* [Bug target/100626] ICE Segmentation fault (during RTL pass: split1)
2021-05-16 18:05 [Bug tree-optimization/100626] New: ICE Segmentation fault (during RTL pass: split1) haoxintu at gmail dot com
@ 2021-05-17 1:54 ` haoxintu at gmail dot com
2021-05-17 8:08 ` [Bug target/100626] [11/12 Regression] ICE Segmentation fault (during RTL pass: split1) since r11-165-geb72dc663e9070b2 marxin at gcc dot gnu.org
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From: haoxintu at gmail dot com @ 2021-05-17 1:54 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100626
--- Comment #1 from Haoxin Tu <haoxintu at gmail dot com> ---
Another test case that crashes on all -O1 to -Os.
$cat small.c
#include <stdint.h>
int uc_4, i_5, us_7;
void fn1() {
int li_18;
int64_t *ptr_43 = &li_18;
for (; us_7;) {
fn2();
*ptr_43 ^= uc_4;
}
i_5 = li_18;
}
^ permalink raw reply [flat|nested] 11+ messages in thread
* [Bug target/100626] [11/12 Regression] ICE Segmentation fault (during RTL pass: split1) since r11-165-geb72dc663e9070b2
2021-05-16 18:05 [Bug tree-optimization/100626] New: ICE Segmentation fault (during RTL pass: split1) haoxintu at gmail dot com
2021-05-17 1:54 ` [Bug target/100626] " haoxintu at gmail dot com
@ 2021-05-17 8:08 ` marxin at gcc dot gnu.org
2021-05-17 8:53 ` jakub at gcc dot gnu.org
` (7 subsequent siblings)
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From: marxin at gcc dot gnu.org @ 2021-05-17 8:08 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100626
Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Last reconfirmed| |2021-05-17
CC| |marxin at gcc dot gnu.org,
| |rguenth at gcc dot gnu.org
Status|UNCONFIRMED |NEW
Summary|ICE Segmentation fault |[11/12 Regression] ICE
|(during RTL pass: split1) |Segmentation fault (during
| |RTL pass: split1) since
| |r11-165-geb72dc663e9070b2
Ever confirmed|0 |1
--- Comment #2 from Martin Liška <marxin at gcc dot gnu.org> ---
Started with r11-165-geb72dc663e9070b2.
^ permalink raw reply [flat|nested] 11+ messages in thread
* [Bug target/100626] [11/12 Regression] ICE Segmentation fault (during RTL pass: split1) since r11-165-geb72dc663e9070b2
2021-05-16 18:05 [Bug tree-optimization/100626] New: ICE Segmentation fault (during RTL pass: split1) haoxintu at gmail dot com
2021-05-17 1:54 ` [Bug target/100626] " haoxintu at gmail dot com
2021-05-17 8:08 ` [Bug target/100626] [11/12 Regression] ICE Segmentation fault (during RTL pass: split1) since r11-165-geb72dc663e9070b2 marxin at gcc dot gnu.org
@ 2021-05-17 8:53 ` jakub at gcc dot gnu.org
2021-05-17 11:26 ` ubizjak at gmail dot com
` (6 subsequent siblings)
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From: jakub at gcc dot gnu.org @ 2021-05-17 8:53 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100626
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jakub at gcc dot gnu.org
Target Milestone|--- |11.2
^ permalink raw reply [flat|nested] 11+ messages in thread
* [Bug target/100626] [11/12 Regression] ICE Segmentation fault (during RTL pass: split1) since r11-165-geb72dc663e9070b2
2021-05-16 18:05 [Bug tree-optimization/100626] New: ICE Segmentation fault (during RTL pass: split1) haoxintu at gmail dot com
` (2 preceding siblings ...)
2021-05-17 8:53 ` jakub at gcc dot gnu.org
@ 2021-05-17 11:26 ` ubizjak at gmail dot com
2021-05-17 12:49 ` rguenth at gcc dot gnu.org
` (5 subsequent siblings)
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From: ubizjak at gmail dot com @ 2021-05-17 11:26 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100626
--- Comment #3 from Uroš Bizjak <ubizjak at gmail dot com> ---
*<any_or:code>di3_doubleword calls split_double_mode with:
op0: (subreg:DI (reg/v:SI 89 [ li_18 ]) 0)
op1: (reg:DI 90 [ uc_4 ])
op2: (mem/c:DI (plus:SI (reg/f:SI 19 frame)
(const_int -4 [0xfffffffffffffffc])) [0 S8 A32])
and split_double_mode chokes on paradoxical subreg op0, returning (nil) on
highpart of op0:
(reg/v:SI 89 [ li_18 ])
(subreg:SI (reg:DI 90 [ uc_4 ]) 0)
(mem/c:SI (plus:SI (reg/f:SI 19 frame)
(const_int -4 [0xfffffffffffffffc])) [0 S4 A32])
(nil)
(subreg:SI (reg:DI 90 [ uc_4 ]) 4)
(mem/c:SI (reg/f:SI 19 frame) [0 S4 A32])
^ permalink raw reply [flat|nested] 11+ messages in thread
* [Bug target/100626] [11/12 Regression] ICE Segmentation fault (during RTL pass: split1) since r11-165-geb72dc663e9070b2
2021-05-16 18:05 [Bug tree-optimization/100626] New: ICE Segmentation fault (during RTL pass: split1) haoxintu at gmail dot com
` (3 preceding siblings ...)
