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//===--- PrimType.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
//
//===----------------------------------------------------------------------===//
//
// Defines the VM types and helpers operating on types.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_CLANG_AST_INTERP_TYPE_H
#define LLVM_CLANG_AST_INTERP_TYPE_H
#include "llvm/Support/raw_ostream.h"
#include <climits>
#include <cstddef>
#include <cstdint>
namespace clang {
namespace interp {
class Pointer;
class Boolean;
class Floating;
class FunctionPointer;
template <bool Signed> class IntegralAP;
template <unsigned Bits, bool Signed> class Integral;
/// Enumeration of the primitive types of the VM.
enum PrimType : unsigned {
PT_Sint8,
PT_Uint8,
PT_Sint16,
PT_Uint16,
PT_Sint32,
PT_Uint32,
PT_Sint64,
PT_Uint64,
PT_IntAP,
PT_IntAPS,
PT_Bool,
PT_Float,
PT_Ptr,
PT_FnPtr,
};
enum class CastKind : uint8_t {
Reinterpret,
};
inline llvm::raw_ostream &operator<<(llvm::raw_ostream &OS,
interp::CastKind CK) {
switch (CK) {
case interp::CastKind::Reinterpret:
OS << "reinterpret_cast";
break;
}
return OS;
}
constexpr bool isIntegralType(PrimType T) { return T <= PT_Bool; }
/// Mapping from primitive types to their representation.
template <PrimType T> struct PrimConv;
template <> struct PrimConv<PT_Sint8> { using T = Integral<8, true>; };
template <> struct PrimConv<PT_Uint8> { using T = Integral<8, false>; };
template <> struct PrimConv<PT_Sint16> { using T = Integral<16, true>; };
template <> struct PrimConv<PT_Uint16> { using T = Integral<16, false>; };
template <> struct PrimConv<PT_Sint32> { using T = Integral<32, true>; };
template <> struct PrimConv<PT_Uint32> { using T = Integral<32, false>; };
template <> struct PrimConv<PT_Sint64> { using T = Integral<64, true>; };
template <> struct PrimConv<PT_Uint64> { using T = Integral<64, false>; };
template <> struct PrimConv<PT_IntAP> {
using T = IntegralAP<false>;
};
template <> struct PrimConv<PT_IntAPS> {
using T = IntegralAP<true>;
};
template <> struct PrimConv<PT_Float> { using T = Floating; };
template <> struct PrimConv<PT_Bool> { using T = Boolean; };
template <> struct PrimConv<PT_Ptr> { using T = Pointer; };
template <> struct PrimConv<PT_FnPtr> {
using T = FunctionPointer;
};
/// Returns the size of a primitive type in bytes.
size_t primSize(PrimType Type);
/// Aligns a size to the pointer alignment.
constexpr size_t align(size_t Size) {
return ((Size + alignof(void *) - 1) / alignof(void *)) * alignof(void *);
}
constexpr bool aligned(uintptr_t Value) { return Value == align(Value); }
static_assert(aligned(sizeof(void *)));
static inline bool aligned(const void *P) {
return aligned(reinterpret_cast<uintptr_t>(P));
}
} // namespace interp
} // namespace clang
/// Helper macro to simplify type switches.
/// The macro implicitly exposes a type T in the scope of the inner block.
#define TYPE_SWITCH_CASE(Name, B) \
case Name: { using T = PrimConv<Name>::T; B; break; }
#define TYPE_SWITCH(Expr, B) \
do { \
switch (Expr) { \
TYPE_SWITCH_CASE(PT_Sint8, B) \
TYPE_SWITCH_CASE(PT_Uint8, B) \
TYPE_SWITCH_CASE(PT_Sint16, B) \
TYPE_SWITCH_CASE(PT_Uint16, B) \
TYPE_SWITCH_CASE(PT_Sint32, B) \
TYPE_SWITCH_CASE(PT_Uint32, B) \
TYPE_SWITCH_CASE(PT_Sint64, B) \
TYPE_SWITCH_CASE(PT_Uint64, B) \
TYPE_SWITCH_CASE(PT_IntAP, B) \
TYPE_SWITCH_CASE(PT_IntAPS, B) \
TYPE_SWITCH_CASE(PT_Float, B) \
TYPE_SWITCH_CASE(PT_Bool, B) \
TYPE_SWITCH_CASE(PT_Ptr, B) \
TYPE_SWITCH_CASE(PT_FnPtr, B) \
} \
} while (0)
#define INT_TYPE_SWITCH(Expr, B) \
do { \
switch (Expr) { \
TYPE_SWITCH_CASE(PT_Sint8, B) \
TYPE_SWITCH_CASE(PT_Uint8, B) \
TYPE_SWITCH_CASE(PT_Sint16, B) \
TYPE_SWITCH_CASE(PT_Uint16, B) \
TYPE_SWITCH_CASE(PT_Sint32, B) \
TYPE_SWITCH_CASE(PT_Uint32, B) \
TYPE_SWITCH_CASE(PT_Sint64, B) \
TYPE_SWITCH_CASE(PT_Uint64, B) \
TYPE_SWITCH_CASE(PT_IntAP, B) \
TYPE_SWITCH_CASE(PT_IntAPS, B) \
TYPE_SWITCH_CASE(PT_Bool, B) \
default: \
llvm_unreachable("Not an integer value"); \
} \
} while (0)
#define COMPOSITE_TYPE_SWITCH(Expr, B, D) \
do { \
switch (Expr) { \
TYPE_SWITCH_CASE(PT_Ptr, B) \
default: { D; break; } \
} \
} while (0)
#endif
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