llvm/Bitcode/BitcodeCommon.h

0001 //===- BitcodeCommon.h - Common code for encode/decode   --------*- C++ -*-===//
0002 //
0003 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
0004 // See https://llvm.org/LICENSE.txt for license information.
0005 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
0006 //
0007 //===----------------------------------------------------------------------===//
0008 //
0009 // This header defines common code to be used by BitcodeWriter and
0010 // BitcodeReader.
0011 //
0012 //===----------------------------------------------------------------------===//
0013
0014 #ifndef LLVM_BITCODE_BITCODECOMMON_H
0015 #define LLVM_BITCODE_BITCODECOMMON_H
0016
0017 #include "llvm/ADT/Bitfields.h"
0018
0019 namespace llvm {
0020
0021 struct AllocaPackedValues {
0022   // We increased the number of bits needed to represent alignment to be more
0023   // than 5, but to preserve backward compatibility we store the upper bits
0024   // separately.
0025   using AlignLower = Bitfield::Element<unsigned, 0, 5>;
0026   using UsedWithInAlloca = Bitfield::Element<bool, AlignLower::NextBit, 1>;
0027   using ExplicitType = Bitfield::Element<bool, UsedWithInAlloca::NextBit, 1>;
0028   using SwiftError = Bitfield::Element<bool, ExplicitType::NextBit, 1>;
0029   using AlignUpper = Bitfield::Element<unsigned, SwiftError::NextBit, 3>;
0030 };
0031
0032 } // namespace llvm
0033
0034 #endif // LLVM_BITCODE_BITCODECOMMON_H