns the alignment of type source info data block for
+ /// the given type.
+ static unsigned getLocalAlignmentForType(QualType Ty);
+
/// \brief Get the type for which this source info wrapper provides
/// information.
QualType getType() const {
}
UnqualTypeLoc getUnqualifiedLoc() const {
- return UnqualTypeLoc(getTypePtr(), Data);
+ unsigned align =
+ TypeLoc::getLocalAlignmentForType(QualType(getTypePtr(), 0));
+ uintptr_t dataInt = reinterpret_cast<uintptr_t>(Data);
+ dataInt = llvm::RoundUpToAlignment(dataInt, align);
+ return UnqualTypeLoc(getTypePtr(), reinterpret_cast<void*>(dataInt));
}
/// Initializes the local data of this type source info block to
return 0;
}
- /// \brief Returns the size of the type source info data block.
- unsigned getFullDataSize() const {
- return getLocalDataSize() +
- getFullDataSizeForType(getType().getLocalUnqualifiedType());
+ /// \brief Returns the alignment of the type source info data block that is
+ /// specific to this type.
+ unsigned getLocalDataAlignment() const {
+ // We don't preserve any location information.
+ return 1;
}
private:
/// \tparam LocalData the structure type of local location data for
/// this type
///
-/// sizeof(LocalData) needs to be a multiple of sizeof(void*) or
-/// else the world will end.
-///
/// TypeLocs with non-constant amounts of local data should override
/// getExtraLocalDataSize(); getExtraLocalData() will then point to
/// this extra memory.
}
public:
- unsigned getLocalDataSize() const {
- return sizeof(LocalData) + asDerived()->getExtraLocalDataSize();
+ unsigned getLocalDataAlignment() const {
+ return std::max(llvm::alignOf<LocalData>(),
+ asDerived()->getExtraLocalDataAlignment());
}
- // Give a default implementation that's useful for leaf types.
- unsigned getFullDataSize() const {
- return asDerived()->getLocalDataSize() + getInnerTypeSize();
+ unsigned getLocalDataSize() const {
+ unsigned size = sizeof(LocalData);
+ unsigned extraAlign = asDerived()->getExtraLocalDataAlignment();
+ size = llvm::RoundUpToAlignment(size, extraAlign);
+ size += asDerived()->getExtraLocalDataSize();
+ return size;
}
TypeLoc getNextTypeLoc() const {
return 0;
}
+ unsigned getExtraLocalDataAlignment() const {
+ return 1;
+ }
+
LocalData *getLocalData() const {
return static_cast<LocalData*>(Base::Data);
}
/// local data that can't be captured in the Info (e.g. because it's
/// of variable size).
void *getExtraLocalData() const {
- return getLocalData() + 1;
+ unsigned size = sizeof(LocalData);
+ unsigned extraAlign = asDerived()->getExtraLocalDataAlignment();
+ size = llvm::RoundUpToAlignment(size, extraAlign);
+ return reinterpret_cast<char*>(Base::Data) + size;
}
void *getNonLocalData() const {
- return static_cast<char*>(Base::Data) + asDerived()->getLocalDataSize();
+ uintptr_t data = reinterpret_cast<uintptr_t>(Base::Data);
+ data += asDerived()->getLocalDataSize();
+ data = llvm::RoundUpToAlignment(data, getNextTypeAlign());
+ return reinterpret_cast<void*>(data);
}
struct HasNoInnerType {};
return getInnerTypeLoc().getFullDataSize();
}
+ unsigned getNextTypeAlign() const {
+ return getNextTypeAlign(asDerived()->getInnerType());
+ }
+
+ unsigned getNextTypeAlign(HasNoInnerType _) const {
+ return 1;
+ }
+
+ unsigned getNextTypeAlign(QualType T) const {
+ return TypeLoc::getLocalAlignmentForType(T);
+ }
+
TypeLoc getNextTypeLoc(HasNoInnerType _) const {
return TypeLoc();
}
Type,
TypeSpecLocInfo> {
public:
- enum { LocalDataSize = sizeof(TypeSpecLocInfo) };
+ enum { LocalDataSize = sizeof(TypeSpecLocInfo),
+ LocalDataAlignment = llvm::AlignOf<TypeSpecLocInfo>::Alignment };
SourceLocation getNameLoc() const {
return this->getLocalData()->NameLoc;
BuiltinType,
BuiltinLocInfo> {
public:
