1 //===- BitcodeCommon.h - Common code for encode/decode --------*- C++ -*-===// 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 // This header defines common code to be used by BitcodeWriter and 10 // BitcodeReader. 11 // 12 //===----------------------------------------------------------------------===// 13 14 #ifndef LLVM_BITCODE_BITCODECOMMON_H 15 #define LLVM_BITCODE_BITCODECOMMON_H 16 17 #include "llvm/ADT/Bitfields.h" 18 19 namespace llvm { 20 21 struct AllocaPackedValues { 22 // We increased the number of bits needed to represent alignment to be more 23 // than 5, but to preserve backward compatibility we store the upper bits 24 // separately. 25 using AlignLower = Bitfield::Element<unsigned, 0, 5>; 26 using UsedWithInAlloca = Bitfield::Element<bool, AlignLower::NextBit, 1>; 27 using ExplicitType = Bitfield::Element<bool, UsedWithInAlloca::NextBit, 1>; 28 using SwiftError = Bitfield::Element<bool, ExplicitType::NextBit, 1>; 29 using AlignUpper = Bitfield::Element<unsigned, SwiftError::NextBit, 3>; 30 }; 31 32 } // namespace llvm 33 34 #endif // LLVM_BITCODE_BITCODECOMMON_H 35