https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106866
Bug ID: 106866
Summary: [13 Regression] ICE in
predicate::init_from_control_deps
Product: gcc
Version: 13.0
Status: UNCONFIRMED
Keywords: ice-on-valid-code
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: asolokha at gmx dot com
Target Milestone: ---
gcc 13.0.0 20220904 snapshot (g:20d30e737ad79dc36817e59f1676aa8bc0c6b325) ICEs
when compiling the following testcase w/ -O1 -fno-ipa-pure-const
-Wuninitialized:
int n;
void
empty (int)
{
}
int
bar (int x)
{
return n + x + 1;
}
__attribute__ ((pure, returns_twice)) int
foo (void)
{
int uninitialized;
if (n)
{
if (bar (0))
return 0;
__builtin_unreachable ();
}
while (uninitialized < 1)
{
foo ();
empty (bar (0) == foo ());
++uninitialized;
}
return 0;
}
% gcc-13.0.0 -O1 -fno-ipa-pure-const -Wuninitialized -c ur6q8z0f.c
during GIMPLE pass: uninit
ur6q8z0f.c: In function 'foo':
ur6q8z0f.c:15:1: internal compiler error: Segmentation fault
15 | foo (void)
| ^~~
0xee887f crash_signal
/var/tmp/portage/sys-devel/gcc-13.0.0_p20220904/work/gcc-13-20220904/gcc/toplev.cc:314
0x1d1e068 gimple_code
/var/tmp/portage/sys-devel/gcc-13.0.0_p20220904/work/gcc-13-20220904/gcc/gimple.h:1806
0x1d1e068 predicate::init_from_control_deps(vec<edge_def*, va_heap, vl_ptr>
const*, unsigned int, bool)
/var/tmp/portage/sys-devel/gcc-13.0.0_p20220904/work/gcc-13-20220904/gcc/gimple-predicate-analysis.cc:1734
0x1d1eec8 predicate::init_from_control_deps(vec<edge_def*, va_heap, vl_ptr>
const*, unsigned int, bool)
/var/tmp/portage/sys-devel/gcc-13.0.0_p20220904/work/gcc-13-20220904/gcc/gimple-predicate-analysis.cc:1680
0x1d1eec8 uninit_analysis::init_use_preds(predicate&, basic_block_def*,
basic_block_def*)
/var/tmp/portage/sys-devel/gcc-13.0.0_p20220904/work/gcc-13-20220904/gcc/gimple-predicate-analysis.cc:1946
0x1d22250 uninit_analysis::is_use_guarded(gimple*, basic_block_def*, gphi*,
unsigned int, hash_set<gphi*, false, default_hash_traits<gphi*> >*)
/var/tmp/portage/sys-devel/gcc-13.0.0_p20220904/work/gcc-13-20220904/gcc/gimple-predicate-analysis.cc:2095
0x1d22869 uninit_analysis::is_use_guarded(gimple*, basic_block_def*, gphi*,
unsigned int)
/var/tmp/portage/sys-devel/gcc-13.0.0_p20220904/work/gcc-13-20220904/gcc/gimple-predicate-analysis.cc:2136
0x113d741 find_uninit_use
/var/tmp/portage/sys-devel/gcc-13.0.0_p20220904/work/gcc-13-20220904/gcc/tree-ssa-uninit.cc:1238
0x113e08e warn_uninitialized_phi
/var/tmp/portage/sys-devel/gcc-13.0.0_p20220904/work/gcc-13-20220904/gcc/tree-ssa-uninit.cc:1308
0x113e08e execute_late_warn_uninitialized
/var/tmp/portage/sys-devel/gcc-13.0.0_p20220904/work/gcc-13-20220904/gcc/tree-ssa-uninit.cc:1426
0x113e08e execute
/var/tmp/portage/sys-devel/gcc-13.0.0_p20220904/work/gcc-13-20220904/gcc/tree-ssa-uninit.cc:1442
