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* [Bug target/106577] New: [13 Regression] during RTL pass: subreg3 ICE: in extract_insn, at recog.cc:2791 (unrecognizable insn) with -O -mavx
@ 2022-08-10 11:29 zsojka at seznam dot cz
2022-08-10 11:31 ` [Bug target/106577] [13 Regression] during RTL pass: subreg3 ICE: in extract_insn, at recog.cc:2791 (unrecognizable insn) with -O -mavx since r13-2006-ga56c1641e9d25e46 marxin at gcc dot gnu.org
` (6 more replies)
0 siblings, 7 replies; 8+ messages in thread
From: zsojka at seznam dot cz @ 2022-08-10 11:29 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106577
Bug ID: 106577
Summary: [13 Regression] during RTL pass: subreg3 ICE: in
extract_insn, at recog.cc:2791 (unrecognizable insn)
with -O -mavx
Product: gcc
Version: 13.0
Status: UNCONFIRMED
Keywords: ice-on-valid-code
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: zsojka at seznam dot cz
Target Milestone: ---
Host: x86_64-pc-linux-gnu
Target: x86_64-pc-linux-gnu
Created attachment 53429
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=53429&action=edit
reduced testcase
Compiler output:
$ x86_64-pc-linux-gnu-gcc -O -mavx testcase.c
testcase.c: In function 'foo':
testcase.c:4:1: error: unrecognizable insn:
4 | }
| ^
(insn 28 27 30 2 (parallel [
(set (reg:TI 98)
(and:TI (reg:V4SI 100)
(reg:TI 99)))
(clobber (reg:CC 17 flags))
]) "testcase.c":3:8 -1
(nil))
during RTL pass: subreg3
testcase.c:4:1: internal compiler error: in extract_insn, at recog.cc:2791
0x77b2c8 _fatal_insn(char const*, rtx_def const*, char const*, int, char
const*)
/repo/gcc-trunk/gcc/rtl-error.cc:108
0x77b34b _fatal_insn_not_found(rtx_def const*, char const*, int, char const*)
/repo/gcc-trunk/gcc/rtl-error.cc:116
0x769bfd extract_insn(rtx_insn*)
/repo/gcc-trunk/gcc/recog.cc:2791
0x24ab7b7 decompose_multiword_subregs
/repo/gcc-trunk/gcc/lower-subreg.cc:1555
0x24ac8dd execute
/repo/gcc-trunk/gcc/lower-subreg.cc:1820
Please submit a full bug report, with preprocessed source (by using
-freport-bug).
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
$ x86_64-pc-linux-gnu-gcc -v
Using built-in specs.
COLLECT_GCC=/repo/gcc-trunk/binary-latest-amd64/bin/x86_64-pc-linux-gnu-gcc
COLLECT_LTO_WRAPPER=/repo/gcc-trunk/binary-trunk-r13-2009-20220810070724-gc16d9f78dc8-checking-yes-rtl-df-extra-nobootstrap-amd64/bin/../libexec/gcc/x86_64-pc-linux-gnu/13.0.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: /repo/gcc-trunk//configure --enable-languages=c,c++
--enable-valgrind-annotations --disable-nls --enable-checking=yes,rtl,df,extra
--disable-bootstrap --with-cloog --with-ppl --with-isl
--build=x86_64-pc-linux-gnu --host=x86_64-pc-linux-gnu
--target=x86_64-pc-linux-gnu --with-ld=/usr/bin/x86_64-pc-linux-gnu-ld
--with-as=/usr/bin/x86_64-pc-linux-gnu-as --disable-libstdcxx-pch
--prefix=/repo/gcc-trunk//binary-trunk-r13-2009-20220810070724-gc16d9f78dc8-checking-yes-rtl-df-extra-nobootstrap-amd64
Thread model: posix
Supported LTO compression algorithms: zlib zstd
gcc version 13.0.0 20220810 (experimental) (GCC)
^ permalink raw reply [flat|nested] 8+ messages in thread
* [Bug target/106577] [13 Regression] during RTL pass: subreg3 ICE: in extract_insn, at recog.cc:2791 (unrecognizable insn) with -O -mavx since r13-2006-ga56c1641e9d25e46
2022-08-10 11:29 [Bug target/106577] New: [13 Regression] during RTL pass: subreg3 ICE: in extract_insn, at recog.cc:2791 (unrecognizable insn) with -O -mavx zsojka at seznam dot cz
@ 2022-08-10 11:31 ` marxin at gcc dot gnu.org
2022-08-10 13:11 ` rguenth at gcc dot gnu.org
` (5 subsequent siblings)
6 siblings, 0 replies; 8+ messages in thread
From: marxin at gcc dot gnu.org @ 2022-08-10 11:31 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106577
Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Summary|[13 Regression] during RTL |[13 Regression] during RTL
|pass: subreg3 ICE: in |pass: subreg3 ICE: in
|extract_insn, at |extract_insn, at
|recog.cc:2791 |recog.cc:2791
|(unrecognizable insn) with |(unrecognizable insn) with
|-O -mavx |-O -mavx since
| |r13-2006-ga56c1641e9d25e46
Last reconfirmed| |2022-08-10
Ever confirmed|0 |1
CC| |marxin at gcc dot gnu.org,
| |sayle at gcc dot gnu.org
--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
Started with r13-2006-ga56c1641e9d25e46.
