diff options
Diffstat (limited to 'llvm/lib/CodeGen/AsmPrinter/DwarfUnit.cpp')
| -rw-r--r-- | llvm/lib/CodeGen/AsmPrinter/DwarfUnit.cpp | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/llvm/lib/CodeGen/AsmPrinter/DwarfUnit.cpp b/llvm/lib/CodeGen/AsmPrinter/DwarfUnit.cpp index 6e3c43b2b9e..bec554dcdf0 100644 --- a/llvm/lib/CodeGen/AsmPrinter/DwarfUnit.cpp +++ b/llvm/lib/CodeGen/AsmPrinter/DwarfUnit.cpp @@ -1404,9 +1404,11 @@ void DwarfUnit::constructMemberDIE(DIE &Buffer, const DIDerivedType *DT) { addUInt(MemberDie, dwarf::DW_AT_bit_size, None, Size); uint64_t Offset = DT->getOffsetInBits(); - uint32_t Align = DT->getAlignInBits() ? DT->getAlignInBits() - : FieldSize; - uint32_t AlignMask = ~(Align - 1); + // We can't use DT->getAlignInBits() here: AlignInBits for member type + // is non-zero if and only if alignment was forced (e.g. _Alignas()), + // which can't be done with bitfields. Thus we use FieldSize here. + uint32_t AlignInBits = FieldSize; + uint32_t AlignMask = ~(AlignInBits - 1); // The bits from the start of the storage unit to the start of the field. uint64_t StartBitOffset = Offset - (Offset & AlignMask); // The byte offset of the field's aligned storage unit inside the struct. |
