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* [Bug c/38696] New: gcc.dg/torture/pr37868.c wrong code at -O2 and above for 4.3 and trunk / bit packing
@ 2009-01-02 13:30 laurent at guerby dot net
2009-01-02 15:26 ` [Bug middle-end/38696] " pinskia at gcc dot gnu dot org
` (6 more replies)
0 siblings, 7 replies; 8+ messages in thread
From: laurent at guerby dot net @ 2009-01-02 13:30 UTC (permalink / raw)
To: gcc-bugs
GCC 4.3.2-1 debian gnueabi and trunk at rev 142984 generate wrong code at -O2
and above for pr37868.c
guerby@gcc50:~$ /home/guerby/build-142984/gcc/xgcc
-B/home/guerby/build-142984/gcc/
/home/guerby/trunk/gcc/testsuite/gcc.dg/torture/pr37868.c -O2 -lm -o
./pr37868.exeguerby@gcc50:~$ ./pr37868.exe
Aborted
guerby@gcc50:~$ cat /home/guerby/trunk/gcc/testsuite/gcc.dg/torture/pr37868.c
/* { dg-do run } */
/* { dg-options "-fno-strict-aliasing" } */
/* { dg-skip-if "unaligned access" { sparc*-*-* } "*" "" } */
extern void abort (void);
struct X {
unsigned char pad : 4;
unsigned int a : 32;
unsigned int b : 24;
unsigned int c : 6;
} __attribute__((packed));
int main (void)
{
struct X x;
unsigned int bad_bits;
x.pad = -1;
x.a = -1;
x.b = -1;
x.c = -1;
bad_bits = ((unsigned int)-1) ^ *(1+(unsigned int *) &x);
if (bad_bits != 0)
abort ();
return 0;
}
--
Summary: gcc.dg/torture/pr37868.c wrong code at -O2 and above for
4.3 and trunk / bit packing
Product: gcc
Version: 4.4.0
Status: UNCONFIRMED
Keywords: wrong-code
Severity: normal
Priority: P3
Component: c
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: laurent at guerby dot net
GCC build triplet: arm-linux-gnueabi
GCC host triplet: arm-linux-gnueabi
GCC target triplet: arm-linux-gnueabi
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38696
^ permalink raw reply [flat|nested] 8+ messages in thread
* [Bug middle-end/38696] gcc.dg/torture/pr37868.c wrong code at -O2 and above for 4.3 and trunk / bit packing
2009-01-02 13:30 [Bug c/38696] New: gcc.dg/torture/pr37868.c wrong code at -O2 and above for 4.3 and trunk / bit packing laurent at guerby dot net
@ 2009-01-02 15:26 ` pinskia at gcc dot gnu dot org
2009-01-10 13:32 ` laurent at guerby dot net
` (5 subsequent siblings)
6 siblings, 0 replies; 8+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2009-01-02 15:26 UTC (permalink / raw)
To: gcc-bugs
------- Comment #1 from pinskia at gcc dot gnu dot org 2009-01-02 15:20 -------
Most likely needs to be skipped just like sparc as this is an unaligned access.
--
pinskia at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
Component|c |middle-end
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38696
^ permalink raw reply [flat|nested] 8+ messages in thread
* [Bug middle-end/38696] gcc.dg/torture/pr37868.c wrong code at -O2 and above for 4.3 and trunk / bit packing
2009-01-02 13:30 [Bug c/38696] New: gcc.dg/torture/pr37868.c wrong code at -O2 and above for 4.3 and trunk / bit packing laurent at guerby dot net
2009-01-02 15:26 ` [Bug middle-end/38696] " pinskia at gcc dot gnu dot org
@ 2009-01-10 13:32 ` laurent at guerby dot net
2009-04-30 9:27 ` ramana at gcc dot gnu dot org
` (4 subsequent siblings)
6 siblings, 0 replies; 8+ messages in thread
From: laurent at guerby dot net @ 2009-01-10 13:32 UTC (permalink / raw)
To: gcc-bugs
------- Comment #2 from laurent at guerby dot net 2009-01-10 13:31 -------
You mean adding:
/* { dg-skip-if "unaligned access" { arm*-*-* } "*" "" } */
?
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38696
^ permalink raw reply [flat|nested] 8+ messages in thread
* [Bug middle-end/38696] gcc.dg/torture/pr37868.c wrong code at -O2 and above for 4.3 and trunk / bit packing
2009-01-02 13:30 [Bug c/38696] New: gcc.dg/torture/pr37868.c wrong code at -O2 and above for 4.3 and trunk / bit packing laurent at guerby dot net
2009-01-02 15:26 ` [Bug middle-end/38696] " pinskia at gcc dot gnu dot org
2009-01-10 13:32 ` laurent at guerby dot net
@ 2009-04-30 9:27 ` ramana at gcc dot gnu dot org
2009-04-30 10:37 ` rguenth at gcc dot gnu dot org
` (3 subsequent siblings)
6 siblings, 0 replies; 8+ messages in thread
From: ramana at gcc dot gnu dot org @ 2009-04-30 9:27 UTC (permalink / raw)
To: gcc-bugs
------- Comment #3 from ramana at gcc dot gnu dot org 2009-04-30 09:27 -------
Seems to work today on gcc50 with gcc 4.4.0 and trunk on the simulator .I don't
see these failures in recent testresults on gcc-testresults@ from the
auto-tester at gcc50.