2021-05-17 11:26 ` ubizjak at gmail dot com
@ 2021-05-17 12:49 ` rguenth at gcc dot gnu.org
2021-05-17 18:09 ` haoxintu at gmail dot com
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From: rguenth at gcc dot gnu.org @ 2021-05-17 12:49 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100626
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P2
^ permalink raw reply [flat|nested] 11+ messages in thread
* [Bug target/100626] [11/12 Regression] ICE Segmentation fault (during RTL pass: split1) since r11-165-geb72dc663e9070b2
2021-05-16 18:05 [Bug tree-optimization/100626] New: ICE Segmentation fault (during RTL pass: split1) haoxintu at gmail dot com
` (4 preceding siblings ...)
2021-05-17 12:49 ` rguenth at gcc dot gnu.org
@ 2021-05-17 18:09 ` haoxintu at gmail dot com
2021-05-17 18:37 ` ubizjak at gmail dot com
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From: haoxintu at gmail dot com @ 2021-05-17 18:09 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100626
--- Comment #4 from Haoxin Tu <haoxintu at gmail dot com> ---
I found that it also crashes (under -O1 and -Os) on today's trunk version of
GCC.
$cat small.c
#include <stdint.h>
int a;
void b() {
int c;
uint64_t *d = &c;
uint8_t *e;
if (a)
*d &= *e;
if (*d)
for (;;)
;
}
$gcc -w -O1 -m32 small.c (or -Os)
during RTL pass: split1
small.c: In function ‘b’:
small.c:12:1: internal compiler error: Segmentation fault
12 | }
| ^
0xba0cef crash_signal
../../gcc/toplev.c:327
0xefc40a ix86_fixup_binary_operands(rtx_code, machine_mode, rtx_def**)
../../gcc/config/i386/i386-expand.c:900
0xefc5bb ix86_expand_binary_operator(rtx_code, machine_mode, rtx_def**)
../../gcc/config/i386/i386-expand.c:943
0x1214538 gen_andsi3(rtx_def*, rtx_def*, rtx_def*)
../../gcc/config/i386/i386.md:9091
0x12147b4 gen_split_191(rtx_insn*, rtx_def**)
../../gcc/config/i386/i386.md:9123
0x13f8f22 split_insns(rtx_def*, rtx_insn*)
../../gcc/config/i386/i386.md:14140
0x87e61e try_split(rtx_def*, rtx_insn*, int)
../../gcc/emit-rtl.c:3786
0xb15ad1 split_insn
../../gcc/recog.c:3363
0xb1af47 split_all_insns()
../../gcc/recog.c:3467
0xb1afd8 execute
../../gcc/recog.c:4385
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
$gcc -v
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/media/haoxin/SeagateData/haoxin-data/dut-research/compilers/gcc/build/bin/../libexec/gcc/x86_64-pc-linux-gnu/12.0.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: ../configure
--prefix=/home/haoxin/haoxin-data/dut-research/compilers/gcc/build/
--enable-bootstrap --enable-checking=release --enable-languages=c,c++
--enable-multilib
Thread model: posix
Supported LTO compression algorithms: zlib
gcc version 12.0.0 20210517 (experimental) (GCC)
^ permalink raw reply [flat|nested] 11+ messages in thread
* [Bug target/100626] [11/12 Regression] ICE Segmentation fault (during RTL pass: split1) since r11-165-geb72dc663e9070b2
2021-05-16 18:05 [Bug tree-optimization/100626] New: ICE Segmentation fault (during RTL pass: split1) haoxintu at gmail dot com
` (5 preceding siblings ...)
2021-05-17 18:09 ` haoxintu at gmail dot com
@ 2021-05-17 18:37 ` ubizjak at gmail dot com
2021-05-18 13:46 ` cvs-commit at gcc dot gnu.org
` (2 subsequent siblings)
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From: ubizjak at gmail dot com @ 2021-05-17 18:37 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100626
Uroš Bizjak <ubizjak at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Assignee|unassigned at gcc dot gnu.org |ubizjak at gmail dot com
Status|NEW |ASSIGNED
--- Comment #5 from Uroš Bizjak <ubizjak at gmail dot com> ---
Created attachment 50828
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=50828&action=edit
Proposed patch
Patch in testing.
