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* [Bug c++/15440] New: mainline C++ code generation bug at -O2 @ 2004-05-14 23:57 martin at mpa-garching dot mpg dot de 2004-05-15 0:04 ` [Bug c++/15440] " martin at mpa-garching dot mpg dot de ` (6 more replies) 0 siblings, 7 replies; 8+ messages in thread From: martin at mpa-garching dot mpg dot de @ 2004-05-14 23:57 UTC (permalink / raw) To: gcc-bugs The attached testcase compiles without complaints. But when compiled at -O2, running the generated executable produces a segmentation fault. This problem was present on tree-ssa but not on pre-merge mainline. Unfortunately I have failed to reduce the testcase further. ~/tmp>g++ -O2 -v bug.ii Reading specs from /afs/mpa/data/martin/ugcc/lib/gcc/i686-pc-linux-gnu/3.5.0/spe cs Configured with: /scratch/gcc/configure --quiet --prefix=/afs/mpa/data/martin/ug cc --enable-languages=c++ Thread model: posix gcc version 3.5.0 20040514 (experimental) /afs/mpa/data/martin/ugcc/libexec/gcc/i686-pc-linux-gnu/3.5.0/cc1plus -fpreproc essed bug.ii -quiet -dumpbase bug.ii -mtune=pentiumpro -auxbase bug -O2 -version -o /tmp/ccqlUGQX.s GNU C++ version 3.5.0 20040514 (experimental) (i686-pc-linux-gnu) compiled by GNU C version 3.5.0 20040514 (experimental). GGC heuristics: --param ggc-min-expand=30 --param ggc-min-heapsize=4096 as -V -Qy -o /tmp/ccmVEshX.o /tmp/ccqlUGQX.s GNU assembler version 2.14 (i686-pc-linux-gnu) using BFD version 2.14 20030612 /afs/mpa/data/martin/ugcc/libexec/gcc/i686-pc-linux-gnu/3.5.0/collect2 --eh-fra me-hdr -m elf_i386 -dynamic-linker /lib/ld-linux.so.2 /usr/lib/crt1.o /usr/lib/c rti.o /afs/mpa/data/martin/ugcc/lib/gcc/i686-pc-linux-gnu/3.5.0/crtbegin.o -L/af s/mpa/data/martin/ugcc/lib/gcc/i686-pc-linux-gnu/3.5.0 -L/afs/mpa/data/martin/ug cc/lib/gcc/i686-pc-linux-gnu/3.5.0/../../.. /tmp/ccmVEshX.o -lstdc++ -lm -lgcc_s -lgcc -lc -lgcc_s -lgcc /afs/mpa/data/martin/ugcc/lib/gcc/i686-pc-linux-gnu/3.5 .0/crtend.o /usr/lib/crtn.o ~/tmp>./a.out Segmentation fault -- Summary: mainline C++ code generation bug at -O2 Product: gcc Version: 3.5.0 Status: UNCONFIRMED Severity: normal Priority: P2 Component: c++ AssignedTo: unassigned at gcc dot gnu dot org ReportedBy: martin at mpa-garching dot mpg dot de CC: gcc-bugs at gcc dot gnu dot org,martin at mpa-garching dot mpg dot de GCC build triplet: i686-pc-linux-gnu GCC host triplet: i686-pc-linux-gnu GCC target triplet: i686-pc-linux-gnu http://gcc.gnu.org/bugzilla/show_bug.cgi?id=15440 ^ permalink raw reply [flat|nested] 8+ messages in thread
* [Bug c++/15440] mainline C++ code generation bug at -O2 2004-05-14 23:57 [Bug c++/15440] New: mainline C++ code generation bug at -O2 martin at mpa-garching dot mpg dot de @ 2004-05-15 0:04 ` martin at mpa-garching dot mpg dot de 2004-05-15 0:20 ` martin at mpa-garching dot mpg dot de ` (5 subsequent siblings) 6 siblings, 0 replies; 8+ messages in thread From: martin at mpa-garching dot mpg dot de @ 2004-05-15 0:04 UTC (permalink / raw) To: gcc-bugs ------- Additional Comments From martin at mpa-garching dot mpg dot de 2004-05-14 17:04 ------- Created an attachment (id=6289) --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=6289&action=view) testcase to reproduce the bug -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=15440 ^ permalink raw reply [flat|nested] 8+ messages in thread
* [Bug c++/15440] mainline C++ code generation bug at -O2 2004-05-14 23:57 [Bug c++/15440] New: mainline C++ code generation bug at -O2 martin at mpa-garching dot mpg dot de 2004-05-15 0:04 ` [Bug c++/15440] " martin at mpa-garching dot mpg dot de @ 2004-05-15 0:20 ` martin at mpa-garching dot mpg dot de 2004-05-15 0:20 ` martin at mpa-garching dot mpg dot de ` (4 subsequent siblings) 6 siblings, 0 replies; 8+ messages in thread From: martin at mpa-garching dot mpg dot de @ 2004-05-15 0:20 UTC (permalink / raw) To: gcc-bugs -- What |Removed |Added ---------------------------------------------------------------------------- Keywords| |wrong-code http://gcc.gnu.org/bugzilla/show_bug.cgi?id=15440 ^ permalink raw reply [flat|nested] 8+ messages in thread
* [Bug c++/15440] mainline C++ code generation bug at -O2 2004-05-14 23:57 [Bug c++/15440] New: mainline C++ code generation bug at -O2 martin at mpa-garching dot mpg dot de 2004-05-15 0:04 ` [Bug c++/15440] " martin at mpa-garching dot mpg dot de 2004-05-15 0:20 ` martin at mpa-garching dot mpg dot de @ 2004-05-15 0:20 ` martin at mpa-garching dot mpg dot de 2004-05-15 0:44 ` pinskia at gcc dot gnu dot org ` (3 subsequent siblings) 6 siblings, 0 replies; 8+ messages in thread From: martin at mpa-garching dot mpg dot de @ 2004-05-15 0:20 UTC (permalink / raw) To: gcc-bugs ------- Additional Comments From martin at mpa-garching dot mpg dot de 2004-05-14 17:12 ------- Created an attachment (id=6290) --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=6290&action=view) the un-preprocessed version of the testcase -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=15440 ^ permalink raw reply [flat|nested] 8+ messages in thread
