https://gcc.gnu.org/bugzilla/show_bug.cgi?id=121987
Bug ID: 121987
Summary: ICE on valid code at -O{s,2,3} on x86_64-linux-gnu: in
upper_bound, at value-range.h:1186
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: ipa
Assignee: unassigned at gcc dot gnu.org
Reporter: zhendong.su at inf dot ethz.ch
Target Milestone: ---
Compiler Explorer: https://godbolt.org/z/EWEfqao3s
Note:
- fails: trunk
- works: 15.2 and earlier
[573] % 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/16.0.0/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 --enable-multilib
Thread model: posix
Supported LTO compression algorithms: zlib
gcc version 16.0.0 20250918 (experimental) (GCC)
[574] %
[574] % gcctk -O3 small.c
during GIMPLE pass: evrp
small.c: In function ‘main’:
small.c:14:1: internal compiler error: in upper_bound, at value-range.h:1186
14 | }
| ^
0x25626ab internal_error(char const*, ...)
../../gcc-trunk/gcc/diagnostic-global-context.cc:786
0xa09860 fancy_abort(char const*, int, char const*)
../../gcc-trunk/gcc/diagnostics/context.cc:1786
0xeaab48 irange::upper_bound() const
../../gcc-trunk/gcc/value-range.h:1186
0xeaab48 irange::upper_bound() const
../../gcc-trunk/gcc/value-range.h:1183
0x10cc359 operator_lshift::op1_range(irange&, tree_node*, irange const&, irange
const&, relation_trio) const
../../gcc-trunk/gcc/range-op.cc:2868
0xdff3ad gori_compute::compute_operand1_range(vrange&,
gimple_range_op_handler&, vrange const&, fur_source&, value_relation*)
../../gcc-trunk/gcc/gimple-range-gori.cc:1162
0xe01d0b gori_compute::compute_operand_range(vrange&, gimple*, vrange const&,
tree_node*, fur_source&, value_relation*)
../../gcc-trunk/gcc/gimple-range-gori.cc:754
0xe014a9 gori_compute::compute_operand_range(vrange&, gimple*, vrange const&,
tree_node*, fur_source&, value_relation*)
../../gcc-trunk/gcc/gimple-range-gori.cc:769
0xe00311 gori_compute::compute_operand1_and_operand2_range(vrange&,
gimple_range_op_handler&, vrange const&, tree_node*, fur_source&,
value_relation*)
../../gcc-trunk/gcc/gimple-range-gori.cc:1295
0xe01313 gori_compute::compute_operand_range(vrange&, gimple*, vrange const&,
tree_node*, fur_source&, value_relation*)
../../gcc-trunk/gcc/gimple-range-gori.cc:747
0xe014a9 gori_compute::compute_operand_range(vrange&, gimple*, vrange const&,
tree_node*, fur_source&, value_relation*)
../../gcc-trunk/gcc/gimple-range-gori.cc:769
0xe033cb gori_compute::edge_range_p(vrange&, edge_def*, tree_node*,
range_query&)
../../gcc-trunk/gcc/gimple-range-gori.cc:1420
0xdedc82 ranger_cache::range_from_dom(vrange&, tree_node*, basic_block_def*,
ranger_cache::rfd_mode)
../../gcc-trunk/gcc/gimple-range-cache.cc:1806
0xdee2e5 ranger_cache::range_from_dom(vrange&, tree_node*, basic_block_def*,
ranger_cache::rfd_mode)
../../gcc-trunk/gcc/gimple-range-cache.cc:1703
0xdee2e5 ranger_cache::entry_range(vrange&, tree_node*, basic_block_def*,
ranger_cache::rfd_mode)
../../gcc-trunk/gcc/gimple-range-cache.cc:1199
0xdee3ac ranger_cache::edge_range(vrange&, edge_def*, tree_node*,
ranger_cache::rfd_mode)
../../gcc-trunk/gcc/gimple-range-cache.cc:1230
0xded53d ranger_cache::resolve_dom(vrange&, tree_node*, basic_block_def*)
../../gcc-trunk/gcc/gimple-range-cache.cc:1689
0xdedd10 ranger_cache::range_from_dom(vrange&, tree_node*, basic_block_def*,
ranger_cache::rfd_mode)
../../gcc-trunk/gcc/gimple-range-cache.cc:1800
0xdefa2c ranger_cache::range_from_dom(vrange&, tree_node*, basic_block_def*,
ranger_cache::rfd_mode)
../../gcc-trunk/gcc/gimple-range-cache.cc:1703
0xdefa2c ranger_cache::fill_block_cache(tree_node*, basic_block_def*,
basic_block_def*)
../../gcc-trunk/gcc/gimple-range-cache.cc:1486
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.
[575] %
[575] % cat small.c
int a, b, c, d;
int main() {
unsigned long e = 10000000000;
unsigned f;
int g;
while (a) {
c = 1;
d = f;
f = ~(~(~(b && g) % a * ~e) << c);
b = e && f % e + ~f;
g = a;
}
return 0;
}
