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* [Bug rtl-optimization/104961] New: compilation never (?) finishes at -Og
@ 2022-03-16 21:29 zsojka at seznam dot cz
2022-03-16 21:37 ` [Bug rtl-optimization/104961] [9/10/11/12 Regression] " mpolacek at gcc dot gnu.org
` (6 more replies)
0 siblings, 7 replies; 8+ messages in thread
From: zsojka at seznam dot cz @ 2022-03-16 21:29 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104961
Bug ID: 104961
Summary: compilation never (?) finishes at -Og
Product: gcc
Version: 12.0
Status: UNCONFIRMED
Keywords: compile-time-hog, memory-hog
Severity: normal
Priority: P3
Component: rtl-optimization
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 52638
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=52638&action=edit
reduced testcase
Compiler output:
$ time x86_64-pc-linux-gnu-gcc -O testcase.c -c
real 0m0.034s
user 0m0.028s
sys 0m0.007s
$ time x86_64-pc-linux-gnu-gcc -Og testcase.c -c
^C
real 2m5.070s
user 0m0.001s
sys 0m0.000s
The compilation doesn't seem to ever finish. The cc1 binary is just eating more
memory over time.
$ 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-r12-7654-20220315102422-gda24fce323e-checking-yes-rtl-df-extra-nobootstrap-amd64/bin/../libexec/gcc/x86_64-pc-linux-gnu/12.0.1/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-r12-7654-20220315102422-gda24fce323e-checking-yes-rtl-df-extra-nobootstrap-amd64
Thread model: posix
Supported LTO compression algorithms: zlib zstd
gcc version 12.0.1 20220315 (experimental) (GCC)
^ permalink raw reply [flat|nested] 8+ messages in thread
* [Bug rtl-optimization/104961] [9/10/11/12 Regression] compilation never (?) finishes at -Og
2022-03-16 21:29 [Bug rtl-optimization/104961] New: compilation never (?) finishes at -Og zsojka at seznam dot cz
@ 2022-03-16 21:37 ` mpolacek at gcc dot gnu.org
2022-03-17 16:20 ` vmakarov at gcc dot gnu.org
` (5 subsequent siblings)
6 siblings, 0 replies; 8+ messages in thread
From: mpolacek at gcc dot gnu.org @ 2022-03-16 21:37 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104961
Marek Polacek <mpolacek at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Ever confirmed|0 |1
Last reconfirmed| |2022-03-16
Priority|P3 |P2
CC| |mpolacek at gcc dot gnu.org
Target Milestone|--- |9.5
Summary|compilation never (?) |[9/10/11/12 Regression]
|finishes at -Og |compilation never (?)
| |finishes at -Og
Status|UNCONFIRMED |NEW
--- Comment #1 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Confirmed. Started with
commit 7293e3f58edb7535d826c85160b9fa6d4132ffea
Author: Vladimir Makarov <vmakarov@redhat.com>
Date: Fri Mar 16 18:48:26 2018 +0000
re PR target/84876 (ICE on invalid code in lra_assign at
gcc/lra-assigns.c:1601 since r258504)
2018-03-16 Vladimir Makarov <vmakarov@redhat.com>
PR target/84876
* lra-assigns.c (lra_split_hard_reg_for): Don't use
regno_allocno_class_array and sorted_pseudos.
* lra-constraints.c (spill_hard_reg_in_range): Ignore hard regs in
insns where regno is used.
2018-03-16 Vladimir Makarov <vmakarov@redhat.com>
PR target/84876
* gcc.target/i386/pr84876.c: New test.
