https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81571
Bug ID: 81571
Summary: ICE at -O3 on x86_64-linux-gnu in both 32-bit and
64-bit modes (internal compiler error: in as_a, at
is-a.h:192)
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: chengniansun at gmail dot com
Target Milestone: ---
$ gcc-trunk -v
Using built-in specs.
COLLECT_GCC=gcc-trunk
COLLECT_LTO_WRAPPER=/usr/local/gcc-trunk/libexec/gcc/x86_64-pc-linux-gnu/8.0.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: ../gcc-source-trunk/configure --enable-languages=c,c++,lto
--prefix=/usr/local/gcc-trunk --disable-bootstrap
Thread model: posix
gcc version 8.0.0 20170726 (experimental) [trunk revision 250555] (GCC)
$ gcc-trunk -O3 small.c
small.c: In function ‘fn1’:
small.c:2:7: warning: type of ‘p1’ defaults to ‘int’ [-Wimplicit-int]
short fn1(p1) { return p1; }
^~~
during GIMPLE pass: vect
small.c: In function ‘main’:
small.c:6:5: internal compiler error: in as_a, at is-a.h:192
int main() {
^~~~
0x5c7e8b as_a<gphi*, gimple>
../../gcc-source-trunk/gcc/is-a.h:192
0x5c7e96 as_a<gphi*, gimple>
../../gcc-source-trunk/gcc/is-a.h:192
0x5c7e96 gimple_phi_arg
../../gcc-source-trunk/gcc/gimple.h:4362
0x5c7e96 gimple_phi_arg_def
../../gcc-source-trunk/gcc/gimple.h:4406
0x5ca73e get_initial_defs_for_reduction
../../gcc-source-trunk/gcc/tree-vect-loop.c:4254
0x5cabc4 vect_create_epilog_for_reduction
../../gcc-source-trunk/gcc/tree-vect-loop.c:4476
0xecf1c0 vectorizable_reduction(gimple*, gimple_stmt_iterator*, gimple**,
_slp_tree*, _slp_instance*)
../../gcc-source-trunk/gcc/tree-vect-loop.c:6526
0xec072c vect_transform_stmt(gimple*, gimple_stmt_iterator*, bool*, _slp_tree*,
_slp_instance*)
../../gcc-source-trunk/gcc/tree-vect-stmts.c:8719
0xee2922 vect_schedule_slp_instance
../../gcc-source-trunk/gcc/tree-vect-slp.c:3724
0xee3233 vect_schedule_slp(vec_info*)
../../gcc-source-trunk/gcc/tree-vect-slp.c:3796
0xec87bb vect_transform_loop(_loop_vec_info*)
../../gcc-source-trunk/gcc/tree-vect-loop.c:7614
0xeeada3 vectorize_loops()
../../gcc-source-trunk/gcc/tree-vectorizer.c:745
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.
$ cat small.c
int a, b, c, d;
short fn1(p1) { return p1; }
int fn2(int p1) {}
int main() {
for (; c; c++)
a |= fn1(1, a) | fn2(b |= d);
return 0;
}
$
