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* [Bug rtl-optimization/110418] New: ICE on valid code at -O2 and -O3 with -fselective-scheduling2: Segmentation fault
@ 2023-06-26 20:23 zhendong.su at inf dot ethz.ch
0 siblings, 0 replies; only message in thread
From: zhendong.su at inf dot ethz.ch @ 2023-06-26 20:23 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110418
Bug ID: 110418
Summary: ICE on valid code at -O2 and -O3 with
-fselective-scheduling2: Segmentation fault
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: rtl-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: zhendong.su at inf dot ethz.ch
Target Milestone: ---
This appears to be a long-latent issue, affecting 6.* and later.
Compiler Explorer: https://godbolt.org/z/sG5bsxrKq
[506] % gcctk -v
Using built-in specs.
COLLECT_GCC=gcctk
COLLECT_LTO_WRAPPER=/local/home/suz/suz-local/software/local/gcc-trunk/bin/../libexec/gcc/x86_64-pc-linux-gnu/14.0.0/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
--disable-multilib
Thread model: posix
Supported LTO compression algorithms: zlib
gcc version 14.0.0 20230625 (experimental) [master r14-924-gd709841ae0f] (GCC)
[507] %
[507] % gcctk -O2 -fselective-scheduling2 small.c
during RTL pass: sched2
small.c: In function ‘main’:
small.c:20:1: internal compiler error: Segmentation fault
20 | }
| ^
0xfc7c03 crash_signal
../../gcc-trunk/gcc/toplev.cc:314
0x7fdf8a71151f ???
./signal/../sysdeps/unix/sysv/linux/x86_64/libc_sigaction.c:0
0xf726a0 init_expr
../../gcc-trunk/gcc/sel-sched-ir.cc:1627
0xf726a0 copy_expr_onside(_expr*, _expr*)
../../gcc-trunk/gcc/sel-sched-ir.cc:1685
0xf80619 move_op_orig_expr_found
../../gcc-trunk/gcc/sel-sched.cc:5989
0xf856d9 code_motion_path_driver
../../gcc-trunk/gcc/sel-sched.cc:6543
0xf85c49 code_motion_process_successors
../../gcc-trunk/gcc/sel-sched.cc:6342
0xf85c49 code_motion_path_driver
../../gcc-trunk/gcc/sel-sched.cc:6608
0xf85c49 code_motion_process_successors
../../gcc-trunk/gcc/sel-sched.cc:6342
0xf85c49 code_motion_path_driver
../../gcc-trunk/gcc/sel-sched.cc:6608
0xf85c49 code_motion_process_successors
../../gcc-trunk/gcc/sel-sched.cc:6342
0xf85c49 code_motion_path_driver
../../gcc-trunk/gcc/sel-sched.cc:6608
0xf85c49 code_motion_process_successors
../../gcc-trunk/gcc/sel-sched.cc:6342
0xf85c49 code_motion_path_driver
../../gcc-trunk/gcc/sel-sched.cc:6608
0xf86279 move_op
../../gcc-trunk/gcc/sel-sched.cc:6702
0xf86279 move_exprs_to_boundary
../../gcc-trunk/gcc/sel-sched.cc:5223
0xf86279 schedule_expr_on_boundary
../../gcc-trunk/gcc/sel-sched.cc:5436
0xf887ef fill_insns
../../gcc-trunk/gcc/sel-sched.cc:5578
0xf887ef schedule_on_fences
../../gcc-trunk/gcc/sel-sched.cc:7353
0xf887ef sel_sched_region_2
../../gcc-trunk/gcc/sel-sched.cc:7491
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.
[508] %
[508] % cat small.c
int printf (const char *, ...);
volatile int a, c, e;
int b = 1, d, f = 1;
int main ()
{
int h, i = b - c, k;
char j;
L:
j = k = ~(-(b * a) / f);
c = -((1 - d / b) | ((c | 1 / j) - b));
e = ~((1 & b) ^ e) / ~f;
if (a)
printf ("%d", h);
if (!(a || k < 2 || a))
e = j;
if (a < d || e)
goto L;
d = f && i;
return 0;
}
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2023-06-26 20:23 [Bug rtl-optimization/110418] New: ICE on valid code at -O2 and -O3 with -fselective-scheduling2: Segmentation fault zhendong.su at inf dot ethz.ch
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