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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 <climits>
#include <cstddef>
#include <cstdint>
#include "Boolean.h"
#include "Integral.h"
#include "Pointer.h"
namespace clang {
namespace interp {
/// 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_Bool,
PT_Ptr,
};
/// 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_Bool> { using T = Boolean; };
template <> struct PrimConv<PT_Ptr> { using T = Pointer; };
/// 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 *);
}
inline bool isPrimitiveIntegral(PrimType Type) {
switch (Type) {
case PT_Bool:
case PT_Sint8:
case PT_Uint8:
case PT_Sint16:
case PT_Uint16:
case PT_Sint32:
case PT_Uint32:
case PT_Sint64:
case PT_Uint64:
return true;
default:
return false;
}
}
} // 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; do {B;} while(0); break; }
#define TYPE_SWITCH(Expr, B) \
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_Bool, B) \
TYPE_SWITCH_CASE(PT_Ptr, B) \
}
#define COMPOSITE_TYPE_SWITCH(Expr, B, D) \
switch (Expr) { \
TYPE_SWITCH_CASE(PT_Ptr, B) \
default: do { D; } while(0); break; \
}
#define INT_TYPE_SWITCH(Expr, B) \
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) \
default: llvm_unreachable("not an integer"); \
}
#endif
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