问题
This is a follow-up for this question.
We have an implementation of GCC for our embedded architecture. As such we have control over some aspects of the compiler and optimizer. Such aspect may be potentially forcing the 8-byte aligned allocation of complex float objects. Generally speaking, on our architecture we can optimize access to these objects if they are properly aligned, by requiring a single double-load instruction instead of two regular loads.
Just before a round of enhancements and bug fixes, I am trying to figure out if there are good arguments against forcing such alignment when a complex float object is declared. Is there a reason why not to force that?
来源：https://stackoverflow.com/questions/10934987/is-there-a-reason-why-not-to-force-8-byte-alignment-for-complex-float-type