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* [Bug c/40747] New: [4.4/4.5 Regression] wrong code for int-is-in-range test at -O1 and above
@ 2009-07-14 16:32 zsojka at seznam dot cz
2009-07-14 16:36 ` [Bug c/40747] " zsojka at seznam dot cz
` (12 more replies)
0 siblings, 13 replies; 14+ messages in thread
From: zsojka at seznam dot cz @ 2009-07-14 16:32 UTC (permalink / raw)
To: gcc-bugs
Tested with:
trunk r149624
# ./gcc -v
Using built-in specs.
Target: x86_64-unknown-linux-gnu
Configured with: ../configure --enable-languages=c,c++
--prefix=/mnt/svn/gcc-trunk/build/
Thread model: posix
gcc version 4.5.0 20090714 (experimental) (GCC)
and gentoo's 4.4.0, 4.5_alpha20090709
The following code is miscompiled
------------------------
// command line: gcc tst.c -c -o tst.o -O1
// or: with -m32
int f3(int i) {
return (i < 4 && i >= 0) ? i : 4;
}
------------------------
Resulting (relevant) asm is:
------------------------
f3:
.LFB0:
.cfi_startproc
cmpl $4, %edi
movl $4, %eax
cmovle %edi, %eax
ret
.cfi_endproc
------------------------
For the following code:
------------------------
// command line: gcc tst.c -c -o tst.o -O1
// or: with -m32
#include <stdio.h>
int f3(int i) {
return (i < 4 && i >= 0) ? i : 4;
}
int main() {
printf("%d %d %d\n", f3(-1), f3(2), f3(5));
}
------------------------
Result is "-1 2 4", but it should be "4 2 4" (as it is with -O0)
--
Summary: [4.4/4.5 Regression] wrong code for int-is-in-range test
at -O1 and above
Product: gcc
Version: 4.4.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: zsojka at seznam dot cz
GCC host triplet: x86_64-pc-linux-gnu
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40747
^ permalink raw reply [flat|nested] 14+ messages in thread
* [Bug c/40747] [4.4/4.5 Regression] wrong code for int-is-in-range test at -O1 and above
2009-07-14 16:32 [Bug c/40747] New: [4.4/4.5 Regression] wrong code for int-is-in-range test at -O1 and above zsojka at seznam dot cz
@ 2009-07-14 16:36 ` zsojka at seznam dot cz
2009-07-14 17:16 ` sezeroz at gmail dot com
` (11 subsequent siblings)
12 siblings, 0 replies; 14+ messages in thread
From: zsojka at seznam dot cz @ 2009-07-14 16:36 UTC (permalink / raw)
To: gcc-bugs
------- Comment #1 from zsojka at seznam dot cz 2009-07-14 16:35 -------
Created an attachment (id=18194)
--> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=18194&action=view)
preprocessed source
most of that file is content of included <stdio.h>
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40747
^ permalink raw reply [flat|nested] 14+ messages in thread
* [Bug c/40747] [4.4/4.5 Regression] wrong code for int-is-in-range test at -O1 and above
2009-07-14 16:32 [Bug c/40747] New: [4.4/4.5 Regression] wrong code for int-is-in-range test at -O1 and above zsojka at seznam dot cz
2009-07-14 16:36 ` [Bug c/40747] " zsojka at seznam dot cz
@ 2009-07-14 17:16 ` sezeroz at gmail dot com
2009-07-14 17:26 ` jakub at gcc dot gnu dot org
` (10 subsequent siblings)
12 siblings, 0 replies; 14+ messages in thread
From: sezeroz at gmail dot com @ 2009-07-14 17:16 UTC (permalink / raw)
To: gcc-bugs
------- Comment #2 from sezeroz at gmail dot com 2009-07-14 17:16 -------
Also happens with i686-pc-linux-gnu with gcc-4.4.1 (gcc-4_4-branch, r149543).
--
sezeroz at gmail dot com changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |sezeroz at gmail dot com
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40747
^ permalink raw reply [flat|nested] 14+ messages in thread
* [Bug c/40747] [4.4/4.5 Regression] wrong code for int-is-in-range test at -O1 and above
2009-07-14 16:32 [Bug c/40747] New: [4.4/4.5 Regression] wrong code for int-is-in-range test at -O1 and above zsojka at seznam dot cz
2009-07-14 16:36 ` [Bug c/40747] " zsojka at seznam dot cz
2009-07-14 17:16 ` sezeroz at gmail dot com
@ 2009-07-14 17:26 ` jakub at gcc dot gnu dot org
2009-07-14 18:00 ` jakub at gcc dot gnu dot org
` (9 subsequent siblings)
12 siblings, 0 replies; 14+ messages in thread
From: jakub at gcc dot gnu dot org @ 2009-07-14 17:26 UTC (permalink / raw)
To: gcc-bugs
------- Comment #3 from jakub at gcc dot gnu dot org 2009-07-14 17:25 -------
Confirmed, introduced between r134374 + r134467, looking into it.