^ permalink raw reply [flat|nested] 11+ messages in thread
* [Bug target/100626] [11/12 Regression] ICE Segmentation fault (during RTL pass: split1) since r11-165-geb72dc663e9070b2
2021-05-16 18:05 [Bug tree-optimization/100626] New: ICE Segmentation fault (during RTL pass: split1) haoxintu at gmail dot com
` (6 preceding siblings ...)
2021-05-17 18:37 ` ubizjak at gmail dot com
@ 2021-05-18 13:46 ` cvs-commit at gcc dot gnu.org
2021-05-25 17:22 ` cvs-commit at gcc dot gnu.org
2021-05-25 17:23 ` ubizjak at gmail dot com
9 siblings, 0 replies; 11+ messages in thread
From: cvs-commit at gcc dot gnu.org @ 2021-05-18 13:46 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100626
--- Comment #6 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Uros Bizjak <uros@gcc.gnu.org>:
https://gcc.gnu.org/g:d39fbed75810fc7478842503ecb0268b85dc9c2e
commit r12-878-gd39fbed75810fc7478842503ecb0268b85dc9c2e
Author: Uros Bizjak <ubizjak@gmail.com>
Date: Tue May 18 15:45:54 2021 +0200
i386: Fix split_double_mode with paradoxical subreg [PR100626]
split_double_mode calls simplify_gen_subreg, which fails for the
high half of the paradoxical subreg. Return temporary register
instead of NULL RTX in this case.
2021-05-18 Uroš Bizjak <ubizjak@gmail.com>
gcc/
PR target/100626
* config/i386/i386-expand.c (split_double_mode): Return
temporary register when simplify_gen_subreg fails with
the high half od the paradoxical subreg.
^ permalink raw reply [flat|nested] 11+ messages in thread
* [Bug target/100626] [11/12 Regression] ICE Segmentation fault (during RTL pass: split1) since r11-165-geb72dc663e9070b2
2021-05-16 18:05 [Bug tree-optimization/100626] New: ICE Segmentation fault (during RTL pass: split1) haoxintu at gmail dot com
` (7 preceding siblings ...)
2021-05-18 13:46 ` cvs-commit at gcc dot gnu.org
@ 2021-05-25 17:22 ` cvs-commit at gcc dot gnu.org
2021-05-25 17:23 ` ubizjak at gmail dot com
9 siblings, 0 replies; 11+ messages in thread
From: cvs-commit at gcc dot gnu.org @ 2021-05-25 17:22 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100626
--- Comment #7 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The releases/gcc-11 branch has been updated by Uros Bizjak <uros@gcc.gnu.org>:
https://gcc.gnu.org/g:6be2c12e37b167890d68587086a2186358b64c02
commit r11-8468-g6be2c12e37b167890d68587086a2186358b64c02
Author: Uros Bizjak <ubizjak@gmail.com>
Date: Tue May 18 15:45:54 2021 +0200
i386: Fix split_double_mode with paradoxical subreg [PR100626]
split_double_mode calls simplify_gen_subreg, which fails for the
high half of the paradoxical subreg. Return temporary register
instead of NULL RTX in this case.
2021-05-18 Uroš Bizjak <ubizjak@gmail.com>
gcc/
PR target/100626
* config/i386/i386-expand.c (split_double_mode): Return
temporary register when simplify_gen_subreg fails with
the high half od the paradoxical subreg.
(cherry picked from commit d39fbed75810fc7478842503ecb0268b85dc9c2e)
^ permalink raw reply [flat|nested] 11+ messages in thread
* [Bug target/100626] [11/12 Regression] ICE Segmentation fault (during RTL pass: split1) since r11-165-geb72dc663e9070b2
2021-05-16 18:05 [Bug tree-optimization/100626] New: ICE Segmentation fault (during RTL pass: split1) haoxintu at gmail dot com
` (8 preceding siblings ...)
2021-05-25 17:22 ` cvs-commit at gcc dot gnu.org
@ 2021-05-25 17:23 ` ubizjak at gmail dot com
9 siblings, 0 replies; 11+ messages in thread
From: ubizjak at gmail dot com @ 2021-05-25 17:23 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100626
Uroš Bizjak <ubizjak at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
Target|x86_64-linux-gnu |x86
|i?86-linux-gnu |
--- Comment #8 from Uroš Bizjak <ubizjak at gmail dot com> ---
Fixed.
^ permalink raw reply [flat|nested] 11+ messages in thread