[Bug c++/87373] Packed structs are not handled properly on ARM architecture even with misaligned access is enabled

[umesh.kalappa0 at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87373

--- Comment #3 from Umesh Kalappa <umesh.kalappa0 at gmail dot com> ---
With -O0 , i see the byte load /store like

 push    {r7}
        sub     sp, sp, #12
        add     r7, sp, #0
        ldr     r2, .L3
        mov     r3, r7
        str     r3, [r2]
        ldr     r3, .L3
        ldr     r3, [r3]
        ldrb    r2, [r3]
        movs    r2, #0
        orr     r2, r2, #1
        strb    r2, [r3]
        ldrb    r2, [r3, #1]
        movs    r2, #0
        orr     r2, r2, #4
        strb    r2, [r3, #1]
        ldrb    r2, [r3, #2]
        movs    r2, #0
        strb    r2, [r3, #2]
        ldrb    r2, [r3, #3]
        movs    r2, #0
        strb    r2, [r3, #3]
        ldr     r3, .L3
        ldr     r3, [r3]
        ldr     r2, [r3]        @ unaligned
        ldr     r3, .L3
        ldr     r3, [r3]
        uxtb    r2, r2
        strb    r2, [r3, #4]
        ldr     r3, .L3
        ldr     r3, [r3]
        ldrb    r3, [r3, #4]    @ zero_extendqisi2
        mov     r0, r3
        adds    r7, r7, #12
        mov     sp, r7
        @ sp needed
        pop     {r7}
        bx      lr

but ,why you are compiling with -O0 , any reason such ?