[Bug tree-optimization/87280] New: [9 Regression] ICE in set_ssa_val_to, at tree-ssa-sccvn.c:3647

[asolokha at gmx dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87280

            Bug ID: 87280
           Summary: [9 Regression] ICE in set_ssa_val_to, at
                    tree-ssa-sccvn.c:3647
           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: ---

Created attachment 44677
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44677&action=edit
Testcase

gcc-9.0.0-alpha20180909 snapshot (r264185) ICEs when compiling the attached
snippet w/ -O2 (-Os, -O3, -Ofast) --param rpo-vn-max-loop-depth=5:

% gcc-9.0.0-alpha20180909 -O2 --param rpo-vn-max-loop-depth=5 -w -c rilo1emt.c 
during GIMPLE pass: fre
rilo1emt.c: In function 'j8':
rilo1emt.c:58:1: internal compiler error: in set_ssa_val_to, at
tree-ssa-sccvn.c:3647
58 | }
   | ^
0x699fa5 set_ssa_val_to
       
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20180909/work/gcc-9-20180909/gcc/tree-ssa-sccvn.c:3647
0xe63d78 visit_phi
       
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20180909/work/gcc-9-20180909/gcc/tree-ssa-sccvn.c:4261
0xe6435f visit_stmt
       
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20180909/work/gcc-9-20180909/gcc/tree-ssa-sccvn.c:4304
0xe65e89 process_bb
       
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20180909/work/gcc-9-20180909/gcc/tree-ssa-sccvn.c:5923
0xe671a8 do_rpo_vn
       
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20180909/work/gcc-9-20180909/gcc/tree-ssa-sccvn.c:6454
0xe67f8c execute
       
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20180909/work/gcc-9-20180909/gcc/tree-ssa-sccvn.c:6646