https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102162
--- Comment #12 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Here is what the first testcase looks like at -O1 -mstrict-align on
aarch64-linux-gnu for GCC 10.3.0:
test:
.LFB1:
.cfi_startproc
adrp x0, output_len
add x1, x0, :lo12:output_len
ldrb w2, [x0, #:lo12:output_len]
ldrb w0, [x1, 1]
orr x2, x2, x0, lsl 8
ldrb w0, [x1, 2]
orr x0, x2, x0, lsl 16
ldrb w1, [x1, 3]
orr w0, w0, w1, lsl 24
ret
.cfi_endproc
.LFE1:
.size test, .-test
.ident "GCC: (GNU) 10.3.0"
.section .note.GNU-stack,"",@progbits
This is doing the correct thing in splitting up the load into bytes loads.