From-SVN: r258602
which fixed an ICE:
/home/mpolacek/q.c: In function ‘foo’:
/home/mpolacek/q.c:12:1: error: unable to find a register to spill
}
^
/home/mpolacek/q.c:12:1: error: this is the insn:
(insn 15 32 33 2 (parallel [
(set (reg/v:TI 105 [orig:91 j ] [91])
(mult:TI (zero_extend:TI (subreg/j:DI (reg/v:TI 105 [orig:91 j
] [91]) 0))
(zero_extend:TI (reg:DI 102 [ i.0_1 ]))))
(clobber (reg:CC 17 flags))
]) "/home/mpolacek/q.c":8 356 {*umulditi3_1}
(expr_list:REG_DEAD (reg:DI 102 [ i.0_1 ])
(expr_list:REG_UNUSED (reg:CC 17 flags)
(nil))))
during RTL pass: reload
/home/mpolacek/q.c:12:1: internal compiler error: in lra_split_hard_reg_for, at
lra-assigns.c:1805
unrecognized DWARF version in .debug_info at 6
0xf1752d _fatal_insn(char const*, rtx_def const*, char const*, int, char
const*)
../../gcc/rtl-error.c:108
0xd773ae lra_split_hard_reg_for()
../../gcc/lra-assigns.c:1805
0xd6fcb8 lra(_IO_FILE*)
../../gcc/lra.c:2507
0xd17143 do_reload
../../gcc/ira.c:5465
0xd17636 execute
../../gcc/ira.c:5649
Compiled fine with GCC 5 -> regression.
^ permalink raw reply [flat|nested] 8+ messages in thread
* [Bug rtl-optimization/104961] [9/10/11/12 Regression] compilation never (?) finishes at -Og
2022-03-16 21:29 [Bug rtl-optimization/104961] New: compilation never (?) finishes at -Og zsojka at seznam dot cz
2022-03-16 21:37 ` [Bug rtl-optimization/104961] [9/10/11/12 Regression] " mpolacek at gcc dot gnu.org
@ 2022-03-17 16:20 ` vmakarov at gcc dot gnu.org
2022-03-18 18:25 ` cvs-commit at gcc dot gnu.org
` (4 subsequent siblings)
6 siblings, 0 replies; 8+ messages in thread
From: vmakarov at gcc dot gnu.org @ 2022-03-17 16:20 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104961
--- Comment #2 from Vladimir Makarov <vmakarov at gcc dot gnu.org> ---
I've reproduced the bug. The mentioned patch is not the cause but a trigger.
The origin of the problem is actually a removal of hard reg propagation before
RA which happened about year ago.
I hope the fix will be ready on Friday or Monday.
^ permalink raw reply [flat|nested] 8+ messages in thread
* [Bug rtl-optimization/104961] [9/10/11/12 Regression] compilation never (?) finishes at -Og
2022-03-16 21:29 [Bug rtl-optimization/104961] New: compilation never (?) finishes at -Og zsojka at seznam dot cz
2022-03-16 21:37 ` [Bug rtl-optimization/104961] [9/10/11/12 Regression] " mpolacek at gcc dot gnu.org
2022-03-17 16:20 ` vmakarov at gcc dot gnu.org
@ 2022-03-18 18:25 ` cvs-commit at gcc dot gnu.org
2022-03-19 7:54 ` [Bug rtl-optimization/104961] [9/10/11 " jakub at gcc dot gnu.org
` (3 subsequent siblings)
6 siblings, 0 replies; 8+ messages in thread
From: cvs-commit at gcc dot gnu.org @ 2022-03-18 18:25 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104961
--- Comment #3 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Vladimir Makarov <vmakarov@gcc.gnu.org>:
https://gcc.gnu.org/g:0c016888ffd569c4b70722cf7df2efcc003f397b
commit r12-7716-g0c016888ffd569c4b70722cf7df2efcc003f397b
Author: Vladimir N. Makarov <vmakarov@redhat.com>
Date: Fri Mar 18 14:23:40 2022 -0400
[PR104961] LRA: split hard reg for reload pseudo with clobber.
Splitting hard register live range did not work for subreg of a
multi-reg reload pseudo. Reload insns for such pseudo contain clobber
of the pseudo and splitting did not take this into account. The patch
fixes it.
gcc/ChangeLog:
PR rtl-optimization/104961
* lra-assigns.cc (find_reload_regno_insns): Process reload pseudo
clobber.
gcc/testsuite/ChangeLog:
PR rtl-optimization/104961
* gcc.target/i386/pr104961.c: New.
