[Bug rtl-optimization/114674] [aarch64] ldp_fusion fails to merge 2 strs due to imprecise alignment info

[dizhao at os dot amperecomputing.com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114674

--- Comment #5 from Di Zhao <dizhao at os dot amperecomputing.com> ---
Yes it's better to take a maximum MEM_ALIGN. I've missed that. Thanks.