https://gcc.gnu.org/bugzilla/show_bug.cgi?id=112409
Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |INVALID
--- Comment #6 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Frediano Ziglio from comment #5)
> But the pointer "passes" through a "void*" conversion, so there should be no
> aliasing. Or am I missing something?
That's not how aliasing works. You can't just cast to void* to change the
effective type of that struct and magically make it valid to read uint16_t
values from it.
> So what's the standard C way to avoid this (without using specific compiler
> options) ?
memcpy
GCC will also allow you to use a union, but the union has to be visible in the
code that performs the type punning.
