[Bug target/88437] Excessive struct alignment on x86_64

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88437

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> ---
For arrays, this is required by x86-64 psABI, which says that arrays 16 bytes
or larger must be 16 bytes aligned.
For other aggregates, this is an optimization, so that one can use vector
loads/stores to copy the object etc.
If you want to use section attribute and place the structures as an array, you
need to use aligned attribute and specify the exact alignment you want, then it
will be honored and no gaps will be inserted.