^ permalink raw reply [flat|nested] 8+ messages in thread
* [Bug rtl-optimization/104961] [9/10/11 Regression] compilation never (?) finishes at -Og
2022-03-16 21:29 [Bug rtl-optimization/104961] New: compilation never (?) finishes at -Og zsojka at seznam dot cz
` (2 preceding siblings ...)
2022-03-18 18:25 ` cvs-commit at gcc dot gnu.org
@ 2022-03-19 7:54 ` jakub at gcc dot gnu.org
2022-05-27 9:47 ` [Bug rtl-optimization/104961] [10/11 " rguenth at gcc dot gnu.org
` (2 subsequent siblings)
6 siblings, 0 replies; 8+ messages in thread
From: jakub at gcc dot gnu.org @ 2022-03-19 7:54 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104961
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jakub at gcc dot gnu.org
Summary|[9/10/11/12 Regression] |[9/10/11 Regression]
|compilation never (?) |compilation never (?)
|finishes at -Og |finishes at -Og
--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed on the trunk so far.
^ permalink raw reply [flat|nested] 8+ messages in thread
* [Bug rtl-optimization/104961] [10/11 Regression] compilation never (?) finishes at -Og
2022-03-16 21:29 [Bug rtl-optimization/104961] New: compilation never (?) finishes at -Og zsojka at seznam dot cz
` (3 preceding siblings ...)
2022-03-19 7:54 ` [Bug rtl-optimization/104961] [9/10/11 " jakub at gcc dot gnu.org
@ 2022-05-27 9:47 ` rguenth at gcc dot gnu.org
2022-06-28 10:48 ` jakub at gcc dot gnu.org
2023-07-07 10:42 ` [Bug rtl-optimization/104961] [11 " rguenth at gcc dot gnu.org
6 siblings, 0 replies; 8+ messages in thread
From: rguenth at gcc dot gnu.org @ 2022-05-27 9:47 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104961
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|9.5 |10.4
--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> ---
GCC 9 branch is being closed
^ permalink raw reply [flat|nested] 8+ messages in thread
* [Bug rtl-optimization/104961] [10/11 Regression] compilation never (?) finishes at -Og
2022-03-16 21:29 [Bug rtl-optimization/104961] New: compilation never (?) finishes at -Og zsojka at seznam dot cz
` (4 preceding siblings ...)
2022-05-27 9:47 ` [Bug rtl-optimization/104961] [10/11 " rguenth at gcc dot gnu.org
@ 2022-06-28 10:48 ` jakub at gcc dot gnu.org
2023-07-07 10:42 ` [Bug rtl-optimization/104961] [11 " rguenth at gcc dot gnu.org
6 siblings, 0 replies; 8+ messages in thread
From: jakub at gcc dot gnu.org @ 2022-06-28 10:48 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104961
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|10.4 |10.5
--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
GCC 10.4 is being released, retargeting bugs to GCC 10.5.
^ permalink raw reply [flat|nested] 8+ messages in thread
* [Bug rtl-optimization/104961] [11 Regression] compilation never (?) finishes at -Og
2022-03-16 21:29 [Bug rtl-optimization/104961] New: compilation never (?) finishes at -Og zsojka at seznam dot cz
` (5 preceding siblings ...)
2022-06-28 10:48 ` jakub at gcc dot gnu.org
@ 2023-07-07 10:42 ` rguenth at gcc dot gnu.org
6 siblings, 0 replies; 8+ messages in thread
From: rguenth at gcc dot gnu.org @ 2023-07-07 10:42 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104961
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|10.5 |11.5
--- Comment #7 from Richard Biener <rguenth at gcc dot gnu.org> ---
GCC 10 branch is being closed.
^ permalink raw reply [flat|nested] 8+ messages in thread
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2022-03-16 21:29 [Bug rtl-optimization/104961] New: compilation never (?) finishes at -Og zsojka at seznam dot cz
2022-03-16 21:37 ` [Bug rtl-optimization/104961] [9/10/11/12 Regression] " mpolacek at gcc dot gnu.org
2022-03-17 16:20 ` vmakarov at gcc dot gnu.org
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2022-03-19 7:54 ` [Bug rtl-optimization/104961] [9/10/11 " jakub at gcc dot gnu.org
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