[Bug target/102125] (ARM Cortex-M3 and newer) missed optimization. memcpy not needed operations

[jankowski938 at gmail dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102125

--- Comment #4 from Piotr <jankowski938 at gmail dot com> ---
        mov     r3, r0
        ldr     r0, [r0]  @ unaligned
        ldr     r1, [r3, #4]      @ unaligned
        bx      lr

can be optimized even more 

        ldr     r1, [r0, #4]      @ unaligned
        ldr     r0, [r0]  @ unaligned
        bx      lr