[Bug rtl-optimization/85852] ICE: Segmentation fault (in contains_struct_check)

[asolokha at gmx dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85852

--- Comment #1 from Arseny Solokha <asolokha at gmx dot com> ---
Here's a testcase w/o zero division:

void
ki (double nq)
{
  double zo = 1.1 * nq - nq;
}

% gcc-9.0.0-alpha20180520 -mfma -O2 -fexceptions -fnon-call-exceptions -c
pr85852-1.c
during RTL pass: expand
pr85852-1.c: In function 'ki':
pr85852-1.c:4:10: internal compiler error: Segmentation fault
   double zo = 1.1 * nq - nq;
          ^~
0xc9b59f crash_signal
       
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20180520/work/gcc-9-20180520/gcc/toplev.c:325
0xa95733 contains_struct_check(tree_node*, tree_node_structure_enum, char
const*, int, char const*)
       
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20180520/work/gcc-9-20180520/gcc/tree.h:3248
0xa95733 expand_direct_optab_fn
       
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20180520/work/gcc-9-20180520/gcc/internal-fn.c:2894
0x87e757 expand_call_stmt
       
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20180520/work/gcc-9-20180520/gcc/cfgexpand.c:2598
0x87e757 expand_gimple_stmt_1
       
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20180520/work/gcc-9-20180520/gcc/cfgexpand.c:3644
0x87e757 expand_gimple_stmt
       
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20180520/work/gcc-9-20180520/gcc/cfgexpand.c:3810
0x87fd9c expand_gimple_tailcall
       
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20180520/work/gcc-9-20180520/gcc/cfgexpand.c:3856
0x87fd9c expand_gimple_basic_block
       
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20180520/work/gcc-9-20180520/gcc/cfgexpand.c:5812
0x884837 execute
       
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20180520/work/gcc-9-20180520/gcc/cfgexpand.c:6441