https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96639
Bug ID: 96639
Summary: [11 Regression] ICE: Segmentation fault (in
useless_type_conversion_p)
Product: gcc
Version: 11.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: analyzer
Assignee: dmalcolm at gcc dot gnu.org
Reporter: asolokha at gmx dot com
Target Milestone: ---
gcc-11.0.0-alpha20200816 snapshot (g:c99116aeeb9644ebddec653ee8b19de4d38b65bd)
ICEs when compiling the following testcase w/ -fanalyzer:
void *
calloc (__SIZE_TYPE__, __SIZE_TYPE__);
int
x7 (void)
{
int **md = calloc (1, 1);
return md[0][0];
}
% gcc-11.0.0 -fanalyzer -c at88dqtc.c
during IPA pass: analyzer
at88dqtc.c: In function 'x7':
at88dqtc.c:9:15: internal compiler error: Segmentation fault
9 | return md[0][0];
| ~~~~~^~~
0xd7da1f crash_signal
/var/tmp/portage/sys-devel/gcc-11.0.0_alpha20200816/work/gcc-11-20200816/gcc/toplev.c:327
0xab1798 useless_type_conversion_p(tree_node*, tree_node*)
/var/tmp/portage/sys-devel/gcc-11.0.0_alpha20200816/work/gcc-11-20200816/gcc/gimple-expr.c:71
0x1108dce types_compatible_p
/var/tmp/portage/sys-devel/gcc-11.0.0_alpha20200816/work/gcc-11-20200816/gcc/gimple-expr.h:67
0x1108dce ana::region::get_subregions_for_binding(ana::region_model_manager*,
generic_wide_int<fixed_wide_int_storage<128> >,
generic_wide_int<fixed_wide_int_storage<128> >, tree_node*,
auto_vec<ana::region const*, 0ul>*) const
/var/tmp/portage/sys-devel/gcc-11.0.0_alpha20200816/work/gcc-11-20200816/gcc/analyzer/region.cc:262
0x113822c ana::binding_cluster::get_representative_path_vars(ana::region_model
const*, hash_set<ana::svalue const*, false, default_hash_traits<ana::svalue
const*> >*, ana::region const*, ana::svalue const*, auto_vec<ana::path_var,
0ul>*) const
/var/tmp/portage/sys-devel/gcc-11.0.0_alpha20200816/work/gcc-11-20200816/gcc/analyzer/store.cc:1121
0x11392e7 ana::store::get_representative_path_vars(ana::region_model const*,
hash_set<ana::svalue const*, false, default_hash_traits<ana::svalue const*> >*,
ana::svalue const*, auto_vec<ana::path_var, 0ul>*) const
/var/tmp/portage/sys-devel/gcc-11.0.0_alpha20200816/work/gcc-11-20200816/gcc/analyzer/store.cc:1805
0x110dc5d ana::region_model::get_representative_path_var(ana::svalue const*,
hash_set<ana::svalue const*, false, default_hash_traits<ana::svalue const*> >*)
const
/var/tmp/portage/sys-devel/gcc-11.0.0_alpha20200816/work/gcc-11-20200816/gcc/analyzer/region-model.cc:1806
0x110e3a7 ana::region_model::get_representative_tree(ana::svalue const*) const
/var/tmp/portage/sys-devel/gcc-11.0.0_alpha20200816/work/gcc-11-20200816/gcc/analyzer/region-model.cc:1851
0x10f8474 ana::impl_sm_context::get_diagnostic_tree(tree_node*)
/var/tmp/portage/sys-devel/gcc-11.0.0_alpha20200816/work/gcc-11-20200816/gcc/analyzer/engine.cc:295
0x11320df on_stmt
/var/tmp/portage/sys-devel/gcc-11.0.0_alpha20200816/work/gcc-11-20200816/gcc/analyzer/sm-malloc.cc:805
0x10f318f ana::exploded_node::on_stmt(ana::exploded_graph&, ana::supernode
const*, gimple const*, ana::program_state*) const
/var/tmp/portage/sys-devel/gcc-11.0.0_alpha20200816/work/gcc-11-20200816/gcc/analyzer/engine.cc:1098
0x10f426d ana::exploded_graph::process_node(ana::exploded_node*)
/var/tmp/portage/sys-devel/gcc-11.0.0_alpha20200816/work/gcc-11-20200816/gcc/analyzer/engine.cc:2526
0x10f4d5a ana::exploded_graph::process_worklist()
/var/tmp/portage/sys-devel/gcc-11.0.0_alpha20200816/work/gcc-11-20200816/gcc/analyzer/engine.cc:2341
0x10f6e8f ana::impl_run_checkers(ana::logger*)
/var/tmp/portage/sys-devel/gcc-11.0.0_alpha20200816/work/gcc-11-20200816/gcc/analyzer/engine.cc:4107
0x10f7aac ana::run_checkers()
/var/tmp/portage/sys-devel/gcc-11.0.0_alpha20200816/work/gcc-11-20200816/gcc/analyzer/engine.cc:4175
0x10ec468 execute
/var/tmp/portage/sys-devel/gcc-11.0.0_alpha20200816/work/gcc-11-20200816/gcc/analyzer/analyzer-pass.cc:84
