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* [Bug c++/99375] New: Segmentation fault in code compiled with -O1 -ftree-loop-vectorize
@ 2021-03-04 2:19 Arfrever.FTA at GMail dot Com
2021-03-04 8:06 ` [Bug c++/99375] " marxin at gcc dot gnu.org
2021-03-04 10:16 ` Arfrever.FTA at GMail dot Com
0 siblings, 2 replies; 3+ messages in thread
From: Arfrever.FTA at GMail dot Com @ 2021-03-04 2:19 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99375
Bug ID: 99375
Summary: Segmentation fault in code compiled with -O1
-ftree-loop-vectorize
Product: gcc
Version: 10.2.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: Arfrever.FTA at GMail dot Com
Target Milestone: ---
For MARISA project (https://github.com/s-yata/marisa-trie), GCC 10.2.0 with at
least CXXFLAGS="-O1 -ftree-loop-vectorize" generates code which fails with
segmentation fault.
GCC 8.4.0 and 9.3.0 are not affected, so this is regression in GCC 10.2.0.
Original report: https://github.com/s-yata/marisa-trie/issues/35
Steps to reproduce problem:
$ git clone https://github.com/s-yata/marisa-trie
$ cd marisa-trie
$ autoreconf -ifv
$ export CC="x86_64-pc-linux-gnu-gcc-10.2.0"
$ export CXX="x86_64-pc-linux-gnu-g++-10.2.0"
$ export CFLAGS="-O1 -ftree-loop-vectorize"
$ export CXXFLAGS="-O1 -ftree-loop-vectorize"
$ ./configure
$ make
$ make check
...
PASS: base-test
PASS: io-test
PASS: vector-test
PASS: trie-test
../test-driver: line 109: 12541 Segmentation fault "$@" > $log_file 2>&1
FAIL: marisa-test
(MARISA does not have any dependencies besides Autotools and C++ compiler, so
reproduction should be easy.)
Failing program can be run manually in this way:
$ LD_LIBRARY_PATH="$(pwd)/lib/marisa/.libs" tests/.libs/marisa-test
marisa-test.cc:13: TestEmptyTrie(): ok
marisa-test.cc:87: TestTinyTrie(): ok
Segmentation fault
^ permalink raw reply [flat|nested] 3+ messages in thread
* [Bug c++/99375] Segmentation fault in code compiled with -O1 -ftree-loop-vectorize
2021-03-04 2:19 [Bug c++/99375] New: Segmentation fault in code compiled with -O1 -ftree-loop-vectorize Arfrever.FTA at GMail dot Com
@ 2021-03-04 8:06 ` marxin at gcc dot gnu.org
2021-03-04 10:16 ` Arfrever.FTA at GMail dot Com
1 sibling, 0 replies; 3+ messages in thread
From: marxin at gcc dot gnu.org @ 2021-03-04 8:06 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99375
Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Resolution|--- |DUPLICATE
CC| |marxin at gcc dot gnu.org
Status|UNCONFIRMED |RESOLVED
--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
Thanks for the report. It's dup of PR97236, which is fixed on gcc-10 branch.
*** This bug has been marked as a duplicate of bug 97236 ***
^ permalink raw reply [flat|nested] 3+ messages in thread
* [Bug c++/99375] Segmentation fault in code compiled with -O1 -ftree-loop-vectorize
2021-03-04 2:19 [Bug c++/99375] New: Segmentation fault in code compiled with -O1 -ftree-loop-vectorize Arfrever.FTA at GMail dot Com
2021-03-04 8:06 ` [Bug c++/99375] " marxin at gcc dot gnu.org
@ 2021-03-04 10:16 ` Arfrever.FTA at GMail dot Com
1 sibling, 0 replies; 3+ messages in thread
From: Arfrever.FTA at GMail dot Com @ 2021-03-04 10:16 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99375
--- Comment #2 from Arfrever Frehtes Taifersar Arahesis <Arfrever.FTA at GMail dot Com> ---
I confirm that backporting of GCC commit
1ab88985631dd2c5a5e3b5c0dce47cf8b6ed2f82
(https://gcc.gnu.org/g:1ab88985631dd2c5a5e3b5c0dce47cf8b6ed2f82) to GCC 10.2.0
fixes this problem (also with plain CXXFLAGS="-O3").
^ permalink raw reply [flat|nested] 3+ messages in thread
end of thread, other threads:[~2021-03-04 10:16 UTC | newest]
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2021-03-04 2:19 [Bug c++/99375] New: Segmentation fault in code compiled with -O1 -ftree-loop-vectorize Arfrever.FTA at GMail dot Com
2021-03-04 8:06 ` [Bug c++/99375] " marxin at gcc dot gnu.org
2021-03-04 10:16 ` Arfrever.FTA at GMail dot Com
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