[Bug tree-optimization/87219] New: [9 Regression] internal compiler error: in check_loop_closed_ssa_def, at tree-ssa-loop-manip.c:709

[hjl.tools at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87219

            Bug ID: 87219
           Summary: [9 Regression] internal compiler error: in
                    check_loop_closed_ssa_def, at
                    tree-ssa-loop-manip.c:709
           Product: gcc
           Version: 9.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: tree-optimization
          Assignee: unassigned at gcc dot gnu.org
          Reporter: hjl.tools at gmail dot com
                CC: rguenther at suse dot de
  Target Milestone: ---

On x86-64, r264069 failed to build 200.sixtrack from SPEC CPU 2000:

[hjl@gnu-35 00000002]$ /export/gnu/import/git/gcc-test-spec/usr/bin/-c -o
clor6.o   -DSPEC_CPU2000_LP64         -O3 -funroll-loops -ffast-math   clor6.f
bash: /export/gnu/import/git/gcc-test-spec/usr/bin/-c: No such file or
directory
[hjl@gnu-35 00000002]$ /export/gnu/import/git/gcc-test-spec/usr/bin/gfortran -c
-o clor6.o   -DSPEC_CPU2000_LP64         -O3 -funroll-loops -ffast-math  
clor6.f
during GIMPLE pass: cunroll
clor6.f:3:0:

3 |       subroutine clor6
  | 
internal compiler error: in check_loop_closed_ssa_def, at
tree-ssa-loop-manip.c:709
0x6b272c check_loop_closed_ssa_def
        ../../src-trunk/gcc/tree-ssa-loop-manip.c:709
0xe792b0 check_loop_closed_ssa_bb
        ../../src-trunk/gcc/tree-ssa-loop-manip.c:735
0xe7b376 verify_loop_closed_ssa(bool, loop*)
        ../../src-trunk/gcc/tree-ssa-loop-manip.c:760
0xe64bda tree_unroll_loops_completely
        ../../src-trunk/gcc/tree-ssa-loop-ivcanon.c:1493
0xe64c54 execute
        ../../src-trunk/gcc/tree-ssa-loop-ivcanon.c:1597
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
[hjl@gnu-35 00000002]$