This is the mail archive of the
gcc@gcc.gnu.org
mailing list for the GCC project.
Re: issues with doubles and -fno-schedule-insns2
Matthew J Fletcher writes:
> On Friday 26 Nov 2004 2:27 pm, Nathan Sidwell wrote:
>
> any pointers to 'type based aliasing rules' ? docs for simple folk ?
You really need to read Section 6.3.2.3 in the standard, but I'll give
you the short form:
Except for char*, which is a special case, you may not convert
between pointers to incompatible types and then reference the result.
gcc has a special extension which allows you to put different types
into a union, write as one type and then read as another.
Andrew.