https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111382
Andrew Pinski <pinskia at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|UNCONFIRMED |NEW Ever confirmed|0 |1 Last reconfirmed| |2023-09-17 --- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> --- Confirmed. .UBSAN_NULL (test_addr_6, 0B, 8); .UBSAN_PTR (test_addr_6, 4); i64_9 = MEM[(int64_t *)test_addr_6 + 4B]; It is UBSAN_NULL which I think is expanding to test against 8 byte alignment ...