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Move VTableComponent to header file 

llvm-svn: 140505
This commit is contained in:
Peter Collingbourne 2011-09-26 01:56:45 +00:00
parent 5ee9ee490e
commit cd3c3f4f3d
2 changed files with 167 additions and 167 deletions
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167
clang/lib/CodeGen/CGVTables.cpp
View File

@ -441,173 +441,6 @@ void FinalOverriders::dump(raw_ostream &Out, BaseSubobject Base,
}
}
/// VTableComponent - Represents a single component in a vtable.
class VTableComponent {
public:
enum Kind {
CK_VCallOffset,
CK_VBaseOffset,
CK_OffsetToTop,
CK_RTTI,
CK_FunctionPointer,
/// CK_CompleteDtorPointer - A pointer to the complete destructor.
CK_CompleteDtorPointer,
/// CK_DeletingDtorPointer - A pointer to the deleting destructor.
CK_DeletingDtorPointer,
/// CK_UnusedFunctionPointer - In some cases, a vtable function pointer
/// will end up never being called. Such vtable function pointers are
/// represented as a CK_UnusedFunctionPointer.
CK_UnusedFunctionPointer
};
static VTableComponent MakeVCallOffset(CharUnits Offset) {
return VTableComponent(CK_VCallOffset, Offset);
}
static VTableComponent MakeVBaseOffset(CharUnits Offset) {
return VTableComponent(CK_VBaseOffset, Offset);
}
static VTableComponent MakeOffsetToTop(CharUnits Offset) {
return VTableComponent(CK_OffsetToTop, Offset);
}
static VTableComponent MakeRTTI(const CXXRecordDecl *RD) {
return VTableComponent(CK_RTTI, reinterpret_cast<uintptr_t>(RD));
}
static VTableComponent MakeFunction(const CXXMethodDecl *MD) {
assert(!isa<CXXDestructorDecl>(MD) &&
"Don't use MakeFunction with destructors!");
return VTableComponent(CK_FunctionPointer,
reinterpret_cast<uintptr_t>(MD));
}
static VTableComponent MakeCompleteDtor(const CXXDestructorDecl *DD) {
return VTableComponent(CK_CompleteDtorPointer,
reinterpret_cast<uintptr_t>(DD));
}
static VTableComponent MakeDeletingDtor(const CXXDestructorDecl *DD) {
return VTableComponent(CK_DeletingDtorPointer,
reinterpret_cast<uintptr_t>(DD));
}
static VTableComponent MakeUnusedFunction(const CXXMethodDecl *MD) {
assert(!isa<CXXDestructorDecl>(MD) &&
"Don't use MakeUnusedFunction with destructors!");
return VTableComponent(CK_UnusedFunctionPointer,
reinterpret_cast<uintptr_t>(MD));
}
static VTableComponent getFromOpaqueInteger(uint64_t I) {
return VTableComponent(I);
}
/// getKind - Get the kind of this vtable component.
