[Bug middle-end/78809] Inline strcmp with small constant strings

[qing.zhao at oracle dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78809

--- Comment #24 from Qing Zhao <qing.zhao at oracle dot com> ---
From the above, we can see:
    even with n is as big as 20, inlined version is much faster than the
non-inlined version, both on aarch64 (no hardware string compare insn provided)
and X86 (hardware string compare insn provided)

So, it's reasonable to do the inline as much as possible.