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From: "asolokha at gmx dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug ipa/108509] New: [13 Regression] ICE in add, at hash-set.h:64
Date: Tue, 24 Jan 2023 06:52:37 +0000
X-Bugzilla-Reason: CC
X-Bugzilla-Type: new
X-Bugzilla-Watch-Reason: None
X-Bugzilla-Product: gcc
X-Bugzilla-Component: ipa
X-Bugzilla-Version: 13.0
X-Bugzilla-Keywords: ice-on-valid-code
X-Bugzilla-Severity: normal
X-Bugzilla-Who: asolokha at gmx dot com
X-Bugzilla-Status: UNCONFIRMED
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X-Bugzilla-Priority: P3
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D108509

            Bug ID: 108509
           Summary: [13 Regression] ICE in add, at hash-set.h:64
           Product: gcc
           Version: 13.0
            Status: UNCONFIRMED
          Keywords: ice-on-valid-code
          Severity: normal
          Priority: P3
         Component: ipa
          Assignee: unassigned at gcc dot gnu.org
          Reporter: asolokha at gmx dot com
                CC: marxin at gcc dot gnu.org
  Target Milestone: ---

gcc 13.0.1 20230122 snapshot (g:844eab81da3f49da88e8bb02e2b1255ba88d02b0) I=
CEs
when compiling the following testcase, reduced from
test/CodeGenCXX/vtable-available-externally.cpp from the clang 15 test suit=
e,
w/ -O1 -fdevirtualize -fno-tree-fre:

struct B {
  virtual void deref ();
};

struct RefPtr {
  B *p;

  RefPtr ()
  {
    p->deref ();
  }
};

void
f ()
{
  RefPtr b;
}

% g++-13 -O1 -fdevirtualize -fno-tree-fre -c ce52fpmj.cpp
during IPA pass: remove_symbols
ce52fpmj.cpp:18:1: internal compiler error: in add, at hash-set.h:64
   18 | }
      | ^
0x7fa104 hash_set<symtab_node*, false, default_hash_traits<symtab_node*>
>::add(symtab_node* const&)
=20=20=20=20=20=20=20
/var/tmp/portage/sys-devel/gcc-13.0.1_p20230122/work/gcc-13-20230122/gcc/ha=
sh-set.h:64
0x7faaf4 hash_set<void*, false, default_hash_traits<void*> >::add(void* con=
st&)
=20=20=20=20=20=20=20
/var/tmp/portage/sys-devel/gcc-13.0.1_p20230122/work/gcc-13-20230122/gcc/tr=
ee.h:3644
0x7faaf4 walk_polymorphic_call_targets
=20=20=20=20=20=20=20
/var/tmp/portage/sys-devel/gcc-13.0.1_p20230122/work/gcc-13-20230122/gcc/ip=
a.cc:185
0x7faaf4 symbol_table::remove_unreachable_nodes(_IO_FILE*)
=20=20=20=20=20=20=20
/var/tmp/portage/sys-devel/gcc-13.0.1_p20230122/work/gcc-13-20230122/gcc/ip=
a.cc:430
0x1108079 execute_todo
=20=20=20=20=20=20=20
/var/tmp/portage/sys-devel/gcc-13.0.1_p20230122/work/gcc-13-20230122/gcc/pa=
sses.cc:2159=