[Bug tree-optimization/82492] [6/7 Regression] ICE: Segmentation fault

[trippels at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82492

--- Comment #5 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
0xad530f crash_signal
        ../../gcc-7.2.0/gcc/toplev.c:337
0xc2bbd8 gcond* dyn_cast<gcond*, gimple>(gimple*)
        ../../gcc-7.2.0/gcc/is-a.h:219
0xc2bbd8 vn_phi_lookup
        ../../gcc-7.2.0/gcc/tree-ssa-sccvn.c:3087
0xc2bbd8 visit_phi
        ../../gcc-7.2.0/gcc/tree-ssa-sccvn.c:3882
0xc2bbd8 visit_use
        ../../gcc-7.2.0/gcc/tree-ssa-sccvn.c:3948
0xc2c870 process_scc
        ../../gcc-7.2.0/gcc/tree-ssa-sccvn.c:4296
0xc2c870 extract_and_process_scc_for_name
        ../../gcc-7.2.0/gcc/tree-ssa-sccvn.c:4352
0xc2c870 DFS
        ../../gcc-7.2.0/gcc/tree-ssa-sccvn.c:4404
0xc2d766 sccvn_dom_walker::before_dom_children(basic_block_def*)
        ../../gcc-7.2.0/gcc/tree-ssa-sccvn.c:4857
0x10beb0a dom_walker::walk(basic_block_def*)
        ../../gcc-7.2.0/gcc/domwalk.c:265
0xc2e32a run_scc_vn(vn_lookup_kind)
        ../../gcc-7.2.0/gcc/tree-ssa-sccvn.c:4981
0xc03744 execute
        ../../gcc-7.2.0/gcc/tree-ssa-pre.c:5201