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db94852b9b
Convert them to Pointers, do the offset calculation and then convert them back to function pointers.
77 lines
2.1 KiB
C++
77 lines
2.1 KiB
C++
//===--- FunctionPointer.h - Types for the constexpr VM ---------*- 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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#ifndef LLVM_CLANG_AST_INTERP_FUNCTION_POINTER_H
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#define LLVM_CLANG_AST_INTERP_FUNCTION_POINTER_H
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#include "Function.h"
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#include "Primitives.h"
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namespace clang {
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class ASTContext;
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class APValue;
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namespace interp {
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class FunctionPointer final {
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private:
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const Function *Func;
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uint64_t Offset;
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bool Valid;
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public:
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FunctionPointer() = default;
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FunctionPointer(const Function *Func, uint64_t Offset = 0)
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: Func(Func), Offset(Offset), Valid(true) {}
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FunctionPointer(uintptr_t IntVal, const Descriptor *Desc = nullptr)
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: Func(reinterpret_cast<const Function *>(IntVal)), Offset(0),
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Valid(false) {}
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const Function *getFunction() const { return Func; }
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uint64_t getOffset() const { return Offset; }
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bool isZero() const { return !Func; }
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bool isValid() const { return Valid; }
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bool isWeak() const {
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if (!Func || !Valid || !Func->getDecl())
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return false;
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return Func->getDecl()->isWeak();
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}
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APValue toAPValue(const ASTContext &) const;
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void print(llvm::raw_ostream &OS) const;
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std::string toDiagnosticString(const ASTContext &Ctx) const {
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if (!Func)
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return "nullptr";
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return toAPValue(Ctx).getAsString(Ctx, Func->getDecl()->getType());
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}
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uint64_t getIntegerRepresentation() const {
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return static_cast<uint64_t>(reinterpret_cast<uintptr_t>(Func));
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}
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ComparisonCategoryResult compare(const FunctionPointer &RHS) const {
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if (Func == RHS.Func && Offset == RHS.Offset)
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return ComparisonCategoryResult::Equal;
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return ComparisonCategoryResult::Unordered;
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}
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};
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inline llvm::raw_ostream &operator<<(llvm::raw_ostream &OS,
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FunctionPointer FP) {
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FP.print(OS);
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return OS;
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}
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} // namespace interp
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} // namespace clang
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#endif
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