https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101625
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Last reconfirmed|2025-03-05 00:00:00 |2026-1-28
--- Comment #11 from Richard Biener <rguenth at gcc dot gnu.org> ---
Re-confirmed.
Program received signal SIGSEGV, Segmentation fault.
0x0000000001512c42 in modref_tree<int>::merge (this=0x0, max_bases=32,
max_refs=16, max_accesses=16, other=0x7ffff6664e20,
parm_map=0x7fffffff9a50 = {...}, static_chain_map=0x7fffffff9c70,
record_accesses=false, promote_unknown_to_global=false)
at /space/rguenther/src/gcc-clean/gcc/ipa-modref-tree.h:533
533 if (!other || every_base)
(gdb) p this
$1 = (modref_tree<int> * const) 0x0
#2 0x0000000001506756 in ipa_merge_modref_summary_after_inlining (
edge=<cgraph_edge* 0x7ffff680b410 (<cgraph_node * 0x7ffff669e110
"XXH64_freeState"/1> -> <cgraph_node * 0x7ffff669e770 "XXH32_freeState"/0>)>)
at /space/rguenther/src/gcc-clean/gcc/ipa-modref.cc:5404
5404 to_info->stores->merge (to->decl, callee_info->stores,
&parm_map,
(gdb) l
5399 compute_parm_map (edge, &parm_map);
5400
5401 if (!ignore_stores)
5402 {
5403 if (to_info && callee_info)
5404 to_info->stores->merge (to->decl, callee_info->stores,
&parm_map,
5405 &chain_map, false);
5406 if (to_info_lto && callee_info_lto)
5407 to_info_lto->stores->merge (to->decl,
callee_info_lto->stores,
5408 &parm_map, &chain_map, false);
what's noticeable is that we do
struct cgraph_node *to = (edge->caller->inlined_to
? edge->caller->inlined_to : edge->caller);
class modref_summary *to_info = summaries ? summaries->get (to) : NULL;
class modref_summary_lto *to_info_lto = summaries_lto
? summaries_lto->get (to) : NULL;
and
(gdb) p to_info_lto->stores
$4 = (modref_records_lto *) 0x7ffff6664de0
(gdb) p to_info->stores
$5 = (modref_records *) 0x0
and we do
bool ignore_stores = ignore_stores_p (edge>caller->decl, flags);
not t->decl here (but using that doesn't fix it).
That said, maybe !to_info->stores or !to_info_lto->stores is OK?
Honza, please have a look.
