[Bug analyzer/93450] New: ICE in real_maxval, at real.c:2593

[asolokha at gmx dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=93450

            Bug ID: 93450
           Summary: ICE in real_maxval, at real.c:2593
           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: ---

gcc-10.0.0-alpha20200126 snapshot (g:787c79e559f5f011989b94298346d89542eb9052)
ICEs when compiling the following testcase w/ -fanalyzer:

void
ed (int);

double
bg (void)
{
  double kl = __builtin_huge_val ();

  ed (0);

  return kl;
}

% gcc-10.0.0 -fanalyzer -c mp0tmliq.c
during IPA pass: analyzer
mp0tmliq.c: In function 'bg':
mp0tmliq.c:7:10: internal compiler error: in real_maxval, at real.c:2593
    7 |   double kl = __builtin_huge_val ();
      |          ^~
0x684060 real_maxval(real_value*, int, machine_mode)
       
/var/tmp/portage/sys-devel/gcc-10.0.0_alpha20200126/work/gcc-10-20200126/gcc/real.c:2593
0x12d8415 generic_simplify_336
       
/var/tmp/portage/sys-devel/gcc-10.0.0_alpha20200126/work/build/gcc/generic-match.c:15447
0x1360c09 generic_simplify_EQ_EXPR
       
/var/tmp/portage/sys-devel/gcc-10.0.0_alpha20200126/work/build/gcc/generic-match.c:52777
0xa467b0 fold_binary_loc(unsigned int, tree_code, tree_node*, tree_node*,
tree_node*)
       
/var/tmp/portage/sys-devel/gcc-10.0.0_alpha20200126/work/gcc-10-20200126/gcc/fold-const.c:10105
0xa50a29 fold_build2_loc(unsigned int, tree_code, tree_node*, tree_node*,
tree_node*)
       
/var/tmp/portage/sys-devel/gcc-10.0.0_alpha20200126/work/gcc-10-20200126/gcc/fold-const.c:13088
0x10f791c ana::constant_svalue::eval_condition(ana::constant_svalue*,
tree_code, ana::constant_svalue*)
       
/var/tmp/portage/sys-devel/gcc-10.0.0_alpha20200126/work/gcc-10-20200126/gcc/analyzer/region-model.cc:674
0x10f16b9 ana::sm_state_map::set_state(ana::region_model*, ana::svalue_id,
unsigned int, ana::svalue_id)
       
/var/tmp/portage/sys-devel/gcc-10.0.0_alpha20200126/work/gcc-10-20200126/gcc/analyzer/program-state.cc:272
0x10f1817 ana::sm_state_map::purge_for_unknown_fncall(ana::exploded_graph
const&, ana::state_machine const&, gcall const*, tree_node*,
ana::region_model*)
       
/var/tmp/portage/sys-devel/gcc-10.0.0_alpha20200126/work/gcc-10-20200126/gcc/analyzer/program-state.cc:370
0x10e44d2 ana::exploded_node::on_stmt(ana::exploded_graph&, ana::supernode
const*, gimple const*, ana::program_state*, ana::state_change*) const
       
/var/tmp/portage/sys-devel/gcc-10.0.0_alpha20200126/work/gcc-10-20200126/gcc/analyzer/engine.cc:1039
0x10e4e61 ana::exploded_graph::process_node(ana::exploded_node*)
       
/var/tmp/portage/sys-devel/gcc-10.0.0_alpha20200126/work/gcc-10-20200126/gcc/analyzer/engine.cc:2439
0x10e5342 ana::exploded_graph::process_worklist()
       
/var/tmp/portage/sys-devel/gcc-10.0.0_alpha20200126/work/gcc-10-20200126/gcc/analyzer/engine.cc:2259
0x10e59c9 ana::impl_run_checkers(ana::logger*)
       
/var/tmp/portage/sys-devel/gcc-10.0.0_alpha20200126/work/gcc-10-20200126/gcc/analyzer/engine.cc:3580
0x10e6463 ana::run_checkers()
       
/var/tmp/portage/sys-devel/gcc-10.0.0_alpha20200126/work/gcc-10-20200126/gcc/analyzer/engine.cc:3634
0x10dbf08 execute
       
/var/tmp/portage/sys-devel/gcc-10.0.0_alpha20200126/work/gcc-10-20200126/gcc/analyzer/analyzer-pass.cc:84