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* [Bug c/21804] New: gcc generates incorrect code on x86_64 with -O2
@ 2005-05-29 3:22 rick-gcc at frob dot com dot au
2005-05-29 4:07 ` [Bug c/21804] " rick-gcc at frob dot com dot au
` (2 more replies)
0 siblings, 3 replies; 5+ messages in thread
From: rick-gcc at frob dot com dot au @ 2005-05-29 3:22 UTC (permalink / raw)
To: gcc-bugs
The source file has the line
if (gethostname(host,sizeof host) == -1) return -1;
Compiled without optimization:
$ ~/gcc34x/bin/gcc -S -c -o - x.i | grep -A2 hostname
call gethostname
cmpl $-1, %eax
jne .L46
Compiled with -O2:
call gethostname
movl $-1, %eax
cmpl %eax, %eax
je .L83
Same results for gcc-3.4.3, gcc-3.4.4, gcc-3.4-20050524. gcc-4.0.0
and gcc-4.1-20050522 create correct code.
Reading specs from
/home/rick/gcc34x/bin/../lib/gcc/x86_64-unknown-linux-gnu/3.4.5/specs
Configured with: ./configure --prefix=/home/rick/gcc34x/
Thread model: posix
gcc version 3.4.5 20050524 (prerelease)
/home/rick/gcc34x/bin/../libexec/gcc/x86_64-unknown-linux-gnu/3.4.5/cc1
-fpreprocessed x.i -quiet -dumpbase x.i -mtune=k8 -auxbase-strip /dev/null
-version -o /dev/null
GNU C version 3.4.5 20050524 (prerelease) (x86_64-unknown-linux-gnu)
compiled by GNU C version 3.4.3 20041212 (Red Hat 3.4.3-9.EL4).
GGC heuristics: --param ggc-min-expand=94 --param ggc-min-heapsize=120284
--
Summary: gcc generates incorrect code on x86_64 with -O2
Product: gcc
Version: 3.4.5
Status: UNCONFIRMED
Severity: normal
Priority: P2
Component: c
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: rick-gcc at frob dot com dot au
CC: gcc-bugs at gcc dot gnu dot org
GCC build triplet: x86_64-unknown-linux-gnu
GCC host triplet: x86_64-unknown-linux-gnu
GCC target triplet: x86_64-unknown-linux-gnu
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21804
^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug c/21804] gcc generates incorrect code on x86_64 with -O2
2005-05-29 3:22 [Bug c/21804] New: gcc generates incorrect code on x86_64 with -O2 rick-gcc at frob dot com dot au
@ 2005-05-29 4:07 ` rick-gcc at frob dot com dot au
2005-05-29 6:47 ` [Bug rtl-optimization/21804] " pinskia at gcc dot gnu dot org
2005-06-19 13:57 ` [Bug rtl-optimization/21804] [3.4 only] " pinskia at gcc dot gnu dot org
2 siblings, 0 replies; 5+ messages in thread
From: rick-gcc at frob dot com dot au @ 2005-05-29 4:07 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From rick-gcc at frob dot com dot au 2005-05-29 03:22 -------
Created an attachment (id=8985)
--> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=8985&action=view)
Preprocessed source file
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21804
^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug rtl-optimization/21804] gcc generates incorrect code on x86_64 with -O2
2005-05-29 3:22 [Bug c/21804] New: gcc generates incorrect code on x86_64 with -O2 rick-gcc at frob dot com dot au
2005-05-29 4:07 ` [Bug c/21804] " rick-gcc at frob dot com dot au
@ 2005-05-29 6:47 ` pinskia at gcc dot gnu dot org
2005-06-19 13:57 ` [Bug rtl-optimization/21804] [3.4 only] " pinskia at gcc dot gnu dot org
2 siblings, 0 replies; 5+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2005-05-29 6:47 UTC (permalink / raw)
To: gcc-bugs
--
What |Removed |Added
----------------------------------------------------------------------------
Component|c |rtl-optimization
Keywords| |wrong-code
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21804
^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug rtl-optimization/21804] [3.4 only] gcc generates incorrect code on x86_64 with -O2
2005-05-29 3:22 [Bug c/21804] New: gcc generates incorrect code on x86_64 with -O2 rick-gcc at frob dot com dot au
2005-05-29 4:07 ` [Bug c/21804] " rick-gcc at frob dot com dot au
2005-05-29 6:47 ` [Bug rtl-optimization/21804] " pinskia at gcc dot gnu dot org
@ 2005-06-19 13:57 ` pinskia at gcc dot gnu dot org
2 siblings, 0 replies; 5+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2005-06-19 13:57 UTC (permalink / raw)
To: gcc-bugs
--
What |Removed |Added
----------------------------------------------------------------------------
GCC build triplet|x86_64-unknown-linux-gnu |
GCC host triplet|x86_64-unknown-linux-gnu |
GCC target triplet|x86_64-unknown-linux-gnu |x86_64-linux-gnu
Summary|gcc generates incorrect code|[3.4 only] gcc generates
|on x86_64 with -O2 |incorrect code on x86_64
| |with -O2
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21804
^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug rtl-optimization/21804] [3.4 only] gcc generates incorrect code on x86_64 with -O2
[not found] <bug-21804-10723@http.gcc.gnu.org/bugzilla/>
@ 2005-10-27 16:40 ` pinskia at gcc dot gnu dot org
0 siblings, 0 replies; 5+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2005-10-27 16:40 UTC (permalink / raw)
To: gcc-bugs
------- Comment #2 from pinskia at gcc dot gnu dot org 2005-10-27 16:40 -------
Closing as fixed for 4.0.0.
--
pinskia at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution| |FIXED
Target Milestone|--- |4.0.0
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21804
^ permalink raw reply [flat|nested] 5+ messages in thread
end of thread, other threads:[~2005-10-27 16:40 UTC | newest]
Thread overview: 5+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2005-05-29 3:22 [Bug c/21804] New: gcc generates incorrect code on x86_64 with -O2 rick-gcc at frob dot com dot au
2005-05-29 4:07 ` [Bug c/21804] " rick-gcc at frob dot com dot au
2005-05-29 6:47 ` [Bug rtl-optimization/21804] " pinskia at gcc dot gnu dot org
2005-06-19 13:57 ` [Bug rtl-optimization/21804] [3.4 only] " pinskia at gcc dot gnu dot org
[not found] <bug-21804-10723@http.gcc.gnu.org/bugzilla/>
2005-10-27 16:40 ` pinskia at gcc dot gnu dot org
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