[Bug bootstrap/78188] [7 Regression] AIX Bootstrap broken by tree-vrp.c change

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78188

--- Comment #12 from Richard Biener <rguenth at gcc dot gnu.org> ---
Breakpoint 8, symtab_node::set_comdat_group (this=0x2aaaaf05ea10, 
    group=<identifier_node 0x2aaaaf3d4370
_ZN10hash_tableI13vn_phi_hasher11xcallocatorE19find_slot_with_hashERKP8vn_phi_sj13insert_option>)
    at /space/rguenther/src/gcc-git/gcc/cgraph.h:218
218                                || DECL_P (group));
(gdb) p this->decl
$17 = <function_decl 0x2aaaaff46d00 _ZL11vn_valueizeP9tree_node.part.80>

from IPA comdat.

Now trying to reduce the testcase.