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//===--- ExprConstShared.h - Shared consetxpr functionality ----*- 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
//
//===----------------------------------------------------------------------===//
//
// Shared functionality between the new constant expression
// interpreter (AST/ByteCode/) and the current one (ExprConstant.cpp).
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_CLANG_LIB_AST_EXPRCONSTSHARED_H
#define LLVM_CLANG_LIB_AST_EXPRCONSTSHARED_H
#include "clang/Basic/TypeTraits.h"
namespace llvm {
class APFloat;
}
namespace clang {
class QualType;
class LangOptions;
class ASTContext;
class CharUnits;
class Expr;
} // namespace clang
using namespace clang;
/// Values returned by __builtin_classify_type, chosen to match the values
/// produced by GCC's builtin.
enum class GCCTypeClass {
None = -1,
Void = 0,
Integer = 1,
// GCC reserves 2 for character types, but instead classifies them as
// integers.
Enum = 3,
Bool = 4,
Pointer = 5,
// GCC reserves 6 for references, but appears to never use it (because
// expressions never have reference type, presumably).
PointerToDataMember = 7,
RealFloat = 8,
Complex = 9,
// GCC reserves 10 for functions, but does not use it since GCC version 6 due
// to decay to pointer. (Prior to version 6 it was only used in C++ mode).
// GCC claims to reserve 11 for pointers to member functions, but *actually*
// uses 12 for that purpose, same as for a class or struct. Maybe it
// internally implements a pointer to member as a struct? Who knows.
PointerToMemberFunction = 12, // Not a bug, see above.
ClassOrStruct = 12,
Union = 13,
// GCC reserves 14 for arrays, but does not use it since GCC version 6 due to
// decay to pointer. (Prior to version 6 it was only used in C++ mode).
// GCC reserves 15 for strings, but actually uses 5 (pointer) for string
// literals.
// Lang = 16,
// OpaqueType = 17,
BitInt = 18,
Vector = 19
};
GCCTypeClass EvaluateBuiltinClassifyType(QualType T,
const LangOptions &LangOpts);
void HandleComplexComplexMul(llvm::APFloat A, llvm::APFloat B, llvm::APFloat C,
llvm::APFloat D, llvm::APFloat &ResR,
llvm::APFloat &ResI);
void HandleComplexComplexDiv(llvm::APFloat A, llvm::APFloat B, llvm::APFloat C,
llvm::APFloat D, llvm::APFloat &ResR,
llvm::APFloat &ResI);
CharUnits GetAlignOfExpr(const ASTContext &Ctx, const Expr *E,
UnaryExprOrTypeTrait ExprKind);
#endif
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