--
jakub at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
AssignedTo|unassigned at gcc dot gnu |jakub at gcc dot gnu dot org
|dot org |
Status|UNCONFIRMED |ASSIGNED
Ever Confirmed|0 |1
Last reconfirmed|0000-00-00 00:00:00 |2009-07-14 17:25:58
date| |
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40747
^ permalink raw reply [flat|nested] 14+ messages in thread
* [Bug c/40747] [4.4/4.5 Regression] wrong code for int-is-in-range test at -O1 and above
2009-07-14 16:32 [Bug c/40747] New: [4.4/4.5 Regression] wrong code for int-is-in-range test at -O1 and above zsojka at seznam dot cz
` (2 preceding siblings ...)
2009-07-14 17:26 ` jakub at gcc dot gnu dot org
@ 2009-07-14 18:00 ` jakub at gcc dot gnu dot org
2009-07-15 7:32 ` [Bug middle-end/40747] " steven at gcc dot gnu dot org
` (8 subsequent siblings)
12 siblings, 0 replies; 14+ messages in thread
From: jakub at gcc dot gnu dot org @ 2009-07-14 18:00 UTC (permalink / raw)
To: gcc-bugs
------- Comment #4 from jakub at gcc dot gnu dot org 2009-07-14 18:00 -------
Indeed, caused by http://gcc.gnu.org/ml/gcc-patches/2008-04/msg01303.html
(r134384).
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40747
^ permalink raw reply [flat|nested] 14+ messages in thread
* [Bug middle-end/40747] [4.4/4.5 Regression] wrong code for int-is-in-range test at -O1 and above
2009-07-14 16:32 [Bug c/40747] New: [4.4/4.5 Regression] wrong code for int-is-in-range test at -O1 and above zsojka at seznam dot cz
` (3 preceding siblings ...)
2009-07-14 18:00 ` jakub at gcc dot gnu dot org
@ 2009-07-15 7:32 ` steven at gcc dot gnu dot org
2009-07-15 8:19 ` sezeroz at gmail dot com
` (7 subsequent siblings)
12 siblings, 0 replies; 14+ messages in thread
From: steven at gcc dot gnu dot org @ 2009-07-15 7:32 UTC (permalink / raw)
To: gcc-bugs
--
steven at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|--- |4.4.2
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40747
^ permalink raw reply [flat|nested] 14+ messages in thread
* [Bug middle-end/40747] [4.4/4.5 Regression] wrong code for int-is-in-range test at -O1 and above
2009-07-14 16:32 [Bug c/40747] New: [4.4/4.5 Regression] wrong code for int-is-in-range test at -O1 and above zsojka at seznam dot cz
` (4 preceding siblings ...)
2009-07-15 7:32 ` [Bug middle-end/40747] " steven at gcc dot gnu dot org
@ 2009-07-15 8:19 ` sezeroz at gmail dot com
2009-07-15 8:28 ` jakub at gcc dot gnu dot org
` (6 subsequent siblings)
12 siblings, 0 replies; 14+ messages in thread
From: sezeroz at gmail dot com @ 2009-07-15 8:19 UTC (permalink / raw)
To: gcc-bugs
------- Comment #5 from sezeroz at gmail dot com 2009-07-15 08:19 -------
This bug may result in unreliable binary outputs, why is it targeted for fixing
in 4.4.2 and not in 4.4.1?
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40747
^ permalink raw reply [flat|nested] 14+ messages in thread
* [Bug middle-end/40747] [4.4/4.5 Regression] wrong code for int-is-in-range test at -O1 and above
2009-07-14 16:32 [Bug c/40747] New: [4.4/4.5 Regression] wrong code for int-is-in-range test at -O1 and above zsojka at seznam dot cz
` (5 preceding siblings ...)
