https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70007
--- Comment #4 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
It's load motion: compute_ld_motion_mems fails to invalidate the MEM in the
REG_EQUAL note of
(insn 7 6 8 3 (parallel [
(set (reg:DI 88 [ _4 ])
(rotatert:DI (reg:DI 117 [ v32u64_1+24 ])
(const_int 19 [0x13])))
(clobber (reg:CC 17 flags))
]) pr70007.c:10 607 {*rotrdi3_1}
(expr_list:REG_DEAD (reg:DI 117 [ v32u64_1+24 ])
(expr_list:REG_UNUSED (reg:CC 17 flags)
(expr_list:REG_EQUAL (rotatert:DI (mem/j/c:DI (plus:DI (reg/f:DI 16
argp)
(const_int 88 [0x58])) [1 v32u64_1+24 S8 A64])
(const_int 19 [0x13]))
(nil)))))
because the PATTERN is not a SET.
