https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113180
Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target|mips aarch64*-*-* |mips aarch64*-*-* arm*-*
--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
arm is just as bad:
```
xx:
@ args = 8, pretend = 0, frame = 8
@ frame_needed = 0, uses_anonymous_args = 0
@ link register save eliminated.
sub sp, sp, #8
mov r3, r0
strd r1, r2, [sp]
ldr r1, [sp, #8]
ldrb r2, [sp, #7] @ zero_extendqisi2
bfi r2, r1, #4, #4
strb r2, [sp, #7]
ldrd r0, r1, [sp]
stm r3, {r0, r1}
mov r0, r3
add sp, sp, #8
@ sp needed
bx lr
```
Basically the variable a is stored to the stack and then modified and then
stored to the stack and then loaded and stored to the return location.
This is all due to STRICT alignment IIRC.
