[Bug tree-optimization/105802] New: [13 Regression] ICE: in irange_intersect, at value-range.cc:1955 with -funswitch-loops

["zsojka at seznam dot cz" <gcc-bugzilla@gcc.gnu.org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105802

            Bug ID: 105802
           Summary: [13 Regression] ICE: in irange_intersect, at
                    value-range.cc:1955 with -funswitch-loops
           Product: gcc
           Version: 13.0
            Status: UNCONFIRMED
          Keywords: ice-on-valid-code
          Severity: normal
          Priority: P3
         Component: tree-optimization
          Assignee: unassigned at gcc dot gnu.org
          Reporter: zsojka at seznam dot cz
  Target Milestone: ---
              Host: x86_64-pc-linux-gnu

Created attachment 53063
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=53063&action=edit
reduced testcase

This happens even after the PR105770 fix.

Compiler output:
$ x86_64-pc-linux-gnu-gcc -O -funswitch-loops testcase.C 
during GIMPLE pass: unswitch
testcase.C: In function 'void foo(int)':
testcase.C:9:1: internal compiler error: in irange_intersect, at
value-range.cc:1955
    9 | foo (int i)
      | ^~~
0x8f7931 irange::irange_intersect(irange const&)
        /repo/gcc-trunk/gcc/value-range.cc:1955
0x182adaf irange::intersect(vrange const&)
        /repo/gcc-trunk/gcc/value-range.h:820
0x182adaf evaluate_control_stmt_using_entry_checks
        /repo/gcc-trunk/gcc/tree-ssa-loop-unswitch.cc:691
0x182b9c1 evaluate_bbs<evaluate_loop_insns_for_predicate(loop*,
predicate_vector&, unswitch_predicate*, int, unsigned int*, unsigned
int*)::<lambda(basic_block)> >
        /repo/gcc-trunk/gcc/tree-ssa-loop-unswitch.cc:832
0x182c573 evaluate_loop_insns_for_predicate
        /repo/gcc-trunk/gcc/tree-ssa-loop-unswitch.cc:878
0x182c573 operator()
        /repo/gcc-trunk/gcc/tree-ssa-loop-unswitch.cc:915
0x182c573 evaluate_bbs<tree_unswitch_single_loop(loop*, dump_user_location_t,
predicate_vector&, unsigned int, unsigned int&, int,
bitmap)::<lambda(basic_block)> >
        /repo/gcc-trunk/gcc/tree-ssa-loop-unswitch.cc:808
0x182c573 tree_unswitch_single_loop
        /repo/gcc-trunk/gcc/tree-ssa-loop-unswitch.cc:946
0x182cec3 tree_unswitch_single_loop
        /repo/gcc-trunk/gcc/tree-ssa-loop-unswitch.cc:1006
0x182de41 tree_ssa_unswitch_loops(function*)
        /repo/gcc-trunk/gcc/tree-ssa-loop-unswitch.cc:339
Please submit a full bug report, with preprocessed source (by using
-freport-bug).
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.

$ x86_64-pc-linux-gnu-gcc -v
Using built-in specs.
COLLECT_GCC=/repo/gcc-trunk/binary-latest-amd64/bin/x86_64-pc-linux-gnu-gcc
COLLECT_LTO_WRAPPER=/repo/gcc-trunk/binary-trunk-r13-912-20220601140049-g0d5cc976a36-checking-yes-rtl-df-extra-nobootstrap-amd64/bin/../libexec/gcc/x86_64-pc-linux-gnu/13.0.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: /repo/gcc-trunk//configure --enable-languages=c,c++
--enable-valgrind-annotations --disable-nls --enable-checking=yes,rtl,df,extra
--disable-bootstrap --with-cloog --with-ppl --with-isl
--build=x86_64-pc-linux-gnu --host=x86_64-pc-linux-gnu
--target=x86_64-pc-linux-gnu --with-ld=/usr/bin/x86_64-pc-linux-gnu-ld
--with-as=/usr/bin/x86_64-pc-linux-gnu-as --disable-libstdcxx-pch
--prefix=/repo/gcc-trunk//binary-trunk-r13-912-20220601140049-g0d5cc976a36-checking-yes-rtl-df-extra-nobootstrap-amd64
Thread model: posix
Supported LTO compression algorithms: zlib zstd
gcc version 13.0.0 20220601 (experimental) (GCC)