| //===--- FunctionPointer.h - Types for the constexpr VM ---------*- C++ -*-===// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #ifndef LLVM_CLANG_AST_INTERP_FUNCTION_POINTER_H |
| #define LLVM_CLANG_AST_INTERP_FUNCTION_POINTER_H |
| |
| #include "Function.h" |
| #include "Primitives.h" |
| #include "clang/AST/APValue.h" |
| |
| namespace clang { |
| class ASTContext; |
| namespace interp { |
| |
| class FunctionPointer final { |
| private: |
| const Function *Func; |
| bool Valid; |
| |
| public: |
| FunctionPointer(const Function *Func) : Func(Func), Valid(true) { |
| assert(Func); |
| } |
| |
| FunctionPointer(uintptr_t IntVal = 0, const Descriptor *Desc = nullptr) |
| : Func(reinterpret_cast<const Function *>(IntVal)), Valid(false) {} |
| |
| const Function *getFunction() const { return Func; } |
| bool isZero() const { return !Func; } |
| bool isValid() const { return Valid; } |
| bool isWeak() const { |
| if (!Func || !Valid) |
| return false; |
| |
| return Func->getDecl()->isWeak(); |
| } |
| |
| APValue toAPValue() const { |
| if (!Func) |
| return APValue(static_cast<Expr *>(nullptr), CharUnits::Zero(), {}, |
| /*OnePastTheEnd=*/false, /*IsNull=*/true); |
| |
| if (!Valid) |
| return APValue(static_cast<Expr *>(nullptr), |
| CharUnits::fromQuantity(getIntegerRepresentation()), {}, |
| /*OnePastTheEnd=*/false, /*IsNull=*/false); |
| |
| return APValue(Func->getDecl(), CharUnits::Zero(), {}, |
| /*OnePastTheEnd=*/false, /*IsNull=*/false); |
| } |
| |
| void print(llvm::raw_ostream &OS) const { |
| OS << "FnPtr("; |
| if (Func && Valid) |
| OS << Func->getName(); |
| else if (Func) |
| OS << reinterpret_cast<uintptr_t>(Func); |
| else |
| OS << "nullptr"; |
| OS << ")"; |
| } |
| |
| std::string toDiagnosticString(const ASTContext &Ctx) const { |
| if (!Func) |
| return "nullptr"; |
| |
| return toAPValue().getAsString(Ctx, Func->getDecl()->getType()); |
| } |
| |
| uint64_t getIntegerRepresentation() const { |
| return static_cast<uint64_t>(reinterpret_cast<uintptr_t>(Func)); |
| } |
| |
| ComparisonCategoryResult compare(const FunctionPointer &RHS) const { |
| if (Func == RHS.Func) |
| return ComparisonCategoryResult::Equal; |
| return ComparisonCategoryResult::Unordered; |
| } |
| }; |
| |
| inline llvm::raw_ostream &operator<<(llvm::raw_ostream &OS, |
| FunctionPointer FP) { |
| FP.print(OS); |
| return OS; |
| } |
| |
| } // namespace interp |
| } // namespace clang |
| |
| #endif |