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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) -- links below jump to the message on this page -- 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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