From: Andreas Schwab <schwab@linux-m68k.org>
To: Scott Wood <scottwood@freescale.com>
Cc: Stephen Rothwell <sfr@canb.auug.org.au>, linuxppc-dev@ozlabs.org
Subject: Re: [PATCH] Quieten arch/powerpc in a allmodconfig build.
Date: Fri, 10 Apr 2009 20:35:03 +0200 [thread overview]
Message-ID: <m2bpr4l5m0.fsf@igel.home> (raw)
In-Reply-To: <49DF89F7.2070403@freescale.com> (Scott Wood's message of "Fri, 10 Apr 2009 13:03:35 -0500")
Scott Wood <scottwood@freescale.com> writes:
> The problem is that GCC does not give an error (only a warning) even for
> things like this where it should be trivial to detect that the usage *is*
> uninitialized, not just might be:
>
> int foo(void)
> {
> int a;
>
> return a;
> }
The compiler must not reject this code, because the undefined behavior
only occurs if executed. There is no constraint violated.
Andreas.
--
Andreas Schwab, schwab@linux-m68k.org
GPG Key fingerprint = 58CA 54C7 6D53 942B 1756 01D3 44D5 214B 8276 4ED5
"And now for something completely different."
next prev parent reply other threads:[~2009-04-10 18:35 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-04-08 4:36 [PATCH] Quieten arch/powerpc in a allmodconfig build Tony Breeds
2009-04-08 5:08 ` Michael Ellerman
2009-04-08 5:51 ` Tony Breeds
2009-04-08 6:13 ` Tony Breeds
2009-04-08 6:23 ` Michael Ellerman
2009-04-08 6:48 ` Michael Ellerman
2009-04-08 7:42 ` Geert Uytterhoeven
2009-04-08 18:47 ` Nathan Lynch
2009-04-09 0:01 ` Tony Breeds
2009-04-10 4:21 ` Nathan Lynch
2009-04-10 17:19 ` Segher Boessenkool
2009-04-09 22:46 ` Segher Boessenkool
2009-04-09 22:45 ` Tony Breeds
2009-04-09 23:11 ` Stephen Rothwell
2009-04-09 23:23 ` Segher Boessenkool
2009-04-10 18:03 ` Scott Wood
2009-04-10 18:35 ` Andreas Schwab [this message]
2009-04-10 18:43 ` Scott Wood
2009-04-10 20:28 ` Segher Boessenkool
2009-04-10 20:45 ` Segher Boessenkool
2009-04-10 21:51 ` Scott Wood
2009-04-09 23:18 ` Segher Boessenkool
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=m2bpr4l5m0.fsf@igel.home \
--to=schwab@linux-m68k.org \
--cc=linuxppc-dev@ozlabs.org \
--cc=scottwood@freescale.com \
--cc=sfr@canb.auug.org.au \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).