https://gcc.gnu.org/bugzilla/show_bug.cgi?id=117648
Bug ID: 117648
Summary: ICE on x86_64-linux-gnu: Segmentation fault at -O2 and
above with "-fno-tree-ter -fno-tree-ch
-fselective-scheduling2 -gstatement-frontiers"
Product: gcc
Version: 15.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: rtl-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: iamanonymous.cs at gmail dot com
Target Milestone: ---
Compiler Explorer: https://godbolt.org/z/oG65n7ErW
*******************************************************************************
gcc version:
Using built-in specs.
COLLECT_GCC=/home/software/gcc-trunk/bin/gcc
COLLECT_LTO_WRAPPER=/home/software/gcc-trunk/libexec/gcc/x86_64-pc-linux-gnu/15.0.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: ../gcc/configure --disable-bootstrap --enable-checking=yes
--prefix=/home/software/gcc-trunk --enable-sanitizers --enable-languages=c,c++
--disable-werror --enable-multilib --enable-coverage
Thread model: posix
Supported LTO compression algorithms: zlib
gcc version 15.0.0 20241107 (experimental) (GCC)
*******************************************************************************
Program:
$ cat mutant.c
char *a, *b;
int c, d, e;
void f() {
for (; c; d++)
if (a[d] == '.' || a[d] == '+' || a[d] == '*')
b[e] = a[d] == '*' ?: '\\';
}
*******************************************************************************
Command Lines:
$ gcc -O2 -fno-tree-ter -fno-tree-ch -fselective-scheduling2
-gstatement-frontiers mutant.c
during RTL pass: sched2
mutant.c: In function 'f':
mutant.c:7:1: internal compiler error: Segmentation fault
7 | }
| ^
0x560e124 internal_error(char const*, ...)
../../gcc/gcc/diagnostic-global-context.cc:518
0x1fd3926 crash_signal
../../gcc/gcc/toplev.cc:323
0x1f1959d moving_insn_creates_bookkeeping_block_p
../../gcc/gcc/sel-sched.cc:2039
0x1f1a312 moveup_expr
../../gcc/gcc/sel-sched.cc:2207
0x1f1bbe9 moveup_expr_cached
../../gcc/gcc/sel-sched.cc:2552
0x1f2c06b move_op_ascend
../../gcc/gcc/sel-sched.cc:6157
0x1f2d81e code_motion_path_driver
../../gcc/gcc/sel-sched.cc:6656
0x1f2c7ee code_motion_process_successors
../../gcc/gcc/sel-sched.cc:6350
0x1f2d659 code_motion_path_driver
../../gcc/gcc/sel-sched.cc:6616
0x1f2c7ee code_motion_process_successors
../../gcc/gcc/sel-sched.cc:6350
0x1f2d659 code_motion_path_driver
../../gcc/gcc/sel-sched.cc:6616
0x1f2da97 move_op
../../gcc/gcc/sel-sched.cc:6710
0x1f28077 move_exprs_to_boundary
../../gcc/gcc/sel-sched.cc:5231
0x1f29698 schedule_expr_on_boundary
../../gcc/gcc/sel-sched.cc:5444
0x1f29f6b fill_insns
../../gcc/gcc/sel-sched.cc:5586
0x1f3099e schedule_on_fences
../../gcc/gcc/sel-sched.cc:7361
0x1f3130c sel_sched_region_2
../../gcc/gcc/sel-sched.cc:7499
0x1f315e2 sel_sched_region_1
../../gcc/gcc/sel-sched.cc:7541
0x1f31e5d sel_sched_region(int)
../../gcc/gcc/sel-sched.cc:7642
0x1f32252 run_selective_scheduling()
../../gcc/gcc/sel-sched.cc:7728
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.
