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//===- Types.cpp - Helper for the selection of C++ data types. ------------===//
//
// 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
//
//===----------------------------------------------------------------------===//
#include "Types.h"
// For LLVM_ATTRIBUTE_UNUSED
#include "llvm/Support/Compiler.h"
#include <cassert>
using namespace llvm;
const char *llvm::getMinimalTypeForRange(uint64_t Range, unsigned MaxSize LLVM_ATTRIBUTE_UNUSED) {
// TODO: The original callers only used 32 and 64 so these are the only
// values permitted. Rather than widen the supported values we should
// allow 64 for the callers that currently use 32 and remove the
// argument altogether.
assert((MaxSize == 32 || MaxSize == 64) && "Unexpected size");
assert(MaxSize <= 64 && "Unexpected size");
assert(((MaxSize > 32) ? Range <= 0xFFFFFFFFFFFFFFFFULL
: Range <= 0xFFFFFFFFULL) &&
"Enum too large");
if (Range > 0xFFFFFFFFULL)
return "uint64_t";
if (Range > 0xFFFF)
return "uint32_t";
if (Range > 0xFF)
return "uint16_t";
return "uint8_t";
}
const char *llvm::getMinimalTypeForEnumBitfield(uint64_t Size) {
uint64_t MaxIndex = Size;
if (MaxIndex > 0)
MaxIndex--;
assert(MaxIndex <= 64 && "Too many bits");
return getMinimalTypeForRange(1ULL << MaxIndex);
}
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