2009-07-15 8:19 ` sezeroz at gmail dot com
@ 2009-07-15 8:28 ` jakub at gcc dot gnu dot org
2009-07-15 8:30 ` jakub at gcc dot gnu dot org
` (5 subsequent siblings)
12 siblings, 0 replies; 14+ messages in thread
From: jakub at gcc dot gnu dot org @ 2009-07-15 8:28 UTC (permalink / raw)
To: gcc-bugs
------- Comment #6 from jakub at gcc dot gnu dot org 2009-07-15 08:28 -------
I'm already bootstrapping/regtesting a fix, will post afterwards.
If it gets approved quickly, I'll include it in 4.4.1-rc1 I plan to roll today.
--
jakub at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|4.4.2 |4.4.1
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40747
^ permalink raw reply [flat|nested] 14+ messages in thread
* [Bug middle-end/40747] [4.4/4.5 Regression] wrong code for int-is-in-range test at -O1 and above
2009-07-14 16:32 [Bug c/40747] New: [4.4/4.5 Regression] wrong code for int-is-in-range test at -O1 and above zsojka at seznam dot cz
` (6 preceding siblings ...)
2009-07-15 8:28 ` jakub at gcc dot gnu dot org
@ 2009-07-15 8:30 ` jakub at gcc dot gnu dot org
2009-07-15 9:48 ` jakub at gcc dot gnu dot org
` (4 subsequent siblings)
12 siblings, 0 replies; 14+ messages in thread
From: jakub at gcc dot gnu dot org @ 2009-07-15 8:30 UTC (permalink / raw)
To: gcc-bugs
--
jakub at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P1
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40747
^ permalink raw reply [flat|nested] 14+ messages in thread
* [Bug middle-end/40747] [4.4/4.5 Regression] wrong code for int-is-in-range test at -O1 and above
2009-07-14 16:32 [Bug c/40747] New: [4.4/4.5 Regression] wrong code for int-is-in-range test at -O1 and above zsojka at seznam dot cz
` (7 preceding siblings ...)
2009-07-15 8:30 ` jakub at gcc dot gnu dot org
@ 2009-07-15 9:48 ` jakub at gcc dot gnu dot org
2009-07-15 10:18 ` jakub at gcc dot gnu dot org
` (3 subsequent siblings)
12 siblings, 0 replies; 14+ messages in thread
From: jakub at gcc dot gnu dot org @ 2009-07-15 9:48 UTC (permalink / raw)
To: gcc-bugs
------- Comment #7 from jakub at gcc dot gnu dot org 2009-07-15 09:48 -------
Patch posted: http://gcc.gnu.org/ml/gcc-patches/2009-07/msg00842.html
--
jakub at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
URL| |http://gcc.gnu.org/ml/gcc-
| |patches/2009-
| |07/msg00842.html
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40747
^ permalink raw reply [flat|nested] 14+ messages in thread
* [Bug middle-end/40747] [4.4/4.5 Regression] wrong code for int-is-in-range test at -O1 and above
2009-07-14 16:32 [Bug c/40747] New: [4.4/4.5 Regression] wrong code for int-is-in-range test at -O1 and above zsojka at seznam dot cz
` (8 preceding siblings ...)
2009-07-15 9:48 ` jakub at gcc dot gnu dot org
@ 2009-07-15 10:18 ` jakub at gcc dot gnu dot org
2009-07-15 11:23 ` jakub at gcc dot gnu dot org
` (2 subsequent siblings)
12 siblings, 0 replies; 14+ messages in thread
From: jakub at gcc dot gnu dot org @ 2009-07-15 10:18 UTC (permalink / raw)
To: gcc-bugs
------- Comment #8 from jakub at gcc dot gnu dot org 2009-07-15 10:18 -------
Subject: Bug 40747
Author: jakub
Date: Wed Jul 15 10:17:54 2009
New Revision: 149675
URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=149675
Log:
PR middle-end/40747
* fold-const.c (fold_cond_expr_with_comparison): When folding
< and <= to MIN, make sure the MIN uses the same type as the
comparison's operands.
* gcc.c-torture/execute/pr40747.c: New test.
Added:
trunk/gcc/testsuite/gcc.c-torture/execute/pr40747.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/fold-const.c
trunk/gcc/testsuite/ChangeLog
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40747
^ permalink raw reply [flat|nested] 14+ messages in thread
* [Bug middle-end/40747] [4.4/4.5 Regression] wrong code for int-is-in-range test at -O1 and above
2009-07-14 16:32 [Bug c/40747] New: [4.4/4.5 Regression] wrong code for int-is-in-range test at -O1 and above zsojka at seznam dot cz
` (9 preceding siblings ...)
