tavianator wrote:
> The expression can be simplified to ... As the padding at the end of the
> structure is always smaller than the alignof. So `round_up(alignof(struct S),
> offsetof(struct S, fam)) = sizeof(struct S)`
I think that's right for sane ABIs. I assume Clang always lays structs out
like this.
My use of `max(sizeof(struct S))` was to support pathological compilers that
add unnecessary padding. But it doesn't completely handle pathological
compilers, since they may also pad
```c
struct S {
int foo;
char fam[N];
};
```
unnecessarily and you can't really predict that. Ignoring that case, your
simplification seems fine to me.
https://github.com/llvm/llvm-project/pull/112636
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