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* [Bug c/36077] New: Expressions result is wrong
@ 2008-04-29 10:22 peter at xmos dot com
2008-04-29 10:23 ` [Bug c/36077] " peter at xmos dot com
` (10 more replies)
0 siblings, 11 replies; 12+ messages in thread
From: peter at xmos dot com @ 2008-04-29 10:22 UTC (permalink / raw)
To: gcc-bugs
I am developing a test generator for in house compilers and have come across a
difference where gcc does not agree with our compilers or the Microsoft
compiler.
The result t1_2a of the expression is what differs between gcc and other
compilers.
This is on gcc (GCC) 3.4.6 20060404 (Red Hat 3.4.6-9), and does not matter what
the platform is.
Compiled with:
$ gcc4 test.c -o test.exe
$ ./test.exe
Error:
t1_2a ffffffff
t1_2b 22a8b02e
t1_2c 0
Working:
t2_2a 0
t2_2b 0
When compared to running on Visual Studio:
$ cl test.c
Microsoft (R) 32-bit C/C++ Optimizing Compiler Version 14.00.50727.762 for
80x86
Copyright (C) Microsoft Corporation. All rights reserved.
test.c
Microsoft (R) Incremental Linker Version 8.00.50727.762
Copyright (C) Microsoft Corporation. All rights reserved.
/out:test.exe
test.obj
$ ./test.exe
Error:
t1_2a 0
t1_2b 22a8b02e
t1_2c 0
Working:
t2_2a 0
t2_2b 0
--
Summary: Expressions result is wrong
Product: gcc
Version: 4.1.2
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: peter at xmos dot com
GCC build triplet: gcc version 4.1.2 20070626 (Red Hat 4.1.2-14)
GCC host triplet: Linux 2.6.9-67.ELsmp #1 SMP Wed Nov 7 13:56:44 EST 2007
x86_64 x
GCC target triplet: Target: x86_64-redhat-linux
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36077
^ permalink raw reply [flat|nested] 12+ messages in thread
* [Bug c/36077] Expressions result is wrong
2008-04-29 10:22 [Bug c/36077] New: Expressions result is wrong peter at xmos dot com
@ 2008-04-29 10:23 ` peter at xmos dot com
2008-04-29 10:23 ` peter at xmos dot com
` (9 subsequent siblings)
10 siblings, 0 replies; 12+ messages in thread
From: peter at xmos dot com @ 2008-04-29 10:23 UTC (permalink / raw)
To: gcc-bugs
------- Comment #2 from peter at xmos dot com 2008-04-29 10:23 -------
Created an attachment (id=15544)
--> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=15544&action=view)
test.i
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36077
^ permalink raw reply [flat|nested] 12+ messages in thread
* [Bug c/36077] Expressions result is wrong
2008-04-29 10:22 [Bug c/36077] New: Expressions result is wrong peter at xmos dot com
2008-04-29 10:23 ` [Bug c/36077] " peter at xmos dot com
@ 2008-04-29 10:23 ` peter at xmos dot com
2008-04-29 11:41 ` [Bug middle-end/36077] " rguenth at gcc dot gnu dot org
` (8 subsequent siblings)
10 siblings, 0 replies; 12+ messages in thread
From: peter at xmos dot com @ 2008-04-29 10:23 UTC (permalink / raw)
To: gcc-bugs
------- Comment #1 from peter at xmos dot com 2008-04-29 10:23 -------
Created an attachment (id=15543)
--> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=15543&action=view)
test.c
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36077
^ permalink raw reply [flat|nested] 12+ messages in thread
* [Bug middle-end/36077] Expressions result is wrong
2008-04-29 10:22 [Bug c/36077] New: Expressions result is wrong peter at xmos dot com
2008-04-29 10:23 ` [Bug c/36077] " peter at xmos dot com
2008-04-29 10:23 ` peter at xmos dot com
@ 2008-04-29 11:41 ` rguenth at gcc dot gnu dot org
2008-04-29 11:41 ` rguenth at gcc dot gnu dot org
` (7 subsequent siblings)
10 siblings, 0 replies; 12+ messages in thread
From: rguenth at gcc dot gnu dot org @ 2008-04-29 11:41 UTC (permalink / raw)
To: gcc-bugs
------- Comment #4 from rguenth at gcc dot gnu dot org 2008-04-29 11:41 -------
Mine.
