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* [Bug target/103842] New: [12 regression] ICE on ilmbase-2.5.7: during RTL pass: expand
@ 2021-12-27 9:15 slyfox at gcc dot gnu.org
2021-12-27 9:26 ` [Bug target/103842] " slyfox at gcc dot gnu.org
` (8 more replies)
0 siblings, 9 replies; 10+ messages in thread
From: slyfox at gcc dot gnu.org @ 2021-12-27 9:15 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103842
Bug ID: 103842
Summary: [12 regression] ICE on ilmbase-2.5.7: during RTL pass:
expand
Product: gcc
Version: 12.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: slyfox at gcc dot gnu.org
Target Milestone: ---
Target: x86_64-unknown-linux-gnu
Noticed new ICE on this week's gcc snapshot on ilmbase-2.5.7. Here is minimized
source:
void abs(float *);
struct Matrix33 {
float x[3][3];
float *operator[](int i) { return x[i]; }
Matrix33();
Matrix33(float f, float g) {
x[1][0] = x[1][1] = x[1][2] = f;
x[2][0] = g;
}
void equalWithAbsError();
Matrix33 inverse() {
Matrix33 s(x[1][2] - x[1][2], x[1][1] - x[1][1]);
float r = s[2][0];
if (r)
for (int i = 0; i < 3; ++i)
for (int j = 0; j < 3; ++j)
s[i][j] /= r;
for (int i = 0;;) {
float *__trans_tmp_2 = s[i];
abs(__trans_tmp_2);
}
}
};
void __assert_fail() {
Matrix33 m, inv1 = m.inverse(), ident1 = inv1;
ident1.equalWithAbsError();
}
$ g++-12.0.0 -O3 -c bug.cpp.cpp
during RTL pass: expand
bug.cpp.cpp: In function 'void __assert_fail()':
bug.cpp.cpp:27:5: internal compiler error: Segmentation fault
27 | }
| ^
0x21196c6 internal_error(char const*, ...)
???:0
$ g++-12.0.0 -v
Using built-in specs.
COLLECT_GCC=/nix/store/hw64v14l9lzircg596kmj1bjiy76wcih-gcc-12.0.0/bin/g++
COLLECT_LTO_WRAPPER=/nix/store/hw64v14l9lzircg596kmj1bjiy76wcih-gcc-12.0.0/libexec/gcc/x86_64-unknown-linux-gnu/12.0.0/lto-wrapper
Target: x86_64-unknown-linux-gnu
Configured with:
Thread model: posix
Supported LTO compression algorithms: zlib
gcc version 12.0.0 20211226 (experimental) (GCC)
Also attaching the unminimized preprocessed file in case it introduced
unrelated uninitialized values as `bug.cpp.cpp.orig`.
^ permalink raw reply [flat|nested] 10+ messages in thread
* [Bug target/103842] [12 regression] ICE on ilmbase-2.5.7: during RTL pass: expand
2021-12-27 9:15 [Bug target/103842] New: [12 regression] ICE on ilmbase-2.5.7: during RTL pass: expand slyfox at gcc dot gnu.org
@ 2021-12-27 9:26 ` slyfox at gcc dot gnu.org
2021-12-27 9:28 ` pinskia at gcc dot gnu.org
` (7 subsequent siblings)
8 siblings, 0 replies; 10+ messages in thread
From: slyfox at gcc dot gnu.org @ 2021-12-27 9:26 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103842
--- Comment #1 from Sergei Trofimovich <slyfox at gcc dot gnu.org> ---
Created attachment 52065
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=52065&action=edit
bug.cpp.cpp.orig.gz
bug.cpp.cpp.orig.gz - unreduced file (had to compress to get past 1MB limit)
^ permalink raw reply [flat|nested] 10+ messages in thread
* [Bug target/103842] [12 regression] ICE on ilmbase-2.5.7: during RTL pass: expand
2021-12-27 9:15 [Bug target/103842] New: [12 regression] ICE on ilmbase-2.5.7: during RTL pass: expand slyfox at gcc dot gnu.org
2021-12-27 9:26 ` [Bug target/103842] " slyfox at gcc dot gnu.org
@ 2021-12-27 9:28 ` pinskia at gcc dot gnu.org
2021-12-27 9:28 ` pinskia at gcc dot gnu.org
` (6 subsequent siblings)
8 siblings, 0 replies; 10+ messages in thread
From: pinskia at gcc dot gnu.org @ 2021-12-27 9:28 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103842
--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
This was exposed/caused by r12-6113 as far as I can tell.
