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* [Bug tree-optimization/106521] New: ICE at -O1 with "-floop-unroll-and-jam --param unroll-jam-min-percent=0": verify_ssa failed
@ 2022-08-03 22:44 zhendong.su at inf dot ethz.ch
2022-08-04 7:37 ` [Bug tree-optimization/106521] [13 Regression] ICE at -O1 with "-floop-unroll-and-jam --param unroll-jam-min-percent=0": verify_ssa failed since r13-1450-gd2a898666609452e marxin at gcc dot gnu.org
` (3 more replies)
0 siblings, 4 replies; 5+ messages in thread
From: zhendong.su at inf dot ethz.ch @ 2022-08-03 22:44 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106521
Bug ID: 106521
Summary: ICE at -O1 with "-floop-unroll-and-jam --param
unroll-jam-min-percent=0": verify_ssa failed
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: zhendong.su at inf dot ethz.ch
Target Milestone: ---
It appears to be a recent regression (and possibly related to PR106249).
Compiler Explorer: https://godbolt.org/z/Tanf9axav
[545] % gcctk -v
Using built-in specs.
COLLECT_GCC=gcctk
COLLECT_LTO_WRAPPER=/local/suz-local/software/local/gcc-trunk/libexec/gcc/x86_64-pc-linux-gnu/13.0.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: ../gcc-trunk/configure --disable-bootstrap
--enable-checking=yes --prefix=/local/suz-local/software/local/gcc-trunk
--enable-sanitizers --enable-languages=c,c++ --disable-werror --enable-multilib
--with-system-zlib
Thread model: posix
Supported LTO compression algorithms: zlib
gcc version 13.0.0 20220803 (experimental) [master r13-1950-g9bb19e143cf] (GCC)
[546] %
[546] % gcctk -O1 -floop-unroll-and-jam --param unroll-jam-min-percent=0
small.c
small.c: In function ‘main’:
small.c:4:5: error: definition in block 30 does not dominate use in block 33
4 | int main() {
| ^~~~
for SSA_NAME: b_lsm.15_82 in statement:
b_lsm.15_23 = PHI <b_lsm.15_8(22), b_lsm.15_82(33)>
PHI argument
b_lsm.15_82
for PHI node
b_lsm.15_23 = PHI <b_lsm.15_8(22), b_lsm.15_82(33)>
during GIMPLE pass: unrolljam
small.c:4:5: internal compiler error: verify_ssa failed
0x11356ef verify_ssa(bool, bool)
../../gcc-trunk/gcc/tree-ssa.cc:1211
0x105fb5b rewrite_into_loop_closed_ssa_1
../../gcc-trunk/gcc/tree-ssa-loop-manip.cc:576
0x105fb5b rewrite_into_loop_closed_ssa(bitmap_head*, unsigned int)
../../gcc-trunk/gcc/tree-ssa-loop-manip.cc:626
0x1c94c2d tree_loop_unroll_and_jam
../../gcc-trunk/gcc/gimple-loop-jam.cc:612
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.
[547] %
[547] % cat small.c
short a, b, e;
volatile long c;
long d;
int main() {
for (; d; d++) {
long g = a = 1;
for (; a; a++) {
g++;
c;
}
g && (b = e);
}
return 0;
}
^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug tree-optimization/106521] [13 Regression] ICE at -O1 with "-floop-unroll-and-jam --param unroll-jam-min-percent=0": verify_ssa failed since r13-1450-gd2a898666609452e
2022-08-03 22:44 [Bug tree-optimization/106521] New: ICE at -O1 with "-floop-unroll-and-jam --param unroll-jam-min-percent=0": verify_ssa failed zhendong.su at inf dot ethz.ch
@ 2022-08-04 7:37 ` marxin at gcc dot gnu.org
2022-08-04 9:36 ` rguenth at gcc dot gnu.org
` (2 subsequent siblings)
3 siblings, 0 replies; 5+ messages in thread
From: marxin at gcc dot gnu.org @ 2022-08-04 7:37 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106521
Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Last reconfirmed| |2022-08-04
Version|unknown |13.0
CC| |marxin at gcc dot gnu.org,
| |rguenth at gcc dot gnu.org
Summary|ICE at -O1 with |[13 Regression] ICE at -O1
|"-floop-unroll-and-jam |with "-floop-unroll-and-jam
|--param |--param
|unroll-jam-min-percent=0": |unroll-jam-min-percent=0":
|verify_ssa failed |verify_ssa failed since
| |r13-1450-gd2a898666609452e
Ever confirmed|0 |1
Status|UNCONFIRMED |NEW
Target Milestone|--- |13.0
--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
Started with r13-1450-gd2a898666609452e.