^ permalink raw reply [flat|nested] 8+ messages in thread
* [Bug target/106577] [13 Regression] during RTL pass: subreg3 ICE: in extract_insn, at recog.cc:2791 (unrecognizable insn) with -O -mavx since r13-2006-ga56c1641e9d25e46
2022-08-10 11:29 [Bug target/106577] New: [13 Regression] during RTL pass: subreg3 ICE: in extract_insn, at recog.cc:2791 (unrecognizable insn) with -O -mavx zsojka at seznam dot cz
2022-08-10 11:31 ` [Bug target/106577] [13 Regression] during RTL pass: subreg3 ICE: in extract_insn, at recog.cc:2791 (unrecognizable insn) with -O -mavx since r13-2006-ga56c1641e9d25e46 marxin at gcc dot gnu.org
@ 2022-08-10 13:11 ` rguenth at gcc dot gnu.org
2022-08-11 7:41 ` roger at nextmovesoftware dot com
` (4 subsequent siblings)
6 siblings, 0 replies; 8+ messages in thread
From: rguenth at gcc dot gnu.org @ 2022-08-10 13:11 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106577
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|--- |13.0
^ permalink raw reply [flat|nested] 8+ messages in thread
* [Bug target/106577] [13 Regression] during RTL pass: subreg3 ICE: in extract_insn, at recog.cc:2791 (unrecognizable insn) with -O -mavx since r13-2006-ga56c1641e9d25e46
2022-08-10 11:29 [Bug target/106577] New: [13 Regression] during RTL pass: subreg3 ICE: in extract_insn, at recog.cc:2791 (unrecognizable insn) with -O -mavx zsojka at seznam dot cz
2022-08-10 11:31 ` [Bug target/106577] [13 Regression] during RTL pass: subreg3 ICE: in extract_insn, at recog.cc:2791 (unrecognizable insn) with -O -mavx since r13-2006-ga56c1641e9d25e46 marxin at gcc dot gnu.org
2022-08-10 13:11 ` rguenth at gcc dot gnu.org
@ 2022-08-11 7:41 ` roger at nextmovesoftware dot com
2022-08-14 6:34 ` roger at nextmovesoftware dot com
` (3 subsequent siblings)
6 siblings, 0 replies; 8+ messages in thread
From: roger at nextmovesoftware dot com @ 2022-08-11 7:41 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106577
Roger Sayle <roger at nextmovesoftware dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |roger at nextmovesoftware dot com
--- Comment #2 from Roger Sayle <roger at nextmovesoftware dot com> ---
I'm bootstrapping and regression testing a fix/workaround, but I'll not assign
this bug to myself (yet) as the maintainers might not like my (hacky) solution.
The problem is that calling "force_reg" may sometimes (on some targets)
clobber recog_data.operands, so it's not universally safe to call it from
within a pre-reload splitter(!?).
^ permalink raw reply [flat|nested] 8+ messages in thread
* [Bug target/106577] [13 Regression] during RTL pass: subreg3 ICE: in extract_insn, at recog.cc:2791 (unrecognizable insn) with -O -mavx since r13-2006-ga56c1641e9d25e46
2022-08-10 11:29 [Bug target/106577] New: [13 Regression] during RTL pass: subreg3 ICE: in extract_insn, at recog.cc:2791 (unrecognizable insn) with -O -mavx zsojka at seznam dot cz
` (2 preceding siblings ...)
2022-08-11 7:41 ` roger at nextmovesoftware dot com
@ 2022-08-14 6:34 ` roger at nextmovesoftware dot com
2022-10-19 10:43 ` rguenth at gcc dot gnu.org
` (2 subsequent siblings)
6 siblings, 0 replies; 8+ messages in thread
From: roger at nextmovesoftware dot com @ 2022-08-14 6:34 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106577
--- Comment #3 from Roger Sayle <roger at nextmovesoftware dot com> ---
Patch proposed:
https://gcc.gnu.org/pipermail/gcc-patches/2022-August/599663.html
^ permalink raw reply [flat|nested] 8+ messages in thread
* [Bug target/106577] [13 Regression] during RTL pass: subreg3 ICE: in extract_insn, at recog.cc:2791 (unrecognizable insn) with -O -mavx since r13-2006-ga56c1641e9d25e46
2022-08-10 11:29 [Bug target/106577] New: [13 Regression] during RTL pass: subreg3 ICE: in extract_insn, at recog.cc:2791 (unrecognizable insn) with -O -mavx zsojka at seznam dot cz
` (3 preceding siblings ...)