- enum { LocalDataSize = sizeof(BuiltinLocInfo) };
-
SourceLocation getBuiltinLoc() const {
return getLocalData()->BuiltinLoc;
}
return needsExtraLocalData() ? sizeof(WrittenBuiltinSpecs) : 0;
}
+ unsigned getExtraLocalDataAlignment() const {
+ return needsExtraLocalData() ? llvm::alignOf<WrittenBuiltinSpecs>() : 1;
+ }
+
SourceRange getLocalSourceRange() const {
return SourceRange(getBuiltinLoc(), getBuiltinLoc());
}
return this->getNumProtocols() * sizeof(SourceLocation);
}
+ unsigned getExtraLocalDataAlignment() const {
+ return llvm::alignOf<SourceLocation>();
+ }
+
QualType getInnerType() const {
return getTypePtr()->getBaseType();
}
return getNumArgs() * sizeof(ParmVarDecl*);
}
+ unsigned getExtraLocalDataAlignment() const {
+ return llvm::alignOf<ParmVarDecl*>();
+ }
+
QualType getInnerType() const { return getTypePtr()->getResultType(); }
};
return getNumArgs() * sizeof(TemplateArgumentLocInfo);
}
+ unsigned getExtraLocalDataAlignment() const {
+ return llvm::alignOf<TemplateArgumentLocInfo>();
+ }
+
private:
TemplateArgumentLocInfo *getArgInfos() const {
return static_cast<TemplateArgumentLocInfo*>(getExtraLocalData());
return getNumArgs() * sizeof(TemplateArgumentLocInfo);
}
+ unsigned getExtraLocalDataAlignment() const {
+ return llvm::alignOf<TemplateArgumentLocInfo>();
+ }
+
private:
TemplateArgumentLocInfo *getArgInfos() const {
return static_cast<TemplateArgumentLocInfo*>(getExtraLocalData());
return TypeLocRanger().Visit(TL);
}
+namespace {
+ class TypeAligner : public TypeLocVisitor<TypeAligner, unsigned> {
+ public:
+#define ABSTRACT_TYPELOC(CLASS, PARENT)
+#define TYPELOC(CLASS, PARENT) \
+ unsigned Visit##CLASS##TypeLoc(CLASS##TypeLoc TyLoc) { \
+ return TyLoc.getLocalDataAlignment(); \
+ }
+#include "clang/AST/TypeLocNodes.def"
+ };
+}
+
+/// \brief Returns the alignment of the type source info data block.
+unsigned TypeLoc::getLocalAlignmentForType(QualType Ty) {
+ if (Ty.isNull()) return 1;
+ return TypeAligner().Visit(TypeLoc(Ty, 0));
+}
+
namespace {
class TypeSizer : public TypeLocVisitor<TypeSizer, unsigned> {
public:
#define ABSTRACT_TYPELOC(CLASS, PARENT)
#define TYPELOC(CLASS, PARENT) \
unsigned Visit##CLASS##TypeLoc(CLASS##TypeLoc TyLoc) { \
- return TyLoc.getFullDataSize(); \
+ return TyLoc.getLocalDataSize(); \
}
#include "clang/AST/TypeLocNodes.def"
};
/// \brief Returns the size of the type source info data block.
unsigned TypeLoc::getFullDataSizeForType(QualType Ty) {
- if (Ty.isNull()) return 0;
- return TypeSizer().Visit(TypeLoc(Ty, 0));
+ unsigned Total = 0;
+ TypeLoc TyLoc(Ty, 0);
+ unsigned MaxAlign = 1;
+ while (!TyLoc.isNull()) {
+ unsigned Align = getLocalAlignmentForType(TyLoc.getType());
+ MaxAlign = std::max(Align, MaxAlign);
+ Total = llvm::RoundUpToAlignment(Total, Align);
+ Total += TypeSizer().Visit(TyLoc);
+ TyLoc = TyLoc.getNextTypeLoc();
+ }
+ Total = llvm::RoundUpToAlignment(Total, MaxAlign);
+ return Total;
}
namespace {
SemaTemplateVariadic.cpp
SemaType.cpp
TargetAttributesSema.cpp
+ TypeLocBuilder.cpp
)
add_dependencies(clangSema
assert(!DeductType.isNull() && "can't build reference to auto");
TLB.push<ReferenceTypeLoc>(DeductType).setSigilLoc(Loc);
}
+ TypeSourceInfo *TSI = TLB.getTypeSourceInfo(Context, DeductType);
InitializationKind InitKind = InitializationKind::CreateDefault(Loc);
Expr *Init = InitExpr;
else
InitKind = InitializationKind::CreateCopy(Loc, Loc);
QualType DeducedType;
- if (DeduceAutoType(TLB.getTemporaryTypeLoc(DeductType),
- Init, DeducedType) == DAR_Failed) {
+ if (DeduceAutoType(TSI, Init, DeducedType) == DAR_Failed) {
if (isa<InitListExpr>(Init))
Diag(Loc, diag::err_init_capture_deduction_failure_from_init_list)
<< Id << Init->getSourceRange();
// the closure type. This member is not a bit-field and not mutable.