^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug tree-optimization/106521] [13 Regression] ICE at -O1 with "-floop-unroll-and-jam --param unroll-jam-min-percent=0": verify_ssa failed since r13-1450-gd2a898666609452e
2022-08-03 22:44 [Bug tree-optimization/106521] New: ICE at -O1 with "-floop-unroll-and-jam --param unroll-jam-min-percent=0": verify_ssa failed zhendong.su at inf dot ethz.ch
2022-08-04 7:37 ` [Bug tree-optimization/106521] [13 Regression] ICE at -O1 with "-floop-unroll-and-jam --param unroll-jam-min-percent=0": verify_ssa failed since r13-1450-gd2a898666609452e marxin at gcc dot gnu.org
@ 2022-08-04 9:36 ` rguenth at gcc dot gnu.org
2022-08-04 13:01 ` cvs-commit at gcc dot gnu.org
2022-08-04 13:02 ` rguenth at gcc dot gnu.org
3 siblings, 0 replies; 5+ messages in thread
From: rguenth at gcc dot gnu.org @ 2022-08-04 9:36 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106521
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
Assignee|unassigned at gcc dot gnu.org |rguenth at gcc dot gnu.org
--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
Mine.
^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug tree-optimization/106521] [13 Regression] ICE at -O1 with "-floop-unroll-and-jam --param unroll-jam-min-percent=0": verify_ssa failed since r13-1450-gd2a898666609452e
2022-08-03 22:44 [Bug tree-optimization/106521] New: ICE at -O1 with "-floop-unroll-and-jam --param unroll-jam-min-percent=0": verify_ssa failed zhendong.su at inf dot ethz.ch
2022-08-04 7:37 ` [Bug tree-optimization/106521] [13 Regression] ICE at -O1 with "-floop-unroll-and-jam --param unroll-jam-min-percent=0": verify_ssa failed since r13-1450-gd2a898666609452e marxin at gcc dot gnu.org
2022-08-04 9:36 ` rguenth at gcc dot gnu.org
@ 2022-08-04 13:01 ` cvs-commit at gcc dot gnu.org
2022-08-04 13:02 ` rguenth at gcc dot gnu.org
3 siblings, 0 replies; 5+ messages in thread
From: cvs-commit at gcc dot gnu.org @ 2022-08-04 13:01 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106521
--- Comment #3 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Richard Biener <rguenth@gcc.gnu.org>:
https://gcc.gnu.org/g:d8552eaddc40b72461158e56b5db8709f2eb21ed
commit r13-1961-gd8552eaddc40b72461158e56b5db8709f2eb21ed
Author: Richard Biener <rguenther@suse.de>
Date: Thu Aug 4 11:55:15 2022 +0200
tree-optimization/106521 - unroll-and-jam LC SSA rewrite
The LC SSA rewrite performs SSA verification at start but the VN
run performed on the unrolled-and-jammed body can leave us with
invalid SSA form until CFG cleanup is run. So make sure we do that
before rewriting into LC SSA.
PR tree-optimization/106521
* gimple-loop-jam.cc (tree_loop_unroll_and_jam): Perform
CFG cleanup manually before rewriting into LC SSA.
* gcc.dg/torture/pr106521.c: New testcase.
^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug tree-optimization/106521] [13 Regression] ICE at -O1 with "-floop-unroll-and-jam --param unroll-jam-min-percent=0": verify_ssa failed since r13-1450-gd2a898666609452e
2022-08-03 22:44 [Bug tree-optimization/106521] New: ICE at -O1 with "-floop-unroll-and-jam --param unroll-jam-min-percent=0": verify_ssa failed zhendong.su at inf dot ethz.ch
` (2 preceding siblings ...)
2022-08-04 13:01 ` cvs-commit at gcc dot gnu.org
@ 2022-08-04 13:02 ` rguenth at gcc dot gnu.org
3 siblings, 0 replies; 5+ messages in thread
From: rguenth at gcc dot gnu.org @ 2022-08-04 13:02 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106521
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Resolution|--- |FIXED
Status|ASSIGNED |RESOLVED
--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed.
^ permalink raw reply [flat|nested] 5+ messages in thread
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2022-08-03 22:44 [Bug tree-optimization/106521] New: ICE at -O1 with "-floop-unroll-and-jam --param unroll-jam-min-percent=0": verify_ssa failed zhendong.su at inf dot ethz.ch
2022-08-04 7:37 ` [Bug tree-optimization/106521] [13 Regression] ICE at -O1 with "-floop-unroll-and-jam --param unroll-jam-min-percent=0": verify_ssa failed since r13-1450-gd2a898666609452e marxin at gcc dot gnu.org
2022-08-04 9:36 ` rguenth at gcc dot gnu.org
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