--
rguenth at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
AssignedTo|unassigned at gcc dot gnu |rguenth at gcc dot gnu dot
|dot org |org
Status|NEW |ASSIGNED
Known to fail| |3.3.3 4.3.0
Known to work| |2.95.3
Last reconfirmed|2008-04-29 11:40:23 |2008-04-29 11:41:15
date| |
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36077
^ permalink raw reply [flat|nested] 12+ messages in thread
* [Bug middle-end/36077] Expressions result is wrong
2008-04-29 10:22 [Bug c/36077] New: Expressions result is wrong peter at xmos dot com
` (2 preceding siblings ...)
2008-04-29 11:41 ` [Bug middle-end/36077] " rguenth at gcc dot gnu dot org
@ 2008-04-29 11:41 ` rguenth at gcc dot gnu dot org
2008-04-29 13:54 ` rguenth at gcc dot gnu dot org
` (6 subsequent siblings)
10 siblings, 0 replies; 12+ messages in thread
From: rguenth at gcc dot gnu dot org @ 2008-04-29 11:41 UTC (permalink / raw)
To: gcc-bugs
------- Comment #3 from rguenth at gcc dot gnu dot org 2008-04-29 11:40 -------
Confirmed. Testcase:
extern void abort (void);
unsigned test (unsigned x)
{
return x / 0x80000001U / 0x00000002U;
}
int main()
{
if (test(2) != 0)
abort ();
return 0;
}
--
rguenth at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Component|c |middle-end
Ever Confirmed|0 |1
GCC build triplet|gcc version 4.1.2 20070626 |
|(Red Hat 4.1.2-14) |
GCC host triplet|Linux 2.6.9-67.ELsmp #1 SMP |
|Wed Nov 7 13:56:44 EST 2007 |
|x86_64 x |
GCC target triplet|Target: x86_64-redhat-linux |
Keywords| |wrong-code
Last reconfirmed|0000-00-00 00:00:00 |2008-04-29 11:40:23
date| |
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36077
^ permalink raw reply [flat|nested] 12+ messages in thread
* [Bug middle-end/36077] Expressions result is wrong
2008-04-29 10:22 [Bug c/36077] New: Expressions result is wrong peter at xmos dot com
` (3 preceding siblings ...)
2008-04-29 11:41 ` rguenth at gcc dot gnu dot org
@ 2008-04-29 13:54 ` rguenth at gcc dot gnu dot org
2008-04-29 13:54 ` rguenth at gcc dot gnu dot org
` (5 subsequent siblings)
10 siblings, 0 replies; 12+ messages in thread
From: rguenth at gcc dot gnu dot org @ 2008-04-29 13:54 UTC (permalink / raw)
To: gcc-bugs
------- Comment #5 from rguenth at gcc dot gnu dot org 2008-04-29 13:53 -------
Fixed on the trunk.
--
rguenth at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
Known to work|2.95.3 |2.95.3 4.4.0
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36077
^ permalink raw reply [flat|nested] 12+ messages in thread
* [Bug middle-end/36077] Expressions result is wrong
2008-04-29 10:22 [Bug c/36077] New: Expressions result is wrong peter at xmos dot com
` (4 preceding siblings ...)
2008-04-29 13:54 ` rguenth at gcc dot gnu dot org
@ 2008-04-29 13:54 ` rguenth at gcc dot gnu dot org
2008-04-29 15:14 ` rguenth at gcc dot gnu dot org
` (4 subsequent siblings)
10 siblings, 0 replies; 12+ messages in thread
From: rguenth at gcc dot gnu dot org @ 2008-04-29 13:54 UTC (permalink / raw)
To: gcc-bugs
------- Comment #6 from rguenth at gcc dot gnu dot org 2008-04-29 13:53 -------
Subject: Bug 36077
Author: rguenth
Date: Tue Apr 29 13:52:53 2008
New Revision: 134792
URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=134792
Log:
2008-04-29 Richard Guenther <rguenther@suse.de>
PR middle-end/36077
* fold-const.c (extract_muldiv_1): In combining division constants
make sure to never overflow.