--
ramana at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |WAITING
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38696
^ permalink raw reply [flat|nested] 8+ messages in thread
* [Bug middle-end/38696] gcc.dg/torture/pr37868.c wrong code at -O2 and above for 4.3 and trunk / bit packing
2009-01-02 13:30 [Bug c/38696] New: gcc.dg/torture/pr37868.c wrong code at -O2 and above for 4.3 and trunk / bit packing laurent at guerby dot net
` (2 preceding siblings ...)
2009-04-30 9:27 ` ramana at gcc dot gnu dot org
@ 2009-04-30 10:37 ` rguenth at gcc dot gnu dot org
2010-03-20 19:16 ` ramana at gcc dot gnu dot org
` (2 subsequent siblings)
6 siblings, 0 replies; 8+ messages in thread
From: rguenth at gcc dot gnu dot org @ 2009-04-30 10:37 UTC (permalink / raw)
To: gcc-bugs
------- Comment #4 from rguenth at gcc dot gnu dot org 2009-04-30 10:37 -------
For 4.3 try if -fno-tree-sra fixes the failures.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38696
^ permalink raw reply [flat|nested] 8+ messages in thread
* [Bug middle-end/38696] gcc.dg/torture/pr37868.c wrong code at -O2 and above for 4.3 and trunk / bit packing
2009-01-02 13:30 [Bug c/38696] New: gcc.dg/torture/pr37868.c wrong code at -O2 and above for 4.3 and trunk / bit packing laurent at guerby dot net
` (3 preceding siblings ...)
2009-04-30 10:37 ` rguenth at gcc dot gnu dot org
@ 2010-03-20 19:16 ` ramana at gcc dot gnu dot org
2010-03-20 19:26 ` laurent at guerby dot net
2010-03-20 19:33 ` ramana at gcc dot gnu dot org
6 siblings, 0 replies; 8+ messages in thread
From: ramana at gcc dot gnu dot org @ 2010-03-20 19:16 UTC (permalink / raw)
To: gcc-bugs
------- Comment #5 from ramana at gcc dot gnu dot org 2010-03-20 19:16 -------
Laurent,
Is this still a problem on 4.3 branch ?
Ramana
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38696
^ permalink raw reply [flat|nested] 8+ messages in thread
* [Bug middle-end/38696] gcc.dg/torture/pr37868.c wrong code at -O2 and above for 4.3 and trunk / bit packing
2009-01-02 13:30 [Bug c/38696] New: gcc.dg/torture/pr37868.c wrong code at -O2 and above for 4.3 and trunk / bit packing laurent at guerby dot net
` (4 preceding siblings ...)
2010-03-20 19:16 ` ramana at gcc dot gnu dot org
@ 2010-03-20 19:26 ` laurent at guerby dot net
2010-03-20 19:33 ` ramana at gcc dot gnu dot org
6 siblings, 0 replies; 8+ messages in thread
From: laurent at guerby dot net @ 2010-03-20 19:26 UTC (permalink / raw)
To: gcc-bugs
------- Comment #6 from laurent at guerby dot net 2010-03-20 19:26 -------
I haven't built 4.3 in a while, if this is fixed in 4.4 and 4.5 it's good
enough for me so feel free to close as WONTFIX for 4.3.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38696
^ permalink raw reply [flat|nested] 8+ messages in thread
* [Bug middle-end/38696] gcc.dg/torture/pr37868.c wrong code at -O2 and above for 4.3 and trunk / bit packing
2009-01-02 13:30 [Bug c/38696] New: gcc.dg/torture/pr37868.c wrong code at -O2 and above for 4.3 and trunk / bit packing laurent at guerby dot net
` (5 preceding siblings ...)
2010-03-20 19:26 ` laurent at guerby dot net
@ 2010-03-20 19:33 ` ramana at gcc dot gnu dot org
6 siblings, 0 replies; 8+ messages in thread
From: ramana at gcc dot gnu dot org @ 2010-03-20 19:33 UTC (permalink / raw)
To: gcc-bugs
------- Comment #7 from ramana at gcc dot gnu dot org 2010-03-20 19:33 -------
As per the last comment.
--
ramana at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|WAITING |RESOLVED
Resolution| |WONTFIX
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38696
^ permalink raw reply [flat|nested] 8+ messages in thread
end of thread, other threads:[~2010-03-20 19:33 UTC | newest]
Thread overview: 8+ messages (download: mbox.gz / follow: Atom feed)
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2009-01-02 13:30 [Bug c/38696] New: gcc.dg/torture/pr37868.c wrong code at -O2 and above for 4.3 and trunk / bit packing laurent at guerby dot net
2009-01-02 15:26 ` [Bug middle-end/38696] " pinskia at gcc dot gnu dot org
2009-01-10 13:32 ` laurent at guerby dot net
2009-04-30 9:27 ` ramana at gcc dot gnu dot org
2009-04-30 10:37 ` rguenth at gcc dot gnu dot org
2010-03-20 19:16 ` ramana at gcc dot gnu dot org
2010-03-20 19:26 ` laurent at guerby dot net
2010-03-20 19:33 ` ramana at gcc dot gnu dot org
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