[Bug c++/107080] New: ICE in verify_symtab_nodes using _Float64x with long double

["jsm28 at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107080

            Bug ID: 107080
           Summary: ICE in verify_symtab_nodes using _Float64x with long
                    double
           Product: gcc
           Version: 13.0
            Status: UNCONFIRMED
          Keywords: ice-on-valid-code
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: jsm28 at gcc dot gnu.org
                CC: jakub at gcc dot gnu.org
  Target Milestone: ---
            Target: x86_64-* i?86-* ia64-*

Compiling the following C++ test for x86_64 (or i686 or ia64) produces an ICE,
no optimization or other options required (presumably introduced by the _FloatN
/ _FloatNx support for C++).


template<typename> struct S;

template<> struct S<long double>
{
  static int call (long double x, long double y) throw ()
  {
    return 3;
  }
};

template<> struct S<_Float64x>
{
  static int call (_Float64x x, _Float64x y) throw ()
  {
    return 3;
  }
};

template<typename T1, typename T2>
inline int
g (T1 x, T2 y) throw ()
{
  typedef decltype (x + y) T3;
  return S<T3>::call (x, y);
}

int
f ()
{
  return g (0.0f64x, 0.0f64x) + g (0.0f64x, 0.0L);
}



t.cc:31:1: error: Two symbols with same comdat_group are not linked by the
same_comdat_group list.
   31 | }
      | ^
_Z1gIeeEiT_T0_/4 (int g(T1, T2) [with T1 = _Float64x; T2 = long double])
  Type: function definition analyzed
  Visibility: semantic_interposition no_reorder public weak comdat
comdat_group:_Z1gIeeEiT_T0_ one_only
  previous sharing asm name: 3
  References: __gxx_personality_v0/5 (addr) 
  Referring: 
  Function flags: body
  Called by: _Z1fv/2 
  Calls: _ZN1SIeE4callEee/1 
_Z1gIeeEiT_T0_/3 (int g(T1, T2) [with T1 = _Float64x; T2 = _Float64x])
  Type: function definition analyzed
  Visibility: semantic_interposition no_reorder public weak comdat
comdat_group:_Z1gIeeEiT_T0_ one_only
  next sharing asm name: 4
  References: __gxx_personality_v0/5 (addr) 
  Referring: 
  Function flags: body
  Called by: _Z1fv/2 
  Calls: _ZN1SIeE4callEee/1 
t.cc:31:1: internal compiler error: symtab_node::verify failed
0xc9ba69 symtab_node::verify_symtab_nodes()
        /scratch/jmyers/glibc/many13/src/gcc/gcc/symtab.cc:1410
0xcb4ab3 symtab_node::checking_verify_symtab_nodes()
        /scratch/jmyers/glibc/many13/src/gcc/gcc/cgraph.h:682
0xcb4ab3 symbol_table::compile()
        /scratch/jmyers/glibc/many13/src/gcc/gcc/cgraphunit.cc:2264
0xcb80cd symbol_table::compile()
        /scratch/jmyers/glibc/many13/src/gcc/gcc/cgraphunit.cc:2261
0xcb80cd symbol_table::finalize_compilation_unit()
        /scratch/jmyers/glibc/many13/src/gcc/gcc/cgraphunit.cc:2529
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