https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101539
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
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CC| |jakub at gcc dot gnu.org
--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 51186
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=51186&action=edit
gcc12-pr101539.patch
So, I've tried to play with the __is_layout_compatible trait, here is the
result. There is one known bug, the C++ FE unfortunately removes zero sized
bit-fields early, for layout compatibility we need them (and now just that they
were present but how many as well and their types). Can we not remove them or
remove them when the FE parses the whole TU?
The testcase also contains various cornercases where layout-compatibility as
currently defined is just weird.
