60 lines
2.0 KiB
C++
60 lines
2.0 KiB
C++
//===--- CGVtable.h - Emit LLVM Code for C++ vtables ----------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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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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#ifndef CLANG_CODEGEN_CGVTABLE_H
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#define CLANG_CODEGEN_CGVTABLE_H
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#include "llvm/ADT/DenseMap.h"
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namespace clang {
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class CXXMethodDecl;
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class CXXRecordDecl;
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namespace CodeGen {
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class CodeGenModule;
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class CGVtableInfo {
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CodeGenModule &CGM;
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/// MethodVtableIndices - Contains the index (relative to the vtable address
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/// point) where the function pointer for a virtual function is stored.
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typedef llvm::DenseMap<const CXXMethodDecl *, int64_t> MethodVtableIndicesTy;
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MethodVtableIndicesTy MethodVtableIndices;
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typedef std::pair<const CXXRecordDecl *,
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const CXXRecordDecl *> ClassPairTy;
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/// VirtualBaseClassIndicies - Contains the index into the vtable where the
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/// offsets for virtual bases of a class are stored.
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typedef llvm::DenseMap<ClassPairTy, int64_t> VirtualBaseClassIndiciesTy;
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VirtualBaseClassIndiciesTy VirtualBaseClassIndicies;
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public:
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CGVtableInfo(CodeGenModule &CGM)
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: CGM(CGM) { }
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/// getMethodVtableIndex - Return the index (relative to the vtable address
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/// point) where the function pointer for the given virtual function is
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/// stored.
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int64_t getMethodVtableIndex(const CXXMethodDecl *MD);
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/// getVirtualBaseOffsetIndex - Return the index (relative to the vtable address
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/// point) where the offset of the given virtual base of the given class is
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// stored.
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int64_t getVirtualBaseOffsetIndex(const CXXRecordDecl *RD,
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const CXXRecordDecl *VBase);
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};
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}
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}
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#endif
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