This is the mail archive of the gcc-bugs@gcc.gnu.org mailing list for the GCC project.


Index Nav: [Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav: [Date Prev] [Date Next] [Thread Prev] [Thread Next]
Other format: [Raw text]

Re: [Bug middle-end/29574] Gcc gives invalid warning about unitialized variable


> 
> 
> 
> ------- Comment #8 from mbligh at mbligh dot org  2006-10-23 21:50 -------
> > Initialize the variable and forget about inefficiency.  Again this is fixed for
> > 4.2.0, the warning is only because __builtin_expect gets in the way of figuring
> > out if the variable is used uninitialized, nothing more.
> 
> I understand the __builtin_expect case is fixed in 4.2, and am fine with that,
> but I was talking about the ones that aren't inlined, and don't use
> builtin_expect. Does gcc 4.2 walk through functions as well, or will it always
> produce an invalid warning there?

No, for ones which are not inlined, GCC does not look through other functions to
check for the warning.

Thanks,
Andrew Pinski


Index Nav: [Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav: [Date Prev] [Date Next] [Thread Prev] [Thread Next]