https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87895
--- Comment #1 from Arseny Solokha <asolokha at gmx dot com> ---
And compiling the testcase w/ -O1 -fopenmp yeilds:
% x86_64-pc-linux-gnu-gcc-9.0.0-alpha20181104 -O1 -fopenmp -c i5qefyvy.c
during GIMPLE pass: local-pure-const
i5qefyvy.c: In function 'vm.simdclone.0':
i5qefyvy.c:3:1: internal compiler error: Segmentation fault
3 | vm (int oh)
| ^~
0xcce03f crash_signal
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20181104/work/gcc-9-20181104/gcc/toplev.c:325
0x74d3b3 bool is_a_helper<greturn*>::test<gimple>(gimple*)
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20181104/work/gcc-9-20181104/gcc/gimple.h:1188
0x74d3b3 bool is_a<greturn*, gimple>(gimple*)
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20181104/work/gcc-9-20181104/gcc/is-a.h:187
0x74d3b3 greturn* dyn_cast<greturn*, gimple>(gimple*)
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20181104/work/gcc-9-20181104/gcc/is-a.h:224
0x74d3b3 malloc_candidate_p
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20181104/work/gcc-9-20181104/gcc/ipa-pure-const.c:977
0x15323d6 analyze_function
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20181104/work/gcc-9-20181104/gcc/ipa-pure-const.c:1115
0x153584c execute
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20181104/work/gcc-9-20181104/gcc/ipa-pure-const.c:2095