// Core issue: the member is (probably...) public.
FieldDecl *NewFD = CheckFieldDecl(
- Id, DeducedType, TLB.getTypeSourceInfo(Context, DeductType), LSI->Lambda,
+ Id, DeducedType, TSI, LSI->Lambda,
Loc, /*Mutable*/ false, /*BitWidth*/ 0, ICIS_NoInit,
Loc, AS_public, /*PrevDecl*/ 0, /*Declarator*/ 0);
LSI->Lambda->addDecl(NewFD);
#include "clang/Sema/ScopeInfo.h"
#include "clang/Sema/SemaInternal.h"
#include "clang/Sema/Template.h"
+#include "TypeLocBuilder.h"
using namespace clang;
EllipsisLoc, NumExpansions);
if (Result.isNull())
return 0;
-
- TypeSourceInfo *TSResult = Context.CreateTypeSourceInfo(Result);
- PackExpansionTypeLoc TL =
- TSResult->getTypeLoc().castAs<PackExpansionTypeLoc>();
+
+ TypeLocBuilder TLB;
+ TLB.pushFullCopy(Pattern->getTypeLoc());
+ PackExpansionTypeLoc TL = TLB.push<PackExpansionTypeLoc>(Result);
TL.setEllipsisLoc(EllipsisLoc);
-
- // Copy over the source-location information from the type.
- memcpy(TL.getNextTypeLoc().getOpaqueData(),
- Pattern->getTypeLoc().getOpaqueData(),
- Pattern->getTypeLoc().getFullDataSize());
- return TSResult;
+
+ return TLB.getTypeSourceInfo(Context, Result);
}
QualType Sema::CheckPackExpansion(QualType Pattern, SourceRange PatternRange,
} else {
// Otherwise, complain about the addition of a qualifier to an
// already-qualified type.
- SourceRange R = TLB.getTemporaryTypeLoc(Result).getSourceRange();
+ SourceRange R = T.getUnqualifiedLoc().getSourceRange();
SemaRef.Diag(R.getBegin(), diag::err_attr_objc_ownership_redundant)
<< Result << R;
--- /dev/null
+//===--- TypeLocBuilder.cpp - Type Source Info collector ------------------===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This files defines TypeLocBuilder, a class for building TypeLocs
+// bottom-up.
+//
+//===----------------------------------------------------------------------===//
+
+#include "TypeLocBuilder.h"
+
+using namespace clang;
+
+void TypeLocBuilder::pushFullCopy(TypeLoc L) {
+ size_t Size = L.getFullDataSize();
+ reserve(Size);
+
+ SmallVector<TypeLoc, 4> TypeLocs;
+ TypeLoc CurTL = L;
+ while (CurTL) {
+ TypeLocs.push_back(CurTL);
+ CurTL = CurTL.getNextTypeLoc();
+ }
+
+ for (unsigned i = 0, e = TypeLocs.size(); i < e; ++i) {
+ TypeLoc CurTL = TypeLocs[e-i-1];
+ switch (CurTL.getTypeLocClass()) {
+#define ABSTRACT_TYPELOC(CLASS, PARENT)
+#define TYPELOC(CLASS, PARENT) \
+ case TypeLoc::CLASS: { \
+ CLASS##TypeLoc NewTL = push<class CLASS##TypeLoc>(CurTL.getType()); \
+ memcpy(NewTL.getOpaqueData(), CurTL.getOpaqueData(), NewTL.getLocalDataSize()); \
+ break; \
+ }
+#include "clang/AST/TypeLocNodes.def"
+ }
+ }
+}
+
+void TypeLocBuilder::grow(size_t NewCapacity) {
+ assert(NewCapacity > Capacity);
+
+ // Allocate the new buffer and copy the old data into it.
