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//===-- RecordLayout.cpp - Layout information for a struct/union -*- C++ -*-==//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file defines the RecordLayout interface.
//
//===----------------------------------------------------------------------===//
#include "clang/AST/ASTContext.h"
#include "clang/AST/RecordLayout.h"
#include "clang/Basic/TargetInfo.h"
using namespace clang;
void ASTRecordLayout::Destroy(ASTContext &Ctx) {
if (FieldOffsets)
Ctx.Deallocate(FieldOffsets);
if (CXXInfo) {
Ctx.Deallocate(CXXInfo);
CXXInfo->~CXXRecordLayoutInfo();
}
this->~ASTRecordLayout();
Ctx.Deallocate(this);
}
ASTRecordLayout::ASTRecordLayout(const ASTContext &Ctx, CharUnits size,
CharUnits alignment, CharUnits datasize,
const uint64_t *fieldoffsets,
unsigned fieldcount)
: Size(size), DataSize(datasize), FieldOffsets(0), Alignment(alignment),
FieldCount(fieldcount), CXXInfo(0) {
if (FieldCount > 0) {
FieldOffsets = new (Ctx) uint64_t[FieldCount];
memcpy(FieldOffsets, fieldoffsets, FieldCount * sizeof(*FieldOffsets));
}
}
// Constructor for C++ records.
ASTRecordLayout::ASTRecordLayout(const ASTContext &Ctx,
CharUnits size, CharUnits alignment,
CharUnits vfptroffset, CharUnits vbptroffset,
CharUnits datasize,
const uint64_t *fieldoffsets,
unsigned fieldcount,
CharUnits nonvirtualsize,
CharUnits nonvirtualalign,
CharUnits SizeOfLargestEmptySubobject,
const CXXRecordDecl *PrimaryBase,
bool IsPrimaryBaseVirtual,
const BaseOffsetsMapTy& BaseOffsets,
const BaseOffsetsMapTy& VBaseOffsets)
: Size(size), DataSize(datasize), FieldOffsets(0), Alignment(alignment),
FieldCount(fieldcount), CXXInfo(new (Ctx) CXXRecordLayoutInfo)
{
if (FieldCount > 0) {
FieldOffsets = new (Ctx) uint64_t[FieldCount];
memcpy(FieldOffsets, fieldoffsets, FieldCount * sizeof(*FieldOffsets));
}
CXXInfo->PrimaryBase.setPointer(PrimaryBase);
CXXInfo->PrimaryBase.setInt(IsPrimaryBaseVirtual);
CXXInfo->NonVirtualSize = nonvirtualsize;
CXXInfo->NonVirtualAlign = nonvirtualalign;
CXXInfo->SizeOfLargestEmptySubobject = SizeOfLargestEmptySubobject;
CXXInfo->BaseOffsets = BaseOffsets;
CXXInfo->VBaseOffsets = VBaseOffsets;
CXXInfo->VFPtrOffset = vfptroffset;
CXXInfo->VBPtrOffset = vbptroffset;
#ifndef NDEBUG
if (const CXXRecordDecl *PrimaryBase = getPrimaryBase()) {
if (isPrimaryBaseVirtual()) {
// Microsoft ABI doesn't have primary virtual base
if (Ctx.getTargetInfo().getCXXABI() != CXXABI_Microsoft) {
assert(getVBaseClassOffset(PrimaryBase).isZero() &&
"Primary virtual base must be at offset 0!");
}
} else {
assert(getBaseClassOffsetInBits(PrimaryBase) == 0 &&
"Primary base must be at offset 0!");
}
}
#endif
}
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