* [Bug analyzer/107943] gcc -fanalyzer hangs in openssl curve25519.c
2022-12-01 6:10 [Bug analyzer/107943] New: gcc -fanalyzer hangs in openssl curve25519.c bernd.edlinger at hotmail dot de
@ 2022-12-01 10:11 ` marxin at gcc dot gnu.org
2022-12-01 10:52 ` bernd.edlinger at hotmail dot de
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From: marxin at gcc dot gnu.org @ 2022-12-01 10:11 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107943
Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |WAITING
Last reconfirmed| |2022-12-01
Ever confirmed|0 |1
CC| |marxin at gcc dot gnu.org
--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
Can you please provide a pre-processed source file so that I can quickly bisect
it and reduce it? Thanks.
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2022-12-01 6:10 [Bug analyzer/107943] New: gcc -fanalyzer hangs in openssl curve25519.c bernd.edlinger at hotmail dot de
2022-12-01 10:11 ` [Bug analyzer/107943] " marxin at gcc dot gnu.org
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From: bernd.edlinger at hotmail dot de @ 2022-12-01 10:52 UTC (permalink / raw)
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--- Comment #2 from Bernd Edlinger <bernd.edlinger at hotmail dot de> ---
Created attachment 53998
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=53998&action=edit
preprocessed source file
^ permalink raw reply [flat|nested] 12+ messages in thread* [Bug analyzer/107943] gcc -fanalyzer hangs in openssl curve25519.c
2022-12-01 6:10 [Bug analyzer/107943] New: gcc -fanalyzer hangs in openssl curve25519.c bernd.edlinger at hotmail dot de
2022-12-01 10:11 ` [Bug analyzer/107943] " marxin at gcc dot gnu.org
2022-12-01 10:52 ` bernd.edlinger at hotmail dot de
@ 2022-12-01 10:54 ` bernd.edlinger at hotmail dot de
2022-12-01 11:13 ` [Bug analyzer/107943] [11/12/13 Regression] gcc -fanalyzer hangs in openssl curve25519.c since r11-3840-gaf66094d03779377 marxin at gcc dot gnu.org
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From: bernd.edlinger at hotmail dot de @ 2022-12-01 10:54 UTC (permalink / raw)
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--- Comment #3 from Bernd Edlinger <bernd.edlinger at hotmail dot de> ---
this is how far I got with bisecting:
$ git bisect log
git bisect start
# good: [885f5c3d5763d46e02bd2f192765cb589b4c4fe4] Daily bump.
git bisect good 885f5c3d5763d46e02bd2f192765cb589b4c4fe4
# bad: [24b8b44ea3bc232f4fe8daf24900ccaca98e8280] Daily bump.
git bisect bad 24b8b44ea3bc232f4fe8daf24900ccaca98e8280
# good: [250f234988b6231669a720c52101d3686d645072] testsuite: Fix up
gcc.target/s390/zero-scratch-regs-1.c
git bisect good 250f234988b6231669a720c52101d3686d645072
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2022-12-01 6:10 [Bug analyzer/107943] New: gcc -fanalyzer hangs in openssl curve25519.c bernd.edlinger at hotmail dot de
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From: marxin at gcc dot gnu.org @ 2022-12-01 11:13 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107943
Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Summary|gcc -fanalyzer hangs in |[11/12/13 Regression] gcc
|openssl curve25519.c |-fanalyzer hangs in openssl
| |curve25519.c since
| |r11-3840-gaf66094d03779377
Status|WAITING |NEW
Keywords| |needs-reduction
--- Comment #4 from Martin Liška <marxin at gcc dot gnu.org> ---
Started with r11-3840-gaf66094d03779377.
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2022-12-01 6:10 [Bug analyzer/107943] New: gcc -fanalyzer hangs in openssl curve25519.c bernd.edlinger at hotmail dot de
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2022-12-01 11:13 ` [Bug analyzer/107943] [11/12/13 Regression] gcc -fanalyzer hangs in openssl curve25519.c since r11-3840-gaf66094d03779377 marxin at gcc dot gnu.org
@ 2022-12-01 14:10 ` marxin at gcc dot gnu.org
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From: marxin at gcc dot gnu.org @ 2022-12-01 14:10 UTC (permalink / raw)
To: gcc-bugs
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--- Comment #5 from Martin Liška <marxin at gcc dot gnu.org> ---
Created attachment 54000
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=54000&action=edit
Partially reduced test-case
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2022-12-01 6:10 [Bug analyzer/107943] New: gcc -fanalyzer hangs in openssl curve25519.c bernd.edlinger at hotmail dot de
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2022-12-01 14:10 ` marxin at gcc dot gnu.org
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From: bernd.edlinger at hotmail dot de @ 2022-12-05 4:56 UTC (permalink / raw)
To: gcc-bugs
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--- Comment #6 from Bernd Edlinger <bernd.edlinger at hotmail dot de> ---
I don't know if that is relevant or not,
but I was using a slighthly different criterion in bisection.
I used .../configure --prefix=... --enable-languages=all
and defined the bad criterion using the unreduced test case
compilation took >10 minutes on Intel(R) Core(TM) i7-7700 CPU @ 3.60GHz
The original test case is available as follows:
$ wget https://www.openssl.org/source/openssl-1.1.1s.tar.gz
$ tar xf openssl-1.1.1s.tar.gz
$ ./config -fanalyzer
$ make
With this pointed to a different commit:
r12-7615-gc5288df751f
Author: Roger Sayle <roger@nextmovesoftware.com>
Date: Fri Mar 11 17:46:50 2022 +0000
PR tree-optimization/98335: Improvements to DSE's compute_trims.