+ char *NewBuffer = new char[NewCapacity];
+ unsigned NewIndex = Index + NewCapacity - Capacity;
+ memcpy(&NewBuffer[NewIndex],
+ &Buffer[Index],
+ Capacity - Index);
+
+ if (Buffer != InlineBuffer.buffer)
+ delete[] Buffer;
+
+ Buffer = NewBuffer;
+ Capacity = NewCapacity;
+ Index = NewIndex;
+}
+
+TypeLoc TypeLocBuilder::pushImpl(QualType T, size_t LocalSize, unsigned LocalAlignment) {
+#ifndef NDEBUG
+ QualType TLast = TypeLoc(T, 0).getNextTypeLoc().getType();
+ assert(TLast == LastTy &&
+ "mismatch between last type and new type's inner type");
+ LastTy = T;
+#endif
+
+ assert(LocalAlignment <= BufferMaxAlignment && "Unexpected alignment");
+
+ // If we need to grow, grow by a factor of 2.
+ if (LocalSize > Index) {
+ size_t RequiredCapacity = Capacity + (LocalSize - Index);
+ size_t NewCapacity = Capacity * 2;
+ while (RequiredCapacity > NewCapacity)
+ NewCapacity *= 2;
+ grow(NewCapacity);
+ }
+
+ // Because we're adding elements to the TypeLoc backwards, we have to
+ // do some extra work to keep everything aligned appropriately.
+ // FIXME: This algorithm is a absolute mess because every TypeLoc returned
+ // needs to be valid. Partial TypeLocs are a terrible idea.
+ // FIXME: 4 and 8 are sufficient at the moment, but it's pretty ugly to
+ // hardcode them.
+ if (LocalAlignment == 4) {
+ if (NumBytesAtAlign8 == 0) {
+ NumBytesAtAlign4 += LocalSize;
+ } else {
+ unsigned Padding = NumBytesAtAlign4 % 8;
+ if (Padding == 0) {
+ if (LocalSize % 8 == 0) {
+ // Everything is set: there's no padding and we don't need to add
+ // any.
+ } else {
+ assert(LocalSize % 8 == 4);
+ // No existing padding; add in 4 bytes padding
+ memmove(&Buffer[Index - 4], &Buffer[Index], NumBytesAtAlign4);
+ Index -= 4;
+ }
+ } else {
+ assert(Padding == 4);
+ if (LocalSize % 8 == 0) {
+ // Everything is set: there's 4 bytes padding and we don't need
+ // to add any.
+ } else {
+ assert(LocalSize % 8 == 4);
+ // There are 4 bytes padding, but we don't need any; remove it.
+ memmove(&Buffer[Index + 4], &Buffer[Index], NumBytesAtAlign4);
+ Index += 4;
+ }
+ }
+ NumBytesAtAlign4 += LocalSize;
+ }
+ } else if (LocalAlignment == 8) {
+ if (!NumBytesAtAlign8 && NumBytesAtAlign4 % 8 != 0) {
+ // No existing padding and misaligned members; add in 4 bytes padding
+ memmove(&Buffer[Index - 4], &Buffer[Index], NumBytesAtAlign4);
+ Index -= 4;
+ }
+ // Forget about any padding.
+ NumBytesAtAlign4 = 0;
+ NumBytesAtAlign8 += LocalSize;
+ } else {
+ assert(LocalSize == 0);
+ }
+
+ Index -= LocalSize;
+
+ assert(Capacity - Index == TypeLoc::getFullDataSizeForType(T) &&
+ "incorrect data size provided to CreateTypeSourceInfo!");
+
+ return getTemporaryTypeLoc(T);
+}
#endif
/// The inline buffer.
- char InlineBuffer[InlineCapacity];
+ enum { BufferMaxAlignment = llvm::AlignOf<void*>::Alignment };
+ llvm::AlignedCharArray<BufferMaxAlignment, InlineCapacity> InlineBuffer;
+ unsigned NumBytesAtAlign4, NumBytesAtAlign8;
public:
TypeLocBuilder()
- : Buffer(InlineBuffer), Capacity(InlineCapacity), Index(InlineCapacity) {}
+ : Buffer(InlineBuffer.buffer), Capacity(InlineCapacity),
+ Index(InlineCapacity), NumBytesAtAlign4(0), NumBytesAtAlign8(0)
+ {
+ }
~TypeLocBuilder() {
- if (Buffer != InlineBuffer)
+ if (Buffer != InlineBuffer.buffer)
delete[] Buffer;
}
/// Pushes a copy of the given TypeLoc onto this builder. The builder
/// must be empty for this to work.
