[Bug ipa/92981] ICE in get_partitioning_class, at symtab.c:1966

[Bug ipa/92981] ICE in get_partitioning_class, at symtab.c:1966

[xerofoify at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92981

Nicholas Krause <xerofoify at gmail dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |xerofoify at gmail dot com

--- Comment #2 from Nicholas Krause <xerofoify at gmail dot com> ---
After looking through this with a debugger this seems odd to me:
if (alias && definition && !ultimate_alias_target ()->definition)

I'm not sure but after looking through it this seems to assume definition and
alias would be pointing  be true which does not seem to be the case with this
code and thus asserts here:
gcc_checking_assert (vnode->definition);

Seems this commit id,d3f2e41ea introduced it. Jan Hubicka are we certain
that definition and alias must both be true here as that does not appear 
to be the case for returning SYMBOL_EXTERNAL?

[Bug c++/92981] static anonymous union does not work

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92981

Andrew Pinski <pinskia at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
          Component|ipa                         |c++
            Summary|ICE in                      |static anonymous union does
                   |get_partitioning_class, at  |not work
                   |symtab.c:1966               |
           Keywords|                            |link-failure

--- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
I don't know if this is a front-end issue or a middle-end issue.
The problem is unrelated to LTO really.
Take:
static union {
  int yz;
  int t;
};

struct ra {
  static int &dy;
};

int &ra::dy =  (yz);

bool
bm ()
{
  return ra::dy == yz;
}

int main(void)
{
    return !bm();
}
-------- CUT -----
With just -g0, we get a link failure:
/opt/compiler-explorer/gcc-trunk-20210922/bin/../lib/gcc/x86_64-linux-gnu/12.0.0/../../../../x86_64-linux-gnu/bin/ld:
/tmp/ccBdpNQh.o:(.rodata+0x0): undefined reference to `yz'


4.1.2 produced some interesting assembly too:

        .local  yz
        .comm   yz,4,4
        .local  yz
        .comm   yz,4,4

[Bug c++/92981] static anonymous union does not work

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92981

Andrew Pinski <pinskia at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         Resolution|---                         |DUPLICATE
             Status|NEW                         |RESOLVED

--- Comment #4 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
So this is a dup of bug 53932.

*** This bug has been marked as a duplicate of bug 53932 ***