From: Richard Henderson <rth@cygnus.com>
To: Jeffrey A Law <law@hurl.cygnus.com>, richard.earnshaw@arm.com
Cc: Joern Rennecke <amylaar@cygnus.co.uk>, egcs@egcs.cygnus.com
Subject: Re: Propagation of pointer alignment information
Date: Fri, 18 Dec 1998 16:17:00 -0000 [thread overview]
Message-ID: <19981218161730.B23372@dot.cygnus.com> (raw)
In-Reply-To: <29262.913874805@hurl.cygnus.com>
On Wed, Dec 16, 1998 at 11:06:45PM -0700, Jeffrey A Law wrote:
> I'm not a big fan of having lots of options to work around bad user code.
Neither am I.
> I'm willing to go along with this patch if you think this problem is important
> enough to warrant adding the change. But we shouldn't make a habit of hacking
> the compiler to work around bugs in user code.
If the only problem code you've seen is for Ghostscript, I'm not
sure I'd bother. I hacked up the source to make it work for the
Alpha. The key to the hack is that gcc will propogate through a
cast, but not through an assignment to a properly typed variable.
+#define PACKED(pref) ({ const ushort *_T_ = (const ushort *)(pref); _T_; })
Does the trick. I can pass the whole patch along if you are interested.
r~
prev parent reply other threads:[~1998-12-18 16:17 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
1998-12-15 8:50 Richard Earnshaw
1998-12-15 10:04 ` Joern Rennecke
1998-12-16 5:56 ` Richard Earnshaw
1998-12-16 22:07 ` Jeffrey A Law
1998-12-18 16:17 ` Richard Henderson [this message]
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=19981218161730.B23372@dot.cygnus.com \
--to=rth@cygnus.com \
--cc=amylaar@cygnus.co.uk \
--cc=egcs@egcs.cygnus.com \
--cc=law@hurl.cygnus.com \
--cc=richard.earnshaw@arm.com \
/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 read-only IMAP folder(s) and NNTP newsgroup(s).