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From: "borntraeger at de dot ibm dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/45017] miscompile with bitfield and optimization
Date: Sun, 25 Jul 2010 16:54:00 -0000 [thread overview]
Message-ID: <20100725165406.13738.qmail@sourceware.org> (raw)
In-Reply-To: <bug-45017-18712@http.gcc.gnu.org/bugzilla/>
------- Comment #11 from borntraeger at de dot ibm dot com 2010-07-25 16:54 -------
Something like the following should do the trick.
Is endian.h available on all supported platforms?
*** gcc.c-torture/execute/pr45017.c.orig
--- gcc.c-torture/execute/pr45017.c
***************
*** 1,9 ****
--- 1,17 ----
+ #include <endian.h>
+
int tester(char *bytes)
{
union {
struct {
+ # if __BYTE_ORDER == __BIG_ENDIAN
+ unsigned int r2:4;
+ unsigned int r1:4;
+ # endif
+ # if __BYTE_ORDER == __LITTLE_ENDIAN
unsigned int r1:4;
unsigned int r2:4;
+ # endif
} fmt;
char value[1];
} ovl;
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45017
next prev parent reply other threads:[~2010-07-25 16:54 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-07-21 11:23 [Bug middle-end/45017] New: " borntraeger at de dot ibm dot com
2010-07-21 16:21 ` [Bug middle-end/45017] " rguenth at gcc dot gnu dot org
2010-07-22 12:15 ` rguenth at gcc dot gnu dot org
2010-07-22 12:15 ` rguenth at gcc dot gnu dot org
2010-07-22 12:41 ` borntraeger at de dot ibm dot com
2010-07-22 12:42 ` rguenther at suse dot de
2010-07-22 12:59 ` schwab at linux-m68k dot org
2010-07-23 2:49 ` drow at gcc dot gnu dot org
2010-07-23 13:17 ` danglin at gcc dot gnu dot org
2010-07-25 15:44 ` ebotcazou at gcc dot gnu dot org
2010-07-25 16:46 ` mikpe at it dot uu dot se
2010-07-25 16:54 ` borntraeger at de dot ibm dot com [this message]
2010-07-25 17:13 ` dave at hiauly1 dot hia dot nrc dot ca
2010-07-25 17:15 ` mikpe at it dot uu dot se
2010-07-26 10:13 ` borntraeger at de dot ibm dot com
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