We didn't do SLP of the divide before and now we do and it caused the ICE
somehow.
^ permalink raw reply [flat|nested] 10+ messages in thread
* [Bug target/103842] [12 regression] ICE on ilmbase-2.5.7: during RTL pass: expand
2021-12-27 9:15 [Bug target/103842] New: [12 regression] ICE on ilmbase-2.5.7: during RTL pass: expand slyfox at gcc dot gnu.org
2021-12-27 9:26 ` [Bug target/103842] " slyfox at gcc dot gnu.org
2021-12-27 9:28 ` pinskia at gcc dot gnu.org
@ 2021-12-27 9:28 ` pinskia at gcc dot gnu.org
2021-12-27 9:30 ` pinskia at gcc dot gnu.org
` (5 subsequent siblings)
8 siblings, 0 replies; 10+ messages in thread
From: pinskia at gcc dot gnu.org @ 2021-12-27 9:28 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103842
Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Ever confirmed|0 |1
Status|UNCONFIRMED |NEW
Last reconfirmed| |2021-12-27
Keywords| |ice-on-valid-code
Target Milestone|--- |12.0
^ permalink raw reply [flat|nested] 10+ messages in thread
* [Bug target/103842] [12 regression] ICE on ilmbase-2.5.7: during RTL pass: expand
2021-12-27 9:15 [Bug target/103842] New: [12 regression] ICE on ilmbase-2.5.7: during RTL pass: expand slyfox at gcc dot gnu.org
` (2 preceding siblings ...)
2021-12-27 9:28 ` pinskia at gcc dot gnu.org
@ 2021-12-27 9:30 ` pinskia at gcc dot gnu.org
2021-12-27 9:34 ` pinskia at gcc dot gnu.org
` (4 subsequent siblings)
8 siblings, 0 replies; 10+ messages in thread
From: pinskia at gcc dot gnu.org @ 2021-12-27 9:30 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103842
--- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
(insn 56 55 57 (set (subreg:V4SF (reg:V2SF 124 [ vect__35.17 ]) 0)
(div:V4SF (nil)
(reg:V4SF 126))) "t.c":18:23 -1
(nil))
Yes that nill there is wrong.
^ permalink raw reply [flat|nested] 10+ messages in thread
* [Bug target/103842] [12 regression] ICE on ilmbase-2.5.7: during RTL pass: expand
2021-12-27 9:15 [Bug target/103842] New: [12 regression] ICE on ilmbase-2.5.7: during RTL pass: expand slyfox at gcc dot gnu.org
` (3 preceding siblings ...)
2021-12-27 9:30 ` pinskia at gcc dot gnu.org
@ 2021-12-27 9:34 ` pinskia at gcc dot gnu.org
2021-12-27 10:59 ` jakub at gcc dot gnu.org
` (3 subsequent siblings)
8 siblings, 0 replies; 10+ messages in thread
From: pinskia at gcc dot gnu.org @ 2021-12-27 9:34 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103842
--- Comment #4 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
(gdb) n
534 rtx op1 = lowpart_subreg (V4SFmode, operands[1],
1: debug_rtx(operands[1]) = (subreg:V2SF (reg:DI 123) 0)
void
(gdb) n
536 rtx op2 = gen_rtx_VEC_CONCAT (V4SFmode, operands[2],
1: debug_rtx(operands[1]) = (subreg:V2SF (reg:DI 123) 0)
void
(gdb) p op1
$7 = (rtx) 0x0
^ permalink raw reply [flat|nested] 10+ messages in thread
* [Bug target/103842] [12 regression] ICE on ilmbase-2.5.7: during RTL pass: expand
2021-12-27 9:15 [Bug target/103842] New: [12 regression] ICE on ilmbase-2.5.7: during RTL pass: expand slyfox at gcc dot gnu.org
` (4 preceding siblings ...)
