7f195b36ee
This adds support for initializing the vptr member of a dynamic class in the constructor of that class. This does not include support for lowering the `cir.vtable.address_point` operation to the LLVM dialect. That handling will be added in a follow-up patch.
46 lines
1.6 KiB
C++
46 lines
1.6 KiB
C++
//===----------------------------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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//
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// This contains code dealing with C++ code generation of virtual tables.
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//
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//===----------------------------------------------------------------------===//
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#include "CIRGenVTables.h"
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#include "CIRGenModule.h"
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#include "mlir/IR/Types.h"
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#include "clang/AST/VTableBuilder.h"
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#include "llvm/ADT/SmallVector.h"
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using namespace llvm;
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using namespace clang;
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using namespace clang::CIRGen;
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CIRGenVTables::CIRGenVTables(CIRGenModule &cgm)
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: cgm(cgm), vtContext(cgm.getASTContext().getVTableContext()) {}
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mlir::Type CIRGenModule::getVTableComponentType() {
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mlir::Type ptrTy = builder.getUInt8PtrTy();
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assert(!cir::MissingFeatures::vtableRelativeLayout());
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return ptrTy;
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}
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mlir::Type CIRGenVTables::getVTableComponentType() {
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return cgm.getVTableComponentType();
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}
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mlir::Type CIRGenVTables::getVTableType(const VTableLayout &layout) {
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SmallVector<mlir::Type, 4> tys;
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auto componentType = getVTableComponentType();
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for (unsigned i = 0, e = layout.getNumVTables(); i != e; ++i)
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tys.push_back(cir::ArrayType::get(componentType, layout.getVTableSize(i)));
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// FIXME(cir): should VTableLayout be encoded like we do for some
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// AST nodes?
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return cgm.getBuilder().getAnonRecordTy(tys, /*incomplete=*/false);
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}
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