https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101697
--- Comment #2 from Jeffrey A. Law <law at gcc dot gnu.org> ---
I can't reproduce this on the trunk or with the referenced git hashes.
(insn 1444 1443 164 31 (parallel [
(set (mem/f:SI (pre_dec:SI (reg/f:SI 7 sp)) [3 S4 A32])
(reg/f:SI 7 sp))
(clobber (reg:CC 12 cc))
]) "libc/inet/getaddrinfo.c":466:11 -1
(expr_list:REG_ARGS_SIZE (const_int 4 [0x4])
(nil)))
I'm pretty sure this is ill-formed though. The register inside the
auto-increment addressing mode isn't allowed to be used elsewhere in the same
insn. In particular note that we have (pre_dec (reg sp)) and another reference
to (reg sp) in the same insn.
I would probably start by identifying when that happens in the dumps.
