Rust Output At Different Opt Levels

level2.asm

example::test:
        push    rax
        cmp     rsi, 50
        jbe     .LBB23_1
        mov     eax, dword ptr [rdx]
        mov     dword ptr [rdi], eax
        mov     eax, dword ptr [rdx + 4]
        mov     dword ptr [rdi + 4], eax
        mov     eax, dword ptr [rdx + 8]
        mov     dword ptr [rdi + 8], eax
        mov     eax, dword ptr [rdx + 12]
        mov     dword ptr [rdi + 12], eax
        mov     rax, qword ptr [rdx + 16]
        mov     qword ptr [rdi + 16], rax
        mov     eax, dword ptr [rdx + 24]
        mov     dword ptr [rdi + 24], eax
        mov     eax, dword ptr [rdx + 28]
        mov     dword ptr [rdi + 28], eax
        mov     eax, dword ptr [rdx + 32]
        mov     byte ptr [rdi + 32], al
        cmp     eax, 1
        jne     .LBB23_4
        mov     rax, qword ptr [rdx + 40]
        mov     qword ptr [rdi + 33], rax
        mov     eax, dword ptr [rdx + 48]
        mov     dword ptr [rdi + 41], eax
        lea     rax, [rdx + 52]
        jmp     .LBB23_6
.LBB23_4:
        mov     rax, qword ptr [rdx + 48]
        mov     qword ptr [rdi + 33], rax
        mov     eax, dword ptr [rdx + 36]
        mov     dword ptr [rdi + 41], eax
        lea     rax, [rdx + 40]
.LBB23_6:
        mov     eax, dword ptr [rax]
        mov     dword ptr [rdi + 45], eax
        cmp     qword ptr [rdx + 56], 1
        je      .LBB23_7
        mov     byte ptr [rdi + 49], 0
        mov     al, byte ptr [rdx + 80]
        mov     byte ptr [rdi + 50], al
        pop     rax
        ret
.LBB23_1:
        lea     rdi, [rip + .L__unnamed_34]
        lea     rdx, [rip + .L__unnamed_35]
        jmp     .LBB23_2
.LBB23_7:
        mov     byte ptr [rdi + 49], 1
        lea     rdi, [rip + .L__unnamed_34]
        lea     rdx, [rip + .L__unnamed_36]
.LBB23_2:
        mov     esi, 49
        call    std::panicking::begin_panic
        ud2

level3.asm

example::test:
        push    rax
        cmp     rsi, 50
        jbe     .LBB23_1
        movups  xmm0, xmmword ptr [rdx]
        movups  xmmword ptr [rdi], xmm0
        mov     rax, qword ptr [rdx + 16]
        mov     qword ptr [rdi + 16], rax
        mov     rax, qword ptr [rdx + 24]
        mov     qword ptr [rdi + 24], rax
        mov     eax, dword ptr [rdx + 32]
        mov     byte ptr [rdi + 32], al
        cmp     eax, 1
        jne     .LBB23_4
        mov     rax, qword ptr [rdx + 40]
        mov     qword ptr [rdi + 33], rax
        lea     rax, [rdx + 48]
        lea     rcx, [rdx + 52]
        jmp     .LBB23_6
.LBB23_4:
        lea     rax, [rdx + 36]
        mov     rcx, qword ptr [rdx + 48]
        mov     qword ptr [rdi + 33], rcx
        lea     rcx, [rdx + 40]
.LBB23_6:
        mov     eax, dword ptr [rax]
        mov     ecx, dword ptr [rcx]
        mov     dword ptr [rdi + 41], eax
        mov     dword ptr [rdi + 45], ecx
        cmp     qword ptr [rdx + 56], 1
        je      .LBB23_7
        mov     byte ptr [rdi + 49], 0
        mov     al, byte ptr [rdx + 80]
        mov     byte ptr [rdi + 50], al
        pop     rax
        ret
.LBB23_1:
        lea     rdi, [rip + .L__unnamed_34]
        lea     rdx, [rip + .L__unnamed_35]
        mov     esi, 49
        call    std::panicking::begin_panic
        ud2
.LBB23_7:
        mov     byte ptr [rdi + 49], 1
        lea     rdi, [rip + .L__unnamed_34]
        lea     rdx, [rip + .L__unnamed_36]
        mov     esi, 49
        call    std::panicking::begin_panic
        ud2