[Bug c++/110997] New: [13/14 Regression] internal compiler error: in cxx_eval_constant_expression, at cp/constexpr.cc:8005

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110997

            Bug ID: 110997
           Summary: [13/14 Regression] internal compiler error: in
                    cxx_eval_constant_expression, at cp/constexpr.cc:8005
           Product: gcc
           Version: 14.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: mpolacek at gcc dot gnu.org
  Target Milestone: ---

While workin' on P2564 I found this ICE:

// P2564R3
// { dg-do compile { target c++20 } }
// From clang's cxx2b-consteval-propagate.cpp.  This test ICEd when I worked on
// P2564.

consteval int f (int);

struct S {
  int a = 0;
  int b = f (a);
};

constexpr bool
g (auto i)
{
  S s{i};
  return s.b == 2 *i;
}

consteval int
f (int i)
{
  return 2 * i;
}

void
test ()
{
  static_assert(g(42));
}


$ ./cc1plus -quiet -std=c++20 consteval-prop4.C
consteval-prop4.C: In instantiation of ‘constexpr bool g(auto:1) [with auto:1 =
int]’:
consteval-prop4.C:29:18:   required from here
consteval-prop4.C:16:5: internal compiler error: in
cxx_eval_constant_expression, at cp/constexpr.cc:8005
   16 |   S s{i};
      |     ^
0xdb5f20 cxx_eval_constant_expression
        /home/mpolacek/src/gcc/gcc/cp/constexpr.cc:8005
0xdac220 cxx_eval_indirect_ref
        /home/mpolacek/src/gcc/gcc/cp/constexpr.cc:5735
0xdb3a7a cxx_eval_constant_expression
        /home/mpolacek/src/gcc/gcc/cp/constexpr.cc:7471
0xda66a6 cxx_eval_component_reference
        /home/mpolacek/src/gcc/gcc/cp/constexpr.cc:4363
0xdb4109 cxx_eval_constant_expression
        /home/mpolacek/src/gcc/gcc/cp/constexpr.cc:7644
0xd9bc4a cxx_bind_parameters_in_call
        /home/mpolacek/src/gcc/gcc/cp/constexpr.cc:1830
0xda093c cxx_eval_call_expression
        /home/mpolacek/src/gcc/gcc/cp/constexpr.cc:2926
0xdb2626 cxx_eval_constant_expression
        /home/mpolacek/src/gcc/gcc/cp/constexpr.cc:7196
0xdb8143 cxx_eval_outermost_constant_expr
        /home/mpolacek/src/gcc/gcc/cp/constexpr.cc:8438
0xdb8dc8 cxx_constant_value(tree_node*, tree_node*, int)
        /home/mpolacek/src/gcc/gcc/cp/constexpr.cc:8594
0x1133fda bot_replace
        /home/mpolacek/src/gcc/gcc/cp/tree.cc:3302
0x1df1281 walk_tree_1(tree_node**, tree_node* (*)(tree_node**, int*, void*),
void*, hash_set<tree_node*, false, default_hash_traits<tree_node*> >*,
tree_node* (*)(tree_node**, int*, tree_node* (*)(tree_node**, int*, void*),
void*, hash_set<tree_node*, false, default_hash_traits<tree_node*> >*))
        /home/mpolacek/src/gcc/gcc/tree.cc:11341
0x113410d break_out_target_exprs(tree_node*, bool)
        /home/mpolacek/src/gcc/gcc/cp/tree.cc:3337
0xeca1b1 get_nsdmi(tree_node*, bool, int)
        /home/mpolacek/src/gcc/gcc/cp/init.cc:693
0x1189148 process_init_constructor_record
        /home/mpolacek/src/gcc/gcc/cp/typeck2.cc:1827
0x118a406 process_init_constructor
        /home/mpolacek/src/gcc/gcc/cp/typeck2.cc:2094
0x11874da digest_init_r
        /home/mpolacek/src/gcc/gcc/cp/typeck2.cc:1358
0x11876e9 digest_init_flags(tree_node*, tree_node*, int, int)
        /home/mpolacek/src/gcc/gcc/cp/typeck2.cc:1404
0x11852ac store_init_value(tree_node*, tree_node*, vec<tree_node*, va_gc,
vl_embed>**, int)
        /home/mpolacek/src/gcc/gcc/cp/typeck2.cc:848
0xe4f3af check_initializer
        /home/mpolacek/src/gcc/gcc/cp/decl.cc:7595