2022-08-14 6:34 ` roger at nextmovesoftware dot com
@ 2022-10-19 10:43 ` rguenth at gcc dot gnu.org
2022-12-02 10:09 ` cvs-commit at gcc dot gnu.org
2022-12-02 10:20 ` jakub at gcc dot gnu.org
6 siblings, 0 replies; 8+ messages in thread
From: rguenth at gcc dot gnu.org @ 2022-10-19 10:43 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106577
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P1
^ permalink raw reply [flat|nested] 8+ messages in thread
* [Bug target/106577] [13 Regression] during RTL pass: subreg3 ICE: in extract_insn, at recog.cc:2791 (unrecognizable insn) with -O -mavx since r13-2006-ga56c1641e9d25e46
2022-08-10 11:29 [Bug target/106577] New: [13 Regression] during RTL pass: subreg3 ICE: in extract_insn, at recog.cc:2791 (unrecognizable insn) with -O -mavx zsojka at seznam dot cz
` (4 preceding siblings ...)
2022-10-19 10:43 ` rguenth at gcc dot gnu.org
@ 2022-12-02 10:09 ` cvs-commit at gcc dot gnu.org
2022-12-02 10:20 ` jakub at gcc dot gnu.org
6 siblings, 0 replies; 8+ messages in thread
From: cvs-commit at gcc dot gnu.org @ 2022-12-02 10:09 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106577
--- Comment #4 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Jakub Jelinek <jakub@gcc.gnu.org>:
https://gcc.gnu.org/g:b3237a2c6847993f92218b65f96ece9831a8bfb0
commit r13-4462-gb3237a2c6847993f92218b65f96ece9831a8bfb0
Author: Jakub Jelinek <jakub@redhat.com>
Date: Fri Dec 2 11:08:45 2022 +0100
i386: Save/restore recog_data in ix86_vector_duplicate_value [PR106577]
On Tue, Aug 16, 2022 at 09:14:06AM +0100, Richard Sandiford via Gcc-patches
wrote:
> IMO the correct low-effort fix is to save and restore recog_data
> in ix86_vector_duplicate_value. It's a relatively big copy,
> but the current code is pretty wasteful anyway (allocating at
> least a new SET and INSN for every query). Compared to the
> overhead of doing that, a copy to and from the stack shouldn't
> be too bad.
The following patch does that.
It isn't the first spot in the compiler that does that, not even the first
spot in the i386 backend.
In i386-expand.cc beyond these 2 recog_memoized calls there is one in
expand_vselect, but I think it is unlikely we'd run into these issues
trying
to expand new permutations from splitters.
2022-12-02 Jakub Jelinek <jakub@redhat.com>
PR target/106577
* config/i386/i386-expand.cc (ix86_vector_duplicate_value):
Save/restore
recog_data around recog_memoized calls.
* gcc.target/i386/pr106577.c: New test.
^ permalink raw reply [flat|nested] 8+ messages in thread
* [Bug target/106577] [13 Regression] during RTL pass: subreg3 ICE: in extract_insn, at recog.cc:2791 (unrecognizable insn) with -O -mavx since r13-2006-ga56c1641e9d25e46
2022-08-10 11:29 [Bug target/106577] New: [13 Regression] during RTL pass: subreg3 ICE: in extract_insn, at recog.cc:2791 (unrecognizable insn) with -O -mavx zsojka at seznam dot cz
` (5 preceding siblings ...)
2022-12-02 10:09 ` cvs-commit at gcc dot gnu.org
@ 2022-12-02 10:20 ` jakub at gcc dot gnu.org
6 siblings, 0 replies; 8+ messages in thread
From: jakub at gcc dot gnu.org @ 2022-12-02 10:20 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106577
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jakub at gcc dot gnu.org
Status|NEW |RESOLVED
Resolution|--- |FIXED
--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed.
^ permalink raw reply [flat|nested] 8+ messages in thread
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2022-08-10 11:29 [Bug target/106577] New: [13 Regression] during RTL pass: subreg3 ICE: in extract_insn, at recog.cc:2791 (unrecognizable insn) with -O -mavx zsojka at seznam dot cz
2022-08-10 11:31 ` [Bug target/106577] [13 Regression] during RTL pass: subreg3 ICE: in extract_insn, at recog.cc:2791 (unrecognizable insn) with -O -mavx since r13-2006-ga56c1641e9d25e46 marxin at gcc dot gnu.org
2022-08-10 13:11 ` rguenth at gcc dot gnu.org
2022-08-11 7:41 ` roger at nextmovesoftware dot com
2022-08-14 6:34 ` roger at nextmovesoftware dot com
2022-10-19 10:43 ` rguenth at gcc dot gnu.org
2022-12-02 10:09 ` cvs-commit at gcc dot gnu.org
2022-12-02 10:20 ` jakub at gcc dot gnu.org
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