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1//===--- ExprConstShared.h - Shared consetxpr functionality ----*- C++ -*-===//2//3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.4// See https://llvm.org/LICENSE.txt for license information.5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception6//7//===----------------------------------------------------------------------===//8//9// Shared functionality between the new constant expression10// interpreter (AST/ByteCode/) and the current one (ExprConstant.cpp).11//12//===----------------------------------------------------------------------===//13 14#ifndef LLVM_CLANG_LIB_AST_EXPRCONSTSHARED_H15#define LLVM_CLANG_LIB_AST_EXPRCONSTSHARED_H16 17#include "clang/Basic/TypeTraits.h"18 19namespace llvm {20class APFloat;21}22namespace clang {23class QualType;24class LangOptions;25class ASTContext;26class CharUnits;27class Expr;28} // namespace clang29using namespace clang;30/// Values returned by __builtin_classify_type, chosen to match the values31/// produced by GCC's builtin.32enum class GCCTypeClass {33 None = -1,34 Void = 0,35 Integer = 1,36 // GCC reserves 2 for character types, but instead classifies them as37 // integers.38 Enum = 3,39 Bool = 4,40 Pointer = 5,41 // GCC reserves 6 for references, but appears to never use it (because42 // expressions never have reference type, presumably).43 PointerToDataMember = 7,44 RealFloat = 8,45 Complex = 9,46 // GCC reserves 10 for functions, but does not use it since GCC version 6 due47 // to decay to pointer. (Prior to version 6 it was only used in C++ mode).48 // GCC claims to reserve 11 for pointers to member functions, but *actually*49 // uses 12 for that purpose, same as for a class or struct. Maybe it50 // internally implements a pointer to member as a struct? Who knows.51 PointerToMemberFunction = 12, // Not a bug, see above.52 ClassOrStruct = 12,53 Union = 13,54 // GCC reserves 14 for arrays, but does not use it since GCC version 6 due to55 // decay to pointer. (Prior to version 6 it was only used in C++ mode).56 // GCC reserves 15 for strings, but actually uses 5 (pointer) for string57 // literals.58 // Lang = 16,59 // OpaqueType = 17,60 BitInt = 18,61 Vector = 1962};63 64GCCTypeClass EvaluateBuiltinClassifyType(QualType T,65 const LangOptions &LangOpts);66 67void HandleComplexComplexMul(llvm::APFloat A, llvm::APFloat B, llvm::APFloat C,68 llvm::APFloat D, llvm::APFloat &ResR,69 llvm::APFloat &ResI);70void HandleComplexComplexDiv(llvm::APFloat A, llvm::APFloat B, llvm::APFloat C,71 llvm::APFloat D, llvm::APFloat &ResR,72 llvm::APFloat &ResI);73 74CharUnits GetAlignOfExpr(const ASTContext &Ctx, const Expr *E,75 UnaryExprOrTypeTrait ExprKind);76 77#endif78