* gcc.c-torture/execute/pr36077.c: New testcase.
Added:
trunk/gcc/testsuite/gcc.c-torture/execute/pr36077.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/fold-const.c
trunk/gcc/testsuite/ChangeLog
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36077
^ permalink raw reply [flat|nested] 12+ messages in thread
* [Bug middle-end/36077] [4.1/4.2 Regression] Expressions result is wrong
2008-04-29 10:22 [Bug c/36077] New: Expressions result is wrong peter at xmos dot com
` (6 preceding siblings ...)
2008-04-29 15:14 ` rguenth at gcc dot gnu dot org
@ 2008-04-29 15:14 ` rguenth at gcc dot gnu dot org
2008-05-19 20:35 ` jsm28 at gcc dot gnu dot org
` (2 subsequent siblings)
10 siblings, 0 replies; 12+ messages in thread
From: rguenth at gcc dot gnu dot org @ 2008-04-29 15:14 UTC (permalink / raw)
To: gcc-bugs
------- Comment #8 from rguenth at gcc dot gnu dot org 2008-04-29 15:13 -------
Also fixed on the 4.3 branch. Unassigning.
--
rguenth at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
AssignedTo|rguenth at gcc dot gnu dot |unassigned at gcc dot gnu
|org |dot org
Status|ASSIGNED |NEW
Known to fail|3.3.3 4.3.0 |3.3.3 4.1.2 4.2.3 4.3.0
Known to work|2.95.3 4.4.0 |2.95.3 4.3.1 4.4.0
Summary|Expressions result is wrong |[4.1/4.2 Regression]
| |Expressions result is wrong
Target Milestone|--- |4.2.4
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36077
^ permalink raw reply [flat|nested] 12+ messages in thread
* [Bug middle-end/36077] Expressions result is wrong
2008-04-29 10:22 [Bug c/36077] New: Expressions result is wrong peter at xmos dot com
` (5 preceding siblings ...)
2008-04-29 13:54 ` rguenth at gcc dot gnu dot org
@ 2008-04-29 15:14 ` rguenth at gcc dot gnu dot org
2008-04-29 15:14 ` [Bug middle-end/36077] [4.1/4.2 Regression] " rguenth at gcc dot gnu dot org
` (3 subsequent siblings)
10 siblings, 0 replies; 12+ messages in thread
From: rguenth at gcc dot gnu dot org @ 2008-04-29 15:14 UTC (permalink / raw)
To: gcc-bugs
------- Comment #7 from rguenth at gcc dot gnu dot org 2008-04-29 15:13 -------
Subject: Bug 36077
Author: rguenth
Date: Tue Apr 29 15:12:21 2008
New Revision: 134794
URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=134794
Log:
2008-04-29 Richard Guenther <rguenther@suse.de>
PR middle-end/36077
* fold-const.c (extract_muldiv_1): In combining division constants
make sure to never overflow.
* gcc.c-torture/execute/pr36077.c: New testcase.
Added:
branches/gcc-4_3-branch/gcc/testsuite/gcc.c-torture/execute/pr36077.c
- copied unchanged from r134792,
trunk/gcc/testsuite/gcc.c-torture/execute/pr36077.c
Modified:
branches/gcc-4_3-branch/gcc/ChangeLog
branches/gcc-4_3-branch/gcc/fold-const.c
branches/gcc-4_3-branch/gcc/testsuite/ChangeLog
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36077
^ permalink raw reply [flat|nested] 12+ messages in thread
* [Bug middle-end/36077] [4.1/4.2 Regression] Expressions result is wrong
2008-04-29 10:22 [Bug c/36077] New: Expressions result is wrong peter at xmos dot com
` (7 preceding siblings ...)