- void pushFullCopy(TypeLoc L) {
- size_t Size = L.getFullDataSize();
- TypeLoc Copy = pushFullUninitializedImpl(L.getType(), Size);
- memcpy(Copy.getOpaqueData(), L.getOpaqueData(), Size);
- }
-
- /// Pushes uninitialized space for the given type. The builder must
- /// be empty.
- TypeLoc pushFullUninitialized(QualType T) {
- return pushFullUninitializedImpl(T, TypeLoc::getFullDataSizeForType(T));
- }
+ void pushFullCopy(TypeLoc L);
/// Pushes space for a typespec TypeLoc. Invalidates any TypeLocs
/// previously retrieved from this builder.
TypeSpecTypeLoc pushTypeSpec(QualType T) {
size_t LocalSize = TypeSpecTypeLoc::LocalDataSize;
- return pushImpl(T, LocalSize).castAs<TypeSpecTypeLoc>();
+ unsigned LocalAlign = TypeSpecTypeLoc::LocalDataAlignment;
+ return pushImpl(T, LocalSize, LocalAlign).castAs<TypeSpecTypeLoc>();
}
/// Resets this builder to the newly-initialized state.
LastTy = QualType();
#endif
Index = Capacity;
+ NumBytesAtAlign4 = NumBytesAtAlign8 = 0;
}
/// \brief Tell the TypeLocBuilder that the type it is storing has been
/// Pushes space for a new TypeLoc of the given type. Invalidates
/// any TypeLocs previously retrieved from this builder.
template <class TyLocType> TyLocType push(QualType T) {
- size_t LocalSize = TypeLoc(T, 0).castAs<TyLocType>().getLocalDataSize();
- return pushImpl(T, LocalSize).castAs<TyLocType>();
+ TyLocType Loc = TypeLoc(T, 0).castAs<TyLocType>();
+ size_t LocalSize = Loc.getLocalDataSize();
+ unsigned LocalAlign = Loc.getLocalDataAlignment();
+ return pushImpl(T, LocalSize, LocalAlign).castAs<TyLocType>();
}
/// Creates a TypeSourceInfo for the given type.
}
private:
- TypeLoc pushImpl(QualType T, size_t LocalSize) {
-#ifndef NDEBUG
- QualType TLast = TypeLoc(T, 0).getNextTypeLoc().getType();
- assert(TLast == LastTy &&
- "mismatch between last type and new type's inner type");
- LastTy = T;
-#endif
-
- // If we need to grow, grow by a factor of 2.
- if (LocalSize > Index) {
- size_t RequiredCapacity = Capacity + (LocalSize - Index);
- size_t NewCapacity = Capacity * 2;
- while (RequiredCapacity > NewCapacity)
- NewCapacity *= 2;
- grow(NewCapacity);
- }
- Index -= LocalSize;
-
- return getTemporaryTypeLoc(T);
- }
+ TypeLoc pushImpl(QualType T, size_t LocalSize, unsigned LocalAlignment);
/// Grow to the given capacity.
- void grow(size_t NewCapacity) {
- assert(NewCapacity > Capacity);
-
- // Allocate the new buffer and copy the old data into it.
- char *NewBuffer = new char[NewCapacity];
- unsigned NewIndex = Index + NewCapacity - Capacity;
- memcpy(&NewBuffer[NewIndex],
- &Buffer[Index],
- Capacity - Index);
-
- if (Buffer != InlineBuffer)
- delete[] Buffer;
-
- Buffer = NewBuffer;
- Capacity = NewCapacity;
- Index = NewIndex;
- }
-
- TypeLoc pushFullUninitializedImpl(QualType T, size_t Size) {
-#ifndef NDEBUG
- assert(LastTy.isNull() && "pushing full on non-empty TypeLocBuilder");
- LastTy = T;
-#endif
- assert(Index == Capacity && "pushing full on non-empty TypeLocBuilder");
-
- reserve(Size);
- Index -= Size;
-
- return getTemporaryTypeLoc(T);
- }
+ void grow(size_t NewCapacity);
-public:
/// \brief Retrieve a temporary TypeLoc that refers into this \c TypeLocBuilder
/// object.
///
projects / clang / commitdiff