https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102401
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Resolution|INVALID |---
Last reconfirmed| |2021-09-20
Ever confirmed|0 |1
Status|RESOLVED |REOPENED
--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
We need to fix PR78620 first.
I think one thing is adding some CONSTRUCTOR_ZERO_PADDING flag on CONSTRUCTORs
(meaning that padding is zero initialized), propagate it through the FE and
handle in constexpr there and handle that during gimplification, either by
__builtin_clear_padding or pre-zeroing the whole memory (TREE_STATIC vars don't
need that of course).
And then there is a question if we don't need further middle-end changes,
because a mere struct assignment in the GIMPLE IL doesn't guarantee copying of
the padding bits.
