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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
[parent not found: <bug-21804-10723@http.gcc.gnu.org/bugzilla/>]
* [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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