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Re: [PATCH] Fix frame ID comparison problem on s390
On Mon, Jun 28, 2004 at 12:53:43AM +0200, Andreas Schwab wrote:
> Daniel Jacobowitz <drow@false.org> writes:
>
> >> + /* Flags to indicate the above fields have valid contents. */
> >> + int stack_addr_p : 1;
> >> + int code_addr_p : 1;
> >> + int special_addr_p : 1;
> >> };
> >>
> >> /* Methods for constructing and comparing Frame IDs.
> >
> > Some future version of GCC will warn about this mistake. The only
> > valid values for "int : 1" are 0 and -1.
>
> Actually it can be both 0/-1 and 0/1, since it is implementation defined
> whether unadorned int bitfields are signed or unsigned.
Huh, thank you. In any case, thanks for making this explicit, Ulrich.
--
Daniel Jacobowitz