https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89572
Bug ID: 89572
Summary: ICE in dyn_cast<gcond*, gimple>(gimple*) /
get_loop_exit_condition(loop const*)
Product: gcc
Version: 9.0
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: ---
Another __attribute__((returns_twice)) issue.
gcc-9.0.0-alpha20190303 snapshot (r269357), 8.3, 7.3, 6.3, 5.4, 4.9.4 all ICE
when compiling the following testcase w/ -O2 -finline-functions:
int vh, it, k1;
void
vn (void)
{
++vh;
if (vh == 0 && it == 0)
k1 = -k1;
}
__attribute__ ((returns_twice)) void
ef (int *uw)
{
while (uw != (void *) 0)
{
vn ();
*uw = 0;
}
}
void
gu (int *uw)
{
ef (uw);
}
% gcc-9.0.0-alpha20190303 -O2 -finline-functions -c qnf39r7s.c
during GIMPLE pass: ivopts
qnf39r7s.c: In function 'gu':
qnf39r7s.c:22:1: internal compiler error: Segmentation fault
22 | gu (int *uw)
| ^~
0xd6fc4f crash_signal
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20190303/work/gcc-9-20190303/gcc/toplev.c:326
0xe4314d gcond* dyn_cast<gcond*, gimple>(gimple*)
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20190303/work/gcc-9-20190303/gcc/is-a.h:224
0xe4314d get_loop_exit_condition(loop const*)
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20190303/work/gcc-9-20190303/gcc/tree-scalar-evolution.c:913
0xfe2e27 find_loop_location(loop*)
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20190303/work/gcc-9-20190303/gcc/tree-vect-loop-manip.c:1322
0xec2e52 tree_ssa_iv_optimize_loop
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20190303/work/gcc-9-20190303/gcc/tree-ssa-loop-ivopts.c:7538
0xec2e52 tree_ssa_iv_optimize()
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20190303/work/gcc-9-20190303/gcc/tree-ssa-loop-ivopts.c:7628
0xee1f80 execute
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20190303/work/gcc-9-20190303/gcc/tree-ssa-loop.c:513