2021-12-27 9:34 ` pinskia at gcc dot gnu.org
@ 2021-12-27 10:59 ` jakub at gcc dot gnu.org
2021-12-28 7:32 ` ubizjak at gmail dot com
` (2 subsequent siblings)
8 siblings, 0 replies; 10+ messages in thread
From: jakub at gcc dot gnu.org @ 2021-12-27 10:59 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103842
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
Assignee|unassigned at gcc dot gnu.org |jakub at gcc dot gnu.org
--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 52068
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=52068&action=edit
gcc12-pr103842.patch
Untested fix.
^ permalink raw reply [flat|nested] 10+ messages in thread
* [Bug target/103842] [12 regression] ICE on ilmbase-2.5.7: during RTL pass: expand
2021-12-27 9:15 [Bug target/103842] New: [12 regression] ICE on ilmbase-2.5.7: during RTL pass: expand slyfox at gcc dot gnu.org
` (5 preceding siblings ...)
2021-12-27 10:59 ` jakub at gcc dot gnu.org
@ 2021-12-28 7:32 ` ubizjak at gmail dot com
2021-12-28 10:01 ` cvs-commit at gcc dot gnu.org
2021-12-28 10:03 ` jakub at gcc dot gnu.org
8 siblings, 0 replies; 10+ messages in thread
From: ubizjak at gmail dot com @ 2021-12-28 7:32 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103842
--- Comment #6 from Uroš Bizjak <ubizjak at gmail dot com> ---
(In reply to Jakub Jelinek from comment #5)
> Created attachment 52068 [details]
> gcc12-pr103842.patch
>
> Untested fix.
The patch is OK.
Thanks,
Uros.
^ permalink raw reply [flat|nested] 10+ messages in thread
* [Bug target/103842] [12 regression] ICE on ilmbase-2.5.7: during RTL pass: expand
2021-12-27 9:15 [Bug target/103842] New: [12 regression] ICE on ilmbase-2.5.7: during RTL pass: expand slyfox at gcc dot gnu.org
` (6 preceding siblings ...)
2021-12-28 7:32 ` ubizjak at gmail dot com
@ 2021-12-28 10:01 ` cvs-commit at gcc dot gnu.org
2021-12-28 10:03 ` jakub at gcc dot gnu.org
8 siblings, 0 replies; 10+ messages in thread
From: cvs-commit at gcc dot gnu.org @ 2021-12-28 10:01 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103842
--- Comment #7 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:242783c52c22ed96eae722b2fa9847711ac84699
commit r12-6129-g242783c52c22ed96eae722b2fa9847711ac84699
Author: Jakub Jelinek <jakub@redhat.com>
Date: Tue Dec 28 10:58:43 2021 +0100
i386: Fix handling of SUBREGs in divv2sf3 [PR103842]
register_operand predicate allows not just REGs, but also SUBREGs of REGs,
and for the latter lowpart_subreg might FAIL when trying to create
paradoxical
SUBREG in some cases. For the input operand fixed by force_reg on it
first,
for the output operand handled by always dividing into a fresh V4SFmode
temporary
and emit_move_insn into the destination afterwards, that is also beneficial
for
combine.
2021-12-28 Jakub Jelinek <jakub@redhat.com>
PR target/103842
* config/i386/mmx.md (divv2sf3): Use force_reg on op1. Always
perform
divv4sf3 into a pseudo and emit_move_insn into operands[0].
* g++.dg/opt/pr103842.C: New test.
^ permalink raw reply [flat|nested] 10+ messages in thread
* [Bug target/103842] [12 regression] ICE on ilmbase-2.5.7: during RTL pass: expand
2021-12-27 9:15 [Bug target/103842] New: [12 regression] ICE on ilmbase-2.5.7: during RTL pass: expand slyfox at gcc dot gnu.org
` (7 preceding siblings ...)
2021-12-28 10:01 ` cvs-commit at gcc dot gnu.org
@ 2021-12-28 10:03 ` jakub at gcc dot gnu.org
8 siblings, 0 replies; 10+ messages in thread
From: jakub at gcc dot gnu.org @ 2021-12-28 10:03 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103842
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Resolution|--- |FIXED
Status|ASSIGNED |RESOLVED
--- Comment #8 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed.
^ permalink raw reply [flat|nested] 10+ messages in thread
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