From: Richard Henderson <rth@redhat.com>
To: Morten Welinder <terra@diku.dk>
Cc: gcc@gcc.gnu.org
Subject: Re: Relaxing -Wsign-compare
Date: Thu, 20 Sep 2001 16:34:00 -0000 [thread overview]
Message-ID: <20010920163416.B1034@redhat.com> (raw)
In-Reply-To: <20010920154527.26304.qmail@ntyr.diku.dk>
On Thu, Sep 20, 2001 at 03:45:27PM -0000, Morten Welinder wrote:
> Would it be reasonable to silence this warning when one of the sides is
> a constant (in the C meaning) that fits well within the range of the
> other side's type?
No.
C type rules still mandate the promotion of the signed argument to
unsigned. Which means that if you do not know for a fact that the
signed argument is non-negative, you still have a problem. Which
you can't know without data-flow analysis, and the warning is based
simply on the existance of the promotion.
Make 'i' a size_t like it ought to have been in the first place.
r~
next prev parent reply other threads:[~2001-09-20 16:34 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-09-20 8:45 Morten Welinder
2001-09-20 11:43 ` Neil Booth
2001-09-20 12:03 ` Morten Welinder
2001-09-20 16:37 ` Richard Henderson
2001-09-20 12:11 ` Frank Klemm
2001-09-21 2:46 ` Gabriel Paubert
2001-09-20 16:34 ` Richard Henderson [this message]
2001-09-21 10:48 ` Morten Welinder
2001-09-21 11:07 ` Richard Henderson
2001-09-21 14:47 ` Fergus Henderson
2001-09-23 15:30 ` Frank Klemm
2001-09-21 14:54 ` Fergus Henderson
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