Kind getKind() const {
return (Kind)(Value & 0x7);
}
CharUnits getVCallOffset() const {
assert(getKind() == CK_VCallOffset && "Invalid component kind!");
return getOffset();
}
CharUnits getVBaseOffset() const {
assert(getKind() == CK_VBaseOffset && "Invalid component kind!");
return getOffset();
}
CharUnits getOffsetToTop() const {
assert(getKind() == CK_OffsetToTop && "Invalid component kind!");
return getOffset();
}
const CXXRecordDecl *getRTTIDecl() const {
assert(getKind() == CK_RTTI && "Invalid component kind!");
return reinterpret_cast<CXXRecordDecl *>(getPointer());
}
const CXXMethodDecl *getFunctionDecl() const {
assert(getKind() == CK_FunctionPointer);
return reinterpret_cast<CXXMethodDecl *>(getPointer());
}
const CXXDestructorDecl *getDestructorDecl() const {
assert((getKind() == CK_CompleteDtorPointer ||
getKind() == CK_DeletingDtorPointer) && "Invalid component kind!");
return reinterpret_cast<CXXDestructorDecl *>(getPointer());
}
const CXXMethodDecl *getUnusedFunctionDecl() const {
assert(getKind() == CK_UnusedFunctionPointer);
return reinterpret_cast<CXXMethodDecl *>(getPointer());
}
private:
VTableComponent(Kind ComponentKind, CharUnits Offset) {
assert((ComponentKind == CK_VCallOffset ||
ComponentKind == CK_VBaseOffset ||
ComponentKind == CK_OffsetToTop) && "Invalid component kind!");
assert(Offset.getQuantity() <= ((1LL << 56) - 1) && "Offset is too big!");
Value = ((Offset.getQuantity() << 3) | ComponentKind);
}
VTableComponent(Kind ComponentKind, uintptr_t Ptr) {
assert((ComponentKind == CK_RTTI ||
ComponentKind == CK_FunctionPointer ||
ComponentKind == CK_CompleteDtorPointer ||
ComponentKind == CK_DeletingDtorPointer ||
ComponentKind == CK_UnusedFunctionPointer) &&
"Invalid component kind!");
assert((Ptr & 7) == 0 && "Pointer not sufficiently aligned!");
Value = Ptr | ComponentKind;
}
CharUnits getOffset() const {
assert((getKind() == CK_VCallOffset || getKind() == CK_VBaseOffset ||
getKind() == CK_OffsetToTop) && "Invalid component kind!");
return CharUnits::fromQuantity(Value >> 3);
}
uintptr_t getPointer() const {
assert((getKind() == CK_RTTI ||
getKind() == CK_FunctionPointer ||
getKind() == CK_CompleteDtorPointer ||
getKind() == CK_DeletingDtorPointer ||
getKind() == CK_UnusedFunctionPointer) &&
"Invalid component kind!");
return static_cast<uintptr_t>(Value & ~7ULL);
}
explicit VTableComponent(uint64_t Value)
: Value(Value) { }
/// The kind is stored in the lower 3 bits of the value. For offsets, we
/// make use of the facts that classes can't be larger than 2^55 bytes,
/// so we store the offset in the lower part of the 61 bytes that remain.
/// (The reason that we're not simply using a PointerIntPair here is that we
/// need the offsets to be 64-bit, even when on a 32-bit machine).
int64_t Value;
};
/// VCallOffsetMap - Keeps track of vcall offsets when building a vtable.
struct VCallOffsetMap {

167
clang/lib/CodeGen/CGVTables.h
View File

@ -27,6 +27,173 @@ namespace clang {
namespace CodeGen {
class CodeGenModule;
/// VTableComponent - Represents a single component in a vtable.
class VTableComponent {
public:
enum Kind {
CK_VCallOffset,
CK_VBaseOffset,
CK_OffsetToTop,
CK_RTTI,
CK_FunctionPointer,
/// CK_CompleteDtorPointer - A pointer to the complete destructor.
CK_CompleteDtorPointer,
/// CK_DeletingDtorPointer - A pointer to the deleting destructor.
CK_DeletingDtorPointer,
/// CK_UnusedFunctionPointer - In some cases, a vtable function pointer
/// will end up never being called. Such vtable function pointers are
/// represented as a CK_UnusedFunctionPointer.
CK_UnusedFunctionPointer
};
static VTableComponent MakeVCallOffset(CharUnits Offset) {
return VTableComponent(CK_VCallOffset, Offset);
}
static VTableComponent MakeVBaseOffset(CharUnits Offset) {
return VTableComponent(CK_VBaseOffset, Offset);
}
static VTableComponent MakeOffsetToTop(CharUnits Offset) {
return VTableComponent(CK_OffsetToTop, Offset);
}
static VTableComponent MakeRTTI(const CXXRecordDecl *RD) {
return VTableComponent(CK_RTTI, reinterpret_cast<uintptr_t>(RD));
}
static VTableComponent MakeFunction(const CXXMethodDecl *MD) {
assert(!isa<CXXDestructorDecl>(MD) &&
"Don't use MakeFunction with destructors!");
return VTableComponent(CK_FunctionPointer,
reinterpret_cast<uintptr_t>(MD));
}
static VTableComponent MakeCompleteDtor(const CXXDestructorDecl *DD) {
return VTableComponent(CK_CompleteDtorPointer,
reinterpret_cast<uintptr_t>(DD));
}
static VTableComponent MakeDeletingDtor(const CXXDestructorDecl *DD) {
return VTableComponent(CK_DeletingDtorPointer,
reinterpret_cast<uintptr_t>(DD));
}
static VTableComponent MakeUnusedFunction(const CXXMethodDecl *MD) {
assert(!isa<CXXDestructorDecl>(MD) &&
"Don't use MakeUnusedFunction with destructors!");
return VTableComponent(CK_UnusedFunctionPointer,
reinterpret_cast<uintptr_t>(MD));
}
static VTableComponent getFromOpaqueInteger(uint64_t I) {
return VTableComponent(I);
}
/// getKind - Get the kind of this vtable component.