* [Bug c++/15440] mainline C++ code generation bug at -O2 2004-05-14 23:57 [Bug c++/15440] New: mainline C++ code generation bug at -O2 martin at mpa-garching dot mpg dot de ` (2 preceding siblings ...) 2004-05-15 0:20 ` martin at mpa-garching dot mpg dot de @ 2004-05-15 0:44 ` pinskia at gcc dot gnu dot org 2004-05-15 0:50 ` martin at mpa-garching dot mpg dot de ` (2 subsequent siblings) 6 siblings, 0 replies; 8+ messages in thread From: pinskia at gcc dot gnu dot org @ 2004-05-15 0:44 UTC (permalink / raw) To: gcc-bugs ------- Additional Comments From pinskia at gcc dot gnu dot org 2004-05-14 17:17 ------- I almost think this is a dup of bug 14029. -- What |Removed |Added ---------------------------------------------------------------------------- BugsThisDependsOn| |14029 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=15440 ^ permalink raw reply [flat|nested] 8+ messages in thread
* [Bug c++/15440] mainline C++ code generation bug at -O2 2004-05-14 23:57 [Bug c++/15440] New: mainline C++ code generation bug at -O2 martin at mpa-garching dot mpg dot de ` (3 preceding siblings ...) 2004-05-15 0:44 ` pinskia at gcc dot gnu dot org @ 2004-05-15 0:50 ` martin at mpa-garching dot mpg dot de 2004-05-15 3:26 ` pinskia at gcc dot gnu dot org 2004-08-23 3:13 ` pinskia at gcc dot gnu dot org 6 siblings, 0 replies; 8+ messages in thread From: martin at mpa-garching dot mpg dot de @ 2004-05-15 0:50 UTC (permalink / raw) To: gcc-bugs ------- Additional Comments From martin at mpa-garching dot mpg dot de 2004-05-14 17:22 ------- I don't see the similarity at first glance ;) But I can confirm that the problem goes away when adding "fno-strict-aliasing" to the command line. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=15440 ^ permalink raw reply [flat|nested] 8+ messages in thread
* [Bug c++/15440] mainline C++ code generation bug at -O2 2004-05-14 23:57 [Bug c++/15440] New: mainline C++ code generation bug at -O2 martin at mpa-garching dot mpg dot de ` (4 preceding siblings ...) 2004-05-15 0:50 ` martin at mpa-garching dot mpg dot de @ 2004-05-15 3:26 ` pinskia at gcc dot gnu dot org 2004-08-23 3:13 ` pinskia at gcc dot gnu dot org 6 siblings, 0 replies; 8+ messages in thread From: pinskia at gcc dot gnu dot org @ 2004-05-15 3:26 UTC (permalink / raw) To: gcc-bugs ------- Additional Comments From pinskia at gcc dot gnu dot org 2004-05-14 17:24 ------- Then it is a dup as this is a general problem currently. *** This bug has been marked as a duplicate of 14029 *** -- What |Removed |Added ---------------------------------------------------------------------------- Status|UNCONFIRMED |RESOLVED Resolution| |DUPLICATE http://gcc.gnu.org/bugzilla/show_bug.cgi?id=15440 ^ permalink raw reply [flat|nested] 8+ messages in thread
* [Bug c++/15440] mainline C++ code generation bug at -O2 2004-05-14 23:57 [Bug c++/15440] New: mainline C++ code generation bug at -O2 martin at mpa-garching dot mpg dot de ` (5 preceding siblings ...) 2004-05-15 3:26 ` pinskia at gcc dot gnu dot org @ 2004-08-23 3:13 ` pinskia at gcc dot gnu dot org 6 siblings, 0 replies; 8+ messages in thread From: pinskia at gcc dot gnu dot org @ 2004-08-23 3:13 UTC (permalink / raw) To: gcc-bugs -- Bug 15440 depends on bug 14029, which changed state. Bug 14029 Summary: [3.5 Regression] Miscompilation of unrolled loop due to Iterator::base having an aliasing problem http://gcc.gnu.org/bugzilla/show_bug.cgi?id=14029 What |Old Value |New Value ---------------------------------------------------------------------------- Status|ASSIGNED |RESOLVED Resolution| |FIXED http://gcc.gnu.org/bugzilla/show_bug.cgi?id=15440 ^ permalink raw reply [flat|nested] 8+ messages in thread
end of thread, other threads:[~2004-08-23 3:13 UTC | newest] Thread overview: 8+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2004-05-14 23:57 [Bug c++/15440] New: mainline C++ code generation bug at -O2 martin at mpa-garching dot mpg dot de 2004-05-15 0:04 ` [Bug c++/15440] " martin at mpa-garching dot mpg dot de 2004-05-15 0:20 ` martin at mpa-garching dot mpg dot de 2004-05-15 0:20 ` martin at mpa-garching dot mpg dot de 2004-05-15 0:44 ` pinskia at gcc dot gnu dot org 2004-05-15 0:50 ` martin at mpa-garching dot mpg dot de 2004-05-15 3:26 ` pinskia at gcc dot gnu dot org 2004-08-23 3:13 ` pinskia at gcc dot gnu dot org
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