2009-07-15 10:18 ` jakub at gcc dot gnu dot org
@ 2009-07-15 11:23 ` jakub at gcc dot gnu dot org
2009-07-15 11:26 ` jakub at gcc dot gnu dot org
2009-10-21 10:51 ` mikpe at it dot uu dot se
12 siblings, 0 replies; 14+ messages in thread
From: jakub at gcc dot gnu dot org @ 2009-07-15 11:23 UTC (permalink / raw)
To: gcc-bugs
------- Comment #9 from jakub at gcc dot gnu dot org 2009-07-15 11:23 -------
Subject: Bug 40747
Author: jakub
Date: Wed Jul 15 11:23:22 2009
New Revision: 149681
URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=149681
Log:
PR middle-end/40747
* fold-const.c (fold_cond_expr_with_comparison): When folding
< and <= to MIN, make sure the MIN uses the same type as the
comparison's operands.
* gcc.c-torture/execute/pr40747.c: New test.
Added:
branches/gcc-4_4-branch/gcc/testsuite/gcc.c-torture/execute/pr40747.c
Modified:
branches/gcc-4_4-branch/gcc/ChangeLog
branches/gcc-4_4-branch/gcc/fold-const.c
branches/gcc-4_4-branch/gcc/testsuite/ChangeLog
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40747
^ permalink raw reply [flat|nested] 14+ messages in thread
* [Bug middle-end/40747] [4.4/4.5 Regression] wrong code for int-is-in-range test at -O1 and above
2009-07-14 16:32 [Bug c/40747] New: [4.4/4.5 Regression] wrong code for int-is-in-range test at -O1 and above zsojka at seznam dot cz
` (10 preceding siblings ...)
2009-07-15 11:23 ` jakub at gcc dot gnu dot org
@ 2009-07-15 11:26 ` jakub at gcc dot gnu dot org
2009-10-21 10:51 ` mikpe at it dot uu dot se
12 siblings, 0 replies; 14+ messages in thread
From: jakub at gcc dot gnu dot org @ 2009-07-15 11:26 UTC (permalink / raw)
To: gcc-bugs
------- Comment #10 from jakub at gcc dot gnu dot org 2009-07-15 11:26 -------
Fixed.
--
jakub at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution| |FIXED
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40747
^ permalink raw reply [flat|nested] 14+ messages in thread
* [Bug middle-end/40747] [4.4/4.5 Regression] wrong code for int-is-in-range test at -O1 and above
2009-07-14 16:32 [Bug c/40747] New: [4.4/4.5 Regression] wrong code for int-is-in-range test at -O1 and above zsojka at seznam dot cz
` (11 preceding siblings ...)
2009-07-15 11:26 ` jakub at gcc dot gnu dot org
@ 2009-10-21 10:51 ` mikpe at it dot uu dot se
12 siblings, 0 replies; 14+ messages in thread
From: mikpe at it dot uu dot se @ 2009-10-21 10:51 UTC (permalink / raw)
To: gcc-bugs
------- Comment #11 from mikpe at it dot uu dot se 2009-10-21 10:51 -------
*** Bug 40547 has been marked as a duplicate of this bug. ***
--
mikpe at it dot uu dot se changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |mikpe at it dot uu dot se
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40747
^ permalink raw reply [flat|nested] 14+ messages in thread
end of thread, other threads:[~2009-10-21 10:51 UTC | newest]
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2009-07-14 16:32 [Bug c/40747] New: [4.4/4.5 Regression] wrong code for int-is-in-range test at -O1 and above zsojka at seznam dot cz
2009-07-14 16:36 ` [Bug c/40747] " zsojka at seznam dot cz
2009-07-14 17:16 ` sezeroz at gmail dot com
2009-07-14 17:26 ` jakub at gcc dot gnu dot org
2009-07-14 18:00 ` jakub at gcc dot gnu dot org
2009-07-15 7:32 ` [Bug middle-end/40747] " steven at gcc dot gnu dot org
2009-07-15 8:19 ` sezeroz at gmail dot com
2009-07-15 8:28 ` jakub at gcc dot gnu dot org
2009-07-15 8:30 ` jakub at gcc dot gnu dot org
2009-07-15 9:48 ` jakub at gcc dot gnu dot org
2009-07-15 10:18 ` jakub at gcc dot gnu dot org
2009-07-15 11:23 ` jakub at gcc dot gnu dot org
2009-07-15 11:26 ` jakub at gcc dot gnu dot org
2009-10-21 10:51 ` mikpe at it dot uu dot se
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