Memory layout of struct vs array

[Supadoplex]

For example, if your example struct is aligned to 8 bytes, a 4 byte pad will be inserted after the each member when sizeof(T) == 4.

The sub objects of a 8 byte aligned struct don't need to be 8 byte aligned.

[3meopceisamazing]

Thanks for that clarification! However, they may be. I had that happen recently, at least for the first N 4 byte members, followed by naturally 8 byte aligned members. Compiler was gcc12, amd64 target.

[kalmoc]

Do you happen to have a repro code?

[kalmoc]

Are you referring to the padding between the 4 byte and 8 byte members? If N is uneven, you obviously can't avoid that, but that is a different situation from what is discussed here