1//===- Types.cpp - Helper for the selection of C++ data types. ------------===//
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-exception
6//
7//===----------------------------------------------------------------------===//
8
9#include "Types.h"
10
11// For LLVM_ATTRIBUTE_UNUSED
12#include "llvm/Support/Compiler.h"
13
14#include <cassert>
15
16using namespace llvm;
17
18const char *
19llvm::getMinimalTypeForRange(uint64_t Range,
20 unsigned MaxSize LLVM_ATTRIBUTE_UNUSED) {
21 // TODO: The original callers only used 32 and 64 so these are the only
22 // values permitted. Rather than widen the supported values we should
23 // allow 64 for the callers that currently use 32 and remove the
24 // argument altogether.
25 assert((MaxSize == 32 || MaxSize == 64) && "Unexpected size");
26 assert(MaxSize <= 64 && "Unexpected size");
27 assert(((MaxSize > 32) ? Range <= 0xFFFFFFFFFFFFFFFFULL
28 : Range <= 0xFFFFFFFFULL) &&
29 "Enum too large");
30
31 if (Range > 0xFFFFFFFFULL)
32 return "uint64_t";
33 if (Range > 0xFFFF)
34 return "uint32_t";
35 if (Range > 0xFF)
36 return "uint16_t";
37 return "uint8_t";
38}
39