[Bug analyzer/95042] New: ICE in can_merge_p, at analyzer/region-model.cc:2053

[Bug analyzer/95042] New: ICE in can_merge_p, at analyzer/region-model.cc:2053

[asolokha at gmx dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95042

            Bug ID: 95042
           Summary: ICE in can_merge_p, at analyzer/region-model.cc:2053
           Product: gcc
           Version: 10.0
            Status: UNCONFIRMED
          Keywords: ice-on-valid-code
          Severity: normal
          Priority: P3
         Component: analyzer
          Assignee: dmalcolm at gcc dot gnu.org
          Reporter: asolokha at gmx dot com
  Target Milestone: ---

g++-10.1.0-RC-20200430 ICEs when compiling the following testcase w/ -O1
-fanalyzer:

class kz {
public:
  kz ();

private:
  int yu;
};

const kz vl;
kz ax;

void
c1 (bool va, bool ze)
{
  kz ny, fb = vl;

  if (va)
    {
      if (ze)
        ny = vl;

      fb = ny;
    }

  ax = fb;
}

% g++-10.1.0 -O1 -fanalyzer -c qjxbb0xt.cpp
during IPA pass: analyzer
qjxbb0xt.cpp: In function 'void c1(bool, bool)':
qjxbb0xt.cpp:22:10: internal compiler error: in can_merge_p, at
analyzer/region-model.cc:2053
   22 |       fb = ny;
      |       ~~~^~~~
0x7e1592 ana::map_region::can_merge_p(ana::map_region const*, ana::map_region
const*, ana::map_region*, ana::region_id, ana::model_merger*)
       
/var/tmp/portage/sys-devel/gcc-10.1.0_rc20200430/work/gcc-10.1.0-RC-20200430/gcc/analyzer/region-model.cc:2053
0x13714a2 ana::map_region::can_merge_p(ana::map_region const*, ana::map_region
const*, ana::map_region*, ana::region_id, ana::model_merger*)
       
/var/tmp/portage/sys-devel/gcc-10.1.0_rc20200430/work/gcc-10.1.0-RC-20200430/gcc/analyzer/region-model.cc:2085
0x1371a5f ana::stack_region::can_merge_p(ana::stack_region const*,
ana::stack_region const*, ana::model_merger*)
       
/var/tmp/portage/sys-devel/gcc-10.1.0_rc20200430/work/gcc-10.1.0-RC-20200430/gcc/analyzer/region-model.cc:2904
0x1371dfc ana::stack_region::can_merge_p(ana::stack_region const*,
ana::stack_region const*, ana::model_merger*)
       
/var/tmp/portage/sys-devel/gcc-10.1.0_rc20200430/work/gcc-10.1.0-RC-20200430/gcc/vec.h:1411
0x1371dfc ana::root_region::can_merge_p(ana::root_region const*,
ana::root_region const*, ana::root_region*, ana::model_merger*)
       
/var/tmp/portage/sys-devel/gcc-10.1.0_rc20200430/work/gcc-10.1.0-RC-20200430/gcc/analyzer/region-model.cc:3311
0x1371f42 ana::region_model::can_merge_with_p(ana::region_model const&,
ana::region_model*, ana::svalue_id_merger_mapping*) const
       
/var/tmp/portage/sys-devel/gcc-10.1.0_rc20200430/work/gcc-10.1.0-RC-20200430/gcc/analyzer/region-model.cc:6823
0x135f09e ana::program_state::can_merge_with_p(ana::program_state const&,
ana::extrinsic_state const&, ana::program_state*) const
       
/var/tmp/portage/sys-devel/gcc-10.1.0_rc20200430/work/gcc-10.1.0-RC-20200430/gcc/analyzer/program-state.cc:1011
0x134d1db ana::exploded_graph::get_or_create_node(ana::program_point const&,
ana::program_state const&, ana::state_change*)
       
/var/tmp/portage/sys-devel/gcc-10.1.0_rc20200430/work/gcc-10.1.0-RC-20200430/gcc/analyzer/engine.cc:1970
0x1350b42 ana::exploded_graph::process_node(ana::exploded_node*)
       
/var/tmp/portage/sys-devel/gcc-10.1.0_rc20200430/work/gcc-10.1.0-RC-20200430/gcc/analyzer/engine.cc:2547
0x135131a ana::exploded_graph::process_worklist()
       
/var/tmp/portage/sys-devel/gcc-10.1.0_rc20200430/work/gcc-10.1.0-RC-20200430/gcc/analyzer/engine.cc:2348
0x1351a4b ana::impl_run_checkers(ana::logger*)
       
/var/tmp/portage/sys-devel/gcc-10.1.0_rc20200430/work/gcc-10.1.0-RC-20200430/gcc/analyzer/engine.cc:4029
0x135261c ana::run_checkers()
       
/var/tmp/portage/sys-devel/gcc-10.1.0_rc20200430/work/gcc-10.1.0-RC-20200430/gcc/analyzer/engine.cc:4097
0x13471b8 execute
       
/var/tmp/portage/sys-devel/gcc-10.1.0_rc20200430/work/gcc-10.1.0-RC-20200430/gcc/analyzer/analyzer-pass.cc:84

[Bug analyzer/95042] ICE in can_merge_p, at analyzer/region-model.cc:2053

[marxin at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95042

Martin Liška <marxin at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |ASSIGNED
                 CC|                            |marxin at gcc dot gnu.org
     Ever confirmed|0                           |1
   Last reconfirmed|                            |2020-05-11

--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
Started with r10-7502-ga96f1c38a787fbc8.

[Bug analyzer/95042] ICE in can_merge_p, at analyzer/region-model.cc:2053

[david.bolvansky at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95042

Dávid Bolvanský <david.bolvansky at gmail dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |david.bolvansky at gmail dot com

--- Comment #2 from Dávid Bolvanský <david.bolvansky at gmail dot com> ---
compilation of zstd fails with this error too

[Bug analyzer/95042] ICE in can_merge_p, at analyzer/region-model.cc:2053

[dmalcolm at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95042

David Malcolm <dmalcolm at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         Resolution|---                         |FIXED
             Status|ASSIGNED                    |RESOLVED

--- Comment #3 from David Malcolm <dmalcolm at gcc dot gnu.org> ---
The ICE should be fixed by g:808f4dfeb3a95f50f15e71148e5c1067f90a126d (for GCC
11).  Marking this as fixed.