Kind getKind() const {
return (Kind)(Value & 0x7);
}
CharUnits getVCallOffset() const {
assert(getKind() == CK_VCallOffset && "Invalid component kind!");
return getOffset();
}
CharUnits getVBaseOffset() const {
assert(getKind() == CK_VBaseOffset && "Invalid component kind!");
return getOffset();
}
CharUnits getOffsetToTop() const {
assert(getKind() == CK_OffsetToTop && "Invalid component kind!");
return getOffset();
}
const CXXRecordDecl *getRTTIDecl() const {
assert(getKind() == CK_RTTI && "Invalid component kind!");
return reinterpret_cast<CXXRecordDecl *>(getPointer());
}
const CXXMethodDecl *getFunctionDecl() const {
assert(getKind() == CK_FunctionPointer);
return reinterpret_cast<CXXMethodDecl *>(getPointer());
}
const CXXDestructorDecl *getDestructorDecl() const {
assert((getKind() == CK_CompleteDtorPointer ||
getKind() == CK_DeletingDtorPointer) && "Invalid component kind!");
return reinterpret_cast<CXXDestructorDecl *>(getPointer());
}
const CXXMethodDecl *getUnusedFunctionDecl() const {
assert(getKind() == CK_UnusedFunctionPointer);
return reinterpret_cast<CXXMethodDecl *>(getPointer());
}
private:
VTableComponent(Kind ComponentKind, CharUnits Offset) {
assert((ComponentKind == CK_VCallOffset ||
ComponentKind == CK_VBaseOffset ||
ComponentKind == CK_OffsetToTop) && "Invalid component kind!");
assert(Offset.getQuantity() <= ((1LL << 56) - 1) && "Offset is too big!");
Value = ((Offset.getQuantity() << 3) | ComponentKind);
}
VTableComponent(Kind ComponentKind, uintptr_t Ptr) {
assert((ComponentKind == CK_RTTI ||
ComponentKind == CK_FunctionPointer ||
ComponentKind == CK_CompleteDtorPointer ||
ComponentKind == CK_DeletingDtorPointer ||
ComponentKind == CK_UnusedFunctionPointer) &&
"Invalid component kind!");
assert((Ptr & 7) == 0 && "Pointer not sufficiently aligned!");
Value = Ptr | ComponentKind;
}
CharUnits getOffset() const {
assert((getKind() == CK_VCallOffset || getKind() == CK_VBaseOffset ||
getKind() == CK_OffsetToTop) && "Invalid component kind!");
return CharUnits::fromQuantity(Value >> 3);
}
uintptr_t getPointer() const {
assert((getKind() == CK_RTTI ||
getKind() == CK_FunctionPointer ||
getKind() == CK_CompleteDtorPointer ||
getKind() == CK_DeletingDtorPointer ||
getKind() == CK_UnusedFunctionPointer) &&
"Invalid component kind!");
return static_cast<uintptr_t>(Value & ~7ULL);
}
explicit VTableComponent(uint64_t Value)
: Value(Value) { }
/// The kind is stored in the lower 3 bits of the value. For offsets, we
/// make use of the facts that classes can't be larger than 2^55 bytes,
/// so we store the offset in the lower part of the 61 bytes that remain.
/// (The reason that we're not simply using a PointerIntPair here is that we
/// need the offsets to be 64-bit, even when on a 32-bit machine).
int64_t Value;
};
class VTableContext {
ASTContext &Context;