This patch is the main middle-end piece of a fix for PR tree-opt/98335,
which is a code-quality regression affecting mainline. The issue occurs
in DSE's (dead store elimination's) compute_trims function that determines
where a store to memory can be trimmed. In the testcase given in the
PR, this function notices that the first byte of a DImode store is dead,
and replaces the 8-byte store at (aligned) offset zero, with a 7-byte store
at (unaligned) offset one. Most architectures can store a power-of-two
bytes (up to a maximum) in single instruction, so writing 7 bytes requires
more instructions than writing 8 bytes. This patch follows Jakub Jelinek's
suggestion in comment 5, that compute_trims needs improved heuristics.
beginning with this version the original test case, enters
a steady state after 2 minutes (observed with top:
VIRT=196296 RES=170872 SHR=21992 %CPU=100,0) and has no
progress for at least 20 hours, before I killed it.
The reduced test case does not exhibit this behaviour,
and runs just for some seconds.
But I agree that the r11-3840-gaf66094d03779377 is also special
and made the compile time raise from 0 to 2-10 minutes, however
I would not have opened this issue for that, since I was believing
there is something expensive to check that just did not give
a result in the end.
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2022-12-01 6:10 [Bug analyzer/107943] New: gcc -fanalyzer hangs in openssl curve25519.c bernd.edlinger at hotmail dot de
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From: rguenth at gcc dot gnu.org @ 2023-01-13 10:22 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107943
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|--- |11.4
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2022-12-01 6:10 [Bug analyzer/107943] New: gcc -fanalyzer hangs in openssl curve25519.c bernd.edlinger at hotmail dot de
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From: rguenth at gcc dot gnu.org @ 2023-03-30 10:16 UTC (permalink / raw)
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--- Comment #7 from Richard Biener <rguenth at gcc dot gnu.org> ---
Samples: 193K of event 'cycles', Event count (approx.): 206254655627
Overhead Samples Command Shared Object Symbol
12.11% 23476 cc1 cc1 [.]
ana::store_manager::get_concrete_binding
9.71% 18828 cc1 cc1 [.]
hash_table<hash_map<ana::concrete_binding, ana::concrete_binding*,
simple_hashmap_traits<default_hash_traits<ana::concrete_binding>,
ana::concrete_binding*> >::hash_entry, false, xcallocator>::find_with_hash
6.73% 13045 cc1 cc1 [.]
hash_table<hash_map<ana::binding_key const*, ana::svalue const*,
simple_hashmap_traits<default_hash_traits<ana::binding_key const*>, ana::svalue
const*> >::hash_entry, false, xcallocator>::find_slot_with_hash
5.64% 10937 cc1 libc-2.31.so [.] _int_malloc
5.20% 10087 cc1 cc1 [.]
ana::region_model_manager::get_or_create_constant_svalue
5.06% 9815 cc1 libc-2.31.so [.] _int_free
4.84% 9380 cc1 cc1 [.]
hash_table<hash_map<ana::binding_key const*, ana::svalue const*,
simple_hashmap_traits<default_hash_traits<ana::binding_key const*>, ana::svalue
const*> >::hash_entry, false, xcallocator>::expand
4.63% 8971 cc1 cc1 [.]
hash_table<hash_map<ana::element_region::key_t, ana::element_region*,
simple_hashmap_traits<default_hash_traits<ana::element_region::key_t>,
ana::element_region*> >::hash_entry, false, xcallocator>::find_with_hash
4.59% 8886 cc1 cc1 [.] iterative_hash
3.30% 6396 cc1 cc1 [.]
ana::binding_cluster::bind_compound_sval
2.58% 4995 cc1 cc1 [.] ana::store::~store
2.19% 4250 cc1 cc1 [.]
hash_table<hash_map<ana::binding_key const*, ana::svalue const*,
simple_hashmap_traits<default_hash_traits<ana::binding_key const*>, ana::svalue
const*> >::hash_entry, false, xcallocator>::find_with_hash
looks like for larger workloads it gets memory bound - optimizing data
structures (and hash functions?) might be helpful.
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2022-12-01 6:10 [Bug analyzer/107943] New: gcc -fanalyzer hangs in openssl curve25519.c bernd.edlinger at hotmail dot de
` (7 preceding siblings ...)
2023-03-30 10:16 ` rguenth at gcc dot gnu.org
@ 2023-03-30 11:01 ` rguenth at gcc dot gnu.org
2023-04-14 4:48 ` law at gcc dot gnu.org
2023-05-29 10:07 ` [Bug analyzer/107943] [11/12/13/14 " jakub at gcc dot gnu.org
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From: rguenth at gcc dot gnu.org @ 2023-03-30 11:01 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107943
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Last reconfirmed|2022-12-01 00:00:00 |2023-3-30
Known to fail| |13.0
--- Comment #8 from Richard Biener <rguenth at gcc dot gnu.org> ---
Re-confirmed on trunk btw. I killed cc1 after 55min (release checking build)
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2022-12-01 6:10 [Bug analyzer/107943] New: gcc -fanalyzer hangs in openssl curve25519.c bernd.edlinger at hotmail dot de
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2023-05-29 10:07 ` [Bug analyzer/107943] [11/12/13/14 " jakub at gcc dot gnu.org
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From: law at gcc dot gnu.org @ 2023-04-14 4:48 UTC (permalink / raw)
To: gcc-bugs
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Jeffrey A. Law <law at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |law at gcc dot gnu.org
Priority|P3 |P2
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From: jakub at gcc dot gnu.org @ 2023-05-29 10:07 UTC (permalink / raw)
To: gcc-bugs
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|11.4 |11.5
--- Comment #9 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
GCC 11.4 is being released, retargeting bugs to GCC 11.5.
^ permalink raw reply [flat|nested] 12+ messages in thread