[llvm-bugs] [Bug 25707] [GCC compatibility] different layout for ms_struct with bit-field

via llvm-bugs llvm-bugs at lists.llvm.org
Wed Dec 2 07:45:59 PST 2015


David Majnemer <david.majnemer at gmail.com> changed:

           What    |Removed                     |Added
             Status|NEW                         |RESOLVED
                 CC|                            |david.majnemer at gmail.com
         Resolution|---                         |WONTFIX

--- Comment #1 from David Majnemer <david.majnemer at gmail.com> ---
Our ms_struct support is designed to make us compatible with MSVC's bitfield
algorithm, not with GCC implementation of ms_struct.

Running your example with MSVC 2015 Update 1 (19.00.23427.0) gives:

sizeof(struct B) = 12

offsetof(struct B, BField) = 8

__alignof(struct B) = 4

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