public inbox for gcc-bugs@sourceware.org
help / color / mirror / Atom feed
From: "sliao at google dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/42499] Bad register allocation in multiplication code by constant
Date: Thu, 07 Jan 2010 12:44:00 -0000 [thread overview]
Message-ID: <20100107124357.14712.qmail@sourceware.org> (raw)
In-Reply-To: <bug-42499-17572@http.gcc.gnu.org/bugzilla/>
------- Comment #3 from sliao at google dot com 2010-01-07 12:43 -------
Because:
"This bug can be more easily demonstrated with multiplication of tv_sec by 10
and tv_usec/ 1000 removed"
, the input program is:
#include <sys/time.h>
extern void get_time(struct timeval*);
void test(long long *res)
{
struct timeval tv;
get_time(&tv);
*res = tv.tv_sec * 10;
}
As a result, there is no load of tv.tv_usec in the code generated. Sorry for
the confusion.
--
sliao at google dot com changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jingyu at google dot com,
| |dougkwan at google dot com,
| |carrot at google dot com
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42499
next prev parent reply other threads:[~2010-01-07 12:44 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-12-25 10:12 [Bug rtl-optimization/42499] New: " sliao at google dot com
2009-12-31 15:30 ` [Bug rtl-optimization/42499] " rguenth at gcc dot gnu dot org
2010-01-05 18:28 ` ramana at gcc dot gnu dot org
2010-01-07 12:44 ` sliao at google dot com [this message]
2010-01-07 12:55 ` sliao at google dot com
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=20100107124357.14712.qmail@sourceware.org \
--to=gcc-bugzilla@gcc.gnu.org \
--cc=gcc-bugs@gcc.gnu.org \
/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).