2008-04-29 15:14 ` [Bug middle-end/36077] [4.1/4.2 Regression] " rguenth at gcc dot gnu dot org
@ 2008-05-19 20:35 ` jsm28 at gcc dot gnu dot org
2008-07-04 23:03 ` [Bug middle-end/36077] [4.2 " jsm28 at gcc dot gnu dot org
2009-03-31 15:37 ` jsm28 at gcc dot gnu dot org
10 siblings, 0 replies; 12+ messages in thread
From: jsm28 at gcc dot gnu dot org @ 2008-05-19 20:35 UTC (permalink / raw)
To: gcc-bugs
------- Comment #9 from jsm28 at gcc dot gnu dot org 2008-05-19 20:25 -------
4.2.4 is being released, changing milestones to 4.2.5.
--
jsm28 at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|4.2.4 |4.2.5
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36077
^ permalink raw reply [flat|nested] 12+ messages in thread
* [Bug middle-end/36077] [4.2 Regression] Expressions result is wrong
2008-04-29 10:22 [Bug c/36077] New: Expressions result is wrong peter at xmos dot com
` (8 preceding siblings ...)
2008-05-19 20:35 ` jsm28 at gcc dot gnu dot org
@ 2008-07-04 23:03 ` jsm28 at gcc dot gnu dot org
2009-03-31 15:37 ` jsm28 at gcc dot gnu dot org
10 siblings, 0 replies; 12+ messages in thread
From: jsm28 at gcc dot gnu dot org @ 2008-07-04 23:03 UTC (permalink / raw)
To: gcc-bugs
------- Comment #10 from jsm28 at gcc dot gnu dot org 2008-07-04 23:02 -------
Closing 4.1 branch.
--
jsm28 at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
Summary|[4.1/4.2 Regression] |[4.2 Regression] Expressions
|Expressions result is wrong |result is wrong
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36077
^ permalink raw reply [flat|nested] 12+ messages in thread
* [Bug middle-end/36077] [4.2 Regression] Expressions result is wrong
2008-04-29 10:22 [Bug c/36077] New: Expressions result is wrong peter at xmos dot com
` (9 preceding siblings ...)
2008-07-04 23:03 ` [Bug middle-end/36077] [4.2 " jsm28 at gcc dot gnu dot org
@ 2009-03-31 15:37 ` jsm28 at gcc dot gnu dot org
10 siblings, 0 replies; 12+ messages in thread
From: jsm28 at gcc dot gnu dot org @ 2009-03-31 15:37 UTC (permalink / raw)
To: gcc-bugs
------- Comment #11 from jsm28 at gcc dot gnu dot org 2009-03-31 15:37 -------
Closing 4.2 branch, fixed in 4.3.1 and 4.4.
--
jsm28 at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Known to fail|3.3.3 4.1.2 4.2.3 4.3.0 |3.3.3 4.1.2 4.2.3 4.3.0
| |4.2.5
Resolution| |FIXED
Target Milestone|4.2.5 |4.3.1
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36077
^ permalink raw reply [flat|nested] 12+ messages in thread
end of thread, other threads:[~2009-03-31 15:37 UTC | newest]
Thread overview: 12+ messages (download: mbox.gz / follow: Atom feed)
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2008-04-29 10:22 [Bug c/36077] New: Expressions result is wrong peter at xmos dot com
2008-04-29 10:23 ` [Bug c/36077] " peter at xmos dot com
2008-04-29 10:23 ` peter at xmos dot com
2008-04-29 11:41 ` [Bug middle-end/36077] " rguenth at gcc dot gnu dot org
2008-04-29 11:41 ` rguenth at gcc dot gnu dot org
2008-04-29 13:54 ` rguenth at gcc dot gnu dot org
2008-04-29 13:54 ` rguenth at gcc dot gnu dot org
2008-04-29 15:14 ` rguenth at gcc dot gnu dot org
2008-04-29 15:14 ` [Bug middle-end/36077] [4.1/4.2 Regression] " rguenth at gcc dot gnu dot org
2008-05-19 20:35 ` jsm28 at gcc dot gnu dot org
2008-07-04 23:03 ` [Bug middle-end/36077] [4.2 " jsm28 at gcc dot gnu dot org
2009-03-31 15:37 ` jsm28 at gcc dot gnu dot org
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